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Fix diagnostic errors
[deliverable/binutils-gdb.git] / bfd / elf64-ppc.c
1 /* PowerPC64-specific support for 64-bit ELF.
2 Copyright (C) 1999-2018 Free Software Foundation, Inc.
3 Written by Linus Nordberg, Swox AB <info@swox.com>,
4 based on elf32-ppc.c by Ian Lance Taylor.
5 Largely rewritten by Alan Modra.
6
7 This file is part of BFD, the Binary File Descriptor library.
8
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
13
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
18
19 You should have received a copy of the GNU General Public License along
20 with this program; if not, write to the Free Software Foundation, Inc.,
21 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
22
23
24 /* The 64-bit PowerPC ELF ABI may be found at
25 http://www.linuxbase.org/spec/ELF/ppc64/PPC-elf64abi.txt, and
26 http://www.linuxbase.org/spec/ELF/ppc64/spec/book1.html */
27
28 #include "sysdep.h"
29 #include <stdarg.h>
30 #include "bfd.h"
31 #include "bfdlink.h"
32 #include "libbfd.h"
33 #include "elf-bfd.h"
34 #include "elf/ppc64.h"
35 #include "elf64-ppc.h"
36 #include "dwarf2.h"
37
38 static bfd_reloc_status_type ppc64_elf_ha_reloc
39 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
40 static bfd_reloc_status_type ppc64_elf_branch_reloc
41 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
42 static bfd_reloc_status_type ppc64_elf_brtaken_reloc
43 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
44 static bfd_reloc_status_type ppc64_elf_sectoff_reloc
45 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
46 static bfd_reloc_status_type ppc64_elf_sectoff_ha_reloc
47 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
48 static bfd_reloc_status_type ppc64_elf_toc_reloc
49 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
50 static bfd_reloc_status_type ppc64_elf_toc_ha_reloc
51 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
52 static bfd_reloc_status_type ppc64_elf_toc64_reloc
53 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
54 static bfd_reloc_status_type ppc64_elf_unhandled_reloc
55 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
56 static bfd_vma opd_entry_value
57 (asection *, bfd_vma, asection **, bfd_vma *, bfd_boolean);
58
59 #define TARGET_LITTLE_SYM powerpc_elf64_le_vec
60 #define TARGET_LITTLE_NAME "elf64-powerpcle"
61 #define TARGET_BIG_SYM powerpc_elf64_vec
62 #define TARGET_BIG_NAME "elf64-powerpc"
63 #define ELF_ARCH bfd_arch_powerpc
64 #define ELF_TARGET_ID PPC64_ELF_DATA
65 #define ELF_MACHINE_CODE EM_PPC64
66 #define ELF_MAXPAGESIZE 0x10000
67 #define ELF_COMMONPAGESIZE 0x1000
68 #define ELF_RELROPAGESIZE ELF_MAXPAGESIZE
69 #define elf_info_to_howto ppc64_elf_info_to_howto
70
71 #define elf_backend_want_got_sym 0
72 #define elf_backend_want_plt_sym 0
73 #define elf_backend_plt_alignment 3
74 #define elf_backend_plt_not_loaded 1
75 #define elf_backend_got_header_size 8
76 #define elf_backend_want_dynrelro 1
77 #define elf_backend_can_gc_sections 1
78 #define elf_backend_can_refcount 1
79 #define elf_backend_rela_normal 1
80 #define elf_backend_dtrel_excludes_plt 1
81 #define elf_backend_default_execstack 0
82
83 #define bfd_elf64_mkobject ppc64_elf_mkobject
84 #define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup
85 #define bfd_elf64_bfd_reloc_name_lookup ppc64_elf_reloc_name_lookup
86 #define bfd_elf64_bfd_merge_private_bfd_data ppc64_elf_merge_private_bfd_data
87 #define bfd_elf64_bfd_print_private_bfd_data ppc64_elf_print_private_bfd_data
88 #define bfd_elf64_new_section_hook ppc64_elf_new_section_hook
89 #define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create
90 #define bfd_elf64_get_synthetic_symtab ppc64_elf_get_synthetic_symtab
91 #define bfd_elf64_bfd_link_just_syms ppc64_elf_link_just_syms
92 #define bfd_elf64_bfd_gc_sections ppc64_elf_gc_sections
93
94 #define elf_backend_object_p ppc64_elf_object_p
95 #define elf_backend_grok_prstatus ppc64_elf_grok_prstatus
96 #define elf_backend_grok_psinfo ppc64_elf_grok_psinfo
97 #define elf_backend_write_core_note ppc64_elf_write_core_note
98 #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
99 #define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol
100 #define elf_backend_add_symbol_hook ppc64_elf_add_symbol_hook
101 #define elf_backend_check_directives ppc64_elf_before_check_relocs
102 #define elf_backend_notice_as_needed ppc64_elf_notice_as_needed
103 #define elf_backend_archive_symbol_lookup ppc64_elf_archive_symbol_lookup
104 #define elf_backend_check_relocs ppc64_elf_check_relocs
105 #define elf_backend_relocs_compatible _bfd_elf_relocs_compatible
106 #define elf_backend_gc_keep ppc64_elf_gc_keep
107 #define elf_backend_gc_mark_dynamic_ref ppc64_elf_gc_mark_dynamic_ref
108 #define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook
109 #define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol
110 #define elf_backend_hide_symbol ppc64_elf_hide_symbol
111 #define elf_backend_maybe_function_sym ppc64_elf_maybe_function_sym
112 #define elf_backend_always_size_sections ppc64_elf_func_desc_adjust
113 #define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections
114 #define elf_backend_hash_symbol ppc64_elf_hash_symbol
115 #define elf_backend_init_index_section _bfd_elf_init_2_index_sections
116 #define elf_backend_action_discarded ppc64_elf_action_discarded
117 #define elf_backend_relocate_section ppc64_elf_relocate_section
118 #define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol
119 #define elf_backend_reloc_type_class ppc64_elf_reloc_type_class
120 #define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections
121 #define elf_backend_link_output_symbol_hook ppc64_elf_output_symbol_hook
122 #define elf_backend_special_sections ppc64_elf_special_sections
123 #define elf_backend_merge_symbol_attribute ppc64_elf_merge_symbol_attribute
124 #define elf_backend_merge_symbol ppc64_elf_merge_symbol
125 #define elf_backend_get_reloc_section bfd_get_section_by_name
126
127 /* The name of the dynamic interpreter. This is put in the .interp
128 section. */
129 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
130
131 /* The size in bytes of an entry in the procedure linkage table. */
132 #define PLT_ENTRY_SIZE(htab) (htab->opd_abi ? 24 : 8)
133 #define LOCAL_PLT_ENTRY_SIZE(htab) (htab->opd_abi ? 16 : 8)
134
135 /* The initial size of the plt reserved for the dynamic linker. */
136 #define PLT_INITIAL_ENTRY_SIZE(htab) (htab->opd_abi ? 24 : 16)
137
138 /* Offsets to some stack save slots. */
139 #define STK_LR 16
140 #define STK_TOC(htab) (htab->opd_abi ? 40 : 24)
141 /* This one is dodgy. ELFv2 does not have a linker word, so use the
142 CR save slot. Used only by optimised __tls_get_addr call stub,
143 relying on __tls_get_addr_opt not saving CR.. */
144 #define STK_LINKER(htab) (htab->opd_abi ? 32 : 8)
145
146 /* TOC base pointers offset from start of TOC. */
147 #define TOC_BASE_OFF 0x8000
148 /* TOC base alignment. */
149 #define TOC_BASE_ALIGN 256
150
151 /* Offset of tp and dtp pointers from start of TLS block. */
152 #define TP_OFFSET 0x7000
153 #define DTP_OFFSET 0x8000
154
155 /* .plt call stub instructions. The normal stub is like this, but
156 sometimes the .plt entry crosses a 64k boundary and we need to
157 insert an addi to adjust r11. */
158 #define STD_R2_0R1 0xf8410000 /* std %r2,0+40(%r1) */
159 #define ADDIS_R11_R2 0x3d620000 /* addis %r11,%r2,xxx@ha */
160 #define LD_R12_0R11 0xe98b0000 /* ld %r12,xxx+0@l(%r11) */
161 #define MTCTR_R12 0x7d8903a6 /* mtctr %r12 */
162 #define LD_R2_0R11 0xe84b0000 /* ld %r2,xxx+8@l(%r11) */
163 #define LD_R11_0R11 0xe96b0000 /* ld %r11,xxx+16@l(%r11) */
164 #define BCTR 0x4e800420 /* bctr */
165
166 #define ADDI_R11_R11 0x396b0000 /* addi %r11,%r11,off@l */
167 #define ADDIS_R2_R2 0x3c420000 /* addis %r2,%r2,off@ha */
168 #define ADDI_R2_R2 0x38420000 /* addi %r2,%r2,off@l */
169
170 #define XOR_R2_R12_R12 0x7d826278 /* xor %r2,%r12,%r12 */
171 #define ADD_R11_R11_R2 0x7d6b1214 /* add %r11,%r11,%r2 */
172 #define XOR_R11_R12_R12 0x7d8b6278 /* xor %r11,%r12,%r12 */
173 #define ADD_R2_R2_R11 0x7c425a14 /* add %r2,%r2,%r11 */
174 #define CMPLDI_R2_0 0x28220000 /* cmpldi %r2,0 */
175 #define BNECTR 0x4ca20420 /* bnectr+ */
176 #define BNECTR_P4 0x4ce20420 /* bnectr+ */
177
178 #define LD_R12_0R2 0xe9820000 /* ld %r12,xxx+0(%r2) */
179 #define LD_R11_0R2 0xe9620000 /* ld %r11,xxx+0(%r2) */
180 #define LD_R2_0R2 0xe8420000 /* ld %r2,xxx+0(%r2) */
181
182 #define LD_R2_0R1 0xe8410000 /* ld %r2,0(%r1) */
183 #define LD_R2_0R12 0xe84c0000 /* ld %r2,0(%r12) */
184 #define ADD_R2_R2_R12 0x7c426214 /* add %r2,%r2,%r12 */
185
186 #define LIS_R2 0x3c400000 /* lis %r2,xxx@ha */
187 #define ADDIS_R2_R12 0x3c4c0000 /* addis %r2,%r12,xxx@ha */
188 #define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */
189 #define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,xxx@ha */
190 #define LD_R12_0R12 0xe98c0000 /* ld %r12,xxx@l(%r12) */
191
192 /* __glink_PLTresolve stub instructions. We enter with the index in R0. */
193 #define GLINK_PLTRESOLVE_SIZE(htab) \
194 (8u + (htab->opd_abi ? 11 * 4 : 14 * 4))
195 /* 0: */
196 /* .quad plt0-1f */
197 /* __glink: */
198 #define MFLR_R12 0x7d8802a6 /* mflr %12 */
199 #define BCL_20_31 0x429f0005 /* bcl 20,31,1f */
200 /* 1: */
201 #define MFLR_R11 0x7d6802a6 /* mflr %11 */
202 /* ld %2,(0b-1b)(%11) */
203 #define MTLR_R12 0x7d8803a6 /* mtlr %12 */
204 #define ADD_R11_R2_R11 0x7d625a14 /* add %11,%2,%11 */
205 /* ld %12,0(%11) */
206 /* ld %2,8(%11) */
207 /* mtctr %12 */
208 /* ld %11,16(%11) */
209 /* bctr */
210 #define MFLR_R0 0x7c0802a6 /* mflr %r0 */
211 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
212 #define SUB_R12_R12_R11 0x7d8b6050 /* subf %r12,%r11,%r12 */
213 #define ADDI_R0_R12 0x380c0000 /* addi %r0,%r12,0 */
214 #define SRDI_R0_R0_2 0x7800f082 /* rldicl %r0,%r0,62,2 */
215
216 /* Pad with this. */
217 #define NOP 0x60000000
218
219 /* Some other nops. */
220 #define CROR_151515 0x4def7b82
221 #define CROR_313131 0x4ffffb82
222
223 /* .glink entries for the first 32k functions are two instructions. */
224 #define LI_R0_0 0x38000000 /* li %r0,0 */
225 #define B_DOT 0x48000000 /* b . */
226
227 /* After that, we need two instructions to load the index, followed by
228 a branch. */
229 #define LIS_R0_0 0x3c000000 /* lis %r0,0 */
230 #define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
231
232 /* Instructions used by the save and restore reg functions. */
233 #define STD_R0_0R1 0xf8010000 /* std %r0,0(%r1) */
234 #define STD_R0_0R12 0xf80c0000 /* std %r0,0(%r12) */
235 #define LD_R0_0R1 0xe8010000 /* ld %r0,0(%r1) */
236 #define LD_R0_0R12 0xe80c0000 /* ld %r0,0(%r12) */
237 #define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
238 #define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
239 #define LI_R12_0 0x39800000 /* li %r12,0 */
240 #define STVX_VR0_R12_R0 0x7c0c01ce /* stvx %v0,%r12,%r0 */
241 #define LVX_VR0_R12_R0 0x7c0c00ce /* lvx %v0,%r12,%r0 */
242 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
243 #define BLR 0x4e800020 /* blr */
244
245 /* Since .opd is an array of descriptors and each entry will end up
246 with identical R_PPC64_RELATIVE relocs, there is really no need to
247 propagate .opd relocs; The dynamic linker should be taught to
248 relocate .opd without reloc entries. */
249 #ifndef NO_OPD_RELOCS
250 #define NO_OPD_RELOCS 0
251 #endif
252
253 #ifndef ARRAY_SIZE
254 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
255 #endif
256
257 static inline int
258 abiversion (bfd *abfd)
259 {
260 return elf_elfheader (abfd)->e_flags & EF_PPC64_ABI;
261 }
262
263 static inline void
264 set_abiversion (bfd *abfd, int ver)
265 {
266 elf_elfheader (abfd)->e_flags &= ~EF_PPC64_ABI;
267 elf_elfheader (abfd)->e_flags |= ver & EF_PPC64_ABI;
268 }
269 \f
270 #define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1)
271
272 /* Relocation HOWTO's. */
273 static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max];
274
275 static reloc_howto_type ppc64_elf_howto_raw[] =
276 {
277 /* This reloc does nothing. */
278 HOWTO (R_PPC64_NONE, /* type */
279 0, /* rightshift */
280 3, /* size (0 = byte, 1 = short, 2 = long) */
281 0, /* bitsize */
282 FALSE, /* pc_relative */
283 0, /* bitpos */
284 complain_overflow_dont, /* complain_on_overflow */
285 bfd_elf_generic_reloc, /* special_function */
286 "R_PPC64_NONE", /* name */
287 FALSE, /* partial_inplace */
288 0, /* src_mask */
289 0, /* dst_mask */
290 FALSE), /* pcrel_offset */
291
292 /* A standard 32 bit relocation. */
293 HOWTO (R_PPC64_ADDR32, /* type */
294 0, /* rightshift */
295 2, /* size (0 = byte, 1 = short, 2 = long) */
296 32, /* bitsize */
297 FALSE, /* pc_relative */
298 0, /* bitpos */
299 complain_overflow_bitfield, /* complain_on_overflow */
300 bfd_elf_generic_reloc, /* special_function */
301 "R_PPC64_ADDR32", /* name */
302 FALSE, /* partial_inplace */
303 0, /* src_mask */
304 0xffffffff, /* dst_mask */
305 FALSE), /* pcrel_offset */
306
307 /* An absolute 26 bit branch; the lower two bits must be zero.
308 FIXME: we don't check that, we just clear them. */
309 HOWTO (R_PPC64_ADDR24, /* type */
310 0, /* rightshift */
311 2, /* size (0 = byte, 1 = short, 2 = long) */
312 26, /* bitsize */
313 FALSE, /* pc_relative */
314 0, /* bitpos */
315 complain_overflow_bitfield, /* complain_on_overflow */
316 bfd_elf_generic_reloc, /* special_function */
317 "R_PPC64_ADDR24", /* name */
318 FALSE, /* partial_inplace */
319 0, /* src_mask */
320 0x03fffffc, /* dst_mask */
321 FALSE), /* pcrel_offset */
322
323 /* A standard 16 bit relocation. */
324 HOWTO (R_PPC64_ADDR16, /* type */
325 0, /* rightshift */
326 1, /* size (0 = byte, 1 = short, 2 = long) */
327 16, /* bitsize */
328 FALSE, /* pc_relative */
329 0, /* bitpos */
330 complain_overflow_bitfield, /* complain_on_overflow */
331 bfd_elf_generic_reloc, /* special_function */
332 "R_PPC64_ADDR16", /* name */
333 FALSE, /* partial_inplace */
334 0, /* src_mask */
335 0xffff, /* dst_mask */
336 FALSE), /* pcrel_offset */
337
338 /* A 16 bit relocation without overflow. */
339 HOWTO (R_PPC64_ADDR16_LO, /* type */
340 0, /* rightshift */
341 1, /* size (0 = byte, 1 = short, 2 = long) */
342 16, /* bitsize */
343 FALSE, /* pc_relative */
344 0, /* bitpos */
345 complain_overflow_dont,/* complain_on_overflow */
346 bfd_elf_generic_reloc, /* special_function */
347 "R_PPC64_ADDR16_LO", /* name */
348 FALSE, /* partial_inplace */
349 0, /* src_mask */
350 0xffff, /* dst_mask */
351 FALSE), /* pcrel_offset */
352
353 /* Bits 16-31 of an address. */
354 HOWTO (R_PPC64_ADDR16_HI, /* type */
355 16, /* rightshift */
356 1, /* size (0 = byte, 1 = short, 2 = long) */
357 16, /* bitsize */
358 FALSE, /* pc_relative */
359 0, /* bitpos */
360 complain_overflow_signed, /* complain_on_overflow */
361 bfd_elf_generic_reloc, /* special_function */
362 "R_PPC64_ADDR16_HI", /* name */
363 FALSE, /* partial_inplace */
364 0, /* src_mask */
365 0xffff, /* dst_mask */
366 FALSE), /* pcrel_offset */
367
368 /* Bits 16-31 of an address, plus 1 if the contents of the low 16
369 bits, treated as a signed number, is negative. */
370 HOWTO (R_PPC64_ADDR16_HA, /* type */
371 16, /* rightshift */
372 1, /* size (0 = byte, 1 = short, 2 = long) */
373 16, /* bitsize */
374 FALSE, /* pc_relative */
375 0, /* bitpos */
376 complain_overflow_signed, /* complain_on_overflow */
377 ppc64_elf_ha_reloc, /* special_function */
378 "R_PPC64_ADDR16_HA", /* name */
379 FALSE, /* partial_inplace */
380 0, /* src_mask */
381 0xffff, /* dst_mask */
382 FALSE), /* pcrel_offset */
383
384 /* An absolute 16 bit branch; the lower two bits must be zero.
385 FIXME: we don't check that, we just clear them. */
386 HOWTO (R_PPC64_ADDR14, /* type */
387 0, /* rightshift */
388 2, /* size (0 = byte, 1 = short, 2 = long) */
389 16, /* bitsize */
390 FALSE, /* pc_relative */
391 0, /* bitpos */
392 complain_overflow_signed, /* complain_on_overflow */
393 ppc64_elf_branch_reloc, /* special_function */
394 "R_PPC64_ADDR14", /* name */
395 FALSE, /* partial_inplace */
396 0, /* src_mask */
397 0x0000fffc, /* dst_mask */
398 FALSE), /* pcrel_offset */
399
400 /* An absolute 16 bit branch, for which bit 10 should be set to
401 indicate that the branch is expected to be taken. The lower two
402 bits must be zero. */
403 HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */
404 0, /* rightshift */
405 2, /* size (0 = byte, 1 = short, 2 = long) */
406 16, /* bitsize */
407 FALSE, /* pc_relative */
408 0, /* bitpos */
409 complain_overflow_signed, /* complain_on_overflow */
410 ppc64_elf_brtaken_reloc, /* special_function */
411 "R_PPC64_ADDR14_BRTAKEN",/* name */
412 FALSE, /* partial_inplace */
413 0, /* src_mask */
414 0x0000fffc, /* dst_mask */
415 FALSE), /* pcrel_offset */
416
417 /* An absolute 16 bit branch, for which bit 10 should be set to
418 indicate that the branch is not expected to be taken. The lower
419 two bits must be zero. */
420 HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */
421 0, /* rightshift */
422 2, /* size (0 = byte, 1 = short, 2 = long) */
423 16, /* bitsize */
424 FALSE, /* pc_relative */
425 0, /* bitpos */
426 complain_overflow_signed, /* complain_on_overflow */
427 ppc64_elf_brtaken_reloc, /* special_function */
428 "R_PPC64_ADDR14_BRNTAKEN",/* name */
429 FALSE, /* partial_inplace */
430 0, /* src_mask */
431 0x0000fffc, /* dst_mask */
432 FALSE), /* pcrel_offset */
433
434 /* A relative 26 bit branch; the lower two bits must be zero. */
435 HOWTO (R_PPC64_REL24, /* type */
436 0, /* rightshift */
437 2, /* size (0 = byte, 1 = short, 2 = long) */
438 26, /* bitsize */
439 TRUE, /* pc_relative */
440 0, /* bitpos */
441 complain_overflow_signed, /* complain_on_overflow */
442 ppc64_elf_branch_reloc, /* special_function */
443 "R_PPC64_REL24", /* name */
444 FALSE, /* partial_inplace */
445 0, /* src_mask */
446 0x03fffffc, /* dst_mask */
447 TRUE), /* pcrel_offset */
448
449 /* A relative 16 bit branch; the lower two bits must be zero. */
450 HOWTO (R_PPC64_REL14, /* type */
451 0, /* rightshift */
452 2, /* size (0 = byte, 1 = short, 2 = long) */
453 16, /* bitsize */
454 TRUE, /* pc_relative */
455 0, /* bitpos */
456 complain_overflow_signed, /* complain_on_overflow */
457 ppc64_elf_branch_reloc, /* special_function */
458 "R_PPC64_REL14", /* name */
459 FALSE, /* partial_inplace */
460 0, /* src_mask */
461 0x0000fffc, /* dst_mask */
462 TRUE), /* pcrel_offset */
463
464 /* A relative 16 bit branch. Bit 10 should be set to indicate that
465 the branch is expected to be taken. The lower two bits must be
466 zero. */
467 HOWTO (R_PPC64_REL14_BRTAKEN, /* type */
468 0, /* rightshift */
469 2, /* size (0 = byte, 1 = short, 2 = long) */
470 16, /* bitsize */
471 TRUE, /* pc_relative */
472 0, /* bitpos */
473 complain_overflow_signed, /* complain_on_overflow */
474 ppc64_elf_brtaken_reloc, /* special_function */
475 "R_PPC64_REL14_BRTAKEN", /* name */
476 FALSE, /* partial_inplace */
477 0, /* src_mask */
478 0x0000fffc, /* dst_mask */
479 TRUE), /* pcrel_offset */
480
481 /* A relative 16 bit branch. Bit 10 should be set to indicate that
482 the branch is not expected to be taken. The lower two bits must
483 be zero. */
484 HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */
485 0, /* rightshift */
486 2, /* size (0 = byte, 1 = short, 2 = long) */
487 16, /* bitsize */
488 TRUE, /* pc_relative */
489 0, /* bitpos */
490 complain_overflow_signed, /* complain_on_overflow */
491 ppc64_elf_brtaken_reloc, /* special_function */
492 "R_PPC64_REL14_BRNTAKEN",/* name */
493 FALSE, /* partial_inplace */
494 0, /* src_mask */
495 0x0000fffc, /* dst_mask */
496 TRUE), /* pcrel_offset */
497
498 /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
499 symbol. */
500 HOWTO (R_PPC64_GOT16, /* type */
501 0, /* rightshift */
502 1, /* size (0 = byte, 1 = short, 2 = long) */
503 16, /* bitsize */
504 FALSE, /* pc_relative */
505 0, /* bitpos */
506 complain_overflow_signed, /* complain_on_overflow */
507 ppc64_elf_unhandled_reloc, /* special_function */
508 "R_PPC64_GOT16", /* name */
509 FALSE, /* partial_inplace */
510 0, /* src_mask */
511 0xffff, /* dst_mask */
512 FALSE), /* pcrel_offset */
513
514 /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
515 the symbol. */
516 HOWTO (R_PPC64_GOT16_LO, /* type */
517 0, /* rightshift */
518 1, /* size (0 = byte, 1 = short, 2 = long) */
519 16, /* bitsize */
520 FALSE, /* pc_relative */
521 0, /* bitpos */
522 complain_overflow_dont, /* complain_on_overflow */
523 ppc64_elf_unhandled_reloc, /* special_function */
524 "R_PPC64_GOT16_LO", /* name */
525 FALSE, /* partial_inplace */
526 0, /* src_mask */
527 0xffff, /* dst_mask */
528 FALSE), /* pcrel_offset */
529
530 /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
531 the symbol. */
532 HOWTO (R_PPC64_GOT16_HI, /* type */
533 16, /* rightshift */
534 1, /* size (0 = byte, 1 = short, 2 = long) */
535 16, /* bitsize */
536 FALSE, /* pc_relative */
537 0, /* bitpos */
538 complain_overflow_signed,/* complain_on_overflow */
539 ppc64_elf_unhandled_reloc, /* special_function */
540 "R_PPC64_GOT16_HI", /* name */
541 FALSE, /* partial_inplace */
542 0, /* src_mask */
543 0xffff, /* dst_mask */
544 FALSE), /* pcrel_offset */
545
546 /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
547 the symbol. */
548 HOWTO (R_PPC64_GOT16_HA, /* type */
549 16, /* rightshift */
550 1, /* size (0 = byte, 1 = short, 2 = long) */
551 16, /* bitsize */
552 FALSE, /* pc_relative */
553 0, /* bitpos */
554 complain_overflow_signed,/* complain_on_overflow */
555 ppc64_elf_unhandled_reloc, /* special_function */
556 "R_PPC64_GOT16_HA", /* name */
557 FALSE, /* partial_inplace */
558 0, /* src_mask */
559 0xffff, /* dst_mask */
560 FALSE), /* pcrel_offset */
561
562 /* This is used only by the dynamic linker. The symbol should exist
563 both in the object being run and in some shared library. The
564 dynamic linker copies the data addressed by the symbol from the
565 shared library into the object, because the object being
566 run has to have the data at some particular address. */
567 HOWTO (R_PPC64_COPY, /* type */
568 0, /* rightshift */
569 0, /* this one is variable size */
570 0, /* bitsize */
571 FALSE, /* pc_relative */
572 0, /* bitpos */
573 complain_overflow_dont, /* complain_on_overflow */
574 ppc64_elf_unhandled_reloc, /* special_function */
575 "R_PPC64_COPY", /* name */
576 FALSE, /* partial_inplace */
577 0, /* src_mask */
578 0, /* dst_mask */
579 FALSE), /* pcrel_offset */
580
581 /* Like R_PPC64_ADDR64, but used when setting global offset table
582 entries. */
583 HOWTO (R_PPC64_GLOB_DAT, /* type */
584 0, /* rightshift */
585 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
586 64, /* bitsize */
587 FALSE, /* pc_relative */
588 0, /* bitpos */
589 complain_overflow_dont, /* complain_on_overflow */
590 ppc64_elf_unhandled_reloc, /* special_function */
591 "R_PPC64_GLOB_DAT", /* name */
592 FALSE, /* partial_inplace */
593 0, /* src_mask */
594 ONES (64), /* dst_mask */
595 FALSE), /* pcrel_offset */
596
597 /* Created by the link editor. Marks a procedure linkage table
598 entry for a symbol. */
599 HOWTO (R_PPC64_JMP_SLOT, /* type */
600 0, /* rightshift */
601 0, /* size (0 = byte, 1 = short, 2 = long) */
602 0, /* bitsize */
603 FALSE, /* pc_relative */
604 0, /* bitpos */
605 complain_overflow_dont, /* complain_on_overflow */
606 ppc64_elf_unhandled_reloc, /* special_function */
607 "R_PPC64_JMP_SLOT", /* name */
608 FALSE, /* partial_inplace */
609 0, /* src_mask */
610 0, /* dst_mask */
611 FALSE), /* pcrel_offset */
612
613 /* Used only by the dynamic linker. When the object is run, this
614 doubleword64 is set to the load address of the object, plus the
615 addend. */
616 HOWTO (R_PPC64_RELATIVE, /* type */
617 0, /* rightshift */
618 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
619 64, /* bitsize */
620 FALSE, /* pc_relative */
621 0, /* bitpos */
622 complain_overflow_dont, /* complain_on_overflow */
623 bfd_elf_generic_reloc, /* special_function */
624 "R_PPC64_RELATIVE", /* name */
625 FALSE, /* partial_inplace */
626 0, /* src_mask */
627 ONES (64), /* dst_mask */
628 FALSE), /* pcrel_offset */
629
630 /* Like R_PPC64_ADDR32, but may be unaligned. */
631 HOWTO (R_PPC64_UADDR32, /* type */
632 0, /* rightshift */
633 2, /* size (0 = byte, 1 = short, 2 = long) */
634 32, /* bitsize */
635 FALSE, /* pc_relative */
636 0, /* bitpos */
637 complain_overflow_bitfield, /* complain_on_overflow */
638 bfd_elf_generic_reloc, /* special_function */
639 "R_PPC64_UADDR32", /* name */
640 FALSE, /* partial_inplace */
641 0, /* src_mask */
642 0xffffffff, /* dst_mask */
643 FALSE), /* pcrel_offset */
644
645 /* Like R_PPC64_ADDR16, but may be unaligned. */
646 HOWTO (R_PPC64_UADDR16, /* type */
647 0, /* rightshift */
648 1, /* size (0 = byte, 1 = short, 2 = long) */
649 16, /* bitsize */
650 FALSE, /* pc_relative */
651 0, /* bitpos */
652 complain_overflow_bitfield, /* complain_on_overflow */
653 bfd_elf_generic_reloc, /* special_function */
654 "R_PPC64_UADDR16", /* name */
655 FALSE, /* partial_inplace */
656 0, /* src_mask */
657 0xffff, /* dst_mask */
658 FALSE), /* pcrel_offset */
659
660 /* 32-bit PC relative. */
661 HOWTO (R_PPC64_REL32, /* type */
662 0, /* rightshift */
663 2, /* size (0 = byte, 1 = short, 2 = long) */
664 32, /* bitsize */
665 TRUE, /* pc_relative */
666 0, /* bitpos */
667 complain_overflow_signed, /* complain_on_overflow */
668 bfd_elf_generic_reloc, /* special_function */
669 "R_PPC64_REL32", /* name */
670 FALSE, /* partial_inplace */
671 0, /* src_mask */
672 0xffffffff, /* dst_mask */
673 TRUE), /* pcrel_offset */
674
675 /* 32-bit relocation to the symbol's procedure linkage table. */
676 HOWTO (R_PPC64_PLT32, /* type */
677 0, /* rightshift */
678 2, /* size (0 = byte, 1 = short, 2 = long) */
679 32, /* bitsize */
680 FALSE, /* pc_relative */
681 0, /* bitpos */
682 complain_overflow_bitfield, /* complain_on_overflow */
683 ppc64_elf_unhandled_reloc, /* special_function */
684 "R_PPC64_PLT32", /* name */
685 FALSE, /* partial_inplace */
686 0, /* src_mask */
687 0xffffffff, /* dst_mask */
688 FALSE), /* pcrel_offset */
689
690 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
691 FIXME: R_PPC64_PLTREL32 not supported. */
692 HOWTO (R_PPC64_PLTREL32, /* type */
693 0, /* rightshift */
694 2, /* size (0 = byte, 1 = short, 2 = long) */
695 32, /* bitsize */
696 TRUE, /* pc_relative */
697 0, /* bitpos */
698 complain_overflow_signed, /* complain_on_overflow */
699 ppc64_elf_unhandled_reloc, /* special_function */
700 "R_PPC64_PLTREL32", /* name */
701 FALSE, /* partial_inplace */
702 0, /* src_mask */
703 0xffffffff, /* dst_mask */
704 TRUE), /* pcrel_offset */
705
706 /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
707 the symbol. */
708 HOWTO (R_PPC64_PLT16_LO, /* type */
709 0, /* rightshift */
710 1, /* size (0 = byte, 1 = short, 2 = long) */
711 16, /* bitsize */
712 FALSE, /* pc_relative */
713 0, /* bitpos */
714 complain_overflow_dont, /* complain_on_overflow */
715 ppc64_elf_unhandled_reloc, /* special_function */
716 "R_PPC64_PLT16_LO", /* name */
717 FALSE, /* partial_inplace */
718 0, /* src_mask */
719 0xffff, /* dst_mask */
720 FALSE), /* pcrel_offset */
721
722 /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
723 the symbol. */
724 HOWTO (R_PPC64_PLT16_HI, /* type */
725 16, /* rightshift */
726 1, /* size (0 = byte, 1 = short, 2 = long) */
727 16, /* bitsize */
728 FALSE, /* pc_relative */
729 0, /* bitpos */
730 complain_overflow_signed, /* complain_on_overflow */
731 ppc64_elf_unhandled_reloc, /* special_function */
732 "R_PPC64_PLT16_HI", /* name */
733 FALSE, /* partial_inplace */
734 0, /* src_mask */
735 0xffff, /* dst_mask */
736 FALSE), /* pcrel_offset */
737
738 /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
739 the symbol. */
740 HOWTO (R_PPC64_PLT16_HA, /* type */
741 16, /* rightshift */
742 1, /* size (0 = byte, 1 = short, 2 = long) */
743 16, /* bitsize */
744 FALSE, /* pc_relative */
745 0, /* bitpos */
746 complain_overflow_signed, /* complain_on_overflow */
747 ppc64_elf_unhandled_reloc, /* special_function */
748 "R_PPC64_PLT16_HA", /* name */
749 FALSE, /* partial_inplace */
750 0, /* src_mask */
751 0xffff, /* dst_mask */
752 FALSE), /* pcrel_offset */
753
754 /* 16-bit section relative relocation. */
755 HOWTO (R_PPC64_SECTOFF, /* type */
756 0, /* rightshift */
757 1, /* size (0 = byte, 1 = short, 2 = long) */
758 16, /* bitsize */
759 FALSE, /* pc_relative */
760 0, /* bitpos */
761 complain_overflow_signed, /* complain_on_overflow */
762 ppc64_elf_sectoff_reloc, /* special_function */
763 "R_PPC64_SECTOFF", /* name */
764 FALSE, /* partial_inplace */
765 0, /* src_mask */
766 0xffff, /* dst_mask */
767 FALSE), /* pcrel_offset */
768
769 /* Like R_PPC64_SECTOFF, but no overflow warning. */
770 HOWTO (R_PPC64_SECTOFF_LO, /* type */
771 0, /* rightshift */
772 1, /* size (0 = byte, 1 = short, 2 = long) */
773 16, /* bitsize */
774 FALSE, /* pc_relative */
775 0, /* bitpos */
776 complain_overflow_dont, /* complain_on_overflow */
777 ppc64_elf_sectoff_reloc, /* special_function */
778 "R_PPC64_SECTOFF_LO", /* name */
779 FALSE, /* partial_inplace */
780 0, /* src_mask */
781 0xffff, /* dst_mask */
782 FALSE), /* pcrel_offset */
783
784 /* 16-bit upper half section relative relocation. */
785 HOWTO (R_PPC64_SECTOFF_HI, /* type */
786 16, /* rightshift */
787 1, /* size (0 = byte, 1 = short, 2 = long) */
788 16, /* bitsize */
789 FALSE, /* pc_relative */
790 0, /* bitpos */
791 complain_overflow_signed, /* complain_on_overflow */
792 ppc64_elf_sectoff_reloc, /* special_function */
793 "R_PPC64_SECTOFF_HI", /* name */
794 FALSE, /* partial_inplace */
795 0, /* src_mask */
796 0xffff, /* dst_mask */
797 FALSE), /* pcrel_offset */
798
799 /* 16-bit upper half adjusted section relative relocation. */
800 HOWTO (R_PPC64_SECTOFF_HA, /* type */
801 16, /* rightshift */
802 1, /* size (0 = byte, 1 = short, 2 = long) */
803 16, /* bitsize */
804 FALSE, /* pc_relative */
805 0, /* bitpos */
806 complain_overflow_signed, /* complain_on_overflow */
807 ppc64_elf_sectoff_ha_reloc, /* special_function */
808 "R_PPC64_SECTOFF_HA", /* name */
809 FALSE, /* partial_inplace */
810 0, /* src_mask */
811 0xffff, /* dst_mask */
812 FALSE), /* pcrel_offset */
813
814 /* Like R_PPC64_REL24 without touching the two least significant bits. */
815 HOWTO (R_PPC64_REL30, /* type */
816 2, /* rightshift */
817 2, /* size (0 = byte, 1 = short, 2 = long) */
818 30, /* bitsize */
819 TRUE, /* pc_relative */
820 0, /* bitpos */
821 complain_overflow_dont, /* complain_on_overflow */
822 bfd_elf_generic_reloc, /* special_function */
823 "R_PPC64_REL30", /* name */
824 FALSE, /* partial_inplace */
825 0, /* src_mask */
826 0xfffffffc, /* dst_mask */
827 TRUE), /* pcrel_offset */
828
829 /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
830
831 /* A standard 64-bit relocation. */
832 HOWTO (R_PPC64_ADDR64, /* type */
833 0, /* rightshift */
834 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
835 64, /* bitsize */
836 FALSE, /* pc_relative */
837 0, /* bitpos */
838 complain_overflow_dont, /* complain_on_overflow */
839 bfd_elf_generic_reloc, /* special_function */
840 "R_PPC64_ADDR64", /* name */
841 FALSE, /* partial_inplace */
842 0, /* src_mask */
843 ONES (64), /* dst_mask */
844 FALSE), /* pcrel_offset */
845
846 /* The bits 32-47 of an address. */
847 HOWTO (R_PPC64_ADDR16_HIGHER, /* type */
848 32, /* rightshift */
849 1, /* size (0 = byte, 1 = short, 2 = long) */
850 16, /* bitsize */
851 FALSE, /* pc_relative */
852 0, /* bitpos */
853 complain_overflow_dont, /* complain_on_overflow */
854 bfd_elf_generic_reloc, /* special_function */
855 "R_PPC64_ADDR16_HIGHER", /* name */
856 FALSE, /* partial_inplace */
857 0, /* src_mask */
858 0xffff, /* dst_mask */
859 FALSE), /* pcrel_offset */
860
861 /* The bits 32-47 of an address, plus 1 if the contents of the low
862 16 bits, treated as a signed number, is negative. */
863 HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */
864 32, /* rightshift */
865 1, /* size (0 = byte, 1 = short, 2 = long) */
866 16, /* bitsize */
867 FALSE, /* pc_relative */
868 0, /* bitpos */
869 complain_overflow_dont, /* complain_on_overflow */
870 ppc64_elf_ha_reloc, /* special_function */
871 "R_PPC64_ADDR16_HIGHERA", /* name */
872 FALSE, /* partial_inplace */
873 0, /* src_mask */
874 0xffff, /* dst_mask */
875 FALSE), /* pcrel_offset */
876
877 /* The bits 48-63 of an address. */
878 HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */
879 48, /* rightshift */
880 1, /* size (0 = byte, 1 = short, 2 = long) */
881 16, /* bitsize */
882 FALSE, /* pc_relative */
883 0, /* bitpos */
884 complain_overflow_dont, /* complain_on_overflow */
885 bfd_elf_generic_reloc, /* special_function */
886 "R_PPC64_ADDR16_HIGHEST", /* name */
887 FALSE, /* partial_inplace */
888 0, /* src_mask */
889 0xffff, /* dst_mask */
890 FALSE), /* pcrel_offset */
891
892 /* The bits 48-63 of an address, plus 1 if the contents of the low
893 16 bits, treated as a signed number, is negative. */
894 HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */
895 48, /* rightshift */
896 1, /* size (0 = byte, 1 = short, 2 = long) */
897 16, /* bitsize */
898 FALSE, /* pc_relative */
899 0, /* bitpos */
900 complain_overflow_dont, /* complain_on_overflow */
901 ppc64_elf_ha_reloc, /* special_function */
902 "R_PPC64_ADDR16_HIGHESTA", /* name */
903 FALSE, /* partial_inplace */
904 0, /* src_mask */
905 0xffff, /* dst_mask */
906 FALSE), /* pcrel_offset */
907
908 /* Like ADDR64, but may be unaligned. */
909 HOWTO (R_PPC64_UADDR64, /* type */
910 0, /* rightshift */
911 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
912 64, /* bitsize */
913 FALSE, /* pc_relative */
914 0, /* bitpos */
915 complain_overflow_dont, /* complain_on_overflow */
916 bfd_elf_generic_reloc, /* special_function */
917 "R_PPC64_UADDR64", /* name */
918 FALSE, /* partial_inplace */
919 0, /* src_mask */
920 ONES (64), /* dst_mask */
921 FALSE), /* pcrel_offset */
922
923 /* 64-bit relative relocation. */
924 HOWTO (R_PPC64_REL64, /* type */
925 0, /* rightshift */
926 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
927 64, /* bitsize */
928 TRUE, /* pc_relative */
929 0, /* bitpos */
930 complain_overflow_dont, /* complain_on_overflow */
931 bfd_elf_generic_reloc, /* special_function */
932 "R_PPC64_REL64", /* name */
933 FALSE, /* partial_inplace */
934 0, /* src_mask */
935 ONES (64), /* dst_mask */
936 TRUE), /* pcrel_offset */
937
938 /* 64-bit relocation to the symbol's procedure linkage table. */
939 HOWTO (R_PPC64_PLT64, /* type */
940 0, /* rightshift */
941 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
942 64, /* bitsize */
943 FALSE, /* pc_relative */
944 0, /* bitpos */
945 complain_overflow_dont, /* complain_on_overflow */
946 ppc64_elf_unhandled_reloc, /* special_function */
947 "R_PPC64_PLT64", /* name */
948 FALSE, /* partial_inplace */
949 0, /* src_mask */
950 ONES (64), /* dst_mask */
951 FALSE), /* pcrel_offset */
952
953 /* 64-bit PC relative relocation to the symbol's procedure linkage
954 table. */
955 /* FIXME: R_PPC64_PLTREL64 not supported. */
956 HOWTO (R_PPC64_PLTREL64, /* type */
957 0, /* rightshift */
958 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
959 64, /* bitsize */
960 TRUE, /* pc_relative */
961 0, /* bitpos */
962 complain_overflow_dont, /* complain_on_overflow */
963 ppc64_elf_unhandled_reloc, /* special_function */
964 "R_PPC64_PLTREL64", /* name */
965 FALSE, /* partial_inplace */
966 0, /* src_mask */
967 ONES (64), /* dst_mask */
968 TRUE), /* pcrel_offset */
969
970 /* 16 bit TOC-relative relocation. */
971
972 /* R_PPC64_TOC16 47 half16* S + A - .TOC. */
973 HOWTO (R_PPC64_TOC16, /* type */
974 0, /* rightshift */
975 1, /* size (0 = byte, 1 = short, 2 = long) */
976 16, /* bitsize */
977 FALSE, /* pc_relative */
978 0, /* bitpos */
979 complain_overflow_signed, /* complain_on_overflow */
980 ppc64_elf_toc_reloc, /* special_function */
981 "R_PPC64_TOC16", /* name */
982 FALSE, /* partial_inplace */
983 0, /* src_mask */
984 0xffff, /* dst_mask */
985 FALSE), /* pcrel_offset */
986
987 /* 16 bit TOC-relative relocation without overflow. */
988
989 /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
990 HOWTO (R_PPC64_TOC16_LO, /* type */
991 0, /* rightshift */
992 1, /* size (0 = byte, 1 = short, 2 = long) */
993 16, /* bitsize */
994 FALSE, /* pc_relative */
995 0, /* bitpos */
996 complain_overflow_dont, /* complain_on_overflow */
997 ppc64_elf_toc_reloc, /* special_function */
998 "R_PPC64_TOC16_LO", /* name */
999 FALSE, /* partial_inplace */
1000 0, /* src_mask */
1001 0xffff, /* dst_mask */
1002 FALSE), /* pcrel_offset */
1003
1004 /* 16 bit TOC-relative relocation, high 16 bits. */
1005
1006 /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
1007 HOWTO (R_PPC64_TOC16_HI, /* type */
1008 16, /* rightshift */
1009 1, /* size (0 = byte, 1 = short, 2 = long) */
1010 16, /* bitsize */
1011 FALSE, /* pc_relative */
1012 0, /* bitpos */
1013 complain_overflow_signed, /* complain_on_overflow */
1014 ppc64_elf_toc_reloc, /* special_function */
1015 "R_PPC64_TOC16_HI", /* name */
1016 FALSE, /* partial_inplace */
1017 0, /* src_mask */
1018 0xffff, /* dst_mask */
1019 FALSE), /* pcrel_offset */
1020
1021 /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the
1022 contents of the low 16 bits, treated as a signed number, is
1023 negative. */
1024
1025 /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
1026 HOWTO (R_PPC64_TOC16_HA, /* type */
1027 16, /* rightshift */
1028 1, /* size (0 = byte, 1 = short, 2 = long) */
1029 16, /* bitsize */
1030 FALSE, /* pc_relative */
1031 0, /* bitpos */
1032 complain_overflow_signed, /* complain_on_overflow */
1033 ppc64_elf_toc_ha_reloc, /* special_function */
1034 "R_PPC64_TOC16_HA", /* name */
1035 FALSE, /* partial_inplace */
1036 0, /* src_mask */
1037 0xffff, /* dst_mask */
1038 FALSE), /* pcrel_offset */
1039
1040 /* 64-bit relocation; insert value of TOC base (.TOC.). */
1041
1042 /* R_PPC64_TOC 51 doubleword64 .TOC. */
1043 HOWTO (R_PPC64_TOC, /* type */
1044 0, /* rightshift */
1045 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1046 64, /* bitsize */
1047 FALSE, /* pc_relative */
1048 0, /* bitpos */
1049 complain_overflow_dont, /* complain_on_overflow */
1050 ppc64_elf_toc64_reloc, /* special_function */
1051 "R_PPC64_TOC", /* name */
1052 FALSE, /* partial_inplace */
1053 0, /* src_mask */
1054 ONES (64), /* dst_mask */
1055 FALSE), /* pcrel_offset */
1056
1057 /* Like R_PPC64_GOT16, but also informs the link editor that the
1058 value to relocate may (!) refer to a PLT entry which the link
1059 editor (a) may replace with the symbol value. If the link editor
1060 is unable to fully resolve the symbol, it may (b) create a PLT
1061 entry and store the address to the new PLT entry in the GOT.
1062 This permits lazy resolution of function symbols at run time.
1063 The link editor may also skip all of this and just (c) emit a
1064 R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
1065 /* FIXME: R_PPC64_PLTGOT16 not implemented. */
1066 HOWTO (R_PPC64_PLTGOT16, /* type */
1067 0, /* rightshift */
1068 1, /* size (0 = byte, 1 = short, 2 = long) */
1069 16, /* bitsize */
1070 FALSE, /* pc_relative */
1071 0, /* bitpos */
1072 complain_overflow_signed, /* complain_on_overflow */
1073 ppc64_elf_unhandled_reloc, /* special_function */
1074 "R_PPC64_PLTGOT16", /* name */
1075 FALSE, /* partial_inplace */
1076 0, /* src_mask */
1077 0xffff, /* dst_mask */
1078 FALSE), /* pcrel_offset */
1079
1080 /* Like R_PPC64_PLTGOT16, but without overflow. */
1081 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1082 HOWTO (R_PPC64_PLTGOT16_LO, /* type */
1083 0, /* rightshift */
1084 1, /* size (0 = byte, 1 = short, 2 = long) */
1085 16, /* bitsize */
1086 FALSE, /* pc_relative */
1087 0, /* bitpos */
1088 complain_overflow_dont, /* complain_on_overflow */
1089 ppc64_elf_unhandled_reloc, /* special_function */
1090 "R_PPC64_PLTGOT16_LO", /* name */
1091 FALSE, /* partial_inplace */
1092 0, /* src_mask */
1093 0xffff, /* dst_mask */
1094 FALSE), /* pcrel_offset */
1095
1096 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */
1097 /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */
1098 HOWTO (R_PPC64_PLTGOT16_HI, /* type */
1099 16, /* rightshift */
1100 1, /* size (0 = byte, 1 = short, 2 = long) */
1101 16, /* bitsize */
1102 FALSE, /* pc_relative */
1103 0, /* bitpos */
1104 complain_overflow_signed, /* complain_on_overflow */
1105 ppc64_elf_unhandled_reloc, /* special_function */
1106 "R_PPC64_PLTGOT16_HI", /* name */
1107 FALSE, /* partial_inplace */
1108 0, /* src_mask */
1109 0xffff, /* dst_mask */
1110 FALSE), /* pcrel_offset */
1111
1112 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus
1113 1 if the contents of the low 16 bits, treated as a signed number,
1114 is negative. */
1115 /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */
1116 HOWTO (R_PPC64_PLTGOT16_HA, /* type */
1117 16, /* rightshift */
1118 1, /* size (0 = byte, 1 = short, 2 = long) */
1119 16, /* bitsize */
1120 FALSE, /* pc_relative */
1121 0, /* bitpos */
1122 complain_overflow_signed, /* complain_on_overflow */
1123 ppc64_elf_unhandled_reloc, /* special_function */
1124 "R_PPC64_PLTGOT16_HA", /* name */
1125 FALSE, /* partial_inplace */
1126 0, /* src_mask */
1127 0xffff, /* dst_mask */
1128 FALSE), /* pcrel_offset */
1129
1130 /* Like R_PPC64_ADDR16, but for instructions with a DS field. */
1131 HOWTO (R_PPC64_ADDR16_DS, /* type */
1132 0, /* rightshift */
1133 1, /* size (0 = byte, 1 = short, 2 = long) */
1134 16, /* bitsize */
1135 FALSE, /* pc_relative */
1136 0, /* bitpos */
1137 complain_overflow_signed, /* complain_on_overflow */
1138 bfd_elf_generic_reloc, /* special_function */
1139 "R_PPC64_ADDR16_DS", /* name */
1140 FALSE, /* partial_inplace */
1141 0, /* src_mask */
1142 0xfffc, /* dst_mask */
1143 FALSE), /* pcrel_offset */
1144
1145 /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
1146 HOWTO (R_PPC64_ADDR16_LO_DS, /* type */
1147 0, /* rightshift */
1148 1, /* size (0 = byte, 1 = short, 2 = long) */
1149 16, /* bitsize */
1150 FALSE, /* pc_relative */
1151 0, /* bitpos */
1152 complain_overflow_dont,/* complain_on_overflow */
1153 bfd_elf_generic_reloc, /* special_function */
1154 "R_PPC64_ADDR16_LO_DS",/* name */
1155 FALSE, /* partial_inplace */
1156 0, /* src_mask */
1157 0xfffc, /* dst_mask */
1158 FALSE), /* pcrel_offset */
1159
1160 /* Like R_PPC64_GOT16, but for instructions with a DS field. */
1161 HOWTO (R_PPC64_GOT16_DS, /* type */
1162 0, /* rightshift */
1163 1, /* size (0 = byte, 1 = short, 2 = long) */
1164 16, /* bitsize */
1165 FALSE, /* pc_relative */
1166 0, /* bitpos */
1167 complain_overflow_signed, /* complain_on_overflow */
1168 ppc64_elf_unhandled_reloc, /* special_function */
1169 "R_PPC64_GOT16_DS", /* name */
1170 FALSE, /* partial_inplace */
1171 0, /* src_mask */
1172 0xfffc, /* dst_mask */
1173 FALSE), /* pcrel_offset */
1174
1175 /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
1176 HOWTO (R_PPC64_GOT16_LO_DS, /* type */
1177 0, /* rightshift */
1178 1, /* size (0 = byte, 1 = short, 2 = long) */
1179 16, /* bitsize */
1180 FALSE, /* pc_relative */
1181 0, /* bitpos */
1182 complain_overflow_dont, /* complain_on_overflow */
1183 ppc64_elf_unhandled_reloc, /* special_function */
1184 "R_PPC64_GOT16_LO_DS", /* name */
1185 FALSE, /* partial_inplace */
1186 0, /* src_mask */
1187 0xfffc, /* dst_mask */
1188 FALSE), /* pcrel_offset */
1189
1190 /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
1191 HOWTO (R_PPC64_PLT16_LO_DS, /* type */
1192 0, /* rightshift */
1193 1, /* size (0 = byte, 1 = short, 2 = long) */
1194 16, /* bitsize */
1195 FALSE, /* pc_relative */
1196 0, /* bitpos */
1197 complain_overflow_dont, /* complain_on_overflow */
1198 ppc64_elf_unhandled_reloc, /* special_function */
1199 "R_PPC64_PLT16_LO_DS", /* name */
1200 FALSE, /* partial_inplace */
1201 0, /* src_mask */
1202 0xfffc, /* dst_mask */
1203 FALSE), /* pcrel_offset */
1204
1205 /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
1206 HOWTO (R_PPC64_SECTOFF_DS, /* type */
1207 0, /* rightshift */
1208 1, /* size (0 = byte, 1 = short, 2 = long) */
1209 16, /* bitsize */
1210 FALSE, /* pc_relative */
1211 0, /* bitpos */
1212 complain_overflow_signed, /* complain_on_overflow */
1213 ppc64_elf_sectoff_reloc, /* special_function */
1214 "R_PPC64_SECTOFF_DS", /* name */
1215 FALSE, /* partial_inplace */
1216 0, /* src_mask */
1217 0xfffc, /* dst_mask */
1218 FALSE), /* pcrel_offset */
1219
1220 /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
1221 HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */
1222 0, /* rightshift */
1223 1, /* size (0 = byte, 1 = short, 2 = long) */
1224 16, /* bitsize */
1225 FALSE, /* pc_relative */
1226 0, /* bitpos */
1227 complain_overflow_dont, /* complain_on_overflow */
1228 ppc64_elf_sectoff_reloc, /* special_function */
1229 "R_PPC64_SECTOFF_LO_DS",/* name */
1230 FALSE, /* partial_inplace */
1231 0, /* src_mask */
1232 0xfffc, /* dst_mask */
1233 FALSE), /* pcrel_offset */
1234
1235 /* Like R_PPC64_TOC16, but for instructions with a DS field. */
1236 HOWTO (R_PPC64_TOC16_DS, /* type */
1237 0, /* rightshift */
1238 1, /* size (0 = byte, 1 = short, 2 = long) */
1239 16, /* bitsize */
1240 FALSE, /* pc_relative */
1241 0, /* bitpos */
1242 complain_overflow_signed, /* complain_on_overflow */
1243 ppc64_elf_toc_reloc, /* special_function */
1244 "R_PPC64_TOC16_DS", /* name */
1245 FALSE, /* partial_inplace */
1246 0, /* src_mask */
1247 0xfffc, /* dst_mask */
1248 FALSE), /* pcrel_offset */
1249
1250 /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
1251 HOWTO (R_PPC64_TOC16_LO_DS, /* type */
1252 0, /* rightshift */
1253 1, /* size (0 = byte, 1 = short, 2 = long) */
1254 16, /* bitsize */
1255 FALSE, /* pc_relative */
1256 0, /* bitpos */
1257 complain_overflow_dont, /* complain_on_overflow */
1258 ppc64_elf_toc_reloc, /* special_function */
1259 "R_PPC64_TOC16_LO_DS", /* name */
1260 FALSE, /* partial_inplace */
1261 0, /* src_mask */
1262 0xfffc, /* dst_mask */
1263 FALSE), /* pcrel_offset */
1264
1265 /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
1266 /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
1267 HOWTO (R_PPC64_PLTGOT16_DS, /* type */
1268 0, /* rightshift */
1269 1, /* size (0 = byte, 1 = short, 2 = long) */
1270 16, /* bitsize */
1271 FALSE, /* pc_relative */
1272 0, /* bitpos */
1273 complain_overflow_signed, /* complain_on_overflow */
1274 ppc64_elf_unhandled_reloc, /* special_function */
1275 "R_PPC64_PLTGOT16_DS", /* name */
1276 FALSE, /* partial_inplace */
1277 0, /* src_mask */
1278 0xfffc, /* dst_mask */
1279 FALSE), /* pcrel_offset */
1280
1281 /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */
1282 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1283 HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */
1284 0, /* rightshift */
1285 1, /* size (0 = byte, 1 = short, 2 = long) */
1286 16, /* bitsize */
1287 FALSE, /* pc_relative */
1288 0, /* bitpos */
1289 complain_overflow_dont, /* complain_on_overflow */
1290 ppc64_elf_unhandled_reloc, /* special_function */
1291 "R_PPC64_PLTGOT16_LO_DS",/* name */
1292 FALSE, /* partial_inplace */
1293 0, /* src_mask */
1294 0xfffc, /* dst_mask */
1295 FALSE), /* pcrel_offset */
1296
1297 /* Marker relocs for TLS. */
1298 HOWTO (R_PPC64_TLS,
1299 0, /* rightshift */
1300 2, /* size (0 = byte, 1 = short, 2 = long) */
1301 32, /* bitsize */
1302 FALSE, /* pc_relative */
1303 0, /* bitpos */
1304 complain_overflow_dont, /* complain_on_overflow */
1305 bfd_elf_generic_reloc, /* special_function */
1306 "R_PPC64_TLS", /* name */
1307 FALSE, /* partial_inplace */
1308 0, /* src_mask */
1309 0, /* dst_mask */
1310 FALSE), /* pcrel_offset */
1311
1312 HOWTO (R_PPC64_TLSGD,
1313 0, /* rightshift */
1314 2, /* size (0 = byte, 1 = short, 2 = long) */
1315 32, /* bitsize */
1316 FALSE, /* pc_relative */
1317 0, /* bitpos */
1318 complain_overflow_dont, /* complain_on_overflow */
1319 bfd_elf_generic_reloc, /* special_function */
1320 "R_PPC64_TLSGD", /* name */
1321 FALSE, /* partial_inplace */
1322 0, /* src_mask */
1323 0, /* dst_mask */
1324 FALSE), /* pcrel_offset */
1325
1326 HOWTO (R_PPC64_TLSLD,
1327 0, /* rightshift */
1328 2, /* size (0 = byte, 1 = short, 2 = long) */
1329 32, /* bitsize */
1330 FALSE, /* pc_relative */
1331 0, /* bitpos */
1332 complain_overflow_dont, /* complain_on_overflow */
1333 bfd_elf_generic_reloc, /* special_function */
1334 "R_PPC64_TLSLD", /* name */
1335 FALSE, /* partial_inplace */
1336 0, /* src_mask */
1337 0, /* dst_mask */
1338 FALSE), /* pcrel_offset */
1339
1340 /* Marker reloc for optimizing r2 save in prologue rather than on
1341 each plt call stub. */
1342 HOWTO (R_PPC64_TOCSAVE,
1343 0, /* rightshift */
1344 2, /* size (0 = byte, 1 = short, 2 = long) */
1345 32, /* bitsize */
1346 FALSE, /* pc_relative */
1347 0, /* bitpos */
1348 complain_overflow_dont, /* complain_on_overflow */
1349 bfd_elf_generic_reloc, /* special_function */
1350 "R_PPC64_TOCSAVE", /* name */
1351 FALSE, /* partial_inplace */
1352 0, /* src_mask */
1353 0, /* dst_mask */
1354 FALSE), /* pcrel_offset */
1355
1356 /* Marker relocs on inline plt call instructions. */
1357 HOWTO (R_PPC64_PLTSEQ,
1358 0, /* rightshift */
1359 2, /* size (0 = byte, 1 = short, 2 = long) */
1360 32, /* bitsize */
1361 FALSE, /* pc_relative */
1362 0, /* bitpos */
1363 complain_overflow_dont, /* complain_on_overflow */
1364 bfd_elf_generic_reloc, /* special_function */
1365 "R_PPC64_PLTSEQ", /* name */
1366 FALSE, /* partial_inplace */
1367 0, /* src_mask */
1368 0, /* dst_mask */
1369 FALSE), /* pcrel_offset */
1370
1371 HOWTO (R_PPC64_PLTCALL,
1372 0, /* rightshift */
1373 2, /* size (0 = byte, 1 = short, 2 = long) */
1374 32, /* bitsize */
1375 FALSE, /* pc_relative */
1376 0, /* bitpos */
1377 complain_overflow_dont, /* complain_on_overflow */
1378 bfd_elf_generic_reloc, /* special_function */
1379 "R_PPC64_PLTCALL", /* name */
1380 FALSE, /* partial_inplace */
1381 0, /* src_mask */
1382 0, /* dst_mask */
1383 FALSE), /* pcrel_offset */
1384
1385 /* Computes the load module index of the load module that contains the
1386 definition of its TLS sym. */
1387 HOWTO (R_PPC64_DTPMOD64,
1388 0, /* rightshift */
1389 4, /* size (0 = byte, 1 = short, 2 = long) */
1390 64, /* bitsize */
1391 FALSE, /* pc_relative */
1392 0, /* bitpos */
1393 complain_overflow_dont, /* complain_on_overflow */
1394 ppc64_elf_unhandled_reloc, /* special_function */
1395 "R_PPC64_DTPMOD64", /* name */
1396 FALSE, /* partial_inplace */
1397 0, /* src_mask */
1398 ONES (64), /* dst_mask */
1399 FALSE), /* pcrel_offset */
1400
1401 /* Computes a dtv-relative displacement, the difference between the value
1402 of sym+add and the base address of the thread-local storage block that
1403 contains the definition of sym, minus 0x8000. */
1404 HOWTO (R_PPC64_DTPREL64,
1405 0, /* rightshift */
1406 4, /* size (0 = byte, 1 = short, 2 = long) */
1407 64, /* bitsize */
1408 FALSE, /* pc_relative */
1409 0, /* bitpos */
1410 complain_overflow_dont, /* complain_on_overflow */
1411 ppc64_elf_unhandled_reloc, /* special_function */
1412 "R_PPC64_DTPREL64", /* name */
1413 FALSE, /* partial_inplace */
1414 0, /* src_mask */
1415 ONES (64), /* dst_mask */
1416 FALSE), /* pcrel_offset */
1417
1418 /* A 16 bit dtprel reloc. */
1419 HOWTO (R_PPC64_DTPREL16,
1420 0, /* rightshift */
1421 1, /* size (0 = byte, 1 = short, 2 = long) */
1422 16, /* bitsize */
1423 FALSE, /* pc_relative */
1424 0, /* bitpos */
1425 complain_overflow_signed, /* complain_on_overflow */
1426 ppc64_elf_unhandled_reloc, /* special_function */
1427 "R_PPC64_DTPREL16", /* name */
1428 FALSE, /* partial_inplace */
1429 0, /* src_mask */
1430 0xffff, /* dst_mask */
1431 FALSE), /* pcrel_offset */
1432
1433 /* Like DTPREL16, but no overflow. */
1434 HOWTO (R_PPC64_DTPREL16_LO,
1435 0, /* rightshift */
1436 1, /* size (0 = byte, 1 = short, 2 = long) */
1437 16, /* bitsize */
1438 FALSE, /* pc_relative */
1439 0, /* bitpos */
1440 complain_overflow_dont, /* complain_on_overflow */
1441 ppc64_elf_unhandled_reloc, /* special_function */
1442 "R_PPC64_DTPREL16_LO", /* name */
1443 FALSE, /* partial_inplace */
1444 0, /* src_mask */
1445 0xffff, /* dst_mask */
1446 FALSE), /* pcrel_offset */
1447
1448 /* Like DTPREL16_LO, but next higher group of 16 bits. */
1449 HOWTO (R_PPC64_DTPREL16_HI,
1450 16, /* rightshift */
1451 1, /* size (0 = byte, 1 = short, 2 = long) */
1452 16, /* bitsize */
1453 FALSE, /* pc_relative */
1454 0, /* bitpos */
1455 complain_overflow_signed, /* complain_on_overflow */
1456 ppc64_elf_unhandled_reloc, /* special_function */
1457 "R_PPC64_DTPREL16_HI", /* name */
1458 FALSE, /* partial_inplace */
1459 0, /* src_mask */
1460 0xffff, /* dst_mask */
1461 FALSE), /* pcrel_offset */
1462
1463 /* Like DTPREL16_HI, but adjust for low 16 bits. */
1464 HOWTO (R_PPC64_DTPREL16_HA,
1465 16, /* rightshift */
1466 1, /* size (0 = byte, 1 = short, 2 = long) */
1467 16, /* bitsize */
1468 FALSE, /* pc_relative */
1469 0, /* bitpos */
1470 complain_overflow_signed, /* complain_on_overflow */
1471 ppc64_elf_unhandled_reloc, /* special_function */
1472 "R_PPC64_DTPREL16_HA", /* name */
1473 FALSE, /* partial_inplace */
1474 0, /* src_mask */
1475 0xffff, /* dst_mask */
1476 FALSE), /* pcrel_offset */
1477
1478 /* Like DTPREL16_HI, but next higher group of 16 bits. */
1479 HOWTO (R_PPC64_DTPREL16_HIGHER,
1480 32, /* rightshift */
1481 1, /* size (0 = byte, 1 = short, 2 = long) */
1482 16, /* bitsize */
1483 FALSE, /* pc_relative */
1484 0, /* bitpos */
1485 complain_overflow_dont, /* complain_on_overflow */
1486 ppc64_elf_unhandled_reloc, /* special_function */
1487 "R_PPC64_DTPREL16_HIGHER", /* name */
1488 FALSE, /* partial_inplace */
1489 0, /* src_mask */
1490 0xffff, /* dst_mask */
1491 FALSE), /* pcrel_offset */
1492
1493 /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */
1494 HOWTO (R_PPC64_DTPREL16_HIGHERA,
1495 32, /* rightshift */
1496 1, /* size (0 = byte, 1 = short, 2 = long) */
1497 16, /* bitsize */
1498 FALSE, /* pc_relative */
1499 0, /* bitpos */
1500 complain_overflow_dont, /* complain_on_overflow */
1501 ppc64_elf_unhandled_reloc, /* special_function */
1502 "R_PPC64_DTPREL16_HIGHERA", /* name */
1503 FALSE, /* partial_inplace */
1504 0, /* src_mask */
1505 0xffff, /* dst_mask */
1506 FALSE), /* pcrel_offset */
1507
1508 /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */
1509 HOWTO (R_PPC64_DTPREL16_HIGHEST,
1510 48, /* rightshift */
1511 1, /* size (0 = byte, 1 = short, 2 = long) */
1512 16, /* bitsize */
1513 FALSE, /* pc_relative */
1514 0, /* bitpos */
1515 complain_overflow_dont, /* complain_on_overflow */
1516 ppc64_elf_unhandled_reloc, /* special_function */
1517 "R_PPC64_DTPREL16_HIGHEST", /* name */
1518 FALSE, /* partial_inplace */
1519 0, /* src_mask */
1520 0xffff, /* dst_mask */
1521 FALSE), /* pcrel_offset */
1522
1523 /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */
1524 HOWTO (R_PPC64_DTPREL16_HIGHESTA,
1525 48, /* rightshift */
1526 1, /* size (0 = byte, 1 = short, 2 = long) */
1527 16, /* bitsize */
1528 FALSE, /* pc_relative */
1529 0, /* bitpos */
1530 complain_overflow_dont, /* complain_on_overflow */
1531 ppc64_elf_unhandled_reloc, /* special_function */
1532 "R_PPC64_DTPREL16_HIGHESTA", /* name */
1533 FALSE, /* partial_inplace */
1534 0, /* src_mask */
1535 0xffff, /* dst_mask */
1536 FALSE), /* pcrel_offset */
1537
1538 /* Like DTPREL16, but for insns with a DS field. */
1539 HOWTO (R_PPC64_DTPREL16_DS,
1540 0, /* rightshift */
1541 1, /* size (0 = byte, 1 = short, 2 = long) */
1542 16, /* bitsize */
1543 FALSE, /* pc_relative */
1544 0, /* bitpos */
1545 complain_overflow_signed, /* complain_on_overflow */
1546 ppc64_elf_unhandled_reloc, /* special_function */
1547 "R_PPC64_DTPREL16_DS", /* name */
1548 FALSE, /* partial_inplace */
1549 0, /* src_mask */
1550 0xfffc, /* dst_mask */
1551 FALSE), /* pcrel_offset */
1552
1553 /* Like DTPREL16_DS, but no overflow. */
1554 HOWTO (R_PPC64_DTPREL16_LO_DS,
1555 0, /* rightshift */
1556 1, /* size (0 = byte, 1 = short, 2 = long) */
1557 16, /* bitsize */
1558 FALSE, /* pc_relative */
1559 0, /* bitpos */
1560 complain_overflow_dont, /* complain_on_overflow */
1561 ppc64_elf_unhandled_reloc, /* special_function */
1562 "R_PPC64_DTPREL16_LO_DS", /* name */
1563 FALSE, /* partial_inplace */
1564 0, /* src_mask */
1565 0xfffc, /* dst_mask */
1566 FALSE), /* pcrel_offset */
1567
1568 /* Computes a tp-relative displacement, the difference between the value of
1569 sym+add and the value of the thread pointer (r13). */
1570 HOWTO (R_PPC64_TPREL64,
1571 0, /* rightshift */
1572 4, /* size (0 = byte, 1 = short, 2 = long) */
1573 64, /* bitsize */
1574 FALSE, /* pc_relative */
1575 0, /* bitpos */
1576 complain_overflow_dont, /* complain_on_overflow */
1577 ppc64_elf_unhandled_reloc, /* special_function */
1578 "R_PPC64_TPREL64", /* name */
1579 FALSE, /* partial_inplace */
1580 0, /* src_mask */
1581 ONES (64), /* dst_mask */
1582 FALSE), /* pcrel_offset */
1583
1584 /* A 16 bit tprel reloc. */
1585 HOWTO (R_PPC64_TPREL16,
1586 0, /* rightshift */
1587 1, /* size (0 = byte, 1 = short, 2 = long) */
1588 16, /* bitsize */
1589 FALSE, /* pc_relative */
1590 0, /* bitpos */
1591 complain_overflow_signed, /* complain_on_overflow */
1592 ppc64_elf_unhandled_reloc, /* special_function */
1593 "R_PPC64_TPREL16", /* name */
1594 FALSE, /* partial_inplace */
1595 0, /* src_mask */
1596 0xffff, /* dst_mask */
1597 FALSE), /* pcrel_offset */
1598
1599 /* Like TPREL16, but no overflow. */
1600 HOWTO (R_PPC64_TPREL16_LO,
1601 0, /* rightshift */
1602 1, /* size (0 = byte, 1 = short, 2 = long) */
1603 16, /* bitsize */
1604 FALSE, /* pc_relative */
1605 0, /* bitpos */
1606 complain_overflow_dont, /* complain_on_overflow */
1607 ppc64_elf_unhandled_reloc, /* special_function */
1608 "R_PPC64_TPREL16_LO", /* name */
1609 FALSE, /* partial_inplace */
1610 0, /* src_mask */
1611 0xffff, /* dst_mask */
1612 FALSE), /* pcrel_offset */
1613
1614 /* Like TPREL16_LO, but next higher group of 16 bits. */
1615 HOWTO (R_PPC64_TPREL16_HI,
1616 16, /* rightshift */
1617 1, /* size (0 = byte, 1 = short, 2 = long) */
1618 16, /* bitsize */
1619 FALSE, /* pc_relative */
1620 0, /* bitpos */
1621 complain_overflow_signed, /* complain_on_overflow */
1622 ppc64_elf_unhandled_reloc, /* special_function */
1623 "R_PPC64_TPREL16_HI", /* name */
1624 FALSE, /* partial_inplace */
1625 0, /* src_mask */
1626 0xffff, /* dst_mask */
1627 FALSE), /* pcrel_offset */
1628
1629 /* Like TPREL16_HI, but adjust for low 16 bits. */
1630 HOWTO (R_PPC64_TPREL16_HA,
1631 16, /* rightshift */
1632 1, /* size (0 = byte, 1 = short, 2 = long) */
1633 16, /* bitsize */
1634 FALSE, /* pc_relative */
1635 0, /* bitpos */
1636 complain_overflow_signed, /* complain_on_overflow */
1637 ppc64_elf_unhandled_reloc, /* special_function */
1638 "R_PPC64_TPREL16_HA", /* name */
1639 FALSE, /* partial_inplace */
1640 0, /* src_mask */
1641 0xffff, /* dst_mask */
1642 FALSE), /* pcrel_offset */
1643
1644 /* Like TPREL16_HI, but next higher group of 16 bits. */
1645 HOWTO (R_PPC64_TPREL16_HIGHER,
1646 32, /* rightshift */
1647 1, /* size (0 = byte, 1 = short, 2 = long) */
1648 16, /* bitsize */
1649 FALSE, /* pc_relative */
1650 0, /* bitpos */
1651 complain_overflow_dont, /* complain_on_overflow */
1652 ppc64_elf_unhandled_reloc, /* special_function */
1653 "R_PPC64_TPREL16_HIGHER", /* name */
1654 FALSE, /* partial_inplace */
1655 0, /* src_mask */
1656 0xffff, /* dst_mask */
1657 FALSE), /* pcrel_offset */
1658
1659 /* Like TPREL16_HIGHER, but adjust for low 16 bits. */
1660 HOWTO (R_PPC64_TPREL16_HIGHERA,
1661 32, /* rightshift */
1662 1, /* size (0 = byte, 1 = short, 2 = long) */
1663 16, /* bitsize */
1664 FALSE, /* pc_relative */
1665 0, /* bitpos */
1666 complain_overflow_dont, /* complain_on_overflow */
1667 ppc64_elf_unhandled_reloc, /* special_function */
1668 "R_PPC64_TPREL16_HIGHERA", /* name */
1669 FALSE, /* partial_inplace */
1670 0, /* src_mask */
1671 0xffff, /* dst_mask */
1672 FALSE), /* pcrel_offset */
1673
1674 /* Like TPREL16_HIGHER, but next higher group of 16 bits. */
1675 HOWTO (R_PPC64_TPREL16_HIGHEST,
1676 48, /* rightshift */
1677 1, /* size (0 = byte, 1 = short, 2 = long) */
1678 16, /* bitsize */
1679 FALSE, /* pc_relative */
1680 0, /* bitpos */
1681 complain_overflow_dont, /* complain_on_overflow */
1682 ppc64_elf_unhandled_reloc, /* special_function */
1683 "R_PPC64_TPREL16_HIGHEST", /* name */
1684 FALSE, /* partial_inplace */
1685 0, /* src_mask */
1686 0xffff, /* dst_mask */
1687 FALSE), /* pcrel_offset */
1688
1689 /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */
1690 HOWTO (R_PPC64_TPREL16_HIGHESTA,
1691 48, /* rightshift */
1692 1, /* size (0 = byte, 1 = short, 2 = long) */
1693 16, /* bitsize */
1694 FALSE, /* pc_relative */
1695 0, /* bitpos */
1696 complain_overflow_dont, /* complain_on_overflow */
1697 ppc64_elf_unhandled_reloc, /* special_function */
1698 "R_PPC64_TPREL16_HIGHESTA", /* name */
1699 FALSE, /* partial_inplace */
1700 0, /* src_mask */
1701 0xffff, /* dst_mask */
1702 FALSE), /* pcrel_offset */
1703
1704 /* Like TPREL16, but for insns with a DS field. */
1705 HOWTO (R_PPC64_TPREL16_DS,
1706 0, /* rightshift */
1707 1, /* size (0 = byte, 1 = short, 2 = long) */
1708 16, /* bitsize */
1709 FALSE, /* pc_relative */
1710 0, /* bitpos */
1711 complain_overflow_signed, /* complain_on_overflow */
1712 ppc64_elf_unhandled_reloc, /* special_function */
1713 "R_PPC64_TPREL16_DS", /* name */
1714 FALSE, /* partial_inplace */
1715 0, /* src_mask */
1716 0xfffc, /* dst_mask */
1717 FALSE), /* pcrel_offset */
1718
1719 /* Like TPREL16_DS, but no overflow. */
1720 HOWTO (R_PPC64_TPREL16_LO_DS,
1721 0, /* rightshift */
1722 1, /* size (0 = byte, 1 = short, 2 = long) */
1723 16, /* bitsize */
1724 FALSE, /* pc_relative */
1725 0, /* bitpos */
1726 complain_overflow_dont, /* complain_on_overflow */
1727 ppc64_elf_unhandled_reloc, /* special_function */
1728 "R_PPC64_TPREL16_LO_DS", /* name */
1729 FALSE, /* partial_inplace */
1730 0, /* src_mask */
1731 0xfffc, /* dst_mask */
1732 FALSE), /* pcrel_offset */
1733
1734 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1735 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1736 to the first entry relative to the TOC base (r2). */
1737 HOWTO (R_PPC64_GOT_TLSGD16,
1738 0, /* rightshift */
1739 1, /* size (0 = byte, 1 = short, 2 = long) */
1740 16, /* bitsize */
1741 FALSE, /* pc_relative */
1742 0, /* bitpos */
1743 complain_overflow_signed, /* complain_on_overflow */
1744 ppc64_elf_unhandled_reloc, /* special_function */
1745 "R_PPC64_GOT_TLSGD16", /* name */
1746 FALSE, /* partial_inplace */
1747 0, /* src_mask */
1748 0xffff, /* dst_mask */
1749 FALSE), /* pcrel_offset */
1750
1751 /* Like GOT_TLSGD16, but no overflow. */
1752 HOWTO (R_PPC64_GOT_TLSGD16_LO,
1753 0, /* rightshift */
1754 1, /* size (0 = byte, 1 = short, 2 = long) */
1755 16, /* bitsize */
1756 FALSE, /* pc_relative */
1757 0, /* bitpos */
1758 complain_overflow_dont, /* complain_on_overflow */
1759 ppc64_elf_unhandled_reloc, /* special_function */
1760 "R_PPC64_GOT_TLSGD16_LO", /* name */
1761 FALSE, /* partial_inplace */
1762 0, /* src_mask */
1763 0xffff, /* dst_mask */
1764 FALSE), /* pcrel_offset */
1765
1766 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1767 HOWTO (R_PPC64_GOT_TLSGD16_HI,
1768 16, /* rightshift */
1769 1, /* size (0 = byte, 1 = short, 2 = long) */
1770 16, /* bitsize */
1771 FALSE, /* pc_relative */
1772 0, /* bitpos */
1773 complain_overflow_signed, /* complain_on_overflow */
1774 ppc64_elf_unhandled_reloc, /* special_function */
1775 "R_PPC64_GOT_TLSGD16_HI", /* name */
1776 FALSE, /* partial_inplace */
1777 0, /* src_mask */
1778 0xffff, /* dst_mask */
1779 FALSE), /* pcrel_offset */
1780
1781 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1782 HOWTO (R_PPC64_GOT_TLSGD16_HA,
1783 16, /* rightshift */
1784 1, /* size (0 = byte, 1 = short, 2 = long) */
1785 16, /* bitsize */
1786 FALSE, /* pc_relative */
1787 0, /* bitpos */
1788 complain_overflow_signed, /* complain_on_overflow */
1789 ppc64_elf_unhandled_reloc, /* special_function */
1790 "R_PPC64_GOT_TLSGD16_HA", /* name */
1791 FALSE, /* partial_inplace */
1792 0, /* src_mask */
1793 0xffff, /* dst_mask */
1794 FALSE), /* pcrel_offset */
1795
1796 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1797 with values (sym+add)@dtpmod and zero, and computes the offset to the
1798 first entry relative to the TOC base (r2). */
1799 HOWTO (R_PPC64_GOT_TLSLD16,
1800 0, /* rightshift */
1801 1, /* size (0 = byte, 1 = short, 2 = long) */
1802 16, /* bitsize */
1803 FALSE, /* pc_relative */
1804 0, /* bitpos */
1805 complain_overflow_signed, /* complain_on_overflow */
1806 ppc64_elf_unhandled_reloc, /* special_function */
1807 "R_PPC64_GOT_TLSLD16", /* name */
1808 FALSE, /* partial_inplace */
1809 0, /* src_mask */
1810 0xffff, /* dst_mask */
1811 FALSE), /* pcrel_offset */
1812
1813 /* Like GOT_TLSLD16, but no overflow. */
1814 HOWTO (R_PPC64_GOT_TLSLD16_LO,
1815 0, /* rightshift */
1816 1, /* size (0 = byte, 1 = short, 2 = long) */
1817 16, /* bitsize */
1818 FALSE, /* pc_relative */
1819 0, /* bitpos */
1820 complain_overflow_dont, /* complain_on_overflow */
1821 ppc64_elf_unhandled_reloc, /* special_function */
1822 "R_PPC64_GOT_TLSLD16_LO", /* name */
1823 FALSE, /* partial_inplace */
1824 0, /* src_mask */
1825 0xffff, /* dst_mask */
1826 FALSE), /* pcrel_offset */
1827
1828 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1829 HOWTO (R_PPC64_GOT_TLSLD16_HI,
1830 16, /* rightshift */
1831 1, /* size (0 = byte, 1 = short, 2 = long) */
1832 16, /* bitsize */
1833 FALSE, /* pc_relative */
1834 0, /* bitpos */
1835 complain_overflow_signed, /* complain_on_overflow */
1836 ppc64_elf_unhandled_reloc, /* special_function */
1837 "R_PPC64_GOT_TLSLD16_HI", /* name */
1838 FALSE, /* partial_inplace */
1839 0, /* src_mask */
1840 0xffff, /* dst_mask */
1841 FALSE), /* pcrel_offset */
1842
1843 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1844 HOWTO (R_PPC64_GOT_TLSLD16_HA,
1845 16, /* rightshift */
1846 1, /* size (0 = byte, 1 = short, 2 = long) */
1847 16, /* bitsize */
1848 FALSE, /* pc_relative */
1849 0, /* bitpos */
1850 complain_overflow_signed, /* complain_on_overflow */
1851 ppc64_elf_unhandled_reloc, /* special_function */
1852 "R_PPC64_GOT_TLSLD16_HA", /* name */
1853 FALSE, /* partial_inplace */
1854 0, /* src_mask */
1855 0xffff, /* dst_mask */
1856 FALSE), /* pcrel_offset */
1857
1858 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1859 the offset to the entry relative to the TOC base (r2). */
1860 HOWTO (R_PPC64_GOT_DTPREL16_DS,
1861 0, /* rightshift */
1862 1, /* size (0 = byte, 1 = short, 2 = long) */
1863 16, /* bitsize */
1864 FALSE, /* pc_relative */
1865 0, /* bitpos */
1866 complain_overflow_signed, /* complain_on_overflow */
1867 ppc64_elf_unhandled_reloc, /* special_function */
1868 "R_PPC64_GOT_DTPREL16_DS", /* name */
1869 FALSE, /* partial_inplace */
1870 0, /* src_mask */
1871 0xfffc, /* dst_mask */
1872 FALSE), /* pcrel_offset */
1873
1874 /* Like GOT_DTPREL16_DS, but no overflow. */
1875 HOWTO (R_PPC64_GOT_DTPREL16_LO_DS,
1876 0, /* rightshift */
1877 1, /* size (0 = byte, 1 = short, 2 = long) */
1878 16, /* bitsize */
1879 FALSE, /* pc_relative */
1880 0, /* bitpos */
1881 complain_overflow_dont, /* complain_on_overflow */
1882 ppc64_elf_unhandled_reloc, /* special_function */
1883 "R_PPC64_GOT_DTPREL16_LO_DS", /* name */
1884 FALSE, /* partial_inplace */
1885 0, /* src_mask */
1886 0xfffc, /* dst_mask */
1887 FALSE), /* pcrel_offset */
1888
1889 /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */
1890 HOWTO (R_PPC64_GOT_DTPREL16_HI,
1891 16, /* rightshift */
1892 1, /* size (0 = byte, 1 = short, 2 = long) */
1893 16, /* bitsize */
1894 FALSE, /* pc_relative */
1895 0, /* bitpos */
1896 complain_overflow_signed, /* complain_on_overflow */
1897 ppc64_elf_unhandled_reloc, /* special_function */
1898 "R_PPC64_GOT_DTPREL16_HI", /* name */
1899 FALSE, /* partial_inplace */
1900 0, /* src_mask */
1901 0xffff, /* dst_mask */
1902 FALSE), /* pcrel_offset */
1903
1904 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1905 HOWTO (R_PPC64_GOT_DTPREL16_HA,
1906 16, /* rightshift */
1907 1, /* size (0 = byte, 1 = short, 2 = long) */
1908 16, /* bitsize */
1909 FALSE, /* pc_relative */
1910 0, /* bitpos */
1911 complain_overflow_signed, /* complain_on_overflow */
1912 ppc64_elf_unhandled_reloc, /* special_function */
1913 "R_PPC64_GOT_DTPREL16_HA", /* name */
1914 FALSE, /* partial_inplace */
1915 0, /* src_mask */
1916 0xffff, /* dst_mask */
1917 FALSE), /* pcrel_offset */
1918
1919 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1920 offset to the entry relative to the TOC base (r2). */
1921 HOWTO (R_PPC64_GOT_TPREL16_DS,
1922 0, /* rightshift */
1923 1, /* size (0 = byte, 1 = short, 2 = long) */
1924 16, /* bitsize */
1925 FALSE, /* pc_relative */
1926 0, /* bitpos */
1927 complain_overflow_signed, /* complain_on_overflow */
1928 ppc64_elf_unhandled_reloc, /* special_function */
1929 "R_PPC64_GOT_TPREL16_DS", /* name */
1930 FALSE, /* partial_inplace */
1931 0, /* src_mask */
1932 0xfffc, /* dst_mask */
1933 FALSE), /* pcrel_offset */
1934
1935 /* Like GOT_TPREL16_DS, but no overflow. */
1936 HOWTO (R_PPC64_GOT_TPREL16_LO_DS,
1937 0, /* rightshift */
1938 1, /* size (0 = byte, 1 = short, 2 = long) */
1939 16, /* bitsize */
1940 FALSE, /* pc_relative */
1941 0, /* bitpos */
1942 complain_overflow_dont, /* complain_on_overflow */
1943 ppc64_elf_unhandled_reloc, /* special_function */
1944 "R_PPC64_GOT_TPREL16_LO_DS", /* name */
1945 FALSE, /* partial_inplace */
1946 0, /* src_mask */
1947 0xfffc, /* dst_mask */
1948 FALSE), /* pcrel_offset */
1949
1950 /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */
1951 HOWTO (R_PPC64_GOT_TPREL16_HI,
1952 16, /* rightshift */
1953 1, /* size (0 = byte, 1 = short, 2 = long) */
1954 16, /* bitsize */
1955 FALSE, /* pc_relative */
1956 0, /* bitpos */
1957 complain_overflow_signed, /* complain_on_overflow */
1958 ppc64_elf_unhandled_reloc, /* special_function */
1959 "R_PPC64_GOT_TPREL16_HI", /* name */
1960 FALSE, /* partial_inplace */
1961 0, /* src_mask */
1962 0xffff, /* dst_mask */
1963 FALSE), /* pcrel_offset */
1964
1965 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1966 HOWTO (R_PPC64_GOT_TPREL16_HA,
1967 16, /* rightshift */
1968 1, /* size (0 = byte, 1 = short, 2 = long) */
1969 16, /* bitsize */
1970 FALSE, /* pc_relative */
1971 0, /* bitpos */
1972 complain_overflow_signed, /* complain_on_overflow */
1973 ppc64_elf_unhandled_reloc, /* special_function */
1974 "R_PPC64_GOT_TPREL16_HA", /* name */
1975 FALSE, /* partial_inplace */
1976 0, /* src_mask */
1977 0xffff, /* dst_mask */
1978 FALSE), /* pcrel_offset */
1979
1980 HOWTO (R_PPC64_JMP_IREL, /* type */
1981 0, /* rightshift */
1982 0, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1983 0, /* bitsize */
1984 FALSE, /* pc_relative */
1985 0, /* bitpos */
1986 complain_overflow_dont, /* complain_on_overflow */
1987 ppc64_elf_unhandled_reloc, /* special_function */
1988 "R_PPC64_JMP_IREL", /* name */
1989 FALSE, /* partial_inplace */
1990 0, /* src_mask */
1991 0, /* dst_mask */
1992 FALSE), /* pcrel_offset */
1993
1994 HOWTO (R_PPC64_IRELATIVE, /* type */
1995 0, /* rightshift */
1996 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1997 64, /* bitsize */
1998 FALSE, /* pc_relative */
1999 0, /* bitpos */
2000 complain_overflow_dont, /* complain_on_overflow */
2001 bfd_elf_generic_reloc, /* special_function */
2002 "R_PPC64_IRELATIVE", /* name */
2003 FALSE, /* partial_inplace */
2004 0, /* src_mask */
2005 ONES (64), /* dst_mask */
2006 FALSE), /* pcrel_offset */
2007
2008 /* A 16 bit relative relocation. */
2009 HOWTO (R_PPC64_REL16, /* type */
2010 0, /* rightshift */
2011 1, /* size (0 = byte, 1 = short, 2 = long) */
2012 16, /* bitsize */
2013 TRUE, /* pc_relative */
2014 0, /* bitpos */
2015 complain_overflow_signed, /* complain_on_overflow */
2016 bfd_elf_generic_reloc, /* special_function */
2017 "R_PPC64_REL16", /* name */
2018 FALSE, /* partial_inplace */
2019 0, /* src_mask */
2020 0xffff, /* dst_mask */
2021 TRUE), /* pcrel_offset */
2022
2023 /* A 16 bit relative relocation without overflow. */
2024 HOWTO (R_PPC64_REL16_LO, /* type */
2025 0, /* rightshift */
2026 1, /* size (0 = byte, 1 = short, 2 = long) */
2027 16, /* bitsize */
2028 TRUE, /* pc_relative */
2029 0, /* bitpos */
2030 complain_overflow_dont,/* complain_on_overflow */
2031 bfd_elf_generic_reloc, /* special_function */
2032 "R_PPC64_REL16_LO", /* name */
2033 FALSE, /* partial_inplace */
2034 0, /* src_mask */
2035 0xffff, /* dst_mask */
2036 TRUE), /* pcrel_offset */
2037
2038 /* The high order 16 bits of a relative address. */
2039 HOWTO (R_PPC64_REL16_HI, /* type */
2040 16, /* rightshift */
2041 1, /* size (0 = byte, 1 = short, 2 = long) */
2042 16, /* bitsize */
2043 TRUE, /* pc_relative */
2044 0, /* bitpos */
2045 complain_overflow_signed, /* complain_on_overflow */
2046 bfd_elf_generic_reloc, /* special_function */
2047 "R_PPC64_REL16_HI", /* name */
2048 FALSE, /* partial_inplace */
2049 0, /* src_mask */
2050 0xffff, /* dst_mask */
2051 TRUE), /* pcrel_offset */
2052
2053 /* The high order 16 bits of a relative address, plus 1 if the contents of
2054 the low 16 bits, treated as a signed number, is negative. */
2055 HOWTO (R_PPC64_REL16_HA, /* type */
2056 16, /* rightshift */
2057 1, /* size (0 = byte, 1 = short, 2 = long) */
2058 16, /* bitsize */
2059 TRUE, /* pc_relative */
2060 0, /* bitpos */
2061 complain_overflow_signed, /* complain_on_overflow */
2062 ppc64_elf_ha_reloc, /* special_function */
2063 "R_PPC64_REL16_HA", /* name */
2064 FALSE, /* partial_inplace */
2065 0, /* src_mask */
2066 0xffff, /* dst_mask */
2067 TRUE), /* pcrel_offset */
2068
2069 /* Like R_PPC64_REL16_HA but for split field in addpcis. */
2070 HOWTO (R_PPC64_REL16DX_HA, /* type */
2071 16, /* rightshift */
2072 2, /* size (0 = byte, 1 = short, 2 = long) */
2073 16, /* bitsize */
2074 TRUE, /* pc_relative */
2075 0, /* bitpos */
2076 complain_overflow_signed, /* complain_on_overflow */
2077 ppc64_elf_ha_reloc, /* special_function */
2078 "R_PPC64_REL16DX_HA", /* name */
2079 FALSE, /* partial_inplace */
2080 0, /* src_mask */
2081 0x1fffc1, /* dst_mask */
2082 TRUE), /* pcrel_offset */
2083
2084 /* A split-field reloc for addpcis, non-relative (gas internal use only). */
2085 HOWTO (R_PPC64_16DX_HA, /* type */
2086 16, /* rightshift */
2087 2, /* size (0 = byte, 1 = short, 2 = long) */
2088 16, /* bitsize */
2089 FALSE, /* pc_relative */
2090 0, /* bitpos */
2091 complain_overflow_signed, /* complain_on_overflow */
2092 ppc64_elf_ha_reloc, /* special_function */
2093 "R_PPC64_16DX_HA", /* name */
2094 FALSE, /* partial_inplace */
2095 0, /* src_mask */
2096 0x1fffc1, /* dst_mask */
2097 FALSE), /* pcrel_offset */
2098
2099 /* Like R_PPC64_ADDR16_HI, but no overflow. */
2100 HOWTO (R_PPC64_ADDR16_HIGH, /* type */
2101 16, /* rightshift */
2102 1, /* size (0 = byte, 1 = short, 2 = long) */
2103 16, /* bitsize */
2104 FALSE, /* pc_relative */
2105 0, /* bitpos */
2106 complain_overflow_dont, /* complain_on_overflow */
2107 bfd_elf_generic_reloc, /* special_function */
2108 "R_PPC64_ADDR16_HIGH", /* name */
2109 FALSE, /* partial_inplace */
2110 0, /* src_mask */
2111 0xffff, /* dst_mask */
2112 FALSE), /* pcrel_offset */
2113
2114 /* Like R_PPC64_ADDR16_HA, but no overflow. */
2115 HOWTO (R_PPC64_ADDR16_HIGHA, /* type */
2116 16, /* rightshift */
2117 1, /* size (0 = byte, 1 = short, 2 = long) */
2118 16, /* bitsize */
2119 FALSE, /* pc_relative */
2120 0, /* bitpos */
2121 complain_overflow_dont, /* complain_on_overflow */
2122 ppc64_elf_ha_reloc, /* special_function */
2123 "R_PPC64_ADDR16_HIGHA", /* name */
2124 FALSE, /* partial_inplace */
2125 0, /* src_mask */
2126 0xffff, /* dst_mask */
2127 FALSE), /* pcrel_offset */
2128
2129 /* Like R_PPC64_DTPREL16_HI, but no overflow. */
2130 HOWTO (R_PPC64_DTPREL16_HIGH,
2131 16, /* rightshift */
2132 1, /* size (0 = byte, 1 = short, 2 = long) */
2133 16, /* bitsize */
2134 FALSE, /* pc_relative */
2135 0, /* bitpos */
2136 complain_overflow_dont, /* complain_on_overflow */
2137 ppc64_elf_unhandled_reloc, /* special_function */
2138 "R_PPC64_DTPREL16_HIGH", /* name */
2139 FALSE, /* partial_inplace */
2140 0, /* src_mask */
2141 0xffff, /* dst_mask */
2142 FALSE), /* pcrel_offset */
2143
2144 /* Like R_PPC64_DTPREL16_HA, but no overflow. */
2145 HOWTO (R_PPC64_DTPREL16_HIGHA,
2146 16, /* rightshift */
2147 1, /* size (0 = byte, 1 = short, 2 = long) */
2148 16, /* bitsize */
2149 FALSE, /* pc_relative */
2150 0, /* bitpos */
2151 complain_overflow_dont, /* complain_on_overflow */
2152 ppc64_elf_unhandled_reloc, /* special_function */
2153 "R_PPC64_DTPREL16_HIGHA", /* name */
2154 FALSE, /* partial_inplace */
2155 0, /* src_mask */
2156 0xffff, /* dst_mask */
2157 FALSE), /* pcrel_offset */
2158
2159 /* Like R_PPC64_TPREL16_HI, but no overflow. */
2160 HOWTO (R_PPC64_TPREL16_HIGH,
2161 16, /* rightshift */
2162 1, /* size (0 = byte, 1 = short, 2 = long) */
2163 16, /* bitsize */
2164 FALSE, /* pc_relative */
2165 0, /* bitpos */
2166 complain_overflow_dont, /* complain_on_overflow */
2167 ppc64_elf_unhandled_reloc, /* special_function */
2168 "R_PPC64_TPREL16_HIGH", /* name */
2169 FALSE, /* partial_inplace */
2170 0, /* src_mask */
2171 0xffff, /* dst_mask */
2172 FALSE), /* pcrel_offset */
2173
2174 /* Like R_PPC64_TPREL16_HA, but no overflow. */
2175 HOWTO (R_PPC64_TPREL16_HIGHA,
2176 16, /* rightshift */
2177 1, /* size (0 = byte, 1 = short, 2 = long) */
2178 16, /* bitsize */
2179 FALSE, /* pc_relative */
2180 0, /* bitpos */
2181 complain_overflow_dont, /* complain_on_overflow */
2182 ppc64_elf_unhandled_reloc, /* special_function */
2183 "R_PPC64_TPREL16_HIGHA", /* name */
2184 FALSE, /* partial_inplace */
2185 0, /* src_mask */
2186 0xffff, /* dst_mask */
2187 FALSE), /* pcrel_offset */
2188
2189 /* Marker reloc on ELFv2 large-model function entry. */
2190 HOWTO (R_PPC64_ENTRY,
2191 0, /* rightshift */
2192 2, /* size (0 = byte, 1 = short, 2 = long) */
2193 32, /* bitsize */
2194 FALSE, /* pc_relative */
2195 0, /* bitpos */
2196 complain_overflow_dont, /* complain_on_overflow */
2197 bfd_elf_generic_reloc, /* special_function */
2198 "R_PPC64_ENTRY", /* name */
2199 FALSE, /* partial_inplace */
2200 0, /* src_mask */
2201 0, /* dst_mask */
2202 FALSE), /* pcrel_offset */
2203
2204 /* Like ADDR64, but use local entry point of function. */
2205 HOWTO (R_PPC64_ADDR64_LOCAL, /* type */
2206 0, /* rightshift */
2207 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
2208 64, /* bitsize */
2209 FALSE, /* pc_relative */
2210 0, /* bitpos */
2211 complain_overflow_dont, /* complain_on_overflow */
2212 bfd_elf_generic_reloc, /* special_function */
2213 "R_PPC64_ADDR64_LOCAL", /* name */
2214 FALSE, /* partial_inplace */
2215 0, /* src_mask */
2216 ONES (64), /* dst_mask */
2217 FALSE), /* pcrel_offset */
2218
2219 /* GNU extension to record C++ vtable hierarchy. */
2220 HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
2221 0, /* rightshift */
2222 0, /* size (0 = byte, 1 = short, 2 = long) */
2223 0, /* bitsize */
2224 FALSE, /* pc_relative */
2225 0, /* bitpos */
2226 complain_overflow_dont, /* complain_on_overflow */
2227 NULL, /* special_function */
2228 "R_PPC64_GNU_VTINHERIT", /* name */
2229 FALSE, /* partial_inplace */
2230 0, /* src_mask */
2231 0, /* dst_mask */
2232 FALSE), /* pcrel_offset */
2233
2234 /* GNU extension to record C++ vtable member usage. */
2235 HOWTO (R_PPC64_GNU_VTENTRY, /* type */
2236 0, /* rightshift */
2237 0, /* size (0 = byte, 1 = short, 2 = long) */
2238 0, /* bitsize */
2239 FALSE, /* pc_relative */
2240 0, /* bitpos */
2241 complain_overflow_dont, /* complain_on_overflow */
2242 NULL, /* special_function */
2243 "R_PPC64_GNU_VTENTRY", /* name */
2244 FALSE, /* partial_inplace */
2245 0, /* src_mask */
2246 0, /* dst_mask */
2247 FALSE), /* pcrel_offset */
2248 };
2249
2250 \f
2251 /* Initialize the ppc64_elf_howto_table, so that linear accesses can
2252 be done. */
2253
2254 static void
2255 ppc_howto_init (void)
2256 {
2257 unsigned int i, type;
2258
2259 for (i = 0; i < ARRAY_SIZE (ppc64_elf_howto_raw); i++)
2260 {
2261 type = ppc64_elf_howto_raw[i].type;
2262 BFD_ASSERT (type < ARRAY_SIZE (ppc64_elf_howto_table));
2263 ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
2264 }
2265 }
2266
2267 static reloc_howto_type *
2268 ppc64_elf_reloc_type_lookup (bfd *abfd,
2269 bfd_reloc_code_real_type code)
2270 {
2271 enum elf_ppc64_reloc_type r = R_PPC64_NONE;
2272
2273 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2274 /* Initialize howto table if needed. */
2275 ppc_howto_init ();
2276
2277 switch (code)
2278 {
2279 default:
2280 /* xgettext:c-format */
2281 _bfd_error_handler (_("%pB: unsupported relocation type %#x"), abfd, (int) code);
2282 bfd_set_error (bfd_error_bad_value);
2283 return NULL;
2284
2285 case BFD_RELOC_NONE: r = R_PPC64_NONE;
2286 break;
2287 case BFD_RELOC_32: r = R_PPC64_ADDR32;
2288 break;
2289 case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24;
2290 break;
2291 case BFD_RELOC_16: r = R_PPC64_ADDR16;
2292 break;
2293 case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO;
2294 break;
2295 case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI;
2296 break;
2297 case BFD_RELOC_PPC64_ADDR16_HIGH: r = R_PPC64_ADDR16_HIGH;
2298 break;
2299 case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA;
2300 break;
2301 case BFD_RELOC_PPC64_ADDR16_HIGHA: r = R_PPC64_ADDR16_HIGHA;
2302 break;
2303 case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14;
2304 break;
2305 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN;
2306 break;
2307 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN;
2308 break;
2309 case BFD_RELOC_PPC_B26: r = R_PPC64_REL24;
2310 break;
2311 case BFD_RELOC_PPC_B16: r = R_PPC64_REL14;
2312 break;
2313 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN;
2314 break;
2315 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN;
2316 break;
2317 case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16;
2318 break;
2319 case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO;
2320 break;
2321 case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI;
2322 break;
2323 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA;
2324 break;
2325 case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY;
2326 break;
2327 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT;
2328 break;
2329 case BFD_RELOC_32_PCREL: r = R_PPC64_REL32;
2330 break;
2331 case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32;
2332 break;
2333 case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32;
2334 break;
2335 case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO;
2336 break;
2337 case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI;
2338 break;
2339 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA;
2340 break;
2341 case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF;
2342 break;
2343 case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO;
2344 break;
2345 case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI;
2346 break;
2347 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA;
2348 break;
2349 case BFD_RELOC_CTOR: r = R_PPC64_ADDR64;
2350 break;
2351 case BFD_RELOC_64: r = R_PPC64_ADDR64;
2352 break;
2353 case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER;
2354 break;
2355 case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA;
2356 break;
2357 case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST;
2358 break;
2359 case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA;
2360 break;
2361 case BFD_RELOC_64_PCREL: r = R_PPC64_REL64;
2362 break;
2363 case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64;
2364 break;
2365 case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64;
2366 break;
2367 case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16;
2368 break;
2369 case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO;
2370 break;
2371 case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI;
2372 break;
2373 case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA;
2374 break;
2375 case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC;
2376 break;
2377 case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16;
2378 break;
2379 case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO;
2380 break;
2381 case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI;
2382 break;
2383 case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA;
2384 break;
2385 case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS;
2386 break;
2387 case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS;
2388 break;
2389 case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS;
2390 break;
2391 case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS;
2392 break;
2393 case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS;
2394 break;
2395 case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS;
2396 break;
2397 case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS;
2398 break;
2399 case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS;
2400 break;
2401 case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS;
2402 break;
2403 case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS;
2404 break;
2405 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS;
2406 break;
2407 case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS;
2408 break;
2409 case BFD_RELOC_PPC_TLSGD: r = R_PPC64_TLSGD;
2410 break;
2411 case BFD_RELOC_PPC_TLSLD: r = R_PPC64_TLSLD;
2412 break;
2413 case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64;
2414 break;
2415 case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16;
2416 break;
2417 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO;
2418 break;
2419 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI;
2420 break;
2421 case BFD_RELOC_PPC64_TPREL16_HIGH: r = R_PPC64_TPREL16_HIGH;
2422 break;
2423 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA;
2424 break;
2425 case BFD_RELOC_PPC64_TPREL16_HIGHA: r = R_PPC64_TPREL16_HIGHA;
2426 break;
2427 case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64;
2428 break;
2429 case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16;
2430 break;
2431 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO;
2432 break;
2433 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI;
2434 break;
2435 case BFD_RELOC_PPC64_DTPREL16_HIGH: r = R_PPC64_DTPREL16_HIGH;
2436 break;
2437 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA;
2438 break;
2439 case BFD_RELOC_PPC64_DTPREL16_HIGHA: r = R_PPC64_DTPREL16_HIGHA;
2440 break;
2441 case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64;
2442 break;
2443 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16;
2444 break;
2445 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO;
2446 break;
2447 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI;
2448 break;
2449 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA;
2450 break;
2451 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16;
2452 break;
2453 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO;
2454 break;
2455 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI;
2456 break;
2457 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA;
2458 break;
2459 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS;
2460 break;
2461 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS;
2462 break;
2463 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI;
2464 break;
2465 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA;
2466 break;
2467 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS;
2468 break;
2469 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS;
2470 break;
2471 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI;
2472 break;
2473 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA;
2474 break;
2475 case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS;
2476 break;
2477 case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS;
2478 break;
2479 case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER;
2480 break;
2481 case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA;
2482 break;
2483 case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST;
2484 break;
2485 case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA;
2486 break;
2487 case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS;
2488 break;
2489 case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS;
2490 break;
2491 case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER;
2492 break;
2493 case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA;
2494 break;
2495 case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST;
2496 break;
2497 case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA;
2498 break;
2499 case BFD_RELOC_16_PCREL: r = R_PPC64_REL16;
2500 break;
2501 case BFD_RELOC_LO16_PCREL: r = R_PPC64_REL16_LO;
2502 break;
2503 case BFD_RELOC_HI16_PCREL: r = R_PPC64_REL16_HI;
2504 break;
2505 case BFD_RELOC_HI16_S_PCREL: r = R_PPC64_REL16_HA;
2506 break;
2507 case BFD_RELOC_PPC_16DX_HA: r = R_PPC64_16DX_HA;
2508 break;
2509 case BFD_RELOC_PPC_REL16DX_HA: r = R_PPC64_REL16DX_HA;
2510 break;
2511 case BFD_RELOC_PPC64_ENTRY: r = R_PPC64_ENTRY;
2512 break;
2513 case BFD_RELOC_PPC64_ADDR64_LOCAL: r = R_PPC64_ADDR64_LOCAL;
2514 break;
2515 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT;
2516 break;
2517 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY;
2518 break;
2519 }
2520
2521 return ppc64_elf_howto_table[r];
2522 };
2523
2524 static reloc_howto_type *
2525 ppc64_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2526 const char *r_name)
2527 {
2528 unsigned int i;
2529
2530 for (i = 0; i < ARRAY_SIZE (ppc64_elf_howto_raw); i++)
2531 if (ppc64_elf_howto_raw[i].name != NULL
2532 && strcasecmp (ppc64_elf_howto_raw[i].name, r_name) == 0)
2533 return &ppc64_elf_howto_raw[i];
2534
2535
2536 return NULL;
2537 }
2538
2539 /* Set the howto pointer for a PowerPC ELF reloc. */
2540
2541 static bfd_boolean
2542 ppc64_elf_info_to_howto (bfd *abfd, arelent *cache_ptr,
2543 Elf_Internal_Rela *dst)
2544 {
2545 unsigned int type;
2546
2547 /* Initialize howto table if needed. */
2548 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2549 ppc_howto_init ();
2550
2551 type = ELF64_R_TYPE (dst->r_info);
2552 if (type >= ARRAY_SIZE (ppc64_elf_howto_table))
2553 {
2554 /* xgettext:c-format */
2555 _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
2556 abfd, type);
2557 bfd_set_error (bfd_error_bad_value);
2558 return FALSE;
2559 }
2560 cache_ptr->howto = ppc64_elf_howto_table[type];
2561 if (cache_ptr->howto == NULL || cache_ptr->howto->name == NULL)
2562 {
2563 /* xgettext:c-format */
2564 _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
2565 abfd, type);
2566 bfd_set_error (bfd_error_bad_value);
2567 return FALSE;
2568 }
2569
2570 return TRUE;
2571 }
2572
2573 /* Handle the R_PPC64_ADDR16_HA and similar relocs. */
2574
2575 static bfd_reloc_status_type
2576 ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2577 void *data, asection *input_section,
2578 bfd *output_bfd, char **error_message)
2579 {
2580 enum elf_ppc64_reloc_type r_type;
2581 long insn;
2582 bfd_size_type octets;
2583 bfd_vma value;
2584
2585 /* If this is a relocatable link (output_bfd test tells us), just
2586 call the generic function. Any adjustment will be done at final
2587 link time. */
2588 if (output_bfd != NULL)
2589 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2590 input_section, output_bfd, error_message);
2591
2592 /* Adjust the addend for sign extension of the low 16 bits.
2593 We won't actually be using the low 16 bits, so trashing them
2594 doesn't matter. */
2595 reloc_entry->addend += 0x8000;
2596 r_type = reloc_entry->howto->type;
2597 if (r_type != R_PPC64_REL16DX_HA)
2598 return bfd_reloc_continue;
2599
2600 value = 0;
2601 if (!bfd_is_com_section (symbol->section))
2602 value = symbol->value;
2603 value += (reloc_entry->addend
2604 + symbol->section->output_offset
2605 + symbol->section->output_section->vma);
2606 value -= (reloc_entry->address
2607 + input_section->output_offset
2608 + input_section->output_section->vma);
2609 value = (bfd_signed_vma) value >> 16;
2610
2611 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2612 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2613 insn &= ~0x1fffc1;
2614 insn |= (value & 0xffc1) | ((value & 0x3e) << 15);
2615 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2616 if (value + 0x8000 > 0xffff)
2617 return bfd_reloc_overflow;
2618 return bfd_reloc_ok;
2619 }
2620
2621 static bfd_reloc_status_type
2622 ppc64_elf_branch_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2623 void *data, asection *input_section,
2624 bfd *output_bfd, char **error_message)
2625 {
2626 if (output_bfd != NULL)
2627 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2628 input_section, output_bfd, error_message);
2629
2630 if (strcmp (symbol->section->name, ".opd") == 0
2631 && (symbol->section->owner->flags & DYNAMIC) == 0)
2632 {
2633 bfd_vma dest = opd_entry_value (symbol->section,
2634 symbol->value + reloc_entry->addend,
2635 NULL, NULL, FALSE);
2636 if (dest != (bfd_vma) -1)
2637 reloc_entry->addend = dest - (symbol->value
2638 + symbol->section->output_section->vma
2639 + symbol->section->output_offset);
2640 }
2641 else
2642 {
2643 elf_symbol_type *elfsym = (elf_symbol_type *) symbol;
2644
2645 if (symbol->section->owner != abfd
2646 && symbol->section->owner != NULL
2647 && abiversion (symbol->section->owner) >= 2)
2648 {
2649 unsigned int i;
2650
2651 for (i = 0; i < symbol->section->owner->symcount; ++i)
2652 {
2653 asymbol *symdef = symbol->section->owner->outsymbols[i];
2654
2655 if (strcmp (symdef->name, symbol->name) == 0)
2656 {
2657 elfsym = (elf_symbol_type *) symdef;
2658 break;
2659 }
2660 }
2661 }
2662 reloc_entry->addend
2663 += PPC64_LOCAL_ENTRY_OFFSET (elfsym->internal_elf_sym.st_other);
2664 }
2665 return bfd_reloc_continue;
2666 }
2667
2668 static bfd_reloc_status_type
2669 ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2670 void *data, asection *input_section,
2671 bfd *output_bfd, char **error_message)
2672 {
2673 long insn;
2674 enum elf_ppc64_reloc_type r_type;
2675 bfd_size_type octets;
2676 /* Assume 'at' branch hints. */
2677 bfd_boolean is_isa_v2 = TRUE;
2678
2679 /* If this is a relocatable link (output_bfd test tells us), just
2680 call the generic function. Any adjustment will be done at final
2681 link time. */
2682 if (output_bfd != NULL)
2683 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2684 input_section, output_bfd, error_message);
2685
2686 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2687 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2688 insn &= ~(0x01 << 21);
2689 r_type = reloc_entry->howto->type;
2690 if (r_type == R_PPC64_ADDR14_BRTAKEN
2691 || r_type == R_PPC64_REL14_BRTAKEN)
2692 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
2693
2694 if (is_isa_v2)
2695 {
2696 /* Set 'a' bit. This is 0b00010 in BO field for branch
2697 on CR(BI) insns (BO == 001at or 011at), and 0b01000
2698 for branch on CTR insns (BO == 1a00t or 1a01t). */
2699 if ((insn & (0x14 << 21)) == (0x04 << 21))
2700 insn |= 0x02 << 21;
2701 else if ((insn & (0x14 << 21)) == (0x10 << 21))
2702 insn |= 0x08 << 21;
2703 else
2704 goto out;
2705 }
2706 else
2707 {
2708 bfd_vma target = 0;
2709 bfd_vma from;
2710
2711 if (!bfd_is_com_section (symbol->section))
2712 target = symbol->value;
2713 target += symbol->section->output_section->vma;
2714 target += symbol->section->output_offset;
2715 target += reloc_entry->addend;
2716
2717 from = (reloc_entry->address
2718 + input_section->output_offset
2719 + input_section->output_section->vma);
2720
2721 /* Invert 'y' bit if not the default. */
2722 if ((bfd_signed_vma) (target - from) < 0)
2723 insn ^= 0x01 << 21;
2724 }
2725 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2726 out:
2727 return ppc64_elf_branch_reloc (abfd, reloc_entry, symbol, data,
2728 input_section, output_bfd, error_message);
2729 }
2730
2731 static bfd_reloc_status_type
2732 ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2733 void *data, asection *input_section,
2734 bfd *output_bfd, char **error_message)
2735 {
2736 /* If this is a relocatable link (output_bfd test tells us), just
2737 call the generic function. Any adjustment will be done at final
2738 link time. */
2739 if (output_bfd != NULL)
2740 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2741 input_section, output_bfd, error_message);
2742
2743 /* Subtract the symbol section base address. */
2744 reloc_entry->addend -= symbol->section->output_section->vma;
2745 return bfd_reloc_continue;
2746 }
2747
2748 static bfd_reloc_status_type
2749 ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2750 void *data, asection *input_section,
2751 bfd *output_bfd, char **error_message)
2752 {
2753 /* If this is a relocatable link (output_bfd test tells us), just
2754 call the generic function. Any adjustment will be done at final
2755 link time. */
2756 if (output_bfd != NULL)
2757 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2758 input_section, output_bfd, error_message);
2759
2760 /* Subtract the symbol section base address. */
2761 reloc_entry->addend -= symbol->section->output_section->vma;
2762
2763 /* Adjust the addend for sign extension of the low 16 bits. */
2764 reloc_entry->addend += 0x8000;
2765 return bfd_reloc_continue;
2766 }
2767
2768 static bfd_reloc_status_type
2769 ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2770 void *data, asection *input_section,
2771 bfd *output_bfd, char **error_message)
2772 {
2773 bfd_vma TOCstart;
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 /* Subtract the TOC base address. */
2787 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2788 return bfd_reloc_continue;
2789 }
2790
2791 static bfd_reloc_status_type
2792 ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2793 void *data, asection *input_section,
2794 bfd *output_bfd, char **error_message)
2795 {
2796 bfd_vma TOCstart;
2797
2798 /* If this is a relocatable link (output_bfd test tells us), just
2799 call the generic function. Any adjustment will be done at final
2800 link time. */
2801 if (output_bfd != NULL)
2802 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2803 input_section, output_bfd, error_message);
2804
2805 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2806 if (TOCstart == 0)
2807 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2808
2809 /* Subtract the TOC base address. */
2810 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2811
2812 /* Adjust the addend for sign extension of the low 16 bits. */
2813 reloc_entry->addend += 0x8000;
2814 return bfd_reloc_continue;
2815 }
2816
2817 static bfd_reloc_status_type
2818 ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2819 void *data, asection *input_section,
2820 bfd *output_bfd, char **error_message)
2821 {
2822 bfd_vma TOCstart;
2823 bfd_size_type octets;
2824
2825 /* If this is a relocatable link (output_bfd test tells us), just
2826 call the generic function. Any adjustment will be done at final
2827 link time. */
2828 if (output_bfd != NULL)
2829 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2830 input_section, output_bfd, error_message);
2831
2832 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2833 if (TOCstart == 0)
2834 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2835
2836 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2837 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
2838 return bfd_reloc_ok;
2839 }
2840
2841 static bfd_reloc_status_type
2842 ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2843 void *data, asection *input_section,
2844 bfd *output_bfd, char **error_message)
2845 {
2846 /* If this is a relocatable link (output_bfd test tells us), just
2847 call the generic function. Any adjustment will be done at final
2848 link time. */
2849 if (output_bfd != NULL)
2850 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2851 input_section, output_bfd, error_message);
2852
2853 if (error_message != NULL)
2854 {
2855 static char buf[60];
2856 sprintf (buf, "generic linker can't handle %s",
2857 reloc_entry->howto->name);
2858 *error_message = buf;
2859 }
2860 return bfd_reloc_dangerous;
2861 }
2862
2863 /* Track GOT entries needed for a given symbol. We might need more
2864 than one got entry per symbol. */
2865 struct got_entry
2866 {
2867 struct got_entry *next;
2868
2869 /* The symbol addend that we'll be placing in the GOT. */
2870 bfd_vma addend;
2871
2872 /* Unlike other ELF targets, we use separate GOT entries for the same
2873 symbol referenced from different input files. This is to support
2874 automatic multiple TOC/GOT sections, where the TOC base can vary
2875 from one input file to another. After partitioning into TOC groups
2876 we merge entries within the group.
2877
2878 Point to the BFD owning this GOT entry. */
2879 bfd *owner;
2880
2881 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
2882 TLS_TPREL or TLS_DTPREL for tls entries. */
2883 unsigned char tls_type;
2884
2885 /* Non-zero if got.ent points to real entry. */
2886 unsigned char is_indirect;
2887
2888 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
2889 union
2890 {
2891 bfd_signed_vma refcount;
2892 bfd_vma offset;
2893 struct got_entry *ent;
2894 } got;
2895 };
2896
2897 /* The same for PLT. */
2898 struct plt_entry
2899 {
2900 struct plt_entry *next;
2901
2902 bfd_vma addend;
2903
2904 union
2905 {
2906 bfd_signed_vma refcount;
2907 bfd_vma offset;
2908 } plt;
2909 };
2910
2911 struct ppc64_elf_obj_tdata
2912 {
2913 struct elf_obj_tdata elf;
2914
2915 /* Shortcuts to dynamic linker sections. */
2916 asection *got;
2917 asection *relgot;
2918
2919 /* Used during garbage collection. We attach global symbols defined
2920 on removed .opd entries to this section so that the sym is removed. */
2921 asection *deleted_section;
2922
2923 /* TLS local dynamic got entry handling. Support for multiple GOT
2924 sections means we potentially need one of these for each input bfd. */
2925 struct got_entry tlsld_got;
2926
2927 union {
2928 /* A copy of relocs before they are modified for --emit-relocs. */
2929 Elf_Internal_Rela *relocs;
2930
2931 /* Section contents. */
2932 bfd_byte *contents;
2933 } opd;
2934
2935 /* Nonzero if this bfd has small toc/got relocs, ie. that expect
2936 the reloc to be in the range -32768 to 32767. */
2937 unsigned int has_small_toc_reloc : 1;
2938
2939 /* Set if toc/got ha relocs detected not using r2, or lo reloc
2940 instruction not one we handle. */
2941 unsigned int unexpected_toc_insn : 1;
2942 };
2943
2944 #define ppc64_elf_tdata(bfd) \
2945 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
2946
2947 #define ppc64_tlsld_got(bfd) \
2948 (&ppc64_elf_tdata (bfd)->tlsld_got)
2949
2950 #define is_ppc64_elf(bfd) \
2951 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2952 && elf_object_id (bfd) == PPC64_ELF_DATA)
2953
2954 /* Override the generic function because we store some extras. */
2955
2956 static bfd_boolean
2957 ppc64_elf_mkobject (bfd *abfd)
2958 {
2959 return bfd_elf_allocate_object (abfd, sizeof (struct ppc64_elf_obj_tdata),
2960 PPC64_ELF_DATA);
2961 }
2962
2963 /* Fix bad default arch selected for a 64 bit input bfd when the
2964 default is 32 bit. Also select arch based on apuinfo. */
2965
2966 static bfd_boolean
2967 ppc64_elf_object_p (bfd *abfd)
2968 {
2969 if (!abfd->arch_info->the_default)
2970 return TRUE;
2971
2972 if (abfd->arch_info->bits_per_word == 32)
2973 {
2974 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2975
2976 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2977 {
2978 /* Relies on arch after 32 bit default being 64 bit default. */
2979 abfd->arch_info = abfd->arch_info->next;
2980 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2981 }
2982 }
2983 return _bfd_elf_ppc_set_arch (abfd);
2984 }
2985
2986 /* Support for core dump NOTE sections. */
2987
2988 static bfd_boolean
2989 ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2990 {
2991 size_t offset, size;
2992
2993 if (note->descsz != 504)
2994 return FALSE;
2995
2996 /* pr_cursig */
2997 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
2998
2999 /* pr_pid */
3000 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 32);
3001
3002 /* pr_reg */
3003 offset = 112;
3004 size = 384;
3005
3006 /* Make a ".reg/999" section. */
3007 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
3008 size, note->descpos + offset);
3009 }
3010
3011 static bfd_boolean
3012 ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
3013 {
3014 if (note->descsz != 136)
3015 return FALSE;
3016
3017 elf_tdata (abfd)->core->pid
3018 = bfd_get_32 (abfd, note->descdata + 24);
3019 elf_tdata (abfd)->core->program
3020 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
3021 elf_tdata (abfd)->core->command
3022 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
3023
3024 return TRUE;
3025 }
3026
3027 static char *
3028 ppc64_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type,
3029 ...)
3030 {
3031 switch (note_type)
3032 {
3033 default:
3034 return NULL;
3035
3036 case NT_PRPSINFO:
3037 {
3038 char data[136] ATTRIBUTE_NONSTRING;
3039 va_list ap;
3040
3041 va_start (ap, note_type);
3042 memset (data, 0, sizeof (data));
3043 strncpy (data + 40, va_arg (ap, const char *), 16);
3044 #if GCC_VERSION == 8001
3045 DIAGNOSTIC_PUSH;
3046 /* GCC 8.1 warns about 80 equals destination size with
3047 -Wstringop-truncation:
3048 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85643
3049 */
3050 DIAGNOSTIC_IGNORE_STRINGOP_TRUNCATION;
3051 #endif
3052 strncpy (data + 56, va_arg (ap, const char *), 80);
3053 #if GCC_VERSION == 8001
3054 DIAGNOSTIC_POP;
3055 #endif
3056 va_end (ap);
3057 return elfcore_write_note (abfd, buf, bufsiz,
3058 "CORE", note_type, data, sizeof (data));
3059 }
3060
3061 case NT_PRSTATUS:
3062 {
3063 char data[504];
3064 va_list ap;
3065 long pid;
3066 int cursig;
3067 const void *greg;
3068
3069 va_start (ap, note_type);
3070 memset (data, 0, 112);
3071 pid = va_arg (ap, long);
3072 bfd_put_32 (abfd, pid, data + 32);
3073 cursig = va_arg (ap, int);
3074 bfd_put_16 (abfd, cursig, data + 12);
3075 greg = va_arg (ap, const void *);
3076 memcpy (data + 112, greg, 384);
3077 memset (data + 496, 0, 8);
3078 va_end (ap);
3079 return elfcore_write_note (abfd, buf, bufsiz,
3080 "CORE", note_type, data, sizeof (data));
3081 }
3082 }
3083 }
3084
3085 /* Add extra PPC sections. */
3086
3087 static const struct bfd_elf_special_section ppc64_elf_special_sections[]=
3088 {
3089 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, 0 },
3090 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
3091 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
3092 { STRING_COMMA_LEN (".toc"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
3093 { STRING_COMMA_LEN (".toc1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
3094 { STRING_COMMA_LEN (".tocbss"), 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
3095 { NULL, 0, 0, 0, 0 }
3096 };
3097
3098 enum _ppc64_sec_type {
3099 sec_normal = 0,
3100 sec_opd = 1,
3101 sec_toc = 2
3102 };
3103
3104 struct _ppc64_elf_section_data
3105 {
3106 struct bfd_elf_section_data elf;
3107
3108 union
3109 {
3110 /* An array with one entry for each opd function descriptor,
3111 and some spares since opd entries may be either 16 or 24 bytes. */
3112 #define OPD_NDX(OFF) ((OFF) >> 4)
3113 struct _opd_sec_data
3114 {
3115 /* Points to the function code section for local opd entries. */
3116 asection **func_sec;
3117
3118 /* After editing .opd, adjust references to opd local syms. */
3119 long *adjust;
3120 } opd;
3121
3122 /* An array for toc sections, indexed by offset/8. */
3123 struct _toc_sec_data
3124 {
3125 /* Specifies the relocation symbol index used at a given toc offset. */
3126 unsigned *symndx;
3127
3128 /* And the relocation addend. */
3129 bfd_vma *add;
3130 } toc;
3131 } u;
3132
3133 enum _ppc64_sec_type sec_type:2;
3134
3135 /* Flag set when small branches are detected. Used to
3136 select suitable defaults for the stub group size. */
3137 unsigned int has_14bit_branch:1;
3138
3139 /* Flag set when PLTCALL relocs are detected. */
3140 unsigned int has_pltcall:1;
3141 };
3142
3143 #define ppc64_elf_section_data(sec) \
3144 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
3145
3146 static bfd_boolean
3147 ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
3148 {
3149 if (!sec->used_by_bfd)
3150 {
3151 struct _ppc64_elf_section_data *sdata;
3152 bfd_size_type amt = sizeof (*sdata);
3153
3154 sdata = bfd_zalloc (abfd, amt);
3155 if (sdata == NULL)
3156 return FALSE;
3157 sec->used_by_bfd = sdata;
3158 }
3159
3160 return _bfd_elf_new_section_hook (abfd, sec);
3161 }
3162
3163 static struct _opd_sec_data *
3164 get_opd_info (asection * sec)
3165 {
3166 if (sec != NULL
3167 && ppc64_elf_section_data (sec) != NULL
3168 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
3169 return &ppc64_elf_section_data (sec)->u.opd;
3170 return NULL;
3171 }
3172 \f
3173 /* Parameters for the qsort hook. */
3174 static bfd_boolean synthetic_relocatable;
3175 static asection *synthetic_opd;
3176
3177 /* qsort comparison function for ppc64_elf_get_synthetic_symtab. */
3178
3179 static int
3180 compare_symbols (const void *ap, const void *bp)
3181 {
3182 const asymbol *a = * (const asymbol **) ap;
3183 const asymbol *b = * (const asymbol **) bp;
3184
3185 /* Section symbols first. */
3186 if ((a->flags & BSF_SECTION_SYM) && !(b->flags & BSF_SECTION_SYM))
3187 return -1;
3188 if (!(a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM))
3189 return 1;
3190
3191 /* then .opd symbols. */
3192 if (synthetic_opd != NULL)
3193 {
3194 if (strcmp (a->section->name, ".opd") == 0
3195 && strcmp (b->section->name, ".opd") != 0)
3196 return -1;
3197 if (strcmp (a->section->name, ".opd") != 0
3198 && strcmp (b->section->name, ".opd") == 0)
3199 return 1;
3200 }
3201
3202 /* then other code symbols. */
3203 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3204 == (SEC_CODE | SEC_ALLOC)
3205 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3206 != (SEC_CODE | SEC_ALLOC))
3207 return -1;
3208
3209 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3210 != (SEC_CODE | SEC_ALLOC)
3211 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3212 == (SEC_CODE | SEC_ALLOC))
3213 return 1;
3214
3215 if (synthetic_relocatable)
3216 {
3217 if (a->section->id < b->section->id)
3218 return -1;
3219
3220 if (a->section->id > b->section->id)
3221 return 1;
3222 }
3223
3224 if (a->value + a->section->vma < b->value + b->section->vma)
3225 return -1;
3226
3227 if (a->value + a->section->vma > b->value + b->section->vma)
3228 return 1;
3229
3230 /* For syms with the same value, prefer strong dynamic global function
3231 syms over other syms. */
3232 if ((a->flags & BSF_GLOBAL) != 0 && (b->flags & BSF_GLOBAL) == 0)
3233 return -1;
3234
3235 if ((a->flags & BSF_GLOBAL) == 0 && (b->flags & BSF_GLOBAL) != 0)
3236 return 1;
3237
3238 if ((a->flags & BSF_FUNCTION) != 0 && (b->flags & BSF_FUNCTION) == 0)
3239 return -1;
3240
3241 if ((a->flags & BSF_FUNCTION) == 0 && (b->flags & BSF_FUNCTION) != 0)
3242 return 1;
3243
3244 if ((a->flags & BSF_WEAK) == 0 && (b->flags & BSF_WEAK) != 0)
3245 return -1;
3246
3247 if ((a->flags & BSF_WEAK) != 0 && (b->flags & BSF_WEAK) == 0)
3248 return 1;
3249
3250 if ((a->flags & BSF_DYNAMIC) != 0 && (b->flags & BSF_DYNAMIC) == 0)
3251 return -1;
3252
3253 if ((a->flags & BSF_DYNAMIC) == 0 && (b->flags & BSF_DYNAMIC) != 0)
3254 return 1;
3255
3256 return a > b;
3257 }
3258
3259 /* Search SYMS for a symbol of the given VALUE. */
3260
3261 static asymbol *
3262 sym_exists_at (asymbol **syms, long lo, long hi, unsigned int id, bfd_vma value)
3263 {
3264 long mid;
3265
3266 if (id == (unsigned) -1)
3267 {
3268 while (lo < hi)
3269 {
3270 mid = (lo + hi) >> 1;
3271 if (syms[mid]->value + syms[mid]->section->vma < value)
3272 lo = mid + 1;
3273 else if (syms[mid]->value + syms[mid]->section->vma > value)
3274 hi = mid;
3275 else
3276 return syms[mid];
3277 }
3278 }
3279 else
3280 {
3281 while (lo < hi)
3282 {
3283 mid = (lo + hi) >> 1;
3284 if (syms[mid]->section->id < id)
3285 lo = mid + 1;
3286 else if (syms[mid]->section->id > id)
3287 hi = mid;
3288 else if (syms[mid]->value < value)
3289 lo = mid + 1;
3290 else if (syms[mid]->value > value)
3291 hi = mid;
3292 else
3293 return syms[mid];
3294 }
3295 }
3296 return NULL;
3297 }
3298
3299 static bfd_boolean
3300 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
3301 {
3302 bfd_vma vma = *(bfd_vma *) ptr;
3303 return ((section->flags & SEC_ALLOC) != 0
3304 && section->vma <= vma
3305 && vma < section->vma + section->size);
3306 }
3307
3308 /* Create synthetic symbols, effectively restoring "dot-symbol" function
3309 entry syms. Also generate @plt symbols for the glink branch table.
3310 Returns count of synthetic symbols in RET or -1 on error. */
3311
3312 static long
3313 ppc64_elf_get_synthetic_symtab (bfd *abfd,
3314 long static_count, asymbol **static_syms,
3315 long dyn_count, asymbol **dyn_syms,
3316 asymbol **ret)
3317 {
3318 asymbol *s;
3319 size_t i, j, count;
3320 char *names;
3321 size_t symcount, codesecsym, codesecsymend, secsymend, opdsymend;
3322 asection *opd = NULL;
3323 bfd_boolean relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0;
3324 asymbol **syms;
3325 int abi = abiversion (abfd);
3326
3327 *ret = NULL;
3328
3329 if (abi < 2)
3330 {
3331 opd = bfd_get_section_by_name (abfd, ".opd");
3332 if (opd == NULL && abi == 1)
3333 return 0;
3334 }
3335
3336 syms = NULL;
3337 codesecsym = 0;
3338 codesecsymend = 0;
3339 secsymend = 0;
3340 opdsymend = 0;
3341 symcount = 0;
3342 if (opd != NULL)
3343 {
3344 symcount = static_count;
3345 if (!relocatable)
3346 symcount += dyn_count;
3347 if (symcount == 0)
3348 return 0;
3349
3350 syms = bfd_malloc ((symcount + 1) * sizeof (*syms));
3351 if (syms == NULL)
3352 return -1;
3353
3354 if (!relocatable && static_count != 0 && dyn_count != 0)
3355 {
3356 /* Use both symbol tables. */
3357 memcpy (syms, static_syms, static_count * sizeof (*syms));
3358 memcpy (syms + static_count, dyn_syms,
3359 (dyn_count + 1) * sizeof (*syms));
3360 }
3361 else if (!relocatable && static_count == 0)
3362 memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms));
3363 else
3364 memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms));
3365
3366 /* Trim uninteresting symbols. Interesting symbols are section,
3367 function, and notype symbols. */
3368 for (i = 0, j = 0; i < symcount; ++i)
3369 if ((syms[i]->flags & (BSF_FILE | BSF_OBJECT | BSF_THREAD_LOCAL
3370 | BSF_RELC | BSF_SRELC)) == 0)
3371 syms[j++] = syms[i];
3372 symcount = j;
3373
3374 synthetic_relocatable = relocatable;
3375 synthetic_opd = opd;
3376 qsort (syms, symcount, sizeof (*syms), compare_symbols);
3377
3378 if (!relocatable && symcount > 1)
3379 {
3380 /* Trim duplicate syms, since we may have merged the normal
3381 and dynamic symbols. Actually, we only care about syms
3382 that have different values, so trim any with the same
3383 value. Don't consider ifunc and ifunc resolver symbols
3384 duplicates however, because GDB wants to know whether a
3385 text symbol is an ifunc resolver. */
3386 for (i = 1, j = 1; i < symcount; ++i)
3387 {
3388 const asymbol *s0 = syms[i - 1];
3389 const asymbol *s1 = syms[i];
3390
3391 if ((s0->value + s0->section->vma
3392 != s1->value + s1->section->vma)
3393 || ((s0->flags & BSF_GNU_INDIRECT_FUNCTION)
3394 != (s1->flags & BSF_GNU_INDIRECT_FUNCTION)))
3395 syms[j++] = syms[i];
3396 }
3397 symcount = j;
3398 }
3399
3400 i = 0;
3401 /* Note that here and in compare_symbols we can't compare opd and
3402 sym->section directly. With separate debug info files, the
3403 symbols will be extracted from the debug file while abfd passed
3404 to this function is the real binary. */
3405 if (strcmp (syms[i]->section->name, ".opd") == 0)
3406 ++i;
3407 codesecsym = i;
3408
3409 for (; i < symcount; ++i)
3410 if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC
3411 | SEC_THREAD_LOCAL))
3412 != (SEC_CODE | SEC_ALLOC))
3413 || (syms[i]->flags & BSF_SECTION_SYM) == 0)
3414 break;
3415 codesecsymend = i;
3416
3417 for (; i < symcount; ++i)
3418 if ((syms[i]->flags & BSF_SECTION_SYM) == 0)
3419 break;
3420 secsymend = i;
3421
3422 for (; i < symcount; ++i)
3423 if (strcmp (syms[i]->section->name, ".opd") != 0)
3424 break;
3425 opdsymend = i;
3426
3427 for (; i < symcount; ++i)
3428 if ((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3429 != (SEC_CODE | SEC_ALLOC))
3430 break;
3431 symcount = i;
3432 }
3433 count = 0;
3434
3435 if (relocatable)
3436 {
3437 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3438 arelent *r;
3439 size_t size;
3440 size_t relcount;
3441
3442 if (opdsymend == secsymend)
3443 goto done;
3444
3445 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3446 relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0;
3447 if (relcount == 0)
3448 goto done;
3449
3450 if (!(*slurp_relocs) (abfd, opd, static_syms, FALSE))
3451 {
3452 count = -1;
3453 goto done;
3454 }
3455
3456 size = 0;
3457 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3458 {
3459 asymbol *sym;
3460
3461 while (r < opd->relocation + relcount
3462 && r->address < syms[i]->value + opd->vma)
3463 ++r;
3464
3465 if (r == opd->relocation + relcount)
3466 break;
3467
3468 if (r->address != syms[i]->value + opd->vma)
3469 continue;
3470
3471 if (r->howto->type != R_PPC64_ADDR64)
3472 continue;
3473
3474 sym = *r->sym_ptr_ptr;
3475 if (!sym_exists_at (syms, opdsymend, symcount,
3476 sym->section->id, sym->value + r->addend))
3477 {
3478 ++count;
3479 size += sizeof (asymbol);
3480 size += strlen (syms[i]->name) + 2;
3481 }
3482 }
3483
3484 if (size == 0)
3485 goto done;
3486 s = *ret = bfd_malloc (size);
3487 if (s == NULL)
3488 {
3489 count = -1;
3490 goto done;
3491 }
3492
3493 names = (char *) (s + count);
3494
3495 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3496 {
3497 asymbol *sym;
3498
3499 while (r < opd->relocation + relcount
3500 && r->address < syms[i]->value + opd->vma)
3501 ++r;
3502
3503 if (r == opd->relocation + relcount)
3504 break;
3505
3506 if (r->address != syms[i]->value + opd->vma)
3507 continue;
3508
3509 if (r->howto->type != R_PPC64_ADDR64)
3510 continue;
3511
3512 sym = *r->sym_ptr_ptr;
3513 if (!sym_exists_at (syms, opdsymend, symcount,
3514 sym->section->id, sym->value + r->addend))
3515 {
3516 size_t len;
3517
3518 *s = *syms[i];
3519 s->flags |= BSF_SYNTHETIC;
3520 s->section = sym->section;
3521 s->value = sym->value + r->addend;
3522 s->name = names;
3523 *names++ = '.';
3524 len = strlen (syms[i]->name);
3525 memcpy (names, syms[i]->name, len + 1);
3526 names += len + 1;
3527 /* Have udata.p point back to the original symbol this
3528 synthetic symbol was derived from. */
3529 s->udata.p = syms[i];
3530 s++;
3531 }
3532 }
3533 }
3534 else
3535 {
3536 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3537 bfd_byte *contents = NULL;
3538 size_t size;
3539 size_t plt_count = 0;
3540 bfd_vma glink_vma = 0, resolv_vma = 0;
3541 asection *dynamic, *glink = NULL, *relplt = NULL;
3542 arelent *p;
3543
3544 if (opd != NULL && !bfd_malloc_and_get_section (abfd, opd, &contents))
3545 {
3546 free_contents_and_exit_err:
3547 count = -1;
3548 free_contents_and_exit:
3549 if (contents)
3550 free (contents);
3551 goto done;
3552 }
3553
3554 size = 0;
3555 for (i = secsymend; i < opdsymend; ++i)
3556 {
3557 bfd_vma ent;
3558
3559 /* Ignore bogus symbols. */
3560 if (syms[i]->value > opd->size - 8)
3561 continue;
3562
3563 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3564 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3565 {
3566 ++count;
3567 size += sizeof (asymbol);
3568 size += strlen (syms[i]->name) + 2;
3569 }
3570 }
3571
3572 /* Get start of .glink stubs from DT_PPC64_GLINK. */
3573 if (dyn_count != 0
3574 && (dynamic = bfd_get_section_by_name (abfd, ".dynamic")) != NULL)
3575 {
3576 bfd_byte *dynbuf, *extdyn, *extdynend;
3577 size_t extdynsize;
3578 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
3579
3580 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
3581 goto free_contents_and_exit_err;
3582
3583 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
3584 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
3585
3586 extdyn = dynbuf;
3587 extdynend = extdyn + dynamic->size;
3588 for (; extdyn < extdynend; extdyn += extdynsize)
3589 {
3590 Elf_Internal_Dyn dyn;
3591 (*swap_dyn_in) (abfd, extdyn, &dyn);
3592
3593 if (dyn.d_tag == DT_NULL)
3594 break;
3595
3596 if (dyn.d_tag == DT_PPC64_GLINK)
3597 {
3598 /* The first glink stub starts at DT_PPC64_GLINK plus 32.
3599 See comment in ppc64_elf_finish_dynamic_sections. */
3600 glink_vma = dyn.d_un.d_val + 8 * 4;
3601 /* The .glink section usually does not survive the final
3602 link; search for the section (usually .text) where the
3603 glink stubs now reside. */
3604 glink = bfd_sections_find_if (abfd, section_covers_vma,
3605 &glink_vma);
3606 break;
3607 }
3608 }
3609
3610 free (dynbuf);
3611 }
3612
3613 if (glink != NULL)
3614 {
3615 /* Determine __glink trampoline by reading the relative branch
3616 from the first glink stub. */
3617 bfd_byte buf[4];
3618 unsigned int off = 0;
3619
3620 while (bfd_get_section_contents (abfd, glink, buf,
3621 glink_vma + off - glink->vma, 4))
3622 {
3623 unsigned int insn = bfd_get_32 (abfd, buf);
3624 insn ^= B_DOT;
3625 if ((insn & ~0x3fffffc) == 0)
3626 {
3627 resolv_vma = glink_vma + off + (insn ^ 0x2000000) - 0x2000000;
3628 break;
3629 }
3630 off += 4;
3631 if (off > 4)
3632 break;
3633 }
3634
3635 if (resolv_vma)
3636 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
3637
3638 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
3639 if (relplt != NULL)
3640 {
3641 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3642 if (! (*slurp_relocs) (abfd, relplt, dyn_syms, TRUE))
3643 goto free_contents_and_exit_err;
3644
3645 plt_count = relplt->size / sizeof (Elf64_External_Rela);
3646 size += plt_count * sizeof (asymbol);
3647
3648 p = relplt->relocation;
3649 for (i = 0; i < plt_count; i++, p++)
3650 {
3651 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
3652 if (p->addend != 0)
3653 size += sizeof ("+0x") - 1 + 16;
3654 }
3655 }
3656 }
3657
3658 if (size == 0)
3659 goto free_contents_and_exit;
3660 s = *ret = bfd_malloc (size);
3661 if (s == NULL)
3662 goto free_contents_and_exit_err;
3663
3664 names = (char *) (s + count + plt_count + (resolv_vma != 0));
3665
3666 for (i = secsymend; i < opdsymend; ++i)
3667 {
3668 bfd_vma ent;
3669
3670 if (syms[i]->value > opd->size - 8)
3671 continue;
3672
3673 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3674 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3675 {
3676 size_t lo, hi;
3677 size_t len;
3678 asection *sec = abfd->sections;
3679
3680 *s = *syms[i];
3681 lo = codesecsym;
3682 hi = codesecsymend;
3683 while (lo < hi)
3684 {
3685 size_t mid = (lo + hi) >> 1;
3686 if (syms[mid]->section->vma < ent)
3687 lo = mid + 1;
3688 else if (syms[mid]->section->vma > ent)
3689 hi = mid;
3690 else
3691 {
3692 sec = syms[mid]->section;
3693 break;
3694 }
3695 }
3696
3697 if (lo >= hi && lo > codesecsym)
3698 sec = syms[lo - 1]->section;
3699
3700 for (; sec != NULL; sec = sec->next)
3701 {
3702 if (sec->vma > ent)
3703 break;
3704 /* SEC_LOAD may not be set if SEC is from a separate debug
3705 info file. */
3706 if ((sec->flags & SEC_ALLOC) == 0)
3707 break;
3708 if ((sec->flags & SEC_CODE) != 0)
3709 s->section = sec;
3710 }
3711 s->flags |= BSF_SYNTHETIC;
3712 s->value = ent - s->section->vma;
3713 s->name = names;
3714 *names++ = '.';
3715 len = strlen (syms[i]->name);
3716 memcpy (names, syms[i]->name, len + 1);
3717 names += len + 1;
3718 /* Have udata.p point back to the original symbol this
3719 synthetic symbol was derived from. */
3720 s->udata.p = syms[i];
3721 s++;
3722 }
3723 }
3724 free (contents);
3725
3726 if (glink != NULL && relplt != NULL)
3727 {
3728 if (resolv_vma)
3729 {
3730 /* Add a symbol for the main glink trampoline. */
3731 memset (s, 0, sizeof *s);
3732 s->the_bfd = abfd;
3733 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3734 s->section = glink;
3735 s->value = resolv_vma - glink->vma;
3736 s->name = names;
3737 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3738 names += sizeof ("__glink_PLTresolve");
3739 s++;
3740 count++;
3741 }
3742
3743 /* FIXME: It would be very much nicer to put sym@plt on the
3744 stub rather than on the glink branch table entry. The
3745 objdump disassembler would then use a sensible symbol
3746 name on plt calls. The difficulty in doing so is
3747 a) finding the stubs, and,
3748 b) matching stubs against plt entries, and,
3749 c) there can be multiple stubs for a given plt entry.
3750
3751 Solving (a) could be done by code scanning, but older
3752 ppc64 binaries used different stubs to current code.
3753 (b) is the tricky one since you need to known the toc
3754 pointer for at least one function that uses a pic stub to
3755 be able to calculate the plt address referenced.
3756 (c) means gdb would need to set multiple breakpoints (or
3757 find the glink branch itself) when setting breakpoints
3758 for pending shared library loads. */
3759 p = relplt->relocation;
3760 for (i = 0; i < plt_count; i++, p++)
3761 {
3762 size_t len;
3763
3764 *s = **p->sym_ptr_ptr;
3765 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
3766 we are defining a symbol, ensure one of them is set. */
3767 if ((s->flags & BSF_LOCAL) == 0)
3768 s->flags |= BSF_GLOBAL;
3769 s->flags |= BSF_SYNTHETIC;
3770 s->section = glink;
3771 s->value = glink_vma - glink->vma;
3772 s->name = names;
3773 s->udata.p = NULL;
3774 len = strlen ((*p->sym_ptr_ptr)->name);
3775 memcpy (names, (*p->sym_ptr_ptr)->name, len);
3776 names += len;
3777 if (p->addend != 0)
3778 {
3779 memcpy (names, "+0x", sizeof ("+0x") - 1);
3780 names += sizeof ("+0x") - 1;
3781 bfd_sprintf_vma (abfd, names, p->addend);
3782 names += strlen (names);
3783 }
3784 memcpy (names, "@plt", sizeof ("@plt"));
3785 names += sizeof ("@plt");
3786 s++;
3787 if (abi < 2)
3788 {
3789 glink_vma += 8;
3790 if (i >= 0x8000)
3791 glink_vma += 4;
3792 }
3793 else
3794 glink_vma += 4;
3795 }
3796 count += plt_count;
3797 }
3798 }
3799
3800 done:
3801 free (syms);
3802 return count;
3803 }
3804 \f
3805 /* The following functions are specific to the ELF linker, while
3806 functions above are used generally. Those named ppc64_elf_* are
3807 called by the main ELF linker code. They appear in this file more
3808 or less in the order in which they are called. eg.
3809 ppc64_elf_check_relocs is called early in the link process,
3810 ppc64_elf_finish_dynamic_sections is one of the last functions
3811 called.
3812
3813 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
3814 functions have both a function code symbol and a function descriptor
3815 symbol. A call to foo in a relocatable object file looks like:
3816
3817 . .text
3818 . x:
3819 . bl .foo
3820 . nop
3821
3822 The function definition in another object file might be:
3823
3824 . .section .opd
3825 . foo: .quad .foo
3826 . .quad .TOC.@tocbase
3827 . .quad 0
3828 .
3829 . .text
3830 . .foo: blr
3831
3832 When the linker resolves the call during a static link, the branch
3833 unsurprisingly just goes to .foo and the .opd information is unused.
3834 If the function definition is in a shared library, things are a little
3835 different: The call goes via a plt call stub, the opd information gets
3836 copied to the plt, and the linker patches the nop.
3837
3838 . x:
3839 . bl .foo_stub
3840 . ld 2,40(1)
3841 .
3842 .
3843 . .foo_stub:
3844 . std 2,40(1) # in practice, the call stub
3845 . addis 11,2,Lfoo@toc@ha # is slightly optimized, but
3846 . addi 11,11,Lfoo@toc@l # this is the general idea
3847 . ld 12,0(11)
3848 . ld 2,8(11)
3849 . mtctr 12
3850 . ld 11,16(11)
3851 . bctr
3852 .
3853 . .section .plt
3854 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
3855
3856 The "reloc ()" notation is supposed to indicate that the linker emits
3857 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
3858 copying.
3859
3860 What are the difficulties here? Well, firstly, the relocations
3861 examined by the linker in check_relocs are against the function code
3862 sym .foo, while the dynamic relocation in the plt is emitted against
3863 the function descriptor symbol, foo. Somewhere along the line, we need
3864 to carefully copy dynamic link information from one symbol to the other.
3865 Secondly, the generic part of the elf linker will make .foo a dynamic
3866 symbol as is normal for most other backends. We need foo dynamic
3867 instead, at least for an application final link. However, when
3868 creating a shared library containing foo, we need to have both symbols
3869 dynamic so that references to .foo are satisfied during the early
3870 stages of linking. Otherwise the linker might decide to pull in a
3871 definition from some other object, eg. a static library.
3872
3873 Update: As of August 2004, we support a new convention. Function
3874 calls may use the function descriptor symbol, ie. "bl foo". This
3875 behaves exactly as "bl .foo". */
3876
3877 /* Of those relocs that might be copied as dynamic relocs, this
3878 function selects those that must be copied when linking a shared
3879 library or PIE, even when the symbol is local. */
3880
3881 static int
3882 must_be_dyn_reloc (struct bfd_link_info *info,
3883 enum elf_ppc64_reloc_type r_type)
3884 {
3885 switch (r_type)
3886 {
3887 default:
3888 /* Only relative relocs can be resolved when the object load
3889 address isn't fixed. DTPREL64 is excluded because the
3890 dynamic linker needs to differentiate global dynamic from
3891 local dynamic __tls_index pairs when PPC64_OPT_TLS is set. */
3892 return 1;
3893
3894 case R_PPC64_REL32:
3895 case R_PPC64_REL64:
3896 case R_PPC64_REL30:
3897 return 0;
3898
3899 case R_PPC64_TPREL16:
3900 case R_PPC64_TPREL16_LO:
3901 case R_PPC64_TPREL16_HI:
3902 case R_PPC64_TPREL16_HA:
3903 case R_PPC64_TPREL16_DS:
3904 case R_PPC64_TPREL16_LO_DS:
3905 case R_PPC64_TPREL16_HIGH:
3906 case R_PPC64_TPREL16_HIGHA:
3907 case R_PPC64_TPREL16_HIGHER:
3908 case R_PPC64_TPREL16_HIGHERA:
3909 case R_PPC64_TPREL16_HIGHEST:
3910 case R_PPC64_TPREL16_HIGHESTA:
3911 case R_PPC64_TPREL64:
3912 /* These relocations are relative but in a shared library the
3913 linker doesn't know the thread pointer base. */
3914 return bfd_link_dll (info);
3915 }
3916 }
3917
3918 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3919 copying dynamic variables from a shared lib into an app's dynbss
3920 section, and instead use a dynamic relocation to point into the
3921 shared lib. With code that gcc generates, it's vital that this be
3922 enabled; In the PowerPC64 ABI, the address of a function is actually
3923 the address of a function descriptor, which resides in the .opd
3924 section. gcc uses the descriptor directly rather than going via the
3925 GOT as some other ABI's do, which means that initialized function
3926 pointers must reference the descriptor. Thus, a function pointer
3927 initialized to the address of a function in a shared library will
3928 either require a copy reloc, or a dynamic reloc. Using a copy reloc
3929 redefines the function descriptor symbol to point to the copy. This
3930 presents a problem as a plt entry for that function is also
3931 initialized from the function descriptor symbol and the copy reloc
3932 may not be initialized first. */
3933 #define ELIMINATE_COPY_RELOCS 1
3934
3935 /* Section name for stubs is the associated section name plus this
3936 string. */
3937 #define STUB_SUFFIX ".stub"
3938
3939 /* Linker stubs.
3940 ppc_stub_long_branch:
3941 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
3942 destination, but a 24 bit branch in a stub section will reach.
3943 . b dest
3944
3945 ppc_stub_plt_branch:
3946 Similar to the above, but a 24 bit branch in the stub section won't
3947 reach its destination.
3948 . addis %r11,%r2,xxx@toc@ha
3949 . ld %r12,xxx@toc@l(%r11)
3950 . mtctr %r12
3951 . bctr
3952
3953 ppc_stub_plt_call:
3954 Used to call a function in a shared library. If it so happens that
3955 the plt entry referenced crosses a 64k boundary, then an extra
3956 "addi %r11,%r11,xxx@toc@l" will be inserted before the "mtctr".
3957 . std %r2,40(%r1)
3958 . addis %r11,%r2,xxx@toc@ha
3959 . ld %r12,xxx+0@toc@l(%r11)
3960 . mtctr %r12
3961 . ld %r2,xxx+8@toc@l(%r11)
3962 . ld %r11,xxx+16@toc@l(%r11)
3963 . bctr
3964
3965 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
3966 code to adjust the value and save r2 to support multiple toc sections.
3967 A ppc_stub_long_branch with an r2 offset looks like:
3968 . std %r2,40(%r1)
3969 . addis %r2,%r2,off@ha
3970 . addi %r2,%r2,off@l
3971 . b dest
3972
3973 A ppc_stub_plt_branch with an r2 offset looks like:
3974 . std %r2,40(%r1)
3975 . addis %r11,%r2,xxx@toc@ha
3976 . ld %r12,xxx@toc@l(%r11)
3977 . addis %r2,%r2,off@ha
3978 . addi %r2,%r2,off@l
3979 . mtctr %r12
3980 . bctr
3981
3982 In cases where the "addis" instruction would add zero, the "addis" is
3983 omitted and following instructions modified slightly in some cases.
3984 */
3985
3986 enum ppc_stub_type {
3987 ppc_stub_none,
3988 ppc_stub_long_branch,
3989 ppc_stub_long_branch_r2off,
3990 ppc_stub_plt_branch,
3991 ppc_stub_plt_branch_r2off,
3992 ppc_stub_plt_call,
3993 ppc_stub_plt_call_r2save,
3994 ppc_stub_global_entry,
3995 ppc_stub_save_res
3996 };
3997
3998 /* Information on stub grouping. */
3999 struct map_stub
4000 {
4001 /* The stub section. */
4002 asection *stub_sec;
4003 /* This is the section to which stubs in the group will be attached. */
4004 asection *link_sec;
4005 /* Next group. */
4006 struct map_stub *next;
4007 /* Whether to emit a copy of register save/restore functions in this
4008 group. */
4009 int needs_save_res;
4010 /* The offset of the __tls_get_addr_opt plt stub bctrl in this group,
4011 or -1u if no such stub with bctrl exists. */
4012 unsigned int tls_get_addr_opt_bctrl;
4013 };
4014
4015 struct ppc_stub_hash_entry {
4016
4017 /* Base hash table entry structure. */
4018 struct bfd_hash_entry root;
4019
4020 enum ppc_stub_type stub_type;
4021
4022 /* Group information. */
4023 struct map_stub *group;
4024
4025 /* Offset within stub_sec of the beginning of this stub. */
4026 bfd_vma stub_offset;
4027
4028 /* Given the symbol's value and its section we can determine its final
4029 value when building the stubs (so the stub knows where to jump. */
4030 bfd_vma target_value;
4031 asection *target_section;
4032
4033 /* The symbol table entry, if any, that this was derived from. */
4034 struct ppc_link_hash_entry *h;
4035 struct plt_entry *plt_ent;
4036
4037 /* Symbol type. */
4038 unsigned char symtype;
4039
4040 /* Symbol st_other. */
4041 unsigned char other;
4042 };
4043
4044 struct ppc_branch_hash_entry {
4045
4046 /* Base hash table entry structure. */
4047 struct bfd_hash_entry root;
4048
4049 /* Offset within branch lookup table. */
4050 unsigned int offset;
4051
4052 /* Generation marker. */
4053 unsigned int iter;
4054 };
4055
4056 /* Used to track dynamic relocations for local symbols. */
4057 struct ppc_dyn_relocs
4058 {
4059 struct ppc_dyn_relocs *next;
4060
4061 /* The input section of the reloc. */
4062 asection *sec;
4063
4064 /* Total number of relocs copied for the input section. */
4065 unsigned int count : 31;
4066
4067 /* Whether this entry is for STT_GNU_IFUNC symbols. */
4068 unsigned int ifunc : 1;
4069 };
4070
4071 struct ppc_link_hash_entry
4072 {
4073 struct elf_link_hash_entry elf;
4074
4075 union {
4076 /* A pointer to the most recently used stub hash entry against this
4077 symbol. */
4078 struct ppc_stub_hash_entry *stub_cache;
4079
4080 /* A pointer to the next symbol starting with a '.' */
4081 struct ppc_link_hash_entry *next_dot_sym;
4082 } u;
4083
4084 /* Track dynamic relocs copied for this symbol. */
4085 struct elf_dyn_relocs *dyn_relocs;
4086
4087 /* Link between function code and descriptor symbols. */
4088 struct ppc_link_hash_entry *oh;
4089
4090 /* Flag function code and descriptor symbols. */
4091 unsigned int is_func:1;
4092 unsigned int is_func_descriptor:1;
4093 unsigned int fake:1;
4094
4095 /* Whether global opd/toc sym has been adjusted or not.
4096 After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
4097 should be set for all globals defined in any opd/toc section. */
4098 unsigned int adjust_done:1;
4099
4100 /* Set if this is an out-of-line register save/restore function,
4101 with non-standard calling convention. */
4102 unsigned int save_res:1;
4103
4104 /* Set if a duplicate symbol with non-zero localentry is detected,
4105 even when the duplicate symbol does not provide a definition. */
4106 unsigned int non_zero_localentry:1;
4107
4108 /* Contexts in which symbol is used in the GOT (or TOC).
4109 Bits are or'd into the mask as the corresponding relocs are
4110 encountered during check_relocs, with TLS_TLS being set when any
4111 of the other TLS bits are set. tls_optimize clears bits when
4112 optimizing to indicate the corresponding GOT entry type is not
4113 needed. If set, TLS_TLS is never cleared. tls_optimize may also
4114 set TLS_TPRELGD when a GD reloc turns into a TPREL one. We use a
4115 separate flag rather than setting TPREL just for convenience in
4116 distinguishing the two cases.
4117 These flags are also kept for local symbols. */
4118 #define TLS_TLS 1 /* Any TLS reloc. */
4119 #define TLS_GD 2 /* GD reloc. */
4120 #define TLS_LD 4 /* LD reloc. */
4121 #define TLS_TPREL 8 /* TPREL reloc, => IE. */
4122 #define TLS_DTPREL 16 /* DTPREL reloc, => LD. */
4123 #define TLS_MARK 32 /* __tls_get_addr call marked. */
4124 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
4125 #define TLS_EXPLICIT 128 /* Marks TOC section TLS relocs. */
4126 unsigned char tls_mask;
4127
4128 /* The above field is also used to mark function symbols. In which
4129 case TLS_TLS will be 0. */
4130 #define PLT_IFUNC 2 /* STT_GNU_IFUNC. */
4131 #define PLT_KEEP 4 /* inline plt call requires plt entry. */
4132 #define NON_GOT 256 /* local symbol plt, not stored. */
4133 };
4134
4135 /* ppc64 ELF linker hash table. */
4136
4137 struct ppc_link_hash_table
4138 {
4139 struct elf_link_hash_table elf;
4140
4141 /* The stub hash table. */
4142 struct bfd_hash_table stub_hash_table;
4143
4144 /* Another hash table for plt_branch stubs. */
4145 struct bfd_hash_table branch_hash_table;
4146
4147 /* Hash table for function prologue tocsave. */
4148 htab_t tocsave_htab;
4149
4150 /* Various options and other info passed from the linker. */
4151 struct ppc64_elf_params *params;
4152
4153 /* The size of sec_info below. */
4154 unsigned int sec_info_arr_size;
4155
4156 /* Per-section array of extra section info. Done this way rather
4157 than as part of ppc64_elf_section_data so we have the info for
4158 non-ppc64 sections. */
4159 struct
4160 {
4161 /* Along with elf_gp, specifies the TOC pointer used by this section. */
4162 bfd_vma toc_off;
4163
4164 union
4165 {
4166 /* The section group that this section belongs to. */
4167 struct map_stub *group;
4168 /* A temp section list pointer. */
4169 asection *list;
4170 } u;
4171 } *sec_info;
4172
4173 /* Linked list of groups. */
4174 struct map_stub *group;
4175
4176 /* Temp used when calculating TOC pointers. */
4177 bfd_vma toc_curr;
4178 bfd *toc_bfd;
4179 asection *toc_first_sec;
4180
4181 /* Used when adding symbols. */
4182 struct ppc_link_hash_entry *dot_syms;
4183
4184 /* Shortcuts to get to dynamic linker sections. */
4185 asection *glink;
4186 asection *global_entry;
4187 asection *sfpr;
4188 asection *pltlocal;
4189 asection *relpltlocal;
4190 asection *brlt;
4191 asection *relbrlt;
4192 asection *glink_eh_frame;
4193
4194 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
4195 struct ppc_link_hash_entry *tls_get_addr;
4196 struct ppc_link_hash_entry *tls_get_addr_fd;
4197
4198 /* The size of reliplt used by got entry relocs. */
4199 bfd_size_type got_reli_size;
4200
4201 /* Statistics. */
4202 unsigned long stub_count[ppc_stub_global_entry];
4203
4204 /* Number of stubs against global syms. */
4205 unsigned long stub_globals;
4206
4207 /* Set if we're linking code with function descriptors. */
4208 unsigned int opd_abi:1;
4209
4210 /* Support for multiple toc sections. */
4211 unsigned int do_multi_toc:1;
4212 unsigned int multi_toc_needed:1;
4213 unsigned int second_toc_pass:1;
4214 unsigned int do_toc_opt:1;
4215
4216 /* Set if tls optimization is enabled. */
4217 unsigned int do_tls_opt:1;
4218
4219 /* Set if inline plt calls should be converted to direct calls. */
4220 unsigned int can_convert_all_inline_plt:1;
4221
4222 /* Set on error. */
4223 unsigned int stub_error:1;
4224
4225 /* Whether func_desc_adjust needs to be run over symbols. */
4226 unsigned int need_func_desc_adj:1;
4227
4228 /* Whether there exist local gnu indirect function resolvers,
4229 referenced by dynamic relocations. */
4230 unsigned int local_ifunc_resolver:1;
4231 unsigned int maybe_local_ifunc_resolver:1;
4232
4233 /* Whether plt calls for ELFv2 localentry:0 funcs have been optimized. */
4234 unsigned int has_plt_localentry0:1;
4235
4236 /* Incremented every time we size stubs. */
4237 unsigned int stub_iteration;
4238
4239 /* Small local sym cache. */
4240 struct sym_cache sym_cache;
4241 };
4242
4243 /* Rename some of the generic section flags to better document how they
4244 are used here. */
4245
4246 /* Nonzero if this section has TLS related relocations. */
4247 #define has_tls_reloc sec_flg0
4248
4249 /* Nonzero if this section has an old-style call to __tls_get_addr. */
4250 #define has_tls_get_addr_call sec_flg1
4251
4252 /* Nonzero if this section has any toc or got relocs. */
4253 #define has_toc_reloc sec_flg2
4254
4255 /* Nonzero if this section has a call to another section that uses
4256 the toc or got. */
4257 #define makes_toc_func_call sec_flg3
4258
4259 /* Recursion protection when determining above flag. */
4260 #define call_check_in_progress sec_flg4
4261 #define call_check_done sec_flg5
4262
4263 /* Get the ppc64 ELF linker hash table from a link_info structure. */
4264
4265 #define ppc_hash_table(p) \
4266 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
4267 == PPC64_ELF_DATA ? ((struct ppc_link_hash_table *) ((p)->hash)) : NULL)
4268
4269 #define ppc_stub_hash_lookup(table, string, create, copy) \
4270 ((struct ppc_stub_hash_entry *) \
4271 bfd_hash_lookup ((table), (string), (create), (copy)))
4272
4273 #define ppc_branch_hash_lookup(table, string, create, copy) \
4274 ((struct ppc_branch_hash_entry *) \
4275 bfd_hash_lookup ((table), (string), (create), (copy)))
4276
4277 /* Create an entry in the stub hash table. */
4278
4279 static struct bfd_hash_entry *
4280 stub_hash_newfunc (struct bfd_hash_entry *entry,
4281 struct bfd_hash_table *table,
4282 const char *string)
4283 {
4284 /* Allocate the structure if it has not already been allocated by a
4285 subclass. */
4286 if (entry == NULL)
4287 {
4288 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
4289 if (entry == NULL)
4290 return entry;
4291 }
4292
4293 /* Call the allocation method of the superclass. */
4294 entry = bfd_hash_newfunc (entry, table, string);
4295 if (entry != NULL)
4296 {
4297 struct ppc_stub_hash_entry *eh;
4298
4299 /* Initialize the local fields. */
4300 eh = (struct ppc_stub_hash_entry *) entry;
4301 eh->stub_type = ppc_stub_none;
4302 eh->group = NULL;
4303 eh->stub_offset = 0;
4304 eh->target_value = 0;
4305 eh->target_section = NULL;
4306 eh->h = NULL;
4307 eh->plt_ent = NULL;
4308 eh->other = 0;
4309 }
4310
4311 return entry;
4312 }
4313
4314 /* Create an entry in the branch hash table. */
4315
4316 static struct bfd_hash_entry *
4317 branch_hash_newfunc (struct bfd_hash_entry *entry,
4318 struct bfd_hash_table *table,
4319 const char *string)
4320 {
4321 /* Allocate the structure if it has not already been allocated by a
4322 subclass. */
4323 if (entry == NULL)
4324 {
4325 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
4326 if (entry == NULL)
4327 return entry;
4328 }
4329
4330 /* Call the allocation method of the superclass. */
4331 entry = bfd_hash_newfunc (entry, table, string);
4332 if (entry != NULL)
4333 {
4334 struct ppc_branch_hash_entry *eh;
4335
4336 /* Initialize the local fields. */
4337 eh = (struct ppc_branch_hash_entry *) entry;
4338 eh->offset = 0;
4339 eh->iter = 0;
4340 }
4341
4342 return entry;
4343 }
4344
4345 /* Create an entry in a ppc64 ELF linker hash table. */
4346
4347 static struct bfd_hash_entry *
4348 link_hash_newfunc (struct bfd_hash_entry *entry,
4349 struct bfd_hash_table *table,
4350 const char *string)
4351 {
4352 /* Allocate the structure if it has not already been allocated by a
4353 subclass. */
4354 if (entry == NULL)
4355 {
4356 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
4357 if (entry == NULL)
4358 return entry;
4359 }
4360
4361 /* Call the allocation method of the superclass. */
4362 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
4363 if (entry != NULL)
4364 {
4365 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
4366
4367 memset (&eh->u.stub_cache, 0,
4368 (sizeof (struct ppc_link_hash_entry)
4369 - offsetof (struct ppc_link_hash_entry, u.stub_cache)));
4370
4371 /* When making function calls, old ABI code references function entry
4372 points (dot symbols), while new ABI code references the function
4373 descriptor symbol. We need to make any combination of reference and
4374 definition work together, without breaking archive linking.
4375
4376 For a defined function "foo" and an undefined call to "bar":
4377 An old object defines "foo" and ".foo", references ".bar" (possibly
4378 "bar" too).
4379 A new object defines "foo" and references "bar".
4380
4381 A new object thus has no problem with its undefined symbols being
4382 satisfied by definitions in an old object. On the other hand, the
4383 old object won't have ".bar" satisfied by a new object.
4384
4385 Keep a list of newly added dot-symbols. */
4386
4387 if (string[0] == '.')
4388 {
4389 struct ppc_link_hash_table *htab;
4390
4391 htab = (struct ppc_link_hash_table *) table;
4392 eh->u.next_dot_sym = htab->dot_syms;
4393 htab->dot_syms = eh;
4394 }
4395 }
4396
4397 return entry;
4398 }
4399
4400 struct tocsave_entry {
4401 asection *sec;
4402 bfd_vma offset;
4403 };
4404
4405 static hashval_t
4406 tocsave_htab_hash (const void *p)
4407 {
4408 const struct tocsave_entry *e = (const struct tocsave_entry *) p;
4409 return ((bfd_vma) (intptr_t) e->sec ^ e->offset) >> 3;
4410 }
4411
4412 static int
4413 tocsave_htab_eq (const void *p1, const void *p2)
4414 {
4415 const struct tocsave_entry *e1 = (const struct tocsave_entry *) p1;
4416 const struct tocsave_entry *e2 = (const struct tocsave_entry *) p2;
4417 return e1->sec == e2->sec && e1->offset == e2->offset;
4418 }
4419
4420 /* Destroy a ppc64 ELF linker hash table. */
4421
4422 static void
4423 ppc64_elf_link_hash_table_free (bfd *obfd)
4424 {
4425 struct ppc_link_hash_table *htab;
4426
4427 htab = (struct ppc_link_hash_table *) obfd->link.hash;
4428 if (htab->tocsave_htab)
4429 htab_delete (htab->tocsave_htab);
4430 bfd_hash_table_free (&htab->branch_hash_table);
4431 bfd_hash_table_free (&htab->stub_hash_table);
4432 _bfd_elf_link_hash_table_free (obfd);
4433 }
4434
4435 /* Create a ppc64 ELF linker hash table. */
4436
4437 static struct bfd_link_hash_table *
4438 ppc64_elf_link_hash_table_create (bfd *abfd)
4439 {
4440 struct ppc_link_hash_table *htab;
4441 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
4442
4443 htab = bfd_zmalloc (amt);
4444 if (htab == NULL)
4445 return NULL;
4446
4447 if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc,
4448 sizeof (struct ppc_link_hash_entry),
4449 PPC64_ELF_DATA))
4450 {
4451 free (htab);
4452 return NULL;
4453 }
4454
4455 /* Init the stub hash table too. */
4456 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc,
4457 sizeof (struct ppc_stub_hash_entry)))
4458 {
4459 _bfd_elf_link_hash_table_free (abfd);
4460 return NULL;
4461 }
4462
4463 /* And the branch hash table. */
4464 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc,
4465 sizeof (struct ppc_branch_hash_entry)))
4466 {
4467 bfd_hash_table_free (&htab->stub_hash_table);
4468 _bfd_elf_link_hash_table_free (abfd);
4469 return NULL;
4470 }
4471
4472 htab->tocsave_htab = htab_try_create (1024,
4473 tocsave_htab_hash,
4474 tocsave_htab_eq,
4475 NULL);
4476 if (htab->tocsave_htab == NULL)
4477 {
4478 ppc64_elf_link_hash_table_free (abfd);
4479 return NULL;
4480 }
4481 htab->elf.root.hash_table_free = ppc64_elf_link_hash_table_free;
4482
4483 /* Initializing two fields of the union is just cosmetic. We really
4484 only care about glist, but when compiled on a 32-bit host the
4485 bfd_vma fields are larger. Setting the bfd_vma to zero makes
4486 debugger inspection of these fields look nicer. */
4487 htab->elf.init_got_refcount.refcount = 0;
4488 htab->elf.init_got_refcount.glist = NULL;
4489 htab->elf.init_plt_refcount.refcount = 0;
4490 htab->elf.init_plt_refcount.glist = NULL;
4491 htab->elf.init_got_offset.offset = 0;
4492 htab->elf.init_got_offset.glist = NULL;
4493 htab->elf.init_plt_offset.offset = 0;
4494 htab->elf.init_plt_offset.glist = NULL;
4495
4496 return &htab->elf.root;
4497 }
4498
4499 /* Create sections for linker generated code. */
4500
4501 static bfd_boolean
4502 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
4503 {
4504 struct ppc_link_hash_table *htab;
4505 flagword flags;
4506
4507 htab = ppc_hash_table (info);
4508
4509 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
4510 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4511 if (htab->params->save_restore_funcs)
4512 {
4513 /* Create .sfpr for code to save and restore fp regs. */
4514 htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr",
4515 flags);
4516 if (htab->sfpr == NULL
4517 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
4518 return FALSE;
4519 }
4520
4521 if (bfd_link_relocatable (info))
4522 return TRUE;
4523
4524 /* Create .glink for lazy dynamic linking support. */
4525 htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink",
4526 flags);
4527 if (htab->glink == NULL
4528 || ! bfd_set_section_alignment (dynobj, htab->glink, 3))
4529 return FALSE;
4530
4531 /* The part of .glink used by global entry stubs, separate so that
4532 it can be aligned appropriately without affecting htab->glink. */
4533 htab->global_entry = bfd_make_section_anyway_with_flags (dynobj, ".glink",
4534 flags);
4535 if (htab->global_entry == NULL
4536 || ! bfd_set_section_alignment (dynobj, htab->global_entry, 2))
4537 return FALSE;
4538
4539 if (!info->no_ld_generated_unwind_info)
4540 {
4541 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
4542 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4543 htab->glink_eh_frame = bfd_make_section_anyway_with_flags (dynobj,
4544 ".eh_frame",
4545 flags);
4546 if (htab->glink_eh_frame == NULL
4547 || !bfd_set_section_alignment (dynobj, htab->glink_eh_frame, 2))
4548 return FALSE;
4549 }
4550
4551 flags = SEC_ALLOC | SEC_LINKER_CREATED;
4552 htab->elf.iplt = bfd_make_section_anyway_with_flags (dynobj, ".iplt", flags);
4553 if (htab->elf.iplt == NULL
4554 || ! bfd_set_section_alignment (dynobj, htab->elf.iplt, 3))
4555 return FALSE;
4556
4557 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4558 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4559 htab->elf.irelplt
4560 = bfd_make_section_anyway_with_flags (dynobj, ".rela.iplt", flags);
4561 if (htab->elf.irelplt == NULL
4562 || ! bfd_set_section_alignment (dynobj, htab->elf.irelplt, 3))
4563 return FALSE;
4564
4565 /* Create branch lookup table for plt_branch stubs. */
4566 flags = (SEC_ALLOC | SEC_LOAD
4567 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4568 htab->brlt = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt",
4569 flags);
4570 if (htab->brlt == NULL
4571 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
4572 return FALSE;
4573
4574 /* Local plt entries, put in .branch_lt but a separate section for
4575 convenience. */
4576 htab->pltlocal = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt",
4577 flags);
4578 if (htab->pltlocal == NULL
4579 || ! bfd_set_section_alignment (dynobj, htab->pltlocal, 3))
4580 return FALSE;
4581
4582 if (!bfd_link_pic (info))
4583 return TRUE;
4584
4585 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4586 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4587 htab->relbrlt
4588 = bfd_make_section_anyway_with_flags (dynobj, ".rela.branch_lt", flags);
4589 if (htab->relbrlt == NULL
4590 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
4591 return FALSE;
4592
4593 htab->relpltlocal
4594 = bfd_make_section_anyway_with_flags (dynobj, ".rela.branch_lt", flags);
4595 if (htab->relpltlocal == NULL
4596 || ! bfd_set_section_alignment (dynobj, htab->relpltlocal, 3))
4597 return FALSE;
4598
4599 return TRUE;
4600 }
4601
4602 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
4603
4604 bfd_boolean
4605 ppc64_elf_init_stub_bfd (struct bfd_link_info *info,
4606 struct ppc64_elf_params *params)
4607 {
4608 struct ppc_link_hash_table *htab;
4609
4610 elf_elfheader (params->stub_bfd)->e_ident[EI_CLASS] = ELFCLASS64;
4611
4612 /* Always hook our dynamic sections into the first bfd, which is the
4613 linker created stub bfd. This ensures that the GOT header is at
4614 the start of the output TOC section. */
4615 htab = ppc_hash_table (info);
4616 htab->elf.dynobj = params->stub_bfd;
4617 htab->params = params;
4618
4619 return create_linkage_sections (htab->elf.dynobj, info);
4620 }
4621
4622 /* Build a name for an entry in the stub hash table. */
4623
4624 static char *
4625 ppc_stub_name (const asection *input_section,
4626 const asection *sym_sec,
4627 const struct ppc_link_hash_entry *h,
4628 const Elf_Internal_Rela *rel)
4629 {
4630 char *stub_name;
4631 ssize_t len;
4632
4633 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
4634 offsets from a sym as a branch target? In fact, we could
4635 probably assume the addend is always zero. */
4636 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
4637
4638 if (h)
4639 {
4640 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
4641 stub_name = bfd_malloc (len);
4642 if (stub_name == NULL)
4643 return stub_name;
4644
4645 len = sprintf (stub_name, "%08x.%s+%x",
4646 input_section->id & 0xffffffff,
4647 h->elf.root.root.string,
4648 (int) rel->r_addend & 0xffffffff);
4649 }
4650 else
4651 {
4652 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
4653 stub_name = bfd_malloc (len);
4654 if (stub_name == NULL)
4655 return stub_name;
4656
4657 len = sprintf (stub_name, "%08x.%x:%x+%x",
4658 input_section->id & 0xffffffff,
4659 sym_sec->id & 0xffffffff,
4660 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
4661 (int) rel->r_addend & 0xffffffff);
4662 }
4663 if (len > 2 && stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
4664 stub_name[len - 2] = 0;
4665 return stub_name;
4666 }
4667
4668 /* Look up an entry in the stub hash. Stub entries are cached because
4669 creating the stub name takes a bit of time. */
4670
4671 static struct ppc_stub_hash_entry *
4672 ppc_get_stub_entry (const asection *input_section,
4673 const asection *sym_sec,
4674 struct ppc_link_hash_entry *h,
4675 const Elf_Internal_Rela *rel,
4676 struct ppc_link_hash_table *htab)
4677 {
4678 struct ppc_stub_hash_entry *stub_entry;
4679 struct map_stub *group;
4680
4681 /* If this input section is part of a group of sections sharing one
4682 stub section, then use the id of the first section in the group.
4683 Stub names need to include a section id, as there may well be
4684 more than one stub used to reach say, printf, and we need to
4685 distinguish between them. */
4686 group = htab->sec_info[input_section->id].u.group;
4687 if (group == NULL)
4688 return NULL;
4689
4690 if (h != NULL && h->u.stub_cache != NULL
4691 && h->u.stub_cache->h == h
4692 && h->u.stub_cache->group == group)
4693 {
4694 stub_entry = h->u.stub_cache;
4695 }
4696 else
4697 {
4698 char *stub_name;
4699
4700 stub_name = ppc_stub_name (group->link_sec, sym_sec, h, rel);
4701 if (stub_name == NULL)
4702 return NULL;
4703
4704 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
4705 stub_name, FALSE, FALSE);
4706 if (h != NULL)
4707 h->u.stub_cache = stub_entry;
4708
4709 free (stub_name);
4710 }
4711
4712 return stub_entry;
4713 }
4714
4715 /* Add a new stub entry to the stub hash. Not all fields of the new
4716 stub entry are initialised. */
4717
4718 static struct ppc_stub_hash_entry *
4719 ppc_add_stub (const char *stub_name,
4720 asection *section,
4721 struct bfd_link_info *info)
4722 {
4723 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4724 struct map_stub *group;
4725 asection *link_sec;
4726 asection *stub_sec;
4727 struct ppc_stub_hash_entry *stub_entry;
4728
4729 group = htab->sec_info[section->id].u.group;
4730 link_sec = group->link_sec;
4731 stub_sec = group->stub_sec;
4732 if (stub_sec == NULL)
4733 {
4734 size_t namelen;
4735 bfd_size_type len;
4736 char *s_name;
4737
4738 namelen = strlen (link_sec->name);
4739 len = namelen + sizeof (STUB_SUFFIX);
4740 s_name = bfd_alloc (htab->params->stub_bfd, len);
4741 if (s_name == NULL)
4742 return NULL;
4743
4744 memcpy (s_name, link_sec->name, namelen);
4745 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
4746 stub_sec = (*htab->params->add_stub_section) (s_name, link_sec);
4747 if (stub_sec == NULL)
4748 return NULL;
4749 group->stub_sec = stub_sec;
4750 }
4751
4752 /* Enter this entry into the linker stub hash table. */
4753 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
4754 TRUE, FALSE);
4755 if (stub_entry == NULL)
4756 {
4757 /* xgettext:c-format */
4758 _bfd_error_handler (_("%pB: cannot create stub entry %s"),
4759 section->owner, stub_name);
4760 return NULL;
4761 }
4762
4763 stub_entry->group = group;
4764 stub_entry->stub_offset = 0;
4765 return stub_entry;
4766 }
4767
4768 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
4769 not already done. */
4770
4771 static bfd_boolean
4772 create_got_section (bfd *abfd, struct bfd_link_info *info)
4773 {
4774 asection *got, *relgot;
4775 flagword flags;
4776 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4777
4778 if (!is_ppc64_elf (abfd))
4779 return FALSE;
4780 if (htab == NULL)
4781 return FALSE;
4782
4783 if (!htab->elf.sgot
4784 && !_bfd_elf_create_got_section (htab->elf.dynobj, info))
4785 return FALSE;
4786
4787 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
4788 | SEC_LINKER_CREATED);
4789
4790 got = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
4791 if (!got
4792 || !bfd_set_section_alignment (abfd, got, 3))
4793 return FALSE;
4794
4795 relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got",
4796 flags | SEC_READONLY);
4797 if (!relgot
4798 || ! bfd_set_section_alignment (abfd, relgot, 3))
4799 return FALSE;
4800
4801 ppc64_elf_tdata (abfd)->got = got;
4802 ppc64_elf_tdata (abfd)->relgot = relgot;
4803 return TRUE;
4804 }
4805
4806 /* Follow indirect and warning symbol links. */
4807
4808 static inline struct bfd_link_hash_entry *
4809 follow_link (struct bfd_link_hash_entry *h)
4810 {
4811 while (h->type == bfd_link_hash_indirect
4812 || h->type == bfd_link_hash_warning)
4813 h = h->u.i.link;
4814 return h;
4815 }
4816
4817 static inline struct elf_link_hash_entry *
4818 elf_follow_link (struct elf_link_hash_entry *h)
4819 {
4820 return (struct elf_link_hash_entry *) follow_link (&h->root);
4821 }
4822
4823 static inline struct ppc_link_hash_entry *
4824 ppc_follow_link (struct ppc_link_hash_entry *h)
4825 {
4826 return (struct ppc_link_hash_entry *) follow_link (&h->elf.root);
4827 }
4828
4829 /* Merge PLT info on FROM with that on TO. */
4830
4831 static void
4832 move_plt_plist (struct ppc_link_hash_entry *from,
4833 struct ppc_link_hash_entry *to)
4834 {
4835 if (from->elf.plt.plist != NULL)
4836 {
4837 if (to->elf.plt.plist != NULL)
4838 {
4839 struct plt_entry **entp;
4840 struct plt_entry *ent;
4841
4842 for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; )
4843 {
4844 struct plt_entry *dent;
4845
4846 for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next)
4847 if (dent->addend == ent->addend)
4848 {
4849 dent->plt.refcount += ent->plt.refcount;
4850 *entp = ent->next;
4851 break;
4852 }
4853 if (dent == NULL)
4854 entp = &ent->next;
4855 }
4856 *entp = to->elf.plt.plist;
4857 }
4858
4859 to->elf.plt.plist = from->elf.plt.plist;
4860 from->elf.plt.plist = NULL;
4861 }
4862 }
4863
4864 /* Copy the extra info we tack onto an elf_link_hash_entry. */
4865
4866 static void
4867 ppc64_elf_copy_indirect_symbol (struct bfd_link_info *info,
4868 struct elf_link_hash_entry *dir,
4869 struct elf_link_hash_entry *ind)
4870 {
4871 struct ppc_link_hash_entry *edir, *eind;
4872
4873 edir = (struct ppc_link_hash_entry *) dir;
4874 eind = (struct ppc_link_hash_entry *) ind;
4875
4876 edir->is_func |= eind->is_func;
4877 edir->is_func_descriptor |= eind->is_func_descriptor;
4878 edir->tls_mask |= eind->tls_mask;
4879 if (eind->oh != NULL)
4880 edir->oh = ppc_follow_link (eind->oh);
4881
4882 if (edir->elf.versioned != versioned_hidden)
4883 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
4884 edir->elf.ref_regular |= eind->elf.ref_regular;
4885 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
4886 edir->elf.non_got_ref |= eind->elf.non_got_ref;
4887 edir->elf.needs_plt |= eind->elf.needs_plt;
4888 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed;
4889
4890 /* If we were called to copy over info for a weak sym, don't copy
4891 dyn_relocs, plt/got info, or dynindx. We used to copy dyn_relocs
4892 in order to simplify readonly_dynrelocs and save a field in the
4893 symbol hash entry, but that means dyn_relocs can't be used in any
4894 tests about a specific symbol, or affect other symbol flags which
4895 are then tested. */
4896 if (eind->elf.root.type != bfd_link_hash_indirect)
4897 return;
4898
4899 /* Copy over any dynamic relocs we may have on the indirect sym. */
4900 if (eind->dyn_relocs != NULL)
4901 {
4902 if (edir->dyn_relocs != NULL)
4903 {
4904 struct elf_dyn_relocs **pp;
4905 struct elf_dyn_relocs *p;
4906
4907 /* Add reloc counts against the indirect sym to the direct sym
4908 list. Merge any entries against the same section. */
4909 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
4910 {
4911 struct elf_dyn_relocs *q;
4912
4913 for (q = edir->dyn_relocs; q != NULL; q = q->next)
4914 if (q->sec == p->sec)
4915 {
4916 q->pc_count += p->pc_count;
4917 q->count += p->count;
4918 *pp = p->next;
4919 break;
4920 }
4921 if (q == NULL)
4922 pp = &p->next;
4923 }
4924 *pp = edir->dyn_relocs;
4925 }
4926
4927 edir->dyn_relocs = eind->dyn_relocs;
4928 eind->dyn_relocs = NULL;
4929 }
4930
4931 /* Copy over got entries that we may have already seen to the
4932 symbol which just became indirect. */
4933 if (eind->elf.got.glist != NULL)
4934 {
4935 if (edir->elf.got.glist != NULL)
4936 {
4937 struct got_entry **entp;
4938 struct got_entry *ent;
4939
4940 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
4941 {
4942 struct got_entry *dent;
4943
4944 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
4945 if (dent->addend == ent->addend
4946 && dent->owner == ent->owner
4947 && dent->tls_type == ent->tls_type)
4948 {
4949 dent->got.refcount += ent->got.refcount;
4950 *entp = ent->next;
4951 break;
4952 }
4953 if (dent == NULL)
4954 entp = &ent->next;
4955 }
4956 *entp = edir->elf.got.glist;
4957 }
4958
4959 edir->elf.got.glist = eind->elf.got.glist;
4960 eind->elf.got.glist = NULL;
4961 }
4962
4963 /* And plt entries. */
4964 move_plt_plist (eind, edir);
4965
4966 if (eind->elf.dynindx != -1)
4967 {
4968 if (edir->elf.dynindx != -1)
4969 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4970 edir->elf.dynstr_index);
4971 edir->elf.dynindx = eind->elf.dynindx;
4972 edir->elf.dynstr_index = eind->elf.dynstr_index;
4973 eind->elf.dynindx = -1;
4974 eind->elf.dynstr_index = 0;
4975 }
4976 }
4977
4978 /* Find the function descriptor hash entry from the given function code
4979 hash entry FH. Link the entries via their OH fields. */
4980
4981 static struct ppc_link_hash_entry *
4982 lookup_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
4983 {
4984 struct ppc_link_hash_entry *fdh = fh->oh;
4985
4986 if (fdh == NULL)
4987 {
4988 const char *fd_name = fh->elf.root.root.string + 1;
4989
4990 fdh = (struct ppc_link_hash_entry *)
4991 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
4992 if (fdh == NULL)
4993 return fdh;
4994
4995 fdh->is_func_descriptor = 1;
4996 fdh->oh = fh;
4997 fh->is_func = 1;
4998 fh->oh = fdh;
4999 }
5000
5001 fdh = ppc_follow_link (fdh);
5002 fdh->is_func_descriptor = 1;
5003 fdh->oh = fh;
5004 return fdh;
5005 }
5006
5007 /* Make a fake function descriptor sym for the undefined code sym FH. */
5008
5009 static struct ppc_link_hash_entry *
5010 make_fdh (struct bfd_link_info *info,
5011 struct ppc_link_hash_entry *fh)
5012 {
5013 bfd *abfd = fh->elf.root.u.undef.abfd;
5014 struct bfd_link_hash_entry *bh = NULL;
5015 struct ppc_link_hash_entry *fdh;
5016 flagword flags = (fh->elf.root.type == bfd_link_hash_undefweak
5017 ? BSF_WEAK
5018 : BSF_GLOBAL);
5019
5020 if (!_bfd_generic_link_add_one_symbol (info, abfd,
5021 fh->elf.root.root.string + 1,
5022 flags, bfd_und_section_ptr, 0,
5023 NULL, FALSE, FALSE, &bh))
5024 return NULL;
5025
5026 fdh = (struct ppc_link_hash_entry *) bh;
5027 fdh->elf.non_elf = 0;
5028 fdh->fake = 1;
5029 fdh->is_func_descriptor = 1;
5030 fdh->oh = fh;
5031 fh->is_func = 1;
5032 fh->oh = fdh;
5033 return fdh;
5034 }
5035
5036 /* Fix function descriptor symbols defined in .opd sections to be
5037 function type. */
5038
5039 static bfd_boolean
5040 ppc64_elf_add_symbol_hook (bfd *ibfd,
5041 struct bfd_link_info *info,
5042 Elf_Internal_Sym *isym,
5043 const char **name,
5044 flagword *flags ATTRIBUTE_UNUSED,
5045 asection **sec,
5046 bfd_vma *value)
5047 {
5048 if (*sec != NULL
5049 && strcmp ((*sec)->name, ".opd") == 0)
5050 {
5051 asection *code_sec;
5052
5053 if (!(ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC
5054 || ELF_ST_TYPE (isym->st_info) == STT_FUNC))
5055 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
5056
5057 /* If the symbol is a function defined in .opd, and the function
5058 code is in a discarded group, let it appear to be undefined. */
5059 if (!bfd_link_relocatable (info)
5060 && (*sec)->reloc_count != 0
5061 && opd_entry_value (*sec, *value, &code_sec, NULL,
5062 FALSE) != (bfd_vma) -1
5063 && discarded_section (code_sec))
5064 {
5065 *sec = bfd_und_section_ptr;
5066 isym->st_shndx = SHN_UNDEF;
5067 }
5068 }
5069 else if (*sec != NULL
5070 && strcmp ((*sec)->name, ".toc") == 0
5071 && ELF_ST_TYPE (isym->st_info) == STT_OBJECT)
5072 {
5073 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5074 if (htab != NULL)
5075 htab->params->object_in_toc = 1;
5076 }
5077
5078 if ((STO_PPC64_LOCAL_MASK & isym->st_other) != 0)
5079 {
5080 if (abiversion (ibfd) == 0)
5081 set_abiversion (ibfd, 2);
5082 else if (abiversion (ibfd) == 1)
5083 {
5084 _bfd_error_handler (_("symbol '%s' has invalid st_other"
5085 " for ABI version 1"), *name);
5086 bfd_set_error (bfd_error_bad_value);
5087 return FALSE;
5088 }
5089 }
5090
5091 return TRUE;
5092 }
5093
5094 /* Merge non-visibility st_other attributes: local entry point. */
5095
5096 static void
5097 ppc64_elf_merge_symbol_attribute (struct elf_link_hash_entry *h,
5098 const Elf_Internal_Sym *isym,
5099 bfd_boolean definition,
5100 bfd_boolean dynamic)
5101 {
5102 if (definition && (!dynamic || !h->def_regular))
5103 h->other = ((isym->st_other & ~ELF_ST_VISIBILITY (-1))
5104 | ELF_ST_VISIBILITY (h->other));
5105 }
5106
5107 /* Hook called on merging a symbol. We use this to clear "fake" since
5108 we now have a real symbol. */
5109
5110 static bfd_boolean
5111 ppc64_elf_merge_symbol (struct elf_link_hash_entry *h,
5112 const Elf_Internal_Sym *isym,
5113 asection **psec ATTRIBUTE_UNUSED,
5114 bfd_boolean newdef ATTRIBUTE_UNUSED,
5115 bfd_boolean olddef ATTRIBUTE_UNUSED,
5116 bfd *oldbfd ATTRIBUTE_UNUSED,
5117 const asection *oldsec ATTRIBUTE_UNUSED)
5118 {
5119 ((struct ppc_link_hash_entry *) h)->fake = 0;
5120 if ((STO_PPC64_LOCAL_MASK & isym->st_other) != 0)
5121 ((struct ppc_link_hash_entry *) h)->non_zero_localentry = 1;
5122 return TRUE;
5123 }
5124
5125 /* This function makes an old ABI object reference to ".bar" cause the
5126 inclusion of a new ABI object archive that defines "bar".
5127 NAME is a symbol defined in an archive. Return a symbol in the hash
5128 table that might be satisfied by the archive symbols. */
5129
5130 static struct elf_link_hash_entry *
5131 ppc64_elf_archive_symbol_lookup (bfd *abfd,
5132 struct bfd_link_info *info,
5133 const char *name)
5134 {
5135 struct elf_link_hash_entry *h;
5136 char *dot_name;
5137 size_t len;
5138
5139 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
5140 if (h != NULL
5141 /* Don't return this sym if it is a fake function descriptor
5142 created by add_symbol_adjust. */
5143 && !((struct ppc_link_hash_entry *) h)->fake)
5144 return h;
5145
5146 if (name[0] == '.')
5147 return h;
5148
5149 len = strlen (name);
5150 dot_name = bfd_alloc (abfd, len + 2);
5151 if (dot_name == NULL)
5152 return (struct elf_link_hash_entry *) -1;
5153 dot_name[0] = '.';
5154 memcpy (dot_name + 1, name, len + 1);
5155 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
5156 bfd_release (abfd, dot_name);
5157 return h;
5158 }
5159
5160 /* This function satisfies all old ABI object references to ".bar" if a
5161 new ABI object defines "bar". Well, at least, undefined dot symbols
5162 are made weak. This stops later archive searches from including an
5163 object if we already have a function descriptor definition. It also
5164 prevents the linker complaining about undefined symbols.
5165 We also check and correct mismatched symbol visibility here. The
5166 most restrictive visibility of the function descriptor and the
5167 function entry symbol is used. */
5168
5169 static bfd_boolean
5170 add_symbol_adjust (struct ppc_link_hash_entry *eh, struct bfd_link_info *info)
5171 {
5172 struct ppc_link_hash_table *htab;
5173 struct ppc_link_hash_entry *fdh;
5174
5175 if (eh->elf.root.type == bfd_link_hash_warning)
5176 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
5177
5178 if (eh->elf.root.type == bfd_link_hash_indirect)
5179 return TRUE;
5180
5181 if (eh->elf.root.root.string[0] != '.')
5182 abort ();
5183
5184 htab = ppc_hash_table (info);
5185 if (htab == NULL)
5186 return FALSE;
5187
5188 fdh = lookup_fdh (eh, htab);
5189 if (fdh == NULL
5190 && !bfd_link_relocatable (info)
5191 && (eh->elf.root.type == bfd_link_hash_undefined
5192 || eh->elf.root.type == bfd_link_hash_undefweak)
5193 && eh->elf.ref_regular)
5194 {
5195 /* Make an undefined function descriptor sym, in order to
5196 pull in an --as-needed shared lib. Archives are handled
5197 elsewhere. */
5198 fdh = make_fdh (info, eh);
5199 if (fdh == NULL)
5200 return FALSE;
5201 }
5202
5203 if (fdh != NULL)
5204 {
5205 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
5206 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
5207
5208 /* Make both descriptor and entry symbol have the most
5209 constraining visibility of either symbol. */
5210 if (entry_vis < descr_vis)
5211 fdh->elf.other += entry_vis - descr_vis;
5212 else if (entry_vis > descr_vis)
5213 eh->elf.other += descr_vis - entry_vis;
5214
5215 /* Propagate reference flags from entry symbol to function
5216 descriptor symbol. */
5217 fdh->elf.root.non_ir_ref_regular |= eh->elf.root.non_ir_ref_regular;
5218 fdh->elf.root.non_ir_ref_dynamic |= eh->elf.root.non_ir_ref_dynamic;
5219 fdh->elf.ref_regular |= eh->elf.ref_regular;
5220 fdh->elf.ref_regular_nonweak |= eh->elf.ref_regular_nonweak;
5221
5222 if (!fdh->elf.forced_local
5223 && fdh->elf.dynindx == -1
5224 && fdh->elf.versioned != versioned_hidden
5225 && (bfd_link_dll (info)
5226 || fdh->elf.def_dynamic
5227 || fdh->elf.ref_dynamic)
5228 && (eh->elf.ref_regular
5229 || eh->elf.def_regular))
5230 {
5231 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
5232 return FALSE;
5233 }
5234 }
5235
5236 return TRUE;
5237 }
5238
5239 /* Set up opd section info and abiversion for IBFD, and process list
5240 of dot-symbols we made in link_hash_newfunc. */
5241
5242 static bfd_boolean
5243 ppc64_elf_before_check_relocs (bfd *ibfd, struct bfd_link_info *info)
5244 {
5245 struct ppc_link_hash_table *htab;
5246 struct ppc_link_hash_entry **p, *eh;
5247 asection *opd = bfd_get_section_by_name (ibfd, ".opd");
5248
5249 if (opd != NULL && opd->size != 0)
5250 {
5251 BFD_ASSERT (ppc64_elf_section_data (opd)->sec_type == sec_normal);
5252 ppc64_elf_section_data (opd)->sec_type = sec_opd;
5253
5254 if (abiversion (ibfd) == 0)
5255 set_abiversion (ibfd, 1);
5256 else if (abiversion (ibfd) >= 2)
5257 {
5258 /* xgettext:c-format */
5259 _bfd_error_handler (_("%pB .opd not allowed in ABI version %d"),
5260 ibfd, abiversion (ibfd));
5261 bfd_set_error (bfd_error_bad_value);
5262 return FALSE;
5263 }
5264 }
5265
5266 if (is_ppc64_elf (info->output_bfd))
5267 {
5268 /* For input files without an explicit abiversion in e_flags
5269 we should have flagged any with symbol st_other bits set
5270 as ELFv1 and above flagged those with .opd as ELFv2.
5271 Set the output abiversion if not yet set, and for any input
5272 still ambiguous, take its abiversion from the output.
5273 Differences in ABI are reported later. */
5274 if (abiversion (info->output_bfd) == 0)
5275 set_abiversion (info->output_bfd, abiversion (ibfd));
5276 else if (abiversion (ibfd) == 0)
5277 set_abiversion (ibfd, abiversion (info->output_bfd));
5278 }
5279
5280 htab = ppc_hash_table (info);
5281 if (htab == NULL)
5282 return TRUE;
5283
5284 if (opd != NULL && opd->size != 0
5285 && (ibfd->flags & DYNAMIC) == 0
5286 && (opd->flags & SEC_RELOC) != 0
5287 && opd->reloc_count != 0
5288 && !bfd_is_abs_section (opd->output_section)
5289 && info->gc_sections)
5290 {
5291 /* Garbage collection needs some extra help with .opd sections.
5292 We don't want to necessarily keep everything referenced by
5293 relocs in .opd, as that would keep all functions. Instead,
5294 if we reference an .opd symbol (a function descriptor), we
5295 want to keep the function code symbol's section. This is
5296 easy for global symbols, but for local syms we need to keep
5297 information about the associated function section. */
5298 bfd_size_type amt;
5299 asection **opd_sym_map;
5300 Elf_Internal_Shdr *symtab_hdr;
5301 Elf_Internal_Rela *relocs, *rel_end, *rel;
5302
5303 amt = OPD_NDX (opd->size) * sizeof (*opd_sym_map);
5304 opd_sym_map = bfd_zalloc (ibfd, amt);
5305 if (opd_sym_map == NULL)
5306 return FALSE;
5307 ppc64_elf_section_data (opd)->u.opd.func_sec = opd_sym_map;
5308 relocs = _bfd_elf_link_read_relocs (ibfd, opd, NULL, NULL,
5309 info->keep_memory);
5310 if (relocs == NULL)
5311 return FALSE;
5312 symtab_hdr = &elf_symtab_hdr (ibfd);
5313 rel_end = relocs + opd->reloc_count - 1;
5314 for (rel = relocs; rel < rel_end; rel++)
5315 {
5316 enum elf_ppc64_reloc_type r_type = ELF64_R_TYPE (rel->r_info);
5317 unsigned long r_symndx = ELF64_R_SYM (rel->r_info);
5318
5319 if (r_type == R_PPC64_ADDR64
5320 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC
5321 && r_symndx < symtab_hdr->sh_info)
5322 {
5323 Elf_Internal_Sym *isym;
5324 asection *s;
5325
5326 isym = bfd_sym_from_r_symndx (&htab->sym_cache, ibfd, r_symndx);
5327 if (isym == NULL)
5328 {
5329 if (elf_section_data (opd)->relocs != relocs)
5330 free (relocs);
5331 return FALSE;
5332 }
5333
5334 s = bfd_section_from_elf_index (ibfd, isym->st_shndx);
5335 if (s != NULL && s != opd)
5336 opd_sym_map[OPD_NDX (rel->r_offset)] = s;
5337 }
5338 }
5339 if (elf_section_data (opd)->relocs != relocs)
5340 free (relocs);
5341 }
5342
5343 p = &htab->dot_syms;
5344 while ((eh = *p) != NULL)
5345 {
5346 *p = NULL;
5347 if (&eh->elf == htab->elf.hgot)
5348 ;
5349 else if (htab->elf.hgot == NULL
5350 && strcmp (eh->elf.root.root.string, ".TOC.") == 0)
5351 htab->elf.hgot = &eh->elf;
5352 else if (abiversion (ibfd) <= 1)
5353 {
5354 htab->need_func_desc_adj = 1;
5355 if (!add_symbol_adjust (eh, info))
5356 return FALSE;
5357 }
5358 p = &eh->u.next_dot_sym;
5359 }
5360 return TRUE;
5361 }
5362
5363 /* Undo hash table changes when an --as-needed input file is determined
5364 not to be needed. */
5365
5366 static bfd_boolean
5367 ppc64_elf_notice_as_needed (bfd *ibfd,
5368 struct bfd_link_info *info,
5369 enum notice_asneeded_action act)
5370 {
5371 if (act == notice_not_needed)
5372 {
5373 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5374
5375 if (htab == NULL)
5376 return FALSE;
5377
5378 htab->dot_syms = NULL;
5379 }
5380 return _bfd_elf_notice_as_needed (ibfd, info, act);
5381 }
5382
5383 /* If --just-symbols against a final linked binary, then assume we need
5384 toc adjusting stubs when calling functions defined there. */
5385
5386 static void
5387 ppc64_elf_link_just_syms (asection *sec, struct bfd_link_info *info)
5388 {
5389 if ((sec->flags & SEC_CODE) != 0
5390 && (sec->owner->flags & (EXEC_P | DYNAMIC)) != 0
5391 && is_ppc64_elf (sec->owner))
5392 {
5393 if (abiversion (sec->owner) >= 2
5394 || bfd_get_section_by_name (sec->owner, ".opd") != NULL)
5395 sec->has_toc_reloc = 1;
5396 }
5397 _bfd_elf_link_just_syms (sec, info);
5398 }
5399
5400 static struct plt_entry **
5401 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
5402 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
5403 {
5404 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
5405 struct plt_entry **local_plt;
5406 unsigned char *local_got_tls_masks;
5407
5408 if (local_got_ents == NULL)
5409 {
5410 bfd_size_type size = symtab_hdr->sh_info;
5411
5412 size *= (sizeof (*local_got_ents)
5413 + sizeof (*local_plt)
5414 + sizeof (*local_got_tls_masks));
5415 local_got_ents = bfd_zalloc (abfd, size);
5416 if (local_got_ents == NULL)
5417 return NULL;
5418 elf_local_got_ents (abfd) = local_got_ents;
5419 }
5420
5421 if ((tls_type & (NON_GOT | TLS_EXPLICIT)) == 0)
5422 {
5423 struct got_entry *ent;
5424
5425 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
5426 if (ent->addend == r_addend
5427 && ent->owner == abfd
5428 && ent->tls_type == tls_type)
5429 break;
5430 if (ent == NULL)
5431 {
5432 bfd_size_type amt = sizeof (*ent);
5433 ent = bfd_alloc (abfd, amt);
5434 if (ent == NULL)
5435 return FALSE;
5436 ent->next = local_got_ents[r_symndx];
5437 ent->addend = r_addend;
5438 ent->owner = abfd;
5439 ent->tls_type = tls_type;
5440 ent->is_indirect = FALSE;
5441 ent->got.refcount = 0;
5442 local_got_ents[r_symndx] = ent;
5443 }
5444 ent->got.refcount += 1;
5445 }
5446
5447 local_plt = (struct plt_entry **) (local_got_ents + symtab_hdr->sh_info);
5448 local_got_tls_masks = (unsigned char *) (local_plt + symtab_hdr->sh_info);
5449 local_got_tls_masks[r_symndx] |= tls_type & 0xff;
5450
5451 return local_plt + r_symndx;
5452 }
5453
5454 static bfd_boolean
5455 update_plt_info (bfd *abfd, struct plt_entry **plist, bfd_vma addend)
5456 {
5457 struct plt_entry *ent;
5458
5459 for (ent = *plist; ent != NULL; ent = ent->next)
5460 if (ent->addend == addend)
5461 break;
5462 if (ent == NULL)
5463 {
5464 bfd_size_type amt = sizeof (*ent);
5465 ent = bfd_alloc (abfd, amt);
5466 if (ent == NULL)
5467 return FALSE;
5468 ent->next = *plist;
5469 ent->addend = addend;
5470 ent->plt.refcount = 0;
5471 *plist = ent;
5472 }
5473 ent->plt.refcount += 1;
5474 return TRUE;
5475 }
5476
5477 static bfd_boolean
5478 is_branch_reloc (enum elf_ppc64_reloc_type r_type)
5479 {
5480 return (r_type == R_PPC64_REL24
5481 || r_type == R_PPC64_REL14
5482 || r_type == R_PPC64_REL14_BRTAKEN
5483 || r_type == R_PPC64_REL14_BRNTAKEN
5484 || r_type == R_PPC64_ADDR24
5485 || r_type == R_PPC64_ADDR14
5486 || r_type == R_PPC64_ADDR14_BRTAKEN
5487 || r_type == R_PPC64_ADDR14_BRNTAKEN
5488 || r_type == R_PPC64_PLTCALL);
5489 }
5490
5491 /* Relocs on inline plt call sequence insns prior to the call. */
5492
5493 static bfd_boolean
5494 is_plt_seq_reloc (enum elf_ppc64_reloc_type r_type)
5495 {
5496 return (r_type == R_PPC64_PLT16_HA
5497 || r_type == R_PPC64_PLT16_HI
5498 || r_type == R_PPC64_PLT16_LO
5499 || r_type == R_PPC64_PLT16_LO_DS
5500 || r_type == R_PPC64_PLTSEQ);
5501 }
5502
5503 /* Look through the relocs for a section during the first phase, and
5504 calculate needed space in the global offset table, procedure
5505 linkage table, and dynamic reloc sections. */
5506
5507 static bfd_boolean
5508 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
5509 asection *sec, const Elf_Internal_Rela *relocs)
5510 {
5511 struct ppc_link_hash_table *htab;
5512 Elf_Internal_Shdr *symtab_hdr;
5513 struct elf_link_hash_entry **sym_hashes;
5514 const Elf_Internal_Rela *rel;
5515 const Elf_Internal_Rela *rel_end;
5516 asection *sreloc;
5517 struct elf_link_hash_entry *tga, *dottga;
5518 bfd_boolean is_opd;
5519
5520 if (bfd_link_relocatable (info))
5521 return TRUE;
5522
5523 /* Don't do anything special with non-loaded, non-alloced sections.
5524 In particular, any relocs in such sections should not affect GOT
5525 and PLT reference counting (ie. we don't allow them to create GOT
5526 or PLT entries), there's no possibility or desire to optimize TLS
5527 relocs, and there's not much point in propagating relocs to shared
5528 libs that the dynamic linker won't relocate. */
5529 if ((sec->flags & SEC_ALLOC) == 0)
5530 return TRUE;
5531
5532 BFD_ASSERT (is_ppc64_elf (abfd));
5533
5534 htab = ppc_hash_table (info);
5535 if (htab == NULL)
5536 return FALSE;
5537
5538 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
5539 FALSE, FALSE, TRUE);
5540 dottga = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
5541 FALSE, FALSE, TRUE);
5542 symtab_hdr = &elf_symtab_hdr (abfd);
5543 sym_hashes = elf_sym_hashes (abfd);
5544 sreloc = NULL;
5545 is_opd = ppc64_elf_section_data (sec)->sec_type == sec_opd;
5546 rel_end = relocs + sec->reloc_count;
5547 for (rel = relocs; rel < rel_end; rel++)
5548 {
5549 unsigned long r_symndx;
5550 struct elf_link_hash_entry *h;
5551 enum elf_ppc64_reloc_type r_type;
5552 int tls_type;
5553 struct _ppc64_elf_section_data *ppc64_sec;
5554 struct plt_entry **ifunc, **plt_list;
5555
5556 r_symndx = ELF64_R_SYM (rel->r_info);
5557 if (r_symndx < symtab_hdr->sh_info)
5558 h = NULL;
5559 else
5560 {
5561 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5562 h = elf_follow_link (h);
5563
5564 if (h == htab->elf.hgot)
5565 sec->has_toc_reloc = 1;
5566 }
5567
5568 tls_type = 0;
5569 ifunc = NULL;
5570 if (h != NULL)
5571 {
5572 if (h->type == STT_GNU_IFUNC)
5573 {
5574 h->needs_plt = 1;
5575 ifunc = &h->plt.plist;
5576 }
5577 }
5578 else
5579 {
5580 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5581 abfd, r_symndx);
5582 if (isym == NULL)
5583 return FALSE;
5584
5585 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
5586 {
5587 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
5588 rel->r_addend,
5589 NON_GOT | PLT_IFUNC);
5590 if (ifunc == NULL)
5591 return FALSE;
5592 }
5593 }
5594
5595 r_type = ELF64_R_TYPE (rel->r_info);
5596 switch (r_type)
5597 {
5598 case R_PPC64_TLSGD:
5599 case R_PPC64_TLSLD:
5600 /* These special tls relocs tie a call to __tls_get_addr with
5601 its parameter symbol. */
5602 if (h != NULL)
5603 ((struct ppc_link_hash_entry *) h)->tls_mask |= TLS_TLS | TLS_MARK;
5604 else
5605 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5606 rel->r_addend,
5607 NON_GOT | TLS_TLS | TLS_MARK))
5608 return FALSE;
5609 sec->has_tls_reloc = 1;
5610 break;
5611
5612 case R_PPC64_GOT_TLSLD16:
5613 case R_PPC64_GOT_TLSLD16_LO:
5614 case R_PPC64_GOT_TLSLD16_HI:
5615 case R_PPC64_GOT_TLSLD16_HA:
5616 tls_type = TLS_TLS | TLS_LD;
5617 goto dogottls;
5618
5619 case R_PPC64_GOT_TLSGD16:
5620 case R_PPC64_GOT_TLSGD16_LO:
5621 case R_PPC64_GOT_TLSGD16_HI:
5622 case R_PPC64_GOT_TLSGD16_HA:
5623 tls_type = TLS_TLS | TLS_GD;
5624 goto dogottls;
5625
5626 case R_PPC64_GOT_TPREL16_DS:
5627 case R_PPC64_GOT_TPREL16_LO_DS:
5628 case R_PPC64_GOT_TPREL16_HI:
5629 case R_PPC64_GOT_TPREL16_HA:
5630 if (bfd_link_dll (info))
5631 info->flags |= DF_STATIC_TLS;
5632 tls_type = TLS_TLS | TLS_TPREL;
5633 goto dogottls;
5634
5635 case R_PPC64_GOT_DTPREL16_DS:
5636 case R_PPC64_GOT_DTPREL16_LO_DS:
5637 case R_PPC64_GOT_DTPREL16_HI:
5638 case R_PPC64_GOT_DTPREL16_HA:
5639 tls_type = TLS_TLS | TLS_DTPREL;
5640 dogottls:
5641 sec->has_tls_reloc = 1;
5642 /* Fall through */
5643
5644 case R_PPC64_GOT16:
5645 case R_PPC64_GOT16_DS:
5646 case R_PPC64_GOT16_HA:
5647 case R_PPC64_GOT16_HI:
5648 case R_PPC64_GOT16_LO:
5649 case R_PPC64_GOT16_LO_DS:
5650 /* This symbol requires a global offset table entry. */
5651 sec->has_toc_reloc = 1;
5652 if (r_type == R_PPC64_GOT_TLSLD16
5653 || r_type == R_PPC64_GOT_TLSGD16
5654 || r_type == R_PPC64_GOT_TPREL16_DS
5655 || r_type == R_PPC64_GOT_DTPREL16_DS
5656 || r_type == R_PPC64_GOT16
5657 || r_type == R_PPC64_GOT16_DS)
5658 {
5659 htab->do_multi_toc = 1;
5660 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5661 }
5662
5663 if (ppc64_elf_tdata (abfd)->got == NULL
5664 && !create_got_section (abfd, info))
5665 return FALSE;
5666
5667 if (h != NULL)
5668 {
5669 struct ppc_link_hash_entry *eh;
5670 struct got_entry *ent;
5671
5672 eh = (struct ppc_link_hash_entry *) h;
5673 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
5674 if (ent->addend == rel->r_addend
5675 && ent->owner == abfd
5676 && ent->tls_type == tls_type)
5677 break;
5678 if (ent == NULL)
5679 {
5680 bfd_size_type amt = sizeof (*ent);
5681 ent = bfd_alloc (abfd, amt);
5682 if (ent == NULL)
5683 return FALSE;
5684 ent->next = eh->elf.got.glist;
5685 ent->addend = rel->r_addend;
5686 ent->owner = abfd;
5687 ent->tls_type = tls_type;
5688 ent->is_indirect = FALSE;
5689 ent->got.refcount = 0;
5690 eh->elf.got.glist = ent;
5691 }
5692 ent->got.refcount += 1;
5693 eh->tls_mask |= tls_type;
5694 }
5695 else
5696 /* This is a global offset table entry for a local symbol. */
5697 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5698 rel->r_addend, tls_type))
5699 return FALSE;
5700
5701 /* We may also need a plt entry if the symbol turns out to be
5702 an ifunc. */
5703 if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1)
5704 {
5705 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5706 return FALSE;
5707 }
5708 break;
5709
5710 case R_PPC64_PLT16_HA:
5711 case R_PPC64_PLT16_HI:
5712 case R_PPC64_PLT16_LO:
5713 case R_PPC64_PLT16_LO_DS:
5714 case R_PPC64_PLT32:
5715 case R_PPC64_PLT64:
5716 /* This symbol requires a procedure linkage table entry. */
5717 plt_list = ifunc;
5718 if (h != NULL)
5719 {
5720 h->needs_plt = 1;
5721 if (h->root.root.string[0] == '.'
5722 && h->root.root.string[1] != '\0')
5723 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5724 ((struct ppc_link_hash_entry *) h)->tls_mask |= PLT_KEEP;
5725 plt_list = &h->plt.plist;
5726 }
5727 if (plt_list == NULL)
5728 plt_list = update_local_sym_info (abfd, symtab_hdr, r_symndx,
5729 rel->r_addend,
5730 NON_GOT | PLT_KEEP);
5731 if (!update_plt_info (abfd, plt_list, rel->r_addend))
5732 return FALSE;
5733 break;
5734
5735 /* The following relocations don't need to propagate the
5736 relocation if linking a shared object since they are
5737 section relative. */
5738 case R_PPC64_SECTOFF:
5739 case R_PPC64_SECTOFF_LO:
5740 case R_PPC64_SECTOFF_HI:
5741 case R_PPC64_SECTOFF_HA:
5742 case R_PPC64_SECTOFF_DS:
5743 case R_PPC64_SECTOFF_LO_DS:
5744 case R_PPC64_DTPREL16:
5745 case R_PPC64_DTPREL16_LO:
5746 case R_PPC64_DTPREL16_HI:
5747 case R_PPC64_DTPREL16_HA:
5748 case R_PPC64_DTPREL16_DS:
5749 case R_PPC64_DTPREL16_LO_DS:
5750 case R_PPC64_DTPREL16_HIGH:
5751 case R_PPC64_DTPREL16_HIGHA:
5752 case R_PPC64_DTPREL16_HIGHER:
5753 case R_PPC64_DTPREL16_HIGHERA:
5754 case R_PPC64_DTPREL16_HIGHEST:
5755 case R_PPC64_DTPREL16_HIGHESTA:
5756 break;
5757
5758 /* Nor do these. */
5759 case R_PPC64_REL16:
5760 case R_PPC64_REL16_LO:
5761 case R_PPC64_REL16_HI:
5762 case R_PPC64_REL16_HA:
5763 case R_PPC64_REL16DX_HA:
5764 break;
5765
5766 /* Not supported as a dynamic relocation. */
5767 case R_PPC64_ADDR64_LOCAL:
5768 if (bfd_link_pic (info))
5769 {
5770 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
5771 ppc_howto_init ();
5772 /* xgettext:c-format */
5773 info->callbacks->einfo (_("%H: %s reloc unsupported "
5774 "in shared libraries and PIEs\n"),
5775 abfd, sec, rel->r_offset,
5776 ppc64_elf_howto_table[r_type]->name);
5777 bfd_set_error (bfd_error_bad_value);
5778 return FALSE;
5779 }
5780 break;
5781
5782 case R_PPC64_TOC16:
5783 case R_PPC64_TOC16_DS:
5784 htab->do_multi_toc = 1;
5785 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5786 /* Fall through. */
5787 case R_PPC64_TOC16_LO:
5788 case R_PPC64_TOC16_HI:
5789 case R_PPC64_TOC16_HA:
5790 case R_PPC64_TOC16_LO_DS:
5791 sec->has_toc_reloc = 1;
5792 break;
5793
5794 /* Marker reloc. */
5795 case R_PPC64_ENTRY:
5796 break;
5797
5798 /* This relocation describes the C++ object vtable hierarchy.
5799 Reconstruct it for later use during GC. */
5800 case R_PPC64_GNU_VTINHERIT:
5801 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
5802 return FALSE;
5803 break;
5804
5805 /* This relocation describes which C++ vtable entries are actually
5806 used. Record for later use during GC. */
5807 case R_PPC64_GNU_VTENTRY:
5808 BFD_ASSERT (h != NULL);
5809 if (h != NULL
5810 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
5811 return FALSE;
5812 break;
5813
5814 case R_PPC64_REL14:
5815 case R_PPC64_REL14_BRTAKEN:
5816 case R_PPC64_REL14_BRNTAKEN:
5817 {
5818 asection *dest = NULL;
5819
5820 /* Heuristic: If jumping outside our section, chances are
5821 we are going to need a stub. */
5822 if (h != NULL)
5823 {
5824 /* If the sym is weak it may be overridden later, so
5825 don't assume we know where a weak sym lives. */
5826 if (h->root.type == bfd_link_hash_defined)
5827 dest = h->root.u.def.section;
5828 }
5829 else
5830 {
5831 Elf_Internal_Sym *isym;
5832
5833 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5834 abfd, r_symndx);
5835 if (isym == NULL)
5836 return FALSE;
5837
5838 dest = bfd_section_from_elf_index (abfd, isym->st_shndx);
5839 }
5840
5841 if (dest != sec)
5842 ppc64_elf_section_data (sec)->has_14bit_branch = 1;
5843 }
5844 goto rel24;
5845
5846 case R_PPC64_PLTCALL:
5847 ppc64_elf_section_data (sec)->has_pltcall = 1;
5848 /* Fall through. */
5849
5850 case R_PPC64_REL24:
5851 rel24:
5852 plt_list = ifunc;
5853 if (h != NULL)
5854 {
5855 h->needs_plt = 1;
5856 if (h->root.root.string[0] == '.'
5857 && h->root.root.string[1] != '\0')
5858 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5859
5860 if (h == tga || h == dottga)
5861 {
5862 sec->has_tls_reloc = 1;
5863 if (rel != relocs
5864 && (ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSGD
5865 || ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSLD))
5866 /* We have a new-style __tls_get_addr call with
5867 a marker reloc. */
5868 ;
5869 else
5870 /* Mark this section as having an old-style call. */
5871 sec->has_tls_get_addr_call = 1;
5872 }
5873 plt_list = &h->plt.plist;
5874 }
5875
5876 /* We may need a .plt entry if the function this reloc
5877 refers to is in a shared lib. */
5878 if (plt_list
5879 && !update_plt_info (abfd, plt_list, rel->r_addend))
5880 return FALSE;
5881 break;
5882
5883 case R_PPC64_ADDR14:
5884 case R_PPC64_ADDR14_BRNTAKEN:
5885 case R_PPC64_ADDR14_BRTAKEN:
5886 case R_PPC64_ADDR24:
5887 goto dodyn;
5888
5889 case R_PPC64_TPREL64:
5890 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
5891 if (bfd_link_dll (info))
5892 info->flags |= DF_STATIC_TLS;
5893 goto dotlstoc;
5894
5895 case R_PPC64_DTPMOD64:
5896 if (rel + 1 < rel_end
5897 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
5898 && rel[1].r_offset == rel->r_offset + 8)
5899 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
5900 else
5901 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
5902 goto dotlstoc;
5903
5904 case R_PPC64_DTPREL64:
5905 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
5906 if (rel != relocs
5907 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
5908 && rel[-1].r_offset == rel->r_offset - 8)
5909 /* This is the second reloc of a dtpmod, dtprel pair.
5910 Don't mark with TLS_DTPREL. */
5911 goto dodyn;
5912
5913 dotlstoc:
5914 sec->has_tls_reloc = 1;
5915 if (h != NULL)
5916 {
5917 struct ppc_link_hash_entry *eh;
5918 eh = (struct ppc_link_hash_entry *) h;
5919 eh->tls_mask |= tls_type;
5920 }
5921 else
5922 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5923 rel->r_addend, tls_type))
5924 return FALSE;
5925
5926 ppc64_sec = ppc64_elf_section_data (sec);
5927 if (ppc64_sec->sec_type != sec_toc)
5928 {
5929 bfd_size_type amt;
5930
5931 /* One extra to simplify get_tls_mask. */
5932 amt = sec->size * sizeof (unsigned) / 8 + sizeof (unsigned);
5933 ppc64_sec->u.toc.symndx = bfd_zalloc (abfd, amt);
5934 if (ppc64_sec->u.toc.symndx == NULL)
5935 return FALSE;
5936 amt = sec->size * sizeof (bfd_vma) / 8;
5937 ppc64_sec->u.toc.add = bfd_zalloc (abfd, amt);
5938 if (ppc64_sec->u.toc.add == NULL)
5939 return FALSE;
5940 BFD_ASSERT (ppc64_sec->sec_type == sec_normal);
5941 ppc64_sec->sec_type = sec_toc;
5942 }
5943 BFD_ASSERT (rel->r_offset % 8 == 0);
5944 ppc64_sec->u.toc.symndx[rel->r_offset / 8] = r_symndx;
5945 ppc64_sec->u.toc.add[rel->r_offset / 8] = rel->r_addend;
5946
5947 /* Mark the second slot of a GD or LD entry.
5948 -1 to indicate GD and -2 to indicate LD. */
5949 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
5950 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -1;
5951 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
5952 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -2;
5953 goto dodyn;
5954
5955 case R_PPC64_TPREL16:
5956 case R_PPC64_TPREL16_LO:
5957 case R_PPC64_TPREL16_HI:
5958 case R_PPC64_TPREL16_HA:
5959 case R_PPC64_TPREL16_DS:
5960 case R_PPC64_TPREL16_LO_DS:
5961 case R_PPC64_TPREL16_HIGH:
5962 case R_PPC64_TPREL16_HIGHA:
5963 case R_PPC64_TPREL16_HIGHER:
5964 case R_PPC64_TPREL16_HIGHERA:
5965 case R_PPC64_TPREL16_HIGHEST:
5966 case R_PPC64_TPREL16_HIGHESTA:
5967 if (bfd_link_dll (info))
5968 info->flags |= DF_STATIC_TLS;
5969 goto dodyn;
5970
5971 case R_PPC64_ADDR64:
5972 if (is_opd
5973 && rel + 1 < rel_end
5974 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
5975 {
5976 if (h != NULL)
5977 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5978 }
5979 /* Fall through. */
5980
5981 case R_PPC64_ADDR16:
5982 case R_PPC64_ADDR16_DS:
5983 case R_PPC64_ADDR16_HA:
5984 case R_PPC64_ADDR16_HI:
5985 case R_PPC64_ADDR16_HIGH:
5986 case R_PPC64_ADDR16_HIGHA:
5987 case R_PPC64_ADDR16_HIGHER:
5988 case R_PPC64_ADDR16_HIGHERA:
5989 case R_PPC64_ADDR16_HIGHEST:
5990 case R_PPC64_ADDR16_HIGHESTA:
5991 case R_PPC64_ADDR16_LO:
5992 case R_PPC64_ADDR16_LO_DS:
5993 if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1
5994 && rel->r_addend == 0)
5995 {
5996 /* We may need a .plt entry if this reloc refers to a
5997 function in a shared lib. */
5998 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5999 return FALSE;
6000 h->pointer_equality_needed = 1;
6001 }
6002 /* Fall through. */
6003
6004 case R_PPC64_REL30:
6005 case R_PPC64_REL32:
6006 case R_PPC64_REL64:
6007 case R_PPC64_ADDR32:
6008 case R_PPC64_UADDR16:
6009 case R_PPC64_UADDR32:
6010 case R_PPC64_UADDR64:
6011 case R_PPC64_TOC:
6012 if (h != NULL && !bfd_link_pic (info))
6013 /* We may need a copy reloc. */
6014 h->non_got_ref = 1;
6015
6016 /* Don't propagate .opd relocs. */
6017 if (NO_OPD_RELOCS && is_opd)
6018 break;
6019
6020 /* If we are creating a shared library, and this is a reloc
6021 against a global symbol, or a non PC relative reloc
6022 against a local symbol, then we need to copy the reloc
6023 into the shared library. However, if we are linking with
6024 -Bsymbolic, we do not need to copy a reloc against a
6025 global symbol which is defined in an object we are
6026 including in the link (i.e., DEF_REGULAR is set). At
6027 this point we have not seen all the input files, so it is
6028 possible that DEF_REGULAR is not set now but will be set
6029 later (it is never cleared). In case of a weak definition,
6030 DEF_REGULAR may be cleared later by a strong definition in
6031 a shared library. We account for that possibility below by
6032 storing information in the dyn_relocs field of the hash
6033 table entry. A similar situation occurs when creating
6034 shared libraries and symbol visibility changes render the
6035 symbol local.
6036
6037 If on the other hand, we are creating an executable, we
6038 may need to keep relocations for symbols satisfied by a
6039 dynamic library if we manage to avoid copy relocs for the
6040 symbol. */
6041 dodyn:
6042 if ((bfd_link_pic (info)
6043 && (must_be_dyn_reloc (info, r_type)
6044 || (h != NULL
6045 && (!SYMBOLIC_BIND (info, h)
6046 || h->root.type == bfd_link_hash_defweak
6047 || !h->def_regular))))
6048 || (ELIMINATE_COPY_RELOCS
6049 && !bfd_link_pic (info)
6050 && h != NULL
6051 && (h->root.type == bfd_link_hash_defweak
6052 || !h->def_regular))
6053 || (!bfd_link_pic (info)
6054 && ifunc != NULL))
6055 {
6056 /* We must copy these reloc types into the output file.
6057 Create a reloc section in dynobj and make room for
6058 this reloc. */
6059 if (sreloc == NULL)
6060 {
6061 sreloc = _bfd_elf_make_dynamic_reloc_section
6062 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
6063
6064 if (sreloc == NULL)
6065 return FALSE;
6066 }
6067
6068 /* If this is a global symbol, we count the number of
6069 relocations we need for this symbol. */
6070 if (h != NULL)
6071 {
6072 struct elf_dyn_relocs *p;
6073 struct elf_dyn_relocs **head;
6074
6075 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
6076 p = *head;
6077 if (p == NULL || p->sec != sec)
6078 {
6079 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
6080 if (p == NULL)
6081 return FALSE;
6082 p->next = *head;
6083 *head = p;
6084 p->sec = sec;
6085 p->count = 0;
6086 p->pc_count = 0;
6087 }
6088 p->count += 1;
6089 if (!must_be_dyn_reloc (info, r_type))
6090 p->pc_count += 1;
6091 }
6092 else
6093 {
6094 /* Track dynamic relocs needed for local syms too.
6095 We really need local syms available to do this
6096 easily. Oh well. */
6097 struct ppc_dyn_relocs *p;
6098 struct ppc_dyn_relocs **head;
6099 bfd_boolean is_ifunc;
6100 asection *s;
6101 void *vpp;
6102 Elf_Internal_Sym *isym;
6103
6104 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
6105 abfd, r_symndx);
6106 if (isym == NULL)
6107 return FALSE;
6108
6109 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
6110 if (s == NULL)
6111 s = sec;
6112
6113 vpp = &elf_section_data (s)->local_dynrel;
6114 head = (struct ppc_dyn_relocs **) vpp;
6115 is_ifunc = ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC;
6116 p = *head;
6117 if (p != NULL && p->sec == sec && p->ifunc != is_ifunc)
6118 p = p->next;
6119 if (p == NULL || p->sec != sec || p->ifunc != is_ifunc)
6120 {
6121 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
6122 if (p == NULL)
6123 return FALSE;
6124 p->next = *head;
6125 *head = p;
6126 p->sec = sec;
6127 p->ifunc = is_ifunc;
6128 p->count = 0;
6129 }
6130 p->count += 1;
6131 }
6132 }
6133 break;
6134
6135 default:
6136 break;
6137 }
6138 }
6139
6140 return TRUE;
6141 }
6142
6143 /* Merge backend specific data from an object file to the output
6144 object file when linking. */
6145
6146 static bfd_boolean
6147 ppc64_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
6148 {
6149 bfd *obfd = info->output_bfd;
6150 unsigned long iflags, oflags;
6151
6152 if ((ibfd->flags & BFD_LINKER_CREATED) != 0)
6153 return TRUE;
6154
6155 if (!is_ppc64_elf (ibfd) || !is_ppc64_elf (obfd))
6156 return TRUE;
6157
6158 if (!_bfd_generic_verify_endian_match (ibfd, info))
6159 return FALSE;
6160
6161 iflags = elf_elfheader (ibfd)->e_flags;
6162 oflags = elf_elfheader (obfd)->e_flags;
6163
6164 if (iflags & ~EF_PPC64_ABI)
6165 {
6166 _bfd_error_handler
6167 /* xgettext:c-format */
6168 (_("%pB uses unknown e_flags 0x%lx"), ibfd, iflags);
6169 bfd_set_error (bfd_error_bad_value);
6170 return FALSE;
6171 }
6172 else if (iflags != oflags && iflags != 0)
6173 {
6174 _bfd_error_handler
6175 /* xgettext:c-format */
6176 (_("%pB: ABI version %ld is not compatible with ABI version %ld output"),
6177 ibfd, iflags, oflags);
6178 bfd_set_error (bfd_error_bad_value);
6179 return FALSE;
6180 }
6181
6182 if (!_bfd_elf_ppc_merge_fp_attributes (ibfd, info))
6183 return FALSE;
6184
6185 /* Merge Tag_compatibility attributes and any common GNU ones. */
6186 return _bfd_elf_merge_object_attributes (ibfd, info);
6187 }
6188
6189 static bfd_boolean
6190 ppc64_elf_print_private_bfd_data (bfd *abfd, void *ptr)
6191 {
6192 /* Print normal ELF private data. */
6193 _bfd_elf_print_private_bfd_data (abfd, ptr);
6194
6195 if (elf_elfheader (abfd)->e_flags != 0)
6196 {
6197 FILE *file = ptr;
6198
6199 fprintf (file, _("private flags = 0x%lx:"),
6200 elf_elfheader (abfd)->e_flags);
6201
6202 if ((elf_elfheader (abfd)->e_flags & EF_PPC64_ABI) != 0)
6203 fprintf (file, _(" [abiv%ld]"),
6204 elf_elfheader (abfd)->e_flags & EF_PPC64_ABI);
6205 fputc ('\n', file);
6206 }
6207
6208 return TRUE;
6209 }
6210
6211 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
6212 of the code entry point, and its section, which must be in the same
6213 object as OPD_SEC. Returns (bfd_vma) -1 on error. */
6214
6215 static bfd_vma
6216 opd_entry_value (asection *opd_sec,
6217 bfd_vma offset,
6218 asection **code_sec,
6219 bfd_vma *code_off,
6220 bfd_boolean in_code_sec)
6221 {
6222 bfd *opd_bfd = opd_sec->owner;
6223 Elf_Internal_Rela *relocs;
6224 Elf_Internal_Rela *lo, *hi, *look;
6225 bfd_vma val;
6226
6227 /* No relocs implies we are linking a --just-symbols object, or looking
6228 at a final linked executable with addr2line or somesuch. */
6229 if (opd_sec->reloc_count == 0)
6230 {
6231 bfd_byte *contents = ppc64_elf_tdata (opd_bfd)->opd.contents;
6232
6233 if (contents == NULL)
6234 {
6235 if (!bfd_malloc_and_get_section (opd_bfd, opd_sec, &contents))
6236 return (bfd_vma) -1;
6237 ppc64_elf_tdata (opd_bfd)->opd.contents = contents;
6238 }
6239
6240 /* PR 17512: file: 64b9dfbb. */
6241 if (offset + 7 >= opd_sec->size || offset + 7 < offset)
6242 return (bfd_vma) -1;
6243
6244 val = bfd_get_64 (opd_bfd, contents + offset);
6245 if (code_sec != NULL)
6246 {
6247 asection *sec, *likely = NULL;
6248
6249 if (in_code_sec)
6250 {
6251 sec = *code_sec;
6252 if (sec->vma <= val
6253 && val < sec->vma + sec->size)
6254 likely = sec;
6255 else
6256 val = -1;
6257 }
6258 else
6259 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
6260 if (sec->vma <= val
6261 && (sec->flags & SEC_LOAD) != 0
6262 && (sec->flags & SEC_ALLOC) != 0)
6263 likely = sec;
6264 if (likely != NULL)
6265 {
6266 *code_sec = likely;
6267 if (code_off != NULL)
6268 *code_off = val - likely->vma;
6269 }
6270 }
6271 return val;
6272 }
6273
6274 BFD_ASSERT (is_ppc64_elf (opd_bfd));
6275
6276 relocs = ppc64_elf_tdata (opd_bfd)->opd.relocs;
6277 if (relocs == NULL)
6278 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
6279 /* PR 17512: file: df8e1fd6. */
6280 if (relocs == NULL)
6281 return (bfd_vma) -1;
6282
6283 /* Go find the opd reloc at the sym address. */
6284 lo = relocs;
6285 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
6286 val = (bfd_vma) -1;
6287 while (lo < hi)
6288 {
6289 look = lo + (hi - lo) / 2;
6290 if (look->r_offset < offset)
6291 lo = look + 1;
6292 else if (look->r_offset > offset)
6293 hi = look;
6294 else
6295 {
6296 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (opd_bfd);
6297
6298 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
6299 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
6300 {
6301 unsigned long symndx = ELF64_R_SYM (look->r_info);
6302 asection *sec = NULL;
6303
6304 if (symndx >= symtab_hdr->sh_info
6305 && elf_sym_hashes (opd_bfd) != NULL)
6306 {
6307 struct elf_link_hash_entry **sym_hashes;
6308 struct elf_link_hash_entry *rh;
6309
6310 sym_hashes = elf_sym_hashes (opd_bfd);
6311 rh = sym_hashes[symndx - symtab_hdr->sh_info];
6312 if (rh != NULL)
6313 {
6314 rh = elf_follow_link (rh);
6315 if (rh->root.type != bfd_link_hash_defined
6316 && rh->root.type != bfd_link_hash_defweak)
6317 break;
6318 if (rh->root.u.def.section->owner == opd_bfd)
6319 {
6320 val = rh->root.u.def.value;
6321 sec = rh->root.u.def.section;
6322 }
6323 }
6324 }
6325
6326 if (sec == NULL)
6327 {
6328 Elf_Internal_Sym *sym;
6329
6330 if (symndx < symtab_hdr->sh_info)
6331 {
6332 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
6333 if (sym == NULL)
6334 {
6335 size_t symcnt = symtab_hdr->sh_info;
6336 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
6337 symcnt, 0,
6338 NULL, NULL, NULL);
6339 if (sym == NULL)
6340 break;
6341 symtab_hdr->contents = (bfd_byte *) sym;
6342 }
6343 sym += symndx;
6344 }
6345 else
6346 {
6347 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
6348 1, symndx,
6349 NULL, NULL, NULL);
6350 if (sym == NULL)
6351 break;
6352 }
6353 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
6354 if (sec == NULL)
6355 break;
6356 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
6357 val = sym->st_value;
6358 }
6359
6360 val += look->r_addend;
6361 if (code_off != NULL)
6362 *code_off = val;
6363 if (code_sec != NULL)
6364 {
6365 if (in_code_sec && *code_sec != sec)
6366 return -1;
6367 else
6368 *code_sec = sec;
6369 }
6370 if (sec->output_section != NULL)
6371 val += sec->output_section->vma + sec->output_offset;
6372 }
6373 break;
6374 }
6375 }
6376
6377 return val;
6378 }
6379
6380 /* If the ELF symbol SYM might be a function in SEC, return the
6381 function size and set *CODE_OFF to the function's entry point,
6382 otherwise return zero. */
6383
6384 static bfd_size_type
6385 ppc64_elf_maybe_function_sym (const asymbol *sym, asection *sec,
6386 bfd_vma *code_off)
6387 {
6388 bfd_size_type size;
6389
6390 if ((sym->flags & (BSF_SECTION_SYM | BSF_FILE | BSF_OBJECT
6391 | BSF_THREAD_LOCAL | BSF_RELC | BSF_SRELC)) != 0)
6392 return 0;
6393
6394 size = 0;
6395 if (!(sym->flags & BSF_SYNTHETIC))
6396 size = ((elf_symbol_type *) sym)->internal_elf_sym.st_size;
6397
6398 if (strcmp (sym->section->name, ".opd") == 0)
6399 {
6400 struct _opd_sec_data *opd = get_opd_info (sym->section);
6401 bfd_vma symval = sym->value;
6402
6403 if (opd != NULL
6404 && opd->adjust != NULL
6405 && elf_section_data (sym->section)->relocs != NULL)
6406 {
6407 /* opd_entry_value will use cached relocs that have been
6408 adjusted, but with raw symbols. That means both local
6409 and global symbols need adjusting. */
6410 long adjust = opd->adjust[OPD_NDX (symval)];
6411 if (adjust == -1)
6412 return 0;
6413 symval += adjust;
6414 }
6415
6416 if (opd_entry_value (sym->section, symval,
6417 &sec, code_off, TRUE) == (bfd_vma) -1)
6418 return 0;
6419 /* An old ABI binary with dot-syms has a size of 24 on the .opd
6420 symbol. This size has nothing to do with the code size of the
6421 function, which is what we're supposed to return, but the
6422 code size isn't available without looking up the dot-sym.
6423 However, doing that would be a waste of time particularly
6424 since elf_find_function will look at the dot-sym anyway.
6425 Now, elf_find_function will keep the largest size of any
6426 function sym found at the code address of interest, so return
6427 1 here to avoid it incorrectly caching a larger function size
6428 for a small function. This does mean we return the wrong
6429 size for a new-ABI function of size 24, but all that does is
6430 disable caching for such functions. */
6431 if (size == 24)
6432 size = 1;
6433 }
6434 else
6435 {
6436 if (sym->section != sec)
6437 return 0;
6438 *code_off = sym->value;
6439 }
6440 if (size == 0)
6441 size = 1;
6442 return size;
6443 }
6444
6445 /* Return true if symbol is a strong function defined in an ELFv2
6446 object with st_other localentry bits of zero, ie. its local entry
6447 point coincides with its global entry point. */
6448
6449 static bfd_boolean
6450 is_elfv2_localentry0 (struct elf_link_hash_entry *h)
6451 {
6452 return (h != NULL
6453 && h->type == STT_FUNC
6454 && h->root.type == bfd_link_hash_defined
6455 && (STO_PPC64_LOCAL_MASK & h->other) == 0
6456 && !((struct ppc_link_hash_entry *) h)->non_zero_localentry
6457 && is_ppc64_elf (h->root.u.def.section->owner)
6458 && abiversion (h->root.u.def.section->owner) >= 2);
6459 }
6460
6461 /* Return true if symbol is defined in a regular object file. */
6462
6463 static bfd_boolean
6464 is_static_defined (struct elf_link_hash_entry *h)
6465 {
6466 return ((h->root.type == bfd_link_hash_defined
6467 || h->root.type == bfd_link_hash_defweak)
6468 && h->root.u.def.section != NULL
6469 && h->root.u.def.section->output_section != NULL);
6470 }
6471
6472 /* If FDH is a function descriptor symbol, return the associated code
6473 entry symbol if it is defined. Return NULL otherwise. */
6474
6475 static struct ppc_link_hash_entry *
6476 defined_code_entry (struct ppc_link_hash_entry *fdh)
6477 {
6478 if (fdh->is_func_descriptor)
6479 {
6480 struct ppc_link_hash_entry *fh = ppc_follow_link (fdh->oh);
6481 if (fh->elf.root.type == bfd_link_hash_defined
6482 || fh->elf.root.type == bfd_link_hash_defweak)
6483 return fh;
6484 }
6485 return NULL;
6486 }
6487
6488 /* If FH is a function code entry symbol, return the associated
6489 function descriptor symbol if it is defined. Return NULL otherwise. */
6490
6491 static struct ppc_link_hash_entry *
6492 defined_func_desc (struct ppc_link_hash_entry *fh)
6493 {
6494 if (fh->oh != NULL
6495 && fh->oh->is_func_descriptor)
6496 {
6497 struct ppc_link_hash_entry *fdh = ppc_follow_link (fh->oh);
6498 if (fdh->elf.root.type == bfd_link_hash_defined
6499 || fdh->elf.root.type == bfd_link_hash_defweak)
6500 return fdh;
6501 }
6502 return NULL;
6503 }
6504
6505 static bfd_boolean func_desc_adjust (struct elf_link_hash_entry *, void *);
6506
6507 /* Garbage collect sections, after first dealing with dot-symbols. */
6508
6509 static bfd_boolean
6510 ppc64_elf_gc_sections (bfd *abfd, struct bfd_link_info *info)
6511 {
6512 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6513
6514 if (htab != NULL && htab->need_func_desc_adj)
6515 {
6516 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
6517 htab->need_func_desc_adj = 0;
6518 }
6519 return bfd_elf_gc_sections (abfd, info);
6520 }
6521
6522 /* Mark all our entry sym sections, both opd and code section. */
6523
6524 static void
6525 ppc64_elf_gc_keep (struct bfd_link_info *info)
6526 {
6527 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6528 struct bfd_sym_chain *sym;
6529
6530 if (htab == NULL)
6531 return;
6532
6533 for (sym = info->gc_sym_list; sym != NULL; sym = sym->next)
6534 {
6535 struct ppc_link_hash_entry *eh, *fh;
6536 asection *sec;
6537
6538 eh = (struct ppc_link_hash_entry *)
6539 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, TRUE);
6540 if (eh == NULL)
6541 continue;
6542 if (eh->elf.root.type != bfd_link_hash_defined
6543 && eh->elf.root.type != bfd_link_hash_defweak)
6544 continue;
6545
6546 fh = defined_code_entry (eh);
6547 if (fh != NULL)
6548 {
6549 sec = fh->elf.root.u.def.section;
6550 sec->flags |= SEC_KEEP;
6551 }
6552 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6553 && opd_entry_value (eh->elf.root.u.def.section,
6554 eh->elf.root.u.def.value,
6555 &sec, NULL, FALSE) != (bfd_vma) -1)
6556 sec->flags |= SEC_KEEP;
6557
6558 sec = eh->elf.root.u.def.section;
6559 sec->flags |= SEC_KEEP;
6560 }
6561 }
6562
6563 /* Mark sections containing dynamically referenced symbols. When
6564 building shared libraries, we must assume that any visible symbol is
6565 referenced. */
6566
6567 static bfd_boolean
6568 ppc64_elf_gc_mark_dynamic_ref (struct elf_link_hash_entry *h, void *inf)
6569 {
6570 struct bfd_link_info *info = (struct bfd_link_info *) inf;
6571 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
6572 struct ppc_link_hash_entry *fdh;
6573 struct bfd_elf_dynamic_list *d = info->dynamic_list;
6574
6575 /* Dynamic linking info is on the func descriptor sym. */
6576 fdh = defined_func_desc (eh);
6577 if (fdh != NULL)
6578 eh = fdh;
6579
6580 if ((eh->elf.root.type == bfd_link_hash_defined
6581 || eh->elf.root.type == bfd_link_hash_defweak)
6582 && ((eh->elf.ref_dynamic && !eh->elf.forced_local)
6583 || ((eh->elf.def_regular || ELF_COMMON_DEF_P (&eh->elf))
6584 && ELF_ST_VISIBILITY (eh->elf.other) != STV_INTERNAL
6585 && ELF_ST_VISIBILITY (eh->elf.other) != STV_HIDDEN
6586 && (!bfd_link_executable (info)
6587 || info->gc_keep_exported
6588 || info->export_dynamic
6589 || (eh->elf.dynamic
6590 && d != NULL
6591 && (*d->match) (&d->head, NULL, eh->elf.root.root.string)))
6592 && (eh->elf.versioned >= versioned
6593 || !bfd_hide_sym_by_version (info->version_info,
6594 eh->elf.root.root.string)))))
6595 {
6596 asection *code_sec;
6597 struct ppc_link_hash_entry *fh;
6598
6599 eh->elf.root.u.def.section->flags |= SEC_KEEP;
6600
6601 /* Function descriptor syms cause the associated
6602 function code sym section to be marked. */
6603 fh = defined_code_entry (eh);
6604 if (fh != NULL)
6605 {
6606 code_sec = fh->elf.root.u.def.section;
6607 code_sec->flags |= SEC_KEEP;
6608 }
6609 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6610 && opd_entry_value (eh->elf.root.u.def.section,
6611 eh->elf.root.u.def.value,
6612 &code_sec, NULL, FALSE) != (bfd_vma) -1)
6613 code_sec->flags |= SEC_KEEP;
6614 }
6615
6616 return TRUE;
6617 }
6618
6619 /* Return the section that should be marked against GC for a given
6620 relocation. */
6621
6622 static asection *
6623 ppc64_elf_gc_mark_hook (asection *sec,
6624 struct bfd_link_info *info,
6625 Elf_Internal_Rela *rel,
6626 struct elf_link_hash_entry *h,
6627 Elf_Internal_Sym *sym)
6628 {
6629 asection *rsec;
6630
6631 /* Syms return NULL if we're marking .opd, so we avoid marking all
6632 function sections, as all functions are referenced in .opd. */
6633 rsec = NULL;
6634 if (get_opd_info (sec) != NULL)
6635 return rsec;
6636
6637 if (h != NULL)
6638 {
6639 enum elf_ppc64_reloc_type r_type;
6640 struct ppc_link_hash_entry *eh, *fh, *fdh;
6641
6642 r_type = ELF64_R_TYPE (rel->r_info);
6643 switch (r_type)
6644 {
6645 case R_PPC64_GNU_VTINHERIT:
6646 case R_PPC64_GNU_VTENTRY:
6647 break;
6648
6649 default:
6650 switch (h->root.type)
6651 {
6652 case bfd_link_hash_defined:
6653 case bfd_link_hash_defweak:
6654 eh = (struct ppc_link_hash_entry *) h;
6655 fdh = defined_func_desc (eh);
6656 if (fdh != NULL)
6657 {
6658 /* -mcall-aixdesc code references the dot-symbol on
6659 a call reloc. Mark the function descriptor too
6660 against garbage collection. */
6661 fdh->elf.mark = 1;
6662 if (fdh->elf.is_weakalias)
6663 weakdef (&fdh->elf)->mark = 1;
6664 eh = fdh;
6665 }
6666
6667 /* Function descriptor syms cause the associated
6668 function code sym section to be marked. */
6669 fh = defined_code_entry (eh);
6670 if (fh != NULL)
6671 {
6672 /* They also mark their opd section. */
6673 eh->elf.root.u.def.section->gc_mark = 1;
6674
6675 rsec = fh->elf.root.u.def.section;
6676 }
6677 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6678 && opd_entry_value (eh->elf.root.u.def.section,
6679 eh->elf.root.u.def.value,
6680 &rsec, NULL, FALSE) != (bfd_vma) -1)
6681 eh->elf.root.u.def.section->gc_mark = 1;
6682 else
6683 rsec = h->root.u.def.section;
6684 break;
6685
6686 case bfd_link_hash_common:
6687 rsec = h->root.u.c.p->section;
6688 break;
6689
6690 default:
6691 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
6692 }
6693 }
6694 }
6695 else
6696 {
6697 struct _opd_sec_data *opd;
6698
6699 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
6700 opd = get_opd_info (rsec);
6701 if (opd != NULL && opd->func_sec != NULL)
6702 {
6703 rsec->gc_mark = 1;
6704
6705 rsec = opd->func_sec[OPD_NDX (sym->st_value + rel->r_addend)];
6706 }
6707 }
6708
6709 return rsec;
6710 }
6711
6712 /* The maximum size of .sfpr. */
6713 #define SFPR_MAX (218*4)
6714
6715 struct sfpr_def_parms
6716 {
6717 const char name[12];
6718 unsigned char lo, hi;
6719 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
6720 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
6721 };
6722
6723 /* Auto-generate _save*, _rest* functions in .sfpr.
6724 If STUB_SEC is non-null, define alias symbols in STUB_SEC
6725 instead. */
6726
6727 static bfd_boolean
6728 sfpr_define (struct bfd_link_info *info,
6729 const struct sfpr_def_parms *parm,
6730 asection *stub_sec)
6731 {
6732 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6733 unsigned int i;
6734 size_t len = strlen (parm->name);
6735 bfd_boolean writing = FALSE;
6736 char sym[16];
6737
6738 if (htab == NULL)
6739 return FALSE;
6740
6741 memcpy (sym, parm->name, len);
6742 sym[len + 2] = 0;
6743
6744 for (i = parm->lo; i <= parm->hi; i++)
6745 {
6746 struct ppc_link_hash_entry *h;
6747
6748 sym[len + 0] = i / 10 + '0';
6749 sym[len + 1] = i % 10 + '0';
6750 h = (struct ppc_link_hash_entry *)
6751 elf_link_hash_lookup (&htab->elf, sym, writing, TRUE, TRUE);
6752 if (stub_sec != NULL)
6753 {
6754 if (h != NULL
6755 && h->elf.root.type == bfd_link_hash_defined
6756 && h->elf.root.u.def.section == htab->sfpr)
6757 {
6758 struct elf_link_hash_entry *s;
6759 char buf[32];
6760 sprintf (buf, "%08x.%s", stub_sec->id & 0xffffffff, sym);
6761 s = elf_link_hash_lookup (&htab->elf, buf, TRUE, TRUE, FALSE);
6762 if (s == NULL)
6763 return FALSE;
6764 if (s->root.type == bfd_link_hash_new
6765 || (s->root.type = bfd_link_hash_defined
6766 && s->root.u.def.section == stub_sec))
6767 {
6768 s->root.type = bfd_link_hash_defined;
6769 s->root.u.def.section = stub_sec;
6770 s->root.u.def.value = (stub_sec->size - htab->sfpr->size
6771 + h->elf.root.u.def.value);
6772 s->ref_regular = 1;
6773 s->def_regular = 1;
6774 s->ref_regular_nonweak = 1;
6775 s->forced_local = 1;
6776 s->non_elf = 0;
6777 s->root.linker_def = 1;
6778 }
6779 }
6780 continue;
6781 }
6782 if (h != NULL)
6783 {
6784 h->save_res = 1;
6785 if (!h->elf.def_regular)
6786 {
6787 h->elf.root.type = bfd_link_hash_defined;
6788 h->elf.root.u.def.section = htab->sfpr;
6789 h->elf.root.u.def.value = htab->sfpr->size;
6790 h->elf.type = STT_FUNC;
6791 h->elf.def_regular = 1;
6792 h->elf.non_elf = 0;
6793 _bfd_elf_link_hash_hide_symbol (info, &h->elf, TRUE);
6794 writing = TRUE;
6795 if (htab->sfpr->contents == NULL)
6796 {
6797 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
6798 if (htab->sfpr->contents == NULL)
6799 return FALSE;
6800 }
6801 }
6802 }
6803 if (writing)
6804 {
6805 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
6806 if (i != parm->hi)
6807 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
6808 else
6809 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
6810 htab->sfpr->size = p - htab->sfpr->contents;
6811 }
6812 }
6813
6814 return TRUE;
6815 }
6816
6817 static bfd_byte *
6818 savegpr0 (bfd *abfd, bfd_byte *p, int r)
6819 {
6820 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6821 return p + 4;
6822 }
6823
6824 static bfd_byte *
6825 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
6826 {
6827 p = savegpr0 (abfd, p, r);
6828 bfd_put_32 (abfd, STD_R0_0R1 + STK_LR, p);
6829 p = p + 4;
6830 bfd_put_32 (abfd, BLR, p);
6831 return p + 4;
6832 }
6833
6834 static bfd_byte *
6835 restgpr0 (bfd *abfd, bfd_byte *p, int r)
6836 {
6837 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6838 return p + 4;
6839 }
6840
6841 static bfd_byte *
6842 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
6843 {
6844 bfd_put_32 (abfd, LD_R0_0R1 + STK_LR, p);
6845 p = p + 4;
6846 p = restgpr0 (abfd, p, r);
6847 bfd_put_32 (abfd, MTLR_R0, p);
6848 p = p + 4;
6849 if (r == 29)
6850 {
6851 p = restgpr0 (abfd, p, 30);
6852 p = restgpr0 (abfd, p, 31);
6853 }
6854 bfd_put_32 (abfd, BLR, p);
6855 return p + 4;
6856 }
6857
6858 static bfd_byte *
6859 savegpr1 (bfd *abfd, bfd_byte *p, int r)
6860 {
6861 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6862 return p + 4;
6863 }
6864
6865 static bfd_byte *
6866 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
6867 {
6868 p = savegpr1 (abfd, p, r);
6869 bfd_put_32 (abfd, BLR, p);
6870 return p + 4;
6871 }
6872
6873 static bfd_byte *
6874 restgpr1 (bfd *abfd, bfd_byte *p, int r)
6875 {
6876 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6877 return p + 4;
6878 }
6879
6880 static bfd_byte *
6881 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
6882 {
6883 p = restgpr1 (abfd, p, r);
6884 bfd_put_32 (abfd, BLR, p);
6885 return p + 4;
6886 }
6887
6888 static bfd_byte *
6889 savefpr (bfd *abfd, bfd_byte *p, int r)
6890 {
6891 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6892 return p + 4;
6893 }
6894
6895 static bfd_byte *
6896 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
6897 {
6898 p = savefpr (abfd, p, r);
6899 bfd_put_32 (abfd, STD_R0_0R1 + STK_LR, p);
6900 p = p + 4;
6901 bfd_put_32 (abfd, BLR, p);
6902 return p + 4;
6903 }
6904
6905 static bfd_byte *
6906 restfpr (bfd *abfd, bfd_byte *p, int r)
6907 {
6908 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6909 return p + 4;
6910 }
6911
6912 static bfd_byte *
6913 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
6914 {
6915 bfd_put_32 (abfd, LD_R0_0R1 + STK_LR, p);
6916 p = p + 4;
6917 p = restfpr (abfd, p, r);
6918 bfd_put_32 (abfd, MTLR_R0, p);
6919 p = p + 4;
6920 if (r == 29)
6921 {
6922 p = restfpr (abfd, p, 30);
6923 p = restfpr (abfd, p, 31);
6924 }
6925 bfd_put_32 (abfd, BLR, p);
6926 return p + 4;
6927 }
6928
6929 static bfd_byte *
6930 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
6931 {
6932 p = savefpr (abfd, p, r);
6933 bfd_put_32 (abfd, BLR, p);
6934 return p + 4;
6935 }
6936
6937 static bfd_byte *
6938 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
6939 {
6940 p = restfpr (abfd, p, r);
6941 bfd_put_32 (abfd, BLR, p);
6942 return p + 4;
6943 }
6944
6945 static bfd_byte *
6946 savevr (bfd *abfd, bfd_byte *p, int r)
6947 {
6948 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6949 p = p + 4;
6950 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
6951 return p + 4;
6952 }
6953
6954 static bfd_byte *
6955 savevr_tail (bfd *abfd, bfd_byte *p, int r)
6956 {
6957 p = savevr (abfd, p, r);
6958 bfd_put_32 (abfd, BLR, p);
6959 return p + 4;
6960 }
6961
6962 static bfd_byte *
6963 restvr (bfd *abfd, bfd_byte *p, int r)
6964 {
6965 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6966 p = p + 4;
6967 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
6968 return p + 4;
6969 }
6970
6971 static bfd_byte *
6972 restvr_tail (bfd *abfd, bfd_byte *p, int r)
6973 {
6974 p = restvr (abfd, p, r);
6975 bfd_put_32 (abfd, BLR, p);
6976 return p + 4;
6977 }
6978
6979 /* Called via elf_link_hash_traverse to transfer dynamic linking
6980 information on function code symbol entries to their corresponding
6981 function descriptor symbol entries. */
6982
6983 static bfd_boolean
6984 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
6985 {
6986 struct bfd_link_info *info;
6987 struct ppc_link_hash_table *htab;
6988 struct ppc_link_hash_entry *fh;
6989 struct ppc_link_hash_entry *fdh;
6990 bfd_boolean force_local;
6991
6992 fh = (struct ppc_link_hash_entry *) h;
6993 if (fh->elf.root.type == bfd_link_hash_indirect)
6994 return TRUE;
6995
6996 if (!fh->is_func)
6997 return TRUE;
6998
6999 if (fh->elf.root.root.string[0] != '.'
7000 || fh->elf.root.root.string[1] == '\0')
7001 return TRUE;
7002
7003 info = inf;
7004 htab = ppc_hash_table (info);
7005 if (htab == NULL)
7006 return FALSE;
7007
7008 /* Find the corresponding function descriptor symbol. */
7009 fdh = lookup_fdh (fh, htab);
7010
7011 /* Resolve undefined references to dot-symbols as the value
7012 in the function descriptor, if we have one in a regular object.
7013 This is to satisfy cases like ".quad .foo". Calls to functions
7014 in dynamic objects are handled elsewhere. */
7015 if ((fh->elf.root.type == bfd_link_hash_undefined
7016 || fh->elf.root.type == bfd_link_hash_undefweak)
7017 && (fdh->elf.root.type == bfd_link_hash_defined
7018 || fdh->elf.root.type == bfd_link_hash_defweak)
7019 && get_opd_info (fdh->elf.root.u.def.section) != NULL
7020 && opd_entry_value (fdh->elf.root.u.def.section,
7021 fdh->elf.root.u.def.value,
7022 &fh->elf.root.u.def.section,
7023 &fh->elf.root.u.def.value, FALSE) != (bfd_vma) -1)
7024 {
7025 fh->elf.root.type = fdh->elf.root.type;
7026 fh->elf.forced_local = 1;
7027 fh->elf.def_regular = fdh->elf.def_regular;
7028 fh->elf.def_dynamic = fdh->elf.def_dynamic;
7029 }
7030
7031 if (!fh->elf.dynamic)
7032 {
7033 struct plt_entry *ent;
7034
7035 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
7036 if (ent->plt.refcount > 0)
7037 break;
7038 if (ent == NULL)
7039 return TRUE;
7040 }
7041
7042 /* Create a descriptor as undefined if necessary. */
7043 if (fdh == NULL
7044 && !bfd_link_executable (info)
7045 && (fh->elf.root.type == bfd_link_hash_undefined
7046 || fh->elf.root.type == bfd_link_hash_undefweak))
7047 {
7048 fdh = make_fdh (info, fh);
7049 if (fdh == NULL)
7050 return FALSE;
7051 }
7052
7053 /* We can't support overriding of symbols on a fake descriptor. */
7054 if (fdh != NULL
7055 && fdh->fake
7056 && (fh->elf.root.type == bfd_link_hash_defined
7057 || fh->elf.root.type == bfd_link_hash_defweak))
7058 _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE);
7059
7060 /* Transfer dynamic linking information to the function descriptor. */
7061 if (fdh != NULL)
7062 {
7063 fdh->elf.ref_regular |= fh->elf.ref_regular;
7064 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
7065 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
7066 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
7067 fdh->elf.dynamic |= fh->elf.dynamic;
7068 fdh->elf.needs_plt |= (fh->elf.needs_plt
7069 || fh->elf.type == STT_FUNC
7070 || fh->elf.type == STT_GNU_IFUNC);
7071 move_plt_plist (fh, fdh);
7072
7073 if (!fdh->elf.forced_local
7074 && fh->elf.dynindx != -1)
7075 if (!bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
7076 return FALSE;
7077 }
7078
7079 /* Now that the info is on the function descriptor, clear the
7080 function code sym info. Any function code syms for which we
7081 don't have a definition in a regular file, we force local.
7082 This prevents a shared library from exporting syms that have
7083 been imported from another library. Function code syms that
7084 are really in the library we must leave global to prevent the
7085 linker dragging in a definition from a static library. */
7086 force_local = (!fh->elf.def_regular
7087 || fdh == NULL
7088 || !fdh->elf.def_regular
7089 || fdh->elf.forced_local);
7090 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
7091
7092 return TRUE;
7093 }
7094
7095 static const struct sfpr_def_parms save_res_funcs[] =
7096 {
7097 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
7098 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
7099 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
7100 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
7101 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
7102 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
7103 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
7104 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
7105 { "._savef", 14, 31, savefpr, savefpr1_tail },
7106 { "._restf", 14, 31, restfpr, restfpr1_tail },
7107 { "_savevr_", 20, 31, savevr, savevr_tail },
7108 { "_restvr_", 20, 31, restvr, restvr_tail }
7109 };
7110
7111 /* Called near the start of bfd_elf_size_dynamic_sections. We use
7112 this hook to a) provide some gcc support functions, and b) transfer
7113 dynamic linking information gathered so far on function code symbol
7114 entries, to their corresponding function descriptor symbol entries. */
7115
7116 static bfd_boolean
7117 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
7118 struct bfd_link_info *info)
7119 {
7120 struct ppc_link_hash_table *htab;
7121
7122 htab = ppc_hash_table (info);
7123 if (htab == NULL)
7124 return FALSE;
7125
7126 /* Provide any missing _save* and _rest* functions. */
7127 if (htab->sfpr != NULL)
7128 {
7129 unsigned int i;
7130
7131 htab->sfpr->size = 0;
7132 for (i = 0; i < ARRAY_SIZE (save_res_funcs); i++)
7133 if (!sfpr_define (info, &save_res_funcs[i], NULL))
7134 return FALSE;
7135 if (htab->sfpr->size == 0)
7136 htab->sfpr->flags |= SEC_EXCLUDE;
7137 }
7138
7139 if (bfd_link_relocatable (info))
7140 return TRUE;
7141
7142 if (htab->elf.hgot != NULL)
7143 {
7144 _bfd_elf_link_hash_hide_symbol (info, htab->elf.hgot, TRUE);
7145 /* Make .TOC. defined so as to prevent it being made dynamic.
7146 The wrong value here is fixed later in ppc64_elf_set_toc. */
7147 if (!htab->elf.hgot->def_regular
7148 || htab->elf.hgot->root.type != bfd_link_hash_defined)
7149 {
7150 htab->elf.hgot->root.type = bfd_link_hash_defined;
7151 htab->elf.hgot->root.u.def.value = 0;
7152 htab->elf.hgot->root.u.def.section = bfd_abs_section_ptr;
7153 htab->elf.hgot->def_regular = 1;
7154 htab->elf.hgot->root.linker_def = 1;
7155 }
7156 htab->elf.hgot->type = STT_OBJECT;
7157 htab->elf.hgot->other = ((htab->elf.hgot->other & ~ELF_ST_VISIBILITY (-1))
7158 | STV_HIDDEN);
7159 }
7160
7161 if (htab->need_func_desc_adj)
7162 {
7163 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
7164 htab->need_func_desc_adj = 0;
7165 }
7166
7167 return TRUE;
7168 }
7169
7170 /* Find dynamic relocs for H that apply to read-only sections. */
7171
7172 static asection *
7173 readonly_dynrelocs (struct elf_link_hash_entry *h)
7174 {
7175 struct ppc_link_hash_entry *eh;
7176 struct elf_dyn_relocs *p;
7177
7178 eh = (struct ppc_link_hash_entry *) h;
7179 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7180 {
7181 asection *s = p->sec->output_section;
7182
7183 if (s != NULL && (s->flags & SEC_READONLY) != 0)
7184 return p->sec;
7185 }
7186 return NULL;
7187 }
7188
7189 /* Return true if we have dynamic relocs against H or any of its weak
7190 aliases, that apply to read-only sections. Cannot be used after
7191 size_dynamic_sections. */
7192
7193 static bfd_boolean
7194 alias_readonly_dynrelocs (struct elf_link_hash_entry *h)
7195 {
7196 struct ppc_link_hash_entry *eh;
7197
7198 eh = (struct ppc_link_hash_entry *) h;
7199 do
7200 {
7201 if (readonly_dynrelocs (&eh->elf))
7202 return TRUE;
7203 eh = (struct ppc_link_hash_entry *) eh->elf.u.alias;
7204 } while (eh != NULL && &eh->elf != h);
7205
7206 return FALSE;
7207 }
7208
7209 /* Return whether EH has pc-relative dynamic relocs. */
7210
7211 static bfd_boolean
7212 pc_dynrelocs (struct ppc_link_hash_entry *eh)
7213 {
7214 struct elf_dyn_relocs *p;
7215
7216 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7217 if (p->pc_count != 0)
7218 return TRUE;
7219 return FALSE;
7220 }
7221
7222 /* Return true if a global entry stub will be created for H. Valid
7223 for ELFv2 before plt entries have been allocated. */
7224
7225 static bfd_boolean
7226 global_entry_stub (struct elf_link_hash_entry *h)
7227 {
7228 struct plt_entry *pent;
7229
7230 if (!h->pointer_equality_needed
7231 || h->def_regular)
7232 return FALSE;
7233
7234 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
7235 if (pent->plt.refcount > 0
7236 && pent->addend == 0)
7237 return TRUE;
7238
7239 return FALSE;
7240 }
7241
7242 /* Adjust a symbol defined by a dynamic object and referenced by a
7243 regular object. The current definition is in some section of the
7244 dynamic object, but we're not including those sections. We have to
7245 change the definition to something the rest of the link can
7246 understand. */
7247
7248 static bfd_boolean
7249 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
7250 struct elf_link_hash_entry *h)
7251 {
7252 struct ppc_link_hash_table *htab;
7253 asection *s, *srel;
7254
7255 htab = ppc_hash_table (info);
7256 if (htab == NULL)
7257 return FALSE;
7258
7259 /* Deal with function syms. */
7260 if (h->type == STT_FUNC
7261 || h->type == STT_GNU_IFUNC
7262 || h->needs_plt)
7263 {
7264 bfd_boolean local = (((struct ppc_link_hash_entry *) h)->save_res
7265 || SYMBOL_CALLS_LOCAL (info, h)
7266 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h));
7267 /* Discard dyn_relocs when non-pic if we've decided that a
7268 function symbol is local and not an ifunc. We keep dynamic
7269 relocs for ifuncs when local rather than always emitting a
7270 plt call stub for them and defining the symbol on the call
7271 stub. We can't do that for ELFv1 anyway (a function symbol
7272 is defined on a descriptor, not code) and it can be faster at
7273 run-time due to not needing to bounce through a stub. The
7274 dyn_relocs for ifuncs will be applied even in a static
7275 executable. */
7276 if (!bfd_link_pic (info)
7277 && h->type != STT_GNU_IFUNC
7278 && local)
7279 ((struct ppc_link_hash_entry *) h)->dyn_relocs = NULL;
7280
7281 /* Clear procedure linkage table information for any symbol that
7282 won't need a .plt entry. */
7283 struct plt_entry *ent;
7284 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
7285 if (ent->plt.refcount > 0)
7286 break;
7287 if (ent == NULL
7288 || (h->type != STT_GNU_IFUNC
7289 && local
7290 && (htab->can_convert_all_inline_plt
7291 || (((struct ppc_link_hash_entry *) h)->tls_mask
7292 & (TLS_TLS | PLT_KEEP)) != PLT_KEEP)))
7293 {
7294 h->plt.plist = NULL;
7295 h->needs_plt = 0;
7296 h->pointer_equality_needed = 0;
7297 }
7298 else if (abiversion (info->output_bfd) >= 2)
7299 {
7300 /* Taking a function's address in a read/write section
7301 doesn't require us to define the function symbol in the
7302 executable on a global entry stub. A dynamic reloc can
7303 be used instead. The reason we prefer a few more dynamic
7304 relocs is that calling via a global entry stub costs a
7305 few more instructions, and pointer_equality_needed causes
7306 extra work in ld.so when resolving these symbols. */
7307 if (global_entry_stub (h))
7308 {
7309 if (!readonly_dynrelocs (h))
7310 {
7311 h->pointer_equality_needed = 0;
7312 /* If we haven't seen a branch reloc and the symbol
7313 isn't an ifunc then we don't need a plt entry. */
7314 if (!h->needs_plt)
7315 h->plt.plist = NULL;
7316 }
7317 else if (!bfd_link_pic (info))
7318 /* We are going to be defining the function symbol on the
7319 plt stub, so no dyn_relocs needed when non-pic. */
7320 ((struct ppc_link_hash_entry *) h)->dyn_relocs = NULL;
7321 }
7322
7323 /* ELFv2 function symbols can't have copy relocs. */
7324 return TRUE;
7325 }
7326 else if (!h->needs_plt
7327 && !readonly_dynrelocs (h))
7328 {
7329 /* If we haven't seen a branch reloc and the symbol isn't an
7330 ifunc then we don't need a plt entry. */
7331 h->plt.plist = NULL;
7332 h->pointer_equality_needed = 0;
7333 return TRUE;
7334 }
7335 }
7336 else
7337 h->plt.plist = NULL;
7338
7339 /* If this is a weak symbol, and there is a real definition, the
7340 processor independent code will have arranged for us to see the
7341 real definition first, and we can just use the same value. */
7342 if (h->is_weakalias)
7343 {
7344 struct elf_link_hash_entry *def = weakdef (h);
7345 BFD_ASSERT (def->root.type == bfd_link_hash_defined);
7346 h->root.u.def.section = def->root.u.def.section;
7347 h->root.u.def.value = def->root.u.def.value;
7348 if (def->root.u.def.section == htab->elf.sdynbss
7349 || def->root.u.def.section == htab->elf.sdynrelro)
7350 ((struct ppc_link_hash_entry *) h)->dyn_relocs = NULL;
7351 return TRUE;
7352 }
7353
7354 /* If we are creating a shared library, we must presume that the
7355 only references to the symbol are via the global offset table.
7356 For such cases we need not do anything here; the relocations will
7357 be handled correctly by relocate_section. */
7358 if (bfd_link_pic (info))
7359 return TRUE;
7360
7361 /* If there are no references to this symbol that do not use the
7362 GOT, we don't need to generate a copy reloc. */
7363 if (!h->non_got_ref)
7364 return TRUE;
7365
7366 /* Don't generate a copy reloc for symbols defined in the executable. */
7367 if (!h->def_dynamic || !h->ref_regular || h->def_regular
7368
7369 /* If -z nocopyreloc was given, don't generate them either. */
7370 || info->nocopyreloc
7371
7372 /* If we don't find any dynamic relocs in read-only sections, then
7373 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
7374 || (ELIMINATE_COPY_RELOCS && !alias_readonly_dynrelocs (h))
7375
7376 /* Protected variables do not work with .dynbss. The copy in
7377 .dynbss won't be used by the shared library with the protected
7378 definition for the variable. Text relocations are preferable
7379 to an incorrect program. */
7380 || h->protected_def)
7381 return TRUE;
7382
7383 if (h->plt.plist != NULL)
7384 {
7385 /* We should never get here, but unfortunately there are versions
7386 of gcc out there that improperly (for this ABI) put initialized
7387 function pointers, vtable refs and suchlike in read-only
7388 sections. Allow them to proceed, but warn that this might
7389 break at runtime. */
7390 info->callbacks->einfo
7391 (_("%P: copy reloc against `%pT' requires lazy plt linking; "
7392 "avoid setting LD_BIND_NOW=1 or upgrade gcc\n"),
7393 h->root.root.string);
7394 }
7395
7396 /* This is a reference to a symbol defined by a dynamic object which
7397 is not a function. */
7398
7399 /* We must allocate the symbol in our .dynbss section, which will
7400 become part of the .bss section of the executable. There will be
7401 an entry for this symbol in the .dynsym section. The dynamic
7402 object will contain position independent code, so all references
7403 from the dynamic object to this symbol will go through the global
7404 offset table. The dynamic linker will use the .dynsym entry to
7405 determine the address it must put in the global offset table, so
7406 both the dynamic object and the regular object will refer to the
7407 same memory location for the variable. */
7408 if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
7409 {
7410 s = htab->elf.sdynrelro;
7411 srel = htab->elf.sreldynrelro;
7412 }
7413 else
7414 {
7415 s = htab->elf.sdynbss;
7416 srel = htab->elf.srelbss;
7417 }
7418 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
7419 {
7420 /* We must generate a R_PPC64_COPY reloc to tell the dynamic
7421 linker to copy the initial value out of the dynamic object
7422 and into the runtime process image. */
7423 srel->size += sizeof (Elf64_External_Rela);
7424 h->needs_copy = 1;
7425 }
7426
7427 /* We no longer want dyn_relocs. */
7428 ((struct ppc_link_hash_entry *) h)->dyn_relocs = NULL;
7429 return _bfd_elf_adjust_dynamic_copy (info, h, s);
7430 }
7431
7432 /* If given a function descriptor symbol, hide both the function code
7433 sym and the descriptor. */
7434 static void
7435 ppc64_elf_hide_symbol (struct bfd_link_info *info,
7436 struct elf_link_hash_entry *h,
7437 bfd_boolean force_local)
7438 {
7439 struct ppc_link_hash_entry *eh;
7440 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
7441
7442 eh = (struct ppc_link_hash_entry *) h;
7443 if (eh->is_func_descriptor)
7444 {
7445 struct ppc_link_hash_entry *fh = eh->oh;
7446
7447 if (fh == NULL)
7448 {
7449 const char *p, *q;
7450 struct elf_link_hash_table *htab = elf_hash_table (info);
7451 char save;
7452
7453 /* We aren't supposed to use alloca in BFD because on
7454 systems which do not have alloca the version in libiberty
7455 calls xmalloc, which might cause the program to crash
7456 when it runs out of memory. This function doesn't have a
7457 return status, so there's no way to gracefully return an
7458 error. So cheat. We know that string[-1] can be safely
7459 accessed; It's either a string in an ELF string table,
7460 or allocated in an objalloc structure. */
7461
7462 p = eh->elf.root.root.string - 1;
7463 save = *p;
7464 *(char *) p = '.';
7465 fh = (struct ppc_link_hash_entry *)
7466 elf_link_hash_lookup (htab, p, FALSE, FALSE, FALSE);
7467 *(char *) p = save;
7468
7469 /* Unfortunately, if it so happens that the string we were
7470 looking for was allocated immediately before this string,
7471 then we overwrote the string terminator. That's the only
7472 reason the lookup should fail. */
7473 if (fh == NULL)
7474 {
7475 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
7476 while (q >= eh->elf.root.root.string && *q == *p)
7477 --q, --p;
7478 if (q < eh->elf.root.root.string && *p == '.')
7479 fh = (struct ppc_link_hash_entry *)
7480 elf_link_hash_lookup (htab, p, FALSE, FALSE, FALSE);
7481 }
7482 if (fh != NULL)
7483 {
7484 eh->oh = fh;
7485 fh->oh = eh;
7486 }
7487 }
7488 if (fh != NULL)
7489 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
7490 }
7491 }
7492
7493 static bfd_boolean
7494 get_sym_h (struct elf_link_hash_entry **hp,
7495 Elf_Internal_Sym **symp,
7496 asection **symsecp,
7497 unsigned char **tls_maskp,
7498 Elf_Internal_Sym **locsymsp,
7499 unsigned long r_symndx,
7500 bfd *ibfd)
7501 {
7502 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
7503
7504 if (r_symndx >= symtab_hdr->sh_info)
7505 {
7506 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
7507 struct elf_link_hash_entry *h;
7508
7509 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
7510 h = elf_follow_link (h);
7511
7512 if (hp != NULL)
7513 *hp = h;
7514
7515 if (symp != NULL)
7516 *symp = NULL;
7517
7518 if (symsecp != NULL)
7519 {
7520 asection *symsec = NULL;
7521 if (h->root.type == bfd_link_hash_defined
7522 || h->root.type == bfd_link_hash_defweak)
7523 symsec = h->root.u.def.section;
7524 *symsecp = symsec;
7525 }
7526
7527 if (tls_maskp != NULL)
7528 {
7529 struct ppc_link_hash_entry *eh;
7530
7531 eh = (struct ppc_link_hash_entry *) h;
7532 *tls_maskp = &eh->tls_mask;
7533 }
7534 }
7535 else
7536 {
7537 Elf_Internal_Sym *sym;
7538 Elf_Internal_Sym *locsyms = *locsymsp;
7539
7540 if (locsyms == NULL)
7541 {
7542 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
7543 if (locsyms == NULL)
7544 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
7545 symtab_hdr->sh_info,
7546 0, NULL, NULL, NULL);
7547 if (locsyms == NULL)
7548 return FALSE;
7549 *locsymsp = locsyms;
7550 }
7551 sym = locsyms + r_symndx;
7552
7553 if (hp != NULL)
7554 *hp = NULL;
7555
7556 if (symp != NULL)
7557 *symp = sym;
7558
7559 if (symsecp != NULL)
7560 *symsecp = bfd_section_from_elf_index (ibfd, sym->st_shndx);
7561
7562 if (tls_maskp != NULL)
7563 {
7564 struct got_entry **lgot_ents;
7565 unsigned char *tls_mask;
7566
7567 tls_mask = NULL;
7568 lgot_ents = elf_local_got_ents (ibfd);
7569 if (lgot_ents != NULL)
7570 {
7571 struct plt_entry **local_plt = (struct plt_entry **)
7572 (lgot_ents + symtab_hdr->sh_info);
7573 unsigned char *lgot_masks = (unsigned char *)
7574 (local_plt + symtab_hdr->sh_info);
7575 tls_mask = &lgot_masks[r_symndx];
7576 }
7577 *tls_maskp = tls_mask;
7578 }
7579 }
7580 return TRUE;
7581 }
7582
7583 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
7584 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
7585 type suitable for optimization, and 1 otherwise. */
7586
7587 static int
7588 get_tls_mask (unsigned char **tls_maskp,
7589 unsigned long *toc_symndx,
7590 bfd_vma *toc_addend,
7591 Elf_Internal_Sym **locsymsp,
7592 const Elf_Internal_Rela *rel,
7593 bfd *ibfd)
7594 {
7595 unsigned long r_symndx;
7596 int next_r;
7597 struct elf_link_hash_entry *h;
7598 Elf_Internal_Sym *sym;
7599 asection *sec;
7600 bfd_vma off;
7601
7602 r_symndx = ELF64_R_SYM (rel->r_info);
7603 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
7604 return 0;
7605
7606 if ((*tls_maskp != NULL
7607 && (**tls_maskp & TLS_TLS) != 0
7608 && **tls_maskp != (TLS_TLS | TLS_MARK))
7609 || sec == NULL
7610 || ppc64_elf_section_data (sec) == NULL
7611 || ppc64_elf_section_data (sec)->sec_type != sec_toc)
7612 return 1;
7613
7614 /* Look inside a TOC section too. */
7615 if (h != NULL)
7616 {
7617 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
7618 off = h->root.u.def.value;
7619 }
7620 else
7621 off = sym->st_value;
7622 off += rel->r_addend;
7623 BFD_ASSERT (off % 8 == 0);
7624 r_symndx = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8];
7625 next_r = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8 + 1];
7626 if (toc_symndx != NULL)
7627 *toc_symndx = r_symndx;
7628 if (toc_addend != NULL)
7629 *toc_addend = ppc64_elf_section_data (sec)->u.toc.add[off / 8];
7630 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
7631 return 0;
7632 if ((h == NULL || is_static_defined (h))
7633 && (next_r == -1 || next_r == -2))
7634 return 1 - next_r;
7635 return 1;
7636 }
7637
7638 /* Find (or create) an entry in the tocsave hash table. */
7639
7640 static struct tocsave_entry *
7641 tocsave_find (struct ppc_link_hash_table *htab,
7642 enum insert_option insert,
7643 Elf_Internal_Sym **local_syms,
7644 const Elf_Internal_Rela *irela,
7645 bfd *ibfd)
7646 {
7647 unsigned long r_indx;
7648 struct elf_link_hash_entry *h;
7649 Elf_Internal_Sym *sym;
7650 struct tocsave_entry ent, *p;
7651 hashval_t hash;
7652 struct tocsave_entry **slot;
7653
7654 r_indx = ELF64_R_SYM (irela->r_info);
7655 if (!get_sym_h (&h, &sym, &ent.sec, NULL, local_syms, r_indx, ibfd))
7656 return NULL;
7657 if (ent.sec == NULL || ent.sec->output_section == NULL)
7658 {
7659 _bfd_error_handler
7660 (_("%pB: undefined symbol on R_PPC64_TOCSAVE relocation"), ibfd);
7661 return NULL;
7662 }
7663
7664 if (h != NULL)
7665 ent.offset = h->root.u.def.value;
7666 else
7667 ent.offset = sym->st_value;
7668 ent.offset += irela->r_addend;
7669
7670 hash = tocsave_htab_hash (&ent);
7671 slot = ((struct tocsave_entry **)
7672 htab_find_slot_with_hash (htab->tocsave_htab, &ent, hash, insert));
7673 if (slot == NULL)
7674 return NULL;
7675
7676 if (*slot == NULL)
7677 {
7678 p = (struct tocsave_entry *) bfd_alloc (ibfd, sizeof (*p));
7679 if (p == NULL)
7680 return NULL;
7681 *p = ent;
7682 *slot = p;
7683 }
7684 return *slot;
7685 }
7686
7687 /* Adjust all global syms defined in opd sections. In gcc generated
7688 code for the old ABI, these will already have been done. */
7689
7690 static bfd_boolean
7691 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
7692 {
7693 struct ppc_link_hash_entry *eh;
7694 asection *sym_sec;
7695 struct _opd_sec_data *opd;
7696
7697 if (h->root.type == bfd_link_hash_indirect)
7698 return TRUE;
7699
7700 if (h->root.type != bfd_link_hash_defined
7701 && h->root.type != bfd_link_hash_defweak)
7702 return TRUE;
7703
7704 eh = (struct ppc_link_hash_entry *) h;
7705 if (eh->adjust_done)
7706 return TRUE;
7707
7708 sym_sec = eh->elf.root.u.def.section;
7709 opd = get_opd_info (sym_sec);
7710 if (opd != NULL && opd->adjust != NULL)
7711 {
7712 long adjust = opd->adjust[OPD_NDX (eh->elf.root.u.def.value)];
7713 if (adjust == -1)
7714 {
7715 /* This entry has been deleted. */
7716 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
7717 if (dsec == NULL)
7718 {
7719 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
7720 if (discarded_section (dsec))
7721 {
7722 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
7723 break;
7724 }
7725 }
7726 eh->elf.root.u.def.value = 0;
7727 eh->elf.root.u.def.section = dsec;
7728 }
7729 else
7730 eh->elf.root.u.def.value += adjust;
7731 eh->adjust_done = 1;
7732 }
7733 return TRUE;
7734 }
7735
7736 /* Handles decrementing dynamic reloc counts for the reloc specified by
7737 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM
7738 have already been determined. */
7739
7740 static bfd_boolean
7741 dec_dynrel_count (bfd_vma r_info,
7742 asection *sec,
7743 struct bfd_link_info *info,
7744 Elf_Internal_Sym **local_syms,
7745 struct elf_link_hash_entry *h,
7746 Elf_Internal_Sym *sym)
7747 {
7748 enum elf_ppc64_reloc_type r_type;
7749 asection *sym_sec = NULL;
7750
7751 /* Can this reloc be dynamic? This switch, and later tests here
7752 should be kept in sync with the code in check_relocs. */
7753 r_type = ELF64_R_TYPE (r_info);
7754 switch (r_type)
7755 {
7756 default:
7757 return TRUE;
7758
7759 case R_PPC64_TPREL16:
7760 case R_PPC64_TPREL16_LO:
7761 case R_PPC64_TPREL16_HI:
7762 case R_PPC64_TPREL16_HA:
7763 case R_PPC64_TPREL16_DS:
7764 case R_PPC64_TPREL16_LO_DS:
7765 case R_PPC64_TPREL16_HIGH:
7766 case R_PPC64_TPREL16_HIGHA:
7767 case R_PPC64_TPREL16_HIGHER:
7768 case R_PPC64_TPREL16_HIGHERA:
7769 case R_PPC64_TPREL16_HIGHEST:
7770 case R_PPC64_TPREL16_HIGHESTA:
7771 case R_PPC64_TPREL64:
7772 case R_PPC64_DTPMOD64:
7773 case R_PPC64_DTPREL64:
7774 case R_PPC64_ADDR64:
7775 case R_PPC64_REL30:
7776 case R_PPC64_REL32:
7777 case R_PPC64_REL64:
7778 case R_PPC64_ADDR14:
7779 case R_PPC64_ADDR14_BRNTAKEN:
7780 case R_PPC64_ADDR14_BRTAKEN:
7781 case R_PPC64_ADDR16:
7782 case R_PPC64_ADDR16_DS:
7783 case R_PPC64_ADDR16_HA:
7784 case R_PPC64_ADDR16_HI:
7785 case R_PPC64_ADDR16_HIGH:
7786 case R_PPC64_ADDR16_HIGHA:
7787 case R_PPC64_ADDR16_HIGHER:
7788 case R_PPC64_ADDR16_HIGHERA:
7789 case R_PPC64_ADDR16_HIGHEST:
7790 case R_PPC64_ADDR16_HIGHESTA:
7791 case R_PPC64_ADDR16_LO:
7792 case R_PPC64_ADDR16_LO_DS:
7793 case R_PPC64_ADDR24:
7794 case R_PPC64_ADDR32:
7795 case R_PPC64_UADDR16:
7796 case R_PPC64_UADDR32:
7797 case R_PPC64_UADDR64:
7798 case R_PPC64_TOC:
7799 break;
7800 }
7801
7802 if (local_syms != NULL)
7803 {
7804 unsigned long r_symndx;
7805 bfd *ibfd = sec->owner;
7806
7807 r_symndx = ELF64_R_SYM (r_info);
7808 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
7809 return FALSE;
7810 }
7811
7812 if ((bfd_link_pic (info)
7813 && (must_be_dyn_reloc (info, r_type)
7814 || (h != NULL
7815 && (!SYMBOLIC_BIND (info, h)
7816 || h->root.type == bfd_link_hash_defweak
7817 || !h->def_regular))))
7818 || (ELIMINATE_COPY_RELOCS
7819 && !bfd_link_pic (info)
7820 && h != NULL
7821 && (h->root.type == bfd_link_hash_defweak
7822 || !h->def_regular)))
7823 ;
7824 else
7825 return TRUE;
7826
7827 if (h != NULL)
7828 {
7829 struct elf_dyn_relocs *p;
7830 struct elf_dyn_relocs **pp;
7831 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
7832
7833 /* elf_gc_sweep may have already removed all dyn relocs associated
7834 with local syms for a given section. Also, symbol flags are
7835 changed by elf_gc_sweep_symbol, confusing the test above. Don't
7836 report a dynreloc miscount. */
7837 if (*pp == NULL && info->gc_sections)
7838 return TRUE;
7839
7840 while ((p = *pp) != NULL)
7841 {
7842 if (p->sec == sec)
7843 {
7844 if (!must_be_dyn_reloc (info, r_type))
7845 p->pc_count -= 1;
7846 p->count -= 1;
7847 if (p->count == 0)
7848 *pp = p->next;
7849 return TRUE;
7850 }
7851 pp = &p->next;
7852 }
7853 }
7854 else
7855 {
7856 struct ppc_dyn_relocs *p;
7857 struct ppc_dyn_relocs **pp;
7858 void *vpp;
7859 bfd_boolean is_ifunc;
7860
7861 if (local_syms == NULL)
7862 sym_sec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
7863 if (sym_sec == NULL)
7864 sym_sec = sec;
7865
7866 vpp = &elf_section_data (sym_sec)->local_dynrel;
7867 pp = (struct ppc_dyn_relocs **) vpp;
7868
7869 if (*pp == NULL && info->gc_sections)
7870 return TRUE;
7871
7872 is_ifunc = ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC;
7873 while ((p = *pp) != NULL)
7874 {
7875 if (p->sec == sec && p->ifunc == is_ifunc)
7876 {
7877 p->count -= 1;
7878 if (p->count == 0)
7879 *pp = p->next;
7880 return TRUE;
7881 }
7882 pp = &p->next;
7883 }
7884 }
7885
7886 /* xgettext:c-format */
7887 _bfd_error_handler (_("dynreloc miscount for %pB, section %pA"),
7888 sec->owner, sec);
7889 bfd_set_error (bfd_error_bad_value);
7890 return FALSE;
7891 }
7892
7893 /* Remove unused Official Procedure Descriptor entries. Currently we
7894 only remove those associated with functions in discarded link-once
7895 sections, or weakly defined functions that have been overridden. It
7896 would be possible to remove many more entries for statically linked
7897 applications. */
7898
7899 bfd_boolean
7900 ppc64_elf_edit_opd (struct bfd_link_info *info)
7901 {
7902 bfd *ibfd;
7903 bfd_boolean some_edited = FALSE;
7904 asection *need_pad = NULL;
7905 struct ppc_link_hash_table *htab;
7906
7907 htab = ppc_hash_table (info);
7908 if (htab == NULL)
7909 return FALSE;
7910
7911 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
7912 {
7913 asection *sec;
7914 Elf_Internal_Rela *relstart, *rel, *relend;
7915 Elf_Internal_Shdr *symtab_hdr;
7916 Elf_Internal_Sym *local_syms;
7917 struct _opd_sec_data *opd;
7918 bfd_boolean need_edit, add_aux_fields, broken;
7919 bfd_size_type cnt_16b = 0;
7920
7921 if (!is_ppc64_elf (ibfd))
7922 continue;
7923
7924 sec = bfd_get_section_by_name (ibfd, ".opd");
7925 if (sec == NULL || sec->size == 0)
7926 continue;
7927
7928 if (sec->sec_info_type == SEC_INFO_TYPE_JUST_SYMS)
7929 continue;
7930
7931 if (sec->output_section == bfd_abs_section_ptr)
7932 continue;
7933
7934 /* Look through the section relocs. */
7935 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
7936 continue;
7937
7938 local_syms = NULL;
7939 symtab_hdr = &elf_symtab_hdr (ibfd);
7940
7941 /* Read the relocations. */
7942 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7943 info->keep_memory);
7944 if (relstart == NULL)
7945 return FALSE;
7946
7947 /* First run through the relocs to check they are sane, and to
7948 determine whether we need to edit this opd section. */
7949 need_edit = FALSE;
7950 broken = FALSE;
7951 need_pad = sec;
7952 relend = relstart + sec->reloc_count;
7953 for (rel = relstart; rel < relend; )
7954 {
7955 enum elf_ppc64_reloc_type r_type;
7956 unsigned long r_symndx;
7957 asection *sym_sec;
7958 struct elf_link_hash_entry *h;
7959 Elf_Internal_Sym *sym;
7960 bfd_vma offset;
7961
7962 /* .opd contains an array of 16 or 24 byte entries. We're
7963 only interested in the reloc pointing to a function entry
7964 point. */
7965 offset = rel->r_offset;
7966 if (rel + 1 == relend
7967 || rel[1].r_offset != offset + 8)
7968 {
7969 /* If someone messes with .opd alignment then after a
7970 "ld -r" we might have padding in the middle of .opd.
7971 Also, there's nothing to prevent someone putting
7972 something silly in .opd with the assembler. No .opd
7973 optimization for them! */
7974 broken_opd:
7975 _bfd_error_handler
7976 (_("%pB: .opd is not a regular array of opd entries"), ibfd);
7977 broken = TRUE;
7978 break;
7979 }
7980
7981 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
7982 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
7983 {
7984 _bfd_error_handler
7985 /* xgettext:c-format */
7986 (_("%pB: unexpected reloc type %u in .opd section"),
7987 ibfd, r_type);
7988 broken = TRUE;
7989 break;
7990 }
7991
7992 r_symndx = ELF64_R_SYM (rel->r_info);
7993 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7994 r_symndx, ibfd))
7995 goto error_ret;
7996
7997 if (sym_sec == NULL || sym_sec->owner == NULL)
7998 {
7999 const char *sym_name;
8000 if (h != NULL)
8001 sym_name = h->root.root.string;
8002 else
8003 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
8004 sym_sec);
8005
8006 _bfd_error_handler
8007 /* xgettext:c-format */
8008 (_("%pB: undefined sym `%s' in .opd section"),
8009 ibfd, sym_name);
8010 broken = TRUE;
8011 break;
8012 }
8013
8014 /* opd entries are always for functions defined in the
8015 current input bfd. If the symbol isn't defined in the
8016 input bfd, then we won't be using the function in this
8017 bfd; It must be defined in a linkonce section in another
8018 bfd, or is weak. It's also possible that we are
8019 discarding the function due to a linker script /DISCARD/,
8020 which we test for via the output_section. */
8021 if (sym_sec->owner != ibfd
8022 || sym_sec->output_section == bfd_abs_section_ptr)
8023 need_edit = TRUE;
8024
8025 rel += 2;
8026 if (rel + 1 == relend
8027 || (rel + 2 < relend
8028 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC))
8029 ++rel;
8030
8031 if (rel == relend)
8032 {
8033 if (sec->size == offset + 24)
8034 {
8035 need_pad = NULL;
8036 break;
8037 }
8038 if (sec->size == offset + 16)
8039 {
8040 cnt_16b++;
8041 break;
8042 }
8043 goto broken_opd;
8044 }
8045 else if (rel + 1 < relend
8046 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
8047 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
8048 {
8049 if (rel[0].r_offset == offset + 16)
8050 cnt_16b++;
8051 else if (rel[0].r_offset != offset + 24)
8052 goto broken_opd;
8053 }
8054 else
8055 goto broken_opd;
8056 }
8057
8058 add_aux_fields = htab->params->non_overlapping_opd && cnt_16b > 0;
8059
8060 if (!broken && (need_edit || add_aux_fields))
8061 {
8062 Elf_Internal_Rela *write_rel;
8063 Elf_Internal_Shdr *rel_hdr;
8064 bfd_byte *rptr, *wptr;
8065 bfd_byte *new_contents;
8066 bfd_size_type amt;
8067
8068 new_contents = NULL;
8069 amt = OPD_NDX (sec->size) * sizeof (long);
8070 opd = &ppc64_elf_section_data (sec)->u.opd;
8071 opd->adjust = bfd_zalloc (sec->owner, amt);
8072 if (opd->adjust == NULL)
8073 return FALSE;
8074
8075 /* This seems a waste of time as input .opd sections are all
8076 zeros as generated by gcc, but I suppose there's no reason
8077 this will always be so. We might start putting something in
8078 the third word of .opd entries. */
8079 if ((sec->flags & SEC_IN_MEMORY) == 0)
8080 {
8081 bfd_byte *loc;
8082 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
8083 {
8084 if (loc != NULL)
8085 free (loc);
8086 error_ret:
8087 if (local_syms != NULL
8088 && symtab_hdr->contents != (unsigned char *) local_syms)
8089 free (local_syms);
8090 if (elf_section_data (sec)->relocs != relstart)
8091 free (relstart);
8092 return FALSE;
8093 }
8094 sec->contents = loc;
8095 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
8096 }
8097
8098 elf_section_data (sec)->relocs = relstart;
8099
8100 new_contents = sec->contents;
8101 if (add_aux_fields)
8102 {
8103 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
8104 if (new_contents == NULL)
8105 return FALSE;
8106 need_pad = NULL;
8107 }
8108 wptr = new_contents;
8109 rptr = sec->contents;
8110 write_rel = relstart;
8111 for (rel = relstart; rel < relend; )
8112 {
8113 unsigned long r_symndx;
8114 asection *sym_sec;
8115 struct elf_link_hash_entry *h;
8116 struct ppc_link_hash_entry *fdh = NULL;
8117 Elf_Internal_Sym *sym;
8118 long opd_ent_size;
8119 Elf_Internal_Rela *next_rel;
8120 bfd_boolean skip;
8121
8122 r_symndx = ELF64_R_SYM (rel->r_info);
8123 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8124 r_symndx, ibfd))
8125 goto error_ret;
8126
8127 next_rel = rel + 2;
8128 if (next_rel + 1 == relend
8129 || (next_rel + 2 < relend
8130 && ELF64_R_TYPE (next_rel[2].r_info) == R_PPC64_TOC))
8131 ++next_rel;
8132
8133 /* See if the .opd entry is full 24 byte or
8134 16 byte (with fd_aux entry overlapped with next
8135 fd_func). */
8136 opd_ent_size = 24;
8137 if (next_rel == relend)
8138 {
8139 if (sec->size == rel->r_offset + 16)
8140 opd_ent_size = 16;
8141 }
8142 else if (next_rel->r_offset == rel->r_offset + 16)
8143 opd_ent_size = 16;
8144
8145 if (h != NULL
8146 && h->root.root.string[0] == '.')
8147 {
8148 fdh = ((struct ppc_link_hash_entry *) h)->oh;
8149 if (fdh != NULL)
8150 {
8151 fdh = ppc_follow_link (fdh);
8152 if (fdh->elf.root.type != bfd_link_hash_defined
8153 && fdh->elf.root.type != bfd_link_hash_defweak)
8154 fdh = NULL;
8155 }
8156 }
8157
8158 skip = (sym_sec->owner != ibfd
8159 || sym_sec->output_section == bfd_abs_section_ptr);
8160 if (skip)
8161 {
8162 if (fdh != NULL && sym_sec->owner == ibfd)
8163 {
8164 /* Arrange for the function descriptor sym
8165 to be dropped. */
8166 fdh->elf.root.u.def.value = 0;
8167 fdh->elf.root.u.def.section = sym_sec;
8168 }
8169 opd->adjust[OPD_NDX (rel->r_offset)] = -1;
8170
8171 if (NO_OPD_RELOCS || bfd_link_relocatable (info))
8172 rel = next_rel;
8173 else
8174 while (1)
8175 {
8176 if (!dec_dynrel_count (rel->r_info, sec, info,
8177 NULL, h, sym))
8178 goto error_ret;
8179
8180 if (++rel == next_rel)
8181 break;
8182
8183 r_symndx = ELF64_R_SYM (rel->r_info);
8184 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8185 r_symndx, ibfd))
8186 goto error_ret;
8187 }
8188 }
8189 else
8190 {
8191 /* We'll be keeping this opd entry. */
8192 long adjust;
8193
8194 if (fdh != NULL)
8195 {
8196 /* Redefine the function descriptor symbol to
8197 this location in the opd section. It is
8198 necessary to update the value here rather
8199 than using an array of adjustments as we do
8200 for local symbols, because various places
8201 in the generic ELF code use the value
8202 stored in u.def.value. */
8203 fdh->elf.root.u.def.value = wptr - new_contents;
8204 fdh->adjust_done = 1;
8205 }
8206
8207 /* Local syms are a bit tricky. We could
8208 tweak them as they can be cached, but
8209 we'd need to look through the local syms
8210 for the function descriptor sym which we
8211 don't have at the moment. So keep an
8212 array of adjustments. */
8213 adjust = (wptr - new_contents) - (rptr - sec->contents);
8214 opd->adjust[OPD_NDX (rel->r_offset)] = adjust;
8215
8216 if (wptr != rptr)
8217 memcpy (wptr, rptr, opd_ent_size);
8218 wptr += opd_ent_size;
8219 if (add_aux_fields && opd_ent_size == 16)
8220 {
8221 memset (wptr, '\0', 8);
8222 wptr += 8;
8223 }
8224
8225 /* We need to adjust any reloc offsets to point to the
8226 new opd entries. */
8227 for ( ; rel != next_rel; ++rel)
8228 {
8229 rel->r_offset += adjust;
8230 if (write_rel != rel)
8231 memcpy (write_rel, rel, sizeof (*rel));
8232 ++write_rel;
8233 }
8234 }
8235
8236 rptr += opd_ent_size;
8237 }
8238
8239 sec->size = wptr - new_contents;
8240 sec->reloc_count = write_rel - relstart;
8241 if (add_aux_fields)
8242 {
8243 free (sec->contents);
8244 sec->contents = new_contents;
8245 }
8246
8247 /* Fudge the header size too, as this is used later in
8248 elf_bfd_final_link if we are emitting relocs. */
8249 rel_hdr = _bfd_elf_single_rel_hdr (sec);
8250 rel_hdr->sh_size = sec->reloc_count * rel_hdr->sh_entsize;
8251 some_edited = TRUE;
8252 }
8253 else if (elf_section_data (sec)->relocs != relstart)
8254 free (relstart);
8255
8256 if (local_syms != NULL
8257 && symtab_hdr->contents != (unsigned char *) local_syms)
8258 {
8259 if (!info->keep_memory)
8260 free (local_syms);
8261 else
8262 symtab_hdr->contents = (unsigned char *) local_syms;
8263 }
8264 }
8265
8266 if (some_edited)
8267 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
8268
8269 /* If we are doing a final link and the last .opd entry is just 16 byte
8270 long, add a 8 byte padding after it. */
8271 if (need_pad != NULL && !bfd_link_relocatable (info))
8272 {
8273 bfd_byte *p;
8274
8275 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
8276 {
8277 BFD_ASSERT (need_pad->size > 0);
8278
8279 p = bfd_malloc (need_pad->size + 8);
8280 if (p == NULL)
8281 return FALSE;
8282
8283 if (! bfd_get_section_contents (need_pad->owner, need_pad,
8284 p, 0, need_pad->size))
8285 return FALSE;
8286
8287 need_pad->contents = p;
8288 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
8289 }
8290 else
8291 {
8292 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
8293 if (p == NULL)
8294 return FALSE;
8295
8296 need_pad->contents = p;
8297 }
8298
8299 memset (need_pad->contents + need_pad->size, 0, 8);
8300 need_pad->size += 8;
8301 }
8302
8303 return TRUE;
8304 }
8305
8306 /* Analyze inline PLT call relocations to see whether calls to locally
8307 defined functions can be converted to direct calls. */
8308
8309 bfd_boolean
8310 ppc64_elf_inline_plt (struct bfd_link_info *info)
8311 {
8312 struct ppc_link_hash_table *htab;
8313 bfd *ibfd;
8314 asection *sec;
8315 bfd_vma low_vma, high_vma, limit;
8316
8317 htab = ppc_hash_table (info);
8318 if (htab == NULL)
8319 return FALSE;
8320
8321 /* A bl insn can reach -0x2000000 to 0x1fffffc. The limit is
8322 reduced somewhat to cater for possible stubs that might be added
8323 between the call and its destination. */
8324 if (htab->params->group_size < 0)
8325 {
8326 limit = -htab->params->group_size;
8327 if (limit == 1)
8328 limit = 0x1e00000;
8329 }
8330 else
8331 {
8332 limit = htab->params->group_size;
8333 if (limit == 1)
8334 limit = 0x1c00000;
8335 }
8336
8337 low_vma = -1;
8338 high_vma = 0;
8339 for (sec = info->output_bfd->sections; sec != NULL; sec = sec->next)
8340 if ((sec->flags & (SEC_ALLOC | SEC_CODE)) == (SEC_ALLOC | SEC_CODE))
8341 {
8342 if (low_vma > sec->vma)
8343 low_vma = sec->vma;
8344 if (high_vma < sec->vma + sec->size)
8345 high_vma = sec->vma + sec->size;
8346 }
8347
8348 /* If a "bl" can reach anywhere in local code sections, then we can
8349 convert all inline PLT sequences to direct calls when the symbol
8350 is local. */
8351 if (high_vma - low_vma < limit)
8352 {
8353 htab->can_convert_all_inline_plt = 1;
8354 return TRUE;
8355 }
8356
8357 /* Otherwise, go looking through relocs for cases where a direct
8358 call won't reach. Mark the symbol on any such reloc to disable
8359 the optimization and keep the PLT entry as it seems likely that
8360 this will be better than creating trampolines. Note that this
8361 will disable the optimization for all inline PLT calls to a
8362 particular symbol, not just those that won't reach. The
8363 difficulty in doing a more precise optimization is that the
8364 linker needs to make a decision depending on whether a
8365 particular R_PPC64_PLTCALL insn can be turned into a direct
8366 call, for each of the R_PPC64_PLTSEQ and R_PPC64_PLT16* insns in
8367 the sequence, and there is nothing that ties those relocs
8368 together except their symbol. */
8369
8370 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
8371 {
8372 Elf_Internal_Shdr *symtab_hdr;
8373 Elf_Internal_Sym *local_syms;
8374
8375 if (!is_ppc64_elf (ibfd))
8376 continue;
8377
8378 local_syms = NULL;
8379 symtab_hdr = &elf_symtab_hdr (ibfd);
8380
8381 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8382 if (ppc64_elf_section_data (sec)->has_pltcall
8383 && !bfd_is_abs_section (sec->output_section))
8384 {
8385 Elf_Internal_Rela *relstart, *rel, *relend;
8386
8387 /* Read the relocations. */
8388 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8389 info->keep_memory);
8390 if (relstart == NULL)
8391 return FALSE;
8392
8393 relend = relstart + sec->reloc_count;
8394 for (rel = relstart; rel < relend; )
8395 {
8396 enum elf_ppc64_reloc_type r_type;
8397 unsigned long r_symndx;
8398 asection *sym_sec;
8399 struct elf_link_hash_entry *h;
8400 Elf_Internal_Sym *sym;
8401 unsigned char *tls_maskp;
8402
8403 r_type = ELF64_R_TYPE (rel->r_info);
8404 if (r_type != R_PPC64_PLTCALL)
8405 continue;
8406
8407 r_symndx = ELF64_R_SYM (rel->r_info);
8408 if (!get_sym_h (&h, &sym, &sym_sec, &tls_maskp, &local_syms,
8409 r_symndx, ibfd))
8410 {
8411 if (elf_section_data (sec)->relocs != relstart)
8412 free (relstart);
8413 if (local_syms != NULL
8414 && symtab_hdr->contents != (unsigned char *) local_syms)
8415 free (local_syms);
8416 return FALSE;
8417 }
8418
8419 if (sym_sec != NULL && sym_sec->output_section != NULL)
8420 {
8421 bfd_vma from, to;
8422 if (h != NULL)
8423 to = h->root.u.def.value;
8424 else
8425 to = sym->st_value;
8426 to += (rel->r_addend
8427 + sym_sec->output_offset
8428 + sym_sec->output_section->vma);
8429 from = (rel->r_offset
8430 + sec->output_offset
8431 + sec->output_section->vma);
8432 if (to - from + limit < 2 * limit)
8433 *tls_maskp &= ~PLT_KEEP;
8434 }
8435 }
8436 if (elf_section_data (sec)->relocs != relstart)
8437 free (relstart);
8438 }
8439
8440 if (local_syms != NULL
8441 && symtab_hdr->contents != (unsigned char *) local_syms)
8442 {
8443 if (!info->keep_memory)
8444 free (local_syms);
8445 else
8446 symtab_hdr->contents = (unsigned char *) local_syms;
8447 }
8448 }
8449
8450 return TRUE;
8451 }
8452
8453 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
8454
8455 asection *
8456 ppc64_elf_tls_setup (struct bfd_link_info *info)
8457 {
8458 struct ppc_link_hash_table *htab;
8459
8460 htab = ppc_hash_table (info);
8461 if (htab == NULL)
8462 return NULL;
8463
8464 if (abiversion (info->output_bfd) == 1)
8465 htab->opd_abi = 1;
8466
8467 if (htab->params->no_multi_toc)
8468 htab->do_multi_toc = 0;
8469 else if (!htab->do_multi_toc)
8470 htab->params->no_multi_toc = 1;
8471
8472 /* Default to --no-plt-localentry, as this option can cause problems
8473 with symbol interposition. For example, glibc libpthread.so and
8474 libc.so duplicate many pthread symbols, with a fallback
8475 implementation in libc.so. In some cases the fallback does more
8476 work than the pthread implementation. __pthread_condattr_destroy
8477 is one such symbol: the libpthread.so implementation is
8478 localentry:0 while the libc.so implementation is localentry:8.
8479 An app that "cleverly" uses dlopen to only load necessary
8480 libraries at runtime may omit loading libpthread.so when not
8481 running multi-threaded, which then results in the libc.so
8482 fallback symbols being used and ld.so complaining. Now there
8483 are workarounds in ld (see non_zero_localentry) to detect the
8484 pthread situation, but that may not be the only case where
8485 --plt-localentry can cause trouble. */
8486 if (htab->params->plt_localentry0 < 0)
8487 htab->params->plt_localentry0 = 0;
8488 if (htab->params->plt_localentry0
8489 && elf_link_hash_lookup (&htab->elf, "GLIBC_2.26",
8490 FALSE, FALSE, FALSE) == NULL)
8491 _bfd_error_handler
8492 (_("warning: --plt-localentry is especially dangerous without "
8493 "ld.so support to detect ABI violations"));
8494
8495 htab->tls_get_addr = ((struct ppc_link_hash_entry *)
8496 elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
8497 FALSE, FALSE, TRUE));
8498 /* Move dynamic linking info to the function descriptor sym. */
8499 if (htab->tls_get_addr != NULL)
8500 func_desc_adjust (&htab->tls_get_addr->elf, info);
8501 htab->tls_get_addr_fd = ((struct ppc_link_hash_entry *)
8502 elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
8503 FALSE, FALSE, TRUE));
8504 if (htab->params->tls_get_addr_opt)
8505 {
8506 struct elf_link_hash_entry *opt, *opt_fd, *tga, *tga_fd;
8507
8508 opt = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr_opt",
8509 FALSE, FALSE, TRUE);
8510 if (opt != NULL)
8511 func_desc_adjust (opt, info);
8512 opt_fd = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
8513 FALSE, FALSE, TRUE);
8514 if (opt_fd != NULL
8515 && (opt_fd->root.type == bfd_link_hash_defined
8516 || opt_fd->root.type == bfd_link_hash_defweak))
8517 {
8518 /* If glibc supports an optimized __tls_get_addr call stub,
8519 signalled by the presence of __tls_get_addr_opt, and we'll
8520 be calling __tls_get_addr via a plt call stub, then
8521 make __tls_get_addr point to __tls_get_addr_opt. */
8522 tga_fd = &htab->tls_get_addr_fd->elf;
8523 if (htab->elf.dynamic_sections_created
8524 && tga_fd != NULL
8525 && (tga_fd->type == STT_FUNC
8526 || tga_fd->needs_plt)
8527 && !(SYMBOL_CALLS_LOCAL (info, tga_fd)
8528 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, tga_fd)))
8529 {
8530 struct plt_entry *ent;
8531
8532 for (ent = tga_fd->plt.plist; ent != NULL; ent = ent->next)
8533 if (ent->plt.refcount > 0)
8534 break;
8535 if (ent != NULL)
8536 {
8537 tga_fd->root.type = bfd_link_hash_indirect;
8538 tga_fd->root.u.i.link = &opt_fd->root;
8539 ppc64_elf_copy_indirect_symbol (info, opt_fd, tga_fd);
8540 opt_fd->mark = 1;
8541 if (opt_fd->dynindx != -1)
8542 {
8543 /* Use __tls_get_addr_opt in dynamic relocations. */
8544 opt_fd->dynindx = -1;
8545 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
8546 opt_fd->dynstr_index);
8547 if (!bfd_elf_link_record_dynamic_symbol (info, opt_fd))
8548 return NULL;
8549 }
8550 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) opt_fd;
8551 tga = &htab->tls_get_addr->elf;
8552 if (opt != NULL && tga != NULL)
8553 {
8554 tga->root.type = bfd_link_hash_indirect;
8555 tga->root.u.i.link = &opt->root;
8556 ppc64_elf_copy_indirect_symbol (info, opt, tga);
8557 opt->mark = 1;
8558 _bfd_elf_link_hash_hide_symbol (info, opt,
8559 tga->forced_local);
8560 htab->tls_get_addr = (struct ppc_link_hash_entry *) opt;
8561 }
8562 htab->tls_get_addr_fd->oh = htab->tls_get_addr;
8563 htab->tls_get_addr_fd->is_func_descriptor = 1;
8564 if (htab->tls_get_addr != NULL)
8565 {
8566 htab->tls_get_addr->oh = htab->tls_get_addr_fd;
8567 htab->tls_get_addr->is_func = 1;
8568 }
8569 }
8570 }
8571 }
8572 else if (htab->params->tls_get_addr_opt < 0)
8573 htab->params->tls_get_addr_opt = 0;
8574 }
8575 return _bfd_elf_tls_setup (info->output_bfd, info);
8576 }
8577
8578 /* Return TRUE iff REL is a branch reloc with a global symbol matching
8579 HASH1 or HASH2. */
8580
8581 static bfd_boolean
8582 branch_reloc_hash_match (const bfd *ibfd,
8583 const Elf_Internal_Rela *rel,
8584 const struct ppc_link_hash_entry *hash1,
8585 const struct ppc_link_hash_entry *hash2)
8586 {
8587 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
8588 enum elf_ppc64_reloc_type r_type = ELF64_R_TYPE (rel->r_info);
8589 unsigned int r_symndx = ELF64_R_SYM (rel->r_info);
8590
8591 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
8592 {
8593 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
8594 struct elf_link_hash_entry *h;
8595
8596 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
8597 h = elf_follow_link (h);
8598 if (h == &hash1->elf || h == &hash2->elf)
8599 return TRUE;
8600 }
8601 return FALSE;
8602 }
8603
8604 /* Run through all the TLS relocs looking for optimization
8605 opportunities. The linker has been hacked (see ppc64elf.em) to do
8606 a preliminary section layout so that we know the TLS segment
8607 offsets. We can't optimize earlier because some optimizations need
8608 to know the tp offset, and we need to optimize before allocating
8609 dynamic relocations. */
8610
8611 bfd_boolean
8612 ppc64_elf_tls_optimize (struct bfd_link_info *info)
8613 {
8614 bfd *ibfd;
8615 asection *sec;
8616 struct ppc_link_hash_table *htab;
8617 unsigned char *toc_ref;
8618 int pass;
8619
8620 if (!bfd_link_executable (info))
8621 return TRUE;
8622
8623 htab = ppc_hash_table (info);
8624 if (htab == NULL)
8625 return FALSE;
8626
8627 /* Make two passes over the relocs. On the first pass, mark toc
8628 entries involved with tls relocs, and check that tls relocs
8629 involved in setting up a tls_get_addr call are indeed followed by
8630 such a call. If they are not, we can't do any tls optimization.
8631 On the second pass twiddle tls_mask flags to notify
8632 relocate_section that optimization can be done, and adjust got
8633 and plt refcounts. */
8634 toc_ref = NULL;
8635 for (pass = 0; pass < 2; ++pass)
8636 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
8637 {
8638 Elf_Internal_Sym *locsyms = NULL;
8639 asection *toc = bfd_get_section_by_name (ibfd, ".toc");
8640
8641 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8642 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
8643 {
8644 Elf_Internal_Rela *relstart, *rel, *relend;
8645 bfd_boolean found_tls_get_addr_arg = 0;
8646
8647 /* Read the relocations. */
8648 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8649 info->keep_memory);
8650 if (relstart == NULL)
8651 {
8652 free (toc_ref);
8653 return FALSE;
8654 }
8655
8656 relend = relstart + sec->reloc_count;
8657 for (rel = relstart; rel < relend; rel++)
8658 {
8659 enum elf_ppc64_reloc_type r_type;
8660 unsigned long r_symndx;
8661 struct elf_link_hash_entry *h;
8662 Elf_Internal_Sym *sym;
8663 asection *sym_sec;
8664 unsigned char *tls_mask;
8665 unsigned char tls_set, tls_clear, tls_type = 0;
8666 bfd_vma value;
8667 bfd_boolean ok_tprel, is_local;
8668 long toc_ref_index = 0;
8669 int expecting_tls_get_addr = 0;
8670 bfd_boolean ret = FALSE;
8671
8672 r_symndx = ELF64_R_SYM (rel->r_info);
8673 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
8674 r_symndx, ibfd))
8675 {
8676 err_free_rel:
8677 if (elf_section_data (sec)->relocs != relstart)
8678 free (relstart);
8679 if (toc_ref != NULL)
8680 free (toc_ref);
8681 if (locsyms != NULL
8682 && (elf_symtab_hdr (ibfd).contents
8683 != (unsigned char *) locsyms))
8684 free (locsyms);
8685 return ret;
8686 }
8687
8688 if (h != NULL)
8689 {
8690 if (h->root.type == bfd_link_hash_defined
8691 || h->root.type == bfd_link_hash_defweak)
8692 value = h->root.u.def.value;
8693 else if (h->root.type == bfd_link_hash_undefweak)
8694 value = 0;
8695 else
8696 {
8697 found_tls_get_addr_arg = 0;
8698 continue;
8699 }
8700 }
8701 else
8702 /* Symbols referenced by TLS relocs must be of type
8703 STT_TLS. So no need for .opd local sym adjust. */
8704 value = sym->st_value;
8705
8706 ok_tprel = FALSE;
8707 is_local = FALSE;
8708 if (h == NULL
8709 || !h->def_dynamic)
8710 {
8711 is_local = TRUE;
8712 if (h != NULL
8713 && h->root.type == bfd_link_hash_undefweak)
8714 ok_tprel = TRUE;
8715 else if (sym_sec != NULL
8716 && sym_sec->output_section != NULL)
8717 {
8718 value += sym_sec->output_offset;
8719 value += sym_sec->output_section->vma;
8720 value -= htab->elf.tls_sec->vma;
8721 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
8722 < (bfd_vma) 1 << 32);
8723 }
8724 }
8725
8726 r_type = ELF64_R_TYPE (rel->r_info);
8727 /* If this section has old-style __tls_get_addr calls
8728 without marker relocs, then check that each
8729 __tls_get_addr call reloc is preceded by a reloc
8730 that conceivably belongs to the __tls_get_addr arg
8731 setup insn. If we don't find matching arg setup
8732 relocs, don't do any tls optimization. */
8733 if (pass == 0
8734 && sec->has_tls_get_addr_call
8735 && h != NULL
8736 && (h == &htab->tls_get_addr->elf
8737 || h == &htab->tls_get_addr_fd->elf)
8738 && !found_tls_get_addr_arg
8739 && is_branch_reloc (r_type))
8740 {
8741 info->callbacks->minfo (_("%H __tls_get_addr lost arg, "
8742 "TLS optimization disabled\n"),
8743 ibfd, sec, rel->r_offset);
8744 ret = TRUE;
8745 goto err_free_rel;
8746 }
8747
8748 found_tls_get_addr_arg = 0;
8749 switch (r_type)
8750 {
8751 case R_PPC64_GOT_TLSLD16:
8752 case R_PPC64_GOT_TLSLD16_LO:
8753 expecting_tls_get_addr = 1;
8754 found_tls_get_addr_arg = 1;
8755 /* Fall through. */
8756
8757 case R_PPC64_GOT_TLSLD16_HI:
8758 case R_PPC64_GOT_TLSLD16_HA:
8759 /* These relocs should never be against a symbol
8760 defined in a shared lib. Leave them alone if
8761 that turns out to be the case. */
8762 if (!is_local)
8763 continue;
8764
8765 /* LD -> LE */
8766 tls_set = 0;
8767 tls_clear = TLS_LD;
8768 tls_type = TLS_TLS | TLS_LD;
8769 break;
8770
8771 case R_PPC64_GOT_TLSGD16:
8772 case R_PPC64_GOT_TLSGD16_LO:
8773 expecting_tls_get_addr = 1;
8774 found_tls_get_addr_arg = 1;
8775 /* Fall through. */
8776
8777 case R_PPC64_GOT_TLSGD16_HI:
8778 case R_PPC64_GOT_TLSGD16_HA:
8779 if (ok_tprel)
8780 /* GD -> LE */
8781 tls_set = 0;
8782 else
8783 /* GD -> IE */
8784 tls_set = TLS_TLS | TLS_TPRELGD;
8785 tls_clear = TLS_GD;
8786 tls_type = TLS_TLS | TLS_GD;
8787 break;
8788
8789 case R_PPC64_GOT_TPREL16_DS:
8790 case R_PPC64_GOT_TPREL16_LO_DS:
8791 case R_PPC64_GOT_TPREL16_HI:
8792 case R_PPC64_GOT_TPREL16_HA:
8793 if (ok_tprel)
8794 {
8795 /* IE -> LE */
8796 tls_set = 0;
8797 tls_clear = TLS_TPREL;
8798 tls_type = TLS_TLS | TLS_TPREL;
8799 break;
8800 }
8801 continue;
8802
8803 case R_PPC64_TLSGD:
8804 case R_PPC64_TLSLD:
8805 if (rel + 1 < relend
8806 && is_plt_seq_reloc (ELF64_R_TYPE (rel[1].r_info)))
8807 {
8808 if (pass != 0
8809 && ELF64_R_TYPE (rel[1].r_info) != R_PPC64_PLTSEQ)
8810 {
8811 r_symndx = ELF64_R_SYM (rel[1].r_info);
8812 if (!get_sym_h (&h, NULL, NULL, NULL, &locsyms,
8813 r_symndx, ibfd))
8814 goto err_free_rel;
8815 if (h != NULL)
8816 {
8817 struct plt_entry *ent = NULL;
8818
8819 for (ent = h->plt.plist;
8820 ent != NULL;
8821 ent = ent->next)
8822 if (ent->addend == rel[1].r_addend)
8823 break;
8824
8825 if (ent != NULL
8826 && ent->plt.refcount > 0)
8827 ent->plt.refcount -= 1;
8828 }
8829 }
8830 continue;
8831 }
8832 found_tls_get_addr_arg = 1;
8833 /* Fall through. */
8834
8835 case R_PPC64_TLS:
8836 case R_PPC64_TOC16:
8837 case R_PPC64_TOC16_LO:
8838 if (sym_sec == NULL || sym_sec != toc)
8839 continue;
8840
8841 /* Mark this toc entry as referenced by a TLS
8842 code sequence. We can do that now in the
8843 case of R_PPC64_TLS, and after checking for
8844 tls_get_addr for the TOC16 relocs. */
8845 if (toc_ref == NULL)
8846 toc_ref = bfd_zmalloc (toc->output_section->rawsize / 8);
8847 if (toc_ref == NULL)
8848 goto err_free_rel;
8849
8850 if (h != NULL)
8851 value = h->root.u.def.value;
8852 else
8853 value = sym->st_value;
8854 value += rel->r_addend;
8855 if (value % 8 != 0)
8856 continue;
8857 BFD_ASSERT (value < toc->size
8858 && toc->output_offset % 8 == 0);
8859 toc_ref_index = (value + toc->output_offset) / 8;
8860 if (r_type == R_PPC64_TLS
8861 || r_type == R_PPC64_TLSGD
8862 || r_type == R_PPC64_TLSLD)
8863 {
8864 toc_ref[toc_ref_index] = 1;
8865 continue;
8866 }
8867
8868 if (pass != 0 && toc_ref[toc_ref_index] == 0)
8869 continue;
8870
8871 tls_set = 0;
8872 tls_clear = 0;
8873 expecting_tls_get_addr = 2;
8874 break;
8875
8876 case R_PPC64_TPREL64:
8877 if (pass == 0
8878 || sec != toc
8879 || toc_ref == NULL
8880 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
8881 continue;
8882 if (ok_tprel)
8883 {
8884 /* IE -> LE */
8885 tls_set = TLS_EXPLICIT;
8886 tls_clear = TLS_TPREL;
8887 break;
8888 }
8889 continue;
8890
8891 case R_PPC64_DTPMOD64:
8892 if (pass == 0
8893 || sec != toc
8894 || toc_ref == NULL
8895 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
8896 continue;
8897 if (rel + 1 < relend
8898 && (rel[1].r_info
8899 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
8900 && rel[1].r_offset == rel->r_offset + 8)
8901 {
8902 if (ok_tprel)
8903 /* GD -> LE */
8904 tls_set = TLS_EXPLICIT | TLS_GD;
8905 else
8906 /* GD -> IE */
8907 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
8908 tls_clear = TLS_GD;
8909 }
8910 else
8911 {
8912 if (!is_local)
8913 continue;
8914
8915 /* LD -> LE */
8916 tls_set = TLS_EXPLICIT;
8917 tls_clear = TLS_LD;
8918 }
8919 break;
8920
8921 default:
8922 continue;
8923 }
8924
8925 if (pass == 0)
8926 {
8927 if (!expecting_tls_get_addr
8928 || !sec->has_tls_get_addr_call)
8929 continue;
8930
8931 if (rel + 1 < relend
8932 && branch_reloc_hash_match (ibfd, rel + 1,
8933 htab->tls_get_addr,
8934 htab->tls_get_addr_fd))
8935 {
8936 if (expecting_tls_get_addr == 2)
8937 {
8938 /* Check for toc tls entries. */
8939 unsigned char *toc_tls;
8940 int retval;
8941
8942 retval = get_tls_mask (&toc_tls, NULL, NULL,
8943 &locsyms,
8944 rel, ibfd);
8945 if (retval == 0)
8946 goto err_free_rel;
8947 if (toc_tls != NULL)
8948 {
8949 if ((*toc_tls & TLS_TLS) != 0
8950 && ((*toc_tls & (TLS_GD | TLS_LD)) != 0))
8951 found_tls_get_addr_arg = 1;
8952 if (retval > 1)
8953 toc_ref[toc_ref_index] = 1;
8954 }
8955 }
8956 continue;
8957 }
8958
8959 /* Uh oh, we didn't find the expected call. We
8960 could just mark this symbol to exclude it
8961 from tls optimization but it's safer to skip
8962 the entire optimization. */
8963 /* xgettext:c-format */
8964 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
8965 "TLS optimization disabled\n"),
8966 ibfd, sec, rel->r_offset);
8967 ret = TRUE;
8968 goto err_free_rel;
8969 }
8970
8971 /* If we don't have old-style __tls_get_addr calls
8972 without TLSGD/TLSLD marker relocs, and we haven't
8973 found a new-style __tls_get_addr call with a
8974 marker for this symbol, then we either have a
8975 broken object file or an -mlongcall style
8976 indirect call to __tls_get_addr without a marker.
8977 Disable optimization in this case. */
8978 if ((tls_clear & (TLS_GD | TLS_LD)) != 0
8979 && (tls_set & TLS_EXPLICIT) == 0
8980 && !sec->has_tls_get_addr_call
8981 && ((*tls_mask & (TLS_TLS | TLS_MARK))
8982 != (TLS_TLS | TLS_MARK)))
8983 continue;
8984
8985 if (expecting_tls_get_addr)
8986 {
8987 struct plt_entry *ent = NULL;
8988
8989 if (htab->tls_get_addr != NULL)
8990 for (ent = htab->tls_get_addr->elf.plt.plist;
8991 ent != NULL;
8992 ent = ent->next)
8993 if (ent->addend == 0)
8994 break;
8995
8996 if (ent == NULL && htab->tls_get_addr_fd != NULL)
8997 for (ent = htab->tls_get_addr_fd->elf.plt.plist;
8998 ent != NULL;
8999 ent = ent->next)
9000 if (ent->addend == 0)
9001 break;
9002
9003 if (ent != NULL
9004 && ent->plt.refcount > 0)
9005 ent->plt.refcount -= 1;
9006 }
9007
9008 if (tls_clear == 0)
9009 continue;
9010
9011 if ((tls_set & TLS_EXPLICIT) == 0)
9012 {
9013 struct got_entry *ent;
9014
9015 /* Adjust got entry for this reloc. */
9016 if (h != NULL)
9017 ent = h->got.glist;
9018 else
9019 ent = elf_local_got_ents (ibfd)[r_symndx];
9020
9021 for (; ent != NULL; ent = ent->next)
9022 if (ent->addend == rel->r_addend
9023 && ent->owner == ibfd
9024 && ent->tls_type == tls_type)
9025 break;
9026 if (ent == NULL)
9027 abort ();
9028
9029 if (tls_set == 0)
9030 {
9031 /* We managed to get rid of a got entry. */
9032 if (ent->got.refcount > 0)
9033 ent->got.refcount -= 1;
9034 }
9035 }
9036 else
9037 {
9038 /* If we got rid of a DTPMOD/DTPREL reloc pair then
9039 we'll lose one or two dyn relocs. */
9040 if (!dec_dynrel_count (rel->r_info, sec, info,
9041 NULL, h, sym))
9042 return FALSE;
9043
9044 if (tls_set == (TLS_EXPLICIT | TLS_GD))
9045 {
9046 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
9047 NULL, h, sym))
9048 return FALSE;
9049 }
9050 }
9051
9052 *tls_mask |= tls_set;
9053 *tls_mask &= ~tls_clear;
9054 }
9055
9056 if (elf_section_data (sec)->relocs != relstart)
9057 free (relstart);
9058 }
9059
9060 if (locsyms != NULL
9061 && (elf_symtab_hdr (ibfd).contents != (unsigned char *) locsyms))
9062 {
9063 if (!info->keep_memory)
9064 free (locsyms);
9065 else
9066 elf_symtab_hdr (ibfd).contents = (unsigned char *) locsyms;
9067 }
9068 }
9069
9070 if (toc_ref != NULL)
9071 free (toc_ref);
9072 htab->do_tls_opt = 1;
9073 return TRUE;
9074 }
9075
9076 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
9077 the values of any global symbols in a toc section that has been
9078 edited. Globals in toc sections should be a rarity, so this function
9079 sets a flag if any are found in toc sections other than the one just
9080 edited, so that further hash table traversals can be avoided. */
9081
9082 struct adjust_toc_info
9083 {
9084 asection *toc;
9085 unsigned long *skip;
9086 bfd_boolean global_toc_syms;
9087 };
9088
9089 enum toc_skip_enum { ref_from_discarded = 1, can_optimize = 2 };
9090
9091 static bfd_boolean
9092 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
9093 {
9094 struct ppc_link_hash_entry *eh;
9095 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
9096 unsigned long i;
9097
9098 if (h->root.type != bfd_link_hash_defined
9099 && h->root.type != bfd_link_hash_defweak)
9100 return TRUE;
9101
9102 eh = (struct ppc_link_hash_entry *) h;
9103 if (eh->adjust_done)
9104 return TRUE;
9105
9106 if (eh->elf.root.u.def.section == toc_inf->toc)
9107 {
9108 if (eh->elf.root.u.def.value > toc_inf->toc->rawsize)
9109 i = toc_inf->toc->rawsize >> 3;
9110 else
9111 i = eh->elf.root.u.def.value >> 3;
9112
9113 if ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0)
9114 {
9115 _bfd_error_handler
9116 (_("%s defined on removed toc entry"), eh->elf.root.root.string);
9117 do
9118 ++i;
9119 while ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0);
9120 eh->elf.root.u.def.value = (bfd_vma) i << 3;
9121 }
9122
9123 eh->elf.root.u.def.value -= toc_inf->skip[i];
9124 eh->adjust_done = 1;
9125 }
9126 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
9127 toc_inf->global_toc_syms = TRUE;
9128
9129 return TRUE;
9130 }
9131
9132 /* Return TRUE iff INSN with a relocation of R_TYPE is one we expect
9133 on a _LO variety toc/got reloc. */
9134
9135 static bfd_boolean
9136 ok_lo_toc_insn (unsigned int insn, enum elf_ppc64_reloc_type r_type)
9137 {
9138 return ((insn & (0x3f << 26)) == 12u << 26 /* addic */
9139 || (insn & (0x3f << 26)) == 14u << 26 /* addi */
9140 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
9141 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
9142 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
9143 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
9144 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
9145 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
9146 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
9147 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
9148 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
9149 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
9150 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
9151 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
9152 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
9153 || (insn & (0x3f << 26)) == 56u << 26 /* lq,lfq */
9154 || ((insn & (0x3f << 26)) == 57u << 26 /* lxsd,lxssp,lfdp */
9155 /* Exclude lfqu by testing reloc. If relocs are ever
9156 defined for the reduced D field in psq_lu then those
9157 will need testing too. */
9158 && r_type != R_PPC64_TOC16_LO && r_type != R_PPC64_GOT16_LO)
9159 || ((insn & (0x3f << 26)) == 58u << 26 /* ld,lwa */
9160 && (insn & 1) == 0)
9161 || (insn & (0x3f << 26)) == 60u << 26 /* stfq */
9162 || ((insn & (0x3f << 26)) == 61u << 26 /* lxv,stx{v,sd,ssp},stfdp */
9163 /* Exclude stfqu. psq_stu as above for psq_lu. */
9164 && r_type != R_PPC64_TOC16_LO && r_type != R_PPC64_GOT16_LO)
9165 || ((insn & (0x3f << 26)) == 62u << 26 /* std,stq */
9166 && (insn & 1) == 0));
9167 }
9168
9169 /* Examine all relocs referencing .toc sections in order to remove
9170 unused .toc entries. */
9171
9172 bfd_boolean
9173 ppc64_elf_edit_toc (struct bfd_link_info *info)
9174 {
9175 bfd *ibfd;
9176 struct adjust_toc_info toc_inf;
9177 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9178
9179 htab->do_toc_opt = 1;
9180 toc_inf.global_toc_syms = TRUE;
9181 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
9182 {
9183 asection *toc, *sec;
9184 Elf_Internal_Shdr *symtab_hdr;
9185 Elf_Internal_Sym *local_syms;
9186 Elf_Internal_Rela *relstart, *rel, *toc_relocs;
9187 unsigned long *skip, *drop;
9188 unsigned char *used;
9189 unsigned char *keep, last, some_unused;
9190
9191 if (!is_ppc64_elf (ibfd))
9192 continue;
9193
9194 toc = bfd_get_section_by_name (ibfd, ".toc");
9195 if (toc == NULL
9196 || toc->size == 0
9197 || toc->sec_info_type == SEC_INFO_TYPE_JUST_SYMS
9198 || discarded_section (toc))
9199 continue;
9200
9201 toc_relocs = NULL;
9202 local_syms = NULL;
9203 symtab_hdr = &elf_symtab_hdr (ibfd);
9204
9205 /* Look at sections dropped from the final link. */
9206 skip = NULL;
9207 relstart = NULL;
9208 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
9209 {
9210 if (sec->reloc_count == 0
9211 || !discarded_section (sec)
9212 || get_opd_info (sec)
9213 || (sec->flags & SEC_ALLOC) == 0
9214 || (sec->flags & SEC_DEBUGGING) != 0)
9215 continue;
9216
9217 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
9218 if (relstart == NULL)
9219 goto error_ret;
9220
9221 /* Run through the relocs to see which toc entries might be
9222 unused. */
9223 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
9224 {
9225 enum elf_ppc64_reloc_type r_type;
9226 unsigned long r_symndx;
9227 asection *sym_sec;
9228 struct elf_link_hash_entry *h;
9229 Elf_Internal_Sym *sym;
9230 bfd_vma val;
9231
9232 r_type = ELF64_R_TYPE (rel->r_info);
9233 switch (r_type)
9234 {
9235 default:
9236 continue;
9237
9238 case R_PPC64_TOC16:
9239 case R_PPC64_TOC16_LO:
9240 case R_PPC64_TOC16_HI:
9241 case R_PPC64_TOC16_HA:
9242 case R_PPC64_TOC16_DS:
9243 case R_PPC64_TOC16_LO_DS:
9244 break;
9245 }
9246
9247 r_symndx = ELF64_R_SYM (rel->r_info);
9248 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9249 r_symndx, ibfd))
9250 goto error_ret;
9251
9252 if (sym_sec != toc)
9253 continue;
9254
9255 if (h != NULL)
9256 val = h->root.u.def.value;
9257 else
9258 val = sym->st_value;
9259 val += rel->r_addend;
9260
9261 if (val >= toc->size)
9262 continue;
9263
9264 /* Anything in the toc ought to be aligned to 8 bytes.
9265 If not, don't mark as unused. */
9266 if (val & 7)
9267 continue;
9268
9269 if (skip == NULL)
9270 {
9271 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
9272 if (skip == NULL)
9273 goto error_ret;
9274 }
9275
9276 skip[val >> 3] = ref_from_discarded;
9277 }
9278
9279 if (elf_section_data (sec)->relocs != relstart)
9280 free (relstart);
9281 }
9282
9283 /* For largetoc loads of address constants, we can convert
9284 . addis rx,2,addr@got@ha
9285 . ld ry,addr@got@l(rx)
9286 to
9287 . addis rx,2,addr@toc@ha
9288 . addi ry,rx,addr@toc@l
9289 when addr is within 2G of the toc pointer. This then means
9290 that the word storing "addr" in the toc is no longer needed. */
9291
9292 if (!ppc64_elf_tdata (ibfd)->has_small_toc_reloc
9293 && toc->output_section->rawsize < (bfd_vma) 1 << 31
9294 && toc->reloc_count != 0)
9295 {
9296 /* Read toc relocs. */
9297 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
9298 info->keep_memory);
9299 if (toc_relocs == NULL)
9300 goto error_ret;
9301
9302 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
9303 {
9304 enum elf_ppc64_reloc_type r_type;
9305 unsigned long r_symndx;
9306 asection *sym_sec;
9307 struct elf_link_hash_entry *h;
9308 Elf_Internal_Sym *sym;
9309 bfd_vma val, addr;
9310
9311 r_type = ELF64_R_TYPE (rel->r_info);
9312 if (r_type != R_PPC64_ADDR64)
9313 continue;
9314
9315 r_symndx = ELF64_R_SYM (rel->r_info);
9316 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9317 r_symndx, ibfd))
9318 goto error_ret;
9319
9320 if (sym_sec == NULL
9321 || sym_sec->output_section == NULL
9322 || discarded_section (sym_sec))
9323 continue;
9324
9325 if (!SYMBOL_REFERENCES_LOCAL (info, h))
9326 continue;
9327
9328 if (h != NULL)
9329 {
9330 if (h->type == STT_GNU_IFUNC)
9331 continue;
9332 val = h->root.u.def.value;
9333 }
9334 else
9335 {
9336 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
9337 continue;
9338 val = sym->st_value;
9339 }
9340 val += rel->r_addend;
9341 val += sym_sec->output_section->vma + sym_sec->output_offset;
9342
9343 /* We don't yet know the exact toc pointer value, but we
9344 know it will be somewhere in the toc section. Don't
9345 optimize if the difference from any possible toc
9346 pointer is outside [ff..f80008000, 7fff7fff]. */
9347 addr = toc->output_section->vma + TOC_BASE_OFF;
9348 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
9349 continue;
9350
9351 addr = toc->output_section->vma + toc->output_section->rawsize;
9352 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
9353 continue;
9354
9355 if (skip == NULL)
9356 {
9357 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
9358 if (skip == NULL)
9359 goto error_ret;
9360 }
9361
9362 skip[rel->r_offset >> 3]
9363 |= can_optimize | ((rel - toc_relocs) << 2);
9364 }
9365 }
9366
9367 if (skip == NULL)
9368 continue;
9369
9370 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
9371 if (used == NULL)
9372 {
9373 error_ret:
9374 if (local_syms != NULL
9375 && symtab_hdr->contents != (unsigned char *) local_syms)
9376 free (local_syms);
9377 if (sec != NULL
9378 && relstart != NULL
9379 && elf_section_data (sec)->relocs != relstart)
9380 free (relstart);
9381 if (toc_relocs != NULL
9382 && elf_section_data (toc)->relocs != toc_relocs)
9383 free (toc_relocs);
9384 if (skip != NULL)
9385 free (skip);
9386 return FALSE;
9387 }
9388
9389 /* Now check all kept sections that might reference the toc.
9390 Check the toc itself last. */
9391 for (sec = (ibfd->sections == toc && toc->next ? toc->next
9392 : ibfd->sections);
9393 sec != NULL;
9394 sec = (sec == toc ? NULL
9395 : sec->next == NULL ? toc
9396 : sec->next == toc && toc->next ? toc->next
9397 : sec->next))
9398 {
9399 int repeat;
9400
9401 if (sec->reloc_count == 0
9402 || discarded_section (sec)
9403 || get_opd_info (sec)
9404 || (sec->flags & SEC_ALLOC) == 0
9405 || (sec->flags & SEC_DEBUGGING) != 0)
9406 continue;
9407
9408 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
9409 info->keep_memory);
9410 if (relstart == NULL)
9411 {
9412 free (used);
9413 goto error_ret;
9414 }
9415
9416 /* Mark toc entries referenced as used. */
9417 do
9418 {
9419 repeat = 0;
9420 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
9421 {
9422 enum elf_ppc64_reloc_type r_type;
9423 unsigned long r_symndx;
9424 asection *sym_sec;
9425 struct elf_link_hash_entry *h;
9426 Elf_Internal_Sym *sym;
9427 bfd_vma val;
9428 enum {no_check, check_lo, check_ha} insn_check;
9429
9430 r_type = ELF64_R_TYPE (rel->r_info);
9431 switch (r_type)
9432 {
9433 default:
9434 insn_check = no_check;
9435 break;
9436
9437 case R_PPC64_GOT_TLSLD16_HA:
9438 case R_PPC64_GOT_TLSGD16_HA:
9439 case R_PPC64_GOT_TPREL16_HA:
9440 case R_PPC64_GOT_DTPREL16_HA:
9441 case R_PPC64_GOT16_HA:
9442 case R_PPC64_TOC16_HA:
9443 insn_check = check_ha;
9444 break;
9445
9446 case R_PPC64_GOT_TLSLD16_LO:
9447 case R_PPC64_GOT_TLSGD16_LO:
9448 case R_PPC64_GOT_TPREL16_LO_DS:
9449 case R_PPC64_GOT_DTPREL16_LO_DS:
9450 case R_PPC64_GOT16_LO:
9451 case R_PPC64_GOT16_LO_DS:
9452 case R_PPC64_TOC16_LO:
9453 case R_PPC64_TOC16_LO_DS:
9454 insn_check = check_lo;
9455 break;
9456 }
9457
9458 if (insn_check != no_check)
9459 {
9460 bfd_vma off = rel->r_offset & ~3;
9461 unsigned char buf[4];
9462 unsigned int insn;
9463
9464 if (!bfd_get_section_contents (ibfd, sec, buf, off, 4))
9465 {
9466 free (used);
9467 goto error_ret;
9468 }
9469 insn = bfd_get_32 (ibfd, buf);
9470 if (insn_check == check_lo
9471 ? !ok_lo_toc_insn (insn, r_type)
9472 : ((insn & ((0x3f << 26) | 0x1f << 16))
9473 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */))
9474 {
9475 char str[12];
9476
9477 ppc64_elf_tdata (ibfd)->unexpected_toc_insn = 1;
9478 sprintf (str, "%#08x", insn);
9479 info->callbacks->einfo
9480 /* xgettext:c-format */
9481 (_("%H: toc optimization is not supported for"
9482 " %s instruction\n"),
9483 ibfd, sec, rel->r_offset & ~3, str);
9484 }
9485 }
9486
9487 switch (r_type)
9488 {
9489 case R_PPC64_TOC16:
9490 case R_PPC64_TOC16_LO:
9491 case R_PPC64_TOC16_HI:
9492 case R_PPC64_TOC16_HA:
9493 case R_PPC64_TOC16_DS:
9494 case R_PPC64_TOC16_LO_DS:
9495 /* In case we're taking addresses of toc entries. */
9496 case R_PPC64_ADDR64:
9497 break;
9498
9499 default:
9500 continue;
9501 }
9502
9503 r_symndx = ELF64_R_SYM (rel->r_info);
9504 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9505 r_symndx, ibfd))
9506 {
9507 free (used);
9508 goto error_ret;
9509 }
9510
9511 if (sym_sec != toc)
9512 continue;
9513
9514 if (h != NULL)
9515 val = h->root.u.def.value;
9516 else
9517 val = sym->st_value;
9518 val += rel->r_addend;
9519
9520 if (val >= toc->size)
9521 continue;
9522
9523 if ((skip[val >> 3] & can_optimize) != 0)
9524 {
9525 bfd_vma off;
9526 unsigned char opc;
9527
9528 switch (r_type)
9529 {
9530 case R_PPC64_TOC16_HA:
9531 break;
9532
9533 case R_PPC64_TOC16_LO_DS:
9534 off = rel->r_offset;
9535 off += (bfd_big_endian (ibfd) ? -2 : 3);
9536 if (!bfd_get_section_contents (ibfd, sec, &opc,
9537 off, 1))
9538 {
9539 free (used);
9540 goto error_ret;
9541 }
9542 if ((opc & (0x3f << 2)) == (58u << 2))
9543 break;
9544 /* Fall through. */
9545
9546 default:
9547 /* Wrong sort of reloc, or not a ld. We may
9548 as well clear ref_from_discarded too. */
9549 skip[val >> 3] = 0;
9550 }
9551 }
9552
9553 if (sec != toc)
9554 used[val >> 3] = 1;
9555 /* For the toc section, we only mark as used if this
9556 entry itself isn't unused. */
9557 else if ((used[rel->r_offset >> 3]
9558 || !(skip[rel->r_offset >> 3] & ref_from_discarded))
9559 && !used[val >> 3])
9560 {
9561 /* Do all the relocs again, to catch reference
9562 chains. */
9563 repeat = 1;
9564 used[val >> 3] = 1;
9565 }
9566 }
9567 }
9568 while (repeat);
9569
9570 if (elf_section_data (sec)->relocs != relstart)
9571 free (relstart);
9572 }
9573
9574 /* Merge the used and skip arrays. Assume that TOC
9575 doublewords not appearing as either used or unused belong
9576 to an entry more than one doubleword in size. */
9577 for (drop = skip, keep = used, last = 0, some_unused = 0;
9578 drop < skip + (toc->size + 7) / 8;
9579 ++drop, ++keep)
9580 {
9581 if (*keep)
9582 {
9583 *drop &= ~ref_from_discarded;
9584 if ((*drop & can_optimize) != 0)
9585 some_unused = 1;
9586 last = 0;
9587 }
9588 else if ((*drop & ref_from_discarded) != 0)
9589 {
9590 some_unused = 1;
9591 last = ref_from_discarded;
9592 }
9593 else
9594 *drop = last;
9595 }
9596
9597 free (used);
9598
9599 if (some_unused)
9600 {
9601 bfd_byte *contents, *src;
9602 unsigned long off;
9603 Elf_Internal_Sym *sym;
9604 bfd_boolean local_toc_syms = FALSE;
9605
9606 /* Shuffle the toc contents, and at the same time convert the
9607 skip array from booleans into offsets. */
9608 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
9609 goto error_ret;
9610
9611 elf_section_data (toc)->this_hdr.contents = contents;
9612
9613 for (src = contents, off = 0, drop = skip;
9614 src < contents + toc->size;
9615 src += 8, ++drop)
9616 {
9617 if ((*drop & (can_optimize | ref_from_discarded)) != 0)
9618 off += 8;
9619 else if (off != 0)
9620 {
9621 *drop = off;
9622 memcpy (src - off, src, 8);
9623 }
9624 }
9625 *drop = off;
9626 toc->rawsize = toc->size;
9627 toc->size = src - contents - off;
9628
9629 /* Adjust addends for relocs against the toc section sym,
9630 and optimize any accesses we can. */
9631 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
9632 {
9633 if (sec->reloc_count == 0
9634 || discarded_section (sec))
9635 continue;
9636
9637 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
9638 info->keep_memory);
9639 if (relstart == NULL)
9640 goto error_ret;
9641
9642 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
9643 {
9644 enum elf_ppc64_reloc_type r_type;
9645 unsigned long r_symndx;
9646 asection *sym_sec;
9647 struct elf_link_hash_entry *h;
9648 bfd_vma val;
9649
9650 r_type = ELF64_R_TYPE (rel->r_info);
9651 switch (r_type)
9652 {
9653 default:
9654 continue;
9655
9656 case R_PPC64_TOC16:
9657 case R_PPC64_TOC16_LO:
9658 case R_PPC64_TOC16_HI:
9659 case R_PPC64_TOC16_HA:
9660 case R_PPC64_TOC16_DS:
9661 case R_PPC64_TOC16_LO_DS:
9662 case R_PPC64_ADDR64:
9663 break;
9664 }
9665
9666 r_symndx = ELF64_R_SYM (rel->r_info);
9667 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9668 r_symndx, ibfd))
9669 goto error_ret;
9670
9671 if (sym_sec != toc)
9672 continue;
9673
9674 if (h != NULL)
9675 val = h->root.u.def.value;
9676 else
9677 {
9678 val = sym->st_value;
9679 if (val != 0)
9680 local_toc_syms = TRUE;
9681 }
9682
9683 val += rel->r_addend;
9684
9685 if (val > toc->rawsize)
9686 val = toc->rawsize;
9687 else if ((skip[val >> 3] & ref_from_discarded) != 0)
9688 continue;
9689 else if ((skip[val >> 3] & can_optimize) != 0)
9690 {
9691 Elf_Internal_Rela *tocrel
9692 = toc_relocs + (skip[val >> 3] >> 2);
9693 unsigned long tsym = ELF64_R_SYM (tocrel->r_info);
9694
9695 switch (r_type)
9696 {
9697 case R_PPC64_TOC16_HA:
9698 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_TOC16_HA);
9699 break;
9700
9701 case R_PPC64_TOC16_LO_DS:
9702 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_LO_DS_OPT);
9703 break;
9704
9705 default:
9706 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
9707 ppc_howto_init ();
9708 info->callbacks->einfo
9709 /* xgettext:c-format */
9710 (_("%H: %s references "
9711 "optimized away TOC entry\n"),
9712 ibfd, sec, rel->r_offset,
9713 ppc64_elf_howto_table[r_type]->name);
9714 bfd_set_error (bfd_error_bad_value);
9715 goto error_ret;
9716 }
9717 rel->r_addend = tocrel->r_addend;
9718 elf_section_data (sec)->relocs = relstart;
9719 continue;
9720 }
9721
9722 if (h != NULL || sym->st_value != 0)
9723 continue;
9724
9725 rel->r_addend -= skip[val >> 3];
9726 elf_section_data (sec)->relocs = relstart;
9727 }
9728
9729 if (elf_section_data (sec)->relocs != relstart)
9730 free (relstart);
9731 }
9732
9733 /* We shouldn't have local or global symbols defined in the TOC,
9734 but handle them anyway. */
9735 if (local_syms != NULL)
9736 for (sym = local_syms;
9737 sym < local_syms + symtab_hdr->sh_info;
9738 ++sym)
9739 if (sym->st_value != 0
9740 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
9741 {
9742 unsigned long i;
9743
9744 if (sym->st_value > toc->rawsize)
9745 i = toc->rawsize >> 3;
9746 else
9747 i = sym->st_value >> 3;
9748
9749 if ((skip[i] & (ref_from_discarded | can_optimize)) != 0)
9750 {
9751 if (local_toc_syms)
9752 _bfd_error_handler
9753 (_("%s defined on removed toc entry"),
9754 bfd_elf_sym_name (ibfd, symtab_hdr, sym, NULL));
9755 do
9756 ++i;
9757 while ((skip[i] & (ref_from_discarded | can_optimize)));
9758 sym->st_value = (bfd_vma) i << 3;
9759 }
9760
9761 sym->st_value -= skip[i];
9762 symtab_hdr->contents = (unsigned char *) local_syms;
9763 }
9764
9765 /* Adjust any global syms defined in this toc input section. */
9766 if (toc_inf.global_toc_syms)
9767 {
9768 toc_inf.toc = toc;
9769 toc_inf.skip = skip;
9770 toc_inf.global_toc_syms = FALSE;
9771 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
9772 &toc_inf);
9773 }
9774
9775 if (toc->reloc_count != 0)
9776 {
9777 Elf_Internal_Shdr *rel_hdr;
9778 Elf_Internal_Rela *wrel;
9779 bfd_size_type sz;
9780
9781 /* Remove unused toc relocs, and adjust those we keep. */
9782 if (toc_relocs == NULL)
9783 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
9784 info->keep_memory);
9785 if (toc_relocs == NULL)
9786 goto error_ret;
9787
9788 wrel = toc_relocs;
9789 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
9790 if ((skip[rel->r_offset >> 3]
9791 & (ref_from_discarded | can_optimize)) == 0)
9792 {
9793 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
9794 wrel->r_info = rel->r_info;
9795 wrel->r_addend = rel->r_addend;
9796 ++wrel;
9797 }
9798 else if (!dec_dynrel_count (rel->r_info, toc, info,
9799 &local_syms, NULL, NULL))
9800 goto error_ret;
9801
9802 elf_section_data (toc)->relocs = toc_relocs;
9803 toc->reloc_count = wrel - toc_relocs;
9804 rel_hdr = _bfd_elf_single_rel_hdr (toc);
9805 sz = rel_hdr->sh_entsize;
9806 rel_hdr->sh_size = toc->reloc_count * sz;
9807 }
9808 }
9809 else if (toc_relocs != NULL
9810 && elf_section_data (toc)->relocs != toc_relocs)
9811 free (toc_relocs);
9812
9813 if (local_syms != NULL
9814 && symtab_hdr->contents != (unsigned char *) local_syms)
9815 {
9816 if (!info->keep_memory)
9817 free (local_syms);
9818 else
9819 symtab_hdr->contents = (unsigned char *) local_syms;
9820 }
9821 free (skip);
9822 }
9823
9824 return TRUE;
9825 }
9826
9827 /* Return true iff input section I references the TOC using
9828 instructions limited to +/-32k offsets. */
9829
9830 bfd_boolean
9831 ppc64_elf_has_small_toc_reloc (asection *i)
9832 {
9833 return (is_ppc64_elf (i->owner)
9834 && ppc64_elf_tdata (i->owner)->has_small_toc_reloc);
9835 }
9836
9837 /* Allocate space for one GOT entry. */
9838
9839 static void
9840 allocate_got (struct elf_link_hash_entry *h,
9841 struct bfd_link_info *info,
9842 struct got_entry *gent)
9843 {
9844 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9845 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
9846 int entsize = (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)
9847 ? 16 : 8);
9848 int rentsize = (gent->tls_type & eh->tls_mask & TLS_GD
9849 ? 2 : 1) * sizeof (Elf64_External_Rela);
9850 asection *got = ppc64_elf_tdata (gent->owner)->got;
9851
9852 gent->got.offset = got->size;
9853 got->size += entsize;
9854
9855 if (h->type == STT_GNU_IFUNC)
9856 {
9857 htab->elf.irelplt->size += rentsize;
9858 htab->got_reli_size += rentsize;
9859 }
9860 else if (((bfd_link_pic (info)
9861 && !((gent->tls_type & TLS_TPREL) != 0
9862 && bfd_link_executable (info)
9863 && SYMBOL_REFERENCES_LOCAL (info, h)))
9864 || (htab->elf.dynamic_sections_created
9865 && h->dynindx != -1
9866 && !SYMBOL_REFERENCES_LOCAL (info, h)))
9867 && !UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
9868 {
9869 asection *relgot = ppc64_elf_tdata (gent->owner)->relgot;
9870 relgot->size += rentsize;
9871 }
9872 }
9873
9874 /* This function merges got entries in the same toc group. */
9875
9876 static void
9877 merge_got_entries (struct got_entry **pent)
9878 {
9879 struct got_entry *ent, *ent2;
9880
9881 for (ent = *pent; ent != NULL; ent = ent->next)
9882 if (!ent->is_indirect)
9883 for (ent2 = ent->next; ent2 != NULL; ent2 = ent2->next)
9884 if (!ent2->is_indirect
9885 && ent2->addend == ent->addend
9886 && ent2->tls_type == ent->tls_type
9887 && elf_gp (ent2->owner) == elf_gp (ent->owner))
9888 {
9889 ent2->is_indirect = TRUE;
9890 ent2->got.ent = ent;
9891 }
9892 }
9893
9894 /* If H is undefined, make it dynamic if that makes sense. */
9895
9896 static bfd_boolean
9897 ensure_undef_dynamic (struct bfd_link_info *info,
9898 struct elf_link_hash_entry *h)
9899 {
9900 struct elf_link_hash_table *htab = elf_hash_table (info);
9901
9902 if (htab->dynamic_sections_created
9903 && ((info->dynamic_undefined_weak != 0
9904 && h->root.type == bfd_link_hash_undefweak)
9905 || h->root.type == bfd_link_hash_undefined)
9906 && h->dynindx == -1
9907 && !h->forced_local
9908 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
9909 return bfd_elf_link_record_dynamic_symbol (info, h);
9910 return TRUE;
9911 }
9912
9913 /* Allocate space in .plt, .got and associated reloc sections for
9914 dynamic relocs. */
9915
9916 static bfd_boolean
9917 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
9918 {
9919 struct bfd_link_info *info;
9920 struct ppc_link_hash_table *htab;
9921 asection *s;
9922 struct ppc_link_hash_entry *eh;
9923 struct got_entry **pgent, *gent;
9924
9925 if (h->root.type == bfd_link_hash_indirect)
9926 return TRUE;
9927
9928 info = (struct bfd_link_info *) inf;
9929 htab = ppc_hash_table (info);
9930 if (htab == NULL)
9931 return FALSE;
9932
9933 eh = (struct ppc_link_hash_entry *) h;
9934 /* Run through the TLS GD got entries first if we're changing them
9935 to TPREL. */
9936 if ((eh->tls_mask & (TLS_TLS | TLS_TPRELGD)) == (TLS_TLS | TLS_TPRELGD))
9937 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9938 if (gent->got.refcount > 0
9939 && (gent->tls_type & TLS_GD) != 0)
9940 {
9941 /* This was a GD entry that has been converted to TPREL. If
9942 there happens to be a TPREL entry we can use that one. */
9943 struct got_entry *ent;
9944 for (ent = h->got.glist; ent != NULL; ent = ent->next)
9945 if (ent->got.refcount > 0
9946 && (ent->tls_type & TLS_TPREL) != 0
9947 && ent->addend == gent->addend
9948 && ent->owner == gent->owner)
9949 {
9950 gent->got.refcount = 0;
9951 break;
9952 }
9953
9954 /* If not, then we'll be using our own TPREL entry. */
9955 if (gent->got.refcount != 0)
9956 gent->tls_type = TLS_TLS | TLS_TPREL;
9957 }
9958
9959 /* Remove any list entry that won't generate a word in the GOT before
9960 we call merge_got_entries. Otherwise we risk merging to empty
9961 entries. */
9962 pgent = &h->got.glist;
9963 while ((gent = *pgent) != NULL)
9964 if (gent->got.refcount > 0)
9965 {
9966 if ((gent->tls_type & TLS_LD) != 0
9967 && !h->def_dynamic)
9968 {
9969 ppc64_tlsld_got (gent->owner)->got.refcount += 1;
9970 *pgent = gent->next;
9971 }
9972 else
9973 pgent = &gent->next;
9974 }
9975 else
9976 *pgent = gent->next;
9977
9978 if (!htab->do_multi_toc)
9979 merge_got_entries (&h->got.glist);
9980
9981 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9982 if (!gent->is_indirect)
9983 {
9984 /* Make sure this symbol is output as a dynamic symbol. */
9985 if (!ensure_undef_dynamic (info, h))
9986 return FALSE;
9987
9988 if (!is_ppc64_elf (gent->owner))
9989 abort ();
9990
9991 allocate_got (h, info, gent);
9992 }
9993
9994 /* If no dynamic sections we can't have dynamic relocs, except for
9995 IFUNCs which are handled even in static executables. */
9996 if (!htab->elf.dynamic_sections_created
9997 && h->type != STT_GNU_IFUNC)
9998 eh->dyn_relocs = NULL;
9999
10000 /* Discard relocs on undefined symbols that must be local. */
10001 else if (h->root.type == bfd_link_hash_undefined
10002 && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
10003 eh->dyn_relocs = NULL;
10004
10005 /* Also discard relocs on undefined weak syms with non-default
10006 visibility, or when dynamic_undefined_weak says so. */
10007 else if (UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
10008 eh->dyn_relocs = NULL;
10009
10010 if (eh->dyn_relocs != NULL)
10011 {
10012 struct elf_dyn_relocs *p, **pp;
10013
10014 /* In the shared -Bsymbolic case, discard space allocated for
10015 dynamic pc-relative relocs against symbols which turn out to
10016 be defined in regular objects. For the normal shared case,
10017 discard space for relocs that have become local due to symbol
10018 visibility changes. */
10019
10020 if (bfd_link_pic (info))
10021 {
10022 /* Relocs that use pc_count are those that appear on a call
10023 insn, or certain REL relocs (see must_be_dyn_reloc) that
10024 can be generated via assembly. We want calls to
10025 protected symbols to resolve directly to the function
10026 rather than going via the plt. If people want function
10027 pointer comparisons to work as expected then they should
10028 avoid writing weird assembly. */
10029 if (SYMBOL_CALLS_LOCAL (info, h))
10030 {
10031 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
10032 {
10033 p->count -= p->pc_count;
10034 p->pc_count = 0;
10035 if (p->count == 0)
10036 *pp = p->next;
10037 else
10038 pp = &p->next;
10039 }
10040 }
10041
10042 if (eh->dyn_relocs != NULL)
10043 {
10044 /* Make sure this symbol is output as a dynamic symbol. */
10045 if (!ensure_undef_dynamic (info, h))
10046 return FALSE;
10047 }
10048 }
10049 else if (ELIMINATE_COPY_RELOCS && h->type != STT_GNU_IFUNC)
10050 {
10051 /* For the non-pic case, discard space for relocs against
10052 symbols which turn out to need copy relocs or are not
10053 dynamic. */
10054 if (h->dynamic_adjusted
10055 && !h->def_regular
10056 && !ELF_COMMON_DEF_P (h))
10057 {
10058 /* Make sure this symbol is output as a dynamic symbol. */
10059 if (!ensure_undef_dynamic (info, h))
10060 return FALSE;
10061
10062 if (h->dynindx == -1)
10063 eh->dyn_relocs = NULL;
10064 }
10065 else
10066 eh->dyn_relocs = NULL;
10067 }
10068
10069 /* Finally, allocate space. */
10070 for (p = eh->dyn_relocs; p != NULL; p = p->next)
10071 {
10072 asection *sreloc = elf_section_data (p->sec)->sreloc;
10073 if (eh->elf.type == STT_GNU_IFUNC)
10074 sreloc = htab->elf.irelplt;
10075 sreloc->size += p->count * sizeof (Elf64_External_Rela);
10076 }
10077 }
10078
10079 /* We might need a PLT entry when the symbol
10080 a) is dynamic, or
10081 b) is an ifunc, or
10082 c) has plt16 relocs and has been processed by adjust_dynamic_symbol, or
10083 d) has plt16 relocs and we are linking statically. */
10084 if ((htab->elf.dynamic_sections_created && h->dynindx != -1)
10085 || h->type == STT_GNU_IFUNC
10086 || (h->needs_plt && h->dynamic_adjusted)
10087 || (h->needs_plt
10088 && h->def_regular
10089 && !htab->elf.dynamic_sections_created
10090 && !htab->can_convert_all_inline_plt
10091 && (((struct ppc_link_hash_entry *) h)->tls_mask
10092 & (TLS_TLS | PLT_KEEP)) == PLT_KEEP))
10093 {
10094 struct plt_entry *pent;
10095 bfd_boolean doneone = FALSE;
10096 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
10097 if (pent->plt.refcount > 0)
10098 {
10099 if (!htab->elf.dynamic_sections_created
10100 || h->dynindx == -1)
10101 {
10102 if (h->type == STT_GNU_IFUNC)
10103 {
10104 s = htab->elf.iplt;
10105 pent->plt.offset = s->size;
10106 s->size += PLT_ENTRY_SIZE (htab);
10107 s = htab->elf.irelplt;
10108 }
10109 else
10110 {
10111 s = htab->pltlocal;
10112 pent->plt.offset = s->size;
10113 s->size += LOCAL_PLT_ENTRY_SIZE (htab);
10114 s = bfd_link_pic (info) ? htab->relpltlocal : NULL;
10115 }
10116 }
10117 else
10118 {
10119 /* If this is the first .plt entry, make room for the special
10120 first entry. */
10121 s = htab->elf.splt;
10122 if (s->size == 0)
10123 s->size += PLT_INITIAL_ENTRY_SIZE (htab);
10124
10125 pent->plt.offset = s->size;
10126
10127 /* Make room for this entry. */
10128 s->size += PLT_ENTRY_SIZE (htab);
10129
10130 /* Make room for the .glink code. */
10131 s = htab->glink;
10132 if (s->size == 0)
10133 s->size += GLINK_PLTRESOLVE_SIZE (htab);
10134 if (htab->opd_abi)
10135 {
10136 /* We need bigger stubs past index 32767. */
10137 if (s->size >= GLINK_PLTRESOLVE_SIZE (htab) + 32768*2*4)
10138 s->size += 4;
10139 s->size += 2*4;
10140 }
10141 else
10142 s->size += 4;
10143
10144 /* We also need to make an entry in the .rela.plt section. */
10145 s = htab->elf.srelplt;
10146 }
10147 if (s != NULL)
10148 s->size += sizeof (Elf64_External_Rela);
10149 doneone = TRUE;
10150 }
10151 else
10152 pent->plt.offset = (bfd_vma) -1;
10153 if (!doneone)
10154 {
10155 h->plt.plist = NULL;
10156 h->needs_plt = 0;
10157 }
10158 }
10159 else
10160 {
10161 h->plt.plist = NULL;
10162 h->needs_plt = 0;
10163 }
10164
10165 return TRUE;
10166 }
10167
10168 #define PPC_LO(v) ((v) & 0xffff)
10169 #define PPC_HI(v) (((v) >> 16) & 0xffff)
10170 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
10171
10172 /* Called via elf_link_hash_traverse from ppc64_elf_size_dynamic_sections
10173 to set up space for global entry stubs. These are put in glink,
10174 after the branch table. */
10175
10176 static bfd_boolean
10177 size_global_entry_stubs (struct elf_link_hash_entry *h, void *inf)
10178 {
10179 struct bfd_link_info *info;
10180 struct ppc_link_hash_table *htab;
10181 struct plt_entry *pent;
10182 asection *s, *plt;
10183
10184 if (h->root.type == bfd_link_hash_indirect)
10185 return TRUE;
10186
10187 if (!h->pointer_equality_needed)
10188 return TRUE;
10189
10190 if (h->def_regular)
10191 return TRUE;
10192
10193 info = inf;
10194 htab = ppc_hash_table (info);
10195 if (htab == NULL)
10196 return FALSE;
10197
10198 s = htab->global_entry;
10199 plt = htab->elf.splt;
10200 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
10201 if (pent->plt.offset != (bfd_vma) -1
10202 && pent->addend == 0)
10203 {
10204 /* For ELFv2, if this symbol is not defined in a regular file
10205 and we are not generating a shared library or pie, then we
10206 need to define the symbol in the executable on a call stub.
10207 This is to avoid text relocations. */
10208 bfd_vma off, stub_align, stub_off, stub_size;
10209 unsigned int align_power;
10210
10211 stub_size = 16;
10212 stub_off = s->size;
10213 if (htab->params->plt_stub_align >= 0)
10214 align_power = htab->params->plt_stub_align;
10215 else
10216 align_power = -htab->params->plt_stub_align;
10217 /* Setting section alignment is delayed until we know it is
10218 non-empty. Otherwise the .text output section will be
10219 aligned at least to plt_stub_align even when no global
10220 entry stubs are needed. */
10221 if (s->alignment_power < align_power)
10222 s->alignment_power = align_power;
10223 stub_align = (bfd_vma) 1 << align_power;
10224 if (htab->params->plt_stub_align >= 0
10225 || ((((stub_off + stub_size - 1) & -stub_align)
10226 - (stub_off & -stub_align))
10227 > ((stub_size - 1) & -stub_align)))
10228 stub_off = (stub_off + stub_align - 1) & -stub_align;
10229 off = pent->plt.offset + plt->output_offset + plt->output_section->vma;
10230 off -= stub_off + s->output_offset + s->output_section->vma;
10231 /* Note that for --plt-stub-align negative we have a possible
10232 dependency between stub offset and size. Break that
10233 dependency by assuming the max stub size when calculating
10234 the stub offset. */
10235 if (PPC_HA (off) == 0)
10236 stub_size -= 4;
10237 h->root.type = bfd_link_hash_defined;
10238 h->root.u.def.section = s;
10239 h->root.u.def.value = stub_off;
10240 s->size = stub_off + stub_size;
10241 break;
10242 }
10243 return TRUE;
10244 }
10245
10246 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
10247 read-only sections. */
10248
10249 static bfd_boolean
10250 maybe_set_textrel (struct elf_link_hash_entry *h, void *inf)
10251 {
10252 asection *sec;
10253
10254 if (h->root.type == bfd_link_hash_indirect)
10255 return TRUE;
10256
10257 sec = readonly_dynrelocs (h);
10258 if (sec != NULL)
10259 {
10260 struct bfd_link_info *info = (struct bfd_link_info *) inf;
10261
10262 info->flags |= DF_TEXTREL;
10263 info->callbacks->minfo
10264 (_("%pB: dynamic relocation against `%pT' in read-only section `%pA'\n"),
10265 sec->owner, h->root.root.string, sec);
10266
10267 /* Not an error, just cut short the traversal. */
10268 return FALSE;
10269 }
10270 return TRUE;
10271 }
10272
10273 /* Set the sizes of the dynamic sections. */
10274
10275 static bfd_boolean
10276 ppc64_elf_size_dynamic_sections (bfd *output_bfd,
10277 struct bfd_link_info *info)
10278 {
10279 struct ppc_link_hash_table *htab;
10280 bfd *dynobj;
10281 asection *s;
10282 bfd_boolean relocs;
10283 bfd *ibfd;
10284 struct got_entry *first_tlsld;
10285
10286 htab = ppc_hash_table (info);
10287 if (htab == NULL)
10288 return FALSE;
10289
10290 dynobj = htab->elf.dynobj;
10291 if (dynobj == NULL)
10292 abort ();
10293
10294 if (htab->elf.dynamic_sections_created)
10295 {
10296 /* Set the contents of the .interp section to the interpreter. */
10297 if (bfd_link_executable (info) && !info->nointerp)
10298 {
10299 s = bfd_get_linker_section (dynobj, ".interp");
10300 if (s == NULL)
10301 abort ();
10302 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
10303 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
10304 }
10305 }
10306
10307 /* Set up .got offsets for local syms, and space for local dynamic
10308 relocs. */
10309 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
10310 {
10311 struct got_entry **lgot_ents;
10312 struct got_entry **end_lgot_ents;
10313 struct plt_entry **local_plt;
10314 struct plt_entry **end_local_plt;
10315 unsigned char *lgot_masks;
10316 bfd_size_type locsymcount;
10317 Elf_Internal_Shdr *symtab_hdr;
10318
10319 if (!is_ppc64_elf (ibfd))
10320 continue;
10321
10322 for (s = ibfd->sections; s != NULL; s = s->next)
10323 {
10324 struct ppc_dyn_relocs *p;
10325
10326 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
10327 {
10328 if (!bfd_is_abs_section (p->sec)
10329 && bfd_is_abs_section (p->sec->output_section))
10330 {
10331 /* Input section has been discarded, either because
10332 it is a copy of a linkonce section or due to
10333 linker script /DISCARD/, so we'll be discarding
10334 the relocs too. */
10335 }
10336 else if (p->count != 0)
10337 {
10338 asection *srel = elf_section_data (p->sec)->sreloc;
10339 if (p->ifunc)
10340 srel = htab->elf.irelplt;
10341 srel->size += p->count * sizeof (Elf64_External_Rela);
10342 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
10343 info->flags |= DF_TEXTREL;
10344 }
10345 }
10346 }
10347
10348 lgot_ents = elf_local_got_ents (ibfd);
10349 if (!lgot_ents)
10350 continue;
10351
10352 symtab_hdr = &elf_symtab_hdr (ibfd);
10353 locsymcount = symtab_hdr->sh_info;
10354 end_lgot_ents = lgot_ents + locsymcount;
10355 local_plt = (struct plt_entry **) end_lgot_ents;
10356 end_local_plt = local_plt + locsymcount;
10357 lgot_masks = (unsigned char *) end_local_plt;
10358 s = ppc64_elf_tdata (ibfd)->got;
10359 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
10360 {
10361 struct got_entry **pent, *ent;
10362
10363 pent = lgot_ents;
10364 while ((ent = *pent) != NULL)
10365 if (ent->got.refcount > 0)
10366 {
10367 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
10368 {
10369 ppc64_tlsld_got (ibfd)->got.refcount += 1;
10370 *pent = ent->next;
10371 }
10372 else
10373 {
10374 unsigned int ent_size = 8;
10375 unsigned int rel_size = sizeof (Elf64_External_Rela);
10376
10377 ent->got.offset = s->size;
10378 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
10379 {
10380 ent_size *= 2;
10381 rel_size *= 2;
10382 }
10383 s->size += ent_size;
10384 if ((*lgot_masks & (TLS_TLS | PLT_IFUNC)) == PLT_IFUNC)
10385 {
10386 htab->elf.irelplt->size += rel_size;
10387 htab->got_reli_size += rel_size;
10388 }
10389 else if (bfd_link_pic (info)
10390 && !((ent->tls_type & TLS_TPREL) != 0
10391 && bfd_link_executable (info)))
10392 {
10393 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
10394 srel->size += rel_size;
10395 }
10396 pent = &ent->next;
10397 }
10398 }
10399 else
10400 *pent = ent->next;
10401 }
10402
10403 /* Allocate space for plt calls to local syms. */
10404 lgot_masks = (unsigned char *) end_local_plt;
10405 for (; local_plt < end_local_plt; ++local_plt, ++lgot_masks)
10406 {
10407 struct plt_entry *ent;
10408
10409 for (ent = *local_plt; ent != NULL; ent = ent->next)
10410 if (ent->plt.refcount > 0)
10411 {
10412 if ((*lgot_masks & (TLS_TLS | PLT_IFUNC)) == PLT_IFUNC)
10413 {
10414 s = htab->elf.iplt;
10415 ent->plt.offset = s->size;
10416 s->size += PLT_ENTRY_SIZE (htab);
10417 htab->elf.irelplt->size += sizeof (Elf64_External_Rela);
10418 }
10419 else if (htab->can_convert_all_inline_plt
10420 || (*lgot_masks & (TLS_TLS | PLT_KEEP)) != PLT_KEEP)
10421 ent->plt.offset = (bfd_vma) -1;
10422 else
10423 {
10424 s = htab->pltlocal;
10425 ent->plt.offset = s->size;
10426 s->size += LOCAL_PLT_ENTRY_SIZE (htab);
10427 if (bfd_link_pic (info))
10428 htab->relpltlocal->size += sizeof (Elf64_External_Rela);
10429 }
10430 }
10431 else
10432 ent->plt.offset = (bfd_vma) -1;
10433 }
10434 }
10435
10436 /* Allocate global sym .plt and .got entries, and space for global
10437 sym dynamic relocs. */
10438 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
10439
10440 if (!htab->opd_abi && !bfd_link_pic (info))
10441 elf_link_hash_traverse (&htab->elf, size_global_entry_stubs, info);
10442
10443 first_tlsld = NULL;
10444 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
10445 {
10446 struct got_entry *ent;
10447
10448 if (!is_ppc64_elf (ibfd))
10449 continue;
10450
10451 ent = ppc64_tlsld_got (ibfd);
10452 if (ent->got.refcount > 0)
10453 {
10454 if (!htab->do_multi_toc && first_tlsld != NULL)
10455 {
10456 ent->is_indirect = TRUE;
10457 ent->got.ent = first_tlsld;
10458 }
10459 else
10460 {
10461 if (first_tlsld == NULL)
10462 first_tlsld = ent;
10463 s = ppc64_elf_tdata (ibfd)->got;
10464 ent->got.offset = s->size;
10465 ent->owner = ibfd;
10466 s->size += 16;
10467 if (bfd_link_pic (info))
10468 {
10469 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
10470 srel->size += sizeof (Elf64_External_Rela);
10471 }
10472 }
10473 }
10474 else
10475 ent->got.offset = (bfd_vma) -1;
10476 }
10477
10478 /* We now have determined the sizes of the various dynamic sections.
10479 Allocate memory for them. */
10480 relocs = FALSE;
10481 for (s = dynobj->sections; s != NULL; s = s->next)
10482 {
10483 if ((s->flags & SEC_LINKER_CREATED) == 0)
10484 continue;
10485
10486 if (s == htab->brlt || s == htab->relbrlt)
10487 /* These haven't been allocated yet; don't strip. */
10488 continue;
10489 else if (s == htab->elf.sgot
10490 || s == htab->elf.splt
10491 || s == htab->elf.iplt
10492 || s == htab->pltlocal
10493 || s == htab->glink
10494 || s == htab->global_entry
10495 || s == htab->elf.sdynbss
10496 || s == htab->elf.sdynrelro)
10497 {
10498 /* Strip this section if we don't need it; see the
10499 comment below. */
10500 }
10501 else if (s == htab->glink_eh_frame)
10502 {
10503 if (!bfd_is_abs_section (s->output_section))
10504 /* Not sized yet. */
10505 continue;
10506 }
10507 else if (CONST_STRNEQ (s->name, ".rela"))
10508 {
10509 if (s->size != 0)
10510 {
10511 if (s != htab->elf.srelplt)
10512 relocs = TRUE;
10513
10514 /* We use the reloc_count field as a counter if we need
10515 to copy relocs into the output file. */
10516 s->reloc_count = 0;
10517 }
10518 }
10519 else
10520 {
10521 /* It's not one of our sections, so don't allocate space. */
10522 continue;
10523 }
10524
10525 if (s->size == 0)
10526 {
10527 /* If we don't need this section, strip it from the
10528 output file. This is mostly to handle .rela.bss and
10529 .rela.plt. We must create both sections in
10530 create_dynamic_sections, because they must be created
10531 before the linker maps input sections to output
10532 sections. The linker does that before
10533 adjust_dynamic_symbol is called, and it is that
10534 function which decides whether anything needs to go
10535 into these sections. */
10536 s->flags |= SEC_EXCLUDE;
10537 continue;
10538 }
10539
10540 if (bfd_is_abs_section (s->output_section))
10541 _bfd_error_handler (_("warning: discarding dynamic section %s"),
10542 s->name);
10543
10544 if ((s->flags & SEC_HAS_CONTENTS) == 0)
10545 continue;
10546
10547 /* Allocate memory for the section contents. We use bfd_zalloc
10548 here in case unused entries are not reclaimed before the
10549 section's contents are written out. This should not happen,
10550 but this way if it does we get a R_PPC64_NONE reloc in .rela
10551 sections instead of garbage.
10552 We also rely on the section contents being zero when writing
10553 the GOT and .dynrelro. */
10554 s->contents = bfd_zalloc (dynobj, s->size);
10555 if (s->contents == NULL)
10556 return FALSE;
10557 }
10558
10559 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
10560 {
10561 if (!is_ppc64_elf (ibfd))
10562 continue;
10563
10564 s = ppc64_elf_tdata (ibfd)->got;
10565 if (s != NULL && s != htab->elf.sgot)
10566 {
10567 if (s->size == 0)
10568 s->flags |= SEC_EXCLUDE;
10569 else
10570 {
10571 s->contents = bfd_zalloc (ibfd, s->size);
10572 if (s->contents == NULL)
10573 return FALSE;
10574 }
10575 }
10576 s = ppc64_elf_tdata (ibfd)->relgot;
10577 if (s != NULL)
10578 {
10579 if (s->size == 0)
10580 s->flags |= SEC_EXCLUDE;
10581 else
10582 {
10583 s->contents = bfd_zalloc (ibfd, s->size);
10584 if (s->contents == NULL)
10585 return FALSE;
10586 relocs = TRUE;
10587 s->reloc_count = 0;
10588 }
10589 }
10590 }
10591
10592 if (htab->elf.dynamic_sections_created)
10593 {
10594 bfd_boolean tls_opt;
10595
10596 /* Add some entries to the .dynamic section. We fill in the
10597 values later, in ppc64_elf_finish_dynamic_sections, but we
10598 must add the entries now so that we get the correct size for
10599 the .dynamic section. The DT_DEBUG entry is filled in by the
10600 dynamic linker and used by the debugger. */
10601 #define add_dynamic_entry(TAG, VAL) \
10602 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
10603
10604 if (bfd_link_executable (info))
10605 {
10606 if (!add_dynamic_entry (DT_DEBUG, 0))
10607 return FALSE;
10608 }
10609
10610 if (htab->elf.splt != NULL && htab->elf.splt->size != 0)
10611 {
10612 if (!add_dynamic_entry (DT_PLTGOT, 0)
10613 || !add_dynamic_entry (DT_PLTRELSZ, 0)
10614 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
10615 || !add_dynamic_entry (DT_JMPREL, 0)
10616 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
10617 return FALSE;
10618 }
10619
10620 if (NO_OPD_RELOCS && abiversion (output_bfd) <= 1)
10621 {
10622 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
10623 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
10624 return FALSE;
10625 }
10626
10627 tls_opt = (htab->params->tls_get_addr_opt
10628 && htab->tls_get_addr_fd != NULL
10629 && htab->tls_get_addr_fd->elf.plt.plist != NULL);
10630 if (tls_opt || !htab->opd_abi)
10631 {
10632 if (!add_dynamic_entry (DT_PPC64_OPT, tls_opt ? PPC64_OPT_TLS : 0))
10633 return FALSE;
10634 }
10635
10636 if (relocs)
10637 {
10638 if (!add_dynamic_entry (DT_RELA, 0)
10639 || !add_dynamic_entry (DT_RELASZ, 0)
10640 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
10641 return FALSE;
10642
10643 /* If any dynamic relocs apply to a read-only section,
10644 then we need a DT_TEXTREL entry. */
10645 if ((info->flags & DF_TEXTREL) == 0)
10646 elf_link_hash_traverse (&htab->elf, maybe_set_textrel, info);
10647
10648 if ((info->flags & DF_TEXTREL) != 0)
10649 {
10650 if (!add_dynamic_entry (DT_TEXTREL, 0))
10651 return FALSE;
10652 }
10653 }
10654 }
10655 #undef add_dynamic_entry
10656
10657 return TRUE;
10658 }
10659
10660 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
10661
10662 static bfd_boolean
10663 ppc64_elf_hash_symbol (struct elf_link_hash_entry *h)
10664 {
10665 if (h->plt.plist != NULL
10666 && !h->def_regular
10667 && !h->pointer_equality_needed)
10668 return FALSE;
10669
10670 return _bfd_elf_hash_symbol (h);
10671 }
10672
10673 /* Determine the type of stub needed, if any, for a call. */
10674
10675 static inline enum ppc_stub_type
10676 ppc_type_of_stub (asection *input_sec,
10677 const Elf_Internal_Rela *rel,
10678 struct ppc_link_hash_entry **hash,
10679 struct plt_entry **plt_ent,
10680 bfd_vma destination,
10681 unsigned long local_off)
10682 {
10683 struct ppc_link_hash_entry *h = *hash;
10684 bfd_vma location;
10685 bfd_vma branch_offset;
10686 bfd_vma max_branch_offset;
10687 enum elf_ppc64_reloc_type r_type;
10688
10689 if (h != NULL)
10690 {
10691 struct plt_entry *ent;
10692 struct ppc_link_hash_entry *fdh = h;
10693 if (h->oh != NULL
10694 && h->oh->is_func_descriptor)
10695 {
10696 fdh = ppc_follow_link (h->oh);
10697 *hash = fdh;
10698 }
10699
10700 for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next)
10701 if (ent->addend == rel->r_addend
10702 && ent->plt.offset != (bfd_vma) -1)
10703 {
10704 *plt_ent = ent;
10705 return ppc_stub_plt_call;
10706 }
10707
10708 /* Here, we know we don't have a plt entry. If we don't have a
10709 either a defined function descriptor or a defined entry symbol
10710 in a regular object file, then it is pointless trying to make
10711 any other type of stub. */
10712 if (!is_static_defined (&fdh->elf)
10713 && !is_static_defined (&h->elf))
10714 return ppc_stub_none;
10715 }
10716 else if (elf_local_got_ents (input_sec->owner) != NULL)
10717 {
10718 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (input_sec->owner);
10719 struct plt_entry **local_plt = (struct plt_entry **)
10720 elf_local_got_ents (input_sec->owner) + symtab_hdr->sh_info;
10721 unsigned long r_symndx = ELF64_R_SYM (rel->r_info);
10722
10723 if (local_plt[r_symndx] != NULL)
10724 {
10725 struct plt_entry *ent;
10726
10727 for (ent = local_plt[r_symndx]; ent != NULL; ent = ent->next)
10728 if (ent->addend == rel->r_addend
10729 && ent->plt.offset != (bfd_vma) -1)
10730 {
10731 *plt_ent = ent;
10732 return ppc_stub_plt_call;
10733 }
10734 }
10735 }
10736
10737 /* Determine where the call point is. */
10738 location = (input_sec->output_offset
10739 + input_sec->output_section->vma
10740 + rel->r_offset);
10741
10742 branch_offset = destination - location;
10743 r_type = ELF64_R_TYPE (rel->r_info);
10744
10745 /* Determine if a long branch stub is needed. */
10746 max_branch_offset = 1 << 25;
10747 if (r_type == R_PPC64_REL14
10748 || r_type == R_PPC64_REL14_BRTAKEN
10749 || r_type == R_PPC64_REL14_BRNTAKEN)
10750 max_branch_offset = 1 << 15;
10751
10752 if (branch_offset + max_branch_offset >= 2 * max_branch_offset - local_off)
10753 /* We need a stub. Figure out whether a long_branch or plt_branch
10754 is needed later. */
10755 return ppc_stub_long_branch;
10756
10757 return ppc_stub_none;
10758 }
10759
10760 /* With power7 weakly ordered memory model, it is possible for ld.so
10761 to update a plt entry in one thread and have another thread see a
10762 stale zero toc entry. To avoid this we need some sort of acquire
10763 barrier in the call stub. One solution is to make the load of the
10764 toc word seem to appear to depend on the load of the function entry
10765 word. Another solution is to test for r2 being zero, and branch to
10766 the appropriate glink entry if so.
10767
10768 . fake dep barrier compare
10769 . ld 12,xxx(2) ld 12,xxx(2)
10770 . mtctr 12 mtctr 12
10771 . xor 11,12,12 ld 2,xxx+8(2)
10772 . add 2,2,11 cmpldi 2,0
10773 . ld 2,xxx+8(2) bnectr+
10774 . bctr b <glink_entry>
10775
10776 The solution involving the compare turns out to be faster, so
10777 that's what we use unless the branch won't reach. */
10778
10779 #define ALWAYS_USE_FAKE_DEP 0
10780 #define ALWAYS_EMIT_R2SAVE 0
10781
10782 static inline unsigned int
10783 plt_stub_size (struct ppc_link_hash_table *htab,
10784 struct ppc_stub_hash_entry *stub_entry,
10785 bfd_vma off)
10786 {
10787 unsigned size = 12;
10788
10789 if (ALWAYS_EMIT_R2SAVE
10790 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10791 size += 4;
10792 if (PPC_HA (off) != 0)
10793 size += 4;
10794 if (htab->opd_abi)
10795 {
10796 size += 4;
10797 if (htab->params->plt_static_chain)
10798 size += 4;
10799 if (htab->params->plt_thread_safe
10800 && htab->elf.dynamic_sections_created
10801 && stub_entry->h != NULL
10802 && stub_entry->h->elf.dynindx != -1)
10803 size += 8;
10804 if (PPC_HA (off + 8 + 8 * htab->params->plt_static_chain) != PPC_HA (off))
10805 size += 4;
10806 }
10807 if (stub_entry->h != NULL
10808 && (stub_entry->h == htab->tls_get_addr_fd
10809 || stub_entry->h == htab->tls_get_addr)
10810 && htab->params->tls_get_addr_opt)
10811 {
10812 size += 7 * 4;
10813 if (ALWAYS_EMIT_R2SAVE
10814 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10815 size += 6 * 4;
10816 }
10817 return size;
10818 }
10819
10820 /* Depending on the sign of plt_stub_align:
10821 If positive, return the padding to align to a 2**plt_stub_align
10822 boundary.
10823 If negative, if this stub would cross fewer 2**plt_stub_align
10824 boundaries if we align, then return the padding needed to do so. */
10825
10826 static inline unsigned int
10827 plt_stub_pad (struct ppc_link_hash_table *htab,
10828 struct ppc_stub_hash_entry *stub_entry,
10829 bfd_vma plt_off)
10830 {
10831 int stub_align;
10832 unsigned stub_size = plt_stub_size (htab, stub_entry, plt_off);
10833 bfd_vma stub_off = stub_entry->group->stub_sec->size;
10834
10835 if (htab->params->plt_stub_align >= 0)
10836 {
10837 stub_align = 1 << htab->params->plt_stub_align;
10838 if ((stub_off & (stub_align - 1)) != 0)
10839 return stub_align - (stub_off & (stub_align - 1));
10840 return 0;
10841 }
10842
10843 stub_align = 1 << -htab->params->plt_stub_align;
10844 if (((stub_off + stub_size - 1) & -stub_align) - (stub_off & -stub_align)
10845 > ((stub_size - 1) & -stub_align))
10846 return stub_align - (stub_off & (stub_align - 1));
10847 return 0;
10848 }
10849
10850 /* Build a .plt call stub. */
10851
10852 static inline bfd_byte *
10853 build_plt_stub (struct ppc_link_hash_table *htab,
10854 struct ppc_stub_hash_entry *stub_entry,
10855 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
10856 {
10857 bfd *obfd = htab->params->stub_bfd;
10858 bfd_boolean plt_load_toc = htab->opd_abi;
10859 bfd_boolean plt_static_chain = htab->params->plt_static_chain;
10860 bfd_boolean plt_thread_safe = (htab->params->plt_thread_safe
10861 && htab->elf.dynamic_sections_created
10862 && stub_entry->h != NULL
10863 && stub_entry->h->elf.dynindx != -1);
10864 bfd_boolean use_fake_dep = plt_thread_safe;
10865 bfd_vma cmp_branch_off = 0;
10866
10867 if (!ALWAYS_USE_FAKE_DEP
10868 && plt_load_toc
10869 && plt_thread_safe
10870 && !((stub_entry->h == htab->tls_get_addr_fd
10871 || stub_entry->h == htab->tls_get_addr)
10872 && htab->params->tls_get_addr_opt))
10873 {
10874 bfd_vma pltoff = stub_entry->plt_ent->plt.offset & ~1;
10875 bfd_vma pltindex = ((pltoff - PLT_INITIAL_ENTRY_SIZE (htab))
10876 / PLT_ENTRY_SIZE (htab));
10877 bfd_vma glinkoff = GLINK_PLTRESOLVE_SIZE (htab) + pltindex * 8;
10878 bfd_vma to, from;
10879
10880 if (pltindex > 32768)
10881 glinkoff += (pltindex - 32768) * 4;
10882 to = (glinkoff
10883 + htab->glink->output_offset
10884 + htab->glink->output_section->vma);
10885 from = (p - stub_entry->group->stub_sec->contents
10886 + 4 * (ALWAYS_EMIT_R2SAVE
10887 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10888 + 4 * (PPC_HA (offset) != 0)
10889 + 4 * (PPC_HA (offset + 8 + 8 * plt_static_chain)
10890 != PPC_HA (offset))
10891 + 4 * (plt_static_chain != 0)
10892 + 20
10893 + stub_entry->group->stub_sec->output_offset
10894 + stub_entry->group->stub_sec->output_section->vma);
10895 cmp_branch_off = to - from;
10896 use_fake_dep = cmp_branch_off + (1 << 25) >= (1 << 26);
10897 }
10898
10899 if (PPC_HA (offset) != 0)
10900 {
10901 if (r != NULL)
10902 {
10903 if (ALWAYS_EMIT_R2SAVE
10904 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10905 r[0].r_offset += 4;
10906 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
10907 r[1].r_offset = r[0].r_offset + 4;
10908 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10909 r[1].r_addend = r[0].r_addend;
10910 if (plt_load_toc)
10911 {
10912 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10913 {
10914 r[2].r_offset = r[1].r_offset + 4;
10915 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO);
10916 r[2].r_addend = r[0].r_addend;
10917 }
10918 else
10919 {
10920 r[2].r_offset = r[1].r_offset + 8 + 8 * use_fake_dep;
10921 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10922 r[2].r_addend = r[0].r_addend + 8;
10923 if (plt_static_chain)
10924 {
10925 r[3].r_offset = r[2].r_offset + 4;
10926 r[3].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10927 r[3].r_addend = r[0].r_addend + 16;
10928 }
10929 }
10930 }
10931 }
10932 if (ALWAYS_EMIT_R2SAVE
10933 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10934 bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p), p += 4;
10935 if (plt_load_toc)
10936 {
10937 bfd_put_32 (obfd, ADDIS_R11_R2 | PPC_HA (offset), p), p += 4;
10938 bfd_put_32 (obfd, LD_R12_0R11 | PPC_LO (offset), p), p += 4;
10939 }
10940 else
10941 {
10942 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
10943 bfd_put_32 (obfd, LD_R12_0R12 | PPC_LO (offset), p), p += 4;
10944 }
10945 if (plt_load_toc
10946 && PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10947 {
10948 bfd_put_32 (obfd, ADDI_R11_R11 | PPC_LO (offset), p), p += 4;
10949 offset = 0;
10950 }
10951 bfd_put_32 (obfd, MTCTR_R12, p), p += 4;
10952 if (plt_load_toc)
10953 {
10954 if (use_fake_dep)
10955 {
10956 bfd_put_32 (obfd, XOR_R2_R12_R12, p), p += 4;
10957 bfd_put_32 (obfd, ADD_R11_R11_R2, p), p += 4;
10958 }
10959 bfd_put_32 (obfd, LD_R2_0R11 | PPC_LO (offset + 8), p), p += 4;
10960 if (plt_static_chain)
10961 bfd_put_32 (obfd, LD_R11_0R11 | PPC_LO (offset + 16), p), p += 4;
10962 }
10963 }
10964 else
10965 {
10966 if (r != NULL)
10967 {
10968 if (ALWAYS_EMIT_R2SAVE
10969 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10970 r[0].r_offset += 4;
10971 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10972 if (plt_load_toc)
10973 {
10974 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10975 {
10976 r[1].r_offset = r[0].r_offset + 4;
10977 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16);
10978 r[1].r_addend = r[0].r_addend;
10979 }
10980 else
10981 {
10982 r[1].r_offset = r[0].r_offset + 8 + 8 * use_fake_dep;
10983 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10984 r[1].r_addend = r[0].r_addend + 8 + 8 * plt_static_chain;
10985 if (plt_static_chain)
10986 {
10987 r[2].r_offset = r[1].r_offset + 4;
10988 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10989 r[2].r_addend = r[0].r_addend + 8;
10990 }
10991 }
10992 }
10993 }
10994 if (ALWAYS_EMIT_R2SAVE
10995 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10996 bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p), p += 4;
10997 bfd_put_32 (obfd, LD_R12_0R2 | PPC_LO (offset), p), p += 4;
10998 if (plt_load_toc
10999 && PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
11000 {
11001 bfd_put_32 (obfd, ADDI_R2_R2 | PPC_LO (offset), p), p += 4;
11002 offset = 0;
11003 }
11004 bfd_put_32 (obfd, MTCTR_R12, p), p += 4;
11005 if (plt_load_toc)
11006 {
11007 if (use_fake_dep)
11008 {
11009 bfd_put_32 (obfd, XOR_R11_R12_R12, p), p += 4;
11010 bfd_put_32 (obfd, ADD_R2_R2_R11, p), p += 4;
11011 }
11012 if (plt_static_chain)
11013 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset + 16), p), p += 4;
11014 bfd_put_32 (obfd, LD_R2_0R2 | PPC_LO (offset + 8), p), p += 4;
11015 }
11016 }
11017 if (plt_load_toc && plt_thread_safe && !use_fake_dep)
11018 {
11019 bfd_put_32 (obfd, CMPLDI_R2_0, p), p += 4;
11020 bfd_put_32 (obfd, BNECTR_P4, p), p += 4;
11021 bfd_put_32 (obfd, B_DOT | (cmp_branch_off & 0x3fffffc), p), p += 4;
11022 }
11023 else
11024 bfd_put_32 (obfd, BCTR, p), p += 4;
11025 return p;
11026 }
11027
11028 /* Build a special .plt call stub for __tls_get_addr. */
11029
11030 #define LD_R11_0R3 0xe9630000
11031 #define LD_R12_0R3 0xe9830000
11032 #define MR_R0_R3 0x7c601b78
11033 #define CMPDI_R11_0 0x2c2b0000
11034 #define ADD_R3_R12_R13 0x7c6c6a14
11035 #define BEQLR 0x4d820020
11036 #define MR_R3_R0 0x7c030378
11037 #define STD_R11_0R1 0xf9610000
11038 #define BCTRL 0x4e800421
11039 #define LD_R11_0R1 0xe9610000
11040 #define MTLR_R11 0x7d6803a6
11041
11042 static inline bfd_byte *
11043 build_tls_get_addr_stub (struct ppc_link_hash_table *htab,
11044 struct ppc_stub_hash_entry *stub_entry,
11045 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
11046 {
11047 bfd *obfd = htab->params->stub_bfd;
11048
11049 bfd_put_32 (obfd, LD_R11_0R3 + 0, p), p += 4;
11050 bfd_put_32 (obfd, LD_R12_0R3 + 8, p), p += 4;
11051 bfd_put_32 (obfd, MR_R0_R3, p), p += 4;
11052 bfd_put_32 (obfd, CMPDI_R11_0, p), p += 4;
11053 bfd_put_32 (obfd, ADD_R3_R12_R13, p), p += 4;
11054 bfd_put_32 (obfd, BEQLR, p), p += 4;
11055 bfd_put_32 (obfd, MR_R3_R0, p), p += 4;
11056 if (r != NULL)
11057 r[0].r_offset += 7 * 4;
11058 if (!ALWAYS_EMIT_R2SAVE
11059 && stub_entry->stub_type != ppc_stub_plt_call_r2save)
11060 return build_plt_stub (htab, stub_entry, p, offset, r);
11061
11062 bfd_put_32 (obfd, MFLR_R11, p), p += 4;
11063 bfd_put_32 (obfd, STD_R11_0R1 + STK_LINKER (htab), p), p += 4;
11064
11065 if (r != NULL)
11066 r[0].r_offset += 2 * 4;
11067 p = build_plt_stub (htab, stub_entry, p, offset, r);
11068 bfd_put_32 (obfd, BCTRL, p - 4);
11069
11070 bfd_put_32 (obfd, LD_R2_0R1 + STK_TOC (htab), p), p += 4;
11071 bfd_put_32 (obfd, LD_R11_0R1 + STK_LINKER (htab), p), p += 4;
11072 bfd_put_32 (obfd, MTLR_R11, p), p += 4;
11073 bfd_put_32 (obfd, BLR, p), p += 4;
11074
11075 return p;
11076 }
11077
11078 static Elf_Internal_Rela *
11079 get_relocs (asection *sec, int count)
11080 {
11081 Elf_Internal_Rela *relocs;
11082 struct bfd_elf_section_data *elfsec_data;
11083
11084 elfsec_data = elf_section_data (sec);
11085 relocs = elfsec_data->relocs;
11086 if (relocs == NULL)
11087 {
11088 bfd_size_type relsize;
11089 relsize = sec->reloc_count * sizeof (*relocs);
11090 relocs = bfd_alloc (sec->owner, relsize);
11091 if (relocs == NULL)
11092 return NULL;
11093 elfsec_data->relocs = relocs;
11094 elfsec_data->rela.hdr = bfd_zalloc (sec->owner,
11095 sizeof (Elf_Internal_Shdr));
11096 if (elfsec_data->rela.hdr == NULL)
11097 return NULL;
11098 elfsec_data->rela.hdr->sh_size = (sec->reloc_count
11099 * sizeof (Elf64_External_Rela));
11100 elfsec_data->rela.hdr->sh_entsize = sizeof (Elf64_External_Rela);
11101 sec->reloc_count = 0;
11102 }
11103 relocs += sec->reloc_count;
11104 sec->reloc_count += count;
11105 return relocs;
11106 }
11107
11108 static bfd_vma
11109 get_r2off (struct bfd_link_info *info,
11110 struct ppc_stub_hash_entry *stub_entry)
11111 {
11112 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11113 bfd_vma r2off = htab->sec_info[stub_entry->target_section->id].toc_off;
11114
11115 if (r2off == 0)
11116 {
11117 /* Support linking -R objects. Get the toc pointer from the
11118 opd entry. */
11119 char buf[8];
11120 if (!htab->opd_abi)
11121 return r2off;
11122 asection *opd = stub_entry->h->elf.root.u.def.section;
11123 bfd_vma opd_off = stub_entry->h->elf.root.u.def.value;
11124
11125 if (strcmp (opd->name, ".opd") != 0
11126 || opd->reloc_count != 0)
11127 {
11128 info->callbacks->einfo (_("%P: cannot find opd entry toc for `%pT'\n"),
11129 stub_entry->h->elf.root.root.string);
11130 bfd_set_error (bfd_error_bad_value);
11131 return (bfd_vma) -1;
11132 }
11133 if (!bfd_get_section_contents (opd->owner, opd, buf, opd_off + 8, 8))
11134 return (bfd_vma) -1;
11135 r2off = bfd_get_64 (opd->owner, buf);
11136 r2off -= elf_gp (info->output_bfd);
11137 }
11138 r2off -= htab->sec_info[stub_entry->group->link_sec->id].toc_off;
11139 return r2off;
11140 }
11141
11142 static bfd_boolean
11143 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
11144 {
11145 struct ppc_stub_hash_entry *stub_entry;
11146 struct ppc_branch_hash_entry *br_entry;
11147 struct bfd_link_info *info;
11148 struct ppc_link_hash_table *htab;
11149 bfd_byte *loc;
11150 bfd_byte *p;
11151 bfd_vma dest, off;
11152 Elf_Internal_Rela *r;
11153 asection *plt;
11154
11155 /* Massage our args to the form they really have. */
11156 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
11157 info = in_arg;
11158
11159 htab = ppc_hash_table (info);
11160 if (htab == NULL)
11161 return FALSE;
11162
11163 /* Make a note of the offset within the stubs for this entry. */
11164 stub_entry->stub_offset = stub_entry->group->stub_sec->size;
11165 loc = stub_entry->group->stub_sec->contents + stub_entry->stub_offset;
11166
11167 htab->stub_count[stub_entry->stub_type - 1] += 1;
11168 switch (stub_entry->stub_type)
11169 {
11170 case ppc_stub_long_branch:
11171 case ppc_stub_long_branch_r2off:
11172 /* Branches are relative. This is where we are going to. */
11173 dest = (stub_entry->target_value
11174 + stub_entry->target_section->output_offset
11175 + stub_entry->target_section->output_section->vma);
11176 dest += PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
11177 off = dest;
11178
11179 /* And this is where we are coming from. */
11180 off -= (stub_entry->stub_offset
11181 + stub_entry->group->stub_sec->output_offset
11182 + stub_entry->group->stub_sec->output_section->vma);
11183
11184 p = loc;
11185 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
11186 {
11187 bfd_vma r2off = get_r2off (info, stub_entry);
11188
11189 if (r2off == (bfd_vma) -1)
11190 {
11191 htab->stub_error = TRUE;
11192 return FALSE;
11193 }
11194 bfd_put_32 (htab->params->stub_bfd, STD_R2_0R1 + STK_TOC (htab), p);
11195 p += 4;
11196 if (PPC_HA (r2off) != 0)
11197 {
11198 bfd_put_32 (htab->params->stub_bfd,
11199 ADDIS_R2_R2 | PPC_HA (r2off), p);
11200 p += 4;
11201 }
11202 if (PPC_LO (r2off) != 0)
11203 {
11204 bfd_put_32 (htab->params->stub_bfd,
11205 ADDI_R2_R2 | PPC_LO (r2off), p);
11206 p += 4;
11207 }
11208 off -= p - loc;
11209 }
11210 bfd_put_32 (htab->params->stub_bfd, B_DOT | (off & 0x3fffffc), p);
11211 p += 4;
11212
11213 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
11214 {
11215 _bfd_error_handler
11216 (_("long branch stub `%s' offset overflow"),
11217 stub_entry->root.string);
11218 htab->stub_error = TRUE;
11219 return FALSE;
11220 }
11221
11222 if (info->emitrelocations)
11223 {
11224 r = get_relocs (stub_entry->group->stub_sec, 1);
11225 if (r == NULL)
11226 return FALSE;
11227 r->r_offset = p - 4 - stub_entry->group->stub_sec->contents;
11228 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
11229 r->r_addend = dest;
11230 if (stub_entry->h != NULL)
11231 {
11232 struct elf_link_hash_entry **hashes;
11233 unsigned long symndx;
11234 struct ppc_link_hash_entry *h;
11235
11236 hashes = elf_sym_hashes (htab->params->stub_bfd);
11237 if (hashes == NULL)
11238 {
11239 bfd_size_type hsize;
11240
11241 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
11242 hashes = bfd_zalloc (htab->params->stub_bfd, hsize);
11243 if (hashes == NULL)
11244 return FALSE;
11245 elf_sym_hashes (htab->params->stub_bfd) = hashes;
11246 htab->stub_globals = 1;
11247 }
11248 symndx = htab->stub_globals++;
11249 h = stub_entry->h;
11250 hashes[symndx] = &h->elf;
11251 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
11252 if (h->oh != NULL && h->oh->is_func)
11253 h = ppc_follow_link (h->oh);
11254 if (h->elf.root.u.def.section != stub_entry->target_section)
11255 /* H is an opd symbol. The addend must be zero. */
11256 r->r_addend = 0;
11257 else
11258 {
11259 off = (h->elf.root.u.def.value
11260 + h->elf.root.u.def.section->output_offset
11261 + h->elf.root.u.def.section->output_section->vma);
11262 r->r_addend -= off;
11263 }
11264 }
11265 }
11266 break;
11267
11268 case ppc_stub_plt_branch:
11269 case ppc_stub_plt_branch_r2off:
11270 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
11271 stub_entry->root.string + 9,
11272 FALSE, FALSE);
11273 if (br_entry == NULL)
11274 {
11275 _bfd_error_handler (_("can't find branch stub `%s'"),
11276 stub_entry->root.string);
11277 htab->stub_error = TRUE;
11278 return FALSE;
11279 }
11280
11281 dest = (stub_entry->target_value
11282 + stub_entry->target_section->output_offset
11283 + stub_entry->target_section->output_section->vma);
11284 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
11285 dest += PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
11286
11287 bfd_put_64 (htab->brlt->owner, dest,
11288 htab->brlt->contents + br_entry->offset);
11289
11290 if (br_entry->iter == htab->stub_iteration)
11291 {
11292 br_entry->iter = 0;
11293
11294 if (htab->relbrlt != NULL)
11295 {
11296 /* Create a reloc for the branch lookup table entry. */
11297 Elf_Internal_Rela rela;
11298 bfd_byte *rl;
11299
11300 rela.r_offset = (br_entry->offset
11301 + htab->brlt->output_offset
11302 + htab->brlt->output_section->vma);
11303 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
11304 rela.r_addend = dest;
11305
11306 rl = htab->relbrlt->contents;
11307 rl += (htab->relbrlt->reloc_count++
11308 * sizeof (Elf64_External_Rela));
11309 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
11310 }
11311 else if (info->emitrelocations)
11312 {
11313 r = get_relocs (htab->brlt, 1);
11314 if (r == NULL)
11315 return FALSE;
11316 /* brlt, being SEC_LINKER_CREATED does not go through the
11317 normal reloc processing. Symbols and offsets are not
11318 translated from input file to output file form, so
11319 set up the offset per the output file. */
11320 r->r_offset = (br_entry->offset
11321 + htab->brlt->output_offset
11322 + htab->brlt->output_section->vma);
11323 r->r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
11324 r->r_addend = dest;
11325 }
11326 }
11327
11328 dest = (br_entry->offset
11329 + htab->brlt->output_offset
11330 + htab->brlt->output_section->vma);
11331
11332 off = (dest
11333 - elf_gp (info->output_bfd)
11334 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11335
11336 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
11337 {
11338 info->callbacks->einfo
11339 (_("%P: linkage table error against `%pT'\n"),
11340 stub_entry->root.string);
11341 bfd_set_error (bfd_error_bad_value);
11342 htab->stub_error = TRUE;
11343 return FALSE;
11344 }
11345
11346 if (info->emitrelocations)
11347 {
11348 r = get_relocs (stub_entry->group->stub_sec, 1 + (PPC_HA (off) != 0));
11349 if (r == NULL)
11350 return FALSE;
11351 r[0].r_offset = loc - stub_entry->group->stub_sec->contents;
11352 if (bfd_big_endian (info->output_bfd))
11353 r[0].r_offset += 2;
11354 if (stub_entry->stub_type == ppc_stub_plt_branch_r2off)
11355 r[0].r_offset += 4;
11356 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
11357 r[0].r_addend = dest;
11358 if (PPC_HA (off) != 0)
11359 {
11360 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
11361 r[1].r_offset = r[0].r_offset + 4;
11362 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
11363 r[1].r_addend = r[0].r_addend;
11364 }
11365 }
11366
11367 p = loc;
11368 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
11369 {
11370 if (PPC_HA (off) != 0)
11371 {
11372 bfd_put_32 (htab->params->stub_bfd,
11373 ADDIS_R12_R2 | PPC_HA (off), p);
11374 p += 4;
11375 bfd_put_32 (htab->params->stub_bfd,
11376 LD_R12_0R12 | PPC_LO (off), p);
11377 }
11378 else
11379 bfd_put_32 (htab->params->stub_bfd,
11380 LD_R12_0R2 | PPC_LO (off), p);
11381 }
11382 else
11383 {
11384 bfd_vma r2off = get_r2off (info, stub_entry);
11385
11386 if (r2off == (bfd_vma) -1)
11387 {
11388 htab->stub_error = TRUE;
11389 return FALSE;
11390 }
11391
11392 bfd_put_32 (htab->params->stub_bfd, STD_R2_0R1 + STK_TOC (htab), p);
11393 p += 4;
11394 if (PPC_HA (off) != 0)
11395 {
11396 bfd_put_32 (htab->params->stub_bfd,
11397 ADDIS_R12_R2 | PPC_HA (off), p);
11398 p += 4;
11399 bfd_put_32 (htab->params->stub_bfd,
11400 LD_R12_0R12 | PPC_LO (off), p);
11401 }
11402 else
11403 bfd_put_32 (htab->params->stub_bfd, LD_R12_0R2 | PPC_LO (off), p);
11404
11405 if (PPC_HA (r2off) != 0)
11406 {
11407 p += 4;
11408 bfd_put_32 (htab->params->stub_bfd,
11409 ADDIS_R2_R2 | PPC_HA (r2off), p);
11410 }
11411 if (PPC_LO (r2off) != 0)
11412 {
11413 p += 4;
11414 bfd_put_32 (htab->params->stub_bfd,
11415 ADDI_R2_R2 | PPC_LO (r2off), p);
11416 }
11417 }
11418 p += 4;
11419 bfd_put_32 (htab->params->stub_bfd, MTCTR_R12, p);
11420 p += 4;
11421 bfd_put_32 (htab->params->stub_bfd, BCTR, p);
11422 p += 4;
11423 break;
11424
11425 case ppc_stub_plt_call:
11426 case ppc_stub_plt_call_r2save:
11427 if (stub_entry->h != NULL
11428 && stub_entry->h->is_func_descriptor
11429 && stub_entry->h->oh != NULL)
11430 {
11431 struct ppc_link_hash_entry *fh = ppc_follow_link (stub_entry->h->oh);
11432
11433 /* If the old-ABI "dot-symbol" is undefined make it weak so
11434 we don't get a link error from RELOC_FOR_GLOBAL_SYMBOL. */
11435 if (fh->elf.root.type == bfd_link_hash_undefined
11436 && (stub_entry->h->elf.root.type == bfd_link_hash_defined
11437 || stub_entry->h->elf.root.type == bfd_link_hash_defweak))
11438 fh->elf.root.type = bfd_link_hash_undefweak;
11439 }
11440
11441 /* Now build the stub. */
11442 dest = stub_entry->plt_ent->plt.offset & ~1;
11443 if (dest >= (bfd_vma) -2)
11444 abort ();
11445
11446 plt = htab->elf.splt;
11447 if (!htab->elf.dynamic_sections_created
11448 || stub_entry->h == NULL
11449 || stub_entry->h->elf.dynindx == -1)
11450 {
11451 if (stub_entry->symtype == STT_GNU_IFUNC)
11452 plt = htab->elf.iplt;
11453 else
11454 plt = htab->pltlocal;
11455 }
11456
11457 dest += plt->output_offset + plt->output_section->vma;
11458
11459 off = (dest
11460 - elf_gp (info->output_bfd)
11461 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11462
11463 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
11464 {
11465 info->callbacks->einfo
11466 /* xgettext:c-format */
11467 (_("%P: linkage table error against `%pT'\n"),
11468 stub_entry->h != NULL
11469 ? stub_entry->h->elf.root.root.string
11470 : "<local sym>");
11471 bfd_set_error (bfd_error_bad_value);
11472 htab->stub_error = TRUE;
11473 return FALSE;
11474 }
11475
11476 if (htab->params->plt_stub_align != 0)
11477 {
11478 unsigned pad = plt_stub_pad (htab, stub_entry, off);
11479
11480 stub_entry->group->stub_sec->size += pad;
11481 stub_entry->stub_offset = stub_entry->group->stub_sec->size;
11482 loc += pad;
11483 }
11484
11485 r = NULL;
11486 if (info->emitrelocations)
11487 {
11488 r = get_relocs (stub_entry->group->stub_sec,
11489 ((PPC_HA (off) != 0)
11490 + (htab->opd_abi
11491 ? 2 + (htab->params->plt_static_chain
11492 && PPC_HA (off + 16) == PPC_HA (off))
11493 : 1)));
11494 if (r == NULL)
11495 return FALSE;
11496 r[0].r_offset = loc - stub_entry->group->stub_sec->contents;
11497 if (bfd_big_endian (info->output_bfd))
11498 r[0].r_offset += 2;
11499 r[0].r_addend = dest;
11500 }
11501 if (stub_entry->h != NULL
11502 && (stub_entry->h == htab->tls_get_addr_fd
11503 || stub_entry->h == htab->tls_get_addr)
11504 && htab->params->tls_get_addr_opt)
11505 p = build_tls_get_addr_stub (htab, stub_entry, loc, off, r);
11506 else
11507 p = build_plt_stub (htab, stub_entry, loc, off, r);
11508 break;
11509
11510 case ppc_stub_save_res:
11511 return TRUE;
11512
11513 default:
11514 BFD_FAIL ();
11515 return FALSE;
11516 }
11517
11518 stub_entry->group->stub_sec->size += p - loc;
11519
11520 if (htab->params->emit_stub_syms)
11521 {
11522 struct elf_link_hash_entry *h;
11523 size_t len1, len2;
11524 char *name;
11525 const char *const stub_str[] = { "long_branch",
11526 "long_branch_r2off",
11527 "plt_branch",
11528 "plt_branch_r2off",
11529 "plt_call",
11530 "plt_call" };
11531
11532 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
11533 len2 = strlen (stub_entry->root.string);
11534 name = bfd_malloc (len1 + len2 + 2);
11535 if (name == NULL)
11536 return FALSE;
11537 memcpy (name, stub_entry->root.string, 9);
11538 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
11539 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
11540 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
11541 if (h == NULL)
11542 return FALSE;
11543 if (h->root.type == bfd_link_hash_new)
11544 {
11545 h->root.type = bfd_link_hash_defined;
11546 h->root.u.def.section = stub_entry->group->stub_sec;
11547 h->root.u.def.value = stub_entry->stub_offset;
11548 h->ref_regular = 1;
11549 h->def_regular = 1;
11550 h->ref_regular_nonweak = 1;
11551 h->forced_local = 1;
11552 h->non_elf = 0;
11553 h->root.linker_def = 1;
11554 }
11555 }
11556
11557 return TRUE;
11558 }
11559
11560 /* As above, but don't actually build the stub. Just bump offset so
11561 we know stub section sizes, and select plt_branch stubs where
11562 long_branch stubs won't do. */
11563
11564 static bfd_boolean
11565 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
11566 {
11567 struct ppc_stub_hash_entry *stub_entry;
11568 struct bfd_link_info *info;
11569 struct ppc_link_hash_table *htab;
11570 bfd_vma off;
11571 int size;
11572
11573 /* Massage our args to the form they really have. */
11574 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
11575 info = in_arg;
11576
11577 htab = ppc_hash_table (info);
11578 if (htab == NULL)
11579 return FALSE;
11580
11581 if (stub_entry->h != NULL
11582 && stub_entry->h->save_res
11583 && stub_entry->h->elf.root.type == bfd_link_hash_defined
11584 && stub_entry->h->elf.root.u.def.section == htab->sfpr)
11585 {
11586 /* Don't make stubs to out-of-line register save/restore
11587 functions. Instead, emit copies of the functions. */
11588 stub_entry->group->needs_save_res = 1;
11589 stub_entry->stub_type = ppc_stub_save_res;
11590 return TRUE;
11591 }
11592
11593 if (stub_entry->stub_type == ppc_stub_plt_call
11594 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
11595 {
11596 asection *plt;
11597 off = stub_entry->plt_ent->plt.offset & ~(bfd_vma) 1;
11598 if (off >= (bfd_vma) -2)
11599 abort ();
11600 plt = htab->elf.splt;
11601 if (!htab->elf.dynamic_sections_created
11602 || stub_entry->h == NULL
11603 || stub_entry->h->elf.dynindx == -1)
11604 {
11605 if (stub_entry->symtype == STT_GNU_IFUNC)
11606 plt = htab->elf.iplt;
11607 else
11608 plt = htab->pltlocal;
11609 }
11610 off += (plt->output_offset
11611 + plt->output_section->vma
11612 - elf_gp (info->output_bfd)
11613 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11614
11615 size = plt_stub_size (htab, stub_entry, off);
11616 if (stub_entry->h != NULL
11617 && (stub_entry->h == htab->tls_get_addr_fd
11618 || stub_entry->h == htab->tls_get_addr)
11619 && htab->params->tls_get_addr_opt
11620 && (ALWAYS_EMIT_R2SAVE
11621 || stub_entry->stub_type == ppc_stub_plt_call_r2save))
11622 stub_entry->group->tls_get_addr_opt_bctrl
11623 = stub_entry->group->stub_sec->size + size - 5 * 4;
11624
11625 if (htab->params->plt_stub_align)
11626 size += plt_stub_pad (htab, stub_entry, off);
11627 if (info->emitrelocations)
11628 {
11629 stub_entry->group->stub_sec->reloc_count
11630 += ((PPC_HA (off) != 0)
11631 + (htab->opd_abi
11632 ? 2 + (htab->params->plt_static_chain
11633 && PPC_HA (off + 16) == PPC_HA (off))
11634 : 1));
11635 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11636 }
11637 }
11638 else
11639 {
11640 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
11641 variants. */
11642 bfd_vma r2off = 0;
11643 bfd_vma local_off = 0;
11644
11645 off = (stub_entry->target_value
11646 + stub_entry->target_section->output_offset
11647 + stub_entry->target_section->output_section->vma);
11648 off -= (stub_entry->group->stub_sec->size
11649 + stub_entry->group->stub_sec->output_offset
11650 + stub_entry->group->stub_sec->output_section->vma);
11651
11652 /* Reset the stub type from the plt variant in case we now
11653 can reach with a shorter stub. */
11654 if (stub_entry->stub_type >= ppc_stub_plt_branch)
11655 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
11656
11657 size = 4;
11658 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
11659 {
11660 r2off = get_r2off (info, stub_entry);
11661 if (r2off == (bfd_vma) -1)
11662 {
11663 htab->stub_error = TRUE;
11664 return FALSE;
11665 }
11666 size = 8;
11667 if (PPC_HA (r2off) != 0)
11668 size += 4;
11669 if (PPC_LO (r2off) != 0)
11670 size += 4;
11671 off -= size - 4;
11672 }
11673
11674 local_off = PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
11675
11676 /* If the branch offset is too big, use a ppc_stub_plt_branch.
11677 Do the same for -R objects without function descriptors. */
11678 if (off + (1 << 25) >= (bfd_vma) (1 << 26) - local_off
11679 || (stub_entry->stub_type == ppc_stub_long_branch_r2off
11680 && r2off == 0
11681 && htab->sec_info[stub_entry->target_section->id].toc_off == 0))
11682 {
11683 struct ppc_branch_hash_entry *br_entry;
11684
11685 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
11686 stub_entry->root.string + 9,
11687 TRUE, FALSE);
11688 if (br_entry == NULL)
11689 {
11690 _bfd_error_handler (_("can't build branch stub `%s'"),
11691 stub_entry->root.string);
11692 htab->stub_error = TRUE;
11693 return FALSE;
11694 }
11695
11696 if (br_entry->iter != htab->stub_iteration)
11697 {
11698 br_entry->iter = htab->stub_iteration;
11699 br_entry->offset = htab->brlt->size;
11700 htab->brlt->size += 8;
11701
11702 if (htab->relbrlt != NULL)
11703 htab->relbrlt->size += sizeof (Elf64_External_Rela);
11704 else if (info->emitrelocations)
11705 {
11706 htab->brlt->reloc_count += 1;
11707 htab->brlt->flags |= SEC_RELOC;
11708 }
11709 }
11710
11711 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
11712 off = (br_entry->offset
11713 + htab->brlt->output_offset
11714 + htab->brlt->output_section->vma
11715 - elf_gp (info->output_bfd)
11716 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11717
11718 if (info->emitrelocations)
11719 {
11720 stub_entry->group->stub_sec->reloc_count
11721 += 1 + (PPC_HA (off) != 0);
11722 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11723 }
11724
11725 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
11726 {
11727 size = 12;
11728 if (PPC_HA (off) != 0)
11729 size = 16;
11730 }
11731 else
11732 {
11733 size = 16;
11734 if (PPC_HA (off) != 0)
11735 size += 4;
11736
11737 if (PPC_HA (r2off) != 0)
11738 size += 4;
11739 if (PPC_LO (r2off) != 0)
11740 size += 4;
11741 }
11742 }
11743 else if (info->emitrelocations)
11744 {
11745 stub_entry->group->stub_sec->reloc_count += 1;
11746 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11747 }
11748 }
11749
11750 stub_entry->group->stub_sec->size += size;
11751 return TRUE;
11752 }
11753
11754 /* Set up various things so that we can make a list of input sections
11755 for each output section included in the link. Returns -1 on error,
11756 0 when no stubs will be needed, and 1 on success. */
11757
11758 int
11759 ppc64_elf_setup_section_lists (struct bfd_link_info *info)
11760 {
11761 unsigned int id;
11762 bfd_size_type amt;
11763 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11764
11765 if (htab == NULL)
11766 return -1;
11767
11768 htab->sec_info_arr_size = _bfd_section_id;
11769 amt = sizeof (*htab->sec_info) * (htab->sec_info_arr_size);
11770 htab->sec_info = bfd_zmalloc (amt);
11771 if (htab->sec_info == NULL)
11772 return -1;
11773
11774 /* Set toc_off for com, und, abs and ind sections. */
11775 for (id = 0; id < 3; id++)
11776 htab->sec_info[id].toc_off = TOC_BASE_OFF;
11777
11778 return 1;
11779 }
11780
11781 /* Set up for first pass at multitoc partitioning. */
11782
11783 void
11784 ppc64_elf_start_multitoc_partition (struct bfd_link_info *info)
11785 {
11786 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11787
11788 htab->toc_curr = ppc64_elf_set_toc (info, info->output_bfd);
11789 htab->toc_bfd = NULL;
11790 htab->toc_first_sec = NULL;
11791 }
11792
11793 /* The linker repeatedly calls this function for each TOC input section
11794 and linker generated GOT section. Group input bfds such that the toc
11795 within a group is less than 64k in size. */
11796
11797 bfd_boolean
11798 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
11799 {
11800 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11801 bfd_vma addr, off, limit;
11802
11803 if (htab == NULL)
11804 return FALSE;
11805
11806 if (!htab->second_toc_pass)
11807 {
11808 /* Keep track of the first .toc or .got section for this input bfd. */
11809 bfd_boolean new_bfd = htab->toc_bfd != isec->owner;
11810
11811 if (new_bfd)
11812 {
11813 htab->toc_bfd = isec->owner;
11814 htab->toc_first_sec = isec;
11815 }
11816
11817 addr = isec->output_offset + isec->output_section->vma;
11818 off = addr - htab->toc_curr;
11819 limit = 0x80008000;
11820 if (ppc64_elf_tdata (isec->owner)->has_small_toc_reloc)
11821 limit = 0x10000;
11822 if (off + isec->size > limit)
11823 {
11824 addr = (htab->toc_first_sec->output_offset
11825 + htab->toc_first_sec->output_section->vma);
11826 htab->toc_curr = addr;
11827 htab->toc_curr &= -TOC_BASE_ALIGN;
11828 }
11829
11830 /* toc_curr is the base address of this toc group. Set elf_gp
11831 for the input section to be the offset relative to the
11832 output toc base plus 0x8000. Making the input elf_gp an
11833 offset allows us to move the toc as a whole without
11834 recalculating input elf_gp. */
11835 off = htab->toc_curr - elf_gp (info->output_bfd);
11836 off += TOC_BASE_OFF;
11837
11838 /* Die if someone uses a linker script that doesn't keep input
11839 file .toc and .got together. */
11840 if (new_bfd
11841 && elf_gp (isec->owner) != 0
11842 && elf_gp (isec->owner) != off)
11843 return FALSE;
11844
11845 elf_gp (isec->owner) = off;
11846 return TRUE;
11847 }
11848
11849 /* During the second pass toc_first_sec points to the start of
11850 a toc group, and toc_curr is used to track the old elf_gp.
11851 We use toc_bfd to ensure we only look at each bfd once. */
11852 if (htab->toc_bfd == isec->owner)
11853 return TRUE;
11854 htab->toc_bfd = isec->owner;
11855
11856 if (htab->toc_first_sec == NULL
11857 || htab->toc_curr != elf_gp (isec->owner))
11858 {
11859 htab->toc_curr = elf_gp (isec->owner);
11860 htab->toc_first_sec = isec;
11861 }
11862 addr = (htab->toc_first_sec->output_offset
11863 + htab->toc_first_sec->output_section->vma);
11864 off = addr - elf_gp (info->output_bfd) + TOC_BASE_OFF;
11865 elf_gp (isec->owner) = off;
11866
11867 return TRUE;
11868 }
11869
11870 /* Called via elf_link_hash_traverse to merge GOT entries for global
11871 symbol H. */
11872
11873 static bfd_boolean
11874 merge_global_got (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
11875 {
11876 if (h->root.type == bfd_link_hash_indirect)
11877 return TRUE;
11878
11879 merge_got_entries (&h->got.glist);
11880
11881 return TRUE;
11882 }
11883
11884 /* Called via elf_link_hash_traverse to allocate GOT entries for global
11885 symbol H. */
11886
11887 static bfd_boolean
11888 reallocate_got (struct elf_link_hash_entry *h, void *inf)
11889 {
11890 struct got_entry *gent;
11891
11892 if (h->root.type == bfd_link_hash_indirect)
11893 return TRUE;
11894
11895 for (gent = h->got.glist; gent != NULL; gent = gent->next)
11896 if (!gent->is_indirect)
11897 allocate_got (h, (struct bfd_link_info *) inf, gent);
11898 return TRUE;
11899 }
11900
11901 /* Called on the first multitoc pass after the last call to
11902 ppc64_elf_next_toc_section. This function removes duplicate GOT
11903 entries. */
11904
11905 bfd_boolean
11906 ppc64_elf_layout_multitoc (struct bfd_link_info *info)
11907 {
11908 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11909 struct bfd *ibfd, *ibfd2;
11910 bfd_boolean done_something;
11911
11912 htab->multi_toc_needed = htab->toc_curr != elf_gp (info->output_bfd);
11913
11914 if (!htab->do_multi_toc)
11915 return FALSE;
11916
11917 /* Merge global sym got entries within a toc group. */
11918 elf_link_hash_traverse (&htab->elf, merge_global_got, info);
11919
11920 /* And tlsld_got. */
11921 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11922 {
11923 struct got_entry *ent, *ent2;
11924
11925 if (!is_ppc64_elf (ibfd))
11926 continue;
11927
11928 ent = ppc64_tlsld_got (ibfd);
11929 if (!ent->is_indirect
11930 && ent->got.offset != (bfd_vma) -1)
11931 {
11932 for (ibfd2 = ibfd->link.next; ibfd2 != NULL; ibfd2 = ibfd2->link.next)
11933 {
11934 if (!is_ppc64_elf (ibfd2))
11935 continue;
11936
11937 ent2 = ppc64_tlsld_got (ibfd2);
11938 if (!ent2->is_indirect
11939 && ent2->got.offset != (bfd_vma) -1
11940 && elf_gp (ibfd2) == elf_gp (ibfd))
11941 {
11942 ent2->is_indirect = TRUE;
11943 ent2->got.ent = ent;
11944 }
11945 }
11946 }
11947 }
11948
11949 /* Zap sizes of got sections. */
11950 htab->elf.irelplt->rawsize = htab->elf.irelplt->size;
11951 htab->elf.irelplt->size -= htab->got_reli_size;
11952 htab->got_reli_size = 0;
11953
11954 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11955 {
11956 asection *got, *relgot;
11957
11958 if (!is_ppc64_elf (ibfd))
11959 continue;
11960
11961 got = ppc64_elf_tdata (ibfd)->got;
11962 if (got != NULL)
11963 {
11964 got->rawsize = got->size;
11965 got->size = 0;
11966 relgot = ppc64_elf_tdata (ibfd)->relgot;
11967 relgot->rawsize = relgot->size;
11968 relgot->size = 0;
11969 }
11970 }
11971
11972 /* Now reallocate the got, local syms first. We don't need to
11973 allocate section contents again since we never increase size. */
11974 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11975 {
11976 struct got_entry **lgot_ents;
11977 struct got_entry **end_lgot_ents;
11978 struct plt_entry **local_plt;
11979 struct plt_entry **end_local_plt;
11980 unsigned char *lgot_masks;
11981 bfd_size_type locsymcount;
11982 Elf_Internal_Shdr *symtab_hdr;
11983 asection *s;
11984
11985 if (!is_ppc64_elf (ibfd))
11986 continue;
11987
11988 lgot_ents = elf_local_got_ents (ibfd);
11989 if (!lgot_ents)
11990 continue;
11991
11992 symtab_hdr = &elf_symtab_hdr (ibfd);
11993 locsymcount = symtab_hdr->sh_info;
11994 end_lgot_ents = lgot_ents + locsymcount;
11995 local_plt = (struct plt_entry **) end_lgot_ents;
11996 end_local_plt = local_plt + locsymcount;
11997 lgot_masks = (unsigned char *) end_local_plt;
11998 s = ppc64_elf_tdata (ibfd)->got;
11999 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
12000 {
12001 struct got_entry *ent;
12002
12003 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
12004 {
12005 unsigned int ent_size = 8;
12006 unsigned int rel_size = sizeof (Elf64_External_Rela);
12007
12008 ent->got.offset = s->size;
12009 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
12010 {
12011 ent_size *= 2;
12012 rel_size *= 2;
12013 }
12014 s->size += ent_size;
12015 if ((*lgot_masks & (TLS_TLS | PLT_IFUNC)) == PLT_IFUNC)
12016 {
12017 htab->elf.irelplt->size += rel_size;
12018 htab->got_reli_size += rel_size;
12019 }
12020 else if (bfd_link_pic (info)
12021 && !((ent->tls_type & TLS_TPREL) != 0
12022 && bfd_link_executable (info)))
12023 {
12024 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
12025 srel->size += rel_size;
12026 }
12027 }
12028 }
12029 }
12030
12031 elf_link_hash_traverse (&htab->elf, reallocate_got, info);
12032
12033 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
12034 {
12035 struct got_entry *ent;
12036
12037 if (!is_ppc64_elf (ibfd))
12038 continue;
12039
12040 ent = ppc64_tlsld_got (ibfd);
12041 if (!ent->is_indirect
12042 && ent->got.offset != (bfd_vma) -1)
12043 {
12044 asection *s = ppc64_elf_tdata (ibfd)->got;
12045 ent->got.offset = s->size;
12046 s->size += 16;
12047 if (bfd_link_pic (info))
12048 {
12049 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
12050 srel->size += sizeof (Elf64_External_Rela);
12051 }
12052 }
12053 }
12054
12055 done_something = htab->elf.irelplt->rawsize != htab->elf.irelplt->size;
12056 if (!done_something)
12057 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
12058 {
12059 asection *got;
12060
12061 if (!is_ppc64_elf (ibfd))
12062 continue;
12063
12064 got = ppc64_elf_tdata (ibfd)->got;
12065 if (got != NULL)
12066 {
12067 done_something = got->rawsize != got->size;
12068 if (done_something)
12069 break;
12070 }
12071 }
12072
12073 if (done_something)
12074 (*htab->params->layout_sections_again) ();
12075
12076 /* Set up for second pass over toc sections to recalculate elf_gp
12077 on input sections. */
12078 htab->toc_bfd = NULL;
12079 htab->toc_first_sec = NULL;
12080 htab->second_toc_pass = TRUE;
12081 return done_something;
12082 }
12083
12084 /* Called after second pass of multitoc partitioning. */
12085
12086 void
12087 ppc64_elf_finish_multitoc_partition (struct bfd_link_info *info)
12088 {
12089 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12090
12091 /* After the second pass, toc_curr tracks the TOC offset used
12092 for code sections below in ppc64_elf_next_input_section. */
12093 htab->toc_curr = TOC_BASE_OFF;
12094 }
12095
12096 /* No toc references were found in ISEC. If the code in ISEC makes no
12097 calls, then there's no need to use toc adjusting stubs when branching
12098 into ISEC. Actually, indirect calls from ISEC are OK as they will
12099 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
12100 needed, and 2 if a cyclical call-graph was found but no other reason
12101 for a stub was detected. If called from the top level, a return of
12102 2 means the same as a return of 0. */
12103
12104 static int
12105 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
12106 {
12107 int ret;
12108
12109 /* Mark this section as checked. */
12110 isec->call_check_done = 1;
12111
12112 /* We know none of our code bearing sections will need toc stubs. */
12113 if ((isec->flags & SEC_LINKER_CREATED) != 0)
12114 return 0;
12115
12116 if (isec->size == 0)
12117 return 0;
12118
12119 if (isec->output_section == NULL)
12120 return 0;
12121
12122 ret = 0;
12123 if (isec->reloc_count != 0)
12124 {
12125 Elf_Internal_Rela *relstart, *rel;
12126 Elf_Internal_Sym *local_syms;
12127 struct ppc_link_hash_table *htab;
12128
12129 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
12130 info->keep_memory);
12131 if (relstart == NULL)
12132 return -1;
12133
12134 /* Look for branches to outside of this section. */
12135 local_syms = NULL;
12136 htab = ppc_hash_table (info);
12137 if (htab == NULL)
12138 return -1;
12139
12140 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
12141 {
12142 enum elf_ppc64_reloc_type r_type;
12143 unsigned long r_symndx;
12144 struct elf_link_hash_entry *h;
12145 struct ppc_link_hash_entry *eh;
12146 Elf_Internal_Sym *sym;
12147 asection *sym_sec;
12148 struct _opd_sec_data *opd;
12149 bfd_vma sym_value;
12150 bfd_vma dest;
12151
12152 r_type = ELF64_R_TYPE (rel->r_info);
12153 if (r_type != R_PPC64_REL24
12154 && r_type != R_PPC64_REL14
12155 && r_type != R_PPC64_REL14_BRTAKEN
12156 && r_type != R_PPC64_REL14_BRNTAKEN
12157 && r_type != R_PPC64_PLTCALL)
12158 continue;
12159
12160 r_symndx = ELF64_R_SYM (rel->r_info);
12161 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
12162 isec->owner))
12163 {
12164 ret = -1;
12165 break;
12166 }
12167
12168 /* Calls to dynamic lib functions go through a plt call stub
12169 that uses r2. */
12170 eh = (struct ppc_link_hash_entry *) h;
12171 if (eh != NULL
12172 && (eh->elf.plt.plist != NULL
12173 || (eh->oh != NULL
12174 && ppc_follow_link (eh->oh)->elf.plt.plist != NULL)))
12175 {
12176 ret = 1;
12177 break;
12178 }
12179
12180 if (sym_sec == NULL)
12181 /* Ignore other undefined symbols. */
12182 continue;
12183
12184 /* Assume branches to other sections not included in the
12185 link need stubs too, to cover -R and absolute syms. */
12186 if (sym_sec->output_section == NULL)
12187 {
12188 ret = 1;
12189 break;
12190 }
12191
12192 if (h == NULL)
12193 sym_value = sym->st_value;
12194 else
12195 {
12196 if (h->root.type != bfd_link_hash_defined
12197 && h->root.type != bfd_link_hash_defweak)
12198 abort ();
12199 sym_value = h->root.u.def.value;
12200 }
12201 sym_value += rel->r_addend;
12202
12203 /* If this branch reloc uses an opd sym, find the code section. */
12204 opd = get_opd_info (sym_sec);
12205 if (opd != NULL)
12206 {
12207 if (h == NULL && opd->adjust != NULL)
12208 {
12209 long adjust;
12210
12211 adjust = opd->adjust[OPD_NDX (sym_value)];
12212 if (adjust == -1)
12213 /* Assume deleted functions won't ever be called. */
12214 continue;
12215 sym_value += adjust;
12216 }
12217
12218 dest = opd_entry_value (sym_sec, sym_value,
12219 &sym_sec, NULL, FALSE);
12220 if (dest == (bfd_vma) -1)
12221 continue;
12222 }
12223 else
12224 dest = (sym_value
12225 + sym_sec->output_offset
12226 + sym_sec->output_section->vma);
12227
12228 /* Ignore branch to self. */
12229 if (sym_sec == isec)
12230 continue;
12231
12232 /* If the called function uses the toc, we need a stub. */
12233 if (sym_sec->has_toc_reloc
12234 || sym_sec->makes_toc_func_call)
12235 {
12236 ret = 1;
12237 break;
12238 }
12239
12240 /* Assume any branch that needs a long branch stub might in fact
12241 need a plt_branch stub. A plt_branch stub uses r2. */
12242 else if (dest - (isec->output_offset
12243 + isec->output_section->vma
12244 + rel->r_offset) + (1 << 25)
12245 >= (2u << 25) - PPC64_LOCAL_ENTRY_OFFSET (h
12246 ? h->other
12247 : sym->st_other))
12248 {
12249 ret = 1;
12250 break;
12251 }
12252
12253 /* If calling back to a section in the process of being
12254 tested, we can't say for sure that no toc adjusting stubs
12255 are needed, so don't return zero. */
12256 else if (sym_sec->call_check_in_progress)
12257 ret = 2;
12258
12259 /* Branches to another section that itself doesn't have any TOC
12260 references are OK. Recursively call ourselves to check. */
12261 else if (!sym_sec->call_check_done)
12262 {
12263 int recur;
12264
12265 /* Mark current section as indeterminate, so that other
12266 sections that call back to current won't be marked as
12267 known. */
12268 isec->call_check_in_progress = 1;
12269 recur = toc_adjusting_stub_needed (info, sym_sec);
12270 isec->call_check_in_progress = 0;
12271
12272 if (recur != 0)
12273 {
12274 ret = recur;
12275 if (recur != 2)
12276 break;
12277 }
12278 }
12279 }
12280
12281 if (local_syms != NULL
12282 && (elf_symtab_hdr (isec->owner).contents
12283 != (unsigned char *) local_syms))
12284 free (local_syms);
12285 if (elf_section_data (isec)->relocs != relstart)
12286 free (relstart);
12287 }
12288
12289 if ((ret & 1) == 0
12290 && isec->map_head.s != NULL
12291 && (strcmp (isec->output_section->name, ".init") == 0
12292 || strcmp (isec->output_section->name, ".fini") == 0))
12293 {
12294 if (isec->map_head.s->has_toc_reloc
12295 || isec->map_head.s->makes_toc_func_call)
12296 ret = 1;
12297 else if (!isec->map_head.s->call_check_done)
12298 {
12299 int recur;
12300 isec->call_check_in_progress = 1;
12301 recur = toc_adjusting_stub_needed (info, isec->map_head.s);
12302 isec->call_check_in_progress = 0;
12303 if (recur != 0)
12304 ret = recur;
12305 }
12306 }
12307
12308 if (ret == 1)
12309 isec->makes_toc_func_call = 1;
12310
12311 return ret;
12312 }
12313
12314 /* The linker repeatedly calls this function for each input section,
12315 in the order that input sections are linked into output sections.
12316 Build lists of input sections to determine groupings between which
12317 we may insert linker stubs. */
12318
12319 bfd_boolean
12320 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
12321 {
12322 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12323
12324 if (htab == NULL)
12325 return FALSE;
12326
12327 if ((isec->output_section->flags & SEC_CODE) != 0
12328 && isec->output_section->id < htab->sec_info_arr_size)
12329 {
12330 /* This happens to make the list in reverse order,
12331 which is what we want. */
12332 htab->sec_info[isec->id].u.list
12333 = htab->sec_info[isec->output_section->id].u.list;
12334 htab->sec_info[isec->output_section->id].u.list = isec;
12335 }
12336
12337 if (htab->multi_toc_needed)
12338 {
12339 /* Analyse sections that aren't already flagged as needing a
12340 valid toc pointer. Exclude .fixup for the linux kernel.
12341 .fixup contains branches, but only back to the function that
12342 hit an exception. */
12343 if (!(isec->has_toc_reloc
12344 || (isec->flags & SEC_CODE) == 0
12345 || strcmp (isec->name, ".fixup") == 0
12346 || isec->call_check_done))
12347 {
12348 if (toc_adjusting_stub_needed (info, isec) < 0)
12349 return FALSE;
12350 }
12351 /* Make all sections use the TOC assigned for this object file.
12352 This will be wrong for pasted sections; We fix that in
12353 check_pasted_section(). */
12354 if (elf_gp (isec->owner) != 0)
12355 htab->toc_curr = elf_gp (isec->owner);
12356 }
12357
12358 htab->sec_info[isec->id].toc_off = htab->toc_curr;
12359 return TRUE;
12360 }
12361
12362 /* Check that all .init and .fini sections use the same toc, if they
12363 have toc relocs. */
12364
12365 static bfd_boolean
12366 check_pasted_section (struct bfd_link_info *info, const char *name)
12367 {
12368 asection *o = bfd_get_section_by_name (info->output_bfd, name);
12369
12370 if (o != NULL)
12371 {
12372 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12373 bfd_vma toc_off = 0;
12374 asection *i;
12375
12376 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
12377 if (i->has_toc_reloc)
12378 {
12379 if (toc_off == 0)
12380 toc_off = htab->sec_info[i->id].toc_off;
12381 else if (toc_off != htab->sec_info[i->id].toc_off)
12382 return FALSE;
12383 }
12384
12385 if (toc_off == 0)
12386 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
12387 if (i->makes_toc_func_call)
12388 {
12389 toc_off = htab->sec_info[i->id].toc_off;
12390 break;
12391 }
12392
12393 /* Make sure the whole pasted function uses the same toc offset. */
12394 if (toc_off != 0)
12395 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
12396 htab->sec_info[i->id].toc_off = toc_off;
12397 }
12398 return TRUE;
12399 }
12400
12401 bfd_boolean
12402 ppc64_elf_check_init_fini (struct bfd_link_info *info)
12403 {
12404 return (check_pasted_section (info, ".init")
12405 & check_pasted_section (info, ".fini"));
12406 }
12407
12408 /* See whether we can group stub sections together. Grouping stub
12409 sections may result in fewer stubs. More importantly, we need to
12410 put all .init* and .fini* stubs at the beginning of the .init or
12411 .fini output sections respectively, because glibc splits the
12412 _init and _fini functions into multiple parts. Putting a stub in
12413 the middle of a function is not a good idea. */
12414
12415 static bfd_boolean
12416 group_sections (struct bfd_link_info *info,
12417 bfd_size_type stub_group_size,
12418 bfd_boolean stubs_always_before_branch)
12419 {
12420 struct ppc_link_hash_table *htab;
12421 asection *osec;
12422 bfd_boolean suppress_size_errors;
12423
12424 htab = ppc_hash_table (info);
12425 if (htab == NULL)
12426 return FALSE;
12427
12428 suppress_size_errors = FALSE;
12429 if (stub_group_size == 1)
12430 {
12431 /* Default values. */
12432 if (stubs_always_before_branch)
12433 stub_group_size = 0x1e00000;
12434 else
12435 stub_group_size = 0x1c00000;
12436 suppress_size_errors = TRUE;
12437 }
12438
12439 for (osec = info->output_bfd->sections; osec != NULL; osec = osec->next)
12440 {
12441 asection *tail;
12442
12443 if (osec->id >= htab->sec_info_arr_size)
12444 continue;
12445
12446 tail = htab->sec_info[osec->id].u.list;
12447 while (tail != NULL)
12448 {
12449 asection *curr;
12450 asection *prev;
12451 bfd_size_type total;
12452 bfd_boolean big_sec;
12453 bfd_vma curr_toc;
12454 struct map_stub *group;
12455 bfd_size_type group_size;
12456
12457 curr = tail;
12458 total = tail->size;
12459 group_size = (ppc64_elf_section_data (tail) != NULL
12460 && ppc64_elf_section_data (tail)->has_14bit_branch
12461 ? stub_group_size >> 10 : stub_group_size);
12462
12463 big_sec = total > group_size;
12464 if (big_sec && !suppress_size_errors)
12465 /* xgettext:c-format */
12466 _bfd_error_handler (_("%pB section %pA exceeds stub group size"),
12467 tail->owner, tail);
12468 curr_toc = htab->sec_info[tail->id].toc_off;
12469
12470 while ((prev = htab->sec_info[curr->id].u.list) != NULL
12471 && ((total += curr->output_offset - prev->output_offset)
12472 < (ppc64_elf_section_data (prev) != NULL
12473 && ppc64_elf_section_data (prev)->has_14bit_branch
12474 ? (group_size = stub_group_size >> 10) : group_size))
12475 && htab->sec_info[prev->id].toc_off == curr_toc)
12476 curr = prev;
12477
12478 /* OK, the size from the start of CURR to the end is less
12479 than group_size and thus can be handled by one stub
12480 section. (or the tail section is itself larger than
12481 group_size, in which case we may be toast.) We should
12482 really be keeping track of the total size of stubs added
12483 here, as stubs contribute to the final output section
12484 size. That's a little tricky, and this way will only
12485 break if stubs added make the total size more than 2^25,
12486 ie. for the default stub_group_size, if stubs total more
12487 than 2097152 bytes, or nearly 75000 plt call stubs. */
12488 group = bfd_alloc (curr->owner, sizeof (*group));
12489 if (group == NULL)
12490 return FALSE;
12491 group->link_sec = curr;
12492 group->stub_sec = NULL;
12493 group->needs_save_res = 0;
12494 group->tls_get_addr_opt_bctrl = -1u;
12495 group->next = htab->group;
12496 htab->group = group;
12497 do
12498 {
12499 prev = htab->sec_info[tail->id].u.list;
12500 /* Set up this stub group. */
12501 htab->sec_info[tail->id].u.group = group;
12502 }
12503 while (tail != curr && (tail = prev) != NULL);
12504
12505 /* But wait, there's more! Input sections up to group_size
12506 bytes before the stub section can be handled by it too.
12507 Don't do this if we have a really large section after the
12508 stubs, as adding more stubs increases the chance that
12509 branches may not reach into the stub section. */
12510 if (!stubs_always_before_branch && !big_sec)
12511 {
12512 total = 0;
12513 while (prev != NULL
12514 && ((total += tail->output_offset - prev->output_offset)
12515 < (ppc64_elf_section_data (prev) != NULL
12516 && ppc64_elf_section_data (prev)->has_14bit_branch
12517 ? (group_size = stub_group_size >> 10) : group_size))
12518 && htab->sec_info[prev->id].toc_off == curr_toc)
12519 {
12520 tail = prev;
12521 prev = htab->sec_info[tail->id].u.list;
12522 htab->sec_info[tail->id].u.group = group;
12523 }
12524 }
12525 tail = prev;
12526 }
12527 }
12528 return TRUE;
12529 }
12530
12531 static const unsigned char glink_eh_frame_cie[] =
12532 {
12533 0, 0, 0, 16, /* length. */
12534 0, 0, 0, 0, /* id. */
12535 1, /* CIE version. */
12536 'z', 'R', 0, /* Augmentation string. */
12537 4, /* Code alignment. */
12538 0x78, /* Data alignment. */
12539 65, /* RA reg. */
12540 1, /* Augmentation size. */
12541 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
12542 DW_CFA_def_cfa, 1, 0 /* def_cfa: r1 offset 0. */
12543 };
12544
12545 static size_t
12546 stub_eh_frame_size (struct map_stub *group, size_t align)
12547 {
12548 size_t this_size = 17;
12549 if (group->tls_get_addr_opt_bctrl != -1u)
12550 {
12551 unsigned int to_bctrl = group->tls_get_addr_opt_bctrl / 4;
12552 if (to_bctrl < 64)
12553 this_size += 1;
12554 else if (to_bctrl < 256)
12555 this_size += 2;
12556 else if (to_bctrl < 65536)
12557 this_size += 3;
12558 else
12559 this_size += 5;
12560 this_size += 6;
12561 }
12562 this_size = (this_size + align - 1) & -align;
12563 return this_size;
12564 }
12565
12566 /* Stripping output sections is normally done before dynamic section
12567 symbols have been allocated. This function is called later, and
12568 handles cases like htab->brlt which is mapped to its own output
12569 section. */
12570
12571 static void
12572 maybe_strip_output (struct bfd_link_info *info, asection *isec)
12573 {
12574 if (isec->size == 0
12575 && isec->output_section->size == 0
12576 && !(isec->output_section->flags & SEC_KEEP)
12577 && !bfd_section_removed_from_list (info->output_bfd,
12578 isec->output_section)
12579 && elf_section_data (isec->output_section)->dynindx == 0)
12580 {
12581 isec->output_section->flags |= SEC_EXCLUDE;
12582 bfd_section_list_remove (info->output_bfd, isec->output_section);
12583 info->output_bfd->section_count--;
12584 }
12585 }
12586
12587 /* Determine and set the size of the stub section for a final link.
12588
12589 The basic idea here is to examine all the relocations looking for
12590 PC-relative calls to a target that is unreachable with a "bl"
12591 instruction. */
12592
12593 bfd_boolean
12594 ppc64_elf_size_stubs (struct bfd_link_info *info)
12595 {
12596 bfd_size_type stub_group_size;
12597 bfd_boolean stubs_always_before_branch;
12598 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12599
12600 if (htab == NULL)
12601 return FALSE;
12602
12603 if (htab->params->plt_thread_safe == -1 && !bfd_link_executable (info))
12604 htab->params->plt_thread_safe = 1;
12605 if (!htab->opd_abi)
12606 htab->params->plt_thread_safe = 0;
12607 else if (htab->params->plt_thread_safe == -1)
12608 {
12609 static const char *const thread_starter[] =
12610 {
12611 "pthread_create",
12612 /* libstdc++ */
12613 "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE",
12614 /* librt */
12615 "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio",
12616 "mq_notify", "create_timer",
12617 /* libanl */
12618 "getaddrinfo_a",
12619 /* libgomp */
12620 "GOMP_parallel",
12621 "GOMP_parallel_start",
12622 "GOMP_parallel_loop_static",
12623 "GOMP_parallel_loop_static_start",
12624 "GOMP_parallel_loop_dynamic",
12625 "GOMP_parallel_loop_dynamic_start",
12626 "GOMP_parallel_loop_guided",
12627 "GOMP_parallel_loop_guided_start",
12628 "GOMP_parallel_loop_runtime",
12629 "GOMP_parallel_loop_runtime_start",
12630 "GOMP_parallel_sections",
12631 "GOMP_parallel_sections_start",
12632 /* libgo */
12633 "__go_go",
12634 };
12635 unsigned i;
12636
12637 for (i = 0; i < ARRAY_SIZE (thread_starter); i++)
12638 {
12639 struct elf_link_hash_entry *h;
12640 h = elf_link_hash_lookup (&htab->elf, thread_starter[i],
12641 FALSE, FALSE, TRUE);
12642 htab->params->plt_thread_safe = h != NULL && h->ref_regular;
12643 if (htab->params->plt_thread_safe)
12644 break;
12645 }
12646 }
12647 stubs_always_before_branch = htab->params->group_size < 0;
12648 if (htab->params->group_size < 0)
12649 stub_group_size = -htab->params->group_size;
12650 else
12651 stub_group_size = htab->params->group_size;
12652
12653 if (!group_sections (info, stub_group_size, stubs_always_before_branch))
12654 return FALSE;
12655
12656 #define STUB_SHRINK_ITER 20
12657 /* Loop until no stubs added. After iteration 20 of this loop we may
12658 exit on a stub section shrinking. This is to break out of a
12659 pathological case where adding stubs on one iteration decreases
12660 section gaps (perhaps due to alignment), which then requires
12661 fewer or smaller stubs on the next iteration. */
12662
12663 while (1)
12664 {
12665 bfd *input_bfd;
12666 unsigned int bfd_indx;
12667 struct map_stub *group;
12668
12669 htab->stub_iteration += 1;
12670
12671 for (input_bfd = info->input_bfds, bfd_indx = 0;
12672 input_bfd != NULL;
12673 input_bfd = input_bfd->link.next, bfd_indx++)
12674 {
12675 Elf_Internal_Shdr *symtab_hdr;
12676 asection *section;
12677 Elf_Internal_Sym *local_syms = NULL;
12678
12679 if (!is_ppc64_elf (input_bfd))
12680 continue;
12681
12682 /* We'll need the symbol table in a second. */
12683 symtab_hdr = &elf_symtab_hdr (input_bfd);
12684 if (symtab_hdr->sh_info == 0)
12685 continue;
12686
12687 /* Walk over each section attached to the input bfd. */
12688 for (section = input_bfd->sections;
12689 section != NULL;
12690 section = section->next)
12691 {
12692 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
12693
12694 /* If there aren't any relocs, then there's nothing more
12695 to do. */
12696 if ((section->flags & SEC_RELOC) == 0
12697 || (section->flags & SEC_ALLOC) == 0
12698 || (section->flags & SEC_LOAD) == 0
12699 || (section->flags & SEC_CODE) == 0
12700 || section->reloc_count == 0)
12701 continue;
12702
12703 /* If this section is a link-once section that will be
12704 discarded, then don't create any stubs. */
12705 if (section->output_section == NULL
12706 || section->output_section->owner != info->output_bfd)
12707 continue;
12708
12709 /* Get the relocs. */
12710 internal_relocs
12711 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
12712 info->keep_memory);
12713 if (internal_relocs == NULL)
12714 goto error_ret_free_local;
12715
12716 /* Now examine each relocation. */
12717 irela = internal_relocs;
12718 irelaend = irela + section->reloc_count;
12719 for (; irela < irelaend; irela++)
12720 {
12721 enum elf_ppc64_reloc_type r_type;
12722 unsigned int r_indx;
12723 enum ppc_stub_type stub_type;
12724 struct ppc_stub_hash_entry *stub_entry;
12725 asection *sym_sec, *code_sec;
12726 bfd_vma sym_value, code_value;
12727 bfd_vma destination;
12728 unsigned long local_off;
12729 bfd_boolean ok_dest;
12730 struct ppc_link_hash_entry *hash;
12731 struct ppc_link_hash_entry *fdh;
12732 struct elf_link_hash_entry *h;
12733 Elf_Internal_Sym *sym;
12734 char *stub_name;
12735 const asection *id_sec;
12736 struct _opd_sec_data *opd;
12737 struct plt_entry *plt_ent;
12738
12739 r_type = ELF64_R_TYPE (irela->r_info);
12740 r_indx = ELF64_R_SYM (irela->r_info);
12741
12742 if (r_type >= R_PPC64_max)
12743 {
12744 bfd_set_error (bfd_error_bad_value);
12745 goto error_ret_free_internal;
12746 }
12747
12748 /* Only look for stubs on branch instructions. */
12749 if (r_type != R_PPC64_REL24
12750 && r_type != R_PPC64_REL14
12751 && r_type != R_PPC64_REL14_BRTAKEN
12752 && r_type != R_PPC64_REL14_BRNTAKEN)
12753 continue;
12754
12755 /* Now determine the call target, its name, value,
12756 section. */
12757 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
12758 r_indx, input_bfd))
12759 goto error_ret_free_internal;
12760 hash = (struct ppc_link_hash_entry *) h;
12761
12762 ok_dest = FALSE;
12763 fdh = NULL;
12764 sym_value = 0;
12765 if (hash == NULL)
12766 {
12767 sym_value = sym->st_value;
12768 if (sym_sec != NULL
12769 && sym_sec->output_section != NULL)
12770 ok_dest = TRUE;
12771 }
12772 else if (hash->elf.root.type == bfd_link_hash_defined
12773 || hash->elf.root.type == bfd_link_hash_defweak)
12774 {
12775 sym_value = hash->elf.root.u.def.value;
12776 if (sym_sec->output_section != NULL)
12777 ok_dest = TRUE;
12778 }
12779 else if (hash->elf.root.type == bfd_link_hash_undefweak
12780 || hash->elf.root.type == bfd_link_hash_undefined)
12781 {
12782 /* Recognise an old ABI func code entry sym, and
12783 use the func descriptor sym instead if it is
12784 defined. */
12785 if (hash->elf.root.root.string[0] == '.'
12786 && hash->oh != NULL)
12787 {
12788 fdh = ppc_follow_link (hash->oh);
12789 if (fdh->elf.root.type == bfd_link_hash_defined
12790 || fdh->elf.root.type == bfd_link_hash_defweak)
12791 {
12792 sym_sec = fdh->elf.root.u.def.section;
12793 sym_value = fdh->elf.root.u.def.value;
12794 if (sym_sec->output_section != NULL)
12795 ok_dest = TRUE;
12796 }
12797 else
12798 fdh = NULL;
12799 }
12800 }
12801 else
12802 {
12803 bfd_set_error (bfd_error_bad_value);
12804 goto error_ret_free_internal;
12805 }
12806
12807 destination = 0;
12808 local_off = 0;
12809 if (ok_dest)
12810 {
12811 sym_value += irela->r_addend;
12812 destination = (sym_value
12813 + sym_sec->output_offset
12814 + sym_sec->output_section->vma);
12815 local_off = PPC64_LOCAL_ENTRY_OFFSET (hash
12816 ? hash->elf.other
12817 : sym->st_other);
12818 }
12819
12820 code_sec = sym_sec;
12821 code_value = sym_value;
12822 opd = get_opd_info (sym_sec);
12823 if (opd != NULL)
12824 {
12825 bfd_vma dest;
12826
12827 if (hash == NULL && opd->adjust != NULL)
12828 {
12829 long adjust = opd->adjust[OPD_NDX (sym_value)];
12830 if (adjust == -1)
12831 continue;
12832 code_value += adjust;
12833 sym_value += adjust;
12834 }
12835 dest = opd_entry_value (sym_sec, sym_value,
12836 &code_sec, &code_value, FALSE);
12837 if (dest != (bfd_vma) -1)
12838 {
12839 destination = dest;
12840 if (fdh != NULL)
12841 {
12842 /* Fixup old ABI sym to point at code
12843 entry. */
12844 hash->elf.root.type = bfd_link_hash_defweak;
12845 hash->elf.root.u.def.section = code_sec;
12846 hash->elf.root.u.def.value = code_value;
12847 }
12848 }
12849 }
12850
12851 /* Determine what (if any) linker stub is needed. */
12852 plt_ent = NULL;
12853 stub_type = ppc_type_of_stub (section, irela, &hash,
12854 &plt_ent, destination,
12855 local_off);
12856
12857 if (stub_type != ppc_stub_plt_call)
12858 {
12859 /* Check whether we need a TOC adjusting stub.
12860 Since the linker pastes together pieces from
12861 different object files when creating the
12862 _init and _fini functions, it may be that a
12863 call to what looks like a local sym is in
12864 fact a call needing a TOC adjustment. */
12865 if (code_sec != NULL
12866 && code_sec->output_section != NULL
12867 && (htab->sec_info[code_sec->id].toc_off
12868 != htab->sec_info[section->id].toc_off)
12869 && (code_sec->has_toc_reloc
12870 || code_sec->makes_toc_func_call))
12871 stub_type = ppc_stub_long_branch_r2off;
12872 }
12873
12874 if (stub_type == ppc_stub_none)
12875 continue;
12876
12877 /* __tls_get_addr calls might be eliminated. */
12878 if (stub_type != ppc_stub_plt_call
12879 && hash != NULL
12880 && (hash == htab->tls_get_addr
12881 || hash == htab->tls_get_addr_fd)
12882 && section->has_tls_reloc
12883 && irela != internal_relocs)
12884 {
12885 /* Get tls info. */
12886 unsigned char *tls_mask;
12887
12888 if (!get_tls_mask (&tls_mask, NULL, NULL, &local_syms,
12889 irela - 1, input_bfd))
12890 goto error_ret_free_internal;
12891 if ((*tls_mask & TLS_TLS) != 0)
12892 continue;
12893 }
12894
12895 if (stub_type == ppc_stub_plt_call)
12896 {
12897 if (!htab->opd_abi
12898 && htab->params->plt_localentry0 != 0
12899 && is_elfv2_localentry0 (&hash->elf))
12900 htab->has_plt_localentry0 = 1;
12901 else if (irela + 1 < irelaend
12902 && irela[1].r_offset == irela->r_offset + 4
12903 && (ELF64_R_TYPE (irela[1].r_info)
12904 == R_PPC64_TOCSAVE))
12905 {
12906 if (!tocsave_find (htab, INSERT,
12907 &local_syms, irela + 1, input_bfd))
12908 goto error_ret_free_internal;
12909 }
12910 else
12911 stub_type = ppc_stub_plt_call_r2save;
12912 }
12913
12914 /* Support for grouping stub sections. */
12915 id_sec = htab->sec_info[section->id].u.group->link_sec;
12916
12917 /* Get the name of this stub. */
12918 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
12919 if (!stub_name)
12920 goto error_ret_free_internal;
12921
12922 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
12923 stub_name, FALSE, FALSE);
12924 if (stub_entry != NULL)
12925 {
12926 /* The proper stub has already been created. */
12927 free (stub_name);
12928 if (stub_type == ppc_stub_plt_call_r2save)
12929 stub_entry->stub_type = stub_type;
12930 continue;
12931 }
12932
12933 stub_entry = ppc_add_stub (stub_name, section, info);
12934 if (stub_entry == NULL)
12935 {
12936 free (stub_name);
12937 error_ret_free_internal:
12938 if (elf_section_data (section)->relocs == NULL)
12939 free (internal_relocs);
12940 error_ret_free_local:
12941 if (local_syms != NULL
12942 && (symtab_hdr->contents
12943 != (unsigned char *) local_syms))
12944 free (local_syms);
12945 return FALSE;
12946 }
12947
12948 stub_entry->stub_type = stub_type;
12949 if (stub_type != ppc_stub_plt_call
12950 && stub_type != ppc_stub_plt_call_r2save)
12951 {
12952 stub_entry->target_value = code_value;
12953 stub_entry->target_section = code_sec;
12954 }
12955 else
12956 {
12957 stub_entry->target_value = sym_value;
12958 stub_entry->target_section = sym_sec;
12959 }
12960 stub_entry->h = hash;
12961 stub_entry->plt_ent = plt_ent;
12962 stub_entry->symtype
12963 = hash ? hash->elf.type : ELF_ST_TYPE (sym->st_info);
12964 stub_entry->other = hash ? hash->elf.other : sym->st_other;
12965
12966 if (stub_entry->h != NULL)
12967 htab->stub_globals += 1;
12968 }
12969
12970 /* We're done with the internal relocs, free them. */
12971 if (elf_section_data (section)->relocs != internal_relocs)
12972 free (internal_relocs);
12973 }
12974
12975 if (local_syms != NULL
12976 && symtab_hdr->contents != (unsigned char *) local_syms)
12977 {
12978 if (!info->keep_memory)
12979 free (local_syms);
12980 else
12981 symtab_hdr->contents = (unsigned char *) local_syms;
12982 }
12983 }
12984
12985 /* We may have added some stubs. Find out the new size of the
12986 stub sections. */
12987 for (group = htab->group; group != NULL; group = group->next)
12988 if (group->stub_sec != NULL)
12989 {
12990 asection *stub_sec = group->stub_sec;
12991
12992 if (htab->stub_iteration <= STUB_SHRINK_ITER
12993 || stub_sec->rawsize < stub_sec->size)
12994 /* Past STUB_SHRINK_ITER, rawsize is the max size seen. */
12995 stub_sec->rawsize = stub_sec->size;
12996 stub_sec->size = 0;
12997 stub_sec->reloc_count = 0;
12998 stub_sec->flags &= ~SEC_RELOC;
12999 }
13000
13001 if (htab->stub_iteration <= STUB_SHRINK_ITER
13002 || htab->brlt->rawsize < htab->brlt->size)
13003 htab->brlt->rawsize = htab->brlt->size;
13004 htab->brlt->size = 0;
13005 htab->brlt->reloc_count = 0;
13006 htab->brlt->flags &= ~SEC_RELOC;
13007 if (htab->relbrlt != NULL)
13008 htab->relbrlt->size = 0;
13009
13010 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
13011
13012 for (group = htab->group; group != NULL; group = group->next)
13013 if (group->needs_save_res)
13014 group->stub_sec->size += htab->sfpr->size;
13015
13016 if (info->emitrelocations
13017 && htab->glink != NULL && htab->glink->size != 0)
13018 {
13019 htab->glink->reloc_count = 1;
13020 htab->glink->flags |= SEC_RELOC;
13021 }
13022
13023 if (htab->glink_eh_frame != NULL
13024 && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
13025 && htab->glink_eh_frame->output_section->size > 8)
13026 {
13027 size_t size = 0, align = 4;
13028
13029 for (group = htab->group; group != NULL; group = group->next)
13030 if (group->stub_sec != NULL)
13031 size += stub_eh_frame_size (group, align);
13032 if (htab->glink != NULL && htab->glink->size != 0)
13033 size += (24 + align - 1) & -align;
13034 if (size != 0)
13035 size += (sizeof (glink_eh_frame_cie) + align - 1) & -align;
13036 align = 1ul << htab->glink_eh_frame->output_section->alignment_power;
13037 size = (size + align - 1) & -align;
13038 htab->glink_eh_frame->rawsize = htab->glink_eh_frame->size;
13039 htab->glink_eh_frame->size = size;
13040 }
13041
13042 if (htab->params->plt_stub_align != 0)
13043 for (group = htab->group; group != NULL; group = group->next)
13044 if (group->stub_sec != NULL)
13045 {
13046 int align = abs (htab->params->plt_stub_align);
13047 group->stub_sec->size
13048 = (group->stub_sec->size + (1 << align) - 1) & -(1 << align);
13049 }
13050
13051 for (group = htab->group; group != NULL; group = group->next)
13052 if (group->stub_sec != NULL
13053 && group->stub_sec->rawsize != group->stub_sec->size
13054 && (htab->stub_iteration <= STUB_SHRINK_ITER
13055 || group->stub_sec->rawsize < group->stub_sec->size))
13056 break;
13057
13058 if (group == NULL
13059 && (htab->brlt->rawsize == htab->brlt->size
13060 || (htab->stub_iteration > STUB_SHRINK_ITER
13061 && htab->brlt->rawsize > htab->brlt->size))
13062 && (htab->glink_eh_frame == NULL
13063 || htab->glink_eh_frame->rawsize == htab->glink_eh_frame->size))
13064 break;
13065
13066 /* Ask the linker to do its stuff. */
13067 (*htab->params->layout_sections_again) ();
13068 }
13069
13070 if (htab->glink_eh_frame != NULL
13071 && htab->glink_eh_frame->size != 0)
13072 {
13073 bfd_vma val;
13074 bfd_byte *p, *last_fde;
13075 size_t last_fde_len, size, align, pad;
13076 struct map_stub *group;
13077
13078 p = bfd_zalloc (htab->glink_eh_frame->owner, htab->glink_eh_frame->size);
13079 if (p == NULL)
13080 return FALSE;
13081 htab->glink_eh_frame->contents = p;
13082 last_fde = p;
13083 align = 4;
13084
13085 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
13086 /* CIE length (rewrite in case little-endian). */
13087 last_fde_len = ((sizeof (glink_eh_frame_cie) + align - 1) & -align) - 4;
13088 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
13089 p += last_fde_len + 4;
13090
13091 for (group = htab->group; group != NULL; group = group->next)
13092 if (group->stub_sec != NULL)
13093 {
13094 last_fde = p;
13095 last_fde_len = stub_eh_frame_size (group, align) - 4;
13096 /* FDE length. */
13097 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
13098 p += 4;
13099 /* CIE pointer. */
13100 val = p - htab->glink_eh_frame->contents;
13101 bfd_put_32 (htab->elf.dynobj, val, p);
13102 p += 4;
13103 /* Offset to stub section, written later. */
13104 p += 4;
13105 /* stub section size. */
13106 bfd_put_32 (htab->elf.dynobj, group->stub_sec->size, p);
13107 p += 4;
13108 /* Augmentation. */
13109 p += 1;
13110 if (group->tls_get_addr_opt_bctrl != -1u)
13111 {
13112 unsigned int to_bctrl = group->tls_get_addr_opt_bctrl / 4;
13113
13114 /* This FDE needs more than just the default.
13115 Describe __tls_get_addr_opt stub LR. */
13116 if (to_bctrl < 64)
13117 *p++ = DW_CFA_advance_loc + to_bctrl;
13118 else if (to_bctrl < 256)
13119 {
13120 *p++ = DW_CFA_advance_loc1;
13121 *p++ = to_bctrl;
13122 }
13123 else if (to_bctrl < 65536)
13124 {
13125 *p++ = DW_CFA_advance_loc2;
13126 bfd_put_16 (htab->elf.dynobj, to_bctrl, p);
13127 p += 2;
13128 }
13129 else
13130 {
13131 *p++ = DW_CFA_advance_loc4;
13132 bfd_put_32 (htab->elf.dynobj, to_bctrl, p);
13133 p += 4;
13134 }
13135 *p++ = DW_CFA_offset_extended_sf;
13136 *p++ = 65;
13137 *p++ = -(STK_LINKER (htab) / 8) & 0x7f;
13138 *p++ = DW_CFA_advance_loc + 4;
13139 *p++ = DW_CFA_restore_extended;
13140 *p++ = 65;
13141 }
13142 /* Pad. */
13143 p = last_fde + last_fde_len + 4;
13144 }
13145 if (htab->glink != NULL && htab->glink->size != 0)
13146 {
13147 last_fde = p;
13148 last_fde_len = ((24 + align - 1) & -align) - 4;
13149 /* FDE length. */
13150 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
13151 p += 4;
13152 /* CIE pointer. */
13153 val = p - htab->glink_eh_frame->contents;
13154 bfd_put_32 (htab->elf.dynobj, val, p);
13155 p += 4;
13156 /* Offset to .glink, written later. */
13157 p += 4;
13158 /* .glink size. */
13159 bfd_put_32 (htab->elf.dynobj, htab->glink->size - 8, p);
13160 p += 4;
13161 /* Augmentation. */
13162 p += 1;
13163
13164 *p++ = DW_CFA_advance_loc + 1;
13165 *p++ = DW_CFA_register;
13166 *p++ = 65;
13167 *p++ = htab->opd_abi ? 12 : 0;
13168 *p++ = DW_CFA_advance_loc + (htab->opd_abi ? 5 : 7);
13169 *p++ = DW_CFA_restore_extended;
13170 *p++ = 65;
13171 p += ((24 + align - 1) & -align) - 24;
13172 }
13173 /* Subsume any padding into the last FDE if user .eh_frame
13174 sections are aligned more than glink_eh_frame. Otherwise any
13175 zero padding will be seen as a terminator. */
13176 align = 1ul << htab->glink_eh_frame->output_section->alignment_power;
13177 size = p - htab->glink_eh_frame->contents;
13178 pad = ((size + align - 1) & -align) - size;
13179 htab->glink_eh_frame->size = size + pad;
13180 bfd_put_32 (htab->elf.dynobj, last_fde_len + pad, last_fde);
13181 }
13182
13183 maybe_strip_output (info, htab->brlt);
13184 if (htab->glink_eh_frame != NULL)
13185 maybe_strip_output (info, htab->glink_eh_frame);
13186
13187 return TRUE;
13188 }
13189
13190 /* Called after we have determined section placement. If sections
13191 move, we'll be called again. Provide a value for TOCstart. */
13192
13193 bfd_vma
13194 ppc64_elf_set_toc (struct bfd_link_info *info, bfd *obfd)
13195 {
13196 asection *s;
13197 bfd_vma TOCstart, adjust;
13198
13199 if (info != NULL)
13200 {
13201 struct elf_link_hash_entry *h;
13202 struct elf_link_hash_table *htab = elf_hash_table (info);
13203
13204 if (is_elf_hash_table (htab)
13205 && htab->hgot != NULL)
13206 h = htab->hgot;
13207 else
13208 {
13209 h = elf_link_hash_lookup (htab, ".TOC.", FALSE, FALSE, TRUE);
13210 if (is_elf_hash_table (htab))
13211 htab->hgot = h;
13212 }
13213 if (h != NULL
13214 && h->root.type == bfd_link_hash_defined
13215 && !h->root.linker_def
13216 && (!is_elf_hash_table (htab)
13217 || h->def_regular))
13218 {
13219 TOCstart = (h->root.u.def.value - TOC_BASE_OFF
13220 + h->root.u.def.section->output_offset
13221 + h->root.u.def.section->output_section->vma);
13222 _bfd_set_gp_value (obfd, TOCstart);
13223 return TOCstart;
13224 }
13225 }
13226
13227 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
13228 order. The TOC starts where the first of these sections starts. */
13229 s = bfd_get_section_by_name (obfd, ".got");
13230 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
13231 s = bfd_get_section_by_name (obfd, ".toc");
13232 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
13233 s = bfd_get_section_by_name (obfd, ".tocbss");
13234 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
13235 s = bfd_get_section_by_name (obfd, ".plt");
13236 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
13237 {
13238 /* This may happen for
13239 o references to TOC base (SYM@toc / TOC[tc0]) without a
13240 .toc directive
13241 o bad linker script
13242 o --gc-sections and empty TOC sections
13243
13244 FIXME: Warn user? */
13245
13246 /* Look for a likely section. We probably won't even be
13247 using TOCstart. */
13248 for (s = obfd->sections; s != NULL; s = s->next)
13249 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY
13250 | SEC_EXCLUDE))
13251 == (SEC_ALLOC | SEC_SMALL_DATA))
13252 break;
13253 if (s == NULL)
13254 for (s = obfd->sections; s != NULL; s = s->next)
13255 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_EXCLUDE))
13256 == (SEC_ALLOC | SEC_SMALL_DATA))
13257 break;
13258 if (s == NULL)
13259 for (s = obfd->sections; s != NULL; s = s->next)
13260 if ((s->flags & (SEC_ALLOC | SEC_READONLY | SEC_EXCLUDE))
13261 == SEC_ALLOC)
13262 break;
13263 if (s == NULL)
13264 for (s = obfd->sections; s != NULL; s = s->next)
13265 if ((s->flags & (SEC_ALLOC | SEC_EXCLUDE)) == SEC_ALLOC)
13266 break;
13267 }
13268
13269 TOCstart = 0;
13270 if (s != NULL)
13271 TOCstart = s->output_section->vma + s->output_offset;
13272
13273 /* Force alignment. */
13274 adjust = TOCstart & (TOC_BASE_ALIGN - 1);
13275 TOCstart -= adjust;
13276 _bfd_set_gp_value (obfd, TOCstart);
13277
13278 if (info != NULL && s != NULL)
13279 {
13280 struct ppc_link_hash_table *htab = ppc_hash_table (info);
13281
13282 if (htab != NULL)
13283 {
13284 if (htab->elf.hgot != NULL)
13285 {
13286 htab->elf.hgot->root.u.def.value = TOC_BASE_OFF - adjust;
13287 htab->elf.hgot->root.u.def.section = s;
13288 }
13289 }
13290 else
13291 {
13292 struct bfd_link_hash_entry *bh = NULL;
13293 _bfd_generic_link_add_one_symbol (info, obfd, ".TOC.", BSF_GLOBAL,
13294 s, TOC_BASE_OFF - adjust,
13295 NULL, FALSE, FALSE, &bh);
13296 }
13297 }
13298 return TOCstart;
13299 }
13300
13301 /* Called via elf_link_hash_traverse from ppc64_elf_build_stubs to
13302 write out any global entry stubs, and PLT relocations. */
13303
13304 static bfd_boolean
13305 build_global_entry_stubs_and_plt (struct elf_link_hash_entry *h, void *inf)
13306 {
13307 struct bfd_link_info *info;
13308 struct ppc_link_hash_table *htab;
13309 struct plt_entry *ent;
13310 asection *s;
13311
13312 if (h->root.type == bfd_link_hash_indirect)
13313 return TRUE;
13314
13315 info = inf;
13316 htab = ppc_hash_table (info);
13317 if (htab == NULL)
13318 return FALSE;
13319
13320 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
13321 if (ent->plt.offset != (bfd_vma) -1)
13322 {
13323 /* This symbol has an entry in the procedure linkage
13324 table. Set it up. */
13325 Elf_Internal_Rela rela;
13326 asection *plt, *relplt;
13327 bfd_byte *loc;
13328
13329 if (!htab->elf.dynamic_sections_created
13330 || h->dynindx == -1)
13331 {
13332 if (!(h->def_regular
13333 && (h->root.type == bfd_link_hash_defined
13334 || h->root.type == bfd_link_hash_defweak)))
13335 continue;
13336 if (h->type == STT_GNU_IFUNC)
13337 {
13338 plt = htab->elf.iplt;
13339 relplt = htab->elf.irelplt;
13340 htab->local_ifunc_resolver = 1;
13341 if (htab->opd_abi)
13342 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
13343 else
13344 rela.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
13345 }
13346 else
13347 {
13348 plt = htab->pltlocal;
13349 if (bfd_link_pic (info))
13350 {
13351 relplt = htab->relpltlocal;
13352 if (htab->opd_abi)
13353 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_SLOT);
13354 else
13355 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
13356 }
13357 else
13358 relplt = NULL;
13359 }
13360 rela.r_addend = (h->root.u.def.value
13361 + h->root.u.def.section->output_offset
13362 + h->root.u.def.section->output_section->vma
13363 + ent->addend);
13364
13365 if (relplt == NULL)
13366 {
13367 loc = plt->contents + ent->plt.offset;
13368 bfd_put_64 (info->output_bfd, rela.r_addend, loc);
13369 if (htab->opd_abi)
13370 {
13371 bfd_vma toc = elf_gp (info->output_bfd);
13372 toc += htab->sec_info[h->root.u.def.section->id].toc_off;
13373 bfd_put_64 (info->output_bfd, toc, loc + 8);
13374 }
13375 }
13376 else
13377 {
13378 rela.r_offset = (plt->output_section->vma
13379 + plt->output_offset
13380 + ent->plt.offset);
13381 loc = relplt->contents + (relplt->reloc_count++
13382 * sizeof (Elf64_External_Rela));
13383 bfd_elf64_swap_reloca_out (info->output_bfd, &rela, loc);
13384 }
13385 }
13386 else
13387 {
13388 rela.r_offset = (htab->elf.splt->output_section->vma
13389 + htab->elf.splt->output_offset
13390 + ent->plt.offset);
13391 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
13392 rela.r_addend = ent->addend;
13393 loc = (htab->elf.srelplt->contents
13394 + ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE (htab))
13395 / PLT_ENTRY_SIZE (htab) * sizeof (Elf64_External_Rela)));
13396 if (h->type == STT_GNU_IFUNC && is_static_defined (h))
13397 htab->maybe_local_ifunc_resolver = 1;
13398 bfd_elf64_swap_reloca_out (info->output_bfd, &rela, loc);
13399 }
13400 }
13401
13402 if (!h->pointer_equality_needed)
13403 return TRUE;
13404
13405 if (h->def_regular)
13406 return TRUE;
13407
13408 s = htab->global_entry;
13409 if (s == NULL || s->size == 0)
13410 return TRUE;
13411
13412 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
13413 if (ent->plt.offset != (bfd_vma) -1
13414 && ent->addend == 0)
13415 {
13416 bfd_byte *p;
13417 asection *plt;
13418 bfd_vma off;
13419
13420 p = s->contents + h->root.u.def.value;
13421 plt = htab->elf.splt;
13422 if (!htab->elf.dynamic_sections_created
13423 || h->dynindx == -1)
13424 {
13425 if (h->type == STT_GNU_IFUNC)
13426 plt = htab->elf.iplt;
13427 else
13428 plt = htab->pltlocal;
13429 }
13430 off = ent->plt.offset + plt->output_offset + plt->output_section->vma;
13431 off -= h->root.u.def.value + s->output_offset + s->output_section->vma;
13432
13433 if (off + 0x80008000 > 0xffffffff || (off & 3) != 0)
13434 {
13435 info->callbacks->einfo
13436 (_("%P: linkage table error against `%pT'\n"),
13437 h->root.root.string);
13438 bfd_set_error (bfd_error_bad_value);
13439 htab->stub_error = TRUE;
13440 }
13441
13442 htab->stub_count[ppc_stub_global_entry - 1] += 1;
13443 if (htab->params->emit_stub_syms)
13444 {
13445 size_t len = strlen (h->root.root.string);
13446 char *name = bfd_malloc (sizeof "12345678.global_entry." + len);
13447
13448 if (name == NULL)
13449 return FALSE;
13450
13451 sprintf (name, "%08x.global_entry.%s", s->id, h->root.root.string);
13452 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
13453 if (h == NULL)
13454 return FALSE;
13455 if (h->root.type == bfd_link_hash_new)
13456 {
13457 h->root.type = bfd_link_hash_defined;
13458 h->root.u.def.section = s;
13459 h->root.u.def.value = p - s->contents;
13460 h->ref_regular = 1;
13461 h->def_regular = 1;
13462 h->ref_regular_nonweak = 1;
13463 h->forced_local = 1;
13464 h->non_elf = 0;
13465 h->root.linker_def = 1;
13466 }
13467 }
13468
13469 if (PPC_HA (off) != 0)
13470 {
13471 bfd_put_32 (s->owner, ADDIS_R12_R12 | PPC_HA (off), p);
13472 p += 4;
13473 }
13474 bfd_put_32 (s->owner, LD_R12_0R12 | PPC_LO (off), p);
13475 p += 4;
13476 bfd_put_32 (s->owner, MTCTR_R12, p);
13477 p += 4;
13478 bfd_put_32 (s->owner, BCTR, p);
13479 break;
13480 }
13481 return TRUE;
13482 }
13483
13484 /* Write PLT relocs for locals. */
13485
13486 static bfd_boolean
13487 write_plt_relocs_for_local_syms (struct bfd_link_info *info)
13488 {
13489 struct ppc_link_hash_table *htab = ppc_hash_table (info);
13490 bfd *ibfd;
13491
13492 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
13493 {
13494 struct got_entry **lgot_ents, **end_lgot_ents;
13495 struct plt_entry **local_plt, **lplt, **end_local_plt;
13496 Elf_Internal_Shdr *symtab_hdr;
13497 bfd_size_type locsymcount;
13498 Elf_Internal_Sym *local_syms = NULL;
13499 struct plt_entry *ent;
13500
13501 if (!is_ppc64_elf (ibfd))
13502 continue;
13503
13504 lgot_ents = elf_local_got_ents (ibfd);
13505 if (!lgot_ents)
13506 continue;
13507
13508 symtab_hdr = &elf_symtab_hdr (ibfd);
13509 locsymcount = symtab_hdr->sh_info;
13510 end_lgot_ents = lgot_ents + locsymcount;
13511 local_plt = (struct plt_entry **) end_lgot_ents;
13512 end_local_plt = local_plt + locsymcount;
13513 for (lplt = local_plt; lplt < end_local_plt; ++lplt)
13514 for (ent = *lplt; ent != NULL; ent = ent->next)
13515 if (ent->plt.offset != (bfd_vma) -1)
13516 {
13517 Elf_Internal_Sym *sym;
13518 asection *sym_sec;
13519 asection *plt, *relplt;
13520 bfd_byte *loc;
13521 bfd_vma val;
13522
13523 if (!get_sym_h (NULL, &sym, &sym_sec, NULL, &local_syms,
13524 lplt - local_plt, ibfd))
13525 {
13526 if (local_syms != NULL
13527 && symtab_hdr->contents != (unsigned char *) local_syms)
13528 free (local_syms);
13529 return FALSE;
13530 }
13531
13532 val = sym->st_value + ent->addend;
13533 val += PPC64_LOCAL_ENTRY_OFFSET (sym->st_other);
13534 if (sym_sec != NULL && sym_sec->output_section != NULL)
13535 val += sym_sec->output_offset + sym_sec->output_section->vma;
13536
13537 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
13538 {
13539 htab->local_ifunc_resolver = 1;
13540 plt = htab->elf.iplt;
13541 relplt = htab->elf.irelplt;
13542 }
13543 else
13544 {
13545 plt = htab->pltlocal;
13546 relplt = bfd_link_pic (info) ? htab->relpltlocal : NULL;
13547 }
13548
13549 if (relplt == NULL)
13550 {
13551 loc = plt->contents + ent->plt.offset;
13552 bfd_put_64 (info->output_bfd, val, loc);
13553 if (htab->opd_abi)
13554 {
13555 bfd_vma toc = elf_gp (ibfd);
13556 bfd_put_64 (info->output_bfd, toc, loc + 8);
13557 }
13558 }
13559 else
13560 {
13561 Elf_Internal_Rela rela;
13562 rela.r_offset = (ent->plt.offset
13563 + plt->output_offset
13564 + plt->output_section->vma);
13565 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
13566 {
13567 if (htab->opd_abi)
13568 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
13569 else
13570 rela.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
13571 }
13572 else
13573 {
13574 if (htab->opd_abi)
13575 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_SLOT);
13576 else
13577 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
13578 }
13579 rela.r_addend = val;
13580 loc = relplt->contents + (relplt->reloc_count++
13581 * sizeof (Elf64_External_Rela));
13582 bfd_elf64_swap_reloca_out (info->output_bfd, &rela, loc);
13583 }
13584 }
13585
13586 if (local_syms != NULL
13587 && symtab_hdr->contents != (unsigned char *) local_syms)
13588 {
13589 if (!info->keep_memory)
13590 free (local_syms);
13591 else
13592 symtab_hdr->contents = (unsigned char *) local_syms;
13593 }
13594 }
13595 return TRUE;
13596 }
13597
13598 /* Build all the stubs associated with the current output file.
13599 The stubs are kept in a hash table attached to the main linker
13600 hash table. This function is called via gldelf64ppc_finish. */
13601
13602 bfd_boolean
13603 ppc64_elf_build_stubs (struct bfd_link_info *info,
13604 char **stats)
13605 {
13606 struct ppc_link_hash_table *htab = ppc_hash_table (info);
13607 struct map_stub *group;
13608 asection *stub_sec;
13609 bfd_byte *p;
13610 int stub_sec_count = 0;
13611
13612 if (htab == NULL)
13613 return FALSE;
13614
13615 /* Allocate memory to hold the linker stubs. */
13616 for (group = htab->group; group != NULL; group = group->next)
13617 if ((stub_sec = group->stub_sec) != NULL
13618 && stub_sec->size != 0)
13619 {
13620 stub_sec->contents = bfd_zalloc (htab->params->stub_bfd, stub_sec->size);
13621 if (stub_sec->contents == NULL)
13622 return FALSE;
13623 stub_sec->size = 0;
13624 }
13625
13626 if (htab->glink != NULL && htab->glink->size != 0)
13627 {
13628 unsigned int indx;
13629 bfd_vma plt0;
13630
13631 /* Build the .glink plt call stub. */
13632 if (htab->params->emit_stub_syms)
13633 {
13634 struct elf_link_hash_entry *h;
13635 h = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
13636 TRUE, FALSE, FALSE);
13637 if (h == NULL)
13638 return FALSE;
13639 if (h->root.type == bfd_link_hash_new)
13640 {
13641 h->root.type = bfd_link_hash_defined;
13642 h->root.u.def.section = htab->glink;
13643 h->root.u.def.value = 8;
13644 h->ref_regular = 1;
13645 h->def_regular = 1;
13646 h->ref_regular_nonweak = 1;
13647 h->forced_local = 1;
13648 h->non_elf = 0;
13649 h->root.linker_def = 1;
13650 }
13651 }
13652 plt0 = (htab->elf.splt->output_section->vma
13653 + htab->elf.splt->output_offset
13654 - 16);
13655 if (info->emitrelocations)
13656 {
13657 Elf_Internal_Rela *r = get_relocs (htab->glink, 1);
13658 if (r == NULL)
13659 return FALSE;
13660 r->r_offset = (htab->glink->output_offset
13661 + htab->glink->output_section->vma);
13662 r->r_info = ELF64_R_INFO (0, R_PPC64_REL64);
13663 r->r_addend = plt0;
13664 }
13665 p = htab->glink->contents;
13666 plt0 -= htab->glink->output_section->vma + htab->glink->output_offset;
13667 bfd_put_64 (htab->glink->owner, plt0, p);
13668 p += 8;
13669 if (htab->opd_abi)
13670 {
13671 bfd_put_32 (htab->glink->owner, MFLR_R12, p);
13672 p += 4;
13673 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
13674 p += 4;
13675 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
13676 p += 4;
13677 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | (-16 & 0xfffc), p);
13678 p += 4;
13679 bfd_put_32 (htab->glink->owner, MTLR_R12, p);
13680 p += 4;
13681 bfd_put_32 (htab->glink->owner, ADD_R11_R2_R11, p);
13682 p += 4;
13683 bfd_put_32 (htab->glink->owner, LD_R12_0R11, p);
13684 p += 4;
13685 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | 8, p);
13686 p += 4;
13687 bfd_put_32 (htab->glink->owner, MTCTR_R12, p);
13688 p += 4;
13689 bfd_put_32 (htab->glink->owner, LD_R11_0R11 | 16, p);
13690 p += 4;
13691 }
13692 else
13693 {
13694 bfd_put_32 (htab->glink->owner, MFLR_R0, p);
13695 p += 4;
13696 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
13697 p += 4;
13698 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
13699 p += 4;
13700 bfd_put_32 (htab->glink->owner, STD_R2_0R1 + 24, p);
13701 p += 4;
13702 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | (-16 & 0xfffc), p);
13703 p += 4;
13704 bfd_put_32 (htab->glink->owner, MTLR_R0, p);
13705 p += 4;
13706 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
13707 p += 4;
13708 bfd_put_32 (htab->glink->owner, ADD_R11_R2_R11, p);
13709 p += 4;
13710 bfd_put_32 (htab->glink->owner, ADDI_R0_R12 | (-48 & 0xffff), p);
13711 p += 4;
13712 bfd_put_32 (htab->glink->owner, LD_R12_0R11, p);
13713 p += 4;
13714 bfd_put_32 (htab->glink->owner, SRDI_R0_R0_2, p);
13715 p += 4;
13716 bfd_put_32 (htab->glink->owner, MTCTR_R12, p);
13717 p += 4;
13718 bfd_put_32 (htab->glink->owner, LD_R11_0R11 | 8, p);
13719 p += 4;
13720 }
13721 bfd_put_32 (htab->glink->owner, BCTR, p);
13722 p += 4;
13723 BFD_ASSERT (p == htab->glink->contents + GLINK_PLTRESOLVE_SIZE (htab));
13724
13725 /* Build the .glink lazy link call stubs. */
13726 indx = 0;
13727 while (p < htab->glink->contents + htab->glink->size)
13728 {
13729 if (htab->opd_abi)
13730 {
13731 if (indx < 0x8000)
13732 {
13733 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
13734 p += 4;
13735 }
13736 else
13737 {
13738 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
13739 p += 4;
13740 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx),
13741 p);
13742 p += 4;
13743 }
13744 }
13745 bfd_put_32 (htab->glink->owner,
13746 B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p);
13747 indx++;
13748 p += 4;
13749 }
13750 }
13751
13752 /* Build .glink global entry stubs, and PLT relocs for globals. */
13753 elf_link_hash_traverse (&htab->elf, build_global_entry_stubs_and_plt, info);
13754
13755 if (!write_plt_relocs_for_local_syms (info))
13756 return FALSE;
13757
13758 if (htab->brlt != NULL && htab->brlt->size != 0)
13759 {
13760 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
13761 htab->brlt->size);
13762 if (htab->brlt->contents == NULL)
13763 return FALSE;
13764 }
13765 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
13766 {
13767 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
13768 htab->relbrlt->size);
13769 if (htab->relbrlt->contents == NULL)
13770 return FALSE;
13771 }
13772
13773 /* Build the stubs as directed by the stub hash table. */
13774 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
13775
13776 for (group = htab->group; group != NULL; group = group->next)
13777 if (group->needs_save_res)
13778 group->stub_sec->size += htab->sfpr->size;
13779
13780 if (htab->relbrlt != NULL)
13781 htab->relbrlt->reloc_count = 0;
13782
13783 if (htab->params->plt_stub_align != 0)
13784 for (group = htab->group; group != NULL; group = group->next)
13785 if ((stub_sec = group->stub_sec) != NULL)
13786 {
13787 int align = abs (htab->params->plt_stub_align);
13788 stub_sec->size = (stub_sec->size + (1 << align) - 1) & -(1 << align);
13789 }
13790
13791 for (group = htab->group; group != NULL; group = group->next)
13792 if (group->needs_save_res)
13793 {
13794 stub_sec = group->stub_sec;
13795 memcpy (stub_sec->contents + stub_sec->size - htab->sfpr->size,
13796 htab->sfpr->contents, htab->sfpr->size);
13797 if (htab->params->emit_stub_syms)
13798 {
13799 unsigned int i;
13800
13801 for (i = 0; i < ARRAY_SIZE (save_res_funcs); i++)
13802 if (!sfpr_define (info, &save_res_funcs[i], stub_sec))
13803 return FALSE;
13804 }
13805 }
13806
13807 for (group = htab->group; group != NULL; group = group->next)
13808 if ((stub_sec = group->stub_sec) != NULL)
13809 {
13810 stub_sec_count += 1;
13811 if (stub_sec->rawsize != stub_sec->size
13812 && (htab->stub_iteration <= STUB_SHRINK_ITER
13813 || stub_sec->rawsize < stub_sec->size))
13814 break;
13815 }
13816
13817 if (group != NULL)
13818 {
13819 htab->stub_error = TRUE;
13820 _bfd_error_handler (_("stubs don't match calculated size"));
13821 }
13822
13823 if (htab->stub_error)
13824 return FALSE;
13825
13826 if (stats != NULL)
13827 {
13828 size_t len;
13829 *stats = bfd_malloc (500);
13830 if (*stats == NULL)
13831 return FALSE;
13832
13833 len = sprintf (*stats,
13834 ngettext ("linker stubs in %u group\n",
13835 "linker stubs in %u groups\n",
13836 stub_sec_count),
13837 stub_sec_count);
13838 sprintf (*stats + len, _(" branch %lu\n"
13839 " toc adjust %lu\n"
13840 " long branch %lu\n"
13841 " long toc adj %lu\n"
13842 " plt call %lu\n"
13843 " plt call toc %lu\n"
13844 " global entry %lu"),
13845 htab->stub_count[ppc_stub_long_branch - 1],
13846 htab->stub_count[ppc_stub_long_branch_r2off - 1],
13847 htab->stub_count[ppc_stub_plt_branch - 1],
13848 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
13849 htab->stub_count[ppc_stub_plt_call - 1],
13850 htab->stub_count[ppc_stub_plt_call_r2save - 1],
13851 htab->stub_count[ppc_stub_global_entry - 1]);
13852 }
13853 return TRUE;
13854 }
13855
13856 /* What to do when ld finds relocations against symbols defined in
13857 discarded sections. */
13858
13859 static unsigned int
13860 ppc64_elf_action_discarded (asection *sec)
13861 {
13862 if (strcmp (".opd", sec->name) == 0)
13863 return 0;
13864
13865 if (strcmp (".toc", sec->name) == 0)
13866 return 0;
13867
13868 if (strcmp (".toc1", sec->name) == 0)
13869 return 0;
13870
13871 return _bfd_elf_default_action_discarded (sec);
13872 }
13873
13874 /* The RELOCATE_SECTION function is called by the ELF backend linker
13875 to handle the relocations for a section.
13876
13877 The relocs are always passed as Rela structures; if the section
13878 actually uses Rel structures, the r_addend field will always be
13879 zero.
13880
13881 This function is responsible for adjust the section contents as
13882 necessary, and (if using Rela relocs and generating a
13883 relocatable output file) adjusting the reloc addend as
13884 necessary.
13885
13886 This function does not have to worry about setting the reloc
13887 address or the reloc symbol index.
13888
13889 LOCAL_SYMS is a pointer to the swapped in local symbols.
13890
13891 LOCAL_SECTIONS is an array giving the section in the input file
13892 corresponding to the st_shndx field of each local symbol.
13893
13894 The global hash table entry for the global symbols can be found
13895 via elf_sym_hashes (input_bfd).
13896
13897 When generating relocatable output, this function must handle
13898 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
13899 going to be the section symbol corresponding to the output
13900 section, which means that the addend must be adjusted
13901 accordingly. */
13902
13903 static bfd_boolean
13904 ppc64_elf_relocate_section (bfd *output_bfd,
13905 struct bfd_link_info *info,
13906 bfd *input_bfd,
13907 asection *input_section,
13908 bfd_byte *contents,
13909 Elf_Internal_Rela *relocs,
13910 Elf_Internal_Sym *local_syms,
13911 asection **local_sections)
13912 {
13913 struct ppc_link_hash_table *htab;
13914 Elf_Internal_Shdr *symtab_hdr;
13915 struct elf_link_hash_entry **sym_hashes;
13916 Elf_Internal_Rela *rel;
13917 Elf_Internal_Rela *wrel;
13918 Elf_Internal_Rela *relend;
13919 Elf_Internal_Rela outrel;
13920 bfd_byte *loc;
13921 struct got_entry **local_got_ents;
13922 bfd_vma TOCstart;
13923 bfd_boolean ret = TRUE;
13924 bfd_boolean is_opd;
13925 /* Assume 'at' branch hints. */
13926 bfd_boolean is_isa_v2 = TRUE;
13927 bfd_vma d_offset = (bfd_big_endian (input_bfd) ? 2 : 0);
13928
13929 /* Initialize howto table if needed. */
13930 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
13931 ppc_howto_init ();
13932
13933 htab = ppc_hash_table (info);
13934 if (htab == NULL)
13935 return FALSE;
13936
13937 /* Don't relocate stub sections. */
13938 if (input_section->owner == htab->params->stub_bfd)
13939 return TRUE;
13940
13941 BFD_ASSERT (is_ppc64_elf (input_bfd));
13942
13943 local_got_ents = elf_local_got_ents (input_bfd);
13944 TOCstart = elf_gp (output_bfd);
13945 symtab_hdr = &elf_symtab_hdr (input_bfd);
13946 sym_hashes = elf_sym_hashes (input_bfd);
13947 is_opd = ppc64_elf_section_data (input_section)->sec_type == sec_opd;
13948
13949 rel = wrel = relocs;
13950 relend = relocs + input_section->reloc_count;
13951 for (; rel < relend; wrel++, rel++)
13952 {
13953 enum elf_ppc64_reloc_type r_type;
13954 bfd_vma addend;
13955 bfd_reloc_status_type r;
13956 Elf_Internal_Sym *sym;
13957 asection *sec;
13958 struct elf_link_hash_entry *h_elf;
13959 struct ppc_link_hash_entry *h;
13960 struct ppc_link_hash_entry *fdh;
13961 const char *sym_name;
13962 unsigned long r_symndx, toc_symndx;
13963 bfd_vma toc_addend;
13964 unsigned char tls_mask, tls_gd, tls_type;
13965 unsigned char sym_type;
13966 bfd_vma relocation;
13967 bfd_boolean unresolved_reloc, save_unresolved_reloc;
13968 bfd_boolean warned;
13969 enum { DEST_NORMAL, DEST_OPD, DEST_STUB } reloc_dest;
13970 unsigned int insn;
13971 unsigned int mask;
13972 struct ppc_stub_hash_entry *stub_entry;
13973 bfd_vma max_br_offset;
13974 bfd_vma from;
13975 Elf_Internal_Rela orig_rel;
13976 reloc_howto_type *howto;
13977 struct reloc_howto_struct alt_howto;
13978
13979 again:
13980 orig_rel = *rel;
13981
13982 r_type = ELF64_R_TYPE (rel->r_info);
13983 r_symndx = ELF64_R_SYM (rel->r_info);
13984
13985 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
13986 symbol of the previous ADDR64 reloc. The symbol gives us the
13987 proper TOC base to use. */
13988 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
13989 && wrel != relocs
13990 && ELF64_R_TYPE (wrel[-1].r_info) == R_PPC64_ADDR64
13991 && is_opd)
13992 r_symndx = ELF64_R_SYM (wrel[-1].r_info);
13993
13994 sym = NULL;
13995 sec = NULL;
13996 h_elf = NULL;
13997 sym_name = NULL;
13998 unresolved_reloc = FALSE;
13999 warned = FALSE;
14000
14001 if (r_symndx < symtab_hdr->sh_info)
14002 {
14003 /* It's a local symbol. */
14004 struct _opd_sec_data *opd;
14005
14006 sym = local_syms + r_symndx;
14007 sec = local_sections[r_symndx];
14008 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
14009 sym_type = ELF64_ST_TYPE (sym->st_info);
14010 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
14011 opd = get_opd_info (sec);
14012 if (opd != NULL && opd->adjust != NULL)
14013 {
14014 long adjust = opd->adjust[OPD_NDX (sym->st_value
14015 + rel->r_addend)];
14016 if (adjust == -1)
14017 relocation = 0;
14018 else
14019 {
14020 /* If this is a relocation against the opd section sym
14021 and we have edited .opd, adjust the reloc addend so
14022 that ld -r and ld --emit-relocs output is correct.
14023 If it is a reloc against some other .opd symbol,
14024 then the symbol value will be adjusted later. */
14025 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
14026 rel->r_addend += adjust;
14027 else
14028 relocation += adjust;
14029 }
14030 }
14031 }
14032 else
14033 {
14034 bfd_boolean ignored;
14035
14036 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
14037 r_symndx, symtab_hdr, sym_hashes,
14038 h_elf, sec, relocation,
14039 unresolved_reloc, warned, ignored);
14040 sym_name = h_elf->root.root.string;
14041 sym_type = h_elf->type;
14042 if (sec != NULL
14043 && sec->owner == output_bfd
14044 && strcmp (sec->name, ".opd") == 0)
14045 {
14046 /* This is a symbol defined in a linker script. All
14047 such are defined in output sections, even those
14048 defined by simple assignment from a symbol defined in
14049 an input section. Transfer the symbol to an
14050 appropriate input .opd section, so that a branch to
14051 this symbol will be mapped to the location specified
14052 by the opd entry. */
14053 struct bfd_link_order *lo;
14054 for (lo = sec->map_head.link_order; lo != NULL; lo = lo->next)
14055 if (lo->type == bfd_indirect_link_order)
14056 {
14057 asection *isec = lo->u.indirect.section;
14058 if (h_elf->root.u.def.value >= isec->output_offset
14059 && h_elf->root.u.def.value < (isec->output_offset
14060 + isec->size))
14061 {
14062 h_elf->root.u.def.value -= isec->output_offset;
14063 h_elf->root.u.def.section = isec;
14064 sec = isec;
14065 break;
14066 }
14067 }
14068 }
14069 }
14070 h = (struct ppc_link_hash_entry *) h_elf;
14071
14072 if (sec != NULL && discarded_section (sec))
14073 {
14074 _bfd_clear_contents (ppc64_elf_howto_table[r_type],
14075 input_bfd, input_section,
14076 contents + rel->r_offset);
14077 wrel->r_offset = rel->r_offset;
14078 wrel->r_info = 0;
14079 wrel->r_addend = 0;
14080
14081 /* For ld -r, remove relocations in debug sections against
14082 symbols defined in discarded sections. Not done for
14083 non-debug to preserve relocs in .eh_frame which the
14084 eh_frame editing code expects to be present. */
14085 if (bfd_link_relocatable (info)
14086 && (input_section->flags & SEC_DEBUGGING))
14087 wrel--;
14088
14089 continue;
14090 }
14091
14092 if (bfd_link_relocatable (info))
14093 goto copy_reloc;
14094
14095 if (h != NULL && &h->elf == htab->elf.hgot)
14096 {
14097 relocation = TOCstart + htab->sec_info[input_section->id].toc_off;
14098 sec = bfd_abs_section_ptr;
14099 unresolved_reloc = FALSE;
14100 }
14101
14102 /* TLS optimizations. Replace instruction sequences and relocs
14103 based on information we collected in tls_optimize. We edit
14104 RELOCS so that --emit-relocs will output something sensible
14105 for the final instruction stream. */
14106 tls_mask = 0;
14107 tls_gd = 0;
14108 toc_symndx = 0;
14109 if (h != NULL)
14110 tls_mask = h->tls_mask;
14111 else if (local_got_ents != NULL)
14112 {
14113 struct plt_entry **local_plt = (struct plt_entry **)
14114 (local_got_ents + symtab_hdr->sh_info);
14115 unsigned char *lgot_masks = (unsigned char *)
14116 (local_plt + symtab_hdr->sh_info);
14117 tls_mask = lgot_masks[r_symndx];
14118 }
14119 if (((tls_mask & TLS_TLS) == 0 || tls_mask == (TLS_TLS | TLS_MARK))
14120 && (r_type == R_PPC64_TLS
14121 || r_type == R_PPC64_TLSGD
14122 || r_type == R_PPC64_TLSLD))
14123 {
14124 /* Check for toc tls entries. */
14125 unsigned char *toc_tls;
14126
14127 if (!get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
14128 &local_syms, rel, input_bfd))
14129 return FALSE;
14130
14131 if (toc_tls)
14132 tls_mask = *toc_tls;
14133 }
14134
14135 /* Check that tls relocs are used with tls syms, and non-tls
14136 relocs are used with non-tls syms. */
14137 if (r_symndx != STN_UNDEF
14138 && r_type != R_PPC64_NONE
14139 && (h == NULL
14140 || h->elf.root.type == bfd_link_hash_defined
14141 || h->elf.root.type == bfd_link_hash_defweak)
14142 && (IS_PPC64_TLS_RELOC (r_type)
14143 != (sym_type == STT_TLS
14144 || (sym_type == STT_SECTION
14145 && (sec->flags & SEC_THREAD_LOCAL) != 0))))
14146 {
14147 if ((tls_mask & TLS_TLS) != 0
14148 && (r_type == R_PPC64_TLS
14149 || r_type == R_PPC64_TLSGD
14150 || r_type == R_PPC64_TLSLD))
14151 /* R_PPC64_TLS is OK against a symbol in the TOC. */
14152 ;
14153 else
14154 info->callbacks->einfo
14155 (!IS_PPC64_TLS_RELOC (r_type)
14156 /* xgettext:c-format */
14157 ? _("%H: %s used with TLS symbol `%pT'\n")
14158 /* xgettext:c-format */
14159 : _("%H: %s used with non-TLS symbol `%pT'\n"),
14160 input_bfd, input_section, rel->r_offset,
14161 ppc64_elf_howto_table[r_type]->name,
14162 sym_name);
14163 }
14164
14165 /* Ensure reloc mapping code below stays sane. */
14166 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
14167 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
14168 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
14169 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
14170 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
14171 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
14172 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
14173 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
14174 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
14175 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
14176 abort ();
14177
14178 switch (r_type)
14179 {
14180 default:
14181 break;
14182
14183 case R_PPC64_LO_DS_OPT:
14184 insn = bfd_get_32 (input_bfd, contents + rel->r_offset - d_offset);
14185 if ((insn & (0x3f << 26)) != 58u << 26)
14186 abort ();
14187 insn += (14u << 26) - (58u << 26);
14188 bfd_put_32 (input_bfd, insn, contents + rel->r_offset - d_offset);
14189 r_type = R_PPC64_TOC16_LO;
14190 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14191 break;
14192
14193 case R_PPC64_TOC16:
14194 case R_PPC64_TOC16_LO:
14195 case R_PPC64_TOC16_DS:
14196 case R_PPC64_TOC16_LO_DS:
14197 {
14198 /* Check for toc tls entries. */
14199 unsigned char *toc_tls;
14200 int retval;
14201
14202 retval = get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
14203 &local_syms, rel, input_bfd);
14204 if (retval == 0)
14205 return FALSE;
14206
14207 if (toc_tls)
14208 {
14209 tls_mask = *toc_tls;
14210 if (r_type == R_PPC64_TOC16_DS
14211 || r_type == R_PPC64_TOC16_LO_DS)
14212 {
14213 if ((tls_mask & TLS_TLS) != 0
14214 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
14215 goto toctprel;
14216 }
14217 else
14218 {
14219 /* If we found a GD reloc pair, then we might be
14220 doing a GD->IE transition. */
14221 if (retval == 2)
14222 {
14223 tls_gd = TLS_TPRELGD;
14224 if ((tls_mask & TLS_TLS) != 0
14225 && (tls_mask & TLS_GD) == 0)
14226 goto tls_ldgd_opt;
14227 }
14228 else if (retval == 3)
14229 {
14230 if ((tls_mask & TLS_TLS) != 0
14231 && (tls_mask & TLS_LD) == 0)
14232 goto tls_ldgd_opt;
14233 }
14234 }
14235 }
14236 }
14237 break;
14238
14239 case R_PPC64_GOT_TPREL16_HI:
14240 case R_PPC64_GOT_TPREL16_HA:
14241 if ((tls_mask & TLS_TLS) != 0
14242 && (tls_mask & TLS_TPREL) == 0)
14243 {
14244 rel->r_offset -= d_offset;
14245 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
14246 r_type = R_PPC64_NONE;
14247 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14248 }
14249 break;
14250
14251 case R_PPC64_GOT_TPREL16_DS:
14252 case R_PPC64_GOT_TPREL16_LO_DS:
14253 if ((tls_mask & TLS_TLS) != 0
14254 && (tls_mask & TLS_TPREL) == 0)
14255 {
14256 toctprel:
14257 insn = bfd_get_32 (input_bfd,
14258 contents + rel->r_offset - d_offset);
14259 insn &= 31 << 21;
14260 insn |= 0x3c0d0000; /* addis 0,13,0 */
14261 bfd_put_32 (input_bfd, insn,
14262 contents + rel->r_offset - d_offset);
14263 r_type = R_PPC64_TPREL16_HA;
14264 if (toc_symndx != 0)
14265 {
14266 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
14267 rel->r_addend = toc_addend;
14268 /* We changed the symbol. Start over in order to
14269 get h, sym, sec etc. right. */
14270 goto again;
14271 }
14272 else
14273 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14274 }
14275 break;
14276
14277 case R_PPC64_TLS:
14278 if ((tls_mask & TLS_TLS) != 0
14279 && (tls_mask & TLS_TPREL) == 0)
14280 {
14281 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
14282 insn = _bfd_elf_ppc_at_tls_transform (insn, 13);
14283 if (insn == 0)
14284 abort ();
14285 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
14286 /* Was PPC64_TLS which sits on insn boundary, now
14287 PPC64_TPREL16_LO which is at low-order half-word. */
14288 rel->r_offset += d_offset;
14289 r_type = R_PPC64_TPREL16_LO;
14290 if (toc_symndx != 0)
14291 {
14292 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
14293 rel->r_addend = toc_addend;
14294 /* We changed the symbol. Start over in order to
14295 get h, sym, sec etc. right. */
14296 goto again;
14297 }
14298 else
14299 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14300 }
14301 break;
14302
14303 case R_PPC64_GOT_TLSGD16_HI:
14304 case R_PPC64_GOT_TLSGD16_HA:
14305 tls_gd = TLS_TPRELGD;
14306 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
14307 goto tls_gdld_hi;
14308 break;
14309
14310 case R_PPC64_GOT_TLSLD16_HI:
14311 case R_PPC64_GOT_TLSLD16_HA:
14312 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
14313 {
14314 tls_gdld_hi:
14315 if ((tls_mask & tls_gd) != 0)
14316 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
14317 + R_PPC64_GOT_TPREL16_DS);
14318 else
14319 {
14320 rel->r_offset -= d_offset;
14321 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
14322 r_type = R_PPC64_NONE;
14323 }
14324 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14325 }
14326 break;
14327
14328 case R_PPC64_GOT_TLSGD16:
14329 case R_PPC64_GOT_TLSGD16_LO:
14330 tls_gd = TLS_TPRELGD;
14331 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
14332 goto tls_ldgd_opt;
14333 break;
14334
14335 case R_PPC64_GOT_TLSLD16:
14336 case R_PPC64_GOT_TLSLD16_LO:
14337 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
14338 {
14339 unsigned int insn1, insn2;
14340 bfd_vma offset;
14341
14342 tls_ldgd_opt:
14343 offset = (bfd_vma) -1;
14344 /* If not using the newer R_PPC64_TLSGD/LD to mark
14345 __tls_get_addr calls, we must trust that the call
14346 stays with its arg setup insns, ie. that the next
14347 reloc is the __tls_get_addr call associated with
14348 the current reloc. Edit both insns. */
14349 if (input_section->has_tls_get_addr_call
14350 && rel + 1 < relend
14351 && branch_reloc_hash_match (input_bfd, rel + 1,
14352 htab->tls_get_addr,
14353 htab->tls_get_addr_fd))
14354 offset = rel[1].r_offset;
14355 /* We read the low GOT_TLS (or TOC16) insn because we
14356 need to keep the destination reg. It may be
14357 something other than the usual r3, and moved to r3
14358 before the call by intervening code. */
14359 insn1 = bfd_get_32 (input_bfd,
14360 contents + rel->r_offset - d_offset);
14361 if ((tls_mask & tls_gd) != 0)
14362 {
14363 /* IE */
14364 insn1 &= (0x1f << 21) | (0x1f << 16);
14365 insn1 |= 58 << 26; /* ld */
14366 insn2 = 0x7c636a14; /* add 3,3,13 */
14367 if (offset != (bfd_vma) -1)
14368 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
14369 if ((tls_mask & TLS_EXPLICIT) == 0)
14370 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
14371 + R_PPC64_GOT_TPREL16_DS);
14372 else
14373 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
14374 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14375 }
14376 else
14377 {
14378 /* LE */
14379 insn1 &= 0x1f << 21;
14380 insn1 |= 0x3c0d0000; /* addis r,13,0 */
14381 insn2 = 0x38630000; /* addi 3,3,0 */
14382 if (tls_gd == 0)
14383 {
14384 /* Was an LD reloc. */
14385 if (toc_symndx)
14386 sec = local_sections[toc_symndx];
14387 for (r_symndx = 0;
14388 r_symndx < symtab_hdr->sh_info;
14389 r_symndx++)
14390 if (local_sections[r_symndx] == sec)
14391 break;
14392 if (r_symndx >= symtab_hdr->sh_info)
14393 r_symndx = STN_UNDEF;
14394 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
14395 if (r_symndx != STN_UNDEF)
14396 rel->r_addend -= (local_syms[r_symndx].st_value
14397 + sec->output_offset
14398 + sec->output_section->vma);
14399 }
14400 else if (toc_symndx != 0)
14401 {
14402 r_symndx = toc_symndx;
14403 rel->r_addend = toc_addend;
14404 }
14405 r_type = R_PPC64_TPREL16_HA;
14406 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14407 if (offset != (bfd_vma) -1)
14408 {
14409 rel[1].r_info = ELF64_R_INFO (r_symndx,
14410 R_PPC64_TPREL16_LO);
14411 rel[1].r_offset = offset + d_offset;
14412 rel[1].r_addend = rel->r_addend;
14413 }
14414 }
14415 bfd_put_32 (input_bfd, insn1,
14416 contents + rel->r_offset - d_offset);
14417 if (offset != (bfd_vma) -1)
14418 bfd_put_32 (input_bfd, insn2, contents + offset);
14419 if ((tls_mask & tls_gd) == 0
14420 && (tls_gd == 0 || toc_symndx != 0))
14421 {
14422 /* We changed the symbol. Start over in order
14423 to get h, sym, sec etc. right. */
14424 goto again;
14425 }
14426 }
14427 break;
14428
14429 case R_PPC64_TLSGD:
14430 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0
14431 && rel + 1 < relend)
14432 {
14433 unsigned int insn2;
14434 bfd_vma offset = rel->r_offset;
14435
14436 if (is_plt_seq_reloc (ELF64_R_TYPE (rel[1].r_info)))
14437 {
14438 bfd_put_32 (output_bfd, NOP, contents + offset);
14439 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
14440 break;
14441 }
14442
14443 if (ELF64_R_TYPE (rel[1].r_info) == R_PPC64_PLTCALL)
14444 bfd_put_32 (output_bfd, NOP, contents + offset + 4);
14445
14446 if ((tls_mask & TLS_TPRELGD) != 0)
14447 {
14448 /* IE */
14449 r_type = R_PPC64_NONE;
14450 insn2 = 0x7c636a14; /* add 3,3,13 */
14451 }
14452 else
14453 {
14454 /* LE */
14455 if (toc_symndx != 0)
14456 {
14457 r_symndx = toc_symndx;
14458 rel->r_addend = toc_addend;
14459 }
14460 r_type = R_PPC64_TPREL16_LO;
14461 rel->r_offset = offset + d_offset;
14462 insn2 = 0x38630000; /* addi 3,3,0 */
14463 }
14464 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14465 /* Zap the reloc on the _tls_get_addr call too. */
14466 BFD_ASSERT (offset == rel[1].r_offset);
14467 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
14468 bfd_put_32 (input_bfd, insn2, contents + offset);
14469 if ((tls_mask & TLS_TPRELGD) == 0 && toc_symndx != 0)
14470 goto again;
14471 }
14472 break;
14473
14474 case R_PPC64_TLSLD:
14475 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0
14476 && rel + 1 < relend)
14477 {
14478 unsigned int insn2;
14479 bfd_vma offset = rel->r_offset;
14480
14481 if (is_plt_seq_reloc (ELF64_R_TYPE (rel[1].r_info)))
14482 {
14483 bfd_put_32 (output_bfd, NOP, contents + offset);
14484 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
14485 break;
14486 }
14487
14488 if (ELF64_R_TYPE (rel[1].r_info) == R_PPC64_PLTCALL)
14489 bfd_put_32 (output_bfd, NOP, contents + offset + 4);
14490
14491 if (toc_symndx)
14492 sec = local_sections[toc_symndx];
14493 for (r_symndx = 0;
14494 r_symndx < symtab_hdr->sh_info;
14495 r_symndx++)
14496 if (local_sections[r_symndx] == sec)
14497 break;
14498 if (r_symndx >= symtab_hdr->sh_info)
14499 r_symndx = STN_UNDEF;
14500 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
14501 if (r_symndx != STN_UNDEF)
14502 rel->r_addend -= (local_syms[r_symndx].st_value
14503 + sec->output_offset
14504 + sec->output_section->vma);
14505
14506 r_type = R_PPC64_TPREL16_LO;
14507 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14508 rel->r_offset = offset + d_offset;
14509 /* Zap the reloc on the _tls_get_addr call too. */
14510 BFD_ASSERT (offset == rel[1].r_offset);
14511 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
14512 insn2 = 0x38630000; /* addi 3,3,0 */
14513 bfd_put_32 (input_bfd, insn2, contents + offset);
14514 goto again;
14515 }
14516 break;
14517
14518 case R_PPC64_DTPMOD64:
14519 if (rel + 1 < relend
14520 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
14521 && rel[1].r_offset == rel->r_offset + 8)
14522 {
14523 if ((tls_mask & TLS_GD) == 0)
14524 {
14525 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
14526 if ((tls_mask & TLS_TPRELGD) != 0)
14527 r_type = R_PPC64_TPREL64;
14528 else
14529 {
14530 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
14531 r_type = R_PPC64_NONE;
14532 }
14533 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14534 }
14535 }
14536 else
14537 {
14538 if ((tls_mask & TLS_LD) == 0)
14539 {
14540 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
14541 r_type = R_PPC64_NONE;
14542 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14543 }
14544 }
14545 break;
14546
14547 case R_PPC64_TPREL64:
14548 if ((tls_mask & TLS_TPREL) == 0)
14549 {
14550 r_type = R_PPC64_NONE;
14551 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14552 }
14553 break;
14554
14555 case R_PPC64_ENTRY:
14556 relocation = TOCstart + htab->sec_info[input_section->id].toc_off;
14557 if (!bfd_link_pic (info)
14558 && !info->traditional_format
14559 && relocation + 0x80008000 <= 0xffffffff)
14560 {
14561 unsigned int insn1, insn2;
14562
14563 insn1 = bfd_get_32 (input_bfd, contents + rel->r_offset);
14564 insn2 = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
14565 if ((insn1 & ~0xfffc) == LD_R2_0R12
14566 && insn2 == ADD_R2_R2_R12)
14567 {
14568 bfd_put_32 (input_bfd,
14569 LIS_R2 + PPC_HA (relocation),
14570 contents + rel->r_offset);
14571 bfd_put_32 (input_bfd,
14572 ADDI_R2_R2 + PPC_LO (relocation),
14573 contents + rel->r_offset + 4);
14574 }
14575 }
14576 else
14577 {
14578 relocation -= (rel->r_offset
14579 + input_section->output_offset
14580 + input_section->output_section->vma);
14581 if (relocation + 0x80008000 <= 0xffffffff)
14582 {
14583 unsigned int insn1, insn2;
14584
14585 insn1 = bfd_get_32 (input_bfd, contents + rel->r_offset);
14586 insn2 = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
14587 if ((insn1 & ~0xfffc) == LD_R2_0R12
14588 && insn2 == ADD_R2_R2_R12)
14589 {
14590 bfd_put_32 (input_bfd,
14591 ADDIS_R2_R12 + PPC_HA (relocation),
14592 contents + rel->r_offset);
14593 bfd_put_32 (input_bfd,
14594 ADDI_R2_R2 + PPC_LO (relocation),
14595 contents + rel->r_offset + 4);
14596 }
14597 }
14598 }
14599 break;
14600
14601 case R_PPC64_REL16_HA:
14602 /* If we are generating a non-PIC executable, edit
14603 . 0: addis 2,12,.TOC.-0b@ha
14604 . addi 2,2,.TOC.-0b@l
14605 used by ELFv2 global entry points to set up r2, to
14606 . lis 2,.TOC.@ha
14607 . addi 2,2,.TOC.@l
14608 if .TOC. is in range. */
14609 if (!bfd_link_pic (info)
14610 && !info->traditional_format
14611 && !htab->opd_abi
14612 && rel->r_addend == d_offset
14613 && h != NULL && &h->elf == htab->elf.hgot
14614 && rel + 1 < relend
14615 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_REL16_LO)
14616 && rel[1].r_offset == rel->r_offset + 4
14617 && rel[1].r_addend == rel->r_addend + 4
14618 && relocation + 0x80008000 <= 0xffffffff)
14619 {
14620 unsigned int insn1, insn2;
14621 bfd_vma offset = rel->r_offset - d_offset;
14622 insn1 = bfd_get_32 (input_bfd, contents + offset);
14623 insn2 = bfd_get_32 (input_bfd, contents + offset + 4);
14624 if ((insn1 & 0xffff0000) == ADDIS_R2_R12
14625 && (insn2 & 0xffff0000) == ADDI_R2_R2)
14626 {
14627 r_type = R_PPC64_ADDR16_HA;
14628 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14629 rel->r_addend -= d_offset;
14630 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_ADDR16_LO);
14631 rel[1].r_addend -= d_offset + 4;
14632 bfd_put_32 (input_bfd, LIS_R2, contents + offset);
14633 }
14634 }
14635 break;
14636 }
14637
14638 /* Handle other relocations that tweak non-addend part of insn. */
14639 insn = 0;
14640 max_br_offset = 1 << 25;
14641 addend = rel->r_addend;
14642 reloc_dest = DEST_NORMAL;
14643 switch (r_type)
14644 {
14645 default:
14646 break;
14647
14648 case R_PPC64_TOCSAVE:
14649 if (relocation + addend == (rel->r_offset
14650 + input_section->output_offset
14651 + input_section->output_section->vma)
14652 && tocsave_find (htab, NO_INSERT,
14653 &local_syms, rel, input_bfd))
14654 {
14655 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
14656 if (insn == NOP
14657 || insn == CROR_151515 || insn == CROR_313131)
14658 bfd_put_32 (input_bfd,
14659 STD_R2_0R1 + STK_TOC (htab),
14660 contents + rel->r_offset);
14661 }
14662 break;
14663
14664 /* Branch taken prediction relocations. */
14665 case R_PPC64_ADDR14_BRTAKEN:
14666 case R_PPC64_REL14_BRTAKEN:
14667 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
14668 /* Fall through. */
14669
14670 /* Branch not taken prediction relocations. */
14671 case R_PPC64_ADDR14_BRNTAKEN:
14672 case R_PPC64_REL14_BRNTAKEN:
14673 insn |= bfd_get_32 (input_bfd,
14674 contents + rel->r_offset) & ~(0x01 << 21);
14675 /* Fall through. */
14676
14677 case R_PPC64_REL14:
14678 max_br_offset = 1 << 15;
14679 /* Fall through. */
14680
14681 case R_PPC64_REL24:
14682 case R_PPC64_PLTCALL:
14683 /* Calls to functions with a different TOC, such as calls to
14684 shared objects, need to alter the TOC pointer. This is
14685 done using a linkage stub. A REL24 branching to these
14686 linkage stubs needs to be followed by a nop, as the nop
14687 will be replaced with an instruction to restore the TOC
14688 base pointer. */
14689 fdh = h;
14690 if (h != NULL
14691 && h->oh != NULL
14692 && h->oh->is_func_descriptor)
14693 fdh = ppc_follow_link (h->oh);
14694 stub_entry = ppc_get_stub_entry (input_section, sec, fdh, &orig_rel,
14695 htab);
14696 if (r_type == R_PPC64_PLTCALL
14697 && stub_entry != NULL
14698 && (stub_entry->stub_type == ppc_stub_plt_call
14699 || stub_entry->stub_type == ppc_stub_plt_call_r2save))
14700 stub_entry = NULL;
14701
14702 if (stub_entry != NULL
14703 && (stub_entry->stub_type == ppc_stub_plt_call
14704 || stub_entry->stub_type == ppc_stub_plt_call_r2save
14705 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
14706 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
14707 {
14708 bfd_boolean can_plt_call = FALSE;
14709
14710 if (stub_entry->stub_type == ppc_stub_plt_call
14711 && !htab->opd_abi
14712 && htab->params->plt_localentry0 != 0
14713 && is_elfv2_localentry0 (&h->elf))
14714 {
14715 /* The function doesn't use or change r2. */
14716 can_plt_call = TRUE;
14717 }
14718
14719 /* All of these stubs may modify r2, so there must be a
14720 branch and link followed by a nop. The nop is
14721 replaced by an insn to restore r2. */
14722 else if (rel->r_offset + 8 <= input_section->size)
14723 {
14724 unsigned long br;
14725
14726 br = bfd_get_32 (input_bfd,
14727 contents + rel->r_offset);
14728 if ((br & 1) != 0)
14729 {
14730 unsigned long nop;
14731
14732 nop = bfd_get_32 (input_bfd,
14733 contents + rel->r_offset + 4);
14734 if (nop == LD_R2_0R1 + STK_TOC (htab))
14735 can_plt_call = TRUE;
14736 else if (nop == NOP
14737 || nop == CROR_151515
14738 || nop == CROR_313131)
14739 {
14740 if (h != NULL
14741 && (h == htab->tls_get_addr_fd
14742 || h == htab->tls_get_addr)
14743 && htab->params->tls_get_addr_opt)
14744 {
14745 /* Special stub used, leave nop alone. */
14746 }
14747 else
14748 bfd_put_32 (input_bfd,
14749 LD_R2_0R1 + STK_TOC (htab),
14750 contents + rel->r_offset + 4);
14751 can_plt_call = TRUE;
14752 }
14753 }
14754 }
14755
14756 if (!can_plt_call && h != NULL)
14757 {
14758 const char *name = h->elf.root.root.string;
14759
14760 if (*name == '.')
14761 ++name;
14762
14763 if (strncmp (name, "__libc_start_main", 17) == 0
14764 && (name[17] == 0 || name[17] == '@'))
14765 {
14766 /* Allow crt1 branch to go via a toc adjusting
14767 stub. Other calls that never return could do
14768 the same, if we could detect such. */
14769 can_plt_call = TRUE;
14770 }
14771 }
14772
14773 if (!can_plt_call)
14774 {
14775 /* g++ as of 20130507 emits self-calls without a
14776 following nop. This is arguably wrong since we
14777 have conflicting information. On the one hand a
14778 global symbol and on the other a local call
14779 sequence, but don't error for this special case.
14780 It isn't possible to cheaply verify we have
14781 exactly such a call. Allow all calls to the same
14782 section. */
14783 asection *code_sec = sec;
14784
14785 if (get_opd_info (sec) != NULL)
14786 {
14787 bfd_vma off = (relocation + addend
14788 - sec->output_section->vma
14789 - sec->output_offset);
14790
14791 opd_entry_value (sec, off, &code_sec, NULL, FALSE);
14792 }
14793 if (code_sec == input_section)
14794 can_plt_call = TRUE;
14795 }
14796
14797 if (!can_plt_call)
14798 {
14799 if (stub_entry->stub_type == ppc_stub_plt_call
14800 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14801 info->callbacks->einfo
14802 /* xgettext:c-format */
14803 (_("%H: call to `%pT' lacks nop, can't restore toc; "
14804 "recompile with -fPIC\n"),
14805 input_bfd, input_section, rel->r_offset, sym_name);
14806 else
14807 info->callbacks->einfo
14808 /* xgettext:c-format */
14809 (_("%H: call to `%pT' lacks nop, can't restore toc; "
14810 "(-mcmodel=small toc adjust stub)\n"),
14811 input_bfd, input_section, rel->r_offset, sym_name);
14812
14813 bfd_set_error (bfd_error_bad_value);
14814 ret = FALSE;
14815 }
14816
14817 if (can_plt_call
14818 && (stub_entry->stub_type == ppc_stub_plt_call
14819 || stub_entry->stub_type == ppc_stub_plt_call_r2save))
14820 unresolved_reloc = FALSE;
14821 }
14822
14823 if ((stub_entry == NULL
14824 || stub_entry->stub_type == ppc_stub_long_branch
14825 || stub_entry->stub_type == ppc_stub_plt_branch)
14826 && get_opd_info (sec) != NULL)
14827 {
14828 /* The branch destination is the value of the opd entry. */
14829 bfd_vma off = (relocation + addend
14830 - sec->output_section->vma
14831 - sec->output_offset);
14832 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL, FALSE);
14833 if (dest != (bfd_vma) -1)
14834 {
14835 relocation = dest;
14836 addend = 0;
14837 reloc_dest = DEST_OPD;
14838 }
14839 }
14840
14841 /* If the branch is out of reach we ought to have a long
14842 branch stub. */
14843 from = (rel->r_offset
14844 + input_section->output_offset
14845 + input_section->output_section->vma);
14846
14847 relocation += PPC64_LOCAL_ENTRY_OFFSET (fdh
14848 ? fdh->elf.other
14849 : sym->st_other);
14850
14851 if (stub_entry != NULL
14852 && (stub_entry->stub_type == ppc_stub_long_branch
14853 || stub_entry->stub_type == ppc_stub_plt_branch)
14854 && (r_type == R_PPC64_ADDR14_BRTAKEN
14855 || r_type == R_PPC64_ADDR14_BRNTAKEN
14856 || (relocation + addend - from + max_br_offset
14857 < 2 * max_br_offset)))
14858 /* Don't use the stub if this branch is in range. */
14859 stub_entry = NULL;
14860
14861 if (stub_entry != NULL)
14862 {
14863 /* Munge up the value and addend so that we call the stub
14864 rather than the procedure directly. */
14865 asection *stub_sec = stub_entry->group->stub_sec;
14866
14867 if (stub_entry->stub_type == ppc_stub_save_res)
14868 relocation += (stub_sec->output_offset
14869 + stub_sec->output_section->vma
14870 + stub_sec->size - htab->sfpr->size
14871 - htab->sfpr->output_offset
14872 - htab->sfpr->output_section->vma);
14873 else
14874 relocation = (stub_entry->stub_offset
14875 + stub_sec->output_offset
14876 + stub_sec->output_section->vma);
14877 addend = 0;
14878 reloc_dest = DEST_STUB;
14879
14880 if ((stub_entry->stub_type == ppc_stub_plt_call
14881 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14882 && (ALWAYS_EMIT_R2SAVE
14883 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14884 && rel + 1 < relend
14885 && rel[1].r_offset == rel->r_offset + 4
14886 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOCSAVE)
14887 relocation += 4;
14888 }
14889
14890 if (insn != 0)
14891 {
14892 if (is_isa_v2)
14893 {
14894 /* Set 'a' bit. This is 0b00010 in BO field for branch
14895 on CR(BI) insns (BO == 001at or 011at), and 0b01000
14896 for branch on CTR insns (BO == 1a00t or 1a01t). */
14897 if ((insn & (0x14 << 21)) == (0x04 << 21))
14898 insn |= 0x02 << 21;
14899 else if ((insn & (0x14 << 21)) == (0x10 << 21))
14900 insn |= 0x08 << 21;
14901 else
14902 break;
14903 }
14904 else
14905 {
14906 /* Invert 'y' bit if not the default. */
14907 if ((bfd_signed_vma) (relocation + addend - from) < 0)
14908 insn ^= 0x01 << 21;
14909 }
14910
14911 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
14912 }
14913
14914 /* NOP out calls to undefined weak functions.
14915 We can thus call a weak function without first
14916 checking whether the function is defined. */
14917 else if (h != NULL
14918 && h->elf.root.type == bfd_link_hash_undefweak
14919 && h->elf.dynindx == -1
14920 && r_type == R_PPC64_REL24
14921 && relocation == 0
14922 && addend == 0)
14923 {
14924 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
14925 goto copy_reloc;
14926 }
14927 break;
14928 }
14929
14930 /* Set `addend'. */
14931 tls_type = 0;
14932 save_unresolved_reloc = unresolved_reloc;
14933 switch (r_type)
14934 {
14935 default:
14936 /* xgettext:c-format */
14937 _bfd_error_handler (_("%pB: %s unsupported"),
14938 input_bfd, ppc64_elf_howto_table[r_type]->name);
14939
14940 bfd_set_error (bfd_error_bad_value);
14941 ret = FALSE;
14942 goto copy_reloc;
14943
14944 case R_PPC64_NONE:
14945 case R_PPC64_TLS:
14946 case R_PPC64_TLSGD:
14947 case R_PPC64_TLSLD:
14948 case R_PPC64_TOCSAVE:
14949 case R_PPC64_GNU_VTINHERIT:
14950 case R_PPC64_GNU_VTENTRY:
14951 case R_PPC64_ENTRY:
14952 goto copy_reloc;
14953
14954 /* GOT16 relocations. Like an ADDR16 using the symbol's
14955 address in the GOT as relocation value instead of the
14956 symbol's value itself. Also, create a GOT entry for the
14957 symbol and put the symbol value there. */
14958 case R_PPC64_GOT_TLSGD16:
14959 case R_PPC64_GOT_TLSGD16_LO:
14960 case R_PPC64_GOT_TLSGD16_HI:
14961 case R_PPC64_GOT_TLSGD16_HA:
14962 tls_type = TLS_TLS | TLS_GD;
14963 goto dogot;
14964
14965 case R_PPC64_GOT_TLSLD16:
14966 case R_PPC64_GOT_TLSLD16_LO:
14967 case R_PPC64_GOT_TLSLD16_HI:
14968 case R_PPC64_GOT_TLSLD16_HA:
14969 tls_type = TLS_TLS | TLS_LD;
14970 goto dogot;
14971
14972 case R_PPC64_GOT_TPREL16_DS:
14973 case R_PPC64_GOT_TPREL16_LO_DS:
14974 case R_PPC64_GOT_TPREL16_HI:
14975 case R_PPC64_GOT_TPREL16_HA:
14976 tls_type = TLS_TLS | TLS_TPREL;
14977 goto dogot;
14978
14979 case R_PPC64_GOT_DTPREL16_DS:
14980 case R_PPC64_GOT_DTPREL16_LO_DS:
14981 case R_PPC64_GOT_DTPREL16_HI:
14982 case R_PPC64_GOT_DTPREL16_HA:
14983 tls_type = TLS_TLS | TLS_DTPREL;
14984 goto dogot;
14985
14986 case R_PPC64_GOT16:
14987 case R_PPC64_GOT16_LO:
14988 case R_PPC64_GOT16_HI:
14989 case R_PPC64_GOT16_HA:
14990 case R_PPC64_GOT16_DS:
14991 case R_PPC64_GOT16_LO_DS:
14992 dogot:
14993 {
14994 /* Relocation is to the entry for this symbol in the global
14995 offset table. */
14996 asection *got;
14997 bfd_vma *offp;
14998 bfd_vma off;
14999 unsigned long indx = 0;
15000 struct got_entry *ent;
15001
15002 if (tls_type == (TLS_TLS | TLS_LD)
15003 && (h == NULL
15004 || !h->elf.def_dynamic))
15005 ent = ppc64_tlsld_got (input_bfd);
15006 else
15007 {
15008 if (h != NULL)
15009 {
15010 if (!htab->elf.dynamic_sections_created
15011 || h->elf.dynindx == -1
15012 || SYMBOL_REFERENCES_LOCAL (info, &h->elf)
15013 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, &h->elf))
15014 /* This is actually a static link, or it is a
15015 -Bsymbolic link and the symbol is defined
15016 locally, or the symbol was forced to be local
15017 because of a version file. */
15018 ;
15019 else
15020 {
15021 indx = h->elf.dynindx;
15022 unresolved_reloc = FALSE;
15023 }
15024 ent = h->elf.got.glist;
15025 }
15026 else
15027 {
15028 if (local_got_ents == NULL)
15029 abort ();
15030 ent = local_got_ents[r_symndx];
15031 }
15032
15033 for (; ent != NULL; ent = ent->next)
15034 if (ent->addend == orig_rel.r_addend
15035 && ent->owner == input_bfd
15036 && ent->tls_type == tls_type)
15037 break;
15038 }
15039
15040 if (ent == NULL)
15041 abort ();
15042 if (ent->is_indirect)
15043 ent = ent->got.ent;
15044 offp = &ent->got.offset;
15045 got = ppc64_elf_tdata (ent->owner)->got;
15046 if (got == NULL)
15047 abort ();
15048
15049 /* The offset must always be a multiple of 8. We use the
15050 least significant bit to record whether we have already
15051 processed this entry. */
15052 off = *offp;
15053 if ((off & 1) != 0)
15054 off &= ~1;
15055 else
15056 {
15057 /* Generate relocs for the dynamic linker, except in
15058 the case of TLSLD where we'll use one entry per
15059 module. */
15060 asection *relgot;
15061 bfd_boolean ifunc;
15062
15063 *offp = off | 1;
15064 relgot = NULL;
15065 ifunc = (h != NULL
15066 ? h->elf.type == STT_GNU_IFUNC
15067 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC);
15068 if (ifunc)
15069 {
15070 relgot = htab->elf.irelplt;
15071 if (indx == 0)
15072 htab->local_ifunc_resolver = 1;
15073 else if (is_static_defined (&h->elf))
15074 htab->maybe_local_ifunc_resolver = 1;
15075 }
15076 else if (indx != 0
15077 || (bfd_link_pic (info)
15078 && (h == NULL
15079 || !UNDEFWEAK_NO_DYNAMIC_RELOC (info, &h->elf)
15080 || (tls_type == (TLS_TLS | TLS_LD)
15081 && !h->elf.def_dynamic))
15082 && !(tls_type == (TLS_TLS | TLS_TPREL)
15083 && bfd_link_executable (info)
15084 && SYMBOL_REFERENCES_LOCAL (info, &h->elf))))
15085 relgot = ppc64_elf_tdata (ent->owner)->relgot;
15086 if (relgot != NULL)
15087 {
15088 outrel.r_offset = (got->output_section->vma
15089 + got->output_offset
15090 + off);
15091 outrel.r_addend = addend;
15092 if (tls_type & (TLS_LD | TLS_GD))
15093 {
15094 outrel.r_addend = 0;
15095 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
15096 if (tls_type == (TLS_TLS | TLS_GD))
15097 {
15098 loc = relgot->contents;
15099 loc += (relgot->reloc_count++
15100 * sizeof (Elf64_External_Rela));
15101 bfd_elf64_swap_reloca_out (output_bfd,
15102 &outrel, loc);
15103 outrel.r_offset += 8;
15104 outrel.r_addend = addend;
15105 outrel.r_info
15106 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
15107 }
15108 }
15109 else if (tls_type == (TLS_TLS | TLS_DTPREL))
15110 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
15111 else if (tls_type == (TLS_TLS | TLS_TPREL))
15112 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
15113 else if (indx != 0)
15114 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
15115 else
15116 {
15117 if (ifunc)
15118 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
15119 else
15120 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
15121
15122 /* Write the .got section contents for the sake
15123 of prelink. */
15124 loc = got->contents + off;
15125 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
15126 loc);
15127 }
15128
15129 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
15130 {
15131 outrel.r_addend += relocation;
15132 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
15133 {
15134 if (htab->elf.tls_sec == NULL)
15135 outrel.r_addend = 0;
15136 else
15137 outrel.r_addend -= htab->elf.tls_sec->vma;
15138 }
15139 }
15140 loc = relgot->contents;
15141 loc += (relgot->reloc_count++
15142 * sizeof (Elf64_External_Rela));
15143 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
15144 }
15145
15146 /* Init the .got section contents here if we're not
15147 emitting a reloc. */
15148 else
15149 {
15150 relocation += addend;
15151 if (tls_type != 0)
15152 {
15153 if (htab->elf.tls_sec == NULL)
15154 relocation = 0;
15155 else
15156 {
15157 if (tls_type & TLS_LD)
15158 relocation = 0;
15159 else
15160 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
15161 if (tls_type & TLS_TPREL)
15162 relocation += DTP_OFFSET - TP_OFFSET;
15163 }
15164
15165 if (tls_type & (TLS_GD | TLS_LD))
15166 {
15167 bfd_put_64 (output_bfd, relocation,
15168 got->contents + off + 8);
15169 relocation = 1;
15170 }
15171 }
15172 bfd_put_64 (output_bfd, relocation,
15173 got->contents + off);
15174 }
15175 }
15176
15177 if (off >= (bfd_vma) -2)
15178 abort ();
15179
15180 relocation = got->output_section->vma + got->output_offset + off;
15181 addend = -(TOCstart + htab->sec_info[input_section->id].toc_off);
15182 }
15183 break;
15184
15185 case R_PPC64_PLT16_HA:
15186 case R_PPC64_PLT16_HI:
15187 case R_PPC64_PLT16_LO:
15188 case R_PPC64_PLT16_LO_DS:
15189 case R_PPC64_PLT32:
15190 case R_PPC64_PLT64:
15191 case R_PPC64_PLTSEQ:
15192 case R_PPC64_PLTCALL:
15193 /* Relocation is to the entry for this symbol in the
15194 procedure linkage table. */
15195 unresolved_reloc = TRUE;
15196 {
15197 struct plt_entry **plt_list = NULL;
15198 if (h != NULL)
15199 plt_list = &h->elf.plt.plist;
15200 else if (local_got_ents != NULL)
15201 {
15202 struct plt_entry **local_plt = (struct plt_entry **)
15203 (local_got_ents + symtab_hdr->sh_info);
15204 plt_list = local_plt + r_symndx;
15205 }
15206 if (plt_list)
15207 {
15208 struct plt_entry *ent;
15209
15210 for (ent = *plt_list; ent != NULL; ent = ent->next)
15211 if (ent->plt.offset != (bfd_vma) -1
15212 && ent->addend == orig_rel.r_addend)
15213 {
15214 asection *plt;
15215 bfd_vma got;
15216
15217 plt = htab->elf.splt;
15218 if (!htab->elf.dynamic_sections_created
15219 || h == NULL
15220 || h->elf.dynindx == -1)
15221 {
15222 if (h != NULL
15223 ? h->elf.type == STT_GNU_IFUNC
15224 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
15225 plt = htab->elf.iplt;
15226 else
15227 plt = htab->pltlocal;
15228 }
15229 relocation = (plt->output_section->vma
15230 + plt->output_offset
15231 + ent->plt.offset);
15232 if (r_type == R_PPC64_PLT16_HA
15233 || r_type ==R_PPC64_PLT16_HI
15234 || r_type ==R_PPC64_PLT16_LO
15235 || r_type ==R_PPC64_PLT16_LO_DS)
15236 {
15237 got = (elf_gp (output_bfd)
15238 + htab->sec_info[input_section->id].toc_off);
15239 relocation -= got;
15240 }
15241 addend = 0;
15242 unresolved_reloc = FALSE;
15243 break;
15244 }
15245 }
15246 }
15247 break;
15248
15249 case R_PPC64_TOC:
15250 /* Relocation value is TOC base. */
15251 relocation = TOCstart;
15252 if (r_symndx == STN_UNDEF)
15253 relocation += htab->sec_info[input_section->id].toc_off;
15254 else if (unresolved_reloc)
15255 ;
15256 else if (sec != NULL && sec->id < htab->sec_info_arr_size)
15257 relocation += htab->sec_info[sec->id].toc_off;
15258 else
15259 unresolved_reloc = TRUE;
15260 goto dodyn;
15261
15262 /* TOC16 relocs. We want the offset relative to the TOC base,
15263 which is the address of the start of the TOC plus 0x8000.
15264 The TOC consists of sections .got, .toc, .tocbss, and .plt,
15265 in this order. */
15266 case R_PPC64_TOC16:
15267 case R_PPC64_TOC16_LO:
15268 case R_PPC64_TOC16_HI:
15269 case R_PPC64_TOC16_DS:
15270 case R_PPC64_TOC16_LO_DS:
15271 case R_PPC64_TOC16_HA:
15272 addend -= TOCstart + htab->sec_info[input_section->id].toc_off;
15273 break;
15274
15275 /* Relocate against the beginning of the section. */
15276 case R_PPC64_SECTOFF:
15277 case R_PPC64_SECTOFF_LO:
15278 case R_PPC64_SECTOFF_HI:
15279 case R_PPC64_SECTOFF_DS:
15280 case R_PPC64_SECTOFF_LO_DS:
15281 case R_PPC64_SECTOFF_HA:
15282 if (sec != NULL)
15283 addend -= sec->output_section->vma;
15284 break;
15285
15286 case R_PPC64_REL16:
15287 case R_PPC64_REL16_LO:
15288 case R_PPC64_REL16_HI:
15289 case R_PPC64_REL16_HA:
15290 case R_PPC64_REL16DX_HA:
15291 break;
15292
15293 case R_PPC64_REL14:
15294 case R_PPC64_REL14_BRNTAKEN:
15295 case R_PPC64_REL14_BRTAKEN:
15296 case R_PPC64_REL24:
15297 break;
15298
15299 case R_PPC64_TPREL16:
15300 case R_PPC64_TPREL16_LO:
15301 case R_PPC64_TPREL16_HI:
15302 case R_PPC64_TPREL16_HA:
15303 case R_PPC64_TPREL16_DS:
15304 case R_PPC64_TPREL16_LO_DS:
15305 case R_PPC64_TPREL16_HIGH:
15306 case R_PPC64_TPREL16_HIGHA:
15307 case R_PPC64_TPREL16_HIGHER:
15308 case R_PPC64_TPREL16_HIGHERA:
15309 case R_PPC64_TPREL16_HIGHEST:
15310 case R_PPC64_TPREL16_HIGHESTA:
15311 if (h != NULL
15312 && h->elf.root.type == bfd_link_hash_undefweak
15313 && h->elf.dynindx == -1)
15314 {
15315 /* Make this relocation against an undefined weak symbol
15316 resolve to zero. This is really just a tweak, since
15317 code using weak externs ought to check that they are
15318 defined before using them. */
15319 bfd_byte *p = contents + rel->r_offset - d_offset;
15320
15321 insn = bfd_get_32 (input_bfd, p);
15322 insn = _bfd_elf_ppc_at_tprel_transform (insn, 13);
15323 if (insn != 0)
15324 bfd_put_32 (input_bfd, insn, p);
15325 break;
15326 }
15327 if (htab->elf.tls_sec != NULL)
15328 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
15329 /* The TPREL16 relocs shouldn't really be used in shared
15330 libs or with non-local symbols as that will result in
15331 DT_TEXTREL being set, but support them anyway. */
15332 goto dodyn;
15333
15334 case R_PPC64_DTPREL16:
15335 case R_PPC64_DTPREL16_LO:
15336 case R_PPC64_DTPREL16_HI:
15337 case R_PPC64_DTPREL16_HA:
15338 case R_PPC64_DTPREL16_DS:
15339 case R_PPC64_DTPREL16_LO_DS:
15340 case R_PPC64_DTPREL16_HIGH:
15341 case R_PPC64_DTPREL16_HIGHA:
15342 case R_PPC64_DTPREL16_HIGHER:
15343 case R_PPC64_DTPREL16_HIGHERA:
15344 case R_PPC64_DTPREL16_HIGHEST:
15345 case R_PPC64_DTPREL16_HIGHESTA:
15346 if (htab->elf.tls_sec != NULL)
15347 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
15348 break;
15349
15350 case R_PPC64_ADDR64_LOCAL:
15351 addend += PPC64_LOCAL_ENTRY_OFFSET (h != NULL
15352 ? h->elf.other
15353 : sym->st_other);
15354 break;
15355
15356 case R_PPC64_DTPMOD64:
15357 relocation = 1;
15358 addend = 0;
15359 goto dodyn;
15360
15361 case R_PPC64_TPREL64:
15362 if (htab->elf.tls_sec != NULL)
15363 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
15364 goto dodyn;
15365
15366 case R_PPC64_DTPREL64:
15367 if (htab->elf.tls_sec != NULL)
15368 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
15369 /* Fall through. */
15370
15371 /* Relocations that may need to be propagated if this is a
15372 dynamic object. */
15373 case R_PPC64_REL30:
15374 case R_PPC64_REL32:
15375 case R_PPC64_REL64:
15376 case R_PPC64_ADDR14:
15377 case R_PPC64_ADDR14_BRNTAKEN:
15378 case R_PPC64_ADDR14_BRTAKEN:
15379 case R_PPC64_ADDR16:
15380 case R_PPC64_ADDR16_DS:
15381 case R_PPC64_ADDR16_HA:
15382 case R_PPC64_ADDR16_HI:
15383 case R_PPC64_ADDR16_HIGH:
15384 case R_PPC64_ADDR16_HIGHA:
15385 case R_PPC64_ADDR16_HIGHER:
15386 case R_PPC64_ADDR16_HIGHERA:
15387 case R_PPC64_ADDR16_HIGHEST:
15388 case R_PPC64_ADDR16_HIGHESTA:
15389 case R_PPC64_ADDR16_LO:
15390 case R_PPC64_ADDR16_LO_DS:
15391 case R_PPC64_ADDR24:
15392 case R_PPC64_ADDR32:
15393 case R_PPC64_ADDR64:
15394 case R_PPC64_UADDR16:
15395 case R_PPC64_UADDR32:
15396 case R_PPC64_UADDR64:
15397 dodyn:
15398 if ((input_section->flags & SEC_ALLOC) == 0)
15399 break;
15400
15401 if (NO_OPD_RELOCS && is_opd)
15402 break;
15403
15404 if (bfd_link_pic (info)
15405 ? ((h == NULL
15406 || h->dyn_relocs != NULL)
15407 && ((h != NULL && pc_dynrelocs (h))
15408 || must_be_dyn_reloc (info, r_type)))
15409 : (h != NULL
15410 ? h->dyn_relocs != NULL
15411 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
15412 {
15413 bfd_boolean skip, relocate;
15414 asection *sreloc;
15415 bfd_vma out_off;
15416 long indx = 0;
15417
15418 /* When generating a dynamic object, these relocations
15419 are copied into the output file to be resolved at run
15420 time. */
15421
15422 skip = FALSE;
15423 relocate = FALSE;
15424
15425 out_off = _bfd_elf_section_offset (output_bfd, info,
15426 input_section, rel->r_offset);
15427 if (out_off == (bfd_vma) -1)
15428 skip = TRUE;
15429 else if (out_off == (bfd_vma) -2)
15430 skip = TRUE, relocate = TRUE;
15431 out_off += (input_section->output_section->vma
15432 + input_section->output_offset);
15433 outrel.r_offset = out_off;
15434 outrel.r_addend = rel->r_addend;
15435
15436 /* Optimize unaligned reloc use. */
15437 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
15438 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
15439 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
15440 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
15441 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
15442 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
15443 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
15444 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
15445 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
15446
15447 if (skip)
15448 memset (&outrel, 0, sizeof outrel);
15449 else if (!SYMBOL_REFERENCES_LOCAL (info, &h->elf)
15450 && !is_opd
15451 && r_type != R_PPC64_TOC)
15452 {
15453 indx = h->elf.dynindx;
15454 BFD_ASSERT (indx != -1);
15455 outrel.r_info = ELF64_R_INFO (indx, r_type);
15456 }
15457 else
15458 {
15459 /* This symbol is local, or marked to become local,
15460 or this is an opd section reloc which must point
15461 at a local function. */
15462 outrel.r_addend += relocation;
15463 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
15464 {
15465 if (is_opd && h != NULL)
15466 {
15467 /* Lie about opd entries. This case occurs
15468 when building shared libraries and we
15469 reference a function in another shared
15470 lib. The same thing happens for a weak
15471 definition in an application that's
15472 overridden by a strong definition in a
15473 shared lib. (I believe this is a generic
15474 bug in binutils handling of weak syms.)
15475 In these cases we won't use the opd
15476 entry in this lib. */
15477 unresolved_reloc = FALSE;
15478 }
15479 if (!is_opd
15480 && r_type == R_PPC64_ADDR64
15481 && (h != NULL
15482 ? h->elf.type == STT_GNU_IFUNC
15483 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
15484 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
15485 else
15486 {
15487 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
15488
15489 /* We need to relocate .opd contents for ld.so.
15490 Prelink also wants simple and consistent rules
15491 for relocs. This make all RELATIVE relocs have
15492 *r_offset equal to r_addend. */
15493 relocate = TRUE;
15494 }
15495 }
15496 else
15497 {
15498 if (h != NULL
15499 ? h->elf.type == STT_GNU_IFUNC
15500 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
15501 {
15502 info->callbacks->einfo
15503 /* xgettext:c-format */
15504 (_("%H: %s for indirect "
15505 "function `%pT' unsupported\n"),
15506 input_bfd, input_section, rel->r_offset,
15507 ppc64_elf_howto_table[r_type]->name,
15508 sym_name);
15509 ret = FALSE;
15510 }
15511 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
15512 ;
15513 else if (sec == NULL || sec->owner == NULL)
15514 {
15515 bfd_set_error (bfd_error_bad_value);
15516 return FALSE;
15517 }
15518 else
15519 {
15520 asection *osec;
15521
15522 osec = sec->output_section;
15523 indx = elf_section_data (osec)->dynindx;
15524
15525 if (indx == 0)
15526 {
15527 if ((osec->flags & SEC_READONLY) == 0
15528 && htab->elf.data_index_section != NULL)
15529 osec = htab->elf.data_index_section;
15530 else
15531 osec = htab->elf.text_index_section;
15532 indx = elf_section_data (osec)->dynindx;
15533 }
15534 BFD_ASSERT (indx != 0);
15535
15536 /* We are turning this relocation into one
15537 against a section symbol, so subtract out
15538 the output section's address but not the
15539 offset of the input section in the output
15540 section. */
15541 outrel.r_addend -= osec->vma;
15542 }
15543
15544 outrel.r_info = ELF64_R_INFO (indx, r_type);
15545 }
15546 }
15547
15548 sreloc = elf_section_data (input_section)->sreloc;
15549 if (h != NULL
15550 ? h->elf.type == STT_GNU_IFUNC
15551 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
15552 {
15553 sreloc = htab->elf.irelplt;
15554 if (indx == 0)
15555 htab->local_ifunc_resolver = 1;
15556 else if (is_static_defined (&h->elf))
15557 htab->maybe_local_ifunc_resolver = 1;
15558 }
15559 if (sreloc == NULL)
15560 abort ();
15561
15562 if (sreloc->reloc_count * sizeof (Elf64_External_Rela)
15563 >= sreloc->size)
15564 abort ();
15565 loc = sreloc->contents;
15566 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
15567 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
15568
15569 /* If this reloc is against an external symbol, it will
15570 be computed at runtime, so there's no need to do
15571 anything now. However, for the sake of prelink ensure
15572 that the section contents are a known value. */
15573 if (! relocate)
15574 {
15575 unresolved_reloc = FALSE;
15576 /* The value chosen here is quite arbitrary as ld.so
15577 ignores section contents except for the special
15578 case of .opd where the contents might be accessed
15579 before relocation. Choose zero, as that won't
15580 cause reloc overflow. */
15581 relocation = 0;
15582 addend = 0;
15583 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
15584 to improve backward compatibility with older
15585 versions of ld. */
15586 if (r_type == R_PPC64_ADDR64)
15587 addend = outrel.r_addend;
15588 /* Adjust pc_relative relocs to have zero in *r_offset. */
15589 else if (ppc64_elf_howto_table[r_type]->pc_relative)
15590 addend = outrel.r_offset;
15591 }
15592 }
15593 break;
15594
15595 case R_PPC64_COPY:
15596 case R_PPC64_GLOB_DAT:
15597 case R_PPC64_JMP_SLOT:
15598 case R_PPC64_JMP_IREL:
15599 case R_PPC64_RELATIVE:
15600 /* We shouldn't ever see these dynamic relocs in relocatable
15601 files. */
15602 /* Fall through. */
15603
15604 case R_PPC64_PLTGOT16:
15605 case R_PPC64_PLTGOT16_DS:
15606 case R_PPC64_PLTGOT16_HA:
15607 case R_PPC64_PLTGOT16_HI:
15608 case R_PPC64_PLTGOT16_LO:
15609 case R_PPC64_PLTGOT16_LO_DS:
15610 case R_PPC64_PLTREL32:
15611 case R_PPC64_PLTREL64:
15612 /* These ones haven't been implemented yet. */
15613
15614 info->callbacks->einfo
15615 /* xgettext:c-format */
15616 (_("%P: %pB: %s is not supported for `%pT'\n"),
15617 input_bfd,
15618 ppc64_elf_howto_table[r_type]->name, sym_name);
15619
15620 bfd_set_error (bfd_error_invalid_operation);
15621 ret = FALSE;
15622 goto copy_reloc;
15623 }
15624
15625 /* Multi-instruction sequences that access the TOC can be
15626 optimized, eg. addis ra,r2,0; addi rb,ra,x;
15627 to nop; addi rb,r2,x; */
15628 switch (r_type)
15629 {
15630 default:
15631 break;
15632
15633 case R_PPC64_GOT_TLSLD16_HI:
15634 case R_PPC64_GOT_TLSGD16_HI:
15635 case R_PPC64_GOT_TPREL16_HI:
15636 case R_PPC64_GOT_DTPREL16_HI:
15637 case R_PPC64_GOT16_HI:
15638 case R_PPC64_TOC16_HI:
15639 /* These relocs would only be useful if building up an
15640 offset to later add to r2, perhaps in an indexed
15641 addressing mode instruction. Don't try to optimize.
15642 Unfortunately, the possibility of someone building up an
15643 offset like this or even with the HA relocs, means that
15644 we need to check the high insn when optimizing the low
15645 insn. */
15646 break;
15647
15648 case R_PPC64_PLTCALL:
15649 if (unresolved_reloc)
15650 {
15651 /* No plt entry. Make this into a direct call. */
15652 bfd_byte *p = contents + rel->r_offset;
15653 insn = bfd_get_32 (input_bfd, p);
15654 insn &= 1;
15655 bfd_put_32 (input_bfd, B_DOT | insn, p);
15656 bfd_put_32 (input_bfd, NOP, p + 4);
15657 unresolved_reloc = save_unresolved_reloc;
15658 r_type = R_PPC64_REL24;
15659 }
15660 break;
15661
15662 case R_PPC64_PLTSEQ:
15663 if (unresolved_reloc)
15664 {
15665 unresolved_reloc = FALSE;
15666 goto nop_it;
15667 }
15668 break;
15669
15670 case R_PPC64_PLT16_HA:
15671 if (unresolved_reloc)
15672 {
15673 unresolved_reloc = FALSE;
15674 goto nop_it;
15675 }
15676 /* Fall through. */
15677 case R_PPC64_GOT_TLSLD16_HA:
15678 case R_PPC64_GOT_TLSGD16_HA:
15679 case R_PPC64_GOT_TPREL16_HA:
15680 case R_PPC64_GOT_DTPREL16_HA:
15681 case R_PPC64_GOT16_HA:
15682 case R_PPC64_TOC16_HA:
15683 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
15684 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
15685 {
15686 bfd_byte *p;
15687 nop_it:
15688 p = contents + (rel->r_offset & ~3);
15689 bfd_put_32 (input_bfd, NOP, p);
15690 goto copy_reloc;
15691 }
15692 break;
15693
15694 case R_PPC64_PLT16_LO:
15695 case R_PPC64_PLT16_LO_DS:
15696 if (unresolved_reloc)
15697 {
15698 unresolved_reloc = FALSE;
15699 goto nop_it;
15700 }
15701 /* Fall through. */
15702 case R_PPC64_GOT_TLSLD16_LO:
15703 case R_PPC64_GOT_TLSGD16_LO:
15704 case R_PPC64_GOT_TPREL16_LO_DS:
15705 case R_PPC64_GOT_DTPREL16_LO_DS:
15706 case R_PPC64_GOT16_LO:
15707 case R_PPC64_GOT16_LO_DS:
15708 case R_PPC64_TOC16_LO:
15709 case R_PPC64_TOC16_LO_DS:
15710 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
15711 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
15712 {
15713 bfd_byte *p = contents + (rel->r_offset & ~3);
15714 insn = bfd_get_32 (input_bfd, p);
15715 if ((insn & (0x3f << 26)) == 12u << 26 /* addic */)
15716 {
15717 /* Transform addic to addi when we change reg. */
15718 insn &= ~((0x3f << 26) | (0x1f << 16));
15719 insn |= (14u << 26) | (2 << 16);
15720 }
15721 else
15722 {
15723 insn &= ~(0x1f << 16);
15724 insn |= 2 << 16;
15725 }
15726 bfd_put_32 (input_bfd, insn, p);
15727 }
15728 break;
15729
15730 case R_PPC64_TPREL16_HA:
15731 if (htab->do_tls_opt && relocation + addend + 0x8000 < 0x10000)
15732 {
15733 bfd_byte *p = contents + (rel->r_offset & ~3);
15734 insn = bfd_get_32 (input_bfd, p);
15735 if ((insn & ((0x3f << 26) | 0x1f << 16))
15736 != ((15u << 26) | (13 << 16)) /* addis rt,13,imm */)
15737 /* xgettext:c-format */
15738 info->callbacks->minfo
15739 (_("%H: warning: %s unexpected insn %#x.\n"),
15740 input_bfd, input_section, rel->r_offset,
15741 ppc64_elf_howto_table[r_type]->name, insn);
15742 else
15743 {
15744 bfd_put_32 (input_bfd, NOP, p);
15745 goto copy_reloc;
15746 }
15747 }
15748 break;
15749
15750 case R_PPC64_TPREL16_LO:
15751 case R_PPC64_TPREL16_LO_DS:
15752 if (htab->do_tls_opt && relocation + addend + 0x8000 < 0x10000)
15753 {
15754 bfd_byte *p = contents + (rel->r_offset & ~3);
15755 insn = bfd_get_32 (input_bfd, p);
15756 insn &= ~(0x1f << 16);
15757 insn |= 13 << 16;
15758 bfd_put_32 (input_bfd, insn, p);
15759 }
15760 break;
15761 }
15762
15763 /* Do any further special processing. */
15764 switch (r_type)
15765 {
15766 default:
15767 break;
15768
15769 case R_PPC64_REL16_HA:
15770 case R_PPC64_REL16DX_HA:
15771 case R_PPC64_ADDR16_HA:
15772 case R_PPC64_ADDR16_HIGHA:
15773 case R_PPC64_ADDR16_HIGHERA:
15774 case R_PPC64_ADDR16_HIGHESTA:
15775 case R_PPC64_TOC16_HA:
15776 case R_PPC64_SECTOFF_HA:
15777 case R_PPC64_TPREL16_HA:
15778 case R_PPC64_TPREL16_HIGHA:
15779 case R_PPC64_TPREL16_HIGHERA:
15780 case R_PPC64_TPREL16_HIGHESTA:
15781 case R_PPC64_DTPREL16_HA:
15782 case R_PPC64_DTPREL16_HIGHA:
15783 case R_PPC64_DTPREL16_HIGHERA:
15784 case R_PPC64_DTPREL16_HIGHESTA:
15785 /* It's just possible that this symbol is a weak symbol
15786 that's not actually defined anywhere. In that case,
15787 'sec' would be NULL, and we should leave the symbol
15788 alone (it will be set to zero elsewhere in the link). */
15789 if (sec == NULL)
15790 break;
15791 /* Fall through. */
15792
15793 case R_PPC64_GOT16_HA:
15794 case R_PPC64_PLTGOT16_HA:
15795 case R_PPC64_PLT16_HA:
15796 case R_PPC64_GOT_TLSGD16_HA:
15797 case R_PPC64_GOT_TLSLD16_HA:
15798 case R_PPC64_GOT_TPREL16_HA:
15799 case R_PPC64_GOT_DTPREL16_HA:
15800 /* Add 0x10000 if sign bit in 0:15 is set.
15801 Bits 0:15 are not used. */
15802 addend += 0x8000;
15803 break;
15804
15805 case R_PPC64_ADDR16_DS:
15806 case R_PPC64_ADDR16_LO_DS:
15807 case R_PPC64_GOT16_DS:
15808 case R_PPC64_GOT16_LO_DS:
15809 case R_PPC64_PLT16_LO_DS:
15810 case R_PPC64_SECTOFF_DS:
15811 case R_PPC64_SECTOFF_LO_DS:
15812 case R_PPC64_TOC16_DS:
15813 case R_PPC64_TOC16_LO_DS:
15814 case R_PPC64_PLTGOT16_DS:
15815 case R_PPC64_PLTGOT16_LO_DS:
15816 case R_PPC64_GOT_TPREL16_DS:
15817 case R_PPC64_GOT_TPREL16_LO_DS:
15818 case R_PPC64_GOT_DTPREL16_DS:
15819 case R_PPC64_GOT_DTPREL16_LO_DS:
15820 case R_PPC64_TPREL16_DS:
15821 case R_PPC64_TPREL16_LO_DS:
15822 case R_PPC64_DTPREL16_DS:
15823 case R_PPC64_DTPREL16_LO_DS:
15824 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
15825 mask = 3;
15826 /* If this reloc is against an lq, lxv, or stxv insn, then
15827 the value must be a multiple of 16. This is somewhat of
15828 a hack, but the "correct" way to do this by defining _DQ
15829 forms of all the _DS relocs bloats all reloc switches in
15830 this file. It doesn't make much sense to use these
15831 relocs in data, so testing the insn should be safe. */
15832 if ((insn & (0x3f << 26)) == (56u << 26)
15833 || ((insn & (0x3f << 26)) == (61u << 26) && (insn & 3) == 1))
15834 mask = 15;
15835 relocation += addend;
15836 addend = insn & (mask ^ 3);
15837 if ((relocation & mask) != 0)
15838 {
15839 relocation ^= relocation & mask;
15840 info->callbacks->einfo
15841 /* xgettext:c-format */
15842 (_("%H: error: %s not a multiple of %u\n"),
15843 input_bfd, input_section, rel->r_offset,
15844 ppc64_elf_howto_table[r_type]->name,
15845 mask + 1);
15846 bfd_set_error (bfd_error_bad_value);
15847 ret = FALSE;
15848 goto copy_reloc;
15849 }
15850 break;
15851 }
15852
15853 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
15854 because such sections are not SEC_ALLOC and thus ld.so will
15855 not process them. */
15856 howto = ppc64_elf_howto_table[(int) r_type];
15857 if (unresolved_reloc
15858 && !((input_section->flags & SEC_DEBUGGING) != 0
15859 && h->elf.def_dynamic)
15860 && _bfd_elf_section_offset (output_bfd, info, input_section,
15861 rel->r_offset) != (bfd_vma) -1)
15862 {
15863 info->callbacks->einfo
15864 /* xgettext:c-format */
15865 (_("%H: unresolvable %s against `%pT'\n"),
15866 input_bfd, input_section, rel->r_offset,
15867 howto->name,
15868 h->elf.root.root.string);
15869 ret = FALSE;
15870 }
15871
15872 /* 16-bit fields in insns mostly have signed values, but a
15873 few insns have 16-bit unsigned values. Really, we should
15874 have different reloc types. */
15875 if (howto->complain_on_overflow != complain_overflow_dont
15876 && howto->dst_mask == 0xffff
15877 && (input_section->flags & SEC_CODE) != 0)
15878 {
15879 enum complain_overflow complain = complain_overflow_signed;
15880
15881 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
15882 if ((insn & (0x3f << 26)) == 10u << 26 /* cmpli */)
15883 complain = complain_overflow_bitfield;
15884 else if (howto->rightshift == 0
15885 ? ((insn & (0x3f << 26)) == 28u << 26 /* andi */
15886 || (insn & (0x3f << 26)) == 24u << 26 /* ori */
15887 || (insn & (0x3f << 26)) == 26u << 26 /* xori */)
15888 : ((insn & (0x3f << 26)) == 29u << 26 /* andis */
15889 || (insn & (0x3f << 26)) == 25u << 26 /* oris */
15890 || (insn & (0x3f << 26)) == 27u << 26 /* xoris */))
15891 complain = complain_overflow_unsigned;
15892 if (howto->complain_on_overflow != complain)
15893 {
15894 alt_howto = *howto;
15895 alt_howto.complain_on_overflow = complain;
15896 howto = &alt_howto;
15897 }
15898 }
15899
15900 if (r_type == R_PPC64_REL16DX_HA)
15901 {
15902 /* Split field reloc isn't handled by _bfd_final_link_relocate. */
15903 if (rel->r_offset + 4 > input_section->size)
15904 r = bfd_reloc_outofrange;
15905 else
15906 {
15907 relocation += addend;
15908 relocation -= (rel->r_offset
15909 + input_section->output_offset
15910 + input_section->output_section->vma);
15911 relocation = (bfd_signed_vma) relocation >> 16;
15912 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
15913 insn &= ~0x1fffc1;
15914 insn |= (relocation & 0xffc1) | ((relocation & 0x3e) << 15);
15915 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
15916 r = bfd_reloc_ok;
15917 if (relocation + 0x8000 > 0xffff)
15918 r = bfd_reloc_overflow;
15919 }
15920 }
15921 else
15922 r = _bfd_final_link_relocate (howto, input_bfd, input_section, contents,
15923 rel->r_offset, relocation, addend);
15924
15925 if (r != bfd_reloc_ok)
15926 {
15927 char *more_info = NULL;
15928 const char *reloc_name = howto->name;
15929
15930 if (reloc_dest != DEST_NORMAL)
15931 {
15932 more_info = bfd_malloc (strlen (reloc_name) + 8);
15933 if (more_info != NULL)
15934 {
15935 strcpy (more_info, reloc_name);
15936 strcat (more_info, (reloc_dest == DEST_OPD
15937 ? " (OPD)" : " (stub)"));
15938 reloc_name = more_info;
15939 }
15940 }
15941
15942 if (r == bfd_reloc_overflow)
15943 {
15944 /* On code like "if (foo) foo();" don't report overflow
15945 on a branch to zero when foo is undefined. */
15946 if (!warned
15947 && (reloc_dest == DEST_STUB
15948 || !(h != NULL
15949 && (h->elf.root.type == bfd_link_hash_undefweak
15950 || h->elf.root.type == bfd_link_hash_undefined)
15951 && is_branch_reloc (r_type))))
15952 info->callbacks->reloc_overflow (info, &h->elf.root,
15953 sym_name, reloc_name,
15954 orig_rel.r_addend,
15955 input_bfd, input_section,
15956 rel->r_offset);
15957 }
15958 else
15959 {
15960 info->callbacks->einfo
15961 /* xgettext:c-format */
15962 (_("%H: %s against `%pT': error %d\n"),
15963 input_bfd, input_section, rel->r_offset,
15964 reloc_name, sym_name, (int) r);
15965 ret = FALSE;
15966 }
15967 if (more_info != NULL)
15968 free (more_info);
15969 }
15970 copy_reloc:
15971 if (wrel != rel)
15972 *wrel = *rel;
15973 }
15974
15975 if (wrel != rel)
15976 {
15977 Elf_Internal_Shdr *rel_hdr;
15978 size_t deleted = rel - wrel;
15979
15980 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
15981 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
15982 if (rel_hdr->sh_size == 0)
15983 {
15984 /* It is too late to remove an empty reloc section. Leave
15985 one NONE reloc.
15986 ??? What is wrong with an empty section??? */
15987 rel_hdr->sh_size = rel_hdr->sh_entsize;
15988 deleted -= 1;
15989 }
15990 rel_hdr = _bfd_elf_single_rel_hdr (input_section);
15991 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
15992 input_section->reloc_count -= deleted;
15993 }
15994
15995 /* If we're emitting relocations, then shortly after this function
15996 returns, reloc offsets and addends for this section will be
15997 adjusted. Worse, reloc symbol indices will be for the output
15998 file rather than the input. Save a copy of the relocs for
15999 opd_entry_value. */
16000 if (is_opd && (info->emitrelocations || bfd_link_relocatable (info)))
16001 {
16002 bfd_size_type amt;
16003 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
16004 rel = bfd_alloc (input_bfd, amt);
16005 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd.relocs == NULL);
16006 ppc64_elf_tdata (input_bfd)->opd.relocs = rel;
16007 if (rel == NULL)
16008 return FALSE;
16009 memcpy (rel, relocs, amt);
16010 }
16011 return ret;
16012 }
16013
16014 /* Adjust the value of any local symbols in opd sections. */
16015
16016 static int
16017 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
16018 const char *name ATTRIBUTE_UNUSED,
16019 Elf_Internal_Sym *elfsym,
16020 asection *input_sec,
16021 struct elf_link_hash_entry *h)
16022 {
16023 struct _opd_sec_data *opd;
16024 long adjust;
16025 bfd_vma value;
16026
16027 if (h != NULL)
16028 return 1;
16029
16030 opd = get_opd_info (input_sec);
16031 if (opd == NULL || opd->adjust == NULL)
16032 return 1;
16033
16034 value = elfsym->st_value - input_sec->output_offset;
16035 if (!bfd_link_relocatable (info))
16036 value -= input_sec->output_section->vma;
16037
16038 adjust = opd->adjust[OPD_NDX (value)];
16039 if (adjust == -1)
16040 return 2;
16041
16042 elfsym->st_value += adjust;
16043 return 1;
16044 }
16045
16046 /* Finish up dynamic symbol handling. We set the contents of various
16047 dynamic sections here. */
16048
16049 static bfd_boolean
16050 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
16051 struct bfd_link_info *info,
16052 struct elf_link_hash_entry *h,
16053 Elf_Internal_Sym *sym)
16054 {
16055 struct ppc_link_hash_table *htab;
16056 struct plt_entry *ent;
16057
16058 htab = ppc_hash_table (info);
16059 if (htab == NULL)
16060 return FALSE;
16061
16062 if (!htab->opd_abi && !h->def_regular)
16063 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
16064 if (ent->plt.offset != (bfd_vma) -1)
16065 {
16066 /* Mark the symbol as undefined, rather than as
16067 defined in glink. Leave the value if there were
16068 any relocations where pointer equality matters
16069 (this is a clue for the dynamic linker, to make
16070 function pointer comparisons work between an
16071 application and shared library), otherwise set it
16072 to zero. */
16073 sym->st_shndx = SHN_UNDEF;
16074 if (!h->pointer_equality_needed)
16075 sym->st_value = 0;
16076 else if (!h->ref_regular_nonweak)
16077 {
16078 /* This breaks function pointer comparisons, but
16079 that is better than breaking tests for a NULL
16080 function pointer. */
16081 sym->st_value = 0;
16082 }
16083 break;
16084 }
16085
16086 if (h->needs_copy)
16087 {
16088 /* This symbol needs a copy reloc. Set it up. */
16089 Elf_Internal_Rela rela;
16090 asection *srel;
16091 bfd_byte *loc;
16092
16093 if (h->dynindx == -1
16094 || (h->root.type != bfd_link_hash_defined
16095 && h->root.type != bfd_link_hash_defweak)
16096 || htab->elf.srelbss == NULL
16097 || htab->elf.sreldynrelro == NULL)
16098 abort ();
16099
16100 rela.r_offset = (h->root.u.def.value
16101 + h->root.u.def.section->output_section->vma
16102 + h->root.u.def.section->output_offset);
16103 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
16104 rela.r_addend = 0;
16105 if (h->root.u.def.section == htab->elf.sdynrelro)
16106 srel = htab->elf.sreldynrelro;
16107 else
16108 srel = htab->elf.srelbss;
16109 loc = srel->contents;
16110 loc += srel->reloc_count++ * sizeof (Elf64_External_Rela);
16111 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
16112 }
16113
16114 return TRUE;
16115 }
16116
16117 /* Used to decide how to sort relocs in an optimal manner for the
16118 dynamic linker, before writing them out. */
16119
16120 static enum elf_reloc_type_class
16121 ppc64_elf_reloc_type_class (const struct bfd_link_info *info,
16122 const asection *rel_sec,
16123 const Elf_Internal_Rela *rela)
16124 {
16125 enum elf_ppc64_reloc_type r_type;
16126 struct ppc_link_hash_table *htab = ppc_hash_table (info);
16127
16128 if (rel_sec == htab->elf.irelplt)
16129 return reloc_class_ifunc;
16130
16131 r_type = ELF64_R_TYPE (rela->r_info);
16132 switch (r_type)
16133 {
16134 case R_PPC64_RELATIVE:
16135 return reloc_class_relative;
16136 case R_PPC64_JMP_SLOT:
16137 return reloc_class_plt;
16138 case R_PPC64_COPY:
16139 return reloc_class_copy;
16140 default:
16141 return reloc_class_normal;
16142 }
16143 }
16144
16145 /* Finish up the dynamic sections. */
16146
16147 static bfd_boolean
16148 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
16149 struct bfd_link_info *info)
16150 {
16151 struct ppc_link_hash_table *htab;
16152 bfd *dynobj;
16153 asection *sdyn;
16154
16155 htab = ppc_hash_table (info);
16156 if (htab == NULL)
16157 return FALSE;
16158
16159 dynobj = htab->elf.dynobj;
16160 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
16161
16162 if (htab->elf.dynamic_sections_created)
16163 {
16164 Elf64_External_Dyn *dyncon, *dynconend;
16165
16166 if (sdyn == NULL || htab->elf.sgot == NULL)
16167 abort ();
16168
16169 dyncon = (Elf64_External_Dyn *) sdyn->contents;
16170 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
16171 for (; dyncon < dynconend; dyncon++)
16172 {
16173 Elf_Internal_Dyn dyn;
16174 asection *s;
16175
16176 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
16177
16178 switch (dyn.d_tag)
16179 {
16180 default:
16181 continue;
16182
16183 case DT_PPC64_GLINK:
16184 s = htab->glink;
16185 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
16186 /* We stupidly defined DT_PPC64_GLINK to be the start
16187 of glink rather than the first entry point, which is
16188 what ld.so needs, and now have a bigger stub to
16189 support automatic multiple TOCs. */
16190 dyn.d_un.d_ptr += GLINK_PLTRESOLVE_SIZE (htab) - 8 * 4;
16191 break;
16192
16193 case DT_PPC64_OPD:
16194 s = bfd_get_section_by_name (output_bfd, ".opd");
16195 if (s == NULL)
16196 continue;
16197 dyn.d_un.d_ptr = s->vma;
16198 break;
16199
16200 case DT_PPC64_OPT:
16201 if (htab->do_multi_toc && htab->multi_toc_needed)
16202 dyn.d_un.d_val |= PPC64_OPT_MULTI_TOC;
16203 if (htab->has_plt_localentry0)
16204 dyn.d_un.d_val |= PPC64_OPT_LOCALENTRY;
16205 break;
16206
16207 case DT_PPC64_OPDSZ:
16208 s = bfd_get_section_by_name (output_bfd, ".opd");
16209 if (s == NULL)
16210 continue;
16211 dyn.d_un.d_val = s->size;
16212 break;
16213
16214 case DT_PLTGOT:
16215 s = htab->elf.splt;
16216 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
16217 break;
16218
16219 case DT_JMPREL:
16220 s = htab->elf.srelplt;
16221 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
16222 break;
16223
16224 case DT_PLTRELSZ:
16225 dyn.d_un.d_val = htab->elf.srelplt->size;
16226 break;
16227
16228 case DT_TEXTREL:
16229 if (htab->local_ifunc_resolver)
16230 info->callbacks->einfo
16231 (_("%X%P: text relocations and GNU indirect "
16232 "functions will result in a segfault at runtime\n"));
16233 else if (htab->maybe_local_ifunc_resolver)
16234 info->callbacks->einfo
16235 (_("%P: warning: text relocations and GNU indirect "
16236 "functions may result in a segfault at runtime\n"));
16237 continue;
16238 }
16239
16240 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
16241 }
16242 }
16243
16244 if (htab->elf.sgot != NULL && htab->elf.sgot->size != 0
16245 && htab->elf.sgot->output_section != bfd_abs_section_ptr)
16246 {
16247 /* Fill in the first entry in the global offset table.
16248 We use it to hold the link-time TOCbase. */
16249 bfd_put_64 (output_bfd,
16250 elf_gp (output_bfd) + TOC_BASE_OFF,
16251 htab->elf.sgot->contents);
16252
16253 /* Set .got entry size. */
16254 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 8;
16255 }
16256
16257 if (htab->elf.splt != NULL && htab->elf.splt->size != 0
16258 && htab->elf.splt->output_section != bfd_abs_section_ptr)
16259 {
16260 /* Set .plt entry size. */
16261 elf_section_data (htab->elf.splt->output_section)->this_hdr.sh_entsize
16262 = PLT_ENTRY_SIZE (htab);
16263 }
16264
16265 /* brlt is SEC_LINKER_CREATED, so we need to write out relocs for
16266 brlt ourselves if emitrelocations. */
16267 if (htab->brlt != NULL
16268 && htab->brlt->reloc_count != 0
16269 && !_bfd_elf_link_output_relocs (output_bfd,
16270 htab->brlt,
16271 elf_section_data (htab->brlt)->rela.hdr,
16272 elf_section_data (htab->brlt)->relocs,
16273 NULL))
16274 return FALSE;
16275
16276 if (htab->glink != NULL
16277 && htab->glink->reloc_count != 0
16278 && !_bfd_elf_link_output_relocs (output_bfd,
16279 htab->glink,
16280 elf_section_data (htab->glink)->rela.hdr,
16281 elf_section_data (htab->glink)->relocs,
16282 NULL))
16283 return FALSE;
16284
16285 if (htab->glink_eh_frame != NULL
16286 && htab->glink_eh_frame->size != 0)
16287 {
16288 bfd_vma val;
16289 bfd_byte *p;
16290 struct map_stub *group;
16291 size_t align = 4;
16292
16293 p = htab->glink_eh_frame->contents;
16294 p += (sizeof (glink_eh_frame_cie) + align - 1) & -align;
16295
16296 for (group = htab->group; group != NULL; group = group->next)
16297 if (group->stub_sec != NULL)
16298 {
16299 /* Offset to stub section. */
16300 val = (group->stub_sec->output_section->vma
16301 + group->stub_sec->output_offset);
16302 val -= (htab->glink_eh_frame->output_section->vma
16303 + htab->glink_eh_frame->output_offset
16304 + (p + 8 - htab->glink_eh_frame->contents));
16305 if (val + 0x80000000 > 0xffffffff)
16306 {
16307 _bfd_error_handler
16308 (_("%s offset too large for .eh_frame sdata4 encoding"),
16309 group->stub_sec->name);
16310 return FALSE;
16311 }
16312 bfd_put_32 (dynobj, val, p + 8);
16313 p += stub_eh_frame_size (group, align);
16314 }
16315 if (htab->glink != NULL && htab->glink->size != 0)
16316 {
16317 /* Offset to .glink. */
16318 val = (htab->glink->output_section->vma
16319 + htab->glink->output_offset
16320 + 8);
16321 val -= (htab->glink_eh_frame->output_section->vma
16322 + htab->glink_eh_frame->output_offset
16323 + (p + 8 - htab->glink_eh_frame->contents));
16324 if (val + 0x80000000 > 0xffffffff)
16325 {
16326 _bfd_error_handler
16327 (_("%s offset too large for .eh_frame sdata4 encoding"),
16328 htab->glink->name);
16329 return FALSE;
16330 }
16331 bfd_put_32 (dynobj, val, p + 8);
16332 p += (24 + align - 1) & -align;
16333 }
16334
16335 if (htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME
16336 && !_bfd_elf_write_section_eh_frame (output_bfd, info,
16337 htab->glink_eh_frame,
16338 htab->glink_eh_frame->contents))
16339 return FALSE;
16340 }
16341
16342 /* We need to handle writing out multiple GOT sections ourselves,
16343 since we didn't add them to DYNOBJ. We know dynobj is the first
16344 bfd. */
16345 while ((dynobj = dynobj->link.next) != NULL)
16346 {
16347 asection *s;
16348
16349 if (!is_ppc64_elf (dynobj))
16350 continue;
16351
16352 s = ppc64_elf_tdata (dynobj)->got;
16353 if (s != NULL
16354 && s->size != 0
16355 && s->output_section != bfd_abs_section_ptr
16356 && !bfd_set_section_contents (output_bfd, s->output_section,
16357 s->contents, s->output_offset,
16358 s->size))
16359 return FALSE;
16360 s = ppc64_elf_tdata (dynobj)->relgot;
16361 if (s != NULL
16362 && s->size != 0
16363 && s->output_section != bfd_abs_section_ptr
16364 && !bfd_set_section_contents (output_bfd, s->output_section,
16365 s->contents, s->output_offset,
16366 s->size))
16367 return FALSE;
16368 }
16369
16370 return TRUE;
16371 }
16372
16373 #include "elf64-target.h"
16374
16375 /* FreeBSD support */
16376
16377 #undef TARGET_LITTLE_SYM
16378 #undef TARGET_LITTLE_NAME
16379
16380 #undef TARGET_BIG_SYM
16381 #define TARGET_BIG_SYM powerpc_elf64_fbsd_vec
16382 #undef TARGET_BIG_NAME
16383 #define TARGET_BIG_NAME "elf64-powerpc-freebsd"
16384
16385 #undef ELF_OSABI
16386 #define ELF_OSABI ELFOSABI_FREEBSD
16387
16388 #undef elf64_bed
16389 #define elf64_bed elf64_powerpc_fbsd_bed
16390
16391 #include "elf64-target.h"
GDB Binutils - Deliverables
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