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R_PPC64_ENTRY
[deliverable/binutils-gdb.git] / bfd / elf64-ppc.c
1 /* PowerPC64-specific support for 64-bit ELF.
2 Copyright (C) 1999-2015 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_can_gc_sections 1
76 #define elf_backend_can_refcount 1
77 #define elf_backend_rela_normal 1
78 #define elf_backend_default_execstack 0
79
80 #define bfd_elf64_mkobject ppc64_elf_mkobject
81 #define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup
82 #define bfd_elf64_bfd_reloc_name_lookup ppc64_elf_reloc_name_lookup
83 #define bfd_elf64_bfd_merge_private_bfd_data ppc64_elf_merge_private_bfd_data
84 #define bfd_elf64_bfd_print_private_bfd_data ppc64_elf_print_private_bfd_data
85 #define bfd_elf64_new_section_hook ppc64_elf_new_section_hook
86 #define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create
87 #define bfd_elf64_get_synthetic_symtab ppc64_elf_get_synthetic_symtab
88 #define bfd_elf64_bfd_link_just_syms ppc64_elf_link_just_syms
89
90 #define elf_backend_object_p ppc64_elf_object_p
91 #define elf_backend_grok_prstatus ppc64_elf_grok_prstatus
92 #define elf_backend_grok_psinfo ppc64_elf_grok_psinfo
93 #define elf_backend_write_core_note ppc64_elf_write_core_note
94 #define elf_backend_create_dynamic_sections ppc64_elf_create_dynamic_sections
95 #define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol
96 #define elf_backend_add_symbol_hook ppc64_elf_add_symbol_hook
97 #define elf_backend_check_directives ppc64_elf_before_check_relocs
98 #define elf_backend_notice_as_needed ppc64_elf_notice_as_needed
99 #define elf_backend_archive_symbol_lookup ppc64_elf_archive_symbol_lookup
100 #define elf_backend_check_relocs ppc64_elf_check_relocs
101 #define elf_backend_gc_keep ppc64_elf_gc_keep
102 #define elf_backend_gc_mark_dynamic_ref ppc64_elf_gc_mark_dynamic_ref
103 #define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook
104 #define elf_backend_gc_sweep_hook ppc64_elf_gc_sweep_hook
105 #define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol
106 #define elf_backend_hide_symbol ppc64_elf_hide_symbol
107 #define elf_backend_maybe_function_sym ppc64_elf_maybe_function_sym
108 #define elf_backend_always_size_sections ppc64_elf_func_desc_adjust
109 #define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections
110 #define elf_backend_hash_symbol ppc64_elf_hash_symbol
111 #define elf_backend_init_index_section _bfd_elf_init_2_index_sections
112 #define elf_backend_action_discarded ppc64_elf_action_discarded
113 #define elf_backend_relocate_section ppc64_elf_relocate_section
114 #define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol
115 #define elf_backend_reloc_type_class ppc64_elf_reloc_type_class
116 #define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections
117 #define elf_backend_link_output_symbol_hook ppc64_elf_output_symbol_hook
118 #define elf_backend_special_sections ppc64_elf_special_sections
119 #define elf_backend_merge_symbol_attribute ppc64_elf_merge_symbol_attribute
120
121 /* The name of the dynamic interpreter. This is put in the .interp
122 section. */
123 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
124
125 /* The size in bytes of an entry in the procedure linkage table. */
126 #define PLT_ENTRY_SIZE(htab) (htab->opd_abi ? 24 : 8)
127
128 /* The initial size of the plt reserved for the dynamic linker. */
129 #define PLT_INITIAL_ENTRY_SIZE(htab) (htab->opd_abi ? 24 : 16)
130
131 /* Offsets to some stack save slots. */
132 #define STK_LR 16
133 #define STK_TOC(htab) (htab->opd_abi ? 40 : 24)
134 /* This one is dodgy. ELFv2 does not have a linker word, so use the
135 CR save slot. Used only by optimised __tls_get_addr call stub,
136 relying on __tls_get_addr_opt not saving CR.. */
137 #define STK_LINKER(htab) (htab->opd_abi ? 32 : 8)
138
139 /* TOC base pointers offset from start of TOC. */
140 #define TOC_BASE_OFF 0x8000
141 /* TOC base alignment. */
142 #define TOC_BASE_ALIGN 256
143
144 /* Offset of tp and dtp pointers from start of TLS block. */
145 #define TP_OFFSET 0x7000
146 #define DTP_OFFSET 0x8000
147
148 /* .plt call stub instructions. The normal stub is like this, but
149 sometimes the .plt entry crosses a 64k boundary and we need to
150 insert an addi to adjust r11. */
151 #define STD_R2_0R1 0xf8410000 /* std %r2,0+40(%r1) */
152 #define ADDIS_R11_R2 0x3d620000 /* addis %r11,%r2,xxx@ha */
153 #define LD_R12_0R11 0xe98b0000 /* ld %r12,xxx+0@l(%r11) */
154 #define MTCTR_R12 0x7d8903a6 /* mtctr %r12 */
155 #define LD_R2_0R11 0xe84b0000 /* ld %r2,xxx+8@l(%r11) */
156 #define LD_R11_0R11 0xe96b0000 /* ld %r11,xxx+16@l(%r11) */
157 #define BCTR 0x4e800420 /* bctr */
158
159 #define ADDI_R11_R11 0x396b0000 /* addi %r11,%r11,off@l */
160 #define ADDIS_R2_R2 0x3c420000 /* addis %r2,%r2,off@ha */
161 #define ADDI_R2_R2 0x38420000 /* addi %r2,%r2,off@l */
162
163 #define XOR_R2_R12_R12 0x7d826278 /* xor %r2,%r12,%r12 */
164 #define ADD_R11_R11_R2 0x7d6b1214 /* add %r11,%r11,%r2 */
165 #define XOR_R11_R12_R12 0x7d8b6278 /* xor %r11,%r12,%r12 */
166 #define ADD_R2_R2_R11 0x7c425a14 /* add %r2,%r2,%r11 */
167 #define CMPLDI_R2_0 0x28220000 /* cmpldi %r2,0 */
168 #define BNECTR 0x4ca20420 /* bnectr+ */
169 #define BNECTR_P4 0x4ce20420 /* bnectr+ */
170
171 #define LD_R12_0R2 0xe9820000 /* ld %r12,xxx+0(%r2) */
172 #define LD_R11_0R2 0xe9620000 /* ld %r11,xxx+0(%r2) */
173 #define LD_R2_0R2 0xe8420000 /* ld %r2,xxx+0(%r2) */
174
175 #define LD_R2_0R1 0xe8410000 /* ld %r2,0(%r1) */
176 #define LD_R2_0R12 0xe84c0000 /* ld %r2,0(%r12) */
177 #define ADD_R2_R2_R12 0x7c426214 /* add %r2,%r2,%r12 */
178
179 #define LIS_R2 0x3c400000 /* lis %r2,xxx@ha */
180 #define ADDIS_R2_R12 0x3c4c0000 /* addis %r2,%r12,xxx@ha */
181 #define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */
182 #define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,xxx@ha */
183 #define LD_R12_0R12 0xe98c0000 /* ld %r12,xxx@l(%r12) */
184
185 /* glink call stub instructions. We enter with the index in R0. */
186 #define GLINK_CALL_STUB_SIZE (16*4)
187 /* 0: */
188 /* .quad plt0-1f */
189 /* __glink: */
190 #define MFLR_R12 0x7d8802a6 /* mflr %12 */
191 #define BCL_20_31 0x429f0005 /* bcl 20,31,1f */
192 /* 1: */
193 #define MFLR_R11 0x7d6802a6 /* mflr %11 */
194 /* ld %2,(0b-1b)(%11) */
195 #define MTLR_R12 0x7d8803a6 /* mtlr %12 */
196 #define ADD_R11_R2_R11 0x7d625a14 /* add %11,%2,%11 */
197 /* ld %12,0(%11) */
198 /* ld %2,8(%11) */
199 /* mtctr %12 */
200 /* ld %11,16(%11) */
201 /* bctr */
202 #define MFLR_R0 0x7c0802a6 /* mflr %r0 */
203 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
204 #define SUB_R12_R12_R11 0x7d8b6050 /* subf %r12,%r11,%r12 */
205 #define ADDI_R0_R12 0x380c0000 /* addi %r0,%r12,0 */
206 #define SRDI_R0_R0_2 0x7800f082 /* rldicl %r0,%r0,62,2 */
207
208 /* Pad with this. */
209 #define NOP 0x60000000
210
211 /* Some other nops. */
212 #define CROR_151515 0x4def7b82
213 #define CROR_313131 0x4ffffb82
214
215 /* .glink entries for the first 32k functions are two instructions. */
216 #define LI_R0_0 0x38000000 /* li %r0,0 */
217 #define B_DOT 0x48000000 /* b . */
218
219 /* After that, we need two instructions to load the index, followed by
220 a branch. */
221 #define LIS_R0_0 0x3c000000 /* lis %r0,0 */
222 #define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
223
224 /* Instructions used by the save and restore reg functions. */
225 #define STD_R0_0R1 0xf8010000 /* std %r0,0(%r1) */
226 #define STD_R0_0R12 0xf80c0000 /* std %r0,0(%r12) */
227 #define LD_R0_0R1 0xe8010000 /* ld %r0,0(%r1) */
228 #define LD_R0_0R12 0xe80c0000 /* ld %r0,0(%r12) */
229 #define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
230 #define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
231 #define LI_R12_0 0x39800000 /* li %r12,0 */
232 #define STVX_VR0_R12_R0 0x7c0c01ce /* stvx %v0,%r12,%r0 */
233 #define LVX_VR0_R12_R0 0x7c0c00ce /* lvx %v0,%r12,%r0 */
234 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
235 #define BLR 0x4e800020 /* blr */
236
237 /* Since .opd is an array of descriptors and each entry will end up
238 with identical R_PPC64_RELATIVE relocs, there is really no need to
239 propagate .opd relocs; The dynamic linker should be taught to
240 relocate .opd without reloc entries. */
241 #ifndef NO_OPD_RELOCS
242 #define NO_OPD_RELOCS 0
243 #endif
244
245 #ifndef ARRAY_SIZE
246 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
247 #endif
248
249 static inline int
250 abiversion (bfd *abfd)
251 {
252 return elf_elfheader (abfd)->e_flags & EF_PPC64_ABI;
253 }
254
255 static inline void
256 set_abiversion (bfd *abfd, int ver)
257 {
258 elf_elfheader (abfd)->e_flags &= ~EF_PPC64_ABI;
259 elf_elfheader (abfd)->e_flags |= ver & EF_PPC64_ABI;
260 }
261 \f
262 #define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1)
263
264 /* Relocation HOWTO's. */
265 static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max];
266
267 static reloc_howto_type ppc64_elf_howto_raw[] = {
268 /* This reloc does nothing. */
269 HOWTO (R_PPC64_NONE, /* type */
270 0, /* rightshift */
271 3, /* size (0 = byte, 1 = short, 2 = long) */
272 0, /* bitsize */
273 FALSE, /* pc_relative */
274 0, /* bitpos */
275 complain_overflow_dont, /* complain_on_overflow */
276 bfd_elf_generic_reloc, /* special_function */
277 "R_PPC64_NONE", /* name */
278 FALSE, /* partial_inplace */
279 0, /* src_mask */
280 0, /* dst_mask */
281 FALSE), /* pcrel_offset */
282
283 /* A standard 32 bit relocation. */
284 HOWTO (R_PPC64_ADDR32, /* type */
285 0, /* rightshift */
286 2, /* size (0 = byte, 1 = short, 2 = long) */
287 32, /* bitsize */
288 FALSE, /* pc_relative */
289 0, /* bitpos */
290 complain_overflow_bitfield, /* complain_on_overflow */
291 bfd_elf_generic_reloc, /* special_function */
292 "R_PPC64_ADDR32", /* name */
293 FALSE, /* partial_inplace */
294 0, /* src_mask */
295 0xffffffff, /* dst_mask */
296 FALSE), /* pcrel_offset */
297
298 /* An absolute 26 bit branch; the lower two bits must be zero.
299 FIXME: we don't check that, we just clear them. */
300 HOWTO (R_PPC64_ADDR24, /* type */
301 0, /* rightshift */
302 2, /* size (0 = byte, 1 = short, 2 = long) */
303 26, /* bitsize */
304 FALSE, /* pc_relative */
305 0, /* bitpos */
306 complain_overflow_bitfield, /* complain_on_overflow */
307 bfd_elf_generic_reloc, /* special_function */
308 "R_PPC64_ADDR24", /* name */
309 FALSE, /* partial_inplace */
310 0, /* src_mask */
311 0x03fffffc, /* dst_mask */
312 FALSE), /* pcrel_offset */
313
314 /* A standard 16 bit relocation. */
315 HOWTO (R_PPC64_ADDR16, /* type */
316 0, /* rightshift */
317 1, /* size (0 = byte, 1 = short, 2 = long) */
318 16, /* bitsize */
319 FALSE, /* pc_relative */
320 0, /* bitpos */
321 complain_overflow_bitfield, /* complain_on_overflow */
322 bfd_elf_generic_reloc, /* special_function */
323 "R_PPC64_ADDR16", /* name */
324 FALSE, /* partial_inplace */
325 0, /* src_mask */
326 0xffff, /* dst_mask */
327 FALSE), /* pcrel_offset */
328
329 /* A 16 bit relocation without overflow. */
330 HOWTO (R_PPC64_ADDR16_LO, /* type */
331 0, /* rightshift */
332 1, /* size (0 = byte, 1 = short, 2 = long) */
333 16, /* bitsize */
334 FALSE, /* pc_relative */
335 0, /* bitpos */
336 complain_overflow_dont,/* complain_on_overflow */
337 bfd_elf_generic_reloc, /* special_function */
338 "R_PPC64_ADDR16_LO", /* name */
339 FALSE, /* partial_inplace */
340 0, /* src_mask */
341 0xffff, /* dst_mask */
342 FALSE), /* pcrel_offset */
343
344 /* Bits 16-31 of an address. */
345 HOWTO (R_PPC64_ADDR16_HI, /* type */
346 16, /* rightshift */
347 1, /* size (0 = byte, 1 = short, 2 = long) */
348 16, /* bitsize */
349 FALSE, /* pc_relative */
350 0, /* bitpos */
351 complain_overflow_signed, /* complain_on_overflow */
352 bfd_elf_generic_reloc, /* special_function */
353 "R_PPC64_ADDR16_HI", /* name */
354 FALSE, /* partial_inplace */
355 0, /* src_mask */
356 0xffff, /* dst_mask */
357 FALSE), /* pcrel_offset */
358
359 /* Bits 16-31 of an address, plus 1 if the contents of the low 16
360 bits, treated as a signed number, is negative. */
361 HOWTO (R_PPC64_ADDR16_HA, /* type */
362 16, /* rightshift */
363 1, /* size (0 = byte, 1 = short, 2 = long) */
364 16, /* bitsize */
365 FALSE, /* pc_relative */
366 0, /* bitpos */
367 complain_overflow_signed, /* complain_on_overflow */
368 ppc64_elf_ha_reloc, /* special_function */
369 "R_PPC64_ADDR16_HA", /* name */
370 FALSE, /* partial_inplace */
371 0, /* src_mask */
372 0xffff, /* dst_mask */
373 FALSE), /* pcrel_offset */
374
375 /* An absolute 16 bit branch; the lower two bits must be zero.
376 FIXME: we don't check that, we just clear them. */
377 HOWTO (R_PPC64_ADDR14, /* type */
378 0, /* rightshift */
379 2, /* size (0 = byte, 1 = short, 2 = long) */
380 16, /* bitsize */
381 FALSE, /* pc_relative */
382 0, /* bitpos */
383 complain_overflow_signed, /* complain_on_overflow */
384 ppc64_elf_branch_reloc, /* special_function */
385 "R_PPC64_ADDR14", /* name */
386 FALSE, /* partial_inplace */
387 0, /* src_mask */
388 0x0000fffc, /* dst_mask */
389 FALSE), /* pcrel_offset */
390
391 /* An absolute 16 bit branch, for which bit 10 should be set to
392 indicate that the branch is expected to be taken. The lower two
393 bits must be zero. */
394 HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */
395 0, /* rightshift */
396 2, /* size (0 = byte, 1 = short, 2 = long) */
397 16, /* bitsize */
398 FALSE, /* pc_relative */
399 0, /* bitpos */
400 complain_overflow_signed, /* complain_on_overflow */
401 ppc64_elf_brtaken_reloc, /* special_function */
402 "R_PPC64_ADDR14_BRTAKEN",/* name */
403 FALSE, /* partial_inplace */
404 0, /* src_mask */
405 0x0000fffc, /* dst_mask */
406 FALSE), /* pcrel_offset */
407
408 /* An absolute 16 bit branch, for which bit 10 should be set to
409 indicate that the branch is not expected to be taken. The lower
410 two bits must be zero. */
411 HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */
412 0, /* rightshift */
413 2, /* size (0 = byte, 1 = short, 2 = long) */
414 16, /* bitsize */
415 FALSE, /* pc_relative */
416 0, /* bitpos */
417 complain_overflow_signed, /* complain_on_overflow */
418 ppc64_elf_brtaken_reloc, /* special_function */
419 "R_PPC64_ADDR14_BRNTAKEN",/* name */
420 FALSE, /* partial_inplace */
421 0, /* src_mask */
422 0x0000fffc, /* dst_mask */
423 FALSE), /* pcrel_offset */
424
425 /* A relative 26 bit branch; the lower two bits must be zero. */
426 HOWTO (R_PPC64_REL24, /* type */
427 0, /* rightshift */
428 2, /* size (0 = byte, 1 = short, 2 = long) */
429 26, /* bitsize */
430 TRUE, /* pc_relative */
431 0, /* bitpos */
432 complain_overflow_signed, /* complain_on_overflow */
433 ppc64_elf_branch_reloc, /* special_function */
434 "R_PPC64_REL24", /* name */
435 FALSE, /* partial_inplace */
436 0, /* src_mask */
437 0x03fffffc, /* dst_mask */
438 TRUE), /* pcrel_offset */
439
440 /* A relative 16 bit branch; the lower two bits must be zero. */
441 HOWTO (R_PPC64_REL14, /* type */
442 0, /* rightshift */
443 2, /* size (0 = byte, 1 = short, 2 = long) */
444 16, /* bitsize */
445 TRUE, /* pc_relative */
446 0, /* bitpos */
447 complain_overflow_signed, /* complain_on_overflow */
448 ppc64_elf_branch_reloc, /* special_function */
449 "R_PPC64_REL14", /* name */
450 FALSE, /* partial_inplace */
451 0, /* src_mask */
452 0x0000fffc, /* dst_mask */
453 TRUE), /* pcrel_offset */
454
455 /* A relative 16 bit branch. Bit 10 should be set to indicate that
456 the branch is expected to be taken. The lower two bits must be
457 zero. */
458 HOWTO (R_PPC64_REL14_BRTAKEN, /* type */
459 0, /* rightshift */
460 2, /* size (0 = byte, 1 = short, 2 = long) */
461 16, /* bitsize */
462 TRUE, /* pc_relative */
463 0, /* bitpos */
464 complain_overflow_signed, /* complain_on_overflow */
465 ppc64_elf_brtaken_reloc, /* special_function */
466 "R_PPC64_REL14_BRTAKEN", /* name */
467 FALSE, /* partial_inplace */
468 0, /* src_mask */
469 0x0000fffc, /* dst_mask */
470 TRUE), /* pcrel_offset */
471
472 /* A relative 16 bit branch. Bit 10 should be set to indicate that
473 the branch is not expected to be taken. The lower two bits must
474 be zero. */
475 HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */
476 0, /* rightshift */
477 2, /* size (0 = byte, 1 = short, 2 = long) */
478 16, /* bitsize */
479 TRUE, /* pc_relative */
480 0, /* bitpos */
481 complain_overflow_signed, /* complain_on_overflow */
482 ppc64_elf_brtaken_reloc, /* special_function */
483 "R_PPC64_REL14_BRNTAKEN",/* name */
484 FALSE, /* partial_inplace */
485 0, /* src_mask */
486 0x0000fffc, /* dst_mask */
487 TRUE), /* pcrel_offset */
488
489 /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
490 symbol. */
491 HOWTO (R_PPC64_GOT16, /* type */
492 0, /* rightshift */
493 1, /* size (0 = byte, 1 = short, 2 = long) */
494 16, /* bitsize */
495 FALSE, /* pc_relative */
496 0, /* bitpos */
497 complain_overflow_signed, /* complain_on_overflow */
498 ppc64_elf_unhandled_reloc, /* special_function */
499 "R_PPC64_GOT16", /* name */
500 FALSE, /* partial_inplace */
501 0, /* src_mask */
502 0xffff, /* dst_mask */
503 FALSE), /* pcrel_offset */
504
505 /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
506 the symbol. */
507 HOWTO (R_PPC64_GOT16_LO, /* type */
508 0, /* rightshift */
509 1, /* size (0 = byte, 1 = short, 2 = long) */
510 16, /* bitsize */
511 FALSE, /* pc_relative */
512 0, /* bitpos */
513 complain_overflow_dont, /* complain_on_overflow */
514 ppc64_elf_unhandled_reloc, /* special_function */
515 "R_PPC64_GOT16_LO", /* name */
516 FALSE, /* partial_inplace */
517 0, /* src_mask */
518 0xffff, /* dst_mask */
519 FALSE), /* pcrel_offset */
520
521 /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
522 the symbol. */
523 HOWTO (R_PPC64_GOT16_HI, /* type */
524 16, /* rightshift */
525 1, /* size (0 = byte, 1 = short, 2 = long) */
526 16, /* bitsize */
527 FALSE, /* pc_relative */
528 0, /* bitpos */
529 complain_overflow_signed,/* complain_on_overflow */
530 ppc64_elf_unhandled_reloc, /* special_function */
531 "R_PPC64_GOT16_HI", /* name */
532 FALSE, /* partial_inplace */
533 0, /* src_mask */
534 0xffff, /* dst_mask */
535 FALSE), /* pcrel_offset */
536
537 /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
538 the symbol. */
539 HOWTO (R_PPC64_GOT16_HA, /* type */
540 16, /* rightshift */
541 1, /* size (0 = byte, 1 = short, 2 = long) */
542 16, /* bitsize */
543 FALSE, /* pc_relative */
544 0, /* bitpos */
545 complain_overflow_signed,/* complain_on_overflow */
546 ppc64_elf_unhandled_reloc, /* special_function */
547 "R_PPC64_GOT16_HA", /* name */
548 FALSE, /* partial_inplace */
549 0, /* src_mask */
550 0xffff, /* dst_mask */
551 FALSE), /* pcrel_offset */
552
553 /* This is used only by the dynamic linker. The symbol should exist
554 both in the object being run and in some shared library. The
555 dynamic linker copies the data addressed by the symbol from the
556 shared library into the object, because the object being
557 run has to have the data at some particular address. */
558 HOWTO (R_PPC64_COPY, /* type */
559 0, /* rightshift */
560 0, /* this one is variable size */
561 0, /* bitsize */
562 FALSE, /* pc_relative */
563 0, /* bitpos */
564 complain_overflow_dont, /* complain_on_overflow */
565 ppc64_elf_unhandled_reloc, /* special_function */
566 "R_PPC64_COPY", /* name */
567 FALSE, /* partial_inplace */
568 0, /* src_mask */
569 0, /* dst_mask */
570 FALSE), /* pcrel_offset */
571
572 /* Like R_PPC64_ADDR64, but used when setting global offset table
573 entries. */
574 HOWTO (R_PPC64_GLOB_DAT, /* type */
575 0, /* rightshift */
576 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
577 64, /* bitsize */
578 FALSE, /* pc_relative */
579 0, /* bitpos */
580 complain_overflow_dont, /* complain_on_overflow */
581 ppc64_elf_unhandled_reloc, /* special_function */
582 "R_PPC64_GLOB_DAT", /* name */
583 FALSE, /* partial_inplace */
584 0, /* src_mask */
585 ONES (64), /* dst_mask */
586 FALSE), /* pcrel_offset */
587
588 /* Created by the link editor. Marks a procedure linkage table
589 entry for a symbol. */
590 HOWTO (R_PPC64_JMP_SLOT, /* type */
591 0, /* rightshift */
592 0, /* size (0 = byte, 1 = short, 2 = long) */
593 0, /* bitsize */
594 FALSE, /* pc_relative */
595 0, /* bitpos */
596 complain_overflow_dont, /* complain_on_overflow */
597 ppc64_elf_unhandled_reloc, /* special_function */
598 "R_PPC64_JMP_SLOT", /* name */
599 FALSE, /* partial_inplace */
600 0, /* src_mask */
601 0, /* dst_mask */
602 FALSE), /* pcrel_offset */
603
604 /* Used only by the dynamic linker. When the object is run, this
605 doubleword64 is set to the load address of the object, plus the
606 addend. */
607 HOWTO (R_PPC64_RELATIVE, /* type */
608 0, /* rightshift */
609 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
610 64, /* bitsize */
611 FALSE, /* pc_relative */
612 0, /* bitpos */
613 complain_overflow_dont, /* complain_on_overflow */
614 bfd_elf_generic_reloc, /* special_function */
615 "R_PPC64_RELATIVE", /* name */
616 FALSE, /* partial_inplace */
617 0, /* src_mask */
618 ONES (64), /* dst_mask */
619 FALSE), /* pcrel_offset */
620
621 /* Like R_PPC64_ADDR32, but may be unaligned. */
622 HOWTO (R_PPC64_UADDR32, /* type */
623 0, /* rightshift */
624 2, /* size (0 = byte, 1 = short, 2 = long) */
625 32, /* bitsize */
626 FALSE, /* pc_relative */
627 0, /* bitpos */
628 complain_overflow_bitfield, /* complain_on_overflow */
629 bfd_elf_generic_reloc, /* special_function */
630 "R_PPC64_UADDR32", /* name */
631 FALSE, /* partial_inplace */
632 0, /* src_mask */
633 0xffffffff, /* dst_mask */
634 FALSE), /* pcrel_offset */
635
636 /* Like R_PPC64_ADDR16, but may be unaligned. */
637 HOWTO (R_PPC64_UADDR16, /* type */
638 0, /* rightshift */
639 1, /* size (0 = byte, 1 = short, 2 = long) */
640 16, /* bitsize */
641 FALSE, /* pc_relative */
642 0, /* bitpos */
643 complain_overflow_bitfield, /* complain_on_overflow */
644 bfd_elf_generic_reloc, /* special_function */
645 "R_PPC64_UADDR16", /* name */
646 FALSE, /* partial_inplace */
647 0, /* src_mask */
648 0xffff, /* dst_mask */
649 FALSE), /* pcrel_offset */
650
651 /* 32-bit PC relative. */
652 HOWTO (R_PPC64_REL32, /* type */
653 0, /* rightshift */
654 2, /* size (0 = byte, 1 = short, 2 = long) */
655 32, /* bitsize */
656 TRUE, /* pc_relative */
657 0, /* bitpos */
658 complain_overflow_signed, /* complain_on_overflow */
659 bfd_elf_generic_reloc, /* special_function */
660 "R_PPC64_REL32", /* name */
661 FALSE, /* partial_inplace */
662 0, /* src_mask */
663 0xffffffff, /* dst_mask */
664 TRUE), /* pcrel_offset */
665
666 /* 32-bit relocation to the symbol's procedure linkage table. */
667 HOWTO (R_PPC64_PLT32, /* type */
668 0, /* rightshift */
669 2, /* size (0 = byte, 1 = short, 2 = long) */
670 32, /* bitsize */
671 FALSE, /* pc_relative */
672 0, /* bitpos */
673 complain_overflow_bitfield, /* complain_on_overflow */
674 ppc64_elf_unhandled_reloc, /* special_function */
675 "R_PPC64_PLT32", /* name */
676 FALSE, /* partial_inplace */
677 0, /* src_mask */
678 0xffffffff, /* dst_mask */
679 FALSE), /* pcrel_offset */
680
681 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
682 FIXME: R_PPC64_PLTREL32 not supported. */
683 HOWTO (R_PPC64_PLTREL32, /* type */
684 0, /* rightshift */
685 2, /* size (0 = byte, 1 = short, 2 = long) */
686 32, /* bitsize */
687 TRUE, /* pc_relative */
688 0, /* bitpos */
689 complain_overflow_signed, /* complain_on_overflow */
690 bfd_elf_generic_reloc, /* special_function */
691 "R_PPC64_PLTREL32", /* name */
692 FALSE, /* partial_inplace */
693 0, /* src_mask */
694 0xffffffff, /* dst_mask */
695 TRUE), /* pcrel_offset */
696
697 /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
698 the symbol. */
699 HOWTO (R_PPC64_PLT16_LO, /* type */
700 0, /* rightshift */
701 1, /* size (0 = byte, 1 = short, 2 = long) */
702 16, /* bitsize */
703 FALSE, /* pc_relative */
704 0, /* bitpos */
705 complain_overflow_dont, /* complain_on_overflow */
706 ppc64_elf_unhandled_reloc, /* special_function */
707 "R_PPC64_PLT16_LO", /* name */
708 FALSE, /* partial_inplace */
709 0, /* src_mask */
710 0xffff, /* dst_mask */
711 FALSE), /* pcrel_offset */
712
713 /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
714 the symbol. */
715 HOWTO (R_PPC64_PLT16_HI, /* type */
716 16, /* rightshift */
717 1, /* size (0 = byte, 1 = short, 2 = long) */
718 16, /* bitsize */
719 FALSE, /* pc_relative */
720 0, /* bitpos */
721 complain_overflow_signed, /* complain_on_overflow */
722 ppc64_elf_unhandled_reloc, /* special_function */
723 "R_PPC64_PLT16_HI", /* name */
724 FALSE, /* partial_inplace */
725 0, /* src_mask */
726 0xffff, /* dst_mask */
727 FALSE), /* pcrel_offset */
728
729 /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
730 the symbol. */
731 HOWTO (R_PPC64_PLT16_HA, /* type */
732 16, /* rightshift */
733 1, /* size (0 = byte, 1 = short, 2 = long) */
734 16, /* bitsize */
735 FALSE, /* pc_relative */
736 0, /* bitpos */
737 complain_overflow_signed, /* complain_on_overflow */
738 ppc64_elf_unhandled_reloc, /* special_function */
739 "R_PPC64_PLT16_HA", /* name */
740 FALSE, /* partial_inplace */
741 0, /* src_mask */
742 0xffff, /* dst_mask */
743 FALSE), /* pcrel_offset */
744
745 /* 16-bit section relative relocation. */
746 HOWTO (R_PPC64_SECTOFF, /* type */
747 0, /* rightshift */
748 1, /* size (0 = byte, 1 = short, 2 = long) */
749 16, /* bitsize */
750 FALSE, /* pc_relative */
751 0, /* bitpos */
752 complain_overflow_signed, /* complain_on_overflow */
753 ppc64_elf_sectoff_reloc, /* special_function */
754 "R_PPC64_SECTOFF", /* name */
755 FALSE, /* partial_inplace */
756 0, /* src_mask */
757 0xffff, /* dst_mask */
758 FALSE), /* pcrel_offset */
759
760 /* Like R_PPC64_SECTOFF, but no overflow warning. */
761 HOWTO (R_PPC64_SECTOFF_LO, /* type */
762 0, /* rightshift */
763 1, /* size (0 = byte, 1 = short, 2 = long) */
764 16, /* bitsize */
765 FALSE, /* pc_relative */
766 0, /* bitpos */
767 complain_overflow_dont, /* complain_on_overflow */
768 ppc64_elf_sectoff_reloc, /* special_function */
769 "R_PPC64_SECTOFF_LO", /* name */
770 FALSE, /* partial_inplace */
771 0, /* src_mask */
772 0xffff, /* dst_mask */
773 FALSE), /* pcrel_offset */
774
775 /* 16-bit upper half section relative relocation. */
776 HOWTO (R_PPC64_SECTOFF_HI, /* type */
777 16, /* rightshift */
778 1, /* size (0 = byte, 1 = short, 2 = long) */
779 16, /* bitsize */
780 FALSE, /* pc_relative */
781 0, /* bitpos */
782 complain_overflow_signed, /* complain_on_overflow */
783 ppc64_elf_sectoff_reloc, /* special_function */
784 "R_PPC64_SECTOFF_HI", /* name */
785 FALSE, /* partial_inplace */
786 0, /* src_mask */
787 0xffff, /* dst_mask */
788 FALSE), /* pcrel_offset */
789
790 /* 16-bit upper half adjusted section relative relocation. */
791 HOWTO (R_PPC64_SECTOFF_HA, /* type */
792 16, /* rightshift */
793 1, /* size (0 = byte, 1 = short, 2 = long) */
794 16, /* bitsize */
795 FALSE, /* pc_relative */
796 0, /* bitpos */
797 complain_overflow_signed, /* complain_on_overflow */
798 ppc64_elf_sectoff_ha_reloc, /* special_function */
799 "R_PPC64_SECTOFF_HA", /* name */
800 FALSE, /* partial_inplace */
801 0, /* src_mask */
802 0xffff, /* dst_mask */
803 FALSE), /* pcrel_offset */
804
805 /* Like R_PPC64_REL24 without touching the two least significant bits. */
806 HOWTO (R_PPC64_REL30, /* type */
807 2, /* rightshift */
808 2, /* size (0 = byte, 1 = short, 2 = long) */
809 30, /* bitsize */
810 TRUE, /* pc_relative */
811 0, /* bitpos */
812 complain_overflow_dont, /* complain_on_overflow */
813 bfd_elf_generic_reloc, /* special_function */
814 "R_PPC64_REL30", /* name */
815 FALSE, /* partial_inplace */
816 0, /* src_mask */
817 0xfffffffc, /* dst_mask */
818 TRUE), /* pcrel_offset */
819
820 /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
821
822 /* A standard 64-bit relocation. */
823 HOWTO (R_PPC64_ADDR64, /* type */
824 0, /* rightshift */
825 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
826 64, /* bitsize */
827 FALSE, /* pc_relative */
828 0, /* bitpos */
829 complain_overflow_dont, /* complain_on_overflow */
830 bfd_elf_generic_reloc, /* special_function */
831 "R_PPC64_ADDR64", /* name */
832 FALSE, /* partial_inplace */
833 0, /* src_mask */
834 ONES (64), /* dst_mask */
835 FALSE), /* pcrel_offset */
836
837 /* The bits 32-47 of an address. */
838 HOWTO (R_PPC64_ADDR16_HIGHER, /* type */
839 32, /* rightshift */
840 1, /* size (0 = byte, 1 = short, 2 = long) */
841 16, /* bitsize */
842 FALSE, /* pc_relative */
843 0, /* bitpos */
844 complain_overflow_dont, /* complain_on_overflow */
845 bfd_elf_generic_reloc, /* special_function */
846 "R_PPC64_ADDR16_HIGHER", /* name */
847 FALSE, /* partial_inplace */
848 0, /* src_mask */
849 0xffff, /* dst_mask */
850 FALSE), /* pcrel_offset */
851
852 /* The bits 32-47 of an address, plus 1 if the contents of the low
853 16 bits, treated as a signed number, is negative. */
854 HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */
855 32, /* rightshift */
856 1, /* size (0 = byte, 1 = short, 2 = long) */
857 16, /* bitsize */
858 FALSE, /* pc_relative */
859 0, /* bitpos */
860 complain_overflow_dont, /* complain_on_overflow */
861 ppc64_elf_ha_reloc, /* special_function */
862 "R_PPC64_ADDR16_HIGHERA", /* name */
863 FALSE, /* partial_inplace */
864 0, /* src_mask */
865 0xffff, /* dst_mask */
866 FALSE), /* pcrel_offset */
867
868 /* The bits 48-63 of an address. */
869 HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */
870 48, /* rightshift */
871 1, /* size (0 = byte, 1 = short, 2 = long) */
872 16, /* bitsize */
873 FALSE, /* pc_relative */
874 0, /* bitpos */
875 complain_overflow_dont, /* complain_on_overflow */
876 bfd_elf_generic_reloc, /* special_function */
877 "R_PPC64_ADDR16_HIGHEST", /* name */
878 FALSE, /* partial_inplace */
879 0, /* src_mask */
880 0xffff, /* dst_mask */
881 FALSE), /* pcrel_offset */
882
883 /* The bits 48-63 of an address, plus 1 if the contents of the low
884 16 bits, treated as a signed number, is negative. */
885 HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */
886 48, /* rightshift */
887 1, /* size (0 = byte, 1 = short, 2 = long) */
888 16, /* bitsize */
889 FALSE, /* pc_relative */
890 0, /* bitpos */
891 complain_overflow_dont, /* complain_on_overflow */
892 ppc64_elf_ha_reloc, /* special_function */
893 "R_PPC64_ADDR16_HIGHESTA", /* name */
894 FALSE, /* partial_inplace */
895 0, /* src_mask */
896 0xffff, /* dst_mask */
897 FALSE), /* pcrel_offset */
898
899 /* Like ADDR64, but may be unaligned. */
900 HOWTO (R_PPC64_UADDR64, /* type */
901 0, /* rightshift */
902 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
903 64, /* bitsize */
904 FALSE, /* pc_relative */
905 0, /* bitpos */
906 complain_overflow_dont, /* complain_on_overflow */
907 bfd_elf_generic_reloc, /* special_function */
908 "R_PPC64_UADDR64", /* name */
909 FALSE, /* partial_inplace */
910 0, /* src_mask */
911 ONES (64), /* dst_mask */
912 FALSE), /* pcrel_offset */
913
914 /* 64-bit relative relocation. */
915 HOWTO (R_PPC64_REL64, /* type */
916 0, /* rightshift */
917 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
918 64, /* bitsize */
919 TRUE, /* pc_relative */
920 0, /* bitpos */
921 complain_overflow_dont, /* complain_on_overflow */
922 bfd_elf_generic_reloc, /* special_function */
923 "R_PPC64_REL64", /* name */
924 FALSE, /* partial_inplace */
925 0, /* src_mask */
926 ONES (64), /* dst_mask */
927 TRUE), /* pcrel_offset */
928
929 /* 64-bit relocation to the symbol's procedure linkage table. */
930 HOWTO (R_PPC64_PLT64, /* type */
931 0, /* rightshift */
932 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
933 64, /* bitsize */
934 FALSE, /* pc_relative */
935 0, /* bitpos */
936 complain_overflow_dont, /* complain_on_overflow */
937 ppc64_elf_unhandled_reloc, /* special_function */
938 "R_PPC64_PLT64", /* name */
939 FALSE, /* partial_inplace */
940 0, /* src_mask */
941 ONES (64), /* dst_mask */
942 FALSE), /* pcrel_offset */
943
944 /* 64-bit PC relative relocation to the symbol's procedure linkage
945 table. */
946 /* FIXME: R_PPC64_PLTREL64 not supported. */
947 HOWTO (R_PPC64_PLTREL64, /* type */
948 0, /* rightshift */
949 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
950 64, /* bitsize */
951 TRUE, /* pc_relative */
952 0, /* bitpos */
953 complain_overflow_dont, /* complain_on_overflow */
954 ppc64_elf_unhandled_reloc, /* special_function */
955 "R_PPC64_PLTREL64", /* name */
956 FALSE, /* partial_inplace */
957 0, /* src_mask */
958 ONES (64), /* dst_mask */
959 TRUE), /* pcrel_offset */
960
961 /* 16 bit TOC-relative relocation. */
962
963 /* R_PPC64_TOC16 47 half16* S + A - .TOC. */
964 HOWTO (R_PPC64_TOC16, /* type */
965 0, /* rightshift */
966 1, /* size (0 = byte, 1 = short, 2 = long) */
967 16, /* bitsize */
968 FALSE, /* pc_relative */
969 0, /* bitpos */
970 complain_overflow_signed, /* complain_on_overflow */
971 ppc64_elf_toc_reloc, /* special_function */
972 "R_PPC64_TOC16", /* name */
973 FALSE, /* partial_inplace */
974 0, /* src_mask */
975 0xffff, /* dst_mask */
976 FALSE), /* pcrel_offset */
977
978 /* 16 bit TOC-relative relocation without overflow. */
979
980 /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
981 HOWTO (R_PPC64_TOC16_LO, /* type */
982 0, /* rightshift */
983 1, /* size (0 = byte, 1 = short, 2 = long) */
984 16, /* bitsize */
985 FALSE, /* pc_relative */
986 0, /* bitpos */
987 complain_overflow_dont, /* complain_on_overflow */
988 ppc64_elf_toc_reloc, /* special_function */
989 "R_PPC64_TOC16_LO", /* name */
990 FALSE, /* partial_inplace */
991 0, /* src_mask */
992 0xffff, /* dst_mask */
993 FALSE), /* pcrel_offset */
994
995 /* 16 bit TOC-relative relocation, high 16 bits. */
996
997 /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
998 HOWTO (R_PPC64_TOC16_HI, /* type */
999 16, /* rightshift */
1000 1, /* size (0 = byte, 1 = short, 2 = long) */
1001 16, /* bitsize */
1002 FALSE, /* pc_relative */
1003 0, /* bitpos */
1004 complain_overflow_signed, /* complain_on_overflow */
1005 ppc64_elf_toc_reloc, /* special_function */
1006 "R_PPC64_TOC16_HI", /* name */
1007 FALSE, /* partial_inplace */
1008 0, /* src_mask */
1009 0xffff, /* dst_mask */
1010 FALSE), /* pcrel_offset */
1011
1012 /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the
1013 contents of the low 16 bits, treated as a signed number, is
1014 negative. */
1015
1016 /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
1017 HOWTO (R_PPC64_TOC16_HA, /* type */
1018 16, /* rightshift */
1019 1, /* size (0 = byte, 1 = short, 2 = long) */
1020 16, /* bitsize */
1021 FALSE, /* pc_relative */
1022 0, /* bitpos */
1023 complain_overflow_signed, /* complain_on_overflow */
1024 ppc64_elf_toc_ha_reloc, /* special_function */
1025 "R_PPC64_TOC16_HA", /* name */
1026 FALSE, /* partial_inplace */
1027 0, /* src_mask */
1028 0xffff, /* dst_mask */
1029 FALSE), /* pcrel_offset */
1030
1031 /* 64-bit relocation; insert value of TOC base (.TOC.). */
1032
1033 /* R_PPC64_TOC 51 doubleword64 .TOC. */
1034 HOWTO (R_PPC64_TOC, /* type */
1035 0, /* rightshift */
1036 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1037 64, /* bitsize */
1038 FALSE, /* pc_relative */
1039 0, /* bitpos */
1040 complain_overflow_dont, /* complain_on_overflow */
1041 ppc64_elf_toc64_reloc, /* special_function */
1042 "R_PPC64_TOC", /* name */
1043 FALSE, /* partial_inplace */
1044 0, /* src_mask */
1045 ONES (64), /* dst_mask */
1046 FALSE), /* pcrel_offset */
1047
1048 /* Like R_PPC64_GOT16, but also informs the link editor that the
1049 value to relocate may (!) refer to a PLT entry which the link
1050 editor (a) may replace with the symbol value. If the link editor
1051 is unable to fully resolve the symbol, it may (b) create a PLT
1052 entry and store the address to the new PLT entry in the GOT.
1053 This permits lazy resolution of function symbols at run time.
1054 The link editor may also skip all of this and just (c) emit a
1055 R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
1056 /* FIXME: R_PPC64_PLTGOT16 not implemented. */
1057 HOWTO (R_PPC64_PLTGOT16, /* type */
1058 0, /* rightshift */
1059 1, /* size (0 = byte, 1 = short, 2 = long) */
1060 16, /* bitsize */
1061 FALSE, /* pc_relative */
1062 0, /* bitpos */
1063 complain_overflow_signed, /* complain_on_overflow */
1064 ppc64_elf_unhandled_reloc, /* special_function */
1065 "R_PPC64_PLTGOT16", /* name */
1066 FALSE, /* partial_inplace */
1067 0, /* src_mask */
1068 0xffff, /* dst_mask */
1069 FALSE), /* pcrel_offset */
1070
1071 /* Like R_PPC64_PLTGOT16, but without overflow. */
1072 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1073 HOWTO (R_PPC64_PLTGOT16_LO, /* type */
1074 0, /* rightshift */
1075 1, /* size (0 = byte, 1 = short, 2 = long) */
1076 16, /* bitsize */
1077 FALSE, /* pc_relative */
1078 0, /* bitpos */
1079 complain_overflow_dont, /* complain_on_overflow */
1080 ppc64_elf_unhandled_reloc, /* special_function */
1081 "R_PPC64_PLTGOT16_LO", /* name */
1082 FALSE, /* partial_inplace */
1083 0, /* src_mask */
1084 0xffff, /* dst_mask */
1085 FALSE), /* pcrel_offset */
1086
1087 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */
1088 /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */
1089 HOWTO (R_PPC64_PLTGOT16_HI, /* type */
1090 16, /* rightshift */
1091 1, /* size (0 = byte, 1 = short, 2 = long) */
1092 16, /* bitsize */
1093 FALSE, /* pc_relative */
1094 0, /* bitpos */
1095 complain_overflow_signed, /* complain_on_overflow */
1096 ppc64_elf_unhandled_reloc, /* special_function */
1097 "R_PPC64_PLTGOT16_HI", /* name */
1098 FALSE, /* partial_inplace */
1099 0, /* src_mask */
1100 0xffff, /* dst_mask */
1101 FALSE), /* pcrel_offset */
1102
1103 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus
1104 1 if the contents of the low 16 bits, treated as a signed number,
1105 is negative. */
1106 /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */
1107 HOWTO (R_PPC64_PLTGOT16_HA, /* type */
1108 16, /* rightshift */
1109 1, /* size (0 = byte, 1 = short, 2 = long) */
1110 16, /* bitsize */
1111 FALSE, /* pc_relative */
1112 0, /* bitpos */
1113 complain_overflow_signed, /* complain_on_overflow */
1114 ppc64_elf_unhandled_reloc, /* special_function */
1115 "R_PPC64_PLTGOT16_HA", /* name */
1116 FALSE, /* partial_inplace */
1117 0, /* src_mask */
1118 0xffff, /* dst_mask */
1119 FALSE), /* pcrel_offset */
1120
1121 /* Like R_PPC64_ADDR16, but for instructions with a DS field. */
1122 HOWTO (R_PPC64_ADDR16_DS, /* type */
1123 0, /* rightshift */
1124 1, /* size (0 = byte, 1 = short, 2 = long) */
1125 16, /* bitsize */
1126 FALSE, /* pc_relative */
1127 0, /* bitpos */
1128 complain_overflow_signed, /* complain_on_overflow */
1129 bfd_elf_generic_reloc, /* special_function */
1130 "R_PPC64_ADDR16_DS", /* name */
1131 FALSE, /* partial_inplace */
1132 0, /* src_mask */
1133 0xfffc, /* dst_mask */
1134 FALSE), /* pcrel_offset */
1135
1136 /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
1137 HOWTO (R_PPC64_ADDR16_LO_DS, /* type */
1138 0, /* rightshift */
1139 1, /* size (0 = byte, 1 = short, 2 = long) */
1140 16, /* bitsize */
1141 FALSE, /* pc_relative */
1142 0, /* bitpos */
1143 complain_overflow_dont,/* complain_on_overflow */
1144 bfd_elf_generic_reloc, /* special_function */
1145 "R_PPC64_ADDR16_LO_DS",/* name */
1146 FALSE, /* partial_inplace */
1147 0, /* src_mask */
1148 0xfffc, /* dst_mask */
1149 FALSE), /* pcrel_offset */
1150
1151 /* Like R_PPC64_GOT16, but for instructions with a DS field. */
1152 HOWTO (R_PPC64_GOT16_DS, /* type */
1153 0, /* rightshift */
1154 1, /* size (0 = byte, 1 = short, 2 = long) */
1155 16, /* bitsize */
1156 FALSE, /* pc_relative */
1157 0, /* bitpos */
1158 complain_overflow_signed, /* complain_on_overflow */
1159 ppc64_elf_unhandled_reloc, /* special_function */
1160 "R_PPC64_GOT16_DS", /* name */
1161 FALSE, /* partial_inplace */
1162 0, /* src_mask */
1163 0xfffc, /* dst_mask */
1164 FALSE), /* pcrel_offset */
1165
1166 /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
1167 HOWTO (R_PPC64_GOT16_LO_DS, /* type */
1168 0, /* rightshift */
1169 1, /* size (0 = byte, 1 = short, 2 = long) */
1170 16, /* bitsize */
1171 FALSE, /* pc_relative */
1172 0, /* bitpos */
1173 complain_overflow_dont, /* complain_on_overflow */
1174 ppc64_elf_unhandled_reloc, /* special_function */
1175 "R_PPC64_GOT16_LO_DS", /* name */
1176 FALSE, /* partial_inplace */
1177 0, /* src_mask */
1178 0xfffc, /* dst_mask */
1179 FALSE), /* pcrel_offset */
1180
1181 /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
1182 HOWTO (R_PPC64_PLT16_LO_DS, /* type */
1183 0, /* rightshift */
1184 1, /* size (0 = byte, 1 = short, 2 = long) */
1185 16, /* bitsize */
1186 FALSE, /* pc_relative */
1187 0, /* bitpos */
1188 complain_overflow_dont, /* complain_on_overflow */
1189 ppc64_elf_unhandled_reloc, /* special_function */
1190 "R_PPC64_PLT16_LO_DS", /* name */
1191 FALSE, /* partial_inplace */
1192 0, /* src_mask */
1193 0xfffc, /* dst_mask */
1194 FALSE), /* pcrel_offset */
1195
1196 /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
1197 HOWTO (R_PPC64_SECTOFF_DS, /* type */
1198 0, /* rightshift */
1199 1, /* size (0 = byte, 1 = short, 2 = long) */
1200 16, /* bitsize */
1201 FALSE, /* pc_relative */
1202 0, /* bitpos */
1203 complain_overflow_signed, /* complain_on_overflow */
1204 ppc64_elf_sectoff_reloc, /* special_function */
1205 "R_PPC64_SECTOFF_DS", /* name */
1206 FALSE, /* partial_inplace */
1207 0, /* src_mask */
1208 0xfffc, /* dst_mask */
1209 FALSE), /* pcrel_offset */
1210
1211 /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
1212 HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */
1213 0, /* rightshift */
1214 1, /* size (0 = byte, 1 = short, 2 = long) */
1215 16, /* bitsize */
1216 FALSE, /* pc_relative */
1217 0, /* bitpos */
1218 complain_overflow_dont, /* complain_on_overflow */
1219 ppc64_elf_sectoff_reloc, /* special_function */
1220 "R_PPC64_SECTOFF_LO_DS",/* name */
1221 FALSE, /* partial_inplace */
1222 0, /* src_mask */
1223 0xfffc, /* dst_mask */
1224 FALSE), /* pcrel_offset */
1225
1226 /* Like R_PPC64_TOC16, but for instructions with a DS field. */
1227 HOWTO (R_PPC64_TOC16_DS, /* type */
1228 0, /* rightshift */
1229 1, /* size (0 = byte, 1 = short, 2 = long) */
1230 16, /* bitsize */
1231 FALSE, /* pc_relative */
1232 0, /* bitpos */
1233 complain_overflow_signed, /* complain_on_overflow */
1234 ppc64_elf_toc_reloc, /* special_function */
1235 "R_PPC64_TOC16_DS", /* name */
1236 FALSE, /* partial_inplace */
1237 0, /* src_mask */
1238 0xfffc, /* dst_mask */
1239 FALSE), /* pcrel_offset */
1240
1241 /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
1242 HOWTO (R_PPC64_TOC16_LO_DS, /* type */
1243 0, /* rightshift */
1244 1, /* size (0 = byte, 1 = short, 2 = long) */
1245 16, /* bitsize */
1246 FALSE, /* pc_relative */
1247 0, /* bitpos */
1248 complain_overflow_dont, /* complain_on_overflow */
1249 ppc64_elf_toc_reloc, /* special_function */
1250 "R_PPC64_TOC16_LO_DS", /* name */
1251 FALSE, /* partial_inplace */
1252 0, /* src_mask */
1253 0xfffc, /* dst_mask */
1254 FALSE), /* pcrel_offset */
1255
1256 /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
1257 /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
1258 HOWTO (R_PPC64_PLTGOT16_DS, /* type */
1259 0, /* rightshift */
1260 1, /* size (0 = byte, 1 = short, 2 = long) */
1261 16, /* bitsize */
1262 FALSE, /* pc_relative */
1263 0, /* bitpos */
1264 complain_overflow_signed, /* complain_on_overflow */
1265 ppc64_elf_unhandled_reloc, /* special_function */
1266 "R_PPC64_PLTGOT16_DS", /* name */
1267 FALSE, /* partial_inplace */
1268 0, /* src_mask */
1269 0xfffc, /* dst_mask */
1270 FALSE), /* pcrel_offset */
1271
1272 /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */
1273 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1274 HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */
1275 0, /* rightshift */
1276 1, /* size (0 = byte, 1 = short, 2 = long) */
1277 16, /* bitsize */
1278 FALSE, /* pc_relative */
1279 0, /* bitpos */
1280 complain_overflow_dont, /* complain_on_overflow */
1281 ppc64_elf_unhandled_reloc, /* special_function */
1282 "R_PPC64_PLTGOT16_LO_DS",/* name */
1283 FALSE, /* partial_inplace */
1284 0, /* src_mask */
1285 0xfffc, /* dst_mask */
1286 FALSE), /* pcrel_offset */
1287
1288 /* Marker relocs for TLS. */
1289 HOWTO (R_PPC64_TLS,
1290 0, /* rightshift */
1291 2, /* size (0 = byte, 1 = short, 2 = long) */
1292 32, /* bitsize */
1293 FALSE, /* pc_relative */
1294 0, /* bitpos */
1295 complain_overflow_dont, /* complain_on_overflow */
1296 bfd_elf_generic_reloc, /* special_function */
1297 "R_PPC64_TLS", /* name */
1298 FALSE, /* partial_inplace */
1299 0, /* src_mask */
1300 0, /* dst_mask */
1301 FALSE), /* pcrel_offset */
1302
1303 HOWTO (R_PPC64_TLSGD,
1304 0, /* rightshift */
1305 2, /* size (0 = byte, 1 = short, 2 = long) */
1306 32, /* bitsize */
1307 FALSE, /* pc_relative */
1308 0, /* bitpos */
1309 complain_overflow_dont, /* complain_on_overflow */
1310 bfd_elf_generic_reloc, /* special_function */
1311 "R_PPC64_TLSGD", /* name */
1312 FALSE, /* partial_inplace */
1313 0, /* src_mask */
1314 0, /* dst_mask */
1315 FALSE), /* pcrel_offset */
1316
1317 HOWTO (R_PPC64_TLSLD,
1318 0, /* rightshift */
1319 2, /* size (0 = byte, 1 = short, 2 = long) */
1320 32, /* bitsize */
1321 FALSE, /* pc_relative */
1322 0, /* bitpos */
1323 complain_overflow_dont, /* complain_on_overflow */
1324 bfd_elf_generic_reloc, /* special_function */
1325 "R_PPC64_TLSLD", /* name */
1326 FALSE, /* partial_inplace */
1327 0, /* src_mask */
1328 0, /* dst_mask */
1329 FALSE), /* pcrel_offset */
1330
1331 HOWTO (R_PPC64_TOCSAVE,
1332 0, /* rightshift */
1333 2, /* size (0 = byte, 1 = short, 2 = long) */
1334 32, /* bitsize */
1335 FALSE, /* pc_relative */
1336 0, /* bitpos */
1337 complain_overflow_dont, /* complain_on_overflow */
1338 bfd_elf_generic_reloc, /* special_function */
1339 "R_PPC64_TOCSAVE", /* name */
1340 FALSE, /* partial_inplace */
1341 0, /* src_mask */
1342 0, /* dst_mask */
1343 FALSE), /* pcrel_offset */
1344
1345 /* Computes the load module index of the load module that contains the
1346 definition of its TLS sym. */
1347 HOWTO (R_PPC64_DTPMOD64,
1348 0, /* rightshift */
1349 4, /* size (0 = byte, 1 = short, 2 = long) */
1350 64, /* bitsize */
1351 FALSE, /* pc_relative */
1352 0, /* bitpos */
1353 complain_overflow_dont, /* complain_on_overflow */
1354 ppc64_elf_unhandled_reloc, /* special_function */
1355 "R_PPC64_DTPMOD64", /* name */
1356 FALSE, /* partial_inplace */
1357 0, /* src_mask */
1358 ONES (64), /* dst_mask */
1359 FALSE), /* pcrel_offset */
1360
1361 /* Computes a dtv-relative displacement, the difference between the value
1362 of sym+add and the base address of the thread-local storage block that
1363 contains the definition of sym, minus 0x8000. */
1364 HOWTO (R_PPC64_DTPREL64,
1365 0, /* rightshift */
1366 4, /* size (0 = byte, 1 = short, 2 = long) */
1367 64, /* bitsize */
1368 FALSE, /* pc_relative */
1369 0, /* bitpos */
1370 complain_overflow_dont, /* complain_on_overflow */
1371 ppc64_elf_unhandled_reloc, /* special_function */
1372 "R_PPC64_DTPREL64", /* name */
1373 FALSE, /* partial_inplace */
1374 0, /* src_mask */
1375 ONES (64), /* dst_mask */
1376 FALSE), /* pcrel_offset */
1377
1378 /* A 16 bit dtprel reloc. */
1379 HOWTO (R_PPC64_DTPREL16,
1380 0, /* rightshift */
1381 1, /* size (0 = byte, 1 = short, 2 = long) */
1382 16, /* bitsize */
1383 FALSE, /* pc_relative */
1384 0, /* bitpos */
1385 complain_overflow_signed, /* complain_on_overflow */
1386 ppc64_elf_unhandled_reloc, /* special_function */
1387 "R_PPC64_DTPREL16", /* name */
1388 FALSE, /* partial_inplace */
1389 0, /* src_mask */
1390 0xffff, /* dst_mask */
1391 FALSE), /* pcrel_offset */
1392
1393 /* Like DTPREL16, but no overflow. */
1394 HOWTO (R_PPC64_DTPREL16_LO,
1395 0, /* rightshift */
1396 1, /* size (0 = byte, 1 = short, 2 = long) */
1397 16, /* bitsize */
1398 FALSE, /* pc_relative */
1399 0, /* bitpos */
1400 complain_overflow_dont, /* complain_on_overflow */
1401 ppc64_elf_unhandled_reloc, /* special_function */
1402 "R_PPC64_DTPREL16_LO", /* name */
1403 FALSE, /* partial_inplace */
1404 0, /* src_mask */
1405 0xffff, /* dst_mask */
1406 FALSE), /* pcrel_offset */
1407
1408 /* Like DTPREL16_LO, but next higher group of 16 bits. */
1409 HOWTO (R_PPC64_DTPREL16_HI,
1410 16, /* rightshift */
1411 1, /* size (0 = byte, 1 = short, 2 = long) */
1412 16, /* bitsize */
1413 FALSE, /* pc_relative */
1414 0, /* bitpos */
1415 complain_overflow_signed, /* complain_on_overflow */
1416 ppc64_elf_unhandled_reloc, /* special_function */
1417 "R_PPC64_DTPREL16_HI", /* name */
1418 FALSE, /* partial_inplace */
1419 0, /* src_mask */
1420 0xffff, /* dst_mask */
1421 FALSE), /* pcrel_offset */
1422
1423 /* Like DTPREL16_HI, but adjust for low 16 bits. */
1424 HOWTO (R_PPC64_DTPREL16_HA,
1425 16, /* rightshift */
1426 1, /* size (0 = byte, 1 = short, 2 = long) */
1427 16, /* bitsize */
1428 FALSE, /* pc_relative */
1429 0, /* bitpos */
1430 complain_overflow_signed, /* complain_on_overflow */
1431 ppc64_elf_unhandled_reloc, /* special_function */
1432 "R_PPC64_DTPREL16_HA", /* name */
1433 FALSE, /* partial_inplace */
1434 0, /* src_mask */
1435 0xffff, /* dst_mask */
1436 FALSE), /* pcrel_offset */
1437
1438 /* Like DTPREL16_HI, but next higher group of 16 bits. */
1439 HOWTO (R_PPC64_DTPREL16_HIGHER,
1440 32, /* rightshift */
1441 1, /* size (0 = byte, 1 = short, 2 = long) */
1442 16, /* bitsize */
1443 FALSE, /* pc_relative */
1444 0, /* bitpos */
1445 complain_overflow_dont, /* complain_on_overflow */
1446 ppc64_elf_unhandled_reloc, /* special_function */
1447 "R_PPC64_DTPREL16_HIGHER", /* name */
1448 FALSE, /* partial_inplace */
1449 0, /* src_mask */
1450 0xffff, /* dst_mask */
1451 FALSE), /* pcrel_offset */
1452
1453 /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */
1454 HOWTO (R_PPC64_DTPREL16_HIGHERA,
1455 32, /* rightshift */
1456 1, /* size (0 = byte, 1 = short, 2 = long) */
1457 16, /* bitsize */
1458 FALSE, /* pc_relative */
1459 0, /* bitpos */
1460 complain_overflow_dont, /* complain_on_overflow */
1461 ppc64_elf_unhandled_reloc, /* special_function */
1462 "R_PPC64_DTPREL16_HIGHERA", /* name */
1463 FALSE, /* partial_inplace */
1464 0, /* src_mask */
1465 0xffff, /* dst_mask */
1466 FALSE), /* pcrel_offset */
1467
1468 /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */
1469 HOWTO (R_PPC64_DTPREL16_HIGHEST,
1470 48, /* rightshift */
1471 1, /* size (0 = byte, 1 = short, 2 = long) */
1472 16, /* bitsize */
1473 FALSE, /* pc_relative */
1474 0, /* bitpos */
1475 complain_overflow_dont, /* complain_on_overflow */
1476 ppc64_elf_unhandled_reloc, /* special_function */
1477 "R_PPC64_DTPREL16_HIGHEST", /* name */
1478 FALSE, /* partial_inplace */
1479 0, /* src_mask */
1480 0xffff, /* dst_mask */
1481 FALSE), /* pcrel_offset */
1482
1483 /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */
1484 HOWTO (R_PPC64_DTPREL16_HIGHESTA,
1485 48, /* rightshift */
1486 1, /* size (0 = byte, 1 = short, 2 = long) */
1487 16, /* bitsize */
1488 FALSE, /* pc_relative */
1489 0, /* bitpos */
1490 complain_overflow_dont, /* complain_on_overflow */
1491 ppc64_elf_unhandled_reloc, /* special_function */
1492 "R_PPC64_DTPREL16_HIGHESTA", /* name */
1493 FALSE, /* partial_inplace */
1494 0, /* src_mask */
1495 0xffff, /* dst_mask */
1496 FALSE), /* pcrel_offset */
1497
1498 /* Like DTPREL16, but for insns with a DS field. */
1499 HOWTO (R_PPC64_DTPREL16_DS,
1500 0, /* rightshift */
1501 1, /* size (0 = byte, 1 = short, 2 = long) */
1502 16, /* bitsize */
1503 FALSE, /* pc_relative */
1504 0, /* bitpos */
1505 complain_overflow_signed, /* complain_on_overflow */
1506 ppc64_elf_unhandled_reloc, /* special_function */
1507 "R_PPC64_DTPREL16_DS", /* name */
1508 FALSE, /* partial_inplace */
1509 0, /* src_mask */
1510 0xfffc, /* dst_mask */
1511 FALSE), /* pcrel_offset */
1512
1513 /* Like DTPREL16_DS, but no overflow. */
1514 HOWTO (R_PPC64_DTPREL16_LO_DS,
1515 0, /* rightshift */
1516 1, /* size (0 = byte, 1 = short, 2 = long) */
1517 16, /* bitsize */
1518 FALSE, /* pc_relative */
1519 0, /* bitpos */
1520 complain_overflow_dont, /* complain_on_overflow */
1521 ppc64_elf_unhandled_reloc, /* special_function */
1522 "R_PPC64_DTPREL16_LO_DS", /* name */
1523 FALSE, /* partial_inplace */
1524 0, /* src_mask */
1525 0xfffc, /* dst_mask */
1526 FALSE), /* pcrel_offset */
1527
1528 /* Computes a tp-relative displacement, the difference between the value of
1529 sym+add and the value of the thread pointer (r13). */
1530 HOWTO (R_PPC64_TPREL64,
1531 0, /* rightshift */
1532 4, /* size (0 = byte, 1 = short, 2 = long) */
1533 64, /* bitsize */
1534 FALSE, /* pc_relative */
1535 0, /* bitpos */
1536 complain_overflow_dont, /* complain_on_overflow */
1537 ppc64_elf_unhandled_reloc, /* special_function */
1538 "R_PPC64_TPREL64", /* name */
1539 FALSE, /* partial_inplace */
1540 0, /* src_mask */
1541 ONES (64), /* dst_mask */
1542 FALSE), /* pcrel_offset */
1543
1544 /* A 16 bit tprel reloc. */
1545 HOWTO (R_PPC64_TPREL16,
1546 0, /* rightshift */
1547 1, /* size (0 = byte, 1 = short, 2 = long) */
1548 16, /* bitsize */
1549 FALSE, /* pc_relative */
1550 0, /* bitpos */
1551 complain_overflow_signed, /* complain_on_overflow */
1552 ppc64_elf_unhandled_reloc, /* special_function */
1553 "R_PPC64_TPREL16", /* name */
1554 FALSE, /* partial_inplace */
1555 0, /* src_mask */
1556 0xffff, /* dst_mask */
1557 FALSE), /* pcrel_offset */
1558
1559 /* Like TPREL16, but no overflow. */
1560 HOWTO (R_PPC64_TPREL16_LO,
1561 0, /* rightshift */
1562 1, /* size (0 = byte, 1 = short, 2 = long) */
1563 16, /* bitsize */
1564 FALSE, /* pc_relative */
1565 0, /* bitpos */
1566 complain_overflow_dont, /* complain_on_overflow */
1567 ppc64_elf_unhandled_reloc, /* special_function */
1568 "R_PPC64_TPREL16_LO", /* name */
1569 FALSE, /* partial_inplace */
1570 0, /* src_mask */
1571 0xffff, /* dst_mask */
1572 FALSE), /* pcrel_offset */
1573
1574 /* Like TPREL16_LO, but next higher group of 16 bits. */
1575 HOWTO (R_PPC64_TPREL16_HI,
1576 16, /* rightshift */
1577 1, /* size (0 = byte, 1 = short, 2 = long) */
1578 16, /* bitsize */
1579 FALSE, /* pc_relative */
1580 0, /* bitpos */
1581 complain_overflow_signed, /* complain_on_overflow */
1582 ppc64_elf_unhandled_reloc, /* special_function */
1583 "R_PPC64_TPREL16_HI", /* name */
1584 FALSE, /* partial_inplace */
1585 0, /* src_mask */
1586 0xffff, /* dst_mask */
1587 FALSE), /* pcrel_offset */
1588
1589 /* Like TPREL16_HI, but adjust for low 16 bits. */
1590 HOWTO (R_PPC64_TPREL16_HA,
1591 16, /* rightshift */
1592 1, /* size (0 = byte, 1 = short, 2 = long) */
1593 16, /* bitsize */
1594 FALSE, /* pc_relative */
1595 0, /* bitpos */
1596 complain_overflow_signed, /* complain_on_overflow */
1597 ppc64_elf_unhandled_reloc, /* special_function */
1598 "R_PPC64_TPREL16_HA", /* name */
1599 FALSE, /* partial_inplace */
1600 0, /* src_mask */
1601 0xffff, /* dst_mask */
1602 FALSE), /* pcrel_offset */
1603
1604 /* Like TPREL16_HI, but next higher group of 16 bits. */
1605 HOWTO (R_PPC64_TPREL16_HIGHER,
1606 32, /* rightshift */
1607 1, /* size (0 = byte, 1 = short, 2 = long) */
1608 16, /* bitsize */
1609 FALSE, /* pc_relative */
1610 0, /* bitpos */
1611 complain_overflow_dont, /* complain_on_overflow */
1612 ppc64_elf_unhandled_reloc, /* special_function */
1613 "R_PPC64_TPREL16_HIGHER", /* name */
1614 FALSE, /* partial_inplace */
1615 0, /* src_mask */
1616 0xffff, /* dst_mask */
1617 FALSE), /* pcrel_offset */
1618
1619 /* Like TPREL16_HIGHER, but adjust for low 16 bits. */
1620 HOWTO (R_PPC64_TPREL16_HIGHERA,
1621 32, /* rightshift */
1622 1, /* size (0 = byte, 1 = short, 2 = long) */
1623 16, /* bitsize */
1624 FALSE, /* pc_relative */
1625 0, /* bitpos */
1626 complain_overflow_dont, /* complain_on_overflow */
1627 ppc64_elf_unhandled_reloc, /* special_function */
1628 "R_PPC64_TPREL16_HIGHERA", /* name */
1629 FALSE, /* partial_inplace */
1630 0, /* src_mask */
1631 0xffff, /* dst_mask */
1632 FALSE), /* pcrel_offset */
1633
1634 /* Like TPREL16_HIGHER, but next higher group of 16 bits. */
1635 HOWTO (R_PPC64_TPREL16_HIGHEST,
1636 48, /* rightshift */
1637 1, /* size (0 = byte, 1 = short, 2 = long) */
1638 16, /* bitsize */
1639 FALSE, /* pc_relative */
1640 0, /* bitpos */
1641 complain_overflow_dont, /* complain_on_overflow */
1642 ppc64_elf_unhandled_reloc, /* special_function */
1643 "R_PPC64_TPREL16_HIGHEST", /* name */
1644 FALSE, /* partial_inplace */
1645 0, /* src_mask */
1646 0xffff, /* dst_mask */
1647 FALSE), /* pcrel_offset */
1648
1649 /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */
1650 HOWTO (R_PPC64_TPREL16_HIGHESTA,
1651 48, /* rightshift */
1652 1, /* size (0 = byte, 1 = short, 2 = long) */
1653 16, /* bitsize */
1654 FALSE, /* pc_relative */
1655 0, /* bitpos */
1656 complain_overflow_dont, /* complain_on_overflow */
1657 ppc64_elf_unhandled_reloc, /* special_function */
1658 "R_PPC64_TPREL16_HIGHESTA", /* name */
1659 FALSE, /* partial_inplace */
1660 0, /* src_mask */
1661 0xffff, /* dst_mask */
1662 FALSE), /* pcrel_offset */
1663
1664 /* Like TPREL16, but for insns with a DS field. */
1665 HOWTO (R_PPC64_TPREL16_DS,
1666 0, /* rightshift */
1667 1, /* size (0 = byte, 1 = short, 2 = long) */
1668 16, /* bitsize */
1669 FALSE, /* pc_relative */
1670 0, /* bitpos */
1671 complain_overflow_signed, /* complain_on_overflow */
1672 ppc64_elf_unhandled_reloc, /* special_function */
1673 "R_PPC64_TPREL16_DS", /* name */
1674 FALSE, /* partial_inplace */
1675 0, /* src_mask */
1676 0xfffc, /* dst_mask */
1677 FALSE), /* pcrel_offset */
1678
1679 /* Like TPREL16_DS, but no overflow. */
1680 HOWTO (R_PPC64_TPREL16_LO_DS,
1681 0, /* rightshift */
1682 1, /* size (0 = byte, 1 = short, 2 = long) */
1683 16, /* bitsize */
1684 FALSE, /* pc_relative */
1685 0, /* bitpos */
1686 complain_overflow_dont, /* complain_on_overflow */
1687 ppc64_elf_unhandled_reloc, /* special_function */
1688 "R_PPC64_TPREL16_LO_DS", /* name */
1689 FALSE, /* partial_inplace */
1690 0, /* src_mask */
1691 0xfffc, /* dst_mask */
1692 FALSE), /* pcrel_offset */
1693
1694 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1695 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1696 to the first entry relative to the TOC base (r2). */
1697 HOWTO (R_PPC64_GOT_TLSGD16,
1698 0, /* rightshift */
1699 1, /* size (0 = byte, 1 = short, 2 = long) */
1700 16, /* bitsize */
1701 FALSE, /* pc_relative */
1702 0, /* bitpos */
1703 complain_overflow_signed, /* complain_on_overflow */
1704 ppc64_elf_unhandled_reloc, /* special_function */
1705 "R_PPC64_GOT_TLSGD16", /* name */
1706 FALSE, /* partial_inplace */
1707 0, /* src_mask */
1708 0xffff, /* dst_mask */
1709 FALSE), /* pcrel_offset */
1710
1711 /* Like GOT_TLSGD16, but no overflow. */
1712 HOWTO (R_PPC64_GOT_TLSGD16_LO,
1713 0, /* rightshift */
1714 1, /* size (0 = byte, 1 = short, 2 = long) */
1715 16, /* bitsize */
1716 FALSE, /* pc_relative */
1717 0, /* bitpos */
1718 complain_overflow_dont, /* complain_on_overflow */
1719 ppc64_elf_unhandled_reloc, /* special_function */
1720 "R_PPC64_GOT_TLSGD16_LO", /* name */
1721 FALSE, /* partial_inplace */
1722 0, /* src_mask */
1723 0xffff, /* dst_mask */
1724 FALSE), /* pcrel_offset */
1725
1726 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1727 HOWTO (R_PPC64_GOT_TLSGD16_HI,
1728 16, /* rightshift */
1729 1, /* size (0 = byte, 1 = short, 2 = long) */
1730 16, /* bitsize */
1731 FALSE, /* pc_relative */
1732 0, /* bitpos */
1733 complain_overflow_signed, /* complain_on_overflow */
1734 ppc64_elf_unhandled_reloc, /* special_function */
1735 "R_PPC64_GOT_TLSGD16_HI", /* name */
1736 FALSE, /* partial_inplace */
1737 0, /* src_mask */
1738 0xffff, /* dst_mask */
1739 FALSE), /* pcrel_offset */
1740
1741 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1742 HOWTO (R_PPC64_GOT_TLSGD16_HA,
1743 16, /* rightshift */
1744 1, /* size (0 = byte, 1 = short, 2 = long) */
1745 16, /* bitsize */
1746 FALSE, /* pc_relative */
1747 0, /* bitpos */
1748 complain_overflow_signed, /* complain_on_overflow */
1749 ppc64_elf_unhandled_reloc, /* special_function */
1750 "R_PPC64_GOT_TLSGD16_HA", /* name */
1751 FALSE, /* partial_inplace */
1752 0, /* src_mask */
1753 0xffff, /* dst_mask */
1754 FALSE), /* pcrel_offset */
1755
1756 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1757 with values (sym+add)@dtpmod and zero, and computes the offset to the
1758 first entry relative to the TOC base (r2). */
1759 HOWTO (R_PPC64_GOT_TLSLD16,
1760 0, /* rightshift */
1761 1, /* size (0 = byte, 1 = short, 2 = long) */
1762 16, /* bitsize */
1763 FALSE, /* pc_relative */
1764 0, /* bitpos */
1765 complain_overflow_signed, /* complain_on_overflow */
1766 ppc64_elf_unhandled_reloc, /* special_function */
1767 "R_PPC64_GOT_TLSLD16", /* name */
1768 FALSE, /* partial_inplace */
1769 0, /* src_mask */
1770 0xffff, /* dst_mask */
1771 FALSE), /* pcrel_offset */
1772
1773 /* Like GOT_TLSLD16, but no overflow. */
1774 HOWTO (R_PPC64_GOT_TLSLD16_LO,
1775 0, /* rightshift */
1776 1, /* size (0 = byte, 1 = short, 2 = long) */
1777 16, /* bitsize */
1778 FALSE, /* pc_relative */
1779 0, /* bitpos */
1780 complain_overflow_dont, /* complain_on_overflow */
1781 ppc64_elf_unhandled_reloc, /* special_function */
1782 "R_PPC64_GOT_TLSLD16_LO", /* name */
1783 FALSE, /* partial_inplace */
1784 0, /* src_mask */
1785 0xffff, /* dst_mask */
1786 FALSE), /* pcrel_offset */
1787
1788 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1789 HOWTO (R_PPC64_GOT_TLSLD16_HI,
1790 16, /* rightshift */
1791 1, /* size (0 = byte, 1 = short, 2 = long) */
1792 16, /* bitsize */
1793 FALSE, /* pc_relative */
1794 0, /* bitpos */
1795 complain_overflow_signed, /* complain_on_overflow */
1796 ppc64_elf_unhandled_reloc, /* special_function */
1797 "R_PPC64_GOT_TLSLD16_HI", /* name */
1798 FALSE, /* partial_inplace */
1799 0, /* src_mask */
1800 0xffff, /* dst_mask */
1801 FALSE), /* pcrel_offset */
1802
1803 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1804 HOWTO (R_PPC64_GOT_TLSLD16_HA,
1805 16, /* rightshift */
1806 1, /* size (0 = byte, 1 = short, 2 = long) */
1807 16, /* bitsize */
1808 FALSE, /* pc_relative */
1809 0, /* bitpos */
1810 complain_overflow_signed, /* complain_on_overflow */
1811 ppc64_elf_unhandled_reloc, /* special_function */
1812 "R_PPC64_GOT_TLSLD16_HA", /* name */
1813 FALSE, /* partial_inplace */
1814 0, /* src_mask */
1815 0xffff, /* dst_mask */
1816 FALSE), /* pcrel_offset */
1817
1818 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1819 the offset to the entry relative to the TOC base (r2). */
1820 HOWTO (R_PPC64_GOT_DTPREL16_DS,
1821 0, /* rightshift */
1822 1, /* size (0 = byte, 1 = short, 2 = long) */
1823 16, /* bitsize */
1824 FALSE, /* pc_relative */
1825 0, /* bitpos */
1826 complain_overflow_signed, /* complain_on_overflow */
1827 ppc64_elf_unhandled_reloc, /* special_function */
1828 "R_PPC64_GOT_DTPREL16_DS", /* name */
1829 FALSE, /* partial_inplace */
1830 0, /* src_mask */
1831 0xfffc, /* dst_mask */
1832 FALSE), /* pcrel_offset */
1833
1834 /* Like GOT_DTPREL16_DS, but no overflow. */
1835 HOWTO (R_PPC64_GOT_DTPREL16_LO_DS,
1836 0, /* rightshift */
1837 1, /* size (0 = byte, 1 = short, 2 = long) */
1838 16, /* bitsize */
1839 FALSE, /* pc_relative */
1840 0, /* bitpos */
1841 complain_overflow_dont, /* complain_on_overflow */
1842 ppc64_elf_unhandled_reloc, /* special_function */
1843 "R_PPC64_GOT_DTPREL16_LO_DS", /* name */
1844 FALSE, /* partial_inplace */
1845 0, /* src_mask */
1846 0xfffc, /* dst_mask */
1847 FALSE), /* pcrel_offset */
1848
1849 /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */
1850 HOWTO (R_PPC64_GOT_DTPREL16_HI,
1851 16, /* rightshift */
1852 1, /* size (0 = byte, 1 = short, 2 = long) */
1853 16, /* bitsize */
1854 FALSE, /* pc_relative */
1855 0, /* bitpos */
1856 complain_overflow_signed, /* complain_on_overflow */
1857 ppc64_elf_unhandled_reloc, /* special_function */
1858 "R_PPC64_GOT_DTPREL16_HI", /* name */
1859 FALSE, /* partial_inplace */
1860 0, /* src_mask */
1861 0xffff, /* dst_mask */
1862 FALSE), /* pcrel_offset */
1863
1864 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1865 HOWTO (R_PPC64_GOT_DTPREL16_HA,
1866 16, /* rightshift */
1867 1, /* size (0 = byte, 1 = short, 2 = long) */
1868 16, /* bitsize */
1869 FALSE, /* pc_relative */
1870 0, /* bitpos */
1871 complain_overflow_signed, /* complain_on_overflow */
1872 ppc64_elf_unhandled_reloc, /* special_function */
1873 "R_PPC64_GOT_DTPREL16_HA", /* name */
1874 FALSE, /* partial_inplace */
1875 0, /* src_mask */
1876 0xffff, /* dst_mask */
1877 FALSE), /* pcrel_offset */
1878
1879 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1880 offset to the entry relative to the TOC base (r2). */
1881 HOWTO (R_PPC64_GOT_TPREL16_DS,
1882 0, /* rightshift */
1883 1, /* size (0 = byte, 1 = short, 2 = long) */
1884 16, /* bitsize */
1885 FALSE, /* pc_relative */
1886 0, /* bitpos */
1887 complain_overflow_signed, /* complain_on_overflow */
1888 ppc64_elf_unhandled_reloc, /* special_function */
1889 "R_PPC64_GOT_TPREL16_DS", /* name */
1890 FALSE, /* partial_inplace */
1891 0, /* src_mask */
1892 0xfffc, /* dst_mask */
1893 FALSE), /* pcrel_offset */
1894
1895 /* Like GOT_TPREL16_DS, but no overflow. */
1896 HOWTO (R_PPC64_GOT_TPREL16_LO_DS,
1897 0, /* rightshift */
1898 1, /* size (0 = byte, 1 = short, 2 = long) */
1899 16, /* bitsize */
1900 FALSE, /* pc_relative */
1901 0, /* bitpos */
1902 complain_overflow_dont, /* complain_on_overflow */
1903 ppc64_elf_unhandled_reloc, /* special_function */
1904 "R_PPC64_GOT_TPREL16_LO_DS", /* name */
1905 FALSE, /* partial_inplace */
1906 0, /* src_mask */
1907 0xfffc, /* dst_mask */
1908 FALSE), /* pcrel_offset */
1909
1910 /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */
1911 HOWTO (R_PPC64_GOT_TPREL16_HI,
1912 16, /* rightshift */
1913 1, /* size (0 = byte, 1 = short, 2 = long) */
1914 16, /* bitsize */
1915 FALSE, /* pc_relative */
1916 0, /* bitpos */
1917 complain_overflow_signed, /* complain_on_overflow */
1918 ppc64_elf_unhandled_reloc, /* special_function */
1919 "R_PPC64_GOT_TPREL16_HI", /* name */
1920 FALSE, /* partial_inplace */
1921 0, /* src_mask */
1922 0xffff, /* dst_mask */
1923 FALSE), /* pcrel_offset */
1924
1925 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1926 HOWTO (R_PPC64_GOT_TPREL16_HA,
1927 16, /* rightshift */
1928 1, /* size (0 = byte, 1 = short, 2 = long) */
1929 16, /* bitsize */
1930 FALSE, /* pc_relative */
1931 0, /* bitpos */
1932 complain_overflow_signed, /* complain_on_overflow */
1933 ppc64_elf_unhandled_reloc, /* special_function */
1934 "R_PPC64_GOT_TPREL16_HA", /* name */
1935 FALSE, /* partial_inplace */
1936 0, /* src_mask */
1937 0xffff, /* dst_mask */
1938 FALSE), /* pcrel_offset */
1939
1940 HOWTO (R_PPC64_JMP_IREL, /* type */
1941 0, /* rightshift */
1942 0, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1943 0, /* bitsize */
1944 FALSE, /* pc_relative */
1945 0, /* bitpos */
1946 complain_overflow_dont, /* complain_on_overflow */
1947 ppc64_elf_unhandled_reloc, /* special_function */
1948 "R_PPC64_JMP_IREL", /* name */
1949 FALSE, /* partial_inplace */
1950 0, /* src_mask */
1951 0, /* dst_mask */
1952 FALSE), /* pcrel_offset */
1953
1954 HOWTO (R_PPC64_IRELATIVE, /* type */
1955 0, /* rightshift */
1956 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1957 64, /* bitsize */
1958 FALSE, /* pc_relative */
1959 0, /* bitpos */
1960 complain_overflow_dont, /* complain_on_overflow */
1961 bfd_elf_generic_reloc, /* special_function */
1962 "R_PPC64_IRELATIVE", /* name */
1963 FALSE, /* partial_inplace */
1964 0, /* src_mask */
1965 ONES (64), /* dst_mask */
1966 FALSE), /* pcrel_offset */
1967
1968 /* A 16 bit relative relocation. */
1969 HOWTO (R_PPC64_REL16, /* type */
1970 0, /* rightshift */
1971 1, /* size (0 = byte, 1 = short, 2 = long) */
1972 16, /* bitsize */
1973 TRUE, /* pc_relative */
1974 0, /* bitpos */
1975 complain_overflow_signed, /* complain_on_overflow */
1976 bfd_elf_generic_reloc, /* special_function */
1977 "R_PPC64_REL16", /* name */
1978 FALSE, /* partial_inplace */
1979 0, /* src_mask */
1980 0xffff, /* dst_mask */
1981 TRUE), /* pcrel_offset */
1982
1983 /* A 16 bit relative relocation without overflow. */
1984 HOWTO (R_PPC64_REL16_LO, /* type */
1985 0, /* rightshift */
1986 1, /* size (0 = byte, 1 = short, 2 = long) */
1987 16, /* bitsize */
1988 TRUE, /* pc_relative */
1989 0, /* bitpos */
1990 complain_overflow_dont,/* complain_on_overflow */
1991 bfd_elf_generic_reloc, /* special_function */
1992 "R_PPC64_REL16_LO", /* name */
1993 FALSE, /* partial_inplace */
1994 0, /* src_mask */
1995 0xffff, /* dst_mask */
1996 TRUE), /* pcrel_offset */
1997
1998 /* The high order 16 bits of a relative address. */
1999 HOWTO (R_PPC64_REL16_HI, /* type */
2000 16, /* rightshift */
2001 1, /* size (0 = byte, 1 = short, 2 = long) */
2002 16, /* bitsize */
2003 TRUE, /* pc_relative */
2004 0, /* bitpos */
2005 complain_overflow_signed, /* complain_on_overflow */
2006 bfd_elf_generic_reloc, /* special_function */
2007 "R_PPC64_REL16_HI", /* name */
2008 FALSE, /* partial_inplace */
2009 0, /* src_mask */
2010 0xffff, /* dst_mask */
2011 TRUE), /* pcrel_offset */
2012
2013 /* The high order 16 bits of a relative address, plus 1 if the contents of
2014 the low 16 bits, treated as a signed number, is negative. */
2015 HOWTO (R_PPC64_REL16_HA, /* type */
2016 16, /* rightshift */
2017 1, /* size (0 = byte, 1 = short, 2 = long) */
2018 16, /* bitsize */
2019 TRUE, /* pc_relative */
2020 0, /* bitpos */
2021 complain_overflow_signed, /* complain_on_overflow */
2022 ppc64_elf_ha_reloc, /* special_function */
2023 "R_PPC64_REL16_HA", /* name */
2024 FALSE, /* partial_inplace */
2025 0, /* src_mask */
2026 0xffff, /* dst_mask */
2027 TRUE), /* pcrel_offset */
2028
2029 /* Like R_PPC64_REL16_HA but for split field in addpcis. */
2030 HOWTO (R_PPC64_REL16DX_HA, /* type */
2031 16, /* rightshift */
2032 2, /* size (0 = byte, 1 = short, 2 = long) */
2033 16, /* bitsize */
2034 TRUE, /* pc_relative */
2035 0, /* bitpos */
2036 complain_overflow_signed, /* complain_on_overflow */
2037 ppc64_elf_ha_reloc, /* special_function */
2038 "R_PPC64_REL16DX_HA", /* name */
2039 FALSE, /* partial_inplace */
2040 0, /* src_mask */
2041 0x1fffc1, /* dst_mask */
2042 TRUE), /* pcrel_offset */
2043
2044 /* Like R_PPC64_ADDR16_HI, but no overflow. */
2045 HOWTO (R_PPC64_ADDR16_HIGH, /* type */
2046 16, /* rightshift */
2047 1, /* size (0 = byte, 1 = short, 2 = long) */
2048 16, /* bitsize */
2049 FALSE, /* pc_relative */
2050 0, /* bitpos */
2051 complain_overflow_dont, /* complain_on_overflow */
2052 bfd_elf_generic_reloc, /* special_function */
2053 "R_PPC64_ADDR16_HIGH", /* name */
2054 FALSE, /* partial_inplace */
2055 0, /* src_mask */
2056 0xffff, /* dst_mask */
2057 FALSE), /* pcrel_offset */
2058
2059 /* Like R_PPC64_ADDR16_HA, but no overflow. */
2060 HOWTO (R_PPC64_ADDR16_HIGHA, /* type */
2061 16, /* rightshift */
2062 1, /* size (0 = byte, 1 = short, 2 = long) */
2063 16, /* bitsize */
2064 FALSE, /* pc_relative */
2065 0, /* bitpos */
2066 complain_overflow_dont, /* complain_on_overflow */
2067 ppc64_elf_ha_reloc, /* special_function */
2068 "R_PPC64_ADDR16_HIGHA", /* name */
2069 FALSE, /* partial_inplace */
2070 0, /* src_mask */
2071 0xffff, /* dst_mask */
2072 FALSE), /* pcrel_offset */
2073
2074 /* Like R_PPC64_DTPREL16_HI, but no overflow. */
2075 HOWTO (R_PPC64_DTPREL16_HIGH,
2076 16, /* rightshift */
2077 1, /* size (0 = byte, 1 = short, 2 = long) */
2078 16, /* bitsize */
2079 FALSE, /* pc_relative */
2080 0, /* bitpos */
2081 complain_overflow_dont, /* complain_on_overflow */
2082 ppc64_elf_unhandled_reloc, /* special_function */
2083 "R_PPC64_DTPREL16_HIGH", /* name */
2084 FALSE, /* partial_inplace */
2085 0, /* src_mask */
2086 0xffff, /* dst_mask */
2087 FALSE), /* pcrel_offset */
2088
2089 /* Like R_PPC64_DTPREL16_HA, but no overflow. */
2090 HOWTO (R_PPC64_DTPREL16_HIGHA,
2091 16, /* rightshift */
2092 1, /* size (0 = byte, 1 = short, 2 = long) */
2093 16, /* bitsize */
2094 FALSE, /* pc_relative */
2095 0, /* bitpos */
2096 complain_overflow_dont, /* complain_on_overflow */
2097 ppc64_elf_unhandled_reloc, /* special_function */
2098 "R_PPC64_DTPREL16_HIGHA", /* name */
2099 FALSE, /* partial_inplace */
2100 0, /* src_mask */
2101 0xffff, /* dst_mask */
2102 FALSE), /* pcrel_offset */
2103
2104 /* Like R_PPC64_TPREL16_HI, but no overflow. */
2105 HOWTO (R_PPC64_TPREL16_HIGH,
2106 16, /* rightshift */
2107 1, /* size (0 = byte, 1 = short, 2 = long) */
2108 16, /* bitsize */
2109 FALSE, /* pc_relative */
2110 0, /* bitpos */
2111 complain_overflow_dont, /* complain_on_overflow */
2112 ppc64_elf_unhandled_reloc, /* special_function */
2113 "R_PPC64_TPREL16_HIGH", /* name */
2114 FALSE, /* partial_inplace */
2115 0, /* src_mask */
2116 0xffff, /* dst_mask */
2117 FALSE), /* pcrel_offset */
2118
2119 /* Like R_PPC64_TPREL16_HA, but no overflow. */
2120 HOWTO (R_PPC64_TPREL16_HIGHA,
2121 16, /* rightshift */
2122 1, /* size (0 = byte, 1 = short, 2 = long) */
2123 16, /* bitsize */
2124 FALSE, /* pc_relative */
2125 0, /* bitpos */
2126 complain_overflow_dont, /* complain_on_overflow */
2127 ppc64_elf_unhandled_reloc, /* special_function */
2128 "R_PPC64_TPREL16_HIGHA", /* name */
2129 FALSE, /* partial_inplace */
2130 0, /* src_mask */
2131 0xffff, /* dst_mask */
2132 FALSE), /* pcrel_offset */
2133
2134 /* Marker reloc on ELFv2 large-model function entry. */
2135 HOWTO (R_PPC64_ENTRY,
2136 0, /* rightshift */
2137 2, /* size (0 = byte, 1 = short, 2 = long) */
2138 32, /* bitsize */
2139 FALSE, /* pc_relative */
2140 0, /* bitpos */
2141 complain_overflow_dont, /* complain_on_overflow */
2142 bfd_elf_generic_reloc, /* special_function */
2143 "R_PPC64_ENTRY", /* name */
2144 FALSE, /* partial_inplace */
2145 0, /* src_mask */
2146 0, /* dst_mask */
2147 FALSE), /* pcrel_offset */
2148
2149 /* Like ADDR64, but use local entry point of function. */
2150 HOWTO (R_PPC64_ADDR64_LOCAL, /* type */
2151 0, /* rightshift */
2152 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
2153 64, /* bitsize */
2154 FALSE, /* pc_relative */
2155 0, /* bitpos */
2156 complain_overflow_dont, /* complain_on_overflow */
2157 bfd_elf_generic_reloc, /* special_function */
2158 "R_PPC64_ADDR64_LOCAL", /* name */
2159 FALSE, /* partial_inplace */
2160 0, /* src_mask */
2161 ONES (64), /* dst_mask */
2162 FALSE), /* pcrel_offset */
2163
2164 /* GNU extension to record C++ vtable hierarchy. */
2165 HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
2166 0, /* rightshift */
2167 0, /* size (0 = byte, 1 = short, 2 = long) */
2168 0, /* bitsize */
2169 FALSE, /* pc_relative */
2170 0, /* bitpos */
2171 complain_overflow_dont, /* complain_on_overflow */
2172 NULL, /* special_function */
2173 "R_PPC64_GNU_VTINHERIT", /* name */
2174 FALSE, /* partial_inplace */
2175 0, /* src_mask */
2176 0, /* dst_mask */
2177 FALSE), /* pcrel_offset */
2178
2179 /* GNU extension to record C++ vtable member usage. */
2180 HOWTO (R_PPC64_GNU_VTENTRY, /* type */
2181 0, /* rightshift */
2182 0, /* size (0 = byte, 1 = short, 2 = long) */
2183 0, /* bitsize */
2184 FALSE, /* pc_relative */
2185 0, /* bitpos */
2186 complain_overflow_dont, /* complain_on_overflow */
2187 NULL, /* special_function */
2188 "R_PPC64_GNU_VTENTRY", /* name */
2189 FALSE, /* partial_inplace */
2190 0, /* src_mask */
2191 0, /* dst_mask */
2192 FALSE), /* pcrel_offset */
2193 };
2194
2195 \f
2196 /* Initialize the ppc64_elf_howto_table, so that linear accesses can
2197 be done. */
2198
2199 static void
2200 ppc_howto_init (void)
2201 {
2202 unsigned int i, type;
2203
2204 for (i = 0; i < ARRAY_SIZE (ppc64_elf_howto_raw); i++)
2205 {
2206 type = ppc64_elf_howto_raw[i].type;
2207 BFD_ASSERT (type < ARRAY_SIZE (ppc64_elf_howto_table));
2208 ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
2209 }
2210 }
2211
2212 static reloc_howto_type *
2213 ppc64_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2214 bfd_reloc_code_real_type code)
2215 {
2216 enum elf_ppc64_reloc_type r = R_PPC64_NONE;
2217
2218 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2219 /* Initialize howto table if needed. */
2220 ppc_howto_init ();
2221
2222 switch (code)
2223 {
2224 default:
2225 return NULL;
2226
2227 case BFD_RELOC_NONE: r = R_PPC64_NONE;
2228 break;
2229 case BFD_RELOC_32: r = R_PPC64_ADDR32;
2230 break;
2231 case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24;
2232 break;
2233 case BFD_RELOC_16: r = R_PPC64_ADDR16;
2234 break;
2235 case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO;
2236 break;
2237 case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI;
2238 break;
2239 case BFD_RELOC_PPC64_ADDR16_HIGH: r = R_PPC64_ADDR16_HIGH;
2240 break;
2241 case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA;
2242 break;
2243 case BFD_RELOC_PPC64_ADDR16_HIGHA: r = R_PPC64_ADDR16_HIGHA;
2244 break;
2245 case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14;
2246 break;
2247 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN;
2248 break;
2249 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN;
2250 break;
2251 case BFD_RELOC_PPC_B26: r = R_PPC64_REL24;
2252 break;
2253 case BFD_RELOC_PPC_B16: r = R_PPC64_REL14;
2254 break;
2255 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN;
2256 break;
2257 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN;
2258 break;
2259 case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16;
2260 break;
2261 case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO;
2262 break;
2263 case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI;
2264 break;
2265 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA;
2266 break;
2267 case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY;
2268 break;
2269 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT;
2270 break;
2271 case BFD_RELOC_32_PCREL: r = R_PPC64_REL32;
2272 break;
2273 case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32;
2274 break;
2275 case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32;
2276 break;
2277 case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO;
2278 break;
2279 case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI;
2280 break;
2281 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA;
2282 break;
2283 case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF;
2284 break;
2285 case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO;
2286 break;
2287 case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI;
2288 break;
2289 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA;
2290 break;
2291 case BFD_RELOC_CTOR: r = R_PPC64_ADDR64;
2292 break;
2293 case BFD_RELOC_64: r = R_PPC64_ADDR64;
2294 break;
2295 case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER;
2296 break;
2297 case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA;
2298 break;
2299 case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST;
2300 break;
2301 case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA;
2302 break;
2303 case BFD_RELOC_64_PCREL: r = R_PPC64_REL64;
2304 break;
2305 case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64;
2306 break;
2307 case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64;
2308 break;
2309 case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16;
2310 break;
2311 case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO;
2312 break;
2313 case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI;
2314 break;
2315 case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA;
2316 break;
2317 case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC;
2318 break;
2319 case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16;
2320 break;
2321 case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO;
2322 break;
2323 case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI;
2324 break;
2325 case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA;
2326 break;
2327 case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS;
2328 break;
2329 case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS;
2330 break;
2331 case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS;
2332 break;
2333 case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS;
2334 break;
2335 case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS;
2336 break;
2337 case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS;
2338 break;
2339 case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS;
2340 break;
2341 case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS;
2342 break;
2343 case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS;
2344 break;
2345 case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS;
2346 break;
2347 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS;
2348 break;
2349 case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS;
2350 break;
2351 case BFD_RELOC_PPC_TLSGD: r = R_PPC64_TLSGD;
2352 break;
2353 case BFD_RELOC_PPC_TLSLD: r = R_PPC64_TLSLD;
2354 break;
2355 case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64;
2356 break;
2357 case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16;
2358 break;
2359 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO;
2360 break;
2361 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI;
2362 break;
2363 case BFD_RELOC_PPC64_TPREL16_HIGH: r = R_PPC64_TPREL16_HIGH;
2364 break;
2365 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA;
2366 break;
2367 case BFD_RELOC_PPC64_TPREL16_HIGHA: r = R_PPC64_TPREL16_HIGHA;
2368 break;
2369 case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64;
2370 break;
2371 case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16;
2372 break;
2373 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO;
2374 break;
2375 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI;
2376 break;
2377 case BFD_RELOC_PPC64_DTPREL16_HIGH: r = R_PPC64_DTPREL16_HIGH;
2378 break;
2379 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA;
2380 break;
2381 case BFD_RELOC_PPC64_DTPREL16_HIGHA: r = R_PPC64_DTPREL16_HIGHA;
2382 break;
2383 case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64;
2384 break;
2385 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16;
2386 break;
2387 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO;
2388 break;
2389 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI;
2390 break;
2391 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA;
2392 break;
2393 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16;
2394 break;
2395 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO;
2396 break;
2397 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI;
2398 break;
2399 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA;
2400 break;
2401 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS;
2402 break;
2403 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS;
2404 break;
2405 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI;
2406 break;
2407 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA;
2408 break;
2409 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS;
2410 break;
2411 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS;
2412 break;
2413 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI;
2414 break;
2415 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA;
2416 break;
2417 case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS;
2418 break;
2419 case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS;
2420 break;
2421 case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER;
2422 break;
2423 case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA;
2424 break;
2425 case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST;
2426 break;
2427 case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA;
2428 break;
2429 case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS;
2430 break;
2431 case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS;
2432 break;
2433 case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER;
2434 break;
2435 case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA;
2436 break;
2437 case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST;
2438 break;
2439 case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA;
2440 break;
2441 case BFD_RELOC_16_PCREL: r = R_PPC64_REL16;
2442 break;
2443 case BFD_RELOC_LO16_PCREL: r = R_PPC64_REL16_LO;
2444 break;
2445 case BFD_RELOC_HI16_PCREL: r = R_PPC64_REL16_HI;
2446 break;
2447 case BFD_RELOC_HI16_S_PCREL: r = R_PPC64_REL16_HA;
2448 break;
2449 case BFD_RELOC_PPC_REL16DX_HA: r = R_PPC64_REL16DX_HA;
2450 break;
2451 case BFD_RELOC_PPC64_ENTRY: r = R_PPC64_ENTRY;
2452 break;
2453 case BFD_RELOC_PPC64_ADDR64_LOCAL: r = R_PPC64_ADDR64_LOCAL;
2454 break;
2455 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT;
2456 break;
2457 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY;
2458 break;
2459 }
2460
2461 return ppc64_elf_howto_table[r];
2462 };
2463
2464 static reloc_howto_type *
2465 ppc64_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2466 const char *r_name)
2467 {
2468 unsigned int i;
2469
2470 for (i = 0; i < ARRAY_SIZE (ppc64_elf_howto_raw); i++)
2471 if (ppc64_elf_howto_raw[i].name != NULL
2472 && strcasecmp (ppc64_elf_howto_raw[i].name, r_name) == 0)
2473 return &ppc64_elf_howto_raw[i];
2474
2475 return NULL;
2476 }
2477
2478 /* Set the howto pointer for a PowerPC ELF reloc. */
2479
2480 static void
2481 ppc64_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
2482 Elf_Internal_Rela *dst)
2483 {
2484 unsigned int type;
2485
2486 /* Initialize howto table if needed. */
2487 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2488 ppc_howto_init ();
2489
2490 type = ELF64_R_TYPE (dst->r_info);
2491 if (type >= ARRAY_SIZE (ppc64_elf_howto_table))
2492 {
2493 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
2494 abfd, (int) type);
2495 type = R_PPC64_NONE;
2496 }
2497 cache_ptr->howto = ppc64_elf_howto_table[type];
2498 }
2499
2500 /* Handle the R_PPC64_ADDR16_HA and similar relocs. */
2501
2502 static bfd_reloc_status_type
2503 ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2504 void *data, asection *input_section,
2505 bfd *output_bfd, char **error_message)
2506 {
2507 enum elf_ppc64_reloc_type r_type;
2508 long insn;
2509 bfd_size_type octets;
2510 bfd_vma value;
2511
2512 /* If this is a relocatable link (output_bfd test tells us), just
2513 call the generic function. Any adjustment will be done at final
2514 link time. */
2515 if (output_bfd != NULL)
2516 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2517 input_section, output_bfd, error_message);
2518
2519 /* Adjust the addend for sign extension of the low 16 bits.
2520 We won't actually be using the low 16 bits, so trashing them
2521 doesn't matter. */
2522 reloc_entry->addend += 0x8000;
2523 r_type = reloc_entry->howto->type;
2524 if (r_type != R_PPC64_REL16DX_HA)
2525 return bfd_reloc_continue;
2526
2527 value = 0;
2528 if (!bfd_is_com_section (symbol->section))
2529 value = symbol->value;
2530 value += (reloc_entry->addend
2531 + symbol->section->output_offset
2532 + symbol->section->output_section->vma);
2533 value -= (reloc_entry->address
2534 + input_section->output_offset
2535 + input_section->output_section->vma);
2536 value = (bfd_signed_vma) value >> 16;
2537
2538 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2539 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2540 insn &= ~0x1fffc1;
2541 insn |= (value & 0xffc1) | ((value & 0x3e) << 15);
2542 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2543 if (value + 0x8000 > 0xffff)
2544 return bfd_reloc_overflow;
2545 return bfd_reloc_ok;
2546 }
2547
2548 static bfd_reloc_status_type
2549 ppc64_elf_branch_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2550 void *data, asection *input_section,
2551 bfd *output_bfd, char **error_message)
2552 {
2553 if (output_bfd != NULL)
2554 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2555 input_section, output_bfd, error_message);
2556
2557 if (strcmp (symbol->section->name, ".opd") == 0
2558 && (symbol->section->owner->flags & DYNAMIC) == 0)
2559 {
2560 bfd_vma dest = opd_entry_value (symbol->section,
2561 symbol->value + reloc_entry->addend,
2562 NULL, NULL, FALSE);
2563 if (dest != (bfd_vma) -1)
2564 reloc_entry->addend = dest - (symbol->value
2565 + symbol->section->output_section->vma
2566 + symbol->section->output_offset);
2567 }
2568 else
2569 {
2570 elf_symbol_type *elfsym = (elf_symbol_type *) symbol;
2571
2572 if (symbol->section->owner != abfd
2573 && abiversion (symbol->section->owner) >= 2)
2574 {
2575 unsigned int i;
2576
2577 for (i = 0; i < symbol->section->owner->symcount; ++i)
2578 {
2579 asymbol *symdef = symbol->section->owner->outsymbols[i];
2580
2581 if (strcmp (symdef->name, symbol->name) == 0)
2582 {
2583 elfsym = (elf_symbol_type *) symdef;
2584 break;
2585 }
2586 }
2587 }
2588 reloc_entry->addend
2589 += PPC64_LOCAL_ENTRY_OFFSET (elfsym->internal_elf_sym.st_other);
2590 }
2591 return bfd_reloc_continue;
2592 }
2593
2594 static bfd_reloc_status_type
2595 ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2596 void *data, asection *input_section,
2597 bfd *output_bfd, char **error_message)
2598 {
2599 long insn;
2600 enum elf_ppc64_reloc_type r_type;
2601 bfd_size_type octets;
2602 /* Assume 'at' branch hints. */
2603 bfd_boolean is_isa_v2 = TRUE;
2604
2605 /* If this is a relocatable link (output_bfd test tells us), just
2606 call the generic function. Any adjustment will be done at final
2607 link time. */
2608 if (output_bfd != NULL)
2609 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2610 input_section, output_bfd, error_message);
2611
2612 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2613 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2614 insn &= ~(0x01 << 21);
2615 r_type = reloc_entry->howto->type;
2616 if (r_type == R_PPC64_ADDR14_BRTAKEN
2617 || r_type == R_PPC64_REL14_BRTAKEN)
2618 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
2619
2620 if (is_isa_v2)
2621 {
2622 /* Set 'a' bit. This is 0b00010 in BO field for branch
2623 on CR(BI) insns (BO == 001at or 011at), and 0b01000
2624 for branch on CTR insns (BO == 1a00t or 1a01t). */
2625 if ((insn & (0x14 << 21)) == (0x04 << 21))
2626 insn |= 0x02 << 21;
2627 else if ((insn & (0x14 << 21)) == (0x10 << 21))
2628 insn |= 0x08 << 21;
2629 else
2630 goto out;
2631 }
2632 else
2633 {
2634 bfd_vma target = 0;
2635 bfd_vma from;
2636
2637 if (!bfd_is_com_section (symbol->section))
2638 target = symbol->value;
2639 target += symbol->section->output_section->vma;
2640 target += symbol->section->output_offset;
2641 target += reloc_entry->addend;
2642
2643 from = (reloc_entry->address
2644 + input_section->output_offset
2645 + input_section->output_section->vma);
2646
2647 /* Invert 'y' bit if not the default. */
2648 if ((bfd_signed_vma) (target - from) < 0)
2649 insn ^= 0x01 << 21;
2650 }
2651 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2652 out:
2653 return ppc64_elf_branch_reloc (abfd, reloc_entry, symbol, data,
2654 input_section, output_bfd, error_message);
2655 }
2656
2657 static bfd_reloc_status_type
2658 ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2659 void *data, asection *input_section,
2660 bfd *output_bfd, char **error_message)
2661 {
2662 /* If this is a relocatable link (output_bfd test tells us), just
2663 call the generic function. Any adjustment will be done at final
2664 link time. */
2665 if (output_bfd != NULL)
2666 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2667 input_section, output_bfd, error_message);
2668
2669 /* Subtract the symbol section base address. */
2670 reloc_entry->addend -= symbol->section->output_section->vma;
2671 return bfd_reloc_continue;
2672 }
2673
2674 static bfd_reloc_status_type
2675 ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2676 void *data, asection *input_section,
2677 bfd *output_bfd, char **error_message)
2678 {
2679 /* If this is a relocatable link (output_bfd test tells us), just
2680 call the generic function. Any adjustment will be done at final
2681 link time. */
2682 if (output_bfd != NULL)
2683 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2684 input_section, output_bfd, error_message);
2685
2686 /* Subtract the symbol section base address. */
2687 reloc_entry->addend -= symbol->section->output_section->vma;
2688
2689 /* Adjust the addend for sign extension of the low 16 bits. */
2690 reloc_entry->addend += 0x8000;
2691 return bfd_reloc_continue;
2692 }
2693
2694 static bfd_reloc_status_type
2695 ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2696 void *data, asection *input_section,
2697 bfd *output_bfd, char **error_message)
2698 {
2699 bfd_vma TOCstart;
2700
2701 /* If this is a relocatable link (output_bfd test tells us), just
2702 call the generic function. Any adjustment will be done at final
2703 link time. */
2704 if (output_bfd != NULL)
2705 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2706 input_section, output_bfd, error_message);
2707
2708 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2709 if (TOCstart == 0)
2710 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2711
2712 /* Subtract the TOC base address. */
2713 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2714 return bfd_reloc_continue;
2715 }
2716
2717 static bfd_reloc_status_type
2718 ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2719 void *data, asection *input_section,
2720 bfd *output_bfd, char **error_message)
2721 {
2722 bfd_vma TOCstart;
2723
2724 /* If this is a relocatable link (output_bfd test tells us), just
2725 call the generic function. Any adjustment will be done at final
2726 link time. */
2727 if (output_bfd != NULL)
2728 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2729 input_section, output_bfd, error_message);
2730
2731 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2732 if (TOCstart == 0)
2733 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2734
2735 /* Subtract the TOC base address. */
2736 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2737
2738 /* Adjust the addend for sign extension of the low 16 bits. */
2739 reloc_entry->addend += 0x8000;
2740 return bfd_reloc_continue;
2741 }
2742
2743 static bfd_reloc_status_type
2744 ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2745 void *data, asection *input_section,
2746 bfd *output_bfd, char **error_message)
2747 {
2748 bfd_vma TOCstart;
2749 bfd_size_type octets;
2750
2751 /* If this is a relocatable link (output_bfd test tells us), just
2752 call the generic function. Any adjustment will be done at final
2753 link time. */
2754 if (output_bfd != NULL)
2755 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2756 input_section, output_bfd, error_message);
2757
2758 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2759 if (TOCstart == 0)
2760 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2761
2762 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2763 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
2764 return bfd_reloc_ok;
2765 }
2766
2767 static bfd_reloc_status_type
2768 ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2769 void *data, asection *input_section,
2770 bfd *output_bfd, char **error_message)
2771 {
2772 /* If this is a relocatable link (output_bfd test tells us), just
2773 call the generic function. Any adjustment will be done at final
2774 link time. */
2775 if (output_bfd != NULL)
2776 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2777 input_section, output_bfd, error_message);
2778
2779 if (error_message != NULL)
2780 {
2781 static char buf[60];
2782 sprintf (buf, "generic linker can't handle %s",
2783 reloc_entry->howto->name);
2784 *error_message = buf;
2785 }
2786 return bfd_reloc_dangerous;
2787 }
2788
2789 /* Track GOT entries needed for a given symbol. We might need more
2790 than one got entry per symbol. */
2791 struct got_entry
2792 {
2793 struct got_entry *next;
2794
2795 /* The symbol addend that we'll be placing in the GOT. */
2796 bfd_vma addend;
2797
2798 /* Unlike other ELF targets, we use separate GOT entries for the same
2799 symbol referenced from different input files. This is to support
2800 automatic multiple TOC/GOT sections, where the TOC base can vary
2801 from one input file to another. After partitioning into TOC groups
2802 we merge entries within the group.
2803
2804 Point to the BFD owning this GOT entry. */
2805 bfd *owner;
2806
2807 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
2808 TLS_TPREL or TLS_DTPREL for tls entries. */
2809 unsigned char tls_type;
2810
2811 /* Non-zero if got.ent points to real entry. */
2812 unsigned char is_indirect;
2813
2814 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
2815 union
2816 {
2817 bfd_signed_vma refcount;
2818 bfd_vma offset;
2819 struct got_entry *ent;
2820 } got;
2821 };
2822
2823 /* The same for PLT. */
2824 struct plt_entry
2825 {
2826 struct plt_entry *next;
2827
2828 bfd_vma addend;
2829
2830 union
2831 {
2832 bfd_signed_vma refcount;
2833 bfd_vma offset;
2834 } plt;
2835 };
2836
2837 struct ppc64_elf_obj_tdata
2838 {
2839 struct elf_obj_tdata elf;
2840
2841 /* Shortcuts to dynamic linker sections. */
2842 asection *got;
2843 asection *relgot;
2844
2845 /* Used during garbage collection. We attach global symbols defined
2846 on removed .opd entries to this section so that the sym is removed. */
2847 asection *deleted_section;
2848
2849 /* TLS local dynamic got entry handling. Support for multiple GOT
2850 sections means we potentially need one of these for each input bfd. */
2851 struct got_entry tlsld_got;
2852
2853 union {
2854 /* A copy of relocs before they are modified for --emit-relocs. */
2855 Elf_Internal_Rela *relocs;
2856
2857 /* Section contents. */
2858 bfd_byte *contents;
2859 } opd;
2860
2861 /* Nonzero if this bfd has small toc/got relocs, ie. that expect
2862 the reloc to be in the range -32768 to 32767. */
2863 unsigned int has_small_toc_reloc : 1;
2864
2865 /* Set if toc/got ha relocs detected not using r2, or lo reloc
2866 instruction not one we handle. */
2867 unsigned int unexpected_toc_insn : 1;
2868 };
2869
2870 #define ppc64_elf_tdata(bfd) \
2871 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
2872
2873 #define ppc64_tlsld_got(bfd) \
2874 (&ppc64_elf_tdata (bfd)->tlsld_got)
2875
2876 #define is_ppc64_elf(bfd) \
2877 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2878 && elf_object_id (bfd) == PPC64_ELF_DATA)
2879
2880 /* Override the generic function because we store some extras. */
2881
2882 static bfd_boolean
2883 ppc64_elf_mkobject (bfd *abfd)
2884 {
2885 return bfd_elf_allocate_object (abfd, sizeof (struct ppc64_elf_obj_tdata),
2886 PPC64_ELF_DATA);
2887 }
2888
2889 /* Fix bad default arch selected for a 64 bit input bfd when the
2890 default is 32 bit. */
2891
2892 static bfd_boolean
2893 ppc64_elf_object_p (bfd *abfd)
2894 {
2895 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 32)
2896 {
2897 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2898
2899 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2900 {
2901 /* Relies on arch after 32 bit default being 64 bit default. */
2902 abfd->arch_info = abfd->arch_info->next;
2903 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2904 }
2905 }
2906 return TRUE;
2907 }
2908
2909 /* Support for core dump NOTE sections. */
2910
2911 static bfd_boolean
2912 ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2913 {
2914 size_t offset, size;
2915
2916 if (note->descsz != 504)
2917 return FALSE;
2918
2919 /* pr_cursig */
2920 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
2921
2922 /* pr_pid */
2923 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 32);
2924
2925 /* pr_reg */
2926 offset = 112;
2927 size = 384;
2928
2929 /* Make a ".reg/999" section. */
2930 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2931 size, note->descpos + offset);
2932 }
2933
2934 static bfd_boolean
2935 ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2936 {
2937 if (note->descsz != 136)
2938 return FALSE;
2939
2940 elf_tdata (abfd)->core->pid
2941 = bfd_get_32 (abfd, note->descdata + 24);
2942 elf_tdata (abfd)->core->program
2943 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
2944 elf_tdata (abfd)->core->command
2945 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
2946
2947 return TRUE;
2948 }
2949
2950 static char *
2951 ppc64_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type,
2952 ...)
2953 {
2954 switch (note_type)
2955 {
2956 default:
2957 return NULL;
2958
2959 case NT_PRPSINFO:
2960 {
2961 char data[136];
2962 va_list ap;
2963
2964 va_start (ap, note_type);
2965 memset (data, 0, sizeof (data));
2966 strncpy (data + 40, va_arg (ap, const char *), 16);
2967 strncpy (data + 56, va_arg (ap, const char *), 80);
2968 va_end (ap);
2969 return elfcore_write_note (abfd, buf, bufsiz,
2970 "CORE", note_type, data, sizeof (data));
2971 }
2972
2973 case NT_PRSTATUS:
2974 {
2975 char data[504];
2976 va_list ap;
2977 long pid;
2978 int cursig;
2979 const void *greg;
2980
2981 va_start (ap, note_type);
2982 memset (data, 0, 112);
2983 pid = va_arg (ap, long);
2984 bfd_put_32 (abfd, pid, data + 32);
2985 cursig = va_arg (ap, int);
2986 bfd_put_16 (abfd, cursig, data + 12);
2987 greg = va_arg (ap, const void *);
2988 memcpy (data + 112, greg, 384);
2989 memset (data + 496, 0, 8);
2990 va_end (ap);
2991 return elfcore_write_note (abfd, buf, bufsiz,
2992 "CORE", note_type, data, sizeof (data));
2993 }
2994 }
2995 }
2996
2997 /* Add extra PPC sections. */
2998
2999 static const struct bfd_elf_special_section ppc64_elf_special_sections[]=
3000 {
3001 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, 0 },
3002 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
3003 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
3004 { STRING_COMMA_LEN (".toc"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
3005 { STRING_COMMA_LEN (".toc1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
3006 { STRING_COMMA_LEN (".tocbss"), 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
3007 { NULL, 0, 0, 0, 0 }
3008 };
3009
3010 enum _ppc64_sec_type {
3011 sec_normal = 0,
3012 sec_opd = 1,
3013 sec_toc = 2
3014 };
3015
3016 struct _ppc64_elf_section_data
3017 {
3018 struct bfd_elf_section_data elf;
3019
3020 union
3021 {
3022 /* An array with one entry for each opd function descriptor,
3023 and some spares since opd entries may be either 16 or 24 bytes. */
3024 #define OPD_NDX(OFF) ((OFF) >> 4)
3025 struct _opd_sec_data
3026 {
3027 /* Points to the function code section for local opd entries. */
3028 asection **func_sec;
3029
3030 /* After editing .opd, adjust references to opd local syms. */
3031 long *adjust;
3032 } opd;
3033
3034 /* An array for toc sections, indexed by offset/8. */
3035 struct _toc_sec_data
3036 {
3037 /* Specifies the relocation symbol index used at a given toc offset. */
3038 unsigned *symndx;
3039
3040 /* And the relocation addend. */
3041 bfd_vma *add;
3042 } toc;
3043 } u;
3044
3045 enum _ppc64_sec_type sec_type:2;
3046
3047 /* Flag set when small branches are detected. Used to
3048 select suitable defaults for the stub group size. */
3049 unsigned int has_14bit_branch:1;
3050 };
3051
3052 #define ppc64_elf_section_data(sec) \
3053 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
3054
3055 static bfd_boolean
3056 ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
3057 {
3058 if (!sec->used_by_bfd)
3059 {
3060 struct _ppc64_elf_section_data *sdata;
3061 bfd_size_type amt = sizeof (*sdata);
3062
3063 sdata = bfd_zalloc (abfd, amt);
3064 if (sdata == NULL)
3065 return FALSE;
3066 sec->used_by_bfd = sdata;
3067 }
3068
3069 return _bfd_elf_new_section_hook (abfd, sec);
3070 }
3071
3072 static struct _opd_sec_data *
3073 get_opd_info (asection * sec)
3074 {
3075 if (sec != NULL
3076 && ppc64_elf_section_data (sec) != NULL
3077 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
3078 return &ppc64_elf_section_data (sec)->u.opd;
3079 return NULL;
3080 }
3081 \f
3082 /* Parameters for the qsort hook. */
3083 static bfd_boolean synthetic_relocatable;
3084
3085 /* qsort comparison function for ppc64_elf_get_synthetic_symtab. */
3086
3087 static int
3088 compare_symbols (const void *ap, const void *bp)
3089 {
3090 const asymbol *a = * (const asymbol **) ap;
3091 const asymbol *b = * (const asymbol **) bp;
3092
3093 /* Section symbols first. */
3094 if ((a->flags & BSF_SECTION_SYM) && !(b->flags & BSF_SECTION_SYM))
3095 return -1;
3096 if (!(a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM))
3097 return 1;
3098
3099 /* then .opd symbols. */
3100 if (strcmp (a->section->name, ".opd") == 0
3101 && strcmp (b->section->name, ".opd") != 0)
3102 return -1;
3103 if (strcmp (a->section->name, ".opd") != 0
3104 && strcmp (b->section->name, ".opd") == 0)
3105 return 1;
3106
3107 /* then other code symbols. */
3108 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3109 == (SEC_CODE | SEC_ALLOC)
3110 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3111 != (SEC_CODE | SEC_ALLOC))
3112 return -1;
3113
3114 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3115 != (SEC_CODE | SEC_ALLOC)
3116 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3117 == (SEC_CODE | SEC_ALLOC))
3118 return 1;
3119
3120 if (synthetic_relocatable)
3121 {
3122 if (a->section->id < b->section->id)
3123 return -1;
3124
3125 if (a->section->id > b->section->id)
3126 return 1;
3127 }
3128
3129 if (a->value + a->section->vma < b->value + b->section->vma)
3130 return -1;
3131
3132 if (a->value + a->section->vma > b->value + b->section->vma)
3133 return 1;
3134
3135 /* For syms with the same value, prefer strong dynamic global function
3136 syms over other syms. */
3137 if ((a->flags & BSF_GLOBAL) != 0 && (b->flags & BSF_GLOBAL) == 0)
3138 return -1;
3139
3140 if ((a->flags & BSF_GLOBAL) == 0 && (b->flags & BSF_GLOBAL) != 0)
3141 return 1;
3142
3143 if ((a->flags & BSF_FUNCTION) != 0 && (b->flags & BSF_FUNCTION) == 0)
3144 return -1;
3145
3146 if ((a->flags & BSF_FUNCTION) == 0 && (b->flags & BSF_FUNCTION) != 0)
3147 return 1;
3148
3149 if ((a->flags & BSF_WEAK) == 0 && (b->flags & BSF_WEAK) != 0)
3150 return -1;
3151
3152 if ((a->flags & BSF_WEAK) != 0 && (b->flags & BSF_WEAK) == 0)
3153 return 1;
3154
3155 if ((a->flags & BSF_DYNAMIC) != 0 && (b->flags & BSF_DYNAMIC) == 0)
3156 return -1;
3157
3158 if ((a->flags & BSF_DYNAMIC) == 0 && (b->flags & BSF_DYNAMIC) != 0)
3159 return 1;
3160
3161 return 0;
3162 }
3163
3164 /* Search SYMS for a symbol of the given VALUE. */
3165
3166 static asymbol *
3167 sym_exists_at (asymbol **syms, long lo, long hi, unsigned int id, bfd_vma value)
3168 {
3169 long mid;
3170
3171 if (id == (unsigned) -1)
3172 {
3173 while (lo < hi)
3174 {
3175 mid = (lo + hi) >> 1;
3176 if (syms[mid]->value + syms[mid]->section->vma < value)
3177 lo = mid + 1;
3178 else if (syms[mid]->value + syms[mid]->section->vma > value)
3179 hi = mid;
3180 else
3181 return syms[mid];
3182 }
3183 }
3184 else
3185 {
3186 while (lo < hi)
3187 {
3188 mid = (lo + hi) >> 1;
3189 if (syms[mid]->section->id < id)
3190 lo = mid + 1;
3191 else if (syms[mid]->section->id > id)
3192 hi = mid;
3193 else if (syms[mid]->value < value)
3194 lo = mid + 1;
3195 else if (syms[mid]->value > value)
3196 hi = mid;
3197 else
3198 return syms[mid];
3199 }
3200 }
3201 return NULL;
3202 }
3203
3204 static bfd_boolean
3205 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
3206 {
3207 bfd_vma vma = *(bfd_vma *) ptr;
3208 return ((section->flags & SEC_ALLOC) != 0
3209 && section->vma <= vma
3210 && vma < section->vma + section->size);
3211 }
3212
3213 /* Create synthetic symbols, effectively restoring "dot-symbol" function
3214 entry syms. Also generate @plt symbols for the glink branch table.
3215 Returns count of synthetic symbols in RET or -1 on error. */
3216
3217 static long
3218 ppc64_elf_get_synthetic_symtab (bfd *abfd,
3219 long static_count, asymbol **static_syms,
3220 long dyn_count, asymbol **dyn_syms,
3221 asymbol **ret)
3222 {
3223 asymbol *s;
3224 long i;
3225 long count;
3226 char *names;
3227 long symcount, codesecsym, codesecsymend, secsymend, opdsymend;
3228 asection *opd = NULL;
3229 bfd_boolean relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0;
3230 asymbol **syms;
3231 int abi = abiversion (abfd);
3232
3233 *ret = NULL;
3234
3235 if (abi < 2)
3236 {
3237 opd = bfd_get_section_by_name (abfd, ".opd");
3238 if (opd == NULL && abi == 1)
3239 return 0;
3240 }
3241
3242 symcount = static_count;
3243 if (!relocatable)
3244 symcount += dyn_count;
3245 if (symcount == 0)
3246 return 0;
3247
3248 syms = bfd_malloc ((symcount + 1) * sizeof (*syms));
3249 if (syms == NULL)
3250 return -1;
3251
3252 if (!relocatable && static_count != 0 && dyn_count != 0)
3253 {
3254 /* Use both symbol tables. */
3255 memcpy (syms, static_syms, static_count * sizeof (*syms));
3256 memcpy (syms + static_count, dyn_syms, (dyn_count + 1) * sizeof (*syms));
3257 }
3258 else if (!relocatable && static_count == 0)
3259 memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms));
3260 else
3261 memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms));
3262
3263 synthetic_relocatable = relocatable;
3264 qsort (syms, symcount, sizeof (*syms), compare_symbols);
3265
3266 if (!relocatable && symcount > 1)
3267 {
3268 long j;
3269 /* Trim duplicate syms, since we may have merged the normal and
3270 dynamic symbols. Actually, we only care about syms that have
3271 different values, so trim any with the same value. */
3272 for (i = 1, j = 1; i < symcount; ++i)
3273 if (syms[i - 1]->value + syms[i - 1]->section->vma
3274 != syms[i]->value + syms[i]->section->vma)
3275 syms[j++] = syms[i];
3276 symcount = j;
3277 }
3278
3279 i = 0;
3280 if (strcmp (syms[i]->section->name, ".opd") == 0)
3281 ++i;
3282 codesecsym = i;
3283
3284 for (; i < symcount; ++i)
3285 if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3286 != (SEC_CODE | SEC_ALLOC))
3287 || (syms[i]->flags & BSF_SECTION_SYM) == 0)
3288 break;
3289 codesecsymend = i;
3290
3291 for (; i < symcount; ++i)
3292 if ((syms[i]->flags & BSF_SECTION_SYM) == 0)
3293 break;
3294 secsymend = i;
3295
3296 for (; i < symcount; ++i)
3297 if (strcmp (syms[i]->section->name, ".opd") != 0)
3298 break;
3299 opdsymend = i;
3300
3301 for (; i < symcount; ++i)
3302 if ((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3303 != (SEC_CODE | SEC_ALLOC))
3304 break;
3305 symcount = i;
3306
3307 count = 0;
3308
3309 if (relocatable)
3310 {
3311 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3312 arelent *r;
3313 size_t size;
3314 long relcount;
3315
3316 if (opdsymend == secsymend)
3317 goto done;
3318
3319 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3320 relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0;
3321 if (relcount == 0)
3322 goto done;
3323
3324 if (!(*slurp_relocs) (abfd, opd, static_syms, FALSE))
3325 {
3326 count = -1;
3327 goto done;
3328 }
3329
3330 size = 0;
3331 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3332 {
3333 asymbol *sym;
3334
3335 while (r < opd->relocation + relcount
3336 && r->address < syms[i]->value + opd->vma)
3337 ++r;
3338
3339 if (r == opd->relocation + relcount)
3340 break;
3341
3342 if (r->address != syms[i]->value + opd->vma)
3343 continue;
3344
3345 if (r->howto->type != R_PPC64_ADDR64)
3346 continue;
3347
3348 sym = *r->sym_ptr_ptr;
3349 if (!sym_exists_at (syms, opdsymend, symcount,
3350 sym->section->id, sym->value + r->addend))
3351 {
3352 ++count;
3353 size += sizeof (asymbol);
3354 size += strlen (syms[i]->name) + 2;
3355 }
3356 }
3357
3358 if (size == 0)
3359 goto done;
3360 s = *ret = bfd_malloc (size);
3361 if (s == NULL)
3362 {
3363 count = -1;
3364 goto done;
3365 }
3366
3367 names = (char *) (s + count);
3368
3369 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3370 {
3371 asymbol *sym;
3372
3373 while (r < opd->relocation + relcount
3374 && r->address < syms[i]->value + opd->vma)
3375 ++r;
3376
3377 if (r == opd->relocation + relcount)
3378 break;
3379
3380 if (r->address != syms[i]->value + opd->vma)
3381 continue;
3382
3383 if (r->howto->type != R_PPC64_ADDR64)
3384 continue;
3385
3386 sym = *r->sym_ptr_ptr;
3387 if (!sym_exists_at (syms, opdsymend, symcount,
3388 sym->section->id, sym->value + r->addend))
3389 {
3390 size_t len;
3391
3392 *s = *syms[i];
3393 s->flags |= BSF_SYNTHETIC;
3394 s->section = sym->section;
3395 s->value = sym->value + r->addend;
3396 s->name = names;
3397 *names++ = '.';
3398 len = strlen (syms[i]->name);
3399 memcpy (names, syms[i]->name, len + 1);
3400 names += len + 1;
3401 /* Have udata.p point back to the original symbol this
3402 synthetic symbol was derived from. */
3403 s->udata.p = syms[i];
3404 s++;
3405 }
3406 }
3407 }
3408 else
3409 {
3410 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3411 bfd_byte *contents = NULL;
3412 size_t size;
3413 long plt_count = 0;
3414 bfd_vma glink_vma = 0, resolv_vma = 0;
3415 asection *dynamic, *glink = NULL, *relplt = NULL;
3416 arelent *p;
3417
3418 if (opd != NULL && !bfd_malloc_and_get_section (abfd, opd, &contents))
3419 {
3420 free_contents_and_exit_err:
3421 count = -1;
3422 free_contents_and_exit:
3423 if (contents)
3424 free (contents);
3425 goto done;
3426 }
3427
3428 size = 0;
3429 for (i = secsymend; i < opdsymend; ++i)
3430 {
3431 bfd_vma ent;
3432
3433 /* Ignore bogus symbols. */
3434 if (syms[i]->value > opd->size - 8)
3435 continue;
3436
3437 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3438 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3439 {
3440 ++count;
3441 size += sizeof (asymbol);
3442 size += strlen (syms[i]->name) + 2;
3443 }
3444 }
3445
3446 /* Get start of .glink stubs from DT_PPC64_GLINK. */
3447 if (dyn_count != 0
3448 && (dynamic = bfd_get_section_by_name (abfd, ".dynamic")) != NULL)
3449 {
3450 bfd_byte *dynbuf, *extdyn, *extdynend;
3451 size_t extdynsize;
3452 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
3453
3454 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
3455 goto free_contents_and_exit_err;
3456
3457 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
3458 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
3459
3460 extdyn = dynbuf;
3461 extdynend = extdyn + dynamic->size;
3462 for (; extdyn < extdynend; extdyn += extdynsize)
3463 {
3464 Elf_Internal_Dyn dyn;
3465 (*swap_dyn_in) (abfd, extdyn, &dyn);
3466
3467 if (dyn.d_tag == DT_NULL)
3468 break;
3469
3470 if (dyn.d_tag == DT_PPC64_GLINK)
3471 {
3472 /* The first glink stub starts at offset 32; see
3473 comment in ppc64_elf_finish_dynamic_sections. */
3474 glink_vma = dyn.d_un.d_val + GLINK_CALL_STUB_SIZE - 8 * 4;
3475 /* The .glink section usually does not survive the final
3476 link; search for the section (usually .text) where the
3477 glink stubs now reside. */
3478 glink = bfd_sections_find_if (abfd, section_covers_vma,
3479 &glink_vma);
3480 break;
3481 }
3482 }
3483
3484 free (dynbuf);
3485 }
3486
3487 if (glink != NULL)
3488 {
3489 /* Determine __glink trampoline by reading the relative branch
3490 from the first glink stub. */
3491 bfd_byte buf[4];
3492 unsigned int off = 0;
3493
3494 while (bfd_get_section_contents (abfd, glink, buf,
3495 glink_vma + off - glink->vma, 4))
3496 {
3497 unsigned int insn = bfd_get_32 (abfd, buf);
3498 insn ^= B_DOT;
3499 if ((insn & ~0x3fffffc) == 0)
3500 {
3501 resolv_vma = glink_vma + off + (insn ^ 0x2000000) - 0x2000000;
3502 break;
3503 }
3504 off += 4;
3505 if (off > 4)
3506 break;
3507 }
3508
3509 if (resolv_vma)
3510 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
3511
3512 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
3513 if (relplt != NULL)
3514 {
3515 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3516 if (! (*slurp_relocs) (abfd, relplt, dyn_syms, TRUE))
3517 goto free_contents_and_exit_err;
3518
3519 plt_count = relplt->size / sizeof (Elf64_External_Rela);
3520 size += plt_count * sizeof (asymbol);
3521
3522 p = relplt->relocation;
3523 for (i = 0; i < plt_count; i++, p++)
3524 {
3525 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
3526 if (p->addend != 0)
3527 size += sizeof ("+0x") - 1 + 16;
3528 }
3529 }
3530 }
3531
3532 if (size == 0)
3533 goto free_contents_and_exit;
3534 s = *ret = bfd_malloc (size);
3535 if (s == NULL)
3536 goto free_contents_and_exit_err;
3537
3538 names = (char *) (s + count + plt_count + (resolv_vma != 0));
3539
3540 for (i = secsymend; i < opdsymend; ++i)
3541 {
3542 bfd_vma ent;
3543
3544 if (syms[i]->value > opd->size - 8)
3545 continue;
3546
3547 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3548 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3549 {
3550 long lo, hi;
3551 size_t len;
3552 asection *sec = abfd->sections;
3553
3554 *s = *syms[i];
3555 lo = codesecsym;
3556 hi = codesecsymend;
3557 while (lo < hi)
3558 {
3559 long mid = (lo + hi) >> 1;
3560 if (syms[mid]->section->vma < ent)
3561 lo = mid + 1;
3562 else if (syms[mid]->section->vma > ent)
3563 hi = mid;
3564 else
3565 {
3566 sec = syms[mid]->section;
3567 break;
3568 }
3569 }
3570
3571 if (lo >= hi && lo > codesecsym)
3572 sec = syms[lo - 1]->section;
3573
3574 for (; sec != NULL; sec = sec->next)
3575 {
3576 if (sec->vma > ent)
3577 break;
3578 /* SEC_LOAD may not be set if SEC is from a separate debug
3579 info file. */
3580 if ((sec->flags & SEC_ALLOC) == 0)
3581 break;
3582 if ((sec->flags & SEC_CODE) != 0)
3583 s->section = sec;
3584 }
3585 s->flags |= BSF_SYNTHETIC;
3586 s->value = ent - s->section->vma;
3587 s->name = names;
3588 *names++ = '.';
3589 len = strlen (syms[i]->name);
3590 memcpy (names, syms[i]->name, len + 1);
3591 names += len + 1;
3592 /* Have udata.p point back to the original symbol this
3593 synthetic symbol was derived from. */
3594 s->udata.p = syms[i];
3595 s++;
3596 }
3597 }
3598 free (contents);
3599
3600 if (glink != NULL && relplt != NULL)
3601 {
3602 if (resolv_vma)
3603 {
3604 /* Add a symbol for the main glink trampoline. */
3605 memset (s, 0, sizeof *s);
3606 s->the_bfd = abfd;
3607 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3608 s->section = glink;
3609 s->value = resolv_vma - glink->vma;
3610 s->name = names;
3611 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3612 names += sizeof ("__glink_PLTresolve");
3613 s++;
3614 count++;
3615 }
3616
3617 /* FIXME: It would be very much nicer to put sym@plt on the
3618 stub rather than on the glink branch table entry. The
3619 objdump disassembler would then use a sensible symbol
3620 name on plt calls. The difficulty in doing so is
3621 a) finding the stubs, and,
3622 b) matching stubs against plt entries, and,
3623 c) there can be multiple stubs for a given plt entry.
3624
3625 Solving (a) could be done by code scanning, but older
3626 ppc64 binaries used different stubs to current code.
3627 (b) is the tricky one since you need to known the toc
3628 pointer for at least one function that uses a pic stub to
3629 be able to calculate the plt address referenced.
3630 (c) means gdb would need to set multiple breakpoints (or
3631 find the glink branch itself) when setting breakpoints
3632 for pending shared library loads. */
3633 p = relplt->relocation;
3634 for (i = 0; i < plt_count; i++, p++)
3635 {
3636 size_t len;
3637
3638 *s = **p->sym_ptr_ptr;
3639 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
3640 we are defining a symbol, ensure one of them is set. */
3641 if ((s->flags & BSF_LOCAL) == 0)
3642 s->flags |= BSF_GLOBAL;
3643 s->flags |= BSF_SYNTHETIC;
3644 s->section = glink;
3645 s->value = glink_vma - glink->vma;
3646 s->name = names;
3647 s->udata.p = NULL;
3648 len = strlen ((*p->sym_ptr_ptr)->name);
3649 memcpy (names, (*p->sym_ptr_ptr)->name, len);
3650 names += len;
3651 if (p->addend != 0)
3652 {
3653 memcpy (names, "+0x", sizeof ("+0x") - 1);
3654 names += sizeof ("+0x") - 1;
3655 bfd_sprintf_vma (abfd, names, p->addend);
3656 names += strlen (names);
3657 }
3658 memcpy (names, "@plt", sizeof ("@plt"));
3659 names += sizeof ("@plt");
3660 s++;
3661 if (abi < 2)
3662 {
3663 glink_vma += 8;
3664 if (i >= 0x8000)
3665 glink_vma += 4;
3666 }
3667 else
3668 glink_vma += 4;
3669 }
3670 count += plt_count;
3671 }
3672 }
3673
3674 done:
3675 free (syms);
3676 return count;
3677 }
3678 \f
3679 /* The following functions are specific to the ELF linker, while
3680 functions above are used generally. Those named ppc64_elf_* are
3681 called by the main ELF linker code. They appear in this file more
3682 or less in the order in which they are called. eg.
3683 ppc64_elf_check_relocs is called early in the link process,
3684 ppc64_elf_finish_dynamic_sections is one of the last functions
3685 called.
3686
3687 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
3688 functions have both a function code symbol and a function descriptor
3689 symbol. A call to foo in a relocatable object file looks like:
3690
3691 . .text
3692 . x:
3693 . bl .foo
3694 . nop
3695
3696 The function definition in another object file might be:
3697
3698 . .section .opd
3699 . foo: .quad .foo
3700 . .quad .TOC.@tocbase
3701 . .quad 0
3702 .
3703 . .text
3704 . .foo: blr
3705
3706 When the linker resolves the call during a static link, the branch
3707 unsurprisingly just goes to .foo and the .opd information is unused.
3708 If the function definition is in a shared library, things are a little
3709 different: The call goes via a plt call stub, the opd information gets
3710 copied to the plt, and the linker patches the nop.
3711
3712 . x:
3713 . bl .foo_stub
3714 . ld 2,40(1)
3715 .
3716 .
3717 . .foo_stub:
3718 . std 2,40(1) # in practice, the call stub
3719 . addis 11,2,Lfoo@toc@ha # is slightly optimized, but
3720 . addi 11,11,Lfoo@toc@l # this is the general idea
3721 . ld 12,0(11)
3722 . ld 2,8(11)
3723 . mtctr 12
3724 . ld 11,16(11)
3725 . bctr
3726 .
3727 . .section .plt
3728 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
3729
3730 The "reloc ()" notation is supposed to indicate that the linker emits
3731 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
3732 copying.
3733
3734 What are the difficulties here? Well, firstly, the relocations
3735 examined by the linker in check_relocs are against the function code
3736 sym .foo, while the dynamic relocation in the plt is emitted against
3737 the function descriptor symbol, foo. Somewhere along the line, we need
3738 to carefully copy dynamic link information from one symbol to the other.
3739 Secondly, the generic part of the elf linker will make .foo a dynamic
3740 symbol as is normal for most other backends. We need foo dynamic
3741 instead, at least for an application final link. However, when
3742 creating a shared library containing foo, we need to have both symbols
3743 dynamic so that references to .foo are satisfied during the early
3744 stages of linking. Otherwise the linker might decide to pull in a
3745 definition from some other object, eg. a static library.
3746
3747 Update: As of August 2004, we support a new convention. Function
3748 calls may use the function descriptor symbol, ie. "bl foo". This
3749 behaves exactly as "bl .foo". */
3750
3751 /* Of those relocs that might be copied as dynamic relocs, this function
3752 selects those that must be copied when linking a shared library,
3753 even when the symbol is local. */
3754
3755 static int
3756 must_be_dyn_reloc (struct bfd_link_info *info,
3757 enum elf_ppc64_reloc_type r_type)
3758 {
3759 switch (r_type)
3760 {
3761 default:
3762 return 1;
3763
3764 case R_PPC64_REL32:
3765 case R_PPC64_REL64:
3766 case R_PPC64_REL30:
3767 return 0;
3768
3769 case R_PPC64_TPREL16:
3770 case R_PPC64_TPREL16_LO:
3771 case R_PPC64_TPREL16_HI:
3772 case R_PPC64_TPREL16_HA:
3773 case R_PPC64_TPREL16_DS:
3774 case R_PPC64_TPREL16_LO_DS:
3775 case R_PPC64_TPREL16_HIGH:
3776 case R_PPC64_TPREL16_HIGHA:
3777 case R_PPC64_TPREL16_HIGHER:
3778 case R_PPC64_TPREL16_HIGHERA:
3779 case R_PPC64_TPREL16_HIGHEST:
3780 case R_PPC64_TPREL16_HIGHESTA:
3781 case R_PPC64_TPREL64:
3782 return !bfd_link_executable (info);
3783 }
3784 }
3785
3786 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3787 copying dynamic variables from a shared lib into an app's dynbss
3788 section, and instead use a dynamic relocation to point into the
3789 shared lib. With code that gcc generates, it's vital that this be
3790 enabled; In the PowerPC64 ABI, the address of a function is actually
3791 the address of a function descriptor, which resides in the .opd
3792 section. gcc uses the descriptor directly rather than going via the
3793 GOT as some other ABI's do, which means that initialized function
3794 pointers must reference the descriptor. Thus, a function pointer
3795 initialized to the address of a function in a shared library will
3796 either require a copy reloc, or a dynamic reloc. Using a copy reloc
3797 redefines the function descriptor symbol to point to the copy. This
3798 presents a problem as a plt entry for that function is also
3799 initialized from the function descriptor symbol and the copy reloc
3800 may not be initialized first. */
3801 #define ELIMINATE_COPY_RELOCS 1
3802
3803 /* Section name for stubs is the associated section name plus this
3804 string. */
3805 #define STUB_SUFFIX ".stub"
3806
3807 /* Linker stubs.
3808 ppc_stub_long_branch:
3809 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
3810 destination, but a 24 bit branch in a stub section will reach.
3811 . b dest
3812
3813 ppc_stub_plt_branch:
3814 Similar to the above, but a 24 bit branch in the stub section won't
3815 reach its destination.
3816 . addis %r11,%r2,xxx@toc@ha
3817 . ld %r12,xxx@toc@l(%r11)
3818 . mtctr %r12
3819 . bctr
3820
3821 ppc_stub_plt_call:
3822 Used to call a function in a shared library. If it so happens that
3823 the plt entry referenced crosses a 64k boundary, then an extra
3824 "addi %r11,%r11,xxx@toc@l" will be inserted before the "mtctr".
3825 . std %r2,40(%r1)
3826 . addis %r11,%r2,xxx@toc@ha
3827 . ld %r12,xxx+0@toc@l(%r11)
3828 . mtctr %r12
3829 . ld %r2,xxx+8@toc@l(%r11)
3830 . ld %r11,xxx+16@toc@l(%r11)
3831 . bctr
3832
3833 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
3834 code to adjust the value and save r2 to support multiple toc sections.
3835 A ppc_stub_long_branch with an r2 offset looks like:
3836 . std %r2,40(%r1)
3837 . addis %r2,%r2,off@ha
3838 . addi %r2,%r2,off@l
3839 . b dest
3840
3841 A ppc_stub_plt_branch with an r2 offset looks like:
3842 . std %r2,40(%r1)
3843 . addis %r11,%r2,xxx@toc@ha
3844 . ld %r12,xxx@toc@l(%r11)
3845 . addis %r2,%r2,off@ha
3846 . addi %r2,%r2,off@l
3847 . mtctr %r12
3848 . bctr
3849
3850 In cases where the "addis" instruction would add zero, the "addis" is
3851 omitted and following instructions modified slightly in some cases.
3852 */
3853
3854 enum ppc_stub_type {
3855 ppc_stub_none,
3856 ppc_stub_long_branch,
3857 ppc_stub_long_branch_r2off,
3858 ppc_stub_plt_branch,
3859 ppc_stub_plt_branch_r2off,
3860 ppc_stub_plt_call,
3861 ppc_stub_plt_call_r2save,
3862 ppc_stub_global_entry,
3863 ppc_stub_save_res
3864 };
3865
3866 /* Information on stub grouping. */
3867 struct map_stub
3868 {
3869 /* The stub section. */
3870 asection *stub_sec;
3871 /* This is the section to which stubs in the group will be attached. */
3872 asection *link_sec;
3873 /* Next group. */
3874 struct map_stub *next;
3875 /* Whether to emit a copy of register save/restore functions in this
3876 group. */
3877 int needs_save_res;
3878 };
3879
3880 struct ppc_stub_hash_entry {
3881
3882 /* Base hash table entry structure. */
3883 struct bfd_hash_entry root;
3884
3885 enum ppc_stub_type stub_type;
3886
3887 /* Group information. */
3888 struct map_stub *group;
3889
3890 /* Offset within stub_sec of the beginning of this stub. */
3891 bfd_vma stub_offset;
3892
3893 /* Given the symbol's value and its section we can determine its final
3894 value when building the stubs (so the stub knows where to jump. */
3895 bfd_vma target_value;
3896 asection *target_section;
3897
3898 /* The symbol table entry, if any, that this was derived from. */
3899 struct ppc_link_hash_entry *h;
3900 struct plt_entry *plt_ent;
3901
3902 /* Symbol st_other. */
3903 unsigned char other;
3904 };
3905
3906 struct ppc_branch_hash_entry {
3907
3908 /* Base hash table entry structure. */
3909 struct bfd_hash_entry root;
3910
3911 /* Offset within branch lookup table. */
3912 unsigned int offset;
3913
3914 /* Generation marker. */
3915 unsigned int iter;
3916 };
3917
3918 /* Used to track dynamic relocations for local symbols. */
3919 struct ppc_dyn_relocs
3920 {
3921 struct ppc_dyn_relocs *next;
3922
3923 /* The input section of the reloc. */
3924 asection *sec;
3925
3926 /* Total number of relocs copied for the input section. */
3927 unsigned int count : 31;
3928
3929 /* Whether this entry is for STT_GNU_IFUNC symbols. */
3930 unsigned int ifunc : 1;
3931 };
3932
3933 struct ppc_link_hash_entry
3934 {
3935 struct elf_link_hash_entry elf;
3936
3937 union {
3938 /* A pointer to the most recently used stub hash entry against this
3939 symbol. */
3940 struct ppc_stub_hash_entry *stub_cache;
3941
3942 /* A pointer to the next symbol starting with a '.' */
3943 struct ppc_link_hash_entry *next_dot_sym;
3944 } u;
3945
3946 /* Track dynamic relocs copied for this symbol. */
3947 struct elf_dyn_relocs *dyn_relocs;
3948
3949 /* Link between function code and descriptor symbols. */
3950 struct ppc_link_hash_entry *oh;
3951
3952 /* Flag function code and descriptor symbols. */
3953 unsigned int is_func:1;
3954 unsigned int is_func_descriptor:1;
3955 unsigned int fake:1;
3956
3957 /* Whether global opd/toc sym has been adjusted or not.
3958 After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
3959 should be set for all globals defined in any opd/toc section. */
3960 unsigned int adjust_done:1;
3961
3962 /* Set if we twiddled this symbol to weak at some stage. */
3963 unsigned int was_undefined:1;
3964
3965 /* Set if this is an out-of-line register save/restore function,
3966 with non-standard calling convention. */
3967 unsigned int save_res:1;
3968
3969 /* Contexts in which symbol is used in the GOT (or TOC).
3970 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
3971 corresponding relocs are encountered during check_relocs.
3972 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3973 indicate the corresponding GOT entry type is not needed.
3974 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
3975 a TPREL one. We use a separate flag rather than setting TPREL
3976 just for convenience in distinguishing the two cases. */
3977 #define TLS_GD 1 /* GD reloc. */
3978 #define TLS_LD 2 /* LD reloc. */
3979 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3980 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3981 #define TLS_TLS 16 /* Any TLS reloc. */
3982 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
3983 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
3984 #define PLT_IFUNC 128 /* STT_GNU_IFUNC. */
3985 unsigned char tls_mask;
3986 };
3987
3988 /* ppc64 ELF linker hash table. */
3989
3990 struct ppc_link_hash_table
3991 {
3992 struct elf_link_hash_table elf;
3993
3994 /* The stub hash table. */
3995 struct bfd_hash_table stub_hash_table;
3996
3997 /* Another hash table for plt_branch stubs. */
3998 struct bfd_hash_table branch_hash_table;
3999
4000 /* Hash table for function prologue tocsave. */
4001 htab_t tocsave_htab;
4002
4003 /* Various options and other info passed from the linker. */
4004 struct ppc64_elf_params *params;
4005
4006 /* The size of sec_info below. */
4007 unsigned int sec_info_arr_size;
4008
4009 /* Per-section array of extra section info. Done this way rather
4010 than as part of ppc64_elf_section_data so we have the info for
4011 non-ppc64 sections. */
4012 struct
4013 {
4014 /* Along with elf_gp, specifies the TOC pointer used by this section. */
4015 bfd_vma toc_off;
4016
4017 union
4018 {
4019 /* The section group that this section belongs to. */
4020 struct map_stub *group;
4021 /* A temp section list pointer. */
4022 asection *list;
4023 } u;
4024 } *sec_info;
4025
4026 /* Linked list of groups. */
4027 struct map_stub *group;
4028
4029 /* Temp used when calculating TOC pointers. */
4030 bfd_vma toc_curr;
4031 bfd *toc_bfd;
4032 asection *toc_first_sec;
4033
4034 /* Used when adding symbols. */
4035 struct ppc_link_hash_entry *dot_syms;
4036
4037 /* Shortcuts to get to dynamic linker sections. */
4038 asection *dynbss;
4039 asection *relbss;
4040 asection *glink;
4041 asection *sfpr;
4042 asection *brlt;
4043 asection *relbrlt;
4044 asection *glink_eh_frame;
4045
4046 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
4047 struct ppc_link_hash_entry *tls_get_addr;
4048 struct ppc_link_hash_entry *tls_get_addr_fd;
4049
4050 /* The size of reliplt used by got entry relocs. */
4051 bfd_size_type got_reli_size;
4052
4053 /* Statistics. */
4054 unsigned long stub_count[ppc_stub_global_entry];
4055
4056 /* Number of stubs against global syms. */
4057 unsigned long stub_globals;
4058
4059 /* Set if we're linking code with function descriptors. */
4060 unsigned int opd_abi:1;
4061
4062 /* Support for multiple toc sections. */
4063 unsigned int do_multi_toc:1;
4064 unsigned int multi_toc_needed:1;
4065 unsigned int second_toc_pass:1;
4066 unsigned int do_toc_opt:1;
4067
4068 /* Set on error. */
4069 unsigned int stub_error:1;
4070
4071 /* Temp used by ppc64_elf_before_check_relocs. */
4072 unsigned int twiddled_syms:1;
4073
4074 /* Incremented every time we size stubs. */
4075 unsigned int stub_iteration;
4076
4077 /* Small local sym cache. */
4078 struct sym_cache sym_cache;
4079 };
4080
4081 /* Rename some of the generic section flags to better document how they
4082 are used here. */
4083
4084 /* Nonzero if this section has TLS related relocations. */
4085 #define has_tls_reloc sec_flg0
4086
4087 /* Nonzero if this section has a call to __tls_get_addr. */
4088 #define has_tls_get_addr_call sec_flg1
4089
4090 /* Nonzero if this section has any toc or got relocs. */
4091 #define has_toc_reloc sec_flg2
4092
4093 /* Nonzero if this section has a call to another section that uses
4094 the toc or got. */
4095 #define makes_toc_func_call sec_flg3
4096
4097 /* Recursion protection when determining above flag. */
4098 #define call_check_in_progress sec_flg4
4099 #define call_check_done sec_flg5
4100
4101 /* Get the ppc64 ELF linker hash table from a link_info structure. */
4102
4103 #define ppc_hash_table(p) \
4104 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
4105 == PPC64_ELF_DATA ? ((struct ppc_link_hash_table *) ((p)->hash)) : NULL)
4106
4107 #define ppc_stub_hash_lookup(table, string, create, copy) \
4108 ((struct ppc_stub_hash_entry *) \
4109 bfd_hash_lookup ((table), (string), (create), (copy)))
4110
4111 #define ppc_branch_hash_lookup(table, string, create, copy) \
4112 ((struct ppc_branch_hash_entry *) \
4113 bfd_hash_lookup ((table), (string), (create), (copy)))
4114
4115 /* Create an entry in the stub hash table. */
4116
4117 static struct bfd_hash_entry *
4118 stub_hash_newfunc (struct bfd_hash_entry *entry,
4119 struct bfd_hash_table *table,
4120 const char *string)
4121 {
4122 /* Allocate the structure if it has not already been allocated by a
4123 subclass. */
4124 if (entry == NULL)
4125 {
4126 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
4127 if (entry == NULL)
4128 return entry;
4129 }
4130
4131 /* Call the allocation method of the superclass. */
4132 entry = bfd_hash_newfunc (entry, table, string);
4133 if (entry != NULL)
4134 {
4135 struct ppc_stub_hash_entry *eh;
4136
4137 /* Initialize the local fields. */
4138 eh = (struct ppc_stub_hash_entry *) entry;
4139 eh->stub_type = ppc_stub_none;
4140 eh->group = NULL;
4141 eh->stub_offset = 0;
4142 eh->target_value = 0;
4143 eh->target_section = NULL;
4144 eh->h = NULL;
4145 eh->plt_ent = NULL;
4146 eh->other = 0;
4147 }
4148
4149 return entry;
4150 }
4151
4152 /* Create an entry in the branch hash table. */
4153
4154 static struct bfd_hash_entry *
4155 branch_hash_newfunc (struct bfd_hash_entry *entry,
4156 struct bfd_hash_table *table,
4157 const char *string)
4158 {
4159 /* Allocate the structure if it has not already been allocated by a
4160 subclass. */
4161 if (entry == NULL)
4162 {
4163 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
4164 if (entry == NULL)
4165 return entry;
4166 }
4167
4168 /* Call the allocation method of the superclass. */
4169 entry = bfd_hash_newfunc (entry, table, string);
4170 if (entry != NULL)
4171 {
4172 struct ppc_branch_hash_entry *eh;
4173
4174 /* Initialize the local fields. */
4175 eh = (struct ppc_branch_hash_entry *) entry;
4176 eh->offset = 0;
4177 eh->iter = 0;
4178 }
4179
4180 return entry;
4181 }
4182
4183 /* Create an entry in a ppc64 ELF linker hash table. */
4184
4185 static struct bfd_hash_entry *
4186 link_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_link_hash_entry));
4195 if (entry == NULL)
4196 return entry;
4197 }
4198
4199 /* Call the allocation method of the superclass. */
4200 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
4201 if (entry != NULL)
4202 {
4203 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
4204
4205 memset (&eh->u.stub_cache, 0,
4206 (sizeof (struct ppc_link_hash_entry)
4207 - offsetof (struct ppc_link_hash_entry, u.stub_cache)));
4208
4209 /* When making function calls, old ABI code references function entry
4210 points (dot symbols), while new ABI code references the function
4211 descriptor symbol. We need to make any combination of reference and
4212 definition work together, without breaking archive linking.
4213
4214 For a defined function "foo" and an undefined call to "bar":
4215 An old object defines "foo" and ".foo", references ".bar" (possibly
4216 "bar" too).
4217 A new object defines "foo" and references "bar".
4218
4219 A new object thus has no problem with its undefined symbols being
4220 satisfied by definitions in an old object. On the other hand, the
4221 old object won't have ".bar" satisfied by a new object.
4222
4223 Keep a list of newly added dot-symbols. */
4224
4225 if (string[0] == '.')
4226 {
4227 struct ppc_link_hash_table *htab;
4228
4229 htab = (struct ppc_link_hash_table *) table;
4230 eh->u.next_dot_sym = htab->dot_syms;
4231 htab->dot_syms = eh;
4232 }
4233 }
4234
4235 return entry;
4236 }
4237
4238 struct tocsave_entry {
4239 asection *sec;
4240 bfd_vma offset;
4241 };
4242
4243 static hashval_t
4244 tocsave_htab_hash (const void *p)
4245 {
4246 const struct tocsave_entry *e = (const struct tocsave_entry *) p;
4247 return ((bfd_vma)(intptr_t) e->sec ^ e->offset) >> 3;
4248 }
4249
4250 static int
4251 tocsave_htab_eq (const void *p1, const void *p2)
4252 {
4253 const struct tocsave_entry *e1 = (const struct tocsave_entry *) p1;
4254 const struct tocsave_entry *e2 = (const struct tocsave_entry *) p2;
4255 return e1->sec == e2->sec && e1->offset == e2->offset;
4256 }
4257
4258 /* Destroy a ppc64 ELF linker hash table. */
4259
4260 static void
4261 ppc64_elf_link_hash_table_free (bfd *obfd)
4262 {
4263 struct ppc_link_hash_table *htab;
4264
4265 htab = (struct ppc_link_hash_table *) obfd->link.hash;
4266 if (htab->tocsave_htab)
4267 htab_delete (htab->tocsave_htab);
4268 bfd_hash_table_free (&htab->branch_hash_table);
4269 bfd_hash_table_free (&htab->stub_hash_table);
4270 _bfd_elf_link_hash_table_free (obfd);
4271 }
4272
4273 /* Create a ppc64 ELF linker hash table. */
4274
4275 static struct bfd_link_hash_table *
4276 ppc64_elf_link_hash_table_create (bfd *abfd)
4277 {
4278 struct ppc_link_hash_table *htab;
4279 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
4280
4281 htab = bfd_zmalloc (amt);
4282 if (htab == NULL)
4283 return NULL;
4284
4285 if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc,
4286 sizeof (struct ppc_link_hash_entry),
4287 PPC64_ELF_DATA))
4288 {
4289 free (htab);
4290 return NULL;
4291 }
4292
4293 /* Init the stub hash table too. */
4294 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc,
4295 sizeof (struct ppc_stub_hash_entry)))
4296 {
4297 _bfd_elf_link_hash_table_free (abfd);
4298 return NULL;
4299 }
4300
4301 /* And the branch hash table. */
4302 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc,
4303 sizeof (struct ppc_branch_hash_entry)))
4304 {
4305 bfd_hash_table_free (&htab->stub_hash_table);
4306 _bfd_elf_link_hash_table_free (abfd);
4307 return NULL;
4308 }
4309
4310 htab->tocsave_htab = htab_try_create (1024,
4311 tocsave_htab_hash,
4312 tocsave_htab_eq,
4313 NULL);
4314 if (htab->tocsave_htab == NULL)
4315 {
4316 ppc64_elf_link_hash_table_free (abfd);
4317 return NULL;
4318 }
4319 htab->elf.root.hash_table_free = ppc64_elf_link_hash_table_free;
4320
4321 /* Initializing two fields of the union is just cosmetic. We really
4322 only care about glist, but when compiled on a 32-bit host the
4323 bfd_vma fields are larger. Setting the bfd_vma to zero makes
4324 debugger inspection of these fields look nicer. */
4325 htab->elf.init_got_refcount.refcount = 0;
4326 htab->elf.init_got_refcount.glist = NULL;
4327 htab->elf.init_plt_refcount.refcount = 0;
4328 htab->elf.init_plt_refcount.glist = NULL;
4329 htab->elf.init_got_offset.offset = 0;
4330 htab->elf.init_got_offset.glist = NULL;
4331 htab->elf.init_plt_offset.offset = 0;
4332 htab->elf.init_plt_offset.glist = NULL;
4333
4334 return &htab->elf.root;
4335 }
4336
4337 /* Create sections for linker generated code. */
4338
4339 static bfd_boolean
4340 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
4341 {
4342 struct ppc_link_hash_table *htab;
4343 flagword flags;
4344
4345 htab = ppc_hash_table (info);
4346
4347 /* Create .sfpr for code to save and restore fp regs. */
4348 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
4349 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4350 htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr",
4351 flags);
4352 if (htab->sfpr == NULL
4353 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
4354 return FALSE;
4355
4356 /* Create .glink for lazy dynamic linking support. */
4357 htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink",
4358 flags);
4359 if (htab->glink == NULL
4360 || ! bfd_set_section_alignment (dynobj, htab->glink, 3))
4361 return FALSE;
4362
4363 if (!info->no_ld_generated_unwind_info)
4364 {
4365 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
4366 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4367 htab->glink_eh_frame = bfd_make_section_anyway_with_flags (dynobj,
4368 ".eh_frame",
4369 flags);
4370 if (htab->glink_eh_frame == NULL
4371 || !bfd_set_section_alignment (dynobj, htab->glink_eh_frame, 2))
4372 return FALSE;
4373 }
4374
4375 flags = SEC_ALLOC | SEC_LINKER_CREATED;
4376 htab->elf.iplt = bfd_make_section_anyway_with_flags (dynobj, ".iplt", flags);
4377 if (htab->elf.iplt == NULL
4378 || ! bfd_set_section_alignment (dynobj, htab->elf.iplt, 3))
4379 return FALSE;
4380
4381 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4382 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4383 htab->elf.irelplt
4384 = bfd_make_section_anyway_with_flags (dynobj, ".rela.iplt", flags);
4385 if (htab->elf.irelplt == NULL
4386 || ! bfd_set_section_alignment (dynobj, htab->elf.irelplt, 3))
4387 return FALSE;
4388
4389 /* Create branch lookup table for plt_branch stubs. */
4390 flags = (SEC_ALLOC | SEC_LOAD
4391 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4392 htab->brlt = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt",
4393 flags);
4394 if (htab->brlt == NULL
4395 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
4396 return FALSE;
4397
4398 if (!bfd_link_pic (info))
4399 return TRUE;
4400
4401 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4402 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4403 htab->relbrlt = bfd_make_section_anyway_with_flags (dynobj,
4404 ".rela.branch_lt",
4405 flags);
4406 if (htab->relbrlt == NULL
4407 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
4408 return FALSE;
4409
4410 return TRUE;
4411 }
4412
4413 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
4414
4415 bfd_boolean
4416 ppc64_elf_init_stub_bfd (struct bfd_link_info *info,
4417 struct ppc64_elf_params *params)
4418 {
4419 struct ppc_link_hash_table *htab;
4420
4421 elf_elfheader (params->stub_bfd)->e_ident[EI_CLASS] = ELFCLASS64;
4422
4423 /* Always hook our dynamic sections into the first bfd, which is the
4424 linker created stub bfd. This ensures that the GOT header is at
4425 the start of the output TOC section. */
4426 htab = ppc_hash_table (info);
4427 if (htab == NULL)
4428 return FALSE;
4429 htab->elf.dynobj = params->stub_bfd;
4430 htab->params = params;
4431
4432 if (bfd_link_relocatable (info))
4433 return TRUE;
4434
4435 return create_linkage_sections (htab->elf.dynobj, info);
4436 }
4437
4438 /* Build a name for an entry in the stub hash table. */
4439
4440 static char *
4441 ppc_stub_name (const asection *input_section,
4442 const asection *sym_sec,
4443 const struct ppc_link_hash_entry *h,
4444 const Elf_Internal_Rela *rel)
4445 {
4446 char *stub_name;
4447 ssize_t len;
4448
4449 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
4450 offsets from a sym as a branch target? In fact, we could
4451 probably assume the addend is always zero. */
4452 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
4453
4454 if (h)
4455 {
4456 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
4457 stub_name = bfd_malloc (len);
4458 if (stub_name == NULL)
4459 return stub_name;
4460
4461 len = sprintf (stub_name, "%08x.%s+%x",
4462 input_section->id & 0xffffffff,
4463 h->elf.root.root.string,
4464 (int) rel->r_addend & 0xffffffff);
4465 }
4466 else
4467 {
4468 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
4469 stub_name = bfd_malloc (len);
4470 if (stub_name == NULL)
4471 return stub_name;
4472
4473 len = sprintf (stub_name, "%08x.%x:%x+%x",
4474 input_section->id & 0xffffffff,
4475 sym_sec->id & 0xffffffff,
4476 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
4477 (int) rel->r_addend & 0xffffffff);
4478 }
4479 if (len > 2 && stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
4480 stub_name[len - 2] = 0;
4481 return stub_name;
4482 }
4483
4484 /* Look up an entry in the stub hash. Stub entries are cached because
4485 creating the stub name takes a bit of time. */
4486
4487 static struct ppc_stub_hash_entry *
4488 ppc_get_stub_entry (const asection *input_section,
4489 const asection *sym_sec,
4490 struct ppc_link_hash_entry *h,
4491 const Elf_Internal_Rela *rel,
4492 struct ppc_link_hash_table *htab)
4493 {
4494 struct ppc_stub_hash_entry *stub_entry;
4495 struct map_stub *group;
4496
4497 /* If this input section is part of a group of sections sharing one
4498 stub section, then use the id of the first section in the group.
4499 Stub names need to include a section id, as there may well be
4500 more than one stub used to reach say, printf, and we need to
4501 distinguish between them. */
4502 group = htab->sec_info[input_section->id].u.group;
4503
4504 if (h != NULL && h->u.stub_cache != NULL
4505 && h->u.stub_cache->h == h
4506 && h->u.stub_cache->group == group)
4507 {
4508 stub_entry = h->u.stub_cache;
4509 }
4510 else
4511 {
4512 char *stub_name;
4513
4514 stub_name = ppc_stub_name (group->link_sec, sym_sec, h, rel);
4515 if (stub_name == NULL)
4516 return NULL;
4517
4518 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
4519 stub_name, FALSE, FALSE);
4520 if (h != NULL)
4521 h->u.stub_cache = stub_entry;
4522
4523 free (stub_name);
4524 }
4525
4526 return stub_entry;
4527 }
4528
4529 /* Add a new stub entry to the stub hash. Not all fields of the new
4530 stub entry are initialised. */
4531
4532 static struct ppc_stub_hash_entry *
4533 ppc_add_stub (const char *stub_name,
4534 asection *section,
4535 struct bfd_link_info *info)
4536 {
4537 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4538 struct map_stub *group;
4539 asection *link_sec;
4540 asection *stub_sec;
4541 struct ppc_stub_hash_entry *stub_entry;
4542
4543 group = htab->sec_info[section->id].u.group;
4544 link_sec = group->link_sec;
4545 stub_sec = group->stub_sec;
4546 if (stub_sec == NULL)
4547 {
4548 size_t namelen;
4549 bfd_size_type len;
4550 char *s_name;
4551
4552 namelen = strlen (link_sec->name);
4553 len = namelen + sizeof (STUB_SUFFIX);
4554 s_name = bfd_alloc (htab->params->stub_bfd, len);
4555 if (s_name == NULL)
4556 return NULL;
4557
4558 memcpy (s_name, link_sec->name, namelen);
4559 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
4560 stub_sec = (*htab->params->add_stub_section) (s_name, link_sec);
4561 if (stub_sec == NULL)
4562 return NULL;
4563 group->stub_sec = stub_sec;
4564 }
4565
4566 /* Enter this entry into the linker stub hash table. */
4567 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
4568 TRUE, FALSE);
4569 if (stub_entry == NULL)
4570 {
4571 info->callbacks->einfo (_("%P: %B: cannot create stub entry %s\n"),
4572 section->owner, stub_name);
4573 return NULL;
4574 }
4575
4576 stub_entry->group = group;
4577 stub_entry->stub_offset = 0;
4578 return stub_entry;
4579 }
4580
4581 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
4582 not already done. */
4583
4584 static bfd_boolean
4585 create_got_section (bfd *abfd, struct bfd_link_info *info)
4586 {
4587 asection *got, *relgot;
4588 flagword flags;
4589 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4590
4591 if (!is_ppc64_elf (abfd))
4592 return FALSE;
4593 if (htab == NULL)
4594 return FALSE;
4595
4596 if (!htab->elf.sgot
4597 && !_bfd_elf_create_got_section (htab->elf.dynobj, info))
4598 return FALSE;
4599
4600 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
4601 | SEC_LINKER_CREATED);
4602
4603 got = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
4604 if (!got
4605 || !bfd_set_section_alignment (abfd, got, 3))
4606 return FALSE;
4607
4608 relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got",
4609 flags | SEC_READONLY);
4610 if (!relgot
4611 || ! bfd_set_section_alignment (abfd, relgot, 3))
4612 return FALSE;
4613
4614 ppc64_elf_tdata (abfd)->got = got;
4615 ppc64_elf_tdata (abfd)->relgot = relgot;
4616 return TRUE;
4617 }
4618
4619 /* Create the dynamic sections, and set up shortcuts. */
4620
4621 static bfd_boolean
4622 ppc64_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
4623 {
4624 struct ppc_link_hash_table *htab;
4625
4626 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
4627 return FALSE;
4628
4629 htab = ppc_hash_table (info);
4630 if (htab == NULL)
4631 return FALSE;
4632
4633 htab->dynbss = bfd_get_linker_section (dynobj, ".dynbss");
4634 if (!bfd_link_pic (info))
4635 htab->relbss = bfd_get_linker_section (dynobj, ".rela.bss");
4636
4637 if (!htab->elf.sgot || !htab->elf.splt || !htab->elf.srelplt || !htab->dynbss
4638 || (!bfd_link_pic (info) && !htab->relbss))
4639 abort ();
4640
4641 return TRUE;
4642 }
4643
4644 /* Follow indirect and warning symbol links. */
4645
4646 static inline struct bfd_link_hash_entry *
4647 follow_link (struct bfd_link_hash_entry *h)
4648 {
4649 while (h->type == bfd_link_hash_indirect
4650 || h->type == bfd_link_hash_warning)
4651 h = h->u.i.link;
4652 return h;
4653 }
4654
4655 static inline struct elf_link_hash_entry *
4656 elf_follow_link (struct elf_link_hash_entry *h)
4657 {
4658 return (struct elf_link_hash_entry *) follow_link (&h->root);
4659 }
4660
4661 static inline struct ppc_link_hash_entry *
4662 ppc_follow_link (struct ppc_link_hash_entry *h)
4663 {
4664 return (struct ppc_link_hash_entry *) follow_link (&h->elf.root);
4665 }
4666
4667 /* Merge PLT info on FROM with that on TO. */
4668
4669 static void
4670 move_plt_plist (struct ppc_link_hash_entry *from,
4671 struct ppc_link_hash_entry *to)
4672 {
4673 if (from->elf.plt.plist != NULL)
4674 {
4675 if (to->elf.plt.plist != NULL)
4676 {
4677 struct plt_entry **entp;
4678 struct plt_entry *ent;
4679
4680 for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; )
4681 {
4682 struct plt_entry *dent;
4683
4684 for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next)
4685 if (dent->addend == ent->addend)
4686 {
4687 dent->plt.refcount += ent->plt.refcount;
4688 *entp = ent->next;
4689 break;
4690 }
4691 if (dent == NULL)
4692 entp = &ent->next;
4693 }
4694 *entp = to->elf.plt.plist;
4695 }
4696
4697 to->elf.plt.plist = from->elf.plt.plist;
4698 from->elf.plt.plist = NULL;
4699 }
4700 }
4701
4702 /* Copy the extra info we tack onto an elf_link_hash_entry. */
4703
4704 static void
4705 ppc64_elf_copy_indirect_symbol (struct bfd_link_info *info,
4706 struct elf_link_hash_entry *dir,
4707 struct elf_link_hash_entry *ind)
4708 {
4709 struct ppc_link_hash_entry *edir, *eind;
4710
4711 edir = (struct ppc_link_hash_entry *) dir;
4712 eind = (struct ppc_link_hash_entry *) ind;
4713
4714 edir->is_func |= eind->is_func;
4715 edir->is_func_descriptor |= eind->is_func_descriptor;
4716 edir->tls_mask |= eind->tls_mask;
4717 if (eind->oh != NULL)
4718 edir->oh = ppc_follow_link (eind->oh);
4719
4720 /* If called to transfer flags for a weakdef during processing
4721 of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF.
4722 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
4723 if (!(ELIMINATE_COPY_RELOCS
4724 && eind->elf.root.type != bfd_link_hash_indirect
4725 && edir->elf.dynamic_adjusted))
4726 edir->elf.non_got_ref |= eind->elf.non_got_ref;
4727
4728 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
4729 edir->elf.ref_regular |= eind->elf.ref_regular;
4730 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
4731 edir->elf.needs_plt |= eind->elf.needs_plt;
4732 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed;
4733
4734 /* Copy over any dynamic relocs we may have on the indirect sym. */
4735 if (eind->dyn_relocs != NULL)
4736 {
4737 if (edir->dyn_relocs != NULL)
4738 {
4739 struct elf_dyn_relocs **pp;
4740 struct elf_dyn_relocs *p;
4741
4742 /* Add reloc counts against the indirect sym to the direct sym
4743 list. Merge any entries against the same section. */
4744 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
4745 {
4746 struct elf_dyn_relocs *q;
4747
4748 for (q = edir->dyn_relocs; q != NULL; q = q->next)
4749 if (q->sec == p->sec)
4750 {
4751 q->pc_count += p->pc_count;
4752 q->count += p->count;
4753 *pp = p->next;
4754 break;
4755 }
4756 if (q == NULL)
4757 pp = &p->next;
4758 }
4759 *pp = edir->dyn_relocs;
4760 }
4761
4762 edir->dyn_relocs = eind->dyn_relocs;
4763 eind->dyn_relocs = NULL;
4764 }
4765
4766 /* If we were called to copy over info for a weak sym, that's all.
4767 You might think dyn_relocs need not be copied over; After all,
4768 both syms will be dynamic or both non-dynamic so we're just
4769 moving reloc accounting around. However, ELIMINATE_COPY_RELOCS
4770 code in ppc64_elf_adjust_dynamic_symbol needs to check for
4771 dyn_relocs in read-only sections, and it does so on what is the
4772 DIR sym here. */
4773 if (eind->elf.root.type != bfd_link_hash_indirect)
4774 return;
4775
4776 /* Copy over got entries that we may have already seen to the
4777 symbol which just became indirect. */
4778 if (eind->elf.got.glist != NULL)
4779 {
4780 if (edir->elf.got.glist != NULL)
4781 {
4782 struct got_entry **entp;
4783 struct got_entry *ent;
4784
4785 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
4786 {
4787 struct got_entry *dent;
4788
4789 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
4790 if (dent->addend == ent->addend
4791 && dent->owner == ent->owner
4792 && dent->tls_type == ent->tls_type)
4793 {
4794 dent->got.refcount += ent->got.refcount;
4795 *entp = ent->next;
4796 break;
4797 }
4798 if (dent == NULL)
4799 entp = &ent->next;
4800 }
4801 *entp = edir->elf.got.glist;
4802 }
4803
4804 edir->elf.got.glist = eind->elf.got.glist;
4805 eind->elf.got.glist = NULL;
4806 }
4807
4808 /* And plt entries. */
4809 move_plt_plist (eind, edir);
4810
4811 if (eind->elf.dynindx != -1)
4812 {
4813 if (edir->elf.dynindx != -1)
4814 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4815 edir->elf.dynstr_index);
4816 edir->elf.dynindx = eind->elf.dynindx;
4817 edir->elf.dynstr_index = eind->elf.dynstr_index;
4818 eind->elf.dynindx = -1;
4819 eind->elf.dynstr_index = 0;
4820 }
4821 }
4822
4823 /* Find the function descriptor hash entry from the given function code
4824 hash entry FH. Link the entries via their OH fields. */
4825
4826 static struct ppc_link_hash_entry *
4827 lookup_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
4828 {
4829 struct ppc_link_hash_entry *fdh = fh->oh;
4830
4831 if (fdh == NULL)
4832 {
4833 const char *fd_name = fh->elf.root.root.string + 1;
4834
4835 fdh = (struct ppc_link_hash_entry *)
4836 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
4837 if (fdh == NULL)
4838 return fdh;
4839
4840 fdh->is_func_descriptor = 1;
4841 fdh->oh = fh;
4842 fh->is_func = 1;
4843 fh->oh = fdh;
4844 }
4845
4846 return ppc_follow_link (fdh);
4847 }
4848
4849 /* Make a fake function descriptor sym for the code sym FH. */
4850
4851 static struct ppc_link_hash_entry *
4852 make_fdh (struct bfd_link_info *info,
4853 struct ppc_link_hash_entry *fh)
4854 {
4855 bfd *abfd;
4856 asymbol *newsym;
4857 struct bfd_link_hash_entry *bh;
4858 struct ppc_link_hash_entry *fdh;
4859
4860 abfd = fh->elf.root.u.undef.abfd;
4861 newsym = bfd_make_empty_symbol (abfd);
4862 newsym->name = fh->elf.root.root.string + 1;
4863 newsym->section = bfd_und_section_ptr;
4864 newsym->value = 0;
4865 newsym->flags = BSF_WEAK;
4866
4867 bh = NULL;
4868 if (!_bfd_generic_link_add_one_symbol (info, abfd, newsym->name,
4869 newsym->flags, newsym->section,
4870 newsym->value, NULL, FALSE, FALSE,
4871 &bh))
4872 return NULL;
4873
4874 fdh = (struct ppc_link_hash_entry *) bh;
4875 fdh->elf.non_elf = 0;
4876 fdh->fake = 1;
4877 fdh->is_func_descriptor = 1;
4878 fdh->oh = fh;
4879 fh->is_func = 1;
4880 fh->oh = fdh;
4881 return fdh;
4882 }
4883
4884 /* Fix function descriptor symbols defined in .opd sections to be
4885 function type. */
4886
4887 static bfd_boolean
4888 ppc64_elf_add_symbol_hook (bfd *ibfd,
4889 struct bfd_link_info *info,
4890 Elf_Internal_Sym *isym,
4891 const char **name,
4892 flagword *flags ATTRIBUTE_UNUSED,
4893 asection **sec,
4894 bfd_vma *value)
4895 {
4896 if ((ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC
4897 || ELF_ST_BIND (isym->st_info) == STB_GNU_UNIQUE)
4898 && (ibfd->flags & DYNAMIC) == 0
4899 && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour)
4900 elf_tdata (info->output_bfd)->has_gnu_symbols = elf_gnu_symbol_any;
4901
4902 if (*sec != NULL
4903 && strcmp ((*sec)->name, ".opd") == 0)
4904 {
4905 asection *code_sec;
4906
4907 if (!(ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC
4908 || ELF_ST_TYPE (isym->st_info) == STT_FUNC))
4909 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
4910
4911 /* If the symbol is a function defined in .opd, and the function
4912 code is in a discarded group, let it appear to be undefined. */
4913 if (!bfd_link_relocatable (info)
4914 && (*sec)->reloc_count != 0
4915 && opd_entry_value (*sec, *value, &code_sec, NULL,
4916 FALSE) != (bfd_vma) -1
4917 && discarded_section (code_sec))
4918 {
4919 *sec = bfd_und_section_ptr;
4920 isym->st_shndx = SHN_UNDEF;
4921 }
4922 }
4923 else if (*sec != NULL
4924 && strcmp ((*sec)->name, ".toc") == 0
4925 && ELF_ST_TYPE (isym->st_info) == STT_OBJECT)
4926 {
4927 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4928 if (htab != NULL)
4929 htab->params->object_in_toc = 1;
4930 }
4931
4932 if ((STO_PPC64_LOCAL_MASK & isym->st_other) != 0)
4933 {
4934 if (abiversion (ibfd) == 0)
4935 set_abiversion (ibfd, 2);
4936 else if (abiversion (ibfd) == 1)
4937 {
4938 info->callbacks->einfo (_("%P: symbol '%s' has invalid st_other"
4939 " for ABI version 1\n"), name);
4940 bfd_set_error (bfd_error_bad_value);
4941 return FALSE;
4942 }
4943 }
4944
4945 return TRUE;
4946 }
4947
4948 /* Merge non-visibility st_other attributes: local entry point. */
4949
4950 static void
4951 ppc64_elf_merge_symbol_attribute (struct elf_link_hash_entry *h,
4952 const Elf_Internal_Sym *isym,
4953 bfd_boolean definition,
4954 bfd_boolean dynamic)
4955 {
4956 if (definition && !dynamic)
4957 h->other = ((isym->st_other & ~ELF_ST_VISIBILITY (-1))
4958 | ELF_ST_VISIBILITY (h->other));
4959 }
4960
4961 /* This function makes an old ABI object reference to ".bar" cause the
4962 inclusion of a new ABI object archive that defines "bar".
4963 NAME is a symbol defined in an archive. Return a symbol in the hash
4964 table that might be satisfied by the archive symbols. */
4965
4966 static struct elf_link_hash_entry *
4967 ppc64_elf_archive_symbol_lookup (bfd *abfd,
4968 struct bfd_link_info *info,
4969 const char *name)
4970 {
4971 struct elf_link_hash_entry *h;
4972 char *dot_name;
4973 size_t len;
4974
4975 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
4976 if (h != NULL
4977 /* Don't return this sym if it is a fake function descriptor
4978 created by add_symbol_adjust. */
4979 && !(h->root.type == bfd_link_hash_undefweak
4980 && ((struct ppc_link_hash_entry *) h)->fake))
4981 return h;
4982
4983 if (name[0] == '.')
4984 return h;
4985
4986 len = strlen (name);
4987 dot_name = bfd_alloc (abfd, len + 2);
4988 if (dot_name == NULL)
4989 return (struct elf_link_hash_entry *) 0 - 1;
4990 dot_name[0] = '.';
4991 memcpy (dot_name + 1, name, len + 1);
4992 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
4993 bfd_release (abfd, dot_name);
4994 return h;
4995 }
4996
4997 /* This function satisfies all old ABI object references to ".bar" if a
4998 new ABI object defines "bar". Well, at least, undefined dot symbols
4999 are made weak. This stops later archive searches from including an
5000 object if we already have a function descriptor definition. It also
5001 prevents the linker complaining about undefined symbols.
5002 We also check and correct mismatched symbol visibility here. The
5003 most restrictive visibility of the function descriptor and the
5004 function entry symbol is used. */
5005
5006 static bfd_boolean
5007 add_symbol_adjust (struct ppc_link_hash_entry *eh, struct bfd_link_info *info)
5008 {
5009 struct ppc_link_hash_table *htab;
5010 struct ppc_link_hash_entry *fdh;
5011
5012 if (eh->elf.root.type == bfd_link_hash_indirect)
5013 return TRUE;
5014
5015 if (eh->elf.root.type == bfd_link_hash_warning)
5016 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
5017
5018 if (eh->elf.root.root.string[0] != '.')
5019 abort ();
5020
5021 htab = ppc_hash_table (info);
5022 if (htab == NULL)
5023 return FALSE;
5024
5025 fdh = lookup_fdh (eh, htab);
5026 if (fdh == NULL)
5027 {
5028 if (!bfd_link_relocatable (info)
5029 && (eh->elf.root.type == bfd_link_hash_undefined
5030 || eh->elf.root.type == bfd_link_hash_undefweak)
5031 && eh->elf.ref_regular)
5032 {
5033 /* Make an undefweak function descriptor sym, which is enough to
5034 pull in an --as-needed shared lib, but won't cause link
5035 errors. Archives are handled elsewhere. */
5036 fdh = make_fdh (info, eh);
5037 if (fdh == NULL)
5038 return FALSE;
5039 fdh->elf.ref_regular = 1;
5040 }
5041 }
5042 else
5043 {
5044 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
5045 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
5046 if (entry_vis < descr_vis)
5047 fdh->elf.other += entry_vis - descr_vis;
5048 else if (entry_vis > descr_vis)
5049 eh->elf.other += descr_vis - entry_vis;
5050
5051 if ((fdh->elf.root.type == bfd_link_hash_defined
5052 || fdh->elf.root.type == bfd_link_hash_defweak)
5053 && eh->elf.root.type == bfd_link_hash_undefined)
5054 {
5055 eh->elf.root.type = bfd_link_hash_undefweak;
5056 eh->was_undefined = 1;
5057 htab->twiddled_syms = 1;
5058 }
5059 }
5060
5061 return TRUE;
5062 }
5063
5064 /* Set up opd section info and abiversion for IBFD, and process list
5065 of dot-symbols we made in link_hash_newfunc. */
5066
5067 static bfd_boolean
5068 ppc64_elf_before_check_relocs (bfd *ibfd, struct bfd_link_info *info)
5069 {
5070 struct ppc_link_hash_table *htab;
5071 struct ppc_link_hash_entry **p, *eh;
5072 asection *opd = bfd_get_section_by_name (ibfd, ".opd");
5073
5074 if (opd != NULL && opd->size != 0)
5075 {
5076 if (abiversion (ibfd) == 0)
5077 set_abiversion (ibfd, 1);
5078 else if (abiversion (ibfd) == 2)
5079 {
5080 info->callbacks->einfo (_("%P: %B .opd not allowed in ABI"
5081 " version %d\n"),
5082 ibfd, abiversion (ibfd));
5083 bfd_set_error (bfd_error_bad_value);
5084 return FALSE;
5085 }
5086
5087 if ((ibfd->flags & DYNAMIC) == 0
5088 && (opd->flags & SEC_RELOC) != 0
5089 && opd->reloc_count != 0
5090 && !bfd_is_abs_section (opd->output_section))
5091 {
5092 /* Garbage collection needs some extra help with .opd sections.
5093 We don't want to necessarily keep everything referenced by
5094 relocs in .opd, as that would keep all functions. Instead,
5095 if we reference an .opd symbol (a function descriptor), we
5096 want to keep the function code symbol's section. This is
5097 easy for global symbols, but for local syms we need to keep
5098 information about the associated function section. */
5099 bfd_size_type amt;
5100 asection **opd_sym_map;
5101
5102 amt = OPD_NDX (opd->size) * sizeof (*opd_sym_map);
5103 opd_sym_map = bfd_zalloc (ibfd, amt);
5104 if (opd_sym_map == NULL)
5105 return FALSE;
5106 ppc64_elf_section_data (opd)->u.opd.func_sec = opd_sym_map;
5107 BFD_ASSERT (ppc64_elf_section_data (opd)->sec_type == sec_normal);
5108 ppc64_elf_section_data (opd)->sec_type = sec_opd;
5109 }
5110 }
5111
5112 if (!is_ppc64_elf (info->output_bfd))
5113 return TRUE;
5114 htab = ppc_hash_table (info);
5115 if (htab == NULL)
5116 return FALSE;
5117
5118 /* For input files without an explicit abiversion in e_flags
5119 we should have flagged any with symbol st_other bits set
5120 as ELFv1 and above flagged those with .opd as ELFv2.
5121 Set the output abiversion if not yet set, and for any input
5122 still ambiguous, take its abiversion from the output.
5123 Differences in ABI are reported later. */
5124 if (abiversion (info->output_bfd) == 0)
5125 set_abiversion (info->output_bfd, abiversion (ibfd));
5126 else if (abiversion (ibfd) == 0)
5127 set_abiversion (ibfd, abiversion (info->output_bfd));
5128
5129 p = &htab->dot_syms;
5130 while ((eh = *p) != NULL)
5131 {
5132 *p = NULL;
5133 if (&eh->elf == htab->elf.hgot)
5134 ;
5135 else if (htab->elf.hgot == NULL
5136 && strcmp (eh->elf.root.root.string, ".TOC.") == 0)
5137 htab->elf.hgot = &eh->elf;
5138 else if (!add_symbol_adjust (eh, info))
5139 return FALSE;
5140 p = &eh->u.next_dot_sym;
5141 }
5142
5143 /* Clear the list for non-ppc64 input files. */
5144 p = &htab->dot_syms;
5145 while ((eh = *p) != NULL)
5146 {
5147 *p = NULL;
5148 p = &eh->u.next_dot_sym;
5149 }
5150
5151 /* We need to fix the undefs list for any syms we have twiddled to
5152 undef_weak. */
5153 if (htab->twiddled_syms)
5154 {
5155 bfd_link_repair_undef_list (&htab->elf.root);
5156 htab->twiddled_syms = 0;
5157 }
5158 return TRUE;
5159 }
5160
5161 /* Undo hash table changes when an --as-needed input file is determined
5162 not to be needed. */
5163
5164 static bfd_boolean
5165 ppc64_elf_notice_as_needed (bfd *ibfd,
5166 struct bfd_link_info *info,
5167 enum notice_asneeded_action act)
5168 {
5169 if (act == notice_not_needed)
5170 {
5171 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5172
5173 if (htab == NULL)
5174 return FALSE;
5175
5176 htab->dot_syms = NULL;
5177 }
5178 return _bfd_elf_notice_as_needed (ibfd, info, act);
5179 }
5180
5181 /* If --just-symbols against a final linked binary, then assume we need
5182 toc adjusting stubs when calling functions defined there. */
5183
5184 static void
5185 ppc64_elf_link_just_syms (asection *sec, struct bfd_link_info *info)
5186 {
5187 if ((sec->flags & SEC_CODE) != 0
5188 && (sec->owner->flags & (EXEC_P | DYNAMIC)) != 0
5189 && is_ppc64_elf (sec->owner))
5190 {
5191 if (abiversion (sec->owner) >= 2
5192 || bfd_get_section_by_name (sec->owner, ".opd") != NULL)
5193 sec->has_toc_reloc = 1;
5194 }
5195 _bfd_elf_link_just_syms (sec, info);
5196 }
5197
5198 static struct plt_entry **
5199 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
5200 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
5201 {
5202 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
5203 struct plt_entry **local_plt;
5204 unsigned char *local_got_tls_masks;
5205
5206 if (local_got_ents == NULL)
5207 {
5208 bfd_size_type size = symtab_hdr->sh_info;
5209
5210 size *= (sizeof (*local_got_ents)
5211 + sizeof (*local_plt)
5212 + sizeof (*local_got_tls_masks));
5213 local_got_ents = bfd_zalloc (abfd, size);
5214 if (local_got_ents == NULL)
5215 return NULL;
5216 elf_local_got_ents (abfd) = local_got_ents;
5217 }
5218
5219 if ((tls_type & (PLT_IFUNC | TLS_EXPLICIT)) == 0)
5220 {
5221 struct got_entry *ent;
5222
5223 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
5224 if (ent->addend == r_addend
5225 && ent->owner == abfd
5226 && ent->tls_type == tls_type)
5227 break;
5228 if (ent == NULL)
5229 {
5230 bfd_size_type amt = sizeof (*ent);
5231 ent = bfd_alloc (abfd, amt);
5232 if (ent == NULL)
5233 return FALSE;
5234 ent->next = local_got_ents[r_symndx];
5235 ent->addend = r_addend;
5236 ent->owner = abfd;
5237 ent->tls_type = tls_type;
5238 ent->is_indirect = FALSE;
5239 ent->got.refcount = 0;
5240 local_got_ents[r_symndx] = ent;
5241 }
5242 ent->got.refcount += 1;
5243 }
5244
5245 local_plt = (struct plt_entry **) (local_got_ents + symtab_hdr->sh_info);
5246 local_got_tls_masks = (unsigned char *) (local_plt + symtab_hdr->sh_info);
5247 local_got_tls_masks[r_symndx] |= tls_type;
5248
5249 return local_plt + r_symndx;
5250 }
5251
5252 static bfd_boolean
5253 update_plt_info (bfd *abfd, struct plt_entry **plist, bfd_vma addend)
5254 {
5255 struct plt_entry *ent;
5256
5257 for (ent = *plist; ent != NULL; ent = ent->next)
5258 if (ent->addend == addend)
5259 break;
5260 if (ent == NULL)
5261 {
5262 bfd_size_type amt = sizeof (*ent);
5263 ent = bfd_alloc (abfd, amt);
5264 if (ent == NULL)
5265 return FALSE;
5266 ent->next = *plist;
5267 ent->addend = addend;
5268 ent->plt.refcount = 0;
5269 *plist = ent;
5270 }
5271 ent->plt.refcount += 1;
5272 return TRUE;
5273 }
5274
5275 static bfd_boolean
5276 is_branch_reloc (enum elf_ppc64_reloc_type r_type)
5277 {
5278 return (r_type == R_PPC64_REL24
5279 || r_type == R_PPC64_REL14
5280 || r_type == R_PPC64_REL14_BRTAKEN
5281 || r_type == R_PPC64_REL14_BRNTAKEN
5282 || r_type == R_PPC64_ADDR24
5283 || r_type == R_PPC64_ADDR14
5284 || r_type == R_PPC64_ADDR14_BRTAKEN
5285 || r_type == R_PPC64_ADDR14_BRNTAKEN);
5286 }
5287
5288 /* Look through the relocs for a section during the first phase, and
5289 calculate needed space in the global offset table, procedure
5290 linkage table, and dynamic reloc sections. */
5291
5292 static bfd_boolean
5293 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
5294 asection *sec, const Elf_Internal_Rela *relocs)
5295 {
5296 struct ppc_link_hash_table *htab;
5297 Elf_Internal_Shdr *symtab_hdr;
5298 struct elf_link_hash_entry **sym_hashes;
5299 const Elf_Internal_Rela *rel;
5300 const Elf_Internal_Rela *rel_end;
5301 asection *sreloc;
5302 asection **opd_sym_map;
5303 struct elf_link_hash_entry *tga, *dottga;
5304
5305 if (bfd_link_relocatable (info))
5306 return TRUE;
5307
5308 /* Don't do anything special with non-loaded, non-alloced sections.
5309 In particular, any relocs in such sections should not affect GOT
5310 and PLT reference counting (ie. we don't allow them to create GOT
5311 or PLT entries), there's no possibility or desire to optimize TLS
5312 relocs, and there's not much point in propagating relocs to shared
5313 libs that the dynamic linker won't relocate. */
5314 if ((sec->flags & SEC_ALLOC) == 0)
5315 return TRUE;
5316
5317 BFD_ASSERT (is_ppc64_elf (abfd));
5318
5319 htab = ppc_hash_table (info);
5320 if (htab == NULL)
5321 return FALSE;
5322
5323 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
5324 FALSE, FALSE, TRUE);
5325 dottga = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
5326 FALSE, FALSE, TRUE);
5327 symtab_hdr = &elf_symtab_hdr (abfd);
5328 sym_hashes = elf_sym_hashes (abfd);
5329 sreloc = NULL;
5330 opd_sym_map = NULL;
5331 if (ppc64_elf_section_data (sec) != NULL
5332 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
5333 opd_sym_map = ppc64_elf_section_data (sec)->u.opd.func_sec;
5334
5335 rel_end = relocs + sec->reloc_count;
5336 for (rel = relocs; rel < rel_end; rel++)
5337 {
5338 unsigned long r_symndx;
5339 struct elf_link_hash_entry *h;
5340 enum elf_ppc64_reloc_type r_type;
5341 int tls_type;
5342 struct _ppc64_elf_section_data *ppc64_sec;
5343 struct plt_entry **ifunc;
5344
5345 r_symndx = ELF64_R_SYM (rel->r_info);
5346 if (r_symndx < symtab_hdr->sh_info)
5347 h = NULL;
5348 else
5349 {
5350 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5351 h = elf_follow_link (h);
5352
5353 /* PR15323, ref flags aren't set for references in the same
5354 object. */
5355 h->root.non_ir_ref = 1;
5356
5357 if (h == htab->elf.hgot)
5358 sec->has_toc_reloc = 1;
5359 }
5360
5361 tls_type = 0;
5362 ifunc = NULL;
5363 if (h != NULL)
5364 {
5365 if (h->type == STT_GNU_IFUNC)
5366 {
5367 h->needs_plt = 1;
5368 ifunc = &h->plt.plist;
5369 }
5370 }
5371 else
5372 {
5373 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5374 abfd, r_symndx);
5375 if (isym == NULL)
5376 return FALSE;
5377
5378 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
5379 {
5380 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
5381 rel->r_addend, PLT_IFUNC);
5382 if (ifunc == NULL)
5383 return FALSE;
5384 }
5385 }
5386 r_type = ELF64_R_TYPE (rel->r_info);
5387 if (is_branch_reloc (r_type))
5388 {
5389 if (h != NULL && (h == tga || h == dottga))
5390 {
5391 if (rel != relocs
5392 && (ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSGD
5393 || ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSLD))
5394 /* We have a new-style __tls_get_addr call with a marker
5395 reloc. */
5396 ;
5397 else
5398 /* Mark this section as having an old-style call. */
5399 sec->has_tls_get_addr_call = 1;
5400 }
5401
5402 /* STT_GNU_IFUNC symbols must have a PLT entry. */
5403 if (ifunc != NULL
5404 && !update_plt_info (abfd, ifunc, rel->r_addend))
5405 return FALSE;
5406 }
5407
5408 switch (r_type)
5409 {
5410 case R_PPC64_TLSGD:
5411 case R_PPC64_TLSLD:
5412 /* These special tls relocs tie a call to __tls_get_addr with
5413 its parameter symbol. */
5414 break;
5415
5416 case R_PPC64_GOT_TLSLD16:
5417 case R_PPC64_GOT_TLSLD16_LO:
5418 case R_PPC64_GOT_TLSLD16_HI:
5419 case R_PPC64_GOT_TLSLD16_HA:
5420 tls_type = TLS_TLS | TLS_LD;
5421 goto dogottls;
5422
5423 case R_PPC64_GOT_TLSGD16:
5424 case R_PPC64_GOT_TLSGD16_LO:
5425 case R_PPC64_GOT_TLSGD16_HI:
5426 case R_PPC64_GOT_TLSGD16_HA:
5427 tls_type = TLS_TLS | TLS_GD;
5428 goto dogottls;
5429
5430 case R_PPC64_GOT_TPREL16_DS:
5431 case R_PPC64_GOT_TPREL16_LO_DS:
5432 case R_PPC64_GOT_TPREL16_HI:
5433 case R_PPC64_GOT_TPREL16_HA:
5434 if (bfd_link_pic (info))
5435 info->flags |= DF_STATIC_TLS;
5436 tls_type = TLS_TLS | TLS_TPREL;
5437 goto dogottls;
5438
5439 case R_PPC64_GOT_DTPREL16_DS:
5440 case R_PPC64_GOT_DTPREL16_LO_DS:
5441 case R_PPC64_GOT_DTPREL16_HI:
5442 case R_PPC64_GOT_DTPREL16_HA:
5443 tls_type = TLS_TLS | TLS_DTPREL;
5444 dogottls:
5445 sec->has_tls_reloc = 1;
5446 /* Fall thru */
5447
5448 case R_PPC64_GOT16:
5449 case R_PPC64_GOT16_DS:
5450 case R_PPC64_GOT16_HA:
5451 case R_PPC64_GOT16_HI:
5452 case R_PPC64_GOT16_LO:
5453 case R_PPC64_GOT16_LO_DS:
5454 /* This symbol requires a global offset table entry. */
5455 sec->has_toc_reloc = 1;
5456 if (r_type == R_PPC64_GOT_TLSLD16
5457 || r_type == R_PPC64_GOT_TLSGD16
5458 || r_type == R_PPC64_GOT_TPREL16_DS
5459 || r_type == R_PPC64_GOT_DTPREL16_DS
5460 || r_type == R_PPC64_GOT16
5461 || r_type == R_PPC64_GOT16_DS)
5462 {
5463 htab->do_multi_toc = 1;
5464 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5465 }
5466
5467 if (ppc64_elf_tdata (abfd)->got == NULL
5468 && !create_got_section (abfd, info))
5469 return FALSE;
5470
5471 if (h != NULL)
5472 {
5473 struct ppc_link_hash_entry *eh;
5474 struct got_entry *ent;
5475
5476 eh = (struct ppc_link_hash_entry *) h;
5477 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
5478 if (ent->addend == rel->r_addend
5479 && ent->owner == abfd
5480 && ent->tls_type == tls_type)
5481 break;
5482 if (ent == NULL)
5483 {
5484 bfd_size_type amt = sizeof (*ent);
5485 ent = bfd_alloc (abfd, amt);
5486 if (ent == NULL)
5487 return FALSE;
5488 ent->next = eh->elf.got.glist;
5489 ent->addend = rel->r_addend;
5490 ent->owner = abfd;
5491 ent->tls_type = tls_type;
5492 ent->is_indirect = FALSE;
5493 ent->got.refcount = 0;
5494 eh->elf.got.glist = ent;
5495 }
5496 ent->got.refcount += 1;
5497 eh->tls_mask |= tls_type;
5498 }
5499 else
5500 /* This is a global offset table entry for a local symbol. */
5501 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5502 rel->r_addend, tls_type))
5503 return FALSE;
5504
5505 /* We may also need a plt entry if the symbol turns out to be
5506 an ifunc. */
5507 if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1)
5508 {
5509 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5510 return FALSE;
5511 }
5512 break;
5513
5514 case R_PPC64_PLT16_HA:
5515 case R_PPC64_PLT16_HI:
5516 case R_PPC64_PLT16_LO:
5517 case R_PPC64_PLT32:
5518 case R_PPC64_PLT64:
5519 /* This symbol requires a procedure linkage table entry. We
5520 actually build the entry in adjust_dynamic_symbol,
5521 because this might be a case of linking PIC code without
5522 linking in any dynamic objects, in which case we don't
5523 need to generate a procedure linkage table after all. */
5524 if (h == NULL)
5525 {
5526 /* It does not make sense to have a procedure linkage
5527 table entry for a local symbol. */
5528 bfd_set_error (bfd_error_bad_value);
5529 return FALSE;
5530 }
5531 else
5532 {
5533 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5534 return FALSE;
5535 h->needs_plt = 1;
5536 if (h->root.root.string[0] == '.'
5537 && h->root.root.string[1] != '\0')
5538 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5539 }
5540 break;
5541
5542 /* The following relocations don't need to propagate the
5543 relocation if linking a shared object since they are
5544 section relative. */
5545 case R_PPC64_SECTOFF:
5546 case R_PPC64_SECTOFF_LO:
5547 case R_PPC64_SECTOFF_HI:
5548 case R_PPC64_SECTOFF_HA:
5549 case R_PPC64_SECTOFF_DS:
5550 case R_PPC64_SECTOFF_LO_DS:
5551 case R_PPC64_DTPREL16:
5552 case R_PPC64_DTPREL16_LO:
5553 case R_PPC64_DTPREL16_HI:
5554 case R_PPC64_DTPREL16_HA:
5555 case R_PPC64_DTPREL16_DS:
5556 case R_PPC64_DTPREL16_LO_DS:
5557 case R_PPC64_DTPREL16_HIGH:
5558 case R_PPC64_DTPREL16_HIGHA:
5559 case R_PPC64_DTPREL16_HIGHER:
5560 case R_PPC64_DTPREL16_HIGHERA:
5561 case R_PPC64_DTPREL16_HIGHEST:
5562 case R_PPC64_DTPREL16_HIGHESTA:
5563 break;
5564
5565 /* Nor do these. */
5566 case R_PPC64_REL16:
5567 case R_PPC64_REL16_LO:
5568 case R_PPC64_REL16_HI:
5569 case R_PPC64_REL16_HA:
5570 case R_PPC64_REL16DX_HA:
5571 break;
5572
5573 /* Not supported as a dynamic relocation. */
5574 case R_PPC64_ADDR64_LOCAL:
5575 if (bfd_link_pic (info))
5576 {
5577 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
5578 ppc_howto_init ();
5579 info->callbacks->einfo (_("%P: %H: %s reloc unsupported "
5580 "in shared libraries and PIEs.\n"),
5581 abfd, sec, rel->r_offset,
5582 ppc64_elf_howto_table[r_type]->name);
5583 bfd_set_error (bfd_error_bad_value);
5584 return FALSE;
5585 }
5586 break;
5587
5588 case R_PPC64_TOC16:
5589 case R_PPC64_TOC16_DS:
5590 htab->do_multi_toc = 1;
5591 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5592 case R_PPC64_TOC16_LO:
5593 case R_PPC64_TOC16_HI:
5594 case R_PPC64_TOC16_HA:
5595 case R_PPC64_TOC16_LO_DS:
5596 sec->has_toc_reloc = 1;
5597 break;
5598
5599 /* Marker reloc. */
5600 case R_PPC64_ENTRY:
5601 break;
5602
5603 /* This relocation describes the C++ object vtable hierarchy.
5604 Reconstruct it for later use during GC. */
5605 case R_PPC64_GNU_VTINHERIT:
5606 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
5607 return FALSE;
5608 break;
5609
5610 /* This relocation describes which C++ vtable entries are actually
5611 used. Record for later use during GC. */
5612 case R_PPC64_GNU_VTENTRY:
5613 BFD_ASSERT (h != NULL);
5614 if (h != NULL
5615 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
5616 return FALSE;
5617 break;
5618
5619 case R_PPC64_REL14:
5620 case R_PPC64_REL14_BRTAKEN:
5621 case R_PPC64_REL14_BRNTAKEN:
5622 {
5623 asection *dest = NULL;
5624
5625 /* Heuristic: If jumping outside our section, chances are
5626 we are going to need a stub. */
5627 if (h != NULL)
5628 {
5629 /* If the sym is weak it may be overridden later, so
5630 don't assume we know where a weak sym lives. */
5631 if (h->root.type == bfd_link_hash_defined)
5632 dest = h->root.u.def.section;
5633 }
5634 else
5635 {
5636 Elf_Internal_Sym *isym;
5637
5638 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5639 abfd, r_symndx);
5640 if (isym == NULL)
5641 return FALSE;
5642
5643 dest = bfd_section_from_elf_index (abfd, isym->st_shndx);
5644 }
5645
5646 if (dest != sec)
5647 ppc64_elf_section_data (sec)->has_14bit_branch = 1;
5648 }
5649 /* Fall through. */
5650
5651 case R_PPC64_REL24:
5652 if (h != NULL && ifunc == NULL)
5653 {
5654 /* We may need a .plt entry if the function this reloc
5655 refers to is in a shared lib. */
5656 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5657 return FALSE;
5658 h->needs_plt = 1;
5659 if (h->root.root.string[0] == '.'
5660 && h->root.root.string[1] != '\0')
5661 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5662 if (h == tga || h == dottga)
5663 sec->has_tls_reloc = 1;
5664 }
5665 break;
5666
5667 case R_PPC64_TPREL64:
5668 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
5669 if (bfd_link_pic (info))
5670 info->flags |= DF_STATIC_TLS;
5671 goto dotlstoc;
5672
5673 case R_PPC64_DTPMOD64:
5674 if (rel + 1 < rel_end
5675 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
5676 && rel[1].r_offset == rel->r_offset + 8)
5677 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
5678 else
5679 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
5680 goto dotlstoc;
5681
5682 case R_PPC64_DTPREL64:
5683 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
5684 if (rel != relocs
5685 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
5686 && rel[-1].r_offset == rel->r_offset - 8)
5687 /* This is the second reloc of a dtpmod, dtprel pair.
5688 Don't mark with TLS_DTPREL. */
5689 goto dodyn;
5690
5691 dotlstoc:
5692 sec->has_tls_reloc = 1;
5693 if (h != NULL)
5694 {
5695 struct ppc_link_hash_entry *eh;
5696 eh = (struct ppc_link_hash_entry *) h;
5697 eh->tls_mask |= tls_type;
5698 }
5699 else
5700 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5701 rel->r_addend, tls_type))
5702 return FALSE;
5703
5704 ppc64_sec = ppc64_elf_section_data (sec);
5705 if (ppc64_sec->sec_type != sec_toc)
5706 {
5707 bfd_size_type amt;
5708
5709 /* One extra to simplify get_tls_mask. */
5710 amt = sec->size * sizeof (unsigned) / 8 + sizeof (unsigned);
5711 ppc64_sec->u.toc.symndx = bfd_zalloc (abfd, amt);
5712 if (ppc64_sec->u.toc.symndx == NULL)
5713 return FALSE;
5714 amt = sec->size * sizeof (bfd_vma) / 8;
5715 ppc64_sec->u.toc.add = bfd_zalloc (abfd, amt);
5716 if (ppc64_sec->u.toc.add == NULL)
5717 return FALSE;
5718 BFD_ASSERT (ppc64_sec->sec_type == sec_normal);
5719 ppc64_sec->sec_type = sec_toc;
5720 }
5721 BFD_ASSERT (rel->r_offset % 8 == 0);
5722 ppc64_sec->u.toc.symndx[rel->r_offset / 8] = r_symndx;
5723 ppc64_sec->u.toc.add[rel->r_offset / 8] = rel->r_addend;
5724
5725 /* Mark the second slot of a GD or LD entry.
5726 -1 to indicate GD and -2 to indicate LD. */
5727 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
5728 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -1;
5729 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
5730 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -2;
5731 goto dodyn;
5732
5733 case R_PPC64_TPREL16:
5734 case R_PPC64_TPREL16_LO:
5735 case R_PPC64_TPREL16_HI:
5736 case R_PPC64_TPREL16_HA:
5737 case R_PPC64_TPREL16_DS:
5738 case R_PPC64_TPREL16_LO_DS:
5739 case R_PPC64_TPREL16_HIGH:
5740 case R_PPC64_TPREL16_HIGHA:
5741 case R_PPC64_TPREL16_HIGHER:
5742 case R_PPC64_TPREL16_HIGHERA:
5743 case R_PPC64_TPREL16_HIGHEST:
5744 case R_PPC64_TPREL16_HIGHESTA:
5745 if (bfd_link_pic (info))
5746 {
5747 info->flags |= DF_STATIC_TLS;
5748 goto dodyn;
5749 }
5750 break;
5751
5752 case R_PPC64_ADDR64:
5753 if (opd_sym_map != NULL
5754 && rel + 1 < rel_end
5755 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
5756 {
5757 if (h != NULL)
5758 {
5759 if (h->root.root.string[0] == '.'
5760 && h->root.root.string[1] != 0
5761 && lookup_fdh ((struct ppc_link_hash_entry *) h, htab))
5762 ;
5763 else
5764 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5765 }
5766 else
5767 {
5768 asection *s;
5769 Elf_Internal_Sym *isym;
5770
5771 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5772 abfd, r_symndx);
5773 if (isym == NULL)
5774 return FALSE;
5775
5776 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5777 if (s != NULL && s != sec)
5778 opd_sym_map[OPD_NDX (rel->r_offset)] = s;
5779 }
5780 }
5781 /* Fall through. */
5782
5783 case R_PPC64_ADDR16:
5784 case R_PPC64_ADDR16_DS:
5785 case R_PPC64_ADDR16_HA:
5786 case R_PPC64_ADDR16_HI:
5787 case R_PPC64_ADDR16_HIGH:
5788 case R_PPC64_ADDR16_HIGHA:
5789 case R_PPC64_ADDR16_HIGHER:
5790 case R_PPC64_ADDR16_HIGHERA:
5791 case R_PPC64_ADDR16_HIGHEST:
5792 case R_PPC64_ADDR16_HIGHESTA:
5793 case R_PPC64_ADDR16_LO:
5794 case R_PPC64_ADDR16_LO_DS:
5795 if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1
5796 && rel->r_addend == 0)
5797 {
5798 /* We may need a .plt entry if this reloc refers to a
5799 function in a shared lib. */
5800 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5801 return FALSE;
5802 h->pointer_equality_needed = 1;
5803 }
5804 /* Fall through. */
5805
5806 case R_PPC64_REL30:
5807 case R_PPC64_REL32:
5808 case R_PPC64_REL64:
5809 case R_PPC64_ADDR14:
5810 case R_PPC64_ADDR14_BRNTAKEN:
5811 case R_PPC64_ADDR14_BRTAKEN:
5812 case R_PPC64_ADDR24:
5813 case R_PPC64_ADDR32:
5814 case R_PPC64_UADDR16:
5815 case R_PPC64_UADDR32:
5816 case R_PPC64_UADDR64:
5817 case R_PPC64_TOC:
5818 if (h != NULL && !bfd_link_pic (info))
5819 /* We may need a copy reloc. */
5820 h->non_got_ref = 1;
5821
5822 /* Don't propagate .opd relocs. */
5823 if (NO_OPD_RELOCS && opd_sym_map != NULL)
5824 break;
5825
5826 /* If we are creating a shared library, and this is a reloc
5827 against a global symbol, or a non PC relative reloc
5828 against a local symbol, then we need to copy the reloc
5829 into the shared library. However, if we are linking with
5830 -Bsymbolic, we do not need to copy a reloc against a
5831 global symbol which is defined in an object we are
5832 including in the link (i.e., DEF_REGULAR is set). At
5833 this point we have not seen all the input files, so it is
5834 possible that DEF_REGULAR is not set now but will be set
5835 later (it is never cleared). In case of a weak definition,
5836 DEF_REGULAR may be cleared later by a strong definition in
5837 a shared library. We account for that possibility below by
5838 storing information in the dyn_relocs field of the hash
5839 table entry. A similar situation occurs when creating
5840 shared libraries and symbol visibility changes render the
5841 symbol local.
5842
5843 If on the other hand, we are creating an executable, we
5844 may need to keep relocations for symbols satisfied by a
5845 dynamic library if we manage to avoid copy relocs for the
5846 symbol. */
5847 dodyn:
5848 if ((bfd_link_pic (info)
5849 && (must_be_dyn_reloc (info, r_type)
5850 || (h != NULL
5851 && (!SYMBOLIC_BIND (info, h)
5852 || h->root.type == bfd_link_hash_defweak
5853 || !h->def_regular))))
5854 || (ELIMINATE_COPY_RELOCS
5855 && !bfd_link_pic (info)
5856 && h != NULL
5857 && (h->root.type == bfd_link_hash_defweak
5858 || !h->def_regular))
5859 || (!bfd_link_pic (info)
5860 && ifunc != NULL))
5861 {
5862 /* We must copy these reloc types into the output file.
5863 Create a reloc section in dynobj and make room for
5864 this reloc. */
5865 if (sreloc == NULL)
5866 {
5867 sreloc = _bfd_elf_make_dynamic_reloc_section
5868 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
5869
5870 if (sreloc == NULL)
5871 return FALSE;
5872 }
5873
5874 /* If this is a global symbol, we count the number of
5875 relocations we need for this symbol. */
5876 if (h != NULL)
5877 {
5878 struct elf_dyn_relocs *p;
5879 struct elf_dyn_relocs **head;
5880
5881 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
5882 p = *head;
5883 if (p == NULL || p->sec != sec)
5884 {
5885 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5886 if (p == NULL)
5887 return FALSE;
5888 p->next = *head;
5889 *head = p;
5890 p->sec = sec;
5891 p->count = 0;
5892 p->pc_count = 0;
5893 }
5894 p->count += 1;
5895 if (!must_be_dyn_reloc (info, r_type))
5896 p->pc_count += 1;
5897 }
5898 else
5899 {
5900 /* Track dynamic relocs needed for local syms too.
5901 We really need local syms available to do this
5902 easily. Oh well. */
5903 struct ppc_dyn_relocs *p;
5904 struct ppc_dyn_relocs **head;
5905 bfd_boolean is_ifunc;
5906 asection *s;
5907 void *vpp;
5908 Elf_Internal_Sym *isym;
5909
5910 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5911 abfd, r_symndx);
5912 if (isym == NULL)
5913 return FALSE;
5914
5915 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5916 if (s == NULL)
5917 s = sec;
5918
5919 vpp = &elf_section_data (s)->local_dynrel;
5920 head = (struct ppc_dyn_relocs **) vpp;
5921 is_ifunc = ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC;
5922 p = *head;
5923 if (p != NULL && p->sec == sec && p->ifunc != is_ifunc)
5924 p = p->next;
5925 if (p == NULL || p->sec != sec || p->ifunc != is_ifunc)
5926 {
5927 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5928 if (p == NULL)
5929 return FALSE;
5930 p->next = *head;
5931 *head = p;
5932 p->sec = sec;
5933 p->ifunc = is_ifunc;
5934 p->count = 0;
5935 }
5936 p->count += 1;
5937 }
5938 }
5939 break;
5940
5941 default:
5942 break;
5943 }
5944 }
5945
5946 return TRUE;
5947 }
5948
5949 /* Merge backend specific data from an object file to the output
5950 object file when linking. */
5951
5952 static bfd_boolean
5953 ppc64_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
5954 {
5955 unsigned long iflags, oflags;
5956
5957 if ((ibfd->flags & BFD_LINKER_CREATED) != 0)
5958 return TRUE;
5959
5960 if (!is_ppc64_elf (ibfd) || !is_ppc64_elf (obfd))
5961 return TRUE;
5962
5963 if (!_bfd_generic_verify_endian_match (ibfd, obfd))
5964 return FALSE;
5965
5966 iflags = elf_elfheader (ibfd)->e_flags;
5967 oflags = elf_elfheader (obfd)->e_flags;
5968
5969 if (iflags & ~EF_PPC64_ABI)
5970 {
5971 (*_bfd_error_handler)
5972 (_("%B uses unknown e_flags 0x%lx"), ibfd, iflags);
5973 bfd_set_error (bfd_error_bad_value);
5974 return FALSE;
5975 }
5976 else if (iflags != oflags && iflags != 0)
5977 {
5978 (*_bfd_error_handler)
5979 (_("%B: ABI version %ld is not compatible with ABI version %ld output"),
5980 ibfd, iflags, oflags);
5981 bfd_set_error (bfd_error_bad_value);
5982 return FALSE;
5983 }
5984
5985 /* Merge Tag_compatibility attributes and any common GNU ones. */
5986 _bfd_elf_merge_object_attributes (ibfd, obfd);
5987
5988 return TRUE;
5989 }
5990
5991 static bfd_boolean
5992 ppc64_elf_print_private_bfd_data (bfd *abfd, void *ptr)
5993 {
5994 /* Print normal ELF private data. */
5995 _bfd_elf_print_private_bfd_data (abfd, ptr);
5996
5997 if (elf_elfheader (abfd)->e_flags != 0)
5998 {
5999 FILE *file = ptr;
6000
6001 /* xgettext:c-format */
6002 fprintf (file, _("private flags = 0x%lx:"),
6003 elf_elfheader (abfd)->e_flags);
6004
6005 if ((elf_elfheader (abfd)->e_flags & EF_PPC64_ABI) != 0)
6006 fprintf (file, _(" [abiv%ld]"),
6007 elf_elfheader (abfd)->e_flags & EF_PPC64_ABI);
6008 fputc ('\n', file);
6009 }
6010
6011 return TRUE;
6012 }
6013
6014 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
6015 of the code entry point, and its section, which must be in the same
6016 object as OPD_SEC. Returns (bfd_vma) -1 on error. */
6017
6018 static bfd_vma
6019 opd_entry_value (asection *opd_sec,
6020 bfd_vma offset,
6021 asection **code_sec,
6022 bfd_vma *code_off,
6023 bfd_boolean in_code_sec)
6024 {
6025 bfd *opd_bfd = opd_sec->owner;
6026 Elf_Internal_Rela *relocs;
6027 Elf_Internal_Rela *lo, *hi, *look;
6028 bfd_vma val;
6029
6030 /* No relocs implies we are linking a --just-symbols object, or looking
6031 at a final linked executable with addr2line or somesuch. */
6032 if (opd_sec->reloc_count == 0)
6033 {
6034 bfd_byte *contents = ppc64_elf_tdata (opd_bfd)->opd.contents;
6035
6036 if (contents == NULL)
6037 {
6038 if (!bfd_malloc_and_get_section (opd_bfd, opd_sec, &contents))
6039 return (bfd_vma) -1;
6040 ppc64_elf_tdata (opd_bfd)->opd.contents = contents;
6041 }
6042
6043 /* PR 17512: file: 64b9dfbb. */
6044 if (offset + 7 >= opd_sec->size || offset + 7 < offset)
6045 return (bfd_vma) -1;
6046
6047 val = bfd_get_64 (opd_bfd, contents + offset);
6048 if (code_sec != NULL)
6049 {
6050 asection *sec, *likely = NULL;
6051
6052 if (in_code_sec)
6053 {
6054 sec = *code_sec;
6055 if (sec->vma <= val
6056 && val < sec->vma + sec->size)
6057 likely = sec;
6058 else
6059 val = -1;
6060 }
6061 else
6062 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
6063 if (sec->vma <= val
6064 && (sec->flags & SEC_LOAD) != 0
6065 && (sec->flags & SEC_ALLOC) != 0)
6066 likely = sec;
6067 if (likely != NULL)
6068 {
6069 *code_sec = likely;
6070 if (code_off != NULL)
6071 *code_off = val - likely->vma;
6072 }
6073 }
6074 return val;
6075 }
6076
6077 BFD_ASSERT (is_ppc64_elf (opd_bfd));
6078
6079 relocs = ppc64_elf_tdata (opd_bfd)->opd.relocs;
6080 if (relocs == NULL)
6081 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
6082 /* PR 17512: file: df8e1fd6. */
6083 if (relocs == NULL)
6084 return (bfd_vma) -1;
6085
6086 /* Go find the opd reloc at the sym address. */
6087 lo = relocs;
6088 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
6089 val = (bfd_vma) -1;
6090 while (lo < hi)
6091 {
6092 look = lo + (hi - lo) / 2;
6093 if (look->r_offset < offset)
6094 lo = look + 1;
6095 else if (look->r_offset > offset)
6096 hi = look;
6097 else
6098 {
6099 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (opd_bfd);
6100
6101 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
6102 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
6103 {
6104 unsigned long symndx = ELF64_R_SYM (look->r_info);
6105 asection *sec = NULL;
6106
6107 if (symndx >= symtab_hdr->sh_info
6108 && elf_sym_hashes (opd_bfd) != NULL)
6109 {
6110 struct elf_link_hash_entry **sym_hashes;
6111 struct elf_link_hash_entry *rh;
6112
6113 sym_hashes = elf_sym_hashes (opd_bfd);
6114 rh = sym_hashes[symndx - symtab_hdr->sh_info];
6115 if (rh != NULL)
6116 {
6117 rh = elf_follow_link (rh);
6118 if (rh->root.type != bfd_link_hash_defined
6119 && rh->root.type != bfd_link_hash_defweak)
6120 break;
6121 if (rh->root.u.def.section->owner == opd_bfd)
6122 {
6123 val = rh->root.u.def.value;
6124 sec = rh->root.u.def.section;
6125 }
6126 }
6127 }
6128
6129 if (sec == NULL)
6130 {
6131 Elf_Internal_Sym *sym;
6132
6133 if (symndx < symtab_hdr->sh_info)
6134 {
6135 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
6136 if (sym == NULL)
6137 {
6138 size_t symcnt = symtab_hdr->sh_info;
6139 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
6140 symcnt, 0,
6141 NULL, NULL, NULL);
6142 if (sym == NULL)
6143 break;
6144 symtab_hdr->contents = (bfd_byte *) sym;
6145 }
6146 sym += symndx;
6147 }
6148 else
6149 {
6150 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
6151 1, symndx,
6152 NULL, NULL, NULL);
6153 if (sym == NULL)
6154 break;
6155 }
6156 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
6157 if (sec == NULL)
6158 break;
6159 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
6160 val = sym->st_value;
6161 }
6162
6163 val += look->r_addend;
6164 if (code_off != NULL)
6165 *code_off = val;
6166 if (code_sec != NULL)
6167 {
6168 if (in_code_sec && *code_sec != sec)
6169 return -1;
6170 else
6171 *code_sec = sec;
6172 }
6173 if (sec->output_section != NULL)
6174 val += sec->output_section->vma + sec->output_offset;
6175 }
6176 break;
6177 }
6178 }
6179
6180 return val;
6181 }
6182
6183 /* If the ELF symbol SYM might be a function in SEC, return the
6184 function size and set *CODE_OFF to the function's entry point,
6185 otherwise return zero. */
6186
6187 static bfd_size_type
6188 ppc64_elf_maybe_function_sym (const asymbol *sym, asection *sec,
6189 bfd_vma *code_off)
6190 {
6191 bfd_size_type size;
6192
6193 if ((sym->flags & (BSF_SECTION_SYM | BSF_FILE | BSF_OBJECT
6194 | BSF_THREAD_LOCAL | BSF_RELC | BSF_SRELC)) != 0)
6195 return 0;
6196
6197 size = 0;
6198 if (!(sym->flags & BSF_SYNTHETIC))
6199 size = ((elf_symbol_type *) sym)->internal_elf_sym.st_size;
6200
6201 if (strcmp (sym->section->name, ".opd") == 0)
6202 {
6203 struct _opd_sec_data *opd = get_opd_info (sym->section);
6204 bfd_vma symval = sym->value;
6205
6206 if (opd != NULL
6207 && opd->adjust != NULL
6208 && elf_section_data (sym->section)->relocs != NULL)
6209 {
6210 /* opd_entry_value will use cached relocs that have been
6211 adjusted, but with raw symbols. That means both local
6212 and global symbols need adjusting. */
6213 long adjust = opd->adjust[OPD_NDX (symval)];
6214 if (adjust == -1)
6215 return 0;
6216 symval += adjust;
6217 }
6218
6219 if (opd_entry_value (sym->section, symval,
6220 &sec, code_off, TRUE) == (bfd_vma) -1)
6221 return 0;
6222 /* An old ABI binary with dot-syms has a size of 24 on the .opd
6223 symbol. This size has nothing to do with the code size of the
6224 function, which is what we're supposed to return, but the
6225 code size isn't available without looking up the dot-sym.
6226 However, doing that would be a waste of time particularly
6227 since elf_find_function will look at the dot-sym anyway.
6228 Now, elf_find_function will keep the largest size of any
6229 function sym found at the code address of interest, so return
6230 1 here to avoid it incorrectly caching a larger function size
6231 for a small function. This does mean we return the wrong
6232 size for a new-ABI function of size 24, but all that does is
6233 disable caching for such functions. */
6234 if (size == 24)
6235 size = 1;
6236 }
6237 else
6238 {
6239 if (sym->section != sec)
6240 return 0;
6241 *code_off = sym->value;
6242 }
6243 if (size == 0)
6244 size = 1;
6245 return size;
6246 }
6247
6248 /* Return true if symbol is defined in a regular object file. */
6249
6250 static bfd_boolean
6251 is_static_defined (struct elf_link_hash_entry *h)
6252 {
6253 return ((h->root.type == bfd_link_hash_defined
6254 || h->root.type == bfd_link_hash_defweak)
6255 && h->root.u.def.section != NULL
6256 && h->root.u.def.section->output_section != NULL);
6257 }
6258
6259 /* If FDH is a function descriptor symbol, return the associated code
6260 entry symbol if it is defined. Return NULL otherwise. */
6261
6262 static struct ppc_link_hash_entry *
6263 defined_code_entry (struct ppc_link_hash_entry *fdh)
6264 {
6265 if (fdh->is_func_descriptor)
6266 {
6267 struct ppc_link_hash_entry *fh = ppc_follow_link (fdh->oh);
6268 if (fh->elf.root.type == bfd_link_hash_defined
6269 || fh->elf.root.type == bfd_link_hash_defweak)
6270 return fh;
6271 }
6272 return NULL;
6273 }
6274
6275 /* If FH is a function code entry symbol, return the associated
6276 function descriptor symbol if it is defined. Return NULL otherwise. */
6277
6278 static struct ppc_link_hash_entry *
6279 defined_func_desc (struct ppc_link_hash_entry *fh)
6280 {
6281 if (fh->oh != NULL
6282 && fh->oh->is_func_descriptor)
6283 {
6284 struct ppc_link_hash_entry *fdh = ppc_follow_link (fh->oh);
6285 if (fdh->elf.root.type == bfd_link_hash_defined
6286 || fdh->elf.root.type == bfd_link_hash_defweak)
6287 return fdh;
6288 }
6289 return NULL;
6290 }
6291
6292 /* Mark all our entry sym sections, both opd and code section. */
6293
6294 static void
6295 ppc64_elf_gc_keep (struct bfd_link_info *info)
6296 {
6297 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6298 struct bfd_sym_chain *sym;
6299
6300 if (htab == NULL)
6301 return;
6302
6303 for (sym = info->gc_sym_list; sym != NULL; sym = sym->next)
6304 {
6305 struct ppc_link_hash_entry *eh, *fh;
6306 asection *sec;
6307
6308 eh = (struct ppc_link_hash_entry *)
6309 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, TRUE);
6310 if (eh == NULL)
6311 continue;
6312 if (eh->elf.root.type != bfd_link_hash_defined
6313 && eh->elf.root.type != bfd_link_hash_defweak)
6314 continue;
6315
6316 fh = defined_code_entry (eh);
6317 if (fh != NULL)
6318 {
6319 sec = fh->elf.root.u.def.section;
6320 sec->flags |= SEC_KEEP;
6321 }
6322 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6323 && opd_entry_value (eh->elf.root.u.def.section,
6324 eh->elf.root.u.def.value,
6325 &sec, NULL, FALSE) != (bfd_vma) -1)
6326 sec->flags |= SEC_KEEP;
6327
6328 sec = eh->elf.root.u.def.section;
6329 sec->flags |= SEC_KEEP;
6330 }
6331 }
6332
6333 /* Mark sections containing dynamically referenced symbols. When
6334 building shared libraries, we must assume that any visible symbol is
6335 referenced. */
6336
6337 static bfd_boolean
6338 ppc64_elf_gc_mark_dynamic_ref (struct elf_link_hash_entry *h, void *inf)
6339 {
6340 struct bfd_link_info *info = (struct bfd_link_info *) inf;
6341 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
6342 struct ppc_link_hash_entry *fdh;
6343 struct bfd_elf_dynamic_list *d = info->dynamic_list;
6344
6345 /* Dynamic linking info is on the func descriptor sym. */
6346 fdh = defined_func_desc (eh);
6347 if (fdh != NULL)
6348 eh = fdh;
6349
6350 if ((eh->elf.root.type == bfd_link_hash_defined
6351 || eh->elf.root.type == bfd_link_hash_defweak)
6352 && (eh->elf.ref_dynamic
6353 || ((eh->elf.def_regular || ELF_COMMON_DEF_P (&eh->elf))
6354 && ELF_ST_VISIBILITY (eh->elf.other) != STV_INTERNAL
6355 && ELF_ST_VISIBILITY (eh->elf.other) != STV_HIDDEN
6356 && (!bfd_link_executable (info)
6357 || info->export_dynamic
6358 || (eh->elf.dynamic
6359 && d != NULL
6360 && (*d->match) (&d->head, NULL, eh->elf.root.root.string)))
6361 && (strchr (eh->elf.root.root.string, ELF_VER_CHR) != NULL
6362 || !bfd_hide_sym_by_version (info->version_info,
6363 eh->elf.root.root.string)))))
6364 {
6365 asection *code_sec;
6366 struct ppc_link_hash_entry *fh;
6367
6368 eh->elf.root.u.def.section->flags |= SEC_KEEP;
6369
6370 /* Function descriptor syms cause the associated
6371 function code sym section to be marked. */
6372 fh = defined_code_entry (eh);
6373 if (fh != NULL)
6374 {
6375 code_sec = fh->elf.root.u.def.section;
6376 code_sec->flags |= SEC_KEEP;
6377 }
6378 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6379 && opd_entry_value (eh->elf.root.u.def.section,
6380 eh->elf.root.u.def.value,
6381 &code_sec, NULL, FALSE) != (bfd_vma) -1)
6382 code_sec->flags |= SEC_KEEP;
6383 }
6384
6385 return TRUE;
6386 }
6387
6388 /* Return the section that should be marked against GC for a given
6389 relocation. */
6390
6391 static asection *
6392 ppc64_elf_gc_mark_hook (asection *sec,
6393 struct bfd_link_info *info,
6394 Elf_Internal_Rela *rel,
6395 struct elf_link_hash_entry *h,
6396 Elf_Internal_Sym *sym)
6397 {
6398 asection *rsec;
6399
6400 /* Syms return NULL if we're marking .opd, so we avoid marking all
6401 function sections, as all functions are referenced in .opd. */
6402 rsec = NULL;
6403 if (get_opd_info (sec) != NULL)
6404 return rsec;
6405
6406 if (h != NULL)
6407 {
6408 enum elf_ppc64_reloc_type r_type;
6409 struct ppc_link_hash_entry *eh, *fh, *fdh;
6410
6411 r_type = ELF64_R_TYPE (rel->r_info);
6412 switch (r_type)
6413 {
6414 case R_PPC64_GNU_VTINHERIT:
6415 case R_PPC64_GNU_VTENTRY:
6416 break;
6417
6418 default:
6419 switch (h->root.type)
6420 {
6421 case bfd_link_hash_defined:
6422 case bfd_link_hash_defweak:
6423 eh = (struct ppc_link_hash_entry *) h;
6424 fdh = defined_func_desc (eh);
6425 if (fdh != NULL)
6426 eh = fdh;
6427
6428 /* Function descriptor syms cause the associated
6429 function code sym section to be marked. */
6430 fh = defined_code_entry (eh);
6431 if (fh != NULL)
6432 {
6433 /* They also mark their opd section. */
6434 eh->elf.root.u.def.section->gc_mark = 1;
6435
6436 rsec = fh->elf.root.u.def.section;
6437 }
6438 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6439 && opd_entry_value (eh->elf.root.u.def.section,
6440 eh->elf.root.u.def.value,
6441 &rsec, NULL, FALSE) != (bfd_vma) -1)
6442 eh->elf.root.u.def.section->gc_mark = 1;
6443 else
6444 rsec = h->root.u.def.section;
6445 break;
6446
6447 case bfd_link_hash_common:
6448 rsec = h->root.u.c.p->section;
6449 break;
6450
6451 default:
6452 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
6453 }
6454 }
6455 }
6456 else
6457 {
6458 struct _opd_sec_data *opd;
6459
6460 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
6461 opd = get_opd_info (rsec);
6462 if (opd != NULL && opd->func_sec != NULL)
6463 {
6464 rsec->gc_mark = 1;
6465
6466 rsec = opd->func_sec[OPD_NDX (sym->st_value + rel->r_addend)];
6467 }
6468 }
6469
6470 return rsec;
6471 }
6472
6473 /* Update the .got, .plt. and dynamic reloc reference counts for the
6474 section being removed. */
6475
6476 static bfd_boolean
6477 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
6478 asection *sec, const Elf_Internal_Rela *relocs)
6479 {
6480 struct ppc_link_hash_table *htab;
6481 Elf_Internal_Shdr *symtab_hdr;
6482 struct elf_link_hash_entry **sym_hashes;
6483 struct got_entry **local_got_ents;
6484 const Elf_Internal_Rela *rel, *relend;
6485
6486 if (bfd_link_relocatable (info))
6487 return TRUE;
6488
6489 if ((sec->flags & SEC_ALLOC) == 0)
6490 return TRUE;
6491
6492 elf_section_data (sec)->local_dynrel = NULL;
6493
6494 htab = ppc_hash_table (info);
6495 if (htab == NULL)
6496 return FALSE;
6497
6498 symtab_hdr = &elf_symtab_hdr (abfd);
6499 sym_hashes = elf_sym_hashes (abfd);
6500 local_got_ents = elf_local_got_ents (abfd);
6501
6502 relend = relocs + sec->reloc_count;
6503 for (rel = relocs; rel < relend; rel++)
6504 {
6505 unsigned long r_symndx;
6506 enum elf_ppc64_reloc_type r_type;
6507 struct elf_link_hash_entry *h = NULL;
6508 unsigned char tls_type = 0;
6509
6510 r_symndx = ELF64_R_SYM (rel->r_info);
6511 r_type = ELF64_R_TYPE (rel->r_info);
6512 if (r_symndx >= symtab_hdr->sh_info)
6513 {
6514 struct ppc_link_hash_entry *eh;
6515 struct elf_dyn_relocs **pp;
6516 struct elf_dyn_relocs *p;
6517
6518 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
6519 h = elf_follow_link (h);
6520 eh = (struct ppc_link_hash_entry *) h;
6521
6522 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
6523 if (p->sec == sec)
6524 {
6525 /* Everything must go for SEC. */
6526 *pp = p->next;
6527 break;
6528 }
6529 }
6530
6531 if (is_branch_reloc (r_type))
6532 {
6533 struct plt_entry **ifunc = NULL;
6534 if (h != NULL)
6535 {
6536 if (h->type == STT_GNU_IFUNC)
6537 ifunc = &h->plt.plist;
6538 }
6539 else if (local_got_ents != NULL)
6540 {
6541 struct plt_entry **local_plt = (struct plt_entry **)
6542 (local_got_ents + symtab_hdr->sh_info);
6543 unsigned char *local_got_tls_masks = (unsigned char *)
6544 (local_plt + symtab_hdr->sh_info);
6545 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
6546 ifunc = local_plt + r_symndx;
6547 }
6548 if (ifunc != NULL)
6549 {
6550 struct plt_entry *ent;
6551
6552 for (ent = *ifunc; ent != NULL; ent = ent->next)
6553 if (ent->addend == rel->r_addend)
6554 break;
6555 if (ent == NULL)
6556 abort ();
6557 if (ent->plt.refcount > 0)
6558 ent->plt.refcount -= 1;
6559 continue;
6560 }
6561 }
6562
6563 switch (r_type)
6564 {
6565 case R_PPC64_GOT_TLSLD16:
6566 case R_PPC64_GOT_TLSLD16_LO:
6567 case R_PPC64_GOT_TLSLD16_HI:
6568 case R_PPC64_GOT_TLSLD16_HA:
6569 tls_type = TLS_TLS | TLS_LD;
6570 goto dogot;
6571
6572 case R_PPC64_GOT_TLSGD16:
6573 case R_PPC64_GOT_TLSGD16_LO:
6574 case R_PPC64_GOT_TLSGD16_HI:
6575 case R_PPC64_GOT_TLSGD16_HA:
6576 tls_type = TLS_TLS | TLS_GD;
6577 goto dogot;
6578
6579 case R_PPC64_GOT_TPREL16_DS:
6580 case R_PPC64_GOT_TPREL16_LO_DS:
6581 case R_PPC64_GOT_TPREL16_HI:
6582 case R_PPC64_GOT_TPREL16_HA:
6583 tls_type = TLS_TLS | TLS_TPREL;
6584 goto dogot;
6585
6586 case R_PPC64_GOT_DTPREL16_DS:
6587 case R_PPC64_GOT_DTPREL16_LO_DS:
6588 case R_PPC64_GOT_DTPREL16_HI:
6589 case R_PPC64_GOT_DTPREL16_HA:
6590 tls_type = TLS_TLS | TLS_DTPREL;
6591 goto dogot;
6592
6593 case R_PPC64_GOT16:
6594 case R_PPC64_GOT16_DS:
6595 case R_PPC64_GOT16_HA:
6596 case R_PPC64_GOT16_HI:
6597 case R_PPC64_GOT16_LO:
6598 case R_PPC64_GOT16_LO_DS:
6599 dogot:
6600 {
6601 struct got_entry *ent;
6602
6603 if (h != NULL)
6604 ent = h->got.glist;
6605 else
6606 ent = local_got_ents[r_symndx];
6607
6608 for (; ent != NULL; ent = ent->next)
6609 if (ent->addend == rel->r_addend
6610 && ent->owner == abfd
6611 && ent->tls_type == tls_type)
6612 break;
6613 if (ent == NULL)
6614 abort ();
6615 if (ent->got.refcount > 0)
6616 ent->got.refcount -= 1;
6617 }
6618 break;
6619
6620 case R_PPC64_PLT16_HA:
6621 case R_PPC64_PLT16_HI:
6622 case R_PPC64_PLT16_LO:
6623 case R_PPC64_PLT32:
6624 case R_PPC64_PLT64:
6625 case R_PPC64_REL14:
6626 case R_PPC64_REL14_BRNTAKEN:
6627 case R_PPC64_REL14_BRTAKEN:
6628 case R_PPC64_REL24:
6629 if (h != NULL)
6630 {
6631 struct plt_entry *ent;
6632
6633 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6634 if (ent->addend == rel->r_addend)
6635 break;
6636 if (ent != NULL && ent->plt.refcount > 0)
6637 ent->plt.refcount -= 1;
6638 }
6639 break;
6640
6641 default:
6642 break;
6643 }
6644 }
6645 return TRUE;
6646 }
6647
6648 /* The maximum size of .sfpr. */
6649 #define SFPR_MAX (218*4)
6650
6651 struct sfpr_def_parms
6652 {
6653 const char name[12];
6654 unsigned char lo, hi;
6655 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
6656 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
6657 };
6658
6659 /* Auto-generate _save*, _rest* functions in .sfpr.
6660 If STUB_SEC is non-null, define alias symbols in STUB_SEC
6661 instead. */
6662
6663 static bfd_boolean
6664 sfpr_define (struct bfd_link_info *info,
6665 const struct sfpr_def_parms *parm,
6666 asection *stub_sec)
6667 {
6668 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6669 unsigned int i;
6670 size_t len = strlen (parm->name);
6671 bfd_boolean writing = FALSE;
6672 char sym[16];
6673
6674 if (htab == NULL)
6675 return FALSE;
6676
6677 memcpy (sym, parm->name, len);
6678 sym[len + 2] = 0;
6679
6680 for (i = parm->lo; i <= parm->hi; i++)
6681 {
6682 struct ppc_link_hash_entry *h;
6683
6684 sym[len + 0] = i / 10 + '0';
6685 sym[len + 1] = i % 10 + '0';
6686 h = (struct ppc_link_hash_entry *)
6687 elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
6688 if (stub_sec != NULL)
6689 {
6690 if (h != NULL
6691 && h->elf.root.type == bfd_link_hash_defined
6692 && h->elf.root.u.def.section == htab->sfpr)
6693 {
6694 struct elf_link_hash_entry *s;
6695 char buf[32];
6696 sprintf (buf, "%08x.%s", stub_sec->id & 0xffffffff, sym);
6697 s = elf_link_hash_lookup (&htab->elf, buf, TRUE, TRUE, FALSE);
6698 if (s == NULL)
6699 return FALSE;
6700 if (s->root.type == bfd_link_hash_new
6701 || (s->root.type = bfd_link_hash_defined
6702 && s->root.u.def.section == stub_sec))
6703 {
6704 s->root.type = bfd_link_hash_defined;
6705 s->root.u.def.section = stub_sec;
6706 s->root.u.def.value = (stub_sec->size
6707 + h->elf.root.u.def.value);
6708 s->ref_regular = 1;
6709 s->def_regular = 1;
6710 s->ref_regular_nonweak = 1;
6711 s->forced_local = 1;
6712 s->non_elf = 0;
6713 s->root.linker_def = 1;
6714 }
6715 }
6716 continue;
6717 }
6718 if (h != NULL)
6719 {
6720 h->save_res = 1;
6721 if (!h->elf.def_regular)
6722 {
6723 h->elf.root.type = bfd_link_hash_defined;
6724 h->elf.root.u.def.section = htab->sfpr;
6725 h->elf.root.u.def.value = htab->sfpr->size;
6726 h->elf.type = STT_FUNC;
6727 h->elf.def_regular = 1;
6728 _bfd_elf_link_hash_hide_symbol (info, &h->elf, TRUE);
6729 writing = TRUE;
6730 if (htab->sfpr->contents == NULL)
6731 {
6732 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
6733 if (htab->sfpr->contents == NULL)
6734 return FALSE;
6735 }
6736 }
6737 }
6738 if (writing)
6739 {
6740 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
6741 if (i != parm->hi)
6742 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
6743 else
6744 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
6745 htab->sfpr->size = p - htab->sfpr->contents;
6746 }
6747 }
6748
6749 return TRUE;
6750 }
6751
6752 static bfd_byte *
6753 savegpr0 (bfd *abfd, bfd_byte *p, int r)
6754 {
6755 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6756 return p + 4;
6757 }
6758
6759 static bfd_byte *
6760 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
6761 {
6762 p = savegpr0 (abfd, p, r);
6763 bfd_put_32 (abfd, STD_R0_0R1 + STK_LR, p);
6764 p = p + 4;
6765 bfd_put_32 (abfd, BLR, p);
6766 return p + 4;
6767 }
6768
6769 static bfd_byte *
6770 restgpr0 (bfd *abfd, bfd_byte *p, int r)
6771 {
6772 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6773 return p + 4;
6774 }
6775
6776 static bfd_byte *
6777 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
6778 {
6779 bfd_put_32 (abfd, LD_R0_0R1 + STK_LR, p);
6780 p = p + 4;
6781 p = restgpr0 (abfd, p, r);
6782 bfd_put_32 (abfd, MTLR_R0, p);
6783 p = p + 4;
6784 if (r == 29)
6785 {
6786 p = restgpr0 (abfd, p, 30);
6787 p = restgpr0 (abfd, p, 31);
6788 }
6789 bfd_put_32 (abfd, BLR, p);
6790 return p + 4;
6791 }
6792
6793 static bfd_byte *
6794 savegpr1 (bfd *abfd, bfd_byte *p, int r)
6795 {
6796 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6797 return p + 4;
6798 }
6799
6800 static bfd_byte *
6801 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
6802 {
6803 p = savegpr1 (abfd, p, r);
6804 bfd_put_32 (abfd, BLR, p);
6805 return p + 4;
6806 }
6807
6808 static bfd_byte *
6809 restgpr1 (bfd *abfd, bfd_byte *p, int r)
6810 {
6811 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6812 return p + 4;
6813 }
6814
6815 static bfd_byte *
6816 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
6817 {
6818 p = restgpr1 (abfd, p, r);
6819 bfd_put_32 (abfd, BLR, p);
6820 return p + 4;
6821 }
6822
6823 static bfd_byte *
6824 savefpr (bfd *abfd, bfd_byte *p, int r)
6825 {
6826 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6827 return p + 4;
6828 }
6829
6830 static bfd_byte *
6831 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
6832 {
6833 p = savefpr (abfd, p, r);
6834 bfd_put_32 (abfd, STD_R0_0R1 + STK_LR, p);
6835 p = p + 4;
6836 bfd_put_32 (abfd, BLR, p);
6837 return p + 4;
6838 }
6839
6840 static bfd_byte *
6841 restfpr (bfd *abfd, bfd_byte *p, int r)
6842 {
6843 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6844 return p + 4;
6845 }
6846
6847 static bfd_byte *
6848 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
6849 {
6850 bfd_put_32 (abfd, LD_R0_0R1 + STK_LR, p);
6851 p = p + 4;
6852 p = restfpr (abfd, p, r);
6853 bfd_put_32 (abfd, MTLR_R0, p);
6854 p = p + 4;
6855 if (r == 29)
6856 {
6857 p = restfpr (abfd, p, 30);
6858 p = restfpr (abfd, p, 31);
6859 }
6860 bfd_put_32 (abfd, BLR, p);
6861 return p + 4;
6862 }
6863
6864 static bfd_byte *
6865 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
6866 {
6867 p = savefpr (abfd, p, r);
6868 bfd_put_32 (abfd, BLR, p);
6869 return p + 4;
6870 }
6871
6872 static bfd_byte *
6873 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
6874 {
6875 p = restfpr (abfd, p, r);
6876 bfd_put_32 (abfd, BLR, p);
6877 return p + 4;
6878 }
6879
6880 static bfd_byte *
6881 savevr (bfd *abfd, bfd_byte *p, int r)
6882 {
6883 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6884 p = p + 4;
6885 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
6886 return p + 4;
6887 }
6888
6889 static bfd_byte *
6890 savevr_tail (bfd *abfd, bfd_byte *p, int r)
6891 {
6892 p = savevr (abfd, p, r);
6893 bfd_put_32 (abfd, BLR, p);
6894 return p + 4;
6895 }
6896
6897 static bfd_byte *
6898 restvr (bfd *abfd, bfd_byte *p, int r)
6899 {
6900 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6901 p = p + 4;
6902 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
6903 return p + 4;
6904 }
6905
6906 static bfd_byte *
6907 restvr_tail (bfd *abfd, bfd_byte *p, int r)
6908 {
6909 p = restvr (abfd, p, r);
6910 bfd_put_32 (abfd, BLR, p);
6911 return p + 4;
6912 }
6913
6914 /* Called via elf_link_hash_traverse to transfer dynamic linking
6915 information on function code symbol entries to their corresponding
6916 function descriptor symbol entries. */
6917
6918 static bfd_boolean
6919 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
6920 {
6921 struct bfd_link_info *info;
6922 struct ppc_link_hash_table *htab;
6923 struct plt_entry *ent;
6924 struct ppc_link_hash_entry *fh;
6925 struct ppc_link_hash_entry *fdh;
6926 bfd_boolean force_local;
6927
6928 fh = (struct ppc_link_hash_entry *) h;
6929 if (fh->elf.root.type == bfd_link_hash_indirect)
6930 return TRUE;
6931
6932 info = inf;
6933 htab = ppc_hash_table (info);
6934 if (htab == NULL)
6935 return FALSE;
6936
6937 /* Resolve undefined references to dot-symbols as the value
6938 in the function descriptor, if we have one in a regular object.
6939 This is to satisfy cases like ".quad .foo". Calls to functions
6940 in dynamic objects are handled elsewhere. */
6941 if (fh->elf.root.type == bfd_link_hash_undefweak
6942 && fh->was_undefined
6943 && (fdh = defined_func_desc (fh)) != NULL
6944 && get_opd_info (fdh->elf.root.u.def.section) != NULL
6945 && opd_entry_value (fdh->elf.root.u.def.section,
6946 fdh->elf.root.u.def.value,
6947 &fh->elf.root.u.def.section,
6948 &fh->elf.root.u.def.value, FALSE) != (bfd_vma) -1)
6949 {
6950 fh->elf.root.type = fdh->elf.root.type;
6951 fh->elf.forced_local = 1;
6952 fh->elf.def_regular = fdh->elf.def_regular;
6953 fh->elf.def_dynamic = fdh->elf.def_dynamic;
6954 }
6955
6956 /* If this is a function code symbol, transfer dynamic linking
6957 information to the function descriptor symbol. */
6958 if (!fh->is_func)
6959 return TRUE;
6960
6961 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
6962 if (ent->plt.refcount > 0)
6963 break;
6964 if (ent == NULL
6965 || fh->elf.root.root.string[0] != '.'
6966 || fh->elf.root.root.string[1] == '\0')
6967 return TRUE;
6968
6969 /* Find the corresponding function descriptor symbol. Create it
6970 as undefined if necessary. */
6971
6972 fdh = lookup_fdh (fh, htab);
6973 if (fdh == NULL
6974 && !bfd_link_executable (info)
6975 && (fh->elf.root.type == bfd_link_hash_undefined
6976 || fh->elf.root.type == bfd_link_hash_undefweak))
6977 {
6978 fdh = make_fdh (info, fh);
6979 if (fdh == NULL)
6980 return FALSE;
6981 }
6982
6983 /* Fake function descriptors are made undefweak. If the function
6984 code symbol is strong undefined, make the fake sym the same.
6985 If the function code symbol is defined, then force the fake
6986 descriptor local; We can't support overriding of symbols in a
6987 shared library on a fake descriptor. */
6988
6989 if (fdh != NULL
6990 && fdh->fake
6991 && fdh->elf.root.type == bfd_link_hash_undefweak)
6992 {
6993 if (fh->elf.root.type == bfd_link_hash_undefined)
6994 {
6995 fdh->elf.root.type = bfd_link_hash_undefined;
6996 bfd_link_add_undef (&htab->elf.root, &fdh->elf.root);
6997 }
6998 else if (fh->elf.root.type == bfd_link_hash_defined
6999 || fh->elf.root.type == bfd_link_hash_defweak)
7000 {
7001 _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE);
7002 }
7003 }
7004
7005 if (fdh != NULL
7006 && !fdh->elf.forced_local
7007 && (!bfd_link_executable (info)
7008 || fdh->elf.def_dynamic
7009 || fdh->elf.ref_dynamic
7010 || (fdh->elf.root.type == bfd_link_hash_undefweak
7011 && ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT)))
7012 {
7013 if (fdh->elf.dynindx == -1)
7014 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
7015 return FALSE;
7016 fdh->elf.ref_regular |= fh->elf.ref_regular;
7017 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
7018 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
7019 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
7020 if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT)
7021 {
7022 move_plt_plist (fh, fdh);
7023 fdh->elf.needs_plt = 1;
7024 }
7025 fdh->is_func_descriptor = 1;
7026 fdh->oh = fh;
7027 fh->oh = fdh;
7028 }
7029
7030 /* Now that the info is on the function descriptor, clear the
7031 function code sym info. Any function code syms for which we
7032 don't have a definition in a regular file, we force local.
7033 This prevents a shared library from exporting syms that have
7034 been imported from another library. Function code syms that
7035 are really in the library we must leave global to prevent the
7036 linker dragging in a definition from a static library. */
7037 force_local = (!fh->elf.def_regular
7038 || fdh == NULL
7039 || !fdh->elf.def_regular
7040 || fdh->elf.forced_local);
7041 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
7042
7043 return TRUE;
7044 }
7045
7046 static const struct sfpr_def_parms save_res_funcs[] =
7047 {
7048 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
7049 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
7050 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
7051 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
7052 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
7053 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
7054 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
7055 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
7056 { "._savef", 14, 31, savefpr, savefpr1_tail },
7057 { "._restf", 14, 31, restfpr, restfpr1_tail },
7058 { "_savevr_", 20, 31, savevr, savevr_tail },
7059 { "_restvr_", 20, 31, restvr, restvr_tail }
7060 };
7061
7062 /* Called near the start of bfd_elf_size_dynamic_sections. We use
7063 this hook to a) provide some gcc support functions, and b) transfer
7064 dynamic linking information gathered so far on function code symbol
7065 entries, to their corresponding function descriptor symbol entries. */
7066
7067 static bfd_boolean
7068 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
7069 struct bfd_link_info *info)
7070 {
7071 struct ppc_link_hash_table *htab;
7072 unsigned int i;
7073
7074 htab = ppc_hash_table (info);
7075 if (htab == NULL)
7076 return FALSE;
7077
7078 if (!bfd_link_relocatable (info)
7079 && htab->elf.hgot != NULL)
7080 {
7081 _bfd_elf_link_hash_hide_symbol (info, htab->elf.hgot, TRUE);
7082 /* Make .TOC. defined so as to prevent it being made dynamic.
7083 The wrong value here is fixed later in ppc64_elf_set_toc. */
7084 if (!htab->elf.hgot->def_regular
7085 || htab->elf.hgot->root.type != bfd_link_hash_defined)
7086 {
7087 htab->elf.hgot->root.type = bfd_link_hash_defined;
7088 htab->elf.hgot->root.u.def.value = 0;
7089 htab->elf.hgot->root.u.def.section = bfd_abs_section_ptr;
7090 htab->elf.hgot->def_regular = 1;
7091 htab->elf.hgot->root.linker_def = 1;
7092 }
7093 htab->elf.hgot->type = STT_OBJECT;
7094 htab->elf.hgot->other = ((htab->elf.hgot->other & ~ELF_ST_VISIBILITY (-1))
7095 | STV_HIDDEN);
7096 }
7097
7098 if (htab->sfpr == NULL)
7099 /* We don't have any relocs. */
7100 return TRUE;
7101
7102 /* Provide any missing _save* and _rest* functions. */
7103 htab->sfpr->size = 0;
7104 if (htab->params->save_restore_funcs)
7105 for (i = 0; i < ARRAY_SIZE (save_res_funcs); i++)
7106 if (!sfpr_define (info, &save_res_funcs[i], NULL))
7107 return FALSE;
7108
7109 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
7110
7111 if (htab->sfpr->size == 0)
7112 htab->sfpr->flags |= SEC_EXCLUDE;
7113
7114 return TRUE;
7115 }
7116
7117 /* Return true if we have dynamic relocs that apply to read-only sections. */
7118
7119 static bfd_boolean
7120 readonly_dynrelocs (struct elf_link_hash_entry *h)
7121 {
7122 struct ppc_link_hash_entry *eh;
7123 struct elf_dyn_relocs *p;
7124
7125 eh = (struct ppc_link_hash_entry *) h;
7126 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7127 {
7128 asection *s = p->sec->output_section;
7129
7130 if (s != NULL && (s->flags & SEC_READONLY) != 0)
7131 return TRUE;
7132 }
7133 return FALSE;
7134 }
7135
7136 /* Adjust a symbol defined by a dynamic object and referenced by a
7137 regular object. The current definition is in some section of the
7138 dynamic object, but we're not including those sections. We have to
7139 change the definition to something the rest of the link can
7140 understand. */
7141
7142 static bfd_boolean
7143 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
7144 struct elf_link_hash_entry *h)
7145 {
7146 struct ppc_link_hash_table *htab;
7147 asection *s;
7148
7149 htab = ppc_hash_table (info);
7150 if (htab == NULL)
7151 return FALSE;
7152
7153 /* Deal with function syms. */
7154 if (h->type == STT_FUNC
7155 || h->type == STT_GNU_IFUNC
7156 || h->needs_plt)
7157 {
7158 /* Clear procedure linkage table information for any symbol that
7159 won't need a .plt entry. */
7160 struct plt_entry *ent;
7161 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
7162 if (ent->plt.refcount > 0)
7163 break;
7164 if (ent == NULL
7165 || (h->type != STT_GNU_IFUNC
7166 && (SYMBOL_CALLS_LOCAL (info, h)
7167 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
7168 && h->root.type == bfd_link_hash_undefweak)))
7169 || ((struct ppc_link_hash_entry *) h)->save_res)
7170 {
7171 h->plt.plist = NULL;
7172 h->needs_plt = 0;
7173 h->pointer_equality_needed = 0;
7174 }
7175 else if (abiversion (info->output_bfd) == 2)
7176 {
7177 /* Taking a function's address in a read/write section
7178 doesn't require us to define the function symbol in the
7179 executable on a global entry stub. A dynamic reloc can
7180 be used instead. */
7181 if (h->pointer_equality_needed
7182 && h->type != STT_GNU_IFUNC
7183 && !readonly_dynrelocs (h))
7184 {
7185 h->pointer_equality_needed = 0;
7186 h->non_got_ref = 0;
7187 }
7188
7189 /* After adjust_dynamic_symbol, non_got_ref set in the
7190 non-shared case means that we have allocated space in
7191 .dynbss for the symbol and thus dyn_relocs for this
7192 symbol should be discarded.
7193 If we get here we know we are making a PLT entry for this
7194 symbol, and in an executable we'd normally resolve
7195 relocations against this symbol to the PLT entry. Allow
7196 dynamic relocs if the reference is weak, and the dynamic
7197 relocs will not cause text relocation. */
7198 else if (!h->ref_regular_nonweak
7199 && h->non_got_ref
7200 && h->type != STT_GNU_IFUNC
7201 && !readonly_dynrelocs (h))
7202 h->non_got_ref = 0;
7203
7204 /* If making a plt entry, then we don't need copy relocs. */
7205 return TRUE;
7206 }
7207 }
7208 else
7209 h->plt.plist = NULL;
7210
7211 /* If this is a weak symbol, and there is a real definition, the
7212 processor independent code will have arranged for us to see the
7213 real definition first, and we can just use the same value. */
7214 if (h->u.weakdef != NULL)
7215 {
7216 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
7217 || h->u.weakdef->root.type == bfd_link_hash_defweak);
7218 h->root.u.def.section = h->u.weakdef->root.u.def.section;
7219 h->root.u.def.value = h->u.weakdef->root.u.def.value;
7220 if (ELIMINATE_COPY_RELOCS)
7221 h->non_got_ref = h->u.weakdef->non_got_ref;
7222 return TRUE;
7223 }
7224
7225 /* If we are creating a shared library, we must presume that the
7226 only references to the symbol are via the global offset table.
7227 For such cases we need not do anything here; the relocations will
7228 be handled correctly by relocate_section. */
7229 if (bfd_link_pic (info))
7230 return TRUE;
7231
7232 /* If there are no references to this symbol that do not use the
7233 GOT, we don't need to generate a copy reloc. */
7234 if (!h->non_got_ref)
7235 return TRUE;
7236
7237 /* Don't generate a copy reloc for symbols defined in the executable. */
7238 if (!h->def_dynamic || !h->ref_regular || h->def_regular)
7239 return TRUE;
7240
7241 /* If -z nocopyreloc was given, don't generate them either. */
7242 if (info->nocopyreloc)
7243 {
7244 h->non_got_ref = 0;
7245 return TRUE;
7246 }
7247
7248 /* If we didn't find any dynamic relocs in read-only sections, then
7249 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
7250 if (ELIMINATE_COPY_RELOCS && !readonly_dynrelocs (h))
7251 {
7252 h->non_got_ref = 0;
7253 return TRUE;
7254 }
7255
7256 /* Protected variables do not work with .dynbss. The copy in
7257 .dynbss won't be used by the shared library with the protected
7258 definition for the variable. Text relocations are preferable
7259 to an incorrect program. */
7260 if (h->protected_def)
7261 {
7262 h->non_got_ref = 0;
7263 return TRUE;
7264 }
7265
7266 if (h->plt.plist != NULL)
7267 {
7268 /* We should never get here, but unfortunately there are versions
7269 of gcc out there that improperly (for this ABI) put initialized
7270 function pointers, vtable refs and suchlike in read-only
7271 sections. Allow them to proceed, but warn that this might
7272 break at runtime. */
7273 info->callbacks->einfo
7274 (_("%P: copy reloc against `%T' requires lazy plt linking; "
7275 "avoid setting LD_BIND_NOW=1 or upgrade gcc\n"),
7276 h->root.root.string);
7277 }
7278
7279 /* This is a reference to a symbol defined by a dynamic object which
7280 is not a function. */
7281
7282 /* We must allocate the symbol in our .dynbss section, which will
7283 become part of the .bss section of the executable. There will be
7284 an entry for this symbol in the .dynsym section. The dynamic
7285 object will contain position independent code, so all references
7286 from the dynamic object to this symbol will go through the global
7287 offset table. The dynamic linker will use the .dynsym entry to
7288 determine the address it must put in the global offset table, so
7289 both the dynamic object and the regular object will refer to the
7290 same memory location for the variable. */
7291
7292 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
7293 to copy the initial value out of the dynamic object and into the
7294 runtime process image. We need to remember the offset into the
7295 .rela.bss section we are going to use. */
7296 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
7297 {
7298 htab->relbss->size += sizeof (Elf64_External_Rela);
7299 h->needs_copy = 1;
7300 }
7301
7302 s = htab->dynbss;
7303
7304 return _bfd_elf_adjust_dynamic_copy (info, h, s);
7305 }
7306
7307 /* If given a function descriptor symbol, hide both the function code
7308 sym and the descriptor. */
7309 static void
7310 ppc64_elf_hide_symbol (struct bfd_link_info *info,
7311 struct elf_link_hash_entry *h,
7312 bfd_boolean force_local)
7313 {
7314 struct ppc_link_hash_entry *eh;
7315 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
7316
7317 eh = (struct ppc_link_hash_entry *) h;
7318 if (eh->is_func_descriptor)
7319 {
7320 struct ppc_link_hash_entry *fh = eh->oh;
7321
7322 if (fh == NULL)
7323 {
7324 const char *p, *q;
7325 struct ppc_link_hash_table *htab;
7326 char save;
7327
7328 /* We aren't supposed to use alloca in BFD because on
7329 systems which do not have alloca the version in libiberty
7330 calls xmalloc, which might cause the program to crash
7331 when it runs out of memory. This function doesn't have a
7332 return status, so there's no way to gracefully return an
7333 error. So cheat. We know that string[-1] can be safely
7334 accessed; It's either a string in an ELF string table,
7335 or allocated in an objalloc structure. */
7336
7337 p = eh->elf.root.root.string - 1;
7338 save = *p;
7339 *(char *) p = '.';
7340 htab = ppc_hash_table (info);
7341 if (htab == NULL)
7342 return;
7343
7344 fh = (struct ppc_link_hash_entry *)
7345 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
7346 *(char *) p = save;
7347
7348 /* Unfortunately, if it so happens that the string we were
7349 looking for was allocated immediately before this string,
7350 then we overwrote the string terminator. That's the only
7351 reason the lookup should fail. */
7352 if (fh == NULL)
7353 {
7354 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
7355 while (q >= eh->elf.root.root.string && *q == *p)
7356 --q, --p;
7357 if (q < eh->elf.root.root.string && *p == '.')
7358 fh = (struct ppc_link_hash_entry *)
7359 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
7360 }
7361 if (fh != NULL)
7362 {
7363 eh->oh = fh;
7364 fh->oh = eh;
7365 }
7366 }
7367 if (fh != NULL)
7368 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
7369 }
7370 }
7371
7372 static bfd_boolean
7373 get_sym_h (struct elf_link_hash_entry **hp,
7374 Elf_Internal_Sym **symp,
7375 asection **symsecp,
7376 unsigned char **tls_maskp,
7377 Elf_Internal_Sym **locsymsp,
7378 unsigned long r_symndx,
7379 bfd *ibfd)
7380 {
7381 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
7382
7383 if (r_symndx >= symtab_hdr->sh_info)
7384 {
7385 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
7386 struct elf_link_hash_entry *h;
7387
7388 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
7389 h = elf_follow_link (h);
7390
7391 if (hp != NULL)
7392 *hp = h;
7393
7394 if (symp != NULL)
7395 *symp = NULL;
7396
7397 if (symsecp != NULL)
7398 {
7399 asection *symsec = NULL;
7400 if (h->root.type == bfd_link_hash_defined
7401 || h->root.type == bfd_link_hash_defweak)
7402 symsec = h->root.u.def.section;
7403 *symsecp = symsec;
7404 }
7405
7406 if (tls_maskp != NULL)
7407 {
7408 struct ppc_link_hash_entry *eh;
7409
7410 eh = (struct ppc_link_hash_entry *) h;
7411 *tls_maskp = &eh->tls_mask;
7412 }
7413 }
7414 else
7415 {
7416 Elf_Internal_Sym *sym;
7417 Elf_Internal_Sym *locsyms = *locsymsp;
7418
7419 if (locsyms == NULL)
7420 {
7421 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
7422 if (locsyms == NULL)
7423 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
7424 symtab_hdr->sh_info,
7425 0, NULL, NULL, NULL);
7426 if (locsyms == NULL)
7427 return FALSE;
7428 *locsymsp = locsyms;
7429 }
7430 sym = locsyms + r_symndx;
7431
7432 if (hp != NULL)
7433 *hp = NULL;
7434
7435 if (symp != NULL)
7436 *symp = sym;
7437
7438 if (symsecp != NULL)
7439 *symsecp = bfd_section_from_elf_index (ibfd, sym->st_shndx);
7440
7441 if (tls_maskp != NULL)
7442 {
7443 struct got_entry **lgot_ents;
7444 unsigned char *tls_mask;
7445
7446 tls_mask = NULL;
7447 lgot_ents = elf_local_got_ents (ibfd);
7448 if (lgot_ents != NULL)
7449 {
7450 struct plt_entry **local_plt = (struct plt_entry **)
7451 (lgot_ents + symtab_hdr->sh_info);
7452 unsigned char *lgot_masks = (unsigned char *)
7453 (local_plt + symtab_hdr->sh_info);
7454 tls_mask = &lgot_masks[r_symndx];
7455 }
7456 *tls_maskp = tls_mask;
7457 }
7458 }
7459 return TRUE;
7460 }
7461
7462 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
7463 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
7464 type suitable for optimization, and 1 otherwise. */
7465
7466 static int
7467 get_tls_mask (unsigned char **tls_maskp,
7468 unsigned long *toc_symndx,
7469 bfd_vma *toc_addend,
7470 Elf_Internal_Sym **locsymsp,
7471 const Elf_Internal_Rela *rel,
7472 bfd *ibfd)
7473 {
7474 unsigned long r_symndx;
7475 int next_r;
7476 struct elf_link_hash_entry *h;
7477 Elf_Internal_Sym *sym;
7478 asection *sec;
7479 bfd_vma off;
7480
7481 r_symndx = ELF64_R_SYM (rel->r_info);
7482 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
7483 return 0;
7484
7485 if ((*tls_maskp != NULL && **tls_maskp != 0)
7486 || sec == NULL
7487 || ppc64_elf_section_data (sec) == NULL
7488 || ppc64_elf_section_data (sec)->sec_type != sec_toc)
7489 return 1;
7490
7491 /* Look inside a TOC section too. */
7492 if (h != NULL)
7493 {
7494 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
7495 off = h->root.u.def.value;
7496 }
7497 else
7498 off = sym->st_value;
7499 off += rel->r_addend;
7500 BFD_ASSERT (off % 8 == 0);
7501 r_symndx = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8];
7502 next_r = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8 + 1];
7503 if (toc_symndx != NULL)
7504 *toc_symndx = r_symndx;
7505 if (toc_addend != NULL)
7506 *toc_addend = ppc64_elf_section_data (sec)->u.toc.add[off / 8];
7507 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
7508 return 0;
7509 if ((h == NULL || is_static_defined (h))
7510 && (next_r == -1 || next_r == -2))
7511 return 1 - next_r;
7512 return 1;
7513 }
7514
7515 /* Find (or create) an entry in the tocsave hash table. */
7516
7517 static struct tocsave_entry *
7518 tocsave_find (struct ppc_link_hash_table *htab,
7519 enum insert_option insert,
7520 Elf_Internal_Sym **local_syms,
7521 const Elf_Internal_Rela *irela,
7522 bfd *ibfd)
7523 {
7524 unsigned long r_indx;
7525 struct elf_link_hash_entry *h;
7526 Elf_Internal_Sym *sym;
7527 struct tocsave_entry ent, *p;
7528 hashval_t hash;
7529 struct tocsave_entry **slot;
7530
7531 r_indx = ELF64_R_SYM (irela->r_info);
7532 if (!get_sym_h (&h, &sym, &ent.sec, NULL, local_syms, r_indx, ibfd))
7533 return NULL;
7534 if (ent.sec == NULL || ent.sec->output_section == NULL)
7535 {
7536 (*_bfd_error_handler)
7537 (_("%B: undefined symbol on R_PPC64_TOCSAVE relocation"));
7538 return NULL;
7539 }
7540
7541 if (h != NULL)
7542 ent.offset = h->root.u.def.value;
7543 else
7544 ent.offset = sym->st_value;
7545 ent.offset += irela->r_addend;
7546
7547 hash = tocsave_htab_hash (&ent);
7548 slot = ((struct tocsave_entry **)
7549 htab_find_slot_with_hash (htab->tocsave_htab, &ent, hash, insert));
7550 if (slot == NULL)
7551 return NULL;
7552
7553 if (*slot == NULL)
7554 {
7555 p = (struct tocsave_entry *) bfd_alloc (ibfd, sizeof (*p));
7556 if (p == NULL)
7557 return NULL;
7558 *p = ent;
7559 *slot = p;
7560 }
7561 return *slot;
7562 }
7563
7564 /* Adjust all global syms defined in opd sections. In gcc generated
7565 code for the old ABI, these will already have been done. */
7566
7567 static bfd_boolean
7568 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
7569 {
7570 struct ppc_link_hash_entry *eh;
7571 asection *sym_sec;
7572 struct _opd_sec_data *opd;
7573
7574 if (h->root.type == bfd_link_hash_indirect)
7575 return TRUE;
7576
7577 if (h->root.type != bfd_link_hash_defined
7578 && h->root.type != bfd_link_hash_defweak)
7579 return TRUE;
7580
7581 eh = (struct ppc_link_hash_entry *) h;
7582 if (eh->adjust_done)
7583 return TRUE;
7584
7585 sym_sec = eh->elf.root.u.def.section;
7586 opd = get_opd_info (sym_sec);
7587 if (opd != NULL && opd->adjust != NULL)
7588 {
7589 long adjust = opd->adjust[OPD_NDX (eh->elf.root.u.def.value)];
7590 if (adjust == -1)
7591 {
7592 /* This entry has been deleted. */
7593 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
7594 if (dsec == NULL)
7595 {
7596 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
7597 if (discarded_section (dsec))
7598 {
7599 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
7600 break;
7601 }
7602 }
7603 eh->elf.root.u.def.value = 0;
7604 eh->elf.root.u.def.section = dsec;
7605 }
7606 else
7607 eh->elf.root.u.def.value += adjust;
7608 eh->adjust_done = 1;
7609 }
7610 return TRUE;
7611 }
7612
7613 /* Handles decrementing dynamic reloc counts for the reloc specified by
7614 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM
7615 have already been determined. */
7616
7617 static bfd_boolean
7618 dec_dynrel_count (bfd_vma r_info,
7619 asection *sec,
7620 struct bfd_link_info *info,
7621 Elf_Internal_Sym **local_syms,
7622 struct elf_link_hash_entry *h,
7623 Elf_Internal_Sym *sym)
7624 {
7625 enum elf_ppc64_reloc_type r_type;
7626 asection *sym_sec = NULL;
7627
7628 /* Can this reloc be dynamic? This switch, and later tests here
7629 should be kept in sync with the code in check_relocs. */
7630 r_type = ELF64_R_TYPE (r_info);
7631 switch (r_type)
7632 {
7633 default:
7634 return TRUE;
7635
7636 case R_PPC64_TPREL16:
7637 case R_PPC64_TPREL16_LO:
7638 case R_PPC64_TPREL16_HI:
7639 case R_PPC64_TPREL16_HA:
7640 case R_PPC64_TPREL16_DS:
7641 case R_PPC64_TPREL16_LO_DS:
7642 case R_PPC64_TPREL16_HIGH:
7643 case R_PPC64_TPREL16_HIGHA:
7644 case R_PPC64_TPREL16_HIGHER:
7645 case R_PPC64_TPREL16_HIGHERA:
7646 case R_PPC64_TPREL16_HIGHEST:
7647 case R_PPC64_TPREL16_HIGHESTA:
7648 if (!bfd_link_pic (info))
7649 return TRUE;
7650
7651 case R_PPC64_TPREL64:
7652 case R_PPC64_DTPMOD64:
7653 case R_PPC64_DTPREL64:
7654 case R_PPC64_ADDR64:
7655 case R_PPC64_REL30:
7656 case R_PPC64_REL32:
7657 case R_PPC64_REL64:
7658 case R_PPC64_ADDR14:
7659 case R_PPC64_ADDR14_BRNTAKEN:
7660 case R_PPC64_ADDR14_BRTAKEN:
7661 case R_PPC64_ADDR16:
7662 case R_PPC64_ADDR16_DS:
7663 case R_PPC64_ADDR16_HA:
7664 case R_PPC64_ADDR16_HI:
7665 case R_PPC64_ADDR16_HIGH:
7666 case R_PPC64_ADDR16_HIGHA:
7667 case R_PPC64_ADDR16_HIGHER:
7668 case R_PPC64_ADDR16_HIGHERA:
7669 case R_PPC64_ADDR16_HIGHEST:
7670 case R_PPC64_ADDR16_HIGHESTA:
7671 case R_PPC64_ADDR16_LO:
7672 case R_PPC64_ADDR16_LO_DS:
7673 case R_PPC64_ADDR24:
7674 case R_PPC64_ADDR32:
7675 case R_PPC64_UADDR16:
7676 case R_PPC64_UADDR32:
7677 case R_PPC64_UADDR64:
7678 case R_PPC64_TOC:
7679 break;
7680 }
7681
7682 if (local_syms != NULL)
7683 {
7684 unsigned long r_symndx;
7685 bfd *ibfd = sec->owner;
7686
7687 r_symndx = ELF64_R_SYM (r_info);
7688 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
7689 return FALSE;
7690 }
7691
7692 if ((bfd_link_pic (info)
7693 && (must_be_dyn_reloc (info, r_type)
7694 || (h != NULL
7695 && (!SYMBOLIC_BIND (info, h)
7696 || h->root.type == bfd_link_hash_defweak
7697 || !h->def_regular))))
7698 || (ELIMINATE_COPY_RELOCS
7699 && !bfd_link_pic (info)
7700 && h != NULL
7701 && (h->root.type == bfd_link_hash_defweak
7702 || !h->def_regular)))
7703 ;
7704 else
7705 return TRUE;
7706
7707 if (h != NULL)
7708 {
7709 struct elf_dyn_relocs *p;
7710 struct elf_dyn_relocs **pp;
7711 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
7712
7713 /* elf_gc_sweep may have already removed all dyn relocs associated
7714 with local syms for a given section. Also, symbol flags are
7715 changed by elf_gc_sweep_symbol, confusing the test above. Don't
7716 report a dynreloc miscount. */
7717 if (*pp == NULL && info->gc_sections)
7718 return TRUE;
7719
7720 while ((p = *pp) != NULL)
7721 {
7722 if (p->sec == sec)
7723 {
7724 if (!must_be_dyn_reloc (info, r_type))
7725 p->pc_count -= 1;
7726 p->count -= 1;
7727 if (p->count == 0)
7728 *pp = p->next;
7729 return TRUE;
7730 }
7731 pp = &p->next;
7732 }
7733 }
7734 else
7735 {
7736 struct ppc_dyn_relocs *p;
7737 struct ppc_dyn_relocs **pp;
7738 void *vpp;
7739 bfd_boolean is_ifunc;
7740
7741 if (local_syms == NULL)
7742 sym_sec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
7743 if (sym_sec == NULL)
7744 sym_sec = sec;
7745
7746 vpp = &elf_section_data (sym_sec)->local_dynrel;
7747 pp = (struct ppc_dyn_relocs **) vpp;
7748
7749 if (*pp == NULL && info->gc_sections)
7750 return TRUE;
7751
7752 is_ifunc = ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC;
7753 while ((p = *pp) != NULL)
7754 {
7755 if (p->sec == sec && p->ifunc == is_ifunc)
7756 {
7757 p->count -= 1;
7758 if (p->count == 0)
7759 *pp = p->next;
7760 return TRUE;
7761 }
7762 pp = &p->next;
7763 }
7764 }
7765
7766 info->callbacks->einfo (_("%P: dynreloc miscount for %B, section %A\n"),
7767 sec->owner, sec);
7768 bfd_set_error (bfd_error_bad_value);
7769 return FALSE;
7770 }
7771
7772 /* Remove unused Official Procedure Descriptor entries. Currently we
7773 only remove those associated with functions in discarded link-once
7774 sections, or weakly defined functions that have been overridden. It
7775 would be possible to remove many more entries for statically linked
7776 applications. */
7777
7778 bfd_boolean
7779 ppc64_elf_edit_opd (struct bfd_link_info *info)
7780 {
7781 bfd *ibfd;
7782 bfd_boolean some_edited = FALSE;
7783 asection *need_pad = NULL;
7784 struct ppc_link_hash_table *htab;
7785
7786 htab = ppc_hash_table (info);
7787 if (htab == NULL)
7788 return FALSE;
7789
7790 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
7791 {
7792 asection *sec;
7793 Elf_Internal_Rela *relstart, *rel, *relend;
7794 Elf_Internal_Shdr *symtab_hdr;
7795 Elf_Internal_Sym *local_syms;
7796 struct _opd_sec_data *opd;
7797 bfd_boolean need_edit, add_aux_fields, broken;
7798 bfd_size_type cnt_16b = 0;
7799
7800 if (!is_ppc64_elf (ibfd))
7801 continue;
7802
7803 sec = bfd_get_section_by_name (ibfd, ".opd");
7804 if (sec == NULL || sec->size == 0)
7805 continue;
7806
7807 if (sec->sec_info_type == SEC_INFO_TYPE_JUST_SYMS)
7808 continue;
7809
7810 if (sec->output_section == bfd_abs_section_ptr)
7811 continue;
7812
7813 /* Look through the section relocs. */
7814 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
7815 continue;
7816
7817 local_syms = NULL;
7818 symtab_hdr = &elf_symtab_hdr (ibfd);
7819
7820 /* Read the relocations. */
7821 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7822 info->keep_memory);
7823 if (relstart == NULL)
7824 return FALSE;
7825
7826 /* First run through the relocs to check they are sane, and to
7827 determine whether we need to edit this opd section. */
7828 need_edit = FALSE;
7829 broken = FALSE;
7830 need_pad = sec;
7831 relend = relstart + sec->reloc_count;
7832 for (rel = relstart; rel < relend; )
7833 {
7834 enum elf_ppc64_reloc_type r_type;
7835 unsigned long r_symndx;
7836 asection *sym_sec;
7837 struct elf_link_hash_entry *h;
7838 Elf_Internal_Sym *sym;
7839 bfd_vma offset;
7840
7841 /* .opd contains an array of 16 or 24 byte entries. We're
7842 only interested in the reloc pointing to a function entry
7843 point. */
7844 offset = rel->r_offset;
7845 if (rel + 1 == relend
7846 || rel[1].r_offset != offset + 8)
7847 {
7848 /* If someone messes with .opd alignment then after a
7849 "ld -r" we might have padding in the middle of .opd.
7850 Also, there's nothing to prevent someone putting
7851 something silly in .opd with the assembler. No .opd
7852 optimization for them! */
7853 broken_opd:
7854 (*_bfd_error_handler)
7855 (_("%B: .opd is not a regular array of opd entries"), ibfd);
7856 broken = TRUE;
7857 break;
7858 }
7859
7860 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
7861 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
7862 {
7863 (*_bfd_error_handler)
7864 (_("%B: unexpected reloc type %u in .opd section"),
7865 ibfd, r_type);
7866 broken = TRUE;
7867 break;
7868 }
7869
7870 r_symndx = ELF64_R_SYM (rel->r_info);
7871 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7872 r_symndx, ibfd))
7873 goto error_ret;
7874
7875 if (sym_sec == NULL || sym_sec->owner == NULL)
7876 {
7877 const char *sym_name;
7878 if (h != NULL)
7879 sym_name = h->root.root.string;
7880 else
7881 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
7882 sym_sec);
7883
7884 (*_bfd_error_handler)
7885 (_("%B: undefined sym `%s' in .opd section"),
7886 ibfd, sym_name);
7887 broken = TRUE;
7888 break;
7889 }
7890
7891 /* opd entries are always for functions defined in the
7892 current input bfd. If the symbol isn't defined in the
7893 input bfd, then we won't be using the function in this
7894 bfd; It must be defined in a linkonce section in another
7895 bfd, or is weak. It's also possible that we are
7896 discarding the function due to a linker script /DISCARD/,
7897 which we test for via the output_section. */
7898 if (sym_sec->owner != ibfd
7899 || sym_sec->output_section == bfd_abs_section_ptr)
7900 need_edit = TRUE;
7901
7902 rel += 2;
7903 if (rel + 1 == relend
7904 || (rel + 2 < relend
7905 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC))
7906 ++rel;
7907
7908 if (rel == relend)
7909 {
7910 if (sec->size == offset + 24)
7911 {
7912 need_pad = NULL;
7913 break;
7914 }
7915 if (sec->size == offset + 16)
7916 {
7917 cnt_16b++;
7918 break;
7919 }
7920 goto broken_opd;
7921 }
7922 else if (rel + 1 < relend
7923 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
7924 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
7925 {
7926 if (rel[0].r_offset == offset + 16)
7927 cnt_16b++;
7928 else if (rel[0].r_offset != offset + 24)
7929 goto broken_opd;
7930 }
7931 else
7932 goto broken_opd;
7933 }
7934
7935 add_aux_fields = htab->params->non_overlapping_opd && cnt_16b > 0;
7936
7937 if (!broken && (need_edit || add_aux_fields))
7938 {
7939 Elf_Internal_Rela *write_rel;
7940 Elf_Internal_Shdr *rel_hdr;
7941 bfd_byte *rptr, *wptr;
7942 bfd_byte *new_contents;
7943 bfd_size_type amt;
7944
7945 new_contents = NULL;
7946 amt = OPD_NDX (sec->size) * sizeof (long);
7947 opd = &ppc64_elf_section_data (sec)->u.opd;
7948 opd->adjust = bfd_zalloc (sec->owner, amt);
7949 if (opd->adjust == NULL)
7950 return FALSE;
7951 ppc64_elf_section_data (sec)->sec_type = sec_opd;
7952
7953 /* This seems a waste of time as input .opd sections are all
7954 zeros as generated by gcc, but I suppose there's no reason
7955 this will always be so. We might start putting something in
7956 the third word of .opd entries. */
7957 if ((sec->flags & SEC_IN_MEMORY) == 0)
7958 {
7959 bfd_byte *loc;
7960 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
7961 {
7962 if (loc != NULL)
7963 free (loc);
7964 error_ret:
7965 if (local_syms != NULL
7966 && symtab_hdr->contents != (unsigned char *) local_syms)
7967 free (local_syms);
7968 if (elf_section_data (sec)->relocs != relstart)
7969 free (relstart);
7970 return FALSE;
7971 }
7972 sec->contents = loc;
7973 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
7974 }
7975
7976 elf_section_data (sec)->relocs = relstart;
7977
7978 new_contents = sec->contents;
7979 if (add_aux_fields)
7980 {
7981 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
7982 if (new_contents == NULL)
7983 return FALSE;
7984 need_pad = NULL;
7985 }
7986 wptr = new_contents;
7987 rptr = sec->contents;
7988 write_rel = relstart;
7989 for (rel = relstart; rel < relend; )
7990 {
7991 unsigned long r_symndx;
7992 asection *sym_sec;
7993 struct elf_link_hash_entry *h;
7994 struct ppc_link_hash_entry *fdh = NULL;
7995 Elf_Internal_Sym *sym;
7996 long opd_ent_size;
7997 Elf_Internal_Rela *next_rel;
7998 bfd_boolean skip;
7999
8000 r_symndx = ELF64_R_SYM (rel->r_info);
8001 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8002 r_symndx, ibfd))
8003 goto error_ret;
8004
8005 next_rel = rel + 2;
8006 if (next_rel + 1 == relend
8007 || (next_rel + 2 < relend
8008 && ELF64_R_TYPE (next_rel[2].r_info) == R_PPC64_TOC))
8009 ++next_rel;
8010
8011 /* See if the .opd entry is full 24 byte or
8012 16 byte (with fd_aux entry overlapped with next
8013 fd_func). */
8014 opd_ent_size = 24;
8015 if (next_rel == relend)
8016 {
8017 if (sec->size == rel->r_offset + 16)
8018 opd_ent_size = 16;
8019 }
8020 else if (next_rel->r_offset == rel->r_offset + 16)
8021 opd_ent_size = 16;
8022
8023 if (h != NULL
8024 && h->root.root.string[0] == '.')
8025 {
8026 fdh = lookup_fdh ((struct ppc_link_hash_entry *) h, htab);
8027 if (fdh != NULL
8028 && fdh->elf.root.type != bfd_link_hash_defined
8029 && fdh->elf.root.type != bfd_link_hash_defweak)
8030 fdh = NULL;
8031 }
8032
8033 skip = (sym_sec->owner != ibfd
8034 || sym_sec->output_section == bfd_abs_section_ptr);
8035 if (skip)
8036 {
8037 if (fdh != NULL && sym_sec->owner == ibfd)
8038 {
8039 /* Arrange for the function descriptor sym
8040 to be dropped. */
8041 fdh->elf.root.u.def.value = 0;
8042 fdh->elf.root.u.def.section = sym_sec;
8043 }
8044 opd->adjust[OPD_NDX (rel->r_offset)] = -1;
8045
8046 if (NO_OPD_RELOCS || bfd_link_relocatable (info))
8047 rel = next_rel;
8048 else
8049 while (1)
8050 {
8051 if (!dec_dynrel_count (rel->r_info, sec, info,
8052 NULL, h, sym))
8053 goto error_ret;
8054
8055 if (++rel == next_rel)
8056 break;
8057
8058 r_symndx = ELF64_R_SYM (rel->r_info);
8059 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8060 r_symndx, ibfd))
8061 goto error_ret;
8062 }
8063 }
8064 else
8065 {
8066 /* We'll be keeping this opd entry. */
8067 long adjust;
8068
8069 if (fdh != NULL)
8070 {
8071 /* Redefine the function descriptor symbol to
8072 this location in the opd section. It is
8073 necessary to update the value here rather
8074 than using an array of adjustments as we do
8075 for local symbols, because various places
8076 in the generic ELF code use the value
8077 stored in u.def.value. */
8078 fdh->elf.root.u.def.value = wptr - new_contents;
8079 fdh->adjust_done = 1;
8080 }
8081
8082 /* Local syms are a bit tricky. We could
8083 tweak them as they can be cached, but
8084 we'd need to look through the local syms
8085 for the function descriptor sym which we
8086 don't have at the moment. So keep an
8087 array of adjustments. */
8088 adjust = (wptr - new_contents) - (rptr - sec->contents);
8089 opd->adjust[OPD_NDX (rel->r_offset)] = adjust;
8090
8091 if (wptr != rptr)
8092 memcpy (wptr, rptr, opd_ent_size);
8093 wptr += opd_ent_size;
8094 if (add_aux_fields && opd_ent_size == 16)
8095 {
8096 memset (wptr, '\0', 8);
8097 wptr += 8;
8098 }
8099
8100 /* We need to adjust any reloc offsets to point to the
8101 new opd entries. */
8102 for ( ; rel != next_rel; ++rel)
8103 {
8104 rel->r_offset += adjust;
8105 if (write_rel != rel)
8106 memcpy (write_rel, rel, sizeof (*rel));
8107 ++write_rel;
8108 }
8109 }
8110
8111 rptr += opd_ent_size;
8112 }
8113
8114 sec->size = wptr - new_contents;
8115 sec->reloc_count = write_rel - relstart;
8116 if (add_aux_fields)
8117 {
8118 free (sec->contents);
8119 sec->contents = new_contents;
8120 }
8121
8122 /* Fudge the header size too, as this is used later in
8123 elf_bfd_final_link if we are emitting relocs. */
8124 rel_hdr = _bfd_elf_single_rel_hdr (sec);
8125 rel_hdr->sh_size = sec->reloc_count * rel_hdr->sh_entsize;
8126 some_edited = TRUE;
8127 }
8128 else if (elf_section_data (sec)->relocs != relstart)
8129 free (relstart);
8130
8131 if (local_syms != NULL
8132 && symtab_hdr->contents != (unsigned char *) local_syms)
8133 {
8134 if (!info->keep_memory)
8135 free (local_syms);
8136 else
8137 symtab_hdr->contents = (unsigned char *) local_syms;
8138 }
8139 }
8140
8141 if (some_edited)
8142 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
8143
8144 /* If we are doing a final link and the last .opd entry is just 16 byte
8145 long, add a 8 byte padding after it. */
8146 if (need_pad != NULL && !bfd_link_relocatable (info))
8147 {
8148 bfd_byte *p;
8149
8150 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
8151 {
8152 BFD_ASSERT (need_pad->size > 0);
8153
8154 p = bfd_malloc (need_pad->size + 8);
8155 if (p == NULL)
8156 return FALSE;
8157
8158 if (! bfd_get_section_contents (need_pad->owner, need_pad,
8159 p, 0, need_pad->size))
8160 return FALSE;
8161
8162 need_pad->contents = p;
8163 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
8164 }
8165 else
8166 {
8167 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
8168 if (p == NULL)
8169 return FALSE;
8170
8171 need_pad->contents = p;
8172 }
8173
8174 memset (need_pad->contents + need_pad->size, 0, 8);
8175 need_pad->size += 8;
8176 }
8177
8178 return TRUE;
8179 }
8180
8181 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
8182
8183 asection *
8184 ppc64_elf_tls_setup (struct bfd_link_info *info)
8185 {
8186 struct ppc_link_hash_table *htab;
8187
8188 htab = ppc_hash_table (info);
8189 if (htab == NULL)
8190 return NULL;
8191
8192 if (abiversion (info->output_bfd) == 1)
8193 htab->opd_abi = 1;
8194
8195 if (htab->params->no_multi_toc)
8196 htab->do_multi_toc = 0;
8197 else if (!htab->do_multi_toc)
8198 htab->params->no_multi_toc = 1;
8199
8200 htab->tls_get_addr = ((struct ppc_link_hash_entry *)
8201 elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
8202 FALSE, FALSE, TRUE));
8203 /* Move dynamic linking info to the function descriptor sym. */
8204 if (htab->tls_get_addr != NULL)
8205 func_desc_adjust (&htab->tls_get_addr->elf, info);
8206 htab->tls_get_addr_fd = ((struct ppc_link_hash_entry *)
8207 elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
8208 FALSE, FALSE, TRUE));
8209 if (htab->params->tls_get_addr_opt)
8210 {
8211 struct elf_link_hash_entry *opt, *opt_fd, *tga, *tga_fd;
8212
8213 opt = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr_opt",
8214 FALSE, FALSE, TRUE);
8215 if (opt != NULL)
8216 func_desc_adjust (opt, info);
8217 opt_fd = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
8218 FALSE, FALSE, TRUE);
8219 if (opt_fd != NULL
8220 && (opt_fd->root.type == bfd_link_hash_defined
8221 || opt_fd->root.type == bfd_link_hash_defweak))
8222 {
8223 /* If glibc supports an optimized __tls_get_addr call stub,
8224 signalled by the presence of __tls_get_addr_opt, and we'll
8225 be calling __tls_get_addr via a plt call stub, then
8226 make __tls_get_addr point to __tls_get_addr_opt. */
8227 tga_fd = &htab->tls_get_addr_fd->elf;
8228 if (htab->elf.dynamic_sections_created
8229 && tga_fd != NULL
8230 && (tga_fd->type == STT_FUNC
8231 || tga_fd->needs_plt)
8232 && !(SYMBOL_CALLS_LOCAL (info, tga_fd)
8233 || (ELF_ST_VISIBILITY (tga_fd->other) != STV_DEFAULT
8234 && tga_fd->root.type == bfd_link_hash_undefweak)))
8235 {
8236 struct plt_entry *ent;
8237
8238 for (ent = tga_fd->plt.plist; ent != NULL; ent = ent->next)
8239 if (ent->plt.refcount > 0)
8240 break;
8241 if (ent != NULL)
8242 {
8243 tga_fd->root.type = bfd_link_hash_indirect;
8244 tga_fd->root.u.i.link = &opt_fd->root;
8245 ppc64_elf_copy_indirect_symbol (info, opt_fd, tga_fd);
8246 if (opt_fd->dynindx != -1)
8247 {
8248 /* Use __tls_get_addr_opt in dynamic relocations. */
8249 opt_fd->dynindx = -1;
8250 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
8251 opt_fd->dynstr_index);
8252 if (!bfd_elf_link_record_dynamic_symbol (info, opt_fd))
8253 return NULL;
8254 }
8255 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) opt_fd;
8256 tga = &htab->tls_get_addr->elf;
8257 if (opt != NULL && tga != NULL)
8258 {
8259 tga->root.type = bfd_link_hash_indirect;
8260 tga->root.u.i.link = &opt->root;
8261 ppc64_elf_copy_indirect_symbol (info, opt, tga);
8262 _bfd_elf_link_hash_hide_symbol (info, opt,
8263 tga->forced_local);
8264 htab->tls_get_addr = (struct ppc_link_hash_entry *) opt;
8265 }
8266 htab->tls_get_addr_fd->oh = htab->tls_get_addr;
8267 htab->tls_get_addr_fd->is_func_descriptor = 1;
8268 if (htab->tls_get_addr != NULL)
8269 {
8270 htab->tls_get_addr->oh = htab->tls_get_addr_fd;
8271 htab->tls_get_addr->is_func = 1;
8272 }
8273 }
8274 }
8275 }
8276 else if (htab->params->tls_get_addr_opt < 0)
8277 htab->params->tls_get_addr_opt = 0;
8278 }
8279 return _bfd_elf_tls_setup (info->output_bfd, info);
8280 }
8281
8282 /* Return TRUE iff REL is a branch reloc with a global symbol matching
8283 HASH1 or HASH2. */
8284
8285 static bfd_boolean
8286 branch_reloc_hash_match (const bfd *ibfd,
8287 const Elf_Internal_Rela *rel,
8288 const struct ppc_link_hash_entry *hash1,
8289 const struct ppc_link_hash_entry *hash2)
8290 {
8291 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
8292 enum elf_ppc64_reloc_type r_type = ELF64_R_TYPE (rel->r_info);
8293 unsigned int r_symndx = ELF64_R_SYM (rel->r_info);
8294
8295 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
8296 {
8297 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
8298 struct elf_link_hash_entry *h;
8299
8300 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
8301 h = elf_follow_link (h);
8302 if (h == &hash1->elf || h == &hash2->elf)
8303 return TRUE;
8304 }
8305 return FALSE;
8306 }
8307
8308 /* Run through all the TLS relocs looking for optimization
8309 opportunities. The linker has been hacked (see ppc64elf.em) to do
8310 a preliminary section layout so that we know the TLS segment
8311 offsets. We can't optimize earlier because some optimizations need
8312 to know the tp offset, and we need to optimize before allocating
8313 dynamic relocations. */
8314
8315 bfd_boolean
8316 ppc64_elf_tls_optimize (struct bfd_link_info *info)
8317 {
8318 bfd *ibfd;
8319 asection *sec;
8320 struct ppc_link_hash_table *htab;
8321 unsigned char *toc_ref;
8322 int pass;
8323
8324 if (!bfd_link_executable (info))
8325 return TRUE;
8326
8327 htab = ppc_hash_table (info);
8328 if (htab == NULL)
8329 return FALSE;
8330
8331 /* Make two passes over the relocs. On the first pass, mark toc
8332 entries involved with tls relocs, and check that tls relocs
8333 involved in setting up a tls_get_addr call are indeed followed by
8334 such a call. If they are not, we can't do any tls optimization.
8335 On the second pass twiddle tls_mask flags to notify
8336 relocate_section that optimization can be done, and adjust got
8337 and plt refcounts. */
8338 toc_ref = NULL;
8339 for (pass = 0; pass < 2; ++pass)
8340 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
8341 {
8342 Elf_Internal_Sym *locsyms = NULL;
8343 asection *toc = bfd_get_section_by_name (ibfd, ".toc");
8344
8345 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8346 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
8347 {
8348 Elf_Internal_Rela *relstart, *rel, *relend;
8349 bfd_boolean found_tls_get_addr_arg = 0;
8350
8351 /* Read the relocations. */
8352 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8353 info->keep_memory);
8354 if (relstart == NULL)
8355 {
8356 free (toc_ref);
8357 return FALSE;
8358 }
8359
8360 relend = relstart + sec->reloc_count;
8361 for (rel = relstart; rel < relend; rel++)
8362 {
8363 enum elf_ppc64_reloc_type r_type;
8364 unsigned long r_symndx;
8365 struct elf_link_hash_entry *h;
8366 Elf_Internal_Sym *sym;
8367 asection *sym_sec;
8368 unsigned char *tls_mask;
8369 unsigned char tls_set, tls_clear, tls_type = 0;
8370 bfd_vma value;
8371 bfd_boolean ok_tprel, is_local;
8372 long toc_ref_index = 0;
8373 int expecting_tls_get_addr = 0;
8374 bfd_boolean ret = FALSE;
8375
8376 r_symndx = ELF64_R_SYM (rel->r_info);
8377 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
8378 r_symndx, ibfd))
8379 {
8380 err_free_rel:
8381 if (elf_section_data (sec)->relocs != relstart)
8382 free (relstart);
8383 if (toc_ref != NULL)
8384 free (toc_ref);
8385 if (locsyms != NULL
8386 && (elf_symtab_hdr (ibfd).contents
8387 != (unsigned char *) locsyms))
8388 free (locsyms);
8389 return ret;
8390 }
8391
8392 if (h != NULL)
8393 {
8394 if (h->root.type == bfd_link_hash_defined
8395 || h->root.type == bfd_link_hash_defweak)
8396 value = h->root.u.def.value;
8397 else if (h->root.type == bfd_link_hash_undefweak)
8398 value = 0;
8399 else
8400 {
8401 found_tls_get_addr_arg = 0;
8402 continue;
8403 }
8404 }
8405 else
8406 /* Symbols referenced by TLS relocs must be of type
8407 STT_TLS. So no need for .opd local sym adjust. */
8408 value = sym->st_value;
8409
8410 ok_tprel = FALSE;
8411 is_local = FALSE;
8412 if (h == NULL
8413 || !h->def_dynamic)
8414 {
8415 is_local = TRUE;
8416 if (h != NULL
8417 && h->root.type == bfd_link_hash_undefweak)
8418 ok_tprel = TRUE;
8419 else if (sym_sec != NULL
8420 && sym_sec->output_section != NULL)
8421 {
8422 value += sym_sec->output_offset;
8423 value += sym_sec->output_section->vma;
8424 value -= htab->elf.tls_sec->vma;
8425 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
8426 < (bfd_vma) 1 << 32);
8427 }
8428 }
8429
8430 r_type = ELF64_R_TYPE (rel->r_info);
8431 /* If this section has old-style __tls_get_addr calls
8432 without marker relocs, then check that each
8433 __tls_get_addr call reloc is preceded by a reloc
8434 that conceivably belongs to the __tls_get_addr arg
8435 setup insn. If we don't find matching arg setup
8436 relocs, don't do any tls optimization. */
8437 if (pass == 0
8438 && sec->has_tls_get_addr_call
8439 && h != NULL
8440 && (h == &htab->tls_get_addr->elf
8441 || h == &htab->tls_get_addr_fd->elf)
8442 && !found_tls_get_addr_arg
8443 && is_branch_reloc (r_type))
8444 {
8445 info->callbacks->minfo (_("%H __tls_get_addr lost arg, "
8446 "TLS optimization disabled\n"),
8447 ibfd, sec, rel->r_offset);
8448 ret = TRUE;
8449 goto err_free_rel;
8450 }
8451
8452 found_tls_get_addr_arg = 0;
8453 switch (r_type)
8454 {
8455 case R_PPC64_GOT_TLSLD16:
8456 case R_PPC64_GOT_TLSLD16_LO:
8457 expecting_tls_get_addr = 1;
8458 found_tls_get_addr_arg = 1;
8459 /* Fall thru */
8460
8461 case R_PPC64_GOT_TLSLD16_HI:
8462 case R_PPC64_GOT_TLSLD16_HA:
8463 /* These relocs should never be against a symbol
8464 defined in a shared lib. Leave them alone if
8465 that turns out to be the case. */
8466 if (!is_local)
8467 continue;
8468
8469 /* LD -> LE */
8470 tls_set = 0;
8471 tls_clear = TLS_LD;
8472 tls_type = TLS_TLS | TLS_LD;
8473 break;
8474
8475 case R_PPC64_GOT_TLSGD16:
8476 case R_PPC64_GOT_TLSGD16_LO:
8477 expecting_tls_get_addr = 1;
8478 found_tls_get_addr_arg = 1;
8479 /* Fall thru */
8480
8481 case R_PPC64_GOT_TLSGD16_HI:
8482 case R_PPC64_GOT_TLSGD16_HA:
8483 if (ok_tprel)
8484 /* GD -> LE */
8485 tls_set = 0;
8486 else
8487 /* GD -> IE */
8488 tls_set = TLS_TLS | TLS_TPRELGD;
8489 tls_clear = TLS_GD;
8490 tls_type = TLS_TLS | TLS_GD;
8491 break;
8492
8493 case R_PPC64_GOT_TPREL16_DS:
8494 case R_PPC64_GOT_TPREL16_LO_DS:
8495 case R_PPC64_GOT_TPREL16_HI:
8496 case R_PPC64_GOT_TPREL16_HA:
8497 if (ok_tprel)
8498 {
8499 /* IE -> LE */
8500 tls_set = 0;
8501 tls_clear = TLS_TPREL;
8502 tls_type = TLS_TLS | TLS_TPREL;
8503 break;
8504 }
8505 continue;
8506
8507 case R_PPC64_TLSGD:
8508 case R_PPC64_TLSLD:
8509 found_tls_get_addr_arg = 1;
8510 /* Fall thru */
8511
8512 case R_PPC64_TLS:
8513 case R_PPC64_TOC16:
8514 case R_PPC64_TOC16_LO:
8515 if (sym_sec == NULL || sym_sec != toc)
8516 continue;
8517
8518 /* Mark this toc entry as referenced by a TLS
8519 code sequence. We can do that now in the
8520 case of R_PPC64_TLS, and after checking for
8521 tls_get_addr for the TOC16 relocs. */
8522 if (toc_ref == NULL)
8523 toc_ref = bfd_zmalloc (toc->output_section->rawsize / 8);
8524 if (toc_ref == NULL)
8525 goto err_free_rel;
8526
8527 if (h != NULL)
8528 value = h->root.u.def.value;
8529 else
8530 value = sym->st_value;
8531 value += rel->r_addend;
8532 if (value % 8 != 0)
8533 continue;
8534 BFD_ASSERT (value < toc->size
8535 && toc->output_offset % 8 == 0);
8536 toc_ref_index = (value + toc->output_offset) / 8;
8537 if (r_type == R_PPC64_TLS
8538 || r_type == R_PPC64_TLSGD
8539 || r_type == R_PPC64_TLSLD)
8540 {
8541 toc_ref[toc_ref_index] = 1;
8542 continue;
8543 }
8544
8545 if (pass != 0 && toc_ref[toc_ref_index] == 0)
8546 continue;
8547
8548 tls_set = 0;
8549 tls_clear = 0;
8550 expecting_tls_get_addr = 2;
8551 break;
8552
8553 case R_PPC64_TPREL64:
8554 if (pass == 0
8555 || sec != toc
8556 || toc_ref == NULL
8557 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
8558 continue;
8559 if (ok_tprel)
8560 {
8561 /* IE -> LE */
8562 tls_set = TLS_EXPLICIT;
8563 tls_clear = TLS_TPREL;
8564 break;
8565 }
8566 continue;
8567
8568 case R_PPC64_DTPMOD64:
8569 if (pass == 0
8570 || sec != toc
8571 || toc_ref == NULL
8572 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
8573 continue;
8574 if (rel + 1 < relend
8575 && (rel[1].r_info
8576 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
8577 && rel[1].r_offset == rel->r_offset + 8)
8578 {
8579 if (ok_tprel)
8580 /* GD -> LE */
8581 tls_set = TLS_EXPLICIT | TLS_GD;
8582 else
8583 /* GD -> IE */
8584 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
8585 tls_clear = TLS_GD;
8586 }
8587 else
8588 {
8589 if (!is_local)
8590 continue;
8591
8592 /* LD -> LE */
8593 tls_set = TLS_EXPLICIT;
8594 tls_clear = TLS_LD;
8595 }
8596 break;
8597
8598 default:
8599 continue;
8600 }
8601
8602 if (pass == 0)
8603 {
8604 if (!expecting_tls_get_addr
8605 || !sec->has_tls_get_addr_call)
8606 continue;
8607
8608 if (rel + 1 < relend
8609 && branch_reloc_hash_match (ibfd, rel + 1,
8610 htab->tls_get_addr,
8611 htab->tls_get_addr_fd))
8612 {
8613 if (expecting_tls_get_addr == 2)
8614 {
8615 /* Check for toc tls entries. */
8616 unsigned char *toc_tls;
8617 int retval;
8618
8619 retval = get_tls_mask (&toc_tls, NULL, NULL,
8620 &locsyms,
8621 rel, ibfd);
8622 if (retval == 0)
8623 goto err_free_rel;
8624 if (toc_tls != NULL)
8625 {
8626 if ((*toc_tls & (TLS_GD | TLS_LD)) != 0)
8627 found_tls_get_addr_arg = 1;
8628 if (retval > 1)
8629 toc_ref[toc_ref_index] = 1;
8630 }
8631 }
8632 continue;
8633 }
8634
8635 if (expecting_tls_get_addr != 1)
8636 continue;
8637
8638 /* Uh oh, we didn't find the expected call. We
8639 could just mark this symbol to exclude it
8640 from tls optimization but it's safer to skip
8641 the entire optimization. */
8642 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
8643 "TLS optimization disabled\n"),
8644 ibfd, sec, rel->r_offset);
8645 ret = TRUE;
8646 goto err_free_rel;
8647 }
8648
8649 if (expecting_tls_get_addr && htab->tls_get_addr != NULL)
8650 {
8651 struct plt_entry *ent;
8652 for (ent = htab->tls_get_addr->elf.plt.plist;
8653 ent != NULL;
8654 ent = ent->next)
8655 if (ent->addend == 0)
8656 {
8657 if (ent->plt.refcount > 0)
8658 {
8659 ent->plt.refcount -= 1;
8660 expecting_tls_get_addr = 0;
8661 }
8662 break;
8663 }
8664 }
8665
8666 if (expecting_tls_get_addr && htab->tls_get_addr_fd != NULL)
8667 {
8668 struct plt_entry *ent;
8669 for (ent = htab->tls_get_addr_fd->elf.plt.plist;
8670 ent != NULL;
8671 ent = ent->next)
8672 if (ent->addend == 0)
8673 {
8674 if (ent->plt.refcount > 0)
8675 ent->plt.refcount -= 1;
8676 break;
8677 }
8678 }
8679
8680 if (tls_clear == 0)
8681 continue;
8682
8683 if ((tls_set & TLS_EXPLICIT) == 0)
8684 {
8685 struct got_entry *ent;
8686
8687 /* Adjust got entry for this reloc. */
8688 if (h != NULL)
8689 ent = h->got.glist;
8690 else
8691 ent = elf_local_got_ents (ibfd)[r_symndx];
8692
8693 for (; ent != NULL; ent = ent->next)
8694 if (ent->addend == rel->r_addend
8695 && ent->owner == ibfd
8696 && ent->tls_type == tls_type)
8697 break;
8698 if (ent == NULL)
8699 abort ();
8700
8701 if (tls_set == 0)
8702 {
8703 /* We managed to get rid of a got entry. */
8704 if (ent->got.refcount > 0)
8705 ent->got.refcount -= 1;
8706 }
8707 }
8708 else
8709 {
8710 /* If we got rid of a DTPMOD/DTPREL reloc pair then
8711 we'll lose one or two dyn relocs. */
8712 if (!dec_dynrel_count (rel->r_info, sec, info,
8713 NULL, h, sym))
8714 return FALSE;
8715
8716 if (tls_set == (TLS_EXPLICIT | TLS_GD))
8717 {
8718 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
8719 NULL, h, sym))
8720 return FALSE;
8721 }
8722 }
8723
8724 *tls_mask |= tls_set;
8725 *tls_mask &= ~tls_clear;
8726 }
8727
8728 if (elf_section_data (sec)->relocs != relstart)
8729 free (relstart);
8730 }
8731
8732 if (locsyms != NULL
8733 && (elf_symtab_hdr (ibfd).contents != (unsigned char *) locsyms))
8734 {
8735 if (!info->keep_memory)
8736 free (locsyms);
8737 else
8738 elf_symtab_hdr (ibfd).contents = (unsigned char *) locsyms;
8739 }
8740 }
8741
8742 if (toc_ref != NULL)
8743 free (toc_ref);
8744 return TRUE;
8745 }
8746
8747 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
8748 the values of any global symbols in a toc section that has been
8749 edited. Globals in toc sections should be a rarity, so this function
8750 sets a flag if any are found in toc sections other than the one just
8751 edited, so that futher hash table traversals can be avoided. */
8752
8753 struct adjust_toc_info
8754 {
8755 asection *toc;
8756 unsigned long *skip;
8757 bfd_boolean global_toc_syms;
8758 };
8759
8760 enum toc_skip_enum { ref_from_discarded = 1, can_optimize = 2 };
8761
8762 static bfd_boolean
8763 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
8764 {
8765 struct ppc_link_hash_entry *eh;
8766 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
8767 unsigned long i;
8768
8769 if (h->root.type != bfd_link_hash_defined
8770 && h->root.type != bfd_link_hash_defweak)
8771 return TRUE;
8772
8773 eh = (struct ppc_link_hash_entry *) h;
8774 if (eh->adjust_done)
8775 return TRUE;
8776
8777 if (eh->elf.root.u.def.section == toc_inf->toc)
8778 {
8779 if (eh->elf.root.u.def.value > toc_inf->toc->rawsize)
8780 i = toc_inf->toc->rawsize >> 3;
8781 else
8782 i = eh->elf.root.u.def.value >> 3;
8783
8784 if ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0)
8785 {
8786 (*_bfd_error_handler)
8787 (_("%s defined on removed toc entry"), eh->elf.root.root.string);
8788 do
8789 ++i;
8790 while ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0);
8791 eh->elf.root.u.def.value = (bfd_vma) i << 3;
8792 }
8793
8794 eh->elf.root.u.def.value -= toc_inf->skip[i];
8795 eh->adjust_done = 1;
8796 }
8797 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
8798 toc_inf->global_toc_syms = TRUE;
8799
8800 return TRUE;
8801 }
8802
8803 /* Return TRUE iff INSN is one we expect on a _LO variety toc/got reloc. */
8804
8805 static bfd_boolean
8806 ok_lo_toc_insn (unsigned int insn)
8807 {
8808 return ((insn & (0x3f << 26)) == 14u << 26 /* addi */
8809 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
8810 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
8811 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
8812 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
8813 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
8814 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
8815 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
8816 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
8817 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
8818 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
8819 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
8820 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
8821 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
8822 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
8823 && (insn & 3) != 1)
8824 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
8825 && ((insn & 3) == 0 || (insn & 3) == 3))
8826 || (insn & (0x3f << 26)) == 12u << 26 /* addic */);
8827 }
8828
8829 /* Examine all relocs referencing .toc sections in order to remove
8830 unused .toc entries. */
8831
8832 bfd_boolean
8833 ppc64_elf_edit_toc (struct bfd_link_info *info)
8834 {
8835 bfd *ibfd;
8836 struct adjust_toc_info toc_inf;
8837 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8838
8839 htab->do_toc_opt = 1;
8840 toc_inf.global_toc_syms = TRUE;
8841 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
8842 {
8843 asection *toc, *sec;
8844 Elf_Internal_Shdr *symtab_hdr;
8845 Elf_Internal_Sym *local_syms;
8846 Elf_Internal_Rela *relstart, *rel, *toc_relocs;
8847 unsigned long *skip, *drop;
8848 unsigned char *used;
8849 unsigned char *keep, last, some_unused;
8850
8851 if (!is_ppc64_elf (ibfd))
8852 continue;
8853
8854 toc = bfd_get_section_by_name (ibfd, ".toc");
8855 if (toc == NULL
8856 || toc->size == 0
8857 || toc->sec_info_type == SEC_INFO_TYPE_JUST_SYMS
8858 || discarded_section (toc))
8859 continue;
8860
8861 toc_relocs = NULL;
8862 local_syms = NULL;
8863 symtab_hdr = &elf_symtab_hdr (ibfd);
8864
8865 /* Look at sections dropped from the final link. */
8866 skip = NULL;
8867 relstart = NULL;
8868 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8869 {
8870 if (sec->reloc_count == 0
8871 || !discarded_section (sec)
8872 || get_opd_info (sec)
8873 || (sec->flags & SEC_ALLOC) == 0
8874 || (sec->flags & SEC_DEBUGGING) != 0)
8875 continue;
8876
8877 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
8878 if (relstart == NULL)
8879 goto error_ret;
8880
8881 /* Run through the relocs to see which toc entries might be
8882 unused. */
8883 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8884 {
8885 enum elf_ppc64_reloc_type r_type;
8886 unsigned long r_symndx;
8887 asection *sym_sec;
8888 struct elf_link_hash_entry *h;
8889 Elf_Internal_Sym *sym;
8890 bfd_vma val;
8891
8892 r_type = ELF64_R_TYPE (rel->r_info);
8893 switch (r_type)
8894 {
8895 default:
8896 continue;
8897
8898 case R_PPC64_TOC16:
8899 case R_PPC64_TOC16_LO:
8900 case R_PPC64_TOC16_HI:
8901 case R_PPC64_TOC16_HA:
8902 case R_PPC64_TOC16_DS:
8903 case R_PPC64_TOC16_LO_DS:
8904 break;
8905 }
8906
8907 r_symndx = ELF64_R_SYM (rel->r_info);
8908 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8909 r_symndx, ibfd))
8910 goto error_ret;
8911
8912 if (sym_sec != toc)
8913 continue;
8914
8915 if (h != NULL)
8916 val = h->root.u.def.value;
8917 else
8918 val = sym->st_value;
8919 val += rel->r_addend;
8920
8921 if (val >= toc->size)
8922 continue;
8923
8924 /* Anything in the toc ought to be aligned to 8 bytes.
8925 If not, don't mark as unused. */
8926 if (val & 7)
8927 continue;
8928
8929 if (skip == NULL)
8930 {
8931 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
8932 if (skip == NULL)
8933 goto error_ret;
8934 }
8935
8936 skip[val >> 3] = ref_from_discarded;
8937 }
8938
8939 if (elf_section_data (sec)->relocs != relstart)
8940 free (relstart);
8941 }
8942
8943 /* For largetoc loads of address constants, we can convert
8944 . addis rx,2,addr@got@ha
8945 . ld ry,addr@got@l(rx)
8946 to
8947 . addis rx,2,addr@toc@ha
8948 . addi ry,rx,addr@toc@l
8949 when addr is within 2G of the toc pointer. This then means
8950 that the word storing "addr" in the toc is no longer needed. */
8951
8952 if (!ppc64_elf_tdata (ibfd)->has_small_toc_reloc
8953 && toc->output_section->rawsize < (bfd_vma) 1 << 31
8954 && toc->reloc_count != 0)
8955 {
8956 /* Read toc relocs. */
8957 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
8958 info->keep_memory);
8959 if (toc_relocs == NULL)
8960 goto error_ret;
8961
8962 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
8963 {
8964 enum elf_ppc64_reloc_type r_type;
8965 unsigned long r_symndx;
8966 asection *sym_sec;
8967 struct elf_link_hash_entry *h;
8968 Elf_Internal_Sym *sym;
8969 bfd_vma val, addr;
8970
8971 r_type = ELF64_R_TYPE (rel->r_info);
8972 if (r_type != R_PPC64_ADDR64)
8973 continue;
8974
8975 r_symndx = ELF64_R_SYM (rel->r_info);
8976 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8977 r_symndx, ibfd))
8978 goto error_ret;
8979
8980 if (sym_sec == NULL
8981 || sym_sec->output_section == NULL
8982 || discarded_section (sym_sec))
8983 continue;
8984
8985 if (!SYMBOL_REFERENCES_LOCAL (info, h))
8986 continue;
8987
8988 if (h != NULL)
8989 {
8990 if (h->type == STT_GNU_IFUNC)
8991 continue;
8992 val = h->root.u.def.value;
8993 }
8994 else
8995 {
8996 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
8997 continue;
8998 val = sym->st_value;
8999 }
9000 val += rel->r_addend;
9001 val += sym_sec->output_section->vma + sym_sec->output_offset;
9002
9003 /* We don't yet know the exact toc pointer value, but we
9004 know it will be somewhere in the toc section. Don't
9005 optimize if the difference from any possible toc
9006 pointer is outside [ff..f80008000, 7fff7fff]. */
9007 addr = toc->output_section->vma + TOC_BASE_OFF;
9008 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
9009 continue;
9010
9011 addr = toc->output_section->vma + toc->output_section->rawsize;
9012 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
9013 continue;
9014
9015 if (skip == NULL)
9016 {
9017 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
9018 if (skip == NULL)
9019 goto error_ret;
9020 }
9021
9022 skip[rel->r_offset >> 3]
9023 |= can_optimize | ((rel - toc_relocs) << 2);
9024 }
9025 }
9026
9027 if (skip == NULL)
9028 continue;
9029
9030 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
9031 if (used == NULL)
9032 {
9033 error_ret:
9034 if (local_syms != NULL
9035 && symtab_hdr->contents != (unsigned char *) local_syms)
9036 free (local_syms);
9037 if (sec != NULL
9038 && relstart != NULL
9039 && elf_section_data (sec)->relocs != relstart)
9040 free (relstart);
9041 if (toc_relocs != NULL
9042 && elf_section_data (toc)->relocs != toc_relocs)
9043 free (toc_relocs);
9044 if (skip != NULL)
9045 free (skip);
9046 return FALSE;
9047 }
9048
9049 /* Now check all kept sections that might reference the toc.
9050 Check the toc itself last. */
9051 for (sec = (ibfd->sections == toc && toc->next ? toc->next
9052 : ibfd->sections);
9053 sec != NULL;
9054 sec = (sec == toc ? NULL
9055 : sec->next == NULL ? toc
9056 : sec->next == toc && toc->next ? toc->next
9057 : sec->next))
9058 {
9059 int repeat;
9060
9061 if (sec->reloc_count == 0
9062 || discarded_section (sec)
9063 || get_opd_info (sec)
9064 || (sec->flags & SEC_ALLOC) == 0
9065 || (sec->flags & SEC_DEBUGGING) != 0)
9066 continue;
9067
9068 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
9069 info->keep_memory);
9070 if (relstart == NULL)
9071 {
9072 free (used);
9073 goto error_ret;
9074 }
9075
9076 /* Mark toc entries referenced as used. */
9077 do
9078 {
9079 repeat = 0;
9080 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
9081 {
9082 enum elf_ppc64_reloc_type r_type;
9083 unsigned long r_symndx;
9084 asection *sym_sec;
9085 struct elf_link_hash_entry *h;
9086 Elf_Internal_Sym *sym;
9087 bfd_vma val;
9088 enum {no_check, check_lo, check_ha} insn_check;
9089
9090 r_type = ELF64_R_TYPE (rel->r_info);
9091 switch (r_type)
9092 {
9093 default:
9094 insn_check = no_check;
9095 break;
9096
9097 case R_PPC64_GOT_TLSLD16_HA:
9098 case R_PPC64_GOT_TLSGD16_HA:
9099 case R_PPC64_GOT_TPREL16_HA:
9100 case R_PPC64_GOT_DTPREL16_HA:
9101 case R_PPC64_GOT16_HA:
9102 case R_PPC64_TOC16_HA:
9103 insn_check = check_ha;
9104 break;
9105
9106 case R_PPC64_GOT_TLSLD16_LO:
9107 case R_PPC64_GOT_TLSGD16_LO:
9108 case R_PPC64_GOT_TPREL16_LO_DS:
9109 case R_PPC64_GOT_DTPREL16_LO_DS:
9110 case R_PPC64_GOT16_LO:
9111 case R_PPC64_GOT16_LO_DS:
9112 case R_PPC64_TOC16_LO:
9113 case R_PPC64_TOC16_LO_DS:
9114 insn_check = check_lo;
9115 break;
9116 }
9117
9118 if (insn_check != no_check)
9119 {
9120 bfd_vma off = rel->r_offset & ~3;
9121 unsigned char buf[4];
9122 unsigned int insn;
9123
9124 if (!bfd_get_section_contents (ibfd, sec, buf, off, 4))
9125 {
9126 free (used);
9127 goto error_ret;
9128 }
9129 insn = bfd_get_32 (ibfd, buf);
9130 if (insn_check == check_lo
9131 ? !ok_lo_toc_insn (insn)
9132 : ((insn & ((0x3f << 26) | 0x1f << 16))
9133 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */))
9134 {
9135 char str[12];
9136
9137 ppc64_elf_tdata (ibfd)->unexpected_toc_insn = 1;
9138 sprintf (str, "%#08x", insn);
9139 info->callbacks->einfo
9140 (_("%P: %H: toc optimization is not supported for"
9141 " %s instruction.\n"),
9142 ibfd, sec, rel->r_offset & ~3, str);
9143 }
9144 }
9145
9146 switch (r_type)
9147 {
9148 case R_PPC64_TOC16:
9149 case R_PPC64_TOC16_LO:
9150 case R_PPC64_TOC16_HI:
9151 case R_PPC64_TOC16_HA:
9152 case R_PPC64_TOC16_DS:
9153 case R_PPC64_TOC16_LO_DS:
9154 /* In case we're taking addresses of toc entries. */
9155 case R_PPC64_ADDR64:
9156 break;
9157
9158 default:
9159 continue;
9160 }
9161
9162 r_symndx = ELF64_R_SYM (rel->r_info);
9163 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9164 r_symndx, ibfd))
9165 {
9166 free (used);
9167 goto error_ret;
9168 }
9169
9170 if (sym_sec != toc)
9171 continue;
9172
9173 if (h != NULL)
9174 val = h->root.u.def.value;
9175 else
9176 val = sym->st_value;
9177 val += rel->r_addend;
9178
9179 if (val >= toc->size)
9180 continue;
9181
9182 if ((skip[val >> 3] & can_optimize) != 0)
9183 {
9184 bfd_vma off;
9185 unsigned char opc;
9186
9187 switch (r_type)
9188 {
9189 case R_PPC64_TOC16_HA:
9190 break;
9191
9192 case R_PPC64_TOC16_LO_DS:
9193 off = rel->r_offset;
9194 off += (bfd_big_endian (ibfd) ? -2 : 3);
9195 if (!bfd_get_section_contents (ibfd, sec, &opc,
9196 off, 1))
9197 {
9198 free (used);
9199 goto error_ret;
9200 }
9201 if ((opc & (0x3f << 2)) == (58u << 2))
9202 break;
9203 /* Fall thru */
9204
9205 default:
9206 /* Wrong sort of reloc, or not a ld. We may
9207 as well clear ref_from_discarded too. */
9208 skip[val >> 3] = 0;
9209 }
9210 }
9211
9212 if (sec != toc)
9213 used[val >> 3] = 1;
9214 /* For the toc section, we only mark as used if this
9215 entry itself isn't unused. */
9216 else if ((used[rel->r_offset >> 3]
9217 || !(skip[rel->r_offset >> 3] & ref_from_discarded))
9218 && !used[val >> 3])
9219 {
9220 /* Do all the relocs again, to catch reference
9221 chains. */
9222 repeat = 1;
9223 used[val >> 3] = 1;
9224 }
9225 }
9226 }
9227 while (repeat);
9228
9229 if (elf_section_data (sec)->relocs != relstart)
9230 free (relstart);
9231 }
9232
9233 /* Merge the used and skip arrays. Assume that TOC
9234 doublewords not appearing as either used or unused belong
9235 to to an entry more than one doubleword in size. */
9236 for (drop = skip, keep = used, last = 0, some_unused = 0;
9237 drop < skip + (toc->size + 7) / 8;
9238 ++drop, ++keep)
9239 {
9240 if (*keep)
9241 {
9242 *drop &= ~ref_from_discarded;
9243 if ((*drop & can_optimize) != 0)
9244 some_unused = 1;
9245 last = 0;
9246 }
9247 else if ((*drop & ref_from_discarded) != 0)
9248 {
9249 some_unused = 1;
9250 last = ref_from_discarded;
9251 }
9252 else
9253 *drop = last;
9254 }
9255
9256 free (used);
9257
9258 if (some_unused)
9259 {
9260 bfd_byte *contents, *src;
9261 unsigned long off;
9262 Elf_Internal_Sym *sym;
9263 bfd_boolean local_toc_syms = FALSE;
9264
9265 /* Shuffle the toc contents, and at the same time convert the
9266 skip array from booleans into offsets. */
9267 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
9268 goto error_ret;
9269
9270 elf_section_data (toc)->this_hdr.contents = contents;
9271
9272 for (src = contents, off = 0, drop = skip;
9273 src < contents + toc->size;
9274 src += 8, ++drop)
9275 {
9276 if ((*drop & (can_optimize | ref_from_discarded)) != 0)
9277 off += 8;
9278 else if (off != 0)
9279 {
9280 *drop = off;
9281 memcpy (src - off, src, 8);
9282 }
9283 }
9284 *drop = off;
9285 toc->rawsize = toc->size;
9286 toc->size = src - contents - off;
9287
9288 /* Adjust addends for relocs against the toc section sym,
9289 and optimize any accesses we can. */
9290 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
9291 {
9292 if (sec->reloc_count == 0
9293 || discarded_section (sec))
9294 continue;
9295
9296 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
9297 info->keep_memory);
9298 if (relstart == NULL)
9299 goto error_ret;
9300
9301 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
9302 {
9303 enum elf_ppc64_reloc_type r_type;
9304 unsigned long r_symndx;
9305 asection *sym_sec;
9306 struct elf_link_hash_entry *h;
9307 bfd_vma val;
9308
9309 r_type = ELF64_R_TYPE (rel->r_info);
9310 switch (r_type)
9311 {
9312 default:
9313 continue;
9314
9315 case R_PPC64_TOC16:
9316 case R_PPC64_TOC16_LO:
9317 case R_PPC64_TOC16_HI:
9318 case R_PPC64_TOC16_HA:
9319 case R_PPC64_TOC16_DS:
9320 case R_PPC64_TOC16_LO_DS:
9321 case R_PPC64_ADDR64:
9322 break;
9323 }
9324
9325 r_symndx = ELF64_R_SYM (rel->r_info);
9326 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9327 r_symndx, ibfd))
9328 goto error_ret;
9329
9330 if (sym_sec != toc)
9331 continue;
9332
9333 if (h != NULL)
9334 val = h->root.u.def.value;
9335 else
9336 {
9337 val = sym->st_value;
9338 if (val != 0)
9339 local_toc_syms = TRUE;
9340 }
9341
9342 val += rel->r_addend;
9343
9344 if (val > toc->rawsize)
9345 val = toc->rawsize;
9346 else if ((skip[val >> 3] & ref_from_discarded) != 0)
9347 continue;
9348 else if ((skip[val >> 3] & can_optimize) != 0)
9349 {
9350 Elf_Internal_Rela *tocrel
9351 = toc_relocs + (skip[val >> 3] >> 2);
9352 unsigned long tsym = ELF64_R_SYM (tocrel->r_info);
9353
9354 switch (r_type)
9355 {
9356 case R_PPC64_TOC16_HA:
9357 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_TOC16_HA);
9358 break;
9359
9360 case R_PPC64_TOC16_LO_DS:
9361 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_LO_DS_OPT);
9362 break;
9363
9364 default:
9365 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
9366 ppc_howto_init ();
9367 info->callbacks->einfo
9368 (_("%P: %H: %s references "
9369 "optimized away TOC entry\n"),
9370 ibfd, sec, rel->r_offset,
9371 ppc64_elf_howto_table[r_type]->name);
9372 bfd_set_error (bfd_error_bad_value);
9373 goto error_ret;
9374 }
9375 rel->r_addend = tocrel->r_addend;
9376 elf_section_data (sec)->relocs = relstart;
9377 continue;
9378 }
9379
9380 if (h != NULL || sym->st_value != 0)
9381 continue;
9382
9383 rel->r_addend -= skip[val >> 3];
9384 elf_section_data (sec)->relocs = relstart;
9385 }
9386
9387 if (elf_section_data (sec)->relocs != relstart)
9388 free (relstart);
9389 }
9390
9391 /* We shouldn't have local or global symbols defined in the TOC,
9392 but handle them anyway. */
9393 if (local_syms != NULL)
9394 for (sym = local_syms;
9395 sym < local_syms + symtab_hdr->sh_info;
9396 ++sym)
9397 if (sym->st_value != 0
9398 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
9399 {
9400 unsigned long i;
9401
9402 if (sym->st_value > toc->rawsize)
9403 i = toc->rawsize >> 3;
9404 else
9405 i = sym->st_value >> 3;
9406
9407 if ((skip[i] & (ref_from_discarded | can_optimize)) != 0)
9408 {
9409 if (local_toc_syms)
9410 (*_bfd_error_handler)
9411 (_("%s defined on removed toc entry"),
9412 bfd_elf_sym_name (ibfd, symtab_hdr, sym, NULL));
9413 do
9414 ++i;
9415 while ((skip[i] & (ref_from_discarded | can_optimize)));
9416 sym->st_value = (bfd_vma) i << 3;
9417 }
9418
9419 sym->st_value -= skip[i];
9420 symtab_hdr->contents = (unsigned char *) local_syms;
9421 }
9422
9423 /* Adjust any global syms defined in this toc input section. */
9424 if (toc_inf.global_toc_syms)
9425 {
9426 toc_inf.toc = toc;
9427 toc_inf.skip = skip;
9428 toc_inf.global_toc_syms = FALSE;
9429 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
9430 &toc_inf);
9431 }
9432
9433 if (toc->reloc_count != 0)
9434 {
9435 Elf_Internal_Shdr *rel_hdr;
9436 Elf_Internal_Rela *wrel;
9437 bfd_size_type sz;
9438
9439 /* Remove unused toc relocs, and adjust those we keep. */
9440 if (toc_relocs == NULL)
9441 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
9442 info->keep_memory);
9443 if (toc_relocs == NULL)
9444 goto error_ret;
9445
9446 wrel = toc_relocs;
9447 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
9448 if ((skip[rel->r_offset >> 3]
9449 & (ref_from_discarded | can_optimize)) == 0)
9450 {
9451 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
9452 wrel->r_info = rel->r_info;
9453 wrel->r_addend = rel->r_addend;
9454 ++wrel;
9455 }
9456 else if (!dec_dynrel_count (rel->r_info, toc, info,
9457 &local_syms, NULL, NULL))
9458 goto error_ret;
9459
9460 elf_section_data (toc)->relocs = toc_relocs;
9461 toc->reloc_count = wrel - toc_relocs;
9462 rel_hdr = _bfd_elf_single_rel_hdr (toc);
9463 sz = rel_hdr->sh_entsize;
9464 rel_hdr->sh_size = toc->reloc_count * sz;
9465 }
9466 }
9467 else if (toc_relocs != NULL
9468 && elf_section_data (toc)->relocs != toc_relocs)
9469 free (toc_relocs);
9470
9471 if (local_syms != NULL
9472 && symtab_hdr->contents != (unsigned char *) local_syms)
9473 {
9474 if (!info->keep_memory)
9475 free (local_syms);
9476 else
9477 symtab_hdr->contents = (unsigned char *) local_syms;
9478 }
9479 free (skip);
9480 }
9481
9482 return TRUE;
9483 }
9484
9485 /* Return true iff input section I references the TOC using
9486 instructions limited to +/-32k offsets. */
9487
9488 bfd_boolean
9489 ppc64_elf_has_small_toc_reloc (asection *i)
9490 {
9491 return (is_ppc64_elf (i->owner)
9492 && ppc64_elf_tdata (i->owner)->has_small_toc_reloc);
9493 }
9494
9495 /* Allocate space for one GOT entry. */
9496
9497 static void
9498 allocate_got (struct elf_link_hash_entry *h,
9499 struct bfd_link_info *info,
9500 struct got_entry *gent)
9501 {
9502 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9503 bfd_boolean dyn;
9504 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
9505 int entsize = (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)
9506 ? 16 : 8);
9507 int rentsize = (gent->tls_type & eh->tls_mask & TLS_GD
9508 ? 2 : 1) * sizeof (Elf64_External_Rela);
9509 asection *got = ppc64_elf_tdata (gent->owner)->got;
9510
9511 gent->got.offset = got->size;
9512 got->size += entsize;
9513
9514 dyn = htab->elf.dynamic_sections_created;
9515 if (h->type == STT_GNU_IFUNC)
9516 {
9517 htab->elf.irelplt->size += rentsize;
9518 htab->got_reli_size += rentsize;
9519 }
9520 else if ((bfd_link_pic (info)
9521 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
9522 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
9523 || h->root.type != bfd_link_hash_undefweak))
9524 {
9525 asection *relgot = ppc64_elf_tdata (gent->owner)->relgot;
9526 relgot->size += rentsize;
9527 }
9528 }
9529
9530 /* This function merges got entries in the same toc group. */
9531
9532 static void
9533 merge_got_entries (struct got_entry **pent)
9534 {
9535 struct got_entry *ent, *ent2;
9536
9537 for (ent = *pent; ent != NULL; ent = ent->next)
9538 if (!ent->is_indirect)
9539 for (ent2 = ent->next; ent2 != NULL; ent2 = ent2->next)
9540 if (!ent2->is_indirect
9541 && ent2->addend == ent->addend
9542 && ent2->tls_type == ent->tls_type
9543 && elf_gp (ent2->owner) == elf_gp (ent->owner))
9544 {
9545 ent2->is_indirect = TRUE;
9546 ent2->got.ent = ent;
9547 }
9548 }
9549
9550 /* Allocate space in .plt, .got and associated reloc sections for
9551 dynamic relocs. */
9552
9553 static bfd_boolean
9554 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
9555 {
9556 struct bfd_link_info *info;
9557 struct ppc_link_hash_table *htab;
9558 asection *s;
9559 struct ppc_link_hash_entry *eh;
9560 struct elf_dyn_relocs *p;
9561 struct got_entry **pgent, *gent;
9562
9563 if (h->root.type == bfd_link_hash_indirect)
9564 return TRUE;
9565
9566 info = (struct bfd_link_info *) inf;
9567 htab = ppc_hash_table (info);
9568 if (htab == NULL)
9569 return FALSE;
9570
9571 if ((htab->elf.dynamic_sections_created
9572 && h->dynindx != -1
9573 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, bfd_link_pic (info), h))
9574 || h->type == STT_GNU_IFUNC)
9575 {
9576 struct plt_entry *pent;
9577 bfd_boolean doneone = FALSE;
9578 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
9579 if (pent->plt.refcount > 0)
9580 {
9581 if (!htab->elf.dynamic_sections_created
9582 || h->dynindx == -1)
9583 {
9584 s = htab->elf.iplt;
9585 pent->plt.offset = s->size;
9586 s->size += PLT_ENTRY_SIZE (htab);
9587 s = htab->elf.irelplt;
9588 }
9589 else
9590 {
9591 /* If this is the first .plt entry, make room for the special
9592 first entry. */
9593 s = htab->elf.splt;
9594 if (s->size == 0)
9595 s->size += PLT_INITIAL_ENTRY_SIZE (htab);
9596
9597 pent->plt.offset = s->size;
9598
9599 /* Make room for this entry. */
9600 s->size += PLT_ENTRY_SIZE (htab);
9601
9602 /* Make room for the .glink code. */
9603 s = htab->glink;
9604 if (s->size == 0)
9605 s->size += GLINK_CALL_STUB_SIZE;
9606 if (htab->opd_abi)
9607 {
9608 /* We need bigger stubs past index 32767. */
9609 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
9610 s->size += 4;
9611 s->size += 2*4;
9612 }
9613 else
9614 s->size += 4;
9615
9616 /* We also need to make an entry in the .rela.plt section. */
9617 s = htab->elf.srelplt;
9618 }
9619 s->size += sizeof (Elf64_External_Rela);
9620 doneone = TRUE;
9621 }
9622 else
9623 pent->plt.offset = (bfd_vma) -1;
9624 if (!doneone)
9625 {
9626 h->plt.plist = NULL;
9627 h->needs_plt = 0;
9628 }
9629 }
9630 else
9631 {
9632 h->plt.plist = NULL;
9633 h->needs_plt = 0;
9634 }
9635
9636 eh = (struct ppc_link_hash_entry *) h;
9637 /* Run through the TLS GD got entries first if we're changing them
9638 to TPREL. */
9639 if ((eh->tls_mask & TLS_TPRELGD) != 0)
9640 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9641 if (gent->got.refcount > 0
9642 && (gent->tls_type & TLS_GD) != 0)
9643 {
9644 /* This was a GD entry that has been converted to TPREL. If
9645 there happens to be a TPREL entry we can use that one. */
9646 struct got_entry *ent;
9647 for (ent = h->got.glist; ent != NULL; ent = ent->next)
9648 if (ent->got.refcount > 0
9649 && (ent->tls_type & TLS_TPREL) != 0
9650 && ent->addend == gent->addend
9651 && ent->owner == gent->owner)
9652 {
9653 gent->got.refcount = 0;
9654 break;
9655 }
9656
9657 /* If not, then we'll be using our own TPREL entry. */
9658 if (gent->got.refcount != 0)
9659 gent->tls_type = TLS_TLS | TLS_TPREL;
9660 }
9661
9662 /* Remove any list entry that won't generate a word in the GOT before
9663 we call merge_got_entries. Otherwise we risk merging to empty
9664 entries. */
9665 pgent = &h->got.glist;
9666 while ((gent = *pgent) != NULL)
9667 if (gent->got.refcount > 0)
9668 {
9669 if ((gent->tls_type & TLS_LD) != 0
9670 && !h->def_dynamic)
9671 {
9672 ppc64_tlsld_got (gent->owner)->got.refcount += 1;
9673 *pgent = gent->next;
9674 }
9675 else
9676 pgent = &gent->next;
9677 }
9678 else
9679 *pgent = gent->next;
9680
9681 if (!htab->do_multi_toc)
9682 merge_got_entries (&h->got.glist);
9683
9684 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9685 if (!gent->is_indirect)
9686 {
9687 /* Make sure this symbol is output as a dynamic symbol.
9688 Undefined weak syms won't yet be marked as dynamic,
9689 nor will all TLS symbols. */
9690 if (h->dynindx == -1
9691 && !h->forced_local
9692 && h->type != STT_GNU_IFUNC
9693 && htab->elf.dynamic_sections_created)
9694 {
9695 if (! bfd_elf_link_record_dynamic_symbol (info, h))
9696 return FALSE;
9697 }
9698
9699 if (!is_ppc64_elf (gent->owner))
9700 abort ();
9701
9702 allocate_got (h, info, gent);
9703 }
9704
9705 if (eh->dyn_relocs == NULL
9706 || (!htab->elf.dynamic_sections_created
9707 && h->type != STT_GNU_IFUNC))
9708 return TRUE;
9709
9710 /* In the shared -Bsymbolic case, discard space allocated for
9711 dynamic pc-relative relocs against symbols which turn out to be
9712 defined in regular objects. For the normal shared case, discard
9713 space for relocs that have become local due to symbol visibility
9714 changes. */
9715
9716 if (bfd_link_pic (info))
9717 {
9718 /* Relocs that use pc_count are those that appear on a call insn,
9719 or certain REL relocs (see must_be_dyn_reloc) that can be
9720 generated via assembly. We want calls to protected symbols to
9721 resolve directly to the function rather than going via the plt.
9722 If people want function pointer comparisons to work as expected
9723 then they should avoid writing weird assembly. */
9724 if (SYMBOL_CALLS_LOCAL (info, h))
9725 {
9726 struct elf_dyn_relocs **pp;
9727
9728 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
9729 {
9730 p->count -= p->pc_count;
9731 p->pc_count = 0;
9732 if (p->count == 0)
9733 *pp = p->next;
9734 else
9735 pp = &p->next;
9736 }
9737 }
9738
9739 /* Also discard relocs on undefined weak syms with non-default
9740 visibility. */
9741 if (eh->dyn_relocs != NULL
9742 && h->root.type == bfd_link_hash_undefweak)
9743 {
9744 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
9745 eh->dyn_relocs = NULL;
9746
9747 /* Make sure this symbol is output as a dynamic symbol.
9748 Undefined weak syms won't yet be marked as dynamic. */
9749 else if (h->dynindx == -1
9750 && !h->forced_local)
9751 {
9752 if (! bfd_elf_link_record_dynamic_symbol (info, h))
9753 return FALSE;
9754 }
9755 }
9756 }
9757 else if (h->type == STT_GNU_IFUNC)
9758 {
9759 if (!h->non_got_ref)
9760 eh->dyn_relocs = NULL;
9761 }
9762 else if (ELIMINATE_COPY_RELOCS)
9763 {
9764 /* For the non-shared case, discard space for relocs against
9765 symbols which turn out to need copy relocs or are not
9766 dynamic. */
9767
9768 if (!h->non_got_ref
9769 && !h->def_regular)
9770 {
9771 /* Make sure this symbol is output as a dynamic symbol.
9772 Undefined weak syms won't yet be marked as dynamic. */
9773 if (h->dynindx == -1
9774 && !h->forced_local)
9775 {
9776 if (! bfd_elf_link_record_dynamic_symbol (info, h))
9777 return FALSE;
9778 }
9779
9780 /* If that succeeded, we know we'll be keeping all the
9781 relocs. */
9782 if (h->dynindx != -1)
9783 goto keep;
9784 }
9785
9786 eh->dyn_relocs = NULL;
9787
9788 keep: ;
9789 }
9790
9791 /* Finally, allocate space. */
9792 for (p = eh->dyn_relocs; p != NULL; p = p->next)
9793 {
9794 asection *sreloc = elf_section_data (p->sec)->sreloc;
9795 if (eh->elf.type == STT_GNU_IFUNC)
9796 sreloc = htab->elf.irelplt;
9797 sreloc->size += p->count * sizeof (Elf64_External_Rela);
9798 }
9799
9800 return TRUE;
9801 }
9802
9803 /* Called via elf_link_hash_traverse from ppc64_elf_size_dynamic_sections
9804 to set up space for global entry stubs. These are put in glink,
9805 after the branch table. */
9806
9807 static bfd_boolean
9808 size_global_entry_stubs (struct elf_link_hash_entry *h, void *inf)
9809 {
9810 struct bfd_link_info *info;
9811 struct ppc_link_hash_table *htab;
9812 struct plt_entry *pent;
9813 asection *s;
9814
9815 if (h->root.type == bfd_link_hash_indirect)
9816 return TRUE;
9817
9818 if (!h->pointer_equality_needed)
9819 return TRUE;
9820
9821 if (h->def_regular)
9822 return TRUE;
9823
9824 info = inf;
9825 htab = ppc_hash_table (info);
9826 if (htab == NULL)
9827 return FALSE;
9828
9829 s = htab->glink;
9830 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
9831 if (pent->plt.offset != (bfd_vma) -1
9832 && pent->addend == 0)
9833 {
9834 /* For ELFv2, if this symbol is not defined in a regular file
9835 and we are not generating a shared library or pie, then we
9836 need to define the symbol in the executable on a call stub.
9837 This is to avoid text relocations. */
9838 s->size = (s->size + 15) & -16;
9839 h->root.u.def.section = s;
9840 h->root.u.def.value = s->size;
9841 s->size += 16;
9842 break;
9843 }
9844 return TRUE;
9845 }
9846
9847 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
9848 read-only sections. */
9849
9850 static bfd_boolean
9851 maybe_set_textrel (struct elf_link_hash_entry *h, void *info)
9852 {
9853 if (h->root.type == bfd_link_hash_indirect)
9854 return TRUE;
9855
9856 if (readonly_dynrelocs (h))
9857 {
9858 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
9859
9860 /* Not an error, just cut short the traversal. */
9861 return FALSE;
9862 }
9863 return TRUE;
9864 }
9865
9866 /* Set the sizes of the dynamic sections. */
9867
9868 static bfd_boolean
9869 ppc64_elf_size_dynamic_sections (bfd *output_bfd,
9870 struct bfd_link_info *info)
9871 {
9872 struct ppc_link_hash_table *htab;
9873 bfd *dynobj;
9874 asection *s;
9875 bfd_boolean relocs;
9876 bfd *ibfd;
9877 struct got_entry *first_tlsld;
9878
9879 htab = ppc_hash_table (info);
9880 if (htab == NULL)
9881 return FALSE;
9882
9883 dynobj = htab->elf.dynobj;
9884 if (dynobj == NULL)
9885 abort ();
9886
9887 if (htab->elf.dynamic_sections_created)
9888 {
9889 /* Set the contents of the .interp section to the interpreter. */
9890 if (bfd_link_executable (info) && !info->nointerp)
9891 {
9892 s = bfd_get_linker_section (dynobj, ".interp");
9893 if (s == NULL)
9894 abort ();
9895 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
9896 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
9897 }
9898 }
9899
9900 /* Set up .got offsets for local syms, and space for local dynamic
9901 relocs. */
9902 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
9903 {
9904 struct got_entry **lgot_ents;
9905 struct got_entry **end_lgot_ents;
9906 struct plt_entry **local_plt;
9907 struct plt_entry **end_local_plt;
9908 unsigned char *lgot_masks;
9909 bfd_size_type locsymcount;
9910 Elf_Internal_Shdr *symtab_hdr;
9911
9912 if (!is_ppc64_elf (ibfd))
9913 continue;
9914
9915 for (s = ibfd->sections; s != NULL; s = s->next)
9916 {
9917 struct ppc_dyn_relocs *p;
9918
9919 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
9920 {
9921 if (!bfd_is_abs_section (p->sec)
9922 && bfd_is_abs_section (p->sec->output_section))
9923 {
9924 /* Input section has been discarded, either because
9925 it is a copy of a linkonce section or due to
9926 linker script /DISCARD/, so we'll be discarding
9927 the relocs too. */
9928 }
9929 else if (p->count != 0)
9930 {
9931 asection *srel = elf_section_data (p->sec)->sreloc;
9932 if (p->ifunc)
9933 srel = htab->elf.irelplt;
9934 srel->size += p->count * sizeof (Elf64_External_Rela);
9935 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
9936 info->flags |= DF_TEXTREL;
9937 }
9938 }
9939 }
9940
9941 lgot_ents = elf_local_got_ents (ibfd);
9942 if (!lgot_ents)
9943 continue;
9944
9945 symtab_hdr = &elf_symtab_hdr (ibfd);
9946 locsymcount = symtab_hdr->sh_info;
9947 end_lgot_ents = lgot_ents + locsymcount;
9948 local_plt = (struct plt_entry **) end_lgot_ents;
9949 end_local_plt = local_plt + locsymcount;
9950 lgot_masks = (unsigned char *) end_local_plt;
9951 s = ppc64_elf_tdata (ibfd)->got;
9952 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
9953 {
9954 struct got_entry **pent, *ent;
9955
9956 pent = lgot_ents;
9957 while ((ent = *pent) != NULL)
9958 if (ent->got.refcount > 0)
9959 {
9960 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
9961 {
9962 ppc64_tlsld_got (ibfd)->got.refcount += 1;
9963 *pent = ent->next;
9964 }
9965 else
9966 {
9967 unsigned int ent_size = 8;
9968 unsigned int rel_size = sizeof (Elf64_External_Rela);
9969
9970 ent->got.offset = s->size;
9971 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
9972 {
9973 ent_size *= 2;
9974 rel_size *= 2;
9975 }
9976 s->size += ent_size;
9977 if ((*lgot_masks & PLT_IFUNC) != 0)
9978 {
9979 htab->elf.irelplt->size += rel_size;
9980 htab->got_reli_size += rel_size;
9981 }
9982 else if (bfd_link_pic (info))
9983 {
9984 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
9985 srel->size += rel_size;
9986 }
9987 pent = &ent->next;
9988 }
9989 }
9990 else
9991 *pent = ent->next;
9992 }
9993
9994 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
9995 for (; local_plt < end_local_plt; ++local_plt)
9996 {
9997 struct plt_entry *ent;
9998
9999 for (ent = *local_plt; ent != NULL; ent = ent->next)
10000 if (ent->plt.refcount > 0)
10001 {
10002 s = htab->elf.iplt;
10003 ent->plt.offset = s->size;
10004 s->size += PLT_ENTRY_SIZE (htab);
10005
10006 htab->elf.irelplt->size += sizeof (Elf64_External_Rela);
10007 }
10008 else
10009 ent->plt.offset = (bfd_vma) -1;
10010 }
10011 }
10012
10013 /* Allocate global sym .plt and .got entries, and space for global
10014 sym dynamic relocs. */
10015 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
10016 /* Stash the end of glink branch table. */
10017 if (htab->glink != NULL)
10018 htab->glink->rawsize = htab->glink->size;
10019
10020 if (!htab->opd_abi && !bfd_link_pic (info))
10021 elf_link_hash_traverse (&htab->elf, size_global_entry_stubs, info);
10022
10023 first_tlsld = NULL;
10024 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
10025 {
10026 struct got_entry *ent;
10027
10028 if (!is_ppc64_elf (ibfd))
10029 continue;
10030
10031 ent = ppc64_tlsld_got (ibfd);
10032 if (ent->got.refcount > 0)
10033 {
10034 if (!htab->do_multi_toc && first_tlsld != NULL)
10035 {
10036 ent->is_indirect = TRUE;
10037 ent->got.ent = first_tlsld;
10038 }
10039 else
10040 {
10041 if (first_tlsld == NULL)
10042 first_tlsld = ent;
10043 s = ppc64_elf_tdata (ibfd)->got;
10044 ent->got.offset = s->size;
10045 ent->owner = ibfd;
10046 s->size += 16;
10047 if (bfd_link_pic (info))
10048 {
10049 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
10050 srel->size += sizeof (Elf64_External_Rela);
10051 }
10052 }
10053 }
10054 else
10055 ent->got.offset = (bfd_vma) -1;
10056 }
10057
10058 /* We now have determined the sizes of the various dynamic sections.
10059 Allocate memory for them. */
10060 relocs = FALSE;
10061 for (s = dynobj->sections; s != NULL; s = s->next)
10062 {
10063 if ((s->flags & SEC_LINKER_CREATED) == 0)
10064 continue;
10065
10066 if (s == htab->brlt || s == htab->relbrlt)
10067 /* These haven't been allocated yet; don't strip. */
10068 continue;
10069 else if (s == htab->elf.sgot
10070 || s == htab->elf.splt
10071 || s == htab->elf.iplt
10072 || s == htab->glink
10073 || s == htab->dynbss)
10074 {
10075 /* Strip this section if we don't need it; see the
10076 comment below. */
10077 }
10078 else if (s == htab->glink_eh_frame)
10079 {
10080 if (!bfd_is_abs_section (s->output_section))
10081 /* Not sized yet. */
10082 continue;
10083 }
10084 else if (CONST_STRNEQ (s->name, ".rela"))
10085 {
10086 if (s->size != 0)
10087 {
10088 if (s != htab->elf.srelplt)
10089 relocs = TRUE;
10090
10091 /* We use the reloc_count field as a counter if we need
10092 to copy relocs into the output file. */
10093 s->reloc_count = 0;
10094 }
10095 }
10096 else
10097 {
10098 /* It's not one of our sections, so don't allocate space. */
10099 continue;
10100 }
10101
10102 if (s->size == 0)
10103 {
10104 /* If we don't need this section, strip it from the
10105 output file. This is mostly to handle .rela.bss and
10106 .rela.plt. We must create both sections in
10107 create_dynamic_sections, because they must be created
10108 before the linker maps input sections to output
10109 sections. The linker does that before
10110 adjust_dynamic_symbol is called, and it is that
10111 function which decides whether anything needs to go
10112 into these sections. */
10113 s->flags |= SEC_EXCLUDE;
10114 continue;
10115 }
10116
10117 if ((s->flags & SEC_HAS_CONTENTS) == 0)
10118 continue;
10119
10120 /* Allocate memory for the section contents. We use bfd_zalloc
10121 here in case unused entries are not reclaimed before the
10122 section's contents are written out. This should not happen,
10123 but this way if it does we get a R_PPC64_NONE reloc in .rela
10124 sections instead of garbage.
10125 We also rely on the section contents being zero when writing
10126 the GOT. */
10127 s->contents = bfd_zalloc (dynobj, s->size);
10128 if (s->contents == NULL)
10129 return FALSE;
10130 }
10131
10132 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
10133 {
10134 if (!is_ppc64_elf (ibfd))
10135 continue;
10136
10137 s = ppc64_elf_tdata (ibfd)->got;
10138 if (s != NULL && s != htab->elf.sgot)
10139 {
10140 if (s->size == 0)
10141 s->flags |= SEC_EXCLUDE;
10142 else
10143 {
10144 s->contents = bfd_zalloc (ibfd, s->size);
10145 if (s->contents == NULL)
10146 return FALSE;
10147 }
10148 }
10149 s = ppc64_elf_tdata (ibfd)->relgot;
10150 if (s != NULL)
10151 {
10152 if (s->size == 0)
10153 s->flags |= SEC_EXCLUDE;
10154 else
10155 {
10156 s->contents = bfd_zalloc (ibfd, s->size);
10157 if (s->contents == NULL)
10158 return FALSE;
10159 relocs = TRUE;
10160 s->reloc_count = 0;
10161 }
10162 }
10163 }
10164
10165 if (htab->elf.dynamic_sections_created)
10166 {
10167 bfd_boolean tls_opt;
10168
10169 /* Add some entries to the .dynamic section. We fill in the
10170 values later, in ppc64_elf_finish_dynamic_sections, but we
10171 must add the entries now so that we get the correct size for
10172 the .dynamic section. The DT_DEBUG entry is filled in by the
10173 dynamic linker and used by the debugger. */
10174 #define add_dynamic_entry(TAG, VAL) \
10175 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
10176
10177 if (bfd_link_executable (info))
10178 {
10179 if (!add_dynamic_entry (DT_DEBUG, 0))
10180 return FALSE;
10181 }
10182
10183 if (htab->elf.splt != NULL && htab->elf.splt->size != 0)
10184 {
10185 if (!add_dynamic_entry (DT_PLTGOT, 0)
10186 || !add_dynamic_entry (DT_PLTRELSZ, 0)
10187 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
10188 || !add_dynamic_entry (DT_JMPREL, 0)
10189 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
10190 return FALSE;
10191 }
10192
10193 if (NO_OPD_RELOCS && abiversion (output_bfd) <= 1)
10194 {
10195 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
10196 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
10197 return FALSE;
10198 }
10199
10200 tls_opt = (htab->params->tls_get_addr_opt
10201 && htab->tls_get_addr_fd != NULL
10202 && htab->tls_get_addr_fd->elf.plt.plist != NULL);
10203 if (tls_opt || !htab->opd_abi)
10204 {
10205 if (!add_dynamic_entry (DT_PPC64_OPT, tls_opt ? PPC64_OPT_TLS : 0))
10206 return FALSE;
10207 }
10208
10209 if (relocs)
10210 {
10211 if (!add_dynamic_entry (DT_RELA, 0)
10212 || !add_dynamic_entry (DT_RELASZ, 0)
10213 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
10214 return FALSE;
10215
10216 /* If any dynamic relocs apply to a read-only section,
10217 then we need a DT_TEXTREL entry. */
10218 if ((info->flags & DF_TEXTREL) == 0)
10219 elf_link_hash_traverse (&htab->elf, maybe_set_textrel, info);
10220
10221 if ((info->flags & DF_TEXTREL) != 0)
10222 {
10223 if (!add_dynamic_entry (DT_TEXTREL, 0))
10224 return FALSE;
10225 }
10226 }
10227 }
10228 #undef add_dynamic_entry
10229
10230 return TRUE;
10231 }
10232
10233 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
10234
10235 static bfd_boolean
10236 ppc64_elf_hash_symbol (struct elf_link_hash_entry *h)
10237 {
10238 if (h->plt.plist != NULL
10239 && !h->def_regular
10240 && !h->pointer_equality_needed)
10241 return FALSE;
10242
10243 return _bfd_elf_hash_symbol (h);
10244 }
10245
10246 /* Determine the type of stub needed, if any, for a call. */
10247
10248 static inline enum ppc_stub_type
10249 ppc_type_of_stub (asection *input_sec,
10250 const Elf_Internal_Rela *rel,
10251 struct ppc_link_hash_entry **hash,
10252 struct plt_entry **plt_ent,
10253 bfd_vma destination,
10254 unsigned long local_off)
10255 {
10256 struct ppc_link_hash_entry *h = *hash;
10257 bfd_vma location;
10258 bfd_vma branch_offset;
10259 bfd_vma max_branch_offset;
10260 enum elf_ppc64_reloc_type r_type;
10261
10262 if (h != NULL)
10263 {
10264 struct plt_entry *ent;
10265 struct ppc_link_hash_entry *fdh = h;
10266 if (h->oh != NULL
10267 && h->oh->is_func_descriptor)
10268 {
10269 fdh = ppc_follow_link (h->oh);
10270 *hash = fdh;
10271 }
10272
10273 for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next)
10274 if (ent->addend == rel->r_addend
10275 && ent->plt.offset != (bfd_vma) -1)
10276 {
10277 *plt_ent = ent;
10278 return ppc_stub_plt_call;
10279 }
10280
10281 /* Here, we know we don't have a plt entry. If we don't have a
10282 either a defined function descriptor or a defined entry symbol
10283 in a regular object file, then it is pointless trying to make
10284 any other type of stub. */
10285 if (!is_static_defined (&fdh->elf)
10286 && !is_static_defined (&h->elf))
10287 return ppc_stub_none;
10288 }
10289 else if (elf_local_got_ents (input_sec->owner) != NULL)
10290 {
10291 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (input_sec->owner);
10292 struct plt_entry **local_plt = (struct plt_entry **)
10293 elf_local_got_ents (input_sec->owner) + symtab_hdr->sh_info;
10294 unsigned long r_symndx = ELF64_R_SYM (rel->r_info);
10295
10296 if (local_plt[r_symndx] != NULL)
10297 {
10298 struct plt_entry *ent;
10299
10300 for (ent = local_plt[r_symndx]; ent != NULL; ent = ent->next)
10301 if (ent->addend == rel->r_addend
10302 && ent->plt.offset != (bfd_vma) -1)
10303 {
10304 *plt_ent = ent;
10305 return ppc_stub_plt_call;
10306 }
10307 }
10308 }
10309
10310 /* Determine where the call point is. */
10311 location = (input_sec->output_offset
10312 + input_sec->output_section->vma
10313 + rel->r_offset);
10314
10315 branch_offset = destination - location;
10316 r_type = ELF64_R_TYPE (rel->r_info);
10317
10318 /* Determine if a long branch stub is needed. */
10319 max_branch_offset = 1 << 25;
10320 if (r_type != R_PPC64_REL24)
10321 max_branch_offset = 1 << 15;
10322
10323 if (branch_offset + max_branch_offset >= 2 * max_branch_offset - local_off)
10324 /* We need a stub. Figure out whether a long_branch or plt_branch
10325 is needed later. */
10326 return ppc_stub_long_branch;
10327
10328 return ppc_stub_none;
10329 }
10330
10331 /* With power7 weakly ordered memory model, it is possible for ld.so
10332 to update a plt entry in one thread and have another thread see a
10333 stale zero toc entry. To avoid this we need some sort of acquire
10334 barrier in the call stub. One solution is to make the load of the
10335 toc word seem to appear to depend on the load of the function entry
10336 word. Another solution is to test for r2 being zero, and branch to
10337 the appropriate glink entry if so.
10338
10339 . fake dep barrier compare
10340 . ld 12,xxx(2) ld 12,xxx(2)
10341 . mtctr 12 mtctr 12
10342 . xor 11,12,12 ld 2,xxx+8(2)
10343 . add 2,2,11 cmpldi 2,0
10344 . ld 2,xxx+8(2) bnectr+
10345 . bctr b <glink_entry>
10346
10347 The solution involving the compare turns out to be faster, so
10348 that's what we use unless the branch won't reach. */
10349
10350 #define ALWAYS_USE_FAKE_DEP 0
10351 #define ALWAYS_EMIT_R2SAVE 0
10352
10353 #define PPC_LO(v) ((v) & 0xffff)
10354 #define PPC_HI(v) (((v) >> 16) & 0xffff)
10355 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
10356
10357 static inline unsigned int
10358 plt_stub_size (struct ppc_link_hash_table *htab,
10359 struct ppc_stub_hash_entry *stub_entry,
10360 bfd_vma off)
10361 {
10362 unsigned size = 12;
10363
10364 if (ALWAYS_EMIT_R2SAVE
10365 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10366 size += 4;
10367 if (PPC_HA (off) != 0)
10368 size += 4;
10369 if (htab->opd_abi)
10370 {
10371 size += 4;
10372 if (htab->params->plt_static_chain)
10373 size += 4;
10374 if (htab->params->plt_thread_safe
10375 && htab->elf.dynamic_sections_created
10376 && stub_entry->h != NULL
10377 && stub_entry->h->elf.dynindx != -1)
10378 size += 8;
10379 if (PPC_HA (off + 8 + 8 * htab->params->plt_static_chain) != PPC_HA (off))
10380 size += 4;
10381 }
10382 if (stub_entry->h != NULL
10383 && (stub_entry->h == htab->tls_get_addr_fd
10384 || stub_entry->h == htab->tls_get_addr)
10385 && htab->params->tls_get_addr_opt)
10386 size += 13 * 4;
10387 return size;
10388 }
10389
10390 /* If this stub would cross fewer 2**plt_stub_align boundaries if we align,
10391 then return the padding needed to do so. */
10392 static inline unsigned int
10393 plt_stub_pad (struct ppc_link_hash_table *htab,
10394 struct ppc_stub_hash_entry *stub_entry,
10395 bfd_vma plt_off)
10396 {
10397 int stub_align = 1 << htab->params->plt_stub_align;
10398 unsigned stub_size = plt_stub_size (htab, stub_entry, plt_off);
10399 bfd_vma stub_off = stub_entry->group->stub_sec->size;
10400
10401 if (((stub_off + stub_size - 1) & -stub_align) - (stub_off & -stub_align)
10402 > ((stub_size - 1) & -stub_align))
10403 return stub_align - (stub_off & (stub_align - 1));
10404 return 0;
10405 }
10406
10407 /* Build a .plt call stub. */
10408
10409 static inline bfd_byte *
10410 build_plt_stub (struct ppc_link_hash_table *htab,
10411 struct ppc_stub_hash_entry *stub_entry,
10412 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
10413 {
10414 bfd *obfd = htab->params->stub_bfd;
10415 bfd_boolean plt_load_toc = htab->opd_abi;
10416 bfd_boolean plt_static_chain = htab->params->plt_static_chain;
10417 bfd_boolean plt_thread_safe = (htab->params->plt_thread_safe
10418 && htab->elf.dynamic_sections_created
10419 && stub_entry->h != NULL
10420 && stub_entry->h->elf.dynindx != -1);
10421 bfd_boolean use_fake_dep = plt_thread_safe;
10422 bfd_vma cmp_branch_off = 0;
10423
10424 if (!ALWAYS_USE_FAKE_DEP
10425 && plt_load_toc
10426 && plt_thread_safe
10427 && !((stub_entry->h == htab->tls_get_addr_fd
10428 || stub_entry->h == htab->tls_get_addr)
10429 && htab->params->tls_get_addr_opt))
10430 {
10431 bfd_vma pltoff = stub_entry->plt_ent->plt.offset & ~1;
10432 bfd_vma pltindex = ((pltoff - PLT_INITIAL_ENTRY_SIZE (htab))
10433 / PLT_ENTRY_SIZE (htab));
10434 bfd_vma glinkoff = GLINK_CALL_STUB_SIZE + pltindex * 8;
10435 bfd_vma to, from;
10436
10437 if (pltindex > 32768)
10438 glinkoff += (pltindex - 32768) * 4;
10439 to = (glinkoff
10440 + htab->glink->output_offset
10441 + htab->glink->output_section->vma);
10442 from = (p - stub_entry->group->stub_sec->contents
10443 + 4 * (ALWAYS_EMIT_R2SAVE
10444 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10445 + 4 * (PPC_HA (offset) != 0)
10446 + 4 * (PPC_HA (offset + 8 + 8 * plt_static_chain)
10447 != PPC_HA (offset))
10448 + 4 * (plt_static_chain != 0)
10449 + 20
10450 + stub_entry->group->stub_sec->output_offset
10451 + stub_entry->group->stub_sec->output_section->vma);
10452 cmp_branch_off = to - from;
10453 use_fake_dep = cmp_branch_off + (1 << 25) >= (1 << 26);
10454 }
10455
10456 if (PPC_HA (offset) != 0)
10457 {
10458 if (r != NULL)
10459 {
10460 if (ALWAYS_EMIT_R2SAVE
10461 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10462 r[0].r_offset += 4;
10463 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
10464 r[1].r_offset = r[0].r_offset + 4;
10465 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10466 r[1].r_addend = r[0].r_addend;
10467 if (plt_load_toc)
10468 {
10469 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10470 {
10471 r[2].r_offset = r[1].r_offset + 4;
10472 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO);
10473 r[2].r_addend = r[0].r_addend;
10474 }
10475 else
10476 {
10477 r[2].r_offset = r[1].r_offset + 8 + 8 * use_fake_dep;
10478 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10479 r[2].r_addend = r[0].r_addend + 8;
10480 if (plt_static_chain)
10481 {
10482 r[3].r_offset = r[2].r_offset + 4;
10483 r[3].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10484 r[3].r_addend = r[0].r_addend + 16;
10485 }
10486 }
10487 }
10488 }
10489 if (ALWAYS_EMIT_R2SAVE
10490 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10491 bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p), p += 4;
10492 if (plt_load_toc)
10493 {
10494 bfd_put_32 (obfd, ADDIS_R11_R2 | PPC_HA (offset), p), p += 4;
10495 bfd_put_32 (obfd, LD_R12_0R11 | PPC_LO (offset), p), p += 4;
10496 }
10497 else
10498 {
10499 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
10500 bfd_put_32 (obfd, LD_R12_0R12 | PPC_LO (offset), p), p += 4;
10501 }
10502 if (plt_load_toc
10503 && PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10504 {
10505 bfd_put_32 (obfd, ADDI_R11_R11 | PPC_LO (offset), p), p += 4;
10506 offset = 0;
10507 }
10508 bfd_put_32 (obfd, MTCTR_R12, p), p += 4;
10509 if (plt_load_toc)
10510 {
10511 if (use_fake_dep)
10512 {
10513 bfd_put_32 (obfd, XOR_R2_R12_R12, p), p += 4;
10514 bfd_put_32 (obfd, ADD_R11_R11_R2, p), p += 4;
10515 }
10516 bfd_put_32 (obfd, LD_R2_0R11 | PPC_LO (offset + 8), p), p += 4;
10517 if (plt_static_chain)
10518 bfd_put_32 (obfd, LD_R11_0R11 | PPC_LO (offset + 16), p), p += 4;
10519 }
10520 }
10521 else
10522 {
10523 if (r != NULL)
10524 {
10525 if (ALWAYS_EMIT_R2SAVE
10526 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10527 r[0].r_offset += 4;
10528 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10529 if (plt_load_toc)
10530 {
10531 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10532 {
10533 r[1].r_offset = r[0].r_offset + 4;
10534 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16);
10535 r[1].r_addend = r[0].r_addend;
10536 }
10537 else
10538 {
10539 r[1].r_offset = r[0].r_offset + 8 + 8 * use_fake_dep;
10540 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10541 r[1].r_addend = r[0].r_addend + 8 + 8 * plt_static_chain;
10542 if (plt_static_chain)
10543 {
10544 r[2].r_offset = r[1].r_offset + 4;
10545 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10546 r[2].r_addend = r[0].r_addend + 8;
10547 }
10548 }
10549 }
10550 }
10551 if (ALWAYS_EMIT_R2SAVE
10552 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10553 bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p), p += 4;
10554 bfd_put_32 (obfd, LD_R12_0R2 | PPC_LO (offset), p), p += 4;
10555 if (plt_load_toc
10556 && PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10557 {
10558 bfd_put_32 (obfd, ADDI_R2_R2 | PPC_LO (offset), p), p += 4;
10559 offset = 0;
10560 }
10561 bfd_put_32 (obfd, MTCTR_R12, p), p += 4;
10562 if (plt_load_toc)
10563 {
10564 if (use_fake_dep)
10565 {
10566 bfd_put_32 (obfd, XOR_R11_R12_R12, p), p += 4;
10567 bfd_put_32 (obfd, ADD_R2_R2_R11, p), p += 4;
10568 }
10569 if (plt_static_chain)
10570 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset + 16), p), p += 4;
10571 bfd_put_32 (obfd, LD_R2_0R2 | PPC_LO (offset + 8), p), p += 4;
10572 }
10573 }
10574 if (plt_load_toc && plt_thread_safe && !use_fake_dep)
10575 {
10576 bfd_put_32 (obfd, CMPLDI_R2_0, p), p += 4;
10577 bfd_put_32 (obfd, BNECTR_P4, p), p += 4;
10578 bfd_put_32 (obfd, B_DOT | (cmp_branch_off & 0x3fffffc), p), p += 4;
10579 }
10580 else
10581 bfd_put_32 (obfd, BCTR, p), p += 4;
10582 return p;
10583 }
10584
10585 /* Build a special .plt call stub for __tls_get_addr. */
10586
10587 #define LD_R11_0R3 0xe9630000
10588 #define LD_R12_0R3 0xe9830000
10589 #define MR_R0_R3 0x7c601b78
10590 #define CMPDI_R11_0 0x2c2b0000
10591 #define ADD_R3_R12_R13 0x7c6c6a14
10592 #define BEQLR 0x4d820020
10593 #define MR_R3_R0 0x7c030378
10594 #define STD_R11_0R1 0xf9610000
10595 #define BCTRL 0x4e800421
10596 #define LD_R11_0R1 0xe9610000
10597 #define MTLR_R11 0x7d6803a6
10598
10599 static inline bfd_byte *
10600 build_tls_get_addr_stub (struct ppc_link_hash_table *htab,
10601 struct ppc_stub_hash_entry *stub_entry,
10602 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
10603 {
10604 bfd *obfd = htab->params->stub_bfd;
10605
10606 bfd_put_32 (obfd, LD_R11_0R3 + 0, p), p += 4;
10607 bfd_put_32 (obfd, LD_R12_0R3 + 8, p), p += 4;
10608 bfd_put_32 (obfd, MR_R0_R3, p), p += 4;
10609 bfd_put_32 (obfd, CMPDI_R11_0, p), p += 4;
10610 bfd_put_32 (obfd, ADD_R3_R12_R13, p), p += 4;
10611 bfd_put_32 (obfd, BEQLR, p), p += 4;
10612 bfd_put_32 (obfd, MR_R3_R0, p), p += 4;
10613 bfd_put_32 (obfd, MFLR_R11, p), p += 4;
10614 bfd_put_32 (obfd, STD_R11_0R1 + STK_LINKER (htab), p), p += 4;
10615
10616 if (r != NULL)
10617 r[0].r_offset += 9 * 4;
10618 p = build_plt_stub (htab, stub_entry, p, offset, r);
10619 bfd_put_32 (obfd, BCTRL, p - 4);
10620
10621 bfd_put_32 (obfd, LD_R2_0R1 + STK_TOC (htab), p), p += 4;
10622 bfd_put_32 (obfd, LD_R11_0R1 + STK_LINKER (htab), p), p += 4;
10623 bfd_put_32 (obfd, MTLR_R11, p), p += 4;
10624 bfd_put_32 (obfd, BLR, p), p += 4;
10625
10626 return p;
10627 }
10628
10629 static Elf_Internal_Rela *
10630 get_relocs (asection *sec, int count)
10631 {
10632 Elf_Internal_Rela *relocs;
10633 struct bfd_elf_section_data *elfsec_data;
10634
10635 elfsec_data = elf_section_data (sec);
10636 relocs = elfsec_data->relocs;
10637 if (relocs == NULL)
10638 {
10639 bfd_size_type relsize;
10640 relsize = sec->reloc_count * sizeof (*relocs);
10641 relocs = bfd_alloc (sec->owner, relsize);
10642 if (relocs == NULL)
10643 return NULL;
10644 elfsec_data->relocs = relocs;
10645 elfsec_data->rela.hdr = bfd_zalloc (sec->owner,
10646 sizeof (Elf_Internal_Shdr));
10647 if (elfsec_data->rela.hdr == NULL)
10648 return NULL;
10649 elfsec_data->rela.hdr->sh_size = (sec->reloc_count
10650 * sizeof (Elf64_External_Rela));
10651 elfsec_data->rela.hdr->sh_entsize = sizeof (Elf64_External_Rela);
10652 sec->reloc_count = 0;
10653 }
10654 relocs += sec->reloc_count;
10655 sec->reloc_count += count;
10656 return relocs;
10657 }
10658
10659 static bfd_vma
10660 get_r2off (struct bfd_link_info *info,
10661 struct ppc_stub_hash_entry *stub_entry)
10662 {
10663 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10664 bfd_vma r2off = htab->sec_info[stub_entry->target_section->id].toc_off;
10665
10666 if (r2off == 0)
10667 {
10668 /* Support linking -R objects. Get the toc pointer from the
10669 opd entry. */
10670 char buf[8];
10671 if (!htab->opd_abi)
10672 return r2off;
10673 asection *opd = stub_entry->h->elf.root.u.def.section;
10674 bfd_vma opd_off = stub_entry->h->elf.root.u.def.value;
10675
10676 if (strcmp (opd->name, ".opd") != 0
10677 || opd->reloc_count != 0)
10678 {
10679 info->callbacks->einfo (_("%P: cannot find opd entry toc for `%T'\n"),
10680 stub_entry->h->elf.root.root.string);
10681 bfd_set_error (bfd_error_bad_value);
10682 return (bfd_vma) -1;
10683 }
10684 if (!bfd_get_section_contents (opd->owner, opd, buf, opd_off + 8, 8))
10685 return (bfd_vma) -1;
10686 r2off = bfd_get_64 (opd->owner, buf);
10687 r2off -= elf_gp (info->output_bfd);
10688 }
10689 r2off -= htab->sec_info[stub_entry->group->link_sec->id].toc_off;
10690 return r2off;
10691 }
10692
10693 static bfd_boolean
10694 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
10695 {
10696 struct ppc_stub_hash_entry *stub_entry;
10697 struct ppc_branch_hash_entry *br_entry;
10698 struct bfd_link_info *info;
10699 struct ppc_link_hash_table *htab;
10700 bfd_byte *loc;
10701 bfd_byte *p;
10702 bfd_vma dest, off;
10703 int size;
10704 Elf_Internal_Rela *r;
10705 asection *plt;
10706
10707 /* Massage our args to the form they really have. */
10708 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
10709 info = in_arg;
10710
10711 htab = ppc_hash_table (info);
10712 if (htab == NULL)
10713 return FALSE;
10714
10715 /* Make a note of the offset within the stubs for this entry. */
10716 stub_entry->stub_offset = stub_entry->group->stub_sec->size;
10717 loc = stub_entry->group->stub_sec->contents + stub_entry->stub_offset;
10718
10719 htab->stub_count[stub_entry->stub_type - 1] += 1;
10720 switch (stub_entry->stub_type)
10721 {
10722 case ppc_stub_long_branch:
10723 case ppc_stub_long_branch_r2off:
10724 /* Branches are relative. This is where we are going to. */
10725 dest = (stub_entry->target_value
10726 + stub_entry->target_section->output_offset
10727 + stub_entry->target_section->output_section->vma);
10728 dest += PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
10729 off = dest;
10730
10731 /* And this is where we are coming from. */
10732 off -= (stub_entry->stub_offset
10733 + stub_entry->group->stub_sec->output_offset
10734 + stub_entry->group->stub_sec->output_section->vma);
10735
10736 size = 4;
10737 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
10738 {
10739 bfd_vma r2off = get_r2off (info, stub_entry);
10740
10741 if (r2off == (bfd_vma) -1)
10742 {
10743 htab->stub_error = TRUE;
10744 return FALSE;
10745 }
10746 bfd_put_32 (htab->params->stub_bfd, STD_R2_0R1 + STK_TOC (htab), loc);
10747 loc += 4;
10748 size = 8;
10749 if (PPC_HA (r2off) != 0)
10750 {
10751 bfd_put_32 (htab->params->stub_bfd,
10752 ADDIS_R2_R2 | PPC_HA (r2off), loc);
10753 loc += 4;
10754 size += 4;
10755 }
10756 if (PPC_LO (r2off) != 0)
10757 {
10758 bfd_put_32 (htab->params->stub_bfd,
10759 ADDI_R2_R2 | PPC_LO (r2off), loc);
10760 loc += 4;
10761 size += 4;
10762 }
10763 off -= size - 4;
10764 }
10765 bfd_put_32 (htab->params->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
10766
10767 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
10768 {
10769 info->callbacks->einfo
10770 (_("%P: long branch stub `%s' offset overflow\n"),
10771 stub_entry->root.string);
10772 htab->stub_error = TRUE;
10773 return FALSE;
10774 }
10775
10776 if (info->emitrelocations)
10777 {
10778 r = get_relocs (stub_entry->group->stub_sec, 1);
10779 if (r == NULL)
10780 return FALSE;
10781 r->r_offset = loc - stub_entry->group->stub_sec->contents;
10782 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
10783 r->r_addend = dest;
10784 if (stub_entry->h != NULL)
10785 {
10786 struct elf_link_hash_entry **hashes;
10787 unsigned long symndx;
10788 struct ppc_link_hash_entry *h;
10789
10790 hashes = elf_sym_hashes (htab->params->stub_bfd);
10791 if (hashes == NULL)
10792 {
10793 bfd_size_type hsize;
10794
10795 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
10796 hashes = bfd_zalloc (htab->params->stub_bfd, hsize);
10797 if (hashes == NULL)
10798 return FALSE;
10799 elf_sym_hashes (htab->params->stub_bfd) = hashes;
10800 htab->stub_globals = 1;
10801 }
10802 symndx = htab->stub_globals++;
10803 h = stub_entry->h;
10804 hashes[symndx] = &h->elf;
10805 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
10806 if (h->oh != NULL && h->oh->is_func)
10807 h = ppc_follow_link (h->oh);
10808 if (h->elf.root.u.def.section != stub_entry->target_section)
10809 /* H is an opd symbol. The addend must be zero. */
10810 r->r_addend = 0;
10811 else
10812 {
10813 off = (h->elf.root.u.def.value
10814 + h->elf.root.u.def.section->output_offset
10815 + h->elf.root.u.def.section->output_section->vma);
10816 r->r_addend -= off;
10817 }
10818 }
10819 }
10820 break;
10821
10822 case ppc_stub_plt_branch:
10823 case ppc_stub_plt_branch_r2off:
10824 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
10825 stub_entry->root.string + 9,
10826 FALSE, FALSE);
10827 if (br_entry == NULL)
10828 {
10829 info->callbacks->einfo (_("%P: can't find branch stub `%s'\n"),
10830 stub_entry->root.string);
10831 htab->stub_error = TRUE;
10832 return FALSE;
10833 }
10834
10835 dest = (stub_entry->target_value
10836 + stub_entry->target_section->output_offset
10837 + stub_entry->target_section->output_section->vma);
10838 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
10839 dest += PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
10840
10841 bfd_put_64 (htab->brlt->owner, dest,
10842 htab->brlt->contents + br_entry->offset);
10843
10844 if (br_entry->iter == htab->stub_iteration)
10845 {
10846 br_entry->iter = 0;
10847
10848 if (htab->relbrlt != NULL)
10849 {
10850 /* Create a reloc for the branch lookup table entry. */
10851 Elf_Internal_Rela rela;
10852 bfd_byte *rl;
10853
10854 rela.r_offset = (br_entry->offset
10855 + htab->brlt->output_offset
10856 + htab->brlt->output_section->vma);
10857 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
10858 rela.r_addend = dest;
10859
10860 rl = htab->relbrlt->contents;
10861 rl += (htab->relbrlt->reloc_count++
10862 * sizeof (Elf64_External_Rela));
10863 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
10864 }
10865 else if (info->emitrelocations)
10866 {
10867 r = get_relocs (htab->brlt, 1);
10868 if (r == NULL)
10869 return FALSE;
10870 /* brlt, being SEC_LINKER_CREATED does not go through the
10871 normal reloc processing. Symbols and offsets are not
10872 translated from input file to output file form, so
10873 set up the offset per the output file. */
10874 r->r_offset = (br_entry->offset
10875 + htab->brlt->output_offset
10876 + htab->brlt->output_section->vma);
10877 r->r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
10878 r->r_addend = dest;
10879 }
10880 }
10881
10882 dest = (br_entry->offset
10883 + htab->brlt->output_offset
10884 + htab->brlt->output_section->vma);
10885
10886 off = (dest
10887 - elf_gp (htab->brlt->output_section->owner)
10888 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
10889
10890 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
10891 {
10892 info->callbacks->einfo
10893 (_("%P: linkage table error against `%T'\n"),
10894 stub_entry->root.string);
10895 bfd_set_error (bfd_error_bad_value);
10896 htab->stub_error = TRUE;
10897 return FALSE;
10898 }
10899
10900 if (info->emitrelocations)
10901 {
10902 r = get_relocs (stub_entry->group->stub_sec, 1 + (PPC_HA (off) != 0));
10903 if (r == NULL)
10904 return FALSE;
10905 r[0].r_offset = loc - stub_entry->group->stub_sec->contents;
10906 if (bfd_big_endian (info->output_bfd))
10907 r[0].r_offset += 2;
10908 if (stub_entry->stub_type == ppc_stub_plt_branch_r2off)
10909 r[0].r_offset += 4;
10910 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10911 r[0].r_addend = dest;
10912 if (PPC_HA (off) != 0)
10913 {
10914 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
10915 r[1].r_offset = r[0].r_offset + 4;
10916 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10917 r[1].r_addend = r[0].r_addend;
10918 }
10919 }
10920
10921 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
10922 {
10923 if (PPC_HA (off) != 0)
10924 {
10925 size = 16;
10926 bfd_put_32 (htab->params->stub_bfd,
10927 ADDIS_R12_R2 | PPC_HA (off), loc);
10928 loc += 4;
10929 bfd_put_32 (htab->params->stub_bfd,
10930 LD_R12_0R12 | PPC_LO (off), loc);
10931 }
10932 else
10933 {
10934 size = 12;
10935 bfd_put_32 (htab->params->stub_bfd,
10936 LD_R12_0R2 | PPC_LO (off), loc);
10937 }
10938 }
10939 else
10940 {
10941 bfd_vma r2off = get_r2off (info, stub_entry);
10942
10943 if (r2off == (bfd_vma) -1)
10944 {
10945 htab->stub_error = TRUE;
10946 return FALSE;
10947 }
10948
10949 bfd_put_32 (htab->params->stub_bfd, STD_R2_0R1 + STK_TOC (htab), loc);
10950 loc += 4;
10951 size = 16;
10952 if (PPC_HA (off) != 0)
10953 {
10954 size += 4;
10955 bfd_put_32 (htab->params->stub_bfd,
10956 ADDIS_R12_R2 | PPC_HA (off), loc);
10957 loc += 4;
10958 bfd_put_32 (htab->params->stub_bfd,
10959 LD_R12_0R12 | PPC_LO (off), loc);
10960 }
10961 else
10962 bfd_put_32 (htab->params->stub_bfd, LD_R12_0R2 | PPC_LO (off), loc);
10963
10964 if (PPC_HA (r2off) != 0)
10965 {
10966 size += 4;
10967 loc += 4;
10968 bfd_put_32 (htab->params->stub_bfd,
10969 ADDIS_R2_R2 | PPC_HA (r2off), loc);
10970 }
10971 if (PPC_LO (r2off) != 0)
10972 {
10973 size += 4;
10974 loc += 4;
10975 bfd_put_32 (htab->params->stub_bfd,
10976 ADDI_R2_R2 | PPC_LO (r2off), loc);
10977 }
10978 }
10979 loc += 4;
10980 bfd_put_32 (htab->params->stub_bfd, MTCTR_R12, loc);
10981 loc += 4;
10982 bfd_put_32 (htab->params->stub_bfd, BCTR, loc);
10983 break;
10984
10985 case ppc_stub_plt_call:
10986 case ppc_stub_plt_call_r2save:
10987 if (stub_entry->h != NULL
10988 && stub_entry->h->is_func_descriptor
10989 && stub_entry->h->oh != NULL)
10990 {
10991 struct ppc_link_hash_entry *fh = ppc_follow_link (stub_entry->h->oh);
10992
10993 /* If the old-ABI "dot-symbol" is undefined make it weak so
10994 we don't get a link error from RELOC_FOR_GLOBAL_SYMBOL. */
10995 if (fh->elf.root.type == bfd_link_hash_undefined)
10996 fh->elf.root.type = bfd_link_hash_undefweak;
10997 /* Stop undo_symbol_twiddle changing it back to undefined. */
10998 fh->was_undefined = 0;
10999 }
11000
11001 /* Now build the stub. */
11002 dest = stub_entry->plt_ent->plt.offset & ~1;
11003 if (dest >= (bfd_vma) -2)
11004 abort ();
11005
11006 plt = htab->elf.splt;
11007 if (!htab->elf.dynamic_sections_created
11008 || stub_entry->h == NULL
11009 || stub_entry->h->elf.dynindx == -1)
11010 plt = htab->elf.iplt;
11011
11012 dest += plt->output_offset + plt->output_section->vma;
11013
11014 if (stub_entry->h == NULL
11015 && (stub_entry->plt_ent->plt.offset & 1) == 0)
11016 {
11017 Elf_Internal_Rela rela;
11018 bfd_byte *rl;
11019
11020 rela.r_offset = dest;
11021 if (htab->opd_abi)
11022 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
11023 else
11024 rela.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
11025 rela.r_addend = (stub_entry->target_value
11026 + stub_entry->target_section->output_offset
11027 + stub_entry->target_section->output_section->vma);
11028
11029 rl = (htab->elf.irelplt->contents
11030 + (htab->elf.irelplt->reloc_count++
11031 * sizeof (Elf64_External_Rela)));
11032 bfd_elf64_swap_reloca_out (info->output_bfd, &rela, rl);
11033 stub_entry->plt_ent->plt.offset |= 1;
11034 }
11035
11036 off = (dest
11037 - elf_gp (plt->output_section->owner)
11038 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11039
11040 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
11041 {
11042 info->callbacks->einfo
11043 (_("%P: linkage table error against `%T'\n"),
11044 stub_entry->h != NULL
11045 ? stub_entry->h->elf.root.root.string
11046 : "<local sym>");
11047 bfd_set_error (bfd_error_bad_value);
11048 htab->stub_error = TRUE;
11049 return FALSE;
11050 }
11051
11052 if (htab->params->plt_stub_align != 0)
11053 {
11054 unsigned pad = plt_stub_pad (htab, stub_entry, off);
11055
11056 stub_entry->group->stub_sec->size += pad;
11057 stub_entry->stub_offset = stub_entry->group->stub_sec->size;
11058 loc += pad;
11059 }
11060
11061 r = NULL;
11062 if (info->emitrelocations)
11063 {
11064 r = get_relocs (stub_entry->group->stub_sec,
11065 ((PPC_HA (off) != 0)
11066 + (htab->opd_abi
11067 ? 2 + (htab->params->plt_static_chain
11068 && PPC_HA (off + 16) == PPC_HA (off))
11069 : 1)));
11070 if (r == NULL)
11071 return FALSE;
11072 r[0].r_offset = loc - stub_entry->group->stub_sec->contents;
11073 if (bfd_big_endian (info->output_bfd))
11074 r[0].r_offset += 2;
11075 r[0].r_addend = dest;
11076 }
11077 if (stub_entry->h != NULL
11078 && (stub_entry->h == htab->tls_get_addr_fd
11079 || stub_entry->h == htab->tls_get_addr)
11080 && htab->params->tls_get_addr_opt)
11081 p = build_tls_get_addr_stub (htab, stub_entry, loc, off, r);
11082 else
11083 p = build_plt_stub (htab, stub_entry, loc, off, r);
11084 size = p - loc;
11085 break;
11086
11087 case ppc_stub_save_res:
11088 return TRUE;
11089
11090 default:
11091 BFD_FAIL ();
11092 return FALSE;
11093 }
11094
11095 stub_entry->group->stub_sec->size += size;
11096
11097 if (htab->params->emit_stub_syms)
11098 {
11099 struct elf_link_hash_entry *h;
11100 size_t len1, len2;
11101 char *name;
11102 const char *const stub_str[] = { "long_branch",
11103 "long_branch_r2off",
11104 "plt_branch",
11105 "plt_branch_r2off",
11106 "plt_call",
11107 "plt_call" };
11108
11109 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
11110 len2 = strlen (stub_entry->root.string);
11111 name = bfd_malloc (len1 + len2 + 2);
11112 if (name == NULL)
11113 return FALSE;
11114 memcpy (name, stub_entry->root.string, 9);
11115 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
11116 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
11117 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
11118 if (h == NULL)
11119 return FALSE;
11120 if (h->root.type == bfd_link_hash_new)
11121 {
11122 h->root.type = bfd_link_hash_defined;
11123 h->root.u.def.section = stub_entry->group->stub_sec;
11124 h->root.u.def.value = stub_entry->stub_offset;
11125 h->ref_regular = 1;
11126 h->def_regular = 1;
11127 h->ref_regular_nonweak = 1;
11128 h->forced_local = 1;
11129 h->non_elf = 0;
11130 h->root.linker_def = 1;
11131 }
11132 }
11133
11134 return TRUE;
11135 }
11136
11137 /* As above, but don't actually build the stub. Just bump offset so
11138 we know stub section sizes, and select plt_branch stubs where
11139 long_branch stubs won't do. */
11140
11141 static bfd_boolean
11142 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
11143 {
11144 struct ppc_stub_hash_entry *stub_entry;
11145 struct bfd_link_info *info;
11146 struct ppc_link_hash_table *htab;
11147 bfd_vma off;
11148 int size;
11149
11150 /* Massage our args to the form they really have. */
11151 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
11152 info = in_arg;
11153
11154 htab = ppc_hash_table (info);
11155 if (htab == NULL)
11156 return FALSE;
11157
11158 if (stub_entry->h != NULL
11159 && stub_entry->h->save_res
11160 && stub_entry->h->elf.root.type == bfd_link_hash_defined
11161 && stub_entry->h->elf.root.u.def.section == htab->sfpr)
11162 {
11163 /* Don't make stubs to out-of-line register save/restore
11164 functions. Instead, emit copies of the functions. */
11165 stub_entry->group->needs_save_res = 1;
11166 stub_entry->stub_type = ppc_stub_save_res;
11167 return TRUE;
11168 }
11169
11170 if (stub_entry->stub_type == ppc_stub_plt_call
11171 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
11172 {
11173 asection *plt;
11174 off = stub_entry->plt_ent->plt.offset & ~(bfd_vma) 1;
11175 if (off >= (bfd_vma) -2)
11176 abort ();
11177 plt = htab->elf.splt;
11178 if (!htab->elf.dynamic_sections_created
11179 || stub_entry->h == NULL
11180 || stub_entry->h->elf.dynindx == -1)
11181 plt = htab->elf.iplt;
11182 off += (plt->output_offset
11183 + plt->output_section->vma
11184 - elf_gp (plt->output_section->owner)
11185 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11186
11187 size = plt_stub_size (htab, stub_entry, off);
11188 if (htab->params->plt_stub_align)
11189 size += plt_stub_pad (htab, stub_entry, off);
11190 if (info->emitrelocations)
11191 {
11192 stub_entry->group->stub_sec->reloc_count
11193 += ((PPC_HA (off) != 0)
11194 + (htab->opd_abi
11195 ? 2 + (htab->params->plt_static_chain
11196 && PPC_HA (off + 16) == PPC_HA (off))
11197 : 1));
11198 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11199 }
11200 }
11201 else
11202 {
11203 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
11204 variants. */
11205 bfd_vma r2off = 0;
11206 bfd_vma local_off = 0;
11207
11208 off = (stub_entry->target_value
11209 + stub_entry->target_section->output_offset
11210 + stub_entry->target_section->output_section->vma);
11211 off -= (stub_entry->group->stub_sec->size
11212 + stub_entry->group->stub_sec->output_offset
11213 + stub_entry->group->stub_sec->output_section->vma);
11214
11215 /* Reset the stub type from the plt variant in case we now
11216 can reach with a shorter stub. */
11217 if (stub_entry->stub_type >= ppc_stub_plt_branch)
11218 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
11219
11220 size = 4;
11221 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
11222 {
11223 r2off = get_r2off (info, stub_entry);
11224 if (r2off == (bfd_vma) -1)
11225 {
11226 htab->stub_error = TRUE;
11227 return FALSE;
11228 }
11229 size = 8;
11230 if (PPC_HA (r2off) != 0)
11231 size += 4;
11232 if (PPC_LO (r2off) != 0)
11233 size += 4;
11234 off -= size - 4;
11235 }
11236
11237 local_off = PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
11238
11239 /* If the branch offset if too big, use a ppc_stub_plt_branch.
11240 Do the same for -R objects without function descriptors. */
11241 if (off + (1 << 25) >= (bfd_vma) (1 << 26) - local_off
11242 || (stub_entry->stub_type == ppc_stub_long_branch_r2off
11243 && r2off == 0
11244 && htab->sec_info[stub_entry->target_section->id].toc_off == 0))
11245 {
11246 struct ppc_branch_hash_entry *br_entry;
11247
11248 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
11249 stub_entry->root.string + 9,
11250 TRUE, FALSE);
11251 if (br_entry == NULL)
11252 {
11253 info->callbacks->einfo (_("%P: can't build branch stub `%s'\n"),
11254 stub_entry->root.string);
11255 htab->stub_error = TRUE;
11256 return FALSE;
11257 }
11258
11259 if (br_entry->iter != htab->stub_iteration)
11260 {
11261 br_entry->iter = htab->stub_iteration;
11262 br_entry->offset = htab->brlt->size;
11263 htab->brlt->size += 8;
11264
11265 if (htab->relbrlt != NULL)
11266 htab->relbrlt->size += sizeof (Elf64_External_Rela);
11267 else if (info->emitrelocations)
11268 {
11269 htab->brlt->reloc_count += 1;
11270 htab->brlt->flags |= SEC_RELOC;
11271 }
11272 }
11273
11274 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
11275 off = (br_entry->offset
11276 + htab->brlt->output_offset
11277 + htab->brlt->output_section->vma
11278 - elf_gp (htab->brlt->output_section->owner)
11279 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11280
11281 if (info->emitrelocations)
11282 {
11283 stub_entry->group->stub_sec->reloc_count
11284 += 1 + (PPC_HA (off) != 0);
11285 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11286 }
11287
11288 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
11289 {
11290 size = 12;
11291 if (PPC_HA (off) != 0)
11292 size = 16;
11293 }
11294 else
11295 {
11296 size = 16;
11297 if (PPC_HA (off) != 0)
11298 size += 4;
11299
11300 if (PPC_HA (r2off) != 0)
11301 size += 4;
11302 if (PPC_LO (r2off) != 0)
11303 size += 4;
11304 }
11305 }
11306 else if (info->emitrelocations)
11307 {
11308 stub_entry->group->stub_sec->reloc_count += 1;
11309 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11310 }
11311 }
11312
11313 stub_entry->group->stub_sec->size += size;
11314 return TRUE;
11315 }
11316
11317 /* Set up various things so that we can make a list of input sections
11318 for each output section included in the link. Returns -1 on error,
11319 0 when no stubs will be needed, and 1 on success. */
11320
11321 int
11322 ppc64_elf_setup_section_lists (struct bfd_link_info *info)
11323 {
11324 unsigned int id;
11325 bfd_size_type amt;
11326 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11327
11328 if (htab == NULL)
11329 return -1;
11330
11331 htab->sec_info_arr_size = bfd_get_next_section_id ();
11332 amt = sizeof (*htab->sec_info) * (htab->sec_info_arr_size);
11333 htab->sec_info = bfd_zmalloc (amt);
11334 if (htab->sec_info == NULL)
11335 return -1;
11336
11337 /* Set toc_off for com, und, abs and ind sections. */
11338 for (id = 0; id < 3; id++)
11339 htab->sec_info[id].toc_off = TOC_BASE_OFF;
11340
11341 return 1;
11342 }
11343
11344 /* Set up for first pass at multitoc partitioning. */
11345
11346 void
11347 ppc64_elf_start_multitoc_partition (struct bfd_link_info *info)
11348 {
11349 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11350
11351 htab->toc_curr = ppc64_elf_set_toc (info, info->output_bfd);
11352 htab->toc_bfd = NULL;
11353 htab->toc_first_sec = NULL;
11354 }
11355
11356 /* The linker repeatedly calls this function for each TOC input section
11357 and linker generated GOT section. Group input bfds such that the toc
11358 within a group is less than 64k in size. */
11359
11360 bfd_boolean
11361 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
11362 {
11363 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11364 bfd_vma addr, off, limit;
11365
11366 if (htab == NULL)
11367 return FALSE;
11368
11369 if (!htab->second_toc_pass)
11370 {
11371 /* Keep track of the first .toc or .got section for this input bfd. */
11372 bfd_boolean new_bfd = htab->toc_bfd != isec->owner;
11373
11374 if (new_bfd)
11375 {
11376 htab->toc_bfd = isec->owner;
11377 htab->toc_first_sec = isec;
11378 }
11379
11380 addr = isec->output_offset + isec->output_section->vma;
11381 off = addr - htab->toc_curr;
11382 limit = 0x80008000;
11383 if (ppc64_elf_tdata (isec->owner)->has_small_toc_reloc)
11384 limit = 0x10000;
11385 if (off + isec->size > limit)
11386 {
11387 addr = (htab->toc_first_sec->output_offset
11388 + htab->toc_first_sec->output_section->vma);
11389 htab->toc_curr = addr;
11390 htab->toc_curr &= -TOC_BASE_ALIGN;
11391 }
11392
11393 /* toc_curr is the base address of this toc group. Set elf_gp
11394 for the input section to be the offset relative to the
11395 output toc base plus 0x8000. Making the input elf_gp an
11396 offset allows us to move the toc as a whole without
11397 recalculating input elf_gp. */
11398 off = htab->toc_curr - elf_gp (isec->output_section->owner);
11399 off += TOC_BASE_OFF;
11400
11401 /* Die if someone uses a linker script that doesn't keep input
11402 file .toc and .got together. */
11403 if (new_bfd
11404 && elf_gp (isec->owner) != 0
11405 && elf_gp (isec->owner) != off)
11406 return FALSE;
11407
11408 elf_gp (isec->owner) = off;
11409 return TRUE;
11410 }
11411
11412 /* During the second pass toc_first_sec points to the start of
11413 a toc group, and toc_curr is used to track the old elf_gp.
11414 We use toc_bfd to ensure we only look at each bfd once. */
11415 if (htab->toc_bfd == isec->owner)
11416 return TRUE;
11417 htab->toc_bfd = isec->owner;
11418
11419 if (htab->toc_first_sec == NULL
11420 || htab->toc_curr != elf_gp (isec->owner))
11421 {
11422 htab->toc_curr = elf_gp (isec->owner);
11423 htab->toc_first_sec = isec;
11424 }
11425 addr = (htab->toc_first_sec->output_offset
11426 + htab->toc_first_sec->output_section->vma);
11427 off = addr - elf_gp (isec->output_section->owner) + TOC_BASE_OFF;
11428 elf_gp (isec->owner) = off;
11429
11430 return TRUE;
11431 }
11432
11433 /* Called via elf_link_hash_traverse to merge GOT entries for global
11434 symbol H. */
11435
11436 static bfd_boolean
11437 merge_global_got (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
11438 {
11439 if (h->root.type == bfd_link_hash_indirect)
11440 return TRUE;
11441
11442 merge_got_entries (&h->got.glist);
11443
11444 return TRUE;
11445 }
11446
11447 /* Called via elf_link_hash_traverse to allocate GOT entries for global
11448 symbol H. */
11449
11450 static bfd_boolean
11451 reallocate_got (struct elf_link_hash_entry *h, void *inf)
11452 {
11453 struct got_entry *gent;
11454
11455 if (h->root.type == bfd_link_hash_indirect)
11456 return TRUE;
11457
11458 for (gent = h->got.glist; gent != NULL; gent = gent->next)
11459 if (!gent->is_indirect)
11460 allocate_got (h, (struct bfd_link_info *) inf, gent);
11461 return TRUE;
11462 }
11463
11464 /* Called on the first multitoc pass after the last call to
11465 ppc64_elf_next_toc_section. This function removes duplicate GOT
11466 entries. */
11467
11468 bfd_boolean
11469 ppc64_elf_layout_multitoc (struct bfd_link_info *info)
11470 {
11471 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11472 struct bfd *ibfd, *ibfd2;
11473 bfd_boolean done_something;
11474
11475 htab->multi_toc_needed = htab->toc_curr != elf_gp (info->output_bfd);
11476
11477 if (!htab->do_multi_toc)
11478 return FALSE;
11479
11480 /* Merge global sym got entries within a toc group. */
11481 elf_link_hash_traverse (&htab->elf, merge_global_got, info);
11482
11483 /* And tlsld_got. */
11484 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11485 {
11486 struct got_entry *ent, *ent2;
11487
11488 if (!is_ppc64_elf (ibfd))
11489 continue;
11490
11491 ent = ppc64_tlsld_got (ibfd);
11492 if (!ent->is_indirect
11493 && ent->got.offset != (bfd_vma) -1)
11494 {
11495 for (ibfd2 = ibfd->link.next; ibfd2 != NULL; ibfd2 = ibfd2->link.next)
11496 {
11497 if (!is_ppc64_elf (ibfd2))
11498 continue;
11499
11500 ent2 = ppc64_tlsld_got (ibfd2);
11501 if (!ent2->is_indirect
11502 && ent2->got.offset != (bfd_vma) -1
11503 && elf_gp (ibfd2) == elf_gp (ibfd))
11504 {
11505 ent2->is_indirect = TRUE;
11506 ent2->got.ent = ent;
11507 }
11508 }
11509 }
11510 }
11511
11512 /* Zap sizes of got sections. */
11513 htab->elf.irelplt->rawsize = htab->elf.irelplt->size;
11514 htab->elf.irelplt->size -= htab->got_reli_size;
11515 htab->got_reli_size = 0;
11516
11517 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11518 {
11519 asection *got, *relgot;
11520
11521 if (!is_ppc64_elf (ibfd))
11522 continue;
11523
11524 got = ppc64_elf_tdata (ibfd)->got;
11525 if (got != NULL)
11526 {
11527 got->rawsize = got->size;
11528 got->size = 0;
11529 relgot = ppc64_elf_tdata (ibfd)->relgot;
11530 relgot->rawsize = relgot->size;
11531 relgot->size = 0;
11532 }
11533 }
11534
11535 /* Now reallocate the got, local syms first. We don't need to
11536 allocate section contents again since we never increase size. */
11537 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11538 {
11539 struct got_entry **lgot_ents;
11540 struct got_entry **end_lgot_ents;
11541 struct plt_entry **local_plt;
11542 struct plt_entry **end_local_plt;
11543 unsigned char *lgot_masks;
11544 bfd_size_type locsymcount;
11545 Elf_Internal_Shdr *symtab_hdr;
11546 asection *s;
11547
11548 if (!is_ppc64_elf (ibfd))
11549 continue;
11550
11551 lgot_ents = elf_local_got_ents (ibfd);
11552 if (!lgot_ents)
11553 continue;
11554
11555 symtab_hdr = &elf_symtab_hdr (ibfd);
11556 locsymcount = symtab_hdr->sh_info;
11557 end_lgot_ents = lgot_ents + locsymcount;
11558 local_plt = (struct plt_entry **) end_lgot_ents;
11559 end_local_plt = local_plt + locsymcount;
11560 lgot_masks = (unsigned char *) end_local_plt;
11561 s = ppc64_elf_tdata (ibfd)->got;
11562 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
11563 {
11564 struct got_entry *ent;
11565
11566 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
11567 {
11568 unsigned int ent_size = 8;
11569 unsigned int rel_size = sizeof (Elf64_External_Rela);
11570
11571 ent->got.offset = s->size;
11572 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
11573 {
11574 ent_size *= 2;
11575 rel_size *= 2;
11576 }
11577 s->size += ent_size;
11578 if ((*lgot_masks & PLT_IFUNC) != 0)
11579 {
11580 htab->elf.irelplt->size += rel_size;
11581 htab->got_reli_size += rel_size;
11582 }
11583 else if (bfd_link_pic (info))
11584 {
11585 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
11586 srel->size += rel_size;
11587 }
11588 }
11589 }
11590 }
11591
11592 elf_link_hash_traverse (&htab->elf, reallocate_got, info);
11593
11594 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11595 {
11596 struct got_entry *ent;
11597
11598 if (!is_ppc64_elf (ibfd))
11599 continue;
11600
11601 ent = ppc64_tlsld_got (ibfd);
11602 if (!ent->is_indirect
11603 && ent->got.offset != (bfd_vma) -1)
11604 {
11605 asection *s = ppc64_elf_tdata (ibfd)->got;
11606 ent->got.offset = s->size;
11607 s->size += 16;
11608 if (bfd_link_pic (info))
11609 {
11610 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
11611 srel->size += sizeof (Elf64_External_Rela);
11612 }
11613 }
11614 }
11615
11616 done_something = htab->elf.irelplt->rawsize != htab->elf.irelplt->size;
11617 if (!done_something)
11618 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11619 {
11620 asection *got;
11621
11622 if (!is_ppc64_elf (ibfd))
11623 continue;
11624
11625 got = ppc64_elf_tdata (ibfd)->got;
11626 if (got != NULL)
11627 {
11628 done_something = got->rawsize != got->size;
11629 if (done_something)
11630 break;
11631 }
11632 }
11633
11634 if (done_something)
11635 (*htab->params->layout_sections_again) ();
11636
11637 /* Set up for second pass over toc sections to recalculate elf_gp
11638 on input sections. */
11639 htab->toc_bfd = NULL;
11640 htab->toc_first_sec = NULL;
11641 htab->second_toc_pass = TRUE;
11642 return done_something;
11643 }
11644
11645 /* Called after second pass of multitoc partitioning. */
11646
11647 void
11648 ppc64_elf_finish_multitoc_partition (struct bfd_link_info *info)
11649 {
11650 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11651
11652 /* After the second pass, toc_curr tracks the TOC offset used
11653 for code sections below in ppc64_elf_next_input_section. */
11654 htab->toc_curr = TOC_BASE_OFF;
11655 }
11656
11657 /* No toc references were found in ISEC. If the code in ISEC makes no
11658 calls, then there's no need to use toc adjusting stubs when branching
11659 into ISEC. Actually, indirect calls from ISEC are OK as they will
11660 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
11661 needed, and 2 if a cyclical call-graph was found but no other reason
11662 for a stub was detected. If called from the top level, a return of
11663 2 means the same as a return of 0. */
11664
11665 static int
11666 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
11667 {
11668 int ret;
11669
11670 /* Mark this section as checked. */
11671 isec->call_check_done = 1;
11672
11673 /* We know none of our code bearing sections will need toc stubs. */
11674 if ((isec->flags & SEC_LINKER_CREATED) != 0)
11675 return 0;
11676
11677 if (isec->size == 0)
11678 return 0;
11679
11680 if (isec->output_section == NULL)
11681 return 0;
11682
11683 ret = 0;
11684 if (isec->reloc_count != 0)
11685 {
11686 Elf_Internal_Rela *relstart, *rel;
11687 Elf_Internal_Sym *local_syms;
11688 struct ppc_link_hash_table *htab;
11689
11690 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
11691 info->keep_memory);
11692 if (relstart == NULL)
11693 return -1;
11694
11695 /* Look for branches to outside of this section. */
11696 local_syms = NULL;
11697 htab = ppc_hash_table (info);
11698 if (htab == NULL)
11699 return -1;
11700
11701 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
11702 {
11703 enum elf_ppc64_reloc_type r_type;
11704 unsigned long r_symndx;
11705 struct elf_link_hash_entry *h;
11706 struct ppc_link_hash_entry *eh;
11707 Elf_Internal_Sym *sym;
11708 asection *sym_sec;
11709 struct _opd_sec_data *opd;
11710 bfd_vma sym_value;
11711 bfd_vma dest;
11712
11713 r_type = ELF64_R_TYPE (rel->r_info);
11714 if (r_type != R_PPC64_REL24
11715 && r_type != R_PPC64_REL14
11716 && r_type != R_PPC64_REL14_BRTAKEN
11717 && r_type != R_PPC64_REL14_BRNTAKEN)
11718 continue;
11719
11720 r_symndx = ELF64_R_SYM (rel->r_info);
11721 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
11722 isec->owner))
11723 {
11724 ret = -1;
11725 break;
11726 }
11727
11728 /* Calls to dynamic lib functions go through a plt call stub
11729 that uses r2. */
11730 eh = (struct ppc_link_hash_entry *) h;
11731 if (eh != NULL
11732 && (eh->elf.plt.plist != NULL
11733 || (eh->oh != NULL
11734 && ppc_follow_link (eh->oh)->elf.plt.plist != NULL)))
11735 {
11736 ret = 1;
11737 break;
11738 }
11739
11740 if (sym_sec == NULL)
11741 /* Ignore other undefined symbols. */
11742 continue;
11743
11744 /* Assume branches to other sections not included in the
11745 link need stubs too, to cover -R and absolute syms. */
11746 if (sym_sec->output_section == NULL)
11747 {
11748 ret = 1;
11749 break;
11750 }
11751
11752 if (h == NULL)
11753 sym_value = sym->st_value;
11754 else
11755 {
11756 if (h->root.type != bfd_link_hash_defined
11757 && h->root.type != bfd_link_hash_defweak)
11758 abort ();
11759 sym_value = h->root.u.def.value;
11760 }
11761 sym_value += rel->r_addend;
11762
11763 /* If this branch reloc uses an opd sym, find the code section. */
11764 opd = get_opd_info (sym_sec);
11765 if (opd != NULL)
11766 {
11767 if (h == NULL && opd->adjust != NULL)
11768 {
11769 long adjust;
11770
11771 adjust = opd->adjust[OPD_NDX (sym_value)];
11772 if (adjust == -1)
11773 /* Assume deleted functions won't ever be called. */
11774 continue;
11775 sym_value += adjust;
11776 }
11777
11778 dest = opd_entry_value (sym_sec, sym_value,
11779 &sym_sec, NULL, FALSE);
11780 if (dest == (bfd_vma) -1)
11781 continue;
11782 }
11783 else
11784 dest = (sym_value
11785 + sym_sec->output_offset
11786 + sym_sec->output_section->vma);
11787
11788 /* Ignore branch to self. */
11789 if (sym_sec == isec)
11790 continue;
11791
11792 /* If the called function uses the toc, we need a stub. */
11793 if (sym_sec->has_toc_reloc
11794 || sym_sec->makes_toc_func_call)
11795 {
11796 ret = 1;
11797 break;
11798 }
11799
11800 /* Assume any branch that needs a long branch stub might in fact
11801 need a plt_branch stub. A plt_branch stub uses r2. */
11802 else if (dest - (isec->output_offset
11803 + isec->output_section->vma
11804 + rel->r_offset) + (1 << 25)
11805 >= (2u << 25) - PPC64_LOCAL_ENTRY_OFFSET (h
11806 ? h->other
11807 : sym->st_other))
11808 {
11809 ret = 1;
11810 break;
11811 }
11812
11813 /* If calling back to a section in the process of being
11814 tested, we can't say for sure that no toc adjusting stubs
11815 are needed, so don't return zero. */
11816 else if (sym_sec->call_check_in_progress)
11817 ret = 2;
11818
11819 /* Branches to another section that itself doesn't have any TOC
11820 references are OK. Recursively call ourselves to check. */
11821 else if (!sym_sec->call_check_done)
11822 {
11823 int recur;
11824
11825 /* Mark current section as indeterminate, so that other
11826 sections that call back to current won't be marked as
11827 known. */
11828 isec->call_check_in_progress = 1;
11829 recur = toc_adjusting_stub_needed (info, sym_sec);
11830 isec->call_check_in_progress = 0;
11831
11832 if (recur != 0)
11833 {
11834 ret = recur;
11835 if (recur != 2)
11836 break;
11837 }
11838 }
11839 }
11840
11841 if (local_syms != NULL
11842 && (elf_symtab_hdr (isec->owner).contents
11843 != (unsigned char *) local_syms))
11844 free (local_syms);
11845 if (elf_section_data (isec)->relocs != relstart)
11846 free (relstart);
11847 }
11848
11849 if ((ret & 1) == 0
11850 && isec->map_head.s != NULL
11851 && (strcmp (isec->output_section->name, ".init") == 0
11852 || strcmp (isec->output_section->name, ".fini") == 0))
11853 {
11854 if (isec->map_head.s->has_toc_reloc
11855 || isec->map_head.s->makes_toc_func_call)
11856 ret = 1;
11857 else if (!isec->map_head.s->call_check_done)
11858 {
11859 int recur;
11860 isec->call_check_in_progress = 1;
11861 recur = toc_adjusting_stub_needed (info, isec->map_head.s);
11862 isec->call_check_in_progress = 0;
11863 if (recur != 0)
11864 ret = recur;
11865 }
11866 }
11867
11868 if (ret == 1)
11869 isec->makes_toc_func_call = 1;
11870
11871 return ret;
11872 }
11873
11874 /* The linker repeatedly calls this function for each input section,
11875 in the order that input sections are linked into output sections.
11876 Build lists of input sections to determine groupings between which
11877 we may insert linker stubs. */
11878
11879 bfd_boolean
11880 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
11881 {
11882 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11883
11884 if (htab == NULL)
11885 return FALSE;
11886
11887 if ((isec->output_section->flags & SEC_CODE) != 0
11888 && isec->output_section->id < htab->sec_info_arr_size)
11889 {
11890 /* This happens to make the list in reverse order,
11891 which is what we want. */
11892 htab->sec_info[isec->id].u.list
11893 = htab->sec_info[isec->output_section->id].u.list;
11894 htab->sec_info[isec->output_section->id].u.list = isec;
11895 }
11896
11897 if (htab->multi_toc_needed)
11898 {
11899 /* Analyse sections that aren't already flagged as needing a
11900 valid toc pointer. Exclude .fixup for the linux kernel.
11901 .fixup contains branches, but only back to the function that
11902 hit an exception. */
11903 if (!(isec->has_toc_reloc
11904 || (isec->flags & SEC_CODE) == 0
11905 || strcmp (isec->name, ".fixup") == 0
11906 || isec->call_check_done))
11907 {
11908 if (toc_adjusting_stub_needed (info, isec) < 0)
11909 return FALSE;
11910 }
11911 /* Make all sections use the TOC assigned for this object file.
11912 This will be wrong for pasted sections; We fix that in
11913 check_pasted_section(). */
11914 if (elf_gp (isec->owner) != 0)
11915 htab->toc_curr = elf_gp (isec->owner);
11916 }
11917
11918 htab->sec_info[isec->id].toc_off = htab->toc_curr;
11919 return TRUE;
11920 }
11921
11922 /* Check that all .init and .fini sections use the same toc, if they
11923 have toc relocs. */
11924
11925 static bfd_boolean
11926 check_pasted_section (struct bfd_link_info *info, const char *name)
11927 {
11928 asection *o = bfd_get_section_by_name (info->output_bfd, name);
11929
11930 if (o != NULL)
11931 {
11932 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11933 bfd_vma toc_off = 0;
11934 asection *i;
11935
11936 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
11937 if (i->has_toc_reloc)
11938 {
11939 if (toc_off == 0)
11940 toc_off = htab->sec_info[i->id].toc_off;
11941 else if (toc_off != htab->sec_info[i->id].toc_off)
11942 return FALSE;
11943 }
11944
11945 if (toc_off == 0)
11946 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
11947 if (i->makes_toc_func_call)
11948 {
11949 toc_off = htab->sec_info[i->id].toc_off;
11950 break;
11951 }
11952
11953 /* Make sure the whole pasted function uses the same toc offset. */
11954 if (toc_off != 0)
11955 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
11956 htab->sec_info[i->id].toc_off = toc_off;
11957 }
11958 return TRUE;
11959 }
11960
11961 bfd_boolean
11962 ppc64_elf_check_init_fini (struct bfd_link_info *info)
11963 {
11964 return (check_pasted_section (info, ".init")
11965 & check_pasted_section (info, ".fini"));
11966 }
11967
11968 /* See whether we can group stub sections together. Grouping stub
11969 sections may result in fewer stubs. More importantly, we need to
11970 put all .init* and .fini* stubs at the beginning of the .init or
11971 .fini output sections respectively, because glibc splits the
11972 _init and _fini functions into multiple parts. Putting a stub in
11973 the middle of a function is not a good idea. */
11974
11975 static bfd_boolean
11976 group_sections (struct bfd_link_info *info,
11977 bfd_size_type stub_group_size,
11978 bfd_boolean stubs_always_before_branch)
11979 {
11980 struct ppc_link_hash_table *htab;
11981 asection *osec;
11982 bfd_size_type stub14_group_size;
11983 bfd_boolean suppress_size_errors;
11984
11985 htab = ppc_hash_table (info);
11986 if (htab == NULL)
11987 return FALSE;
11988
11989 suppress_size_errors = FALSE;
11990 stub14_group_size = stub_group_size >> 10;
11991 if (stub_group_size == 1)
11992 {
11993 /* Default values. */
11994 if (stubs_always_before_branch)
11995 {
11996 stub_group_size = 0x1e00000;
11997 stub14_group_size = 0x7800;
11998 }
11999 else
12000 {
12001 stub_group_size = 0x1c00000;
12002 stub14_group_size = 0x7000;
12003 }
12004 suppress_size_errors = TRUE;
12005 }
12006
12007 for (osec = info->output_bfd->sections; osec != NULL; osec = osec->next)
12008 {
12009 asection *tail;
12010
12011 if (osec->id >= htab->sec_info_arr_size)
12012 continue;
12013
12014 tail = htab->sec_info[osec->id].u.list;
12015 while (tail != NULL)
12016 {
12017 asection *curr;
12018 asection *prev;
12019 bfd_size_type total;
12020 bfd_boolean big_sec;
12021 bfd_vma curr_toc;
12022 struct map_stub *group;
12023
12024 curr = tail;
12025 total = tail->size;
12026 big_sec = total > (ppc64_elf_section_data (tail) != NULL
12027 && ppc64_elf_section_data (tail)->has_14bit_branch
12028 ? stub14_group_size : stub_group_size);
12029 if (big_sec && !suppress_size_errors)
12030 (*_bfd_error_handler) (_("%B section %A exceeds stub group size"),
12031 tail->owner, tail);
12032 curr_toc = htab->sec_info[tail->id].toc_off;
12033
12034 while ((prev = htab->sec_info[curr->id].u.list) != NULL
12035 && ((total += curr->output_offset - prev->output_offset)
12036 < (ppc64_elf_section_data (prev) != NULL
12037 && ppc64_elf_section_data (prev)->has_14bit_branch
12038 ? stub14_group_size : stub_group_size))
12039 && htab->sec_info[prev->id].toc_off == curr_toc)
12040 curr = prev;
12041
12042 /* OK, the size from the start of CURR to the end is less
12043 than stub_group_size and thus can be handled by one stub
12044 section. (or the tail section is itself larger than
12045 stub_group_size, in which case we may be toast.) We
12046 should really be keeping track of the total size of stubs
12047 added here, as stubs contribute to the final output
12048 section size. That's a little tricky, and this way will
12049 only break if stubs added make the total size more than
12050 2^25, ie. for the default stub_group_size, if stubs total
12051 more than 2097152 bytes, or nearly 75000 plt call stubs. */
12052 group = bfd_alloc (curr->owner, sizeof (*group));
12053 if (group == NULL)
12054 return FALSE;
12055 group->link_sec = curr;
12056 group->stub_sec = NULL;
12057 group->needs_save_res = 0;
12058 group->next = htab->group;
12059 htab->group = group;
12060 do
12061 {
12062 prev = htab->sec_info[tail->id].u.list;
12063 /* Set up this stub group. */
12064 htab->sec_info[tail->id].u.group = group;
12065 }
12066 while (tail != curr && (tail = prev) != NULL);
12067
12068 /* But wait, there's more! Input sections up to stub_group_size
12069 bytes before the stub section can be handled by it too.
12070 Don't do this if we have a really large section after the
12071 stubs, as adding more stubs increases the chance that
12072 branches may not reach into the stub section. */
12073 if (!stubs_always_before_branch && !big_sec)
12074 {
12075 total = 0;
12076 while (prev != NULL
12077 && ((total += tail->output_offset - prev->output_offset)
12078 < (ppc64_elf_section_data (prev) != NULL
12079 && ppc64_elf_section_data (prev)->has_14bit_branch
12080 ? stub14_group_size : stub_group_size))
12081 && htab->sec_info[prev->id].toc_off == curr_toc)
12082 {
12083 tail = prev;
12084 prev = htab->sec_info[tail->id].u.list;
12085 htab->sec_info[tail->id].u.group = group;
12086 }
12087 }
12088 tail = prev;
12089 }
12090 }
12091 return TRUE;
12092 }
12093
12094 static const unsigned char glink_eh_frame_cie[] =
12095 {
12096 0, 0, 0, 16, /* length. */
12097 0, 0, 0, 0, /* id. */
12098 1, /* CIE version. */
12099 'z', 'R', 0, /* Augmentation string. */
12100 4, /* Code alignment. */
12101 0x78, /* Data alignment. */
12102 65, /* RA reg. */
12103 1, /* Augmentation size. */
12104 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
12105 DW_CFA_def_cfa, 1, 0, /* def_cfa: r1 offset 0. */
12106 0, 0, 0, 0
12107 };
12108
12109 /* Stripping output sections is normally done before dynamic section
12110 symbols have been allocated. This function is called later, and
12111 handles cases like htab->brlt which is mapped to its own output
12112 section. */
12113
12114 static void
12115 maybe_strip_output (struct bfd_link_info *info, asection *isec)
12116 {
12117 if (isec->size == 0
12118 && isec->output_section->size == 0
12119 && !(isec->output_section->flags & SEC_KEEP)
12120 && !bfd_section_removed_from_list (info->output_bfd,
12121 isec->output_section)
12122 && elf_section_data (isec->output_section)->dynindx == 0)
12123 {
12124 isec->output_section->flags |= SEC_EXCLUDE;
12125 bfd_section_list_remove (info->output_bfd, isec->output_section);
12126 info->output_bfd->section_count--;
12127 }
12128 }
12129
12130 /* Determine and set the size of the stub section for a final link.
12131
12132 The basic idea here is to examine all the relocations looking for
12133 PC-relative calls to a target that is unreachable with a "bl"
12134 instruction. */
12135
12136 bfd_boolean
12137 ppc64_elf_size_stubs (struct bfd_link_info *info)
12138 {
12139 bfd_size_type stub_group_size;
12140 bfd_boolean stubs_always_before_branch;
12141 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12142
12143 if (htab == NULL)
12144 return FALSE;
12145
12146 if (htab->params->plt_thread_safe == -1 && !bfd_link_executable (info))
12147 htab->params->plt_thread_safe = 1;
12148 if (!htab->opd_abi)
12149 htab->params->plt_thread_safe = 0;
12150 else if (htab->params->plt_thread_safe == -1)
12151 {
12152 static const char *const thread_starter[] =
12153 {
12154 "pthread_create",
12155 /* libstdc++ */
12156 "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE",
12157 /* librt */
12158 "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio",
12159 "mq_notify", "create_timer",
12160 /* libanl */
12161 "getaddrinfo_a",
12162 /* libgomp */
12163 "GOMP_parallel",
12164 "GOMP_parallel_start",
12165 "GOMP_parallel_loop_static",
12166 "GOMP_parallel_loop_static_start",
12167 "GOMP_parallel_loop_dynamic",
12168 "GOMP_parallel_loop_dynamic_start",
12169 "GOMP_parallel_loop_guided",
12170 "GOMP_parallel_loop_guided_start",
12171 "GOMP_parallel_loop_runtime",
12172 "GOMP_parallel_loop_runtime_start",
12173 "GOMP_parallel_sections",
12174 "GOMP_parallel_sections_start",
12175 /* libgo */
12176 "__go_go",
12177 };
12178 unsigned i;
12179
12180 for (i = 0; i < ARRAY_SIZE (thread_starter); i++)
12181 {
12182 struct elf_link_hash_entry *h;
12183 h = elf_link_hash_lookup (&htab->elf, thread_starter[i],
12184 FALSE, FALSE, TRUE);
12185 htab->params->plt_thread_safe = h != NULL && h->ref_regular;
12186 if (htab->params->plt_thread_safe)
12187 break;
12188 }
12189 }
12190 stubs_always_before_branch = htab->params->group_size < 0;
12191 if (htab->params->group_size < 0)
12192 stub_group_size = -htab->params->group_size;
12193 else
12194 stub_group_size = htab->params->group_size;
12195
12196 if (!group_sections (info, stub_group_size, stubs_always_before_branch))
12197 return FALSE;
12198
12199 while (1)
12200 {
12201 bfd *input_bfd;
12202 unsigned int bfd_indx;
12203 struct map_stub *group;
12204 asection *stub_sec;
12205
12206 htab->stub_iteration += 1;
12207
12208 for (input_bfd = info->input_bfds, bfd_indx = 0;
12209 input_bfd != NULL;
12210 input_bfd = input_bfd->link.next, bfd_indx++)
12211 {
12212 Elf_Internal_Shdr *symtab_hdr;
12213 asection *section;
12214 Elf_Internal_Sym *local_syms = NULL;
12215
12216 if (!is_ppc64_elf (input_bfd))
12217 continue;
12218
12219 /* We'll need the symbol table in a second. */
12220 symtab_hdr = &elf_symtab_hdr (input_bfd);
12221 if (symtab_hdr->sh_info == 0)
12222 continue;
12223
12224 /* Walk over each section attached to the input bfd. */
12225 for (section = input_bfd->sections;
12226 section != NULL;
12227 section = section->next)
12228 {
12229 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
12230
12231 /* If there aren't any relocs, then there's nothing more
12232 to do. */
12233 if ((section->flags & SEC_RELOC) == 0
12234 || (section->flags & SEC_ALLOC) == 0
12235 || (section->flags & SEC_LOAD) == 0
12236 || (section->flags & SEC_CODE) == 0
12237 || section->reloc_count == 0)
12238 continue;
12239
12240 /* If this section is a link-once section that will be
12241 discarded, then don't create any stubs. */
12242 if (section->output_section == NULL
12243 || section->output_section->owner != info->output_bfd)
12244 continue;
12245
12246 /* Get the relocs. */
12247 internal_relocs
12248 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
12249 info->keep_memory);
12250 if (internal_relocs == NULL)
12251 goto error_ret_free_local;
12252
12253 /* Now examine each relocation. */
12254 irela = internal_relocs;
12255 irelaend = irela + section->reloc_count;
12256 for (; irela < irelaend; irela++)
12257 {
12258 enum elf_ppc64_reloc_type r_type;
12259 unsigned int r_indx;
12260 enum ppc_stub_type stub_type;
12261 struct ppc_stub_hash_entry *stub_entry;
12262 asection *sym_sec, *code_sec;
12263 bfd_vma sym_value, code_value;
12264 bfd_vma destination;
12265 unsigned long local_off;
12266 bfd_boolean ok_dest;
12267 struct ppc_link_hash_entry *hash;
12268 struct ppc_link_hash_entry *fdh;
12269 struct elf_link_hash_entry *h;
12270 Elf_Internal_Sym *sym;
12271 char *stub_name;
12272 const asection *id_sec;
12273 struct _opd_sec_data *opd;
12274 struct plt_entry *plt_ent;
12275
12276 r_type = ELF64_R_TYPE (irela->r_info);
12277 r_indx = ELF64_R_SYM (irela->r_info);
12278
12279 if (r_type >= R_PPC64_max)
12280 {
12281 bfd_set_error (bfd_error_bad_value);
12282 goto error_ret_free_internal;
12283 }
12284
12285 /* Only look for stubs on branch instructions. */
12286 if (r_type != R_PPC64_REL24
12287 && r_type != R_PPC64_REL14
12288 && r_type != R_PPC64_REL14_BRTAKEN
12289 && r_type != R_PPC64_REL14_BRNTAKEN)
12290 continue;
12291
12292 /* Now determine the call target, its name, value,
12293 section. */
12294 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
12295 r_indx, input_bfd))
12296 goto error_ret_free_internal;
12297 hash = (struct ppc_link_hash_entry *) h;
12298
12299 ok_dest = FALSE;
12300 fdh = NULL;
12301 sym_value = 0;
12302 if (hash == NULL)
12303 {
12304 sym_value = sym->st_value;
12305 if (sym_sec != NULL
12306 && sym_sec->output_section != NULL)
12307 ok_dest = TRUE;
12308 }
12309 else if (hash->elf.root.type == bfd_link_hash_defined
12310 || hash->elf.root.type == bfd_link_hash_defweak)
12311 {
12312 sym_value = hash->elf.root.u.def.value;
12313 if (sym_sec->output_section != NULL)
12314 ok_dest = TRUE;
12315 }
12316 else if (hash->elf.root.type == bfd_link_hash_undefweak
12317 || hash->elf.root.type == bfd_link_hash_undefined)
12318 {
12319 /* Recognise an old ABI func code entry sym, and
12320 use the func descriptor sym instead if it is
12321 defined. */
12322 if (hash->elf.root.root.string[0] == '.'
12323 && (fdh = lookup_fdh (hash, htab)) != NULL)
12324 {
12325 if (fdh->elf.root.type == bfd_link_hash_defined
12326 || fdh->elf.root.type == bfd_link_hash_defweak)
12327 {
12328 sym_sec = fdh->elf.root.u.def.section;
12329 sym_value = fdh->elf.root.u.def.value;
12330 if (sym_sec->output_section != NULL)
12331 ok_dest = TRUE;
12332 }
12333 else
12334 fdh = NULL;
12335 }
12336 }
12337 else
12338 {
12339 bfd_set_error (bfd_error_bad_value);
12340 goto error_ret_free_internal;
12341 }
12342
12343 destination = 0;
12344 local_off = 0;
12345 if (ok_dest)
12346 {
12347 sym_value += irela->r_addend;
12348 destination = (sym_value
12349 + sym_sec->output_offset
12350 + sym_sec->output_section->vma);
12351 local_off = PPC64_LOCAL_ENTRY_OFFSET (hash
12352 ? hash->elf.other
12353 : sym->st_other);
12354 }
12355
12356 code_sec = sym_sec;
12357 code_value = sym_value;
12358 opd = get_opd_info (sym_sec);
12359 if (opd != NULL)
12360 {
12361 bfd_vma dest;
12362
12363 if (hash == NULL && opd->adjust != NULL)
12364 {
12365 long adjust = opd->adjust[OPD_NDX (sym_value)];
12366 if (adjust == -1)
12367 continue;
12368 code_value += adjust;
12369 sym_value += adjust;
12370 }
12371 dest = opd_entry_value (sym_sec, sym_value,
12372 &code_sec, &code_value, FALSE);
12373 if (dest != (bfd_vma) -1)
12374 {
12375 destination = dest;
12376 if (fdh != NULL)
12377 {
12378 /* Fixup old ABI sym to point at code
12379 entry. */
12380 hash->elf.root.type = bfd_link_hash_defweak;
12381 hash->elf.root.u.def.section = code_sec;
12382 hash->elf.root.u.def.value = code_value;
12383 }
12384 }
12385 }
12386
12387 /* Determine what (if any) linker stub is needed. */
12388 plt_ent = NULL;
12389 stub_type = ppc_type_of_stub (section, irela, &hash,
12390 &plt_ent, destination,
12391 local_off);
12392
12393 if (stub_type != ppc_stub_plt_call)
12394 {
12395 /* Check whether we need a TOC adjusting stub.
12396 Since the linker pastes together pieces from
12397 different object files when creating the
12398 _init and _fini functions, it may be that a
12399 call to what looks like a local sym is in
12400 fact a call needing a TOC adjustment. */
12401 if (code_sec != NULL
12402 && code_sec->output_section != NULL
12403 && (htab->sec_info[code_sec->id].toc_off
12404 != htab->sec_info[section->id].toc_off)
12405 && (code_sec->has_toc_reloc
12406 || code_sec->makes_toc_func_call))
12407 stub_type = ppc_stub_long_branch_r2off;
12408 }
12409
12410 if (stub_type == ppc_stub_none)
12411 continue;
12412
12413 /* __tls_get_addr calls might be eliminated. */
12414 if (stub_type != ppc_stub_plt_call
12415 && hash != NULL
12416 && (hash == htab->tls_get_addr
12417 || hash == htab->tls_get_addr_fd)
12418 && section->has_tls_reloc
12419 && irela != internal_relocs)
12420 {
12421 /* Get tls info. */
12422 unsigned char *tls_mask;
12423
12424 if (!get_tls_mask (&tls_mask, NULL, NULL, &local_syms,
12425 irela - 1, input_bfd))
12426 goto error_ret_free_internal;
12427 if (*tls_mask != 0)
12428 continue;
12429 }
12430
12431 if (stub_type == ppc_stub_plt_call
12432 && irela + 1 < irelaend
12433 && irela[1].r_offset == irela->r_offset + 4
12434 && ELF64_R_TYPE (irela[1].r_info) == R_PPC64_TOCSAVE)
12435 {
12436 if (!tocsave_find (htab, INSERT,
12437 &local_syms, irela + 1, input_bfd))
12438 goto error_ret_free_internal;
12439 }
12440 else if (stub_type == ppc_stub_plt_call)
12441 stub_type = ppc_stub_plt_call_r2save;
12442
12443 /* Support for grouping stub sections. */
12444 id_sec = htab->sec_info[section->id].u.group->link_sec;
12445
12446 /* Get the name of this stub. */
12447 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
12448 if (!stub_name)
12449 goto error_ret_free_internal;
12450
12451 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
12452 stub_name, FALSE, FALSE);
12453 if (stub_entry != NULL)
12454 {
12455 /* The proper stub has already been created. */
12456 free (stub_name);
12457 if (stub_type == ppc_stub_plt_call_r2save)
12458 stub_entry->stub_type = stub_type;
12459 continue;
12460 }
12461
12462 stub_entry = ppc_add_stub (stub_name, section, info);
12463 if (stub_entry == NULL)
12464 {
12465 free (stub_name);
12466 error_ret_free_internal:
12467 if (elf_section_data (section)->relocs == NULL)
12468 free (internal_relocs);
12469 error_ret_free_local:
12470 if (local_syms != NULL
12471 && (symtab_hdr->contents
12472 != (unsigned char *) local_syms))
12473 free (local_syms);
12474 return FALSE;
12475 }
12476
12477 stub_entry->stub_type = stub_type;
12478 if (stub_type != ppc_stub_plt_call
12479 && stub_type != ppc_stub_plt_call_r2save)
12480 {
12481 stub_entry->target_value = code_value;
12482 stub_entry->target_section = code_sec;
12483 }
12484 else
12485 {
12486 stub_entry->target_value = sym_value;
12487 stub_entry->target_section = sym_sec;
12488 }
12489 stub_entry->h = hash;
12490 stub_entry->plt_ent = plt_ent;
12491 stub_entry->other = hash ? hash->elf.other : sym->st_other;
12492
12493 if (stub_entry->h != NULL)
12494 htab->stub_globals += 1;
12495 }
12496
12497 /* We're done with the internal relocs, free them. */
12498 if (elf_section_data (section)->relocs != internal_relocs)
12499 free (internal_relocs);
12500 }
12501
12502 if (local_syms != NULL
12503 && symtab_hdr->contents != (unsigned char *) local_syms)
12504 {
12505 if (!info->keep_memory)
12506 free (local_syms);
12507 else
12508 symtab_hdr->contents = (unsigned char *) local_syms;
12509 }
12510 }
12511
12512 /* We may have added some stubs. Find out the new size of the
12513 stub sections. */
12514 for (stub_sec = htab->params->stub_bfd->sections;
12515 stub_sec != NULL;
12516 stub_sec = stub_sec->next)
12517 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12518 {
12519 stub_sec->rawsize = stub_sec->size;
12520 stub_sec->size = 0;
12521 stub_sec->reloc_count = 0;
12522 stub_sec->flags &= ~SEC_RELOC;
12523 }
12524
12525 htab->brlt->size = 0;
12526 htab->brlt->reloc_count = 0;
12527 htab->brlt->flags &= ~SEC_RELOC;
12528 if (htab->relbrlt != NULL)
12529 htab->relbrlt->size = 0;
12530
12531 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
12532
12533 for (group = htab->group; group != NULL; group = group->next)
12534 if (group->needs_save_res)
12535 group->stub_sec->size += htab->sfpr->size;
12536
12537 if (info->emitrelocations
12538 && htab->glink != NULL && htab->glink->size != 0)
12539 {
12540 htab->glink->reloc_count = 1;
12541 htab->glink->flags |= SEC_RELOC;
12542 }
12543
12544 if (htab->glink_eh_frame != NULL
12545 && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
12546 && htab->glink_eh_frame->output_section->size != 0)
12547 {
12548 size_t size = 0, align;
12549
12550 for (stub_sec = htab->params->stub_bfd->sections;
12551 stub_sec != NULL;
12552 stub_sec = stub_sec->next)
12553 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12554 size += 24;
12555 if (htab->glink != NULL && htab->glink->size != 0)
12556 size += 24;
12557 if (size != 0)
12558 size += sizeof (glink_eh_frame_cie);
12559 align = 1;
12560 align <<= htab->glink_eh_frame->output_section->alignment_power;
12561 align -= 1;
12562 size = (size + align) & ~align;
12563 htab->glink_eh_frame->rawsize = htab->glink_eh_frame->size;
12564 htab->glink_eh_frame->size = size;
12565 }
12566
12567 if (htab->params->plt_stub_align != 0)
12568 for (stub_sec = htab->params->stub_bfd->sections;
12569 stub_sec != NULL;
12570 stub_sec = stub_sec->next)
12571 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12572 stub_sec->size = ((stub_sec->size
12573 + (1 << htab->params->plt_stub_align) - 1)
12574 & -(1 << htab->params->plt_stub_align));
12575
12576 for (stub_sec = htab->params->stub_bfd->sections;
12577 stub_sec != NULL;
12578 stub_sec = stub_sec->next)
12579 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
12580 && stub_sec->rawsize != stub_sec->size)
12581 break;
12582
12583 /* Exit from this loop when no stubs have been added, and no stubs
12584 have changed size. */
12585 if (stub_sec == NULL
12586 && (htab->glink_eh_frame == NULL
12587 || htab->glink_eh_frame->rawsize == htab->glink_eh_frame->size))
12588 break;
12589
12590 /* Ask the linker to do its stuff. */
12591 (*htab->params->layout_sections_again) ();
12592 }
12593
12594 if (htab->glink_eh_frame != NULL
12595 && htab->glink_eh_frame->size != 0)
12596 {
12597 bfd_vma val;
12598 bfd_byte *p, *last_fde;
12599 size_t last_fde_len, size, align, pad;
12600 asection *stub_sec;
12601
12602 p = bfd_zalloc (htab->glink_eh_frame->owner, htab->glink_eh_frame->size);
12603 if (p == NULL)
12604 return FALSE;
12605 htab->glink_eh_frame->contents = p;
12606 last_fde = p;
12607
12608 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
12609 /* CIE length (rewrite in case little-endian). */
12610 last_fde_len = sizeof (glink_eh_frame_cie) - 4;
12611 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
12612 p += sizeof (glink_eh_frame_cie);
12613
12614 for (stub_sec = htab->params->stub_bfd->sections;
12615 stub_sec != NULL;
12616 stub_sec = stub_sec->next)
12617 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12618 {
12619 last_fde = p;
12620 last_fde_len = 20;
12621 /* FDE length. */
12622 bfd_put_32 (htab->elf.dynobj, 20, p);
12623 p += 4;
12624 /* CIE pointer. */
12625 val = p - htab->glink_eh_frame->contents;
12626 bfd_put_32 (htab->elf.dynobj, val, p);
12627 p += 4;
12628 /* Offset to stub section, written later. */
12629 p += 4;
12630 /* stub section size. */
12631 bfd_put_32 (htab->elf.dynobj, stub_sec->size, p);
12632 p += 4;
12633 /* Augmentation. */
12634 p += 1;
12635 /* Pad. */
12636 p += 7;
12637 }
12638 if (htab->glink != NULL && htab->glink->size != 0)
12639 {
12640 last_fde = p;
12641 last_fde_len = 20;
12642 /* FDE length. */
12643 bfd_put_32 (htab->elf.dynobj, 20, p);
12644 p += 4;
12645 /* CIE pointer. */
12646 val = p - htab->glink_eh_frame->contents;
12647 bfd_put_32 (htab->elf.dynobj, val, p);
12648 p += 4;
12649 /* Offset to .glink, written later. */
12650 p += 4;
12651 /* .glink size. */
12652 bfd_put_32 (htab->elf.dynobj, htab->glink->size - 8, p);
12653 p += 4;
12654 /* Augmentation. */
12655 p += 1;
12656
12657 *p++ = DW_CFA_advance_loc + 1;
12658 *p++ = DW_CFA_register;
12659 *p++ = 65;
12660 *p++ = htab->opd_abi ? 12 : 0;
12661 *p++ = DW_CFA_advance_loc + 4;
12662 *p++ = DW_CFA_restore_extended;
12663 *p++ = 65;
12664 }
12665 /* Subsume any padding into the last FDE if user .eh_frame
12666 sections are aligned more than glink_eh_frame. Otherwise any
12667 zero padding will be seen as a terminator. */
12668 size = p - htab->glink_eh_frame->contents;
12669 align = 1;
12670 align <<= htab->glink_eh_frame->output_section->alignment_power;
12671 align -= 1;
12672 pad = ((size + align) & ~align) - size;
12673 htab->glink_eh_frame->size = size + pad;
12674 bfd_put_32 (htab->elf.dynobj, last_fde_len + pad, last_fde);
12675 }
12676
12677 maybe_strip_output (info, htab->brlt);
12678 if (htab->glink_eh_frame != NULL)
12679 maybe_strip_output (info, htab->glink_eh_frame);
12680
12681 return TRUE;
12682 }
12683
12684 /* Called after we have determined section placement. If sections
12685 move, we'll be called again. Provide a value for TOCstart. */
12686
12687 bfd_vma
12688 ppc64_elf_set_toc (struct bfd_link_info *info, bfd *obfd)
12689 {
12690 asection *s;
12691 bfd_vma TOCstart, adjust;
12692
12693 if (info != NULL)
12694 {
12695 struct elf_link_hash_entry *h;
12696 struct elf_link_hash_table *htab = elf_hash_table (info);
12697
12698 if (is_elf_hash_table (htab)
12699 && htab->hgot != NULL)
12700 h = htab->hgot;
12701 else
12702 {
12703 h = elf_link_hash_lookup (htab, ".TOC.", FALSE, FALSE, TRUE);
12704 if (is_elf_hash_table (htab))
12705 htab->hgot = h;
12706 }
12707 if (h != NULL
12708 && h->root.type == bfd_link_hash_defined
12709 && !h->root.linker_def
12710 && (!is_elf_hash_table (htab)
12711 || h->def_regular))
12712 {
12713 TOCstart = (h->root.u.def.value - TOC_BASE_OFF
12714 + h->root.u.def.section->output_offset
12715 + h->root.u.def.section->output_section->vma);
12716 _bfd_set_gp_value (obfd, TOCstart);
12717 return TOCstart;
12718 }
12719 }
12720
12721 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
12722 order. The TOC starts where the first of these sections starts. */
12723 s = bfd_get_section_by_name (obfd, ".got");
12724 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12725 s = bfd_get_section_by_name (obfd, ".toc");
12726 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12727 s = bfd_get_section_by_name (obfd, ".tocbss");
12728 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12729 s = bfd_get_section_by_name (obfd, ".plt");
12730 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12731 {
12732 /* This may happen for
12733 o references to TOC base (SYM@toc / TOC[tc0]) without a
12734 .toc directive
12735 o bad linker script
12736 o --gc-sections and empty TOC sections
12737
12738 FIXME: Warn user? */
12739
12740 /* Look for a likely section. We probably won't even be
12741 using TOCstart. */
12742 for (s = obfd->sections; s != NULL; s = s->next)
12743 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY
12744 | SEC_EXCLUDE))
12745 == (SEC_ALLOC | SEC_SMALL_DATA))
12746 break;
12747 if (s == NULL)
12748 for (s = obfd->sections; s != NULL; s = s->next)
12749 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_EXCLUDE))
12750 == (SEC_ALLOC | SEC_SMALL_DATA))
12751 break;
12752 if (s == NULL)
12753 for (s = obfd->sections; s != NULL; s = s->next)
12754 if ((s->flags & (SEC_ALLOC | SEC_READONLY | SEC_EXCLUDE))
12755 == SEC_ALLOC)
12756 break;
12757 if (s == NULL)
12758 for (s = obfd->sections; s != NULL; s = s->next)
12759 if ((s->flags & (SEC_ALLOC | SEC_EXCLUDE)) == SEC_ALLOC)
12760 break;
12761 }
12762
12763 TOCstart = 0;
12764 if (s != NULL)
12765 TOCstart = s->output_section->vma + s->output_offset;
12766
12767 /* Force alignment. */
12768 adjust = TOCstart & (TOC_BASE_ALIGN - 1);
12769 TOCstart -= adjust;
12770 _bfd_set_gp_value (obfd, TOCstart);
12771
12772 if (info != NULL && s != NULL)
12773 {
12774 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12775
12776 if (htab != NULL)
12777 {
12778 if (htab->elf.hgot != NULL)
12779 {
12780 htab->elf.hgot->root.u.def.value = TOC_BASE_OFF - adjust;
12781 htab->elf.hgot->root.u.def.section = s;
12782 }
12783 }
12784 else
12785 {
12786 struct bfd_link_hash_entry *bh = NULL;
12787 _bfd_generic_link_add_one_symbol (info, obfd, ".TOC.", BSF_GLOBAL,
12788 s, TOC_BASE_OFF - adjust,
12789 NULL, FALSE, FALSE, &bh);
12790 }
12791 }
12792 return TOCstart;
12793 }
12794
12795 /* Called via elf_link_hash_traverse from ppc64_elf_build_stubs to
12796 write out any global entry stubs. */
12797
12798 static bfd_boolean
12799 build_global_entry_stubs (struct elf_link_hash_entry *h, void *inf)
12800 {
12801 struct bfd_link_info *info;
12802 struct ppc_link_hash_table *htab;
12803 struct plt_entry *pent;
12804 asection *s;
12805
12806 if (h->root.type == bfd_link_hash_indirect)
12807 return TRUE;
12808
12809 if (!h->pointer_equality_needed)
12810 return TRUE;
12811
12812 if (h->def_regular)
12813 return TRUE;
12814
12815 info = inf;
12816 htab = ppc_hash_table (info);
12817 if (htab == NULL)
12818 return FALSE;
12819
12820 s = htab->glink;
12821 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
12822 if (pent->plt.offset != (bfd_vma) -1
12823 && pent->addend == 0)
12824 {
12825 bfd_byte *p;
12826 asection *plt;
12827 bfd_vma off;
12828
12829 p = s->contents + h->root.u.def.value;
12830 plt = htab->elf.splt;
12831 if (!htab->elf.dynamic_sections_created
12832 || h->dynindx == -1)
12833 plt = htab->elf.iplt;
12834 off = pent->plt.offset + plt->output_offset + plt->output_section->vma;
12835 off -= h->root.u.def.value + s->output_offset + s->output_section->vma;
12836
12837 if (off + 0x80008000 > 0xffffffff || (off & 3) != 0)
12838 {
12839 info->callbacks->einfo
12840 (_("%P: linkage table error against `%T'\n"),
12841 h->root.root.string);
12842 bfd_set_error (bfd_error_bad_value);
12843 htab->stub_error = TRUE;
12844 }
12845
12846 htab->stub_count[ppc_stub_global_entry - 1] += 1;
12847 if (htab->params->emit_stub_syms)
12848 {
12849 size_t len = strlen (h->root.root.string);
12850 char *name = bfd_malloc (sizeof "12345678.global_entry." + len);
12851
12852 if (name == NULL)
12853 return FALSE;
12854
12855 sprintf (name, "%08x.global_entry.%s", s->id, h->root.root.string);
12856 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
12857 if (h == NULL)
12858 return FALSE;
12859 if (h->root.type == bfd_link_hash_new)
12860 {
12861 h->root.type = bfd_link_hash_defined;
12862 h->root.u.def.section = s;
12863 h->root.u.def.value = p - s->contents;
12864 h->ref_regular = 1;
12865 h->def_regular = 1;
12866 h->ref_regular_nonweak = 1;
12867 h->forced_local = 1;
12868 h->non_elf = 0;
12869 h->root.linker_def = 1;
12870 }
12871 }
12872
12873 if (PPC_HA (off) != 0)
12874 {
12875 bfd_put_32 (s->owner, ADDIS_R12_R12 | PPC_HA (off), p);
12876 p += 4;
12877 }
12878 bfd_put_32 (s->owner, LD_R12_0R12 | PPC_LO (off), p);
12879 p += 4;
12880 bfd_put_32 (s->owner, MTCTR_R12, p);
12881 p += 4;
12882 bfd_put_32 (s->owner, BCTR, p);
12883 break;
12884 }
12885 return TRUE;
12886 }
12887
12888 /* Build all the stubs associated with the current output file.
12889 The stubs are kept in a hash table attached to the main linker
12890 hash table. This function is called via gldelf64ppc_finish. */
12891
12892 bfd_boolean
12893 ppc64_elf_build_stubs (struct bfd_link_info *info,
12894 char **stats)
12895 {
12896 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12897 struct map_stub *group;
12898 asection *stub_sec;
12899 bfd_byte *p;
12900 int stub_sec_count = 0;
12901
12902 if (htab == NULL)
12903 return FALSE;
12904
12905 /* Allocate memory to hold the linker stubs. */
12906 for (stub_sec = htab->params->stub_bfd->sections;
12907 stub_sec != NULL;
12908 stub_sec = stub_sec->next)
12909 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
12910 && stub_sec->size != 0)
12911 {
12912 stub_sec->contents = bfd_zalloc (htab->params->stub_bfd, stub_sec->size);
12913 if (stub_sec->contents == NULL)
12914 return FALSE;
12915 /* We want to check that built size is the same as calculated
12916 size. rawsize is a convenient location to use. */
12917 stub_sec->rawsize = stub_sec->size;
12918 stub_sec->size = 0;
12919 }
12920
12921 if (htab->glink != NULL && htab->glink->size != 0)
12922 {
12923 unsigned int indx;
12924 bfd_vma plt0;
12925
12926 /* Build the .glink plt call stub. */
12927 if (htab->params->emit_stub_syms)
12928 {
12929 struct elf_link_hash_entry *h;
12930 h = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
12931 TRUE, FALSE, FALSE);
12932 if (h == NULL)
12933 return FALSE;
12934 if (h->root.type == bfd_link_hash_new)
12935 {
12936 h->root.type = bfd_link_hash_defined;
12937 h->root.u.def.section = htab->glink;
12938 h->root.u.def.value = 8;
12939 h->ref_regular = 1;
12940 h->def_regular = 1;
12941 h->ref_regular_nonweak = 1;
12942 h->forced_local = 1;
12943 h->non_elf = 0;
12944 h->root.linker_def = 1;
12945 }
12946 }
12947 plt0 = (htab->elf.splt->output_section->vma
12948 + htab->elf.splt->output_offset
12949 - 16);
12950 if (info->emitrelocations)
12951 {
12952 Elf_Internal_Rela *r = get_relocs (htab->glink, 1);
12953 if (r == NULL)
12954 return FALSE;
12955 r->r_offset = (htab->glink->output_offset
12956 + htab->glink->output_section->vma);
12957 r->r_info = ELF64_R_INFO (0, R_PPC64_REL64);
12958 r->r_addend = plt0;
12959 }
12960 p = htab->glink->contents;
12961 plt0 -= htab->glink->output_section->vma + htab->glink->output_offset;
12962 bfd_put_64 (htab->glink->owner, plt0, p);
12963 p += 8;
12964 if (htab->opd_abi)
12965 {
12966 bfd_put_32 (htab->glink->owner, MFLR_R12, p);
12967 p += 4;
12968 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
12969 p += 4;
12970 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
12971 p += 4;
12972 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | (-16 & 0xfffc), p);
12973 p += 4;
12974 bfd_put_32 (htab->glink->owner, MTLR_R12, p);
12975 p += 4;
12976 bfd_put_32 (htab->glink->owner, ADD_R11_R2_R11, p);
12977 p += 4;
12978 bfd_put_32 (htab->glink->owner, LD_R12_0R11, p);
12979 p += 4;
12980 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | 8, p);
12981 p += 4;
12982 bfd_put_32 (htab->glink->owner, MTCTR_R12, p);
12983 p += 4;
12984 bfd_put_32 (htab->glink->owner, LD_R11_0R11 | 16, p);
12985 p += 4;
12986 }
12987 else
12988 {
12989 bfd_put_32 (htab->glink->owner, MFLR_R0, p);
12990 p += 4;
12991 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
12992 p += 4;
12993 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
12994 p += 4;
12995 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | (-16 & 0xfffc), p);
12996 p += 4;
12997 bfd_put_32 (htab->glink->owner, MTLR_R0, p);
12998 p += 4;
12999 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
13000 p += 4;
13001 bfd_put_32 (htab->glink->owner, ADD_R11_R2_R11, p);
13002 p += 4;
13003 bfd_put_32 (htab->glink->owner, ADDI_R0_R12 | (-48 & 0xffff), p);
13004 p += 4;
13005 bfd_put_32 (htab->glink->owner, LD_R12_0R11, p);
13006 p += 4;
13007 bfd_put_32 (htab->glink->owner, SRDI_R0_R0_2, p);
13008 p += 4;
13009 bfd_put_32 (htab->glink->owner, MTCTR_R12, p);
13010 p += 4;
13011 bfd_put_32 (htab->glink->owner, LD_R11_0R11 | 8, p);
13012 p += 4;
13013 }
13014 bfd_put_32 (htab->glink->owner, BCTR, p);
13015 p += 4;
13016 while (p - htab->glink->contents < GLINK_CALL_STUB_SIZE)
13017 {
13018 bfd_put_32 (htab->glink->owner, NOP, p);
13019 p += 4;
13020 }
13021
13022 /* Build the .glink lazy link call stubs. */
13023 indx = 0;
13024 while (p < htab->glink->contents + htab->glink->rawsize)
13025 {
13026 if (htab->opd_abi)
13027 {
13028 if (indx < 0x8000)
13029 {
13030 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
13031 p += 4;
13032 }
13033 else
13034 {
13035 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
13036 p += 4;
13037 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx),
13038 p);
13039 p += 4;
13040 }
13041 }
13042 bfd_put_32 (htab->glink->owner,
13043 B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p);
13044 indx++;
13045 p += 4;
13046 }
13047
13048 /* Build .glink global entry stubs. */
13049 if (htab->glink->size > htab->glink->rawsize)
13050 elf_link_hash_traverse (&htab->elf, build_global_entry_stubs, info);
13051 }
13052
13053 if (htab->brlt != NULL && htab->brlt->size != 0)
13054 {
13055 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
13056 htab->brlt->size);
13057 if (htab->brlt->contents == NULL)
13058 return FALSE;
13059 }
13060 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
13061 {
13062 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
13063 htab->relbrlt->size);
13064 if (htab->relbrlt->contents == NULL)
13065 return FALSE;
13066 }
13067
13068 /* Build the stubs as directed by the stub hash table. */
13069 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
13070
13071 for (group = htab->group; group != NULL; group = group->next)
13072 if (group->needs_save_res)
13073 {
13074 stub_sec = group->stub_sec;
13075 memcpy (stub_sec->contents + stub_sec->size, htab->sfpr->contents,
13076 htab->sfpr->size);
13077 if (htab->params->emit_stub_syms)
13078 {
13079 unsigned int i;
13080
13081 for (i = 0; i < ARRAY_SIZE (save_res_funcs); i++)
13082 if (!sfpr_define (info, &save_res_funcs[i], stub_sec))
13083 return FALSE;
13084 }
13085 stub_sec->size += htab->sfpr->size;
13086 }
13087
13088 if (htab->relbrlt != NULL)
13089 htab->relbrlt->reloc_count = 0;
13090
13091 if (htab->params->plt_stub_align != 0)
13092 for (stub_sec = htab->params->stub_bfd->sections;
13093 stub_sec != NULL;
13094 stub_sec = stub_sec->next)
13095 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
13096 stub_sec->size = ((stub_sec->size
13097 + (1 << htab->params->plt_stub_align) - 1)
13098 & -(1 << htab->params->plt_stub_align));
13099
13100 for (stub_sec = htab->params->stub_bfd->sections;
13101 stub_sec != NULL;
13102 stub_sec = stub_sec->next)
13103 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
13104 {
13105 stub_sec_count += 1;
13106 if (stub_sec->rawsize != stub_sec->size)
13107 break;
13108 }
13109
13110 /* Note that the glink_eh_frame check here is not only testing that
13111 the generated size matched the calculated size but also that
13112 bfd_elf_discard_info didn't make any changes to the section. */
13113 if (stub_sec != NULL
13114 || (htab->glink_eh_frame != NULL
13115 && htab->glink_eh_frame->rawsize != htab->glink_eh_frame->size))
13116 {
13117 htab->stub_error = TRUE;
13118 info->callbacks->einfo (_("%P: stubs don't match calculated size\n"));
13119 }
13120
13121 if (htab->stub_error)
13122 return FALSE;
13123
13124 if (stats != NULL)
13125 {
13126 *stats = bfd_malloc (500);
13127 if (*stats == NULL)
13128 return FALSE;
13129
13130 sprintf (*stats, _("linker stubs in %u group%s\n"
13131 " branch %lu\n"
13132 " toc adjust %lu\n"
13133 " long branch %lu\n"
13134 " long toc adj %lu\n"
13135 " plt call %lu\n"
13136 " plt call toc %lu\n"
13137 " global entry %lu"),
13138 stub_sec_count,
13139 stub_sec_count == 1 ? "" : "s",
13140 htab->stub_count[ppc_stub_long_branch - 1],
13141 htab->stub_count[ppc_stub_long_branch_r2off - 1],
13142 htab->stub_count[ppc_stub_plt_branch - 1],
13143 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
13144 htab->stub_count[ppc_stub_plt_call - 1],
13145 htab->stub_count[ppc_stub_plt_call_r2save - 1],
13146 htab->stub_count[ppc_stub_global_entry - 1]);
13147 }
13148 return TRUE;
13149 }
13150
13151 /* This function undoes the changes made by add_symbol_adjust. */
13152
13153 static bfd_boolean
13154 undo_symbol_twiddle (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
13155 {
13156 struct ppc_link_hash_entry *eh;
13157
13158 if (h->root.type == bfd_link_hash_indirect)
13159 return TRUE;
13160
13161 eh = (struct ppc_link_hash_entry *) h;
13162 if (eh->elf.root.type != bfd_link_hash_undefweak || !eh->was_undefined)
13163 return TRUE;
13164
13165 eh->elf.root.type = bfd_link_hash_undefined;
13166 return TRUE;
13167 }
13168
13169 void
13170 ppc64_elf_restore_symbols (struct bfd_link_info *info)
13171 {
13172 struct ppc_link_hash_table *htab = ppc_hash_table (info);
13173
13174 if (htab != NULL)
13175 elf_link_hash_traverse (&htab->elf, undo_symbol_twiddle, info);
13176 }
13177
13178 /* What to do when ld finds relocations against symbols defined in
13179 discarded sections. */
13180
13181 static unsigned int
13182 ppc64_elf_action_discarded (asection *sec)
13183 {
13184 if (strcmp (".opd", sec->name) == 0)
13185 return 0;
13186
13187 if (strcmp (".toc", sec->name) == 0)
13188 return 0;
13189
13190 if (strcmp (".toc1", sec->name) == 0)
13191 return 0;
13192
13193 return _bfd_elf_default_action_discarded (sec);
13194 }
13195
13196 /* The RELOCATE_SECTION function is called by the ELF backend linker
13197 to handle the relocations for a section.
13198
13199 The relocs are always passed as Rela structures; if the section
13200 actually uses Rel structures, the r_addend field will always be
13201 zero.
13202
13203 This function is responsible for adjust the section contents as
13204 necessary, and (if using Rela relocs and generating a
13205 relocatable output file) adjusting the reloc addend as
13206 necessary.
13207
13208 This function does not have to worry about setting the reloc
13209 address or the reloc symbol index.
13210
13211 LOCAL_SYMS is a pointer to the swapped in local symbols.
13212
13213 LOCAL_SECTIONS is an array giving the section in the input file
13214 corresponding to the st_shndx field of each local symbol.
13215
13216 The global hash table entry for the global symbols can be found
13217 via elf_sym_hashes (input_bfd).
13218
13219 When generating relocatable output, this function must handle
13220 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
13221 going to be the section symbol corresponding to the output
13222 section, which means that the addend must be adjusted
13223 accordingly. */
13224
13225 static bfd_boolean
13226 ppc64_elf_relocate_section (bfd *output_bfd,
13227 struct bfd_link_info *info,
13228 bfd *input_bfd,
13229 asection *input_section,
13230 bfd_byte *contents,
13231 Elf_Internal_Rela *relocs,
13232 Elf_Internal_Sym *local_syms,
13233 asection **local_sections)
13234 {
13235 struct ppc_link_hash_table *htab;
13236 Elf_Internal_Shdr *symtab_hdr;
13237 struct elf_link_hash_entry **sym_hashes;
13238 Elf_Internal_Rela *rel;
13239 Elf_Internal_Rela *wrel;
13240 Elf_Internal_Rela *relend;
13241 Elf_Internal_Rela outrel;
13242 bfd_byte *loc;
13243 struct got_entry **local_got_ents;
13244 bfd_vma TOCstart;
13245 bfd_boolean ret = TRUE;
13246 bfd_boolean is_opd;
13247 /* Assume 'at' branch hints. */
13248 bfd_boolean is_isa_v2 = TRUE;
13249 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
13250
13251 /* Initialize howto table if needed. */
13252 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
13253 ppc_howto_init ();
13254
13255 htab = ppc_hash_table (info);
13256 if (htab == NULL)
13257 return FALSE;
13258
13259 /* Don't relocate stub sections. */
13260 if (input_section->owner == htab->params->stub_bfd)
13261 return TRUE;
13262
13263 BFD_ASSERT (is_ppc64_elf (input_bfd));
13264
13265 local_got_ents = elf_local_got_ents (input_bfd);
13266 TOCstart = elf_gp (output_bfd);
13267 symtab_hdr = &elf_symtab_hdr (input_bfd);
13268 sym_hashes = elf_sym_hashes (input_bfd);
13269 is_opd = ppc64_elf_section_data (input_section)->sec_type == sec_opd;
13270
13271 rel = wrel = relocs;
13272 relend = relocs + input_section->reloc_count;
13273 for (; rel < relend; wrel++, rel++)
13274 {
13275 enum elf_ppc64_reloc_type r_type;
13276 bfd_vma addend;
13277 bfd_reloc_status_type r;
13278 Elf_Internal_Sym *sym;
13279 asection *sec;
13280 struct elf_link_hash_entry *h_elf;
13281 struct ppc_link_hash_entry *h;
13282 struct ppc_link_hash_entry *fdh;
13283 const char *sym_name;
13284 unsigned long r_symndx, toc_symndx;
13285 bfd_vma toc_addend;
13286 unsigned char tls_mask, tls_gd, tls_type;
13287 unsigned char sym_type;
13288 bfd_vma relocation;
13289 bfd_boolean unresolved_reloc;
13290 bfd_boolean warned;
13291 enum { DEST_NORMAL, DEST_OPD, DEST_STUB } reloc_dest;
13292 unsigned int insn;
13293 unsigned int mask;
13294 struct ppc_stub_hash_entry *stub_entry;
13295 bfd_vma max_br_offset;
13296 bfd_vma from;
13297 Elf_Internal_Rela orig_rel;
13298 reloc_howto_type *howto;
13299 struct reloc_howto_struct alt_howto;
13300
13301 again:
13302 orig_rel = *rel;
13303
13304 r_type = ELF64_R_TYPE (rel->r_info);
13305 r_symndx = ELF64_R_SYM (rel->r_info);
13306
13307 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
13308 symbol of the previous ADDR64 reloc. The symbol gives us the
13309 proper TOC base to use. */
13310 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
13311 && wrel != relocs
13312 && ELF64_R_TYPE (wrel[-1].r_info) == R_PPC64_ADDR64
13313 && is_opd)
13314 r_symndx = ELF64_R_SYM (wrel[-1].r_info);
13315
13316 sym = NULL;
13317 sec = NULL;
13318 h_elf = NULL;
13319 sym_name = NULL;
13320 unresolved_reloc = FALSE;
13321 warned = FALSE;
13322
13323 if (r_symndx < symtab_hdr->sh_info)
13324 {
13325 /* It's a local symbol. */
13326 struct _opd_sec_data *opd;
13327
13328 sym = local_syms + r_symndx;
13329 sec = local_sections[r_symndx];
13330 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
13331 sym_type = ELF64_ST_TYPE (sym->st_info);
13332 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
13333 opd = get_opd_info (sec);
13334 if (opd != NULL && opd->adjust != NULL)
13335 {
13336 long adjust = opd->adjust[OPD_NDX (sym->st_value
13337 + rel->r_addend)];
13338 if (adjust == -1)
13339 relocation = 0;
13340 else
13341 {
13342 /* If this is a relocation against the opd section sym
13343 and we have edited .opd, adjust the reloc addend so
13344 that ld -r and ld --emit-relocs output is correct.
13345 If it is a reloc against some other .opd symbol,
13346 then the symbol value will be adjusted later. */
13347 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
13348 rel->r_addend += adjust;
13349 else
13350 relocation += adjust;
13351 }
13352 }
13353 }
13354 else
13355 {
13356 bfd_boolean ignored;
13357
13358 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
13359 r_symndx, symtab_hdr, sym_hashes,
13360 h_elf, sec, relocation,
13361 unresolved_reloc, warned, ignored);
13362 sym_name = h_elf->root.root.string;
13363 sym_type = h_elf->type;
13364 if (sec != NULL
13365 && sec->owner == output_bfd
13366 && strcmp (sec->name, ".opd") == 0)
13367 {
13368 /* This is a symbol defined in a linker script. All
13369 such are defined in output sections, even those
13370 defined by simple assignment from a symbol defined in
13371 an input section. Transfer the symbol to an
13372 appropriate input .opd section, so that a branch to
13373 this symbol will be mapped to the location specified
13374 by the opd entry. */
13375 struct bfd_link_order *lo;
13376 for (lo = sec->map_head.link_order; lo != NULL; lo = lo->next)
13377 if (lo->type == bfd_indirect_link_order)
13378 {
13379 asection *isec = lo->u.indirect.section;
13380 if (h_elf->root.u.def.value >= isec->output_offset
13381 && h_elf->root.u.def.value < (isec->output_offset
13382 + isec->size))
13383 {
13384 h_elf->root.u.def.value -= isec->output_offset;
13385 h_elf->root.u.def.section = isec;
13386 sec = isec;
13387 break;
13388 }
13389 }
13390 }
13391 }
13392 h = (struct ppc_link_hash_entry *) h_elf;
13393
13394 if (sec != NULL && discarded_section (sec))
13395 {
13396 _bfd_clear_contents (ppc64_elf_howto_table[r_type],
13397 input_bfd, input_section,
13398 contents + rel->r_offset);
13399 wrel->r_offset = rel->r_offset;
13400 wrel->r_info = 0;
13401 wrel->r_addend = 0;
13402
13403 /* For ld -r, remove relocations in debug sections against
13404 sections defined in discarded sections. Not done for
13405 non-debug to preserve relocs in .eh_frame which the
13406 eh_frame editing code expects to be present. */
13407 if (bfd_link_relocatable (info)
13408 && (input_section->flags & SEC_DEBUGGING))
13409 wrel--;
13410
13411 continue;
13412 }
13413
13414 if (bfd_link_relocatable (info))
13415 goto copy_reloc;
13416
13417 if (h != NULL && &h->elf == htab->elf.hgot)
13418 {
13419 relocation = TOCstart + htab->sec_info[input_section->id].toc_off;
13420 sec = bfd_abs_section_ptr;
13421 unresolved_reloc = FALSE;
13422 }
13423
13424 /* TLS optimizations. Replace instruction sequences and relocs
13425 based on information we collected in tls_optimize. We edit
13426 RELOCS so that --emit-relocs will output something sensible
13427 for the final instruction stream. */
13428 tls_mask = 0;
13429 tls_gd = 0;
13430 toc_symndx = 0;
13431 if (h != NULL)
13432 tls_mask = h->tls_mask;
13433 else if (local_got_ents != NULL)
13434 {
13435 struct plt_entry **local_plt = (struct plt_entry **)
13436 (local_got_ents + symtab_hdr->sh_info);
13437 unsigned char *lgot_masks = (unsigned char *)
13438 (local_plt + symtab_hdr->sh_info);
13439 tls_mask = lgot_masks[r_symndx];
13440 }
13441 if (tls_mask == 0
13442 && (r_type == R_PPC64_TLS
13443 || r_type == R_PPC64_TLSGD
13444 || r_type == R_PPC64_TLSLD))
13445 {
13446 /* Check for toc tls entries. */
13447 unsigned char *toc_tls;
13448
13449 if (!get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
13450 &local_syms, rel, input_bfd))
13451 return FALSE;
13452
13453 if (toc_tls)
13454 tls_mask = *toc_tls;
13455 }
13456
13457 /* Check that tls relocs are used with tls syms, and non-tls
13458 relocs are used with non-tls syms. */
13459 if (r_symndx != STN_UNDEF
13460 && r_type != R_PPC64_NONE
13461 && (h == NULL
13462 || h->elf.root.type == bfd_link_hash_defined
13463 || h->elf.root.type == bfd_link_hash_defweak)
13464 && (IS_PPC64_TLS_RELOC (r_type)
13465 != (sym_type == STT_TLS
13466 || (sym_type == STT_SECTION
13467 && (sec->flags & SEC_THREAD_LOCAL) != 0))))
13468 {
13469 if (tls_mask != 0
13470 && (r_type == R_PPC64_TLS
13471 || r_type == R_PPC64_TLSGD
13472 || r_type == R_PPC64_TLSLD))
13473 /* R_PPC64_TLS is OK against a symbol in the TOC. */
13474 ;
13475 else
13476 info->callbacks->einfo
13477 (!IS_PPC64_TLS_RELOC (r_type)
13478 ? _("%P: %H: %s used with TLS symbol `%T'\n")
13479 : _("%P: %H: %s used with non-TLS symbol `%T'\n"),
13480 input_bfd, input_section, rel->r_offset,
13481 ppc64_elf_howto_table[r_type]->name,
13482 sym_name);
13483 }
13484
13485 /* Ensure reloc mapping code below stays sane. */
13486 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
13487 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
13488 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
13489 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
13490 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
13491 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
13492 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
13493 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
13494 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
13495 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
13496 abort ();
13497
13498 switch (r_type)
13499 {
13500 default:
13501 break;
13502
13503 case R_PPC64_LO_DS_OPT:
13504 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
13505 if ((insn & (0x3f << 26)) != 58u << 26)
13506 abort ();
13507 insn += (14u << 26) - (58u << 26);
13508 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
13509 r_type = R_PPC64_TOC16_LO;
13510 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13511 break;
13512
13513 case R_PPC64_TOC16:
13514 case R_PPC64_TOC16_LO:
13515 case R_PPC64_TOC16_DS:
13516 case R_PPC64_TOC16_LO_DS:
13517 {
13518 /* Check for toc tls entries. */
13519 unsigned char *toc_tls;
13520 int retval;
13521
13522 retval = get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
13523 &local_syms, rel, input_bfd);
13524 if (retval == 0)
13525 return FALSE;
13526
13527 if (toc_tls)
13528 {
13529 tls_mask = *toc_tls;
13530 if (r_type == R_PPC64_TOC16_DS
13531 || r_type == R_PPC64_TOC16_LO_DS)
13532 {
13533 if (tls_mask != 0
13534 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
13535 goto toctprel;
13536 }
13537 else
13538 {
13539 /* If we found a GD reloc pair, then we might be
13540 doing a GD->IE transition. */
13541 if (retval == 2)
13542 {
13543 tls_gd = TLS_TPRELGD;
13544 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13545 goto tls_ldgd_opt;
13546 }
13547 else if (retval == 3)
13548 {
13549 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13550 goto tls_ldgd_opt;
13551 }
13552 }
13553 }
13554 }
13555 break;
13556
13557 case R_PPC64_GOT_TPREL16_HI:
13558 case R_PPC64_GOT_TPREL16_HA:
13559 if (tls_mask != 0
13560 && (tls_mask & TLS_TPREL) == 0)
13561 {
13562 rel->r_offset -= d_offset;
13563 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
13564 r_type = R_PPC64_NONE;
13565 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13566 }
13567 break;
13568
13569 case R_PPC64_GOT_TPREL16_DS:
13570 case R_PPC64_GOT_TPREL16_LO_DS:
13571 if (tls_mask != 0
13572 && (tls_mask & TLS_TPREL) == 0)
13573 {
13574 toctprel:
13575 insn = bfd_get_32 (output_bfd,
13576 contents + rel->r_offset - d_offset);
13577 insn &= 31 << 21;
13578 insn |= 0x3c0d0000; /* addis 0,13,0 */
13579 bfd_put_32 (output_bfd, insn,
13580 contents + rel->r_offset - d_offset);
13581 r_type = R_PPC64_TPREL16_HA;
13582 if (toc_symndx != 0)
13583 {
13584 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
13585 rel->r_addend = toc_addend;
13586 /* We changed the symbol. Start over in order to
13587 get h, sym, sec etc. right. */
13588 goto again;
13589 }
13590 else
13591 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13592 }
13593 break;
13594
13595 case R_PPC64_TLS:
13596 if (tls_mask != 0
13597 && (tls_mask & TLS_TPREL) == 0)
13598 {
13599 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
13600 insn = _bfd_elf_ppc_at_tls_transform (insn, 13);
13601 if (insn == 0)
13602 abort ();
13603 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
13604 /* Was PPC64_TLS which sits on insn boundary, now
13605 PPC64_TPREL16_LO which is at low-order half-word. */
13606 rel->r_offset += d_offset;
13607 r_type = R_PPC64_TPREL16_LO;
13608 if (toc_symndx != 0)
13609 {
13610 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
13611 rel->r_addend = toc_addend;
13612 /* We changed the symbol. Start over in order to
13613 get h, sym, sec etc. right. */
13614 goto again;
13615 }
13616 else
13617 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13618 }
13619 break;
13620
13621 case R_PPC64_GOT_TLSGD16_HI:
13622 case R_PPC64_GOT_TLSGD16_HA:
13623 tls_gd = TLS_TPRELGD;
13624 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13625 goto tls_gdld_hi;
13626 break;
13627
13628 case R_PPC64_GOT_TLSLD16_HI:
13629 case R_PPC64_GOT_TLSLD16_HA:
13630 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13631 {
13632 tls_gdld_hi:
13633 if ((tls_mask & tls_gd) != 0)
13634 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
13635 + R_PPC64_GOT_TPREL16_DS);
13636 else
13637 {
13638 rel->r_offset -= d_offset;
13639 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
13640 r_type = R_PPC64_NONE;
13641 }
13642 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13643 }
13644 break;
13645
13646 case R_PPC64_GOT_TLSGD16:
13647 case R_PPC64_GOT_TLSGD16_LO:
13648 tls_gd = TLS_TPRELGD;
13649 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13650 goto tls_ldgd_opt;
13651 break;
13652
13653 case R_PPC64_GOT_TLSLD16:
13654 case R_PPC64_GOT_TLSLD16_LO:
13655 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13656 {
13657 unsigned int insn1, insn2, insn3;
13658 bfd_vma offset;
13659
13660 tls_ldgd_opt:
13661 offset = (bfd_vma) -1;
13662 /* If not using the newer R_PPC64_TLSGD/LD to mark
13663 __tls_get_addr calls, we must trust that the call
13664 stays with its arg setup insns, ie. that the next
13665 reloc is the __tls_get_addr call associated with
13666 the current reloc. Edit both insns. */
13667 if (input_section->has_tls_get_addr_call
13668 && rel + 1 < relend
13669 && branch_reloc_hash_match (input_bfd, rel + 1,
13670 htab->tls_get_addr,
13671 htab->tls_get_addr_fd))
13672 offset = rel[1].r_offset;
13673 /* We read the low GOT_TLS (or TOC16) insn because we
13674 need to keep the destination reg. It may be
13675 something other than the usual r3, and moved to r3
13676 before the call by intervening code. */
13677 insn1 = bfd_get_32 (output_bfd,
13678 contents + rel->r_offset - d_offset);
13679 if ((tls_mask & tls_gd) != 0)
13680 {
13681 /* IE */
13682 insn1 &= (0x1f << 21) | (0x1f << 16);
13683 insn1 |= 58 << 26; /* ld */
13684 insn2 = 0x7c636a14; /* add 3,3,13 */
13685 if (offset != (bfd_vma) -1)
13686 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13687 if ((tls_mask & TLS_EXPLICIT) == 0)
13688 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
13689 + R_PPC64_GOT_TPREL16_DS);
13690 else
13691 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
13692 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13693 }
13694 else
13695 {
13696 /* LE */
13697 insn1 &= 0x1f << 21;
13698 insn1 |= 0x3c0d0000; /* addis r,13,0 */
13699 insn2 = 0x38630000; /* addi 3,3,0 */
13700 if (tls_gd == 0)
13701 {
13702 /* Was an LD reloc. */
13703 if (toc_symndx)
13704 sec = local_sections[toc_symndx];
13705 for (r_symndx = 0;
13706 r_symndx < symtab_hdr->sh_info;
13707 r_symndx++)
13708 if (local_sections[r_symndx] == sec)
13709 break;
13710 if (r_symndx >= symtab_hdr->sh_info)
13711 r_symndx = STN_UNDEF;
13712 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
13713 if (r_symndx != STN_UNDEF)
13714 rel->r_addend -= (local_syms[r_symndx].st_value
13715 + sec->output_offset
13716 + sec->output_section->vma);
13717 }
13718 else if (toc_symndx != 0)
13719 {
13720 r_symndx = toc_symndx;
13721 rel->r_addend = toc_addend;
13722 }
13723 r_type = R_PPC64_TPREL16_HA;
13724 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13725 if (offset != (bfd_vma) -1)
13726 {
13727 rel[1].r_info = ELF64_R_INFO (r_symndx,
13728 R_PPC64_TPREL16_LO);
13729 rel[1].r_offset = offset + d_offset;
13730 rel[1].r_addend = rel->r_addend;
13731 }
13732 }
13733 bfd_put_32 (output_bfd, insn1,
13734 contents + rel->r_offset - d_offset);
13735 if (offset != (bfd_vma) -1)
13736 {
13737 insn3 = bfd_get_32 (output_bfd,
13738 contents + offset + 4);
13739 if (insn3 == NOP
13740 || insn3 == CROR_151515 || insn3 == CROR_313131)
13741 {
13742 rel[1].r_offset += 4;
13743 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
13744 insn2 = NOP;
13745 }
13746 bfd_put_32 (output_bfd, insn2, contents + offset);
13747 }
13748 if ((tls_mask & tls_gd) == 0
13749 && (tls_gd == 0 || toc_symndx != 0))
13750 {
13751 /* We changed the symbol. Start over in order
13752 to get h, sym, sec etc. right. */
13753 goto again;
13754 }
13755 }
13756 break;
13757
13758 case R_PPC64_TLSGD:
13759 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13760 {
13761 unsigned int insn2, insn3;
13762 bfd_vma offset = rel->r_offset;
13763
13764 if ((tls_mask & TLS_TPRELGD) != 0)
13765 {
13766 /* IE */
13767 r_type = R_PPC64_NONE;
13768 insn2 = 0x7c636a14; /* add 3,3,13 */
13769 }
13770 else
13771 {
13772 /* LE */
13773 if (toc_symndx != 0)
13774 {
13775 r_symndx = toc_symndx;
13776 rel->r_addend = toc_addend;
13777 }
13778 r_type = R_PPC64_TPREL16_LO;
13779 rel->r_offset = offset + d_offset;
13780 insn2 = 0x38630000; /* addi 3,3,0 */
13781 }
13782 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13783 /* Zap the reloc on the _tls_get_addr call too. */
13784 BFD_ASSERT (offset == rel[1].r_offset);
13785 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13786 insn3 = bfd_get_32 (output_bfd,
13787 contents + offset + 4);
13788 if (insn3 == NOP
13789 || insn3 == CROR_151515 || insn3 == CROR_313131)
13790 {
13791 rel->r_offset += 4;
13792 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
13793 insn2 = NOP;
13794 }
13795 bfd_put_32 (output_bfd, insn2, contents + offset);
13796 if ((tls_mask & TLS_TPRELGD) == 0 && toc_symndx != 0)
13797 goto again;
13798 }
13799 break;
13800
13801 case R_PPC64_TLSLD:
13802 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13803 {
13804 unsigned int insn2, insn3;
13805 bfd_vma offset = rel->r_offset;
13806
13807 if (toc_symndx)
13808 sec = local_sections[toc_symndx];
13809 for (r_symndx = 0;
13810 r_symndx < symtab_hdr->sh_info;
13811 r_symndx++)
13812 if (local_sections[r_symndx] == sec)
13813 break;
13814 if (r_symndx >= symtab_hdr->sh_info)
13815 r_symndx = STN_UNDEF;
13816 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
13817 if (r_symndx != STN_UNDEF)
13818 rel->r_addend -= (local_syms[r_symndx].st_value
13819 + sec->output_offset
13820 + sec->output_section->vma);
13821
13822 r_type = R_PPC64_TPREL16_LO;
13823 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13824 rel->r_offset = offset + d_offset;
13825 /* Zap the reloc on the _tls_get_addr call too. */
13826 BFD_ASSERT (offset == rel[1].r_offset);
13827 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13828 insn2 = 0x38630000; /* addi 3,3,0 */
13829 insn3 = bfd_get_32 (output_bfd,
13830 contents + offset + 4);
13831 if (insn3 == NOP
13832 || insn3 == CROR_151515 || insn3 == CROR_313131)
13833 {
13834 rel->r_offset += 4;
13835 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
13836 insn2 = NOP;
13837 }
13838 bfd_put_32 (output_bfd, insn2, contents + offset);
13839 goto again;
13840 }
13841 break;
13842
13843 case R_PPC64_DTPMOD64:
13844 if (rel + 1 < relend
13845 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
13846 && rel[1].r_offset == rel->r_offset + 8)
13847 {
13848 if ((tls_mask & TLS_GD) == 0)
13849 {
13850 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
13851 if ((tls_mask & TLS_TPRELGD) != 0)
13852 r_type = R_PPC64_TPREL64;
13853 else
13854 {
13855 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
13856 r_type = R_PPC64_NONE;
13857 }
13858 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13859 }
13860 }
13861 else
13862 {
13863 if ((tls_mask & TLS_LD) == 0)
13864 {
13865 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
13866 r_type = R_PPC64_NONE;
13867 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13868 }
13869 }
13870 break;
13871
13872 case R_PPC64_TPREL64:
13873 if ((tls_mask & TLS_TPREL) == 0)
13874 {
13875 r_type = R_PPC64_NONE;
13876 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13877 }
13878 break;
13879
13880 case R_PPC64_ENTRY:
13881 relocation = TOCstart + htab->sec_info[input_section->id].toc_off;
13882 if (!bfd_link_pic (info)
13883 && !info->traditional_format
13884 && relocation + 0x80008000 <= 0xffffffff)
13885 {
13886 unsigned int insn1, insn2;
13887
13888 insn1 = bfd_get_32 (input_bfd, contents + rel->r_offset);
13889 insn2 = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
13890 if ((insn1 & ~0xfffc) == LD_R2_0R12
13891 && insn2 == ADD_R2_R2_R12)
13892 {
13893 bfd_put_32 (output_bfd,
13894 LIS_R2 + PPC_HA (relocation),
13895 contents + rel->r_offset);
13896 bfd_put_32 (output_bfd,
13897 ADDI_R2_R2 + PPC_LO (relocation),
13898 contents + rel->r_offset + 4);
13899 }
13900 }
13901 else
13902 {
13903 relocation -= (rel->r_offset
13904 + input_section->output_offset
13905 + input_section->output_section->vma);
13906 if (relocation + 0x80008000 <= 0xffffffff)
13907 {
13908 unsigned int insn1, insn2;
13909
13910 insn1 = bfd_get_32 (input_bfd, contents + rel->r_offset);
13911 insn2 = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
13912 if ((insn1 & ~0xfffc) == LD_R2_0R12
13913 && insn2 == ADD_R2_R2_R12)
13914 {
13915 bfd_put_32 (output_bfd,
13916 ADDIS_R2_R12 + PPC_HA (relocation),
13917 contents + rel->r_offset);
13918 bfd_put_32 (output_bfd,
13919 ADDI_R2_R2 + PPC_LO (relocation),
13920 contents + rel->r_offset + 4);
13921 }
13922 }
13923 }
13924 break;
13925
13926 case R_PPC64_REL16_HA:
13927 /* If we are generating a non-PIC executable, edit
13928 . 0: addis 2,12,.TOC.-0b@ha
13929 . addi 2,2,.TOC.-0b@l
13930 used by ELFv2 global entry points to set up r2, to
13931 . lis 2,.TOC.@ha
13932 . addi 2,2,.TOC.@l
13933 if .TOC. is in range. */
13934 if (!bfd_link_pic (info)
13935 && !info->traditional_format
13936 && !htab->opd_abi
13937 && h != NULL && &h->elf == htab->elf.hgot
13938 && rel + 1 < relend
13939 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_REL16_LO)
13940 && rel[1].r_offset == rel->r_offset + 4
13941 && rel[1].r_addend == rel->r_addend + 4
13942 && relocation + 0x80008000 <= 0xffffffff)
13943 {
13944 unsigned int insn1, insn2;
13945 bfd_vma offset = rel->r_offset - d_offset;
13946 insn1 = bfd_get_32 (output_bfd, contents + offset);
13947 insn2 = bfd_get_32 (output_bfd, contents + offset + 4);
13948 if ((insn1 & 0xffff0000) == ADDIS_R2_R12
13949 && (insn2 & 0xffff0000) == ADDI_R2_R2)
13950 {
13951 r_type = R_PPC64_ADDR16_HA;
13952 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13953 rel->r_addend -= d_offset;
13954 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_ADDR16_LO);
13955 rel[1].r_addend -= d_offset + 4;
13956 bfd_put_32 (output_bfd, LIS_R2, contents + offset);
13957 }
13958 }
13959 break;
13960 }
13961
13962 /* Handle other relocations that tweak non-addend part of insn. */
13963 insn = 0;
13964 max_br_offset = 1 << 25;
13965 addend = rel->r_addend;
13966 reloc_dest = DEST_NORMAL;
13967 switch (r_type)
13968 {
13969 default:
13970 break;
13971
13972 case R_PPC64_TOCSAVE:
13973 if (relocation + addend == (rel->r_offset
13974 + input_section->output_offset
13975 + input_section->output_section->vma)
13976 && tocsave_find (htab, NO_INSERT,
13977 &local_syms, rel, input_bfd))
13978 {
13979 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
13980 if (insn == NOP
13981 || insn == CROR_151515 || insn == CROR_313131)
13982 bfd_put_32 (input_bfd,
13983 STD_R2_0R1 + STK_TOC (htab),
13984 contents + rel->r_offset);
13985 }
13986 break;
13987
13988 /* Branch taken prediction relocations. */
13989 case R_PPC64_ADDR14_BRTAKEN:
13990 case R_PPC64_REL14_BRTAKEN:
13991 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
13992 /* Fall thru. */
13993
13994 /* Branch not taken prediction relocations. */
13995 case R_PPC64_ADDR14_BRNTAKEN:
13996 case R_PPC64_REL14_BRNTAKEN:
13997 insn |= bfd_get_32 (output_bfd,
13998 contents + rel->r_offset) & ~(0x01 << 21);
13999 /* Fall thru. */
14000
14001 case R_PPC64_REL14:
14002 max_br_offset = 1 << 15;
14003 /* Fall thru. */
14004
14005 case R_PPC64_REL24:
14006 /* Calls to functions with a different TOC, such as calls to
14007 shared objects, need to alter the TOC pointer. This is
14008 done using a linkage stub. A REL24 branching to these
14009 linkage stubs needs to be followed by a nop, as the nop
14010 will be replaced with an instruction to restore the TOC
14011 base pointer. */
14012 fdh = h;
14013 if (h != NULL
14014 && h->oh != NULL
14015 && h->oh->is_func_descriptor)
14016 fdh = ppc_follow_link (h->oh);
14017 stub_entry = ppc_get_stub_entry (input_section, sec, fdh, &orig_rel,
14018 htab);
14019 if (stub_entry != NULL
14020 && (stub_entry->stub_type == ppc_stub_plt_call
14021 || stub_entry->stub_type == ppc_stub_plt_call_r2save
14022 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
14023 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
14024 {
14025 bfd_boolean can_plt_call = FALSE;
14026
14027 /* All of these stubs will modify r2, so there must be a
14028 branch and link followed by a nop. The nop is
14029 replaced by an insn to restore r2. */
14030 if (rel->r_offset + 8 <= input_section->size)
14031 {
14032 unsigned long br;
14033
14034 br = bfd_get_32 (input_bfd,
14035 contents + rel->r_offset);
14036 if ((br & 1) != 0)
14037 {
14038 unsigned long nop;
14039
14040 nop = bfd_get_32 (input_bfd,
14041 contents + rel->r_offset + 4);
14042 if (nop == NOP
14043 || nop == CROR_151515 || nop == CROR_313131)
14044 {
14045 if (h != NULL
14046 && (h == htab->tls_get_addr_fd
14047 || h == htab->tls_get_addr)
14048 && htab->params->tls_get_addr_opt)
14049 {
14050 /* Special stub used, leave nop alone. */
14051 }
14052 else
14053 bfd_put_32 (input_bfd,
14054 LD_R2_0R1 + STK_TOC (htab),
14055 contents + rel->r_offset + 4);
14056 can_plt_call = TRUE;
14057 }
14058 }
14059 }
14060
14061 if (!can_plt_call && h != NULL)
14062 {
14063 const char *name = h->elf.root.root.string;
14064
14065 if (*name == '.')
14066 ++name;
14067
14068 if (strncmp (name, "__libc_start_main", 17) == 0
14069 && (name[17] == 0 || name[17] == '@'))
14070 {
14071 /* Allow crt1 branch to go via a toc adjusting
14072 stub. Other calls that never return could do
14073 the same, if we could detect such. */
14074 can_plt_call = TRUE;
14075 }
14076 }
14077
14078 if (!can_plt_call)
14079 {
14080 /* g++ as of 20130507 emits self-calls without a
14081 following nop. This is arguably wrong since we
14082 have conflicting information. On the one hand a
14083 global symbol and on the other a local call
14084 sequence, but don't error for this special case.
14085 It isn't possible to cheaply verify we have
14086 exactly such a call. Allow all calls to the same
14087 section. */
14088 asection *code_sec = sec;
14089
14090 if (get_opd_info (sec) != NULL)
14091 {
14092 bfd_vma off = (relocation + addend
14093 - sec->output_section->vma
14094 - sec->output_offset);
14095
14096 opd_entry_value (sec, off, &code_sec, NULL, FALSE);
14097 }
14098 if (code_sec == input_section)
14099 can_plt_call = TRUE;
14100 }
14101
14102 if (!can_plt_call)
14103 {
14104 if (stub_entry->stub_type == ppc_stub_plt_call
14105 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14106 info->callbacks->einfo
14107 (_("%P: %H: call to `%T' lacks nop, can't restore toc; "
14108 "recompile with -fPIC\n"),
14109 input_bfd, input_section, rel->r_offset, sym_name);
14110 else
14111 info->callbacks->einfo
14112 (_("%P: %H: call to `%T' lacks nop, can't restore toc; "
14113 "(-mcmodel=small toc adjust stub)\n"),
14114 input_bfd, input_section, rel->r_offset, sym_name);
14115
14116 bfd_set_error (bfd_error_bad_value);
14117 ret = FALSE;
14118 }
14119
14120 if (can_plt_call
14121 && (stub_entry->stub_type == ppc_stub_plt_call
14122 || stub_entry->stub_type == ppc_stub_plt_call_r2save))
14123 unresolved_reloc = FALSE;
14124 }
14125
14126 if ((stub_entry == NULL
14127 || stub_entry->stub_type == ppc_stub_long_branch
14128 || stub_entry->stub_type == ppc_stub_plt_branch)
14129 && get_opd_info (sec) != NULL)
14130 {
14131 /* The branch destination is the value of the opd entry. */
14132 bfd_vma off = (relocation + addend
14133 - sec->output_section->vma
14134 - sec->output_offset);
14135 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL, FALSE);
14136 if (dest != (bfd_vma) -1)
14137 {
14138 relocation = dest;
14139 addend = 0;
14140 reloc_dest = DEST_OPD;
14141 }
14142 }
14143
14144 /* If the branch is out of reach we ought to have a long
14145 branch stub. */
14146 from = (rel->r_offset
14147 + input_section->output_offset
14148 + input_section->output_section->vma);
14149
14150 relocation += PPC64_LOCAL_ENTRY_OFFSET (fdh
14151 ? fdh->elf.other
14152 : sym->st_other);
14153
14154 if (stub_entry != NULL
14155 && (stub_entry->stub_type == ppc_stub_long_branch
14156 || stub_entry->stub_type == ppc_stub_plt_branch)
14157 && (r_type == R_PPC64_ADDR14_BRTAKEN
14158 || r_type == R_PPC64_ADDR14_BRNTAKEN
14159 || (relocation + addend - from + max_br_offset
14160 < 2 * max_br_offset)))
14161 /* Don't use the stub if this branch is in range. */
14162 stub_entry = NULL;
14163
14164 if (stub_entry != NULL)
14165 {
14166 /* Munge up the value and addend so that we call the stub
14167 rather than the procedure directly. */
14168 asection *stub_sec = stub_entry->group->stub_sec;
14169
14170 if (stub_entry->stub_type == ppc_stub_save_res)
14171 relocation += (stub_sec->output_offset
14172 + stub_sec->output_section->vma
14173 + stub_sec->size - htab->sfpr->size
14174 - htab->sfpr->output_offset
14175 - htab->sfpr->output_section->vma);
14176 else
14177 relocation = (stub_entry->stub_offset
14178 + stub_sec->output_offset
14179 + stub_sec->output_section->vma);
14180 addend = 0;
14181 reloc_dest = DEST_STUB;
14182
14183 if ((stub_entry->stub_type == ppc_stub_plt_call
14184 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14185 && (ALWAYS_EMIT_R2SAVE
14186 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14187 && rel + 1 < relend
14188 && rel[1].r_offset == rel->r_offset + 4
14189 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOCSAVE)
14190 relocation += 4;
14191 }
14192
14193 if (insn != 0)
14194 {
14195 if (is_isa_v2)
14196 {
14197 /* Set 'a' bit. This is 0b00010 in BO field for branch
14198 on CR(BI) insns (BO == 001at or 011at), and 0b01000
14199 for branch on CTR insns (BO == 1a00t or 1a01t). */
14200 if ((insn & (0x14 << 21)) == (0x04 << 21))
14201 insn |= 0x02 << 21;
14202 else if ((insn & (0x14 << 21)) == (0x10 << 21))
14203 insn |= 0x08 << 21;
14204 else
14205 break;
14206 }
14207 else
14208 {
14209 /* Invert 'y' bit if not the default. */
14210 if ((bfd_signed_vma) (relocation + addend - from) < 0)
14211 insn ^= 0x01 << 21;
14212 }
14213
14214 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
14215 }
14216
14217 /* NOP out calls to undefined weak functions.
14218 We can thus call a weak function without first
14219 checking whether the function is defined. */
14220 else if (h != NULL
14221 && h->elf.root.type == bfd_link_hash_undefweak
14222 && h->elf.dynindx == -1
14223 && r_type == R_PPC64_REL24
14224 && relocation == 0
14225 && addend == 0)
14226 {
14227 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
14228 goto copy_reloc;
14229 }
14230 break;
14231 }
14232
14233 /* Set `addend'. */
14234 tls_type = 0;
14235 switch (r_type)
14236 {
14237 default:
14238 info->callbacks->einfo
14239 (_("%P: %B: unknown relocation type %d for `%T'\n"),
14240 input_bfd, (int) r_type, sym_name);
14241
14242 bfd_set_error (bfd_error_bad_value);
14243 ret = FALSE;
14244 goto copy_reloc;
14245
14246 case R_PPC64_NONE:
14247 case R_PPC64_TLS:
14248 case R_PPC64_TLSGD:
14249 case R_PPC64_TLSLD:
14250 case R_PPC64_TOCSAVE:
14251 case R_PPC64_GNU_VTINHERIT:
14252 case R_PPC64_GNU_VTENTRY:
14253 case R_PPC64_ENTRY:
14254 goto copy_reloc;
14255
14256 /* GOT16 relocations. Like an ADDR16 using the symbol's
14257 address in the GOT as relocation value instead of the
14258 symbol's value itself. Also, create a GOT entry for the
14259 symbol and put the symbol value there. */
14260 case R_PPC64_GOT_TLSGD16:
14261 case R_PPC64_GOT_TLSGD16_LO:
14262 case R_PPC64_GOT_TLSGD16_HI:
14263 case R_PPC64_GOT_TLSGD16_HA:
14264 tls_type = TLS_TLS | TLS_GD;
14265 goto dogot;
14266
14267 case R_PPC64_GOT_TLSLD16:
14268 case R_PPC64_GOT_TLSLD16_LO:
14269 case R_PPC64_GOT_TLSLD16_HI:
14270 case R_PPC64_GOT_TLSLD16_HA:
14271 tls_type = TLS_TLS | TLS_LD;
14272 goto dogot;
14273
14274 case R_PPC64_GOT_TPREL16_DS:
14275 case R_PPC64_GOT_TPREL16_LO_DS:
14276 case R_PPC64_GOT_TPREL16_HI:
14277 case R_PPC64_GOT_TPREL16_HA:
14278 tls_type = TLS_TLS | TLS_TPREL;
14279 goto dogot;
14280
14281 case R_PPC64_GOT_DTPREL16_DS:
14282 case R_PPC64_GOT_DTPREL16_LO_DS:
14283 case R_PPC64_GOT_DTPREL16_HI:
14284 case R_PPC64_GOT_DTPREL16_HA:
14285 tls_type = TLS_TLS | TLS_DTPREL;
14286 goto dogot;
14287
14288 case R_PPC64_GOT16:
14289 case R_PPC64_GOT16_LO:
14290 case R_PPC64_GOT16_HI:
14291 case R_PPC64_GOT16_HA:
14292 case R_PPC64_GOT16_DS:
14293 case R_PPC64_GOT16_LO_DS:
14294 dogot:
14295 {
14296 /* Relocation is to the entry for this symbol in the global
14297 offset table. */
14298 asection *got;
14299 bfd_vma *offp;
14300 bfd_vma off;
14301 unsigned long indx = 0;
14302 struct got_entry *ent;
14303
14304 if (tls_type == (TLS_TLS | TLS_LD)
14305 && (h == NULL
14306 || !h->elf.def_dynamic))
14307 ent = ppc64_tlsld_got (input_bfd);
14308 else
14309 {
14310
14311 if (h != NULL)
14312 {
14313 bfd_boolean dyn = htab->elf.dynamic_sections_created;
14314 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, bfd_link_pic (info),
14315 &h->elf)
14316 || (bfd_link_pic (info)
14317 && SYMBOL_REFERENCES_LOCAL (info, &h->elf)))
14318 /* This is actually a static link, or it is a
14319 -Bsymbolic link and the symbol is defined
14320 locally, or the symbol was forced to be local
14321 because of a version file. */
14322 ;
14323 else
14324 {
14325 BFD_ASSERT (h->elf.dynindx != -1);
14326 indx = h->elf.dynindx;
14327 unresolved_reloc = FALSE;
14328 }
14329 ent = h->elf.got.glist;
14330 }
14331 else
14332 {
14333 if (local_got_ents == NULL)
14334 abort ();
14335 ent = local_got_ents[r_symndx];
14336 }
14337
14338 for (; ent != NULL; ent = ent->next)
14339 if (ent->addend == orig_rel.r_addend
14340 && ent->owner == input_bfd
14341 && ent->tls_type == tls_type)
14342 break;
14343 }
14344
14345 if (ent == NULL)
14346 abort ();
14347 if (ent->is_indirect)
14348 ent = ent->got.ent;
14349 offp = &ent->got.offset;
14350 got = ppc64_elf_tdata (ent->owner)->got;
14351 if (got == NULL)
14352 abort ();
14353
14354 /* The offset must always be a multiple of 8. We use the
14355 least significant bit to record whether we have already
14356 processed this entry. */
14357 off = *offp;
14358 if ((off & 1) != 0)
14359 off &= ~1;
14360 else
14361 {
14362 /* Generate relocs for the dynamic linker, except in
14363 the case of TLSLD where we'll use one entry per
14364 module. */
14365 asection *relgot;
14366 bfd_boolean ifunc;
14367
14368 *offp = off | 1;
14369 relgot = NULL;
14370 ifunc = (h != NULL
14371 ? h->elf.type == STT_GNU_IFUNC
14372 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC);
14373 if (ifunc)
14374 relgot = htab->elf.irelplt;
14375 else if ((bfd_link_pic (info) || indx != 0)
14376 && (h == NULL
14377 || (tls_type == (TLS_TLS | TLS_LD)
14378 && !h->elf.def_dynamic)
14379 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
14380 || h->elf.root.type != bfd_link_hash_undefweak))
14381 relgot = ppc64_elf_tdata (ent->owner)->relgot;
14382 if (relgot != NULL)
14383 {
14384 outrel.r_offset = (got->output_section->vma
14385 + got->output_offset
14386 + off);
14387 outrel.r_addend = addend;
14388 if (tls_type & (TLS_LD | TLS_GD))
14389 {
14390 outrel.r_addend = 0;
14391 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
14392 if (tls_type == (TLS_TLS | TLS_GD))
14393 {
14394 loc = relgot->contents;
14395 loc += (relgot->reloc_count++
14396 * sizeof (Elf64_External_Rela));
14397 bfd_elf64_swap_reloca_out (output_bfd,
14398 &outrel, loc);
14399 outrel.r_offset += 8;
14400 outrel.r_addend = addend;
14401 outrel.r_info
14402 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
14403 }
14404 }
14405 else if (tls_type == (TLS_TLS | TLS_DTPREL))
14406 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
14407 else if (tls_type == (TLS_TLS | TLS_TPREL))
14408 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
14409 else if (indx != 0)
14410 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
14411 else
14412 {
14413 if (ifunc)
14414 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
14415 else
14416 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
14417
14418 /* Write the .got section contents for the sake
14419 of prelink. */
14420 loc = got->contents + off;
14421 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
14422 loc);
14423 }
14424
14425 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
14426 {
14427 outrel.r_addend += relocation;
14428 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
14429 {
14430 if (htab->elf.tls_sec == NULL)
14431 outrel.r_addend = 0;
14432 else
14433 outrel.r_addend -= htab->elf.tls_sec->vma;
14434 }
14435 }
14436 loc = relgot->contents;
14437 loc += (relgot->reloc_count++
14438 * sizeof (Elf64_External_Rela));
14439 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
14440 }
14441
14442 /* Init the .got section contents here if we're not
14443 emitting a reloc. */
14444 else
14445 {
14446 relocation += addend;
14447 if (tls_type == (TLS_TLS | TLS_LD))
14448 relocation = 1;
14449 else if (tls_type != 0)
14450 {
14451 if (htab->elf.tls_sec == NULL)
14452 relocation = 0;
14453 else
14454 {
14455 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
14456 if (tls_type == (TLS_TLS | TLS_TPREL))
14457 relocation += DTP_OFFSET - TP_OFFSET;
14458 }
14459
14460 if (tls_type == (TLS_TLS | TLS_GD))
14461 {
14462 bfd_put_64 (output_bfd, relocation,
14463 got->contents + off + 8);
14464 relocation = 1;
14465 }
14466 }
14467
14468 bfd_put_64 (output_bfd, relocation,
14469 got->contents + off);
14470 }
14471 }
14472
14473 if (off >= (bfd_vma) -2)
14474 abort ();
14475
14476 relocation = got->output_section->vma + got->output_offset + off;
14477 addend = -(TOCstart + htab->sec_info[input_section->id].toc_off);
14478 }
14479 break;
14480
14481 case R_PPC64_PLT16_HA:
14482 case R_PPC64_PLT16_HI:
14483 case R_PPC64_PLT16_LO:
14484 case R_PPC64_PLT32:
14485 case R_PPC64_PLT64:
14486 /* Relocation is to the entry for this symbol in the
14487 procedure linkage table. */
14488
14489 /* Resolve a PLT reloc against a local symbol directly,
14490 without using the procedure linkage table. */
14491 if (h == NULL)
14492 break;
14493
14494 /* It's possible that we didn't make a PLT entry for this
14495 symbol. This happens when statically linking PIC code,
14496 or when using -Bsymbolic. Go find a match if there is a
14497 PLT entry. */
14498 if (htab->elf.splt != NULL)
14499 {
14500 struct plt_entry *ent;
14501 for (ent = h->elf.plt.plist; ent != NULL; ent = ent->next)
14502 if (ent->plt.offset != (bfd_vma) -1
14503 && ent->addend == orig_rel.r_addend)
14504 {
14505 relocation = (htab->elf.splt->output_section->vma
14506 + htab->elf.splt->output_offset
14507 + ent->plt.offset);
14508 unresolved_reloc = FALSE;
14509 break;
14510 }
14511 }
14512 break;
14513
14514 case R_PPC64_TOC:
14515 /* Relocation value is TOC base. */
14516 relocation = TOCstart;
14517 if (r_symndx == STN_UNDEF)
14518 relocation += htab->sec_info[input_section->id].toc_off;
14519 else if (unresolved_reloc)
14520 ;
14521 else if (sec != NULL && sec->id < htab->sec_info_arr_size)
14522 relocation += htab->sec_info[sec->id].toc_off;
14523 else
14524 unresolved_reloc = TRUE;
14525 goto dodyn;
14526
14527 /* TOC16 relocs. We want the offset relative to the TOC base,
14528 which is the address of the start of the TOC plus 0x8000.
14529 The TOC consists of sections .got, .toc, .tocbss, and .plt,
14530 in this order. */
14531 case R_PPC64_TOC16:
14532 case R_PPC64_TOC16_LO:
14533 case R_PPC64_TOC16_HI:
14534 case R_PPC64_TOC16_DS:
14535 case R_PPC64_TOC16_LO_DS:
14536 case R_PPC64_TOC16_HA:
14537 addend -= TOCstart + htab->sec_info[input_section->id].toc_off;
14538 break;
14539
14540 /* Relocate against the beginning of the section. */
14541 case R_PPC64_SECTOFF:
14542 case R_PPC64_SECTOFF_LO:
14543 case R_PPC64_SECTOFF_HI:
14544 case R_PPC64_SECTOFF_DS:
14545 case R_PPC64_SECTOFF_LO_DS:
14546 case R_PPC64_SECTOFF_HA:
14547 if (sec != NULL)
14548 addend -= sec->output_section->vma;
14549 break;
14550
14551 case R_PPC64_REL16:
14552 case R_PPC64_REL16_LO:
14553 case R_PPC64_REL16_HI:
14554 case R_PPC64_REL16_HA:
14555 case R_PPC64_REL16DX_HA:
14556 break;
14557
14558 case R_PPC64_REL14:
14559 case R_PPC64_REL14_BRNTAKEN:
14560 case R_PPC64_REL14_BRTAKEN:
14561 case R_PPC64_REL24:
14562 break;
14563
14564 case R_PPC64_TPREL16:
14565 case R_PPC64_TPREL16_LO:
14566 case R_PPC64_TPREL16_HI:
14567 case R_PPC64_TPREL16_HA:
14568 case R_PPC64_TPREL16_DS:
14569 case R_PPC64_TPREL16_LO_DS:
14570 case R_PPC64_TPREL16_HIGH:
14571 case R_PPC64_TPREL16_HIGHA:
14572 case R_PPC64_TPREL16_HIGHER:
14573 case R_PPC64_TPREL16_HIGHERA:
14574 case R_PPC64_TPREL16_HIGHEST:
14575 case R_PPC64_TPREL16_HIGHESTA:
14576 if (h != NULL
14577 && h->elf.root.type == bfd_link_hash_undefweak
14578 && h->elf.dynindx == -1)
14579 {
14580 /* Make this relocation against an undefined weak symbol
14581 resolve to zero. This is really just a tweak, since
14582 code using weak externs ought to check that they are
14583 defined before using them. */
14584 bfd_byte *p = contents + rel->r_offset - d_offset;
14585
14586 insn = bfd_get_32 (output_bfd, p);
14587 insn = _bfd_elf_ppc_at_tprel_transform (insn, 13);
14588 if (insn != 0)
14589 bfd_put_32 (output_bfd, insn, p);
14590 break;
14591 }
14592 if (htab->elf.tls_sec != NULL)
14593 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
14594 if (bfd_link_pic (info))
14595 /* The TPREL16 relocs shouldn't really be used in shared
14596 libs as they will result in DT_TEXTREL being set, but
14597 support them anyway. */
14598 goto dodyn;
14599 break;
14600
14601 case R_PPC64_DTPREL16:
14602 case R_PPC64_DTPREL16_LO:
14603 case R_PPC64_DTPREL16_HI:
14604 case R_PPC64_DTPREL16_HA:
14605 case R_PPC64_DTPREL16_DS:
14606 case R_PPC64_DTPREL16_LO_DS:
14607 case R_PPC64_DTPREL16_HIGH:
14608 case R_PPC64_DTPREL16_HIGHA:
14609 case R_PPC64_DTPREL16_HIGHER:
14610 case R_PPC64_DTPREL16_HIGHERA:
14611 case R_PPC64_DTPREL16_HIGHEST:
14612 case R_PPC64_DTPREL16_HIGHESTA:
14613 if (htab->elf.tls_sec != NULL)
14614 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
14615 break;
14616
14617 case R_PPC64_ADDR64_LOCAL:
14618 addend += PPC64_LOCAL_ENTRY_OFFSET (h != NULL
14619 ? h->elf.other
14620 : sym->st_other);
14621 break;
14622
14623 case R_PPC64_DTPMOD64:
14624 relocation = 1;
14625 addend = 0;
14626 goto dodyn;
14627
14628 case R_PPC64_TPREL64:
14629 if (htab->elf.tls_sec != NULL)
14630 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
14631 goto dodyn;
14632
14633 case R_PPC64_DTPREL64:
14634 if (htab->elf.tls_sec != NULL)
14635 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
14636 /* Fall thru */
14637
14638 /* Relocations that may need to be propagated if this is a
14639 dynamic object. */
14640 case R_PPC64_REL30:
14641 case R_PPC64_REL32:
14642 case R_PPC64_REL64:
14643 case R_PPC64_ADDR14:
14644 case R_PPC64_ADDR14_BRNTAKEN:
14645 case R_PPC64_ADDR14_BRTAKEN:
14646 case R_PPC64_ADDR16:
14647 case R_PPC64_ADDR16_DS:
14648 case R_PPC64_ADDR16_HA:
14649 case R_PPC64_ADDR16_HI:
14650 case R_PPC64_ADDR16_HIGH:
14651 case R_PPC64_ADDR16_HIGHA:
14652 case R_PPC64_ADDR16_HIGHER:
14653 case R_PPC64_ADDR16_HIGHERA:
14654 case R_PPC64_ADDR16_HIGHEST:
14655 case R_PPC64_ADDR16_HIGHESTA:
14656 case R_PPC64_ADDR16_LO:
14657 case R_PPC64_ADDR16_LO_DS:
14658 case R_PPC64_ADDR24:
14659 case R_PPC64_ADDR32:
14660 case R_PPC64_ADDR64:
14661 case R_PPC64_UADDR16:
14662 case R_PPC64_UADDR32:
14663 case R_PPC64_UADDR64:
14664 dodyn:
14665 if ((input_section->flags & SEC_ALLOC) == 0)
14666 break;
14667
14668 if (NO_OPD_RELOCS && is_opd)
14669 break;
14670
14671 if ((bfd_link_pic (info)
14672 && (h == NULL
14673 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
14674 || h->elf.root.type != bfd_link_hash_undefweak)
14675 && (must_be_dyn_reloc (info, r_type)
14676 || !SYMBOL_CALLS_LOCAL (info, &h->elf)))
14677 || (ELIMINATE_COPY_RELOCS
14678 && !bfd_link_pic (info)
14679 && h != NULL
14680 && h->elf.dynindx != -1
14681 && !h->elf.non_got_ref
14682 && !h->elf.def_regular)
14683 || (!bfd_link_pic (info)
14684 && (h != NULL
14685 ? h->elf.type == STT_GNU_IFUNC
14686 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)))
14687 {
14688 bfd_boolean skip, relocate;
14689 asection *sreloc;
14690 bfd_vma out_off;
14691
14692 /* When generating a dynamic object, these relocations
14693 are copied into the output file to be resolved at run
14694 time. */
14695
14696 skip = FALSE;
14697 relocate = FALSE;
14698
14699 out_off = _bfd_elf_section_offset (output_bfd, info,
14700 input_section, rel->r_offset);
14701 if (out_off == (bfd_vma) -1)
14702 skip = TRUE;
14703 else if (out_off == (bfd_vma) -2)
14704 skip = TRUE, relocate = TRUE;
14705 out_off += (input_section->output_section->vma
14706 + input_section->output_offset);
14707 outrel.r_offset = out_off;
14708 outrel.r_addend = rel->r_addend;
14709
14710 /* Optimize unaligned reloc use. */
14711 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
14712 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
14713 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
14714 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
14715 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
14716 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
14717 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
14718 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
14719 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
14720
14721 if (skip)
14722 memset (&outrel, 0, sizeof outrel);
14723 else if (!SYMBOL_REFERENCES_LOCAL (info, &h->elf)
14724 && !is_opd
14725 && r_type != R_PPC64_TOC)
14726 {
14727 BFD_ASSERT (h->elf.dynindx != -1);
14728 outrel.r_info = ELF64_R_INFO (h->elf.dynindx, r_type);
14729 }
14730 else
14731 {
14732 /* This symbol is local, or marked to become local,
14733 or this is an opd section reloc which must point
14734 at a local function. */
14735 outrel.r_addend += relocation;
14736 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
14737 {
14738 if (is_opd && h != NULL)
14739 {
14740 /* Lie about opd entries. This case occurs
14741 when building shared libraries and we
14742 reference a function in another shared
14743 lib. The same thing happens for a weak
14744 definition in an application that's
14745 overridden by a strong definition in a
14746 shared lib. (I believe this is a generic
14747 bug in binutils handling of weak syms.)
14748 In these cases we won't use the opd
14749 entry in this lib. */
14750 unresolved_reloc = FALSE;
14751 }
14752 if (!is_opd
14753 && r_type == R_PPC64_ADDR64
14754 && (h != NULL
14755 ? h->elf.type == STT_GNU_IFUNC
14756 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
14757 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
14758 else
14759 {
14760 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
14761
14762 /* We need to relocate .opd contents for ld.so.
14763 Prelink also wants simple and consistent rules
14764 for relocs. This make all RELATIVE relocs have
14765 *r_offset equal to r_addend. */
14766 relocate = TRUE;
14767 }
14768 }
14769 else
14770 {
14771 long indx = 0;
14772
14773 if (h != NULL
14774 ? h->elf.type == STT_GNU_IFUNC
14775 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
14776 {
14777 info->callbacks->einfo
14778 (_("%P: %H: %s for indirect "
14779 "function `%T' unsupported\n"),
14780 input_bfd, input_section, rel->r_offset,
14781 ppc64_elf_howto_table[r_type]->name,
14782 sym_name);
14783 ret = FALSE;
14784 }
14785 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
14786 ;
14787 else if (sec == NULL || sec->owner == NULL)
14788 {
14789 bfd_set_error (bfd_error_bad_value);
14790 return FALSE;
14791 }
14792 else
14793 {
14794 asection *osec;
14795
14796 osec = sec->output_section;
14797 indx = elf_section_data (osec)->dynindx;
14798
14799 if (indx == 0)
14800 {
14801 if ((osec->flags & SEC_READONLY) == 0
14802 && htab->elf.data_index_section != NULL)
14803 osec = htab->elf.data_index_section;
14804 else
14805 osec = htab->elf.text_index_section;
14806 indx = elf_section_data (osec)->dynindx;
14807 }
14808 BFD_ASSERT (indx != 0);
14809
14810 /* We are turning this relocation into one
14811 against a section symbol, so subtract out
14812 the output section's address but not the
14813 offset of the input section in the output
14814 section. */
14815 outrel.r_addend -= osec->vma;
14816 }
14817
14818 outrel.r_info = ELF64_R_INFO (indx, r_type);
14819 }
14820 }
14821
14822 sreloc = elf_section_data (input_section)->sreloc;
14823 if (h != NULL
14824 ? h->elf.type == STT_GNU_IFUNC
14825 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
14826 sreloc = htab->elf.irelplt;
14827 if (sreloc == NULL)
14828 abort ();
14829
14830 if (sreloc->reloc_count * sizeof (Elf64_External_Rela)
14831 >= sreloc->size)
14832 abort ();
14833 loc = sreloc->contents;
14834 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
14835 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
14836
14837 /* If this reloc is against an external symbol, it will
14838 be computed at runtime, so there's no need to do
14839 anything now. However, for the sake of prelink ensure
14840 that the section contents are a known value. */
14841 if (! relocate)
14842 {
14843 unresolved_reloc = FALSE;
14844 /* The value chosen here is quite arbitrary as ld.so
14845 ignores section contents except for the special
14846 case of .opd where the contents might be accessed
14847 before relocation. Choose zero, as that won't
14848 cause reloc overflow. */
14849 relocation = 0;
14850 addend = 0;
14851 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
14852 to improve backward compatibility with older
14853 versions of ld. */
14854 if (r_type == R_PPC64_ADDR64)
14855 addend = outrel.r_addend;
14856 /* Adjust pc_relative relocs to have zero in *r_offset. */
14857 else if (ppc64_elf_howto_table[r_type]->pc_relative)
14858 addend = (input_section->output_section->vma
14859 + input_section->output_offset
14860 + rel->r_offset);
14861 }
14862 }
14863 break;
14864
14865 case R_PPC64_COPY:
14866 case R_PPC64_GLOB_DAT:
14867 case R_PPC64_JMP_SLOT:
14868 case R_PPC64_JMP_IREL:
14869 case R_PPC64_RELATIVE:
14870 /* We shouldn't ever see these dynamic relocs in relocatable
14871 files. */
14872 /* Fall through. */
14873
14874 case R_PPC64_PLTGOT16:
14875 case R_PPC64_PLTGOT16_DS:
14876 case R_PPC64_PLTGOT16_HA:
14877 case R_PPC64_PLTGOT16_HI:
14878 case R_PPC64_PLTGOT16_LO:
14879 case R_PPC64_PLTGOT16_LO_DS:
14880 case R_PPC64_PLTREL32:
14881 case R_PPC64_PLTREL64:
14882 /* These ones haven't been implemented yet. */
14883
14884 info->callbacks->einfo
14885 (_("%P: %B: %s is not supported for `%T'\n"),
14886 input_bfd,
14887 ppc64_elf_howto_table[r_type]->name, sym_name);
14888
14889 bfd_set_error (bfd_error_invalid_operation);
14890 ret = FALSE;
14891 goto copy_reloc;
14892 }
14893
14894 /* Multi-instruction sequences that access the TOC can be
14895 optimized, eg. addis ra,r2,0; addi rb,ra,x;
14896 to nop; addi rb,r2,x; */
14897 switch (r_type)
14898 {
14899 default:
14900 break;
14901
14902 case R_PPC64_GOT_TLSLD16_HI:
14903 case R_PPC64_GOT_TLSGD16_HI:
14904 case R_PPC64_GOT_TPREL16_HI:
14905 case R_PPC64_GOT_DTPREL16_HI:
14906 case R_PPC64_GOT16_HI:
14907 case R_PPC64_TOC16_HI:
14908 /* These relocs would only be useful if building up an
14909 offset to later add to r2, perhaps in an indexed
14910 addressing mode instruction. Don't try to optimize.
14911 Unfortunately, the possibility of someone building up an
14912 offset like this or even with the HA relocs, means that
14913 we need to check the high insn when optimizing the low
14914 insn. */
14915 break;
14916
14917 case R_PPC64_GOT_TLSLD16_HA:
14918 case R_PPC64_GOT_TLSGD16_HA:
14919 case R_PPC64_GOT_TPREL16_HA:
14920 case R_PPC64_GOT_DTPREL16_HA:
14921 case R_PPC64_GOT16_HA:
14922 case R_PPC64_TOC16_HA:
14923 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
14924 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
14925 {
14926 bfd_byte *p = contents + (rel->r_offset & ~3);
14927 bfd_put_32 (input_bfd, NOP, p);
14928 }
14929 break;
14930
14931 case R_PPC64_GOT_TLSLD16_LO:
14932 case R_PPC64_GOT_TLSGD16_LO:
14933 case R_PPC64_GOT_TPREL16_LO_DS:
14934 case R_PPC64_GOT_DTPREL16_LO_DS:
14935 case R_PPC64_GOT16_LO:
14936 case R_PPC64_GOT16_LO_DS:
14937 case R_PPC64_TOC16_LO:
14938 case R_PPC64_TOC16_LO_DS:
14939 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
14940 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
14941 {
14942 bfd_byte *p = contents + (rel->r_offset & ~3);
14943 insn = bfd_get_32 (input_bfd, p);
14944 if ((insn & (0x3f << 26)) == 12u << 26 /* addic */)
14945 {
14946 /* Transform addic to addi when we change reg. */
14947 insn &= ~((0x3f << 26) | (0x1f << 16));
14948 insn |= (14u << 26) | (2 << 16);
14949 }
14950 else
14951 {
14952 insn &= ~(0x1f << 16);
14953 insn |= 2 << 16;
14954 }
14955 bfd_put_32 (input_bfd, insn, p);
14956 }
14957 break;
14958 }
14959
14960 /* Do any further special processing. */
14961 howto = ppc64_elf_howto_table[(int) r_type];
14962 switch (r_type)
14963 {
14964 default:
14965 break;
14966
14967 case R_PPC64_REL16_HA:
14968 case R_PPC64_REL16DX_HA:
14969 case R_PPC64_ADDR16_HA:
14970 case R_PPC64_ADDR16_HIGHA:
14971 case R_PPC64_ADDR16_HIGHERA:
14972 case R_PPC64_ADDR16_HIGHESTA:
14973 case R_PPC64_TOC16_HA:
14974 case R_PPC64_SECTOFF_HA:
14975 case R_PPC64_TPREL16_HA:
14976 case R_PPC64_TPREL16_HIGHA:
14977 case R_PPC64_TPREL16_HIGHERA:
14978 case R_PPC64_TPREL16_HIGHESTA:
14979 case R_PPC64_DTPREL16_HA:
14980 case R_PPC64_DTPREL16_HIGHA:
14981 case R_PPC64_DTPREL16_HIGHERA:
14982 case R_PPC64_DTPREL16_HIGHESTA:
14983 /* It's just possible that this symbol is a weak symbol
14984 that's not actually defined anywhere. In that case,
14985 'sec' would be NULL, and we should leave the symbol
14986 alone (it will be set to zero elsewhere in the link). */
14987 if (sec == NULL)
14988 break;
14989 /* Fall thru */
14990
14991 case R_PPC64_GOT16_HA:
14992 case R_PPC64_PLTGOT16_HA:
14993 case R_PPC64_PLT16_HA:
14994 case R_PPC64_GOT_TLSGD16_HA:
14995 case R_PPC64_GOT_TLSLD16_HA:
14996 case R_PPC64_GOT_TPREL16_HA:
14997 case R_PPC64_GOT_DTPREL16_HA:
14998 /* Add 0x10000 if sign bit in 0:15 is set.
14999 Bits 0:15 are not used. */
15000 addend += 0x8000;
15001 break;
15002
15003 case R_PPC64_ADDR16_DS:
15004 case R_PPC64_ADDR16_LO_DS:
15005 case R_PPC64_GOT16_DS:
15006 case R_PPC64_GOT16_LO_DS:
15007 case R_PPC64_PLT16_LO_DS:
15008 case R_PPC64_SECTOFF_DS:
15009 case R_PPC64_SECTOFF_LO_DS:
15010 case R_PPC64_TOC16_DS:
15011 case R_PPC64_TOC16_LO_DS:
15012 case R_PPC64_PLTGOT16_DS:
15013 case R_PPC64_PLTGOT16_LO_DS:
15014 case R_PPC64_GOT_TPREL16_DS:
15015 case R_PPC64_GOT_TPREL16_LO_DS:
15016 case R_PPC64_GOT_DTPREL16_DS:
15017 case R_PPC64_GOT_DTPREL16_LO_DS:
15018 case R_PPC64_TPREL16_DS:
15019 case R_PPC64_TPREL16_LO_DS:
15020 case R_PPC64_DTPREL16_DS:
15021 case R_PPC64_DTPREL16_LO_DS:
15022 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
15023 mask = 3;
15024 /* If this reloc is against an lq, lxv, or stxv insn, then
15025 the value must be a multiple of 16. This is somewhat of
15026 a hack, but the "correct" way to do this by defining _DQ
15027 forms of all the _DS relocs bloats all reloc switches in
15028 this file. It doesn't make much sense to use these
15029 relocs in data, so testing the insn should be safe. */
15030 if ((insn & (0x3f << 26)) == (56u << 26)
15031 || ((insn & (0x3f << 26)) == (61u << 26) && (insn & 3) == 1))
15032 mask = 15;
15033 relocation += addend;
15034 addend = insn & (mask ^ 3);
15035 if ((relocation & mask) != 0)
15036 {
15037 relocation ^= relocation & mask;
15038 info->callbacks->einfo
15039 (_("%P: %H: error: %s not a multiple of %u\n"),
15040 input_bfd, input_section, rel->r_offset,
15041 howto->name,
15042 mask + 1);
15043 bfd_set_error (bfd_error_bad_value);
15044 ret = FALSE;
15045 goto copy_reloc;
15046 }
15047 break;
15048 }
15049
15050 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
15051 because such sections are not SEC_ALLOC and thus ld.so will
15052 not process them. */
15053 if (unresolved_reloc
15054 && !((input_section->flags & SEC_DEBUGGING) != 0
15055 && h->elf.def_dynamic)
15056 && _bfd_elf_section_offset (output_bfd, info, input_section,
15057 rel->r_offset) != (bfd_vma) -1)
15058 {
15059 info->callbacks->einfo
15060 (_("%P: %H: unresolvable %s against `%T'\n"),
15061 input_bfd, input_section, rel->r_offset,
15062 howto->name,
15063 h->elf.root.root.string);
15064 ret = FALSE;
15065 }
15066
15067 /* 16-bit fields in insns mostly have signed values, but a
15068 few insns have 16-bit unsigned values. Really, we should
15069 have different reloc types. */
15070 if (howto->complain_on_overflow != complain_overflow_dont
15071 && howto->dst_mask == 0xffff
15072 && (input_section->flags & SEC_CODE) != 0)
15073 {
15074 enum complain_overflow complain = complain_overflow_signed;
15075
15076 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
15077 if ((insn & (0x3f << 26)) == 10u << 26 /* cmpli */)
15078 complain = complain_overflow_bitfield;
15079 else if (howto->rightshift == 0
15080 ? ((insn & (0x3f << 26)) == 28u << 26 /* andi */
15081 || (insn & (0x3f << 26)) == 24u << 26 /* ori */
15082 || (insn & (0x3f << 26)) == 26u << 26 /* xori */)
15083 : ((insn & (0x3f << 26)) == 29u << 26 /* andis */
15084 || (insn & (0x3f << 26)) == 25u << 26 /* oris */
15085 || (insn & (0x3f << 26)) == 27u << 26 /* xoris */))
15086 complain = complain_overflow_unsigned;
15087 if (howto->complain_on_overflow != complain)
15088 {
15089 alt_howto = *howto;
15090 alt_howto.complain_on_overflow = complain;
15091 howto = &alt_howto;
15092 }
15093 }
15094
15095 if (r_type == R_PPC64_REL16DX_HA)
15096 {
15097 /* Split field reloc isn't handled by _bfd_final_link_relocate. */
15098 if (rel->r_offset + 4 > input_section->size)
15099 r = bfd_reloc_outofrange;
15100 else
15101 {
15102 relocation += addend;
15103 relocation -= (rel->r_offset
15104 + input_section->output_offset
15105 + input_section->output_section->vma);
15106 relocation = (bfd_signed_vma) relocation >> 16;
15107 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
15108 insn &= ~0x1fffc1;
15109 insn |= (relocation & 0xffc1) | ((relocation & 0x3e) << 15);
15110 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
15111 r = bfd_reloc_ok;
15112 if (relocation + 0x8000 > 0xffff)
15113 r = bfd_reloc_overflow;
15114 }
15115 }
15116 else
15117 r = _bfd_final_link_relocate (howto, input_bfd, input_section, contents,
15118 rel->r_offset, relocation, addend);
15119
15120 if (r != bfd_reloc_ok)
15121 {
15122 char *more_info = NULL;
15123 const char *reloc_name = howto->name;
15124
15125 if (reloc_dest != DEST_NORMAL)
15126 {
15127 more_info = bfd_malloc (strlen (reloc_name) + 8);
15128 if (more_info != NULL)
15129 {
15130 strcpy (more_info, reloc_name);
15131 strcat (more_info, (reloc_dest == DEST_OPD
15132 ? " (OPD)" : " (stub)"));
15133 reloc_name = more_info;
15134 }
15135 }
15136
15137 if (r == bfd_reloc_overflow)
15138 {
15139 /* On code like "if (foo) foo();" don't report overflow
15140 on a branch to zero when foo is undefined. */
15141 if (!warned
15142 && (reloc_dest == DEST_STUB
15143 || !(h != NULL
15144 && (h->elf.root.type == bfd_link_hash_undefweak
15145 || h->elf.root.type == bfd_link_hash_undefined)
15146 && is_branch_reloc (r_type))))
15147 {
15148 if (!((*info->callbacks->reloc_overflow)
15149 (info, &h->elf.root, sym_name,
15150 reloc_name, orig_rel.r_addend,
15151 input_bfd, input_section, rel->r_offset)))
15152 return FALSE;
15153 }
15154 }
15155 else
15156 {
15157 info->callbacks->einfo
15158 (_("%P: %H: %s against `%T': error %d\n"),
15159 input_bfd, input_section, rel->r_offset,
15160 reloc_name, sym_name, (int) r);
15161 ret = FALSE;
15162 }
15163 if (more_info != NULL)
15164 free (more_info);
15165 }
15166 copy_reloc:
15167 if (wrel != rel)
15168 *wrel = *rel;
15169 }
15170
15171 if (wrel != rel)
15172 {
15173 Elf_Internal_Shdr *rel_hdr;
15174 size_t deleted = rel - wrel;
15175
15176 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
15177 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
15178 if (rel_hdr->sh_size == 0)
15179 {
15180 /* It is too late to remove an empty reloc section. Leave
15181 one NONE reloc.
15182 ??? What is wrong with an empty section??? */
15183 rel_hdr->sh_size = rel_hdr->sh_entsize;
15184 deleted -= 1;
15185 }
15186 rel_hdr = _bfd_elf_single_rel_hdr (input_section);
15187 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
15188 input_section->reloc_count -= deleted;
15189 }
15190
15191 /* If we're emitting relocations, then shortly after this function
15192 returns, reloc offsets and addends for this section will be
15193 adjusted. Worse, reloc symbol indices will be for the output
15194 file rather than the input. Save a copy of the relocs for
15195 opd_entry_value. */
15196 if (is_opd && (info->emitrelocations || bfd_link_relocatable (info)))
15197 {
15198 bfd_size_type amt;
15199 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
15200 rel = bfd_alloc (input_bfd, amt);
15201 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd.relocs == NULL);
15202 ppc64_elf_tdata (input_bfd)->opd.relocs = rel;
15203 if (rel == NULL)
15204 return FALSE;
15205 memcpy (rel, relocs, amt);
15206 }
15207 return ret;
15208 }
15209
15210 /* Adjust the value of any local symbols in opd sections. */
15211
15212 static int
15213 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
15214 const char *name ATTRIBUTE_UNUSED,
15215 Elf_Internal_Sym *elfsym,
15216 asection *input_sec,
15217 struct elf_link_hash_entry *h)
15218 {
15219 struct _opd_sec_data *opd;
15220 long adjust;
15221 bfd_vma value;
15222
15223 if (h != NULL)
15224 return 1;
15225
15226 opd = get_opd_info (input_sec);
15227 if (opd == NULL || opd->adjust == NULL)
15228 return 1;
15229
15230 value = elfsym->st_value - input_sec->output_offset;
15231 if (!bfd_link_relocatable (info))
15232 value -= input_sec->output_section->vma;
15233
15234 adjust = opd->adjust[OPD_NDX (value)];
15235 if (adjust == -1)
15236 return 2;
15237
15238 elfsym->st_value += adjust;
15239 return 1;
15240 }
15241
15242 /* Finish up dynamic symbol handling. We set the contents of various
15243 dynamic sections here. */
15244
15245 static bfd_boolean
15246 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
15247 struct bfd_link_info *info,
15248 struct elf_link_hash_entry *h,
15249 Elf_Internal_Sym *sym ATTRIBUTE_UNUSED)
15250 {
15251 struct ppc_link_hash_table *htab;
15252 struct plt_entry *ent;
15253 Elf_Internal_Rela rela;
15254 bfd_byte *loc;
15255
15256 htab = ppc_hash_table (info);
15257 if (htab == NULL)
15258 return FALSE;
15259
15260 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
15261 if (ent->plt.offset != (bfd_vma) -1)
15262 {
15263 /* This symbol has an entry in the procedure linkage
15264 table. Set it up. */
15265 if (!htab->elf.dynamic_sections_created
15266 || h->dynindx == -1)
15267 {
15268 BFD_ASSERT (h->type == STT_GNU_IFUNC
15269 && h->def_regular
15270 && (h->root.type == bfd_link_hash_defined
15271 || h->root.type == bfd_link_hash_defweak));
15272 rela.r_offset = (htab->elf.iplt->output_section->vma
15273 + htab->elf.iplt->output_offset
15274 + ent->plt.offset);
15275 if (htab->opd_abi)
15276 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
15277 else
15278 rela.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
15279 rela.r_addend = (h->root.u.def.value
15280 + h->root.u.def.section->output_offset
15281 + h->root.u.def.section->output_section->vma
15282 + ent->addend);
15283 loc = (htab->elf.irelplt->contents
15284 + (htab->elf.irelplt->reloc_count++
15285 * sizeof (Elf64_External_Rela)));
15286 }
15287 else
15288 {
15289 rela.r_offset = (htab->elf.splt->output_section->vma
15290 + htab->elf.splt->output_offset
15291 + ent->plt.offset);
15292 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
15293 rela.r_addend = ent->addend;
15294 loc = (htab->elf.srelplt->contents
15295 + ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE (htab))
15296 / PLT_ENTRY_SIZE (htab) * sizeof (Elf64_External_Rela)));
15297 }
15298 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
15299
15300 if (!htab->opd_abi)
15301 {
15302 if (!h->def_regular)
15303 {
15304 /* Mark the symbol as undefined, rather than as
15305 defined in glink. Leave the value if there were
15306 any relocations where pointer equality matters
15307 (this is a clue for the dynamic linker, to make
15308 function pointer comparisons work between an
15309 application and shared library), otherwise set it
15310 to zero. */
15311 sym->st_shndx = SHN_UNDEF;
15312 if (!h->pointer_equality_needed)
15313 sym->st_value = 0;
15314 else if (!h->ref_regular_nonweak)
15315 {
15316 /* This breaks function pointer comparisons, but
15317 that is better than breaking tests for a NULL
15318 function pointer. */
15319 sym->st_value = 0;
15320 }
15321 }
15322 }
15323 }
15324
15325 if (h->needs_copy)
15326 {
15327 /* This symbol needs a copy reloc. Set it up. */
15328
15329 if (h->dynindx == -1
15330 || (h->root.type != bfd_link_hash_defined
15331 && h->root.type != bfd_link_hash_defweak)
15332 || htab->relbss == NULL)
15333 abort ();
15334
15335 rela.r_offset = (h->root.u.def.value
15336 + h->root.u.def.section->output_section->vma
15337 + h->root.u.def.section->output_offset);
15338 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
15339 rela.r_addend = 0;
15340 loc = htab->relbss->contents;
15341 loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela);
15342 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
15343 }
15344
15345 return TRUE;
15346 }
15347
15348 /* Used to decide how to sort relocs in an optimal manner for the
15349 dynamic linker, before writing them out. */
15350
15351 static enum elf_reloc_type_class
15352 ppc64_elf_reloc_type_class (const struct bfd_link_info *info,
15353 const asection *rel_sec,
15354 const Elf_Internal_Rela *rela)
15355 {
15356 enum elf_ppc64_reloc_type r_type;
15357 struct ppc_link_hash_table *htab = ppc_hash_table (info);
15358
15359 if (rel_sec == htab->elf.irelplt)
15360 return reloc_class_ifunc;
15361
15362 r_type = ELF64_R_TYPE (rela->r_info);
15363 switch (r_type)
15364 {
15365 case R_PPC64_RELATIVE:
15366 return reloc_class_relative;
15367 case R_PPC64_JMP_SLOT:
15368 return reloc_class_plt;
15369 case R_PPC64_COPY:
15370 return reloc_class_copy;
15371 default:
15372 return reloc_class_normal;
15373 }
15374 }
15375
15376 /* Finish up the dynamic sections. */
15377
15378 static bfd_boolean
15379 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
15380 struct bfd_link_info *info)
15381 {
15382 struct ppc_link_hash_table *htab;
15383 bfd *dynobj;
15384 asection *sdyn;
15385
15386 htab = ppc_hash_table (info);
15387 if (htab == NULL)
15388 return FALSE;
15389
15390 dynobj = htab->elf.dynobj;
15391 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
15392
15393 if (htab->elf.dynamic_sections_created)
15394 {
15395 Elf64_External_Dyn *dyncon, *dynconend;
15396
15397 if (sdyn == NULL || htab->elf.sgot == NULL)
15398 abort ();
15399
15400 dyncon = (Elf64_External_Dyn *) sdyn->contents;
15401 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
15402 for (; dyncon < dynconend; dyncon++)
15403 {
15404 Elf_Internal_Dyn dyn;
15405 asection *s;
15406
15407 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
15408
15409 switch (dyn.d_tag)
15410 {
15411 default:
15412 continue;
15413
15414 case DT_PPC64_GLINK:
15415 s = htab->glink;
15416 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15417 /* We stupidly defined DT_PPC64_GLINK to be the start
15418 of glink rather than the first entry point, which is
15419 what ld.so needs, and now have a bigger stub to
15420 support automatic multiple TOCs. */
15421 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 8 * 4;
15422 break;
15423
15424 case DT_PPC64_OPD:
15425 s = bfd_get_section_by_name (output_bfd, ".opd");
15426 if (s == NULL)
15427 continue;
15428 dyn.d_un.d_ptr = s->vma;
15429 break;
15430
15431 case DT_PPC64_OPT:
15432 if (htab->do_multi_toc && htab->multi_toc_needed)
15433 dyn.d_un.d_val |= PPC64_OPT_MULTI_TOC;
15434 break;
15435
15436 case DT_PPC64_OPDSZ:
15437 s = bfd_get_section_by_name (output_bfd, ".opd");
15438 if (s == NULL)
15439 continue;
15440 dyn.d_un.d_val = s->size;
15441 break;
15442
15443 case DT_PLTGOT:
15444 s = htab->elf.splt;
15445 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15446 break;
15447
15448 case DT_JMPREL:
15449 s = htab->elf.srelplt;
15450 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15451 break;
15452
15453 case DT_PLTRELSZ:
15454 dyn.d_un.d_val = htab->elf.srelplt->size;
15455 break;
15456
15457 case DT_RELASZ:
15458 /* Don't count procedure linkage table relocs in the
15459 overall reloc count. */
15460 s = htab->elf.srelplt;
15461 if (s == NULL)
15462 continue;
15463 dyn.d_un.d_val -= s->size;
15464 break;
15465
15466 case DT_RELA:
15467 /* We may not be using the standard ELF linker script.
15468 If .rela.plt is the first .rela section, we adjust
15469 DT_RELA to not include it. */
15470 s = htab->elf.srelplt;
15471 if (s == NULL)
15472 continue;
15473 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
15474 continue;
15475 dyn.d_un.d_ptr += s->size;
15476 break;
15477 }
15478
15479 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
15480 }
15481 }
15482
15483 if (htab->elf.sgot != NULL && htab->elf.sgot->size != 0)
15484 {
15485 /* Fill in the first entry in the global offset table.
15486 We use it to hold the link-time TOCbase. */
15487 bfd_put_64 (output_bfd,
15488 elf_gp (output_bfd) + TOC_BASE_OFF,
15489 htab->elf.sgot->contents);
15490
15491 /* Set .got entry size. */
15492 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 8;
15493 }
15494
15495 if (htab->elf.splt != NULL && htab->elf.splt->size != 0)
15496 {
15497 /* Set .plt entry size. */
15498 elf_section_data (htab->elf.splt->output_section)->this_hdr.sh_entsize
15499 = PLT_ENTRY_SIZE (htab);
15500 }
15501
15502 /* brlt is SEC_LINKER_CREATED, so we need to write out relocs for
15503 brlt ourselves if emitrelocations. */
15504 if (htab->brlt != NULL
15505 && htab->brlt->reloc_count != 0
15506 && !_bfd_elf_link_output_relocs (output_bfd,
15507 htab->brlt,
15508 elf_section_data (htab->brlt)->rela.hdr,
15509 elf_section_data (htab->brlt)->relocs,
15510 NULL))
15511 return FALSE;
15512
15513 if (htab->glink != NULL
15514 && htab->glink->reloc_count != 0
15515 && !_bfd_elf_link_output_relocs (output_bfd,
15516 htab->glink,
15517 elf_section_data (htab->glink)->rela.hdr,
15518 elf_section_data (htab->glink)->relocs,
15519 NULL))
15520 return FALSE;
15521
15522 if (htab->glink_eh_frame != NULL
15523 && htab->glink_eh_frame->size != 0)
15524 {
15525 bfd_vma val;
15526 bfd_byte *p;
15527 asection *stub_sec;
15528
15529 p = htab->glink_eh_frame->contents + sizeof (glink_eh_frame_cie);
15530 for (stub_sec = htab->params->stub_bfd->sections;
15531 stub_sec != NULL;
15532 stub_sec = stub_sec->next)
15533 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
15534 {
15535 /* FDE length. */
15536 p += 4;
15537 /* CIE pointer. */
15538 p += 4;
15539 /* Offset to stub section. */
15540 val = (stub_sec->output_section->vma
15541 + stub_sec->output_offset);
15542 val -= (htab->glink_eh_frame->output_section->vma
15543 + htab->glink_eh_frame->output_offset
15544 + (p - htab->glink_eh_frame->contents));
15545 if (val + 0x80000000 > 0xffffffff)
15546 {
15547 info->callbacks->einfo
15548 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
15549 stub_sec->name);
15550 return FALSE;
15551 }
15552 bfd_put_32 (dynobj, val, p);
15553 p += 4;
15554 /* stub section size. */
15555 p += 4;
15556 /* Augmentation. */
15557 p += 1;
15558 /* Pad. */
15559 p += 7;
15560 }
15561 if (htab->glink != NULL && htab->glink->size != 0)
15562 {
15563 /* FDE length. */
15564 p += 4;
15565 /* CIE pointer. */
15566 p += 4;
15567 /* Offset to .glink. */
15568 val = (htab->glink->output_section->vma
15569 + htab->glink->output_offset
15570 + 8);
15571 val -= (htab->glink_eh_frame->output_section->vma
15572 + htab->glink_eh_frame->output_offset
15573 + (p - htab->glink_eh_frame->contents));
15574 if (val + 0x80000000 > 0xffffffff)
15575 {
15576 info->callbacks->einfo
15577 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
15578 htab->glink->name);
15579 return FALSE;
15580 }
15581 bfd_put_32 (dynobj, val, p);
15582 p += 4;
15583 /* .glink size. */
15584 p += 4;
15585 /* Augmentation. */
15586 p += 1;
15587 /* Ops. */
15588 p += 7;
15589 }
15590
15591 if (htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME
15592 && !_bfd_elf_write_section_eh_frame (output_bfd, info,
15593 htab->glink_eh_frame,
15594 htab->glink_eh_frame->contents))
15595 return FALSE;
15596 }
15597
15598 /* We need to handle writing out multiple GOT sections ourselves,
15599 since we didn't add them to DYNOBJ. We know dynobj is the first
15600 bfd. */
15601 while ((dynobj = dynobj->link.next) != NULL)
15602 {
15603 asection *s;
15604
15605 if (!is_ppc64_elf (dynobj))
15606 continue;
15607
15608 s = ppc64_elf_tdata (dynobj)->got;
15609 if (s != NULL
15610 && s->size != 0
15611 && s->output_section != bfd_abs_section_ptr
15612 && !bfd_set_section_contents (output_bfd, s->output_section,
15613 s->contents, s->output_offset,
15614 s->size))
15615 return FALSE;
15616 s = ppc64_elf_tdata (dynobj)->relgot;
15617 if (s != NULL
15618 && s->size != 0
15619 && s->output_section != bfd_abs_section_ptr
15620 && !bfd_set_section_contents (output_bfd, s->output_section,
15621 s->contents, s->output_offset,
15622 s->size))
15623 return FALSE;
15624 }
15625
15626 return TRUE;
15627 }
15628
15629 #include "elf64-target.h"
15630
15631 /* FreeBSD support */
15632
15633 #undef TARGET_LITTLE_SYM
15634 #undef TARGET_LITTLE_NAME
15635
15636 #undef TARGET_BIG_SYM
15637 #define TARGET_BIG_SYM powerpc_elf64_fbsd_vec
15638 #undef TARGET_BIG_NAME
15639 #define TARGET_BIG_NAME "elf64-powerpc-freebsd"
15640
15641 #undef ELF_OSABI
15642 #define ELF_OSABI ELFOSABI_FREEBSD
15643
15644 #undef elf64_bed
15645 #define elf64_bed elf64_powerpc_fbsd_bed
15646
15647 #include "elf64-target.h"
15648
GDB Binutils - Deliverables
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