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PR 20472, PowerPC64 ifunc confusion
[deliverable/binutils-gdb.git] / bfd / elf64-ppc.c
1 /* PowerPC64-specific support for 64-bit ELF.
2 Copyright (C) 1999-2016 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 ppc64_elf_unhandled_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 && symbol->section->owner != NULL
2574 && abiversion (symbol->section->owner) >= 2)
2575 {
2576 unsigned int i;
2577
2578 for (i = 0; i < symbol->section->owner->symcount; ++i)
2579 {
2580 asymbol *symdef = symbol->section->owner->outsymbols[i];
2581
2582 if (strcmp (symdef->name, symbol->name) == 0)
2583 {
2584 elfsym = (elf_symbol_type *) symdef;
2585 break;
2586 }
2587 }
2588 }
2589 reloc_entry->addend
2590 += PPC64_LOCAL_ENTRY_OFFSET (elfsym->internal_elf_sym.st_other);
2591 }
2592 return bfd_reloc_continue;
2593 }
2594
2595 static bfd_reloc_status_type
2596 ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2597 void *data, asection *input_section,
2598 bfd *output_bfd, char **error_message)
2599 {
2600 long insn;
2601 enum elf_ppc64_reloc_type r_type;
2602 bfd_size_type octets;
2603 /* Assume 'at' branch hints. */
2604 bfd_boolean is_isa_v2 = TRUE;
2605
2606 /* If this is a relocatable link (output_bfd test tells us), just
2607 call the generic function. Any adjustment will be done at final
2608 link time. */
2609 if (output_bfd != NULL)
2610 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2611 input_section, output_bfd, error_message);
2612
2613 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2614 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2615 insn &= ~(0x01 << 21);
2616 r_type = reloc_entry->howto->type;
2617 if (r_type == R_PPC64_ADDR14_BRTAKEN
2618 || r_type == R_PPC64_REL14_BRTAKEN)
2619 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
2620
2621 if (is_isa_v2)
2622 {
2623 /* Set 'a' bit. This is 0b00010 in BO field for branch
2624 on CR(BI) insns (BO == 001at or 011at), and 0b01000
2625 for branch on CTR insns (BO == 1a00t or 1a01t). */
2626 if ((insn & (0x14 << 21)) == (0x04 << 21))
2627 insn |= 0x02 << 21;
2628 else if ((insn & (0x14 << 21)) == (0x10 << 21))
2629 insn |= 0x08 << 21;
2630 else
2631 goto out;
2632 }
2633 else
2634 {
2635 bfd_vma target = 0;
2636 bfd_vma from;
2637
2638 if (!bfd_is_com_section (symbol->section))
2639 target = symbol->value;
2640 target += symbol->section->output_section->vma;
2641 target += symbol->section->output_offset;
2642 target += reloc_entry->addend;
2643
2644 from = (reloc_entry->address
2645 + input_section->output_offset
2646 + input_section->output_section->vma);
2647
2648 /* Invert 'y' bit if not the default. */
2649 if ((bfd_signed_vma) (target - from) < 0)
2650 insn ^= 0x01 << 21;
2651 }
2652 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2653 out:
2654 return ppc64_elf_branch_reloc (abfd, reloc_entry, symbol, data,
2655 input_section, output_bfd, error_message);
2656 }
2657
2658 static bfd_reloc_status_type
2659 ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2660 void *data, asection *input_section,
2661 bfd *output_bfd, char **error_message)
2662 {
2663 /* If this is a relocatable link (output_bfd test tells us), just
2664 call the generic function. Any adjustment will be done at final
2665 link time. */
2666 if (output_bfd != NULL)
2667 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2668 input_section, output_bfd, error_message);
2669
2670 /* Subtract the symbol section base address. */
2671 reloc_entry->addend -= symbol->section->output_section->vma;
2672 return bfd_reloc_continue;
2673 }
2674
2675 static bfd_reloc_status_type
2676 ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2677 void *data, asection *input_section,
2678 bfd *output_bfd, char **error_message)
2679 {
2680 /* If this is a relocatable link (output_bfd test tells us), just
2681 call the generic function. Any adjustment will be done at final
2682 link time. */
2683 if (output_bfd != NULL)
2684 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2685 input_section, output_bfd, error_message);
2686
2687 /* Subtract the symbol section base address. */
2688 reloc_entry->addend -= symbol->section->output_section->vma;
2689
2690 /* Adjust the addend for sign extension of the low 16 bits. */
2691 reloc_entry->addend += 0x8000;
2692 return bfd_reloc_continue;
2693 }
2694
2695 static bfd_reloc_status_type
2696 ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2697 void *data, asection *input_section,
2698 bfd *output_bfd, char **error_message)
2699 {
2700 bfd_vma TOCstart;
2701
2702 /* If this is a relocatable link (output_bfd test tells us), just
2703 call the generic function. Any adjustment will be done at final
2704 link time. */
2705 if (output_bfd != NULL)
2706 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2707 input_section, output_bfd, error_message);
2708
2709 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2710 if (TOCstart == 0)
2711 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2712
2713 /* Subtract the TOC base address. */
2714 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2715 return bfd_reloc_continue;
2716 }
2717
2718 static bfd_reloc_status_type
2719 ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2720 void *data, asection *input_section,
2721 bfd *output_bfd, char **error_message)
2722 {
2723 bfd_vma TOCstart;
2724
2725 /* If this is a relocatable link (output_bfd test tells us), just
2726 call the generic function. Any adjustment will be done at final
2727 link time. */
2728 if (output_bfd != NULL)
2729 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2730 input_section, output_bfd, error_message);
2731
2732 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2733 if (TOCstart == 0)
2734 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2735
2736 /* Subtract the TOC base address. */
2737 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2738
2739 /* Adjust the addend for sign extension of the low 16 bits. */
2740 reloc_entry->addend += 0x8000;
2741 return bfd_reloc_continue;
2742 }
2743
2744 static bfd_reloc_status_type
2745 ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2746 void *data, asection *input_section,
2747 bfd *output_bfd, char **error_message)
2748 {
2749 bfd_vma TOCstart;
2750 bfd_size_type octets;
2751
2752 /* If this is a relocatable link (output_bfd test tells us), just
2753 call the generic function. Any adjustment will be done at final
2754 link time. */
2755 if (output_bfd != NULL)
2756 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2757 input_section, output_bfd, error_message);
2758
2759 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2760 if (TOCstart == 0)
2761 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2762
2763 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2764 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
2765 return bfd_reloc_ok;
2766 }
2767
2768 static bfd_reloc_status_type
2769 ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2770 void *data, asection *input_section,
2771 bfd *output_bfd, char **error_message)
2772 {
2773 /* If this is a relocatable link (output_bfd test tells us), just
2774 call the generic function. Any adjustment will be done at final
2775 link time. */
2776 if (output_bfd != NULL)
2777 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2778 input_section, output_bfd, error_message);
2779
2780 if (error_message != NULL)
2781 {
2782 static char buf[60];
2783 sprintf (buf, "generic linker can't handle %s",
2784 reloc_entry->howto->name);
2785 *error_message = buf;
2786 }
2787 return bfd_reloc_dangerous;
2788 }
2789
2790 /* Track GOT entries needed for a given symbol. We might need more
2791 than one got entry per symbol. */
2792 struct got_entry
2793 {
2794 struct got_entry *next;
2795
2796 /* The symbol addend that we'll be placing in the GOT. */
2797 bfd_vma addend;
2798
2799 /* Unlike other ELF targets, we use separate GOT entries for the same
2800 symbol referenced from different input files. This is to support
2801 automatic multiple TOC/GOT sections, where the TOC base can vary
2802 from one input file to another. After partitioning into TOC groups
2803 we merge entries within the group.
2804
2805 Point to the BFD owning this GOT entry. */
2806 bfd *owner;
2807
2808 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
2809 TLS_TPREL or TLS_DTPREL for tls entries. */
2810 unsigned char tls_type;
2811
2812 /* Non-zero if got.ent points to real entry. */
2813 unsigned char is_indirect;
2814
2815 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
2816 union
2817 {
2818 bfd_signed_vma refcount;
2819 bfd_vma offset;
2820 struct got_entry *ent;
2821 } got;
2822 };
2823
2824 /* The same for PLT. */
2825 struct plt_entry
2826 {
2827 struct plt_entry *next;
2828
2829 bfd_vma addend;
2830
2831 union
2832 {
2833 bfd_signed_vma refcount;
2834 bfd_vma offset;
2835 } plt;
2836 };
2837
2838 struct ppc64_elf_obj_tdata
2839 {
2840 struct elf_obj_tdata elf;
2841
2842 /* Shortcuts to dynamic linker sections. */
2843 asection *got;
2844 asection *relgot;
2845
2846 /* Used during garbage collection. We attach global symbols defined
2847 on removed .opd entries to this section so that the sym is removed. */
2848 asection *deleted_section;
2849
2850 /* TLS local dynamic got entry handling. Support for multiple GOT
2851 sections means we potentially need one of these for each input bfd. */
2852 struct got_entry tlsld_got;
2853
2854 union {
2855 /* A copy of relocs before they are modified for --emit-relocs. */
2856 Elf_Internal_Rela *relocs;
2857
2858 /* Section contents. */
2859 bfd_byte *contents;
2860 } opd;
2861
2862 /* Nonzero if this bfd has small toc/got relocs, ie. that expect
2863 the reloc to be in the range -32768 to 32767. */
2864 unsigned int has_small_toc_reloc : 1;
2865
2866 /* Set if toc/got ha relocs detected not using r2, or lo reloc
2867 instruction not one we handle. */
2868 unsigned int unexpected_toc_insn : 1;
2869 };
2870
2871 #define ppc64_elf_tdata(bfd) \
2872 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
2873
2874 #define ppc64_tlsld_got(bfd) \
2875 (&ppc64_elf_tdata (bfd)->tlsld_got)
2876
2877 #define is_ppc64_elf(bfd) \
2878 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2879 && elf_object_id (bfd) == PPC64_ELF_DATA)
2880
2881 /* Override the generic function because we store some extras. */
2882
2883 static bfd_boolean
2884 ppc64_elf_mkobject (bfd *abfd)
2885 {
2886 return bfd_elf_allocate_object (abfd, sizeof (struct ppc64_elf_obj_tdata),
2887 PPC64_ELF_DATA);
2888 }
2889
2890 /* Fix bad default arch selected for a 64 bit input bfd when the
2891 default is 32 bit. Also select arch based on apuinfo. */
2892
2893 static bfd_boolean
2894 ppc64_elf_object_p (bfd *abfd)
2895 {
2896 if (!abfd->arch_info->the_default)
2897 return TRUE;
2898
2899 if (abfd->arch_info->bits_per_word == 32)
2900 {
2901 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2902
2903 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2904 {
2905 /* Relies on arch after 32 bit default being 64 bit default. */
2906 abfd->arch_info = abfd->arch_info->next;
2907 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2908 }
2909 }
2910 return _bfd_elf_ppc_set_arch (abfd);
2911 }
2912
2913 /* Support for core dump NOTE sections. */
2914
2915 static bfd_boolean
2916 ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2917 {
2918 size_t offset, size;
2919
2920 if (note->descsz != 504)
2921 return FALSE;
2922
2923 /* pr_cursig */
2924 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
2925
2926 /* pr_pid */
2927 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 32);
2928
2929 /* pr_reg */
2930 offset = 112;
2931 size = 384;
2932
2933 /* Make a ".reg/999" section. */
2934 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2935 size, note->descpos + offset);
2936 }
2937
2938 static bfd_boolean
2939 ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2940 {
2941 if (note->descsz != 136)
2942 return FALSE;
2943
2944 elf_tdata (abfd)->core->pid
2945 = bfd_get_32 (abfd, note->descdata + 24);
2946 elf_tdata (abfd)->core->program
2947 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
2948 elf_tdata (abfd)->core->command
2949 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
2950
2951 return TRUE;
2952 }
2953
2954 static char *
2955 ppc64_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type,
2956 ...)
2957 {
2958 switch (note_type)
2959 {
2960 default:
2961 return NULL;
2962
2963 case NT_PRPSINFO:
2964 {
2965 char data[136];
2966 va_list ap;
2967
2968 va_start (ap, note_type);
2969 memset (data, 0, sizeof (data));
2970 strncpy (data + 40, va_arg (ap, const char *), 16);
2971 strncpy (data + 56, va_arg (ap, const char *), 80);
2972 va_end (ap);
2973 return elfcore_write_note (abfd, buf, bufsiz,
2974 "CORE", note_type, data, sizeof (data));
2975 }
2976
2977 case NT_PRSTATUS:
2978 {
2979 char data[504];
2980 va_list ap;
2981 long pid;
2982 int cursig;
2983 const void *greg;
2984
2985 va_start (ap, note_type);
2986 memset (data, 0, 112);
2987 pid = va_arg (ap, long);
2988 bfd_put_32 (abfd, pid, data + 32);
2989 cursig = va_arg (ap, int);
2990 bfd_put_16 (abfd, cursig, data + 12);
2991 greg = va_arg (ap, const void *);
2992 memcpy (data + 112, greg, 384);
2993 memset (data + 496, 0, 8);
2994 va_end (ap);
2995 return elfcore_write_note (abfd, buf, bufsiz,
2996 "CORE", note_type, data, sizeof (data));
2997 }
2998 }
2999 }
3000
3001 /* Add extra PPC sections. */
3002
3003 static const struct bfd_elf_special_section ppc64_elf_special_sections[]=
3004 {
3005 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, 0 },
3006 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
3007 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
3008 { STRING_COMMA_LEN (".toc"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
3009 { STRING_COMMA_LEN (".toc1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
3010 { STRING_COMMA_LEN (".tocbss"), 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
3011 { NULL, 0, 0, 0, 0 }
3012 };
3013
3014 enum _ppc64_sec_type {
3015 sec_normal = 0,
3016 sec_opd = 1,
3017 sec_toc = 2
3018 };
3019
3020 struct _ppc64_elf_section_data
3021 {
3022 struct bfd_elf_section_data elf;
3023
3024 union
3025 {
3026 /* An array with one entry for each opd function descriptor,
3027 and some spares since opd entries may be either 16 or 24 bytes. */
3028 #define OPD_NDX(OFF) ((OFF) >> 4)
3029 struct _opd_sec_data
3030 {
3031 /* Points to the function code section for local opd entries. */
3032 asection **func_sec;
3033
3034 /* After editing .opd, adjust references to opd local syms. */
3035 long *adjust;
3036 } opd;
3037
3038 /* An array for toc sections, indexed by offset/8. */
3039 struct _toc_sec_data
3040 {
3041 /* Specifies the relocation symbol index used at a given toc offset. */
3042 unsigned *symndx;
3043
3044 /* And the relocation addend. */
3045 bfd_vma *add;
3046 } toc;
3047 } u;
3048
3049 enum _ppc64_sec_type sec_type:2;
3050
3051 /* Flag set when small branches are detected. Used to
3052 select suitable defaults for the stub group size. */
3053 unsigned int has_14bit_branch:1;
3054 };
3055
3056 #define ppc64_elf_section_data(sec) \
3057 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
3058
3059 static bfd_boolean
3060 ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
3061 {
3062 if (!sec->used_by_bfd)
3063 {
3064 struct _ppc64_elf_section_data *sdata;
3065 bfd_size_type amt = sizeof (*sdata);
3066
3067 sdata = bfd_zalloc (abfd, amt);
3068 if (sdata == NULL)
3069 return FALSE;
3070 sec->used_by_bfd = sdata;
3071 }
3072
3073 return _bfd_elf_new_section_hook (abfd, sec);
3074 }
3075
3076 static struct _opd_sec_data *
3077 get_opd_info (asection * sec)
3078 {
3079 if (sec != NULL
3080 && ppc64_elf_section_data (sec) != NULL
3081 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
3082 return &ppc64_elf_section_data (sec)->u.opd;
3083 return NULL;
3084 }
3085 \f
3086 /* Parameters for the qsort hook. */
3087 static bfd_boolean synthetic_relocatable;
3088
3089 /* qsort comparison function for ppc64_elf_get_synthetic_symtab. */
3090
3091 static int
3092 compare_symbols (const void *ap, const void *bp)
3093 {
3094 const asymbol *a = * (const asymbol **) ap;
3095 const asymbol *b = * (const asymbol **) bp;
3096
3097 /* Section symbols first. */
3098 if ((a->flags & BSF_SECTION_SYM) && !(b->flags & BSF_SECTION_SYM))
3099 return -1;
3100 if (!(a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM))
3101 return 1;
3102
3103 /* then .opd symbols. */
3104 if (strcmp (a->section->name, ".opd") == 0
3105 && strcmp (b->section->name, ".opd") != 0)
3106 return -1;
3107 if (strcmp (a->section->name, ".opd") != 0
3108 && strcmp (b->section->name, ".opd") == 0)
3109 return 1;
3110
3111 /* then other code symbols. */
3112 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3113 == (SEC_CODE | SEC_ALLOC)
3114 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3115 != (SEC_CODE | SEC_ALLOC))
3116 return -1;
3117
3118 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3119 != (SEC_CODE | SEC_ALLOC)
3120 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3121 == (SEC_CODE | SEC_ALLOC))
3122 return 1;
3123
3124 if (synthetic_relocatable)
3125 {
3126 if (a->section->id < b->section->id)
3127 return -1;
3128
3129 if (a->section->id > b->section->id)
3130 return 1;
3131 }
3132
3133 if (a->value + a->section->vma < b->value + b->section->vma)
3134 return -1;
3135
3136 if (a->value + a->section->vma > b->value + b->section->vma)
3137 return 1;
3138
3139 /* For syms with the same value, prefer strong dynamic global function
3140 syms over other syms. */
3141 if ((a->flags & BSF_GLOBAL) != 0 && (b->flags & BSF_GLOBAL) == 0)
3142 return -1;
3143
3144 if ((a->flags & BSF_GLOBAL) == 0 && (b->flags & BSF_GLOBAL) != 0)
3145 return 1;
3146
3147 if ((a->flags & BSF_FUNCTION) != 0 && (b->flags & BSF_FUNCTION) == 0)
3148 return -1;
3149
3150 if ((a->flags & BSF_FUNCTION) == 0 && (b->flags & BSF_FUNCTION) != 0)
3151 return 1;
3152
3153 if ((a->flags & BSF_WEAK) == 0 && (b->flags & BSF_WEAK) != 0)
3154 return -1;
3155
3156 if ((a->flags & BSF_WEAK) != 0 && (b->flags & BSF_WEAK) == 0)
3157 return 1;
3158
3159 if ((a->flags & BSF_DYNAMIC) != 0 && (b->flags & BSF_DYNAMIC) == 0)
3160 return -1;
3161
3162 if ((a->flags & BSF_DYNAMIC) == 0 && (b->flags & BSF_DYNAMIC) != 0)
3163 return 1;
3164
3165 return 0;
3166 }
3167
3168 /* Search SYMS for a symbol of the given VALUE. */
3169
3170 static asymbol *
3171 sym_exists_at (asymbol **syms, long lo, long hi, unsigned int id, bfd_vma value)
3172 {
3173 long mid;
3174
3175 if (id == (unsigned) -1)
3176 {
3177 while (lo < hi)
3178 {
3179 mid = (lo + hi) >> 1;
3180 if (syms[mid]->value + syms[mid]->section->vma < value)
3181 lo = mid + 1;
3182 else if (syms[mid]->value + syms[mid]->section->vma > value)
3183 hi = mid;
3184 else
3185 return syms[mid];
3186 }
3187 }
3188 else
3189 {
3190 while (lo < hi)
3191 {
3192 mid = (lo + hi) >> 1;
3193 if (syms[mid]->section->id < id)
3194 lo = mid + 1;
3195 else if (syms[mid]->section->id > id)
3196 hi = mid;
3197 else if (syms[mid]->value < value)
3198 lo = mid + 1;
3199 else if (syms[mid]->value > value)
3200 hi = mid;
3201 else
3202 return syms[mid];
3203 }
3204 }
3205 return NULL;
3206 }
3207
3208 static bfd_boolean
3209 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
3210 {
3211 bfd_vma vma = *(bfd_vma *) ptr;
3212 return ((section->flags & SEC_ALLOC) != 0
3213 && section->vma <= vma
3214 && vma < section->vma + section->size);
3215 }
3216
3217 /* Create synthetic symbols, effectively restoring "dot-symbol" function
3218 entry syms. Also generate @plt symbols for the glink branch table.
3219 Returns count of synthetic symbols in RET or -1 on error. */
3220
3221 static long
3222 ppc64_elf_get_synthetic_symtab (bfd *abfd,
3223 long static_count, asymbol **static_syms,
3224 long dyn_count, asymbol **dyn_syms,
3225 asymbol **ret)
3226 {
3227 asymbol *s;
3228 long i;
3229 long count;
3230 char *names;
3231 long symcount, codesecsym, codesecsymend, secsymend, opdsymend;
3232 asection *opd = NULL;
3233 bfd_boolean relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0;
3234 asymbol **syms;
3235 int abi = abiversion (abfd);
3236
3237 *ret = NULL;
3238
3239 if (abi < 2)
3240 {
3241 opd = bfd_get_section_by_name (abfd, ".opd");
3242 if (opd == NULL && abi == 1)
3243 return 0;
3244 }
3245
3246 symcount = static_count;
3247 if (!relocatable)
3248 symcount += dyn_count;
3249 if (symcount == 0)
3250 return 0;
3251
3252 syms = bfd_malloc ((symcount + 1) * sizeof (*syms));
3253 if (syms == NULL)
3254 return -1;
3255
3256 if (!relocatable && static_count != 0 && dyn_count != 0)
3257 {
3258 /* Use both symbol tables. */
3259 memcpy (syms, static_syms, static_count * sizeof (*syms));
3260 memcpy (syms + static_count, dyn_syms, (dyn_count + 1) * sizeof (*syms));
3261 }
3262 else if (!relocatable && static_count == 0)
3263 memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms));
3264 else
3265 memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms));
3266
3267 synthetic_relocatable = relocatable;
3268 qsort (syms, symcount, sizeof (*syms), compare_symbols);
3269
3270 if (!relocatable && symcount > 1)
3271 {
3272 long j;
3273 /* Trim duplicate syms, since we may have merged the normal and
3274 dynamic symbols. Actually, we only care about syms that have
3275 different values, so trim any with the same value. */
3276 for (i = 1, j = 1; i < symcount; ++i)
3277 if (syms[i - 1]->value + syms[i - 1]->section->vma
3278 != syms[i]->value + syms[i]->section->vma)
3279 syms[j++] = syms[i];
3280 symcount = j;
3281 }
3282
3283 i = 0;
3284 if (strcmp (syms[i]->section->name, ".opd") == 0)
3285 ++i;
3286 codesecsym = i;
3287
3288 for (; i < symcount; ++i)
3289 if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3290 != (SEC_CODE | SEC_ALLOC))
3291 || (syms[i]->flags & BSF_SECTION_SYM) == 0)
3292 break;
3293 codesecsymend = i;
3294
3295 for (; i < symcount; ++i)
3296 if ((syms[i]->flags & BSF_SECTION_SYM) == 0)
3297 break;
3298 secsymend = i;
3299
3300 for (; i < symcount; ++i)
3301 if (strcmp (syms[i]->section->name, ".opd") != 0)
3302 break;
3303 opdsymend = i;
3304
3305 for (; i < symcount; ++i)
3306 if ((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3307 != (SEC_CODE | SEC_ALLOC))
3308 break;
3309 symcount = i;
3310
3311 count = 0;
3312
3313 if (relocatable)
3314 {
3315 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3316 arelent *r;
3317 size_t size;
3318 long relcount;
3319
3320 if (opdsymend == secsymend)
3321 goto done;
3322
3323 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3324 relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0;
3325 if (relcount == 0)
3326 goto done;
3327
3328 if (!(*slurp_relocs) (abfd, opd, static_syms, FALSE))
3329 {
3330 count = -1;
3331 goto done;
3332 }
3333
3334 size = 0;
3335 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3336 {
3337 asymbol *sym;
3338
3339 while (r < opd->relocation + relcount
3340 && r->address < syms[i]->value + opd->vma)
3341 ++r;
3342
3343 if (r == opd->relocation + relcount)
3344 break;
3345
3346 if (r->address != syms[i]->value + opd->vma)
3347 continue;
3348
3349 if (r->howto->type != R_PPC64_ADDR64)
3350 continue;
3351
3352 sym = *r->sym_ptr_ptr;
3353 if (!sym_exists_at (syms, opdsymend, symcount,
3354 sym->section->id, sym->value + r->addend))
3355 {
3356 ++count;
3357 size += sizeof (asymbol);
3358 size += strlen (syms[i]->name) + 2;
3359 }
3360 }
3361
3362 if (size == 0)
3363 goto done;
3364 s = *ret = bfd_malloc (size);
3365 if (s == NULL)
3366 {
3367 count = -1;
3368 goto done;
3369 }
3370
3371 names = (char *) (s + count);
3372
3373 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3374 {
3375 asymbol *sym;
3376
3377 while (r < opd->relocation + relcount
3378 && r->address < syms[i]->value + opd->vma)
3379 ++r;
3380
3381 if (r == opd->relocation + relcount)
3382 break;
3383
3384 if (r->address != syms[i]->value + opd->vma)
3385 continue;
3386
3387 if (r->howto->type != R_PPC64_ADDR64)
3388 continue;
3389
3390 sym = *r->sym_ptr_ptr;
3391 if (!sym_exists_at (syms, opdsymend, symcount,
3392 sym->section->id, sym->value + r->addend))
3393 {
3394 size_t len;
3395
3396 *s = *syms[i];
3397 s->flags |= BSF_SYNTHETIC;
3398 s->section = sym->section;
3399 s->value = sym->value + r->addend;
3400 s->name = names;
3401 *names++ = '.';
3402 len = strlen (syms[i]->name);
3403 memcpy (names, syms[i]->name, len + 1);
3404 names += len + 1;
3405 /* Have udata.p point back to the original symbol this
3406 synthetic symbol was derived from. */
3407 s->udata.p = syms[i];
3408 s++;
3409 }
3410 }
3411 }
3412 else
3413 {
3414 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3415 bfd_byte *contents = NULL;
3416 size_t size;
3417 long plt_count = 0;
3418 bfd_vma glink_vma = 0, resolv_vma = 0;
3419 asection *dynamic, *glink = NULL, *relplt = NULL;
3420 arelent *p;
3421
3422 if (opd != NULL && !bfd_malloc_and_get_section (abfd, opd, &contents))
3423 {
3424 free_contents_and_exit_err:
3425 count = -1;
3426 free_contents_and_exit:
3427 if (contents)
3428 free (contents);
3429 goto done;
3430 }
3431
3432 size = 0;
3433 for (i = secsymend; i < opdsymend; ++i)
3434 {
3435 bfd_vma ent;
3436
3437 /* Ignore bogus symbols. */
3438 if (syms[i]->value > opd->size - 8)
3439 continue;
3440
3441 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3442 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3443 {
3444 ++count;
3445 size += sizeof (asymbol);
3446 size += strlen (syms[i]->name) + 2;
3447 }
3448 }
3449
3450 /* Get start of .glink stubs from DT_PPC64_GLINK. */
3451 if (dyn_count != 0
3452 && (dynamic = bfd_get_section_by_name (abfd, ".dynamic")) != NULL)
3453 {
3454 bfd_byte *dynbuf, *extdyn, *extdynend;
3455 size_t extdynsize;
3456 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
3457
3458 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
3459 goto free_contents_and_exit_err;
3460
3461 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
3462 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
3463
3464 extdyn = dynbuf;
3465 extdynend = extdyn + dynamic->size;
3466 for (; extdyn < extdynend; extdyn += extdynsize)
3467 {
3468 Elf_Internal_Dyn dyn;
3469 (*swap_dyn_in) (abfd, extdyn, &dyn);
3470
3471 if (dyn.d_tag == DT_NULL)
3472 break;
3473
3474 if (dyn.d_tag == DT_PPC64_GLINK)
3475 {
3476 /* The first glink stub starts at offset 32; see
3477 comment in ppc64_elf_finish_dynamic_sections. */
3478 glink_vma = dyn.d_un.d_val + GLINK_CALL_STUB_SIZE - 8 * 4;
3479 /* The .glink section usually does not survive the final
3480 link; search for the section (usually .text) where the
3481 glink stubs now reside. */
3482 glink = bfd_sections_find_if (abfd, section_covers_vma,
3483 &glink_vma);
3484 break;
3485 }
3486 }
3487
3488 free (dynbuf);
3489 }
3490
3491 if (glink != NULL)
3492 {
3493 /* Determine __glink trampoline by reading the relative branch
3494 from the first glink stub. */
3495 bfd_byte buf[4];
3496 unsigned int off = 0;
3497
3498 while (bfd_get_section_contents (abfd, glink, buf,
3499 glink_vma + off - glink->vma, 4))
3500 {
3501 unsigned int insn = bfd_get_32 (abfd, buf);
3502 insn ^= B_DOT;
3503 if ((insn & ~0x3fffffc) == 0)
3504 {
3505 resolv_vma = glink_vma + off + (insn ^ 0x2000000) - 0x2000000;
3506 break;
3507 }
3508 off += 4;
3509 if (off > 4)
3510 break;
3511 }
3512
3513 if (resolv_vma)
3514 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
3515
3516 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
3517 if (relplt != NULL)
3518 {
3519 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3520 if (! (*slurp_relocs) (abfd, relplt, dyn_syms, TRUE))
3521 goto free_contents_and_exit_err;
3522
3523 plt_count = relplt->size / sizeof (Elf64_External_Rela);
3524 size += plt_count * sizeof (asymbol);
3525
3526 p = relplt->relocation;
3527 for (i = 0; i < plt_count; i++, p++)
3528 {
3529 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
3530 if (p->addend != 0)
3531 size += sizeof ("+0x") - 1 + 16;
3532 }
3533 }
3534 }
3535
3536 if (size == 0)
3537 goto free_contents_and_exit;
3538 s = *ret = bfd_malloc (size);
3539 if (s == NULL)
3540 goto free_contents_and_exit_err;
3541
3542 names = (char *) (s + count + plt_count + (resolv_vma != 0));
3543
3544 for (i = secsymend; i < opdsymend; ++i)
3545 {
3546 bfd_vma ent;
3547
3548 if (syms[i]->value > opd->size - 8)
3549 continue;
3550
3551 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3552 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3553 {
3554 long lo, hi;
3555 size_t len;
3556 asection *sec = abfd->sections;
3557
3558 *s = *syms[i];
3559 lo = codesecsym;
3560 hi = codesecsymend;
3561 while (lo < hi)
3562 {
3563 long mid = (lo + hi) >> 1;
3564 if (syms[mid]->section->vma < ent)
3565 lo = mid + 1;
3566 else if (syms[mid]->section->vma > ent)
3567 hi = mid;
3568 else
3569 {
3570 sec = syms[mid]->section;
3571 break;
3572 }
3573 }
3574
3575 if (lo >= hi && lo > codesecsym)
3576 sec = syms[lo - 1]->section;
3577
3578 for (; sec != NULL; sec = sec->next)
3579 {
3580 if (sec->vma > ent)
3581 break;
3582 /* SEC_LOAD may not be set if SEC is from a separate debug
3583 info file. */
3584 if ((sec->flags & SEC_ALLOC) == 0)
3585 break;
3586 if ((sec->flags & SEC_CODE) != 0)
3587 s->section = sec;
3588 }
3589 s->flags |= BSF_SYNTHETIC;
3590 s->value = ent - s->section->vma;
3591 s->name = names;
3592 *names++ = '.';
3593 len = strlen (syms[i]->name);
3594 memcpy (names, syms[i]->name, len + 1);
3595 names += len + 1;
3596 /* Have udata.p point back to the original symbol this
3597 synthetic symbol was derived from. */
3598 s->udata.p = syms[i];
3599 s++;
3600 }
3601 }
3602 free (contents);
3603
3604 if (glink != NULL && relplt != NULL)
3605 {
3606 if (resolv_vma)
3607 {
3608 /* Add a symbol for the main glink trampoline. */
3609 memset (s, 0, sizeof *s);
3610 s->the_bfd = abfd;
3611 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3612 s->section = glink;
3613 s->value = resolv_vma - glink->vma;
3614 s->name = names;
3615 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3616 names += sizeof ("__glink_PLTresolve");
3617 s++;
3618 count++;
3619 }
3620
3621 /* FIXME: It would be very much nicer to put sym@plt on the
3622 stub rather than on the glink branch table entry. The
3623 objdump disassembler would then use a sensible symbol
3624 name on plt calls. The difficulty in doing so is
3625 a) finding the stubs, and,
3626 b) matching stubs against plt entries, and,
3627 c) there can be multiple stubs for a given plt entry.
3628
3629 Solving (a) could be done by code scanning, but older
3630 ppc64 binaries used different stubs to current code.
3631 (b) is the tricky one since you need to known the toc
3632 pointer for at least one function that uses a pic stub to
3633 be able to calculate the plt address referenced.
3634 (c) means gdb would need to set multiple breakpoints (or
3635 find the glink branch itself) when setting breakpoints
3636 for pending shared library loads. */
3637 p = relplt->relocation;
3638 for (i = 0; i < plt_count; i++, p++)
3639 {
3640 size_t len;
3641
3642 *s = **p->sym_ptr_ptr;
3643 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
3644 we are defining a symbol, ensure one of them is set. */
3645 if ((s->flags & BSF_LOCAL) == 0)
3646 s->flags |= BSF_GLOBAL;
3647 s->flags |= BSF_SYNTHETIC;
3648 s->section = glink;
3649 s->value = glink_vma - glink->vma;
3650 s->name = names;
3651 s->udata.p = NULL;
3652 len = strlen ((*p->sym_ptr_ptr)->name);
3653 memcpy (names, (*p->sym_ptr_ptr)->name, len);
3654 names += len;
3655 if (p->addend != 0)
3656 {
3657 memcpy (names, "+0x", sizeof ("+0x") - 1);
3658 names += sizeof ("+0x") - 1;
3659 bfd_sprintf_vma (abfd, names, p->addend);
3660 names += strlen (names);
3661 }
3662 memcpy (names, "@plt", sizeof ("@plt"));
3663 names += sizeof ("@plt");
3664 s++;
3665 if (abi < 2)
3666 {
3667 glink_vma += 8;
3668 if (i >= 0x8000)
3669 glink_vma += 4;
3670 }
3671 else
3672 glink_vma += 4;
3673 }
3674 count += plt_count;
3675 }
3676 }
3677
3678 done:
3679 free (syms);
3680 return count;
3681 }
3682 \f
3683 /* The following functions are specific to the ELF linker, while
3684 functions above are used generally. Those named ppc64_elf_* are
3685 called by the main ELF linker code. They appear in this file more
3686 or less in the order in which they are called. eg.
3687 ppc64_elf_check_relocs is called early in the link process,
3688 ppc64_elf_finish_dynamic_sections is one of the last functions
3689 called.
3690
3691 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
3692 functions have both a function code symbol and a function descriptor
3693 symbol. A call to foo in a relocatable object file looks like:
3694
3695 . .text
3696 . x:
3697 . bl .foo
3698 . nop
3699
3700 The function definition in another object file might be:
3701
3702 . .section .opd
3703 . foo: .quad .foo
3704 . .quad .TOC.@tocbase
3705 . .quad 0
3706 .
3707 . .text
3708 . .foo: blr
3709
3710 When the linker resolves the call during a static link, the branch
3711 unsurprisingly just goes to .foo and the .opd information is unused.
3712 If the function definition is in a shared library, things are a little
3713 different: The call goes via a plt call stub, the opd information gets
3714 copied to the plt, and the linker patches the nop.
3715
3716 . x:
3717 . bl .foo_stub
3718 . ld 2,40(1)
3719 .
3720 .
3721 . .foo_stub:
3722 . std 2,40(1) # in practice, the call stub
3723 . addis 11,2,Lfoo@toc@ha # is slightly optimized, but
3724 . addi 11,11,Lfoo@toc@l # this is the general idea
3725 . ld 12,0(11)
3726 . ld 2,8(11)
3727 . mtctr 12
3728 . ld 11,16(11)
3729 . bctr
3730 .
3731 . .section .plt
3732 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
3733
3734 The "reloc ()" notation is supposed to indicate that the linker emits
3735 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
3736 copying.
3737
3738 What are the difficulties here? Well, firstly, the relocations
3739 examined by the linker in check_relocs are against the function code
3740 sym .foo, while the dynamic relocation in the plt is emitted against
3741 the function descriptor symbol, foo. Somewhere along the line, we need
3742 to carefully copy dynamic link information from one symbol to the other.
3743 Secondly, the generic part of the elf linker will make .foo a dynamic
3744 symbol as is normal for most other backends. We need foo dynamic
3745 instead, at least for an application final link. However, when
3746 creating a shared library containing foo, we need to have both symbols
3747 dynamic so that references to .foo are satisfied during the early
3748 stages of linking. Otherwise the linker might decide to pull in a
3749 definition from some other object, eg. a static library.
3750
3751 Update: As of August 2004, we support a new convention. Function
3752 calls may use the function descriptor symbol, ie. "bl foo". This
3753 behaves exactly as "bl .foo". */
3754
3755 /* Of those relocs that might be copied as dynamic relocs, this function
3756 selects those that must be copied when linking a shared library,
3757 even when the symbol is local. */
3758
3759 static int
3760 must_be_dyn_reloc (struct bfd_link_info *info,
3761 enum elf_ppc64_reloc_type r_type)
3762 {
3763 switch (r_type)
3764 {
3765 default:
3766 return 1;
3767
3768 case R_PPC64_REL32:
3769 case R_PPC64_REL64:
3770 case R_PPC64_REL30:
3771 return 0;
3772
3773 case R_PPC64_TPREL16:
3774 case R_PPC64_TPREL16_LO:
3775 case R_PPC64_TPREL16_HI:
3776 case R_PPC64_TPREL16_HA:
3777 case R_PPC64_TPREL16_DS:
3778 case R_PPC64_TPREL16_LO_DS:
3779 case R_PPC64_TPREL16_HIGH:
3780 case R_PPC64_TPREL16_HIGHA:
3781 case R_PPC64_TPREL16_HIGHER:
3782 case R_PPC64_TPREL16_HIGHERA:
3783 case R_PPC64_TPREL16_HIGHEST:
3784 case R_PPC64_TPREL16_HIGHESTA:
3785 case R_PPC64_TPREL64:
3786 return !bfd_link_executable (info);
3787 }
3788 }
3789
3790 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3791 copying dynamic variables from a shared lib into an app's dynbss
3792 section, and instead use a dynamic relocation to point into the
3793 shared lib. With code that gcc generates, it's vital that this be
3794 enabled; In the PowerPC64 ABI, the address of a function is actually
3795 the address of a function descriptor, which resides in the .opd
3796 section. gcc uses the descriptor directly rather than going via the
3797 GOT as some other ABI's do, which means that initialized function
3798 pointers must reference the descriptor. Thus, a function pointer
3799 initialized to the address of a function in a shared library will
3800 either require a copy reloc, or a dynamic reloc. Using a copy reloc
3801 redefines the function descriptor symbol to point to the copy. This
3802 presents a problem as a plt entry for that function is also
3803 initialized from the function descriptor symbol and the copy reloc
3804 may not be initialized first. */
3805 #define ELIMINATE_COPY_RELOCS 1
3806
3807 /* Section name for stubs is the associated section name plus this
3808 string. */
3809 #define STUB_SUFFIX ".stub"
3810
3811 /* Linker stubs.
3812 ppc_stub_long_branch:
3813 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
3814 destination, but a 24 bit branch in a stub section will reach.
3815 . b dest
3816
3817 ppc_stub_plt_branch:
3818 Similar to the above, but a 24 bit branch in the stub section won't
3819 reach its destination.
3820 . addis %r11,%r2,xxx@toc@ha
3821 . ld %r12,xxx@toc@l(%r11)
3822 . mtctr %r12
3823 . bctr
3824
3825 ppc_stub_plt_call:
3826 Used to call a function in a shared library. If it so happens that
3827 the plt entry referenced crosses a 64k boundary, then an extra
3828 "addi %r11,%r11,xxx@toc@l" will be inserted before the "mtctr".
3829 . std %r2,40(%r1)
3830 . addis %r11,%r2,xxx@toc@ha
3831 . ld %r12,xxx+0@toc@l(%r11)
3832 . mtctr %r12
3833 . ld %r2,xxx+8@toc@l(%r11)
3834 . ld %r11,xxx+16@toc@l(%r11)
3835 . bctr
3836
3837 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
3838 code to adjust the value and save r2 to support multiple toc sections.
3839 A ppc_stub_long_branch with an r2 offset looks like:
3840 . std %r2,40(%r1)
3841 . addis %r2,%r2,off@ha
3842 . addi %r2,%r2,off@l
3843 . b dest
3844
3845 A ppc_stub_plt_branch with an r2 offset looks like:
3846 . std %r2,40(%r1)
3847 . addis %r11,%r2,xxx@toc@ha
3848 . ld %r12,xxx@toc@l(%r11)
3849 . addis %r2,%r2,off@ha
3850 . addi %r2,%r2,off@l
3851 . mtctr %r12
3852 . bctr
3853
3854 In cases where the "addis" instruction would add zero, the "addis" is
3855 omitted and following instructions modified slightly in some cases.
3856 */
3857
3858 enum ppc_stub_type {
3859 ppc_stub_none,
3860 ppc_stub_long_branch,
3861 ppc_stub_long_branch_r2off,
3862 ppc_stub_plt_branch,
3863 ppc_stub_plt_branch_r2off,
3864 ppc_stub_plt_call,
3865 ppc_stub_plt_call_r2save,
3866 ppc_stub_global_entry,
3867 ppc_stub_save_res
3868 };
3869
3870 /* Information on stub grouping. */
3871 struct map_stub
3872 {
3873 /* The stub section. */
3874 asection *stub_sec;
3875 /* This is the section to which stubs in the group will be attached. */
3876 asection *link_sec;
3877 /* Next group. */
3878 struct map_stub *next;
3879 /* Whether to emit a copy of register save/restore functions in this
3880 group. */
3881 int needs_save_res;
3882 };
3883
3884 struct ppc_stub_hash_entry {
3885
3886 /* Base hash table entry structure. */
3887 struct bfd_hash_entry root;
3888
3889 enum ppc_stub_type stub_type;
3890
3891 /* Group information. */
3892 struct map_stub *group;
3893
3894 /* Offset within stub_sec of the beginning of this stub. */
3895 bfd_vma stub_offset;
3896
3897 /* Given the symbol's value and its section we can determine its final
3898 value when building the stubs (so the stub knows where to jump. */
3899 bfd_vma target_value;
3900 asection *target_section;
3901
3902 /* The symbol table entry, if any, that this was derived from. */
3903 struct ppc_link_hash_entry *h;
3904 struct plt_entry *plt_ent;
3905
3906 /* Symbol st_other. */
3907 unsigned char other;
3908 };
3909
3910 struct ppc_branch_hash_entry {
3911
3912 /* Base hash table entry structure. */
3913 struct bfd_hash_entry root;
3914
3915 /* Offset within branch lookup table. */
3916 unsigned int offset;
3917
3918 /* Generation marker. */
3919 unsigned int iter;
3920 };
3921
3922 /* Used to track dynamic relocations for local symbols. */
3923 struct ppc_dyn_relocs
3924 {
3925 struct ppc_dyn_relocs *next;
3926
3927 /* The input section of the reloc. */
3928 asection *sec;
3929
3930 /* Total number of relocs copied for the input section. */
3931 unsigned int count : 31;
3932
3933 /* Whether this entry is for STT_GNU_IFUNC symbols. */
3934 unsigned int ifunc : 1;
3935 };
3936
3937 struct ppc_link_hash_entry
3938 {
3939 struct elf_link_hash_entry elf;
3940
3941 union {
3942 /* A pointer to the most recently used stub hash entry against this
3943 symbol. */
3944 struct ppc_stub_hash_entry *stub_cache;
3945
3946 /* A pointer to the next symbol starting with a '.' */
3947 struct ppc_link_hash_entry *next_dot_sym;
3948 } u;
3949
3950 /* Track dynamic relocs copied for this symbol. */
3951 struct elf_dyn_relocs *dyn_relocs;
3952
3953 /* Link between function code and descriptor symbols. */
3954 struct ppc_link_hash_entry *oh;
3955
3956 /* Flag function code and descriptor symbols. */
3957 unsigned int is_func:1;
3958 unsigned int is_func_descriptor:1;
3959 unsigned int fake:1;
3960
3961 /* Whether global opd/toc sym has been adjusted or not.
3962 After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
3963 should be set for all globals defined in any opd/toc section. */
3964 unsigned int adjust_done:1;
3965
3966 /* Set if we twiddled this symbol to weak at some stage. */
3967 unsigned int was_undefined:1;
3968
3969 /* Set if this is an out-of-line register save/restore function,
3970 with non-standard calling convention. */
3971 unsigned int save_res:1;
3972
3973 /* Contexts in which symbol is used in the GOT (or TOC).
3974 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
3975 corresponding relocs are encountered during check_relocs.
3976 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3977 indicate the corresponding GOT entry type is not needed.
3978 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
3979 a TPREL one. We use a separate flag rather than setting TPREL
3980 just for convenience in distinguishing the two cases. */
3981 #define TLS_GD 1 /* GD reloc. */
3982 #define TLS_LD 2 /* LD reloc. */
3983 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3984 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3985 #define TLS_TLS 16 /* Any TLS reloc. */
3986 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
3987 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
3988 #define PLT_IFUNC 128 /* STT_GNU_IFUNC. */
3989 unsigned char tls_mask;
3990 };
3991
3992 /* ppc64 ELF linker hash table. */
3993
3994 struct ppc_link_hash_table
3995 {
3996 struct elf_link_hash_table elf;
3997
3998 /* The stub hash table. */
3999 struct bfd_hash_table stub_hash_table;
4000
4001 /* Another hash table for plt_branch stubs. */
4002 struct bfd_hash_table branch_hash_table;
4003
4004 /* Hash table for function prologue tocsave. */
4005 htab_t tocsave_htab;
4006
4007 /* Various options and other info passed from the linker. */
4008 struct ppc64_elf_params *params;
4009
4010 /* The size of sec_info below. */
4011 unsigned int sec_info_arr_size;
4012
4013 /* Per-section array of extra section info. Done this way rather
4014 than as part of ppc64_elf_section_data so we have the info for
4015 non-ppc64 sections. */
4016 struct
4017 {
4018 /* Along with elf_gp, specifies the TOC pointer used by this section. */
4019 bfd_vma toc_off;
4020
4021 union
4022 {
4023 /* The section group that this section belongs to. */
4024 struct map_stub *group;
4025 /* A temp section list pointer. */
4026 asection *list;
4027 } u;
4028 } *sec_info;
4029
4030 /* Linked list of groups. */
4031 struct map_stub *group;
4032
4033 /* Temp used when calculating TOC pointers. */
4034 bfd_vma toc_curr;
4035 bfd *toc_bfd;
4036 asection *toc_first_sec;
4037
4038 /* Used when adding symbols. */
4039 struct ppc_link_hash_entry *dot_syms;
4040
4041 /* Shortcuts to get to dynamic linker sections. */
4042 asection *dynbss;
4043 asection *relbss;
4044 asection *glink;
4045 asection *sfpr;
4046 asection *brlt;
4047 asection *relbrlt;
4048 asection *glink_eh_frame;
4049
4050 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
4051 struct ppc_link_hash_entry *tls_get_addr;
4052 struct ppc_link_hash_entry *tls_get_addr_fd;
4053
4054 /* The size of reliplt used by got entry relocs. */
4055 bfd_size_type got_reli_size;
4056
4057 /* Statistics. */
4058 unsigned long stub_count[ppc_stub_global_entry];
4059
4060 /* Number of stubs against global syms. */
4061 unsigned long stub_globals;
4062
4063 /* Set if we're linking code with function descriptors. */
4064 unsigned int opd_abi:1;
4065
4066 /* Support for multiple toc sections. */
4067 unsigned int do_multi_toc:1;
4068 unsigned int multi_toc_needed:1;
4069 unsigned int second_toc_pass:1;
4070 unsigned int do_toc_opt:1;
4071
4072 /* Set on error. */
4073 unsigned int stub_error:1;
4074
4075 /* Temp used by ppc64_elf_before_check_relocs. */
4076 unsigned int twiddled_syms:1;
4077
4078 /* Incremented every time we size stubs. */
4079 unsigned int stub_iteration;
4080
4081 /* Small local sym cache. */
4082 struct sym_cache sym_cache;
4083 };
4084
4085 /* Rename some of the generic section flags to better document how they
4086 are used here. */
4087
4088 /* Nonzero if this section has TLS related relocations. */
4089 #define has_tls_reloc sec_flg0
4090
4091 /* Nonzero if this section has a call to __tls_get_addr. */
4092 #define has_tls_get_addr_call sec_flg1
4093
4094 /* Nonzero if this section has any toc or got relocs. */
4095 #define has_toc_reloc sec_flg2
4096
4097 /* Nonzero if this section has a call to another section that uses
4098 the toc or got. */
4099 #define makes_toc_func_call sec_flg3
4100
4101 /* Recursion protection when determining above flag. */
4102 #define call_check_in_progress sec_flg4
4103 #define call_check_done sec_flg5
4104
4105 /* Get the ppc64 ELF linker hash table from a link_info structure. */
4106
4107 #define ppc_hash_table(p) \
4108 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
4109 == PPC64_ELF_DATA ? ((struct ppc_link_hash_table *) ((p)->hash)) : NULL)
4110
4111 #define ppc_stub_hash_lookup(table, string, create, copy) \
4112 ((struct ppc_stub_hash_entry *) \
4113 bfd_hash_lookup ((table), (string), (create), (copy)))
4114
4115 #define ppc_branch_hash_lookup(table, string, create, copy) \
4116 ((struct ppc_branch_hash_entry *) \
4117 bfd_hash_lookup ((table), (string), (create), (copy)))
4118
4119 /* Create an entry in the stub hash table. */
4120
4121 static struct bfd_hash_entry *
4122 stub_hash_newfunc (struct bfd_hash_entry *entry,
4123 struct bfd_hash_table *table,
4124 const char *string)
4125 {
4126 /* Allocate the structure if it has not already been allocated by a
4127 subclass. */
4128 if (entry == NULL)
4129 {
4130 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
4131 if (entry == NULL)
4132 return entry;
4133 }
4134
4135 /* Call the allocation method of the superclass. */
4136 entry = bfd_hash_newfunc (entry, table, string);
4137 if (entry != NULL)
4138 {
4139 struct ppc_stub_hash_entry *eh;
4140
4141 /* Initialize the local fields. */
4142 eh = (struct ppc_stub_hash_entry *) entry;
4143 eh->stub_type = ppc_stub_none;
4144 eh->group = NULL;
4145 eh->stub_offset = 0;
4146 eh->target_value = 0;
4147 eh->target_section = NULL;
4148 eh->h = NULL;
4149 eh->plt_ent = NULL;
4150 eh->other = 0;
4151 }
4152
4153 return entry;
4154 }
4155
4156 /* Create an entry in the branch hash table. */
4157
4158 static struct bfd_hash_entry *
4159 branch_hash_newfunc (struct bfd_hash_entry *entry,
4160 struct bfd_hash_table *table,
4161 const char *string)
4162 {
4163 /* Allocate the structure if it has not already been allocated by a
4164 subclass. */
4165 if (entry == NULL)
4166 {
4167 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
4168 if (entry == NULL)
4169 return entry;
4170 }
4171
4172 /* Call the allocation method of the superclass. */
4173 entry = bfd_hash_newfunc (entry, table, string);
4174 if (entry != NULL)
4175 {
4176 struct ppc_branch_hash_entry *eh;
4177
4178 /* Initialize the local fields. */
4179 eh = (struct ppc_branch_hash_entry *) entry;
4180 eh->offset = 0;
4181 eh->iter = 0;
4182 }
4183
4184 return entry;
4185 }
4186
4187 /* Create an entry in a ppc64 ELF linker hash table. */
4188
4189 static struct bfd_hash_entry *
4190 link_hash_newfunc (struct bfd_hash_entry *entry,
4191 struct bfd_hash_table *table,
4192 const char *string)
4193 {
4194 /* Allocate the structure if it has not already been allocated by a
4195 subclass. */
4196 if (entry == NULL)
4197 {
4198 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
4199 if (entry == NULL)
4200 return entry;
4201 }
4202
4203 /* Call the allocation method of the superclass. */
4204 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
4205 if (entry != NULL)
4206 {
4207 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
4208
4209 memset (&eh->u.stub_cache, 0,
4210 (sizeof (struct ppc_link_hash_entry)
4211 - offsetof (struct ppc_link_hash_entry, u.stub_cache)));
4212
4213 /* When making function calls, old ABI code references function entry
4214 points (dot symbols), while new ABI code references the function
4215 descriptor symbol. We need to make any combination of reference and
4216 definition work together, without breaking archive linking.
4217
4218 For a defined function "foo" and an undefined call to "bar":
4219 An old object defines "foo" and ".foo", references ".bar" (possibly
4220 "bar" too).
4221 A new object defines "foo" and references "bar".
4222
4223 A new object thus has no problem with its undefined symbols being
4224 satisfied by definitions in an old object. On the other hand, the
4225 old object won't have ".bar" satisfied by a new object.
4226
4227 Keep a list of newly added dot-symbols. */
4228
4229 if (string[0] == '.')
4230 {
4231 struct ppc_link_hash_table *htab;
4232
4233 htab = (struct ppc_link_hash_table *) table;
4234 eh->u.next_dot_sym = htab->dot_syms;
4235 htab->dot_syms = eh;
4236 }
4237 }
4238
4239 return entry;
4240 }
4241
4242 struct tocsave_entry {
4243 asection *sec;
4244 bfd_vma offset;
4245 };
4246
4247 static hashval_t
4248 tocsave_htab_hash (const void *p)
4249 {
4250 const struct tocsave_entry *e = (const struct tocsave_entry *) p;
4251 return ((bfd_vma)(intptr_t) e->sec ^ e->offset) >> 3;
4252 }
4253
4254 static int
4255 tocsave_htab_eq (const void *p1, const void *p2)
4256 {
4257 const struct tocsave_entry *e1 = (const struct tocsave_entry *) p1;
4258 const struct tocsave_entry *e2 = (const struct tocsave_entry *) p2;
4259 return e1->sec == e2->sec && e1->offset == e2->offset;
4260 }
4261
4262 /* Destroy a ppc64 ELF linker hash table. */
4263
4264 static void
4265 ppc64_elf_link_hash_table_free (bfd *obfd)
4266 {
4267 struct ppc_link_hash_table *htab;
4268
4269 htab = (struct ppc_link_hash_table *) obfd->link.hash;
4270 if (htab->tocsave_htab)
4271 htab_delete (htab->tocsave_htab);
4272 bfd_hash_table_free (&htab->branch_hash_table);
4273 bfd_hash_table_free (&htab->stub_hash_table);
4274 _bfd_elf_link_hash_table_free (obfd);
4275 }
4276
4277 /* Create a ppc64 ELF linker hash table. */
4278
4279 static struct bfd_link_hash_table *
4280 ppc64_elf_link_hash_table_create (bfd *abfd)
4281 {
4282 struct ppc_link_hash_table *htab;
4283 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
4284
4285 htab = bfd_zmalloc (amt);
4286 if (htab == NULL)
4287 return NULL;
4288
4289 if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc,
4290 sizeof (struct ppc_link_hash_entry),
4291 PPC64_ELF_DATA))
4292 {
4293 free (htab);
4294 return NULL;
4295 }
4296
4297 /* Init the stub hash table too. */
4298 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc,
4299 sizeof (struct ppc_stub_hash_entry)))
4300 {
4301 _bfd_elf_link_hash_table_free (abfd);
4302 return NULL;
4303 }
4304
4305 /* And the branch hash table. */
4306 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc,
4307 sizeof (struct ppc_branch_hash_entry)))
4308 {
4309 bfd_hash_table_free (&htab->stub_hash_table);
4310 _bfd_elf_link_hash_table_free (abfd);
4311 return NULL;
4312 }
4313
4314 htab->tocsave_htab = htab_try_create (1024,
4315 tocsave_htab_hash,
4316 tocsave_htab_eq,
4317 NULL);
4318 if (htab->tocsave_htab == NULL)
4319 {
4320 ppc64_elf_link_hash_table_free (abfd);
4321 return NULL;
4322 }
4323 htab->elf.root.hash_table_free = ppc64_elf_link_hash_table_free;
4324
4325 /* Initializing two fields of the union is just cosmetic. We really
4326 only care about glist, but when compiled on a 32-bit host the
4327 bfd_vma fields are larger. Setting the bfd_vma to zero makes
4328 debugger inspection of these fields look nicer. */
4329 htab->elf.init_got_refcount.refcount = 0;
4330 htab->elf.init_got_refcount.glist = NULL;
4331 htab->elf.init_plt_refcount.refcount = 0;
4332 htab->elf.init_plt_refcount.glist = NULL;
4333 htab->elf.init_got_offset.offset = 0;
4334 htab->elf.init_got_offset.glist = NULL;
4335 htab->elf.init_plt_offset.offset = 0;
4336 htab->elf.init_plt_offset.glist = NULL;
4337
4338 return &htab->elf.root;
4339 }
4340
4341 /* Create sections for linker generated code. */
4342
4343 static bfd_boolean
4344 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
4345 {
4346 struct ppc_link_hash_table *htab;
4347 flagword flags;
4348
4349 htab = ppc_hash_table (info);
4350
4351 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
4352 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4353 if (htab->params->save_restore_funcs)
4354 {
4355 /* Create .sfpr for code to save and restore fp regs. */
4356 htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr",
4357 flags);
4358 if (htab->sfpr == NULL
4359 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
4360 return FALSE;
4361 }
4362
4363 if (bfd_link_relocatable (info))
4364 return TRUE;
4365
4366 /* Create .glink for lazy dynamic linking support. */
4367 htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink",
4368 flags);
4369 if (htab->glink == NULL
4370 || ! bfd_set_section_alignment (dynobj, htab->glink, 3))
4371 return FALSE;
4372
4373 if (!info->no_ld_generated_unwind_info)
4374 {
4375 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
4376 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4377 htab->glink_eh_frame = bfd_make_section_anyway_with_flags (dynobj,
4378 ".eh_frame",
4379 flags);
4380 if (htab->glink_eh_frame == NULL
4381 || !bfd_set_section_alignment (dynobj, htab->glink_eh_frame, 2))
4382 return FALSE;
4383 }
4384
4385 flags = SEC_ALLOC | SEC_LINKER_CREATED;
4386 htab->elf.iplt = bfd_make_section_anyway_with_flags (dynobj, ".iplt", flags);
4387 if (htab->elf.iplt == NULL
4388 || ! bfd_set_section_alignment (dynobj, htab->elf.iplt, 3))
4389 return FALSE;
4390
4391 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4392 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4393 htab->elf.irelplt
4394 = bfd_make_section_anyway_with_flags (dynobj, ".rela.iplt", flags);
4395 if (htab->elf.irelplt == NULL
4396 || ! bfd_set_section_alignment (dynobj, htab->elf.irelplt, 3))
4397 return FALSE;
4398
4399 /* Create branch lookup table for plt_branch stubs. */
4400 flags = (SEC_ALLOC | SEC_LOAD
4401 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4402 htab->brlt = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt",
4403 flags);
4404 if (htab->brlt == NULL
4405 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
4406 return FALSE;
4407
4408 if (!bfd_link_pic (info))
4409 return TRUE;
4410
4411 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4412 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4413 htab->relbrlt = bfd_make_section_anyway_with_flags (dynobj,
4414 ".rela.branch_lt",
4415 flags);
4416 if (htab->relbrlt == NULL
4417 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
4418 return FALSE;
4419
4420 return TRUE;
4421 }
4422
4423 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
4424
4425 bfd_boolean
4426 ppc64_elf_init_stub_bfd (struct bfd_link_info *info,
4427 struct ppc64_elf_params *params)
4428 {
4429 struct ppc_link_hash_table *htab;
4430
4431 elf_elfheader (params->stub_bfd)->e_ident[EI_CLASS] = ELFCLASS64;
4432
4433 /* Always hook our dynamic sections into the first bfd, which is the
4434 linker created stub bfd. This ensures that the GOT header is at
4435 the start of the output TOC section. */
4436 htab = ppc_hash_table (info);
4437 htab->elf.dynobj = params->stub_bfd;
4438 htab->params = params;
4439
4440 return create_linkage_sections (htab->elf.dynobj, info);
4441 }
4442
4443 /* Build a name for an entry in the stub hash table. */
4444
4445 static char *
4446 ppc_stub_name (const asection *input_section,
4447 const asection *sym_sec,
4448 const struct ppc_link_hash_entry *h,
4449 const Elf_Internal_Rela *rel)
4450 {
4451 char *stub_name;
4452 ssize_t len;
4453
4454 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
4455 offsets from a sym as a branch target? In fact, we could
4456 probably assume the addend is always zero. */
4457 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
4458
4459 if (h)
4460 {
4461 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
4462 stub_name = bfd_malloc (len);
4463 if (stub_name == NULL)
4464 return stub_name;
4465
4466 len = sprintf (stub_name, "%08x.%s+%x",
4467 input_section->id & 0xffffffff,
4468 h->elf.root.root.string,
4469 (int) rel->r_addend & 0xffffffff);
4470 }
4471 else
4472 {
4473 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
4474 stub_name = bfd_malloc (len);
4475 if (stub_name == NULL)
4476 return stub_name;
4477
4478 len = sprintf (stub_name, "%08x.%x:%x+%x",
4479 input_section->id & 0xffffffff,
4480 sym_sec->id & 0xffffffff,
4481 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
4482 (int) rel->r_addend & 0xffffffff);
4483 }
4484 if (len > 2 && stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
4485 stub_name[len - 2] = 0;
4486 return stub_name;
4487 }
4488
4489 /* Look up an entry in the stub hash. Stub entries are cached because
4490 creating the stub name takes a bit of time. */
4491
4492 static struct ppc_stub_hash_entry *
4493 ppc_get_stub_entry (const asection *input_section,
4494 const asection *sym_sec,
4495 struct ppc_link_hash_entry *h,
4496 const Elf_Internal_Rela *rel,
4497 struct ppc_link_hash_table *htab)
4498 {
4499 struct ppc_stub_hash_entry *stub_entry;
4500 struct map_stub *group;
4501
4502 /* If this input section is part of a group of sections sharing one
4503 stub section, then use the id of the first section in the group.
4504 Stub names need to include a section id, as there may well be
4505 more than one stub used to reach say, printf, and we need to
4506 distinguish between them. */
4507 group = htab->sec_info[input_section->id].u.group;
4508 if (group == NULL)
4509 return NULL;
4510
4511 if (h != NULL && h->u.stub_cache != NULL
4512 && h->u.stub_cache->h == h
4513 && h->u.stub_cache->group == group)
4514 {
4515 stub_entry = h->u.stub_cache;
4516 }
4517 else
4518 {
4519 char *stub_name;
4520
4521 stub_name = ppc_stub_name (group->link_sec, sym_sec, h, rel);
4522 if (stub_name == NULL)
4523 return NULL;
4524
4525 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
4526 stub_name, FALSE, FALSE);
4527 if (h != NULL)
4528 h->u.stub_cache = stub_entry;
4529
4530 free (stub_name);
4531 }
4532
4533 return stub_entry;
4534 }
4535
4536 /* Add a new stub entry to the stub hash. Not all fields of the new
4537 stub entry are initialised. */
4538
4539 static struct ppc_stub_hash_entry *
4540 ppc_add_stub (const char *stub_name,
4541 asection *section,
4542 struct bfd_link_info *info)
4543 {
4544 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4545 struct map_stub *group;
4546 asection *link_sec;
4547 asection *stub_sec;
4548 struct ppc_stub_hash_entry *stub_entry;
4549
4550 group = htab->sec_info[section->id].u.group;
4551 link_sec = group->link_sec;
4552 stub_sec = group->stub_sec;
4553 if (stub_sec == NULL)
4554 {
4555 size_t namelen;
4556 bfd_size_type len;
4557 char *s_name;
4558
4559 namelen = strlen (link_sec->name);
4560 len = namelen + sizeof (STUB_SUFFIX);
4561 s_name = bfd_alloc (htab->params->stub_bfd, len);
4562 if (s_name == NULL)
4563 return NULL;
4564
4565 memcpy (s_name, link_sec->name, namelen);
4566 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
4567 stub_sec = (*htab->params->add_stub_section) (s_name, link_sec);
4568 if (stub_sec == NULL)
4569 return NULL;
4570 group->stub_sec = stub_sec;
4571 }
4572
4573 /* Enter this entry into the linker stub hash table. */
4574 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
4575 TRUE, FALSE);
4576 if (stub_entry == NULL)
4577 {
4578 info->callbacks->einfo (_("%P: %B: cannot create stub entry %s\n"),
4579 section->owner, stub_name);
4580 return NULL;
4581 }
4582
4583 stub_entry->group = group;
4584 stub_entry->stub_offset = 0;
4585 return stub_entry;
4586 }
4587
4588 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
4589 not already done. */
4590
4591 static bfd_boolean
4592 create_got_section (bfd *abfd, struct bfd_link_info *info)
4593 {
4594 asection *got, *relgot;
4595 flagword flags;
4596 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4597
4598 if (!is_ppc64_elf (abfd))
4599 return FALSE;
4600 if (htab == NULL)
4601 return FALSE;
4602
4603 if (!htab->elf.sgot
4604 && !_bfd_elf_create_got_section (htab->elf.dynobj, info))
4605 return FALSE;
4606
4607 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
4608 | SEC_LINKER_CREATED);
4609
4610 got = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
4611 if (!got
4612 || !bfd_set_section_alignment (abfd, got, 3))
4613 return FALSE;
4614
4615 relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got",
4616 flags | SEC_READONLY);
4617 if (!relgot
4618 || ! bfd_set_section_alignment (abfd, relgot, 3))
4619 return FALSE;
4620
4621 ppc64_elf_tdata (abfd)->got = got;
4622 ppc64_elf_tdata (abfd)->relgot = relgot;
4623 return TRUE;
4624 }
4625
4626 /* Create the dynamic sections, and set up shortcuts. */
4627
4628 static bfd_boolean
4629 ppc64_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
4630 {
4631 struct ppc_link_hash_table *htab;
4632
4633 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
4634 return FALSE;
4635
4636 htab = ppc_hash_table (info);
4637 if (htab == NULL)
4638 return FALSE;
4639
4640 htab->dynbss = bfd_get_linker_section (dynobj, ".dynbss");
4641 if (!bfd_link_pic (info))
4642 htab->relbss = bfd_get_linker_section (dynobj, ".rela.bss");
4643
4644 if (!htab->elf.sgot || !htab->elf.splt || !htab->elf.srelplt || !htab->dynbss
4645 || (!bfd_link_pic (info) && !htab->relbss))
4646 abort ();
4647
4648 return TRUE;
4649 }
4650
4651 /* Follow indirect and warning symbol links. */
4652
4653 static inline struct bfd_link_hash_entry *
4654 follow_link (struct bfd_link_hash_entry *h)
4655 {
4656 while (h->type == bfd_link_hash_indirect
4657 || h->type == bfd_link_hash_warning)
4658 h = h->u.i.link;
4659 return h;
4660 }
4661
4662 static inline struct elf_link_hash_entry *
4663 elf_follow_link (struct elf_link_hash_entry *h)
4664 {
4665 return (struct elf_link_hash_entry *) follow_link (&h->root);
4666 }
4667
4668 static inline struct ppc_link_hash_entry *
4669 ppc_follow_link (struct ppc_link_hash_entry *h)
4670 {
4671 return (struct ppc_link_hash_entry *) follow_link (&h->elf.root);
4672 }
4673
4674 /* Merge PLT info on FROM with that on TO. */
4675
4676 static void
4677 move_plt_plist (struct ppc_link_hash_entry *from,
4678 struct ppc_link_hash_entry *to)
4679 {
4680 if (from->elf.plt.plist != NULL)
4681 {
4682 if (to->elf.plt.plist != NULL)
4683 {
4684 struct plt_entry **entp;
4685 struct plt_entry *ent;
4686
4687 for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; )
4688 {
4689 struct plt_entry *dent;
4690
4691 for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next)
4692 if (dent->addend == ent->addend)
4693 {
4694 dent->plt.refcount += ent->plt.refcount;
4695 *entp = ent->next;
4696 break;
4697 }
4698 if (dent == NULL)
4699 entp = &ent->next;
4700 }
4701 *entp = to->elf.plt.plist;
4702 }
4703
4704 to->elf.plt.plist = from->elf.plt.plist;
4705 from->elf.plt.plist = NULL;
4706 }
4707 }
4708
4709 /* Copy the extra info we tack onto an elf_link_hash_entry. */
4710
4711 static void
4712 ppc64_elf_copy_indirect_symbol (struct bfd_link_info *info,
4713 struct elf_link_hash_entry *dir,
4714 struct elf_link_hash_entry *ind)
4715 {
4716 struct ppc_link_hash_entry *edir, *eind;
4717
4718 edir = (struct ppc_link_hash_entry *) dir;
4719 eind = (struct ppc_link_hash_entry *) ind;
4720
4721 edir->is_func |= eind->is_func;
4722 edir->is_func_descriptor |= eind->is_func_descriptor;
4723 edir->tls_mask |= eind->tls_mask;
4724 if (eind->oh != NULL)
4725 edir->oh = ppc_follow_link (eind->oh);
4726
4727 /* If called to transfer flags for a weakdef during processing
4728 of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF.
4729 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
4730 if (!(ELIMINATE_COPY_RELOCS
4731 && eind->elf.root.type != bfd_link_hash_indirect
4732 && edir->elf.dynamic_adjusted))
4733 edir->elf.non_got_ref |= eind->elf.non_got_ref;
4734
4735 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
4736 edir->elf.ref_regular |= eind->elf.ref_regular;
4737 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
4738 edir->elf.needs_plt |= eind->elf.needs_plt;
4739 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed;
4740
4741 /* Copy over any dynamic relocs we may have on the indirect sym. */
4742 if (eind->dyn_relocs != NULL)
4743 {
4744 if (edir->dyn_relocs != NULL)
4745 {
4746 struct elf_dyn_relocs **pp;
4747 struct elf_dyn_relocs *p;
4748
4749 /* Add reloc counts against the indirect sym to the direct sym
4750 list. Merge any entries against the same section. */
4751 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
4752 {
4753 struct elf_dyn_relocs *q;
4754
4755 for (q = edir->dyn_relocs; q != NULL; q = q->next)
4756 if (q->sec == p->sec)
4757 {
4758 q->pc_count += p->pc_count;
4759 q->count += p->count;
4760 *pp = p->next;
4761 break;
4762 }
4763 if (q == NULL)
4764 pp = &p->next;
4765 }
4766 *pp = edir->dyn_relocs;
4767 }
4768
4769 edir->dyn_relocs = eind->dyn_relocs;
4770 eind->dyn_relocs = NULL;
4771 }
4772
4773 /* If we were called to copy over info for a weak sym, that's all.
4774 You might think dyn_relocs need not be copied over; After all,
4775 both syms will be dynamic or both non-dynamic so we're just
4776 moving reloc accounting around. However, ELIMINATE_COPY_RELOCS
4777 code in ppc64_elf_adjust_dynamic_symbol needs to check for
4778 dyn_relocs in read-only sections, and it does so on what is the
4779 DIR sym here. */
4780 if (eind->elf.root.type != bfd_link_hash_indirect)
4781 return;
4782
4783 /* Copy over got entries that we may have already seen to the
4784 symbol which just became indirect. */
4785 if (eind->elf.got.glist != NULL)
4786 {
4787 if (edir->elf.got.glist != NULL)
4788 {
4789 struct got_entry **entp;
4790 struct got_entry *ent;
4791
4792 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
4793 {
4794 struct got_entry *dent;
4795
4796 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
4797 if (dent->addend == ent->addend
4798 && dent->owner == ent->owner
4799 && dent->tls_type == ent->tls_type)
4800 {
4801 dent->got.refcount += ent->got.refcount;
4802 *entp = ent->next;
4803 break;
4804 }
4805 if (dent == NULL)
4806 entp = &ent->next;
4807 }
4808 *entp = edir->elf.got.glist;
4809 }
4810
4811 edir->elf.got.glist = eind->elf.got.glist;
4812 eind->elf.got.glist = NULL;
4813 }
4814
4815 /* And plt entries. */
4816 move_plt_plist (eind, edir);
4817
4818 if (eind->elf.dynindx != -1)
4819 {
4820 if (edir->elf.dynindx != -1)
4821 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4822 edir->elf.dynstr_index);
4823 edir->elf.dynindx = eind->elf.dynindx;
4824 edir->elf.dynstr_index = eind->elf.dynstr_index;
4825 eind->elf.dynindx = -1;
4826 eind->elf.dynstr_index = 0;
4827 }
4828 }
4829
4830 /* Find the function descriptor hash entry from the given function code
4831 hash entry FH. Link the entries via their OH fields. */
4832
4833 static struct ppc_link_hash_entry *
4834 lookup_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
4835 {
4836 struct ppc_link_hash_entry *fdh = fh->oh;
4837
4838 if (fdh == NULL)
4839 {
4840 const char *fd_name = fh->elf.root.root.string + 1;
4841
4842 fdh = (struct ppc_link_hash_entry *)
4843 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
4844 if (fdh == NULL)
4845 return fdh;
4846
4847 fdh->is_func_descriptor = 1;
4848 fdh->oh = fh;
4849 fh->is_func = 1;
4850 fh->oh = fdh;
4851 }
4852
4853 return ppc_follow_link (fdh);
4854 }
4855
4856 /* Make a fake function descriptor sym for the code sym FH. */
4857
4858 static struct ppc_link_hash_entry *
4859 make_fdh (struct bfd_link_info *info,
4860 struct ppc_link_hash_entry *fh)
4861 {
4862 bfd *abfd;
4863 asymbol *newsym;
4864 struct bfd_link_hash_entry *bh;
4865 struct ppc_link_hash_entry *fdh;
4866
4867 abfd = fh->elf.root.u.undef.abfd;
4868 newsym = bfd_make_empty_symbol (abfd);
4869 newsym->name = fh->elf.root.root.string + 1;
4870 newsym->section = bfd_und_section_ptr;
4871 newsym->value = 0;
4872 newsym->flags = BSF_WEAK;
4873
4874 bh = NULL;
4875 if (!_bfd_generic_link_add_one_symbol (info, abfd, newsym->name,
4876 newsym->flags, newsym->section,
4877 newsym->value, NULL, FALSE, FALSE,
4878 &bh))
4879 return NULL;
4880
4881 fdh = (struct ppc_link_hash_entry *) bh;
4882 fdh->elf.non_elf = 0;
4883 fdh->fake = 1;
4884 fdh->is_func_descriptor = 1;
4885 fdh->oh = fh;
4886 fh->is_func = 1;
4887 fh->oh = fdh;
4888 return fdh;
4889 }
4890
4891 /* Fix function descriptor symbols defined in .opd sections to be
4892 function type. */
4893
4894 static bfd_boolean
4895 ppc64_elf_add_symbol_hook (bfd *ibfd,
4896 struct bfd_link_info *info,
4897 Elf_Internal_Sym *isym,
4898 const char **name,
4899 flagword *flags ATTRIBUTE_UNUSED,
4900 asection **sec,
4901 bfd_vma *value)
4902 {
4903 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC
4904 && (ibfd->flags & DYNAMIC) == 0
4905 && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour)
4906 elf_tdata (info->output_bfd)->has_gnu_symbols |= elf_gnu_symbol_ifunc;
4907
4908 if (*sec != NULL
4909 && strcmp ((*sec)->name, ".opd") == 0)
4910 {
4911 asection *code_sec;
4912
4913 if (!(ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC
4914 || ELF_ST_TYPE (isym->st_info) == STT_FUNC))
4915 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
4916
4917 /* If the symbol is a function defined in .opd, and the function
4918 code is in a discarded group, let it appear to be undefined. */
4919 if (!bfd_link_relocatable (info)
4920 && (*sec)->reloc_count != 0
4921 && opd_entry_value (*sec, *value, &code_sec, NULL,
4922 FALSE) != (bfd_vma) -1
4923 && discarded_section (code_sec))
4924 {
4925 *sec = bfd_und_section_ptr;
4926 isym->st_shndx = SHN_UNDEF;
4927 }
4928 }
4929 else if (*sec != NULL
4930 && strcmp ((*sec)->name, ".toc") == 0
4931 && ELF_ST_TYPE (isym->st_info) == STT_OBJECT)
4932 {
4933 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4934 if (htab != NULL)
4935 htab->params->object_in_toc = 1;
4936 }
4937
4938 if ((STO_PPC64_LOCAL_MASK & isym->st_other) != 0)
4939 {
4940 if (abiversion (ibfd) == 0)
4941 set_abiversion (ibfd, 2);
4942 else if (abiversion (ibfd) == 1)
4943 {
4944 info->callbacks->einfo (_("%P: symbol '%s' has invalid st_other"
4945 " for ABI version 1\n"), name);
4946 bfd_set_error (bfd_error_bad_value);
4947 return FALSE;
4948 }
4949 }
4950
4951 return TRUE;
4952 }
4953
4954 /* Merge non-visibility st_other attributes: local entry point. */
4955
4956 static void
4957 ppc64_elf_merge_symbol_attribute (struct elf_link_hash_entry *h,
4958 const Elf_Internal_Sym *isym,
4959 bfd_boolean definition,
4960 bfd_boolean dynamic)
4961 {
4962 if (definition && !dynamic)
4963 h->other = ((isym->st_other & ~ELF_ST_VISIBILITY (-1))
4964 | ELF_ST_VISIBILITY (h->other));
4965 }
4966
4967 /* This function makes an old ABI object reference to ".bar" cause the
4968 inclusion of a new ABI object archive that defines "bar".
4969 NAME is a symbol defined in an archive. Return a symbol in the hash
4970 table that might be satisfied by the archive symbols. */
4971
4972 static struct elf_link_hash_entry *
4973 ppc64_elf_archive_symbol_lookup (bfd *abfd,
4974 struct bfd_link_info *info,
4975 const char *name)
4976 {
4977 struct elf_link_hash_entry *h;
4978 char *dot_name;
4979 size_t len;
4980
4981 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
4982 if (h != NULL
4983 /* Don't return this sym if it is a fake function descriptor
4984 created by add_symbol_adjust. */
4985 && !(h->root.type == bfd_link_hash_undefweak
4986 && ((struct ppc_link_hash_entry *) h)->fake))
4987 return h;
4988
4989 if (name[0] == '.')
4990 return h;
4991
4992 len = strlen (name);
4993 dot_name = bfd_alloc (abfd, len + 2);
4994 if (dot_name == NULL)
4995 return (struct elf_link_hash_entry *) 0 - 1;
4996 dot_name[0] = '.';
4997 memcpy (dot_name + 1, name, len + 1);
4998 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
4999 bfd_release (abfd, dot_name);
5000 return h;
5001 }
5002
5003 /* This function satisfies all old ABI object references to ".bar" if a
5004 new ABI object defines "bar". Well, at least, undefined dot symbols
5005 are made weak. This stops later archive searches from including an
5006 object if we already have a function descriptor definition. It also
5007 prevents the linker complaining about undefined symbols.
5008 We also check and correct mismatched symbol visibility here. The
5009 most restrictive visibility of the function descriptor and the
5010 function entry symbol is used. */
5011
5012 static bfd_boolean
5013 add_symbol_adjust (struct ppc_link_hash_entry *eh, struct bfd_link_info *info)
5014 {
5015 struct ppc_link_hash_table *htab;
5016 struct ppc_link_hash_entry *fdh;
5017
5018 if (eh->elf.root.type == bfd_link_hash_indirect)
5019 return TRUE;
5020
5021 if (eh->elf.root.type == bfd_link_hash_warning)
5022 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
5023
5024 if (eh->elf.root.root.string[0] != '.')
5025 abort ();
5026
5027 htab = ppc_hash_table (info);
5028 if (htab == NULL)
5029 return FALSE;
5030
5031 fdh = lookup_fdh (eh, htab);
5032 if (fdh == NULL)
5033 {
5034 if (!bfd_link_relocatable (info)
5035 && (eh->elf.root.type == bfd_link_hash_undefined
5036 || eh->elf.root.type == bfd_link_hash_undefweak)
5037 && eh->elf.ref_regular)
5038 {
5039 /* Make an undefweak function descriptor sym, which is enough to
5040 pull in an --as-needed shared lib, but won't cause link
5041 errors. Archives are handled elsewhere. */
5042 fdh = make_fdh (info, eh);
5043 if (fdh == NULL)
5044 return FALSE;
5045 fdh->elf.ref_regular = 1;
5046 }
5047 }
5048 else
5049 {
5050 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
5051 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
5052 if (entry_vis < descr_vis)
5053 fdh->elf.other += entry_vis - descr_vis;
5054 else if (entry_vis > descr_vis)
5055 eh->elf.other += descr_vis - entry_vis;
5056
5057 if ((fdh->elf.root.type == bfd_link_hash_defined
5058 || fdh->elf.root.type == bfd_link_hash_defweak)
5059 && eh->elf.root.type == bfd_link_hash_undefined)
5060 {
5061 eh->elf.root.type = bfd_link_hash_undefweak;
5062 eh->was_undefined = 1;
5063 htab->twiddled_syms = 1;
5064 }
5065 }
5066
5067 return TRUE;
5068 }
5069
5070 /* Set up opd section info and abiversion for IBFD, and process list
5071 of dot-symbols we made in link_hash_newfunc. */
5072
5073 static bfd_boolean
5074 ppc64_elf_before_check_relocs (bfd *ibfd, struct bfd_link_info *info)
5075 {
5076 struct ppc_link_hash_table *htab;
5077 struct ppc_link_hash_entry **p, *eh;
5078 asection *opd = bfd_get_section_by_name (ibfd, ".opd");
5079
5080 if (opd != NULL && opd->size != 0)
5081 {
5082 if (abiversion (ibfd) == 0)
5083 set_abiversion (ibfd, 1);
5084 else if (abiversion (ibfd) >= 2)
5085 {
5086 info->callbacks->einfo (_("%P: %B .opd not allowed in ABI"
5087 " version %d\n"),
5088 ibfd, abiversion (ibfd));
5089 bfd_set_error (bfd_error_bad_value);
5090 return FALSE;
5091 }
5092
5093 if ((ibfd->flags & DYNAMIC) == 0
5094 && (opd->flags & SEC_RELOC) != 0
5095 && opd->reloc_count != 0
5096 && !bfd_is_abs_section (opd->output_section))
5097 {
5098 /* Garbage collection needs some extra help with .opd sections.
5099 We don't want to necessarily keep everything referenced by
5100 relocs in .opd, as that would keep all functions. Instead,
5101 if we reference an .opd symbol (a function descriptor), we
5102 want to keep the function code symbol's section. This is
5103 easy for global symbols, but for local syms we need to keep
5104 information about the associated function section. */
5105 bfd_size_type amt;
5106 asection **opd_sym_map;
5107
5108 amt = OPD_NDX (opd->size) * sizeof (*opd_sym_map);
5109 opd_sym_map = bfd_zalloc (ibfd, amt);
5110 if (opd_sym_map == NULL)
5111 return FALSE;
5112 ppc64_elf_section_data (opd)->u.opd.func_sec = opd_sym_map;
5113 BFD_ASSERT (ppc64_elf_section_data (opd)->sec_type == sec_normal);
5114 ppc64_elf_section_data (opd)->sec_type = sec_opd;
5115 }
5116 }
5117
5118 if (!is_ppc64_elf (info->output_bfd))
5119 return TRUE;
5120 htab = ppc_hash_table (info);
5121 if (htab == NULL)
5122 return FALSE;
5123
5124 /* For input files without an explicit abiversion in e_flags
5125 we should have flagged any with symbol st_other bits set
5126 as ELFv1 and above flagged those with .opd as ELFv2.
5127 Set the output abiversion if not yet set, and for any input
5128 still ambiguous, take its abiversion from the output.
5129 Differences in ABI are reported later. */
5130 if (abiversion (info->output_bfd) == 0)
5131 set_abiversion (info->output_bfd, abiversion (ibfd));
5132 else if (abiversion (ibfd) == 0)
5133 set_abiversion (ibfd, abiversion (info->output_bfd));
5134
5135 p = &htab->dot_syms;
5136 while ((eh = *p) != NULL)
5137 {
5138 *p = NULL;
5139 if (&eh->elf == htab->elf.hgot)
5140 ;
5141 else if (htab->elf.hgot == NULL
5142 && strcmp (eh->elf.root.root.string, ".TOC.") == 0)
5143 htab->elf.hgot = &eh->elf;
5144 else if (!add_symbol_adjust (eh, info))
5145 return FALSE;
5146 p = &eh->u.next_dot_sym;
5147 }
5148
5149 /* Clear the list for non-ppc64 input files. */
5150 p = &htab->dot_syms;
5151 while ((eh = *p) != NULL)
5152 {
5153 *p = NULL;
5154 p = &eh->u.next_dot_sym;
5155 }
5156
5157 /* We need to fix the undefs list for any syms we have twiddled to
5158 undefweak. */
5159 if (htab->twiddled_syms)
5160 {
5161 bfd_link_repair_undef_list (&htab->elf.root);
5162 htab->twiddled_syms = 0;
5163 }
5164 return TRUE;
5165 }
5166
5167 /* Undo hash table changes when an --as-needed input file is determined
5168 not to be needed. */
5169
5170 static bfd_boolean
5171 ppc64_elf_notice_as_needed (bfd *ibfd,
5172 struct bfd_link_info *info,
5173 enum notice_asneeded_action act)
5174 {
5175 if (act == notice_not_needed)
5176 {
5177 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5178
5179 if (htab == NULL)
5180 return FALSE;
5181
5182 htab->dot_syms = NULL;
5183 }
5184 return _bfd_elf_notice_as_needed (ibfd, info, act);
5185 }
5186
5187 /* If --just-symbols against a final linked binary, then assume we need
5188 toc adjusting stubs when calling functions defined there. */
5189
5190 static void
5191 ppc64_elf_link_just_syms (asection *sec, struct bfd_link_info *info)
5192 {
5193 if ((sec->flags & SEC_CODE) != 0
5194 && (sec->owner->flags & (EXEC_P | DYNAMIC)) != 0
5195 && is_ppc64_elf (sec->owner))
5196 {
5197 if (abiversion (sec->owner) >= 2
5198 || bfd_get_section_by_name (sec->owner, ".opd") != NULL)
5199 sec->has_toc_reloc = 1;
5200 }
5201 _bfd_elf_link_just_syms (sec, info);
5202 }
5203
5204 static struct plt_entry **
5205 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
5206 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
5207 {
5208 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
5209 struct plt_entry **local_plt;
5210 unsigned char *local_got_tls_masks;
5211
5212 if (local_got_ents == NULL)
5213 {
5214 bfd_size_type size = symtab_hdr->sh_info;
5215
5216 size *= (sizeof (*local_got_ents)
5217 + sizeof (*local_plt)
5218 + sizeof (*local_got_tls_masks));
5219 local_got_ents = bfd_zalloc (abfd, size);
5220 if (local_got_ents == NULL)
5221 return NULL;
5222 elf_local_got_ents (abfd) = local_got_ents;
5223 }
5224
5225 if ((tls_type & (PLT_IFUNC | TLS_EXPLICIT)) == 0)
5226 {
5227 struct got_entry *ent;
5228
5229 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
5230 if (ent->addend == r_addend
5231 && ent->owner == abfd
5232 && ent->tls_type == tls_type)
5233 break;
5234 if (ent == NULL)
5235 {
5236 bfd_size_type amt = sizeof (*ent);
5237 ent = bfd_alloc (abfd, amt);
5238 if (ent == NULL)
5239 return FALSE;
5240 ent->next = local_got_ents[r_symndx];
5241 ent->addend = r_addend;
5242 ent->owner = abfd;
5243 ent->tls_type = tls_type;
5244 ent->is_indirect = FALSE;
5245 ent->got.refcount = 0;
5246 local_got_ents[r_symndx] = ent;
5247 }
5248 ent->got.refcount += 1;
5249 }
5250
5251 local_plt = (struct plt_entry **) (local_got_ents + symtab_hdr->sh_info);
5252 local_got_tls_masks = (unsigned char *) (local_plt + symtab_hdr->sh_info);
5253 local_got_tls_masks[r_symndx] |= tls_type;
5254
5255 return local_plt + r_symndx;
5256 }
5257
5258 static bfd_boolean
5259 update_plt_info (bfd *abfd, struct plt_entry **plist, bfd_vma addend)
5260 {
5261 struct plt_entry *ent;
5262
5263 for (ent = *plist; ent != NULL; ent = ent->next)
5264 if (ent->addend == addend)
5265 break;
5266 if (ent == NULL)
5267 {
5268 bfd_size_type amt = sizeof (*ent);
5269 ent = bfd_alloc (abfd, amt);
5270 if (ent == NULL)
5271 return FALSE;
5272 ent->next = *plist;
5273 ent->addend = addend;
5274 ent->plt.refcount = 0;
5275 *plist = ent;
5276 }
5277 ent->plt.refcount += 1;
5278 return TRUE;
5279 }
5280
5281 static bfd_boolean
5282 is_branch_reloc (enum elf_ppc64_reloc_type r_type)
5283 {
5284 return (r_type == R_PPC64_REL24
5285 || r_type == R_PPC64_REL14
5286 || r_type == R_PPC64_REL14_BRTAKEN
5287 || r_type == R_PPC64_REL14_BRNTAKEN
5288 || r_type == R_PPC64_ADDR24
5289 || r_type == R_PPC64_ADDR14
5290 || r_type == R_PPC64_ADDR14_BRTAKEN
5291 || r_type == R_PPC64_ADDR14_BRNTAKEN);
5292 }
5293
5294 /* Look through the relocs for a section during the first phase, and
5295 calculate needed space in the global offset table, procedure
5296 linkage table, and dynamic reloc sections. */
5297
5298 static bfd_boolean
5299 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
5300 asection *sec, const Elf_Internal_Rela *relocs)
5301 {
5302 struct ppc_link_hash_table *htab;
5303 Elf_Internal_Shdr *symtab_hdr;
5304 struct elf_link_hash_entry **sym_hashes;
5305 const Elf_Internal_Rela *rel;
5306 const Elf_Internal_Rela *rel_end;
5307 asection *sreloc;
5308 asection **opd_sym_map;
5309 struct elf_link_hash_entry *tga, *dottga;
5310
5311 if (bfd_link_relocatable (info))
5312 return TRUE;
5313
5314 /* Don't do anything special with non-loaded, non-alloced sections.
5315 In particular, any relocs in such sections should not affect GOT
5316 and PLT reference counting (ie. we don't allow them to create GOT
5317 or PLT entries), there's no possibility or desire to optimize TLS
5318 relocs, and there's not much point in propagating relocs to shared
5319 libs that the dynamic linker won't relocate. */
5320 if ((sec->flags & SEC_ALLOC) == 0)
5321 return TRUE;
5322
5323 BFD_ASSERT (is_ppc64_elf (abfd));
5324
5325 htab = ppc_hash_table (info);
5326 if (htab == NULL)
5327 return FALSE;
5328
5329 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
5330 FALSE, FALSE, TRUE);
5331 dottga = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
5332 FALSE, FALSE, TRUE);
5333 symtab_hdr = &elf_symtab_hdr (abfd);
5334 sym_hashes = elf_sym_hashes (abfd);
5335 sreloc = NULL;
5336 opd_sym_map = NULL;
5337 if (ppc64_elf_section_data (sec) != NULL
5338 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
5339 opd_sym_map = ppc64_elf_section_data (sec)->u.opd.func_sec;
5340
5341 rel_end = relocs + sec->reloc_count;
5342 for (rel = relocs; rel < rel_end; rel++)
5343 {
5344 unsigned long r_symndx;
5345 struct elf_link_hash_entry *h;
5346 enum elf_ppc64_reloc_type r_type;
5347 int tls_type;
5348 struct _ppc64_elf_section_data *ppc64_sec;
5349 struct plt_entry **ifunc, **plt_list;
5350
5351 r_symndx = ELF64_R_SYM (rel->r_info);
5352 if (r_symndx < symtab_hdr->sh_info)
5353 h = NULL;
5354 else
5355 {
5356 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5357 h = elf_follow_link (h);
5358
5359 /* PR15323, ref flags aren't set for references in the same
5360 object. */
5361 h->root.non_ir_ref = 1;
5362
5363 if (h == htab->elf.hgot)
5364 sec->has_toc_reloc = 1;
5365 }
5366
5367 tls_type = 0;
5368 ifunc = NULL;
5369 if (h != NULL)
5370 {
5371 if (h->type == STT_GNU_IFUNC)
5372 {
5373 h->needs_plt = 1;
5374 ifunc = &h->plt.plist;
5375 }
5376 }
5377 else
5378 {
5379 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5380 abfd, r_symndx);
5381 if (isym == NULL)
5382 return FALSE;
5383
5384 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
5385 {
5386 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
5387 rel->r_addend, PLT_IFUNC);
5388 if (ifunc == NULL)
5389 return FALSE;
5390 }
5391 }
5392
5393 r_type = ELF64_R_TYPE (rel->r_info);
5394 switch (r_type)
5395 {
5396 case R_PPC64_TLSGD:
5397 case R_PPC64_TLSLD:
5398 /* These special tls relocs tie a call to __tls_get_addr with
5399 its parameter symbol. */
5400 break;
5401
5402 case R_PPC64_GOT_TLSLD16:
5403 case R_PPC64_GOT_TLSLD16_LO:
5404 case R_PPC64_GOT_TLSLD16_HI:
5405 case R_PPC64_GOT_TLSLD16_HA:
5406 tls_type = TLS_TLS | TLS_LD;
5407 goto dogottls;
5408
5409 case R_PPC64_GOT_TLSGD16:
5410 case R_PPC64_GOT_TLSGD16_LO:
5411 case R_PPC64_GOT_TLSGD16_HI:
5412 case R_PPC64_GOT_TLSGD16_HA:
5413 tls_type = TLS_TLS | TLS_GD;
5414 goto dogottls;
5415
5416 case R_PPC64_GOT_TPREL16_DS:
5417 case R_PPC64_GOT_TPREL16_LO_DS:
5418 case R_PPC64_GOT_TPREL16_HI:
5419 case R_PPC64_GOT_TPREL16_HA:
5420 if (bfd_link_pic (info))
5421 info->flags |= DF_STATIC_TLS;
5422 tls_type = TLS_TLS | TLS_TPREL;
5423 goto dogottls;
5424
5425 case R_PPC64_GOT_DTPREL16_DS:
5426 case R_PPC64_GOT_DTPREL16_LO_DS:
5427 case R_PPC64_GOT_DTPREL16_HI:
5428 case R_PPC64_GOT_DTPREL16_HA:
5429 tls_type = TLS_TLS | TLS_DTPREL;
5430 dogottls:
5431 sec->has_tls_reloc = 1;
5432 /* Fall thru */
5433
5434 case R_PPC64_GOT16:
5435 case R_PPC64_GOT16_DS:
5436 case R_PPC64_GOT16_HA:
5437 case R_PPC64_GOT16_HI:
5438 case R_PPC64_GOT16_LO:
5439 case R_PPC64_GOT16_LO_DS:
5440 /* This symbol requires a global offset table entry. */
5441 sec->has_toc_reloc = 1;
5442 if (r_type == R_PPC64_GOT_TLSLD16
5443 || r_type == R_PPC64_GOT_TLSGD16
5444 || r_type == R_PPC64_GOT_TPREL16_DS
5445 || r_type == R_PPC64_GOT_DTPREL16_DS
5446 || r_type == R_PPC64_GOT16
5447 || r_type == R_PPC64_GOT16_DS)
5448 {
5449 htab->do_multi_toc = 1;
5450 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5451 }
5452
5453 if (ppc64_elf_tdata (abfd)->got == NULL
5454 && !create_got_section (abfd, info))
5455 return FALSE;
5456
5457 if (h != NULL)
5458 {
5459 struct ppc_link_hash_entry *eh;
5460 struct got_entry *ent;
5461
5462 eh = (struct ppc_link_hash_entry *) h;
5463 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
5464 if (ent->addend == rel->r_addend
5465 && ent->owner == abfd
5466 && ent->tls_type == tls_type)
5467 break;
5468 if (ent == NULL)
5469 {
5470 bfd_size_type amt = sizeof (*ent);
5471 ent = bfd_alloc (abfd, amt);
5472 if (ent == NULL)
5473 return FALSE;
5474 ent->next = eh->elf.got.glist;
5475 ent->addend = rel->r_addend;
5476 ent->owner = abfd;
5477 ent->tls_type = tls_type;
5478 ent->is_indirect = FALSE;
5479 ent->got.refcount = 0;
5480 eh->elf.got.glist = ent;
5481 }
5482 ent->got.refcount += 1;
5483 eh->tls_mask |= tls_type;
5484 }
5485 else
5486 /* This is a global offset table entry for a local symbol. */
5487 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5488 rel->r_addend, tls_type))
5489 return FALSE;
5490
5491 /* We may also need a plt entry if the symbol turns out to be
5492 an ifunc. */
5493 if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1)
5494 {
5495 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5496 return FALSE;
5497 }
5498 break;
5499
5500 case R_PPC64_PLT16_HA:
5501 case R_PPC64_PLT16_HI:
5502 case R_PPC64_PLT16_LO:
5503 case R_PPC64_PLT32:
5504 case R_PPC64_PLT64:
5505 /* This symbol requires a procedure linkage table entry. */
5506 plt_list = ifunc;
5507 if (h != NULL)
5508 {
5509 h->needs_plt = 1;
5510 if (h->root.root.string[0] == '.'
5511 && h->root.root.string[1] != '\0')
5512 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5513 plt_list = &h->plt.plist;
5514 }
5515 if (plt_list == NULL)
5516 {
5517 /* It does not make sense to have a procedure linkage
5518 table entry for a non-ifunc local symbol. */
5519 info->callbacks->einfo
5520 (_("%P: %H: %s reloc against local symbol\n"),
5521 abfd, sec, rel->r_offset,
5522 ppc64_elf_howto_table[r_type]->name);
5523 bfd_set_error (bfd_error_bad_value);
5524 return FALSE;
5525 }
5526 if (!update_plt_info (abfd, plt_list, rel->r_addend))
5527 return FALSE;
5528 break;
5529
5530 /* The following relocations don't need to propagate the
5531 relocation if linking a shared object since they are
5532 section relative. */
5533 case R_PPC64_SECTOFF:
5534 case R_PPC64_SECTOFF_LO:
5535 case R_PPC64_SECTOFF_HI:
5536 case R_PPC64_SECTOFF_HA:
5537 case R_PPC64_SECTOFF_DS:
5538 case R_PPC64_SECTOFF_LO_DS:
5539 case R_PPC64_DTPREL16:
5540 case R_PPC64_DTPREL16_LO:
5541 case R_PPC64_DTPREL16_HI:
5542 case R_PPC64_DTPREL16_HA:
5543 case R_PPC64_DTPREL16_DS:
5544 case R_PPC64_DTPREL16_LO_DS:
5545 case R_PPC64_DTPREL16_HIGH:
5546 case R_PPC64_DTPREL16_HIGHA:
5547 case R_PPC64_DTPREL16_HIGHER:
5548 case R_PPC64_DTPREL16_HIGHERA:
5549 case R_PPC64_DTPREL16_HIGHEST:
5550 case R_PPC64_DTPREL16_HIGHESTA:
5551 break;
5552
5553 /* Nor do these. */
5554 case R_PPC64_REL16:
5555 case R_PPC64_REL16_LO:
5556 case R_PPC64_REL16_HI:
5557 case R_PPC64_REL16_HA:
5558 case R_PPC64_REL16DX_HA:
5559 break;
5560
5561 /* Not supported as a dynamic relocation. */
5562 case R_PPC64_ADDR64_LOCAL:
5563 if (bfd_link_pic (info))
5564 {
5565 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
5566 ppc_howto_init ();
5567 info->callbacks->einfo (_("%P: %H: %s reloc unsupported "
5568 "in shared libraries and PIEs.\n"),
5569 abfd, sec, rel->r_offset,
5570 ppc64_elf_howto_table[r_type]->name);
5571 bfd_set_error (bfd_error_bad_value);
5572 return FALSE;
5573 }
5574 break;
5575
5576 case R_PPC64_TOC16:
5577 case R_PPC64_TOC16_DS:
5578 htab->do_multi_toc = 1;
5579 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5580 case R_PPC64_TOC16_LO:
5581 case R_PPC64_TOC16_HI:
5582 case R_PPC64_TOC16_HA:
5583 case R_PPC64_TOC16_LO_DS:
5584 sec->has_toc_reloc = 1;
5585 break;
5586
5587 /* Marker reloc. */
5588 case R_PPC64_ENTRY:
5589 break;
5590
5591 /* This relocation describes the C++ object vtable hierarchy.
5592 Reconstruct it for later use during GC. */
5593 case R_PPC64_GNU_VTINHERIT:
5594 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
5595 return FALSE;
5596 break;
5597
5598 /* This relocation describes which C++ vtable entries are actually
5599 used. Record for later use during GC. */
5600 case R_PPC64_GNU_VTENTRY:
5601 BFD_ASSERT (h != NULL);
5602 if (h != NULL
5603 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
5604 return FALSE;
5605 break;
5606
5607 case R_PPC64_REL14:
5608 case R_PPC64_REL14_BRTAKEN:
5609 case R_PPC64_REL14_BRNTAKEN:
5610 {
5611 asection *dest = NULL;
5612
5613 /* Heuristic: If jumping outside our section, chances are
5614 we are going to need a stub. */
5615 if (h != NULL)
5616 {
5617 /* If the sym is weak it may be overridden later, so
5618 don't assume we know where a weak sym lives. */
5619 if (h->root.type == bfd_link_hash_defined)
5620 dest = h->root.u.def.section;
5621 }
5622 else
5623 {
5624 Elf_Internal_Sym *isym;
5625
5626 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5627 abfd, r_symndx);
5628 if (isym == NULL)
5629 return FALSE;
5630
5631 dest = bfd_section_from_elf_index (abfd, isym->st_shndx);
5632 }
5633
5634 if (dest != sec)
5635 ppc64_elf_section_data (sec)->has_14bit_branch = 1;
5636 }
5637 /* Fall through. */
5638
5639 case R_PPC64_REL24:
5640 plt_list = ifunc;
5641 if (h != NULL)
5642 {
5643 h->needs_plt = 1;
5644 if (h->root.root.string[0] == '.'
5645 && h->root.root.string[1] != '\0')
5646 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5647
5648 if (h == tga || h == dottga)
5649 {
5650 sec->has_tls_reloc = 1;
5651 if (rel != relocs
5652 && (ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSGD
5653 || ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSLD))
5654 /* We have a new-style __tls_get_addr call with
5655 a marker reloc. */
5656 ;
5657 else
5658 /* Mark this section as having an old-style call. */
5659 sec->has_tls_get_addr_call = 1;
5660 }
5661 plt_list = &h->plt.plist;
5662 }
5663
5664 /* We may need a .plt entry if the function this reloc
5665 refers to is in a shared lib. */
5666 if (plt_list
5667 && !update_plt_info (abfd, plt_list, rel->r_addend))
5668 return FALSE;
5669 break;
5670
5671 case R_PPC64_ADDR14:
5672 case R_PPC64_ADDR14_BRNTAKEN:
5673 case R_PPC64_ADDR14_BRTAKEN:
5674 case R_PPC64_ADDR24:
5675 goto dodyn;
5676
5677 case R_PPC64_TPREL64:
5678 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
5679 if (bfd_link_pic (info))
5680 info->flags |= DF_STATIC_TLS;
5681 goto dotlstoc;
5682
5683 case R_PPC64_DTPMOD64:
5684 if (rel + 1 < rel_end
5685 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
5686 && rel[1].r_offset == rel->r_offset + 8)
5687 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
5688 else
5689 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
5690 goto dotlstoc;
5691
5692 case R_PPC64_DTPREL64:
5693 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
5694 if (rel != relocs
5695 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
5696 && rel[-1].r_offset == rel->r_offset - 8)
5697 /* This is the second reloc of a dtpmod, dtprel pair.
5698 Don't mark with TLS_DTPREL. */
5699 goto dodyn;
5700
5701 dotlstoc:
5702 sec->has_tls_reloc = 1;
5703 if (h != NULL)
5704 {
5705 struct ppc_link_hash_entry *eh;
5706 eh = (struct ppc_link_hash_entry *) h;
5707 eh->tls_mask |= tls_type;
5708 }
5709 else
5710 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5711 rel->r_addend, tls_type))
5712 return FALSE;
5713
5714 ppc64_sec = ppc64_elf_section_data (sec);
5715 if (ppc64_sec->sec_type != sec_toc)
5716 {
5717 bfd_size_type amt;
5718
5719 /* One extra to simplify get_tls_mask. */
5720 amt = sec->size * sizeof (unsigned) / 8 + sizeof (unsigned);
5721 ppc64_sec->u.toc.symndx = bfd_zalloc (abfd, amt);
5722 if (ppc64_sec->u.toc.symndx == NULL)
5723 return FALSE;
5724 amt = sec->size * sizeof (bfd_vma) / 8;
5725 ppc64_sec->u.toc.add = bfd_zalloc (abfd, amt);
5726 if (ppc64_sec->u.toc.add == NULL)
5727 return FALSE;
5728 BFD_ASSERT (ppc64_sec->sec_type == sec_normal);
5729 ppc64_sec->sec_type = sec_toc;
5730 }
5731 BFD_ASSERT (rel->r_offset % 8 == 0);
5732 ppc64_sec->u.toc.symndx[rel->r_offset / 8] = r_symndx;
5733 ppc64_sec->u.toc.add[rel->r_offset / 8] = rel->r_addend;
5734
5735 /* Mark the second slot of a GD or LD entry.
5736 -1 to indicate GD and -2 to indicate LD. */
5737 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
5738 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -1;
5739 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
5740 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -2;
5741 goto dodyn;
5742
5743 case R_PPC64_TPREL16:
5744 case R_PPC64_TPREL16_LO:
5745 case R_PPC64_TPREL16_HI:
5746 case R_PPC64_TPREL16_HA:
5747 case R_PPC64_TPREL16_DS:
5748 case R_PPC64_TPREL16_LO_DS:
5749 case R_PPC64_TPREL16_HIGH:
5750 case R_PPC64_TPREL16_HIGHA:
5751 case R_PPC64_TPREL16_HIGHER:
5752 case R_PPC64_TPREL16_HIGHERA:
5753 case R_PPC64_TPREL16_HIGHEST:
5754 case R_PPC64_TPREL16_HIGHESTA:
5755 if (bfd_link_pic (info))
5756 {
5757 info->flags |= DF_STATIC_TLS;
5758 goto dodyn;
5759 }
5760 break;
5761
5762 case R_PPC64_ADDR64:
5763 if (opd_sym_map != NULL
5764 && rel + 1 < rel_end
5765 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
5766 {
5767 if (h != NULL)
5768 {
5769 if (h->root.root.string[0] == '.'
5770 && h->root.root.string[1] != 0
5771 && lookup_fdh ((struct ppc_link_hash_entry *) h, htab))
5772 ;
5773 else
5774 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5775 }
5776 else
5777 {
5778 asection *s;
5779 Elf_Internal_Sym *isym;
5780
5781 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5782 abfd, r_symndx);
5783 if (isym == NULL)
5784 return FALSE;
5785
5786 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5787 if (s != NULL && s != sec)
5788 opd_sym_map[OPD_NDX (rel->r_offset)] = s;
5789 }
5790 }
5791 /* Fall through. */
5792
5793 case R_PPC64_ADDR16:
5794 case R_PPC64_ADDR16_DS:
5795 case R_PPC64_ADDR16_HA:
5796 case R_PPC64_ADDR16_HI:
5797 case R_PPC64_ADDR16_HIGH:
5798 case R_PPC64_ADDR16_HIGHA:
5799 case R_PPC64_ADDR16_HIGHER:
5800 case R_PPC64_ADDR16_HIGHERA:
5801 case R_PPC64_ADDR16_HIGHEST:
5802 case R_PPC64_ADDR16_HIGHESTA:
5803 case R_PPC64_ADDR16_LO:
5804 case R_PPC64_ADDR16_LO_DS:
5805 if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1
5806 && rel->r_addend == 0)
5807 {
5808 /* We may need a .plt entry if this reloc refers to a
5809 function in a shared lib. */
5810 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5811 return FALSE;
5812 h->pointer_equality_needed = 1;
5813 }
5814 /* Fall through. */
5815
5816 case R_PPC64_REL30:
5817 case R_PPC64_REL32:
5818 case R_PPC64_REL64:
5819 case R_PPC64_ADDR32:
5820 case R_PPC64_UADDR16:
5821 case R_PPC64_UADDR32:
5822 case R_PPC64_UADDR64:
5823 case R_PPC64_TOC:
5824 if (h != NULL && !bfd_link_pic (info))
5825 /* We may need a copy reloc. */
5826 h->non_got_ref = 1;
5827
5828 /* Don't propagate .opd relocs. */
5829 if (NO_OPD_RELOCS && opd_sym_map != NULL)
5830 break;
5831
5832 /* If we are creating a shared library, and this is a reloc
5833 against a global symbol, or a non PC relative reloc
5834 against a local symbol, then we need to copy the reloc
5835 into the shared library. However, if we are linking with
5836 -Bsymbolic, we do not need to copy a reloc against a
5837 global symbol which is defined in an object we are
5838 including in the link (i.e., DEF_REGULAR is set). At
5839 this point we have not seen all the input files, so it is
5840 possible that DEF_REGULAR is not set now but will be set
5841 later (it is never cleared). In case of a weak definition,
5842 DEF_REGULAR may be cleared later by a strong definition in
5843 a shared library. We account for that possibility below by
5844 storing information in the dyn_relocs field of the hash
5845 table entry. A similar situation occurs when creating
5846 shared libraries and symbol visibility changes render the
5847 symbol local.
5848
5849 If on the other hand, we are creating an executable, we
5850 may need to keep relocations for symbols satisfied by a
5851 dynamic library if we manage to avoid copy relocs for the
5852 symbol. */
5853 dodyn:
5854 if ((bfd_link_pic (info)
5855 && (must_be_dyn_reloc (info, r_type)
5856 || (h != NULL
5857 && (!SYMBOLIC_BIND (info, h)
5858 || h->root.type == bfd_link_hash_defweak
5859 || !h->def_regular))))
5860 || (ELIMINATE_COPY_RELOCS
5861 && !bfd_link_pic (info)
5862 && h != NULL
5863 && (h->root.type == bfd_link_hash_defweak
5864 || !h->def_regular))
5865 || (!bfd_link_pic (info)
5866 && ifunc != NULL))
5867 {
5868 /* We must copy these reloc types into the output file.
5869 Create a reloc section in dynobj and make room for
5870 this reloc. */
5871 if (sreloc == NULL)
5872 {
5873 sreloc = _bfd_elf_make_dynamic_reloc_section
5874 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
5875
5876 if (sreloc == NULL)
5877 return FALSE;
5878 }
5879
5880 /* If this is a global symbol, we count the number of
5881 relocations we need for this symbol. */
5882 if (h != NULL)
5883 {
5884 struct elf_dyn_relocs *p;
5885 struct elf_dyn_relocs **head;
5886
5887 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
5888 p = *head;
5889 if (p == NULL || p->sec != sec)
5890 {
5891 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5892 if (p == NULL)
5893 return FALSE;
5894 p->next = *head;
5895 *head = p;
5896 p->sec = sec;
5897 p->count = 0;
5898 p->pc_count = 0;
5899 }
5900 p->count += 1;
5901 if (!must_be_dyn_reloc (info, r_type))
5902 p->pc_count += 1;
5903 }
5904 else
5905 {
5906 /* Track dynamic relocs needed for local syms too.
5907 We really need local syms available to do this
5908 easily. Oh well. */
5909 struct ppc_dyn_relocs *p;
5910 struct ppc_dyn_relocs **head;
5911 bfd_boolean is_ifunc;
5912 asection *s;
5913 void *vpp;
5914 Elf_Internal_Sym *isym;
5915
5916 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5917 abfd, r_symndx);
5918 if (isym == NULL)
5919 return FALSE;
5920
5921 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5922 if (s == NULL)
5923 s = sec;
5924
5925 vpp = &elf_section_data (s)->local_dynrel;
5926 head = (struct ppc_dyn_relocs **) vpp;
5927 is_ifunc = ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC;
5928 p = *head;
5929 if (p != NULL && p->sec == sec && p->ifunc != is_ifunc)
5930 p = p->next;
5931 if (p == NULL || p->sec != sec || p->ifunc != is_ifunc)
5932 {
5933 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5934 if (p == NULL)
5935 return FALSE;
5936 p->next = *head;
5937 *head = p;
5938 p->sec = sec;
5939 p->ifunc = is_ifunc;
5940 p->count = 0;
5941 }
5942 p->count += 1;
5943 }
5944 }
5945 break;
5946
5947 default:
5948 break;
5949 }
5950 }
5951
5952 return TRUE;
5953 }
5954
5955 /* Merge backend specific data from an object file to the output
5956 object file when linking. */
5957
5958 static bfd_boolean
5959 ppc64_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
5960 {
5961 unsigned long iflags, oflags;
5962
5963 if ((ibfd->flags & BFD_LINKER_CREATED) != 0)
5964 return TRUE;
5965
5966 if (!is_ppc64_elf (ibfd) || !is_ppc64_elf (obfd))
5967 return TRUE;
5968
5969 if (!_bfd_generic_verify_endian_match (ibfd, obfd))
5970 return FALSE;
5971
5972 iflags = elf_elfheader (ibfd)->e_flags;
5973 oflags = elf_elfheader (obfd)->e_flags;
5974
5975 if (iflags & ~EF_PPC64_ABI)
5976 {
5977 (*_bfd_error_handler)
5978 (_("%B uses unknown e_flags 0x%lx"), ibfd, iflags);
5979 bfd_set_error (bfd_error_bad_value);
5980 return FALSE;
5981 }
5982 else if (iflags != oflags && iflags != 0)
5983 {
5984 (*_bfd_error_handler)
5985 (_("%B: ABI version %ld is not compatible with ABI version %ld output"),
5986 ibfd, iflags, oflags);
5987 bfd_set_error (bfd_error_bad_value);
5988 return FALSE;
5989 }
5990
5991 /* Merge Tag_compatibility attributes and any common GNU ones. */
5992 _bfd_elf_merge_object_attributes (ibfd, obfd);
5993
5994 return TRUE;
5995 }
5996
5997 static bfd_boolean
5998 ppc64_elf_print_private_bfd_data (bfd *abfd, void *ptr)
5999 {
6000 /* Print normal ELF private data. */
6001 _bfd_elf_print_private_bfd_data (abfd, ptr);
6002
6003 if (elf_elfheader (abfd)->e_flags != 0)
6004 {
6005 FILE *file = ptr;
6006
6007 /* xgettext:c-format */
6008 fprintf (file, _("private flags = 0x%lx:"),
6009 elf_elfheader (abfd)->e_flags);
6010
6011 if ((elf_elfheader (abfd)->e_flags & EF_PPC64_ABI) != 0)
6012 fprintf (file, _(" [abiv%ld]"),
6013 elf_elfheader (abfd)->e_flags & EF_PPC64_ABI);
6014 fputc ('\n', file);
6015 }
6016
6017 return TRUE;
6018 }
6019
6020 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
6021 of the code entry point, and its section, which must be in the same
6022 object as OPD_SEC. Returns (bfd_vma) -1 on error. */
6023
6024 static bfd_vma
6025 opd_entry_value (asection *opd_sec,
6026 bfd_vma offset,
6027 asection **code_sec,
6028 bfd_vma *code_off,
6029 bfd_boolean in_code_sec)
6030 {
6031 bfd *opd_bfd = opd_sec->owner;
6032 Elf_Internal_Rela *relocs;
6033 Elf_Internal_Rela *lo, *hi, *look;
6034 bfd_vma val;
6035
6036 /* No relocs implies we are linking a --just-symbols object, or looking
6037 at a final linked executable with addr2line or somesuch. */
6038 if (opd_sec->reloc_count == 0)
6039 {
6040 bfd_byte *contents = ppc64_elf_tdata (opd_bfd)->opd.contents;
6041
6042 if (contents == NULL)
6043 {
6044 if (!bfd_malloc_and_get_section (opd_bfd, opd_sec, &contents))
6045 return (bfd_vma) -1;
6046 ppc64_elf_tdata (opd_bfd)->opd.contents = contents;
6047 }
6048
6049 /* PR 17512: file: 64b9dfbb. */
6050 if (offset + 7 >= opd_sec->size || offset + 7 < offset)
6051 return (bfd_vma) -1;
6052
6053 val = bfd_get_64 (opd_bfd, contents + offset);
6054 if (code_sec != NULL)
6055 {
6056 asection *sec, *likely = NULL;
6057
6058 if (in_code_sec)
6059 {
6060 sec = *code_sec;
6061 if (sec->vma <= val
6062 && val < sec->vma + sec->size)
6063 likely = sec;
6064 else
6065 val = -1;
6066 }
6067 else
6068 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
6069 if (sec->vma <= val
6070 && (sec->flags & SEC_LOAD) != 0
6071 && (sec->flags & SEC_ALLOC) != 0)
6072 likely = sec;
6073 if (likely != NULL)
6074 {
6075 *code_sec = likely;
6076 if (code_off != NULL)
6077 *code_off = val - likely->vma;
6078 }
6079 }
6080 return val;
6081 }
6082
6083 BFD_ASSERT (is_ppc64_elf (opd_bfd));
6084
6085 relocs = ppc64_elf_tdata (opd_bfd)->opd.relocs;
6086 if (relocs == NULL)
6087 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
6088 /* PR 17512: file: df8e1fd6. */
6089 if (relocs == NULL)
6090 return (bfd_vma) -1;
6091
6092 /* Go find the opd reloc at the sym address. */
6093 lo = relocs;
6094 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
6095 val = (bfd_vma) -1;
6096 while (lo < hi)
6097 {
6098 look = lo + (hi - lo) / 2;
6099 if (look->r_offset < offset)
6100 lo = look + 1;
6101 else if (look->r_offset > offset)
6102 hi = look;
6103 else
6104 {
6105 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (opd_bfd);
6106
6107 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
6108 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
6109 {
6110 unsigned long symndx = ELF64_R_SYM (look->r_info);
6111 asection *sec = NULL;
6112
6113 if (symndx >= symtab_hdr->sh_info
6114 && elf_sym_hashes (opd_bfd) != NULL)
6115 {
6116 struct elf_link_hash_entry **sym_hashes;
6117 struct elf_link_hash_entry *rh;
6118
6119 sym_hashes = elf_sym_hashes (opd_bfd);
6120 rh = sym_hashes[symndx - symtab_hdr->sh_info];
6121 if (rh != NULL)
6122 {
6123 rh = elf_follow_link (rh);
6124 if (rh->root.type != bfd_link_hash_defined
6125 && rh->root.type != bfd_link_hash_defweak)
6126 break;
6127 if (rh->root.u.def.section->owner == opd_bfd)
6128 {
6129 val = rh->root.u.def.value;
6130 sec = rh->root.u.def.section;
6131 }
6132 }
6133 }
6134
6135 if (sec == NULL)
6136 {
6137 Elf_Internal_Sym *sym;
6138
6139 if (symndx < symtab_hdr->sh_info)
6140 {
6141 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
6142 if (sym == NULL)
6143 {
6144 size_t symcnt = symtab_hdr->sh_info;
6145 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
6146 symcnt, 0,
6147 NULL, NULL, NULL);
6148 if (sym == NULL)
6149 break;
6150 symtab_hdr->contents = (bfd_byte *) sym;
6151 }
6152 sym += symndx;
6153 }
6154 else
6155 {
6156 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
6157 1, symndx,
6158 NULL, NULL, NULL);
6159 if (sym == NULL)
6160 break;
6161 }
6162 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
6163 if (sec == NULL)
6164 break;
6165 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
6166 val = sym->st_value;
6167 }
6168
6169 val += look->r_addend;
6170 if (code_off != NULL)
6171 *code_off = val;
6172 if (code_sec != NULL)
6173 {
6174 if (in_code_sec && *code_sec != sec)
6175 return -1;
6176 else
6177 *code_sec = sec;
6178 }
6179 if (sec->output_section != NULL)
6180 val += sec->output_section->vma + sec->output_offset;
6181 }
6182 break;
6183 }
6184 }
6185
6186 return val;
6187 }
6188
6189 /* If the ELF symbol SYM might be a function in SEC, return the
6190 function size and set *CODE_OFF to the function's entry point,
6191 otherwise return zero. */
6192
6193 static bfd_size_type
6194 ppc64_elf_maybe_function_sym (const asymbol *sym, asection *sec,
6195 bfd_vma *code_off)
6196 {
6197 bfd_size_type size;
6198
6199 if ((sym->flags & (BSF_SECTION_SYM | BSF_FILE | BSF_OBJECT
6200 | BSF_THREAD_LOCAL | BSF_RELC | BSF_SRELC)) != 0)
6201 return 0;
6202
6203 size = 0;
6204 if (!(sym->flags & BSF_SYNTHETIC))
6205 size = ((elf_symbol_type *) sym)->internal_elf_sym.st_size;
6206
6207 if (strcmp (sym->section->name, ".opd") == 0)
6208 {
6209 struct _opd_sec_data *opd = get_opd_info (sym->section);
6210 bfd_vma symval = sym->value;
6211
6212 if (opd != NULL
6213 && opd->adjust != NULL
6214 && elf_section_data (sym->section)->relocs != NULL)
6215 {
6216 /* opd_entry_value will use cached relocs that have been
6217 adjusted, but with raw symbols. That means both local
6218 and global symbols need adjusting. */
6219 long adjust = opd->adjust[OPD_NDX (symval)];
6220 if (adjust == -1)
6221 return 0;
6222 symval += adjust;
6223 }
6224
6225 if (opd_entry_value (sym->section, symval,
6226 &sec, code_off, TRUE) == (bfd_vma) -1)
6227 return 0;
6228 /* An old ABI binary with dot-syms has a size of 24 on the .opd
6229 symbol. This size has nothing to do with the code size of the
6230 function, which is what we're supposed to return, but the
6231 code size isn't available without looking up the dot-sym.
6232 However, doing that would be a waste of time particularly
6233 since elf_find_function will look at the dot-sym anyway.
6234 Now, elf_find_function will keep the largest size of any
6235 function sym found at the code address of interest, so return
6236 1 here to avoid it incorrectly caching a larger function size
6237 for a small function. This does mean we return the wrong
6238 size for a new-ABI function of size 24, but all that does is
6239 disable caching for such functions. */
6240 if (size == 24)
6241 size = 1;
6242 }
6243 else
6244 {
6245 if (sym->section != sec)
6246 return 0;
6247 *code_off = sym->value;
6248 }
6249 if (size == 0)
6250 size = 1;
6251 return size;
6252 }
6253
6254 /* Return true if symbol is defined in a regular object file. */
6255
6256 static bfd_boolean
6257 is_static_defined (struct elf_link_hash_entry *h)
6258 {
6259 return ((h->root.type == bfd_link_hash_defined
6260 || h->root.type == bfd_link_hash_defweak)
6261 && h->root.u.def.section != NULL
6262 && h->root.u.def.section->output_section != NULL);
6263 }
6264
6265 /* If FDH is a function descriptor symbol, return the associated code
6266 entry symbol if it is defined. Return NULL otherwise. */
6267
6268 static struct ppc_link_hash_entry *
6269 defined_code_entry (struct ppc_link_hash_entry *fdh)
6270 {
6271 if (fdh->is_func_descriptor)
6272 {
6273 struct ppc_link_hash_entry *fh = ppc_follow_link (fdh->oh);
6274 if (fh->elf.root.type == bfd_link_hash_defined
6275 || fh->elf.root.type == bfd_link_hash_defweak)
6276 return fh;
6277 }
6278 return NULL;
6279 }
6280
6281 /* If FH is a function code entry symbol, return the associated
6282 function descriptor symbol if it is defined. Return NULL otherwise. */
6283
6284 static struct ppc_link_hash_entry *
6285 defined_func_desc (struct ppc_link_hash_entry *fh)
6286 {
6287 if (fh->oh != NULL
6288 && fh->oh->is_func_descriptor)
6289 {
6290 struct ppc_link_hash_entry *fdh = ppc_follow_link (fh->oh);
6291 if (fdh->elf.root.type == bfd_link_hash_defined
6292 || fdh->elf.root.type == bfd_link_hash_defweak)
6293 return fdh;
6294 }
6295 return NULL;
6296 }
6297
6298 /* Mark all our entry sym sections, both opd and code section. */
6299
6300 static void
6301 ppc64_elf_gc_keep (struct bfd_link_info *info)
6302 {
6303 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6304 struct bfd_sym_chain *sym;
6305
6306 if (htab == NULL)
6307 return;
6308
6309 for (sym = info->gc_sym_list; sym != NULL; sym = sym->next)
6310 {
6311 struct ppc_link_hash_entry *eh, *fh;
6312 asection *sec;
6313
6314 eh = (struct ppc_link_hash_entry *)
6315 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, TRUE);
6316 if (eh == NULL)
6317 continue;
6318 if (eh->elf.root.type != bfd_link_hash_defined
6319 && eh->elf.root.type != bfd_link_hash_defweak)
6320 continue;
6321
6322 fh = defined_code_entry (eh);
6323 if (fh != NULL)
6324 {
6325 sec = fh->elf.root.u.def.section;
6326 sec->flags |= SEC_KEEP;
6327 }
6328 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6329 && opd_entry_value (eh->elf.root.u.def.section,
6330 eh->elf.root.u.def.value,
6331 &sec, NULL, FALSE) != (bfd_vma) -1)
6332 sec->flags |= SEC_KEEP;
6333
6334 sec = eh->elf.root.u.def.section;
6335 sec->flags |= SEC_KEEP;
6336 }
6337 }
6338
6339 /* Mark sections containing dynamically referenced symbols. When
6340 building shared libraries, we must assume that any visible symbol is
6341 referenced. */
6342
6343 static bfd_boolean
6344 ppc64_elf_gc_mark_dynamic_ref (struct elf_link_hash_entry *h, void *inf)
6345 {
6346 struct bfd_link_info *info = (struct bfd_link_info *) inf;
6347 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
6348 struct ppc_link_hash_entry *fdh;
6349 struct bfd_elf_dynamic_list *d = info->dynamic_list;
6350
6351 /* Dynamic linking info is on the func descriptor sym. */
6352 fdh = defined_func_desc (eh);
6353 if (fdh != NULL)
6354 eh = fdh;
6355
6356 if ((eh->elf.root.type == bfd_link_hash_defined
6357 || eh->elf.root.type == bfd_link_hash_defweak)
6358 && (eh->elf.ref_dynamic
6359 || ((eh->elf.def_regular || ELF_COMMON_DEF_P (&eh->elf))
6360 && ELF_ST_VISIBILITY (eh->elf.other) != STV_INTERNAL
6361 && ELF_ST_VISIBILITY (eh->elf.other) != STV_HIDDEN
6362 && (!bfd_link_executable (info)
6363 || info->export_dynamic
6364 || (eh->elf.dynamic
6365 && d != NULL
6366 && (*d->match) (&d->head, NULL, eh->elf.root.root.string)))
6367 && (strchr (eh->elf.root.root.string, ELF_VER_CHR) != NULL
6368 || !bfd_hide_sym_by_version (info->version_info,
6369 eh->elf.root.root.string)))))
6370 {
6371 asection *code_sec;
6372 struct ppc_link_hash_entry *fh;
6373
6374 eh->elf.root.u.def.section->flags |= SEC_KEEP;
6375
6376 /* Function descriptor syms cause the associated
6377 function code sym section to be marked. */
6378 fh = defined_code_entry (eh);
6379 if (fh != NULL)
6380 {
6381 code_sec = fh->elf.root.u.def.section;
6382 code_sec->flags |= SEC_KEEP;
6383 }
6384 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6385 && opd_entry_value (eh->elf.root.u.def.section,
6386 eh->elf.root.u.def.value,
6387 &code_sec, NULL, FALSE) != (bfd_vma) -1)
6388 code_sec->flags |= SEC_KEEP;
6389 }
6390
6391 return TRUE;
6392 }
6393
6394 /* Return the section that should be marked against GC for a given
6395 relocation. */
6396
6397 static asection *
6398 ppc64_elf_gc_mark_hook (asection *sec,
6399 struct bfd_link_info *info,
6400 Elf_Internal_Rela *rel,
6401 struct elf_link_hash_entry *h,
6402 Elf_Internal_Sym *sym)
6403 {
6404 asection *rsec;
6405
6406 /* Syms return NULL if we're marking .opd, so we avoid marking all
6407 function sections, as all functions are referenced in .opd. */
6408 rsec = NULL;
6409 if (get_opd_info (sec) != NULL)
6410 return rsec;
6411
6412 if (h != NULL)
6413 {
6414 enum elf_ppc64_reloc_type r_type;
6415 struct ppc_link_hash_entry *eh, *fh, *fdh;
6416
6417 r_type = ELF64_R_TYPE (rel->r_info);
6418 switch (r_type)
6419 {
6420 case R_PPC64_GNU_VTINHERIT:
6421 case R_PPC64_GNU_VTENTRY:
6422 break;
6423
6424 default:
6425 switch (h->root.type)
6426 {
6427 case bfd_link_hash_defined:
6428 case bfd_link_hash_defweak:
6429 eh = (struct ppc_link_hash_entry *) h;
6430 fdh = defined_func_desc (eh);
6431 if (fdh != NULL)
6432 eh = fdh;
6433
6434 /* Function descriptor syms cause the associated
6435 function code sym section to be marked. */
6436 fh = defined_code_entry (eh);
6437 if (fh != NULL)
6438 {
6439 /* They also mark their opd section. */
6440 eh->elf.root.u.def.section->gc_mark = 1;
6441
6442 rsec = fh->elf.root.u.def.section;
6443 }
6444 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6445 && opd_entry_value (eh->elf.root.u.def.section,
6446 eh->elf.root.u.def.value,
6447 &rsec, NULL, FALSE) != (bfd_vma) -1)
6448 eh->elf.root.u.def.section->gc_mark = 1;
6449 else
6450 rsec = h->root.u.def.section;
6451 break;
6452
6453 case bfd_link_hash_common:
6454 rsec = h->root.u.c.p->section;
6455 break;
6456
6457 default:
6458 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
6459 }
6460 }
6461 }
6462 else
6463 {
6464 struct _opd_sec_data *opd;
6465
6466 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
6467 opd = get_opd_info (rsec);
6468 if (opd != NULL && opd->func_sec != NULL)
6469 {
6470 rsec->gc_mark = 1;
6471
6472 rsec = opd->func_sec[OPD_NDX (sym->st_value + rel->r_addend)];
6473 }
6474 }
6475
6476 return rsec;
6477 }
6478
6479 /* Update the .got, .plt. and dynamic reloc reference counts for the
6480 section being removed. */
6481
6482 static bfd_boolean
6483 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
6484 asection *sec, const Elf_Internal_Rela *relocs)
6485 {
6486 struct ppc_link_hash_table *htab;
6487 Elf_Internal_Shdr *symtab_hdr;
6488 struct elf_link_hash_entry **sym_hashes;
6489 struct got_entry **local_got_ents;
6490 const Elf_Internal_Rela *rel, *relend;
6491
6492 if (bfd_link_relocatable (info))
6493 return TRUE;
6494
6495 if ((sec->flags & SEC_ALLOC) == 0)
6496 return TRUE;
6497
6498 elf_section_data (sec)->local_dynrel = NULL;
6499
6500 htab = ppc_hash_table (info);
6501 if (htab == NULL)
6502 return FALSE;
6503
6504 symtab_hdr = &elf_symtab_hdr (abfd);
6505 sym_hashes = elf_sym_hashes (abfd);
6506 local_got_ents = elf_local_got_ents (abfd);
6507
6508 relend = relocs + sec->reloc_count;
6509 for (rel = relocs; rel < relend; rel++)
6510 {
6511 unsigned long r_symndx;
6512 enum elf_ppc64_reloc_type r_type;
6513 struct elf_link_hash_entry *h = NULL;
6514 struct plt_entry **plt_list;
6515 unsigned char tls_type = 0;
6516
6517 r_symndx = ELF64_R_SYM (rel->r_info);
6518 r_type = ELF64_R_TYPE (rel->r_info);
6519 if (r_symndx >= symtab_hdr->sh_info)
6520 {
6521 struct ppc_link_hash_entry *eh;
6522 struct elf_dyn_relocs **pp;
6523 struct elf_dyn_relocs *p;
6524
6525 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
6526 h = elf_follow_link (h);
6527 eh = (struct ppc_link_hash_entry *) h;
6528
6529 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
6530 if (p->sec == sec)
6531 {
6532 /* Everything must go for SEC. */
6533 *pp = p->next;
6534 break;
6535 }
6536 }
6537
6538 switch (r_type)
6539 {
6540 case R_PPC64_GOT_TLSLD16:
6541 case R_PPC64_GOT_TLSLD16_LO:
6542 case R_PPC64_GOT_TLSLD16_HI:
6543 case R_PPC64_GOT_TLSLD16_HA:
6544 tls_type = TLS_TLS | TLS_LD;
6545 goto dogot;
6546
6547 case R_PPC64_GOT_TLSGD16:
6548 case R_PPC64_GOT_TLSGD16_LO:
6549 case R_PPC64_GOT_TLSGD16_HI:
6550 case R_PPC64_GOT_TLSGD16_HA:
6551 tls_type = TLS_TLS | TLS_GD;
6552 goto dogot;
6553
6554 case R_PPC64_GOT_TPREL16_DS:
6555 case R_PPC64_GOT_TPREL16_LO_DS:
6556 case R_PPC64_GOT_TPREL16_HI:
6557 case R_PPC64_GOT_TPREL16_HA:
6558 tls_type = TLS_TLS | TLS_TPREL;
6559 goto dogot;
6560
6561 case R_PPC64_GOT_DTPREL16_DS:
6562 case R_PPC64_GOT_DTPREL16_LO_DS:
6563 case R_PPC64_GOT_DTPREL16_HI:
6564 case R_PPC64_GOT_DTPREL16_HA:
6565 tls_type = TLS_TLS | TLS_DTPREL;
6566 goto dogot;
6567
6568 case R_PPC64_GOT16:
6569 case R_PPC64_GOT16_DS:
6570 case R_PPC64_GOT16_HA:
6571 case R_PPC64_GOT16_HI:
6572 case R_PPC64_GOT16_LO:
6573 case R_PPC64_GOT16_LO_DS:
6574 dogot:
6575 {
6576 struct got_entry *ent;
6577
6578 if (h != NULL)
6579 ent = h->got.glist;
6580 else
6581 ent = local_got_ents[r_symndx];
6582
6583 for (; ent != NULL; ent = ent->next)
6584 if (ent->addend == rel->r_addend
6585 && ent->owner == abfd
6586 && ent->tls_type == tls_type)
6587 break;
6588 if (ent == NULL)
6589 abort ();
6590 if (ent->got.refcount > 0)
6591 ent->got.refcount -= 1;
6592 }
6593 break;
6594
6595 case R_PPC64_PLT16_HA:
6596 case R_PPC64_PLT16_HI:
6597 case R_PPC64_PLT16_LO:
6598 case R_PPC64_PLT32:
6599 case R_PPC64_PLT64:
6600 case R_PPC64_REL14:
6601 case R_PPC64_REL14_BRNTAKEN:
6602 case R_PPC64_REL14_BRTAKEN:
6603 case R_PPC64_REL24:
6604 plt_list = NULL;
6605 if (h != NULL)
6606 plt_list = &h->plt.plist;
6607 else if (local_got_ents != NULL)
6608 {
6609 struct plt_entry **local_plt = (struct plt_entry **)
6610 (local_got_ents + symtab_hdr->sh_info);
6611 unsigned char *local_got_tls_masks = (unsigned char *)
6612 (local_plt + symtab_hdr->sh_info);
6613 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
6614 plt_list = local_plt + r_symndx;
6615 }
6616 if (plt_list)
6617 {
6618 struct plt_entry *ent;
6619
6620 for (ent = *plt_list; ent != NULL; ent = ent->next)
6621 if (ent->addend == rel->r_addend)
6622 break;
6623 if (ent != NULL && ent->plt.refcount > 0)
6624 ent->plt.refcount -= 1;
6625 }
6626 break;
6627
6628 default:
6629 break;
6630 }
6631 }
6632 return TRUE;
6633 }
6634
6635 /* The maximum size of .sfpr. */
6636 #define SFPR_MAX (218*4)
6637
6638 struct sfpr_def_parms
6639 {
6640 const char name[12];
6641 unsigned char lo, hi;
6642 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
6643 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
6644 };
6645
6646 /* Auto-generate _save*, _rest* functions in .sfpr.
6647 If STUB_SEC is non-null, define alias symbols in STUB_SEC
6648 instead. */
6649
6650 static bfd_boolean
6651 sfpr_define (struct bfd_link_info *info,
6652 const struct sfpr_def_parms *parm,
6653 asection *stub_sec)
6654 {
6655 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6656 unsigned int i;
6657 size_t len = strlen (parm->name);
6658 bfd_boolean writing = FALSE;
6659 char sym[16];
6660
6661 if (htab == NULL)
6662 return FALSE;
6663
6664 memcpy (sym, parm->name, len);
6665 sym[len + 2] = 0;
6666
6667 for (i = parm->lo; i <= parm->hi; i++)
6668 {
6669 struct ppc_link_hash_entry *h;
6670
6671 sym[len + 0] = i / 10 + '0';
6672 sym[len + 1] = i % 10 + '0';
6673 h = (struct ppc_link_hash_entry *)
6674 elf_link_hash_lookup (&htab->elf, sym, writing, TRUE, TRUE);
6675 if (stub_sec != NULL)
6676 {
6677 if (h != NULL
6678 && h->elf.root.type == bfd_link_hash_defined
6679 && h->elf.root.u.def.section == htab->sfpr)
6680 {
6681 struct elf_link_hash_entry *s;
6682 char buf[32];
6683 sprintf (buf, "%08x.%s", stub_sec->id & 0xffffffff, sym);
6684 s = elf_link_hash_lookup (&htab->elf, buf, TRUE, TRUE, FALSE);
6685 if (s == NULL)
6686 return FALSE;
6687 if (s->root.type == bfd_link_hash_new
6688 || (s->root.type = bfd_link_hash_defined
6689 && s->root.u.def.section == stub_sec))
6690 {
6691 s->root.type = bfd_link_hash_defined;
6692 s->root.u.def.section = stub_sec;
6693 s->root.u.def.value = (stub_sec->size
6694 + h->elf.root.u.def.value);
6695 s->ref_regular = 1;
6696 s->def_regular = 1;
6697 s->ref_regular_nonweak = 1;
6698 s->forced_local = 1;
6699 s->non_elf = 0;
6700 s->root.linker_def = 1;
6701 }
6702 }
6703 continue;
6704 }
6705 if (h != NULL)
6706 {
6707 h->save_res = 1;
6708 if (!h->elf.def_regular)
6709 {
6710 h->elf.root.type = bfd_link_hash_defined;
6711 h->elf.root.u.def.section = htab->sfpr;
6712 h->elf.root.u.def.value = htab->sfpr->size;
6713 h->elf.type = STT_FUNC;
6714 h->elf.def_regular = 1;
6715 h->elf.non_elf = 0;
6716 _bfd_elf_link_hash_hide_symbol (info, &h->elf, TRUE);
6717 writing = TRUE;
6718 if (htab->sfpr->contents == NULL)
6719 {
6720 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
6721 if (htab->sfpr->contents == NULL)
6722 return FALSE;
6723 }
6724 }
6725 }
6726 if (writing)
6727 {
6728 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
6729 if (i != parm->hi)
6730 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
6731 else
6732 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
6733 htab->sfpr->size = p - htab->sfpr->contents;
6734 }
6735 }
6736
6737 return TRUE;
6738 }
6739
6740 static bfd_byte *
6741 savegpr0 (bfd *abfd, bfd_byte *p, int r)
6742 {
6743 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6744 return p + 4;
6745 }
6746
6747 static bfd_byte *
6748 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
6749 {
6750 p = savegpr0 (abfd, p, r);
6751 bfd_put_32 (abfd, STD_R0_0R1 + STK_LR, p);
6752 p = p + 4;
6753 bfd_put_32 (abfd, BLR, p);
6754 return p + 4;
6755 }
6756
6757 static bfd_byte *
6758 restgpr0 (bfd *abfd, bfd_byte *p, int r)
6759 {
6760 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6761 return p + 4;
6762 }
6763
6764 static bfd_byte *
6765 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
6766 {
6767 bfd_put_32 (abfd, LD_R0_0R1 + STK_LR, p);
6768 p = p + 4;
6769 p = restgpr0 (abfd, p, r);
6770 bfd_put_32 (abfd, MTLR_R0, p);
6771 p = p + 4;
6772 if (r == 29)
6773 {
6774 p = restgpr0 (abfd, p, 30);
6775 p = restgpr0 (abfd, p, 31);
6776 }
6777 bfd_put_32 (abfd, BLR, p);
6778 return p + 4;
6779 }
6780
6781 static bfd_byte *
6782 savegpr1 (bfd *abfd, bfd_byte *p, int r)
6783 {
6784 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6785 return p + 4;
6786 }
6787
6788 static bfd_byte *
6789 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
6790 {
6791 p = savegpr1 (abfd, p, r);
6792 bfd_put_32 (abfd, BLR, p);
6793 return p + 4;
6794 }
6795
6796 static bfd_byte *
6797 restgpr1 (bfd *abfd, bfd_byte *p, int r)
6798 {
6799 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6800 return p + 4;
6801 }
6802
6803 static bfd_byte *
6804 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
6805 {
6806 p = restgpr1 (abfd, p, r);
6807 bfd_put_32 (abfd, BLR, p);
6808 return p + 4;
6809 }
6810
6811 static bfd_byte *
6812 savefpr (bfd *abfd, bfd_byte *p, int r)
6813 {
6814 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6815 return p + 4;
6816 }
6817
6818 static bfd_byte *
6819 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
6820 {
6821 p = savefpr (abfd, p, r);
6822 bfd_put_32 (abfd, STD_R0_0R1 + STK_LR, p);
6823 p = p + 4;
6824 bfd_put_32 (abfd, BLR, p);
6825 return p + 4;
6826 }
6827
6828 static bfd_byte *
6829 restfpr (bfd *abfd, bfd_byte *p, int r)
6830 {
6831 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6832 return p + 4;
6833 }
6834
6835 static bfd_byte *
6836 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
6837 {
6838 bfd_put_32 (abfd, LD_R0_0R1 + STK_LR, p);
6839 p = p + 4;
6840 p = restfpr (abfd, p, r);
6841 bfd_put_32 (abfd, MTLR_R0, p);
6842 p = p + 4;
6843 if (r == 29)
6844 {
6845 p = restfpr (abfd, p, 30);
6846 p = restfpr (abfd, p, 31);
6847 }
6848 bfd_put_32 (abfd, BLR, p);
6849 return p + 4;
6850 }
6851
6852 static bfd_byte *
6853 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
6854 {
6855 p = savefpr (abfd, p, r);
6856 bfd_put_32 (abfd, BLR, p);
6857 return p + 4;
6858 }
6859
6860 static bfd_byte *
6861 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
6862 {
6863 p = restfpr (abfd, p, r);
6864 bfd_put_32 (abfd, BLR, p);
6865 return p + 4;
6866 }
6867
6868 static bfd_byte *
6869 savevr (bfd *abfd, bfd_byte *p, int r)
6870 {
6871 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6872 p = p + 4;
6873 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
6874 return p + 4;
6875 }
6876
6877 static bfd_byte *
6878 savevr_tail (bfd *abfd, bfd_byte *p, int r)
6879 {
6880 p = savevr (abfd, p, r);
6881 bfd_put_32 (abfd, BLR, p);
6882 return p + 4;
6883 }
6884
6885 static bfd_byte *
6886 restvr (bfd *abfd, bfd_byte *p, int r)
6887 {
6888 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6889 p = p + 4;
6890 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
6891 return p + 4;
6892 }
6893
6894 static bfd_byte *
6895 restvr_tail (bfd *abfd, bfd_byte *p, int r)
6896 {
6897 p = restvr (abfd, p, r);
6898 bfd_put_32 (abfd, BLR, p);
6899 return p + 4;
6900 }
6901
6902 /* Called via elf_link_hash_traverse to transfer dynamic linking
6903 information on function code symbol entries to their corresponding
6904 function descriptor symbol entries. */
6905
6906 static bfd_boolean
6907 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
6908 {
6909 struct bfd_link_info *info;
6910 struct ppc_link_hash_table *htab;
6911 struct plt_entry *ent;
6912 struct ppc_link_hash_entry *fh;
6913 struct ppc_link_hash_entry *fdh;
6914 bfd_boolean force_local;
6915
6916 fh = (struct ppc_link_hash_entry *) h;
6917 if (fh->elf.root.type == bfd_link_hash_indirect)
6918 return TRUE;
6919
6920 info = inf;
6921 htab = ppc_hash_table (info);
6922 if (htab == NULL)
6923 return FALSE;
6924
6925 /* Resolve undefined references to dot-symbols as the value
6926 in the function descriptor, if we have one in a regular object.
6927 This is to satisfy cases like ".quad .foo". Calls to functions
6928 in dynamic objects are handled elsewhere. */
6929 if (fh->elf.root.type == bfd_link_hash_undefweak
6930 && fh->was_undefined
6931 && (fdh = defined_func_desc (fh)) != NULL
6932 && get_opd_info (fdh->elf.root.u.def.section) != NULL
6933 && opd_entry_value (fdh->elf.root.u.def.section,
6934 fdh->elf.root.u.def.value,
6935 &fh->elf.root.u.def.section,
6936 &fh->elf.root.u.def.value, FALSE) != (bfd_vma) -1)
6937 {
6938 fh->elf.root.type = fdh->elf.root.type;
6939 fh->elf.forced_local = 1;
6940 fh->elf.def_regular = fdh->elf.def_regular;
6941 fh->elf.def_dynamic = fdh->elf.def_dynamic;
6942 }
6943
6944 /* If this is a function code symbol, transfer dynamic linking
6945 information to the function descriptor symbol. */
6946 if (!fh->is_func)
6947 return TRUE;
6948
6949 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
6950 if (ent->plt.refcount > 0)
6951 break;
6952 if (ent == NULL
6953 || fh->elf.root.root.string[0] != '.'
6954 || fh->elf.root.root.string[1] == '\0')
6955 return TRUE;
6956
6957 /* Find the corresponding function descriptor symbol. Create it
6958 as undefined if necessary. */
6959
6960 fdh = lookup_fdh (fh, htab);
6961 if (fdh == NULL
6962 && !bfd_link_executable (info)
6963 && (fh->elf.root.type == bfd_link_hash_undefined
6964 || fh->elf.root.type == bfd_link_hash_undefweak))
6965 {
6966 fdh = make_fdh (info, fh);
6967 if (fdh == NULL)
6968 return FALSE;
6969 }
6970
6971 /* Fake function descriptors are made undefweak. If the function
6972 code symbol is strong undefined, make the fake sym the same.
6973 If the function code symbol is defined, then force the fake
6974 descriptor local; We can't support overriding of symbols in a
6975 shared library on a fake descriptor. */
6976
6977 if (fdh != NULL
6978 && fdh->fake
6979 && fdh->elf.root.type == bfd_link_hash_undefweak)
6980 {
6981 if (fh->elf.root.type == bfd_link_hash_undefined)
6982 {
6983 fdh->elf.root.type = bfd_link_hash_undefined;
6984 bfd_link_add_undef (&htab->elf.root, &fdh->elf.root);
6985 }
6986 else if (fh->elf.root.type == bfd_link_hash_defined
6987 || fh->elf.root.type == bfd_link_hash_defweak)
6988 {
6989 _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE);
6990 }
6991 }
6992
6993 if (fdh != NULL
6994 && !fdh->elf.forced_local
6995 && (!bfd_link_executable (info)
6996 || fdh->elf.def_dynamic
6997 || fdh->elf.ref_dynamic
6998 || (fdh->elf.root.type == bfd_link_hash_undefweak
6999 && ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT)))
7000 {
7001 if (fdh->elf.dynindx == -1)
7002 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
7003 return FALSE;
7004 fdh->elf.ref_regular |= fh->elf.ref_regular;
7005 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
7006 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
7007 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
7008 if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT)
7009 {
7010 move_plt_plist (fh, fdh);
7011 fdh->elf.needs_plt = 1;
7012 }
7013 fdh->is_func_descriptor = 1;
7014 fdh->oh = fh;
7015 fh->oh = fdh;
7016 }
7017
7018 /* Now that the info is on the function descriptor, clear the
7019 function code sym info. Any function code syms for which we
7020 don't have a definition in a regular file, we force local.
7021 This prevents a shared library from exporting syms that have
7022 been imported from another library. Function code syms that
7023 are really in the library we must leave global to prevent the
7024 linker dragging in a definition from a static library. */
7025 force_local = (!fh->elf.def_regular
7026 || fdh == NULL
7027 || !fdh->elf.def_regular
7028 || fdh->elf.forced_local);
7029 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
7030
7031 return TRUE;
7032 }
7033
7034 static const struct sfpr_def_parms save_res_funcs[] =
7035 {
7036 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
7037 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
7038 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
7039 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
7040 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
7041 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
7042 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
7043 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
7044 { "._savef", 14, 31, savefpr, savefpr1_tail },
7045 { "._restf", 14, 31, restfpr, restfpr1_tail },
7046 { "_savevr_", 20, 31, savevr, savevr_tail },
7047 { "_restvr_", 20, 31, restvr, restvr_tail }
7048 };
7049
7050 /* Called near the start of bfd_elf_size_dynamic_sections. We use
7051 this hook to a) provide some gcc support functions, and b) transfer
7052 dynamic linking information gathered so far on function code symbol
7053 entries, to their corresponding function descriptor symbol entries. */
7054
7055 static bfd_boolean
7056 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
7057 struct bfd_link_info *info)
7058 {
7059 struct ppc_link_hash_table *htab;
7060
7061 htab = ppc_hash_table (info);
7062 if (htab == NULL)
7063 return FALSE;
7064
7065 /* Provide any missing _save* and _rest* functions. */
7066 if (htab->sfpr != NULL)
7067 {
7068 unsigned int i;
7069
7070 htab->sfpr->size = 0;
7071 for (i = 0; i < ARRAY_SIZE (save_res_funcs); i++)
7072 if (!sfpr_define (info, &save_res_funcs[i], NULL))
7073 return FALSE;
7074 if (htab->sfpr->size == 0)
7075 htab->sfpr->flags |= SEC_EXCLUDE;
7076 }
7077
7078 if (bfd_link_relocatable (info))
7079 return TRUE;
7080
7081 if (htab->elf.hgot != NULL)
7082 {
7083 _bfd_elf_link_hash_hide_symbol (info, htab->elf.hgot, TRUE);
7084 /* Make .TOC. defined so as to prevent it being made dynamic.
7085 The wrong value here is fixed later in ppc64_elf_set_toc. */
7086 if (!htab->elf.hgot->def_regular
7087 || htab->elf.hgot->root.type != bfd_link_hash_defined)
7088 {
7089 htab->elf.hgot->root.type = bfd_link_hash_defined;
7090 htab->elf.hgot->root.u.def.value = 0;
7091 htab->elf.hgot->root.u.def.section = bfd_abs_section_ptr;
7092 htab->elf.hgot->def_regular = 1;
7093 htab->elf.hgot->root.linker_def = 1;
7094 }
7095 htab->elf.hgot->type = STT_OBJECT;
7096 htab->elf.hgot->other = ((htab->elf.hgot->other & ~ELF_ST_VISIBILITY (-1))
7097 | STV_HIDDEN);
7098 }
7099
7100 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
7101
7102 return TRUE;
7103 }
7104
7105 /* Return true if we have dynamic relocs against H that apply to
7106 read-only sections. */
7107
7108 static bfd_boolean
7109 readonly_dynrelocs (struct elf_link_hash_entry *h)
7110 {
7111 struct ppc_link_hash_entry *eh;
7112 struct elf_dyn_relocs *p;
7113
7114 eh = (struct ppc_link_hash_entry *) h;
7115 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7116 {
7117 asection *s = p->sec->output_section;
7118
7119 if (s != NULL && (s->flags & SEC_READONLY) != 0)
7120 return TRUE;
7121 }
7122 return FALSE;
7123 }
7124
7125
7126 /* Return true if a global entry stub will be created for H. Valid
7127 for ELFv2 before plt entries have been allocated. */
7128
7129 static bfd_boolean
7130 global_entry_stub (struct elf_link_hash_entry *h)
7131 {
7132 struct plt_entry *pent;
7133
7134 if (!h->pointer_equality_needed
7135 || h->def_regular)
7136 return FALSE;
7137
7138 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
7139 if (pent->plt.refcount > 0
7140 && pent->addend == 0)
7141 return TRUE;
7142
7143 return FALSE;
7144 }
7145
7146 /* Adjust a symbol defined by a dynamic object and referenced by a
7147 regular object. The current definition is in some section of the
7148 dynamic object, but we're not including those sections. We have to
7149 change the definition to something the rest of the link can
7150 understand. */
7151
7152 static bfd_boolean
7153 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
7154 struct elf_link_hash_entry *h)
7155 {
7156 struct ppc_link_hash_table *htab;
7157 asection *s;
7158
7159 htab = ppc_hash_table (info);
7160 if (htab == NULL)
7161 return FALSE;
7162
7163 /* Deal with function syms. */
7164 if (h->type == STT_FUNC
7165 || h->type == STT_GNU_IFUNC
7166 || h->needs_plt)
7167 {
7168 /* Clear procedure linkage table information for any symbol that
7169 won't need a .plt entry. */
7170 struct plt_entry *ent;
7171 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
7172 if (ent->plt.refcount > 0)
7173 break;
7174 if (ent == NULL
7175 || (h->type != STT_GNU_IFUNC
7176 && (SYMBOL_CALLS_LOCAL (info, h)
7177 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
7178 && h->root.type == bfd_link_hash_undefweak)))
7179 || ((struct ppc_link_hash_entry *) h)->save_res)
7180 {
7181 h->plt.plist = NULL;
7182 h->needs_plt = 0;
7183 h->pointer_equality_needed = 0;
7184 }
7185 else if (abiversion (info->output_bfd) >= 2)
7186 {
7187 /* Taking a function's address in a read/write section
7188 doesn't require us to define the function symbol in the
7189 executable on a global entry stub. A dynamic reloc can
7190 be used instead. The reason we prefer a few more dynamic
7191 relocs is that calling via a global entry stub costs a
7192 few more instructions, and pointer_equality_needed causes
7193 extra work in ld.so when resolving these symbols. */
7194 if (global_entry_stub (h)
7195 && !readonly_dynrelocs (h))
7196 {
7197 h->pointer_equality_needed = 0;
7198 /* After adjust_dynamic_symbol, non_got_ref set in
7199 the non-pic case means that dyn_relocs for this
7200 symbol should be discarded. */
7201 h->non_got_ref = 0;
7202 }
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
7240 /* If -z nocopyreloc was given, don't generate them either. */
7241 || info->nocopyreloc
7242
7243 /* If we didn't find any dynamic relocs in read-only sections, then
7244 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
7245 || (ELIMINATE_COPY_RELOCS && !readonly_dynrelocs (h))
7246
7247 /* Protected variables do not work with .dynbss. The copy in
7248 .dynbss won't be used by the shared library with the protected
7249 definition for the variable. Text relocations are preferable
7250 to an incorrect program. */
7251 || h->protected_def)
7252 {
7253 h->non_got_ref = 0;
7254 return TRUE;
7255 }
7256
7257 if (h->plt.plist != NULL)
7258 {
7259 /* We should never get here, but unfortunately there are versions
7260 of gcc out there that improperly (for this ABI) put initialized
7261 function pointers, vtable refs and suchlike in read-only
7262 sections. Allow them to proceed, but warn that this might
7263 break at runtime. */
7264 info->callbacks->einfo
7265 (_("%P: copy reloc against `%T' requires lazy plt linking; "
7266 "avoid setting LD_BIND_NOW=1 or upgrade gcc\n"),
7267 h->root.root.string);
7268 }
7269
7270 /* This is a reference to a symbol defined by a dynamic object which
7271 is not a function. */
7272
7273 /* We must allocate the symbol in our .dynbss section, which will
7274 become part of the .bss section of the executable. There will be
7275 an entry for this symbol in the .dynsym section. The dynamic
7276 object will contain position independent code, so all references
7277 from the dynamic object to this symbol will go through the global
7278 offset table. The dynamic linker will use the .dynsym entry to
7279 determine the address it must put in the global offset table, so
7280 both the dynamic object and the regular object will refer to the
7281 same memory location for the variable. */
7282
7283 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
7284 to copy the initial value out of the dynamic object and into the
7285 runtime process image. We need to remember the offset into the
7286 .rela.bss section we are going to use. */
7287 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
7288 {
7289 htab->relbss->size += sizeof (Elf64_External_Rela);
7290 h->needs_copy = 1;
7291 }
7292
7293 s = htab->dynbss;
7294
7295 return _bfd_elf_adjust_dynamic_copy (info, h, s);
7296 }
7297
7298 /* If given a function descriptor symbol, hide both the function code
7299 sym and the descriptor. */
7300 static void
7301 ppc64_elf_hide_symbol (struct bfd_link_info *info,
7302 struct elf_link_hash_entry *h,
7303 bfd_boolean force_local)
7304 {
7305 struct ppc_link_hash_entry *eh;
7306 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
7307
7308 eh = (struct ppc_link_hash_entry *) h;
7309 if (eh->is_func_descriptor)
7310 {
7311 struct ppc_link_hash_entry *fh = eh->oh;
7312
7313 if (fh == NULL)
7314 {
7315 const char *p, *q;
7316 struct ppc_link_hash_table *htab;
7317 char save;
7318
7319 /* We aren't supposed to use alloca in BFD because on
7320 systems which do not have alloca the version in libiberty
7321 calls xmalloc, which might cause the program to crash
7322 when it runs out of memory. This function doesn't have a
7323 return status, so there's no way to gracefully return an
7324 error. So cheat. We know that string[-1] can be safely
7325 accessed; It's either a string in an ELF string table,
7326 or allocated in an objalloc structure. */
7327
7328 p = eh->elf.root.root.string - 1;
7329 save = *p;
7330 *(char *) p = '.';
7331 htab = ppc_hash_table (info);
7332 if (htab == NULL)
7333 return;
7334
7335 fh = (struct ppc_link_hash_entry *)
7336 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
7337 *(char *) p = save;
7338
7339 /* Unfortunately, if it so happens that the string we were
7340 looking for was allocated immediately before this string,
7341 then we overwrote the string terminator. That's the only
7342 reason the lookup should fail. */
7343 if (fh == NULL)
7344 {
7345 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
7346 while (q >= eh->elf.root.root.string && *q == *p)
7347 --q, --p;
7348 if (q < eh->elf.root.root.string && *p == '.')
7349 fh = (struct ppc_link_hash_entry *)
7350 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
7351 }
7352 if (fh != NULL)
7353 {
7354 eh->oh = fh;
7355 fh->oh = eh;
7356 }
7357 }
7358 if (fh != NULL)
7359 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
7360 }
7361 }
7362
7363 static bfd_boolean
7364 get_sym_h (struct elf_link_hash_entry **hp,
7365 Elf_Internal_Sym **symp,
7366 asection **symsecp,
7367 unsigned char **tls_maskp,
7368 Elf_Internal_Sym **locsymsp,
7369 unsigned long r_symndx,
7370 bfd *ibfd)
7371 {
7372 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
7373
7374 if (r_symndx >= symtab_hdr->sh_info)
7375 {
7376 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
7377 struct elf_link_hash_entry *h;
7378
7379 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
7380 h = elf_follow_link (h);
7381
7382 if (hp != NULL)
7383 *hp = h;
7384
7385 if (symp != NULL)
7386 *symp = NULL;
7387
7388 if (symsecp != NULL)
7389 {
7390 asection *symsec = NULL;
7391 if (h->root.type == bfd_link_hash_defined
7392 || h->root.type == bfd_link_hash_defweak)
7393 symsec = h->root.u.def.section;
7394 *symsecp = symsec;
7395 }
7396
7397 if (tls_maskp != NULL)
7398 {
7399 struct ppc_link_hash_entry *eh;
7400
7401 eh = (struct ppc_link_hash_entry *) h;
7402 *tls_maskp = &eh->tls_mask;
7403 }
7404 }
7405 else
7406 {
7407 Elf_Internal_Sym *sym;
7408 Elf_Internal_Sym *locsyms = *locsymsp;
7409
7410 if (locsyms == NULL)
7411 {
7412 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
7413 if (locsyms == NULL)
7414 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
7415 symtab_hdr->sh_info,
7416 0, NULL, NULL, NULL);
7417 if (locsyms == NULL)
7418 return FALSE;
7419 *locsymsp = locsyms;
7420 }
7421 sym = locsyms + r_symndx;
7422
7423 if (hp != NULL)
7424 *hp = NULL;
7425
7426 if (symp != NULL)
7427 *symp = sym;
7428
7429 if (symsecp != NULL)
7430 *symsecp = bfd_section_from_elf_index (ibfd, sym->st_shndx);
7431
7432 if (tls_maskp != NULL)
7433 {
7434 struct got_entry **lgot_ents;
7435 unsigned char *tls_mask;
7436
7437 tls_mask = NULL;
7438 lgot_ents = elf_local_got_ents (ibfd);
7439 if (lgot_ents != NULL)
7440 {
7441 struct plt_entry **local_plt = (struct plt_entry **)
7442 (lgot_ents + symtab_hdr->sh_info);
7443 unsigned char *lgot_masks = (unsigned char *)
7444 (local_plt + symtab_hdr->sh_info);
7445 tls_mask = &lgot_masks[r_symndx];
7446 }
7447 *tls_maskp = tls_mask;
7448 }
7449 }
7450 return TRUE;
7451 }
7452
7453 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
7454 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
7455 type suitable for optimization, and 1 otherwise. */
7456
7457 static int
7458 get_tls_mask (unsigned char **tls_maskp,
7459 unsigned long *toc_symndx,
7460 bfd_vma *toc_addend,
7461 Elf_Internal_Sym **locsymsp,
7462 const Elf_Internal_Rela *rel,
7463 bfd *ibfd)
7464 {
7465 unsigned long r_symndx;
7466 int next_r;
7467 struct elf_link_hash_entry *h;
7468 Elf_Internal_Sym *sym;
7469 asection *sec;
7470 bfd_vma off;
7471
7472 r_symndx = ELF64_R_SYM (rel->r_info);
7473 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
7474 return 0;
7475
7476 if ((*tls_maskp != NULL && **tls_maskp != 0)
7477 || sec == NULL
7478 || ppc64_elf_section_data (sec) == NULL
7479 || ppc64_elf_section_data (sec)->sec_type != sec_toc)
7480 return 1;
7481
7482 /* Look inside a TOC section too. */
7483 if (h != NULL)
7484 {
7485 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
7486 off = h->root.u.def.value;
7487 }
7488 else
7489 off = sym->st_value;
7490 off += rel->r_addend;
7491 BFD_ASSERT (off % 8 == 0);
7492 r_symndx = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8];
7493 next_r = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8 + 1];
7494 if (toc_symndx != NULL)
7495 *toc_symndx = r_symndx;
7496 if (toc_addend != NULL)
7497 *toc_addend = ppc64_elf_section_data (sec)->u.toc.add[off / 8];
7498 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
7499 return 0;
7500 if ((h == NULL || is_static_defined (h))
7501 && (next_r == -1 || next_r == -2))
7502 return 1 - next_r;
7503 return 1;
7504 }
7505
7506 /* Find (or create) an entry in the tocsave hash table. */
7507
7508 static struct tocsave_entry *
7509 tocsave_find (struct ppc_link_hash_table *htab,
7510 enum insert_option insert,
7511 Elf_Internal_Sym **local_syms,
7512 const Elf_Internal_Rela *irela,
7513 bfd *ibfd)
7514 {
7515 unsigned long r_indx;
7516 struct elf_link_hash_entry *h;
7517 Elf_Internal_Sym *sym;
7518 struct tocsave_entry ent, *p;
7519 hashval_t hash;
7520 struct tocsave_entry **slot;
7521
7522 r_indx = ELF64_R_SYM (irela->r_info);
7523 if (!get_sym_h (&h, &sym, &ent.sec, NULL, local_syms, r_indx, ibfd))
7524 return NULL;
7525 if (ent.sec == NULL || ent.sec->output_section == NULL)
7526 {
7527 (*_bfd_error_handler)
7528 (_("%B: undefined symbol on R_PPC64_TOCSAVE relocation"));
7529 return NULL;
7530 }
7531
7532 if (h != NULL)
7533 ent.offset = h->root.u.def.value;
7534 else
7535 ent.offset = sym->st_value;
7536 ent.offset += irela->r_addend;
7537
7538 hash = tocsave_htab_hash (&ent);
7539 slot = ((struct tocsave_entry **)
7540 htab_find_slot_with_hash (htab->tocsave_htab, &ent, hash, insert));
7541 if (slot == NULL)
7542 return NULL;
7543
7544 if (*slot == NULL)
7545 {
7546 p = (struct tocsave_entry *) bfd_alloc (ibfd, sizeof (*p));
7547 if (p == NULL)
7548 return NULL;
7549 *p = ent;
7550 *slot = p;
7551 }
7552 return *slot;
7553 }
7554
7555 /* Adjust all global syms defined in opd sections. In gcc generated
7556 code for the old ABI, these will already have been done. */
7557
7558 static bfd_boolean
7559 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
7560 {
7561 struct ppc_link_hash_entry *eh;
7562 asection *sym_sec;
7563 struct _opd_sec_data *opd;
7564
7565 if (h->root.type == bfd_link_hash_indirect)
7566 return TRUE;
7567
7568 if (h->root.type != bfd_link_hash_defined
7569 && h->root.type != bfd_link_hash_defweak)
7570 return TRUE;
7571
7572 eh = (struct ppc_link_hash_entry *) h;
7573 if (eh->adjust_done)
7574 return TRUE;
7575
7576 sym_sec = eh->elf.root.u.def.section;
7577 opd = get_opd_info (sym_sec);
7578 if (opd != NULL && opd->adjust != NULL)
7579 {
7580 long adjust = opd->adjust[OPD_NDX (eh->elf.root.u.def.value)];
7581 if (adjust == -1)
7582 {
7583 /* This entry has been deleted. */
7584 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
7585 if (dsec == NULL)
7586 {
7587 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
7588 if (discarded_section (dsec))
7589 {
7590 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
7591 break;
7592 }
7593 }
7594 eh->elf.root.u.def.value = 0;
7595 eh->elf.root.u.def.section = dsec;
7596 }
7597 else
7598 eh->elf.root.u.def.value += adjust;
7599 eh->adjust_done = 1;
7600 }
7601 return TRUE;
7602 }
7603
7604 /* Handles decrementing dynamic reloc counts for the reloc specified by
7605 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM
7606 have already been determined. */
7607
7608 static bfd_boolean
7609 dec_dynrel_count (bfd_vma r_info,
7610 asection *sec,
7611 struct bfd_link_info *info,
7612 Elf_Internal_Sym **local_syms,
7613 struct elf_link_hash_entry *h,
7614 Elf_Internal_Sym *sym)
7615 {
7616 enum elf_ppc64_reloc_type r_type;
7617 asection *sym_sec = NULL;
7618
7619 /* Can this reloc be dynamic? This switch, and later tests here
7620 should be kept in sync with the code in check_relocs. */
7621 r_type = ELF64_R_TYPE (r_info);
7622 switch (r_type)
7623 {
7624 default:
7625 return TRUE;
7626
7627 case R_PPC64_TPREL16:
7628 case R_PPC64_TPREL16_LO:
7629 case R_PPC64_TPREL16_HI:
7630 case R_PPC64_TPREL16_HA:
7631 case R_PPC64_TPREL16_DS:
7632 case R_PPC64_TPREL16_LO_DS:
7633 case R_PPC64_TPREL16_HIGH:
7634 case R_PPC64_TPREL16_HIGHA:
7635 case R_PPC64_TPREL16_HIGHER:
7636 case R_PPC64_TPREL16_HIGHERA:
7637 case R_PPC64_TPREL16_HIGHEST:
7638 case R_PPC64_TPREL16_HIGHESTA:
7639 if (!bfd_link_pic (info))
7640 return TRUE;
7641
7642 case R_PPC64_TPREL64:
7643 case R_PPC64_DTPMOD64:
7644 case R_PPC64_DTPREL64:
7645 case R_PPC64_ADDR64:
7646 case R_PPC64_REL30:
7647 case R_PPC64_REL32:
7648 case R_PPC64_REL64:
7649 case R_PPC64_ADDR14:
7650 case R_PPC64_ADDR14_BRNTAKEN:
7651 case R_PPC64_ADDR14_BRTAKEN:
7652 case R_PPC64_ADDR16:
7653 case R_PPC64_ADDR16_DS:
7654 case R_PPC64_ADDR16_HA:
7655 case R_PPC64_ADDR16_HI:
7656 case R_PPC64_ADDR16_HIGH:
7657 case R_PPC64_ADDR16_HIGHA:
7658 case R_PPC64_ADDR16_HIGHER:
7659 case R_PPC64_ADDR16_HIGHERA:
7660 case R_PPC64_ADDR16_HIGHEST:
7661 case R_PPC64_ADDR16_HIGHESTA:
7662 case R_PPC64_ADDR16_LO:
7663 case R_PPC64_ADDR16_LO_DS:
7664 case R_PPC64_ADDR24:
7665 case R_PPC64_ADDR32:
7666 case R_PPC64_UADDR16:
7667 case R_PPC64_UADDR32:
7668 case R_PPC64_UADDR64:
7669 case R_PPC64_TOC:
7670 break;
7671 }
7672
7673 if (local_syms != NULL)
7674 {
7675 unsigned long r_symndx;
7676 bfd *ibfd = sec->owner;
7677
7678 r_symndx = ELF64_R_SYM (r_info);
7679 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
7680 return FALSE;
7681 }
7682
7683 if ((bfd_link_pic (info)
7684 && (must_be_dyn_reloc (info, r_type)
7685 || (h != NULL
7686 && (!SYMBOLIC_BIND (info, h)
7687 || h->root.type == bfd_link_hash_defweak
7688 || !h->def_regular))))
7689 || (ELIMINATE_COPY_RELOCS
7690 && !bfd_link_pic (info)
7691 && h != NULL
7692 && (h->root.type == bfd_link_hash_defweak
7693 || !h->def_regular)))
7694 ;
7695 else
7696 return TRUE;
7697
7698 if (h != NULL)
7699 {
7700 struct elf_dyn_relocs *p;
7701 struct elf_dyn_relocs **pp;
7702 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
7703
7704 /* elf_gc_sweep may have already removed all dyn relocs associated
7705 with local syms for a given section. Also, symbol flags are
7706 changed by elf_gc_sweep_symbol, confusing the test above. Don't
7707 report a dynreloc miscount. */
7708 if (*pp == NULL && info->gc_sections)
7709 return TRUE;
7710
7711 while ((p = *pp) != NULL)
7712 {
7713 if (p->sec == sec)
7714 {
7715 if (!must_be_dyn_reloc (info, r_type))
7716 p->pc_count -= 1;
7717 p->count -= 1;
7718 if (p->count == 0)
7719 *pp = p->next;
7720 return TRUE;
7721 }
7722 pp = &p->next;
7723 }
7724 }
7725 else
7726 {
7727 struct ppc_dyn_relocs *p;
7728 struct ppc_dyn_relocs **pp;
7729 void *vpp;
7730 bfd_boolean is_ifunc;
7731
7732 if (local_syms == NULL)
7733 sym_sec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
7734 if (sym_sec == NULL)
7735 sym_sec = sec;
7736
7737 vpp = &elf_section_data (sym_sec)->local_dynrel;
7738 pp = (struct ppc_dyn_relocs **) vpp;
7739
7740 if (*pp == NULL && info->gc_sections)
7741 return TRUE;
7742
7743 is_ifunc = ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC;
7744 while ((p = *pp) != NULL)
7745 {
7746 if (p->sec == sec && p->ifunc == is_ifunc)
7747 {
7748 p->count -= 1;
7749 if (p->count == 0)
7750 *pp = p->next;
7751 return TRUE;
7752 }
7753 pp = &p->next;
7754 }
7755 }
7756
7757 info->callbacks->einfo (_("%P: dynreloc miscount for %B, section %A\n"),
7758 sec->owner, sec);
7759 bfd_set_error (bfd_error_bad_value);
7760 return FALSE;
7761 }
7762
7763 /* Remove unused Official Procedure Descriptor entries. Currently we
7764 only remove those associated with functions in discarded link-once
7765 sections, or weakly defined functions that have been overridden. It
7766 would be possible to remove many more entries for statically linked
7767 applications. */
7768
7769 bfd_boolean
7770 ppc64_elf_edit_opd (struct bfd_link_info *info)
7771 {
7772 bfd *ibfd;
7773 bfd_boolean some_edited = FALSE;
7774 asection *need_pad = NULL;
7775 struct ppc_link_hash_table *htab;
7776
7777 htab = ppc_hash_table (info);
7778 if (htab == NULL)
7779 return FALSE;
7780
7781 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
7782 {
7783 asection *sec;
7784 Elf_Internal_Rela *relstart, *rel, *relend;
7785 Elf_Internal_Shdr *symtab_hdr;
7786 Elf_Internal_Sym *local_syms;
7787 struct _opd_sec_data *opd;
7788 bfd_boolean need_edit, add_aux_fields, broken;
7789 bfd_size_type cnt_16b = 0;
7790
7791 if (!is_ppc64_elf (ibfd))
7792 continue;
7793
7794 sec = bfd_get_section_by_name (ibfd, ".opd");
7795 if (sec == NULL || sec->size == 0)
7796 continue;
7797
7798 if (sec->sec_info_type == SEC_INFO_TYPE_JUST_SYMS)
7799 continue;
7800
7801 if (sec->output_section == bfd_abs_section_ptr)
7802 continue;
7803
7804 /* Look through the section relocs. */
7805 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
7806 continue;
7807
7808 local_syms = NULL;
7809 symtab_hdr = &elf_symtab_hdr (ibfd);
7810
7811 /* Read the relocations. */
7812 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7813 info->keep_memory);
7814 if (relstart == NULL)
7815 return FALSE;
7816
7817 /* First run through the relocs to check they are sane, and to
7818 determine whether we need to edit this opd section. */
7819 need_edit = FALSE;
7820 broken = FALSE;
7821 need_pad = sec;
7822 relend = relstart + sec->reloc_count;
7823 for (rel = relstart; rel < relend; )
7824 {
7825 enum elf_ppc64_reloc_type r_type;
7826 unsigned long r_symndx;
7827 asection *sym_sec;
7828 struct elf_link_hash_entry *h;
7829 Elf_Internal_Sym *sym;
7830 bfd_vma offset;
7831
7832 /* .opd contains an array of 16 or 24 byte entries. We're
7833 only interested in the reloc pointing to a function entry
7834 point. */
7835 offset = rel->r_offset;
7836 if (rel + 1 == relend
7837 || rel[1].r_offset != offset + 8)
7838 {
7839 /* If someone messes with .opd alignment then after a
7840 "ld -r" we might have padding in the middle of .opd.
7841 Also, there's nothing to prevent someone putting
7842 something silly in .opd with the assembler. No .opd
7843 optimization for them! */
7844 broken_opd:
7845 (*_bfd_error_handler)
7846 (_("%B: .opd is not a regular array of opd entries"), ibfd);
7847 broken = TRUE;
7848 break;
7849 }
7850
7851 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
7852 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
7853 {
7854 (*_bfd_error_handler)
7855 (_("%B: unexpected reloc type %u in .opd section"),
7856 ibfd, r_type);
7857 broken = TRUE;
7858 break;
7859 }
7860
7861 r_symndx = ELF64_R_SYM (rel->r_info);
7862 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7863 r_symndx, ibfd))
7864 goto error_ret;
7865
7866 if (sym_sec == NULL || sym_sec->owner == NULL)
7867 {
7868 const char *sym_name;
7869 if (h != NULL)
7870 sym_name = h->root.root.string;
7871 else
7872 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
7873 sym_sec);
7874
7875 (*_bfd_error_handler)
7876 (_("%B: undefined sym `%s' in .opd section"),
7877 ibfd, sym_name);
7878 broken = TRUE;
7879 break;
7880 }
7881
7882 /* opd entries are always for functions defined in the
7883 current input bfd. If the symbol isn't defined in the
7884 input bfd, then we won't be using the function in this
7885 bfd; It must be defined in a linkonce section in another
7886 bfd, or is weak. It's also possible that we are
7887 discarding the function due to a linker script /DISCARD/,
7888 which we test for via the output_section. */
7889 if (sym_sec->owner != ibfd
7890 || sym_sec->output_section == bfd_abs_section_ptr)
7891 need_edit = TRUE;
7892
7893 rel += 2;
7894 if (rel + 1 == relend
7895 || (rel + 2 < relend
7896 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC))
7897 ++rel;
7898
7899 if (rel == relend)
7900 {
7901 if (sec->size == offset + 24)
7902 {
7903 need_pad = NULL;
7904 break;
7905 }
7906 if (sec->size == offset + 16)
7907 {
7908 cnt_16b++;
7909 break;
7910 }
7911 goto broken_opd;
7912 }
7913 else if (rel + 1 < relend
7914 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
7915 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
7916 {
7917 if (rel[0].r_offset == offset + 16)
7918 cnt_16b++;
7919 else if (rel[0].r_offset != offset + 24)
7920 goto broken_opd;
7921 }
7922 else
7923 goto broken_opd;
7924 }
7925
7926 add_aux_fields = htab->params->non_overlapping_opd && cnt_16b > 0;
7927
7928 if (!broken && (need_edit || add_aux_fields))
7929 {
7930 Elf_Internal_Rela *write_rel;
7931 Elf_Internal_Shdr *rel_hdr;
7932 bfd_byte *rptr, *wptr;
7933 bfd_byte *new_contents;
7934 bfd_size_type amt;
7935
7936 new_contents = NULL;
7937 amt = OPD_NDX (sec->size) * sizeof (long);
7938 opd = &ppc64_elf_section_data (sec)->u.opd;
7939 opd->adjust = bfd_zalloc (sec->owner, amt);
7940 if (opd->adjust == NULL)
7941 return FALSE;
7942 ppc64_elf_section_data (sec)->sec_type = sec_opd;
7943
7944 /* This seems a waste of time as input .opd sections are all
7945 zeros as generated by gcc, but I suppose there's no reason
7946 this will always be so. We might start putting something in
7947 the third word of .opd entries. */
7948 if ((sec->flags & SEC_IN_MEMORY) == 0)
7949 {
7950 bfd_byte *loc;
7951 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
7952 {
7953 if (loc != NULL)
7954 free (loc);
7955 error_ret:
7956 if (local_syms != NULL
7957 && symtab_hdr->contents != (unsigned char *) local_syms)
7958 free (local_syms);
7959 if (elf_section_data (sec)->relocs != relstart)
7960 free (relstart);
7961 return FALSE;
7962 }
7963 sec->contents = loc;
7964 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
7965 }
7966
7967 elf_section_data (sec)->relocs = relstart;
7968
7969 new_contents = sec->contents;
7970 if (add_aux_fields)
7971 {
7972 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
7973 if (new_contents == NULL)
7974 return FALSE;
7975 need_pad = NULL;
7976 }
7977 wptr = new_contents;
7978 rptr = sec->contents;
7979 write_rel = relstart;
7980 for (rel = relstart; rel < relend; )
7981 {
7982 unsigned long r_symndx;
7983 asection *sym_sec;
7984 struct elf_link_hash_entry *h;
7985 struct ppc_link_hash_entry *fdh = NULL;
7986 Elf_Internal_Sym *sym;
7987 long opd_ent_size;
7988 Elf_Internal_Rela *next_rel;
7989 bfd_boolean skip;
7990
7991 r_symndx = ELF64_R_SYM (rel->r_info);
7992 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7993 r_symndx, ibfd))
7994 goto error_ret;
7995
7996 next_rel = rel + 2;
7997 if (next_rel + 1 == relend
7998 || (next_rel + 2 < relend
7999 && ELF64_R_TYPE (next_rel[2].r_info) == R_PPC64_TOC))
8000 ++next_rel;
8001
8002 /* See if the .opd entry is full 24 byte or
8003 16 byte (with fd_aux entry overlapped with next
8004 fd_func). */
8005 opd_ent_size = 24;
8006 if (next_rel == relend)
8007 {
8008 if (sec->size == rel->r_offset + 16)
8009 opd_ent_size = 16;
8010 }
8011 else if (next_rel->r_offset == rel->r_offset + 16)
8012 opd_ent_size = 16;
8013
8014 if (h != NULL
8015 && h->root.root.string[0] == '.')
8016 {
8017 fdh = lookup_fdh ((struct ppc_link_hash_entry *) h, htab);
8018 if (fdh != NULL
8019 && fdh->elf.root.type != bfd_link_hash_defined
8020 && fdh->elf.root.type != bfd_link_hash_defweak)
8021 fdh = NULL;
8022 }
8023
8024 skip = (sym_sec->owner != ibfd
8025 || sym_sec->output_section == bfd_abs_section_ptr);
8026 if (skip)
8027 {
8028 if (fdh != NULL && sym_sec->owner == ibfd)
8029 {
8030 /* Arrange for the function descriptor sym
8031 to be dropped. */
8032 fdh->elf.root.u.def.value = 0;
8033 fdh->elf.root.u.def.section = sym_sec;
8034 }
8035 opd->adjust[OPD_NDX (rel->r_offset)] = -1;
8036
8037 if (NO_OPD_RELOCS || bfd_link_relocatable (info))
8038 rel = next_rel;
8039 else
8040 while (1)
8041 {
8042 if (!dec_dynrel_count (rel->r_info, sec, info,
8043 NULL, h, sym))
8044 goto error_ret;
8045
8046 if (++rel == next_rel)
8047 break;
8048
8049 r_symndx = ELF64_R_SYM (rel->r_info);
8050 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8051 r_symndx, ibfd))
8052 goto error_ret;
8053 }
8054 }
8055 else
8056 {
8057 /* We'll be keeping this opd entry. */
8058 long adjust;
8059
8060 if (fdh != NULL)
8061 {
8062 /* Redefine the function descriptor symbol to
8063 this location in the opd section. It is
8064 necessary to update the value here rather
8065 than using an array of adjustments as we do
8066 for local symbols, because various places
8067 in the generic ELF code use the value
8068 stored in u.def.value. */
8069 fdh->elf.root.u.def.value = wptr - new_contents;
8070 fdh->adjust_done = 1;
8071 }
8072
8073 /* Local syms are a bit tricky. We could
8074 tweak them as they can be cached, but
8075 we'd need to look through the local syms
8076 for the function descriptor sym which we
8077 don't have at the moment. So keep an
8078 array of adjustments. */
8079 adjust = (wptr - new_contents) - (rptr - sec->contents);
8080 opd->adjust[OPD_NDX (rel->r_offset)] = adjust;
8081
8082 if (wptr != rptr)
8083 memcpy (wptr, rptr, opd_ent_size);
8084 wptr += opd_ent_size;
8085 if (add_aux_fields && opd_ent_size == 16)
8086 {
8087 memset (wptr, '\0', 8);
8088 wptr += 8;
8089 }
8090
8091 /* We need to adjust any reloc offsets to point to the
8092 new opd entries. */
8093 for ( ; rel != next_rel; ++rel)
8094 {
8095 rel->r_offset += adjust;
8096 if (write_rel != rel)
8097 memcpy (write_rel, rel, sizeof (*rel));
8098 ++write_rel;
8099 }
8100 }
8101
8102 rptr += opd_ent_size;
8103 }
8104
8105 sec->size = wptr - new_contents;
8106 sec->reloc_count = write_rel - relstart;
8107 if (add_aux_fields)
8108 {
8109 free (sec->contents);
8110 sec->contents = new_contents;
8111 }
8112
8113 /* Fudge the header size too, as this is used later in
8114 elf_bfd_final_link if we are emitting relocs. */
8115 rel_hdr = _bfd_elf_single_rel_hdr (sec);
8116 rel_hdr->sh_size = sec->reloc_count * rel_hdr->sh_entsize;
8117 some_edited = TRUE;
8118 }
8119 else if (elf_section_data (sec)->relocs != relstart)
8120 free (relstart);
8121
8122 if (local_syms != NULL
8123 && symtab_hdr->contents != (unsigned char *) local_syms)
8124 {
8125 if (!info->keep_memory)
8126 free (local_syms);
8127 else
8128 symtab_hdr->contents = (unsigned char *) local_syms;
8129 }
8130 }
8131
8132 if (some_edited)
8133 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
8134
8135 /* If we are doing a final link and the last .opd entry is just 16 byte
8136 long, add a 8 byte padding after it. */
8137 if (need_pad != NULL && !bfd_link_relocatable (info))
8138 {
8139 bfd_byte *p;
8140
8141 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
8142 {
8143 BFD_ASSERT (need_pad->size > 0);
8144
8145 p = bfd_malloc (need_pad->size + 8);
8146 if (p == NULL)
8147 return FALSE;
8148
8149 if (! bfd_get_section_contents (need_pad->owner, need_pad,
8150 p, 0, need_pad->size))
8151 return FALSE;
8152
8153 need_pad->contents = p;
8154 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
8155 }
8156 else
8157 {
8158 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
8159 if (p == NULL)
8160 return FALSE;
8161
8162 need_pad->contents = p;
8163 }
8164
8165 memset (need_pad->contents + need_pad->size, 0, 8);
8166 need_pad->size += 8;
8167 }
8168
8169 return TRUE;
8170 }
8171
8172 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
8173
8174 asection *
8175 ppc64_elf_tls_setup (struct bfd_link_info *info)
8176 {
8177 struct ppc_link_hash_table *htab;
8178
8179 htab = ppc_hash_table (info);
8180 if (htab == NULL)
8181 return NULL;
8182
8183 if (abiversion (info->output_bfd) == 1)
8184 htab->opd_abi = 1;
8185
8186 if (htab->params->no_multi_toc)
8187 htab->do_multi_toc = 0;
8188 else if (!htab->do_multi_toc)
8189 htab->params->no_multi_toc = 1;
8190
8191 htab->tls_get_addr = ((struct ppc_link_hash_entry *)
8192 elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
8193 FALSE, FALSE, TRUE));
8194 /* Move dynamic linking info to the function descriptor sym. */
8195 if (htab->tls_get_addr != NULL)
8196 func_desc_adjust (&htab->tls_get_addr->elf, info);
8197 htab->tls_get_addr_fd = ((struct ppc_link_hash_entry *)
8198 elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
8199 FALSE, FALSE, TRUE));
8200 if (htab->params->tls_get_addr_opt)
8201 {
8202 struct elf_link_hash_entry *opt, *opt_fd, *tga, *tga_fd;
8203
8204 opt = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr_opt",
8205 FALSE, FALSE, TRUE);
8206 if (opt != NULL)
8207 func_desc_adjust (opt, info);
8208 opt_fd = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
8209 FALSE, FALSE, TRUE);
8210 if (opt_fd != NULL
8211 && (opt_fd->root.type == bfd_link_hash_defined
8212 || opt_fd->root.type == bfd_link_hash_defweak))
8213 {
8214 /* If glibc supports an optimized __tls_get_addr call stub,
8215 signalled by the presence of __tls_get_addr_opt, and we'll
8216 be calling __tls_get_addr via a plt call stub, then
8217 make __tls_get_addr point to __tls_get_addr_opt. */
8218 tga_fd = &htab->tls_get_addr_fd->elf;
8219 if (htab->elf.dynamic_sections_created
8220 && tga_fd != NULL
8221 && (tga_fd->type == STT_FUNC
8222 || tga_fd->needs_plt)
8223 && !(SYMBOL_CALLS_LOCAL (info, tga_fd)
8224 || (ELF_ST_VISIBILITY (tga_fd->other) != STV_DEFAULT
8225 && tga_fd->root.type == bfd_link_hash_undefweak)))
8226 {
8227 struct plt_entry *ent;
8228
8229 for (ent = tga_fd->plt.plist; ent != NULL; ent = ent->next)
8230 if (ent->plt.refcount > 0)
8231 break;
8232 if (ent != NULL)
8233 {
8234 tga_fd->root.type = bfd_link_hash_indirect;
8235 tga_fd->root.u.i.link = &opt_fd->root;
8236 ppc64_elf_copy_indirect_symbol (info, opt_fd, tga_fd);
8237 opt_fd->forced_local = 0;
8238 if (opt_fd->dynindx != -1)
8239 {
8240 /* Use __tls_get_addr_opt in dynamic relocations. */
8241 opt_fd->dynindx = -1;
8242 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
8243 opt_fd->dynstr_index);
8244 if (!bfd_elf_link_record_dynamic_symbol (info, opt_fd))
8245 return NULL;
8246 }
8247 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) opt_fd;
8248 tga = &htab->tls_get_addr->elf;
8249 if (opt != NULL && tga != NULL)
8250 {
8251 tga->root.type = bfd_link_hash_indirect;
8252 tga->root.u.i.link = &opt->root;
8253 ppc64_elf_copy_indirect_symbol (info, opt, tga);
8254 opt->forced_local = 0;
8255 _bfd_elf_link_hash_hide_symbol (info, opt,
8256 tga->forced_local);
8257 htab->tls_get_addr = (struct ppc_link_hash_entry *) opt;
8258 }
8259 htab->tls_get_addr_fd->oh = htab->tls_get_addr;
8260 htab->tls_get_addr_fd->is_func_descriptor = 1;
8261 if (htab->tls_get_addr != NULL)
8262 {
8263 htab->tls_get_addr->oh = htab->tls_get_addr_fd;
8264 htab->tls_get_addr->is_func = 1;
8265 }
8266 }
8267 }
8268 }
8269 else if (htab->params->tls_get_addr_opt < 0)
8270 htab->params->tls_get_addr_opt = 0;
8271 }
8272 return _bfd_elf_tls_setup (info->output_bfd, info);
8273 }
8274
8275 /* Return TRUE iff REL is a branch reloc with a global symbol matching
8276 HASH1 or HASH2. */
8277
8278 static bfd_boolean
8279 branch_reloc_hash_match (const bfd *ibfd,
8280 const Elf_Internal_Rela *rel,
8281 const struct ppc_link_hash_entry *hash1,
8282 const struct ppc_link_hash_entry *hash2)
8283 {
8284 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
8285 enum elf_ppc64_reloc_type r_type = ELF64_R_TYPE (rel->r_info);
8286 unsigned int r_symndx = ELF64_R_SYM (rel->r_info);
8287
8288 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
8289 {
8290 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
8291 struct elf_link_hash_entry *h;
8292
8293 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
8294 h = elf_follow_link (h);
8295 if (h == &hash1->elf || h == &hash2->elf)
8296 return TRUE;
8297 }
8298 return FALSE;
8299 }
8300
8301 /* Run through all the TLS relocs looking for optimization
8302 opportunities. The linker has been hacked (see ppc64elf.em) to do
8303 a preliminary section layout so that we know the TLS segment
8304 offsets. We can't optimize earlier because some optimizations need
8305 to know the tp offset, and we need to optimize before allocating
8306 dynamic relocations. */
8307
8308 bfd_boolean
8309 ppc64_elf_tls_optimize (struct bfd_link_info *info)
8310 {
8311 bfd *ibfd;
8312 asection *sec;
8313 struct ppc_link_hash_table *htab;
8314 unsigned char *toc_ref;
8315 int pass;
8316
8317 if (!bfd_link_executable (info))
8318 return TRUE;
8319
8320 htab = ppc_hash_table (info);
8321 if (htab == NULL)
8322 return FALSE;
8323
8324 /* Make two passes over the relocs. On the first pass, mark toc
8325 entries involved with tls relocs, and check that tls relocs
8326 involved in setting up a tls_get_addr call are indeed followed by
8327 such a call. If they are not, we can't do any tls optimization.
8328 On the second pass twiddle tls_mask flags to notify
8329 relocate_section that optimization can be done, and adjust got
8330 and plt refcounts. */
8331 toc_ref = NULL;
8332 for (pass = 0; pass < 2; ++pass)
8333 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
8334 {
8335 Elf_Internal_Sym *locsyms = NULL;
8336 asection *toc = bfd_get_section_by_name (ibfd, ".toc");
8337
8338 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8339 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
8340 {
8341 Elf_Internal_Rela *relstart, *rel, *relend;
8342 bfd_boolean found_tls_get_addr_arg = 0;
8343
8344 /* Read the relocations. */
8345 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8346 info->keep_memory);
8347 if (relstart == NULL)
8348 {
8349 free (toc_ref);
8350 return FALSE;
8351 }
8352
8353 relend = relstart + sec->reloc_count;
8354 for (rel = relstart; rel < relend; rel++)
8355 {
8356 enum elf_ppc64_reloc_type r_type;
8357 unsigned long r_symndx;
8358 struct elf_link_hash_entry *h;
8359 Elf_Internal_Sym *sym;
8360 asection *sym_sec;
8361 unsigned char *tls_mask;
8362 unsigned char tls_set, tls_clear, tls_type = 0;
8363 bfd_vma value;
8364 bfd_boolean ok_tprel, is_local;
8365 long toc_ref_index = 0;
8366 int expecting_tls_get_addr = 0;
8367 bfd_boolean ret = FALSE;
8368
8369 r_symndx = ELF64_R_SYM (rel->r_info);
8370 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
8371 r_symndx, ibfd))
8372 {
8373 err_free_rel:
8374 if (elf_section_data (sec)->relocs != relstart)
8375 free (relstart);
8376 if (toc_ref != NULL)
8377 free (toc_ref);
8378 if (locsyms != NULL
8379 && (elf_symtab_hdr (ibfd).contents
8380 != (unsigned char *) locsyms))
8381 free (locsyms);
8382 return ret;
8383 }
8384
8385 if (h != NULL)
8386 {
8387 if (h->root.type == bfd_link_hash_defined
8388 || h->root.type == bfd_link_hash_defweak)
8389 value = h->root.u.def.value;
8390 else if (h->root.type == bfd_link_hash_undefweak)
8391 value = 0;
8392 else
8393 {
8394 found_tls_get_addr_arg = 0;
8395 continue;
8396 }
8397 }
8398 else
8399 /* Symbols referenced by TLS relocs must be of type
8400 STT_TLS. So no need for .opd local sym adjust. */
8401 value = sym->st_value;
8402
8403 ok_tprel = FALSE;
8404 is_local = FALSE;
8405 if (h == NULL
8406 || !h->def_dynamic)
8407 {
8408 is_local = TRUE;
8409 if (h != NULL
8410 && h->root.type == bfd_link_hash_undefweak)
8411 ok_tprel = TRUE;
8412 else if (sym_sec != NULL
8413 && sym_sec->output_section != NULL)
8414 {
8415 value += sym_sec->output_offset;
8416 value += sym_sec->output_section->vma;
8417 value -= htab->elf.tls_sec->vma;
8418 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
8419 < (bfd_vma) 1 << 32);
8420 }
8421 }
8422
8423 r_type = ELF64_R_TYPE (rel->r_info);
8424 /* If this section has old-style __tls_get_addr calls
8425 without marker relocs, then check that each
8426 __tls_get_addr call reloc is preceded by a reloc
8427 that conceivably belongs to the __tls_get_addr arg
8428 setup insn. If we don't find matching arg setup
8429 relocs, don't do any tls optimization. */
8430 if (pass == 0
8431 && sec->has_tls_get_addr_call
8432 && h != NULL
8433 && (h == &htab->tls_get_addr->elf
8434 || h == &htab->tls_get_addr_fd->elf)
8435 && !found_tls_get_addr_arg
8436 && is_branch_reloc (r_type))
8437 {
8438 info->callbacks->minfo (_("%H __tls_get_addr lost arg, "
8439 "TLS optimization disabled\n"),
8440 ibfd, sec, rel->r_offset);
8441 ret = TRUE;
8442 goto err_free_rel;
8443 }
8444
8445 found_tls_get_addr_arg = 0;
8446 switch (r_type)
8447 {
8448 case R_PPC64_GOT_TLSLD16:
8449 case R_PPC64_GOT_TLSLD16_LO:
8450 expecting_tls_get_addr = 1;
8451 found_tls_get_addr_arg = 1;
8452 /* Fall thru */
8453
8454 case R_PPC64_GOT_TLSLD16_HI:
8455 case R_PPC64_GOT_TLSLD16_HA:
8456 /* These relocs should never be against a symbol
8457 defined in a shared lib. Leave them alone if
8458 that turns out to be the case. */
8459 if (!is_local)
8460 continue;
8461
8462 /* LD -> LE */
8463 tls_set = 0;
8464 tls_clear = TLS_LD;
8465 tls_type = TLS_TLS | TLS_LD;
8466 break;
8467
8468 case R_PPC64_GOT_TLSGD16:
8469 case R_PPC64_GOT_TLSGD16_LO:
8470 expecting_tls_get_addr = 1;
8471 found_tls_get_addr_arg = 1;
8472 /* Fall thru */
8473
8474 case R_PPC64_GOT_TLSGD16_HI:
8475 case R_PPC64_GOT_TLSGD16_HA:
8476 if (ok_tprel)
8477 /* GD -> LE */
8478 tls_set = 0;
8479 else
8480 /* GD -> IE */
8481 tls_set = TLS_TLS | TLS_TPRELGD;
8482 tls_clear = TLS_GD;
8483 tls_type = TLS_TLS | TLS_GD;
8484 break;
8485
8486 case R_PPC64_GOT_TPREL16_DS:
8487 case R_PPC64_GOT_TPREL16_LO_DS:
8488 case R_PPC64_GOT_TPREL16_HI:
8489 case R_PPC64_GOT_TPREL16_HA:
8490 if (ok_tprel)
8491 {
8492 /* IE -> LE */
8493 tls_set = 0;
8494 tls_clear = TLS_TPREL;
8495 tls_type = TLS_TLS | TLS_TPREL;
8496 break;
8497 }
8498 continue;
8499
8500 case R_PPC64_TLSGD:
8501 case R_PPC64_TLSLD:
8502 found_tls_get_addr_arg = 1;
8503 /* Fall thru */
8504
8505 case R_PPC64_TLS:
8506 case R_PPC64_TOC16:
8507 case R_PPC64_TOC16_LO:
8508 if (sym_sec == NULL || sym_sec != toc)
8509 continue;
8510
8511 /* Mark this toc entry as referenced by a TLS
8512 code sequence. We can do that now in the
8513 case of R_PPC64_TLS, and after checking for
8514 tls_get_addr for the TOC16 relocs. */
8515 if (toc_ref == NULL)
8516 toc_ref = bfd_zmalloc (toc->output_section->rawsize / 8);
8517 if (toc_ref == NULL)
8518 goto err_free_rel;
8519
8520 if (h != NULL)
8521 value = h->root.u.def.value;
8522 else
8523 value = sym->st_value;
8524 value += rel->r_addend;
8525 if (value % 8 != 0)
8526 continue;
8527 BFD_ASSERT (value < toc->size
8528 && toc->output_offset % 8 == 0);
8529 toc_ref_index = (value + toc->output_offset) / 8;
8530 if (r_type == R_PPC64_TLS
8531 || r_type == R_PPC64_TLSGD
8532 || r_type == R_PPC64_TLSLD)
8533 {
8534 toc_ref[toc_ref_index] = 1;
8535 continue;
8536 }
8537
8538 if (pass != 0 && toc_ref[toc_ref_index] == 0)
8539 continue;
8540
8541 tls_set = 0;
8542 tls_clear = 0;
8543 expecting_tls_get_addr = 2;
8544 break;
8545
8546 case R_PPC64_TPREL64:
8547 if (pass == 0
8548 || sec != toc
8549 || toc_ref == NULL
8550 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
8551 continue;
8552 if (ok_tprel)
8553 {
8554 /* IE -> LE */
8555 tls_set = TLS_EXPLICIT;
8556 tls_clear = TLS_TPREL;
8557 break;
8558 }
8559 continue;
8560
8561 case R_PPC64_DTPMOD64:
8562 if (pass == 0
8563 || sec != toc
8564 || toc_ref == NULL
8565 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
8566 continue;
8567 if (rel + 1 < relend
8568 && (rel[1].r_info
8569 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
8570 && rel[1].r_offset == rel->r_offset + 8)
8571 {
8572 if (ok_tprel)
8573 /* GD -> LE */
8574 tls_set = TLS_EXPLICIT | TLS_GD;
8575 else
8576 /* GD -> IE */
8577 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
8578 tls_clear = TLS_GD;
8579 }
8580 else
8581 {
8582 if (!is_local)
8583 continue;
8584
8585 /* LD -> LE */
8586 tls_set = TLS_EXPLICIT;
8587 tls_clear = TLS_LD;
8588 }
8589 break;
8590
8591 default:
8592 continue;
8593 }
8594
8595 if (pass == 0)
8596 {
8597 if (!expecting_tls_get_addr
8598 || !sec->has_tls_get_addr_call)
8599 continue;
8600
8601 if (rel + 1 < relend
8602 && branch_reloc_hash_match (ibfd, rel + 1,
8603 htab->tls_get_addr,
8604 htab->tls_get_addr_fd))
8605 {
8606 if (expecting_tls_get_addr == 2)
8607 {
8608 /* Check for toc tls entries. */
8609 unsigned char *toc_tls;
8610 int retval;
8611
8612 retval = get_tls_mask (&toc_tls, NULL, NULL,
8613 &locsyms,
8614 rel, ibfd);
8615 if (retval == 0)
8616 goto err_free_rel;
8617 if (toc_tls != NULL)
8618 {
8619 if ((*toc_tls & (TLS_GD | TLS_LD)) != 0)
8620 found_tls_get_addr_arg = 1;
8621 if (retval > 1)
8622 toc_ref[toc_ref_index] = 1;
8623 }
8624 }
8625 continue;
8626 }
8627
8628 if (expecting_tls_get_addr != 1)
8629 continue;
8630
8631 /* Uh oh, we didn't find the expected call. We
8632 could just mark this symbol to exclude it
8633 from tls optimization but it's safer to skip
8634 the entire optimization. */
8635 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
8636 "TLS optimization disabled\n"),
8637 ibfd, sec, rel->r_offset);
8638 ret = TRUE;
8639 goto err_free_rel;
8640 }
8641
8642 if (expecting_tls_get_addr && htab->tls_get_addr != NULL)
8643 {
8644 struct plt_entry *ent;
8645 for (ent = htab->tls_get_addr->elf.plt.plist;
8646 ent != NULL;
8647 ent = ent->next)
8648 if (ent->addend == 0)
8649 {
8650 if (ent->plt.refcount > 0)
8651 {
8652 ent->plt.refcount -= 1;
8653 expecting_tls_get_addr = 0;
8654 }
8655 break;
8656 }
8657 }
8658
8659 if (expecting_tls_get_addr && htab->tls_get_addr_fd != NULL)
8660 {
8661 struct plt_entry *ent;
8662 for (ent = htab->tls_get_addr_fd->elf.plt.plist;
8663 ent != NULL;
8664 ent = ent->next)
8665 if (ent->addend == 0)
8666 {
8667 if (ent->plt.refcount > 0)
8668 ent->plt.refcount -= 1;
8669 break;
8670 }
8671 }
8672
8673 if (tls_clear == 0)
8674 continue;
8675
8676 if ((tls_set & TLS_EXPLICIT) == 0)
8677 {
8678 struct got_entry *ent;
8679
8680 /* Adjust got entry for this reloc. */
8681 if (h != NULL)
8682 ent = h->got.glist;
8683 else
8684 ent = elf_local_got_ents (ibfd)[r_symndx];
8685
8686 for (; ent != NULL; ent = ent->next)
8687 if (ent->addend == rel->r_addend
8688 && ent->owner == ibfd
8689 && ent->tls_type == tls_type)
8690 break;
8691 if (ent == NULL)
8692 abort ();
8693
8694 if (tls_set == 0)
8695 {
8696 /* We managed to get rid of a got entry. */
8697 if (ent->got.refcount > 0)
8698 ent->got.refcount -= 1;
8699 }
8700 }
8701 else
8702 {
8703 /* If we got rid of a DTPMOD/DTPREL reloc pair then
8704 we'll lose one or two dyn relocs. */
8705 if (!dec_dynrel_count (rel->r_info, sec, info,
8706 NULL, h, sym))
8707 return FALSE;
8708
8709 if (tls_set == (TLS_EXPLICIT | TLS_GD))
8710 {
8711 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
8712 NULL, h, sym))
8713 return FALSE;
8714 }
8715 }
8716
8717 *tls_mask |= tls_set;
8718 *tls_mask &= ~tls_clear;
8719 }
8720
8721 if (elf_section_data (sec)->relocs != relstart)
8722 free (relstart);
8723 }
8724
8725 if (locsyms != NULL
8726 && (elf_symtab_hdr (ibfd).contents != (unsigned char *) locsyms))
8727 {
8728 if (!info->keep_memory)
8729 free (locsyms);
8730 else
8731 elf_symtab_hdr (ibfd).contents = (unsigned char *) locsyms;
8732 }
8733 }
8734
8735 if (toc_ref != NULL)
8736 free (toc_ref);
8737 return TRUE;
8738 }
8739
8740 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
8741 the values of any global symbols in a toc section that has been
8742 edited. Globals in toc sections should be a rarity, so this function
8743 sets a flag if any are found in toc sections other than the one just
8744 edited, so that futher hash table traversals can be avoided. */
8745
8746 struct adjust_toc_info
8747 {
8748 asection *toc;
8749 unsigned long *skip;
8750 bfd_boolean global_toc_syms;
8751 };
8752
8753 enum toc_skip_enum { ref_from_discarded = 1, can_optimize = 2 };
8754
8755 static bfd_boolean
8756 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
8757 {
8758 struct ppc_link_hash_entry *eh;
8759 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
8760 unsigned long i;
8761
8762 if (h->root.type != bfd_link_hash_defined
8763 && h->root.type != bfd_link_hash_defweak)
8764 return TRUE;
8765
8766 eh = (struct ppc_link_hash_entry *) h;
8767 if (eh->adjust_done)
8768 return TRUE;
8769
8770 if (eh->elf.root.u.def.section == toc_inf->toc)
8771 {
8772 if (eh->elf.root.u.def.value > toc_inf->toc->rawsize)
8773 i = toc_inf->toc->rawsize >> 3;
8774 else
8775 i = eh->elf.root.u.def.value >> 3;
8776
8777 if ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0)
8778 {
8779 (*_bfd_error_handler)
8780 (_("%s defined on removed toc entry"), eh->elf.root.root.string);
8781 do
8782 ++i;
8783 while ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0);
8784 eh->elf.root.u.def.value = (bfd_vma) i << 3;
8785 }
8786
8787 eh->elf.root.u.def.value -= toc_inf->skip[i];
8788 eh->adjust_done = 1;
8789 }
8790 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
8791 toc_inf->global_toc_syms = TRUE;
8792
8793 return TRUE;
8794 }
8795
8796 /* Return TRUE iff INSN is one we expect on a _LO variety toc/got reloc. */
8797
8798 static bfd_boolean
8799 ok_lo_toc_insn (unsigned int insn)
8800 {
8801 return ((insn & (0x3f << 26)) == 14u << 26 /* addi */
8802 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
8803 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
8804 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
8805 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
8806 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
8807 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
8808 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
8809 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
8810 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
8811 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
8812 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
8813 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
8814 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
8815 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
8816 && (insn & 3) != 1)
8817 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
8818 && ((insn & 3) == 0 || (insn & 3) == 3))
8819 || (insn & (0x3f << 26)) == 12u << 26 /* addic */);
8820 }
8821
8822 /* Examine all relocs referencing .toc sections in order to remove
8823 unused .toc entries. */
8824
8825 bfd_boolean
8826 ppc64_elf_edit_toc (struct bfd_link_info *info)
8827 {
8828 bfd *ibfd;
8829 struct adjust_toc_info toc_inf;
8830 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8831
8832 htab->do_toc_opt = 1;
8833 toc_inf.global_toc_syms = TRUE;
8834 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
8835 {
8836 asection *toc, *sec;
8837 Elf_Internal_Shdr *symtab_hdr;
8838 Elf_Internal_Sym *local_syms;
8839 Elf_Internal_Rela *relstart, *rel, *toc_relocs;
8840 unsigned long *skip, *drop;
8841 unsigned char *used;
8842 unsigned char *keep, last, some_unused;
8843
8844 if (!is_ppc64_elf (ibfd))
8845 continue;
8846
8847 toc = bfd_get_section_by_name (ibfd, ".toc");
8848 if (toc == NULL
8849 || toc->size == 0
8850 || toc->sec_info_type == SEC_INFO_TYPE_JUST_SYMS
8851 || discarded_section (toc))
8852 continue;
8853
8854 toc_relocs = NULL;
8855 local_syms = NULL;
8856 symtab_hdr = &elf_symtab_hdr (ibfd);
8857
8858 /* Look at sections dropped from the final link. */
8859 skip = NULL;
8860 relstart = NULL;
8861 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8862 {
8863 if (sec->reloc_count == 0
8864 || !discarded_section (sec)
8865 || get_opd_info (sec)
8866 || (sec->flags & SEC_ALLOC) == 0
8867 || (sec->flags & SEC_DEBUGGING) != 0)
8868 continue;
8869
8870 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
8871 if (relstart == NULL)
8872 goto error_ret;
8873
8874 /* Run through the relocs to see which toc entries might be
8875 unused. */
8876 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8877 {
8878 enum elf_ppc64_reloc_type r_type;
8879 unsigned long r_symndx;
8880 asection *sym_sec;
8881 struct elf_link_hash_entry *h;
8882 Elf_Internal_Sym *sym;
8883 bfd_vma val;
8884
8885 r_type = ELF64_R_TYPE (rel->r_info);
8886 switch (r_type)
8887 {
8888 default:
8889 continue;
8890
8891 case R_PPC64_TOC16:
8892 case R_PPC64_TOC16_LO:
8893 case R_PPC64_TOC16_HI:
8894 case R_PPC64_TOC16_HA:
8895 case R_PPC64_TOC16_DS:
8896 case R_PPC64_TOC16_LO_DS:
8897 break;
8898 }
8899
8900 r_symndx = ELF64_R_SYM (rel->r_info);
8901 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8902 r_symndx, ibfd))
8903 goto error_ret;
8904
8905 if (sym_sec != toc)
8906 continue;
8907
8908 if (h != NULL)
8909 val = h->root.u.def.value;
8910 else
8911 val = sym->st_value;
8912 val += rel->r_addend;
8913
8914 if (val >= toc->size)
8915 continue;
8916
8917 /* Anything in the toc ought to be aligned to 8 bytes.
8918 If not, don't mark as unused. */
8919 if (val & 7)
8920 continue;
8921
8922 if (skip == NULL)
8923 {
8924 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
8925 if (skip == NULL)
8926 goto error_ret;
8927 }
8928
8929 skip[val >> 3] = ref_from_discarded;
8930 }
8931
8932 if (elf_section_data (sec)->relocs != relstart)
8933 free (relstart);
8934 }
8935
8936 /* For largetoc loads of address constants, we can convert
8937 . addis rx,2,addr@got@ha
8938 . ld ry,addr@got@l(rx)
8939 to
8940 . addis rx,2,addr@toc@ha
8941 . addi ry,rx,addr@toc@l
8942 when addr is within 2G of the toc pointer. This then means
8943 that the word storing "addr" in the toc is no longer needed. */
8944
8945 if (!ppc64_elf_tdata (ibfd)->has_small_toc_reloc
8946 && toc->output_section->rawsize < (bfd_vma) 1 << 31
8947 && toc->reloc_count != 0)
8948 {
8949 /* Read toc relocs. */
8950 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
8951 info->keep_memory);
8952 if (toc_relocs == NULL)
8953 goto error_ret;
8954
8955 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
8956 {
8957 enum elf_ppc64_reloc_type r_type;
8958 unsigned long r_symndx;
8959 asection *sym_sec;
8960 struct elf_link_hash_entry *h;
8961 Elf_Internal_Sym *sym;
8962 bfd_vma val, addr;
8963
8964 r_type = ELF64_R_TYPE (rel->r_info);
8965 if (r_type != R_PPC64_ADDR64)
8966 continue;
8967
8968 r_symndx = ELF64_R_SYM (rel->r_info);
8969 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8970 r_symndx, ibfd))
8971 goto error_ret;
8972
8973 if (sym_sec == NULL
8974 || sym_sec->output_section == NULL
8975 || discarded_section (sym_sec))
8976 continue;
8977
8978 if (!SYMBOL_REFERENCES_LOCAL (info, h))
8979 continue;
8980
8981 if (h != NULL)
8982 {
8983 if (h->type == STT_GNU_IFUNC)
8984 continue;
8985 val = h->root.u.def.value;
8986 }
8987 else
8988 {
8989 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
8990 continue;
8991 val = sym->st_value;
8992 }
8993 val += rel->r_addend;
8994 val += sym_sec->output_section->vma + sym_sec->output_offset;
8995
8996 /* We don't yet know the exact toc pointer value, but we
8997 know it will be somewhere in the toc section. Don't
8998 optimize if the difference from any possible toc
8999 pointer is outside [ff..f80008000, 7fff7fff]. */
9000 addr = toc->output_section->vma + TOC_BASE_OFF;
9001 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
9002 continue;
9003
9004 addr = toc->output_section->vma + toc->output_section->rawsize;
9005 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
9006 continue;
9007
9008 if (skip == NULL)
9009 {
9010 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
9011 if (skip == NULL)
9012 goto error_ret;
9013 }
9014
9015 skip[rel->r_offset >> 3]
9016 |= can_optimize | ((rel - toc_relocs) << 2);
9017 }
9018 }
9019
9020 if (skip == NULL)
9021 continue;
9022
9023 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
9024 if (used == NULL)
9025 {
9026 error_ret:
9027 if (local_syms != NULL
9028 && symtab_hdr->contents != (unsigned char *) local_syms)
9029 free (local_syms);
9030 if (sec != NULL
9031 && relstart != NULL
9032 && elf_section_data (sec)->relocs != relstart)
9033 free (relstart);
9034 if (toc_relocs != NULL
9035 && elf_section_data (toc)->relocs != toc_relocs)
9036 free (toc_relocs);
9037 if (skip != NULL)
9038 free (skip);
9039 return FALSE;
9040 }
9041
9042 /* Now check all kept sections that might reference the toc.
9043 Check the toc itself last. */
9044 for (sec = (ibfd->sections == toc && toc->next ? toc->next
9045 : ibfd->sections);
9046 sec != NULL;
9047 sec = (sec == toc ? NULL
9048 : sec->next == NULL ? toc
9049 : sec->next == toc && toc->next ? toc->next
9050 : sec->next))
9051 {
9052 int repeat;
9053
9054 if (sec->reloc_count == 0
9055 || discarded_section (sec)
9056 || get_opd_info (sec)
9057 || (sec->flags & SEC_ALLOC) == 0
9058 || (sec->flags & SEC_DEBUGGING) != 0)
9059 continue;
9060
9061 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
9062 info->keep_memory);
9063 if (relstart == NULL)
9064 {
9065 free (used);
9066 goto error_ret;
9067 }
9068
9069 /* Mark toc entries referenced as used. */
9070 do
9071 {
9072 repeat = 0;
9073 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
9074 {
9075 enum elf_ppc64_reloc_type r_type;
9076 unsigned long r_symndx;
9077 asection *sym_sec;
9078 struct elf_link_hash_entry *h;
9079 Elf_Internal_Sym *sym;
9080 bfd_vma val;
9081 enum {no_check, check_lo, check_ha} insn_check;
9082
9083 r_type = ELF64_R_TYPE (rel->r_info);
9084 switch (r_type)
9085 {
9086 default:
9087 insn_check = no_check;
9088 break;
9089
9090 case R_PPC64_GOT_TLSLD16_HA:
9091 case R_PPC64_GOT_TLSGD16_HA:
9092 case R_PPC64_GOT_TPREL16_HA:
9093 case R_PPC64_GOT_DTPREL16_HA:
9094 case R_PPC64_GOT16_HA:
9095 case R_PPC64_TOC16_HA:
9096 insn_check = check_ha;
9097 break;
9098
9099 case R_PPC64_GOT_TLSLD16_LO:
9100 case R_PPC64_GOT_TLSGD16_LO:
9101 case R_PPC64_GOT_TPREL16_LO_DS:
9102 case R_PPC64_GOT_DTPREL16_LO_DS:
9103 case R_PPC64_GOT16_LO:
9104 case R_PPC64_GOT16_LO_DS:
9105 case R_PPC64_TOC16_LO:
9106 case R_PPC64_TOC16_LO_DS:
9107 insn_check = check_lo;
9108 break;
9109 }
9110
9111 if (insn_check != no_check)
9112 {
9113 bfd_vma off = rel->r_offset & ~3;
9114 unsigned char buf[4];
9115 unsigned int insn;
9116
9117 if (!bfd_get_section_contents (ibfd, sec, buf, off, 4))
9118 {
9119 free (used);
9120 goto error_ret;
9121 }
9122 insn = bfd_get_32 (ibfd, buf);
9123 if (insn_check == check_lo
9124 ? !ok_lo_toc_insn (insn)
9125 : ((insn & ((0x3f << 26) | 0x1f << 16))
9126 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */))
9127 {
9128 char str[12];
9129
9130 ppc64_elf_tdata (ibfd)->unexpected_toc_insn = 1;
9131 sprintf (str, "%#08x", insn);
9132 info->callbacks->einfo
9133 (_("%P: %H: toc optimization is not supported for"
9134 " %s instruction.\n"),
9135 ibfd, sec, rel->r_offset & ~3, str);
9136 }
9137 }
9138
9139 switch (r_type)
9140 {
9141 case R_PPC64_TOC16:
9142 case R_PPC64_TOC16_LO:
9143 case R_PPC64_TOC16_HI:
9144 case R_PPC64_TOC16_HA:
9145 case R_PPC64_TOC16_DS:
9146 case R_PPC64_TOC16_LO_DS:
9147 /* In case we're taking addresses of toc entries. */
9148 case R_PPC64_ADDR64:
9149 break;
9150
9151 default:
9152 continue;
9153 }
9154
9155 r_symndx = ELF64_R_SYM (rel->r_info);
9156 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9157 r_symndx, ibfd))
9158 {
9159 free (used);
9160 goto error_ret;
9161 }
9162
9163 if (sym_sec != toc)
9164 continue;
9165
9166 if (h != NULL)
9167 val = h->root.u.def.value;
9168 else
9169 val = sym->st_value;
9170 val += rel->r_addend;
9171
9172 if (val >= toc->size)
9173 continue;
9174
9175 if ((skip[val >> 3] & can_optimize) != 0)
9176 {
9177 bfd_vma off;
9178 unsigned char opc;
9179
9180 switch (r_type)
9181 {
9182 case R_PPC64_TOC16_HA:
9183 break;
9184
9185 case R_PPC64_TOC16_LO_DS:
9186 off = rel->r_offset;
9187 off += (bfd_big_endian (ibfd) ? -2 : 3);
9188 if (!bfd_get_section_contents (ibfd, sec, &opc,
9189 off, 1))
9190 {
9191 free (used);
9192 goto error_ret;
9193 }
9194 if ((opc & (0x3f << 2)) == (58u << 2))
9195 break;
9196 /* Fall thru */
9197
9198 default:
9199 /* Wrong sort of reloc, or not a ld. We may
9200 as well clear ref_from_discarded too. */
9201 skip[val >> 3] = 0;
9202 }
9203 }
9204
9205 if (sec != toc)
9206 used[val >> 3] = 1;
9207 /* For the toc section, we only mark as used if this
9208 entry itself isn't unused. */
9209 else if ((used[rel->r_offset >> 3]
9210 || !(skip[rel->r_offset >> 3] & ref_from_discarded))
9211 && !used[val >> 3])
9212 {
9213 /* Do all the relocs again, to catch reference
9214 chains. */
9215 repeat = 1;
9216 used[val >> 3] = 1;
9217 }
9218 }
9219 }
9220 while (repeat);
9221
9222 if (elf_section_data (sec)->relocs != relstart)
9223 free (relstart);
9224 }
9225
9226 /* Merge the used and skip arrays. Assume that TOC
9227 doublewords not appearing as either used or unused belong
9228 to to an entry more than one doubleword in size. */
9229 for (drop = skip, keep = used, last = 0, some_unused = 0;
9230 drop < skip + (toc->size + 7) / 8;
9231 ++drop, ++keep)
9232 {
9233 if (*keep)
9234 {
9235 *drop &= ~ref_from_discarded;
9236 if ((*drop & can_optimize) != 0)
9237 some_unused = 1;
9238 last = 0;
9239 }
9240 else if ((*drop & ref_from_discarded) != 0)
9241 {
9242 some_unused = 1;
9243 last = ref_from_discarded;
9244 }
9245 else
9246 *drop = last;
9247 }
9248
9249 free (used);
9250
9251 if (some_unused)
9252 {
9253 bfd_byte *contents, *src;
9254 unsigned long off;
9255 Elf_Internal_Sym *sym;
9256 bfd_boolean local_toc_syms = FALSE;
9257
9258 /* Shuffle the toc contents, and at the same time convert the
9259 skip array from booleans into offsets. */
9260 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
9261 goto error_ret;
9262
9263 elf_section_data (toc)->this_hdr.contents = contents;
9264
9265 for (src = contents, off = 0, drop = skip;
9266 src < contents + toc->size;
9267 src += 8, ++drop)
9268 {
9269 if ((*drop & (can_optimize | ref_from_discarded)) != 0)
9270 off += 8;
9271 else if (off != 0)
9272 {
9273 *drop = off;
9274 memcpy (src - off, src, 8);
9275 }
9276 }
9277 *drop = off;
9278 toc->rawsize = toc->size;
9279 toc->size = src - contents - off;
9280
9281 /* Adjust addends for relocs against the toc section sym,
9282 and optimize any accesses we can. */
9283 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
9284 {
9285 if (sec->reloc_count == 0
9286 || discarded_section (sec))
9287 continue;
9288
9289 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
9290 info->keep_memory);
9291 if (relstart == NULL)
9292 goto error_ret;
9293
9294 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
9295 {
9296 enum elf_ppc64_reloc_type r_type;
9297 unsigned long r_symndx;
9298 asection *sym_sec;
9299 struct elf_link_hash_entry *h;
9300 bfd_vma val;
9301
9302 r_type = ELF64_R_TYPE (rel->r_info);
9303 switch (r_type)
9304 {
9305 default:
9306 continue;
9307
9308 case R_PPC64_TOC16:
9309 case R_PPC64_TOC16_LO:
9310 case R_PPC64_TOC16_HI:
9311 case R_PPC64_TOC16_HA:
9312 case R_PPC64_TOC16_DS:
9313 case R_PPC64_TOC16_LO_DS:
9314 case R_PPC64_ADDR64:
9315 break;
9316 }
9317
9318 r_symndx = ELF64_R_SYM (rel->r_info);
9319 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9320 r_symndx, ibfd))
9321 goto error_ret;
9322
9323 if (sym_sec != toc)
9324 continue;
9325
9326 if (h != NULL)
9327 val = h->root.u.def.value;
9328 else
9329 {
9330 val = sym->st_value;
9331 if (val != 0)
9332 local_toc_syms = TRUE;
9333 }
9334
9335 val += rel->r_addend;
9336
9337 if (val > toc->rawsize)
9338 val = toc->rawsize;
9339 else if ((skip[val >> 3] & ref_from_discarded) != 0)
9340 continue;
9341 else if ((skip[val >> 3] & can_optimize) != 0)
9342 {
9343 Elf_Internal_Rela *tocrel
9344 = toc_relocs + (skip[val >> 3] >> 2);
9345 unsigned long tsym = ELF64_R_SYM (tocrel->r_info);
9346
9347 switch (r_type)
9348 {
9349 case R_PPC64_TOC16_HA:
9350 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_TOC16_HA);
9351 break;
9352
9353 case R_PPC64_TOC16_LO_DS:
9354 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_LO_DS_OPT);
9355 break;
9356
9357 default:
9358 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
9359 ppc_howto_init ();
9360 info->callbacks->einfo
9361 (_("%P: %H: %s references "
9362 "optimized away TOC entry\n"),
9363 ibfd, sec, rel->r_offset,
9364 ppc64_elf_howto_table[r_type]->name);
9365 bfd_set_error (bfd_error_bad_value);
9366 goto error_ret;
9367 }
9368 rel->r_addend = tocrel->r_addend;
9369 elf_section_data (sec)->relocs = relstart;
9370 continue;
9371 }
9372
9373 if (h != NULL || sym->st_value != 0)
9374 continue;
9375
9376 rel->r_addend -= skip[val >> 3];
9377 elf_section_data (sec)->relocs = relstart;
9378 }
9379
9380 if (elf_section_data (sec)->relocs != relstart)
9381 free (relstart);
9382 }
9383
9384 /* We shouldn't have local or global symbols defined in the TOC,
9385 but handle them anyway. */
9386 if (local_syms != NULL)
9387 for (sym = local_syms;
9388 sym < local_syms + symtab_hdr->sh_info;
9389 ++sym)
9390 if (sym->st_value != 0
9391 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
9392 {
9393 unsigned long i;
9394
9395 if (sym->st_value > toc->rawsize)
9396 i = toc->rawsize >> 3;
9397 else
9398 i = sym->st_value >> 3;
9399
9400 if ((skip[i] & (ref_from_discarded | can_optimize)) != 0)
9401 {
9402 if (local_toc_syms)
9403 (*_bfd_error_handler)
9404 (_("%s defined on removed toc entry"),
9405 bfd_elf_sym_name (ibfd, symtab_hdr, sym, NULL));
9406 do
9407 ++i;
9408 while ((skip[i] & (ref_from_discarded | can_optimize)));
9409 sym->st_value = (bfd_vma) i << 3;
9410 }
9411
9412 sym->st_value -= skip[i];
9413 symtab_hdr->contents = (unsigned char *) local_syms;
9414 }
9415
9416 /* Adjust any global syms defined in this toc input section. */
9417 if (toc_inf.global_toc_syms)
9418 {
9419 toc_inf.toc = toc;
9420 toc_inf.skip = skip;
9421 toc_inf.global_toc_syms = FALSE;
9422 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
9423 &toc_inf);
9424 }
9425
9426 if (toc->reloc_count != 0)
9427 {
9428 Elf_Internal_Shdr *rel_hdr;
9429 Elf_Internal_Rela *wrel;
9430 bfd_size_type sz;
9431
9432 /* Remove unused toc relocs, and adjust those we keep. */
9433 if (toc_relocs == NULL)
9434 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
9435 info->keep_memory);
9436 if (toc_relocs == NULL)
9437 goto error_ret;
9438
9439 wrel = toc_relocs;
9440 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
9441 if ((skip[rel->r_offset >> 3]
9442 & (ref_from_discarded | can_optimize)) == 0)
9443 {
9444 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
9445 wrel->r_info = rel->r_info;
9446 wrel->r_addend = rel->r_addend;
9447 ++wrel;
9448 }
9449 else if (!dec_dynrel_count (rel->r_info, toc, info,
9450 &local_syms, NULL, NULL))
9451 goto error_ret;
9452
9453 elf_section_data (toc)->relocs = toc_relocs;
9454 toc->reloc_count = wrel - toc_relocs;
9455 rel_hdr = _bfd_elf_single_rel_hdr (toc);
9456 sz = rel_hdr->sh_entsize;
9457 rel_hdr->sh_size = toc->reloc_count * sz;
9458 }
9459 }
9460 else if (toc_relocs != NULL
9461 && elf_section_data (toc)->relocs != toc_relocs)
9462 free (toc_relocs);
9463
9464 if (local_syms != NULL
9465 && symtab_hdr->contents != (unsigned char *) local_syms)
9466 {
9467 if (!info->keep_memory)
9468 free (local_syms);
9469 else
9470 symtab_hdr->contents = (unsigned char *) local_syms;
9471 }
9472 free (skip);
9473 }
9474
9475 return TRUE;
9476 }
9477
9478 /* Return true iff input section I references the TOC using
9479 instructions limited to +/-32k offsets. */
9480
9481 bfd_boolean
9482 ppc64_elf_has_small_toc_reloc (asection *i)
9483 {
9484 return (is_ppc64_elf (i->owner)
9485 && ppc64_elf_tdata (i->owner)->has_small_toc_reloc);
9486 }
9487
9488 /* Allocate space for one GOT entry. */
9489
9490 static void
9491 allocate_got (struct elf_link_hash_entry *h,
9492 struct bfd_link_info *info,
9493 struct got_entry *gent)
9494 {
9495 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9496 bfd_boolean dyn;
9497 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
9498 int entsize = (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)
9499 ? 16 : 8);
9500 int rentsize = (gent->tls_type & eh->tls_mask & TLS_GD
9501 ? 2 : 1) * sizeof (Elf64_External_Rela);
9502 asection *got = ppc64_elf_tdata (gent->owner)->got;
9503
9504 gent->got.offset = got->size;
9505 got->size += entsize;
9506
9507 dyn = htab->elf.dynamic_sections_created;
9508 if (h->type == STT_GNU_IFUNC)
9509 {
9510 htab->elf.irelplt->size += rentsize;
9511 htab->got_reli_size += rentsize;
9512 }
9513 else if ((bfd_link_pic (info)
9514 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
9515 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
9516 || h->root.type != bfd_link_hash_undefweak))
9517 {
9518 asection *relgot = ppc64_elf_tdata (gent->owner)->relgot;
9519 relgot->size += rentsize;
9520 }
9521 }
9522
9523 /* This function merges got entries in the same toc group. */
9524
9525 static void
9526 merge_got_entries (struct got_entry **pent)
9527 {
9528 struct got_entry *ent, *ent2;
9529
9530 for (ent = *pent; ent != NULL; ent = ent->next)
9531 if (!ent->is_indirect)
9532 for (ent2 = ent->next; ent2 != NULL; ent2 = ent2->next)
9533 if (!ent2->is_indirect
9534 && ent2->addend == ent->addend
9535 && ent2->tls_type == ent->tls_type
9536 && elf_gp (ent2->owner) == elf_gp (ent->owner))
9537 {
9538 ent2->is_indirect = TRUE;
9539 ent2->got.ent = ent;
9540 }
9541 }
9542
9543 /* Allocate space in .plt, .got and associated reloc sections for
9544 dynamic relocs. */
9545
9546 static bfd_boolean
9547 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
9548 {
9549 struct bfd_link_info *info;
9550 struct ppc_link_hash_table *htab;
9551 asection *s;
9552 struct ppc_link_hash_entry *eh;
9553 struct got_entry **pgent, *gent;
9554
9555 if (h->root.type == bfd_link_hash_indirect)
9556 return TRUE;
9557
9558 info = (struct bfd_link_info *) inf;
9559 htab = ppc_hash_table (info);
9560 if (htab == NULL)
9561 return FALSE;
9562
9563 eh = (struct ppc_link_hash_entry *) h;
9564 /* Run through the TLS GD got entries first if we're changing them
9565 to TPREL. */
9566 if ((eh->tls_mask & TLS_TPRELGD) != 0)
9567 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9568 if (gent->got.refcount > 0
9569 && (gent->tls_type & TLS_GD) != 0)
9570 {
9571 /* This was a GD entry that has been converted to TPREL. If
9572 there happens to be a TPREL entry we can use that one. */
9573 struct got_entry *ent;
9574 for (ent = h->got.glist; ent != NULL; ent = ent->next)
9575 if (ent->got.refcount > 0
9576 && (ent->tls_type & TLS_TPREL) != 0
9577 && ent->addend == gent->addend
9578 && ent->owner == gent->owner)
9579 {
9580 gent->got.refcount = 0;
9581 break;
9582 }
9583
9584 /* If not, then we'll be using our own TPREL entry. */
9585 if (gent->got.refcount != 0)
9586 gent->tls_type = TLS_TLS | TLS_TPREL;
9587 }
9588
9589 /* Remove any list entry that won't generate a word in the GOT before
9590 we call merge_got_entries. Otherwise we risk merging to empty
9591 entries. */
9592 pgent = &h->got.glist;
9593 while ((gent = *pgent) != NULL)
9594 if (gent->got.refcount > 0)
9595 {
9596 if ((gent->tls_type & TLS_LD) != 0
9597 && !h->def_dynamic)
9598 {
9599 ppc64_tlsld_got (gent->owner)->got.refcount += 1;
9600 *pgent = gent->next;
9601 }
9602 else
9603 pgent = &gent->next;
9604 }
9605 else
9606 *pgent = gent->next;
9607
9608 if (!htab->do_multi_toc)
9609 merge_got_entries (&h->got.glist);
9610
9611 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9612 if (!gent->is_indirect)
9613 {
9614 /* Make sure this symbol is output as a dynamic symbol.
9615 Undefined weak syms won't yet be marked as dynamic,
9616 nor will all TLS symbols. */
9617 if (h->dynindx == -1
9618 && !h->forced_local
9619 && h->type != STT_GNU_IFUNC
9620 && htab->elf.dynamic_sections_created)
9621 {
9622 if (! bfd_elf_link_record_dynamic_symbol (info, h))
9623 return FALSE;
9624 }
9625
9626 if (!is_ppc64_elf (gent->owner))
9627 abort ();
9628
9629 allocate_got (h, info, gent);
9630 }
9631
9632 if (!htab->elf.dynamic_sections_created
9633 && h->type != STT_GNU_IFUNC)
9634 eh->dyn_relocs = NULL;
9635
9636 if (eh->dyn_relocs != NULL)
9637 {
9638 struct elf_dyn_relocs *p, **pp;
9639
9640 /* In the shared -Bsymbolic case, discard space allocated for
9641 dynamic pc-relative relocs against symbols which turn out to
9642 be defined in regular objects. For the normal shared case,
9643 discard space for relocs that have become local due to symbol
9644 visibility changes. */
9645
9646 if (bfd_link_pic (info))
9647 {
9648 /* Relocs that use pc_count are those that appear on a call
9649 insn, or certain REL relocs (see must_be_dyn_reloc) that
9650 can be generated via assembly. We want calls to
9651 protected symbols to resolve directly to the function
9652 rather than going via the plt. If people want function
9653 pointer comparisons to work as expected then they should
9654 avoid writing weird assembly. */
9655 if (SYMBOL_CALLS_LOCAL (info, h))
9656 {
9657 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
9658 {
9659 p->count -= p->pc_count;
9660 p->pc_count = 0;
9661 if (p->count == 0)
9662 *pp = p->next;
9663 else
9664 pp = &p->next;
9665 }
9666 }
9667
9668 /* Also discard relocs on undefined weak syms with
9669 non-default visibility. */
9670 if (eh->dyn_relocs != NULL
9671 && h->root.type == bfd_link_hash_undefweak)
9672 {
9673 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
9674 eh->dyn_relocs = NULL;
9675
9676 /* Make sure this symbol is output as a dynamic symbol.
9677 Undefined weak syms won't yet be marked as dynamic. */
9678 else if (h->dynindx == -1
9679 && !h->forced_local)
9680 {
9681 if (! bfd_elf_link_record_dynamic_symbol (info, h))
9682 return FALSE;
9683 }
9684 }
9685 }
9686 else if (h->type == STT_GNU_IFUNC)
9687 {
9688 /* A plt entry is always created when making direct calls to
9689 an ifunc, even when building a static executable, but
9690 that doesn't cover all cases. We may have only an ifunc
9691 initialised function pointer for a given ifunc symbol.
9692
9693 For ELFv2, dynamic relocations are not required when
9694 generating a global entry PLT stub. */
9695 if (abiversion (info->output_bfd) >= 2)
9696 {
9697 if (global_entry_stub (h))
9698 eh->dyn_relocs = NULL;
9699 }
9700
9701 /* For ELFv1 we have function descriptors. Descriptors need
9702 to be treated like PLT entries and thus have dynamic
9703 relocations. One exception is when the function
9704 descriptor is copied into .dynbss (which should only
9705 happen with ancient versions of gcc). */
9706 else if (h->needs_copy)
9707 eh->dyn_relocs = NULL;
9708 }
9709 else if (ELIMINATE_COPY_RELOCS)
9710 {
9711 /* For the non-pic case, discard space for relocs against
9712 symbols which turn out to need copy relocs or are not
9713 dynamic. */
9714
9715 /* First make sure this symbol is output as a dynamic symbol.
9716 Undefined weak syms won't yet be marked as dynamic. */
9717 if (h->root.type == bfd_link_hash_undefweak
9718 && !h->non_got_ref
9719 && !h->def_regular
9720 && h->dynindx == -1
9721 && !h->forced_local
9722 && !bfd_elf_link_record_dynamic_symbol (info, h))
9723 return FALSE;
9724
9725 if (h->non_got_ref
9726 || h->def_regular
9727 || h->dynindx == -1)
9728 eh->dyn_relocs = NULL;
9729 }
9730
9731 /* Finally, allocate space. */
9732 for (p = eh->dyn_relocs; p != NULL; p = p->next)
9733 {
9734 asection *sreloc = elf_section_data (p->sec)->sreloc;
9735 if (eh->elf.type == STT_GNU_IFUNC)
9736 sreloc = htab->elf.irelplt;
9737 sreloc->size += p->count * sizeof (Elf64_External_Rela);
9738 }
9739 }
9740
9741 if ((htab->elf.dynamic_sections_created
9742 && h->dynindx != -1
9743 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, bfd_link_pic (info), h))
9744 || h->type == STT_GNU_IFUNC)
9745 {
9746 struct plt_entry *pent;
9747 bfd_boolean doneone = FALSE;
9748 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
9749 if (pent->plt.refcount > 0)
9750 {
9751 if (!htab->elf.dynamic_sections_created
9752 || h->dynindx == -1)
9753 {
9754 s = htab->elf.iplt;
9755 pent->plt.offset = s->size;
9756 s->size += PLT_ENTRY_SIZE (htab);
9757 s = htab->elf.irelplt;
9758 }
9759 else
9760 {
9761 /* If this is the first .plt entry, make room for the special
9762 first entry. */
9763 s = htab->elf.splt;
9764 if (s->size == 0)
9765 s->size += PLT_INITIAL_ENTRY_SIZE (htab);
9766
9767 pent->plt.offset = s->size;
9768
9769 /* Make room for this entry. */
9770 s->size += PLT_ENTRY_SIZE (htab);
9771
9772 /* Make room for the .glink code. */
9773 s = htab->glink;
9774 if (s->size == 0)
9775 s->size += GLINK_CALL_STUB_SIZE;
9776 if (htab->opd_abi)
9777 {
9778 /* We need bigger stubs past index 32767. */
9779 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
9780 s->size += 4;
9781 s->size += 2*4;
9782 }
9783 else
9784 s->size += 4;
9785
9786 /* We also need to make an entry in the .rela.plt section. */
9787 s = htab->elf.srelplt;
9788 }
9789 s->size += sizeof (Elf64_External_Rela);
9790 doneone = TRUE;
9791 }
9792 else
9793 pent->plt.offset = (bfd_vma) -1;
9794 if (!doneone)
9795 {
9796 h->plt.plist = NULL;
9797 h->needs_plt = 0;
9798 }
9799 }
9800 else
9801 {
9802 h->plt.plist = NULL;
9803 h->needs_plt = 0;
9804 }
9805
9806 return TRUE;
9807 }
9808
9809 /* Called via elf_link_hash_traverse from ppc64_elf_size_dynamic_sections
9810 to set up space for global entry stubs. These are put in glink,
9811 after the branch table. */
9812
9813 static bfd_boolean
9814 size_global_entry_stubs (struct elf_link_hash_entry *h, void *inf)
9815 {
9816 struct bfd_link_info *info;
9817 struct ppc_link_hash_table *htab;
9818 struct plt_entry *pent;
9819 asection *s;
9820
9821 if (h->root.type == bfd_link_hash_indirect)
9822 return TRUE;
9823
9824 if (!h->pointer_equality_needed)
9825 return TRUE;
9826
9827 if (h->def_regular)
9828 return TRUE;
9829
9830 info = inf;
9831 htab = ppc_hash_table (info);
9832 if (htab == NULL)
9833 return FALSE;
9834
9835 s = htab->glink;
9836 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
9837 if (pent->plt.offset != (bfd_vma) -1
9838 && pent->addend == 0)
9839 {
9840 /* For ELFv2, if this symbol is not defined in a regular file
9841 and we are not generating a shared library or pie, then we
9842 need to define the symbol in the executable on a call stub.
9843 This is to avoid text relocations. */
9844 s->size = (s->size + 15) & -16;
9845 h->root.type = bfd_link_hash_defined;
9846 h->root.u.def.section = s;
9847 h->root.u.def.value = s->size;
9848 s->size += 16;
9849 break;
9850 }
9851 return TRUE;
9852 }
9853
9854 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
9855 read-only sections. */
9856
9857 static bfd_boolean
9858 maybe_set_textrel (struct elf_link_hash_entry *h, void *info)
9859 {
9860 if (h->root.type == bfd_link_hash_indirect)
9861 return TRUE;
9862
9863 if (readonly_dynrelocs (h))
9864 {
9865 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
9866
9867 /* Not an error, just cut short the traversal. */
9868 return FALSE;
9869 }
9870 return TRUE;
9871 }
9872
9873 /* Set the sizes of the dynamic sections. */
9874
9875 static bfd_boolean
9876 ppc64_elf_size_dynamic_sections (bfd *output_bfd,
9877 struct bfd_link_info *info)
9878 {
9879 struct ppc_link_hash_table *htab;
9880 bfd *dynobj;
9881 asection *s;
9882 bfd_boolean relocs;
9883 bfd *ibfd;
9884 struct got_entry *first_tlsld;
9885
9886 htab = ppc_hash_table (info);
9887 if (htab == NULL)
9888 return FALSE;
9889
9890 dynobj = htab->elf.dynobj;
9891 if (dynobj == NULL)
9892 abort ();
9893
9894 if (htab->elf.dynamic_sections_created)
9895 {
9896 /* Set the contents of the .interp section to the interpreter. */
9897 if (bfd_link_executable (info) && !info->nointerp)
9898 {
9899 s = bfd_get_linker_section (dynobj, ".interp");
9900 if (s == NULL)
9901 abort ();
9902 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
9903 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
9904 }
9905 }
9906
9907 /* Set up .got offsets for local syms, and space for local dynamic
9908 relocs. */
9909 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
9910 {
9911 struct got_entry **lgot_ents;
9912 struct got_entry **end_lgot_ents;
9913 struct plt_entry **local_plt;
9914 struct plt_entry **end_local_plt;
9915 unsigned char *lgot_masks;
9916 bfd_size_type locsymcount;
9917 Elf_Internal_Shdr *symtab_hdr;
9918
9919 if (!is_ppc64_elf (ibfd))
9920 continue;
9921
9922 for (s = ibfd->sections; s != NULL; s = s->next)
9923 {
9924 struct ppc_dyn_relocs *p;
9925
9926 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
9927 {
9928 if (!bfd_is_abs_section (p->sec)
9929 && bfd_is_abs_section (p->sec->output_section))
9930 {
9931 /* Input section has been discarded, either because
9932 it is a copy of a linkonce section or due to
9933 linker script /DISCARD/, so we'll be discarding
9934 the relocs too. */
9935 }
9936 else if (p->count != 0)
9937 {
9938 asection *srel = elf_section_data (p->sec)->sreloc;
9939 if (p->ifunc)
9940 srel = htab->elf.irelplt;
9941 srel->size += p->count * sizeof (Elf64_External_Rela);
9942 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
9943 info->flags |= DF_TEXTREL;
9944 }
9945 }
9946 }
9947
9948 lgot_ents = elf_local_got_ents (ibfd);
9949 if (!lgot_ents)
9950 continue;
9951
9952 symtab_hdr = &elf_symtab_hdr (ibfd);
9953 locsymcount = symtab_hdr->sh_info;
9954 end_lgot_ents = lgot_ents + locsymcount;
9955 local_plt = (struct plt_entry **) end_lgot_ents;
9956 end_local_plt = local_plt + locsymcount;
9957 lgot_masks = (unsigned char *) end_local_plt;
9958 s = ppc64_elf_tdata (ibfd)->got;
9959 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
9960 {
9961 struct got_entry **pent, *ent;
9962
9963 pent = lgot_ents;
9964 while ((ent = *pent) != NULL)
9965 if (ent->got.refcount > 0)
9966 {
9967 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
9968 {
9969 ppc64_tlsld_got (ibfd)->got.refcount += 1;
9970 *pent = ent->next;
9971 }
9972 else
9973 {
9974 unsigned int ent_size = 8;
9975 unsigned int rel_size = sizeof (Elf64_External_Rela);
9976
9977 ent->got.offset = s->size;
9978 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
9979 {
9980 ent_size *= 2;
9981 rel_size *= 2;
9982 }
9983 s->size += ent_size;
9984 if ((*lgot_masks & PLT_IFUNC) != 0)
9985 {
9986 htab->elf.irelplt->size += rel_size;
9987 htab->got_reli_size += rel_size;
9988 }
9989 else if (bfd_link_pic (info))
9990 {
9991 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
9992 srel->size += rel_size;
9993 }
9994 pent = &ent->next;
9995 }
9996 }
9997 else
9998 *pent = ent->next;
9999 }
10000
10001 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
10002 for (; local_plt < end_local_plt; ++local_plt)
10003 {
10004 struct plt_entry *ent;
10005
10006 for (ent = *local_plt; ent != NULL; ent = ent->next)
10007 if (ent->plt.refcount > 0)
10008 {
10009 s = htab->elf.iplt;
10010 ent->plt.offset = s->size;
10011 s->size += PLT_ENTRY_SIZE (htab);
10012
10013 htab->elf.irelplt->size += sizeof (Elf64_External_Rela);
10014 }
10015 else
10016 ent->plt.offset = (bfd_vma) -1;
10017 }
10018 }
10019
10020 /* Allocate global sym .plt and .got entries, and space for global
10021 sym dynamic relocs. */
10022 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
10023 /* Stash the end of glink branch table. */
10024 if (htab->glink != NULL)
10025 htab->glink->rawsize = htab->glink->size;
10026
10027 if (!htab->opd_abi && !bfd_link_pic (info))
10028 elf_link_hash_traverse (&htab->elf, size_global_entry_stubs, info);
10029
10030 first_tlsld = NULL;
10031 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
10032 {
10033 struct got_entry *ent;
10034
10035 if (!is_ppc64_elf (ibfd))
10036 continue;
10037
10038 ent = ppc64_tlsld_got (ibfd);
10039 if (ent->got.refcount > 0)
10040 {
10041 if (!htab->do_multi_toc && first_tlsld != NULL)
10042 {
10043 ent->is_indirect = TRUE;
10044 ent->got.ent = first_tlsld;
10045 }
10046 else
10047 {
10048 if (first_tlsld == NULL)
10049 first_tlsld = ent;
10050 s = ppc64_elf_tdata (ibfd)->got;
10051 ent->got.offset = s->size;
10052 ent->owner = ibfd;
10053 s->size += 16;
10054 if (bfd_link_pic (info))
10055 {
10056 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
10057 srel->size += sizeof (Elf64_External_Rela);
10058 }
10059 }
10060 }
10061 else
10062 ent->got.offset = (bfd_vma) -1;
10063 }
10064
10065 /* We now have determined the sizes of the various dynamic sections.
10066 Allocate memory for them. */
10067 relocs = FALSE;
10068 for (s = dynobj->sections; s != NULL; s = s->next)
10069 {
10070 if ((s->flags & SEC_LINKER_CREATED) == 0)
10071 continue;
10072
10073 if (s == htab->brlt || s == htab->relbrlt)
10074 /* These haven't been allocated yet; don't strip. */
10075 continue;
10076 else if (s == htab->elf.sgot
10077 || s == htab->elf.splt
10078 || s == htab->elf.iplt
10079 || s == htab->glink
10080 || s == htab->dynbss)
10081 {
10082 /* Strip this section if we don't need it; see the
10083 comment below. */
10084 }
10085 else if (s == htab->glink_eh_frame)
10086 {
10087 if (!bfd_is_abs_section (s->output_section))
10088 /* Not sized yet. */
10089 continue;
10090 }
10091 else if (CONST_STRNEQ (s->name, ".rela"))
10092 {
10093 if (s->size != 0)
10094 {
10095 if (s != htab->elf.srelplt)
10096 relocs = TRUE;
10097
10098 /* We use the reloc_count field as a counter if we need
10099 to copy relocs into the output file. */
10100 s->reloc_count = 0;
10101 }
10102 }
10103 else
10104 {
10105 /* It's not one of our sections, so don't allocate space. */
10106 continue;
10107 }
10108
10109 if (s->size == 0)
10110 {
10111 /* If we don't need this section, strip it from the
10112 output file. This is mostly to handle .rela.bss and
10113 .rela.plt. We must create both sections in
10114 create_dynamic_sections, because they must be created
10115 before the linker maps input sections to output
10116 sections. The linker does that before
10117 adjust_dynamic_symbol is called, and it is that
10118 function which decides whether anything needs to go
10119 into these sections. */
10120 s->flags |= SEC_EXCLUDE;
10121 continue;
10122 }
10123
10124 if ((s->flags & SEC_HAS_CONTENTS) == 0)
10125 continue;
10126
10127 /* Allocate memory for the section contents. We use bfd_zalloc
10128 here in case unused entries are not reclaimed before the
10129 section's contents are written out. This should not happen,
10130 but this way if it does we get a R_PPC64_NONE reloc in .rela
10131 sections instead of garbage.
10132 We also rely on the section contents being zero when writing
10133 the GOT. */
10134 s->contents = bfd_zalloc (dynobj, s->size);
10135 if (s->contents == NULL)
10136 return FALSE;
10137 }
10138
10139 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
10140 {
10141 if (!is_ppc64_elf (ibfd))
10142 continue;
10143
10144 s = ppc64_elf_tdata (ibfd)->got;
10145 if (s != NULL && s != htab->elf.sgot)
10146 {
10147 if (s->size == 0)
10148 s->flags |= SEC_EXCLUDE;
10149 else
10150 {
10151 s->contents = bfd_zalloc (ibfd, s->size);
10152 if (s->contents == NULL)
10153 return FALSE;
10154 }
10155 }
10156 s = ppc64_elf_tdata (ibfd)->relgot;
10157 if (s != NULL)
10158 {
10159 if (s->size == 0)
10160 s->flags |= SEC_EXCLUDE;
10161 else
10162 {
10163 s->contents = bfd_zalloc (ibfd, s->size);
10164 if (s->contents == NULL)
10165 return FALSE;
10166 relocs = TRUE;
10167 s->reloc_count = 0;
10168 }
10169 }
10170 }
10171
10172 if (htab->elf.dynamic_sections_created)
10173 {
10174 bfd_boolean tls_opt;
10175
10176 /* Add some entries to the .dynamic section. We fill in the
10177 values later, in ppc64_elf_finish_dynamic_sections, but we
10178 must add the entries now so that we get the correct size for
10179 the .dynamic section. The DT_DEBUG entry is filled in by the
10180 dynamic linker and used by the debugger. */
10181 #define add_dynamic_entry(TAG, VAL) \
10182 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
10183
10184 if (bfd_link_executable (info))
10185 {
10186 if (!add_dynamic_entry (DT_DEBUG, 0))
10187 return FALSE;
10188 }
10189
10190 if (htab->elf.splt != NULL && htab->elf.splt->size != 0)
10191 {
10192 if (!add_dynamic_entry (DT_PLTGOT, 0)
10193 || !add_dynamic_entry (DT_PLTRELSZ, 0)
10194 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
10195 || !add_dynamic_entry (DT_JMPREL, 0)
10196 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
10197 return FALSE;
10198 }
10199
10200 if (NO_OPD_RELOCS && abiversion (output_bfd) <= 1)
10201 {
10202 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
10203 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
10204 return FALSE;
10205 }
10206
10207 tls_opt = (htab->params->tls_get_addr_opt
10208 && htab->tls_get_addr_fd != NULL
10209 && htab->tls_get_addr_fd->elf.plt.plist != NULL);
10210 if (tls_opt || !htab->opd_abi)
10211 {
10212 if (!add_dynamic_entry (DT_PPC64_OPT, tls_opt ? PPC64_OPT_TLS : 0))
10213 return FALSE;
10214 }
10215
10216 if (relocs)
10217 {
10218 if (!add_dynamic_entry (DT_RELA, 0)
10219 || !add_dynamic_entry (DT_RELASZ, 0)
10220 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
10221 return FALSE;
10222
10223 /* If any dynamic relocs apply to a read-only section,
10224 then we need a DT_TEXTREL entry. */
10225 if ((info->flags & DF_TEXTREL) == 0)
10226 elf_link_hash_traverse (&htab->elf, maybe_set_textrel, info);
10227
10228 if ((info->flags & DF_TEXTREL) != 0)
10229 {
10230 if (!add_dynamic_entry (DT_TEXTREL, 0))
10231 return FALSE;
10232 }
10233 }
10234 }
10235 #undef add_dynamic_entry
10236
10237 return TRUE;
10238 }
10239
10240 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
10241
10242 static bfd_boolean
10243 ppc64_elf_hash_symbol (struct elf_link_hash_entry *h)
10244 {
10245 if (h->plt.plist != NULL
10246 && !h->def_regular
10247 && !h->pointer_equality_needed)
10248 return FALSE;
10249
10250 return _bfd_elf_hash_symbol (h);
10251 }
10252
10253 /* Determine the type of stub needed, if any, for a call. */
10254
10255 static inline enum ppc_stub_type
10256 ppc_type_of_stub (asection *input_sec,
10257 const Elf_Internal_Rela *rel,
10258 struct ppc_link_hash_entry **hash,
10259 struct plt_entry **plt_ent,
10260 bfd_vma destination,
10261 unsigned long local_off)
10262 {
10263 struct ppc_link_hash_entry *h = *hash;
10264 bfd_vma location;
10265 bfd_vma branch_offset;
10266 bfd_vma max_branch_offset;
10267 enum elf_ppc64_reloc_type r_type;
10268
10269 if (h != NULL)
10270 {
10271 struct plt_entry *ent;
10272 struct ppc_link_hash_entry *fdh = h;
10273 if (h->oh != NULL
10274 && h->oh->is_func_descriptor)
10275 {
10276 fdh = ppc_follow_link (h->oh);
10277 *hash = fdh;
10278 }
10279
10280 for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next)
10281 if (ent->addend == rel->r_addend
10282 && ent->plt.offset != (bfd_vma) -1)
10283 {
10284 *plt_ent = ent;
10285 return ppc_stub_plt_call;
10286 }
10287
10288 /* Here, we know we don't have a plt entry. If we don't have a
10289 either a defined function descriptor or a defined entry symbol
10290 in a regular object file, then it is pointless trying to make
10291 any other type of stub. */
10292 if (!is_static_defined (&fdh->elf)
10293 && !is_static_defined (&h->elf))
10294 return ppc_stub_none;
10295 }
10296 else if (elf_local_got_ents (input_sec->owner) != NULL)
10297 {
10298 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (input_sec->owner);
10299 struct plt_entry **local_plt = (struct plt_entry **)
10300 elf_local_got_ents (input_sec->owner) + symtab_hdr->sh_info;
10301 unsigned long r_symndx = ELF64_R_SYM (rel->r_info);
10302
10303 if (local_plt[r_symndx] != NULL)
10304 {
10305 struct plt_entry *ent;
10306
10307 for (ent = local_plt[r_symndx]; ent != NULL; ent = ent->next)
10308 if (ent->addend == rel->r_addend
10309 && ent->plt.offset != (bfd_vma) -1)
10310 {
10311 *plt_ent = ent;
10312 return ppc_stub_plt_call;
10313 }
10314 }
10315 }
10316
10317 /* Determine where the call point is. */
10318 location = (input_sec->output_offset
10319 + input_sec->output_section->vma
10320 + rel->r_offset);
10321
10322 branch_offset = destination - location;
10323 r_type = ELF64_R_TYPE (rel->r_info);
10324
10325 /* Determine if a long branch stub is needed. */
10326 max_branch_offset = 1 << 25;
10327 if (r_type != R_PPC64_REL24)
10328 max_branch_offset = 1 << 15;
10329
10330 if (branch_offset + max_branch_offset >= 2 * max_branch_offset - local_off)
10331 /* We need a stub. Figure out whether a long_branch or plt_branch
10332 is needed later. */
10333 return ppc_stub_long_branch;
10334
10335 return ppc_stub_none;
10336 }
10337
10338 /* With power7 weakly ordered memory model, it is possible for ld.so
10339 to update a plt entry in one thread and have another thread see a
10340 stale zero toc entry. To avoid this we need some sort of acquire
10341 barrier in the call stub. One solution is to make the load of the
10342 toc word seem to appear to depend on the load of the function entry
10343 word. Another solution is to test for r2 being zero, and branch to
10344 the appropriate glink entry if so.
10345
10346 . fake dep barrier compare
10347 . ld 12,xxx(2) ld 12,xxx(2)
10348 . mtctr 12 mtctr 12
10349 . xor 11,12,12 ld 2,xxx+8(2)
10350 . add 2,2,11 cmpldi 2,0
10351 . ld 2,xxx+8(2) bnectr+
10352 . bctr b <glink_entry>
10353
10354 The solution involving the compare turns out to be faster, so
10355 that's what we use unless the branch won't reach. */
10356
10357 #define ALWAYS_USE_FAKE_DEP 0
10358 #define ALWAYS_EMIT_R2SAVE 0
10359
10360 #define PPC_LO(v) ((v) & 0xffff)
10361 #define PPC_HI(v) (((v) >> 16) & 0xffff)
10362 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
10363
10364 static inline unsigned int
10365 plt_stub_size (struct ppc_link_hash_table *htab,
10366 struct ppc_stub_hash_entry *stub_entry,
10367 bfd_vma off)
10368 {
10369 unsigned size = 12;
10370
10371 if (ALWAYS_EMIT_R2SAVE
10372 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10373 size += 4;
10374 if (PPC_HA (off) != 0)
10375 size += 4;
10376 if (htab->opd_abi)
10377 {
10378 size += 4;
10379 if (htab->params->plt_static_chain)
10380 size += 4;
10381 if (htab->params->plt_thread_safe
10382 && htab->elf.dynamic_sections_created
10383 && stub_entry->h != NULL
10384 && stub_entry->h->elf.dynindx != -1)
10385 size += 8;
10386 if (PPC_HA (off + 8 + 8 * htab->params->plt_static_chain) != PPC_HA (off))
10387 size += 4;
10388 }
10389 if (stub_entry->h != NULL
10390 && (stub_entry->h == htab->tls_get_addr_fd
10391 || stub_entry->h == htab->tls_get_addr)
10392 && htab->params->tls_get_addr_opt)
10393 size += 13 * 4;
10394 return size;
10395 }
10396
10397 /* If this stub would cross fewer 2**plt_stub_align boundaries if we align,
10398 then return the padding needed to do so. */
10399 static inline unsigned int
10400 plt_stub_pad (struct ppc_link_hash_table *htab,
10401 struct ppc_stub_hash_entry *stub_entry,
10402 bfd_vma plt_off)
10403 {
10404 int stub_align = 1 << htab->params->plt_stub_align;
10405 unsigned stub_size = plt_stub_size (htab, stub_entry, plt_off);
10406 bfd_vma stub_off = stub_entry->group->stub_sec->size;
10407
10408 if (((stub_off + stub_size - 1) & -stub_align) - (stub_off & -stub_align)
10409 > ((stub_size - 1) & -stub_align))
10410 return stub_align - (stub_off & (stub_align - 1));
10411 return 0;
10412 }
10413
10414 /* Build a .plt call stub. */
10415
10416 static inline bfd_byte *
10417 build_plt_stub (struct ppc_link_hash_table *htab,
10418 struct ppc_stub_hash_entry *stub_entry,
10419 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
10420 {
10421 bfd *obfd = htab->params->stub_bfd;
10422 bfd_boolean plt_load_toc = htab->opd_abi;
10423 bfd_boolean plt_static_chain = htab->params->plt_static_chain;
10424 bfd_boolean plt_thread_safe = (htab->params->plt_thread_safe
10425 && htab->elf.dynamic_sections_created
10426 && stub_entry->h != NULL
10427 && stub_entry->h->elf.dynindx != -1);
10428 bfd_boolean use_fake_dep = plt_thread_safe;
10429 bfd_vma cmp_branch_off = 0;
10430
10431 if (!ALWAYS_USE_FAKE_DEP
10432 && plt_load_toc
10433 && plt_thread_safe
10434 && !((stub_entry->h == htab->tls_get_addr_fd
10435 || stub_entry->h == htab->tls_get_addr)
10436 && htab->params->tls_get_addr_opt))
10437 {
10438 bfd_vma pltoff = stub_entry->plt_ent->plt.offset & ~1;
10439 bfd_vma pltindex = ((pltoff - PLT_INITIAL_ENTRY_SIZE (htab))
10440 / PLT_ENTRY_SIZE (htab));
10441 bfd_vma glinkoff = GLINK_CALL_STUB_SIZE + pltindex * 8;
10442 bfd_vma to, from;
10443
10444 if (pltindex > 32768)
10445 glinkoff += (pltindex - 32768) * 4;
10446 to = (glinkoff
10447 + htab->glink->output_offset
10448 + htab->glink->output_section->vma);
10449 from = (p - stub_entry->group->stub_sec->contents
10450 + 4 * (ALWAYS_EMIT_R2SAVE
10451 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10452 + 4 * (PPC_HA (offset) != 0)
10453 + 4 * (PPC_HA (offset + 8 + 8 * plt_static_chain)
10454 != PPC_HA (offset))
10455 + 4 * (plt_static_chain != 0)
10456 + 20
10457 + stub_entry->group->stub_sec->output_offset
10458 + stub_entry->group->stub_sec->output_section->vma);
10459 cmp_branch_off = to - from;
10460 use_fake_dep = cmp_branch_off + (1 << 25) >= (1 << 26);
10461 }
10462
10463 if (PPC_HA (offset) != 0)
10464 {
10465 if (r != NULL)
10466 {
10467 if (ALWAYS_EMIT_R2SAVE
10468 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10469 r[0].r_offset += 4;
10470 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
10471 r[1].r_offset = r[0].r_offset + 4;
10472 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10473 r[1].r_addend = r[0].r_addend;
10474 if (plt_load_toc)
10475 {
10476 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10477 {
10478 r[2].r_offset = r[1].r_offset + 4;
10479 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO);
10480 r[2].r_addend = r[0].r_addend;
10481 }
10482 else
10483 {
10484 r[2].r_offset = r[1].r_offset + 8 + 8 * use_fake_dep;
10485 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10486 r[2].r_addend = r[0].r_addend + 8;
10487 if (plt_static_chain)
10488 {
10489 r[3].r_offset = r[2].r_offset + 4;
10490 r[3].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10491 r[3].r_addend = r[0].r_addend + 16;
10492 }
10493 }
10494 }
10495 }
10496 if (ALWAYS_EMIT_R2SAVE
10497 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10498 bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p), p += 4;
10499 if (plt_load_toc)
10500 {
10501 bfd_put_32 (obfd, ADDIS_R11_R2 | PPC_HA (offset), p), p += 4;
10502 bfd_put_32 (obfd, LD_R12_0R11 | PPC_LO (offset), p), p += 4;
10503 }
10504 else
10505 {
10506 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
10507 bfd_put_32 (obfd, LD_R12_0R12 | PPC_LO (offset), p), p += 4;
10508 }
10509 if (plt_load_toc
10510 && PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10511 {
10512 bfd_put_32 (obfd, ADDI_R11_R11 | PPC_LO (offset), p), p += 4;
10513 offset = 0;
10514 }
10515 bfd_put_32 (obfd, MTCTR_R12, p), p += 4;
10516 if (plt_load_toc)
10517 {
10518 if (use_fake_dep)
10519 {
10520 bfd_put_32 (obfd, XOR_R2_R12_R12, p), p += 4;
10521 bfd_put_32 (obfd, ADD_R11_R11_R2, p), p += 4;
10522 }
10523 bfd_put_32 (obfd, LD_R2_0R11 | PPC_LO (offset + 8), p), p += 4;
10524 if (plt_static_chain)
10525 bfd_put_32 (obfd, LD_R11_0R11 | PPC_LO (offset + 16), p), p += 4;
10526 }
10527 }
10528 else
10529 {
10530 if (r != NULL)
10531 {
10532 if (ALWAYS_EMIT_R2SAVE
10533 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10534 r[0].r_offset += 4;
10535 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10536 if (plt_load_toc)
10537 {
10538 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10539 {
10540 r[1].r_offset = r[0].r_offset + 4;
10541 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16);
10542 r[1].r_addend = r[0].r_addend;
10543 }
10544 else
10545 {
10546 r[1].r_offset = r[0].r_offset + 8 + 8 * use_fake_dep;
10547 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10548 r[1].r_addend = r[0].r_addend + 8 + 8 * plt_static_chain;
10549 if (plt_static_chain)
10550 {
10551 r[2].r_offset = r[1].r_offset + 4;
10552 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10553 r[2].r_addend = r[0].r_addend + 8;
10554 }
10555 }
10556 }
10557 }
10558 if (ALWAYS_EMIT_R2SAVE
10559 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10560 bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p), p += 4;
10561 bfd_put_32 (obfd, LD_R12_0R2 | PPC_LO (offset), p), p += 4;
10562 if (plt_load_toc
10563 && PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10564 {
10565 bfd_put_32 (obfd, ADDI_R2_R2 | PPC_LO (offset), p), p += 4;
10566 offset = 0;
10567 }
10568 bfd_put_32 (obfd, MTCTR_R12, p), p += 4;
10569 if (plt_load_toc)
10570 {
10571 if (use_fake_dep)
10572 {
10573 bfd_put_32 (obfd, XOR_R11_R12_R12, p), p += 4;
10574 bfd_put_32 (obfd, ADD_R2_R2_R11, p), p += 4;
10575 }
10576 if (plt_static_chain)
10577 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset + 16), p), p += 4;
10578 bfd_put_32 (obfd, LD_R2_0R2 | PPC_LO (offset + 8), p), p += 4;
10579 }
10580 }
10581 if (plt_load_toc && plt_thread_safe && !use_fake_dep)
10582 {
10583 bfd_put_32 (obfd, CMPLDI_R2_0, p), p += 4;
10584 bfd_put_32 (obfd, BNECTR_P4, p), p += 4;
10585 bfd_put_32 (obfd, B_DOT | (cmp_branch_off & 0x3fffffc), p), p += 4;
10586 }
10587 else
10588 bfd_put_32 (obfd, BCTR, p), p += 4;
10589 return p;
10590 }
10591
10592 /* Build a special .plt call stub for __tls_get_addr. */
10593
10594 #define LD_R11_0R3 0xe9630000
10595 #define LD_R12_0R3 0xe9830000
10596 #define MR_R0_R3 0x7c601b78
10597 #define CMPDI_R11_0 0x2c2b0000
10598 #define ADD_R3_R12_R13 0x7c6c6a14
10599 #define BEQLR 0x4d820020
10600 #define MR_R3_R0 0x7c030378
10601 #define STD_R11_0R1 0xf9610000
10602 #define BCTRL 0x4e800421
10603 #define LD_R11_0R1 0xe9610000
10604 #define MTLR_R11 0x7d6803a6
10605
10606 static inline bfd_byte *
10607 build_tls_get_addr_stub (struct ppc_link_hash_table *htab,
10608 struct ppc_stub_hash_entry *stub_entry,
10609 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
10610 {
10611 bfd *obfd = htab->params->stub_bfd;
10612
10613 bfd_put_32 (obfd, LD_R11_0R3 + 0, p), p += 4;
10614 bfd_put_32 (obfd, LD_R12_0R3 + 8, p), p += 4;
10615 bfd_put_32 (obfd, MR_R0_R3, p), p += 4;
10616 bfd_put_32 (obfd, CMPDI_R11_0, p), p += 4;
10617 bfd_put_32 (obfd, ADD_R3_R12_R13, p), p += 4;
10618 bfd_put_32 (obfd, BEQLR, p), p += 4;
10619 bfd_put_32 (obfd, MR_R3_R0, p), p += 4;
10620 bfd_put_32 (obfd, MFLR_R11, p), p += 4;
10621 bfd_put_32 (obfd, STD_R11_0R1 + STK_LINKER (htab), p), p += 4;
10622
10623 if (r != NULL)
10624 r[0].r_offset += 9 * 4;
10625 p = build_plt_stub (htab, stub_entry, p, offset, r);
10626 bfd_put_32 (obfd, BCTRL, p - 4);
10627
10628 bfd_put_32 (obfd, LD_R2_0R1 + STK_TOC (htab), p), p += 4;
10629 bfd_put_32 (obfd, LD_R11_0R1 + STK_LINKER (htab), p), p += 4;
10630 bfd_put_32 (obfd, MTLR_R11, p), p += 4;
10631 bfd_put_32 (obfd, BLR, p), p += 4;
10632
10633 return p;
10634 }
10635
10636 static Elf_Internal_Rela *
10637 get_relocs (asection *sec, int count)
10638 {
10639 Elf_Internal_Rela *relocs;
10640 struct bfd_elf_section_data *elfsec_data;
10641
10642 elfsec_data = elf_section_data (sec);
10643 relocs = elfsec_data->relocs;
10644 if (relocs == NULL)
10645 {
10646 bfd_size_type relsize;
10647 relsize = sec->reloc_count * sizeof (*relocs);
10648 relocs = bfd_alloc (sec->owner, relsize);
10649 if (relocs == NULL)
10650 return NULL;
10651 elfsec_data->relocs = relocs;
10652 elfsec_data->rela.hdr = bfd_zalloc (sec->owner,
10653 sizeof (Elf_Internal_Shdr));
10654 if (elfsec_data->rela.hdr == NULL)
10655 return NULL;
10656 elfsec_data->rela.hdr->sh_size = (sec->reloc_count
10657 * sizeof (Elf64_External_Rela));
10658 elfsec_data->rela.hdr->sh_entsize = sizeof (Elf64_External_Rela);
10659 sec->reloc_count = 0;
10660 }
10661 relocs += sec->reloc_count;
10662 sec->reloc_count += count;
10663 return relocs;
10664 }
10665
10666 static bfd_vma
10667 get_r2off (struct bfd_link_info *info,
10668 struct ppc_stub_hash_entry *stub_entry)
10669 {
10670 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10671 bfd_vma r2off = htab->sec_info[stub_entry->target_section->id].toc_off;
10672
10673 if (r2off == 0)
10674 {
10675 /* Support linking -R objects. Get the toc pointer from the
10676 opd entry. */
10677 char buf[8];
10678 if (!htab->opd_abi)
10679 return r2off;
10680 asection *opd = stub_entry->h->elf.root.u.def.section;
10681 bfd_vma opd_off = stub_entry->h->elf.root.u.def.value;
10682
10683 if (strcmp (opd->name, ".opd") != 0
10684 || opd->reloc_count != 0)
10685 {
10686 info->callbacks->einfo (_("%P: cannot find opd entry toc for `%T'\n"),
10687 stub_entry->h->elf.root.root.string);
10688 bfd_set_error (bfd_error_bad_value);
10689 return (bfd_vma) -1;
10690 }
10691 if (!bfd_get_section_contents (opd->owner, opd, buf, opd_off + 8, 8))
10692 return (bfd_vma) -1;
10693 r2off = bfd_get_64 (opd->owner, buf);
10694 r2off -= elf_gp (info->output_bfd);
10695 }
10696 r2off -= htab->sec_info[stub_entry->group->link_sec->id].toc_off;
10697 return r2off;
10698 }
10699
10700 static bfd_boolean
10701 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
10702 {
10703 struct ppc_stub_hash_entry *stub_entry;
10704 struct ppc_branch_hash_entry *br_entry;
10705 struct bfd_link_info *info;
10706 struct ppc_link_hash_table *htab;
10707 bfd_byte *loc;
10708 bfd_byte *p;
10709 bfd_vma dest, off;
10710 int size;
10711 Elf_Internal_Rela *r;
10712 asection *plt;
10713
10714 /* Massage our args to the form they really have. */
10715 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
10716 info = in_arg;
10717
10718 htab = ppc_hash_table (info);
10719 if (htab == NULL)
10720 return FALSE;
10721
10722 /* Make a note of the offset within the stubs for this entry. */
10723 stub_entry->stub_offset = stub_entry->group->stub_sec->size;
10724 loc = stub_entry->group->stub_sec->contents + stub_entry->stub_offset;
10725
10726 htab->stub_count[stub_entry->stub_type - 1] += 1;
10727 switch (stub_entry->stub_type)
10728 {
10729 case ppc_stub_long_branch:
10730 case ppc_stub_long_branch_r2off:
10731 /* Branches are relative. This is where we are going to. */
10732 dest = (stub_entry->target_value
10733 + stub_entry->target_section->output_offset
10734 + stub_entry->target_section->output_section->vma);
10735 dest += PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
10736 off = dest;
10737
10738 /* And this is where we are coming from. */
10739 off -= (stub_entry->stub_offset
10740 + stub_entry->group->stub_sec->output_offset
10741 + stub_entry->group->stub_sec->output_section->vma);
10742
10743 size = 4;
10744 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
10745 {
10746 bfd_vma r2off = get_r2off (info, stub_entry);
10747
10748 if (r2off == (bfd_vma) -1)
10749 {
10750 htab->stub_error = TRUE;
10751 return FALSE;
10752 }
10753 bfd_put_32 (htab->params->stub_bfd, STD_R2_0R1 + STK_TOC (htab), loc);
10754 loc += 4;
10755 size = 8;
10756 if (PPC_HA (r2off) != 0)
10757 {
10758 bfd_put_32 (htab->params->stub_bfd,
10759 ADDIS_R2_R2 | PPC_HA (r2off), loc);
10760 loc += 4;
10761 size += 4;
10762 }
10763 if (PPC_LO (r2off) != 0)
10764 {
10765 bfd_put_32 (htab->params->stub_bfd,
10766 ADDI_R2_R2 | PPC_LO (r2off), loc);
10767 loc += 4;
10768 size += 4;
10769 }
10770 off -= size - 4;
10771 }
10772 bfd_put_32 (htab->params->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
10773
10774 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
10775 {
10776 info->callbacks->einfo
10777 (_("%P: long branch stub `%s' offset overflow\n"),
10778 stub_entry->root.string);
10779 htab->stub_error = TRUE;
10780 return FALSE;
10781 }
10782
10783 if (info->emitrelocations)
10784 {
10785 r = get_relocs (stub_entry->group->stub_sec, 1);
10786 if (r == NULL)
10787 return FALSE;
10788 r->r_offset = loc - stub_entry->group->stub_sec->contents;
10789 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
10790 r->r_addend = dest;
10791 if (stub_entry->h != NULL)
10792 {
10793 struct elf_link_hash_entry **hashes;
10794 unsigned long symndx;
10795 struct ppc_link_hash_entry *h;
10796
10797 hashes = elf_sym_hashes (htab->params->stub_bfd);
10798 if (hashes == NULL)
10799 {
10800 bfd_size_type hsize;
10801
10802 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
10803 hashes = bfd_zalloc (htab->params->stub_bfd, hsize);
10804 if (hashes == NULL)
10805 return FALSE;
10806 elf_sym_hashes (htab->params->stub_bfd) = hashes;
10807 htab->stub_globals = 1;
10808 }
10809 symndx = htab->stub_globals++;
10810 h = stub_entry->h;
10811 hashes[symndx] = &h->elf;
10812 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
10813 if (h->oh != NULL && h->oh->is_func)
10814 h = ppc_follow_link (h->oh);
10815 if (h->elf.root.u.def.section != stub_entry->target_section)
10816 /* H is an opd symbol. The addend must be zero. */
10817 r->r_addend = 0;
10818 else
10819 {
10820 off = (h->elf.root.u.def.value
10821 + h->elf.root.u.def.section->output_offset
10822 + h->elf.root.u.def.section->output_section->vma);
10823 r->r_addend -= off;
10824 }
10825 }
10826 }
10827 break;
10828
10829 case ppc_stub_plt_branch:
10830 case ppc_stub_plt_branch_r2off:
10831 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
10832 stub_entry->root.string + 9,
10833 FALSE, FALSE);
10834 if (br_entry == NULL)
10835 {
10836 info->callbacks->einfo (_("%P: can't find branch stub `%s'\n"),
10837 stub_entry->root.string);
10838 htab->stub_error = TRUE;
10839 return FALSE;
10840 }
10841
10842 dest = (stub_entry->target_value
10843 + stub_entry->target_section->output_offset
10844 + stub_entry->target_section->output_section->vma);
10845 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
10846 dest += PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
10847
10848 bfd_put_64 (htab->brlt->owner, dest,
10849 htab->brlt->contents + br_entry->offset);
10850
10851 if (br_entry->iter == htab->stub_iteration)
10852 {
10853 br_entry->iter = 0;
10854
10855 if (htab->relbrlt != NULL)
10856 {
10857 /* Create a reloc for the branch lookup table entry. */
10858 Elf_Internal_Rela rela;
10859 bfd_byte *rl;
10860
10861 rela.r_offset = (br_entry->offset
10862 + htab->brlt->output_offset
10863 + htab->brlt->output_section->vma);
10864 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
10865 rela.r_addend = dest;
10866
10867 rl = htab->relbrlt->contents;
10868 rl += (htab->relbrlt->reloc_count++
10869 * sizeof (Elf64_External_Rela));
10870 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
10871 }
10872 else if (info->emitrelocations)
10873 {
10874 r = get_relocs (htab->brlt, 1);
10875 if (r == NULL)
10876 return FALSE;
10877 /* brlt, being SEC_LINKER_CREATED does not go through the
10878 normal reloc processing. Symbols and offsets are not
10879 translated from input file to output file form, so
10880 set up the offset per the output file. */
10881 r->r_offset = (br_entry->offset
10882 + htab->brlt->output_offset
10883 + htab->brlt->output_section->vma);
10884 r->r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
10885 r->r_addend = dest;
10886 }
10887 }
10888
10889 dest = (br_entry->offset
10890 + htab->brlt->output_offset
10891 + htab->brlt->output_section->vma);
10892
10893 off = (dest
10894 - elf_gp (htab->brlt->output_section->owner)
10895 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
10896
10897 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
10898 {
10899 info->callbacks->einfo
10900 (_("%P: linkage table error against `%T'\n"),
10901 stub_entry->root.string);
10902 bfd_set_error (bfd_error_bad_value);
10903 htab->stub_error = TRUE;
10904 return FALSE;
10905 }
10906
10907 if (info->emitrelocations)
10908 {
10909 r = get_relocs (stub_entry->group->stub_sec, 1 + (PPC_HA (off) != 0));
10910 if (r == NULL)
10911 return FALSE;
10912 r[0].r_offset = loc - stub_entry->group->stub_sec->contents;
10913 if (bfd_big_endian (info->output_bfd))
10914 r[0].r_offset += 2;
10915 if (stub_entry->stub_type == ppc_stub_plt_branch_r2off)
10916 r[0].r_offset += 4;
10917 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10918 r[0].r_addend = dest;
10919 if (PPC_HA (off) != 0)
10920 {
10921 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
10922 r[1].r_offset = r[0].r_offset + 4;
10923 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10924 r[1].r_addend = r[0].r_addend;
10925 }
10926 }
10927
10928 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
10929 {
10930 if (PPC_HA (off) != 0)
10931 {
10932 size = 16;
10933 bfd_put_32 (htab->params->stub_bfd,
10934 ADDIS_R12_R2 | PPC_HA (off), loc);
10935 loc += 4;
10936 bfd_put_32 (htab->params->stub_bfd,
10937 LD_R12_0R12 | PPC_LO (off), loc);
10938 }
10939 else
10940 {
10941 size = 12;
10942 bfd_put_32 (htab->params->stub_bfd,
10943 LD_R12_0R2 | PPC_LO (off), loc);
10944 }
10945 }
10946 else
10947 {
10948 bfd_vma r2off = get_r2off (info, stub_entry);
10949
10950 if (r2off == (bfd_vma) -1)
10951 {
10952 htab->stub_error = TRUE;
10953 return FALSE;
10954 }
10955
10956 bfd_put_32 (htab->params->stub_bfd, STD_R2_0R1 + STK_TOC (htab), loc);
10957 loc += 4;
10958 size = 16;
10959 if (PPC_HA (off) != 0)
10960 {
10961 size += 4;
10962 bfd_put_32 (htab->params->stub_bfd,
10963 ADDIS_R12_R2 | PPC_HA (off), loc);
10964 loc += 4;
10965 bfd_put_32 (htab->params->stub_bfd,
10966 LD_R12_0R12 | PPC_LO (off), loc);
10967 }
10968 else
10969 bfd_put_32 (htab->params->stub_bfd, LD_R12_0R2 | PPC_LO (off), loc);
10970
10971 if (PPC_HA (r2off) != 0)
10972 {
10973 size += 4;
10974 loc += 4;
10975 bfd_put_32 (htab->params->stub_bfd,
10976 ADDIS_R2_R2 | PPC_HA (r2off), loc);
10977 }
10978 if (PPC_LO (r2off) != 0)
10979 {
10980 size += 4;
10981 loc += 4;
10982 bfd_put_32 (htab->params->stub_bfd,
10983 ADDI_R2_R2 | PPC_LO (r2off), loc);
10984 }
10985 }
10986 loc += 4;
10987 bfd_put_32 (htab->params->stub_bfd, MTCTR_R12, loc);
10988 loc += 4;
10989 bfd_put_32 (htab->params->stub_bfd, BCTR, loc);
10990 break;
10991
10992 case ppc_stub_plt_call:
10993 case ppc_stub_plt_call_r2save:
10994 if (stub_entry->h != NULL
10995 && stub_entry->h->is_func_descriptor
10996 && stub_entry->h->oh != NULL)
10997 {
10998 struct ppc_link_hash_entry *fh = ppc_follow_link (stub_entry->h->oh);
10999
11000 /* If the old-ABI "dot-symbol" is undefined make it weak so
11001 we don't get a link error from RELOC_FOR_GLOBAL_SYMBOL. */
11002 if (fh->elf.root.type == bfd_link_hash_undefined)
11003 fh->elf.root.type = bfd_link_hash_undefweak;
11004 /* Stop undo_symbol_twiddle changing it back to undefined. */
11005 fh->was_undefined = 0;
11006 }
11007
11008 /* Now build the stub. */
11009 dest = stub_entry->plt_ent->plt.offset & ~1;
11010 if (dest >= (bfd_vma) -2)
11011 abort ();
11012
11013 plt = htab->elf.splt;
11014 if (!htab->elf.dynamic_sections_created
11015 || stub_entry->h == NULL
11016 || stub_entry->h->elf.dynindx == -1)
11017 plt = htab->elf.iplt;
11018
11019 dest += plt->output_offset + plt->output_section->vma;
11020
11021 if (stub_entry->h == NULL
11022 && (stub_entry->plt_ent->plt.offset & 1) == 0)
11023 {
11024 Elf_Internal_Rela rela;
11025 bfd_byte *rl;
11026
11027 rela.r_offset = dest;
11028 if (htab->opd_abi)
11029 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
11030 else
11031 rela.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
11032 rela.r_addend = (stub_entry->target_value
11033 + stub_entry->target_section->output_offset
11034 + stub_entry->target_section->output_section->vma);
11035
11036 rl = (htab->elf.irelplt->contents
11037 + (htab->elf.irelplt->reloc_count++
11038 * sizeof (Elf64_External_Rela)));
11039 bfd_elf64_swap_reloca_out (info->output_bfd, &rela, rl);
11040 stub_entry->plt_ent->plt.offset |= 1;
11041 }
11042
11043 off = (dest
11044 - elf_gp (plt->output_section->owner)
11045 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11046
11047 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
11048 {
11049 info->callbacks->einfo
11050 (_("%P: linkage table error against `%T'\n"),
11051 stub_entry->h != NULL
11052 ? stub_entry->h->elf.root.root.string
11053 : "<local sym>");
11054 bfd_set_error (bfd_error_bad_value);
11055 htab->stub_error = TRUE;
11056 return FALSE;
11057 }
11058
11059 if (htab->params->plt_stub_align != 0)
11060 {
11061 unsigned pad = plt_stub_pad (htab, stub_entry, off);
11062
11063 stub_entry->group->stub_sec->size += pad;
11064 stub_entry->stub_offset = stub_entry->group->stub_sec->size;
11065 loc += pad;
11066 }
11067
11068 r = NULL;
11069 if (info->emitrelocations)
11070 {
11071 r = get_relocs (stub_entry->group->stub_sec,
11072 ((PPC_HA (off) != 0)
11073 + (htab->opd_abi
11074 ? 2 + (htab->params->plt_static_chain
11075 && PPC_HA (off + 16) == PPC_HA (off))
11076 : 1)));
11077 if (r == NULL)
11078 return FALSE;
11079 r[0].r_offset = loc - stub_entry->group->stub_sec->contents;
11080 if (bfd_big_endian (info->output_bfd))
11081 r[0].r_offset += 2;
11082 r[0].r_addend = dest;
11083 }
11084 if (stub_entry->h != NULL
11085 && (stub_entry->h == htab->tls_get_addr_fd
11086 || stub_entry->h == htab->tls_get_addr)
11087 && htab->params->tls_get_addr_opt)
11088 p = build_tls_get_addr_stub (htab, stub_entry, loc, off, r);
11089 else
11090 p = build_plt_stub (htab, stub_entry, loc, off, r);
11091 size = p - loc;
11092 break;
11093
11094 case ppc_stub_save_res:
11095 return TRUE;
11096
11097 default:
11098 BFD_FAIL ();
11099 return FALSE;
11100 }
11101
11102 stub_entry->group->stub_sec->size += size;
11103
11104 if (htab->params->emit_stub_syms)
11105 {
11106 struct elf_link_hash_entry *h;
11107 size_t len1, len2;
11108 char *name;
11109 const char *const stub_str[] = { "long_branch",
11110 "long_branch_r2off",
11111 "plt_branch",
11112 "plt_branch_r2off",
11113 "plt_call",
11114 "plt_call" };
11115
11116 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
11117 len2 = strlen (stub_entry->root.string);
11118 name = bfd_malloc (len1 + len2 + 2);
11119 if (name == NULL)
11120 return FALSE;
11121 memcpy (name, stub_entry->root.string, 9);
11122 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
11123 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
11124 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
11125 if (h == NULL)
11126 return FALSE;
11127 if (h->root.type == bfd_link_hash_new)
11128 {
11129 h->root.type = bfd_link_hash_defined;
11130 h->root.u.def.section = stub_entry->group->stub_sec;
11131 h->root.u.def.value = stub_entry->stub_offset;
11132 h->ref_regular = 1;
11133 h->def_regular = 1;
11134 h->ref_regular_nonweak = 1;
11135 h->forced_local = 1;
11136 h->non_elf = 0;
11137 h->root.linker_def = 1;
11138 }
11139 }
11140
11141 return TRUE;
11142 }
11143
11144 /* As above, but don't actually build the stub. Just bump offset so
11145 we know stub section sizes, and select plt_branch stubs where
11146 long_branch stubs won't do. */
11147
11148 static bfd_boolean
11149 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
11150 {
11151 struct ppc_stub_hash_entry *stub_entry;
11152 struct bfd_link_info *info;
11153 struct ppc_link_hash_table *htab;
11154 bfd_vma off;
11155 int size;
11156
11157 /* Massage our args to the form they really have. */
11158 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
11159 info = in_arg;
11160
11161 htab = ppc_hash_table (info);
11162 if (htab == NULL)
11163 return FALSE;
11164
11165 if (stub_entry->h != NULL
11166 && stub_entry->h->save_res
11167 && stub_entry->h->elf.root.type == bfd_link_hash_defined
11168 && stub_entry->h->elf.root.u.def.section == htab->sfpr)
11169 {
11170 /* Don't make stubs to out-of-line register save/restore
11171 functions. Instead, emit copies of the functions. */
11172 stub_entry->group->needs_save_res = 1;
11173 stub_entry->stub_type = ppc_stub_save_res;
11174 return TRUE;
11175 }
11176
11177 if (stub_entry->stub_type == ppc_stub_plt_call
11178 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
11179 {
11180 asection *plt;
11181 off = stub_entry->plt_ent->plt.offset & ~(bfd_vma) 1;
11182 if (off >= (bfd_vma) -2)
11183 abort ();
11184 plt = htab->elf.splt;
11185 if (!htab->elf.dynamic_sections_created
11186 || stub_entry->h == NULL
11187 || stub_entry->h->elf.dynindx == -1)
11188 plt = htab->elf.iplt;
11189 off += (plt->output_offset
11190 + plt->output_section->vma
11191 - elf_gp (plt->output_section->owner)
11192 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11193
11194 size = plt_stub_size (htab, stub_entry, off);
11195 if (htab->params->plt_stub_align)
11196 size += plt_stub_pad (htab, stub_entry, off);
11197 if (info->emitrelocations)
11198 {
11199 stub_entry->group->stub_sec->reloc_count
11200 += ((PPC_HA (off) != 0)
11201 + (htab->opd_abi
11202 ? 2 + (htab->params->plt_static_chain
11203 && PPC_HA (off + 16) == PPC_HA (off))
11204 : 1));
11205 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11206 }
11207 }
11208 else
11209 {
11210 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
11211 variants. */
11212 bfd_vma r2off = 0;
11213 bfd_vma local_off = 0;
11214
11215 off = (stub_entry->target_value
11216 + stub_entry->target_section->output_offset
11217 + stub_entry->target_section->output_section->vma);
11218 off -= (stub_entry->group->stub_sec->size
11219 + stub_entry->group->stub_sec->output_offset
11220 + stub_entry->group->stub_sec->output_section->vma);
11221
11222 /* Reset the stub type from the plt variant in case we now
11223 can reach with a shorter stub. */
11224 if (stub_entry->stub_type >= ppc_stub_plt_branch)
11225 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
11226
11227 size = 4;
11228 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
11229 {
11230 r2off = get_r2off (info, stub_entry);
11231 if (r2off == (bfd_vma) -1)
11232 {
11233 htab->stub_error = TRUE;
11234 return FALSE;
11235 }
11236 size = 8;
11237 if (PPC_HA (r2off) != 0)
11238 size += 4;
11239 if (PPC_LO (r2off) != 0)
11240 size += 4;
11241 off -= size - 4;
11242 }
11243
11244 local_off = PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
11245
11246 /* If the branch offset if too big, use a ppc_stub_plt_branch.
11247 Do the same for -R objects without function descriptors. */
11248 if (off + (1 << 25) >= (bfd_vma) (1 << 26) - local_off
11249 || (stub_entry->stub_type == ppc_stub_long_branch_r2off
11250 && r2off == 0
11251 && htab->sec_info[stub_entry->target_section->id].toc_off == 0))
11252 {
11253 struct ppc_branch_hash_entry *br_entry;
11254
11255 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
11256 stub_entry->root.string + 9,
11257 TRUE, FALSE);
11258 if (br_entry == NULL)
11259 {
11260 info->callbacks->einfo (_("%P: can't build branch stub `%s'\n"),
11261 stub_entry->root.string);
11262 htab->stub_error = TRUE;
11263 return FALSE;
11264 }
11265
11266 if (br_entry->iter != htab->stub_iteration)
11267 {
11268 br_entry->iter = htab->stub_iteration;
11269 br_entry->offset = htab->brlt->size;
11270 htab->brlt->size += 8;
11271
11272 if (htab->relbrlt != NULL)
11273 htab->relbrlt->size += sizeof (Elf64_External_Rela);
11274 else if (info->emitrelocations)
11275 {
11276 htab->brlt->reloc_count += 1;
11277 htab->brlt->flags |= SEC_RELOC;
11278 }
11279 }
11280
11281 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
11282 off = (br_entry->offset
11283 + htab->brlt->output_offset
11284 + htab->brlt->output_section->vma
11285 - elf_gp (htab->brlt->output_section->owner)
11286 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11287
11288 if (info->emitrelocations)
11289 {
11290 stub_entry->group->stub_sec->reloc_count
11291 += 1 + (PPC_HA (off) != 0);
11292 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11293 }
11294
11295 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
11296 {
11297 size = 12;
11298 if (PPC_HA (off) != 0)
11299 size = 16;
11300 }
11301 else
11302 {
11303 size = 16;
11304 if (PPC_HA (off) != 0)
11305 size += 4;
11306
11307 if (PPC_HA (r2off) != 0)
11308 size += 4;
11309 if (PPC_LO (r2off) != 0)
11310 size += 4;
11311 }
11312 }
11313 else if (info->emitrelocations)
11314 {
11315 stub_entry->group->stub_sec->reloc_count += 1;
11316 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11317 }
11318 }
11319
11320 stub_entry->group->stub_sec->size += size;
11321 return TRUE;
11322 }
11323
11324 /* Set up various things so that we can make a list of input sections
11325 for each output section included in the link. Returns -1 on error,
11326 0 when no stubs will be needed, and 1 on success. */
11327
11328 int
11329 ppc64_elf_setup_section_lists (struct bfd_link_info *info)
11330 {
11331 unsigned int id;
11332 bfd_size_type amt;
11333 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11334
11335 if (htab == NULL)
11336 return -1;
11337
11338 htab->sec_info_arr_size = bfd_get_next_section_id ();
11339 amt = sizeof (*htab->sec_info) * (htab->sec_info_arr_size);
11340 htab->sec_info = bfd_zmalloc (amt);
11341 if (htab->sec_info == NULL)
11342 return -1;
11343
11344 /* Set toc_off for com, und, abs and ind sections. */
11345 for (id = 0; id < 3; id++)
11346 htab->sec_info[id].toc_off = TOC_BASE_OFF;
11347
11348 return 1;
11349 }
11350
11351 /* Set up for first pass at multitoc partitioning. */
11352
11353 void
11354 ppc64_elf_start_multitoc_partition (struct bfd_link_info *info)
11355 {
11356 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11357
11358 htab->toc_curr = ppc64_elf_set_toc (info, info->output_bfd);
11359 htab->toc_bfd = NULL;
11360 htab->toc_first_sec = NULL;
11361 }
11362
11363 /* The linker repeatedly calls this function for each TOC input section
11364 and linker generated GOT section. Group input bfds such that the toc
11365 within a group is less than 64k in size. */
11366
11367 bfd_boolean
11368 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
11369 {
11370 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11371 bfd_vma addr, off, limit;
11372
11373 if (htab == NULL)
11374 return FALSE;
11375
11376 if (!htab->second_toc_pass)
11377 {
11378 /* Keep track of the first .toc or .got section for this input bfd. */
11379 bfd_boolean new_bfd = htab->toc_bfd != isec->owner;
11380
11381 if (new_bfd)
11382 {
11383 htab->toc_bfd = isec->owner;
11384 htab->toc_first_sec = isec;
11385 }
11386
11387 addr = isec->output_offset + isec->output_section->vma;
11388 off = addr - htab->toc_curr;
11389 limit = 0x80008000;
11390 if (ppc64_elf_tdata (isec->owner)->has_small_toc_reloc)
11391 limit = 0x10000;
11392 if (off + isec->size > limit)
11393 {
11394 addr = (htab->toc_first_sec->output_offset
11395 + htab->toc_first_sec->output_section->vma);
11396 htab->toc_curr = addr;
11397 htab->toc_curr &= -TOC_BASE_ALIGN;
11398 }
11399
11400 /* toc_curr is the base address of this toc group. Set elf_gp
11401 for the input section to be the offset relative to the
11402 output toc base plus 0x8000. Making the input elf_gp an
11403 offset allows us to move the toc as a whole without
11404 recalculating input elf_gp. */
11405 off = htab->toc_curr - elf_gp (isec->output_section->owner);
11406 off += TOC_BASE_OFF;
11407
11408 /* Die if someone uses a linker script that doesn't keep input
11409 file .toc and .got together. */
11410 if (new_bfd
11411 && elf_gp (isec->owner) != 0
11412 && elf_gp (isec->owner) != off)
11413 return FALSE;
11414
11415 elf_gp (isec->owner) = off;
11416 return TRUE;
11417 }
11418
11419 /* During the second pass toc_first_sec points to the start of
11420 a toc group, and toc_curr is used to track the old elf_gp.
11421 We use toc_bfd to ensure we only look at each bfd once. */
11422 if (htab->toc_bfd == isec->owner)
11423 return TRUE;
11424 htab->toc_bfd = isec->owner;
11425
11426 if (htab->toc_first_sec == NULL
11427 || htab->toc_curr != elf_gp (isec->owner))
11428 {
11429 htab->toc_curr = elf_gp (isec->owner);
11430 htab->toc_first_sec = isec;
11431 }
11432 addr = (htab->toc_first_sec->output_offset
11433 + htab->toc_first_sec->output_section->vma);
11434 off = addr - elf_gp (isec->output_section->owner) + TOC_BASE_OFF;
11435 elf_gp (isec->owner) = off;
11436
11437 return TRUE;
11438 }
11439
11440 /* Called via elf_link_hash_traverse to merge GOT entries for global
11441 symbol H. */
11442
11443 static bfd_boolean
11444 merge_global_got (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
11445 {
11446 if (h->root.type == bfd_link_hash_indirect)
11447 return TRUE;
11448
11449 merge_got_entries (&h->got.glist);
11450
11451 return TRUE;
11452 }
11453
11454 /* Called via elf_link_hash_traverse to allocate GOT entries for global
11455 symbol H. */
11456
11457 static bfd_boolean
11458 reallocate_got (struct elf_link_hash_entry *h, void *inf)
11459 {
11460 struct got_entry *gent;
11461
11462 if (h->root.type == bfd_link_hash_indirect)
11463 return TRUE;
11464
11465 for (gent = h->got.glist; gent != NULL; gent = gent->next)
11466 if (!gent->is_indirect)
11467 allocate_got (h, (struct bfd_link_info *) inf, gent);
11468 return TRUE;
11469 }
11470
11471 /* Called on the first multitoc pass after the last call to
11472 ppc64_elf_next_toc_section. This function removes duplicate GOT
11473 entries. */
11474
11475 bfd_boolean
11476 ppc64_elf_layout_multitoc (struct bfd_link_info *info)
11477 {
11478 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11479 struct bfd *ibfd, *ibfd2;
11480 bfd_boolean done_something;
11481
11482 htab->multi_toc_needed = htab->toc_curr != elf_gp (info->output_bfd);
11483
11484 if (!htab->do_multi_toc)
11485 return FALSE;
11486
11487 /* Merge global sym got entries within a toc group. */
11488 elf_link_hash_traverse (&htab->elf, merge_global_got, info);
11489
11490 /* And tlsld_got. */
11491 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11492 {
11493 struct got_entry *ent, *ent2;
11494
11495 if (!is_ppc64_elf (ibfd))
11496 continue;
11497
11498 ent = ppc64_tlsld_got (ibfd);
11499 if (!ent->is_indirect
11500 && ent->got.offset != (bfd_vma) -1)
11501 {
11502 for (ibfd2 = ibfd->link.next; ibfd2 != NULL; ibfd2 = ibfd2->link.next)
11503 {
11504 if (!is_ppc64_elf (ibfd2))
11505 continue;
11506
11507 ent2 = ppc64_tlsld_got (ibfd2);
11508 if (!ent2->is_indirect
11509 && ent2->got.offset != (bfd_vma) -1
11510 && elf_gp (ibfd2) == elf_gp (ibfd))
11511 {
11512 ent2->is_indirect = TRUE;
11513 ent2->got.ent = ent;
11514 }
11515 }
11516 }
11517 }
11518
11519 /* Zap sizes of got sections. */
11520 htab->elf.irelplt->rawsize = htab->elf.irelplt->size;
11521 htab->elf.irelplt->size -= htab->got_reli_size;
11522 htab->got_reli_size = 0;
11523
11524 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11525 {
11526 asection *got, *relgot;
11527
11528 if (!is_ppc64_elf (ibfd))
11529 continue;
11530
11531 got = ppc64_elf_tdata (ibfd)->got;
11532 if (got != NULL)
11533 {
11534 got->rawsize = got->size;
11535 got->size = 0;
11536 relgot = ppc64_elf_tdata (ibfd)->relgot;
11537 relgot->rawsize = relgot->size;
11538 relgot->size = 0;
11539 }
11540 }
11541
11542 /* Now reallocate the got, local syms first. We don't need to
11543 allocate section contents again since we never increase size. */
11544 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11545 {
11546 struct got_entry **lgot_ents;
11547 struct got_entry **end_lgot_ents;
11548 struct plt_entry **local_plt;
11549 struct plt_entry **end_local_plt;
11550 unsigned char *lgot_masks;
11551 bfd_size_type locsymcount;
11552 Elf_Internal_Shdr *symtab_hdr;
11553 asection *s;
11554
11555 if (!is_ppc64_elf (ibfd))
11556 continue;
11557
11558 lgot_ents = elf_local_got_ents (ibfd);
11559 if (!lgot_ents)
11560 continue;
11561
11562 symtab_hdr = &elf_symtab_hdr (ibfd);
11563 locsymcount = symtab_hdr->sh_info;
11564 end_lgot_ents = lgot_ents + locsymcount;
11565 local_plt = (struct plt_entry **) end_lgot_ents;
11566 end_local_plt = local_plt + locsymcount;
11567 lgot_masks = (unsigned char *) end_local_plt;
11568 s = ppc64_elf_tdata (ibfd)->got;
11569 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
11570 {
11571 struct got_entry *ent;
11572
11573 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
11574 {
11575 unsigned int ent_size = 8;
11576 unsigned int rel_size = sizeof (Elf64_External_Rela);
11577
11578 ent->got.offset = s->size;
11579 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
11580 {
11581 ent_size *= 2;
11582 rel_size *= 2;
11583 }
11584 s->size += ent_size;
11585 if ((*lgot_masks & PLT_IFUNC) != 0)
11586 {
11587 htab->elf.irelplt->size += rel_size;
11588 htab->got_reli_size += rel_size;
11589 }
11590 else if (bfd_link_pic (info))
11591 {
11592 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
11593 srel->size += rel_size;
11594 }
11595 }
11596 }
11597 }
11598
11599 elf_link_hash_traverse (&htab->elf, reallocate_got, info);
11600
11601 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11602 {
11603 struct got_entry *ent;
11604
11605 if (!is_ppc64_elf (ibfd))
11606 continue;
11607
11608 ent = ppc64_tlsld_got (ibfd);
11609 if (!ent->is_indirect
11610 && ent->got.offset != (bfd_vma) -1)
11611 {
11612 asection *s = ppc64_elf_tdata (ibfd)->got;
11613 ent->got.offset = s->size;
11614 s->size += 16;
11615 if (bfd_link_pic (info))
11616 {
11617 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
11618 srel->size += sizeof (Elf64_External_Rela);
11619 }
11620 }
11621 }
11622
11623 done_something = htab->elf.irelplt->rawsize != htab->elf.irelplt->size;
11624 if (!done_something)
11625 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11626 {
11627 asection *got;
11628
11629 if (!is_ppc64_elf (ibfd))
11630 continue;
11631
11632 got = ppc64_elf_tdata (ibfd)->got;
11633 if (got != NULL)
11634 {
11635 done_something = got->rawsize != got->size;
11636 if (done_something)
11637 break;
11638 }
11639 }
11640
11641 if (done_something)
11642 (*htab->params->layout_sections_again) ();
11643
11644 /* Set up for second pass over toc sections to recalculate elf_gp
11645 on input sections. */
11646 htab->toc_bfd = NULL;
11647 htab->toc_first_sec = NULL;
11648 htab->second_toc_pass = TRUE;
11649 return done_something;
11650 }
11651
11652 /* Called after second pass of multitoc partitioning. */
11653
11654 void
11655 ppc64_elf_finish_multitoc_partition (struct bfd_link_info *info)
11656 {
11657 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11658
11659 /* After the second pass, toc_curr tracks the TOC offset used
11660 for code sections below in ppc64_elf_next_input_section. */
11661 htab->toc_curr = TOC_BASE_OFF;
11662 }
11663
11664 /* No toc references were found in ISEC. If the code in ISEC makes no
11665 calls, then there's no need to use toc adjusting stubs when branching
11666 into ISEC. Actually, indirect calls from ISEC are OK as they will
11667 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
11668 needed, and 2 if a cyclical call-graph was found but no other reason
11669 for a stub was detected. If called from the top level, a return of
11670 2 means the same as a return of 0. */
11671
11672 static int
11673 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
11674 {
11675 int ret;
11676
11677 /* Mark this section as checked. */
11678 isec->call_check_done = 1;
11679
11680 /* We know none of our code bearing sections will need toc stubs. */
11681 if ((isec->flags & SEC_LINKER_CREATED) != 0)
11682 return 0;
11683
11684 if (isec->size == 0)
11685 return 0;
11686
11687 if (isec->output_section == NULL)
11688 return 0;
11689
11690 ret = 0;
11691 if (isec->reloc_count != 0)
11692 {
11693 Elf_Internal_Rela *relstart, *rel;
11694 Elf_Internal_Sym *local_syms;
11695 struct ppc_link_hash_table *htab;
11696
11697 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
11698 info->keep_memory);
11699 if (relstart == NULL)
11700 return -1;
11701
11702 /* Look for branches to outside of this section. */
11703 local_syms = NULL;
11704 htab = ppc_hash_table (info);
11705 if (htab == NULL)
11706 return -1;
11707
11708 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
11709 {
11710 enum elf_ppc64_reloc_type r_type;
11711 unsigned long r_symndx;
11712 struct elf_link_hash_entry *h;
11713 struct ppc_link_hash_entry *eh;
11714 Elf_Internal_Sym *sym;
11715 asection *sym_sec;
11716 struct _opd_sec_data *opd;
11717 bfd_vma sym_value;
11718 bfd_vma dest;
11719
11720 r_type = ELF64_R_TYPE (rel->r_info);
11721 if (r_type != R_PPC64_REL24
11722 && r_type != R_PPC64_REL14
11723 && r_type != R_PPC64_REL14_BRTAKEN
11724 && r_type != R_PPC64_REL14_BRNTAKEN)
11725 continue;
11726
11727 r_symndx = ELF64_R_SYM (rel->r_info);
11728 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
11729 isec->owner))
11730 {
11731 ret = -1;
11732 break;
11733 }
11734
11735 /* Calls to dynamic lib functions go through a plt call stub
11736 that uses r2. */
11737 eh = (struct ppc_link_hash_entry *) h;
11738 if (eh != NULL
11739 && (eh->elf.plt.plist != NULL
11740 || (eh->oh != NULL
11741 && ppc_follow_link (eh->oh)->elf.plt.plist != NULL)))
11742 {
11743 ret = 1;
11744 break;
11745 }
11746
11747 if (sym_sec == NULL)
11748 /* Ignore other undefined symbols. */
11749 continue;
11750
11751 /* Assume branches to other sections not included in the
11752 link need stubs too, to cover -R and absolute syms. */
11753 if (sym_sec->output_section == NULL)
11754 {
11755 ret = 1;
11756 break;
11757 }
11758
11759 if (h == NULL)
11760 sym_value = sym->st_value;
11761 else
11762 {
11763 if (h->root.type != bfd_link_hash_defined
11764 && h->root.type != bfd_link_hash_defweak)
11765 abort ();
11766 sym_value = h->root.u.def.value;
11767 }
11768 sym_value += rel->r_addend;
11769
11770 /* If this branch reloc uses an opd sym, find the code section. */
11771 opd = get_opd_info (sym_sec);
11772 if (opd != NULL)
11773 {
11774 if (h == NULL && opd->adjust != NULL)
11775 {
11776 long adjust;
11777
11778 adjust = opd->adjust[OPD_NDX (sym_value)];
11779 if (adjust == -1)
11780 /* Assume deleted functions won't ever be called. */
11781 continue;
11782 sym_value += adjust;
11783 }
11784
11785 dest = opd_entry_value (sym_sec, sym_value,
11786 &sym_sec, NULL, FALSE);
11787 if (dest == (bfd_vma) -1)
11788 continue;
11789 }
11790 else
11791 dest = (sym_value
11792 + sym_sec->output_offset
11793 + sym_sec->output_section->vma);
11794
11795 /* Ignore branch to self. */
11796 if (sym_sec == isec)
11797 continue;
11798
11799 /* If the called function uses the toc, we need a stub. */
11800 if (sym_sec->has_toc_reloc
11801 || sym_sec->makes_toc_func_call)
11802 {
11803 ret = 1;
11804 break;
11805 }
11806
11807 /* Assume any branch that needs a long branch stub might in fact
11808 need a plt_branch stub. A plt_branch stub uses r2. */
11809 else if (dest - (isec->output_offset
11810 + isec->output_section->vma
11811 + rel->r_offset) + (1 << 25)
11812 >= (2u << 25) - PPC64_LOCAL_ENTRY_OFFSET (h
11813 ? h->other
11814 : sym->st_other))
11815 {
11816 ret = 1;
11817 break;
11818 }
11819
11820 /* If calling back to a section in the process of being
11821 tested, we can't say for sure that no toc adjusting stubs
11822 are needed, so don't return zero. */
11823 else if (sym_sec->call_check_in_progress)
11824 ret = 2;
11825
11826 /* Branches to another section that itself doesn't have any TOC
11827 references are OK. Recursively call ourselves to check. */
11828 else if (!sym_sec->call_check_done)
11829 {
11830 int recur;
11831
11832 /* Mark current section as indeterminate, so that other
11833 sections that call back to current won't be marked as
11834 known. */
11835 isec->call_check_in_progress = 1;
11836 recur = toc_adjusting_stub_needed (info, sym_sec);
11837 isec->call_check_in_progress = 0;
11838
11839 if (recur != 0)
11840 {
11841 ret = recur;
11842 if (recur != 2)
11843 break;
11844 }
11845 }
11846 }
11847
11848 if (local_syms != NULL
11849 && (elf_symtab_hdr (isec->owner).contents
11850 != (unsigned char *) local_syms))
11851 free (local_syms);
11852 if (elf_section_data (isec)->relocs != relstart)
11853 free (relstart);
11854 }
11855
11856 if ((ret & 1) == 0
11857 && isec->map_head.s != NULL
11858 && (strcmp (isec->output_section->name, ".init") == 0
11859 || strcmp (isec->output_section->name, ".fini") == 0))
11860 {
11861 if (isec->map_head.s->has_toc_reloc
11862 || isec->map_head.s->makes_toc_func_call)
11863 ret = 1;
11864 else if (!isec->map_head.s->call_check_done)
11865 {
11866 int recur;
11867 isec->call_check_in_progress = 1;
11868 recur = toc_adjusting_stub_needed (info, isec->map_head.s);
11869 isec->call_check_in_progress = 0;
11870 if (recur != 0)
11871 ret = recur;
11872 }
11873 }
11874
11875 if (ret == 1)
11876 isec->makes_toc_func_call = 1;
11877
11878 return ret;
11879 }
11880
11881 /* The linker repeatedly calls this function for each input section,
11882 in the order that input sections are linked into output sections.
11883 Build lists of input sections to determine groupings between which
11884 we may insert linker stubs. */
11885
11886 bfd_boolean
11887 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
11888 {
11889 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11890
11891 if (htab == NULL)
11892 return FALSE;
11893
11894 if ((isec->output_section->flags & SEC_CODE) != 0
11895 && isec->output_section->id < htab->sec_info_arr_size)
11896 {
11897 /* This happens to make the list in reverse order,
11898 which is what we want. */
11899 htab->sec_info[isec->id].u.list
11900 = htab->sec_info[isec->output_section->id].u.list;
11901 htab->sec_info[isec->output_section->id].u.list = isec;
11902 }
11903
11904 if (htab->multi_toc_needed)
11905 {
11906 /* Analyse sections that aren't already flagged as needing a
11907 valid toc pointer. Exclude .fixup for the linux kernel.
11908 .fixup contains branches, but only back to the function that
11909 hit an exception. */
11910 if (!(isec->has_toc_reloc
11911 || (isec->flags & SEC_CODE) == 0
11912 || strcmp (isec->name, ".fixup") == 0
11913 || isec->call_check_done))
11914 {
11915 if (toc_adjusting_stub_needed (info, isec) < 0)
11916 return FALSE;
11917 }
11918 /* Make all sections use the TOC assigned for this object file.
11919 This will be wrong for pasted sections; We fix that in
11920 check_pasted_section(). */
11921 if (elf_gp (isec->owner) != 0)
11922 htab->toc_curr = elf_gp (isec->owner);
11923 }
11924
11925 htab->sec_info[isec->id].toc_off = htab->toc_curr;
11926 return TRUE;
11927 }
11928
11929 /* Check that all .init and .fini sections use the same toc, if they
11930 have toc relocs. */
11931
11932 static bfd_boolean
11933 check_pasted_section (struct bfd_link_info *info, const char *name)
11934 {
11935 asection *o = bfd_get_section_by_name (info->output_bfd, name);
11936
11937 if (o != NULL)
11938 {
11939 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11940 bfd_vma toc_off = 0;
11941 asection *i;
11942
11943 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
11944 if (i->has_toc_reloc)
11945 {
11946 if (toc_off == 0)
11947 toc_off = htab->sec_info[i->id].toc_off;
11948 else if (toc_off != htab->sec_info[i->id].toc_off)
11949 return FALSE;
11950 }
11951
11952 if (toc_off == 0)
11953 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
11954 if (i->makes_toc_func_call)
11955 {
11956 toc_off = htab->sec_info[i->id].toc_off;
11957 break;
11958 }
11959
11960 /* Make sure the whole pasted function uses the same toc offset. */
11961 if (toc_off != 0)
11962 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
11963 htab->sec_info[i->id].toc_off = toc_off;
11964 }
11965 return TRUE;
11966 }
11967
11968 bfd_boolean
11969 ppc64_elf_check_init_fini (struct bfd_link_info *info)
11970 {
11971 return (check_pasted_section (info, ".init")
11972 & check_pasted_section (info, ".fini"));
11973 }
11974
11975 /* See whether we can group stub sections together. Grouping stub
11976 sections may result in fewer stubs. More importantly, we need to
11977 put all .init* and .fini* stubs at the beginning of the .init or
11978 .fini output sections respectively, because glibc splits the
11979 _init and _fini functions into multiple parts. Putting a stub in
11980 the middle of a function is not a good idea. */
11981
11982 static bfd_boolean
11983 group_sections (struct bfd_link_info *info,
11984 bfd_size_type stub_group_size,
11985 bfd_boolean stubs_always_before_branch)
11986 {
11987 struct ppc_link_hash_table *htab;
11988 asection *osec;
11989 bfd_size_type stub14_group_size;
11990 bfd_boolean suppress_size_errors;
11991
11992 htab = ppc_hash_table (info);
11993 if (htab == NULL)
11994 return FALSE;
11995
11996 suppress_size_errors = FALSE;
11997 stub14_group_size = stub_group_size >> 10;
11998 if (stub_group_size == 1)
11999 {
12000 /* Default values. */
12001 if (stubs_always_before_branch)
12002 {
12003 stub_group_size = 0x1e00000;
12004 stub14_group_size = 0x7800;
12005 }
12006 else
12007 {
12008 stub_group_size = 0x1c00000;
12009 stub14_group_size = 0x7000;
12010 }
12011 suppress_size_errors = TRUE;
12012 }
12013
12014 for (osec = info->output_bfd->sections; osec != NULL; osec = osec->next)
12015 {
12016 asection *tail;
12017
12018 if (osec->id >= htab->sec_info_arr_size)
12019 continue;
12020
12021 tail = htab->sec_info[osec->id].u.list;
12022 while (tail != NULL)
12023 {
12024 asection *curr;
12025 asection *prev;
12026 bfd_size_type total;
12027 bfd_boolean big_sec;
12028 bfd_vma curr_toc;
12029 struct map_stub *group;
12030
12031 curr = tail;
12032 total = tail->size;
12033 big_sec = total > (ppc64_elf_section_data (tail) != NULL
12034 && ppc64_elf_section_data (tail)->has_14bit_branch
12035 ? stub14_group_size : stub_group_size);
12036 if (big_sec && !suppress_size_errors)
12037 (*_bfd_error_handler) (_("%B section %A exceeds stub group size"),
12038 tail->owner, tail);
12039 curr_toc = htab->sec_info[tail->id].toc_off;
12040
12041 while ((prev = htab->sec_info[curr->id].u.list) != NULL
12042 && ((total += curr->output_offset - prev->output_offset)
12043 < (ppc64_elf_section_data (prev) != NULL
12044 && ppc64_elf_section_data (prev)->has_14bit_branch
12045 ? stub14_group_size : stub_group_size))
12046 && htab->sec_info[prev->id].toc_off == curr_toc)
12047 curr = prev;
12048
12049 /* OK, the size from the start of CURR to the end is less
12050 than stub_group_size and thus can be handled by one stub
12051 section. (or the tail section is itself larger than
12052 stub_group_size, in which case we may be toast.) We
12053 should really be keeping track of the total size of stubs
12054 added here, as stubs contribute to the final output
12055 section size. That's a little tricky, and this way will
12056 only break if stubs added make the total size more than
12057 2^25, ie. for the default stub_group_size, if stubs total
12058 more than 2097152 bytes, or nearly 75000 plt call stubs. */
12059 group = bfd_alloc (curr->owner, sizeof (*group));
12060 if (group == NULL)
12061 return FALSE;
12062 group->link_sec = curr;
12063 group->stub_sec = NULL;
12064 group->needs_save_res = 0;
12065 group->next = htab->group;
12066 htab->group = group;
12067 do
12068 {
12069 prev = htab->sec_info[tail->id].u.list;
12070 /* Set up this stub group. */
12071 htab->sec_info[tail->id].u.group = group;
12072 }
12073 while (tail != curr && (tail = prev) != NULL);
12074
12075 /* But wait, there's more! Input sections up to stub_group_size
12076 bytes before the stub section can be handled by it too.
12077 Don't do this if we have a really large section after the
12078 stubs, as adding more stubs increases the chance that
12079 branches may not reach into the stub section. */
12080 if (!stubs_always_before_branch && !big_sec)
12081 {
12082 total = 0;
12083 while (prev != NULL
12084 && ((total += tail->output_offset - prev->output_offset)
12085 < (ppc64_elf_section_data (prev) != NULL
12086 && ppc64_elf_section_data (prev)->has_14bit_branch
12087 ? stub14_group_size : stub_group_size))
12088 && htab->sec_info[prev->id].toc_off == curr_toc)
12089 {
12090 tail = prev;
12091 prev = htab->sec_info[tail->id].u.list;
12092 htab->sec_info[tail->id].u.group = group;
12093 }
12094 }
12095 tail = prev;
12096 }
12097 }
12098 return TRUE;
12099 }
12100
12101 static const unsigned char glink_eh_frame_cie[] =
12102 {
12103 0, 0, 0, 16, /* length. */
12104 0, 0, 0, 0, /* id. */
12105 1, /* CIE version. */
12106 'z', 'R', 0, /* Augmentation string. */
12107 4, /* Code alignment. */
12108 0x78, /* Data alignment. */
12109 65, /* RA reg. */
12110 1, /* Augmentation size. */
12111 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
12112 DW_CFA_def_cfa, 1, 0, /* def_cfa: r1 offset 0. */
12113 0, 0, 0, 0
12114 };
12115
12116 /* Stripping output sections is normally done before dynamic section
12117 symbols have been allocated. This function is called later, and
12118 handles cases like htab->brlt which is mapped to its own output
12119 section. */
12120
12121 static void
12122 maybe_strip_output (struct bfd_link_info *info, asection *isec)
12123 {
12124 if (isec->size == 0
12125 && isec->output_section->size == 0
12126 && !(isec->output_section->flags & SEC_KEEP)
12127 && !bfd_section_removed_from_list (info->output_bfd,
12128 isec->output_section)
12129 && elf_section_data (isec->output_section)->dynindx == 0)
12130 {
12131 isec->output_section->flags |= SEC_EXCLUDE;
12132 bfd_section_list_remove (info->output_bfd, isec->output_section);
12133 info->output_bfd->section_count--;
12134 }
12135 }
12136
12137 /* Determine and set the size of the stub section for a final link.
12138
12139 The basic idea here is to examine all the relocations looking for
12140 PC-relative calls to a target that is unreachable with a "bl"
12141 instruction. */
12142
12143 bfd_boolean
12144 ppc64_elf_size_stubs (struct bfd_link_info *info)
12145 {
12146 bfd_size_type stub_group_size;
12147 bfd_boolean stubs_always_before_branch;
12148 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12149
12150 if (htab == NULL)
12151 return FALSE;
12152
12153 if (htab->params->plt_thread_safe == -1 && !bfd_link_executable (info))
12154 htab->params->plt_thread_safe = 1;
12155 if (!htab->opd_abi)
12156 htab->params->plt_thread_safe = 0;
12157 else if (htab->params->plt_thread_safe == -1)
12158 {
12159 static const char *const thread_starter[] =
12160 {
12161 "pthread_create",
12162 /* libstdc++ */
12163 "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE",
12164 /* librt */
12165 "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio",
12166 "mq_notify", "create_timer",
12167 /* libanl */
12168 "getaddrinfo_a",
12169 /* libgomp */
12170 "GOMP_parallel",
12171 "GOMP_parallel_start",
12172 "GOMP_parallel_loop_static",
12173 "GOMP_parallel_loop_static_start",
12174 "GOMP_parallel_loop_dynamic",
12175 "GOMP_parallel_loop_dynamic_start",
12176 "GOMP_parallel_loop_guided",
12177 "GOMP_parallel_loop_guided_start",
12178 "GOMP_parallel_loop_runtime",
12179 "GOMP_parallel_loop_runtime_start",
12180 "GOMP_parallel_sections",
12181 "GOMP_parallel_sections_start",
12182 /* libgo */
12183 "__go_go",
12184 };
12185 unsigned i;
12186
12187 for (i = 0; i < ARRAY_SIZE (thread_starter); i++)
12188 {
12189 struct elf_link_hash_entry *h;
12190 h = elf_link_hash_lookup (&htab->elf, thread_starter[i],
12191 FALSE, FALSE, TRUE);
12192 htab->params->plt_thread_safe = h != NULL && h->ref_regular;
12193 if (htab->params->plt_thread_safe)
12194 break;
12195 }
12196 }
12197 stubs_always_before_branch = htab->params->group_size < 0;
12198 if (htab->params->group_size < 0)
12199 stub_group_size = -htab->params->group_size;
12200 else
12201 stub_group_size = htab->params->group_size;
12202
12203 if (!group_sections (info, stub_group_size, stubs_always_before_branch))
12204 return FALSE;
12205
12206 #define STUB_SHRINK_ITER 20
12207 /* Loop until no stubs added. After iteration 20 of this loop we may
12208 exit on a stub section shrinking. This is to break out of a
12209 pathological case where adding stubs on one iteration decreases
12210 section gaps (perhaps due to alignment), which then requires
12211 fewer or smaller stubs on the next iteration. */
12212
12213 while (1)
12214 {
12215 bfd *input_bfd;
12216 unsigned int bfd_indx;
12217 struct map_stub *group;
12218 asection *stub_sec;
12219
12220 htab->stub_iteration += 1;
12221
12222 for (input_bfd = info->input_bfds, bfd_indx = 0;
12223 input_bfd != NULL;
12224 input_bfd = input_bfd->link.next, bfd_indx++)
12225 {
12226 Elf_Internal_Shdr *symtab_hdr;
12227 asection *section;
12228 Elf_Internal_Sym *local_syms = NULL;
12229
12230 if (!is_ppc64_elf (input_bfd))
12231 continue;
12232
12233 /* We'll need the symbol table in a second. */
12234 symtab_hdr = &elf_symtab_hdr (input_bfd);
12235 if (symtab_hdr->sh_info == 0)
12236 continue;
12237
12238 /* Walk over each section attached to the input bfd. */
12239 for (section = input_bfd->sections;
12240 section != NULL;
12241 section = section->next)
12242 {
12243 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
12244
12245 /* If there aren't any relocs, then there's nothing more
12246 to do. */
12247 if ((section->flags & SEC_RELOC) == 0
12248 || (section->flags & SEC_ALLOC) == 0
12249 || (section->flags & SEC_LOAD) == 0
12250 || (section->flags & SEC_CODE) == 0
12251 || section->reloc_count == 0)
12252 continue;
12253
12254 /* If this section is a link-once section that will be
12255 discarded, then don't create any stubs. */
12256 if (section->output_section == NULL
12257 || section->output_section->owner != info->output_bfd)
12258 continue;
12259
12260 /* Get the relocs. */
12261 internal_relocs
12262 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
12263 info->keep_memory);
12264 if (internal_relocs == NULL)
12265 goto error_ret_free_local;
12266
12267 /* Now examine each relocation. */
12268 irela = internal_relocs;
12269 irelaend = irela + section->reloc_count;
12270 for (; irela < irelaend; irela++)
12271 {
12272 enum elf_ppc64_reloc_type r_type;
12273 unsigned int r_indx;
12274 enum ppc_stub_type stub_type;
12275 struct ppc_stub_hash_entry *stub_entry;
12276 asection *sym_sec, *code_sec;
12277 bfd_vma sym_value, code_value;
12278 bfd_vma destination;
12279 unsigned long local_off;
12280 bfd_boolean ok_dest;
12281 struct ppc_link_hash_entry *hash;
12282 struct ppc_link_hash_entry *fdh;
12283 struct elf_link_hash_entry *h;
12284 Elf_Internal_Sym *sym;
12285 char *stub_name;
12286 const asection *id_sec;
12287 struct _opd_sec_data *opd;
12288 struct plt_entry *plt_ent;
12289
12290 r_type = ELF64_R_TYPE (irela->r_info);
12291 r_indx = ELF64_R_SYM (irela->r_info);
12292
12293 if (r_type >= R_PPC64_max)
12294 {
12295 bfd_set_error (bfd_error_bad_value);
12296 goto error_ret_free_internal;
12297 }
12298
12299 /* Only look for stubs on branch instructions. */
12300 if (r_type != R_PPC64_REL24
12301 && r_type != R_PPC64_REL14
12302 && r_type != R_PPC64_REL14_BRTAKEN
12303 && r_type != R_PPC64_REL14_BRNTAKEN)
12304 continue;
12305
12306 /* Now determine the call target, its name, value,
12307 section. */
12308 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
12309 r_indx, input_bfd))
12310 goto error_ret_free_internal;
12311 hash = (struct ppc_link_hash_entry *) h;
12312
12313 ok_dest = FALSE;
12314 fdh = NULL;
12315 sym_value = 0;
12316 if (hash == NULL)
12317 {
12318 sym_value = sym->st_value;
12319 if (sym_sec != NULL
12320 && sym_sec->output_section != NULL)
12321 ok_dest = TRUE;
12322 }
12323 else if (hash->elf.root.type == bfd_link_hash_defined
12324 || hash->elf.root.type == bfd_link_hash_defweak)
12325 {
12326 sym_value = hash->elf.root.u.def.value;
12327 if (sym_sec->output_section != NULL)
12328 ok_dest = TRUE;
12329 }
12330 else if (hash->elf.root.type == bfd_link_hash_undefweak
12331 || hash->elf.root.type == bfd_link_hash_undefined)
12332 {
12333 /* Recognise an old ABI func code entry sym, and
12334 use the func descriptor sym instead if it is
12335 defined. */
12336 if (hash->elf.root.root.string[0] == '.'
12337 && (fdh = lookup_fdh (hash, htab)) != NULL)
12338 {
12339 if (fdh->elf.root.type == bfd_link_hash_defined
12340 || fdh->elf.root.type == bfd_link_hash_defweak)
12341 {
12342 sym_sec = fdh->elf.root.u.def.section;
12343 sym_value = fdh->elf.root.u.def.value;
12344 if (sym_sec->output_section != NULL)
12345 ok_dest = TRUE;
12346 }
12347 else
12348 fdh = NULL;
12349 }
12350 }
12351 else
12352 {
12353 bfd_set_error (bfd_error_bad_value);
12354 goto error_ret_free_internal;
12355 }
12356
12357 destination = 0;
12358 local_off = 0;
12359 if (ok_dest)
12360 {
12361 sym_value += irela->r_addend;
12362 destination = (sym_value
12363 + sym_sec->output_offset
12364 + sym_sec->output_section->vma);
12365 local_off = PPC64_LOCAL_ENTRY_OFFSET (hash
12366 ? hash->elf.other
12367 : sym->st_other);
12368 }
12369
12370 code_sec = sym_sec;
12371 code_value = sym_value;
12372 opd = get_opd_info (sym_sec);
12373 if (opd != NULL)
12374 {
12375 bfd_vma dest;
12376
12377 if (hash == NULL && opd->adjust != NULL)
12378 {
12379 long adjust = opd->adjust[OPD_NDX (sym_value)];
12380 if (adjust == -1)
12381 continue;
12382 code_value += adjust;
12383 sym_value += adjust;
12384 }
12385 dest = opd_entry_value (sym_sec, sym_value,
12386 &code_sec, &code_value, FALSE);
12387 if (dest != (bfd_vma) -1)
12388 {
12389 destination = dest;
12390 if (fdh != NULL)
12391 {
12392 /* Fixup old ABI sym to point at code
12393 entry. */
12394 hash->elf.root.type = bfd_link_hash_defweak;
12395 hash->elf.root.u.def.section = code_sec;
12396 hash->elf.root.u.def.value = code_value;
12397 }
12398 }
12399 }
12400
12401 /* Determine what (if any) linker stub is needed. */
12402 plt_ent = NULL;
12403 stub_type = ppc_type_of_stub (section, irela, &hash,
12404 &plt_ent, destination,
12405 local_off);
12406
12407 if (stub_type != ppc_stub_plt_call)
12408 {
12409 /* Check whether we need a TOC adjusting stub.
12410 Since the linker pastes together pieces from
12411 different object files when creating the
12412 _init and _fini functions, it may be that a
12413 call to what looks like a local sym is in
12414 fact a call needing a TOC adjustment. */
12415 if (code_sec != NULL
12416 && code_sec->output_section != NULL
12417 && (htab->sec_info[code_sec->id].toc_off
12418 != htab->sec_info[section->id].toc_off)
12419 && (code_sec->has_toc_reloc
12420 || code_sec->makes_toc_func_call))
12421 stub_type = ppc_stub_long_branch_r2off;
12422 }
12423
12424 if (stub_type == ppc_stub_none)
12425 continue;
12426
12427 /* __tls_get_addr calls might be eliminated. */
12428 if (stub_type != ppc_stub_plt_call
12429 && hash != NULL
12430 && (hash == htab->tls_get_addr
12431 || hash == htab->tls_get_addr_fd)
12432 && section->has_tls_reloc
12433 && irela != internal_relocs)
12434 {
12435 /* Get tls info. */
12436 unsigned char *tls_mask;
12437
12438 if (!get_tls_mask (&tls_mask, NULL, NULL, &local_syms,
12439 irela - 1, input_bfd))
12440 goto error_ret_free_internal;
12441 if (*tls_mask != 0)
12442 continue;
12443 }
12444
12445 if (stub_type == ppc_stub_plt_call
12446 && irela + 1 < irelaend
12447 && irela[1].r_offset == irela->r_offset + 4
12448 && ELF64_R_TYPE (irela[1].r_info) == R_PPC64_TOCSAVE)
12449 {
12450 if (!tocsave_find (htab, INSERT,
12451 &local_syms, irela + 1, input_bfd))
12452 goto error_ret_free_internal;
12453 }
12454 else if (stub_type == ppc_stub_plt_call)
12455 stub_type = ppc_stub_plt_call_r2save;
12456
12457 /* Support for grouping stub sections. */
12458 id_sec = htab->sec_info[section->id].u.group->link_sec;
12459
12460 /* Get the name of this stub. */
12461 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
12462 if (!stub_name)
12463 goto error_ret_free_internal;
12464
12465 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
12466 stub_name, FALSE, FALSE);
12467 if (stub_entry != NULL)
12468 {
12469 /* The proper stub has already been created. */
12470 free (stub_name);
12471 if (stub_type == ppc_stub_plt_call_r2save)
12472 stub_entry->stub_type = stub_type;
12473 continue;
12474 }
12475
12476 stub_entry = ppc_add_stub (stub_name, section, info);
12477 if (stub_entry == NULL)
12478 {
12479 free (stub_name);
12480 error_ret_free_internal:
12481 if (elf_section_data (section)->relocs == NULL)
12482 free (internal_relocs);
12483 error_ret_free_local:
12484 if (local_syms != NULL
12485 && (symtab_hdr->contents
12486 != (unsigned char *) local_syms))
12487 free (local_syms);
12488 return FALSE;
12489 }
12490
12491 stub_entry->stub_type = stub_type;
12492 if (stub_type != ppc_stub_plt_call
12493 && stub_type != ppc_stub_plt_call_r2save)
12494 {
12495 stub_entry->target_value = code_value;
12496 stub_entry->target_section = code_sec;
12497 }
12498 else
12499 {
12500 stub_entry->target_value = sym_value;
12501 stub_entry->target_section = sym_sec;
12502 }
12503 stub_entry->h = hash;
12504 stub_entry->plt_ent = plt_ent;
12505 stub_entry->other = hash ? hash->elf.other : sym->st_other;
12506
12507 if (stub_entry->h != NULL)
12508 htab->stub_globals += 1;
12509 }
12510
12511 /* We're done with the internal relocs, free them. */
12512 if (elf_section_data (section)->relocs != internal_relocs)
12513 free (internal_relocs);
12514 }
12515
12516 if (local_syms != NULL
12517 && symtab_hdr->contents != (unsigned char *) local_syms)
12518 {
12519 if (!info->keep_memory)
12520 free (local_syms);
12521 else
12522 symtab_hdr->contents = (unsigned char *) local_syms;
12523 }
12524 }
12525
12526 /* We may have added some stubs. Find out the new size of the
12527 stub sections. */
12528 for (stub_sec = htab->params->stub_bfd->sections;
12529 stub_sec != NULL;
12530 stub_sec = stub_sec->next)
12531 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12532 {
12533 stub_sec->rawsize = stub_sec->size;
12534 stub_sec->size = 0;
12535 stub_sec->reloc_count = 0;
12536 stub_sec->flags &= ~SEC_RELOC;
12537 }
12538
12539 htab->brlt->size = 0;
12540 htab->brlt->reloc_count = 0;
12541 htab->brlt->flags &= ~SEC_RELOC;
12542 if (htab->relbrlt != NULL)
12543 htab->relbrlt->size = 0;
12544
12545 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
12546
12547 for (group = htab->group; group != NULL; group = group->next)
12548 if (group->needs_save_res)
12549 group->stub_sec->size += htab->sfpr->size;
12550
12551 if (info->emitrelocations
12552 && htab->glink != NULL && htab->glink->size != 0)
12553 {
12554 htab->glink->reloc_count = 1;
12555 htab->glink->flags |= SEC_RELOC;
12556 }
12557
12558 if (htab->glink_eh_frame != NULL
12559 && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
12560 && htab->glink_eh_frame->output_section->size != 0)
12561 {
12562 size_t size = 0, align;
12563
12564 for (stub_sec = htab->params->stub_bfd->sections;
12565 stub_sec != NULL;
12566 stub_sec = stub_sec->next)
12567 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12568 size += 24;
12569 if (htab->glink != NULL && htab->glink->size != 0)
12570 size += 24;
12571 if (size != 0)
12572 size += sizeof (glink_eh_frame_cie);
12573 align = 1;
12574 align <<= htab->glink_eh_frame->output_section->alignment_power;
12575 align -= 1;
12576 size = (size + align) & ~align;
12577 htab->glink_eh_frame->rawsize = htab->glink_eh_frame->size;
12578 htab->glink_eh_frame->size = size;
12579 }
12580
12581 if (htab->params->plt_stub_align != 0)
12582 for (stub_sec = htab->params->stub_bfd->sections;
12583 stub_sec != NULL;
12584 stub_sec = stub_sec->next)
12585 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12586 stub_sec->size = ((stub_sec->size
12587 + (1 << htab->params->plt_stub_align) - 1)
12588 & -(1 << htab->params->plt_stub_align));
12589
12590 for (stub_sec = htab->params->stub_bfd->sections;
12591 stub_sec != NULL;
12592 stub_sec = stub_sec->next)
12593 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
12594 && stub_sec->rawsize != stub_sec->size
12595 && (htab->stub_iteration <= STUB_SHRINK_ITER
12596 || stub_sec->rawsize < stub_sec->size))
12597 break;
12598
12599 if (stub_sec == NULL
12600 && (htab->glink_eh_frame == NULL
12601 || htab->glink_eh_frame->rawsize == htab->glink_eh_frame->size))
12602 break;
12603
12604 /* Ask the linker to do its stuff. */
12605 (*htab->params->layout_sections_again) ();
12606 }
12607
12608 if (htab->glink_eh_frame != NULL
12609 && htab->glink_eh_frame->size != 0)
12610 {
12611 bfd_vma val;
12612 bfd_byte *p, *last_fde;
12613 size_t last_fde_len, size, align, pad;
12614 asection *stub_sec;
12615
12616 p = bfd_zalloc (htab->glink_eh_frame->owner, htab->glink_eh_frame->size);
12617 if (p == NULL)
12618 return FALSE;
12619 htab->glink_eh_frame->contents = p;
12620 last_fde = p;
12621
12622 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
12623 /* CIE length (rewrite in case little-endian). */
12624 last_fde_len = sizeof (glink_eh_frame_cie) - 4;
12625 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
12626 p += sizeof (glink_eh_frame_cie);
12627
12628 for (stub_sec = htab->params->stub_bfd->sections;
12629 stub_sec != NULL;
12630 stub_sec = stub_sec->next)
12631 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12632 {
12633 last_fde = p;
12634 last_fde_len = 20;
12635 /* FDE length. */
12636 bfd_put_32 (htab->elf.dynobj, 20, p);
12637 p += 4;
12638 /* CIE pointer. */
12639 val = p - htab->glink_eh_frame->contents;
12640 bfd_put_32 (htab->elf.dynobj, val, p);
12641 p += 4;
12642 /* Offset to stub section, written later. */
12643 p += 4;
12644 /* stub section size. */
12645 bfd_put_32 (htab->elf.dynobj, stub_sec->size, p);
12646 p += 4;
12647 /* Augmentation. */
12648 p += 1;
12649 /* Pad. */
12650 p += 7;
12651 }
12652 if (htab->glink != NULL && htab->glink->size != 0)
12653 {
12654 last_fde = p;
12655 last_fde_len = 20;
12656 /* FDE length. */
12657 bfd_put_32 (htab->elf.dynobj, 20, p);
12658 p += 4;
12659 /* CIE pointer. */
12660 val = p - htab->glink_eh_frame->contents;
12661 bfd_put_32 (htab->elf.dynobj, val, p);
12662 p += 4;
12663 /* Offset to .glink, written later. */
12664 p += 4;
12665 /* .glink size. */
12666 bfd_put_32 (htab->elf.dynobj, htab->glink->size - 8, p);
12667 p += 4;
12668 /* Augmentation. */
12669 p += 1;
12670
12671 *p++ = DW_CFA_advance_loc + 1;
12672 *p++ = DW_CFA_register;
12673 *p++ = 65;
12674 *p++ = htab->opd_abi ? 12 : 0;
12675 *p++ = DW_CFA_advance_loc + 4;
12676 *p++ = DW_CFA_restore_extended;
12677 *p++ = 65;
12678 }
12679 /* Subsume any padding into the last FDE if user .eh_frame
12680 sections are aligned more than glink_eh_frame. Otherwise any
12681 zero padding will be seen as a terminator. */
12682 size = p - htab->glink_eh_frame->contents;
12683 align = 1;
12684 align <<= htab->glink_eh_frame->output_section->alignment_power;
12685 align -= 1;
12686 pad = ((size + align) & ~align) - size;
12687 htab->glink_eh_frame->size = size + pad;
12688 bfd_put_32 (htab->elf.dynobj, last_fde_len + pad, last_fde);
12689 }
12690
12691 maybe_strip_output (info, htab->brlt);
12692 if (htab->glink_eh_frame != NULL)
12693 maybe_strip_output (info, htab->glink_eh_frame);
12694
12695 return TRUE;
12696 }
12697
12698 /* Called after we have determined section placement. If sections
12699 move, we'll be called again. Provide a value for TOCstart. */
12700
12701 bfd_vma
12702 ppc64_elf_set_toc (struct bfd_link_info *info, bfd *obfd)
12703 {
12704 asection *s;
12705 bfd_vma TOCstart, adjust;
12706
12707 if (info != NULL)
12708 {
12709 struct elf_link_hash_entry *h;
12710 struct elf_link_hash_table *htab = elf_hash_table (info);
12711
12712 if (is_elf_hash_table (htab)
12713 && htab->hgot != NULL)
12714 h = htab->hgot;
12715 else
12716 {
12717 h = elf_link_hash_lookup (htab, ".TOC.", FALSE, FALSE, TRUE);
12718 if (is_elf_hash_table (htab))
12719 htab->hgot = h;
12720 }
12721 if (h != NULL
12722 && h->root.type == bfd_link_hash_defined
12723 && !h->root.linker_def
12724 && (!is_elf_hash_table (htab)
12725 || h->def_regular))
12726 {
12727 TOCstart = (h->root.u.def.value - TOC_BASE_OFF
12728 + h->root.u.def.section->output_offset
12729 + h->root.u.def.section->output_section->vma);
12730 _bfd_set_gp_value (obfd, TOCstart);
12731 return TOCstart;
12732 }
12733 }
12734
12735 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
12736 order. The TOC starts where the first of these sections starts. */
12737 s = bfd_get_section_by_name (obfd, ".got");
12738 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12739 s = bfd_get_section_by_name (obfd, ".toc");
12740 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12741 s = bfd_get_section_by_name (obfd, ".tocbss");
12742 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12743 s = bfd_get_section_by_name (obfd, ".plt");
12744 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12745 {
12746 /* This may happen for
12747 o references to TOC base (SYM@toc / TOC[tc0]) without a
12748 .toc directive
12749 o bad linker script
12750 o --gc-sections and empty TOC sections
12751
12752 FIXME: Warn user? */
12753
12754 /* Look for a likely section. We probably won't even be
12755 using TOCstart. */
12756 for (s = obfd->sections; s != NULL; s = s->next)
12757 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY
12758 | SEC_EXCLUDE))
12759 == (SEC_ALLOC | SEC_SMALL_DATA))
12760 break;
12761 if (s == NULL)
12762 for (s = obfd->sections; s != NULL; s = s->next)
12763 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_EXCLUDE))
12764 == (SEC_ALLOC | SEC_SMALL_DATA))
12765 break;
12766 if (s == NULL)
12767 for (s = obfd->sections; s != NULL; s = s->next)
12768 if ((s->flags & (SEC_ALLOC | SEC_READONLY | SEC_EXCLUDE))
12769 == SEC_ALLOC)
12770 break;
12771 if (s == NULL)
12772 for (s = obfd->sections; s != NULL; s = s->next)
12773 if ((s->flags & (SEC_ALLOC | SEC_EXCLUDE)) == SEC_ALLOC)
12774 break;
12775 }
12776
12777 TOCstart = 0;
12778 if (s != NULL)
12779 TOCstart = s->output_section->vma + s->output_offset;
12780
12781 /* Force alignment. */
12782 adjust = TOCstart & (TOC_BASE_ALIGN - 1);
12783 TOCstart -= adjust;
12784 _bfd_set_gp_value (obfd, TOCstart);
12785
12786 if (info != NULL && s != NULL)
12787 {
12788 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12789
12790 if (htab != NULL)
12791 {
12792 if (htab->elf.hgot != NULL)
12793 {
12794 htab->elf.hgot->root.u.def.value = TOC_BASE_OFF - adjust;
12795 htab->elf.hgot->root.u.def.section = s;
12796 }
12797 }
12798 else
12799 {
12800 struct bfd_link_hash_entry *bh = NULL;
12801 _bfd_generic_link_add_one_symbol (info, obfd, ".TOC.", BSF_GLOBAL,
12802 s, TOC_BASE_OFF - adjust,
12803 NULL, FALSE, FALSE, &bh);
12804 }
12805 }
12806 return TOCstart;
12807 }
12808
12809 /* Called via elf_link_hash_traverse from ppc64_elf_build_stubs to
12810 write out any global entry stubs. */
12811
12812 static bfd_boolean
12813 build_global_entry_stubs (struct elf_link_hash_entry *h, void *inf)
12814 {
12815 struct bfd_link_info *info;
12816 struct ppc_link_hash_table *htab;
12817 struct plt_entry *pent;
12818 asection *s;
12819
12820 if (h->root.type == bfd_link_hash_indirect)
12821 return TRUE;
12822
12823 if (!h->pointer_equality_needed)
12824 return TRUE;
12825
12826 if (h->def_regular)
12827 return TRUE;
12828
12829 info = inf;
12830 htab = ppc_hash_table (info);
12831 if (htab == NULL)
12832 return FALSE;
12833
12834 s = htab->glink;
12835 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
12836 if (pent->plt.offset != (bfd_vma) -1
12837 && pent->addend == 0)
12838 {
12839 bfd_byte *p;
12840 asection *plt;
12841 bfd_vma off;
12842
12843 p = s->contents + h->root.u.def.value;
12844 plt = htab->elf.splt;
12845 if (!htab->elf.dynamic_sections_created
12846 || h->dynindx == -1)
12847 plt = htab->elf.iplt;
12848 off = pent->plt.offset + plt->output_offset + plt->output_section->vma;
12849 off -= h->root.u.def.value + s->output_offset + s->output_section->vma;
12850
12851 if (off + 0x80008000 > 0xffffffff || (off & 3) != 0)
12852 {
12853 info->callbacks->einfo
12854 (_("%P: linkage table error against `%T'\n"),
12855 h->root.root.string);
12856 bfd_set_error (bfd_error_bad_value);
12857 htab->stub_error = TRUE;
12858 }
12859
12860 htab->stub_count[ppc_stub_global_entry - 1] += 1;
12861 if (htab->params->emit_stub_syms)
12862 {
12863 size_t len = strlen (h->root.root.string);
12864 char *name = bfd_malloc (sizeof "12345678.global_entry." + len);
12865
12866 if (name == NULL)
12867 return FALSE;
12868
12869 sprintf (name, "%08x.global_entry.%s", s->id, h->root.root.string);
12870 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
12871 if (h == NULL)
12872 return FALSE;
12873 if (h->root.type == bfd_link_hash_new)
12874 {
12875 h->root.type = bfd_link_hash_defined;
12876 h->root.u.def.section = s;
12877 h->root.u.def.value = p - s->contents;
12878 h->ref_regular = 1;
12879 h->def_regular = 1;
12880 h->ref_regular_nonweak = 1;
12881 h->forced_local = 1;
12882 h->non_elf = 0;
12883 h->root.linker_def = 1;
12884 }
12885 }
12886
12887 if (PPC_HA (off) != 0)
12888 {
12889 bfd_put_32 (s->owner, ADDIS_R12_R12 | PPC_HA (off), p);
12890 p += 4;
12891 }
12892 bfd_put_32 (s->owner, LD_R12_0R12 | PPC_LO (off), p);
12893 p += 4;
12894 bfd_put_32 (s->owner, MTCTR_R12, p);
12895 p += 4;
12896 bfd_put_32 (s->owner, BCTR, p);
12897 break;
12898 }
12899 return TRUE;
12900 }
12901
12902 /* Build all the stubs associated with the current output file.
12903 The stubs are kept in a hash table attached to the main linker
12904 hash table. This function is called via gldelf64ppc_finish. */
12905
12906 bfd_boolean
12907 ppc64_elf_build_stubs (struct bfd_link_info *info,
12908 char **stats)
12909 {
12910 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12911 struct map_stub *group;
12912 asection *stub_sec;
12913 bfd_byte *p;
12914 int stub_sec_count = 0;
12915
12916 if (htab == NULL)
12917 return FALSE;
12918
12919 /* Allocate memory to hold the linker stubs. */
12920 for (stub_sec = htab->params->stub_bfd->sections;
12921 stub_sec != NULL;
12922 stub_sec = stub_sec->next)
12923 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
12924 && stub_sec->size != 0)
12925 {
12926 stub_sec->contents = bfd_zalloc (htab->params->stub_bfd, stub_sec->size);
12927 if (stub_sec->contents == NULL)
12928 return FALSE;
12929 stub_sec->size = 0;
12930 }
12931
12932 if (htab->glink != NULL && htab->glink->size != 0)
12933 {
12934 unsigned int indx;
12935 bfd_vma plt0;
12936
12937 /* Build the .glink plt call stub. */
12938 if (htab->params->emit_stub_syms)
12939 {
12940 struct elf_link_hash_entry *h;
12941 h = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
12942 TRUE, FALSE, FALSE);
12943 if (h == NULL)
12944 return FALSE;
12945 if (h->root.type == bfd_link_hash_new)
12946 {
12947 h->root.type = bfd_link_hash_defined;
12948 h->root.u.def.section = htab->glink;
12949 h->root.u.def.value = 8;
12950 h->ref_regular = 1;
12951 h->def_regular = 1;
12952 h->ref_regular_nonweak = 1;
12953 h->forced_local = 1;
12954 h->non_elf = 0;
12955 h->root.linker_def = 1;
12956 }
12957 }
12958 plt0 = (htab->elf.splt->output_section->vma
12959 + htab->elf.splt->output_offset
12960 - 16);
12961 if (info->emitrelocations)
12962 {
12963 Elf_Internal_Rela *r = get_relocs (htab->glink, 1);
12964 if (r == NULL)
12965 return FALSE;
12966 r->r_offset = (htab->glink->output_offset
12967 + htab->glink->output_section->vma);
12968 r->r_info = ELF64_R_INFO (0, R_PPC64_REL64);
12969 r->r_addend = plt0;
12970 }
12971 p = htab->glink->contents;
12972 plt0 -= htab->glink->output_section->vma + htab->glink->output_offset;
12973 bfd_put_64 (htab->glink->owner, plt0, p);
12974 p += 8;
12975 if (htab->opd_abi)
12976 {
12977 bfd_put_32 (htab->glink->owner, MFLR_R12, p);
12978 p += 4;
12979 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
12980 p += 4;
12981 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
12982 p += 4;
12983 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | (-16 & 0xfffc), p);
12984 p += 4;
12985 bfd_put_32 (htab->glink->owner, MTLR_R12, p);
12986 p += 4;
12987 bfd_put_32 (htab->glink->owner, ADD_R11_R2_R11, p);
12988 p += 4;
12989 bfd_put_32 (htab->glink->owner, LD_R12_0R11, p);
12990 p += 4;
12991 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | 8, p);
12992 p += 4;
12993 bfd_put_32 (htab->glink->owner, MTCTR_R12, p);
12994 p += 4;
12995 bfd_put_32 (htab->glink->owner, LD_R11_0R11 | 16, p);
12996 p += 4;
12997 }
12998 else
12999 {
13000 bfd_put_32 (htab->glink->owner, MFLR_R0, p);
13001 p += 4;
13002 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
13003 p += 4;
13004 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
13005 p += 4;
13006 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | (-16 & 0xfffc), p);
13007 p += 4;
13008 bfd_put_32 (htab->glink->owner, MTLR_R0, p);
13009 p += 4;
13010 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
13011 p += 4;
13012 bfd_put_32 (htab->glink->owner, ADD_R11_R2_R11, p);
13013 p += 4;
13014 bfd_put_32 (htab->glink->owner, ADDI_R0_R12 | (-48 & 0xffff), p);
13015 p += 4;
13016 bfd_put_32 (htab->glink->owner, LD_R12_0R11, p);
13017 p += 4;
13018 bfd_put_32 (htab->glink->owner, SRDI_R0_R0_2, p);
13019 p += 4;
13020 bfd_put_32 (htab->glink->owner, MTCTR_R12, p);
13021 p += 4;
13022 bfd_put_32 (htab->glink->owner, LD_R11_0R11 | 8, p);
13023 p += 4;
13024 }
13025 bfd_put_32 (htab->glink->owner, BCTR, p);
13026 p += 4;
13027 while (p - htab->glink->contents < GLINK_CALL_STUB_SIZE)
13028 {
13029 bfd_put_32 (htab->glink->owner, NOP, p);
13030 p += 4;
13031 }
13032
13033 /* Build the .glink lazy link call stubs. */
13034 indx = 0;
13035 while (p < htab->glink->contents + htab->glink->rawsize)
13036 {
13037 if (htab->opd_abi)
13038 {
13039 if (indx < 0x8000)
13040 {
13041 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
13042 p += 4;
13043 }
13044 else
13045 {
13046 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
13047 p += 4;
13048 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx),
13049 p);
13050 p += 4;
13051 }
13052 }
13053 bfd_put_32 (htab->glink->owner,
13054 B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p);
13055 indx++;
13056 p += 4;
13057 }
13058
13059 /* Build .glink global entry stubs. */
13060 if (htab->glink->size > htab->glink->rawsize)
13061 elf_link_hash_traverse (&htab->elf, build_global_entry_stubs, info);
13062 }
13063
13064 if (htab->brlt != NULL && htab->brlt->size != 0)
13065 {
13066 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
13067 htab->brlt->size);
13068 if (htab->brlt->contents == NULL)
13069 return FALSE;
13070 }
13071 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
13072 {
13073 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
13074 htab->relbrlt->size);
13075 if (htab->relbrlt->contents == NULL)
13076 return FALSE;
13077 }
13078
13079 /* Build the stubs as directed by the stub hash table. */
13080 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
13081
13082 for (group = htab->group; group != NULL; group = group->next)
13083 if (group->needs_save_res)
13084 {
13085 stub_sec = group->stub_sec;
13086 memcpy (stub_sec->contents + stub_sec->size, htab->sfpr->contents,
13087 htab->sfpr->size);
13088 if (htab->params->emit_stub_syms)
13089 {
13090 unsigned int i;
13091
13092 for (i = 0; i < ARRAY_SIZE (save_res_funcs); i++)
13093 if (!sfpr_define (info, &save_res_funcs[i], stub_sec))
13094 return FALSE;
13095 }
13096 stub_sec->size += htab->sfpr->size;
13097 }
13098
13099 if (htab->relbrlt != NULL)
13100 htab->relbrlt->reloc_count = 0;
13101
13102 if (htab->params->plt_stub_align != 0)
13103 for (stub_sec = htab->params->stub_bfd->sections;
13104 stub_sec != NULL;
13105 stub_sec = stub_sec->next)
13106 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
13107 stub_sec->size = ((stub_sec->size
13108 + (1 << htab->params->plt_stub_align) - 1)
13109 & -(1 << htab->params->plt_stub_align));
13110
13111 for (stub_sec = htab->params->stub_bfd->sections;
13112 stub_sec != NULL;
13113 stub_sec = stub_sec->next)
13114 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
13115 {
13116 stub_sec_count += 1;
13117 if (stub_sec->rawsize != stub_sec->size
13118 && (htab->stub_iteration <= STUB_SHRINK_ITER
13119 || stub_sec->rawsize < stub_sec->size))
13120 break;
13121 }
13122
13123 /* Note that the glink_eh_frame check here is not only testing that
13124 the generated size matched the calculated size but also that
13125 bfd_elf_discard_info didn't make any changes to the section. */
13126 if (stub_sec != NULL
13127 || (htab->glink_eh_frame != NULL
13128 && htab->glink_eh_frame->rawsize != htab->glink_eh_frame->size))
13129 {
13130 htab->stub_error = TRUE;
13131 info->callbacks->einfo (_("%P: stubs don't match calculated size\n"));
13132 }
13133
13134 if (htab->stub_error)
13135 return FALSE;
13136
13137 if (stats != NULL)
13138 {
13139 *stats = bfd_malloc (500);
13140 if (*stats == NULL)
13141 return FALSE;
13142
13143 sprintf (*stats, _("linker stubs in %u group%s\n"
13144 " branch %lu\n"
13145 " toc adjust %lu\n"
13146 " long branch %lu\n"
13147 " long toc adj %lu\n"
13148 " plt call %lu\n"
13149 " plt call toc %lu\n"
13150 " global entry %lu"),
13151 stub_sec_count,
13152 stub_sec_count == 1 ? "" : "s",
13153 htab->stub_count[ppc_stub_long_branch - 1],
13154 htab->stub_count[ppc_stub_long_branch_r2off - 1],
13155 htab->stub_count[ppc_stub_plt_branch - 1],
13156 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
13157 htab->stub_count[ppc_stub_plt_call - 1],
13158 htab->stub_count[ppc_stub_plt_call_r2save - 1],
13159 htab->stub_count[ppc_stub_global_entry - 1]);
13160 }
13161 return TRUE;
13162 }
13163
13164 /* This function undoes the changes made by add_symbol_adjust. */
13165
13166 static bfd_boolean
13167 undo_symbol_twiddle (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
13168 {
13169 struct ppc_link_hash_entry *eh;
13170
13171 if (h->root.type == bfd_link_hash_indirect)
13172 return TRUE;
13173
13174 eh = (struct ppc_link_hash_entry *) h;
13175 if (eh->elf.root.type != bfd_link_hash_undefweak || !eh->was_undefined)
13176 return TRUE;
13177
13178 eh->elf.root.type = bfd_link_hash_undefined;
13179 return TRUE;
13180 }
13181
13182 void
13183 ppc64_elf_restore_symbols (struct bfd_link_info *info)
13184 {
13185 struct ppc_link_hash_table *htab = ppc_hash_table (info);
13186
13187 if (htab != NULL)
13188 elf_link_hash_traverse (&htab->elf, undo_symbol_twiddle, info);
13189 }
13190
13191 /* What to do when ld finds relocations against symbols defined in
13192 discarded sections. */
13193
13194 static unsigned int
13195 ppc64_elf_action_discarded (asection *sec)
13196 {
13197 if (strcmp (".opd", sec->name) == 0)
13198 return 0;
13199
13200 if (strcmp (".toc", sec->name) == 0)
13201 return 0;
13202
13203 if (strcmp (".toc1", sec->name) == 0)
13204 return 0;
13205
13206 return _bfd_elf_default_action_discarded (sec);
13207 }
13208
13209 /* The RELOCATE_SECTION function is called by the ELF backend linker
13210 to handle the relocations for a section.
13211
13212 The relocs are always passed as Rela structures; if the section
13213 actually uses Rel structures, the r_addend field will always be
13214 zero.
13215
13216 This function is responsible for adjust the section contents as
13217 necessary, and (if using Rela relocs and generating a
13218 relocatable output file) adjusting the reloc addend as
13219 necessary.
13220
13221 This function does not have to worry about setting the reloc
13222 address or the reloc symbol index.
13223
13224 LOCAL_SYMS is a pointer to the swapped in local symbols.
13225
13226 LOCAL_SECTIONS is an array giving the section in the input file
13227 corresponding to the st_shndx field of each local symbol.
13228
13229 The global hash table entry for the global symbols can be found
13230 via elf_sym_hashes (input_bfd).
13231
13232 When generating relocatable output, this function must handle
13233 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
13234 going to be the section symbol corresponding to the output
13235 section, which means that the addend must be adjusted
13236 accordingly. */
13237
13238 static bfd_boolean
13239 ppc64_elf_relocate_section (bfd *output_bfd,
13240 struct bfd_link_info *info,
13241 bfd *input_bfd,
13242 asection *input_section,
13243 bfd_byte *contents,
13244 Elf_Internal_Rela *relocs,
13245 Elf_Internal_Sym *local_syms,
13246 asection **local_sections)
13247 {
13248 struct ppc_link_hash_table *htab;
13249 Elf_Internal_Shdr *symtab_hdr;
13250 struct elf_link_hash_entry **sym_hashes;
13251 Elf_Internal_Rela *rel;
13252 Elf_Internal_Rela *wrel;
13253 Elf_Internal_Rela *relend;
13254 Elf_Internal_Rela outrel;
13255 bfd_byte *loc;
13256 struct got_entry **local_got_ents;
13257 bfd_vma TOCstart;
13258 bfd_boolean ret = TRUE;
13259 bfd_boolean is_opd;
13260 /* Assume 'at' branch hints. */
13261 bfd_boolean is_isa_v2 = TRUE;
13262 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
13263
13264 /* Initialize howto table if needed. */
13265 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
13266 ppc_howto_init ();
13267
13268 htab = ppc_hash_table (info);
13269 if (htab == NULL)
13270 return FALSE;
13271
13272 /* Don't relocate stub sections. */
13273 if (input_section->owner == htab->params->stub_bfd)
13274 return TRUE;
13275
13276 BFD_ASSERT (is_ppc64_elf (input_bfd));
13277
13278 local_got_ents = elf_local_got_ents (input_bfd);
13279 TOCstart = elf_gp (output_bfd);
13280 symtab_hdr = &elf_symtab_hdr (input_bfd);
13281 sym_hashes = elf_sym_hashes (input_bfd);
13282 is_opd = ppc64_elf_section_data (input_section)->sec_type == sec_opd;
13283
13284 rel = wrel = relocs;
13285 relend = relocs + input_section->reloc_count;
13286 for (; rel < relend; wrel++, rel++)
13287 {
13288 enum elf_ppc64_reloc_type r_type;
13289 bfd_vma addend;
13290 bfd_reloc_status_type r;
13291 Elf_Internal_Sym *sym;
13292 asection *sec;
13293 struct elf_link_hash_entry *h_elf;
13294 struct ppc_link_hash_entry *h;
13295 struct ppc_link_hash_entry *fdh;
13296 const char *sym_name;
13297 unsigned long r_symndx, toc_symndx;
13298 bfd_vma toc_addend;
13299 unsigned char tls_mask, tls_gd, tls_type;
13300 unsigned char sym_type;
13301 bfd_vma relocation;
13302 bfd_boolean unresolved_reloc;
13303 bfd_boolean warned;
13304 enum { DEST_NORMAL, DEST_OPD, DEST_STUB } reloc_dest;
13305 unsigned int insn;
13306 unsigned int mask;
13307 struct ppc_stub_hash_entry *stub_entry;
13308 bfd_vma max_br_offset;
13309 bfd_vma from;
13310 Elf_Internal_Rela orig_rel;
13311 reloc_howto_type *howto;
13312 struct reloc_howto_struct alt_howto;
13313
13314 again:
13315 orig_rel = *rel;
13316
13317 r_type = ELF64_R_TYPE (rel->r_info);
13318 r_symndx = ELF64_R_SYM (rel->r_info);
13319
13320 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
13321 symbol of the previous ADDR64 reloc. The symbol gives us the
13322 proper TOC base to use. */
13323 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
13324 && wrel != relocs
13325 && ELF64_R_TYPE (wrel[-1].r_info) == R_PPC64_ADDR64
13326 && is_opd)
13327 r_symndx = ELF64_R_SYM (wrel[-1].r_info);
13328
13329 sym = NULL;
13330 sec = NULL;
13331 h_elf = NULL;
13332 sym_name = NULL;
13333 unresolved_reloc = FALSE;
13334 warned = FALSE;
13335
13336 if (r_symndx < symtab_hdr->sh_info)
13337 {
13338 /* It's a local symbol. */
13339 struct _opd_sec_data *opd;
13340
13341 sym = local_syms + r_symndx;
13342 sec = local_sections[r_symndx];
13343 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
13344 sym_type = ELF64_ST_TYPE (sym->st_info);
13345 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
13346 opd = get_opd_info (sec);
13347 if (opd != NULL && opd->adjust != NULL)
13348 {
13349 long adjust = opd->adjust[OPD_NDX (sym->st_value
13350 + rel->r_addend)];
13351 if (adjust == -1)
13352 relocation = 0;
13353 else
13354 {
13355 /* If this is a relocation against the opd section sym
13356 and we have edited .opd, adjust the reloc addend so
13357 that ld -r and ld --emit-relocs output is correct.
13358 If it is a reloc against some other .opd symbol,
13359 then the symbol value will be adjusted later. */
13360 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
13361 rel->r_addend += adjust;
13362 else
13363 relocation += adjust;
13364 }
13365 }
13366 }
13367 else
13368 {
13369 bfd_boolean ignored;
13370
13371 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
13372 r_symndx, symtab_hdr, sym_hashes,
13373 h_elf, sec, relocation,
13374 unresolved_reloc, warned, ignored);
13375 sym_name = h_elf->root.root.string;
13376 sym_type = h_elf->type;
13377 if (sec != NULL
13378 && sec->owner == output_bfd
13379 && strcmp (sec->name, ".opd") == 0)
13380 {
13381 /* This is a symbol defined in a linker script. All
13382 such are defined in output sections, even those
13383 defined by simple assignment from a symbol defined in
13384 an input section. Transfer the symbol to an
13385 appropriate input .opd section, so that a branch to
13386 this symbol will be mapped to the location specified
13387 by the opd entry. */
13388 struct bfd_link_order *lo;
13389 for (lo = sec->map_head.link_order; lo != NULL; lo = lo->next)
13390 if (lo->type == bfd_indirect_link_order)
13391 {
13392 asection *isec = lo->u.indirect.section;
13393 if (h_elf->root.u.def.value >= isec->output_offset
13394 && h_elf->root.u.def.value < (isec->output_offset
13395 + isec->size))
13396 {
13397 h_elf->root.u.def.value -= isec->output_offset;
13398 h_elf->root.u.def.section = isec;
13399 sec = isec;
13400 break;
13401 }
13402 }
13403 }
13404 }
13405 h = (struct ppc_link_hash_entry *) h_elf;
13406
13407 if (sec != NULL && discarded_section (sec))
13408 {
13409 _bfd_clear_contents (ppc64_elf_howto_table[r_type],
13410 input_bfd, input_section,
13411 contents + rel->r_offset);
13412 wrel->r_offset = rel->r_offset;
13413 wrel->r_info = 0;
13414 wrel->r_addend = 0;
13415
13416 /* For ld -r, remove relocations in debug sections against
13417 sections defined in discarded sections. Not done for
13418 non-debug to preserve relocs in .eh_frame which the
13419 eh_frame editing code expects to be present. */
13420 if (bfd_link_relocatable (info)
13421 && (input_section->flags & SEC_DEBUGGING))
13422 wrel--;
13423
13424 continue;
13425 }
13426
13427 if (bfd_link_relocatable (info))
13428 goto copy_reloc;
13429
13430 if (h != NULL && &h->elf == htab->elf.hgot)
13431 {
13432 relocation = TOCstart + htab->sec_info[input_section->id].toc_off;
13433 sec = bfd_abs_section_ptr;
13434 unresolved_reloc = FALSE;
13435 }
13436
13437 /* TLS optimizations. Replace instruction sequences and relocs
13438 based on information we collected in tls_optimize. We edit
13439 RELOCS so that --emit-relocs will output something sensible
13440 for the final instruction stream. */
13441 tls_mask = 0;
13442 tls_gd = 0;
13443 toc_symndx = 0;
13444 if (h != NULL)
13445 tls_mask = h->tls_mask;
13446 else if (local_got_ents != NULL)
13447 {
13448 struct plt_entry **local_plt = (struct plt_entry **)
13449 (local_got_ents + symtab_hdr->sh_info);
13450 unsigned char *lgot_masks = (unsigned char *)
13451 (local_plt + symtab_hdr->sh_info);
13452 tls_mask = lgot_masks[r_symndx];
13453 }
13454 if (tls_mask == 0
13455 && (r_type == R_PPC64_TLS
13456 || r_type == R_PPC64_TLSGD
13457 || r_type == R_PPC64_TLSLD))
13458 {
13459 /* Check for toc tls entries. */
13460 unsigned char *toc_tls;
13461
13462 if (!get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
13463 &local_syms, rel, input_bfd))
13464 return FALSE;
13465
13466 if (toc_tls)
13467 tls_mask = *toc_tls;
13468 }
13469
13470 /* Check that tls relocs are used with tls syms, and non-tls
13471 relocs are used with non-tls syms. */
13472 if (r_symndx != STN_UNDEF
13473 && r_type != R_PPC64_NONE
13474 && (h == NULL
13475 || h->elf.root.type == bfd_link_hash_defined
13476 || h->elf.root.type == bfd_link_hash_defweak)
13477 && (IS_PPC64_TLS_RELOC (r_type)
13478 != (sym_type == STT_TLS
13479 || (sym_type == STT_SECTION
13480 && (sec->flags & SEC_THREAD_LOCAL) != 0))))
13481 {
13482 if (tls_mask != 0
13483 && (r_type == R_PPC64_TLS
13484 || r_type == R_PPC64_TLSGD
13485 || r_type == R_PPC64_TLSLD))
13486 /* R_PPC64_TLS is OK against a symbol in the TOC. */
13487 ;
13488 else
13489 info->callbacks->einfo
13490 (!IS_PPC64_TLS_RELOC (r_type)
13491 ? _("%P: %H: %s used with TLS symbol `%T'\n")
13492 : _("%P: %H: %s used with non-TLS symbol `%T'\n"),
13493 input_bfd, input_section, rel->r_offset,
13494 ppc64_elf_howto_table[r_type]->name,
13495 sym_name);
13496 }
13497
13498 /* Ensure reloc mapping code below stays sane. */
13499 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
13500 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
13501 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
13502 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
13503 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
13504 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
13505 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
13506 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
13507 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
13508 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
13509 abort ();
13510
13511 switch (r_type)
13512 {
13513 default:
13514 break;
13515
13516 case R_PPC64_LO_DS_OPT:
13517 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
13518 if ((insn & (0x3f << 26)) != 58u << 26)
13519 abort ();
13520 insn += (14u << 26) - (58u << 26);
13521 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
13522 r_type = R_PPC64_TOC16_LO;
13523 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13524 break;
13525
13526 case R_PPC64_TOC16:
13527 case R_PPC64_TOC16_LO:
13528 case R_PPC64_TOC16_DS:
13529 case R_PPC64_TOC16_LO_DS:
13530 {
13531 /* Check for toc tls entries. */
13532 unsigned char *toc_tls;
13533 int retval;
13534
13535 retval = get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
13536 &local_syms, rel, input_bfd);
13537 if (retval == 0)
13538 return FALSE;
13539
13540 if (toc_tls)
13541 {
13542 tls_mask = *toc_tls;
13543 if (r_type == R_PPC64_TOC16_DS
13544 || r_type == R_PPC64_TOC16_LO_DS)
13545 {
13546 if (tls_mask != 0
13547 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
13548 goto toctprel;
13549 }
13550 else
13551 {
13552 /* If we found a GD reloc pair, then we might be
13553 doing a GD->IE transition. */
13554 if (retval == 2)
13555 {
13556 tls_gd = TLS_TPRELGD;
13557 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13558 goto tls_ldgd_opt;
13559 }
13560 else if (retval == 3)
13561 {
13562 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13563 goto tls_ldgd_opt;
13564 }
13565 }
13566 }
13567 }
13568 break;
13569
13570 case R_PPC64_GOT_TPREL16_HI:
13571 case R_PPC64_GOT_TPREL16_HA:
13572 if (tls_mask != 0
13573 && (tls_mask & TLS_TPREL) == 0)
13574 {
13575 rel->r_offset -= d_offset;
13576 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
13577 r_type = R_PPC64_NONE;
13578 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13579 }
13580 break;
13581
13582 case R_PPC64_GOT_TPREL16_DS:
13583 case R_PPC64_GOT_TPREL16_LO_DS:
13584 if (tls_mask != 0
13585 && (tls_mask & TLS_TPREL) == 0)
13586 {
13587 toctprel:
13588 insn = bfd_get_32 (output_bfd,
13589 contents + rel->r_offset - d_offset);
13590 insn &= 31 << 21;
13591 insn |= 0x3c0d0000; /* addis 0,13,0 */
13592 bfd_put_32 (output_bfd, insn,
13593 contents + rel->r_offset - d_offset);
13594 r_type = R_PPC64_TPREL16_HA;
13595 if (toc_symndx != 0)
13596 {
13597 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
13598 rel->r_addend = toc_addend;
13599 /* We changed the symbol. Start over in order to
13600 get h, sym, sec etc. right. */
13601 goto again;
13602 }
13603 else
13604 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13605 }
13606 break;
13607
13608 case R_PPC64_TLS:
13609 if (tls_mask != 0
13610 && (tls_mask & TLS_TPREL) == 0)
13611 {
13612 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
13613 insn = _bfd_elf_ppc_at_tls_transform (insn, 13);
13614 if (insn == 0)
13615 abort ();
13616 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
13617 /* Was PPC64_TLS which sits on insn boundary, now
13618 PPC64_TPREL16_LO which is at low-order half-word. */
13619 rel->r_offset += d_offset;
13620 r_type = R_PPC64_TPREL16_LO;
13621 if (toc_symndx != 0)
13622 {
13623 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
13624 rel->r_addend = toc_addend;
13625 /* We changed the symbol. Start over in order to
13626 get h, sym, sec etc. right. */
13627 goto again;
13628 }
13629 else
13630 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13631 }
13632 break;
13633
13634 case R_PPC64_GOT_TLSGD16_HI:
13635 case R_PPC64_GOT_TLSGD16_HA:
13636 tls_gd = TLS_TPRELGD;
13637 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13638 goto tls_gdld_hi;
13639 break;
13640
13641 case R_PPC64_GOT_TLSLD16_HI:
13642 case R_PPC64_GOT_TLSLD16_HA:
13643 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13644 {
13645 tls_gdld_hi:
13646 if ((tls_mask & tls_gd) != 0)
13647 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
13648 + R_PPC64_GOT_TPREL16_DS);
13649 else
13650 {
13651 rel->r_offset -= d_offset;
13652 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
13653 r_type = R_PPC64_NONE;
13654 }
13655 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13656 }
13657 break;
13658
13659 case R_PPC64_GOT_TLSGD16:
13660 case R_PPC64_GOT_TLSGD16_LO:
13661 tls_gd = TLS_TPRELGD;
13662 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13663 goto tls_ldgd_opt;
13664 break;
13665
13666 case R_PPC64_GOT_TLSLD16:
13667 case R_PPC64_GOT_TLSLD16_LO:
13668 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13669 {
13670 unsigned int insn1, insn2, insn3;
13671 bfd_vma offset;
13672
13673 tls_ldgd_opt:
13674 offset = (bfd_vma) -1;
13675 /* If not using the newer R_PPC64_TLSGD/LD to mark
13676 __tls_get_addr calls, we must trust that the call
13677 stays with its arg setup insns, ie. that the next
13678 reloc is the __tls_get_addr call associated with
13679 the current reloc. Edit both insns. */
13680 if (input_section->has_tls_get_addr_call
13681 && rel + 1 < relend
13682 && branch_reloc_hash_match (input_bfd, rel + 1,
13683 htab->tls_get_addr,
13684 htab->tls_get_addr_fd))
13685 offset = rel[1].r_offset;
13686 /* We read the low GOT_TLS (or TOC16) insn because we
13687 need to keep the destination reg. It may be
13688 something other than the usual r3, and moved to r3
13689 before the call by intervening code. */
13690 insn1 = bfd_get_32 (output_bfd,
13691 contents + rel->r_offset - d_offset);
13692 if ((tls_mask & tls_gd) != 0)
13693 {
13694 /* IE */
13695 insn1 &= (0x1f << 21) | (0x1f << 16);
13696 insn1 |= 58 << 26; /* ld */
13697 insn2 = 0x7c636a14; /* add 3,3,13 */
13698 if (offset != (bfd_vma) -1)
13699 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13700 if ((tls_mask & TLS_EXPLICIT) == 0)
13701 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
13702 + R_PPC64_GOT_TPREL16_DS);
13703 else
13704 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
13705 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13706 }
13707 else
13708 {
13709 /* LE */
13710 insn1 &= 0x1f << 21;
13711 insn1 |= 0x3c0d0000; /* addis r,13,0 */
13712 insn2 = 0x38630000; /* addi 3,3,0 */
13713 if (tls_gd == 0)
13714 {
13715 /* Was an LD reloc. */
13716 if (toc_symndx)
13717 sec = local_sections[toc_symndx];
13718 for (r_symndx = 0;
13719 r_symndx < symtab_hdr->sh_info;
13720 r_symndx++)
13721 if (local_sections[r_symndx] == sec)
13722 break;
13723 if (r_symndx >= symtab_hdr->sh_info)
13724 r_symndx = STN_UNDEF;
13725 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
13726 if (r_symndx != STN_UNDEF)
13727 rel->r_addend -= (local_syms[r_symndx].st_value
13728 + sec->output_offset
13729 + sec->output_section->vma);
13730 }
13731 else if (toc_symndx != 0)
13732 {
13733 r_symndx = toc_symndx;
13734 rel->r_addend = toc_addend;
13735 }
13736 r_type = R_PPC64_TPREL16_HA;
13737 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13738 if (offset != (bfd_vma) -1)
13739 {
13740 rel[1].r_info = ELF64_R_INFO (r_symndx,
13741 R_PPC64_TPREL16_LO);
13742 rel[1].r_offset = offset + d_offset;
13743 rel[1].r_addend = rel->r_addend;
13744 }
13745 }
13746 bfd_put_32 (output_bfd, insn1,
13747 contents + rel->r_offset - d_offset);
13748 if (offset != (bfd_vma) -1)
13749 {
13750 insn3 = bfd_get_32 (output_bfd,
13751 contents + offset + 4);
13752 if (insn3 == NOP
13753 || insn3 == CROR_151515 || insn3 == CROR_313131)
13754 {
13755 rel[1].r_offset += 4;
13756 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
13757 insn2 = NOP;
13758 }
13759 bfd_put_32 (output_bfd, insn2, contents + offset);
13760 }
13761 if ((tls_mask & tls_gd) == 0
13762 && (tls_gd == 0 || toc_symndx != 0))
13763 {
13764 /* We changed the symbol. Start over in order
13765 to get h, sym, sec etc. right. */
13766 goto again;
13767 }
13768 }
13769 break;
13770
13771 case R_PPC64_TLSGD:
13772 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13773 {
13774 unsigned int insn2, insn3;
13775 bfd_vma offset = rel->r_offset;
13776
13777 if ((tls_mask & TLS_TPRELGD) != 0)
13778 {
13779 /* IE */
13780 r_type = R_PPC64_NONE;
13781 insn2 = 0x7c636a14; /* add 3,3,13 */
13782 }
13783 else
13784 {
13785 /* LE */
13786 if (toc_symndx != 0)
13787 {
13788 r_symndx = toc_symndx;
13789 rel->r_addend = toc_addend;
13790 }
13791 r_type = R_PPC64_TPREL16_LO;
13792 rel->r_offset = offset + d_offset;
13793 insn2 = 0x38630000; /* addi 3,3,0 */
13794 }
13795 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13796 /* Zap the reloc on the _tls_get_addr call too. */
13797 BFD_ASSERT (offset == rel[1].r_offset);
13798 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13799 insn3 = bfd_get_32 (output_bfd,
13800 contents + offset + 4);
13801 if (insn3 == NOP
13802 || insn3 == CROR_151515 || insn3 == CROR_313131)
13803 {
13804 rel->r_offset += 4;
13805 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
13806 insn2 = NOP;
13807 }
13808 bfd_put_32 (output_bfd, insn2, contents + offset);
13809 if ((tls_mask & TLS_TPRELGD) == 0 && toc_symndx != 0)
13810 goto again;
13811 }
13812 break;
13813
13814 case R_PPC64_TLSLD:
13815 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13816 {
13817 unsigned int insn2, insn3;
13818 bfd_vma offset = rel->r_offset;
13819
13820 if (toc_symndx)
13821 sec = local_sections[toc_symndx];
13822 for (r_symndx = 0;
13823 r_symndx < symtab_hdr->sh_info;
13824 r_symndx++)
13825 if (local_sections[r_symndx] == sec)
13826 break;
13827 if (r_symndx >= symtab_hdr->sh_info)
13828 r_symndx = STN_UNDEF;
13829 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
13830 if (r_symndx != STN_UNDEF)
13831 rel->r_addend -= (local_syms[r_symndx].st_value
13832 + sec->output_offset
13833 + sec->output_section->vma);
13834
13835 r_type = R_PPC64_TPREL16_LO;
13836 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13837 rel->r_offset = offset + d_offset;
13838 /* Zap the reloc on the _tls_get_addr call too. */
13839 BFD_ASSERT (offset == rel[1].r_offset);
13840 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13841 insn2 = 0x38630000; /* addi 3,3,0 */
13842 insn3 = bfd_get_32 (output_bfd,
13843 contents + offset + 4);
13844 if (insn3 == NOP
13845 || insn3 == CROR_151515 || insn3 == CROR_313131)
13846 {
13847 rel->r_offset += 4;
13848 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
13849 insn2 = NOP;
13850 }
13851 bfd_put_32 (output_bfd, insn2, contents + offset);
13852 goto again;
13853 }
13854 break;
13855
13856 case R_PPC64_DTPMOD64:
13857 if (rel + 1 < relend
13858 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
13859 && rel[1].r_offset == rel->r_offset + 8)
13860 {
13861 if ((tls_mask & TLS_GD) == 0)
13862 {
13863 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
13864 if ((tls_mask & TLS_TPRELGD) != 0)
13865 r_type = R_PPC64_TPREL64;
13866 else
13867 {
13868 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
13869 r_type = R_PPC64_NONE;
13870 }
13871 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13872 }
13873 }
13874 else
13875 {
13876 if ((tls_mask & TLS_LD) == 0)
13877 {
13878 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
13879 r_type = R_PPC64_NONE;
13880 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13881 }
13882 }
13883 break;
13884
13885 case R_PPC64_TPREL64:
13886 if ((tls_mask & TLS_TPREL) == 0)
13887 {
13888 r_type = R_PPC64_NONE;
13889 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13890 }
13891 break;
13892
13893 case R_PPC64_ENTRY:
13894 relocation = TOCstart + htab->sec_info[input_section->id].toc_off;
13895 if (!bfd_link_pic (info)
13896 && !info->traditional_format
13897 && relocation + 0x80008000 <= 0xffffffff)
13898 {
13899 unsigned int insn1, insn2;
13900
13901 insn1 = bfd_get_32 (input_bfd, contents + rel->r_offset);
13902 insn2 = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
13903 if ((insn1 & ~0xfffc) == LD_R2_0R12
13904 && insn2 == ADD_R2_R2_R12)
13905 {
13906 bfd_put_32 (output_bfd,
13907 LIS_R2 + PPC_HA (relocation),
13908 contents + rel->r_offset);
13909 bfd_put_32 (output_bfd,
13910 ADDI_R2_R2 + PPC_LO (relocation),
13911 contents + rel->r_offset + 4);
13912 }
13913 }
13914 else
13915 {
13916 relocation -= (rel->r_offset
13917 + input_section->output_offset
13918 + input_section->output_section->vma);
13919 if (relocation + 0x80008000 <= 0xffffffff)
13920 {
13921 unsigned int insn1, insn2;
13922
13923 insn1 = bfd_get_32 (input_bfd, contents + rel->r_offset);
13924 insn2 = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
13925 if ((insn1 & ~0xfffc) == LD_R2_0R12
13926 && insn2 == ADD_R2_R2_R12)
13927 {
13928 bfd_put_32 (output_bfd,
13929 ADDIS_R2_R12 + PPC_HA (relocation),
13930 contents + rel->r_offset);
13931 bfd_put_32 (output_bfd,
13932 ADDI_R2_R2 + PPC_LO (relocation),
13933 contents + rel->r_offset + 4);
13934 }
13935 }
13936 }
13937 break;
13938
13939 case R_PPC64_REL16_HA:
13940 /* If we are generating a non-PIC executable, edit
13941 . 0: addis 2,12,.TOC.-0b@ha
13942 . addi 2,2,.TOC.-0b@l
13943 used by ELFv2 global entry points to set up r2, to
13944 . lis 2,.TOC.@ha
13945 . addi 2,2,.TOC.@l
13946 if .TOC. is in range. */
13947 if (!bfd_link_pic (info)
13948 && !info->traditional_format
13949 && !htab->opd_abi
13950 && rel->r_addend == d_offset
13951 && h != NULL && &h->elf == htab->elf.hgot
13952 && rel + 1 < relend
13953 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_REL16_LO)
13954 && rel[1].r_offset == rel->r_offset + 4
13955 && rel[1].r_addend == rel->r_addend + 4
13956 && relocation + 0x80008000 <= 0xffffffff)
13957 {
13958 unsigned int insn1, insn2;
13959 bfd_vma offset = rel->r_offset - d_offset;
13960 insn1 = bfd_get_32 (output_bfd, contents + offset);
13961 insn2 = bfd_get_32 (output_bfd, contents + offset + 4);
13962 if ((insn1 & 0xffff0000) == ADDIS_R2_R12
13963 && (insn2 & 0xffff0000) == ADDI_R2_R2)
13964 {
13965 r_type = R_PPC64_ADDR16_HA;
13966 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13967 rel->r_addend -= d_offset;
13968 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_ADDR16_LO);
13969 rel[1].r_addend -= d_offset + 4;
13970 bfd_put_32 (output_bfd, LIS_R2, contents + offset);
13971 }
13972 }
13973 break;
13974 }
13975
13976 /* Handle other relocations that tweak non-addend part of insn. */
13977 insn = 0;
13978 max_br_offset = 1 << 25;
13979 addend = rel->r_addend;
13980 reloc_dest = DEST_NORMAL;
13981 switch (r_type)
13982 {
13983 default:
13984 break;
13985
13986 case R_PPC64_TOCSAVE:
13987 if (relocation + addend == (rel->r_offset
13988 + input_section->output_offset
13989 + input_section->output_section->vma)
13990 && tocsave_find (htab, NO_INSERT,
13991 &local_syms, rel, input_bfd))
13992 {
13993 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
13994 if (insn == NOP
13995 || insn == CROR_151515 || insn == CROR_313131)
13996 bfd_put_32 (input_bfd,
13997 STD_R2_0R1 + STK_TOC (htab),
13998 contents + rel->r_offset);
13999 }
14000 break;
14001
14002 /* Branch taken prediction relocations. */
14003 case R_PPC64_ADDR14_BRTAKEN:
14004 case R_PPC64_REL14_BRTAKEN:
14005 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
14006 /* Fall thru. */
14007
14008 /* Branch not taken prediction relocations. */
14009 case R_PPC64_ADDR14_BRNTAKEN:
14010 case R_PPC64_REL14_BRNTAKEN:
14011 insn |= bfd_get_32 (output_bfd,
14012 contents + rel->r_offset) & ~(0x01 << 21);
14013 /* Fall thru. */
14014
14015 case R_PPC64_REL14:
14016 max_br_offset = 1 << 15;
14017 /* Fall thru. */
14018
14019 case R_PPC64_REL24:
14020 /* Calls to functions with a different TOC, such as calls to
14021 shared objects, need to alter the TOC pointer. This is
14022 done using a linkage stub. A REL24 branching to these
14023 linkage stubs needs to be followed by a nop, as the nop
14024 will be replaced with an instruction to restore the TOC
14025 base pointer. */
14026 fdh = h;
14027 if (h != NULL
14028 && h->oh != NULL
14029 && h->oh->is_func_descriptor)
14030 fdh = ppc_follow_link (h->oh);
14031 stub_entry = ppc_get_stub_entry (input_section, sec, fdh, &orig_rel,
14032 htab);
14033 if (stub_entry != NULL
14034 && (stub_entry->stub_type == ppc_stub_plt_call
14035 || stub_entry->stub_type == ppc_stub_plt_call_r2save
14036 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
14037 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
14038 {
14039 bfd_boolean can_plt_call = FALSE;
14040
14041 /* All of these stubs will modify r2, so there must be a
14042 branch and link followed by a nop. The nop is
14043 replaced by an insn to restore r2. */
14044 if (rel->r_offset + 8 <= input_section->size)
14045 {
14046 unsigned long br;
14047
14048 br = bfd_get_32 (input_bfd,
14049 contents + rel->r_offset);
14050 if ((br & 1) != 0)
14051 {
14052 unsigned long nop;
14053
14054 nop = bfd_get_32 (input_bfd,
14055 contents + rel->r_offset + 4);
14056 if (nop == NOP
14057 || nop == CROR_151515 || nop == CROR_313131)
14058 {
14059 if (h != NULL
14060 && (h == htab->tls_get_addr_fd
14061 || h == htab->tls_get_addr)
14062 && htab->params->tls_get_addr_opt)
14063 {
14064 /* Special stub used, leave nop alone. */
14065 }
14066 else
14067 bfd_put_32 (input_bfd,
14068 LD_R2_0R1 + STK_TOC (htab),
14069 contents + rel->r_offset + 4);
14070 can_plt_call = TRUE;
14071 }
14072 }
14073 }
14074
14075 if (!can_plt_call && h != NULL)
14076 {
14077 const char *name = h->elf.root.root.string;
14078
14079 if (*name == '.')
14080 ++name;
14081
14082 if (strncmp (name, "__libc_start_main", 17) == 0
14083 && (name[17] == 0 || name[17] == '@'))
14084 {
14085 /* Allow crt1 branch to go via a toc adjusting
14086 stub. Other calls that never return could do
14087 the same, if we could detect such. */
14088 can_plt_call = TRUE;
14089 }
14090 }
14091
14092 if (!can_plt_call)
14093 {
14094 /* g++ as of 20130507 emits self-calls without a
14095 following nop. This is arguably wrong since we
14096 have conflicting information. On the one hand a
14097 global symbol and on the other a local call
14098 sequence, but don't error for this special case.
14099 It isn't possible to cheaply verify we have
14100 exactly such a call. Allow all calls to the same
14101 section. */
14102 asection *code_sec = sec;
14103
14104 if (get_opd_info (sec) != NULL)
14105 {
14106 bfd_vma off = (relocation + addend
14107 - sec->output_section->vma
14108 - sec->output_offset);
14109
14110 opd_entry_value (sec, off, &code_sec, NULL, FALSE);
14111 }
14112 if (code_sec == input_section)
14113 can_plt_call = TRUE;
14114 }
14115
14116 if (!can_plt_call)
14117 {
14118 if (stub_entry->stub_type == ppc_stub_plt_call
14119 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14120 info->callbacks->einfo
14121 (_("%P: %H: call to `%T' lacks nop, can't restore toc; "
14122 "recompile with -fPIC\n"),
14123 input_bfd, input_section, rel->r_offset, sym_name);
14124 else
14125 info->callbacks->einfo
14126 (_("%P: %H: call to `%T' lacks nop, can't restore toc; "
14127 "(-mcmodel=small toc adjust stub)\n"),
14128 input_bfd, input_section, rel->r_offset, sym_name);
14129
14130 bfd_set_error (bfd_error_bad_value);
14131 ret = FALSE;
14132 }
14133
14134 if (can_plt_call
14135 && (stub_entry->stub_type == ppc_stub_plt_call
14136 || stub_entry->stub_type == ppc_stub_plt_call_r2save))
14137 unresolved_reloc = FALSE;
14138 }
14139
14140 if ((stub_entry == NULL
14141 || stub_entry->stub_type == ppc_stub_long_branch
14142 || stub_entry->stub_type == ppc_stub_plt_branch)
14143 && get_opd_info (sec) != NULL)
14144 {
14145 /* The branch destination is the value of the opd entry. */
14146 bfd_vma off = (relocation + addend
14147 - sec->output_section->vma
14148 - sec->output_offset);
14149 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL, FALSE);
14150 if (dest != (bfd_vma) -1)
14151 {
14152 relocation = dest;
14153 addend = 0;
14154 reloc_dest = DEST_OPD;
14155 }
14156 }
14157
14158 /* If the branch is out of reach we ought to have a long
14159 branch stub. */
14160 from = (rel->r_offset
14161 + input_section->output_offset
14162 + input_section->output_section->vma);
14163
14164 relocation += PPC64_LOCAL_ENTRY_OFFSET (fdh
14165 ? fdh->elf.other
14166 : sym->st_other);
14167
14168 if (stub_entry != NULL
14169 && (stub_entry->stub_type == ppc_stub_long_branch
14170 || stub_entry->stub_type == ppc_stub_plt_branch)
14171 && (r_type == R_PPC64_ADDR14_BRTAKEN
14172 || r_type == R_PPC64_ADDR14_BRNTAKEN
14173 || (relocation + addend - from + max_br_offset
14174 < 2 * max_br_offset)))
14175 /* Don't use the stub if this branch is in range. */
14176 stub_entry = NULL;
14177
14178 if (stub_entry != NULL)
14179 {
14180 /* Munge up the value and addend so that we call the stub
14181 rather than the procedure directly. */
14182 asection *stub_sec = stub_entry->group->stub_sec;
14183
14184 if (stub_entry->stub_type == ppc_stub_save_res)
14185 relocation += (stub_sec->output_offset
14186 + stub_sec->output_section->vma
14187 + stub_sec->size - htab->sfpr->size
14188 - htab->sfpr->output_offset
14189 - htab->sfpr->output_section->vma);
14190 else
14191 relocation = (stub_entry->stub_offset
14192 + stub_sec->output_offset
14193 + stub_sec->output_section->vma);
14194 addend = 0;
14195 reloc_dest = DEST_STUB;
14196
14197 if ((stub_entry->stub_type == ppc_stub_plt_call
14198 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14199 && (ALWAYS_EMIT_R2SAVE
14200 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14201 && rel + 1 < relend
14202 && rel[1].r_offset == rel->r_offset + 4
14203 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOCSAVE)
14204 relocation += 4;
14205 }
14206
14207 if (insn != 0)
14208 {
14209 if (is_isa_v2)
14210 {
14211 /* Set 'a' bit. This is 0b00010 in BO field for branch
14212 on CR(BI) insns (BO == 001at or 011at), and 0b01000
14213 for branch on CTR insns (BO == 1a00t or 1a01t). */
14214 if ((insn & (0x14 << 21)) == (0x04 << 21))
14215 insn |= 0x02 << 21;
14216 else if ((insn & (0x14 << 21)) == (0x10 << 21))
14217 insn |= 0x08 << 21;
14218 else
14219 break;
14220 }
14221 else
14222 {
14223 /* Invert 'y' bit if not the default. */
14224 if ((bfd_signed_vma) (relocation + addend - from) < 0)
14225 insn ^= 0x01 << 21;
14226 }
14227
14228 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
14229 }
14230
14231 /* NOP out calls to undefined weak functions.
14232 We can thus call a weak function without first
14233 checking whether the function is defined. */
14234 else if (h != NULL
14235 && h->elf.root.type == bfd_link_hash_undefweak
14236 && h->elf.dynindx == -1
14237 && r_type == R_PPC64_REL24
14238 && relocation == 0
14239 && addend == 0)
14240 {
14241 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
14242 goto copy_reloc;
14243 }
14244 break;
14245 }
14246
14247 /* Set `addend'. */
14248 tls_type = 0;
14249 switch (r_type)
14250 {
14251 default:
14252 info->callbacks->einfo
14253 (_("%P: %B: unknown relocation type %d for `%T'\n"),
14254 input_bfd, (int) r_type, sym_name);
14255
14256 bfd_set_error (bfd_error_bad_value);
14257 ret = FALSE;
14258 goto copy_reloc;
14259
14260 case R_PPC64_NONE:
14261 case R_PPC64_TLS:
14262 case R_PPC64_TLSGD:
14263 case R_PPC64_TLSLD:
14264 case R_PPC64_TOCSAVE:
14265 case R_PPC64_GNU_VTINHERIT:
14266 case R_PPC64_GNU_VTENTRY:
14267 case R_PPC64_ENTRY:
14268 goto copy_reloc;
14269
14270 /* GOT16 relocations. Like an ADDR16 using the symbol's
14271 address in the GOT as relocation value instead of the
14272 symbol's value itself. Also, create a GOT entry for the
14273 symbol and put the symbol value there. */
14274 case R_PPC64_GOT_TLSGD16:
14275 case R_PPC64_GOT_TLSGD16_LO:
14276 case R_PPC64_GOT_TLSGD16_HI:
14277 case R_PPC64_GOT_TLSGD16_HA:
14278 tls_type = TLS_TLS | TLS_GD;
14279 goto dogot;
14280
14281 case R_PPC64_GOT_TLSLD16:
14282 case R_PPC64_GOT_TLSLD16_LO:
14283 case R_PPC64_GOT_TLSLD16_HI:
14284 case R_PPC64_GOT_TLSLD16_HA:
14285 tls_type = TLS_TLS | TLS_LD;
14286 goto dogot;
14287
14288 case R_PPC64_GOT_TPREL16_DS:
14289 case R_PPC64_GOT_TPREL16_LO_DS:
14290 case R_PPC64_GOT_TPREL16_HI:
14291 case R_PPC64_GOT_TPREL16_HA:
14292 tls_type = TLS_TLS | TLS_TPREL;
14293 goto dogot;
14294
14295 case R_PPC64_GOT_DTPREL16_DS:
14296 case R_PPC64_GOT_DTPREL16_LO_DS:
14297 case R_PPC64_GOT_DTPREL16_HI:
14298 case R_PPC64_GOT_DTPREL16_HA:
14299 tls_type = TLS_TLS | TLS_DTPREL;
14300 goto dogot;
14301
14302 case R_PPC64_GOT16:
14303 case R_PPC64_GOT16_LO:
14304 case R_PPC64_GOT16_HI:
14305 case R_PPC64_GOT16_HA:
14306 case R_PPC64_GOT16_DS:
14307 case R_PPC64_GOT16_LO_DS:
14308 dogot:
14309 {
14310 /* Relocation is to the entry for this symbol in the global
14311 offset table. */
14312 asection *got;
14313 bfd_vma *offp;
14314 bfd_vma off;
14315 unsigned long indx = 0;
14316 struct got_entry *ent;
14317
14318 if (tls_type == (TLS_TLS | TLS_LD)
14319 && (h == NULL
14320 || !h->elf.def_dynamic))
14321 ent = ppc64_tlsld_got (input_bfd);
14322 else
14323 {
14324
14325 if (h != NULL)
14326 {
14327 bfd_boolean dyn = htab->elf.dynamic_sections_created;
14328 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, bfd_link_pic (info),
14329 &h->elf)
14330 || (bfd_link_pic (info)
14331 && SYMBOL_REFERENCES_LOCAL (info, &h->elf)))
14332 /* This is actually a static link, or it is a
14333 -Bsymbolic link and the symbol is defined
14334 locally, or the symbol was forced to be local
14335 because of a version file. */
14336 ;
14337 else
14338 {
14339 BFD_ASSERT (h->elf.dynindx != -1);
14340 indx = h->elf.dynindx;
14341 unresolved_reloc = FALSE;
14342 }
14343 ent = h->elf.got.glist;
14344 }
14345 else
14346 {
14347 if (local_got_ents == NULL)
14348 abort ();
14349 ent = local_got_ents[r_symndx];
14350 }
14351
14352 for (; ent != NULL; ent = ent->next)
14353 if (ent->addend == orig_rel.r_addend
14354 && ent->owner == input_bfd
14355 && ent->tls_type == tls_type)
14356 break;
14357 }
14358
14359 if (ent == NULL)
14360 abort ();
14361 if (ent->is_indirect)
14362 ent = ent->got.ent;
14363 offp = &ent->got.offset;
14364 got = ppc64_elf_tdata (ent->owner)->got;
14365 if (got == NULL)
14366 abort ();
14367
14368 /* The offset must always be a multiple of 8. We use the
14369 least significant bit to record whether we have already
14370 processed this entry. */
14371 off = *offp;
14372 if ((off & 1) != 0)
14373 off &= ~1;
14374 else
14375 {
14376 /* Generate relocs for the dynamic linker, except in
14377 the case of TLSLD where we'll use one entry per
14378 module. */
14379 asection *relgot;
14380 bfd_boolean ifunc;
14381
14382 *offp = off | 1;
14383 relgot = NULL;
14384 ifunc = (h != NULL
14385 ? h->elf.type == STT_GNU_IFUNC
14386 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC);
14387 if (ifunc)
14388 relgot = htab->elf.irelplt;
14389 else if ((bfd_link_pic (info) || indx != 0)
14390 && (h == NULL
14391 || (tls_type == (TLS_TLS | TLS_LD)
14392 && !h->elf.def_dynamic)
14393 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
14394 || h->elf.root.type != bfd_link_hash_undefweak))
14395 relgot = ppc64_elf_tdata (ent->owner)->relgot;
14396 if (relgot != NULL)
14397 {
14398 outrel.r_offset = (got->output_section->vma
14399 + got->output_offset
14400 + off);
14401 outrel.r_addend = addend;
14402 if (tls_type & (TLS_LD | TLS_GD))
14403 {
14404 outrel.r_addend = 0;
14405 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
14406 if (tls_type == (TLS_TLS | TLS_GD))
14407 {
14408 loc = relgot->contents;
14409 loc += (relgot->reloc_count++
14410 * sizeof (Elf64_External_Rela));
14411 bfd_elf64_swap_reloca_out (output_bfd,
14412 &outrel, loc);
14413 outrel.r_offset += 8;
14414 outrel.r_addend = addend;
14415 outrel.r_info
14416 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
14417 }
14418 }
14419 else if (tls_type == (TLS_TLS | TLS_DTPREL))
14420 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
14421 else if (tls_type == (TLS_TLS | TLS_TPREL))
14422 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
14423 else if (indx != 0)
14424 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
14425 else
14426 {
14427 if (ifunc)
14428 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
14429 else
14430 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
14431
14432 /* Write the .got section contents for the sake
14433 of prelink. */
14434 loc = got->contents + off;
14435 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
14436 loc);
14437 }
14438
14439 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
14440 {
14441 outrel.r_addend += relocation;
14442 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
14443 {
14444 if (htab->elf.tls_sec == NULL)
14445 outrel.r_addend = 0;
14446 else
14447 outrel.r_addend -= htab->elf.tls_sec->vma;
14448 }
14449 }
14450 loc = relgot->contents;
14451 loc += (relgot->reloc_count++
14452 * sizeof (Elf64_External_Rela));
14453 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
14454 }
14455
14456 /* Init the .got section contents here if we're not
14457 emitting a reloc. */
14458 else
14459 {
14460 relocation += addend;
14461 if (tls_type == (TLS_TLS | TLS_LD))
14462 relocation = 1;
14463 else if (tls_type != 0)
14464 {
14465 if (htab->elf.tls_sec == NULL)
14466 relocation = 0;
14467 else
14468 {
14469 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
14470 if (tls_type == (TLS_TLS | TLS_TPREL))
14471 relocation += DTP_OFFSET - TP_OFFSET;
14472 }
14473
14474 if (tls_type == (TLS_TLS | TLS_GD))
14475 {
14476 bfd_put_64 (output_bfd, relocation,
14477 got->contents + off + 8);
14478 relocation = 1;
14479 }
14480 }
14481
14482 bfd_put_64 (output_bfd, relocation,
14483 got->contents + off);
14484 }
14485 }
14486
14487 if (off >= (bfd_vma) -2)
14488 abort ();
14489
14490 relocation = got->output_section->vma + got->output_offset + off;
14491 addend = -(TOCstart + htab->sec_info[input_section->id].toc_off);
14492 }
14493 break;
14494
14495 case R_PPC64_PLT16_HA:
14496 case R_PPC64_PLT16_HI:
14497 case R_PPC64_PLT16_LO:
14498 case R_PPC64_PLT32:
14499 case R_PPC64_PLT64:
14500 /* Relocation is to the entry for this symbol in the
14501 procedure linkage table. */
14502 {
14503 struct plt_entry **plt_list = NULL;
14504 if (h != NULL)
14505 plt_list = &h->elf.plt.plist;
14506 else if (local_got_ents != NULL)
14507 {
14508 struct plt_entry **local_plt = (struct plt_entry **)
14509 (local_got_ents + symtab_hdr->sh_info);
14510 unsigned char *local_got_tls_masks = (unsigned char *)
14511 (local_plt + symtab_hdr->sh_info);
14512 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
14513 plt_list = local_plt + r_symndx;
14514 }
14515 if (plt_list)
14516 {
14517 struct plt_entry *ent;
14518
14519 for (ent = *plt_list; ent != NULL; ent = ent->next)
14520 if (ent->plt.offset != (bfd_vma) -1
14521 && ent->addend == orig_rel.r_addend)
14522 {
14523 asection *plt;
14524
14525 plt = htab->elf.splt;
14526 if (!htab->elf.dynamic_sections_created
14527 || h == NULL
14528 || h->elf.dynindx == -1)
14529 plt = htab->elf.iplt;
14530 relocation = (plt->output_section->vma
14531 + plt->output_offset
14532 + ent->plt.offset);
14533 addend = 0;
14534 unresolved_reloc = FALSE;
14535 break;
14536 }
14537 }
14538 }
14539 break;
14540
14541 case R_PPC64_TOC:
14542 /* Relocation value is TOC base. */
14543 relocation = TOCstart;
14544 if (r_symndx == STN_UNDEF)
14545 relocation += htab->sec_info[input_section->id].toc_off;
14546 else if (unresolved_reloc)
14547 ;
14548 else if (sec != NULL && sec->id < htab->sec_info_arr_size)
14549 relocation += htab->sec_info[sec->id].toc_off;
14550 else
14551 unresolved_reloc = TRUE;
14552 goto dodyn;
14553
14554 /* TOC16 relocs. We want the offset relative to the TOC base,
14555 which is the address of the start of the TOC plus 0x8000.
14556 The TOC consists of sections .got, .toc, .tocbss, and .plt,
14557 in this order. */
14558 case R_PPC64_TOC16:
14559 case R_PPC64_TOC16_LO:
14560 case R_PPC64_TOC16_HI:
14561 case R_PPC64_TOC16_DS:
14562 case R_PPC64_TOC16_LO_DS:
14563 case R_PPC64_TOC16_HA:
14564 addend -= TOCstart + htab->sec_info[input_section->id].toc_off;
14565 break;
14566
14567 /* Relocate against the beginning of the section. */
14568 case R_PPC64_SECTOFF:
14569 case R_PPC64_SECTOFF_LO:
14570 case R_PPC64_SECTOFF_HI:
14571 case R_PPC64_SECTOFF_DS:
14572 case R_PPC64_SECTOFF_LO_DS:
14573 case R_PPC64_SECTOFF_HA:
14574 if (sec != NULL)
14575 addend -= sec->output_section->vma;
14576 break;
14577
14578 case R_PPC64_REL16:
14579 case R_PPC64_REL16_LO:
14580 case R_PPC64_REL16_HI:
14581 case R_PPC64_REL16_HA:
14582 case R_PPC64_REL16DX_HA:
14583 break;
14584
14585 case R_PPC64_REL14:
14586 case R_PPC64_REL14_BRNTAKEN:
14587 case R_PPC64_REL14_BRTAKEN:
14588 case R_PPC64_REL24:
14589 break;
14590
14591 case R_PPC64_TPREL16:
14592 case R_PPC64_TPREL16_LO:
14593 case R_PPC64_TPREL16_HI:
14594 case R_PPC64_TPREL16_HA:
14595 case R_PPC64_TPREL16_DS:
14596 case R_PPC64_TPREL16_LO_DS:
14597 case R_PPC64_TPREL16_HIGH:
14598 case R_PPC64_TPREL16_HIGHA:
14599 case R_PPC64_TPREL16_HIGHER:
14600 case R_PPC64_TPREL16_HIGHERA:
14601 case R_PPC64_TPREL16_HIGHEST:
14602 case R_PPC64_TPREL16_HIGHESTA:
14603 if (h != NULL
14604 && h->elf.root.type == bfd_link_hash_undefweak
14605 && h->elf.dynindx == -1)
14606 {
14607 /* Make this relocation against an undefined weak symbol
14608 resolve to zero. This is really just a tweak, since
14609 code using weak externs ought to check that they are
14610 defined before using them. */
14611 bfd_byte *p = contents + rel->r_offset - d_offset;
14612
14613 insn = bfd_get_32 (output_bfd, p);
14614 insn = _bfd_elf_ppc_at_tprel_transform (insn, 13);
14615 if (insn != 0)
14616 bfd_put_32 (output_bfd, insn, p);
14617 break;
14618 }
14619 if (htab->elf.tls_sec != NULL)
14620 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
14621 if (bfd_link_pic (info))
14622 /* The TPREL16 relocs shouldn't really be used in shared
14623 libs as they will result in DT_TEXTREL being set, but
14624 support them anyway. */
14625 goto dodyn;
14626 break;
14627
14628 case R_PPC64_DTPREL16:
14629 case R_PPC64_DTPREL16_LO:
14630 case R_PPC64_DTPREL16_HI:
14631 case R_PPC64_DTPREL16_HA:
14632 case R_PPC64_DTPREL16_DS:
14633 case R_PPC64_DTPREL16_LO_DS:
14634 case R_PPC64_DTPREL16_HIGH:
14635 case R_PPC64_DTPREL16_HIGHA:
14636 case R_PPC64_DTPREL16_HIGHER:
14637 case R_PPC64_DTPREL16_HIGHERA:
14638 case R_PPC64_DTPREL16_HIGHEST:
14639 case R_PPC64_DTPREL16_HIGHESTA:
14640 if (htab->elf.tls_sec != NULL)
14641 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
14642 break;
14643
14644 case R_PPC64_ADDR64_LOCAL:
14645 addend += PPC64_LOCAL_ENTRY_OFFSET (h != NULL
14646 ? h->elf.other
14647 : sym->st_other);
14648 break;
14649
14650 case R_PPC64_DTPMOD64:
14651 relocation = 1;
14652 addend = 0;
14653 goto dodyn;
14654
14655 case R_PPC64_TPREL64:
14656 if (htab->elf.tls_sec != NULL)
14657 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
14658 goto dodyn;
14659
14660 case R_PPC64_DTPREL64:
14661 if (htab->elf.tls_sec != NULL)
14662 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
14663 /* Fall thru */
14664
14665 /* Relocations that may need to be propagated if this is a
14666 dynamic object. */
14667 case R_PPC64_REL30:
14668 case R_PPC64_REL32:
14669 case R_PPC64_REL64:
14670 case R_PPC64_ADDR14:
14671 case R_PPC64_ADDR14_BRNTAKEN:
14672 case R_PPC64_ADDR14_BRTAKEN:
14673 case R_PPC64_ADDR16:
14674 case R_PPC64_ADDR16_DS:
14675 case R_PPC64_ADDR16_HA:
14676 case R_PPC64_ADDR16_HI:
14677 case R_PPC64_ADDR16_HIGH:
14678 case R_PPC64_ADDR16_HIGHA:
14679 case R_PPC64_ADDR16_HIGHER:
14680 case R_PPC64_ADDR16_HIGHERA:
14681 case R_PPC64_ADDR16_HIGHEST:
14682 case R_PPC64_ADDR16_HIGHESTA:
14683 case R_PPC64_ADDR16_LO:
14684 case R_PPC64_ADDR16_LO_DS:
14685 case R_PPC64_ADDR24:
14686 case R_PPC64_ADDR32:
14687 case R_PPC64_ADDR64:
14688 case R_PPC64_UADDR16:
14689 case R_PPC64_UADDR32:
14690 case R_PPC64_UADDR64:
14691 dodyn:
14692 if ((input_section->flags & SEC_ALLOC) == 0)
14693 break;
14694
14695 if (NO_OPD_RELOCS && is_opd)
14696 break;
14697
14698 if (bfd_link_pic (info)
14699 ? ((h == NULL
14700 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
14701 || h->elf.root.type != bfd_link_hash_undefweak)
14702 && (must_be_dyn_reloc (info, r_type)
14703 || !SYMBOL_CALLS_LOCAL (info, &h->elf)))
14704 : (h == NULL
14705 ? ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC
14706 : (h->elf.type == STT_GNU_IFUNC
14707 ? (abiversion (output_bfd) >= 2
14708 ? !(h->elf.pointer_equality_needed
14709 && !h->elf.def_regular
14710 && h->elf.root.type == bfd_link_hash_defined
14711 && h->elf.root.u.def.section == htab->glink)
14712 : !h->elf.needs_copy)
14713 : (ELIMINATE_COPY_RELOCS
14714 && !(h->elf.non_got_ref
14715 || h->elf.def_regular
14716 || h->elf.dynindx == -1)))))
14717 {
14718 bfd_boolean skip, relocate;
14719 asection *sreloc;
14720 bfd_vma out_off;
14721
14722 /* When generating a dynamic object, these relocations
14723 are copied into the output file to be resolved at run
14724 time. */
14725
14726 skip = FALSE;
14727 relocate = FALSE;
14728
14729 out_off = _bfd_elf_section_offset (output_bfd, info,
14730 input_section, rel->r_offset);
14731 if (out_off == (bfd_vma) -1)
14732 skip = TRUE;
14733 else if (out_off == (bfd_vma) -2)
14734 skip = TRUE, relocate = TRUE;
14735 out_off += (input_section->output_section->vma
14736 + input_section->output_offset);
14737 outrel.r_offset = out_off;
14738 outrel.r_addend = rel->r_addend;
14739
14740 /* Optimize unaligned reloc use. */
14741 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
14742 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
14743 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
14744 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
14745 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
14746 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
14747 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
14748 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
14749 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
14750
14751 if (skip)
14752 memset (&outrel, 0, sizeof outrel);
14753 else if (!SYMBOL_REFERENCES_LOCAL (info, &h->elf)
14754 && !is_opd
14755 && r_type != R_PPC64_TOC)
14756 {
14757 BFD_ASSERT (h->elf.dynindx != -1);
14758 outrel.r_info = ELF64_R_INFO (h->elf.dynindx, r_type);
14759 }
14760 else
14761 {
14762 /* This symbol is local, or marked to become local,
14763 or this is an opd section reloc which must point
14764 at a local function. */
14765 outrel.r_addend += relocation;
14766 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
14767 {
14768 if (is_opd && h != NULL)
14769 {
14770 /* Lie about opd entries. This case occurs
14771 when building shared libraries and we
14772 reference a function in another shared
14773 lib. The same thing happens for a weak
14774 definition in an application that's
14775 overridden by a strong definition in a
14776 shared lib. (I believe this is a generic
14777 bug in binutils handling of weak syms.)
14778 In these cases we won't use the opd
14779 entry in this lib. */
14780 unresolved_reloc = FALSE;
14781 }
14782 if (!is_opd
14783 && r_type == R_PPC64_ADDR64
14784 && (h != NULL
14785 ? h->elf.type == STT_GNU_IFUNC
14786 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
14787 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
14788 else
14789 {
14790 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
14791
14792 /* We need to relocate .opd contents for ld.so.
14793 Prelink also wants simple and consistent rules
14794 for relocs. This make all RELATIVE relocs have
14795 *r_offset equal to r_addend. */
14796 relocate = TRUE;
14797 }
14798 }
14799 else
14800 {
14801 long indx = 0;
14802
14803 if (h != NULL
14804 ? h->elf.type == STT_GNU_IFUNC
14805 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
14806 {
14807 info->callbacks->einfo
14808 (_("%P: %H: %s for indirect "
14809 "function `%T' unsupported\n"),
14810 input_bfd, input_section, rel->r_offset,
14811 ppc64_elf_howto_table[r_type]->name,
14812 sym_name);
14813 ret = FALSE;
14814 }
14815 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
14816 ;
14817 else if (sec == NULL || sec->owner == NULL)
14818 {
14819 bfd_set_error (bfd_error_bad_value);
14820 return FALSE;
14821 }
14822 else
14823 {
14824 asection *osec;
14825
14826 osec = sec->output_section;
14827 indx = elf_section_data (osec)->dynindx;
14828
14829 if (indx == 0)
14830 {
14831 if ((osec->flags & SEC_READONLY) == 0
14832 && htab->elf.data_index_section != NULL)
14833 osec = htab->elf.data_index_section;
14834 else
14835 osec = htab->elf.text_index_section;
14836 indx = elf_section_data (osec)->dynindx;
14837 }
14838 BFD_ASSERT (indx != 0);
14839
14840 /* We are turning this relocation into one
14841 against a section symbol, so subtract out
14842 the output section's address but not the
14843 offset of the input section in the output
14844 section. */
14845 outrel.r_addend -= osec->vma;
14846 }
14847
14848 outrel.r_info = ELF64_R_INFO (indx, r_type);
14849 }
14850 }
14851
14852 sreloc = elf_section_data (input_section)->sreloc;
14853 if (h != NULL
14854 ? h->elf.type == STT_GNU_IFUNC
14855 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
14856 sreloc = htab->elf.irelplt;
14857 if (sreloc == NULL)
14858 abort ();
14859
14860 if (sreloc->reloc_count * sizeof (Elf64_External_Rela)
14861 >= sreloc->size)
14862 abort ();
14863 loc = sreloc->contents;
14864 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
14865 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
14866
14867 /* If this reloc is against an external symbol, it will
14868 be computed at runtime, so there's no need to do
14869 anything now. However, for the sake of prelink ensure
14870 that the section contents are a known value. */
14871 if (! relocate)
14872 {
14873 unresolved_reloc = FALSE;
14874 /* The value chosen here is quite arbitrary as ld.so
14875 ignores section contents except for the special
14876 case of .opd where the contents might be accessed
14877 before relocation. Choose zero, as that won't
14878 cause reloc overflow. */
14879 relocation = 0;
14880 addend = 0;
14881 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
14882 to improve backward compatibility with older
14883 versions of ld. */
14884 if (r_type == R_PPC64_ADDR64)
14885 addend = outrel.r_addend;
14886 /* Adjust pc_relative relocs to have zero in *r_offset. */
14887 else if (ppc64_elf_howto_table[r_type]->pc_relative)
14888 addend = (input_section->output_section->vma
14889 + input_section->output_offset
14890 + rel->r_offset);
14891 }
14892 }
14893 break;
14894
14895 case R_PPC64_COPY:
14896 case R_PPC64_GLOB_DAT:
14897 case R_PPC64_JMP_SLOT:
14898 case R_PPC64_JMP_IREL:
14899 case R_PPC64_RELATIVE:
14900 /* We shouldn't ever see these dynamic relocs in relocatable
14901 files. */
14902 /* Fall through. */
14903
14904 case R_PPC64_PLTGOT16:
14905 case R_PPC64_PLTGOT16_DS:
14906 case R_PPC64_PLTGOT16_HA:
14907 case R_PPC64_PLTGOT16_HI:
14908 case R_PPC64_PLTGOT16_LO:
14909 case R_PPC64_PLTGOT16_LO_DS:
14910 case R_PPC64_PLTREL32:
14911 case R_PPC64_PLTREL64:
14912 /* These ones haven't been implemented yet. */
14913
14914 info->callbacks->einfo
14915 (_("%P: %B: %s is not supported for `%T'\n"),
14916 input_bfd,
14917 ppc64_elf_howto_table[r_type]->name, sym_name);
14918
14919 bfd_set_error (bfd_error_invalid_operation);
14920 ret = FALSE;
14921 goto copy_reloc;
14922 }
14923
14924 /* Multi-instruction sequences that access the TOC can be
14925 optimized, eg. addis ra,r2,0; addi rb,ra,x;
14926 to nop; addi rb,r2,x; */
14927 switch (r_type)
14928 {
14929 default:
14930 break;
14931
14932 case R_PPC64_GOT_TLSLD16_HI:
14933 case R_PPC64_GOT_TLSGD16_HI:
14934 case R_PPC64_GOT_TPREL16_HI:
14935 case R_PPC64_GOT_DTPREL16_HI:
14936 case R_PPC64_GOT16_HI:
14937 case R_PPC64_TOC16_HI:
14938 /* These relocs would only be useful if building up an
14939 offset to later add to r2, perhaps in an indexed
14940 addressing mode instruction. Don't try to optimize.
14941 Unfortunately, the possibility of someone building up an
14942 offset like this or even with the HA relocs, means that
14943 we need to check the high insn when optimizing the low
14944 insn. */
14945 break;
14946
14947 case R_PPC64_GOT_TLSLD16_HA:
14948 case R_PPC64_GOT_TLSGD16_HA:
14949 case R_PPC64_GOT_TPREL16_HA:
14950 case R_PPC64_GOT_DTPREL16_HA:
14951 case R_PPC64_GOT16_HA:
14952 case R_PPC64_TOC16_HA:
14953 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
14954 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
14955 {
14956 bfd_byte *p = contents + (rel->r_offset & ~3);
14957 bfd_put_32 (input_bfd, NOP, p);
14958 }
14959 break;
14960
14961 case R_PPC64_GOT_TLSLD16_LO:
14962 case R_PPC64_GOT_TLSGD16_LO:
14963 case R_PPC64_GOT_TPREL16_LO_DS:
14964 case R_PPC64_GOT_DTPREL16_LO_DS:
14965 case R_PPC64_GOT16_LO:
14966 case R_PPC64_GOT16_LO_DS:
14967 case R_PPC64_TOC16_LO:
14968 case R_PPC64_TOC16_LO_DS:
14969 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
14970 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
14971 {
14972 bfd_byte *p = contents + (rel->r_offset & ~3);
14973 insn = bfd_get_32 (input_bfd, p);
14974 if ((insn & (0x3f << 26)) == 12u << 26 /* addic */)
14975 {
14976 /* Transform addic to addi when we change reg. */
14977 insn &= ~((0x3f << 26) | (0x1f << 16));
14978 insn |= (14u << 26) | (2 << 16);
14979 }
14980 else
14981 {
14982 insn &= ~(0x1f << 16);
14983 insn |= 2 << 16;
14984 }
14985 bfd_put_32 (input_bfd, insn, p);
14986 }
14987 break;
14988 }
14989
14990 /* Do any further special processing. */
14991 howto = ppc64_elf_howto_table[(int) r_type];
14992 switch (r_type)
14993 {
14994 default:
14995 break;
14996
14997 case R_PPC64_REL16_HA:
14998 case R_PPC64_REL16DX_HA:
14999 case R_PPC64_ADDR16_HA:
15000 case R_PPC64_ADDR16_HIGHA:
15001 case R_PPC64_ADDR16_HIGHERA:
15002 case R_PPC64_ADDR16_HIGHESTA:
15003 case R_PPC64_TOC16_HA:
15004 case R_PPC64_SECTOFF_HA:
15005 case R_PPC64_TPREL16_HA:
15006 case R_PPC64_TPREL16_HIGHA:
15007 case R_PPC64_TPREL16_HIGHERA:
15008 case R_PPC64_TPREL16_HIGHESTA:
15009 case R_PPC64_DTPREL16_HA:
15010 case R_PPC64_DTPREL16_HIGHA:
15011 case R_PPC64_DTPREL16_HIGHERA:
15012 case R_PPC64_DTPREL16_HIGHESTA:
15013 /* It's just possible that this symbol is a weak symbol
15014 that's not actually defined anywhere. In that case,
15015 'sec' would be NULL, and we should leave the symbol
15016 alone (it will be set to zero elsewhere in the link). */
15017 if (sec == NULL)
15018 break;
15019 /* Fall thru */
15020
15021 case R_PPC64_GOT16_HA:
15022 case R_PPC64_PLTGOT16_HA:
15023 case R_PPC64_PLT16_HA:
15024 case R_PPC64_GOT_TLSGD16_HA:
15025 case R_PPC64_GOT_TLSLD16_HA:
15026 case R_PPC64_GOT_TPREL16_HA:
15027 case R_PPC64_GOT_DTPREL16_HA:
15028 /* Add 0x10000 if sign bit in 0:15 is set.
15029 Bits 0:15 are not used. */
15030 addend += 0x8000;
15031 break;
15032
15033 case R_PPC64_ADDR16_DS:
15034 case R_PPC64_ADDR16_LO_DS:
15035 case R_PPC64_GOT16_DS:
15036 case R_PPC64_GOT16_LO_DS:
15037 case R_PPC64_PLT16_LO_DS:
15038 case R_PPC64_SECTOFF_DS:
15039 case R_PPC64_SECTOFF_LO_DS:
15040 case R_PPC64_TOC16_DS:
15041 case R_PPC64_TOC16_LO_DS:
15042 case R_PPC64_PLTGOT16_DS:
15043 case R_PPC64_PLTGOT16_LO_DS:
15044 case R_PPC64_GOT_TPREL16_DS:
15045 case R_PPC64_GOT_TPREL16_LO_DS:
15046 case R_PPC64_GOT_DTPREL16_DS:
15047 case R_PPC64_GOT_DTPREL16_LO_DS:
15048 case R_PPC64_TPREL16_DS:
15049 case R_PPC64_TPREL16_LO_DS:
15050 case R_PPC64_DTPREL16_DS:
15051 case R_PPC64_DTPREL16_LO_DS:
15052 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
15053 mask = 3;
15054 /* If this reloc is against an lq, lxv, or stxv insn, then
15055 the value must be a multiple of 16. This is somewhat of
15056 a hack, but the "correct" way to do this by defining _DQ
15057 forms of all the _DS relocs bloats all reloc switches in
15058 this file. It doesn't make much sense to use these
15059 relocs in data, so testing the insn should be safe. */
15060 if ((insn & (0x3f << 26)) == (56u << 26)
15061 || ((insn & (0x3f << 26)) == (61u << 26) && (insn & 3) == 1))
15062 mask = 15;
15063 relocation += addend;
15064 addend = insn & (mask ^ 3);
15065 if ((relocation & mask) != 0)
15066 {
15067 relocation ^= relocation & mask;
15068 info->callbacks->einfo
15069 (_("%P: %H: error: %s not a multiple of %u\n"),
15070 input_bfd, input_section, rel->r_offset,
15071 howto->name,
15072 mask + 1);
15073 bfd_set_error (bfd_error_bad_value);
15074 ret = FALSE;
15075 goto copy_reloc;
15076 }
15077 break;
15078 }
15079
15080 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
15081 because such sections are not SEC_ALLOC and thus ld.so will
15082 not process them. */
15083 if (unresolved_reloc
15084 && !((input_section->flags & SEC_DEBUGGING) != 0
15085 && h->elf.def_dynamic)
15086 && _bfd_elf_section_offset (output_bfd, info, input_section,
15087 rel->r_offset) != (bfd_vma) -1)
15088 {
15089 info->callbacks->einfo
15090 (_("%P: %H: unresolvable %s against `%T'\n"),
15091 input_bfd, input_section, rel->r_offset,
15092 howto->name,
15093 h->elf.root.root.string);
15094 ret = FALSE;
15095 }
15096
15097 /* 16-bit fields in insns mostly have signed values, but a
15098 few insns have 16-bit unsigned values. Really, we should
15099 have different reloc types. */
15100 if (howto->complain_on_overflow != complain_overflow_dont
15101 && howto->dst_mask == 0xffff
15102 && (input_section->flags & SEC_CODE) != 0)
15103 {
15104 enum complain_overflow complain = complain_overflow_signed;
15105
15106 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
15107 if ((insn & (0x3f << 26)) == 10u << 26 /* cmpli */)
15108 complain = complain_overflow_bitfield;
15109 else if (howto->rightshift == 0
15110 ? ((insn & (0x3f << 26)) == 28u << 26 /* andi */
15111 || (insn & (0x3f << 26)) == 24u << 26 /* ori */
15112 || (insn & (0x3f << 26)) == 26u << 26 /* xori */)
15113 : ((insn & (0x3f << 26)) == 29u << 26 /* andis */
15114 || (insn & (0x3f << 26)) == 25u << 26 /* oris */
15115 || (insn & (0x3f << 26)) == 27u << 26 /* xoris */))
15116 complain = complain_overflow_unsigned;
15117 if (howto->complain_on_overflow != complain)
15118 {
15119 alt_howto = *howto;
15120 alt_howto.complain_on_overflow = complain;
15121 howto = &alt_howto;
15122 }
15123 }
15124
15125 if (r_type == R_PPC64_REL16DX_HA)
15126 {
15127 /* Split field reloc isn't handled by _bfd_final_link_relocate. */
15128 if (rel->r_offset + 4 > input_section->size)
15129 r = bfd_reloc_outofrange;
15130 else
15131 {
15132 relocation += addend;
15133 relocation -= (rel->r_offset
15134 + input_section->output_offset
15135 + input_section->output_section->vma);
15136 relocation = (bfd_signed_vma) relocation >> 16;
15137 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
15138 insn &= ~0x1fffc1;
15139 insn |= (relocation & 0xffc1) | ((relocation & 0x3e) << 15);
15140 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
15141 r = bfd_reloc_ok;
15142 if (relocation + 0x8000 > 0xffff)
15143 r = bfd_reloc_overflow;
15144 }
15145 }
15146 else
15147 r = _bfd_final_link_relocate (howto, input_bfd, input_section, contents,
15148 rel->r_offset, relocation, addend);
15149
15150 if (r != bfd_reloc_ok)
15151 {
15152 char *more_info = NULL;
15153 const char *reloc_name = howto->name;
15154
15155 if (reloc_dest != DEST_NORMAL)
15156 {
15157 more_info = bfd_malloc (strlen (reloc_name) + 8);
15158 if (more_info != NULL)
15159 {
15160 strcpy (more_info, reloc_name);
15161 strcat (more_info, (reloc_dest == DEST_OPD
15162 ? " (OPD)" : " (stub)"));
15163 reloc_name = more_info;
15164 }
15165 }
15166
15167 if (r == bfd_reloc_overflow)
15168 {
15169 /* On code like "if (foo) foo();" don't report overflow
15170 on a branch to zero when foo is undefined. */
15171 if (!warned
15172 && (reloc_dest == DEST_STUB
15173 || !(h != NULL
15174 && (h->elf.root.type == bfd_link_hash_undefweak
15175 || h->elf.root.type == bfd_link_hash_undefined)
15176 && is_branch_reloc (r_type))))
15177 info->callbacks->reloc_overflow (info, &h->elf.root,
15178 sym_name, reloc_name,
15179 orig_rel.r_addend,
15180 input_bfd, input_section,
15181 rel->r_offset);
15182 }
15183 else
15184 {
15185 info->callbacks->einfo
15186 (_("%P: %H: %s against `%T': error %d\n"),
15187 input_bfd, input_section, rel->r_offset,
15188 reloc_name, sym_name, (int) r);
15189 ret = FALSE;
15190 }
15191 if (more_info != NULL)
15192 free (more_info);
15193 }
15194 copy_reloc:
15195 if (wrel != rel)
15196 *wrel = *rel;
15197 }
15198
15199 if (wrel != rel)
15200 {
15201 Elf_Internal_Shdr *rel_hdr;
15202 size_t deleted = rel - wrel;
15203
15204 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
15205 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
15206 if (rel_hdr->sh_size == 0)
15207 {
15208 /* It is too late to remove an empty reloc section. Leave
15209 one NONE reloc.
15210 ??? What is wrong with an empty section??? */
15211 rel_hdr->sh_size = rel_hdr->sh_entsize;
15212 deleted -= 1;
15213 }
15214 rel_hdr = _bfd_elf_single_rel_hdr (input_section);
15215 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
15216 input_section->reloc_count -= deleted;
15217 }
15218
15219 /* If we're emitting relocations, then shortly after this function
15220 returns, reloc offsets and addends for this section will be
15221 adjusted. Worse, reloc symbol indices will be for the output
15222 file rather than the input. Save a copy of the relocs for
15223 opd_entry_value. */
15224 if (is_opd && (info->emitrelocations || bfd_link_relocatable (info)))
15225 {
15226 bfd_size_type amt;
15227 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
15228 rel = bfd_alloc (input_bfd, amt);
15229 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd.relocs == NULL);
15230 ppc64_elf_tdata (input_bfd)->opd.relocs = rel;
15231 if (rel == NULL)
15232 return FALSE;
15233 memcpy (rel, relocs, amt);
15234 }
15235 return ret;
15236 }
15237
15238 /* Adjust the value of any local symbols in opd sections. */
15239
15240 static int
15241 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
15242 const char *name ATTRIBUTE_UNUSED,
15243 Elf_Internal_Sym *elfsym,
15244 asection *input_sec,
15245 struct elf_link_hash_entry *h)
15246 {
15247 struct _opd_sec_data *opd;
15248 long adjust;
15249 bfd_vma value;
15250
15251 if (h != NULL)
15252 return 1;
15253
15254 opd = get_opd_info (input_sec);
15255 if (opd == NULL || opd->adjust == NULL)
15256 return 1;
15257
15258 value = elfsym->st_value - input_sec->output_offset;
15259 if (!bfd_link_relocatable (info))
15260 value -= input_sec->output_section->vma;
15261
15262 adjust = opd->adjust[OPD_NDX (value)];
15263 if (adjust == -1)
15264 return 2;
15265
15266 elfsym->st_value += adjust;
15267 return 1;
15268 }
15269
15270 /* Finish up dynamic symbol handling. We set the contents of various
15271 dynamic sections here. */
15272
15273 static bfd_boolean
15274 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
15275 struct bfd_link_info *info,
15276 struct elf_link_hash_entry *h,
15277 Elf_Internal_Sym *sym ATTRIBUTE_UNUSED)
15278 {
15279 struct ppc_link_hash_table *htab;
15280 struct plt_entry *ent;
15281 Elf_Internal_Rela rela;
15282 bfd_byte *loc;
15283
15284 htab = ppc_hash_table (info);
15285 if (htab == NULL)
15286 return FALSE;
15287
15288 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
15289 if (ent->plt.offset != (bfd_vma) -1)
15290 {
15291 /* This symbol has an entry in the procedure linkage
15292 table. Set it up. */
15293 if (!htab->elf.dynamic_sections_created
15294 || h->dynindx == -1)
15295 {
15296 BFD_ASSERT (h->type == STT_GNU_IFUNC
15297 && h->def_regular
15298 && (h->root.type == bfd_link_hash_defined
15299 || h->root.type == bfd_link_hash_defweak));
15300 rela.r_offset = (htab->elf.iplt->output_section->vma
15301 + htab->elf.iplt->output_offset
15302 + ent->plt.offset);
15303 if (htab->opd_abi)
15304 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
15305 else
15306 rela.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
15307 rela.r_addend = (h->root.u.def.value
15308 + h->root.u.def.section->output_offset
15309 + h->root.u.def.section->output_section->vma
15310 + ent->addend);
15311 loc = (htab->elf.irelplt->contents
15312 + (htab->elf.irelplt->reloc_count++
15313 * sizeof (Elf64_External_Rela)));
15314 }
15315 else
15316 {
15317 rela.r_offset = (htab->elf.splt->output_section->vma
15318 + htab->elf.splt->output_offset
15319 + ent->plt.offset);
15320 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
15321 rela.r_addend = ent->addend;
15322 loc = (htab->elf.srelplt->contents
15323 + ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE (htab))
15324 / PLT_ENTRY_SIZE (htab) * sizeof (Elf64_External_Rela)));
15325 }
15326 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
15327
15328 if (!htab->opd_abi)
15329 {
15330 if (!h->def_regular)
15331 {
15332 /* Mark the symbol as undefined, rather than as
15333 defined in glink. Leave the value if there were
15334 any relocations where pointer equality matters
15335 (this is a clue for the dynamic linker, to make
15336 function pointer comparisons work between an
15337 application and shared library), otherwise set it
15338 to zero. */
15339 sym->st_shndx = SHN_UNDEF;
15340 if (!h->pointer_equality_needed)
15341 sym->st_value = 0;
15342 else if (!h->ref_regular_nonweak)
15343 {
15344 /* This breaks function pointer comparisons, but
15345 that is better than breaking tests for a NULL
15346 function pointer. */
15347 sym->st_value = 0;
15348 }
15349 }
15350 }
15351 }
15352
15353 if (h->needs_copy)
15354 {
15355 /* This symbol needs a copy reloc. Set it up. */
15356
15357 if (h->dynindx == -1
15358 || (h->root.type != bfd_link_hash_defined
15359 && h->root.type != bfd_link_hash_defweak)
15360 || htab->relbss == NULL)
15361 abort ();
15362
15363 rela.r_offset = (h->root.u.def.value
15364 + h->root.u.def.section->output_section->vma
15365 + h->root.u.def.section->output_offset);
15366 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
15367 rela.r_addend = 0;
15368 loc = htab->relbss->contents;
15369 loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela);
15370 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
15371 }
15372
15373 return TRUE;
15374 }
15375
15376 /* Used to decide how to sort relocs in an optimal manner for the
15377 dynamic linker, before writing them out. */
15378
15379 static enum elf_reloc_type_class
15380 ppc64_elf_reloc_type_class (const struct bfd_link_info *info,
15381 const asection *rel_sec,
15382 const Elf_Internal_Rela *rela)
15383 {
15384 enum elf_ppc64_reloc_type r_type;
15385 struct ppc_link_hash_table *htab = ppc_hash_table (info);
15386
15387 if (rel_sec == htab->elf.irelplt)
15388 return reloc_class_ifunc;
15389
15390 r_type = ELF64_R_TYPE (rela->r_info);
15391 switch (r_type)
15392 {
15393 case R_PPC64_RELATIVE:
15394 return reloc_class_relative;
15395 case R_PPC64_JMP_SLOT:
15396 return reloc_class_plt;
15397 case R_PPC64_COPY:
15398 return reloc_class_copy;
15399 default:
15400 return reloc_class_normal;
15401 }
15402 }
15403
15404 /* Finish up the dynamic sections. */
15405
15406 static bfd_boolean
15407 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
15408 struct bfd_link_info *info)
15409 {
15410 struct ppc_link_hash_table *htab;
15411 bfd *dynobj;
15412 asection *sdyn;
15413
15414 htab = ppc_hash_table (info);
15415 if (htab == NULL)
15416 return FALSE;
15417
15418 dynobj = htab->elf.dynobj;
15419 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
15420
15421 if (htab->elf.dynamic_sections_created)
15422 {
15423 Elf64_External_Dyn *dyncon, *dynconend;
15424
15425 if (sdyn == NULL || htab->elf.sgot == NULL)
15426 abort ();
15427
15428 dyncon = (Elf64_External_Dyn *) sdyn->contents;
15429 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
15430 for (; dyncon < dynconend; dyncon++)
15431 {
15432 Elf_Internal_Dyn dyn;
15433 asection *s;
15434
15435 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
15436
15437 switch (dyn.d_tag)
15438 {
15439 default:
15440 continue;
15441
15442 case DT_PPC64_GLINK:
15443 s = htab->glink;
15444 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15445 /* We stupidly defined DT_PPC64_GLINK to be the start
15446 of glink rather than the first entry point, which is
15447 what ld.so needs, and now have a bigger stub to
15448 support automatic multiple TOCs. */
15449 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 8 * 4;
15450 break;
15451
15452 case DT_PPC64_OPD:
15453 s = bfd_get_section_by_name (output_bfd, ".opd");
15454 if (s == NULL)
15455 continue;
15456 dyn.d_un.d_ptr = s->vma;
15457 break;
15458
15459 case DT_PPC64_OPT:
15460 if (htab->do_multi_toc && htab->multi_toc_needed)
15461 dyn.d_un.d_val |= PPC64_OPT_MULTI_TOC;
15462 break;
15463
15464 case DT_PPC64_OPDSZ:
15465 s = bfd_get_section_by_name (output_bfd, ".opd");
15466 if (s == NULL)
15467 continue;
15468 dyn.d_un.d_val = s->size;
15469 break;
15470
15471 case DT_PLTGOT:
15472 s = htab->elf.splt;
15473 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15474 break;
15475
15476 case DT_JMPREL:
15477 s = htab->elf.srelplt;
15478 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15479 break;
15480
15481 case DT_PLTRELSZ:
15482 dyn.d_un.d_val = htab->elf.srelplt->size;
15483 break;
15484
15485 case DT_RELASZ:
15486 /* Don't count procedure linkage table relocs in the
15487 overall reloc count. */
15488 s = htab->elf.srelplt;
15489 if (s == NULL)
15490 continue;
15491 dyn.d_un.d_val -= s->size;
15492 break;
15493
15494 case DT_RELA:
15495 /* We may not be using the standard ELF linker script.
15496 If .rela.plt is the first .rela section, we adjust
15497 DT_RELA to not include it. */
15498 s = htab->elf.srelplt;
15499 if (s == NULL)
15500 continue;
15501 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
15502 continue;
15503 dyn.d_un.d_ptr += s->size;
15504 break;
15505 }
15506
15507 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
15508 }
15509 }
15510
15511 if (htab->elf.sgot != NULL && htab->elf.sgot->size != 0)
15512 {
15513 /* Fill in the first entry in the global offset table.
15514 We use it to hold the link-time TOCbase. */
15515 bfd_put_64 (output_bfd,
15516 elf_gp (output_bfd) + TOC_BASE_OFF,
15517 htab->elf.sgot->contents);
15518
15519 /* Set .got entry size. */
15520 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 8;
15521 }
15522
15523 if (htab->elf.splt != NULL && htab->elf.splt->size != 0)
15524 {
15525 /* Set .plt entry size. */
15526 elf_section_data (htab->elf.splt->output_section)->this_hdr.sh_entsize
15527 = PLT_ENTRY_SIZE (htab);
15528 }
15529
15530 /* brlt is SEC_LINKER_CREATED, so we need to write out relocs for
15531 brlt ourselves if emitrelocations. */
15532 if (htab->brlt != NULL
15533 && htab->brlt->reloc_count != 0
15534 && !_bfd_elf_link_output_relocs (output_bfd,
15535 htab->brlt,
15536 elf_section_data (htab->brlt)->rela.hdr,
15537 elf_section_data (htab->brlt)->relocs,
15538 NULL))
15539 return FALSE;
15540
15541 if (htab->glink != NULL
15542 && htab->glink->reloc_count != 0
15543 && !_bfd_elf_link_output_relocs (output_bfd,
15544 htab->glink,
15545 elf_section_data (htab->glink)->rela.hdr,
15546 elf_section_data (htab->glink)->relocs,
15547 NULL))
15548 return FALSE;
15549
15550 if (htab->glink_eh_frame != NULL
15551 && htab->glink_eh_frame->size != 0)
15552 {
15553 bfd_vma val;
15554 bfd_byte *p;
15555 asection *stub_sec;
15556
15557 p = htab->glink_eh_frame->contents + sizeof (glink_eh_frame_cie);
15558 for (stub_sec = htab->params->stub_bfd->sections;
15559 stub_sec != NULL;
15560 stub_sec = stub_sec->next)
15561 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
15562 {
15563 /* FDE length. */
15564 p += 4;
15565 /* CIE pointer. */
15566 p += 4;
15567 /* Offset to stub section. */
15568 val = (stub_sec->output_section->vma
15569 + stub_sec->output_offset);
15570 val -= (htab->glink_eh_frame->output_section->vma
15571 + htab->glink_eh_frame->output_offset
15572 + (p - htab->glink_eh_frame->contents));
15573 if (val + 0x80000000 > 0xffffffff)
15574 {
15575 info->callbacks->einfo
15576 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
15577 stub_sec->name);
15578 return FALSE;
15579 }
15580 bfd_put_32 (dynobj, val, p);
15581 p += 4;
15582 /* stub section size. */
15583 p += 4;
15584 /* Augmentation. */
15585 p += 1;
15586 /* Pad. */
15587 p += 7;
15588 }
15589 if (htab->glink != NULL && htab->glink->size != 0)
15590 {
15591 /* FDE length. */
15592 p += 4;
15593 /* CIE pointer. */
15594 p += 4;
15595 /* Offset to .glink. */
15596 val = (htab->glink->output_section->vma
15597 + htab->glink->output_offset
15598 + 8);
15599 val -= (htab->glink_eh_frame->output_section->vma
15600 + htab->glink_eh_frame->output_offset
15601 + (p - htab->glink_eh_frame->contents));
15602 if (val + 0x80000000 > 0xffffffff)
15603 {
15604 info->callbacks->einfo
15605 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
15606 htab->glink->name);
15607 return FALSE;
15608 }
15609 bfd_put_32 (dynobj, val, p);
15610 p += 4;
15611 /* .glink size. */
15612 p += 4;
15613 /* Augmentation. */
15614 p += 1;
15615 /* Ops. */
15616 p += 7;
15617 }
15618
15619 if (htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME
15620 && !_bfd_elf_write_section_eh_frame (output_bfd, info,
15621 htab->glink_eh_frame,
15622 htab->glink_eh_frame->contents))
15623 return FALSE;
15624 }
15625
15626 /* We need to handle writing out multiple GOT sections ourselves,
15627 since we didn't add them to DYNOBJ. We know dynobj is the first
15628 bfd. */
15629 while ((dynobj = dynobj->link.next) != NULL)
15630 {
15631 asection *s;
15632
15633 if (!is_ppc64_elf (dynobj))
15634 continue;
15635
15636 s = ppc64_elf_tdata (dynobj)->got;
15637 if (s != NULL
15638 && s->size != 0
15639 && s->output_section != bfd_abs_section_ptr
15640 && !bfd_set_section_contents (output_bfd, s->output_section,
15641 s->contents, s->output_offset,
15642 s->size))
15643 return FALSE;
15644 s = ppc64_elf_tdata (dynobj)->relgot;
15645 if (s != NULL
15646 && s->size != 0
15647 && s->output_section != bfd_abs_section_ptr
15648 && !bfd_set_section_contents (output_bfd, s->output_section,
15649 s->contents, s->output_offset,
15650 s->size))
15651 return FALSE;
15652 }
15653
15654 return TRUE;
15655 }
15656
15657 #include "elf64-target.h"
15658
15659 /* FreeBSD support */
15660
15661 #undef TARGET_LITTLE_SYM
15662 #undef TARGET_LITTLE_NAME
15663
15664 #undef TARGET_BIG_SYM
15665 #define TARGET_BIG_SYM powerpc_elf64_fbsd_vec
15666 #undef TARGET_BIG_NAME
15667 #define TARGET_BIG_NAME "elf64-powerpc-freebsd"
15668
15669 #undef ELF_OSABI
15670 #define ELF_OSABI ELFOSABI_FREEBSD
15671
15672 #undef elf64_bed
15673 #define elf64_bed elf64_powerpc_fbsd_bed
15674
15675 #include "elf64-target.h"
15676
GDB Binutils - Deliverables
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