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PR22374, PowerPC unnecessary PLT entries
[deliverable/binutils-gdb.git] / bfd / elf64-ppc.c
1 /* PowerPC64-specific support for 64-bit ELF.
2 Copyright (C) 1999-2017 Free Software Foundation, Inc.
3 Written by Linus Nordberg, Swox AB <info@swox.com>,
4 based on elf32-ppc.c by Ian Lance Taylor.
5 Largely rewritten by Alan Modra.
6
7 This file is part of BFD, the Binary File Descriptor library.
8
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
13
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
18
19 You should have received a copy of the GNU General Public License along
20 with this program; if not, write to the Free Software Foundation, Inc.,
21 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
22
23
24 /* The 64-bit PowerPC ELF ABI may be found at
25 http://www.linuxbase.org/spec/ELF/ppc64/PPC-elf64abi.txt, and
26 http://www.linuxbase.org/spec/ELF/ppc64/spec/book1.html */
27
28 #include "sysdep.h"
29 #include <stdarg.h>
30 #include "bfd.h"
31 #include "bfdlink.h"
32 #include "libbfd.h"
33 #include "elf-bfd.h"
34 #include "elf/ppc64.h"
35 #include "elf64-ppc.h"
36 #include "dwarf2.h"
37
38 static bfd_reloc_status_type ppc64_elf_ha_reloc
39 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
40 static bfd_reloc_status_type ppc64_elf_branch_reloc
41 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
42 static bfd_reloc_status_type ppc64_elf_brtaken_reloc
43 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
44 static bfd_reloc_status_type ppc64_elf_sectoff_reloc
45 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
46 static bfd_reloc_status_type ppc64_elf_sectoff_ha_reloc
47 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
48 static bfd_reloc_status_type ppc64_elf_toc_reloc
49 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
50 static bfd_reloc_status_type ppc64_elf_toc_ha_reloc
51 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
52 static bfd_reloc_status_type ppc64_elf_toc64_reloc
53 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
54 static bfd_reloc_status_type ppc64_elf_unhandled_reloc
55 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
56 static bfd_vma opd_entry_value
57 (asection *, bfd_vma, asection **, bfd_vma *, bfd_boolean);
58
59 #define TARGET_LITTLE_SYM powerpc_elf64_le_vec
60 #define TARGET_LITTLE_NAME "elf64-powerpcle"
61 #define TARGET_BIG_SYM powerpc_elf64_vec
62 #define TARGET_BIG_NAME "elf64-powerpc"
63 #define ELF_ARCH bfd_arch_powerpc
64 #define ELF_TARGET_ID PPC64_ELF_DATA
65 #define ELF_MACHINE_CODE EM_PPC64
66 #define ELF_MAXPAGESIZE 0x10000
67 #define ELF_COMMONPAGESIZE 0x10000
68 #define elf_info_to_howto ppc64_elf_info_to_howto
69
70 #define elf_backend_want_got_sym 0
71 #define elf_backend_want_plt_sym 0
72 #define elf_backend_plt_alignment 3
73 #define elf_backend_plt_not_loaded 1
74 #define elf_backend_got_header_size 8
75 #define elf_backend_want_dynrelro 1
76 #define elf_backend_can_gc_sections 1
77 #define elf_backend_can_refcount 1
78 #define elf_backend_rela_normal 1
79 #define elf_backend_dtrel_excludes_plt 1
80 #define elf_backend_default_execstack 0
81
82 #define bfd_elf64_mkobject ppc64_elf_mkobject
83 #define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup
84 #define bfd_elf64_bfd_reloc_name_lookup ppc64_elf_reloc_name_lookup
85 #define bfd_elf64_bfd_merge_private_bfd_data ppc64_elf_merge_private_bfd_data
86 #define bfd_elf64_bfd_print_private_bfd_data ppc64_elf_print_private_bfd_data
87 #define bfd_elf64_new_section_hook ppc64_elf_new_section_hook
88 #define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create
89 #define bfd_elf64_get_synthetic_symtab ppc64_elf_get_synthetic_symtab
90 #define bfd_elf64_bfd_link_just_syms ppc64_elf_link_just_syms
91 #define bfd_elf64_bfd_gc_sections ppc64_elf_gc_sections
92
93 #define elf_backend_object_p ppc64_elf_object_p
94 #define elf_backend_grok_prstatus ppc64_elf_grok_prstatus
95 #define elf_backend_grok_psinfo ppc64_elf_grok_psinfo
96 #define elf_backend_write_core_note ppc64_elf_write_core_note
97 #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
98 #define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol
99 #define elf_backend_add_symbol_hook ppc64_elf_add_symbol_hook
100 #define elf_backend_check_directives ppc64_elf_before_check_relocs
101 #define elf_backend_notice_as_needed ppc64_elf_notice_as_needed
102 #define elf_backend_archive_symbol_lookup ppc64_elf_archive_symbol_lookup
103 #define elf_backend_check_relocs ppc64_elf_check_relocs
104 #define elf_backend_relocs_compatible _bfd_elf_relocs_compatible
105 #define elf_backend_gc_keep ppc64_elf_gc_keep
106 #define elf_backend_gc_mark_dynamic_ref ppc64_elf_gc_mark_dynamic_ref
107 #define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook
108 #define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol
109 #define elf_backend_hide_symbol ppc64_elf_hide_symbol
110 #define elf_backend_maybe_function_sym ppc64_elf_maybe_function_sym
111 #define elf_backend_always_size_sections ppc64_elf_func_desc_adjust
112 #define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections
113 #define elf_backend_hash_symbol ppc64_elf_hash_symbol
114 #define elf_backend_init_index_section _bfd_elf_init_2_index_sections
115 #define elf_backend_action_discarded ppc64_elf_action_discarded
116 #define elf_backend_relocate_section ppc64_elf_relocate_section
117 #define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol
118 #define elf_backend_reloc_type_class ppc64_elf_reloc_type_class
119 #define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections
120 #define elf_backend_link_output_symbol_hook ppc64_elf_output_symbol_hook
121 #define elf_backend_special_sections ppc64_elf_special_sections
122 #define elf_backend_merge_symbol_attribute ppc64_elf_merge_symbol_attribute
123 #define elf_backend_merge_symbol ppc64_elf_merge_symbol
124 #define elf_backend_get_reloc_section bfd_get_section_by_name
125
126 /* The name of the dynamic interpreter. This is put in the .interp
127 section. */
128 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
129
130 /* The size in bytes of an entry in the procedure linkage table. */
131 #define PLT_ENTRY_SIZE(htab) (htab->opd_abi ? 24 : 8)
132
133 /* The initial size of the plt reserved for the dynamic linker. */
134 #define PLT_INITIAL_ENTRY_SIZE(htab) (htab->opd_abi ? 24 : 16)
135
136 /* Offsets to some stack save slots. */
137 #define STK_LR 16
138 #define STK_TOC(htab) (htab->opd_abi ? 40 : 24)
139 /* This one is dodgy. ELFv2 does not have a linker word, so use the
140 CR save slot. Used only by optimised __tls_get_addr call stub,
141 relying on __tls_get_addr_opt not saving CR.. */
142 #define STK_LINKER(htab) (htab->opd_abi ? 32 : 8)
143
144 /* TOC base pointers offset from start of TOC. */
145 #define TOC_BASE_OFF 0x8000
146 /* TOC base alignment. */
147 #define TOC_BASE_ALIGN 256
148
149 /* Offset of tp and dtp pointers from start of TLS block. */
150 #define TP_OFFSET 0x7000
151 #define DTP_OFFSET 0x8000
152
153 /* .plt call stub instructions. The normal stub is like this, but
154 sometimes the .plt entry crosses a 64k boundary and we need to
155 insert an addi to adjust r11. */
156 #define STD_R2_0R1 0xf8410000 /* std %r2,0+40(%r1) */
157 #define ADDIS_R11_R2 0x3d620000 /* addis %r11,%r2,xxx@ha */
158 #define LD_R12_0R11 0xe98b0000 /* ld %r12,xxx+0@l(%r11) */
159 #define MTCTR_R12 0x7d8903a6 /* mtctr %r12 */
160 #define LD_R2_0R11 0xe84b0000 /* ld %r2,xxx+8@l(%r11) */
161 #define LD_R11_0R11 0xe96b0000 /* ld %r11,xxx+16@l(%r11) */
162 #define BCTR 0x4e800420 /* bctr */
163
164 #define ADDI_R11_R11 0x396b0000 /* addi %r11,%r11,off@l */
165 #define ADDIS_R2_R2 0x3c420000 /* addis %r2,%r2,off@ha */
166 #define ADDI_R2_R2 0x38420000 /* addi %r2,%r2,off@l */
167
168 #define XOR_R2_R12_R12 0x7d826278 /* xor %r2,%r12,%r12 */
169 #define ADD_R11_R11_R2 0x7d6b1214 /* add %r11,%r11,%r2 */
170 #define XOR_R11_R12_R12 0x7d8b6278 /* xor %r11,%r12,%r12 */
171 #define ADD_R2_R2_R11 0x7c425a14 /* add %r2,%r2,%r11 */
172 #define CMPLDI_R2_0 0x28220000 /* cmpldi %r2,0 */
173 #define BNECTR 0x4ca20420 /* bnectr+ */
174 #define BNECTR_P4 0x4ce20420 /* bnectr+ */
175
176 #define LD_R12_0R2 0xe9820000 /* ld %r12,xxx+0(%r2) */
177 #define LD_R11_0R2 0xe9620000 /* ld %r11,xxx+0(%r2) */
178 #define LD_R2_0R2 0xe8420000 /* ld %r2,xxx+0(%r2) */
179
180 #define LD_R2_0R1 0xe8410000 /* ld %r2,0(%r1) */
181 #define LD_R2_0R12 0xe84c0000 /* ld %r2,0(%r12) */
182 #define ADD_R2_R2_R12 0x7c426214 /* add %r2,%r2,%r12 */
183
184 #define LIS_R2 0x3c400000 /* lis %r2,xxx@ha */
185 #define ADDIS_R2_R12 0x3c4c0000 /* addis %r2,%r12,xxx@ha */
186 #define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */
187 #define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,xxx@ha */
188 #define LD_R12_0R12 0xe98c0000 /* ld %r12,xxx@l(%r12) */
189
190 /* glink call stub instructions. We enter with the index in R0. */
191 #define GLINK_CALL_STUB_SIZE (16*4)
192 /* 0: */
193 /* .quad plt0-1f */
194 /* __glink: */
195 #define MFLR_R12 0x7d8802a6 /* mflr %12 */
196 #define BCL_20_31 0x429f0005 /* bcl 20,31,1f */
197 /* 1: */
198 #define MFLR_R11 0x7d6802a6 /* mflr %11 */
199 /* ld %2,(0b-1b)(%11) */
200 #define MTLR_R12 0x7d8803a6 /* mtlr %12 */
201 #define ADD_R11_R2_R11 0x7d625a14 /* add %11,%2,%11 */
202 /* ld %12,0(%11) */
203 /* ld %2,8(%11) */
204 /* mtctr %12 */
205 /* ld %11,16(%11) */
206 /* bctr */
207 #define MFLR_R0 0x7c0802a6 /* mflr %r0 */
208 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
209 #define SUB_R12_R12_R11 0x7d8b6050 /* subf %r12,%r11,%r12 */
210 #define ADDI_R0_R12 0x380c0000 /* addi %r0,%r12,0 */
211 #define SRDI_R0_R0_2 0x7800f082 /* rldicl %r0,%r0,62,2 */
212
213 /* Pad with this. */
214 #define NOP 0x60000000
215
216 /* Some other nops. */
217 #define CROR_151515 0x4def7b82
218 #define CROR_313131 0x4ffffb82
219
220 /* .glink entries for the first 32k functions are two instructions. */
221 #define LI_R0_0 0x38000000 /* li %r0,0 */
222 #define B_DOT 0x48000000 /* b . */
223
224 /* After that, we need two instructions to load the index, followed by
225 a branch. */
226 #define LIS_R0_0 0x3c000000 /* lis %r0,0 */
227 #define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
228
229 /* Instructions used by the save and restore reg functions. */
230 #define STD_R0_0R1 0xf8010000 /* std %r0,0(%r1) */
231 #define STD_R0_0R12 0xf80c0000 /* std %r0,0(%r12) */
232 #define LD_R0_0R1 0xe8010000 /* ld %r0,0(%r1) */
233 #define LD_R0_0R12 0xe80c0000 /* ld %r0,0(%r12) */
234 #define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
235 #define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
236 #define LI_R12_0 0x39800000 /* li %r12,0 */
237 #define STVX_VR0_R12_R0 0x7c0c01ce /* stvx %v0,%r12,%r0 */
238 #define LVX_VR0_R12_R0 0x7c0c00ce /* lvx %v0,%r12,%r0 */
239 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
240 #define BLR 0x4e800020 /* blr */
241
242 /* Since .opd is an array of descriptors and each entry will end up
243 with identical R_PPC64_RELATIVE relocs, there is really no need to
244 propagate .opd relocs; The dynamic linker should be taught to
245 relocate .opd without reloc entries. */
246 #ifndef NO_OPD_RELOCS
247 #define NO_OPD_RELOCS 0
248 #endif
249
250 #ifndef ARRAY_SIZE
251 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
252 #endif
253
254 static inline int
255 abiversion (bfd *abfd)
256 {
257 return elf_elfheader (abfd)->e_flags & EF_PPC64_ABI;
258 }
259
260 static inline void
261 set_abiversion (bfd *abfd, int ver)
262 {
263 elf_elfheader (abfd)->e_flags &= ~EF_PPC64_ABI;
264 elf_elfheader (abfd)->e_flags |= ver & EF_PPC64_ABI;
265 }
266 \f
267 #define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1)
268
269 /* Relocation HOWTO's. */
270 static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max];
271
272 static reloc_howto_type ppc64_elf_howto_raw[] = {
273 /* This reloc does nothing. */
274 HOWTO (R_PPC64_NONE, /* type */
275 0, /* rightshift */
276 3, /* size (0 = byte, 1 = short, 2 = long) */
277 0, /* bitsize */
278 FALSE, /* pc_relative */
279 0, /* bitpos */
280 complain_overflow_dont, /* complain_on_overflow */
281 bfd_elf_generic_reloc, /* special_function */
282 "R_PPC64_NONE", /* name */
283 FALSE, /* partial_inplace */
284 0, /* src_mask */
285 0, /* dst_mask */
286 FALSE), /* pcrel_offset */
287
288 /* A standard 32 bit relocation. */
289 HOWTO (R_PPC64_ADDR32, /* type */
290 0, /* rightshift */
291 2, /* size (0 = byte, 1 = short, 2 = long) */
292 32, /* bitsize */
293 FALSE, /* pc_relative */
294 0, /* bitpos */
295 complain_overflow_bitfield, /* complain_on_overflow */
296 bfd_elf_generic_reloc, /* special_function */
297 "R_PPC64_ADDR32", /* name */
298 FALSE, /* partial_inplace */
299 0, /* src_mask */
300 0xffffffff, /* dst_mask */
301 FALSE), /* pcrel_offset */
302
303 /* An absolute 26 bit branch; the lower two bits must be zero.
304 FIXME: we don't check that, we just clear them. */
305 HOWTO (R_PPC64_ADDR24, /* type */
306 0, /* rightshift */
307 2, /* size (0 = byte, 1 = short, 2 = long) */
308 26, /* bitsize */
309 FALSE, /* pc_relative */
310 0, /* bitpos */
311 complain_overflow_bitfield, /* complain_on_overflow */
312 bfd_elf_generic_reloc, /* special_function */
313 "R_PPC64_ADDR24", /* name */
314 FALSE, /* partial_inplace */
315 0, /* src_mask */
316 0x03fffffc, /* dst_mask */
317 FALSE), /* pcrel_offset */
318
319 /* A standard 16 bit relocation. */
320 HOWTO (R_PPC64_ADDR16, /* type */
321 0, /* rightshift */
322 1, /* size (0 = byte, 1 = short, 2 = long) */
323 16, /* bitsize */
324 FALSE, /* pc_relative */
325 0, /* bitpos */
326 complain_overflow_bitfield, /* complain_on_overflow */
327 bfd_elf_generic_reloc, /* special_function */
328 "R_PPC64_ADDR16", /* name */
329 FALSE, /* partial_inplace */
330 0, /* src_mask */
331 0xffff, /* dst_mask */
332 FALSE), /* pcrel_offset */
333
334 /* A 16 bit relocation without overflow. */
335 HOWTO (R_PPC64_ADDR16_LO, /* type */
336 0, /* rightshift */
337 1, /* size (0 = byte, 1 = short, 2 = long) */
338 16, /* bitsize */
339 FALSE, /* pc_relative */
340 0, /* bitpos */
341 complain_overflow_dont,/* complain_on_overflow */
342 bfd_elf_generic_reloc, /* special_function */
343 "R_PPC64_ADDR16_LO", /* name */
344 FALSE, /* partial_inplace */
345 0, /* src_mask */
346 0xffff, /* dst_mask */
347 FALSE), /* pcrel_offset */
348
349 /* Bits 16-31 of an address. */
350 HOWTO (R_PPC64_ADDR16_HI, /* type */
351 16, /* rightshift */
352 1, /* size (0 = byte, 1 = short, 2 = long) */
353 16, /* bitsize */
354 FALSE, /* pc_relative */
355 0, /* bitpos */
356 complain_overflow_signed, /* complain_on_overflow */
357 bfd_elf_generic_reloc, /* special_function */
358 "R_PPC64_ADDR16_HI", /* name */
359 FALSE, /* partial_inplace */
360 0, /* src_mask */
361 0xffff, /* dst_mask */
362 FALSE), /* pcrel_offset */
363
364 /* Bits 16-31 of an address, plus 1 if the contents of the low 16
365 bits, treated as a signed number, is negative. */
366 HOWTO (R_PPC64_ADDR16_HA, /* type */
367 16, /* rightshift */
368 1, /* size (0 = byte, 1 = short, 2 = long) */
369 16, /* bitsize */
370 FALSE, /* pc_relative */
371 0, /* bitpos */
372 complain_overflow_signed, /* complain_on_overflow */
373 ppc64_elf_ha_reloc, /* special_function */
374 "R_PPC64_ADDR16_HA", /* name */
375 FALSE, /* partial_inplace */
376 0, /* src_mask */
377 0xffff, /* dst_mask */
378 FALSE), /* pcrel_offset */
379
380 /* An absolute 16 bit branch; the lower two bits must be zero.
381 FIXME: we don't check that, we just clear them. */
382 HOWTO (R_PPC64_ADDR14, /* type */
383 0, /* rightshift */
384 2, /* size (0 = byte, 1 = short, 2 = long) */
385 16, /* bitsize */
386 FALSE, /* pc_relative */
387 0, /* bitpos */
388 complain_overflow_signed, /* complain_on_overflow */
389 ppc64_elf_branch_reloc, /* special_function */
390 "R_PPC64_ADDR14", /* name */
391 FALSE, /* partial_inplace */
392 0, /* src_mask */
393 0x0000fffc, /* dst_mask */
394 FALSE), /* pcrel_offset */
395
396 /* An absolute 16 bit branch, for which bit 10 should be set to
397 indicate that the branch is expected to be taken. The lower two
398 bits must be zero. */
399 HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */
400 0, /* rightshift */
401 2, /* size (0 = byte, 1 = short, 2 = long) */
402 16, /* bitsize */
403 FALSE, /* pc_relative */
404 0, /* bitpos */
405 complain_overflow_signed, /* complain_on_overflow */
406 ppc64_elf_brtaken_reloc, /* special_function */
407 "R_PPC64_ADDR14_BRTAKEN",/* name */
408 FALSE, /* partial_inplace */
409 0, /* src_mask */
410 0x0000fffc, /* dst_mask */
411 FALSE), /* pcrel_offset */
412
413 /* An absolute 16 bit branch, for which bit 10 should be set to
414 indicate that the branch is not expected to be taken. The lower
415 two bits must be zero. */
416 HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */
417 0, /* rightshift */
418 2, /* size (0 = byte, 1 = short, 2 = long) */
419 16, /* bitsize */
420 FALSE, /* pc_relative */
421 0, /* bitpos */
422 complain_overflow_signed, /* complain_on_overflow */
423 ppc64_elf_brtaken_reloc, /* special_function */
424 "R_PPC64_ADDR14_BRNTAKEN",/* name */
425 FALSE, /* partial_inplace */
426 0, /* src_mask */
427 0x0000fffc, /* dst_mask */
428 FALSE), /* pcrel_offset */
429
430 /* A relative 26 bit branch; the lower two bits must be zero. */
431 HOWTO (R_PPC64_REL24, /* type */
432 0, /* rightshift */
433 2, /* size (0 = byte, 1 = short, 2 = long) */
434 26, /* bitsize */
435 TRUE, /* pc_relative */
436 0, /* bitpos */
437 complain_overflow_signed, /* complain_on_overflow */
438 ppc64_elf_branch_reloc, /* special_function */
439 "R_PPC64_REL24", /* name */
440 FALSE, /* partial_inplace */
441 0, /* src_mask */
442 0x03fffffc, /* dst_mask */
443 TRUE), /* pcrel_offset */
444
445 /* A relative 16 bit branch; the lower two bits must be zero. */
446 HOWTO (R_PPC64_REL14, /* type */
447 0, /* rightshift */
448 2, /* size (0 = byte, 1 = short, 2 = long) */
449 16, /* bitsize */
450 TRUE, /* pc_relative */
451 0, /* bitpos */
452 complain_overflow_signed, /* complain_on_overflow */
453 ppc64_elf_branch_reloc, /* special_function */
454 "R_PPC64_REL14", /* name */
455 FALSE, /* partial_inplace */
456 0, /* src_mask */
457 0x0000fffc, /* dst_mask */
458 TRUE), /* pcrel_offset */
459
460 /* A relative 16 bit branch. Bit 10 should be set to indicate that
461 the branch is expected to be taken. The lower two bits must be
462 zero. */
463 HOWTO (R_PPC64_REL14_BRTAKEN, /* type */
464 0, /* rightshift */
465 2, /* size (0 = byte, 1 = short, 2 = long) */
466 16, /* bitsize */
467 TRUE, /* pc_relative */
468 0, /* bitpos */
469 complain_overflow_signed, /* complain_on_overflow */
470 ppc64_elf_brtaken_reloc, /* special_function */
471 "R_PPC64_REL14_BRTAKEN", /* name */
472 FALSE, /* partial_inplace */
473 0, /* src_mask */
474 0x0000fffc, /* dst_mask */
475 TRUE), /* pcrel_offset */
476
477 /* A relative 16 bit branch. Bit 10 should be set to indicate that
478 the branch is not expected to be taken. The lower two bits must
479 be zero. */
480 HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */
481 0, /* rightshift */
482 2, /* size (0 = byte, 1 = short, 2 = long) */
483 16, /* bitsize */
484 TRUE, /* pc_relative */
485 0, /* bitpos */
486 complain_overflow_signed, /* complain_on_overflow */
487 ppc64_elf_brtaken_reloc, /* special_function */
488 "R_PPC64_REL14_BRNTAKEN",/* name */
489 FALSE, /* partial_inplace */
490 0, /* src_mask */
491 0x0000fffc, /* dst_mask */
492 TRUE), /* pcrel_offset */
493
494 /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
495 symbol. */
496 HOWTO (R_PPC64_GOT16, /* type */
497 0, /* rightshift */
498 1, /* size (0 = byte, 1 = short, 2 = long) */
499 16, /* bitsize */
500 FALSE, /* pc_relative */
501 0, /* bitpos */
502 complain_overflow_signed, /* complain_on_overflow */
503 ppc64_elf_unhandled_reloc, /* special_function */
504 "R_PPC64_GOT16", /* name */
505 FALSE, /* partial_inplace */
506 0, /* src_mask */
507 0xffff, /* dst_mask */
508 FALSE), /* pcrel_offset */
509
510 /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
511 the symbol. */
512 HOWTO (R_PPC64_GOT16_LO, /* type */
513 0, /* rightshift */
514 1, /* size (0 = byte, 1 = short, 2 = long) */
515 16, /* bitsize */
516 FALSE, /* pc_relative */
517 0, /* bitpos */
518 complain_overflow_dont, /* complain_on_overflow */
519 ppc64_elf_unhandled_reloc, /* special_function */
520 "R_PPC64_GOT16_LO", /* name */
521 FALSE, /* partial_inplace */
522 0, /* src_mask */
523 0xffff, /* dst_mask */
524 FALSE), /* pcrel_offset */
525
526 /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
527 the symbol. */
528 HOWTO (R_PPC64_GOT16_HI, /* type */
529 16, /* rightshift */
530 1, /* size (0 = byte, 1 = short, 2 = long) */
531 16, /* bitsize */
532 FALSE, /* pc_relative */
533 0, /* bitpos */
534 complain_overflow_signed,/* complain_on_overflow */
535 ppc64_elf_unhandled_reloc, /* special_function */
536 "R_PPC64_GOT16_HI", /* name */
537 FALSE, /* partial_inplace */
538 0, /* src_mask */
539 0xffff, /* dst_mask */
540 FALSE), /* pcrel_offset */
541
542 /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
543 the symbol. */
544 HOWTO (R_PPC64_GOT16_HA, /* type */
545 16, /* rightshift */
546 1, /* size (0 = byte, 1 = short, 2 = long) */
547 16, /* bitsize */
548 FALSE, /* pc_relative */
549 0, /* bitpos */
550 complain_overflow_signed,/* complain_on_overflow */
551 ppc64_elf_unhandled_reloc, /* special_function */
552 "R_PPC64_GOT16_HA", /* name */
553 FALSE, /* partial_inplace */
554 0, /* src_mask */
555 0xffff, /* dst_mask */
556 FALSE), /* pcrel_offset */
557
558 /* This is used only by the dynamic linker. The symbol should exist
559 both in the object being run and in some shared library. The
560 dynamic linker copies the data addressed by the symbol from the
561 shared library into the object, because the object being
562 run has to have the data at some particular address. */
563 HOWTO (R_PPC64_COPY, /* type */
564 0, /* rightshift */
565 0, /* this one is variable size */
566 0, /* bitsize */
567 FALSE, /* pc_relative */
568 0, /* bitpos */
569 complain_overflow_dont, /* complain_on_overflow */
570 ppc64_elf_unhandled_reloc, /* special_function */
571 "R_PPC64_COPY", /* name */
572 FALSE, /* partial_inplace */
573 0, /* src_mask */
574 0, /* dst_mask */
575 FALSE), /* pcrel_offset */
576
577 /* Like R_PPC64_ADDR64, but used when setting global offset table
578 entries. */
579 HOWTO (R_PPC64_GLOB_DAT, /* type */
580 0, /* rightshift */
581 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
582 64, /* bitsize */
583 FALSE, /* pc_relative */
584 0, /* bitpos */
585 complain_overflow_dont, /* complain_on_overflow */
586 ppc64_elf_unhandled_reloc, /* special_function */
587 "R_PPC64_GLOB_DAT", /* name */
588 FALSE, /* partial_inplace */
589 0, /* src_mask */
590 ONES (64), /* dst_mask */
591 FALSE), /* pcrel_offset */
592
593 /* Created by the link editor. Marks a procedure linkage table
594 entry for a symbol. */
595 HOWTO (R_PPC64_JMP_SLOT, /* type */
596 0, /* rightshift */
597 0, /* size (0 = byte, 1 = short, 2 = long) */
598 0, /* bitsize */
599 FALSE, /* pc_relative */
600 0, /* bitpos */
601 complain_overflow_dont, /* complain_on_overflow */
602 ppc64_elf_unhandled_reloc, /* special_function */
603 "R_PPC64_JMP_SLOT", /* name */
604 FALSE, /* partial_inplace */
605 0, /* src_mask */
606 0, /* dst_mask */
607 FALSE), /* pcrel_offset */
608
609 /* Used only by the dynamic linker. When the object is run, this
610 doubleword64 is set to the load address of the object, plus the
611 addend. */
612 HOWTO (R_PPC64_RELATIVE, /* type */
613 0, /* rightshift */
614 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
615 64, /* bitsize */
616 FALSE, /* pc_relative */
617 0, /* bitpos */
618 complain_overflow_dont, /* complain_on_overflow */
619 bfd_elf_generic_reloc, /* special_function */
620 "R_PPC64_RELATIVE", /* name */
621 FALSE, /* partial_inplace */
622 0, /* src_mask */
623 ONES (64), /* dst_mask */
624 FALSE), /* pcrel_offset */
625
626 /* Like R_PPC64_ADDR32, but may be unaligned. */
627 HOWTO (R_PPC64_UADDR32, /* type */
628 0, /* rightshift */
629 2, /* size (0 = byte, 1 = short, 2 = long) */
630 32, /* bitsize */
631 FALSE, /* pc_relative */
632 0, /* bitpos */
633 complain_overflow_bitfield, /* complain_on_overflow */
634 bfd_elf_generic_reloc, /* special_function */
635 "R_PPC64_UADDR32", /* name */
636 FALSE, /* partial_inplace */
637 0, /* src_mask */
638 0xffffffff, /* dst_mask */
639 FALSE), /* pcrel_offset */
640
641 /* Like R_PPC64_ADDR16, but may be unaligned. */
642 HOWTO (R_PPC64_UADDR16, /* type */
643 0, /* rightshift */
644 1, /* size (0 = byte, 1 = short, 2 = long) */
645 16, /* bitsize */
646 FALSE, /* pc_relative */
647 0, /* bitpos */
648 complain_overflow_bitfield, /* complain_on_overflow */
649 bfd_elf_generic_reloc, /* special_function */
650 "R_PPC64_UADDR16", /* name */
651 FALSE, /* partial_inplace */
652 0, /* src_mask */
653 0xffff, /* dst_mask */
654 FALSE), /* pcrel_offset */
655
656 /* 32-bit PC relative. */
657 HOWTO (R_PPC64_REL32, /* type */
658 0, /* rightshift */
659 2, /* size (0 = byte, 1 = short, 2 = long) */
660 32, /* bitsize */
661 TRUE, /* pc_relative */
662 0, /* bitpos */
663 complain_overflow_signed, /* complain_on_overflow */
664 bfd_elf_generic_reloc, /* special_function */
665 "R_PPC64_REL32", /* name */
666 FALSE, /* partial_inplace */
667 0, /* src_mask */
668 0xffffffff, /* dst_mask */
669 TRUE), /* pcrel_offset */
670
671 /* 32-bit relocation to the symbol's procedure linkage table. */
672 HOWTO (R_PPC64_PLT32, /* type */
673 0, /* rightshift */
674 2, /* size (0 = byte, 1 = short, 2 = long) */
675 32, /* bitsize */
676 FALSE, /* pc_relative */
677 0, /* bitpos */
678 complain_overflow_bitfield, /* complain_on_overflow */
679 ppc64_elf_unhandled_reloc, /* special_function */
680 "R_PPC64_PLT32", /* name */
681 FALSE, /* partial_inplace */
682 0, /* src_mask */
683 0xffffffff, /* dst_mask */
684 FALSE), /* pcrel_offset */
685
686 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
687 FIXME: R_PPC64_PLTREL32 not supported. */
688 HOWTO (R_PPC64_PLTREL32, /* type */
689 0, /* rightshift */
690 2, /* size (0 = byte, 1 = short, 2 = long) */
691 32, /* bitsize */
692 TRUE, /* pc_relative */
693 0, /* bitpos */
694 complain_overflow_signed, /* complain_on_overflow */
695 ppc64_elf_unhandled_reloc, /* special_function */
696 "R_PPC64_PLTREL32", /* name */
697 FALSE, /* partial_inplace */
698 0, /* src_mask */
699 0xffffffff, /* dst_mask */
700 TRUE), /* pcrel_offset */
701
702 /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
703 the symbol. */
704 HOWTO (R_PPC64_PLT16_LO, /* type */
705 0, /* rightshift */
706 1, /* size (0 = byte, 1 = short, 2 = long) */
707 16, /* bitsize */
708 FALSE, /* pc_relative */
709 0, /* bitpos */
710 complain_overflow_dont, /* complain_on_overflow */
711 ppc64_elf_unhandled_reloc, /* special_function */
712 "R_PPC64_PLT16_LO", /* name */
713 FALSE, /* partial_inplace */
714 0, /* src_mask */
715 0xffff, /* dst_mask */
716 FALSE), /* pcrel_offset */
717
718 /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
719 the symbol. */
720 HOWTO (R_PPC64_PLT16_HI, /* type */
721 16, /* rightshift */
722 1, /* size (0 = byte, 1 = short, 2 = long) */
723 16, /* bitsize */
724 FALSE, /* pc_relative */
725 0, /* bitpos */
726 complain_overflow_signed, /* complain_on_overflow */
727 ppc64_elf_unhandled_reloc, /* special_function */
728 "R_PPC64_PLT16_HI", /* name */
729 FALSE, /* partial_inplace */
730 0, /* src_mask */
731 0xffff, /* dst_mask */
732 FALSE), /* pcrel_offset */
733
734 /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
735 the symbol. */
736 HOWTO (R_PPC64_PLT16_HA, /* type */
737 16, /* rightshift */
738 1, /* size (0 = byte, 1 = short, 2 = long) */
739 16, /* bitsize */
740 FALSE, /* pc_relative */
741 0, /* bitpos */
742 complain_overflow_signed, /* complain_on_overflow */
743 ppc64_elf_unhandled_reloc, /* special_function */
744 "R_PPC64_PLT16_HA", /* name */
745 FALSE, /* partial_inplace */
746 0, /* src_mask */
747 0xffff, /* dst_mask */
748 FALSE), /* pcrel_offset */
749
750 /* 16-bit section relative relocation. */
751 HOWTO (R_PPC64_SECTOFF, /* type */
752 0, /* rightshift */
753 1, /* size (0 = byte, 1 = short, 2 = long) */
754 16, /* bitsize */
755 FALSE, /* pc_relative */
756 0, /* bitpos */
757 complain_overflow_signed, /* complain_on_overflow */
758 ppc64_elf_sectoff_reloc, /* special_function */
759 "R_PPC64_SECTOFF", /* name */
760 FALSE, /* partial_inplace */
761 0, /* src_mask */
762 0xffff, /* dst_mask */
763 FALSE), /* pcrel_offset */
764
765 /* Like R_PPC64_SECTOFF, but no overflow warning. */
766 HOWTO (R_PPC64_SECTOFF_LO, /* type */
767 0, /* rightshift */
768 1, /* size (0 = byte, 1 = short, 2 = long) */
769 16, /* bitsize */
770 FALSE, /* pc_relative */
771 0, /* bitpos */
772 complain_overflow_dont, /* complain_on_overflow */
773 ppc64_elf_sectoff_reloc, /* special_function */
774 "R_PPC64_SECTOFF_LO", /* name */
775 FALSE, /* partial_inplace */
776 0, /* src_mask */
777 0xffff, /* dst_mask */
778 FALSE), /* pcrel_offset */
779
780 /* 16-bit upper half section relative relocation. */
781 HOWTO (R_PPC64_SECTOFF_HI, /* type */
782 16, /* rightshift */
783 1, /* size (0 = byte, 1 = short, 2 = long) */
784 16, /* bitsize */
785 FALSE, /* pc_relative */
786 0, /* bitpos */
787 complain_overflow_signed, /* complain_on_overflow */
788 ppc64_elf_sectoff_reloc, /* special_function */
789 "R_PPC64_SECTOFF_HI", /* name */
790 FALSE, /* partial_inplace */
791 0, /* src_mask */
792 0xffff, /* dst_mask */
793 FALSE), /* pcrel_offset */
794
795 /* 16-bit upper half adjusted section relative relocation. */
796 HOWTO (R_PPC64_SECTOFF_HA, /* type */
797 16, /* rightshift */
798 1, /* size (0 = byte, 1 = short, 2 = long) */
799 16, /* bitsize */
800 FALSE, /* pc_relative */
801 0, /* bitpos */
802 complain_overflow_signed, /* complain_on_overflow */
803 ppc64_elf_sectoff_ha_reloc, /* special_function */
804 "R_PPC64_SECTOFF_HA", /* name */
805 FALSE, /* partial_inplace */
806 0, /* src_mask */
807 0xffff, /* dst_mask */
808 FALSE), /* pcrel_offset */
809
810 /* Like R_PPC64_REL24 without touching the two least significant bits. */
811 HOWTO (R_PPC64_REL30, /* type */
812 2, /* rightshift */
813 2, /* size (0 = byte, 1 = short, 2 = long) */
814 30, /* bitsize */
815 TRUE, /* pc_relative */
816 0, /* bitpos */
817 complain_overflow_dont, /* complain_on_overflow */
818 bfd_elf_generic_reloc, /* special_function */
819 "R_PPC64_REL30", /* name */
820 FALSE, /* partial_inplace */
821 0, /* src_mask */
822 0xfffffffc, /* dst_mask */
823 TRUE), /* pcrel_offset */
824
825 /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
826
827 /* A standard 64-bit relocation. */
828 HOWTO (R_PPC64_ADDR64, /* type */
829 0, /* rightshift */
830 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
831 64, /* bitsize */
832 FALSE, /* pc_relative */
833 0, /* bitpos */
834 complain_overflow_dont, /* complain_on_overflow */
835 bfd_elf_generic_reloc, /* special_function */
836 "R_PPC64_ADDR64", /* name */
837 FALSE, /* partial_inplace */
838 0, /* src_mask */
839 ONES (64), /* dst_mask */
840 FALSE), /* pcrel_offset */
841
842 /* The bits 32-47 of an address. */
843 HOWTO (R_PPC64_ADDR16_HIGHER, /* type */
844 32, /* rightshift */
845 1, /* size (0 = byte, 1 = short, 2 = long) */
846 16, /* bitsize */
847 FALSE, /* pc_relative */
848 0, /* bitpos */
849 complain_overflow_dont, /* complain_on_overflow */
850 bfd_elf_generic_reloc, /* special_function */
851 "R_PPC64_ADDR16_HIGHER", /* name */
852 FALSE, /* partial_inplace */
853 0, /* src_mask */
854 0xffff, /* dst_mask */
855 FALSE), /* pcrel_offset */
856
857 /* The bits 32-47 of an address, plus 1 if the contents of the low
858 16 bits, treated as a signed number, is negative. */
859 HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */
860 32, /* rightshift */
861 1, /* size (0 = byte, 1 = short, 2 = long) */
862 16, /* bitsize */
863 FALSE, /* pc_relative */
864 0, /* bitpos */
865 complain_overflow_dont, /* complain_on_overflow */
866 ppc64_elf_ha_reloc, /* special_function */
867 "R_PPC64_ADDR16_HIGHERA", /* name */
868 FALSE, /* partial_inplace */
869 0, /* src_mask */
870 0xffff, /* dst_mask */
871 FALSE), /* pcrel_offset */
872
873 /* The bits 48-63 of an address. */
874 HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */
875 48, /* rightshift */
876 1, /* size (0 = byte, 1 = short, 2 = long) */
877 16, /* bitsize */
878 FALSE, /* pc_relative */
879 0, /* bitpos */
880 complain_overflow_dont, /* complain_on_overflow */
881 bfd_elf_generic_reloc, /* special_function */
882 "R_PPC64_ADDR16_HIGHEST", /* name */
883 FALSE, /* partial_inplace */
884 0, /* src_mask */
885 0xffff, /* dst_mask */
886 FALSE), /* pcrel_offset */
887
888 /* The bits 48-63 of an address, plus 1 if the contents of the low
889 16 bits, treated as a signed number, is negative. */
890 HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */
891 48, /* rightshift */
892 1, /* size (0 = byte, 1 = short, 2 = long) */
893 16, /* bitsize */
894 FALSE, /* pc_relative */
895 0, /* bitpos */
896 complain_overflow_dont, /* complain_on_overflow */
897 ppc64_elf_ha_reloc, /* special_function */
898 "R_PPC64_ADDR16_HIGHESTA", /* name */
899 FALSE, /* partial_inplace */
900 0, /* src_mask */
901 0xffff, /* dst_mask */
902 FALSE), /* pcrel_offset */
903
904 /* Like ADDR64, but may be unaligned. */
905 HOWTO (R_PPC64_UADDR64, /* type */
906 0, /* rightshift */
907 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
908 64, /* bitsize */
909 FALSE, /* pc_relative */
910 0, /* bitpos */
911 complain_overflow_dont, /* complain_on_overflow */
912 bfd_elf_generic_reloc, /* special_function */
913 "R_PPC64_UADDR64", /* name */
914 FALSE, /* partial_inplace */
915 0, /* src_mask */
916 ONES (64), /* dst_mask */
917 FALSE), /* pcrel_offset */
918
919 /* 64-bit relative relocation. */
920 HOWTO (R_PPC64_REL64, /* type */
921 0, /* rightshift */
922 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
923 64, /* bitsize */
924 TRUE, /* pc_relative */
925 0, /* bitpos */
926 complain_overflow_dont, /* complain_on_overflow */
927 bfd_elf_generic_reloc, /* special_function */
928 "R_PPC64_REL64", /* name */
929 FALSE, /* partial_inplace */
930 0, /* src_mask */
931 ONES (64), /* dst_mask */
932 TRUE), /* pcrel_offset */
933
934 /* 64-bit relocation to the symbol's procedure linkage table. */
935 HOWTO (R_PPC64_PLT64, /* type */
936 0, /* rightshift */
937 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
938 64, /* bitsize */
939 FALSE, /* pc_relative */
940 0, /* bitpos */
941 complain_overflow_dont, /* complain_on_overflow */
942 ppc64_elf_unhandled_reloc, /* special_function */
943 "R_PPC64_PLT64", /* name */
944 FALSE, /* partial_inplace */
945 0, /* src_mask */
946 ONES (64), /* dst_mask */
947 FALSE), /* pcrel_offset */
948
949 /* 64-bit PC relative relocation to the symbol's procedure linkage
950 table. */
951 /* FIXME: R_PPC64_PLTREL64 not supported. */
952 HOWTO (R_PPC64_PLTREL64, /* type */
953 0, /* rightshift */
954 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
955 64, /* bitsize */
956 TRUE, /* pc_relative */
957 0, /* bitpos */
958 complain_overflow_dont, /* complain_on_overflow */
959 ppc64_elf_unhandled_reloc, /* special_function */
960 "R_PPC64_PLTREL64", /* name */
961 FALSE, /* partial_inplace */
962 0, /* src_mask */
963 ONES (64), /* dst_mask */
964 TRUE), /* pcrel_offset */
965
966 /* 16 bit TOC-relative relocation. */
967
968 /* R_PPC64_TOC16 47 half16* S + A - .TOC. */
969 HOWTO (R_PPC64_TOC16, /* type */
970 0, /* rightshift */
971 1, /* size (0 = byte, 1 = short, 2 = long) */
972 16, /* bitsize */
973 FALSE, /* pc_relative */
974 0, /* bitpos */
975 complain_overflow_signed, /* complain_on_overflow */
976 ppc64_elf_toc_reloc, /* special_function */
977 "R_PPC64_TOC16", /* name */
978 FALSE, /* partial_inplace */
979 0, /* src_mask */
980 0xffff, /* dst_mask */
981 FALSE), /* pcrel_offset */
982
983 /* 16 bit TOC-relative relocation without overflow. */
984
985 /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
986 HOWTO (R_PPC64_TOC16_LO, /* type */
987 0, /* rightshift */
988 1, /* size (0 = byte, 1 = short, 2 = long) */
989 16, /* bitsize */
990 FALSE, /* pc_relative */
991 0, /* bitpos */
992 complain_overflow_dont, /* complain_on_overflow */
993 ppc64_elf_toc_reloc, /* special_function */
994 "R_PPC64_TOC16_LO", /* name */
995 FALSE, /* partial_inplace */
996 0, /* src_mask */
997 0xffff, /* dst_mask */
998 FALSE), /* pcrel_offset */
999
1000 /* 16 bit TOC-relative relocation, high 16 bits. */
1001
1002 /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
1003 HOWTO (R_PPC64_TOC16_HI, /* type */
1004 16, /* rightshift */
1005 1, /* size (0 = byte, 1 = short, 2 = long) */
1006 16, /* bitsize */
1007 FALSE, /* pc_relative */
1008 0, /* bitpos */
1009 complain_overflow_signed, /* complain_on_overflow */
1010 ppc64_elf_toc_reloc, /* special_function */
1011 "R_PPC64_TOC16_HI", /* name */
1012 FALSE, /* partial_inplace */
1013 0, /* src_mask */
1014 0xffff, /* dst_mask */
1015 FALSE), /* pcrel_offset */
1016
1017 /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the
1018 contents of the low 16 bits, treated as a signed number, is
1019 negative. */
1020
1021 /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
1022 HOWTO (R_PPC64_TOC16_HA, /* type */
1023 16, /* rightshift */
1024 1, /* size (0 = byte, 1 = short, 2 = long) */
1025 16, /* bitsize */
1026 FALSE, /* pc_relative */
1027 0, /* bitpos */
1028 complain_overflow_signed, /* complain_on_overflow */
1029 ppc64_elf_toc_ha_reloc, /* special_function */
1030 "R_PPC64_TOC16_HA", /* name */
1031 FALSE, /* partial_inplace */
1032 0, /* src_mask */
1033 0xffff, /* dst_mask */
1034 FALSE), /* pcrel_offset */
1035
1036 /* 64-bit relocation; insert value of TOC base (.TOC.). */
1037
1038 /* R_PPC64_TOC 51 doubleword64 .TOC. */
1039 HOWTO (R_PPC64_TOC, /* type */
1040 0, /* rightshift */
1041 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1042 64, /* bitsize */
1043 FALSE, /* pc_relative */
1044 0, /* bitpos */
1045 complain_overflow_dont, /* complain_on_overflow */
1046 ppc64_elf_toc64_reloc, /* special_function */
1047 "R_PPC64_TOC", /* name */
1048 FALSE, /* partial_inplace */
1049 0, /* src_mask */
1050 ONES (64), /* dst_mask */
1051 FALSE), /* pcrel_offset */
1052
1053 /* Like R_PPC64_GOT16, but also informs the link editor that the
1054 value to relocate may (!) refer to a PLT entry which the link
1055 editor (a) may replace with the symbol value. If the link editor
1056 is unable to fully resolve the symbol, it may (b) create a PLT
1057 entry and store the address to the new PLT entry in the GOT.
1058 This permits lazy resolution of function symbols at run time.
1059 The link editor may also skip all of this and just (c) emit a
1060 R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
1061 /* FIXME: R_PPC64_PLTGOT16 not implemented. */
1062 HOWTO (R_PPC64_PLTGOT16, /* type */
1063 0, /* rightshift */
1064 1, /* size (0 = byte, 1 = short, 2 = long) */
1065 16, /* bitsize */
1066 FALSE, /* pc_relative */
1067 0, /* bitpos */
1068 complain_overflow_signed, /* complain_on_overflow */
1069 ppc64_elf_unhandled_reloc, /* special_function */
1070 "R_PPC64_PLTGOT16", /* name */
1071 FALSE, /* partial_inplace */
1072 0, /* src_mask */
1073 0xffff, /* dst_mask */
1074 FALSE), /* pcrel_offset */
1075
1076 /* Like R_PPC64_PLTGOT16, but without overflow. */
1077 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1078 HOWTO (R_PPC64_PLTGOT16_LO, /* type */
1079 0, /* rightshift */
1080 1, /* size (0 = byte, 1 = short, 2 = long) */
1081 16, /* bitsize */
1082 FALSE, /* pc_relative */
1083 0, /* bitpos */
1084 complain_overflow_dont, /* complain_on_overflow */
1085 ppc64_elf_unhandled_reloc, /* special_function */
1086 "R_PPC64_PLTGOT16_LO", /* name */
1087 FALSE, /* partial_inplace */
1088 0, /* src_mask */
1089 0xffff, /* dst_mask */
1090 FALSE), /* pcrel_offset */
1091
1092 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */
1093 /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */
1094 HOWTO (R_PPC64_PLTGOT16_HI, /* type */
1095 16, /* rightshift */
1096 1, /* size (0 = byte, 1 = short, 2 = long) */
1097 16, /* bitsize */
1098 FALSE, /* pc_relative */
1099 0, /* bitpos */
1100 complain_overflow_signed, /* complain_on_overflow */
1101 ppc64_elf_unhandled_reloc, /* special_function */
1102 "R_PPC64_PLTGOT16_HI", /* name */
1103 FALSE, /* partial_inplace */
1104 0, /* src_mask */
1105 0xffff, /* dst_mask */
1106 FALSE), /* pcrel_offset */
1107
1108 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus
1109 1 if the contents of the low 16 bits, treated as a signed number,
1110 is negative. */
1111 /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */
1112 HOWTO (R_PPC64_PLTGOT16_HA, /* type */
1113 16, /* rightshift */
1114 1, /* size (0 = byte, 1 = short, 2 = long) */
1115 16, /* bitsize */
1116 FALSE, /* pc_relative */
1117 0, /* bitpos */
1118 complain_overflow_signed, /* complain_on_overflow */
1119 ppc64_elf_unhandled_reloc, /* special_function */
1120 "R_PPC64_PLTGOT16_HA", /* name */
1121 FALSE, /* partial_inplace */
1122 0, /* src_mask */
1123 0xffff, /* dst_mask */
1124 FALSE), /* pcrel_offset */
1125
1126 /* Like R_PPC64_ADDR16, but for instructions with a DS field. */
1127 HOWTO (R_PPC64_ADDR16_DS, /* type */
1128 0, /* rightshift */
1129 1, /* size (0 = byte, 1 = short, 2 = long) */
1130 16, /* bitsize */
1131 FALSE, /* pc_relative */
1132 0, /* bitpos */
1133 complain_overflow_signed, /* complain_on_overflow */
1134 bfd_elf_generic_reloc, /* special_function */
1135 "R_PPC64_ADDR16_DS", /* name */
1136 FALSE, /* partial_inplace */
1137 0, /* src_mask */
1138 0xfffc, /* dst_mask */
1139 FALSE), /* pcrel_offset */
1140
1141 /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
1142 HOWTO (R_PPC64_ADDR16_LO_DS, /* type */
1143 0, /* rightshift */
1144 1, /* size (0 = byte, 1 = short, 2 = long) */
1145 16, /* bitsize */
1146 FALSE, /* pc_relative */
1147 0, /* bitpos */
1148 complain_overflow_dont,/* complain_on_overflow */
1149 bfd_elf_generic_reloc, /* special_function */
1150 "R_PPC64_ADDR16_LO_DS",/* name */
1151 FALSE, /* partial_inplace */
1152 0, /* src_mask */
1153 0xfffc, /* dst_mask */
1154 FALSE), /* pcrel_offset */
1155
1156 /* Like R_PPC64_GOT16, but for instructions with a DS field. */
1157 HOWTO (R_PPC64_GOT16_DS, /* type */
1158 0, /* rightshift */
1159 1, /* size (0 = byte, 1 = short, 2 = long) */
1160 16, /* bitsize */
1161 FALSE, /* pc_relative */
1162 0, /* bitpos */
1163 complain_overflow_signed, /* complain_on_overflow */
1164 ppc64_elf_unhandled_reloc, /* special_function */
1165 "R_PPC64_GOT16_DS", /* name */
1166 FALSE, /* partial_inplace */
1167 0, /* src_mask */
1168 0xfffc, /* dst_mask */
1169 FALSE), /* pcrel_offset */
1170
1171 /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
1172 HOWTO (R_PPC64_GOT16_LO_DS, /* type */
1173 0, /* rightshift */
1174 1, /* size (0 = byte, 1 = short, 2 = long) */
1175 16, /* bitsize */
1176 FALSE, /* pc_relative */
1177 0, /* bitpos */
1178 complain_overflow_dont, /* complain_on_overflow */
1179 ppc64_elf_unhandled_reloc, /* special_function */
1180 "R_PPC64_GOT16_LO_DS", /* name */
1181 FALSE, /* partial_inplace */
1182 0, /* src_mask */
1183 0xfffc, /* dst_mask */
1184 FALSE), /* pcrel_offset */
1185
1186 /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
1187 HOWTO (R_PPC64_PLT16_LO_DS, /* type */
1188 0, /* rightshift */
1189 1, /* size (0 = byte, 1 = short, 2 = long) */
1190 16, /* bitsize */
1191 FALSE, /* pc_relative */
1192 0, /* bitpos */
1193 complain_overflow_dont, /* complain_on_overflow */
1194 ppc64_elf_unhandled_reloc, /* special_function */
1195 "R_PPC64_PLT16_LO_DS", /* name */
1196 FALSE, /* partial_inplace */
1197 0, /* src_mask */
1198 0xfffc, /* dst_mask */
1199 FALSE), /* pcrel_offset */
1200
1201 /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
1202 HOWTO (R_PPC64_SECTOFF_DS, /* type */
1203 0, /* rightshift */
1204 1, /* size (0 = byte, 1 = short, 2 = long) */
1205 16, /* bitsize */
1206 FALSE, /* pc_relative */
1207 0, /* bitpos */
1208 complain_overflow_signed, /* complain_on_overflow */
1209 ppc64_elf_sectoff_reloc, /* special_function */
1210 "R_PPC64_SECTOFF_DS", /* name */
1211 FALSE, /* partial_inplace */
1212 0, /* src_mask */
1213 0xfffc, /* dst_mask */
1214 FALSE), /* pcrel_offset */
1215
1216 /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
1217 HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */
1218 0, /* rightshift */
1219 1, /* size (0 = byte, 1 = short, 2 = long) */
1220 16, /* bitsize */
1221 FALSE, /* pc_relative */
1222 0, /* bitpos */
1223 complain_overflow_dont, /* complain_on_overflow */
1224 ppc64_elf_sectoff_reloc, /* special_function */
1225 "R_PPC64_SECTOFF_LO_DS",/* name */
1226 FALSE, /* partial_inplace */
1227 0, /* src_mask */
1228 0xfffc, /* dst_mask */
1229 FALSE), /* pcrel_offset */
1230
1231 /* Like R_PPC64_TOC16, but for instructions with a DS field. */
1232 HOWTO (R_PPC64_TOC16_DS, /* type */
1233 0, /* rightshift */
1234 1, /* size (0 = byte, 1 = short, 2 = long) */
1235 16, /* bitsize */
1236 FALSE, /* pc_relative */
1237 0, /* bitpos */
1238 complain_overflow_signed, /* complain_on_overflow */
1239 ppc64_elf_toc_reloc, /* special_function */
1240 "R_PPC64_TOC16_DS", /* name */
1241 FALSE, /* partial_inplace */
1242 0, /* src_mask */
1243 0xfffc, /* dst_mask */
1244 FALSE), /* pcrel_offset */
1245
1246 /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
1247 HOWTO (R_PPC64_TOC16_LO_DS, /* type */
1248 0, /* rightshift */
1249 1, /* size (0 = byte, 1 = short, 2 = long) */
1250 16, /* bitsize */
1251 FALSE, /* pc_relative */
1252 0, /* bitpos */
1253 complain_overflow_dont, /* complain_on_overflow */
1254 ppc64_elf_toc_reloc, /* special_function */
1255 "R_PPC64_TOC16_LO_DS", /* name */
1256 FALSE, /* partial_inplace */
1257 0, /* src_mask */
1258 0xfffc, /* dst_mask */
1259 FALSE), /* pcrel_offset */
1260
1261 /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
1262 /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
1263 HOWTO (R_PPC64_PLTGOT16_DS, /* type */
1264 0, /* rightshift */
1265 1, /* size (0 = byte, 1 = short, 2 = long) */
1266 16, /* bitsize */
1267 FALSE, /* pc_relative */
1268 0, /* bitpos */
1269 complain_overflow_signed, /* complain_on_overflow */
1270 ppc64_elf_unhandled_reloc, /* special_function */
1271 "R_PPC64_PLTGOT16_DS", /* name */
1272 FALSE, /* partial_inplace */
1273 0, /* src_mask */
1274 0xfffc, /* dst_mask */
1275 FALSE), /* pcrel_offset */
1276
1277 /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */
1278 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1279 HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */
1280 0, /* rightshift */
1281 1, /* size (0 = byte, 1 = short, 2 = long) */
1282 16, /* bitsize */
1283 FALSE, /* pc_relative */
1284 0, /* bitpos */
1285 complain_overflow_dont, /* complain_on_overflow */
1286 ppc64_elf_unhandled_reloc, /* special_function */
1287 "R_PPC64_PLTGOT16_LO_DS",/* name */
1288 FALSE, /* partial_inplace */
1289 0, /* src_mask */
1290 0xfffc, /* dst_mask */
1291 FALSE), /* pcrel_offset */
1292
1293 /* Marker relocs for TLS. */
1294 HOWTO (R_PPC64_TLS,
1295 0, /* rightshift */
1296 2, /* size (0 = byte, 1 = short, 2 = long) */
1297 32, /* bitsize */
1298 FALSE, /* pc_relative */
1299 0, /* bitpos */
1300 complain_overflow_dont, /* complain_on_overflow */
1301 bfd_elf_generic_reloc, /* special_function */
1302 "R_PPC64_TLS", /* name */
1303 FALSE, /* partial_inplace */
1304 0, /* src_mask */
1305 0, /* dst_mask */
1306 FALSE), /* pcrel_offset */
1307
1308 HOWTO (R_PPC64_TLSGD,
1309 0, /* rightshift */
1310 2, /* size (0 = byte, 1 = short, 2 = long) */
1311 32, /* bitsize */
1312 FALSE, /* pc_relative */
1313 0, /* bitpos */
1314 complain_overflow_dont, /* complain_on_overflow */
1315 bfd_elf_generic_reloc, /* special_function */
1316 "R_PPC64_TLSGD", /* name */
1317 FALSE, /* partial_inplace */
1318 0, /* src_mask */
1319 0, /* dst_mask */
1320 FALSE), /* pcrel_offset */
1321
1322 HOWTO (R_PPC64_TLSLD,
1323 0, /* rightshift */
1324 2, /* size (0 = byte, 1 = short, 2 = long) */
1325 32, /* bitsize */
1326 FALSE, /* pc_relative */
1327 0, /* bitpos */
1328 complain_overflow_dont, /* complain_on_overflow */
1329 bfd_elf_generic_reloc, /* special_function */
1330 "R_PPC64_TLSLD", /* name */
1331 FALSE, /* partial_inplace */
1332 0, /* src_mask */
1333 0, /* dst_mask */
1334 FALSE), /* pcrel_offset */
1335
1336 HOWTO (R_PPC64_TOCSAVE,
1337 0, /* rightshift */
1338 2, /* size (0 = byte, 1 = short, 2 = long) */
1339 32, /* bitsize */
1340 FALSE, /* pc_relative */
1341 0, /* bitpos */
1342 complain_overflow_dont, /* complain_on_overflow */
1343 bfd_elf_generic_reloc, /* special_function */
1344 "R_PPC64_TOCSAVE", /* name */
1345 FALSE, /* partial_inplace */
1346 0, /* src_mask */
1347 0, /* dst_mask */
1348 FALSE), /* pcrel_offset */
1349
1350 /* Computes the load module index of the load module that contains the
1351 definition of its TLS sym. */
1352 HOWTO (R_PPC64_DTPMOD64,
1353 0, /* rightshift */
1354 4, /* size (0 = byte, 1 = short, 2 = long) */
1355 64, /* bitsize */
1356 FALSE, /* pc_relative */
1357 0, /* bitpos */
1358 complain_overflow_dont, /* complain_on_overflow */
1359 ppc64_elf_unhandled_reloc, /* special_function */
1360 "R_PPC64_DTPMOD64", /* name */
1361 FALSE, /* partial_inplace */
1362 0, /* src_mask */
1363 ONES (64), /* dst_mask */
1364 FALSE), /* pcrel_offset */
1365
1366 /* Computes a dtv-relative displacement, the difference between the value
1367 of sym+add and the base address of the thread-local storage block that
1368 contains the definition of sym, minus 0x8000. */
1369 HOWTO (R_PPC64_DTPREL64,
1370 0, /* rightshift */
1371 4, /* size (0 = byte, 1 = short, 2 = long) */
1372 64, /* bitsize */
1373 FALSE, /* pc_relative */
1374 0, /* bitpos */
1375 complain_overflow_dont, /* complain_on_overflow */
1376 ppc64_elf_unhandled_reloc, /* special_function */
1377 "R_PPC64_DTPREL64", /* name */
1378 FALSE, /* partial_inplace */
1379 0, /* src_mask */
1380 ONES (64), /* dst_mask */
1381 FALSE), /* pcrel_offset */
1382
1383 /* A 16 bit dtprel reloc. */
1384 HOWTO (R_PPC64_DTPREL16,
1385 0, /* rightshift */
1386 1, /* size (0 = byte, 1 = short, 2 = long) */
1387 16, /* bitsize */
1388 FALSE, /* pc_relative */
1389 0, /* bitpos */
1390 complain_overflow_signed, /* complain_on_overflow */
1391 ppc64_elf_unhandled_reloc, /* special_function */
1392 "R_PPC64_DTPREL16", /* name */
1393 FALSE, /* partial_inplace */
1394 0, /* src_mask */
1395 0xffff, /* dst_mask */
1396 FALSE), /* pcrel_offset */
1397
1398 /* Like DTPREL16, but no overflow. */
1399 HOWTO (R_PPC64_DTPREL16_LO,
1400 0, /* rightshift */
1401 1, /* size (0 = byte, 1 = short, 2 = long) */
1402 16, /* bitsize */
1403 FALSE, /* pc_relative */
1404 0, /* bitpos */
1405 complain_overflow_dont, /* complain_on_overflow */
1406 ppc64_elf_unhandled_reloc, /* special_function */
1407 "R_PPC64_DTPREL16_LO", /* name */
1408 FALSE, /* partial_inplace */
1409 0, /* src_mask */
1410 0xffff, /* dst_mask */
1411 FALSE), /* pcrel_offset */
1412
1413 /* Like DTPREL16_LO, but next higher group of 16 bits. */
1414 HOWTO (R_PPC64_DTPREL16_HI,
1415 16, /* rightshift */
1416 1, /* size (0 = byte, 1 = short, 2 = long) */
1417 16, /* bitsize */
1418 FALSE, /* pc_relative */
1419 0, /* bitpos */
1420 complain_overflow_signed, /* complain_on_overflow */
1421 ppc64_elf_unhandled_reloc, /* special_function */
1422 "R_PPC64_DTPREL16_HI", /* name */
1423 FALSE, /* partial_inplace */
1424 0, /* src_mask */
1425 0xffff, /* dst_mask */
1426 FALSE), /* pcrel_offset */
1427
1428 /* Like DTPREL16_HI, but adjust for low 16 bits. */
1429 HOWTO (R_PPC64_DTPREL16_HA,
1430 16, /* rightshift */
1431 1, /* size (0 = byte, 1 = short, 2 = long) */
1432 16, /* bitsize */
1433 FALSE, /* pc_relative */
1434 0, /* bitpos */
1435 complain_overflow_signed, /* complain_on_overflow */
1436 ppc64_elf_unhandled_reloc, /* special_function */
1437 "R_PPC64_DTPREL16_HA", /* name */
1438 FALSE, /* partial_inplace */
1439 0, /* src_mask */
1440 0xffff, /* dst_mask */
1441 FALSE), /* pcrel_offset */
1442
1443 /* Like DTPREL16_HI, but next higher group of 16 bits. */
1444 HOWTO (R_PPC64_DTPREL16_HIGHER,
1445 32, /* rightshift */
1446 1, /* size (0 = byte, 1 = short, 2 = long) */
1447 16, /* bitsize */
1448 FALSE, /* pc_relative */
1449 0, /* bitpos */
1450 complain_overflow_dont, /* complain_on_overflow */
1451 ppc64_elf_unhandled_reloc, /* special_function */
1452 "R_PPC64_DTPREL16_HIGHER", /* name */
1453 FALSE, /* partial_inplace */
1454 0, /* src_mask */
1455 0xffff, /* dst_mask */
1456 FALSE), /* pcrel_offset */
1457
1458 /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */
1459 HOWTO (R_PPC64_DTPREL16_HIGHERA,
1460 32, /* rightshift */
1461 1, /* size (0 = byte, 1 = short, 2 = long) */
1462 16, /* bitsize */
1463 FALSE, /* pc_relative */
1464 0, /* bitpos */
1465 complain_overflow_dont, /* complain_on_overflow */
1466 ppc64_elf_unhandled_reloc, /* special_function */
1467 "R_PPC64_DTPREL16_HIGHERA", /* name */
1468 FALSE, /* partial_inplace */
1469 0, /* src_mask */
1470 0xffff, /* dst_mask */
1471 FALSE), /* pcrel_offset */
1472
1473 /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */
1474 HOWTO (R_PPC64_DTPREL16_HIGHEST,
1475 48, /* rightshift */
1476 1, /* size (0 = byte, 1 = short, 2 = long) */
1477 16, /* bitsize */
1478 FALSE, /* pc_relative */
1479 0, /* bitpos */
1480 complain_overflow_dont, /* complain_on_overflow */
1481 ppc64_elf_unhandled_reloc, /* special_function */
1482 "R_PPC64_DTPREL16_HIGHEST", /* name */
1483 FALSE, /* partial_inplace */
1484 0, /* src_mask */
1485 0xffff, /* dst_mask */
1486 FALSE), /* pcrel_offset */
1487
1488 /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */
1489 HOWTO (R_PPC64_DTPREL16_HIGHESTA,
1490 48, /* rightshift */
1491 1, /* size (0 = byte, 1 = short, 2 = long) */
1492 16, /* bitsize */
1493 FALSE, /* pc_relative */
1494 0, /* bitpos */
1495 complain_overflow_dont, /* complain_on_overflow */
1496 ppc64_elf_unhandled_reloc, /* special_function */
1497 "R_PPC64_DTPREL16_HIGHESTA", /* name */
1498 FALSE, /* partial_inplace */
1499 0, /* src_mask */
1500 0xffff, /* dst_mask */
1501 FALSE), /* pcrel_offset */
1502
1503 /* Like DTPREL16, but for insns with a DS field. */
1504 HOWTO (R_PPC64_DTPREL16_DS,
1505 0, /* rightshift */
1506 1, /* size (0 = byte, 1 = short, 2 = long) */
1507 16, /* bitsize */
1508 FALSE, /* pc_relative */
1509 0, /* bitpos */
1510 complain_overflow_signed, /* complain_on_overflow */
1511 ppc64_elf_unhandled_reloc, /* special_function */
1512 "R_PPC64_DTPREL16_DS", /* name */
1513 FALSE, /* partial_inplace */
1514 0, /* src_mask */
1515 0xfffc, /* dst_mask */
1516 FALSE), /* pcrel_offset */
1517
1518 /* Like DTPREL16_DS, but no overflow. */
1519 HOWTO (R_PPC64_DTPREL16_LO_DS,
1520 0, /* rightshift */
1521 1, /* size (0 = byte, 1 = short, 2 = long) */
1522 16, /* bitsize */
1523 FALSE, /* pc_relative */
1524 0, /* bitpos */
1525 complain_overflow_dont, /* complain_on_overflow */
1526 ppc64_elf_unhandled_reloc, /* special_function */
1527 "R_PPC64_DTPREL16_LO_DS", /* name */
1528 FALSE, /* partial_inplace */
1529 0, /* src_mask */
1530 0xfffc, /* dst_mask */
1531 FALSE), /* pcrel_offset */
1532
1533 /* Computes a tp-relative displacement, the difference between the value of
1534 sym+add and the value of the thread pointer (r13). */
1535 HOWTO (R_PPC64_TPREL64,
1536 0, /* rightshift */
1537 4, /* size (0 = byte, 1 = short, 2 = long) */
1538 64, /* bitsize */
1539 FALSE, /* pc_relative */
1540 0, /* bitpos */
1541 complain_overflow_dont, /* complain_on_overflow */
1542 ppc64_elf_unhandled_reloc, /* special_function */
1543 "R_PPC64_TPREL64", /* name */
1544 FALSE, /* partial_inplace */
1545 0, /* src_mask */
1546 ONES (64), /* dst_mask */
1547 FALSE), /* pcrel_offset */
1548
1549 /* A 16 bit tprel reloc. */
1550 HOWTO (R_PPC64_TPREL16,
1551 0, /* rightshift */
1552 1, /* size (0 = byte, 1 = short, 2 = long) */
1553 16, /* bitsize */
1554 FALSE, /* pc_relative */
1555 0, /* bitpos */
1556 complain_overflow_signed, /* complain_on_overflow */
1557 ppc64_elf_unhandled_reloc, /* special_function */
1558 "R_PPC64_TPREL16", /* name */
1559 FALSE, /* partial_inplace */
1560 0, /* src_mask */
1561 0xffff, /* dst_mask */
1562 FALSE), /* pcrel_offset */
1563
1564 /* Like TPREL16, but no overflow. */
1565 HOWTO (R_PPC64_TPREL16_LO,
1566 0, /* rightshift */
1567 1, /* size (0 = byte, 1 = short, 2 = long) */
1568 16, /* bitsize */
1569 FALSE, /* pc_relative */
1570 0, /* bitpos */
1571 complain_overflow_dont, /* complain_on_overflow */
1572 ppc64_elf_unhandled_reloc, /* special_function */
1573 "R_PPC64_TPREL16_LO", /* name */
1574 FALSE, /* partial_inplace */
1575 0, /* src_mask */
1576 0xffff, /* dst_mask */
1577 FALSE), /* pcrel_offset */
1578
1579 /* Like TPREL16_LO, but next higher group of 16 bits. */
1580 HOWTO (R_PPC64_TPREL16_HI,
1581 16, /* rightshift */
1582 1, /* size (0 = byte, 1 = short, 2 = long) */
1583 16, /* bitsize */
1584 FALSE, /* pc_relative */
1585 0, /* bitpos */
1586 complain_overflow_signed, /* complain_on_overflow */
1587 ppc64_elf_unhandled_reloc, /* special_function */
1588 "R_PPC64_TPREL16_HI", /* name */
1589 FALSE, /* partial_inplace */
1590 0, /* src_mask */
1591 0xffff, /* dst_mask */
1592 FALSE), /* pcrel_offset */
1593
1594 /* Like TPREL16_HI, but adjust for low 16 bits. */
1595 HOWTO (R_PPC64_TPREL16_HA,
1596 16, /* rightshift */
1597 1, /* size (0 = byte, 1 = short, 2 = long) */
1598 16, /* bitsize */
1599 FALSE, /* pc_relative */
1600 0, /* bitpos */
1601 complain_overflow_signed, /* complain_on_overflow */
1602 ppc64_elf_unhandled_reloc, /* special_function */
1603 "R_PPC64_TPREL16_HA", /* name */
1604 FALSE, /* partial_inplace */
1605 0, /* src_mask */
1606 0xffff, /* dst_mask */
1607 FALSE), /* pcrel_offset */
1608
1609 /* Like TPREL16_HI, but next higher group of 16 bits. */
1610 HOWTO (R_PPC64_TPREL16_HIGHER,
1611 32, /* rightshift */
1612 1, /* size (0 = byte, 1 = short, 2 = long) */
1613 16, /* bitsize */
1614 FALSE, /* pc_relative */
1615 0, /* bitpos */
1616 complain_overflow_dont, /* complain_on_overflow */
1617 ppc64_elf_unhandled_reloc, /* special_function */
1618 "R_PPC64_TPREL16_HIGHER", /* name */
1619 FALSE, /* partial_inplace */
1620 0, /* src_mask */
1621 0xffff, /* dst_mask */
1622 FALSE), /* pcrel_offset */
1623
1624 /* Like TPREL16_HIGHER, but adjust for low 16 bits. */
1625 HOWTO (R_PPC64_TPREL16_HIGHERA,
1626 32, /* rightshift */
1627 1, /* size (0 = byte, 1 = short, 2 = long) */
1628 16, /* bitsize */
1629 FALSE, /* pc_relative */
1630 0, /* bitpos */
1631 complain_overflow_dont, /* complain_on_overflow */
1632 ppc64_elf_unhandled_reloc, /* special_function */
1633 "R_PPC64_TPREL16_HIGHERA", /* name */
1634 FALSE, /* partial_inplace */
1635 0, /* src_mask */
1636 0xffff, /* dst_mask */
1637 FALSE), /* pcrel_offset */
1638
1639 /* Like TPREL16_HIGHER, but next higher group of 16 bits. */
1640 HOWTO (R_PPC64_TPREL16_HIGHEST,
1641 48, /* rightshift */
1642 1, /* size (0 = byte, 1 = short, 2 = long) */
1643 16, /* bitsize */
1644 FALSE, /* pc_relative */
1645 0, /* bitpos */
1646 complain_overflow_dont, /* complain_on_overflow */
1647 ppc64_elf_unhandled_reloc, /* special_function */
1648 "R_PPC64_TPREL16_HIGHEST", /* name */
1649 FALSE, /* partial_inplace */
1650 0, /* src_mask */
1651 0xffff, /* dst_mask */
1652 FALSE), /* pcrel_offset */
1653
1654 /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */
1655 HOWTO (R_PPC64_TPREL16_HIGHESTA,
1656 48, /* rightshift */
1657 1, /* size (0 = byte, 1 = short, 2 = long) */
1658 16, /* bitsize */
1659 FALSE, /* pc_relative */
1660 0, /* bitpos */
1661 complain_overflow_dont, /* complain_on_overflow */
1662 ppc64_elf_unhandled_reloc, /* special_function */
1663 "R_PPC64_TPREL16_HIGHESTA", /* name */
1664 FALSE, /* partial_inplace */
1665 0, /* src_mask */
1666 0xffff, /* dst_mask */
1667 FALSE), /* pcrel_offset */
1668
1669 /* Like TPREL16, but for insns with a DS field. */
1670 HOWTO (R_PPC64_TPREL16_DS,
1671 0, /* rightshift */
1672 1, /* size (0 = byte, 1 = short, 2 = long) */
1673 16, /* bitsize */
1674 FALSE, /* pc_relative */
1675 0, /* bitpos */
1676 complain_overflow_signed, /* complain_on_overflow */
1677 ppc64_elf_unhandled_reloc, /* special_function */
1678 "R_PPC64_TPREL16_DS", /* name */
1679 FALSE, /* partial_inplace */
1680 0, /* src_mask */
1681 0xfffc, /* dst_mask */
1682 FALSE), /* pcrel_offset */
1683
1684 /* Like TPREL16_DS, but no overflow. */
1685 HOWTO (R_PPC64_TPREL16_LO_DS,
1686 0, /* rightshift */
1687 1, /* size (0 = byte, 1 = short, 2 = long) */
1688 16, /* bitsize */
1689 FALSE, /* pc_relative */
1690 0, /* bitpos */
1691 complain_overflow_dont, /* complain_on_overflow */
1692 ppc64_elf_unhandled_reloc, /* special_function */
1693 "R_PPC64_TPREL16_LO_DS", /* name */
1694 FALSE, /* partial_inplace */
1695 0, /* src_mask */
1696 0xfffc, /* dst_mask */
1697 FALSE), /* pcrel_offset */
1698
1699 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1700 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1701 to the first entry relative to the TOC base (r2). */
1702 HOWTO (R_PPC64_GOT_TLSGD16,
1703 0, /* rightshift */
1704 1, /* size (0 = byte, 1 = short, 2 = long) */
1705 16, /* bitsize */
1706 FALSE, /* pc_relative */
1707 0, /* bitpos */
1708 complain_overflow_signed, /* complain_on_overflow */
1709 ppc64_elf_unhandled_reloc, /* special_function */
1710 "R_PPC64_GOT_TLSGD16", /* name */
1711 FALSE, /* partial_inplace */
1712 0, /* src_mask */
1713 0xffff, /* dst_mask */
1714 FALSE), /* pcrel_offset */
1715
1716 /* Like GOT_TLSGD16, but no overflow. */
1717 HOWTO (R_PPC64_GOT_TLSGD16_LO,
1718 0, /* rightshift */
1719 1, /* size (0 = byte, 1 = short, 2 = long) */
1720 16, /* bitsize */
1721 FALSE, /* pc_relative */
1722 0, /* bitpos */
1723 complain_overflow_dont, /* complain_on_overflow */
1724 ppc64_elf_unhandled_reloc, /* special_function */
1725 "R_PPC64_GOT_TLSGD16_LO", /* name */
1726 FALSE, /* partial_inplace */
1727 0, /* src_mask */
1728 0xffff, /* dst_mask */
1729 FALSE), /* pcrel_offset */
1730
1731 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1732 HOWTO (R_PPC64_GOT_TLSGD16_HI,
1733 16, /* rightshift */
1734 1, /* size (0 = byte, 1 = short, 2 = long) */
1735 16, /* bitsize */
1736 FALSE, /* pc_relative */
1737 0, /* bitpos */
1738 complain_overflow_signed, /* complain_on_overflow */
1739 ppc64_elf_unhandled_reloc, /* special_function */
1740 "R_PPC64_GOT_TLSGD16_HI", /* name */
1741 FALSE, /* partial_inplace */
1742 0, /* src_mask */
1743 0xffff, /* dst_mask */
1744 FALSE), /* pcrel_offset */
1745
1746 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1747 HOWTO (R_PPC64_GOT_TLSGD16_HA,
1748 16, /* rightshift */
1749 1, /* size (0 = byte, 1 = short, 2 = long) */
1750 16, /* bitsize */
1751 FALSE, /* pc_relative */
1752 0, /* bitpos */
1753 complain_overflow_signed, /* complain_on_overflow */
1754 ppc64_elf_unhandled_reloc, /* special_function */
1755 "R_PPC64_GOT_TLSGD16_HA", /* name */
1756 FALSE, /* partial_inplace */
1757 0, /* src_mask */
1758 0xffff, /* dst_mask */
1759 FALSE), /* pcrel_offset */
1760
1761 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1762 with values (sym+add)@dtpmod and zero, and computes the offset to the
1763 first entry relative to the TOC base (r2). */
1764 HOWTO (R_PPC64_GOT_TLSLD16,
1765 0, /* rightshift */
1766 1, /* size (0 = byte, 1 = short, 2 = long) */
1767 16, /* bitsize */
1768 FALSE, /* pc_relative */
1769 0, /* bitpos */
1770 complain_overflow_signed, /* complain_on_overflow */
1771 ppc64_elf_unhandled_reloc, /* special_function */
1772 "R_PPC64_GOT_TLSLD16", /* name */
1773 FALSE, /* partial_inplace */
1774 0, /* src_mask */
1775 0xffff, /* dst_mask */
1776 FALSE), /* pcrel_offset */
1777
1778 /* Like GOT_TLSLD16, but no overflow. */
1779 HOWTO (R_PPC64_GOT_TLSLD16_LO,
1780 0, /* rightshift */
1781 1, /* size (0 = byte, 1 = short, 2 = long) */
1782 16, /* bitsize */
1783 FALSE, /* pc_relative */
1784 0, /* bitpos */
1785 complain_overflow_dont, /* complain_on_overflow */
1786 ppc64_elf_unhandled_reloc, /* special_function */
1787 "R_PPC64_GOT_TLSLD16_LO", /* name */
1788 FALSE, /* partial_inplace */
1789 0, /* src_mask */
1790 0xffff, /* dst_mask */
1791 FALSE), /* pcrel_offset */
1792
1793 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1794 HOWTO (R_PPC64_GOT_TLSLD16_HI,
1795 16, /* rightshift */
1796 1, /* size (0 = byte, 1 = short, 2 = long) */
1797 16, /* bitsize */
1798 FALSE, /* pc_relative */
1799 0, /* bitpos */
1800 complain_overflow_signed, /* complain_on_overflow */
1801 ppc64_elf_unhandled_reloc, /* special_function */
1802 "R_PPC64_GOT_TLSLD16_HI", /* name */
1803 FALSE, /* partial_inplace */
1804 0, /* src_mask */
1805 0xffff, /* dst_mask */
1806 FALSE), /* pcrel_offset */
1807
1808 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1809 HOWTO (R_PPC64_GOT_TLSLD16_HA,
1810 16, /* rightshift */
1811 1, /* size (0 = byte, 1 = short, 2 = long) */
1812 16, /* bitsize */
1813 FALSE, /* pc_relative */
1814 0, /* bitpos */
1815 complain_overflow_signed, /* complain_on_overflow */
1816 ppc64_elf_unhandled_reloc, /* special_function */
1817 "R_PPC64_GOT_TLSLD16_HA", /* name */
1818 FALSE, /* partial_inplace */
1819 0, /* src_mask */
1820 0xffff, /* dst_mask */
1821 FALSE), /* pcrel_offset */
1822
1823 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1824 the offset to the entry relative to the TOC base (r2). */
1825 HOWTO (R_PPC64_GOT_DTPREL16_DS,
1826 0, /* rightshift */
1827 1, /* size (0 = byte, 1 = short, 2 = long) */
1828 16, /* bitsize */
1829 FALSE, /* pc_relative */
1830 0, /* bitpos */
1831 complain_overflow_signed, /* complain_on_overflow */
1832 ppc64_elf_unhandled_reloc, /* special_function */
1833 "R_PPC64_GOT_DTPREL16_DS", /* name */
1834 FALSE, /* partial_inplace */
1835 0, /* src_mask */
1836 0xfffc, /* dst_mask */
1837 FALSE), /* pcrel_offset */
1838
1839 /* Like GOT_DTPREL16_DS, but no overflow. */
1840 HOWTO (R_PPC64_GOT_DTPREL16_LO_DS,
1841 0, /* rightshift */
1842 1, /* size (0 = byte, 1 = short, 2 = long) */
1843 16, /* bitsize */
1844 FALSE, /* pc_relative */
1845 0, /* bitpos */
1846 complain_overflow_dont, /* complain_on_overflow */
1847 ppc64_elf_unhandled_reloc, /* special_function */
1848 "R_PPC64_GOT_DTPREL16_LO_DS", /* name */
1849 FALSE, /* partial_inplace */
1850 0, /* src_mask */
1851 0xfffc, /* dst_mask */
1852 FALSE), /* pcrel_offset */
1853
1854 /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */
1855 HOWTO (R_PPC64_GOT_DTPREL16_HI,
1856 16, /* rightshift */
1857 1, /* size (0 = byte, 1 = short, 2 = long) */
1858 16, /* bitsize */
1859 FALSE, /* pc_relative */
1860 0, /* bitpos */
1861 complain_overflow_signed, /* complain_on_overflow */
1862 ppc64_elf_unhandled_reloc, /* special_function */
1863 "R_PPC64_GOT_DTPREL16_HI", /* name */
1864 FALSE, /* partial_inplace */
1865 0, /* src_mask */
1866 0xffff, /* dst_mask */
1867 FALSE), /* pcrel_offset */
1868
1869 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1870 HOWTO (R_PPC64_GOT_DTPREL16_HA,
1871 16, /* rightshift */
1872 1, /* size (0 = byte, 1 = short, 2 = long) */
1873 16, /* bitsize */
1874 FALSE, /* pc_relative */
1875 0, /* bitpos */
1876 complain_overflow_signed, /* complain_on_overflow */
1877 ppc64_elf_unhandled_reloc, /* special_function */
1878 "R_PPC64_GOT_DTPREL16_HA", /* name */
1879 FALSE, /* partial_inplace */
1880 0, /* src_mask */
1881 0xffff, /* dst_mask */
1882 FALSE), /* pcrel_offset */
1883
1884 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1885 offset to the entry relative to the TOC base (r2). */
1886 HOWTO (R_PPC64_GOT_TPREL16_DS,
1887 0, /* rightshift */
1888 1, /* size (0 = byte, 1 = short, 2 = long) */
1889 16, /* bitsize */
1890 FALSE, /* pc_relative */
1891 0, /* bitpos */
1892 complain_overflow_signed, /* complain_on_overflow */
1893 ppc64_elf_unhandled_reloc, /* special_function */
1894 "R_PPC64_GOT_TPREL16_DS", /* name */
1895 FALSE, /* partial_inplace */
1896 0, /* src_mask */
1897 0xfffc, /* dst_mask */
1898 FALSE), /* pcrel_offset */
1899
1900 /* Like GOT_TPREL16_DS, but no overflow. */
1901 HOWTO (R_PPC64_GOT_TPREL16_LO_DS,
1902 0, /* rightshift */
1903 1, /* size (0 = byte, 1 = short, 2 = long) */
1904 16, /* bitsize */
1905 FALSE, /* pc_relative */
1906 0, /* bitpos */
1907 complain_overflow_dont, /* complain_on_overflow */
1908 ppc64_elf_unhandled_reloc, /* special_function */
1909 "R_PPC64_GOT_TPREL16_LO_DS", /* name */
1910 FALSE, /* partial_inplace */
1911 0, /* src_mask */
1912 0xfffc, /* dst_mask */
1913 FALSE), /* pcrel_offset */
1914
1915 /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */
1916 HOWTO (R_PPC64_GOT_TPREL16_HI,
1917 16, /* rightshift */
1918 1, /* size (0 = byte, 1 = short, 2 = long) */
1919 16, /* bitsize */
1920 FALSE, /* pc_relative */
1921 0, /* bitpos */
1922 complain_overflow_signed, /* complain_on_overflow */
1923 ppc64_elf_unhandled_reloc, /* special_function */
1924 "R_PPC64_GOT_TPREL16_HI", /* name */
1925 FALSE, /* partial_inplace */
1926 0, /* src_mask */
1927 0xffff, /* dst_mask */
1928 FALSE), /* pcrel_offset */
1929
1930 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1931 HOWTO (R_PPC64_GOT_TPREL16_HA,
1932 16, /* rightshift */
1933 1, /* size (0 = byte, 1 = short, 2 = long) */
1934 16, /* bitsize */
1935 FALSE, /* pc_relative */
1936 0, /* bitpos */
1937 complain_overflow_signed, /* complain_on_overflow */
1938 ppc64_elf_unhandled_reloc, /* special_function */
1939 "R_PPC64_GOT_TPREL16_HA", /* name */
1940 FALSE, /* partial_inplace */
1941 0, /* src_mask */
1942 0xffff, /* dst_mask */
1943 FALSE), /* pcrel_offset */
1944
1945 HOWTO (R_PPC64_JMP_IREL, /* type */
1946 0, /* rightshift */
1947 0, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1948 0, /* bitsize */
1949 FALSE, /* pc_relative */
1950 0, /* bitpos */
1951 complain_overflow_dont, /* complain_on_overflow */
1952 ppc64_elf_unhandled_reloc, /* special_function */
1953 "R_PPC64_JMP_IREL", /* name */
1954 FALSE, /* partial_inplace */
1955 0, /* src_mask */
1956 0, /* dst_mask */
1957 FALSE), /* pcrel_offset */
1958
1959 HOWTO (R_PPC64_IRELATIVE, /* type */
1960 0, /* rightshift */
1961 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1962 64, /* bitsize */
1963 FALSE, /* pc_relative */
1964 0, /* bitpos */
1965 complain_overflow_dont, /* complain_on_overflow */
1966 bfd_elf_generic_reloc, /* special_function */
1967 "R_PPC64_IRELATIVE", /* name */
1968 FALSE, /* partial_inplace */
1969 0, /* src_mask */
1970 ONES (64), /* dst_mask */
1971 FALSE), /* pcrel_offset */
1972
1973 /* A 16 bit relative relocation. */
1974 HOWTO (R_PPC64_REL16, /* type */
1975 0, /* rightshift */
1976 1, /* size (0 = byte, 1 = short, 2 = long) */
1977 16, /* bitsize */
1978 TRUE, /* pc_relative */
1979 0, /* bitpos */
1980 complain_overflow_signed, /* complain_on_overflow */
1981 bfd_elf_generic_reloc, /* special_function */
1982 "R_PPC64_REL16", /* name */
1983 FALSE, /* partial_inplace */
1984 0, /* src_mask */
1985 0xffff, /* dst_mask */
1986 TRUE), /* pcrel_offset */
1987
1988 /* A 16 bit relative relocation without overflow. */
1989 HOWTO (R_PPC64_REL16_LO, /* type */
1990 0, /* rightshift */
1991 1, /* size (0 = byte, 1 = short, 2 = long) */
1992 16, /* bitsize */
1993 TRUE, /* pc_relative */
1994 0, /* bitpos */
1995 complain_overflow_dont,/* complain_on_overflow */
1996 bfd_elf_generic_reloc, /* special_function */
1997 "R_PPC64_REL16_LO", /* name */
1998 FALSE, /* partial_inplace */
1999 0, /* src_mask */
2000 0xffff, /* dst_mask */
2001 TRUE), /* pcrel_offset */
2002
2003 /* The high order 16 bits of a relative address. */
2004 HOWTO (R_PPC64_REL16_HI, /* type */
2005 16, /* rightshift */
2006 1, /* size (0 = byte, 1 = short, 2 = long) */
2007 16, /* bitsize */
2008 TRUE, /* pc_relative */
2009 0, /* bitpos */
2010 complain_overflow_signed, /* complain_on_overflow */
2011 bfd_elf_generic_reloc, /* special_function */
2012 "R_PPC64_REL16_HI", /* name */
2013 FALSE, /* partial_inplace */
2014 0, /* src_mask */
2015 0xffff, /* dst_mask */
2016 TRUE), /* pcrel_offset */
2017
2018 /* The high order 16 bits of a relative address, plus 1 if the contents of
2019 the low 16 bits, treated as a signed number, is negative. */
2020 HOWTO (R_PPC64_REL16_HA, /* type */
2021 16, /* rightshift */
2022 1, /* size (0 = byte, 1 = short, 2 = long) */
2023 16, /* bitsize */
2024 TRUE, /* pc_relative */
2025 0, /* bitpos */
2026 complain_overflow_signed, /* complain_on_overflow */
2027 ppc64_elf_ha_reloc, /* special_function */
2028 "R_PPC64_REL16_HA", /* name */
2029 FALSE, /* partial_inplace */
2030 0, /* src_mask */
2031 0xffff, /* dst_mask */
2032 TRUE), /* pcrel_offset */
2033
2034 /* Like R_PPC64_REL16_HA but for split field in addpcis. */
2035 HOWTO (R_PPC64_REL16DX_HA, /* type */
2036 16, /* rightshift */
2037 2, /* size (0 = byte, 1 = short, 2 = long) */
2038 16, /* bitsize */
2039 TRUE, /* pc_relative */
2040 0, /* bitpos */
2041 complain_overflow_signed, /* complain_on_overflow */
2042 ppc64_elf_ha_reloc, /* special_function */
2043 "R_PPC64_REL16DX_HA", /* name */
2044 FALSE, /* partial_inplace */
2045 0, /* src_mask */
2046 0x1fffc1, /* dst_mask */
2047 TRUE), /* pcrel_offset */
2048
2049 /* A split-field reloc for addpcis, non-relative (gas internal use only). */
2050 HOWTO (R_PPC64_16DX_HA, /* type */
2051 16, /* rightshift */
2052 2, /* size (0 = byte, 1 = short, 2 = long) */
2053 16, /* bitsize */
2054 FALSE, /* pc_relative */
2055 0, /* bitpos */
2056 complain_overflow_signed, /* complain_on_overflow */
2057 ppc64_elf_ha_reloc, /* special_function */
2058 "R_PPC64_16DX_HA", /* name */
2059 FALSE, /* partial_inplace */
2060 0, /* src_mask */
2061 0x1fffc1, /* dst_mask */
2062 FALSE), /* pcrel_offset */
2063
2064 /* Like R_PPC64_ADDR16_HI, but no overflow. */
2065 HOWTO (R_PPC64_ADDR16_HIGH, /* type */
2066 16, /* rightshift */
2067 1, /* size (0 = byte, 1 = short, 2 = long) */
2068 16, /* bitsize */
2069 FALSE, /* pc_relative */
2070 0, /* bitpos */
2071 complain_overflow_dont, /* complain_on_overflow */
2072 bfd_elf_generic_reloc, /* special_function */
2073 "R_PPC64_ADDR16_HIGH", /* name */
2074 FALSE, /* partial_inplace */
2075 0, /* src_mask */
2076 0xffff, /* dst_mask */
2077 FALSE), /* pcrel_offset */
2078
2079 /* Like R_PPC64_ADDR16_HA, but no overflow. */
2080 HOWTO (R_PPC64_ADDR16_HIGHA, /* type */
2081 16, /* rightshift */
2082 1, /* size (0 = byte, 1 = short, 2 = long) */
2083 16, /* bitsize */
2084 FALSE, /* pc_relative */
2085 0, /* bitpos */
2086 complain_overflow_dont, /* complain_on_overflow */
2087 ppc64_elf_ha_reloc, /* special_function */
2088 "R_PPC64_ADDR16_HIGHA", /* name */
2089 FALSE, /* partial_inplace */
2090 0, /* src_mask */
2091 0xffff, /* dst_mask */
2092 FALSE), /* pcrel_offset */
2093
2094 /* Like R_PPC64_DTPREL16_HI, but no overflow. */
2095 HOWTO (R_PPC64_DTPREL16_HIGH,
2096 16, /* rightshift */
2097 1, /* size (0 = byte, 1 = short, 2 = long) */
2098 16, /* bitsize */
2099 FALSE, /* pc_relative */
2100 0, /* bitpos */
2101 complain_overflow_dont, /* complain_on_overflow */
2102 ppc64_elf_unhandled_reloc, /* special_function */
2103 "R_PPC64_DTPREL16_HIGH", /* name */
2104 FALSE, /* partial_inplace */
2105 0, /* src_mask */
2106 0xffff, /* dst_mask */
2107 FALSE), /* pcrel_offset */
2108
2109 /* Like R_PPC64_DTPREL16_HA, but no overflow. */
2110 HOWTO (R_PPC64_DTPREL16_HIGHA,
2111 16, /* rightshift */
2112 1, /* size (0 = byte, 1 = short, 2 = long) */
2113 16, /* bitsize */
2114 FALSE, /* pc_relative */
2115 0, /* bitpos */
2116 complain_overflow_dont, /* complain_on_overflow */
2117 ppc64_elf_unhandled_reloc, /* special_function */
2118 "R_PPC64_DTPREL16_HIGHA", /* name */
2119 FALSE, /* partial_inplace */
2120 0, /* src_mask */
2121 0xffff, /* dst_mask */
2122 FALSE), /* pcrel_offset */
2123
2124 /* Like R_PPC64_TPREL16_HI, but no overflow. */
2125 HOWTO (R_PPC64_TPREL16_HIGH,
2126 16, /* rightshift */
2127 1, /* size (0 = byte, 1 = short, 2 = long) */
2128 16, /* bitsize */
2129 FALSE, /* pc_relative */
2130 0, /* bitpos */
2131 complain_overflow_dont, /* complain_on_overflow */
2132 ppc64_elf_unhandled_reloc, /* special_function */
2133 "R_PPC64_TPREL16_HIGH", /* name */
2134 FALSE, /* partial_inplace */
2135 0, /* src_mask */
2136 0xffff, /* dst_mask */
2137 FALSE), /* pcrel_offset */
2138
2139 /* Like R_PPC64_TPREL16_HA, but no overflow. */
2140 HOWTO (R_PPC64_TPREL16_HIGHA,
2141 16, /* rightshift */
2142 1, /* size (0 = byte, 1 = short, 2 = long) */
2143 16, /* bitsize */
2144 FALSE, /* pc_relative */
2145 0, /* bitpos */
2146 complain_overflow_dont, /* complain_on_overflow */
2147 ppc64_elf_unhandled_reloc, /* special_function */
2148 "R_PPC64_TPREL16_HIGHA", /* name */
2149 FALSE, /* partial_inplace */
2150 0, /* src_mask */
2151 0xffff, /* dst_mask */
2152 FALSE), /* pcrel_offset */
2153
2154 /* Marker reloc on ELFv2 large-model function entry. */
2155 HOWTO (R_PPC64_ENTRY,
2156 0, /* rightshift */
2157 2, /* size (0 = byte, 1 = short, 2 = long) */
2158 32, /* bitsize */
2159 FALSE, /* pc_relative */
2160 0, /* bitpos */
2161 complain_overflow_dont, /* complain_on_overflow */
2162 bfd_elf_generic_reloc, /* special_function */
2163 "R_PPC64_ENTRY", /* name */
2164 FALSE, /* partial_inplace */
2165 0, /* src_mask */
2166 0, /* dst_mask */
2167 FALSE), /* pcrel_offset */
2168
2169 /* Like ADDR64, but use local entry point of function. */
2170 HOWTO (R_PPC64_ADDR64_LOCAL, /* type */
2171 0, /* rightshift */
2172 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
2173 64, /* bitsize */
2174 FALSE, /* pc_relative */
2175 0, /* bitpos */
2176 complain_overflow_dont, /* complain_on_overflow */
2177 bfd_elf_generic_reloc, /* special_function */
2178 "R_PPC64_ADDR64_LOCAL", /* name */
2179 FALSE, /* partial_inplace */
2180 0, /* src_mask */
2181 ONES (64), /* dst_mask */
2182 FALSE), /* pcrel_offset */
2183
2184 /* GNU extension to record C++ vtable hierarchy. */
2185 HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
2186 0, /* rightshift */
2187 0, /* size (0 = byte, 1 = short, 2 = long) */
2188 0, /* bitsize */
2189 FALSE, /* pc_relative */
2190 0, /* bitpos */
2191 complain_overflow_dont, /* complain_on_overflow */
2192 NULL, /* special_function */
2193 "R_PPC64_GNU_VTINHERIT", /* name */
2194 FALSE, /* partial_inplace */
2195 0, /* src_mask */
2196 0, /* dst_mask */
2197 FALSE), /* pcrel_offset */
2198
2199 /* GNU extension to record C++ vtable member usage. */
2200 HOWTO (R_PPC64_GNU_VTENTRY, /* type */
2201 0, /* rightshift */
2202 0, /* size (0 = byte, 1 = short, 2 = long) */
2203 0, /* bitsize */
2204 FALSE, /* pc_relative */
2205 0, /* bitpos */
2206 complain_overflow_dont, /* complain_on_overflow */
2207 NULL, /* special_function */
2208 "R_PPC64_GNU_VTENTRY", /* name */
2209 FALSE, /* partial_inplace */
2210 0, /* src_mask */
2211 0, /* dst_mask */
2212 FALSE), /* pcrel_offset */
2213 };
2214
2215 \f
2216 /* Initialize the ppc64_elf_howto_table, so that linear accesses can
2217 be done. */
2218
2219 static void
2220 ppc_howto_init (void)
2221 {
2222 unsigned int i, type;
2223
2224 for (i = 0; i < ARRAY_SIZE (ppc64_elf_howto_raw); i++)
2225 {
2226 type = ppc64_elf_howto_raw[i].type;
2227 BFD_ASSERT (type < ARRAY_SIZE (ppc64_elf_howto_table));
2228 ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
2229 }
2230 }
2231
2232 static reloc_howto_type *
2233 ppc64_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2234 bfd_reloc_code_real_type code)
2235 {
2236 enum elf_ppc64_reloc_type r = R_PPC64_NONE;
2237
2238 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2239 /* Initialize howto table if needed. */
2240 ppc_howto_init ();
2241
2242 switch (code)
2243 {
2244 default:
2245 return NULL;
2246
2247 case BFD_RELOC_NONE: r = R_PPC64_NONE;
2248 break;
2249 case BFD_RELOC_32: r = R_PPC64_ADDR32;
2250 break;
2251 case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24;
2252 break;
2253 case BFD_RELOC_16: r = R_PPC64_ADDR16;
2254 break;
2255 case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO;
2256 break;
2257 case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI;
2258 break;
2259 case BFD_RELOC_PPC64_ADDR16_HIGH: r = R_PPC64_ADDR16_HIGH;
2260 break;
2261 case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA;
2262 break;
2263 case BFD_RELOC_PPC64_ADDR16_HIGHA: r = R_PPC64_ADDR16_HIGHA;
2264 break;
2265 case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14;
2266 break;
2267 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN;
2268 break;
2269 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN;
2270 break;
2271 case BFD_RELOC_PPC_B26: r = R_PPC64_REL24;
2272 break;
2273 case BFD_RELOC_PPC_B16: r = R_PPC64_REL14;
2274 break;
2275 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN;
2276 break;
2277 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN;
2278 break;
2279 case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16;
2280 break;
2281 case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO;
2282 break;
2283 case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI;
2284 break;
2285 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA;
2286 break;
2287 case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY;
2288 break;
2289 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT;
2290 break;
2291 case BFD_RELOC_32_PCREL: r = R_PPC64_REL32;
2292 break;
2293 case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32;
2294 break;
2295 case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32;
2296 break;
2297 case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO;
2298 break;
2299 case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI;
2300 break;
2301 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA;
2302 break;
2303 case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF;
2304 break;
2305 case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO;
2306 break;
2307 case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI;
2308 break;
2309 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA;
2310 break;
2311 case BFD_RELOC_CTOR: r = R_PPC64_ADDR64;
2312 break;
2313 case BFD_RELOC_64: r = R_PPC64_ADDR64;
2314 break;
2315 case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER;
2316 break;
2317 case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA;
2318 break;
2319 case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST;
2320 break;
2321 case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA;
2322 break;
2323 case BFD_RELOC_64_PCREL: r = R_PPC64_REL64;
2324 break;
2325 case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64;
2326 break;
2327 case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64;
2328 break;
2329 case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16;
2330 break;
2331 case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO;
2332 break;
2333 case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI;
2334 break;
2335 case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA;
2336 break;
2337 case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC;
2338 break;
2339 case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16;
2340 break;
2341 case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO;
2342 break;
2343 case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI;
2344 break;
2345 case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA;
2346 break;
2347 case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS;
2348 break;
2349 case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS;
2350 break;
2351 case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS;
2352 break;
2353 case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS;
2354 break;
2355 case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS;
2356 break;
2357 case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS;
2358 break;
2359 case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS;
2360 break;
2361 case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS;
2362 break;
2363 case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS;
2364 break;
2365 case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS;
2366 break;
2367 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS;
2368 break;
2369 case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS;
2370 break;
2371 case BFD_RELOC_PPC_TLSGD: r = R_PPC64_TLSGD;
2372 break;
2373 case BFD_RELOC_PPC_TLSLD: r = R_PPC64_TLSLD;
2374 break;
2375 case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64;
2376 break;
2377 case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16;
2378 break;
2379 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO;
2380 break;
2381 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI;
2382 break;
2383 case BFD_RELOC_PPC64_TPREL16_HIGH: r = R_PPC64_TPREL16_HIGH;
2384 break;
2385 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA;
2386 break;
2387 case BFD_RELOC_PPC64_TPREL16_HIGHA: r = R_PPC64_TPREL16_HIGHA;
2388 break;
2389 case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64;
2390 break;
2391 case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16;
2392 break;
2393 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO;
2394 break;
2395 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI;
2396 break;
2397 case BFD_RELOC_PPC64_DTPREL16_HIGH: r = R_PPC64_DTPREL16_HIGH;
2398 break;
2399 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA;
2400 break;
2401 case BFD_RELOC_PPC64_DTPREL16_HIGHA: r = R_PPC64_DTPREL16_HIGHA;
2402 break;
2403 case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64;
2404 break;
2405 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16;
2406 break;
2407 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO;
2408 break;
2409 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI;
2410 break;
2411 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA;
2412 break;
2413 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16;
2414 break;
2415 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO;
2416 break;
2417 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI;
2418 break;
2419 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA;
2420 break;
2421 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS;
2422 break;
2423 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS;
2424 break;
2425 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI;
2426 break;
2427 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA;
2428 break;
2429 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS;
2430 break;
2431 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS;
2432 break;
2433 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI;
2434 break;
2435 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA;
2436 break;
2437 case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS;
2438 break;
2439 case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS;
2440 break;
2441 case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER;
2442 break;
2443 case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA;
2444 break;
2445 case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST;
2446 break;
2447 case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA;
2448 break;
2449 case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS;
2450 break;
2451 case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS;
2452 break;
2453 case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER;
2454 break;
2455 case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA;
2456 break;
2457 case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST;
2458 break;
2459 case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA;
2460 break;
2461 case BFD_RELOC_16_PCREL: r = R_PPC64_REL16;
2462 break;
2463 case BFD_RELOC_LO16_PCREL: r = R_PPC64_REL16_LO;
2464 break;
2465 case BFD_RELOC_HI16_PCREL: r = R_PPC64_REL16_HI;
2466 break;
2467 case BFD_RELOC_HI16_S_PCREL: r = R_PPC64_REL16_HA;
2468 break;
2469 case BFD_RELOC_PPC_16DX_HA: r = R_PPC64_16DX_HA;
2470 break;
2471 case BFD_RELOC_PPC_REL16DX_HA: r = R_PPC64_REL16DX_HA;
2472 break;
2473 case BFD_RELOC_PPC64_ENTRY: r = R_PPC64_ENTRY;
2474 break;
2475 case BFD_RELOC_PPC64_ADDR64_LOCAL: r = R_PPC64_ADDR64_LOCAL;
2476 break;
2477 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT;
2478 break;
2479 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY;
2480 break;
2481 }
2482
2483 return ppc64_elf_howto_table[r];
2484 };
2485
2486 static reloc_howto_type *
2487 ppc64_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2488 const char *r_name)
2489 {
2490 unsigned int i;
2491
2492 for (i = 0; i < ARRAY_SIZE (ppc64_elf_howto_raw); i++)
2493 if (ppc64_elf_howto_raw[i].name != NULL
2494 && strcasecmp (ppc64_elf_howto_raw[i].name, r_name) == 0)
2495 return &ppc64_elf_howto_raw[i];
2496
2497 return NULL;
2498 }
2499
2500 /* Set the howto pointer for a PowerPC ELF reloc. */
2501
2502 static void
2503 ppc64_elf_info_to_howto (bfd *abfd, arelent *cache_ptr,
2504 Elf_Internal_Rela *dst)
2505 {
2506 unsigned int type;
2507
2508 /* Initialize howto table if needed. */
2509 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2510 ppc_howto_init ();
2511
2512 type = ELF64_R_TYPE (dst->r_info);
2513 if (type >= ARRAY_SIZE (ppc64_elf_howto_table))
2514 {
2515 /* xgettext:c-format */
2516 _bfd_error_handler (_("%B: invalid relocation type %d"),
2517 abfd, (int) type);
2518 type = R_PPC64_NONE;
2519 }
2520 cache_ptr->howto = ppc64_elf_howto_table[type];
2521 }
2522
2523 /* Handle the R_PPC64_ADDR16_HA and similar relocs. */
2524
2525 static bfd_reloc_status_type
2526 ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2527 void *data, asection *input_section,
2528 bfd *output_bfd, char **error_message)
2529 {
2530 enum elf_ppc64_reloc_type r_type;
2531 long insn;
2532 bfd_size_type octets;
2533 bfd_vma value;
2534
2535 /* If this is a relocatable link (output_bfd test tells us), just
2536 call the generic function. Any adjustment will be done at final
2537 link time. */
2538 if (output_bfd != NULL)
2539 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2540 input_section, output_bfd, error_message);
2541
2542 /* Adjust the addend for sign extension of the low 16 bits.
2543 We won't actually be using the low 16 bits, so trashing them
2544 doesn't matter. */
2545 reloc_entry->addend += 0x8000;
2546 r_type = reloc_entry->howto->type;
2547 if (r_type != R_PPC64_REL16DX_HA)
2548 return bfd_reloc_continue;
2549
2550 value = 0;
2551 if (!bfd_is_com_section (symbol->section))
2552 value = symbol->value;
2553 value += (reloc_entry->addend
2554 + symbol->section->output_offset
2555 + symbol->section->output_section->vma);
2556 value -= (reloc_entry->address
2557 + input_section->output_offset
2558 + input_section->output_section->vma);
2559 value = (bfd_signed_vma) value >> 16;
2560
2561 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2562 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2563 insn &= ~0x1fffc1;
2564 insn |= (value & 0xffc1) | ((value & 0x3e) << 15);
2565 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2566 if (value + 0x8000 > 0xffff)
2567 return bfd_reloc_overflow;
2568 return bfd_reloc_ok;
2569 }
2570
2571 static bfd_reloc_status_type
2572 ppc64_elf_branch_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2573 void *data, asection *input_section,
2574 bfd *output_bfd, char **error_message)
2575 {
2576 if (output_bfd != NULL)
2577 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2578 input_section, output_bfd, error_message);
2579
2580 if (strcmp (symbol->section->name, ".opd") == 0
2581 && (symbol->section->owner->flags & DYNAMIC) == 0)
2582 {
2583 bfd_vma dest = opd_entry_value (symbol->section,
2584 symbol->value + reloc_entry->addend,
2585 NULL, NULL, FALSE);
2586 if (dest != (bfd_vma) -1)
2587 reloc_entry->addend = dest - (symbol->value
2588 + symbol->section->output_section->vma
2589 + symbol->section->output_offset);
2590 }
2591 else
2592 {
2593 elf_symbol_type *elfsym = (elf_symbol_type *) symbol;
2594
2595 if (symbol->section->owner != abfd
2596 && symbol->section->owner != NULL
2597 && abiversion (symbol->section->owner) >= 2)
2598 {
2599 unsigned int i;
2600
2601 for (i = 0; i < symbol->section->owner->symcount; ++i)
2602 {
2603 asymbol *symdef = symbol->section->owner->outsymbols[i];
2604
2605 if (strcmp (symdef->name, symbol->name) == 0)
2606 {
2607 elfsym = (elf_symbol_type *) symdef;
2608 break;
2609 }
2610 }
2611 }
2612 reloc_entry->addend
2613 += PPC64_LOCAL_ENTRY_OFFSET (elfsym->internal_elf_sym.st_other);
2614 }
2615 return bfd_reloc_continue;
2616 }
2617
2618 static bfd_reloc_status_type
2619 ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2620 void *data, asection *input_section,
2621 bfd *output_bfd, char **error_message)
2622 {
2623 long insn;
2624 enum elf_ppc64_reloc_type r_type;
2625 bfd_size_type octets;
2626 /* Assume 'at' branch hints. */
2627 bfd_boolean is_isa_v2 = TRUE;
2628
2629 /* If this is a relocatable link (output_bfd test tells us), just
2630 call the generic function. Any adjustment will be done at final
2631 link time. */
2632 if (output_bfd != NULL)
2633 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2634 input_section, output_bfd, error_message);
2635
2636 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2637 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2638 insn &= ~(0x01 << 21);
2639 r_type = reloc_entry->howto->type;
2640 if (r_type == R_PPC64_ADDR14_BRTAKEN
2641 || r_type == R_PPC64_REL14_BRTAKEN)
2642 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
2643
2644 if (is_isa_v2)
2645 {
2646 /* Set 'a' bit. This is 0b00010 in BO field for branch
2647 on CR(BI) insns (BO == 001at or 011at), and 0b01000
2648 for branch on CTR insns (BO == 1a00t or 1a01t). */
2649 if ((insn & (0x14 << 21)) == (0x04 << 21))
2650 insn |= 0x02 << 21;
2651 else if ((insn & (0x14 << 21)) == (0x10 << 21))
2652 insn |= 0x08 << 21;
2653 else
2654 goto out;
2655 }
2656 else
2657 {
2658 bfd_vma target = 0;
2659 bfd_vma from;
2660
2661 if (!bfd_is_com_section (symbol->section))
2662 target = symbol->value;
2663 target += symbol->section->output_section->vma;
2664 target += symbol->section->output_offset;
2665 target += reloc_entry->addend;
2666
2667 from = (reloc_entry->address
2668 + input_section->output_offset
2669 + input_section->output_section->vma);
2670
2671 /* Invert 'y' bit if not the default. */
2672 if ((bfd_signed_vma) (target - from) < 0)
2673 insn ^= 0x01 << 21;
2674 }
2675 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2676 out:
2677 return ppc64_elf_branch_reloc (abfd, reloc_entry, symbol, data,
2678 input_section, output_bfd, error_message);
2679 }
2680
2681 static bfd_reloc_status_type
2682 ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2683 void *data, asection *input_section,
2684 bfd *output_bfd, char **error_message)
2685 {
2686 /* If this is a relocatable link (output_bfd test tells us), just
2687 call the generic function. Any adjustment will be done at final
2688 link time. */
2689 if (output_bfd != NULL)
2690 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2691 input_section, output_bfd, error_message);
2692
2693 /* Subtract the symbol section base address. */
2694 reloc_entry->addend -= symbol->section->output_section->vma;
2695 return bfd_reloc_continue;
2696 }
2697
2698 static bfd_reloc_status_type
2699 ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2700 void *data, asection *input_section,
2701 bfd *output_bfd, char **error_message)
2702 {
2703 /* If this is a relocatable link (output_bfd test tells us), just
2704 call the generic function. Any adjustment will be done at final
2705 link time. */
2706 if (output_bfd != NULL)
2707 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2708 input_section, output_bfd, error_message);
2709
2710 /* Subtract the symbol section base address. */
2711 reloc_entry->addend -= symbol->section->output_section->vma;
2712
2713 /* Adjust the addend for sign extension of the low 16 bits. */
2714 reloc_entry->addend += 0x8000;
2715 return bfd_reloc_continue;
2716 }
2717
2718 static bfd_reloc_status_type
2719 ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2720 void *data, asection *input_section,
2721 bfd *output_bfd, char **error_message)
2722 {
2723 bfd_vma TOCstart;
2724
2725 /* If this is a relocatable link (output_bfd test tells us), just
2726 call the generic function. Any adjustment will be done at final
2727 link time. */
2728 if (output_bfd != NULL)
2729 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2730 input_section, output_bfd, error_message);
2731
2732 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2733 if (TOCstart == 0)
2734 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2735
2736 /* Subtract the TOC base address. */
2737 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2738 return bfd_reloc_continue;
2739 }
2740
2741 static bfd_reloc_status_type
2742 ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2743 void *data, asection *input_section,
2744 bfd *output_bfd, char **error_message)
2745 {
2746 bfd_vma TOCstart;
2747
2748 /* If this is a relocatable link (output_bfd test tells us), just
2749 call the generic function. Any adjustment will be done at final
2750 link time. */
2751 if (output_bfd != NULL)
2752 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2753 input_section, output_bfd, error_message);
2754
2755 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2756 if (TOCstart == 0)
2757 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2758
2759 /* Subtract the TOC base address. */
2760 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2761
2762 /* Adjust the addend for sign extension of the low 16 bits. */
2763 reloc_entry->addend += 0x8000;
2764 return bfd_reloc_continue;
2765 }
2766
2767 static bfd_reloc_status_type
2768 ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2769 void *data, asection *input_section,
2770 bfd *output_bfd, char **error_message)
2771 {
2772 bfd_vma TOCstart;
2773 bfd_size_type octets;
2774
2775 /* If this is a relocatable link (output_bfd test tells us), just
2776 call the generic function. Any adjustment will be done at final
2777 link time. */
2778 if (output_bfd != NULL)
2779 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2780 input_section, output_bfd, error_message);
2781
2782 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2783 if (TOCstart == 0)
2784 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2785
2786 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2787 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
2788 return bfd_reloc_ok;
2789 }
2790
2791 static bfd_reloc_status_type
2792 ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2793 void *data, asection *input_section,
2794 bfd *output_bfd, char **error_message)
2795 {
2796 /* If this is a relocatable link (output_bfd test tells us), just
2797 call the generic function. Any adjustment will be done at final
2798 link time. */
2799 if (output_bfd != NULL)
2800 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2801 input_section, output_bfd, error_message);
2802
2803 if (error_message != NULL)
2804 {
2805 static char buf[60];
2806 sprintf (buf, "generic linker can't handle %s",
2807 reloc_entry->howto->name);
2808 *error_message = buf;
2809 }
2810 return bfd_reloc_dangerous;
2811 }
2812
2813 /* Track GOT entries needed for a given symbol. We might need more
2814 than one got entry per symbol. */
2815 struct got_entry
2816 {
2817 struct got_entry *next;
2818
2819 /* The symbol addend that we'll be placing in the GOT. */
2820 bfd_vma addend;
2821
2822 /* Unlike other ELF targets, we use separate GOT entries for the same
2823 symbol referenced from different input files. This is to support
2824 automatic multiple TOC/GOT sections, where the TOC base can vary
2825 from one input file to another. After partitioning into TOC groups
2826 we merge entries within the group.
2827
2828 Point to the BFD owning this GOT entry. */
2829 bfd *owner;
2830
2831 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
2832 TLS_TPREL or TLS_DTPREL for tls entries. */
2833 unsigned char tls_type;
2834
2835 /* Non-zero if got.ent points to real entry. */
2836 unsigned char is_indirect;
2837
2838 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
2839 union
2840 {
2841 bfd_signed_vma refcount;
2842 bfd_vma offset;
2843 struct got_entry *ent;
2844 } got;
2845 };
2846
2847 /* The same for PLT. */
2848 struct plt_entry
2849 {
2850 struct plt_entry *next;
2851
2852 bfd_vma addend;
2853
2854 union
2855 {
2856 bfd_signed_vma refcount;
2857 bfd_vma offset;
2858 } plt;
2859 };
2860
2861 struct ppc64_elf_obj_tdata
2862 {
2863 struct elf_obj_tdata elf;
2864
2865 /* Shortcuts to dynamic linker sections. */
2866 asection *got;
2867 asection *relgot;
2868
2869 /* Used during garbage collection. We attach global symbols defined
2870 on removed .opd entries to this section so that the sym is removed. */
2871 asection *deleted_section;
2872
2873 /* TLS local dynamic got entry handling. Support for multiple GOT
2874 sections means we potentially need one of these for each input bfd. */
2875 struct got_entry tlsld_got;
2876
2877 union {
2878 /* A copy of relocs before they are modified for --emit-relocs. */
2879 Elf_Internal_Rela *relocs;
2880
2881 /* Section contents. */
2882 bfd_byte *contents;
2883 } opd;
2884
2885 /* Nonzero if this bfd has small toc/got relocs, ie. that expect
2886 the reloc to be in the range -32768 to 32767. */
2887 unsigned int has_small_toc_reloc : 1;
2888
2889 /* Set if toc/got ha relocs detected not using r2, or lo reloc
2890 instruction not one we handle. */
2891 unsigned int unexpected_toc_insn : 1;
2892 };
2893
2894 #define ppc64_elf_tdata(bfd) \
2895 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
2896
2897 #define ppc64_tlsld_got(bfd) \
2898 (&ppc64_elf_tdata (bfd)->tlsld_got)
2899
2900 #define is_ppc64_elf(bfd) \
2901 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2902 && elf_object_id (bfd) == PPC64_ELF_DATA)
2903
2904 /* Override the generic function because we store some extras. */
2905
2906 static bfd_boolean
2907 ppc64_elf_mkobject (bfd *abfd)
2908 {
2909 return bfd_elf_allocate_object (abfd, sizeof (struct ppc64_elf_obj_tdata),
2910 PPC64_ELF_DATA);
2911 }
2912
2913 /* Fix bad default arch selected for a 64 bit input bfd when the
2914 default is 32 bit. Also select arch based on apuinfo. */
2915
2916 static bfd_boolean
2917 ppc64_elf_object_p (bfd *abfd)
2918 {
2919 if (!abfd->arch_info->the_default)
2920 return TRUE;
2921
2922 if (abfd->arch_info->bits_per_word == 32)
2923 {
2924 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2925
2926 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2927 {
2928 /* Relies on arch after 32 bit default being 64 bit default. */
2929 abfd->arch_info = abfd->arch_info->next;
2930 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2931 }
2932 }
2933 return _bfd_elf_ppc_set_arch (abfd);
2934 }
2935
2936 /* Support for core dump NOTE sections. */
2937
2938 static bfd_boolean
2939 ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2940 {
2941 size_t offset, size;
2942
2943 if (note->descsz != 504)
2944 return FALSE;
2945
2946 /* pr_cursig */
2947 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
2948
2949 /* pr_pid */
2950 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 32);
2951
2952 /* pr_reg */
2953 offset = 112;
2954 size = 384;
2955
2956 /* Make a ".reg/999" section. */
2957 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2958 size, note->descpos + offset);
2959 }
2960
2961 static bfd_boolean
2962 ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2963 {
2964 if (note->descsz != 136)
2965 return FALSE;
2966
2967 elf_tdata (abfd)->core->pid
2968 = bfd_get_32 (abfd, note->descdata + 24);
2969 elf_tdata (abfd)->core->program
2970 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
2971 elf_tdata (abfd)->core->command
2972 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
2973
2974 return TRUE;
2975 }
2976
2977 static char *
2978 ppc64_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type,
2979 ...)
2980 {
2981 switch (note_type)
2982 {
2983 default:
2984 return NULL;
2985
2986 case NT_PRPSINFO:
2987 {
2988 char data[136];
2989 va_list ap;
2990
2991 va_start (ap, note_type);
2992 memset (data, 0, sizeof (data));
2993 strncpy (data + 40, va_arg (ap, const char *), 16);
2994 strncpy (data + 56, va_arg (ap, const char *), 80);
2995 va_end (ap);
2996 return elfcore_write_note (abfd, buf, bufsiz,
2997 "CORE", note_type, data, sizeof (data));
2998 }
2999
3000 case NT_PRSTATUS:
3001 {
3002 char data[504];
3003 va_list ap;
3004 long pid;
3005 int cursig;
3006 const void *greg;
3007
3008 va_start (ap, note_type);
3009 memset (data, 0, 112);
3010 pid = va_arg (ap, long);
3011 bfd_put_32 (abfd, pid, data + 32);
3012 cursig = va_arg (ap, int);
3013 bfd_put_16 (abfd, cursig, data + 12);
3014 greg = va_arg (ap, const void *);
3015 memcpy (data + 112, greg, 384);
3016 memset (data + 496, 0, 8);
3017 va_end (ap);
3018 return elfcore_write_note (abfd, buf, bufsiz,
3019 "CORE", note_type, data, sizeof (data));
3020 }
3021 }
3022 }
3023
3024 /* Add extra PPC sections. */
3025
3026 static const struct bfd_elf_special_section ppc64_elf_special_sections[]=
3027 {
3028 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, 0 },
3029 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
3030 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
3031 { STRING_COMMA_LEN (".toc"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
3032 { STRING_COMMA_LEN (".toc1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
3033 { STRING_COMMA_LEN (".tocbss"), 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
3034 { NULL, 0, 0, 0, 0 }
3035 };
3036
3037 enum _ppc64_sec_type {
3038 sec_normal = 0,
3039 sec_opd = 1,
3040 sec_toc = 2
3041 };
3042
3043 struct _ppc64_elf_section_data
3044 {
3045 struct bfd_elf_section_data elf;
3046
3047 union
3048 {
3049 /* An array with one entry for each opd function descriptor,
3050 and some spares since opd entries may be either 16 or 24 bytes. */
3051 #define OPD_NDX(OFF) ((OFF) >> 4)
3052 struct _opd_sec_data
3053 {
3054 /* Points to the function code section for local opd entries. */
3055 asection **func_sec;
3056
3057 /* After editing .opd, adjust references to opd local syms. */
3058 long *adjust;
3059 } opd;
3060
3061 /* An array for toc sections, indexed by offset/8. */
3062 struct _toc_sec_data
3063 {
3064 /* Specifies the relocation symbol index used at a given toc offset. */
3065 unsigned *symndx;
3066
3067 /* And the relocation addend. */
3068 bfd_vma *add;
3069 } toc;
3070 } u;
3071
3072 enum _ppc64_sec_type sec_type:2;
3073
3074 /* Flag set when small branches are detected. Used to
3075 select suitable defaults for the stub group size. */
3076 unsigned int has_14bit_branch:1;
3077 };
3078
3079 #define ppc64_elf_section_data(sec) \
3080 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
3081
3082 static bfd_boolean
3083 ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
3084 {
3085 if (!sec->used_by_bfd)
3086 {
3087 struct _ppc64_elf_section_data *sdata;
3088 bfd_size_type amt = sizeof (*sdata);
3089
3090 sdata = bfd_zalloc (abfd, amt);
3091 if (sdata == NULL)
3092 return FALSE;
3093 sec->used_by_bfd = sdata;
3094 }
3095
3096 return _bfd_elf_new_section_hook (abfd, sec);
3097 }
3098
3099 static struct _opd_sec_data *
3100 get_opd_info (asection * sec)
3101 {
3102 if (sec != NULL
3103 && ppc64_elf_section_data (sec) != NULL
3104 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
3105 return &ppc64_elf_section_data (sec)->u.opd;
3106 return NULL;
3107 }
3108 \f
3109 /* Parameters for the qsort hook. */
3110 static bfd_boolean synthetic_relocatable;
3111 static asection *synthetic_opd;
3112
3113 /* qsort comparison function for ppc64_elf_get_synthetic_symtab. */
3114
3115 static int
3116 compare_symbols (const void *ap, const void *bp)
3117 {
3118 const asymbol *a = * (const asymbol **) ap;
3119 const asymbol *b = * (const asymbol **) bp;
3120
3121 /* Section symbols first. */
3122 if ((a->flags & BSF_SECTION_SYM) && !(b->flags & BSF_SECTION_SYM))
3123 return -1;
3124 if (!(a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM))
3125 return 1;
3126
3127 /* then .opd symbols. */
3128 if (synthetic_opd != NULL)
3129 {
3130 if (strcmp (a->section->name, ".opd") == 0
3131 && strcmp (b->section->name, ".opd") != 0)
3132 return -1;
3133 if (strcmp (a->section->name, ".opd") != 0
3134 && strcmp (b->section->name, ".opd") == 0)
3135 return 1;
3136 }
3137
3138 /* then other code symbols. */
3139 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3140 == (SEC_CODE | SEC_ALLOC)
3141 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3142 != (SEC_CODE | SEC_ALLOC))
3143 return -1;
3144
3145 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3146 != (SEC_CODE | SEC_ALLOC)
3147 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3148 == (SEC_CODE | SEC_ALLOC))
3149 return 1;
3150
3151 if (synthetic_relocatable)
3152 {
3153 if (a->section->id < b->section->id)
3154 return -1;
3155
3156 if (a->section->id > b->section->id)
3157 return 1;
3158 }
3159
3160 if (a->value + a->section->vma < b->value + b->section->vma)
3161 return -1;
3162
3163 if (a->value + a->section->vma > b->value + b->section->vma)
3164 return 1;
3165
3166 /* For syms with the same value, prefer strong dynamic global function
3167 syms over other syms. */
3168 if ((a->flags & BSF_GLOBAL) != 0 && (b->flags & BSF_GLOBAL) == 0)
3169 return -1;
3170
3171 if ((a->flags & BSF_GLOBAL) == 0 && (b->flags & BSF_GLOBAL) != 0)
3172 return 1;
3173
3174 if ((a->flags & BSF_FUNCTION) != 0 && (b->flags & BSF_FUNCTION) == 0)
3175 return -1;
3176
3177 if ((a->flags & BSF_FUNCTION) == 0 && (b->flags & BSF_FUNCTION) != 0)
3178 return 1;
3179
3180 if ((a->flags & BSF_WEAK) == 0 && (b->flags & BSF_WEAK) != 0)
3181 return -1;
3182
3183 if ((a->flags & BSF_WEAK) != 0 && (b->flags & BSF_WEAK) == 0)
3184 return 1;
3185
3186 if ((a->flags & BSF_DYNAMIC) != 0 && (b->flags & BSF_DYNAMIC) == 0)
3187 return -1;
3188
3189 if ((a->flags & BSF_DYNAMIC) == 0 && (b->flags & BSF_DYNAMIC) != 0)
3190 return 1;
3191
3192 return a > b;
3193 }
3194
3195 /* Search SYMS for a symbol of the given VALUE. */
3196
3197 static asymbol *
3198 sym_exists_at (asymbol **syms, long lo, long hi, unsigned int id, bfd_vma value)
3199 {
3200 long mid;
3201
3202 if (id == (unsigned) -1)
3203 {
3204 while (lo < hi)
3205 {
3206 mid = (lo + hi) >> 1;
3207 if (syms[mid]->value + syms[mid]->section->vma < value)
3208 lo = mid + 1;
3209 else if (syms[mid]->value + syms[mid]->section->vma > value)
3210 hi = mid;
3211 else
3212 return syms[mid];
3213 }
3214 }
3215 else
3216 {
3217 while (lo < hi)
3218 {
3219 mid = (lo + hi) >> 1;
3220 if (syms[mid]->section->id < id)
3221 lo = mid + 1;
3222 else if (syms[mid]->section->id > id)
3223 hi = mid;
3224 else if (syms[mid]->value < value)
3225 lo = mid + 1;
3226 else if (syms[mid]->value > value)
3227 hi = mid;
3228 else
3229 return syms[mid];
3230 }
3231 }
3232 return NULL;
3233 }
3234
3235 static bfd_boolean
3236 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
3237 {
3238 bfd_vma vma = *(bfd_vma *) ptr;
3239 return ((section->flags & SEC_ALLOC) != 0
3240 && section->vma <= vma
3241 && vma < section->vma + section->size);
3242 }
3243
3244 /* Create synthetic symbols, effectively restoring "dot-symbol" function
3245 entry syms. Also generate @plt symbols for the glink branch table.
3246 Returns count of synthetic symbols in RET or -1 on error. */
3247
3248 static long
3249 ppc64_elf_get_synthetic_symtab (bfd *abfd,
3250 long static_count, asymbol **static_syms,
3251 long dyn_count, asymbol **dyn_syms,
3252 asymbol **ret)
3253 {
3254 asymbol *s;
3255 long i;
3256 long count;
3257 char *names;
3258 long symcount, codesecsym, codesecsymend, secsymend, opdsymend;
3259 asection *opd = NULL;
3260 bfd_boolean relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0;
3261 asymbol **syms;
3262 int abi = abiversion (abfd);
3263
3264 *ret = NULL;
3265
3266 if (abi < 2)
3267 {
3268 opd = bfd_get_section_by_name (abfd, ".opd");
3269 if (opd == NULL && abi == 1)
3270 return 0;
3271 }
3272
3273 syms = NULL;
3274 codesecsym = 0;
3275 codesecsymend = 0;
3276 secsymend = 0;
3277 opdsymend = 0;
3278 symcount = 0;
3279 if (opd != NULL)
3280 {
3281 symcount = static_count;
3282 if (!relocatable)
3283 symcount += dyn_count;
3284 if (symcount == 0)
3285 return 0;
3286
3287 syms = bfd_malloc ((symcount + 1) * sizeof (*syms));
3288 if (syms == NULL)
3289 return -1;
3290
3291 if (!relocatable && static_count != 0 && dyn_count != 0)
3292 {
3293 /* Use both symbol tables. */
3294 memcpy (syms, static_syms, static_count * sizeof (*syms));
3295 memcpy (syms + static_count, dyn_syms,
3296 (dyn_count + 1) * sizeof (*syms));
3297 }
3298 else if (!relocatable && static_count == 0)
3299 memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms));
3300 else
3301 memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms));
3302
3303 synthetic_relocatable = relocatable;
3304 synthetic_opd = opd;
3305 qsort (syms, symcount, sizeof (*syms), compare_symbols);
3306
3307 if (!relocatable && symcount > 1)
3308 {
3309 long j;
3310 /* Trim duplicate syms, since we may have merged the normal and
3311 dynamic symbols. Actually, we only care about syms that have
3312 different values, so trim any with the same value. */
3313 for (i = 1, j = 1; i < symcount; ++i)
3314 if (syms[i - 1]->value + syms[i - 1]->section->vma
3315 != syms[i]->value + syms[i]->section->vma)
3316 syms[j++] = syms[i];
3317 symcount = j;
3318 }
3319
3320 i = 0;
3321 /* Note that here and in compare_symbols we can't compare opd and
3322 sym->section directly. With separate debug info files, the
3323 symbols will be extracted from the debug file while abfd passed
3324 to this function is the real binary. */
3325 if (opd != NULL && strcmp (syms[i]->section->name, ".opd") == 0)
3326 ++i;
3327 codesecsym = i;
3328
3329 for (; i < symcount; ++i)
3330 if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC
3331 | SEC_THREAD_LOCAL))
3332 != (SEC_CODE | SEC_ALLOC))
3333 || (syms[i]->flags & BSF_SECTION_SYM) == 0)
3334 break;
3335 codesecsymend = i;
3336
3337 for (; i < symcount; ++i)
3338 if ((syms[i]->flags & BSF_SECTION_SYM) == 0)
3339 break;
3340 secsymend = i;
3341
3342 for (; i < symcount; ++i)
3343 if (strcmp (syms[i]->section->name, ".opd") != 0)
3344 break;
3345 opdsymend = i;
3346
3347 for (; i < symcount; ++i)
3348 if ((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3349 != (SEC_CODE | SEC_ALLOC))
3350 break;
3351 symcount = i;
3352 }
3353 count = 0;
3354
3355 if (relocatable)
3356 {
3357 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3358 arelent *r;
3359 size_t size;
3360 long relcount;
3361
3362 if (opdsymend == secsymend)
3363 goto done;
3364
3365 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3366 relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0;
3367 if (relcount == 0)
3368 goto done;
3369
3370 if (!(*slurp_relocs) (abfd, opd, static_syms, FALSE))
3371 {
3372 count = -1;
3373 goto done;
3374 }
3375
3376 size = 0;
3377 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3378 {
3379 asymbol *sym;
3380
3381 while (r < opd->relocation + relcount
3382 && r->address < syms[i]->value + opd->vma)
3383 ++r;
3384
3385 if (r == opd->relocation + relcount)
3386 break;
3387
3388 if (r->address != syms[i]->value + opd->vma)
3389 continue;
3390
3391 if (r->howto->type != R_PPC64_ADDR64)
3392 continue;
3393
3394 sym = *r->sym_ptr_ptr;
3395 if (!sym_exists_at (syms, opdsymend, symcount,
3396 sym->section->id, sym->value + r->addend))
3397 {
3398 ++count;
3399 size += sizeof (asymbol);
3400 size += strlen (syms[i]->name) + 2;
3401 }
3402 }
3403
3404 if (size == 0)
3405 goto done;
3406 s = *ret = bfd_malloc (size);
3407 if (s == NULL)
3408 {
3409 count = -1;
3410 goto done;
3411 }
3412
3413 names = (char *) (s + count);
3414
3415 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3416 {
3417 asymbol *sym;
3418
3419 while (r < opd->relocation + relcount
3420 && r->address < syms[i]->value + opd->vma)
3421 ++r;
3422
3423 if (r == opd->relocation + relcount)
3424 break;
3425
3426 if (r->address != syms[i]->value + opd->vma)
3427 continue;
3428
3429 if (r->howto->type != R_PPC64_ADDR64)
3430 continue;
3431
3432 sym = *r->sym_ptr_ptr;
3433 if (!sym_exists_at (syms, opdsymend, symcount,
3434 sym->section->id, sym->value + r->addend))
3435 {
3436 size_t len;
3437
3438 *s = *syms[i];
3439 s->flags |= BSF_SYNTHETIC;
3440 s->section = sym->section;
3441 s->value = sym->value + r->addend;
3442 s->name = names;
3443 *names++ = '.';
3444 len = strlen (syms[i]->name);
3445 memcpy (names, syms[i]->name, len + 1);
3446 names += len + 1;
3447 /* Have udata.p point back to the original symbol this
3448 synthetic symbol was derived from. */
3449 s->udata.p = syms[i];
3450 s++;
3451 }
3452 }
3453 }
3454 else
3455 {
3456 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3457 bfd_byte *contents = NULL;
3458 size_t size;
3459 long plt_count = 0;
3460 bfd_vma glink_vma = 0, resolv_vma = 0;
3461 asection *dynamic, *glink = NULL, *relplt = NULL;
3462 arelent *p;
3463
3464 if (opd != NULL && !bfd_malloc_and_get_section (abfd, opd, &contents))
3465 {
3466 free_contents_and_exit_err:
3467 count = -1;
3468 free_contents_and_exit:
3469 if (contents)
3470 free (contents);
3471 goto done;
3472 }
3473
3474 size = 0;
3475 for (i = secsymend; i < opdsymend; ++i)
3476 {
3477 bfd_vma ent;
3478
3479 /* Ignore bogus symbols. */
3480 if (syms[i]->value > opd->size - 8)
3481 continue;
3482
3483 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3484 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3485 {
3486 ++count;
3487 size += sizeof (asymbol);
3488 size += strlen (syms[i]->name) + 2;
3489 }
3490 }
3491
3492 /* Get start of .glink stubs from DT_PPC64_GLINK. */
3493 if (dyn_count != 0
3494 && (dynamic = bfd_get_section_by_name (abfd, ".dynamic")) != NULL)
3495 {
3496 bfd_byte *dynbuf, *extdyn, *extdynend;
3497 size_t extdynsize;
3498 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
3499
3500 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
3501 goto free_contents_and_exit_err;
3502
3503 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
3504 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
3505
3506 extdyn = dynbuf;
3507 extdynend = extdyn + dynamic->size;
3508 for (; extdyn < extdynend; extdyn += extdynsize)
3509 {
3510 Elf_Internal_Dyn dyn;
3511 (*swap_dyn_in) (abfd, extdyn, &dyn);
3512
3513 if (dyn.d_tag == DT_NULL)
3514 break;
3515
3516 if (dyn.d_tag == DT_PPC64_GLINK)
3517 {
3518 /* The first glink stub starts at offset 32; see
3519 comment in ppc64_elf_finish_dynamic_sections. */
3520 glink_vma = dyn.d_un.d_val + GLINK_CALL_STUB_SIZE - 8 * 4;
3521 /* The .glink section usually does not survive the final
3522 link; search for the section (usually .text) where the
3523 glink stubs now reside. */
3524 glink = bfd_sections_find_if (abfd, section_covers_vma,
3525 &glink_vma);
3526 break;
3527 }
3528 }
3529
3530 free (dynbuf);
3531 }
3532
3533 if (glink != NULL)
3534 {
3535 /* Determine __glink trampoline by reading the relative branch
3536 from the first glink stub. */
3537 bfd_byte buf[4];
3538 unsigned int off = 0;
3539
3540 while (bfd_get_section_contents (abfd, glink, buf,
3541 glink_vma + off - glink->vma, 4))
3542 {
3543 unsigned int insn = bfd_get_32 (abfd, buf);
3544 insn ^= B_DOT;
3545 if ((insn & ~0x3fffffc) == 0)
3546 {
3547 resolv_vma = glink_vma + off + (insn ^ 0x2000000) - 0x2000000;
3548 break;
3549 }
3550 off += 4;
3551 if (off > 4)
3552 break;
3553 }
3554
3555 if (resolv_vma)
3556 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
3557
3558 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
3559 if (relplt != NULL)
3560 {
3561 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3562 if (! (*slurp_relocs) (abfd, relplt, dyn_syms, TRUE))
3563 goto free_contents_and_exit_err;
3564
3565 plt_count = relplt->size / sizeof (Elf64_External_Rela);
3566 size += plt_count * sizeof (asymbol);
3567
3568 p = relplt->relocation;
3569 for (i = 0; i < plt_count; i++, p++)
3570 {
3571 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
3572 if (p->addend != 0)
3573 size += sizeof ("+0x") - 1 + 16;
3574 }
3575 }
3576 }
3577
3578 if (size == 0)
3579 goto free_contents_and_exit;
3580 s = *ret = bfd_malloc (size);
3581 if (s == NULL)
3582 goto free_contents_and_exit_err;
3583
3584 names = (char *) (s + count + plt_count + (resolv_vma != 0));
3585
3586 for (i = secsymend; i < opdsymend; ++i)
3587 {
3588 bfd_vma ent;
3589
3590 if (syms[i]->value > opd->size - 8)
3591 continue;
3592
3593 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3594 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3595 {
3596 long lo, hi;
3597 size_t len;
3598 asection *sec = abfd->sections;
3599
3600 *s = *syms[i];
3601 lo = codesecsym;
3602 hi = codesecsymend;
3603 while (lo < hi)
3604 {
3605 long mid = (lo + hi) >> 1;
3606 if (syms[mid]->section->vma < ent)
3607 lo = mid + 1;
3608 else if (syms[mid]->section->vma > ent)
3609 hi = mid;
3610 else
3611 {
3612 sec = syms[mid]->section;
3613 break;
3614 }
3615 }
3616
3617 if (lo >= hi && lo > codesecsym)
3618 sec = syms[lo - 1]->section;
3619
3620 for (; sec != NULL; sec = sec->next)
3621 {
3622 if (sec->vma > ent)
3623 break;
3624 /* SEC_LOAD may not be set if SEC is from a separate debug
3625 info file. */
3626 if ((sec->flags & SEC_ALLOC) == 0)
3627 break;
3628 if ((sec->flags & SEC_CODE) != 0)
3629 s->section = sec;
3630 }
3631 s->flags |= BSF_SYNTHETIC;
3632 s->value = ent - s->section->vma;
3633 s->name = names;
3634 *names++ = '.';
3635 len = strlen (syms[i]->name);
3636 memcpy (names, syms[i]->name, len + 1);
3637 names += len + 1;
3638 /* Have udata.p point back to the original symbol this
3639 synthetic symbol was derived from. */
3640 s->udata.p = syms[i];
3641 s++;
3642 }
3643 }
3644 free (contents);
3645
3646 if (glink != NULL && relplt != NULL)
3647 {
3648 if (resolv_vma)
3649 {
3650 /* Add a symbol for the main glink trampoline. */
3651 memset (s, 0, sizeof *s);
3652 s->the_bfd = abfd;
3653 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3654 s->section = glink;
3655 s->value = resolv_vma - glink->vma;
3656 s->name = names;
3657 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3658 names += sizeof ("__glink_PLTresolve");
3659 s++;
3660 count++;
3661 }
3662
3663 /* FIXME: It would be very much nicer to put sym@plt on the
3664 stub rather than on the glink branch table entry. The
3665 objdump disassembler would then use a sensible symbol
3666 name on plt calls. The difficulty in doing so is
3667 a) finding the stubs, and,
3668 b) matching stubs against plt entries, and,
3669 c) there can be multiple stubs for a given plt entry.
3670
3671 Solving (a) could be done by code scanning, but older
3672 ppc64 binaries used different stubs to current code.
3673 (b) is the tricky one since you need to known the toc
3674 pointer for at least one function that uses a pic stub to
3675 be able to calculate the plt address referenced.
3676 (c) means gdb would need to set multiple breakpoints (or
3677 find the glink branch itself) when setting breakpoints
3678 for pending shared library loads. */
3679 p = relplt->relocation;
3680 for (i = 0; i < plt_count; i++, p++)
3681 {
3682 size_t len;
3683
3684 *s = **p->sym_ptr_ptr;
3685 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
3686 we are defining a symbol, ensure one of them is set. */
3687 if ((s->flags & BSF_LOCAL) == 0)
3688 s->flags |= BSF_GLOBAL;
3689 s->flags |= BSF_SYNTHETIC;
3690 s->section = glink;
3691 s->value = glink_vma - glink->vma;
3692 s->name = names;
3693 s->udata.p = NULL;
3694 len = strlen ((*p->sym_ptr_ptr)->name);
3695 memcpy (names, (*p->sym_ptr_ptr)->name, len);
3696 names += len;
3697 if (p->addend != 0)
3698 {
3699 memcpy (names, "+0x", sizeof ("+0x") - 1);
3700 names += sizeof ("+0x") - 1;
3701 bfd_sprintf_vma (abfd, names, p->addend);
3702 names += strlen (names);
3703 }
3704 memcpy (names, "@plt", sizeof ("@plt"));
3705 names += sizeof ("@plt");
3706 s++;
3707 if (abi < 2)
3708 {
3709 glink_vma += 8;
3710 if (i >= 0x8000)
3711 glink_vma += 4;
3712 }
3713 else
3714 glink_vma += 4;
3715 }
3716 count += plt_count;
3717 }
3718 }
3719
3720 done:
3721 free (syms);
3722 return count;
3723 }
3724 \f
3725 /* The following functions are specific to the ELF linker, while
3726 functions above are used generally. Those named ppc64_elf_* are
3727 called by the main ELF linker code. They appear in this file more
3728 or less in the order in which they are called. eg.
3729 ppc64_elf_check_relocs is called early in the link process,
3730 ppc64_elf_finish_dynamic_sections is one of the last functions
3731 called.
3732
3733 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
3734 functions have both a function code symbol and a function descriptor
3735 symbol. A call to foo in a relocatable object file looks like:
3736
3737 . .text
3738 . x:
3739 . bl .foo
3740 . nop
3741
3742 The function definition in another object file might be:
3743
3744 . .section .opd
3745 . foo: .quad .foo
3746 . .quad .TOC.@tocbase
3747 . .quad 0
3748 .
3749 . .text
3750 . .foo: blr
3751
3752 When the linker resolves the call during a static link, the branch
3753 unsurprisingly just goes to .foo and the .opd information is unused.
3754 If the function definition is in a shared library, things are a little
3755 different: The call goes via a plt call stub, the opd information gets
3756 copied to the plt, and the linker patches the nop.
3757
3758 . x:
3759 . bl .foo_stub
3760 . ld 2,40(1)
3761 .
3762 .
3763 . .foo_stub:
3764 . std 2,40(1) # in practice, the call stub
3765 . addis 11,2,Lfoo@toc@ha # is slightly optimized, but
3766 . addi 11,11,Lfoo@toc@l # this is the general idea
3767 . ld 12,0(11)
3768 . ld 2,8(11)
3769 . mtctr 12
3770 . ld 11,16(11)
3771 . bctr
3772 .
3773 . .section .plt
3774 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
3775
3776 The "reloc ()" notation is supposed to indicate that the linker emits
3777 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
3778 copying.
3779
3780 What are the difficulties here? Well, firstly, the relocations
3781 examined by the linker in check_relocs are against the function code
3782 sym .foo, while the dynamic relocation in the plt is emitted against
3783 the function descriptor symbol, foo. Somewhere along the line, we need
3784 to carefully copy dynamic link information from one symbol to the other.
3785 Secondly, the generic part of the elf linker will make .foo a dynamic
3786 symbol as is normal for most other backends. We need foo dynamic
3787 instead, at least for an application final link. However, when
3788 creating a shared library containing foo, we need to have both symbols
3789 dynamic so that references to .foo are satisfied during the early
3790 stages of linking. Otherwise the linker might decide to pull in a
3791 definition from some other object, eg. a static library.
3792
3793 Update: As of August 2004, we support a new convention. Function
3794 calls may use the function descriptor symbol, ie. "bl foo". This
3795 behaves exactly as "bl .foo". */
3796
3797 /* Of those relocs that might be copied as dynamic relocs, this
3798 function selects those that must be copied when linking a shared
3799 library or PIE, even when the symbol is local. */
3800
3801 static int
3802 must_be_dyn_reloc (struct bfd_link_info *info,
3803 enum elf_ppc64_reloc_type r_type)
3804 {
3805 switch (r_type)
3806 {
3807 default:
3808 /* Only relative relocs can be resolved when the object load
3809 address isn't fixed. DTPREL64 is excluded because the
3810 dynamic linker needs to differentiate global dynamic from
3811 local dynamic __tls_index pairs when PPC64_OPT_TLS is set. */
3812 return 1;
3813
3814 case R_PPC64_REL32:
3815 case R_PPC64_REL64:
3816 case R_PPC64_REL30:
3817 return 0;
3818
3819 case R_PPC64_TPREL16:
3820 case R_PPC64_TPREL16_LO:
3821 case R_PPC64_TPREL16_HI:
3822 case R_PPC64_TPREL16_HA:
3823 case R_PPC64_TPREL16_DS:
3824 case R_PPC64_TPREL16_LO_DS:
3825 case R_PPC64_TPREL16_HIGH:
3826 case R_PPC64_TPREL16_HIGHA:
3827 case R_PPC64_TPREL16_HIGHER:
3828 case R_PPC64_TPREL16_HIGHERA:
3829 case R_PPC64_TPREL16_HIGHEST:
3830 case R_PPC64_TPREL16_HIGHESTA:
3831 case R_PPC64_TPREL64:
3832 /* These relocations are relative but in a shared library the
3833 linker doesn't know the thread pointer base. */
3834 return bfd_link_dll (info);
3835 }
3836 }
3837
3838 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3839 copying dynamic variables from a shared lib into an app's dynbss
3840 section, and instead use a dynamic relocation to point into the
3841 shared lib. With code that gcc generates, it's vital that this be
3842 enabled; In the PowerPC64 ABI, the address of a function is actually
3843 the address of a function descriptor, which resides in the .opd
3844 section. gcc uses the descriptor directly rather than going via the
3845 GOT as some other ABI's do, which means that initialized function
3846 pointers must reference the descriptor. Thus, a function pointer
3847 initialized to the address of a function in a shared library will
3848 either require a copy reloc, or a dynamic reloc. Using a copy reloc
3849 redefines the function descriptor symbol to point to the copy. This
3850 presents a problem as a plt entry for that function is also
3851 initialized from the function descriptor symbol and the copy reloc
3852 may not be initialized first. */
3853 #define ELIMINATE_COPY_RELOCS 1
3854
3855 /* Section name for stubs is the associated section name plus this
3856 string. */
3857 #define STUB_SUFFIX ".stub"
3858
3859 /* Linker stubs.
3860 ppc_stub_long_branch:
3861 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
3862 destination, but a 24 bit branch in a stub section will reach.
3863 . b dest
3864
3865 ppc_stub_plt_branch:
3866 Similar to the above, but a 24 bit branch in the stub section won't
3867 reach its destination.
3868 . addis %r11,%r2,xxx@toc@ha
3869 . ld %r12,xxx@toc@l(%r11)
3870 . mtctr %r12
3871 . bctr
3872
3873 ppc_stub_plt_call:
3874 Used to call a function in a shared library. If it so happens that
3875 the plt entry referenced crosses a 64k boundary, then an extra
3876 "addi %r11,%r11,xxx@toc@l" will be inserted before the "mtctr".
3877 . std %r2,40(%r1)
3878 . addis %r11,%r2,xxx@toc@ha
3879 . ld %r12,xxx+0@toc@l(%r11)
3880 . mtctr %r12
3881 . ld %r2,xxx+8@toc@l(%r11)
3882 . ld %r11,xxx+16@toc@l(%r11)
3883 . bctr
3884
3885 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
3886 code to adjust the value and save r2 to support multiple toc sections.
3887 A ppc_stub_long_branch with an r2 offset looks like:
3888 . std %r2,40(%r1)
3889 . addis %r2,%r2,off@ha
3890 . addi %r2,%r2,off@l
3891 . b dest
3892
3893 A ppc_stub_plt_branch with an r2 offset looks like:
3894 . std %r2,40(%r1)
3895 . addis %r11,%r2,xxx@toc@ha
3896 . ld %r12,xxx@toc@l(%r11)
3897 . addis %r2,%r2,off@ha
3898 . addi %r2,%r2,off@l
3899 . mtctr %r12
3900 . bctr
3901
3902 In cases where the "addis" instruction would add zero, the "addis" is
3903 omitted and following instructions modified slightly in some cases.
3904 */
3905
3906 enum ppc_stub_type {
3907 ppc_stub_none,
3908 ppc_stub_long_branch,
3909 ppc_stub_long_branch_r2off,
3910 ppc_stub_plt_branch,
3911 ppc_stub_plt_branch_r2off,
3912 ppc_stub_plt_call,
3913 ppc_stub_plt_call_r2save,
3914 ppc_stub_global_entry,
3915 ppc_stub_save_res
3916 };
3917
3918 /* Information on stub grouping. */
3919 struct map_stub
3920 {
3921 /* The stub section. */
3922 asection *stub_sec;
3923 /* This is the section to which stubs in the group will be attached. */
3924 asection *link_sec;
3925 /* Next group. */
3926 struct map_stub *next;
3927 /* Whether to emit a copy of register save/restore functions in this
3928 group. */
3929 int needs_save_res;
3930 /* The offset of the __tls_get_addr_opt plt stub bctrl in this group,
3931 or -1u if no such stub with bctrl exists. */
3932 unsigned int tls_get_addr_opt_bctrl;
3933 };
3934
3935 struct ppc_stub_hash_entry {
3936
3937 /* Base hash table entry structure. */
3938 struct bfd_hash_entry root;
3939
3940 enum ppc_stub_type stub_type;
3941
3942 /* Group information. */
3943 struct map_stub *group;
3944
3945 /* Offset within stub_sec of the beginning of this stub. */
3946 bfd_vma stub_offset;
3947
3948 /* Given the symbol's value and its section we can determine its final
3949 value when building the stubs (so the stub knows where to jump. */
3950 bfd_vma target_value;
3951 asection *target_section;
3952
3953 /* The symbol table entry, if any, that this was derived from. */
3954 struct ppc_link_hash_entry *h;
3955 struct plt_entry *plt_ent;
3956
3957 /* Symbol st_other. */
3958 unsigned char other;
3959 };
3960
3961 struct ppc_branch_hash_entry {
3962
3963 /* Base hash table entry structure. */
3964 struct bfd_hash_entry root;
3965
3966 /* Offset within branch lookup table. */
3967 unsigned int offset;
3968
3969 /* Generation marker. */
3970 unsigned int iter;
3971 };
3972
3973 /* Used to track dynamic relocations for local symbols. */
3974 struct ppc_dyn_relocs
3975 {
3976 struct ppc_dyn_relocs *next;
3977
3978 /* The input section of the reloc. */
3979 asection *sec;
3980
3981 /* Total number of relocs copied for the input section. */
3982 unsigned int count : 31;
3983
3984 /* Whether this entry is for STT_GNU_IFUNC symbols. */
3985 unsigned int ifunc : 1;
3986 };
3987
3988 struct ppc_link_hash_entry
3989 {
3990 struct elf_link_hash_entry elf;
3991
3992 union {
3993 /* A pointer to the most recently used stub hash entry against this
3994 symbol. */
3995 struct ppc_stub_hash_entry *stub_cache;
3996
3997 /* A pointer to the next symbol starting with a '.' */
3998 struct ppc_link_hash_entry *next_dot_sym;
3999 } u;
4000
4001 /* Track dynamic relocs copied for this symbol. */
4002 struct elf_dyn_relocs *dyn_relocs;
4003
4004 /* Chain of aliases referring to a weakdef. */
4005 struct ppc_link_hash_entry *weakref;
4006
4007 /* Link between function code and descriptor symbols. */
4008 struct ppc_link_hash_entry *oh;
4009
4010 /* Flag function code and descriptor symbols. */
4011 unsigned int is_func:1;
4012 unsigned int is_func_descriptor:1;
4013 unsigned int fake:1;
4014
4015 /* Whether global opd/toc sym has been adjusted or not.
4016 After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
4017 should be set for all globals defined in any opd/toc section. */
4018 unsigned int adjust_done:1;
4019
4020 /* Set if this is an out-of-line register save/restore function,
4021 with non-standard calling convention. */
4022 unsigned int save_res:1;
4023
4024 /* Set if a duplicate symbol with non-zero localentry is detected,
4025 even when the duplicate symbol does not provide a definition. */
4026 unsigned int non_zero_localentry:1;
4027
4028 /* Contexts in which symbol is used in the GOT (or TOC).
4029 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
4030 corresponding relocs are encountered during check_relocs.
4031 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
4032 indicate the corresponding GOT entry type is not needed.
4033 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
4034 a TPREL one. We use a separate flag rather than setting TPREL
4035 just for convenience in distinguishing the two cases. */
4036 #define TLS_GD 1 /* GD reloc. */
4037 #define TLS_LD 2 /* LD reloc. */
4038 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
4039 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
4040 #define TLS_TLS 16 /* Any TLS reloc. */
4041 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
4042 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
4043 #define PLT_IFUNC 128 /* STT_GNU_IFUNC. */
4044 unsigned char tls_mask;
4045 };
4046
4047 /* ppc64 ELF linker hash table. */
4048
4049 struct ppc_link_hash_table
4050 {
4051 struct elf_link_hash_table elf;
4052
4053 /* The stub hash table. */
4054 struct bfd_hash_table stub_hash_table;
4055
4056 /* Another hash table for plt_branch stubs. */
4057 struct bfd_hash_table branch_hash_table;
4058
4059 /* Hash table for function prologue tocsave. */
4060 htab_t tocsave_htab;
4061
4062 /* Various options and other info passed from the linker. */
4063 struct ppc64_elf_params *params;
4064
4065 /* The size of sec_info below. */
4066 unsigned int sec_info_arr_size;
4067
4068 /* Per-section array of extra section info. Done this way rather
4069 than as part of ppc64_elf_section_data so we have the info for
4070 non-ppc64 sections. */
4071 struct
4072 {
4073 /* Along with elf_gp, specifies the TOC pointer used by this section. */
4074 bfd_vma toc_off;
4075
4076 union
4077 {
4078 /* The section group that this section belongs to. */
4079 struct map_stub *group;
4080 /* A temp section list pointer. */
4081 asection *list;
4082 } u;
4083 } *sec_info;
4084
4085 /* Linked list of groups. */
4086 struct map_stub *group;
4087
4088 /* Temp used when calculating TOC pointers. */
4089 bfd_vma toc_curr;
4090 bfd *toc_bfd;
4091 asection *toc_first_sec;
4092
4093 /* Used when adding symbols. */
4094 struct ppc_link_hash_entry *dot_syms;
4095
4096 /* Shortcuts to get to dynamic linker sections. */
4097 asection *glink;
4098 asection *sfpr;
4099 asection *brlt;
4100 asection *relbrlt;
4101 asection *glink_eh_frame;
4102
4103 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
4104 struct ppc_link_hash_entry *tls_get_addr;
4105 struct ppc_link_hash_entry *tls_get_addr_fd;
4106
4107 /* The size of reliplt used by got entry relocs. */
4108 bfd_size_type got_reli_size;
4109
4110 /* Statistics. */
4111 unsigned long stub_count[ppc_stub_global_entry];
4112
4113 /* Number of stubs against global syms. */
4114 unsigned long stub_globals;
4115
4116 /* Set if we're linking code with function descriptors. */
4117 unsigned int opd_abi:1;
4118
4119 /* Support for multiple toc sections. */
4120 unsigned int do_multi_toc:1;
4121 unsigned int multi_toc_needed:1;
4122 unsigned int second_toc_pass:1;
4123 unsigned int do_toc_opt:1;
4124
4125 /* Set if tls optimization is enabled. */
4126 unsigned int do_tls_opt:1;
4127
4128 /* Set on error. */
4129 unsigned int stub_error:1;
4130
4131 /* Whether func_desc_adjust needs to be run over symbols. */
4132 unsigned int need_func_desc_adj:1;
4133
4134 /* Whether there exist local gnu indirect function resolvers,
4135 referenced by dynamic relocations. */
4136 unsigned int local_ifunc_resolver:1;
4137 unsigned int maybe_local_ifunc_resolver:1;
4138
4139 /* Whether plt calls for ELFv2 localentry:0 funcs have been optimized. */
4140 unsigned int has_plt_localentry0:1;
4141
4142 /* Incremented every time we size stubs. */
4143 unsigned int stub_iteration;
4144
4145 /* Small local sym cache. */
4146 struct sym_cache sym_cache;
4147 };
4148
4149 /* Rename some of the generic section flags to better document how they
4150 are used here. */
4151
4152 /* Nonzero if this section has TLS related relocations. */
4153 #define has_tls_reloc sec_flg0
4154
4155 /* Nonzero if this section has a call to __tls_get_addr. */
4156 #define has_tls_get_addr_call sec_flg1
4157
4158 /* Nonzero if this section has any toc or got relocs. */
4159 #define has_toc_reloc sec_flg2
4160
4161 /* Nonzero if this section has a call to another section that uses
4162 the toc or got. */
4163 #define makes_toc_func_call sec_flg3
4164
4165 /* Recursion protection when determining above flag. */
4166 #define call_check_in_progress sec_flg4
4167 #define call_check_done sec_flg5
4168
4169 /* Get the ppc64 ELF linker hash table from a link_info structure. */
4170
4171 #define ppc_hash_table(p) \
4172 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
4173 == PPC64_ELF_DATA ? ((struct ppc_link_hash_table *) ((p)->hash)) : NULL)
4174
4175 #define ppc_stub_hash_lookup(table, string, create, copy) \
4176 ((struct ppc_stub_hash_entry *) \
4177 bfd_hash_lookup ((table), (string), (create), (copy)))
4178
4179 #define ppc_branch_hash_lookup(table, string, create, copy) \
4180 ((struct ppc_branch_hash_entry *) \
4181 bfd_hash_lookup ((table), (string), (create), (copy)))
4182
4183 /* Create an entry in the stub hash table. */
4184
4185 static struct bfd_hash_entry *
4186 stub_hash_newfunc (struct bfd_hash_entry *entry,
4187 struct bfd_hash_table *table,
4188 const char *string)
4189 {
4190 /* Allocate the structure if it has not already been allocated by a
4191 subclass. */
4192 if (entry == NULL)
4193 {
4194 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
4195 if (entry == NULL)
4196 return entry;
4197 }
4198
4199 /* Call the allocation method of the superclass. */
4200 entry = bfd_hash_newfunc (entry, table, string);
4201 if (entry != NULL)
4202 {
4203 struct ppc_stub_hash_entry *eh;
4204
4205 /* Initialize the local fields. */
4206 eh = (struct ppc_stub_hash_entry *) entry;
4207 eh->stub_type = ppc_stub_none;
4208 eh->group = NULL;
4209 eh->stub_offset = 0;
4210 eh->target_value = 0;
4211 eh->target_section = NULL;
4212 eh->h = NULL;
4213 eh->plt_ent = NULL;
4214 eh->other = 0;
4215 }
4216
4217 return entry;
4218 }
4219
4220 /* Create an entry in the branch hash table. */
4221
4222 static struct bfd_hash_entry *
4223 branch_hash_newfunc (struct bfd_hash_entry *entry,
4224 struct bfd_hash_table *table,
4225 const char *string)
4226 {
4227 /* Allocate the structure if it has not already been allocated by a
4228 subclass. */
4229 if (entry == NULL)
4230 {
4231 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
4232 if (entry == NULL)
4233 return entry;
4234 }
4235
4236 /* Call the allocation method of the superclass. */
4237 entry = bfd_hash_newfunc (entry, table, string);
4238 if (entry != NULL)
4239 {
4240 struct ppc_branch_hash_entry *eh;
4241
4242 /* Initialize the local fields. */
4243 eh = (struct ppc_branch_hash_entry *) entry;
4244 eh->offset = 0;
4245 eh->iter = 0;
4246 }
4247
4248 return entry;
4249 }
4250
4251 /* Create an entry in a ppc64 ELF linker hash table. */
4252
4253 static struct bfd_hash_entry *
4254 link_hash_newfunc (struct bfd_hash_entry *entry,
4255 struct bfd_hash_table *table,
4256 const char *string)
4257 {
4258 /* Allocate the structure if it has not already been allocated by a
4259 subclass. */
4260 if (entry == NULL)
4261 {
4262 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
4263 if (entry == NULL)
4264 return entry;
4265 }
4266
4267 /* Call the allocation method of the superclass. */
4268 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
4269 if (entry != NULL)
4270 {
4271 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
4272
4273 memset (&eh->u.stub_cache, 0,
4274 (sizeof (struct ppc_link_hash_entry)
4275 - offsetof (struct ppc_link_hash_entry, u.stub_cache)));
4276
4277 /* When making function calls, old ABI code references function entry
4278 points (dot symbols), while new ABI code references the function
4279 descriptor symbol. We need to make any combination of reference and
4280 definition work together, without breaking archive linking.
4281
4282 For a defined function "foo" and an undefined call to "bar":
4283 An old object defines "foo" and ".foo", references ".bar" (possibly
4284 "bar" too).
4285 A new object defines "foo" and references "bar".
4286
4287 A new object thus has no problem with its undefined symbols being
4288 satisfied by definitions in an old object. On the other hand, the
4289 old object won't have ".bar" satisfied by a new object.
4290
4291 Keep a list of newly added dot-symbols. */
4292
4293 if (string[0] == '.')
4294 {
4295 struct ppc_link_hash_table *htab;
4296
4297 htab = (struct ppc_link_hash_table *) table;
4298 eh->u.next_dot_sym = htab->dot_syms;
4299 htab->dot_syms = eh;
4300 }
4301 }
4302
4303 return entry;
4304 }
4305
4306 struct tocsave_entry {
4307 asection *sec;
4308 bfd_vma offset;
4309 };
4310
4311 static hashval_t
4312 tocsave_htab_hash (const void *p)
4313 {
4314 const struct tocsave_entry *e = (const struct tocsave_entry *) p;
4315 return ((bfd_vma) (intptr_t) e->sec ^ e->offset) >> 3;
4316 }
4317
4318 static int
4319 tocsave_htab_eq (const void *p1, const void *p2)
4320 {
4321 const struct tocsave_entry *e1 = (const struct tocsave_entry *) p1;
4322 const struct tocsave_entry *e2 = (const struct tocsave_entry *) p2;
4323 return e1->sec == e2->sec && e1->offset == e2->offset;
4324 }
4325
4326 /* Destroy a ppc64 ELF linker hash table. */
4327
4328 static void
4329 ppc64_elf_link_hash_table_free (bfd *obfd)
4330 {
4331 struct ppc_link_hash_table *htab;
4332
4333 htab = (struct ppc_link_hash_table *) obfd->link.hash;
4334 if (htab->tocsave_htab)
4335 htab_delete (htab->tocsave_htab);
4336 bfd_hash_table_free (&htab->branch_hash_table);
4337 bfd_hash_table_free (&htab->stub_hash_table);
4338 _bfd_elf_link_hash_table_free (obfd);
4339 }
4340
4341 /* Create a ppc64 ELF linker hash table. */
4342
4343 static struct bfd_link_hash_table *
4344 ppc64_elf_link_hash_table_create (bfd *abfd)
4345 {
4346 struct ppc_link_hash_table *htab;
4347 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
4348
4349 htab = bfd_zmalloc (amt);
4350 if (htab == NULL)
4351 return NULL;
4352
4353 if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc,
4354 sizeof (struct ppc_link_hash_entry),
4355 PPC64_ELF_DATA))
4356 {
4357 free (htab);
4358 return NULL;
4359 }
4360
4361 /* Init the stub hash table too. */
4362 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc,
4363 sizeof (struct ppc_stub_hash_entry)))
4364 {
4365 _bfd_elf_link_hash_table_free (abfd);
4366 return NULL;
4367 }
4368
4369 /* And the branch hash table. */
4370 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc,
4371 sizeof (struct ppc_branch_hash_entry)))
4372 {
4373 bfd_hash_table_free (&htab->stub_hash_table);
4374 _bfd_elf_link_hash_table_free (abfd);
4375 return NULL;
4376 }
4377
4378 htab->tocsave_htab = htab_try_create (1024,
4379 tocsave_htab_hash,
4380 tocsave_htab_eq,
4381 NULL);
4382 if (htab->tocsave_htab == NULL)
4383 {
4384 ppc64_elf_link_hash_table_free (abfd);
4385 return NULL;
4386 }
4387 htab->elf.root.hash_table_free = ppc64_elf_link_hash_table_free;
4388
4389 /* Initializing two fields of the union is just cosmetic. We really
4390 only care about glist, but when compiled on a 32-bit host the
4391 bfd_vma fields are larger. Setting the bfd_vma to zero makes
4392 debugger inspection of these fields look nicer. */
4393 htab->elf.init_got_refcount.refcount = 0;
4394 htab->elf.init_got_refcount.glist = NULL;
4395 htab->elf.init_plt_refcount.refcount = 0;
4396 htab->elf.init_plt_refcount.glist = NULL;
4397 htab->elf.init_got_offset.offset = 0;
4398 htab->elf.init_got_offset.glist = NULL;
4399 htab->elf.init_plt_offset.offset = 0;
4400 htab->elf.init_plt_offset.glist = NULL;
4401
4402 return &htab->elf.root;
4403 }
4404
4405 /* Create sections for linker generated code. */
4406
4407 static bfd_boolean
4408 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
4409 {
4410 struct ppc_link_hash_table *htab;
4411 flagword flags;
4412
4413 htab = ppc_hash_table (info);
4414
4415 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
4416 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4417 if (htab->params->save_restore_funcs)
4418 {
4419 /* Create .sfpr for code to save and restore fp regs. */
4420 htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr",
4421 flags);
4422 if (htab->sfpr == NULL
4423 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
4424 return FALSE;
4425 }
4426
4427 if (bfd_link_relocatable (info))
4428 return TRUE;
4429
4430 /* Create .glink for lazy dynamic linking support. */
4431 htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink",
4432 flags);
4433 if (htab->glink == NULL
4434 || ! bfd_set_section_alignment (dynobj, htab->glink, 3))
4435 return FALSE;
4436
4437 if (!info->no_ld_generated_unwind_info)
4438 {
4439 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
4440 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4441 htab->glink_eh_frame = bfd_make_section_anyway_with_flags (dynobj,
4442 ".eh_frame",
4443 flags);
4444 if (htab->glink_eh_frame == NULL
4445 || !bfd_set_section_alignment (dynobj, htab->glink_eh_frame, 2))
4446 return FALSE;
4447 }
4448
4449 flags = SEC_ALLOC | SEC_LINKER_CREATED;
4450 htab->elf.iplt = bfd_make_section_anyway_with_flags (dynobj, ".iplt", flags);
4451 if (htab->elf.iplt == NULL
4452 || ! bfd_set_section_alignment (dynobj, htab->elf.iplt, 3))
4453 return FALSE;
4454
4455 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4456 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4457 htab->elf.irelplt
4458 = bfd_make_section_anyway_with_flags (dynobj, ".rela.iplt", flags);
4459 if (htab->elf.irelplt == NULL
4460 || ! bfd_set_section_alignment (dynobj, htab->elf.irelplt, 3))
4461 return FALSE;
4462
4463 /* Create branch lookup table for plt_branch stubs. */
4464 flags = (SEC_ALLOC | SEC_LOAD
4465 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4466 htab->brlt = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt",
4467 flags);
4468 if (htab->brlt == NULL
4469 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
4470 return FALSE;
4471
4472 if (!bfd_link_pic (info))
4473 return TRUE;
4474
4475 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4476 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4477 htab->relbrlt = bfd_make_section_anyway_with_flags (dynobj,
4478 ".rela.branch_lt",
4479 flags);
4480 if (htab->relbrlt == NULL
4481 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
4482 return FALSE;
4483
4484 return TRUE;
4485 }
4486
4487 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
4488
4489 bfd_boolean
4490 ppc64_elf_init_stub_bfd (struct bfd_link_info *info,
4491 struct ppc64_elf_params *params)
4492 {
4493 struct ppc_link_hash_table *htab;
4494
4495 elf_elfheader (params->stub_bfd)->e_ident[EI_CLASS] = ELFCLASS64;
4496
4497 /* Always hook our dynamic sections into the first bfd, which is the
4498 linker created stub bfd. This ensures that the GOT header is at
4499 the start of the output TOC section. */
4500 htab = ppc_hash_table (info);
4501 htab->elf.dynobj = params->stub_bfd;
4502 htab->params = params;
4503
4504 return create_linkage_sections (htab->elf.dynobj, info);
4505 }
4506
4507 /* Build a name for an entry in the stub hash table. */
4508
4509 static char *
4510 ppc_stub_name (const asection *input_section,
4511 const asection *sym_sec,
4512 const struct ppc_link_hash_entry *h,
4513 const Elf_Internal_Rela *rel)
4514 {
4515 char *stub_name;
4516 ssize_t len;
4517
4518 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
4519 offsets from a sym as a branch target? In fact, we could
4520 probably assume the addend is always zero. */
4521 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
4522
4523 if (h)
4524 {
4525 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
4526 stub_name = bfd_malloc (len);
4527 if (stub_name == NULL)
4528 return stub_name;
4529
4530 len = sprintf (stub_name, "%08x.%s+%x",
4531 input_section->id & 0xffffffff,
4532 h->elf.root.root.string,
4533 (int) rel->r_addend & 0xffffffff);
4534 }
4535 else
4536 {
4537 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
4538 stub_name = bfd_malloc (len);
4539 if (stub_name == NULL)
4540 return stub_name;
4541
4542 len = sprintf (stub_name, "%08x.%x:%x+%x",
4543 input_section->id & 0xffffffff,
4544 sym_sec->id & 0xffffffff,
4545 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
4546 (int) rel->r_addend & 0xffffffff);
4547 }
4548 if (len > 2 && stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
4549 stub_name[len - 2] = 0;
4550 return stub_name;
4551 }
4552
4553 /* Look up an entry in the stub hash. Stub entries are cached because
4554 creating the stub name takes a bit of time. */
4555
4556 static struct ppc_stub_hash_entry *
4557 ppc_get_stub_entry (const asection *input_section,
4558 const asection *sym_sec,
4559 struct ppc_link_hash_entry *h,
4560 const Elf_Internal_Rela *rel,
4561 struct ppc_link_hash_table *htab)
4562 {
4563 struct ppc_stub_hash_entry *stub_entry;
4564 struct map_stub *group;
4565
4566 /* If this input section is part of a group of sections sharing one
4567 stub section, then use the id of the first section in the group.
4568 Stub names need to include a section id, as there may well be
4569 more than one stub used to reach say, printf, and we need to
4570 distinguish between them. */
4571 group = htab->sec_info[input_section->id].u.group;
4572 if (group == NULL)
4573 return NULL;
4574
4575 if (h != NULL && h->u.stub_cache != NULL
4576 && h->u.stub_cache->h == h
4577 && h->u.stub_cache->group == group)
4578 {
4579 stub_entry = h->u.stub_cache;
4580 }
4581 else
4582 {
4583 char *stub_name;
4584
4585 stub_name = ppc_stub_name (group->link_sec, sym_sec, h, rel);
4586 if (stub_name == NULL)
4587 return NULL;
4588
4589 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
4590 stub_name, FALSE, FALSE);
4591 if (h != NULL)
4592 h->u.stub_cache = stub_entry;
4593
4594 free (stub_name);
4595 }
4596
4597 return stub_entry;
4598 }
4599
4600 /* Add a new stub entry to the stub hash. Not all fields of the new
4601 stub entry are initialised. */
4602
4603 static struct ppc_stub_hash_entry *
4604 ppc_add_stub (const char *stub_name,
4605 asection *section,
4606 struct bfd_link_info *info)
4607 {
4608 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4609 struct map_stub *group;
4610 asection *link_sec;
4611 asection *stub_sec;
4612 struct ppc_stub_hash_entry *stub_entry;
4613
4614 group = htab->sec_info[section->id].u.group;
4615 link_sec = group->link_sec;
4616 stub_sec = group->stub_sec;
4617 if (stub_sec == NULL)
4618 {
4619 size_t namelen;
4620 bfd_size_type len;
4621 char *s_name;
4622
4623 namelen = strlen (link_sec->name);
4624 len = namelen + sizeof (STUB_SUFFIX);
4625 s_name = bfd_alloc (htab->params->stub_bfd, len);
4626 if (s_name == NULL)
4627 return NULL;
4628
4629 memcpy (s_name, link_sec->name, namelen);
4630 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
4631 stub_sec = (*htab->params->add_stub_section) (s_name, link_sec);
4632 if (stub_sec == NULL)
4633 return NULL;
4634 group->stub_sec = stub_sec;
4635 }
4636
4637 /* Enter this entry into the linker stub hash table. */
4638 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
4639 TRUE, FALSE);
4640 if (stub_entry == NULL)
4641 {
4642 /* xgettext:c-format */
4643 info->callbacks->einfo (_("%P: %B: cannot create stub entry %s\n"),
4644 section->owner, stub_name);
4645 return NULL;
4646 }
4647
4648 stub_entry->group = group;
4649 stub_entry->stub_offset = 0;
4650 return stub_entry;
4651 }
4652
4653 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
4654 not already done. */
4655
4656 static bfd_boolean
4657 create_got_section (bfd *abfd, struct bfd_link_info *info)
4658 {
4659 asection *got, *relgot;
4660 flagword flags;
4661 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4662
4663 if (!is_ppc64_elf (abfd))
4664 return FALSE;
4665 if (htab == NULL)
4666 return FALSE;
4667
4668 if (!htab->elf.sgot
4669 && !_bfd_elf_create_got_section (htab->elf.dynobj, info))
4670 return FALSE;
4671
4672 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
4673 | SEC_LINKER_CREATED);
4674
4675 got = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
4676 if (!got
4677 || !bfd_set_section_alignment (abfd, got, 3))
4678 return FALSE;
4679
4680 relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got",
4681 flags | SEC_READONLY);
4682 if (!relgot
4683 || ! bfd_set_section_alignment (abfd, relgot, 3))
4684 return FALSE;
4685
4686 ppc64_elf_tdata (abfd)->got = got;
4687 ppc64_elf_tdata (abfd)->relgot = relgot;
4688 return TRUE;
4689 }
4690
4691 /* Follow indirect and warning symbol links. */
4692
4693 static inline struct bfd_link_hash_entry *
4694 follow_link (struct bfd_link_hash_entry *h)
4695 {
4696 while (h->type == bfd_link_hash_indirect
4697 || h->type == bfd_link_hash_warning)
4698 h = h->u.i.link;
4699 return h;
4700 }
4701
4702 static inline struct elf_link_hash_entry *
4703 elf_follow_link (struct elf_link_hash_entry *h)
4704 {
4705 return (struct elf_link_hash_entry *) follow_link (&h->root);
4706 }
4707
4708 static inline struct ppc_link_hash_entry *
4709 ppc_follow_link (struct ppc_link_hash_entry *h)
4710 {
4711 return (struct ppc_link_hash_entry *) follow_link (&h->elf.root);
4712 }
4713
4714 /* Merge PLT info on FROM with that on TO. */
4715
4716 static void
4717 move_plt_plist (struct ppc_link_hash_entry *from,
4718 struct ppc_link_hash_entry *to)
4719 {
4720 if (from->elf.plt.plist != NULL)
4721 {
4722 if (to->elf.plt.plist != NULL)
4723 {
4724 struct plt_entry **entp;
4725 struct plt_entry *ent;
4726
4727 for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; )
4728 {
4729 struct plt_entry *dent;
4730
4731 for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next)
4732 if (dent->addend == ent->addend)
4733 {
4734 dent->plt.refcount += ent->plt.refcount;
4735 *entp = ent->next;
4736 break;
4737 }
4738 if (dent == NULL)
4739 entp = &ent->next;
4740 }
4741 *entp = to->elf.plt.plist;
4742 }
4743
4744 to->elf.plt.plist = from->elf.plt.plist;
4745 from->elf.plt.plist = NULL;
4746 }
4747 }
4748
4749 /* Copy the extra info we tack onto an elf_link_hash_entry. */
4750
4751 static void
4752 ppc64_elf_copy_indirect_symbol (struct bfd_link_info *info,
4753 struct elf_link_hash_entry *dir,
4754 struct elf_link_hash_entry *ind)
4755 {
4756 struct ppc_link_hash_entry *edir, *eind;
4757
4758 edir = (struct ppc_link_hash_entry *) dir;
4759 eind = (struct ppc_link_hash_entry *) ind;
4760
4761 edir->is_func |= eind->is_func;
4762 edir->is_func_descriptor |= eind->is_func_descriptor;
4763 edir->tls_mask |= eind->tls_mask;
4764 if (eind->oh != NULL)
4765 edir->oh = ppc_follow_link (eind->oh);
4766
4767 /* If called to transfer flags for a weakdef during processing
4768 of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF.
4769 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
4770 if (!(ELIMINATE_COPY_RELOCS
4771 && eind->elf.root.type != bfd_link_hash_indirect
4772 && edir->elf.dynamic_adjusted))
4773 edir->elf.non_got_ref |= eind->elf.non_got_ref;
4774
4775 if (edir->elf.versioned != versioned_hidden)
4776 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
4777 edir->elf.ref_regular |= eind->elf.ref_regular;
4778 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
4779 edir->elf.needs_plt |= eind->elf.needs_plt;
4780 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed;
4781
4782 /* If we were called to copy over info for a weak sym, don't copy
4783 dyn_relocs, plt/got info, or dynindx. We used to copy dyn_relocs
4784 in order to simplify readonly_dynrelocs and save a field in the
4785 symbol hash entry, but that means dyn_relocs can't be used in any
4786 tests about a specific symbol, or affect other symbol flags which
4787 are then tested.
4788 Chain weakdefs so we can get from the weakdef back to an alias.
4789 The list is circular so that we don't need to use u.weakdef as
4790 well as this list to look at all aliases. */
4791 if (eind->elf.root.type != bfd_link_hash_indirect)
4792 {
4793 struct ppc_link_hash_entry *cur, *add, *next;
4794
4795 add = eind;
4796 do
4797 {
4798 cur = edir->weakref;
4799 if (cur != NULL)
4800 {
4801 do
4802 {
4803 /* We can be called twice for the same symbols.
4804 Don't make multiple loops. */
4805 if (cur == add)
4806 return;
4807 cur = cur->weakref;
4808 } while (cur != edir);
4809 }
4810 next = add->weakref;
4811 if (cur != add)
4812 {
4813 add->weakref = edir->weakref != NULL ? edir->weakref : edir;
4814 edir->weakref = add;
4815 }
4816 add = next;
4817 } while (add != NULL && add != eind);
4818 return;
4819 }
4820
4821 /* Copy over any dynamic relocs we may have on the indirect sym. */
4822 if (eind->dyn_relocs != NULL)
4823 {
4824 if (edir->dyn_relocs != NULL)
4825 {
4826 struct elf_dyn_relocs **pp;
4827 struct elf_dyn_relocs *p;
4828
4829 /* Add reloc counts against the indirect sym to the direct sym
4830 list. Merge any entries against the same section. */
4831 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
4832 {
4833 struct elf_dyn_relocs *q;
4834
4835 for (q = edir->dyn_relocs; q != NULL; q = q->next)
4836 if (q->sec == p->sec)
4837 {
4838 q->pc_count += p->pc_count;
4839 q->count += p->count;
4840 *pp = p->next;
4841 break;
4842 }
4843 if (q == NULL)
4844 pp = &p->next;
4845 }
4846 *pp = edir->dyn_relocs;
4847 }
4848
4849 edir->dyn_relocs = eind->dyn_relocs;
4850 eind->dyn_relocs = NULL;
4851 }
4852
4853 /* Copy over got entries that we may have already seen to the
4854 symbol which just became indirect. */
4855 if (eind->elf.got.glist != NULL)
4856 {
4857 if (edir->elf.got.glist != NULL)
4858 {
4859 struct got_entry **entp;
4860 struct got_entry *ent;
4861
4862 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
4863 {
4864 struct got_entry *dent;
4865
4866 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
4867 if (dent->addend == ent->addend
4868 && dent->owner == ent->owner
4869 && dent->tls_type == ent->tls_type)
4870 {
4871 dent->got.refcount += ent->got.refcount;
4872 *entp = ent->next;
4873 break;
4874 }
4875 if (dent == NULL)
4876 entp = &ent->next;
4877 }
4878 *entp = edir->elf.got.glist;
4879 }
4880
4881 edir->elf.got.glist = eind->elf.got.glist;
4882 eind->elf.got.glist = NULL;
4883 }
4884
4885 /* And plt entries. */
4886 move_plt_plist (eind, edir);
4887
4888 if (eind->elf.dynindx != -1)
4889 {
4890 if (edir->elf.dynindx != -1)
4891 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4892 edir->elf.dynstr_index);
4893 edir->elf.dynindx = eind->elf.dynindx;
4894 edir->elf.dynstr_index = eind->elf.dynstr_index;
4895 eind->elf.dynindx = -1;
4896 eind->elf.dynstr_index = 0;
4897 }
4898 }
4899
4900 /* Find the function descriptor hash entry from the given function code
4901 hash entry FH. Link the entries via their OH fields. */
4902
4903 static struct ppc_link_hash_entry *
4904 lookup_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
4905 {
4906 struct ppc_link_hash_entry *fdh = fh->oh;
4907
4908 if (fdh == NULL)
4909 {
4910 const char *fd_name = fh->elf.root.root.string + 1;
4911
4912 fdh = (struct ppc_link_hash_entry *)
4913 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
4914 if (fdh == NULL)
4915 return fdh;
4916
4917 fdh->is_func_descriptor = 1;
4918 fdh->oh = fh;
4919 fh->is_func = 1;
4920 fh->oh = fdh;
4921 }
4922
4923 fdh = ppc_follow_link (fdh);
4924 fdh->is_func_descriptor = 1;
4925 fdh->oh = fh;
4926 return fdh;
4927 }
4928
4929 /* Make a fake function descriptor sym for the undefined code sym FH. */
4930
4931 static struct ppc_link_hash_entry *
4932 make_fdh (struct bfd_link_info *info,
4933 struct ppc_link_hash_entry *fh)
4934 {
4935 bfd *abfd = fh->elf.root.u.undef.abfd;
4936 struct bfd_link_hash_entry *bh = NULL;
4937 struct ppc_link_hash_entry *fdh;
4938 flagword flags = (fh->elf.root.type == bfd_link_hash_undefweak
4939 ? BSF_WEAK
4940 : BSF_GLOBAL);
4941
4942 if (!_bfd_generic_link_add_one_symbol (info, abfd,
4943 fh->elf.root.root.string + 1,
4944 flags, bfd_und_section_ptr, 0,
4945 NULL, FALSE, FALSE, &bh))
4946 return NULL;
4947
4948 fdh = (struct ppc_link_hash_entry *) bh;
4949 fdh->elf.non_elf = 0;
4950 fdh->fake = 1;
4951 fdh->is_func_descriptor = 1;
4952 fdh->oh = fh;
4953 fh->is_func = 1;
4954 fh->oh = fdh;
4955 return fdh;
4956 }
4957
4958 /* Fix function descriptor symbols defined in .opd sections to be
4959 function type. */
4960
4961 static bfd_boolean
4962 ppc64_elf_add_symbol_hook (bfd *ibfd,
4963 struct bfd_link_info *info,
4964 Elf_Internal_Sym *isym,
4965 const char **name,
4966 flagword *flags ATTRIBUTE_UNUSED,
4967 asection **sec,
4968 bfd_vma *value)
4969 {
4970 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC
4971 && (ibfd->flags & DYNAMIC) == 0
4972 && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour)
4973 elf_tdata (info->output_bfd)->has_gnu_symbols |= elf_gnu_symbol_ifunc;
4974
4975 if (*sec != NULL
4976 && strcmp ((*sec)->name, ".opd") == 0)
4977 {
4978 asection *code_sec;
4979
4980 if (!(ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC
4981 || ELF_ST_TYPE (isym->st_info) == STT_FUNC))
4982 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
4983
4984 /* If the symbol is a function defined in .opd, and the function
4985 code is in a discarded group, let it appear to be undefined. */
4986 if (!bfd_link_relocatable (info)
4987 && (*sec)->reloc_count != 0
4988 && opd_entry_value (*sec, *value, &code_sec, NULL,
4989 FALSE) != (bfd_vma) -1
4990 && discarded_section (code_sec))
4991 {
4992 *sec = bfd_und_section_ptr;
4993 isym->st_shndx = SHN_UNDEF;
4994 }
4995 }
4996 else if (*sec != NULL
4997 && strcmp ((*sec)->name, ".toc") == 0
4998 && ELF_ST_TYPE (isym->st_info) == STT_OBJECT)
4999 {
5000 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5001 if (htab != NULL)
5002 htab->params->object_in_toc = 1;
5003 }
5004
5005 if ((STO_PPC64_LOCAL_MASK & isym->st_other) != 0)
5006 {
5007 if (abiversion (ibfd) == 0)
5008 set_abiversion (ibfd, 2);
5009 else if (abiversion (ibfd) == 1)
5010 {
5011 info->callbacks->einfo (_("%P: symbol '%s' has invalid st_other"
5012 " for ABI version 1\n"), name);
5013 bfd_set_error (bfd_error_bad_value);
5014 return FALSE;
5015 }
5016 }
5017
5018 return TRUE;
5019 }
5020
5021 /* Merge non-visibility st_other attributes: local entry point. */
5022
5023 static void
5024 ppc64_elf_merge_symbol_attribute (struct elf_link_hash_entry *h,
5025 const Elf_Internal_Sym *isym,
5026 bfd_boolean definition,
5027 bfd_boolean dynamic)
5028 {
5029 if (definition && (!dynamic || !h->def_regular))
5030 h->other = ((isym->st_other & ~ELF_ST_VISIBILITY (-1))
5031 | ELF_ST_VISIBILITY (h->other));
5032 }
5033
5034 /* Hook called on merging a symbol. We use this to clear "fake" since
5035 we now have a real symbol. */
5036
5037 static bfd_boolean
5038 ppc64_elf_merge_symbol (struct elf_link_hash_entry *h,
5039 const Elf_Internal_Sym *isym,
5040 asection **psec ATTRIBUTE_UNUSED,
5041 bfd_boolean newdef ATTRIBUTE_UNUSED,
5042 bfd_boolean olddef ATTRIBUTE_UNUSED,
5043 bfd *oldbfd ATTRIBUTE_UNUSED,
5044 const asection *oldsec ATTRIBUTE_UNUSED)
5045 {
5046 ((struct ppc_link_hash_entry *) h)->fake = 0;
5047 if ((STO_PPC64_LOCAL_MASK & isym->st_other) != 0)
5048 ((struct ppc_link_hash_entry *) h)->non_zero_localentry = 1;
5049 return TRUE;
5050 }
5051
5052 /* This function makes an old ABI object reference to ".bar" cause the
5053 inclusion of a new ABI object archive that defines "bar".
5054 NAME is a symbol defined in an archive. Return a symbol in the hash
5055 table that might be satisfied by the archive symbols. */
5056
5057 static struct elf_link_hash_entry *
5058 ppc64_elf_archive_symbol_lookup (bfd *abfd,
5059 struct bfd_link_info *info,
5060 const char *name)
5061 {
5062 struct elf_link_hash_entry *h;
5063 char *dot_name;
5064 size_t len;
5065
5066 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
5067 if (h != NULL
5068 /* Don't return this sym if it is a fake function descriptor
5069 created by add_symbol_adjust. */
5070 && !((struct ppc_link_hash_entry *) h)->fake)
5071 return h;
5072
5073 if (name[0] == '.')
5074 return h;
5075
5076 len = strlen (name);
5077 dot_name = bfd_alloc (abfd, len + 2);
5078 if (dot_name == NULL)
5079 return (struct elf_link_hash_entry *) 0 - 1;
5080 dot_name[0] = '.';
5081 memcpy (dot_name + 1, name, len + 1);
5082 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
5083 bfd_release (abfd, dot_name);
5084 return h;
5085 }
5086
5087 /* This function satisfies all old ABI object references to ".bar" if a
5088 new ABI object defines "bar". Well, at least, undefined dot symbols
5089 are made weak. This stops later archive searches from including an
5090 object if we already have a function descriptor definition. It also
5091 prevents the linker complaining about undefined symbols.
5092 We also check and correct mismatched symbol visibility here. The
5093 most restrictive visibility of the function descriptor and the
5094 function entry symbol is used. */
5095
5096 static bfd_boolean
5097 add_symbol_adjust (struct ppc_link_hash_entry *eh, struct bfd_link_info *info)
5098 {
5099 struct ppc_link_hash_table *htab;
5100 struct ppc_link_hash_entry *fdh;
5101
5102 if (eh->elf.root.type == bfd_link_hash_warning)
5103 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
5104
5105 if (eh->elf.root.type == bfd_link_hash_indirect)
5106 return TRUE;
5107
5108 if (eh->elf.root.root.string[0] != '.')
5109 abort ();
5110
5111 htab = ppc_hash_table (info);
5112 if (htab == NULL)
5113 return FALSE;
5114
5115 fdh = lookup_fdh (eh, htab);
5116 if (fdh == NULL
5117 && !bfd_link_relocatable (info)
5118 && (eh->elf.root.type == bfd_link_hash_undefined
5119 || eh->elf.root.type == bfd_link_hash_undefweak)
5120 && eh->elf.ref_regular)
5121 {
5122 /* Make an undefined function descriptor sym, in order to
5123 pull in an --as-needed shared lib. Archives are handled
5124 elsewhere. */
5125 fdh = make_fdh (info, eh);
5126 if (fdh == NULL)
5127 return FALSE;
5128 }
5129
5130 if (fdh != NULL)
5131 {
5132 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
5133 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
5134
5135 /* Make both descriptor and entry symbol have the most
5136 constraining visibility of either symbol. */
5137 if (entry_vis < descr_vis)
5138 fdh->elf.other += entry_vis - descr_vis;
5139 else if (entry_vis > descr_vis)
5140 eh->elf.other += descr_vis - entry_vis;
5141
5142 /* Propagate reference flags from entry symbol to function
5143 descriptor symbol. */
5144 fdh->elf.root.non_ir_ref_regular |= eh->elf.root.non_ir_ref_regular;
5145 fdh->elf.root.non_ir_ref_dynamic |= eh->elf.root.non_ir_ref_dynamic;
5146 fdh->elf.ref_regular |= eh->elf.ref_regular;
5147 fdh->elf.ref_regular_nonweak |= eh->elf.ref_regular_nonweak;
5148
5149 if (!fdh->elf.forced_local
5150 && fdh->elf.dynindx == -1
5151 && fdh->elf.versioned != versioned_hidden
5152 && (bfd_link_dll (info)
5153 || fdh->elf.def_dynamic
5154 || fdh->elf.ref_dynamic)
5155 && (eh->elf.ref_regular
5156 || eh->elf.def_regular))
5157 {
5158 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
5159 return FALSE;
5160 }
5161 }
5162
5163 return TRUE;
5164 }
5165
5166 /* Set up opd section info and abiversion for IBFD, and process list
5167 of dot-symbols we made in link_hash_newfunc. */
5168
5169 static bfd_boolean
5170 ppc64_elf_before_check_relocs (bfd *ibfd, struct bfd_link_info *info)
5171 {
5172 struct ppc_link_hash_table *htab;
5173 struct ppc_link_hash_entry **p, *eh;
5174 asection *opd = bfd_get_section_by_name (ibfd, ".opd");
5175
5176 if (opd != NULL && opd->size != 0)
5177 {
5178 BFD_ASSERT (ppc64_elf_section_data (opd)->sec_type == sec_normal);
5179 ppc64_elf_section_data (opd)->sec_type = sec_opd;
5180
5181 if (abiversion (ibfd) == 0)
5182 set_abiversion (ibfd, 1);
5183 else if (abiversion (ibfd) >= 2)
5184 {
5185 /* xgettext:c-format */
5186 info->callbacks->einfo (_("%P: %B .opd not allowed in ABI"
5187 " version %d\n"),
5188 ibfd, abiversion (ibfd));
5189 bfd_set_error (bfd_error_bad_value);
5190 return FALSE;
5191 }
5192 }
5193
5194 if (is_ppc64_elf (info->output_bfd))
5195 {
5196 /* For input files without an explicit abiversion in e_flags
5197 we should have flagged any with symbol st_other bits set
5198 as ELFv1 and above flagged those with .opd as ELFv2.
5199 Set the output abiversion if not yet set, and for any input
5200 still ambiguous, take its abiversion from the output.
5201 Differences in ABI are reported later. */
5202 if (abiversion (info->output_bfd) == 0)
5203 set_abiversion (info->output_bfd, abiversion (ibfd));
5204 else if (abiversion (ibfd) == 0)
5205 set_abiversion (ibfd, abiversion (info->output_bfd));
5206 }
5207
5208 htab = ppc_hash_table (info);
5209 if (htab == NULL)
5210 return TRUE;
5211
5212 if (opd != NULL && opd->size != 0
5213 && (ibfd->flags & DYNAMIC) == 0
5214 && (opd->flags & SEC_RELOC) != 0
5215 && opd->reloc_count != 0
5216 && !bfd_is_abs_section (opd->output_section)
5217 && info->gc_sections)
5218 {
5219 /* Garbage collection needs some extra help with .opd sections.
5220 We don't want to necessarily keep everything referenced by
5221 relocs in .opd, as that would keep all functions. Instead,
5222 if we reference an .opd symbol (a function descriptor), we
5223 want to keep the function code symbol's section. This is
5224 easy for global symbols, but for local syms we need to keep
5225 information about the associated function section. */
5226 bfd_size_type amt;
5227 asection **opd_sym_map;
5228 Elf_Internal_Shdr *symtab_hdr;
5229 Elf_Internal_Rela *relocs, *rel_end, *rel;
5230
5231 amt = OPD_NDX (opd->size) * sizeof (*opd_sym_map);
5232 opd_sym_map = bfd_zalloc (ibfd, amt);
5233 if (opd_sym_map == NULL)
5234 return FALSE;
5235 ppc64_elf_section_data (opd)->u.opd.func_sec = opd_sym_map;
5236 relocs = _bfd_elf_link_read_relocs (ibfd, opd, NULL, NULL,
5237 info->keep_memory);
5238 if (relocs == NULL)
5239 return FALSE;
5240 symtab_hdr = &elf_symtab_hdr (ibfd);
5241 rel_end = relocs + opd->reloc_count - 1;
5242 for (rel = relocs; rel < rel_end; rel++)
5243 {
5244 enum elf_ppc64_reloc_type r_type = ELF64_R_TYPE (rel->r_info);
5245 unsigned long r_symndx = ELF64_R_SYM (rel->r_info);
5246
5247 if (r_type == R_PPC64_ADDR64
5248 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC
5249 && r_symndx < symtab_hdr->sh_info)
5250 {
5251 Elf_Internal_Sym *isym;
5252 asection *s;
5253
5254 isym = bfd_sym_from_r_symndx (&htab->sym_cache, ibfd, r_symndx);
5255 if (isym == NULL)
5256 {
5257 if (elf_section_data (opd)->relocs != relocs)
5258 free (relocs);
5259 return FALSE;
5260 }
5261
5262 s = bfd_section_from_elf_index (ibfd, isym->st_shndx);
5263 if (s != NULL && s != opd)
5264 opd_sym_map[OPD_NDX (rel->r_offset)] = s;
5265 }
5266 }
5267 if (elf_section_data (opd)->relocs != relocs)
5268 free (relocs);
5269 }
5270
5271 p = &htab->dot_syms;
5272 while ((eh = *p) != NULL)
5273 {
5274 *p = NULL;
5275 if (&eh->elf == htab->elf.hgot)
5276 ;
5277 else if (htab->elf.hgot == NULL
5278 && strcmp (eh->elf.root.root.string, ".TOC.") == 0)
5279 htab->elf.hgot = &eh->elf;
5280 else if (abiversion (ibfd) <= 1)
5281 {
5282 htab->need_func_desc_adj = 1;
5283 if (!add_symbol_adjust (eh, info))
5284 return FALSE;
5285 }
5286 p = &eh->u.next_dot_sym;
5287 }
5288 return TRUE;
5289 }
5290
5291 /* Undo hash table changes when an --as-needed input file is determined
5292 not to be needed. */
5293
5294 static bfd_boolean
5295 ppc64_elf_notice_as_needed (bfd *ibfd,
5296 struct bfd_link_info *info,
5297 enum notice_asneeded_action act)
5298 {
5299 if (act == notice_not_needed)
5300 {
5301 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5302
5303 if (htab == NULL)
5304 return FALSE;
5305
5306 htab->dot_syms = NULL;
5307 }
5308 return _bfd_elf_notice_as_needed (ibfd, info, act);
5309 }
5310
5311 /* If --just-symbols against a final linked binary, then assume we need
5312 toc adjusting stubs when calling functions defined there. */
5313
5314 static void
5315 ppc64_elf_link_just_syms (asection *sec, struct bfd_link_info *info)
5316 {
5317 if ((sec->flags & SEC_CODE) != 0
5318 && (sec->owner->flags & (EXEC_P | DYNAMIC)) != 0
5319 && is_ppc64_elf (sec->owner))
5320 {
5321 if (abiversion (sec->owner) >= 2
5322 || bfd_get_section_by_name (sec->owner, ".opd") != NULL)
5323 sec->has_toc_reloc = 1;
5324 }
5325 _bfd_elf_link_just_syms (sec, info);
5326 }
5327
5328 static struct plt_entry **
5329 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
5330 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
5331 {
5332 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
5333 struct plt_entry **local_plt;
5334 unsigned char *local_got_tls_masks;
5335
5336 if (local_got_ents == NULL)
5337 {
5338 bfd_size_type size = symtab_hdr->sh_info;
5339
5340 size *= (sizeof (*local_got_ents)
5341 + sizeof (*local_plt)
5342 + sizeof (*local_got_tls_masks));
5343 local_got_ents = bfd_zalloc (abfd, size);
5344 if (local_got_ents == NULL)
5345 return NULL;
5346 elf_local_got_ents (abfd) = local_got_ents;
5347 }
5348
5349 if ((tls_type & (PLT_IFUNC | TLS_EXPLICIT)) == 0)
5350 {
5351 struct got_entry *ent;
5352
5353 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
5354 if (ent->addend == r_addend
5355 && ent->owner == abfd
5356 && ent->tls_type == tls_type)
5357 break;
5358 if (ent == NULL)
5359 {
5360 bfd_size_type amt = sizeof (*ent);
5361 ent = bfd_alloc (abfd, amt);
5362 if (ent == NULL)
5363 return FALSE;
5364 ent->next = local_got_ents[r_symndx];
5365 ent->addend = r_addend;
5366 ent->owner = abfd;
5367 ent->tls_type = tls_type;
5368 ent->is_indirect = FALSE;
5369 ent->got.refcount = 0;
5370 local_got_ents[r_symndx] = ent;
5371 }
5372 ent->got.refcount += 1;
5373 }
5374
5375 local_plt = (struct plt_entry **) (local_got_ents + symtab_hdr->sh_info);
5376 local_got_tls_masks = (unsigned char *) (local_plt + symtab_hdr->sh_info);
5377 local_got_tls_masks[r_symndx] |= tls_type;
5378
5379 return local_plt + r_symndx;
5380 }
5381
5382 static bfd_boolean
5383 update_plt_info (bfd *abfd, struct plt_entry **plist, bfd_vma addend)
5384 {
5385 struct plt_entry *ent;
5386
5387 for (ent = *plist; ent != NULL; ent = ent->next)
5388 if (ent->addend == addend)
5389 break;
5390 if (ent == NULL)
5391 {
5392 bfd_size_type amt = sizeof (*ent);
5393 ent = bfd_alloc (abfd, amt);
5394 if (ent == NULL)
5395 return FALSE;
5396 ent->next = *plist;
5397 ent->addend = addend;
5398 ent->plt.refcount = 0;
5399 *plist = ent;
5400 }
5401 ent->plt.refcount += 1;
5402 return TRUE;
5403 }
5404
5405 static bfd_boolean
5406 is_branch_reloc (enum elf_ppc64_reloc_type r_type)
5407 {
5408 return (r_type == R_PPC64_REL24
5409 || r_type == R_PPC64_REL14
5410 || r_type == R_PPC64_REL14_BRTAKEN
5411 || r_type == R_PPC64_REL14_BRNTAKEN
5412 || r_type == R_PPC64_ADDR24
5413 || r_type == R_PPC64_ADDR14
5414 || r_type == R_PPC64_ADDR14_BRTAKEN
5415 || r_type == R_PPC64_ADDR14_BRNTAKEN);
5416 }
5417
5418 /* Look through the relocs for a section during the first phase, and
5419 calculate needed space in the global offset table, procedure
5420 linkage table, and dynamic reloc sections. */
5421
5422 static bfd_boolean
5423 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
5424 asection *sec, const Elf_Internal_Rela *relocs)
5425 {
5426 struct ppc_link_hash_table *htab;
5427 Elf_Internal_Shdr *symtab_hdr;
5428 struct elf_link_hash_entry **sym_hashes;
5429 const Elf_Internal_Rela *rel;
5430 const Elf_Internal_Rela *rel_end;
5431 asection *sreloc;
5432 struct elf_link_hash_entry *tga, *dottga;
5433 bfd_boolean is_opd;
5434
5435 if (bfd_link_relocatable (info))
5436 return TRUE;
5437
5438 /* Don't do anything special with non-loaded, non-alloced sections.
5439 In particular, any relocs in such sections should not affect GOT
5440 and PLT reference counting (ie. we don't allow them to create GOT
5441 or PLT entries), there's no possibility or desire to optimize TLS
5442 relocs, and there's not much point in propagating relocs to shared
5443 libs that the dynamic linker won't relocate. */
5444 if ((sec->flags & SEC_ALLOC) == 0)
5445 return TRUE;
5446
5447 BFD_ASSERT (is_ppc64_elf (abfd));
5448
5449 htab = ppc_hash_table (info);
5450 if (htab == NULL)
5451 return FALSE;
5452
5453 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
5454 FALSE, FALSE, TRUE);
5455 dottga = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
5456 FALSE, FALSE, TRUE);
5457 symtab_hdr = &elf_symtab_hdr (abfd);
5458 sym_hashes = elf_sym_hashes (abfd);
5459 sreloc = NULL;
5460 is_opd = ppc64_elf_section_data (sec)->sec_type == sec_opd;
5461 rel_end = relocs + sec->reloc_count;
5462 for (rel = relocs; rel < rel_end; rel++)
5463 {
5464 unsigned long r_symndx;
5465 struct elf_link_hash_entry *h;
5466 enum elf_ppc64_reloc_type r_type;
5467 int tls_type;
5468 struct _ppc64_elf_section_data *ppc64_sec;
5469 struct plt_entry **ifunc, **plt_list;
5470
5471 r_symndx = ELF64_R_SYM (rel->r_info);
5472 if (r_symndx < symtab_hdr->sh_info)
5473 h = NULL;
5474 else
5475 {
5476 struct ppc_link_hash_entry *eh;
5477
5478 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5479 h = elf_follow_link (h);
5480 eh = (struct ppc_link_hash_entry *) h;
5481
5482 /* PR15323, ref flags aren't set for references in the same
5483 object. */
5484 h->root.non_ir_ref_regular = 1;
5485 if (eh->is_func && eh->oh != NULL)
5486 eh->oh->elf.root.non_ir_ref_regular = 1;
5487
5488 if (h == htab->elf.hgot)
5489 sec->has_toc_reloc = 1;
5490 }
5491
5492 tls_type = 0;
5493 ifunc = NULL;
5494 if (h != NULL)
5495 {
5496 if (h->type == STT_GNU_IFUNC)
5497 {
5498 h->needs_plt = 1;
5499 ifunc = &h->plt.plist;
5500 }
5501 }
5502 else
5503 {
5504 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5505 abfd, r_symndx);
5506 if (isym == NULL)
5507 return FALSE;
5508
5509 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
5510 {
5511 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
5512 rel->r_addend, PLT_IFUNC);
5513 if (ifunc == NULL)
5514 return FALSE;
5515 }
5516 }
5517
5518 r_type = ELF64_R_TYPE (rel->r_info);
5519 switch (r_type)
5520 {
5521 case R_PPC64_TLSGD:
5522 case R_PPC64_TLSLD:
5523 /* These special tls relocs tie a call to __tls_get_addr with
5524 its parameter symbol. */
5525 break;
5526
5527 case R_PPC64_GOT_TLSLD16:
5528 case R_PPC64_GOT_TLSLD16_LO:
5529 case R_PPC64_GOT_TLSLD16_HI:
5530 case R_PPC64_GOT_TLSLD16_HA:
5531 tls_type = TLS_TLS | TLS_LD;
5532 goto dogottls;
5533
5534 case R_PPC64_GOT_TLSGD16:
5535 case R_PPC64_GOT_TLSGD16_LO:
5536 case R_PPC64_GOT_TLSGD16_HI:
5537 case R_PPC64_GOT_TLSGD16_HA:
5538 tls_type = TLS_TLS | TLS_GD;
5539 goto dogottls;
5540
5541 case R_PPC64_GOT_TPREL16_DS:
5542 case R_PPC64_GOT_TPREL16_LO_DS:
5543 case R_PPC64_GOT_TPREL16_HI:
5544 case R_PPC64_GOT_TPREL16_HA:
5545 if (bfd_link_dll (info))
5546 info->flags |= DF_STATIC_TLS;
5547 tls_type = TLS_TLS | TLS_TPREL;
5548 goto dogottls;
5549
5550 case R_PPC64_GOT_DTPREL16_DS:
5551 case R_PPC64_GOT_DTPREL16_LO_DS:
5552 case R_PPC64_GOT_DTPREL16_HI:
5553 case R_PPC64_GOT_DTPREL16_HA:
5554 tls_type = TLS_TLS | TLS_DTPREL;
5555 dogottls:
5556 sec->has_tls_reloc = 1;
5557 /* Fall through */
5558
5559 case R_PPC64_GOT16:
5560 case R_PPC64_GOT16_DS:
5561 case R_PPC64_GOT16_HA:
5562 case R_PPC64_GOT16_HI:
5563 case R_PPC64_GOT16_LO:
5564 case R_PPC64_GOT16_LO_DS:
5565 /* This symbol requires a global offset table entry. */
5566 sec->has_toc_reloc = 1;
5567 if (r_type == R_PPC64_GOT_TLSLD16
5568 || r_type == R_PPC64_GOT_TLSGD16
5569 || r_type == R_PPC64_GOT_TPREL16_DS
5570 || r_type == R_PPC64_GOT_DTPREL16_DS
5571 || r_type == R_PPC64_GOT16
5572 || r_type == R_PPC64_GOT16_DS)
5573 {
5574 htab->do_multi_toc = 1;
5575 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5576 }
5577
5578 if (ppc64_elf_tdata (abfd)->got == NULL
5579 && !create_got_section (abfd, info))
5580 return FALSE;
5581
5582 if (h != NULL)
5583 {
5584 struct ppc_link_hash_entry *eh;
5585 struct got_entry *ent;
5586
5587 eh = (struct ppc_link_hash_entry *) h;
5588 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
5589 if (ent->addend == rel->r_addend
5590 && ent->owner == abfd
5591 && ent->tls_type == tls_type)
5592 break;
5593 if (ent == NULL)
5594 {
5595 bfd_size_type amt = sizeof (*ent);
5596 ent = bfd_alloc (abfd, amt);
5597 if (ent == NULL)
5598 return FALSE;
5599 ent->next = eh->elf.got.glist;
5600 ent->addend = rel->r_addend;
5601 ent->owner = abfd;
5602 ent->tls_type = tls_type;
5603 ent->is_indirect = FALSE;
5604 ent->got.refcount = 0;
5605 eh->elf.got.glist = ent;
5606 }
5607 ent->got.refcount += 1;
5608 eh->tls_mask |= tls_type;
5609 }
5610 else
5611 /* This is a global offset table entry for a local symbol. */
5612 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5613 rel->r_addend, tls_type))
5614 return FALSE;
5615
5616 /* We may also need a plt entry if the symbol turns out to be
5617 an ifunc. */
5618 if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1)
5619 {
5620 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5621 return FALSE;
5622 }
5623 break;
5624
5625 case R_PPC64_PLT16_HA:
5626 case R_PPC64_PLT16_HI:
5627 case R_PPC64_PLT16_LO:
5628 case R_PPC64_PLT32:
5629 case R_PPC64_PLT64:
5630 /* This symbol requires a procedure linkage table entry. */
5631 plt_list = ifunc;
5632 if (h != NULL)
5633 {
5634 h->needs_plt = 1;
5635 if (h->root.root.string[0] == '.'
5636 && h->root.root.string[1] != '\0')
5637 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5638 plt_list = &h->plt.plist;
5639 }
5640 if (plt_list == NULL)
5641 {
5642 /* It does not make sense to have a procedure linkage
5643 table entry for a non-ifunc local symbol. */
5644 info->callbacks->einfo
5645 /* xgettext:c-format */
5646 (_("%H: %s reloc against local symbol\n"),
5647 abfd, sec, rel->r_offset,
5648 ppc64_elf_howto_table[r_type]->name);
5649 bfd_set_error (bfd_error_bad_value);
5650 return FALSE;
5651 }
5652 if (!update_plt_info (abfd, plt_list, rel->r_addend))
5653 return FALSE;
5654 break;
5655
5656 /* The following relocations don't need to propagate the
5657 relocation if linking a shared object since they are
5658 section relative. */
5659 case R_PPC64_SECTOFF:
5660 case R_PPC64_SECTOFF_LO:
5661 case R_PPC64_SECTOFF_HI:
5662 case R_PPC64_SECTOFF_HA:
5663 case R_PPC64_SECTOFF_DS:
5664 case R_PPC64_SECTOFF_LO_DS:
5665 case R_PPC64_DTPREL16:
5666 case R_PPC64_DTPREL16_LO:
5667 case R_PPC64_DTPREL16_HI:
5668 case R_PPC64_DTPREL16_HA:
5669 case R_PPC64_DTPREL16_DS:
5670 case R_PPC64_DTPREL16_LO_DS:
5671 case R_PPC64_DTPREL16_HIGH:
5672 case R_PPC64_DTPREL16_HIGHA:
5673 case R_PPC64_DTPREL16_HIGHER:
5674 case R_PPC64_DTPREL16_HIGHERA:
5675 case R_PPC64_DTPREL16_HIGHEST:
5676 case R_PPC64_DTPREL16_HIGHESTA:
5677 break;
5678
5679 /* Nor do these. */
5680 case R_PPC64_REL16:
5681 case R_PPC64_REL16_LO:
5682 case R_PPC64_REL16_HI:
5683 case R_PPC64_REL16_HA:
5684 case R_PPC64_REL16DX_HA:
5685 break;
5686
5687 /* Not supported as a dynamic relocation. */
5688 case R_PPC64_ADDR64_LOCAL:
5689 if (bfd_link_pic (info))
5690 {
5691 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
5692 ppc_howto_init ();
5693 /* xgettext:c-format */
5694 info->callbacks->einfo (_("%H: %s reloc unsupported "
5695 "in shared libraries and PIEs.\n"),
5696 abfd, sec, rel->r_offset,
5697 ppc64_elf_howto_table[r_type]->name);
5698 bfd_set_error (bfd_error_bad_value);
5699 return FALSE;
5700 }
5701 break;
5702
5703 case R_PPC64_TOC16:
5704 case R_PPC64_TOC16_DS:
5705 htab->do_multi_toc = 1;
5706 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5707 /* Fall through. */
5708 case R_PPC64_TOC16_LO:
5709 case R_PPC64_TOC16_HI:
5710 case R_PPC64_TOC16_HA:
5711 case R_PPC64_TOC16_LO_DS:
5712 sec->has_toc_reloc = 1;
5713 break;
5714
5715 /* Marker reloc. */
5716 case R_PPC64_ENTRY:
5717 break;
5718
5719 /* This relocation describes the C++ object vtable hierarchy.
5720 Reconstruct it for later use during GC. */
5721 case R_PPC64_GNU_VTINHERIT:
5722 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
5723 return FALSE;
5724 break;
5725
5726 /* This relocation describes which C++ vtable entries are actually
5727 used. Record for later use during GC. */
5728 case R_PPC64_GNU_VTENTRY:
5729 BFD_ASSERT (h != NULL);
5730 if (h != NULL
5731 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
5732 return FALSE;
5733 break;
5734
5735 case R_PPC64_REL14:
5736 case R_PPC64_REL14_BRTAKEN:
5737 case R_PPC64_REL14_BRNTAKEN:
5738 {
5739 asection *dest = NULL;
5740
5741 /* Heuristic: If jumping outside our section, chances are
5742 we are going to need a stub. */
5743 if (h != NULL)
5744 {
5745 /* If the sym is weak it may be overridden later, so
5746 don't assume we know where a weak sym lives. */
5747 if (h->root.type == bfd_link_hash_defined)
5748 dest = h->root.u.def.section;
5749 }
5750 else
5751 {
5752 Elf_Internal_Sym *isym;
5753
5754 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5755 abfd, r_symndx);
5756 if (isym == NULL)
5757 return FALSE;
5758
5759 dest = bfd_section_from_elf_index (abfd, isym->st_shndx);
5760 }
5761
5762 if (dest != sec)
5763 ppc64_elf_section_data (sec)->has_14bit_branch = 1;
5764 }
5765 /* Fall through. */
5766
5767 case R_PPC64_REL24:
5768 plt_list = ifunc;
5769 if (h != NULL)
5770 {
5771 h->needs_plt = 1;
5772 if (h->root.root.string[0] == '.'
5773 && h->root.root.string[1] != '\0')
5774 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5775
5776 if (h == tga || h == dottga)
5777 {
5778 sec->has_tls_reloc = 1;
5779 if (rel != relocs
5780 && (ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSGD
5781 || ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSLD))
5782 /* We have a new-style __tls_get_addr call with
5783 a marker reloc. */
5784 ;
5785 else
5786 /* Mark this section as having an old-style call. */
5787 sec->has_tls_get_addr_call = 1;
5788 }
5789 plt_list = &h->plt.plist;
5790 }
5791
5792 /* We may need a .plt entry if the function this reloc
5793 refers to is in a shared lib. */
5794 if (plt_list
5795 && !update_plt_info (abfd, plt_list, rel->r_addend))
5796 return FALSE;
5797 break;
5798
5799 case R_PPC64_ADDR14:
5800 case R_PPC64_ADDR14_BRNTAKEN:
5801 case R_PPC64_ADDR14_BRTAKEN:
5802 case R_PPC64_ADDR24:
5803 goto dodyn;
5804
5805 case R_PPC64_TPREL64:
5806 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
5807 if (bfd_link_dll (info))
5808 info->flags |= DF_STATIC_TLS;
5809 goto dotlstoc;
5810
5811 case R_PPC64_DTPMOD64:
5812 if (rel + 1 < rel_end
5813 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
5814 && rel[1].r_offset == rel->r_offset + 8)
5815 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
5816 else
5817 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
5818 goto dotlstoc;
5819
5820 case R_PPC64_DTPREL64:
5821 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
5822 if (rel != relocs
5823 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
5824 && rel[-1].r_offset == rel->r_offset - 8)
5825 /* This is the second reloc of a dtpmod, dtprel pair.
5826 Don't mark with TLS_DTPREL. */
5827 goto dodyn;
5828
5829 dotlstoc:
5830 sec->has_tls_reloc = 1;
5831 if (h != NULL)
5832 {
5833 struct ppc_link_hash_entry *eh;
5834 eh = (struct ppc_link_hash_entry *) h;
5835 eh->tls_mask |= tls_type;
5836 }
5837 else
5838 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5839 rel->r_addend, tls_type))
5840 return FALSE;
5841
5842 ppc64_sec = ppc64_elf_section_data (sec);
5843 if (ppc64_sec->sec_type != sec_toc)
5844 {
5845 bfd_size_type amt;
5846
5847 /* One extra to simplify get_tls_mask. */
5848 amt = sec->size * sizeof (unsigned) / 8 + sizeof (unsigned);
5849 ppc64_sec->u.toc.symndx = bfd_zalloc (abfd, amt);
5850 if (ppc64_sec->u.toc.symndx == NULL)
5851 return FALSE;
5852 amt = sec->size * sizeof (bfd_vma) / 8;
5853 ppc64_sec->u.toc.add = bfd_zalloc (abfd, amt);
5854 if (ppc64_sec->u.toc.add == NULL)
5855 return FALSE;
5856 BFD_ASSERT (ppc64_sec->sec_type == sec_normal);
5857 ppc64_sec->sec_type = sec_toc;
5858 }
5859 BFD_ASSERT (rel->r_offset % 8 == 0);
5860 ppc64_sec->u.toc.symndx[rel->r_offset / 8] = r_symndx;
5861 ppc64_sec->u.toc.add[rel->r_offset / 8] = rel->r_addend;
5862
5863 /* Mark the second slot of a GD or LD entry.
5864 -1 to indicate GD and -2 to indicate LD. */
5865 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
5866 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -1;
5867 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
5868 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -2;
5869 goto dodyn;
5870
5871 case R_PPC64_TPREL16:
5872 case R_PPC64_TPREL16_LO:
5873 case R_PPC64_TPREL16_HI:
5874 case R_PPC64_TPREL16_HA:
5875 case R_PPC64_TPREL16_DS:
5876 case R_PPC64_TPREL16_LO_DS:
5877 case R_PPC64_TPREL16_HIGH:
5878 case R_PPC64_TPREL16_HIGHA:
5879 case R_PPC64_TPREL16_HIGHER:
5880 case R_PPC64_TPREL16_HIGHERA:
5881 case R_PPC64_TPREL16_HIGHEST:
5882 case R_PPC64_TPREL16_HIGHESTA:
5883 if (bfd_link_dll (info))
5884 info->flags |= DF_STATIC_TLS;
5885 goto dodyn;
5886
5887 case R_PPC64_ADDR64:
5888 if (is_opd
5889 && rel + 1 < rel_end
5890 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
5891 {
5892 if (h != NULL)
5893 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5894 }
5895 /* Fall through. */
5896
5897 case R_PPC64_ADDR16:
5898 case R_PPC64_ADDR16_DS:
5899 case R_PPC64_ADDR16_HA:
5900 case R_PPC64_ADDR16_HI:
5901 case R_PPC64_ADDR16_HIGH:
5902 case R_PPC64_ADDR16_HIGHA:
5903 case R_PPC64_ADDR16_HIGHER:
5904 case R_PPC64_ADDR16_HIGHERA:
5905 case R_PPC64_ADDR16_HIGHEST:
5906 case R_PPC64_ADDR16_HIGHESTA:
5907 case R_PPC64_ADDR16_LO:
5908 case R_PPC64_ADDR16_LO_DS:
5909 if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1
5910 && rel->r_addend == 0)
5911 {
5912 /* We may need a .plt entry if this reloc refers to a
5913 function in a shared lib. */
5914 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5915 return FALSE;
5916 h->pointer_equality_needed = 1;
5917 }
5918 /* Fall through. */
5919
5920 case R_PPC64_REL30:
5921 case R_PPC64_REL32:
5922 case R_PPC64_REL64:
5923 case R_PPC64_ADDR32:
5924 case R_PPC64_UADDR16:
5925 case R_PPC64_UADDR32:
5926 case R_PPC64_UADDR64:
5927 case R_PPC64_TOC:
5928 if (h != NULL && !bfd_link_pic (info))
5929 /* We may need a copy reloc. */
5930 h->non_got_ref = 1;
5931
5932 /* Don't propagate .opd relocs. */
5933 if (NO_OPD_RELOCS && is_opd)
5934 break;
5935
5936 /* If we are creating a shared library, and this is a reloc
5937 against a global symbol, or a non PC relative reloc
5938 against a local symbol, then we need to copy the reloc
5939 into the shared library. However, if we are linking with
5940 -Bsymbolic, we do not need to copy a reloc against a
5941 global symbol which is defined in an object we are
5942 including in the link (i.e., DEF_REGULAR is set). At
5943 this point we have not seen all the input files, so it is
5944 possible that DEF_REGULAR is not set now but will be set
5945 later (it is never cleared). In case of a weak definition,
5946 DEF_REGULAR may be cleared later by a strong definition in
5947 a shared library. We account for that possibility below by
5948 storing information in the dyn_relocs field of the hash
5949 table entry. A similar situation occurs when creating
5950 shared libraries and symbol visibility changes render the
5951 symbol local.
5952
5953 If on the other hand, we are creating an executable, we
5954 may need to keep relocations for symbols satisfied by a
5955 dynamic library if we manage to avoid copy relocs for the
5956 symbol. */
5957 dodyn:
5958 if ((bfd_link_pic (info)
5959 && (must_be_dyn_reloc (info, r_type)
5960 || (h != NULL
5961 && (!SYMBOLIC_BIND (info, h)
5962 || h->root.type == bfd_link_hash_defweak
5963 || !h->def_regular))))
5964 || (ELIMINATE_COPY_RELOCS
5965 && !bfd_link_pic (info)
5966 && h != NULL
5967 && (h->root.type == bfd_link_hash_defweak
5968 || !h->def_regular))
5969 || (!bfd_link_pic (info)
5970 && ifunc != NULL))
5971 {
5972 /* We must copy these reloc types into the output file.
5973 Create a reloc section in dynobj and make room for
5974 this reloc. */
5975 if (sreloc == NULL)
5976 {
5977 sreloc = _bfd_elf_make_dynamic_reloc_section
5978 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
5979
5980 if (sreloc == NULL)
5981 return FALSE;
5982 }
5983
5984 /* If this is a global symbol, we count the number of
5985 relocations we need for this symbol. */
5986 if (h != NULL)
5987 {
5988 struct elf_dyn_relocs *p;
5989 struct elf_dyn_relocs **head;
5990
5991 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
5992 p = *head;
5993 if (p == NULL || p->sec != sec)
5994 {
5995 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5996 if (p == NULL)
5997 return FALSE;
5998 p->next = *head;
5999 *head = p;
6000 p->sec = sec;
6001 p->count = 0;
6002 p->pc_count = 0;
6003 }
6004 p->count += 1;
6005 if (!must_be_dyn_reloc (info, r_type))
6006 p->pc_count += 1;
6007 }
6008 else
6009 {
6010 /* Track dynamic relocs needed for local syms too.
6011 We really need local syms available to do this
6012 easily. Oh well. */
6013 struct ppc_dyn_relocs *p;
6014 struct ppc_dyn_relocs **head;
6015 bfd_boolean is_ifunc;
6016 asection *s;
6017 void *vpp;
6018 Elf_Internal_Sym *isym;
6019
6020 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
6021 abfd, r_symndx);
6022 if (isym == NULL)
6023 return FALSE;
6024
6025 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
6026 if (s == NULL)
6027 s = sec;
6028
6029 vpp = &elf_section_data (s)->local_dynrel;
6030 head = (struct ppc_dyn_relocs **) vpp;
6031 is_ifunc = ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC;
6032 p = *head;
6033 if (p != NULL && p->sec == sec && p->ifunc != is_ifunc)
6034 p = p->next;
6035 if (p == NULL || p->sec != sec || p->ifunc != is_ifunc)
6036 {
6037 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
6038 if (p == NULL)
6039 return FALSE;
6040 p->next = *head;
6041 *head = p;
6042 p->sec = sec;
6043 p->ifunc = is_ifunc;
6044 p->count = 0;
6045 }
6046 p->count += 1;
6047 }
6048 }
6049 break;
6050
6051 default:
6052 break;
6053 }
6054 }
6055
6056 return TRUE;
6057 }
6058
6059 /* Merge backend specific data from an object file to the output
6060 object file when linking. */
6061
6062 static bfd_boolean
6063 ppc64_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
6064 {
6065 bfd *obfd = info->output_bfd;
6066 unsigned long iflags, oflags;
6067
6068 if ((ibfd->flags & BFD_LINKER_CREATED) != 0)
6069 return TRUE;
6070
6071 if (!is_ppc64_elf (ibfd) || !is_ppc64_elf (obfd))
6072 return TRUE;
6073
6074 if (!_bfd_generic_verify_endian_match (ibfd, info))
6075 return FALSE;
6076
6077 iflags = elf_elfheader (ibfd)->e_flags;
6078 oflags = elf_elfheader (obfd)->e_flags;
6079
6080 if (iflags & ~EF_PPC64_ABI)
6081 {
6082 _bfd_error_handler
6083 /* xgettext:c-format */
6084 (_("%B uses unknown e_flags 0x%lx"), ibfd, iflags);
6085 bfd_set_error (bfd_error_bad_value);
6086 return FALSE;
6087 }
6088 else if (iflags != oflags && iflags != 0)
6089 {
6090 _bfd_error_handler
6091 /* xgettext:c-format */
6092 (_("%B: ABI version %ld is not compatible with ABI version %ld output"),
6093 ibfd, iflags, oflags);
6094 bfd_set_error (bfd_error_bad_value);
6095 return FALSE;
6096 }
6097
6098 _bfd_elf_ppc_merge_fp_attributes (ibfd, info);
6099
6100 /* Merge Tag_compatibility attributes and any common GNU ones. */
6101 _bfd_elf_merge_object_attributes (ibfd, info);
6102
6103 return TRUE;
6104 }
6105
6106 static bfd_boolean
6107 ppc64_elf_print_private_bfd_data (bfd *abfd, void *ptr)
6108 {
6109 /* Print normal ELF private data. */
6110 _bfd_elf_print_private_bfd_data (abfd, ptr);
6111
6112 if (elf_elfheader (abfd)->e_flags != 0)
6113 {
6114 FILE *file = ptr;
6115
6116 fprintf (file, _("private flags = 0x%lx:"),
6117 elf_elfheader (abfd)->e_flags);
6118
6119 if ((elf_elfheader (abfd)->e_flags & EF_PPC64_ABI) != 0)
6120 fprintf (file, _(" [abiv%ld]"),
6121 elf_elfheader (abfd)->e_flags & EF_PPC64_ABI);
6122 fputc ('\n', file);
6123 }
6124
6125 return TRUE;
6126 }
6127
6128 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
6129 of the code entry point, and its section, which must be in the same
6130 object as OPD_SEC. Returns (bfd_vma) -1 on error. */
6131
6132 static bfd_vma
6133 opd_entry_value (asection *opd_sec,
6134 bfd_vma offset,
6135 asection **code_sec,
6136 bfd_vma *code_off,
6137 bfd_boolean in_code_sec)
6138 {
6139 bfd *opd_bfd = opd_sec->owner;
6140 Elf_Internal_Rela *relocs;
6141 Elf_Internal_Rela *lo, *hi, *look;
6142 bfd_vma val;
6143
6144 /* No relocs implies we are linking a --just-symbols object, or looking
6145 at a final linked executable with addr2line or somesuch. */
6146 if (opd_sec->reloc_count == 0)
6147 {
6148 bfd_byte *contents = ppc64_elf_tdata (opd_bfd)->opd.contents;
6149
6150 if (contents == NULL)
6151 {
6152 if (!bfd_malloc_and_get_section (opd_bfd, opd_sec, &contents))
6153 return (bfd_vma) -1;
6154 ppc64_elf_tdata (opd_bfd)->opd.contents = contents;
6155 }
6156
6157 /* PR 17512: file: 64b9dfbb. */
6158 if (offset + 7 >= opd_sec->size || offset + 7 < offset)
6159 return (bfd_vma) -1;
6160
6161 val = bfd_get_64 (opd_bfd, contents + offset);
6162 if (code_sec != NULL)
6163 {
6164 asection *sec, *likely = NULL;
6165
6166 if (in_code_sec)
6167 {
6168 sec = *code_sec;
6169 if (sec->vma <= val
6170 && val < sec->vma + sec->size)
6171 likely = sec;
6172 else
6173 val = -1;
6174 }
6175 else
6176 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
6177 if (sec->vma <= val
6178 && (sec->flags & SEC_LOAD) != 0
6179 && (sec->flags & SEC_ALLOC) != 0)
6180 likely = sec;
6181 if (likely != NULL)
6182 {
6183 *code_sec = likely;
6184 if (code_off != NULL)
6185 *code_off = val - likely->vma;
6186 }
6187 }
6188 return val;
6189 }
6190
6191 BFD_ASSERT (is_ppc64_elf (opd_bfd));
6192
6193 relocs = ppc64_elf_tdata (opd_bfd)->opd.relocs;
6194 if (relocs == NULL)
6195 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
6196 /* PR 17512: file: df8e1fd6. */
6197 if (relocs == NULL)
6198 return (bfd_vma) -1;
6199
6200 /* Go find the opd reloc at the sym address. */
6201 lo = relocs;
6202 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
6203 val = (bfd_vma) -1;
6204 while (lo < hi)
6205 {
6206 look = lo + (hi - lo) / 2;
6207 if (look->r_offset < offset)
6208 lo = look + 1;
6209 else if (look->r_offset > offset)
6210 hi = look;
6211 else
6212 {
6213 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (opd_bfd);
6214
6215 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
6216 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
6217 {
6218 unsigned long symndx = ELF64_R_SYM (look->r_info);
6219 asection *sec = NULL;
6220
6221 if (symndx >= symtab_hdr->sh_info
6222 && elf_sym_hashes (opd_bfd) != NULL)
6223 {
6224 struct elf_link_hash_entry **sym_hashes;
6225 struct elf_link_hash_entry *rh;
6226
6227 sym_hashes = elf_sym_hashes (opd_bfd);
6228 rh = sym_hashes[symndx - symtab_hdr->sh_info];
6229 if (rh != NULL)
6230 {
6231 rh = elf_follow_link (rh);
6232 if (rh->root.type != bfd_link_hash_defined
6233 && rh->root.type != bfd_link_hash_defweak)
6234 break;
6235 if (rh->root.u.def.section->owner == opd_bfd)
6236 {
6237 val = rh->root.u.def.value;
6238 sec = rh->root.u.def.section;
6239 }
6240 }
6241 }
6242
6243 if (sec == NULL)
6244 {
6245 Elf_Internal_Sym *sym;
6246
6247 if (symndx < symtab_hdr->sh_info)
6248 {
6249 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
6250 if (sym == NULL)
6251 {
6252 size_t symcnt = symtab_hdr->sh_info;
6253 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
6254 symcnt, 0,
6255 NULL, NULL, NULL);
6256 if (sym == NULL)
6257 break;
6258 symtab_hdr->contents = (bfd_byte *) sym;
6259 }
6260 sym += symndx;
6261 }
6262 else
6263 {
6264 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
6265 1, symndx,
6266 NULL, NULL, NULL);
6267 if (sym == NULL)
6268 break;
6269 }
6270 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
6271 if (sec == NULL)
6272 break;
6273 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
6274 val = sym->st_value;
6275 }
6276
6277 val += look->r_addend;
6278 if (code_off != NULL)
6279 *code_off = val;
6280 if (code_sec != NULL)
6281 {
6282 if (in_code_sec && *code_sec != sec)
6283 return -1;
6284 else
6285 *code_sec = sec;
6286 }
6287 if (sec->output_section != NULL)
6288 val += sec->output_section->vma + sec->output_offset;
6289 }
6290 break;
6291 }
6292 }
6293
6294 return val;
6295 }
6296
6297 /* If the ELF symbol SYM might be a function in SEC, return the
6298 function size and set *CODE_OFF to the function's entry point,
6299 otherwise return zero. */
6300
6301 static bfd_size_type
6302 ppc64_elf_maybe_function_sym (const asymbol *sym, asection *sec,
6303 bfd_vma *code_off)
6304 {
6305 bfd_size_type size;
6306
6307 if ((sym->flags & (BSF_SECTION_SYM | BSF_FILE | BSF_OBJECT
6308 | BSF_THREAD_LOCAL | BSF_RELC | BSF_SRELC)) != 0)
6309 return 0;
6310
6311 size = 0;
6312 if (!(sym->flags & BSF_SYNTHETIC))
6313 size = ((elf_symbol_type *) sym)->internal_elf_sym.st_size;
6314
6315 if (strcmp (sym->section->name, ".opd") == 0)
6316 {
6317 struct _opd_sec_data *opd = get_opd_info (sym->section);
6318 bfd_vma symval = sym->value;
6319
6320 if (opd != NULL
6321 && opd->adjust != NULL
6322 && elf_section_data (sym->section)->relocs != NULL)
6323 {
6324 /* opd_entry_value will use cached relocs that have been
6325 adjusted, but with raw symbols. That means both local
6326 and global symbols need adjusting. */
6327 long adjust = opd->adjust[OPD_NDX (symval)];
6328 if (adjust == -1)
6329 return 0;
6330 symval += adjust;
6331 }
6332
6333 if (opd_entry_value (sym->section, symval,
6334 &sec, code_off, TRUE) == (bfd_vma) -1)
6335 return 0;
6336 /* An old ABI binary with dot-syms has a size of 24 on the .opd
6337 symbol. This size has nothing to do with the code size of the
6338 function, which is what we're supposed to return, but the
6339 code size isn't available without looking up the dot-sym.
6340 However, doing that would be a waste of time particularly
6341 since elf_find_function will look at the dot-sym anyway.
6342 Now, elf_find_function will keep the largest size of any
6343 function sym found at the code address of interest, so return
6344 1 here to avoid it incorrectly caching a larger function size
6345 for a small function. This does mean we return the wrong
6346 size for a new-ABI function of size 24, but all that does is
6347 disable caching for such functions. */
6348 if (size == 24)
6349 size = 1;
6350 }
6351 else
6352 {
6353 if (sym->section != sec)
6354 return 0;
6355 *code_off = sym->value;
6356 }
6357 if (size == 0)
6358 size = 1;
6359 return size;
6360 }
6361
6362 /* Return true if symbol is a strong function defined in an ELFv2
6363 object with st_other localentry bits of zero, ie. its local entry
6364 point coincides with its global entry point. */
6365
6366 static bfd_boolean
6367 is_elfv2_localentry0 (struct elf_link_hash_entry *h)
6368 {
6369 return (h != NULL
6370 && h->type == STT_FUNC
6371 && h->root.type == bfd_link_hash_defined
6372 && (STO_PPC64_LOCAL_MASK & h->other) == 0
6373 && !((struct ppc_link_hash_entry *) h)->non_zero_localentry
6374 && is_ppc64_elf (h->root.u.def.section->owner)
6375 && abiversion (h->root.u.def.section->owner) >= 2);
6376 }
6377
6378 /* Return true if symbol is defined in a regular object file. */
6379
6380 static bfd_boolean
6381 is_static_defined (struct elf_link_hash_entry *h)
6382 {
6383 return ((h->root.type == bfd_link_hash_defined
6384 || h->root.type == bfd_link_hash_defweak)
6385 && h->root.u.def.section != NULL
6386 && h->root.u.def.section->output_section != NULL);
6387 }
6388
6389 /* If FDH is a function descriptor symbol, return the associated code
6390 entry symbol if it is defined. Return NULL otherwise. */
6391
6392 static struct ppc_link_hash_entry *
6393 defined_code_entry (struct ppc_link_hash_entry *fdh)
6394 {
6395 if (fdh->is_func_descriptor)
6396 {
6397 struct ppc_link_hash_entry *fh = ppc_follow_link (fdh->oh);
6398 if (fh->elf.root.type == bfd_link_hash_defined
6399 || fh->elf.root.type == bfd_link_hash_defweak)
6400 return fh;
6401 }
6402 return NULL;
6403 }
6404
6405 /* If FH is a function code entry symbol, return the associated
6406 function descriptor symbol if it is defined. Return NULL otherwise. */
6407
6408 static struct ppc_link_hash_entry *
6409 defined_func_desc (struct ppc_link_hash_entry *fh)
6410 {
6411 if (fh->oh != NULL
6412 && fh->oh->is_func_descriptor)
6413 {
6414 struct ppc_link_hash_entry *fdh = ppc_follow_link (fh->oh);
6415 if (fdh->elf.root.type == bfd_link_hash_defined
6416 || fdh->elf.root.type == bfd_link_hash_defweak)
6417 return fdh;
6418 }
6419 return NULL;
6420 }
6421
6422 static bfd_boolean func_desc_adjust (struct elf_link_hash_entry *, void *);
6423
6424 /* Garbage collect sections, after first dealing with dot-symbols. */
6425
6426 static bfd_boolean
6427 ppc64_elf_gc_sections (bfd *abfd, struct bfd_link_info *info)
6428 {
6429 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6430
6431 if (htab != NULL && htab->need_func_desc_adj)
6432 {
6433 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
6434 htab->need_func_desc_adj = 0;
6435 }
6436 return bfd_elf_gc_sections (abfd, info);
6437 }
6438
6439 /* Mark all our entry sym sections, both opd and code section. */
6440
6441 static void
6442 ppc64_elf_gc_keep (struct bfd_link_info *info)
6443 {
6444 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6445 struct bfd_sym_chain *sym;
6446
6447 if (htab == NULL)
6448 return;
6449
6450 for (sym = info->gc_sym_list; sym != NULL; sym = sym->next)
6451 {
6452 struct ppc_link_hash_entry *eh, *fh;
6453 asection *sec;
6454
6455 eh = (struct ppc_link_hash_entry *)
6456 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, TRUE);
6457 if (eh == NULL)
6458 continue;
6459 if (eh->elf.root.type != bfd_link_hash_defined
6460 && eh->elf.root.type != bfd_link_hash_defweak)
6461 continue;
6462
6463 fh = defined_code_entry (eh);
6464 if (fh != NULL)
6465 {
6466 sec = fh->elf.root.u.def.section;
6467 sec->flags |= SEC_KEEP;
6468 }
6469 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6470 && opd_entry_value (eh->elf.root.u.def.section,
6471 eh->elf.root.u.def.value,
6472 &sec, NULL, FALSE) != (bfd_vma) -1)
6473 sec->flags |= SEC_KEEP;
6474
6475 sec = eh->elf.root.u.def.section;
6476 sec->flags |= SEC_KEEP;
6477 }
6478 }
6479
6480 /* Mark sections containing dynamically referenced symbols. When
6481 building shared libraries, we must assume that any visible symbol is
6482 referenced. */
6483
6484 static bfd_boolean
6485 ppc64_elf_gc_mark_dynamic_ref (struct elf_link_hash_entry *h, void *inf)
6486 {
6487 struct bfd_link_info *info = (struct bfd_link_info *) inf;
6488 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
6489 struct ppc_link_hash_entry *fdh;
6490 struct bfd_elf_dynamic_list *d = info->dynamic_list;
6491
6492 /* Dynamic linking info is on the func descriptor sym. */
6493 fdh = defined_func_desc (eh);
6494 if (fdh != NULL)
6495 eh = fdh;
6496
6497 if ((eh->elf.root.type == bfd_link_hash_defined
6498 || eh->elf.root.type == bfd_link_hash_defweak)
6499 && (eh->elf.ref_dynamic
6500 || ((eh->elf.def_regular || ELF_COMMON_DEF_P (&eh->elf))
6501 && ELF_ST_VISIBILITY (eh->elf.other) != STV_INTERNAL
6502 && ELF_ST_VISIBILITY (eh->elf.other) != STV_HIDDEN
6503 && (!bfd_link_executable (info)
6504 || info->gc_keep_exported
6505 || info->export_dynamic
6506 || (eh->elf.dynamic
6507 && d != NULL
6508 && (*d->match) (&d->head, NULL, eh->elf.root.root.string)))
6509 && (eh->elf.versioned >= versioned
6510 || !bfd_hide_sym_by_version (info->version_info,
6511 eh->elf.root.root.string)))))
6512 {
6513 asection *code_sec;
6514 struct ppc_link_hash_entry *fh;
6515
6516 eh->elf.root.u.def.section->flags |= SEC_KEEP;
6517
6518 /* Function descriptor syms cause the associated
6519 function code sym section to be marked. */
6520 fh = defined_code_entry (eh);
6521 if (fh != NULL)
6522 {
6523 code_sec = fh->elf.root.u.def.section;
6524 code_sec->flags |= SEC_KEEP;
6525 }
6526 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6527 && opd_entry_value (eh->elf.root.u.def.section,
6528 eh->elf.root.u.def.value,
6529 &code_sec, NULL, FALSE) != (bfd_vma) -1)
6530 code_sec->flags |= SEC_KEEP;
6531 }
6532
6533 return TRUE;
6534 }
6535
6536 /* Return the section that should be marked against GC for a given
6537 relocation. */
6538
6539 static asection *
6540 ppc64_elf_gc_mark_hook (asection *sec,
6541 struct bfd_link_info *info,
6542 Elf_Internal_Rela *rel,
6543 struct elf_link_hash_entry *h,
6544 Elf_Internal_Sym *sym)
6545 {
6546 asection *rsec;
6547
6548 /* Syms return NULL if we're marking .opd, so we avoid marking all
6549 function sections, as all functions are referenced in .opd. */
6550 rsec = NULL;
6551 if (get_opd_info (sec) != NULL)
6552 return rsec;
6553
6554 if (h != NULL)
6555 {
6556 enum elf_ppc64_reloc_type r_type;
6557 struct ppc_link_hash_entry *eh, *fh, *fdh;
6558
6559 r_type = ELF64_R_TYPE (rel->r_info);
6560 switch (r_type)
6561 {
6562 case R_PPC64_GNU_VTINHERIT:
6563 case R_PPC64_GNU_VTENTRY:
6564 break;
6565
6566 default:
6567 switch (h->root.type)
6568 {
6569 case bfd_link_hash_defined:
6570 case bfd_link_hash_defweak:
6571 eh = (struct ppc_link_hash_entry *) h;
6572 fdh = defined_func_desc (eh);
6573 if (fdh != NULL)
6574 {
6575 /* -mcall-aixdesc code references the dot-symbol on
6576 a call reloc. Mark the function descriptor too
6577 against garbage collection. */
6578 fdh->elf.mark = 1;
6579 if (fdh->elf.u.weakdef != NULL)
6580 fdh->elf.u.weakdef->mark = 1;
6581 eh = fdh;
6582 }
6583
6584 /* Function descriptor syms cause the associated
6585 function code sym section to be marked. */
6586 fh = defined_code_entry (eh);
6587 if (fh != NULL)
6588 {
6589 /* They also mark their opd section. */
6590 eh->elf.root.u.def.section->gc_mark = 1;
6591
6592 rsec = fh->elf.root.u.def.section;
6593 }
6594 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6595 && opd_entry_value (eh->elf.root.u.def.section,
6596 eh->elf.root.u.def.value,
6597 &rsec, NULL, FALSE) != (bfd_vma) -1)
6598 eh->elf.root.u.def.section->gc_mark = 1;
6599 else
6600 rsec = h->root.u.def.section;
6601 break;
6602
6603 case bfd_link_hash_common:
6604 rsec = h->root.u.c.p->section;
6605 break;
6606
6607 default:
6608 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
6609 }
6610 }
6611 }
6612 else
6613 {
6614 struct _opd_sec_data *opd;
6615
6616 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
6617 opd = get_opd_info (rsec);
6618 if (opd != NULL && opd->func_sec != NULL)
6619 {
6620 rsec->gc_mark = 1;
6621
6622 rsec = opd->func_sec[OPD_NDX (sym->st_value + rel->r_addend)];
6623 }
6624 }
6625
6626 return rsec;
6627 }
6628
6629 /* The maximum size of .sfpr. */
6630 #define SFPR_MAX (218*4)
6631
6632 struct sfpr_def_parms
6633 {
6634 const char name[12];
6635 unsigned char lo, hi;
6636 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
6637 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
6638 };
6639
6640 /* Auto-generate _save*, _rest* functions in .sfpr.
6641 If STUB_SEC is non-null, define alias symbols in STUB_SEC
6642 instead. */
6643
6644 static bfd_boolean
6645 sfpr_define (struct bfd_link_info *info,
6646 const struct sfpr_def_parms *parm,
6647 asection *stub_sec)
6648 {
6649 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6650 unsigned int i;
6651 size_t len = strlen (parm->name);
6652 bfd_boolean writing = FALSE;
6653 char sym[16];
6654
6655 if (htab == NULL)
6656 return FALSE;
6657
6658 memcpy (sym, parm->name, len);
6659 sym[len + 2] = 0;
6660
6661 for (i = parm->lo; i <= parm->hi; i++)
6662 {
6663 struct ppc_link_hash_entry *h;
6664
6665 sym[len + 0] = i / 10 + '0';
6666 sym[len + 1] = i % 10 + '0';
6667 h = (struct ppc_link_hash_entry *)
6668 elf_link_hash_lookup (&htab->elf, sym, writing, TRUE, TRUE);
6669 if (stub_sec != NULL)
6670 {
6671 if (h != NULL
6672 && h->elf.root.type == bfd_link_hash_defined
6673 && h->elf.root.u.def.section == htab->sfpr)
6674 {
6675 struct elf_link_hash_entry *s;
6676 char buf[32];
6677 sprintf (buf, "%08x.%s", stub_sec->id & 0xffffffff, sym);
6678 s = elf_link_hash_lookup (&htab->elf, buf, TRUE, TRUE, FALSE);
6679 if (s == NULL)
6680 return FALSE;
6681 if (s->root.type == bfd_link_hash_new
6682 || (s->root.type = bfd_link_hash_defined
6683 && s->root.u.def.section == stub_sec))
6684 {
6685 s->root.type = bfd_link_hash_defined;
6686 s->root.u.def.section = stub_sec;
6687 s->root.u.def.value = (stub_sec->size
6688 + h->elf.root.u.def.value);
6689 s->ref_regular = 1;
6690 s->def_regular = 1;
6691 s->ref_regular_nonweak = 1;
6692 s->forced_local = 1;
6693 s->non_elf = 0;
6694 s->root.linker_def = 1;
6695 }
6696 }
6697 continue;
6698 }
6699 if (h != NULL)
6700 {
6701 h->save_res = 1;
6702 if (!h->elf.def_regular)
6703 {
6704 h->elf.root.type = bfd_link_hash_defined;
6705 h->elf.root.u.def.section = htab->sfpr;
6706 h->elf.root.u.def.value = htab->sfpr->size;
6707 h->elf.type = STT_FUNC;
6708 h->elf.def_regular = 1;
6709 h->elf.non_elf = 0;
6710 _bfd_elf_link_hash_hide_symbol (info, &h->elf, TRUE);
6711 writing = TRUE;
6712 if (htab->sfpr->contents == NULL)
6713 {
6714 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
6715 if (htab->sfpr->contents == NULL)
6716 return FALSE;
6717 }
6718 }
6719 }
6720 if (writing)
6721 {
6722 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
6723 if (i != parm->hi)
6724 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
6725 else
6726 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
6727 htab->sfpr->size = p - htab->sfpr->contents;
6728 }
6729 }
6730
6731 return TRUE;
6732 }
6733
6734 static bfd_byte *
6735 savegpr0 (bfd *abfd, bfd_byte *p, int r)
6736 {
6737 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6738 return p + 4;
6739 }
6740
6741 static bfd_byte *
6742 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
6743 {
6744 p = savegpr0 (abfd, p, r);
6745 bfd_put_32 (abfd, STD_R0_0R1 + STK_LR, p);
6746 p = p + 4;
6747 bfd_put_32 (abfd, BLR, p);
6748 return p + 4;
6749 }
6750
6751 static bfd_byte *
6752 restgpr0 (bfd *abfd, bfd_byte *p, int r)
6753 {
6754 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6755 return p + 4;
6756 }
6757
6758 static bfd_byte *
6759 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
6760 {
6761 bfd_put_32 (abfd, LD_R0_0R1 + STK_LR, p);
6762 p = p + 4;
6763 p = restgpr0 (abfd, p, r);
6764 bfd_put_32 (abfd, MTLR_R0, p);
6765 p = p + 4;
6766 if (r == 29)
6767 {
6768 p = restgpr0 (abfd, p, 30);
6769 p = restgpr0 (abfd, p, 31);
6770 }
6771 bfd_put_32 (abfd, BLR, p);
6772 return p + 4;
6773 }
6774
6775 static bfd_byte *
6776 savegpr1 (bfd *abfd, bfd_byte *p, int r)
6777 {
6778 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6779 return p + 4;
6780 }
6781
6782 static bfd_byte *
6783 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
6784 {
6785 p = savegpr1 (abfd, p, r);
6786 bfd_put_32 (abfd, BLR, p);
6787 return p + 4;
6788 }
6789
6790 static bfd_byte *
6791 restgpr1 (bfd *abfd, bfd_byte *p, int r)
6792 {
6793 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6794 return p + 4;
6795 }
6796
6797 static bfd_byte *
6798 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
6799 {
6800 p = restgpr1 (abfd, p, r);
6801 bfd_put_32 (abfd, BLR, p);
6802 return p + 4;
6803 }
6804
6805 static bfd_byte *
6806 savefpr (bfd *abfd, bfd_byte *p, int r)
6807 {
6808 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6809 return p + 4;
6810 }
6811
6812 static bfd_byte *
6813 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
6814 {
6815 p = savefpr (abfd, p, r);
6816 bfd_put_32 (abfd, STD_R0_0R1 + STK_LR, p);
6817 p = p + 4;
6818 bfd_put_32 (abfd, BLR, p);
6819 return p + 4;
6820 }
6821
6822 static bfd_byte *
6823 restfpr (bfd *abfd, bfd_byte *p, int r)
6824 {
6825 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6826 return p + 4;
6827 }
6828
6829 static bfd_byte *
6830 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
6831 {
6832 bfd_put_32 (abfd, LD_R0_0R1 + STK_LR, p);
6833 p = p + 4;
6834 p = restfpr (abfd, p, r);
6835 bfd_put_32 (abfd, MTLR_R0, p);
6836 p = p + 4;
6837 if (r == 29)
6838 {
6839 p = restfpr (abfd, p, 30);
6840 p = restfpr (abfd, p, 31);
6841 }
6842 bfd_put_32 (abfd, BLR, p);
6843 return p + 4;
6844 }
6845
6846 static bfd_byte *
6847 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
6848 {
6849 p = savefpr (abfd, p, r);
6850 bfd_put_32 (abfd, BLR, p);
6851 return p + 4;
6852 }
6853
6854 static bfd_byte *
6855 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
6856 {
6857 p = restfpr (abfd, p, r);
6858 bfd_put_32 (abfd, BLR, p);
6859 return p + 4;
6860 }
6861
6862 static bfd_byte *
6863 savevr (bfd *abfd, bfd_byte *p, int r)
6864 {
6865 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6866 p = p + 4;
6867 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
6868 return p + 4;
6869 }
6870
6871 static bfd_byte *
6872 savevr_tail (bfd *abfd, bfd_byte *p, int r)
6873 {
6874 p = savevr (abfd, p, r);
6875 bfd_put_32 (abfd, BLR, p);
6876 return p + 4;
6877 }
6878
6879 static bfd_byte *
6880 restvr (bfd *abfd, bfd_byte *p, int r)
6881 {
6882 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6883 p = p + 4;
6884 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
6885 return p + 4;
6886 }
6887
6888 static bfd_byte *
6889 restvr_tail (bfd *abfd, bfd_byte *p, int r)
6890 {
6891 p = restvr (abfd, p, r);
6892 bfd_put_32 (abfd, BLR, p);
6893 return p + 4;
6894 }
6895
6896 /* Called via elf_link_hash_traverse to transfer dynamic linking
6897 information on function code symbol entries to their corresponding
6898 function descriptor symbol entries. */
6899
6900 static bfd_boolean
6901 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
6902 {
6903 struct bfd_link_info *info;
6904 struct ppc_link_hash_table *htab;
6905 struct ppc_link_hash_entry *fh;
6906 struct ppc_link_hash_entry *fdh;
6907 bfd_boolean force_local;
6908
6909 fh = (struct ppc_link_hash_entry *) h;
6910 if (fh->elf.root.type == bfd_link_hash_indirect)
6911 return TRUE;
6912
6913 if (!fh->is_func)
6914 return TRUE;
6915
6916 if (fh->elf.root.root.string[0] != '.'
6917 || fh->elf.root.root.string[1] == '\0')
6918 return TRUE;
6919
6920 info = inf;
6921 htab = ppc_hash_table (info);
6922 if (htab == NULL)
6923 return FALSE;
6924
6925 /* Find the corresponding function descriptor symbol. */
6926 fdh = lookup_fdh (fh, htab);
6927
6928 /* Resolve undefined references to dot-symbols as the value
6929 in the function descriptor, if we have one in a regular object.
6930 This is to satisfy cases like ".quad .foo". Calls to functions
6931 in dynamic objects are handled elsewhere. */
6932 if ((fh->elf.root.type == bfd_link_hash_undefined
6933 || fh->elf.root.type == bfd_link_hash_undefweak)
6934 && (fdh->elf.root.type == bfd_link_hash_defined
6935 || fdh->elf.root.type == bfd_link_hash_defweak)
6936 && get_opd_info (fdh->elf.root.u.def.section) != NULL
6937 && opd_entry_value (fdh->elf.root.u.def.section,
6938 fdh->elf.root.u.def.value,
6939 &fh->elf.root.u.def.section,
6940 &fh->elf.root.u.def.value, FALSE) != (bfd_vma) -1)
6941 {
6942 fh->elf.root.type = fdh->elf.root.type;
6943 fh->elf.forced_local = 1;
6944 fh->elf.def_regular = fdh->elf.def_regular;
6945 fh->elf.def_dynamic = fdh->elf.def_dynamic;
6946 }
6947
6948 if (!fh->elf.dynamic)
6949 {
6950 struct plt_entry *ent;
6951
6952 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
6953 if (ent->plt.refcount > 0)
6954 break;
6955 if (ent == NULL)
6956 return TRUE;
6957 }
6958
6959 /* Create a descriptor as undefined if necessary. */
6960 if (fdh == NULL
6961 && !bfd_link_executable (info)
6962 && (fh->elf.root.type == bfd_link_hash_undefined
6963 || fh->elf.root.type == bfd_link_hash_undefweak))
6964 {
6965 fdh = make_fdh (info, fh);
6966 if (fdh == NULL)
6967 return FALSE;
6968 }
6969
6970 /* We can't support overriding of symbols on a fake descriptor. */
6971 if (fdh != NULL
6972 && fdh->fake
6973 && (fh->elf.root.type == bfd_link_hash_defined
6974 || fh->elf.root.type == bfd_link_hash_defweak))
6975 _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE);
6976
6977 /* Transfer dynamic linking information to the function descriptor. */
6978 if (fdh != NULL)
6979 {
6980 fdh->elf.ref_regular |= fh->elf.ref_regular;
6981 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
6982 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
6983 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
6984 fdh->elf.dynamic |= fh->elf.dynamic;
6985 fdh->elf.needs_plt |= (fh->elf.needs_plt
6986 || fh->elf.type == STT_FUNC
6987 || fh->elf.type == STT_GNU_IFUNC);
6988 move_plt_plist (fh, fdh);
6989
6990 if (!fdh->elf.forced_local
6991 && fh->elf.dynindx != -1)
6992 if (!bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
6993 return FALSE;
6994 }
6995
6996 /* Now that the info is on the function descriptor, clear the
6997 function code sym info. Any function code syms for which we
6998 don't have a definition in a regular file, we force local.
6999 This prevents a shared library from exporting syms that have
7000 been imported from another library. Function code syms that
7001 are really in the library we must leave global to prevent the
7002 linker dragging in a definition from a static library. */
7003 force_local = (!fh->elf.def_regular
7004 || fdh == NULL
7005 || !fdh->elf.def_regular
7006 || fdh->elf.forced_local);
7007 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
7008
7009 return TRUE;
7010 }
7011
7012 static const struct sfpr_def_parms save_res_funcs[] =
7013 {
7014 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
7015 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
7016 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
7017 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
7018 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
7019 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
7020 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
7021 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
7022 { "._savef", 14, 31, savefpr, savefpr1_tail },
7023 { "._restf", 14, 31, restfpr, restfpr1_tail },
7024 { "_savevr_", 20, 31, savevr, savevr_tail },
7025 { "_restvr_", 20, 31, restvr, restvr_tail }
7026 };
7027
7028 /* Called near the start of bfd_elf_size_dynamic_sections. We use
7029 this hook to a) provide some gcc support functions, and b) transfer
7030 dynamic linking information gathered so far on function code symbol
7031 entries, to their corresponding function descriptor symbol entries. */
7032
7033 static bfd_boolean
7034 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
7035 struct bfd_link_info *info)
7036 {
7037 struct ppc_link_hash_table *htab;
7038
7039 htab = ppc_hash_table (info);
7040 if (htab == NULL)
7041 return FALSE;
7042
7043 /* Provide any missing _save* and _rest* functions. */
7044 if (htab->sfpr != NULL)
7045 {
7046 unsigned int i;
7047
7048 htab->sfpr->size = 0;
7049 for (i = 0; i < ARRAY_SIZE (save_res_funcs); i++)
7050 if (!sfpr_define (info, &save_res_funcs[i], NULL))
7051 return FALSE;
7052 if (htab->sfpr->size == 0)
7053 htab->sfpr->flags |= SEC_EXCLUDE;
7054 }
7055
7056 if (bfd_link_relocatable (info))
7057 return TRUE;
7058
7059 if (htab->elf.hgot != NULL)
7060 {
7061 _bfd_elf_link_hash_hide_symbol (info, htab->elf.hgot, TRUE);
7062 /* Make .TOC. defined so as to prevent it being made dynamic.
7063 The wrong value here is fixed later in ppc64_elf_set_toc. */
7064 if (!htab->elf.hgot->def_regular
7065 || htab->elf.hgot->root.type != bfd_link_hash_defined)
7066 {
7067 htab->elf.hgot->root.type = bfd_link_hash_defined;
7068 htab->elf.hgot->root.u.def.value = 0;
7069 htab->elf.hgot->root.u.def.section = bfd_abs_section_ptr;
7070 htab->elf.hgot->def_regular = 1;
7071 htab->elf.hgot->root.linker_def = 1;
7072 }
7073 htab->elf.hgot->type = STT_OBJECT;
7074 htab->elf.hgot->other = ((htab->elf.hgot->other & ~ELF_ST_VISIBILITY (-1))
7075 | STV_HIDDEN);
7076 }
7077
7078 if (htab->need_func_desc_adj)
7079 {
7080 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
7081 htab->need_func_desc_adj = 0;
7082 }
7083
7084 return TRUE;
7085 }
7086
7087 /* Return true if we have dynamic relocs against H that apply to
7088 read-only sections. */
7089
7090 static bfd_boolean
7091 readonly_dynrelocs (struct elf_link_hash_entry *h)
7092 {
7093 struct ppc_link_hash_entry *eh;
7094 struct elf_dyn_relocs *p;
7095
7096 eh = (struct ppc_link_hash_entry *) h;
7097 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7098 {
7099 asection *s = p->sec->output_section;
7100
7101 if (s != NULL && (s->flags & SEC_READONLY) != 0)
7102 return TRUE;
7103 }
7104 return FALSE;
7105 }
7106
7107 /* Return true if we have dynamic relocs against H or any of its weak
7108 aliases, that apply to read-only sections. */
7109
7110 static bfd_boolean
7111 alias_readonly_dynrelocs (struct elf_link_hash_entry *h)
7112 {
7113 struct ppc_link_hash_entry *eh;
7114
7115 eh = (struct ppc_link_hash_entry *) h;
7116 do
7117 {
7118 if (readonly_dynrelocs (&eh->elf))
7119 return TRUE;
7120 eh = eh->weakref;
7121 } while (eh != NULL && &eh->elf != h);
7122
7123 return FALSE;
7124 }
7125
7126 /* Return whether EH has pc-relative dynamic relocs. */
7127
7128 static bfd_boolean
7129 pc_dynrelocs (struct ppc_link_hash_entry *eh)
7130 {
7131 struct elf_dyn_relocs *p;
7132
7133 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7134 if (p->pc_count != 0)
7135 return TRUE;
7136 return FALSE;
7137 }
7138
7139 /* Return true if a global entry stub will be created for H. Valid
7140 for ELFv2 before plt entries have been allocated. */
7141
7142 static bfd_boolean
7143 global_entry_stub (struct elf_link_hash_entry *h)
7144 {
7145 struct plt_entry *pent;
7146
7147 if (!h->pointer_equality_needed
7148 || h->def_regular)
7149 return FALSE;
7150
7151 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
7152 if (pent->plt.refcount > 0
7153 && pent->addend == 0)
7154 return TRUE;
7155
7156 return FALSE;
7157 }
7158
7159 /* Adjust a symbol defined by a dynamic object and referenced by a
7160 regular object. The current definition is in some section of the
7161 dynamic object, but we're not including those sections. We have to
7162 change the definition to something the rest of the link can
7163 understand. */
7164
7165 static bfd_boolean
7166 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
7167 struct elf_link_hash_entry *h)
7168 {
7169 struct ppc_link_hash_table *htab;
7170 asection *s, *srel;
7171
7172 htab = ppc_hash_table (info);
7173 if (htab == NULL)
7174 return FALSE;
7175
7176 /* Deal with function syms. */
7177 if (h->type == STT_FUNC
7178 || h->type == STT_GNU_IFUNC
7179 || h->needs_plt)
7180 {
7181 /* Clear procedure linkage table information for any symbol that
7182 won't need a .plt entry. */
7183 struct plt_entry *ent;
7184 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
7185 if (ent->plt.refcount > 0)
7186 break;
7187 if (ent == NULL
7188 || (h->type != STT_GNU_IFUNC
7189 && (SYMBOL_CALLS_LOCAL (info, h)
7190 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)))
7191 || ((struct ppc_link_hash_entry *) h)->save_res)
7192 {
7193 h->plt.plist = NULL;
7194 h->needs_plt = 0;
7195 h->pointer_equality_needed = 0;
7196 /* After adjust_dynamic_symbol, non_got_ref set in the
7197 non-pic case means that dyn_relocs for this symbol should
7198 be discarded. We either want the symbol to remain
7199 undefined, or we have a local definition of some sort.
7200 The "local definition" for non-function symbols may be
7201 due to creating a local definition in .dynbss, and for
7202 ELFv2 function symbols, defining the symbol on the PLT
7203 call stub code. Set non_got_ref here to ensure undef
7204 weaks stay undefined. */
7205 h->non_got_ref = 1;
7206 }
7207 else if (abiversion (info->output_bfd) >= 2)
7208 {
7209 /* Taking a function's address in a read/write section
7210 doesn't require us to define the function symbol in the
7211 executable on a global entry stub. A dynamic reloc can
7212 be used instead. The reason we prefer a few more dynamic
7213 relocs is that calling via a global entry stub costs a
7214 few more instructions, and pointer_equality_needed causes
7215 extra work in ld.so when resolving these symbols. */
7216 if (global_entry_stub (h)
7217 && !alias_readonly_dynrelocs (h))
7218 {
7219 h->pointer_equality_needed = 0;
7220 /* Say that we do want dynamic relocs. */
7221 h->non_got_ref = 0;
7222 /* If we haven't seen a branch reloc then we don't need
7223 a plt entry. */
7224 if (!h->needs_plt)
7225 h->plt.plist = NULL;
7226 }
7227
7228 /* ELFv2 function symbols can't have copy relocs. */
7229 return TRUE;
7230 }
7231 else if (!h->needs_plt
7232 && !alias_readonly_dynrelocs (h))
7233 {
7234 /* If we haven't seen a branch reloc then we don't need a
7235 plt entry. */
7236 h->plt.plist = NULL;
7237 h->pointer_equality_needed = 0;
7238 h->non_got_ref = 0;
7239 return TRUE;
7240 }
7241 }
7242 else
7243 h->plt.plist = NULL;
7244
7245 /* If this is a weak symbol, and there is a real definition, the
7246 processor independent code will have arranged for us to see the
7247 real definition first, and we can just use the same value. */
7248 if (h->u.weakdef != NULL)
7249 {
7250 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
7251 || h->u.weakdef->root.type == bfd_link_hash_defweak);
7252 h->root.u.def.section = h->u.weakdef->root.u.def.section;
7253 h->root.u.def.value = h->u.weakdef->root.u.def.value;
7254 if (ELIMINATE_COPY_RELOCS)
7255 h->non_got_ref = h->u.weakdef->non_got_ref;
7256 return TRUE;
7257 }
7258
7259 /* If we are creating a shared library, we must presume that the
7260 only references to the symbol are via the global offset table.
7261 For such cases we need not do anything here; the relocations will
7262 be handled correctly by relocate_section. */
7263 if (bfd_link_pic (info))
7264 return TRUE;
7265
7266 /* If there are no references to this symbol that do not use the
7267 GOT, we don't need to generate a copy reloc. */
7268 if (!h->non_got_ref)
7269 return TRUE;
7270
7271 /* Don't generate a copy reloc for symbols defined in the executable. */
7272 if (!h->def_dynamic || !h->ref_regular || h->def_regular
7273
7274 /* If -z nocopyreloc was given, don't generate them either. */
7275 || info->nocopyreloc
7276
7277 /* If we didn't find any dynamic relocs in read-only sections, then
7278 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
7279 || (ELIMINATE_COPY_RELOCS && !alias_readonly_dynrelocs (h))
7280
7281 /* Protected variables do not work with .dynbss. The copy in
7282 .dynbss won't be used by the shared library with the protected
7283 definition for the variable. Text relocations are preferable
7284 to an incorrect program. */
7285 || h->protected_def)
7286 {
7287 h->non_got_ref = 0;
7288 return TRUE;
7289 }
7290
7291 if (h->plt.plist != NULL)
7292 {
7293 /* We should never get here, but unfortunately there are versions
7294 of gcc out there that improperly (for this ABI) put initialized
7295 function pointers, vtable refs and suchlike in read-only
7296 sections. Allow them to proceed, but warn that this might
7297 break at runtime. */
7298 info->callbacks->einfo
7299 (_("%P: copy reloc against `%T' requires lazy plt linking; "
7300 "avoid setting LD_BIND_NOW=1 or upgrade gcc\n"),
7301 h->root.root.string);
7302 }
7303
7304 /* This is a reference to a symbol defined by a dynamic object which
7305 is not a function. */
7306
7307 /* We must allocate the symbol in our .dynbss section, which will
7308 become part of the .bss section of the executable. There will be
7309 an entry for this symbol in the .dynsym section. The dynamic
7310 object will contain position independent code, so all references
7311 from the dynamic object to this symbol will go through the global
7312 offset table. The dynamic linker will use the .dynsym entry to
7313 determine the address it must put in the global offset table, so
7314 both the dynamic object and the regular object will refer to the
7315 same memory location for the variable. */
7316
7317 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
7318 to copy the initial value out of the dynamic object and into the
7319 runtime process image. We need to remember the offset into the
7320 .rela.bss section we are going to use. */
7321 if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
7322 {
7323 s = htab->elf.sdynrelro;
7324 srel = htab->elf.sreldynrelro;
7325 }
7326 else
7327 {
7328 s = htab->elf.sdynbss;
7329 srel = htab->elf.srelbss;
7330 }
7331 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
7332 {
7333 srel->size += sizeof (Elf64_External_Rela);
7334 h->needs_copy = 1;
7335 }
7336
7337 return _bfd_elf_adjust_dynamic_copy (info, h, s);
7338 }
7339
7340 /* If given a function descriptor symbol, hide both the function code
7341 sym and the descriptor. */
7342 static void
7343 ppc64_elf_hide_symbol (struct bfd_link_info *info,
7344 struct elf_link_hash_entry *h,
7345 bfd_boolean force_local)
7346 {
7347 struct ppc_link_hash_entry *eh;
7348 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
7349
7350 eh = (struct ppc_link_hash_entry *) h;
7351 if (eh->is_func_descriptor)
7352 {
7353 struct ppc_link_hash_entry *fh = eh->oh;
7354
7355 if (fh == NULL)
7356 {
7357 const char *p, *q;
7358 struct elf_link_hash_table *htab = elf_hash_table (info);
7359 char save;
7360
7361 /* We aren't supposed to use alloca in BFD because on
7362 systems which do not have alloca the version in libiberty
7363 calls xmalloc, which might cause the program to crash
7364 when it runs out of memory. This function doesn't have a
7365 return status, so there's no way to gracefully return an
7366 error. So cheat. We know that string[-1] can be safely
7367 accessed; It's either a string in an ELF string table,
7368 or allocated in an objalloc structure. */
7369
7370 p = eh->elf.root.root.string - 1;
7371 save = *p;
7372 *(char *) p = '.';
7373 fh = (struct ppc_link_hash_entry *)
7374 elf_link_hash_lookup (htab, p, FALSE, FALSE, FALSE);
7375 *(char *) p = save;
7376
7377 /* Unfortunately, if it so happens that the string we were
7378 looking for was allocated immediately before this string,
7379 then we overwrote the string terminator. That's the only
7380 reason the lookup should fail. */
7381 if (fh == NULL)
7382 {
7383 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
7384 while (q >= eh->elf.root.root.string && *q == *p)
7385 --q, --p;
7386 if (q < eh->elf.root.root.string && *p == '.')
7387 fh = (struct ppc_link_hash_entry *)
7388 elf_link_hash_lookup (htab, p, FALSE, FALSE, FALSE);
7389 }
7390 if (fh != NULL)
7391 {
7392 eh->oh = fh;
7393 fh->oh = eh;
7394 }
7395 }
7396 if (fh != NULL)
7397 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
7398 }
7399 }
7400
7401 static bfd_boolean
7402 get_sym_h (struct elf_link_hash_entry **hp,
7403 Elf_Internal_Sym **symp,
7404 asection **symsecp,
7405 unsigned char **tls_maskp,
7406 Elf_Internal_Sym **locsymsp,
7407 unsigned long r_symndx,
7408 bfd *ibfd)
7409 {
7410 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
7411
7412 if (r_symndx >= symtab_hdr->sh_info)
7413 {
7414 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
7415 struct elf_link_hash_entry *h;
7416
7417 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
7418 h = elf_follow_link (h);
7419
7420 if (hp != NULL)
7421 *hp = h;
7422
7423 if (symp != NULL)
7424 *symp = NULL;
7425
7426 if (symsecp != NULL)
7427 {
7428 asection *symsec = NULL;
7429 if (h->root.type == bfd_link_hash_defined
7430 || h->root.type == bfd_link_hash_defweak)
7431 symsec = h->root.u.def.section;
7432 *symsecp = symsec;
7433 }
7434
7435 if (tls_maskp != NULL)
7436 {
7437 struct ppc_link_hash_entry *eh;
7438
7439 eh = (struct ppc_link_hash_entry *) h;
7440 *tls_maskp = &eh->tls_mask;
7441 }
7442 }
7443 else
7444 {
7445 Elf_Internal_Sym *sym;
7446 Elf_Internal_Sym *locsyms = *locsymsp;
7447
7448 if (locsyms == NULL)
7449 {
7450 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
7451 if (locsyms == NULL)
7452 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
7453 symtab_hdr->sh_info,
7454 0, NULL, NULL, NULL);
7455 if (locsyms == NULL)
7456 return FALSE;
7457 *locsymsp = locsyms;
7458 }
7459 sym = locsyms + r_symndx;
7460
7461 if (hp != NULL)
7462 *hp = NULL;
7463
7464 if (symp != NULL)
7465 *symp = sym;
7466
7467 if (symsecp != NULL)
7468 *symsecp = bfd_section_from_elf_index (ibfd, sym->st_shndx);
7469
7470 if (tls_maskp != NULL)
7471 {
7472 struct got_entry **lgot_ents;
7473 unsigned char *tls_mask;
7474
7475 tls_mask = NULL;
7476 lgot_ents = elf_local_got_ents (ibfd);
7477 if (lgot_ents != NULL)
7478 {
7479 struct plt_entry **local_plt = (struct plt_entry **)
7480 (lgot_ents + symtab_hdr->sh_info);
7481 unsigned char *lgot_masks = (unsigned char *)
7482 (local_plt + symtab_hdr->sh_info);
7483 tls_mask = &lgot_masks[r_symndx];
7484 }
7485 *tls_maskp = tls_mask;
7486 }
7487 }
7488 return TRUE;
7489 }
7490
7491 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
7492 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
7493 type suitable for optimization, and 1 otherwise. */
7494
7495 static int
7496 get_tls_mask (unsigned char **tls_maskp,
7497 unsigned long *toc_symndx,
7498 bfd_vma *toc_addend,
7499 Elf_Internal_Sym **locsymsp,
7500 const Elf_Internal_Rela *rel,
7501 bfd *ibfd)
7502 {
7503 unsigned long r_symndx;
7504 int next_r;
7505 struct elf_link_hash_entry *h;
7506 Elf_Internal_Sym *sym;
7507 asection *sec;
7508 bfd_vma off;
7509
7510 r_symndx = ELF64_R_SYM (rel->r_info);
7511 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
7512 return 0;
7513
7514 if ((*tls_maskp != NULL && **tls_maskp != 0)
7515 || sec == NULL
7516 || ppc64_elf_section_data (sec) == NULL
7517 || ppc64_elf_section_data (sec)->sec_type != sec_toc)
7518 return 1;
7519
7520 /* Look inside a TOC section too. */
7521 if (h != NULL)
7522 {
7523 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
7524 off = h->root.u.def.value;
7525 }
7526 else
7527 off = sym->st_value;
7528 off += rel->r_addend;
7529 BFD_ASSERT (off % 8 == 0);
7530 r_symndx = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8];
7531 next_r = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8 + 1];
7532 if (toc_symndx != NULL)
7533 *toc_symndx = r_symndx;
7534 if (toc_addend != NULL)
7535 *toc_addend = ppc64_elf_section_data (sec)->u.toc.add[off / 8];
7536 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
7537 return 0;
7538 if ((h == NULL || is_static_defined (h))
7539 && (next_r == -1 || next_r == -2))
7540 return 1 - next_r;
7541 return 1;
7542 }
7543
7544 /* Find (or create) an entry in the tocsave hash table. */
7545
7546 static struct tocsave_entry *
7547 tocsave_find (struct ppc_link_hash_table *htab,
7548 enum insert_option insert,
7549 Elf_Internal_Sym **local_syms,
7550 const Elf_Internal_Rela *irela,
7551 bfd *ibfd)
7552 {
7553 unsigned long r_indx;
7554 struct elf_link_hash_entry *h;
7555 Elf_Internal_Sym *sym;
7556 struct tocsave_entry ent, *p;
7557 hashval_t hash;
7558 struct tocsave_entry **slot;
7559
7560 r_indx = ELF64_R_SYM (irela->r_info);
7561 if (!get_sym_h (&h, &sym, &ent.sec, NULL, local_syms, r_indx, ibfd))
7562 return NULL;
7563 if (ent.sec == NULL || ent.sec->output_section == NULL)
7564 {
7565 _bfd_error_handler
7566 (_("%B: undefined symbol on R_PPC64_TOCSAVE relocation"), ibfd);
7567 return NULL;
7568 }
7569
7570 if (h != NULL)
7571 ent.offset = h->root.u.def.value;
7572 else
7573 ent.offset = sym->st_value;
7574 ent.offset += irela->r_addend;
7575
7576 hash = tocsave_htab_hash (&ent);
7577 slot = ((struct tocsave_entry **)
7578 htab_find_slot_with_hash (htab->tocsave_htab, &ent, hash, insert));
7579 if (slot == NULL)
7580 return NULL;
7581
7582 if (*slot == NULL)
7583 {
7584 p = (struct tocsave_entry *) bfd_alloc (ibfd, sizeof (*p));
7585 if (p == NULL)
7586 return NULL;
7587 *p = ent;
7588 *slot = p;
7589 }
7590 return *slot;
7591 }
7592
7593 /* Adjust all global syms defined in opd sections. In gcc generated
7594 code for the old ABI, these will already have been done. */
7595
7596 static bfd_boolean
7597 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
7598 {
7599 struct ppc_link_hash_entry *eh;
7600 asection *sym_sec;
7601 struct _opd_sec_data *opd;
7602
7603 if (h->root.type == bfd_link_hash_indirect)
7604 return TRUE;
7605
7606 if (h->root.type != bfd_link_hash_defined
7607 && h->root.type != bfd_link_hash_defweak)
7608 return TRUE;
7609
7610 eh = (struct ppc_link_hash_entry *) h;
7611 if (eh->adjust_done)
7612 return TRUE;
7613
7614 sym_sec = eh->elf.root.u.def.section;
7615 opd = get_opd_info (sym_sec);
7616 if (opd != NULL && opd->adjust != NULL)
7617 {
7618 long adjust = opd->adjust[OPD_NDX (eh->elf.root.u.def.value)];
7619 if (adjust == -1)
7620 {
7621 /* This entry has been deleted. */
7622 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
7623 if (dsec == NULL)
7624 {
7625 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
7626 if (discarded_section (dsec))
7627 {
7628 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
7629 break;
7630 }
7631 }
7632 eh->elf.root.u.def.value = 0;
7633 eh->elf.root.u.def.section = dsec;
7634 }
7635 else
7636 eh->elf.root.u.def.value += adjust;
7637 eh->adjust_done = 1;
7638 }
7639 return TRUE;
7640 }
7641
7642 /* Handles decrementing dynamic reloc counts for the reloc specified by
7643 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM
7644 have already been determined. */
7645
7646 static bfd_boolean
7647 dec_dynrel_count (bfd_vma r_info,
7648 asection *sec,
7649 struct bfd_link_info *info,
7650 Elf_Internal_Sym **local_syms,
7651 struct elf_link_hash_entry *h,
7652 Elf_Internal_Sym *sym)
7653 {
7654 enum elf_ppc64_reloc_type r_type;
7655 asection *sym_sec = NULL;
7656
7657 /* Can this reloc be dynamic? This switch, and later tests here
7658 should be kept in sync with the code in check_relocs. */
7659 r_type = ELF64_R_TYPE (r_info);
7660 switch (r_type)
7661 {
7662 default:
7663 return TRUE;
7664
7665 case R_PPC64_TPREL16:
7666 case R_PPC64_TPREL16_LO:
7667 case R_PPC64_TPREL16_HI:
7668 case R_PPC64_TPREL16_HA:
7669 case R_PPC64_TPREL16_DS:
7670 case R_PPC64_TPREL16_LO_DS:
7671 case R_PPC64_TPREL16_HIGH:
7672 case R_PPC64_TPREL16_HIGHA:
7673 case R_PPC64_TPREL16_HIGHER:
7674 case R_PPC64_TPREL16_HIGHERA:
7675 case R_PPC64_TPREL16_HIGHEST:
7676 case R_PPC64_TPREL16_HIGHESTA:
7677 case R_PPC64_TPREL64:
7678 case R_PPC64_DTPMOD64:
7679 case R_PPC64_DTPREL64:
7680 case R_PPC64_ADDR64:
7681 case R_PPC64_REL30:
7682 case R_PPC64_REL32:
7683 case R_PPC64_REL64:
7684 case R_PPC64_ADDR14:
7685 case R_PPC64_ADDR14_BRNTAKEN:
7686 case R_PPC64_ADDR14_BRTAKEN:
7687 case R_PPC64_ADDR16:
7688 case R_PPC64_ADDR16_DS:
7689 case R_PPC64_ADDR16_HA:
7690 case R_PPC64_ADDR16_HI:
7691 case R_PPC64_ADDR16_HIGH:
7692 case R_PPC64_ADDR16_HIGHA:
7693 case R_PPC64_ADDR16_HIGHER:
7694 case R_PPC64_ADDR16_HIGHERA:
7695 case R_PPC64_ADDR16_HIGHEST:
7696 case R_PPC64_ADDR16_HIGHESTA:
7697 case R_PPC64_ADDR16_LO:
7698 case R_PPC64_ADDR16_LO_DS:
7699 case R_PPC64_ADDR24:
7700 case R_PPC64_ADDR32:
7701 case R_PPC64_UADDR16:
7702 case R_PPC64_UADDR32:
7703 case R_PPC64_UADDR64:
7704 case R_PPC64_TOC:
7705 break;
7706 }
7707
7708 if (local_syms != NULL)
7709 {
7710 unsigned long r_symndx;
7711 bfd *ibfd = sec->owner;
7712
7713 r_symndx = ELF64_R_SYM (r_info);
7714 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
7715 return FALSE;
7716 }
7717
7718 if ((bfd_link_pic (info)
7719 && (must_be_dyn_reloc (info, r_type)
7720 || (h != NULL
7721 && (!SYMBOLIC_BIND (info, h)
7722 || h->root.type == bfd_link_hash_defweak
7723 || !h->def_regular))))
7724 || (ELIMINATE_COPY_RELOCS
7725 && !bfd_link_pic (info)
7726 && h != NULL
7727 && (h->root.type == bfd_link_hash_defweak
7728 || !h->def_regular)))
7729 ;
7730 else
7731 return TRUE;
7732
7733 if (h != NULL)
7734 {
7735 struct elf_dyn_relocs *p;
7736 struct elf_dyn_relocs **pp;
7737 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
7738
7739 /* elf_gc_sweep may have already removed all dyn relocs associated
7740 with local syms for a given section. Also, symbol flags are
7741 changed by elf_gc_sweep_symbol, confusing the test above. Don't
7742 report a dynreloc miscount. */
7743 if (*pp == NULL && info->gc_sections)
7744 return TRUE;
7745
7746 while ((p = *pp) != NULL)
7747 {
7748 if (p->sec == sec)
7749 {
7750 if (!must_be_dyn_reloc (info, r_type))
7751 p->pc_count -= 1;
7752 p->count -= 1;
7753 if (p->count == 0)
7754 *pp = p->next;
7755 return TRUE;
7756 }
7757 pp = &p->next;
7758 }
7759 }
7760 else
7761 {
7762 struct ppc_dyn_relocs *p;
7763 struct ppc_dyn_relocs **pp;
7764 void *vpp;
7765 bfd_boolean is_ifunc;
7766
7767 if (local_syms == NULL)
7768 sym_sec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
7769 if (sym_sec == NULL)
7770 sym_sec = sec;
7771
7772 vpp = &elf_section_data (sym_sec)->local_dynrel;
7773 pp = (struct ppc_dyn_relocs **) vpp;
7774
7775 if (*pp == NULL && info->gc_sections)
7776 return TRUE;
7777
7778 is_ifunc = ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC;
7779 while ((p = *pp) != NULL)
7780 {
7781 if (p->sec == sec && p->ifunc == is_ifunc)
7782 {
7783 p->count -= 1;
7784 if (p->count == 0)
7785 *pp = p->next;
7786 return TRUE;
7787 }
7788 pp = &p->next;
7789 }
7790 }
7791
7792 /* xgettext:c-format */
7793 info->callbacks->einfo (_("%P: dynreloc miscount for %B, section %A\n"),
7794 sec->owner, sec);
7795 bfd_set_error (bfd_error_bad_value);
7796 return FALSE;
7797 }
7798
7799 /* Remove unused Official Procedure Descriptor entries. Currently we
7800 only remove those associated with functions in discarded link-once
7801 sections, or weakly defined functions that have been overridden. It
7802 would be possible to remove many more entries for statically linked
7803 applications. */
7804
7805 bfd_boolean
7806 ppc64_elf_edit_opd (struct bfd_link_info *info)
7807 {
7808 bfd *ibfd;
7809 bfd_boolean some_edited = FALSE;
7810 asection *need_pad = NULL;
7811 struct ppc_link_hash_table *htab;
7812
7813 htab = ppc_hash_table (info);
7814 if (htab == NULL)
7815 return FALSE;
7816
7817 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
7818 {
7819 asection *sec;
7820 Elf_Internal_Rela *relstart, *rel, *relend;
7821 Elf_Internal_Shdr *symtab_hdr;
7822 Elf_Internal_Sym *local_syms;
7823 struct _opd_sec_data *opd;
7824 bfd_boolean need_edit, add_aux_fields, broken;
7825 bfd_size_type cnt_16b = 0;
7826
7827 if (!is_ppc64_elf (ibfd))
7828 continue;
7829
7830 sec = bfd_get_section_by_name (ibfd, ".opd");
7831 if (sec == NULL || sec->size == 0)
7832 continue;
7833
7834 if (sec->sec_info_type == SEC_INFO_TYPE_JUST_SYMS)
7835 continue;
7836
7837 if (sec->output_section == bfd_abs_section_ptr)
7838 continue;
7839
7840 /* Look through the section relocs. */
7841 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
7842 continue;
7843
7844 local_syms = NULL;
7845 symtab_hdr = &elf_symtab_hdr (ibfd);
7846
7847 /* Read the relocations. */
7848 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7849 info->keep_memory);
7850 if (relstart == NULL)
7851 return FALSE;
7852
7853 /* First run through the relocs to check they are sane, and to
7854 determine whether we need to edit this opd section. */
7855 need_edit = FALSE;
7856 broken = FALSE;
7857 need_pad = sec;
7858 relend = relstart + sec->reloc_count;
7859 for (rel = relstart; rel < relend; )
7860 {
7861 enum elf_ppc64_reloc_type r_type;
7862 unsigned long r_symndx;
7863 asection *sym_sec;
7864 struct elf_link_hash_entry *h;
7865 Elf_Internal_Sym *sym;
7866 bfd_vma offset;
7867
7868 /* .opd contains an array of 16 or 24 byte entries. We're
7869 only interested in the reloc pointing to a function entry
7870 point. */
7871 offset = rel->r_offset;
7872 if (rel + 1 == relend
7873 || rel[1].r_offset != offset + 8)
7874 {
7875 /* If someone messes with .opd alignment then after a
7876 "ld -r" we might have padding in the middle of .opd.
7877 Also, there's nothing to prevent someone putting
7878 something silly in .opd with the assembler. No .opd
7879 optimization for them! */
7880 broken_opd:
7881 _bfd_error_handler
7882 (_("%B: .opd is not a regular array of opd entries"), ibfd);
7883 broken = TRUE;
7884 break;
7885 }
7886
7887 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
7888 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
7889 {
7890 _bfd_error_handler
7891 /* xgettext:c-format */
7892 (_("%B: unexpected reloc type %u in .opd section"),
7893 ibfd, r_type);
7894 broken = TRUE;
7895 break;
7896 }
7897
7898 r_symndx = ELF64_R_SYM (rel->r_info);
7899 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7900 r_symndx, ibfd))
7901 goto error_ret;
7902
7903 if (sym_sec == NULL || sym_sec->owner == NULL)
7904 {
7905 const char *sym_name;
7906 if (h != NULL)
7907 sym_name = h->root.root.string;
7908 else
7909 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
7910 sym_sec);
7911
7912 _bfd_error_handler
7913 /* xgettext:c-format */
7914 (_("%B: undefined sym `%s' in .opd section"),
7915 ibfd, sym_name);
7916 broken = TRUE;
7917 break;
7918 }
7919
7920 /* opd entries are always for functions defined in the
7921 current input bfd. If the symbol isn't defined in the
7922 input bfd, then we won't be using the function in this
7923 bfd; It must be defined in a linkonce section in another
7924 bfd, or is weak. It's also possible that we are
7925 discarding the function due to a linker script /DISCARD/,
7926 which we test for via the output_section. */
7927 if (sym_sec->owner != ibfd
7928 || sym_sec->output_section == bfd_abs_section_ptr)
7929 need_edit = TRUE;
7930
7931 rel += 2;
7932 if (rel + 1 == relend
7933 || (rel + 2 < relend
7934 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC))
7935 ++rel;
7936
7937 if (rel == relend)
7938 {
7939 if (sec->size == offset + 24)
7940 {
7941 need_pad = NULL;
7942 break;
7943 }
7944 if (sec->size == offset + 16)
7945 {
7946 cnt_16b++;
7947 break;
7948 }
7949 goto broken_opd;
7950 }
7951 else if (rel + 1 < relend
7952 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
7953 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
7954 {
7955 if (rel[0].r_offset == offset + 16)
7956 cnt_16b++;
7957 else if (rel[0].r_offset != offset + 24)
7958 goto broken_opd;
7959 }
7960 else
7961 goto broken_opd;
7962 }
7963
7964 add_aux_fields = htab->params->non_overlapping_opd && cnt_16b > 0;
7965
7966 if (!broken && (need_edit || add_aux_fields))
7967 {
7968 Elf_Internal_Rela *write_rel;
7969 Elf_Internal_Shdr *rel_hdr;
7970 bfd_byte *rptr, *wptr;
7971 bfd_byte *new_contents;
7972 bfd_size_type amt;
7973
7974 new_contents = NULL;
7975 amt = OPD_NDX (sec->size) * sizeof (long);
7976 opd = &ppc64_elf_section_data (sec)->u.opd;
7977 opd->adjust = bfd_zalloc (sec->owner, amt);
7978 if (opd->adjust == NULL)
7979 return FALSE;
7980
7981 /* This seems a waste of time as input .opd sections are all
7982 zeros as generated by gcc, but I suppose there's no reason
7983 this will always be so. We might start putting something in
7984 the third word of .opd entries. */
7985 if ((sec->flags & SEC_IN_MEMORY) == 0)
7986 {
7987 bfd_byte *loc;
7988 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
7989 {
7990 if (loc != NULL)
7991 free (loc);
7992 error_ret:
7993 if (local_syms != NULL
7994 && symtab_hdr->contents != (unsigned char *) local_syms)
7995 free (local_syms);
7996 if (elf_section_data (sec)->relocs != relstart)
7997 free (relstart);
7998 return FALSE;
7999 }
8000 sec->contents = loc;
8001 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
8002 }
8003
8004 elf_section_data (sec)->relocs = relstart;
8005
8006 new_contents = sec->contents;
8007 if (add_aux_fields)
8008 {
8009 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
8010 if (new_contents == NULL)
8011 return FALSE;
8012 need_pad = NULL;
8013 }
8014 wptr = new_contents;
8015 rptr = sec->contents;
8016 write_rel = relstart;
8017 for (rel = relstart; rel < relend; )
8018 {
8019 unsigned long r_symndx;
8020 asection *sym_sec;
8021 struct elf_link_hash_entry *h;
8022 struct ppc_link_hash_entry *fdh = NULL;
8023 Elf_Internal_Sym *sym;
8024 long opd_ent_size;
8025 Elf_Internal_Rela *next_rel;
8026 bfd_boolean skip;
8027
8028 r_symndx = ELF64_R_SYM (rel->r_info);
8029 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8030 r_symndx, ibfd))
8031 goto error_ret;
8032
8033 next_rel = rel + 2;
8034 if (next_rel + 1 == relend
8035 || (next_rel + 2 < relend
8036 && ELF64_R_TYPE (next_rel[2].r_info) == R_PPC64_TOC))
8037 ++next_rel;
8038
8039 /* See if the .opd entry is full 24 byte or
8040 16 byte (with fd_aux entry overlapped with next
8041 fd_func). */
8042 opd_ent_size = 24;
8043 if (next_rel == relend)
8044 {
8045 if (sec->size == rel->r_offset + 16)
8046 opd_ent_size = 16;
8047 }
8048 else if (next_rel->r_offset == rel->r_offset + 16)
8049 opd_ent_size = 16;
8050
8051 if (h != NULL
8052 && h->root.root.string[0] == '.')
8053 {
8054 fdh = ((struct ppc_link_hash_entry *) h)->oh;
8055 if (fdh != NULL)
8056 {
8057 fdh = ppc_follow_link (fdh);
8058 if (fdh->elf.root.type != bfd_link_hash_defined
8059 && fdh->elf.root.type != bfd_link_hash_defweak)
8060 fdh = NULL;
8061 }
8062 }
8063
8064 skip = (sym_sec->owner != ibfd
8065 || sym_sec->output_section == bfd_abs_section_ptr);
8066 if (skip)
8067 {
8068 if (fdh != NULL && sym_sec->owner == ibfd)
8069 {
8070 /* Arrange for the function descriptor sym
8071 to be dropped. */
8072 fdh->elf.root.u.def.value = 0;
8073 fdh->elf.root.u.def.section = sym_sec;
8074 }
8075 opd->adjust[OPD_NDX (rel->r_offset)] = -1;
8076
8077 if (NO_OPD_RELOCS || bfd_link_relocatable (info))
8078 rel = next_rel;
8079 else
8080 while (1)
8081 {
8082 if (!dec_dynrel_count (rel->r_info, sec, info,
8083 NULL, h, sym))
8084 goto error_ret;
8085
8086 if (++rel == next_rel)
8087 break;
8088
8089 r_symndx = ELF64_R_SYM (rel->r_info);
8090 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8091 r_symndx, ibfd))
8092 goto error_ret;
8093 }
8094 }
8095 else
8096 {
8097 /* We'll be keeping this opd entry. */
8098 long adjust;
8099
8100 if (fdh != NULL)
8101 {
8102 /* Redefine the function descriptor symbol to
8103 this location in the opd section. It is
8104 necessary to update the value here rather
8105 than using an array of adjustments as we do
8106 for local symbols, because various places
8107 in the generic ELF code use the value
8108 stored in u.def.value. */
8109 fdh->elf.root.u.def.value = wptr - new_contents;
8110 fdh->adjust_done = 1;
8111 }
8112
8113 /* Local syms are a bit tricky. We could
8114 tweak them as they can be cached, but
8115 we'd need to look through the local syms
8116 for the function descriptor sym which we
8117 don't have at the moment. So keep an
8118 array of adjustments. */
8119 adjust = (wptr - new_contents) - (rptr - sec->contents);
8120 opd->adjust[OPD_NDX (rel->r_offset)] = adjust;
8121
8122 if (wptr != rptr)
8123 memcpy (wptr, rptr, opd_ent_size);
8124 wptr += opd_ent_size;
8125 if (add_aux_fields && opd_ent_size == 16)
8126 {
8127 memset (wptr, '\0', 8);
8128 wptr += 8;
8129 }
8130
8131 /* We need to adjust any reloc offsets to point to the
8132 new opd entries. */
8133 for ( ; rel != next_rel; ++rel)
8134 {
8135 rel->r_offset += adjust;
8136 if (write_rel != rel)
8137 memcpy (write_rel, rel, sizeof (*rel));
8138 ++write_rel;
8139 }
8140 }
8141
8142 rptr += opd_ent_size;
8143 }
8144
8145 sec->size = wptr - new_contents;
8146 sec->reloc_count = write_rel - relstart;
8147 if (add_aux_fields)
8148 {
8149 free (sec->contents);
8150 sec->contents = new_contents;
8151 }
8152
8153 /* Fudge the header size too, as this is used later in
8154 elf_bfd_final_link if we are emitting relocs. */
8155 rel_hdr = _bfd_elf_single_rel_hdr (sec);
8156 rel_hdr->sh_size = sec->reloc_count * rel_hdr->sh_entsize;
8157 some_edited = TRUE;
8158 }
8159 else if (elf_section_data (sec)->relocs != relstart)
8160 free (relstart);
8161
8162 if (local_syms != NULL
8163 && symtab_hdr->contents != (unsigned char *) local_syms)
8164 {
8165 if (!info->keep_memory)
8166 free (local_syms);
8167 else
8168 symtab_hdr->contents = (unsigned char *) local_syms;
8169 }
8170 }
8171
8172 if (some_edited)
8173 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
8174
8175 /* If we are doing a final link and the last .opd entry is just 16 byte
8176 long, add a 8 byte padding after it. */
8177 if (need_pad != NULL && !bfd_link_relocatable (info))
8178 {
8179 bfd_byte *p;
8180
8181 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
8182 {
8183 BFD_ASSERT (need_pad->size > 0);
8184
8185 p = bfd_malloc (need_pad->size + 8);
8186 if (p == NULL)
8187 return FALSE;
8188
8189 if (! bfd_get_section_contents (need_pad->owner, need_pad,
8190 p, 0, need_pad->size))
8191 return FALSE;
8192
8193 need_pad->contents = p;
8194 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
8195 }
8196 else
8197 {
8198 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
8199 if (p == NULL)
8200 return FALSE;
8201
8202 need_pad->contents = p;
8203 }
8204
8205 memset (need_pad->contents + need_pad->size, 0, 8);
8206 need_pad->size += 8;
8207 }
8208
8209 return TRUE;
8210 }
8211
8212 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
8213
8214 asection *
8215 ppc64_elf_tls_setup (struct bfd_link_info *info)
8216 {
8217 struct ppc_link_hash_table *htab;
8218
8219 htab = ppc_hash_table (info);
8220 if (htab == NULL)
8221 return NULL;
8222
8223 if (abiversion (info->output_bfd) == 1)
8224 htab->opd_abi = 1;
8225
8226 if (htab->params->no_multi_toc)
8227 htab->do_multi_toc = 0;
8228 else if (!htab->do_multi_toc)
8229 htab->params->no_multi_toc = 1;
8230
8231 /* Default to --no-plt-localentry, as this option can cause problems
8232 with symbol interposition. For example, glibc libpthread.so and
8233 libc.so duplicate many pthread symbols, with a fallback
8234 implementation in libc.so. In some cases the fallback does more
8235 work than the pthread implementation. __pthread_condattr_destroy
8236 is one such symbol: the libpthread.so implementation is
8237 localentry:0 while the libc.so implementation is localentry:8.
8238 An app that "cleverly" uses dlopen to only load necessary
8239 libraries at runtime may omit loading libpthread.so when not
8240 running multi-threaded, which then results in the libc.so
8241 fallback symbols being used and ld.so complaining. Now there
8242 are workarounds in ld (see non_zero_localentry) to detect the
8243 pthread situation, but that may not be the only case where
8244 --plt-localentry can cause trouble. */
8245 if (htab->params->plt_localentry0 < 0)
8246 htab->params->plt_localentry0 = 0;
8247 if (htab->params->plt_localentry0
8248 && elf_link_hash_lookup (&htab->elf, "GLIBC_2.26",
8249 FALSE, FALSE, FALSE) == NULL)
8250 info->callbacks->einfo
8251 (_("%P: warning: --plt-localentry is especially dangerous without "
8252 "ld.so support to detect ABI violations.\n"));
8253
8254 htab->tls_get_addr = ((struct ppc_link_hash_entry *)
8255 elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
8256 FALSE, FALSE, TRUE));
8257 /* Move dynamic linking info to the function descriptor sym. */
8258 if (htab->tls_get_addr != NULL)
8259 func_desc_adjust (&htab->tls_get_addr->elf, info);
8260 htab->tls_get_addr_fd = ((struct ppc_link_hash_entry *)
8261 elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
8262 FALSE, FALSE, TRUE));
8263 if (htab->params->tls_get_addr_opt)
8264 {
8265 struct elf_link_hash_entry *opt, *opt_fd, *tga, *tga_fd;
8266
8267 opt = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr_opt",
8268 FALSE, FALSE, TRUE);
8269 if (opt != NULL)
8270 func_desc_adjust (opt, info);
8271 opt_fd = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
8272 FALSE, FALSE, TRUE);
8273 if (opt_fd != NULL
8274 && (opt_fd->root.type == bfd_link_hash_defined
8275 || opt_fd->root.type == bfd_link_hash_defweak))
8276 {
8277 /* If glibc supports an optimized __tls_get_addr call stub,
8278 signalled by the presence of __tls_get_addr_opt, and we'll
8279 be calling __tls_get_addr via a plt call stub, then
8280 make __tls_get_addr point to __tls_get_addr_opt. */
8281 tga_fd = &htab->tls_get_addr_fd->elf;
8282 if (htab->elf.dynamic_sections_created
8283 && tga_fd != NULL
8284 && (tga_fd->type == STT_FUNC
8285 || tga_fd->needs_plt)
8286 && !(SYMBOL_CALLS_LOCAL (info, tga_fd)
8287 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, tga_fd)))
8288 {
8289 struct plt_entry *ent;
8290
8291 for (ent = tga_fd->plt.plist; ent != NULL; ent = ent->next)
8292 if (ent->plt.refcount > 0)
8293 break;
8294 if (ent != NULL)
8295 {
8296 tga_fd->root.type = bfd_link_hash_indirect;
8297 tga_fd->root.u.i.link = &opt_fd->root;
8298 ppc64_elf_copy_indirect_symbol (info, opt_fd, tga_fd);
8299 opt_fd->mark = 1;
8300 if (opt_fd->dynindx != -1)
8301 {
8302 /* Use __tls_get_addr_opt in dynamic relocations. */
8303 opt_fd->dynindx = -1;
8304 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
8305 opt_fd->dynstr_index);
8306 if (!bfd_elf_link_record_dynamic_symbol (info, opt_fd))
8307 return NULL;
8308 }
8309 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) opt_fd;
8310 tga = &htab->tls_get_addr->elf;
8311 if (opt != NULL && tga != NULL)
8312 {
8313 tga->root.type = bfd_link_hash_indirect;
8314 tga->root.u.i.link = &opt->root;
8315 ppc64_elf_copy_indirect_symbol (info, opt, tga);
8316 opt->mark = 1;
8317 _bfd_elf_link_hash_hide_symbol (info, opt,
8318 tga->forced_local);
8319 htab->tls_get_addr = (struct ppc_link_hash_entry *) opt;
8320 }
8321 htab->tls_get_addr_fd->oh = htab->tls_get_addr;
8322 htab->tls_get_addr_fd->is_func_descriptor = 1;
8323 if (htab->tls_get_addr != NULL)
8324 {
8325 htab->tls_get_addr->oh = htab->tls_get_addr_fd;
8326 htab->tls_get_addr->is_func = 1;
8327 }
8328 }
8329 }
8330 }
8331 else if (htab->params->tls_get_addr_opt < 0)
8332 htab->params->tls_get_addr_opt = 0;
8333 }
8334 return _bfd_elf_tls_setup (info->output_bfd, info);
8335 }
8336
8337 /* Return TRUE iff REL is a branch reloc with a global symbol matching
8338 HASH1 or HASH2. */
8339
8340 static bfd_boolean
8341 branch_reloc_hash_match (const bfd *ibfd,
8342 const Elf_Internal_Rela *rel,
8343 const struct ppc_link_hash_entry *hash1,
8344 const struct ppc_link_hash_entry *hash2)
8345 {
8346 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
8347 enum elf_ppc64_reloc_type r_type = ELF64_R_TYPE (rel->r_info);
8348 unsigned int r_symndx = ELF64_R_SYM (rel->r_info);
8349
8350 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
8351 {
8352 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
8353 struct elf_link_hash_entry *h;
8354
8355 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
8356 h = elf_follow_link (h);
8357 if (h == &hash1->elf || h == &hash2->elf)
8358 return TRUE;
8359 }
8360 return FALSE;
8361 }
8362
8363 /* Run through all the TLS relocs looking for optimization
8364 opportunities. The linker has been hacked (see ppc64elf.em) to do
8365 a preliminary section layout so that we know the TLS segment
8366 offsets. We can't optimize earlier because some optimizations need
8367 to know the tp offset, and we need to optimize before allocating
8368 dynamic relocations. */
8369
8370 bfd_boolean
8371 ppc64_elf_tls_optimize (struct bfd_link_info *info)
8372 {
8373 bfd *ibfd;
8374 asection *sec;
8375 struct ppc_link_hash_table *htab;
8376 unsigned char *toc_ref;
8377 int pass;
8378
8379 if (!bfd_link_executable (info))
8380 return TRUE;
8381
8382 htab = ppc_hash_table (info);
8383 if (htab == NULL)
8384 return FALSE;
8385
8386 /* Make two passes over the relocs. On the first pass, mark toc
8387 entries involved with tls relocs, and check that tls relocs
8388 involved in setting up a tls_get_addr call are indeed followed by
8389 such a call. If they are not, we can't do any tls optimization.
8390 On the second pass twiddle tls_mask flags to notify
8391 relocate_section that optimization can be done, and adjust got
8392 and plt refcounts. */
8393 toc_ref = NULL;
8394 for (pass = 0; pass < 2; ++pass)
8395 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
8396 {
8397 Elf_Internal_Sym *locsyms = NULL;
8398 asection *toc = bfd_get_section_by_name (ibfd, ".toc");
8399
8400 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8401 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
8402 {
8403 Elf_Internal_Rela *relstart, *rel, *relend;
8404 bfd_boolean found_tls_get_addr_arg = 0;
8405
8406 /* Read the relocations. */
8407 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8408 info->keep_memory);
8409 if (relstart == NULL)
8410 {
8411 free (toc_ref);
8412 return FALSE;
8413 }
8414
8415 relend = relstart + sec->reloc_count;
8416 for (rel = relstart; rel < relend; rel++)
8417 {
8418 enum elf_ppc64_reloc_type r_type;
8419 unsigned long r_symndx;
8420 struct elf_link_hash_entry *h;
8421 Elf_Internal_Sym *sym;
8422 asection *sym_sec;
8423 unsigned char *tls_mask;
8424 unsigned char tls_set, tls_clear, tls_type = 0;
8425 bfd_vma value;
8426 bfd_boolean ok_tprel, is_local;
8427 long toc_ref_index = 0;
8428 int expecting_tls_get_addr = 0;
8429 bfd_boolean ret = FALSE;
8430
8431 r_symndx = ELF64_R_SYM (rel->r_info);
8432 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
8433 r_symndx, ibfd))
8434 {
8435 err_free_rel:
8436 if (elf_section_data (sec)->relocs != relstart)
8437 free (relstart);
8438 if (toc_ref != NULL)
8439 free (toc_ref);
8440 if (locsyms != NULL
8441 && (elf_symtab_hdr (ibfd).contents
8442 != (unsigned char *) locsyms))
8443 free (locsyms);
8444 return ret;
8445 }
8446
8447 if (h != NULL)
8448 {
8449 if (h->root.type == bfd_link_hash_defined
8450 || h->root.type == bfd_link_hash_defweak)
8451 value = h->root.u.def.value;
8452 else if (h->root.type == bfd_link_hash_undefweak)
8453 value = 0;
8454 else
8455 {
8456 found_tls_get_addr_arg = 0;
8457 continue;
8458 }
8459 }
8460 else
8461 /* Symbols referenced by TLS relocs must be of type
8462 STT_TLS. So no need for .opd local sym adjust. */
8463 value = sym->st_value;
8464
8465 ok_tprel = FALSE;
8466 is_local = FALSE;
8467 if (h == NULL
8468 || !h->def_dynamic)
8469 {
8470 is_local = TRUE;
8471 if (h != NULL
8472 && h->root.type == bfd_link_hash_undefweak)
8473 ok_tprel = TRUE;
8474 else if (sym_sec != NULL
8475 && sym_sec->output_section != NULL)
8476 {
8477 value += sym_sec->output_offset;
8478 value += sym_sec->output_section->vma;
8479 value -= htab->elf.tls_sec->vma;
8480 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
8481 < (bfd_vma) 1 << 32);
8482 }
8483 }
8484
8485 r_type = ELF64_R_TYPE (rel->r_info);
8486 /* If this section has old-style __tls_get_addr calls
8487 without marker relocs, then check that each
8488 __tls_get_addr call reloc is preceded by a reloc
8489 that conceivably belongs to the __tls_get_addr arg
8490 setup insn. If we don't find matching arg setup
8491 relocs, don't do any tls optimization. */
8492 if (pass == 0
8493 && sec->has_tls_get_addr_call
8494 && h != NULL
8495 && (h == &htab->tls_get_addr->elf
8496 || h == &htab->tls_get_addr_fd->elf)
8497 && !found_tls_get_addr_arg
8498 && is_branch_reloc (r_type))
8499 {
8500 info->callbacks->minfo (_("%H __tls_get_addr lost arg, "
8501 "TLS optimization disabled\n"),
8502 ibfd, sec, rel->r_offset);
8503 ret = TRUE;
8504 goto err_free_rel;
8505 }
8506
8507 found_tls_get_addr_arg = 0;
8508 switch (r_type)
8509 {
8510 case R_PPC64_GOT_TLSLD16:
8511 case R_PPC64_GOT_TLSLD16_LO:
8512 expecting_tls_get_addr = 1;
8513 found_tls_get_addr_arg = 1;
8514 /* Fall through. */
8515
8516 case R_PPC64_GOT_TLSLD16_HI:
8517 case R_PPC64_GOT_TLSLD16_HA:
8518 /* These relocs should never be against a symbol
8519 defined in a shared lib. Leave them alone if
8520 that turns out to be the case. */
8521 if (!is_local)
8522 continue;
8523
8524 /* LD -> LE */
8525 tls_set = 0;
8526 tls_clear = TLS_LD;
8527 tls_type = TLS_TLS | TLS_LD;
8528 break;
8529
8530 case R_PPC64_GOT_TLSGD16:
8531 case R_PPC64_GOT_TLSGD16_LO:
8532 expecting_tls_get_addr = 1;
8533 found_tls_get_addr_arg = 1;
8534 /* Fall through. */
8535
8536 case R_PPC64_GOT_TLSGD16_HI:
8537 case R_PPC64_GOT_TLSGD16_HA:
8538 if (ok_tprel)
8539 /* GD -> LE */
8540 tls_set = 0;
8541 else
8542 /* GD -> IE */
8543 tls_set = TLS_TLS | TLS_TPRELGD;
8544 tls_clear = TLS_GD;
8545 tls_type = TLS_TLS | TLS_GD;
8546 break;
8547
8548 case R_PPC64_GOT_TPREL16_DS:
8549 case R_PPC64_GOT_TPREL16_LO_DS:
8550 case R_PPC64_GOT_TPREL16_HI:
8551 case R_PPC64_GOT_TPREL16_HA:
8552 if (ok_tprel)
8553 {
8554 /* IE -> LE */
8555 tls_set = 0;
8556 tls_clear = TLS_TPREL;
8557 tls_type = TLS_TLS | TLS_TPREL;
8558 break;
8559 }
8560 continue;
8561
8562 case R_PPC64_TLSGD:
8563 case R_PPC64_TLSLD:
8564 found_tls_get_addr_arg = 1;
8565 /* Fall through. */
8566
8567 case R_PPC64_TLS:
8568 case R_PPC64_TOC16:
8569 case R_PPC64_TOC16_LO:
8570 if (sym_sec == NULL || sym_sec != toc)
8571 continue;
8572
8573 /* Mark this toc entry as referenced by a TLS
8574 code sequence. We can do that now in the
8575 case of R_PPC64_TLS, and after checking for
8576 tls_get_addr for the TOC16 relocs. */
8577 if (toc_ref == NULL)
8578 toc_ref = bfd_zmalloc (toc->output_section->rawsize / 8);
8579 if (toc_ref == NULL)
8580 goto err_free_rel;
8581
8582 if (h != NULL)
8583 value = h->root.u.def.value;
8584 else
8585 value = sym->st_value;
8586 value += rel->r_addend;
8587 if (value % 8 != 0)
8588 continue;
8589 BFD_ASSERT (value < toc->size
8590 && toc->output_offset % 8 == 0);
8591 toc_ref_index = (value + toc->output_offset) / 8;
8592 if (r_type == R_PPC64_TLS
8593 || r_type == R_PPC64_TLSGD
8594 || r_type == R_PPC64_TLSLD)
8595 {
8596 toc_ref[toc_ref_index] = 1;
8597 continue;
8598 }
8599
8600 if (pass != 0 && toc_ref[toc_ref_index] == 0)
8601 continue;
8602
8603 tls_set = 0;
8604 tls_clear = 0;
8605 expecting_tls_get_addr = 2;
8606 break;
8607
8608 case R_PPC64_TPREL64:
8609 if (pass == 0
8610 || sec != toc
8611 || toc_ref == NULL
8612 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
8613 continue;
8614 if (ok_tprel)
8615 {
8616 /* IE -> LE */
8617 tls_set = TLS_EXPLICIT;
8618 tls_clear = TLS_TPREL;
8619 break;
8620 }
8621 continue;
8622
8623 case R_PPC64_DTPMOD64:
8624 if (pass == 0
8625 || sec != toc
8626 || toc_ref == NULL
8627 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
8628 continue;
8629 if (rel + 1 < relend
8630 && (rel[1].r_info
8631 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
8632 && rel[1].r_offset == rel->r_offset + 8)
8633 {
8634 if (ok_tprel)
8635 /* GD -> LE */
8636 tls_set = TLS_EXPLICIT | TLS_GD;
8637 else
8638 /* GD -> IE */
8639 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
8640 tls_clear = TLS_GD;
8641 }
8642 else
8643 {
8644 if (!is_local)
8645 continue;
8646
8647 /* LD -> LE */
8648 tls_set = TLS_EXPLICIT;
8649 tls_clear = TLS_LD;
8650 }
8651 break;
8652
8653 default:
8654 continue;
8655 }
8656
8657 if (pass == 0)
8658 {
8659 if (!expecting_tls_get_addr
8660 || !sec->has_tls_get_addr_call)
8661 continue;
8662
8663 if (rel + 1 < relend
8664 && branch_reloc_hash_match (ibfd, rel + 1,
8665 htab->tls_get_addr,
8666 htab->tls_get_addr_fd))
8667 {
8668 if (expecting_tls_get_addr == 2)
8669 {
8670 /* Check for toc tls entries. */
8671 unsigned char *toc_tls;
8672 int retval;
8673
8674 retval = get_tls_mask (&toc_tls, NULL, NULL,
8675 &locsyms,
8676 rel, ibfd);
8677 if (retval == 0)
8678 goto err_free_rel;
8679 if (toc_tls != NULL)
8680 {
8681 if ((*toc_tls & (TLS_GD | TLS_LD)) != 0)
8682 found_tls_get_addr_arg = 1;
8683 if (retval > 1)
8684 toc_ref[toc_ref_index] = 1;
8685 }
8686 }
8687 continue;
8688 }
8689
8690 if (expecting_tls_get_addr != 1)
8691 continue;
8692
8693 /* Uh oh, we didn't find the expected call. We
8694 could just mark this symbol to exclude it
8695 from tls optimization but it's safer to skip
8696 the entire optimization. */
8697 /* xgettext:c-format */
8698 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
8699 "TLS optimization disabled\n"),
8700 ibfd, sec, rel->r_offset);
8701 ret = TRUE;
8702 goto err_free_rel;
8703 }
8704
8705 if (expecting_tls_get_addr && htab->tls_get_addr != NULL)
8706 {
8707 struct plt_entry *ent;
8708 for (ent = htab->tls_get_addr->elf.plt.plist;
8709 ent != NULL;
8710 ent = ent->next)
8711 if (ent->addend == 0)
8712 {
8713 if (ent->plt.refcount > 0)
8714 {
8715 ent->plt.refcount -= 1;
8716 expecting_tls_get_addr = 0;
8717 }
8718 break;
8719 }
8720 }
8721
8722 if (expecting_tls_get_addr && htab->tls_get_addr_fd != NULL)
8723 {
8724 struct plt_entry *ent;
8725 for (ent = htab->tls_get_addr_fd->elf.plt.plist;
8726 ent != NULL;
8727 ent = ent->next)
8728 if (ent->addend == 0)
8729 {
8730 if (ent->plt.refcount > 0)
8731 ent->plt.refcount -= 1;
8732 break;
8733 }
8734 }
8735
8736 if (tls_clear == 0)
8737 continue;
8738
8739 if ((tls_set & TLS_EXPLICIT) == 0)
8740 {
8741 struct got_entry *ent;
8742
8743 /* Adjust got entry for this reloc. */
8744 if (h != NULL)
8745 ent = h->got.glist;
8746 else
8747 ent = elf_local_got_ents (ibfd)[r_symndx];
8748
8749 for (; ent != NULL; ent = ent->next)
8750 if (ent->addend == rel->r_addend
8751 && ent->owner == ibfd
8752 && ent->tls_type == tls_type)
8753 break;
8754 if (ent == NULL)
8755 abort ();
8756
8757 if (tls_set == 0)
8758 {
8759 /* We managed to get rid of a got entry. */
8760 if (ent->got.refcount > 0)
8761 ent->got.refcount -= 1;
8762 }
8763 }
8764 else
8765 {
8766 /* If we got rid of a DTPMOD/DTPREL reloc pair then
8767 we'll lose one or two dyn relocs. */
8768 if (!dec_dynrel_count (rel->r_info, sec, info,
8769 NULL, h, sym))
8770 return FALSE;
8771
8772 if (tls_set == (TLS_EXPLICIT | TLS_GD))
8773 {
8774 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
8775 NULL, h, sym))
8776 return FALSE;
8777 }
8778 }
8779
8780 *tls_mask |= tls_set;
8781 *tls_mask &= ~tls_clear;
8782 }
8783
8784 if (elf_section_data (sec)->relocs != relstart)
8785 free (relstart);
8786 }
8787
8788 if (locsyms != NULL
8789 && (elf_symtab_hdr (ibfd).contents != (unsigned char *) locsyms))
8790 {
8791 if (!info->keep_memory)
8792 free (locsyms);
8793 else
8794 elf_symtab_hdr (ibfd).contents = (unsigned char *) locsyms;
8795 }
8796 }
8797
8798 if (toc_ref != NULL)
8799 free (toc_ref);
8800 htab->do_tls_opt = 1;
8801 return TRUE;
8802 }
8803
8804 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
8805 the values of any global symbols in a toc section that has been
8806 edited. Globals in toc sections should be a rarity, so this function
8807 sets a flag if any are found in toc sections other than the one just
8808 edited, so that further hash table traversals can be avoided. */
8809
8810 struct adjust_toc_info
8811 {
8812 asection *toc;
8813 unsigned long *skip;
8814 bfd_boolean global_toc_syms;
8815 };
8816
8817 enum toc_skip_enum { ref_from_discarded = 1, can_optimize = 2 };
8818
8819 static bfd_boolean
8820 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
8821 {
8822 struct ppc_link_hash_entry *eh;
8823 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
8824 unsigned long i;
8825
8826 if (h->root.type != bfd_link_hash_defined
8827 && h->root.type != bfd_link_hash_defweak)
8828 return TRUE;
8829
8830 eh = (struct ppc_link_hash_entry *) h;
8831 if (eh->adjust_done)
8832 return TRUE;
8833
8834 if (eh->elf.root.u.def.section == toc_inf->toc)
8835 {
8836 if (eh->elf.root.u.def.value > toc_inf->toc->rawsize)
8837 i = toc_inf->toc->rawsize >> 3;
8838 else
8839 i = eh->elf.root.u.def.value >> 3;
8840
8841 if ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0)
8842 {
8843 _bfd_error_handler
8844 (_("%s defined on removed toc entry"), eh->elf.root.root.string);
8845 do
8846 ++i;
8847 while ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0);
8848 eh->elf.root.u.def.value = (bfd_vma) i << 3;
8849 }
8850
8851 eh->elf.root.u.def.value -= toc_inf->skip[i];
8852 eh->adjust_done = 1;
8853 }
8854 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
8855 toc_inf->global_toc_syms = TRUE;
8856
8857 return TRUE;
8858 }
8859
8860 /* Return TRUE iff INSN with a relocation of R_TYPE is one we expect
8861 on a _LO variety toc/got reloc. */
8862
8863 static bfd_boolean
8864 ok_lo_toc_insn (unsigned int insn, enum elf_ppc64_reloc_type r_type)
8865 {
8866 return ((insn & (0x3f << 26)) == 12u << 26 /* addic */
8867 || (insn & (0x3f << 26)) == 14u << 26 /* addi */
8868 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
8869 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
8870 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
8871 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
8872 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
8873 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
8874 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
8875 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
8876 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
8877 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
8878 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
8879 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
8880 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
8881 || (insn & (0x3f << 26)) == 56u << 26 /* lq,lfq */
8882 || ((insn & (0x3f << 26)) == 57u << 26 /* lxsd,lxssp,lfdp */
8883 /* Exclude lfqu by testing reloc. If relocs are ever
8884 defined for the reduced D field in psq_lu then those
8885 will need testing too. */
8886 && r_type != R_PPC64_TOC16_LO && r_type != R_PPC64_GOT16_LO)
8887 || ((insn & (0x3f << 26)) == 58u << 26 /* ld,lwa */
8888 && (insn & 1) == 0)
8889 || (insn & (0x3f << 26)) == 60u << 26 /* stfq */
8890 || ((insn & (0x3f << 26)) == 61u << 26 /* lxv,stx{v,sd,ssp},stfdp */
8891 /* Exclude stfqu. psq_stu as above for psq_lu. */
8892 && r_type != R_PPC64_TOC16_LO && r_type != R_PPC64_GOT16_LO)
8893 || ((insn & (0x3f << 26)) == 62u << 26 /* std,stq */
8894 && (insn & 1) == 0));
8895 }
8896
8897 /* Examine all relocs referencing .toc sections in order to remove
8898 unused .toc entries. */
8899
8900 bfd_boolean
8901 ppc64_elf_edit_toc (struct bfd_link_info *info)
8902 {
8903 bfd *ibfd;
8904 struct adjust_toc_info toc_inf;
8905 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8906
8907 htab->do_toc_opt = 1;
8908 toc_inf.global_toc_syms = TRUE;
8909 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
8910 {
8911 asection *toc, *sec;
8912 Elf_Internal_Shdr *symtab_hdr;
8913 Elf_Internal_Sym *local_syms;
8914 Elf_Internal_Rela *relstart, *rel, *toc_relocs;
8915 unsigned long *skip, *drop;
8916 unsigned char *used;
8917 unsigned char *keep, last, some_unused;
8918
8919 if (!is_ppc64_elf (ibfd))
8920 continue;
8921
8922 toc = bfd_get_section_by_name (ibfd, ".toc");
8923 if (toc == NULL
8924 || toc->size == 0
8925 || toc->sec_info_type == SEC_INFO_TYPE_JUST_SYMS
8926 || discarded_section (toc))
8927 continue;
8928
8929 toc_relocs = NULL;
8930 local_syms = NULL;
8931 symtab_hdr = &elf_symtab_hdr (ibfd);
8932
8933 /* Look at sections dropped from the final link. */
8934 skip = NULL;
8935 relstart = NULL;
8936 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8937 {
8938 if (sec->reloc_count == 0
8939 || !discarded_section (sec)
8940 || get_opd_info (sec)
8941 || (sec->flags & SEC_ALLOC) == 0
8942 || (sec->flags & SEC_DEBUGGING) != 0)
8943 continue;
8944
8945 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
8946 if (relstart == NULL)
8947 goto error_ret;
8948
8949 /* Run through the relocs to see which toc entries might be
8950 unused. */
8951 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8952 {
8953 enum elf_ppc64_reloc_type r_type;
8954 unsigned long r_symndx;
8955 asection *sym_sec;
8956 struct elf_link_hash_entry *h;
8957 Elf_Internal_Sym *sym;
8958 bfd_vma val;
8959
8960 r_type = ELF64_R_TYPE (rel->r_info);
8961 switch (r_type)
8962 {
8963 default:
8964 continue;
8965
8966 case R_PPC64_TOC16:
8967 case R_PPC64_TOC16_LO:
8968 case R_PPC64_TOC16_HI:
8969 case R_PPC64_TOC16_HA:
8970 case R_PPC64_TOC16_DS:
8971 case R_PPC64_TOC16_LO_DS:
8972 break;
8973 }
8974
8975 r_symndx = ELF64_R_SYM (rel->r_info);
8976 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8977 r_symndx, ibfd))
8978 goto error_ret;
8979
8980 if (sym_sec != toc)
8981 continue;
8982
8983 if (h != NULL)
8984 val = h->root.u.def.value;
8985 else
8986 val = sym->st_value;
8987 val += rel->r_addend;
8988
8989 if (val >= toc->size)
8990 continue;
8991
8992 /* Anything in the toc ought to be aligned to 8 bytes.
8993 If not, don't mark as unused. */
8994 if (val & 7)
8995 continue;
8996
8997 if (skip == NULL)
8998 {
8999 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
9000 if (skip == NULL)
9001 goto error_ret;
9002 }
9003
9004 skip[val >> 3] = ref_from_discarded;
9005 }
9006
9007 if (elf_section_data (sec)->relocs != relstart)
9008 free (relstart);
9009 }
9010
9011 /* For largetoc loads of address constants, we can convert
9012 . addis rx,2,addr@got@ha
9013 . ld ry,addr@got@l(rx)
9014 to
9015 . addis rx,2,addr@toc@ha
9016 . addi ry,rx,addr@toc@l
9017 when addr is within 2G of the toc pointer. This then means
9018 that the word storing "addr" in the toc is no longer needed. */
9019
9020 if (!ppc64_elf_tdata (ibfd)->has_small_toc_reloc
9021 && toc->output_section->rawsize < (bfd_vma) 1 << 31
9022 && toc->reloc_count != 0)
9023 {
9024 /* Read toc relocs. */
9025 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
9026 info->keep_memory);
9027 if (toc_relocs == NULL)
9028 goto error_ret;
9029
9030 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
9031 {
9032 enum elf_ppc64_reloc_type r_type;
9033 unsigned long r_symndx;
9034 asection *sym_sec;
9035 struct elf_link_hash_entry *h;
9036 Elf_Internal_Sym *sym;
9037 bfd_vma val, addr;
9038
9039 r_type = ELF64_R_TYPE (rel->r_info);
9040 if (r_type != R_PPC64_ADDR64)
9041 continue;
9042
9043 r_symndx = ELF64_R_SYM (rel->r_info);
9044 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9045 r_symndx, ibfd))
9046 goto error_ret;
9047
9048 if (sym_sec == NULL
9049 || sym_sec->output_section == NULL
9050 || discarded_section (sym_sec))
9051 continue;
9052
9053 if (!SYMBOL_REFERENCES_LOCAL (info, h))
9054 continue;
9055
9056 if (h != NULL)
9057 {
9058 if (h->type == STT_GNU_IFUNC)
9059 continue;
9060 val = h->root.u.def.value;
9061 }
9062 else
9063 {
9064 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
9065 continue;
9066 val = sym->st_value;
9067 }
9068 val += rel->r_addend;
9069 val += sym_sec->output_section->vma + sym_sec->output_offset;
9070
9071 /* We don't yet know the exact toc pointer value, but we
9072 know it will be somewhere in the toc section. Don't
9073 optimize if the difference from any possible toc
9074 pointer is outside [ff..f80008000, 7fff7fff]. */
9075 addr = toc->output_section->vma + TOC_BASE_OFF;
9076 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
9077 continue;
9078
9079 addr = toc->output_section->vma + toc->output_section->rawsize;
9080 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
9081 continue;
9082
9083 if (skip == NULL)
9084 {
9085 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
9086 if (skip == NULL)
9087 goto error_ret;
9088 }
9089
9090 skip[rel->r_offset >> 3]
9091 |= can_optimize | ((rel - toc_relocs) << 2);
9092 }
9093 }
9094
9095 if (skip == NULL)
9096 continue;
9097
9098 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
9099 if (used == NULL)
9100 {
9101 error_ret:
9102 if (local_syms != NULL
9103 && symtab_hdr->contents != (unsigned char *) local_syms)
9104 free (local_syms);
9105 if (sec != NULL
9106 && relstart != NULL
9107 && elf_section_data (sec)->relocs != relstart)
9108 free (relstart);
9109 if (toc_relocs != NULL
9110 && elf_section_data (toc)->relocs != toc_relocs)
9111 free (toc_relocs);
9112 if (skip != NULL)
9113 free (skip);
9114 return FALSE;
9115 }
9116
9117 /* Now check all kept sections that might reference the toc.
9118 Check the toc itself last. */
9119 for (sec = (ibfd->sections == toc && toc->next ? toc->next
9120 : ibfd->sections);
9121 sec != NULL;
9122 sec = (sec == toc ? NULL
9123 : sec->next == NULL ? toc
9124 : sec->next == toc && toc->next ? toc->next
9125 : sec->next))
9126 {
9127 int repeat;
9128
9129 if (sec->reloc_count == 0
9130 || discarded_section (sec)
9131 || get_opd_info (sec)
9132 || (sec->flags & SEC_ALLOC) == 0
9133 || (sec->flags & SEC_DEBUGGING) != 0)
9134 continue;
9135
9136 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
9137 info->keep_memory);
9138 if (relstart == NULL)
9139 {
9140 free (used);
9141 goto error_ret;
9142 }
9143
9144 /* Mark toc entries referenced as used. */
9145 do
9146 {
9147 repeat = 0;
9148 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
9149 {
9150 enum elf_ppc64_reloc_type r_type;
9151 unsigned long r_symndx;
9152 asection *sym_sec;
9153 struct elf_link_hash_entry *h;
9154 Elf_Internal_Sym *sym;
9155 bfd_vma val;
9156 enum {no_check, check_lo, check_ha} insn_check;
9157
9158 r_type = ELF64_R_TYPE (rel->r_info);
9159 switch (r_type)
9160 {
9161 default:
9162 insn_check = no_check;
9163 break;
9164
9165 case R_PPC64_GOT_TLSLD16_HA:
9166 case R_PPC64_GOT_TLSGD16_HA:
9167 case R_PPC64_GOT_TPREL16_HA:
9168 case R_PPC64_GOT_DTPREL16_HA:
9169 case R_PPC64_GOT16_HA:
9170 case R_PPC64_TOC16_HA:
9171 insn_check = check_ha;
9172 break;
9173
9174 case R_PPC64_GOT_TLSLD16_LO:
9175 case R_PPC64_GOT_TLSGD16_LO:
9176 case R_PPC64_GOT_TPREL16_LO_DS:
9177 case R_PPC64_GOT_DTPREL16_LO_DS:
9178 case R_PPC64_GOT16_LO:
9179 case R_PPC64_GOT16_LO_DS:
9180 case R_PPC64_TOC16_LO:
9181 case R_PPC64_TOC16_LO_DS:
9182 insn_check = check_lo;
9183 break;
9184 }
9185
9186 if (insn_check != no_check)
9187 {
9188 bfd_vma off = rel->r_offset & ~3;
9189 unsigned char buf[4];
9190 unsigned int insn;
9191
9192 if (!bfd_get_section_contents (ibfd, sec, buf, off, 4))
9193 {
9194 free (used);
9195 goto error_ret;
9196 }
9197 insn = bfd_get_32 (ibfd, buf);
9198 if (insn_check == check_lo
9199 ? !ok_lo_toc_insn (insn, r_type)
9200 : ((insn & ((0x3f << 26) | 0x1f << 16))
9201 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */))
9202 {
9203 char str[12];
9204
9205 ppc64_elf_tdata (ibfd)->unexpected_toc_insn = 1;
9206 sprintf (str, "%#08x", insn);
9207 info->callbacks->einfo
9208 /* xgettext:c-format */
9209 (_("%H: toc optimization is not supported for"
9210 " %s instruction.\n"),
9211 ibfd, sec, rel->r_offset & ~3, str);
9212 }
9213 }
9214
9215 switch (r_type)
9216 {
9217 case R_PPC64_TOC16:
9218 case R_PPC64_TOC16_LO:
9219 case R_PPC64_TOC16_HI:
9220 case R_PPC64_TOC16_HA:
9221 case R_PPC64_TOC16_DS:
9222 case R_PPC64_TOC16_LO_DS:
9223 /* In case we're taking addresses of toc entries. */
9224 case R_PPC64_ADDR64:
9225 break;
9226
9227 default:
9228 continue;
9229 }
9230
9231 r_symndx = ELF64_R_SYM (rel->r_info);
9232 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9233 r_symndx, ibfd))
9234 {
9235 free (used);
9236 goto error_ret;
9237 }
9238
9239 if (sym_sec != toc)
9240 continue;
9241
9242 if (h != NULL)
9243 val = h->root.u.def.value;
9244 else
9245 val = sym->st_value;
9246 val += rel->r_addend;
9247
9248 if (val >= toc->size)
9249 continue;
9250
9251 if ((skip[val >> 3] & can_optimize) != 0)
9252 {
9253 bfd_vma off;
9254 unsigned char opc;
9255
9256 switch (r_type)
9257 {
9258 case R_PPC64_TOC16_HA:
9259 break;
9260
9261 case R_PPC64_TOC16_LO_DS:
9262 off = rel->r_offset;
9263 off += (bfd_big_endian (ibfd) ? -2 : 3);
9264 if (!bfd_get_section_contents (ibfd, sec, &opc,
9265 off, 1))
9266 {
9267 free (used);
9268 goto error_ret;
9269 }
9270 if ((opc & (0x3f << 2)) == (58u << 2))
9271 break;
9272 /* Fall through. */
9273
9274 default:
9275 /* Wrong sort of reloc, or not a ld. We may
9276 as well clear ref_from_discarded too. */
9277 skip[val >> 3] = 0;
9278 }
9279 }
9280
9281 if (sec != toc)
9282 used[val >> 3] = 1;
9283 /* For the toc section, we only mark as used if this
9284 entry itself isn't unused. */
9285 else if ((used[rel->r_offset >> 3]
9286 || !(skip[rel->r_offset >> 3] & ref_from_discarded))
9287 && !used[val >> 3])
9288 {
9289 /* Do all the relocs again, to catch reference
9290 chains. */
9291 repeat = 1;
9292 used[val >> 3] = 1;
9293 }
9294 }
9295 }
9296 while (repeat);
9297
9298 if (elf_section_data (sec)->relocs != relstart)
9299 free (relstart);
9300 }
9301
9302 /* Merge the used and skip arrays. Assume that TOC
9303 doublewords not appearing as either used or unused belong
9304 to an entry more than one doubleword in size. */
9305 for (drop = skip, keep = used, last = 0, some_unused = 0;
9306 drop < skip + (toc->size + 7) / 8;
9307 ++drop, ++keep)
9308 {
9309 if (*keep)
9310 {
9311 *drop &= ~ref_from_discarded;
9312 if ((*drop & can_optimize) != 0)
9313 some_unused = 1;
9314 last = 0;
9315 }
9316 else if ((*drop & ref_from_discarded) != 0)
9317 {
9318 some_unused = 1;
9319 last = ref_from_discarded;
9320 }
9321 else
9322 *drop = last;
9323 }
9324
9325 free (used);
9326
9327 if (some_unused)
9328 {
9329 bfd_byte *contents, *src;
9330 unsigned long off;
9331 Elf_Internal_Sym *sym;
9332 bfd_boolean local_toc_syms = FALSE;
9333
9334 /* Shuffle the toc contents, and at the same time convert the
9335 skip array from booleans into offsets. */
9336 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
9337 goto error_ret;
9338
9339 elf_section_data (toc)->this_hdr.contents = contents;
9340
9341 for (src = contents, off = 0, drop = skip;
9342 src < contents + toc->size;
9343 src += 8, ++drop)
9344 {
9345 if ((*drop & (can_optimize | ref_from_discarded)) != 0)
9346 off += 8;
9347 else if (off != 0)
9348 {
9349 *drop = off;
9350 memcpy (src - off, src, 8);
9351 }
9352 }
9353 *drop = off;
9354 toc->rawsize = toc->size;
9355 toc->size = src - contents - off;
9356
9357 /* Adjust addends for relocs against the toc section sym,
9358 and optimize any accesses we can. */
9359 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
9360 {
9361 if (sec->reloc_count == 0
9362 || discarded_section (sec))
9363 continue;
9364
9365 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
9366 info->keep_memory);
9367 if (relstart == NULL)
9368 goto error_ret;
9369
9370 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
9371 {
9372 enum elf_ppc64_reloc_type r_type;
9373 unsigned long r_symndx;
9374 asection *sym_sec;
9375 struct elf_link_hash_entry *h;
9376 bfd_vma val;
9377
9378 r_type = ELF64_R_TYPE (rel->r_info);
9379 switch (r_type)
9380 {
9381 default:
9382 continue;
9383
9384 case R_PPC64_TOC16:
9385 case R_PPC64_TOC16_LO:
9386 case R_PPC64_TOC16_HI:
9387 case R_PPC64_TOC16_HA:
9388 case R_PPC64_TOC16_DS:
9389 case R_PPC64_TOC16_LO_DS:
9390 case R_PPC64_ADDR64:
9391 break;
9392 }
9393
9394 r_symndx = ELF64_R_SYM (rel->r_info);
9395 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9396 r_symndx, ibfd))
9397 goto error_ret;
9398
9399 if (sym_sec != toc)
9400 continue;
9401
9402 if (h != NULL)
9403 val = h->root.u.def.value;
9404 else
9405 {
9406 val = sym->st_value;
9407 if (val != 0)
9408 local_toc_syms = TRUE;
9409 }
9410
9411 val += rel->r_addend;
9412
9413 if (val > toc->rawsize)
9414 val = toc->rawsize;
9415 else if ((skip[val >> 3] & ref_from_discarded) != 0)
9416 continue;
9417 else if ((skip[val >> 3] & can_optimize) != 0)
9418 {
9419 Elf_Internal_Rela *tocrel
9420 = toc_relocs + (skip[val >> 3] >> 2);
9421 unsigned long tsym = ELF64_R_SYM (tocrel->r_info);
9422
9423 switch (r_type)
9424 {
9425 case R_PPC64_TOC16_HA:
9426 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_TOC16_HA);
9427 break;
9428
9429 case R_PPC64_TOC16_LO_DS:
9430 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_LO_DS_OPT);
9431 break;
9432
9433 default:
9434 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
9435 ppc_howto_init ();
9436 info->callbacks->einfo
9437 /* xgettext:c-format */
9438 (_("%H: %s references "
9439 "optimized away TOC entry\n"),
9440 ibfd, sec, rel->r_offset,
9441 ppc64_elf_howto_table[r_type]->name);
9442 bfd_set_error (bfd_error_bad_value);
9443 goto error_ret;
9444 }
9445 rel->r_addend = tocrel->r_addend;
9446 elf_section_data (sec)->relocs = relstart;
9447 continue;
9448 }
9449
9450 if (h != NULL || sym->st_value != 0)
9451 continue;
9452
9453 rel->r_addend -= skip[val >> 3];
9454 elf_section_data (sec)->relocs = relstart;
9455 }
9456
9457 if (elf_section_data (sec)->relocs != relstart)
9458 free (relstart);
9459 }
9460
9461 /* We shouldn't have local or global symbols defined in the TOC,
9462 but handle them anyway. */
9463 if (local_syms != NULL)
9464 for (sym = local_syms;
9465 sym < local_syms + symtab_hdr->sh_info;
9466 ++sym)
9467 if (sym->st_value != 0
9468 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
9469 {
9470 unsigned long i;
9471
9472 if (sym->st_value > toc->rawsize)
9473 i = toc->rawsize >> 3;
9474 else
9475 i = sym->st_value >> 3;
9476
9477 if ((skip[i] & (ref_from_discarded | can_optimize)) != 0)
9478 {
9479 if (local_toc_syms)
9480 _bfd_error_handler
9481 (_("%s defined on removed toc entry"),
9482 bfd_elf_sym_name (ibfd, symtab_hdr, sym, NULL));
9483 do
9484 ++i;
9485 while ((skip[i] & (ref_from_discarded | can_optimize)));
9486 sym->st_value = (bfd_vma) i << 3;
9487 }
9488
9489 sym->st_value -= skip[i];
9490 symtab_hdr->contents = (unsigned char *) local_syms;
9491 }
9492
9493 /* Adjust any global syms defined in this toc input section. */
9494 if (toc_inf.global_toc_syms)
9495 {
9496 toc_inf.toc = toc;
9497 toc_inf.skip = skip;
9498 toc_inf.global_toc_syms = FALSE;
9499 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
9500 &toc_inf);
9501 }
9502
9503 if (toc->reloc_count != 0)
9504 {
9505 Elf_Internal_Shdr *rel_hdr;
9506 Elf_Internal_Rela *wrel;
9507 bfd_size_type sz;
9508
9509 /* Remove unused toc relocs, and adjust those we keep. */
9510 if (toc_relocs == NULL)
9511 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
9512 info->keep_memory);
9513 if (toc_relocs == NULL)
9514 goto error_ret;
9515
9516 wrel = toc_relocs;
9517 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
9518 if ((skip[rel->r_offset >> 3]
9519 & (ref_from_discarded | can_optimize)) == 0)
9520 {
9521 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
9522 wrel->r_info = rel->r_info;
9523 wrel->r_addend = rel->r_addend;
9524 ++wrel;
9525 }
9526 else if (!dec_dynrel_count (rel->r_info, toc, info,
9527 &local_syms, NULL, NULL))
9528 goto error_ret;
9529
9530 elf_section_data (toc)->relocs = toc_relocs;
9531 toc->reloc_count = wrel - toc_relocs;
9532 rel_hdr = _bfd_elf_single_rel_hdr (toc);
9533 sz = rel_hdr->sh_entsize;
9534 rel_hdr->sh_size = toc->reloc_count * sz;
9535 }
9536 }
9537 else if (toc_relocs != NULL
9538 && elf_section_data (toc)->relocs != toc_relocs)
9539 free (toc_relocs);
9540
9541 if (local_syms != NULL
9542 && symtab_hdr->contents != (unsigned char *) local_syms)
9543 {
9544 if (!info->keep_memory)
9545 free (local_syms);
9546 else
9547 symtab_hdr->contents = (unsigned char *) local_syms;
9548 }
9549 free (skip);
9550 }
9551
9552 return TRUE;
9553 }
9554
9555 /* Return true iff input section I references the TOC using
9556 instructions limited to +/-32k offsets. */
9557
9558 bfd_boolean
9559 ppc64_elf_has_small_toc_reloc (asection *i)
9560 {
9561 return (is_ppc64_elf (i->owner)
9562 && ppc64_elf_tdata (i->owner)->has_small_toc_reloc);
9563 }
9564
9565 /* Allocate space for one GOT entry. */
9566
9567 static void
9568 allocate_got (struct elf_link_hash_entry *h,
9569 struct bfd_link_info *info,
9570 struct got_entry *gent)
9571 {
9572 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9573 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
9574 int entsize = (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)
9575 ? 16 : 8);
9576 int rentsize = (gent->tls_type & eh->tls_mask & TLS_GD
9577 ? 2 : 1) * sizeof (Elf64_External_Rela);
9578 asection *got = ppc64_elf_tdata (gent->owner)->got;
9579
9580 gent->got.offset = got->size;
9581 got->size += entsize;
9582
9583 if (h->type == STT_GNU_IFUNC)
9584 {
9585 htab->elf.irelplt->size += rentsize;
9586 htab->got_reli_size += rentsize;
9587 }
9588 else if ((bfd_link_pic (info)
9589 || (htab->elf.dynamic_sections_created
9590 && h->dynindx != -1
9591 && !SYMBOL_REFERENCES_LOCAL (info, h)))
9592 && !UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
9593 {
9594 asection *relgot = ppc64_elf_tdata (gent->owner)->relgot;
9595 relgot->size += rentsize;
9596 }
9597 }
9598
9599 /* This function merges got entries in the same toc group. */
9600
9601 static void
9602 merge_got_entries (struct got_entry **pent)
9603 {
9604 struct got_entry *ent, *ent2;
9605
9606 for (ent = *pent; ent != NULL; ent = ent->next)
9607 if (!ent->is_indirect)
9608 for (ent2 = ent->next; ent2 != NULL; ent2 = ent2->next)
9609 if (!ent2->is_indirect
9610 && ent2->addend == ent->addend
9611 && ent2->tls_type == ent->tls_type
9612 && elf_gp (ent2->owner) == elf_gp (ent->owner))
9613 {
9614 ent2->is_indirect = TRUE;
9615 ent2->got.ent = ent;
9616 }
9617 }
9618
9619 /* If H is undefined, make it dynamic if that makes sense. */
9620
9621 static bfd_boolean
9622 ensure_undef_dynamic (struct bfd_link_info *info,
9623 struct elf_link_hash_entry *h)
9624 {
9625 struct elf_link_hash_table *htab = elf_hash_table (info);
9626
9627 if (htab->dynamic_sections_created
9628 && ((info->dynamic_undefined_weak != 0
9629 && h->root.type == bfd_link_hash_undefweak)
9630 || h->root.type == bfd_link_hash_undefined)
9631 && h->dynindx == -1
9632 && !h->forced_local
9633 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
9634 return bfd_elf_link_record_dynamic_symbol (info, h);
9635 return TRUE;
9636 }
9637
9638 /* Allocate space in .plt, .got and associated reloc sections for
9639 dynamic relocs. */
9640
9641 static bfd_boolean
9642 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
9643 {
9644 struct bfd_link_info *info;
9645 struct ppc_link_hash_table *htab;
9646 asection *s;
9647 struct ppc_link_hash_entry *eh;
9648 struct got_entry **pgent, *gent;
9649
9650 if (h->root.type == bfd_link_hash_indirect)
9651 return TRUE;
9652
9653 info = (struct bfd_link_info *) inf;
9654 htab = ppc_hash_table (info);
9655 if (htab == NULL)
9656 return FALSE;
9657
9658 eh = (struct ppc_link_hash_entry *) h;
9659 /* Run through the TLS GD got entries first if we're changing them
9660 to TPREL. */
9661 if ((eh->tls_mask & TLS_TPRELGD) != 0)
9662 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9663 if (gent->got.refcount > 0
9664 && (gent->tls_type & TLS_GD) != 0)
9665 {
9666 /* This was a GD entry that has been converted to TPREL. If
9667 there happens to be a TPREL entry we can use that one. */
9668 struct got_entry *ent;
9669 for (ent = h->got.glist; ent != NULL; ent = ent->next)
9670 if (ent->got.refcount > 0
9671 && (ent->tls_type & TLS_TPREL) != 0
9672 && ent->addend == gent->addend
9673 && ent->owner == gent->owner)
9674 {
9675 gent->got.refcount = 0;
9676 break;
9677 }
9678
9679 /* If not, then we'll be using our own TPREL entry. */
9680 if (gent->got.refcount != 0)
9681 gent->tls_type = TLS_TLS | TLS_TPREL;
9682 }
9683
9684 /* Remove any list entry that won't generate a word in the GOT before
9685 we call merge_got_entries. Otherwise we risk merging to empty
9686 entries. */
9687 pgent = &h->got.glist;
9688 while ((gent = *pgent) != NULL)
9689 if (gent->got.refcount > 0)
9690 {
9691 if ((gent->tls_type & TLS_LD) != 0
9692 && !h->def_dynamic)
9693 {
9694 ppc64_tlsld_got (gent->owner)->got.refcount += 1;
9695 *pgent = gent->next;
9696 }
9697 else
9698 pgent = &gent->next;
9699 }
9700 else
9701 *pgent = gent->next;
9702
9703 if (!htab->do_multi_toc)
9704 merge_got_entries (&h->got.glist);
9705
9706 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9707 if (!gent->is_indirect)
9708 {
9709 /* Make sure this symbol is output as a dynamic symbol. */
9710 if (!ensure_undef_dynamic (info, h))
9711 return FALSE;
9712
9713 if (!is_ppc64_elf (gent->owner))
9714 abort ();
9715
9716 allocate_got (h, info, gent);
9717 }
9718
9719 /* If no dynamic sections we can't have dynamic relocs, except for
9720 IFUNCs which are handled even in static executables. */
9721 if (!htab->elf.dynamic_sections_created
9722 && h->type != STT_GNU_IFUNC)
9723 eh->dyn_relocs = NULL;
9724
9725 /* Also discard relocs on undefined weak syms with non-default
9726 visibility, or when dynamic_undefined_weak says so. */
9727 else if (UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
9728 eh->dyn_relocs = NULL;
9729
9730 if (eh->dyn_relocs != NULL)
9731 {
9732 struct elf_dyn_relocs *p, **pp;
9733
9734 /* In the shared -Bsymbolic case, discard space allocated for
9735 dynamic pc-relative relocs against symbols which turn out to
9736 be defined in regular objects. For the normal shared case,
9737 discard space for relocs that have become local due to symbol
9738 visibility changes. */
9739
9740 if (bfd_link_pic (info))
9741 {
9742 /* Relocs that use pc_count are those that appear on a call
9743 insn, or certain REL relocs (see must_be_dyn_reloc) that
9744 can be generated via assembly. We want calls to
9745 protected symbols to resolve directly to the function
9746 rather than going via the plt. If people want function
9747 pointer comparisons to work as expected then they should
9748 avoid writing weird assembly. */
9749 if (SYMBOL_CALLS_LOCAL (info, h))
9750 {
9751 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
9752 {
9753 p->count -= p->pc_count;
9754 p->pc_count = 0;
9755 if (p->count == 0)
9756 *pp = p->next;
9757 else
9758 pp = &p->next;
9759 }
9760 }
9761
9762 if (eh->dyn_relocs != NULL)
9763 {
9764 /* Make sure this symbol is output as a dynamic symbol. */
9765 if (!ensure_undef_dynamic (info, h))
9766 return FALSE;
9767 }
9768 }
9769 else if (h->type == STT_GNU_IFUNC)
9770 {
9771 /* A plt entry is always created when making direct calls to
9772 an ifunc, even when building a static executable, but
9773 that doesn't cover all cases. We may have only an ifunc
9774 initialised function pointer for a given ifunc symbol.
9775
9776 For ELFv2, dynamic relocations are not required when
9777 generating a global entry PLT stub. */
9778 if (abiversion (info->output_bfd) >= 2)
9779 {
9780 if (global_entry_stub (h))
9781 eh->dyn_relocs = NULL;
9782 }
9783
9784 /* For ELFv1 we have function descriptors. Descriptors need
9785 to be treated like PLT entries and thus have dynamic
9786 relocations. One exception is when the function
9787 descriptor is copied into .dynbss (which should only
9788 happen with ancient versions of gcc). */
9789 else if (h->needs_copy)
9790 eh->dyn_relocs = NULL;
9791 }
9792 else if (ELIMINATE_COPY_RELOCS)
9793 {
9794 /* For the non-pic case, discard space for relocs against
9795 symbols which turn out to need copy relocs or are not
9796 dynamic. */
9797 if (!h->non_got_ref
9798 && !h->def_regular)
9799 {
9800 /* Make sure this symbol is output as a dynamic symbol. */
9801 if (!ensure_undef_dynamic (info, h))
9802 return FALSE;
9803
9804 if (h->dynindx == -1)
9805 eh->dyn_relocs = NULL;
9806 }
9807 else
9808 eh->dyn_relocs = NULL;
9809 }
9810
9811 /* Finally, allocate space. */
9812 for (p = eh->dyn_relocs; p != NULL; p = p->next)
9813 {
9814 asection *sreloc = elf_section_data (p->sec)->sreloc;
9815 if (eh->elf.type == STT_GNU_IFUNC)
9816 sreloc = htab->elf.irelplt;
9817 sreloc->size += p->count * sizeof (Elf64_External_Rela);
9818 }
9819 }
9820
9821 if ((htab->elf.dynamic_sections_created
9822 && h->dynindx != -1)
9823 || h->type == STT_GNU_IFUNC)
9824 {
9825 struct plt_entry *pent;
9826 bfd_boolean doneone = FALSE;
9827 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
9828 if (pent->plt.refcount > 0)
9829 {
9830 if (!htab->elf.dynamic_sections_created
9831 || h->dynindx == -1)
9832 {
9833 s = htab->elf.iplt;
9834 pent->plt.offset = s->size;
9835 s->size += PLT_ENTRY_SIZE (htab);
9836 s = htab->elf.irelplt;
9837 }
9838 else
9839 {
9840 /* If this is the first .plt entry, make room for the special
9841 first entry. */
9842 s = htab->elf.splt;
9843 if (s->size == 0)
9844 s->size += PLT_INITIAL_ENTRY_SIZE (htab);
9845
9846 pent->plt.offset = s->size;
9847
9848 /* Make room for this entry. */
9849 s->size += PLT_ENTRY_SIZE (htab);
9850
9851 /* Make room for the .glink code. */
9852 s = htab->glink;
9853 if (s->size == 0)
9854 s->size += GLINK_CALL_STUB_SIZE;
9855 if (htab->opd_abi)
9856 {
9857 /* We need bigger stubs past index 32767. */
9858 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
9859 s->size += 4;
9860 s->size += 2*4;
9861 }
9862 else
9863 s->size += 4;
9864
9865 /* We also need to make an entry in the .rela.plt section. */
9866 s = htab->elf.srelplt;
9867 }
9868 s->size += sizeof (Elf64_External_Rela);
9869 doneone = TRUE;
9870 }
9871 else
9872 pent->plt.offset = (bfd_vma) -1;
9873 if (!doneone)
9874 {
9875 h->plt.plist = NULL;
9876 h->needs_plt = 0;
9877 }
9878 }
9879 else
9880 {
9881 h->plt.plist = NULL;
9882 h->needs_plt = 0;
9883 }
9884
9885 return TRUE;
9886 }
9887
9888 /* Called via elf_link_hash_traverse from ppc64_elf_size_dynamic_sections
9889 to set up space for global entry stubs. These are put in glink,
9890 after the branch table. */
9891
9892 static bfd_boolean
9893 size_global_entry_stubs (struct elf_link_hash_entry *h, void *inf)
9894 {
9895 struct bfd_link_info *info;
9896 struct ppc_link_hash_table *htab;
9897 struct plt_entry *pent;
9898 asection *s;
9899
9900 if (h->root.type == bfd_link_hash_indirect)
9901 return TRUE;
9902
9903 if (!h->pointer_equality_needed)
9904 return TRUE;
9905
9906 if (h->def_regular)
9907 return TRUE;
9908
9909 info = inf;
9910 htab = ppc_hash_table (info);
9911 if (htab == NULL)
9912 return FALSE;
9913
9914 s = htab->glink;
9915 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
9916 if (pent->plt.offset != (bfd_vma) -1
9917 && pent->addend == 0)
9918 {
9919 /* For ELFv2, if this symbol is not defined in a regular file
9920 and we are not generating a shared library or pie, then we
9921 need to define the symbol in the executable on a call stub.
9922 This is to avoid text relocations. */
9923 s->size = (s->size + 15) & -16;
9924 h->root.type = bfd_link_hash_defined;
9925 h->root.u.def.section = s;
9926 h->root.u.def.value = s->size;
9927 s->size += 16;
9928 break;
9929 }
9930 return TRUE;
9931 }
9932
9933 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
9934 read-only sections. */
9935
9936 static bfd_boolean
9937 maybe_set_textrel (struct elf_link_hash_entry *h, void *info)
9938 {
9939 if (h->root.type == bfd_link_hash_indirect)
9940 return TRUE;
9941
9942 if (readonly_dynrelocs (h))
9943 {
9944 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
9945
9946 /* Not an error, just cut short the traversal. */
9947 return FALSE;
9948 }
9949 return TRUE;
9950 }
9951
9952 /* Set the sizes of the dynamic sections. */
9953
9954 static bfd_boolean
9955 ppc64_elf_size_dynamic_sections (bfd *output_bfd,
9956 struct bfd_link_info *info)
9957 {
9958 struct ppc_link_hash_table *htab;
9959 bfd *dynobj;
9960 asection *s;
9961 bfd_boolean relocs;
9962 bfd *ibfd;
9963 struct got_entry *first_tlsld;
9964
9965 htab = ppc_hash_table (info);
9966 if (htab == NULL)
9967 return FALSE;
9968
9969 dynobj = htab->elf.dynobj;
9970 if (dynobj == NULL)
9971 abort ();
9972
9973 if (htab->elf.dynamic_sections_created)
9974 {
9975 /* Set the contents of the .interp section to the interpreter. */
9976 if (bfd_link_executable (info) && !info->nointerp)
9977 {
9978 s = bfd_get_linker_section (dynobj, ".interp");
9979 if (s == NULL)
9980 abort ();
9981 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
9982 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
9983 }
9984 }
9985
9986 /* Set up .got offsets for local syms, and space for local dynamic
9987 relocs. */
9988 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
9989 {
9990 struct got_entry **lgot_ents;
9991 struct got_entry **end_lgot_ents;
9992 struct plt_entry **local_plt;
9993 struct plt_entry **end_local_plt;
9994 unsigned char *lgot_masks;
9995 bfd_size_type locsymcount;
9996 Elf_Internal_Shdr *symtab_hdr;
9997
9998 if (!is_ppc64_elf (ibfd))
9999 continue;
10000
10001 for (s = ibfd->sections; s != NULL; s = s->next)
10002 {
10003 struct ppc_dyn_relocs *p;
10004
10005 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
10006 {
10007 if (!bfd_is_abs_section (p->sec)
10008 && bfd_is_abs_section (p->sec->output_section))
10009 {
10010 /* Input section has been discarded, either because
10011 it is a copy of a linkonce section or due to
10012 linker script /DISCARD/, so we'll be discarding
10013 the relocs too. */
10014 }
10015 else if (p->count != 0)
10016 {
10017 asection *srel = elf_section_data (p->sec)->sreloc;
10018 if (p->ifunc)
10019 srel = htab->elf.irelplt;
10020 srel->size += p->count * sizeof (Elf64_External_Rela);
10021 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
10022 info->flags |= DF_TEXTREL;
10023 }
10024 }
10025 }
10026
10027 lgot_ents = elf_local_got_ents (ibfd);
10028 if (!lgot_ents)
10029 continue;
10030
10031 symtab_hdr = &elf_symtab_hdr (ibfd);
10032 locsymcount = symtab_hdr->sh_info;
10033 end_lgot_ents = lgot_ents + locsymcount;
10034 local_plt = (struct plt_entry **) end_lgot_ents;
10035 end_local_plt = local_plt + locsymcount;
10036 lgot_masks = (unsigned char *) end_local_plt;
10037 s = ppc64_elf_tdata (ibfd)->got;
10038 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
10039 {
10040 struct got_entry **pent, *ent;
10041
10042 pent = lgot_ents;
10043 while ((ent = *pent) != NULL)
10044 if (ent->got.refcount > 0)
10045 {
10046 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
10047 {
10048 ppc64_tlsld_got (ibfd)->got.refcount += 1;
10049 *pent = ent->next;
10050 }
10051 else
10052 {
10053 unsigned int ent_size = 8;
10054 unsigned int rel_size = sizeof (Elf64_External_Rela);
10055
10056 ent->got.offset = s->size;
10057 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
10058 {
10059 ent_size *= 2;
10060 rel_size *= 2;
10061 }
10062 s->size += ent_size;
10063 if ((*lgot_masks & PLT_IFUNC) != 0)
10064 {
10065 htab->elf.irelplt->size += rel_size;
10066 htab->got_reli_size += rel_size;
10067 }
10068 else if (bfd_link_pic (info))
10069 {
10070 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
10071 srel->size += rel_size;
10072 }
10073 pent = &ent->next;
10074 }
10075 }
10076 else
10077 *pent = ent->next;
10078 }
10079
10080 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
10081 for (; local_plt < end_local_plt; ++local_plt)
10082 {
10083 struct plt_entry *ent;
10084
10085 for (ent = *local_plt; ent != NULL; ent = ent->next)
10086 if (ent->plt.refcount > 0)
10087 {
10088 s = htab->elf.iplt;
10089 ent->plt.offset = s->size;
10090 s->size += PLT_ENTRY_SIZE (htab);
10091
10092 htab->elf.irelplt->size += sizeof (Elf64_External_Rela);
10093 }
10094 else
10095 ent->plt.offset = (bfd_vma) -1;
10096 }
10097 }
10098
10099 /* Allocate global sym .plt and .got entries, and space for global
10100 sym dynamic relocs. */
10101 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
10102 /* Stash the end of glink branch table. */
10103 if (htab->glink != NULL)
10104 htab->glink->rawsize = htab->glink->size;
10105
10106 if (!htab->opd_abi && !bfd_link_pic (info))
10107 elf_link_hash_traverse (&htab->elf, size_global_entry_stubs, info);
10108
10109 first_tlsld = NULL;
10110 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
10111 {
10112 struct got_entry *ent;
10113
10114 if (!is_ppc64_elf (ibfd))
10115 continue;
10116
10117 ent = ppc64_tlsld_got (ibfd);
10118 if (ent->got.refcount > 0)
10119 {
10120 if (!htab->do_multi_toc && first_tlsld != NULL)
10121 {
10122 ent->is_indirect = TRUE;
10123 ent->got.ent = first_tlsld;
10124 }
10125 else
10126 {
10127 if (first_tlsld == NULL)
10128 first_tlsld = ent;
10129 s = ppc64_elf_tdata (ibfd)->got;
10130 ent->got.offset = s->size;
10131 ent->owner = ibfd;
10132 s->size += 16;
10133 if (bfd_link_pic (info))
10134 {
10135 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
10136 srel->size += sizeof (Elf64_External_Rela);
10137 }
10138 }
10139 }
10140 else
10141 ent->got.offset = (bfd_vma) -1;
10142 }
10143
10144 /* We now have determined the sizes of the various dynamic sections.
10145 Allocate memory for them. */
10146 relocs = FALSE;
10147 for (s = dynobj->sections; s != NULL; s = s->next)
10148 {
10149 if ((s->flags & SEC_LINKER_CREATED) == 0)
10150 continue;
10151
10152 if (s == htab->brlt || s == htab->relbrlt)
10153 /* These haven't been allocated yet; don't strip. */
10154 continue;
10155 else if (s == htab->elf.sgot
10156 || s == htab->elf.splt
10157 || s == htab->elf.iplt
10158 || s == htab->glink
10159 || s == htab->elf.sdynbss
10160 || s == htab->elf.sdynrelro)
10161 {
10162 /* Strip this section if we don't need it; see the
10163 comment below. */
10164 }
10165 else if (s == htab->glink_eh_frame)
10166 {
10167 if (!bfd_is_abs_section (s->output_section))
10168 /* Not sized yet. */
10169 continue;
10170 }
10171 else if (CONST_STRNEQ (s->name, ".rela"))
10172 {
10173 if (s->size != 0)
10174 {
10175 if (s != htab->elf.srelplt)
10176 relocs = TRUE;
10177
10178 /* We use the reloc_count field as a counter if we need
10179 to copy relocs into the output file. */
10180 s->reloc_count = 0;
10181 }
10182 }
10183 else
10184 {
10185 /* It's not one of our sections, so don't allocate space. */
10186 continue;
10187 }
10188
10189 if (s->size == 0)
10190 {
10191 /* If we don't need this section, strip it from the
10192 output file. This is mostly to handle .rela.bss and
10193 .rela.plt. We must create both sections in
10194 create_dynamic_sections, because they must be created
10195 before the linker maps input sections to output
10196 sections. The linker does that before
10197 adjust_dynamic_symbol is called, and it is that
10198 function which decides whether anything needs to go
10199 into these sections. */
10200 s->flags |= SEC_EXCLUDE;
10201 continue;
10202 }
10203
10204 if ((s->flags & SEC_HAS_CONTENTS) == 0)
10205 continue;
10206
10207 /* Allocate memory for the section contents. We use bfd_zalloc
10208 here in case unused entries are not reclaimed before the
10209 section's contents are written out. This should not happen,
10210 but this way if it does we get a R_PPC64_NONE reloc in .rela
10211 sections instead of garbage.
10212 We also rely on the section contents being zero when writing
10213 the GOT and .dynrelro. */
10214 s->contents = bfd_zalloc (dynobj, s->size);
10215 if (s->contents == NULL)
10216 return FALSE;
10217 }
10218
10219 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
10220 {
10221 if (!is_ppc64_elf (ibfd))
10222 continue;
10223
10224 s = ppc64_elf_tdata (ibfd)->got;
10225 if (s != NULL && s != htab->elf.sgot)
10226 {
10227 if (s->size == 0)
10228 s->flags |= SEC_EXCLUDE;
10229 else
10230 {
10231 s->contents = bfd_zalloc (ibfd, s->size);
10232 if (s->contents == NULL)
10233 return FALSE;
10234 }
10235 }
10236 s = ppc64_elf_tdata (ibfd)->relgot;
10237 if (s != NULL)
10238 {
10239 if (s->size == 0)
10240 s->flags |= SEC_EXCLUDE;
10241 else
10242 {
10243 s->contents = bfd_zalloc (ibfd, s->size);
10244 if (s->contents == NULL)
10245 return FALSE;
10246 relocs = TRUE;
10247 s->reloc_count = 0;
10248 }
10249 }
10250 }
10251
10252 if (htab->elf.dynamic_sections_created)
10253 {
10254 bfd_boolean tls_opt;
10255
10256 /* Add some entries to the .dynamic section. We fill in the
10257 values later, in ppc64_elf_finish_dynamic_sections, but we
10258 must add the entries now so that we get the correct size for
10259 the .dynamic section. The DT_DEBUG entry is filled in by the
10260 dynamic linker and used by the debugger. */
10261 #define add_dynamic_entry(TAG, VAL) \
10262 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
10263
10264 if (bfd_link_executable (info))
10265 {
10266 if (!add_dynamic_entry (DT_DEBUG, 0))
10267 return FALSE;
10268 }
10269
10270 if (htab->elf.splt != NULL && htab->elf.splt->size != 0)
10271 {
10272 if (!add_dynamic_entry (DT_PLTGOT, 0)
10273 || !add_dynamic_entry (DT_PLTRELSZ, 0)
10274 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
10275 || !add_dynamic_entry (DT_JMPREL, 0)
10276 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
10277 return FALSE;
10278 }
10279
10280 if (NO_OPD_RELOCS && abiversion (output_bfd) <= 1)
10281 {
10282 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
10283 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
10284 return FALSE;
10285 }
10286
10287 tls_opt = (htab->params->tls_get_addr_opt
10288 && htab->tls_get_addr_fd != NULL
10289 && htab->tls_get_addr_fd->elf.plt.plist != NULL);
10290 if (tls_opt || !htab->opd_abi)
10291 {
10292 if (!add_dynamic_entry (DT_PPC64_OPT, tls_opt ? PPC64_OPT_TLS : 0))
10293 return FALSE;
10294 }
10295
10296 if (relocs)
10297 {
10298 if (!add_dynamic_entry (DT_RELA, 0)
10299 || !add_dynamic_entry (DT_RELASZ, 0)
10300 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
10301 return FALSE;
10302
10303 /* If any dynamic relocs apply to a read-only section,
10304 then we need a DT_TEXTREL entry. */
10305 if ((info->flags & DF_TEXTREL) == 0)
10306 elf_link_hash_traverse (&htab->elf, maybe_set_textrel, info);
10307
10308 if ((info->flags & DF_TEXTREL) != 0)
10309 {
10310 if (!add_dynamic_entry (DT_TEXTREL, 0))
10311 return FALSE;
10312 }
10313 }
10314 }
10315 #undef add_dynamic_entry
10316
10317 return TRUE;
10318 }
10319
10320 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
10321
10322 static bfd_boolean
10323 ppc64_elf_hash_symbol (struct elf_link_hash_entry *h)
10324 {
10325 if (h->plt.plist != NULL
10326 && !h->def_regular
10327 && !h->pointer_equality_needed)
10328 return FALSE;
10329
10330 return _bfd_elf_hash_symbol (h);
10331 }
10332
10333 /* Determine the type of stub needed, if any, for a call. */
10334
10335 static inline enum ppc_stub_type
10336 ppc_type_of_stub (asection *input_sec,
10337 const Elf_Internal_Rela *rel,
10338 struct ppc_link_hash_entry **hash,
10339 struct plt_entry **plt_ent,
10340 bfd_vma destination,
10341 unsigned long local_off)
10342 {
10343 struct ppc_link_hash_entry *h = *hash;
10344 bfd_vma location;
10345 bfd_vma branch_offset;
10346 bfd_vma max_branch_offset;
10347 enum elf_ppc64_reloc_type r_type;
10348
10349 if (h != NULL)
10350 {
10351 struct plt_entry *ent;
10352 struct ppc_link_hash_entry *fdh = h;
10353 if (h->oh != NULL
10354 && h->oh->is_func_descriptor)
10355 {
10356 fdh = ppc_follow_link (h->oh);
10357 *hash = fdh;
10358 }
10359
10360 for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next)
10361 if (ent->addend == rel->r_addend
10362 && ent->plt.offset != (bfd_vma) -1)
10363 {
10364 *plt_ent = ent;
10365 return ppc_stub_plt_call;
10366 }
10367
10368 /* Here, we know we don't have a plt entry. If we don't have a
10369 either a defined function descriptor or a defined entry symbol
10370 in a regular object file, then it is pointless trying to make
10371 any other type of stub. */
10372 if (!is_static_defined (&fdh->elf)
10373 && !is_static_defined (&h->elf))
10374 return ppc_stub_none;
10375 }
10376 else if (elf_local_got_ents (input_sec->owner) != NULL)
10377 {
10378 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (input_sec->owner);
10379 struct plt_entry **local_plt = (struct plt_entry **)
10380 elf_local_got_ents (input_sec->owner) + symtab_hdr->sh_info;
10381 unsigned long r_symndx = ELF64_R_SYM (rel->r_info);
10382
10383 if (local_plt[r_symndx] != NULL)
10384 {
10385 struct plt_entry *ent;
10386
10387 for (ent = local_plt[r_symndx]; ent != NULL; ent = ent->next)
10388 if (ent->addend == rel->r_addend
10389 && ent->plt.offset != (bfd_vma) -1)
10390 {
10391 *plt_ent = ent;
10392 return ppc_stub_plt_call;
10393 }
10394 }
10395 }
10396
10397 /* Determine where the call point is. */
10398 location = (input_sec->output_offset
10399 + input_sec->output_section->vma
10400 + rel->r_offset);
10401
10402 branch_offset = destination - location;
10403 r_type = ELF64_R_TYPE (rel->r_info);
10404
10405 /* Determine if a long branch stub is needed. */
10406 max_branch_offset = 1 << 25;
10407 if (r_type != R_PPC64_REL24)
10408 max_branch_offset = 1 << 15;
10409
10410 if (branch_offset + max_branch_offset >= 2 * max_branch_offset - local_off)
10411 /* We need a stub. Figure out whether a long_branch or plt_branch
10412 is needed later. */
10413 return ppc_stub_long_branch;
10414
10415 return ppc_stub_none;
10416 }
10417
10418 /* With power7 weakly ordered memory model, it is possible for ld.so
10419 to update a plt entry in one thread and have another thread see a
10420 stale zero toc entry. To avoid this we need some sort of acquire
10421 barrier in the call stub. One solution is to make the load of the
10422 toc word seem to appear to depend on the load of the function entry
10423 word. Another solution is to test for r2 being zero, and branch to
10424 the appropriate glink entry if so.
10425
10426 . fake dep barrier compare
10427 . ld 12,xxx(2) ld 12,xxx(2)
10428 . mtctr 12 mtctr 12
10429 . xor 11,12,12 ld 2,xxx+8(2)
10430 . add 2,2,11 cmpldi 2,0
10431 . ld 2,xxx+8(2) bnectr+
10432 . bctr b <glink_entry>
10433
10434 The solution involving the compare turns out to be faster, so
10435 that's what we use unless the branch won't reach. */
10436
10437 #define ALWAYS_USE_FAKE_DEP 0
10438 #define ALWAYS_EMIT_R2SAVE 0
10439
10440 #define PPC_LO(v) ((v) & 0xffff)
10441 #define PPC_HI(v) (((v) >> 16) & 0xffff)
10442 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
10443
10444 static inline unsigned int
10445 plt_stub_size (struct ppc_link_hash_table *htab,
10446 struct ppc_stub_hash_entry *stub_entry,
10447 bfd_vma off)
10448 {
10449 unsigned size = 12;
10450
10451 if (ALWAYS_EMIT_R2SAVE
10452 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10453 size += 4;
10454 if (PPC_HA (off) != 0)
10455 size += 4;
10456 if (htab->opd_abi)
10457 {
10458 size += 4;
10459 if (htab->params->plt_static_chain)
10460 size += 4;
10461 if (htab->params->plt_thread_safe
10462 && htab->elf.dynamic_sections_created
10463 && stub_entry->h != NULL
10464 && stub_entry->h->elf.dynindx != -1)
10465 size += 8;
10466 if (PPC_HA (off + 8 + 8 * htab->params->plt_static_chain) != PPC_HA (off))
10467 size += 4;
10468 }
10469 if (stub_entry->h != NULL
10470 && (stub_entry->h == htab->tls_get_addr_fd
10471 || stub_entry->h == htab->tls_get_addr)
10472 && htab->params->tls_get_addr_opt)
10473 {
10474 size += 7 * 4;
10475 if (ALWAYS_EMIT_R2SAVE
10476 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10477 size += 6 * 4;
10478 }
10479 return size;
10480 }
10481
10482 /* Depending on the sign of plt_stub_align:
10483 If positive, return the padding to align to a 2**plt_stub_align
10484 boundary.
10485 If negative, if this stub would cross fewer 2**plt_stub_align
10486 boundaries if we align, then return the padding needed to do so. */
10487
10488 static inline unsigned int
10489 plt_stub_pad (struct ppc_link_hash_table *htab,
10490 struct ppc_stub_hash_entry *stub_entry,
10491 bfd_vma plt_off)
10492 {
10493 int stub_align;
10494 unsigned stub_size = plt_stub_size (htab, stub_entry, plt_off);
10495 bfd_vma stub_off = stub_entry->group->stub_sec->size;
10496
10497 if (htab->params->plt_stub_align >= 0)
10498 {
10499 stub_align = 1 << htab->params->plt_stub_align;
10500 if ((stub_off & (stub_align - 1)) != 0)
10501 return stub_align - (stub_off & (stub_align - 1));
10502 return 0;
10503 }
10504
10505 stub_align = 1 << -htab->params->plt_stub_align;
10506 if (((stub_off + stub_size - 1) & -stub_align) - (stub_off & -stub_align)
10507 > ((stub_size - 1) & -stub_align))
10508 return stub_align - (stub_off & (stub_align - 1));
10509 return 0;
10510 }
10511
10512 /* Build a .plt call stub. */
10513
10514 static inline bfd_byte *
10515 build_plt_stub (struct ppc_link_hash_table *htab,
10516 struct ppc_stub_hash_entry *stub_entry,
10517 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
10518 {
10519 bfd *obfd = htab->params->stub_bfd;
10520 bfd_boolean plt_load_toc = htab->opd_abi;
10521 bfd_boolean plt_static_chain = htab->params->plt_static_chain;
10522 bfd_boolean plt_thread_safe = (htab->params->plt_thread_safe
10523 && htab->elf.dynamic_sections_created
10524 && stub_entry->h != NULL
10525 && stub_entry->h->elf.dynindx != -1);
10526 bfd_boolean use_fake_dep = plt_thread_safe;
10527 bfd_vma cmp_branch_off = 0;
10528
10529 if (!ALWAYS_USE_FAKE_DEP
10530 && plt_load_toc
10531 && plt_thread_safe
10532 && !((stub_entry->h == htab->tls_get_addr_fd
10533 || stub_entry->h == htab->tls_get_addr)
10534 && htab->params->tls_get_addr_opt))
10535 {
10536 bfd_vma pltoff = stub_entry->plt_ent->plt.offset & ~1;
10537 bfd_vma pltindex = ((pltoff - PLT_INITIAL_ENTRY_SIZE (htab))
10538 / PLT_ENTRY_SIZE (htab));
10539 bfd_vma glinkoff = GLINK_CALL_STUB_SIZE + pltindex * 8;
10540 bfd_vma to, from;
10541
10542 if (pltindex > 32768)
10543 glinkoff += (pltindex - 32768) * 4;
10544 to = (glinkoff
10545 + htab->glink->output_offset
10546 + htab->glink->output_section->vma);
10547 from = (p - stub_entry->group->stub_sec->contents
10548 + 4 * (ALWAYS_EMIT_R2SAVE
10549 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10550 + 4 * (PPC_HA (offset) != 0)
10551 + 4 * (PPC_HA (offset + 8 + 8 * plt_static_chain)
10552 != PPC_HA (offset))
10553 + 4 * (plt_static_chain != 0)
10554 + 20
10555 + stub_entry->group->stub_sec->output_offset
10556 + stub_entry->group->stub_sec->output_section->vma);
10557 cmp_branch_off = to - from;
10558 use_fake_dep = cmp_branch_off + (1 << 25) >= (1 << 26);
10559 }
10560
10561 if (PPC_HA (offset) != 0)
10562 {
10563 if (r != NULL)
10564 {
10565 if (ALWAYS_EMIT_R2SAVE
10566 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10567 r[0].r_offset += 4;
10568 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
10569 r[1].r_offset = r[0].r_offset + 4;
10570 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10571 r[1].r_addend = r[0].r_addend;
10572 if (plt_load_toc)
10573 {
10574 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10575 {
10576 r[2].r_offset = r[1].r_offset + 4;
10577 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO);
10578 r[2].r_addend = r[0].r_addend;
10579 }
10580 else
10581 {
10582 r[2].r_offset = r[1].r_offset + 8 + 8 * use_fake_dep;
10583 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10584 r[2].r_addend = r[0].r_addend + 8;
10585 if (plt_static_chain)
10586 {
10587 r[3].r_offset = r[2].r_offset + 4;
10588 r[3].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10589 r[3].r_addend = r[0].r_addend + 16;
10590 }
10591 }
10592 }
10593 }
10594 if (ALWAYS_EMIT_R2SAVE
10595 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10596 bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p), p += 4;
10597 if (plt_load_toc)
10598 {
10599 bfd_put_32 (obfd, ADDIS_R11_R2 | PPC_HA (offset), p), p += 4;
10600 bfd_put_32 (obfd, LD_R12_0R11 | PPC_LO (offset), p), p += 4;
10601 }
10602 else
10603 {
10604 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
10605 bfd_put_32 (obfd, LD_R12_0R12 | PPC_LO (offset), p), p += 4;
10606 }
10607 if (plt_load_toc
10608 && PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10609 {
10610 bfd_put_32 (obfd, ADDI_R11_R11 | PPC_LO (offset), p), p += 4;
10611 offset = 0;
10612 }
10613 bfd_put_32 (obfd, MTCTR_R12, p), p += 4;
10614 if (plt_load_toc)
10615 {
10616 if (use_fake_dep)
10617 {
10618 bfd_put_32 (obfd, XOR_R2_R12_R12, p), p += 4;
10619 bfd_put_32 (obfd, ADD_R11_R11_R2, p), p += 4;
10620 }
10621 bfd_put_32 (obfd, LD_R2_0R11 | PPC_LO (offset + 8), p), p += 4;
10622 if (plt_static_chain)
10623 bfd_put_32 (obfd, LD_R11_0R11 | PPC_LO (offset + 16), p), p += 4;
10624 }
10625 }
10626 else
10627 {
10628 if (r != NULL)
10629 {
10630 if (ALWAYS_EMIT_R2SAVE
10631 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10632 r[0].r_offset += 4;
10633 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10634 if (plt_load_toc)
10635 {
10636 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10637 {
10638 r[1].r_offset = r[0].r_offset + 4;
10639 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16);
10640 r[1].r_addend = r[0].r_addend;
10641 }
10642 else
10643 {
10644 r[1].r_offset = r[0].r_offset + 8 + 8 * use_fake_dep;
10645 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10646 r[1].r_addend = r[0].r_addend + 8 + 8 * plt_static_chain;
10647 if (plt_static_chain)
10648 {
10649 r[2].r_offset = r[1].r_offset + 4;
10650 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10651 r[2].r_addend = r[0].r_addend + 8;
10652 }
10653 }
10654 }
10655 }
10656 if (ALWAYS_EMIT_R2SAVE
10657 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10658 bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p), p += 4;
10659 bfd_put_32 (obfd, LD_R12_0R2 | PPC_LO (offset), p), p += 4;
10660 if (plt_load_toc
10661 && PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10662 {
10663 bfd_put_32 (obfd, ADDI_R2_R2 | PPC_LO (offset), p), p += 4;
10664 offset = 0;
10665 }
10666 bfd_put_32 (obfd, MTCTR_R12, p), p += 4;
10667 if (plt_load_toc)
10668 {
10669 if (use_fake_dep)
10670 {
10671 bfd_put_32 (obfd, XOR_R11_R12_R12, p), p += 4;
10672 bfd_put_32 (obfd, ADD_R2_R2_R11, p), p += 4;
10673 }
10674 if (plt_static_chain)
10675 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset + 16), p), p += 4;
10676 bfd_put_32 (obfd, LD_R2_0R2 | PPC_LO (offset + 8), p), p += 4;
10677 }
10678 }
10679 if (plt_load_toc && plt_thread_safe && !use_fake_dep)
10680 {
10681 bfd_put_32 (obfd, CMPLDI_R2_0, p), p += 4;
10682 bfd_put_32 (obfd, BNECTR_P4, p), p += 4;
10683 bfd_put_32 (obfd, B_DOT | (cmp_branch_off & 0x3fffffc), p), p += 4;
10684 }
10685 else
10686 bfd_put_32 (obfd, BCTR, p), p += 4;
10687 return p;
10688 }
10689
10690 /* Build a special .plt call stub for __tls_get_addr. */
10691
10692 #define LD_R11_0R3 0xe9630000
10693 #define LD_R12_0R3 0xe9830000
10694 #define MR_R0_R3 0x7c601b78
10695 #define CMPDI_R11_0 0x2c2b0000
10696 #define ADD_R3_R12_R13 0x7c6c6a14
10697 #define BEQLR 0x4d820020
10698 #define MR_R3_R0 0x7c030378
10699 #define STD_R11_0R1 0xf9610000
10700 #define BCTRL 0x4e800421
10701 #define LD_R11_0R1 0xe9610000
10702 #define MTLR_R11 0x7d6803a6
10703
10704 static inline bfd_byte *
10705 build_tls_get_addr_stub (struct ppc_link_hash_table *htab,
10706 struct ppc_stub_hash_entry *stub_entry,
10707 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
10708 {
10709 bfd *obfd = htab->params->stub_bfd;
10710
10711 bfd_put_32 (obfd, LD_R11_0R3 + 0, p), p += 4;
10712 bfd_put_32 (obfd, LD_R12_0R3 + 8, p), p += 4;
10713 bfd_put_32 (obfd, MR_R0_R3, p), p += 4;
10714 bfd_put_32 (obfd, CMPDI_R11_0, p), p += 4;
10715 bfd_put_32 (obfd, ADD_R3_R12_R13, p), p += 4;
10716 bfd_put_32 (obfd, BEQLR, p), p += 4;
10717 bfd_put_32 (obfd, MR_R3_R0, p), p += 4;
10718 if (r != NULL)
10719 r[0].r_offset += 7 * 4;
10720 if (!ALWAYS_EMIT_R2SAVE
10721 && stub_entry->stub_type != ppc_stub_plt_call_r2save)
10722 return build_plt_stub (htab, stub_entry, p, offset, r);
10723
10724 bfd_put_32 (obfd, MFLR_R11, p), p += 4;
10725 bfd_put_32 (obfd, STD_R11_0R1 + STK_LINKER (htab), p), p += 4;
10726
10727 if (r != NULL)
10728 r[0].r_offset += 2 * 4;
10729 p = build_plt_stub (htab, stub_entry, p, offset, r);
10730 bfd_put_32 (obfd, BCTRL, p - 4);
10731
10732 bfd_put_32 (obfd, LD_R2_0R1 + STK_TOC (htab), p), p += 4;
10733 bfd_put_32 (obfd, LD_R11_0R1 + STK_LINKER (htab), p), p += 4;
10734 bfd_put_32 (obfd, MTLR_R11, p), p += 4;
10735 bfd_put_32 (obfd, BLR, p), p += 4;
10736
10737 return p;
10738 }
10739
10740 static Elf_Internal_Rela *
10741 get_relocs (asection *sec, int count)
10742 {
10743 Elf_Internal_Rela *relocs;
10744 struct bfd_elf_section_data *elfsec_data;
10745
10746 elfsec_data = elf_section_data (sec);
10747 relocs = elfsec_data->relocs;
10748 if (relocs == NULL)
10749 {
10750 bfd_size_type relsize;
10751 relsize = sec->reloc_count * sizeof (*relocs);
10752 relocs = bfd_alloc (sec->owner, relsize);
10753 if (relocs == NULL)
10754 return NULL;
10755 elfsec_data->relocs = relocs;
10756 elfsec_data->rela.hdr = bfd_zalloc (sec->owner,
10757 sizeof (Elf_Internal_Shdr));
10758 if (elfsec_data->rela.hdr == NULL)
10759 return NULL;
10760 elfsec_data->rela.hdr->sh_size = (sec->reloc_count
10761 * sizeof (Elf64_External_Rela));
10762 elfsec_data->rela.hdr->sh_entsize = sizeof (Elf64_External_Rela);
10763 sec->reloc_count = 0;
10764 }
10765 relocs += sec->reloc_count;
10766 sec->reloc_count += count;
10767 return relocs;
10768 }
10769
10770 static bfd_vma
10771 get_r2off (struct bfd_link_info *info,
10772 struct ppc_stub_hash_entry *stub_entry)
10773 {
10774 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10775 bfd_vma r2off = htab->sec_info[stub_entry->target_section->id].toc_off;
10776
10777 if (r2off == 0)
10778 {
10779 /* Support linking -R objects. Get the toc pointer from the
10780 opd entry. */
10781 char buf[8];
10782 if (!htab->opd_abi)
10783 return r2off;
10784 asection *opd = stub_entry->h->elf.root.u.def.section;
10785 bfd_vma opd_off = stub_entry->h->elf.root.u.def.value;
10786
10787 if (strcmp (opd->name, ".opd") != 0
10788 || opd->reloc_count != 0)
10789 {
10790 info->callbacks->einfo (_("%P: cannot find opd entry toc for `%T'\n"),
10791 stub_entry->h->elf.root.root.string);
10792 bfd_set_error (bfd_error_bad_value);
10793 return (bfd_vma) -1;
10794 }
10795 if (!bfd_get_section_contents (opd->owner, opd, buf, opd_off + 8, 8))
10796 return (bfd_vma) -1;
10797 r2off = bfd_get_64 (opd->owner, buf);
10798 r2off -= elf_gp (info->output_bfd);
10799 }
10800 r2off -= htab->sec_info[stub_entry->group->link_sec->id].toc_off;
10801 return r2off;
10802 }
10803
10804 static bfd_boolean
10805 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
10806 {
10807 struct ppc_stub_hash_entry *stub_entry;
10808 struct ppc_branch_hash_entry *br_entry;
10809 struct bfd_link_info *info;
10810 struct ppc_link_hash_table *htab;
10811 bfd_byte *loc;
10812 bfd_byte *p;
10813 bfd_vma dest, off;
10814 int size;
10815 Elf_Internal_Rela *r;
10816 asection *plt;
10817
10818 /* Massage our args to the form they really have. */
10819 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
10820 info = in_arg;
10821
10822 htab = ppc_hash_table (info);
10823 if (htab == NULL)
10824 return FALSE;
10825
10826 /* Make a note of the offset within the stubs for this entry. */
10827 stub_entry->stub_offset = stub_entry->group->stub_sec->size;
10828 loc = stub_entry->group->stub_sec->contents + stub_entry->stub_offset;
10829
10830 htab->stub_count[stub_entry->stub_type - 1] += 1;
10831 switch (stub_entry->stub_type)
10832 {
10833 case ppc_stub_long_branch:
10834 case ppc_stub_long_branch_r2off:
10835 /* Branches are relative. This is where we are going to. */
10836 dest = (stub_entry->target_value
10837 + stub_entry->target_section->output_offset
10838 + stub_entry->target_section->output_section->vma);
10839 dest += PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
10840 off = dest;
10841
10842 /* And this is where we are coming from. */
10843 off -= (stub_entry->stub_offset
10844 + stub_entry->group->stub_sec->output_offset
10845 + stub_entry->group->stub_sec->output_section->vma);
10846
10847 size = 4;
10848 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
10849 {
10850 bfd_vma r2off = get_r2off (info, stub_entry);
10851
10852 if (r2off == (bfd_vma) -1)
10853 {
10854 htab->stub_error = TRUE;
10855 return FALSE;
10856 }
10857 bfd_put_32 (htab->params->stub_bfd, STD_R2_0R1 + STK_TOC (htab), loc);
10858 loc += 4;
10859 size = 8;
10860 if (PPC_HA (r2off) != 0)
10861 {
10862 bfd_put_32 (htab->params->stub_bfd,
10863 ADDIS_R2_R2 | PPC_HA (r2off), loc);
10864 loc += 4;
10865 size += 4;
10866 }
10867 if (PPC_LO (r2off) != 0)
10868 {
10869 bfd_put_32 (htab->params->stub_bfd,
10870 ADDI_R2_R2 | PPC_LO (r2off), loc);
10871 loc += 4;
10872 size += 4;
10873 }
10874 off -= size - 4;
10875 }
10876 bfd_put_32 (htab->params->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
10877
10878 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
10879 {
10880 info->callbacks->einfo
10881 (_("%P: long branch stub `%s' offset overflow\n"),
10882 stub_entry->root.string);
10883 htab->stub_error = TRUE;
10884 return FALSE;
10885 }
10886
10887 if (info->emitrelocations)
10888 {
10889 r = get_relocs (stub_entry->group->stub_sec, 1);
10890 if (r == NULL)
10891 return FALSE;
10892 r->r_offset = loc - stub_entry->group->stub_sec->contents;
10893 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
10894 r->r_addend = dest;
10895 if (stub_entry->h != NULL)
10896 {
10897 struct elf_link_hash_entry **hashes;
10898 unsigned long symndx;
10899 struct ppc_link_hash_entry *h;
10900
10901 hashes = elf_sym_hashes (htab->params->stub_bfd);
10902 if (hashes == NULL)
10903 {
10904 bfd_size_type hsize;
10905
10906 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
10907 hashes = bfd_zalloc (htab->params->stub_bfd, hsize);
10908 if (hashes == NULL)
10909 return FALSE;
10910 elf_sym_hashes (htab->params->stub_bfd) = hashes;
10911 htab->stub_globals = 1;
10912 }
10913 symndx = htab->stub_globals++;
10914 h = stub_entry->h;
10915 hashes[symndx] = &h->elf;
10916 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
10917 if (h->oh != NULL && h->oh->is_func)
10918 h = ppc_follow_link (h->oh);
10919 if (h->elf.root.u.def.section != stub_entry->target_section)
10920 /* H is an opd symbol. The addend must be zero. */
10921 r->r_addend = 0;
10922 else
10923 {
10924 off = (h->elf.root.u.def.value
10925 + h->elf.root.u.def.section->output_offset
10926 + h->elf.root.u.def.section->output_section->vma);
10927 r->r_addend -= off;
10928 }
10929 }
10930 }
10931 break;
10932
10933 case ppc_stub_plt_branch:
10934 case ppc_stub_plt_branch_r2off:
10935 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
10936 stub_entry->root.string + 9,
10937 FALSE, FALSE);
10938 if (br_entry == NULL)
10939 {
10940 info->callbacks->einfo (_("%P: can't find branch stub `%s'\n"),
10941 stub_entry->root.string);
10942 htab->stub_error = TRUE;
10943 return FALSE;
10944 }
10945
10946 dest = (stub_entry->target_value
10947 + stub_entry->target_section->output_offset
10948 + stub_entry->target_section->output_section->vma);
10949 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
10950 dest += PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
10951
10952 bfd_put_64 (htab->brlt->owner, dest,
10953 htab->brlt->contents + br_entry->offset);
10954
10955 if (br_entry->iter == htab->stub_iteration)
10956 {
10957 br_entry->iter = 0;
10958
10959 if (htab->relbrlt != NULL)
10960 {
10961 /* Create a reloc for the branch lookup table entry. */
10962 Elf_Internal_Rela rela;
10963 bfd_byte *rl;
10964
10965 rela.r_offset = (br_entry->offset
10966 + htab->brlt->output_offset
10967 + htab->brlt->output_section->vma);
10968 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
10969 rela.r_addend = dest;
10970
10971 rl = htab->relbrlt->contents;
10972 rl += (htab->relbrlt->reloc_count++
10973 * sizeof (Elf64_External_Rela));
10974 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
10975 }
10976 else if (info->emitrelocations)
10977 {
10978 r = get_relocs (htab->brlt, 1);
10979 if (r == NULL)
10980 return FALSE;
10981 /* brlt, being SEC_LINKER_CREATED does not go through the
10982 normal reloc processing. Symbols and offsets are not
10983 translated from input file to output file form, so
10984 set up the offset per the output file. */
10985 r->r_offset = (br_entry->offset
10986 + htab->brlt->output_offset
10987 + htab->brlt->output_section->vma);
10988 r->r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
10989 r->r_addend = dest;
10990 }
10991 }
10992
10993 dest = (br_entry->offset
10994 + htab->brlt->output_offset
10995 + htab->brlt->output_section->vma);
10996
10997 off = (dest
10998 - elf_gp (htab->brlt->output_section->owner)
10999 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11000
11001 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
11002 {
11003 info->callbacks->einfo
11004 (_("%P: linkage table error against `%T'\n"),
11005 stub_entry->root.string);
11006 bfd_set_error (bfd_error_bad_value);
11007 htab->stub_error = TRUE;
11008 return FALSE;
11009 }
11010
11011 if (info->emitrelocations)
11012 {
11013 r = get_relocs (stub_entry->group->stub_sec, 1 + (PPC_HA (off) != 0));
11014 if (r == NULL)
11015 return FALSE;
11016 r[0].r_offset = loc - stub_entry->group->stub_sec->contents;
11017 if (bfd_big_endian (info->output_bfd))
11018 r[0].r_offset += 2;
11019 if (stub_entry->stub_type == ppc_stub_plt_branch_r2off)
11020 r[0].r_offset += 4;
11021 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
11022 r[0].r_addend = dest;
11023 if (PPC_HA (off) != 0)
11024 {
11025 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
11026 r[1].r_offset = r[0].r_offset + 4;
11027 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
11028 r[1].r_addend = r[0].r_addend;
11029 }
11030 }
11031
11032 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
11033 {
11034 if (PPC_HA (off) != 0)
11035 {
11036 size = 16;
11037 bfd_put_32 (htab->params->stub_bfd,
11038 ADDIS_R12_R2 | PPC_HA (off), loc);
11039 loc += 4;
11040 bfd_put_32 (htab->params->stub_bfd,
11041 LD_R12_0R12 | PPC_LO (off), loc);
11042 }
11043 else
11044 {
11045 size = 12;
11046 bfd_put_32 (htab->params->stub_bfd,
11047 LD_R12_0R2 | PPC_LO (off), loc);
11048 }
11049 }
11050 else
11051 {
11052 bfd_vma r2off = get_r2off (info, stub_entry);
11053
11054 if (r2off == (bfd_vma) -1)
11055 {
11056 htab->stub_error = TRUE;
11057 return FALSE;
11058 }
11059
11060 bfd_put_32 (htab->params->stub_bfd, STD_R2_0R1 + STK_TOC (htab), loc);
11061 loc += 4;
11062 size = 16;
11063 if (PPC_HA (off) != 0)
11064 {
11065 size += 4;
11066 bfd_put_32 (htab->params->stub_bfd,
11067 ADDIS_R12_R2 | PPC_HA (off), loc);
11068 loc += 4;
11069 bfd_put_32 (htab->params->stub_bfd,
11070 LD_R12_0R12 | PPC_LO (off), loc);
11071 }
11072 else
11073 bfd_put_32 (htab->params->stub_bfd, LD_R12_0R2 | PPC_LO (off), loc);
11074
11075 if (PPC_HA (r2off) != 0)
11076 {
11077 size += 4;
11078 loc += 4;
11079 bfd_put_32 (htab->params->stub_bfd,
11080 ADDIS_R2_R2 | PPC_HA (r2off), loc);
11081 }
11082 if (PPC_LO (r2off) != 0)
11083 {
11084 size += 4;
11085 loc += 4;
11086 bfd_put_32 (htab->params->stub_bfd,
11087 ADDI_R2_R2 | PPC_LO (r2off), loc);
11088 }
11089 }
11090 loc += 4;
11091 bfd_put_32 (htab->params->stub_bfd, MTCTR_R12, loc);
11092 loc += 4;
11093 bfd_put_32 (htab->params->stub_bfd, BCTR, loc);
11094 break;
11095
11096 case ppc_stub_plt_call:
11097 case ppc_stub_plt_call_r2save:
11098 if (stub_entry->h != NULL
11099 && stub_entry->h->is_func_descriptor
11100 && stub_entry->h->oh != NULL)
11101 {
11102 struct ppc_link_hash_entry *fh = ppc_follow_link (stub_entry->h->oh);
11103
11104 /* If the old-ABI "dot-symbol" is undefined make it weak so
11105 we don't get a link error from RELOC_FOR_GLOBAL_SYMBOL. */
11106 if (fh->elf.root.type == bfd_link_hash_undefined
11107 && (stub_entry->h->elf.root.type == bfd_link_hash_defined
11108 || stub_entry->h->elf.root.type == bfd_link_hash_defweak))
11109 fh->elf.root.type = bfd_link_hash_undefweak;
11110 }
11111
11112 /* Now build the stub. */
11113 dest = stub_entry->plt_ent->plt.offset & ~1;
11114 if (dest >= (bfd_vma) -2)
11115 abort ();
11116
11117 plt = htab->elf.splt;
11118 if (!htab->elf.dynamic_sections_created
11119 || stub_entry->h == NULL
11120 || stub_entry->h->elf.dynindx == -1)
11121 plt = htab->elf.iplt;
11122
11123 dest += plt->output_offset + plt->output_section->vma;
11124
11125 if (stub_entry->h == NULL
11126 && (stub_entry->plt_ent->plt.offset & 1) == 0)
11127 {
11128 Elf_Internal_Rela rela;
11129 bfd_byte *rl;
11130
11131 rela.r_offset = dest;
11132 if (htab->opd_abi)
11133 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
11134 else
11135 rela.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
11136 rela.r_addend = (stub_entry->target_value
11137 + stub_entry->target_section->output_offset
11138 + stub_entry->target_section->output_section->vma);
11139
11140 rl = (htab->elf.irelplt->contents
11141 + (htab->elf.irelplt->reloc_count++
11142 * sizeof (Elf64_External_Rela)));
11143 bfd_elf64_swap_reloca_out (info->output_bfd, &rela, rl);
11144 stub_entry->plt_ent->plt.offset |= 1;
11145 htab->local_ifunc_resolver = 1;
11146 }
11147
11148 off = (dest
11149 - elf_gp (plt->output_section->owner)
11150 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11151
11152 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
11153 {
11154 info->callbacks->einfo
11155 /* xgettext:c-format */
11156 (_("%P: linkage table error against `%T'\n"),
11157 stub_entry->h != NULL
11158 ? stub_entry->h->elf.root.root.string
11159 : "<local sym>");
11160 bfd_set_error (bfd_error_bad_value);
11161 htab->stub_error = TRUE;
11162 return FALSE;
11163 }
11164
11165 if (htab->params->plt_stub_align != 0)
11166 {
11167 unsigned pad = plt_stub_pad (htab, stub_entry, off);
11168
11169 stub_entry->group->stub_sec->size += pad;
11170 stub_entry->stub_offset = stub_entry->group->stub_sec->size;
11171 loc += pad;
11172 }
11173
11174 r = NULL;
11175 if (info->emitrelocations)
11176 {
11177 r = get_relocs (stub_entry->group->stub_sec,
11178 ((PPC_HA (off) != 0)
11179 + (htab->opd_abi
11180 ? 2 + (htab->params->plt_static_chain
11181 && PPC_HA (off + 16) == PPC_HA (off))
11182 : 1)));
11183 if (r == NULL)
11184 return FALSE;
11185 r[0].r_offset = loc - stub_entry->group->stub_sec->contents;
11186 if (bfd_big_endian (info->output_bfd))
11187 r[0].r_offset += 2;
11188 r[0].r_addend = dest;
11189 }
11190 if (stub_entry->h != NULL
11191 && (stub_entry->h == htab->tls_get_addr_fd
11192 || stub_entry->h == htab->tls_get_addr)
11193 && htab->params->tls_get_addr_opt)
11194 p = build_tls_get_addr_stub (htab, stub_entry, loc, off, r);
11195 else
11196 p = build_plt_stub (htab, stub_entry, loc, off, r);
11197 size = p - loc;
11198 break;
11199
11200 case ppc_stub_save_res:
11201 return TRUE;
11202
11203 default:
11204 BFD_FAIL ();
11205 return FALSE;
11206 }
11207
11208 stub_entry->group->stub_sec->size += size;
11209
11210 if (htab->params->emit_stub_syms)
11211 {
11212 struct elf_link_hash_entry *h;
11213 size_t len1, len2;
11214 char *name;
11215 const char *const stub_str[] = { "long_branch",
11216 "long_branch_r2off",
11217 "plt_branch",
11218 "plt_branch_r2off",
11219 "plt_call",
11220 "plt_call" };
11221
11222 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
11223 len2 = strlen (stub_entry->root.string);
11224 name = bfd_malloc (len1 + len2 + 2);
11225 if (name == NULL)
11226 return FALSE;
11227 memcpy (name, stub_entry->root.string, 9);
11228 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
11229 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
11230 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
11231 if (h == NULL)
11232 return FALSE;
11233 if (h->root.type == bfd_link_hash_new)
11234 {
11235 h->root.type = bfd_link_hash_defined;
11236 h->root.u.def.section = stub_entry->group->stub_sec;
11237 h->root.u.def.value = stub_entry->stub_offset;
11238 h->ref_regular = 1;
11239 h->def_regular = 1;
11240 h->ref_regular_nonweak = 1;
11241 h->forced_local = 1;
11242 h->non_elf = 0;
11243 h->root.linker_def = 1;
11244 }
11245 }
11246
11247 return TRUE;
11248 }
11249
11250 /* As above, but don't actually build the stub. Just bump offset so
11251 we know stub section sizes, and select plt_branch stubs where
11252 long_branch stubs won't do. */
11253
11254 static bfd_boolean
11255 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
11256 {
11257 struct ppc_stub_hash_entry *stub_entry;
11258 struct bfd_link_info *info;
11259 struct ppc_link_hash_table *htab;
11260 bfd_vma off;
11261 int size;
11262
11263 /* Massage our args to the form they really have. */
11264 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
11265 info = in_arg;
11266
11267 htab = ppc_hash_table (info);
11268 if (htab == NULL)
11269 return FALSE;
11270
11271 if (stub_entry->h != NULL
11272 && stub_entry->h->save_res
11273 && stub_entry->h->elf.root.type == bfd_link_hash_defined
11274 && stub_entry->h->elf.root.u.def.section == htab->sfpr)
11275 {
11276 /* Don't make stubs to out-of-line register save/restore
11277 functions. Instead, emit copies of the functions. */
11278 stub_entry->group->needs_save_res = 1;
11279 stub_entry->stub_type = ppc_stub_save_res;
11280 return TRUE;
11281 }
11282
11283 if (stub_entry->stub_type == ppc_stub_plt_call
11284 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
11285 {
11286 asection *plt;
11287 off = stub_entry->plt_ent->plt.offset & ~(bfd_vma) 1;
11288 if (off >= (bfd_vma) -2)
11289 abort ();
11290 plt = htab->elf.splt;
11291 if (!htab->elf.dynamic_sections_created
11292 || stub_entry->h == NULL
11293 || stub_entry->h->elf.dynindx == -1)
11294 plt = htab->elf.iplt;
11295 off += (plt->output_offset
11296 + plt->output_section->vma
11297 - elf_gp (plt->output_section->owner)
11298 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11299
11300 size = plt_stub_size (htab, stub_entry, off);
11301 if (stub_entry->h != NULL
11302 && (stub_entry->h == htab->tls_get_addr_fd
11303 || stub_entry->h == htab->tls_get_addr)
11304 && htab->params->tls_get_addr_opt
11305 && (ALWAYS_EMIT_R2SAVE
11306 || stub_entry->stub_type == ppc_stub_plt_call_r2save))
11307 stub_entry->group->tls_get_addr_opt_bctrl
11308 = stub_entry->group->stub_sec->size + size - 5 * 4;
11309
11310 if (htab->params->plt_stub_align)
11311 size += plt_stub_pad (htab, stub_entry, off);
11312 if (info->emitrelocations)
11313 {
11314 stub_entry->group->stub_sec->reloc_count
11315 += ((PPC_HA (off) != 0)
11316 + (htab->opd_abi
11317 ? 2 + (htab->params->plt_static_chain
11318 && PPC_HA (off + 16) == PPC_HA (off))
11319 : 1));
11320 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11321 }
11322 }
11323 else
11324 {
11325 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
11326 variants. */
11327 bfd_vma r2off = 0;
11328 bfd_vma local_off = 0;
11329
11330 off = (stub_entry->target_value
11331 + stub_entry->target_section->output_offset
11332 + stub_entry->target_section->output_section->vma);
11333 off -= (stub_entry->group->stub_sec->size
11334 + stub_entry->group->stub_sec->output_offset
11335 + stub_entry->group->stub_sec->output_section->vma);
11336
11337 /* Reset the stub type from the plt variant in case we now
11338 can reach with a shorter stub. */
11339 if (stub_entry->stub_type >= ppc_stub_plt_branch)
11340 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
11341
11342 size = 4;
11343 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
11344 {
11345 r2off = get_r2off (info, stub_entry);
11346 if (r2off == (bfd_vma) -1)
11347 {
11348 htab->stub_error = TRUE;
11349 return FALSE;
11350 }
11351 size = 8;
11352 if (PPC_HA (r2off) != 0)
11353 size += 4;
11354 if (PPC_LO (r2off) != 0)
11355 size += 4;
11356 off -= size - 4;
11357 }
11358
11359 local_off = PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
11360
11361 /* If the branch offset if too big, use a ppc_stub_plt_branch.
11362 Do the same for -R objects without function descriptors. */
11363 if (off + (1 << 25) >= (bfd_vma) (1 << 26) - local_off
11364 || (stub_entry->stub_type == ppc_stub_long_branch_r2off
11365 && r2off == 0
11366 && htab->sec_info[stub_entry->target_section->id].toc_off == 0))
11367 {
11368 struct ppc_branch_hash_entry *br_entry;
11369
11370 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
11371 stub_entry->root.string + 9,
11372 TRUE, FALSE);
11373 if (br_entry == NULL)
11374 {
11375 info->callbacks->einfo (_("%P: can't build branch stub `%s'\n"),
11376 stub_entry->root.string);
11377 htab->stub_error = TRUE;
11378 return FALSE;
11379 }
11380
11381 if (br_entry->iter != htab->stub_iteration)
11382 {
11383 br_entry->iter = htab->stub_iteration;
11384 br_entry->offset = htab->brlt->size;
11385 htab->brlt->size += 8;
11386
11387 if (htab->relbrlt != NULL)
11388 htab->relbrlt->size += sizeof (Elf64_External_Rela);
11389 else if (info->emitrelocations)
11390 {
11391 htab->brlt->reloc_count += 1;
11392 htab->brlt->flags |= SEC_RELOC;
11393 }
11394 }
11395
11396 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
11397 off = (br_entry->offset
11398 + htab->brlt->output_offset
11399 + htab->brlt->output_section->vma
11400 - elf_gp (htab->brlt->output_section->owner)
11401 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11402
11403 if (info->emitrelocations)
11404 {
11405 stub_entry->group->stub_sec->reloc_count
11406 += 1 + (PPC_HA (off) != 0);
11407 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11408 }
11409
11410 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
11411 {
11412 size = 12;
11413 if (PPC_HA (off) != 0)
11414 size = 16;
11415 }
11416 else
11417 {
11418 size = 16;
11419 if (PPC_HA (off) != 0)
11420 size += 4;
11421
11422 if (PPC_HA (r2off) != 0)
11423 size += 4;
11424 if (PPC_LO (r2off) != 0)
11425 size += 4;
11426 }
11427 }
11428 else if (info->emitrelocations)
11429 {
11430 stub_entry->group->stub_sec->reloc_count += 1;
11431 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11432 }
11433 }
11434
11435 stub_entry->group->stub_sec->size += size;
11436 return TRUE;
11437 }
11438
11439 /* Set up various things so that we can make a list of input sections
11440 for each output section included in the link. Returns -1 on error,
11441 0 when no stubs will be needed, and 1 on success. */
11442
11443 int
11444 ppc64_elf_setup_section_lists (struct bfd_link_info *info)
11445 {
11446 unsigned int id;
11447 bfd_size_type amt;
11448 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11449
11450 if (htab == NULL)
11451 return -1;
11452
11453 htab->sec_info_arr_size = bfd_get_next_section_id ();
11454 amt = sizeof (*htab->sec_info) * (htab->sec_info_arr_size);
11455 htab->sec_info = bfd_zmalloc (amt);
11456 if (htab->sec_info == NULL)
11457 return -1;
11458
11459 /* Set toc_off for com, und, abs and ind sections. */
11460 for (id = 0; id < 3; id++)
11461 htab->sec_info[id].toc_off = TOC_BASE_OFF;
11462
11463 return 1;
11464 }
11465
11466 /* Set up for first pass at multitoc partitioning. */
11467
11468 void
11469 ppc64_elf_start_multitoc_partition (struct bfd_link_info *info)
11470 {
11471 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11472
11473 htab->toc_curr = ppc64_elf_set_toc (info, info->output_bfd);
11474 htab->toc_bfd = NULL;
11475 htab->toc_first_sec = NULL;
11476 }
11477
11478 /* The linker repeatedly calls this function for each TOC input section
11479 and linker generated GOT section. Group input bfds such that the toc
11480 within a group is less than 64k in size. */
11481
11482 bfd_boolean
11483 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
11484 {
11485 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11486 bfd_vma addr, off, limit;
11487
11488 if (htab == NULL)
11489 return FALSE;
11490
11491 if (!htab->second_toc_pass)
11492 {
11493 /* Keep track of the first .toc or .got section for this input bfd. */
11494 bfd_boolean new_bfd = htab->toc_bfd != isec->owner;
11495
11496 if (new_bfd)
11497 {
11498 htab->toc_bfd = isec->owner;
11499 htab->toc_first_sec = isec;
11500 }
11501
11502 addr = isec->output_offset + isec->output_section->vma;
11503 off = addr - htab->toc_curr;
11504 limit = 0x80008000;
11505 if (ppc64_elf_tdata (isec->owner)->has_small_toc_reloc)
11506 limit = 0x10000;
11507 if (off + isec->size > limit)
11508 {
11509 addr = (htab->toc_first_sec->output_offset
11510 + htab->toc_first_sec->output_section->vma);
11511 htab->toc_curr = addr;
11512 htab->toc_curr &= -TOC_BASE_ALIGN;
11513 }
11514
11515 /* toc_curr is the base address of this toc group. Set elf_gp
11516 for the input section to be the offset relative to the
11517 output toc base plus 0x8000. Making the input elf_gp an
11518 offset allows us to move the toc as a whole without
11519 recalculating input elf_gp. */
11520 off = htab->toc_curr - elf_gp (isec->output_section->owner);
11521 off += TOC_BASE_OFF;
11522
11523 /* Die if someone uses a linker script that doesn't keep input
11524 file .toc and .got together. */
11525 if (new_bfd
11526 && elf_gp (isec->owner) != 0
11527 && elf_gp (isec->owner) != off)
11528 return FALSE;
11529
11530 elf_gp (isec->owner) = off;
11531 return TRUE;
11532 }
11533
11534 /* During the second pass toc_first_sec points to the start of
11535 a toc group, and toc_curr is used to track the old elf_gp.
11536 We use toc_bfd to ensure we only look at each bfd once. */
11537 if (htab->toc_bfd == isec->owner)
11538 return TRUE;
11539 htab->toc_bfd = isec->owner;
11540
11541 if (htab->toc_first_sec == NULL
11542 || htab->toc_curr != elf_gp (isec->owner))
11543 {
11544 htab->toc_curr = elf_gp (isec->owner);
11545 htab->toc_first_sec = isec;
11546 }
11547 addr = (htab->toc_first_sec->output_offset
11548 + htab->toc_first_sec->output_section->vma);
11549 off = addr - elf_gp (isec->output_section->owner) + TOC_BASE_OFF;
11550 elf_gp (isec->owner) = off;
11551
11552 return TRUE;
11553 }
11554
11555 /* Called via elf_link_hash_traverse to merge GOT entries for global
11556 symbol H. */
11557
11558 static bfd_boolean
11559 merge_global_got (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
11560 {
11561 if (h->root.type == bfd_link_hash_indirect)
11562 return TRUE;
11563
11564 merge_got_entries (&h->got.glist);
11565
11566 return TRUE;
11567 }
11568
11569 /* Called via elf_link_hash_traverse to allocate GOT entries for global
11570 symbol H. */
11571
11572 static bfd_boolean
11573 reallocate_got (struct elf_link_hash_entry *h, void *inf)
11574 {
11575 struct got_entry *gent;
11576
11577 if (h->root.type == bfd_link_hash_indirect)
11578 return TRUE;
11579
11580 for (gent = h->got.glist; gent != NULL; gent = gent->next)
11581 if (!gent->is_indirect)
11582 allocate_got (h, (struct bfd_link_info *) inf, gent);
11583 return TRUE;
11584 }
11585
11586 /* Called on the first multitoc pass after the last call to
11587 ppc64_elf_next_toc_section. This function removes duplicate GOT
11588 entries. */
11589
11590 bfd_boolean
11591 ppc64_elf_layout_multitoc (struct bfd_link_info *info)
11592 {
11593 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11594 struct bfd *ibfd, *ibfd2;
11595 bfd_boolean done_something;
11596
11597 htab->multi_toc_needed = htab->toc_curr != elf_gp (info->output_bfd);
11598
11599 if (!htab->do_multi_toc)
11600 return FALSE;
11601
11602 /* Merge global sym got entries within a toc group. */
11603 elf_link_hash_traverse (&htab->elf, merge_global_got, info);
11604
11605 /* And tlsld_got. */
11606 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11607 {
11608 struct got_entry *ent, *ent2;
11609
11610 if (!is_ppc64_elf (ibfd))
11611 continue;
11612
11613 ent = ppc64_tlsld_got (ibfd);
11614 if (!ent->is_indirect
11615 && ent->got.offset != (bfd_vma) -1)
11616 {
11617 for (ibfd2 = ibfd->link.next; ibfd2 != NULL; ibfd2 = ibfd2->link.next)
11618 {
11619 if (!is_ppc64_elf (ibfd2))
11620 continue;
11621
11622 ent2 = ppc64_tlsld_got (ibfd2);
11623 if (!ent2->is_indirect
11624 && ent2->got.offset != (bfd_vma) -1
11625 && elf_gp (ibfd2) == elf_gp (ibfd))
11626 {
11627 ent2->is_indirect = TRUE;
11628 ent2->got.ent = ent;
11629 }
11630 }
11631 }
11632 }
11633
11634 /* Zap sizes of got sections. */
11635 htab->elf.irelplt->rawsize = htab->elf.irelplt->size;
11636 htab->elf.irelplt->size -= htab->got_reli_size;
11637 htab->got_reli_size = 0;
11638
11639 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11640 {
11641 asection *got, *relgot;
11642
11643 if (!is_ppc64_elf (ibfd))
11644 continue;
11645
11646 got = ppc64_elf_tdata (ibfd)->got;
11647 if (got != NULL)
11648 {
11649 got->rawsize = got->size;
11650 got->size = 0;
11651 relgot = ppc64_elf_tdata (ibfd)->relgot;
11652 relgot->rawsize = relgot->size;
11653 relgot->size = 0;
11654 }
11655 }
11656
11657 /* Now reallocate the got, local syms first. We don't need to
11658 allocate section contents again since we never increase size. */
11659 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11660 {
11661 struct got_entry **lgot_ents;
11662 struct got_entry **end_lgot_ents;
11663 struct plt_entry **local_plt;
11664 struct plt_entry **end_local_plt;
11665 unsigned char *lgot_masks;
11666 bfd_size_type locsymcount;
11667 Elf_Internal_Shdr *symtab_hdr;
11668 asection *s;
11669
11670 if (!is_ppc64_elf (ibfd))
11671 continue;
11672
11673 lgot_ents = elf_local_got_ents (ibfd);
11674 if (!lgot_ents)
11675 continue;
11676
11677 symtab_hdr = &elf_symtab_hdr (ibfd);
11678 locsymcount = symtab_hdr->sh_info;
11679 end_lgot_ents = lgot_ents + locsymcount;
11680 local_plt = (struct plt_entry **) end_lgot_ents;
11681 end_local_plt = local_plt + locsymcount;
11682 lgot_masks = (unsigned char *) end_local_plt;
11683 s = ppc64_elf_tdata (ibfd)->got;
11684 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
11685 {
11686 struct got_entry *ent;
11687
11688 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
11689 {
11690 unsigned int ent_size = 8;
11691 unsigned int rel_size = sizeof (Elf64_External_Rela);
11692
11693 ent->got.offset = s->size;
11694 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
11695 {
11696 ent_size *= 2;
11697 rel_size *= 2;
11698 }
11699 s->size += ent_size;
11700 if ((*lgot_masks & PLT_IFUNC) != 0)
11701 {
11702 htab->elf.irelplt->size += rel_size;
11703 htab->got_reli_size += rel_size;
11704 }
11705 else if (bfd_link_pic (info))
11706 {
11707 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
11708 srel->size += rel_size;
11709 }
11710 }
11711 }
11712 }
11713
11714 elf_link_hash_traverse (&htab->elf, reallocate_got, info);
11715
11716 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11717 {
11718 struct got_entry *ent;
11719
11720 if (!is_ppc64_elf (ibfd))
11721 continue;
11722
11723 ent = ppc64_tlsld_got (ibfd);
11724 if (!ent->is_indirect
11725 && ent->got.offset != (bfd_vma) -1)
11726 {
11727 asection *s = ppc64_elf_tdata (ibfd)->got;
11728 ent->got.offset = s->size;
11729 s->size += 16;
11730 if (bfd_link_pic (info))
11731 {
11732 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
11733 srel->size += sizeof (Elf64_External_Rela);
11734 }
11735 }
11736 }
11737
11738 done_something = htab->elf.irelplt->rawsize != htab->elf.irelplt->size;
11739 if (!done_something)
11740 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11741 {
11742 asection *got;
11743
11744 if (!is_ppc64_elf (ibfd))
11745 continue;
11746
11747 got = ppc64_elf_tdata (ibfd)->got;
11748 if (got != NULL)
11749 {
11750 done_something = got->rawsize != got->size;
11751 if (done_something)
11752 break;
11753 }
11754 }
11755
11756 if (done_something)
11757 (*htab->params->layout_sections_again) ();
11758
11759 /* Set up for second pass over toc sections to recalculate elf_gp
11760 on input sections. */
11761 htab->toc_bfd = NULL;
11762 htab->toc_first_sec = NULL;
11763 htab->second_toc_pass = TRUE;
11764 return done_something;
11765 }
11766
11767 /* Called after second pass of multitoc partitioning. */
11768
11769 void
11770 ppc64_elf_finish_multitoc_partition (struct bfd_link_info *info)
11771 {
11772 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11773
11774 /* After the second pass, toc_curr tracks the TOC offset used
11775 for code sections below in ppc64_elf_next_input_section. */
11776 htab->toc_curr = TOC_BASE_OFF;
11777 }
11778
11779 /* No toc references were found in ISEC. If the code in ISEC makes no
11780 calls, then there's no need to use toc adjusting stubs when branching
11781 into ISEC. Actually, indirect calls from ISEC are OK as they will
11782 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
11783 needed, and 2 if a cyclical call-graph was found but no other reason
11784 for a stub was detected. If called from the top level, a return of
11785 2 means the same as a return of 0. */
11786
11787 static int
11788 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
11789 {
11790 int ret;
11791
11792 /* Mark this section as checked. */
11793 isec->call_check_done = 1;
11794
11795 /* We know none of our code bearing sections will need toc stubs. */
11796 if ((isec->flags & SEC_LINKER_CREATED) != 0)
11797 return 0;
11798
11799 if (isec->size == 0)
11800 return 0;
11801
11802 if (isec->output_section == NULL)
11803 return 0;
11804
11805 ret = 0;
11806 if (isec->reloc_count != 0)
11807 {
11808 Elf_Internal_Rela *relstart, *rel;
11809 Elf_Internal_Sym *local_syms;
11810 struct ppc_link_hash_table *htab;
11811
11812 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
11813 info->keep_memory);
11814 if (relstart == NULL)
11815 return -1;
11816
11817 /* Look for branches to outside of this section. */
11818 local_syms = NULL;
11819 htab = ppc_hash_table (info);
11820 if (htab == NULL)
11821 return -1;
11822
11823 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
11824 {
11825 enum elf_ppc64_reloc_type r_type;
11826 unsigned long r_symndx;
11827 struct elf_link_hash_entry *h;
11828 struct ppc_link_hash_entry *eh;
11829 Elf_Internal_Sym *sym;
11830 asection *sym_sec;
11831 struct _opd_sec_data *opd;
11832 bfd_vma sym_value;
11833 bfd_vma dest;
11834
11835 r_type = ELF64_R_TYPE (rel->r_info);
11836 if (r_type != R_PPC64_REL24
11837 && r_type != R_PPC64_REL14
11838 && r_type != R_PPC64_REL14_BRTAKEN
11839 && r_type != R_PPC64_REL14_BRNTAKEN)
11840 continue;
11841
11842 r_symndx = ELF64_R_SYM (rel->r_info);
11843 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
11844 isec->owner))
11845 {
11846 ret = -1;
11847 break;
11848 }
11849
11850 /* Calls to dynamic lib functions go through a plt call stub
11851 that uses r2. */
11852 eh = (struct ppc_link_hash_entry *) h;
11853 if (eh != NULL
11854 && (eh->elf.plt.plist != NULL
11855 || (eh->oh != NULL
11856 && ppc_follow_link (eh->oh)->elf.plt.plist != NULL)))
11857 {
11858 ret = 1;
11859 break;
11860 }
11861
11862 if (sym_sec == NULL)
11863 /* Ignore other undefined symbols. */
11864 continue;
11865
11866 /* Assume branches to other sections not included in the
11867 link need stubs too, to cover -R and absolute syms. */
11868 if (sym_sec->output_section == NULL)
11869 {
11870 ret = 1;
11871 break;
11872 }
11873
11874 if (h == NULL)
11875 sym_value = sym->st_value;
11876 else
11877 {
11878 if (h->root.type != bfd_link_hash_defined
11879 && h->root.type != bfd_link_hash_defweak)
11880 abort ();
11881 sym_value = h->root.u.def.value;
11882 }
11883 sym_value += rel->r_addend;
11884
11885 /* If this branch reloc uses an opd sym, find the code section. */
11886 opd = get_opd_info (sym_sec);
11887 if (opd != NULL)
11888 {
11889 if (h == NULL && opd->adjust != NULL)
11890 {
11891 long adjust;
11892
11893 adjust = opd->adjust[OPD_NDX (sym_value)];
11894 if (adjust == -1)
11895 /* Assume deleted functions won't ever be called. */
11896 continue;
11897 sym_value += adjust;
11898 }
11899
11900 dest = opd_entry_value (sym_sec, sym_value,
11901 &sym_sec, NULL, FALSE);
11902 if (dest == (bfd_vma) -1)
11903 continue;
11904 }
11905 else
11906 dest = (sym_value
11907 + sym_sec->output_offset
11908 + sym_sec->output_section->vma);
11909
11910 /* Ignore branch to self. */
11911 if (sym_sec == isec)
11912 continue;
11913
11914 /* If the called function uses the toc, we need a stub. */
11915 if (sym_sec->has_toc_reloc
11916 || sym_sec->makes_toc_func_call)
11917 {
11918 ret = 1;
11919 break;
11920 }
11921
11922 /* Assume any branch that needs a long branch stub might in fact
11923 need a plt_branch stub. A plt_branch stub uses r2. */
11924 else if (dest - (isec->output_offset
11925 + isec->output_section->vma
11926 + rel->r_offset) + (1 << 25)
11927 >= (2u << 25) - PPC64_LOCAL_ENTRY_OFFSET (h
11928 ? h->other
11929 : sym->st_other))
11930 {
11931 ret = 1;
11932 break;
11933 }
11934
11935 /* If calling back to a section in the process of being
11936 tested, we can't say for sure that no toc adjusting stubs
11937 are needed, so don't return zero. */
11938 else if (sym_sec->call_check_in_progress)
11939 ret = 2;
11940
11941 /* Branches to another section that itself doesn't have any TOC
11942 references are OK. Recursively call ourselves to check. */
11943 else if (!sym_sec->call_check_done)
11944 {
11945 int recur;
11946
11947 /* Mark current section as indeterminate, so that other
11948 sections that call back to current won't be marked as
11949 known. */
11950 isec->call_check_in_progress = 1;
11951 recur = toc_adjusting_stub_needed (info, sym_sec);
11952 isec->call_check_in_progress = 0;
11953
11954 if (recur != 0)
11955 {
11956 ret = recur;
11957 if (recur != 2)
11958 break;
11959 }
11960 }
11961 }
11962
11963 if (local_syms != NULL
11964 && (elf_symtab_hdr (isec->owner).contents
11965 != (unsigned char *) local_syms))
11966 free (local_syms);
11967 if (elf_section_data (isec)->relocs != relstart)
11968 free (relstart);
11969 }
11970
11971 if ((ret & 1) == 0
11972 && isec->map_head.s != NULL
11973 && (strcmp (isec->output_section->name, ".init") == 0
11974 || strcmp (isec->output_section->name, ".fini") == 0))
11975 {
11976 if (isec->map_head.s->has_toc_reloc
11977 || isec->map_head.s->makes_toc_func_call)
11978 ret = 1;
11979 else if (!isec->map_head.s->call_check_done)
11980 {
11981 int recur;
11982 isec->call_check_in_progress = 1;
11983 recur = toc_adjusting_stub_needed (info, isec->map_head.s);
11984 isec->call_check_in_progress = 0;
11985 if (recur != 0)
11986 ret = recur;
11987 }
11988 }
11989
11990 if (ret == 1)
11991 isec->makes_toc_func_call = 1;
11992
11993 return ret;
11994 }
11995
11996 /* The linker repeatedly calls this function for each input section,
11997 in the order that input sections are linked into output sections.
11998 Build lists of input sections to determine groupings between which
11999 we may insert linker stubs. */
12000
12001 bfd_boolean
12002 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
12003 {
12004 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12005
12006 if (htab == NULL)
12007 return FALSE;
12008
12009 if ((isec->output_section->flags & SEC_CODE) != 0
12010 && isec->output_section->id < htab->sec_info_arr_size)
12011 {
12012 /* This happens to make the list in reverse order,
12013 which is what we want. */
12014 htab->sec_info[isec->id].u.list
12015 = htab->sec_info[isec->output_section->id].u.list;
12016 htab->sec_info[isec->output_section->id].u.list = isec;
12017 }
12018
12019 if (htab->multi_toc_needed)
12020 {
12021 /* Analyse sections that aren't already flagged as needing a
12022 valid toc pointer. Exclude .fixup for the linux kernel.
12023 .fixup contains branches, but only back to the function that
12024 hit an exception. */
12025 if (!(isec->has_toc_reloc
12026 || (isec->flags & SEC_CODE) == 0
12027 || strcmp (isec->name, ".fixup") == 0
12028 || isec->call_check_done))
12029 {
12030 if (toc_adjusting_stub_needed (info, isec) < 0)
12031 return FALSE;
12032 }
12033 /* Make all sections use the TOC assigned for this object file.
12034 This will be wrong for pasted sections; We fix that in
12035 check_pasted_section(). */
12036 if (elf_gp (isec->owner) != 0)
12037 htab->toc_curr = elf_gp (isec->owner);
12038 }
12039
12040 htab->sec_info[isec->id].toc_off = htab->toc_curr;
12041 return TRUE;
12042 }
12043
12044 /* Check that all .init and .fini sections use the same toc, if they
12045 have toc relocs. */
12046
12047 static bfd_boolean
12048 check_pasted_section (struct bfd_link_info *info, const char *name)
12049 {
12050 asection *o = bfd_get_section_by_name (info->output_bfd, name);
12051
12052 if (o != NULL)
12053 {
12054 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12055 bfd_vma toc_off = 0;
12056 asection *i;
12057
12058 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
12059 if (i->has_toc_reloc)
12060 {
12061 if (toc_off == 0)
12062 toc_off = htab->sec_info[i->id].toc_off;
12063 else if (toc_off != htab->sec_info[i->id].toc_off)
12064 return FALSE;
12065 }
12066
12067 if (toc_off == 0)
12068 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
12069 if (i->makes_toc_func_call)
12070 {
12071 toc_off = htab->sec_info[i->id].toc_off;
12072 break;
12073 }
12074
12075 /* Make sure the whole pasted function uses the same toc offset. */
12076 if (toc_off != 0)
12077 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
12078 htab->sec_info[i->id].toc_off = toc_off;
12079 }
12080 return TRUE;
12081 }
12082
12083 bfd_boolean
12084 ppc64_elf_check_init_fini (struct bfd_link_info *info)
12085 {
12086 return (check_pasted_section (info, ".init")
12087 & check_pasted_section (info, ".fini"));
12088 }
12089
12090 /* See whether we can group stub sections together. Grouping stub
12091 sections may result in fewer stubs. More importantly, we need to
12092 put all .init* and .fini* stubs at the beginning of the .init or
12093 .fini output sections respectively, because glibc splits the
12094 _init and _fini functions into multiple parts. Putting a stub in
12095 the middle of a function is not a good idea. */
12096
12097 static bfd_boolean
12098 group_sections (struct bfd_link_info *info,
12099 bfd_size_type stub_group_size,
12100 bfd_boolean stubs_always_before_branch)
12101 {
12102 struct ppc_link_hash_table *htab;
12103 asection *osec;
12104 bfd_boolean suppress_size_errors;
12105
12106 htab = ppc_hash_table (info);
12107 if (htab == NULL)
12108 return FALSE;
12109
12110 suppress_size_errors = FALSE;
12111 if (stub_group_size == 1)
12112 {
12113 /* Default values. */
12114 if (stubs_always_before_branch)
12115 stub_group_size = 0x1e00000;
12116 else
12117 stub_group_size = 0x1c00000;
12118 suppress_size_errors = TRUE;
12119 }
12120
12121 for (osec = info->output_bfd->sections; osec != NULL; osec = osec->next)
12122 {
12123 asection *tail;
12124
12125 if (osec->id >= htab->sec_info_arr_size)
12126 continue;
12127
12128 tail = htab->sec_info[osec->id].u.list;
12129 while (tail != NULL)
12130 {
12131 asection *curr;
12132 asection *prev;
12133 bfd_size_type total;
12134 bfd_boolean big_sec;
12135 bfd_vma curr_toc;
12136 struct map_stub *group;
12137 bfd_size_type group_size;
12138
12139 curr = tail;
12140 total = tail->size;
12141 group_size = (ppc64_elf_section_data (tail) != NULL
12142 && ppc64_elf_section_data (tail)->has_14bit_branch
12143 ? stub_group_size >> 10 : stub_group_size);
12144
12145 big_sec = total > group_size;
12146 if (big_sec && !suppress_size_errors)
12147 /* xgettext:c-format */
12148 _bfd_error_handler (_("%B section %A exceeds stub group size"),
12149 tail->owner, tail);
12150 curr_toc = htab->sec_info[tail->id].toc_off;
12151
12152 while ((prev = htab->sec_info[curr->id].u.list) != NULL
12153 && ((total += curr->output_offset - prev->output_offset)
12154 < (ppc64_elf_section_data (prev) != NULL
12155 && ppc64_elf_section_data (prev)->has_14bit_branch
12156 ? (group_size = stub_group_size >> 10) : group_size))
12157 && htab->sec_info[prev->id].toc_off == curr_toc)
12158 curr = prev;
12159
12160 /* OK, the size from the start of CURR to the end is less
12161 than group_size and thus can be handled by one stub
12162 section. (or the tail section is itself larger than
12163 group_size, in which case we may be toast.) We should
12164 really be keeping track of the total size of stubs added
12165 here, as stubs contribute to the final output section
12166 size. That's a little tricky, and this way will only
12167 break if stubs added make the total size more than 2^25,
12168 ie. for the default stub_group_size, if stubs total more
12169 than 2097152 bytes, or nearly 75000 plt call stubs. */
12170 group = bfd_alloc (curr->owner, sizeof (*group));
12171 if (group == NULL)
12172 return FALSE;
12173 group->link_sec = curr;
12174 group->stub_sec = NULL;
12175 group->needs_save_res = 0;
12176 group->tls_get_addr_opt_bctrl = -1u;
12177 group->next = htab->group;
12178 htab->group = group;
12179 do
12180 {
12181 prev = htab->sec_info[tail->id].u.list;
12182 /* Set up this stub group. */
12183 htab->sec_info[tail->id].u.group = group;
12184 }
12185 while (tail != curr && (tail = prev) != NULL);
12186
12187 /* But wait, there's more! Input sections up to group_size
12188 bytes before the stub section can be handled by it too.
12189 Don't do this if we have a really large section after the
12190 stubs, as adding more stubs increases the chance that
12191 branches may not reach into the stub section. */
12192 if (!stubs_always_before_branch && !big_sec)
12193 {
12194 total = 0;
12195 while (prev != NULL
12196 && ((total += tail->output_offset - prev->output_offset)
12197 < (ppc64_elf_section_data (prev) != NULL
12198 && ppc64_elf_section_data (prev)->has_14bit_branch
12199 ? (group_size = stub_group_size >> 10) : group_size))
12200 && htab->sec_info[prev->id].toc_off == curr_toc)
12201 {
12202 tail = prev;
12203 prev = htab->sec_info[tail->id].u.list;
12204 htab->sec_info[tail->id].u.group = group;
12205 }
12206 }
12207 tail = prev;
12208 }
12209 }
12210 return TRUE;
12211 }
12212
12213 static const unsigned char glink_eh_frame_cie[] =
12214 {
12215 0, 0, 0, 16, /* length. */
12216 0, 0, 0, 0, /* id. */
12217 1, /* CIE version. */
12218 'z', 'R', 0, /* Augmentation string. */
12219 4, /* Code alignment. */
12220 0x78, /* Data alignment. */
12221 65, /* RA reg. */
12222 1, /* Augmentation size. */
12223 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
12224 DW_CFA_def_cfa, 1, 0 /* def_cfa: r1 offset 0. */
12225 };
12226
12227 static size_t
12228 stub_eh_frame_size (struct map_stub *group, size_t align)
12229 {
12230 size_t this_size = 17;
12231 if (group->tls_get_addr_opt_bctrl != -1u)
12232 {
12233 unsigned int to_bctrl = group->tls_get_addr_opt_bctrl / 4;
12234 if (to_bctrl < 64)
12235 this_size += 1;
12236 else if (to_bctrl < 256)
12237 this_size += 2;
12238 else if (to_bctrl < 65536)
12239 this_size += 3;
12240 else
12241 this_size += 5;
12242 this_size += 6;
12243 }
12244 this_size = (this_size + align - 1) & -align;
12245 return this_size;
12246 }
12247
12248 /* Stripping output sections is normally done before dynamic section
12249 symbols have been allocated. This function is called later, and
12250 handles cases like htab->brlt which is mapped to its own output
12251 section. */
12252
12253 static void
12254 maybe_strip_output (struct bfd_link_info *info, asection *isec)
12255 {
12256 if (isec->size == 0
12257 && isec->output_section->size == 0
12258 && !(isec->output_section->flags & SEC_KEEP)
12259 && !bfd_section_removed_from_list (info->output_bfd,
12260 isec->output_section)
12261 && elf_section_data (isec->output_section)->dynindx == 0)
12262 {
12263 isec->output_section->flags |= SEC_EXCLUDE;
12264 bfd_section_list_remove (info->output_bfd, isec->output_section);
12265 info->output_bfd->section_count--;
12266 }
12267 }
12268
12269 /* Determine and set the size of the stub section for a final link.
12270
12271 The basic idea here is to examine all the relocations looking for
12272 PC-relative calls to a target that is unreachable with a "bl"
12273 instruction. */
12274
12275 bfd_boolean
12276 ppc64_elf_size_stubs (struct bfd_link_info *info)
12277 {
12278 bfd_size_type stub_group_size;
12279 bfd_boolean stubs_always_before_branch;
12280 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12281
12282 if (htab == NULL)
12283 return FALSE;
12284
12285 if (htab->params->plt_thread_safe == -1 && !bfd_link_executable (info))
12286 htab->params->plt_thread_safe = 1;
12287 if (!htab->opd_abi)
12288 htab->params->plt_thread_safe = 0;
12289 else if (htab->params->plt_thread_safe == -1)
12290 {
12291 static const char *const thread_starter[] =
12292 {
12293 "pthread_create",
12294 /* libstdc++ */
12295 "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE",
12296 /* librt */
12297 "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio",
12298 "mq_notify", "create_timer",
12299 /* libanl */
12300 "getaddrinfo_a",
12301 /* libgomp */
12302 "GOMP_parallel",
12303 "GOMP_parallel_start",
12304 "GOMP_parallel_loop_static",
12305 "GOMP_parallel_loop_static_start",
12306 "GOMP_parallel_loop_dynamic",
12307 "GOMP_parallel_loop_dynamic_start",
12308 "GOMP_parallel_loop_guided",
12309 "GOMP_parallel_loop_guided_start",
12310 "GOMP_parallel_loop_runtime",
12311 "GOMP_parallel_loop_runtime_start",
12312 "GOMP_parallel_sections",
12313 "GOMP_parallel_sections_start",
12314 /* libgo */
12315 "__go_go",
12316 };
12317 unsigned i;
12318
12319 for (i = 0; i < ARRAY_SIZE (thread_starter); i++)
12320 {
12321 struct elf_link_hash_entry *h;
12322 h = elf_link_hash_lookup (&htab->elf, thread_starter[i],
12323 FALSE, FALSE, TRUE);
12324 htab->params->plt_thread_safe = h != NULL && h->ref_regular;
12325 if (htab->params->plt_thread_safe)
12326 break;
12327 }
12328 }
12329 stubs_always_before_branch = htab->params->group_size < 0;
12330 if (htab->params->group_size < 0)
12331 stub_group_size = -htab->params->group_size;
12332 else
12333 stub_group_size = htab->params->group_size;
12334
12335 if (!group_sections (info, stub_group_size, stubs_always_before_branch))
12336 return FALSE;
12337
12338 #define STUB_SHRINK_ITER 20
12339 /* Loop until no stubs added. After iteration 20 of this loop we may
12340 exit on a stub section shrinking. This is to break out of a
12341 pathological case where adding stubs on one iteration decreases
12342 section gaps (perhaps due to alignment), which then requires
12343 fewer or smaller stubs on the next iteration. */
12344
12345 while (1)
12346 {
12347 bfd *input_bfd;
12348 unsigned int bfd_indx;
12349 struct map_stub *group;
12350
12351 htab->stub_iteration += 1;
12352
12353 for (input_bfd = info->input_bfds, bfd_indx = 0;
12354 input_bfd != NULL;
12355 input_bfd = input_bfd->link.next, bfd_indx++)
12356 {
12357 Elf_Internal_Shdr *symtab_hdr;
12358 asection *section;
12359 Elf_Internal_Sym *local_syms = NULL;
12360
12361 if (!is_ppc64_elf (input_bfd))
12362 continue;
12363
12364 /* We'll need the symbol table in a second. */
12365 symtab_hdr = &elf_symtab_hdr (input_bfd);
12366 if (symtab_hdr->sh_info == 0)
12367 continue;
12368
12369 /* Walk over each section attached to the input bfd. */
12370 for (section = input_bfd->sections;
12371 section != NULL;
12372 section = section->next)
12373 {
12374 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
12375
12376 /* If there aren't any relocs, then there's nothing more
12377 to do. */
12378 if ((section->flags & SEC_RELOC) == 0
12379 || (section->flags & SEC_ALLOC) == 0
12380 || (section->flags & SEC_LOAD) == 0
12381 || (section->flags & SEC_CODE) == 0
12382 || section->reloc_count == 0)
12383 continue;
12384
12385 /* If this section is a link-once section that will be
12386 discarded, then don't create any stubs. */
12387 if (section->output_section == NULL
12388 || section->output_section->owner != info->output_bfd)
12389 continue;
12390
12391 /* Get the relocs. */
12392 internal_relocs
12393 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
12394 info->keep_memory);
12395 if (internal_relocs == NULL)
12396 goto error_ret_free_local;
12397
12398 /* Now examine each relocation. */
12399 irela = internal_relocs;
12400 irelaend = irela + section->reloc_count;
12401 for (; irela < irelaend; irela++)
12402 {
12403 enum elf_ppc64_reloc_type r_type;
12404 unsigned int r_indx;
12405 enum ppc_stub_type stub_type;
12406 struct ppc_stub_hash_entry *stub_entry;
12407 asection *sym_sec, *code_sec;
12408 bfd_vma sym_value, code_value;
12409 bfd_vma destination;
12410 unsigned long local_off;
12411 bfd_boolean ok_dest;
12412 struct ppc_link_hash_entry *hash;
12413 struct ppc_link_hash_entry *fdh;
12414 struct elf_link_hash_entry *h;
12415 Elf_Internal_Sym *sym;
12416 char *stub_name;
12417 const asection *id_sec;
12418 struct _opd_sec_data *opd;
12419 struct plt_entry *plt_ent;
12420
12421 r_type = ELF64_R_TYPE (irela->r_info);
12422 r_indx = ELF64_R_SYM (irela->r_info);
12423
12424 if (r_type >= R_PPC64_max)
12425 {
12426 bfd_set_error (bfd_error_bad_value);
12427 goto error_ret_free_internal;
12428 }
12429
12430 /* Only look for stubs on branch instructions. */
12431 if (r_type != R_PPC64_REL24
12432 && r_type != R_PPC64_REL14
12433 && r_type != R_PPC64_REL14_BRTAKEN
12434 && r_type != R_PPC64_REL14_BRNTAKEN)
12435 continue;
12436
12437 /* Now determine the call target, its name, value,
12438 section. */
12439 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
12440 r_indx, input_bfd))
12441 goto error_ret_free_internal;
12442 hash = (struct ppc_link_hash_entry *) h;
12443
12444 ok_dest = FALSE;
12445 fdh = NULL;
12446 sym_value = 0;
12447 if (hash == NULL)
12448 {
12449 sym_value = sym->st_value;
12450 if (sym_sec != NULL
12451 && sym_sec->output_section != NULL)
12452 ok_dest = TRUE;
12453 }
12454 else if (hash->elf.root.type == bfd_link_hash_defined
12455 || hash->elf.root.type == bfd_link_hash_defweak)
12456 {
12457 sym_value = hash->elf.root.u.def.value;
12458 if (sym_sec->output_section != NULL)
12459 ok_dest = TRUE;
12460 }
12461 else if (hash->elf.root.type == bfd_link_hash_undefweak
12462 || hash->elf.root.type == bfd_link_hash_undefined)
12463 {
12464 /* Recognise an old ABI func code entry sym, and
12465 use the func descriptor sym instead if it is
12466 defined. */
12467 if (hash->elf.root.root.string[0] == '.'
12468 && hash->oh != NULL)
12469 {
12470 fdh = ppc_follow_link (hash->oh);
12471 if (fdh->elf.root.type == bfd_link_hash_defined
12472 || fdh->elf.root.type == bfd_link_hash_defweak)
12473 {
12474 sym_sec = fdh->elf.root.u.def.section;
12475 sym_value = fdh->elf.root.u.def.value;
12476 if (sym_sec->output_section != NULL)
12477 ok_dest = TRUE;
12478 }
12479 else
12480 fdh = NULL;
12481 }
12482 }
12483 else
12484 {
12485 bfd_set_error (bfd_error_bad_value);
12486 goto error_ret_free_internal;
12487 }
12488
12489 destination = 0;
12490 local_off = 0;
12491 if (ok_dest)
12492 {
12493 sym_value += irela->r_addend;
12494 destination = (sym_value
12495 + sym_sec->output_offset
12496 + sym_sec->output_section->vma);
12497 local_off = PPC64_LOCAL_ENTRY_OFFSET (hash
12498 ? hash->elf.other
12499 : sym->st_other);
12500 }
12501
12502 code_sec = sym_sec;
12503 code_value = sym_value;
12504 opd = get_opd_info (sym_sec);
12505 if (opd != NULL)
12506 {
12507 bfd_vma dest;
12508
12509 if (hash == NULL && opd->adjust != NULL)
12510 {
12511 long adjust = opd->adjust[OPD_NDX (sym_value)];
12512 if (adjust == -1)
12513 continue;
12514 code_value += adjust;
12515 sym_value += adjust;
12516 }
12517 dest = opd_entry_value (sym_sec, sym_value,
12518 &code_sec, &code_value, FALSE);
12519 if (dest != (bfd_vma) -1)
12520 {
12521 destination = dest;
12522 if (fdh != NULL)
12523 {
12524 /* Fixup old ABI sym to point at code
12525 entry. */
12526 hash->elf.root.type = bfd_link_hash_defweak;
12527 hash->elf.root.u.def.section = code_sec;
12528 hash->elf.root.u.def.value = code_value;
12529 }
12530 }
12531 }
12532
12533 /* Determine what (if any) linker stub is needed. */
12534 plt_ent = NULL;
12535 stub_type = ppc_type_of_stub (section, irela, &hash,
12536 &plt_ent, destination,
12537 local_off);
12538
12539 if (stub_type != ppc_stub_plt_call)
12540 {
12541 /* Check whether we need a TOC adjusting stub.
12542 Since the linker pastes together pieces from
12543 different object files when creating the
12544 _init and _fini functions, it may be that a
12545 call to what looks like a local sym is in
12546 fact a call needing a TOC adjustment. */
12547 if (code_sec != NULL
12548 && code_sec->output_section != NULL
12549 && (htab->sec_info[code_sec->id].toc_off
12550 != htab->sec_info[section->id].toc_off)
12551 && (code_sec->has_toc_reloc
12552 || code_sec->makes_toc_func_call))
12553 stub_type = ppc_stub_long_branch_r2off;
12554 }
12555
12556 if (stub_type == ppc_stub_none)
12557 continue;
12558
12559 /* __tls_get_addr calls might be eliminated. */
12560 if (stub_type != ppc_stub_plt_call
12561 && hash != NULL
12562 && (hash == htab->tls_get_addr
12563 || hash == htab->tls_get_addr_fd)
12564 && section->has_tls_reloc
12565 && irela != internal_relocs)
12566 {
12567 /* Get tls info. */
12568 unsigned char *tls_mask;
12569
12570 if (!get_tls_mask (&tls_mask, NULL, NULL, &local_syms,
12571 irela - 1, input_bfd))
12572 goto error_ret_free_internal;
12573 if (*tls_mask != 0)
12574 continue;
12575 }
12576
12577 if (stub_type == ppc_stub_plt_call)
12578 {
12579 if (!htab->opd_abi
12580 && htab->params->plt_localentry0 != 0
12581 && is_elfv2_localentry0 (&hash->elf))
12582 htab->has_plt_localentry0 = 1;
12583 else if (irela + 1 < irelaend
12584 && irela[1].r_offset == irela->r_offset + 4
12585 && (ELF64_R_TYPE (irela[1].r_info)
12586 == R_PPC64_TOCSAVE))
12587 {
12588 if (!tocsave_find (htab, INSERT,
12589 &local_syms, irela + 1, input_bfd))
12590 goto error_ret_free_internal;
12591 }
12592 else
12593 stub_type = ppc_stub_plt_call_r2save;
12594 }
12595
12596 /* Support for grouping stub sections. */
12597 id_sec = htab->sec_info[section->id].u.group->link_sec;
12598
12599 /* Get the name of this stub. */
12600 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
12601 if (!stub_name)
12602 goto error_ret_free_internal;
12603
12604 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
12605 stub_name, FALSE, FALSE);
12606 if (stub_entry != NULL)
12607 {
12608 /* The proper stub has already been created. */
12609 free (stub_name);
12610 if (stub_type == ppc_stub_plt_call_r2save)
12611 stub_entry->stub_type = stub_type;
12612 continue;
12613 }
12614
12615 stub_entry = ppc_add_stub (stub_name, section, info);
12616 if (stub_entry == NULL)
12617 {
12618 free (stub_name);
12619 error_ret_free_internal:
12620 if (elf_section_data (section)->relocs == NULL)
12621 free (internal_relocs);
12622 error_ret_free_local:
12623 if (local_syms != NULL
12624 && (symtab_hdr->contents
12625 != (unsigned char *) local_syms))
12626 free (local_syms);
12627 return FALSE;
12628 }
12629
12630 stub_entry->stub_type = stub_type;
12631 if (stub_type != ppc_stub_plt_call
12632 && stub_type != ppc_stub_plt_call_r2save)
12633 {
12634 stub_entry->target_value = code_value;
12635 stub_entry->target_section = code_sec;
12636 }
12637 else
12638 {
12639 stub_entry->target_value = sym_value;
12640 stub_entry->target_section = sym_sec;
12641 }
12642 stub_entry->h = hash;
12643 stub_entry->plt_ent = plt_ent;
12644 stub_entry->other = hash ? hash->elf.other : sym->st_other;
12645
12646 if (stub_entry->h != NULL)
12647 htab->stub_globals += 1;
12648 }
12649
12650 /* We're done with the internal relocs, free them. */
12651 if (elf_section_data (section)->relocs != internal_relocs)
12652 free (internal_relocs);
12653 }
12654
12655 if (local_syms != NULL
12656 && symtab_hdr->contents != (unsigned char *) local_syms)
12657 {
12658 if (!info->keep_memory)
12659 free (local_syms);
12660 else
12661 symtab_hdr->contents = (unsigned char *) local_syms;
12662 }
12663 }
12664
12665 /* We may have added some stubs. Find out the new size of the
12666 stub sections. */
12667 for (group = htab->group; group != NULL; group = group->next)
12668 if (group->stub_sec != NULL)
12669 {
12670 asection *stub_sec = group->stub_sec;
12671
12672 if (htab->stub_iteration <= STUB_SHRINK_ITER
12673 || stub_sec->rawsize < stub_sec->size)
12674 /* Past STUB_SHRINK_ITER, rawsize is the max size seen. */
12675 stub_sec->rawsize = stub_sec->size;
12676 stub_sec->size = 0;
12677 stub_sec->reloc_count = 0;
12678 stub_sec->flags &= ~SEC_RELOC;
12679 }
12680
12681 htab->brlt->size = 0;
12682 htab->brlt->reloc_count = 0;
12683 htab->brlt->flags &= ~SEC_RELOC;
12684 if (htab->relbrlt != NULL)
12685 htab->relbrlt->size = 0;
12686
12687 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
12688
12689 for (group = htab->group; group != NULL; group = group->next)
12690 if (group->needs_save_res)
12691 group->stub_sec->size += htab->sfpr->size;
12692
12693 if (info->emitrelocations
12694 && htab->glink != NULL && htab->glink->size != 0)
12695 {
12696 htab->glink->reloc_count = 1;
12697 htab->glink->flags |= SEC_RELOC;
12698 }
12699
12700 if (htab->glink_eh_frame != NULL
12701 && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
12702 && htab->glink_eh_frame->output_section->size != 0)
12703 {
12704 size_t size = 0, align = 4;
12705
12706 for (group = htab->group; group != NULL; group = group->next)
12707 if (group->stub_sec != NULL)
12708 size += stub_eh_frame_size (group, align);
12709 if (htab->glink != NULL && htab->glink->size != 0)
12710 size += (24 + align - 1) & -align;
12711 if (size != 0)
12712 size += (sizeof (glink_eh_frame_cie) + align - 1) & -align;
12713 align = 1ul << htab->glink_eh_frame->output_section->alignment_power;
12714 size = (size + align - 1) & -align;
12715 htab->glink_eh_frame->rawsize = htab->glink_eh_frame->size;
12716 htab->glink_eh_frame->size = size;
12717 }
12718
12719 if (htab->params->plt_stub_align != 0)
12720 for (group = htab->group; group != NULL; group = group->next)
12721 if (group->stub_sec != NULL)
12722 group->stub_sec->size = ((group->stub_sec->size
12723 + (1 << htab->params->plt_stub_align) - 1)
12724 & -(1 << htab->params->plt_stub_align));
12725
12726 for (group = htab->group; group != NULL; group = group->next)
12727 if (group->stub_sec != NULL
12728 && group->stub_sec->rawsize != group->stub_sec->size
12729 && (htab->stub_iteration <= STUB_SHRINK_ITER
12730 || group->stub_sec->rawsize < group->stub_sec->size))
12731 break;
12732
12733 if (group == NULL
12734 && (htab->glink_eh_frame == NULL
12735 || htab->glink_eh_frame->rawsize == htab->glink_eh_frame->size))
12736 break;
12737
12738 /* Ask the linker to do its stuff. */
12739 (*htab->params->layout_sections_again) ();
12740 }
12741
12742 if (htab->glink_eh_frame != NULL
12743 && htab->glink_eh_frame->size != 0)
12744 {
12745 bfd_vma val;
12746 bfd_byte *p, *last_fde;
12747 size_t last_fde_len, size, align, pad;
12748 struct map_stub *group;
12749
12750 p = bfd_zalloc (htab->glink_eh_frame->owner, htab->glink_eh_frame->size);
12751 if (p == NULL)
12752 return FALSE;
12753 htab->glink_eh_frame->contents = p;
12754 last_fde = p;
12755 align = 4;
12756
12757 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
12758 /* CIE length (rewrite in case little-endian). */
12759 last_fde_len = ((sizeof (glink_eh_frame_cie) + align - 1) & -align) - 4;
12760 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
12761 p += last_fde_len + 4;
12762
12763 for (group = htab->group; group != NULL; group = group->next)
12764 if (group->stub_sec != NULL)
12765 {
12766 last_fde = p;
12767 last_fde_len = stub_eh_frame_size (group, align) - 4;
12768 /* FDE length. */
12769 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
12770 p += 4;
12771 /* CIE pointer. */
12772 val = p - htab->glink_eh_frame->contents;
12773 bfd_put_32 (htab->elf.dynobj, val, p);
12774 p += 4;
12775 /* Offset to stub section, written later. */
12776 p += 4;
12777 /* stub section size. */
12778 bfd_put_32 (htab->elf.dynobj, group->stub_sec->size, p);
12779 p += 4;
12780 /* Augmentation. */
12781 p += 1;
12782 if (group->tls_get_addr_opt_bctrl != -1u)
12783 {
12784 unsigned int to_bctrl = group->tls_get_addr_opt_bctrl / 4;
12785
12786 /* This FDE needs more than just the default.
12787 Describe __tls_get_addr_opt stub LR. */
12788 if (to_bctrl < 64)
12789 *p++ = DW_CFA_advance_loc + to_bctrl;
12790 else if (to_bctrl < 256)
12791 {
12792 *p++ = DW_CFA_advance_loc1;
12793 *p++ = to_bctrl;
12794 }
12795 else if (to_bctrl < 65536)
12796 {
12797 *p++ = DW_CFA_advance_loc2;
12798 bfd_put_16 (htab->elf.dynobj, to_bctrl, p);
12799 p += 2;
12800 }
12801 else
12802 {
12803 *p++ = DW_CFA_advance_loc4;
12804 bfd_put_32 (htab->elf.dynobj, to_bctrl, p);
12805 p += 4;
12806 }
12807 *p++ = DW_CFA_offset_extended_sf;
12808 *p++ = 65;
12809 *p++ = -(STK_LINKER (htab) / 8) & 0x7f;
12810 *p++ = DW_CFA_advance_loc + 4;
12811 *p++ = DW_CFA_restore_extended;
12812 *p++ = 65;
12813 }
12814 /* Pad. */
12815 p = last_fde + last_fde_len + 4;
12816 }
12817 if (htab->glink != NULL && htab->glink->size != 0)
12818 {
12819 last_fde = p;
12820 last_fde_len = ((24 + align - 1) & -align) - 4;
12821 /* FDE length. */
12822 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
12823 p += 4;
12824 /* CIE pointer. */
12825 val = p - htab->glink_eh_frame->contents;
12826 bfd_put_32 (htab->elf.dynobj, val, p);
12827 p += 4;
12828 /* Offset to .glink, written later. */
12829 p += 4;
12830 /* .glink size. */
12831 bfd_put_32 (htab->elf.dynobj, htab->glink->size - 8, p);
12832 p += 4;
12833 /* Augmentation. */
12834 p += 1;
12835
12836 *p++ = DW_CFA_advance_loc + 1;
12837 *p++ = DW_CFA_register;
12838 *p++ = 65;
12839 *p++ = htab->opd_abi ? 12 : 0;
12840 *p++ = DW_CFA_advance_loc + (htab->opd_abi ? 5 : 7);
12841 *p++ = DW_CFA_restore_extended;
12842 *p++ = 65;
12843 p += ((24 + align - 1) & -align) - 24;
12844 }
12845 /* Subsume any padding into the last FDE if user .eh_frame
12846 sections are aligned more than glink_eh_frame. Otherwise any
12847 zero padding will be seen as a terminator. */
12848 align = 1ul << htab->glink_eh_frame->output_section->alignment_power;
12849 size = p - htab->glink_eh_frame->contents;
12850 pad = ((size + align - 1) & -align) - size;
12851 htab->glink_eh_frame->size = size + pad;
12852 bfd_put_32 (htab->elf.dynobj, last_fde_len + pad, last_fde);
12853 }
12854
12855 maybe_strip_output (info, htab->brlt);
12856 if (htab->glink_eh_frame != NULL)
12857 maybe_strip_output (info, htab->glink_eh_frame);
12858
12859 return TRUE;
12860 }
12861
12862 /* Called after we have determined section placement. If sections
12863 move, we'll be called again. Provide a value for TOCstart. */
12864
12865 bfd_vma
12866 ppc64_elf_set_toc (struct bfd_link_info *info, bfd *obfd)
12867 {
12868 asection *s;
12869 bfd_vma TOCstart, adjust;
12870
12871 if (info != NULL)
12872 {
12873 struct elf_link_hash_entry *h;
12874 struct elf_link_hash_table *htab = elf_hash_table (info);
12875
12876 if (is_elf_hash_table (htab)
12877 && htab->hgot != NULL)
12878 h = htab->hgot;
12879 else
12880 {
12881 h = elf_link_hash_lookup (htab, ".TOC.", FALSE, FALSE, TRUE);
12882 if (is_elf_hash_table (htab))
12883 htab->hgot = h;
12884 }
12885 if (h != NULL
12886 && h->root.type == bfd_link_hash_defined
12887 && !h->root.linker_def
12888 && (!is_elf_hash_table (htab)
12889 || h->def_regular))
12890 {
12891 TOCstart = (h->root.u.def.value - TOC_BASE_OFF
12892 + h->root.u.def.section->output_offset
12893 + h->root.u.def.section->output_section->vma);
12894 _bfd_set_gp_value (obfd, TOCstart);
12895 return TOCstart;
12896 }
12897 }
12898
12899 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
12900 order. The TOC starts where the first of these sections starts. */
12901 s = bfd_get_section_by_name (obfd, ".got");
12902 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12903 s = bfd_get_section_by_name (obfd, ".toc");
12904 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12905 s = bfd_get_section_by_name (obfd, ".tocbss");
12906 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12907 s = bfd_get_section_by_name (obfd, ".plt");
12908 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12909 {
12910 /* This may happen for
12911 o references to TOC base (SYM@toc / TOC[tc0]) without a
12912 .toc directive
12913 o bad linker script
12914 o --gc-sections and empty TOC sections
12915
12916 FIXME: Warn user? */
12917
12918 /* Look for a likely section. We probably won't even be
12919 using TOCstart. */
12920 for (s = obfd->sections; s != NULL; s = s->next)
12921 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY
12922 | SEC_EXCLUDE))
12923 == (SEC_ALLOC | SEC_SMALL_DATA))
12924 break;
12925 if (s == NULL)
12926 for (s = obfd->sections; s != NULL; s = s->next)
12927 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_EXCLUDE))
12928 == (SEC_ALLOC | SEC_SMALL_DATA))
12929 break;
12930 if (s == NULL)
12931 for (s = obfd->sections; s != NULL; s = s->next)
12932 if ((s->flags & (SEC_ALLOC | SEC_READONLY | SEC_EXCLUDE))
12933 == SEC_ALLOC)
12934 break;
12935 if (s == NULL)
12936 for (s = obfd->sections; s != NULL; s = s->next)
12937 if ((s->flags & (SEC_ALLOC | SEC_EXCLUDE)) == SEC_ALLOC)
12938 break;
12939 }
12940
12941 TOCstart = 0;
12942 if (s != NULL)
12943 TOCstart = s->output_section->vma + s->output_offset;
12944
12945 /* Force alignment. */
12946 adjust = TOCstart & (TOC_BASE_ALIGN - 1);
12947 TOCstart -= adjust;
12948 _bfd_set_gp_value (obfd, TOCstart);
12949
12950 if (info != NULL && s != NULL)
12951 {
12952 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12953
12954 if (htab != NULL)
12955 {
12956 if (htab->elf.hgot != NULL)
12957 {
12958 htab->elf.hgot->root.u.def.value = TOC_BASE_OFF - adjust;
12959 htab->elf.hgot->root.u.def.section = s;
12960 }
12961 }
12962 else
12963 {
12964 struct bfd_link_hash_entry *bh = NULL;
12965 _bfd_generic_link_add_one_symbol (info, obfd, ".TOC.", BSF_GLOBAL,
12966 s, TOC_BASE_OFF - adjust,
12967 NULL, FALSE, FALSE, &bh);
12968 }
12969 }
12970 return TOCstart;
12971 }
12972
12973 /* Called via elf_link_hash_traverse from ppc64_elf_build_stubs to
12974 write out any global entry stubs. */
12975
12976 static bfd_boolean
12977 build_global_entry_stubs (struct elf_link_hash_entry *h, void *inf)
12978 {
12979 struct bfd_link_info *info;
12980 struct ppc_link_hash_table *htab;
12981 struct plt_entry *pent;
12982 asection *s;
12983
12984 if (h->root.type == bfd_link_hash_indirect)
12985 return TRUE;
12986
12987 if (!h->pointer_equality_needed)
12988 return TRUE;
12989
12990 if (h->def_regular)
12991 return TRUE;
12992
12993 info = inf;
12994 htab = ppc_hash_table (info);
12995 if (htab == NULL)
12996 return FALSE;
12997
12998 s = htab->glink;
12999 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
13000 if (pent->plt.offset != (bfd_vma) -1
13001 && pent->addend == 0)
13002 {
13003 bfd_byte *p;
13004 asection *plt;
13005 bfd_vma off;
13006
13007 p = s->contents + h->root.u.def.value;
13008 plt = htab->elf.splt;
13009 if (!htab->elf.dynamic_sections_created
13010 || h->dynindx == -1)
13011 plt = htab->elf.iplt;
13012 off = pent->plt.offset + plt->output_offset + plt->output_section->vma;
13013 off -= h->root.u.def.value + s->output_offset + s->output_section->vma;
13014
13015 if (off + 0x80008000 > 0xffffffff || (off & 3) != 0)
13016 {
13017 info->callbacks->einfo
13018 (_("%P: linkage table error against `%T'\n"),
13019 h->root.root.string);
13020 bfd_set_error (bfd_error_bad_value);
13021 htab->stub_error = TRUE;
13022 }
13023
13024 htab->stub_count[ppc_stub_global_entry - 1] += 1;
13025 if (htab->params->emit_stub_syms)
13026 {
13027 size_t len = strlen (h->root.root.string);
13028 char *name = bfd_malloc (sizeof "12345678.global_entry." + len);
13029
13030 if (name == NULL)
13031 return FALSE;
13032
13033 sprintf (name, "%08x.global_entry.%s", s->id, h->root.root.string);
13034 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
13035 if (h == NULL)
13036 return FALSE;
13037 if (h->root.type == bfd_link_hash_new)
13038 {
13039 h->root.type = bfd_link_hash_defined;
13040 h->root.u.def.section = s;
13041 h->root.u.def.value = p - s->contents;
13042 h->ref_regular = 1;
13043 h->def_regular = 1;
13044 h->ref_regular_nonweak = 1;
13045 h->forced_local = 1;
13046 h->non_elf = 0;
13047 h->root.linker_def = 1;
13048 }
13049 }
13050
13051 if (PPC_HA (off) != 0)
13052 {
13053 bfd_put_32 (s->owner, ADDIS_R12_R12 | PPC_HA (off), p);
13054 p += 4;
13055 }
13056 bfd_put_32 (s->owner, LD_R12_0R12 | PPC_LO (off), p);
13057 p += 4;
13058 bfd_put_32 (s->owner, MTCTR_R12, p);
13059 p += 4;
13060 bfd_put_32 (s->owner, BCTR, p);
13061 break;
13062 }
13063 return TRUE;
13064 }
13065
13066 /* Build all the stubs associated with the current output file.
13067 The stubs are kept in a hash table attached to the main linker
13068 hash table. This function is called via gldelf64ppc_finish. */
13069
13070 bfd_boolean
13071 ppc64_elf_build_stubs (struct bfd_link_info *info,
13072 char **stats)
13073 {
13074 struct ppc_link_hash_table *htab = ppc_hash_table (info);
13075 struct map_stub *group;
13076 asection *stub_sec;
13077 bfd_byte *p;
13078 int stub_sec_count = 0;
13079
13080 if (htab == NULL)
13081 return FALSE;
13082
13083 /* Allocate memory to hold the linker stubs. */
13084 for (group = htab->group; group != NULL; group = group->next)
13085 if ((stub_sec = group->stub_sec) != NULL
13086 && stub_sec->size != 0)
13087 {
13088 stub_sec->contents = bfd_zalloc (htab->params->stub_bfd, stub_sec->size);
13089 if (stub_sec->contents == NULL)
13090 return FALSE;
13091 stub_sec->size = 0;
13092 }
13093
13094 if (htab->glink != NULL && htab->glink->size != 0)
13095 {
13096 unsigned int indx;
13097 bfd_vma plt0;
13098
13099 /* Build the .glink plt call stub. */
13100 if (htab->params->emit_stub_syms)
13101 {
13102 struct elf_link_hash_entry *h;
13103 h = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
13104 TRUE, FALSE, FALSE);
13105 if (h == NULL)
13106 return FALSE;
13107 if (h->root.type == bfd_link_hash_new)
13108 {
13109 h->root.type = bfd_link_hash_defined;
13110 h->root.u.def.section = htab->glink;
13111 h->root.u.def.value = 8;
13112 h->ref_regular = 1;
13113 h->def_regular = 1;
13114 h->ref_regular_nonweak = 1;
13115 h->forced_local = 1;
13116 h->non_elf = 0;
13117 h->root.linker_def = 1;
13118 }
13119 }
13120 plt0 = (htab->elf.splt->output_section->vma
13121 + htab->elf.splt->output_offset
13122 - 16);
13123 if (info->emitrelocations)
13124 {
13125 Elf_Internal_Rela *r = get_relocs (htab->glink, 1);
13126 if (r == NULL)
13127 return FALSE;
13128 r->r_offset = (htab->glink->output_offset
13129 + htab->glink->output_section->vma);
13130 r->r_info = ELF64_R_INFO (0, R_PPC64_REL64);
13131 r->r_addend = plt0;
13132 }
13133 p = htab->glink->contents;
13134 plt0 -= htab->glink->output_section->vma + htab->glink->output_offset;
13135 bfd_put_64 (htab->glink->owner, plt0, p);
13136 p += 8;
13137 if (htab->opd_abi)
13138 {
13139 bfd_put_32 (htab->glink->owner, MFLR_R12, p);
13140 p += 4;
13141 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
13142 p += 4;
13143 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
13144 p += 4;
13145 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | (-16 & 0xfffc), p);
13146 p += 4;
13147 bfd_put_32 (htab->glink->owner, MTLR_R12, p);
13148 p += 4;
13149 bfd_put_32 (htab->glink->owner, ADD_R11_R2_R11, p);
13150 p += 4;
13151 bfd_put_32 (htab->glink->owner, LD_R12_0R11, p);
13152 p += 4;
13153 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | 8, p);
13154 p += 4;
13155 bfd_put_32 (htab->glink->owner, MTCTR_R12, p);
13156 p += 4;
13157 bfd_put_32 (htab->glink->owner, LD_R11_0R11 | 16, p);
13158 p += 4;
13159 }
13160 else
13161 {
13162 bfd_put_32 (htab->glink->owner, MFLR_R0, p);
13163 p += 4;
13164 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
13165 p += 4;
13166 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
13167 p += 4;
13168 bfd_put_32 (htab->glink->owner, STD_R2_0R1 + 24, p);
13169 p += 4;
13170 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | (-16 & 0xfffc), p);
13171 p += 4;
13172 bfd_put_32 (htab->glink->owner, MTLR_R0, p);
13173 p += 4;
13174 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
13175 p += 4;
13176 bfd_put_32 (htab->glink->owner, ADD_R11_R2_R11, p);
13177 p += 4;
13178 bfd_put_32 (htab->glink->owner, ADDI_R0_R12 | (-48 & 0xffff), p);
13179 p += 4;
13180 bfd_put_32 (htab->glink->owner, LD_R12_0R11, p);
13181 p += 4;
13182 bfd_put_32 (htab->glink->owner, SRDI_R0_R0_2, p);
13183 p += 4;
13184 bfd_put_32 (htab->glink->owner, MTCTR_R12, p);
13185 p += 4;
13186 bfd_put_32 (htab->glink->owner, LD_R11_0R11 | 8, p);
13187 p += 4;
13188 }
13189 bfd_put_32 (htab->glink->owner, BCTR, p);
13190 p += 4;
13191 while (p - htab->glink->contents < GLINK_CALL_STUB_SIZE)
13192 {
13193 bfd_put_32 (htab->glink->owner, NOP, p);
13194 p += 4;
13195 }
13196
13197 /* Build the .glink lazy link call stubs. */
13198 indx = 0;
13199 while (p < htab->glink->contents + htab->glink->rawsize)
13200 {
13201 if (htab->opd_abi)
13202 {
13203 if (indx < 0x8000)
13204 {
13205 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
13206 p += 4;
13207 }
13208 else
13209 {
13210 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
13211 p += 4;
13212 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx),
13213 p);
13214 p += 4;
13215 }
13216 }
13217 bfd_put_32 (htab->glink->owner,
13218 B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p);
13219 indx++;
13220 p += 4;
13221 }
13222
13223 /* Build .glink global entry stubs. */
13224 if (htab->glink->size > htab->glink->rawsize)
13225 elf_link_hash_traverse (&htab->elf, build_global_entry_stubs, info);
13226 }
13227
13228 if (htab->brlt != NULL && htab->brlt->size != 0)
13229 {
13230 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
13231 htab->brlt->size);
13232 if (htab->brlt->contents == NULL)
13233 return FALSE;
13234 }
13235 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
13236 {
13237 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
13238 htab->relbrlt->size);
13239 if (htab->relbrlt->contents == NULL)
13240 return FALSE;
13241 }
13242
13243 /* Build the stubs as directed by the stub hash table. */
13244 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
13245
13246 for (group = htab->group; group != NULL; group = group->next)
13247 if (group->needs_save_res)
13248 {
13249 stub_sec = group->stub_sec;
13250 memcpy (stub_sec->contents + stub_sec->size, htab->sfpr->contents,
13251 htab->sfpr->size);
13252 if (htab->params->emit_stub_syms)
13253 {
13254 unsigned int i;
13255
13256 for (i = 0; i < ARRAY_SIZE (save_res_funcs); i++)
13257 if (!sfpr_define (info, &save_res_funcs[i], stub_sec))
13258 return FALSE;
13259 }
13260 stub_sec->size += htab->sfpr->size;
13261 }
13262
13263 if (htab->relbrlt != NULL)
13264 htab->relbrlt->reloc_count = 0;
13265
13266 if (htab->params->plt_stub_align != 0)
13267 for (group = htab->group; group != NULL; group = group->next)
13268 if ((stub_sec = group->stub_sec) != NULL)
13269 stub_sec->size = ((stub_sec->size
13270 + (1 << htab->params->plt_stub_align) - 1)
13271 & -(1 << htab->params->plt_stub_align));
13272
13273 for (group = htab->group; group != NULL; group = group->next)
13274 if ((stub_sec = group->stub_sec) != NULL)
13275 {
13276 stub_sec_count += 1;
13277 if (stub_sec->rawsize != stub_sec->size
13278 && (htab->stub_iteration <= STUB_SHRINK_ITER
13279 || stub_sec->rawsize < stub_sec->size))
13280 break;
13281 }
13282
13283 if (group != NULL)
13284 {
13285 htab->stub_error = TRUE;
13286 info->callbacks->einfo (_("%P: stubs don't match calculated size\n"));
13287 }
13288
13289 if (htab->stub_error)
13290 return FALSE;
13291
13292 if (stats != NULL)
13293 {
13294 *stats = bfd_malloc (500);
13295 if (*stats == NULL)
13296 return FALSE;
13297
13298 sprintf (*stats, _("linker stubs in %u group%s\n"
13299 " branch %lu\n"
13300 " toc adjust %lu\n"
13301 " long branch %lu\n"
13302 " long toc adj %lu\n"
13303 " plt call %lu\n"
13304 " plt call toc %lu\n"
13305 " global entry %lu"),
13306 stub_sec_count,
13307 stub_sec_count == 1 ? "" : "s",
13308 htab->stub_count[ppc_stub_long_branch - 1],
13309 htab->stub_count[ppc_stub_long_branch_r2off - 1],
13310 htab->stub_count[ppc_stub_plt_branch - 1],
13311 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
13312 htab->stub_count[ppc_stub_plt_call - 1],
13313 htab->stub_count[ppc_stub_plt_call_r2save - 1],
13314 htab->stub_count[ppc_stub_global_entry - 1]);
13315 }
13316 return TRUE;
13317 }
13318
13319 /* What to do when ld finds relocations against symbols defined in
13320 discarded sections. */
13321
13322 static unsigned int
13323 ppc64_elf_action_discarded (asection *sec)
13324 {
13325 if (strcmp (".opd", sec->name) == 0)
13326 return 0;
13327
13328 if (strcmp (".toc", sec->name) == 0)
13329 return 0;
13330
13331 if (strcmp (".toc1", sec->name) == 0)
13332 return 0;
13333
13334 return _bfd_elf_default_action_discarded (sec);
13335 }
13336
13337 /* The RELOCATE_SECTION function is called by the ELF backend linker
13338 to handle the relocations for a section.
13339
13340 The relocs are always passed as Rela structures; if the section
13341 actually uses Rel structures, the r_addend field will always be
13342 zero.
13343
13344 This function is responsible for adjust the section contents as
13345 necessary, and (if using Rela relocs and generating a
13346 relocatable output file) adjusting the reloc addend as
13347 necessary.
13348
13349 This function does not have to worry about setting the reloc
13350 address or the reloc symbol index.
13351
13352 LOCAL_SYMS is a pointer to the swapped in local symbols.
13353
13354 LOCAL_SECTIONS is an array giving the section in the input file
13355 corresponding to the st_shndx field of each local symbol.
13356
13357 The global hash table entry for the global symbols can be found
13358 via elf_sym_hashes (input_bfd).
13359
13360 When generating relocatable output, this function must handle
13361 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
13362 going to be the section symbol corresponding to the output
13363 section, which means that the addend must be adjusted
13364 accordingly. */
13365
13366 static bfd_boolean
13367 ppc64_elf_relocate_section (bfd *output_bfd,
13368 struct bfd_link_info *info,
13369 bfd *input_bfd,
13370 asection *input_section,
13371 bfd_byte *contents,
13372 Elf_Internal_Rela *relocs,
13373 Elf_Internal_Sym *local_syms,
13374 asection **local_sections)
13375 {
13376 struct ppc_link_hash_table *htab;
13377 Elf_Internal_Shdr *symtab_hdr;
13378 struct elf_link_hash_entry **sym_hashes;
13379 Elf_Internal_Rela *rel;
13380 Elf_Internal_Rela *wrel;
13381 Elf_Internal_Rela *relend;
13382 Elf_Internal_Rela outrel;
13383 bfd_byte *loc;
13384 struct got_entry **local_got_ents;
13385 bfd_vma TOCstart;
13386 bfd_boolean ret = TRUE;
13387 bfd_boolean is_opd;
13388 /* Assume 'at' branch hints. */
13389 bfd_boolean is_isa_v2 = TRUE;
13390 bfd_vma d_offset = (bfd_big_endian (input_bfd) ? 2 : 0);
13391
13392 /* Initialize howto table if needed. */
13393 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
13394 ppc_howto_init ();
13395
13396 htab = ppc_hash_table (info);
13397 if (htab == NULL)
13398 return FALSE;
13399
13400 /* Don't relocate stub sections. */
13401 if (input_section->owner == htab->params->stub_bfd)
13402 return TRUE;
13403
13404 BFD_ASSERT (is_ppc64_elf (input_bfd));
13405
13406 local_got_ents = elf_local_got_ents (input_bfd);
13407 TOCstart = elf_gp (output_bfd);
13408 symtab_hdr = &elf_symtab_hdr (input_bfd);
13409 sym_hashes = elf_sym_hashes (input_bfd);
13410 is_opd = ppc64_elf_section_data (input_section)->sec_type == sec_opd;
13411
13412 rel = wrel = relocs;
13413 relend = relocs + input_section->reloc_count;
13414 for (; rel < relend; wrel++, rel++)
13415 {
13416 enum elf_ppc64_reloc_type r_type;
13417 bfd_vma addend;
13418 bfd_reloc_status_type r;
13419 Elf_Internal_Sym *sym;
13420 asection *sec;
13421 struct elf_link_hash_entry *h_elf;
13422 struct ppc_link_hash_entry *h;
13423 struct ppc_link_hash_entry *fdh;
13424 const char *sym_name;
13425 unsigned long r_symndx, toc_symndx;
13426 bfd_vma toc_addend;
13427 unsigned char tls_mask, tls_gd, tls_type;
13428 unsigned char sym_type;
13429 bfd_vma relocation;
13430 bfd_boolean unresolved_reloc;
13431 bfd_boolean warned;
13432 enum { DEST_NORMAL, DEST_OPD, DEST_STUB } reloc_dest;
13433 unsigned int insn;
13434 unsigned int mask;
13435 struct ppc_stub_hash_entry *stub_entry;
13436 bfd_vma max_br_offset;
13437 bfd_vma from;
13438 Elf_Internal_Rela orig_rel;
13439 reloc_howto_type *howto;
13440 struct reloc_howto_struct alt_howto;
13441
13442 again:
13443 orig_rel = *rel;
13444
13445 r_type = ELF64_R_TYPE (rel->r_info);
13446 r_symndx = ELF64_R_SYM (rel->r_info);
13447
13448 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
13449 symbol of the previous ADDR64 reloc. The symbol gives us the
13450 proper TOC base to use. */
13451 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
13452 && wrel != relocs
13453 && ELF64_R_TYPE (wrel[-1].r_info) == R_PPC64_ADDR64
13454 && is_opd)
13455 r_symndx = ELF64_R_SYM (wrel[-1].r_info);
13456
13457 sym = NULL;
13458 sec = NULL;
13459 h_elf = NULL;
13460 sym_name = NULL;
13461 unresolved_reloc = FALSE;
13462 warned = FALSE;
13463
13464 if (r_symndx < symtab_hdr->sh_info)
13465 {
13466 /* It's a local symbol. */
13467 struct _opd_sec_data *opd;
13468
13469 sym = local_syms + r_symndx;
13470 sec = local_sections[r_symndx];
13471 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
13472 sym_type = ELF64_ST_TYPE (sym->st_info);
13473 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
13474 opd = get_opd_info (sec);
13475 if (opd != NULL && opd->adjust != NULL)
13476 {
13477 long adjust = opd->adjust[OPD_NDX (sym->st_value
13478 + rel->r_addend)];
13479 if (adjust == -1)
13480 relocation = 0;
13481 else
13482 {
13483 /* If this is a relocation against the opd section sym
13484 and we have edited .opd, adjust the reloc addend so
13485 that ld -r and ld --emit-relocs output is correct.
13486 If it is a reloc against some other .opd symbol,
13487 then the symbol value will be adjusted later. */
13488 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
13489 rel->r_addend += adjust;
13490 else
13491 relocation += adjust;
13492 }
13493 }
13494 }
13495 else
13496 {
13497 bfd_boolean ignored;
13498
13499 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
13500 r_symndx, symtab_hdr, sym_hashes,
13501 h_elf, sec, relocation,
13502 unresolved_reloc, warned, ignored);
13503 sym_name = h_elf->root.root.string;
13504 sym_type = h_elf->type;
13505 if (sec != NULL
13506 && sec->owner == output_bfd
13507 && strcmp (sec->name, ".opd") == 0)
13508 {
13509 /* This is a symbol defined in a linker script. All
13510 such are defined in output sections, even those
13511 defined by simple assignment from a symbol defined in
13512 an input section. Transfer the symbol to an
13513 appropriate input .opd section, so that a branch to
13514 this symbol will be mapped to the location specified
13515 by the opd entry. */
13516 struct bfd_link_order *lo;
13517 for (lo = sec->map_head.link_order; lo != NULL; lo = lo->next)
13518 if (lo->type == bfd_indirect_link_order)
13519 {
13520 asection *isec = lo->u.indirect.section;
13521 if (h_elf->root.u.def.value >= isec->output_offset
13522 && h_elf->root.u.def.value < (isec->output_offset
13523 + isec->size))
13524 {
13525 h_elf->root.u.def.value -= isec->output_offset;
13526 h_elf->root.u.def.section = isec;
13527 sec = isec;
13528 break;
13529 }
13530 }
13531 }
13532 }
13533 h = (struct ppc_link_hash_entry *) h_elf;
13534
13535 if (sec != NULL && discarded_section (sec))
13536 {
13537 _bfd_clear_contents (ppc64_elf_howto_table[r_type],
13538 input_bfd, input_section,
13539 contents + rel->r_offset);
13540 wrel->r_offset = rel->r_offset;
13541 wrel->r_info = 0;
13542 wrel->r_addend = 0;
13543
13544 /* For ld -r, remove relocations in debug sections against
13545 symbols defined in discarded sections. Not done for
13546 non-debug to preserve relocs in .eh_frame which the
13547 eh_frame editing code expects to be present. */
13548 if (bfd_link_relocatable (info)
13549 && (input_section->flags & SEC_DEBUGGING))
13550 wrel--;
13551
13552 continue;
13553 }
13554
13555 if (bfd_link_relocatable (info))
13556 goto copy_reloc;
13557
13558 if (h != NULL && &h->elf == htab->elf.hgot)
13559 {
13560 relocation = TOCstart + htab->sec_info[input_section->id].toc_off;
13561 sec = bfd_abs_section_ptr;
13562 unresolved_reloc = FALSE;
13563 }
13564
13565 /* TLS optimizations. Replace instruction sequences and relocs
13566 based on information we collected in tls_optimize. We edit
13567 RELOCS so that --emit-relocs will output something sensible
13568 for the final instruction stream. */
13569 tls_mask = 0;
13570 tls_gd = 0;
13571 toc_symndx = 0;
13572 if (h != NULL)
13573 tls_mask = h->tls_mask;
13574 else if (local_got_ents != NULL)
13575 {
13576 struct plt_entry **local_plt = (struct plt_entry **)
13577 (local_got_ents + symtab_hdr->sh_info);
13578 unsigned char *lgot_masks = (unsigned char *)
13579 (local_plt + symtab_hdr->sh_info);
13580 tls_mask = lgot_masks[r_symndx];
13581 }
13582 if (tls_mask == 0
13583 && (r_type == R_PPC64_TLS
13584 || r_type == R_PPC64_TLSGD
13585 || r_type == R_PPC64_TLSLD))
13586 {
13587 /* Check for toc tls entries. */
13588 unsigned char *toc_tls;
13589
13590 if (!get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
13591 &local_syms, rel, input_bfd))
13592 return FALSE;
13593
13594 if (toc_tls)
13595 tls_mask = *toc_tls;
13596 }
13597
13598 /* Check that tls relocs are used with tls syms, and non-tls
13599 relocs are used with non-tls syms. */
13600 if (r_symndx != STN_UNDEF
13601 && r_type != R_PPC64_NONE
13602 && (h == NULL
13603 || h->elf.root.type == bfd_link_hash_defined
13604 || h->elf.root.type == bfd_link_hash_defweak)
13605 && (IS_PPC64_TLS_RELOC (r_type)
13606 != (sym_type == STT_TLS
13607 || (sym_type == STT_SECTION
13608 && (sec->flags & SEC_THREAD_LOCAL) != 0))))
13609 {
13610 if (tls_mask != 0
13611 && (r_type == R_PPC64_TLS
13612 || r_type == R_PPC64_TLSGD
13613 || r_type == R_PPC64_TLSLD))
13614 /* R_PPC64_TLS is OK against a symbol in the TOC. */
13615 ;
13616 else
13617 info->callbacks->einfo
13618 (!IS_PPC64_TLS_RELOC (r_type)
13619 /* xgettext:c-format */
13620 ? _("%H: %s used with TLS symbol `%T'\n")
13621 /* xgettext:c-format */
13622 : _("%H: %s used with non-TLS symbol `%T'\n"),
13623 input_bfd, input_section, rel->r_offset,
13624 ppc64_elf_howto_table[r_type]->name,
13625 sym_name);
13626 }
13627
13628 /* Ensure reloc mapping code below stays sane. */
13629 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
13630 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
13631 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
13632 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
13633 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
13634 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
13635 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
13636 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
13637 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
13638 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
13639 abort ();
13640
13641 switch (r_type)
13642 {
13643 default:
13644 break;
13645
13646 case R_PPC64_LO_DS_OPT:
13647 insn = bfd_get_32 (input_bfd, contents + rel->r_offset - d_offset);
13648 if ((insn & (0x3f << 26)) != 58u << 26)
13649 abort ();
13650 insn += (14u << 26) - (58u << 26);
13651 bfd_put_32 (input_bfd, insn, contents + rel->r_offset - d_offset);
13652 r_type = R_PPC64_TOC16_LO;
13653 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13654 break;
13655
13656 case R_PPC64_TOC16:
13657 case R_PPC64_TOC16_LO:
13658 case R_PPC64_TOC16_DS:
13659 case R_PPC64_TOC16_LO_DS:
13660 {
13661 /* Check for toc tls entries. */
13662 unsigned char *toc_tls;
13663 int retval;
13664
13665 retval = get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
13666 &local_syms, rel, input_bfd);
13667 if (retval == 0)
13668 return FALSE;
13669
13670 if (toc_tls)
13671 {
13672 tls_mask = *toc_tls;
13673 if (r_type == R_PPC64_TOC16_DS
13674 || r_type == R_PPC64_TOC16_LO_DS)
13675 {
13676 if (tls_mask != 0
13677 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
13678 goto toctprel;
13679 }
13680 else
13681 {
13682 /* If we found a GD reloc pair, then we might be
13683 doing a GD->IE transition. */
13684 if (retval == 2)
13685 {
13686 tls_gd = TLS_TPRELGD;
13687 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13688 goto tls_ldgd_opt;
13689 }
13690 else if (retval == 3)
13691 {
13692 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13693 goto tls_ldgd_opt;
13694 }
13695 }
13696 }
13697 }
13698 break;
13699
13700 case R_PPC64_GOT_TPREL16_HI:
13701 case R_PPC64_GOT_TPREL16_HA:
13702 if (tls_mask != 0
13703 && (tls_mask & TLS_TPREL) == 0)
13704 {
13705 rel->r_offset -= d_offset;
13706 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
13707 r_type = R_PPC64_NONE;
13708 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13709 }
13710 break;
13711
13712 case R_PPC64_GOT_TPREL16_DS:
13713 case R_PPC64_GOT_TPREL16_LO_DS:
13714 if (tls_mask != 0
13715 && (tls_mask & TLS_TPREL) == 0)
13716 {
13717 toctprel:
13718 insn = bfd_get_32 (input_bfd,
13719 contents + rel->r_offset - d_offset);
13720 insn &= 31 << 21;
13721 insn |= 0x3c0d0000; /* addis 0,13,0 */
13722 bfd_put_32 (input_bfd, insn,
13723 contents + rel->r_offset - d_offset);
13724 r_type = R_PPC64_TPREL16_HA;
13725 if (toc_symndx != 0)
13726 {
13727 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
13728 rel->r_addend = toc_addend;
13729 /* We changed the symbol. Start over in order to
13730 get h, sym, sec etc. right. */
13731 goto again;
13732 }
13733 else
13734 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13735 }
13736 break;
13737
13738 case R_PPC64_TLS:
13739 if (tls_mask != 0
13740 && (tls_mask & TLS_TPREL) == 0)
13741 {
13742 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
13743 insn = _bfd_elf_ppc_at_tls_transform (insn, 13);
13744 if (insn == 0)
13745 abort ();
13746 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
13747 /* Was PPC64_TLS which sits on insn boundary, now
13748 PPC64_TPREL16_LO which is at low-order half-word. */
13749 rel->r_offset += d_offset;
13750 r_type = R_PPC64_TPREL16_LO;
13751 if (toc_symndx != 0)
13752 {
13753 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
13754 rel->r_addend = toc_addend;
13755 /* We changed the symbol. Start over in order to
13756 get h, sym, sec etc. right. */
13757 goto again;
13758 }
13759 else
13760 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13761 }
13762 break;
13763
13764 case R_PPC64_GOT_TLSGD16_HI:
13765 case R_PPC64_GOT_TLSGD16_HA:
13766 tls_gd = TLS_TPRELGD;
13767 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13768 goto tls_gdld_hi;
13769 break;
13770
13771 case R_PPC64_GOT_TLSLD16_HI:
13772 case R_PPC64_GOT_TLSLD16_HA:
13773 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13774 {
13775 tls_gdld_hi:
13776 if ((tls_mask & tls_gd) != 0)
13777 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
13778 + R_PPC64_GOT_TPREL16_DS);
13779 else
13780 {
13781 rel->r_offset -= d_offset;
13782 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
13783 r_type = R_PPC64_NONE;
13784 }
13785 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13786 }
13787 break;
13788
13789 case R_PPC64_GOT_TLSGD16:
13790 case R_PPC64_GOT_TLSGD16_LO:
13791 tls_gd = TLS_TPRELGD;
13792 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13793 goto tls_ldgd_opt;
13794 break;
13795
13796 case R_PPC64_GOT_TLSLD16:
13797 case R_PPC64_GOT_TLSLD16_LO:
13798 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13799 {
13800 unsigned int insn1, insn2;
13801 bfd_vma offset;
13802
13803 tls_ldgd_opt:
13804 offset = (bfd_vma) -1;
13805 /* If not using the newer R_PPC64_TLSGD/LD to mark
13806 __tls_get_addr calls, we must trust that the call
13807 stays with its arg setup insns, ie. that the next
13808 reloc is the __tls_get_addr call associated with
13809 the current reloc. Edit both insns. */
13810 if (input_section->has_tls_get_addr_call
13811 && rel + 1 < relend
13812 && branch_reloc_hash_match (input_bfd, rel + 1,
13813 htab->tls_get_addr,
13814 htab->tls_get_addr_fd))
13815 offset = rel[1].r_offset;
13816 /* We read the low GOT_TLS (or TOC16) insn because we
13817 need to keep the destination reg. It may be
13818 something other than the usual r3, and moved to r3
13819 before the call by intervening code. */
13820 insn1 = bfd_get_32 (input_bfd,
13821 contents + rel->r_offset - d_offset);
13822 if ((tls_mask & tls_gd) != 0)
13823 {
13824 /* IE */
13825 insn1 &= (0x1f << 21) | (0x1f << 16);
13826 insn1 |= 58 << 26; /* ld */
13827 insn2 = 0x7c636a14; /* add 3,3,13 */
13828 if (offset != (bfd_vma) -1)
13829 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13830 if ((tls_mask & TLS_EXPLICIT) == 0)
13831 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
13832 + R_PPC64_GOT_TPREL16_DS);
13833 else
13834 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
13835 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13836 }
13837 else
13838 {
13839 /* LE */
13840 insn1 &= 0x1f << 21;
13841 insn1 |= 0x3c0d0000; /* addis r,13,0 */
13842 insn2 = 0x38630000; /* addi 3,3,0 */
13843 if (tls_gd == 0)
13844 {
13845 /* Was an LD reloc. */
13846 if (toc_symndx)
13847 sec = local_sections[toc_symndx];
13848 for (r_symndx = 0;
13849 r_symndx < symtab_hdr->sh_info;
13850 r_symndx++)
13851 if (local_sections[r_symndx] == sec)
13852 break;
13853 if (r_symndx >= symtab_hdr->sh_info)
13854 r_symndx = STN_UNDEF;
13855 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
13856 if (r_symndx != STN_UNDEF)
13857 rel->r_addend -= (local_syms[r_symndx].st_value
13858 + sec->output_offset
13859 + sec->output_section->vma);
13860 }
13861 else if (toc_symndx != 0)
13862 {
13863 r_symndx = toc_symndx;
13864 rel->r_addend = toc_addend;
13865 }
13866 r_type = R_PPC64_TPREL16_HA;
13867 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13868 if (offset != (bfd_vma) -1)
13869 {
13870 rel[1].r_info = ELF64_R_INFO (r_symndx,
13871 R_PPC64_TPREL16_LO);
13872 rel[1].r_offset = offset + d_offset;
13873 rel[1].r_addend = rel->r_addend;
13874 }
13875 }
13876 bfd_put_32 (input_bfd, insn1,
13877 contents + rel->r_offset - d_offset);
13878 if (offset != (bfd_vma) -1)
13879 bfd_put_32 (input_bfd, insn2, contents + offset);
13880 if ((tls_mask & tls_gd) == 0
13881 && (tls_gd == 0 || toc_symndx != 0))
13882 {
13883 /* We changed the symbol. Start over in order
13884 to get h, sym, sec etc. right. */
13885 goto again;
13886 }
13887 }
13888 break;
13889
13890 case R_PPC64_TLSGD:
13891 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13892 {
13893 unsigned int insn2;
13894 bfd_vma offset = rel->r_offset;
13895
13896 if ((tls_mask & TLS_TPRELGD) != 0)
13897 {
13898 /* IE */
13899 r_type = R_PPC64_NONE;
13900 insn2 = 0x7c636a14; /* add 3,3,13 */
13901 }
13902 else
13903 {
13904 /* LE */
13905 if (toc_symndx != 0)
13906 {
13907 r_symndx = toc_symndx;
13908 rel->r_addend = toc_addend;
13909 }
13910 r_type = R_PPC64_TPREL16_LO;
13911 rel->r_offset = offset + d_offset;
13912 insn2 = 0x38630000; /* addi 3,3,0 */
13913 }
13914 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13915 /* Zap the reloc on the _tls_get_addr call too. */
13916 BFD_ASSERT (offset == rel[1].r_offset);
13917 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13918 bfd_put_32 (input_bfd, insn2, contents + offset);
13919 if ((tls_mask & TLS_TPRELGD) == 0 && toc_symndx != 0)
13920 goto again;
13921 }
13922 break;
13923
13924 case R_PPC64_TLSLD:
13925 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13926 {
13927 unsigned int insn2;
13928 bfd_vma offset = rel->r_offset;
13929
13930 if (toc_symndx)
13931 sec = local_sections[toc_symndx];
13932 for (r_symndx = 0;
13933 r_symndx < symtab_hdr->sh_info;
13934 r_symndx++)
13935 if (local_sections[r_symndx] == sec)
13936 break;
13937 if (r_symndx >= symtab_hdr->sh_info)
13938 r_symndx = STN_UNDEF;
13939 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
13940 if (r_symndx != STN_UNDEF)
13941 rel->r_addend -= (local_syms[r_symndx].st_value
13942 + sec->output_offset
13943 + sec->output_section->vma);
13944
13945 r_type = R_PPC64_TPREL16_LO;
13946 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13947 rel->r_offset = offset + d_offset;
13948 /* Zap the reloc on the _tls_get_addr call too. */
13949 BFD_ASSERT (offset == rel[1].r_offset);
13950 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13951 insn2 = 0x38630000; /* addi 3,3,0 */
13952 bfd_put_32 (input_bfd, insn2, contents + offset);
13953 goto again;
13954 }
13955 break;
13956
13957 case R_PPC64_DTPMOD64:
13958 if (rel + 1 < relend
13959 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
13960 && rel[1].r_offset == rel->r_offset + 8)
13961 {
13962 if ((tls_mask & TLS_GD) == 0)
13963 {
13964 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
13965 if ((tls_mask & TLS_TPRELGD) != 0)
13966 r_type = R_PPC64_TPREL64;
13967 else
13968 {
13969 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
13970 r_type = R_PPC64_NONE;
13971 }
13972 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13973 }
13974 }
13975 else
13976 {
13977 if ((tls_mask & TLS_LD) == 0)
13978 {
13979 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
13980 r_type = R_PPC64_NONE;
13981 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13982 }
13983 }
13984 break;
13985
13986 case R_PPC64_TPREL64:
13987 if ((tls_mask & TLS_TPREL) == 0)
13988 {
13989 r_type = R_PPC64_NONE;
13990 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13991 }
13992 break;
13993
13994 case R_PPC64_ENTRY:
13995 relocation = TOCstart + htab->sec_info[input_section->id].toc_off;
13996 if (!bfd_link_pic (info)
13997 && !info->traditional_format
13998 && relocation + 0x80008000 <= 0xffffffff)
13999 {
14000 unsigned int insn1, insn2;
14001
14002 insn1 = bfd_get_32 (input_bfd, contents + rel->r_offset);
14003 insn2 = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
14004 if ((insn1 & ~0xfffc) == LD_R2_0R12
14005 && insn2 == ADD_R2_R2_R12)
14006 {
14007 bfd_put_32 (input_bfd,
14008 LIS_R2 + PPC_HA (relocation),
14009 contents + rel->r_offset);
14010 bfd_put_32 (input_bfd,
14011 ADDI_R2_R2 + PPC_LO (relocation),
14012 contents + rel->r_offset + 4);
14013 }
14014 }
14015 else
14016 {
14017 relocation -= (rel->r_offset
14018 + input_section->output_offset
14019 + input_section->output_section->vma);
14020 if (relocation + 0x80008000 <= 0xffffffff)
14021 {
14022 unsigned int insn1, insn2;
14023
14024 insn1 = bfd_get_32 (input_bfd, contents + rel->r_offset);
14025 insn2 = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
14026 if ((insn1 & ~0xfffc) == LD_R2_0R12
14027 && insn2 == ADD_R2_R2_R12)
14028 {
14029 bfd_put_32 (input_bfd,
14030 ADDIS_R2_R12 + PPC_HA (relocation),
14031 contents + rel->r_offset);
14032 bfd_put_32 (input_bfd,
14033 ADDI_R2_R2 + PPC_LO (relocation),
14034 contents + rel->r_offset + 4);
14035 }
14036 }
14037 }
14038 break;
14039
14040 case R_PPC64_REL16_HA:
14041 /* If we are generating a non-PIC executable, edit
14042 . 0: addis 2,12,.TOC.-0b@ha
14043 . addi 2,2,.TOC.-0b@l
14044 used by ELFv2 global entry points to set up r2, to
14045 . lis 2,.TOC.@ha
14046 . addi 2,2,.TOC.@l
14047 if .TOC. is in range. */
14048 if (!bfd_link_pic (info)
14049 && !info->traditional_format
14050 && !htab->opd_abi
14051 && rel->r_addend == d_offset
14052 && h != NULL && &h->elf == htab->elf.hgot
14053 && rel + 1 < relend
14054 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_REL16_LO)
14055 && rel[1].r_offset == rel->r_offset + 4
14056 && rel[1].r_addend == rel->r_addend + 4
14057 && relocation + 0x80008000 <= 0xffffffff)
14058 {
14059 unsigned int insn1, insn2;
14060 bfd_vma offset = rel->r_offset - d_offset;
14061 insn1 = bfd_get_32 (input_bfd, contents + offset);
14062 insn2 = bfd_get_32 (input_bfd, contents + offset + 4);
14063 if ((insn1 & 0xffff0000) == ADDIS_R2_R12
14064 && (insn2 & 0xffff0000) == ADDI_R2_R2)
14065 {
14066 r_type = R_PPC64_ADDR16_HA;
14067 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14068 rel->r_addend -= d_offset;
14069 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_ADDR16_LO);
14070 rel[1].r_addend -= d_offset + 4;
14071 bfd_put_32 (input_bfd, LIS_R2, contents + offset);
14072 }
14073 }
14074 break;
14075 }
14076
14077 /* Handle other relocations that tweak non-addend part of insn. */
14078 insn = 0;
14079 max_br_offset = 1 << 25;
14080 addend = rel->r_addend;
14081 reloc_dest = DEST_NORMAL;
14082 switch (r_type)
14083 {
14084 default:
14085 break;
14086
14087 case R_PPC64_TOCSAVE:
14088 if (relocation + addend == (rel->r_offset
14089 + input_section->output_offset
14090 + input_section->output_section->vma)
14091 && tocsave_find (htab, NO_INSERT,
14092 &local_syms, rel, input_bfd))
14093 {
14094 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
14095 if (insn == NOP
14096 || insn == CROR_151515 || insn == CROR_313131)
14097 bfd_put_32 (input_bfd,
14098 STD_R2_0R1 + STK_TOC (htab),
14099 contents + rel->r_offset);
14100 }
14101 break;
14102
14103 /* Branch taken prediction relocations. */
14104 case R_PPC64_ADDR14_BRTAKEN:
14105 case R_PPC64_REL14_BRTAKEN:
14106 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
14107 /* Fall through. */
14108
14109 /* Branch not taken prediction relocations. */
14110 case R_PPC64_ADDR14_BRNTAKEN:
14111 case R_PPC64_REL14_BRNTAKEN:
14112 insn |= bfd_get_32 (input_bfd,
14113 contents + rel->r_offset) & ~(0x01 << 21);
14114 /* Fall through. */
14115
14116 case R_PPC64_REL14:
14117 max_br_offset = 1 << 15;
14118 /* Fall through. */
14119
14120 case R_PPC64_REL24:
14121 /* Calls to functions with a different TOC, such as calls to
14122 shared objects, need to alter the TOC pointer. This is
14123 done using a linkage stub. A REL24 branching to these
14124 linkage stubs needs to be followed by a nop, as the nop
14125 will be replaced with an instruction to restore the TOC
14126 base pointer. */
14127 fdh = h;
14128 if (h != NULL
14129 && h->oh != NULL
14130 && h->oh->is_func_descriptor)
14131 fdh = ppc_follow_link (h->oh);
14132 stub_entry = ppc_get_stub_entry (input_section, sec, fdh, &orig_rel,
14133 htab);
14134 if (stub_entry != NULL
14135 && (stub_entry->stub_type == ppc_stub_plt_call
14136 || stub_entry->stub_type == ppc_stub_plt_call_r2save
14137 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
14138 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
14139 {
14140 bfd_boolean can_plt_call = FALSE;
14141
14142 if (stub_entry->stub_type == ppc_stub_plt_call
14143 && !htab->opd_abi
14144 && htab->params->plt_localentry0 != 0
14145 && is_elfv2_localentry0 (&h->elf))
14146 {
14147 /* The function doesn't use or change r2. */
14148 can_plt_call = TRUE;
14149 }
14150
14151 /* All of these stubs may modify r2, so there must be a
14152 branch and link followed by a nop. The nop is
14153 replaced by an insn to restore r2. */
14154 else if (rel->r_offset + 8 <= input_section->size)
14155 {
14156 unsigned long br;
14157
14158 br = bfd_get_32 (input_bfd,
14159 contents + rel->r_offset);
14160 if ((br & 1) != 0)
14161 {
14162 unsigned long nop;
14163
14164 nop = bfd_get_32 (input_bfd,
14165 contents + rel->r_offset + 4);
14166 if (nop == NOP
14167 || nop == CROR_151515 || nop == CROR_313131)
14168 {
14169 if (h != NULL
14170 && (h == htab->tls_get_addr_fd
14171 || h == htab->tls_get_addr)
14172 && htab->params->tls_get_addr_opt)
14173 {
14174 /* Special stub used, leave nop alone. */
14175 }
14176 else
14177 bfd_put_32 (input_bfd,
14178 LD_R2_0R1 + STK_TOC (htab),
14179 contents + rel->r_offset + 4);
14180 can_plt_call = TRUE;
14181 }
14182 }
14183 }
14184
14185 if (!can_plt_call && h != NULL)
14186 {
14187 const char *name = h->elf.root.root.string;
14188
14189 if (*name == '.')
14190 ++name;
14191
14192 if (strncmp (name, "__libc_start_main", 17) == 0
14193 && (name[17] == 0 || name[17] == '@'))
14194 {
14195 /* Allow crt1 branch to go via a toc adjusting
14196 stub. Other calls that never return could do
14197 the same, if we could detect such. */
14198 can_plt_call = TRUE;
14199 }
14200 }
14201
14202 if (!can_plt_call)
14203 {
14204 /* g++ as of 20130507 emits self-calls without a
14205 following nop. This is arguably wrong since we
14206 have conflicting information. On the one hand a
14207 global symbol and on the other a local call
14208 sequence, but don't error for this special case.
14209 It isn't possible to cheaply verify we have
14210 exactly such a call. Allow all calls to the same
14211 section. */
14212 asection *code_sec = sec;
14213
14214 if (get_opd_info (sec) != NULL)
14215 {
14216 bfd_vma off = (relocation + addend
14217 - sec->output_section->vma
14218 - sec->output_offset);
14219
14220 opd_entry_value (sec, off, &code_sec, NULL, FALSE);
14221 }
14222 if (code_sec == input_section)
14223 can_plt_call = TRUE;
14224 }
14225
14226 if (!can_plt_call)
14227 {
14228 if (stub_entry->stub_type == ppc_stub_plt_call
14229 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14230 info->callbacks->einfo
14231 /* xgettext:c-format */
14232 (_("%H: call to `%T' lacks nop, can't restore toc; "
14233 "recompile with -fPIC\n"),
14234 input_bfd, input_section, rel->r_offset, sym_name);
14235 else
14236 info->callbacks->einfo
14237 /* xgettext:c-format */
14238 (_("%H: call to `%T' lacks nop, can't restore toc; "
14239 "(-mcmodel=small toc adjust stub)\n"),
14240 input_bfd, input_section, rel->r_offset, sym_name);
14241
14242 bfd_set_error (bfd_error_bad_value);
14243 ret = FALSE;
14244 }
14245
14246 if (can_plt_call
14247 && (stub_entry->stub_type == ppc_stub_plt_call
14248 || stub_entry->stub_type == ppc_stub_plt_call_r2save))
14249 unresolved_reloc = FALSE;
14250 }
14251
14252 if ((stub_entry == NULL
14253 || stub_entry->stub_type == ppc_stub_long_branch
14254 || stub_entry->stub_type == ppc_stub_plt_branch)
14255 && get_opd_info (sec) != NULL)
14256 {
14257 /* The branch destination is the value of the opd entry. */
14258 bfd_vma off = (relocation + addend
14259 - sec->output_section->vma
14260 - sec->output_offset);
14261 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL, FALSE);
14262 if (dest != (bfd_vma) -1)
14263 {
14264 relocation = dest;
14265 addend = 0;
14266 reloc_dest = DEST_OPD;
14267 }
14268 }
14269
14270 /* If the branch is out of reach we ought to have a long
14271 branch stub. */
14272 from = (rel->r_offset
14273 + input_section->output_offset
14274 + input_section->output_section->vma);
14275
14276 relocation += PPC64_LOCAL_ENTRY_OFFSET (fdh
14277 ? fdh->elf.other
14278 : sym->st_other);
14279
14280 if (stub_entry != NULL
14281 && (stub_entry->stub_type == ppc_stub_long_branch
14282 || stub_entry->stub_type == ppc_stub_plt_branch)
14283 && (r_type == R_PPC64_ADDR14_BRTAKEN
14284 || r_type == R_PPC64_ADDR14_BRNTAKEN
14285 || (relocation + addend - from + max_br_offset
14286 < 2 * max_br_offset)))
14287 /* Don't use the stub if this branch is in range. */
14288 stub_entry = NULL;
14289
14290 if (stub_entry != NULL)
14291 {
14292 /* Munge up the value and addend so that we call the stub
14293 rather than the procedure directly. */
14294 asection *stub_sec = stub_entry->group->stub_sec;
14295
14296 if (stub_entry->stub_type == ppc_stub_save_res)
14297 relocation += (stub_sec->output_offset
14298 + stub_sec->output_section->vma
14299 + stub_sec->size - htab->sfpr->size
14300 - htab->sfpr->output_offset
14301 - htab->sfpr->output_section->vma);
14302 else
14303 relocation = (stub_entry->stub_offset
14304 + stub_sec->output_offset
14305 + stub_sec->output_section->vma);
14306 addend = 0;
14307 reloc_dest = DEST_STUB;
14308
14309 if ((stub_entry->stub_type == ppc_stub_plt_call
14310 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14311 && (ALWAYS_EMIT_R2SAVE
14312 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14313 && rel + 1 < relend
14314 && rel[1].r_offset == rel->r_offset + 4
14315 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOCSAVE)
14316 relocation += 4;
14317 }
14318
14319 if (insn != 0)
14320 {
14321 if (is_isa_v2)
14322 {
14323 /* Set 'a' bit. This is 0b00010 in BO field for branch
14324 on CR(BI) insns (BO == 001at or 011at), and 0b01000
14325 for branch on CTR insns (BO == 1a00t or 1a01t). */
14326 if ((insn & (0x14 << 21)) == (0x04 << 21))
14327 insn |= 0x02 << 21;
14328 else if ((insn & (0x14 << 21)) == (0x10 << 21))
14329 insn |= 0x08 << 21;
14330 else
14331 break;
14332 }
14333 else
14334 {
14335 /* Invert 'y' bit if not the default. */
14336 if ((bfd_signed_vma) (relocation + addend - from) < 0)
14337 insn ^= 0x01 << 21;
14338 }
14339
14340 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
14341 }
14342
14343 /* NOP out calls to undefined weak functions.
14344 We can thus call a weak function without first
14345 checking whether the function is defined. */
14346 else if (h != NULL
14347 && h->elf.root.type == bfd_link_hash_undefweak
14348 && h->elf.dynindx == -1
14349 && r_type == R_PPC64_REL24
14350 && relocation == 0
14351 && addend == 0)
14352 {
14353 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
14354 goto copy_reloc;
14355 }
14356 break;
14357 }
14358
14359 /* Set `addend'. */
14360 tls_type = 0;
14361 switch (r_type)
14362 {
14363 default:
14364 info->callbacks->einfo
14365 /* xgettext:c-format */
14366 (_("%P: %B: unknown relocation type %d for `%T'\n"),
14367 input_bfd, (int) r_type, sym_name);
14368
14369 bfd_set_error (bfd_error_bad_value);
14370 ret = FALSE;
14371 goto copy_reloc;
14372
14373 case R_PPC64_NONE:
14374 case R_PPC64_TLS:
14375 case R_PPC64_TLSGD:
14376 case R_PPC64_TLSLD:
14377 case R_PPC64_TOCSAVE:
14378 case R_PPC64_GNU_VTINHERIT:
14379 case R_PPC64_GNU_VTENTRY:
14380 case R_PPC64_ENTRY:
14381 goto copy_reloc;
14382
14383 /* GOT16 relocations. Like an ADDR16 using the symbol's
14384 address in the GOT as relocation value instead of the
14385 symbol's value itself. Also, create a GOT entry for the
14386 symbol and put the symbol value there. */
14387 case R_PPC64_GOT_TLSGD16:
14388 case R_PPC64_GOT_TLSGD16_LO:
14389 case R_PPC64_GOT_TLSGD16_HI:
14390 case R_PPC64_GOT_TLSGD16_HA:
14391 tls_type = TLS_TLS | TLS_GD;
14392 goto dogot;
14393
14394 case R_PPC64_GOT_TLSLD16:
14395 case R_PPC64_GOT_TLSLD16_LO:
14396 case R_PPC64_GOT_TLSLD16_HI:
14397 case R_PPC64_GOT_TLSLD16_HA:
14398 tls_type = TLS_TLS | TLS_LD;
14399 goto dogot;
14400
14401 case R_PPC64_GOT_TPREL16_DS:
14402 case R_PPC64_GOT_TPREL16_LO_DS:
14403 case R_PPC64_GOT_TPREL16_HI:
14404 case R_PPC64_GOT_TPREL16_HA:
14405 tls_type = TLS_TLS | TLS_TPREL;
14406 goto dogot;
14407
14408 case R_PPC64_GOT_DTPREL16_DS:
14409 case R_PPC64_GOT_DTPREL16_LO_DS:
14410 case R_PPC64_GOT_DTPREL16_HI:
14411 case R_PPC64_GOT_DTPREL16_HA:
14412 tls_type = TLS_TLS | TLS_DTPREL;
14413 goto dogot;
14414
14415 case R_PPC64_GOT16:
14416 case R_PPC64_GOT16_LO:
14417 case R_PPC64_GOT16_HI:
14418 case R_PPC64_GOT16_HA:
14419 case R_PPC64_GOT16_DS:
14420 case R_PPC64_GOT16_LO_DS:
14421 dogot:
14422 {
14423 /* Relocation is to the entry for this symbol in the global
14424 offset table. */
14425 asection *got;
14426 bfd_vma *offp;
14427 bfd_vma off;
14428 unsigned long indx = 0;
14429 struct got_entry *ent;
14430
14431 if (tls_type == (TLS_TLS | TLS_LD)
14432 && (h == NULL
14433 || !h->elf.def_dynamic))
14434 ent = ppc64_tlsld_got (input_bfd);
14435 else
14436 {
14437 if (h != NULL)
14438 {
14439 if (!htab->elf.dynamic_sections_created
14440 || h->elf.dynindx == -1
14441 || SYMBOL_REFERENCES_LOCAL (info, &h->elf)
14442 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, &h->elf))
14443 /* This is actually a static link, or it is a
14444 -Bsymbolic link and the symbol is defined
14445 locally, or the symbol was forced to be local
14446 because of a version file. */
14447 ;
14448 else
14449 {
14450 indx = h->elf.dynindx;
14451 unresolved_reloc = FALSE;
14452 }
14453 ent = h->elf.got.glist;
14454 }
14455 else
14456 {
14457 if (local_got_ents == NULL)
14458 abort ();
14459 ent = local_got_ents[r_symndx];
14460 }
14461
14462 for (; ent != NULL; ent = ent->next)
14463 if (ent->addend == orig_rel.r_addend
14464 && ent->owner == input_bfd
14465 && ent->tls_type == tls_type)
14466 break;
14467 }
14468
14469 if (ent == NULL)
14470 abort ();
14471 if (ent->is_indirect)
14472 ent = ent->got.ent;
14473 offp = &ent->got.offset;
14474 got = ppc64_elf_tdata (ent->owner)->got;
14475 if (got == NULL)
14476 abort ();
14477
14478 /* The offset must always be a multiple of 8. We use the
14479 least significant bit to record whether we have already
14480 processed this entry. */
14481 off = *offp;
14482 if ((off & 1) != 0)
14483 off &= ~1;
14484 else
14485 {
14486 /* Generate relocs for the dynamic linker, except in
14487 the case of TLSLD where we'll use one entry per
14488 module. */
14489 asection *relgot;
14490 bfd_boolean ifunc;
14491
14492 *offp = off | 1;
14493 relgot = NULL;
14494 ifunc = (h != NULL
14495 ? h->elf.type == STT_GNU_IFUNC
14496 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC);
14497 if (ifunc)
14498 {
14499 relgot = htab->elf.irelplt;
14500 if (indx == 0)
14501 htab->local_ifunc_resolver = 1;
14502 else if (is_static_defined (&h->elf))
14503 htab->maybe_local_ifunc_resolver = 1;
14504 }
14505 else if (indx != 0
14506 || (bfd_link_pic (info)
14507 && (h == NULL
14508 || !UNDEFWEAK_NO_DYNAMIC_RELOC (info, &h->elf)
14509 || (tls_type == (TLS_TLS | TLS_LD)
14510 && !h->elf.def_dynamic))))
14511 relgot = ppc64_elf_tdata (ent->owner)->relgot;
14512 if (relgot != NULL)
14513 {
14514 outrel.r_offset = (got->output_section->vma
14515 + got->output_offset
14516 + off);
14517 outrel.r_addend = addend;
14518 if (tls_type & (TLS_LD | TLS_GD))
14519 {
14520 outrel.r_addend = 0;
14521 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
14522 if (tls_type == (TLS_TLS | TLS_GD))
14523 {
14524 loc = relgot->contents;
14525 loc += (relgot->reloc_count++
14526 * sizeof (Elf64_External_Rela));
14527 bfd_elf64_swap_reloca_out (output_bfd,
14528 &outrel, loc);
14529 outrel.r_offset += 8;
14530 outrel.r_addend = addend;
14531 outrel.r_info
14532 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
14533 }
14534 }
14535 else if (tls_type == (TLS_TLS | TLS_DTPREL))
14536 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
14537 else if (tls_type == (TLS_TLS | TLS_TPREL))
14538 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
14539 else if (indx != 0)
14540 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
14541 else
14542 {
14543 if (ifunc)
14544 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
14545 else
14546 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
14547
14548 /* Write the .got section contents for the sake
14549 of prelink. */
14550 loc = got->contents + off;
14551 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
14552 loc);
14553 }
14554
14555 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
14556 {
14557 outrel.r_addend += relocation;
14558 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
14559 {
14560 if (htab->elf.tls_sec == NULL)
14561 outrel.r_addend = 0;
14562 else
14563 outrel.r_addend -= htab->elf.tls_sec->vma;
14564 }
14565 }
14566 loc = relgot->contents;
14567 loc += (relgot->reloc_count++
14568 * sizeof (Elf64_External_Rela));
14569 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
14570 }
14571
14572 /* Init the .got section contents here if we're not
14573 emitting a reloc. */
14574 else
14575 {
14576 relocation += addend;
14577 if (tls_type != 0)
14578 {
14579 if (htab->elf.tls_sec == NULL)
14580 relocation = 0;
14581 else
14582 {
14583 if (tls_type & TLS_LD)
14584 relocation = 0;
14585 else
14586 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
14587 if (tls_type & TLS_TPREL)
14588 relocation += DTP_OFFSET - TP_OFFSET;
14589 }
14590
14591 if (tls_type & (TLS_GD | TLS_LD))
14592 {
14593 bfd_put_64 (output_bfd, relocation,
14594 got->contents + off + 8);
14595 relocation = 1;
14596 }
14597 }
14598 bfd_put_64 (output_bfd, relocation,
14599 got->contents + off);
14600 }
14601 }
14602
14603 if (off >= (bfd_vma) -2)
14604 abort ();
14605
14606 relocation = got->output_section->vma + got->output_offset + off;
14607 addend = -(TOCstart + htab->sec_info[input_section->id].toc_off);
14608 }
14609 break;
14610
14611 case R_PPC64_PLT16_HA:
14612 case R_PPC64_PLT16_HI:
14613 case R_PPC64_PLT16_LO:
14614 case R_PPC64_PLT32:
14615 case R_PPC64_PLT64:
14616 /* Relocation is to the entry for this symbol in the
14617 procedure linkage table. */
14618 {
14619 struct plt_entry **plt_list = NULL;
14620 if (h != NULL)
14621 plt_list = &h->elf.plt.plist;
14622 else if (local_got_ents != NULL)
14623 {
14624 struct plt_entry **local_plt = (struct plt_entry **)
14625 (local_got_ents + symtab_hdr->sh_info);
14626 unsigned char *local_got_tls_masks = (unsigned char *)
14627 (local_plt + symtab_hdr->sh_info);
14628 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
14629 plt_list = local_plt + r_symndx;
14630 }
14631 if (plt_list)
14632 {
14633 struct plt_entry *ent;
14634
14635 for (ent = *plt_list; ent != NULL; ent = ent->next)
14636 if (ent->plt.offset != (bfd_vma) -1
14637 && ent->addend == orig_rel.r_addend)
14638 {
14639 asection *plt;
14640
14641 plt = htab->elf.splt;
14642 if (!htab->elf.dynamic_sections_created
14643 || h == NULL
14644 || h->elf.dynindx == -1)
14645 plt = htab->elf.iplt;
14646 relocation = (plt->output_section->vma
14647 + plt->output_offset
14648 + ent->plt.offset);
14649 addend = 0;
14650 unresolved_reloc = FALSE;
14651 break;
14652 }
14653 }
14654 }
14655 break;
14656
14657 case R_PPC64_TOC:
14658 /* Relocation value is TOC base. */
14659 relocation = TOCstart;
14660 if (r_symndx == STN_UNDEF)
14661 relocation += htab->sec_info[input_section->id].toc_off;
14662 else if (unresolved_reloc)
14663 ;
14664 else if (sec != NULL && sec->id < htab->sec_info_arr_size)
14665 relocation += htab->sec_info[sec->id].toc_off;
14666 else
14667 unresolved_reloc = TRUE;
14668 goto dodyn;
14669
14670 /* TOC16 relocs. We want the offset relative to the TOC base,
14671 which is the address of the start of the TOC plus 0x8000.
14672 The TOC consists of sections .got, .toc, .tocbss, and .plt,
14673 in this order. */
14674 case R_PPC64_TOC16:
14675 case R_PPC64_TOC16_LO:
14676 case R_PPC64_TOC16_HI:
14677 case R_PPC64_TOC16_DS:
14678 case R_PPC64_TOC16_LO_DS:
14679 case R_PPC64_TOC16_HA:
14680 addend -= TOCstart + htab->sec_info[input_section->id].toc_off;
14681 break;
14682
14683 /* Relocate against the beginning of the section. */
14684 case R_PPC64_SECTOFF:
14685 case R_PPC64_SECTOFF_LO:
14686 case R_PPC64_SECTOFF_HI:
14687 case R_PPC64_SECTOFF_DS:
14688 case R_PPC64_SECTOFF_LO_DS:
14689 case R_PPC64_SECTOFF_HA:
14690 if (sec != NULL)
14691 addend -= sec->output_section->vma;
14692 break;
14693
14694 case R_PPC64_REL16:
14695 case R_PPC64_REL16_LO:
14696 case R_PPC64_REL16_HI:
14697 case R_PPC64_REL16_HA:
14698 case R_PPC64_REL16DX_HA:
14699 break;
14700
14701 case R_PPC64_REL14:
14702 case R_PPC64_REL14_BRNTAKEN:
14703 case R_PPC64_REL14_BRTAKEN:
14704 case R_PPC64_REL24:
14705 break;
14706
14707 case R_PPC64_TPREL16:
14708 case R_PPC64_TPREL16_LO:
14709 case R_PPC64_TPREL16_HI:
14710 case R_PPC64_TPREL16_HA:
14711 case R_PPC64_TPREL16_DS:
14712 case R_PPC64_TPREL16_LO_DS:
14713 case R_PPC64_TPREL16_HIGH:
14714 case R_PPC64_TPREL16_HIGHA:
14715 case R_PPC64_TPREL16_HIGHER:
14716 case R_PPC64_TPREL16_HIGHERA:
14717 case R_PPC64_TPREL16_HIGHEST:
14718 case R_PPC64_TPREL16_HIGHESTA:
14719 if (h != NULL
14720 && h->elf.root.type == bfd_link_hash_undefweak
14721 && h->elf.dynindx == -1)
14722 {
14723 /* Make this relocation against an undefined weak symbol
14724 resolve to zero. This is really just a tweak, since
14725 code using weak externs ought to check that they are
14726 defined before using them. */
14727 bfd_byte *p = contents + rel->r_offset - d_offset;
14728
14729 insn = bfd_get_32 (input_bfd, p);
14730 insn = _bfd_elf_ppc_at_tprel_transform (insn, 13);
14731 if (insn != 0)
14732 bfd_put_32 (input_bfd, insn, p);
14733 break;
14734 }
14735 if (htab->elf.tls_sec != NULL)
14736 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
14737 /* The TPREL16 relocs shouldn't really be used in shared
14738 libs or with non-local symbols as that will result in
14739 DT_TEXTREL being set, but support them anyway. */
14740 goto dodyn;
14741
14742 case R_PPC64_DTPREL16:
14743 case R_PPC64_DTPREL16_LO:
14744 case R_PPC64_DTPREL16_HI:
14745 case R_PPC64_DTPREL16_HA:
14746 case R_PPC64_DTPREL16_DS:
14747 case R_PPC64_DTPREL16_LO_DS:
14748 case R_PPC64_DTPREL16_HIGH:
14749 case R_PPC64_DTPREL16_HIGHA:
14750 case R_PPC64_DTPREL16_HIGHER:
14751 case R_PPC64_DTPREL16_HIGHERA:
14752 case R_PPC64_DTPREL16_HIGHEST:
14753 case R_PPC64_DTPREL16_HIGHESTA:
14754 if (htab->elf.tls_sec != NULL)
14755 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
14756 break;
14757
14758 case R_PPC64_ADDR64_LOCAL:
14759 addend += PPC64_LOCAL_ENTRY_OFFSET (h != NULL
14760 ? h->elf.other
14761 : sym->st_other);
14762 break;
14763
14764 case R_PPC64_DTPMOD64:
14765 relocation = 1;
14766 addend = 0;
14767 goto dodyn;
14768
14769 case R_PPC64_TPREL64:
14770 if (htab->elf.tls_sec != NULL)
14771 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
14772 goto dodyn;
14773
14774 case R_PPC64_DTPREL64:
14775 if (htab->elf.tls_sec != NULL)
14776 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
14777 /* Fall through. */
14778
14779 /* Relocations that may need to be propagated if this is a
14780 dynamic object. */
14781 case R_PPC64_REL30:
14782 case R_PPC64_REL32:
14783 case R_PPC64_REL64:
14784 case R_PPC64_ADDR14:
14785 case R_PPC64_ADDR14_BRNTAKEN:
14786 case R_PPC64_ADDR14_BRTAKEN:
14787 case R_PPC64_ADDR16:
14788 case R_PPC64_ADDR16_DS:
14789 case R_PPC64_ADDR16_HA:
14790 case R_PPC64_ADDR16_HI:
14791 case R_PPC64_ADDR16_HIGH:
14792 case R_PPC64_ADDR16_HIGHA:
14793 case R_PPC64_ADDR16_HIGHER:
14794 case R_PPC64_ADDR16_HIGHERA:
14795 case R_PPC64_ADDR16_HIGHEST:
14796 case R_PPC64_ADDR16_HIGHESTA:
14797 case R_PPC64_ADDR16_LO:
14798 case R_PPC64_ADDR16_LO_DS:
14799 case R_PPC64_ADDR24:
14800 case R_PPC64_ADDR32:
14801 case R_PPC64_ADDR64:
14802 case R_PPC64_UADDR16:
14803 case R_PPC64_UADDR32:
14804 case R_PPC64_UADDR64:
14805 dodyn:
14806 if ((input_section->flags & SEC_ALLOC) == 0)
14807 break;
14808
14809 if (NO_OPD_RELOCS && is_opd)
14810 break;
14811
14812 if (bfd_link_pic (info)
14813 ? ((h == NULL
14814 || h->dyn_relocs != NULL)
14815 && ((h != NULL && pc_dynrelocs (h))
14816 || must_be_dyn_reloc (info, r_type)))
14817 : (h != NULL
14818 ? h->dyn_relocs != NULL
14819 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
14820 {
14821 bfd_boolean skip, relocate;
14822 asection *sreloc;
14823 bfd_vma out_off;
14824 long indx = 0;
14825
14826 /* When generating a dynamic object, these relocations
14827 are copied into the output file to be resolved at run
14828 time. */
14829
14830 skip = FALSE;
14831 relocate = FALSE;
14832
14833 out_off = _bfd_elf_section_offset (output_bfd, info,
14834 input_section, rel->r_offset);
14835 if (out_off == (bfd_vma) -1)
14836 skip = TRUE;
14837 else if (out_off == (bfd_vma) -2)
14838 skip = TRUE, relocate = TRUE;
14839 out_off += (input_section->output_section->vma
14840 + input_section->output_offset);
14841 outrel.r_offset = out_off;
14842 outrel.r_addend = rel->r_addend;
14843
14844 /* Optimize unaligned reloc use. */
14845 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
14846 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
14847 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
14848 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
14849 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
14850 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
14851 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
14852 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
14853 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
14854
14855 if (skip)
14856 memset (&outrel, 0, sizeof outrel);
14857 else if (!SYMBOL_REFERENCES_LOCAL (info, &h->elf)
14858 && !is_opd
14859 && r_type != R_PPC64_TOC)
14860 {
14861 indx = h->elf.dynindx;
14862 BFD_ASSERT (indx != -1);
14863 outrel.r_info = ELF64_R_INFO (indx, r_type);
14864 }
14865 else
14866 {
14867 /* This symbol is local, or marked to become local,
14868 or this is an opd section reloc which must point
14869 at a local function. */
14870 outrel.r_addend += relocation;
14871 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
14872 {
14873 if (is_opd && h != NULL)
14874 {
14875 /* Lie about opd entries. This case occurs
14876 when building shared libraries and we
14877 reference a function in another shared
14878 lib. The same thing happens for a weak
14879 definition in an application that's
14880 overridden by a strong definition in a
14881 shared lib. (I believe this is a generic
14882 bug in binutils handling of weak syms.)
14883 In these cases we won't use the opd
14884 entry in this lib. */
14885 unresolved_reloc = FALSE;
14886 }
14887 if (!is_opd
14888 && r_type == R_PPC64_ADDR64
14889 && (h != NULL
14890 ? h->elf.type == STT_GNU_IFUNC
14891 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
14892 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
14893 else
14894 {
14895 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
14896
14897 /* We need to relocate .opd contents for ld.so.
14898 Prelink also wants simple and consistent rules
14899 for relocs. This make all RELATIVE relocs have
14900 *r_offset equal to r_addend. */
14901 relocate = TRUE;
14902 }
14903 }
14904 else
14905 {
14906 if (h != NULL
14907 ? h->elf.type == STT_GNU_IFUNC
14908 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
14909 {
14910 info->callbacks->einfo
14911 /* xgettext:c-format */
14912 (_("%H: %s for indirect "
14913 "function `%T' unsupported\n"),
14914 input_bfd, input_section, rel->r_offset,
14915 ppc64_elf_howto_table[r_type]->name,
14916 sym_name);
14917 ret = FALSE;
14918 }
14919 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
14920 ;
14921 else if (sec == NULL || sec->owner == NULL)
14922 {
14923 bfd_set_error (bfd_error_bad_value);
14924 return FALSE;
14925 }
14926 else
14927 {
14928 asection *osec;
14929
14930 osec = sec->output_section;
14931 indx = elf_section_data (osec)->dynindx;
14932
14933 if (indx == 0)
14934 {
14935 if ((osec->flags & SEC_READONLY) == 0
14936 && htab->elf.data_index_section != NULL)
14937 osec = htab->elf.data_index_section;
14938 else
14939 osec = htab->elf.text_index_section;
14940 indx = elf_section_data (osec)->dynindx;
14941 }
14942 BFD_ASSERT (indx != 0);
14943
14944 /* We are turning this relocation into one
14945 against a section symbol, so subtract out
14946 the output section's address but not the
14947 offset of the input section in the output
14948 section. */
14949 outrel.r_addend -= osec->vma;
14950 }
14951
14952 outrel.r_info = ELF64_R_INFO (indx, r_type);
14953 }
14954 }
14955
14956 sreloc = elf_section_data (input_section)->sreloc;
14957 if (h != NULL
14958 ? h->elf.type == STT_GNU_IFUNC
14959 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
14960 {
14961 sreloc = htab->elf.irelplt;
14962 if (indx == 0)
14963 htab->local_ifunc_resolver = 1;
14964 else if (is_static_defined (&h->elf))
14965 htab->maybe_local_ifunc_resolver = 1;
14966 }
14967 if (sreloc == NULL)
14968 abort ();
14969
14970 if (sreloc->reloc_count * sizeof (Elf64_External_Rela)
14971 >= sreloc->size)
14972 abort ();
14973 loc = sreloc->contents;
14974 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
14975 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
14976
14977 /* If this reloc is against an external symbol, it will
14978 be computed at runtime, so there's no need to do
14979 anything now. However, for the sake of prelink ensure
14980 that the section contents are a known value. */
14981 if (! relocate)
14982 {
14983 unresolved_reloc = FALSE;
14984 /* The value chosen here is quite arbitrary as ld.so
14985 ignores section contents except for the special
14986 case of .opd where the contents might be accessed
14987 before relocation. Choose zero, as that won't
14988 cause reloc overflow. */
14989 relocation = 0;
14990 addend = 0;
14991 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
14992 to improve backward compatibility with older
14993 versions of ld. */
14994 if (r_type == R_PPC64_ADDR64)
14995 addend = outrel.r_addend;
14996 /* Adjust pc_relative relocs to have zero in *r_offset. */
14997 else if (ppc64_elf_howto_table[r_type]->pc_relative)
14998 addend = outrel.r_offset;
14999 }
15000 }
15001 break;
15002
15003 case R_PPC64_COPY:
15004 case R_PPC64_GLOB_DAT:
15005 case R_PPC64_JMP_SLOT:
15006 case R_PPC64_JMP_IREL:
15007 case R_PPC64_RELATIVE:
15008 /* We shouldn't ever see these dynamic relocs in relocatable
15009 files. */
15010 /* Fall through. */
15011
15012 case R_PPC64_PLTGOT16:
15013 case R_PPC64_PLTGOT16_DS:
15014 case R_PPC64_PLTGOT16_HA:
15015 case R_PPC64_PLTGOT16_HI:
15016 case R_PPC64_PLTGOT16_LO:
15017 case R_PPC64_PLTGOT16_LO_DS:
15018 case R_PPC64_PLTREL32:
15019 case R_PPC64_PLTREL64:
15020 /* These ones haven't been implemented yet. */
15021
15022 info->callbacks->einfo
15023 /* xgettext:c-format */
15024 (_("%P: %B: %s is not supported for `%T'\n"),
15025 input_bfd,
15026 ppc64_elf_howto_table[r_type]->name, sym_name);
15027
15028 bfd_set_error (bfd_error_invalid_operation);
15029 ret = FALSE;
15030 goto copy_reloc;
15031 }
15032
15033 /* Multi-instruction sequences that access the TOC can be
15034 optimized, eg. addis ra,r2,0; addi rb,ra,x;
15035 to nop; addi rb,r2,x; */
15036 howto = ppc64_elf_howto_table[(int) r_type];
15037 switch (r_type)
15038 {
15039 default:
15040 break;
15041
15042 case R_PPC64_GOT_TLSLD16_HI:
15043 case R_PPC64_GOT_TLSGD16_HI:
15044 case R_PPC64_GOT_TPREL16_HI:
15045 case R_PPC64_GOT_DTPREL16_HI:
15046 case R_PPC64_GOT16_HI:
15047 case R_PPC64_TOC16_HI:
15048 /* These relocs would only be useful if building up an
15049 offset to later add to r2, perhaps in an indexed
15050 addressing mode instruction. Don't try to optimize.
15051 Unfortunately, the possibility of someone building up an
15052 offset like this or even with the HA relocs, means that
15053 we need to check the high insn when optimizing the low
15054 insn. */
15055 break;
15056
15057 case R_PPC64_GOT_TLSLD16_HA:
15058 case R_PPC64_GOT_TLSGD16_HA:
15059 case R_PPC64_GOT_TPREL16_HA:
15060 case R_PPC64_GOT_DTPREL16_HA:
15061 case R_PPC64_GOT16_HA:
15062 case R_PPC64_TOC16_HA:
15063 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
15064 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
15065 {
15066 bfd_byte *p = contents + (rel->r_offset & ~3);
15067 bfd_put_32 (input_bfd, NOP, p);
15068 }
15069 break;
15070
15071 case R_PPC64_GOT_TLSLD16_LO:
15072 case R_PPC64_GOT_TLSGD16_LO:
15073 case R_PPC64_GOT_TPREL16_LO_DS:
15074 case R_PPC64_GOT_DTPREL16_LO_DS:
15075 case R_PPC64_GOT16_LO:
15076 case R_PPC64_GOT16_LO_DS:
15077 case R_PPC64_TOC16_LO:
15078 case R_PPC64_TOC16_LO_DS:
15079 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
15080 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
15081 {
15082 bfd_byte *p = contents + (rel->r_offset & ~3);
15083 insn = bfd_get_32 (input_bfd, p);
15084 if ((insn & (0x3f << 26)) == 12u << 26 /* addic */)
15085 {
15086 /* Transform addic to addi when we change reg. */
15087 insn &= ~((0x3f << 26) | (0x1f << 16));
15088 insn |= (14u << 26) | (2 << 16);
15089 }
15090 else
15091 {
15092 insn &= ~(0x1f << 16);
15093 insn |= 2 << 16;
15094 }
15095 bfd_put_32 (input_bfd, insn, p);
15096 }
15097 break;
15098
15099 case R_PPC64_TPREL16_HA:
15100 if (htab->do_tls_opt && relocation + addend + 0x8000 < 0x10000)
15101 {
15102 bfd_byte *p = contents + (rel->r_offset & ~3);
15103 insn = bfd_get_32 (input_bfd, p);
15104 if ((insn & ((0x3f << 26) | 0x1f << 16))
15105 != ((15u << 26) | (13 << 16)) /* addis rt,13,imm */)
15106 /* xgettext:c-format */
15107 info->callbacks->minfo
15108 (_("%H: warning: %s unexpected insn %#x.\n"),
15109 input_bfd, input_section, rel->r_offset, howto->name, insn);
15110 else
15111 bfd_put_32 (input_bfd, NOP, p);
15112 }
15113 break;
15114
15115 case R_PPC64_TPREL16_LO:
15116 case R_PPC64_TPREL16_LO_DS:
15117 if (htab->do_tls_opt && relocation + addend + 0x8000 < 0x10000)
15118 {
15119 bfd_byte *p = contents + (rel->r_offset & ~3);
15120 insn = bfd_get_32 (input_bfd, p);
15121 insn &= ~(0x1f << 16);
15122 insn |= 13 << 16;
15123 bfd_put_32 (input_bfd, insn, p);
15124 }
15125 break;
15126 }
15127
15128 /* Do any further special processing. */
15129 switch (r_type)
15130 {
15131 default:
15132 break;
15133
15134 case R_PPC64_REL16_HA:
15135 case R_PPC64_REL16DX_HA:
15136 case R_PPC64_ADDR16_HA:
15137 case R_PPC64_ADDR16_HIGHA:
15138 case R_PPC64_ADDR16_HIGHERA:
15139 case R_PPC64_ADDR16_HIGHESTA:
15140 case R_PPC64_TOC16_HA:
15141 case R_PPC64_SECTOFF_HA:
15142 case R_PPC64_TPREL16_HA:
15143 case R_PPC64_TPREL16_HIGHA:
15144 case R_PPC64_TPREL16_HIGHERA:
15145 case R_PPC64_TPREL16_HIGHESTA:
15146 case R_PPC64_DTPREL16_HA:
15147 case R_PPC64_DTPREL16_HIGHA:
15148 case R_PPC64_DTPREL16_HIGHERA:
15149 case R_PPC64_DTPREL16_HIGHESTA:
15150 /* It's just possible that this symbol is a weak symbol
15151 that's not actually defined anywhere. In that case,
15152 'sec' would be NULL, and we should leave the symbol
15153 alone (it will be set to zero elsewhere in the link). */
15154 if (sec == NULL)
15155 break;
15156 /* Fall through. */
15157
15158 case R_PPC64_GOT16_HA:
15159 case R_PPC64_PLTGOT16_HA:
15160 case R_PPC64_PLT16_HA:
15161 case R_PPC64_GOT_TLSGD16_HA:
15162 case R_PPC64_GOT_TLSLD16_HA:
15163 case R_PPC64_GOT_TPREL16_HA:
15164 case R_PPC64_GOT_DTPREL16_HA:
15165 /* Add 0x10000 if sign bit in 0:15 is set.
15166 Bits 0:15 are not used. */
15167 addend += 0x8000;
15168 break;
15169
15170 case R_PPC64_ADDR16_DS:
15171 case R_PPC64_ADDR16_LO_DS:
15172 case R_PPC64_GOT16_DS:
15173 case R_PPC64_GOT16_LO_DS:
15174 case R_PPC64_PLT16_LO_DS:
15175 case R_PPC64_SECTOFF_DS:
15176 case R_PPC64_SECTOFF_LO_DS:
15177 case R_PPC64_TOC16_DS:
15178 case R_PPC64_TOC16_LO_DS:
15179 case R_PPC64_PLTGOT16_DS:
15180 case R_PPC64_PLTGOT16_LO_DS:
15181 case R_PPC64_GOT_TPREL16_DS:
15182 case R_PPC64_GOT_TPREL16_LO_DS:
15183 case R_PPC64_GOT_DTPREL16_DS:
15184 case R_PPC64_GOT_DTPREL16_LO_DS:
15185 case R_PPC64_TPREL16_DS:
15186 case R_PPC64_TPREL16_LO_DS:
15187 case R_PPC64_DTPREL16_DS:
15188 case R_PPC64_DTPREL16_LO_DS:
15189 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
15190 mask = 3;
15191 /* If this reloc is against an lq, lxv, or stxv insn, then
15192 the value must be a multiple of 16. This is somewhat of
15193 a hack, but the "correct" way to do this by defining _DQ
15194 forms of all the _DS relocs bloats all reloc switches in
15195 this file. It doesn't make much sense to use these
15196 relocs in data, so testing the insn should be safe. */
15197 if ((insn & (0x3f << 26)) == (56u << 26)
15198 || ((insn & (0x3f << 26)) == (61u << 26) && (insn & 3) == 1))
15199 mask = 15;
15200 relocation += addend;
15201 addend = insn & (mask ^ 3);
15202 if ((relocation & mask) != 0)
15203 {
15204 relocation ^= relocation & mask;
15205 info->callbacks->einfo
15206 /* xgettext:c-format */
15207 (_("%H: error: %s not a multiple of %u\n"),
15208 input_bfd, input_section, rel->r_offset,
15209 howto->name,
15210 mask + 1);
15211 bfd_set_error (bfd_error_bad_value);
15212 ret = FALSE;
15213 goto copy_reloc;
15214 }
15215 break;
15216 }
15217
15218 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
15219 because such sections are not SEC_ALLOC and thus ld.so will
15220 not process them. */
15221 if (unresolved_reloc
15222 && !((input_section->flags & SEC_DEBUGGING) != 0
15223 && h->elf.def_dynamic)
15224 && _bfd_elf_section_offset (output_bfd, info, input_section,
15225 rel->r_offset) != (bfd_vma) -1)
15226 {
15227 info->callbacks->einfo
15228 /* xgettext:c-format */
15229 (_("%H: unresolvable %s against `%T'\n"),
15230 input_bfd, input_section, rel->r_offset,
15231 howto->name,
15232 h->elf.root.root.string);
15233 ret = FALSE;
15234 }
15235
15236 /* 16-bit fields in insns mostly have signed values, but a
15237 few insns have 16-bit unsigned values. Really, we should
15238 have different reloc types. */
15239 if (howto->complain_on_overflow != complain_overflow_dont
15240 && howto->dst_mask == 0xffff
15241 && (input_section->flags & SEC_CODE) != 0)
15242 {
15243 enum complain_overflow complain = complain_overflow_signed;
15244
15245 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
15246 if ((insn & (0x3f << 26)) == 10u << 26 /* cmpli */)
15247 complain = complain_overflow_bitfield;
15248 else if (howto->rightshift == 0
15249 ? ((insn & (0x3f << 26)) == 28u << 26 /* andi */
15250 || (insn & (0x3f << 26)) == 24u << 26 /* ori */
15251 || (insn & (0x3f << 26)) == 26u << 26 /* xori */)
15252 : ((insn & (0x3f << 26)) == 29u << 26 /* andis */
15253 || (insn & (0x3f << 26)) == 25u << 26 /* oris */
15254 || (insn & (0x3f << 26)) == 27u << 26 /* xoris */))
15255 complain = complain_overflow_unsigned;
15256 if (howto->complain_on_overflow != complain)
15257 {
15258 alt_howto = *howto;
15259 alt_howto.complain_on_overflow = complain;
15260 howto = &alt_howto;
15261 }
15262 }
15263
15264 if (r_type == R_PPC64_REL16DX_HA)
15265 {
15266 /* Split field reloc isn't handled by _bfd_final_link_relocate. */
15267 if (rel->r_offset + 4 > input_section->size)
15268 r = bfd_reloc_outofrange;
15269 else
15270 {
15271 relocation += addend;
15272 relocation -= (rel->r_offset
15273 + input_section->output_offset
15274 + input_section->output_section->vma);
15275 relocation = (bfd_signed_vma) relocation >> 16;
15276 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
15277 insn &= ~0x1fffc1;
15278 insn |= (relocation & 0xffc1) | ((relocation & 0x3e) << 15);
15279 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
15280 r = bfd_reloc_ok;
15281 if (relocation + 0x8000 > 0xffff)
15282 r = bfd_reloc_overflow;
15283 }
15284 }
15285 else
15286 r = _bfd_final_link_relocate (howto, input_bfd, input_section, contents,
15287 rel->r_offset, relocation, addend);
15288
15289 if (r != bfd_reloc_ok)
15290 {
15291 char *more_info = NULL;
15292 const char *reloc_name = howto->name;
15293
15294 if (reloc_dest != DEST_NORMAL)
15295 {
15296 more_info = bfd_malloc (strlen (reloc_name) + 8);
15297 if (more_info != NULL)
15298 {
15299 strcpy (more_info, reloc_name);
15300 strcat (more_info, (reloc_dest == DEST_OPD
15301 ? " (OPD)" : " (stub)"));
15302 reloc_name = more_info;
15303 }
15304 }
15305
15306 if (r == bfd_reloc_overflow)
15307 {
15308 /* On code like "if (foo) foo();" don't report overflow
15309 on a branch to zero when foo is undefined. */
15310 if (!warned
15311 && (reloc_dest == DEST_STUB
15312 || !(h != NULL
15313 && (h->elf.root.type == bfd_link_hash_undefweak
15314 || h->elf.root.type == bfd_link_hash_undefined)
15315 && is_branch_reloc (r_type))))
15316 info->callbacks->reloc_overflow (info, &h->elf.root,
15317 sym_name, reloc_name,
15318 orig_rel.r_addend,
15319 input_bfd, input_section,
15320 rel->r_offset);
15321 }
15322 else
15323 {
15324 info->callbacks->einfo
15325 /* xgettext:c-format */
15326 (_("%H: %s against `%T': error %d\n"),
15327 input_bfd, input_section, rel->r_offset,
15328 reloc_name, sym_name, (int) r);
15329 ret = FALSE;
15330 }
15331 if (more_info != NULL)
15332 free (more_info);
15333 }
15334 copy_reloc:
15335 if (wrel != rel)
15336 *wrel = *rel;
15337 }
15338
15339 if (wrel != rel)
15340 {
15341 Elf_Internal_Shdr *rel_hdr;
15342 size_t deleted = rel - wrel;
15343
15344 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
15345 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
15346 if (rel_hdr->sh_size == 0)
15347 {
15348 /* It is too late to remove an empty reloc section. Leave
15349 one NONE reloc.
15350 ??? What is wrong with an empty section??? */
15351 rel_hdr->sh_size = rel_hdr->sh_entsize;
15352 deleted -= 1;
15353 }
15354 rel_hdr = _bfd_elf_single_rel_hdr (input_section);
15355 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
15356 input_section->reloc_count -= deleted;
15357 }
15358
15359 /* If we're emitting relocations, then shortly after this function
15360 returns, reloc offsets and addends for this section will be
15361 adjusted. Worse, reloc symbol indices will be for the output
15362 file rather than the input. Save a copy of the relocs for
15363 opd_entry_value. */
15364 if (is_opd && (info->emitrelocations || bfd_link_relocatable (info)))
15365 {
15366 bfd_size_type amt;
15367 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
15368 rel = bfd_alloc (input_bfd, amt);
15369 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd.relocs == NULL);
15370 ppc64_elf_tdata (input_bfd)->opd.relocs = rel;
15371 if (rel == NULL)
15372 return FALSE;
15373 memcpy (rel, relocs, amt);
15374 }
15375 return ret;
15376 }
15377
15378 /* Adjust the value of any local symbols in opd sections. */
15379
15380 static int
15381 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
15382 const char *name ATTRIBUTE_UNUSED,
15383 Elf_Internal_Sym *elfsym,
15384 asection *input_sec,
15385 struct elf_link_hash_entry *h)
15386 {
15387 struct _opd_sec_data *opd;
15388 long adjust;
15389 bfd_vma value;
15390
15391 if (h != NULL)
15392 return 1;
15393
15394 opd = get_opd_info (input_sec);
15395 if (opd == NULL || opd->adjust == NULL)
15396 return 1;
15397
15398 value = elfsym->st_value - input_sec->output_offset;
15399 if (!bfd_link_relocatable (info))
15400 value -= input_sec->output_section->vma;
15401
15402 adjust = opd->adjust[OPD_NDX (value)];
15403 if (adjust == -1)
15404 return 2;
15405
15406 elfsym->st_value += adjust;
15407 return 1;
15408 }
15409
15410 /* Finish up dynamic symbol handling. We set the contents of various
15411 dynamic sections here. */
15412
15413 static bfd_boolean
15414 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
15415 struct bfd_link_info *info,
15416 struct elf_link_hash_entry *h,
15417 Elf_Internal_Sym *sym)
15418 {
15419 struct ppc_link_hash_table *htab;
15420 struct plt_entry *ent;
15421 Elf_Internal_Rela rela;
15422 bfd_byte *loc;
15423
15424 htab = ppc_hash_table (info);
15425 if (htab == NULL)
15426 return FALSE;
15427
15428 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
15429 if (ent->plt.offset != (bfd_vma) -1)
15430 {
15431 /* This symbol has an entry in the procedure linkage
15432 table. Set it up. */
15433 if (!htab->elf.dynamic_sections_created
15434 || h->dynindx == -1)
15435 {
15436 BFD_ASSERT (h->type == STT_GNU_IFUNC
15437 && h->def_regular
15438 && (h->root.type == bfd_link_hash_defined
15439 || h->root.type == bfd_link_hash_defweak));
15440 rela.r_offset = (htab->elf.iplt->output_section->vma
15441 + htab->elf.iplt->output_offset
15442 + ent->plt.offset);
15443 if (htab->opd_abi)
15444 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
15445 else
15446 rela.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
15447 rela.r_addend = (h->root.u.def.value
15448 + h->root.u.def.section->output_offset
15449 + h->root.u.def.section->output_section->vma
15450 + ent->addend);
15451 loc = (htab->elf.irelplt->contents
15452 + (htab->elf.irelplt->reloc_count++
15453 * sizeof (Elf64_External_Rela)));
15454 htab->local_ifunc_resolver = 1;
15455 }
15456 else
15457 {
15458 rela.r_offset = (htab->elf.splt->output_section->vma
15459 + htab->elf.splt->output_offset
15460 + ent->plt.offset);
15461 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
15462 rela.r_addend = ent->addend;
15463 loc = (htab->elf.srelplt->contents
15464 + ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE (htab))
15465 / PLT_ENTRY_SIZE (htab) * sizeof (Elf64_External_Rela)));
15466 if (h->type == STT_GNU_IFUNC && is_static_defined (h))
15467 htab->maybe_local_ifunc_resolver = 1;
15468 }
15469 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
15470
15471 if (!htab->opd_abi)
15472 {
15473 if (!h->def_regular)
15474 {
15475 /* Mark the symbol as undefined, rather than as
15476 defined in glink. Leave the value if there were
15477 any relocations where pointer equality matters
15478 (this is a clue for the dynamic linker, to make
15479 function pointer comparisons work between an
15480 application and shared library), otherwise set it
15481 to zero. */
15482 sym->st_shndx = SHN_UNDEF;
15483 if (!h->pointer_equality_needed)
15484 sym->st_value = 0;
15485 else if (!h->ref_regular_nonweak)
15486 {
15487 /* This breaks function pointer comparisons, but
15488 that is better than breaking tests for a NULL
15489 function pointer. */
15490 sym->st_value = 0;
15491 }
15492 }
15493 }
15494 }
15495
15496 if (h->needs_copy)
15497 {
15498 /* This symbol needs a copy reloc. Set it up. */
15499 asection *srel;
15500
15501 if (h->dynindx == -1
15502 || (h->root.type != bfd_link_hash_defined
15503 && h->root.type != bfd_link_hash_defweak)
15504 || htab->elf.srelbss == NULL
15505 || htab->elf.sreldynrelro == NULL)
15506 abort ();
15507
15508 rela.r_offset = (h->root.u.def.value
15509 + h->root.u.def.section->output_section->vma
15510 + h->root.u.def.section->output_offset);
15511 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
15512 rela.r_addend = 0;
15513 if (h->root.u.def.section == htab->elf.sdynrelro)
15514 srel = htab->elf.sreldynrelro;
15515 else
15516 srel = htab->elf.srelbss;
15517 loc = srel->contents;
15518 loc += srel->reloc_count++ * sizeof (Elf64_External_Rela);
15519 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
15520 }
15521
15522 return TRUE;
15523 }
15524
15525 /* Used to decide how to sort relocs in an optimal manner for the
15526 dynamic linker, before writing them out. */
15527
15528 static enum elf_reloc_type_class
15529 ppc64_elf_reloc_type_class (const struct bfd_link_info *info,
15530 const asection *rel_sec,
15531 const Elf_Internal_Rela *rela)
15532 {
15533 enum elf_ppc64_reloc_type r_type;
15534 struct ppc_link_hash_table *htab = ppc_hash_table (info);
15535
15536 if (rel_sec == htab->elf.irelplt)
15537 return reloc_class_ifunc;
15538
15539 r_type = ELF64_R_TYPE (rela->r_info);
15540 switch (r_type)
15541 {
15542 case R_PPC64_RELATIVE:
15543 return reloc_class_relative;
15544 case R_PPC64_JMP_SLOT:
15545 return reloc_class_plt;
15546 case R_PPC64_COPY:
15547 return reloc_class_copy;
15548 default:
15549 return reloc_class_normal;
15550 }
15551 }
15552
15553 /* Finish up the dynamic sections. */
15554
15555 static bfd_boolean
15556 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
15557 struct bfd_link_info *info)
15558 {
15559 struct ppc_link_hash_table *htab;
15560 bfd *dynobj;
15561 asection *sdyn;
15562
15563 htab = ppc_hash_table (info);
15564 if (htab == NULL)
15565 return FALSE;
15566
15567 dynobj = htab->elf.dynobj;
15568 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
15569
15570 if (htab->elf.dynamic_sections_created)
15571 {
15572 Elf64_External_Dyn *dyncon, *dynconend;
15573
15574 if (sdyn == NULL || htab->elf.sgot == NULL)
15575 abort ();
15576
15577 dyncon = (Elf64_External_Dyn *) sdyn->contents;
15578 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
15579 for (; dyncon < dynconend; dyncon++)
15580 {
15581 Elf_Internal_Dyn dyn;
15582 asection *s;
15583
15584 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
15585
15586 switch (dyn.d_tag)
15587 {
15588 default:
15589 continue;
15590
15591 case DT_PPC64_GLINK:
15592 s = htab->glink;
15593 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15594 /* We stupidly defined DT_PPC64_GLINK to be the start
15595 of glink rather than the first entry point, which is
15596 what ld.so needs, and now have a bigger stub to
15597 support automatic multiple TOCs. */
15598 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 8 * 4;
15599 break;
15600
15601 case DT_PPC64_OPD:
15602 s = bfd_get_section_by_name (output_bfd, ".opd");
15603 if (s == NULL)
15604 continue;
15605 dyn.d_un.d_ptr = s->vma;
15606 break;
15607
15608 case DT_PPC64_OPT:
15609 if (htab->do_multi_toc && htab->multi_toc_needed)
15610 dyn.d_un.d_val |= PPC64_OPT_MULTI_TOC;
15611 if (htab->has_plt_localentry0)
15612 dyn.d_un.d_val |= PPC64_OPT_LOCALENTRY;
15613 break;
15614
15615 case DT_PPC64_OPDSZ:
15616 s = bfd_get_section_by_name (output_bfd, ".opd");
15617 if (s == NULL)
15618 continue;
15619 dyn.d_un.d_val = s->size;
15620 break;
15621
15622 case DT_PLTGOT:
15623 s = htab->elf.splt;
15624 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15625 break;
15626
15627 case DT_JMPREL:
15628 s = htab->elf.srelplt;
15629 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15630 break;
15631
15632 case DT_PLTRELSZ:
15633 dyn.d_un.d_val = htab->elf.srelplt->size;
15634 break;
15635
15636 case DT_TEXTREL:
15637 if (htab->local_ifunc_resolver)
15638 info->callbacks->einfo
15639 (_("%X%P: text relocations and GNU indirect "
15640 "functions will result in a segfault at runtime\n"));
15641 else if (htab->maybe_local_ifunc_resolver)
15642 info->callbacks->einfo
15643 (_("%P: warning: text relocations and GNU indirect "
15644 "functions may result in a segfault at runtime\n"));
15645 continue;
15646 }
15647
15648 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
15649 }
15650 }
15651
15652 if (htab->elf.sgot != NULL && htab->elf.sgot->size != 0
15653 && htab->elf.sgot->output_section != bfd_abs_section_ptr)
15654 {
15655 /* Fill in the first entry in the global offset table.
15656 We use it to hold the link-time TOCbase. */
15657 bfd_put_64 (output_bfd,
15658 elf_gp (output_bfd) + TOC_BASE_OFF,
15659 htab->elf.sgot->contents);
15660
15661 /* Set .got entry size. */
15662 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 8;
15663 }
15664
15665 if (htab->elf.splt != NULL && htab->elf.splt->size != 0
15666 && htab->elf.splt->output_section != bfd_abs_section_ptr)
15667 {
15668 /* Set .plt entry size. */
15669 elf_section_data (htab->elf.splt->output_section)->this_hdr.sh_entsize
15670 = PLT_ENTRY_SIZE (htab);
15671 }
15672
15673 /* brlt is SEC_LINKER_CREATED, so we need to write out relocs for
15674 brlt ourselves if emitrelocations. */
15675 if (htab->brlt != NULL
15676 && htab->brlt->reloc_count != 0
15677 && !_bfd_elf_link_output_relocs (output_bfd,
15678 htab->brlt,
15679 elf_section_data (htab->brlt)->rela.hdr,
15680 elf_section_data (htab->brlt)->relocs,
15681 NULL))
15682 return FALSE;
15683
15684 if (htab->glink != NULL
15685 && htab->glink->reloc_count != 0
15686 && !_bfd_elf_link_output_relocs (output_bfd,
15687 htab->glink,
15688 elf_section_data (htab->glink)->rela.hdr,
15689 elf_section_data (htab->glink)->relocs,
15690 NULL))
15691 return FALSE;
15692
15693 if (htab->glink_eh_frame != NULL
15694 && htab->glink_eh_frame->size != 0)
15695 {
15696 bfd_vma val;
15697 bfd_byte *p;
15698 struct map_stub *group;
15699 size_t align = 4;
15700
15701 p = htab->glink_eh_frame->contents;
15702 p += (sizeof (glink_eh_frame_cie) + align - 1) & -align;
15703
15704 for (group = htab->group; group != NULL; group = group->next)
15705 if (group->stub_sec != NULL)
15706 {
15707 /* Offset to stub section. */
15708 val = (group->stub_sec->output_section->vma
15709 + group->stub_sec->output_offset);
15710 val -= (htab->glink_eh_frame->output_section->vma
15711 + htab->glink_eh_frame->output_offset
15712 + (p + 8 - htab->glink_eh_frame->contents));
15713 if (val + 0x80000000 > 0xffffffff)
15714 {
15715 info->callbacks->einfo
15716 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
15717 group->stub_sec->name);
15718 return FALSE;
15719 }
15720 bfd_put_32 (dynobj, val, p + 8);
15721 p += stub_eh_frame_size (group, align);
15722 }
15723 if (htab->glink != NULL && htab->glink->size != 0)
15724 {
15725 /* Offset to .glink. */
15726 val = (htab->glink->output_section->vma
15727 + htab->glink->output_offset
15728 + 8);
15729 val -= (htab->glink_eh_frame->output_section->vma
15730 + htab->glink_eh_frame->output_offset
15731 + (p + 8 - htab->glink_eh_frame->contents));
15732 if (val + 0x80000000 > 0xffffffff)
15733 {
15734 info->callbacks->einfo
15735 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
15736 htab->glink->name);
15737 return FALSE;
15738 }
15739 bfd_put_32 (dynobj, val, p + 8);
15740 p += (24 + align - 1) & -align;
15741 }
15742
15743 if (htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME
15744 && !_bfd_elf_write_section_eh_frame (output_bfd, info,
15745 htab->glink_eh_frame,
15746 htab->glink_eh_frame->contents))
15747 return FALSE;
15748 }
15749
15750 /* We need to handle writing out multiple GOT sections ourselves,
15751 since we didn't add them to DYNOBJ. We know dynobj is the first
15752 bfd. */
15753 while ((dynobj = dynobj->link.next) != NULL)
15754 {
15755 asection *s;
15756
15757 if (!is_ppc64_elf (dynobj))
15758 continue;
15759
15760 s = ppc64_elf_tdata (dynobj)->got;
15761 if (s != NULL
15762 && s->size != 0
15763 && s->output_section != bfd_abs_section_ptr
15764 && !bfd_set_section_contents (output_bfd, s->output_section,
15765 s->contents, s->output_offset,
15766 s->size))
15767 return FALSE;
15768 s = ppc64_elf_tdata (dynobj)->relgot;
15769 if (s != NULL
15770 && s->size != 0
15771 && s->output_section != bfd_abs_section_ptr
15772 && !bfd_set_section_contents (output_bfd, s->output_section,
15773 s->contents, s->output_offset,
15774 s->size))
15775 return FALSE;
15776 }
15777
15778 return TRUE;
15779 }
15780
15781 #include "elf64-target.h"
15782
15783 /* FreeBSD support */
15784
15785 #undef TARGET_LITTLE_SYM
15786 #undef TARGET_LITTLE_NAME
15787
15788 #undef TARGET_BIG_SYM
15789 #define TARGET_BIG_SYM powerpc_elf64_fbsd_vec
15790 #undef TARGET_BIG_NAME
15791 #define TARGET_BIG_NAME "elf64-powerpc-freebsd"
15792
15793 #undef ELF_OSABI
15794 #define ELF_OSABI ELFOSABI_FREEBSD
15795
15796 #undef elf64_bed
15797 #define elf64_bed elf64_powerpc_fbsd_bed
15798
15799 #include "elf64-target.h"
GDB Binutils - Deliverables
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