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Remove syntactic sugar
[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 static asection *synthetic_opd;
3089
3090 /* qsort comparison function for ppc64_elf_get_synthetic_symtab. */
3091
3092 static int
3093 compare_symbols (const void *ap, const void *bp)
3094 {
3095 const asymbol *a = * (const asymbol **) ap;
3096 const asymbol *b = * (const asymbol **) bp;
3097
3098 /* Section symbols first. */
3099 if ((a->flags & BSF_SECTION_SYM) && !(b->flags & BSF_SECTION_SYM))
3100 return -1;
3101 if (!(a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM))
3102 return 1;
3103
3104 /* then .opd symbols. */
3105 if (synthetic_opd != NULL)
3106 {
3107 if (strcmp (a->section->name, ".opd") == 0
3108 && strcmp (b->section->name, ".opd") != 0)
3109 return -1;
3110 if (strcmp (a->section->name, ".opd") != 0
3111 && strcmp (b->section->name, ".opd") == 0)
3112 return 1;
3113 }
3114
3115 /* then other code symbols. */
3116 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3117 == (SEC_CODE | SEC_ALLOC)
3118 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3119 != (SEC_CODE | SEC_ALLOC))
3120 return -1;
3121
3122 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3123 != (SEC_CODE | SEC_ALLOC)
3124 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3125 == (SEC_CODE | SEC_ALLOC))
3126 return 1;
3127
3128 if (synthetic_relocatable)
3129 {
3130 if (a->section->id < b->section->id)
3131 return -1;
3132
3133 if (a->section->id > b->section->id)
3134 return 1;
3135 }
3136
3137 if (a->value + a->section->vma < b->value + b->section->vma)
3138 return -1;
3139
3140 if (a->value + a->section->vma > b->value + b->section->vma)
3141 return 1;
3142
3143 /* For syms with the same value, prefer strong dynamic global function
3144 syms over other syms. */
3145 if ((a->flags & BSF_GLOBAL) != 0 && (b->flags & BSF_GLOBAL) == 0)
3146 return -1;
3147
3148 if ((a->flags & BSF_GLOBAL) == 0 && (b->flags & BSF_GLOBAL) != 0)
3149 return 1;
3150
3151 if ((a->flags & BSF_FUNCTION) != 0 && (b->flags & BSF_FUNCTION) == 0)
3152 return -1;
3153
3154 if ((a->flags & BSF_FUNCTION) == 0 && (b->flags & BSF_FUNCTION) != 0)
3155 return 1;
3156
3157 if ((a->flags & BSF_WEAK) == 0 && (b->flags & BSF_WEAK) != 0)
3158 return -1;
3159
3160 if ((a->flags & BSF_WEAK) != 0 && (b->flags & BSF_WEAK) == 0)
3161 return 1;
3162
3163 if ((a->flags & BSF_DYNAMIC) != 0 && (b->flags & BSF_DYNAMIC) == 0)
3164 return -1;
3165
3166 if ((a->flags & BSF_DYNAMIC) == 0 && (b->flags & BSF_DYNAMIC) != 0)
3167 return 1;
3168
3169 return 0;
3170 }
3171
3172 /* Search SYMS for a symbol of the given VALUE. */
3173
3174 static asymbol *
3175 sym_exists_at (asymbol **syms, long lo, long hi, unsigned int id, bfd_vma value)
3176 {
3177 long mid;
3178
3179 if (id == (unsigned) -1)
3180 {
3181 while (lo < hi)
3182 {
3183 mid = (lo + hi) >> 1;
3184 if (syms[mid]->value + syms[mid]->section->vma < value)
3185 lo = mid + 1;
3186 else if (syms[mid]->value + syms[mid]->section->vma > value)
3187 hi = mid;
3188 else
3189 return syms[mid];
3190 }
3191 }
3192 else
3193 {
3194 while (lo < hi)
3195 {
3196 mid = (lo + hi) >> 1;
3197 if (syms[mid]->section->id < id)
3198 lo = mid + 1;
3199 else if (syms[mid]->section->id > id)
3200 hi = mid;
3201 else if (syms[mid]->value < value)
3202 lo = mid + 1;
3203 else if (syms[mid]->value > value)
3204 hi = mid;
3205 else
3206 return syms[mid];
3207 }
3208 }
3209 return NULL;
3210 }
3211
3212 static bfd_boolean
3213 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
3214 {
3215 bfd_vma vma = *(bfd_vma *) ptr;
3216 return ((section->flags & SEC_ALLOC) != 0
3217 && section->vma <= vma
3218 && vma < section->vma + section->size);
3219 }
3220
3221 /* Create synthetic symbols, effectively restoring "dot-symbol" function
3222 entry syms. Also generate @plt symbols for the glink branch table.
3223 Returns count of synthetic symbols in RET or -1 on error. */
3224
3225 static long
3226 ppc64_elf_get_synthetic_symtab (bfd *abfd,
3227 long static_count, asymbol **static_syms,
3228 long dyn_count, asymbol **dyn_syms,
3229 asymbol **ret)
3230 {
3231 asymbol *s;
3232 long i;
3233 long count;
3234 char *names;
3235 long symcount, codesecsym, codesecsymend, secsymend, opdsymend;
3236 asection *opd = NULL;
3237 bfd_boolean relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0;
3238 asymbol **syms;
3239 int abi = abiversion (abfd);
3240
3241 *ret = NULL;
3242
3243 if (abi < 2)
3244 {
3245 opd = bfd_get_section_by_name (abfd, ".opd");
3246 if (opd == NULL && abi == 1)
3247 return 0;
3248 }
3249
3250 symcount = static_count;
3251 if (!relocatable)
3252 symcount += dyn_count;
3253 if (symcount == 0)
3254 return 0;
3255
3256 syms = bfd_malloc ((symcount + 1) * sizeof (*syms));
3257 if (syms == NULL)
3258 return -1;
3259
3260 if (!relocatable && static_count != 0 && dyn_count != 0)
3261 {
3262 /* Use both symbol tables. */
3263 memcpy (syms, static_syms, static_count * sizeof (*syms));
3264 memcpy (syms + static_count, dyn_syms, (dyn_count + 1) * sizeof (*syms));
3265 }
3266 else if (!relocatable && static_count == 0)
3267 memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms));
3268 else
3269 memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms));
3270
3271 synthetic_relocatable = relocatable;
3272 synthetic_opd = opd;
3273 qsort (syms, symcount, sizeof (*syms), compare_symbols);
3274
3275 if (!relocatable && symcount > 1)
3276 {
3277 long j;
3278 /* Trim duplicate syms, since we may have merged the normal and
3279 dynamic symbols. Actually, we only care about syms that have
3280 different values, so trim any with the same value. */
3281 for (i = 1, j = 1; i < symcount; ++i)
3282 if (syms[i - 1]->value + syms[i - 1]->section->vma
3283 != syms[i]->value + syms[i]->section->vma)
3284 syms[j++] = syms[i];
3285 symcount = j;
3286 }
3287
3288 i = 0;
3289 /* Note that here and in compare_symbols we can't compare opd and
3290 sym->section directly. With separate debug info files, the
3291 symbols will be extracted from the debug file while abfd passed
3292 to this function is the real binary. */
3293 if (opd != NULL && strcmp (syms[i]->section->name, ".opd") == 0)
3294 ++i;
3295 codesecsym = i;
3296
3297 for (; i < symcount; ++i)
3298 if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3299 != (SEC_CODE | SEC_ALLOC))
3300 || (syms[i]->flags & BSF_SECTION_SYM) == 0)
3301 break;
3302 codesecsymend = i;
3303
3304 for (; i < symcount; ++i)
3305 if ((syms[i]->flags & BSF_SECTION_SYM) == 0)
3306 break;
3307 secsymend = i;
3308
3309 if (opd != NULL)
3310 for (; i < symcount; ++i)
3311 if (strcmp (syms[i]->section->name, ".opd") != 0)
3312 break;
3313 opdsymend = i;
3314
3315 for (; i < symcount; ++i)
3316 if ((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3317 != (SEC_CODE | SEC_ALLOC))
3318 break;
3319 symcount = i;
3320
3321 count = 0;
3322
3323 if (relocatable)
3324 {
3325 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3326 arelent *r;
3327 size_t size;
3328 long relcount;
3329
3330 if (opdsymend == secsymend)
3331 goto done;
3332
3333 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3334 relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0;
3335 if (relcount == 0)
3336 goto done;
3337
3338 if (!(*slurp_relocs) (abfd, opd, static_syms, FALSE))
3339 {
3340 count = -1;
3341 goto done;
3342 }
3343
3344 size = 0;
3345 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3346 {
3347 asymbol *sym;
3348
3349 while (r < opd->relocation + relcount
3350 && r->address < syms[i]->value + opd->vma)
3351 ++r;
3352
3353 if (r == opd->relocation + relcount)
3354 break;
3355
3356 if (r->address != syms[i]->value + opd->vma)
3357 continue;
3358
3359 if (r->howto->type != R_PPC64_ADDR64)
3360 continue;
3361
3362 sym = *r->sym_ptr_ptr;
3363 if (!sym_exists_at (syms, opdsymend, symcount,
3364 sym->section->id, sym->value + r->addend))
3365 {
3366 ++count;
3367 size += sizeof (asymbol);
3368 size += strlen (syms[i]->name) + 2;
3369 }
3370 }
3371
3372 if (size == 0)
3373 goto done;
3374 s = *ret = bfd_malloc (size);
3375 if (s == NULL)
3376 {
3377 count = -1;
3378 goto done;
3379 }
3380
3381 names = (char *) (s + count);
3382
3383 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3384 {
3385 asymbol *sym;
3386
3387 while (r < opd->relocation + relcount
3388 && r->address < syms[i]->value + opd->vma)
3389 ++r;
3390
3391 if (r == opd->relocation + relcount)
3392 break;
3393
3394 if (r->address != syms[i]->value + opd->vma)
3395 continue;
3396
3397 if (r->howto->type != R_PPC64_ADDR64)
3398 continue;
3399
3400 sym = *r->sym_ptr_ptr;
3401 if (!sym_exists_at (syms, opdsymend, symcount,
3402 sym->section->id, sym->value + r->addend))
3403 {
3404 size_t len;
3405
3406 *s = *syms[i];
3407 s->flags |= BSF_SYNTHETIC;
3408 s->section = sym->section;
3409 s->value = sym->value + r->addend;
3410 s->name = names;
3411 *names++ = '.';
3412 len = strlen (syms[i]->name);
3413 memcpy (names, syms[i]->name, len + 1);
3414 names += len + 1;
3415 /* Have udata.p point back to the original symbol this
3416 synthetic symbol was derived from. */
3417 s->udata.p = syms[i];
3418 s++;
3419 }
3420 }
3421 }
3422 else
3423 {
3424 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3425 bfd_byte *contents = NULL;
3426 size_t size;
3427 long plt_count = 0;
3428 bfd_vma glink_vma = 0, resolv_vma = 0;
3429 asection *dynamic, *glink = NULL, *relplt = NULL;
3430 arelent *p;
3431
3432 if (opd != NULL && !bfd_malloc_and_get_section (abfd, opd, &contents))
3433 {
3434 free_contents_and_exit_err:
3435 count = -1;
3436 free_contents_and_exit:
3437 if (contents)
3438 free (contents);
3439 goto done;
3440 }
3441
3442 size = 0;
3443 for (i = secsymend; i < opdsymend; ++i)
3444 {
3445 bfd_vma ent;
3446
3447 /* Ignore bogus symbols. */
3448 if (syms[i]->value > opd->size - 8)
3449 continue;
3450
3451 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3452 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3453 {
3454 ++count;
3455 size += sizeof (asymbol);
3456 size += strlen (syms[i]->name) + 2;
3457 }
3458 }
3459
3460 /* Get start of .glink stubs from DT_PPC64_GLINK. */
3461 if (dyn_count != 0
3462 && (dynamic = bfd_get_section_by_name (abfd, ".dynamic")) != NULL)
3463 {
3464 bfd_byte *dynbuf, *extdyn, *extdynend;
3465 size_t extdynsize;
3466 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
3467
3468 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
3469 goto free_contents_and_exit_err;
3470
3471 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
3472 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
3473
3474 extdyn = dynbuf;
3475 extdynend = extdyn + dynamic->size;
3476 for (; extdyn < extdynend; extdyn += extdynsize)
3477 {
3478 Elf_Internal_Dyn dyn;
3479 (*swap_dyn_in) (abfd, extdyn, &dyn);
3480
3481 if (dyn.d_tag == DT_NULL)
3482 break;
3483
3484 if (dyn.d_tag == DT_PPC64_GLINK)
3485 {
3486 /* The first glink stub starts at offset 32; see
3487 comment in ppc64_elf_finish_dynamic_sections. */
3488 glink_vma = dyn.d_un.d_val + GLINK_CALL_STUB_SIZE - 8 * 4;
3489 /* The .glink section usually does not survive the final
3490 link; search for the section (usually .text) where the
3491 glink stubs now reside. */
3492 glink = bfd_sections_find_if (abfd, section_covers_vma,
3493 &glink_vma);
3494 break;
3495 }
3496 }
3497
3498 free (dynbuf);
3499 }
3500
3501 if (glink != NULL)
3502 {
3503 /* Determine __glink trampoline by reading the relative branch
3504 from the first glink stub. */
3505 bfd_byte buf[4];
3506 unsigned int off = 0;
3507
3508 while (bfd_get_section_contents (abfd, glink, buf,
3509 glink_vma + off - glink->vma, 4))
3510 {
3511 unsigned int insn = bfd_get_32 (abfd, buf);
3512 insn ^= B_DOT;
3513 if ((insn & ~0x3fffffc) == 0)
3514 {
3515 resolv_vma = glink_vma + off + (insn ^ 0x2000000) - 0x2000000;
3516 break;
3517 }
3518 off += 4;
3519 if (off > 4)
3520 break;
3521 }
3522
3523 if (resolv_vma)
3524 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
3525
3526 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
3527 if (relplt != NULL)
3528 {
3529 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3530 if (! (*slurp_relocs) (abfd, relplt, dyn_syms, TRUE))
3531 goto free_contents_and_exit_err;
3532
3533 plt_count = relplt->size / sizeof (Elf64_External_Rela);
3534 size += plt_count * sizeof (asymbol);
3535
3536 p = relplt->relocation;
3537 for (i = 0; i < plt_count; i++, p++)
3538 {
3539 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
3540 if (p->addend != 0)
3541 size += sizeof ("+0x") - 1 + 16;
3542 }
3543 }
3544 }
3545
3546 if (size == 0)
3547 goto free_contents_and_exit;
3548 s = *ret = bfd_malloc (size);
3549 if (s == NULL)
3550 goto free_contents_and_exit_err;
3551
3552 names = (char *) (s + count + plt_count + (resolv_vma != 0));
3553
3554 for (i = secsymend; i < opdsymend; ++i)
3555 {
3556 bfd_vma ent;
3557
3558 if (syms[i]->value > opd->size - 8)
3559 continue;
3560
3561 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3562 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3563 {
3564 long lo, hi;
3565 size_t len;
3566 asection *sec = abfd->sections;
3567
3568 *s = *syms[i];
3569 lo = codesecsym;
3570 hi = codesecsymend;
3571 while (lo < hi)
3572 {
3573 long mid = (lo + hi) >> 1;
3574 if (syms[mid]->section->vma < ent)
3575 lo = mid + 1;
3576 else if (syms[mid]->section->vma > ent)
3577 hi = mid;
3578 else
3579 {
3580 sec = syms[mid]->section;
3581 break;
3582 }
3583 }
3584
3585 if (lo >= hi && lo > codesecsym)
3586 sec = syms[lo - 1]->section;
3587
3588 for (; sec != NULL; sec = sec->next)
3589 {
3590 if (sec->vma > ent)
3591 break;
3592 /* SEC_LOAD may not be set if SEC is from a separate debug
3593 info file. */
3594 if ((sec->flags & SEC_ALLOC) == 0)
3595 break;
3596 if ((sec->flags & SEC_CODE) != 0)
3597 s->section = sec;
3598 }
3599 s->flags |= BSF_SYNTHETIC;
3600 s->value = ent - s->section->vma;
3601 s->name = names;
3602 *names++ = '.';
3603 len = strlen (syms[i]->name);
3604 memcpy (names, syms[i]->name, len + 1);
3605 names += len + 1;
3606 /* Have udata.p point back to the original symbol this
3607 synthetic symbol was derived from. */
3608 s->udata.p = syms[i];
3609 s++;
3610 }
3611 }
3612 free (contents);
3613
3614 if (glink != NULL && relplt != NULL)
3615 {
3616 if (resolv_vma)
3617 {
3618 /* Add a symbol for the main glink trampoline. */
3619 memset (s, 0, sizeof *s);
3620 s->the_bfd = abfd;
3621 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3622 s->section = glink;
3623 s->value = resolv_vma - glink->vma;
3624 s->name = names;
3625 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3626 names += sizeof ("__glink_PLTresolve");
3627 s++;
3628 count++;
3629 }
3630
3631 /* FIXME: It would be very much nicer to put sym@plt on the
3632 stub rather than on the glink branch table entry. The
3633 objdump disassembler would then use a sensible symbol
3634 name on plt calls. The difficulty in doing so is
3635 a) finding the stubs, and,
3636 b) matching stubs against plt entries, and,
3637 c) there can be multiple stubs for a given plt entry.
3638
3639 Solving (a) could be done by code scanning, but older
3640 ppc64 binaries used different stubs to current code.
3641 (b) is the tricky one since you need to known the toc
3642 pointer for at least one function that uses a pic stub to
3643 be able to calculate the plt address referenced.
3644 (c) means gdb would need to set multiple breakpoints (or
3645 find the glink branch itself) when setting breakpoints
3646 for pending shared library loads. */
3647 p = relplt->relocation;
3648 for (i = 0; i < plt_count; i++, p++)
3649 {
3650 size_t len;
3651
3652 *s = **p->sym_ptr_ptr;
3653 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
3654 we are defining a symbol, ensure one of them is set. */
3655 if ((s->flags & BSF_LOCAL) == 0)
3656 s->flags |= BSF_GLOBAL;
3657 s->flags |= BSF_SYNTHETIC;
3658 s->section = glink;
3659 s->value = glink_vma - glink->vma;
3660 s->name = names;
3661 s->udata.p = NULL;
3662 len = strlen ((*p->sym_ptr_ptr)->name);
3663 memcpy (names, (*p->sym_ptr_ptr)->name, len);
3664 names += len;
3665 if (p->addend != 0)
3666 {
3667 memcpy (names, "+0x", sizeof ("+0x") - 1);
3668 names += sizeof ("+0x") - 1;
3669 bfd_sprintf_vma (abfd, names, p->addend);
3670 names += strlen (names);
3671 }
3672 memcpy (names, "@plt", sizeof ("@plt"));
3673 names += sizeof ("@plt");
3674 s++;
3675 if (abi < 2)
3676 {
3677 glink_vma += 8;
3678 if (i >= 0x8000)
3679 glink_vma += 4;
3680 }
3681 else
3682 glink_vma += 4;
3683 }
3684 count += plt_count;
3685 }
3686 }
3687
3688 done:
3689 free (syms);
3690 return count;
3691 }
3692 \f
3693 /* The following functions are specific to the ELF linker, while
3694 functions above are used generally. Those named ppc64_elf_* are
3695 called by the main ELF linker code. They appear in this file more
3696 or less in the order in which they are called. eg.
3697 ppc64_elf_check_relocs is called early in the link process,
3698 ppc64_elf_finish_dynamic_sections is one of the last functions
3699 called.
3700
3701 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
3702 functions have both a function code symbol and a function descriptor
3703 symbol. A call to foo in a relocatable object file looks like:
3704
3705 . .text
3706 . x:
3707 . bl .foo
3708 . nop
3709
3710 The function definition in another object file might be:
3711
3712 . .section .opd
3713 . foo: .quad .foo
3714 . .quad .TOC.@tocbase
3715 . .quad 0
3716 .
3717 . .text
3718 . .foo: blr
3719
3720 When the linker resolves the call during a static link, the branch
3721 unsurprisingly just goes to .foo and the .opd information is unused.
3722 If the function definition is in a shared library, things are a little
3723 different: The call goes via a plt call stub, the opd information gets
3724 copied to the plt, and the linker patches the nop.
3725
3726 . x:
3727 . bl .foo_stub
3728 . ld 2,40(1)
3729 .
3730 .
3731 . .foo_stub:
3732 . std 2,40(1) # in practice, the call stub
3733 . addis 11,2,Lfoo@toc@ha # is slightly optimized, but
3734 . addi 11,11,Lfoo@toc@l # this is the general idea
3735 . ld 12,0(11)
3736 . ld 2,8(11)
3737 . mtctr 12
3738 . ld 11,16(11)
3739 . bctr
3740 .
3741 . .section .plt
3742 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
3743
3744 The "reloc ()" notation is supposed to indicate that the linker emits
3745 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
3746 copying.
3747
3748 What are the difficulties here? Well, firstly, the relocations
3749 examined by the linker in check_relocs are against the function code
3750 sym .foo, while the dynamic relocation in the plt is emitted against
3751 the function descriptor symbol, foo. Somewhere along the line, we need
3752 to carefully copy dynamic link information from one symbol to the other.
3753 Secondly, the generic part of the elf linker will make .foo a dynamic
3754 symbol as is normal for most other backends. We need foo dynamic
3755 instead, at least for an application final link. However, when
3756 creating a shared library containing foo, we need to have both symbols
3757 dynamic so that references to .foo are satisfied during the early
3758 stages of linking. Otherwise the linker might decide to pull in a
3759 definition from some other object, eg. a static library.
3760
3761 Update: As of August 2004, we support a new convention. Function
3762 calls may use the function descriptor symbol, ie. "bl foo". This
3763 behaves exactly as "bl .foo". */
3764
3765 /* Of those relocs that might be copied as dynamic relocs, this function
3766 selects those that must be copied when linking a shared library,
3767 even when the symbol is local. */
3768
3769 static int
3770 must_be_dyn_reloc (struct bfd_link_info *info,
3771 enum elf_ppc64_reloc_type r_type)
3772 {
3773 switch (r_type)
3774 {
3775 default:
3776 return 1;
3777
3778 case R_PPC64_REL32:
3779 case R_PPC64_REL64:
3780 case R_PPC64_REL30:
3781 return 0;
3782
3783 case R_PPC64_TPREL16:
3784 case R_PPC64_TPREL16_LO:
3785 case R_PPC64_TPREL16_HI:
3786 case R_PPC64_TPREL16_HA:
3787 case R_PPC64_TPREL16_DS:
3788 case R_PPC64_TPREL16_LO_DS:
3789 case R_PPC64_TPREL16_HIGH:
3790 case R_PPC64_TPREL16_HIGHA:
3791 case R_PPC64_TPREL16_HIGHER:
3792 case R_PPC64_TPREL16_HIGHERA:
3793 case R_PPC64_TPREL16_HIGHEST:
3794 case R_PPC64_TPREL16_HIGHESTA:
3795 case R_PPC64_TPREL64:
3796 return !bfd_link_executable (info);
3797 }
3798 }
3799
3800 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3801 copying dynamic variables from a shared lib into an app's dynbss
3802 section, and instead use a dynamic relocation to point into the
3803 shared lib. With code that gcc generates, it's vital that this be
3804 enabled; In the PowerPC64 ABI, the address of a function is actually
3805 the address of a function descriptor, which resides in the .opd
3806 section. gcc uses the descriptor directly rather than going via the
3807 GOT as some other ABI's do, which means that initialized function
3808 pointers must reference the descriptor. Thus, a function pointer
3809 initialized to the address of a function in a shared library will
3810 either require a copy reloc, or a dynamic reloc. Using a copy reloc
3811 redefines the function descriptor symbol to point to the copy. This
3812 presents a problem as a plt entry for that function is also
3813 initialized from the function descriptor symbol and the copy reloc
3814 may not be initialized first. */
3815 #define ELIMINATE_COPY_RELOCS 1
3816
3817 /* Section name for stubs is the associated section name plus this
3818 string. */
3819 #define STUB_SUFFIX ".stub"
3820
3821 /* Linker stubs.
3822 ppc_stub_long_branch:
3823 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
3824 destination, but a 24 bit branch in a stub section will reach.
3825 . b dest
3826
3827 ppc_stub_plt_branch:
3828 Similar to the above, but a 24 bit branch in the stub section won't
3829 reach its destination.
3830 . addis %r11,%r2,xxx@toc@ha
3831 . ld %r12,xxx@toc@l(%r11)
3832 . mtctr %r12
3833 . bctr
3834
3835 ppc_stub_plt_call:
3836 Used to call a function in a shared library. If it so happens that
3837 the plt entry referenced crosses a 64k boundary, then an extra
3838 "addi %r11,%r11,xxx@toc@l" will be inserted before the "mtctr".
3839 . std %r2,40(%r1)
3840 . addis %r11,%r2,xxx@toc@ha
3841 . ld %r12,xxx+0@toc@l(%r11)
3842 . mtctr %r12
3843 . ld %r2,xxx+8@toc@l(%r11)
3844 . ld %r11,xxx+16@toc@l(%r11)
3845 . bctr
3846
3847 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
3848 code to adjust the value and save r2 to support multiple toc sections.
3849 A ppc_stub_long_branch with an r2 offset looks like:
3850 . std %r2,40(%r1)
3851 . addis %r2,%r2,off@ha
3852 . addi %r2,%r2,off@l
3853 . b dest
3854
3855 A ppc_stub_plt_branch with an r2 offset looks like:
3856 . std %r2,40(%r1)
3857 . addis %r11,%r2,xxx@toc@ha
3858 . ld %r12,xxx@toc@l(%r11)
3859 . addis %r2,%r2,off@ha
3860 . addi %r2,%r2,off@l
3861 . mtctr %r12
3862 . bctr
3863
3864 In cases where the "addis" instruction would add zero, the "addis" is
3865 omitted and following instructions modified slightly in some cases.
3866 */
3867
3868 enum ppc_stub_type {
3869 ppc_stub_none,
3870 ppc_stub_long_branch,
3871 ppc_stub_long_branch_r2off,
3872 ppc_stub_plt_branch,
3873 ppc_stub_plt_branch_r2off,
3874 ppc_stub_plt_call,
3875 ppc_stub_plt_call_r2save,
3876 ppc_stub_global_entry,
3877 ppc_stub_save_res
3878 };
3879
3880 /* Information on stub grouping. */
3881 struct map_stub
3882 {
3883 /* The stub section. */
3884 asection *stub_sec;
3885 /* This is the section to which stubs in the group will be attached. */
3886 asection *link_sec;
3887 /* Next group. */
3888 struct map_stub *next;
3889 /* Whether to emit a copy of register save/restore functions in this
3890 group. */
3891 int needs_save_res;
3892 };
3893
3894 struct ppc_stub_hash_entry {
3895
3896 /* Base hash table entry structure. */
3897 struct bfd_hash_entry root;
3898
3899 enum ppc_stub_type stub_type;
3900
3901 /* Group information. */
3902 struct map_stub *group;
3903
3904 /* Offset within stub_sec of the beginning of this stub. */
3905 bfd_vma stub_offset;
3906
3907 /* Given the symbol's value and its section we can determine its final
3908 value when building the stubs (so the stub knows where to jump. */
3909 bfd_vma target_value;
3910 asection *target_section;
3911
3912 /* The symbol table entry, if any, that this was derived from. */
3913 struct ppc_link_hash_entry *h;
3914 struct plt_entry *plt_ent;
3915
3916 /* Symbol st_other. */
3917 unsigned char other;
3918 };
3919
3920 struct ppc_branch_hash_entry {
3921
3922 /* Base hash table entry structure. */
3923 struct bfd_hash_entry root;
3924
3925 /* Offset within branch lookup table. */
3926 unsigned int offset;
3927
3928 /* Generation marker. */
3929 unsigned int iter;
3930 };
3931
3932 /* Used to track dynamic relocations for local symbols. */
3933 struct ppc_dyn_relocs
3934 {
3935 struct ppc_dyn_relocs *next;
3936
3937 /* The input section of the reloc. */
3938 asection *sec;
3939
3940 /* Total number of relocs copied for the input section. */
3941 unsigned int count : 31;
3942
3943 /* Whether this entry is for STT_GNU_IFUNC symbols. */
3944 unsigned int ifunc : 1;
3945 };
3946
3947 struct ppc_link_hash_entry
3948 {
3949 struct elf_link_hash_entry elf;
3950
3951 union {
3952 /* A pointer to the most recently used stub hash entry against this
3953 symbol. */
3954 struct ppc_stub_hash_entry *stub_cache;
3955
3956 /* A pointer to the next symbol starting with a '.' */
3957 struct ppc_link_hash_entry *next_dot_sym;
3958 } u;
3959
3960 /* Track dynamic relocs copied for this symbol. */
3961 struct elf_dyn_relocs *dyn_relocs;
3962
3963 /* Chain of aliases referring to a weakdef. */
3964 struct ppc_link_hash_entry *weakref;
3965
3966 /* Link between function code and descriptor symbols. */
3967 struct ppc_link_hash_entry *oh;
3968
3969 /* Flag function code and descriptor symbols. */
3970 unsigned int is_func:1;
3971 unsigned int is_func_descriptor:1;
3972 unsigned int fake:1;
3973
3974 /* Whether global opd/toc sym has been adjusted or not.
3975 After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
3976 should be set for all globals defined in any opd/toc section. */
3977 unsigned int adjust_done:1;
3978
3979 /* Set if we twiddled this symbol to weak at some stage. */
3980 unsigned int was_undefined:1;
3981
3982 /* Set if this is an out-of-line register save/restore function,
3983 with non-standard calling convention. */
3984 unsigned int save_res:1;
3985
3986 /* Contexts in which symbol is used in the GOT (or TOC).
3987 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
3988 corresponding relocs are encountered during check_relocs.
3989 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3990 indicate the corresponding GOT entry type is not needed.
3991 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
3992 a TPREL one. We use a separate flag rather than setting TPREL
3993 just for convenience in distinguishing the two cases. */
3994 #define TLS_GD 1 /* GD reloc. */
3995 #define TLS_LD 2 /* LD reloc. */
3996 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3997 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3998 #define TLS_TLS 16 /* Any TLS reloc. */
3999 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
4000 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
4001 #define PLT_IFUNC 128 /* STT_GNU_IFUNC. */
4002 unsigned char tls_mask;
4003 };
4004
4005 /* ppc64 ELF linker hash table. */
4006
4007 struct ppc_link_hash_table
4008 {
4009 struct elf_link_hash_table elf;
4010
4011 /* The stub hash table. */
4012 struct bfd_hash_table stub_hash_table;
4013
4014 /* Another hash table for plt_branch stubs. */
4015 struct bfd_hash_table branch_hash_table;
4016
4017 /* Hash table for function prologue tocsave. */
4018 htab_t tocsave_htab;
4019
4020 /* Various options and other info passed from the linker. */
4021 struct ppc64_elf_params *params;
4022
4023 /* The size of sec_info below. */
4024 unsigned int sec_info_arr_size;
4025
4026 /* Per-section array of extra section info. Done this way rather
4027 than as part of ppc64_elf_section_data so we have the info for
4028 non-ppc64 sections. */
4029 struct
4030 {
4031 /* Along with elf_gp, specifies the TOC pointer used by this section. */
4032 bfd_vma toc_off;
4033
4034 union
4035 {
4036 /* The section group that this section belongs to. */
4037 struct map_stub *group;
4038 /* A temp section list pointer. */
4039 asection *list;
4040 } u;
4041 } *sec_info;
4042
4043 /* Linked list of groups. */
4044 struct map_stub *group;
4045
4046 /* Temp used when calculating TOC pointers. */
4047 bfd_vma toc_curr;
4048 bfd *toc_bfd;
4049 asection *toc_first_sec;
4050
4051 /* Used when adding symbols. */
4052 struct ppc_link_hash_entry *dot_syms;
4053
4054 /* Shortcuts to get to dynamic linker sections. */
4055 asection *dynbss;
4056 asection *relbss;
4057 asection *glink;
4058 asection *sfpr;
4059 asection *brlt;
4060 asection *relbrlt;
4061 asection *glink_eh_frame;
4062
4063 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
4064 struct ppc_link_hash_entry *tls_get_addr;
4065 struct ppc_link_hash_entry *tls_get_addr_fd;
4066
4067 /* The size of reliplt used by got entry relocs. */
4068 bfd_size_type got_reli_size;
4069
4070 /* Statistics. */
4071 unsigned long stub_count[ppc_stub_global_entry];
4072
4073 /* Number of stubs against global syms. */
4074 unsigned long stub_globals;
4075
4076 /* Set if we're linking code with function descriptors. */
4077 unsigned int opd_abi:1;
4078
4079 /* Support for multiple toc sections. */
4080 unsigned int do_multi_toc:1;
4081 unsigned int multi_toc_needed:1;
4082 unsigned int second_toc_pass:1;
4083 unsigned int do_toc_opt:1;
4084
4085 /* Set on error. */
4086 unsigned int stub_error:1;
4087
4088 /* Temp used by ppc64_elf_before_check_relocs. */
4089 unsigned int twiddled_syms:1;
4090
4091 /* Incremented every time we size stubs. */
4092 unsigned int stub_iteration;
4093
4094 /* Small local sym cache. */
4095 struct sym_cache sym_cache;
4096 };
4097
4098 /* Rename some of the generic section flags to better document how they
4099 are used here. */
4100
4101 /* Nonzero if this section has TLS related relocations. */
4102 #define has_tls_reloc sec_flg0
4103
4104 /* Nonzero if this section has a call to __tls_get_addr. */
4105 #define has_tls_get_addr_call sec_flg1
4106
4107 /* Nonzero if this section has any toc or got relocs. */
4108 #define has_toc_reloc sec_flg2
4109
4110 /* Nonzero if this section has a call to another section that uses
4111 the toc or got. */
4112 #define makes_toc_func_call sec_flg3
4113
4114 /* Recursion protection when determining above flag. */
4115 #define call_check_in_progress sec_flg4
4116 #define call_check_done sec_flg5
4117
4118 /* Get the ppc64 ELF linker hash table from a link_info structure. */
4119
4120 #define ppc_hash_table(p) \
4121 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
4122 == PPC64_ELF_DATA ? ((struct ppc_link_hash_table *) ((p)->hash)) : NULL)
4123
4124 #define ppc_stub_hash_lookup(table, string, create, copy) \
4125 ((struct ppc_stub_hash_entry *) \
4126 bfd_hash_lookup ((table), (string), (create), (copy)))
4127
4128 #define ppc_branch_hash_lookup(table, string, create, copy) \
4129 ((struct ppc_branch_hash_entry *) \
4130 bfd_hash_lookup ((table), (string), (create), (copy)))
4131
4132 /* Create an entry in the stub hash table. */
4133
4134 static struct bfd_hash_entry *
4135 stub_hash_newfunc (struct bfd_hash_entry *entry,
4136 struct bfd_hash_table *table,
4137 const char *string)
4138 {
4139 /* Allocate the structure if it has not already been allocated by a
4140 subclass. */
4141 if (entry == NULL)
4142 {
4143 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
4144 if (entry == NULL)
4145 return entry;
4146 }
4147
4148 /* Call the allocation method of the superclass. */
4149 entry = bfd_hash_newfunc (entry, table, string);
4150 if (entry != NULL)
4151 {
4152 struct ppc_stub_hash_entry *eh;
4153
4154 /* Initialize the local fields. */
4155 eh = (struct ppc_stub_hash_entry *) entry;
4156 eh->stub_type = ppc_stub_none;
4157 eh->group = NULL;
4158 eh->stub_offset = 0;
4159 eh->target_value = 0;
4160 eh->target_section = NULL;
4161 eh->h = NULL;
4162 eh->plt_ent = NULL;
4163 eh->other = 0;
4164 }
4165
4166 return entry;
4167 }
4168
4169 /* Create an entry in the branch hash table. */
4170
4171 static struct bfd_hash_entry *
4172 branch_hash_newfunc (struct bfd_hash_entry *entry,
4173 struct bfd_hash_table *table,
4174 const char *string)
4175 {
4176 /* Allocate the structure if it has not already been allocated by a
4177 subclass. */
4178 if (entry == NULL)
4179 {
4180 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
4181 if (entry == NULL)
4182 return entry;
4183 }
4184
4185 /* Call the allocation method of the superclass. */
4186 entry = bfd_hash_newfunc (entry, table, string);
4187 if (entry != NULL)
4188 {
4189 struct ppc_branch_hash_entry *eh;
4190
4191 /* Initialize the local fields. */
4192 eh = (struct ppc_branch_hash_entry *) entry;
4193 eh->offset = 0;
4194 eh->iter = 0;
4195 }
4196
4197 return entry;
4198 }
4199
4200 /* Create an entry in a ppc64 ELF linker hash table. */
4201
4202 static struct bfd_hash_entry *
4203 link_hash_newfunc (struct bfd_hash_entry *entry,
4204 struct bfd_hash_table *table,
4205 const char *string)
4206 {
4207 /* Allocate the structure if it has not already been allocated by a
4208 subclass. */
4209 if (entry == NULL)
4210 {
4211 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
4212 if (entry == NULL)
4213 return entry;
4214 }
4215
4216 /* Call the allocation method of the superclass. */
4217 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
4218 if (entry != NULL)
4219 {
4220 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
4221
4222 memset (&eh->u.stub_cache, 0,
4223 (sizeof (struct ppc_link_hash_entry)
4224 - offsetof (struct ppc_link_hash_entry, u.stub_cache)));
4225
4226 /* When making function calls, old ABI code references function entry
4227 points (dot symbols), while new ABI code references the function
4228 descriptor symbol. We need to make any combination of reference and
4229 definition work together, without breaking archive linking.
4230
4231 For a defined function "foo" and an undefined call to "bar":
4232 An old object defines "foo" and ".foo", references ".bar" (possibly
4233 "bar" too).
4234 A new object defines "foo" and references "bar".
4235
4236 A new object thus has no problem with its undefined symbols being
4237 satisfied by definitions in an old object. On the other hand, the
4238 old object won't have ".bar" satisfied by a new object.
4239
4240 Keep a list of newly added dot-symbols. */
4241
4242 if (string[0] == '.')
4243 {
4244 struct ppc_link_hash_table *htab;
4245
4246 htab = (struct ppc_link_hash_table *) table;
4247 eh->u.next_dot_sym = htab->dot_syms;
4248 htab->dot_syms = eh;
4249 }
4250 }
4251
4252 return entry;
4253 }
4254
4255 struct tocsave_entry {
4256 asection *sec;
4257 bfd_vma offset;
4258 };
4259
4260 static hashval_t
4261 tocsave_htab_hash (const void *p)
4262 {
4263 const struct tocsave_entry *e = (const struct tocsave_entry *) p;
4264 return ((bfd_vma)(intptr_t) e->sec ^ e->offset) >> 3;
4265 }
4266
4267 static int
4268 tocsave_htab_eq (const void *p1, const void *p2)
4269 {
4270 const struct tocsave_entry *e1 = (const struct tocsave_entry *) p1;
4271 const struct tocsave_entry *e2 = (const struct tocsave_entry *) p2;
4272 return e1->sec == e2->sec && e1->offset == e2->offset;
4273 }
4274
4275 /* Destroy a ppc64 ELF linker hash table. */
4276
4277 static void
4278 ppc64_elf_link_hash_table_free (bfd *obfd)
4279 {
4280 struct ppc_link_hash_table *htab;
4281
4282 htab = (struct ppc_link_hash_table *) obfd->link.hash;
4283 if (htab->tocsave_htab)
4284 htab_delete (htab->tocsave_htab);
4285 bfd_hash_table_free (&htab->branch_hash_table);
4286 bfd_hash_table_free (&htab->stub_hash_table);
4287 _bfd_elf_link_hash_table_free (obfd);
4288 }
4289
4290 /* Create a ppc64 ELF linker hash table. */
4291
4292 static struct bfd_link_hash_table *
4293 ppc64_elf_link_hash_table_create (bfd *abfd)
4294 {
4295 struct ppc_link_hash_table *htab;
4296 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
4297
4298 htab = bfd_zmalloc (amt);
4299 if (htab == NULL)
4300 return NULL;
4301
4302 if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc,
4303 sizeof (struct ppc_link_hash_entry),
4304 PPC64_ELF_DATA))
4305 {
4306 free (htab);
4307 return NULL;
4308 }
4309
4310 /* Init the stub hash table too. */
4311 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc,
4312 sizeof (struct ppc_stub_hash_entry)))
4313 {
4314 _bfd_elf_link_hash_table_free (abfd);
4315 return NULL;
4316 }
4317
4318 /* And the branch hash table. */
4319 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc,
4320 sizeof (struct ppc_branch_hash_entry)))
4321 {
4322 bfd_hash_table_free (&htab->stub_hash_table);
4323 _bfd_elf_link_hash_table_free (abfd);
4324 return NULL;
4325 }
4326
4327 htab->tocsave_htab = htab_try_create (1024,
4328 tocsave_htab_hash,
4329 tocsave_htab_eq,
4330 NULL);
4331 if (htab->tocsave_htab == NULL)
4332 {
4333 ppc64_elf_link_hash_table_free (abfd);
4334 return NULL;
4335 }
4336 htab->elf.root.hash_table_free = ppc64_elf_link_hash_table_free;
4337
4338 /* Initializing two fields of the union is just cosmetic. We really
4339 only care about glist, but when compiled on a 32-bit host the
4340 bfd_vma fields are larger. Setting the bfd_vma to zero makes
4341 debugger inspection of these fields look nicer. */
4342 htab->elf.init_got_refcount.refcount = 0;
4343 htab->elf.init_got_refcount.glist = NULL;
4344 htab->elf.init_plt_refcount.refcount = 0;
4345 htab->elf.init_plt_refcount.glist = NULL;
4346 htab->elf.init_got_offset.offset = 0;
4347 htab->elf.init_got_offset.glist = NULL;
4348 htab->elf.init_plt_offset.offset = 0;
4349 htab->elf.init_plt_offset.glist = NULL;
4350
4351 return &htab->elf.root;
4352 }
4353
4354 /* Create sections for linker generated code. */
4355
4356 static bfd_boolean
4357 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
4358 {
4359 struct ppc_link_hash_table *htab;
4360 flagword flags;
4361
4362 htab = ppc_hash_table (info);
4363
4364 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
4365 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4366 if (htab->params->save_restore_funcs)
4367 {
4368 /* Create .sfpr for code to save and restore fp regs. */
4369 htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr",
4370 flags);
4371 if (htab->sfpr == NULL
4372 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
4373 return FALSE;
4374 }
4375
4376 if (bfd_link_relocatable (info))
4377 return TRUE;
4378
4379 /* Create .glink for lazy dynamic linking support. */
4380 htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink",
4381 flags);
4382 if (htab->glink == NULL
4383 || ! bfd_set_section_alignment (dynobj, htab->glink, 3))
4384 return FALSE;
4385
4386 if (!info->no_ld_generated_unwind_info)
4387 {
4388 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
4389 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4390 htab->glink_eh_frame = bfd_make_section_anyway_with_flags (dynobj,
4391 ".eh_frame",
4392 flags);
4393 if (htab->glink_eh_frame == NULL
4394 || !bfd_set_section_alignment (dynobj, htab->glink_eh_frame, 2))
4395 return FALSE;
4396 }
4397
4398 flags = SEC_ALLOC | SEC_LINKER_CREATED;
4399 htab->elf.iplt = bfd_make_section_anyway_with_flags (dynobj, ".iplt", flags);
4400 if (htab->elf.iplt == NULL
4401 || ! bfd_set_section_alignment (dynobj, htab->elf.iplt, 3))
4402 return FALSE;
4403
4404 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4405 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4406 htab->elf.irelplt
4407 = bfd_make_section_anyway_with_flags (dynobj, ".rela.iplt", flags);
4408 if (htab->elf.irelplt == NULL
4409 || ! bfd_set_section_alignment (dynobj, htab->elf.irelplt, 3))
4410 return FALSE;
4411
4412 /* Create branch lookup table for plt_branch stubs. */
4413 flags = (SEC_ALLOC | SEC_LOAD
4414 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4415 htab->brlt = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt",
4416 flags);
4417 if (htab->brlt == NULL
4418 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
4419 return FALSE;
4420
4421 if (!bfd_link_pic (info))
4422 return TRUE;
4423
4424 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4425 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4426 htab->relbrlt = bfd_make_section_anyway_with_flags (dynobj,
4427 ".rela.branch_lt",
4428 flags);
4429 if (htab->relbrlt == NULL
4430 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
4431 return FALSE;
4432
4433 return TRUE;
4434 }
4435
4436 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
4437
4438 bfd_boolean
4439 ppc64_elf_init_stub_bfd (struct bfd_link_info *info,
4440 struct ppc64_elf_params *params)
4441 {
4442 struct ppc_link_hash_table *htab;
4443
4444 elf_elfheader (params->stub_bfd)->e_ident[EI_CLASS] = ELFCLASS64;
4445
4446 /* Always hook our dynamic sections into the first bfd, which is the
4447 linker created stub bfd. This ensures that the GOT header is at
4448 the start of the output TOC section. */
4449 htab = ppc_hash_table (info);
4450 htab->elf.dynobj = params->stub_bfd;
4451 htab->params = params;
4452
4453 return create_linkage_sections (htab->elf.dynobj, info);
4454 }
4455
4456 /* Build a name for an entry in the stub hash table. */
4457
4458 static char *
4459 ppc_stub_name (const asection *input_section,
4460 const asection *sym_sec,
4461 const struct ppc_link_hash_entry *h,
4462 const Elf_Internal_Rela *rel)
4463 {
4464 char *stub_name;
4465 ssize_t len;
4466
4467 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
4468 offsets from a sym as a branch target? In fact, we could
4469 probably assume the addend is always zero. */
4470 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
4471
4472 if (h)
4473 {
4474 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
4475 stub_name = bfd_malloc (len);
4476 if (stub_name == NULL)
4477 return stub_name;
4478
4479 len = sprintf (stub_name, "%08x.%s+%x",
4480 input_section->id & 0xffffffff,
4481 h->elf.root.root.string,
4482 (int) rel->r_addend & 0xffffffff);
4483 }
4484 else
4485 {
4486 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
4487 stub_name = bfd_malloc (len);
4488 if (stub_name == NULL)
4489 return stub_name;
4490
4491 len = sprintf (stub_name, "%08x.%x:%x+%x",
4492 input_section->id & 0xffffffff,
4493 sym_sec->id & 0xffffffff,
4494 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
4495 (int) rel->r_addend & 0xffffffff);
4496 }
4497 if (len > 2 && stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
4498 stub_name[len - 2] = 0;
4499 return stub_name;
4500 }
4501
4502 /* Look up an entry in the stub hash. Stub entries are cached because
4503 creating the stub name takes a bit of time. */
4504
4505 static struct ppc_stub_hash_entry *
4506 ppc_get_stub_entry (const asection *input_section,
4507 const asection *sym_sec,
4508 struct ppc_link_hash_entry *h,
4509 const Elf_Internal_Rela *rel,
4510 struct ppc_link_hash_table *htab)
4511 {
4512 struct ppc_stub_hash_entry *stub_entry;
4513 struct map_stub *group;
4514
4515 /* If this input section is part of a group of sections sharing one
4516 stub section, then use the id of the first section in the group.
4517 Stub names need to include a section id, as there may well be
4518 more than one stub used to reach say, printf, and we need to
4519 distinguish between them. */
4520 group = htab->sec_info[input_section->id].u.group;
4521 if (group == NULL)
4522 return NULL;
4523
4524 if (h != NULL && h->u.stub_cache != NULL
4525 && h->u.stub_cache->h == h
4526 && h->u.stub_cache->group == group)
4527 {
4528 stub_entry = h->u.stub_cache;
4529 }
4530 else
4531 {
4532 char *stub_name;
4533
4534 stub_name = ppc_stub_name (group->link_sec, sym_sec, h, rel);
4535 if (stub_name == NULL)
4536 return NULL;
4537
4538 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
4539 stub_name, FALSE, FALSE);
4540 if (h != NULL)
4541 h->u.stub_cache = stub_entry;
4542
4543 free (stub_name);
4544 }
4545
4546 return stub_entry;
4547 }
4548
4549 /* Add a new stub entry to the stub hash. Not all fields of the new
4550 stub entry are initialised. */
4551
4552 static struct ppc_stub_hash_entry *
4553 ppc_add_stub (const char *stub_name,
4554 asection *section,
4555 struct bfd_link_info *info)
4556 {
4557 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4558 struct map_stub *group;
4559 asection *link_sec;
4560 asection *stub_sec;
4561 struct ppc_stub_hash_entry *stub_entry;
4562
4563 group = htab->sec_info[section->id].u.group;
4564 link_sec = group->link_sec;
4565 stub_sec = group->stub_sec;
4566 if (stub_sec == NULL)
4567 {
4568 size_t namelen;
4569 bfd_size_type len;
4570 char *s_name;
4571
4572 namelen = strlen (link_sec->name);
4573 len = namelen + sizeof (STUB_SUFFIX);
4574 s_name = bfd_alloc (htab->params->stub_bfd, len);
4575 if (s_name == NULL)
4576 return NULL;
4577
4578 memcpy (s_name, link_sec->name, namelen);
4579 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
4580 stub_sec = (*htab->params->add_stub_section) (s_name, link_sec);
4581 if (stub_sec == NULL)
4582 return NULL;
4583 group->stub_sec = stub_sec;
4584 }
4585
4586 /* Enter this entry into the linker stub hash table. */
4587 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
4588 TRUE, FALSE);
4589 if (stub_entry == NULL)
4590 {
4591 info->callbacks->einfo (_("%P: %B: cannot create stub entry %s\n"),
4592 section->owner, stub_name);
4593 return NULL;
4594 }
4595
4596 stub_entry->group = group;
4597 stub_entry->stub_offset = 0;
4598 return stub_entry;
4599 }
4600
4601 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
4602 not already done. */
4603
4604 static bfd_boolean
4605 create_got_section (bfd *abfd, struct bfd_link_info *info)
4606 {
4607 asection *got, *relgot;
4608 flagword flags;
4609 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4610
4611 if (!is_ppc64_elf (abfd))
4612 return FALSE;
4613 if (htab == NULL)
4614 return FALSE;
4615
4616 if (!htab->elf.sgot
4617 && !_bfd_elf_create_got_section (htab->elf.dynobj, info))
4618 return FALSE;
4619
4620 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
4621 | SEC_LINKER_CREATED);
4622
4623 got = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
4624 if (!got
4625 || !bfd_set_section_alignment (abfd, got, 3))
4626 return FALSE;
4627
4628 relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got",
4629 flags | SEC_READONLY);
4630 if (!relgot
4631 || ! bfd_set_section_alignment (abfd, relgot, 3))
4632 return FALSE;
4633
4634 ppc64_elf_tdata (abfd)->got = got;
4635 ppc64_elf_tdata (abfd)->relgot = relgot;
4636 return TRUE;
4637 }
4638
4639 /* Create the dynamic sections, and set up shortcuts. */
4640
4641 static bfd_boolean
4642 ppc64_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
4643 {
4644 struct ppc_link_hash_table *htab;
4645
4646 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
4647 return FALSE;
4648
4649 htab = ppc_hash_table (info);
4650 if (htab == NULL)
4651 return FALSE;
4652
4653 htab->dynbss = bfd_get_linker_section (dynobj, ".dynbss");
4654 if (!bfd_link_pic (info))
4655 htab->relbss = bfd_get_linker_section (dynobj, ".rela.bss");
4656
4657 if (!htab->elf.sgot || !htab->elf.splt || !htab->elf.srelplt || !htab->dynbss
4658 || (!bfd_link_pic (info) && !htab->relbss))
4659 abort ();
4660
4661 return TRUE;
4662 }
4663
4664 /* Follow indirect and warning symbol links. */
4665
4666 static inline struct bfd_link_hash_entry *
4667 follow_link (struct bfd_link_hash_entry *h)
4668 {
4669 while (h->type == bfd_link_hash_indirect
4670 || h->type == bfd_link_hash_warning)
4671 h = h->u.i.link;
4672 return h;
4673 }
4674
4675 static inline struct elf_link_hash_entry *
4676 elf_follow_link (struct elf_link_hash_entry *h)
4677 {
4678 return (struct elf_link_hash_entry *) follow_link (&h->root);
4679 }
4680
4681 static inline struct ppc_link_hash_entry *
4682 ppc_follow_link (struct ppc_link_hash_entry *h)
4683 {
4684 return (struct ppc_link_hash_entry *) follow_link (&h->elf.root);
4685 }
4686
4687 /* Merge PLT info on FROM with that on TO. */
4688
4689 static void
4690 move_plt_plist (struct ppc_link_hash_entry *from,
4691 struct ppc_link_hash_entry *to)
4692 {
4693 if (from->elf.plt.plist != NULL)
4694 {
4695 if (to->elf.plt.plist != NULL)
4696 {
4697 struct plt_entry **entp;
4698 struct plt_entry *ent;
4699
4700 for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; )
4701 {
4702 struct plt_entry *dent;
4703
4704 for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next)
4705 if (dent->addend == ent->addend)
4706 {
4707 dent->plt.refcount += ent->plt.refcount;
4708 *entp = ent->next;
4709 break;
4710 }
4711 if (dent == NULL)
4712 entp = &ent->next;
4713 }
4714 *entp = to->elf.plt.plist;
4715 }
4716
4717 to->elf.plt.plist = from->elf.plt.plist;
4718 from->elf.plt.plist = NULL;
4719 }
4720 }
4721
4722 /* Copy the extra info we tack onto an elf_link_hash_entry. */
4723
4724 static void
4725 ppc64_elf_copy_indirect_symbol (struct bfd_link_info *info,
4726 struct elf_link_hash_entry *dir,
4727 struct elf_link_hash_entry *ind)
4728 {
4729 struct ppc_link_hash_entry *edir, *eind;
4730
4731 edir = (struct ppc_link_hash_entry *) dir;
4732 eind = (struct ppc_link_hash_entry *) ind;
4733
4734 edir->is_func |= eind->is_func;
4735 edir->is_func_descriptor |= eind->is_func_descriptor;
4736 edir->tls_mask |= eind->tls_mask;
4737 if (eind->oh != NULL)
4738 edir->oh = ppc_follow_link (eind->oh);
4739
4740 /* If called to transfer flags for a weakdef during processing
4741 of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF.
4742 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
4743 if (!(ELIMINATE_COPY_RELOCS
4744 && eind->elf.root.type != bfd_link_hash_indirect
4745 && edir->elf.dynamic_adjusted))
4746 edir->elf.non_got_ref |= eind->elf.non_got_ref;
4747
4748 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
4749 edir->elf.ref_regular |= eind->elf.ref_regular;
4750 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
4751 edir->elf.needs_plt |= eind->elf.needs_plt;
4752 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed;
4753
4754 /* If we were called to copy over info for a weak sym, don't copy
4755 dyn_relocs, plt/got info, or dynindx. We used to copy dyn_relocs
4756 in order to simplify readonly_dynrelocs and save a field in the
4757 symbol hash entry, but that means dyn_relocs can't be used in any
4758 tests about a specific symbol, or affect other symbol flags which
4759 are then tested.
4760 Chain weakdefs so we can get from the weakdef back to an alias.
4761 The list is circular so that we don't need to use u.weakdef as
4762 well as this list to look at all aliases. */
4763 if (eind->elf.root.type != bfd_link_hash_indirect)
4764 {
4765 struct ppc_link_hash_entry *cur, *add, *next;
4766
4767 add = eind;
4768 do
4769 {
4770 cur = edir->weakref;
4771 if (cur != NULL)
4772 {
4773 do
4774 {
4775 /* We can be called twice for the same symbols.
4776 Don't make multiple loops. */
4777 if (cur == add)
4778 return;
4779 cur = cur->weakref;
4780 } while (cur != edir);
4781 }
4782 next = add->weakref;
4783 if (cur != add)
4784 {
4785 add->weakref = edir->weakref != NULL ? edir->weakref : edir;
4786 edir->weakref = add;
4787 }
4788 add = next;
4789 } while (add != NULL && add != eind);
4790 return;
4791 }
4792
4793 /* Copy over any dynamic relocs we may have on the indirect sym. */
4794 if (eind->dyn_relocs != NULL)
4795 {
4796 if (edir->dyn_relocs != NULL)
4797 {
4798 struct elf_dyn_relocs **pp;
4799 struct elf_dyn_relocs *p;
4800
4801 /* Add reloc counts against the indirect sym to the direct sym
4802 list. Merge any entries against the same section. */
4803 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
4804 {
4805 struct elf_dyn_relocs *q;
4806
4807 for (q = edir->dyn_relocs; q != NULL; q = q->next)
4808 if (q->sec == p->sec)
4809 {
4810 q->pc_count += p->pc_count;
4811 q->count += p->count;
4812 *pp = p->next;
4813 break;
4814 }
4815 if (q == NULL)
4816 pp = &p->next;
4817 }
4818 *pp = edir->dyn_relocs;
4819 }
4820
4821 edir->dyn_relocs = eind->dyn_relocs;
4822 eind->dyn_relocs = NULL;
4823 }
4824
4825 /* Copy over got entries that we may have already seen to the
4826 symbol which just became indirect. */
4827 if (eind->elf.got.glist != NULL)
4828 {
4829 if (edir->elf.got.glist != NULL)
4830 {
4831 struct got_entry **entp;
4832 struct got_entry *ent;
4833
4834 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
4835 {
4836 struct got_entry *dent;
4837
4838 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
4839 if (dent->addend == ent->addend
4840 && dent->owner == ent->owner
4841 && dent->tls_type == ent->tls_type)
4842 {
4843 dent->got.refcount += ent->got.refcount;
4844 *entp = ent->next;
4845 break;
4846 }
4847 if (dent == NULL)
4848 entp = &ent->next;
4849 }
4850 *entp = edir->elf.got.glist;
4851 }
4852
4853 edir->elf.got.glist = eind->elf.got.glist;
4854 eind->elf.got.glist = NULL;
4855 }
4856
4857 /* And plt entries. */
4858 move_plt_plist (eind, edir);
4859
4860 if (eind->elf.dynindx != -1)
4861 {
4862 if (edir->elf.dynindx != -1)
4863 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4864 edir->elf.dynstr_index);
4865 edir->elf.dynindx = eind->elf.dynindx;
4866 edir->elf.dynstr_index = eind->elf.dynstr_index;
4867 eind->elf.dynindx = -1;
4868 eind->elf.dynstr_index = 0;
4869 }
4870 }
4871
4872 /* Find the function descriptor hash entry from the given function code
4873 hash entry FH. Link the entries via their OH fields. */
4874
4875 static struct ppc_link_hash_entry *
4876 lookup_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
4877 {
4878 struct ppc_link_hash_entry *fdh = fh->oh;
4879
4880 if (fdh == NULL)
4881 {
4882 const char *fd_name = fh->elf.root.root.string + 1;
4883
4884 fdh = (struct ppc_link_hash_entry *)
4885 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
4886 if (fdh == NULL)
4887 return fdh;
4888
4889 fdh->is_func_descriptor = 1;
4890 fdh->oh = fh;
4891 fh->is_func = 1;
4892 fh->oh = fdh;
4893 }
4894
4895 return ppc_follow_link (fdh);
4896 }
4897
4898 /* Make a fake function descriptor sym for the code sym FH. */
4899
4900 static struct ppc_link_hash_entry *
4901 make_fdh (struct bfd_link_info *info,
4902 struct ppc_link_hash_entry *fh)
4903 {
4904 bfd *abfd;
4905 asymbol *newsym;
4906 struct bfd_link_hash_entry *bh;
4907 struct ppc_link_hash_entry *fdh;
4908
4909 abfd = fh->elf.root.u.undef.abfd;
4910 newsym = bfd_make_empty_symbol (abfd);
4911 newsym->name = fh->elf.root.root.string + 1;
4912 newsym->section = bfd_und_section_ptr;
4913 newsym->value = 0;
4914 newsym->flags = BSF_WEAK;
4915
4916 bh = NULL;
4917 if (!_bfd_generic_link_add_one_symbol (info, abfd, newsym->name,
4918 newsym->flags, newsym->section,
4919 newsym->value, NULL, FALSE, FALSE,
4920 &bh))
4921 return NULL;
4922
4923 fdh = (struct ppc_link_hash_entry *) bh;
4924 fdh->elf.non_elf = 0;
4925 fdh->fake = 1;
4926 fdh->is_func_descriptor = 1;
4927 fdh->oh = fh;
4928 fh->is_func = 1;
4929 fh->oh = fdh;
4930 return fdh;
4931 }
4932
4933 /* Fix function descriptor symbols defined in .opd sections to be
4934 function type. */
4935
4936 static bfd_boolean
4937 ppc64_elf_add_symbol_hook (bfd *ibfd,
4938 struct bfd_link_info *info,
4939 Elf_Internal_Sym *isym,
4940 const char **name,
4941 flagword *flags ATTRIBUTE_UNUSED,
4942 asection **sec,
4943 bfd_vma *value)
4944 {
4945 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC
4946 && (ibfd->flags & DYNAMIC) == 0
4947 && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour)
4948 elf_tdata (info->output_bfd)->has_gnu_symbols |= elf_gnu_symbol_ifunc;
4949
4950 if (*sec != NULL
4951 && strcmp ((*sec)->name, ".opd") == 0)
4952 {
4953 asection *code_sec;
4954
4955 if (!(ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC
4956 || ELF_ST_TYPE (isym->st_info) == STT_FUNC))
4957 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
4958
4959 /* If the symbol is a function defined in .opd, and the function
4960 code is in a discarded group, let it appear to be undefined. */
4961 if (!bfd_link_relocatable (info)
4962 && (*sec)->reloc_count != 0
4963 && opd_entry_value (*sec, *value, &code_sec, NULL,
4964 FALSE) != (bfd_vma) -1
4965 && discarded_section (code_sec))
4966 {
4967 *sec = bfd_und_section_ptr;
4968 isym->st_shndx = SHN_UNDEF;
4969 }
4970 }
4971 else if (*sec != NULL
4972 && strcmp ((*sec)->name, ".toc") == 0
4973 && ELF_ST_TYPE (isym->st_info) == STT_OBJECT)
4974 {
4975 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4976 if (htab != NULL)
4977 htab->params->object_in_toc = 1;
4978 }
4979
4980 if ((STO_PPC64_LOCAL_MASK & isym->st_other) != 0)
4981 {
4982 if (abiversion (ibfd) == 0)
4983 set_abiversion (ibfd, 2);
4984 else if (abiversion (ibfd) == 1)
4985 {
4986 info->callbacks->einfo (_("%P: symbol '%s' has invalid st_other"
4987 " for ABI version 1\n"), name);
4988 bfd_set_error (bfd_error_bad_value);
4989 return FALSE;
4990 }
4991 }
4992
4993 return TRUE;
4994 }
4995
4996 /* Merge non-visibility st_other attributes: local entry point. */
4997
4998 static void
4999 ppc64_elf_merge_symbol_attribute (struct elf_link_hash_entry *h,
5000 const Elf_Internal_Sym *isym,
5001 bfd_boolean definition,
5002 bfd_boolean dynamic)
5003 {
5004 if (definition && !dynamic)
5005 h->other = ((isym->st_other & ~ELF_ST_VISIBILITY (-1))
5006 | ELF_ST_VISIBILITY (h->other));
5007 }
5008
5009 /* This function makes an old ABI object reference to ".bar" cause the
5010 inclusion of a new ABI object archive that defines "bar".
5011 NAME is a symbol defined in an archive. Return a symbol in the hash
5012 table that might be satisfied by the archive symbols. */
5013
5014 static struct elf_link_hash_entry *
5015 ppc64_elf_archive_symbol_lookup (bfd *abfd,
5016 struct bfd_link_info *info,
5017 const char *name)
5018 {
5019 struct elf_link_hash_entry *h;
5020 char *dot_name;
5021 size_t len;
5022
5023 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
5024 if (h != NULL
5025 /* Don't return this sym if it is a fake function descriptor
5026 created by add_symbol_adjust. */
5027 && !(h->root.type == bfd_link_hash_undefweak
5028 && ((struct ppc_link_hash_entry *) h)->fake))
5029 return h;
5030
5031 if (name[0] == '.')
5032 return h;
5033
5034 len = strlen (name);
5035 dot_name = bfd_alloc (abfd, len + 2);
5036 if (dot_name == NULL)
5037 return (struct elf_link_hash_entry *) 0 - 1;
5038 dot_name[0] = '.';
5039 memcpy (dot_name + 1, name, len + 1);
5040 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
5041 bfd_release (abfd, dot_name);
5042 return h;
5043 }
5044
5045 /* This function satisfies all old ABI object references to ".bar" if a
5046 new ABI object defines "bar". Well, at least, undefined dot symbols
5047 are made weak. This stops later archive searches from including an
5048 object if we already have a function descriptor definition. It also
5049 prevents the linker complaining about undefined symbols.
5050 We also check and correct mismatched symbol visibility here. The
5051 most restrictive visibility of the function descriptor and the
5052 function entry symbol is used. */
5053
5054 static bfd_boolean
5055 add_symbol_adjust (struct ppc_link_hash_entry *eh, struct bfd_link_info *info)
5056 {
5057 struct ppc_link_hash_table *htab;
5058 struct ppc_link_hash_entry *fdh;
5059
5060 if (eh->elf.root.type == bfd_link_hash_indirect)
5061 return TRUE;
5062
5063 if (eh->elf.root.type == bfd_link_hash_warning)
5064 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
5065
5066 if (eh->elf.root.root.string[0] != '.')
5067 abort ();
5068
5069 htab = ppc_hash_table (info);
5070 if (htab == NULL)
5071 return FALSE;
5072
5073 fdh = lookup_fdh (eh, htab);
5074 if (fdh == NULL)
5075 {
5076 if (!bfd_link_relocatable (info)
5077 && (eh->elf.root.type == bfd_link_hash_undefined
5078 || eh->elf.root.type == bfd_link_hash_undefweak)
5079 && eh->elf.ref_regular)
5080 {
5081 /* Make an undefweak function descriptor sym, which is enough to
5082 pull in an --as-needed shared lib, but won't cause link
5083 errors. Archives are handled elsewhere. */
5084 fdh = make_fdh (info, eh);
5085 if (fdh == NULL)
5086 return FALSE;
5087 fdh->elf.ref_regular = 1;
5088 }
5089 }
5090 else
5091 {
5092 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
5093 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
5094 if (entry_vis < descr_vis)
5095 fdh->elf.other += entry_vis - descr_vis;
5096 else if (entry_vis > descr_vis)
5097 eh->elf.other += descr_vis - entry_vis;
5098
5099 if ((fdh->elf.root.type == bfd_link_hash_defined
5100 || fdh->elf.root.type == bfd_link_hash_defweak)
5101 && eh->elf.root.type == bfd_link_hash_undefined)
5102 {
5103 eh->elf.root.type = bfd_link_hash_undefweak;
5104 eh->was_undefined = 1;
5105 htab->twiddled_syms = 1;
5106 }
5107 }
5108
5109 return TRUE;
5110 }
5111
5112 /* Set up opd section info and abiversion for IBFD, and process list
5113 of dot-symbols we made in link_hash_newfunc. */
5114
5115 static bfd_boolean
5116 ppc64_elf_before_check_relocs (bfd *ibfd, struct bfd_link_info *info)
5117 {
5118 struct ppc_link_hash_table *htab;
5119 struct ppc_link_hash_entry **p, *eh;
5120 asection *opd = bfd_get_section_by_name (ibfd, ".opd");
5121
5122 if (opd != NULL && opd->size != 0)
5123 {
5124 if (abiversion (ibfd) == 0)
5125 set_abiversion (ibfd, 1);
5126 else if (abiversion (ibfd) >= 2)
5127 {
5128 info->callbacks->einfo (_("%P: %B .opd not allowed in ABI"
5129 " version %d\n"),
5130 ibfd, abiversion (ibfd));
5131 bfd_set_error (bfd_error_bad_value);
5132 return FALSE;
5133 }
5134
5135 if ((ibfd->flags & DYNAMIC) == 0
5136 && (opd->flags & SEC_RELOC) != 0
5137 && opd->reloc_count != 0
5138 && !bfd_is_abs_section (opd->output_section))
5139 {
5140 /* Garbage collection needs some extra help with .opd sections.
5141 We don't want to necessarily keep everything referenced by
5142 relocs in .opd, as that would keep all functions. Instead,
5143 if we reference an .opd symbol (a function descriptor), we
5144 want to keep the function code symbol's section. This is
5145 easy for global symbols, but for local syms we need to keep
5146 information about the associated function section. */
5147 bfd_size_type amt;
5148 asection **opd_sym_map;
5149
5150 amt = OPD_NDX (opd->size) * sizeof (*opd_sym_map);
5151 opd_sym_map = bfd_zalloc (ibfd, amt);
5152 if (opd_sym_map == NULL)
5153 return FALSE;
5154 ppc64_elf_section_data (opd)->u.opd.func_sec = opd_sym_map;
5155 BFD_ASSERT (ppc64_elf_section_data (opd)->sec_type == sec_normal);
5156 ppc64_elf_section_data (opd)->sec_type = sec_opd;
5157 }
5158 }
5159
5160 if (!is_ppc64_elf (info->output_bfd))
5161 return TRUE;
5162 htab = ppc_hash_table (info);
5163 if (htab == NULL)
5164 return FALSE;
5165
5166 /* For input files without an explicit abiversion in e_flags
5167 we should have flagged any with symbol st_other bits set
5168 as ELFv1 and above flagged those with .opd as ELFv2.
5169 Set the output abiversion if not yet set, and for any input
5170 still ambiguous, take its abiversion from the output.
5171 Differences in ABI are reported later. */
5172 if (abiversion (info->output_bfd) == 0)
5173 set_abiversion (info->output_bfd, abiversion (ibfd));
5174 else if (abiversion (ibfd) == 0)
5175 set_abiversion (ibfd, abiversion (info->output_bfd));
5176
5177 p = &htab->dot_syms;
5178 while ((eh = *p) != NULL)
5179 {
5180 *p = NULL;
5181 if (&eh->elf == htab->elf.hgot)
5182 ;
5183 else if (htab->elf.hgot == NULL
5184 && strcmp (eh->elf.root.root.string, ".TOC.") == 0)
5185 htab->elf.hgot = &eh->elf;
5186 else if (!add_symbol_adjust (eh, info))
5187 return FALSE;
5188 p = &eh->u.next_dot_sym;
5189 }
5190
5191 /* Clear the list for non-ppc64 input files. */
5192 p = &htab->dot_syms;
5193 while ((eh = *p) != NULL)
5194 {
5195 *p = NULL;
5196 p = &eh->u.next_dot_sym;
5197 }
5198
5199 /* We need to fix the undefs list for any syms we have twiddled to
5200 undefweak. */
5201 if (htab->twiddled_syms)
5202 {
5203 bfd_link_repair_undef_list (&htab->elf.root);
5204 htab->twiddled_syms = 0;
5205 }
5206 return TRUE;
5207 }
5208
5209 /* Undo hash table changes when an --as-needed input file is determined
5210 not to be needed. */
5211
5212 static bfd_boolean
5213 ppc64_elf_notice_as_needed (bfd *ibfd,
5214 struct bfd_link_info *info,
5215 enum notice_asneeded_action act)
5216 {
5217 if (act == notice_not_needed)
5218 {
5219 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5220
5221 if (htab == NULL)
5222 return FALSE;
5223
5224 htab->dot_syms = NULL;
5225 }
5226 return _bfd_elf_notice_as_needed (ibfd, info, act);
5227 }
5228
5229 /* If --just-symbols against a final linked binary, then assume we need
5230 toc adjusting stubs when calling functions defined there. */
5231
5232 static void
5233 ppc64_elf_link_just_syms (asection *sec, struct bfd_link_info *info)
5234 {
5235 if ((sec->flags & SEC_CODE) != 0
5236 && (sec->owner->flags & (EXEC_P | DYNAMIC)) != 0
5237 && is_ppc64_elf (sec->owner))
5238 {
5239 if (abiversion (sec->owner) >= 2
5240 || bfd_get_section_by_name (sec->owner, ".opd") != NULL)
5241 sec->has_toc_reloc = 1;
5242 }
5243 _bfd_elf_link_just_syms (sec, info);
5244 }
5245
5246 static struct plt_entry **
5247 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
5248 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
5249 {
5250 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
5251 struct plt_entry **local_plt;
5252 unsigned char *local_got_tls_masks;
5253
5254 if (local_got_ents == NULL)
5255 {
5256 bfd_size_type size = symtab_hdr->sh_info;
5257
5258 size *= (sizeof (*local_got_ents)
5259 + sizeof (*local_plt)
5260 + sizeof (*local_got_tls_masks));
5261 local_got_ents = bfd_zalloc (abfd, size);
5262 if (local_got_ents == NULL)
5263 return NULL;
5264 elf_local_got_ents (abfd) = local_got_ents;
5265 }
5266
5267 if ((tls_type & (PLT_IFUNC | TLS_EXPLICIT)) == 0)
5268 {
5269 struct got_entry *ent;
5270
5271 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
5272 if (ent->addend == r_addend
5273 && ent->owner == abfd
5274 && ent->tls_type == tls_type)
5275 break;
5276 if (ent == NULL)
5277 {
5278 bfd_size_type amt = sizeof (*ent);
5279 ent = bfd_alloc (abfd, amt);
5280 if (ent == NULL)
5281 return FALSE;
5282 ent->next = local_got_ents[r_symndx];
5283 ent->addend = r_addend;
5284 ent->owner = abfd;
5285 ent->tls_type = tls_type;
5286 ent->is_indirect = FALSE;
5287 ent->got.refcount = 0;
5288 local_got_ents[r_symndx] = ent;
5289 }
5290 ent->got.refcount += 1;
5291 }
5292
5293 local_plt = (struct plt_entry **) (local_got_ents + symtab_hdr->sh_info);
5294 local_got_tls_masks = (unsigned char *) (local_plt + symtab_hdr->sh_info);
5295 local_got_tls_masks[r_symndx] |= tls_type;
5296
5297 return local_plt + r_symndx;
5298 }
5299
5300 static bfd_boolean
5301 update_plt_info (bfd *abfd, struct plt_entry **plist, bfd_vma addend)
5302 {
5303 struct plt_entry *ent;
5304
5305 for (ent = *plist; ent != NULL; ent = ent->next)
5306 if (ent->addend == addend)
5307 break;
5308 if (ent == NULL)
5309 {
5310 bfd_size_type amt = sizeof (*ent);
5311 ent = bfd_alloc (abfd, amt);
5312 if (ent == NULL)
5313 return FALSE;
5314 ent->next = *plist;
5315 ent->addend = addend;
5316 ent->plt.refcount = 0;
5317 *plist = ent;
5318 }
5319 ent->plt.refcount += 1;
5320 return TRUE;
5321 }
5322
5323 static bfd_boolean
5324 is_branch_reloc (enum elf_ppc64_reloc_type r_type)
5325 {
5326 return (r_type == R_PPC64_REL24
5327 || r_type == R_PPC64_REL14
5328 || r_type == R_PPC64_REL14_BRTAKEN
5329 || r_type == R_PPC64_REL14_BRNTAKEN
5330 || r_type == R_PPC64_ADDR24
5331 || r_type == R_PPC64_ADDR14
5332 || r_type == R_PPC64_ADDR14_BRTAKEN
5333 || r_type == R_PPC64_ADDR14_BRNTAKEN);
5334 }
5335
5336 /* Look through the relocs for a section during the first phase, and
5337 calculate needed space in the global offset table, procedure
5338 linkage table, and dynamic reloc sections. */
5339
5340 static bfd_boolean
5341 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
5342 asection *sec, const Elf_Internal_Rela *relocs)
5343 {
5344 struct ppc_link_hash_table *htab;
5345 Elf_Internal_Shdr *symtab_hdr;
5346 struct elf_link_hash_entry **sym_hashes;
5347 const Elf_Internal_Rela *rel;
5348 const Elf_Internal_Rela *rel_end;
5349 asection *sreloc;
5350 asection **opd_sym_map;
5351 struct elf_link_hash_entry *tga, *dottga;
5352
5353 if (bfd_link_relocatable (info))
5354 return TRUE;
5355
5356 /* Don't do anything special with non-loaded, non-alloced sections.
5357 In particular, any relocs in such sections should not affect GOT
5358 and PLT reference counting (ie. we don't allow them to create GOT
5359 or PLT entries), there's no possibility or desire to optimize TLS
5360 relocs, and there's not much point in propagating relocs to shared
5361 libs that the dynamic linker won't relocate. */
5362 if ((sec->flags & SEC_ALLOC) == 0)
5363 return TRUE;
5364
5365 BFD_ASSERT (is_ppc64_elf (abfd));
5366
5367 htab = ppc_hash_table (info);
5368 if (htab == NULL)
5369 return FALSE;
5370
5371 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
5372 FALSE, FALSE, TRUE);
5373 dottga = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
5374 FALSE, FALSE, TRUE);
5375 symtab_hdr = &elf_symtab_hdr (abfd);
5376 sym_hashes = elf_sym_hashes (abfd);
5377 sreloc = NULL;
5378 opd_sym_map = NULL;
5379 if (ppc64_elf_section_data (sec) != NULL
5380 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
5381 opd_sym_map = ppc64_elf_section_data (sec)->u.opd.func_sec;
5382
5383 rel_end = relocs + sec->reloc_count;
5384 for (rel = relocs; rel < rel_end; rel++)
5385 {
5386 unsigned long r_symndx;
5387 struct elf_link_hash_entry *h;
5388 enum elf_ppc64_reloc_type r_type;
5389 int tls_type;
5390 struct _ppc64_elf_section_data *ppc64_sec;
5391 struct plt_entry **ifunc, **plt_list;
5392
5393 r_symndx = ELF64_R_SYM (rel->r_info);
5394 if (r_symndx < symtab_hdr->sh_info)
5395 h = NULL;
5396 else
5397 {
5398 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5399 h = elf_follow_link (h);
5400
5401 /* PR15323, ref flags aren't set for references in the same
5402 object. */
5403 h->root.non_ir_ref = 1;
5404
5405 if (h == htab->elf.hgot)
5406 sec->has_toc_reloc = 1;
5407 }
5408
5409 tls_type = 0;
5410 ifunc = NULL;
5411 if (h != NULL)
5412 {
5413 if (h->type == STT_GNU_IFUNC)
5414 {
5415 h->needs_plt = 1;
5416 ifunc = &h->plt.plist;
5417 }
5418 }
5419 else
5420 {
5421 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5422 abfd, r_symndx);
5423 if (isym == NULL)
5424 return FALSE;
5425
5426 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
5427 {
5428 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
5429 rel->r_addend, PLT_IFUNC);
5430 if (ifunc == NULL)
5431 return FALSE;
5432 }
5433 }
5434
5435 r_type = ELF64_R_TYPE (rel->r_info);
5436 switch (r_type)
5437 {
5438 case R_PPC64_TLSGD:
5439 case R_PPC64_TLSLD:
5440 /* These special tls relocs tie a call to __tls_get_addr with
5441 its parameter symbol. */
5442 break;
5443
5444 case R_PPC64_GOT_TLSLD16:
5445 case R_PPC64_GOT_TLSLD16_LO:
5446 case R_PPC64_GOT_TLSLD16_HI:
5447 case R_PPC64_GOT_TLSLD16_HA:
5448 tls_type = TLS_TLS | TLS_LD;
5449 goto dogottls;
5450
5451 case R_PPC64_GOT_TLSGD16:
5452 case R_PPC64_GOT_TLSGD16_LO:
5453 case R_PPC64_GOT_TLSGD16_HI:
5454 case R_PPC64_GOT_TLSGD16_HA:
5455 tls_type = TLS_TLS | TLS_GD;
5456 goto dogottls;
5457
5458 case R_PPC64_GOT_TPREL16_DS:
5459 case R_PPC64_GOT_TPREL16_LO_DS:
5460 case R_PPC64_GOT_TPREL16_HI:
5461 case R_PPC64_GOT_TPREL16_HA:
5462 if (bfd_link_pic (info))
5463 info->flags |= DF_STATIC_TLS;
5464 tls_type = TLS_TLS | TLS_TPREL;
5465 goto dogottls;
5466
5467 case R_PPC64_GOT_DTPREL16_DS:
5468 case R_PPC64_GOT_DTPREL16_LO_DS:
5469 case R_PPC64_GOT_DTPREL16_HI:
5470 case R_PPC64_GOT_DTPREL16_HA:
5471 tls_type = TLS_TLS | TLS_DTPREL;
5472 dogottls:
5473 sec->has_tls_reloc = 1;
5474 /* Fall thru */
5475
5476 case R_PPC64_GOT16:
5477 case R_PPC64_GOT16_DS:
5478 case R_PPC64_GOT16_HA:
5479 case R_PPC64_GOT16_HI:
5480 case R_PPC64_GOT16_LO:
5481 case R_PPC64_GOT16_LO_DS:
5482 /* This symbol requires a global offset table entry. */
5483 sec->has_toc_reloc = 1;
5484 if (r_type == R_PPC64_GOT_TLSLD16
5485 || r_type == R_PPC64_GOT_TLSGD16
5486 || r_type == R_PPC64_GOT_TPREL16_DS
5487 || r_type == R_PPC64_GOT_DTPREL16_DS
5488 || r_type == R_PPC64_GOT16
5489 || r_type == R_PPC64_GOT16_DS)
5490 {
5491 htab->do_multi_toc = 1;
5492 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5493 }
5494
5495 if (ppc64_elf_tdata (abfd)->got == NULL
5496 && !create_got_section (abfd, info))
5497 return FALSE;
5498
5499 if (h != NULL)
5500 {
5501 struct ppc_link_hash_entry *eh;
5502 struct got_entry *ent;
5503
5504 eh = (struct ppc_link_hash_entry *) h;
5505 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
5506 if (ent->addend == rel->r_addend
5507 && ent->owner == abfd
5508 && ent->tls_type == tls_type)
5509 break;
5510 if (ent == NULL)
5511 {
5512 bfd_size_type amt = sizeof (*ent);
5513 ent = bfd_alloc (abfd, amt);
5514 if (ent == NULL)
5515 return FALSE;
5516 ent->next = eh->elf.got.glist;
5517 ent->addend = rel->r_addend;
5518 ent->owner = abfd;
5519 ent->tls_type = tls_type;
5520 ent->is_indirect = FALSE;
5521 ent->got.refcount = 0;
5522 eh->elf.got.glist = ent;
5523 }
5524 ent->got.refcount += 1;
5525 eh->tls_mask |= tls_type;
5526 }
5527 else
5528 /* This is a global offset table entry for a local symbol. */
5529 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5530 rel->r_addend, tls_type))
5531 return FALSE;
5532
5533 /* We may also need a plt entry if the symbol turns out to be
5534 an ifunc. */
5535 if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1)
5536 {
5537 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5538 return FALSE;
5539 }
5540 break;
5541
5542 case R_PPC64_PLT16_HA:
5543 case R_PPC64_PLT16_HI:
5544 case R_PPC64_PLT16_LO:
5545 case R_PPC64_PLT32:
5546 case R_PPC64_PLT64:
5547 /* This symbol requires a procedure linkage table entry. */
5548 plt_list = ifunc;
5549 if (h != NULL)
5550 {
5551 h->needs_plt = 1;
5552 if (h->root.root.string[0] == '.'
5553 && h->root.root.string[1] != '\0')
5554 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5555 plt_list = &h->plt.plist;
5556 }
5557 if (plt_list == NULL)
5558 {
5559 /* It does not make sense to have a procedure linkage
5560 table entry for a non-ifunc local symbol. */
5561 info->callbacks->einfo
5562 (_("%P: %H: %s reloc against local symbol\n"),
5563 abfd, sec, rel->r_offset,
5564 ppc64_elf_howto_table[r_type]->name);
5565 bfd_set_error (bfd_error_bad_value);
5566 return FALSE;
5567 }
5568 if (!update_plt_info (abfd, plt_list, rel->r_addend))
5569 return FALSE;
5570 break;
5571
5572 /* The following relocations don't need to propagate the
5573 relocation if linking a shared object since they are
5574 section relative. */
5575 case R_PPC64_SECTOFF:
5576 case R_PPC64_SECTOFF_LO:
5577 case R_PPC64_SECTOFF_HI:
5578 case R_PPC64_SECTOFF_HA:
5579 case R_PPC64_SECTOFF_DS:
5580 case R_PPC64_SECTOFF_LO_DS:
5581 case R_PPC64_DTPREL16:
5582 case R_PPC64_DTPREL16_LO:
5583 case R_PPC64_DTPREL16_HI:
5584 case R_PPC64_DTPREL16_HA:
5585 case R_PPC64_DTPREL16_DS:
5586 case R_PPC64_DTPREL16_LO_DS:
5587 case R_PPC64_DTPREL16_HIGH:
5588 case R_PPC64_DTPREL16_HIGHA:
5589 case R_PPC64_DTPREL16_HIGHER:
5590 case R_PPC64_DTPREL16_HIGHERA:
5591 case R_PPC64_DTPREL16_HIGHEST:
5592 case R_PPC64_DTPREL16_HIGHESTA:
5593 break;
5594
5595 /* Nor do these. */
5596 case R_PPC64_REL16:
5597 case R_PPC64_REL16_LO:
5598 case R_PPC64_REL16_HI:
5599 case R_PPC64_REL16_HA:
5600 case R_PPC64_REL16DX_HA:
5601 break;
5602
5603 /* Not supported as a dynamic relocation. */
5604 case R_PPC64_ADDR64_LOCAL:
5605 if (bfd_link_pic (info))
5606 {
5607 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
5608 ppc_howto_init ();
5609 info->callbacks->einfo (_("%P: %H: %s reloc unsupported "
5610 "in shared libraries and PIEs.\n"),
5611 abfd, sec, rel->r_offset,
5612 ppc64_elf_howto_table[r_type]->name);
5613 bfd_set_error (bfd_error_bad_value);
5614 return FALSE;
5615 }
5616 break;
5617
5618 case R_PPC64_TOC16:
5619 case R_PPC64_TOC16_DS:
5620 htab->do_multi_toc = 1;
5621 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5622 case R_PPC64_TOC16_LO:
5623 case R_PPC64_TOC16_HI:
5624 case R_PPC64_TOC16_HA:
5625 case R_PPC64_TOC16_LO_DS:
5626 sec->has_toc_reloc = 1;
5627 break;
5628
5629 /* Marker reloc. */
5630 case R_PPC64_ENTRY:
5631 break;
5632
5633 /* This relocation describes the C++ object vtable hierarchy.
5634 Reconstruct it for later use during GC. */
5635 case R_PPC64_GNU_VTINHERIT:
5636 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
5637 return FALSE;
5638 break;
5639
5640 /* This relocation describes which C++ vtable entries are actually
5641 used. Record for later use during GC. */
5642 case R_PPC64_GNU_VTENTRY:
5643 BFD_ASSERT (h != NULL);
5644 if (h != NULL
5645 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
5646 return FALSE;
5647 break;
5648
5649 case R_PPC64_REL14:
5650 case R_PPC64_REL14_BRTAKEN:
5651 case R_PPC64_REL14_BRNTAKEN:
5652 {
5653 asection *dest = NULL;
5654
5655 /* Heuristic: If jumping outside our section, chances are
5656 we are going to need a stub. */
5657 if (h != NULL)
5658 {
5659 /* If the sym is weak it may be overridden later, so
5660 don't assume we know where a weak sym lives. */
5661 if (h->root.type == bfd_link_hash_defined)
5662 dest = h->root.u.def.section;
5663 }
5664 else
5665 {
5666 Elf_Internal_Sym *isym;
5667
5668 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5669 abfd, r_symndx);
5670 if (isym == NULL)
5671 return FALSE;
5672
5673 dest = bfd_section_from_elf_index (abfd, isym->st_shndx);
5674 }
5675
5676 if (dest != sec)
5677 ppc64_elf_section_data (sec)->has_14bit_branch = 1;
5678 }
5679 /* Fall through. */
5680
5681 case R_PPC64_REL24:
5682 plt_list = ifunc;
5683 if (h != NULL)
5684 {
5685 h->needs_plt = 1;
5686 if (h->root.root.string[0] == '.'
5687 && h->root.root.string[1] != '\0')
5688 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5689
5690 if (h == tga || h == dottga)
5691 {
5692 sec->has_tls_reloc = 1;
5693 if (rel != relocs
5694 && (ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSGD
5695 || ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSLD))
5696 /* We have a new-style __tls_get_addr call with
5697 a marker reloc. */
5698 ;
5699 else
5700 /* Mark this section as having an old-style call. */
5701 sec->has_tls_get_addr_call = 1;
5702 }
5703 plt_list = &h->plt.plist;
5704 }
5705
5706 /* We may need a .plt entry if the function this reloc
5707 refers to is in a shared lib. */
5708 if (plt_list
5709 && !update_plt_info (abfd, plt_list, rel->r_addend))
5710 return FALSE;
5711 break;
5712
5713 case R_PPC64_ADDR14:
5714 case R_PPC64_ADDR14_BRNTAKEN:
5715 case R_PPC64_ADDR14_BRTAKEN:
5716 case R_PPC64_ADDR24:
5717 goto dodyn;
5718
5719 case R_PPC64_TPREL64:
5720 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
5721 if (bfd_link_pic (info))
5722 info->flags |= DF_STATIC_TLS;
5723 goto dotlstoc;
5724
5725 case R_PPC64_DTPMOD64:
5726 if (rel + 1 < rel_end
5727 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
5728 && rel[1].r_offset == rel->r_offset + 8)
5729 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
5730 else
5731 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
5732 goto dotlstoc;
5733
5734 case R_PPC64_DTPREL64:
5735 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
5736 if (rel != relocs
5737 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
5738 && rel[-1].r_offset == rel->r_offset - 8)
5739 /* This is the second reloc of a dtpmod, dtprel pair.
5740 Don't mark with TLS_DTPREL. */
5741 goto dodyn;
5742
5743 dotlstoc:
5744 sec->has_tls_reloc = 1;
5745 if (h != NULL)
5746 {
5747 struct ppc_link_hash_entry *eh;
5748 eh = (struct ppc_link_hash_entry *) h;
5749 eh->tls_mask |= tls_type;
5750 }
5751 else
5752 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5753 rel->r_addend, tls_type))
5754 return FALSE;
5755
5756 ppc64_sec = ppc64_elf_section_data (sec);
5757 if (ppc64_sec->sec_type != sec_toc)
5758 {
5759 bfd_size_type amt;
5760
5761 /* One extra to simplify get_tls_mask. */
5762 amt = sec->size * sizeof (unsigned) / 8 + sizeof (unsigned);
5763 ppc64_sec->u.toc.symndx = bfd_zalloc (abfd, amt);
5764 if (ppc64_sec->u.toc.symndx == NULL)
5765 return FALSE;
5766 amt = sec->size * sizeof (bfd_vma) / 8;
5767 ppc64_sec->u.toc.add = bfd_zalloc (abfd, amt);
5768 if (ppc64_sec->u.toc.add == NULL)
5769 return FALSE;
5770 BFD_ASSERT (ppc64_sec->sec_type == sec_normal);
5771 ppc64_sec->sec_type = sec_toc;
5772 }
5773 BFD_ASSERT (rel->r_offset % 8 == 0);
5774 ppc64_sec->u.toc.symndx[rel->r_offset / 8] = r_symndx;
5775 ppc64_sec->u.toc.add[rel->r_offset / 8] = rel->r_addend;
5776
5777 /* Mark the second slot of a GD or LD entry.
5778 -1 to indicate GD and -2 to indicate LD. */
5779 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
5780 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -1;
5781 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
5782 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -2;
5783 goto dodyn;
5784
5785 case R_PPC64_TPREL16:
5786 case R_PPC64_TPREL16_LO:
5787 case R_PPC64_TPREL16_HI:
5788 case R_PPC64_TPREL16_HA:
5789 case R_PPC64_TPREL16_DS:
5790 case R_PPC64_TPREL16_LO_DS:
5791 case R_PPC64_TPREL16_HIGH:
5792 case R_PPC64_TPREL16_HIGHA:
5793 case R_PPC64_TPREL16_HIGHER:
5794 case R_PPC64_TPREL16_HIGHERA:
5795 case R_PPC64_TPREL16_HIGHEST:
5796 case R_PPC64_TPREL16_HIGHESTA:
5797 if (bfd_link_pic (info))
5798 {
5799 info->flags |= DF_STATIC_TLS;
5800 goto dodyn;
5801 }
5802 break;
5803
5804 case R_PPC64_ADDR64:
5805 if (opd_sym_map != NULL
5806 && rel + 1 < rel_end
5807 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
5808 {
5809 if (h != NULL)
5810 {
5811 if (h->root.root.string[0] == '.'
5812 && h->root.root.string[1] != 0
5813 && lookup_fdh ((struct ppc_link_hash_entry *) h, htab))
5814 ;
5815 else
5816 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5817 }
5818 else
5819 {
5820 asection *s;
5821 Elf_Internal_Sym *isym;
5822
5823 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5824 abfd, r_symndx);
5825 if (isym == NULL)
5826 return FALSE;
5827
5828 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5829 if (s != NULL && s != sec)
5830 opd_sym_map[OPD_NDX (rel->r_offset)] = s;
5831 }
5832 }
5833 /* Fall through. */
5834
5835 case R_PPC64_ADDR16:
5836 case R_PPC64_ADDR16_DS:
5837 case R_PPC64_ADDR16_HA:
5838 case R_PPC64_ADDR16_HI:
5839 case R_PPC64_ADDR16_HIGH:
5840 case R_PPC64_ADDR16_HIGHA:
5841 case R_PPC64_ADDR16_HIGHER:
5842 case R_PPC64_ADDR16_HIGHERA:
5843 case R_PPC64_ADDR16_HIGHEST:
5844 case R_PPC64_ADDR16_HIGHESTA:
5845 case R_PPC64_ADDR16_LO:
5846 case R_PPC64_ADDR16_LO_DS:
5847 if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1
5848 && rel->r_addend == 0)
5849 {
5850 /* We may need a .plt entry if this reloc refers to a
5851 function in a shared lib. */
5852 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5853 return FALSE;
5854 h->pointer_equality_needed = 1;
5855 }
5856 /* Fall through. */
5857
5858 case R_PPC64_REL30:
5859 case R_PPC64_REL32:
5860 case R_PPC64_REL64:
5861 case R_PPC64_ADDR32:
5862 case R_PPC64_UADDR16:
5863 case R_PPC64_UADDR32:
5864 case R_PPC64_UADDR64:
5865 case R_PPC64_TOC:
5866 if (h != NULL && !bfd_link_pic (info))
5867 /* We may need a copy reloc. */
5868 h->non_got_ref = 1;
5869
5870 /* Don't propagate .opd relocs. */
5871 if (NO_OPD_RELOCS && opd_sym_map != NULL)
5872 break;
5873
5874 /* If we are creating a shared library, and this is a reloc
5875 against a global symbol, or a non PC relative reloc
5876 against a local symbol, then we need to copy the reloc
5877 into the shared library. However, if we are linking with
5878 -Bsymbolic, we do not need to copy a reloc against a
5879 global symbol which is defined in an object we are
5880 including in the link (i.e., DEF_REGULAR is set). At
5881 this point we have not seen all the input files, so it is
5882 possible that DEF_REGULAR is not set now but will be set
5883 later (it is never cleared). In case of a weak definition,
5884 DEF_REGULAR may be cleared later by a strong definition in
5885 a shared library. We account for that possibility below by
5886 storing information in the dyn_relocs field of the hash
5887 table entry. A similar situation occurs when creating
5888 shared libraries and symbol visibility changes render the
5889 symbol local.
5890
5891 If on the other hand, we are creating an executable, we
5892 may need to keep relocations for symbols satisfied by a
5893 dynamic library if we manage to avoid copy relocs for the
5894 symbol. */
5895 dodyn:
5896 if ((bfd_link_pic (info)
5897 && (must_be_dyn_reloc (info, r_type)
5898 || (h != NULL
5899 && (!SYMBOLIC_BIND (info, h)
5900 || h->root.type == bfd_link_hash_defweak
5901 || !h->def_regular))))
5902 || (ELIMINATE_COPY_RELOCS
5903 && !bfd_link_pic (info)
5904 && h != NULL
5905 && (h->root.type == bfd_link_hash_defweak
5906 || !h->def_regular))
5907 || (!bfd_link_pic (info)
5908 && ifunc != NULL))
5909 {
5910 /* We must copy these reloc types into the output file.
5911 Create a reloc section in dynobj and make room for
5912 this reloc. */
5913 if (sreloc == NULL)
5914 {
5915 sreloc = _bfd_elf_make_dynamic_reloc_section
5916 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
5917
5918 if (sreloc == NULL)
5919 return FALSE;
5920 }
5921
5922 /* If this is a global symbol, we count the number of
5923 relocations we need for this symbol. */
5924 if (h != NULL)
5925 {
5926 struct elf_dyn_relocs *p;
5927 struct elf_dyn_relocs **head;
5928
5929 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
5930 p = *head;
5931 if (p == NULL || p->sec != sec)
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->count = 0;
5940 p->pc_count = 0;
5941 }
5942 p->count += 1;
5943 if (!must_be_dyn_reloc (info, r_type))
5944 p->pc_count += 1;
5945 }
5946 else
5947 {
5948 /* Track dynamic relocs needed for local syms too.
5949 We really need local syms available to do this
5950 easily. Oh well. */
5951 struct ppc_dyn_relocs *p;
5952 struct ppc_dyn_relocs **head;
5953 bfd_boolean is_ifunc;
5954 asection *s;
5955 void *vpp;
5956 Elf_Internal_Sym *isym;
5957
5958 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5959 abfd, r_symndx);
5960 if (isym == NULL)
5961 return FALSE;
5962
5963 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5964 if (s == NULL)
5965 s = sec;
5966
5967 vpp = &elf_section_data (s)->local_dynrel;
5968 head = (struct ppc_dyn_relocs **) vpp;
5969 is_ifunc = ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC;
5970 p = *head;
5971 if (p != NULL && p->sec == sec && p->ifunc != is_ifunc)
5972 p = p->next;
5973 if (p == NULL || p->sec != sec || p->ifunc != is_ifunc)
5974 {
5975 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5976 if (p == NULL)
5977 return FALSE;
5978 p->next = *head;
5979 *head = p;
5980 p->sec = sec;
5981 p->ifunc = is_ifunc;
5982 p->count = 0;
5983 }
5984 p->count += 1;
5985 }
5986 }
5987 break;
5988
5989 default:
5990 break;
5991 }
5992 }
5993
5994 return TRUE;
5995 }
5996
5997 /* Merge backend specific data from an object file to the output
5998 object file when linking. */
5999
6000 static bfd_boolean
6001 ppc64_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
6002 {
6003 unsigned long iflags, oflags;
6004
6005 if ((ibfd->flags & BFD_LINKER_CREATED) != 0)
6006 return TRUE;
6007
6008 if (!is_ppc64_elf (ibfd) || !is_ppc64_elf (obfd))
6009 return TRUE;
6010
6011 if (!_bfd_generic_verify_endian_match (ibfd, obfd))
6012 return FALSE;
6013
6014 iflags = elf_elfheader (ibfd)->e_flags;
6015 oflags = elf_elfheader (obfd)->e_flags;
6016
6017 if (iflags & ~EF_PPC64_ABI)
6018 {
6019 _bfd_error_handler
6020 (_("%B uses unknown e_flags 0x%lx"), ibfd, iflags);
6021 bfd_set_error (bfd_error_bad_value);
6022 return FALSE;
6023 }
6024 else if (iflags != oflags && iflags != 0)
6025 {
6026 _bfd_error_handler
6027 (_("%B: ABI version %ld is not compatible with ABI version %ld output"),
6028 ibfd, iflags, oflags);
6029 bfd_set_error (bfd_error_bad_value);
6030 return FALSE;
6031 }
6032
6033 _bfd_elf_ppc_merge_fp_attributes (ibfd, obfd);
6034
6035 /* Merge Tag_compatibility attributes and any common GNU ones. */
6036 _bfd_elf_merge_object_attributes (ibfd, obfd);
6037
6038 return TRUE;
6039 }
6040
6041 static bfd_boolean
6042 ppc64_elf_print_private_bfd_data (bfd *abfd, void *ptr)
6043 {
6044 /* Print normal ELF private data. */
6045 _bfd_elf_print_private_bfd_data (abfd, ptr);
6046
6047 if (elf_elfheader (abfd)->e_flags != 0)
6048 {
6049 FILE *file = ptr;
6050
6051 /* xgettext:c-format */
6052 fprintf (file, _("private flags = 0x%lx:"),
6053 elf_elfheader (abfd)->e_flags);
6054
6055 if ((elf_elfheader (abfd)->e_flags & EF_PPC64_ABI) != 0)
6056 fprintf (file, _(" [abiv%ld]"),
6057 elf_elfheader (abfd)->e_flags & EF_PPC64_ABI);
6058 fputc ('\n', file);
6059 }
6060
6061 return TRUE;
6062 }
6063
6064 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
6065 of the code entry point, and its section, which must be in the same
6066 object as OPD_SEC. Returns (bfd_vma) -1 on error. */
6067
6068 static bfd_vma
6069 opd_entry_value (asection *opd_sec,
6070 bfd_vma offset,
6071 asection **code_sec,
6072 bfd_vma *code_off,
6073 bfd_boolean in_code_sec)
6074 {
6075 bfd *opd_bfd = opd_sec->owner;
6076 Elf_Internal_Rela *relocs;
6077 Elf_Internal_Rela *lo, *hi, *look;
6078 bfd_vma val;
6079
6080 /* No relocs implies we are linking a --just-symbols object, or looking
6081 at a final linked executable with addr2line or somesuch. */
6082 if (opd_sec->reloc_count == 0)
6083 {
6084 bfd_byte *contents = ppc64_elf_tdata (opd_bfd)->opd.contents;
6085
6086 if (contents == NULL)
6087 {
6088 if (!bfd_malloc_and_get_section (opd_bfd, opd_sec, &contents))
6089 return (bfd_vma) -1;
6090 ppc64_elf_tdata (opd_bfd)->opd.contents = contents;
6091 }
6092
6093 /* PR 17512: file: 64b9dfbb. */
6094 if (offset + 7 >= opd_sec->size || offset + 7 < offset)
6095 return (bfd_vma) -1;
6096
6097 val = bfd_get_64 (opd_bfd, contents + offset);
6098 if (code_sec != NULL)
6099 {
6100 asection *sec, *likely = NULL;
6101
6102 if (in_code_sec)
6103 {
6104 sec = *code_sec;
6105 if (sec->vma <= val
6106 && val < sec->vma + sec->size)
6107 likely = sec;
6108 else
6109 val = -1;
6110 }
6111 else
6112 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
6113 if (sec->vma <= val
6114 && (sec->flags & SEC_LOAD) != 0
6115 && (sec->flags & SEC_ALLOC) != 0)
6116 likely = sec;
6117 if (likely != NULL)
6118 {
6119 *code_sec = likely;
6120 if (code_off != NULL)
6121 *code_off = val - likely->vma;
6122 }
6123 }
6124 return val;
6125 }
6126
6127 BFD_ASSERT (is_ppc64_elf (opd_bfd));
6128
6129 relocs = ppc64_elf_tdata (opd_bfd)->opd.relocs;
6130 if (relocs == NULL)
6131 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
6132 /* PR 17512: file: df8e1fd6. */
6133 if (relocs == NULL)
6134 return (bfd_vma) -1;
6135
6136 /* Go find the opd reloc at the sym address. */
6137 lo = relocs;
6138 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
6139 val = (bfd_vma) -1;
6140 while (lo < hi)
6141 {
6142 look = lo + (hi - lo) / 2;
6143 if (look->r_offset < offset)
6144 lo = look + 1;
6145 else if (look->r_offset > offset)
6146 hi = look;
6147 else
6148 {
6149 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (opd_bfd);
6150
6151 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
6152 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
6153 {
6154 unsigned long symndx = ELF64_R_SYM (look->r_info);
6155 asection *sec = NULL;
6156
6157 if (symndx >= symtab_hdr->sh_info
6158 && elf_sym_hashes (opd_bfd) != NULL)
6159 {
6160 struct elf_link_hash_entry **sym_hashes;
6161 struct elf_link_hash_entry *rh;
6162
6163 sym_hashes = elf_sym_hashes (opd_bfd);
6164 rh = sym_hashes[symndx - symtab_hdr->sh_info];
6165 if (rh != NULL)
6166 {
6167 rh = elf_follow_link (rh);
6168 if (rh->root.type != bfd_link_hash_defined
6169 && rh->root.type != bfd_link_hash_defweak)
6170 break;
6171 if (rh->root.u.def.section->owner == opd_bfd)
6172 {
6173 val = rh->root.u.def.value;
6174 sec = rh->root.u.def.section;
6175 }
6176 }
6177 }
6178
6179 if (sec == NULL)
6180 {
6181 Elf_Internal_Sym *sym;
6182
6183 if (symndx < symtab_hdr->sh_info)
6184 {
6185 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
6186 if (sym == NULL)
6187 {
6188 size_t symcnt = symtab_hdr->sh_info;
6189 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
6190 symcnt, 0,
6191 NULL, NULL, NULL);
6192 if (sym == NULL)
6193 break;
6194 symtab_hdr->contents = (bfd_byte *) sym;
6195 }
6196 sym += symndx;
6197 }
6198 else
6199 {
6200 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
6201 1, symndx,
6202 NULL, NULL, NULL);
6203 if (sym == NULL)
6204 break;
6205 }
6206 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
6207 if (sec == NULL)
6208 break;
6209 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
6210 val = sym->st_value;
6211 }
6212
6213 val += look->r_addend;
6214 if (code_off != NULL)
6215 *code_off = val;
6216 if (code_sec != NULL)
6217 {
6218 if (in_code_sec && *code_sec != sec)
6219 return -1;
6220 else
6221 *code_sec = sec;
6222 }
6223 if (sec->output_section != NULL)
6224 val += sec->output_section->vma + sec->output_offset;
6225 }
6226 break;
6227 }
6228 }
6229
6230 return val;
6231 }
6232
6233 /* If the ELF symbol SYM might be a function in SEC, return the
6234 function size and set *CODE_OFF to the function's entry point,
6235 otherwise return zero. */
6236
6237 static bfd_size_type
6238 ppc64_elf_maybe_function_sym (const asymbol *sym, asection *sec,
6239 bfd_vma *code_off)
6240 {
6241 bfd_size_type size;
6242
6243 if ((sym->flags & (BSF_SECTION_SYM | BSF_FILE | BSF_OBJECT
6244 | BSF_THREAD_LOCAL | BSF_RELC | BSF_SRELC)) != 0)
6245 return 0;
6246
6247 size = 0;
6248 if (!(sym->flags & BSF_SYNTHETIC))
6249 size = ((elf_symbol_type *) sym)->internal_elf_sym.st_size;
6250
6251 if (strcmp (sym->section->name, ".opd") == 0)
6252 {
6253 struct _opd_sec_data *opd = get_opd_info (sym->section);
6254 bfd_vma symval = sym->value;
6255
6256 if (opd != NULL
6257 && opd->adjust != NULL
6258 && elf_section_data (sym->section)->relocs != NULL)
6259 {
6260 /* opd_entry_value will use cached relocs that have been
6261 adjusted, but with raw symbols. That means both local
6262 and global symbols need adjusting. */
6263 long adjust = opd->adjust[OPD_NDX (symval)];
6264 if (adjust == -1)
6265 return 0;
6266 symval += adjust;
6267 }
6268
6269 if (opd_entry_value (sym->section, symval,
6270 &sec, code_off, TRUE) == (bfd_vma) -1)
6271 return 0;
6272 /* An old ABI binary with dot-syms has a size of 24 on the .opd
6273 symbol. This size has nothing to do with the code size of the
6274 function, which is what we're supposed to return, but the
6275 code size isn't available without looking up the dot-sym.
6276 However, doing that would be a waste of time particularly
6277 since elf_find_function will look at the dot-sym anyway.
6278 Now, elf_find_function will keep the largest size of any
6279 function sym found at the code address of interest, so return
6280 1 here to avoid it incorrectly caching a larger function size
6281 for a small function. This does mean we return the wrong
6282 size for a new-ABI function of size 24, but all that does is
6283 disable caching for such functions. */
6284 if (size == 24)
6285 size = 1;
6286 }
6287 else
6288 {
6289 if (sym->section != sec)
6290 return 0;
6291 *code_off = sym->value;
6292 }
6293 if (size == 0)
6294 size = 1;
6295 return size;
6296 }
6297
6298 /* Return true if symbol is defined in a regular object file. */
6299
6300 static bfd_boolean
6301 is_static_defined (struct elf_link_hash_entry *h)
6302 {
6303 return ((h->root.type == bfd_link_hash_defined
6304 || h->root.type == bfd_link_hash_defweak)
6305 && h->root.u.def.section != NULL
6306 && h->root.u.def.section->output_section != NULL);
6307 }
6308
6309 /* If FDH is a function descriptor symbol, return the associated code
6310 entry symbol if it is defined. Return NULL otherwise. */
6311
6312 static struct ppc_link_hash_entry *
6313 defined_code_entry (struct ppc_link_hash_entry *fdh)
6314 {
6315 if (fdh->is_func_descriptor)
6316 {
6317 struct ppc_link_hash_entry *fh = ppc_follow_link (fdh->oh);
6318 if (fh->elf.root.type == bfd_link_hash_defined
6319 || fh->elf.root.type == bfd_link_hash_defweak)
6320 return fh;
6321 }
6322 return NULL;
6323 }
6324
6325 /* If FH is a function code entry symbol, return the associated
6326 function descriptor symbol if it is defined. Return NULL otherwise. */
6327
6328 static struct ppc_link_hash_entry *
6329 defined_func_desc (struct ppc_link_hash_entry *fh)
6330 {
6331 if (fh->oh != NULL
6332 && fh->oh->is_func_descriptor)
6333 {
6334 struct ppc_link_hash_entry *fdh = ppc_follow_link (fh->oh);
6335 if (fdh->elf.root.type == bfd_link_hash_defined
6336 || fdh->elf.root.type == bfd_link_hash_defweak)
6337 return fdh;
6338 }
6339 return NULL;
6340 }
6341
6342 /* Mark all our entry sym sections, both opd and code section. */
6343
6344 static void
6345 ppc64_elf_gc_keep (struct bfd_link_info *info)
6346 {
6347 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6348 struct bfd_sym_chain *sym;
6349
6350 if (htab == NULL)
6351 return;
6352
6353 for (sym = info->gc_sym_list; sym != NULL; sym = sym->next)
6354 {
6355 struct ppc_link_hash_entry *eh, *fh;
6356 asection *sec;
6357
6358 eh = (struct ppc_link_hash_entry *)
6359 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, TRUE);
6360 if (eh == NULL)
6361 continue;
6362 if (eh->elf.root.type != bfd_link_hash_defined
6363 && eh->elf.root.type != bfd_link_hash_defweak)
6364 continue;
6365
6366 fh = defined_code_entry (eh);
6367 if (fh != NULL)
6368 {
6369 sec = fh->elf.root.u.def.section;
6370 sec->flags |= SEC_KEEP;
6371 }
6372 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6373 && opd_entry_value (eh->elf.root.u.def.section,
6374 eh->elf.root.u.def.value,
6375 &sec, NULL, FALSE) != (bfd_vma) -1)
6376 sec->flags |= SEC_KEEP;
6377
6378 sec = eh->elf.root.u.def.section;
6379 sec->flags |= SEC_KEEP;
6380 }
6381 }
6382
6383 /* Mark sections containing dynamically referenced symbols. When
6384 building shared libraries, we must assume that any visible symbol is
6385 referenced. */
6386
6387 static bfd_boolean
6388 ppc64_elf_gc_mark_dynamic_ref (struct elf_link_hash_entry *h, void *inf)
6389 {
6390 struct bfd_link_info *info = (struct bfd_link_info *) inf;
6391 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
6392 struct ppc_link_hash_entry *fdh;
6393 struct bfd_elf_dynamic_list *d = info->dynamic_list;
6394
6395 /* Dynamic linking info is on the func descriptor sym. */
6396 fdh = defined_func_desc (eh);
6397 if (fdh != NULL)
6398 eh = fdh;
6399
6400 if ((eh->elf.root.type == bfd_link_hash_defined
6401 || eh->elf.root.type == bfd_link_hash_defweak)
6402 && (eh->elf.ref_dynamic
6403 || ((eh->elf.def_regular || ELF_COMMON_DEF_P (&eh->elf))
6404 && ELF_ST_VISIBILITY (eh->elf.other) != STV_INTERNAL
6405 && ELF_ST_VISIBILITY (eh->elf.other) != STV_HIDDEN
6406 && (!bfd_link_executable (info)
6407 || info->export_dynamic
6408 || (eh->elf.dynamic
6409 && d != NULL
6410 && (*d->match) (&d->head, NULL, eh->elf.root.root.string)))
6411 && (strchr (eh->elf.root.root.string, ELF_VER_CHR) != NULL
6412 || !bfd_hide_sym_by_version (info->version_info,
6413 eh->elf.root.root.string)))))
6414 {
6415 asection *code_sec;
6416 struct ppc_link_hash_entry *fh;
6417
6418 eh->elf.root.u.def.section->flags |= SEC_KEEP;
6419
6420 /* Function descriptor syms cause the associated
6421 function code sym section to be marked. */
6422 fh = defined_code_entry (eh);
6423 if (fh != NULL)
6424 {
6425 code_sec = fh->elf.root.u.def.section;
6426 code_sec->flags |= SEC_KEEP;
6427 }
6428 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6429 && opd_entry_value (eh->elf.root.u.def.section,
6430 eh->elf.root.u.def.value,
6431 &code_sec, NULL, FALSE) != (bfd_vma) -1)
6432 code_sec->flags |= SEC_KEEP;
6433 }
6434
6435 return TRUE;
6436 }
6437
6438 /* Return the section that should be marked against GC for a given
6439 relocation. */
6440
6441 static asection *
6442 ppc64_elf_gc_mark_hook (asection *sec,
6443 struct bfd_link_info *info,
6444 Elf_Internal_Rela *rel,
6445 struct elf_link_hash_entry *h,
6446 Elf_Internal_Sym *sym)
6447 {
6448 asection *rsec;
6449
6450 /* Syms return NULL if we're marking .opd, so we avoid marking all
6451 function sections, as all functions are referenced in .opd. */
6452 rsec = NULL;
6453 if (get_opd_info (sec) != NULL)
6454 return rsec;
6455
6456 if (h != NULL)
6457 {
6458 enum elf_ppc64_reloc_type r_type;
6459 struct ppc_link_hash_entry *eh, *fh, *fdh;
6460
6461 r_type = ELF64_R_TYPE (rel->r_info);
6462 switch (r_type)
6463 {
6464 case R_PPC64_GNU_VTINHERIT:
6465 case R_PPC64_GNU_VTENTRY:
6466 break;
6467
6468 default:
6469 switch (h->root.type)
6470 {
6471 case bfd_link_hash_defined:
6472 case bfd_link_hash_defweak:
6473 eh = (struct ppc_link_hash_entry *) h;
6474 fdh = defined_func_desc (eh);
6475 if (fdh != NULL)
6476 eh = fdh;
6477
6478 /* Function descriptor syms cause the associated
6479 function code sym section to be marked. */
6480 fh = defined_code_entry (eh);
6481 if (fh != NULL)
6482 {
6483 /* They also mark their opd section. */
6484 eh->elf.root.u.def.section->gc_mark = 1;
6485
6486 rsec = fh->elf.root.u.def.section;
6487 }
6488 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6489 && opd_entry_value (eh->elf.root.u.def.section,
6490 eh->elf.root.u.def.value,
6491 &rsec, NULL, FALSE) != (bfd_vma) -1)
6492 eh->elf.root.u.def.section->gc_mark = 1;
6493 else
6494 rsec = h->root.u.def.section;
6495 break;
6496
6497 case bfd_link_hash_common:
6498 rsec = h->root.u.c.p->section;
6499 break;
6500
6501 default:
6502 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
6503 }
6504 }
6505 }
6506 else
6507 {
6508 struct _opd_sec_data *opd;
6509
6510 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
6511 opd = get_opd_info (rsec);
6512 if (opd != NULL && opd->func_sec != NULL)
6513 {
6514 rsec->gc_mark = 1;
6515
6516 rsec = opd->func_sec[OPD_NDX (sym->st_value + rel->r_addend)];
6517 }
6518 }
6519
6520 return rsec;
6521 }
6522
6523 /* Update the .got, .plt. and dynamic reloc reference counts for the
6524 section being removed. */
6525
6526 static bfd_boolean
6527 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
6528 asection *sec, const Elf_Internal_Rela *relocs)
6529 {
6530 struct ppc_link_hash_table *htab;
6531 Elf_Internal_Shdr *symtab_hdr;
6532 struct elf_link_hash_entry **sym_hashes;
6533 struct got_entry **local_got_ents;
6534 const Elf_Internal_Rela *rel, *relend;
6535
6536 if (bfd_link_relocatable (info))
6537 return TRUE;
6538
6539 if ((sec->flags & SEC_ALLOC) == 0)
6540 return TRUE;
6541
6542 elf_section_data (sec)->local_dynrel = NULL;
6543
6544 htab = ppc_hash_table (info);
6545 if (htab == NULL)
6546 return FALSE;
6547
6548 symtab_hdr = &elf_symtab_hdr (abfd);
6549 sym_hashes = elf_sym_hashes (abfd);
6550 local_got_ents = elf_local_got_ents (abfd);
6551
6552 relend = relocs + sec->reloc_count;
6553 for (rel = relocs; rel < relend; rel++)
6554 {
6555 unsigned long r_symndx;
6556 enum elf_ppc64_reloc_type r_type;
6557 struct elf_link_hash_entry *h = NULL;
6558 struct plt_entry **plt_list;
6559 unsigned char tls_type = 0;
6560
6561 r_symndx = ELF64_R_SYM (rel->r_info);
6562 r_type = ELF64_R_TYPE (rel->r_info);
6563 if (r_symndx >= symtab_hdr->sh_info)
6564 {
6565 struct ppc_link_hash_entry *eh;
6566 struct elf_dyn_relocs **pp;
6567 struct elf_dyn_relocs *p;
6568
6569 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
6570 h = elf_follow_link (h);
6571 eh = (struct ppc_link_hash_entry *) h;
6572
6573 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
6574 if (p->sec == sec)
6575 {
6576 /* Everything must go for SEC. */
6577 *pp = p->next;
6578 break;
6579 }
6580 }
6581
6582 switch (r_type)
6583 {
6584 case R_PPC64_GOT_TLSLD16:
6585 case R_PPC64_GOT_TLSLD16_LO:
6586 case R_PPC64_GOT_TLSLD16_HI:
6587 case R_PPC64_GOT_TLSLD16_HA:
6588 tls_type = TLS_TLS | TLS_LD;
6589 goto dogot;
6590
6591 case R_PPC64_GOT_TLSGD16:
6592 case R_PPC64_GOT_TLSGD16_LO:
6593 case R_PPC64_GOT_TLSGD16_HI:
6594 case R_PPC64_GOT_TLSGD16_HA:
6595 tls_type = TLS_TLS | TLS_GD;
6596 goto dogot;
6597
6598 case R_PPC64_GOT_TPREL16_DS:
6599 case R_PPC64_GOT_TPREL16_LO_DS:
6600 case R_PPC64_GOT_TPREL16_HI:
6601 case R_PPC64_GOT_TPREL16_HA:
6602 tls_type = TLS_TLS | TLS_TPREL;
6603 goto dogot;
6604
6605 case R_PPC64_GOT_DTPREL16_DS:
6606 case R_PPC64_GOT_DTPREL16_LO_DS:
6607 case R_PPC64_GOT_DTPREL16_HI:
6608 case R_PPC64_GOT_DTPREL16_HA:
6609 tls_type = TLS_TLS | TLS_DTPREL;
6610 goto dogot;
6611
6612 case R_PPC64_GOT16:
6613 case R_PPC64_GOT16_DS:
6614 case R_PPC64_GOT16_HA:
6615 case R_PPC64_GOT16_HI:
6616 case R_PPC64_GOT16_LO:
6617 case R_PPC64_GOT16_LO_DS:
6618 dogot:
6619 {
6620 struct got_entry *ent;
6621
6622 if (h != NULL)
6623 ent = h->got.glist;
6624 else
6625 ent = local_got_ents[r_symndx];
6626
6627 for (; ent != NULL; ent = ent->next)
6628 if (ent->addend == rel->r_addend
6629 && ent->owner == abfd
6630 && ent->tls_type == tls_type)
6631 break;
6632 if (ent == NULL)
6633 abort ();
6634 if (ent->got.refcount > 0)
6635 ent->got.refcount -= 1;
6636 }
6637 break;
6638
6639 case R_PPC64_PLT16_HA:
6640 case R_PPC64_PLT16_HI:
6641 case R_PPC64_PLT16_LO:
6642 case R_PPC64_PLT32:
6643 case R_PPC64_PLT64:
6644 case R_PPC64_REL14:
6645 case R_PPC64_REL14_BRNTAKEN:
6646 case R_PPC64_REL14_BRTAKEN:
6647 case R_PPC64_REL24:
6648 plt_list = NULL;
6649 if (h != NULL)
6650 plt_list = &h->plt.plist;
6651 else if (local_got_ents != NULL)
6652 {
6653 struct plt_entry **local_plt = (struct plt_entry **)
6654 (local_got_ents + symtab_hdr->sh_info);
6655 unsigned char *local_got_tls_masks = (unsigned char *)
6656 (local_plt + symtab_hdr->sh_info);
6657 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
6658 plt_list = local_plt + r_symndx;
6659 }
6660 if (plt_list)
6661 {
6662 struct plt_entry *ent;
6663
6664 for (ent = *plt_list; ent != NULL; ent = ent->next)
6665 if (ent->addend == rel->r_addend)
6666 break;
6667 if (ent != NULL && ent->plt.refcount > 0)
6668 ent->plt.refcount -= 1;
6669 }
6670 break;
6671
6672 default:
6673 break;
6674 }
6675 }
6676 return TRUE;
6677 }
6678
6679 /* The maximum size of .sfpr. */
6680 #define SFPR_MAX (218*4)
6681
6682 struct sfpr_def_parms
6683 {
6684 const char name[12];
6685 unsigned char lo, hi;
6686 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
6687 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
6688 };
6689
6690 /* Auto-generate _save*, _rest* functions in .sfpr.
6691 If STUB_SEC is non-null, define alias symbols in STUB_SEC
6692 instead. */
6693
6694 static bfd_boolean
6695 sfpr_define (struct bfd_link_info *info,
6696 const struct sfpr_def_parms *parm,
6697 asection *stub_sec)
6698 {
6699 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6700 unsigned int i;
6701 size_t len = strlen (parm->name);
6702 bfd_boolean writing = FALSE;
6703 char sym[16];
6704
6705 if (htab == NULL)
6706 return FALSE;
6707
6708 memcpy (sym, parm->name, len);
6709 sym[len + 2] = 0;
6710
6711 for (i = parm->lo; i <= parm->hi; i++)
6712 {
6713 struct ppc_link_hash_entry *h;
6714
6715 sym[len + 0] = i / 10 + '0';
6716 sym[len + 1] = i % 10 + '0';
6717 h = (struct ppc_link_hash_entry *)
6718 elf_link_hash_lookup (&htab->elf, sym, writing, TRUE, TRUE);
6719 if (stub_sec != NULL)
6720 {
6721 if (h != NULL
6722 && h->elf.root.type == bfd_link_hash_defined
6723 && h->elf.root.u.def.section == htab->sfpr)
6724 {
6725 struct elf_link_hash_entry *s;
6726 char buf[32];
6727 sprintf (buf, "%08x.%s", stub_sec->id & 0xffffffff, sym);
6728 s = elf_link_hash_lookup (&htab->elf, buf, TRUE, TRUE, FALSE);
6729 if (s == NULL)
6730 return FALSE;
6731 if (s->root.type == bfd_link_hash_new
6732 || (s->root.type = bfd_link_hash_defined
6733 && s->root.u.def.section == stub_sec))
6734 {
6735 s->root.type = bfd_link_hash_defined;
6736 s->root.u.def.section = stub_sec;
6737 s->root.u.def.value = (stub_sec->size
6738 + h->elf.root.u.def.value);
6739 s->ref_regular = 1;
6740 s->def_regular = 1;
6741 s->ref_regular_nonweak = 1;
6742 s->forced_local = 1;
6743 s->non_elf = 0;
6744 s->root.linker_def = 1;
6745 }
6746 }
6747 continue;
6748 }
6749 if (h != NULL)
6750 {
6751 h->save_res = 1;
6752 if (!h->elf.def_regular)
6753 {
6754 h->elf.root.type = bfd_link_hash_defined;
6755 h->elf.root.u.def.section = htab->sfpr;
6756 h->elf.root.u.def.value = htab->sfpr->size;
6757 h->elf.type = STT_FUNC;
6758 h->elf.def_regular = 1;
6759 h->elf.non_elf = 0;
6760 _bfd_elf_link_hash_hide_symbol (info, &h->elf, TRUE);
6761 writing = TRUE;
6762 if (htab->sfpr->contents == NULL)
6763 {
6764 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
6765 if (htab->sfpr->contents == NULL)
6766 return FALSE;
6767 }
6768 }
6769 }
6770 if (writing)
6771 {
6772 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
6773 if (i != parm->hi)
6774 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
6775 else
6776 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
6777 htab->sfpr->size = p - htab->sfpr->contents;
6778 }
6779 }
6780
6781 return TRUE;
6782 }
6783
6784 static bfd_byte *
6785 savegpr0 (bfd *abfd, bfd_byte *p, int r)
6786 {
6787 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6788 return p + 4;
6789 }
6790
6791 static bfd_byte *
6792 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
6793 {
6794 p = savegpr0 (abfd, p, r);
6795 bfd_put_32 (abfd, STD_R0_0R1 + STK_LR, p);
6796 p = p + 4;
6797 bfd_put_32 (abfd, BLR, p);
6798 return p + 4;
6799 }
6800
6801 static bfd_byte *
6802 restgpr0 (bfd *abfd, bfd_byte *p, int r)
6803 {
6804 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6805 return p + 4;
6806 }
6807
6808 static bfd_byte *
6809 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
6810 {
6811 bfd_put_32 (abfd, LD_R0_0R1 + STK_LR, p);
6812 p = p + 4;
6813 p = restgpr0 (abfd, p, r);
6814 bfd_put_32 (abfd, MTLR_R0, p);
6815 p = p + 4;
6816 if (r == 29)
6817 {
6818 p = restgpr0 (abfd, p, 30);
6819 p = restgpr0 (abfd, p, 31);
6820 }
6821 bfd_put_32 (abfd, BLR, p);
6822 return p + 4;
6823 }
6824
6825 static bfd_byte *
6826 savegpr1 (bfd *abfd, bfd_byte *p, int r)
6827 {
6828 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6829 return p + 4;
6830 }
6831
6832 static bfd_byte *
6833 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
6834 {
6835 p = savegpr1 (abfd, p, r);
6836 bfd_put_32 (abfd, BLR, p);
6837 return p + 4;
6838 }
6839
6840 static bfd_byte *
6841 restgpr1 (bfd *abfd, bfd_byte *p, int r)
6842 {
6843 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6844 return p + 4;
6845 }
6846
6847 static bfd_byte *
6848 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
6849 {
6850 p = restgpr1 (abfd, p, r);
6851 bfd_put_32 (abfd, BLR, p);
6852 return p + 4;
6853 }
6854
6855 static bfd_byte *
6856 savefpr (bfd *abfd, bfd_byte *p, int r)
6857 {
6858 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6859 return p + 4;
6860 }
6861
6862 static bfd_byte *
6863 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
6864 {
6865 p = savefpr (abfd, p, r);
6866 bfd_put_32 (abfd, STD_R0_0R1 + STK_LR, p);
6867 p = p + 4;
6868 bfd_put_32 (abfd, BLR, p);
6869 return p + 4;
6870 }
6871
6872 static bfd_byte *
6873 restfpr (bfd *abfd, bfd_byte *p, int r)
6874 {
6875 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6876 return p + 4;
6877 }
6878
6879 static bfd_byte *
6880 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
6881 {
6882 bfd_put_32 (abfd, LD_R0_0R1 + STK_LR, p);
6883 p = p + 4;
6884 p = restfpr (abfd, p, r);
6885 bfd_put_32 (abfd, MTLR_R0, p);
6886 p = p + 4;
6887 if (r == 29)
6888 {
6889 p = restfpr (abfd, p, 30);
6890 p = restfpr (abfd, p, 31);
6891 }
6892 bfd_put_32 (abfd, BLR, p);
6893 return p + 4;
6894 }
6895
6896 static bfd_byte *
6897 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
6898 {
6899 p = savefpr (abfd, p, r);
6900 bfd_put_32 (abfd, BLR, p);
6901 return p + 4;
6902 }
6903
6904 static bfd_byte *
6905 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
6906 {
6907 p = restfpr (abfd, p, r);
6908 bfd_put_32 (abfd, BLR, p);
6909 return p + 4;
6910 }
6911
6912 static bfd_byte *
6913 savevr (bfd *abfd, bfd_byte *p, int r)
6914 {
6915 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6916 p = p + 4;
6917 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
6918 return p + 4;
6919 }
6920
6921 static bfd_byte *
6922 savevr_tail (bfd *abfd, bfd_byte *p, int r)
6923 {
6924 p = savevr (abfd, p, r);
6925 bfd_put_32 (abfd, BLR, p);
6926 return p + 4;
6927 }
6928
6929 static bfd_byte *
6930 restvr (bfd *abfd, bfd_byte *p, int r)
6931 {
6932 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6933 p = p + 4;
6934 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
6935 return p + 4;
6936 }
6937
6938 static bfd_byte *
6939 restvr_tail (bfd *abfd, bfd_byte *p, int r)
6940 {
6941 p = restvr (abfd, p, r);
6942 bfd_put_32 (abfd, BLR, p);
6943 return p + 4;
6944 }
6945
6946 /* Called via elf_link_hash_traverse to transfer dynamic linking
6947 information on function code symbol entries to their corresponding
6948 function descriptor symbol entries. */
6949
6950 static bfd_boolean
6951 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
6952 {
6953 struct bfd_link_info *info;
6954 struct ppc_link_hash_table *htab;
6955 struct plt_entry *ent;
6956 struct ppc_link_hash_entry *fh;
6957 struct ppc_link_hash_entry *fdh;
6958 bfd_boolean force_local;
6959
6960 fh = (struct ppc_link_hash_entry *) h;
6961 if (fh->elf.root.type == bfd_link_hash_indirect)
6962 return TRUE;
6963
6964 info = inf;
6965 htab = ppc_hash_table (info);
6966 if (htab == NULL)
6967 return FALSE;
6968
6969 /* Resolve undefined references to dot-symbols as the value
6970 in the function descriptor, if we have one in a regular object.
6971 This is to satisfy cases like ".quad .foo". Calls to functions
6972 in dynamic objects are handled elsewhere. */
6973 if (fh->elf.root.type == bfd_link_hash_undefweak
6974 && fh->was_undefined
6975 && (fdh = defined_func_desc (fh)) != NULL
6976 && get_opd_info (fdh->elf.root.u.def.section) != NULL
6977 && opd_entry_value (fdh->elf.root.u.def.section,
6978 fdh->elf.root.u.def.value,
6979 &fh->elf.root.u.def.section,
6980 &fh->elf.root.u.def.value, FALSE) != (bfd_vma) -1)
6981 {
6982 fh->elf.root.type = fdh->elf.root.type;
6983 fh->elf.forced_local = 1;
6984 fh->elf.def_regular = fdh->elf.def_regular;
6985 fh->elf.def_dynamic = fdh->elf.def_dynamic;
6986 }
6987
6988 /* If this is a function code symbol, transfer dynamic linking
6989 information to the function descriptor symbol. */
6990 if (!fh->is_func)
6991 return TRUE;
6992
6993 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
6994 if (ent->plt.refcount > 0)
6995 break;
6996 if (ent == NULL
6997 || fh->elf.root.root.string[0] != '.'
6998 || fh->elf.root.root.string[1] == '\0')
6999 return TRUE;
7000
7001 /* Find the corresponding function descriptor symbol. Create it
7002 as undefined if necessary. */
7003
7004 fdh = lookup_fdh (fh, htab);
7005 if (fdh == NULL
7006 && !bfd_link_executable (info)
7007 && (fh->elf.root.type == bfd_link_hash_undefined
7008 || fh->elf.root.type == bfd_link_hash_undefweak))
7009 {
7010 fdh = make_fdh (info, fh);
7011 if (fdh == NULL)
7012 return FALSE;
7013 }
7014
7015 /* Fake function descriptors are made undefweak. If the function
7016 code symbol is strong undefined, make the fake sym the same.
7017 If the function code symbol is defined, then force the fake
7018 descriptor local; We can't support overriding of symbols in a
7019 shared library on a fake descriptor. */
7020
7021 if (fdh != NULL
7022 && fdh->fake
7023 && fdh->elf.root.type == bfd_link_hash_undefweak)
7024 {
7025 if (fh->elf.root.type == bfd_link_hash_undefined)
7026 {
7027 fdh->elf.root.type = bfd_link_hash_undefined;
7028 bfd_link_add_undef (&htab->elf.root, &fdh->elf.root);
7029 }
7030 else if (fh->elf.root.type == bfd_link_hash_defined
7031 || fh->elf.root.type == bfd_link_hash_defweak)
7032 {
7033 _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE);
7034 }
7035 }
7036
7037 if (fdh != NULL
7038 && !fdh->elf.forced_local
7039 && (!bfd_link_executable (info)
7040 || fdh->elf.def_dynamic
7041 || fdh->elf.ref_dynamic
7042 || (fdh->elf.root.type == bfd_link_hash_undefweak
7043 && ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT)))
7044 {
7045 if (fdh->elf.dynindx == -1)
7046 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
7047 return FALSE;
7048 fdh->elf.ref_regular |= fh->elf.ref_regular;
7049 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
7050 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
7051 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
7052 if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT)
7053 {
7054 move_plt_plist (fh, fdh);
7055 fdh->elf.needs_plt = 1;
7056 }
7057 fdh->is_func_descriptor = 1;
7058 fdh->oh = fh;
7059 fh->oh = fdh;
7060 }
7061
7062 /* Now that the info is on the function descriptor, clear the
7063 function code sym info. Any function code syms for which we
7064 don't have a definition in a regular file, we force local.
7065 This prevents a shared library from exporting syms that have
7066 been imported from another library. Function code syms that
7067 are really in the library we must leave global to prevent the
7068 linker dragging in a definition from a static library. */
7069 force_local = (!fh->elf.def_regular
7070 || fdh == NULL
7071 || !fdh->elf.def_regular
7072 || fdh->elf.forced_local);
7073 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
7074
7075 return TRUE;
7076 }
7077
7078 static const struct sfpr_def_parms save_res_funcs[] =
7079 {
7080 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
7081 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
7082 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
7083 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
7084 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
7085 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
7086 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
7087 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
7088 { "._savef", 14, 31, savefpr, savefpr1_tail },
7089 { "._restf", 14, 31, restfpr, restfpr1_tail },
7090 { "_savevr_", 20, 31, savevr, savevr_tail },
7091 { "_restvr_", 20, 31, restvr, restvr_tail }
7092 };
7093
7094 /* Called near the start of bfd_elf_size_dynamic_sections. We use
7095 this hook to a) provide some gcc support functions, and b) transfer
7096 dynamic linking information gathered so far on function code symbol
7097 entries, to their corresponding function descriptor symbol entries. */
7098
7099 static bfd_boolean
7100 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
7101 struct bfd_link_info *info)
7102 {
7103 struct ppc_link_hash_table *htab;
7104
7105 htab = ppc_hash_table (info);
7106 if (htab == NULL)
7107 return FALSE;
7108
7109 /* Provide any missing _save* and _rest* functions. */
7110 if (htab->sfpr != NULL)
7111 {
7112 unsigned int i;
7113
7114 htab->sfpr->size = 0;
7115 for (i = 0; i < ARRAY_SIZE (save_res_funcs); i++)
7116 if (!sfpr_define (info, &save_res_funcs[i], NULL))
7117 return FALSE;
7118 if (htab->sfpr->size == 0)
7119 htab->sfpr->flags |= SEC_EXCLUDE;
7120 }
7121
7122 if (bfd_link_relocatable (info))
7123 return TRUE;
7124
7125 if (htab->elf.hgot != NULL)
7126 {
7127 _bfd_elf_link_hash_hide_symbol (info, htab->elf.hgot, TRUE);
7128 /* Make .TOC. defined so as to prevent it being made dynamic.
7129 The wrong value here is fixed later in ppc64_elf_set_toc. */
7130 if (!htab->elf.hgot->def_regular
7131 || htab->elf.hgot->root.type != bfd_link_hash_defined)
7132 {
7133 htab->elf.hgot->root.type = bfd_link_hash_defined;
7134 htab->elf.hgot->root.u.def.value = 0;
7135 htab->elf.hgot->root.u.def.section = bfd_abs_section_ptr;
7136 htab->elf.hgot->def_regular = 1;
7137 htab->elf.hgot->root.linker_def = 1;
7138 }
7139 htab->elf.hgot->type = STT_OBJECT;
7140 htab->elf.hgot->other = ((htab->elf.hgot->other & ~ELF_ST_VISIBILITY (-1))
7141 | STV_HIDDEN);
7142 }
7143
7144 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
7145
7146 return TRUE;
7147 }
7148
7149 /* Return true if we have dynamic relocs against H that apply to
7150 read-only sections. */
7151
7152 static bfd_boolean
7153 readonly_dynrelocs (struct elf_link_hash_entry *h)
7154 {
7155 struct ppc_link_hash_entry *eh;
7156 struct elf_dyn_relocs *p;
7157
7158 eh = (struct ppc_link_hash_entry *) h;
7159 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7160 {
7161 asection *s = p->sec->output_section;
7162
7163 if (s != NULL && (s->flags & SEC_READONLY) != 0)
7164 return TRUE;
7165 }
7166 return FALSE;
7167 }
7168
7169 /* Return true if we have dynamic relocs against H or any of its weak
7170 aliases, that apply to read-only sections. */
7171
7172 static bfd_boolean
7173 alias_readonly_dynrelocs (struct elf_link_hash_entry *h)
7174 {
7175 struct ppc_link_hash_entry *eh;
7176
7177 eh = (struct ppc_link_hash_entry *) h;
7178 do
7179 {
7180 if (readonly_dynrelocs (&eh->elf))
7181 return TRUE;
7182 eh = eh->weakref;
7183 } while (eh != NULL && &eh->elf != h);
7184
7185 return FALSE;
7186 }
7187
7188 /* Return whether EH has pc-relative dynamic relocs. */
7189
7190 static bfd_boolean
7191 pc_dynrelocs (struct ppc_link_hash_entry *eh)
7192 {
7193 struct elf_dyn_relocs *p;
7194
7195 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7196 if (p->pc_count != 0)
7197 return TRUE;
7198 return FALSE;
7199 }
7200
7201 /* Return true if a global entry stub will be created for H. Valid
7202 for ELFv2 before plt entries have been allocated. */
7203
7204 static bfd_boolean
7205 global_entry_stub (struct elf_link_hash_entry *h)
7206 {
7207 struct plt_entry *pent;
7208
7209 if (!h->pointer_equality_needed
7210 || h->def_regular)
7211 return FALSE;
7212
7213 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
7214 if (pent->plt.refcount > 0
7215 && pent->addend == 0)
7216 return TRUE;
7217
7218 return FALSE;
7219 }
7220
7221 /* Adjust a symbol defined by a dynamic object and referenced by a
7222 regular object. The current definition is in some section of the
7223 dynamic object, but we're not including those sections. We have to
7224 change the definition to something the rest of the link can
7225 understand. */
7226
7227 static bfd_boolean
7228 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
7229 struct elf_link_hash_entry *h)
7230 {
7231 struct ppc_link_hash_table *htab;
7232 asection *s;
7233
7234 htab = ppc_hash_table (info);
7235 if (htab == NULL)
7236 return FALSE;
7237
7238 /* Deal with function syms. */
7239 if (h->type == STT_FUNC
7240 || h->type == STT_GNU_IFUNC
7241 || h->needs_plt)
7242 {
7243 /* Clear procedure linkage table information for any symbol that
7244 won't need a .plt entry. */
7245 struct plt_entry *ent;
7246 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
7247 if (ent->plt.refcount > 0)
7248 break;
7249 if (ent == NULL
7250 || (h->type != STT_GNU_IFUNC
7251 && (SYMBOL_CALLS_LOCAL (info, h)
7252 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
7253 && h->root.type == bfd_link_hash_undefweak)))
7254 || ((struct ppc_link_hash_entry *) h)->save_res)
7255 {
7256 h->plt.plist = NULL;
7257 h->needs_plt = 0;
7258 h->pointer_equality_needed = 0;
7259 }
7260 else if (abiversion (info->output_bfd) >= 2)
7261 {
7262 /* Taking a function's address in a read/write section
7263 doesn't require us to define the function symbol in the
7264 executable on a global entry stub. A dynamic reloc can
7265 be used instead. The reason we prefer a few more dynamic
7266 relocs is that calling via a global entry stub costs a
7267 few more instructions, and pointer_equality_needed causes
7268 extra work in ld.so when resolving these symbols. */
7269 if (global_entry_stub (h)
7270 && !alias_readonly_dynrelocs (h))
7271 {
7272 h->pointer_equality_needed = 0;
7273 /* After adjust_dynamic_symbol, non_got_ref set in
7274 the non-pic case means that dyn_relocs for this
7275 symbol should be discarded. */
7276 h->non_got_ref = 0;
7277 }
7278
7279 /* If making a plt entry, then we don't need copy relocs. */
7280 return TRUE;
7281 }
7282 }
7283 else
7284 h->plt.plist = NULL;
7285
7286 /* If this is a weak symbol, and there is a real definition, the
7287 processor independent code will have arranged for us to see the
7288 real definition first, and we can just use the same value. */
7289 if (h->u.weakdef != NULL)
7290 {
7291 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
7292 || h->u.weakdef->root.type == bfd_link_hash_defweak);
7293 h->root.u.def.section = h->u.weakdef->root.u.def.section;
7294 h->root.u.def.value = h->u.weakdef->root.u.def.value;
7295 if (ELIMINATE_COPY_RELOCS)
7296 h->non_got_ref = h->u.weakdef->non_got_ref;
7297 return TRUE;
7298 }
7299
7300 /* If we are creating a shared library, we must presume that the
7301 only references to the symbol are via the global offset table.
7302 For such cases we need not do anything here; the relocations will
7303 be handled correctly by relocate_section. */
7304 if (bfd_link_pic (info))
7305 return TRUE;
7306
7307 /* If there are no references to this symbol that do not use the
7308 GOT, we don't need to generate a copy reloc. */
7309 if (!h->non_got_ref)
7310 return TRUE;
7311
7312 /* Don't generate a copy reloc for symbols defined in the executable. */
7313 if (!h->def_dynamic || !h->ref_regular || h->def_regular
7314
7315 /* If -z nocopyreloc was given, don't generate them either. */
7316 || info->nocopyreloc
7317
7318 /* If we didn't find any dynamic relocs in read-only sections, then
7319 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
7320 || (ELIMINATE_COPY_RELOCS && !alias_readonly_dynrelocs (h))
7321
7322 /* Protected variables do not work with .dynbss. The copy in
7323 .dynbss won't be used by the shared library with the protected
7324 definition for the variable. Text relocations are preferable
7325 to an incorrect program. */
7326 || h->protected_def)
7327 {
7328 h->non_got_ref = 0;
7329 return TRUE;
7330 }
7331
7332 if (h->plt.plist != NULL)
7333 {
7334 /* We should never get here, but unfortunately there are versions
7335 of gcc out there that improperly (for this ABI) put initialized
7336 function pointers, vtable refs and suchlike in read-only
7337 sections. Allow them to proceed, but warn that this might
7338 break at runtime. */
7339 info->callbacks->einfo
7340 (_("%P: copy reloc against `%T' requires lazy plt linking; "
7341 "avoid setting LD_BIND_NOW=1 or upgrade gcc\n"),
7342 h->root.root.string);
7343 }
7344
7345 /* This is a reference to a symbol defined by a dynamic object which
7346 is not a function. */
7347
7348 /* We must allocate the symbol in our .dynbss section, which will
7349 become part of the .bss section of the executable. There will be
7350 an entry for this symbol in the .dynsym section. The dynamic
7351 object will contain position independent code, so all references
7352 from the dynamic object to this symbol will go through the global
7353 offset table. The dynamic linker will use the .dynsym entry to
7354 determine the address it must put in the global offset table, so
7355 both the dynamic object and the regular object will refer to the
7356 same memory location for the variable. */
7357
7358 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
7359 to copy the initial value out of the dynamic object and into the
7360 runtime process image. We need to remember the offset into the
7361 .rela.bss section we are going to use. */
7362 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
7363 {
7364 htab->relbss->size += sizeof (Elf64_External_Rela);
7365 h->needs_copy = 1;
7366 }
7367
7368 s = htab->dynbss;
7369
7370 return _bfd_elf_adjust_dynamic_copy (info, h, s);
7371 }
7372
7373 /* If given a function descriptor symbol, hide both the function code
7374 sym and the descriptor. */
7375 static void
7376 ppc64_elf_hide_symbol (struct bfd_link_info *info,
7377 struct elf_link_hash_entry *h,
7378 bfd_boolean force_local)
7379 {
7380 struct ppc_link_hash_entry *eh;
7381 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
7382
7383 eh = (struct ppc_link_hash_entry *) h;
7384 if (eh->is_func_descriptor)
7385 {
7386 struct ppc_link_hash_entry *fh = eh->oh;
7387
7388 if (fh == NULL)
7389 {
7390 const char *p, *q;
7391 struct ppc_link_hash_table *htab;
7392 char save;
7393
7394 /* We aren't supposed to use alloca in BFD because on
7395 systems which do not have alloca the version in libiberty
7396 calls xmalloc, which might cause the program to crash
7397 when it runs out of memory. This function doesn't have a
7398 return status, so there's no way to gracefully return an
7399 error. So cheat. We know that string[-1] can be safely
7400 accessed; It's either a string in an ELF string table,
7401 or allocated in an objalloc structure. */
7402
7403 p = eh->elf.root.root.string - 1;
7404 save = *p;
7405 *(char *) p = '.';
7406 htab = ppc_hash_table (info);
7407 if (htab == NULL)
7408 return;
7409
7410 fh = (struct ppc_link_hash_entry *)
7411 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
7412 *(char *) p = save;
7413
7414 /* Unfortunately, if it so happens that the string we were
7415 looking for was allocated immediately before this string,
7416 then we overwrote the string terminator. That's the only
7417 reason the lookup should fail. */
7418 if (fh == NULL)
7419 {
7420 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
7421 while (q >= eh->elf.root.root.string && *q == *p)
7422 --q, --p;
7423 if (q < eh->elf.root.root.string && *p == '.')
7424 fh = (struct ppc_link_hash_entry *)
7425 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
7426 }
7427 if (fh != NULL)
7428 {
7429 eh->oh = fh;
7430 fh->oh = eh;
7431 }
7432 }
7433 if (fh != NULL)
7434 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
7435 }
7436 }
7437
7438 static bfd_boolean
7439 get_sym_h (struct elf_link_hash_entry **hp,
7440 Elf_Internal_Sym **symp,
7441 asection **symsecp,
7442 unsigned char **tls_maskp,
7443 Elf_Internal_Sym **locsymsp,
7444 unsigned long r_symndx,
7445 bfd *ibfd)
7446 {
7447 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
7448
7449 if (r_symndx >= symtab_hdr->sh_info)
7450 {
7451 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
7452 struct elf_link_hash_entry *h;
7453
7454 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
7455 h = elf_follow_link (h);
7456
7457 if (hp != NULL)
7458 *hp = h;
7459
7460 if (symp != NULL)
7461 *symp = NULL;
7462
7463 if (symsecp != NULL)
7464 {
7465 asection *symsec = NULL;
7466 if (h->root.type == bfd_link_hash_defined
7467 || h->root.type == bfd_link_hash_defweak)
7468 symsec = h->root.u.def.section;
7469 *symsecp = symsec;
7470 }
7471
7472 if (tls_maskp != NULL)
7473 {
7474 struct ppc_link_hash_entry *eh;
7475
7476 eh = (struct ppc_link_hash_entry *) h;
7477 *tls_maskp = &eh->tls_mask;
7478 }
7479 }
7480 else
7481 {
7482 Elf_Internal_Sym *sym;
7483 Elf_Internal_Sym *locsyms = *locsymsp;
7484
7485 if (locsyms == NULL)
7486 {
7487 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
7488 if (locsyms == NULL)
7489 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
7490 symtab_hdr->sh_info,
7491 0, NULL, NULL, NULL);
7492 if (locsyms == NULL)
7493 return FALSE;
7494 *locsymsp = locsyms;
7495 }
7496 sym = locsyms + r_symndx;
7497
7498 if (hp != NULL)
7499 *hp = NULL;
7500
7501 if (symp != NULL)
7502 *symp = sym;
7503
7504 if (symsecp != NULL)
7505 *symsecp = bfd_section_from_elf_index (ibfd, sym->st_shndx);
7506
7507 if (tls_maskp != NULL)
7508 {
7509 struct got_entry **lgot_ents;
7510 unsigned char *tls_mask;
7511
7512 tls_mask = NULL;
7513 lgot_ents = elf_local_got_ents (ibfd);
7514 if (lgot_ents != NULL)
7515 {
7516 struct plt_entry **local_plt = (struct plt_entry **)
7517 (lgot_ents + symtab_hdr->sh_info);
7518 unsigned char *lgot_masks = (unsigned char *)
7519 (local_plt + symtab_hdr->sh_info);
7520 tls_mask = &lgot_masks[r_symndx];
7521 }
7522 *tls_maskp = tls_mask;
7523 }
7524 }
7525 return TRUE;
7526 }
7527
7528 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
7529 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
7530 type suitable for optimization, and 1 otherwise. */
7531
7532 static int
7533 get_tls_mask (unsigned char **tls_maskp,
7534 unsigned long *toc_symndx,
7535 bfd_vma *toc_addend,
7536 Elf_Internal_Sym **locsymsp,
7537 const Elf_Internal_Rela *rel,
7538 bfd *ibfd)
7539 {
7540 unsigned long r_symndx;
7541 int next_r;
7542 struct elf_link_hash_entry *h;
7543 Elf_Internal_Sym *sym;
7544 asection *sec;
7545 bfd_vma off;
7546
7547 r_symndx = ELF64_R_SYM (rel->r_info);
7548 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
7549 return 0;
7550
7551 if ((*tls_maskp != NULL && **tls_maskp != 0)
7552 || sec == NULL
7553 || ppc64_elf_section_data (sec) == NULL
7554 || ppc64_elf_section_data (sec)->sec_type != sec_toc)
7555 return 1;
7556
7557 /* Look inside a TOC section too. */
7558 if (h != NULL)
7559 {
7560 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
7561 off = h->root.u.def.value;
7562 }
7563 else
7564 off = sym->st_value;
7565 off += rel->r_addend;
7566 BFD_ASSERT (off % 8 == 0);
7567 r_symndx = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8];
7568 next_r = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8 + 1];
7569 if (toc_symndx != NULL)
7570 *toc_symndx = r_symndx;
7571 if (toc_addend != NULL)
7572 *toc_addend = ppc64_elf_section_data (sec)->u.toc.add[off / 8];
7573 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
7574 return 0;
7575 if ((h == NULL || is_static_defined (h))
7576 && (next_r == -1 || next_r == -2))
7577 return 1 - next_r;
7578 return 1;
7579 }
7580
7581 /* Find (or create) an entry in the tocsave hash table. */
7582
7583 static struct tocsave_entry *
7584 tocsave_find (struct ppc_link_hash_table *htab,
7585 enum insert_option insert,
7586 Elf_Internal_Sym **local_syms,
7587 const Elf_Internal_Rela *irela,
7588 bfd *ibfd)
7589 {
7590 unsigned long r_indx;
7591 struct elf_link_hash_entry *h;
7592 Elf_Internal_Sym *sym;
7593 struct tocsave_entry ent, *p;
7594 hashval_t hash;
7595 struct tocsave_entry **slot;
7596
7597 r_indx = ELF64_R_SYM (irela->r_info);
7598 if (!get_sym_h (&h, &sym, &ent.sec, NULL, local_syms, r_indx, ibfd))
7599 return NULL;
7600 if (ent.sec == NULL || ent.sec->output_section == NULL)
7601 {
7602 _bfd_error_handler
7603 (_("%B: undefined symbol on R_PPC64_TOCSAVE relocation"));
7604 return NULL;
7605 }
7606
7607 if (h != NULL)
7608 ent.offset = h->root.u.def.value;
7609 else
7610 ent.offset = sym->st_value;
7611 ent.offset += irela->r_addend;
7612
7613 hash = tocsave_htab_hash (&ent);
7614 slot = ((struct tocsave_entry **)
7615 htab_find_slot_with_hash (htab->tocsave_htab, &ent, hash, insert));
7616 if (slot == NULL)
7617 return NULL;
7618
7619 if (*slot == NULL)
7620 {
7621 p = (struct tocsave_entry *) bfd_alloc (ibfd, sizeof (*p));
7622 if (p == NULL)
7623 return NULL;
7624 *p = ent;
7625 *slot = p;
7626 }
7627 return *slot;
7628 }
7629
7630 /* Adjust all global syms defined in opd sections. In gcc generated
7631 code for the old ABI, these will already have been done. */
7632
7633 static bfd_boolean
7634 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
7635 {
7636 struct ppc_link_hash_entry *eh;
7637 asection *sym_sec;
7638 struct _opd_sec_data *opd;
7639
7640 if (h->root.type == bfd_link_hash_indirect)
7641 return TRUE;
7642
7643 if (h->root.type != bfd_link_hash_defined
7644 && h->root.type != bfd_link_hash_defweak)
7645 return TRUE;
7646
7647 eh = (struct ppc_link_hash_entry *) h;
7648 if (eh->adjust_done)
7649 return TRUE;
7650
7651 sym_sec = eh->elf.root.u.def.section;
7652 opd = get_opd_info (sym_sec);
7653 if (opd != NULL && opd->adjust != NULL)
7654 {
7655 long adjust = opd->adjust[OPD_NDX (eh->elf.root.u.def.value)];
7656 if (adjust == -1)
7657 {
7658 /* This entry has been deleted. */
7659 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
7660 if (dsec == NULL)
7661 {
7662 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
7663 if (discarded_section (dsec))
7664 {
7665 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
7666 break;
7667 }
7668 }
7669 eh->elf.root.u.def.value = 0;
7670 eh->elf.root.u.def.section = dsec;
7671 }
7672 else
7673 eh->elf.root.u.def.value += adjust;
7674 eh->adjust_done = 1;
7675 }
7676 return TRUE;
7677 }
7678
7679 /* Handles decrementing dynamic reloc counts for the reloc specified by
7680 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM
7681 have already been determined. */
7682
7683 static bfd_boolean
7684 dec_dynrel_count (bfd_vma r_info,
7685 asection *sec,
7686 struct bfd_link_info *info,
7687 Elf_Internal_Sym **local_syms,
7688 struct elf_link_hash_entry *h,
7689 Elf_Internal_Sym *sym)
7690 {
7691 enum elf_ppc64_reloc_type r_type;
7692 asection *sym_sec = NULL;
7693
7694 /* Can this reloc be dynamic? This switch, and later tests here
7695 should be kept in sync with the code in check_relocs. */
7696 r_type = ELF64_R_TYPE (r_info);
7697 switch (r_type)
7698 {
7699 default:
7700 return TRUE;
7701
7702 case R_PPC64_TPREL16:
7703 case R_PPC64_TPREL16_LO:
7704 case R_PPC64_TPREL16_HI:
7705 case R_PPC64_TPREL16_HA:
7706 case R_PPC64_TPREL16_DS:
7707 case R_PPC64_TPREL16_LO_DS:
7708 case R_PPC64_TPREL16_HIGH:
7709 case R_PPC64_TPREL16_HIGHA:
7710 case R_PPC64_TPREL16_HIGHER:
7711 case R_PPC64_TPREL16_HIGHERA:
7712 case R_PPC64_TPREL16_HIGHEST:
7713 case R_PPC64_TPREL16_HIGHESTA:
7714 if (!bfd_link_pic (info))
7715 return TRUE;
7716
7717 case R_PPC64_TPREL64:
7718 case R_PPC64_DTPMOD64:
7719 case R_PPC64_DTPREL64:
7720 case R_PPC64_ADDR64:
7721 case R_PPC64_REL30:
7722 case R_PPC64_REL32:
7723 case R_PPC64_REL64:
7724 case R_PPC64_ADDR14:
7725 case R_PPC64_ADDR14_BRNTAKEN:
7726 case R_PPC64_ADDR14_BRTAKEN:
7727 case R_PPC64_ADDR16:
7728 case R_PPC64_ADDR16_DS:
7729 case R_PPC64_ADDR16_HA:
7730 case R_PPC64_ADDR16_HI:
7731 case R_PPC64_ADDR16_HIGH:
7732 case R_PPC64_ADDR16_HIGHA:
7733 case R_PPC64_ADDR16_HIGHER:
7734 case R_PPC64_ADDR16_HIGHERA:
7735 case R_PPC64_ADDR16_HIGHEST:
7736 case R_PPC64_ADDR16_HIGHESTA:
7737 case R_PPC64_ADDR16_LO:
7738 case R_PPC64_ADDR16_LO_DS:
7739 case R_PPC64_ADDR24:
7740 case R_PPC64_ADDR32:
7741 case R_PPC64_UADDR16:
7742 case R_PPC64_UADDR32:
7743 case R_PPC64_UADDR64:
7744 case R_PPC64_TOC:
7745 break;
7746 }
7747
7748 if (local_syms != NULL)
7749 {
7750 unsigned long r_symndx;
7751 bfd *ibfd = sec->owner;
7752
7753 r_symndx = ELF64_R_SYM (r_info);
7754 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
7755 return FALSE;
7756 }
7757
7758 if ((bfd_link_pic (info)
7759 && (must_be_dyn_reloc (info, r_type)
7760 || (h != NULL
7761 && (!SYMBOLIC_BIND (info, h)
7762 || h->root.type == bfd_link_hash_defweak
7763 || !h->def_regular))))
7764 || (ELIMINATE_COPY_RELOCS
7765 && !bfd_link_pic (info)
7766 && h != NULL
7767 && (h->root.type == bfd_link_hash_defweak
7768 || !h->def_regular)))
7769 ;
7770 else
7771 return TRUE;
7772
7773 if (h != NULL)
7774 {
7775 struct elf_dyn_relocs *p;
7776 struct elf_dyn_relocs **pp;
7777 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
7778
7779 /* elf_gc_sweep may have already removed all dyn relocs associated
7780 with local syms for a given section. Also, symbol flags are
7781 changed by elf_gc_sweep_symbol, confusing the test above. Don't
7782 report a dynreloc miscount. */
7783 if (*pp == NULL && info->gc_sections)
7784 return TRUE;
7785
7786 while ((p = *pp) != NULL)
7787 {
7788 if (p->sec == sec)
7789 {
7790 if (!must_be_dyn_reloc (info, r_type))
7791 p->pc_count -= 1;
7792 p->count -= 1;
7793 if (p->count == 0)
7794 *pp = p->next;
7795 return TRUE;
7796 }
7797 pp = &p->next;
7798 }
7799 }
7800 else
7801 {
7802 struct ppc_dyn_relocs *p;
7803 struct ppc_dyn_relocs **pp;
7804 void *vpp;
7805 bfd_boolean is_ifunc;
7806
7807 if (local_syms == NULL)
7808 sym_sec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
7809 if (sym_sec == NULL)
7810 sym_sec = sec;
7811
7812 vpp = &elf_section_data (sym_sec)->local_dynrel;
7813 pp = (struct ppc_dyn_relocs **) vpp;
7814
7815 if (*pp == NULL && info->gc_sections)
7816 return TRUE;
7817
7818 is_ifunc = ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC;
7819 while ((p = *pp) != NULL)
7820 {
7821 if (p->sec == sec && p->ifunc == is_ifunc)
7822 {
7823 p->count -= 1;
7824 if (p->count == 0)
7825 *pp = p->next;
7826 return TRUE;
7827 }
7828 pp = &p->next;
7829 }
7830 }
7831
7832 info->callbacks->einfo (_("%P: dynreloc miscount for %B, section %A\n"),
7833 sec->owner, sec);
7834 bfd_set_error (bfd_error_bad_value);
7835 return FALSE;
7836 }
7837
7838 /* Remove unused Official Procedure Descriptor entries. Currently we
7839 only remove those associated with functions in discarded link-once
7840 sections, or weakly defined functions that have been overridden. It
7841 would be possible to remove many more entries for statically linked
7842 applications. */
7843
7844 bfd_boolean
7845 ppc64_elf_edit_opd (struct bfd_link_info *info)
7846 {
7847 bfd *ibfd;
7848 bfd_boolean some_edited = FALSE;
7849 asection *need_pad = NULL;
7850 struct ppc_link_hash_table *htab;
7851
7852 htab = ppc_hash_table (info);
7853 if (htab == NULL)
7854 return FALSE;
7855
7856 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
7857 {
7858 asection *sec;
7859 Elf_Internal_Rela *relstart, *rel, *relend;
7860 Elf_Internal_Shdr *symtab_hdr;
7861 Elf_Internal_Sym *local_syms;
7862 struct _opd_sec_data *opd;
7863 bfd_boolean need_edit, add_aux_fields, broken;
7864 bfd_size_type cnt_16b = 0;
7865
7866 if (!is_ppc64_elf (ibfd))
7867 continue;
7868
7869 sec = bfd_get_section_by_name (ibfd, ".opd");
7870 if (sec == NULL || sec->size == 0)
7871 continue;
7872
7873 if (sec->sec_info_type == SEC_INFO_TYPE_JUST_SYMS)
7874 continue;
7875
7876 if (sec->output_section == bfd_abs_section_ptr)
7877 continue;
7878
7879 /* Look through the section relocs. */
7880 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
7881 continue;
7882
7883 local_syms = NULL;
7884 symtab_hdr = &elf_symtab_hdr (ibfd);
7885
7886 /* Read the relocations. */
7887 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7888 info->keep_memory);
7889 if (relstart == NULL)
7890 return FALSE;
7891
7892 /* First run through the relocs to check they are sane, and to
7893 determine whether we need to edit this opd section. */
7894 need_edit = FALSE;
7895 broken = FALSE;
7896 need_pad = sec;
7897 relend = relstart + sec->reloc_count;
7898 for (rel = relstart; rel < relend; )
7899 {
7900 enum elf_ppc64_reloc_type r_type;
7901 unsigned long r_symndx;
7902 asection *sym_sec;
7903 struct elf_link_hash_entry *h;
7904 Elf_Internal_Sym *sym;
7905 bfd_vma offset;
7906
7907 /* .opd contains an array of 16 or 24 byte entries. We're
7908 only interested in the reloc pointing to a function entry
7909 point. */
7910 offset = rel->r_offset;
7911 if (rel + 1 == relend
7912 || rel[1].r_offset != offset + 8)
7913 {
7914 /* If someone messes with .opd alignment then after a
7915 "ld -r" we might have padding in the middle of .opd.
7916 Also, there's nothing to prevent someone putting
7917 something silly in .opd with the assembler. No .opd
7918 optimization for them! */
7919 broken_opd:
7920 _bfd_error_handler
7921 (_("%B: .opd is not a regular array of opd entries"), ibfd);
7922 broken = TRUE;
7923 break;
7924 }
7925
7926 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
7927 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
7928 {
7929 _bfd_error_handler
7930 (_("%B: unexpected reloc type %u in .opd section"),
7931 ibfd, r_type);
7932 broken = TRUE;
7933 break;
7934 }
7935
7936 r_symndx = ELF64_R_SYM (rel->r_info);
7937 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7938 r_symndx, ibfd))
7939 goto error_ret;
7940
7941 if (sym_sec == NULL || sym_sec->owner == NULL)
7942 {
7943 const char *sym_name;
7944 if (h != NULL)
7945 sym_name = h->root.root.string;
7946 else
7947 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
7948 sym_sec);
7949
7950 _bfd_error_handler
7951 (_("%B: undefined sym `%s' in .opd section"),
7952 ibfd, sym_name);
7953 broken = TRUE;
7954 break;
7955 }
7956
7957 /* opd entries are always for functions defined in the
7958 current input bfd. If the symbol isn't defined in the
7959 input bfd, then we won't be using the function in this
7960 bfd; It must be defined in a linkonce section in another
7961 bfd, or is weak. It's also possible that we are
7962 discarding the function due to a linker script /DISCARD/,
7963 which we test for via the output_section. */
7964 if (sym_sec->owner != ibfd
7965 || sym_sec->output_section == bfd_abs_section_ptr)
7966 need_edit = TRUE;
7967
7968 rel += 2;
7969 if (rel + 1 == relend
7970 || (rel + 2 < relend
7971 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC))
7972 ++rel;
7973
7974 if (rel == relend)
7975 {
7976 if (sec->size == offset + 24)
7977 {
7978 need_pad = NULL;
7979 break;
7980 }
7981 if (sec->size == offset + 16)
7982 {
7983 cnt_16b++;
7984 break;
7985 }
7986 goto broken_opd;
7987 }
7988 else if (rel + 1 < relend
7989 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
7990 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
7991 {
7992 if (rel[0].r_offset == offset + 16)
7993 cnt_16b++;
7994 else if (rel[0].r_offset != offset + 24)
7995 goto broken_opd;
7996 }
7997 else
7998 goto broken_opd;
7999 }
8000
8001 add_aux_fields = htab->params->non_overlapping_opd && cnt_16b > 0;
8002
8003 if (!broken && (need_edit || add_aux_fields))
8004 {
8005 Elf_Internal_Rela *write_rel;
8006 Elf_Internal_Shdr *rel_hdr;
8007 bfd_byte *rptr, *wptr;
8008 bfd_byte *new_contents;
8009 bfd_size_type amt;
8010
8011 new_contents = NULL;
8012 amt = OPD_NDX (sec->size) * sizeof (long);
8013 opd = &ppc64_elf_section_data (sec)->u.opd;
8014 opd->adjust = bfd_zalloc (sec->owner, amt);
8015 if (opd->adjust == NULL)
8016 return FALSE;
8017 ppc64_elf_section_data (sec)->sec_type = sec_opd;
8018
8019 /* This seems a waste of time as input .opd sections are all
8020 zeros as generated by gcc, but I suppose there's no reason
8021 this will always be so. We might start putting something in
8022 the third word of .opd entries. */
8023 if ((sec->flags & SEC_IN_MEMORY) == 0)
8024 {
8025 bfd_byte *loc;
8026 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
8027 {
8028 if (loc != NULL)
8029 free (loc);
8030 error_ret:
8031 if (local_syms != NULL
8032 && symtab_hdr->contents != (unsigned char *) local_syms)
8033 free (local_syms);
8034 if (elf_section_data (sec)->relocs != relstart)
8035 free (relstart);
8036 return FALSE;
8037 }
8038 sec->contents = loc;
8039 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
8040 }
8041
8042 elf_section_data (sec)->relocs = relstart;
8043
8044 new_contents = sec->contents;
8045 if (add_aux_fields)
8046 {
8047 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
8048 if (new_contents == NULL)
8049 return FALSE;
8050 need_pad = NULL;
8051 }
8052 wptr = new_contents;
8053 rptr = sec->contents;
8054 write_rel = relstart;
8055 for (rel = relstart; rel < relend; )
8056 {
8057 unsigned long r_symndx;
8058 asection *sym_sec;
8059 struct elf_link_hash_entry *h;
8060 struct ppc_link_hash_entry *fdh = NULL;
8061 Elf_Internal_Sym *sym;
8062 long opd_ent_size;
8063 Elf_Internal_Rela *next_rel;
8064 bfd_boolean skip;
8065
8066 r_symndx = ELF64_R_SYM (rel->r_info);
8067 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8068 r_symndx, ibfd))
8069 goto error_ret;
8070
8071 next_rel = rel + 2;
8072 if (next_rel + 1 == relend
8073 || (next_rel + 2 < relend
8074 && ELF64_R_TYPE (next_rel[2].r_info) == R_PPC64_TOC))
8075 ++next_rel;
8076
8077 /* See if the .opd entry is full 24 byte or
8078 16 byte (with fd_aux entry overlapped with next
8079 fd_func). */
8080 opd_ent_size = 24;
8081 if (next_rel == relend)
8082 {
8083 if (sec->size == rel->r_offset + 16)
8084 opd_ent_size = 16;
8085 }
8086 else if (next_rel->r_offset == rel->r_offset + 16)
8087 opd_ent_size = 16;
8088
8089 if (h != NULL
8090 && h->root.root.string[0] == '.')
8091 {
8092 fdh = lookup_fdh ((struct ppc_link_hash_entry *) h, htab);
8093 if (fdh != NULL
8094 && fdh->elf.root.type != bfd_link_hash_defined
8095 && fdh->elf.root.type != bfd_link_hash_defweak)
8096 fdh = NULL;
8097 }
8098
8099 skip = (sym_sec->owner != ibfd
8100 || sym_sec->output_section == bfd_abs_section_ptr);
8101 if (skip)
8102 {
8103 if (fdh != NULL && sym_sec->owner == ibfd)
8104 {
8105 /* Arrange for the function descriptor sym
8106 to be dropped. */
8107 fdh->elf.root.u.def.value = 0;
8108 fdh->elf.root.u.def.section = sym_sec;
8109 }
8110 opd->adjust[OPD_NDX (rel->r_offset)] = -1;
8111
8112 if (NO_OPD_RELOCS || bfd_link_relocatable (info))
8113 rel = next_rel;
8114 else
8115 while (1)
8116 {
8117 if (!dec_dynrel_count (rel->r_info, sec, info,
8118 NULL, h, sym))
8119 goto error_ret;
8120
8121 if (++rel == next_rel)
8122 break;
8123
8124 r_symndx = ELF64_R_SYM (rel->r_info);
8125 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8126 r_symndx, ibfd))
8127 goto error_ret;
8128 }
8129 }
8130 else
8131 {
8132 /* We'll be keeping this opd entry. */
8133 long adjust;
8134
8135 if (fdh != NULL)
8136 {
8137 /* Redefine the function descriptor symbol to
8138 this location in the opd section. It is
8139 necessary to update the value here rather
8140 than using an array of adjustments as we do
8141 for local symbols, because various places
8142 in the generic ELF code use the value
8143 stored in u.def.value. */
8144 fdh->elf.root.u.def.value = wptr - new_contents;
8145 fdh->adjust_done = 1;
8146 }
8147
8148 /* Local syms are a bit tricky. We could
8149 tweak them as they can be cached, but
8150 we'd need to look through the local syms
8151 for the function descriptor sym which we
8152 don't have at the moment. So keep an
8153 array of adjustments. */
8154 adjust = (wptr - new_contents) - (rptr - sec->contents);
8155 opd->adjust[OPD_NDX (rel->r_offset)] = adjust;
8156
8157 if (wptr != rptr)
8158 memcpy (wptr, rptr, opd_ent_size);
8159 wptr += opd_ent_size;
8160 if (add_aux_fields && opd_ent_size == 16)
8161 {
8162 memset (wptr, '\0', 8);
8163 wptr += 8;
8164 }
8165
8166 /* We need to adjust any reloc offsets to point to the
8167 new opd entries. */
8168 for ( ; rel != next_rel; ++rel)
8169 {
8170 rel->r_offset += adjust;
8171 if (write_rel != rel)
8172 memcpy (write_rel, rel, sizeof (*rel));
8173 ++write_rel;
8174 }
8175 }
8176
8177 rptr += opd_ent_size;
8178 }
8179
8180 sec->size = wptr - new_contents;
8181 sec->reloc_count = write_rel - relstart;
8182 if (add_aux_fields)
8183 {
8184 free (sec->contents);
8185 sec->contents = new_contents;
8186 }
8187
8188 /* Fudge the header size too, as this is used later in
8189 elf_bfd_final_link if we are emitting relocs. */
8190 rel_hdr = _bfd_elf_single_rel_hdr (sec);
8191 rel_hdr->sh_size = sec->reloc_count * rel_hdr->sh_entsize;
8192 some_edited = TRUE;
8193 }
8194 else if (elf_section_data (sec)->relocs != relstart)
8195 free (relstart);
8196
8197 if (local_syms != NULL
8198 && symtab_hdr->contents != (unsigned char *) local_syms)
8199 {
8200 if (!info->keep_memory)
8201 free (local_syms);
8202 else
8203 symtab_hdr->contents = (unsigned char *) local_syms;
8204 }
8205 }
8206
8207 if (some_edited)
8208 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
8209
8210 /* If we are doing a final link and the last .opd entry is just 16 byte
8211 long, add a 8 byte padding after it. */
8212 if (need_pad != NULL && !bfd_link_relocatable (info))
8213 {
8214 bfd_byte *p;
8215
8216 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
8217 {
8218 BFD_ASSERT (need_pad->size > 0);
8219
8220 p = bfd_malloc (need_pad->size + 8);
8221 if (p == NULL)
8222 return FALSE;
8223
8224 if (! bfd_get_section_contents (need_pad->owner, need_pad,
8225 p, 0, need_pad->size))
8226 return FALSE;
8227
8228 need_pad->contents = p;
8229 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
8230 }
8231 else
8232 {
8233 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
8234 if (p == NULL)
8235 return FALSE;
8236
8237 need_pad->contents = p;
8238 }
8239
8240 memset (need_pad->contents + need_pad->size, 0, 8);
8241 need_pad->size += 8;
8242 }
8243
8244 return TRUE;
8245 }
8246
8247 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
8248
8249 asection *
8250 ppc64_elf_tls_setup (struct bfd_link_info *info)
8251 {
8252 struct ppc_link_hash_table *htab;
8253
8254 htab = ppc_hash_table (info);
8255 if (htab == NULL)
8256 return NULL;
8257
8258 if (abiversion (info->output_bfd) == 1)
8259 htab->opd_abi = 1;
8260
8261 if (htab->params->no_multi_toc)
8262 htab->do_multi_toc = 0;
8263 else if (!htab->do_multi_toc)
8264 htab->params->no_multi_toc = 1;
8265
8266 htab->tls_get_addr = ((struct ppc_link_hash_entry *)
8267 elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
8268 FALSE, FALSE, TRUE));
8269 /* Move dynamic linking info to the function descriptor sym. */
8270 if (htab->tls_get_addr != NULL)
8271 func_desc_adjust (&htab->tls_get_addr->elf, info);
8272 htab->tls_get_addr_fd = ((struct ppc_link_hash_entry *)
8273 elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
8274 FALSE, FALSE, TRUE));
8275 if (htab->params->tls_get_addr_opt)
8276 {
8277 struct elf_link_hash_entry *opt, *opt_fd, *tga, *tga_fd;
8278
8279 opt = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr_opt",
8280 FALSE, FALSE, TRUE);
8281 if (opt != NULL)
8282 func_desc_adjust (opt, info);
8283 opt_fd = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
8284 FALSE, FALSE, TRUE);
8285 if (opt_fd != NULL
8286 && (opt_fd->root.type == bfd_link_hash_defined
8287 || opt_fd->root.type == bfd_link_hash_defweak))
8288 {
8289 /* If glibc supports an optimized __tls_get_addr call stub,
8290 signalled by the presence of __tls_get_addr_opt, and we'll
8291 be calling __tls_get_addr via a plt call stub, then
8292 make __tls_get_addr point to __tls_get_addr_opt. */
8293 tga_fd = &htab->tls_get_addr_fd->elf;
8294 if (htab->elf.dynamic_sections_created
8295 && tga_fd != NULL
8296 && (tga_fd->type == STT_FUNC
8297 || tga_fd->needs_plt)
8298 && !(SYMBOL_CALLS_LOCAL (info, tga_fd)
8299 || (ELF_ST_VISIBILITY (tga_fd->other) != STV_DEFAULT
8300 && tga_fd->root.type == bfd_link_hash_undefweak)))
8301 {
8302 struct plt_entry *ent;
8303
8304 for (ent = tga_fd->plt.plist; ent != NULL; ent = ent->next)
8305 if (ent->plt.refcount > 0)
8306 break;
8307 if (ent != NULL)
8308 {
8309 tga_fd->root.type = bfd_link_hash_indirect;
8310 tga_fd->root.u.i.link = &opt_fd->root;
8311 ppc64_elf_copy_indirect_symbol (info, opt_fd, tga_fd);
8312 opt_fd->forced_local = 0;
8313 if (opt_fd->dynindx != -1)
8314 {
8315 /* Use __tls_get_addr_opt in dynamic relocations. */
8316 opt_fd->dynindx = -1;
8317 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
8318 opt_fd->dynstr_index);
8319 if (!bfd_elf_link_record_dynamic_symbol (info, opt_fd))
8320 return NULL;
8321 }
8322 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) opt_fd;
8323 tga = &htab->tls_get_addr->elf;
8324 if (opt != NULL && tga != NULL)
8325 {
8326 tga->root.type = bfd_link_hash_indirect;
8327 tga->root.u.i.link = &opt->root;
8328 ppc64_elf_copy_indirect_symbol (info, opt, tga);
8329 opt->forced_local = 0;
8330 _bfd_elf_link_hash_hide_symbol (info, opt,
8331 tga->forced_local);
8332 htab->tls_get_addr = (struct ppc_link_hash_entry *) opt;
8333 }
8334 htab->tls_get_addr_fd->oh = htab->tls_get_addr;
8335 htab->tls_get_addr_fd->is_func_descriptor = 1;
8336 if (htab->tls_get_addr != NULL)
8337 {
8338 htab->tls_get_addr->oh = htab->tls_get_addr_fd;
8339 htab->tls_get_addr->is_func = 1;
8340 }
8341 }
8342 }
8343 }
8344 else if (htab->params->tls_get_addr_opt < 0)
8345 htab->params->tls_get_addr_opt = 0;
8346 }
8347 return _bfd_elf_tls_setup (info->output_bfd, info);
8348 }
8349
8350 /* Return TRUE iff REL is a branch reloc with a global symbol matching
8351 HASH1 or HASH2. */
8352
8353 static bfd_boolean
8354 branch_reloc_hash_match (const bfd *ibfd,
8355 const Elf_Internal_Rela *rel,
8356 const struct ppc_link_hash_entry *hash1,
8357 const struct ppc_link_hash_entry *hash2)
8358 {
8359 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
8360 enum elf_ppc64_reloc_type r_type = ELF64_R_TYPE (rel->r_info);
8361 unsigned int r_symndx = ELF64_R_SYM (rel->r_info);
8362
8363 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
8364 {
8365 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
8366 struct elf_link_hash_entry *h;
8367
8368 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
8369 h = elf_follow_link (h);
8370 if (h == &hash1->elf || h == &hash2->elf)
8371 return TRUE;
8372 }
8373 return FALSE;
8374 }
8375
8376 /* Run through all the TLS relocs looking for optimization
8377 opportunities. The linker has been hacked (see ppc64elf.em) to do
8378 a preliminary section layout so that we know the TLS segment
8379 offsets. We can't optimize earlier because some optimizations need
8380 to know the tp offset, and we need to optimize before allocating
8381 dynamic relocations. */
8382
8383 bfd_boolean
8384 ppc64_elf_tls_optimize (struct bfd_link_info *info)
8385 {
8386 bfd *ibfd;
8387 asection *sec;
8388 struct ppc_link_hash_table *htab;
8389 unsigned char *toc_ref;
8390 int pass;
8391
8392 if (!bfd_link_executable (info))
8393 return TRUE;
8394
8395 htab = ppc_hash_table (info);
8396 if (htab == NULL)
8397 return FALSE;
8398
8399 /* Make two passes over the relocs. On the first pass, mark toc
8400 entries involved with tls relocs, and check that tls relocs
8401 involved in setting up a tls_get_addr call are indeed followed by
8402 such a call. If they are not, we can't do any tls optimization.
8403 On the second pass twiddle tls_mask flags to notify
8404 relocate_section that optimization can be done, and adjust got
8405 and plt refcounts. */
8406 toc_ref = NULL;
8407 for (pass = 0; pass < 2; ++pass)
8408 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
8409 {
8410 Elf_Internal_Sym *locsyms = NULL;
8411 asection *toc = bfd_get_section_by_name (ibfd, ".toc");
8412
8413 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8414 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
8415 {
8416 Elf_Internal_Rela *relstart, *rel, *relend;
8417 bfd_boolean found_tls_get_addr_arg = 0;
8418
8419 /* Read the relocations. */
8420 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8421 info->keep_memory);
8422 if (relstart == NULL)
8423 {
8424 free (toc_ref);
8425 return FALSE;
8426 }
8427
8428 relend = relstart + sec->reloc_count;
8429 for (rel = relstart; rel < relend; rel++)
8430 {
8431 enum elf_ppc64_reloc_type r_type;
8432 unsigned long r_symndx;
8433 struct elf_link_hash_entry *h;
8434 Elf_Internal_Sym *sym;
8435 asection *sym_sec;
8436 unsigned char *tls_mask;
8437 unsigned char tls_set, tls_clear, tls_type = 0;
8438 bfd_vma value;
8439 bfd_boolean ok_tprel, is_local;
8440 long toc_ref_index = 0;
8441 int expecting_tls_get_addr = 0;
8442 bfd_boolean ret = FALSE;
8443
8444 r_symndx = ELF64_R_SYM (rel->r_info);
8445 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
8446 r_symndx, ibfd))
8447 {
8448 err_free_rel:
8449 if (elf_section_data (sec)->relocs != relstart)
8450 free (relstart);
8451 if (toc_ref != NULL)
8452 free (toc_ref);
8453 if (locsyms != NULL
8454 && (elf_symtab_hdr (ibfd).contents
8455 != (unsigned char *) locsyms))
8456 free (locsyms);
8457 return ret;
8458 }
8459
8460 if (h != NULL)
8461 {
8462 if (h->root.type == bfd_link_hash_defined
8463 || h->root.type == bfd_link_hash_defweak)
8464 value = h->root.u.def.value;
8465 else if (h->root.type == bfd_link_hash_undefweak)
8466 value = 0;
8467 else
8468 {
8469 found_tls_get_addr_arg = 0;
8470 continue;
8471 }
8472 }
8473 else
8474 /* Symbols referenced by TLS relocs must be of type
8475 STT_TLS. So no need for .opd local sym adjust. */
8476 value = sym->st_value;
8477
8478 ok_tprel = FALSE;
8479 is_local = FALSE;
8480 if (h == NULL
8481 || !h->def_dynamic)
8482 {
8483 is_local = TRUE;
8484 if (h != NULL
8485 && h->root.type == bfd_link_hash_undefweak)
8486 ok_tprel = TRUE;
8487 else if (sym_sec != NULL
8488 && sym_sec->output_section != NULL)
8489 {
8490 value += sym_sec->output_offset;
8491 value += sym_sec->output_section->vma;
8492 value -= htab->elf.tls_sec->vma;
8493 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
8494 < (bfd_vma) 1 << 32);
8495 }
8496 }
8497
8498 r_type = ELF64_R_TYPE (rel->r_info);
8499 /* If this section has old-style __tls_get_addr calls
8500 without marker relocs, then check that each
8501 __tls_get_addr call reloc is preceded by a reloc
8502 that conceivably belongs to the __tls_get_addr arg
8503 setup insn. If we don't find matching arg setup
8504 relocs, don't do any tls optimization. */
8505 if (pass == 0
8506 && sec->has_tls_get_addr_call
8507 && h != NULL
8508 && (h == &htab->tls_get_addr->elf
8509 || h == &htab->tls_get_addr_fd->elf)
8510 && !found_tls_get_addr_arg
8511 && is_branch_reloc (r_type))
8512 {
8513 info->callbacks->minfo (_("%H __tls_get_addr lost arg, "
8514 "TLS optimization disabled\n"),
8515 ibfd, sec, rel->r_offset);
8516 ret = TRUE;
8517 goto err_free_rel;
8518 }
8519
8520 found_tls_get_addr_arg = 0;
8521 switch (r_type)
8522 {
8523 case R_PPC64_GOT_TLSLD16:
8524 case R_PPC64_GOT_TLSLD16_LO:
8525 expecting_tls_get_addr = 1;
8526 found_tls_get_addr_arg = 1;
8527 /* Fall thru */
8528
8529 case R_PPC64_GOT_TLSLD16_HI:
8530 case R_PPC64_GOT_TLSLD16_HA:
8531 /* These relocs should never be against a symbol
8532 defined in a shared lib. Leave them alone if
8533 that turns out to be the case. */
8534 if (!is_local)
8535 continue;
8536
8537 /* LD -> LE */
8538 tls_set = 0;
8539 tls_clear = TLS_LD;
8540 tls_type = TLS_TLS | TLS_LD;
8541 break;
8542
8543 case R_PPC64_GOT_TLSGD16:
8544 case R_PPC64_GOT_TLSGD16_LO:
8545 expecting_tls_get_addr = 1;
8546 found_tls_get_addr_arg = 1;
8547 /* Fall thru */
8548
8549 case R_PPC64_GOT_TLSGD16_HI:
8550 case R_PPC64_GOT_TLSGD16_HA:
8551 if (ok_tprel)
8552 /* GD -> LE */
8553 tls_set = 0;
8554 else
8555 /* GD -> IE */
8556 tls_set = TLS_TLS | TLS_TPRELGD;
8557 tls_clear = TLS_GD;
8558 tls_type = TLS_TLS | TLS_GD;
8559 break;
8560
8561 case R_PPC64_GOT_TPREL16_DS:
8562 case R_PPC64_GOT_TPREL16_LO_DS:
8563 case R_PPC64_GOT_TPREL16_HI:
8564 case R_PPC64_GOT_TPREL16_HA:
8565 if (ok_tprel)
8566 {
8567 /* IE -> LE */
8568 tls_set = 0;
8569 tls_clear = TLS_TPREL;
8570 tls_type = TLS_TLS | TLS_TPREL;
8571 break;
8572 }
8573 continue;
8574
8575 case R_PPC64_TLSGD:
8576 case R_PPC64_TLSLD:
8577 found_tls_get_addr_arg = 1;
8578 /* Fall thru */
8579
8580 case R_PPC64_TLS:
8581 case R_PPC64_TOC16:
8582 case R_PPC64_TOC16_LO:
8583 if (sym_sec == NULL || sym_sec != toc)
8584 continue;
8585
8586 /* Mark this toc entry as referenced by a TLS
8587 code sequence. We can do that now in the
8588 case of R_PPC64_TLS, and after checking for
8589 tls_get_addr for the TOC16 relocs. */
8590 if (toc_ref == NULL)
8591 toc_ref = bfd_zmalloc (toc->output_section->rawsize / 8);
8592 if (toc_ref == NULL)
8593 goto err_free_rel;
8594
8595 if (h != NULL)
8596 value = h->root.u.def.value;
8597 else
8598 value = sym->st_value;
8599 value += rel->r_addend;
8600 if (value % 8 != 0)
8601 continue;
8602 BFD_ASSERT (value < toc->size
8603 && toc->output_offset % 8 == 0);
8604 toc_ref_index = (value + toc->output_offset) / 8;
8605 if (r_type == R_PPC64_TLS
8606 || r_type == R_PPC64_TLSGD
8607 || r_type == R_PPC64_TLSLD)
8608 {
8609 toc_ref[toc_ref_index] = 1;
8610 continue;
8611 }
8612
8613 if (pass != 0 && toc_ref[toc_ref_index] == 0)
8614 continue;
8615
8616 tls_set = 0;
8617 tls_clear = 0;
8618 expecting_tls_get_addr = 2;
8619 break;
8620
8621 case R_PPC64_TPREL64:
8622 if (pass == 0
8623 || sec != toc
8624 || toc_ref == NULL
8625 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
8626 continue;
8627 if (ok_tprel)
8628 {
8629 /* IE -> LE */
8630 tls_set = TLS_EXPLICIT;
8631 tls_clear = TLS_TPREL;
8632 break;
8633 }
8634 continue;
8635
8636 case R_PPC64_DTPMOD64:
8637 if (pass == 0
8638 || sec != toc
8639 || toc_ref == NULL
8640 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
8641 continue;
8642 if (rel + 1 < relend
8643 && (rel[1].r_info
8644 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
8645 && rel[1].r_offset == rel->r_offset + 8)
8646 {
8647 if (ok_tprel)
8648 /* GD -> LE */
8649 tls_set = TLS_EXPLICIT | TLS_GD;
8650 else
8651 /* GD -> IE */
8652 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
8653 tls_clear = TLS_GD;
8654 }
8655 else
8656 {
8657 if (!is_local)
8658 continue;
8659
8660 /* LD -> LE */
8661 tls_set = TLS_EXPLICIT;
8662 tls_clear = TLS_LD;
8663 }
8664 break;
8665
8666 default:
8667 continue;
8668 }
8669
8670 if (pass == 0)
8671 {
8672 if (!expecting_tls_get_addr
8673 || !sec->has_tls_get_addr_call)
8674 continue;
8675
8676 if (rel + 1 < relend
8677 && branch_reloc_hash_match (ibfd, rel + 1,
8678 htab->tls_get_addr,
8679 htab->tls_get_addr_fd))
8680 {
8681 if (expecting_tls_get_addr == 2)
8682 {
8683 /* Check for toc tls entries. */
8684 unsigned char *toc_tls;
8685 int retval;
8686
8687 retval = get_tls_mask (&toc_tls, NULL, NULL,
8688 &locsyms,
8689 rel, ibfd);
8690 if (retval == 0)
8691 goto err_free_rel;
8692 if (toc_tls != NULL)
8693 {
8694 if ((*toc_tls & (TLS_GD | TLS_LD)) != 0)
8695 found_tls_get_addr_arg = 1;
8696 if (retval > 1)
8697 toc_ref[toc_ref_index] = 1;
8698 }
8699 }
8700 continue;
8701 }
8702
8703 if (expecting_tls_get_addr != 1)
8704 continue;
8705
8706 /* Uh oh, we didn't find the expected call. We
8707 could just mark this symbol to exclude it
8708 from tls optimization but it's safer to skip
8709 the entire optimization. */
8710 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
8711 "TLS optimization disabled\n"),
8712 ibfd, sec, rel->r_offset);
8713 ret = TRUE;
8714 goto err_free_rel;
8715 }
8716
8717 if (expecting_tls_get_addr && htab->tls_get_addr != NULL)
8718 {
8719 struct plt_entry *ent;
8720 for (ent = htab->tls_get_addr->elf.plt.plist;
8721 ent != NULL;
8722 ent = ent->next)
8723 if (ent->addend == 0)
8724 {
8725 if (ent->plt.refcount > 0)
8726 {
8727 ent->plt.refcount -= 1;
8728 expecting_tls_get_addr = 0;
8729 }
8730 break;
8731 }
8732 }
8733
8734 if (expecting_tls_get_addr && htab->tls_get_addr_fd != NULL)
8735 {
8736 struct plt_entry *ent;
8737 for (ent = htab->tls_get_addr_fd->elf.plt.plist;
8738 ent != NULL;
8739 ent = ent->next)
8740 if (ent->addend == 0)
8741 {
8742 if (ent->plt.refcount > 0)
8743 ent->plt.refcount -= 1;
8744 break;
8745 }
8746 }
8747
8748 if (tls_clear == 0)
8749 continue;
8750
8751 if ((tls_set & TLS_EXPLICIT) == 0)
8752 {
8753 struct got_entry *ent;
8754
8755 /* Adjust got entry for this reloc. */
8756 if (h != NULL)
8757 ent = h->got.glist;
8758 else
8759 ent = elf_local_got_ents (ibfd)[r_symndx];
8760
8761 for (; ent != NULL; ent = ent->next)
8762 if (ent->addend == rel->r_addend
8763 && ent->owner == ibfd
8764 && ent->tls_type == tls_type)
8765 break;
8766 if (ent == NULL)
8767 abort ();
8768
8769 if (tls_set == 0)
8770 {
8771 /* We managed to get rid of a got entry. */
8772 if (ent->got.refcount > 0)
8773 ent->got.refcount -= 1;
8774 }
8775 }
8776 else
8777 {
8778 /* If we got rid of a DTPMOD/DTPREL reloc pair then
8779 we'll lose one or two dyn relocs. */
8780 if (!dec_dynrel_count (rel->r_info, sec, info,
8781 NULL, h, sym))
8782 return FALSE;
8783
8784 if (tls_set == (TLS_EXPLICIT | TLS_GD))
8785 {
8786 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
8787 NULL, h, sym))
8788 return FALSE;
8789 }
8790 }
8791
8792 *tls_mask |= tls_set;
8793 *tls_mask &= ~tls_clear;
8794 }
8795
8796 if (elf_section_data (sec)->relocs != relstart)
8797 free (relstart);
8798 }
8799
8800 if (locsyms != NULL
8801 && (elf_symtab_hdr (ibfd).contents != (unsigned char *) locsyms))
8802 {
8803 if (!info->keep_memory)
8804 free (locsyms);
8805 else
8806 elf_symtab_hdr (ibfd).contents = (unsigned char *) locsyms;
8807 }
8808 }
8809
8810 if (toc_ref != NULL)
8811 free (toc_ref);
8812 return TRUE;
8813 }
8814
8815 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
8816 the values of any global symbols in a toc section that has been
8817 edited. Globals in toc sections should be a rarity, so this function
8818 sets a flag if any are found in toc sections other than the one just
8819 edited, so that futher hash table traversals can be avoided. */
8820
8821 struct adjust_toc_info
8822 {
8823 asection *toc;
8824 unsigned long *skip;
8825 bfd_boolean global_toc_syms;
8826 };
8827
8828 enum toc_skip_enum { ref_from_discarded = 1, can_optimize = 2 };
8829
8830 static bfd_boolean
8831 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
8832 {
8833 struct ppc_link_hash_entry *eh;
8834 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
8835 unsigned long i;
8836
8837 if (h->root.type != bfd_link_hash_defined
8838 && h->root.type != bfd_link_hash_defweak)
8839 return TRUE;
8840
8841 eh = (struct ppc_link_hash_entry *) h;
8842 if (eh->adjust_done)
8843 return TRUE;
8844
8845 if (eh->elf.root.u.def.section == toc_inf->toc)
8846 {
8847 if (eh->elf.root.u.def.value > toc_inf->toc->rawsize)
8848 i = toc_inf->toc->rawsize >> 3;
8849 else
8850 i = eh->elf.root.u.def.value >> 3;
8851
8852 if ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0)
8853 {
8854 _bfd_error_handler
8855 (_("%s defined on removed toc entry"), eh->elf.root.root.string);
8856 do
8857 ++i;
8858 while ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0);
8859 eh->elf.root.u.def.value = (bfd_vma) i << 3;
8860 }
8861
8862 eh->elf.root.u.def.value -= toc_inf->skip[i];
8863 eh->adjust_done = 1;
8864 }
8865 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
8866 toc_inf->global_toc_syms = TRUE;
8867
8868 return TRUE;
8869 }
8870
8871 /* Return TRUE iff INSN is one we expect on a _LO variety toc/got reloc. */
8872
8873 static bfd_boolean
8874 ok_lo_toc_insn (unsigned int insn)
8875 {
8876 return ((insn & (0x3f << 26)) == 14u << 26 /* addi */
8877 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
8878 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
8879 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
8880 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
8881 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
8882 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
8883 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
8884 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
8885 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
8886 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
8887 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
8888 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
8889 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
8890 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
8891 && (insn & 3) != 1)
8892 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
8893 && ((insn & 3) == 0 || (insn & 3) == 3))
8894 || (insn & (0x3f << 26)) == 12u << 26 /* addic */);
8895 }
8896
8897 /* Examine all relocs referencing .toc sections in order to remove
8898 unused .toc entries. */
8899
8900 bfd_boolean
8901 ppc64_elf_edit_toc (struct bfd_link_info *info)
8902 {
8903 bfd *ibfd;
8904 struct adjust_toc_info toc_inf;
8905 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8906
8907 htab->do_toc_opt = 1;
8908 toc_inf.global_toc_syms = TRUE;
8909 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
8910 {
8911 asection *toc, *sec;
8912 Elf_Internal_Shdr *symtab_hdr;
8913 Elf_Internal_Sym *local_syms;
8914 Elf_Internal_Rela *relstart, *rel, *toc_relocs;
8915 unsigned long *skip, *drop;
8916 unsigned char *used;
8917 unsigned char *keep, last, some_unused;
8918
8919 if (!is_ppc64_elf (ibfd))
8920 continue;
8921
8922 toc = bfd_get_section_by_name (ibfd, ".toc");
8923 if (toc == NULL
8924 || toc->size == 0
8925 || toc->sec_info_type == SEC_INFO_TYPE_JUST_SYMS
8926 || discarded_section (toc))
8927 continue;
8928
8929 toc_relocs = NULL;
8930 local_syms = NULL;
8931 symtab_hdr = &elf_symtab_hdr (ibfd);
8932
8933 /* Look at sections dropped from the final link. */
8934 skip = NULL;
8935 relstart = NULL;
8936 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8937 {
8938 if (sec->reloc_count == 0
8939 || !discarded_section (sec)
8940 || get_opd_info (sec)
8941 || (sec->flags & SEC_ALLOC) == 0
8942 || (sec->flags & SEC_DEBUGGING) != 0)
8943 continue;
8944
8945 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
8946 if (relstart == NULL)
8947 goto error_ret;
8948
8949 /* Run through the relocs to see which toc entries might be
8950 unused. */
8951 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8952 {
8953 enum elf_ppc64_reloc_type r_type;
8954 unsigned long r_symndx;
8955 asection *sym_sec;
8956 struct elf_link_hash_entry *h;
8957 Elf_Internal_Sym *sym;
8958 bfd_vma val;
8959
8960 r_type = ELF64_R_TYPE (rel->r_info);
8961 switch (r_type)
8962 {
8963 default:
8964 continue;
8965
8966 case R_PPC64_TOC16:
8967 case R_PPC64_TOC16_LO:
8968 case R_PPC64_TOC16_HI:
8969 case R_PPC64_TOC16_HA:
8970 case R_PPC64_TOC16_DS:
8971 case R_PPC64_TOC16_LO_DS:
8972 break;
8973 }
8974
8975 r_symndx = ELF64_R_SYM (rel->r_info);
8976 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8977 r_symndx, ibfd))
8978 goto error_ret;
8979
8980 if (sym_sec != toc)
8981 continue;
8982
8983 if (h != NULL)
8984 val = h->root.u.def.value;
8985 else
8986 val = sym->st_value;
8987 val += rel->r_addend;
8988
8989 if (val >= toc->size)
8990 continue;
8991
8992 /* Anything in the toc ought to be aligned to 8 bytes.
8993 If not, don't mark as unused. */
8994 if (val & 7)
8995 continue;
8996
8997 if (skip == NULL)
8998 {
8999 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
9000 if (skip == NULL)
9001 goto error_ret;
9002 }
9003
9004 skip[val >> 3] = ref_from_discarded;
9005 }
9006
9007 if (elf_section_data (sec)->relocs != relstart)
9008 free (relstart);
9009 }
9010
9011 /* For largetoc loads of address constants, we can convert
9012 . addis rx,2,addr@got@ha
9013 . ld ry,addr@got@l(rx)
9014 to
9015 . addis rx,2,addr@toc@ha
9016 . addi ry,rx,addr@toc@l
9017 when addr is within 2G of the toc pointer. This then means
9018 that the word storing "addr" in the toc is no longer needed. */
9019
9020 if (!ppc64_elf_tdata (ibfd)->has_small_toc_reloc
9021 && toc->output_section->rawsize < (bfd_vma) 1 << 31
9022 && toc->reloc_count != 0)
9023 {
9024 /* Read toc relocs. */
9025 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
9026 info->keep_memory);
9027 if (toc_relocs == NULL)
9028 goto error_ret;
9029
9030 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
9031 {
9032 enum elf_ppc64_reloc_type r_type;
9033 unsigned long r_symndx;
9034 asection *sym_sec;
9035 struct elf_link_hash_entry *h;
9036 Elf_Internal_Sym *sym;
9037 bfd_vma val, addr;
9038
9039 r_type = ELF64_R_TYPE (rel->r_info);
9040 if (r_type != R_PPC64_ADDR64)
9041 continue;
9042
9043 r_symndx = ELF64_R_SYM (rel->r_info);
9044 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9045 r_symndx, ibfd))
9046 goto error_ret;
9047
9048 if (sym_sec == NULL
9049 || sym_sec->output_section == NULL
9050 || discarded_section (sym_sec))
9051 continue;
9052
9053 if (!SYMBOL_REFERENCES_LOCAL (info, h))
9054 continue;
9055
9056 if (h != NULL)
9057 {
9058 if (h->type == STT_GNU_IFUNC)
9059 continue;
9060 val = h->root.u.def.value;
9061 }
9062 else
9063 {
9064 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
9065 continue;
9066 val = sym->st_value;
9067 }
9068 val += rel->r_addend;
9069 val += sym_sec->output_section->vma + sym_sec->output_offset;
9070
9071 /* We don't yet know the exact toc pointer value, but we
9072 know it will be somewhere in the toc section. Don't
9073 optimize if the difference from any possible toc
9074 pointer is outside [ff..f80008000, 7fff7fff]. */
9075 addr = toc->output_section->vma + TOC_BASE_OFF;
9076 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
9077 continue;
9078
9079 addr = toc->output_section->vma + toc->output_section->rawsize;
9080 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
9081 continue;
9082
9083 if (skip == NULL)
9084 {
9085 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
9086 if (skip == NULL)
9087 goto error_ret;
9088 }
9089
9090 skip[rel->r_offset >> 3]
9091 |= can_optimize | ((rel - toc_relocs) << 2);
9092 }
9093 }
9094
9095 if (skip == NULL)
9096 continue;
9097
9098 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
9099 if (used == NULL)
9100 {
9101 error_ret:
9102 if (local_syms != NULL
9103 && symtab_hdr->contents != (unsigned char *) local_syms)
9104 free (local_syms);
9105 if (sec != NULL
9106 && relstart != NULL
9107 && elf_section_data (sec)->relocs != relstart)
9108 free (relstart);
9109 if (toc_relocs != NULL
9110 && elf_section_data (toc)->relocs != toc_relocs)
9111 free (toc_relocs);
9112 if (skip != NULL)
9113 free (skip);
9114 return FALSE;
9115 }
9116
9117 /* Now check all kept sections that might reference the toc.
9118 Check the toc itself last. */
9119 for (sec = (ibfd->sections == toc && toc->next ? toc->next
9120 : ibfd->sections);
9121 sec != NULL;
9122 sec = (sec == toc ? NULL
9123 : sec->next == NULL ? toc
9124 : sec->next == toc && toc->next ? toc->next
9125 : sec->next))
9126 {
9127 int repeat;
9128
9129 if (sec->reloc_count == 0
9130 || discarded_section (sec)
9131 || get_opd_info (sec)
9132 || (sec->flags & SEC_ALLOC) == 0
9133 || (sec->flags & SEC_DEBUGGING) != 0)
9134 continue;
9135
9136 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
9137 info->keep_memory);
9138 if (relstart == NULL)
9139 {
9140 free (used);
9141 goto error_ret;
9142 }
9143
9144 /* Mark toc entries referenced as used. */
9145 do
9146 {
9147 repeat = 0;
9148 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
9149 {
9150 enum elf_ppc64_reloc_type r_type;
9151 unsigned long r_symndx;
9152 asection *sym_sec;
9153 struct elf_link_hash_entry *h;
9154 Elf_Internal_Sym *sym;
9155 bfd_vma val;
9156 enum {no_check, check_lo, check_ha} insn_check;
9157
9158 r_type = ELF64_R_TYPE (rel->r_info);
9159 switch (r_type)
9160 {
9161 default:
9162 insn_check = no_check;
9163 break;
9164
9165 case R_PPC64_GOT_TLSLD16_HA:
9166 case R_PPC64_GOT_TLSGD16_HA:
9167 case R_PPC64_GOT_TPREL16_HA:
9168 case R_PPC64_GOT_DTPREL16_HA:
9169 case R_PPC64_GOT16_HA:
9170 case R_PPC64_TOC16_HA:
9171 insn_check = check_ha;
9172 break;
9173
9174 case R_PPC64_GOT_TLSLD16_LO:
9175 case R_PPC64_GOT_TLSGD16_LO:
9176 case R_PPC64_GOT_TPREL16_LO_DS:
9177 case R_PPC64_GOT_DTPREL16_LO_DS:
9178 case R_PPC64_GOT16_LO:
9179 case R_PPC64_GOT16_LO_DS:
9180 case R_PPC64_TOC16_LO:
9181 case R_PPC64_TOC16_LO_DS:
9182 insn_check = check_lo;
9183 break;
9184 }
9185
9186 if (insn_check != no_check)
9187 {
9188 bfd_vma off = rel->r_offset & ~3;
9189 unsigned char buf[4];
9190 unsigned int insn;
9191
9192 if (!bfd_get_section_contents (ibfd, sec, buf, off, 4))
9193 {
9194 free (used);
9195 goto error_ret;
9196 }
9197 insn = bfd_get_32 (ibfd, buf);
9198 if (insn_check == check_lo
9199 ? !ok_lo_toc_insn (insn)
9200 : ((insn & ((0x3f << 26) | 0x1f << 16))
9201 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */))
9202 {
9203 char str[12];
9204
9205 ppc64_elf_tdata (ibfd)->unexpected_toc_insn = 1;
9206 sprintf (str, "%#08x", insn);
9207 info->callbacks->einfo
9208 (_("%P: %H: toc optimization is not supported for"
9209 " %s instruction.\n"),
9210 ibfd, sec, rel->r_offset & ~3, str);
9211 }
9212 }
9213
9214 switch (r_type)
9215 {
9216 case R_PPC64_TOC16:
9217 case R_PPC64_TOC16_LO:
9218 case R_PPC64_TOC16_HI:
9219 case R_PPC64_TOC16_HA:
9220 case R_PPC64_TOC16_DS:
9221 case R_PPC64_TOC16_LO_DS:
9222 /* In case we're taking addresses of toc entries. */
9223 case R_PPC64_ADDR64:
9224 break;
9225
9226 default:
9227 continue;
9228 }
9229
9230 r_symndx = ELF64_R_SYM (rel->r_info);
9231 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9232 r_symndx, ibfd))
9233 {
9234 free (used);
9235 goto error_ret;
9236 }
9237
9238 if (sym_sec != toc)
9239 continue;
9240
9241 if (h != NULL)
9242 val = h->root.u.def.value;
9243 else
9244 val = sym->st_value;
9245 val += rel->r_addend;
9246
9247 if (val >= toc->size)
9248 continue;
9249
9250 if ((skip[val >> 3] & can_optimize) != 0)
9251 {
9252 bfd_vma off;
9253 unsigned char opc;
9254
9255 switch (r_type)
9256 {
9257 case R_PPC64_TOC16_HA:
9258 break;
9259
9260 case R_PPC64_TOC16_LO_DS:
9261 off = rel->r_offset;
9262 off += (bfd_big_endian (ibfd) ? -2 : 3);
9263 if (!bfd_get_section_contents (ibfd, sec, &opc,
9264 off, 1))
9265 {
9266 free (used);
9267 goto error_ret;
9268 }
9269 if ((opc & (0x3f << 2)) == (58u << 2))
9270 break;
9271 /* Fall thru */
9272
9273 default:
9274 /* Wrong sort of reloc, or not a ld. We may
9275 as well clear ref_from_discarded too. */
9276 skip[val >> 3] = 0;
9277 }
9278 }
9279
9280 if (sec != toc)
9281 used[val >> 3] = 1;
9282 /* For the toc section, we only mark as used if this
9283 entry itself isn't unused. */
9284 else if ((used[rel->r_offset >> 3]
9285 || !(skip[rel->r_offset >> 3] & ref_from_discarded))
9286 && !used[val >> 3])
9287 {
9288 /* Do all the relocs again, to catch reference
9289 chains. */
9290 repeat = 1;
9291 used[val >> 3] = 1;
9292 }
9293 }
9294 }
9295 while (repeat);
9296
9297 if (elf_section_data (sec)->relocs != relstart)
9298 free (relstart);
9299 }
9300
9301 /* Merge the used and skip arrays. Assume that TOC
9302 doublewords not appearing as either used or unused belong
9303 to to an entry more than one doubleword in size. */
9304 for (drop = skip, keep = used, last = 0, some_unused = 0;
9305 drop < skip + (toc->size + 7) / 8;
9306 ++drop, ++keep)
9307 {
9308 if (*keep)
9309 {
9310 *drop &= ~ref_from_discarded;
9311 if ((*drop & can_optimize) != 0)
9312 some_unused = 1;
9313 last = 0;
9314 }
9315 else if ((*drop & ref_from_discarded) != 0)
9316 {
9317 some_unused = 1;
9318 last = ref_from_discarded;
9319 }
9320 else
9321 *drop = last;
9322 }
9323
9324 free (used);
9325
9326 if (some_unused)
9327 {
9328 bfd_byte *contents, *src;
9329 unsigned long off;
9330 Elf_Internal_Sym *sym;
9331 bfd_boolean local_toc_syms = FALSE;
9332
9333 /* Shuffle the toc contents, and at the same time convert the
9334 skip array from booleans into offsets. */
9335 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
9336 goto error_ret;
9337
9338 elf_section_data (toc)->this_hdr.contents = contents;
9339
9340 for (src = contents, off = 0, drop = skip;
9341 src < contents + toc->size;
9342 src += 8, ++drop)
9343 {
9344 if ((*drop & (can_optimize | ref_from_discarded)) != 0)
9345 off += 8;
9346 else if (off != 0)
9347 {
9348 *drop = off;
9349 memcpy (src - off, src, 8);
9350 }
9351 }
9352 *drop = off;
9353 toc->rawsize = toc->size;
9354 toc->size = src - contents - off;
9355
9356 /* Adjust addends for relocs against the toc section sym,
9357 and optimize any accesses we can. */
9358 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
9359 {
9360 if (sec->reloc_count == 0
9361 || discarded_section (sec))
9362 continue;
9363
9364 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
9365 info->keep_memory);
9366 if (relstart == NULL)
9367 goto error_ret;
9368
9369 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
9370 {
9371 enum elf_ppc64_reloc_type r_type;
9372 unsigned long r_symndx;
9373 asection *sym_sec;
9374 struct elf_link_hash_entry *h;
9375 bfd_vma val;
9376
9377 r_type = ELF64_R_TYPE (rel->r_info);
9378 switch (r_type)
9379 {
9380 default:
9381 continue;
9382
9383 case R_PPC64_TOC16:
9384 case R_PPC64_TOC16_LO:
9385 case R_PPC64_TOC16_HI:
9386 case R_PPC64_TOC16_HA:
9387 case R_PPC64_TOC16_DS:
9388 case R_PPC64_TOC16_LO_DS:
9389 case R_PPC64_ADDR64:
9390 break;
9391 }
9392
9393 r_symndx = ELF64_R_SYM (rel->r_info);
9394 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9395 r_symndx, ibfd))
9396 goto error_ret;
9397
9398 if (sym_sec != toc)
9399 continue;
9400
9401 if (h != NULL)
9402 val = h->root.u.def.value;
9403 else
9404 {
9405 val = sym->st_value;
9406 if (val != 0)
9407 local_toc_syms = TRUE;
9408 }
9409
9410 val += rel->r_addend;
9411
9412 if (val > toc->rawsize)
9413 val = toc->rawsize;
9414 else if ((skip[val >> 3] & ref_from_discarded) != 0)
9415 continue;
9416 else if ((skip[val >> 3] & can_optimize) != 0)
9417 {
9418 Elf_Internal_Rela *tocrel
9419 = toc_relocs + (skip[val >> 3] >> 2);
9420 unsigned long tsym = ELF64_R_SYM (tocrel->r_info);
9421
9422 switch (r_type)
9423 {
9424 case R_PPC64_TOC16_HA:
9425 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_TOC16_HA);
9426 break;
9427
9428 case R_PPC64_TOC16_LO_DS:
9429 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_LO_DS_OPT);
9430 break;
9431
9432 default:
9433 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
9434 ppc_howto_init ();
9435 info->callbacks->einfo
9436 (_("%P: %H: %s references "
9437 "optimized away TOC entry\n"),
9438 ibfd, sec, rel->r_offset,
9439 ppc64_elf_howto_table[r_type]->name);
9440 bfd_set_error (bfd_error_bad_value);
9441 goto error_ret;
9442 }
9443 rel->r_addend = tocrel->r_addend;
9444 elf_section_data (sec)->relocs = relstart;
9445 continue;
9446 }
9447
9448 if (h != NULL || sym->st_value != 0)
9449 continue;
9450
9451 rel->r_addend -= skip[val >> 3];
9452 elf_section_data (sec)->relocs = relstart;
9453 }
9454
9455 if (elf_section_data (sec)->relocs != relstart)
9456 free (relstart);
9457 }
9458
9459 /* We shouldn't have local or global symbols defined in the TOC,
9460 but handle them anyway. */
9461 if (local_syms != NULL)
9462 for (sym = local_syms;
9463 sym < local_syms + symtab_hdr->sh_info;
9464 ++sym)
9465 if (sym->st_value != 0
9466 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
9467 {
9468 unsigned long i;
9469
9470 if (sym->st_value > toc->rawsize)
9471 i = toc->rawsize >> 3;
9472 else
9473 i = sym->st_value >> 3;
9474
9475 if ((skip[i] & (ref_from_discarded | can_optimize)) != 0)
9476 {
9477 if (local_toc_syms)
9478 _bfd_error_handler
9479 (_("%s defined on removed toc entry"),
9480 bfd_elf_sym_name (ibfd, symtab_hdr, sym, NULL));
9481 do
9482 ++i;
9483 while ((skip[i] & (ref_from_discarded | can_optimize)));
9484 sym->st_value = (bfd_vma) i << 3;
9485 }
9486
9487 sym->st_value -= skip[i];
9488 symtab_hdr->contents = (unsigned char *) local_syms;
9489 }
9490
9491 /* Adjust any global syms defined in this toc input section. */
9492 if (toc_inf.global_toc_syms)
9493 {
9494 toc_inf.toc = toc;
9495 toc_inf.skip = skip;
9496 toc_inf.global_toc_syms = FALSE;
9497 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
9498 &toc_inf);
9499 }
9500
9501 if (toc->reloc_count != 0)
9502 {
9503 Elf_Internal_Shdr *rel_hdr;
9504 Elf_Internal_Rela *wrel;
9505 bfd_size_type sz;
9506
9507 /* Remove unused toc relocs, and adjust those we keep. */
9508 if (toc_relocs == NULL)
9509 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
9510 info->keep_memory);
9511 if (toc_relocs == NULL)
9512 goto error_ret;
9513
9514 wrel = toc_relocs;
9515 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
9516 if ((skip[rel->r_offset >> 3]
9517 & (ref_from_discarded | can_optimize)) == 0)
9518 {
9519 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
9520 wrel->r_info = rel->r_info;
9521 wrel->r_addend = rel->r_addend;
9522 ++wrel;
9523 }
9524 else if (!dec_dynrel_count (rel->r_info, toc, info,
9525 &local_syms, NULL, NULL))
9526 goto error_ret;
9527
9528 elf_section_data (toc)->relocs = toc_relocs;
9529 toc->reloc_count = wrel - toc_relocs;
9530 rel_hdr = _bfd_elf_single_rel_hdr (toc);
9531 sz = rel_hdr->sh_entsize;
9532 rel_hdr->sh_size = toc->reloc_count * sz;
9533 }
9534 }
9535 else if (toc_relocs != NULL
9536 && elf_section_data (toc)->relocs != toc_relocs)
9537 free (toc_relocs);
9538
9539 if (local_syms != NULL
9540 && symtab_hdr->contents != (unsigned char *) local_syms)
9541 {
9542 if (!info->keep_memory)
9543 free (local_syms);
9544 else
9545 symtab_hdr->contents = (unsigned char *) local_syms;
9546 }
9547 free (skip);
9548 }
9549
9550 return TRUE;
9551 }
9552
9553 /* Return true iff input section I references the TOC using
9554 instructions limited to +/-32k offsets. */
9555
9556 bfd_boolean
9557 ppc64_elf_has_small_toc_reloc (asection *i)
9558 {
9559 return (is_ppc64_elf (i->owner)
9560 && ppc64_elf_tdata (i->owner)->has_small_toc_reloc);
9561 }
9562
9563 /* Allocate space for one GOT entry. */
9564
9565 static void
9566 allocate_got (struct elf_link_hash_entry *h,
9567 struct bfd_link_info *info,
9568 struct got_entry *gent)
9569 {
9570 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9571 bfd_boolean dyn;
9572 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
9573 int entsize = (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)
9574 ? 16 : 8);
9575 int rentsize = (gent->tls_type & eh->tls_mask & TLS_GD
9576 ? 2 : 1) * sizeof (Elf64_External_Rela);
9577 asection *got = ppc64_elf_tdata (gent->owner)->got;
9578
9579 gent->got.offset = got->size;
9580 got->size += entsize;
9581
9582 dyn = htab->elf.dynamic_sections_created;
9583 if (h->type == STT_GNU_IFUNC)
9584 {
9585 htab->elf.irelplt->size += rentsize;
9586 htab->got_reli_size += rentsize;
9587 }
9588 else if ((bfd_link_pic (info)
9589 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
9590 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
9591 || h->root.type != bfd_link_hash_undefweak))
9592 {
9593 asection *relgot = ppc64_elf_tdata (gent->owner)->relgot;
9594 relgot->size += rentsize;
9595 }
9596 }
9597
9598 /* This function merges got entries in the same toc group. */
9599
9600 static void
9601 merge_got_entries (struct got_entry **pent)
9602 {
9603 struct got_entry *ent, *ent2;
9604
9605 for (ent = *pent; ent != NULL; ent = ent->next)
9606 if (!ent->is_indirect)
9607 for (ent2 = ent->next; ent2 != NULL; ent2 = ent2->next)
9608 if (!ent2->is_indirect
9609 && ent2->addend == ent->addend
9610 && ent2->tls_type == ent->tls_type
9611 && elf_gp (ent2->owner) == elf_gp (ent->owner))
9612 {
9613 ent2->is_indirect = TRUE;
9614 ent2->got.ent = ent;
9615 }
9616 }
9617
9618 /* Allocate space in .plt, .got and associated reloc sections for
9619 dynamic relocs. */
9620
9621 static bfd_boolean
9622 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
9623 {
9624 struct bfd_link_info *info;
9625 struct ppc_link_hash_table *htab;
9626 asection *s;
9627 struct ppc_link_hash_entry *eh;
9628 struct got_entry **pgent, *gent;
9629
9630 if (h->root.type == bfd_link_hash_indirect)
9631 return TRUE;
9632
9633 info = (struct bfd_link_info *) inf;
9634 htab = ppc_hash_table (info);
9635 if (htab == NULL)
9636 return FALSE;
9637
9638 eh = (struct ppc_link_hash_entry *) h;
9639 /* Run through the TLS GD got entries first if we're changing them
9640 to TPREL. */
9641 if ((eh->tls_mask & TLS_TPRELGD) != 0)
9642 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9643 if (gent->got.refcount > 0
9644 && (gent->tls_type & TLS_GD) != 0)
9645 {
9646 /* This was a GD entry that has been converted to TPREL. If
9647 there happens to be a TPREL entry we can use that one. */
9648 struct got_entry *ent;
9649 for (ent = h->got.glist; ent != NULL; ent = ent->next)
9650 if (ent->got.refcount > 0
9651 && (ent->tls_type & TLS_TPREL) != 0
9652 && ent->addend == gent->addend
9653 && ent->owner == gent->owner)
9654 {
9655 gent->got.refcount = 0;
9656 break;
9657 }
9658
9659 /* If not, then we'll be using our own TPREL entry. */
9660 if (gent->got.refcount != 0)
9661 gent->tls_type = TLS_TLS | TLS_TPREL;
9662 }
9663
9664 /* Remove any list entry that won't generate a word in the GOT before
9665 we call merge_got_entries. Otherwise we risk merging to empty
9666 entries. */
9667 pgent = &h->got.glist;
9668 while ((gent = *pgent) != NULL)
9669 if (gent->got.refcount > 0)
9670 {
9671 if ((gent->tls_type & TLS_LD) != 0
9672 && !h->def_dynamic)
9673 {
9674 ppc64_tlsld_got (gent->owner)->got.refcount += 1;
9675 *pgent = gent->next;
9676 }
9677 else
9678 pgent = &gent->next;
9679 }
9680 else
9681 *pgent = gent->next;
9682
9683 if (!htab->do_multi_toc)
9684 merge_got_entries (&h->got.glist);
9685
9686 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9687 if (!gent->is_indirect)
9688 {
9689 /* Make sure this symbol is output as a dynamic symbol.
9690 Undefined weak syms won't yet be marked as dynamic,
9691 nor will all TLS symbols. */
9692 if (h->dynindx == -1
9693 && !h->forced_local
9694 && h->type != STT_GNU_IFUNC
9695 && htab->elf.dynamic_sections_created)
9696 {
9697 if (! bfd_elf_link_record_dynamic_symbol (info, h))
9698 return FALSE;
9699 }
9700
9701 if (!is_ppc64_elf (gent->owner))
9702 abort ();
9703
9704 allocate_got (h, info, gent);
9705 }
9706
9707 if (!htab->elf.dynamic_sections_created
9708 && h->type != STT_GNU_IFUNC)
9709 eh->dyn_relocs = NULL;
9710
9711 if (eh->dyn_relocs != NULL)
9712 {
9713 struct elf_dyn_relocs *p, **pp;
9714
9715 /* In the shared -Bsymbolic case, discard space allocated for
9716 dynamic pc-relative relocs against symbols which turn out to
9717 be defined in regular objects. For the normal shared case,
9718 discard space for relocs that have become local due to symbol
9719 visibility changes. */
9720
9721 if (bfd_link_pic (info))
9722 {
9723 /* Relocs that use pc_count are those that appear on a call
9724 insn, or certain REL relocs (see must_be_dyn_reloc) that
9725 can be generated via assembly. We want calls to
9726 protected symbols to resolve directly to the function
9727 rather than going via the plt. If people want function
9728 pointer comparisons to work as expected then they should
9729 avoid writing weird assembly. */
9730 if (SYMBOL_CALLS_LOCAL (info, h))
9731 {
9732 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
9733 {
9734 p->count -= p->pc_count;
9735 p->pc_count = 0;
9736 if (p->count == 0)
9737 *pp = p->next;
9738 else
9739 pp = &p->next;
9740 }
9741 }
9742
9743 /* Also discard relocs on undefined weak syms with
9744 non-default visibility. */
9745 if (eh->dyn_relocs != NULL
9746 && h->root.type == bfd_link_hash_undefweak)
9747 {
9748 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
9749 eh->dyn_relocs = NULL;
9750
9751 /* Make sure this symbol is output as a dynamic symbol.
9752 Undefined weak syms won't yet be marked as dynamic. */
9753 else if (h->dynindx == -1
9754 && !h->forced_local)
9755 {
9756 if (! bfd_elf_link_record_dynamic_symbol (info, h))
9757 return FALSE;
9758 }
9759 }
9760 }
9761 else if (h->type == STT_GNU_IFUNC)
9762 {
9763 /* A plt entry is always created when making direct calls to
9764 an ifunc, even when building a static executable, but
9765 that doesn't cover all cases. We may have only an ifunc
9766 initialised function pointer for a given ifunc symbol.
9767
9768 For ELFv2, dynamic relocations are not required when
9769 generating a global entry PLT stub. */
9770 if (abiversion (info->output_bfd) >= 2)
9771 {
9772 if (global_entry_stub (h))
9773 eh->dyn_relocs = NULL;
9774 }
9775
9776 /* For ELFv1 we have function descriptors. Descriptors need
9777 to be treated like PLT entries and thus have dynamic
9778 relocations. One exception is when the function
9779 descriptor is copied into .dynbss (which should only
9780 happen with ancient versions of gcc). */
9781 else if (h->needs_copy)
9782 eh->dyn_relocs = NULL;
9783 }
9784 else if (ELIMINATE_COPY_RELOCS)
9785 {
9786 /* For the non-pic case, discard space for relocs against
9787 symbols which turn out to need copy relocs or are not
9788 dynamic. */
9789
9790 /* First make sure this symbol is output as a dynamic symbol.
9791 Undefined weak syms won't yet be marked as dynamic. */
9792 if (h->root.type == bfd_link_hash_undefweak
9793 && !h->non_got_ref
9794 && !h->def_regular
9795 && h->dynindx == -1
9796 && !h->forced_local
9797 && !bfd_elf_link_record_dynamic_symbol (info, h))
9798 return FALSE;
9799
9800 if (h->non_got_ref
9801 || h->def_regular
9802 || h->dynindx == -1)
9803 eh->dyn_relocs = NULL;
9804 }
9805
9806 /* Finally, allocate space. */
9807 for (p = eh->dyn_relocs; p != NULL; p = p->next)
9808 {
9809 asection *sreloc = elf_section_data (p->sec)->sreloc;
9810 if (eh->elf.type == STT_GNU_IFUNC)
9811 sreloc = htab->elf.irelplt;
9812 sreloc->size += p->count * sizeof (Elf64_External_Rela);
9813 }
9814 }
9815
9816 if ((htab->elf.dynamic_sections_created
9817 && h->dynindx != -1
9818 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, bfd_link_pic (info), h))
9819 || h->type == STT_GNU_IFUNC)
9820 {
9821 struct plt_entry *pent;
9822 bfd_boolean doneone = FALSE;
9823 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
9824 if (pent->plt.refcount > 0)
9825 {
9826 if (!htab->elf.dynamic_sections_created
9827 || h->dynindx == -1)
9828 {
9829 s = htab->elf.iplt;
9830 pent->plt.offset = s->size;
9831 s->size += PLT_ENTRY_SIZE (htab);
9832 s = htab->elf.irelplt;
9833 }
9834 else
9835 {
9836 /* If this is the first .plt entry, make room for the special
9837 first entry. */
9838 s = htab->elf.splt;
9839 if (s->size == 0)
9840 s->size += PLT_INITIAL_ENTRY_SIZE (htab);
9841
9842 pent->plt.offset = s->size;
9843
9844 /* Make room for this entry. */
9845 s->size += PLT_ENTRY_SIZE (htab);
9846
9847 /* Make room for the .glink code. */
9848 s = htab->glink;
9849 if (s->size == 0)
9850 s->size += GLINK_CALL_STUB_SIZE;
9851 if (htab->opd_abi)
9852 {
9853 /* We need bigger stubs past index 32767. */
9854 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
9855 s->size += 4;
9856 s->size += 2*4;
9857 }
9858 else
9859 s->size += 4;
9860
9861 /* We also need to make an entry in the .rela.plt section. */
9862 s = htab->elf.srelplt;
9863 }
9864 s->size += sizeof (Elf64_External_Rela);
9865 doneone = TRUE;
9866 }
9867 else
9868 pent->plt.offset = (bfd_vma) -1;
9869 if (!doneone)
9870 {
9871 h->plt.plist = NULL;
9872 h->needs_plt = 0;
9873 }
9874 }
9875 else
9876 {
9877 h->plt.plist = NULL;
9878 h->needs_plt = 0;
9879 }
9880
9881 return TRUE;
9882 }
9883
9884 /* Called via elf_link_hash_traverse from ppc64_elf_size_dynamic_sections
9885 to set up space for global entry stubs. These are put in glink,
9886 after the branch table. */
9887
9888 static bfd_boolean
9889 size_global_entry_stubs (struct elf_link_hash_entry *h, void *inf)
9890 {
9891 struct bfd_link_info *info;
9892 struct ppc_link_hash_table *htab;
9893 struct plt_entry *pent;
9894 asection *s;
9895
9896 if (h->root.type == bfd_link_hash_indirect)
9897 return TRUE;
9898
9899 if (!h->pointer_equality_needed)
9900 return TRUE;
9901
9902 if (h->def_regular)
9903 return TRUE;
9904
9905 info = inf;
9906 htab = ppc_hash_table (info);
9907 if (htab == NULL)
9908 return FALSE;
9909
9910 s = htab->glink;
9911 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
9912 if (pent->plt.offset != (bfd_vma) -1
9913 && pent->addend == 0)
9914 {
9915 /* For ELFv2, if this symbol is not defined in a regular file
9916 and we are not generating a shared library or pie, then we
9917 need to define the symbol in the executable on a call stub.
9918 This is to avoid text relocations. */
9919 s->size = (s->size + 15) & -16;
9920 h->root.type = bfd_link_hash_defined;
9921 h->root.u.def.section = s;
9922 h->root.u.def.value = s->size;
9923 s->size += 16;
9924 break;
9925 }
9926 return TRUE;
9927 }
9928
9929 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
9930 read-only sections. */
9931
9932 static bfd_boolean
9933 maybe_set_textrel (struct elf_link_hash_entry *h, void *info)
9934 {
9935 if (h->root.type == bfd_link_hash_indirect)
9936 return TRUE;
9937
9938 if (readonly_dynrelocs (h))
9939 {
9940 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
9941
9942 /* Not an error, just cut short the traversal. */
9943 return FALSE;
9944 }
9945 return TRUE;
9946 }
9947
9948 /* Set the sizes of the dynamic sections. */
9949
9950 static bfd_boolean
9951 ppc64_elf_size_dynamic_sections (bfd *output_bfd,
9952 struct bfd_link_info *info)
9953 {
9954 struct ppc_link_hash_table *htab;
9955 bfd *dynobj;
9956 asection *s;
9957 bfd_boolean relocs;
9958 bfd *ibfd;
9959 struct got_entry *first_tlsld;
9960
9961 htab = ppc_hash_table (info);
9962 if (htab == NULL)
9963 return FALSE;
9964
9965 dynobj = htab->elf.dynobj;
9966 if (dynobj == NULL)
9967 abort ();
9968
9969 if (htab->elf.dynamic_sections_created)
9970 {
9971 /* Set the contents of the .interp section to the interpreter. */
9972 if (bfd_link_executable (info) && !info->nointerp)
9973 {
9974 s = bfd_get_linker_section (dynobj, ".interp");
9975 if (s == NULL)
9976 abort ();
9977 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
9978 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
9979 }
9980 }
9981
9982 /* Set up .got offsets for local syms, and space for local dynamic
9983 relocs. */
9984 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
9985 {
9986 struct got_entry **lgot_ents;
9987 struct got_entry **end_lgot_ents;
9988 struct plt_entry **local_plt;
9989 struct plt_entry **end_local_plt;
9990 unsigned char *lgot_masks;
9991 bfd_size_type locsymcount;
9992 Elf_Internal_Shdr *symtab_hdr;
9993
9994 if (!is_ppc64_elf (ibfd))
9995 continue;
9996
9997 for (s = ibfd->sections; s != NULL; s = s->next)
9998 {
9999 struct ppc_dyn_relocs *p;
10000
10001 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
10002 {
10003 if (!bfd_is_abs_section (p->sec)
10004 && bfd_is_abs_section (p->sec->output_section))
10005 {
10006 /* Input section has been discarded, either because
10007 it is a copy of a linkonce section or due to
10008 linker script /DISCARD/, so we'll be discarding
10009 the relocs too. */
10010 }
10011 else if (p->count != 0)
10012 {
10013 asection *srel = elf_section_data (p->sec)->sreloc;
10014 if (p->ifunc)
10015 srel = htab->elf.irelplt;
10016 srel->size += p->count * sizeof (Elf64_External_Rela);
10017 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
10018 info->flags |= DF_TEXTREL;
10019 }
10020 }
10021 }
10022
10023 lgot_ents = elf_local_got_ents (ibfd);
10024 if (!lgot_ents)
10025 continue;
10026
10027 symtab_hdr = &elf_symtab_hdr (ibfd);
10028 locsymcount = symtab_hdr->sh_info;
10029 end_lgot_ents = lgot_ents + locsymcount;
10030 local_plt = (struct plt_entry **) end_lgot_ents;
10031 end_local_plt = local_plt + locsymcount;
10032 lgot_masks = (unsigned char *) end_local_plt;
10033 s = ppc64_elf_tdata (ibfd)->got;
10034 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
10035 {
10036 struct got_entry **pent, *ent;
10037
10038 pent = lgot_ents;
10039 while ((ent = *pent) != NULL)
10040 if (ent->got.refcount > 0)
10041 {
10042 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
10043 {
10044 ppc64_tlsld_got (ibfd)->got.refcount += 1;
10045 *pent = ent->next;
10046 }
10047 else
10048 {
10049 unsigned int ent_size = 8;
10050 unsigned int rel_size = sizeof (Elf64_External_Rela);
10051
10052 ent->got.offset = s->size;
10053 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
10054 {
10055 ent_size *= 2;
10056 rel_size *= 2;
10057 }
10058 s->size += ent_size;
10059 if ((*lgot_masks & PLT_IFUNC) != 0)
10060 {
10061 htab->elf.irelplt->size += rel_size;
10062 htab->got_reli_size += rel_size;
10063 }
10064 else if (bfd_link_pic (info))
10065 {
10066 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
10067 srel->size += rel_size;
10068 }
10069 pent = &ent->next;
10070 }
10071 }
10072 else
10073 *pent = ent->next;
10074 }
10075
10076 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
10077 for (; local_plt < end_local_plt; ++local_plt)
10078 {
10079 struct plt_entry *ent;
10080
10081 for (ent = *local_plt; ent != NULL; ent = ent->next)
10082 if (ent->plt.refcount > 0)
10083 {
10084 s = htab->elf.iplt;
10085 ent->plt.offset = s->size;
10086 s->size += PLT_ENTRY_SIZE (htab);
10087
10088 htab->elf.irelplt->size += sizeof (Elf64_External_Rela);
10089 }
10090 else
10091 ent->plt.offset = (bfd_vma) -1;
10092 }
10093 }
10094
10095 /* Allocate global sym .plt and .got entries, and space for global
10096 sym dynamic relocs. */
10097 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
10098 /* Stash the end of glink branch table. */
10099 if (htab->glink != NULL)
10100 htab->glink->rawsize = htab->glink->size;
10101
10102 if (!htab->opd_abi && !bfd_link_pic (info))
10103 elf_link_hash_traverse (&htab->elf, size_global_entry_stubs, info);
10104
10105 first_tlsld = NULL;
10106 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
10107 {
10108 struct got_entry *ent;
10109
10110 if (!is_ppc64_elf (ibfd))
10111 continue;
10112
10113 ent = ppc64_tlsld_got (ibfd);
10114 if (ent->got.refcount > 0)
10115 {
10116 if (!htab->do_multi_toc && first_tlsld != NULL)
10117 {
10118 ent->is_indirect = TRUE;
10119 ent->got.ent = first_tlsld;
10120 }
10121 else
10122 {
10123 if (first_tlsld == NULL)
10124 first_tlsld = ent;
10125 s = ppc64_elf_tdata (ibfd)->got;
10126 ent->got.offset = s->size;
10127 ent->owner = ibfd;
10128 s->size += 16;
10129 if (bfd_link_pic (info))
10130 {
10131 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
10132 srel->size += sizeof (Elf64_External_Rela);
10133 }
10134 }
10135 }
10136 else
10137 ent->got.offset = (bfd_vma) -1;
10138 }
10139
10140 /* We now have determined the sizes of the various dynamic sections.
10141 Allocate memory for them. */
10142 relocs = FALSE;
10143 for (s = dynobj->sections; s != NULL; s = s->next)
10144 {
10145 if ((s->flags & SEC_LINKER_CREATED) == 0)
10146 continue;
10147
10148 if (s == htab->brlt || s == htab->relbrlt)
10149 /* These haven't been allocated yet; don't strip. */
10150 continue;
10151 else if (s == htab->elf.sgot
10152 || s == htab->elf.splt
10153 || s == htab->elf.iplt
10154 || s == htab->glink
10155 || s == htab->dynbss)
10156 {
10157 /* Strip this section if we don't need it; see the
10158 comment below. */
10159 }
10160 else if (s == htab->glink_eh_frame)
10161 {
10162 if (!bfd_is_abs_section (s->output_section))
10163 /* Not sized yet. */
10164 continue;
10165 }
10166 else if (CONST_STRNEQ (s->name, ".rela"))
10167 {
10168 if (s->size != 0)
10169 {
10170 if (s != htab->elf.srelplt)
10171 relocs = TRUE;
10172
10173 /* We use the reloc_count field as a counter if we need
10174 to copy relocs into the output file. */
10175 s->reloc_count = 0;
10176 }
10177 }
10178 else
10179 {
10180 /* It's not one of our sections, so don't allocate space. */
10181 continue;
10182 }
10183
10184 if (s->size == 0)
10185 {
10186 /* If we don't need this section, strip it from the
10187 output file. This is mostly to handle .rela.bss and
10188 .rela.plt. We must create both sections in
10189 create_dynamic_sections, because they must be created
10190 before the linker maps input sections to output
10191 sections. The linker does that before
10192 adjust_dynamic_symbol is called, and it is that
10193 function which decides whether anything needs to go
10194 into these sections. */
10195 s->flags |= SEC_EXCLUDE;
10196 continue;
10197 }
10198
10199 if ((s->flags & SEC_HAS_CONTENTS) == 0)
10200 continue;
10201
10202 /* Allocate memory for the section contents. We use bfd_zalloc
10203 here in case unused entries are not reclaimed before the
10204 section's contents are written out. This should not happen,
10205 but this way if it does we get a R_PPC64_NONE reloc in .rela
10206 sections instead of garbage.
10207 We also rely on the section contents being zero when writing
10208 the GOT. */
10209 s->contents = bfd_zalloc (dynobj, s->size);
10210 if (s->contents == NULL)
10211 return FALSE;
10212 }
10213
10214 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
10215 {
10216 if (!is_ppc64_elf (ibfd))
10217 continue;
10218
10219 s = ppc64_elf_tdata (ibfd)->got;
10220 if (s != NULL && s != htab->elf.sgot)
10221 {
10222 if (s->size == 0)
10223 s->flags |= SEC_EXCLUDE;
10224 else
10225 {
10226 s->contents = bfd_zalloc (ibfd, s->size);
10227 if (s->contents == NULL)
10228 return FALSE;
10229 }
10230 }
10231 s = ppc64_elf_tdata (ibfd)->relgot;
10232 if (s != NULL)
10233 {
10234 if (s->size == 0)
10235 s->flags |= SEC_EXCLUDE;
10236 else
10237 {
10238 s->contents = bfd_zalloc (ibfd, s->size);
10239 if (s->contents == NULL)
10240 return FALSE;
10241 relocs = TRUE;
10242 s->reloc_count = 0;
10243 }
10244 }
10245 }
10246
10247 if (htab->elf.dynamic_sections_created)
10248 {
10249 bfd_boolean tls_opt;
10250
10251 /* Add some entries to the .dynamic section. We fill in the
10252 values later, in ppc64_elf_finish_dynamic_sections, but we
10253 must add the entries now so that we get the correct size for
10254 the .dynamic section. The DT_DEBUG entry is filled in by the
10255 dynamic linker and used by the debugger. */
10256 #define add_dynamic_entry(TAG, VAL) \
10257 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
10258
10259 if (bfd_link_executable (info))
10260 {
10261 if (!add_dynamic_entry (DT_DEBUG, 0))
10262 return FALSE;
10263 }
10264
10265 if (htab->elf.splt != NULL && htab->elf.splt->size != 0)
10266 {
10267 if (!add_dynamic_entry (DT_PLTGOT, 0)
10268 || !add_dynamic_entry (DT_PLTRELSZ, 0)
10269 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
10270 || !add_dynamic_entry (DT_JMPREL, 0)
10271 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
10272 return FALSE;
10273 }
10274
10275 if (NO_OPD_RELOCS && abiversion (output_bfd) <= 1)
10276 {
10277 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
10278 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
10279 return FALSE;
10280 }
10281
10282 tls_opt = (htab->params->tls_get_addr_opt
10283 && htab->tls_get_addr_fd != NULL
10284 && htab->tls_get_addr_fd->elf.plt.plist != NULL);
10285 if (tls_opt || !htab->opd_abi)
10286 {
10287 if (!add_dynamic_entry (DT_PPC64_OPT, tls_opt ? PPC64_OPT_TLS : 0))
10288 return FALSE;
10289 }
10290
10291 if (relocs)
10292 {
10293 if (!add_dynamic_entry (DT_RELA, 0)
10294 || !add_dynamic_entry (DT_RELASZ, 0)
10295 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
10296 return FALSE;
10297
10298 /* If any dynamic relocs apply to a read-only section,
10299 then we need a DT_TEXTREL entry. */
10300 if ((info->flags & DF_TEXTREL) == 0)
10301 elf_link_hash_traverse (&htab->elf, maybe_set_textrel, info);
10302
10303 if ((info->flags & DF_TEXTREL) != 0)
10304 {
10305 if (!add_dynamic_entry (DT_TEXTREL, 0))
10306 return FALSE;
10307 }
10308 }
10309 }
10310 #undef add_dynamic_entry
10311
10312 return TRUE;
10313 }
10314
10315 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
10316
10317 static bfd_boolean
10318 ppc64_elf_hash_symbol (struct elf_link_hash_entry *h)
10319 {
10320 if (h->plt.plist != NULL
10321 && !h->def_regular
10322 && !h->pointer_equality_needed)
10323 return FALSE;
10324
10325 return _bfd_elf_hash_symbol (h);
10326 }
10327
10328 /* Determine the type of stub needed, if any, for a call. */
10329
10330 static inline enum ppc_stub_type
10331 ppc_type_of_stub (asection *input_sec,
10332 const Elf_Internal_Rela *rel,
10333 struct ppc_link_hash_entry **hash,
10334 struct plt_entry **plt_ent,
10335 bfd_vma destination,
10336 unsigned long local_off)
10337 {
10338 struct ppc_link_hash_entry *h = *hash;
10339 bfd_vma location;
10340 bfd_vma branch_offset;
10341 bfd_vma max_branch_offset;
10342 enum elf_ppc64_reloc_type r_type;
10343
10344 if (h != NULL)
10345 {
10346 struct plt_entry *ent;
10347 struct ppc_link_hash_entry *fdh = h;
10348 if (h->oh != NULL
10349 && h->oh->is_func_descriptor)
10350 {
10351 fdh = ppc_follow_link (h->oh);
10352 *hash = fdh;
10353 }
10354
10355 for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next)
10356 if (ent->addend == rel->r_addend
10357 && ent->plt.offset != (bfd_vma) -1)
10358 {
10359 *plt_ent = ent;
10360 return ppc_stub_plt_call;
10361 }
10362
10363 /* Here, we know we don't have a plt entry. If we don't have a
10364 either a defined function descriptor or a defined entry symbol
10365 in a regular object file, then it is pointless trying to make
10366 any other type of stub. */
10367 if (!is_static_defined (&fdh->elf)
10368 && !is_static_defined (&h->elf))
10369 return ppc_stub_none;
10370 }
10371 else if (elf_local_got_ents (input_sec->owner) != NULL)
10372 {
10373 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (input_sec->owner);
10374 struct plt_entry **local_plt = (struct plt_entry **)
10375 elf_local_got_ents (input_sec->owner) + symtab_hdr->sh_info;
10376 unsigned long r_symndx = ELF64_R_SYM (rel->r_info);
10377
10378 if (local_plt[r_symndx] != NULL)
10379 {
10380 struct plt_entry *ent;
10381
10382 for (ent = local_plt[r_symndx]; ent != NULL; ent = ent->next)
10383 if (ent->addend == rel->r_addend
10384 && ent->plt.offset != (bfd_vma) -1)
10385 {
10386 *plt_ent = ent;
10387 return ppc_stub_plt_call;
10388 }
10389 }
10390 }
10391
10392 /* Determine where the call point is. */
10393 location = (input_sec->output_offset
10394 + input_sec->output_section->vma
10395 + rel->r_offset);
10396
10397 branch_offset = destination - location;
10398 r_type = ELF64_R_TYPE (rel->r_info);
10399
10400 /* Determine if a long branch stub is needed. */
10401 max_branch_offset = 1 << 25;
10402 if (r_type != R_PPC64_REL24)
10403 max_branch_offset = 1 << 15;
10404
10405 if (branch_offset + max_branch_offset >= 2 * max_branch_offset - local_off)
10406 /* We need a stub. Figure out whether a long_branch or plt_branch
10407 is needed later. */
10408 return ppc_stub_long_branch;
10409
10410 return ppc_stub_none;
10411 }
10412
10413 /* With power7 weakly ordered memory model, it is possible for ld.so
10414 to update a plt entry in one thread and have another thread see a
10415 stale zero toc entry. To avoid this we need some sort of acquire
10416 barrier in the call stub. One solution is to make the load of the
10417 toc word seem to appear to depend on the load of the function entry
10418 word. Another solution is to test for r2 being zero, and branch to
10419 the appropriate glink entry if so.
10420
10421 . fake dep barrier compare
10422 . ld 12,xxx(2) ld 12,xxx(2)
10423 . mtctr 12 mtctr 12
10424 . xor 11,12,12 ld 2,xxx+8(2)
10425 . add 2,2,11 cmpldi 2,0
10426 . ld 2,xxx+8(2) bnectr+
10427 . bctr b <glink_entry>
10428
10429 The solution involving the compare turns out to be faster, so
10430 that's what we use unless the branch won't reach. */
10431
10432 #define ALWAYS_USE_FAKE_DEP 0
10433 #define ALWAYS_EMIT_R2SAVE 0
10434
10435 #define PPC_LO(v) ((v) & 0xffff)
10436 #define PPC_HI(v) (((v) >> 16) & 0xffff)
10437 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
10438
10439 static inline unsigned int
10440 plt_stub_size (struct ppc_link_hash_table *htab,
10441 struct ppc_stub_hash_entry *stub_entry,
10442 bfd_vma off)
10443 {
10444 unsigned size = 12;
10445
10446 if (ALWAYS_EMIT_R2SAVE
10447 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10448 size += 4;
10449 if (PPC_HA (off) != 0)
10450 size += 4;
10451 if (htab->opd_abi)
10452 {
10453 size += 4;
10454 if (htab->params->plt_static_chain)
10455 size += 4;
10456 if (htab->params->plt_thread_safe
10457 && htab->elf.dynamic_sections_created
10458 && stub_entry->h != NULL
10459 && stub_entry->h->elf.dynindx != -1)
10460 size += 8;
10461 if (PPC_HA (off + 8 + 8 * htab->params->plt_static_chain) != PPC_HA (off))
10462 size += 4;
10463 }
10464 if (stub_entry->h != NULL
10465 && (stub_entry->h == htab->tls_get_addr_fd
10466 || stub_entry->h == htab->tls_get_addr)
10467 && htab->params->tls_get_addr_opt)
10468 size += 13 * 4;
10469 return size;
10470 }
10471
10472 /* If this stub would cross fewer 2**plt_stub_align boundaries if we align,
10473 then return the padding needed to do so. */
10474 static inline unsigned int
10475 plt_stub_pad (struct ppc_link_hash_table *htab,
10476 struct ppc_stub_hash_entry *stub_entry,
10477 bfd_vma plt_off)
10478 {
10479 int stub_align = 1 << htab->params->plt_stub_align;
10480 unsigned stub_size = plt_stub_size (htab, stub_entry, plt_off);
10481 bfd_vma stub_off = stub_entry->group->stub_sec->size;
10482
10483 if (((stub_off + stub_size - 1) & -stub_align) - (stub_off & -stub_align)
10484 > ((stub_size - 1) & -stub_align))
10485 return stub_align - (stub_off & (stub_align - 1));
10486 return 0;
10487 }
10488
10489 /* Build a .plt call stub. */
10490
10491 static inline bfd_byte *
10492 build_plt_stub (struct ppc_link_hash_table *htab,
10493 struct ppc_stub_hash_entry *stub_entry,
10494 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
10495 {
10496 bfd *obfd = htab->params->stub_bfd;
10497 bfd_boolean plt_load_toc = htab->opd_abi;
10498 bfd_boolean plt_static_chain = htab->params->plt_static_chain;
10499 bfd_boolean plt_thread_safe = (htab->params->plt_thread_safe
10500 && htab->elf.dynamic_sections_created
10501 && stub_entry->h != NULL
10502 && stub_entry->h->elf.dynindx != -1);
10503 bfd_boolean use_fake_dep = plt_thread_safe;
10504 bfd_vma cmp_branch_off = 0;
10505
10506 if (!ALWAYS_USE_FAKE_DEP
10507 && plt_load_toc
10508 && plt_thread_safe
10509 && !((stub_entry->h == htab->tls_get_addr_fd
10510 || stub_entry->h == htab->tls_get_addr)
10511 && htab->params->tls_get_addr_opt))
10512 {
10513 bfd_vma pltoff = stub_entry->plt_ent->plt.offset & ~1;
10514 bfd_vma pltindex = ((pltoff - PLT_INITIAL_ENTRY_SIZE (htab))
10515 / PLT_ENTRY_SIZE (htab));
10516 bfd_vma glinkoff = GLINK_CALL_STUB_SIZE + pltindex * 8;
10517 bfd_vma to, from;
10518
10519 if (pltindex > 32768)
10520 glinkoff += (pltindex - 32768) * 4;
10521 to = (glinkoff
10522 + htab->glink->output_offset
10523 + htab->glink->output_section->vma);
10524 from = (p - stub_entry->group->stub_sec->contents
10525 + 4 * (ALWAYS_EMIT_R2SAVE
10526 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10527 + 4 * (PPC_HA (offset) != 0)
10528 + 4 * (PPC_HA (offset + 8 + 8 * plt_static_chain)
10529 != PPC_HA (offset))
10530 + 4 * (plt_static_chain != 0)
10531 + 20
10532 + stub_entry->group->stub_sec->output_offset
10533 + stub_entry->group->stub_sec->output_section->vma);
10534 cmp_branch_off = to - from;
10535 use_fake_dep = cmp_branch_off + (1 << 25) >= (1 << 26);
10536 }
10537
10538 if (PPC_HA (offset) != 0)
10539 {
10540 if (r != NULL)
10541 {
10542 if (ALWAYS_EMIT_R2SAVE
10543 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10544 r[0].r_offset += 4;
10545 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
10546 r[1].r_offset = r[0].r_offset + 4;
10547 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10548 r[1].r_addend = r[0].r_addend;
10549 if (plt_load_toc)
10550 {
10551 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10552 {
10553 r[2].r_offset = r[1].r_offset + 4;
10554 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO);
10555 r[2].r_addend = r[0].r_addend;
10556 }
10557 else
10558 {
10559 r[2].r_offset = r[1].r_offset + 8 + 8 * use_fake_dep;
10560 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10561 r[2].r_addend = r[0].r_addend + 8;
10562 if (plt_static_chain)
10563 {
10564 r[3].r_offset = r[2].r_offset + 4;
10565 r[3].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10566 r[3].r_addend = r[0].r_addend + 16;
10567 }
10568 }
10569 }
10570 }
10571 if (ALWAYS_EMIT_R2SAVE
10572 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10573 bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p), p += 4;
10574 if (plt_load_toc)
10575 {
10576 bfd_put_32 (obfd, ADDIS_R11_R2 | PPC_HA (offset), p), p += 4;
10577 bfd_put_32 (obfd, LD_R12_0R11 | PPC_LO (offset), p), p += 4;
10578 }
10579 else
10580 {
10581 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
10582 bfd_put_32 (obfd, LD_R12_0R12 | PPC_LO (offset), p), p += 4;
10583 }
10584 if (plt_load_toc
10585 && PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10586 {
10587 bfd_put_32 (obfd, ADDI_R11_R11 | PPC_LO (offset), p), p += 4;
10588 offset = 0;
10589 }
10590 bfd_put_32 (obfd, MTCTR_R12, p), p += 4;
10591 if (plt_load_toc)
10592 {
10593 if (use_fake_dep)
10594 {
10595 bfd_put_32 (obfd, XOR_R2_R12_R12, p), p += 4;
10596 bfd_put_32 (obfd, ADD_R11_R11_R2, p), p += 4;
10597 }
10598 bfd_put_32 (obfd, LD_R2_0R11 | PPC_LO (offset + 8), p), p += 4;
10599 if (plt_static_chain)
10600 bfd_put_32 (obfd, LD_R11_0R11 | PPC_LO (offset + 16), p), p += 4;
10601 }
10602 }
10603 else
10604 {
10605 if (r != NULL)
10606 {
10607 if (ALWAYS_EMIT_R2SAVE
10608 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10609 r[0].r_offset += 4;
10610 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10611 if (plt_load_toc)
10612 {
10613 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10614 {
10615 r[1].r_offset = r[0].r_offset + 4;
10616 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16);
10617 r[1].r_addend = r[0].r_addend;
10618 }
10619 else
10620 {
10621 r[1].r_offset = r[0].r_offset + 8 + 8 * use_fake_dep;
10622 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10623 r[1].r_addend = r[0].r_addend + 8 + 8 * plt_static_chain;
10624 if (plt_static_chain)
10625 {
10626 r[2].r_offset = r[1].r_offset + 4;
10627 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10628 r[2].r_addend = r[0].r_addend + 8;
10629 }
10630 }
10631 }
10632 }
10633 if (ALWAYS_EMIT_R2SAVE
10634 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10635 bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p), p += 4;
10636 bfd_put_32 (obfd, LD_R12_0R2 | PPC_LO (offset), p), p += 4;
10637 if (plt_load_toc
10638 && PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10639 {
10640 bfd_put_32 (obfd, ADDI_R2_R2 | PPC_LO (offset), p), p += 4;
10641 offset = 0;
10642 }
10643 bfd_put_32 (obfd, MTCTR_R12, p), p += 4;
10644 if (plt_load_toc)
10645 {
10646 if (use_fake_dep)
10647 {
10648 bfd_put_32 (obfd, XOR_R11_R12_R12, p), p += 4;
10649 bfd_put_32 (obfd, ADD_R2_R2_R11, p), p += 4;
10650 }
10651 if (plt_static_chain)
10652 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset + 16), p), p += 4;
10653 bfd_put_32 (obfd, LD_R2_0R2 | PPC_LO (offset + 8), p), p += 4;
10654 }
10655 }
10656 if (plt_load_toc && plt_thread_safe && !use_fake_dep)
10657 {
10658 bfd_put_32 (obfd, CMPLDI_R2_0, p), p += 4;
10659 bfd_put_32 (obfd, BNECTR_P4, p), p += 4;
10660 bfd_put_32 (obfd, B_DOT | (cmp_branch_off & 0x3fffffc), p), p += 4;
10661 }
10662 else
10663 bfd_put_32 (obfd, BCTR, p), p += 4;
10664 return p;
10665 }
10666
10667 /* Build a special .plt call stub for __tls_get_addr. */
10668
10669 #define LD_R11_0R3 0xe9630000
10670 #define LD_R12_0R3 0xe9830000
10671 #define MR_R0_R3 0x7c601b78
10672 #define CMPDI_R11_0 0x2c2b0000
10673 #define ADD_R3_R12_R13 0x7c6c6a14
10674 #define BEQLR 0x4d820020
10675 #define MR_R3_R0 0x7c030378
10676 #define STD_R11_0R1 0xf9610000
10677 #define BCTRL 0x4e800421
10678 #define LD_R11_0R1 0xe9610000
10679 #define MTLR_R11 0x7d6803a6
10680
10681 static inline bfd_byte *
10682 build_tls_get_addr_stub (struct ppc_link_hash_table *htab,
10683 struct ppc_stub_hash_entry *stub_entry,
10684 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
10685 {
10686 bfd *obfd = htab->params->stub_bfd;
10687
10688 bfd_put_32 (obfd, LD_R11_0R3 + 0, p), p += 4;
10689 bfd_put_32 (obfd, LD_R12_0R3 + 8, p), p += 4;
10690 bfd_put_32 (obfd, MR_R0_R3, p), p += 4;
10691 bfd_put_32 (obfd, CMPDI_R11_0, p), p += 4;
10692 bfd_put_32 (obfd, ADD_R3_R12_R13, p), p += 4;
10693 bfd_put_32 (obfd, BEQLR, p), p += 4;
10694 bfd_put_32 (obfd, MR_R3_R0, p), p += 4;
10695 bfd_put_32 (obfd, MFLR_R11, p), p += 4;
10696 bfd_put_32 (obfd, STD_R11_0R1 + STK_LINKER (htab), p), p += 4;
10697
10698 if (r != NULL)
10699 r[0].r_offset += 9 * 4;
10700 p = build_plt_stub (htab, stub_entry, p, offset, r);
10701 bfd_put_32 (obfd, BCTRL, p - 4);
10702
10703 bfd_put_32 (obfd, LD_R2_0R1 + STK_TOC (htab), p), p += 4;
10704 bfd_put_32 (obfd, LD_R11_0R1 + STK_LINKER (htab), p), p += 4;
10705 bfd_put_32 (obfd, MTLR_R11, p), p += 4;
10706 bfd_put_32 (obfd, BLR, p), p += 4;
10707
10708 return p;
10709 }
10710
10711 static Elf_Internal_Rela *
10712 get_relocs (asection *sec, int count)
10713 {
10714 Elf_Internal_Rela *relocs;
10715 struct bfd_elf_section_data *elfsec_data;
10716
10717 elfsec_data = elf_section_data (sec);
10718 relocs = elfsec_data->relocs;
10719 if (relocs == NULL)
10720 {
10721 bfd_size_type relsize;
10722 relsize = sec->reloc_count * sizeof (*relocs);
10723 relocs = bfd_alloc (sec->owner, relsize);
10724 if (relocs == NULL)
10725 return NULL;
10726 elfsec_data->relocs = relocs;
10727 elfsec_data->rela.hdr = bfd_zalloc (sec->owner,
10728 sizeof (Elf_Internal_Shdr));
10729 if (elfsec_data->rela.hdr == NULL)
10730 return NULL;
10731 elfsec_data->rela.hdr->sh_size = (sec->reloc_count
10732 * sizeof (Elf64_External_Rela));
10733 elfsec_data->rela.hdr->sh_entsize = sizeof (Elf64_External_Rela);
10734 sec->reloc_count = 0;
10735 }
10736 relocs += sec->reloc_count;
10737 sec->reloc_count += count;
10738 return relocs;
10739 }
10740
10741 static bfd_vma
10742 get_r2off (struct bfd_link_info *info,
10743 struct ppc_stub_hash_entry *stub_entry)
10744 {
10745 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10746 bfd_vma r2off = htab->sec_info[stub_entry->target_section->id].toc_off;
10747
10748 if (r2off == 0)
10749 {
10750 /* Support linking -R objects. Get the toc pointer from the
10751 opd entry. */
10752 char buf[8];
10753 if (!htab->opd_abi)
10754 return r2off;
10755 asection *opd = stub_entry->h->elf.root.u.def.section;
10756 bfd_vma opd_off = stub_entry->h->elf.root.u.def.value;
10757
10758 if (strcmp (opd->name, ".opd") != 0
10759 || opd->reloc_count != 0)
10760 {
10761 info->callbacks->einfo (_("%P: cannot find opd entry toc for `%T'\n"),
10762 stub_entry->h->elf.root.root.string);
10763 bfd_set_error (bfd_error_bad_value);
10764 return (bfd_vma) -1;
10765 }
10766 if (!bfd_get_section_contents (opd->owner, opd, buf, opd_off + 8, 8))
10767 return (bfd_vma) -1;
10768 r2off = bfd_get_64 (opd->owner, buf);
10769 r2off -= elf_gp (info->output_bfd);
10770 }
10771 r2off -= htab->sec_info[stub_entry->group->link_sec->id].toc_off;
10772 return r2off;
10773 }
10774
10775 static bfd_boolean
10776 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
10777 {
10778 struct ppc_stub_hash_entry *stub_entry;
10779 struct ppc_branch_hash_entry *br_entry;
10780 struct bfd_link_info *info;
10781 struct ppc_link_hash_table *htab;
10782 bfd_byte *loc;
10783 bfd_byte *p;
10784 bfd_vma dest, off;
10785 int size;
10786 Elf_Internal_Rela *r;
10787 asection *plt;
10788
10789 /* Massage our args to the form they really have. */
10790 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
10791 info = in_arg;
10792
10793 htab = ppc_hash_table (info);
10794 if (htab == NULL)
10795 return FALSE;
10796
10797 /* Make a note of the offset within the stubs for this entry. */
10798 stub_entry->stub_offset = stub_entry->group->stub_sec->size;
10799 loc = stub_entry->group->stub_sec->contents + stub_entry->stub_offset;
10800
10801 htab->stub_count[stub_entry->stub_type - 1] += 1;
10802 switch (stub_entry->stub_type)
10803 {
10804 case ppc_stub_long_branch:
10805 case ppc_stub_long_branch_r2off:
10806 /* Branches are relative. This is where we are going to. */
10807 dest = (stub_entry->target_value
10808 + stub_entry->target_section->output_offset
10809 + stub_entry->target_section->output_section->vma);
10810 dest += PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
10811 off = dest;
10812
10813 /* And this is where we are coming from. */
10814 off -= (stub_entry->stub_offset
10815 + stub_entry->group->stub_sec->output_offset
10816 + stub_entry->group->stub_sec->output_section->vma);
10817
10818 size = 4;
10819 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
10820 {
10821 bfd_vma r2off = get_r2off (info, stub_entry);
10822
10823 if (r2off == (bfd_vma) -1)
10824 {
10825 htab->stub_error = TRUE;
10826 return FALSE;
10827 }
10828 bfd_put_32 (htab->params->stub_bfd, STD_R2_0R1 + STK_TOC (htab), loc);
10829 loc += 4;
10830 size = 8;
10831 if (PPC_HA (r2off) != 0)
10832 {
10833 bfd_put_32 (htab->params->stub_bfd,
10834 ADDIS_R2_R2 | PPC_HA (r2off), loc);
10835 loc += 4;
10836 size += 4;
10837 }
10838 if (PPC_LO (r2off) != 0)
10839 {
10840 bfd_put_32 (htab->params->stub_bfd,
10841 ADDI_R2_R2 | PPC_LO (r2off), loc);
10842 loc += 4;
10843 size += 4;
10844 }
10845 off -= size - 4;
10846 }
10847 bfd_put_32 (htab->params->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
10848
10849 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
10850 {
10851 info->callbacks->einfo
10852 (_("%P: long branch stub `%s' offset overflow\n"),
10853 stub_entry->root.string);
10854 htab->stub_error = TRUE;
10855 return FALSE;
10856 }
10857
10858 if (info->emitrelocations)
10859 {
10860 r = get_relocs (stub_entry->group->stub_sec, 1);
10861 if (r == NULL)
10862 return FALSE;
10863 r->r_offset = loc - stub_entry->group->stub_sec->contents;
10864 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
10865 r->r_addend = dest;
10866 if (stub_entry->h != NULL)
10867 {
10868 struct elf_link_hash_entry **hashes;
10869 unsigned long symndx;
10870 struct ppc_link_hash_entry *h;
10871
10872 hashes = elf_sym_hashes (htab->params->stub_bfd);
10873 if (hashes == NULL)
10874 {
10875 bfd_size_type hsize;
10876
10877 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
10878 hashes = bfd_zalloc (htab->params->stub_bfd, hsize);
10879 if (hashes == NULL)
10880 return FALSE;
10881 elf_sym_hashes (htab->params->stub_bfd) = hashes;
10882 htab->stub_globals = 1;
10883 }
10884 symndx = htab->stub_globals++;
10885 h = stub_entry->h;
10886 hashes[symndx] = &h->elf;
10887 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
10888 if (h->oh != NULL && h->oh->is_func)
10889 h = ppc_follow_link (h->oh);
10890 if (h->elf.root.u.def.section != stub_entry->target_section)
10891 /* H is an opd symbol. The addend must be zero. */
10892 r->r_addend = 0;
10893 else
10894 {
10895 off = (h->elf.root.u.def.value
10896 + h->elf.root.u.def.section->output_offset
10897 + h->elf.root.u.def.section->output_section->vma);
10898 r->r_addend -= off;
10899 }
10900 }
10901 }
10902 break;
10903
10904 case ppc_stub_plt_branch:
10905 case ppc_stub_plt_branch_r2off:
10906 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
10907 stub_entry->root.string + 9,
10908 FALSE, FALSE);
10909 if (br_entry == NULL)
10910 {
10911 info->callbacks->einfo (_("%P: can't find branch stub `%s'\n"),
10912 stub_entry->root.string);
10913 htab->stub_error = TRUE;
10914 return FALSE;
10915 }
10916
10917 dest = (stub_entry->target_value
10918 + stub_entry->target_section->output_offset
10919 + stub_entry->target_section->output_section->vma);
10920 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
10921 dest += PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
10922
10923 bfd_put_64 (htab->brlt->owner, dest,
10924 htab->brlt->contents + br_entry->offset);
10925
10926 if (br_entry->iter == htab->stub_iteration)
10927 {
10928 br_entry->iter = 0;
10929
10930 if (htab->relbrlt != NULL)
10931 {
10932 /* Create a reloc for the branch lookup table entry. */
10933 Elf_Internal_Rela rela;
10934 bfd_byte *rl;
10935
10936 rela.r_offset = (br_entry->offset
10937 + htab->brlt->output_offset
10938 + htab->brlt->output_section->vma);
10939 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
10940 rela.r_addend = dest;
10941
10942 rl = htab->relbrlt->contents;
10943 rl += (htab->relbrlt->reloc_count++
10944 * sizeof (Elf64_External_Rela));
10945 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
10946 }
10947 else if (info->emitrelocations)
10948 {
10949 r = get_relocs (htab->brlt, 1);
10950 if (r == NULL)
10951 return FALSE;
10952 /* brlt, being SEC_LINKER_CREATED does not go through the
10953 normal reloc processing. Symbols and offsets are not
10954 translated from input file to output file form, so
10955 set up the offset per the output file. */
10956 r->r_offset = (br_entry->offset
10957 + htab->brlt->output_offset
10958 + htab->brlt->output_section->vma);
10959 r->r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
10960 r->r_addend = dest;
10961 }
10962 }
10963
10964 dest = (br_entry->offset
10965 + htab->brlt->output_offset
10966 + htab->brlt->output_section->vma);
10967
10968 off = (dest
10969 - elf_gp (htab->brlt->output_section->owner)
10970 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
10971
10972 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
10973 {
10974 info->callbacks->einfo
10975 (_("%P: linkage table error against `%T'\n"),
10976 stub_entry->root.string);
10977 bfd_set_error (bfd_error_bad_value);
10978 htab->stub_error = TRUE;
10979 return FALSE;
10980 }
10981
10982 if (info->emitrelocations)
10983 {
10984 r = get_relocs (stub_entry->group->stub_sec, 1 + (PPC_HA (off) != 0));
10985 if (r == NULL)
10986 return FALSE;
10987 r[0].r_offset = loc - stub_entry->group->stub_sec->contents;
10988 if (bfd_big_endian (info->output_bfd))
10989 r[0].r_offset += 2;
10990 if (stub_entry->stub_type == ppc_stub_plt_branch_r2off)
10991 r[0].r_offset += 4;
10992 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10993 r[0].r_addend = dest;
10994 if (PPC_HA (off) != 0)
10995 {
10996 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
10997 r[1].r_offset = r[0].r_offset + 4;
10998 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10999 r[1].r_addend = r[0].r_addend;
11000 }
11001 }
11002
11003 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
11004 {
11005 if (PPC_HA (off) != 0)
11006 {
11007 size = 16;
11008 bfd_put_32 (htab->params->stub_bfd,
11009 ADDIS_R12_R2 | PPC_HA (off), loc);
11010 loc += 4;
11011 bfd_put_32 (htab->params->stub_bfd,
11012 LD_R12_0R12 | PPC_LO (off), loc);
11013 }
11014 else
11015 {
11016 size = 12;
11017 bfd_put_32 (htab->params->stub_bfd,
11018 LD_R12_0R2 | PPC_LO (off), loc);
11019 }
11020 }
11021 else
11022 {
11023 bfd_vma r2off = get_r2off (info, stub_entry);
11024
11025 if (r2off == (bfd_vma) -1)
11026 {
11027 htab->stub_error = TRUE;
11028 return FALSE;
11029 }
11030
11031 bfd_put_32 (htab->params->stub_bfd, STD_R2_0R1 + STK_TOC (htab), loc);
11032 loc += 4;
11033 size = 16;
11034 if (PPC_HA (off) != 0)
11035 {
11036 size += 4;
11037 bfd_put_32 (htab->params->stub_bfd,
11038 ADDIS_R12_R2 | PPC_HA (off), loc);
11039 loc += 4;
11040 bfd_put_32 (htab->params->stub_bfd,
11041 LD_R12_0R12 | PPC_LO (off), loc);
11042 }
11043 else
11044 bfd_put_32 (htab->params->stub_bfd, LD_R12_0R2 | PPC_LO (off), loc);
11045
11046 if (PPC_HA (r2off) != 0)
11047 {
11048 size += 4;
11049 loc += 4;
11050 bfd_put_32 (htab->params->stub_bfd,
11051 ADDIS_R2_R2 | PPC_HA (r2off), loc);
11052 }
11053 if (PPC_LO (r2off) != 0)
11054 {
11055 size += 4;
11056 loc += 4;
11057 bfd_put_32 (htab->params->stub_bfd,
11058 ADDI_R2_R2 | PPC_LO (r2off), loc);
11059 }
11060 }
11061 loc += 4;
11062 bfd_put_32 (htab->params->stub_bfd, MTCTR_R12, loc);
11063 loc += 4;
11064 bfd_put_32 (htab->params->stub_bfd, BCTR, loc);
11065 break;
11066
11067 case ppc_stub_plt_call:
11068 case ppc_stub_plt_call_r2save:
11069 if (stub_entry->h != NULL
11070 && stub_entry->h->is_func_descriptor
11071 && stub_entry->h->oh != NULL)
11072 {
11073 struct ppc_link_hash_entry *fh = ppc_follow_link (stub_entry->h->oh);
11074
11075 /* If the old-ABI "dot-symbol" is undefined make it weak so
11076 we don't get a link error from RELOC_FOR_GLOBAL_SYMBOL. */
11077 if (fh->elf.root.type == bfd_link_hash_undefined)
11078 fh->elf.root.type = bfd_link_hash_undefweak;
11079 /* Stop undo_symbol_twiddle changing it back to undefined. */
11080 fh->was_undefined = 0;
11081 }
11082
11083 /* Now build the stub. */
11084 dest = stub_entry->plt_ent->plt.offset & ~1;
11085 if (dest >= (bfd_vma) -2)
11086 abort ();
11087
11088 plt = htab->elf.splt;
11089 if (!htab->elf.dynamic_sections_created
11090 || stub_entry->h == NULL
11091 || stub_entry->h->elf.dynindx == -1)
11092 plt = htab->elf.iplt;
11093
11094 dest += plt->output_offset + plt->output_section->vma;
11095
11096 if (stub_entry->h == NULL
11097 && (stub_entry->plt_ent->plt.offset & 1) == 0)
11098 {
11099 Elf_Internal_Rela rela;
11100 bfd_byte *rl;
11101
11102 rela.r_offset = dest;
11103 if (htab->opd_abi)
11104 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
11105 else
11106 rela.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
11107 rela.r_addend = (stub_entry->target_value
11108 + stub_entry->target_section->output_offset
11109 + stub_entry->target_section->output_section->vma);
11110
11111 rl = (htab->elf.irelplt->contents
11112 + (htab->elf.irelplt->reloc_count++
11113 * sizeof (Elf64_External_Rela)));
11114 bfd_elf64_swap_reloca_out (info->output_bfd, &rela, rl);
11115 stub_entry->plt_ent->plt.offset |= 1;
11116 }
11117
11118 off = (dest
11119 - elf_gp (plt->output_section->owner)
11120 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11121
11122 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
11123 {
11124 info->callbacks->einfo
11125 (_("%P: linkage table error against `%T'\n"),
11126 stub_entry->h != NULL
11127 ? stub_entry->h->elf.root.root.string
11128 : "<local sym>");
11129 bfd_set_error (bfd_error_bad_value);
11130 htab->stub_error = TRUE;
11131 return FALSE;
11132 }
11133
11134 if (htab->params->plt_stub_align != 0)
11135 {
11136 unsigned pad = plt_stub_pad (htab, stub_entry, off);
11137
11138 stub_entry->group->stub_sec->size += pad;
11139 stub_entry->stub_offset = stub_entry->group->stub_sec->size;
11140 loc += pad;
11141 }
11142
11143 r = NULL;
11144 if (info->emitrelocations)
11145 {
11146 r = get_relocs (stub_entry->group->stub_sec,
11147 ((PPC_HA (off) != 0)
11148 + (htab->opd_abi
11149 ? 2 + (htab->params->plt_static_chain
11150 && PPC_HA (off + 16) == PPC_HA (off))
11151 : 1)));
11152 if (r == NULL)
11153 return FALSE;
11154 r[0].r_offset = loc - stub_entry->group->stub_sec->contents;
11155 if (bfd_big_endian (info->output_bfd))
11156 r[0].r_offset += 2;
11157 r[0].r_addend = dest;
11158 }
11159 if (stub_entry->h != NULL
11160 && (stub_entry->h == htab->tls_get_addr_fd
11161 || stub_entry->h == htab->tls_get_addr)
11162 && htab->params->tls_get_addr_opt)
11163 p = build_tls_get_addr_stub (htab, stub_entry, loc, off, r);
11164 else
11165 p = build_plt_stub (htab, stub_entry, loc, off, r);
11166 size = p - loc;
11167 break;
11168
11169 case ppc_stub_save_res:
11170 return TRUE;
11171
11172 default:
11173 BFD_FAIL ();
11174 return FALSE;
11175 }
11176
11177 stub_entry->group->stub_sec->size += size;
11178
11179 if (htab->params->emit_stub_syms)
11180 {
11181 struct elf_link_hash_entry *h;
11182 size_t len1, len2;
11183 char *name;
11184 const char *const stub_str[] = { "long_branch",
11185 "long_branch_r2off",
11186 "plt_branch",
11187 "plt_branch_r2off",
11188 "plt_call",
11189 "plt_call" };
11190
11191 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
11192 len2 = strlen (stub_entry->root.string);
11193 name = bfd_malloc (len1 + len2 + 2);
11194 if (name == NULL)
11195 return FALSE;
11196 memcpy (name, stub_entry->root.string, 9);
11197 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
11198 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
11199 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
11200 if (h == NULL)
11201 return FALSE;
11202 if (h->root.type == bfd_link_hash_new)
11203 {
11204 h->root.type = bfd_link_hash_defined;
11205 h->root.u.def.section = stub_entry->group->stub_sec;
11206 h->root.u.def.value = stub_entry->stub_offset;
11207 h->ref_regular = 1;
11208 h->def_regular = 1;
11209 h->ref_regular_nonweak = 1;
11210 h->forced_local = 1;
11211 h->non_elf = 0;
11212 h->root.linker_def = 1;
11213 }
11214 }
11215
11216 return TRUE;
11217 }
11218
11219 /* As above, but don't actually build the stub. Just bump offset so
11220 we know stub section sizes, and select plt_branch stubs where
11221 long_branch stubs won't do. */
11222
11223 static bfd_boolean
11224 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
11225 {
11226 struct ppc_stub_hash_entry *stub_entry;
11227 struct bfd_link_info *info;
11228 struct ppc_link_hash_table *htab;
11229 bfd_vma off;
11230 int size;
11231
11232 /* Massage our args to the form they really have. */
11233 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
11234 info = in_arg;
11235
11236 htab = ppc_hash_table (info);
11237 if (htab == NULL)
11238 return FALSE;
11239
11240 if (stub_entry->h != NULL
11241 && stub_entry->h->save_res
11242 && stub_entry->h->elf.root.type == bfd_link_hash_defined
11243 && stub_entry->h->elf.root.u.def.section == htab->sfpr)
11244 {
11245 /* Don't make stubs to out-of-line register save/restore
11246 functions. Instead, emit copies of the functions. */
11247 stub_entry->group->needs_save_res = 1;
11248 stub_entry->stub_type = ppc_stub_save_res;
11249 return TRUE;
11250 }
11251
11252 if (stub_entry->stub_type == ppc_stub_plt_call
11253 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
11254 {
11255 asection *plt;
11256 off = stub_entry->plt_ent->plt.offset & ~(bfd_vma) 1;
11257 if (off >= (bfd_vma) -2)
11258 abort ();
11259 plt = htab->elf.splt;
11260 if (!htab->elf.dynamic_sections_created
11261 || stub_entry->h == NULL
11262 || stub_entry->h->elf.dynindx == -1)
11263 plt = htab->elf.iplt;
11264 off += (plt->output_offset
11265 + plt->output_section->vma
11266 - elf_gp (plt->output_section->owner)
11267 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11268
11269 size = plt_stub_size (htab, stub_entry, off);
11270 if (htab->params->plt_stub_align)
11271 size += plt_stub_pad (htab, stub_entry, off);
11272 if (info->emitrelocations)
11273 {
11274 stub_entry->group->stub_sec->reloc_count
11275 += ((PPC_HA (off) != 0)
11276 + (htab->opd_abi
11277 ? 2 + (htab->params->plt_static_chain
11278 && PPC_HA (off + 16) == PPC_HA (off))
11279 : 1));
11280 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11281 }
11282 }
11283 else
11284 {
11285 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
11286 variants. */
11287 bfd_vma r2off = 0;
11288 bfd_vma local_off = 0;
11289
11290 off = (stub_entry->target_value
11291 + stub_entry->target_section->output_offset
11292 + stub_entry->target_section->output_section->vma);
11293 off -= (stub_entry->group->stub_sec->size
11294 + stub_entry->group->stub_sec->output_offset
11295 + stub_entry->group->stub_sec->output_section->vma);
11296
11297 /* Reset the stub type from the plt variant in case we now
11298 can reach with a shorter stub. */
11299 if (stub_entry->stub_type >= ppc_stub_plt_branch)
11300 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
11301
11302 size = 4;
11303 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
11304 {
11305 r2off = get_r2off (info, stub_entry);
11306 if (r2off == (bfd_vma) -1)
11307 {
11308 htab->stub_error = TRUE;
11309 return FALSE;
11310 }
11311 size = 8;
11312 if (PPC_HA (r2off) != 0)
11313 size += 4;
11314 if (PPC_LO (r2off) != 0)
11315 size += 4;
11316 off -= size - 4;
11317 }
11318
11319 local_off = PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
11320
11321 /* If the branch offset if too big, use a ppc_stub_plt_branch.
11322 Do the same for -R objects without function descriptors. */
11323 if (off + (1 << 25) >= (bfd_vma) (1 << 26) - local_off
11324 || (stub_entry->stub_type == ppc_stub_long_branch_r2off
11325 && r2off == 0
11326 && htab->sec_info[stub_entry->target_section->id].toc_off == 0))
11327 {
11328 struct ppc_branch_hash_entry *br_entry;
11329
11330 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
11331 stub_entry->root.string + 9,
11332 TRUE, FALSE);
11333 if (br_entry == NULL)
11334 {
11335 info->callbacks->einfo (_("%P: can't build branch stub `%s'\n"),
11336 stub_entry->root.string);
11337 htab->stub_error = TRUE;
11338 return FALSE;
11339 }
11340
11341 if (br_entry->iter != htab->stub_iteration)
11342 {
11343 br_entry->iter = htab->stub_iteration;
11344 br_entry->offset = htab->brlt->size;
11345 htab->brlt->size += 8;
11346
11347 if (htab->relbrlt != NULL)
11348 htab->relbrlt->size += sizeof (Elf64_External_Rela);
11349 else if (info->emitrelocations)
11350 {
11351 htab->brlt->reloc_count += 1;
11352 htab->brlt->flags |= SEC_RELOC;
11353 }
11354 }
11355
11356 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
11357 off = (br_entry->offset
11358 + htab->brlt->output_offset
11359 + htab->brlt->output_section->vma
11360 - elf_gp (htab->brlt->output_section->owner)
11361 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11362
11363 if (info->emitrelocations)
11364 {
11365 stub_entry->group->stub_sec->reloc_count
11366 += 1 + (PPC_HA (off) != 0);
11367 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11368 }
11369
11370 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
11371 {
11372 size = 12;
11373 if (PPC_HA (off) != 0)
11374 size = 16;
11375 }
11376 else
11377 {
11378 size = 16;
11379 if (PPC_HA (off) != 0)
11380 size += 4;
11381
11382 if (PPC_HA (r2off) != 0)
11383 size += 4;
11384 if (PPC_LO (r2off) != 0)
11385 size += 4;
11386 }
11387 }
11388 else if (info->emitrelocations)
11389 {
11390 stub_entry->group->stub_sec->reloc_count += 1;
11391 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11392 }
11393 }
11394
11395 stub_entry->group->stub_sec->size += size;
11396 return TRUE;
11397 }
11398
11399 /* Set up various things so that we can make a list of input sections
11400 for each output section included in the link. Returns -1 on error,
11401 0 when no stubs will be needed, and 1 on success. */
11402
11403 int
11404 ppc64_elf_setup_section_lists (struct bfd_link_info *info)
11405 {
11406 unsigned int id;
11407 bfd_size_type amt;
11408 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11409
11410 if (htab == NULL)
11411 return -1;
11412
11413 htab->sec_info_arr_size = bfd_get_next_section_id ();
11414 amt = sizeof (*htab->sec_info) * (htab->sec_info_arr_size);
11415 htab->sec_info = bfd_zmalloc (amt);
11416 if (htab->sec_info == NULL)
11417 return -1;
11418
11419 /* Set toc_off for com, und, abs and ind sections. */
11420 for (id = 0; id < 3; id++)
11421 htab->sec_info[id].toc_off = TOC_BASE_OFF;
11422
11423 return 1;
11424 }
11425
11426 /* Set up for first pass at multitoc partitioning. */
11427
11428 void
11429 ppc64_elf_start_multitoc_partition (struct bfd_link_info *info)
11430 {
11431 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11432
11433 htab->toc_curr = ppc64_elf_set_toc (info, info->output_bfd);
11434 htab->toc_bfd = NULL;
11435 htab->toc_first_sec = NULL;
11436 }
11437
11438 /* The linker repeatedly calls this function for each TOC input section
11439 and linker generated GOT section. Group input bfds such that the toc
11440 within a group is less than 64k in size. */
11441
11442 bfd_boolean
11443 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
11444 {
11445 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11446 bfd_vma addr, off, limit;
11447
11448 if (htab == NULL)
11449 return FALSE;
11450
11451 if (!htab->second_toc_pass)
11452 {
11453 /* Keep track of the first .toc or .got section for this input bfd. */
11454 bfd_boolean new_bfd = htab->toc_bfd != isec->owner;
11455
11456 if (new_bfd)
11457 {
11458 htab->toc_bfd = isec->owner;
11459 htab->toc_first_sec = isec;
11460 }
11461
11462 addr = isec->output_offset + isec->output_section->vma;
11463 off = addr - htab->toc_curr;
11464 limit = 0x80008000;
11465 if (ppc64_elf_tdata (isec->owner)->has_small_toc_reloc)
11466 limit = 0x10000;
11467 if (off + isec->size > limit)
11468 {
11469 addr = (htab->toc_first_sec->output_offset
11470 + htab->toc_first_sec->output_section->vma);
11471 htab->toc_curr = addr;
11472 htab->toc_curr &= -TOC_BASE_ALIGN;
11473 }
11474
11475 /* toc_curr is the base address of this toc group. Set elf_gp
11476 for the input section to be the offset relative to the
11477 output toc base plus 0x8000. Making the input elf_gp an
11478 offset allows us to move the toc as a whole without
11479 recalculating input elf_gp. */
11480 off = htab->toc_curr - elf_gp (isec->output_section->owner);
11481 off += TOC_BASE_OFF;
11482
11483 /* Die if someone uses a linker script that doesn't keep input
11484 file .toc and .got together. */
11485 if (new_bfd
11486 && elf_gp (isec->owner) != 0
11487 && elf_gp (isec->owner) != off)
11488 return FALSE;
11489
11490 elf_gp (isec->owner) = off;
11491 return TRUE;
11492 }
11493
11494 /* During the second pass toc_first_sec points to the start of
11495 a toc group, and toc_curr is used to track the old elf_gp.
11496 We use toc_bfd to ensure we only look at each bfd once. */
11497 if (htab->toc_bfd == isec->owner)
11498 return TRUE;
11499 htab->toc_bfd = isec->owner;
11500
11501 if (htab->toc_first_sec == NULL
11502 || htab->toc_curr != elf_gp (isec->owner))
11503 {
11504 htab->toc_curr = elf_gp (isec->owner);
11505 htab->toc_first_sec = isec;
11506 }
11507 addr = (htab->toc_first_sec->output_offset
11508 + htab->toc_first_sec->output_section->vma);
11509 off = addr - elf_gp (isec->output_section->owner) + TOC_BASE_OFF;
11510 elf_gp (isec->owner) = off;
11511
11512 return TRUE;
11513 }
11514
11515 /* Called via elf_link_hash_traverse to merge GOT entries for global
11516 symbol H. */
11517
11518 static bfd_boolean
11519 merge_global_got (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
11520 {
11521 if (h->root.type == bfd_link_hash_indirect)
11522 return TRUE;
11523
11524 merge_got_entries (&h->got.glist);
11525
11526 return TRUE;
11527 }
11528
11529 /* Called via elf_link_hash_traverse to allocate GOT entries for global
11530 symbol H. */
11531
11532 static bfd_boolean
11533 reallocate_got (struct elf_link_hash_entry *h, void *inf)
11534 {
11535 struct got_entry *gent;
11536
11537 if (h->root.type == bfd_link_hash_indirect)
11538 return TRUE;
11539
11540 for (gent = h->got.glist; gent != NULL; gent = gent->next)
11541 if (!gent->is_indirect)
11542 allocate_got (h, (struct bfd_link_info *) inf, gent);
11543 return TRUE;
11544 }
11545
11546 /* Called on the first multitoc pass after the last call to
11547 ppc64_elf_next_toc_section. This function removes duplicate GOT
11548 entries. */
11549
11550 bfd_boolean
11551 ppc64_elf_layout_multitoc (struct bfd_link_info *info)
11552 {
11553 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11554 struct bfd *ibfd, *ibfd2;
11555 bfd_boolean done_something;
11556
11557 htab->multi_toc_needed = htab->toc_curr != elf_gp (info->output_bfd);
11558
11559 if (!htab->do_multi_toc)
11560 return FALSE;
11561
11562 /* Merge global sym got entries within a toc group. */
11563 elf_link_hash_traverse (&htab->elf, merge_global_got, info);
11564
11565 /* And tlsld_got. */
11566 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11567 {
11568 struct got_entry *ent, *ent2;
11569
11570 if (!is_ppc64_elf (ibfd))
11571 continue;
11572
11573 ent = ppc64_tlsld_got (ibfd);
11574 if (!ent->is_indirect
11575 && ent->got.offset != (bfd_vma) -1)
11576 {
11577 for (ibfd2 = ibfd->link.next; ibfd2 != NULL; ibfd2 = ibfd2->link.next)
11578 {
11579 if (!is_ppc64_elf (ibfd2))
11580 continue;
11581
11582 ent2 = ppc64_tlsld_got (ibfd2);
11583 if (!ent2->is_indirect
11584 && ent2->got.offset != (bfd_vma) -1
11585 && elf_gp (ibfd2) == elf_gp (ibfd))
11586 {
11587 ent2->is_indirect = TRUE;
11588 ent2->got.ent = ent;
11589 }
11590 }
11591 }
11592 }
11593
11594 /* Zap sizes of got sections. */
11595 htab->elf.irelplt->rawsize = htab->elf.irelplt->size;
11596 htab->elf.irelplt->size -= htab->got_reli_size;
11597 htab->got_reli_size = 0;
11598
11599 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11600 {
11601 asection *got, *relgot;
11602
11603 if (!is_ppc64_elf (ibfd))
11604 continue;
11605
11606 got = ppc64_elf_tdata (ibfd)->got;
11607 if (got != NULL)
11608 {
11609 got->rawsize = got->size;
11610 got->size = 0;
11611 relgot = ppc64_elf_tdata (ibfd)->relgot;
11612 relgot->rawsize = relgot->size;
11613 relgot->size = 0;
11614 }
11615 }
11616
11617 /* Now reallocate the got, local syms first. We don't need to
11618 allocate section contents again since we never increase size. */
11619 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11620 {
11621 struct got_entry **lgot_ents;
11622 struct got_entry **end_lgot_ents;
11623 struct plt_entry **local_plt;
11624 struct plt_entry **end_local_plt;
11625 unsigned char *lgot_masks;
11626 bfd_size_type locsymcount;
11627 Elf_Internal_Shdr *symtab_hdr;
11628 asection *s;
11629
11630 if (!is_ppc64_elf (ibfd))
11631 continue;
11632
11633 lgot_ents = elf_local_got_ents (ibfd);
11634 if (!lgot_ents)
11635 continue;
11636
11637 symtab_hdr = &elf_symtab_hdr (ibfd);
11638 locsymcount = symtab_hdr->sh_info;
11639 end_lgot_ents = lgot_ents + locsymcount;
11640 local_plt = (struct plt_entry **) end_lgot_ents;
11641 end_local_plt = local_plt + locsymcount;
11642 lgot_masks = (unsigned char *) end_local_plt;
11643 s = ppc64_elf_tdata (ibfd)->got;
11644 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
11645 {
11646 struct got_entry *ent;
11647
11648 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
11649 {
11650 unsigned int ent_size = 8;
11651 unsigned int rel_size = sizeof (Elf64_External_Rela);
11652
11653 ent->got.offset = s->size;
11654 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
11655 {
11656 ent_size *= 2;
11657 rel_size *= 2;
11658 }
11659 s->size += ent_size;
11660 if ((*lgot_masks & PLT_IFUNC) != 0)
11661 {
11662 htab->elf.irelplt->size += rel_size;
11663 htab->got_reli_size += rel_size;
11664 }
11665 else if (bfd_link_pic (info))
11666 {
11667 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
11668 srel->size += rel_size;
11669 }
11670 }
11671 }
11672 }
11673
11674 elf_link_hash_traverse (&htab->elf, reallocate_got, info);
11675
11676 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11677 {
11678 struct got_entry *ent;
11679
11680 if (!is_ppc64_elf (ibfd))
11681 continue;
11682
11683 ent = ppc64_tlsld_got (ibfd);
11684 if (!ent->is_indirect
11685 && ent->got.offset != (bfd_vma) -1)
11686 {
11687 asection *s = ppc64_elf_tdata (ibfd)->got;
11688 ent->got.offset = s->size;
11689 s->size += 16;
11690 if (bfd_link_pic (info))
11691 {
11692 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
11693 srel->size += sizeof (Elf64_External_Rela);
11694 }
11695 }
11696 }
11697
11698 done_something = htab->elf.irelplt->rawsize != htab->elf.irelplt->size;
11699 if (!done_something)
11700 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11701 {
11702 asection *got;
11703
11704 if (!is_ppc64_elf (ibfd))
11705 continue;
11706
11707 got = ppc64_elf_tdata (ibfd)->got;
11708 if (got != NULL)
11709 {
11710 done_something = got->rawsize != got->size;
11711 if (done_something)
11712 break;
11713 }
11714 }
11715
11716 if (done_something)
11717 (*htab->params->layout_sections_again) ();
11718
11719 /* Set up for second pass over toc sections to recalculate elf_gp
11720 on input sections. */
11721 htab->toc_bfd = NULL;
11722 htab->toc_first_sec = NULL;
11723 htab->second_toc_pass = TRUE;
11724 return done_something;
11725 }
11726
11727 /* Called after second pass of multitoc partitioning. */
11728
11729 void
11730 ppc64_elf_finish_multitoc_partition (struct bfd_link_info *info)
11731 {
11732 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11733
11734 /* After the second pass, toc_curr tracks the TOC offset used
11735 for code sections below in ppc64_elf_next_input_section. */
11736 htab->toc_curr = TOC_BASE_OFF;
11737 }
11738
11739 /* No toc references were found in ISEC. If the code in ISEC makes no
11740 calls, then there's no need to use toc adjusting stubs when branching
11741 into ISEC. Actually, indirect calls from ISEC are OK as they will
11742 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
11743 needed, and 2 if a cyclical call-graph was found but no other reason
11744 for a stub was detected. If called from the top level, a return of
11745 2 means the same as a return of 0. */
11746
11747 static int
11748 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
11749 {
11750 int ret;
11751
11752 /* Mark this section as checked. */
11753 isec->call_check_done = 1;
11754
11755 /* We know none of our code bearing sections will need toc stubs. */
11756 if ((isec->flags & SEC_LINKER_CREATED) != 0)
11757 return 0;
11758
11759 if (isec->size == 0)
11760 return 0;
11761
11762 if (isec->output_section == NULL)
11763 return 0;
11764
11765 ret = 0;
11766 if (isec->reloc_count != 0)
11767 {
11768 Elf_Internal_Rela *relstart, *rel;
11769 Elf_Internal_Sym *local_syms;
11770 struct ppc_link_hash_table *htab;
11771
11772 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
11773 info->keep_memory);
11774 if (relstart == NULL)
11775 return -1;
11776
11777 /* Look for branches to outside of this section. */
11778 local_syms = NULL;
11779 htab = ppc_hash_table (info);
11780 if (htab == NULL)
11781 return -1;
11782
11783 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
11784 {
11785 enum elf_ppc64_reloc_type r_type;
11786 unsigned long r_symndx;
11787 struct elf_link_hash_entry *h;
11788 struct ppc_link_hash_entry *eh;
11789 Elf_Internal_Sym *sym;
11790 asection *sym_sec;
11791 struct _opd_sec_data *opd;
11792 bfd_vma sym_value;
11793 bfd_vma dest;
11794
11795 r_type = ELF64_R_TYPE (rel->r_info);
11796 if (r_type != R_PPC64_REL24
11797 && r_type != R_PPC64_REL14
11798 && r_type != R_PPC64_REL14_BRTAKEN
11799 && r_type != R_PPC64_REL14_BRNTAKEN)
11800 continue;
11801
11802 r_symndx = ELF64_R_SYM (rel->r_info);
11803 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
11804 isec->owner))
11805 {
11806 ret = -1;
11807 break;
11808 }
11809
11810 /* Calls to dynamic lib functions go through a plt call stub
11811 that uses r2. */
11812 eh = (struct ppc_link_hash_entry *) h;
11813 if (eh != NULL
11814 && (eh->elf.plt.plist != NULL
11815 || (eh->oh != NULL
11816 && ppc_follow_link (eh->oh)->elf.plt.plist != NULL)))
11817 {
11818 ret = 1;
11819 break;
11820 }
11821
11822 if (sym_sec == NULL)
11823 /* Ignore other undefined symbols. */
11824 continue;
11825
11826 /* Assume branches to other sections not included in the
11827 link need stubs too, to cover -R and absolute syms. */
11828 if (sym_sec->output_section == NULL)
11829 {
11830 ret = 1;
11831 break;
11832 }
11833
11834 if (h == NULL)
11835 sym_value = sym->st_value;
11836 else
11837 {
11838 if (h->root.type != bfd_link_hash_defined
11839 && h->root.type != bfd_link_hash_defweak)
11840 abort ();
11841 sym_value = h->root.u.def.value;
11842 }
11843 sym_value += rel->r_addend;
11844
11845 /* If this branch reloc uses an opd sym, find the code section. */
11846 opd = get_opd_info (sym_sec);
11847 if (opd != NULL)
11848 {
11849 if (h == NULL && opd->adjust != NULL)
11850 {
11851 long adjust;
11852
11853 adjust = opd->adjust[OPD_NDX (sym_value)];
11854 if (adjust == -1)
11855 /* Assume deleted functions won't ever be called. */
11856 continue;
11857 sym_value += adjust;
11858 }
11859
11860 dest = opd_entry_value (sym_sec, sym_value,
11861 &sym_sec, NULL, FALSE);
11862 if (dest == (bfd_vma) -1)
11863 continue;
11864 }
11865 else
11866 dest = (sym_value
11867 + sym_sec->output_offset
11868 + sym_sec->output_section->vma);
11869
11870 /* Ignore branch to self. */
11871 if (sym_sec == isec)
11872 continue;
11873
11874 /* If the called function uses the toc, we need a stub. */
11875 if (sym_sec->has_toc_reloc
11876 || sym_sec->makes_toc_func_call)
11877 {
11878 ret = 1;
11879 break;
11880 }
11881
11882 /* Assume any branch that needs a long branch stub might in fact
11883 need a plt_branch stub. A plt_branch stub uses r2. */
11884 else if (dest - (isec->output_offset
11885 + isec->output_section->vma
11886 + rel->r_offset) + (1 << 25)
11887 >= (2u << 25) - PPC64_LOCAL_ENTRY_OFFSET (h
11888 ? h->other
11889 : sym->st_other))
11890 {
11891 ret = 1;
11892 break;
11893 }
11894
11895 /* If calling back to a section in the process of being
11896 tested, we can't say for sure that no toc adjusting stubs
11897 are needed, so don't return zero. */
11898 else if (sym_sec->call_check_in_progress)
11899 ret = 2;
11900
11901 /* Branches to another section that itself doesn't have any TOC
11902 references are OK. Recursively call ourselves to check. */
11903 else if (!sym_sec->call_check_done)
11904 {
11905 int recur;
11906
11907 /* Mark current section as indeterminate, so that other
11908 sections that call back to current won't be marked as
11909 known. */
11910 isec->call_check_in_progress = 1;
11911 recur = toc_adjusting_stub_needed (info, sym_sec);
11912 isec->call_check_in_progress = 0;
11913
11914 if (recur != 0)
11915 {
11916 ret = recur;
11917 if (recur != 2)
11918 break;
11919 }
11920 }
11921 }
11922
11923 if (local_syms != NULL
11924 && (elf_symtab_hdr (isec->owner).contents
11925 != (unsigned char *) local_syms))
11926 free (local_syms);
11927 if (elf_section_data (isec)->relocs != relstart)
11928 free (relstart);
11929 }
11930
11931 if ((ret & 1) == 0
11932 && isec->map_head.s != NULL
11933 && (strcmp (isec->output_section->name, ".init") == 0
11934 || strcmp (isec->output_section->name, ".fini") == 0))
11935 {
11936 if (isec->map_head.s->has_toc_reloc
11937 || isec->map_head.s->makes_toc_func_call)
11938 ret = 1;
11939 else if (!isec->map_head.s->call_check_done)
11940 {
11941 int recur;
11942 isec->call_check_in_progress = 1;
11943 recur = toc_adjusting_stub_needed (info, isec->map_head.s);
11944 isec->call_check_in_progress = 0;
11945 if (recur != 0)
11946 ret = recur;
11947 }
11948 }
11949
11950 if (ret == 1)
11951 isec->makes_toc_func_call = 1;
11952
11953 return ret;
11954 }
11955
11956 /* The linker repeatedly calls this function for each input section,
11957 in the order that input sections are linked into output sections.
11958 Build lists of input sections to determine groupings between which
11959 we may insert linker stubs. */
11960
11961 bfd_boolean
11962 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
11963 {
11964 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11965
11966 if (htab == NULL)
11967 return FALSE;
11968
11969 if ((isec->output_section->flags & SEC_CODE) != 0
11970 && isec->output_section->id < htab->sec_info_arr_size)
11971 {
11972 /* This happens to make the list in reverse order,
11973 which is what we want. */
11974 htab->sec_info[isec->id].u.list
11975 = htab->sec_info[isec->output_section->id].u.list;
11976 htab->sec_info[isec->output_section->id].u.list = isec;
11977 }
11978
11979 if (htab->multi_toc_needed)
11980 {
11981 /* Analyse sections that aren't already flagged as needing a
11982 valid toc pointer. Exclude .fixup for the linux kernel.
11983 .fixup contains branches, but only back to the function that
11984 hit an exception. */
11985 if (!(isec->has_toc_reloc
11986 || (isec->flags & SEC_CODE) == 0
11987 || strcmp (isec->name, ".fixup") == 0
11988 || isec->call_check_done))
11989 {
11990 if (toc_adjusting_stub_needed (info, isec) < 0)
11991 return FALSE;
11992 }
11993 /* Make all sections use the TOC assigned for this object file.
11994 This will be wrong for pasted sections; We fix that in
11995 check_pasted_section(). */
11996 if (elf_gp (isec->owner) != 0)
11997 htab->toc_curr = elf_gp (isec->owner);
11998 }
11999
12000 htab->sec_info[isec->id].toc_off = htab->toc_curr;
12001 return TRUE;
12002 }
12003
12004 /* Check that all .init and .fini sections use the same toc, if they
12005 have toc relocs. */
12006
12007 static bfd_boolean
12008 check_pasted_section (struct bfd_link_info *info, const char *name)
12009 {
12010 asection *o = bfd_get_section_by_name (info->output_bfd, name);
12011
12012 if (o != NULL)
12013 {
12014 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12015 bfd_vma toc_off = 0;
12016 asection *i;
12017
12018 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
12019 if (i->has_toc_reloc)
12020 {
12021 if (toc_off == 0)
12022 toc_off = htab->sec_info[i->id].toc_off;
12023 else if (toc_off != htab->sec_info[i->id].toc_off)
12024 return FALSE;
12025 }
12026
12027 if (toc_off == 0)
12028 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
12029 if (i->makes_toc_func_call)
12030 {
12031 toc_off = htab->sec_info[i->id].toc_off;
12032 break;
12033 }
12034
12035 /* Make sure the whole pasted function uses the same toc offset. */
12036 if (toc_off != 0)
12037 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
12038 htab->sec_info[i->id].toc_off = toc_off;
12039 }
12040 return TRUE;
12041 }
12042
12043 bfd_boolean
12044 ppc64_elf_check_init_fini (struct bfd_link_info *info)
12045 {
12046 return (check_pasted_section (info, ".init")
12047 & check_pasted_section (info, ".fini"));
12048 }
12049
12050 /* See whether we can group stub sections together. Grouping stub
12051 sections may result in fewer stubs. More importantly, we need to
12052 put all .init* and .fini* stubs at the beginning of the .init or
12053 .fini output sections respectively, because glibc splits the
12054 _init and _fini functions into multiple parts. Putting a stub in
12055 the middle of a function is not a good idea. */
12056
12057 static bfd_boolean
12058 group_sections (struct bfd_link_info *info,
12059 bfd_size_type stub_group_size,
12060 bfd_boolean stubs_always_before_branch)
12061 {
12062 struct ppc_link_hash_table *htab;
12063 asection *osec;
12064 bfd_boolean suppress_size_errors;
12065
12066 htab = ppc_hash_table (info);
12067 if (htab == NULL)
12068 return FALSE;
12069
12070 suppress_size_errors = FALSE;
12071 if (stub_group_size == 1)
12072 {
12073 /* Default values. */
12074 if (stubs_always_before_branch)
12075 stub_group_size = 0x1e00000;
12076 else
12077 stub_group_size = 0x1c00000;
12078 suppress_size_errors = TRUE;
12079 }
12080
12081 for (osec = info->output_bfd->sections; osec != NULL; osec = osec->next)
12082 {
12083 asection *tail;
12084
12085 if (osec->id >= htab->sec_info_arr_size)
12086 continue;
12087
12088 tail = htab->sec_info[osec->id].u.list;
12089 while (tail != NULL)
12090 {
12091 asection *curr;
12092 asection *prev;
12093 bfd_size_type total;
12094 bfd_boolean big_sec;
12095 bfd_vma curr_toc;
12096 struct map_stub *group;
12097 bfd_size_type group_size;
12098
12099 curr = tail;
12100 total = tail->size;
12101 group_size = (ppc64_elf_section_data (tail) != NULL
12102 && ppc64_elf_section_data (tail)->has_14bit_branch
12103 ? stub_group_size >> 10 : stub_group_size);
12104
12105 big_sec = total > group_size;
12106 if (big_sec && !suppress_size_errors)
12107 _bfd_error_handler (_("%B section %A exceeds stub group size"),
12108 tail->owner, tail);
12109 curr_toc = htab->sec_info[tail->id].toc_off;
12110
12111 while ((prev = htab->sec_info[curr->id].u.list) != NULL
12112 && ((total += curr->output_offset - prev->output_offset)
12113 < (ppc64_elf_section_data (prev) != NULL
12114 && ppc64_elf_section_data (prev)->has_14bit_branch
12115 ? (group_size = stub_group_size >> 10) : group_size))
12116 && htab->sec_info[prev->id].toc_off == curr_toc)
12117 curr = prev;
12118
12119 /* OK, the size from the start of CURR to the end is less
12120 than group_size and thus can be handled by one stub
12121 section. (or the tail section is itself larger than
12122 group_size, in which case we may be toast.) We should
12123 really be keeping track of the total size of stubs added
12124 here, as stubs contribute to the final output section
12125 size. That's a little tricky, and this way will only
12126 break if stubs added make the total size more than 2^25,
12127 ie. for the default stub_group_size, if stubs total more
12128 than 2097152 bytes, or nearly 75000 plt call stubs. */
12129 group = bfd_alloc (curr->owner, sizeof (*group));
12130 if (group == NULL)
12131 return FALSE;
12132 group->link_sec = curr;
12133 group->stub_sec = NULL;
12134 group->needs_save_res = 0;
12135 group->next = htab->group;
12136 htab->group = group;
12137 do
12138 {
12139 prev = htab->sec_info[tail->id].u.list;
12140 /* Set up this stub group. */
12141 htab->sec_info[tail->id].u.group = group;
12142 }
12143 while (tail != curr && (tail = prev) != NULL);
12144
12145 /* But wait, there's more! Input sections up to group_size
12146 bytes before the stub section can be handled by it too.
12147 Don't do this if we have a really large section after the
12148 stubs, as adding more stubs increases the chance that
12149 branches may not reach into the stub section. */
12150 if (!stubs_always_before_branch && !big_sec)
12151 {
12152 total = 0;
12153 while (prev != NULL
12154 && ((total += tail->output_offset - prev->output_offset)
12155 < (ppc64_elf_section_data (prev) != NULL
12156 && ppc64_elf_section_data (prev)->has_14bit_branch
12157 ? (group_size = stub_group_size >> 10) : group_size))
12158 && htab->sec_info[prev->id].toc_off == curr_toc)
12159 {
12160 tail = prev;
12161 prev = htab->sec_info[tail->id].u.list;
12162 htab->sec_info[tail->id].u.group = group;
12163 }
12164 }
12165 tail = prev;
12166 }
12167 }
12168 return TRUE;
12169 }
12170
12171 static const unsigned char glink_eh_frame_cie[] =
12172 {
12173 0, 0, 0, 16, /* length. */
12174 0, 0, 0, 0, /* id. */
12175 1, /* CIE version. */
12176 'z', 'R', 0, /* Augmentation string. */
12177 4, /* Code alignment. */
12178 0x78, /* Data alignment. */
12179 65, /* RA reg. */
12180 1, /* Augmentation size. */
12181 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
12182 DW_CFA_def_cfa, 1, 0, /* def_cfa: r1 offset 0. */
12183 0, 0, 0, 0
12184 };
12185
12186 /* Stripping output sections is normally done before dynamic section
12187 symbols have been allocated. This function is called later, and
12188 handles cases like htab->brlt which is mapped to its own output
12189 section. */
12190
12191 static void
12192 maybe_strip_output (struct bfd_link_info *info, asection *isec)
12193 {
12194 if (isec->size == 0
12195 && isec->output_section->size == 0
12196 && !(isec->output_section->flags & SEC_KEEP)
12197 && !bfd_section_removed_from_list (info->output_bfd,
12198 isec->output_section)
12199 && elf_section_data (isec->output_section)->dynindx == 0)
12200 {
12201 isec->output_section->flags |= SEC_EXCLUDE;
12202 bfd_section_list_remove (info->output_bfd, isec->output_section);
12203 info->output_bfd->section_count--;
12204 }
12205 }
12206
12207 /* Determine and set the size of the stub section for a final link.
12208
12209 The basic idea here is to examine all the relocations looking for
12210 PC-relative calls to a target that is unreachable with a "bl"
12211 instruction. */
12212
12213 bfd_boolean
12214 ppc64_elf_size_stubs (struct bfd_link_info *info)
12215 {
12216 bfd_size_type stub_group_size;
12217 bfd_boolean stubs_always_before_branch;
12218 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12219
12220 if (htab == NULL)
12221 return FALSE;
12222
12223 if (htab->params->plt_thread_safe == -1 && !bfd_link_executable (info))
12224 htab->params->plt_thread_safe = 1;
12225 if (!htab->opd_abi)
12226 htab->params->plt_thread_safe = 0;
12227 else if (htab->params->plt_thread_safe == -1)
12228 {
12229 static const char *const thread_starter[] =
12230 {
12231 "pthread_create",
12232 /* libstdc++ */
12233 "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE",
12234 /* librt */
12235 "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio",
12236 "mq_notify", "create_timer",
12237 /* libanl */
12238 "getaddrinfo_a",
12239 /* libgomp */
12240 "GOMP_parallel",
12241 "GOMP_parallel_start",
12242 "GOMP_parallel_loop_static",
12243 "GOMP_parallel_loop_static_start",
12244 "GOMP_parallel_loop_dynamic",
12245 "GOMP_parallel_loop_dynamic_start",
12246 "GOMP_parallel_loop_guided",
12247 "GOMP_parallel_loop_guided_start",
12248 "GOMP_parallel_loop_runtime",
12249 "GOMP_parallel_loop_runtime_start",
12250 "GOMP_parallel_sections",
12251 "GOMP_parallel_sections_start",
12252 /* libgo */
12253 "__go_go",
12254 };
12255 unsigned i;
12256
12257 for (i = 0; i < ARRAY_SIZE (thread_starter); i++)
12258 {
12259 struct elf_link_hash_entry *h;
12260 h = elf_link_hash_lookup (&htab->elf, thread_starter[i],
12261 FALSE, FALSE, TRUE);
12262 htab->params->plt_thread_safe = h != NULL && h->ref_regular;
12263 if (htab->params->plt_thread_safe)
12264 break;
12265 }
12266 }
12267 stubs_always_before_branch = htab->params->group_size < 0;
12268 if (htab->params->group_size < 0)
12269 stub_group_size = -htab->params->group_size;
12270 else
12271 stub_group_size = htab->params->group_size;
12272
12273 if (!group_sections (info, stub_group_size, stubs_always_before_branch))
12274 return FALSE;
12275
12276 #define STUB_SHRINK_ITER 20
12277 /* Loop until no stubs added. After iteration 20 of this loop we may
12278 exit on a stub section shrinking. This is to break out of a
12279 pathological case where adding stubs on one iteration decreases
12280 section gaps (perhaps due to alignment), which then requires
12281 fewer or smaller stubs on the next iteration. */
12282
12283 while (1)
12284 {
12285 bfd *input_bfd;
12286 unsigned int bfd_indx;
12287 struct map_stub *group;
12288 asection *stub_sec;
12289
12290 htab->stub_iteration += 1;
12291
12292 for (input_bfd = info->input_bfds, bfd_indx = 0;
12293 input_bfd != NULL;
12294 input_bfd = input_bfd->link.next, bfd_indx++)
12295 {
12296 Elf_Internal_Shdr *symtab_hdr;
12297 asection *section;
12298 Elf_Internal_Sym *local_syms = NULL;
12299
12300 if (!is_ppc64_elf (input_bfd))
12301 continue;
12302
12303 /* We'll need the symbol table in a second. */
12304 symtab_hdr = &elf_symtab_hdr (input_bfd);
12305 if (symtab_hdr->sh_info == 0)
12306 continue;
12307
12308 /* Walk over each section attached to the input bfd. */
12309 for (section = input_bfd->sections;
12310 section != NULL;
12311 section = section->next)
12312 {
12313 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
12314
12315 /* If there aren't any relocs, then there's nothing more
12316 to do. */
12317 if ((section->flags & SEC_RELOC) == 0
12318 || (section->flags & SEC_ALLOC) == 0
12319 || (section->flags & SEC_LOAD) == 0
12320 || (section->flags & SEC_CODE) == 0
12321 || section->reloc_count == 0)
12322 continue;
12323
12324 /* If this section is a link-once section that will be
12325 discarded, then don't create any stubs. */
12326 if (section->output_section == NULL
12327 || section->output_section->owner != info->output_bfd)
12328 continue;
12329
12330 /* Get the relocs. */
12331 internal_relocs
12332 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
12333 info->keep_memory);
12334 if (internal_relocs == NULL)
12335 goto error_ret_free_local;
12336
12337 /* Now examine each relocation. */
12338 irela = internal_relocs;
12339 irelaend = irela + section->reloc_count;
12340 for (; irela < irelaend; irela++)
12341 {
12342 enum elf_ppc64_reloc_type r_type;
12343 unsigned int r_indx;
12344 enum ppc_stub_type stub_type;
12345 struct ppc_stub_hash_entry *stub_entry;
12346 asection *sym_sec, *code_sec;
12347 bfd_vma sym_value, code_value;
12348 bfd_vma destination;
12349 unsigned long local_off;
12350 bfd_boolean ok_dest;
12351 struct ppc_link_hash_entry *hash;
12352 struct ppc_link_hash_entry *fdh;
12353 struct elf_link_hash_entry *h;
12354 Elf_Internal_Sym *sym;
12355 char *stub_name;
12356 const asection *id_sec;
12357 struct _opd_sec_data *opd;
12358 struct plt_entry *plt_ent;
12359
12360 r_type = ELF64_R_TYPE (irela->r_info);
12361 r_indx = ELF64_R_SYM (irela->r_info);
12362
12363 if (r_type >= R_PPC64_max)
12364 {
12365 bfd_set_error (bfd_error_bad_value);
12366 goto error_ret_free_internal;
12367 }
12368
12369 /* Only look for stubs on branch instructions. */
12370 if (r_type != R_PPC64_REL24
12371 && r_type != R_PPC64_REL14
12372 && r_type != R_PPC64_REL14_BRTAKEN
12373 && r_type != R_PPC64_REL14_BRNTAKEN)
12374 continue;
12375
12376 /* Now determine the call target, its name, value,
12377 section. */
12378 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
12379 r_indx, input_bfd))
12380 goto error_ret_free_internal;
12381 hash = (struct ppc_link_hash_entry *) h;
12382
12383 ok_dest = FALSE;
12384 fdh = NULL;
12385 sym_value = 0;
12386 if (hash == NULL)
12387 {
12388 sym_value = sym->st_value;
12389 if (sym_sec != NULL
12390 && sym_sec->output_section != NULL)
12391 ok_dest = TRUE;
12392 }
12393 else if (hash->elf.root.type == bfd_link_hash_defined
12394 || hash->elf.root.type == bfd_link_hash_defweak)
12395 {
12396 sym_value = hash->elf.root.u.def.value;
12397 if (sym_sec->output_section != NULL)
12398 ok_dest = TRUE;
12399 }
12400 else if (hash->elf.root.type == bfd_link_hash_undefweak
12401 || hash->elf.root.type == bfd_link_hash_undefined)
12402 {
12403 /* Recognise an old ABI func code entry sym, and
12404 use the func descriptor sym instead if it is
12405 defined. */
12406 if (hash->elf.root.root.string[0] == '.'
12407 && (fdh = lookup_fdh (hash, htab)) != NULL)
12408 {
12409 if (fdh->elf.root.type == bfd_link_hash_defined
12410 || fdh->elf.root.type == bfd_link_hash_defweak)
12411 {
12412 sym_sec = fdh->elf.root.u.def.section;
12413 sym_value = fdh->elf.root.u.def.value;
12414 if (sym_sec->output_section != NULL)
12415 ok_dest = TRUE;
12416 }
12417 else
12418 fdh = NULL;
12419 }
12420 }
12421 else
12422 {
12423 bfd_set_error (bfd_error_bad_value);
12424 goto error_ret_free_internal;
12425 }
12426
12427 destination = 0;
12428 local_off = 0;
12429 if (ok_dest)
12430 {
12431 sym_value += irela->r_addend;
12432 destination = (sym_value
12433 + sym_sec->output_offset
12434 + sym_sec->output_section->vma);
12435 local_off = PPC64_LOCAL_ENTRY_OFFSET (hash
12436 ? hash->elf.other
12437 : sym->st_other);
12438 }
12439
12440 code_sec = sym_sec;
12441 code_value = sym_value;
12442 opd = get_opd_info (sym_sec);
12443 if (opd != NULL)
12444 {
12445 bfd_vma dest;
12446
12447 if (hash == NULL && opd->adjust != NULL)
12448 {
12449 long adjust = opd->adjust[OPD_NDX (sym_value)];
12450 if (adjust == -1)
12451 continue;
12452 code_value += adjust;
12453 sym_value += adjust;
12454 }
12455 dest = opd_entry_value (sym_sec, sym_value,
12456 &code_sec, &code_value, FALSE);
12457 if (dest != (bfd_vma) -1)
12458 {
12459 destination = dest;
12460 if (fdh != NULL)
12461 {
12462 /* Fixup old ABI sym to point at code
12463 entry. */
12464 hash->elf.root.type = bfd_link_hash_defweak;
12465 hash->elf.root.u.def.section = code_sec;
12466 hash->elf.root.u.def.value = code_value;
12467 }
12468 }
12469 }
12470
12471 /* Determine what (if any) linker stub is needed. */
12472 plt_ent = NULL;
12473 stub_type = ppc_type_of_stub (section, irela, &hash,
12474 &plt_ent, destination,
12475 local_off);
12476
12477 if (stub_type != ppc_stub_plt_call)
12478 {
12479 /* Check whether we need a TOC adjusting stub.
12480 Since the linker pastes together pieces from
12481 different object files when creating the
12482 _init and _fini functions, it may be that a
12483 call to what looks like a local sym is in
12484 fact a call needing a TOC adjustment. */
12485 if (code_sec != NULL
12486 && code_sec->output_section != NULL
12487 && (htab->sec_info[code_sec->id].toc_off
12488 != htab->sec_info[section->id].toc_off)
12489 && (code_sec->has_toc_reloc
12490 || code_sec->makes_toc_func_call))
12491 stub_type = ppc_stub_long_branch_r2off;
12492 }
12493
12494 if (stub_type == ppc_stub_none)
12495 continue;
12496
12497 /* __tls_get_addr calls might be eliminated. */
12498 if (stub_type != ppc_stub_plt_call
12499 && hash != NULL
12500 && (hash == htab->tls_get_addr
12501 || hash == htab->tls_get_addr_fd)
12502 && section->has_tls_reloc
12503 && irela != internal_relocs)
12504 {
12505 /* Get tls info. */
12506 unsigned char *tls_mask;
12507
12508 if (!get_tls_mask (&tls_mask, NULL, NULL, &local_syms,
12509 irela - 1, input_bfd))
12510 goto error_ret_free_internal;
12511 if (*tls_mask != 0)
12512 continue;
12513 }
12514
12515 if (stub_type == ppc_stub_plt_call
12516 && irela + 1 < irelaend
12517 && irela[1].r_offset == irela->r_offset + 4
12518 && ELF64_R_TYPE (irela[1].r_info) == R_PPC64_TOCSAVE)
12519 {
12520 if (!tocsave_find (htab, INSERT,
12521 &local_syms, irela + 1, input_bfd))
12522 goto error_ret_free_internal;
12523 }
12524 else if (stub_type == ppc_stub_plt_call)
12525 stub_type = ppc_stub_plt_call_r2save;
12526
12527 /* Support for grouping stub sections. */
12528 id_sec = htab->sec_info[section->id].u.group->link_sec;
12529
12530 /* Get the name of this stub. */
12531 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
12532 if (!stub_name)
12533 goto error_ret_free_internal;
12534
12535 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
12536 stub_name, FALSE, FALSE);
12537 if (stub_entry != NULL)
12538 {
12539 /* The proper stub has already been created. */
12540 free (stub_name);
12541 if (stub_type == ppc_stub_plt_call_r2save)
12542 stub_entry->stub_type = stub_type;
12543 continue;
12544 }
12545
12546 stub_entry = ppc_add_stub (stub_name, section, info);
12547 if (stub_entry == NULL)
12548 {
12549 free (stub_name);
12550 error_ret_free_internal:
12551 if (elf_section_data (section)->relocs == NULL)
12552 free (internal_relocs);
12553 error_ret_free_local:
12554 if (local_syms != NULL
12555 && (symtab_hdr->contents
12556 != (unsigned char *) local_syms))
12557 free (local_syms);
12558 return FALSE;
12559 }
12560
12561 stub_entry->stub_type = stub_type;
12562 if (stub_type != ppc_stub_plt_call
12563 && stub_type != ppc_stub_plt_call_r2save)
12564 {
12565 stub_entry->target_value = code_value;
12566 stub_entry->target_section = code_sec;
12567 }
12568 else
12569 {
12570 stub_entry->target_value = sym_value;
12571 stub_entry->target_section = sym_sec;
12572 }
12573 stub_entry->h = hash;
12574 stub_entry->plt_ent = plt_ent;
12575 stub_entry->other = hash ? hash->elf.other : sym->st_other;
12576
12577 if (stub_entry->h != NULL)
12578 htab->stub_globals += 1;
12579 }
12580
12581 /* We're done with the internal relocs, free them. */
12582 if (elf_section_data (section)->relocs != internal_relocs)
12583 free (internal_relocs);
12584 }
12585
12586 if (local_syms != NULL
12587 && symtab_hdr->contents != (unsigned char *) local_syms)
12588 {
12589 if (!info->keep_memory)
12590 free (local_syms);
12591 else
12592 symtab_hdr->contents = (unsigned char *) local_syms;
12593 }
12594 }
12595
12596 /* We may have added some stubs. Find out the new size of the
12597 stub sections. */
12598 for (stub_sec = htab->params->stub_bfd->sections;
12599 stub_sec != NULL;
12600 stub_sec = stub_sec->next)
12601 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12602 {
12603 stub_sec->rawsize = stub_sec->size;
12604 stub_sec->size = 0;
12605 stub_sec->reloc_count = 0;
12606 stub_sec->flags &= ~SEC_RELOC;
12607 }
12608
12609 htab->brlt->size = 0;
12610 htab->brlt->reloc_count = 0;
12611 htab->brlt->flags &= ~SEC_RELOC;
12612 if (htab->relbrlt != NULL)
12613 htab->relbrlt->size = 0;
12614
12615 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
12616
12617 for (group = htab->group; group != NULL; group = group->next)
12618 if (group->needs_save_res)
12619 group->stub_sec->size += htab->sfpr->size;
12620
12621 if (info->emitrelocations
12622 && htab->glink != NULL && htab->glink->size != 0)
12623 {
12624 htab->glink->reloc_count = 1;
12625 htab->glink->flags |= SEC_RELOC;
12626 }
12627
12628 if (htab->glink_eh_frame != NULL
12629 && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
12630 && htab->glink_eh_frame->output_section->size != 0)
12631 {
12632 size_t size = 0, align;
12633
12634 for (stub_sec = htab->params->stub_bfd->sections;
12635 stub_sec != NULL;
12636 stub_sec = stub_sec->next)
12637 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12638 size += 24;
12639 if (htab->glink != NULL && htab->glink->size != 0)
12640 size += 24;
12641 if (size != 0)
12642 size += sizeof (glink_eh_frame_cie);
12643 align = 1;
12644 align <<= htab->glink_eh_frame->output_section->alignment_power;
12645 align -= 1;
12646 size = (size + align) & ~align;
12647 htab->glink_eh_frame->rawsize = htab->glink_eh_frame->size;
12648 htab->glink_eh_frame->size = size;
12649 }
12650
12651 if (htab->params->plt_stub_align != 0)
12652 for (stub_sec = htab->params->stub_bfd->sections;
12653 stub_sec != NULL;
12654 stub_sec = stub_sec->next)
12655 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12656 stub_sec->size = ((stub_sec->size
12657 + (1 << htab->params->plt_stub_align) - 1)
12658 & -(1 << htab->params->plt_stub_align));
12659
12660 for (stub_sec = htab->params->stub_bfd->sections;
12661 stub_sec != NULL;
12662 stub_sec = stub_sec->next)
12663 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
12664 && stub_sec->rawsize != stub_sec->size
12665 && (htab->stub_iteration <= STUB_SHRINK_ITER
12666 || stub_sec->rawsize < stub_sec->size))
12667 break;
12668
12669 if (stub_sec == NULL
12670 && (htab->glink_eh_frame == NULL
12671 || htab->glink_eh_frame->rawsize == htab->glink_eh_frame->size))
12672 break;
12673
12674 /* Ask the linker to do its stuff. */
12675 (*htab->params->layout_sections_again) ();
12676 }
12677
12678 if (htab->glink_eh_frame != NULL
12679 && htab->glink_eh_frame->size != 0)
12680 {
12681 bfd_vma val;
12682 bfd_byte *p, *last_fde;
12683 size_t last_fde_len, size, align, pad;
12684 asection *stub_sec;
12685
12686 p = bfd_zalloc (htab->glink_eh_frame->owner, htab->glink_eh_frame->size);
12687 if (p == NULL)
12688 return FALSE;
12689 htab->glink_eh_frame->contents = p;
12690 last_fde = p;
12691
12692 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
12693 /* CIE length (rewrite in case little-endian). */
12694 last_fde_len = sizeof (glink_eh_frame_cie) - 4;
12695 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
12696 p += sizeof (glink_eh_frame_cie);
12697
12698 for (stub_sec = htab->params->stub_bfd->sections;
12699 stub_sec != NULL;
12700 stub_sec = stub_sec->next)
12701 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12702 {
12703 last_fde = p;
12704 last_fde_len = 20;
12705 /* FDE length. */
12706 bfd_put_32 (htab->elf.dynobj, 20, p);
12707 p += 4;
12708 /* CIE pointer. */
12709 val = p - htab->glink_eh_frame->contents;
12710 bfd_put_32 (htab->elf.dynobj, val, p);
12711 p += 4;
12712 /* Offset to stub section, written later. */
12713 p += 4;
12714 /* stub section size. */
12715 bfd_put_32 (htab->elf.dynobj, stub_sec->size, p);
12716 p += 4;
12717 /* Augmentation. */
12718 p += 1;
12719 /* Pad. */
12720 p += 7;
12721 }
12722 if (htab->glink != NULL && htab->glink->size != 0)
12723 {
12724 last_fde = p;
12725 last_fde_len = 20;
12726 /* FDE length. */
12727 bfd_put_32 (htab->elf.dynobj, 20, p);
12728 p += 4;
12729 /* CIE pointer. */
12730 val = p - htab->glink_eh_frame->contents;
12731 bfd_put_32 (htab->elf.dynobj, val, p);
12732 p += 4;
12733 /* Offset to .glink, written later. */
12734 p += 4;
12735 /* .glink size. */
12736 bfd_put_32 (htab->elf.dynobj, htab->glink->size - 8, p);
12737 p += 4;
12738 /* Augmentation. */
12739 p += 1;
12740
12741 *p++ = DW_CFA_advance_loc + 1;
12742 *p++ = DW_CFA_register;
12743 *p++ = 65;
12744 *p++ = htab->opd_abi ? 12 : 0;
12745 *p++ = DW_CFA_advance_loc + 4;
12746 *p++ = DW_CFA_restore_extended;
12747 *p++ = 65;
12748 }
12749 /* Subsume any padding into the last FDE if user .eh_frame
12750 sections are aligned more than glink_eh_frame. Otherwise any
12751 zero padding will be seen as a terminator. */
12752 size = p - htab->glink_eh_frame->contents;
12753 align = 1;
12754 align <<= htab->glink_eh_frame->output_section->alignment_power;
12755 align -= 1;
12756 pad = ((size + align) & ~align) - size;
12757 htab->glink_eh_frame->size = size + pad;
12758 bfd_put_32 (htab->elf.dynobj, last_fde_len + pad, last_fde);
12759 }
12760
12761 maybe_strip_output (info, htab->brlt);
12762 if (htab->glink_eh_frame != NULL)
12763 maybe_strip_output (info, htab->glink_eh_frame);
12764
12765 return TRUE;
12766 }
12767
12768 /* Called after we have determined section placement. If sections
12769 move, we'll be called again. Provide a value for TOCstart. */
12770
12771 bfd_vma
12772 ppc64_elf_set_toc (struct bfd_link_info *info, bfd *obfd)
12773 {
12774 asection *s;
12775 bfd_vma TOCstart, adjust;
12776
12777 if (info != NULL)
12778 {
12779 struct elf_link_hash_entry *h;
12780 struct elf_link_hash_table *htab = elf_hash_table (info);
12781
12782 if (is_elf_hash_table (htab)
12783 && htab->hgot != NULL)
12784 h = htab->hgot;
12785 else
12786 {
12787 h = elf_link_hash_lookup (htab, ".TOC.", FALSE, FALSE, TRUE);
12788 if (is_elf_hash_table (htab))
12789 htab->hgot = h;
12790 }
12791 if (h != NULL
12792 && h->root.type == bfd_link_hash_defined
12793 && !h->root.linker_def
12794 && (!is_elf_hash_table (htab)
12795 || h->def_regular))
12796 {
12797 TOCstart = (h->root.u.def.value - TOC_BASE_OFF
12798 + h->root.u.def.section->output_offset
12799 + h->root.u.def.section->output_section->vma);
12800 _bfd_set_gp_value (obfd, TOCstart);
12801 return TOCstart;
12802 }
12803 }
12804
12805 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
12806 order. The TOC starts where the first of these sections starts. */
12807 s = bfd_get_section_by_name (obfd, ".got");
12808 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12809 s = bfd_get_section_by_name (obfd, ".toc");
12810 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12811 s = bfd_get_section_by_name (obfd, ".tocbss");
12812 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12813 s = bfd_get_section_by_name (obfd, ".plt");
12814 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12815 {
12816 /* This may happen for
12817 o references to TOC base (SYM@toc / TOC[tc0]) without a
12818 .toc directive
12819 o bad linker script
12820 o --gc-sections and empty TOC sections
12821
12822 FIXME: Warn user? */
12823
12824 /* Look for a likely section. We probably won't even be
12825 using TOCstart. */
12826 for (s = obfd->sections; s != NULL; s = s->next)
12827 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY
12828 | SEC_EXCLUDE))
12829 == (SEC_ALLOC | SEC_SMALL_DATA))
12830 break;
12831 if (s == NULL)
12832 for (s = obfd->sections; s != NULL; s = s->next)
12833 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_EXCLUDE))
12834 == (SEC_ALLOC | SEC_SMALL_DATA))
12835 break;
12836 if (s == NULL)
12837 for (s = obfd->sections; s != NULL; s = s->next)
12838 if ((s->flags & (SEC_ALLOC | SEC_READONLY | SEC_EXCLUDE))
12839 == SEC_ALLOC)
12840 break;
12841 if (s == NULL)
12842 for (s = obfd->sections; s != NULL; s = s->next)
12843 if ((s->flags & (SEC_ALLOC | SEC_EXCLUDE)) == SEC_ALLOC)
12844 break;
12845 }
12846
12847 TOCstart = 0;
12848 if (s != NULL)
12849 TOCstart = s->output_section->vma + s->output_offset;
12850
12851 /* Force alignment. */
12852 adjust = TOCstart & (TOC_BASE_ALIGN - 1);
12853 TOCstart -= adjust;
12854 _bfd_set_gp_value (obfd, TOCstart);
12855
12856 if (info != NULL && s != NULL)
12857 {
12858 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12859
12860 if (htab != NULL)
12861 {
12862 if (htab->elf.hgot != NULL)
12863 {
12864 htab->elf.hgot->root.u.def.value = TOC_BASE_OFF - adjust;
12865 htab->elf.hgot->root.u.def.section = s;
12866 }
12867 }
12868 else
12869 {
12870 struct bfd_link_hash_entry *bh = NULL;
12871 _bfd_generic_link_add_one_symbol (info, obfd, ".TOC.", BSF_GLOBAL,
12872 s, TOC_BASE_OFF - adjust,
12873 NULL, FALSE, FALSE, &bh);
12874 }
12875 }
12876 return TOCstart;
12877 }
12878
12879 /* Called via elf_link_hash_traverse from ppc64_elf_build_stubs to
12880 write out any global entry stubs. */
12881
12882 static bfd_boolean
12883 build_global_entry_stubs (struct elf_link_hash_entry *h, void *inf)
12884 {
12885 struct bfd_link_info *info;
12886 struct ppc_link_hash_table *htab;
12887 struct plt_entry *pent;
12888 asection *s;
12889
12890 if (h->root.type == bfd_link_hash_indirect)
12891 return TRUE;
12892
12893 if (!h->pointer_equality_needed)
12894 return TRUE;
12895
12896 if (h->def_regular)
12897 return TRUE;
12898
12899 info = inf;
12900 htab = ppc_hash_table (info);
12901 if (htab == NULL)
12902 return FALSE;
12903
12904 s = htab->glink;
12905 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
12906 if (pent->plt.offset != (bfd_vma) -1
12907 && pent->addend == 0)
12908 {
12909 bfd_byte *p;
12910 asection *plt;
12911 bfd_vma off;
12912
12913 p = s->contents + h->root.u.def.value;
12914 plt = htab->elf.splt;
12915 if (!htab->elf.dynamic_sections_created
12916 || h->dynindx == -1)
12917 plt = htab->elf.iplt;
12918 off = pent->plt.offset + plt->output_offset + plt->output_section->vma;
12919 off -= h->root.u.def.value + s->output_offset + s->output_section->vma;
12920
12921 if (off + 0x80008000 > 0xffffffff || (off & 3) != 0)
12922 {
12923 info->callbacks->einfo
12924 (_("%P: linkage table error against `%T'\n"),
12925 h->root.root.string);
12926 bfd_set_error (bfd_error_bad_value);
12927 htab->stub_error = TRUE;
12928 }
12929
12930 htab->stub_count[ppc_stub_global_entry - 1] += 1;
12931 if (htab->params->emit_stub_syms)
12932 {
12933 size_t len = strlen (h->root.root.string);
12934 char *name = bfd_malloc (sizeof "12345678.global_entry." + len);
12935
12936 if (name == NULL)
12937 return FALSE;
12938
12939 sprintf (name, "%08x.global_entry.%s", s->id, h->root.root.string);
12940 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
12941 if (h == NULL)
12942 return FALSE;
12943 if (h->root.type == bfd_link_hash_new)
12944 {
12945 h->root.type = bfd_link_hash_defined;
12946 h->root.u.def.section = s;
12947 h->root.u.def.value = p - s->contents;
12948 h->ref_regular = 1;
12949 h->def_regular = 1;
12950 h->ref_regular_nonweak = 1;
12951 h->forced_local = 1;
12952 h->non_elf = 0;
12953 h->root.linker_def = 1;
12954 }
12955 }
12956
12957 if (PPC_HA (off) != 0)
12958 {
12959 bfd_put_32 (s->owner, ADDIS_R12_R12 | PPC_HA (off), p);
12960 p += 4;
12961 }
12962 bfd_put_32 (s->owner, LD_R12_0R12 | PPC_LO (off), p);
12963 p += 4;
12964 bfd_put_32 (s->owner, MTCTR_R12, p);
12965 p += 4;
12966 bfd_put_32 (s->owner, BCTR, p);
12967 break;
12968 }
12969 return TRUE;
12970 }
12971
12972 /* Build all the stubs associated with the current output file.
12973 The stubs are kept in a hash table attached to the main linker
12974 hash table. This function is called via gldelf64ppc_finish. */
12975
12976 bfd_boolean
12977 ppc64_elf_build_stubs (struct bfd_link_info *info,
12978 char **stats)
12979 {
12980 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12981 struct map_stub *group;
12982 asection *stub_sec;
12983 bfd_byte *p;
12984 int stub_sec_count = 0;
12985
12986 if (htab == NULL)
12987 return FALSE;
12988
12989 /* Allocate memory to hold the linker stubs. */
12990 for (stub_sec = htab->params->stub_bfd->sections;
12991 stub_sec != NULL;
12992 stub_sec = stub_sec->next)
12993 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
12994 && stub_sec->size != 0)
12995 {
12996 stub_sec->contents = bfd_zalloc (htab->params->stub_bfd, stub_sec->size);
12997 if (stub_sec->contents == NULL)
12998 return FALSE;
12999 stub_sec->size = 0;
13000 }
13001
13002 if (htab->glink != NULL && htab->glink->size != 0)
13003 {
13004 unsigned int indx;
13005 bfd_vma plt0;
13006
13007 /* Build the .glink plt call stub. */
13008 if (htab->params->emit_stub_syms)
13009 {
13010 struct elf_link_hash_entry *h;
13011 h = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
13012 TRUE, FALSE, FALSE);
13013 if (h == NULL)
13014 return FALSE;
13015 if (h->root.type == bfd_link_hash_new)
13016 {
13017 h->root.type = bfd_link_hash_defined;
13018 h->root.u.def.section = htab->glink;
13019 h->root.u.def.value = 8;
13020 h->ref_regular = 1;
13021 h->def_regular = 1;
13022 h->ref_regular_nonweak = 1;
13023 h->forced_local = 1;
13024 h->non_elf = 0;
13025 h->root.linker_def = 1;
13026 }
13027 }
13028 plt0 = (htab->elf.splt->output_section->vma
13029 + htab->elf.splt->output_offset
13030 - 16);
13031 if (info->emitrelocations)
13032 {
13033 Elf_Internal_Rela *r = get_relocs (htab->glink, 1);
13034 if (r == NULL)
13035 return FALSE;
13036 r->r_offset = (htab->glink->output_offset
13037 + htab->glink->output_section->vma);
13038 r->r_info = ELF64_R_INFO (0, R_PPC64_REL64);
13039 r->r_addend = plt0;
13040 }
13041 p = htab->glink->contents;
13042 plt0 -= htab->glink->output_section->vma + htab->glink->output_offset;
13043 bfd_put_64 (htab->glink->owner, plt0, p);
13044 p += 8;
13045 if (htab->opd_abi)
13046 {
13047 bfd_put_32 (htab->glink->owner, MFLR_R12, p);
13048 p += 4;
13049 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
13050 p += 4;
13051 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
13052 p += 4;
13053 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | (-16 & 0xfffc), p);
13054 p += 4;
13055 bfd_put_32 (htab->glink->owner, MTLR_R12, p);
13056 p += 4;
13057 bfd_put_32 (htab->glink->owner, ADD_R11_R2_R11, p);
13058 p += 4;
13059 bfd_put_32 (htab->glink->owner, LD_R12_0R11, p);
13060 p += 4;
13061 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | 8, p);
13062 p += 4;
13063 bfd_put_32 (htab->glink->owner, MTCTR_R12, p);
13064 p += 4;
13065 bfd_put_32 (htab->glink->owner, LD_R11_0R11 | 16, p);
13066 p += 4;
13067 }
13068 else
13069 {
13070 bfd_put_32 (htab->glink->owner, MFLR_R0, p);
13071 p += 4;
13072 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
13073 p += 4;
13074 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
13075 p += 4;
13076 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | (-16 & 0xfffc), p);
13077 p += 4;
13078 bfd_put_32 (htab->glink->owner, MTLR_R0, p);
13079 p += 4;
13080 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
13081 p += 4;
13082 bfd_put_32 (htab->glink->owner, ADD_R11_R2_R11, p);
13083 p += 4;
13084 bfd_put_32 (htab->glink->owner, ADDI_R0_R12 | (-48 & 0xffff), p);
13085 p += 4;
13086 bfd_put_32 (htab->glink->owner, LD_R12_0R11, p);
13087 p += 4;
13088 bfd_put_32 (htab->glink->owner, SRDI_R0_R0_2, p);
13089 p += 4;
13090 bfd_put_32 (htab->glink->owner, MTCTR_R12, p);
13091 p += 4;
13092 bfd_put_32 (htab->glink->owner, LD_R11_0R11 | 8, p);
13093 p += 4;
13094 }
13095 bfd_put_32 (htab->glink->owner, BCTR, p);
13096 p += 4;
13097 while (p - htab->glink->contents < GLINK_CALL_STUB_SIZE)
13098 {
13099 bfd_put_32 (htab->glink->owner, NOP, p);
13100 p += 4;
13101 }
13102
13103 /* Build the .glink lazy link call stubs. */
13104 indx = 0;
13105 while (p < htab->glink->contents + htab->glink->rawsize)
13106 {
13107 if (htab->opd_abi)
13108 {
13109 if (indx < 0x8000)
13110 {
13111 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
13112 p += 4;
13113 }
13114 else
13115 {
13116 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
13117 p += 4;
13118 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx),
13119 p);
13120 p += 4;
13121 }
13122 }
13123 bfd_put_32 (htab->glink->owner,
13124 B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p);
13125 indx++;
13126 p += 4;
13127 }
13128
13129 /* Build .glink global entry stubs. */
13130 if (htab->glink->size > htab->glink->rawsize)
13131 elf_link_hash_traverse (&htab->elf, build_global_entry_stubs, info);
13132 }
13133
13134 if (htab->brlt != NULL && htab->brlt->size != 0)
13135 {
13136 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
13137 htab->brlt->size);
13138 if (htab->brlt->contents == NULL)
13139 return FALSE;
13140 }
13141 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
13142 {
13143 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
13144 htab->relbrlt->size);
13145 if (htab->relbrlt->contents == NULL)
13146 return FALSE;
13147 }
13148
13149 /* Build the stubs as directed by the stub hash table. */
13150 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
13151
13152 for (group = htab->group; group != NULL; group = group->next)
13153 if (group->needs_save_res)
13154 {
13155 stub_sec = group->stub_sec;
13156 memcpy (stub_sec->contents + stub_sec->size, htab->sfpr->contents,
13157 htab->sfpr->size);
13158 if (htab->params->emit_stub_syms)
13159 {
13160 unsigned int i;
13161
13162 for (i = 0; i < ARRAY_SIZE (save_res_funcs); i++)
13163 if (!sfpr_define (info, &save_res_funcs[i], stub_sec))
13164 return FALSE;
13165 }
13166 stub_sec->size += htab->sfpr->size;
13167 }
13168
13169 if (htab->relbrlt != NULL)
13170 htab->relbrlt->reloc_count = 0;
13171
13172 if (htab->params->plt_stub_align != 0)
13173 for (stub_sec = htab->params->stub_bfd->sections;
13174 stub_sec != NULL;
13175 stub_sec = stub_sec->next)
13176 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
13177 stub_sec->size = ((stub_sec->size
13178 + (1 << htab->params->plt_stub_align) - 1)
13179 & -(1 << htab->params->plt_stub_align));
13180
13181 for (stub_sec = htab->params->stub_bfd->sections;
13182 stub_sec != NULL;
13183 stub_sec = stub_sec->next)
13184 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
13185 {
13186 stub_sec_count += 1;
13187 if (stub_sec->rawsize != stub_sec->size
13188 && (htab->stub_iteration <= STUB_SHRINK_ITER
13189 || stub_sec->rawsize < stub_sec->size))
13190 break;
13191 }
13192
13193 /* Note that the glink_eh_frame check here is not only testing that
13194 the generated size matched the calculated size but also that
13195 bfd_elf_discard_info didn't make any changes to the section. */
13196 if (stub_sec != NULL
13197 || (htab->glink_eh_frame != NULL
13198 && htab->glink_eh_frame->rawsize != htab->glink_eh_frame->size))
13199 {
13200 htab->stub_error = TRUE;
13201 info->callbacks->einfo (_("%P: stubs don't match calculated size\n"));
13202 }
13203
13204 if (htab->stub_error)
13205 return FALSE;
13206
13207 if (stats != NULL)
13208 {
13209 *stats = bfd_malloc (500);
13210 if (*stats == NULL)
13211 return FALSE;
13212
13213 sprintf (*stats, _("linker stubs in %u group%s\n"
13214 " branch %lu\n"
13215 " toc adjust %lu\n"
13216 " long branch %lu\n"
13217 " long toc adj %lu\n"
13218 " plt call %lu\n"
13219 " plt call toc %lu\n"
13220 " global entry %lu"),
13221 stub_sec_count,
13222 stub_sec_count == 1 ? "" : "s",
13223 htab->stub_count[ppc_stub_long_branch - 1],
13224 htab->stub_count[ppc_stub_long_branch_r2off - 1],
13225 htab->stub_count[ppc_stub_plt_branch - 1],
13226 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
13227 htab->stub_count[ppc_stub_plt_call - 1],
13228 htab->stub_count[ppc_stub_plt_call_r2save - 1],
13229 htab->stub_count[ppc_stub_global_entry - 1]);
13230 }
13231 return TRUE;
13232 }
13233
13234 /* This function undoes the changes made by add_symbol_adjust. */
13235
13236 static bfd_boolean
13237 undo_symbol_twiddle (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
13238 {
13239 struct ppc_link_hash_entry *eh;
13240
13241 if (h->root.type == bfd_link_hash_indirect)
13242 return TRUE;
13243
13244 eh = (struct ppc_link_hash_entry *) h;
13245 if (eh->elf.root.type != bfd_link_hash_undefweak || !eh->was_undefined)
13246 return TRUE;
13247
13248 eh->elf.root.type = bfd_link_hash_undefined;
13249 return TRUE;
13250 }
13251
13252 void
13253 ppc64_elf_restore_symbols (struct bfd_link_info *info)
13254 {
13255 struct ppc_link_hash_table *htab = ppc_hash_table (info);
13256
13257 if (htab != NULL)
13258 elf_link_hash_traverse (&htab->elf, undo_symbol_twiddle, info);
13259 }
13260
13261 /* What to do when ld finds relocations against symbols defined in
13262 discarded sections. */
13263
13264 static unsigned int
13265 ppc64_elf_action_discarded (asection *sec)
13266 {
13267 if (strcmp (".opd", sec->name) == 0)
13268 return 0;
13269
13270 if (strcmp (".toc", sec->name) == 0)
13271 return 0;
13272
13273 if (strcmp (".toc1", sec->name) == 0)
13274 return 0;
13275
13276 return _bfd_elf_default_action_discarded (sec);
13277 }
13278
13279 /* The RELOCATE_SECTION function is called by the ELF backend linker
13280 to handle the relocations for a section.
13281
13282 The relocs are always passed as Rela structures; if the section
13283 actually uses Rel structures, the r_addend field will always be
13284 zero.
13285
13286 This function is responsible for adjust the section contents as
13287 necessary, and (if using Rela relocs and generating a
13288 relocatable output file) adjusting the reloc addend as
13289 necessary.
13290
13291 This function does not have to worry about setting the reloc
13292 address or the reloc symbol index.
13293
13294 LOCAL_SYMS is a pointer to the swapped in local symbols.
13295
13296 LOCAL_SECTIONS is an array giving the section in the input file
13297 corresponding to the st_shndx field of each local symbol.
13298
13299 The global hash table entry for the global symbols can be found
13300 via elf_sym_hashes (input_bfd).
13301
13302 When generating relocatable output, this function must handle
13303 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
13304 going to be the section symbol corresponding to the output
13305 section, which means that the addend must be adjusted
13306 accordingly. */
13307
13308 static bfd_boolean
13309 ppc64_elf_relocate_section (bfd *output_bfd,
13310 struct bfd_link_info *info,
13311 bfd *input_bfd,
13312 asection *input_section,
13313 bfd_byte *contents,
13314 Elf_Internal_Rela *relocs,
13315 Elf_Internal_Sym *local_syms,
13316 asection **local_sections)
13317 {
13318 struct ppc_link_hash_table *htab;
13319 Elf_Internal_Shdr *symtab_hdr;
13320 struct elf_link_hash_entry **sym_hashes;
13321 Elf_Internal_Rela *rel;
13322 Elf_Internal_Rela *wrel;
13323 Elf_Internal_Rela *relend;
13324 Elf_Internal_Rela outrel;
13325 bfd_byte *loc;
13326 struct got_entry **local_got_ents;
13327 bfd_vma TOCstart;
13328 bfd_boolean ret = TRUE;
13329 bfd_boolean is_opd;
13330 /* Assume 'at' branch hints. */
13331 bfd_boolean is_isa_v2 = TRUE;
13332 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
13333
13334 /* Initialize howto table if needed. */
13335 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
13336 ppc_howto_init ();
13337
13338 htab = ppc_hash_table (info);
13339 if (htab == NULL)
13340 return FALSE;
13341
13342 /* Don't relocate stub sections. */
13343 if (input_section->owner == htab->params->stub_bfd)
13344 return TRUE;
13345
13346 BFD_ASSERT (is_ppc64_elf (input_bfd));
13347
13348 local_got_ents = elf_local_got_ents (input_bfd);
13349 TOCstart = elf_gp (output_bfd);
13350 symtab_hdr = &elf_symtab_hdr (input_bfd);
13351 sym_hashes = elf_sym_hashes (input_bfd);
13352 is_opd = ppc64_elf_section_data (input_section)->sec_type == sec_opd;
13353
13354 rel = wrel = relocs;
13355 relend = relocs + input_section->reloc_count;
13356 for (; rel < relend; wrel++, rel++)
13357 {
13358 enum elf_ppc64_reloc_type r_type;
13359 bfd_vma addend;
13360 bfd_reloc_status_type r;
13361 Elf_Internal_Sym *sym;
13362 asection *sec;
13363 struct elf_link_hash_entry *h_elf;
13364 struct ppc_link_hash_entry *h;
13365 struct ppc_link_hash_entry *fdh;
13366 const char *sym_name;
13367 unsigned long r_symndx, toc_symndx;
13368 bfd_vma toc_addend;
13369 unsigned char tls_mask, tls_gd, tls_type;
13370 unsigned char sym_type;
13371 bfd_vma relocation;
13372 bfd_boolean unresolved_reloc;
13373 bfd_boolean warned;
13374 enum { DEST_NORMAL, DEST_OPD, DEST_STUB } reloc_dest;
13375 unsigned int insn;
13376 unsigned int mask;
13377 struct ppc_stub_hash_entry *stub_entry;
13378 bfd_vma max_br_offset;
13379 bfd_vma from;
13380 Elf_Internal_Rela orig_rel;
13381 reloc_howto_type *howto;
13382 struct reloc_howto_struct alt_howto;
13383
13384 again:
13385 orig_rel = *rel;
13386
13387 r_type = ELF64_R_TYPE (rel->r_info);
13388 r_symndx = ELF64_R_SYM (rel->r_info);
13389
13390 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
13391 symbol of the previous ADDR64 reloc. The symbol gives us the
13392 proper TOC base to use. */
13393 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
13394 && wrel != relocs
13395 && ELF64_R_TYPE (wrel[-1].r_info) == R_PPC64_ADDR64
13396 && is_opd)
13397 r_symndx = ELF64_R_SYM (wrel[-1].r_info);
13398
13399 sym = NULL;
13400 sec = NULL;
13401 h_elf = NULL;
13402 sym_name = NULL;
13403 unresolved_reloc = FALSE;
13404 warned = FALSE;
13405
13406 if (r_symndx < symtab_hdr->sh_info)
13407 {
13408 /* It's a local symbol. */
13409 struct _opd_sec_data *opd;
13410
13411 sym = local_syms + r_symndx;
13412 sec = local_sections[r_symndx];
13413 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
13414 sym_type = ELF64_ST_TYPE (sym->st_info);
13415 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
13416 opd = get_opd_info (sec);
13417 if (opd != NULL && opd->adjust != NULL)
13418 {
13419 long adjust = opd->adjust[OPD_NDX (sym->st_value
13420 + rel->r_addend)];
13421 if (adjust == -1)
13422 relocation = 0;
13423 else
13424 {
13425 /* If this is a relocation against the opd section sym
13426 and we have edited .opd, adjust the reloc addend so
13427 that ld -r and ld --emit-relocs output is correct.
13428 If it is a reloc against some other .opd symbol,
13429 then the symbol value will be adjusted later. */
13430 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
13431 rel->r_addend += adjust;
13432 else
13433 relocation += adjust;
13434 }
13435 }
13436 }
13437 else
13438 {
13439 bfd_boolean ignored;
13440
13441 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
13442 r_symndx, symtab_hdr, sym_hashes,
13443 h_elf, sec, relocation,
13444 unresolved_reloc, warned, ignored);
13445 sym_name = h_elf->root.root.string;
13446 sym_type = h_elf->type;
13447 if (sec != NULL
13448 && sec->owner == output_bfd
13449 && strcmp (sec->name, ".opd") == 0)
13450 {
13451 /* This is a symbol defined in a linker script. All
13452 such are defined in output sections, even those
13453 defined by simple assignment from a symbol defined in
13454 an input section. Transfer the symbol to an
13455 appropriate input .opd section, so that a branch to
13456 this symbol will be mapped to the location specified
13457 by the opd entry. */
13458 struct bfd_link_order *lo;
13459 for (lo = sec->map_head.link_order; lo != NULL; lo = lo->next)
13460 if (lo->type == bfd_indirect_link_order)
13461 {
13462 asection *isec = lo->u.indirect.section;
13463 if (h_elf->root.u.def.value >= isec->output_offset
13464 && h_elf->root.u.def.value < (isec->output_offset
13465 + isec->size))
13466 {
13467 h_elf->root.u.def.value -= isec->output_offset;
13468 h_elf->root.u.def.section = isec;
13469 sec = isec;
13470 break;
13471 }
13472 }
13473 }
13474 }
13475 h = (struct ppc_link_hash_entry *) h_elf;
13476
13477 if (sec != NULL && discarded_section (sec))
13478 {
13479 _bfd_clear_contents (ppc64_elf_howto_table[r_type],
13480 input_bfd, input_section,
13481 contents + rel->r_offset);
13482 wrel->r_offset = rel->r_offset;
13483 wrel->r_info = 0;
13484 wrel->r_addend = 0;
13485
13486 /* For ld -r, remove relocations in debug sections against
13487 sections defined in discarded sections. Not done for
13488 non-debug to preserve relocs in .eh_frame which the
13489 eh_frame editing code expects to be present. */
13490 if (bfd_link_relocatable (info)
13491 && (input_section->flags & SEC_DEBUGGING))
13492 wrel--;
13493
13494 continue;
13495 }
13496
13497 if (bfd_link_relocatable (info))
13498 goto copy_reloc;
13499
13500 if (h != NULL && &h->elf == htab->elf.hgot)
13501 {
13502 relocation = TOCstart + htab->sec_info[input_section->id].toc_off;
13503 sec = bfd_abs_section_ptr;
13504 unresolved_reloc = FALSE;
13505 }
13506
13507 /* TLS optimizations. Replace instruction sequences and relocs
13508 based on information we collected in tls_optimize. We edit
13509 RELOCS so that --emit-relocs will output something sensible
13510 for the final instruction stream. */
13511 tls_mask = 0;
13512 tls_gd = 0;
13513 toc_symndx = 0;
13514 if (h != NULL)
13515 tls_mask = h->tls_mask;
13516 else if (local_got_ents != NULL)
13517 {
13518 struct plt_entry **local_plt = (struct plt_entry **)
13519 (local_got_ents + symtab_hdr->sh_info);
13520 unsigned char *lgot_masks = (unsigned char *)
13521 (local_plt + symtab_hdr->sh_info);
13522 tls_mask = lgot_masks[r_symndx];
13523 }
13524 if (tls_mask == 0
13525 && (r_type == R_PPC64_TLS
13526 || r_type == R_PPC64_TLSGD
13527 || r_type == R_PPC64_TLSLD))
13528 {
13529 /* Check for toc tls entries. */
13530 unsigned char *toc_tls;
13531
13532 if (!get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
13533 &local_syms, rel, input_bfd))
13534 return FALSE;
13535
13536 if (toc_tls)
13537 tls_mask = *toc_tls;
13538 }
13539
13540 /* Check that tls relocs are used with tls syms, and non-tls
13541 relocs are used with non-tls syms. */
13542 if (r_symndx != STN_UNDEF
13543 && r_type != R_PPC64_NONE
13544 && (h == NULL
13545 || h->elf.root.type == bfd_link_hash_defined
13546 || h->elf.root.type == bfd_link_hash_defweak)
13547 && (IS_PPC64_TLS_RELOC (r_type)
13548 != (sym_type == STT_TLS
13549 || (sym_type == STT_SECTION
13550 && (sec->flags & SEC_THREAD_LOCAL) != 0))))
13551 {
13552 if (tls_mask != 0
13553 && (r_type == R_PPC64_TLS
13554 || r_type == R_PPC64_TLSGD
13555 || r_type == R_PPC64_TLSLD))
13556 /* R_PPC64_TLS is OK against a symbol in the TOC. */
13557 ;
13558 else
13559 info->callbacks->einfo
13560 (!IS_PPC64_TLS_RELOC (r_type)
13561 ? _("%P: %H: %s used with TLS symbol `%T'\n")
13562 : _("%P: %H: %s used with non-TLS symbol `%T'\n"),
13563 input_bfd, input_section, rel->r_offset,
13564 ppc64_elf_howto_table[r_type]->name,
13565 sym_name);
13566 }
13567
13568 /* Ensure reloc mapping code below stays sane. */
13569 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
13570 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
13571 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
13572 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
13573 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
13574 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
13575 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
13576 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
13577 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
13578 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
13579 abort ();
13580
13581 switch (r_type)
13582 {
13583 default:
13584 break;
13585
13586 case R_PPC64_LO_DS_OPT:
13587 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
13588 if ((insn & (0x3f << 26)) != 58u << 26)
13589 abort ();
13590 insn += (14u << 26) - (58u << 26);
13591 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
13592 r_type = R_PPC64_TOC16_LO;
13593 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13594 break;
13595
13596 case R_PPC64_TOC16:
13597 case R_PPC64_TOC16_LO:
13598 case R_PPC64_TOC16_DS:
13599 case R_PPC64_TOC16_LO_DS:
13600 {
13601 /* Check for toc tls entries. */
13602 unsigned char *toc_tls;
13603 int retval;
13604
13605 retval = get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
13606 &local_syms, rel, input_bfd);
13607 if (retval == 0)
13608 return FALSE;
13609
13610 if (toc_tls)
13611 {
13612 tls_mask = *toc_tls;
13613 if (r_type == R_PPC64_TOC16_DS
13614 || r_type == R_PPC64_TOC16_LO_DS)
13615 {
13616 if (tls_mask != 0
13617 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
13618 goto toctprel;
13619 }
13620 else
13621 {
13622 /* If we found a GD reloc pair, then we might be
13623 doing a GD->IE transition. */
13624 if (retval == 2)
13625 {
13626 tls_gd = TLS_TPRELGD;
13627 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13628 goto tls_ldgd_opt;
13629 }
13630 else if (retval == 3)
13631 {
13632 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13633 goto tls_ldgd_opt;
13634 }
13635 }
13636 }
13637 }
13638 break;
13639
13640 case R_PPC64_GOT_TPREL16_HI:
13641 case R_PPC64_GOT_TPREL16_HA:
13642 if (tls_mask != 0
13643 && (tls_mask & TLS_TPREL) == 0)
13644 {
13645 rel->r_offset -= d_offset;
13646 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
13647 r_type = R_PPC64_NONE;
13648 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13649 }
13650 break;
13651
13652 case R_PPC64_GOT_TPREL16_DS:
13653 case R_PPC64_GOT_TPREL16_LO_DS:
13654 if (tls_mask != 0
13655 && (tls_mask & TLS_TPREL) == 0)
13656 {
13657 toctprel:
13658 insn = bfd_get_32 (output_bfd,
13659 contents + rel->r_offset - d_offset);
13660 insn &= 31 << 21;
13661 insn |= 0x3c0d0000; /* addis 0,13,0 */
13662 bfd_put_32 (output_bfd, insn,
13663 contents + rel->r_offset - d_offset);
13664 r_type = R_PPC64_TPREL16_HA;
13665 if (toc_symndx != 0)
13666 {
13667 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
13668 rel->r_addend = toc_addend;
13669 /* We changed the symbol. Start over in order to
13670 get h, sym, sec etc. right. */
13671 goto again;
13672 }
13673 else
13674 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13675 }
13676 break;
13677
13678 case R_PPC64_TLS:
13679 if (tls_mask != 0
13680 && (tls_mask & TLS_TPREL) == 0)
13681 {
13682 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
13683 insn = _bfd_elf_ppc_at_tls_transform (insn, 13);
13684 if (insn == 0)
13685 abort ();
13686 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
13687 /* Was PPC64_TLS which sits on insn boundary, now
13688 PPC64_TPREL16_LO which is at low-order half-word. */
13689 rel->r_offset += d_offset;
13690 r_type = R_PPC64_TPREL16_LO;
13691 if (toc_symndx != 0)
13692 {
13693 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
13694 rel->r_addend = toc_addend;
13695 /* We changed the symbol. Start over in order to
13696 get h, sym, sec etc. right. */
13697 goto again;
13698 }
13699 else
13700 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13701 }
13702 break;
13703
13704 case R_PPC64_GOT_TLSGD16_HI:
13705 case R_PPC64_GOT_TLSGD16_HA:
13706 tls_gd = TLS_TPRELGD;
13707 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13708 goto tls_gdld_hi;
13709 break;
13710
13711 case R_PPC64_GOT_TLSLD16_HI:
13712 case R_PPC64_GOT_TLSLD16_HA:
13713 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13714 {
13715 tls_gdld_hi:
13716 if ((tls_mask & tls_gd) != 0)
13717 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
13718 + R_PPC64_GOT_TPREL16_DS);
13719 else
13720 {
13721 rel->r_offset -= d_offset;
13722 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
13723 r_type = R_PPC64_NONE;
13724 }
13725 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13726 }
13727 break;
13728
13729 case R_PPC64_GOT_TLSGD16:
13730 case R_PPC64_GOT_TLSGD16_LO:
13731 tls_gd = TLS_TPRELGD;
13732 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13733 goto tls_ldgd_opt;
13734 break;
13735
13736 case R_PPC64_GOT_TLSLD16:
13737 case R_PPC64_GOT_TLSLD16_LO:
13738 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13739 {
13740 unsigned int insn1, insn2, insn3;
13741 bfd_vma offset;
13742
13743 tls_ldgd_opt:
13744 offset = (bfd_vma) -1;
13745 /* If not using the newer R_PPC64_TLSGD/LD to mark
13746 __tls_get_addr calls, we must trust that the call
13747 stays with its arg setup insns, ie. that the next
13748 reloc is the __tls_get_addr call associated with
13749 the current reloc. Edit both insns. */
13750 if (input_section->has_tls_get_addr_call
13751 && rel + 1 < relend
13752 && branch_reloc_hash_match (input_bfd, rel + 1,
13753 htab->tls_get_addr,
13754 htab->tls_get_addr_fd))
13755 offset = rel[1].r_offset;
13756 /* We read the low GOT_TLS (or TOC16) insn because we
13757 need to keep the destination reg. It may be
13758 something other than the usual r3, and moved to r3
13759 before the call by intervening code. */
13760 insn1 = bfd_get_32 (output_bfd,
13761 contents + rel->r_offset - d_offset);
13762 if ((tls_mask & tls_gd) != 0)
13763 {
13764 /* IE */
13765 insn1 &= (0x1f << 21) | (0x1f << 16);
13766 insn1 |= 58 << 26; /* ld */
13767 insn2 = 0x7c636a14; /* add 3,3,13 */
13768 if (offset != (bfd_vma) -1)
13769 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13770 if ((tls_mask & TLS_EXPLICIT) == 0)
13771 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
13772 + R_PPC64_GOT_TPREL16_DS);
13773 else
13774 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
13775 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13776 }
13777 else
13778 {
13779 /* LE */
13780 insn1 &= 0x1f << 21;
13781 insn1 |= 0x3c0d0000; /* addis r,13,0 */
13782 insn2 = 0x38630000; /* addi 3,3,0 */
13783 if (tls_gd == 0)
13784 {
13785 /* Was an LD reloc. */
13786 if (toc_symndx)
13787 sec = local_sections[toc_symndx];
13788 for (r_symndx = 0;
13789 r_symndx < symtab_hdr->sh_info;
13790 r_symndx++)
13791 if (local_sections[r_symndx] == sec)
13792 break;
13793 if (r_symndx >= symtab_hdr->sh_info)
13794 r_symndx = STN_UNDEF;
13795 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
13796 if (r_symndx != STN_UNDEF)
13797 rel->r_addend -= (local_syms[r_symndx].st_value
13798 + sec->output_offset
13799 + sec->output_section->vma);
13800 }
13801 else if (toc_symndx != 0)
13802 {
13803 r_symndx = toc_symndx;
13804 rel->r_addend = toc_addend;
13805 }
13806 r_type = R_PPC64_TPREL16_HA;
13807 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13808 if (offset != (bfd_vma) -1)
13809 {
13810 rel[1].r_info = ELF64_R_INFO (r_symndx,
13811 R_PPC64_TPREL16_LO);
13812 rel[1].r_offset = offset + d_offset;
13813 rel[1].r_addend = rel->r_addend;
13814 }
13815 }
13816 bfd_put_32 (output_bfd, insn1,
13817 contents + rel->r_offset - d_offset);
13818 if (offset != (bfd_vma) -1)
13819 {
13820 insn3 = bfd_get_32 (output_bfd,
13821 contents + offset + 4);
13822 if (insn3 == NOP
13823 || insn3 == CROR_151515 || insn3 == CROR_313131)
13824 {
13825 rel[1].r_offset += 4;
13826 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
13827 insn2 = NOP;
13828 }
13829 bfd_put_32 (output_bfd, insn2, contents + offset);
13830 }
13831 if ((tls_mask & tls_gd) == 0
13832 && (tls_gd == 0 || toc_symndx != 0))
13833 {
13834 /* We changed the symbol. Start over in order
13835 to get h, sym, sec etc. right. */
13836 goto again;
13837 }
13838 }
13839 break;
13840
13841 case R_PPC64_TLSGD:
13842 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13843 {
13844 unsigned int insn2, insn3;
13845 bfd_vma offset = rel->r_offset;
13846
13847 if ((tls_mask & TLS_TPRELGD) != 0)
13848 {
13849 /* IE */
13850 r_type = R_PPC64_NONE;
13851 insn2 = 0x7c636a14; /* add 3,3,13 */
13852 }
13853 else
13854 {
13855 /* LE */
13856 if (toc_symndx != 0)
13857 {
13858 r_symndx = toc_symndx;
13859 rel->r_addend = toc_addend;
13860 }
13861 r_type = R_PPC64_TPREL16_LO;
13862 rel->r_offset = offset + d_offset;
13863 insn2 = 0x38630000; /* addi 3,3,0 */
13864 }
13865 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13866 /* Zap the reloc on the _tls_get_addr call too. */
13867 BFD_ASSERT (offset == rel[1].r_offset);
13868 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13869 insn3 = bfd_get_32 (output_bfd,
13870 contents + offset + 4);
13871 if (insn3 == NOP
13872 || insn3 == CROR_151515 || insn3 == CROR_313131)
13873 {
13874 rel->r_offset += 4;
13875 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
13876 insn2 = NOP;
13877 }
13878 bfd_put_32 (output_bfd, insn2, contents + offset);
13879 if ((tls_mask & TLS_TPRELGD) == 0 && toc_symndx != 0)
13880 goto again;
13881 }
13882 break;
13883
13884 case R_PPC64_TLSLD:
13885 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13886 {
13887 unsigned int insn2, insn3;
13888 bfd_vma offset = rel->r_offset;
13889
13890 if (toc_symndx)
13891 sec = local_sections[toc_symndx];
13892 for (r_symndx = 0;
13893 r_symndx < symtab_hdr->sh_info;
13894 r_symndx++)
13895 if (local_sections[r_symndx] == sec)
13896 break;
13897 if (r_symndx >= symtab_hdr->sh_info)
13898 r_symndx = STN_UNDEF;
13899 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
13900 if (r_symndx != STN_UNDEF)
13901 rel->r_addend -= (local_syms[r_symndx].st_value
13902 + sec->output_offset
13903 + sec->output_section->vma);
13904
13905 r_type = R_PPC64_TPREL16_LO;
13906 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13907 rel->r_offset = offset + d_offset;
13908 /* Zap the reloc on the _tls_get_addr call too. */
13909 BFD_ASSERT (offset == rel[1].r_offset);
13910 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13911 insn2 = 0x38630000; /* addi 3,3,0 */
13912 insn3 = bfd_get_32 (output_bfd,
13913 contents + offset + 4);
13914 if (insn3 == NOP
13915 || insn3 == CROR_151515 || insn3 == CROR_313131)
13916 {
13917 rel->r_offset += 4;
13918 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
13919 insn2 = NOP;
13920 }
13921 bfd_put_32 (output_bfd, insn2, contents + offset);
13922 goto again;
13923 }
13924 break;
13925
13926 case R_PPC64_DTPMOD64:
13927 if (rel + 1 < relend
13928 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
13929 && rel[1].r_offset == rel->r_offset + 8)
13930 {
13931 if ((tls_mask & TLS_GD) == 0)
13932 {
13933 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
13934 if ((tls_mask & TLS_TPRELGD) != 0)
13935 r_type = R_PPC64_TPREL64;
13936 else
13937 {
13938 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
13939 r_type = R_PPC64_NONE;
13940 }
13941 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13942 }
13943 }
13944 else
13945 {
13946 if ((tls_mask & TLS_LD) == 0)
13947 {
13948 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
13949 r_type = R_PPC64_NONE;
13950 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13951 }
13952 }
13953 break;
13954
13955 case R_PPC64_TPREL64:
13956 if ((tls_mask & TLS_TPREL) == 0)
13957 {
13958 r_type = R_PPC64_NONE;
13959 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13960 }
13961 break;
13962
13963 case R_PPC64_ENTRY:
13964 relocation = TOCstart + htab->sec_info[input_section->id].toc_off;
13965 if (!bfd_link_pic (info)
13966 && !info->traditional_format
13967 && relocation + 0x80008000 <= 0xffffffff)
13968 {
13969 unsigned int insn1, insn2;
13970
13971 insn1 = bfd_get_32 (input_bfd, contents + rel->r_offset);
13972 insn2 = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
13973 if ((insn1 & ~0xfffc) == LD_R2_0R12
13974 && insn2 == ADD_R2_R2_R12)
13975 {
13976 bfd_put_32 (output_bfd,
13977 LIS_R2 + PPC_HA (relocation),
13978 contents + rel->r_offset);
13979 bfd_put_32 (output_bfd,
13980 ADDI_R2_R2 + PPC_LO (relocation),
13981 contents + rel->r_offset + 4);
13982 }
13983 }
13984 else
13985 {
13986 relocation -= (rel->r_offset
13987 + input_section->output_offset
13988 + input_section->output_section->vma);
13989 if (relocation + 0x80008000 <= 0xffffffff)
13990 {
13991 unsigned int insn1, insn2;
13992
13993 insn1 = bfd_get_32 (input_bfd, contents + rel->r_offset);
13994 insn2 = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
13995 if ((insn1 & ~0xfffc) == LD_R2_0R12
13996 && insn2 == ADD_R2_R2_R12)
13997 {
13998 bfd_put_32 (output_bfd,
13999 ADDIS_R2_R12 + PPC_HA (relocation),
14000 contents + rel->r_offset);
14001 bfd_put_32 (output_bfd,
14002 ADDI_R2_R2 + PPC_LO (relocation),
14003 contents + rel->r_offset + 4);
14004 }
14005 }
14006 }
14007 break;
14008
14009 case R_PPC64_REL16_HA:
14010 /* If we are generating a non-PIC executable, edit
14011 . 0: addis 2,12,.TOC.-0b@ha
14012 . addi 2,2,.TOC.-0b@l
14013 used by ELFv2 global entry points to set up r2, to
14014 . lis 2,.TOC.@ha
14015 . addi 2,2,.TOC.@l
14016 if .TOC. is in range. */
14017 if (!bfd_link_pic (info)
14018 && !info->traditional_format
14019 && !htab->opd_abi
14020 && rel->r_addend == d_offset
14021 && h != NULL && &h->elf == htab->elf.hgot
14022 && rel + 1 < relend
14023 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_REL16_LO)
14024 && rel[1].r_offset == rel->r_offset + 4
14025 && rel[1].r_addend == rel->r_addend + 4
14026 && relocation + 0x80008000 <= 0xffffffff)
14027 {
14028 unsigned int insn1, insn2;
14029 bfd_vma offset = rel->r_offset - d_offset;
14030 insn1 = bfd_get_32 (output_bfd, contents + offset);
14031 insn2 = bfd_get_32 (output_bfd, contents + offset + 4);
14032 if ((insn1 & 0xffff0000) == ADDIS_R2_R12
14033 && (insn2 & 0xffff0000) == ADDI_R2_R2)
14034 {
14035 r_type = R_PPC64_ADDR16_HA;
14036 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14037 rel->r_addend -= d_offset;
14038 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_ADDR16_LO);
14039 rel[1].r_addend -= d_offset + 4;
14040 bfd_put_32 (output_bfd, LIS_R2, contents + offset);
14041 }
14042 }
14043 break;
14044 }
14045
14046 /* Handle other relocations that tweak non-addend part of insn. */
14047 insn = 0;
14048 max_br_offset = 1 << 25;
14049 addend = rel->r_addend;
14050 reloc_dest = DEST_NORMAL;
14051 switch (r_type)
14052 {
14053 default:
14054 break;
14055
14056 case R_PPC64_TOCSAVE:
14057 if (relocation + addend == (rel->r_offset
14058 + input_section->output_offset
14059 + input_section->output_section->vma)
14060 && tocsave_find (htab, NO_INSERT,
14061 &local_syms, rel, input_bfd))
14062 {
14063 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
14064 if (insn == NOP
14065 || insn == CROR_151515 || insn == CROR_313131)
14066 bfd_put_32 (input_bfd,
14067 STD_R2_0R1 + STK_TOC (htab),
14068 contents + rel->r_offset);
14069 }
14070 break;
14071
14072 /* Branch taken prediction relocations. */
14073 case R_PPC64_ADDR14_BRTAKEN:
14074 case R_PPC64_REL14_BRTAKEN:
14075 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
14076 /* Fall thru. */
14077
14078 /* Branch not taken prediction relocations. */
14079 case R_PPC64_ADDR14_BRNTAKEN:
14080 case R_PPC64_REL14_BRNTAKEN:
14081 insn |= bfd_get_32 (output_bfd,
14082 contents + rel->r_offset) & ~(0x01 << 21);
14083 /* Fall thru. */
14084
14085 case R_PPC64_REL14:
14086 max_br_offset = 1 << 15;
14087 /* Fall thru. */
14088
14089 case R_PPC64_REL24:
14090 /* Calls to functions with a different TOC, such as calls to
14091 shared objects, need to alter the TOC pointer. This is
14092 done using a linkage stub. A REL24 branching to these
14093 linkage stubs needs to be followed by a nop, as the nop
14094 will be replaced with an instruction to restore the TOC
14095 base pointer. */
14096 fdh = h;
14097 if (h != NULL
14098 && h->oh != NULL
14099 && h->oh->is_func_descriptor)
14100 fdh = ppc_follow_link (h->oh);
14101 stub_entry = ppc_get_stub_entry (input_section, sec, fdh, &orig_rel,
14102 htab);
14103 if (stub_entry != NULL
14104 && (stub_entry->stub_type == ppc_stub_plt_call
14105 || stub_entry->stub_type == ppc_stub_plt_call_r2save
14106 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
14107 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
14108 {
14109 bfd_boolean can_plt_call = FALSE;
14110
14111 /* All of these stubs will modify r2, so there must be a
14112 branch and link followed by a nop. The nop is
14113 replaced by an insn to restore r2. */
14114 if (rel->r_offset + 8 <= input_section->size)
14115 {
14116 unsigned long br;
14117
14118 br = bfd_get_32 (input_bfd,
14119 contents + rel->r_offset);
14120 if ((br & 1) != 0)
14121 {
14122 unsigned long nop;
14123
14124 nop = bfd_get_32 (input_bfd,
14125 contents + rel->r_offset + 4);
14126 if (nop == NOP
14127 || nop == CROR_151515 || nop == CROR_313131)
14128 {
14129 if (h != NULL
14130 && (h == htab->tls_get_addr_fd
14131 || h == htab->tls_get_addr)
14132 && htab->params->tls_get_addr_opt)
14133 {
14134 /* Special stub used, leave nop alone. */
14135 }
14136 else
14137 bfd_put_32 (input_bfd,
14138 LD_R2_0R1 + STK_TOC (htab),
14139 contents + rel->r_offset + 4);
14140 can_plt_call = TRUE;
14141 }
14142 }
14143 }
14144
14145 if (!can_plt_call && h != NULL)
14146 {
14147 const char *name = h->elf.root.root.string;
14148
14149 if (*name == '.')
14150 ++name;
14151
14152 if (strncmp (name, "__libc_start_main", 17) == 0
14153 && (name[17] == 0 || name[17] == '@'))
14154 {
14155 /* Allow crt1 branch to go via a toc adjusting
14156 stub. Other calls that never return could do
14157 the same, if we could detect such. */
14158 can_plt_call = TRUE;
14159 }
14160 }
14161
14162 if (!can_plt_call)
14163 {
14164 /* g++ as of 20130507 emits self-calls without a
14165 following nop. This is arguably wrong since we
14166 have conflicting information. On the one hand a
14167 global symbol and on the other a local call
14168 sequence, but don't error for this special case.
14169 It isn't possible to cheaply verify we have
14170 exactly such a call. Allow all calls to the same
14171 section. */
14172 asection *code_sec = sec;
14173
14174 if (get_opd_info (sec) != NULL)
14175 {
14176 bfd_vma off = (relocation + addend
14177 - sec->output_section->vma
14178 - sec->output_offset);
14179
14180 opd_entry_value (sec, off, &code_sec, NULL, FALSE);
14181 }
14182 if (code_sec == input_section)
14183 can_plt_call = TRUE;
14184 }
14185
14186 if (!can_plt_call)
14187 {
14188 if (stub_entry->stub_type == ppc_stub_plt_call
14189 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14190 info->callbacks->einfo
14191 (_("%P: %H: call to `%T' lacks nop, can't restore toc; "
14192 "recompile with -fPIC\n"),
14193 input_bfd, input_section, rel->r_offset, sym_name);
14194 else
14195 info->callbacks->einfo
14196 (_("%P: %H: call to `%T' lacks nop, can't restore toc; "
14197 "(-mcmodel=small toc adjust stub)\n"),
14198 input_bfd, input_section, rel->r_offset, sym_name);
14199
14200 bfd_set_error (bfd_error_bad_value);
14201 ret = FALSE;
14202 }
14203
14204 if (can_plt_call
14205 && (stub_entry->stub_type == ppc_stub_plt_call
14206 || stub_entry->stub_type == ppc_stub_plt_call_r2save))
14207 unresolved_reloc = FALSE;
14208 }
14209
14210 if ((stub_entry == NULL
14211 || stub_entry->stub_type == ppc_stub_long_branch
14212 || stub_entry->stub_type == ppc_stub_plt_branch)
14213 && get_opd_info (sec) != NULL)
14214 {
14215 /* The branch destination is the value of the opd entry. */
14216 bfd_vma off = (relocation + addend
14217 - sec->output_section->vma
14218 - sec->output_offset);
14219 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL, FALSE);
14220 if (dest != (bfd_vma) -1)
14221 {
14222 relocation = dest;
14223 addend = 0;
14224 reloc_dest = DEST_OPD;
14225 }
14226 }
14227
14228 /* If the branch is out of reach we ought to have a long
14229 branch stub. */
14230 from = (rel->r_offset
14231 + input_section->output_offset
14232 + input_section->output_section->vma);
14233
14234 relocation += PPC64_LOCAL_ENTRY_OFFSET (fdh
14235 ? fdh->elf.other
14236 : sym->st_other);
14237
14238 if (stub_entry != NULL
14239 && (stub_entry->stub_type == ppc_stub_long_branch
14240 || stub_entry->stub_type == ppc_stub_plt_branch)
14241 && (r_type == R_PPC64_ADDR14_BRTAKEN
14242 || r_type == R_PPC64_ADDR14_BRNTAKEN
14243 || (relocation + addend - from + max_br_offset
14244 < 2 * max_br_offset)))
14245 /* Don't use the stub if this branch is in range. */
14246 stub_entry = NULL;
14247
14248 if (stub_entry != NULL)
14249 {
14250 /* Munge up the value and addend so that we call the stub
14251 rather than the procedure directly. */
14252 asection *stub_sec = stub_entry->group->stub_sec;
14253
14254 if (stub_entry->stub_type == ppc_stub_save_res)
14255 relocation += (stub_sec->output_offset
14256 + stub_sec->output_section->vma
14257 + stub_sec->size - htab->sfpr->size
14258 - htab->sfpr->output_offset
14259 - htab->sfpr->output_section->vma);
14260 else
14261 relocation = (stub_entry->stub_offset
14262 + stub_sec->output_offset
14263 + stub_sec->output_section->vma);
14264 addend = 0;
14265 reloc_dest = DEST_STUB;
14266
14267 if ((stub_entry->stub_type == ppc_stub_plt_call
14268 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14269 && (ALWAYS_EMIT_R2SAVE
14270 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14271 && rel + 1 < relend
14272 && rel[1].r_offset == rel->r_offset + 4
14273 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOCSAVE)
14274 relocation += 4;
14275 }
14276
14277 if (insn != 0)
14278 {
14279 if (is_isa_v2)
14280 {
14281 /* Set 'a' bit. This is 0b00010 in BO field for branch
14282 on CR(BI) insns (BO == 001at or 011at), and 0b01000
14283 for branch on CTR insns (BO == 1a00t or 1a01t). */
14284 if ((insn & (0x14 << 21)) == (0x04 << 21))
14285 insn |= 0x02 << 21;
14286 else if ((insn & (0x14 << 21)) == (0x10 << 21))
14287 insn |= 0x08 << 21;
14288 else
14289 break;
14290 }
14291 else
14292 {
14293 /* Invert 'y' bit if not the default. */
14294 if ((bfd_signed_vma) (relocation + addend - from) < 0)
14295 insn ^= 0x01 << 21;
14296 }
14297
14298 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
14299 }
14300
14301 /* NOP out calls to undefined weak functions.
14302 We can thus call a weak function without first
14303 checking whether the function is defined. */
14304 else if (h != NULL
14305 && h->elf.root.type == bfd_link_hash_undefweak
14306 && h->elf.dynindx == -1
14307 && r_type == R_PPC64_REL24
14308 && relocation == 0
14309 && addend == 0)
14310 {
14311 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
14312 goto copy_reloc;
14313 }
14314 break;
14315 }
14316
14317 /* Set `addend'. */
14318 tls_type = 0;
14319 switch (r_type)
14320 {
14321 default:
14322 info->callbacks->einfo
14323 (_("%P: %B: unknown relocation type %d for `%T'\n"),
14324 input_bfd, (int) r_type, sym_name);
14325
14326 bfd_set_error (bfd_error_bad_value);
14327 ret = FALSE;
14328 goto copy_reloc;
14329
14330 case R_PPC64_NONE:
14331 case R_PPC64_TLS:
14332 case R_PPC64_TLSGD:
14333 case R_PPC64_TLSLD:
14334 case R_PPC64_TOCSAVE:
14335 case R_PPC64_GNU_VTINHERIT:
14336 case R_PPC64_GNU_VTENTRY:
14337 case R_PPC64_ENTRY:
14338 goto copy_reloc;
14339
14340 /* GOT16 relocations. Like an ADDR16 using the symbol's
14341 address in the GOT as relocation value instead of the
14342 symbol's value itself. Also, create a GOT entry for the
14343 symbol and put the symbol value there. */
14344 case R_PPC64_GOT_TLSGD16:
14345 case R_PPC64_GOT_TLSGD16_LO:
14346 case R_PPC64_GOT_TLSGD16_HI:
14347 case R_PPC64_GOT_TLSGD16_HA:
14348 tls_type = TLS_TLS | TLS_GD;
14349 goto dogot;
14350
14351 case R_PPC64_GOT_TLSLD16:
14352 case R_PPC64_GOT_TLSLD16_LO:
14353 case R_PPC64_GOT_TLSLD16_HI:
14354 case R_PPC64_GOT_TLSLD16_HA:
14355 tls_type = TLS_TLS | TLS_LD;
14356 goto dogot;
14357
14358 case R_PPC64_GOT_TPREL16_DS:
14359 case R_PPC64_GOT_TPREL16_LO_DS:
14360 case R_PPC64_GOT_TPREL16_HI:
14361 case R_PPC64_GOT_TPREL16_HA:
14362 tls_type = TLS_TLS | TLS_TPREL;
14363 goto dogot;
14364
14365 case R_PPC64_GOT_DTPREL16_DS:
14366 case R_PPC64_GOT_DTPREL16_LO_DS:
14367 case R_PPC64_GOT_DTPREL16_HI:
14368 case R_PPC64_GOT_DTPREL16_HA:
14369 tls_type = TLS_TLS | TLS_DTPREL;
14370 goto dogot;
14371
14372 case R_PPC64_GOT16:
14373 case R_PPC64_GOT16_LO:
14374 case R_PPC64_GOT16_HI:
14375 case R_PPC64_GOT16_HA:
14376 case R_PPC64_GOT16_DS:
14377 case R_PPC64_GOT16_LO_DS:
14378 dogot:
14379 {
14380 /* Relocation is to the entry for this symbol in the global
14381 offset table. */
14382 asection *got;
14383 bfd_vma *offp;
14384 bfd_vma off;
14385 unsigned long indx = 0;
14386 struct got_entry *ent;
14387
14388 if (tls_type == (TLS_TLS | TLS_LD)
14389 && (h == NULL
14390 || !h->elf.def_dynamic))
14391 ent = ppc64_tlsld_got (input_bfd);
14392 else
14393 {
14394
14395 if (h != NULL)
14396 {
14397 bfd_boolean dyn = htab->elf.dynamic_sections_created;
14398 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, bfd_link_pic (info),
14399 &h->elf)
14400 || (bfd_link_pic (info)
14401 && SYMBOL_REFERENCES_LOCAL (info, &h->elf)))
14402 /* This is actually a static link, or it is a
14403 -Bsymbolic link and the symbol is defined
14404 locally, or the symbol was forced to be local
14405 because of a version file. */
14406 ;
14407 else
14408 {
14409 BFD_ASSERT (h->elf.dynindx != -1);
14410 indx = h->elf.dynindx;
14411 unresolved_reloc = FALSE;
14412 }
14413 ent = h->elf.got.glist;
14414 }
14415 else
14416 {
14417 if (local_got_ents == NULL)
14418 abort ();
14419 ent = local_got_ents[r_symndx];
14420 }
14421
14422 for (; ent != NULL; ent = ent->next)
14423 if (ent->addend == orig_rel.r_addend
14424 && ent->owner == input_bfd
14425 && ent->tls_type == tls_type)
14426 break;
14427 }
14428
14429 if (ent == NULL)
14430 abort ();
14431 if (ent->is_indirect)
14432 ent = ent->got.ent;
14433 offp = &ent->got.offset;
14434 got = ppc64_elf_tdata (ent->owner)->got;
14435 if (got == NULL)
14436 abort ();
14437
14438 /* The offset must always be a multiple of 8. We use the
14439 least significant bit to record whether we have already
14440 processed this entry. */
14441 off = *offp;
14442 if ((off & 1) != 0)
14443 off &= ~1;
14444 else
14445 {
14446 /* Generate relocs for the dynamic linker, except in
14447 the case of TLSLD where we'll use one entry per
14448 module. */
14449 asection *relgot;
14450 bfd_boolean ifunc;
14451
14452 *offp = off | 1;
14453 relgot = NULL;
14454 ifunc = (h != NULL
14455 ? h->elf.type == STT_GNU_IFUNC
14456 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC);
14457 if (ifunc)
14458 relgot = htab->elf.irelplt;
14459 else if ((bfd_link_pic (info) || indx != 0)
14460 && (h == NULL
14461 || (tls_type == (TLS_TLS | TLS_LD)
14462 && !h->elf.def_dynamic)
14463 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
14464 || h->elf.root.type != bfd_link_hash_undefweak))
14465 relgot = ppc64_elf_tdata (ent->owner)->relgot;
14466 if (relgot != NULL)
14467 {
14468 outrel.r_offset = (got->output_section->vma
14469 + got->output_offset
14470 + off);
14471 outrel.r_addend = addend;
14472 if (tls_type & (TLS_LD | TLS_GD))
14473 {
14474 outrel.r_addend = 0;
14475 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
14476 if (tls_type == (TLS_TLS | TLS_GD))
14477 {
14478 loc = relgot->contents;
14479 loc += (relgot->reloc_count++
14480 * sizeof (Elf64_External_Rela));
14481 bfd_elf64_swap_reloca_out (output_bfd,
14482 &outrel, loc);
14483 outrel.r_offset += 8;
14484 outrel.r_addend = addend;
14485 outrel.r_info
14486 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
14487 }
14488 }
14489 else if (tls_type == (TLS_TLS | TLS_DTPREL))
14490 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
14491 else if (tls_type == (TLS_TLS | TLS_TPREL))
14492 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
14493 else if (indx != 0)
14494 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
14495 else
14496 {
14497 if (ifunc)
14498 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
14499 else
14500 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
14501
14502 /* Write the .got section contents for the sake
14503 of prelink. */
14504 loc = got->contents + off;
14505 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
14506 loc);
14507 }
14508
14509 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
14510 {
14511 outrel.r_addend += relocation;
14512 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
14513 {
14514 if (htab->elf.tls_sec == NULL)
14515 outrel.r_addend = 0;
14516 else
14517 outrel.r_addend -= htab->elf.tls_sec->vma;
14518 }
14519 }
14520 loc = relgot->contents;
14521 loc += (relgot->reloc_count++
14522 * sizeof (Elf64_External_Rela));
14523 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
14524 }
14525
14526 /* Init the .got section contents here if we're not
14527 emitting a reloc. */
14528 else
14529 {
14530 relocation += addend;
14531 if (tls_type == (TLS_TLS | TLS_LD))
14532 relocation = 1;
14533 else if (tls_type != 0)
14534 {
14535 if (htab->elf.tls_sec == NULL)
14536 relocation = 0;
14537 else
14538 {
14539 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
14540 if (tls_type == (TLS_TLS | TLS_TPREL))
14541 relocation += DTP_OFFSET - TP_OFFSET;
14542 }
14543
14544 if (tls_type == (TLS_TLS | TLS_GD))
14545 {
14546 bfd_put_64 (output_bfd, relocation,
14547 got->contents + off + 8);
14548 relocation = 1;
14549 }
14550 }
14551
14552 bfd_put_64 (output_bfd, relocation,
14553 got->contents + off);
14554 }
14555 }
14556
14557 if (off >= (bfd_vma) -2)
14558 abort ();
14559
14560 relocation = got->output_section->vma + got->output_offset + off;
14561 addend = -(TOCstart + htab->sec_info[input_section->id].toc_off);
14562 }
14563 break;
14564
14565 case R_PPC64_PLT16_HA:
14566 case R_PPC64_PLT16_HI:
14567 case R_PPC64_PLT16_LO:
14568 case R_PPC64_PLT32:
14569 case R_PPC64_PLT64:
14570 /* Relocation is to the entry for this symbol in the
14571 procedure linkage table. */
14572 {
14573 struct plt_entry **plt_list = NULL;
14574 if (h != NULL)
14575 plt_list = &h->elf.plt.plist;
14576 else if (local_got_ents != NULL)
14577 {
14578 struct plt_entry **local_plt = (struct plt_entry **)
14579 (local_got_ents + symtab_hdr->sh_info);
14580 unsigned char *local_got_tls_masks = (unsigned char *)
14581 (local_plt + symtab_hdr->sh_info);
14582 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
14583 plt_list = local_plt + r_symndx;
14584 }
14585 if (plt_list)
14586 {
14587 struct plt_entry *ent;
14588
14589 for (ent = *plt_list; ent != NULL; ent = ent->next)
14590 if (ent->plt.offset != (bfd_vma) -1
14591 && ent->addend == orig_rel.r_addend)
14592 {
14593 asection *plt;
14594
14595 plt = htab->elf.splt;
14596 if (!htab->elf.dynamic_sections_created
14597 || h == NULL
14598 || h->elf.dynindx == -1)
14599 plt = htab->elf.iplt;
14600 relocation = (plt->output_section->vma
14601 + plt->output_offset
14602 + ent->plt.offset);
14603 addend = 0;
14604 unresolved_reloc = FALSE;
14605 break;
14606 }
14607 }
14608 }
14609 break;
14610
14611 case R_PPC64_TOC:
14612 /* Relocation value is TOC base. */
14613 relocation = TOCstart;
14614 if (r_symndx == STN_UNDEF)
14615 relocation += htab->sec_info[input_section->id].toc_off;
14616 else if (unresolved_reloc)
14617 ;
14618 else if (sec != NULL && sec->id < htab->sec_info_arr_size)
14619 relocation += htab->sec_info[sec->id].toc_off;
14620 else
14621 unresolved_reloc = TRUE;
14622 goto dodyn;
14623
14624 /* TOC16 relocs. We want the offset relative to the TOC base,
14625 which is the address of the start of the TOC plus 0x8000.
14626 The TOC consists of sections .got, .toc, .tocbss, and .plt,
14627 in this order. */
14628 case R_PPC64_TOC16:
14629 case R_PPC64_TOC16_LO:
14630 case R_PPC64_TOC16_HI:
14631 case R_PPC64_TOC16_DS:
14632 case R_PPC64_TOC16_LO_DS:
14633 case R_PPC64_TOC16_HA:
14634 addend -= TOCstart + htab->sec_info[input_section->id].toc_off;
14635 break;
14636
14637 /* Relocate against the beginning of the section. */
14638 case R_PPC64_SECTOFF:
14639 case R_PPC64_SECTOFF_LO:
14640 case R_PPC64_SECTOFF_HI:
14641 case R_PPC64_SECTOFF_DS:
14642 case R_PPC64_SECTOFF_LO_DS:
14643 case R_PPC64_SECTOFF_HA:
14644 if (sec != NULL)
14645 addend -= sec->output_section->vma;
14646 break;
14647
14648 case R_PPC64_REL16:
14649 case R_PPC64_REL16_LO:
14650 case R_PPC64_REL16_HI:
14651 case R_PPC64_REL16_HA:
14652 case R_PPC64_REL16DX_HA:
14653 break;
14654
14655 case R_PPC64_REL14:
14656 case R_PPC64_REL14_BRNTAKEN:
14657 case R_PPC64_REL14_BRTAKEN:
14658 case R_PPC64_REL24:
14659 break;
14660
14661 case R_PPC64_TPREL16:
14662 case R_PPC64_TPREL16_LO:
14663 case R_PPC64_TPREL16_HI:
14664 case R_PPC64_TPREL16_HA:
14665 case R_PPC64_TPREL16_DS:
14666 case R_PPC64_TPREL16_LO_DS:
14667 case R_PPC64_TPREL16_HIGH:
14668 case R_PPC64_TPREL16_HIGHA:
14669 case R_PPC64_TPREL16_HIGHER:
14670 case R_PPC64_TPREL16_HIGHERA:
14671 case R_PPC64_TPREL16_HIGHEST:
14672 case R_PPC64_TPREL16_HIGHESTA:
14673 if (h != NULL
14674 && h->elf.root.type == bfd_link_hash_undefweak
14675 && h->elf.dynindx == -1)
14676 {
14677 /* Make this relocation against an undefined weak symbol
14678 resolve to zero. This is really just a tweak, since
14679 code using weak externs ought to check that they are
14680 defined before using them. */
14681 bfd_byte *p = contents + rel->r_offset - d_offset;
14682
14683 insn = bfd_get_32 (output_bfd, p);
14684 insn = _bfd_elf_ppc_at_tprel_transform (insn, 13);
14685 if (insn != 0)
14686 bfd_put_32 (output_bfd, insn, p);
14687 break;
14688 }
14689 if (htab->elf.tls_sec != NULL)
14690 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
14691 if (bfd_link_pic (info))
14692 /* The TPREL16 relocs shouldn't really be used in shared
14693 libs as they will result in DT_TEXTREL being set, but
14694 support them anyway. */
14695 goto dodyn;
14696 break;
14697
14698 case R_PPC64_DTPREL16:
14699 case R_PPC64_DTPREL16_LO:
14700 case R_PPC64_DTPREL16_HI:
14701 case R_PPC64_DTPREL16_HA:
14702 case R_PPC64_DTPREL16_DS:
14703 case R_PPC64_DTPREL16_LO_DS:
14704 case R_PPC64_DTPREL16_HIGH:
14705 case R_PPC64_DTPREL16_HIGHA:
14706 case R_PPC64_DTPREL16_HIGHER:
14707 case R_PPC64_DTPREL16_HIGHERA:
14708 case R_PPC64_DTPREL16_HIGHEST:
14709 case R_PPC64_DTPREL16_HIGHESTA:
14710 if (htab->elf.tls_sec != NULL)
14711 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
14712 break;
14713
14714 case R_PPC64_ADDR64_LOCAL:
14715 addend += PPC64_LOCAL_ENTRY_OFFSET (h != NULL
14716 ? h->elf.other
14717 : sym->st_other);
14718 break;
14719
14720 case R_PPC64_DTPMOD64:
14721 relocation = 1;
14722 addend = 0;
14723 goto dodyn;
14724
14725 case R_PPC64_TPREL64:
14726 if (htab->elf.tls_sec != NULL)
14727 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
14728 goto dodyn;
14729
14730 case R_PPC64_DTPREL64:
14731 if (htab->elf.tls_sec != NULL)
14732 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
14733 /* Fall thru */
14734
14735 /* Relocations that may need to be propagated if this is a
14736 dynamic object. */
14737 case R_PPC64_REL30:
14738 case R_PPC64_REL32:
14739 case R_PPC64_REL64:
14740 case R_PPC64_ADDR14:
14741 case R_PPC64_ADDR14_BRNTAKEN:
14742 case R_PPC64_ADDR14_BRTAKEN:
14743 case R_PPC64_ADDR16:
14744 case R_PPC64_ADDR16_DS:
14745 case R_PPC64_ADDR16_HA:
14746 case R_PPC64_ADDR16_HI:
14747 case R_PPC64_ADDR16_HIGH:
14748 case R_PPC64_ADDR16_HIGHA:
14749 case R_PPC64_ADDR16_HIGHER:
14750 case R_PPC64_ADDR16_HIGHERA:
14751 case R_PPC64_ADDR16_HIGHEST:
14752 case R_PPC64_ADDR16_HIGHESTA:
14753 case R_PPC64_ADDR16_LO:
14754 case R_PPC64_ADDR16_LO_DS:
14755 case R_PPC64_ADDR24:
14756 case R_PPC64_ADDR32:
14757 case R_PPC64_ADDR64:
14758 case R_PPC64_UADDR16:
14759 case R_PPC64_UADDR32:
14760 case R_PPC64_UADDR64:
14761 dodyn:
14762 if ((input_section->flags & SEC_ALLOC) == 0)
14763 break;
14764
14765 if (NO_OPD_RELOCS && is_opd)
14766 break;
14767
14768 if (bfd_link_pic (info)
14769 ? ((h != NULL && pc_dynrelocs (h))
14770 || must_be_dyn_reloc (info, r_type))
14771 : (h != NULL
14772 ? h->dyn_relocs != NULL
14773 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
14774 {
14775 bfd_boolean skip, relocate;
14776 asection *sreloc;
14777 bfd_vma out_off;
14778
14779 /* When generating a dynamic object, these relocations
14780 are copied into the output file to be resolved at run
14781 time. */
14782
14783 skip = FALSE;
14784 relocate = FALSE;
14785
14786 out_off = _bfd_elf_section_offset (output_bfd, info,
14787 input_section, rel->r_offset);
14788 if (out_off == (bfd_vma) -1)
14789 skip = TRUE;
14790 else if (out_off == (bfd_vma) -2)
14791 skip = TRUE, relocate = TRUE;
14792 out_off += (input_section->output_section->vma
14793 + input_section->output_offset);
14794 outrel.r_offset = out_off;
14795 outrel.r_addend = rel->r_addend;
14796
14797 /* Optimize unaligned reloc use. */
14798 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
14799 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
14800 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
14801 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
14802 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
14803 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
14804 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
14805 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
14806 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
14807
14808 if (skip)
14809 memset (&outrel, 0, sizeof outrel);
14810 else if (!SYMBOL_REFERENCES_LOCAL (info, &h->elf)
14811 && !is_opd
14812 && r_type != R_PPC64_TOC)
14813 {
14814 BFD_ASSERT (h->elf.dynindx != -1);
14815 outrel.r_info = ELF64_R_INFO (h->elf.dynindx, r_type);
14816 }
14817 else
14818 {
14819 /* This symbol is local, or marked to become local,
14820 or this is an opd section reloc which must point
14821 at a local function. */
14822 outrel.r_addend += relocation;
14823 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
14824 {
14825 if (is_opd && h != NULL)
14826 {
14827 /* Lie about opd entries. This case occurs
14828 when building shared libraries and we
14829 reference a function in another shared
14830 lib. The same thing happens for a weak
14831 definition in an application that's
14832 overridden by a strong definition in a
14833 shared lib. (I believe this is a generic
14834 bug in binutils handling of weak syms.)
14835 In these cases we won't use the opd
14836 entry in this lib. */
14837 unresolved_reloc = FALSE;
14838 }
14839 if (!is_opd
14840 && r_type == R_PPC64_ADDR64
14841 && (h != NULL
14842 ? h->elf.type == STT_GNU_IFUNC
14843 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
14844 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
14845 else
14846 {
14847 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
14848
14849 /* We need to relocate .opd contents for ld.so.
14850 Prelink also wants simple and consistent rules
14851 for relocs. This make all RELATIVE relocs have
14852 *r_offset equal to r_addend. */
14853 relocate = TRUE;
14854 }
14855 }
14856 else
14857 {
14858 long indx = 0;
14859
14860 if (h != NULL
14861 ? h->elf.type == STT_GNU_IFUNC
14862 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
14863 {
14864 info->callbacks->einfo
14865 (_("%P: %H: %s for indirect "
14866 "function `%T' unsupported\n"),
14867 input_bfd, input_section, rel->r_offset,
14868 ppc64_elf_howto_table[r_type]->name,
14869 sym_name);
14870 ret = FALSE;
14871 }
14872 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
14873 ;
14874 else if (sec == NULL || sec->owner == NULL)
14875 {
14876 bfd_set_error (bfd_error_bad_value);
14877 return FALSE;
14878 }
14879 else
14880 {
14881 asection *osec;
14882
14883 osec = sec->output_section;
14884 indx = elf_section_data (osec)->dynindx;
14885
14886 if (indx == 0)
14887 {
14888 if ((osec->flags & SEC_READONLY) == 0
14889 && htab->elf.data_index_section != NULL)
14890 osec = htab->elf.data_index_section;
14891 else
14892 osec = htab->elf.text_index_section;
14893 indx = elf_section_data (osec)->dynindx;
14894 }
14895 BFD_ASSERT (indx != 0);
14896
14897 /* We are turning this relocation into one
14898 against a section symbol, so subtract out
14899 the output section's address but not the
14900 offset of the input section in the output
14901 section. */
14902 outrel.r_addend -= osec->vma;
14903 }
14904
14905 outrel.r_info = ELF64_R_INFO (indx, r_type);
14906 }
14907 }
14908
14909 sreloc = elf_section_data (input_section)->sreloc;
14910 if (h != NULL
14911 ? h->elf.type == STT_GNU_IFUNC
14912 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
14913 sreloc = htab->elf.irelplt;
14914 if (sreloc == NULL)
14915 abort ();
14916
14917 if (sreloc->reloc_count * sizeof (Elf64_External_Rela)
14918 >= sreloc->size)
14919 abort ();
14920 loc = sreloc->contents;
14921 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
14922 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
14923
14924 /* If this reloc is against an external symbol, it will
14925 be computed at runtime, so there's no need to do
14926 anything now. However, for the sake of prelink ensure
14927 that the section contents are a known value. */
14928 if (! relocate)
14929 {
14930 unresolved_reloc = FALSE;
14931 /* The value chosen here is quite arbitrary as ld.so
14932 ignores section contents except for the special
14933 case of .opd where the contents might be accessed
14934 before relocation. Choose zero, as that won't
14935 cause reloc overflow. */
14936 relocation = 0;
14937 addend = 0;
14938 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
14939 to improve backward compatibility with older
14940 versions of ld. */
14941 if (r_type == R_PPC64_ADDR64)
14942 addend = outrel.r_addend;
14943 /* Adjust pc_relative relocs to have zero in *r_offset. */
14944 else if (ppc64_elf_howto_table[r_type]->pc_relative)
14945 addend = (input_section->output_section->vma
14946 + input_section->output_offset
14947 + rel->r_offset);
14948 }
14949 }
14950 break;
14951
14952 case R_PPC64_COPY:
14953 case R_PPC64_GLOB_DAT:
14954 case R_PPC64_JMP_SLOT:
14955 case R_PPC64_JMP_IREL:
14956 case R_PPC64_RELATIVE:
14957 /* We shouldn't ever see these dynamic relocs in relocatable
14958 files. */
14959 /* Fall through. */
14960
14961 case R_PPC64_PLTGOT16:
14962 case R_PPC64_PLTGOT16_DS:
14963 case R_PPC64_PLTGOT16_HA:
14964 case R_PPC64_PLTGOT16_HI:
14965 case R_PPC64_PLTGOT16_LO:
14966 case R_PPC64_PLTGOT16_LO_DS:
14967 case R_PPC64_PLTREL32:
14968 case R_PPC64_PLTREL64:
14969 /* These ones haven't been implemented yet. */
14970
14971 info->callbacks->einfo
14972 (_("%P: %B: %s is not supported for `%T'\n"),
14973 input_bfd,
14974 ppc64_elf_howto_table[r_type]->name, sym_name);
14975
14976 bfd_set_error (bfd_error_invalid_operation);
14977 ret = FALSE;
14978 goto copy_reloc;
14979 }
14980
14981 /* Multi-instruction sequences that access the TOC can be
14982 optimized, eg. addis ra,r2,0; addi rb,ra,x;
14983 to nop; addi rb,r2,x; */
14984 switch (r_type)
14985 {
14986 default:
14987 break;
14988
14989 case R_PPC64_GOT_TLSLD16_HI:
14990 case R_PPC64_GOT_TLSGD16_HI:
14991 case R_PPC64_GOT_TPREL16_HI:
14992 case R_PPC64_GOT_DTPREL16_HI:
14993 case R_PPC64_GOT16_HI:
14994 case R_PPC64_TOC16_HI:
14995 /* These relocs would only be useful if building up an
14996 offset to later add to r2, perhaps in an indexed
14997 addressing mode instruction. Don't try to optimize.
14998 Unfortunately, the possibility of someone building up an
14999 offset like this or even with the HA relocs, means that
15000 we need to check the high insn when optimizing the low
15001 insn. */
15002 break;
15003
15004 case R_PPC64_GOT_TLSLD16_HA:
15005 case R_PPC64_GOT_TLSGD16_HA:
15006 case R_PPC64_GOT_TPREL16_HA:
15007 case R_PPC64_GOT_DTPREL16_HA:
15008 case R_PPC64_GOT16_HA:
15009 case R_PPC64_TOC16_HA:
15010 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
15011 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
15012 {
15013 bfd_byte *p = contents + (rel->r_offset & ~3);
15014 bfd_put_32 (input_bfd, NOP, p);
15015 }
15016 break;
15017
15018 case R_PPC64_GOT_TLSLD16_LO:
15019 case R_PPC64_GOT_TLSGD16_LO:
15020 case R_PPC64_GOT_TPREL16_LO_DS:
15021 case R_PPC64_GOT_DTPREL16_LO_DS:
15022 case R_PPC64_GOT16_LO:
15023 case R_PPC64_GOT16_LO_DS:
15024 case R_PPC64_TOC16_LO:
15025 case R_PPC64_TOC16_LO_DS:
15026 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
15027 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
15028 {
15029 bfd_byte *p = contents + (rel->r_offset & ~3);
15030 insn = bfd_get_32 (input_bfd, p);
15031 if ((insn & (0x3f << 26)) == 12u << 26 /* addic */)
15032 {
15033 /* Transform addic to addi when we change reg. */
15034 insn &= ~((0x3f << 26) | (0x1f << 16));
15035 insn |= (14u << 26) | (2 << 16);
15036 }
15037 else
15038 {
15039 insn &= ~(0x1f << 16);
15040 insn |= 2 << 16;
15041 }
15042 bfd_put_32 (input_bfd, insn, p);
15043 }
15044 break;
15045 }
15046
15047 /* Do any further special processing. */
15048 howto = ppc64_elf_howto_table[(int) r_type];
15049 switch (r_type)
15050 {
15051 default:
15052 break;
15053
15054 case R_PPC64_REL16_HA:
15055 case R_PPC64_REL16DX_HA:
15056 case R_PPC64_ADDR16_HA:
15057 case R_PPC64_ADDR16_HIGHA:
15058 case R_PPC64_ADDR16_HIGHERA:
15059 case R_PPC64_ADDR16_HIGHESTA:
15060 case R_PPC64_TOC16_HA:
15061 case R_PPC64_SECTOFF_HA:
15062 case R_PPC64_TPREL16_HA:
15063 case R_PPC64_TPREL16_HIGHA:
15064 case R_PPC64_TPREL16_HIGHERA:
15065 case R_PPC64_TPREL16_HIGHESTA:
15066 case R_PPC64_DTPREL16_HA:
15067 case R_PPC64_DTPREL16_HIGHA:
15068 case R_PPC64_DTPREL16_HIGHERA:
15069 case R_PPC64_DTPREL16_HIGHESTA:
15070 /* It's just possible that this symbol is a weak symbol
15071 that's not actually defined anywhere. In that case,
15072 'sec' would be NULL, and we should leave the symbol
15073 alone (it will be set to zero elsewhere in the link). */
15074 if (sec == NULL)
15075 break;
15076 /* Fall thru */
15077
15078 case R_PPC64_GOT16_HA:
15079 case R_PPC64_PLTGOT16_HA:
15080 case R_PPC64_PLT16_HA:
15081 case R_PPC64_GOT_TLSGD16_HA:
15082 case R_PPC64_GOT_TLSLD16_HA:
15083 case R_PPC64_GOT_TPREL16_HA:
15084 case R_PPC64_GOT_DTPREL16_HA:
15085 /* Add 0x10000 if sign bit in 0:15 is set.
15086 Bits 0:15 are not used. */
15087 addend += 0x8000;
15088 break;
15089
15090 case R_PPC64_ADDR16_DS:
15091 case R_PPC64_ADDR16_LO_DS:
15092 case R_PPC64_GOT16_DS:
15093 case R_PPC64_GOT16_LO_DS:
15094 case R_PPC64_PLT16_LO_DS:
15095 case R_PPC64_SECTOFF_DS:
15096 case R_PPC64_SECTOFF_LO_DS:
15097 case R_PPC64_TOC16_DS:
15098 case R_PPC64_TOC16_LO_DS:
15099 case R_PPC64_PLTGOT16_DS:
15100 case R_PPC64_PLTGOT16_LO_DS:
15101 case R_PPC64_GOT_TPREL16_DS:
15102 case R_PPC64_GOT_TPREL16_LO_DS:
15103 case R_PPC64_GOT_DTPREL16_DS:
15104 case R_PPC64_GOT_DTPREL16_LO_DS:
15105 case R_PPC64_TPREL16_DS:
15106 case R_PPC64_TPREL16_LO_DS:
15107 case R_PPC64_DTPREL16_DS:
15108 case R_PPC64_DTPREL16_LO_DS:
15109 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
15110 mask = 3;
15111 /* If this reloc is against an lq, lxv, or stxv insn, then
15112 the value must be a multiple of 16. This is somewhat of
15113 a hack, but the "correct" way to do this by defining _DQ
15114 forms of all the _DS relocs bloats all reloc switches in
15115 this file. It doesn't make much sense to use these
15116 relocs in data, so testing the insn should be safe. */
15117 if ((insn & (0x3f << 26)) == (56u << 26)
15118 || ((insn & (0x3f << 26)) == (61u << 26) && (insn & 3) == 1))
15119 mask = 15;
15120 relocation += addend;
15121 addend = insn & (mask ^ 3);
15122 if ((relocation & mask) != 0)
15123 {
15124 relocation ^= relocation & mask;
15125 info->callbacks->einfo
15126 (_("%P: %H: error: %s not a multiple of %u\n"),
15127 input_bfd, input_section, rel->r_offset,
15128 howto->name,
15129 mask + 1);
15130 bfd_set_error (bfd_error_bad_value);
15131 ret = FALSE;
15132 goto copy_reloc;
15133 }
15134 break;
15135 }
15136
15137 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
15138 because such sections are not SEC_ALLOC and thus ld.so will
15139 not process them. */
15140 if (unresolved_reloc
15141 && !((input_section->flags & SEC_DEBUGGING) != 0
15142 && h->elf.def_dynamic)
15143 && _bfd_elf_section_offset (output_bfd, info, input_section,
15144 rel->r_offset) != (bfd_vma) -1)
15145 {
15146 info->callbacks->einfo
15147 (_("%P: %H: unresolvable %s against `%T'\n"),
15148 input_bfd, input_section, rel->r_offset,
15149 howto->name,
15150 h->elf.root.root.string);
15151 ret = FALSE;
15152 }
15153
15154 /* 16-bit fields in insns mostly have signed values, but a
15155 few insns have 16-bit unsigned values. Really, we should
15156 have different reloc types. */
15157 if (howto->complain_on_overflow != complain_overflow_dont
15158 && howto->dst_mask == 0xffff
15159 && (input_section->flags & SEC_CODE) != 0)
15160 {
15161 enum complain_overflow complain = complain_overflow_signed;
15162
15163 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
15164 if ((insn & (0x3f << 26)) == 10u << 26 /* cmpli */)
15165 complain = complain_overflow_bitfield;
15166 else if (howto->rightshift == 0
15167 ? ((insn & (0x3f << 26)) == 28u << 26 /* andi */
15168 || (insn & (0x3f << 26)) == 24u << 26 /* ori */
15169 || (insn & (0x3f << 26)) == 26u << 26 /* xori */)
15170 : ((insn & (0x3f << 26)) == 29u << 26 /* andis */
15171 || (insn & (0x3f << 26)) == 25u << 26 /* oris */
15172 || (insn & (0x3f << 26)) == 27u << 26 /* xoris */))
15173 complain = complain_overflow_unsigned;
15174 if (howto->complain_on_overflow != complain)
15175 {
15176 alt_howto = *howto;
15177 alt_howto.complain_on_overflow = complain;
15178 howto = &alt_howto;
15179 }
15180 }
15181
15182 if (r_type == R_PPC64_REL16DX_HA)
15183 {
15184 /* Split field reloc isn't handled by _bfd_final_link_relocate. */
15185 if (rel->r_offset + 4 > input_section->size)
15186 r = bfd_reloc_outofrange;
15187 else
15188 {
15189 relocation += addend;
15190 relocation -= (rel->r_offset
15191 + input_section->output_offset
15192 + input_section->output_section->vma);
15193 relocation = (bfd_signed_vma) relocation >> 16;
15194 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
15195 insn &= ~0x1fffc1;
15196 insn |= (relocation & 0xffc1) | ((relocation & 0x3e) << 15);
15197 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
15198 r = bfd_reloc_ok;
15199 if (relocation + 0x8000 > 0xffff)
15200 r = bfd_reloc_overflow;
15201 }
15202 }
15203 else
15204 r = _bfd_final_link_relocate (howto, input_bfd, input_section, contents,
15205 rel->r_offset, relocation, addend);
15206
15207 if (r != bfd_reloc_ok)
15208 {
15209 char *more_info = NULL;
15210 const char *reloc_name = howto->name;
15211
15212 if (reloc_dest != DEST_NORMAL)
15213 {
15214 more_info = bfd_malloc (strlen (reloc_name) + 8);
15215 if (more_info != NULL)
15216 {
15217 strcpy (more_info, reloc_name);
15218 strcat (more_info, (reloc_dest == DEST_OPD
15219 ? " (OPD)" : " (stub)"));
15220 reloc_name = more_info;
15221 }
15222 }
15223
15224 if (r == bfd_reloc_overflow)
15225 {
15226 /* On code like "if (foo) foo();" don't report overflow
15227 on a branch to zero when foo is undefined. */
15228 if (!warned
15229 && (reloc_dest == DEST_STUB
15230 || !(h != NULL
15231 && (h->elf.root.type == bfd_link_hash_undefweak
15232 || h->elf.root.type == bfd_link_hash_undefined)
15233 && is_branch_reloc (r_type))))
15234 info->callbacks->reloc_overflow (info, &h->elf.root,
15235 sym_name, reloc_name,
15236 orig_rel.r_addend,
15237 input_bfd, input_section,
15238 rel->r_offset);
15239 }
15240 else
15241 {
15242 info->callbacks->einfo
15243 (_("%P: %H: %s against `%T': error %d\n"),
15244 input_bfd, input_section, rel->r_offset,
15245 reloc_name, sym_name, (int) r);
15246 ret = FALSE;
15247 }
15248 if (more_info != NULL)
15249 free (more_info);
15250 }
15251 copy_reloc:
15252 if (wrel != rel)
15253 *wrel = *rel;
15254 }
15255
15256 if (wrel != rel)
15257 {
15258 Elf_Internal_Shdr *rel_hdr;
15259 size_t deleted = rel - wrel;
15260
15261 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
15262 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
15263 if (rel_hdr->sh_size == 0)
15264 {
15265 /* It is too late to remove an empty reloc section. Leave
15266 one NONE reloc.
15267 ??? What is wrong with an empty section??? */
15268 rel_hdr->sh_size = rel_hdr->sh_entsize;
15269 deleted -= 1;
15270 }
15271 rel_hdr = _bfd_elf_single_rel_hdr (input_section);
15272 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
15273 input_section->reloc_count -= deleted;
15274 }
15275
15276 /* If we're emitting relocations, then shortly after this function
15277 returns, reloc offsets and addends for this section will be
15278 adjusted. Worse, reloc symbol indices will be for the output
15279 file rather than the input. Save a copy of the relocs for
15280 opd_entry_value. */
15281 if (is_opd && (info->emitrelocations || bfd_link_relocatable (info)))
15282 {
15283 bfd_size_type amt;
15284 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
15285 rel = bfd_alloc (input_bfd, amt);
15286 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd.relocs == NULL);
15287 ppc64_elf_tdata (input_bfd)->opd.relocs = rel;
15288 if (rel == NULL)
15289 return FALSE;
15290 memcpy (rel, relocs, amt);
15291 }
15292 return ret;
15293 }
15294
15295 /* Adjust the value of any local symbols in opd sections. */
15296
15297 static int
15298 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
15299 const char *name ATTRIBUTE_UNUSED,
15300 Elf_Internal_Sym *elfsym,
15301 asection *input_sec,
15302 struct elf_link_hash_entry *h)
15303 {
15304 struct _opd_sec_data *opd;
15305 long adjust;
15306 bfd_vma value;
15307
15308 if (h != NULL)
15309 return 1;
15310
15311 opd = get_opd_info (input_sec);
15312 if (opd == NULL || opd->adjust == NULL)
15313 return 1;
15314
15315 value = elfsym->st_value - input_sec->output_offset;
15316 if (!bfd_link_relocatable (info))
15317 value -= input_sec->output_section->vma;
15318
15319 adjust = opd->adjust[OPD_NDX (value)];
15320 if (adjust == -1)
15321 return 2;
15322
15323 elfsym->st_value += adjust;
15324 return 1;
15325 }
15326
15327 /* Finish up dynamic symbol handling. We set the contents of various
15328 dynamic sections here. */
15329
15330 static bfd_boolean
15331 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
15332 struct bfd_link_info *info,
15333 struct elf_link_hash_entry *h,
15334 Elf_Internal_Sym *sym ATTRIBUTE_UNUSED)
15335 {
15336 struct ppc_link_hash_table *htab;
15337 struct plt_entry *ent;
15338 Elf_Internal_Rela rela;
15339 bfd_byte *loc;
15340
15341 htab = ppc_hash_table (info);
15342 if (htab == NULL)
15343 return FALSE;
15344
15345 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
15346 if (ent->plt.offset != (bfd_vma) -1)
15347 {
15348 /* This symbol has an entry in the procedure linkage
15349 table. Set it up. */
15350 if (!htab->elf.dynamic_sections_created
15351 || h->dynindx == -1)
15352 {
15353 BFD_ASSERT (h->type == STT_GNU_IFUNC
15354 && h->def_regular
15355 && (h->root.type == bfd_link_hash_defined
15356 || h->root.type == bfd_link_hash_defweak));
15357 rela.r_offset = (htab->elf.iplt->output_section->vma
15358 + htab->elf.iplt->output_offset
15359 + ent->plt.offset);
15360 if (htab->opd_abi)
15361 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
15362 else
15363 rela.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
15364 rela.r_addend = (h->root.u.def.value
15365 + h->root.u.def.section->output_offset
15366 + h->root.u.def.section->output_section->vma
15367 + ent->addend);
15368 loc = (htab->elf.irelplt->contents
15369 + (htab->elf.irelplt->reloc_count++
15370 * sizeof (Elf64_External_Rela)));
15371 }
15372 else
15373 {
15374 rela.r_offset = (htab->elf.splt->output_section->vma
15375 + htab->elf.splt->output_offset
15376 + ent->plt.offset);
15377 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
15378 rela.r_addend = ent->addend;
15379 loc = (htab->elf.srelplt->contents
15380 + ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE (htab))
15381 / PLT_ENTRY_SIZE (htab) * sizeof (Elf64_External_Rela)));
15382 }
15383 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
15384
15385 if (!htab->opd_abi)
15386 {
15387 if (!h->def_regular)
15388 {
15389 /* Mark the symbol as undefined, rather than as
15390 defined in glink. Leave the value if there were
15391 any relocations where pointer equality matters
15392 (this is a clue for the dynamic linker, to make
15393 function pointer comparisons work between an
15394 application and shared library), otherwise set it
15395 to zero. */
15396 sym->st_shndx = SHN_UNDEF;
15397 if (!h->pointer_equality_needed)
15398 sym->st_value = 0;
15399 else if (!h->ref_regular_nonweak)
15400 {
15401 /* This breaks function pointer comparisons, but
15402 that is better than breaking tests for a NULL
15403 function pointer. */
15404 sym->st_value = 0;
15405 }
15406 }
15407 }
15408 }
15409
15410 if (h->needs_copy)
15411 {
15412 /* This symbol needs a copy reloc. Set it up. */
15413
15414 if (h->dynindx == -1
15415 || (h->root.type != bfd_link_hash_defined
15416 && h->root.type != bfd_link_hash_defweak)
15417 || htab->relbss == NULL)
15418 abort ();
15419
15420 rela.r_offset = (h->root.u.def.value
15421 + h->root.u.def.section->output_section->vma
15422 + h->root.u.def.section->output_offset);
15423 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
15424 rela.r_addend = 0;
15425 loc = htab->relbss->contents;
15426 loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela);
15427 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
15428 }
15429
15430 return TRUE;
15431 }
15432
15433 /* Used to decide how to sort relocs in an optimal manner for the
15434 dynamic linker, before writing them out. */
15435
15436 static enum elf_reloc_type_class
15437 ppc64_elf_reloc_type_class (const struct bfd_link_info *info,
15438 const asection *rel_sec,
15439 const Elf_Internal_Rela *rela)
15440 {
15441 enum elf_ppc64_reloc_type r_type;
15442 struct ppc_link_hash_table *htab = ppc_hash_table (info);
15443
15444 if (rel_sec == htab->elf.irelplt)
15445 return reloc_class_ifunc;
15446
15447 r_type = ELF64_R_TYPE (rela->r_info);
15448 switch (r_type)
15449 {
15450 case R_PPC64_RELATIVE:
15451 return reloc_class_relative;
15452 case R_PPC64_JMP_SLOT:
15453 return reloc_class_plt;
15454 case R_PPC64_COPY:
15455 return reloc_class_copy;
15456 default:
15457 return reloc_class_normal;
15458 }
15459 }
15460
15461 /* Finish up the dynamic sections. */
15462
15463 static bfd_boolean
15464 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
15465 struct bfd_link_info *info)
15466 {
15467 struct ppc_link_hash_table *htab;
15468 bfd *dynobj;
15469 asection *sdyn;
15470
15471 htab = ppc_hash_table (info);
15472 if (htab == NULL)
15473 return FALSE;
15474
15475 dynobj = htab->elf.dynobj;
15476 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
15477
15478 if (htab->elf.dynamic_sections_created)
15479 {
15480 Elf64_External_Dyn *dyncon, *dynconend;
15481
15482 if (sdyn == NULL || htab->elf.sgot == NULL)
15483 abort ();
15484
15485 dyncon = (Elf64_External_Dyn *) sdyn->contents;
15486 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
15487 for (; dyncon < dynconend; dyncon++)
15488 {
15489 Elf_Internal_Dyn dyn;
15490 asection *s;
15491
15492 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
15493
15494 switch (dyn.d_tag)
15495 {
15496 default:
15497 continue;
15498
15499 case DT_PPC64_GLINK:
15500 s = htab->glink;
15501 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15502 /* We stupidly defined DT_PPC64_GLINK to be the start
15503 of glink rather than the first entry point, which is
15504 what ld.so needs, and now have a bigger stub to
15505 support automatic multiple TOCs. */
15506 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 8 * 4;
15507 break;
15508
15509 case DT_PPC64_OPD:
15510 s = bfd_get_section_by_name (output_bfd, ".opd");
15511 if (s == NULL)
15512 continue;
15513 dyn.d_un.d_ptr = s->vma;
15514 break;
15515
15516 case DT_PPC64_OPT:
15517 if (htab->do_multi_toc && htab->multi_toc_needed)
15518 dyn.d_un.d_val |= PPC64_OPT_MULTI_TOC;
15519 break;
15520
15521 case DT_PPC64_OPDSZ:
15522 s = bfd_get_section_by_name (output_bfd, ".opd");
15523 if (s == NULL)
15524 continue;
15525 dyn.d_un.d_val = s->size;
15526 break;
15527
15528 case DT_PLTGOT:
15529 s = htab->elf.splt;
15530 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15531 break;
15532
15533 case DT_JMPREL:
15534 s = htab->elf.srelplt;
15535 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15536 break;
15537
15538 case DT_PLTRELSZ:
15539 dyn.d_un.d_val = htab->elf.srelplt->size;
15540 break;
15541
15542 case DT_RELASZ:
15543 /* Don't count procedure linkage table relocs in the
15544 overall reloc count. */
15545 s = htab->elf.srelplt;
15546 if (s == NULL)
15547 continue;
15548 dyn.d_un.d_val -= s->size;
15549 break;
15550
15551 case DT_RELA:
15552 /* We may not be using the standard ELF linker script.
15553 If .rela.plt is the first .rela section, we adjust
15554 DT_RELA to not include it. */
15555 s = htab->elf.srelplt;
15556 if (s == NULL)
15557 continue;
15558 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
15559 continue;
15560 dyn.d_un.d_ptr += s->size;
15561 break;
15562 }
15563
15564 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
15565 }
15566 }
15567
15568 if (htab->elf.sgot != NULL && htab->elf.sgot->size != 0)
15569 {
15570 /* Fill in the first entry in the global offset table.
15571 We use it to hold the link-time TOCbase. */
15572 bfd_put_64 (output_bfd,
15573 elf_gp (output_bfd) + TOC_BASE_OFF,
15574 htab->elf.sgot->contents);
15575
15576 /* Set .got entry size. */
15577 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 8;
15578 }
15579
15580 if (htab->elf.splt != NULL && htab->elf.splt->size != 0)
15581 {
15582 /* Set .plt entry size. */
15583 elf_section_data (htab->elf.splt->output_section)->this_hdr.sh_entsize
15584 = PLT_ENTRY_SIZE (htab);
15585 }
15586
15587 /* brlt is SEC_LINKER_CREATED, so we need to write out relocs for
15588 brlt ourselves if emitrelocations. */
15589 if (htab->brlt != NULL
15590 && htab->brlt->reloc_count != 0
15591 && !_bfd_elf_link_output_relocs (output_bfd,
15592 htab->brlt,
15593 elf_section_data (htab->brlt)->rela.hdr,
15594 elf_section_data (htab->brlt)->relocs,
15595 NULL))
15596 return FALSE;
15597
15598 if (htab->glink != NULL
15599 && htab->glink->reloc_count != 0
15600 && !_bfd_elf_link_output_relocs (output_bfd,
15601 htab->glink,
15602 elf_section_data (htab->glink)->rela.hdr,
15603 elf_section_data (htab->glink)->relocs,
15604 NULL))
15605 return FALSE;
15606
15607 if (htab->glink_eh_frame != NULL
15608 && htab->glink_eh_frame->size != 0)
15609 {
15610 bfd_vma val;
15611 bfd_byte *p;
15612 asection *stub_sec;
15613
15614 p = htab->glink_eh_frame->contents + sizeof (glink_eh_frame_cie);
15615 for (stub_sec = htab->params->stub_bfd->sections;
15616 stub_sec != NULL;
15617 stub_sec = stub_sec->next)
15618 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
15619 {
15620 /* FDE length. */
15621 p += 4;
15622 /* CIE pointer. */
15623 p += 4;
15624 /* Offset to stub section. */
15625 val = (stub_sec->output_section->vma
15626 + stub_sec->output_offset);
15627 val -= (htab->glink_eh_frame->output_section->vma
15628 + htab->glink_eh_frame->output_offset
15629 + (p - htab->glink_eh_frame->contents));
15630 if (val + 0x80000000 > 0xffffffff)
15631 {
15632 info->callbacks->einfo
15633 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
15634 stub_sec->name);
15635 return FALSE;
15636 }
15637 bfd_put_32 (dynobj, val, p);
15638 p += 4;
15639 /* stub section size. */
15640 p += 4;
15641 /* Augmentation. */
15642 p += 1;
15643 /* Pad. */
15644 p += 7;
15645 }
15646 if (htab->glink != NULL && htab->glink->size != 0)
15647 {
15648 /* FDE length. */
15649 p += 4;
15650 /* CIE pointer. */
15651 p += 4;
15652 /* Offset to .glink. */
15653 val = (htab->glink->output_section->vma
15654 + htab->glink->output_offset
15655 + 8);
15656 val -= (htab->glink_eh_frame->output_section->vma
15657 + htab->glink_eh_frame->output_offset
15658 + (p - htab->glink_eh_frame->contents));
15659 if (val + 0x80000000 > 0xffffffff)
15660 {
15661 info->callbacks->einfo
15662 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
15663 htab->glink->name);
15664 return FALSE;
15665 }
15666 bfd_put_32 (dynobj, val, p);
15667 p += 4;
15668 /* .glink size. */
15669 p += 4;
15670 /* Augmentation. */
15671 p += 1;
15672 /* Ops. */
15673 p += 7;
15674 }
15675
15676 if (htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME
15677 && !_bfd_elf_write_section_eh_frame (output_bfd, info,
15678 htab->glink_eh_frame,
15679 htab->glink_eh_frame->contents))
15680 return FALSE;
15681 }
15682
15683 /* We need to handle writing out multiple GOT sections ourselves,
15684 since we didn't add them to DYNOBJ. We know dynobj is the first
15685 bfd. */
15686 while ((dynobj = dynobj->link.next) != NULL)
15687 {
15688 asection *s;
15689
15690 if (!is_ppc64_elf (dynobj))
15691 continue;
15692
15693 s = ppc64_elf_tdata (dynobj)->got;
15694 if (s != NULL
15695 && s->size != 0
15696 && s->output_section != bfd_abs_section_ptr
15697 && !bfd_set_section_contents (output_bfd, s->output_section,
15698 s->contents, s->output_offset,
15699 s->size))
15700 return FALSE;
15701 s = ppc64_elf_tdata (dynobj)->relgot;
15702 if (s != NULL
15703 && s->size != 0
15704 && s->output_section != bfd_abs_section_ptr
15705 && !bfd_set_section_contents (output_bfd, s->output_section,
15706 s->contents, s->output_offset,
15707 s->size))
15708 return FALSE;
15709 }
15710
15711 return TRUE;
15712 }
15713
15714 #include "elf64-target.h"
15715
15716 /* FreeBSD support */
15717
15718 #undef TARGET_LITTLE_SYM
15719 #undef TARGET_LITTLE_NAME
15720
15721 #undef TARGET_BIG_SYM
15722 #define TARGET_BIG_SYM powerpc_elf64_fbsd_vec
15723 #undef TARGET_BIG_NAME
15724 #define TARGET_BIG_NAME "elf64-powerpc-freebsd"
15725
15726 #undef ELF_OSABI
15727 #define ELF_OSABI ELFOSABI_FREEBSD
15728
15729 #undef elf64_bed
15730 #define elf64_bed elf64_powerpc_fbsd_bed
15731
15732 #include "elf64-target.h"
15733
GDB Binutils - Deliverables
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