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PR22431, powerpc64 ld segfault when .plt discarded
[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 /* Find dynamic relocs for H that apply to read-only sections. */
7088
7089 static asection *
7090 readonly_dynrelocs (struct elf_link_hash_entry *h)
7091 {
7092 struct ppc_link_hash_entry *eh;
7093 struct elf_dyn_relocs *p;
7094
7095 eh = (struct ppc_link_hash_entry *) h;
7096 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7097 {
7098 asection *s = p->sec->output_section;
7099
7100 if (s != NULL && (s->flags & SEC_READONLY) != 0)
7101 return p->sec;
7102 }
7103 return NULL;
7104 }
7105
7106 /* Return true if we have dynamic relocs against H or any of its weak
7107 aliases, that apply to read-only sections. */
7108
7109 static bfd_boolean
7110 alias_readonly_dynrelocs (struct elf_link_hash_entry *h)
7111 {
7112 struct ppc_link_hash_entry *eh;
7113
7114 eh = (struct ppc_link_hash_entry *) h;
7115 do
7116 {
7117 if (readonly_dynrelocs (&eh->elf))
7118 return TRUE;
7119 eh = eh->weakref;
7120 } while (eh != NULL && &eh->elf != h);
7121
7122 return FALSE;
7123 }
7124
7125 /* Return whether EH has pc-relative dynamic relocs. */
7126
7127 static bfd_boolean
7128 pc_dynrelocs (struct ppc_link_hash_entry *eh)
7129 {
7130 struct elf_dyn_relocs *p;
7131
7132 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7133 if (p->pc_count != 0)
7134 return TRUE;
7135 return FALSE;
7136 }
7137
7138 /* Return true if a global entry stub will be created for H. Valid
7139 for ELFv2 before plt entries have been allocated. */
7140
7141 static bfd_boolean
7142 global_entry_stub (struct elf_link_hash_entry *h)
7143 {
7144 struct plt_entry *pent;
7145
7146 if (!h->pointer_equality_needed
7147 || h->def_regular)
7148 return FALSE;
7149
7150 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
7151 if (pent->plt.refcount > 0
7152 && pent->addend == 0)
7153 return TRUE;
7154
7155 return FALSE;
7156 }
7157
7158 /* Adjust a symbol defined by a dynamic object and referenced by a
7159 regular object. The current definition is in some section of the
7160 dynamic object, but we're not including those sections. We have to
7161 change the definition to something the rest of the link can
7162 understand. */
7163
7164 static bfd_boolean
7165 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
7166 struct elf_link_hash_entry *h)
7167 {
7168 struct ppc_link_hash_table *htab;
7169 asection *s, *srel;
7170
7171 htab = ppc_hash_table (info);
7172 if (htab == NULL)
7173 return FALSE;
7174
7175 /* Deal with function syms. */
7176 if (h->type == STT_FUNC
7177 || h->type == STT_GNU_IFUNC
7178 || h->needs_plt)
7179 {
7180 bfd_boolean local = (((struct ppc_link_hash_entry *) h)->save_res
7181 || SYMBOL_CALLS_LOCAL (info, h)
7182 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h));
7183 /* Discard dyn_relocs when non-pic if we've decided that a
7184 function symbol is local and not an ifunc. We keep dynamic
7185 relocs for ifuncs when local rather than always emitting a
7186 plt call stub for them and defining the symbol on the call
7187 stub. We can't do that for ELFv1 anyway (a function symbol
7188 is defined on a descriptor, not code) and it can be faster at
7189 run-time due to not needing to bounce through a stub. The
7190 dyn_relocs for ifuncs will be applied even in a static
7191 executable. */
7192 if (!bfd_link_pic (info)
7193 && h->type != STT_GNU_IFUNC
7194 && local)
7195 ((struct ppc_link_hash_entry *) h)->dyn_relocs = NULL;
7196
7197 /* Clear procedure linkage table information for any symbol that
7198 won't need a .plt entry. */
7199 struct plt_entry *ent;
7200 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
7201 if (ent->plt.refcount > 0)
7202 break;
7203 if (ent == NULL
7204 || (h->type != STT_GNU_IFUNC && local))
7205 {
7206 h->plt.plist = NULL;
7207 h->needs_plt = 0;
7208 h->pointer_equality_needed = 0;
7209 }
7210 else if (abiversion (info->output_bfd) >= 2)
7211 {
7212 /* Taking a function's address in a read/write section
7213 doesn't require us to define the function symbol in the
7214 executable on a global entry stub. A dynamic reloc can
7215 be used instead. The reason we prefer a few more dynamic
7216 relocs is that calling via a global entry stub costs a
7217 few more instructions, and pointer_equality_needed causes
7218 extra work in ld.so when resolving these symbols. */
7219 if (global_entry_stub (h))
7220 {
7221 if (!alias_readonly_dynrelocs (h))
7222 {
7223 h->pointer_equality_needed = 0;
7224 /* If we haven't seen a branch reloc then we don't need
7225 a plt entry. */
7226 if (!h->needs_plt)
7227 h->plt.plist = NULL;
7228 }
7229 else if (!bfd_link_pic (info))
7230 /* We are going to be defining the function symbol on the
7231 plt stub, so no dyn_relocs needed when non-pic. */
7232 ((struct ppc_link_hash_entry *) h)->dyn_relocs = NULL;
7233 }
7234
7235 /* ELFv2 function symbols can't have copy relocs. */
7236 return TRUE;
7237 }
7238 else if (!h->needs_plt
7239 && !alias_readonly_dynrelocs (h))
7240 {
7241 /* If we haven't seen a branch reloc then we don't need a
7242 plt entry. */
7243 h->plt.plist = NULL;
7244 h->pointer_equality_needed = 0;
7245 return TRUE;
7246 }
7247 }
7248 else
7249 h->plt.plist = NULL;
7250
7251 /* If this is a weak symbol, and there is a real definition, the
7252 processor independent code will have arranged for us to see the
7253 real definition first, and we can just use the same value. */
7254 if (h->u.weakdef != NULL)
7255 {
7256 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
7257 || h->u.weakdef->root.type == bfd_link_hash_defweak);
7258 h->root.u.def.section = h->u.weakdef->root.u.def.section;
7259 h->root.u.def.value = h->u.weakdef->root.u.def.value;
7260 if (ELIMINATE_COPY_RELOCS)
7261 h->non_got_ref = h->u.weakdef->non_got_ref;
7262 return TRUE;
7263 }
7264
7265 /* If we are creating a shared library, we must presume that the
7266 only references to the symbol are via the global offset table.
7267 For such cases we need not do anything here; the relocations will
7268 be handled correctly by relocate_section. */
7269 if (bfd_link_pic (info))
7270 return TRUE;
7271
7272 /* If there are no references to this symbol that do not use the
7273 GOT, we don't need to generate a copy reloc. */
7274 if (!h->non_got_ref)
7275 return TRUE;
7276
7277 /* Don't generate a copy reloc for symbols defined in the executable. */
7278 if (!h->def_dynamic || !h->ref_regular || h->def_regular
7279
7280 /* If -z nocopyreloc was given, don't generate them either. */
7281 || info->nocopyreloc
7282
7283 /* If we didn't find any dynamic relocs in read-only sections, then
7284 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
7285 || (ELIMINATE_COPY_RELOCS && !alias_readonly_dynrelocs (h))
7286
7287 /* Protected variables do not work with .dynbss. The copy in
7288 .dynbss won't be used by the shared library with the protected
7289 definition for the variable. Text relocations are preferable
7290 to an incorrect program. */
7291 || h->protected_def)
7292 return TRUE;
7293
7294 if (h->plt.plist != NULL)
7295 {
7296 /* We should never get here, but unfortunately there are versions
7297 of gcc out there that improperly (for this ABI) put initialized
7298 function pointers, vtable refs and suchlike in read-only
7299 sections. Allow them to proceed, but warn that this might
7300 break at runtime. */
7301 info->callbacks->einfo
7302 (_("%P: copy reloc against `%T' requires lazy plt linking; "
7303 "avoid setting LD_BIND_NOW=1 or upgrade gcc\n"),
7304 h->root.root.string);
7305 }
7306
7307 /* This is a reference to a symbol defined by a dynamic object which
7308 is not a function. */
7309
7310 /* We must allocate the symbol in our .dynbss section, which will
7311 become part of the .bss section of the executable. There will be
7312 an entry for this symbol in the .dynsym section. The dynamic
7313 object will contain position independent code, so all references
7314 from the dynamic object to this symbol will go through the global
7315 offset table. The dynamic linker will use the .dynsym entry to
7316 determine the address it must put in the global offset table, so
7317 both the dynamic object and the regular object will refer to the
7318 same memory location for the variable. */
7319
7320 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
7321 to copy the initial value out of the dynamic object and into the
7322 runtime process image. We need to remember the offset into the
7323 .rela.bss section we are going to use. */
7324 if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
7325 {
7326 s = htab->elf.sdynrelro;
7327 srel = htab->elf.sreldynrelro;
7328 }
7329 else
7330 {
7331 s = htab->elf.sdynbss;
7332 srel = htab->elf.srelbss;
7333 }
7334 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
7335 {
7336 srel->size += sizeof (Elf64_External_Rela);
7337 h->needs_copy = 1;
7338 }
7339
7340 /* We no longer want dyn_relocs. */
7341 ((struct ppc_link_hash_entry *) h)->dyn_relocs = NULL;
7342 return _bfd_elf_adjust_dynamic_copy (info, h, s);
7343 }
7344
7345 /* If given a function descriptor symbol, hide both the function code
7346 sym and the descriptor. */
7347 static void
7348 ppc64_elf_hide_symbol (struct bfd_link_info *info,
7349 struct elf_link_hash_entry *h,
7350 bfd_boolean force_local)
7351 {
7352 struct ppc_link_hash_entry *eh;
7353 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
7354
7355 eh = (struct ppc_link_hash_entry *) h;
7356 if (eh->is_func_descriptor)
7357 {
7358 struct ppc_link_hash_entry *fh = eh->oh;
7359
7360 if (fh == NULL)
7361 {
7362 const char *p, *q;
7363 struct elf_link_hash_table *htab = elf_hash_table (info);
7364 char save;
7365
7366 /* We aren't supposed to use alloca in BFD because on
7367 systems which do not have alloca the version in libiberty
7368 calls xmalloc, which might cause the program to crash
7369 when it runs out of memory. This function doesn't have a
7370 return status, so there's no way to gracefully return an
7371 error. So cheat. We know that string[-1] can be safely
7372 accessed; It's either a string in an ELF string table,
7373 or allocated in an objalloc structure. */
7374
7375 p = eh->elf.root.root.string - 1;
7376 save = *p;
7377 *(char *) p = '.';
7378 fh = (struct ppc_link_hash_entry *)
7379 elf_link_hash_lookup (htab, p, FALSE, FALSE, FALSE);
7380 *(char *) p = save;
7381
7382 /* Unfortunately, if it so happens that the string we were
7383 looking for was allocated immediately before this string,
7384 then we overwrote the string terminator. That's the only
7385 reason the lookup should fail. */
7386 if (fh == NULL)
7387 {
7388 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
7389 while (q >= eh->elf.root.root.string && *q == *p)
7390 --q, --p;
7391 if (q < eh->elf.root.root.string && *p == '.')
7392 fh = (struct ppc_link_hash_entry *)
7393 elf_link_hash_lookup (htab, p, FALSE, FALSE, FALSE);
7394 }
7395 if (fh != NULL)
7396 {
7397 eh->oh = fh;
7398 fh->oh = eh;
7399 }
7400 }
7401 if (fh != NULL)
7402 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
7403 }
7404 }
7405
7406 static bfd_boolean
7407 get_sym_h (struct elf_link_hash_entry **hp,
7408 Elf_Internal_Sym **symp,
7409 asection **symsecp,
7410 unsigned char **tls_maskp,
7411 Elf_Internal_Sym **locsymsp,
7412 unsigned long r_symndx,
7413 bfd *ibfd)
7414 {
7415 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
7416
7417 if (r_symndx >= symtab_hdr->sh_info)
7418 {
7419 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
7420 struct elf_link_hash_entry *h;
7421
7422 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
7423 h = elf_follow_link (h);
7424
7425 if (hp != NULL)
7426 *hp = h;
7427
7428 if (symp != NULL)
7429 *symp = NULL;
7430
7431 if (symsecp != NULL)
7432 {
7433 asection *symsec = NULL;
7434 if (h->root.type == bfd_link_hash_defined
7435 || h->root.type == bfd_link_hash_defweak)
7436 symsec = h->root.u.def.section;
7437 *symsecp = symsec;
7438 }
7439
7440 if (tls_maskp != NULL)
7441 {
7442 struct ppc_link_hash_entry *eh;
7443
7444 eh = (struct ppc_link_hash_entry *) h;
7445 *tls_maskp = &eh->tls_mask;
7446 }
7447 }
7448 else
7449 {
7450 Elf_Internal_Sym *sym;
7451 Elf_Internal_Sym *locsyms = *locsymsp;
7452
7453 if (locsyms == NULL)
7454 {
7455 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
7456 if (locsyms == NULL)
7457 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
7458 symtab_hdr->sh_info,
7459 0, NULL, NULL, NULL);
7460 if (locsyms == NULL)
7461 return FALSE;
7462 *locsymsp = locsyms;
7463 }
7464 sym = locsyms + r_symndx;
7465
7466 if (hp != NULL)
7467 *hp = NULL;
7468
7469 if (symp != NULL)
7470 *symp = sym;
7471
7472 if (symsecp != NULL)
7473 *symsecp = bfd_section_from_elf_index (ibfd, sym->st_shndx);
7474
7475 if (tls_maskp != NULL)
7476 {
7477 struct got_entry **lgot_ents;
7478 unsigned char *tls_mask;
7479
7480 tls_mask = NULL;
7481 lgot_ents = elf_local_got_ents (ibfd);
7482 if (lgot_ents != NULL)
7483 {
7484 struct plt_entry **local_plt = (struct plt_entry **)
7485 (lgot_ents + symtab_hdr->sh_info);
7486 unsigned char *lgot_masks = (unsigned char *)
7487 (local_plt + symtab_hdr->sh_info);
7488 tls_mask = &lgot_masks[r_symndx];
7489 }
7490 *tls_maskp = tls_mask;
7491 }
7492 }
7493 return TRUE;
7494 }
7495
7496 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
7497 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
7498 type suitable for optimization, and 1 otherwise. */
7499
7500 static int
7501 get_tls_mask (unsigned char **tls_maskp,
7502 unsigned long *toc_symndx,
7503 bfd_vma *toc_addend,
7504 Elf_Internal_Sym **locsymsp,
7505 const Elf_Internal_Rela *rel,
7506 bfd *ibfd)
7507 {
7508 unsigned long r_symndx;
7509 int next_r;
7510 struct elf_link_hash_entry *h;
7511 Elf_Internal_Sym *sym;
7512 asection *sec;
7513 bfd_vma off;
7514
7515 r_symndx = ELF64_R_SYM (rel->r_info);
7516 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
7517 return 0;
7518
7519 if ((*tls_maskp != NULL && **tls_maskp != 0)
7520 || sec == NULL
7521 || ppc64_elf_section_data (sec) == NULL
7522 || ppc64_elf_section_data (sec)->sec_type != sec_toc)
7523 return 1;
7524
7525 /* Look inside a TOC section too. */
7526 if (h != NULL)
7527 {
7528 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
7529 off = h->root.u.def.value;
7530 }
7531 else
7532 off = sym->st_value;
7533 off += rel->r_addend;
7534 BFD_ASSERT (off % 8 == 0);
7535 r_symndx = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8];
7536 next_r = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8 + 1];
7537 if (toc_symndx != NULL)
7538 *toc_symndx = r_symndx;
7539 if (toc_addend != NULL)
7540 *toc_addend = ppc64_elf_section_data (sec)->u.toc.add[off / 8];
7541 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
7542 return 0;
7543 if ((h == NULL || is_static_defined (h))
7544 && (next_r == -1 || next_r == -2))
7545 return 1 - next_r;
7546 return 1;
7547 }
7548
7549 /* Find (or create) an entry in the tocsave hash table. */
7550
7551 static struct tocsave_entry *
7552 tocsave_find (struct ppc_link_hash_table *htab,
7553 enum insert_option insert,
7554 Elf_Internal_Sym **local_syms,
7555 const Elf_Internal_Rela *irela,
7556 bfd *ibfd)
7557 {
7558 unsigned long r_indx;
7559 struct elf_link_hash_entry *h;
7560 Elf_Internal_Sym *sym;
7561 struct tocsave_entry ent, *p;
7562 hashval_t hash;
7563 struct tocsave_entry **slot;
7564
7565 r_indx = ELF64_R_SYM (irela->r_info);
7566 if (!get_sym_h (&h, &sym, &ent.sec, NULL, local_syms, r_indx, ibfd))
7567 return NULL;
7568 if (ent.sec == NULL || ent.sec->output_section == NULL)
7569 {
7570 _bfd_error_handler
7571 (_("%B: undefined symbol on R_PPC64_TOCSAVE relocation"), ibfd);
7572 return NULL;
7573 }
7574
7575 if (h != NULL)
7576 ent.offset = h->root.u.def.value;
7577 else
7578 ent.offset = sym->st_value;
7579 ent.offset += irela->r_addend;
7580
7581 hash = tocsave_htab_hash (&ent);
7582 slot = ((struct tocsave_entry **)
7583 htab_find_slot_with_hash (htab->tocsave_htab, &ent, hash, insert));
7584 if (slot == NULL)
7585 return NULL;
7586
7587 if (*slot == NULL)
7588 {
7589 p = (struct tocsave_entry *) bfd_alloc (ibfd, sizeof (*p));
7590 if (p == NULL)
7591 return NULL;
7592 *p = ent;
7593 *slot = p;
7594 }
7595 return *slot;
7596 }
7597
7598 /* Adjust all global syms defined in opd sections. In gcc generated
7599 code for the old ABI, these will already have been done. */
7600
7601 static bfd_boolean
7602 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
7603 {
7604 struct ppc_link_hash_entry *eh;
7605 asection *sym_sec;
7606 struct _opd_sec_data *opd;
7607
7608 if (h->root.type == bfd_link_hash_indirect)
7609 return TRUE;
7610
7611 if (h->root.type != bfd_link_hash_defined
7612 && h->root.type != bfd_link_hash_defweak)
7613 return TRUE;
7614
7615 eh = (struct ppc_link_hash_entry *) h;
7616 if (eh->adjust_done)
7617 return TRUE;
7618
7619 sym_sec = eh->elf.root.u.def.section;
7620 opd = get_opd_info (sym_sec);
7621 if (opd != NULL && opd->adjust != NULL)
7622 {
7623 long adjust = opd->adjust[OPD_NDX (eh->elf.root.u.def.value)];
7624 if (adjust == -1)
7625 {
7626 /* This entry has been deleted. */
7627 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
7628 if (dsec == NULL)
7629 {
7630 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
7631 if (discarded_section (dsec))
7632 {
7633 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
7634 break;
7635 }
7636 }
7637 eh->elf.root.u.def.value = 0;
7638 eh->elf.root.u.def.section = dsec;
7639 }
7640 else
7641 eh->elf.root.u.def.value += adjust;
7642 eh->adjust_done = 1;
7643 }
7644 return TRUE;
7645 }
7646
7647 /* Handles decrementing dynamic reloc counts for the reloc specified by
7648 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM
7649 have already been determined. */
7650
7651 static bfd_boolean
7652 dec_dynrel_count (bfd_vma r_info,
7653 asection *sec,
7654 struct bfd_link_info *info,
7655 Elf_Internal_Sym **local_syms,
7656 struct elf_link_hash_entry *h,
7657 Elf_Internal_Sym *sym)
7658 {
7659 enum elf_ppc64_reloc_type r_type;
7660 asection *sym_sec = NULL;
7661
7662 /* Can this reloc be dynamic? This switch, and later tests here
7663 should be kept in sync with the code in check_relocs. */
7664 r_type = ELF64_R_TYPE (r_info);
7665 switch (r_type)
7666 {
7667 default:
7668 return TRUE;
7669
7670 case R_PPC64_TPREL16:
7671 case R_PPC64_TPREL16_LO:
7672 case R_PPC64_TPREL16_HI:
7673 case R_PPC64_TPREL16_HA:
7674 case R_PPC64_TPREL16_DS:
7675 case R_PPC64_TPREL16_LO_DS:
7676 case R_PPC64_TPREL16_HIGH:
7677 case R_PPC64_TPREL16_HIGHA:
7678 case R_PPC64_TPREL16_HIGHER:
7679 case R_PPC64_TPREL16_HIGHERA:
7680 case R_PPC64_TPREL16_HIGHEST:
7681 case R_PPC64_TPREL16_HIGHESTA:
7682 case R_PPC64_TPREL64:
7683 case R_PPC64_DTPMOD64:
7684 case R_PPC64_DTPREL64:
7685 case R_PPC64_ADDR64:
7686 case R_PPC64_REL30:
7687 case R_PPC64_REL32:
7688 case R_PPC64_REL64:
7689 case R_PPC64_ADDR14:
7690 case R_PPC64_ADDR14_BRNTAKEN:
7691 case R_PPC64_ADDR14_BRTAKEN:
7692 case R_PPC64_ADDR16:
7693 case R_PPC64_ADDR16_DS:
7694 case R_PPC64_ADDR16_HA:
7695 case R_PPC64_ADDR16_HI:
7696 case R_PPC64_ADDR16_HIGH:
7697 case R_PPC64_ADDR16_HIGHA:
7698 case R_PPC64_ADDR16_HIGHER:
7699 case R_PPC64_ADDR16_HIGHERA:
7700 case R_PPC64_ADDR16_HIGHEST:
7701 case R_PPC64_ADDR16_HIGHESTA:
7702 case R_PPC64_ADDR16_LO:
7703 case R_PPC64_ADDR16_LO_DS:
7704 case R_PPC64_ADDR24:
7705 case R_PPC64_ADDR32:
7706 case R_PPC64_UADDR16:
7707 case R_PPC64_UADDR32:
7708 case R_PPC64_UADDR64:
7709 case R_PPC64_TOC:
7710 break;
7711 }
7712
7713 if (local_syms != NULL)
7714 {
7715 unsigned long r_symndx;
7716 bfd *ibfd = sec->owner;
7717
7718 r_symndx = ELF64_R_SYM (r_info);
7719 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
7720 return FALSE;
7721 }
7722
7723 if ((bfd_link_pic (info)
7724 && (must_be_dyn_reloc (info, r_type)
7725 || (h != NULL
7726 && (!SYMBOLIC_BIND (info, h)
7727 || h->root.type == bfd_link_hash_defweak
7728 || !h->def_regular))))
7729 || (ELIMINATE_COPY_RELOCS
7730 && !bfd_link_pic (info)
7731 && h != NULL
7732 && (h->root.type == bfd_link_hash_defweak
7733 || !h->def_regular)))
7734 ;
7735 else
7736 return TRUE;
7737
7738 if (h != NULL)
7739 {
7740 struct elf_dyn_relocs *p;
7741 struct elf_dyn_relocs **pp;
7742 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
7743
7744 /* elf_gc_sweep may have already removed all dyn relocs associated
7745 with local syms for a given section. Also, symbol flags are
7746 changed by elf_gc_sweep_symbol, confusing the test above. Don't
7747 report a dynreloc miscount. */
7748 if (*pp == NULL && info->gc_sections)
7749 return TRUE;
7750
7751 while ((p = *pp) != NULL)
7752 {
7753 if (p->sec == sec)
7754 {
7755 if (!must_be_dyn_reloc (info, r_type))
7756 p->pc_count -= 1;
7757 p->count -= 1;
7758 if (p->count == 0)
7759 *pp = p->next;
7760 return TRUE;
7761 }
7762 pp = &p->next;
7763 }
7764 }
7765 else
7766 {
7767 struct ppc_dyn_relocs *p;
7768 struct ppc_dyn_relocs **pp;
7769 void *vpp;
7770 bfd_boolean is_ifunc;
7771
7772 if (local_syms == NULL)
7773 sym_sec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
7774 if (sym_sec == NULL)
7775 sym_sec = sec;
7776
7777 vpp = &elf_section_data (sym_sec)->local_dynrel;
7778 pp = (struct ppc_dyn_relocs **) vpp;
7779
7780 if (*pp == NULL && info->gc_sections)
7781 return TRUE;
7782
7783 is_ifunc = ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC;
7784 while ((p = *pp) != NULL)
7785 {
7786 if (p->sec == sec && p->ifunc == is_ifunc)
7787 {
7788 p->count -= 1;
7789 if (p->count == 0)
7790 *pp = p->next;
7791 return TRUE;
7792 }
7793 pp = &p->next;
7794 }
7795 }
7796
7797 /* xgettext:c-format */
7798 info->callbacks->einfo (_("%P: dynreloc miscount for %B, section %A\n"),
7799 sec->owner, sec);
7800 bfd_set_error (bfd_error_bad_value);
7801 return FALSE;
7802 }
7803
7804 /* Remove unused Official Procedure Descriptor entries. Currently we
7805 only remove those associated with functions in discarded link-once
7806 sections, or weakly defined functions that have been overridden. It
7807 would be possible to remove many more entries for statically linked
7808 applications. */
7809
7810 bfd_boolean
7811 ppc64_elf_edit_opd (struct bfd_link_info *info)
7812 {
7813 bfd *ibfd;
7814 bfd_boolean some_edited = FALSE;
7815 asection *need_pad = NULL;
7816 struct ppc_link_hash_table *htab;
7817
7818 htab = ppc_hash_table (info);
7819 if (htab == NULL)
7820 return FALSE;
7821
7822 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
7823 {
7824 asection *sec;
7825 Elf_Internal_Rela *relstart, *rel, *relend;
7826 Elf_Internal_Shdr *symtab_hdr;
7827 Elf_Internal_Sym *local_syms;
7828 struct _opd_sec_data *opd;
7829 bfd_boolean need_edit, add_aux_fields, broken;
7830 bfd_size_type cnt_16b = 0;
7831
7832 if (!is_ppc64_elf (ibfd))
7833 continue;
7834
7835 sec = bfd_get_section_by_name (ibfd, ".opd");
7836 if (sec == NULL || sec->size == 0)
7837 continue;
7838
7839 if (sec->sec_info_type == SEC_INFO_TYPE_JUST_SYMS)
7840 continue;
7841
7842 if (sec->output_section == bfd_abs_section_ptr)
7843 continue;
7844
7845 /* Look through the section relocs. */
7846 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
7847 continue;
7848
7849 local_syms = NULL;
7850 symtab_hdr = &elf_symtab_hdr (ibfd);
7851
7852 /* Read the relocations. */
7853 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7854 info->keep_memory);
7855 if (relstart == NULL)
7856 return FALSE;
7857
7858 /* First run through the relocs to check they are sane, and to
7859 determine whether we need to edit this opd section. */
7860 need_edit = FALSE;
7861 broken = FALSE;
7862 need_pad = sec;
7863 relend = relstart + sec->reloc_count;
7864 for (rel = relstart; rel < relend; )
7865 {
7866 enum elf_ppc64_reloc_type r_type;
7867 unsigned long r_symndx;
7868 asection *sym_sec;
7869 struct elf_link_hash_entry *h;
7870 Elf_Internal_Sym *sym;
7871 bfd_vma offset;
7872
7873 /* .opd contains an array of 16 or 24 byte entries. We're
7874 only interested in the reloc pointing to a function entry
7875 point. */
7876 offset = rel->r_offset;
7877 if (rel + 1 == relend
7878 || rel[1].r_offset != offset + 8)
7879 {
7880 /* If someone messes with .opd alignment then after a
7881 "ld -r" we might have padding in the middle of .opd.
7882 Also, there's nothing to prevent someone putting
7883 something silly in .opd with the assembler. No .opd
7884 optimization for them! */
7885 broken_opd:
7886 _bfd_error_handler
7887 (_("%B: .opd is not a regular array of opd entries"), ibfd);
7888 broken = TRUE;
7889 break;
7890 }
7891
7892 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
7893 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
7894 {
7895 _bfd_error_handler
7896 /* xgettext:c-format */
7897 (_("%B: unexpected reloc type %u in .opd section"),
7898 ibfd, r_type);
7899 broken = TRUE;
7900 break;
7901 }
7902
7903 r_symndx = ELF64_R_SYM (rel->r_info);
7904 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7905 r_symndx, ibfd))
7906 goto error_ret;
7907
7908 if (sym_sec == NULL || sym_sec->owner == NULL)
7909 {
7910 const char *sym_name;
7911 if (h != NULL)
7912 sym_name = h->root.root.string;
7913 else
7914 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
7915 sym_sec);
7916
7917 _bfd_error_handler
7918 /* xgettext:c-format */
7919 (_("%B: undefined sym `%s' in .opd section"),
7920 ibfd, sym_name);
7921 broken = TRUE;
7922 break;
7923 }
7924
7925 /* opd entries are always for functions defined in the
7926 current input bfd. If the symbol isn't defined in the
7927 input bfd, then we won't be using the function in this
7928 bfd; It must be defined in a linkonce section in another
7929 bfd, or is weak. It's also possible that we are
7930 discarding the function due to a linker script /DISCARD/,
7931 which we test for via the output_section. */
7932 if (sym_sec->owner != ibfd
7933 || sym_sec->output_section == bfd_abs_section_ptr)
7934 need_edit = TRUE;
7935
7936 rel += 2;
7937 if (rel + 1 == relend
7938 || (rel + 2 < relend
7939 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC))
7940 ++rel;
7941
7942 if (rel == relend)
7943 {
7944 if (sec->size == offset + 24)
7945 {
7946 need_pad = NULL;
7947 break;
7948 }
7949 if (sec->size == offset + 16)
7950 {
7951 cnt_16b++;
7952 break;
7953 }
7954 goto broken_opd;
7955 }
7956 else if (rel + 1 < relend
7957 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
7958 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
7959 {
7960 if (rel[0].r_offset == offset + 16)
7961 cnt_16b++;
7962 else if (rel[0].r_offset != offset + 24)
7963 goto broken_opd;
7964 }
7965 else
7966 goto broken_opd;
7967 }
7968
7969 add_aux_fields = htab->params->non_overlapping_opd && cnt_16b > 0;
7970
7971 if (!broken && (need_edit || add_aux_fields))
7972 {
7973 Elf_Internal_Rela *write_rel;
7974 Elf_Internal_Shdr *rel_hdr;
7975 bfd_byte *rptr, *wptr;
7976 bfd_byte *new_contents;
7977 bfd_size_type amt;
7978
7979 new_contents = NULL;
7980 amt = OPD_NDX (sec->size) * sizeof (long);
7981 opd = &ppc64_elf_section_data (sec)->u.opd;
7982 opd->adjust = bfd_zalloc (sec->owner, amt);
7983 if (opd->adjust == NULL)
7984 return FALSE;
7985
7986 /* This seems a waste of time as input .opd sections are all
7987 zeros as generated by gcc, but I suppose there's no reason
7988 this will always be so. We might start putting something in
7989 the third word of .opd entries. */
7990 if ((sec->flags & SEC_IN_MEMORY) == 0)
7991 {
7992 bfd_byte *loc;
7993 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
7994 {
7995 if (loc != NULL)
7996 free (loc);
7997 error_ret:
7998 if (local_syms != NULL
7999 && symtab_hdr->contents != (unsigned char *) local_syms)
8000 free (local_syms);
8001 if (elf_section_data (sec)->relocs != relstart)
8002 free (relstart);
8003 return FALSE;
8004 }
8005 sec->contents = loc;
8006 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
8007 }
8008
8009 elf_section_data (sec)->relocs = relstart;
8010
8011 new_contents = sec->contents;
8012 if (add_aux_fields)
8013 {
8014 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
8015 if (new_contents == NULL)
8016 return FALSE;
8017 need_pad = NULL;
8018 }
8019 wptr = new_contents;
8020 rptr = sec->contents;
8021 write_rel = relstart;
8022 for (rel = relstart; rel < relend; )
8023 {
8024 unsigned long r_symndx;
8025 asection *sym_sec;
8026 struct elf_link_hash_entry *h;
8027 struct ppc_link_hash_entry *fdh = NULL;
8028 Elf_Internal_Sym *sym;
8029 long opd_ent_size;
8030 Elf_Internal_Rela *next_rel;
8031 bfd_boolean skip;
8032
8033 r_symndx = ELF64_R_SYM (rel->r_info);
8034 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8035 r_symndx, ibfd))
8036 goto error_ret;
8037
8038 next_rel = rel + 2;
8039 if (next_rel + 1 == relend
8040 || (next_rel + 2 < relend
8041 && ELF64_R_TYPE (next_rel[2].r_info) == R_PPC64_TOC))
8042 ++next_rel;
8043
8044 /* See if the .opd entry is full 24 byte or
8045 16 byte (with fd_aux entry overlapped with next
8046 fd_func). */
8047 opd_ent_size = 24;
8048 if (next_rel == relend)
8049 {
8050 if (sec->size == rel->r_offset + 16)
8051 opd_ent_size = 16;
8052 }
8053 else if (next_rel->r_offset == rel->r_offset + 16)
8054 opd_ent_size = 16;
8055
8056 if (h != NULL
8057 && h->root.root.string[0] == '.')
8058 {
8059 fdh = ((struct ppc_link_hash_entry *) h)->oh;
8060 if (fdh != NULL)
8061 {
8062 fdh = ppc_follow_link (fdh);
8063 if (fdh->elf.root.type != bfd_link_hash_defined
8064 && fdh->elf.root.type != bfd_link_hash_defweak)
8065 fdh = NULL;
8066 }
8067 }
8068
8069 skip = (sym_sec->owner != ibfd
8070 || sym_sec->output_section == bfd_abs_section_ptr);
8071 if (skip)
8072 {
8073 if (fdh != NULL && sym_sec->owner == ibfd)
8074 {
8075 /* Arrange for the function descriptor sym
8076 to be dropped. */
8077 fdh->elf.root.u.def.value = 0;
8078 fdh->elf.root.u.def.section = sym_sec;
8079 }
8080 opd->adjust[OPD_NDX (rel->r_offset)] = -1;
8081
8082 if (NO_OPD_RELOCS || bfd_link_relocatable (info))
8083 rel = next_rel;
8084 else
8085 while (1)
8086 {
8087 if (!dec_dynrel_count (rel->r_info, sec, info,
8088 NULL, h, sym))
8089 goto error_ret;
8090
8091 if (++rel == next_rel)
8092 break;
8093
8094 r_symndx = ELF64_R_SYM (rel->r_info);
8095 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8096 r_symndx, ibfd))
8097 goto error_ret;
8098 }
8099 }
8100 else
8101 {
8102 /* We'll be keeping this opd entry. */
8103 long adjust;
8104
8105 if (fdh != NULL)
8106 {
8107 /* Redefine the function descriptor symbol to
8108 this location in the opd section. It is
8109 necessary to update the value here rather
8110 than using an array of adjustments as we do
8111 for local symbols, because various places
8112 in the generic ELF code use the value
8113 stored in u.def.value. */
8114 fdh->elf.root.u.def.value = wptr - new_contents;
8115 fdh->adjust_done = 1;
8116 }
8117
8118 /* Local syms are a bit tricky. We could
8119 tweak them as they can be cached, but
8120 we'd need to look through the local syms
8121 for the function descriptor sym which we
8122 don't have at the moment. So keep an
8123 array of adjustments. */
8124 adjust = (wptr - new_contents) - (rptr - sec->contents);
8125 opd->adjust[OPD_NDX (rel->r_offset)] = adjust;
8126
8127 if (wptr != rptr)
8128 memcpy (wptr, rptr, opd_ent_size);
8129 wptr += opd_ent_size;
8130 if (add_aux_fields && opd_ent_size == 16)
8131 {
8132 memset (wptr, '\0', 8);
8133 wptr += 8;
8134 }
8135
8136 /* We need to adjust any reloc offsets to point to the
8137 new opd entries. */
8138 for ( ; rel != next_rel; ++rel)
8139 {
8140 rel->r_offset += adjust;
8141 if (write_rel != rel)
8142 memcpy (write_rel, rel, sizeof (*rel));
8143 ++write_rel;
8144 }
8145 }
8146
8147 rptr += opd_ent_size;
8148 }
8149
8150 sec->size = wptr - new_contents;
8151 sec->reloc_count = write_rel - relstart;
8152 if (add_aux_fields)
8153 {
8154 free (sec->contents);
8155 sec->contents = new_contents;
8156 }
8157
8158 /* Fudge the header size too, as this is used later in
8159 elf_bfd_final_link if we are emitting relocs. */
8160 rel_hdr = _bfd_elf_single_rel_hdr (sec);
8161 rel_hdr->sh_size = sec->reloc_count * rel_hdr->sh_entsize;
8162 some_edited = TRUE;
8163 }
8164 else if (elf_section_data (sec)->relocs != relstart)
8165 free (relstart);
8166
8167 if (local_syms != NULL
8168 && symtab_hdr->contents != (unsigned char *) local_syms)
8169 {
8170 if (!info->keep_memory)
8171 free (local_syms);
8172 else
8173 symtab_hdr->contents = (unsigned char *) local_syms;
8174 }
8175 }
8176
8177 if (some_edited)
8178 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
8179
8180 /* If we are doing a final link and the last .opd entry is just 16 byte
8181 long, add a 8 byte padding after it. */
8182 if (need_pad != NULL && !bfd_link_relocatable (info))
8183 {
8184 bfd_byte *p;
8185
8186 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
8187 {
8188 BFD_ASSERT (need_pad->size > 0);
8189
8190 p = bfd_malloc (need_pad->size + 8);
8191 if (p == NULL)
8192 return FALSE;
8193
8194 if (! bfd_get_section_contents (need_pad->owner, need_pad,
8195 p, 0, need_pad->size))
8196 return FALSE;
8197
8198 need_pad->contents = p;
8199 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
8200 }
8201 else
8202 {
8203 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
8204 if (p == NULL)
8205 return FALSE;
8206
8207 need_pad->contents = p;
8208 }
8209
8210 memset (need_pad->contents + need_pad->size, 0, 8);
8211 need_pad->size += 8;
8212 }
8213
8214 return TRUE;
8215 }
8216
8217 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
8218
8219 asection *
8220 ppc64_elf_tls_setup (struct bfd_link_info *info)
8221 {
8222 struct ppc_link_hash_table *htab;
8223
8224 htab = ppc_hash_table (info);
8225 if (htab == NULL)
8226 return NULL;
8227
8228 if (abiversion (info->output_bfd) == 1)
8229 htab->opd_abi = 1;
8230
8231 if (htab->params->no_multi_toc)
8232 htab->do_multi_toc = 0;
8233 else if (!htab->do_multi_toc)
8234 htab->params->no_multi_toc = 1;
8235
8236 /* Default to --no-plt-localentry, as this option can cause problems
8237 with symbol interposition. For example, glibc libpthread.so and
8238 libc.so duplicate many pthread symbols, with a fallback
8239 implementation in libc.so. In some cases the fallback does more
8240 work than the pthread implementation. __pthread_condattr_destroy
8241 is one such symbol: the libpthread.so implementation is
8242 localentry:0 while the libc.so implementation is localentry:8.
8243 An app that "cleverly" uses dlopen to only load necessary
8244 libraries at runtime may omit loading libpthread.so when not
8245 running multi-threaded, which then results in the libc.so
8246 fallback symbols being used and ld.so complaining. Now there
8247 are workarounds in ld (see non_zero_localentry) to detect the
8248 pthread situation, but that may not be the only case where
8249 --plt-localentry can cause trouble. */
8250 if (htab->params->plt_localentry0 < 0)
8251 htab->params->plt_localentry0 = 0;
8252 if (htab->params->plt_localentry0
8253 && elf_link_hash_lookup (&htab->elf, "GLIBC_2.26",
8254 FALSE, FALSE, FALSE) == NULL)
8255 info->callbacks->einfo
8256 (_("%P: warning: --plt-localentry is especially dangerous without "
8257 "ld.so support to detect ABI violations.\n"));
8258
8259 htab->tls_get_addr = ((struct ppc_link_hash_entry *)
8260 elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
8261 FALSE, FALSE, TRUE));
8262 /* Move dynamic linking info to the function descriptor sym. */
8263 if (htab->tls_get_addr != NULL)
8264 func_desc_adjust (&htab->tls_get_addr->elf, info);
8265 htab->tls_get_addr_fd = ((struct ppc_link_hash_entry *)
8266 elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
8267 FALSE, FALSE, TRUE));
8268 if (htab->params->tls_get_addr_opt)
8269 {
8270 struct elf_link_hash_entry *opt, *opt_fd, *tga, *tga_fd;
8271
8272 opt = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr_opt",
8273 FALSE, FALSE, TRUE);
8274 if (opt != NULL)
8275 func_desc_adjust (opt, info);
8276 opt_fd = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
8277 FALSE, FALSE, TRUE);
8278 if (opt_fd != NULL
8279 && (opt_fd->root.type == bfd_link_hash_defined
8280 || opt_fd->root.type == bfd_link_hash_defweak))
8281 {
8282 /* If glibc supports an optimized __tls_get_addr call stub,
8283 signalled by the presence of __tls_get_addr_opt, and we'll
8284 be calling __tls_get_addr via a plt call stub, then
8285 make __tls_get_addr point to __tls_get_addr_opt. */
8286 tga_fd = &htab->tls_get_addr_fd->elf;
8287 if (htab->elf.dynamic_sections_created
8288 && tga_fd != NULL
8289 && (tga_fd->type == STT_FUNC
8290 || tga_fd->needs_plt)
8291 && !(SYMBOL_CALLS_LOCAL (info, tga_fd)
8292 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, tga_fd)))
8293 {
8294 struct plt_entry *ent;
8295
8296 for (ent = tga_fd->plt.plist; ent != NULL; ent = ent->next)
8297 if (ent->plt.refcount > 0)
8298 break;
8299 if (ent != NULL)
8300 {
8301 tga_fd->root.type = bfd_link_hash_indirect;
8302 tga_fd->root.u.i.link = &opt_fd->root;
8303 ppc64_elf_copy_indirect_symbol (info, opt_fd, tga_fd);
8304 opt_fd->mark = 1;
8305 if (opt_fd->dynindx != -1)
8306 {
8307 /* Use __tls_get_addr_opt in dynamic relocations. */
8308 opt_fd->dynindx = -1;
8309 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
8310 opt_fd->dynstr_index);
8311 if (!bfd_elf_link_record_dynamic_symbol (info, opt_fd))
8312 return NULL;
8313 }
8314 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) opt_fd;
8315 tga = &htab->tls_get_addr->elf;
8316 if (opt != NULL && tga != NULL)
8317 {
8318 tga->root.type = bfd_link_hash_indirect;
8319 tga->root.u.i.link = &opt->root;
8320 ppc64_elf_copy_indirect_symbol (info, opt, tga);
8321 opt->mark = 1;
8322 _bfd_elf_link_hash_hide_symbol (info, opt,
8323 tga->forced_local);
8324 htab->tls_get_addr = (struct ppc_link_hash_entry *) opt;
8325 }
8326 htab->tls_get_addr_fd->oh = htab->tls_get_addr;
8327 htab->tls_get_addr_fd->is_func_descriptor = 1;
8328 if (htab->tls_get_addr != NULL)
8329 {
8330 htab->tls_get_addr->oh = htab->tls_get_addr_fd;
8331 htab->tls_get_addr->is_func = 1;
8332 }
8333 }
8334 }
8335 }
8336 else if (htab->params->tls_get_addr_opt < 0)
8337 htab->params->tls_get_addr_opt = 0;
8338 }
8339 return _bfd_elf_tls_setup (info->output_bfd, info);
8340 }
8341
8342 /* Return TRUE iff REL is a branch reloc with a global symbol matching
8343 HASH1 or HASH2. */
8344
8345 static bfd_boolean
8346 branch_reloc_hash_match (const bfd *ibfd,
8347 const Elf_Internal_Rela *rel,
8348 const struct ppc_link_hash_entry *hash1,
8349 const struct ppc_link_hash_entry *hash2)
8350 {
8351 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
8352 enum elf_ppc64_reloc_type r_type = ELF64_R_TYPE (rel->r_info);
8353 unsigned int r_symndx = ELF64_R_SYM (rel->r_info);
8354
8355 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
8356 {
8357 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
8358 struct elf_link_hash_entry *h;
8359
8360 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
8361 h = elf_follow_link (h);
8362 if (h == &hash1->elf || h == &hash2->elf)
8363 return TRUE;
8364 }
8365 return FALSE;
8366 }
8367
8368 /* Run through all the TLS relocs looking for optimization
8369 opportunities. The linker has been hacked (see ppc64elf.em) to do
8370 a preliminary section layout so that we know the TLS segment
8371 offsets. We can't optimize earlier because some optimizations need
8372 to know the tp offset, and we need to optimize before allocating
8373 dynamic relocations. */
8374
8375 bfd_boolean
8376 ppc64_elf_tls_optimize (struct bfd_link_info *info)
8377 {
8378 bfd *ibfd;
8379 asection *sec;
8380 struct ppc_link_hash_table *htab;
8381 unsigned char *toc_ref;
8382 int pass;
8383
8384 if (!bfd_link_executable (info))
8385 return TRUE;
8386
8387 htab = ppc_hash_table (info);
8388 if (htab == NULL)
8389 return FALSE;
8390
8391 /* Make two passes over the relocs. On the first pass, mark toc
8392 entries involved with tls relocs, and check that tls relocs
8393 involved in setting up a tls_get_addr call are indeed followed by
8394 such a call. If they are not, we can't do any tls optimization.
8395 On the second pass twiddle tls_mask flags to notify
8396 relocate_section that optimization can be done, and adjust got
8397 and plt refcounts. */
8398 toc_ref = NULL;
8399 for (pass = 0; pass < 2; ++pass)
8400 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
8401 {
8402 Elf_Internal_Sym *locsyms = NULL;
8403 asection *toc = bfd_get_section_by_name (ibfd, ".toc");
8404
8405 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8406 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
8407 {
8408 Elf_Internal_Rela *relstart, *rel, *relend;
8409 bfd_boolean found_tls_get_addr_arg = 0;
8410
8411 /* Read the relocations. */
8412 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8413 info->keep_memory);
8414 if (relstart == NULL)
8415 {
8416 free (toc_ref);
8417 return FALSE;
8418 }
8419
8420 relend = relstart + sec->reloc_count;
8421 for (rel = relstart; rel < relend; rel++)
8422 {
8423 enum elf_ppc64_reloc_type r_type;
8424 unsigned long r_symndx;
8425 struct elf_link_hash_entry *h;
8426 Elf_Internal_Sym *sym;
8427 asection *sym_sec;
8428 unsigned char *tls_mask;
8429 unsigned char tls_set, tls_clear, tls_type = 0;
8430 bfd_vma value;
8431 bfd_boolean ok_tprel, is_local;
8432 long toc_ref_index = 0;
8433 int expecting_tls_get_addr = 0;
8434 bfd_boolean ret = FALSE;
8435
8436 r_symndx = ELF64_R_SYM (rel->r_info);
8437 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
8438 r_symndx, ibfd))
8439 {
8440 err_free_rel:
8441 if (elf_section_data (sec)->relocs != relstart)
8442 free (relstart);
8443 if (toc_ref != NULL)
8444 free (toc_ref);
8445 if (locsyms != NULL
8446 && (elf_symtab_hdr (ibfd).contents
8447 != (unsigned char *) locsyms))
8448 free (locsyms);
8449 return ret;
8450 }
8451
8452 if (h != NULL)
8453 {
8454 if (h->root.type == bfd_link_hash_defined
8455 || h->root.type == bfd_link_hash_defweak)
8456 value = h->root.u.def.value;
8457 else if (h->root.type == bfd_link_hash_undefweak)
8458 value = 0;
8459 else
8460 {
8461 found_tls_get_addr_arg = 0;
8462 continue;
8463 }
8464 }
8465 else
8466 /* Symbols referenced by TLS relocs must be of type
8467 STT_TLS. So no need for .opd local sym adjust. */
8468 value = sym->st_value;
8469
8470 ok_tprel = FALSE;
8471 is_local = FALSE;
8472 if (h == NULL
8473 || !h->def_dynamic)
8474 {
8475 is_local = TRUE;
8476 if (h != NULL
8477 && h->root.type == bfd_link_hash_undefweak)
8478 ok_tprel = TRUE;
8479 else if (sym_sec != NULL
8480 && sym_sec->output_section != NULL)
8481 {
8482 value += sym_sec->output_offset;
8483 value += sym_sec->output_section->vma;
8484 value -= htab->elf.tls_sec->vma;
8485 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
8486 < (bfd_vma) 1 << 32);
8487 }
8488 }
8489
8490 r_type = ELF64_R_TYPE (rel->r_info);
8491 /* If this section has old-style __tls_get_addr calls
8492 without marker relocs, then check that each
8493 __tls_get_addr call reloc is preceded by a reloc
8494 that conceivably belongs to the __tls_get_addr arg
8495 setup insn. If we don't find matching arg setup
8496 relocs, don't do any tls optimization. */
8497 if (pass == 0
8498 && sec->has_tls_get_addr_call
8499 && h != NULL
8500 && (h == &htab->tls_get_addr->elf
8501 || h == &htab->tls_get_addr_fd->elf)
8502 && !found_tls_get_addr_arg
8503 && is_branch_reloc (r_type))
8504 {
8505 info->callbacks->minfo (_("%H __tls_get_addr lost arg, "
8506 "TLS optimization disabled\n"),
8507 ibfd, sec, rel->r_offset);
8508 ret = TRUE;
8509 goto err_free_rel;
8510 }
8511
8512 found_tls_get_addr_arg = 0;
8513 switch (r_type)
8514 {
8515 case R_PPC64_GOT_TLSLD16:
8516 case R_PPC64_GOT_TLSLD16_LO:
8517 expecting_tls_get_addr = 1;
8518 found_tls_get_addr_arg = 1;
8519 /* Fall through. */
8520
8521 case R_PPC64_GOT_TLSLD16_HI:
8522 case R_PPC64_GOT_TLSLD16_HA:
8523 /* These relocs should never be against a symbol
8524 defined in a shared lib. Leave them alone if
8525 that turns out to be the case. */
8526 if (!is_local)
8527 continue;
8528
8529 /* LD -> LE */
8530 tls_set = 0;
8531 tls_clear = TLS_LD;
8532 tls_type = TLS_TLS | TLS_LD;
8533 break;
8534
8535 case R_PPC64_GOT_TLSGD16:
8536 case R_PPC64_GOT_TLSGD16_LO:
8537 expecting_tls_get_addr = 1;
8538 found_tls_get_addr_arg = 1;
8539 /* Fall through. */
8540
8541 case R_PPC64_GOT_TLSGD16_HI:
8542 case R_PPC64_GOT_TLSGD16_HA:
8543 if (ok_tprel)
8544 /* GD -> LE */
8545 tls_set = 0;
8546 else
8547 /* GD -> IE */
8548 tls_set = TLS_TLS | TLS_TPRELGD;
8549 tls_clear = TLS_GD;
8550 tls_type = TLS_TLS | TLS_GD;
8551 break;
8552
8553 case R_PPC64_GOT_TPREL16_DS:
8554 case R_PPC64_GOT_TPREL16_LO_DS:
8555 case R_PPC64_GOT_TPREL16_HI:
8556 case R_PPC64_GOT_TPREL16_HA:
8557 if (ok_tprel)
8558 {
8559 /* IE -> LE */
8560 tls_set = 0;
8561 tls_clear = TLS_TPREL;
8562 tls_type = TLS_TLS | TLS_TPREL;
8563 break;
8564 }
8565 continue;
8566
8567 case R_PPC64_TLSGD:
8568 case R_PPC64_TLSLD:
8569 found_tls_get_addr_arg = 1;
8570 /* Fall through. */
8571
8572 case R_PPC64_TLS:
8573 case R_PPC64_TOC16:
8574 case R_PPC64_TOC16_LO:
8575 if (sym_sec == NULL || sym_sec != toc)
8576 continue;
8577
8578 /* Mark this toc entry as referenced by a TLS
8579 code sequence. We can do that now in the
8580 case of R_PPC64_TLS, and after checking for
8581 tls_get_addr for the TOC16 relocs. */
8582 if (toc_ref == NULL)
8583 toc_ref = bfd_zmalloc (toc->output_section->rawsize / 8);
8584 if (toc_ref == NULL)
8585 goto err_free_rel;
8586
8587 if (h != NULL)
8588 value = h->root.u.def.value;
8589 else
8590 value = sym->st_value;
8591 value += rel->r_addend;
8592 if (value % 8 != 0)
8593 continue;
8594 BFD_ASSERT (value < toc->size
8595 && toc->output_offset % 8 == 0);
8596 toc_ref_index = (value + toc->output_offset) / 8;
8597 if (r_type == R_PPC64_TLS
8598 || r_type == R_PPC64_TLSGD
8599 || r_type == R_PPC64_TLSLD)
8600 {
8601 toc_ref[toc_ref_index] = 1;
8602 continue;
8603 }
8604
8605 if (pass != 0 && toc_ref[toc_ref_index] == 0)
8606 continue;
8607
8608 tls_set = 0;
8609 tls_clear = 0;
8610 expecting_tls_get_addr = 2;
8611 break;
8612
8613 case R_PPC64_TPREL64:
8614 if (pass == 0
8615 || sec != toc
8616 || toc_ref == NULL
8617 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
8618 continue;
8619 if (ok_tprel)
8620 {
8621 /* IE -> LE */
8622 tls_set = TLS_EXPLICIT;
8623 tls_clear = TLS_TPREL;
8624 break;
8625 }
8626 continue;
8627
8628 case R_PPC64_DTPMOD64:
8629 if (pass == 0
8630 || sec != toc
8631 || toc_ref == NULL
8632 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
8633 continue;
8634 if (rel + 1 < relend
8635 && (rel[1].r_info
8636 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
8637 && rel[1].r_offset == rel->r_offset + 8)
8638 {
8639 if (ok_tprel)
8640 /* GD -> LE */
8641 tls_set = TLS_EXPLICIT | TLS_GD;
8642 else
8643 /* GD -> IE */
8644 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
8645 tls_clear = TLS_GD;
8646 }
8647 else
8648 {
8649 if (!is_local)
8650 continue;
8651
8652 /* LD -> LE */
8653 tls_set = TLS_EXPLICIT;
8654 tls_clear = TLS_LD;
8655 }
8656 break;
8657
8658 default:
8659 continue;
8660 }
8661
8662 if (pass == 0)
8663 {
8664 if (!expecting_tls_get_addr
8665 || !sec->has_tls_get_addr_call)
8666 continue;
8667
8668 if (rel + 1 < relend
8669 && branch_reloc_hash_match (ibfd, rel + 1,
8670 htab->tls_get_addr,
8671 htab->tls_get_addr_fd))
8672 {
8673 if (expecting_tls_get_addr == 2)
8674 {
8675 /* Check for toc tls entries. */
8676 unsigned char *toc_tls;
8677 int retval;
8678
8679 retval = get_tls_mask (&toc_tls, NULL, NULL,
8680 &locsyms,
8681 rel, ibfd);
8682 if (retval == 0)
8683 goto err_free_rel;
8684 if (toc_tls != NULL)
8685 {
8686 if ((*toc_tls & (TLS_GD | TLS_LD)) != 0)
8687 found_tls_get_addr_arg = 1;
8688 if (retval > 1)
8689 toc_ref[toc_ref_index] = 1;
8690 }
8691 }
8692 continue;
8693 }
8694
8695 if (expecting_tls_get_addr != 1)
8696 continue;
8697
8698 /* Uh oh, we didn't find the expected call. We
8699 could just mark this symbol to exclude it
8700 from tls optimization but it's safer to skip
8701 the entire optimization. */
8702 /* xgettext:c-format */
8703 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
8704 "TLS optimization disabled\n"),
8705 ibfd, sec, rel->r_offset);
8706 ret = TRUE;
8707 goto err_free_rel;
8708 }
8709
8710 if (expecting_tls_get_addr && htab->tls_get_addr != NULL)
8711 {
8712 struct plt_entry *ent;
8713 for (ent = htab->tls_get_addr->elf.plt.plist;
8714 ent != NULL;
8715 ent = ent->next)
8716 if (ent->addend == 0)
8717 {
8718 if (ent->plt.refcount > 0)
8719 {
8720 ent->plt.refcount -= 1;
8721 expecting_tls_get_addr = 0;
8722 }
8723 break;
8724 }
8725 }
8726
8727 if (expecting_tls_get_addr && htab->tls_get_addr_fd != NULL)
8728 {
8729 struct plt_entry *ent;
8730 for (ent = htab->tls_get_addr_fd->elf.plt.plist;
8731 ent != NULL;
8732 ent = ent->next)
8733 if (ent->addend == 0)
8734 {
8735 if (ent->plt.refcount > 0)
8736 ent->plt.refcount -= 1;
8737 break;
8738 }
8739 }
8740
8741 if (tls_clear == 0)
8742 continue;
8743
8744 if ((tls_set & TLS_EXPLICIT) == 0)
8745 {
8746 struct got_entry *ent;
8747
8748 /* Adjust got entry for this reloc. */
8749 if (h != NULL)
8750 ent = h->got.glist;
8751 else
8752 ent = elf_local_got_ents (ibfd)[r_symndx];
8753
8754 for (; ent != NULL; ent = ent->next)
8755 if (ent->addend == rel->r_addend
8756 && ent->owner == ibfd
8757 && ent->tls_type == tls_type)
8758 break;
8759 if (ent == NULL)
8760 abort ();
8761
8762 if (tls_set == 0)
8763 {
8764 /* We managed to get rid of a got entry. */
8765 if (ent->got.refcount > 0)
8766 ent->got.refcount -= 1;
8767 }
8768 }
8769 else
8770 {
8771 /* If we got rid of a DTPMOD/DTPREL reloc pair then
8772 we'll lose one or two dyn relocs. */
8773 if (!dec_dynrel_count (rel->r_info, sec, info,
8774 NULL, h, sym))
8775 return FALSE;
8776
8777 if (tls_set == (TLS_EXPLICIT | TLS_GD))
8778 {
8779 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
8780 NULL, h, sym))
8781 return FALSE;
8782 }
8783 }
8784
8785 *tls_mask |= tls_set;
8786 *tls_mask &= ~tls_clear;
8787 }
8788
8789 if (elf_section_data (sec)->relocs != relstart)
8790 free (relstart);
8791 }
8792
8793 if (locsyms != NULL
8794 && (elf_symtab_hdr (ibfd).contents != (unsigned char *) locsyms))
8795 {
8796 if (!info->keep_memory)
8797 free (locsyms);
8798 else
8799 elf_symtab_hdr (ibfd).contents = (unsigned char *) locsyms;
8800 }
8801 }
8802
8803 if (toc_ref != NULL)
8804 free (toc_ref);
8805 htab->do_tls_opt = 1;
8806 return TRUE;
8807 }
8808
8809 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
8810 the values of any global symbols in a toc section that has been
8811 edited. Globals in toc sections should be a rarity, so this function
8812 sets a flag if any are found in toc sections other than the one just
8813 edited, so that further hash table traversals can be avoided. */
8814
8815 struct adjust_toc_info
8816 {
8817 asection *toc;
8818 unsigned long *skip;
8819 bfd_boolean global_toc_syms;
8820 };
8821
8822 enum toc_skip_enum { ref_from_discarded = 1, can_optimize = 2 };
8823
8824 static bfd_boolean
8825 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
8826 {
8827 struct ppc_link_hash_entry *eh;
8828 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
8829 unsigned long i;
8830
8831 if (h->root.type != bfd_link_hash_defined
8832 && h->root.type != bfd_link_hash_defweak)
8833 return TRUE;
8834
8835 eh = (struct ppc_link_hash_entry *) h;
8836 if (eh->adjust_done)
8837 return TRUE;
8838
8839 if (eh->elf.root.u.def.section == toc_inf->toc)
8840 {
8841 if (eh->elf.root.u.def.value > toc_inf->toc->rawsize)
8842 i = toc_inf->toc->rawsize >> 3;
8843 else
8844 i = eh->elf.root.u.def.value >> 3;
8845
8846 if ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0)
8847 {
8848 _bfd_error_handler
8849 (_("%s defined on removed toc entry"), eh->elf.root.root.string);
8850 do
8851 ++i;
8852 while ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0);
8853 eh->elf.root.u.def.value = (bfd_vma) i << 3;
8854 }
8855
8856 eh->elf.root.u.def.value -= toc_inf->skip[i];
8857 eh->adjust_done = 1;
8858 }
8859 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
8860 toc_inf->global_toc_syms = TRUE;
8861
8862 return TRUE;
8863 }
8864
8865 /* Return TRUE iff INSN with a relocation of R_TYPE is one we expect
8866 on a _LO variety toc/got reloc. */
8867
8868 static bfd_boolean
8869 ok_lo_toc_insn (unsigned int insn, enum elf_ppc64_reloc_type r_type)
8870 {
8871 return ((insn & (0x3f << 26)) == 12u << 26 /* addic */
8872 || (insn & (0x3f << 26)) == 14u << 26 /* addi */
8873 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
8874 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
8875 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
8876 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
8877 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
8878 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
8879 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
8880 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
8881 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
8882 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
8883 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
8884 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
8885 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
8886 || (insn & (0x3f << 26)) == 56u << 26 /* lq,lfq */
8887 || ((insn & (0x3f << 26)) == 57u << 26 /* lxsd,lxssp,lfdp */
8888 /* Exclude lfqu by testing reloc. If relocs are ever
8889 defined for the reduced D field in psq_lu then those
8890 will need testing too. */
8891 && r_type != R_PPC64_TOC16_LO && r_type != R_PPC64_GOT16_LO)
8892 || ((insn & (0x3f << 26)) == 58u << 26 /* ld,lwa */
8893 && (insn & 1) == 0)
8894 || (insn & (0x3f << 26)) == 60u << 26 /* stfq */
8895 || ((insn & (0x3f << 26)) == 61u << 26 /* lxv,stx{v,sd,ssp},stfdp */
8896 /* Exclude stfqu. psq_stu as above for psq_lu. */
8897 && r_type != R_PPC64_TOC16_LO && r_type != R_PPC64_GOT16_LO)
8898 || ((insn & (0x3f << 26)) == 62u << 26 /* std,stq */
8899 && (insn & 1) == 0));
8900 }
8901
8902 /* Examine all relocs referencing .toc sections in order to remove
8903 unused .toc entries. */
8904
8905 bfd_boolean
8906 ppc64_elf_edit_toc (struct bfd_link_info *info)
8907 {
8908 bfd *ibfd;
8909 struct adjust_toc_info toc_inf;
8910 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8911
8912 htab->do_toc_opt = 1;
8913 toc_inf.global_toc_syms = TRUE;
8914 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
8915 {
8916 asection *toc, *sec;
8917 Elf_Internal_Shdr *symtab_hdr;
8918 Elf_Internal_Sym *local_syms;
8919 Elf_Internal_Rela *relstart, *rel, *toc_relocs;
8920 unsigned long *skip, *drop;
8921 unsigned char *used;
8922 unsigned char *keep, last, some_unused;
8923
8924 if (!is_ppc64_elf (ibfd))
8925 continue;
8926
8927 toc = bfd_get_section_by_name (ibfd, ".toc");
8928 if (toc == NULL
8929 || toc->size == 0
8930 || toc->sec_info_type == SEC_INFO_TYPE_JUST_SYMS
8931 || discarded_section (toc))
8932 continue;
8933
8934 toc_relocs = NULL;
8935 local_syms = NULL;
8936 symtab_hdr = &elf_symtab_hdr (ibfd);
8937
8938 /* Look at sections dropped from the final link. */
8939 skip = NULL;
8940 relstart = NULL;
8941 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8942 {
8943 if (sec->reloc_count == 0
8944 || !discarded_section (sec)
8945 || get_opd_info (sec)
8946 || (sec->flags & SEC_ALLOC) == 0
8947 || (sec->flags & SEC_DEBUGGING) != 0)
8948 continue;
8949
8950 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
8951 if (relstart == NULL)
8952 goto error_ret;
8953
8954 /* Run through the relocs to see which toc entries might be
8955 unused. */
8956 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8957 {
8958 enum elf_ppc64_reloc_type r_type;
8959 unsigned long r_symndx;
8960 asection *sym_sec;
8961 struct elf_link_hash_entry *h;
8962 Elf_Internal_Sym *sym;
8963 bfd_vma val;
8964
8965 r_type = ELF64_R_TYPE (rel->r_info);
8966 switch (r_type)
8967 {
8968 default:
8969 continue;
8970
8971 case R_PPC64_TOC16:
8972 case R_PPC64_TOC16_LO:
8973 case R_PPC64_TOC16_HI:
8974 case R_PPC64_TOC16_HA:
8975 case R_PPC64_TOC16_DS:
8976 case R_PPC64_TOC16_LO_DS:
8977 break;
8978 }
8979
8980 r_symndx = ELF64_R_SYM (rel->r_info);
8981 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8982 r_symndx, ibfd))
8983 goto error_ret;
8984
8985 if (sym_sec != toc)
8986 continue;
8987
8988 if (h != NULL)
8989 val = h->root.u.def.value;
8990 else
8991 val = sym->st_value;
8992 val += rel->r_addend;
8993
8994 if (val >= toc->size)
8995 continue;
8996
8997 /* Anything in the toc ought to be aligned to 8 bytes.
8998 If not, don't mark as unused. */
8999 if (val & 7)
9000 continue;
9001
9002 if (skip == NULL)
9003 {
9004 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
9005 if (skip == NULL)
9006 goto error_ret;
9007 }
9008
9009 skip[val >> 3] = ref_from_discarded;
9010 }
9011
9012 if (elf_section_data (sec)->relocs != relstart)
9013 free (relstart);
9014 }
9015
9016 /* For largetoc loads of address constants, we can convert
9017 . addis rx,2,addr@got@ha
9018 . ld ry,addr@got@l(rx)
9019 to
9020 . addis rx,2,addr@toc@ha
9021 . addi ry,rx,addr@toc@l
9022 when addr is within 2G of the toc pointer. This then means
9023 that the word storing "addr" in the toc is no longer needed. */
9024
9025 if (!ppc64_elf_tdata (ibfd)->has_small_toc_reloc
9026 && toc->output_section->rawsize < (bfd_vma) 1 << 31
9027 && toc->reloc_count != 0)
9028 {
9029 /* Read toc relocs. */
9030 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
9031 info->keep_memory);
9032 if (toc_relocs == NULL)
9033 goto error_ret;
9034
9035 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
9036 {
9037 enum elf_ppc64_reloc_type r_type;
9038 unsigned long r_symndx;
9039 asection *sym_sec;
9040 struct elf_link_hash_entry *h;
9041 Elf_Internal_Sym *sym;
9042 bfd_vma val, addr;
9043
9044 r_type = ELF64_R_TYPE (rel->r_info);
9045 if (r_type != R_PPC64_ADDR64)
9046 continue;
9047
9048 r_symndx = ELF64_R_SYM (rel->r_info);
9049 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9050 r_symndx, ibfd))
9051 goto error_ret;
9052
9053 if (sym_sec == NULL
9054 || sym_sec->output_section == NULL
9055 || discarded_section (sym_sec))
9056 continue;
9057
9058 if (!SYMBOL_REFERENCES_LOCAL (info, h))
9059 continue;
9060
9061 if (h != NULL)
9062 {
9063 if (h->type == STT_GNU_IFUNC)
9064 continue;
9065 val = h->root.u.def.value;
9066 }
9067 else
9068 {
9069 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
9070 continue;
9071 val = sym->st_value;
9072 }
9073 val += rel->r_addend;
9074 val += sym_sec->output_section->vma + sym_sec->output_offset;
9075
9076 /* We don't yet know the exact toc pointer value, but we
9077 know it will be somewhere in the toc section. Don't
9078 optimize if the difference from any possible toc
9079 pointer is outside [ff..f80008000, 7fff7fff]. */
9080 addr = toc->output_section->vma + TOC_BASE_OFF;
9081 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
9082 continue;
9083
9084 addr = toc->output_section->vma + toc->output_section->rawsize;
9085 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
9086 continue;
9087
9088 if (skip == NULL)
9089 {
9090 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
9091 if (skip == NULL)
9092 goto error_ret;
9093 }
9094
9095 skip[rel->r_offset >> 3]
9096 |= can_optimize | ((rel - toc_relocs) << 2);
9097 }
9098 }
9099
9100 if (skip == NULL)
9101 continue;
9102
9103 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
9104 if (used == NULL)
9105 {
9106 error_ret:
9107 if (local_syms != NULL
9108 && symtab_hdr->contents != (unsigned char *) local_syms)
9109 free (local_syms);
9110 if (sec != NULL
9111 && relstart != NULL
9112 && elf_section_data (sec)->relocs != relstart)
9113 free (relstart);
9114 if (toc_relocs != NULL
9115 && elf_section_data (toc)->relocs != toc_relocs)
9116 free (toc_relocs);
9117 if (skip != NULL)
9118 free (skip);
9119 return FALSE;
9120 }
9121
9122 /* Now check all kept sections that might reference the toc.
9123 Check the toc itself last. */
9124 for (sec = (ibfd->sections == toc && toc->next ? toc->next
9125 : ibfd->sections);
9126 sec != NULL;
9127 sec = (sec == toc ? NULL
9128 : sec->next == NULL ? toc
9129 : sec->next == toc && toc->next ? toc->next
9130 : sec->next))
9131 {
9132 int repeat;
9133
9134 if (sec->reloc_count == 0
9135 || discarded_section (sec)
9136 || get_opd_info (sec)
9137 || (sec->flags & SEC_ALLOC) == 0
9138 || (sec->flags & SEC_DEBUGGING) != 0)
9139 continue;
9140
9141 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
9142 info->keep_memory);
9143 if (relstart == NULL)
9144 {
9145 free (used);
9146 goto error_ret;
9147 }
9148
9149 /* Mark toc entries referenced as used. */
9150 do
9151 {
9152 repeat = 0;
9153 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
9154 {
9155 enum elf_ppc64_reloc_type r_type;
9156 unsigned long r_symndx;
9157 asection *sym_sec;
9158 struct elf_link_hash_entry *h;
9159 Elf_Internal_Sym *sym;
9160 bfd_vma val;
9161 enum {no_check, check_lo, check_ha} insn_check;
9162
9163 r_type = ELF64_R_TYPE (rel->r_info);
9164 switch (r_type)
9165 {
9166 default:
9167 insn_check = no_check;
9168 break;
9169
9170 case R_PPC64_GOT_TLSLD16_HA:
9171 case R_PPC64_GOT_TLSGD16_HA:
9172 case R_PPC64_GOT_TPREL16_HA:
9173 case R_PPC64_GOT_DTPREL16_HA:
9174 case R_PPC64_GOT16_HA:
9175 case R_PPC64_TOC16_HA:
9176 insn_check = check_ha;
9177 break;
9178
9179 case R_PPC64_GOT_TLSLD16_LO:
9180 case R_PPC64_GOT_TLSGD16_LO:
9181 case R_PPC64_GOT_TPREL16_LO_DS:
9182 case R_PPC64_GOT_DTPREL16_LO_DS:
9183 case R_PPC64_GOT16_LO:
9184 case R_PPC64_GOT16_LO_DS:
9185 case R_PPC64_TOC16_LO:
9186 case R_PPC64_TOC16_LO_DS:
9187 insn_check = check_lo;
9188 break;
9189 }
9190
9191 if (insn_check != no_check)
9192 {
9193 bfd_vma off = rel->r_offset & ~3;
9194 unsigned char buf[4];
9195 unsigned int insn;
9196
9197 if (!bfd_get_section_contents (ibfd, sec, buf, off, 4))
9198 {
9199 free (used);
9200 goto error_ret;
9201 }
9202 insn = bfd_get_32 (ibfd, buf);
9203 if (insn_check == check_lo
9204 ? !ok_lo_toc_insn (insn, r_type)
9205 : ((insn & ((0x3f << 26) | 0x1f << 16))
9206 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */))
9207 {
9208 char str[12];
9209
9210 ppc64_elf_tdata (ibfd)->unexpected_toc_insn = 1;
9211 sprintf (str, "%#08x", insn);
9212 info->callbacks->einfo
9213 /* xgettext:c-format */
9214 (_("%H: toc optimization is not supported for"
9215 " %s instruction.\n"),
9216 ibfd, sec, rel->r_offset & ~3, str);
9217 }
9218 }
9219
9220 switch (r_type)
9221 {
9222 case R_PPC64_TOC16:
9223 case R_PPC64_TOC16_LO:
9224 case R_PPC64_TOC16_HI:
9225 case R_PPC64_TOC16_HA:
9226 case R_PPC64_TOC16_DS:
9227 case R_PPC64_TOC16_LO_DS:
9228 /* In case we're taking addresses of toc entries. */
9229 case R_PPC64_ADDR64:
9230 break;
9231
9232 default:
9233 continue;
9234 }
9235
9236 r_symndx = ELF64_R_SYM (rel->r_info);
9237 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9238 r_symndx, ibfd))
9239 {
9240 free (used);
9241 goto error_ret;
9242 }
9243
9244 if (sym_sec != toc)
9245 continue;
9246
9247 if (h != NULL)
9248 val = h->root.u.def.value;
9249 else
9250 val = sym->st_value;
9251 val += rel->r_addend;
9252
9253 if (val >= toc->size)
9254 continue;
9255
9256 if ((skip[val >> 3] & can_optimize) != 0)
9257 {
9258 bfd_vma off;
9259 unsigned char opc;
9260
9261 switch (r_type)
9262 {
9263 case R_PPC64_TOC16_HA:
9264 break;
9265
9266 case R_PPC64_TOC16_LO_DS:
9267 off = rel->r_offset;
9268 off += (bfd_big_endian (ibfd) ? -2 : 3);
9269 if (!bfd_get_section_contents (ibfd, sec, &opc,
9270 off, 1))
9271 {
9272 free (used);
9273 goto error_ret;
9274 }
9275 if ((opc & (0x3f << 2)) == (58u << 2))
9276 break;
9277 /* Fall through. */
9278
9279 default:
9280 /* Wrong sort of reloc, or not a ld. We may
9281 as well clear ref_from_discarded too. */
9282 skip[val >> 3] = 0;
9283 }
9284 }
9285
9286 if (sec != toc)
9287 used[val >> 3] = 1;
9288 /* For the toc section, we only mark as used if this
9289 entry itself isn't unused. */
9290 else if ((used[rel->r_offset >> 3]
9291 || !(skip[rel->r_offset >> 3] & ref_from_discarded))
9292 && !used[val >> 3])
9293 {
9294 /* Do all the relocs again, to catch reference
9295 chains. */
9296 repeat = 1;
9297 used[val >> 3] = 1;
9298 }
9299 }
9300 }
9301 while (repeat);
9302
9303 if (elf_section_data (sec)->relocs != relstart)
9304 free (relstart);
9305 }
9306
9307 /* Merge the used and skip arrays. Assume that TOC
9308 doublewords not appearing as either used or unused belong
9309 to an entry more than one doubleword in size. */
9310 for (drop = skip, keep = used, last = 0, some_unused = 0;
9311 drop < skip + (toc->size + 7) / 8;
9312 ++drop, ++keep)
9313 {
9314 if (*keep)
9315 {
9316 *drop &= ~ref_from_discarded;
9317 if ((*drop & can_optimize) != 0)
9318 some_unused = 1;
9319 last = 0;
9320 }
9321 else if ((*drop & ref_from_discarded) != 0)
9322 {
9323 some_unused = 1;
9324 last = ref_from_discarded;
9325 }
9326 else
9327 *drop = last;
9328 }
9329
9330 free (used);
9331
9332 if (some_unused)
9333 {
9334 bfd_byte *contents, *src;
9335 unsigned long off;
9336 Elf_Internal_Sym *sym;
9337 bfd_boolean local_toc_syms = FALSE;
9338
9339 /* Shuffle the toc contents, and at the same time convert the
9340 skip array from booleans into offsets. */
9341 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
9342 goto error_ret;
9343
9344 elf_section_data (toc)->this_hdr.contents = contents;
9345
9346 for (src = contents, off = 0, drop = skip;
9347 src < contents + toc->size;
9348 src += 8, ++drop)
9349 {
9350 if ((*drop & (can_optimize | ref_from_discarded)) != 0)
9351 off += 8;
9352 else if (off != 0)
9353 {
9354 *drop = off;
9355 memcpy (src - off, src, 8);
9356 }
9357 }
9358 *drop = off;
9359 toc->rawsize = toc->size;
9360 toc->size = src - contents - off;
9361
9362 /* Adjust addends for relocs against the toc section sym,
9363 and optimize any accesses we can. */
9364 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
9365 {
9366 if (sec->reloc_count == 0
9367 || discarded_section (sec))
9368 continue;
9369
9370 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
9371 info->keep_memory);
9372 if (relstart == NULL)
9373 goto error_ret;
9374
9375 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
9376 {
9377 enum elf_ppc64_reloc_type r_type;
9378 unsigned long r_symndx;
9379 asection *sym_sec;
9380 struct elf_link_hash_entry *h;
9381 bfd_vma val;
9382
9383 r_type = ELF64_R_TYPE (rel->r_info);
9384 switch (r_type)
9385 {
9386 default:
9387 continue;
9388
9389 case R_PPC64_TOC16:
9390 case R_PPC64_TOC16_LO:
9391 case R_PPC64_TOC16_HI:
9392 case R_PPC64_TOC16_HA:
9393 case R_PPC64_TOC16_DS:
9394 case R_PPC64_TOC16_LO_DS:
9395 case R_PPC64_ADDR64:
9396 break;
9397 }
9398
9399 r_symndx = ELF64_R_SYM (rel->r_info);
9400 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9401 r_symndx, ibfd))
9402 goto error_ret;
9403
9404 if (sym_sec != toc)
9405 continue;
9406
9407 if (h != NULL)
9408 val = h->root.u.def.value;
9409 else
9410 {
9411 val = sym->st_value;
9412 if (val != 0)
9413 local_toc_syms = TRUE;
9414 }
9415
9416 val += rel->r_addend;
9417
9418 if (val > toc->rawsize)
9419 val = toc->rawsize;
9420 else if ((skip[val >> 3] & ref_from_discarded) != 0)
9421 continue;
9422 else if ((skip[val >> 3] & can_optimize) != 0)
9423 {
9424 Elf_Internal_Rela *tocrel
9425 = toc_relocs + (skip[val >> 3] >> 2);
9426 unsigned long tsym = ELF64_R_SYM (tocrel->r_info);
9427
9428 switch (r_type)
9429 {
9430 case R_PPC64_TOC16_HA:
9431 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_TOC16_HA);
9432 break;
9433
9434 case R_PPC64_TOC16_LO_DS:
9435 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_LO_DS_OPT);
9436 break;
9437
9438 default:
9439 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
9440 ppc_howto_init ();
9441 info->callbacks->einfo
9442 /* xgettext:c-format */
9443 (_("%H: %s references "
9444 "optimized away TOC entry\n"),
9445 ibfd, sec, rel->r_offset,
9446 ppc64_elf_howto_table[r_type]->name);
9447 bfd_set_error (bfd_error_bad_value);
9448 goto error_ret;
9449 }
9450 rel->r_addend = tocrel->r_addend;
9451 elf_section_data (sec)->relocs = relstart;
9452 continue;
9453 }
9454
9455 if (h != NULL || sym->st_value != 0)
9456 continue;
9457
9458 rel->r_addend -= skip[val >> 3];
9459 elf_section_data (sec)->relocs = relstart;
9460 }
9461
9462 if (elf_section_data (sec)->relocs != relstart)
9463 free (relstart);
9464 }
9465
9466 /* We shouldn't have local or global symbols defined in the TOC,
9467 but handle them anyway. */
9468 if (local_syms != NULL)
9469 for (sym = local_syms;
9470 sym < local_syms + symtab_hdr->sh_info;
9471 ++sym)
9472 if (sym->st_value != 0
9473 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
9474 {
9475 unsigned long i;
9476
9477 if (sym->st_value > toc->rawsize)
9478 i = toc->rawsize >> 3;
9479 else
9480 i = sym->st_value >> 3;
9481
9482 if ((skip[i] & (ref_from_discarded | can_optimize)) != 0)
9483 {
9484 if (local_toc_syms)
9485 _bfd_error_handler
9486 (_("%s defined on removed toc entry"),
9487 bfd_elf_sym_name (ibfd, symtab_hdr, sym, NULL));
9488 do
9489 ++i;
9490 while ((skip[i] & (ref_from_discarded | can_optimize)));
9491 sym->st_value = (bfd_vma) i << 3;
9492 }
9493
9494 sym->st_value -= skip[i];
9495 symtab_hdr->contents = (unsigned char *) local_syms;
9496 }
9497
9498 /* Adjust any global syms defined in this toc input section. */
9499 if (toc_inf.global_toc_syms)
9500 {
9501 toc_inf.toc = toc;
9502 toc_inf.skip = skip;
9503 toc_inf.global_toc_syms = FALSE;
9504 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
9505 &toc_inf);
9506 }
9507
9508 if (toc->reloc_count != 0)
9509 {
9510 Elf_Internal_Shdr *rel_hdr;
9511 Elf_Internal_Rela *wrel;
9512 bfd_size_type sz;
9513
9514 /* Remove unused toc relocs, and adjust those we keep. */
9515 if (toc_relocs == NULL)
9516 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
9517 info->keep_memory);
9518 if (toc_relocs == NULL)
9519 goto error_ret;
9520
9521 wrel = toc_relocs;
9522 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
9523 if ((skip[rel->r_offset >> 3]
9524 & (ref_from_discarded | can_optimize)) == 0)
9525 {
9526 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
9527 wrel->r_info = rel->r_info;
9528 wrel->r_addend = rel->r_addend;
9529 ++wrel;
9530 }
9531 else if (!dec_dynrel_count (rel->r_info, toc, info,
9532 &local_syms, NULL, NULL))
9533 goto error_ret;
9534
9535 elf_section_data (toc)->relocs = toc_relocs;
9536 toc->reloc_count = wrel - toc_relocs;
9537 rel_hdr = _bfd_elf_single_rel_hdr (toc);
9538 sz = rel_hdr->sh_entsize;
9539 rel_hdr->sh_size = toc->reloc_count * sz;
9540 }
9541 }
9542 else if (toc_relocs != NULL
9543 && elf_section_data (toc)->relocs != toc_relocs)
9544 free (toc_relocs);
9545
9546 if (local_syms != NULL
9547 && symtab_hdr->contents != (unsigned char *) local_syms)
9548 {
9549 if (!info->keep_memory)
9550 free (local_syms);
9551 else
9552 symtab_hdr->contents = (unsigned char *) local_syms;
9553 }
9554 free (skip);
9555 }
9556
9557 return TRUE;
9558 }
9559
9560 /* Return true iff input section I references the TOC using
9561 instructions limited to +/-32k offsets. */
9562
9563 bfd_boolean
9564 ppc64_elf_has_small_toc_reloc (asection *i)
9565 {
9566 return (is_ppc64_elf (i->owner)
9567 && ppc64_elf_tdata (i->owner)->has_small_toc_reloc);
9568 }
9569
9570 /* Allocate space for one GOT entry. */
9571
9572 static void
9573 allocate_got (struct elf_link_hash_entry *h,
9574 struct bfd_link_info *info,
9575 struct got_entry *gent)
9576 {
9577 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9578 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
9579 int entsize = (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)
9580 ? 16 : 8);
9581 int rentsize = (gent->tls_type & eh->tls_mask & TLS_GD
9582 ? 2 : 1) * sizeof (Elf64_External_Rela);
9583 asection *got = ppc64_elf_tdata (gent->owner)->got;
9584
9585 gent->got.offset = got->size;
9586 got->size += entsize;
9587
9588 if (h->type == STT_GNU_IFUNC)
9589 {
9590 htab->elf.irelplt->size += rentsize;
9591 htab->got_reli_size += rentsize;
9592 }
9593 else if (((bfd_link_pic (info)
9594 && !((gent->tls_type & TLS_TPREL) != 0
9595 && bfd_link_executable (info)
9596 && SYMBOL_REFERENCES_LOCAL (info, h)))
9597 || (htab->elf.dynamic_sections_created
9598 && h->dynindx != -1
9599 && !SYMBOL_REFERENCES_LOCAL (info, h)))
9600 && !UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
9601 {
9602 asection *relgot = ppc64_elf_tdata (gent->owner)->relgot;
9603 relgot->size += rentsize;
9604 }
9605 }
9606
9607 /* This function merges got entries in the same toc group. */
9608
9609 static void
9610 merge_got_entries (struct got_entry **pent)
9611 {
9612 struct got_entry *ent, *ent2;
9613
9614 for (ent = *pent; ent != NULL; ent = ent->next)
9615 if (!ent->is_indirect)
9616 for (ent2 = ent->next; ent2 != NULL; ent2 = ent2->next)
9617 if (!ent2->is_indirect
9618 && ent2->addend == ent->addend
9619 && ent2->tls_type == ent->tls_type
9620 && elf_gp (ent2->owner) == elf_gp (ent->owner))
9621 {
9622 ent2->is_indirect = TRUE;
9623 ent2->got.ent = ent;
9624 }
9625 }
9626
9627 /* If H is undefined, make it dynamic if that makes sense. */
9628
9629 static bfd_boolean
9630 ensure_undef_dynamic (struct bfd_link_info *info,
9631 struct elf_link_hash_entry *h)
9632 {
9633 struct elf_link_hash_table *htab = elf_hash_table (info);
9634
9635 if (htab->dynamic_sections_created
9636 && ((info->dynamic_undefined_weak != 0
9637 && h->root.type == bfd_link_hash_undefweak)
9638 || h->root.type == bfd_link_hash_undefined)
9639 && h->dynindx == -1
9640 && !h->forced_local
9641 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
9642 return bfd_elf_link_record_dynamic_symbol (info, h);
9643 return TRUE;
9644 }
9645
9646 /* Allocate space in .plt, .got and associated reloc sections for
9647 dynamic relocs. */
9648
9649 static bfd_boolean
9650 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
9651 {
9652 struct bfd_link_info *info;
9653 struct ppc_link_hash_table *htab;
9654 asection *s;
9655 struct ppc_link_hash_entry *eh;
9656 struct got_entry **pgent, *gent;
9657
9658 if (h->root.type == bfd_link_hash_indirect)
9659 return TRUE;
9660
9661 info = (struct bfd_link_info *) inf;
9662 htab = ppc_hash_table (info);
9663 if (htab == NULL)
9664 return FALSE;
9665
9666 eh = (struct ppc_link_hash_entry *) h;
9667 /* Run through the TLS GD got entries first if we're changing them
9668 to TPREL. */
9669 if ((eh->tls_mask & TLS_TPRELGD) != 0)
9670 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9671 if (gent->got.refcount > 0
9672 && (gent->tls_type & TLS_GD) != 0)
9673 {
9674 /* This was a GD entry that has been converted to TPREL. If
9675 there happens to be a TPREL entry we can use that one. */
9676 struct got_entry *ent;
9677 for (ent = h->got.glist; ent != NULL; ent = ent->next)
9678 if (ent->got.refcount > 0
9679 && (ent->tls_type & TLS_TPREL) != 0
9680 && ent->addend == gent->addend
9681 && ent->owner == gent->owner)
9682 {
9683 gent->got.refcount = 0;
9684 break;
9685 }
9686
9687 /* If not, then we'll be using our own TPREL entry. */
9688 if (gent->got.refcount != 0)
9689 gent->tls_type = TLS_TLS | TLS_TPREL;
9690 }
9691
9692 /* Remove any list entry that won't generate a word in the GOT before
9693 we call merge_got_entries. Otherwise we risk merging to empty
9694 entries. */
9695 pgent = &h->got.glist;
9696 while ((gent = *pgent) != NULL)
9697 if (gent->got.refcount > 0)
9698 {
9699 if ((gent->tls_type & TLS_LD) != 0
9700 && !h->def_dynamic)
9701 {
9702 ppc64_tlsld_got (gent->owner)->got.refcount += 1;
9703 *pgent = gent->next;
9704 }
9705 else
9706 pgent = &gent->next;
9707 }
9708 else
9709 *pgent = gent->next;
9710
9711 if (!htab->do_multi_toc)
9712 merge_got_entries (&h->got.glist);
9713
9714 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9715 if (!gent->is_indirect)
9716 {
9717 /* Make sure this symbol is output as a dynamic symbol. */
9718 if (!ensure_undef_dynamic (info, h))
9719 return FALSE;
9720
9721 if (!is_ppc64_elf (gent->owner))
9722 abort ();
9723
9724 allocate_got (h, info, gent);
9725 }
9726
9727 /* If no dynamic sections we can't have dynamic relocs, except for
9728 IFUNCs which are handled even in static executables. */
9729 if (!htab->elf.dynamic_sections_created
9730 && h->type != STT_GNU_IFUNC)
9731 eh->dyn_relocs = NULL;
9732
9733 /* Discard relocs on undefined symbols that must be local. */
9734 else if (h->root.type == bfd_link_hash_undefined
9735 && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
9736 eh->dyn_relocs = NULL;
9737
9738 /* Also discard relocs on undefined weak syms with non-default
9739 visibility, or when dynamic_undefined_weak says so. */
9740 else if (UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
9741 eh->dyn_relocs = NULL;
9742
9743 if (eh->dyn_relocs != NULL)
9744 {
9745 struct elf_dyn_relocs *p, **pp;
9746
9747 /* In the shared -Bsymbolic case, discard space allocated for
9748 dynamic pc-relative relocs against symbols which turn out to
9749 be defined in regular objects. For the normal shared case,
9750 discard space for relocs that have become local due to symbol
9751 visibility changes. */
9752
9753 if (bfd_link_pic (info))
9754 {
9755 /* Relocs that use pc_count are those that appear on a call
9756 insn, or certain REL relocs (see must_be_dyn_reloc) that
9757 can be generated via assembly. We want calls to
9758 protected symbols to resolve directly to the function
9759 rather than going via the plt. If people want function
9760 pointer comparisons to work as expected then they should
9761 avoid writing weird assembly. */
9762 if (SYMBOL_CALLS_LOCAL (info, h))
9763 {
9764 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
9765 {
9766 p->count -= p->pc_count;
9767 p->pc_count = 0;
9768 if (p->count == 0)
9769 *pp = p->next;
9770 else
9771 pp = &p->next;
9772 }
9773 }
9774
9775 if (eh->dyn_relocs != NULL)
9776 {
9777 /* Make sure this symbol is output as a dynamic symbol. */
9778 if (!ensure_undef_dynamic (info, h))
9779 return FALSE;
9780 }
9781 }
9782 else if (ELIMINATE_COPY_RELOCS && h->type != STT_GNU_IFUNC)
9783 {
9784 /* For the non-pic case, discard space for relocs against
9785 symbols which turn out to need copy relocs or are not
9786 dynamic. */
9787 if (h->dynamic_adjusted
9788 && !h->def_regular
9789 && !ELF_COMMON_DEF_P (h))
9790 {
9791 /* Make sure this symbol is output as a dynamic symbol. */
9792 if (!ensure_undef_dynamic (info, h))
9793 return FALSE;
9794
9795 if (h->dynindx == -1)
9796 eh->dyn_relocs = NULL;
9797 }
9798 else
9799 eh->dyn_relocs = NULL;
9800 }
9801
9802 /* Finally, allocate space. */
9803 for (p = eh->dyn_relocs; p != NULL; p = p->next)
9804 {
9805 asection *sreloc = elf_section_data (p->sec)->sreloc;
9806 if (eh->elf.type == STT_GNU_IFUNC)
9807 sreloc = htab->elf.irelplt;
9808 sreloc->size += p->count * sizeof (Elf64_External_Rela);
9809 }
9810 }
9811
9812 if ((htab->elf.dynamic_sections_created
9813 && h->dynindx != -1)
9814 || h->type == STT_GNU_IFUNC)
9815 {
9816 struct plt_entry *pent;
9817 bfd_boolean doneone = FALSE;
9818 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
9819 if (pent->plt.refcount > 0)
9820 {
9821 if (!htab->elf.dynamic_sections_created
9822 || h->dynindx == -1)
9823 {
9824 s = htab->elf.iplt;
9825 pent->plt.offset = s->size;
9826 s->size += PLT_ENTRY_SIZE (htab);
9827 s = htab->elf.irelplt;
9828 }
9829 else
9830 {
9831 /* If this is the first .plt entry, make room for the special
9832 first entry. */
9833 s = htab->elf.splt;
9834 if (s->size == 0)
9835 s->size += PLT_INITIAL_ENTRY_SIZE (htab);
9836
9837 pent->plt.offset = s->size;
9838
9839 /* Make room for this entry. */
9840 s->size += PLT_ENTRY_SIZE (htab);
9841
9842 /* Make room for the .glink code. */
9843 s = htab->glink;
9844 if (s->size == 0)
9845 s->size += GLINK_CALL_STUB_SIZE;
9846 if (htab->opd_abi)
9847 {
9848 /* We need bigger stubs past index 32767. */
9849 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
9850 s->size += 4;
9851 s->size += 2*4;
9852 }
9853 else
9854 s->size += 4;
9855
9856 /* We also need to make an entry in the .rela.plt section. */
9857 s = htab->elf.srelplt;
9858 }
9859 s->size += sizeof (Elf64_External_Rela);
9860 doneone = TRUE;
9861 }
9862 else
9863 pent->plt.offset = (bfd_vma) -1;
9864 if (!doneone)
9865 {
9866 h->plt.plist = NULL;
9867 h->needs_plt = 0;
9868 }
9869 }
9870 else
9871 {
9872 h->plt.plist = NULL;
9873 h->needs_plt = 0;
9874 }
9875
9876 return TRUE;
9877 }
9878
9879 /* Called via elf_link_hash_traverse from ppc64_elf_size_dynamic_sections
9880 to set up space for global entry stubs. These are put in glink,
9881 after the branch table. */
9882
9883 static bfd_boolean
9884 size_global_entry_stubs (struct elf_link_hash_entry *h, void *inf)
9885 {
9886 struct bfd_link_info *info;
9887 struct ppc_link_hash_table *htab;
9888 struct plt_entry *pent;
9889 asection *s;
9890
9891 if (h->root.type == bfd_link_hash_indirect)
9892 return TRUE;
9893
9894 if (!h->pointer_equality_needed)
9895 return TRUE;
9896
9897 if (h->def_regular)
9898 return TRUE;
9899
9900 info = inf;
9901 htab = ppc_hash_table (info);
9902 if (htab == NULL)
9903 return FALSE;
9904
9905 s = htab->glink;
9906 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
9907 if (pent->plt.offset != (bfd_vma) -1
9908 && pent->addend == 0)
9909 {
9910 /* For ELFv2, if this symbol is not defined in a regular file
9911 and we are not generating a shared library or pie, then we
9912 need to define the symbol in the executable on a call stub.
9913 This is to avoid text relocations. */
9914 s->size = (s->size + 15) & -16;
9915 h->root.type = bfd_link_hash_defined;
9916 h->root.u.def.section = s;
9917 h->root.u.def.value = s->size;
9918 s->size += 16;
9919 break;
9920 }
9921 return TRUE;
9922 }
9923
9924 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
9925 read-only sections. */
9926
9927 static bfd_boolean
9928 maybe_set_textrel (struct elf_link_hash_entry *h, void *inf)
9929 {
9930 asection *sec;
9931
9932 if (h->root.type == bfd_link_hash_indirect)
9933 return TRUE;
9934
9935 sec = readonly_dynrelocs (h);
9936 if (sec != NULL)
9937 {
9938 struct bfd_link_info *info = (struct bfd_link_info *) inf;
9939
9940 info->flags |= DF_TEXTREL;
9941 info->callbacks->minfo
9942 (_("%B: dynamic relocation in read-only section `%A'\n"),
9943 sec->owner, sec);
9944
9945 /* Not an error, just cut short the traversal. */
9946 return FALSE;
9947 }
9948 return TRUE;
9949 }
9950
9951 /* Set the sizes of the dynamic sections. */
9952
9953 static bfd_boolean
9954 ppc64_elf_size_dynamic_sections (bfd *output_bfd,
9955 struct bfd_link_info *info)
9956 {
9957 struct ppc_link_hash_table *htab;
9958 bfd *dynobj;
9959 asection *s;
9960 bfd_boolean relocs;
9961 bfd *ibfd;
9962 struct got_entry *first_tlsld;
9963
9964 htab = ppc_hash_table (info);
9965 if (htab == NULL)
9966 return FALSE;
9967
9968 dynobj = htab->elf.dynobj;
9969 if (dynobj == NULL)
9970 abort ();
9971
9972 if (htab->elf.dynamic_sections_created)
9973 {
9974 /* Set the contents of the .interp section to the interpreter. */
9975 if (bfd_link_executable (info) && !info->nointerp)
9976 {
9977 s = bfd_get_linker_section (dynobj, ".interp");
9978 if (s == NULL)
9979 abort ();
9980 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
9981 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
9982 }
9983 }
9984
9985 /* Set up .got offsets for local syms, and space for local dynamic
9986 relocs. */
9987 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
9988 {
9989 struct got_entry **lgot_ents;
9990 struct got_entry **end_lgot_ents;
9991 struct plt_entry **local_plt;
9992 struct plt_entry **end_local_plt;
9993 unsigned char *lgot_masks;
9994 bfd_size_type locsymcount;
9995 Elf_Internal_Shdr *symtab_hdr;
9996
9997 if (!is_ppc64_elf (ibfd))
9998 continue;
9999
10000 for (s = ibfd->sections; s != NULL; s = s->next)
10001 {
10002 struct ppc_dyn_relocs *p;
10003
10004 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
10005 {
10006 if (!bfd_is_abs_section (p->sec)
10007 && bfd_is_abs_section (p->sec->output_section))
10008 {
10009 /* Input section has been discarded, either because
10010 it is a copy of a linkonce section or due to
10011 linker script /DISCARD/, so we'll be discarding
10012 the relocs too. */
10013 }
10014 else if (p->count != 0)
10015 {
10016 asection *srel = elf_section_data (p->sec)->sreloc;
10017 if (p->ifunc)
10018 srel = htab->elf.irelplt;
10019 srel->size += p->count * sizeof (Elf64_External_Rela);
10020 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
10021 info->flags |= DF_TEXTREL;
10022 }
10023 }
10024 }
10025
10026 lgot_ents = elf_local_got_ents (ibfd);
10027 if (!lgot_ents)
10028 continue;
10029
10030 symtab_hdr = &elf_symtab_hdr (ibfd);
10031 locsymcount = symtab_hdr->sh_info;
10032 end_lgot_ents = lgot_ents + locsymcount;
10033 local_plt = (struct plt_entry **) end_lgot_ents;
10034 end_local_plt = local_plt + locsymcount;
10035 lgot_masks = (unsigned char *) end_local_plt;
10036 s = ppc64_elf_tdata (ibfd)->got;
10037 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
10038 {
10039 struct got_entry **pent, *ent;
10040
10041 pent = lgot_ents;
10042 while ((ent = *pent) != NULL)
10043 if (ent->got.refcount > 0)
10044 {
10045 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
10046 {
10047 ppc64_tlsld_got (ibfd)->got.refcount += 1;
10048 *pent = ent->next;
10049 }
10050 else
10051 {
10052 unsigned int ent_size = 8;
10053 unsigned int rel_size = sizeof (Elf64_External_Rela);
10054
10055 ent->got.offset = s->size;
10056 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
10057 {
10058 ent_size *= 2;
10059 rel_size *= 2;
10060 }
10061 s->size += ent_size;
10062 if ((*lgot_masks & PLT_IFUNC) != 0)
10063 {
10064 htab->elf.irelplt->size += rel_size;
10065 htab->got_reli_size += rel_size;
10066 }
10067 else if (bfd_link_pic (info)
10068 && !((ent->tls_type & TLS_TPREL) != 0
10069 && bfd_link_executable (info)))
10070 {
10071 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
10072 srel->size += rel_size;
10073 }
10074 pent = &ent->next;
10075 }
10076 }
10077 else
10078 *pent = ent->next;
10079 }
10080
10081 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
10082 for (; local_plt < end_local_plt; ++local_plt)
10083 {
10084 struct plt_entry *ent;
10085
10086 for (ent = *local_plt; ent != NULL; ent = ent->next)
10087 if (ent->plt.refcount > 0)
10088 {
10089 s = htab->elf.iplt;
10090 ent->plt.offset = s->size;
10091 s->size += PLT_ENTRY_SIZE (htab);
10092
10093 htab->elf.irelplt->size += sizeof (Elf64_External_Rela);
10094 }
10095 else
10096 ent->plt.offset = (bfd_vma) -1;
10097 }
10098 }
10099
10100 /* Allocate global sym .plt and .got entries, and space for global
10101 sym dynamic relocs. */
10102 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
10103 /* Stash the end of glink branch table. */
10104 if (htab->glink != NULL)
10105 htab->glink->rawsize = htab->glink->size;
10106
10107 if (!htab->opd_abi && !bfd_link_pic (info))
10108 elf_link_hash_traverse (&htab->elf, size_global_entry_stubs, info);
10109
10110 first_tlsld = NULL;
10111 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
10112 {
10113 struct got_entry *ent;
10114
10115 if (!is_ppc64_elf (ibfd))
10116 continue;
10117
10118 ent = ppc64_tlsld_got (ibfd);
10119 if (ent->got.refcount > 0)
10120 {
10121 if (!htab->do_multi_toc && first_tlsld != NULL)
10122 {
10123 ent->is_indirect = TRUE;
10124 ent->got.ent = first_tlsld;
10125 }
10126 else
10127 {
10128 if (first_tlsld == NULL)
10129 first_tlsld = ent;
10130 s = ppc64_elf_tdata (ibfd)->got;
10131 ent->got.offset = s->size;
10132 ent->owner = ibfd;
10133 s->size += 16;
10134 if (bfd_link_pic (info))
10135 {
10136 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
10137 srel->size += sizeof (Elf64_External_Rela);
10138 }
10139 }
10140 }
10141 else
10142 ent->got.offset = (bfd_vma) -1;
10143 }
10144
10145 /* We now have determined the sizes of the various dynamic sections.
10146 Allocate memory for them. */
10147 relocs = FALSE;
10148 for (s = dynobj->sections; s != NULL; s = s->next)
10149 {
10150 if ((s->flags & SEC_LINKER_CREATED) == 0)
10151 continue;
10152
10153 if (s == htab->brlt || s == htab->relbrlt)
10154 /* These haven't been allocated yet; don't strip. */
10155 continue;
10156 else if (s == htab->elf.sgot
10157 || s == htab->elf.splt
10158 || s == htab->elf.iplt
10159 || s == htab->glink
10160 || s == htab->elf.sdynbss
10161 || s == htab->elf.sdynrelro)
10162 {
10163 /* Strip this section if we don't need it; see the
10164 comment below. */
10165 }
10166 else if (s == htab->glink_eh_frame)
10167 {
10168 if (!bfd_is_abs_section (s->output_section))
10169 /* Not sized yet. */
10170 continue;
10171 }
10172 else if (CONST_STRNEQ (s->name, ".rela"))
10173 {
10174 if (s->size != 0)
10175 {
10176 if (s != htab->elf.srelplt)
10177 relocs = TRUE;
10178
10179 /* We use the reloc_count field as a counter if we need
10180 to copy relocs into the output file. */
10181 s->reloc_count = 0;
10182 }
10183 }
10184 else
10185 {
10186 /* It's not one of our sections, so don't allocate space. */
10187 continue;
10188 }
10189
10190 if (s->size == 0)
10191 {
10192 /* If we don't need this section, strip it from the
10193 output file. This is mostly to handle .rela.bss and
10194 .rela.plt. We must create both sections in
10195 create_dynamic_sections, because they must be created
10196 before the linker maps input sections to output
10197 sections. The linker does that before
10198 adjust_dynamic_symbol is called, and it is that
10199 function which decides whether anything needs to go
10200 into these sections. */
10201 s->flags |= SEC_EXCLUDE;
10202 continue;
10203 }
10204
10205 if (bfd_is_abs_section (s->output_section))
10206 _bfd_error_handler (_("warning: discarding dynamic section %s"),
10207 s->name);
10208
10209 if ((s->flags & SEC_HAS_CONTENTS) == 0)
10210 continue;
10211
10212 /* Allocate memory for the section contents. We use bfd_zalloc
10213 here in case unused entries are not reclaimed before the
10214 section's contents are written out. This should not happen,
10215 but this way if it does we get a R_PPC64_NONE reloc in .rela
10216 sections instead of garbage.
10217 We also rely on the section contents being zero when writing
10218 the GOT and .dynrelro. */
10219 s->contents = bfd_zalloc (dynobj, s->size);
10220 if (s->contents == NULL)
10221 return FALSE;
10222 }
10223
10224 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
10225 {
10226 if (!is_ppc64_elf (ibfd))
10227 continue;
10228
10229 s = ppc64_elf_tdata (ibfd)->got;
10230 if (s != NULL && s != htab->elf.sgot)
10231 {
10232 if (s->size == 0)
10233 s->flags |= SEC_EXCLUDE;
10234 else
10235 {
10236 s->contents = bfd_zalloc (ibfd, s->size);
10237 if (s->contents == NULL)
10238 return FALSE;
10239 }
10240 }
10241 s = ppc64_elf_tdata (ibfd)->relgot;
10242 if (s != NULL)
10243 {
10244 if (s->size == 0)
10245 s->flags |= SEC_EXCLUDE;
10246 else
10247 {
10248 s->contents = bfd_zalloc (ibfd, s->size);
10249 if (s->contents == NULL)
10250 return FALSE;
10251 relocs = TRUE;
10252 s->reloc_count = 0;
10253 }
10254 }
10255 }
10256
10257 if (htab->elf.dynamic_sections_created)
10258 {
10259 bfd_boolean tls_opt;
10260
10261 /* Add some entries to the .dynamic section. We fill in the
10262 values later, in ppc64_elf_finish_dynamic_sections, but we
10263 must add the entries now so that we get the correct size for
10264 the .dynamic section. The DT_DEBUG entry is filled in by the
10265 dynamic linker and used by the debugger. */
10266 #define add_dynamic_entry(TAG, VAL) \
10267 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
10268
10269 if (bfd_link_executable (info))
10270 {
10271 if (!add_dynamic_entry (DT_DEBUG, 0))
10272 return FALSE;
10273 }
10274
10275 if (htab->elf.splt != NULL && htab->elf.splt->size != 0)
10276 {
10277 if (!add_dynamic_entry (DT_PLTGOT, 0)
10278 || !add_dynamic_entry (DT_PLTRELSZ, 0)
10279 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
10280 || !add_dynamic_entry (DT_JMPREL, 0)
10281 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
10282 return FALSE;
10283 }
10284
10285 if (NO_OPD_RELOCS && abiversion (output_bfd) <= 1)
10286 {
10287 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
10288 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
10289 return FALSE;
10290 }
10291
10292 tls_opt = (htab->params->tls_get_addr_opt
10293 && htab->tls_get_addr_fd != NULL
10294 && htab->tls_get_addr_fd->elf.plt.plist != NULL);
10295 if (tls_opt || !htab->opd_abi)
10296 {
10297 if (!add_dynamic_entry (DT_PPC64_OPT, tls_opt ? PPC64_OPT_TLS : 0))
10298 return FALSE;
10299 }
10300
10301 if (relocs)
10302 {
10303 if (!add_dynamic_entry (DT_RELA, 0)
10304 || !add_dynamic_entry (DT_RELASZ, 0)
10305 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
10306 return FALSE;
10307
10308 /* If any dynamic relocs apply to a read-only section,
10309 then we need a DT_TEXTREL entry. */
10310 if ((info->flags & DF_TEXTREL) == 0)
10311 elf_link_hash_traverse (&htab->elf, maybe_set_textrel, info);
10312
10313 if ((info->flags & DF_TEXTREL) != 0)
10314 {
10315 if (!add_dynamic_entry (DT_TEXTREL, 0))
10316 return FALSE;
10317 }
10318 }
10319 }
10320 #undef add_dynamic_entry
10321
10322 return TRUE;
10323 }
10324
10325 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
10326
10327 static bfd_boolean
10328 ppc64_elf_hash_symbol (struct elf_link_hash_entry *h)
10329 {
10330 if (h->plt.plist != NULL
10331 && !h->def_regular
10332 && !h->pointer_equality_needed)
10333 return FALSE;
10334
10335 return _bfd_elf_hash_symbol (h);
10336 }
10337
10338 /* Determine the type of stub needed, if any, for a call. */
10339
10340 static inline enum ppc_stub_type
10341 ppc_type_of_stub (asection *input_sec,
10342 const Elf_Internal_Rela *rel,
10343 struct ppc_link_hash_entry **hash,
10344 struct plt_entry **plt_ent,
10345 bfd_vma destination,
10346 unsigned long local_off)
10347 {
10348 struct ppc_link_hash_entry *h = *hash;
10349 bfd_vma location;
10350 bfd_vma branch_offset;
10351 bfd_vma max_branch_offset;
10352 enum elf_ppc64_reloc_type r_type;
10353
10354 if (h != NULL)
10355 {
10356 struct plt_entry *ent;
10357 struct ppc_link_hash_entry *fdh = h;
10358 if (h->oh != NULL
10359 && h->oh->is_func_descriptor)
10360 {
10361 fdh = ppc_follow_link (h->oh);
10362 *hash = fdh;
10363 }
10364
10365 for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next)
10366 if (ent->addend == rel->r_addend
10367 && ent->plt.offset != (bfd_vma) -1)
10368 {
10369 *plt_ent = ent;
10370 return ppc_stub_plt_call;
10371 }
10372
10373 /* Here, we know we don't have a plt entry. If we don't have a
10374 either a defined function descriptor or a defined entry symbol
10375 in a regular object file, then it is pointless trying to make
10376 any other type of stub. */
10377 if (!is_static_defined (&fdh->elf)
10378 && !is_static_defined (&h->elf))
10379 return ppc_stub_none;
10380 }
10381 else if (elf_local_got_ents (input_sec->owner) != NULL)
10382 {
10383 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (input_sec->owner);
10384 struct plt_entry **local_plt = (struct plt_entry **)
10385 elf_local_got_ents (input_sec->owner) + symtab_hdr->sh_info;
10386 unsigned long r_symndx = ELF64_R_SYM (rel->r_info);
10387
10388 if (local_plt[r_symndx] != NULL)
10389 {
10390 struct plt_entry *ent;
10391
10392 for (ent = local_plt[r_symndx]; ent != NULL; ent = ent->next)
10393 if (ent->addend == rel->r_addend
10394 && ent->plt.offset != (bfd_vma) -1)
10395 {
10396 *plt_ent = ent;
10397 return ppc_stub_plt_call;
10398 }
10399 }
10400 }
10401
10402 /* Determine where the call point is. */
10403 location = (input_sec->output_offset
10404 + input_sec->output_section->vma
10405 + rel->r_offset);
10406
10407 branch_offset = destination - location;
10408 r_type = ELF64_R_TYPE (rel->r_info);
10409
10410 /* Determine if a long branch stub is needed. */
10411 max_branch_offset = 1 << 25;
10412 if (r_type != R_PPC64_REL24)
10413 max_branch_offset = 1 << 15;
10414
10415 if (branch_offset + max_branch_offset >= 2 * max_branch_offset - local_off)
10416 /* We need a stub. Figure out whether a long_branch or plt_branch
10417 is needed later. */
10418 return ppc_stub_long_branch;
10419
10420 return ppc_stub_none;
10421 }
10422
10423 /* With power7 weakly ordered memory model, it is possible for ld.so
10424 to update a plt entry in one thread and have another thread see a
10425 stale zero toc entry. To avoid this we need some sort of acquire
10426 barrier in the call stub. One solution is to make the load of the
10427 toc word seem to appear to depend on the load of the function entry
10428 word. Another solution is to test for r2 being zero, and branch to
10429 the appropriate glink entry if so.
10430
10431 . fake dep barrier compare
10432 . ld 12,xxx(2) ld 12,xxx(2)
10433 . mtctr 12 mtctr 12
10434 . xor 11,12,12 ld 2,xxx+8(2)
10435 . add 2,2,11 cmpldi 2,0
10436 . ld 2,xxx+8(2) bnectr+
10437 . bctr b <glink_entry>
10438
10439 The solution involving the compare turns out to be faster, so
10440 that's what we use unless the branch won't reach. */
10441
10442 #define ALWAYS_USE_FAKE_DEP 0
10443 #define ALWAYS_EMIT_R2SAVE 0
10444
10445 #define PPC_LO(v) ((v) & 0xffff)
10446 #define PPC_HI(v) (((v) >> 16) & 0xffff)
10447 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
10448
10449 static inline unsigned int
10450 plt_stub_size (struct ppc_link_hash_table *htab,
10451 struct ppc_stub_hash_entry *stub_entry,
10452 bfd_vma off)
10453 {
10454 unsigned size = 12;
10455
10456 if (ALWAYS_EMIT_R2SAVE
10457 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10458 size += 4;
10459 if (PPC_HA (off) != 0)
10460 size += 4;
10461 if (htab->opd_abi)
10462 {
10463 size += 4;
10464 if (htab->params->plt_static_chain)
10465 size += 4;
10466 if (htab->params->plt_thread_safe
10467 && htab->elf.dynamic_sections_created
10468 && stub_entry->h != NULL
10469 && stub_entry->h->elf.dynindx != -1)
10470 size += 8;
10471 if (PPC_HA (off + 8 + 8 * htab->params->plt_static_chain) != PPC_HA (off))
10472 size += 4;
10473 }
10474 if (stub_entry->h != NULL
10475 && (stub_entry->h == htab->tls_get_addr_fd
10476 || stub_entry->h == htab->tls_get_addr)
10477 && htab->params->tls_get_addr_opt)
10478 {
10479 size += 7 * 4;
10480 if (ALWAYS_EMIT_R2SAVE
10481 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10482 size += 6 * 4;
10483 }
10484 return size;
10485 }
10486
10487 /* Depending on the sign of plt_stub_align:
10488 If positive, return the padding to align to a 2**plt_stub_align
10489 boundary.
10490 If negative, if this stub would cross fewer 2**plt_stub_align
10491 boundaries if we align, then return the padding needed to do so. */
10492
10493 static inline unsigned int
10494 plt_stub_pad (struct ppc_link_hash_table *htab,
10495 struct ppc_stub_hash_entry *stub_entry,
10496 bfd_vma plt_off)
10497 {
10498 int stub_align;
10499 unsigned stub_size = plt_stub_size (htab, stub_entry, plt_off);
10500 bfd_vma stub_off = stub_entry->group->stub_sec->size;
10501
10502 if (htab->params->plt_stub_align >= 0)
10503 {
10504 stub_align = 1 << htab->params->plt_stub_align;
10505 if ((stub_off & (stub_align - 1)) != 0)
10506 return stub_align - (stub_off & (stub_align - 1));
10507 return 0;
10508 }
10509
10510 stub_align = 1 << -htab->params->plt_stub_align;
10511 if (((stub_off + stub_size - 1) & -stub_align) - (stub_off & -stub_align)
10512 > ((stub_size - 1) & -stub_align))
10513 return stub_align - (stub_off & (stub_align - 1));
10514 return 0;
10515 }
10516
10517 /* Build a .plt call stub. */
10518
10519 static inline bfd_byte *
10520 build_plt_stub (struct ppc_link_hash_table *htab,
10521 struct ppc_stub_hash_entry *stub_entry,
10522 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
10523 {
10524 bfd *obfd = htab->params->stub_bfd;
10525 bfd_boolean plt_load_toc = htab->opd_abi;
10526 bfd_boolean plt_static_chain = htab->params->plt_static_chain;
10527 bfd_boolean plt_thread_safe = (htab->params->plt_thread_safe
10528 && htab->elf.dynamic_sections_created
10529 && stub_entry->h != NULL
10530 && stub_entry->h->elf.dynindx != -1);
10531 bfd_boolean use_fake_dep = plt_thread_safe;
10532 bfd_vma cmp_branch_off = 0;
10533
10534 if (!ALWAYS_USE_FAKE_DEP
10535 && plt_load_toc
10536 && plt_thread_safe
10537 && !((stub_entry->h == htab->tls_get_addr_fd
10538 || stub_entry->h == htab->tls_get_addr)
10539 && htab->params->tls_get_addr_opt))
10540 {
10541 bfd_vma pltoff = stub_entry->plt_ent->plt.offset & ~1;
10542 bfd_vma pltindex = ((pltoff - PLT_INITIAL_ENTRY_SIZE (htab))
10543 / PLT_ENTRY_SIZE (htab));
10544 bfd_vma glinkoff = GLINK_CALL_STUB_SIZE + pltindex * 8;
10545 bfd_vma to, from;
10546
10547 if (pltindex > 32768)
10548 glinkoff += (pltindex - 32768) * 4;
10549 to = (glinkoff
10550 + htab->glink->output_offset
10551 + htab->glink->output_section->vma);
10552 from = (p - stub_entry->group->stub_sec->contents
10553 + 4 * (ALWAYS_EMIT_R2SAVE
10554 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10555 + 4 * (PPC_HA (offset) != 0)
10556 + 4 * (PPC_HA (offset + 8 + 8 * plt_static_chain)
10557 != PPC_HA (offset))
10558 + 4 * (plt_static_chain != 0)
10559 + 20
10560 + stub_entry->group->stub_sec->output_offset
10561 + stub_entry->group->stub_sec->output_section->vma);
10562 cmp_branch_off = to - from;
10563 use_fake_dep = cmp_branch_off + (1 << 25) >= (1 << 26);
10564 }
10565
10566 if (PPC_HA (offset) != 0)
10567 {
10568 if (r != NULL)
10569 {
10570 if (ALWAYS_EMIT_R2SAVE
10571 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10572 r[0].r_offset += 4;
10573 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
10574 r[1].r_offset = r[0].r_offset + 4;
10575 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10576 r[1].r_addend = r[0].r_addend;
10577 if (plt_load_toc)
10578 {
10579 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10580 {
10581 r[2].r_offset = r[1].r_offset + 4;
10582 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO);
10583 r[2].r_addend = r[0].r_addend;
10584 }
10585 else
10586 {
10587 r[2].r_offset = r[1].r_offset + 8 + 8 * use_fake_dep;
10588 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10589 r[2].r_addend = r[0].r_addend + 8;
10590 if (plt_static_chain)
10591 {
10592 r[3].r_offset = r[2].r_offset + 4;
10593 r[3].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10594 r[3].r_addend = r[0].r_addend + 16;
10595 }
10596 }
10597 }
10598 }
10599 if (ALWAYS_EMIT_R2SAVE
10600 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10601 bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p), p += 4;
10602 if (plt_load_toc)
10603 {
10604 bfd_put_32 (obfd, ADDIS_R11_R2 | PPC_HA (offset), p), p += 4;
10605 bfd_put_32 (obfd, LD_R12_0R11 | PPC_LO (offset), p), p += 4;
10606 }
10607 else
10608 {
10609 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
10610 bfd_put_32 (obfd, LD_R12_0R12 | PPC_LO (offset), p), p += 4;
10611 }
10612 if (plt_load_toc
10613 && PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10614 {
10615 bfd_put_32 (obfd, ADDI_R11_R11 | PPC_LO (offset), p), p += 4;
10616 offset = 0;
10617 }
10618 bfd_put_32 (obfd, MTCTR_R12, p), p += 4;
10619 if (plt_load_toc)
10620 {
10621 if (use_fake_dep)
10622 {
10623 bfd_put_32 (obfd, XOR_R2_R12_R12, p), p += 4;
10624 bfd_put_32 (obfd, ADD_R11_R11_R2, p), p += 4;
10625 }
10626 bfd_put_32 (obfd, LD_R2_0R11 | PPC_LO (offset + 8), p), p += 4;
10627 if (plt_static_chain)
10628 bfd_put_32 (obfd, LD_R11_0R11 | PPC_LO (offset + 16), p), p += 4;
10629 }
10630 }
10631 else
10632 {
10633 if (r != NULL)
10634 {
10635 if (ALWAYS_EMIT_R2SAVE
10636 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10637 r[0].r_offset += 4;
10638 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10639 if (plt_load_toc)
10640 {
10641 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10642 {
10643 r[1].r_offset = r[0].r_offset + 4;
10644 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16);
10645 r[1].r_addend = r[0].r_addend;
10646 }
10647 else
10648 {
10649 r[1].r_offset = r[0].r_offset + 8 + 8 * use_fake_dep;
10650 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10651 r[1].r_addend = r[0].r_addend + 8 + 8 * plt_static_chain;
10652 if (plt_static_chain)
10653 {
10654 r[2].r_offset = r[1].r_offset + 4;
10655 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10656 r[2].r_addend = r[0].r_addend + 8;
10657 }
10658 }
10659 }
10660 }
10661 if (ALWAYS_EMIT_R2SAVE
10662 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10663 bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p), p += 4;
10664 bfd_put_32 (obfd, LD_R12_0R2 | PPC_LO (offset), p), p += 4;
10665 if (plt_load_toc
10666 && PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10667 {
10668 bfd_put_32 (obfd, ADDI_R2_R2 | PPC_LO (offset), p), p += 4;
10669 offset = 0;
10670 }
10671 bfd_put_32 (obfd, MTCTR_R12, p), p += 4;
10672 if (plt_load_toc)
10673 {
10674 if (use_fake_dep)
10675 {
10676 bfd_put_32 (obfd, XOR_R11_R12_R12, p), p += 4;
10677 bfd_put_32 (obfd, ADD_R2_R2_R11, p), p += 4;
10678 }
10679 if (plt_static_chain)
10680 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset + 16), p), p += 4;
10681 bfd_put_32 (obfd, LD_R2_0R2 | PPC_LO (offset + 8), p), p += 4;
10682 }
10683 }
10684 if (plt_load_toc && plt_thread_safe && !use_fake_dep)
10685 {
10686 bfd_put_32 (obfd, CMPLDI_R2_0, p), p += 4;
10687 bfd_put_32 (obfd, BNECTR_P4, p), p += 4;
10688 bfd_put_32 (obfd, B_DOT | (cmp_branch_off & 0x3fffffc), p), p += 4;
10689 }
10690 else
10691 bfd_put_32 (obfd, BCTR, p), p += 4;
10692 return p;
10693 }
10694
10695 /* Build a special .plt call stub for __tls_get_addr. */
10696
10697 #define LD_R11_0R3 0xe9630000
10698 #define LD_R12_0R3 0xe9830000
10699 #define MR_R0_R3 0x7c601b78
10700 #define CMPDI_R11_0 0x2c2b0000
10701 #define ADD_R3_R12_R13 0x7c6c6a14
10702 #define BEQLR 0x4d820020
10703 #define MR_R3_R0 0x7c030378
10704 #define STD_R11_0R1 0xf9610000
10705 #define BCTRL 0x4e800421
10706 #define LD_R11_0R1 0xe9610000
10707 #define MTLR_R11 0x7d6803a6
10708
10709 static inline bfd_byte *
10710 build_tls_get_addr_stub (struct ppc_link_hash_table *htab,
10711 struct ppc_stub_hash_entry *stub_entry,
10712 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
10713 {
10714 bfd *obfd = htab->params->stub_bfd;
10715
10716 bfd_put_32 (obfd, LD_R11_0R3 + 0, p), p += 4;
10717 bfd_put_32 (obfd, LD_R12_0R3 + 8, p), p += 4;
10718 bfd_put_32 (obfd, MR_R0_R3, p), p += 4;
10719 bfd_put_32 (obfd, CMPDI_R11_0, p), p += 4;
10720 bfd_put_32 (obfd, ADD_R3_R12_R13, p), p += 4;
10721 bfd_put_32 (obfd, BEQLR, p), p += 4;
10722 bfd_put_32 (obfd, MR_R3_R0, p), p += 4;
10723 if (r != NULL)
10724 r[0].r_offset += 7 * 4;
10725 if (!ALWAYS_EMIT_R2SAVE
10726 && stub_entry->stub_type != ppc_stub_plt_call_r2save)
10727 return build_plt_stub (htab, stub_entry, p, offset, r);
10728
10729 bfd_put_32 (obfd, MFLR_R11, p), p += 4;
10730 bfd_put_32 (obfd, STD_R11_0R1 + STK_LINKER (htab), p), p += 4;
10731
10732 if (r != NULL)
10733 r[0].r_offset += 2 * 4;
10734 p = build_plt_stub (htab, stub_entry, p, offset, r);
10735 bfd_put_32 (obfd, BCTRL, p - 4);
10736
10737 bfd_put_32 (obfd, LD_R2_0R1 + STK_TOC (htab), p), p += 4;
10738 bfd_put_32 (obfd, LD_R11_0R1 + STK_LINKER (htab), p), p += 4;
10739 bfd_put_32 (obfd, MTLR_R11, p), p += 4;
10740 bfd_put_32 (obfd, BLR, p), p += 4;
10741
10742 return p;
10743 }
10744
10745 static Elf_Internal_Rela *
10746 get_relocs (asection *sec, int count)
10747 {
10748 Elf_Internal_Rela *relocs;
10749 struct bfd_elf_section_data *elfsec_data;
10750
10751 elfsec_data = elf_section_data (sec);
10752 relocs = elfsec_data->relocs;
10753 if (relocs == NULL)
10754 {
10755 bfd_size_type relsize;
10756 relsize = sec->reloc_count * sizeof (*relocs);
10757 relocs = bfd_alloc (sec->owner, relsize);
10758 if (relocs == NULL)
10759 return NULL;
10760 elfsec_data->relocs = relocs;
10761 elfsec_data->rela.hdr = bfd_zalloc (sec->owner,
10762 sizeof (Elf_Internal_Shdr));
10763 if (elfsec_data->rela.hdr == NULL)
10764 return NULL;
10765 elfsec_data->rela.hdr->sh_size = (sec->reloc_count
10766 * sizeof (Elf64_External_Rela));
10767 elfsec_data->rela.hdr->sh_entsize = sizeof (Elf64_External_Rela);
10768 sec->reloc_count = 0;
10769 }
10770 relocs += sec->reloc_count;
10771 sec->reloc_count += count;
10772 return relocs;
10773 }
10774
10775 static bfd_vma
10776 get_r2off (struct bfd_link_info *info,
10777 struct ppc_stub_hash_entry *stub_entry)
10778 {
10779 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10780 bfd_vma r2off = htab->sec_info[stub_entry->target_section->id].toc_off;
10781
10782 if (r2off == 0)
10783 {
10784 /* Support linking -R objects. Get the toc pointer from the
10785 opd entry. */
10786 char buf[8];
10787 if (!htab->opd_abi)
10788 return r2off;
10789 asection *opd = stub_entry->h->elf.root.u.def.section;
10790 bfd_vma opd_off = stub_entry->h->elf.root.u.def.value;
10791
10792 if (strcmp (opd->name, ".opd") != 0
10793 || opd->reloc_count != 0)
10794 {
10795 info->callbacks->einfo (_("%P: cannot find opd entry toc for `%T'\n"),
10796 stub_entry->h->elf.root.root.string);
10797 bfd_set_error (bfd_error_bad_value);
10798 return (bfd_vma) -1;
10799 }
10800 if (!bfd_get_section_contents (opd->owner, opd, buf, opd_off + 8, 8))
10801 return (bfd_vma) -1;
10802 r2off = bfd_get_64 (opd->owner, buf);
10803 r2off -= elf_gp (info->output_bfd);
10804 }
10805 r2off -= htab->sec_info[stub_entry->group->link_sec->id].toc_off;
10806 return r2off;
10807 }
10808
10809 static bfd_boolean
10810 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
10811 {
10812 struct ppc_stub_hash_entry *stub_entry;
10813 struct ppc_branch_hash_entry *br_entry;
10814 struct bfd_link_info *info;
10815 struct ppc_link_hash_table *htab;
10816 bfd_byte *loc;
10817 bfd_byte *p;
10818 bfd_vma dest, off;
10819 int size;
10820 Elf_Internal_Rela *r;
10821 asection *plt;
10822
10823 /* Massage our args to the form they really have. */
10824 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
10825 info = in_arg;
10826
10827 htab = ppc_hash_table (info);
10828 if (htab == NULL)
10829 return FALSE;
10830
10831 /* Make a note of the offset within the stubs for this entry. */
10832 stub_entry->stub_offset = stub_entry->group->stub_sec->size;
10833 loc = stub_entry->group->stub_sec->contents + stub_entry->stub_offset;
10834
10835 htab->stub_count[stub_entry->stub_type - 1] += 1;
10836 switch (stub_entry->stub_type)
10837 {
10838 case ppc_stub_long_branch:
10839 case ppc_stub_long_branch_r2off:
10840 /* Branches are relative. This is where we are going to. */
10841 dest = (stub_entry->target_value
10842 + stub_entry->target_section->output_offset
10843 + stub_entry->target_section->output_section->vma);
10844 dest += PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
10845 off = dest;
10846
10847 /* And this is where we are coming from. */
10848 off -= (stub_entry->stub_offset
10849 + stub_entry->group->stub_sec->output_offset
10850 + stub_entry->group->stub_sec->output_section->vma);
10851
10852 size = 4;
10853 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
10854 {
10855 bfd_vma r2off = get_r2off (info, stub_entry);
10856
10857 if (r2off == (bfd_vma) -1)
10858 {
10859 htab->stub_error = TRUE;
10860 return FALSE;
10861 }
10862 bfd_put_32 (htab->params->stub_bfd, STD_R2_0R1 + STK_TOC (htab), loc);
10863 loc += 4;
10864 size = 8;
10865 if (PPC_HA (r2off) != 0)
10866 {
10867 bfd_put_32 (htab->params->stub_bfd,
10868 ADDIS_R2_R2 | PPC_HA (r2off), loc);
10869 loc += 4;
10870 size += 4;
10871 }
10872 if (PPC_LO (r2off) != 0)
10873 {
10874 bfd_put_32 (htab->params->stub_bfd,
10875 ADDI_R2_R2 | PPC_LO (r2off), loc);
10876 loc += 4;
10877 size += 4;
10878 }
10879 off -= size - 4;
10880 }
10881 bfd_put_32 (htab->params->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
10882
10883 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
10884 {
10885 info->callbacks->einfo
10886 (_("%P: long branch stub `%s' offset overflow\n"),
10887 stub_entry->root.string);
10888 htab->stub_error = TRUE;
10889 return FALSE;
10890 }
10891
10892 if (info->emitrelocations)
10893 {
10894 r = get_relocs (stub_entry->group->stub_sec, 1);
10895 if (r == NULL)
10896 return FALSE;
10897 r->r_offset = loc - stub_entry->group->stub_sec->contents;
10898 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
10899 r->r_addend = dest;
10900 if (stub_entry->h != NULL)
10901 {
10902 struct elf_link_hash_entry **hashes;
10903 unsigned long symndx;
10904 struct ppc_link_hash_entry *h;
10905
10906 hashes = elf_sym_hashes (htab->params->stub_bfd);
10907 if (hashes == NULL)
10908 {
10909 bfd_size_type hsize;
10910
10911 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
10912 hashes = bfd_zalloc (htab->params->stub_bfd, hsize);
10913 if (hashes == NULL)
10914 return FALSE;
10915 elf_sym_hashes (htab->params->stub_bfd) = hashes;
10916 htab->stub_globals = 1;
10917 }
10918 symndx = htab->stub_globals++;
10919 h = stub_entry->h;
10920 hashes[symndx] = &h->elf;
10921 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
10922 if (h->oh != NULL && h->oh->is_func)
10923 h = ppc_follow_link (h->oh);
10924 if (h->elf.root.u.def.section != stub_entry->target_section)
10925 /* H is an opd symbol. The addend must be zero. */
10926 r->r_addend = 0;
10927 else
10928 {
10929 off = (h->elf.root.u.def.value
10930 + h->elf.root.u.def.section->output_offset
10931 + h->elf.root.u.def.section->output_section->vma);
10932 r->r_addend -= off;
10933 }
10934 }
10935 }
10936 break;
10937
10938 case ppc_stub_plt_branch:
10939 case ppc_stub_plt_branch_r2off:
10940 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
10941 stub_entry->root.string + 9,
10942 FALSE, FALSE);
10943 if (br_entry == NULL)
10944 {
10945 info->callbacks->einfo (_("%P: can't find branch stub `%s'\n"),
10946 stub_entry->root.string);
10947 htab->stub_error = TRUE;
10948 return FALSE;
10949 }
10950
10951 dest = (stub_entry->target_value
10952 + stub_entry->target_section->output_offset
10953 + stub_entry->target_section->output_section->vma);
10954 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
10955 dest += PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
10956
10957 bfd_put_64 (htab->brlt->owner, dest,
10958 htab->brlt->contents + br_entry->offset);
10959
10960 if (br_entry->iter == htab->stub_iteration)
10961 {
10962 br_entry->iter = 0;
10963
10964 if (htab->relbrlt != NULL)
10965 {
10966 /* Create a reloc for the branch lookup table entry. */
10967 Elf_Internal_Rela rela;
10968 bfd_byte *rl;
10969
10970 rela.r_offset = (br_entry->offset
10971 + htab->brlt->output_offset
10972 + htab->brlt->output_section->vma);
10973 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
10974 rela.r_addend = dest;
10975
10976 rl = htab->relbrlt->contents;
10977 rl += (htab->relbrlt->reloc_count++
10978 * sizeof (Elf64_External_Rela));
10979 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
10980 }
10981 else if (info->emitrelocations)
10982 {
10983 r = get_relocs (htab->brlt, 1);
10984 if (r == NULL)
10985 return FALSE;
10986 /* brlt, being SEC_LINKER_CREATED does not go through the
10987 normal reloc processing. Symbols and offsets are not
10988 translated from input file to output file form, so
10989 set up the offset per the output file. */
10990 r->r_offset = (br_entry->offset
10991 + htab->brlt->output_offset
10992 + htab->brlt->output_section->vma);
10993 r->r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
10994 r->r_addend = dest;
10995 }
10996 }
10997
10998 dest = (br_entry->offset
10999 + htab->brlt->output_offset
11000 + htab->brlt->output_section->vma);
11001
11002 off = (dest
11003 - elf_gp (info->output_bfd)
11004 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11005
11006 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
11007 {
11008 info->callbacks->einfo
11009 (_("%P: linkage table error against `%T'\n"),
11010 stub_entry->root.string);
11011 bfd_set_error (bfd_error_bad_value);
11012 htab->stub_error = TRUE;
11013 return FALSE;
11014 }
11015
11016 if (info->emitrelocations)
11017 {
11018 r = get_relocs (stub_entry->group->stub_sec, 1 + (PPC_HA (off) != 0));
11019 if (r == NULL)
11020 return FALSE;
11021 r[0].r_offset = loc - stub_entry->group->stub_sec->contents;
11022 if (bfd_big_endian (info->output_bfd))
11023 r[0].r_offset += 2;
11024 if (stub_entry->stub_type == ppc_stub_plt_branch_r2off)
11025 r[0].r_offset += 4;
11026 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
11027 r[0].r_addend = dest;
11028 if (PPC_HA (off) != 0)
11029 {
11030 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
11031 r[1].r_offset = r[0].r_offset + 4;
11032 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
11033 r[1].r_addend = r[0].r_addend;
11034 }
11035 }
11036
11037 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
11038 {
11039 if (PPC_HA (off) != 0)
11040 {
11041 size = 16;
11042 bfd_put_32 (htab->params->stub_bfd,
11043 ADDIS_R12_R2 | PPC_HA (off), loc);
11044 loc += 4;
11045 bfd_put_32 (htab->params->stub_bfd,
11046 LD_R12_0R12 | PPC_LO (off), loc);
11047 }
11048 else
11049 {
11050 size = 12;
11051 bfd_put_32 (htab->params->stub_bfd,
11052 LD_R12_0R2 | PPC_LO (off), loc);
11053 }
11054 }
11055 else
11056 {
11057 bfd_vma r2off = get_r2off (info, stub_entry);
11058
11059 if (r2off == (bfd_vma) -1)
11060 {
11061 htab->stub_error = TRUE;
11062 return FALSE;
11063 }
11064
11065 bfd_put_32 (htab->params->stub_bfd, STD_R2_0R1 + STK_TOC (htab), loc);
11066 loc += 4;
11067 size = 16;
11068 if (PPC_HA (off) != 0)
11069 {
11070 size += 4;
11071 bfd_put_32 (htab->params->stub_bfd,
11072 ADDIS_R12_R2 | PPC_HA (off), loc);
11073 loc += 4;
11074 bfd_put_32 (htab->params->stub_bfd,
11075 LD_R12_0R12 | PPC_LO (off), loc);
11076 }
11077 else
11078 bfd_put_32 (htab->params->stub_bfd, LD_R12_0R2 | PPC_LO (off), loc);
11079
11080 if (PPC_HA (r2off) != 0)
11081 {
11082 size += 4;
11083 loc += 4;
11084 bfd_put_32 (htab->params->stub_bfd,
11085 ADDIS_R2_R2 | PPC_HA (r2off), loc);
11086 }
11087 if (PPC_LO (r2off) != 0)
11088 {
11089 size += 4;
11090 loc += 4;
11091 bfd_put_32 (htab->params->stub_bfd,
11092 ADDI_R2_R2 | PPC_LO (r2off), loc);
11093 }
11094 }
11095 loc += 4;
11096 bfd_put_32 (htab->params->stub_bfd, MTCTR_R12, loc);
11097 loc += 4;
11098 bfd_put_32 (htab->params->stub_bfd, BCTR, loc);
11099 break;
11100
11101 case ppc_stub_plt_call:
11102 case ppc_stub_plt_call_r2save:
11103 if (stub_entry->h != NULL
11104 && stub_entry->h->is_func_descriptor
11105 && stub_entry->h->oh != NULL)
11106 {
11107 struct ppc_link_hash_entry *fh = ppc_follow_link (stub_entry->h->oh);
11108
11109 /* If the old-ABI "dot-symbol" is undefined make it weak so
11110 we don't get a link error from RELOC_FOR_GLOBAL_SYMBOL. */
11111 if (fh->elf.root.type == bfd_link_hash_undefined
11112 && (stub_entry->h->elf.root.type == bfd_link_hash_defined
11113 || stub_entry->h->elf.root.type == bfd_link_hash_defweak))
11114 fh->elf.root.type = bfd_link_hash_undefweak;
11115 }
11116
11117 /* Now build the stub. */
11118 dest = stub_entry->plt_ent->plt.offset & ~1;
11119 if (dest >= (bfd_vma) -2)
11120 abort ();
11121
11122 plt = htab->elf.splt;
11123 if (!htab->elf.dynamic_sections_created
11124 || stub_entry->h == NULL
11125 || stub_entry->h->elf.dynindx == -1)
11126 plt = htab->elf.iplt;
11127
11128 dest += plt->output_offset + plt->output_section->vma;
11129
11130 if (stub_entry->h == NULL
11131 && (stub_entry->plt_ent->plt.offset & 1) == 0)
11132 {
11133 Elf_Internal_Rela rela;
11134 bfd_byte *rl;
11135
11136 rela.r_offset = dest;
11137 if (htab->opd_abi)
11138 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
11139 else
11140 rela.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
11141 rela.r_addend = (stub_entry->target_value
11142 + stub_entry->target_section->output_offset
11143 + stub_entry->target_section->output_section->vma);
11144
11145 rl = (htab->elf.irelplt->contents
11146 + (htab->elf.irelplt->reloc_count++
11147 * sizeof (Elf64_External_Rela)));
11148 bfd_elf64_swap_reloca_out (info->output_bfd, &rela, rl);
11149 stub_entry->plt_ent->plt.offset |= 1;
11150 htab->local_ifunc_resolver = 1;
11151 }
11152
11153 off = (dest
11154 - elf_gp (info->output_bfd)
11155 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11156
11157 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
11158 {
11159 info->callbacks->einfo
11160 /* xgettext:c-format */
11161 (_("%P: linkage table error against `%T'\n"),
11162 stub_entry->h != NULL
11163 ? stub_entry->h->elf.root.root.string
11164 : "<local sym>");
11165 bfd_set_error (bfd_error_bad_value);
11166 htab->stub_error = TRUE;
11167 return FALSE;
11168 }
11169
11170 if (htab->params->plt_stub_align != 0)
11171 {
11172 unsigned pad = plt_stub_pad (htab, stub_entry, off);
11173
11174 stub_entry->group->stub_sec->size += pad;
11175 stub_entry->stub_offset = stub_entry->group->stub_sec->size;
11176 loc += pad;
11177 }
11178
11179 r = NULL;
11180 if (info->emitrelocations)
11181 {
11182 r = get_relocs (stub_entry->group->stub_sec,
11183 ((PPC_HA (off) != 0)
11184 + (htab->opd_abi
11185 ? 2 + (htab->params->plt_static_chain
11186 && PPC_HA (off + 16) == PPC_HA (off))
11187 : 1)));
11188 if (r == NULL)
11189 return FALSE;
11190 r[0].r_offset = loc - stub_entry->group->stub_sec->contents;
11191 if (bfd_big_endian (info->output_bfd))
11192 r[0].r_offset += 2;
11193 r[0].r_addend = dest;
11194 }
11195 if (stub_entry->h != NULL
11196 && (stub_entry->h == htab->tls_get_addr_fd
11197 || stub_entry->h == htab->tls_get_addr)
11198 && htab->params->tls_get_addr_opt)
11199 p = build_tls_get_addr_stub (htab, stub_entry, loc, off, r);
11200 else
11201 p = build_plt_stub (htab, stub_entry, loc, off, r);
11202 size = p - loc;
11203 break;
11204
11205 case ppc_stub_save_res:
11206 return TRUE;
11207
11208 default:
11209 BFD_FAIL ();
11210 return FALSE;
11211 }
11212
11213 stub_entry->group->stub_sec->size += size;
11214
11215 if (htab->params->emit_stub_syms)
11216 {
11217 struct elf_link_hash_entry *h;
11218 size_t len1, len2;
11219 char *name;
11220 const char *const stub_str[] = { "long_branch",
11221 "long_branch_r2off",
11222 "plt_branch",
11223 "plt_branch_r2off",
11224 "plt_call",
11225 "plt_call" };
11226
11227 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
11228 len2 = strlen (stub_entry->root.string);
11229 name = bfd_malloc (len1 + len2 + 2);
11230 if (name == NULL)
11231 return FALSE;
11232 memcpy (name, stub_entry->root.string, 9);
11233 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
11234 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
11235 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
11236 if (h == NULL)
11237 return FALSE;
11238 if (h->root.type == bfd_link_hash_new)
11239 {
11240 h->root.type = bfd_link_hash_defined;
11241 h->root.u.def.section = stub_entry->group->stub_sec;
11242 h->root.u.def.value = stub_entry->stub_offset;
11243 h->ref_regular = 1;
11244 h->def_regular = 1;
11245 h->ref_regular_nonweak = 1;
11246 h->forced_local = 1;
11247 h->non_elf = 0;
11248 h->root.linker_def = 1;
11249 }
11250 }
11251
11252 return TRUE;
11253 }
11254
11255 /* As above, but don't actually build the stub. Just bump offset so
11256 we know stub section sizes, and select plt_branch stubs where
11257 long_branch stubs won't do. */
11258
11259 static bfd_boolean
11260 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
11261 {
11262 struct ppc_stub_hash_entry *stub_entry;
11263 struct bfd_link_info *info;
11264 struct ppc_link_hash_table *htab;
11265 bfd_vma off;
11266 int size;
11267
11268 /* Massage our args to the form they really have. */
11269 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
11270 info = in_arg;
11271
11272 htab = ppc_hash_table (info);
11273 if (htab == NULL)
11274 return FALSE;
11275
11276 if (stub_entry->h != NULL
11277 && stub_entry->h->save_res
11278 && stub_entry->h->elf.root.type == bfd_link_hash_defined
11279 && stub_entry->h->elf.root.u.def.section == htab->sfpr)
11280 {
11281 /* Don't make stubs to out-of-line register save/restore
11282 functions. Instead, emit copies of the functions. */
11283 stub_entry->group->needs_save_res = 1;
11284 stub_entry->stub_type = ppc_stub_save_res;
11285 return TRUE;
11286 }
11287
11288 if (stub_entry->stub_type == ppc_stub_plt_call
11289 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
11290 {
11291 asection *plt;
11292 off = stub_entry->plt_ent->plt.offset & ~(bfd_vma) 1;
11293 if (off >= (bfd_vma) -2)
11294 abort ();
11295 plt = htab->elf.splt;
11296 if (!htab->elf.dynamic_sections_created
11297 || stub_entry->h == NULL
11298 || stub_entry->h->elf.dynindx == -1)
11299 plt = htab->elf.iplt;
11300 off += (plt->output_offset
11301 + plt->output_section->vma
11302 - elf_gp (info->output_bfd)
11303 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11304
11305 size = plt_stub_size (htab, stub_entry, off);
11306 if (stub_entry->h != NULL
11307 && (stub_entry->h == htab->tls_get_addr_fd
11308 || stub_entry->h == htab->tls_get_addr)
11309 && htab->params->tls_get_addr_opt
11310 && (ALWAYS_EMIT_R2SAVE
11311 || stub_entry->stub_type == ppc_stub_plt_call_r2save))
11312 stub_entry->group->tls_get_addr_opt_bctrl
11313 = stub_entry->group->stub_sec->size + size - 5 * 4;
11314
11315 if (htab->params->plt_stub_align)
11316 size += plt_stub_pad (htab, stub_entry, off);
11317 if (info->emitrelocations)
11318 {
11319 stub_entry->group->stub_sec->reloc_count
11320 += ((PPC_HA (off) != 0)
11321 + (htab->opd_abi
11322 ? 2 + (htab->params->plt_static_chain
11323 && PPC_HA (off + 16) == PPC_HA (off))
11324 : 1));
11325 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11326 }
11327 }
11328 else
11329 {
11330 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
11331 variants. */
11332 bfd_vma r2off = 0;
11333 bfd_vma local_off = 0;
11334
11335 off = (stub_entry->target_value
11336 + stub_entry->target_section->output_offset
11337 + stub_entry->target_section->output_section->vma);
11338 off -= (stub_entry->group->stub_sec->size
11339 + stub_entry->group->stub_sec->output_offset
11340 + stub_entry->group->stub_sec->output_section->vma);
11341
11342 /* Reset the stub type from the plt variant in case we now
11343 can reach with a shorter stub. */
11344 if (stub_entry->stub_type >= ppc_stub_plt_branch)
11345 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
11346
11347 size = 4;
11348 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
11349 {
11350 r2off = get_r2off (info, stub_entry);
11351 if (r2off == (bfd_vma) -1)
11352 {
11353 htab->stub_error = TRUE;
11354 return FALSE;
11355 }
11356 size = 8;
11357 if (PPC_HA (r2off) != 0)
11358 size += 4;
11359 if (PPC_LO (r2off) != 0)
11360 size += 4;
11361 off -= size - 4;
11362 }
11363
11364 local_off = PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
11365
11366 /* If the branch offset if too big, use a ppc_stub_plt_branch.
11367 Do the same for -R objects without function descriptors. */
11368 if (off + (1 << 25) >= (bfd_vma) (1 << 26) - local_off
11369 || (stub_entry->stub_type == ppc_stub_long_branch_r2off
11370 && r2off == 0
11371 && htab->sec_info[stub_entry->target_section->id].toc_off == 0))
11372 {
11373 struct ppc_branch_hash_entry *br_entry;
11374
11375 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
11376 stub_entry->root.string + 9,
11377 TRUE, FALSE);
11378 if (br_entry == NULL)
11379 {
11380 info->callbacks->einfo (_("%P: can't build branch stub `%s'\n"),
11381 stub_entry->root.string);
11382 htab->stub_error = TRUE;
11383 return FALSE;
11384 }
11385
11386 if (br_entry->iter != htab->stub_iteration)
11387 {
11388 br_entry->iter = htab->stub_iteration;
11389 br_entry->offset = htab->brlt->size;
11390 htab->brlt->size += 8;
11391
11392 if (htab->relbrlt != NULL)
11393 htab->relbrlt->size += sizeof (Elf64_External_Rela);
11394 else if (info->emitrelocations)
11395 {
11396 htab->brlt->reloc_count += 1;
11397 htab->brlt->flags |= SEC_RELOC;
11398 }
11399 }
11400
11401 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
11402 off = (br_entry->offset
11403 + htab->brlt->output_offset
11404 + htab->brlt->output_section->vma
11405 - elf_gp (info->output_bfd)
11406 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11407
11408 if (info->emitrelocations)
11409 {
11410 stub_entry->group->stub_sec->reloc_count
11411 += 1 + (PPC_HA (off) != 0);
11412 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11413 }
11414
11415 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
11416 {
11417 size = 12;
11418 if (PPC_HA (off) != 0)
11419 size = 16;
11420 }
11421 else
11422 {
11423 size = 16;
11424 if (PPC_HA (off) != 0)
11425 size += 4;
11426
11427 if (PPC_HA (r2off) != 0)
11428 size += 4;
11429 if (PPC_LO (r2off) != 0)
11430 size += 4;
11431 }
11432 }
11433 else if (info->emitrelocations)
11434 {
11435 stub_entry->group->stub_sec->reloc_count += 1;
11436 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11437 }
11438 }
11439
11440 stub_entry->group->stub_sec->size += size;
11441 return TRUE;
11442 }
11443
11444 /* Set up various things so that we can make a list of input sections
11445 for each output section included in the link. Returns -1 on error,
11446 0 when no stubs will be needed, and 1 on success. */
11447
11448 int
11449 ppc64_elf_setup_section_lists (struct bfd_link_info *info)
11450 {
11451 unsigned int id;
11452 bfd_size_type amt;
11453 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11454
11455 if (htab == NULL)
11456 return -1;
11457
11458 htab->sec_info_arr_size = bfd_get_next_section_id ();
11459 amt = sizeof (*htab->sec_info) * (htab->sec_info_arr_size);
11460 htab->sec_info = bfd_zmalloc (amt);
11461 if (htab->sec_info == NULL)
11462 return -1;
11463
11464 /* Set toc_off for com, und, abs and ind sections. */
11465 for (id = 0; id < 3; id++)
11466 htab->sec_info[id].toc_off = TOC_BASE_OFF;
11467
11468 return 1;
11469 }
11470
11471 /* Set up for first pass at multitoc partitioning. */
11472
11473 void
11474 ppc64_elf_start_multitoc_partition (struct bfd_link_info *info)
11475 {
11476 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11477
11478 htab->toc_curr = ppc64_elf_set_toc (info, info->output_bfd);
11479 htab->toc_bfd = NULL;
11480 htab->toc_first_sec = NULL;
11481 }
11482
11483 /* The linker repeatedly calls this function for each TOC input section
11484 and linker generated GOT section. Group input bfds such that the toc
11485 within a group is less than 64k in size. */
11486
11487 bfd_boolean
11488 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
11489 {
11490 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11491 bfd_vma addr, off, limit;
11492
11493 if (htab == NULL)
11494 return FALSE;
11495
11496 if (!htab->second_toc_pass)
11497 {
11498 /* Keep track of the first .toc or .got section for this input bfd. */
11499 bfd_boolean new_bfd = htab->toc_bfd != isec->owner;
11500
11501 if (new_bfd)
11502 {
11503 htab->toc_bfd = isec->owner;
11504 htab->toc_first_sec = isec;
11505 }
11506
11507 addr = isec->output_offset + isec->output_section->vma;
11508 off = addr - htab->toc_curr;
11509 limit = 0x80008000;
11510 if (ppc64_elf_tdata (isec->owner)->has_small_toc_reloc)
11511 limit = 0x10000;
11512 if (off + isec->size > limit)
11513 {
11514 addr = (htab->toc_first_sec->output_offset
11515 + htab->toc_first_sec->output_section->vma);
11516 htab->toc_curr = addr;
11517 htab->toc_curr &= -TOC_BASE_ALIGN;
11518 }
11519
11520 /* toc_curr is the base address of this toc group. Set elf_gp
11521 for the input section to be the offset relative to the
11522 output toc base plus 0x8000. Making the input elf_gp an
11523 offset allows us to move the toc as a whole without
11524 recalculating input elf_gp. */
11525 off = htab->toc_curr - elf_gp (info->output_bfd);
11526 off += TOC_BASE_OFF;
11527
11528 /* Die if someone uses a linker script that doesn't keep input
11529 file .toc and .got together. */
11530 if (new_bfd
11531 && elf_gp (isec->owner) != 0
11532 && elf_gp (isec->owner) != off)
11533 return FALSE;
11534
11535 elf_gp (isec->owner) = off;
11536 return TRUE;
11537 }
11538
11539 /* During the second pass toc_first_sec points to the start of
11540 a toc group, and toc_curr is used to track the old elf_gp.
11541 We use toc_bfd to ensure we only look at each bfd once. */
11542 if (htab->toc_bfd == isec->owner)
11543 return TRUE;
11544 htab->toc_bfd = isec->owner;
11545
11546 if (htab->toc_first_sec == NULL
11547 || htab->toc_curr != elf_gp (isec->owner))
11548 {
11549 htab->toc_curr = elf_gp (isec->owner);
11550 htab->toc_first_sec = isec;
11551 }
11552 addr = (htab->toc_first_sec->output_offset
11553 + htab->toc_first_sec->output_section->vma);
11554 off = addr - elf_gp (info->output_bfd) + TOC_BASE_OFF;
11555 elf_gp (isec->owner) = off;
11556
11557 return TRUE;
11558 }
11559
11560 /* Called via elf_link_hash_traverse to merge GOT entries for global
11561 symbol H. */
11562
11563 static bfd_boolean
11564 merge_global_got (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
11565 {
11566 if (h->root.type == bfd_link_hash_indirect)
11567 return TRUE;
11568
11569 merge_got_entries (&h->got.glist);
11570
11571 return TRUE;
11572 }
11573
11574 /* Called via elf_link_hash_traverse to allocate GOT entries for global
11575 symbol H. */
11576
11577 static bfd_boolean
11578 reallocate_got (struct elf_link_hash_entry *h, void *inf)
11579 {
11580 struct got_entry *gent;
11581
11582 if (h->root.type == bfd_link_hash_indirect)
11583 return TRUE;
11584
11585 for (gent = h->got.glist; gent != NULL; gent = gent->next)
11586 if (!gent->is_indirect)
11587 allocate_got (h, (struct bfd_link_info *) inf, gent);
11588 return TRUE;
11589 }
11590
11591 /* Called on the first multitoc pass after the last call to
11592 ppc64_elf_next_toc_section. This function removes duplicate GOT
11593 entries. */
11594
11595 bfd_boolean
11596 ppc64_elf_layout_multitoc (struct bfd_link_info *info)
11597 {
11598 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11599 struct bfd *ibfd, *ibfd2;
11600 bfd_boolean done_something;
11601
11602 htab->multi_toc_needed = htab->toc_curr != elf_gp (info->output_bfd);
11603
11604 if (!htab->do_multi_toc)
11605 return FALSE;
11606
11607 /* Merge global sym got entries within a toc group. */
11608 elf_link_hash_traverse (&htab->elf, merge_global_got, info);
11609
11610 /* And tlsld_got. */
11611 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11612 {
11613 struct got_entry *ent, *ent2;
11614
11615 if (!is_ppc64_elf (ibfd))
11616 continue;
11617
11618 ent = ppc64_tlsld_got (ibfd);
11619 if (!ent->is_indirect
11620 && ent->got.offset != (bfd_vma) -1)
11621 {
11622 for (ibfd2 = ibfd->link.next; ibfd2 != NULL; ibfd2 = ibfd2->link.next)
11623 {
11624 if (!is_ppc64_elf (ibfd2))
11625 continue;
11626
11627 ent2 = ppc64_tlsld_got (ibfd2);
11628 if (!ent2->is_indirect
11629 && ent2->got.offset != (bfd_vma) -1
11630 && elf_gp (ibfd2) == elf_gp (ibfd))
11631 {
11632 ent2->is_indirect = TRUE;
11633 ent2->got.ent = ent;
11634 }
11635 }
11636 }
11637 }
11638
11639 /* Zap sizes of got sections. */
11640 htab->elf.irelplt->rawsize = htab->elf.irelplt->size;
11641 htab->elf.irelplt->size -= htab->got_reli_size;
11642 htab->got_reli_size = 0;
11643
11644 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11645 {
11646 asection *got, *relgot;
11647
11648 if (!is_ppc64_elf (ibfd))
11649 continue;
11650
11651 got = ppc64_elf_tdata (ibfd)->got;
11652 if (got != NULL)
11653 {
11654 got->rawsize = got->size;
11655 got->size = 0;
11656 relgot = ppc64_elf_tdata (ibfd)->relgot;
11657 relgot->rawsize = relgot->size;
11658 relgot->size = 0;
11659 }
11660 }
11661
11662 /* Now reallocate the got, local syms first. We don't need to
11663 allocate section contents again since we never increase size. */
11664 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11665 {
11666 struct got_entry **lgot_ents;
11667 struct got_entry **end_lgot_ents;
11668 struct plt_entry **local_plt;
11669 struct plt_entry **end_local_plt;
11670 unsigned char *lgot_masks;
11671 bfd_size_type locsymcount;
11672 Elf_Internal_Shdr *symtab_hdr;
11673 asection *s;
11674
11675 if (!is_ppc64_elf (ibfd))
11676 continue;
11677
11678 lgot_ents = elf_local_got_ents (ibfd);
11679 if (!lgot_ents)
11680 continue;
11681
11682 symtab_hdr = &elf_symtab_hdr (ibfd);
11683 locsymcount = symtab_hdr->sh_info;
11684 end_lgot_ents = lgot_ents + locsymcount;
11685 local_plt = (struct plt_entry **) end_lgot_ents;
11686 end_local_plt = local_plt + locsymcount;
11687 lgot_masks = (unsigned char *) end_local_plt;
11688 s = ppc64_elf_tdata (ibfd)->got;
11689 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
11690 {
11691 struct got_entry *ent;
11692
11693 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
11694 {
11695 unsigned int ent_size = 8;
11696 unsigned int rel_size = sizeof (Elf64_External_Rela);
11697
11698 ent->got.offset = s->size;
11699 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
11700 {
11701 ent_size *= 2;
11702 rel_size *= 2;
11703 }
11704 s->size += ent_size;
11705 if ((*lgot_masks & PLT_IFUNC) != 0)
11706 {
11707 htab->elf.irelplt->size += rel_size;
11708 htab->got_reli_size += rel_size;
11709 }
11710 else if (bfd_link_pic (info))
11711 {
11712 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
11713 srel->size += rel_size;
11714 }
11715 }
11716 }
11717 }
11718
11719 elf_link_hash_traverse (&htab->elf, reallocate_got, info);
11720
11721 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11722 {
11723 struct got_entry *ent;
11724
11725 if (!is_ppc64_elf (ibfd))
11726 continue;
11727
11728 ent = ppc64_tlsld_got (ibfd);
11729 if (!ent->is_indirect
11730 && ent->got.offset != (bfd_vma) -1)
11731 {
11732 asection *s = ppc64_elf_tdata (ibfd)->got;
11733 ent->got.offset = s->size;
11734 s->size += 16;
11735 if (bfd_link_pic (info))
11736 {
11737 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
11738 srel->size += sizeof (Elf64_External_Rela);
11739 }
11740 }
11741 }
11742
11743 done_something = htab->elf.irelplt->rawsize != htab->elf.irelplt->size;
11744 if (!done_something)
11745 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11746 {
11747 asection *got;
11748
11749 if (!is_ppc64_elf (ibfd))
11750 continue;
11751
11752 got = ppc64_elf_tdata (ibfd)->got;
11753 if (got != NULL)
11754 {
11755 done_something = got->rawsize != got->size;
11756 if (done_something)
11757 break;
11758 }
11759 }
11760
11761 if (done_something)
11762 (*htab->params->layout_sections_again) ();
11763
11764 /* Set up for second pass over toc sections to recalculate elf_gp
11765 on input sections. */
11766 htab->toc_bfd = NULL;
11767 htab->toc_first_sec = NULL;
11768 htab->second_toc_pass = TRUE;
11769 return done_something;
11770 }
11771
11772 /* Called after second pass of multitoc partitioning. */
11773
11774 void
11775 ppc64_elf_finish_multitoc_partition (struct bfd_link_info *info)
11776 {
11777 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11778
11779 /* After the second pass, toc_curr tracks the TOC offset used
11780 for code sections below in ppc64_elf_next_input_section. */
11781 htab->toc_curr = TOC_BASE_OFF;
11782 }
11783
11784 /* No toc references were found in ISEC. If the code in ISEC makes no
11785 calls, then there's no need to use toc adjusting stubs when branching
11786 into ISEC. Actually, indirect calls from ISEC are OK as they will
11787 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
11788 needed, and 2 if a cyclical call-graph was found but no other reason
11789 for a stub was detected. If called from the top level, a return of
11790 2 means the same as a return of 0. */
11791
11792 static int
11793 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
11794 {
11795 int ret;
11796
11797 /* Mark this section as checked. */
11798 isec->call_check_done = 1;
11799
11800 /* We know none of our code bearing sections will need toc stubs. */
11801 if ((isec->flags & SEC_LINKER_CREATED) != 0)
11802 return 0;
11803
11804 if (isec->size == 0)
11805 return 0;
11806
11807 if (isec->output_section == NULL)
11808 return 0;
11809
11810 ret = 0;
11811 if (isec->reloc_count != 0)
11812 {
11813 Elf_Internal_Rela *relstart, *rel;
11814 Elf_Internal_Sym *local_syms;
11815 struct ppc_link_hash_table *htab;
11816
11817 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
11818 info->keep_memory);
11819 if (relstart == NULL)
11820 return -1;
11821
11822 /* Look for branches to outside of this section. */
11823 local_syms = NULL;
11824 htab = ppc_hash_table (info);
11825 if (htab == NULL)
11826 return -1;
11827
11828 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
11829 {
11830 enum elf_ppc64_reloc_type r_type;
11831 unsigned long r_symndx;
11832 struct elf_link_hash_entry *h;
11833 struct ppc_link_hash_entry *eh;
11834 Elf_Internal_Sym *sym;
11835 asection *sym_sec;
11836 struct _opd_sec_data *opd;
11837 bfd_vma sym_value;
11838 bfd_vma dest;
11839
11840 r_type = ELF64_R_TYPE (rel->r_info);
11841 if (r_type != R_PPC64_REL24
11842 && r_type != R_PPC64_REL14
11843 && r_type != R_PPC64_REL14_BRTAKEN
11844 && r_type != R_PPC64_REL14_BRNTAKEN)
11845 continue;
11846
11847 r_symndx = ELF64_R_SYM (rel->r_info);
11848 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
11849 isec->owner))
11850 {
11851 ret = -1;
11852 break;
11853 }
11854
11855 /* Calls to dynamic lib functions go through a plt call stub
11856 that uses r2. */
11857 eh = (struct ppc_link_hash_entry *) h;
11858 if (eh != NULL
11859 && (eh->elf.plt.plist != NULL
11860 || (eh->oh != NULL
11861 && ppc_follow_link (eh->oh)->elf.plt.plist != NULL)))
11862 {
11863 ret = 1;
11864 break;
11865 }
11866
11867 if (sym_sec == NULL)
11868 /* Ignore other undefined symbols. */
11869 continue;
11870
11871 /* Assume branches to other sections not included in the
11872 link need stubs too, to cover -R and absolute syms. */
11873 if (sym_sec->output_section == NULL)
11874 {
11875 ret = 1;
11876 break;
11877 }
11878
11879 if (h == NULL)
11880 sym_value = sym->st_value;
11881 else
11882 {
11883 if (h->root.type != bfd_link_hash_defined
11884 && h->root.type != bfd_link_hash_defweak)
11885 abort ();
11886 sym_value = h->root.u.def.value;
11887 }
11888 sym_value += rel->r_addend;
11889
11890 /* If this branch reloc uses an opd sym, find the code section. */
11891 opd = get_opd_info (sym_sec);
11892 if (opd != NULL)
11893 {
11894 if (h == NULL && opd->adjust != NULL)
11895 {
11896 long adjust;
11897
11898 adjust = opd->adjust[OPD_NDX (sym_value)];
11899 if (adjust == -1)
11900 /* Assume deleted functions won't ever be called. */
11901 continue;
11902 sym_value += adjust;
11903 }
11904
11905 dest = opd_entry_value (sym_sec, sym_value,
11906 &sym_sec, NULL, FALSE);
11907 if (dest == (bfd_vma) -1)
11908 continue;
11909 }
11910 else
11911 dest = (sym_value
11912 + sym_sec->output_offset
11913 + sym_sec->output_section->vma);
11914
11915 /* Ignore branch to self. */
11916 if (sym_sec == isec)
11917 continue;
11918
11919 /* If the called function uses the toc, we need a stub. */
11920 if (sym_sec->has_toc_reloc
11921 || sym_sec->makes_toc_func_call)
11922 {
11923 ret = 1;
11924 break;
11925 }
11926
11927 /* Assume any branch that needs a long branch stub might in fact
11928 need a plt_branch stub. A plt_branch stub uses r2. */
11929 else if (dest - (isec->output_offset
11930 + isec->output_section->vma
11931 + rel->r_offset) + (1 << 25)
11932 >= (2u << 25) - PPC64_LOCAL_ENTRY_OFFSET (h
11933 ? h->other
11934 : sym->st_other))
11935 {
11936 ret = 1;
11937 break;
11938 }
11939
11940 /* If calling back to a section in the process of being
11941 tested, we can't say for sure that no toc adjusting stubs
11942 are needed, so don't return zero. */
11943 else if (sym_sec->call_check_in_progress)
11944 ret = 2;
11945
11946 /* Branches to another section that itself doesn't have any TOC
11947 references are OK. Recursively call ourselves to check. */
11948 else if (!sym_sec->call_check_done)
11949 {
11950 int recur;
11951
11952 /* Mark current section as indeterminate, so that other
11953 sections that call back to current won't be marked as
11954 known. */
11955 isec->call_check_in_progress = 1;
11956 recur = toc_adjusting_stub_needed (info, sym_sec);
11957 isec->call_check_in_progress = 0;
11958
11959 if (recur != 0)
11960 {
11961 ret = recur;
11962 if (recur != 2)
11963 break;
11964 }
11965 }
11966 }
11967
11968 if (local_syms != NULL
11969 && (elf_symtab_hdr (isec->owner).contents
11970 != (unsigned char *) local_syms))
11971 free (local_syms);
11972 if (elf_section_data (isec)->relocs != relstart)
11973 free (relstart);
11974 }
11975
11976 if ((ret & 1) == 0
11977 && isec->map_head.s != NULL
11978 && (strcmp (isec->output_section->name, ".init") == 0
11979 || strcmp (isec->output_section->name, ".fini") == 0))
11980 {
11981 if (isec->map_head.s->has_toc_reloc
11982 || isec->map_head.s->makes_toc_func_call)
11983 ret = 1;
11984 else if (!isec->map_head.s->call_check_done)
11985 {
11986 int recur;
11987 isec->call_check_in_progress = 1;
11988 recur = toc_adjusting_stub_needed (info, isec->map_head.s);
11989 isec->call_check_in_progress = 0;
11990 if (recur != 0)
11991 ret = recur;
11992 }
11993 }
11994
11995 if (ret == 1)
11996 isec->makes_toc_func_call = 1;
11997
11998 return ret;
11999 }
12000
12001 /* The linker repeatedly calls this function for each input section,
12002 in the order that input sections are linked into output sections.
12003 Build lists of input sections to determine groupings between which
12004 we may insert linker stubs. */
12005
12006 bfd_boolean
12007 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
12008 {
12009 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12010
12011 if (htab == NULL)
12012 return FALSE;
12013
12014 if ((isec->output_section->flags & SEC_CODE) != 0
12015 && isec->output_section->id < htab->sec_info_arr_size)
12016 {
12017 /* This happens to make the list in reverse order,
12018 which is what we want. */
12019 htab->sec_info[isec->id].u.list
12020 = htab->sec_info[isec->output_section->id].u.list;
12021 htab->sec_info[isec->output_section->id].u.list = isec;
12022 }
12023
12024 if (htab->multi_toc_needed)
12025 {
12026 /* Analyse sections that aren't already flagged as needing a
12027 valid toc pointer. Exclude .fixup for the linux kernel.
12028 .fixup contains branches, but only back to the function that
12029 hit an exception. */
12030 if (!(isec->has_toc_reloc
12031 || (isec->flags & SEC_CODE) == 0
12032 || strcmp (isec->name, ".fixup") == 0
12033 || isec->call_check_done))
12034 {
12035 if (toc_adjusting_stub_needed (info, isec) < 0)
12036 return FALSE;
12037 }
12038 /* Make all sections use the TOC assigned for this object file.
12039 This will be wrong for pasted sections; We fix that in
12040 check_pasted_section(). */
12041 if (elf_gp (isec->owner) != 0)
12042 htab->toc_curr = elf_gp (isec->owner);
12043 }
12044
12045 htab->sec_info[isec->id].toc_off = htab->toc_curr;
12046 return TRUE;
12047 }
12048
12049 /* Check that all .init and .fini sections use the same toc, if they
12050 have toc relocs. */
12051
12052 static bfd_boolean
12053 check_pasted_section (struct bfd_link_info *info, const char *name)
12054 {
12055 asection *o = bfd_get_section_by_name (info->output_bfd, name);
12056
12057 if (o != NULL)
12058 {
12059 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12060 bfd_vma toc_off = 0;
12061 asection *i;
12062
12063 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
12064 if (i->has_toc_reloc)
12065 {
12066 if (toc_off == 0)
12067 toc_off = htab->sec_info[i->id].toc_off;
12068 else if (toc_off != htab->sec_info[i->id].toc_off)
12069 return FALSE;
12070 }
12071
12072 if (toc_off == 0)
12073 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
12074 if (i->makes_toc_func_call)
12075 {
12076 toc_off = htab->sec_info[i->id].toc_off;
12077 break;
12078 }
12079
12080 /* Make sure the whole pasted function uses the same toc offset. */
12081 if (toc_off != 0)
12082 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
12083 htab->sec_info[i->id].toc_off = toc_off;
12084 }
12085 return TRUE;
12086 }
12087
12088 bfd_boolean
12089 ppc64_elf_check_init_fini (struct bfd_link_info *info)
12090 {
12091 return (check_pasted_section (info, ".init")
12092 & check_pasted_section (info, ".fini"));
12093 }
12094
12095 /* See whether we can group stub sections together. Grouping stub
12096 sections may result in fewer stubs. More importantly, we need to
12097 put all .init* and .fini* stubs at the beginning of the .init or
12098 .fini output sections respectively, because glibc splits the
12099 _init and _fini functions into multiple parts. Putting a stub in
12100 the middle of a function is not a good idea. */
12101
12102 static bfd_boolean
12103 group_sections (struct bfd_link_info *info,
12104 bfd_size_type stub_group_size,
12105 bfd_boolean stubs_always_before_branch)
12106 {
12107 struct ppc_link_hash_table *htab;
12108 asection *osec;
12109 bfd_boolean suppress_size_errors;
12110
12111 htab = ppc_hash_table (info);
12112 if (htab == NULL)
12113 return FALSE;
12114
12115 suppress_size_errors = FALSE;
12116 if (stub_group_size == 1)
12117 {
12118 /* Default values. */
12119 if (stubs_always_before_branch)
12120 stub_group_size = 0x1e00000;
12121 else
12122 stub_group_size = 0x1c00000;
12123 suppress_size_errors = TRUE;
12124 }
12125
12126 for (osec = info->output_bfd->sections; osec != NULL; osec = osec->next)
12127 {
12128 asection *tail;
12129
12130 if (osec->id >= htab->sec_info_arr_size)
12131 continue;
12132
12133 tail = htab->sec_info[osec->id].u.list;
12134 while (tail != NULL)
12135 {
12136 asection *curr;
12137 asection *prev;
12138 bfd_size_type total;
12139 bfd_boolean big_sec;
12140 bfd_vma curr_toc;
12141 struct map_stub *group;
12142 bfd_size_type group_size;
12143
12144 curr = tail;
12145 total = tail->size;
12146 group_size = (ppc64_elf_section_data (tail) != NULL
12147 && ppc64_elf_section_data (tail)->has_14bit_branch
12148 ? stub_group_size >> 10 : stub_group_size);
12149
12150 big_sec = total > group_size;
12151 if (big_sec && !suppress_size_errors)
12152 /* xgettext:c-format */
12153 _bfd_error_handler (_("%B section %A exceeds stub group size"),
12154 tail->owner, tail);
12155 curr_toc = htab->sec_info[tail->id].toc_off;
12156
12157 while ((prev = htab->sec_info[curr->id].u.list) != NULL
12158 && ((total += curr->output_offset - prev->output_offset)
12159 < (ppc64_elf_section_data (prev) != NULL
12160 && ppc64_elf_section_data (prev)->has_14bit_branch
12161 ? (group_size = stub_group_size >> 10) : group_size))
12162 && htab->sec_info[prev->id].toc_off == curr_toc)
12163 curr = prev;
12164
12165 /* OK, the size from the start of CURR to the end is less
12166 than group_size and thus can be handled by one stub
12167 section. (or the tail section is itself larger than
12168 group_size, in which case we may be toast.) We should
12169 really be keeping track of the total size of stubs added
12170 here, as stubs contribute to the final output section
12171 size. That's a little tricky, and this way will only
12172 break if stubs added make the total size more than 2^25,
12173 ie. for the default stub_group_size, if stubs total more
12174 than 2097152 bytes, or nearly 75000 plt call stubs. */
12175 group = bfd_alloc (curr->owner, sizeof (*group));
12176 if (group == NULL)
12177 return FALSE;
12178 group->link_sec = curr;
12179 group->stub_sec = NULL;
12180 group->needs_save_res = 0;
12181 group->tls_get_addr_opt_bctrl = -1u;
12182 group->next = htab->group;
12183 htab->group = group;
12184 do
12185 {
12186 prev = htab->sec_info[tail->id].u.list;
12187 /* Set up this stub group. */
12188 htab->sec_info[tail->id].u.group = group;
12189 }
12190 while (tail != curr && (tail = prev) != NULL);
12191
12192 /* But wait, there's more! Input sections up to group_size
12193 bytes before the stub section can be handled by it too.
12194 Don't do this if we have a really large section after the
12195 stubs, as adding more stubs increases the chance that
12196 branches may not reach into the stub section. */
12197 if (!stubs_always_before_branch && !big_sec)
12198 {
12199 total = 0;
12200 while (prev != NULL
12201 && ((total += tail->output_offset - prev->output_offset)
12202 < (ppc64_elf_section_data (prev) != NULL
12203 && ppc64_elf_section_data (prev)->has_14bit_branch
12204 ? (group_size = stub_group_size >> 10) : group_size))
12205 && htab->sec_info[prev->id].toc_off == curr_toc)
12206 {
12207 tail = prev;
12208 prev = htab->sec_info[tail->id].u.list;
12209 htab->sec_info[tail->id].u.group = group;
12210 }
12211 }
12212 tail = prev;
12213 }
12214 }
12215 return TRUE;
12216 }
12217
12218 static const unsigned char glink_eh_frame_cie[] =
12219 {
12220 0, 0, 0, 16, /* length. */
12221 0, 0, 0, 0, /* id. */
12222 1, /* CIE version. */
12223 'z', 'R', 0, /* Augmentation string. */
12224 4, /* Code alignment. */
12225 0x78, /* Data alignment. */
12226 65, /* RA reg. */
12227 1, /* Augmentation size. */
12228 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
12229 DW_CFA_def_cfa, 1, 0 /* def_cfa: r1 offset 0. */
12230 };
12231
12232 static size_t
12233 stub_eh_frame_size (struct map_stub *group, size_t align)
12234 {
12235 size_t this_size = 17;
12236 if (group->tls_get_addr_opt_bctrl != -1u)
12237 {
12238 unsigned int to_bctrl = group->tls_get_addr_opt_bctrl / 4;
12239 if (to_bctrl < 64)
12240 this_size += 1;
12241 else if (to_bctrl < 256)
12242 this_size += 2;
12243 else if (to_bctrl < 65536)
12244 this_size += 3;
12245 else
12246 this_size += 5;
12247 this_size += 6;
12248 }
12249 this_size = (this_size + align - 1) & -align;
12250 return this_size;
12251 }
12252
12253 /* Stripping output sections is normally done before dynamic section
12254 symbols have been allocated. This function is called later, and
12255 handles cases like htab->brlt which is mapped to its own output
12256 section. */
12257
12258 static void
12259 maybe_strip_output (struct bfd_link_info *info, asection *isec)
12260 {
12261 if (isec->size == 0
12262 && isec->output_section->size == 0
12263 && !(isec->output_section->flags & SEC_KEEP)
12264 && !bfd_section_removed_from_list (info->output_bfd,
12265 isec->output_section)
12266 && elf_section_data (isec->output_section)->dynindx == 0)
12267 {
12268 isec->output_section->flags |= SEC_EXCLUDE;
12269 bfd_section_list_remove (info->output_bfd, isec->output_section);
12270 info->output_bfd->section_count--;
12271 }
12272 }
12273
12274 /* Determine and set the size of the stub section for a final link.
12275
12276 The basic idea here is to examine all the relocations looking for
12277 PC-relative calls to a target that is unreachable with a "bl"
12278 instruction. */
12279
12280 bfd_boolean
12281 ppc64_elf_size_stubs (struct bfd_link_info *info)
12282 {
12283 bfd_size_type stub_group_size;
12284 bfd_boolean stubs_always_before_branch;
12285 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12286
12287 if (htab == NULL)
12288 return FALSE;
12289
12290 if (htab->params->plt_thread_safe == -1 && !bfd_link_executable (info))
12291 htab->params->plt_thread_safe = 1;
12292 if (!htab->opd_abi)
12293 htab->params->plt_thread_safe = 0;
12294 else if (htab->params->plt_thread_safe == -1)
12295 {
12296 static const char *const thread_starter[] =
12297 {
12298 "pthread_create",
12299 /* libstdc++ */
12300 "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE",
12301 /* librt */
12302 "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio",
12303 "mq_notify", "create_timer",
12304 /* libanl */
12305 "getaddrinfo_a",
12306 /* libgomp */
12307 "GOMP_parallel",
12308 "GOMP_parallel_start",
12309 "GOMP_parallel_loop_static",
12310 "GOMP_parallel_loop_static_start",
12311 "GOMP_parallel_loop_dynamic",
12312 "GOMP_parallel_loop_dynamic_start",
12313 "GOMP_parallel_loop_guided",
12314 "GOMP_parallel_loop_guided_start",
12315 "GOMP_parallel_loop_runtime",
12316 "GOMP_parallel_loop_runtime_start",
12317 "GOMP_parallel_sections",
12318 "GOMP_parallel_sections_start",
12319 /* libgo */
12320 "__go_go",
12321 };
12322 unsigned i;
12323
12324 for (i = 0; i < ARRAY_SIZE (thread_starter); i++)
12325 {
12326 struct elf_link_hash_entry *h;
12327 h = elf_link_hash_lookup (&htab->elf, thread_starter[i],
12328 FALSE, FALSE, TRUE);
12329 htab->params->plt_thread_safe = h != NULL && h->ref_regular;
12330 if (htab->params->plt_thread_safe)
12331 break;
12332 }
12333 }
12334 stubs_always_before_branch = htab->params->group_size < 0;
12335 if (htab->params->group_size < 0)
12336 stub_group_size = -htab->params->group_size;
12337 else
12338 stub_group_size = htab->params->group_size;
12339
12340 if (!group_sections (info, stub_group_size, stubs_always_before_branch))
12341 return FALSE;
12342
12343 #define STUB_SHRINK_ITER 20
12344 /* Loop until no stubs added. After iteration 20 of this loop we may
12345 exit on a stub section shrinking. This is to break out of a
12346 pathological case where adding stubs on one iteration decreases
12347 section gaps (perhaps due to alignment), which then requires
12348 fewer or smaller stubs on the next iteration. */
12349
12350 while (1)
12351 {
12352 bfd *input_bfd;
12353 unsigned int bfd_indx;
12354 struct map_stub *group;
12355
12356 htab->stub_iteration += 1;
12357
12358 for (input_bfd = info->input_bfds, bfd_indx = 0;
12359 input_bfd != NULL;
12360 input_bfd = input_bfd->link.next, bfd_indx++)
12361 {
12362 Elf_Internal_Shdr *symtab_hdr;
12363 asection *section;
12364 Elf_Internal_Sym *local_syms = NULL;
12365
12366 if (!is_ppc64_elf (input_bfd))
12367 continue;
12368
12369 /* We'll need the symbol table in a second. */
12370 symtab_hdr = &elf_symtab_hdr (input_bfd);
12371 if (symtab_hdr->sh_info == 0)
12372 continue;
12373
12374 /* Walk over each section attached to the input bfd. */
12375 for (section = input_bfd->sections;
12376 section != NULL;
12377 section = section->next)
12378 {
12379 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
12380
12381 /* If there aren't any relocs, then there's nothing more
12382 to do. */
12383 if ((section->flags & SEC_RELOC) == 0
12384 || (section->flags & SEC_ALLOC) == 0
12385 || (section->flags & SEC_LOAD) == 0
12386 || (section->flags & SEC_CODE) == 0
12387 || section->reloc_count == 0)
12388 continue;
12389
12390 /* If this section is a link-once section that will be
12391 discarded, then don't create any stubs. */
12392 if (section->output_section == NULL
12393 || section->output_section->owner != info->output_bfd)
12394 continue;
12395
12396 /* Get the relocs. */
12397 internal_relocs
12398 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
12399 info->keep_memory);
12400 if (internal_relocs == NULL)
12401 goto error_ret_free_local;
12402
12403 /* Now examine each relocation. */
12404 irela = internal_relocs;
12405 irelaend = irela + section->reloc_count;
12406 for (; irela < irelaend; irela++)
12407 {
12408 enum elf_ppc64_reloc_type r_type;
12409 unsigned int r_indx;
12410 enum ppc_stub_type stub_type;
12411 struct ppc_stub_hash_entry *stub_entry;
12412 asection *sym_sec, *code_sec;
12413 bfd_vma sym_value, code_value;
12414 bfd_vma destination;
12415 unsigned long local_off;
12416 bfd_boolean ok_dest;
12417 struct ppc_link_hash_entry *hash;
12418 struct ppc_link_hash_entry *fdh;
12419 struct elf_link_hash_entry *h;
12420 Elf_Internal_Sym *sym;
12421 char *stub_name;
12422 const asection *id_sec;
12423 struct _opd_sec_data *opd;
12424 struct plt_entry *plt_ent;
12425
12426 r_type = ELF64_R_TYPE (irela->r_info);
12427 r_indx = ELF64_R_SYM (irela->r_info);
12428
12429 if (r_type >= R_PPC64_max)
12430 {
12431 bfd_set_error (bfd_error_bad_value);
12432 goto error_ret_free_internal;
12433 }
12434
12435 /* Only look for stubs on branch instructions. */
12436 if (r_type != R_PPC64_REL24
12437 && r_type != R_PPC64_REL14
12438 && r_type != R_PPC64_REL14_BRTAKEN
12439 && r_type != R_PPC64_REL14_BRNTAKEN)
12440 continue;
12441
12442 /* Now determine the call target, its name, value,
12443 section. */
12444 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
12445 r_indx, input_bfd))
12446 goto error_ret_free_internal;
12447 hash = (struct ppc_link_hash_entry *) h;
12448
12449 ok_dest = FALSE;
12450 fdh = NULL;
12451 sym_value = 0;
12452 if (hash == NULL)
12453 {
12454 sym_value = sym->st_value;
12455 if (sym_sec != NULL
12456 && sym_sec->output_section != NULL)
12457 ok_dest = TRUE;
12458 }
12459 else if (hash->elf.root.type == bfd_link_hash_defined
12460 || hash->elf.root.type == bfd_link_hash_defweak)
12461 {
12462 sym_value = hash->elf.root.u.def.value;
12463 if (sym_sec->output_section != NULL)
12464 ok_dest = TRUE;
12465 }
12466 else if (hash->elf.root.type == bfd_link_hash_undefweak
12467 || hash->elf.root.type == bfd_link_hash_undefined)
12468 {
12469 /* Recognise an old ABI func code entry sym, and
12470 use the func descriptor sym instead if it is
12471 defined. */
12472 if (hash->elf.root.root.string[0] == '.'
12473 && hash->oh != NULL)
12474 {
12475 fdh = ppc_follow_link (hash->oh);
12476 if (fdh->elf.root.type == bfd_link_hash_defined
12477 || fdh->elf.root.type == bfd_link_hash_defweak)
12478 {
12479 sym_sec = fdh->elf.root.u.def.section;
12480 sym_value = fdh->elf.root.u.def.value;
12481 if (sym_sec->output_section != NULL)
12482 ok_dest = TRUE;
12483 }
12484 else
12485 fdh = NULL;
12486 }
12487 }
12488 else
12489 {
12490 bfd_set_error (bfd_error_bad_value);
12491 goto error_ret_free_internal;
12492 }
12493
12494 destination = 0;
12495 local_off = 0;
12496 if (ok_dest)
12497 {
12498 sym_value += irela->r_addend;
12499 destination = (sym_value
12500 + sym_sec->output_offset
12501 + sym_sec->output_section->vma);
12502 local_off = PPC64_LOCAL_ENTRY_OFFSET (hash
12503 ? hash->elf.other
12504 : sym->st_other);
12505 }
12506
12507 code_sec = sym_sec;
12508 code_value = sym_value;
12509 opd = get_opd_info (sym_sec);
12510 if (opd != NULL)
12511 {
12512 bfd_vma dest;
12513
12514 if (hash == NULL && opd->adjust != NULL)
12515 {
12516 long adjust = opd->adjust[OPD_NDX (sym_value)];
12517 if (adjust == -1)
12518 continue;
12519 code_value += adjust;
12520 sym_value += adjust;
12521 }
12522 dest = opd_entry_value (sym_sec, sym_value,
12523 &code_sec, &code_value, FALSE);
12524 if (dest != (bfd_vma) -1)
12525 {
12526 destination = dest;
12527 if (fdh != NULL)
12528 {
12529 /* Fixup old ABI sym to point at code
12530 entry. */
12531 hash->elf.root.type = bfd_link_hash_defweak;
12532 hash->elf.root.u.def.section = code_sec;
12533 hash->elf.root.u.def.value = code_value;
12534 }
12535 }
12536 }
12537
12538 /* Determine what (if any) linker stub is needed. */
12539 plt_ent = NULL;
12540 stub_type = ppc_type_of_stub (section, irela, &hash,
12541 &plt_ent, destination,
12542 local_off);
12543
12544 if (stub_type != ppc_stub_plt_call)
12545 {
12546 /* Check whether we need a TOC adjusting stub.
12547 Since the linker pastes together pieces from
12548 different object files when creating the
12549 _init and _fini functions, it may be that a
12550 call to what looks like a local sym is in
12551 fact a call needing a TOC adjustment. */
12552 if (code_sec != NULL
12553 && code_sec->output_section != NULL
12554 && (htab->sec_info[code_sec->id].toc_off
12555 != htab->sec_info[section->id].toc_off)
12556 && (code_sec->has_toc_reloc
12557 || code_sec->makes_toc_func_call))
12558 stub_type = ppc_stub_long_branch_r2off;
12559 }
12560
12561 if (stub_type == ppc_stub_none)
12562 continue;
12563
12564 /* __tls_get_addr calls might be eliminated. */
12565 if (stub_type != ppc_stub_plt_call
12566 && hash != NULL
12567 && (hash == htab->tls_get_addr
12568 || hash == htab->tls_get_addr_fd)
12569 && section->has_tls_reloc
12570 && irela != internal_relocs)
12571 {
12572 /* Get tls info. */
12573 unsigned char *tls_mask;
12574
12575 if (!get_tls_mask (&tls_mask, NULL, NULL, &local_syms,
12576 irela - 1, input_bfd))
12577 goto error_ret_free_internal;
12578 if (*tls_mask != 0)
12579 continue;
12580 }
12581
12582 if (stub_type == ppc_stub_plt_call)
12583 {
12584 if (!htab->opd_abi
12585 && htab->params->plt_localentry0 != 0
12586 && is_elfv2_localentry0 (&hash->elf))
12587 htab->has_plt_localentry0 = 1;
12588 else if (irela + 1 < irelaend
12589 && irela[1].r_offset == irela->r_offset + 4
12590 && (ELF64_R_TYPE (irela[1].r_info)
12591 == R_PPC64_TOCSAVE))
12592 {
12593 if (!tocsave_find (htab, INSERT,
12594 &local_syms, irela + 1, input_bfd))
12595 goto error_ret_free_internal;
12596 }
12597 else
12598 stub_type = ppc_stub_plt_call_r2save;
12599 }
12600
12601 /* Support for grouping stub sections. */
12602 id_sec = htab->sec_info[section->id].u.group->link_sec;
12603
12604 /* Get the name of this stub. */
12605 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
12606 if (!stub_name)
12607 goto error_ret_free_internal;
12608
12609 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
12610 stub_name, FALSE, FALSE);
12611 if (stub_entry != NULL)
12612 {
12613 /* The proper stub has already been created. */
12614 free (stub_name);
12615 if (stub_type == ppc_stub_plt_call_r2save)
12616 stub_entry->stub_type = stub_type;
12617 continue;
12618 }
12619
12620 stub_entry = ppc_add_stub (stub_name, section, info);
12621 if (stub_entry == NULL)
12622 {
12623 free (stub_name);
12624 error_ret_free_internal:
12625 if (elf_section_data (section)->relocs == NULL)
12626 free (internal_relocs);
12627 error_ret_free_local:
12628 if (local_syms != NULL
12629 && (symtab_hdr->contents
12630 != (unsigned char *) local_syms))
12631 free (local_syms);
12632 return FALSE;
12633 }
12634
12635 stub_entry->stub_type = stub_type;
12636 if (stub_type != ppc_stub_plt_call
12637 && stub_type != ppc_stub_plt_call_r2save)
12638 {
12639 stub_entry->target_value = code_value;
12640 stub_entry->target_section = code_sec;
12641 }
12642 else
12643 {
12644 stub_entry->target_value = sym_value;
12645 stub_entry->target_section = sym_sec;
12646 }
12647 stub_entry->h = hash;
12648 stub_entry->plt_ent = plt_ent;
12649 stub_entry->other = hash ? hash->elf.other : sym->st_other;
12650
12651 if (stub_entry->h != NULL)
12652 htab->stub_globals += 1;
12653 }
12654
12655 /* We're done with the internal relocs, free them. */
12656 if (elf_section_data (section)->relocs != internal_relocs)
12657 free (internal_relocs);
12658 }
12659
12660 if (local_syms != NULL
12661 && symtab_hdr->contents != (unsigned char *) local_syms)
12662 {
12663 if (!info->keep_memory)
12664 free (local_syms);
12665 else
12666 symtab_hdr->contents = (unsigned char *) local_syms;
12667 }
12668 }
12669
12670 /* We may have added some stubs. Find out the new size of the
12671 stub sections. */
12672 for (group = htab->group; group != NULL; group = group->next)
12673 if (group->stub_sec != NULL)
12674 {
12675 asection *stub_sec = group->stub_sec;
12676
12677 if (htab->stub_iteration <= STUB_SHRINK_ITER
12678 || stub_sec->rawsize < stub_sec->size)
12679 /* Past STUB_SHRINK_ITER, rawsize is the max size seen. */
12680 stub_sec->rawsize = stub_sec->size;
12681 stub_sec->size = 0;
12682 stub_sec->reloc_count = 0;
12683 stub_sec->flags &= ~SEC_RELOC;
12684 }
12685
12686 htab->brlt->size = 0;
12687 htab->brlt->reloc_count = 0;
12688 htab->brlt->flags &= ~SEC_RELOC;
12689 if (htab->relbrlt != NULL)
12690 htab->relbrlt->size = 0;
12691
12692 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
12693
12694 for (group = htab->group; group != NULL; group = group->next)
12695 if (group->needs_save_res)
12696 group->stub_sec->size += htab->sfpr->size;
12697
12698 if (info->emitrelocations
12699 && htab->glink != NULL && htab->glink->size != 0)
12700 {
12701 htab->glink->reloc_count = 1;
12702 htab->glink->flags |= SEC_RELOC;
12703 }
12704
12705 if (htab->glink_eh_frame != NULL
12706 && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
12707 && htab->glink_eh_frame->output_section->size > 8)
12708 {
12709 size_t size = 0, align = 4;
12710
12711 for (group = htab->group; group != NULL; group = group->next)
12712 if (group->stub_sec != NULL)
12713 size += stub_eh_frame_size (group, align);
12714 if (htab->glink != NULL && htab->glink->size != 0)
12715 size += (24 + align - 1) & -align;
12716 if (size != 0)
12717 size += (sizeof (glink_eh_frame_cie) + align - 1) & -align;
12718 align = 1ul << htab->glink_eh_frame->output_section->alignment_power;
12719 size = (size + align - 1) & -align;
12720 htab->glink_eh_frame->rawsize = htab->glink_eh_frame->size;
12721 htab->glink_eh_frame->size = size;
12722 }
12723
12724 if (htab->params->plt_stub_align != 0)
12725 for (group = htab->group; group != NULL; group = group->next)
12726 if (group->stub_sec != NULL)
12727 group->stub_sec->size = ((group->stub_sec->size
12728 + (1 << htab->params->plt_stub_align) - 1)
12729 & -(1 << htab->params->plt_stub_align));
12730
12731 for (group = htab->group; group != NULL; group = group->next)
12732 if (group->stub_sec != NULL
12733 && group->stub_sec->rawsize != group->stub_sec->size
12734 && (htab->stub_iteration <= STUB_SHRINK_ITER
12735 || group->stub_sec->rawsize < group->stub_sec->size))
12736 break;
12737
12738 if (group == NULL
12739 && (htab->glink_eh_frame == NULL
12740 || htab->glink_eh_frame->rawsize == htab->glink_eh_frame->size))
12741 break;
12742
12743 /* Ask the linker to do its stuff. */
12744 (*htab->params->layout_sections_again) ();
12745 }
12746
12747 if (htab->glink_eh_frame != NULL
12748 && htab->glink_eh_frame->size != 0)
12749 {
12750 bfd_vma val;
12751 bfd_byte *p, *last_fde;
12752 size_t last_fde_len, size, align, pad;
12753 struct map_stub *group;
12754
12755 p = bfd_zalloc (htab->glink_eh_frame->owner, htab->glink_eh_frame->size);
12756 if (p == NULL)
12757 return FALSE;
12758 htab->glink_eh_frame->contents = p;
12759 last_fde = p;
12760 align = 4;
12761
12762 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
12763 /* CIE length (rewrite in case little-endian). */
12764 last_fde_len = ((sizeof (glink_eh_frame_cie) + align - 1) & -align) - 4;
12765 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
12766 p += last_fde_len + 4;
12767
12768 for (group = htab->group; group != NULL; group = group->next)
12769 if (group->stub_sec != NULL)
12770 {
12771 last_fde = p;
12772 last_fde_len = stub_eh_frame_size (group, align) - 4;
12773 /* FDE length. */
12774 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
12775 p += 4;
12776 /* CIE pointer. */
12777 val = p - htab->glink_eh_frame->contents;
12778 bfd_put_32 (htab->elf.dynobj, val, p);
12779 p += 4;
12780 /* Offset to stub section, written later. */
12781 p += 4;
12782 /* stub section size. */
12783 bfd_put_32 (htab->elf.dynobj, group->stub_sec->size, p);
12784 p += 4;
12785 /* Augmentation. */
12786 p += 1;
12787 if (group->tls_get_addr_opt_bctrl != -1u)
12788 {
12789 unsigned int to_bctrl = group->tls_get_addr_opt_bctrl / 4;
12790
12791 /* This FDE needs more than just the default.
12792 Describe __tls_get_addr_opt stub LR. */
12793 if (to_bctrl < 64)
12794 *p++ = DW_CFA_advance_loc + to_bctrl;
12795 else if (to_bctrl < 256)
12796 {
12797 *p++ = DW_CFA_advance_loc1;
12798 *p++ = to_bctrl;
12799 }
12800 else if (to_bctrl < 65536)
12801 {
12802 *p++ = DW_CFA_advance_loc2;
12803 bfd_put_16 (htab->elf.dynobj, to_bctrl, p);
12804 p += 2;
12805 }
12806 else
12807 {
12808 *p++ = DW_CFA_advance_loc4;
12809 bfd_put_32 (htab->elf.dynobj, to_bctrl, p);
12810 p += 4;
12811 }
12812 *p++ = DW_CFA_offset_extended_sf;
12813 *p++ = 65;
12814 *p++ = -(STK_LINKER (htab) / 8) & 0x7f;
12815 *p++ = DW_CFA_advance_loc + 4;
12816 *p++ = DW_CFA_restore_extended;
12817 *p++ = 65;
12818 }
12819 /* Pad. */
12820 p = last_fde + last_fde_len + 4;
12821 }
12822 if (htab->glink != NULL && htab->glink->size != 0)
12823 {
12824 last_fde = p;
12825 last_fde_len = ((24 + align - 1) & -align) - 4;
12826 /* FDE length. */
12827 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
12828 p += 4;
12829 /* CIE pointer. */
12830 val = p - htab->glink_eh_frame->contents;
12831 bfd_put_32 (htab->elf.dynobj, val, p);
12832 p += 4;
12833 /* Offset to .glink, written later. */
12834 p += 4;
12835 /* .glink size. */
12836 bfd_put_32 (htab->elf.dynobj, htab->glink->size - 8, p);
12837 p += 4;
12838 /* Augmentation. */
12839 p += 1;
12840
12841 *p++ = DW_CFA_advance_loc + 1;
12842 *p++ = DW_CFA_register;
12843 *p++ = 65;
12844 *p++ = htab->opd_abi ? 12 : 0;
12845 *p++ = DW_CFA_advance_loc + (htab->opd_abi ? 5 : 7);
12846 *p++ = DW_CFA_restore_extended;
12847 *p++ = 65;
12848 p += ((24 + align - 1) & -align) - 24;
12849 }
12850 /* Subsume any padding into the last FDE if user .eh_frame
12851 sections are aligned more than glink_eh_frame. Otherwise any
12852 zero padding will be seen as a terminator. */
12853 align = 1ul << htab->glink_eh_frame->output_section->alignment_power;
12854 size = p - htab->glink_eh_frame->contents;
12855 pad = ((size + align - 1) & -align) - size;
12856 htab->glink_eh_frame->size = size + pad;
12857 bfd_put_32 (htab->elf.dynobj, last_fde_len + pad, last_fde);
12858 }
12859
12860 maybe_strip_output (info, htab->brlt);
12861 if (htab->glink_eh_frame != NULL)
12862 maybe_strip_output (info, htab->glink_eh_frame);
12863
12864 return TRUE;
12865 }
12866
12867 /* Called after we have determined section placement. If sections
12868 move, we'll be called again. Provide a value for TOCstart. */
12869
12870 bfd_vma
12871 ppc64_elf_set_toc (struct bfd_link_info *info, bfd *obfd)
12872 {
12873 asection *s;
12874 bfd_vma TOCstart, adjust;
12875
12876 if (info != NULL)
12877 {
12878 struct elf_link_hash_entry *h;
12879 struct elf_link_hash_table *htab = elf_hash_table (info);
12880
12881 if (is_elf_hash_table (htab)
12882 && htab->hgot != NULL)
12883 h = htab->hgot;
12884 else
12885 {
12886 h = elf_link_hash_lookup (htab, ".TOC.", FALSE, FALSE, TRUE);
12887 if (is_elf_hash_table (htab))
12888 htab->hgot = h;
12889 }
12890 if (h != NULL
12891 && h->root.type == bfd_link_hash_defined
12892 && !h->root.linker_def
12893 && (!is_elf_hash_table (htab)
12894 || h->def_regular))
12895 {
12896 TOCstart = (h->root.u.def.value - TOC_BASE_OFF
12897 + h->root.u.def.section->output_offset
12898 + h->root.u.def.section->output_section->vma);
12899 _bfd_set_gp_value (obfd, TOCstart);
12900 return TOCstart;
12901 }
12902 }
12903
12904 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
12905 order. The TOC starts where the first of these sections starts. */
12906 s = bfd_get_section_by_name (obfd, ".got");
12907 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12908 s = bfd_get_section_by_name (obfd, ".toc");
12909 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12910 s = bfd_get_section_by_name (obfd, ".tocbss");
12911 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12912 s = bfd_get_section_by_name (obfd, ".plt");
12913 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12914 {
12915 /* This may happen for
12916 o references to TOC base (SYM@toc / TOC[tc0]) without a
12917 .toc directive
12918 o bad linker script
12919 o --gc-sections and empty TOC sections
12920
12921 FIXME: Warn user? */
12922
12923 /* Look for a likely section. We probably won't even be
12924 using TOCstart. */
12925 for (s = obfd->sections; s != NULL; s = s->next)
12926 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY
12927 | 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_SMALL_DATA | SEC_EXCLUDE))
12933 == (SEC_ALLOC | SEC_SMALL_DATA))
12934 break;
12935 if (s == NULL)
12936 for (s = obfd->sections; s != NULL; s = s->next)
12937 if ((s->flags & (SEC_ALLOC | SEC_READONLY | SEC_EXCLUDE))
12938 == SEC_ALLOC)
12939 break;
12940 if (s == NULL)
12941 for (s = obfd->sections; s != NULL; s = s->next)
12942 if ((s->flags & (SEC_ALLOC | SEC_EXCLUDE)) == SEC_ALLOC)
12943 break;
12944 }
12945
12946 TOCstart = 0;
12947 if (s != NULL)
12948 TOCstart = s->output_section->vma + s->output_offset;
12949
12950 /* Force alignment. */
12951 adjust = TOCstart & (TOC_BASE_ALIGN - 1);
12952 TOCstart -= adjust;
12953 _bfd_set_gp_value (obfd, TOCstart);
12954
12955 if (info != NULL && s != NULL)
12956 {
12957 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12958
12959 if (htab != NULL)
12960 {
12961 if (htab->elf.hgot != NULL)
12962 {
12963 htab->elf.hgot->root.u.def.value = TOC_BASE_OFF - adjust;
12964 htab->elf.hgot->root.u.def.section = s;
12965 }
12966 }
12967 else
12968 {
12969 struct bfd_link_hash_entry *bh = NULL;
12970 _bfd_generic_link_add_one_symbol (info, obfd, ".TOC.", BSF_GLOBAL,
12971 s, TOC_BASE_OFF - adjust,
12972 NULL, FALSE, FALSE, &bh);
12973 }
12974 }
12975 return TOCstart;
12976 }
12977
12978 /* Called via elf_link_hash_traverse from ppc64_elf_build_stubs to
12979 write out any global entry stubs. */
12980
12981 static bfd_boolean
12982 build_global_entry_stubs (struct elf_link_hash_entry *h, void *inf)
12983 {
12984 struct bfd_link_info *info;
12985 struct ppc_link_hash_table *htab;
12986 struct plt_entry *pent;
12987 asection *s;
12988
12989 if (h->root.type == bfd_link_hash_indirect)
12990 return TRUE;
12991
12992 if (!h->pointer_equality_needed)
12993 return TRUE;
12994
12995 if (h->def_regular)
12996 return TRUE;
12997
12998 info = inf;
12999 htab = ppc_hash_table (info);
13000 if (htab == NULL)
13001 return FALSE;
13002
13003 s = htab->glink;
13004 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
13005 if (pent->plt.offset != (bfd_vma) -1
13006 && pent->addend == 0)
13007 {
13008 bfd_byte *p;
13009 asection *plt;
13010 bfd_vma off;
13011
13012 p = s->contents + h->root.u.def.value;
13013 plt = htab->elf.splt;
13014 if (!htab->elf.dynamic_sections_created
13015 || h->dynindx == -1)
13016 plt = htab->elf.iplt;
13017 off = pent->plt.offset + plt->output_offset + plt->output_section->vma;
13018 off -= h->root.u.def.value + s->output_offset + s->output_section->vma;
13019
13020 if (off + 0x80008000 > 0xffffffff || (off & 3) != 0)
13021 {
13022 info->callbacks->einfo
13023 (_("%P: linkage table error against `%T'\n"),
13024 h->root.root.string);
13025 bfd_set_error (bfd_error_bad_value);
13026 htab->stub_error = TRUE;
13027 }
13028
13029 htab->stub_count[ppc_stub_global_entry - 1] += 1;
13030 if (htab->params->emit_stub_syms)
13031 {
13032 size_t len = strlen (h->root.root.string);
13033 char *name = bfd_malloc (sizeof "12345678.global_entry." + len);
13034
13035 if (name == NULL)
13036 return FALSE;
13037
13038 sprintf (name, "%08x.global_entry.%s", s->id, h->root.root.string);
13039 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
13040 if (h == NULL)
13041 return FALSE;
13042 if (h->root.type == bfd_link_hash_new)
13043 {
13044 h->root.type = bfd_link_hash_defined;
13045 h->root.u.def.section = s;
13046 h->root.u.def.value = p - s->contents;
13047 h->ref_regular = 1;
13048 h->def_regular = 1;
13049 h->ref_regular_nonweak = 1;
13050 h->forced_local = 1;
13051 h->non_elf = 0;
13052 h->root.linker_def = 1;
13053 }
13054 }
13055
13056 if (PPC_HA (off) != 0)
13057 {
13058 bfd_put_32 (s->owner, ADDIS_R12_R12 | PPC_HA (off), p);
13059 p += 4;
13060 }
13061 bfd_put_32 (s->owner, LD_R12_0R12 | PPC_LO (off), p);
13062 p += 4;
13063 bfd_put_32 (s->owner, MTCTR_R12, p);
13064 p += 4;
13065 bfd_put_32 (s->owner, BCTR, p);
13066 break;
13067 }
13068 return TRUE;
13069 }
13070
13071 /* Build all the stubs associated with the current output file.
13072 The stubs are kept in a hash table attached to the main linker
13073 hash table. This function is called via gldelf64ppc_finish. */
13074
13075 bfd_boolean
13076 ppc64_elf_build_stubs (struct bfd_link_info *info,
13077 char **stats)
13078 {
13079 struct ppc_link_hash_table *htab = ppc_hash_table (info);
13080 struct map_stub *group;
13081 asection *stub_sec;
13082 bfd_byte *p;
13083 int stub_sec_count = 0;
13084
13085 if (htab == NULL)
13086 return FALSE;
13087
13088 /* Allocate memory to hold the linker stubs. */
13089 for (group = htab->group; group != NULL; group = group->next)
13090 if ((stub_sec = group->stub_sec) != NULL
13091 && stub_sec->size != 0)
13092 {
13093 stub_sec->contents = bfd_zalloc (htab->params->stub_bfd, stub_sec->size);
13094 if (stub_sec->contents == NULL)
13095 return FALSE;
13096 stub_sec->size = 0;
13097 }
13098
13099 if (htab->glink != NULL && htab->glink->size != 0)
13100 {
13101 unsigned int indx;
13102 bfd_vma plt0;
13103
13104 /* Build the .glink plt call stub. */
13105 if (htab->params->emit_stub_syms)
13106 {
13107 struct elf_link_hash_entry *h;
13108 h = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
13109 TRUE, FALSE, FALSE);
13110 if (h == NULL)
13111 return FALSE;
13112 if (h->root.type == bfd_link_hash_new)
13113 {
13114 h->root.type = bfd_link_hash_defined;
13115 h->root.u.def.section = htab->glink;
13116 h->root.u.def.value = 8;
13117 h->ref_regular = 1;
13118 h->def_regular = 1;
13119 h->ref_regular_nonweak = 1;
13120 h->forced_local = 1;
13121 h->non_elf = 0;
13122 h->root.linker_def = 1;
13123 }
13124 }
13125 plt0 = (htab->elf.splt->output_section->vma
13126 + htab->elf.splt->output_offset
13127 - 16);
13128 if (info->emitrelocations)
13129 {
13130 Elf_Internal_Rela *r = get_relocs (htab->glink, 1);
13131 if (r == NULL)
13132 return FALSE;
13133 r->r_offset = (htab->glink->output_offset
13134 + htab->glink->output_section->vma);
13135 r->r_info = ELF64_R_INFO (0, R_PPC64_REL64);
13136 r->r_addend = plt0;
13137 }
13138 p = htab->glink->contents;
13139 plt0 -= htab->glink->output_section->vma + htab->glink->output_offset;
13140 bfd_put_64 (htab->glink->owner, plt0, p);
13141 p += 8;
13142 if (htab->opd_abi)
13143 {
13144 bfd_put_32 (htab->glink->owner, MFLR_R12, p);
13145 p += 4;
13146 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
13147 p += 4;
13148 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
13149 p += 4;
13150 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | (-16 & 0xfffc), p);
13151 p += 4;
13152 bfd_put_32 (htab->glink->owner, MTLR_R12, p);
13153 p += 4;
13154 bfd_put_32 (htab->glink->owner, ADD_R11_R2_R11, p);
13155 p += 4;
13156 bfd_put_32 (htab->glink->owner, LD_R12_0R11, p);
13157 p += 4;
13158 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | 8, p);
13159 p += 4;
13160 bfd_put_32 (htab->glink->owner, MTCTR_R12, p);
13161 p += 4;
13162 bfd_put_32 (htab->glink->owner, LD_R11_0R11 | 16, p);
13163 p += 4;
13164 }
13165 else
13166 {
13167 bfd_put_32 (htab->glink->owner, MFLR_R0, p);
13168 p += 4;
13169 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
13170 p += 4;
13171 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
13172 p += 4;
13173 bfd_put_32 (htab->glink->owner, STD_R2_0R1 + 24, p);
13174 p += 4;
13175 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | (-16 & 0xfffc), p);
13176 p += 4;
13177 bfd_put_32 (htab->glink->owner, MTLR_R0, p);
13178 p += 4;
13179 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
13180 p += 4;
13181 bfd_put_32 (htab->glink->owner, ADD_R11_R2_R11, p);
13182 p += 4;
13183 bfd_put_32 (htab->glink->owner, ADDI_R0_R12 | (-48 & 0xffff), p);
13184 p += 4;
13185 bfd_put_32 (htab->glink->owner, LD_R12_0R11, p);
13186 p += 4;
13187 bfd_put_32 (htab->glink->owner, SRDI_R0_R0_2, p);
13188 p += 4;
13189 bfd_put_32 (htab->glink->owner, MTCTR_R12, p);
13190 p += 4;
13191 bfd_put_32 (htab->glink->owner, LD_R11_0R11 | 8, p);
13192 p += 4;
13193 }
13194 bfd_put_32 (htab->glink->owner, BCTR, p);
13195 p += 4;
13196 while (p - htab->glink->contents < GLINK_CALL_STUB_SIZE)
13197 {
13198 bfd_put_32 (htab->glink->owner, NOP, p);
13199 p += 4;
13200 }
13201
13202 /* Build the .glink lazy link call stubs. */
13203 indx = 0;
13204 while (p < htab->glink->contents + htab->glink->rawsize)
13205 {
13206 if (htab->opd_abi)
13207 {
13208 if (indx < 0x8000)
13209 {
13210 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
13211 p += 4;
13212 }
13213 else
13214 {
13215 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
13216 p += 4;
13217 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx),
13218 p);
13219 p += 4;
13220 }
13221 }
13222 bfd_put_32 (htab->glink->owner,
13223 B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p);
13224 indx++;
13225 p += 4;
13226 }
13227
13228 /* Build .glink global entry stubs. */
13229 if (htab->glink->size > htab->glink->rawsize)
13230 elf_link_hash_traverse (&htab->elf, build_global_entry_stubs, info);
13231 }
13232
13233 if (htab->brlt != NULL && htab->brlt->size != 0)
13234 {
13235 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
13236 htab->brlt->size);
13237 if (htab->brlt->contents == NULL)
13238 return FALSE;
13239 }
13240 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
13241 {
13242 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
13243 htab->relbrlt->size);
13244 if (htab->relbrlt->contents == NULL)
13245 return FALSE;
13246 }
13247
13248 /* Build the stubs as directed by the stub hash table. */
13249 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
13250
13251 for (group = htab->group; group != NULL; group = group->next)
13252 if (group->needs_save_res)
13253 {
13254 stub_sec = group->stub_sec;
13255 memcpy (stub_sec->contents + stub_sec->size, htab->sfpr->contents,
13256 htab->sfpr->size);
13257 if (htab->params->emit_stub_syms)
13258 {
13259 unsigned int i;
13260
13261 for (i = 0; i < ARRAY_SIZE (save_res_funcs); i++)
13262 if (!sfpr_define (info, &save_res_funcs[i], stub_sec))
13263 return FALSE;
13264 }
13265 stub_sec->size += htab->sfpr->size;
13266 }
13267
13268 if (htab->relbrlt != NULL)
13269 htab->relbrlt->reloc_count = 0;
13270
13271 if (htab->params->plt_stub_align != 0)
13272 for (group = htab->group; group != NULL; group = group->next)
13273 if ((stub_sec = group->stub_sec) != NULL)
13274 stub_sec->size = ((stub_sec->size
13275 + (1 << htab->params->plt_stub_align) - 1)
13276 & -(1 << htab->params->plt_stub_align));
13277
13278 for (group = htab->group; group != NULL; group = group->next)
13279 if ((stub_sec = group->stub_sec) != NULL)
13280 {
13281 stub_sec_count += 1;
13282 if (stub_sec->rawsize != stub_sec->size
13283 && (htab->stub_iteration <= STUB_SHRINK_ITER
13284 || stub_sec->rawsize < stub_sec->size))
13285 break;
13286 }
13287
13288 if (group != NULL)
13289 {
13290 htab->stub_error = TRUE;
13291 info->callbacks->einfo (_("%P: stubs don't match calculated size\n"));
13292 }
13293
13294 if (htab->stub_error)
13295 return FALSE;
13296
13297 if (stats != NULL)
13298 {
13299 size_t len;
13300 *stats = bfd_malloc (500);
13301 if (*stats == NULL)
13302 return FALSE;
13303
13304 len = sprintf (*stats,
13305 ngettext ("linker stubs in %u group\n",
13306 "linker stubs in %u groups\n",
13307 stub_sec_count),
13308 stub_sec_count);
13309 sprintf (*stats + len, _(" branch %lu\n"
13310 " toc adjust %lu\n"
13311 " long branch %lu\n"
13312 " long toc adj %lu\n"
13313 " plt call %lu\n"
13314 " plt call toc %lu\n"
13315 " global entry %lu"),
13316 htab->stub_count[ppc_stub_long_branch - 1],
13317 htab->stub_count[ppc_stub_long_branch_r2off - 1],
13318 htab->stub_count[ppc_stub_plt_branch - 1],
13319 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
13320 htab->stub_count[ppc_stub_plt_call - 1],
13321 htab->stub_count[ppc_stub_plt_call_r2save - 1],
13322 htab->stub_count[ppc_stub_global_entry - 1]);
13323 }
13324 return TRUE;
13325 }
13326
13327 /* What to do when ld finds relocations against symbols defined in
13328 discarded sections. */
13329
13330 static unsigned int
13331 ppc64_elf_action_discarded (asection *sec)
13332 {
13333 if (strcmp (".opd", sec->name) == 0)
13334 return 0;
13335
13336 if (strcmp (".toc", sec->name) == 0)
13337 return 0;
13338
13339 if (strcmp (".toc1", sec->name) == 0)
13340 return 0;
13341
13342 return _bfd_elf_default_action_discarded (sec);
13343 }
13344
13345 /* The RELOCATE_SECTION function is called by the ELF backend linker
13346 to handle the relocations for a section.
13347
13348 The relocs are always passed as Rela structures; if the section
13349 actually uses Rel structures, the r_addend field will always be
13350 zero.
13351
13352 This function is responsible for adjust the section contents as
13353 necessary, and (if using Rela relocs and generating a
13354 relocatable output file) adjusting the reloc addend as
13355 necessary.
13356
13357 This function does not have to worry about setting the reloc
13358 address or the reloc symbol index.
13359
13360 LOCAL_SYMS is a pointer to the swapped in local symbols.
13361
13362 LOCAL_SECTIONS is an array giving the section in the input file
13363 corresponding to the st_shndx field of each local symbol.
13364
13365 The global hash table entry for the global symbols can be found
13366 via elf_sym_hashes (input_bfd).
13367
13368 When generating relocatable output, this function must handle
13369 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
13370 going to be the section symbol corresponding to the output
13371 section, which means that the addend must be adjusted
13372 accordingly. */
13373
13374 static bfd_boolean
13375 ppc64_elf_relocate_section (bfd *output_bfd,
13376 struct bfd_link_info *info,
13377 bfd *input_bfd,
13378 asection *input_section,
13379 bfd_byte *contents,
13380 Elf_Internal_Rela *relocs,
13381 Elf_Internal_Sym *local_syms,
13382 asection **local_sections)
13383 {
13384 struct ppc_link_hash_table *htab;
13385 Elf_Internal_Shdr *symtab_hdr;
13386 struct elf_link_hash_entry **sym_hashes;
13387 Elf_Internal_Rela *rel;
13388 Elf_Internal_Rela *wrel;
13389 Elf_Internal_Rela *relend;
13390 Elf_Internal_Rela outrel;
13391 bfd_byte *loc;
13392 struct got_entry **local_got_ents;
13393 bfd_vma TOCstart;
13394 bfd_boolean ret = TRUE;
13395 bfd_boolean is_opd;
13396 /* Assume 'at' branch hints. */
13397 bfd_boolean is_isa_v2 = TRUE;
13398 bfd_vma d_offset = (bfd_big_endian (input_bfd) ? 2 : 0);
13399
13400 /* Initialize howto table if needed. */
13401 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
13402 ppc_howto_init ();
13403
13404 htab = ppc_hash_table (info);
13405 if (htab == NULL)
13406 return FALSE;
13407
13408 /* Don't relocate stub sections. */
13409 if (input_section->owner == htab->params->stub_bfd)
13410 return TRUE;
13411
13412 BFD_ASSERT (is_ppc64_elf (input_bfd));
13413
13414 local_got_ents = elf_local_got_ents (input_bfd);
13415 TOCstart = elf_gp (output_bfd);
13416 symtab_hdr = &elf_symtab_hdr (input_bfd);
13417 sym_hashes = elf_sym_hashes (input_bfd);
13418 is_opd = ppc64_elf_section_data (input_section)->sec_type == sec_opd;
13419
13420 rel = wrel = relocs;
13421 relend = relocs + input_section->reloc_count;
13422 for (; rel < relend; wrel++, rel++)
13423 {
13424 enum elf_ppc64_reloc_type r_type;
13425 bfd_vma addend;
13426 bfd_reloc_status_type r;
13427 Elf_Internal_Sym *sym;
13428 asection *sec;
13429 struct elf_link_hash_entry *h_elf;
13430 struct ppc_link_hash_entry *h;
13431 struct ppc_link_hash_entry *fdh;
13432 const char *sym_name;
13433 unsigned long r_symndx, toc_symndx;
13434 bfd_vma toc_addend;
13435 unsigned char tls_mask, tls_gd, tls_type;
13436 unsigned char sym_type;
13437 bfd_vma relocation;
13438 bfd_boolean unresolved_reloc;
13439 bfd_boolean warned;
13440 enum { DEST_NORMAL, DEST_OPD, DEST_STUB } reloc_dest;
13441 unsigned int insn;
13442 unsigned int mask;
13443 struct ppc_stub_hash_entry *stub_entry;
13444 bfd_vma max_br_offset;
13445 bfd_vma from;
13446 Elf_Internal_Rela orig_rel;
13447 reloc_howto_type *howto;
13448 struct reloc_howto_struct alt_howto;
13449
13450 again:
13451 orig_rel = *rel;
13452
13453 r_type = ELF64_R_TYPE (rel->r_info);
13454 r_symndx = ELF64_R_SYM (rel->r_info);
13455
13456 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
13457 symbol of the previous ADDR64 reloc. The symbol gives us the
13458 proper TOC base to use. */
13459 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
13460 && wrel != relocs
13461 && ELF64_R_TYPE (wrel[-1].r_info) == R_PPC64_ADDR64
13462 && is_opd)
13463 r_symndx = ELF64_R_SYM (wrel[-1].r_info);
13464
13465 sym = NULL;
13466 sec = NULL;
13467 h_elf = NULL;
13468 sym_name = NULL;
13469 unresolved_reloc = FALSE;
13470 warned = FALSE;
13471
13472 if (r_symndx < symtab_hdr->sh_info)
13473 {
13474 /* It's a local symbol. */
13475 struct _opd_sec_data *opd;
13476
13477 sym = local_syms + r_symndx;
13478 sec = local_sections[r_symndx];
13479 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
13480 sym_type = ELF64_ST_TYPE (sym->st_info);
13481 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
13482 opd = get_opd_info (sec);
13483 if (opd != NULL && opd->adjust != NULL)
13484 {
13485 long adjust = opd->adjust[OPD_NDX (sym->st_value
13486 + rel->r_addend)];
13487 if (adjust == -1)
13488 relocation = 0;
13489 else
13490 {
13491 /* If this is a relocation against the opd section sym
13492 and we have edited .opd, adjust the reloc addend so
13493 that ld -r and ld --emit-relocs output is correct.
13494 If it is a reloc against some other .opd symbol,
13495 then the symbol value will be adjusted later. */
13496 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
13497 rel->r_addend += adjust;
13498 else
13499 relocation += adjust;
13500 }
13501 }
13502 }
13503 else
13504 {
13505 bfd_boolean ignored;
13506
13507 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
13508 r_symndx, symtab_hdr, sym_hashes,
13509 h_elf, sec, relocation,
13510 unresolved_reloc, warned, ignored);
13511 sym_name = h_elf->root.root.string;
13512 sym_type = h_elf->type;
13513 if (sec != NULL
13514 && sec->owner == output_bfd
13515 && strcmp (sec->name, ".opd") == 0)
13516 {
13517 /* This is a symbol defined in a linker script. All
13518 such are defined in output sections, even those
13519 defined by simple assignment from a symbol defined in
13520 an input section. Transfer the symbol to an
13521 appropriate input .opd section, so that a branch to
13522 this symbol will be mapped to the location specified
13523 by the opd entry. */
13524 struct bfd_link_order *lo;
13525 for (lo = sec->map_head.link_order; lo != NULL; lo = lo->next)
13526 if (lo->type == bfd_indirect_link_order)
13527 {
13528 asection *isec = lo->u.indirect.section;
13529 if (h_elf->root.u.def.value >= isec->output_offset
13530 && h_elf->root.u.def.value < (isec->output_offset
13531 + isec->size))
13532 {
13533 h_elf->root.u.def.value -= isec->output_offset;
13534 h_elf->root.u.def.section = isec;
13535 sec = isec;
13536 break;
13537 }
13538 }
13539 }
13540 }
13541 h = (struct ppc_link_hash_entry *) h_elf;
13542
13543 if (sec != NULL && discarded_section (sec))
13544 {
13545 _bfd_clear_contents (ppc64_elf_howto_table[r_type],
13546 input_bfd, input_section,
13547 contents + rel->r_offset);
13548 wrel->r_offset = rel->r_offset;
13549 wrel->r_info = 0;
13550 wrel->r_addend = 0;
13551
13552 /* For ld -r, remove relocations in debug sections against
13553 symbols defined in discarded sections. Not done for
13554 non-debug to preserve relocs in .eh_frame which the
13555 eh_frame editing code expects to be present. */
13556 if (bfd_link_relocatable (info)
13557 && (input_section->flags & SEC_DEBUGGING))
13558 wrel--;
13559
13560 continue;
13561 }
13562
13563 if (bfd_link_relocatable (info))
13564 goto copy_reloc;
13565
13566 if (h != NULL && &h->elf == htab->elf.hgot)
13567 {
13568 relocation = TOCstart + htab->sec_info[input_section->id].toc_off;
13569 sec = bfd_abs_section_ptr;
13570 unresolved_reloc = FALSE;
13571 }
13572
13573 /* TLS optimizations. Replace instruction sequences and relocs
13574 based on information we collected in tls_optimize. We edit
13575 RELOCS so that --emit-relocs will output something sensible
13576 for the final instruction stream. */
13577 tls_mask = 0;
13578 tls_gd = 0;
13579 toc_symndx = 0;
13580 if (h != NULL)
13581 tls_mask = h->tls_mask;
13582 else if (local_got_ents != NULL)
13583 {
13584 struct plt_entry **local_plt = (struct plt_entry **)
13585 (local_got_ents + symtab_hdr->sh_info);
13586 unsigned char *lgot_masks = (unsigned char *)
13587 (local_plt + symtab_hdr->sh_info);
13588 tls_mask = lgot_masks[r_symndx];
13589 }
13590 if (tls_mask == 0
13591 && (r_type == R_PPC64_TLS
13592 || r_type == R_PPC64_TLSGD
13593 || r_type == R_PPC64_TLSLD))
13594 {
13595 /* Check for toc tls entries. */
13596 unsigned char *toc_tls;
13597
13598 if (!get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
13599 &local_syms, rel, input_bfd))
13600 return FALSE;
13601
13602 if (toc_tls)
13603 tls_mask = *toc_tls;
13604 }
13605
13606 /* Check that tls relocs are used with tls syms, and non-tls
13607 relocs are used with non-tls syms. */
13608 if (r_symndx != STN_UNDEF
13609 && r_type != R_PPC64_NONE
13610 && (h == NULL
13611 || h->elf.root.type == bfd_link_hash_defined
13612 || h->elf.root.type == bfd_link_hash_defweak)
13613 && (IS_PPC64_TLS_RELOC (r_type)
13614 != (sym_type == STT_TLS
13615 || (sym_type == STT_SECTION
13616 && (sec->flags & SEC_THREAD_LOCAL) != 0))))
13617 {
13618 if (tls_mask != 0
13619 && (r_type == R_PPC64_TLS
13620 || r_type == R_PPC64_TLSGD
13621 || r_type == R_PPC64_TLSLD))
13622 /* R_PPC64_TLS is OK against a symbol in the TOC. */
13623 ;
13624 else
13625 info->callbacks->einfo
13626 (!IS_PPC64_TLS_RELOC (r_type)
13627 /* xgettext:c-format */
13628 ? _("%H: %s used with TLS symbol `%T'\n")
13629 /* xgettext:c-format */
13630 : _("%H: %s used with non-TLS symbol `%T'\n"),
13631 input_bfd, input_section, rel->r_offset,
13632 ppc64_elf_howto_table[r_type]->name,
13633 sym_name);
13634 }
13635
13636 /* Ensure reloc mapping code below stays sane. */
13637 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
13638 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
13639 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
13640 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
13641 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
13642 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
13643 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
13644 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
13645 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
13646 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
13647 abort ();
13648
13649 switch (r_type)
13650 {
13651 default:
13652 break;
13653
13654 case R_PPC64_LO_DS_OPT:
13655 insn = bfd_get_32 (input_bfd, contents + rel->r_offset - d_offset);
13656 if ((insn & (0x3f << 26)) != 58u << 26)
13657 abort ();
13658 insn += (14u << 26) - (58u << 26);
13659 bfd_put_32 (input_bfd, insn, contents + rel->r_offset - d_offset);
13660 r_type = R_PPC64_TOC16_LO;
13661 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13662 break;
13663
13664 case R_PPC64_TOC16:
13665 case R_PPC64_TOC16_LO:
13666 case R_PPC64_TOC16_DS:
13667 case R_PPC64_TOC16_LO_DS:
13668 {
13669 /* Check for toc tls entries. */
13670 unsigned char *toc_tls;
13671 int retval;
13672
13673 retval = get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
13674 &local_syms, rel, input_bfd);
13675 if (retval == 0)
13676 return FALSE;
13677
13678 if (toc_tls)
13679 {
13680 tls_mask = *toc_tls;
13681 if (r_type == R_PPC64_TOC16_DS
13682 || r_type == R_PPC64_TOC16_LO_DS)
13683 {
13684 if (tls_mask != 0
13685 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
13686 goto toctprel;
13687 }
13688 else
13689 {
13690 /* If we found a GD reloc pair, then we might be
13691 doing a GD->IE transition. */
13692 if (retval == 2)
13693 {
13694 tls_gd = TLS_TPRELGD;
13695 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13696 goto tls_ldgd_opt;
13697 }
13698 else if (retval == 3)
13699 {
13700 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13701 goto tls_ldgd_opt;
13702 }
13703 }
13704 }
13705 }
13706 break;
13707
13708 case R_PPC64_GOT_TPREL16_HI:
13709 case R_PPC64_GOT_TPREL16_HA:
13710 if (tls_mask != 0
13711 && (tls_mask & TLS_TPREL) == 0)
13712 {
13713 rel->r_offset -= d_offset;
13714 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
13715 r_type = R_PPC64_NONE;
13716 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13717 }
13718 break;
13719
13720 case R_PPC64_GOT_TPREL16_DS:
13721 case R_PPC64_GOT_TPREL16_LO_DS:
13722 if (tls_mask != 0
13723 && (tls_mask & TLS_TPREL) == 0)
13724 {
13725 toctprel:
13726 insn = bfd_get_32 (input_bfd,
13727 contents + rel->r_offset - d_offset);
13728 insn &= 31 << 21;
13729 insn |= 0x3c0d0000; /* addis 0,13,0 */
13730 bfd_put_32 (input_bfd, insn,
13731 contents + rel->r_offset - d_offset);
13732 r_type = R_PPC64_TPREL16_HA;
13733 if (toc_symndx != 0)
13734 {
13735 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
13736 rel->r_addend = toc_addend;
13737 /* We changed the symbol. Start over in order to
13738 get h, sym, sec etc. right. */
13739 goto again;
13740 }
13741 else
13742 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13743 }
13744 break;
13745
13746 case R_PPC64_TLS:
13747 if (tls_mask != 0
13748 && (tls_mask & TLS_TPREL) == 0)
13749 {
13750 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
13751 insn = _bfd_elf_ppc_at_tls_transform (insn, 13);
13752 if (insn == 0)
13753 abort ();
13754 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
13755 /* Was PPC64_TLS which sits on insn boundary, now
13756 PPC64_TPREL16_LO which is at low-order half-word. */
13757 rel->r_offset += d_offset;
13758 r_type = R_PPC64_TPREL16_LO;
13759 if (toc_symndx != 0)
13760 {
13761 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
13762 rel->r_addend = toc_addend;
13763 /* We changed the symbol. Start over in order to
13764 get h, sym, sec etc. right. */
13765 goto again;
13766 }
13767 else
13768 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13769 }
13770 break;
13771
13772 case R_PPC64_GOT_TLSGD16_HI:
13773 case R_PPC64_GOT_TLSGD16_HA:
13774 tls_gd = TLS_TPRELGD;
13775 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13776 goto tls_gdld_hi;
13777 break;
13778
13779 case R_PPC64_GOT_TLSLD16_HI:
13780 case R_PPC64_GOT_TLSLD16_HA:
13781 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13782 {
13783 tls_gdld_hi:
13784 if ((tls_mask & tls_gd) != 0)
13785 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
13786 + R_PPC64_GOT_TPREL16_DS);
13787 else
13788 {
13789 rel->r_offset -= d_offset;
13790 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
13791 r_type = R_PPC64_NONE;
13792 }
13793 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13794 }
13795 break;
13796
13797 case R_PPC64_GOT_TLSGD16:
13798 case R_PPC64_GOT_TLSGD16_LO:
13799 tls_gd = TLS_TPRELGD;
13800 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13801 goto tls_ldgd_opt;
13802 break;
13803
13804 case R_PPC64_GOT_TLSLD16:
13805 case R_PPC64_GOT_TLSLD16_LO:
13806 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13807 {
13808 unsigned int insn1, insn2;
13809 bfd_vma offset;
13810
13811 tls_ldgd_opt:
13812 offset = (bfd_vma) -1;
13813 /* If not using the newer R_PPC64_TLSGD/LD to mark
13814 __tls_get_addr calls, we must trust that the call
13815 stays with its arg setup insns, ie. that the next
13816 reloc is the __tls_get_addr call associated with
13817 the current reloc. Edit both insns. */
13818 if (input_section->has_tls_get_addr_call
13819 && rel + 1 < relend
13820 && branch_reloc_hash_match (input_bfd, rel + 1,
13821 htab->tls_get_addr,
13822 htab->tls_get_addr_fd))
13823 offset = rel[1].r_offset;
13824 /* We read the low GOT_TLS (or TOC16) insn because we
13825 need to keep the destination reg. It may be
13826 something other than the usual r3, and moved to r3
13827 before the call by intervening code. */
13828 insn1 = bfd_get_32 (input_bfd,
13829 contents + rel->r_offset - d_offset);
13830 if ((tls_mask & tls_gd) != 0)
13831 {
13832 /* IE */
13833 insn1 &= (0x1f << 21) | (0x1f << 16);
13834 insn1 |= 58 << 26; /* ld */
13835 insn2 = 0x7c636a14; /* add 3,3,13 */
13836 if (offset != (bfd_vma) -1)
13837 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13838 if ((tls_mask & TLS_EXPLICIT) == 0)
13839 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
13840 + R_PPC64_GOT_TPREL16_DS);
13841 else
13842 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
13843 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13844 }
13845 else
13846 {
13847 /* LE */
13848 insn1 &= 0x1f << 21;
13849 insn1 |= 0x3c0d0000; /* addis r,13,0 */
13850 insn2 = 0x38630000; /* addi 3,3,0 */
13851 if (tls_gd == 0)
13852 {
13853 /* Was an LD reloc. */
13854 if (toc_symndx)
13855 sec = local_sections[toc_symndx];
13856 for (r_symndx = 0;
13857 r_symndx < symtab_hdr->sh_info;
13858 r_symndx++)
13859 if (local_sections[r_symndx] == sec)
13860 break;
13861 if (r_symndx >= symtab_hdr->sh_info)
13862 r_symndx = STN_UNDEF;
13863 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
13864 if (r_symndx != STN_UNDEF)
13865 rel->r_addend -= (local_syms[r_symndx].st_value
13866 + sec->output_offset
13867 + sec->output_section->vma);
13868 }
13869 else if (toc_symndx != 0)
13870 {
13871 r_symndx = toc_symndx;
13872 rel->r_addend = toc_addend;
13873 }
13874 r_type = R_PPC64_TPREL16_HA;
13875 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13876 if (offset != (bfd_vma) -1)
13877 {
13878 rel[1].r_info = ELF64_R_INFO (r_symndx,
13879 R_PPC64_TPREL16_LO);
13880 rel[1].r_offset = offset + d_offset;
13881 rel[1].r_addend = rel->r_addend;
13882 }
13883 }
13884 bfd_put_32 (input_bfd, insn1,
13885 contents + rel->r_offset - d_offset);
13886 if (offset != (bfd_vma) -1)
13887 bfd_put_32 (input_bfd, insn2, contents + offset);
13888 if ((tls_mask & tls_gd) == 0
13889 && (tls_gd == 0 || toc_symndx != 0))
13890 {
13891 /* We changed the symbol. Start over in order
13892 to get h, sym, sec etc. right. */
13893 goto again;
13894 }
13895 }
13896 break;
13897
13898 case R_PPC64_TLSGD:
13899 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13900 {
13901 unsigned int insn2;
13902 bfd_vma offset = rel->r_offset;
13903
13904 if ((tls_mask & TLS_TPRELGD) != 0)
13905 {
13906 /* IE */
13907 r_type = R_PPC64_NONE;
13908 insn2 = 0x7c636a14; /* add 3,3,13 */
13909 }
13910 else
13911 {
13912 /* LE */
13913 if (toc_symndx != 0)
13914 {
13915 r_symndx = toc_symndx;
13916 rel->r_addend = toc_addend;
13917 }
13918 r_type = R_PPC64_TPREL16_LO;
13919 rel->r_offset = offset + d_offset;
13920 insn2 = 0x38630000; /* addi 3,3,0 */
13921 }
13922 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13923 /* Zap the reloc on the _tls_get_addr call too. */
13924 BFD_ASSERT (offset == rel[1].r_offset);
13925 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13926 bfd_put_32 (input_bfd, insn2, contents + offset);
13927 if ((tls_mask & TLS_TPRELGD) == 0 && toc_symndx != 0)
13928 goto again;
13929 }
13930 break;
13931
13932 case R_PPC64_TLSLD:
13933 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13934 {
13935 unsigned int insn2;
13936 bfd_vma offset = rel->r_offset;
13937
13938 if (toc_symndx)
13939 sec = local_sections[toc_symndx];
13940 for (r_symndx = 0;
13941 r_symndx < symtab_hdr->sh_info;
13942 r_symndx++)
13943 if (local_sections[r_symndx] == sec)
13944 break;
13945 if (r_symndx >= symtab_hdr->sh_info)
13946 r_symndx = STN_UNDEF;
13947 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
13948 if (r_symndx != STN_UNDEF)
13949 rel->r_addend -= (local_syms[r_symndx].st_value
13950 + sec->output_offset
13951 + sec->output_section->vma);
13952
13953 r_type = R_PPC64_TPREL16_LO;
13954 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13955 rel->r_offset = offset + d_offset;
13956 /* Zap the reloc on the _tls_get_addr call too. */
13957 BFD_ASSERT (offset == rel[1].r_offset);
13958 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13959 insn2 = 0x38630000; /* addi 3,3,0 */
13960 bfd_put_32 (input_bfd, insn2, contents + offset);
13961 goto again;
13962 }
13963 break;
13964
13965 case R_PPC64_DTPMOD64:
13966 if (rel + 1 < relend
13967 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
13968 && rel[1].r_offset == rel->r_offset + 8)
13969 {
13970 if ((tls_mask & TLS_GD) == 0)
13971 {
13972 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
13973 if ((tls_mask & TLS_TPRELGD) != 0)
13974 r_type = R_PPC64_TPREL64;
13975 else
13976 {
13977 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
13978 r_type = R_PPC64_NONE;
13979 }
13980 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13981 }
13982 }
13983 else
13984 {
13985 if ((tls_mask & TLS_LD) == 0)
13986 {
13987 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
13988 r_type = R_PPC64_NONE;
13989 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13990 }
13991 }
13992 break;
13993
13994 case R_PPC64_TPREL64:
13995 if ((tls_mask & TLS_TPREL) == 0)
13996 {
13997 r_type = R_PPC64_NONE;
13998 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13999 }
14000 break;
14001
14002 case R_PPC64_ENTRY:
14003 relocation = TOCstart + htab->sec_info[input_section->id].toc_off;
14004 if (!bfd_link_pic (info)
14005 && !info->traditional_format
14006 && relocation + 0x80008000 <= 0xffffffff)
14007 {
14008 unsigned int insn1, insn2;
14009
14010 insn1 = bfd_get_32 (input_bfd, contents + rel->r_offset);
14011 insn2 = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
14012 if ((insn1 & ~0xfffc) == LD_R2_0R12
14013 && insn2 == ADD_R2_R2_R12)
14014 {
14015 bfd_put_32 (input_bfd,
14016 LIS_R2 + PPC_HA (relocation),
14017 contents + rel->r_offset);
14018 bfd_put_32 (input_bfd,
14019 ADDI_R2_R2 + PPC_LO (relocation),
14020 contents + rel->r_offset + 4);
14021 }
14022 }
14023 else
14024 {
14025 relocation -= (rel->r_offset
14026 + input_section->output_offset
14027 + input_section->output_section->vma);
14028 if (relocation + 0x80008000 <= 0xffffffff)
14029 {
14030 unsigned int insn1, insn2;
14031
14032 insn1 = bfd_get_32 (input_bfd, contents + rel->r_offset);
14033 insn2 = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
14034 if ((insn1 & ~0xfffc) == LD_R2_0R12
14035 && insn2 == ADD_R2_R2_R12)
14036 {
14037 bfd_put_32 (input_bfd,
14038 ADDIS_R2_R12 + PPC_HA (relocation),
14039 contents + rel->r_offset);
14040 bfd_put_32 (input_bfd,
14041 ADDI_R2_R2 + PPC_LO (relocation),
14042 contents + rel->r_offset + 4);
14043 }
14044 }
14045 }
14046 break;
14047
14048 case R_PPC64_REL16_HA:
14049 /* If we are generating a non-PIC executable, edit
14050 . 0: addis 2,12,.TOC.-0b@ha
14051 . addi 2,2,.TOC.-0b@l
14052 used by ELFv2 global entry points to set up r2, to
14053 . lis 2,.TOC.@ha
14054 . addi 2,2,.TOC.@l
14055 if .TOC. is in range. */
14056 if (!bfd_link_pic (info)
14057 && !info->traditional_format
14058 && !htab->opd_abi
14059 && rel->r_addend == d_offset
14060 && h != NULL && &h->elf == htab->elf.hgot
14061 && rel + 1 < relend
14062 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_REL16_LO)
14063 && rel[1].r_offset == rel->r_offset + 4
14064 && rel[1].r_addend == rel->r_addend + 4
14065 && relocation + 0x80008000 <= 0xffffffff)
14066 {
14067 unsigned int insn1, insn2;
14068 bfd_vma offset = rel->r_offset - d_offset;
14069 insn1 = bfd_get_32 (input_bfd, contents + offset);
14070 insn2 = bfd_get_32 (input_bfd, contents + offset + 4);
14071 if ((insn1 & 0xffff0000) == ADDIS_R2_R12
14072 && (insn2 & 0xffff0000) == ADDI_R2_R2)
14073 {
14074 r_type = R_PPC64_ADDR16_HA;
14075 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14076 rel->r_addend -= d_offset;
14077 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_ADDR16_LO);
14078 rel[1].r_addend -= d_offset + 4;
14079 bfd_put_32 (input_bfd, LIS_R2, contents + offset);
14080 }
14081 }
14082 break;
14083 }
14084
14085 /* Handle other relocations that tweak non-addend part of insn. */
14086 insn = 0;
14087 max_br_offset = 1 << 25;
14088 addend = rel->r_addend;
14089 reloc_dest = DEST_NORMAL;
14090 switch (r_type)
14091 {
14092 default:
14093 break;
14094
14095 case R_PPC64_TOCSAVE:
14096 if (relocation + addend == (rel->r_offset
14097 + input_section->output_offset
14098 + input_section->output_section->vma)
14099 && tocsave_find (htab, NO_INSERT,
14100 &local_syms, rel, input_bfd))
14101 {
14102 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
14103 if (insn == NOP
14104 || insn == CROR_151515 || insn == CROR_313131)
14105 bfd_put_32 (input_bfd,
14106 STD_R2_0R1 + STK_TOC (htab),
14107 contents + rel->r_offset);
14108 }
14109 break;
14110
14111 /* Branch taken prediction relocations. */
14112 case R_PPC64_ADDR14_BRTAKEN:
14113 case R_PPC64_REL14_BRTAKEN:
14114 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
14115 /* Fall through. */
14116
14117 /* Branch not taken prediction relocations. */
14118 case R_PPC64_ADDR14_BRNTAKEN:
14119 case R_PPC64_REL14_BRNTAKEN:
14120 insn |= bfd_get_32 (input_bfd,
14121 contents + rel->r_offset) & ~(0x01 << 21);
14122 /* Fall through. */
14123
14124 case R_PPC64_REL14:
14125 max_br_offset = 1 << 15;
14126 /* Fall through. */
14127
14128 case R_PPC64_REL24:
14129 /* Calls to functions with a different TOC, such as calls to
14130 shared objects, need to alter the TOC pointer. This is
14131 done using a linkage stub. A REL24 branching to these
14132 linkage stubs needs to be followed by a nop, as the nop
14133 will be replaced with an instruction to restore the TOC
14134 base pointer. */
14135 fdh = h;
14136 if (h != NULL
14137 && h->oh != NULL
14138 && h->oh->is_func_descriptor)
14139 fdh = ppc_follow_link (h->oh);
14140 stub_entry = ppc_get_stub_entry (input_section, sec, fdh, &orig_rel,
14141 htab);
14142 if (stub_entry != NULL
14143 && (stub_entry->stub_type == ppc_stub_plt_call
14144 || stub_entry->stub_type == ppc_stub_plt_call_r2save
14145 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
14146 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
14147 {
14148 bfd_boolean can_plt_call = FALSE;
14149
14150 if (stub_entry->stub_type == ppc_stub_plt_call
14151 && !htab->opd_abi
14152 && htab->params->plt_localentry0 != 0
14153 && is_elfv2_localentry0 (&h->elf))
14154 {
14155 /* The function doesn't use or change r2. */
14156 can_plt_call = TRUE;
14157 }
14158
14159 /* All of these stubs may modify r2, so there must be a
14160 branch and link followed by a nop. The nop is
14161 replaced by an insn to restore r2. */
14162 else if (rel->r_offset + 8 <= input_section->size)
14163 {
14164 unsigned long br;
14165
14166 br = bfd_get_32 (input_bfd,
14167 contents + rel->r_offset);
14168 if ((br & 1) != 0)
14169 {
14170 unsigned long nop;
14171
14172 nop = bfd_get_32 (input_bfd,
14173 contents + rel->r_offset + 4);
14174 if (nop == NOP
14175 || nop == CROR_151515 || nop == CROR_313131)
14176 {
14177 if (h != NULL
14178 && (h == htab->tls_get_addr_fd
14179 || h == htab->tls_get_addr)
14180 && htab->params->tls_get_addr_opt)
14181 {
14182 /* Special stub used, leave nop alone. */
14183 }
14184 else
14185 bfd_put_32 (input_bfd,
14186 LD_R2_0R1 + STK_TOC (htab),
14187 contents + rel->r_offset + 4);
14188 can_plt_call = TRUE;
14189 }
14190 }
14191 }
14192
14193 if (!can_plt_call && h != NULL)
14194 {
14195 const char *name = h->elf.root.root.string;
14196
14197 if (*name == '.')
14198 ++name;
14199
14200 if (strncmp (name, "__libc_start_main", 17) == 0
14201 && (name[17] == 0 || name[17] == '@'))
14202 {
14203 /* Allow crt1 branch to go via a toc adjusting
14204 stub. Other calls that never return could do
14205 the same, if we could detect such. */
14206 can_plt_call = TRUE;
14207 }
14208 }
14209
14210 if (!can_plt_call)
14211 {
14212 /* g++ as of 20130507 emits self-calls without a
14213 following nop. This is arguably wrong since we
14214 have conflicting information. On the one hand a
14215 global symbol and on the other a local call
14216 sequence, but don't error for this special case.
14217 It isn't possible to cheaply verify we have
14218 exactly such a call. Allow all calls to the same
14219 section. */
14220 asection *code_sec = sec;
14221
14222 if (get_opd_info (sec) != NULL)
14223 {
14224 bfd_vma off = (relocation + addend
14225 - sec->output_section->vma
14226 - sec->output_offset);
14227
14228 opd_entry_value (sec, off, &code_sec, NULL, FALSE);
14229 }
14230 if (code_sec == input_section)
14231 can_plt_call = TRUE;
14232 }
14233
14234 if (!can_plt_call)
14235 {
14236 if (stub_entry->stub_type == ppc_stub_plt_call
14237 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14238 info->callbacks->einfo
14239 /* xgettext:c-format */
14240 (_("%H: call to `%T' lacks nop, can't restore toc; "
14241 "recompile with -fPIC\n"),
14242 input_bfd, input_section, rel->r_offset, sym_name);
14243 else
14244 info->callbacks->einfo
14245 /* xgettext:c-format */
14246 (_("%H: call to `%T' lacks nop, can't restore toc; "
14247 "(-mcmodel=small toc adjust stub)\n"),
14248 input_bfd, input_section, rel->r_offset, sym_name);
14249
14250 bfd_set_error (bfd_error_bad_value);
14251 ret = FALSE;
14252 }
14253
14254 if (can_plt_call
14255 && (stub_entry->stub_type == ppc_stub_plt_call
14256 || stub_entry->stub_type == ppc_stub_plt_call_r2save))
14257 unresolved_reloc = FALSE;
14258 }
14259
14260 if ((stub_entry == NULL
14261 || stub_entry->stub_type == ppc_stub_long_branch
14262 || stub_entry->stub_type == ppc_stub_plt_branch)
14263 && get_opd_info (sec) != NULL)
14264 {
14265 /* The branch destination is the value of the opd entry. */
14266 bfd_vma off = (relocation + addend
14267 - sec->output_section->vma
14268 - sec->output_offset);
14269 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL, FALSE);
14270 if (dest != (bfd_vma) -1)
14271 {
14272 relocation = dest;
14273 addend = 0;
14274 reloc_dest = DEST_OPD;
14275 }
14276 }
14277
14278 /* If the branch is out of reach we ought to have a long
14279 branch stub. */
14280 from = (rel->r_offset
14281 + input_section->output_offset
14282 + input_section->output_section->vma);
14283
14284 relocation += PPC64_LOCAL_ENTRY_OFFSET (fdh
14285 ? fdh->elf.other
14286 : sym->st_other);
14287
14288 if (stub_entry != NULL
14289 && (stub_entry->stub_type == ppc_stub_long_branch
14290 || stub_entry->stub_type == ppc_stub_plt_branch)
14291 && (r_type == R_PPC64_ADDR14_BRTAKEN
14292 || r_type == R_PPC64_ADDR14_BRNTAKEN
14293 || (relocation + addend - from + max_br_offset
14294 < 2 * max_br_offset)))
14295 /* Don't use the stub if this branch is in range. */
14296 stub_entry = NULL;
14297
14298 if (stub_entry != NULL)
14299 {
14300 /* Munge up the value and addend so that we call the stub
14301 rather than the procedure directly. */
14302 asection *stub_sec = stub_entry->group->stub_sec;
14303
14304 if (stub_entry->stub_type == ppc_stub_save_res)
14305 relocation += (stub_sec->output_offset
14306 + stub_sec->output_section->vma
14307 + stub_sec->size - htab->sfpr->size
14308 - htab->sfpr->output_offset
14309 - htab->sfpr->output_section->vma);
14310 else
14311 relocation = (stub_entry->stub_offset
14312 + stub_sec->output_offset
14313 + stub_sec->output_section->vma);
14314 addend = 0;
14315 reloc_dest = DEST_STUB;
14316
14317 if ((stub_entry->stub_type == ppc_stub_plt_call
14318 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14319 && (ALWAYS_EMIT_R2SAVE
14320 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14321 && rel + 1 < relend
14322 && rel[1].r_offset == rel->r_offset + 4
14323 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOCSAVE)
14324 relocation += 4;
14325 }
14326
14327 if (insn != 0)
14328 {
14329 if (is_isa_v2)
14330 {
14331 /* Set 'a' bit. This is 0b00010 in BO field for branch
14332 on CR(BI) insns (BO == 001at or 011at), and 0b01000
14333 for branch on CTR insns (BO == 1a00t or 1a01t). */
14334 if ((insn & (0x14 << 21)) == (0x04 << 21))
14335 insn |= 0x02 << 21;
14336 else if ((insn & (0x14 << 21)) == (0x10 << 21))
14337 insn |= 0x08 << 21;
14338 else
14339 break;
14340 }
14341 else
14342 {
14343 /* Invert 'y' bit if not the default. */
14344 if ((bfd_signed_vma) (relocation + addend - from) < 0)
14345 insn ^= 0x01 << 21;
14346 }
14347
14348 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
14349 }
14350
14351 /* NOP out calls to undefined weak functions.
14352 We can thus call a weak function without first
14353 checking whether the function is defined. */
14354 else if (h != NULL
14355 && h->elf.root.type == bfd_link_hash_undefweak
14356 && h->elf.dynindx == -1
14357 && r_type == R_PPC64_REL24
14358 && relocation == 0
14359 && addend == 0)
14360 {
14361 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
14362 goto copy_reloc;
14363 }
14364 break;
14365 }
14366
14367 /* Set `addend'. */
14368 tls_type = 0;
14369 switch (r_type)
14370 {
14371 default:
14372 info->callbacks->einfo
14373 /* xgettext:c-format */
14374 (_("%P: %B: unknown relocation type %d for `%T'\n"),
14375 input_bfd, (int) r_type, sym_name);
14376
14377 bfd_set_error (bfd_error_bad_value);
14378 ret = FALSE;
14379 goto copy_reloc;
14380
14381 case R_PPC64_NONE:
14382 case R_PPC64_TLS:
14383 case R_PPC64_TLSGD:
14384 case R_PPC64_TLSLD:
14385 case R_PPC64_TOCSAVE:
14386 case R_PPC64_GNU_VTINHERIT:
14387 case R_PPC64_GNU_VTENTRY:
14388 case R_PPC64_ENTRY:
14389 goto copy_reloc;
14390
14391 /* GOT16 relocations. Like an ADDR16 using the symbol's
14392 address in the GOT as relocation value instead of the
14393 symbol's value itself. Also, create a GOT entry for the
14394 symbol and put the symbol value there. */
14395 case R_PPC64_GOT_TLSGD16:
14396 case R_PPC64_GOT_TLSGD16_LO:
14397 case R_PPC64_GOT_TLSGD16_HI:
14398 case R_PPC64_GOT_TLSGD16_HA:
14399 tls_type = TLS_TLS | TLS_GD;
14400 goto dogot;
14401
14402 case R_PPC64_GOT_TLSLD16:
14403 case R_PPC64_GOT_TLSLD16_LO:
14404 case R_PPC64_GOT_TLSLD16_HI:
14405 case R_PPC64_GOT_TLSLD16_HA:
14406 tls_type = TLS_TLS | TLS_LD;
14407 goto dogot;
14408
14409 case R_PPC64_GOT_TPREL16_DS:
14410 case R_PPC64_GOT_TPREL16_LO_DS:
14411 case R_PPC64_GOT_TPREL16_HI:
14412 case R_PPC64_GOT_TPREL16_HA:
14413 tls_type = TLS_TLS | TLS_TPREL;
14414 goto dogot;
14415
14416 case R_PPC64_GOT_DTPREL16_DS:
14417 case R_PPC64_GOT_DTPREL16_LO_DS:
14418 case R_PPC64_GOT_DTPREL16_HI:
14419 case R_PPC64_GOT_DTPREL16_HA:
14420 tls_type = TLS_TLS | TLS_DTPREL;
14421 goto dogot;
14422
14423 case R_PPC64_GOT16:
14424 case R_PPC64_GOT16_LO:
14425 case R_PPC64_GOT16_HI:
14426 case R_PPC64_GOT16_HA:
14427 case R_PPC64_GOT16_DS:
14428 case R_PPC64_GOT16_LO_DS:
14429 dogot:
14430 {
14431 /* Relocation is to the entry for this symbol in the global
14432 offset table. */
14433 asection *got;
14434 bfd_vma *offp;
14435 bfd_vma off;
14436 unsigned long indx = 0;
14437 struct got_entry *ent;
14438
14439 if (tls_type == (TLS_TLS | TLS_LD)
14440 && (h == NULL
14441 || !h->elf.def_dynamic))
14442 ent = ppc64_tlsld_got (input_bfd);
14443 else
14444 {
14445 if (h != NULL)
14446 {
14447 if (!htab->elf.dynamic_sections_created
14448 || h->elf.dynindx == -1
14449 || SYMBOL_REFERENCES_LOCAL (info, &h->elf)
14450 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, &h->elf))
14451 /* This is actually a static link, or it is a
14452 -Bsymbolic link and the symbol is defined
14453 locally, or the symbol was forced to be local
14454 because of a version file. */
14455 ;
14456 else
14457 {
14458 indx = h->elf.dynindx;
14459 unresolved_reloc = FALSE;
14460 }
14461 ent = h->elf.got.glist;
14462 }
14463 else
14464 {
14465 if (local_got_ents == NULL)
14466 abort ();
14467 ent = local_got_ents[r_symndx];
14468 }
14469
14470 for (; ent != NULL; ent = ent->next)
14471 if (ent->addend == orig_rel.r_addend
14472 && ent->owner == input_bfd
14473 && ent->tls_type == tls_type)
14474 break;
14475 }
14476
14477 if (ent == NULL)
14478 abort ();
14479 if (ent->is_indirect)
14480 ent = ent->got.ent;
14481 offp = &ent->got.offset;
14482 got = ppc64_elf_tdata (ent->owner)->got;
14483 if (got == NULL)
14484 abort ();
14485
14486 /* The offset must always be a multiple of 8. We use the
14487 least significant bit to record whether we have already
14488 processed this entry. */
14489 off = *offp;
14490 if ((off & 1) != 0)
14491 off &= ~1;
14492 else
14493 {
14494 /* Generate relocs for the dynamic linker, except in
14495 the case of TLSLD where we'll use one entry per
14496 module. */
14497 asection *relgot;
14498 bfd_boolean ifunc;
14499
14500 *offp = off | 1;
14501 relgot = NULL;
14502 ifunc = (h != NULL
14503 ? h->elf.type == STT_GNU_IFUNC
14504 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC);
14505 if (ifunc)
14506 {
14507 relgot = htab->elf.irelplt;
14508 if (indx == 0)
14509 htab->local_ifunc_resolver = 1;
14510 else if (is_static_defined (&h->elf))
14511 htab->maybe_local_ifunc_resolver = 1;
14512 }
14513 else if (indx != 0
14514 || (bfd_link_pic (info)
14515 && (h == NULL
14516 || !UNDEFWEAK_NO_DYNAMIC_RELOC (info, &h->elf)
14517 || (tls_type == (TLS_TLS | TLS_LD)
14518 && !h->elf.def_dynamic))
14519 && !(tls_type == (TLS_TLS | TLS_TPREL)
14520 && bfd_link_executable (info)
14521 && SYMBOL_REFERENCES_LOCAL (info, &h->elf))))
14522 relgot = ppc64_elf_tdata (ent->owner)->relgot;
14523 if (relgot != NULL)
14524 {
14525 outrel.r_offset = (got->output_section->vma
14526 + got->output_offset
14527 + off);
14528 outrel.r_addend = addend;
14529 if (tls_type & (TLS_LD | TLS_GD))
14530 {
14531 outrel.r_addend = 0;
14532 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
14533 if (tls_type == (TLS_TLS | TLS_GD))
14534 {
14535 loc = relgot->contents;
14536 loc += (relgot->reloc_count++
14537 * sizeof (Elf64_External_Rela));
14538 bfd_elf64_swap_reloca_out (output_bfd,
14539 &outrel, loc);
14540 outrel.r_offset += 8;
14541 outrel.r_addend = addend;
14542 outrel.r_info
14543 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
14544 }
14545 }
14546 else if (tls_type == (TLS_TLS | TLS_DTPREL))
14547 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
14548 else if (tls_type == (TLS_TLS | TLS_TPREL))
14549 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
14550 else if (indx != 0)
14551 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
14552 else
14553 {
14554 if (ifunc)
14555 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
14556 else
14557 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
14558
14559 /* Write the .got section contents for the sake
14560 of prelink. */
14561 loc = got->contents + off;
14562 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
14563 loc);
14564 }
14565
14566 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
14567 {
14568 outrel.r_addend += relocation;
14569 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
14570 {
14571 if (htab->elf.tls_sec == NULL)
14572 outrel.r_addend = 0;
14573 else
14574 outrel.r_addend -= htab->elf.tls_sec->vma;
14575 }
14576 }
14577 loc = relgot->contents;
14578 loc += (relgot->reloc_count++
14579 * sizeof (Elf64_External_Rela));
14580 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
14581 }
14582
14583 /* Init the .got section contents here if we're not
14584 emitting a reloc. */
14585 else
14586 {
14587 relocation += addend;
14588 if (tls_type != 0)
14589 {
14590 if (htab->elf.tls_sec == NULL)
14591 relocation = 0;
14592 else
14593 {
14594 if (tls_type & TLS_LD)
14595 relocation = 0;
14596 else
14597 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
14598 if (tls_type & TLS_TPREL)
14599 relocation += DTP_OFFSET - TP_OFFSET;
14600 }
14601
14602 if (tls_type & (TLS_GD | TLS_LD))
14603 {
14604 bfd_put_64 (output_bfd, relocation,
14605 got->contents + off + 8);
14606 relocation = 1;
14607 }
14608 }
14609 bfd_put_64 (output_bfd, relocation,
14610 got->contents + off);
14611 }
14612 }
14613
14614 if (off >= (bfd_vma) -2)
14615 abort ();
14616
14617 relocation = got->output_section->vma + got->output_offset + off;
14618 addend = -(TOCstart + htab->sec_info[input_section->id].toc_off);
14619 }
14620 break;
14621
14622 case R_PPC64_PLT16_HA:
14623 case R_PPC64_PLT16_HI:
14624 case R_PPC64_PLT16_LO:
14625 case R_PPC64_PLT32:
14626 case R_PPC64_PLT64:
14627 /* Relocation is to the entry for this symbol in the
14628 procedure linkage table. */
14629 {
14630 struct plt_entry **plt_list = NULL;
14631 if (h != NULL)
14632 plt_list = &h->elf.plt.plist;
14633 else if (local_got_ents != NULL)
14634 {
14635 struct plt_entry **local_plt = (struct plt_entry **)
14636 (local_got_ents + symtab_hdr->sh_info);
14637 unsigned char *local_got_tls_masks = (unsigned char *)
14638 (local_plt + symtab_hdr->sh_info);
14639 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
14640 plt_list = local_plt + r_symndx;
14641 }
14642 if (plt_list)
14643 {
14644 struct plt_entry *ent;
14645
14646 for (ent = *plt_list; ent != NULL; ent = ent->next)
14647 if (ent->plt.offset != (bfd_vma) -1
14648 && ent->addend == orig_rel.r_addend)
14649 {
14650 asection *plt;
14651
14652 plt = htab->elf.splt;
14653 if (!htab->elf.dynamic_sections_created
14654 || h == NULL
14655 || h->elf.dynindx == -1)
14656 plt = htab->elf.iplt;
14657 relocation = (plt->output_section->vma
14658 + plt->output_offset
14659 + ent->plt.offset);
14660 addend = 0;
14661 unresolved_reloc = FALSE;
14662 break;
14663 }
14664 }
14665 }
14666 break;
14667
14668 case R_PPC64_TOC:
14669 /* Relocation value is TOC base. */
14670 relocation = TOCstart;
14671 if (r_symndx == STN_UNDEF)
14672 relocation += htab->sec_info[input_section->id].toc_off;
14673 else if (unresolved_reloc)
14674 ;
14675 else if (sec != NULL && sec->id < htab->sec_info_arr_size)
14676 relocation += htab->sec_info[sec->id].toc_off;
14677 else
14678 unresolved_reloc = TRUE;
14679 goto dodyn;
14680
14681 /* TOC16 relocs. We want the offset relative to the TOC base,
14682 which is the address of the start of the TOC plus 0x8000.
14683 The TOC consists of sections .got, .toc, .tocbss, and .plt,
14684 in this order. */
14685 case R_PPC64_TOC16:
14686 case R_PPC64_TOC16_LO:
14687 case R_PPC64_TOC16_HI:
14688 case R_PPC64_TOC16_DS:
14689 case R_PPC64_TOC16_LO_DS:
14690 case R_PPC64_TOC16_HA:
14691 addend -= TOCstart + htab->sec_info[input_section->id].toc_off;
14692 break;
14693
14694 /* Relocate against the beginning of the section. */
14695 case R_PPC64_SECTOFF:
14696 case R_PPC64_SECTOFF_LO:
14697 case R_PPC64_SECTOFF_HI:
14698 case R_PPC64_SECTOFF_DS:
14699 case R_PPC64_SECTOFF_LO_DS:
14700 case R_PPC64_SECTOFF_HA:
14701 if (sec != NULL)
14702 addend -= sec->output_section->vma;
14703 break;
14704
14705 case R_PPC64_REL16:
14706 case R_PPC64_REL16_LO:
14707 case R_PPC64_REL16_HI:
14708 case R_PPC64_REL16_HA:
14709 case R_PPC64_REL16DX_HA:
14710 break;
14711
14712 case R_PPC64_REL14:
14713 case R_PPC64_REL14_BRNTAKEN:
14714 case R_PPC64_REL14_BRTAKEN:
14715 case R_PPC64_REL24:
14716 break;
14717
14718 case R_PPC64_TPREL16:
14719 case R_PPC64_TPREL16_LO:
14720 case R_PPC64_TPREL16_HI:
14721 case R_PPC64_TPREL16_HA:
14722 case R_PPC64_TPREL16_DS:
14723 case R_PPC64_TPREL16_LO_DS:
14724 case R_PPC64_TPREL16_HIGH:
14725 case R_PPC64_TPREL16_HIGHA:
14726 case R_PPC64_TPREL16_HIGHER:
14727 case R_PPC64_TPREL16_HIGHERA:
14728 case R_PPC64_TPREL16_HIGHEST:
14729 case R_PPC64_TPREL16_HIGHESTA:
14730 if (h != NULL
14731 && h->elf.root.type == bfd_link_hash_undefweak
14732 && h->elf.dynindx == -1)
14733 {
14734 /* Make this relocation against an undefined weak symbol
14735 resolve to zero. This is really just a tweak, since
14736 code using weak externs ought to check that they are
14737 defined before using them. */
14738 bfd_byte *p = contents + rel->r_offset - d_offset;
14739
14740 insn = bfd_get_32 (input_bfd, p);
14741 insn = _bfd_elf_ppc_at_tprel_transform (insn, 13);
14742 if (insn != 0)
14743 bfd_put_32 (input_bfd, insn, p);
14744 break;
14745 }
14746 if (htab->elf.tls_sec != NULL)
14747 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
14748 /* The TPREL16 relocs shouldn't really be used in shared
14749 libs or with non-local symbols as that will result in
14750 DT_TEXTREL being set, but support them anyway. */
14751 goto dodyn;
14752
14753 case R_PPC64_DTPREL16:
14754 case R_PPC64_DTPREL16_LO:
14755 case R_PPC64_DTPREL16_HI:
14756 case R_PPC64_DTPREL16_HA:
14757 case R_PPC64_DTPREL16_DS:
14758 case R_PPC64_DTPREL16_LO_DS:
14759 case R_PPC64_DTPREL16_HIGH:
14760 case R_PPC64_DTPREL16_HIGHA:
14761 case R_PPC64_DTPREL16_HIGHER:
14762 case R_PPC64_DTPREL16_HIGHERA:
14763 case R_PPC64_DTPREL16_HIGHEST:
14764 case R_PPC64_DTPREL16_HIGHESTA:
14765 if (htab->elf.tls_sec != NULL)
14766 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
14767 break;
14768
14769 case R_PPC64_ADDR64_LOCAL:
14770 addend += PPC64_LOCAL_ENTRY_OFFSET (h != NULL
14771 ? h->elf.other
14772 : sym->st_other);
14773 break;
14774
14775 case R_PPC64_DTPMOD64:
14776 relocation = 1;
14777 addend = 0;
14778 goto dodyn;
14779
14780 case R_PPC64_TPREL64:
14781 if (htab->elf.tls_sec != NULL)
14782 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
14783 goto dodyn;
14784
14785 case R_PPC64_DTPREL64:
14786 if (htab->elf.tls_sec != NULL)
14787 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
14788 /* Fall through. */
14789
14790 /* Relocations that may need to be propagated if this is a
14791 dynamic object. */
14792 case R_PPC64_REL30:
14793 case R_PPC64_REL32:
14794 case R_PPC64_REL64:
14795 case R_PPC64_ADDR14:
14796 case R_PPC64_ADDR14_BRNTAKEN:
14797 case R_PPC64_ADDR14_BRTAKEN:
14798 case R_PPC64_ADDR16:
14799 case R_PPC64_ADDR16_DS:
14800 case R_PPC64_ADDR16_HA:
14801 case R_PPC64_ADDR16_HI:
14802 case R_PPC64_ADDR16_HIGH:
14803 case R_PPC64_ADDR16_HIGHA:
14804 case R_PPC64_ADDR16_HIGHER:
14805 case R_PPC64_ADDR16_HIGHERA:
14806 case R_PPC64_ADDR16_HIGHEST:
14807 case R_PPC64_ADDR16_HIGHESTA:
14808 case R_PPC64_ADDR16_LO:
14809 case R_PPC64_ADDR16_LO_DS:
14810 case R_PPC64_ADDR24:
14811 case R_PPC64_ADDR32:
14812 case R_PPC64_ADDR64:
14813 case R_PPC64_UADDR16:
14814 case R_PPC64_UADDR32:
14815 case R_PPC64_UADDR64:
14816 dodyn:
14817 if ((input_section->flags & SEC_ALLOC) == 0)
14818 break;
14819
14820 if (NO_OPD_RELOCS && is_opd)
14821 break;
14822
14823 if (bfd_link_pic (info)
14824 ? ((h == NULL
14825 || h->dyn_relocs != NULL)
14826 && ((h != NULL && pc_dynrelocs (h))
14827 || must_be_dyn_reloc (info, r_type)))
14828 : (h != NULL
14829 ? h->dyn_relocs != NULL
14830 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
14831 {
14832 bfd_boolean skip, relocate;
14833 asection *sreloc;
14834 bfd_vma out_off;
14835 long indx = 0;
14836
14837 /* When generating a dynamic object, these relocations
14838 are copied into the output file to be resolved at run
14839 time. */
14840
14841 skip = FALSE;
14842 relocate = FALSE;
14843
14844 out_off = _bfd_elf_section_offset (output_bfd, info,
14845 input_section, rel->r_offset);
14846 if (out_off == (bfd_vma) -1)
14847 skip = TRUE;
14848 else if (out_off == (bfd_vma) -2)
14849 skip = TRUE, relocate = TRUE;
14850 out_off += (input_section->output_section->vma
14851 + input_section->output_offset);
14852 outrel.r_offset = out_off;
14853 outrel.r_addend = rel->r_addend;
14854
14855 /* Optimize unaligned reloc use. */
14856 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
14857 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
14858 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
14859 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
14860 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
14861 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
14862 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
14863 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
14864 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
14865
14866 if (skip)
14867 memset (&outrel, 0, sizeof outrel);
14868 else if (!SYMBOL_REFERENCES_LOCAL (info, &h->elf)
14869 && !is_opd
14870 && r_type != R_PPC64_TOC)
14871 {
14872 indx = h->elf.dynindx;
14873 BFD_ASSERT (indx != -1);
14874 outrel.r_info = ELF64_R_INFO (indx, r_type);
14875 }
14876 else
14877 {
14878 /* This symbol is local, or marked to become local,
14879 or this is an opd section reloc which must point
14880 at a local function. */
14881 outrel.r_addend += relocation;
14882 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
14883 {
14884 if (is_opd && h != NULL)
14885 {
14886 /* Lie about opd entries. This case occurs
14887 when building shared libraries and we
14888 reference a function in another shared
14889 lib. The same thing happens for a weak
14890 definition in an application that's
14891 overridden by a strong definition in a
14892 shared lib. (I believe this is a generic
14893 bug in binutils handling of weak syms.)
14894 In these cases we won't use the opd
14895 entry in this lib. */
14896 unresolved_reloc = FALSE;
14897 }
14898 if (!is_opd
14899 && r_type == R_PPC64_ADDR64
14900 && (h != NULL
14901 ? h->elf.type == STT_GNU_IFUNC
14902 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
14903 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
14904 else
14905 {
14906 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
14907
14908 /* We need to relocate .opd contents for ld.so.
14909 Prelink also wants simple and consistent rules
14910 for relocs. This make all RELATIVE relocs have
14911 *r_offset equal to r_addend. */
14912 relocate = TRUE;
14913 }
14914 }
14915 else
14916 {
14917 if (h != NULL
14918 ? h->elf.type == STT_GNU_IFUNC
14919 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
14920 {
14921 info->callbacks->einfo
14922 /* xgettext:c-format */
14923 (_("%H: %s for indirect "
14924 "function `%T' unsupported\n"),
14925 input_bfd, input_section, rel->r_offset,
14926 ppc64_elf_howto_table[r_type]->name,
14927 sym_name);
14928 ret = FALSE;
14929 }
14930 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
14931 ;
14932 else if (sec == NULL || sec->owner == NULL)
14933 {
14934 bfd_set_error (bfd_error_bad_value);
14935 return FALSE;
14936 }
14937 else
14938 {
14939 asection *osec;
14940
14941 osec = sec->output_section;
14942 indx = elf_section_data (osec)->dynindx;
14943
14944 if (indx == 0)
14945 {
14946 if ((osec->flags & SEC_READONLY) == 0
14947 && htab->elf.data_index_section != NULL)
14948 osec = htab->elf.data_index_section;
14949 else
14950 osec = htab->elf.text_index_section;
14951 indx = elf_section_data (osec)->dynindx;
14952 }
14953 BFD_ASSERT (indx != 0);
14954
14955 /* We are turning this relocation into one
14956 against a section symbol, so subtract out
14957 the output section's address but not the
14958 offset of the input section in the output
14959 section. */
14960 outrel.r_addend -= osec->vma;
14961 }
14962
14963 outrel.r_info = ELF64_R_INFO (indx, r_type);
14964 }
14965 }
14966
14967 sreloc = elf_section_data (input_section)->sreloc;
14968 if (h != NULL
14969 ? h->elf.type == STT_GNU_IFUNC
14970 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
14971 {
14972 sreloc = htab->elf.irelplt;
14973 if (indx == 0)
14974 htab->local_ifunc_resolver = 1;
14975 else if (is_static_defined (&h->elf))
14976 htab->maybe_local_ifunc_resolver = 1;
14977 }
14978 if (sreloc == NULL)
14979 abort ();
14980
14981 if (sreloc->reloc_count * sizeof (Elf64_External_Rela)
14982 >= sreloc->size)
14983 abort ();
14984 loc = sreloc->contents;
14985 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
14986 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
14987
14988 /* If this reloc is against an external symbol, it will
14989 be computed at runtime, so there's no need to do
14990 anything now. However, for the sake of prelink ensure
14991 that the section contents are a known value. */
14992 if (! relocate)
14993 {
14994 unresolved_reloc = FALSE;
14995 /* The value chosen here is quite arbitrary as ld.so
14996 ignores section contents except for the special
14997 case of .opd where the contents might be accessed
14998 before relocation. Choose zero, as that won't
14999 cause reloc overflow. */
15000 relocation = 0;
15001 addend = 0;
15002 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
15003 to improve backward compatibility with older
15004 versions of ld. */
15005 if (r_type == R_PPC64_ADDR64)
15006 addend = outrel.r_addend;
15007 /* Adjust pc_relative relocs to have zero in *r_offset. */
15008 else if (ppc64_elf_howto_table[r_type]->pc_relative)
15009 addend = outrel.r_offset;
15010 }
15011 }
15012 break;
15013
15014 case R_PPC64_COPY:
15015 case R_PPC64_GLOB_DAT:
15016 case R_PPC64_JMP_SLOT:
15017 case R_PPC64_JMP_IREL:
15018 case R_PPC64_RELATIVE:
15019 /* We shouldn't ever see these dynamic relocs in relocatable
15020 files. */
15021 /* Fall through. */
15022
15023 case R_PPC64_PLTGOT16:
15024 case R_PPC64_PLTGOT16_DS:
15025 case R_PPC64_PLTGOT16_HA:
15026 case R_PPC64_PLTGOT16_HI:
15027 case R_PPC64_PLTGOT16_LO:
15028 case R_PPC64_PLTGOT16_LO_DS:
15029 case R_PPC64_PLTREL32:
15030 case R_PPC64_PLTREL64:
15031 /* These ones haven't been implemented yet. */
15032
15033 info->callbacks->einfo
15034 /* xgettext:c-format */
15035 (_("%P: %B: %s is not supported for `%T'\n"),
15036 input_bfd,
15037 ppc64_elf_howto_table[r_type]->name, sym_name);
15038
15039 bfd_set_error (bfd_error_invalid_operation);
15040 ret = FALSE;
15041 goto copy_reloc;
15042 }
15043
15044 /* Multi-instruction sequences that access the TOC can be
15045 optimized, eg. addis ra,r2,0; addi rb,ra,x;
15046 to nop; addi rb,r2,x; */
15047 howto = ppc64_elf_howto_table[(int) r_type];
15048 switch (r_type)
15049 {
15050 default:
15051 break;
15052
15053 case R_PPC64_GOT_TLSLD16_HI:
15054 case R_PPC64_GOT_TLSGD16_HI:
15055 case R_PPC64_GOT_TPREL16_HI:
15056 case R_PPC64_GOT_DTPREL16_HI:
15057 case R_PPC64_GOT16_HI:
15058 case R_PPC64_TOC16_HI:
15059 /* These relocs would only be useful if building up an
15060 offset to later add to r2, perhaps in an indexed
15061 addressing mode instruction. Don't try to optimize.
15062 Unfortunately, the possibility of someone building up an
15063 offset like this or even with the HA relocs, means that
15064 we need to check the high insn when optimizing the low
15065 insn. */
15066 break;
15067
15068 case R_PPC64_GOT_TLSLD16_HA:
15069 case R_PPC64_GOT_TLSGD16_HA:
15070 case R_PPC64_GOT_TPREL16_HA:
15071 case R_PPC64_GOT_DTPREL16_HA:
15072 case R_PPC64_GOT16_HA:
15073 case R_PPC64_TOC16_HA:
15074 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
15075 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
15076 {
15077 bfd_byte *p = contents + (rel->r_offset & ~3);
15078 bfd_put_32 (input_bfd, NOP, p);
15079 }
15080 break;
15081
15082 case R_PPC64_GOT_TLSLD16_LO:
15083 case R_PPC64_GOT_TLSGD16_LO:
15084 case R_PPC64_GOT_TPREL16_LO_DS:
15085 case R_PPC64_GOT_DTPREL16_LO_DS:
15086 case R_PPC64_GOT16_LO:
15087 case R_PPC64_GOT16_LO_DS:
15088 case R_PPC64_TOC16_LO:
15089 case R_PPC64_TOC16_LO_DS:
15090 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
15091 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
15092 {
15093 bfd_byte *p = contents + (rel->r_offset & ~3);
15094 insn = bfd_get_32 (input_bfd, p);
15095 if ((insn & (0x3f << 26)) == 12u << 26 /* addic */)
15096 {
15097 /* Transform addic to addi when we change reg. */
15098 insn &= ~((0x3f << 26) | (0x1f << 16));
15099 insn |= (14u << 26) | (2 << 16);
15100 }
15101 else
15102 {
15103 insn &= ~(0x1f << 16);
15104 insn |= 2 << 16;
15105 }
15106 bfd_put_32 (input_bfd, insn, p);
15107 }
15108 break;
15109
15110 case R_PPC64_TPREL16_HA:
15111 if (htab->do_tls_opt && relocation + addend + 0x8000 < 0x10000)
15112 {
15113 bfd_byte *p = contents + (rel->r_offset & ~3);
15114 insn = bfd_get_32 (input_bfd, p);
15115 if ((insn & ((0x3f << 26) | 0x1f << 16))
15116 != ((15u << 26) | (13 << 16)) /* addis rt,13,imm */)
15117 /* xgettext:c-format */
15118 info->callbacks->minfo
15119 (_("%H: warning: %s unexpected insn %#x.\n"),
15120 input_bfd, input_section, rel->r_offset, howto->name, insn);
15121 else
15122 bfd_put_32 (input_bfd, NOP, p);
15123 }
15124 break;
15125
15126 case R_PPC64_TPREL16_LO:
15127 case R_PPC64_TPREL16_LO_DS:
15128 if (htab->do_tls_opt && relocation + addend + 0x8000 < 0x10000)
15129 {
15130 bfd_byte *p = contents + (rel->r_offset & ~3);
15131 insn = bfd_get_32 (input_bfd, p);
15132 insn &= ~(0x1f << 16);
15133 insn |= 13 << 16;
15134 bfd_put_32 (input_bfd, insn, p);
15135 }
15136 break;
15137 }
15138
15139 /* Do any further special processing. */
15140 switch (r_type)
15141 {
15142 default:
15143 break;
15144
15145 case R_PPC64_REL16_HA:
15146 case R_PPC64_REL16DX_HA:
15147 case R_PPC64_ADDR16_HA:
15148 case R_PPC64_ADDR16_HIGHA:
15149 case R_PPC64_ADDR16_HIGHERA:
15150 case R_PPC64_ADDR16_HIGHESTA:
15151 case R_PPC64_TOC16_HA:
15152 case R_PPC64_SECTOFF_HA:
15153 case R_PPC64_TPREL16_HA:
15154 case R_PPC64_TPREL16_HIGHA:
15155 case R_PPC64_TPREL16_HIGHERA:
15156 case R_PPC64_TPREL16_HIGHESTA:
15157 case R_PPC64_DTPREL16_HA:
15158 case R_PPC64_DTPREL16_HIGHA:
15159 case R_PPC64_DTPREL16_HIGHERA:
15160 case R_PPC64_DTPREL16_HIGHESTA:
15161 /* It's just possible that this symbol is a weak symbol
15162 that's not actually defined anywhere. In that case,
15163 'sec' would be NULL, and we should leave the symbol
15164 alone (it will be set to zero elsewhere in the link). */
15165 if (sec == NULL)
15166 break;
15167 /* Fall through. */
15168
15169 case R_PPC64_GOT16_HA:
15170 case R_PPC64_PLTGOT16_HA:
15171 case R_PPC64_PLT16_HA:
15172 case R_PPC64_GOT_TLSGD16_HA:
15173 case R_PPC64_GOT_TLSLD16_HA:
15174 case R_PPC64_GOT_TPREL16_HA:
15175 case R_PPC64_GOT_DTPREL16_HA:
15176 /* Add 0x10000 if sign bit in 0:15 is set.
15177 Bits 0:15 are not used. */
15178 addend += 0x8000;
15179 break;
15180
15181 case R_PPC64_ADDR16_DS:
15182 case R_PPC64_ADDR16_LO_DS:
15183 case R_PPC64_GOT16_DS:
15184 case R_PPC64_GOT16_LO_DS:
15185 case R_PPC64_PLT16_LO_DS:
15186 case R_PPC64_SECTOFF_DS:
15187 case R_PPC64_SECTOFF_LO_DS:
15188 case R_PPC64_TOC16_DS:
15189 case R_PPC64_TOC16_LO_DS:
15190 case R_PPC64_PLTGOT16_DS:
15191 case R_PPC64_PLTGOT16_LO_DS:
15192 case R_PPC64_GOT_TPREL16_DS:
15193 case R_PPC64_GOT_TPREL16_LO_DS:
15194 case R_PPC64_GOT_DTPREL16_DS:
15195 case R_PPC64_GOT_DTPREL16_LO_DS:
15196 case R_PPC64_TPREL16_DS:
15197 case R_PPC64_TPREL16_LO_DS:
15198 case R_PPC64_DTPREL16_DS:
15199 case R_PPC64_DTPREL16_LO_DS:
15200 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
15201 mask = 3;
15202 /* If this reloc is against an lq, lxv, or stxv insn, then
15203 the value must be a multiple of 16. This is somewhat of
15204 a hack, but the "correct" way to do this by defining _DQ
15205 forms of all the _DS relocs bloats all reloc switches in
15206 this file. It doesn't make much sense to use these
15207 relocs in data, so testing the insn should be safe. */
15208 if ((insn & (0x3f << 26)) == (56u << 26)
15209 || ((insn & (0x3f << 26)) == (61u << 26) && (insn & 3) == 1))
15210 mask = 15;
15211 relocation += addend;
15212 addend = insn & (mask ^ 3);
15213 if ((relocation & mask) != 0)
15214 {
15215 relocation ^= relocation & mask;
15216 info->callbacks->einfo
15217 /* xgettext:c-format */
15218 (_("%H: error: %s not a multiple of %u\n"),
15219 input_bfd, input_section, rel->r_offset,
15220 howto->name,
15221 mask + 1);
15222 bfd_set_error (bfd_error_bad_value);
15223 ret = FALSE;
15224 goto copy_reloc;
15225 }
15226 break;
15227 }
15228
15229 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
15230 because such sections are not SEC_ALLOC and thus ld.so will
15231 not process them. */
15232 if (unresolved_reloc
15233 && !((input_section->flags & SEC_DEBUGGING) != 0
15234 && h->elf.def_dynamic)
15235 && _bfd_elf_section_offset (output_bfd, info, input_section,
15236 rel->r_offset) != (bfd_vma) -1)
15237 {
15238 info->callbacks->einfo
15239 /* xgettext:c-format */
15240 (_("%H: unresolvable %s against `%T'\n"),
15241 input_bfd, input_section, rel->r_offset,
15242 howto->name,
15243 h->elf.root.root.string);
15244 ret = FALSE;
15245 }
15246
15247 /* 16-bit fields in insns mostly have signed values, but a
15248 few insns have 16-bit unsigned values. Really, we should
15249 have different reloc types. */
15250 if (howto->complain_on_overflow != complain_overflow_dont
15251 && howto->dst_mask == 0xffff
15252 && (input_section->flags & SEC_CODE) != 0)
15253 {
15254 enum complain_overflow complain = complain_overflow_signed;
15255
15256 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
15257 if ((insn & (0x3f << 26)) == 10u << 26 /* cmpli */)
15258 complain = complain_overflow_bitfield;
15259 else if (howto->rightshift == 0
15260 ? ((insn & (0x3f << 26)) == 28u << 26 /* andi */
15261 || (insn & (0x3f << 26)) == 24u << 26 /* ori */
15262 || (insn & (0x3f << 26)) == 26u << 26 /* xori */)
15263 : ((insn & (0x3f << 26)) == 29u << 26 /* andis */
15264 || (insn & (0x3f << 26)) == 25u << 26 /* oris */
15265 || (insn & (0x3f << 26)) == 27u << 26 /* xoris */))
15266 complain = complain_overflow_unsigned;
15267 if (howto->complain_on_overflow != complain)
15268 {
15269 alt_howto = *howto;
15270 alt_howto.complain_on_overflow = complain;
15271 howto = &alt_howto;
15272 }
15273 }
15274
15275 if (r_type == R_PPC64_REL16DX_HA)
15276 {
15277 /* Split field reloc isn't handled by _bfd_final_link_relocate. */
15278 if (rel->r_offset + 4 > input_section->size)
15279 r = bfd_reloc_outofrange;
15280 else
15281 {
15282 relocation += addend;
15283 relocation -= (rel->r_offset
15284 + input_section->output_offset
15285 + input_section->output_section->vma);
15286 relocation = (bfd_signed_vma) relocation >> 16;
15287 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
15288 insn &= ~0x1fffc1;
15289 insn |= (relocation & 0xffc1) | ((relocation & 0x3e) << 15);
15290 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
15291 r = bfd_reloc_ok;
15292 if (relocation + 0x8000 > 0xffff)
15293 r = bfd_reloc_overflow;
15294 }
15295 }
15296 else
15297 r = _bfd_final_link_relocate (howto, input_bfd, input_section, contents,
15298 rel->r_offset, relocation, addend);
15299
15300 if (r != bfd_reloc_ok)
15301 {
15302 char *more_info = NULL;
15303 const char *reloc_name = howto->name;
15304
15305 if (reloc_dest != DEST_NORMAL)
15306 {
15307 more_info = bfd_malloc (strlen (reloc_name) + 8);
15308 if (more_info != NULL)
15309 {
15310 strcpy (more_info, reloc_name);
15311 strcat (more_info, (reloc_dest == DEST_OPD
15312 ? " (OPD)" : " (stub)"));
15313 reloc_name = more_info;
15314 }
15315 }
15316
15317 if (r == bfd_reloc_overflow)
15318 {
15319 /* On code like "if (foo) foo();" don't report overflow
15320 on a branch to zero when foo is undefined. */
15321 if (!warned
15322 && (reloc_dest == DEST_STUB
15323 || !(h != NULL
15324 && (h->elf.root.type == bfd_link_hash_undefweak
15325 || h->elf.root.type == bfd_link_hash_undefined)
15326 && is_branch_reloc (r_type))))
15327 info->callbacks->reloc_overflow (info, &h->elf.root,
15328 sym_name, reloc_name,
15329 orig_rel.r_addend,
15330 input_bfd, input_section,
15331 rel->r_offset);
15332 }
15333 else
15334 {
15335 info->callbacks->einfo
15336 /* xgettext:c-format */
15337 (_("%H: %s against `%T': error %d\n"),
15338 input_bfd, input_section, rel->r_offset,
15339 reloc_name, sym_name, (int) r);
15340 ret = FALSE;
15341 }
15342 if (more_info != NULL)
15343 free (more_info);
15344 }
15345 copy_reloc:
15346 if (wrel != rel)
15347 *wrel = *rel;
15348 }
15349
15350 if (wrel != rel)
15351 {
15352 Elf_Internal_Shdr *rel_hdr;
15353 size_t deleted = rel - wrel;
15354
15355 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
15356 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
15357 if (rel_hdr->sh_size == 0)
15358 {
15359 /* It is too late to remove an empty reloc section. Leave
15360 one NONE reloc.
15361 ??? What is wrong with an empty section??? */
15362 rel_hdr->sh_size = rel_hdr->sh_entsize;
15363 deleted -= 1;
15364 }
15365 rel_hdr = _bfd_elf_single_rel_hdr (input_section);
15366 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
15367 input_section->reloc_count -= deleted;
15368 }
15369
15370 /* If we're emitting relocations, then shortly after this function
15371 returns, reloc offsets and addends for this section will be
15372 adjusted. Worse, reloc symbol indices will be for the output
15373 file rather than the input. Save a copy of the relocs for
15374 opd_entry_value. */
15375 if (is_opd && (info->emitrelocations || bfd_link_relocatable (info)))
15376 {
15377 bfd_size_type amt;
15378 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
15379 rel = bfd_alloc (input_bfd, amt);
15380 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd.relocs == NULL);
15381 ppc64_elf_tdata (input_bfd)->opd.relocs = rel;
15382 if (rel == NULL)
15383 return FALSE;
15384 memcpy (rel, relocs, amt);
15385 }
15386 return ret;
15387 }
15388
15389 /* Adjust the value of any local symbols in opd sections. */
15390
15391 static int
15392 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
15393 const char *name ATTRIBUTE_UNUSED,
15394 Elf_Internal_Sym *elfsym,
15395 asection *input_sec,
15396 struct elf_link_hash_entry *h)
15397 {
15398 struct _opd_sec_data *opd;
15399 long adjust;
15400 bfd_vma value;
15401
15402 if (h != NULL)
15403 return 1;
15404
15405 opd = get_opd_info (input_sec);
15406 if (opd == NULL || opd->adjust == NULL)
15407 return 1;
15408
15409 value = elfsym->st_value - input_sec->output_offset;
15410 if (!bfd_link_relocatable (info))
15411 value -= input_sec->output_section->vma;
15412
15413 adjust = opd->adjust[OPD_NDX (value)];
15414 if (adjust == -1)
15415 return 2;
15416
15417 elfsym->st_value += adjust;
15418 return 1;
15419 }
15420
15421 /* Finish up dynamic symbol handling. We set the contents of various
15422 dynamic sections here. */
15423
15424 static bfd_boolean
15425 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
15426 struct bfd_link_info *info,
15427 struct elf_link_hash_entry *h,
15428 Elf_Internal_Sym *sym)
15429 {
15430 struct ppc_link_hash_table *htab;
15431 struct plt_entry *ent;
15432 Elf_Internal_Rela rela;
15433 bfd_byte *loc;
15434
15435 htab = ppc_hash_table (info);
15436 if (htab == NULL)
15437 return FALSE;
15438
15439 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
15440 if (ent->plt.offset != (bfd_vma) -1)
15441 {
15442 /* This symbol has an entry in the procedure linkage
15443 table. Set it up. */
15444 if (!htab->elf.dynamic_sections_created
15445 || h->dynindx == -1)
15446 {
15447 BFD_ASSERT (h->type == STT_GNU_IFUNC
15448 && h->def_regular
15449 && (h->root.type == bfd_link_hash_defined
15450 || h->root.type == bfd_link_hash_defweak));
15451 rela.r_offset = (htab->elf.iplt->output_section->vma
15452 + htab->elf.iplt->output_offset
15453 + ent->plt.offset);
15454 if (htab->opd_abi)
15455 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
15456 else
15457 rela.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
15458 rela.r_addend = (h->root.u.def.value
15459 + h->root.u.def.section->output_offset
15460 + h->root.u.def.section->output_section->vma
15461 + ent->addend);
15462 loc = (htab->elf.irelplt->contents
15463 + (htab->elf.irelplt->reloc_count++
15464 * sizeof (Elf64_External_Rela)));
15465 htab->local_ifunc_resolver = 1;
15466 }
15467 else
15468 {
15469 rela.r_offset = (htab->elf.splt->output_section->vma
15470 + htab->elf.splt->output_offset
15471 + ent->plt.offset);
15472 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
15473 rela.r_addend = ent->addend;
15474 loc = (htab->elf.srelplt->contents
15475 + ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE (htab))
15476 / PLT_ENTRY_SIZE (htab) * sizeof (Elf64_External_Rela)));
15477 if (h->type == STT_GNU_IFUNC && is_static_defined (h))
15478 htab->maybe_local_ifunc_resolver = 1;
15479 }
15480 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
15481
15482 if (!htab->opd_abi)
15483 {
15484 if (!h->def_regular)
15485 {
15486 /* Mark the symbol as undefined, rather than as
15487 defined in glink. Leave the value if there were
15488 any relocations where pointer equality matters
15489 (this is a clue for the dynamic linker, to make
15490 function pointer comparisons work between an
15491 application and shared library), otherwise set it
15492 to zero. */
15493 sym->st_shndx = SHN_UNDEF;
15494 if (!h->pointer_equality_needed)
15495 sym->st_value = 0;
15496 else if (!h->ref_regular_nonweak)
15497 {
15498 /* This breaks function pointer comparisons, but
15499 that is better than breaking tests for a NULL
15500 function pointer. */
15501 sym->st_value = 0;
15502 }
15503 }
15504 }
15505 }
15506
15507 if (h->needs_copy)
15508 {
15509 /* This symbol needs a copy reloc. Set it up. */
15510 asection *srel;
15511
15512 if (h->dynindx == -1
15513 || (h->root.type != bfd_link_hash_defined
15514 && h->root.type != bfd_link_hash_defweak)
15515 || htab->elf.srelbss == NULL
15516 || htab->elf.sreldynrelro == NULL)
15517 abort ();
15518
15519 rela.r_offset = (h->root.u.def.value
15520 + h->root.u.def.section->output_section->vma
15521 + h->root.u.def.section->output_offset);
15522 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
15523 rela.r_addend = 0;
15524 if (h->root.u.def.section == htab->elf.sdynrelro)
15525 srel = htab->elf.sreldynrelro;
15526 else
15527 srel = htab->elf.srelbss;
15528 loc = srel->contents;
15529 loc += srel->reloc_count++ * sizeof (Elf64_External_Rela);
15530 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
15531 }
15532
15533 return TRUE;
15534 }
15535
15536 /* Used to decide how to sort relocs in an optimal manner for the
15537 dynamic linker, before writing them out. */
15538
15539 static enum elf_reloc_type_class
15540 ppc64_elf_reloc_type_class (const struct bfd_link_info *info,
15541 const asection *rel_sec,
15542 const Elf_Internal_Rela *rela)
15543 {
15544 enum elf_ppc64_reloc_type r_type;
15545 struct ppc_link_hash_table *htab = ppc_hash_table (info);
15546
15547 if (rel_sec == htab->elf.irelplt)
15548 return reloc_class_ifunc;
15549
15550 r_type = ELF64_R_TYPE (rela->r_info);
15551 switch (r_type)
15552 {
15553 case R_PPC64_RELATIVE:
15554 return reloc_class_relative;
15555 case R_PPC64_JMP_SLOT:
15556 return reloc_class_plt;
15557 case R_PPC64_COPY:
15558 return reloc_class_copy;
15559 default:
15560 return reloc_class_normal;
15561 }
15562 }
15563
15564 /* Finish up the dynamic sections. */
15565
15566 static bfd_boolean
15567 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
15568 struct bfd_link_info *info)
15569 {
15570 struct ppc_link_hash_table *htab;
15571 bfd *dynobj;
15572 asection *sdyn;
15573
15574 htab = ppc_hash_table (info);
15575 if (htab == NULL)
15576 return FALSE;
15577
15578 dynobj = htab->elf.dynobj;
15579 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
15580
15581 if (htab->elf.dynamic_sections_created)
15582 {
15583 Elf64_External_Dyn *dyncon, *dynconend;
15584
15585 if (sdyn == NULL || htab->elf.sgot == NULL)
15586 abort ();
15587
15588 dyncon = (Elf64_External_Dyn *) sdyn->contents;
15589 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
15590 for (; dyncon < dynconend; dyncon++)
15591 {
15592 Elf_Internal_Dyn dyn;
15593 asection *s;
15594
15595 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
15596
15597 switch (dyn.d_tag)
15598 {
15599 default:
15600 continue;
15601
15602 case DT_PPC64_GLINK:
15603 s = htab->glink;
15604 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15605 /* We stupidly defined DT_PPC64_GLINK to be the start
15606 of glink rather than the first entry point, which is
15607 what ld.so needs, and now have a bigger stub to
15608 support automatic multiple TOCs. */
15609 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 8 * 4;
15610 break;
15611
15612 case DT_PPC64_OPD:
15613 s = bfd_get_section_by_name (output_bfd, ".opd");
15614 if (s == NULL)
15615 continue;
15616 dyn.d_un.d_ptr = s->vma;
15617 break;
15618
15619 case DT_PPC64_OPT:
15620 if (htab->do_multi_toc && htab->multi_toc_needed)
15621 dyn.d_un.d_val |= PPC64_OPT_MULTI_TOC;
15622 if (htab->has_plt_localentry0)
15623 dyn.d_un.d_val |= PPC64_OPT_LOCALENTRY;
15624 break;
15625
15626 case DT_PPC64_OPDSZ:
15627 s = bfd_get_section_by_name (output_bfd, ".opd");
15628 if (s == NULL)
15629 continue;
15630 dyn.d_un.d_val = s->size;
15631 break;
15632
15633 case DT_PLTGOT:
15634 s = htab->elf.splt;
15635 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15636 break;
15637
15638 case DT_JMPREL:
15639 s = htab->elf.srelplt;
15640 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15641 break;
15642
15643 case DT_PLTRELSZ:
15644 dyn.d_un.d_val = htab->elf.srelplt->size;
15645 break;
15646
15647 case DT_TEXTREL:
15648 if (htab->local_ifunc_resolver)
15649 info->callbacks->einfo
15650 (_("%X%P: text relocations and GNU indirect "
15651 "functions will result in a segfault at runtime\n"));
15652 else if (htab->maybe_local_ifunc_resolver)
15653 info->callbacks->einfo
15654 (_("%P: warning: text relocations and GNU indirect "
15655 "functions may result in a segfault at runtime\n"));
15656 continue;
15657 }
15658
15659 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
15660 }
15661 }
15662
15663 if (htab->elf.sgot != NULL && htab->elf.sgot->size != 0
15664 && htab->elf.sgot->output_section != bfd_abs_section_ptr)
15665 {
15666 /* Fill in the first entry in the global offset table.
15667 We use it to hold the link-time TOCbase. */
15668 bfd_put_64 (output_bfd,
15669 elf_gp (output_bfd) + TOC_BASE_OFF,
15670 htab->elf.sgot->contents);
15671
15672 /* Set .got entry size. */
15673 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 8;
15674 }
15675
15676 if (htab->elf.splt != NULL && htab->elf.splt->size != 0
15677 && htab->elf.splt->output_section != bfd_abs_section_ptr)
15678 {
15679 /* Set .plt entry size. */
15680 elf_section_data (htab->elf.splt->output_section)->this_hdr.sh_entsize
15681 = PLT_ENTRY_SIZE (htab);
15682 }
15683
15684 /* brlt is SEC_LINKER_CREATED, so we need to write out relocs for
15685 brlt ourselves if emitrelocations. */
15686 if (htab->brlt != NULL
15687 && htab->brlt->reloc_count != 0
15688 && !_bfd_elf_link_output_relocs (output_bfd,
15689 htab->brlt,
15690 elf_section_data (htab->brlt)->rela.hdr,
15691 elf_section_data (htab->brlt)->relocs,
15692 NULL))
15693 return FALSE;
15694
15695 if (htab->glink != NULL
15696 && htab->glink->reloc_count != 0
15697 && !_bfd_elf_link_output_relocs (output_bfd,
15698 htab->glink,
15699 elf_section_data (htab->glink)->rela.hdr,
15700 elf_section_data (htab->glink)->relocs,
15701 NULL))
15702 return FALSE;
15703
15704 if (htab->glink_eh_frame != NULL
15705 && htab->glink_eh_frame->size != 0)
15706 {
15707 bfd_vma val;
15708 bfd_byte *p;
15709 struct map_stub *group;
15710 size_t align = 4;
15711
15712 p = htab->glink_eh_frame->contents;
15713 p += (sizeof (glink_eh_frame_cie) + align - 1) & -align;
15714
15715 for (group = htab->group; group != NULL; group = group->next)
15716 if (group->stub_sec != NULL)
15717 {
15718 /* Offset to stub section. */
15719 val = (group->stub_sec->output_section->vma
15720 + group->stub_sec->output_offset);
15721 val -= (htab->glink_eh_frame->output_section->vma
15722 + htab->glink_eh_frame->output_offset
15723 + (p + 8 - htab->glink_eh_frame->contents));
15724 if (val + 0x80000000 > 0xffffffff)
15725 {
15726 info->callbacks->einfo
15727 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
15728 group->stub_sec->name);
15729 return FALSE;
15730 }
15731 bfd_put_32 (dynobj, val, p + 8);
15732 p += stub_eh_frame_size (group, align);
15733 }
15734 if (htab->glink != NULL && htab->glink->size != 0)
15735 {
15736 /* Offset to .glink. */
15737 val = (htab->glink->output_section->vma
15738 + htab->glink->output_offset
15739 + 8);
15740 val -= (htab->glink_eh_frame->output_section->vma
15741 + htab->glink_eh_frame->output_offset
15742 + (p + 8 - htab->glink_eh_frame->contents));
15743 if (val + 0x80000000 > 0xffffffff)
15744 {
15745 info->callbacks->einfo
15746 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
15747 htab->glink->name);
15748 return FALSE;
15749 }
15750 bfd_put_32 (dynobj, val, p + 8);
15751 p += (24 + align - 1) & -align;
15752 }
15753
15754 if (htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME
15755 && !_bfd_elf_write_section_eh_frame (output_bfd, info,
15756 htab->glink_eh_frame,
15757 htab->glink_eh_frame->contents))
15758 return FALSE;
15759 }
15760
15761 /* We need to handle writing out multiple GOT sections ourselves,
15762 since we didn't add them to DYNOBJ. We know dynobj is the first
15763 bfd. */
15764 while ((dynobj = dynobj->link.next) != NULL)
15765 {
15766 asection *s;
15767
15768 if (!is_ppc64_elf (dynobj))
15769 continue;
15770
15771 s = ppc64_elf_tdata (dynobj)->got;
15772 if (s != NULL
15773 && s->size != 0
15774 && s->output_section != bfd_abs_section_ptr
15775 && !bfd_set_section_contents (output_bfd, s->output_section,
15776 s->contents, s->output_offset,
15777 s->size))
15778 return FALSE;
15779 s = ppc64_elf_tdata (dynobj)->relgot;
15780 if (s != NULL
15781 && s->size != 0
15782 && s->output_section != bfd_abs_section_ptr
15783 && !bfd_set_section_contents (output_bfd, s->output_section,
15784 s->contents, s->output_offset,
15785 s->size))
15786 return FALSE;
15787 }
15788
15789 return TRUE;
15790 }
15791
15792 #include "elf64-target.h"
15793
15794 /* FreeBSD support */
15795
15796 #undef TARGET_LITTLE_SYM
15797 #undef TARGET_LITTLE_NAME
15798
15799 #undef TARGET_BIG_SYM
15800 #define TARGET_BIG_SYM powerpc_elf64_fbsd_vec
15801 #undef TARGET_BIG_NAME
15802 #define TARGET_BIG_NAME "elf64-powerpc-freebsd"
15803
15804 #undef ELF_OSABI
15805 #define ELF_OSABI ELFOSABI_FREEBSD
15806
15807 #undef elf64_bed
15808 #define elf64_bed elf64_powerpc_fbsd_bed
15809
15810 #include "elf64-target.h"
GDB Binutils - Deliverables
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