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Several fixes related to ARC PIE support.
[deliverable/binutils-gdb.git] / bfd / elf64-ppc.c
1 /* PowerPC64-specific support for 64-bit ELF.
2 Copyright (C) 1999-2016 Free Software Foundation, Inc.
3 Written by Linus Nordberg, Swox AB <info@swox.com>,
4 based on elf32-ppc.c by Ian Lance Taylor.
5 Largely rewritten by Alan Modra.
6
7 This file is part of BFD, the Binary File Descriptor library.
8
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
13
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
18
19 You should have received a copy of the GNU General Public License along
20 with this program; if not, write to the Free Software Foundation, Inc.,
21 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
22
23
24 /* The 64-bit PowerPC ELF ABI may be found at
25 http://www.linuxbase.org/spec/ELF/ppc64/PPC-elf64abi.txt, and
26 http://www.linuxbase.org/spec/ELF/ppc64/spec/book1.html */
27
28 #include "sysdep.h"
29 #include <stdarg.h>
30 #include "bfd.h"
31 #include "bfdlink.h"
32 #include "libbfd.h"
33 #include "elf-bfd.h"
34 #include "elf/ppc64.h"
35 #include "elf64-ppc.h"
36 #include "dwarf2.h"
37
38 static bfd_reloc_status_type ppc64_elf_ha_reloc
39 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
40 static bfd_reloc_status_type ppc64_elf_branch_reloc
41 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
42 static bfd_reloc_status_type ppc64_elf_brtaken_reloc
43 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
44 static bfd_reloc_status_type ppc64_elf_sectoff_reloc
45 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
46 static bfd_reloc_status_type ppc64_elf_sectoff_ha_reloc
47 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
48 static bfd_reloc_status_type ppc64_elf_toc_reloc
49 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
50 static bfd_reloc_status_type ppc64_elf_toc_ha_reloc
51 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
52 static bfd_reloc_status_type ppc64_elf_toc64_reloc
53 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
54 static bfd_reloc_status_type ppc64_elf_unhandled_reloc
55 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
56 static bfd_vma opd_entry_value
57 (asection *, bfd_vma, asection **, bfd_vma *, bfd_boolean);
58
59 #define TARGET_LITTLE_SYM powerpc_elf64_le_vec
60 #define TARGET_LITTLE_NAME "elf64-powerpcle"
61 #define TARGET_BIG_SYM powerpc_elf64_vec
62 #define TARGET_BIG_NAME "elf64-powerpc"
63 #define ELF_ARCH bfd_arch_powerpc
64 #define ELF_TARGET_ID PPC64_ELF_DATA
65 #define ELF_MACHINE_CODE EM_PPC64
66 #define ELF_MAXPAGESIZE 0x10000
67 #define ELF_COMMONPAGESIZE 0x10000
68 #define elf_info_to_howto ppc64_elf_info_to_howto
69
70 #define elf_backend_want_got_sym 0
71 #define elf_backend_want_plt_sym 0
72 #define elf_backend_plt_alignment 3
73 #define elf_backend_plt_not_loaded 1
74 #define elf_backend_got_header_size 8
75 #define elf_backend_can_gc_sections 1
76 #define elf_backend_can_refcount 1
77 #define elf_backend_rela_normal 1
78 #define elf_backend_default_execstack 0
79
80 #define bfd_elf64_mkobject ppc64_elf_mkobject
81 #define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup
82 #define bfd_elf64_bfd_reloc_name_lookup ppc64_elf_reloc_name_lookup
83 #define bfd_elf64_bfd_merge_private_bfd_data ppc64_elf_merge_private_bfd_data
84 #define bfd_elf64_bfd_print_private_bfd_data ppc64_elf_print_private_bfd_data
85 #define bfd_elf64_new_section_hook ppc64_elf_new_section_hook
86 #define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create
87 #define bfd_elf64_get_synthetic_symtab ppc64_elf_get_synthetic_symtab
88 #define bfd_elf64_bfd_link_just_syms ppc64_elf_link_just_syms
89
90 #define elf_backend_object_p ppc64_elf_object_p
91 #define elf_backend_grok_prstatus ppc64_elf_grok_prstatus
92 #define elf_backend_grok_psinfo ppc64_elf_grok_psinfo
93 #define elf_backend_write_core_note ppc64_elf_write_core_note
94 #define elf_backend_create_dynamic_sections ppc64_elf_create_dynamic_sections
95 #define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol
96 #define elf_backend_add_symbol_hook ppc64_elf_add_symbol_hook
97 #define elf_backend_check_directives ppc64_elf_before_check_relocs
98 #define elf_backend_notice_as_needed ppc64_elf_notice_as_needed
99 #define elf_backend_archive_symbol_lookup ppc64_elf_archive_symbol_lookup
100 #define elf_backend_check_relocs ppc64_elf_check_relocs
101 #define elf_backend_gc_keep ppc64_elf_gc_keep
102 #define elf_backend_gc_mark_dynamic_ref ppc64_elf_gc_mark_dynamic_ref
103 #define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook
104 #define elf_backend_gc_sweep_hook ppc64_elf_gc_sweep_hook
105 #define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol
106 #define elf_backend_hide_symbol ppc64_elf_hide_symbol
107 #define elf_backend_maybe_function_sym ppc64_elf_maybe_function_sym
108 #define elf_backend_always_size_sections ppc64_elf_func_desc_adjust
109 #define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections
110 #define elf_backend_hash_symbol ppc64_elf_hash_symbol
111 #define elf_backend_init_index_section _bfd_elf_init_2_index_sections
112 #define elf_backend_action_discarded ppc64_elf_action_discarded
113 #define elf_backend_relocate_section ppc64_elf_relocate_section
114 #define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol
115 #define elf_backend_reloc_type_class ppc64_elf_reloc_type_class
116 #define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections
117 #define elf_backend_link_output_symbol_hook ppc64_elf_output_symbol_hook
118 #define elf_backend_special_sections ppc64_elf_special_sections
119 #define elf_backend_merge_symbol_attribute ppc64_elf_merge_symbol_attribute
120
121 /* The name of the dynamic interpreter. This is put in the .interp
122 section. */
123 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
124
125 /* The size in bytes of an entry in the procedure linkage table. */
126 #define PLT_ENTRY_SIZE(htab) (htab->opd_abi ? 24 : 8)
127
128 /* The initial size of the plt reserved for the dynamic linker. */
129 #define PLT_INITIAL_ENTRY_SIZE(htab) (htab->opd_abi ? 24 : 16)
130
131 /* Offsets to some stack save slots. */
132 #define STK_LR 16
133 #define STK_TOC(htab) (htab->opd_abi ? 40 : 24)
134 /* This one is dodgy. ELFv2 does not have a linker word, so use the
135 CR save slot. Used only by optimised __tls_get_addr call stub,
136 relying on __tls_get_addr_opt not saving CR.. */
137 #define STK_LINKER(htab) (htab->opd_abi ? 32 : 8)
138
139 /* TOC base pointers offset from start of TOC. */
140 #define TOC_BASE_OFF 0x8000
141 /* TOC base alignment. */
142 #define TOC_BASE_ALIGN 256
143
144 /* Offset of tp and dtp pointers from start of TLS block. */
145 #define TP_OFFSET 0x7000
146 #define DTP_OFFSET 0x8000
147
148 /* .plt call stub instructions. The normal stub is like this, but
149 sometimes the .plt entry crosses a 64k boundary and we need to
150 insert an addi to adjust r11. */
151 #define STD_R2_0R1 0xf8410000 /* std %r2,0+40(%r1) */
152 #define ADDIS_R11_R2 0x3d620000 /* addis %r11,%r2,xxx@ha */
153 #define LD_R12_0R11 0xe98b0000 /* ld %r12,xxx+0@l(%r11) */
154 #define MTCTR_R12 0x7d8903a6 /* mtctr %r12 */
155 #define LD_R2_0R11 0xe84b0000 /* ld %r2,xxx+8@l(%r11) */
156 #define LD_R11_0R11 0xe96b0000 /* ld %r11,xxx+16@l(%r11) */
157 #define BCTR 0x4e800420 /* bctr */
158
159 #define ADDI_R11_R11 0x396b0000 /* addi %r11,%r11,off@l */
160 #define ADDIS_R2_R2 0x3c420000 /* addis %r2,%r2,off@ha */
161 #define ADDI_R2_R2 0x38420000 /* addi %r2,%r2,off@l */
162
163 #define XOR_R2_R12_R12 0x7d826278 /* xor %r2,%r12,%r12 */
164 #define ADD_R11_R11_R2 0x7d6b1214 /* add %r11,%r11,%r2 */
165 #define XOR_R11_R12_R12 0x7d8b6278 /* xor %r11,%r12,%r12 */
166 #define ADD_R2_R2_R11 0x7c425a14 /* add %r2,%r2,%r11 */
167 #define CMPLDI_R2_0 0x28220000 /* cmpldi %r2,0 */
168 #define BNECTR 0x4ca20420 /* bnectr+ */
169 #define BNECTR_P4 0x4ce20420 /* bnectr+ */
170
171 #define LD_R12_0R2 0xe9820000 /* ld %r12,xxx+0(%r2) */
172 #define LD_R11_0R2 0xe9620000 /* ld %r11,xxx+0(%r2) */
173 #define LD_R2_0R2 0xe8420000 /* ld %r2,xxx+0(%r2) */
174
175 #define LD_R2_0R1 0xe8410000 /* ld %r2,0(%r1) */
176 #define LD_R2_0R12 0xe84c0000 /* ld %r2,0(%r12) */
177 #define ADD_R2_R2_R12 0x7c426214 /* add %r2,%r2,%r12 */
178
179 #define LIS_R2 0x3c400000 /* lis %r2,xxx@ha */
180 #define ADDIS_R2_R12 0x3c4c0000 /* addis %r2,%r12,xxx@ha */
181 #define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */
182 #define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,xxx@ha */
183 #define LD_R12_0R12 0xe98c0000 /* ld %r12,xxx@l(%r12) */
184
185 /* glink call stub instructions. We enter with the index in R0. */
186 #define GLINK_CALL_STUB_SIZE (16*4)
187 /* 0: */
188 /* .quad plt0-1f */
189 /* __glink: */
190 #define MFLR_R12 0x7d8802a6 /* mflr %12 */
191 #define BCL_20_31 0x429f0005 /* bcl 20,31,1f */
192 /* 1: */
193 #define MFLR_R11 0x7d6802a6 /* mflr %11 */
194 /* ld %2,(0b-1b)(%11) */
195 #define MTLR_R12 0x7d8803a6 /* mtlr %12 */
196 #define ADD_R11_R2_R11 0x7d625a14 /* add %11,%2,%11 */
197 /* ld %12,0(%11) */
198 /* ld %2,8(%11) */
199 /* mtctr %12 */
200 /* ld %11,16(%11) */
201 /* bctr */
202 #define MFLR_R0 0x7c0802a6 /* mflr %r0 */
203 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
204 #define SUB_R12_R12_R11 0x7d8b6050 /* subf %r12,%r11,%r12 */
205 #define ADDI_R0_R12 0x380c0000 /* addi %r0,%r12,0 */
206 #define SRDI_R0_R0_2 0x7800f082 /* rldicl %r0,%r0,62,2 */
207
208 /* Pad with this. */
209 #define NOP 0x60000000
210
211 /* Some other nops. */
212 #define CROR_151515 0x4def7b82
213 #define CROR_313131 0x4ffffb82
214
215 /* .glink entries for the first 32k functions are two instructions. */
216 #define LI_R0_0 0x38000000 /* li %r0,0 */
217 #define B_DOT 0x48000000 /* b . */
218
219 /* After that, we need two instructions to load the index, followed by
220 a branch. */
221 #define LIS_R0_0 0x3c000000 /* lis %r0,0 */
222 #define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
223
224 /* Instructions used by the save and restore reg functions. */
225 #define STD_R0_0R1 0xf8010000 /* std %r0,0(%r1) */
226 #define STD_R0_0R12 0xf80c0000 /* std %r0,0(%r12) */
227 #define LD_R0_0R1 0xe8010000 /* ld %r0,0(%r1) */
228 #define LD_R0_0R12 0xe80c0000 /* ld %r0,0(%r12) */
229 #define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
230 #define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
231 #define LI_R12_0 0x39800000 /* li %r12,0 */
232 #define STVX_VR0_R12_R0 0x7c0c01ce /* stvx %v0,%r12,%r0 */
233 #define LVX_VR0_R12_R0 0x7c0c00ce /* lvx %v0,%r12,%r0 */
234 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
235 #define BLR 0x4e800020 /* blr */
236
237 /* Since .opd is an array of descriptors and each entry will end up
238 with identical R_PPC64_RELATIVE relocs, there is really no need to
239 propagate .opd relocs; The dynamic linker should be taught to
240 relocate .opd without reloc entries. */
241 #ifndef NO_OPD_RELOCS
242 #define NO_OPD_RELOCS 0
243 #endif
244
245 #ifndef ARRAY_SIZE
246 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
247 #endif
248
249 static inline int
250 abiversion (bfd *abfd)
251 {
252 return elf_elfheader (abfd)->e_flags & EF_PPC64_ABI;
253 }
254
255 static inline void
256 set_abiversion (bfd *abfd, int ver)
257 {
258 elf_elfheader (abfd)->e_flags &= ~EF_PPC64_ABI;
259 elf_elfheader (abfd)->e_flags |= ver & EF_PPC64_ABI;
260 }
261 \f
262 #define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1)
263
264 /* Relocation HOWTO's. */
265 static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max];
266
267 static reloc_howto_type ppc64_elf_howto_raw[] = {
268 /* This reloc does nothing. */
269 HOWTO (R_PPC64_NONE, /* type */
270 0, /* rightshift */
271 3, /* size (0 = byte, 1 = short, 2 = long) */
272 0, /* bitsize */
273 FALSE, /* pc_relative */
274 0, /* bitpos */
275 complain_overflow_dont, /* complain_on_overflow */
276 bfd_elf_generic_reloc, /* special_function */
277 "R_PPC64_NONE", /* name */
278 FALSE, /* partial_inplace */
279 0, /* src_mask */
280 0, /* dst_mask */
281 FALSE), /* pcrel_offset */
282
283 /* A standard 32 bit relocation. */
284 HOWTO (R_PPC64_ADDR32, /* type */
285 0, /* rightshift */
286 2, /* size (0 = byte, 1 = short, 2 = long) */
287 32, /* bitsize */
288 FALSE, /* pc_relative */
289 0, /* bitpos */
290 complain_overflow_bitfield, /* complain_on_overflow */
291 bfd_elf_generic_reloc, /* special_function */
292 "R_PPC64_ADDR32", /* name */
293 FALSE, /* partial_inplace */
294 0, /* src_mask */
295 0xffffffff, /* dst_mask */
296 FALSE), /* pcrel_offset */
297
298 /* An absolute 26 bit branch; the lower two bits must be zero.
299 FIXME: we don't check that, we just clear them. */
300 HOWTO (R_PPC64_ADDR24, /* type */
301 0, /* rightshift */
302 2, /* size (0 = byte, 1 = short, 2 = long) */
303 26, /* bitsize */
304 FALSE, /* pc_relative */
305 0, /* bitpos */
306 complain_overflow_bitfield, /* complain_on_overflow */
307 bfd_elf_generic_reloc, /* special_function */
308 "R_PPC64_ADDR24", /* name */
309 FALSE, /* partial_inplace */
310 0, /* src_mask */
311 0x03fffffc, /* dst_mask */
312 FALSE), /* pcrel_offset */
313
314 /* A standard 16 bit relocation. */
315 HOWTO (R_PPC64_ADDR16, /* type */
316 0, /* rightshift */
317 1, /* size (0 = byte, 1 = short, 2 = long) */
318 16, /* bitsize */
319 FALSE, /* pc_relative */
320 0, /* bitpos */
321 complain_overflow_bitfield, /* complain_on_overflow */
322 bfd_elf_generic_reloc, /* special_function */
323 "R_PPC64_ADDR16", /* name */
324 FALSE, /* partial_inplace */
325 0, /* src_mask */
326 0xffff, /* dst_mask */
327 FALSE), /* pcrel_offset */
328
329 /* A 16 bit relocation without overflow. */
330 HOWTO (R_PPC64_ADDR16_LO, /* type */
331 0, /* rightshift */
332 1, /* size (0 = byte, 1 = short, 2 = long) */
333 16, /* bitsize */
334 FALSE, /* pc_relative */
335 0, /* bitpos */
336 complain_overflow_dont,/* complain_on_overflow */
337 bfd_elf_generic_reloc, /* special_function */
338 "R_PPC64_ADDR16_LO", /* name */
339 FALSE, /* partial_inplace */
340 0, /* src_mask */
341 0xffff, /* dst_mask */
342 FALSE), /* pcrel_offset */
343
344 /* Bits 16-31 of an address. */
345 HOWTO (R_PPC64_ADDR16_HI, /* type */
346 16, /* rightshift */
347 1, /* size (0 = byte, 1 = short, 2 = long) */
348 16, /* bitsize */
349 FALSE, /* pc_relative */
350 0, /* bitpos */
351 complain_overflow_signed, /* complain_on_overflow */
352 bfd_elf_generic_reloc, /* special_function */
353 "R_PPC64_ADDR16_HI", /* name */
354 FALSE, /* partial_inplace */
355 0, /* src_mask */
356 0xffff, /* dst_mask */
357 FALSE), /* pcrel_offset */
358
359 /* Bits 16-31 of an address, plus 1 if the contents of the low 16
360 bits, treated as a signed number, is negative. */
361 HOWTO (R_PPC64_ADDR16_HA, /* type */
362 16, /* rightshift */
363 1, /* size (0 = byte, 1 = short, 2 = long) */
364 16, /* bitsize */
365 FALSE, /* pc_relative */
366 0, /* bitpos */
367 complain_overflow_signed, /* complain_on_overflow */
368 ppc64_elf_ha_reloc, /* special_function */
369 "R_PPC64_ADDR16_HA", /* name */
370 FALSE, /* partial_inplace */
371 0, /* src_mask */
372 0xffff, /* dst_mask */
373 FALSE), /* pcrel_offset */
374
375 /* An absolute 16 bit branch; the lower two bits must be zero.
376 FIXME: we don't check that, we just clear them. */
377 HOWTO (R_PPC64_ADDR14, /* type */
378 0, /* rightshift */
379 2, /* size (0 = byte, 1 = short, 2 = long) */
380 16, /* bitsize */
381 FALSE, /* pc_relative */
382 0, /* bitpos */
383 complain_overflow_signed, /* complain_on_overflow */
384 ppc64_elf_branch_reloc, /* special_function */
385 "R_PPC64_ADDR14", /* name */
386 FALSE, /* partial_inplace */
387 0, /* src_mask */
388 0x0000fffc, /* dst_mask */
389 FALSE), /* pcrel_offset */
390
391 /* An absolute 16 bit branch, for which bit 10 should be set to
392 indicate that the branch is expected to be taken. The lower two
393 bits must be zero. */
394 HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */
395 0, /* rightshift */
396 2, /* size (0 = byte, 1 = short, 2 = long) */
397 16, /* bitsize */
398 FALSE, /* pc_relative */
399 0, /* bitpos */
400 complain_overflow_signed, /* complain_on_overflow */
401 ppc64_elf_brtaken_reloc, /* special_function */
402 "R_PPC64_ADDR14_BRTAKEN",/* name */
403 FALSE, /* partial_inplace */
404 0, /* src_mask */
405 0x0000fffc, /* dst_mask */
406 FALSE), /* pcrel_offset */
407
408 /* An absolute 16 bit branch, for which bit 10 should be set to
409 indicate that the branch is not expected to be taken. The lower
410 two bits must be zero. */
411 HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */
412 0, /* rightshift */
413 2, /* size (0 = byte, 1 = short, 2 = long) */
414 16, /* bitsize */
415 FALSE, /* pc_relative */
416 0, /* bitpos */
417 complain_overflow_signed, /* complain_on_overflow */
418 ppc64_elf_brtaken_reloc, /* special_function */
419 "R_PPC64_ADDR14_BRNTAKEN",/* name */
420 FALSE, /* partial_inplace */
421 0, /* src_mask */
422 0x0000fffc, /* dst_mask */
423 FALSE), /* pcrel_offset */
424
425 /* A relative 26 bit branch; the lower two bits must be zero. */
426 HOWTO (R_PPC64_REL24, /* type */
427 0, /* rightshift */
428 2, /* size (0 = byte, 1 = short, 2 = long) */
429 26, /* bitsize */
430 TRUE, /* pc_relative */
431 0, /* bitpos */
432 complain_overflow_signed, /* complain_on_overflow */
433 ppc64_elf_branch_reloc, /* special_function */
434 "R_PPC64_REL24", /* name */
435 FALSE, /* partial_inplace */
436 0, /* src_mask */
437 0x03fffffc, /* dst_mask */
438 TRUE), /* pcrel_offset */
439
440 /* A relative 16 bit branch; the lower two bits must be zero. */
441 HOWTO (R_PPC64_REL14, /* type */
442 0, /* rightshift */
443 2, /* size (0 = byte, 1 = short, 2 = long) */
444 16, /* bitsize */
445 TRUE, /* pc_relative */
446 0, /* bitpos */
447 complain_overflow_signed, /* complain_on_overflow */
448 ppc64_elf_branch_reloc, /* special_function */
449 "R_PPC64_REL14", /* name */
450 FALSE, /* partial_inplace */
451 0, /* src_mask */
452 0x0000fffc, /* dst_mask */
453 TRUE), /* pcrel_offset */
454
455 /* A relative 16 bit branch. Bit 10 should be set to indicate that
456 the branch is expected to be taken. The lower two bits must be
457 zero. */
458 HOWTO (R_PPC64_REL14_BRTAKEN, /* type */
459 0, /* rightshift */
460 2, /* size (0 = byte, 1 = short, 2 = long) */
461 16, /* bitsize */
462 TRUE, /* pc_relative */
463 0, /* bitpos */
464 complain_overflow_signed, /* complain_on_overflow */
465 ppc64_elf_brtaken_reloc, /* special_function */
466 "R_PPC64_REL14_BRTAKEN", /* name */
467 FALSE, /* partial_inplace */
468 0, /* src_mask */
469 0x0000fffc, /* dst_mask */
470 TRUE), /* pcrel_offset */
471
472 /* A relative 16 bit branch. Bit 10 should be set to indicate that
473 the branch is not expected to be taken. The lower two bits must
474 be zero. */
475 HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */
476 0, /* rightshift */
477 2, /* size (0 = byte, 1 = short, 2 = long) */
478 16, /* bitsize */
479 TRUE, /* pc_relative */
480 0, /* bitpos */
481 complain_overflow_signed, /* complain_on_overflow */
482 ppc64_elf_brtaken_reloc, /* special_function */
483 "R_PPC64_REL14_BRNTAKEN",/* name */
484 FALSE, /* partial_inplace */
485 0, /* src_mask */
486 0x0000fffc, /* dst_mask */
487 TRUE), /* pcrel_offset */
488
489 /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
490 symbol. */
491 HOWTO (R_PPC64_GOT16, /* type */
492 0, /* rightshift */
493 1, /* size (0 = byte, 1 = short, 2 = long) */
494 16, /* bitsize */
495 FALSE, /* pc_relative */
496 0, /* bitpos */
497 complain_overflow_signed, /* complain_on_overflow */
498 ppc64_elf_unhandled_reloc, /* special_function */
499 "R_PPC64_GOT16", /* name */
500 FALSE, /* partial_inplace */
501 0, /* src_mask */
502 0xffff, /* dst_mask */
503 FALSE), /* pcrel_offset */
504
505 /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
506 the symbol. */
507 HOWTO (R_PPC64_GOT16_LO, /* type */
508 0, /* rightshift */
509 1, /* size (0 = byte, 1 = short, 2 = long) */
510 16, /* bitsize */
511 FALSE, /* pc_relative */
512 0, /* bitpos */
513 complain_overflow_dont, /* complain_on_overflow */
514 ppc64_elf_unhandled_reloc, /* special_function */
515 "R_PPC64_GOT16_LO", /* name */
516 FALSE, /* partial_inplace */
517 0, /* src_mask */
518 0xffff, /* dst_mask */
519 FALSE), /* pcrel_offset */
520
521 /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
522 the symbol. */
523 HOWTO (R_PPC64_GOT16_HI, /* type */
524 16, /* rightshift */
525 1, /* size (0 = byte, 1 = short, 2 = long) */
526 16, /* bitsize */
527 FALSE, /* pc_relative */
528 0, /* bitpos */
529 complain_overflow_signed,/* complain_on_overflow */
530 ppc64_elf_unhandled_reloc, /* special_function */
531 "R_PPC64_GOT16_HI", /* name */
532 FALSE, /* partial_inplace */
533 0, /* src_mask */
534 0xffff, /* dst_mask */
535 FALSE), /* pcrel_offset */
536
537 /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
538 the symbol. */
539 HOWTO (R_PPC64_GOT16_HA, /* type */
540 16, /* rightshift */
541 1, /* size (0 = byte, 1 = short, 2 = long) */
542 16, /* bitsize */
543 FALSE, /* pc_relative */
544 0, /* bitpos */
545 complain_overflow_signed,/* complain_on_overflow */
546 ppc64_elf_unhandled_reloc, /* special_function */
547 "R_PPC64_GOT16_HA", /* name */
548 FALSE, /* partial_inplace */
549 0, /* src_mask */
550 0xffff, /* dst_mask */
551 FALSE), /* pcrel_offset */
552
553 /* This is used only by the dynamic linker. The symbol should exist
554 both in the object being run and in some shared library. The
555 dynamic linker copies the data addressed by the symbol from the
556 shared library into the object, because the object being
557 run has to have the data at some particular address. */
558 HOWTO (R_PPC64_COPY, /* type */
559 0, /* rightshift */
560 0, /* this one is variable size */
561 0, /* bitsize */
562 FALSE, /* pc_relative */
563 0, /* bitpos */
564 complain_overflow_dont, /* complain_on_overflow */
565 ppc64_elf_unhandled_reloc, /* special_function */
566 "R_PPC64_COPY", /* name */
567 FALSE, /* partial_inplace */
568 0, /* src_mask */
569 0, /* dst_mask */
570 FALSE), /* pcrel_offset */
571
572 /* Like R_PPC64_ADDR64, but used when setting global offset table
573 entries. */
574 HOWTO (R_PPC64_GLOB_DAT, /* type */
575 0, /* rightshift */
576 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
577 64, /* bitsize */
578 FALSE, /* pc_relative */
579 0, /* bitpos */
580 complain_overflow_dont, /* complain_on_overflow */
581 ppc64_elf_unhandled_reloc, /* special_function */
582 "R_PPC64_GLOB_DAT", /* name */
583 FALSE, /* partial_inplace */
584 0, /* src_mask */
585 ONES (64), /* dst_mask */
586 FALSE), /* pcrel_offset */
587
588 /* Created by the link editor. Marks a procedure linkage table
589 entry for a symbol. */
590 HOWTO (R_PPC64_JMP_SLOT, /* type */
591 0, /* rightshift */
592 0, /* size (0 = byte, 1 = short, 2 = long) */
593 0, /* bitsize */
594 FALSE, /* pc_relative */
595 0, /* bitpos */
596 complain_overflow_dont, /* complain_on_overflow */
597 ppc64_elf_unhandled_reloc, /* special_function */
598 "R_PPC64_JMP_SLOT", /* name */
599 FALSE, /* partial_inplace */
600 0, /* src_mask */
601 0, /* dst_mask */
602 FALSE), /* pcrel_offset */
603
604 /* Used only by the dynamic linker. When the object is run, this
605 doubleword64 is set to the load address of the object, plus the
606 addend. */
607 HOWTO (R_PPC64_RELATIVE, /* type */
608 0, /* rightshift */
609 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
610 64, /* bitsize */
611 FALSE, /* pc_relative */
612 0, /* bitpos */
613 complain_overflow_dont, /* complain_on_overflow */
614 bfd_elf_generic_reloc, /* special_function */
615 "R_PPC64_RELATIVE", /* name */
616 FALSE, /* partial_inplace */
617 0, /* src_mask */
618 ONES (64), /* dst_mask */
619 FALSE), /* pcrel_offset */
620
621 /* Like R_PPC64_ADDR32, but may be unaligned. */
622 HOWTO (R_PPC64_UADDR32, /* type */
623 0, /* rightshift */
624 2, /* size (0 = byte, 1 = short, 2 = long) */
625 32, /* bitsize */
626 FALSE, /* pc_relative */
627 0, /* bitpos */
628 complain_overflow_bitfield, /* complain_on_overflow */
629 bfd_elf_generic_reloc, /* special_function */
630 "R_PPC64_UADDR32", /* name */
631 FALSE, /* partial_inplace */
632 0, /* src_mask */
633 0xffffffff, /* dst_mask */
634 FALSE), /* pcrel_offset */
635
636 /* Like R_PPC64_ADDR16, but may be unaligned. */
637 HOWTO (R_PPC64_UADDR16, /* type */
638 0, /* rightshift */
639 1, /* size (0 = byte, 1 = short, 2 = long) */
640 16, /* bitsize */
641 FALSE, /* pc_relative */
642 0, /* bitpos */
643 complain_overflow_bitfield, /* complain_on_overflow */
644 bfd_elf_generic_reloc, /* special_function */
645 "R_PPC64_UADDR16", /* name */
646 FALSE, /* partial_inplace */
647 0, /* src_mask */
648 0xffff, /* dst_mask */
649 FALSE), /* pcrel_offset */
650
651 /* 32-bit PC relative. */
652 HOWTO (R_PPC64_REL32, /* type */
653 0, /* rightshift */
654 2, /* size (0 = byte, 1 = short, 2 = long) */
655 32, /* bitsize */
656 TRUE, /* pc_relative */
657 0, /* bitpos */
658 complain_overflow_signed, /* complain_on_overflow */
659 bfd_elf_generic_reloc, /* special_function */
660 "R_PPC64_REL32", /* name */
661 FALSE, /* partial_inplace */
662 0, /* src_mask */
663 0xffffffff, /* dst_mask */
664 TRUE), /* pcrel_offset */
665
666 /* 32-bit relocation to the symbol's procedure linkage table. */
667 HOWTO (R_PPC64_PLT32, /* type */
668 0, /* rightshift */
669 2, /* size (0 = byte, 1 = short, 2 = long) */
670 32, /* bitsize */
671 FALSE, /* pc_relative */
672 0, /* bitpos */
673 complain_overflow_bitfield, /* complain_on_overflow */
674 ppc64_elf_unhandled_reloc, /* special_function */
675 "R_PPC64_PLT32", /* name */
676 FALSE, /* partial_inplace */
677 0, /* src_mask */
678 0xffffffff, /* dst_mask */
679 FALSE), /* pcrel_offset */
680
681 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
682 FIXME: R_PPC64_PLTREL32 not supported. */
683 HOWTO (R_PPC64_PLTREL32, /* type */
684 0, /* rightshift */
685 2, /* size (0 = byte, 1 = short, 2 = long) */
686 32, /* bitsize */
687 TRUE, /* pc_relative */
688 0, /* bitpos */
689 complain_overflow_signed, /* complain_on_overflow */
690 ppc64_elf_unhandled_reloc, /* special_function */
691 "R_PPC64_PLTREL32", /* name */
692 FALSE, /* partial_inplace */
693 0, /* src_mask */
694 0xffffffff, /* dst_mask */
695 TRUE), /* pcrel_offset */
696
697 /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
698 the symbol. */
699 HOWTO (R_PPC64_PLT16_LO, /* type */
700 0, /* rightshift */
701 1, /* size (0 = byte, 1 = short, 2 = long) */
702 16, /* bitsize */
703 FALSE, /* pc_relative */
704 0, /* bitpos */
705 complain_overflow_dont, /* complain_on_overflow */
706 ppc64_elf_unhandled_reloc, /* special_function */
707 "R_PPC64_PLT16_LO", /* name */
708 FALSE, /* partial_inplace */
709 0, /* src_mask */
710 0xffff, /* dst_mask */
711 FALSE), /* pcrel_offset */
712
713 /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
714 the symbol. */
715 HOWTO (R_PPC64_PLT16_HI, /* type */
716 16, /* rightshift */
717 1, /* size (0 = byte, 1 = short, 2 = long) */
718 16, /* bitsize */
719 FALSE, /* pc_relative */
720 0, /* bitpos */
721 complain_overflow_signed, /* complain_on_overflow */
722 ppc64_elf_unhandled_reloc, /* special_function */
723 "R_PPC64_PLT16_HI", /* name */
724 FALSE, /* partial_inplace */
725 0, /* src_mask */
726 0xffff, /* dst_mask */
727 FALSE), /* pcrel_offset */
728
729 /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
730 the symbol. */
731 HOWTO (R_PPC64_PLT16_HA, /* type */
732 16, /* rightshift */
733 1, /* size (0 = byte, 1 = short, 2 = long) */
734 16, /* bitsize */
735 FALSE, /* pc_relative */
736 0, /* bitpos */
737 complain_overflow_signed, /* complain_on_overflow */
738 ppc64_elf_unhandled_reloc, /* special_function */
739 "R_PPC64_PLT16_HA", /* name */
740 FALSE, /* partial_inplace */
741 0, /* src_mask */
742 0xffff, /* dst_mask */
743 FALSE), /* pcrel_offset */
744
745 /* 16-bit section relative relocation. */
746 HOWTO (R_PPC64_SECTOFF, /* type */
747 0, /* rightshift */
748 1, /* size (0 = byte, 1 = short, 2 = long) */
749 16, /* bitsize */
750 FALSE, /* pc_relative */
751 0, /* bitpos */
752 complain_overflow_signed, /* complain_on_overflow */
753 ppc64_elf_sectoff_reloc, /* special_function */
754 "R_PPC64_SECTOFF", /* name */
755 FALSE, /* partial_inplace */
756 0, /* src_mask */
757 0xffff, /* dst_mask */
758 FALSE), /* pcrel_offset */
759
760 /* Like R_PPC64_SECTOFF, but no overflow warning. */
761 HOWTO (R_PPC64_SECTOFF_LO, /* type */
762 0, /* rightshift */
763 1, /* size (0 = byte, 1 = short, 2 = long) */
764 16, /* bitsize */
765 FALSE, /* pc_relative */
766 0, /* bitpos */
767 complain_overflow_dont, /* complain_on_overflow */
768 ppc64_elf_sectoff_reloc, /* special_function */
769 "R_PPC64_SECTOFF_LO", /* name */
770 FALSE, /* partial_inplace */
771 0, /* src_mask */
772 0xffff, /* dst_mask */
773 FALSE), /* pcrel_offset */
774
775 /* 16-bit upper half section relative relocation. */
776 HOWTO (R_PPC64_SECTOFF_HI, /* type */
777 16, /* rightshift */
778 1, /* size (0 = byte, 1 = short, 2 = long) */
779 16, /* bitsize */
780 FALSE, /* pc_relative */
781 0, /* bitpos */
782 complain_overflow_signed, /* complain_on_overflow */
783 ppc64_elf_sectoff_reloc, /* special_function */
784 "R_PPC64_SECTOFF_HI", /* name */
785 FALSE, /* partial_inplace */
786 0, /* src_mask */
787 0xffff, /* dst_mask */
788 FALSE), /* pcrel_offset */
789
790 /* 16-bit upper half adjusted section relative relocation. */
791 HOWTO (R_PPC64_SECTOFF_HA, /* type */
792 16, /* rightshift */
793 1, /* size (0 = byte, 1 = short, 2 = long) */
794 16, /* bitsize */
795 FALSE, /* pc_relative */
796 0, /* bitpos */
797 complain_overflow_signed, /* complain_on_overflow */
798 ppc64_elf_sectoff_ha_reloc, /* special_function */
799 "R_PPC64_SECTOFF_HA", /* name */
800 FALSE, /* partial_inplace */
801 0, /* src_mask */
802 0xffff, /* dst_mask */
803 FALSE), /* pcrel_offset */
804
805 /* Like R_PPC64_REL24 without touching the two least significant bits. */
806 HOWTO (R_PPC64_REL30, /* type */
807 2, /* rightshift */
808 2, /* size (0 = byte, 1 = short, 2 = long) */
809 30, /* bitsize */
810 TRUE, /* pc_relative */
811 0, /* bitpos */
812 complain_overflow_dont, /* complain_on_overflow */
813 bfd_elf_generic_reloc, /* special_function */
814 "R_PPC64_REL30", /* name */
815 FALSE, /* partial_inplace */
816 0, /* src_mask */
817 0xfffffffc, /* dst_mask */
818 TRUE), /* pcrel_offset */
819
820 /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
821
822 /* A standard 64-bit relocation. */
823 HOWTO (R_PPC64_ADDR64, /* type */
824 0, /* rightshift */
825 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
826 64, /* bitsize */
827 FALSE, /* pc_relative */
828 0, /* bitpos */
829 complain_overflow_dont, /* complain_on_overflow */
830 bfd_elf_generic_reloc, /* special_function */
831 "R_PPC64_ADDR64", /* name */
832 FALSE, /* partial_inplace */
833 0, /* src_mask */
834 ONES (64), /* dst_mask */
835 FALSE), /* pcrel_offset */
836
837 /* The bits 32-47 of an address. */
838 HOWTO (R_PPC64_ADDR16_HIGHER, /* type */
839 32, /* rightshift */
840 1, /* size (0 = byte, 1 = short, 2 = long) */
841 16, /* bitsize */
842 FALSE, /* pc_relative */
843 0, /* bitpos */
844 complain_overflow_dont, /* complain_on_overflow */
845 bfd_elf_generic_reloc, /* special_function */
846 "R_PPC64_ADDR16_HIGHER", /* name */
847 FALSE, /* partial_inplace */
848 0, /* src_mask */
849 0xffff, /* dst_mask */
850 FALSE), /* pcrel_offset */
851
852 /* The bits 32-47 of an address, plus 1 if the contents of the low
853 16 bits, treated as a signed number, is negative. */
854 HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */
855 32, /* rightshift */
856 1, /* size (0 = byte, 1 = short, 2 = long) */
857 16, /* bitsize */
858 FALSE, /* pc_relative */
859 0, /* bitpos */
860 complain_overflow_dont, /* complain_on_overflow */
861 ppc64_elf_ha_reloc, /* special_function */
862 "R_PPC64_ADDR16_HIGHERA", /* name */
863 FALSE, /* partial_inplace */
864 0, /* src_mask */
865 0xffff, /* dst_mask */
866 FALSE), /* pcrel_offset */
867
868 /* The bits 48-63 of an address. */
869 HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */
870 48, /* rightshift */
871 1, /* size (0 = byte, 1 = short, 2 = long) */
872 16, /* bitsize */
873 FALSE, /* pc_relative */
874 0, /* bitpos */
875 complain_overflow_dont, /* complain_on_overflow */
876 bfd_elf_generic_reloc, /* special_function */
877 "R_PPC64_ADDR16_HIGHEST", /* name */
878 FALSE, /* partial_inplace */
879 0, /* src_mask */
880 0xffff, /* dst_mask */
881 FALSE), /* pcrel_offset */
882
883 /* The bits 48-63 of an address, plus 1 if the contents of the low
884 16 bits, treated as a signed number, is negative. */
885 HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */
886 48, /* rightshift */
887 1, /* size (0 = byte, 1 = short, 2 = long) */
888 16, /* bitsize */
889 FALSE, /* pc_relative */
890 0, /* bitpos */
891 complain_overflow_dont, /* complain_on_overflow */
892 ppc64_elf_ha_reloc, /* special_function */
893 "R_PPC64_ADDR16_HIGHESTA", /* name */
894 FALSE, /* partial_inplace */
895 0, /* src_mask */
896 0xffff, /* dst_mask */
897 FALSE), /* pcrel_offset */
898
899 /* Like ADDR64, but may be unaligned. */
900 HOWTO (R_PPC64_UADDR64, /* type */
901 0, /* rightshift */
902 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
903 64, /* bitsize */
904 FALSE, /* pc_relative */
905 0, /* bitpos */
906 complain_overflow_dont, /* complain_on_overflow */
907 bfd_elf_generic_reloc, /* special_function */
908 "R_PPC64_UADDR64", /* name */
909 FALSE, /* partial_inplace */
910 0, /* src_mask */
911 ONES (64), /* dst_mask */
912 FALSE), /* pcrel_offset */
913
914 /* 64-bit relative relocation. */
915 HOWTO (R_PPC64_REL64, /* type */
916 0, /* rightshift */
917 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
918 64, /* bitsize */
919 TRUE, /* pc_relative */
920 0, /* bitpos */
921 complain_overflow_dont, /* complain_on_overflow */
922 bfd_elf_generic_reloc, /* special_function */
923 "R_PPC64_REL64", /* name */
924 FALSE, /* partial_inplace */
925 0, /* src_mask */
926 ONES (64), /* dst_mask */
927 TRUE), /* pcrel_offset */
928
929 /* 64-bit relocation to the symbol's procedure linkage table. */
930 HOWTO (R_PPC64_PLT64, /* type */
931 0, /* rightshift */
932 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
933 64, /* bitsize */
934 FALSE, /* pc_relative */
935 0, /* bitpos */
936 complain_overflow_dont, /* complain_on_overflow */
937 ppc64_elf_unhandled_reloc, /* special_function */
938 "R_PPC64_PLT64", /* name */
939 FALSE, /* partial_inplace */
940 0, /* src_mask */
941 ONES (64), /* dst_mask */
942 FALSE), /* pcrel_offset */
943
944 /* 64-bit PC relative relocation to the symbol's procedure linkage
945 table. */
946 /* FIXME: R_PPC64_PLTREL64 not supported. */
947 HOWTO (R_PPC64_PLTREL64, /* type */
948 0, /* rightshift */
949 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
950 64, /* bitsize */
951 TRUE, /* pc_relative */
952 0, /* bitpos */
953 complain_overflow_dont, /* complain_on_overflow */
954 ppc64_elf_unhandled_reloc, /* special_function */
955 "R_PPC64_PLTREL64", /* name */
956 FALSE, /* partial_inplace */
957 0, /* src_mask */
958 ONES (64), /* dst_mask */
959 TRUE), /* pcrel_offset */
960
961 /* 16 bit TOC-relative relocation. */
962
963 /* R_PPC64_TOC16 47 half16* S + A - .TOC. */
964 HOWTO (R_PPC64_TOC16, /* type */
965 0, /* rightshift */
966 1, /* size (0 = byte, 1 = short, 2 = long) */
967 16, /* bitsize */
968 FALSE, /* pc_relative */
969 0, /* bitpos */
970 complain_overflow_signed, /* complain_on_overflow */
971 ppc64_elf_toc_reloc, /* special_function */
972 "R_PPC64_TOC16", /* name */
973 FALSE, /* partial_inplace */
974 0, /* src_mask */
975 0xffff, /* dst_mask */
976 FALSE), /* pcrel_offset */
977
978 /* 16 bit TOC-relative relocation without overflow. */
979
980 /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
981 HOWTO (R_PPC64_TOC16_LO, /* type */
982 0, /* rightshift */
983 1, /* size (0 = byte, 1 = short, 2 = long) */
984 16, /* bitsize */
985 FALSE, /* pc_relative */
986 0, /* bitpos */
987 complain_overflow_dont, /* complain_on_overflow */
988 ppc64_elf_toc_reloc, /* special_function */
989 "R_PPC64_TOC16_LO", /* name */
990 FALSE, /* partial_inplace */
991 0, /* src_mask */
992 0xffff, /* dst_mask */
993 FALSE), /* pcrel_offset */
994
995 /* 16 bit TOC-relative relocation, high 16 bits. */
996
997 /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
998 HOWTO (R_PPC64_TOC16_HI, /* type */
999 16, /* rightshift */
1000 1, /* size (0 = byte, 1 = short, 2 = long) */
1001 16, /* bitsize */
1002 FALSE, /* pc_relative */
1003 0, /* bitpos */
1004 complain_overflow_signed, /* complain_on_overflow */
1005 ppc64_elf_toc_reloc, /* special_function */
1006 "R_PPC64_TOC16_HI", /* name */
1007 FALSE, /* partial_inplace */
1008 0, /* src_mask */
1009 0xffff, /* dst_mask */
1010 FALSE), /* pcrel_offset */
1011
1012 /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the
1013 contents of the low 16 bits, treated as a signed number, is
1014 negative. */
1015
1016 /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
1017 HOWTO (R_PPC64_TOC16_HA, /* type */
1018 16, /* rightshift */
1019 1, /* size (0 = byte, 1 = short, 2 = long) */
1020 16, /* bitsize */
1021 FALSE, /* pc_relative */
1022 0, /* bitpos */
1023 complain_overflow_signed, /* complain_on_overflow */
1024 ppc64_elf_toc_ha_reloc, /* special_function */
1025 "R_PPC64_TOC16_HA", /* name */
1026 FALSE, /* partial_inplace */
1027 0, /* src_mask */
1028 0xffff, /* dst_mask */
1029 FALSE), /* pcrel_offset */
1030
1031 /* 64-bit relocation; insert value of TOC base (.TOC.). */
1032
1033 /* R_PPC64_TOC 51 doubleword64 .TOC. */
1034 HOWTO (R_PPC64_TOC, /* type */
1035 0, /* rightshift */
1036 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1037 64, /* bitsize */
1038 FALSE, /* pc_relative */
1039 0, /* bitpos */
1040 complain_overflow_dont, /* complain_on_overflow */
1041 ppc64_elf_toc64_reloc, /* special_function */
1042 "R_PPC64_TOC", /* name */
1043 FALSE, /* partial_inplace */
1044 0, /* src_mask */
1045 ONES (64), /* dst_mask */
1046 FALSE), /* pcrel_offset */
1047
1048 /* Like R_PPC64_GOT16, but also informs the link editor that the
1049 value to relocate may (!) refer to a PLT entry which the link
1050 editor (a) may replace with the symbol value. If the link editor
1051 is unable to fully resolve the symbol, it may (b) create a PLT
1052 entry and store the address to the new PLT entry in the GOT.
1053 This permits lazy resolution of function symbols at run time.
1054 The link editor may also skip all of this and just (c) emit a
1055 R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
1056 /* FIXME: R_PPC64_PLTGOT16 not implemented. */
1057 HOWTO (R_PPC64_PLTGOT16, /* type */
1058 0, /* rightshift */
1059 1, /* size (0 = byte, 1 = short, 2 = long) */
1060 16, /* bitsize */
1061 FALSE, /* pc_relative */
1062 0, /* bitpos */
1063 complain_overflow_signed, /* complain_on_overflow */
1064 ppc64_elf_unhandled_reloc, /* special_function */
1065 "R_PPC64_PLTGOT16", /* name */
1066 FALSE, /* partial_inplace */
1067 0, /* src_mask */
1068 0xffff, /* dst_mask */
1069 FALSE), /* pcrel_offset */
1070
1071 /* Like R_PPC64_PLTGOT16, but without overflow. */
1072 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1073 HOWTO (R_PPC64_PLTGOT16_LO, /* type */
1074 0, /* rightshift */
1075 1, /* size (0 = byte, 1 = short, 2 = long) */
1076 16, /* bitsize */
1077 FALSE, /* pc_relative */
1078 0, /* bitpos */
1079 complain_overflow_dont, /* complain_on_overflow */
1080 ppc64_elf_unhandled_reloc, /* special_function */
1081 "R_PPC64_PLTGOT16_LO", /* name */
1082 FALSE, /* partial_inplace */
1083 0, /* src_mask */
1084 0xffff, /* dst_mask */
1085 FALSE), /* pcrel_offset */
1086
1087 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */
1088 /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */
1089 HOWTO (R_PPC64_PLTGOT16_HI, /* type */
1090 16, /* rightshift */
1091 1, /* size (0 = byte, 1 = short, 2 = long) */
1092 16, /* bitsize */
1093 FALSE, /* pc_relative */
1094 0, /* bitpos */
1095 complain_overflow_signed, /* complain_on_overflow */
1096 ppc64_elf_unhandled_reloc, /* special_function */
1097 "R_PPC64_PLTGOT16_HI", /* name */
1098 FALSE, /* partial_inplace */
1099 0, /* src_mask */
1100 0xffff, /* dst_mask */
1101 FALSE), /* pcrel_offset */
1102
1103 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus
1104 1 if the contents of the low 16 bits, treated as a signed number,
1105 is negative. */
1106 /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */
1107 HOWTO (R_PPC64_PLTGOT16_HA, /* type */
1108 16, /* rightshift */
1109 1, /* size (0 = byte, 1 = short, 2 = long) */
1110 16, /* bitsize */
1111 FALSE, /* pc_relative */
1112 0, /* bitpos */
1113 complain_overflow_signed, /* complain_on_overflow */
1114 ppc64_elf_unhandled_reloc, /* special_function */
1115 "R_PPC64_PLTGOT16_HA", /* name */
1116 FALSE, /* partial_inplace */
1117 0, /* src_mask */
1118 0xffff, /* dst_mask */
1119 FALSE), /* pcrel_offset */
1120
1121 /* Like R_PPC64_ADDR16, but for instructions with a DS field. */
1122 HOWTO (R_PPC64_ADDR16_DS, /* type */
1123 0, /* rightshift */
1124 1, /* size (0 = byte, 1 = short, 2 = long) */
1125 16, /* bitsize */
1126 FALSE, /* pc_relative */
1127 0, /* bitpos */
1128 complain_overflow_signed, /* complain_on_overflow */
1129 bfd_elf_generic_reloc, /* special_function */
1130 "R_PPC64_ADDR16_DS", /* name */
1131 FALSE, /* partial_inplace */
1132 0, /* src_mask */
1133 0xfffc, /* dst_mask */
1134 FALSE), /* pcrel_offset */
1135
1136 /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
1137 HOWTO (R_PPC64_ADDR16_LO_DS, /* type */
1138 0, /* rightshift */
1139 1, /* size (0 = byte, 1 = short, 2 = long) */
1140 16, /* bitsize */
1141 FALSE, /* pc_relative */
1142 0, /* bitpos */
1143 complain_overflow_dont,/* complain_on_overflow */
1144 bfd_elf_generic_reloc, /* special_function */
1145 "R_PPC64_ADDR16_LO_DS",/* name */
1146 FALSE, /* partial_inplace */
1147 0, /* src_mask */
1148 0xfffc, /* dst_mask */
1149 FALSE), /* pcrel_offset */
1150
1151 /* Like R_PPC64_GOT16, but for instructions with a DS field. */
1152 HOWTO (R_PPC64_GOT16_DS, /* type */
1153 0, /* rightshift */
1154 1, /* size (0 = byte, 1 = short, 2 = long) */
1155 16, /* bitsize */
1156 FALSE, /* pc_relative */
1157 0, /* bitpos */
1158 complain_overflow_signed, /* complain_on_overflow */
1159 ppc64_elf_unhandled_reloc, /* special_function */
1160 "R_PPC64_GOT16_DS", /* name */
1161 FALSE, /* partial_inplace */
1162 0, /* src_mask */
1163 0xfffc, /* dst_mask */
1164 FALSE), /* pcrel_offset */
1165
1166 /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
1167 HOWTO (R_PPC64_GOT16_LO_DS, /* type */
1168 0, /* rightshift */
1169 1, /* size (0 = byte, 1 = short, 2 = long) */
1170 16, /* bitsize */
1171 FALSE, /* pc_relative */
1172 0, /* bitpos */
1173 complain_overflow_dont, /* complain_on_overflow */
1174 ppc64_elf_unhandled_reloc, /* special_function */
1175 "R_PPC64_GOT16_LO_DS", /* name */
1176 FALSE, /* partial_inplace */
1177 0, /* src_mask */
1178 0xfffc, /* dst_mask */
1179 FALSE), /* pcrel_offset */
1180
1181 /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
1182 HOWTO (R_PPC64_PLT16_LO_DS, /* type */
1183 0, /* rightshift */
1184 1, /* size (0 = byte, 1 = short, 2 = long) */
1185 16, /* bitsize */
1186 FALSE, /* pc_relative */
1187 0, /* bitpos */
1188 complain_overflow_dont, /* complain_on_overflow */
1189 ppc64_elf_unhandled_reloc, /* special_function */
1190 "R_PPC64_PLT16_LO_DS", /* name */
1191 FALSE, /* partial_inplace */
1192 0, /* src_mask */
1193 0xfffc, /* dst_mask */
1194 FALSE), /* pcrel_offset */
1195
1196 /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
1197 HOWTO (R_PPC64_SECTOFF_DS, /* type */
1198 0, /* rightshift */
1199 1, /* size (0 = byte, 1 = short, 2 = long) */
1200 16, /* bitsize */
1201 FALSE, /* pc_relative */
1202 0, /* bitpos */
1203 complain_overflow_signed, /* complain_on_overflow */
1204 ppc64_elf_sectoff_reloc, /* special_function */
1205 "R_PPC64_SECTOFF_DS", /* name */
1206 FALSE, /* partial_inplace */
1207 0, /* src_mask */
1208 0xfffc, /* dst_mask */
1209 FALSE), /* pcrel_offset */
1210
1211 /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
1212 HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */
1213 0, /* rightshift */
1214 1, /* size (0 = byte, 1 = short, 2 = long) */
1215 16, /* bitsize */
1216 FALSE, /* pc_relative */
1217 0, /* bitpos */
1218 complain_overflow_dont, /* complain_on_overflow */
1219 ppc64_elf_sectoff_reloc, /* special_function */
1220 "R_PPC64_SECTOFF_LO_DS",/* name */
1221 FALSE, /* partial_inplace */
1222 0, /* src_mask */
1223 0xfffc, /* dst_mask */
1224 FALSE), /* pcrel_offset */
1225
1226 /* Like R_PPC64_TOC16, but for instructions with a DS field. */
1227 HOWTO (R_PPC64_TOC16_DS, /* type */
1228 0, /* rightshift */
1229 1, /* size (0 = byte, 1 = short, 2 = long) */
1230 16, /* bitsize */
1231 FALSE, /* pc_relative */
1232 0, /* bitpos */
1233 complain_overflow_signed, /* complain_on_overflow */
1234 ppc64_elf_toc_reloc, /* special_function */
1235 "R_PPC64_TOC16_DS", /* name */
1236 FALSE, /* partial_inplace */
1237 0, /* src_mask */
1238 0xfffc, /* dst_mask */
1239 FALSE), /* pcrel_offset */
1240
1241 /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
1242 HOWTO (R_PPC64_TOC16_LO_DS, /* type */
1243 0, /* rightshift */
1244 1, /* size (0 = byte, 1 = short, 2 = long) */
1245 16, /* bitsize */
1246 FALSE, /* pc_relative */
1247 0, /* bitpos */
1248 complain_overflow_dont, /* complain_on_overflow */
1249 ppc64_elf_toc_reloc, /* special_function */
1250 "R_PPC64_TOC16_LO_DS", /* name */
1251 FALSE, /* partial_inplace */
1252 0, /* src_mask */
1253 0xfffc, /* dst_mask */
1254 FALSE), /* pcrel_offset */
1255
1256 /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
1257 /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
1258 HOWTO (R_PPC64_PLTGOT16_DS, /* type */
1259 0, /* rightshift */
1260 1, /* size (0 = byte, 1 = short, 2 = long) */
1261 16, /* bitsize */
1262 FALSE, /* pc_relative */
1263 0, /* bitpos */
1264 complain_overflow_signed, /* complain_on_overflow */
1265 ppc64_elf_unhandled_reloc, /* special_function */
1266 "R_PPC64_PLTGOT16_DS", /* name */
1267 FALSE, /* partial_inplace */
1268 0, /* src_mask */
1269 0xfffc, /* dst_mask */
1270 FALSE), /* pcrel_offset */
1271
1272 /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */
1273 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1274 HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */
1275 0, /* rightshift */
1276 1, /* size (0 = byte, 1 = short, 2 = long) */
1277 16, /* bitsize */
1278 FALSE, /* pc_relative */
1279 0, /* bitpos */
1280 complain_overflow_dont, /* complain_on_overflow */
1281 ppc64_elf_unhandled_reloc, /* special_function */
1282 "R_PPC64_PLTGOT16_LO_DS",/* name */
1283 FALSE, /* partial_inplace */
1284 0, /* src_mask */
1285 0xfffc, /* dst_mask */
1286 FALSE), /* pcrel_offset */
1287
1288 /* Marker relocs for TLS. */
1289 HOWTO (R_PPC64_TLS,
1290 0, /* rightshift */
1291 2, /* size (0 = byte, 1 = short, 2 = long) */
1292 32, /* bitsize */
1293 FALSE, /* pc_relative */
1294 0, /* bitpos */
1295 complain_overflow_dont, /* complain_on_overflow */
1296 bfd_elf_generic_reloc, /* special_function */
1297 "R_PPC64_TLS", /* name */
1298 FALSE, /* partial_inplace */
1299 0, /* src_mask */
1300 0, /* dst_mask */
1301 FALSE), /* pcrel_offset */
1302
1303 HOWTO (R_PPC64_TLSGD,
1304 0, /* rightshift */
1305 2, /* size (0 = byte, 1 = short, 2 = long) */
1306 32, /* bitsize */
1307 FALSE, /* pc_relative */
1308 0, /* bitpos */
1309 complain_overflow_dont, /* complain_on_overflow */
1310 bfd_elf_generic_reloc, /* special_function */
1311 "R_PPC64_TLSGD", /* name */
1312 FALSE, /* partial_inplace */
1313 0, /* src_mask */
1314 0, /* dst_mask */
1315 FALSE), /* pcrel_offset */
1316
1317 HOWTO (R_PPC64_TLSLD,
1318 0, /* rightshift */
1319 2, /* size (0 = byte, 1 = short, 2 = long) */
1320 32, /* bitsize */
1321 FALSE, /* pc_relative */
1322 0, /* bitpos */
1323 complain_overflow_dont, /* complain_on_overflow */
1324 bfd_elf_generic_reloc, /* special_function */
1325 "R_PPC64_TLSLD", /* name */
1326 FALSE, /* partial_inplace */
1327 0, /* src_mask */
1328 0, /* dst_mask */
1329 FALSE), /* pcrel_offset */
1330
1331 HOWTO (R_PPC64_TOCSAVE,
1332 0, /* rightshift */
1333 2, /* size (0 = byte, 1 = short, 2 = long) */
1334 32, /* bitsize */
1335 FALSE, /* pc_relative */
1336 0, /* bitpos */
1337 complain_overflow_dont, /* complain_on_overflow */
1338 bfd_elf_generic_reloc, /* special_function */
1339 "R_PPC64_TOCSAVE", /* name */
1340 FALSE, /* partial_inplace */
1341 0, /* src_mask */
1342 0, /* dst_mask */
1343 FALSE), /* pcrel_offset */
1344
1345 /* Computes the load module index of the load module that contains the
1346 definition of its TLS sym. */
1347 HOWTO (R_PPC64_DTPMOD64,
1348 0, /* rightshift */
1349 4, /* size (0 = byte, 1 = short, 2 = long) */
1350 64, /* bitsize */
1351 FALSE, /* pc_relative */
1352 0, /* bitpos */
1353 complain_overflow_dont, /* complain_on_overflow */
1354 ppc64_elf_unhandled_reloc, /* special_function */
1355 "R_PPC64_DTPMOD64", /* name */
1356 FALSE, /* partial_inplace */
1357 0, /* src_mask */
1358 ONES (64), /* dst_mask */
1359 FALSE), /* pcrel_offset */
1360
1361 /* Computes a dtv-relative displacement, the difference between the value
1362 of sym+add and the base address of the thread-local storage block that
1363 contains the definition of sym, minus 0x8000. */
1364 HOWTO (R_PPC64_DTPREL64,
1365 0, /* rightshift */
1366 4, /* size (0 = byte, 1 = short, 2 = long) */
1367 64, /* bitsize */
1368 FALSE, /* pc_relative */
1369 0, /* bitpos */
1370 complain_overflow_dont, /* complain_on_overflow */
1371 ppc64_elf_unhandled_reloc, /* special_function */
1372 "R_PPC64_DTPREL64", /* name */
1373 FALSE, /* partial_inplace */
1374 0, /* src_mask */
1375 ONES (64), /* dst_mask */
1376 FALSE), /* pcrel_offset */
1377
1378 /* A 16 bit dtprel reloc. */
1379 HOWTO (R_PPC64_DTPREL16,
1380 0, /* rightshift */
1381 1, /* size (0 = byte, 1 = short, 2 = long) */
1382 16, /* bitsize */
1383 FALSE, /* pc_relative */
1384 0, /* bitpos */
1385 complain_overflow_signed, /* complain_on_overflow */
1386 ppc64_elf_unhandled_reloc, /* special_function */
1387 "R_PPC64_DTPREL16", /* name */
1388 FALSE, /* partial_inplace */
1389 0, /* src_mask */
1390 0xffff, /* dst_mask */
1391 FALSE), /* pcrel_offset */
1392
1393 /* Like DTPREL16, but no overflow. */
1394 HOWTO (R_PPC64_DTPREL16_LO,
1395 0, /* rightshift */
1396 1, /* size (0 = byte, 1 = short, 2 = long) */
1397 16, /* bitsize */
1398 FALSE, /* pc_relative */
1399 0, /* bitpos */
1400 complain_overflow_dont, /* complain_on_overflow */
1401 ppc64_elf_unhandled_reloc, /* special_function */
1402 "R_PPC64_DTPREL16_LO", /* name */
1403 FALSE, /* partial_inplace */
1404 0, /* src_mask */
1405 0xffff, /* dst_mask */
1406 FALSE), /* pcrel_offset */
1407
1408 /* Like DTPREL16_LO, but next higher group of 16 bits. */
1409 HOWTO (R_PPC64_DTPREL16_HI,
1410 16, /* rightshift */
1411 1, /* size (0 = byte, 1 = short, 2 = long) */
1412 16, /* bitsize */
1413 FALSE, /* pc_relative */
1414 0, /* bitpos */
1415 complain_overflow_signed, /* complain_on_overflow */
1416 ppc64_elf_unhandled_reloc, /* special_function */
1417 "R_PPC64_DTPREL16_HI", /* name */
1418 FALSE, /* partial_inplace */
1419 0, /* src_mask */
1420 0xffff, /* dst_mask */
1421 FALSE), /* pcrel_offset */
1422
1423 /* Like DTPREL16_HI, but adjust for low 16 bits. */
1424 HOWTO (R_PPC64_DTPREL16_HA,
1425 16, /* rightshift */
1426 1, /* size (0 = byte, 1 = short, 2 = long) */
1427 16, /* bitsize */
1428 FALSE, /* pc_relative */
1429 0, /* bitpos */
1430 complain_overflow_signed, /* complain_on_overflow */
1431 ppc64_elf_unhandled_reloc, /* special_function */
1432 "R_PPC64_DTPREL16_HA", /* name */
1433 FALSE, /* partial_inplace */
1434 0, /* src_mask */
1435 0xffff, /* dst_mask */
1436 FALSE), /* pcrel_offset */
1437
1438 /* Like DTPREL16_HI, but next higher group of 16 bits. */
1439 HOWTO (R_PPC64_DTPREL16_HIGHER,
1440 32, /* rightshift */
1441 1, /* size (0 = byte, 1 = short, 2 = long) */
1442 16, /* bitsize */
1443 FALSE, /* pc_relative */
1444 0, /* bitpos */
1445 complain_overflow_dont, /* complain_on_overflow */
1446 ppc64_elf_unhandled_reloc, /* special_function */
1447 "R_PPC64_DTPREL16_HIGHER", /* name */
1448 FALSE, /* partial_inplace */
1449 0, /* src_mask */
1450 0xffff, /* dst_mask */
1451 FALSE), /* pcrel_offset */
1452
1453 /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */
1454 HOWTO (R_PPC64_DTPREL16_HIGHERA,
1455 32, /* rightshift */
1456 1, /* size (0 = byte, 1 = short, 2 = long) */
1457 16, /* bitsize */
1458 FALSE, /* pc_relative */
1459 0, /* bitpos */
1460 complain_overflow_dont, /* complain_on_overflow */
1461 ppc64_elf_unhandled_reloc, /* special_function */
1462 "R_PPC64_DTPREL16_HIGHERA", /* name */
1463 FALSE, /* partial_inplace */
1464 0, /* src_mask */
1465 0xffff, /* dst_mask */
1466 FALSE), /* pcrel_offset */
1467
1468 /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */
1469 HOWTO (R_PPC64_DTPREL16_HIGHEST,
1470 48, /* rightshift */
1471 1, /* size (0 = byte, 1 = short, 2 = long) */
1472 16, /* bitsize */
1473 FALSE, /* pc_relative */
1474 0, /* bitpos */
1475 complain_overflow_dont, /* complain_on_overflow */
1476 ppc64_elf_unhandled_reloc, /* special_function */
1477 "R_PPC64_DTPREL16_HIGHEST", /* name */
1478 FALSE, /* partial_inplace */
1479 0, /* src_mask */
1480 0xffff, /* dst_mask */
1481 FALSE), /* pcrel_offset */
1482
1483 /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */
1484 HOWTO (R_PPC64_DTPREL16_HIGHESTA,
1485 48, /* rightshift */
1486 1, /* size (0 = byte, 1 = short, 2 = long) */
1487 16, /* bitsize */
1488 FALSE, /* pc_relative */
1489 0, /* bitpos */
1490 complain_overflow_dont, /* complain_on_overflow */
1491 ppc64_elf_unhandled_reloc, /* special_function */
1492 "R_PPC64_DTPREL16_HIGHESTA", /* name */
1493 FALSE, /* partial_inplace */
1494 0, /* src_mask */
1495 0xffff, /* dst_mask */
1496 FALSE), /* pcrel_offset */
1497
1498 /* Like DTPREL16, but for insns with a DS field. */
1499 HOWTO (R_PPC64_DTPREL16_DS,
1500 0, /* rightshift */
1501 1, /* size (0 = byte, 1 = short, 2 = long) */
1502 16, /* bitsize */
1503 FALSE, /* pc_relative */
1504 0, /* bitpos */
1505 complain_overflow_signed, /* complain_on_overflow */
1506 ppc64_elf_unhandled_reloc, /* special_function */
1507 "R_PPC64_DTPREL16_DS", /* name */
1508 FALSE, /* partial_inplace */
1509 0, /* src_mask */
1510 0xfffc, /* dst_mask */
1511 FALSE), /* pcrel_offset */
1512
1513 /* Like DTPREL16_DS, but no overflow. */
1514 HOWTO (R_PPC64_DTPREL16_LO_DS,
1515 0, /* rightshift */
1516 1, /* size (0 = byte, 1 = short, 2 = long) */
1517 16, /* bitsize */
1518 FALSE, /* pc_relative */
1519 0, /* bitpos */
1520 complain_overflow_dont, /* complain_on_overflow */
1521 ppc64_elf_unhandled_reloc, /* special_function */
1522 "R_PPC64_DTPREL16_LO_DS", /* name */
1523 FALSE, /* partial_inplace */
1524 0, /* src_mask */
1525 0xfffc, /* dst_mask */
1526 FALSE), /* pcrel_offset */
1527
1528 /* Computes a tp-relative displacement, the difference between the value of
1529 sym+add and the value of the thread pointer (r13). */
1530 HOWTO (R_PPC64_TPREL64,
1531 0, /* rightshift */
1532 4, /* size (0 = byte, 1 = short, 2 = long) */
1533 64, /* bitsize */
1534 FALSE, /* pc_relative */
1535 0, /* bitpos */
1536 complain_overflow_dont, /* complain_on_overflow */
1537 ppc64_elf_unhandled_reloc, /* special_function */
1538 "R_PPC64_TPREL64", /* name */
1539 FALSE, /* partial_inplace */
1540 0, /* src_mask */
1541 ONES (64), /* dst_mask */
1542 FALSE), /* pcrel_offset */
1543
1544 /* A 16 bit tprel reloc. */
1545 HOWTO (R_PPC64_TPREL16,
1546 0, /* rightshift */
1547 1, /* size (0 = byte, 1 = short, 2 = long) */
1548 16, /* bitsize */
1549 FALSE, /* pc_relative */
1550 0, /* bitpos */
1551 complain_overflow_signed, /* complain_on_overflow */
1552 ppc64_elf_unhandled_reloc, /* special_function */
1553 "R_PPC64_TPREL16", /* name */
1554 FALSE, /* partial_inplace */
1555 0, /* src_mask */
1556 0xffff, /* dst_mask */
1557 FALSE), /* pcrel_offset */
1558
1559 /* Like TPREL16, but no overflow. */
1560 HOWTO (R_PPC64_TPREL16_LO,
1561 0, /* rightshift */
1562 1, /* size (0 = byte, 1 = short, 2 = long) */
1563 16, /* bitsize */
1564 FALSE, /* pc_relative */
1565 0, /* bitpos */
1566 complain_overflow_dont, /* complain_on_overflow */
1567 ppc64_elf_unhandled_reloc, /* special_function */
1568 "R_PPC64_TPREL16_LO", /* name */
1569 FALSE, /* partial_inplace */
1570 0, /* src_mask */
1571 0xffff, /* dst_mask */
1572 FALSE), /* pcrel_offset */
1573
1574 /* Like TPREL16_LO, but next higher group of 16 bits. */
1575 HOWTO (R_PPC64_TPREL16_HI,
1576 16, /* rightshift */
1577 1, /* size (0 = byte, 1 = short, 2 = long) */
1578 16, /* bitsize */
1579 FALSE, /* pc_relative */
1580 0, /* bitpos */
1581 complain_overflow_signed, /* complain_on_overflow */
1582 ppc64_elf_unhandled_reloc, /* special_function */
1583 "R_PPC64_TPREL16_HI", /* name */
1584 FALSE, /* partial_inplace */
1585 0, /* src_mask */
1586 0xffff, /* dst_mask */
1587 FALSE), /* pcrel_offset */
1588
1589 /* Like TPREL16_HI, but adjust for low 16 bits. */
1590 HOWTO (R_PPC64_TPREL16_HA,
1591 16, /* rightshift */
1592 1, /* size (0 = byte, 1 = short, 2 = long) */
1593 16, /* bitsize */
1594 FALSE, /* pc_relative */
1595 0, /* bitpos */
1596 complain_overflow_signed, /* complain_on_overflow */
1597 ppc64_elf_unhandled_reloc, /* special_function */
1598 "R_PPC64_TPREL16_HA", /* name */
1599 FALSE, /* partial_inplace */
1600 0, /* src_mask */
1601 0xffff, /* dst_mask */
1602 FALSE), /* pcrel_offset */
1603
1604 /* Like TPREL16_HI, but next higher group of 16 bits. */
1605 HOWTO (R_PPC64_TPREL16_HIGHER,
1606 32, /* rightshift */
1607 1, /* size (0 = byte, 1 = short, 2 = long) */
1608 16, /* bitsize */
1609 FALSE, /* pc_relative */
1610 0, /* bitpos */
1611 complain_overflow_dont, /* complain_on_overflow */
1612 ppc64_elf_unhandled_reloc, /* special_function */
1613 "R_PPC64_TPREL16_HIGHER", /* name */
1614 FALSE, /* partial_inplace */
1615 0, /* src_mask */
1616 0xffff, /* dst_mask */
1617 FALSE), /* pcrel_offset */
1618
1619 /* Like TPREL16_HIGHER, but adjust for low 16 bits. */
1620 HOWTO (R_PPC64_TPREL16_HIGHERA,
1621 32, /* rightshift */
1622 1, /* size (0 = byte, 1 = short, 2 = long) */
1623 16, /* bitsize */
1624 FALSE, /* pc_relative */
1625 0, /* bitpos */
1626 complain_overflow_dont, /* complain_on_overflow */
1627 ppc64_elf_unhandled_reloc, /* special_function */
1628 "R_PPC64_TPREL16_HIGHERA", /* name */
1629 FALSE, /* partial_inplace */
1630 0, /* src_mask */
1631 0xffff, /* dst_mask */
1632 FALSE), /* pcrel_offset */
1633
1634 /* Like TPREL16_HIGHER, but next higher group of 16 bits. */
1635 HOWTO (R_PPC64_TPREL16_HIGHEST,
1636 48, /* rightshift */
1637 1, /* size (0 = byte, 1 = short, 2 = long) */
1638 16, /* bitsize */
1639 FALSE, /* pc_relative */
1640 0, /* bitpos */
1641 complain_overflow_dont, /* complain_on_overflow */
1642 ppc64_elf_unhandled_reloc, /* special_function */
1643 "R_PPC64_TPREL16_HIGHEST", /* name */
1644 FALSE, /* partial_inplace */
1645 0, /* src_mask */
1646 0xffff, /* dst_mask */
1647 FALSE), /* pcrel_offset */
1648
1649 /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */
1650 HOWTO (R_PPC64_TPREL16_HIGHESTA,
1651 48, /* rightshift */
1652 1, /* size (0 = byte, 1 = short, 2 = long) */
1653 16, /* bitsize */
1654 FALSE, /* pc_relative */
1655 0, /* bitpos */
1656 complain_overflow_dont, /* complain_on_overflow */
1657 ppc64_elf_unhandled_reloc, /* special_function */
1658 "R_PPC64_TPREL16_HIGHESTA", /* name */
1659 FALSE, /* partial_inplace */
1660 0, /* src_mask */
1661 0xffff, /* dst_mask */
1662 FALSE), /* pcrel_offset */
1663
1664 /* Like TPREL16, but for insns with a DS field. */
1665 HOWTO (R_PPC64_TPREL16_DS,
1666 0, /* rightshift */
1667 1, /* size (0 = byte, 1 = short, 2 = long) */
1668 16, /* bitsize */
1669 FALSE, /* pc_relative */
1670 0, /* bitpos */
1671 complain_overflow_signed, /* complain_on_overflow */
1672 ppc64_elf_unhandled_reloc, /* special_function */
1673 "R_PPC64_TPREL16_DS", /* name */
1674 FALSE, /* partial_inplace */
1675 0, /* src_mask */
1676 0xfffc, /* dst_mask */
1677 FALSE), /* pcrel_offset */
1678
1679 /* Like TPREL16_DS, but no overflow. */
1680 HOWTO (R_PPC64_TPREL16_LO_DS,
1681 0, /* rightshift */
1682 1, /* size (0 = byte, 1 = short, 2 = long) */
1683 16, /* bitsize */
1684 FALSE, /* pc_relative */
1685 0, /* bitpos */
1686 complain_overflow_dont, /* complain_on_overflow */
1687 ppc64_elf_unhandled_reloc, /* special_function */
1688 "R_PPC64_TPREL16_LO_DS", /* name */
1689 FALSE, /* partial_inplace */
1690 0, /* src_mask */
1691 0xfffc, /* dst_mask */
1692 FALSE), /* pcrel_offset */
1693
1694 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1695 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1696 to the first entry relative to the TOC base (r2). */
1697 HOWTO (R_PPC64_GOT_TLSGD16,
1698 0, /* rightshift */
1699 1, /* size (0 = byte, 1 = short, 2 = long) */
1700 16, /* bitsize */
1701 FALSE, /* pc_relative */
1702 0, /* bitpos */
1703 complain_overflow_signed, /* complain_on_overflow */
1704 ppc64_elf_unhandled_reloc, /* special_function */
1705 "R_PPC64_GOT_TLSGD16", /* name */
1706 FALSE, /* partial_inplace */
1707 0, /* src_mask */
1708 0xffff, /* dst_mask */
1709 FALSE), /* pcrel_offset */
1710
1711 /* Like GOT_TLSGD16, but no overflow. */
1712 HOWTO (R_PPC64_GOT_TLSGD16_LO,
1713 0, /* rightshift */
1714 1, /* size (0 = byte, 1 = short, 2 = long) */
1715 16, /* bitsize */
1716 FALSE, /* pc_relative */
1717 0, /* bitpos */
1718 complain_overflow_dont, /* complain_on_overflow */
1719 ppc64_elf_unhandled_reloc, /* special_function */
1720 "R_PPC64_GOT_TLSGD16_LO", /* name */
1721 FALSE, /* partial_inplace */
1722 0, /* src_mask */
1723 0xffff, /* dst_mask */
1724 FALSE), /* pcrel_offset */
1725
1726 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1727 HOWTO (R_PPC64_GOT_TLSGD16_HI,
1728 16, /* rightshift */
1729 1, /* size (0 = byte, 1 = short, 2 = long) */
1730 16, /* bitsize */
1731 FALSE, /* pc_relative */
1732 0, /* bitpos */
1733 complain_overflow_signed, /* complain_on_overflow */
1734 ppc64_elf_unhandled_reloc, /* special_function */
1735 "R_PPC64_GOT_TLSGD16_HI", /* name */
1736 FALSE, /* partial_inplace */
1737 0, /* src_mask */
1738 0xffff, /* dst_mask */
1739 FALSE), /* pcrel_offset */
1740
1741 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1742 HOWTO (R_PPC64_GOT_TLSGD16_HA,
1743 16, /* rightshift */
1744 1, /* size (0 = byte, 1 = short, 2 = long) */
1745 16, /* bitsize */
1746 FALSE, /* pc_relative */
1747 0, /* bitpos */
1748 complain_overflow_signed, /* complain_on_overflow */
1749 ppc64_elf_unhandled_reloc, /* special_function */
1750 "R_PPC64_GOT_TLSGD16_HA", /* name */
1751 FALSE, /* partial_inplace */
1752 0, /* src_mask */
1753 0xffff, /* dst_mask */
1754 FALSE), /* pcrel_offset */
1755
1756 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1757 with values (sym+add)@dtpmod and zero, and computes the offset to the
1758 first entry relative to the TOC base (r2). */
1759 HOWTO (R_PPC64_GOT_TLSLD16,
1760 0, /* rightshift */
1761 1, /* size (0 = byte, 1 = short, 2 = long) */
1762 16, /* bitsize */
1763 FALSE, /* pc_relative */
1764 0, /* bitpos */
1765 complain_overflow_signed, /* complain_on_overflow */
1766 ppc64_elf_unhandled_reloc, /* special_function */
1767 "R_PPC64_GOT_TLSLD16", /* name */
1768 FALSE, /* partial_inplace */
1769 0, /* src_mask */
1770 0xffff, /* dst_mask */
1771 FALSE), /* pcrel_offset */
1772
1773 /* Like GOT_TLSLD16, but no overflow. */
1774 HOWTO (R_PPC64_GOT_TLSLD16_LO,
1775 0, /* rightshift */
1776 1, /* size (0 = byte, 1 = short, 2 = long) */
1777 16, /* bitsize */
1778 FALSE, /* pc_relative */
1779 0, /* bitpos */
1780 complain_overflow_dont, /* complain_on_overflow */
1781 ppc64_elf_unhandled_reloc, /* special_function */
1782 "R_PPC64_GOT_TLSLD16_LO", /* name */
1783 FALSE, /* partial_inplace */
1784 0, /* src_mask */
1785 0xffff, /* dst_mask */
1786 FALSE), /* pcrel_offset */
1787
1788 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1789 HOWTO (R_PPC64_GOT_TLSLD16_HI,
1790 16, /* rightshift */
1791 1, /* size (0 = byte, 1 = short, 2 = long) */
1792 16, /* bitsize */
1793 FALSE, /* pc_relative */
1794 0, /* bitpos */
1795 complain_overflow_signed, /* complain_on_overflow */
1796 ppc64_elf_unhandled_reloc, /* special_function */
1797 "R_PPC64_GOT_TLSLD16_HI", /* name */
1798 FALSE, /* partial_inplace */
1799 0, /* src_mask */
1800 0xffff, /* dst_mask */
1801 FALSE), /* pcrel_offset */
1802
1803 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1804 HOWTO (R_PPC64_GOT_TLSLD16_HA,
1805 16, /* rightshift */
1806 1, /* size (0 = byte, 1 = short, 2 = long) */
1807 16, /* bitsize */
1808 FALSE, /* pc_relative */
1809 0, /* bitpos */
1810 complain_overflow_signed, /* complain_on_overflow */
1811 ppc64_elf_unhandled_reloc, /* special_function */
1812 "R_PPC64_GOT_TLSLD16_HA", /* name */
1813 FALSE, /* partial_inplace */
1814 0, /* src_mask */
1815 0xffff, /* dst_mask */
1816 FALSE), /* pcrel_offset */
1817
1818 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1819 the offset to the entry relative to the TOC base (r2). */
1820 HOWTO (R_PPC64_GOT_DTPREL16_DS,
1821 0, /* rightshift */
1822 1, /* size (0 = byte, 1 = short, 2 = long) */
1823 16, /* bitsize */
1824 FALSE, /* pc_relative */
1825 0, /* bitpos */
1826 complain_overflow_signed, /* complain_on_overflow */
1827 ppc64_elf_unhandled_reloc, /* special_function */
1828 "R_PPC64_GOT_DTPREL16_DS", /* name */
1829 FALSE, /* partial_inplace */
1830 0, /* src_mask */
1831 0xfffc, /* dst_mask */
1832 FALSE), /* pcrel_offset */
1833
1834 /* Like GOT_DTPREL16_DS, but no overflow. */
1835 HOWTO (R_PPC64_GOT_DTPREL16_LO_DS,
1836 0, /* rightshift */
1837 1, /* size (0 = byte, 1 = short, 2 = long) */
1838 16, /* bitsize */
1839 FALSE, /* pc_relative */
1840 0, /* bitpos */
1841 complain_overflow_dont, /* complain_on_overflow */
1842 ppc64_elf_unhandled_reloc, /* special_function */
1843 "R_PPC64_GOT_DTPREL16_LO_DS", /* name */
1844 FALSE, /* partial_inplace */
1845 0, /* src_mask */
1846 0xfffc, /* dst_mask */
1847 FALSE), /* pcrel_offset */
1848
1849 /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */
1850 HOWTO (R_PPC64_GOT_DTPREL16_HI,
1851 16, /* rightshift */
1852 1, /* size (0 = byte, 1 = short, 2 = long) */
1853 16, /* bitsize */
1854 FALSE, /* pc_relative */
1855 0, /* bitpos */
1856 complain_overflow_signed, /* complain_on_overflow */
1857 ppc64_elf_unhandled_reloc, /* special_function */
1858 "R_PPC64_GOT_DTPREL16_HI", /* name */
1859 FALSE, /* partial_inplace */
1860 0, /* src_mask */
1861 0xffff, /* dst_mask */
1862 FALSE), /* pcrel_offset */
1863
1864 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1865 HOWTO (R_PPC64_GOT_DTPREL16_HA,
1866 16, /* rightshift */
1867 1, /* size (0 = byte, 1 = short, 2 = long) */
1868 16, /* bitsize */
1869 FALSE, /* pc_relative */
1870 0, /* bitpos */
1871 complain_overflow_signed, /* complain_on_overflow */
1872 ppc64_elf_unhandled_reloc, /* special_function */
1873 "R_PPC64_GOT_DTPREL16_HA", /* name */
1874 FALSE, /* partial_inplace */
1875 0, /* src_mask */
1876 0xffff, /* dst_mask */
1877 FALSE), /* pcrel_offset */
1878
1879 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1880 offset to the entry relative to the TOC base (r2). */
1881 HOWTO (R_PPC64_GOT_TPREL16_DS,
1882 0, /* rightshift */
1883 1, /* size (0 = byte, 1 = short, 2 = long) */
1884 16, /* bitsize */
1885 FALSE, /* pc_relative */
1886 0, /* bitpos */
1887 complain_overflow_signed, /* complain_on_overflow */
1888 ppc64_elf_unhandled_reloc, /* special_function */
1889 "R_PPC64_GOT_TPREL16_DS", /* name */
1890 FALSE, /* partial_inplace */
1891 0, /* src_mask */
1892 0xfffc, /* dst_mask */
1893 FALSE), /* pcrel_offset */
1894
1895 /* Like GOT_TPREL16_DS, but no overflow. */
1896 HOWTO (R_PPC64_GOT_TPREL16_LO_DS,
1897 0, /* rightshift */
1898 1, /* size (0 = byte, 1 = short, 2 = long) */
1899 16, /* bitsize */
1900 FALSE, /* pc_relative */
1901 0, /* bitpos */
1902 complain_overflow_dont, /* complain_on_overflow */
1903 ppc64_elf_unhandled_reloc, /* special_function */
1904 "R_PPC64_GOT_TPREL16_LO_DS", /* name */
1905 FALSE, /* partial_inplace */
1906 0, /* src_mask */
1907 0xfffc, /* dst_mask */
1908 FALSE), /* pcrel_offset */
1909
1910 /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */
1911 HOWTO (R_PPC64_GOT_TPREL16_HI,
1912 16, /* rightshift */
1913 1, /* size (0 = byte, 1 = short, 2 = long) */
1914 16, /* bitsize */
1915 FALSE, /* pc_relative */
1916 0, /* bitpos */
1917 complain_overflow_signed, /* complain_on_overflow */
1918 ppc64_elf_unhandled_reloc, /* special_function */
1919 "R_PPC64_GOT_TPREL16_HI", /* name */
1920 FALSE, /* partial_inplace */
1921 0, /* src_mask */
1922 0xffff, /* dst_mask */
1923 FALSE), /* pcrel_offset */
1924
1925 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1926 HOWTO (R_PPC64_GOT_TPREL16_HA,
1927 16, /* rightshift */
1928 1, /* size (0 = byte, 1 = short, 2 = long) */
1929 16, /* bitsize */
1930 FALSE, /* pc_relative */
1931 0, /* bitpos */
1932 complain_overflow_signed, /* complain_on_overflow */
1933 ppc64_elf_unhandled_reloc, /* special_function */
1934 "R_PPC64_GOT_TPREL16_HA", /* name */
1935 FALSE, /* partial_inplace */
1936 0, /* src_mask */
1937 0xffff, /* dst_mask */
1938 FALSE), /* pcrel_offset */
1939
1940 HOWTO (R_PPC64_JMP_IREL, /* type */
1941 0, /* rightshift */
1942 0, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1943 0, /* bitsize */
1944 FALSE, /* pc_relative */
1945 0, /* bitpos */
1946 complain_overflow_dont, /* complain_on_overflow */
1947 ppc64_elf_unhandled_reloc, /* special_function */
1948 "R_PPC64_JMP_IREL", /* name */
1949 FALSE, /* partial_inplace */
1950 0, /* src_mask */
1951 0, /* dst_mask */
1952 FALSE), /* pcrel_offset */
1953
1954 HOWTO (R_PPC64_IRELATIVE, /* type */
1955 0, /* rightshift */
1956 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1957 64, /* bitsize */
1958 FALSE, /* pc_relative */
1959 0, /* bitpos */
1960 complain_overflow_dont, /* complain_on_overflow */
1961 bfd_elf_generic_reloc, /* special_function */
1962 "R_PPC64_IRELATIVE", /* name */
1963 FALSE, /* partial_inplace */
1964 0, /* src_mask */
1965 ONES (64), /* dst_mask */
1966 FALSE), /* pcrel_offset */
1967
1968 /* A 16 bit relative relocation. */
1969 HOWTO (R_PPC64_REL16, /* type */
1970 0, /* rightshift */
1971 1, /* size (0 = byte, 1 = short, 2 = long) */
1972 16, /* bitsize */
1973 TRUE, /* pc_relative */
1974 0, /* bitpos */
1975 complain_overflow_signed, /* complain_on_overflow */
1976 bfd_elf_generic_reloc, /* special_function */
1977 "R_PPC64_REL16", /* name */
1978 FALSE, /* partial_inplace */
1979 0, /* src_mask */
1980 0xffff, /* dst_mask */
1981 TRUE), /* pcrel_offset */
1982
1983 /* A 16 bit relative relocation without overflow. */
1984 HOWTO (R_PPC64_REL16_LO, /* type */
1985 0, /* rightshift */
1986 1, /* size (0 = byte, 1 = short, 2 = long) */
1987 16, /* bitsize */
1988 TRUE, /* pc_relative */
1989 0, /* bitpos */
1990 complain_overflow_dont,/* complain_on_overflow */
1991 bfd_elf_generic_reloc, /* special_function */
1992 "R_PPC64_REL16_LO", /* name */
1993 FALSE, /* partial_inplace */
1994 0, /* src_mask */
1995 0xffff, /* dst_mask */
1996 TRUE), /* pcrel_offset */
1997
1998 /* The high order 16 bits of a relative address. */
1999 HOWTO (R_PPC64_REL16_HI, /* type */
2000 16, /* rightshift */
2001 1, /* size (0 = byte, 1 = short, 2 = long) */
2002 16, /* bitsize */
2003 TRUE, /* pc_relative */
2004 0, /* bitpos */
2005 complain_overflow_signed, /* complain_on_overflow */
2006 bfd_elf_generic_reloc, /* special_function */
2007 "R_PPC64_REL16_HI", /* name */
2008 FALSE, /* partial_inplace */
2009 0, /* src_mask */
2010 0xffff, /* dst_mask */
2011 TRUE), /* pcrel_offset */
2012
2013 /* The high order 16 bits of a relative address, plus 1 if the contents of
2014 the low 16 bits, treated as a signed number, is negative. */
2015 HOWTO (R_PPC64_REL16_HA, /* type */
2016 16, /* rightshift */
2017 1, /* size (0 = byte, 1 = short, 2 = long) */
2018 16, /* bitsize */
2019 TRUE, /* pc_relative */
2020 0, /* bitpos */
2021 complain_overflow_signed, /* complain_on_overflow */
2022 ppc64_elf_ha_reloc, /* special_function */
2023 "R_PPC64_REL16_HA", /* name */
2024 FALSE, /* partial_inplace */
2025 0, /* src_mask */
2026 0xffff, /* dst_mask */
2027 TRUE), /* pcrel_offset */
2028
2029 /* Like R_PPC64_REL16_HA but for split field in addpcis. */
2030 HOWTO (R_PPC64_REL16DX_HA, /* type */
2031 16, /* rightshift */
2032 2, /* size (0 = byte, 1 = short, 2 = long) */
2033 16, /* bitsize */
2034 TRUE, /* pc_relative */
2035 0, /* bitpos */
2036 complain_overflow_signed, /* complain_on_overflow */
2037 ppc64_elf_ha_reloc, /* special_function */
2038 "R_PPC64_REL16DX_HA", /* name */
2039 FALSE, /* partial_inplace */
2040 0, /* src_mask */
2041 0x1fffc1, /* dst_mask */
2042 TRUE), /* pcrel_offset */
2043
2044 /* Like R_PPC64_ADDR16_HI, but no overflow. */
2045 HOWTO (R_PPC64_ADDR16_HIGH, /* type */
2046 16, /* rightshift */
2047 1, /* size (0 = byte, 1 = short, 2 = long) */
2048 16, /* bitsize */
2049 FALSE, /* pc_relative */
2050 0, /* bitpos */
2051 complain_overflow_dont, /* complain_on_overflow */
2052 bfd_elf_generic_reloc, /* special_function */
2053 "R_PPC64_ADDR16_HIGH", /* name */
2054 FALSE, /* partial_inplace */
2055 0, /* src_mask */
2056 0xffff, /* dst_mask */
2057 FALSE), /* pcrel_offset */
2058
2059 /* Like R_PPC64_ADDR16_HA, but no overflow. */
2060 HOWTO (R_PPC64_ADDR16_HIGHA, /* type */
2061 16, /* rightshift */
2062 1, /* size (0 = byte, 1 = short, 2 = long) */
2063 16, /* bitsize */
2064 FALSE, /* pc_relative */
2065 0, /* bitpos */
2066 complain_overflow_dont, /* complain_on_overflow */
2067 ppc64_elf_ha_reloc, /* special_function */
2068 "R_PPC64_ADDR16_HIGHA", /* name */
2069 FALSE, /* partial_inplace */
2070 0, /* src_mask */
2071 0xffff, /* dst_mask */
2072 FALSE), /* pcrel_offset */
2073
2074 /* Like R_PPC64_DTPREL16_HI, but no overflow. */
2075 HOWTO (R_PPC64_DTPREL16_HIGH,
2076 16, /* rightshift */
2077 1, /* size (0 = byte, 1 = short, 2 = long) */
2078 16, /* bitsize */
2079 FALSE, /* pc_relative */
2080 0, /* bitpos */
2081 complain_overflow_dont, /* complain_on_overflow */
2082 ppc64_elf_unhandled_reloc, /* special_function */
2083 "R_PPC64_DTPREL16_HIGH", /* name */
2084 FALSE, /* partial_inplace */
2085 0, /* src_mask */
2086 0xffff, /* dst_mask */
2087 FALSE), /* pcrel_offset */
2088
2089 /* Like R_PPC64_DTPREL16_HA, but no overflow. */
2090 HOWTO (R_PPC64_DTPREL16_HIGHA,
2091 16, /* rightshift */
2092 1, /* size (0 = byte, 1 = short, 2 = long) */
2093 16, /* bitsize */
2094 FALSE, /* pc_relative */
2095 0, /* bitpos */
2096 complain_overflow_dont, /* complain_on_overflow */
2097 ppc64_elf_unhandled_reloc, /* special_function */
2098 "R_PPC64_DTPREL16_HIGHA", /* name */
2099 FALSE, /* partial_inplace */
2100 0, /* src_mask */
2101 0xffff, /* dst_mask */
2102 FALSE), /* pcrel_offset */
2103
2104 /* Like R_PPC64_TPREL16_HI, but no overflow. */
2105 HOWTO (R_PPC64_TPREL16_HIGH,
2106 16, /* rightshift */
2107 1, /* size (0 = byte, 1 = short, 2 = long) */
2108 16, /* bitsize */
2109 FALSE, /* pc_relative */
2110 0, /* bitpos */
2111 complain_overflow_dont, /* complain_on_overflow */
2112 ppc64_elf_unhandled_reloc, /* special_function */
2113 "R_PPC64_TPREL16_HIGH", /* name */
2114 FALSE, /* partial_inplace */
2115 0, /* src_mask */
2116 0xffff, /* dst_mask */
2117 FALSE), /* pcrel_offset */
2118
2119 /* Like R_PPC64_TPREL16_HA, but no overflow. */
2120 HOWTO (R_PPC64_TPREL16_HIGHA,
2121 16, /* rightshift */
2122 1, /* size (0 = byte, 1 = short, 2 = long) */
2123 16, /* bitsize */
2124 FALSE, /* pc_relative */
2125 0, /* bitpos */
2126 complain_overflow_dont, /* complain_on_overflow */
2127 ppc64_elf_unhandled_reloc, /* special_function */
2128 "R_PPC64_TPREL16_HIGHA", /* name */
2129 FALSE, /* partial_inplace */
2130 0, /* src_mask */
2131 0xffff, /* dst_mask */
2132 FALSE), /* pcrel_offset */
2133
2134 /* Marker reloc on ELFv2 large-model function entry. */
2135 HOWTO (R_PPC64_ENTRY,
2136 0, /* rightshift */
2137 2, /* size (0 = byte, 1 = short, 2 = long) */
2138 32, /* bitsize */
2139 FALSE, /* pc_relative */
2140 0, /* bitpos */
2141 complain_overflow_dont, /* complain_on_overflow */
2142 bfd_elf_generic_reloc, /* special_function */
2143 "R_PPC64_ENTRY", /* name */
2144 FALSE, /* partial_inplace */
2145 0, /* src_mask */
2146 0, /* dst_mask */
2147 FALSE), /* pcrel_offset */
2148
2149 /* Like ADDR64, but use local entry point of function. */
2150 HOWTO (R_PPC64_ADDR64_LOCAL, /* type */
2151 0, /* rightshift */
2152 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
2153 64, /* bitsize */
2154 FALSE, /* pc_relative */
2155 0, /* bitpos */
2156 complain_overflow_dont, /* complain_on_overflow */
2157 bfd_elf_generic_reloc, /* special_function */
2158 "R_PPC64_ADDR64_LOCAL", /* name */
2159 FALSE, /* partial_inplace */
2160 0, /* src_mask */
2161 ONES (64), /* dst_mask */
2162 FALSE), /* pcrel_offset */
2163
2164 /* GNU extension to record C++ vtable hierarchy. */
2165 HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
2166 0, /* rightshift */
2167 0, /* size (0 = byte, 1 = short, 2 = long) */
2168 0, /* bitsize */
2169 FALSE, /* pc_relative */
2170 0, /* bitpos */
2171 complain_overflow_dont, /* complain_on_overflow */
2172 NULL, /* special_function */
2173 "R_PPC64_GNU_VTINHERIT", /* name */
2174 FALSE, /* partial_inplace */
2175 0, /* src_mask */
2176 0, /* dst_mask */
2177 FALSE), /* pcrel_offset */
2178
2179 /* GNU extension to record C++ vtable member usage. */
2180 HOWTO (R_PPC64_GNU_VTENTRY, /* type */
2181 0, /* rightshift */
2182 0, /* size (0 = byte, 1 = short, 2 = long) */
2183 0, /* bitsize */
2184 FALSE, /* pc_relative */
2185 0, /* bitpos */
2186 complain_overflow_dont, /* complain_on_overflow */
2187 NULL, /* special_function */
2188 "R_PPC64_GNU_VTENTRY", /* name */
2189 FALSE, /* partial_inplace */
2190 0, /* src_mask */
2191 0, /* dst_mask */
2192 FALSE), /* pcrel_offset */
2193 };
2194
2195 \f
2196 /* Initialize the ppc64_elf_howto_table, so that linear accesses can
2197 be done. */
2198
2199 static void
2200 ppc_howto_init (void)
2201 {
2202 unsigned int i, type;
2203
2204 for (i = 0; i < ARRAY_SIZE (ppc64_elf_howto_raw); i++)
2205 {
2206 type = ppc64_elf_howto_raw[i].type;
2207 BFD_ASSERT (type < ARRAY_SIZE (ppc64_elf_howto_table));
2208 ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
2209 }
2210 }
2211
2212 static reloc_howto_type *
2213 ppc64_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2214 bfd_reloc_code_real_type code)
2215 {
2216 enum elf_ppc64_reloc_type r = R_PPC64_NONE;
2217
2218 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2219 /* Initialize howto table if needed. */
2220 ppc_howto_init ();
2221
2222 switch (code)
2223 {
2224 default:
2225 return NULL;
2226
2227 case BFD_RELOC_NONE: r = R_PPC64_NONE;
2228 break;
2229 case BFD_RELOC_32: r = R_PPC64_ADDR32;
2230 break;
2231 case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24;
2232 break;
2233 case BFD_RELOC_16: r = R_PPC64_ADDR16;
2234 break;
2235 case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO;
2236 break;
2237 case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI;
2238 break;
2239 case BFD_RELOC_PPC64_ADDR16_HIGH: r = R_PPC64_ADDR16_HIGH;
2240 break;
2241 case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA;
2242 break;
2243 case BFD_RELOC_PPC64_ADDR16_HIGHA: r = R_PPC64_ADDR16_HIGHA;
2244 break;
2245 case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14;
2246 break;
2247 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN;
2248 break;
2249 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN;
2250 break;
2251 case BFD_RELOC_PPC_B26: r = R_PPC64_REL24;
2252 break;
2253 case BFD_RELOC_PPC_B16: r = R_PPC64_REL14;
2254 break;
2255 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN;
2256 break;
2257 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN;
2258 break;
2259 case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16;
2260 break;
2261 case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO;
2262 break;
2263 case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI;
2264 break;
2265 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA;
2266 break;
2267 case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY;
2268 break;
2269 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT;
2270 break;
2271 case BFD_RELOC_32_PCREL: r = R_PPC64_REL32;
2272 break;
2273 case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32;
2274 break;
2275 case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32;
2276 break;
2277 case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO;
2278 break;
2279 case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI;
2280 break;
2281 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA;
2282 break;
2283 case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF;
2284 break;
2285 case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO;
2286 break;
2287 case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI;
2288 break;
2289 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA;
2290 break;
2291 case BFD_RELOC_CTOR: r = R_PPC64_ADDR64;
2292 break;
2293 case BFD_RELOC_64: r = R_PPC64_ADDR64;
2294 break;
2295 case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER;
2296 break;
2297 case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA;
2298 break;
2299 case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST;
2300 break;
2301 case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA;
2302 break;
2303 case BFD_RELOC_64_PCREL: r = R_PPC64_REL64;
2304 break;
2305 case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64;
2306 break;
2307 case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64;
2308 break;
2309 case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16;
2310 break;
2311 case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO;
2312 break;
2313 case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI;
2314 break;
2315 case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA;
2316 break;
2317 case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC;
2318 break;
2319 case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16;
2320 break;
2321 case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO;
2322 break;
2323 case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI;
2324 break;
2325 case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA;
2326 break;
2327 case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS;
2328 break;
2329 case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS;
2330 break;
2331 case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS;
2332 break;
2333 case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS;
2334 break;
2335 case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS;
2336 break;
2337 case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS;
2338 break;
2339 case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS;
2340 break;
2341 case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS;
2342 break;
2343 case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS;
2344 break;
2345 case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS;
2346 break;
2347 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS;
2348 break;
2349 case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS;
2350 break;
2351 case BFD_RELOC_PPC_TLSGD: r = R_PPC64_TLSGD;
2352 break;
2353 case BFD_RELOC_PPC_TLSLD: r = R_PPC64_TLSLD;
2354 break;
2355 case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64;
2356 break;
2357 case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16;
2358 break;
2359 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO;
2360 break;
2361 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI;
2362 break;
2363 case BFD_RELOC_PPC64_TPREL16_HIGH: r = R_PPC64_TPREL16_HIGH;
2364 break;
2365 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA;
2366 break;
2367 case BFD_RELOC_PPC64_TPREL16_HIGHA: r = R_PPC64_TPREL16_HIGHA;
2368 break;
2369 case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64;
2370 break;
2371 case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16;
2372 break;
2373 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO;
2374 break;
2375 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI;
2376 break;
2377 case BFD_RELOC_PPC64_DTPREL16_HIGH: r = R_PPC64_DTPREL16_HIGH;
2378 break;
2379 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA;
2380 break;
2381 case BFD_RELOC_PPC64_DTPREL16_HIGHA: r = R_PPC64_DTPREL16_HIGHA;
2382 break;
2383 case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64;
2384 break;
2385 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16;
2386 break;
2387 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO;
2388 break;
2389 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI;
2390 break;
2391 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA;
2392 break;
2393 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16;
2394 break;
2395 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO;
2396 break;
2397 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI;
2398 break;
2399 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA;
2400 break;
2401 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS;
2402 break;
2403 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS;
2404 break;
2405 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI;
2406 break;
2407 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA;
2408 break;
2409 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS;
2410 break;
2411 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS;
2412 break;
2413 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI;
2414 break;
2415 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA;
2416 break;
2417 case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS;
2418 break;
2419 case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS;
2420 break;
2421 case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER;
2422 break;
2423 case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA;
2424 break;
2425 case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST;
2426 break;
2427 case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA;
2428 break;
2429 case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS;
2430 break;
2431 case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS;
2432 break;
2433 case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER;
2434 break;
2435 case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA;
2436 break;
2437 case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST;
2438 break;
2439 case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA;
2440 break;
2441 case BFD_RELOC_16_PCREL: r = R_PPC64_REL16;
2442 break;
2443 case BFD_RELOC_LO16_PCREL: r = R_PPC64_REL16_LO;
2444 break;
2445 case BFD_RELOC_HI16_PCREL: r = R_PPC64_REL16_HI;
2446 break;
2447 case BFD_RELOC_HI16_S_PCREL: r = R_PPC64_REL16_HA;
2448 break;
2449 case BFD_RELOC_PPC_REL16DX_HA: r = R_PPC64_REL16DX_HA;
2450 break;
2451 case BFD_RELOC_PPC64_ENTRY: r = R_PPC64_ENTRY;
2452 break;
2453 case BFD_RELOC_PPC64_ADDR64_LOCAL: r = R_PPC64_ADDR64_LOCAL;
2454 break;
2455 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT;
2456 break;
2457 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY;
2458 break;
2459 }
2460
2461 return ppc64_elf_howto_table[r];
2462 };
2463
2464 static reloc_howto_type *
2465 ppc64_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2466 const char *r_name)
2467 {
2468 unsigned int i;
2469
2470 for (i = 0; i < ARRAY_SIZE (ppc64_elf_howto_raw); i++)
2471 if (ppc64_elf_howto_raw[i].name != NULL
2472 && strcasecmp (ppc64_elf_howto_raw[i].name, r_name) == 0)
2473 return &ppc64_elf_howto_raw[i];
2474
2475 return NULL;
2476 }
2477
2478 /* Set the howto pointer for a PowerPC ELF reloc. */
2479
2480 static void
2481 ppc64_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
2482 Elf_Internal_Rela *dst)
2483 {
2484 unsigned int type;
2485
2486 /* Initialize howto table if needed. */
2487 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2488 ppc_howto_init ();
2489
2490 type = ELF64_R_TYPE (dst->r_info);
2491 if (type >= ARRAY_SIZE (ppc64_elf_howto_table))
2492 {
2493 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
2494 abfd, (int) type);
2495 type = R_PPC64_NONE;
2496 }
2497 cache_ptr->howto = ppc64_elf_howto_table[type];
2498 }
2499
2500 /* Handle the R_PPC64_ADDR16_HA and similar relocs. */
2501
2502 static bfd_reloc_status_type
2503 ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2504 void *data, asection *input_section,
2505 bfd *output_bfd, char **error_message)
2506 {
2507 enum elf_ppc64_reloc_type r_type;
2508 long insn;
2509 bfd_size_type octets;
2510 bfd_vma value;
2511
2512 /* If this is a relocatable link (output_bfd test tells us), just
2513 call the generic function. Any adjustment will be done at final
2514 link time. */
2515 if (output_bfd != NULL)
2516 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2517 input_section, output_bfd, error_message);
2518
2519 /* Adjust the addend for sign extension of the low 16 bits.
2520 We won't actually be using the low 16 bits, so trashing them
2521 doesn't matter. */
2522 reloc_entry->addend += 0x8000;
2523 r_type = reloc_entry->howto->type;
2524 if (r_type != R_PPC64_REL16DX_HA)
2525 return bfd_reloc_continue;
2526
2527 value = 0;
2528 if (!bfd_is_com_section (symbol->section))
2529 value = symbol->value;
2530 value += (reloc_entry->addend
2531 + symbol->section->output_offset
2532 + symbol->section->output_section->vma);
2533 value -= (reloc_entry->address
2534 + input_section->output_offset
2535 + input_section->output_section->vma);
2536 value = (bfd_signed_vma) value >> 16;
2537
2538 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2539 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2540 insn &= ~0x1fffc1;
2541 insn |= (value & 0xffc1) | ((value & 0x3e) << 15);
2542 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2543 if (value + 0x8000 > 0xffff)
2544 return bfd_reloc_overflow;
2545 return bfd_reloc_ok;
2546 }
2547
2548 static bfd_reloc_status_type
2549 ppc64_elf_branch_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2550 void *data, asection *input_section,
2551 bfd *output_bfd, char **error_message)
2552 {
2553 if (output_bfd != NULL)
2554 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2555 input_section, output_bfd, error_message);
2556
2557 if (strcmp (symbol->section->name, ".opd") == 0
2558 && (symbol->section->owner->flags & DYNAMIC) == 0)
2559 {
2560 bfd_vma dest = opd_entry_value (symbol->section,
2561 symbol->value + reloc_entry->addend,
2562 NULL, NULL, FALSE);
2563 if (dest != (bfd_vma) -1)
2564 reloc_entry->addend = dest - (symbol->value
2565 + symbol->section->output_section->vma
2566 + symbol->section->output_offset);
2567 }
2568 else
2569 {
2570 elf_symbol_type *elfsym = (elf_symbol_type *) symbol;
2571
2572 if (symbol->section->owner != abfd
2573 && symbol->section->owner != NULL
2574 && abiversion (symbol->section->owner) >= 2)
2575 {
2576 unsigned int i;
2577
2578 for (i = 0; i < symbol->section->owner->symcount; ++i)
2579 {
2580 asymbol *symdef = symbol->section->owner->outsymbols[i];
2581
2582 if (strcmp (symdef->name, symbol->name) == 0)
2583 {
2584 elfsym = (elf_symbol_type *) symdef;
2585 break;
2586 }
2587 }
2588 }
2589 reloc_entry->addend
2590 += PPC64_LOCAL_ENTRY_OFFSET (elfsym->internal_elf_sym.st_other);
2591 }
2592 return bfd_reloc_continue;
2593 }
2594
2595 static bfd_reloc_status_type
2596 ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2597 void *data, asection *input_section,
2598 bfd *output_bfd, char **error_message)
2599 {
2600 long insn;
2601 enum elf_ppc64_reloc_type r_type;
2602 bfd_size_type octets;
2603 /* Assume 'at' branch hints. */
2604 bfd_boolean is_isa_v2 = TRUE;
2605
2606 /* If this is a relocatable link (output_bfd test tells us), just
2607 call the generic function. Any adjustment will be done at final
2608 link time. */
2609 if (output_bfd != NULL)
2610 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2611 input_section, output_bfd, error_message);
2612
2613 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2614 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2615 insn &= ~(0x01 << 21);
2616 r_type = reloc_entry->howto->type;
2617 if (r_type == R_PPC64_ADDR14_BRTAKEN
2618 || r_type == R_PPC64_REL14_BRTAKEN)
2619 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
2620
2621 if (is_isa_v2)
2622 {
2623 /* Set 'a' bit. This is 0b00010 in BO field for branch
2624 on CR(BI) insns (BO == 001at or 011at), and 0b01000
2625 for branch on CTR insns (BO == 1a00t or 1a01t). */
2626 if ((insn & (0x14 << 21)) == (0x04 << 21))
2627 insn |= 0x02 << 21;
2628 else if ((insn & (0x14 << 21)) == (0x10 << 21))
2629 insn |= 0x08 << 21;
2630 else
2631 goto out;
2632 }
2633 else
2634 {
2635 bfd_vma target = 0;
2636 bfd_vma from;
2637
2638 if (!bfd_is_com_section (symbol->section))
2639 target = symbol->value;
2640 target += symbol->section->output_section->vma;
2641 target += symbol->section->output_offset;
2642 target += reloc_entry->addend;
2643
2644 from = (reloc_entry->address
2645 + input_section->output_offset
2646 + input_section->output_section->vma);
2647
2648 /* Invert 'y' bit if not the default. */
2649 if ((bfd_signed_vma) (target - from) < 0)
2650 insn ^= 0x01 << 21;
2651 }
2652 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2653 out:
2654 return ppc64_elf_branch_reloc (abfd, reloc_entry, symbol, data,
2655 input_section, output_bfd, error_message);
2656 }
2657
2658 static bfd_reloc_status_type
2659 ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2660 void *data, asection *input_section,
2661 bfd *output_bfd, char **error_message)
2662 {
2663 /* If this is a relocatable link (output_bfd test tells us), just
2664 call the generic function. Any adjustment will be done at final
2665 link time. */
2666 if (output_bfd != NULL)
2667 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2668 input_section, output_bfd, error_message);
2669
2670 /* Subtract the symbol section base address. */
2671 reloc_entry->addend -= symbol->section->output_section->vma;
2672 return bfd_reloc_continue;
2673 }
2674
2675 static bfd_reloc_status_type
2676 ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2677 void *data, asection *input_section,
2678 bfd *output_bfd, char **error_message)
2679 {
2680 /* If this is a relocatable link (output_bfd test tells us), just
2681 call the generic function. Any adjustment will be done at final
2682 link time. */
2683 if (output_bfd != NULL)
2684 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2685 input_section, output_bfd, error_message);
2686
2687 /* Subtract the symbol section base address. */
2688 reloc_entry->addend -= symbol->section->output_section->vma;
2689
2690 /* Adjust the addend for sign extension of the low 16 bits. */
2691 reloc_entry->addend += 0x8000;
2692 return bfd_reloc_continue;
2693 }
2694
2695 static bfd_reloc_status_type
2696 ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2697 void *data, asection *input_section,
2698 bfd *output_bfd, char **error_message)
2699 {
2700 bfd_vma TOCstart;
2701
2702 /* If this is a relocatable link (output_bfd test tells us), just
2703 call the generic function. Any adjustment will be done at final
2704 link time. */
2705 if (output_bfd != NULL)
2706 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2707 input_section, output_bfd, error_message);
2708
2709 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2710 if (TOCstart == 0)
2711 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2712
2713 /* Subtract the TOC base address. */
2714 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2715 return bfd_reloc_continue;
2716 }
2717
2718 static bfd_reloc_status_type
2719 ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2720 void *data, asection *input_section,
2721 bfd *output_bfd, char **error_message)
2722 {
2723 bfd_vma TOCstart;
2724
2725 /* If this is a relocatable link (output_bfd test tells us), just
2726 call the generic function. Any adjustment will be done at final
2727 link time. */
2728 if (output_bfd != NULL)
2729 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2730 input_section, output_bfd, error_message);
2731
2732 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2733 if (TOCstart == 0)
2734 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2735
2736 /* Subtract the TOC base address. */
2737 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2738
2739 /* Adjust the addend for sign extension of the low 16 bits. */
2740 reloc_entry->addend += 0x8000;
2741 return bfd_reloc_continue;
2742 }
2743
2744 static bfd_reloc_status_type
2745 ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2746 void *data, asection *input_section,
2747 bfd *output_bfd, char **error_message)
2748 {
2749 bfd_vma TOCstart;
2750 bfd_size_type octets;
2751
2752 /* If this is a relocatable link (output_bfd test tells us), just
2753 call the generic function. Any adjustment will be done at final
2754 link time. */
2755 if (output_bfd != NULL)
2756 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2757 input_section, output_bfd, error_message);
2758
2759 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2760 if (TOCstart == 0)
2761 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2762
2763 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2764 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
2765 return bfd_reloc_ok;
2766 }
2767
2768 static bfd_reloc_status_type
2769 ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2770 void *data, asection *input_section,
2771 bfd *output_bfd, char **error_message)
2772 {
2773 /* If this is a relocatable link (output_bfd test tells us), just
2774 call the generic function. Any adjustment will be done at final
2775 link time. */
2776 if (output_bfd != NULL)
2777 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2778 input_section, output_bfd, error_message);
2779
2780 if (error_message != NULL)
2781 {
2782 static char buf[60];
2783 sprintf (buf, "generic linker can't handle %s",
2784 reloc_entry->howto->name);
2785 *error_message = buf;
2786 }
2787 return bfd_reloc_dangerous;
2788 }
2789
2790 /* Track GOT entries needed for a given symbol. We might need more
2791 than one got entry per symbol. */
2792 struct got_entry
2793 {
2794 struct got_entry *next;
2795
2796 /* The symbol addend that we'll be placing in the GOT. */
2797 bfd_vma addend;
2798
2799 /* Unlike other ELF targets, we use separate GOT entries for the same
2800 symbol referenced from different input files. This is to support
2801 automatic multiple TOC/GOT sections, where the TOC base can vary
2802 from one input file to another. After partitioning into TOC groups
2803 we merge entries within the group.
2804
2805 Point to the BFD owning this GOT entry. */
2806 bfd *owner;
2807
2808 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
2809 TLS_TPREL or TLS_DTPREL for tls entries. */
2810 unsigned char tls_type;
2811
2812 /* Non-zero if got.ent points to real entry. */
2813 unsigned char is_indirect;
2814
2815 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
2816 union
2817 {
2818 bfd_signed_vma refcount;
2819 bfd_vma offset;
2820 struct got_entry *ent;
2821 } got;
2822 };
2823
2824 /* The same for PLT. */
2825 struct plt_entry
2826 {
2827 struct plt_entry *next;
2828
2829 bfd_vma addend;
2830
2831 union
2832 {
2833 bfd_signed_vma refcount;
2834 bfd_vma offset;
2835 } plt;
2836 };
2837
2838 struct ppc64_elf_obj_tdata
2839 {
2840 struct elf_obj_tdata elf;
2841
2842 /* Shortcuts to dynamic linker sections. */
2843 asection *got;
2844 asection *relgot;
2845
2846 /* Used during garbage collection. We attach global symbols defined
2847 on removed .opd entries to this section so that the sym is removed. */
2848 asection *deleted_section;
2849
2850 /* TLS local dynamic got entry handling. Support for multiple GOT
2851 sections means we potentially need one of these for each input bfd. */
2852 struct got_entry tlsld_got;
2853
2854 union {
2855 /* A copy of relocs before they are modified for --emit-relocs. */
2856 Elf_Internal_Rela *relocs;
2857
2858 /* Section contents. */
2859 bfd_byte *contents;
2860 } opd;
2861
2862 /* Nonzero if this bfd has small toc/got relocs, ie. that expect
2863 the reloc to be in the range -32768 to 32767. */
2864 unsigned int has_small_toc_reloc : 1;
2865
2866 /* Set if toc/got ha relocs detected not using r2, or lo reloc
2867 instruction not one we handle. */
2868 unsigned int unexpected_toc_insn : 1;
2869 };
2870
2871 #define ppc64_elf_tdata(bfd) \
2872 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
2873
2874 #define ppc64_tlsld_got(bfd) \
2875 (&ppc64_elf_tdata (bfd)->tlsld_got)
2876
2877 #define is_ppc64_elf(bfd) \
2878 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2879 && elf_object_id (bfd) == PPC64_ELF_DATA)
2880
2881 /* Override the generic function because we store some extras. */
2882
2883 static bfd_boolean
2884 ppc64_elf_mkobject (bfd *abfd)
2885 {
2886 return bfd_elf_allocate_object (abfd, sizeof (struct ppc64_elf_obj_tdata),
2887 PPC64_ELF_DATA);
2888 }
2889
2890 /* Fix bad default arch selected for a 64 bit input bfd when the
2891 default is 32 bit. Also select arch based on apuinfo. */
2892
2893 static bfd_boolean
2894 ppc64_elf_object_p (bfd *abfd)
2895 {
2896 if (!abfd->arch_info->the_default)
2897 return TRUE;
2898
2899 if (abfd->arch_info->bits_per_word == 32)
2900 {
2901 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2902
2903 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2904 {
2905 /* Relies on arch after 32 bit default being 64 bit default. */
2906 abfd->arch_info = abfd->arch_info->next;
2907 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2908 }
2909 }
2910 return _bfd_elf_ppc_set_arch (abfd);
2911 }
2912
2913 /* Support for core dump NOTE sections. */
2914
2915 static bfd_boolean
2916 ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2917 {
2918 size_t offset, size;
2919
2920 if (note->descsz != 504)
2921 return FALSE;
2922
2923 /* pr_cursig */
2924 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
2925
2926 /* pr_pid */
2927 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 32);
2928
2929 /* pr_reg */
2930 offset = 112;
2931 size = 384;
2932
2933 /* Make a ".reg/999" section. */
2934 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2935 size, note->descpos + offset);
2936 }
2937
2938 static bfd_boolean
2939 ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2940 {
2941 if (note->descsz != 136)
2942 return FALSE;
2943
2944 elf_tdata (abfd)->core->pid
2945 = bfd_get_32 (abfd, note->descdata + 24);
2946 elf_tdata (abfd)->core->program
2947 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
2948 elf_tdata (abfd)->core->command
2949 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
2950
2951 return TRUE;
2952 }
2953
2954 static char *
2955 ppc64_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type,
2956 ...)
2957 {
2958 switch (note_type)
2959 {
2960 default:
2961 return NULL;
2962
2963 case NT_PRPSINFO:
2964 {
2965 char data[136];
2966 va_list ap;
2967
2968 va_start (ap, note_type);
2969 memset (data, 0, sizeof (data));
2970 strncpy (data + 40, va_arg (ap, const char *), 16);
2971 strncpy (data + 56, va_arg (ap, const char *), 80);
2972 va_end (ap);
2973 return elfcore_write_note (abfd, buf, bufsiz,
2974 "CORE", note_type, data, sizeof (data));
2975 }
2976
2977 case NT_PRSTATUS:
2978 {
2979 char data[504];
2980 va_list ap;
2981 long pid;
2982 int cursig;
2983 const void *greg;
2984
2985 va_start (ap, note_type);
2986 memset (data, 0, 112);
2987 pid = va_arg (ap, long);
2988 bfd_put_32 (abfd, pid, data + 32);
2989 cursig = va_arg (ap, int);
2990 bfd_put_16 (abfd, cursig, data + 12);
2991 greg = va_arg (ap, const void *);
2992 memcpy (data + 112, greg, 384);
2993 memset (data + 496, 0, 8);
2994 va_end (ap);
2995 return elfcore_write_note (abfd, buf, bufsiz,
2996 "CORE", note_type, data, sizeof (data));
2997 }
2998 }
2999 }
3000
3001 /* Add extra PPC sections. */
3002
3003 static const struct bfd_elf_special_section ppc64_elf_special_sections[]=
3004 {
3005 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, 0 },
3006 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
3007 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
3008 { STRING_COMMA_LEN (".toc"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
3009 { STRING_COMMA_LEN (".toc1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
3010 { STRING_COMMA_LEN (".tocbss"), 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
3011 { NULL, 0, 0, 0, 0 }
3012 };
3013
3014 enum _ppc64_sec_type {
3015 sec_normal = 0,
3016 sec_opd = 1,
3017 sec_toc = 2
3018 };
3019
3020 struct _ppc64_elf_section_data
3021 {
3022 struct bfd_elf_section_data elf;
3023
3024 union
3025 {
3026 /* An array with one entry for each opd function descriptor,
3027 and some spares since opd entries may be either 16 or 24 bytes. */
3028 #define OPD_NDX(OFF) ((OFF) >> 4)
3029 struct _opd_sec_data
3030 {
3031 /* Points to the function code section for local opd entries. */
3032 asection **func_sec;
3033
3034 /* After editing .opd, adjust references to opd local syms. */
3035 long *adjust;
3036 } opd;
3037
3038 /* An array for toc sections, indexed by offset/8. */
3039 struct _toc_sec_data
3040 {
3041 /* Specifies the relocation symbol index used at a given toc offset. */
3042 unsigned *symndx;
3043
3044 /* And the relocation addend. */
3045 bfd_vma *add;
3046 } toc;
3047 } u;
3048
3049 enum _ppc64_sec_type sec_type:2;
3050
3051 /* Flag set when small branches are detected. Used to
3052 select suitable defaults for the stub group size. */
3053 unsigned int has_14bit_branch:1;
3054 };
3055
3056 #define ppc64_elf_section_data(sec) \
3057 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
3058
3059 static bfd_boolean
3060 ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
3061 {
3062 if (!sec->used_by_bfd)
3063 {
3064 struct _ppc64_elf_section_data *sdata;
3065 bfd_size_type amt = sizeof (*sdata);
3066
3067 sdata = bfd_zalloc (abfd, amt);
3068 if (sdata == NULL)
3069 return FALSE;
3070 sec->used_by_bfd = sdata;
3071 }
3072
3073 return _bfd_elf_new_section_hook (abfd, sec);
3074 }
3075
3076 static struct _opd_sec_data *
3077 get_opd_info (asection * sec)
3078 {
3079 if (sec != NULL
3080 && ppc64_elf_section_data (sec) != NULL
3081 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
3082 return &ppc64_elf_section_data (sec)->u.opd;
3083 return NULL;
3084 }
3085 \f
3086 /* Parameters for the qsort hook. */
3087 static bfd_boolean synthetic_relocatable;
3088
3089 /* qsort comparison function for ppc64_elf_get_synthetic_symtab. */
3090
3091 static int
3092 compare_symbols (const void *ap, const void *bp)
3093 {
3094 const asymbol *a = * (const asymbol **) ap;
3095 const asymbol *b = * (const asymbol **) bp;
3096
3097 /* Section symbols first. */
3098 if ((a->flags & BSF_SECTION_SYM) && !(b->flags & BSF_SECTION_SYM))
3099 return -1;
3100 if (!(a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM))
3101 return 1;
3102
3103 /* then .opd symbols. */
3104 if (strcmp (a->section->name, ".opd") == 0
3105 && strcmp (b->section->name, ".opd") != 0)
3106 return -1;
3107 if (strcmp (a->section->name, ".opd") != 0
3108 && strcmp (b->section->name, ".opd") == 0)
3109 return 1;
3110
3111 /* then other code symbols. */
3112 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3113 == (SEC_CODE | SEC_ALLOC)
3114 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3115 != (SEC_CODE | SEC_ALLOC))
3116 return -1;
3117
3118 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3119 != (SEC_CODE | SEC_ALLOC)
3120 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3121 == (SEC_CODE | SEC_ALLOC))
3122 return 1;
3123
3124 if (synthetic_relocatable)
3125 {
3126 if (a->section->id < b->section->id)
3127 return -1;
3128
3129 if (a->section->id > b->section->id)
3130 return 1;
3131 }
3132
3133 if (a->value + a->section->vma < b->value + b->section->vma)
3134 return -1;
3135
3136 if (a->value + a->section->vma > b->value + b->section->vma)
3137 return 1;
3138
3139 /* For syms with the same value, prefer strong dynamic global function
3140 syms over other syms. */
3141 if ((a->flags & BSF_GLOBAL) != 0 && (b->flags & BSF_GLOBAL) == 0)
3142 return -1;
3143
3144 if ((a->flags & BSF_GLOBAL) == 0 && (b->flags & BSF_GLOBAL) != 0)
3145 return 1;
3146
3147 if ((a->flags & BSF_FUNCTION) != 0 && (b->flags & BSF_FUNCTION) == 0)
3148 return -1;
3149
3150 if ((a->flags & BSF_FUNCTION) == 0 && (b->flags & BSF_FUNCTION) != 0)
3151 return 1;
3152
3153 if ((a->flags & BSF_WEAK) == 0 && (b->flags & BSF_WEAK) != 0)
3154 return -1;
3155
3156 if ((a->flags & BSF_WEAK) != 0 && (b->flags & BSF_WEAK) == 0)
3157 return 1;
3158
3159 if ((a->flags & BSF_DYNAMIC) != 0 && (b->flags & BSF_DYNAMIC) == 0)
3160 return -1;
3161
3162 if ((a->flags & BSF_DYNAMIC) == 0 && (b->flags & BSF_DYNAMIC) != 0)
3163 return 1;
3164
3165 return 0;
3166 }
3167
3168 /* Search SYMS for a symbol of the given VALUE. */
3169
3170 static asymbol *
3171 sym_exists_at (asymbol **syms, long lo, long hi, unsigned int id, bfd_vma value)
3172 {
3173 long mid;
3174
3175 if (id == (unsigned) -1)
3176 {
3177 while (lo < hi)
3178 {
3179 mid = (lo + hi) >> 1;
3180 if (syms[mid]->value + syms[mid]->section->vma < value)
3181 lo = mid + 1;
3182 else if (syms[mid]->value + syms[mid]->section->vma > value)
3183 hi = mid;
3184 else
3185 return syms[mid];
3186 }
3187 }
3188 else
3189 {
3190 while (lo < hi)
3191 {
3192 mid = (lo + hi) >> 1;
3193 if (syms[mid]->section->id < id)
3194 lo = mid + 1;
3195 else if (syms[mid]->section->id > id)
3196 hi = mid;
3197 else if (syms[mid]->value < value)
3198 lo = mid + 1;
3199 else if (syms[mid]->value > value)
3200 hi = mid;
3201 else
3202 return syms[mid];
3203 }
3204 }
3205 return NULL;
3206 }
3207
3208 static bfd_boolean
3209 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
3210 {
3211 bfd_vma vma = *(bfd_vma *) ptr;
3212 return ((section->flags & SEC_ALLOC) != 0
3213 && section->vma <= vma
3214 && vma < section->vma + section->size);
3215 }
3216
3217 /* Create synthetic symbols, effectively restoring "dot-symbol" function
3218 entry syms. Also generate @plt symbols for the glink branch table.
3219 Returns count of synthetic symbols in RET or -1 on error. */
3220
3221 static long
3222 ppc64_elf_get_synthetic_symtab (bfd *abfd,
3223 long static_count, asymbol **static_syms,
3224 long dyn_count, asymbol **dyn_syms,
3225 asymbol **ret)
3226 {
3227 asymbol *s;
3228 long i;
3229 long count;
3230 char *names;
3231 long symcount, codesecsym, codesecsymend, secsymend, opdsymend;
3232 asection *opd = NULL;
3233 bfd_boolean relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0;
3234 asymbol **syms;
3235 int abi = abiversion (abfd);
3236
3237 *ret = NULL;
3238
3239 if (abi < 2)
3240 {
3241 opd = bfd_get_section_by_name (abfd, ".opd");
3242 if (opd == NULL && abi == 1)
3243 return 0;
3244 }
3245
3246 symcount = static_count;
3247 if (!relocatable)
3248 symcount += dyn_count;
3249 if (symcount == 0)
3250 return 0;
3251
3252 syms = bfd_malloc ((symcount + 1) * sizeof (*syms));
3253 if (syms == NULL)
3254 return -1;
3255
3256 if (!relocatable && static_count != 0 && dyn_count != 0)
3257 {
3258 /* Use both symbol tables. */
3259 memcpy (syms, static_syms, static_count * sizeof (*syms));
3260 memcpy (syms + static_count, dyn_syms, (dyn_count + 1) * sizeof (*syms));
3261 }
3262 else if (!relocatable && static_count == 0)
3263 memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms));
3264 else
3265 memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms));
3266
3267 synthetic_relocatable = relocatable;
3268 qsort (syms, symcount, sizeof (*syms), compare_symbols);
3269
3270 if (!relocatable && symcount > 1)
3271 {
3272 long j;
3273 /* Trim duplicate syms, since we may have merged the normal and
3274 dynamic symbols. Actually, we only care about syms that have
3275 different values, so trim any with the same value. */
3276 for (i = 1, j = 1; i < symcount; ++i)
3277 if (syms[i - 1]->value + syms[i - 1]->section->vma
3278 != syms[i]->value + syms[i]->section->vma)
3279 syms[j++] = syms[i];
3280 symcount = j;
3281 }
3282
3283 i = 0;
3284 if (strcmp (syms[i]->section->name, ".opd") == 0)
3285 ++i;
3286 codesecsym = i;
3287
3288 for (; i < symcount; ++i)
3289 if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3290 != (SEC_CODE | SEC_ALLOC))
3291 || (syms[i]->flags & BSF_SECTION_SYM) == 0)
3292 break;
3293 codesecsymend = i;
3294
3295 for (; i < symcount; ++i)
3296 if ((syms[i]->flags & BSF_SECTION_SYM) == 0)
3297 break;
3298 secsymend = i;
3299
3300 for (; i < symcount; ++i)
3301 if (strcmp (syms[i]->section->name, ".opd") != 0)
3302 break;
3303 opdsymend = i;
3304
3305 for (; i < symcount; ++i)
3306 if ((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3307 != (SEC_CODE | SEC_ALLOC))
3308 break;
3309 symcount = i;
3310
3311 count = 0;
3312
3313 if (relocatable)
3314 {
3315 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3316 arelent *r;
3317 size_t size;
3318 long relcount;
3319
3320 if (opdsymend == secsymend)
3321 goto done;
3322
3323 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3324 relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0;
3325 if (relcount == 0)
3326 goto done;
3327
3328 if (!(*slurp_relocs) (abfd, opd, static_syms, FALSE))
3329 {
3330 count = -1;
3331 goto done;
3332 }
3333
3334 size = 0;
3335 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3336 {
3337 asymbol *sym;
3338
3339 while (r < opd->relocation + relcount
3340 && r->address < syms[i]->value + opd->vma)
3341 ++r;
3342
3343 if (r == opd->relocation + relcount)
3344 break;
3345
3346 if (r->address != syms[i]->value + opd->vma)
3347 continue;
3348
3349 if (r->howto->type != R_PPC64_ADDR64)
3350 continue;
3351
3352 sym = *r->sym_ptr_ptr;
3353 if (!sym_exists_at (syms, opdsymend, symcount,
3354 sym->section->id, sym->value + r->addend))
3355 {
3356 ++count;
3357 size += sizeof (asymbol);
3358 size += strlen (syms[i]->name) + 2;
3359 }
3360 }
3361
3362 if (size == 0)
3363 goto done;
3364 s = *ret = bfd_malloc (size);
3365 if (s == NULL)
3366 {
3367 count = -1;
3368 goto done;
3369 }
3370
3371 names = (char *) (s + count);
3372
3373 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3374 {
3375 asymbol *sym;
3376
3377 while (r < opd->relocation + relcount
3378 && r->address < syms[i]->value + opd->vma)
3379 ++r;
3380
3381 if (r == opd->relocation + relcount)
3382 break;
3383
3384 if (r->address != syms[i]->value + opd->vma)
3385 continue;
3386
3387 if (r->howto->type != R_PPC64_ADDR64)
3388 continue;
3389
3390 sym = *r->sym_ptr_ptr;
3391 if (!sym_exists_at (syms, opdsymend, symcount,
3392 sym->section->id, sym->value + r->addend))
3393 {
3394 size_t len;
3395
3396 *s = *syms[i];
3397 s->flags |= BSF_SYNTHETIC;
3398 s->section = sym->section;
3399 s->value = sym->value + r->addend;
3400 s->name = names;
3401 *names++ = '.';
3402 len = strlen (syms[i]->name);
3403 memcpy (names, syms[i]->name, len + 1);
3404 names += len + 1;
3405 /* Have udata.p point back to the original symbol this
3406 synthetic symbol was derived from. */
3407 s->udata.p = syms[i];
3408 s++;
3409 }
3410 }
3411 }
3412 else
3413 {
3414 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3415 bfd_byte *contents = NULL;
3416 size_t size;
3417 long plt_count = 0;
3418 bfd_vma glink_vma = 0, resolv_vma = 0;
3419 asection *dynamic, *glink = NULL, *relplt = NULL;
3420 arelent *p;
3421
3422 if (opd != NULL && !bfd_malloc_and_get_section (abfd, opd, &contents))
3423 {
3424 free_contents_and_exit_err:
3425 count = -1;
3426 free_contents_and_exit:
3427 if (contents)
3428 free (contents);
3429 goto done;
3430 }
3431
3432 size = 0;
3433 for (i = secsymend; i < opdsymend; ++i)
3434 {
3435 bfd_vma ent;
3436
3437 /* Ignore bogus symbols. */
3438 if (syms[i]->value > opd->size - 8)
3439 continue;
3440
3441 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3442 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3443 {
3444 ++count;
3445 size += sizeof (asymbol);
3446 size += strlen (syms[i]->name) + 2;
3447 }
3448 }
3449
3450 /* Get start of .glink stubs from DT_PPC64_GLINK. */
3451 if (dyn_count != 0
3452 && (dynamic = bfd_get_section_by_name (abfd, ".dynamic")) != NULL)
3453 {
3454 bfd_byte *dynbuf, *extdyn, *extdynend;
3455 size_t extdynsize;
3456 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
3457
3458 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
3459 goto free_contents_and_exit_err;
3460
3461 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
3462 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
3463
3464 extdyn = dynbuf;
3465 extdynend = extdyn + dynamic->size;
3466 for (; extdyn < extdynend; extdyn += extdynsize)
3467 {
3468 Elf_Internal_Dyn dyn;
3469 (*swap_dyn_in) (abfd, extdyn, &dyn);
3470
3471 if (dyn.d_tag == DT_NULL)
3472 break;
3473
3474 if (dyn.d_tag == DT_PPC64_GLINK)
3475 {
3476 /* The first glink stub starts at offset 32; see
3477 comment in ppc64_elf_finish_dynamic_sections. */
3478 glink_vma = dyn.d_un.d_val + GLINK_CALL_STUB_SIZE - 8 * 4;
3479 /* The .glink section usually does not survive the final
3480 link; search for the section (usually .text) where the
3481 glink stubs now reside. */
3482 glink = bfd_sections_find_if (abfd, section_covers_vma,
3483 &glink_vma);
3484 break;
3485 }
3486 }
3487
3488 free (dynbuf);
3489 }
3490
3491 if (glink != NULL)
3492 {
3493 /* Determine __glink trampoline by reading the relative branch
3494 from the first glink stub. */
3495 bfd_byte buf[4];
3496 unsigned int off = 0;
3497
3498 while (bfd_get_section_contents (abfd, glink, buf,
3499 glink_vma + off - glink->vma, 4))
3500 {
3501 unsigned int insn = bfd_get_32 (abfd, buf);
3502 insn ^= B_DOT;
3503 if ((insn & ~0x3fffffc) == 0)
3504 {
3505 resolv_vma = glink_vma + off + (insn ^ 0x2000000) - 0x2000000;
3506 break;
3507 }
3508 off += 4;
3509 if (off > 4)
3510 break;
3511 }
3512
3513 if (resolv_vma)
3514 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
3515
3516 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
3517 if (relplt != NULL)
3518 {
3519 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3520 if (! (*slurp_relocs) (abfd, relplt, dyn_syms, TRUE))
3521 goto free_contents_and_exit_err;
3522
3523 plt_count = relplt->size / sizeof (Elf64_External_Rela);
3524 size += plt_count * sizeof (asymbol);
3525
3526 p = relplt->relocation;
3527 for (i = 0; i < plt_count; i++, p++)
3528 {
3529 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
3530 if (p->addend != 0)
3531 size += sizeof ("+0x") - 1 + 16;
3532 }
3533 }
3534 }
3535
3536 if (size == 0)
3537 goto free_contents_and_exit;
3538 s = *ret = bfd_malloc (size);
3539 if (s == NULL)
3540 goto free_contents_and_exit_err;
3541
3542 names = (char *) (s + count + plt_count + (resolv_vma != 0));
3543
3544 for (i = secsymend; i < opdsymend; ++i)
3545 {
3546 bfd_vma ent;
3547
3548 if (syms[i]->value > opd->size - 8)
3549 continue;
3550
3551 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3552 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3553 {
3554 long lo, hi;
3555 size_t len;
3556 asection *sec = abfd->sections;
3557
3558 *s = *syms[i];
3559 lo = codesecsym;
3560 hi = codesecsymend;
3561 while (lo < hi)
3562 {
3563 long mid = (lo + hi) >> 1;
3564 if (syms[mid]->section->vma < ent)
3565 lo = mid + 1;
3566 else if (syms[mid]->section->vma > ent)
3567 hi = mid;
3568 else
3569 {
3570 sec = syms[mid]->section;
3571 break;
3572 }
3573 }
3574
3575 if (lo >= hi && lo > codesecsym)
3576 sec = syms[lo - 1]->section;
3577
3578 for (; sec != NULL; sec = sec->next)
3579 {
3580 if (sec->vma > ent)
3581 break;
3582 /* SEC_LOAD may not be set if SEC is from a separate debug
3583 info file. */
3584 if ((sec->flags & SEC_ALLOC) == 0)
3585 break;
3586 if ((sec->flags & SEC_CODE) != 0)
3587 s->section = sec;
3588 }
3589 s->flags |= BSF_SYNTHETIC;
3590 s->value = ent - s->section->vma;
3591 s->name = names;
3592 *names++ = '.';
3593 len = strlen (syms[i]->name);
3594 memcpy (names, syms[i]->name, len + 1);
3595 names += len + 1;
3596 /* Have udata.p point back to the original symbol this
3597 synthetic symbol was derived from. */
3598 s->udata.p = syms[i];
3599 s++;
3600 }
3601 }
3602 free (contents);
3603
3604 if (glink != NULL && relplt != NULL)
3605 {
3606 if (resolv_vma)
3607 {
3608 /* Add a symbol for the main glink trampoline. */
3609 memset (s, 0, sizeof *s);
3610 s->the_bfd = abfd;
3611 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3612 s->section = glink;
3613 s->value = resolv_vma - glink->vma;
3614 s->name = names;
3615 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3616 names += sizeof ("__glink_PLTresolve");
3617 s++;
3618 count++;
3619 }
3620
3621 /* FIXME: It would be very much nicer to put sym@plt on the
3622 stub rather than on the glink branch table entry. The
3623 objdump disassembler would then use a sensible symbol
3624 name on plt calls. The difficulty in doing so is
3625 a) finding the stubs, and,
3626 b) matching stubs against plt entries, and,
3627 c) there can be multiple stubs for a given plt entry.
3628
3629 Solving (a) could be done by code scanning, but older
3630 ppc64 binaries used different stubs to current code.
3631 (b) is the tricky one since you need to known the toc
3632 pointer for at least one function that uses a pic stub to
3633 be able to calculate the plt address referenced.
3634 (c) means gdb would need to set multiple breakpoints (or
3635 find the glink branch itself) when setting breakpoints
3636 for pending shared library loads. */
3637 p = relplt->relocation;
3638 for (i = 0; i < plt_count; i++, p++)
3639 {
3640 size_t len;
3641
3642 *s = **p->sym_ptr_ptr;
3643 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
3644 we are defining a symbol, ensure one of them is set. */
3645 if ((s->flags & BSF_LOCAL) == 0)
3646 s->flags |= BSF_GLOBAL;
3647 s->flags |= BSF_SYNTHETIC;
3648 s->section = glink;
3649 s->value = glink_vma - glink->vma;
3650 s->name = names;
3651 s->udata.p = NULL;
3652 len = strlen ((*p->sym_ptr_ptr)->name);
3653 memcpy (names, (*p->sym_ptr_ptr)->name, len);
3654 names += len;
3655 if (p->addend != 0)
3656 {
3657 memcpy (names, "+0x", sizeof ("+0x") - 1);
3658 names += sizeof ("+0x") - 1;
3659 bfd_sprintf_vma (abfd, names, p->addend);
3660 names += strlen (names);
3661 }
3662 memcpy (names, "@plt", sizeof ("@plt"));
3663 names += sizeof ("@plt");
3664 s++;
3665 if (abi < 2)
3666 {
3667 glink_vma += 8;
3668 if (i >= 0x8000)
3669 glink_vma += 4;
3670 }
3671 else
3672 glink_vma += 4;
3673 }
3674 count += plt_count;
3675 }
3676 }
3677
3678 done:
3679 free (syms);
3680 return count;
3681 }
3682 \f
3683 /* The following functions are specific to the ELF linker, while
3684 functions above are used generally. Those named ppc64_elf_* are
3685 called by the main ELF linker code. They appear in this file more
3686 or less in the order in which they are called. eg.
3687 ppc64_elf_check_relocs is called early in the link process,
3688 ppc64_elf_finish_dynamic_sections is one of the last functions
3689 called.
3690
3691 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
3692 functions have both a function code symbol and a function descriptor
3693 symbol. A call to foo in a relocatable object file looks like:
3694
3695 . .text
3696 . x:
3697 . bl .foo
3698 . nop
3699
3700 The function definition in another object file might be:
3701
3702 . .section .opd
3703 . foo: .quad .foo
3704 . .quad .TOC.@tocbase
3705 . .quad 0
3706 .
3707 . .text
3708 . .foo: blr
3709
3710 When the linker resolves the call during a static link, the branch
3711 unsurprisingly just goes to .foo and the .opd information is unused.
3712 If the function definition is in a shared library, things are a little
3713 different: The call goes via a plt call stub, the opd information gets
3714 copied to the plt, and the linker patches the nop.
3715
3716 . x:
3717 . bl .foo_stub
3718 . ld 2,40(1)
3719 .
3720 .
3721 . .foo_stub:
3722 . std 2,40(1) # in practice, the call stub
3723 . addis 11,2,Lfoo@toc@ha # is slightly optimized, but
3724 . addi 11,11,Lfoo@toc@l # this is the general idea
3725 . ld 12,0(11)
3726 . ld 2,8(11)
3727 . mtctr 12
3728 . ld 11,16(11)
3729 . bctr
3730 .
3731 . .section .plt
3732 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
3733
3734 The "reloc ()" notation is supposed to indicate that the linker emits
3735 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
3736 copying.
3737
3738 What are the difficulties here? Well, firstly, the relocations
3739 examined by the linker in check_relocs are against the function code
3740 sym .foo, while the dynamic relocation in the plt is emitted against
3741 the function descriptor symbol, foo. Somewhere along the line, we need
3742 to carefully copy dynamic link information from one symbol to the other.
3743 Secondly, the generic part of the elf linker will make .foo a dynamic
3744 symbol as is normal for most other backends. We need foo dynamic
3745 instead, at least for an application final link. However, when
3746 creating a shared library containing foo, we need to have both symbols
3747 dynamic so that references to .foo are satisfied during the early
3748 stages of linking. Otherwise the linker might decide to pull in a
3749 definition from some other object, eg. a static library.
3750
3751 Update: As of August 2004, we support a new convention. Function
3752 calls may use the function descriptor symbol, ie. "bl foo". This
3753 behaves exactly as "bl .foo". */
3754
3755 /* Of those relocs that might be copied as dynamic relocs, this function
3756 selects those that must be copied when linking a shared library,
3757 even when the symbol is local. */
3758
3759 static int
3760 must_be_dyn_reloc (struct bfd_link_info *info,
3761 enum elf_ppc64_reloc_type r_type)
3762 {
3763 switch (r_type)
3764 {
3765 default:
3766 return 1;
3767
3768 case R_PPC64_REL32:
3769 case R_PPC64_REL64:
3770 case R_PPC64_REL30:
3771 return 0;
3772
3773 case R_PPC64_TPREL16:
3774 case R_PPC64_TPREL16_LO:
3775 case R_PPC64_TPREL16_HI:
3776 case R_PPC64_TPREL16_HA:
3777 case R_PPC64_TPREL16_DS:
3778 case R_PPC64_TPREL16_LO_DS:
3779 case R_PPC64_TPREL16_HIGH:
3780 case R_PPC64_TPREL16_HIGHA:
3781 case R_PPC64_TPREL16_HIGHER:
3782 case R_PPC64_TPREL16_HIGHERA:
3783 case R_PPC64_TPREL16_HIGHEST:
3784 case R_PPC64_TPREL16_HIGHESTA:
3785 case R_PPC64_TPREL64:
3786 return !bfd_link_executable (info);
3787 }
3788 }
3789
3790 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3791 copying dynamic variables from a shared lib into an app's dynbss
3792 section, and instead use a dynamic relocation to point into the
3793 shared lib. With code that gcc generates, it's vital that this be
3794 enabled; In the PowerPC64 ABI, the address of a function is actually
3795 the address of a function descriptor, which resides in the .opd
3796 section. gcc uses the descriptor directly rather than going via the
3797 GOT as some other ABI's do, which means that initialized function
3798 pointers must reference the descriptor. Thus, a function pointer
3799 initialized to the address of a function in a shared library will
3800 either require a copy reloc, or a dynamic reloc. Using a copy reloc
3801 redefines the function descriptor symbol to point to the copy. This
3802 presents a problem as a plt entry for that function is also
3803 initialized from the function descriptor symbol and the copy reloc
3804 may not be initialized first. */
3805 #define ELIMINATE_COPY_RELOCS 1
3806
3807 /* Section name for stubs is the associated section name plus this
3808 string. */
3809 #define STUB_SUFFIX ".stub"
3810
3811 /* Linker stubs.
3812 ppc_stub_long_branch:
3813 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
3814 destination, but a 24 bit branch in a stub section will reach.
3815 . b dest
3816
3817 ppc_stub_plt_branch:
3818 Similar to the above, but a 24 bit branch in the stub section won't
3819 reach its destination.
3820 . addis %r11,%r2,xxx@toc@ha
3821 . ld %r12,xxx@toc@l(%r11)
3822 . mtctr %r12
3823 . bctr
3824
3825 ppc_stub_plt_call:
3826 Used to call a function in a shared library. If it so happens that
3827 the plt entry referenced crosses a 64k boundary, then an extra
3828 "addi %r11,%r11,xxx@toc@l" will be inserted before the "mtctr".
3829 . std %r2,40(%r1)
3830 . addis %r11,%r2,xxx@toc@ha
3831 . ld %r12,xxx+0@toc@l(%r11)
3832 . mtctr %r12
3833 . ld %r2,xxx+8@toc@l(%r11)
3834 . ld %r11,xxx+16@toc@l(%r11)
3835 . bctr
3836
3837 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
3838 code to adjust the value and save r2 to support multiple toc sections.
3839 A ppc_stub_long_branch with an r2 offset looks like:
3840 . std %r2,40(%r1)
3841 . addis %r2,%r2,off@ha
3842 . addi %r2,%r2,off@l
3843 . b dest
3844
3845 A ppc_stub_plt_branch with an r2 offset looks like:
3846 . std %r2,40(%r1)
3847 . addis %r11,%r2,xxx@toc@ha
3848 . ld %r12,xxx@toc@l(%r11)
3849 . addis %r2,%r2,off@ha
3850 . addi %r2,%r2,off@l
3851 . mtctr %r12
3852 . bctr
3853
3854 In cases where the "addis" instruction would add zero, the "addis" is
3855 omitted and following instructions modified slightly in some cases.
3856 */
3857
3858 enum ppc_stub_type {
3859 ppc_stub_none,
3860 ppc_stub_long_branch,
3861 ppc_stub_long_branch_r2off,
3862 ppc_stub_plt_branch,
3863 ppc_stub_plt_branch_r2off,
3864 ppc_stub_plt_call,
3865 ppc_stub_plt_call_r2save,
3866 ppc_stub_global_entry,
3867 ppc_stub_save_res
3868 };
3869
3870 /* Information on stub grouping. */
3871 struct map_stub
3872 {
3873 /* The stub section. */
3874 asection *stub_sec;
3875 /* This is the section to which stubs in the group will be attached. */
3876 asection *link_sec;
3877 /* Next group. */
3878 struct map_stub *next;
3879 /* Whether to emit a copy of register save/restore functions in this
3880 group. */
3881 int needs_save_res;
3882 };
3883
3884 struct ppc_stub_hash_entry {
3885
3886 /* Base hash table entry structure. */
3887 struct bfd_hash_entry root;
3888
3889 enum ppc_stub_type stub_type;
3890
3891 /* Group information. */
3892 struct map_stub *group;
3893
3894 /* Offset within stub_sec of the beginning of this stub. */
3895 bfd_vma stub_offset;
3896
3897 /* Given the symbol's value and its section we can determine its final
3898 value when building the stubs (so the stub knows where to jump. */
3899 bfd_vma target_value;
3900 asection *target_section;
3901
3902 /* The symbol table entry, if any, that this was derived from. */
3903 struct ppc_link_hash_entry *h;
3904 struct plt_entry *plt_ent;
3905
3906 /* Symbol st_other. */
3907 unsigned char other;
3908 };
3909
3910 struct ppc_branch_hash_entry {
3911
3912 /* Base hash table entry structure. */
3913 struct bfd_hash_entry root;
3914
3915 /* Offset within branch lookup table. */
3916 unsigned int offset;
3917
3918 /* Generation marker. */
3919 unsigned int iter;
3920 };
3921
3922 /* Used to track dynamic relocations for local symbols. */
3923 struct ppc_dyn_relocs
3924 {
3925 struct ppc_dyn_relocs *next;
3926
3927 /* The input section of the reloc. */
3928 asection *sec;
3929
3930 /* Total number of relocs copied for the input section. */
3931 unsigned int count : 31;
3932
3933 /* Whether this entry is for STT_GNU_IFUNC symbols. */
3934 unsigned int ifunc : 1;
3935 };
3936
3937 struct ppc_link_hash_entry
3938 {
3939 struct elf_link_hash_entry elf;
3940
3941 union {
3942 /* A pointer to the most recently used stub hash entry against this
3943 symbol. */
3944 struct ppc_stub_hash_entry *stub_cache;
3945
3946 /* A pointer to the next symbol starting with a '.' */
3947 struct ppc_link_hash_entry *next_dot_sym;
3948 } u;
3949
3950 /* Track dynamic relocs copied for this symbol. */
3951 struct elf_dyn_relocs *dyn_relocs;
3952
3953 /* Chain of aliases referring to a weakdef. */
3954 struct ppc_link_hash_entry *weakref;
3955
3956 /* Link between function code and descriptor symbols. */
3957 struct ppc_link_hash_entry *oh;
3958
3959 /* Flag function code and descriptor symbols. */
3960 unsigned int is_func:1;
3961 unsigned int is_func_descriptor:1;
3962 unsigned int fake:1;
3963
3964 /* Whether global opd/toc sym has been adjusted or not.
3965 After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
3966 should be set for all globals defined in any opd/toc section. */
3967 unsigned int adjust_done:1;
3968
3969 /* Set if we twiddled this symbol to weak at some stage. */
3970 unsigned int was_undefined:1;
3971
3972 /* Set if this is an out-of-line register save/restore function,
3973 with non-standard calling convention. */
3974 unsigned int save_res:1;
3975
3976 /* Contexts in which symbol is used in the GOT (or TOC).
3977 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
3978 corresponding relocs are encountered during check_relocs.
3979 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3980 indicate the corresponding GOT entry type is not needed.
3981 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
3982 a TPREL one. We use a separate flag rather than setting TPREL
3983 just for convenience in distinguishing the two cases. */
3984 #define TLS_GD 1 /* GD reloc. */
3985 #define TLS_LD 2 /* LD reloc. */
3986 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3987 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3988 #define TLS_TLS 16 /* Any TLS reloc. */
3989 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
3990 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
3991 #define PLT_IFUNC 128 /* STT_GNU_IFUNC. */
3992 unsigned char tls_mask;
3993 };
3994
3995 /* ppc64 ELF linker hash table. */
3996
3997 struct ppc_link_hash_table
3998 {
3999 struct elf_link_hash_table elf;
4000
4001 /* The stub hash table. */
4002 struct bfd_hash_table stub_hash_table;
4003
4004 /* Another hash table for plt_branch stubs. */
4005 struct bfd_hash_table branch_hash_table;
4006
4007 /* Hash table for function prologue tocsave. */
4008 htab_t tocsave_htab;
4009
4010 /* Various options and other info passed from the linker. */
4011 struct ppc64_elf_params *params;
4012
4013 /* The size of sec_info below. */
4014 unsigned int sec_info_arr_size;
4015
4016 /* Per-section array of extra section info. Done this way rather
4017 than as part of ppc64_elf_section_data so we have the info for
4018 non-ppc64 sections. */
4019 struct
4020 {
4021 /* Along with elf_gp, specifies the TOC pointer used by this section. */
4022 bfd_vma toc_off;
4023
4024 union
4025 {
4026 /* The section group that this section belongs to. */
4027 struct map_stub *group;
4028 /* A temp section list pointer. */
4029 asection *list;
4030 } u;
4031 } *sec_info;
4032
4033 /* Linked list of groups. */
4034 struct map_stub *group;
4035
4036 /* Temp used when calculating TOC pointers. */
4037 bfd_vma toc_curr;
4038 bfd *toc_bfd;
4039 asection *toc_first_sec;
4040
4041 /* Used when adding symbols. */
4042 struct ppc_link_hash_entry *dot_syms;
4043
4044 /* Shortcuts to get to dynamic linker sections. */
4045 asection *dynbss;
4046 asection *relbss;
4047 asection *glink;
4048 asection *sfpr;
4049 asection *brlt;
4050 asection *relbrlt;
4051 asection *glink_eh_frame;
4052
4053 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
4054 struct ppc_link_hash_entry *tls_get_addr;
4055 struct ppc_link_hash_entry *tls_get_addr_fd;
4056
4057 /* The size of reliplt used by got entry relocs. */
4058 bfd_size_type got_reli_size;
4059
4060 /* Statistics. */
4061 unsigned long stub_count[ppc_stub_global_entry];
4062
4063 /* Number of stubs against global syms. */
4064 unsigned long stub_globals;
4065
4066 /* Set if we're linking code with function descriptors. */
4067 unsigned int opd_abi:1;
4068
4069 /* Support for multiple toc sections. */
4070 unsigned int do_multi_toc:1;
4071 unsigned int multi_toc_needed:1;
4072 unsigned int second_toc_pass:1;
4073 unsigned int do_toc_opt:1;
4074
4075 /* Set on error. */
4076 unsigned int stub_error:1;
4077
4078 /* Temp used by ppc64_elf_before_check_relocs. */
4079 unsigned int twiddled_syms:1;
4080
4081 /* Incremented every time we size stubs. */
4082 unsigned int stub_iteration;
4083
4084 /* Small local sym cache. */
4085 struct sym_cache sym_cache;
4086 };
4087
4088 /* Rename some of the generic section flags to better document how they
4089 are used here. */
4090
4091 /* Nonzero if this section has TLS related relocations. */
4092 #define has_tls_reloc sec_flg0
4093
4094 /* Nonzero if this section has a call to __tls_get_addr. */
4095 #define has_tls_get_addr_call sec_flg1
4096
4097 /* Nonzero if this section has any toc or got relocs. */
4098 #define has_toc_reloc sec_flg2
4099
4100 /* Nonzero if this section has a call to another section that uses
4101 the toc or got. */
4102 #define makes_toc_func_call sec_flg3
4103
4104 /* Recursion protection when determining above flag. */
4105 #define call_check_in_progress sec_flg4
4106 #define call_check_done sec_flg5
4107
4108 /* Get the ppc64 ELF linker hash table from a link_info structure. */
4109
4110 #define ppc_hash_table(p) \
4111 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
4112 == PPC64_ELF_DATA ? ((struct ppc_link_hash_table *) ((p)->hash)) : NULL)
4113
4114 #define ppc_stub_hash_lookup(table, string, create, copy) \
4115 ((struct ppc_stub_hash_entry *) \
4116 bfd_hash_lookup ((table), (string), (create), (copy)))
4117
4118 #define ppc_branch_hash_lookup(table, string, create, copy) \
4119 ((struct ppc_branch_hash_entry *) \
4120 bfd_hash_lookup ((table), (string), (create), (copy)))
4121
4122 /* Create an entry in the stub hash table. */
4123
4124 static struct bfd_hash_entry *
4125 stub_hash_newfunc (struct bfd_hash_entry *entry,
4126 struct bfd_hash_table *table,
4127 const char *string)
4128 {
4129 /* Allocate the structure if it has not already been allocated by a
4130 subclass. */
4131 if (entry == NULL)
4132 {
4133 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
4134 if (entry == NULL)
4135 return entry;
4136 }
4137
4138 /* Call the allocation method of the superclass. */
4139 entry = bfd_hash_newfunc (entry, table, string);
4140 if (entry != NULL)
4141 {
4142 struct ppc_stub_hash_entry *eh;
4143
4144 /* Initialize the local fields. */
4145 eh = (struct ppc_stub_hash_entry *) entry;
4146 eh->stub_type = ppc_stub_none;
4147 eh->group = NULL;
4148 eh->stub_offset = 0;
4149 eh->target_value = 0;
4150 eh->target_section = NULL;
4151 eh->h = NULL;
4152 eh->plt_ent = NULL;
4153 eh->other = 0;
4154 }
4155
4156 return entry;
4157 }
4158
4159 /* Create an entry in the branch hash table. */
4160
4161 static struct bfd_hash_entry *
4162 branch_hash_newfunc (struct bfd_hash_entry *entry,
4163 struct bfd_hash_table *table,
4164 const char *string)
4165 {
4166 /* Allocate the structure if it has not already been allocated by a
4167 subclass. */
4168 if (entry == NULL)
4169 {
4170 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
4171 if (entry == NULL)
4172 return entry;
4173 }
4174
4175 /* Call the allocation method of the superclass. */
4176 entry = bfd_hash_newfunc (entry, table, string);
4177 if (entry != NULL)
4178 {
4179 struct ppc_branch_hash_entry *eh;
4180
4181 /* Initialize the local fields. */
4182 eh = (struct ppc_branch_hash_entry *) entry;
4183 eh->offset = 0;
4184 eh->iter = 0;
4185 }
4186
4187 return entry;
4188 }
4189
4190 /* Create an entry in a ppc64 ELF linker hash table. */
4191
4192 static struct bfd_hash_entry *
4193 link_hash_newfunc (struct bfd_hash_entry *entry,
4194 struct bfd_hash_table *table,
4195 const char *string)
4196 {
4197 /* Allocate the structure if it has not already been allocated by a
4198 subclass. */
4199 if (entry == NULL)
4200 {
4201 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
4202 if (entry == NULL)
4203 return entry;
4204 }
4205
4206 /* Call the allocation method of the superclass. */
4207 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
4208 if (entry != NULL)
4209 {
4210 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
4211
4212 memset (&eh->u.stub_cache, 0,
4213 (sizeof (struct ppc_link_hash_entry)
4214 - offsetof (struct ppc_link_hash_entry, u.stub_cache)));
4215
4216 /* When making function calls, old ABI code references function entry
4217 points (dot symbols), while new ABI code references the function
4218 descriptor symbol. We need to make any combination of reference and
4219 definition work together, without breaking archive linking.
4220
4221 For a defined function "foo" and an undefined call to "bar":
4222 An old object defines "foo" and ".foo", references ".bar" (possibly
4223 "bar" too).
4224 A new object defines "foo" and references "bar".
4225
4226 A new object thus has no problem with its undefined symbols being
4227 satisfied by definitions in an old object. On the other hand, the
4228 old object won't have ".bar" satisfied by a new object.
4229
4230 Keep a list of newly added dot-symbols. */
4231
4232 if (string[0] == '.')
4233 {
4234 struct ppc_link_hash_table *htab;
4235
4236 htab = (struct ppc_link_hash_table *) table;
4237 eh->u.next_dot_sym = htab->dot_syms;
4238 htab->dot_syms = eh;
4239 }
4240 }
4241
4242 return entry;
4243 }
4244
4245 struct tocsave_entry {
4246 asection *sec;
4247 bfd_vma offset;
4248 };
4249
4250 static hashval_t
4251 tocsave_htab_hash (const void *p)
4252 {
4253 const struct tocsave_entry *e = (const struct tocsave_entry *) p;
4254 return ((bfd_vma)(intptr_t) e->sec ^ e->offset) >> 3;
4255 }
4256
4257 static int
4258 tocsave_htab_eq (const void *p1, const void *p2)
4259 {
4260 const struct tocsave_entry *e1 = (const struct tocsave_entry *) p1;
4261 const struct tocsave_entry *e2 = (const struct tocsave_entry *) p2;
4262 return e1->sec == e2->sec && e1->offset == e2->offset;
4263 }
4264
4265 /* Destroy a ppc64 ELF linker hash table. */
4266
4267 static void
4268 ppc64_elf_link_hash_table_free (bfd *obfd)
4269 {
4270 struct ppc_link_hash_table *htab;
4271
4272 htab = (struct ppc_link_hash_table *) obfd->link.hash;
4273 if (htab->tocsave_htab)
4274 htab_delete (htab->tocsave_htab);
4275 bfd_hash_table_free (&htab->branch_hash_table);
4276 bfd_hash_table_free (&htab->stub_hash_table);
4277 _bfd_elf_link_hash_table_free (obfd);
4278 }
4279
4280 /* Create a ppc64 ELF linker hash table. */
4281
4282 static struct bfd_link_hash_table *
4283 ppc64_elf_link_hash_table_create (bfd *abfd)
4284 {
4285 struct ppc_link_hash_table *htab;
4286 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
4287
4288 htab = bfd_zmalloc (amt);
4289 if (htab == NULL)
4290 return NULL;
4291
4292 if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc,
4293 sizeof (struct ppc_link_hash_entry),
4294 PPC64_ELF_DATA))
4295 {
4296 free (htab);
4297 return NULL;
4298 }
4299
4300 /* Init the stub hash table too. */
4301 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc,
4302 sizeof (struct ppc_stub_hash_entry)))
4303 {
4304 _bfd_elf_link_hash_table_free (abfd);
4305 return NULL;
4306 }
4307
4308 /* And the branch hash table. */
4309 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc,
4310 sizeof (struct ppc_branch_hash_entry)))
4311 {
4312 bfd_hash_table_free (&htab->stub_hash_table);
4313 _bfd_elf_link_hash_table_free (abfd);
4314 return NULL;
4315 }
4316
4317 htab->tocsave_htab = htab_try_create (1024,
4318 tocsave_htab_hash,
4319 tocsave_htab_eq,
4320 NULL);
4321 if (htab->tocsave_htab == NULL)
4322 {
4323 ppc64_elf_link_hash_table_free (abfd);
4324 return NULL;
4325 }
4326 htab->elf.root.hash_table_free = ppc64_elf_link_hash_table_free;
4327
4328 /* Initializing two fields of the union is just cosmetic. We really
4329 only care about glist, but when compiled on a 32-bit host the
4330 bfd_vma fields are larger. Setting the bfd_vma to zero makes
4331 debugger inspection of these fields look nicer. */
4332 htab->elf.init_got_refcount.refcount = 0;
4333 htab->elf.init_got_refcount.glist = NULL;
4334 htab->elf.init_plt_refcount.refcount = 0;
4335 htab->elf.init_plt_refcount.glist = NULL;
4336 htab->elf.init_got_offset.offset = 0;
4337 htab->elf.init_got_offset.glist = NULL;
4338 htab->elf.init_plt_offset.offset = 0;
4339 htab->elf.init_plt_offset.glist = NULL;
4340
4341 return &htab->elf.root;
4342 }
4343
4344 /* Create sections for linker generated code. */
4345
4346 static bfd_boolean
4347 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
4348 {
4349 struct ppc_link_hash_table *htab;
4350 flagword flags;
4351
4352 htab = ppc_hash_table (info);
4353
4354 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
4355 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4356 if (htab->params->save_restore_funcs)
4357 {
4358 /* Create .sfpr for code to save and restore fp regs. */
4359 htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr",
4360 flags);
4361 if (htab->sfpr == NULL
4362 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
4363 return FALSE;
4364 }
4365
4366 if (bfd_link_relocatable (info))
4367 return TRUE;
4368
4369 /* Create .glink for lazy dynamic linking support. */
4370 htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink",
4371 flags);
4372 if (htab->glink == NULL
4373 || ! bfd_set_section_alignment (dynobj, htab->glink, 3))
4374 return FALSE;
4375
4376 if (!info->no_ld_generated_unwind_info)
4377 {
4378 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
4379 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4380 htab->glink_eh_frame = bfd_make_section_anyway_with_flags (dynobj,
4381 ".eh_frame",
4382 flags);
4383 if (htab->glink_eh_frame == NULL
4384 || !bfd_set_section_alignment (dynobj, htab->glink_eh_frame, 2))
4385 return FALSE;
4386 }
4387
4388 flags = SEC_ALLOC | SEC_LINKER_CREATED;
4389 htab->elf.iplt = bfd_make_section_anyway_with_flags (dynobj, ".iplt", flags);
4390 if (htab->elf.iplt == NULL
4391 || ! bfd_set_section_alignment (dynobj, htab->elf.iplt, 3))
4392 return FALSE;
4393
4394 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4395 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4396 htab->elf.irelplt
4397 = bfd_make_section_anyway_with_flags (dynobj, ".rela.iplt", flags);
4398 if (htab->elf.irelplt == NULL
4399 || ! bfd_set_section_alignment (dynobj, htab->elf.irelplt, 3))
4400 return FALSE;
4401
4402 /* Create branch lookup table for plt_branch stubs. */
4403 flags = (SEC_ALLOC | SEC_LOAD
4404 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4405 htab->brlt = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt",
4406 flags);
4407 if (htab->brlt == NULL
4408 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
4409 return FALSE;
4410
4411 if (!bfd_link_pic (info))
4412 return TRUE;
4413
4414 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4415 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4416 htab->relbrlt = bfd_make_section_anyway_with_flags (dynobj,
4417 ".rela.branch_lt",
4418 flags);
4419 if (htab->relbrlt == NULL
4420 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
4421 return FALSE;
4422
4423 return TRUE;
4424 }
4425
4426 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
4427
4428 bfd_boolean
4429 ppc64_elf_init_stub_bfd (struct bfd_link_info *info,
4430 struct ppc64_elf_params *params)
4431 {
4432 struct ppc_link_hash_table *htab;
4433
4434 elf_elfheader (params->stub_bfd)->e_ident[EI_CLASS] = ELFCLASS64;
4435
4436 /* Always hook our dynamic sections into the first bfd, which is the
4437 linker created stub bfd. This ensures that the GOT header is at
4438 the start of the output TOC section. */
4439 htab = ppc_hash_table (info);
4440 htab->elf.dynobj = params->stub_bfd;
4441 htab->params = params;
4442
4443 return create_linkage_sections (htab->elf.dynobj, info);
4444 }
4445
4446 /* Build a name for an entry in the stub hash table. */
4447
4448 static char *
4449 ppc_stub_name (const asection *input_section,
4450 const asection *sym_sec,
4451 const struct ppc_link_hash_entry *h,
4452 const Elf_Internal_Rela *rel)
4453 {
4454 char *stub_name;
4455 ssize_t len;
4456
4457 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
4458 offsets from a sym as a branch target? In fact, we could
4459 probably assume the addend is always zero. */
4460 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
4461
4462 if (h)
4463 {
4464 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
4465 stub_name = bfd_malloc (len);
4466 if (stub_name == NULL)
4467 return stub_name;
4468
4469 len = sprintf (stub_name, "%08x.%s+%x",
4470 input_section->id & 0xffffffff,
4471 h->elf.root.root.string,
4472 (int) rel->r_addend & 0xffffffff);
4473 }
4474 else
4475 {
4476 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
4477 stub_name = bfd_malloc (len);
4478 if (stub_name == NULL)
4479 return stub_name;
4480
4481 len = sprintf (stub_name, "%08x.%x:%x+%x",
4482 input_section->id & 0xffffffff,
4483 sym_sec->id & 0xffffffff,
4484 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
4485 (int) rel->r_addend & 0xffffffff);
4486 }
4487 if (len > 2 && stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
4488 stub_name[len - 2] = 0;
4489 return stub_name;
4490 }
4491
4492 /* Look up an entry in the stub hash. Stub entries are cached because
4493 creating the stub name takes a bit of time. */
4494
4495 static struct ppc_stub_hash_entry *
4496 ppc_get_stub_entry (const asection *input_section,
4497 const asection *sym_sec,
4498 struct ppc_link_hash_entry *h,
4499 const Elf_Internal_Rela *rel,
4500 struct ppc_link_hash_table *htab)
4501 {
4502 struct ppc_stub_hash_entry *stub_entry;
4503 struct map_stub *group;
4504
4505 /* If this input section is part of a group of sections sharing one
4506 stub section, then use the id of the first section in the group.
4507 Stub names need to include a section id, as there may well be
4508 more than one stub used to reach say, printf, and we need to
4509 distinguish between them. */
4510 group = htab->sec_info[input_section->id].u.group;
4511 if (group == NULL)
4512 return NULL;
4513
4514 if (h != NULL && h->u.stub_cache != NULL
4515 && h->u.stub_cache->h == h
4516 && h->u.stub_cache->group == group)
4517 {
4518 stub_entry = h->u.stub_cache;
4519 }
4520 else
4521 {
4522 char *stub_name;
4523
4524 stub_name = ppc_stub_name (group->link_sec, sym_sec, h, rel);
4525 if (stub_name == NULL)
4526 return NULL;
4527
4528 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
4529 stub_name, FALSE, FALSE);
4530 if (h != NULL)
4531 h->u.stub_cache = stub_entry;
4532
4533 free (stub_name);
4534 }
4535
4536 return stub_entry;
4537 }
4538
4539 /* Add a new stub entry to the stub hash. Not all fields of the new
4540 stub entry are initialised. */
4541
4542 static struct ppc_stub_hash_entry *
4543 ppc_add_stub (const char *stub_name,
4544 asection *section,
4545 struct bfd_link_info *info)
4546 {
4547 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4548 struct map_stub *group;
4549 asection *link_sec;
4550 asection *stub_sec;
4551 struct ppc_stub_hash_entry *stub_entry;
4552
4553 group = htab->sec_info[section->id].u.group;
4554 link_sec = group->link_sec;
4555 stub_sec = group->stub_sec;
4556 if (stub_sec == NULL)
4557 {
4558 size_t namelen;
4559 bfd_size_type len;
4560 char *s_name;
4561
4562 namelen = strlen (link_sec->name);
4563 len = namelen + sizeof (STUB_SUFFIX);
4564 s_name = bfd_alloc (htab->params->stub_bfd, len);
4565 if (s_name == NULL)
4566 return NULL;
4567
4568 memcpy (s_name, link_sec->name, namelen);
4569 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
4570 stub_sec = (*htab->params->add_stub_section) (s_name, link_sec);
4571 if (stub_sec == NULL)
4572 return NULL;
4573 group->stub_sec = stub_sec;
4574 }
4575
4576 /* Enter this entry into the linker stub hash table. */
4577 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
4578 TRUE, FALSE);
4579 if (stub_entry == NULL)
4580 {
4581 info->callbacks->einfo (_("%P: %B: cannot create stub entry %s\n"),
4582 section->owner, stub_name);
4583 return NULL;
4584 }
4585
4586 stub_entry->group = group;
4587 stub_entry->stub_offset = 0;
4588 return stub_entry;
4589 }
4590
4591 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
4592 not already done. */
4593
4594 static bfd_boolean
4595 create_got_section (bfd *abfd, struct bfd_link_info *info)
4596 {
4597 asection *got, *relgot;
4598 flagword flags;
4599 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4600
4601 if (!is_ppc64_elf (abfd))
4602 return FALSE;
4603 if (htab == NULL)
4604 return FALSE;
4605
4606 if (!htab->elf.sgot
4607 && !_bfd_elf_create_got_section (htab->elf.dynobj, info))
4608 return FALSE;
4609
4610 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
4611 | SEC_LINKER_CREATED);
4612
4613 got = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
4614 if (!got
4615 || !bfd_set_section_alignment (abfd, got, 3))
4616 return FALSE;
4617
4618 relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got",
4619 flags | SEC_READONLY);
4620 if (!relgot
4621 || ! bfd_set_section_alignment (abfd, relgot, 3))
4622 return FALSE;
4623
4624 ppc64_elf_tdata (abfd)->got = got;
4625 ppc64_elf_tdata (abfd)->relgot = relgot;
4626 return TRUE;
4627 }
4628
4629 /* Create the dynamic sections, and set up shortcuts. */
4630
4631 static bfd_boolean
4632 ppc64_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
4633 {
4634 struct ppc_link_hash_table *htab;
4635
4636 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
4637 return FALSE;
4638
4639 htab = ppc_hash_table (info);
4640 if (htab == NULL)
4641 return FALSE;
4642
4643 htab->dynbss = bfd_get_linker_section (dynobj, ".dynbss");
4644 if (!bfd_link_pic (info))
4645 htab->relbss = bfd_get_linker_section (dynobj, ".rela.bss");
4646
4647 if (!htab->elf.sgot || !htab->elf.splt || !htab->elf.srelplt || !htab->dynbss
4648 || (!bfd_link_pic (info) && !htab->relbss))
4649 abort ();
4650
4651 return TRUE;
4652 }
4653
4654 /* Follow indirect and warning symbol links. */
4655
4656 static inline struct bfd_link_hash_entry *
4657 follow_link (struct bfd_link_hash_entry *h)
4658 {
4659 while (h->type == bfd_link_hash_indirect
4660 || h->type == bfd_link_hash_warning)
4661 h = h->u.i.link;
4662 return h;
4663 }
4664
4665 static inline struct elf_link_hash_entry *
4666 elf_follow_link (struct elf_link_hash_entry *h)
4667 {
4668 return (struct elf_link_hash_entry *) follow_link (&h->root);
4669 }
4670
4671 static inline struct ppc_link_hash_entry *
4672 ppc_follow_link (struct ppc_link_hash_entry *h)
4673 {
4674 return (struct ppc_link_hash_entry *) follow_link (&h->elf.root);
4675 }
4676
4677 /* Merge PLT info on FROM with that on TO. */
4678
4679 static void
4680 move_plt_plist (struct ppc_link_hash_entry *from,
4681 struct ppc_link_hash_entry *to)
4682 {
4683 if (from->elf.plt.plist != NULL)
4684 {
4685 if (to->elf.plt.plist != NULL)
4686 {
4687 struct plt_entry **entp;
4688 struct plt_entry *ent;
4689
4690 for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; )
4691 {
4692 struct plt_entry *dent;
4693
4694 for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next)
4695 if (dent->addend == ent->addend)
4696 {
4697 dent->plt.refcount += ent->plt.refcount;
4698 *entp = ent->next;
4699 break;
4700 }
4701 if (dent == NULL)
4702 entp = &ent->next;
4703 }
4704 *entp = to->elf.plt.plist;
4705 }
4706
4707 to->elf.plt.plist = from->elf.plt.plist;
4708 from->elf.plt.plist = NULL;
4709 }
4710 }
4711
4712 /* Copy the extra info we tack onto an elf_link_hash_entry. */
4713
4714 static void
4715 ppc64_elf_copy_indirect_symbol (struct bfd_link_info *info,
4716 struct elf_link_hash_entry *dir,
4717 struct elf_link_hash_entry *ind)
4718 {
4719 struct ppc_link_hash_entry *edir, *eind;
4720
4721 edir = (struct ppc_link_hash_entry *) dir;
4722 eind = (struct ppc_link_hash_entry *) ind;
4723
4724 edir->is_func |= eind->is_func;
4725 edir->is_func_descriptor |= eind->is_func_descriptor;
4726 edir->tls_mask |= eind->tls_mask;
4727 if (eind->oh != NULL)
4728 edir->oh = ppc_follow_link (eind->oh);
4729
4730 /* If called to transfer flags for a weakdef during processing
4731 of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF.
4732 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
4733 if (!(ELIMINATE_COPY_RELOCS
4734 && eind->elf.root.type != bfd_link_hash_indirect
4735 && edir->elf.dynamic_adjusted))
4736 edir->elf.non_got_ref |= eind->elf.non_got_ref;
4737
4738 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
4739 edir->elf.ref_regular |= eind->elf.ref_regular;
4740 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
4741 edir->elf.needs_plt |= eind->elf.needs_plt;
4742 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed;
4743
4744 /* If we were called to copy over info for a weak sym, don't copy
4745 dyn_relocs, plt/got info, or dynindx. We used to copy dyn_relocs
4746 in order to simplify readonly_dynrelocs and save a field in the
4747 symbol hash entry, but that means dyn_relocs can't be used in any
4748 tests about a specific symbol, or affect other symbol flags which
4749 are then tested.
4750 Chain weakdefs so we can get from the weakdef back to an alias.
4751 The list is circular so that we don't need to use u.weakdef as
4752 well as this list to look at all aliases. */
4753 if (eind->elf.root.type != bfd_link_hash_indirect)
4754 {
4755 struct ppc_link_hash_entry *cur, *add, *next;
4756
4757 add = eind;
4758 do
4759 {
4760 cur = edir->weakref;
4761 if (cur != NULL)
4762 {
4763 do
4764 {
4765 /* We can be called twice for the same symbols.
4766 Don't make multiple loops. */
4767 if (cur == add)
4768 return;
4769 cur = cur->weakref;
4770 } while (cur != edir);
4771 }
4772 next = add->weakref;
4773 if (cur != add)
4774 {
4775 add->weakref = edir->weakref != NULL ? edir->weakref : edir;
4776 edir->weakref = add;
4777 }
4778 add = next;
4779 } while (add != NULL && add != eind);
4780 return;
4781 }
4782
4783 /* Copy over any dynamic relocs we may have on the indirect sym. */
4784 if (eind->dyn_relocs != NULL)
4785 {
4786 if (edir->dyn_relocs != NULL)
4787 {
4788 struct elf_dyn_relocs **pp;
4789 struct elf_dyn_relocs *p;
4790
4791 /* Add reloc counts against the indirect sym to the direct sym
4792 list. Merge any entries against the same section. */
4793 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
4794 {
4795 struct elf_dyn_relocs *q;
4796
4797 for (q = edir->dyn_relocs; q != NULL; q = q->next)
4798 if (q->sec == p->sec)
4799 {
4800 q->pc_count += p->pc_count;
4801 q->count += p->count;
4802 *pp = p->next;
4803 break;
4804 }
4805 if (q == NULL)
4806 pp = &p->next;
4807 }
4808 *pp = edir->dyn_relocs;
4809 }
4810
4811 edir->dyn_relocs = eind->dyn_relocs;
4812 eind->dyn_relocs = NULL;
4813 }
4814
4815 /* Copy over got entries that we may have already seen to the
4816 symbol which just became indirect. */
4817 if (eind->elf.got.glist != NULL)
4818 {
4819 if (edir->elf.got.glist != NULL)
4820 {
4821 struct got_entry **entp;
4822 struct got_entry *ent;
4823
4824 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
4825 {
4826 struct got_entry *dent;
4827
4828 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
4829 if (dent->addend == ent->addend
4830 && dent->owner == ent->owner
4831 && dent->tls_type == ent->tls_type)
4832 {
4833 dent->got.refcount += ent->got.refcount;
4834 *entp = ent->next;
4835 break;
4836 }
4837 if (dent == NULL)
4838 entp = &ent->next;
4839 }
4840 *entp = edir->elf.got.glist;
4841 }
4842
4843 edir->elf.got.glist = eind->elf.got.glist;
4844 eind->elf.got.glist = NULL;
4845 }
4846
4847 /* And plt entries. */
4848 move_plt_plist (eind, edir);
4849
4850 if (eind->elf.dynindx != -1)
4851 {
4852 if (edir->elf.dynindx != -1)
4853 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4854 edir->elf.dynstr_index);
4855 edir->elf.dynindx = eind->elf.dynindx;
4856 edir->elf.dynstr_index = eind->elf.dynstr_index;
4857 eind->elf.dynindx = -1;
4858 eind->elf.dynstr_index = 0;
4859 }
4860 }
4861
4862 /* Find the function descriptor hash entry from the given function code
4863 hash entry FH. Link the entries via their OH fields. */
4864
4865 static struct ppc_link_hash_entry *
4866 lookup_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
4867 {
4868 struct ppc_link_hash_entry *fdh = fh->oh;
4869
4870 if (fdh == NULL)
4871 {
4872 const char *fd_name = fh->elf.root.root.string + 1;
4873
4874 fdh = (struct ppc_link_hash_entry *)
4875 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
4876 if (fdh == NULL)
4877 return fdh;
4878
4879 fdh->is_func_descriptor = 1;
4880 fdh->oh = fh;
4881 fh->is_func = 1;
4882 fh->oh = fdh;
4883 }
4884
4885 return ppc_follow_link (fdh);
4886 }
4887
4888 /* Make a fake function descriptor sym for the code sym FH. */
4889
4890 static struct ppc_link_hash_entry *
4891 make_fdh (struct bfd_link_info *info,
4892 struct ppc_link_hash_entry *fh)
4893 {
4894 bfd *abfd;
4895 asymbol *newsym;
4896 struct bfd_link_hash_entry *bh;
4897 struct ppc_link_hash_entry *fdh;
4898
4899 abfd = fh->elf.root.u.undef.abfd;
4900 newsym = bfd_make_empty_symbol (abfd);
4901 newsym->name = fh->elf.root.root.string + 1;
4902 newsym->section = bfd_und_section_ptr;
4903 newsym->value = 0;
4904 newsym->flags = BSF_WEAK;
4905
4906 bh = NULL;
4907 if (!_bfd_generic_link_add_one_symbol (info, abfd, newsym->name,
4908 newsym->flags, newsym->section,
4909 newsym->value, NULL, FALSE, FALSE,
4910 &bh))
4911 return NULL;
4912
4913 fdh = (struct ppc_link_hash_entry *) bh;
4914 fdh->elf.non_elf = 0;
4915 fdh->fake = 1;
4916 fdh->is_func_descriptor = 1;
4917 fdh->oh = fh;
4918 fh->is_func = 1;
4919 fh->oh = fdh;
4920 return fdh;
4921 }
4922
4923 /* Fix function descriptor symbols defined in .opd sections to be
4924 function type. */
4925
4926 static bfd_boolean
4927 ppc64_elf_add_symbol_hook (bfd *ibfd,
4928 struct bfd_link_info *info,
4929 Elf_Internal_Sym *isym,
4930 const char **name,
4931 flagword *flags ATTRIBUTE_UNUSED,
4932 asection **sec,
4933 bfd_vma *value)
4934 {
4935 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC
4936 && (ibfd->flags & DYNAMIC) == 0
4937 && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour)
4938 elf_tdata (info->output_bfd)->has_gnu_symbols |= elf_gnu_symbol_ifunc;
4939
4940 if (*sec != NULL
4941 && strcmp ((*sec)->name, ".opd") == 0)
4942 {
4943 asection *code_sec;
4944
4945 if (!(ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC
4946 || ELF_ST_TYPE (isym->st_info) == STT_FUNC))
4947 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
4948
4949 /* If the symbol is a function defined in .opd, and the function
4950 code is in a discarded group, let it appear to be undefined. */
4951 if (!bfd_link_relocatable (info)
4952 && (*sec)->reloc_count != 0
4953 && opd_entry_value (*sec, *value, &code_sec, NULL,
4954 FALSE) != (bfd_vma) -1
4955 && discarded_section (code_sec))
4956 {
4957 *sec = bfd_und_section_ptr;
4958 isym->st_shndx = SHN_UNDEF;
4959 }
4960 }
4961 else if (*sec != NULL
4962 && strcmp ((*sec)->name, ".toc") == 0
4963 && ELF_ST_TYPE (isym->st_info) == STT_OBJECT)
4964 {
4965 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4966 if (htab != NULL)
4967 htab->params->object_in_toc = 1;
4968 }
4969
4970 if ((STO_PPC64_LOCAL_MASK & isym->st_other) != 0)
4971 {
4972 if (abiversion (ibfd) == 0)
4973 set_abiversion (ibfd, 2);
4974 else if (abiversion (ibfd) == 1)
4975 {
4976 info->callbacks->einfo (_("%P: symbol '%s' has invalid st_other"
4977 " for ABI version 1\n"), name);
4978 bfd_set_error (bfd_error_bad_value);
4979 return FALSE;
4980 }
4981 }
4982
4983 return TRUE;
4984 }
4985
4986 /* Merge non-visibility st_other attributes: local entry point. */
4987
4988 static void
4989 ppc64_elf_merge_symbol_attribute (struct elf_link_hash_entry *h,
4990 const Elf_Internal_Sym *isym,
4991 bfd_boolean definition,
4992 bfd_boolean dynamic)
4993 {
4994 if (definition && !dynamic)
4995 h->other = ((isym->st_other & ~ELF_ST_VISIBILITY (-1))
4996 | ELF_ST_VISIBILITY (h->other));
4997 }
4998
4999 /* This function makes an old ABI object reference to ".bar" cause the
5000 inclusion of a new ABI object archive that defines "bar".
5001 NAME is a symbol defined in an archive. Return a symbol in the hash
5002 table that might be satisfied by the archive symbols. */
5003
5004 static struct elf_link_hash_entry *
5005 ppc64_elf_archive_symbol_lookup (bfd *abfd,
5006 struct bfd_link_info *info,
5007 const char *name)
5008 {
5009 struct elf_link_hash_entry *h;
5010 char *dot_name;
5011 size_t len;
5012
5013 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
5014 if (h != NULL
5015 /* Don't return this sym if it is a fake function descriptor
5016 created by add_symbol_adjust. */
5017 && !(h->root.type == bfd_link_hash_undefweak
5018 && ((struct ppc_link_hash_entry *) h)->fake))
5019 return h;
5020
5021 if (name[0] == '.')
5022 return h;
5023
5024 len = strlen (name);
5025 dot_name = bfd_alloc (abfd, len + 2);
5026 if (dot_name == NULL)
5027 return (struct elf_link_hash_entry *) 0 - 1;
5028 dot_name[0] = '.';
5029 memcpy (dot_name + 1, name, len + 1);
5030 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
5031 bfd_release (abfd, dot_name);
5032 return h;
5033 }
5034
5035 /* This function satisfies all old ABI object references to ".bar" if a
5036 new ABI object defines "bar". Well, at least, undefined dot symbols
5037 are made weak. This stops later archive searches from including an
5038 object if we already have a function descriptor definition. It also
5039 prevents the linker complaining about undefined symbols.
5040 We also check and correct mismatched symbol visibility here. The
5041 most restrictive visibility of the function descriptor and the
5042 function entry symbol is used. */
5043
5044 static bfd_boolean
5045 add_symbol_adjust (struct ppc_link_hash_entry *eh, struct bfd_link_info *info)
5046 {
5047 struct ppc_link_hash_table *htab;
5048 struct ppc_link_hash_entry *fdh;
5049
5050 if (eh->elf.root.type == bfd_link_hash_indirect)
5051 return TRUE;
5052
5053 if (eh->elf.root.type == bfd_link_hash_warning)
5054 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
5055
5056 if (eh->elf.root.root.string[0] != '.')
5057 abort ();
5058
5059 htab = ppc_hash_table (info);
5060 if (htab == NULL)
5061 return FALSE;
5062
5063 fdh = lookup_fdh (eh, htab);
5064 if (fdh == NULL)
5065 {
5066 if (!bfd_link_relocatable (info)
5067 && (eh->elf.root.type == bfd_link_hash_undefined
5068 || eh->elf.root.type == bfd_link_hash_undefweak)
5069 && eh->elf.ref_regular)
5070 {
5071 /* Make an undefweak function descriptor sym, which is enough to
5072 pull in an --as-needed shared lib, but won't cause link
5073 errors. Archives are handled elsewhere. */
5074 fdh = make_fdh (info, eh);
5075 if (fdh == NULL)
5076 return FALSE;
5077 fdh->elf.ref_regular = 1;
5078 }
5079 }
5080 else
5081 {
5082 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
5083 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
5084 if (entry_vis < descr_vis)
5085 fdh->elf.other += entry_vis - descr_vis;
5086 else if (entry_vis > descr_vis)
5087 eh->elf.other += descr_vis - entry_vis;
5088
5089 if ((fdh->elf.root.type == bfd_link_hash_defined
5090 || fdh->elf.root.type == bfd_link_hash_defweak)
5091 && eh->elf.root.type == bfd_link_hash_undefined)
5092 {
5093 eh->elf.root.type = bfd_link_hash_undefweak;
5094 eh->was_undefined = 1;
5095 htab->twiddled_syms = 1;
5096 }
5097 }
5098
5099 return TRUE;
5100 }
5101
5102 /* Set up opd section info and abiversion for IBFD, and process list
5103 of dot-symbols we made in link_hash_newfunc. */
5104
5105 static bfd_boolean
5106 ppc64_elf_before_check_relocs (bfd *ibfd, struct bfd_link_info *info)
5107 {
5108 struct ppc_link_hash_table *htab;
5109 struct ppc_link_hash_entry **p, *eh;
5110 asection *opd = bfd_get_section_by_name (ibfd, ".opd");
5111
5112 if (opd != NULL && opd->size != 0)
5113 {
5114 if (abiversion (ibfd) == 0)
5115 set_abiversion (ibfd, 1);
5116 else if (abiversion (ibfd) >= 2)
5117 {
5118 info->callbacks->einfo (_("%P: %B .opd not allowed in ABI"
5119 " version %d\n"),
5120 ibfd, abiversion (ibfd));
5121 bfd_set_error (bfd_error_bad_value);
5122 return FALSE;
5123 }
5124
5125 if ((ibfd->flags & DYNAMIC) == 0
5126 && (opd->flags & SEC_RELOC) != 0
5127 && opd->reloc_count != 0
5128 && !bfd_is_abs_section (opd->output_section))
5129 {
5130 /* Garbage collection needs some extra help with .opd sections.
5131 We don't want to necessarily keep everything referenced by
5132 relocs in .opd, as that would keep all functions. Instead,
5133 if we reference an .opd symbol (a function descriptor), we
5134 want to keep the function code symbol's section. This is
5135 easy for global symbols, but for local syms we need to keep
5136 information about the associated function section. */
5137 bfd_size_type amt;
5138 asection **opd_sym_map;
5139
5140 amt = OPD_NDX (opd->size) * sizeof (*opd_sym_map);
5141 opd_sym_map = bfd_zalloc (ibfd, amt);
5142 if (opd_sym_map == NULL)
5143 return FALSE;
5144 ppc64_elf_section_data (opd)->u.opd.func_sec = opd_sym_map;
5145 BFD_ASSERT (ppc64_elf_section_data (opd)->sec_type == sec_normal);
5146 ppc64_elf_section_data (opd)->sec_type = sec_opd;
5147 }
5148 }
5149
5150 if (!is_ppc64_elf (info->output_bfd))
5151 return TRUE;
5152 htab = ppc_hash_table (info);
5153 if (htab == NULL)
5154 return FALSE;
5155
5156 /* For input files without an explicit abiversion in e_flags
5157 we should have flagged any with symbol st_other bits set
5158 as ELFv1 and above flagged those with .opd as ELFv2.
5159 Set the output abiversion if not yet set, and for any input
5160 still ambiguous, take its abiversion from the output.
5161 Differences in ABI are reported later. */
5162 if (abiversion (info->output_bfd) == 0)
5163 set_abiversion (info->output_bfd, abiversion (ibfd));
5164 else if (abiversion (ibfd) == 0)
5165 set_abiversion (ibfd, abiversion (info->output_bfd));
5166
5167 p = &htab->dot_syms;
5168 while ((eh = *p) != NULL)
5169 {
5170 *p = NULL;
5171 if (&eh->elf == htab->elf.hgot)
5172 ;
5173 else if (htab->elf.hgot == NULL
5174 && strcmp (eh->elf.root.root.string, ".TOC.") == 0)
5175 htab->elf.hgot = &eh->elf;
5176 else if (!add_symbol_adjust (eh, info))
5177 return FALSE;
5178 p = &eh->u.next_dot_sym;
5179 }
5180
5181 /* Clear the list for non-ppc64 input files. */
5182 p = &htab->dot_syms;
5183 while ((eh = *p) != NULL)
5184 {
5185 *p = NULL;
5186 p = &eh->u.next_dot_sym;
5187 }
5188
5189 /* We need to fix the undefs list for any syms we have twiddled to
5190 undefweak. */
5191 if (htab->twiddled_syms)
5192 {
5193 bfd_link_repair_undef_list (&htab->elf.root);
5194 htab->twiddled_syms = 0;
5195 }
5196 return TRUE;
5197 }
5198
5199 /* Undo hash table changes when an --as-needed input file is determined
5200 not to be needed. */
5201
5202 static bfd_boolean
5203 ppc64_elf_notice_as_needed (bfd *ibfd,
5204 struct bfd_link_info *info,
5205 enum notice_asneeded_action act)
5206 {
5207 if (act == notice_not_needed)
5208 {
5209 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5210
5211 if (htab == NULL)
5212 return FALSE;
5213
5214 htab->dot_syms = NULL;
5215 }
5216 return _bfd_elf_notice_as_needed (ibfd, info, act);
5217 }
5218
5219 /* If --just-symbols against a final linked binary, then assume we need
5220 toc adjusting stubs when calling functions defined there. */
5221
5222 static void
5223 ppc64_elf_link_just_syms (asection *sec, struct bfd_link_info *info)
5224 {
5225 if ((sec->flags & SEC_CODE) != 0
5226 && (sec->owner->flags & (EXEC_P | DYNAMIC)) != 0
5227 && is_ppc64_elf (sec->owner))
5228 {
5229 if (abiversion (sec->owner) >= 2
5230 || bfd_get_section_by_name (sec->owner, ".opd") != NULL)
5231 sec->has_toc_reloc = 1;
5232 }
5233 _bfd_elf_link_just_syms (sec, info);
5234 }
5235
5236 static struct plt_entry **
5237 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
5238 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
5239 {
5240 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
5241 struct plt_entry **local_plt;
5242 unsigned char *local_got_tls_masks;
5243
5244 if (local_got_ents == NULL)
5245 {
5246 bfd_size_type size = symtab_hdr->sh_info;
5247
5248 size *= (sizeof (*local_got_ents)
5249 + sizeof (*local_plt)
5250 + sizeof (*local_got_tls_masks));
5251 local_got_ents = bfd_zalloc (abfd, size);
5252 if (local_got_ents == NULL)
5253 return NULL;
5254 elf_local_got_ents (abfd) = local_got_ents;
5255 }
5256
5257 if ((tls_type & (PLT_IFUNC | TLS_EXPLICIT)) == 0)
5258 {
5259 struct got_entry *ent;
5260
5261 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
5262 if (ent->addend == r_addend
5263 && ent->owner == abfd
5264 && ent->tls_type == tls_type)
5265 break;
5266 if (ent == NULL)
5267 {
5268 bfd_size_type amt = sizeof (*ent);
5269 ent = bfd_alloc (abfd, amt);
5270 if (ent == NULL)
5271 return FALSE;
5272 ent->next = local_got_ents[r_symndx];
5273 ent->addend = r_addend;
5274 ent->owner = abfd;
5275 ent->tls_type = tls_type;
5276 ent->is_indirect = FALSE;
5277 ent->got.refcount = 0;
5278 local_got_ents[r_symndx] = ent;
5279 }
5280 ent->got.refcount += 1;
5281 }
5282
5283 local_plt = (struct plt_entry **) (local_got_ents + symtab_hdr->sh_info);
5284 local_got_tls_masks = (unsigned char *) (local_plt + symtab_hdr->sh_info);
5285 local_got_tls_masks[r_symndx] |= tls_type;
5286
5287 return local_plt + r_symndx;
5288 }
5289
5290 static bfd_boolean
5291 update_plt_info (bfd *abfd, struct plt_entry **plist, bfd_vma addend)
5292 {
5293 struct plt_entry *ent;
5294
5295 for (ent = *plist; ent != NULL; ent = ent->next)
5296 if (ent->addend == addend)
5297 break;
5298 if (ent == NULL)
5299 {
5300 bfd_size_type amt = sizeof (*ent);
5301 ent = bfd_alloc (abfd, amt);
5302 if (ent == NULL)
5303 return FALSE;
5304 ent->next = *plist;
5305 ent->addend = addend;
5306 ent->plt.refcount = 0;
5307 *plist = ent;
5308 }
5309 ent->plt.refcount += 1;
5310 return TRUE;
5311 }
5312
5313 static bfd_boolean
5314 is_branch_reloc (enum elf_ppc64_reloc_type r_type)
5315 {
5316 return (r_type == R_PPC64_REL24
5317 || r_type == R_PPC64_REL14
5318 || r_type == R_PPC64_REL14_BRTAKEN
5319 || r_type == R_PPC64_REL14_BRNTAKEN
5320 || r_type == R_PPC64_ADDR24
5321 || r_type == R_PPC64_ADDR14
5322 || r_type == R_PPC64_ADDR14_BRTAKEN
5323 || r_type == R_PPC64_ADDR14_BRNTAKEN);
5324 }
5325
5326 /* Look through the relocs for a section during the first phase, and
5327 calculate needed space in the global offset table, procedure
5328 linkage table, and dynamic reloc sections. */
5329
5330 static bfd_boolean
5331 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
5332 asection *sec, const Elf_Internal_Rela *relocs)
5333 {
5334 struct ppc_link_hash_table *htab;
5335 Elf_Internal_Shdr *symtab_hdr;
5336 struct elf_link_hash_entry **sym_hashes;
5337 const Elf_Internal_Rela *rel;
5338 const Elf_Internal_Rela *rel_end;
5339 asection *sreloc;
5340 asection **opd_sym_map;
5341 struct elf_link_hash_entry *tga, *dottga;
5342
5343 if (bfd_link_relocatable (info))
5344 return TRUE;
5345
5346 /* Don't do anything special with non-loaded, non-alloced sections.
5347 In particular, any relocs in such sections should not affect GOT
5348 and PLT reference counting (ie. we don't allow them to create GOT
5349 or PLT entries), there's no possibility or desire to optimize TLS
5350 relocs, and there's not much point in propagating relocs to shared
5351 libs that the dynamic linker won't relocate. */
5352 if ((sec->flags & SEC_ALLOC) == 0)
5353 return TRUE;
5354
5355 BFD_ASSERT (is_ppc64_elf (abfd));
5356
5357 htab = ppc_hash_table (info);
5358 if (htab == NULL)
5359 return FALSE;
5360
5361 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
5362 FALSE, FALSE, TRUE);
5363 dottga = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
5364 FALSE, FALSE, TRUE);
5365 symtab_hdr = &elf_symtab_hdr (abfd);
5366 sym_hashes = elf_sym_hashes (abfd);
5367 sreloc = NULL;
5368 opd_sym_map = NULL;
5369 if (ppc64_elf_section_data (sec) != NULL
5370 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
5371 opd_sym_map = ppc64_elf_section_data (sec)->u.opd.func_sec;
5372
5373 rel_end = relocs + sec->reloc_count;
5374 for (rel = relocs; rel < rel_end; rel++)
5375 {
5376 unsigned long r_symndx;
5377 struct elf_link_hash_entry *h;
5378 enum elf_ppc64_reloc_type r_type;
5379 int tls_type;
5380 struct _ppc64_elf_section_data *ppc64_sec;
5381 struct plt_entry **ifunc, **plt_list;
5382
5383 r_symndx = ELF64_R_SYM (rel->r_info);
5384 if (r_symndx < symtab_hdr->sh_info)
5385 h = NULL;
5386 else
5387 {
5388 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5389 h = elf_follow_link (h);
5390
5391 /* PR15323, ref flags aren't set for references in the same
5392 object. */
5393 h->root.non_ir_ref = 1;
5394
5395 if (h == htab->elf.hgot)
5396 sec->has_toc_reloc = 1;
5397 }
5398
5399 tls_type = 0;
5400 ifunc = NULL;
5401 if (h != NULL)
5402 {
5403 if (h->type == STT_GNU_IFUNC)
5404 {
5405 h->needs_plt = 1;
5406 ifunc = &h->plt.plist;
5407 }
5408 }
5409 else
5410 {
5411 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5412 abfd, r_symndx);
5413 if (isym == NULL)
5414 return FALSE;
5415
5416 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
5417 {
5418 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
5419 rel->r_addend, PLT_IFUNC);
5420 if (ifunc == NULL)
5421 return FALSE;
5422 }
5423 }
5424
5425 r_type = ELF64_R_TYPE (rel->r_info);
5426 switch (r_type)
5427 {
5428 case R_PPC64_TLSGD:
5429 case R_PPC64_TLSLD:
5430 /* These special tls relocs tie a call to __tls_get_addr with
5431 its parameter symbol. */
5432 break;
5433
5434 case R_PPC64_GOT_TLSLD16:
5435 case R_PPC64_GOT_TLSLD16_LO:
5436 case R_PPC64_GOT_TLSLD16_HI:
5437 case R_PPC64_GOT_TLSLD16_HA:
5438 tls_type = TLS_TLS | TLS_LD;
5439 goto dogottls;
5440
5441 case R_PPC64_GOT_TLSGD16:
5442 case R_PPC64_GOT_TLSGD16_LO:
5443 case R_PPC64_GOT_TLSGD16_HI:
5444 case R_PPC64_GOT_TLSGD16_HA:
5445 tls_type = TLS_TLS | TLS_GD;
5446 goto dogottls;
5447
5448 case R_PPC64_GOT_TPREL16_DS:
5449 case R_PPC64_GOT_TPREL16_LO_DS:
5450 case R_PPC64_GOT_TPREL16_HI:
5451 case R_PPC64_GOT_TPREL16_HA:
5452 if (bfd_link_pic (info))
5453 info->flags |= DF_STATIC_TLS;
5454 tls_type = TLS_TLS | TLS_TPREL;
5455 goto dogottls;
5456
5457 case R_PPC64_GOT_DTPREL16_DS:
5458 case R_PPC64_GOT_DTPREL16_LO_DS:
5459 case R_PPC64_GOT_DTPREL16_HI:
5460 case R_PPC64_GOT_DTPREL16_HA:
5461 tls_type = TLS_TLS | TLS_DTPREL;
5462 dogottls:
5463 sec->has_tls_reloc = 1;
5464 /* Fall thru */
5465
5466 case R_PPC64_GOT16:
5467 case R_PPC64_GOT16_DS:
5468 case R_PPC64_GOT16_HA:
5469 case R_PPC64_GOT16_HI:
5470 case R_PPC64_GOT16_LO:
5471 case R_PPC64_GOT16_LO_DS:
5472 /* This symbol requires a global offset table entry. */
5473 sec->has_toc_reloc = 1;
5474 if (r_type == R_PPC64_GOT_TLSLD16
5475 || r_type == R_PPC64_GOT_TLSGD16
5476 || r_type == R_PPC64_GOT_TPREL16_DS
5477 || r_type == R_PPC64_GOT_DTPREL16_DS
5478 || r_type == R_PPC64_GOT16
5479 || r_type == R_PPC64_GOT16_DS)
5480 {
5481 htab->do_multi_toc = 1;
5482 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5483 }
5484
5485 if (ppc64_elf_tdata (abfd)->got == NULL
5486 && !create_got_section (abfd, info))
5487 return FALSE;
5488
5489 if (h != NULL)
5490 {
5491 struct ppc_link_hash_entry *eh;
5492 struct got_entry *ent;
5493
5494 eh = (struct ppc_link_hash_entry *) h;
5495 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
5496 if (ent->addend == rel->r_addend
5497 && ent->owner == abfd
5498 && ent->tls_type == tls_type)
5499 break;
5500 if (ent == NULL)
5501 {
5502 bfd_size_type amt = sizeof (*ent);
5503 ent = bfd_alloc (abfd, amt);
5504 if (ent == NULL)
5505 return FALSE;
5506 ent->next = eh->elf.got.glist;
5507 ent->addend = rel->r_addend;
5508 ent->owner = abfd;
5509 ent->tls_type = tls_type;
5510 ent->is_indirect = FALSE;
5511 ent->got.refcount = 0;
5512 eh->elf.got.glist = ent;
5513 }
5514 ent->got.refcount += 1;
5515 eh->tls_mask |= tls_type;
5516 }
5517 else
5518 /* This is a global offset table entry for a local symbol. */
5519 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5520 rel->r_addend, tls_type))
5521 return FALSE;
5522
5523 /* We may also need a plt entry if the symbol turns out to be
5524 an ifunc. */
5525 if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1)
5526 {
5527 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5528 return FALSE;
5529 }
5530 break;
5531
5532 case R_PPC64_PLT16_HA:
5533 case R_PPC64_PLT16_HI:
5534 case R_PPC64_PLT16_LO:
5535 case R_PPC64_PLT32:
5536 case R_PPC64_PLT64:
5537 /* This symbol requires a procedure linkage table entry. */
5538 plt_list = ifunc;
5539 if (h != NULL)
5540 {
5541 h->needs_plt = 1;
5542 if (h->root.root.string[0] == '.'
5543 && h->root.root.string[1] != '\0')
5544 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5545 plt_list = &h->plt.plist;
5546 }
5547 if (plt_list == NULL)
5548 {
5549 /* It does not make sense to have a procedure linkage
5550 table entry for a non-ifunc local symbol. */
5551 info->callbacks->einfo
5552 (_("%P: %H: %s reloc against local symbol\n"),
5553 abfd, sec, rel->r_offset,
5554 ppc64_elf_howto_table[r_type]->name);
5555 bfd_set_error (bfd_error_bad_value);
5556 return FALSE;
5557 }
5558 if (!update_plt_info (abfd, plt_list, rel->r_addend))
5559 return FALSE;
5560 break;
5561
5562 /* The following relocations don't need to propagate the
5563 relocation if linking a shared object since they are
5564 section relative. */
5565 case R_PPC64_SECTOFF:
5566 case R_PPC64_SECTOFF_LO:
5567 case R_PPC64_SECTOFF_HI:
5568 case R_PPC64_SECTOFF_HA:
5569 case R_PPC64_SECTOFF_DS:
5570 case R_PPC64_SECTOFF_LO_DS:
5571 case R_PPC64_DTPREL16:
5572 case R_PPC64_DTPREL16_LO:
5573 case R_PPC64_DTPREL16_HI:
5574 case R_PPC64_DTPREL16_HA:
5575 case R_PPC64_DTPREL16_DS:
5576 case R_PPC64_DTPREL16_LO_DS:
5577 case R_PPC64_DTPREL16_HIGH:
5578 case R_PPC64_DTPREL16_HIGHA:
5579 case R_PPC64_DTPREL16_HIGHER:
5580 case R_PPC64_DTPREL16_HIGHERA:
5581 case R_PPC64_DTPREL16_HIGHEST:
5582 case R_PPC64_DTPREL16_HIGHESTA:
5583 break;
5584
5585 /* Nor do these. */
5586 case R_PPC64_REL16:
5587 case R_PPC64_REL16_LO:
5588 case R_PPC64_REL16_HI:
5589 case R_PPC64_REL16_HA:
5590 case R_PPC64_REL16DX_HA:
5591 break;
5592
5593 /* Not supported as a dynamic relocation. */
5594 case R_PPC64_ADDR64_LOCAL:
5595 if (bfd_link_pic (info))
5596 {
5597 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
5598 ppc_howto_init ();
5599 info->callbacks->einfo (_("%P: %H: %s reloc unsupported "
5600 "in shared libraries and PIEs.\n"),
5601 abfd, sec, rel->r_offset,
5602 ppc64_elf_howto_table[r_type]->name);
5603 bfd_set_error (bfd_error_bad_value);
5604 return FALSE;
5605 }
5606 break;
5607
5608 case R_PPC64_TOC16:
5609 case R_PPC64_TOC16_DS:
5610 htab->do_multi_toc = 1;
5611 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5612 case R_PPC64_TOC16_LO:
5613 case R_PPC64_TOC16_HI:
5614 case R_PPC64_TOC16_HA:
5615 case R_PPC64_TOC16_LO_DS:
5616 sec->has_toc_reloc = 1;
5617 break;
5618
5619 /* Marker reloc. */
5620 case R_PPC64_ENTRY:
5621 break;
5622
5623 /* This relocation describes the C++ object vtable hierarchy.
5624 Reconstruct it for later use during GC. */
5625 case R_PPC64_GNU_VTINHERIT:
5626 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
5627 return FALSE;
5628 break;
5629
5630 /* This relocation describes which C++ vtable entries are actually
5631 used. Record for later use during GC. */
5632 case R_PPC64_GNU_VTENTRY:
5633 BFD_ASSERT (h != NULL);
5634 if (h != NULL
5635 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
5636 return FALSE;
5637 break;
5638
5639 case R_PPC64_REL14:
5640 case R_PPC64_REL14_BRTAKEN:
5641 case R_PPC64_REL14_BRNTAKEN:
5642 {
5643 asection *dest = NULL;
5644
5645 /* Heuristic: If jumping outside our section, chances are
5646 we are going to need a stub. */
5647 if (h != NULL)
5648 {
5649 /* If the sym is weak it may be overridden later, so
5650 don't assume we know where a weak sym lives. */
5651 if (h->root.type == bfd_link_hash_defined)
5652 dest = h->root.u.def.section;
5653 }
5654 else
5655 {
5656 Elf_Internal_Sym *isym;
5657
5658 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5659 abfd, r_symndx);
5660 if (isym == NULL)
5661 return FALSE;
5662
5663 dest = bfd_section_from_elf_index (abfd, isym->st_shndx);
5664 }
5665
5666 if (dest != sec)
5667 ppc64_elf_section_data (sec)->has_14bit_branch = 1;
5668 }
5669 /* Fall through. */
5670
5671 case R_PPC64_REL24:
5672 plt_list = ifunc;
5673 if (h != NULL)
5674 {
5675 h->needs_plt = 1;
5676 if (h->root.root.string[0] == '.'
5677 && h->root.root.string[1] != '\0')
5678 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5679
5680 if (h == tga || h == dottga)
5681 {
5682 sec->has_tls_reloc = 1;
5683 if (rel != relocs
5684 && (ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSGD
5685 || ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSLD))
5686 /* We have a new-style __tls_get_addr call with
5687 a marker reloc. */
5688 ;
5689 else
5690 /* Mark this section as having an old-style call. */
5691 sec->has_tls_get_addr_call = 1;
5692 }
5693 plt_list = &h->plt.plist;
5694 }
5695
5696 /* We may need a .plt entry if the function this reloc
5697 refers to is in a shared lib. */
5698 if (plt_list
5699 && !update_plt_info (abfd, plt_list, rel->r_addend))
5700 return FALSE;
5701 break;
5702
5703 case R_PPC64_ADDR14:
5704 case R_PPC64_ADDR14_BRNTAKEN:
5705 case R_PPC64_ADDR14_BRTAKEN:
5706 case R_PPC64_ADDR24:
5707 goto dodyn;
5708
5709 case R_PPC64_TPREL64:
5710 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
5711 if (bfd_link_pic (info))
5712 info->flags |= DF_STATIC_TLS;
5713 goto dotlstoc;
5714
5715 case R_PPC64_DTPMOD64:
5716 if (rel + 1 < rel_end
5717 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
5718 && rel[1].r_offset == rel->r_offset + 8)
5719 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
5720 else
5721 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
5722 goto dotlstoc;
5723
5724 case R_PPC64_DTPREL64:
5725 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
5726 if (rel != relocs
5727 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
5728 && rel[-1].r_offset == rel->r_offset - 8)
5729 /* This is the second reloc of a dtpmod, dtprel pair.
5730 Don't mark with TLS_DTPREL. */
5731 goto dodyn;
5732
5733 dotlstoc:
5734 sec->has_tls_reloc = 1;
5735 if (h != NULL)
5736 {
5737 struct ppc_link_hash_entry *eh;
5738 eh = (struct ppc_link_hash_entry *) h;
5739 eh->tls_mask |= tls_type;
5740 }
5741 else
5742 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5743 rel->r_addend, tls_type))
5744 return FALSE;
5745
5746 ppc64_sec = ppc64_elf_section_data (sec);
5747 if (ppc64_sec->sec_type != sec_toc)
5748 {
5749 bfd_size_type amt;
5750
5751 /* One extra to simplify get_tls_mask. */
5752 amt = sec->size * sizeof (unsigned) / 8 + sizeof (unsigned);
5753 ppc64_sec->u.toc.symndx = bfd_zalloc (abfd, amt);
5754 if (ppc64_sec->u.toc.symndx == NULL)
5755 return FALSE;
5756 amt = sec->size * sizeof (bfd_vma) / 8;
5757 ppc64_sec->u.toc.add = bfd_zalloc (abfd, amt);
5758 if (ppc64_sec->u.toc.add == NULL)
5759 return FALSE;
5760 BFD_ASSERT (ppc64_sec->sec_type == sec_normal);
5761 ppc64_sec->sec_type = sec_toc;
5762 }
5763 BFD_ASSERT (rel->r_offset % 8 == 0);
5764 ppc64_sec->u.toc.symndx[rel->r_offset / 8] = r_symndx;
5765 ppc64_sec->u.toc.add[rel->r_offset / 8] = rel->r_addend;
5766
5767 /* Mark the second slot of a GD or LD entry.
5768 -1 to indicate GD and -2 to indicate LD. */
5769 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
5770 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -1;
5771 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
5772 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -2;
5773 goto dodyn;
5774
5775 case R_PPC64_TPREL16:
5776 case R_PPC64_TPREL16_LO:
5777 case R_PPC64_TPREL16_HI:
5778 case R_PPC64_TPREL16_HA:
5779 case R_PPC64_TPREL16_DS:
5780 case R_PPC64_TPREL16_LO_DS:
5781 case R_PPC64_TPREL16_HIGH:
5782 case R_PPC64_TPREL16_HIGHA:
5783 case R_PPC64_TPREL16_HIGHER:
5784 case R_PPC64_TPREL16_HIGHERA:
5785 case R_PPC64_TPREL16_HIGHEST:
5786 case R_PPC64_TPREL16_HIGHESTA:
5787 if (bfd_link_pic (info))
5788 {
5789 info->flags |= DF_STATIC_TLS;
5790 goto dodyn;
5791 }
5792 break;
5793
5794 case R_PPC64_ADDR64:
5795 if (opd_sym_map != NULL
5796 && rel + 1 < rel_end
5797 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
5798 {
5799 if (h != NULL)
5800 {
5801 if (h->root.root.string[0] == '.'
5802 && h->root.root.string[1] != 0
5803 && lookup_fdh ((struct ppc_link_hash_entry *) h, htab))
5804 ;
5805 else
5806 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5807 }
5808 else
5809 {
5810 asection *s;
5811 Elf_Internal_Sym *isym;
5812
5813 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5814 abfd, r_symndx);
5815 if (isym == NULL)
5816 return FALSE;
5817
5818 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5819 if (s != NULL && s != sec)
5820 opd_sym_map[OPD_NDX (rel->r_offset)] = s;
5821 }
5822 }
5823 /* Fall through. */
5824
5825 case R_PPC64_ADDR16:
5826 case R_PPC64_ADDR16_DS:
5827 case R_PPC64_ADDR16_HA:
5828 case R_PPC64_ADDR16_HI:
5829 case R_PPC64_ADDR16_HIGH:
5830 case R_PPC64_ADDR16_HIGHA:
5831 case R_PPC64_ADDR16_HIGHER:
5832 case R_PPC64_ADDR16_HIGHERA:
5833 case R_PPC64_ADDR16_HIGHEST:
5834 case R_PPC64_ADDR16_HIGHESTA:
5835 case R_PPC64_ADDR16_LO:
5836 case R_PPC64_ADDR16_LO_DS:
5837 if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1
5838 && rel->r_addend == 0)
5839 {
5840 /* We may need a .plt entry if this reloc refers to a
5841 function in a shared lib. */
5842 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5843 return FALSE;
5844 h->pointer_equality_needed = 1;
5845 }
5846 /* Fall through. */
5847
5848 case R_PPC64_REL30:
5849 case R_PPC64_REL32:
5850 case R_PPC64_REL64:
5851 case R_PPC64_ADDR32:
5852 case R_PPC64_UADDR16:
5853 case R_PPC64_UADDR32:
5854 case R_PPC64_UADDR64:
5855 case R_PPC64_TOC:
5856 if (h != NULL && !bfd_link_pic (info))
5857 /* We may need a copy reloc. */
5858 h->non_got_ref = 1;
5859
5860 /* Don't propagate .opd relocs. */
5861 if (NO_OPD_RELOCS && opd_sym_map != NULL)
5862 break;
5863
5864 /* If we are creating a shared library, and this is a reloc
5865 against a global symbol, or a non PC relative reloc
5866 against a local symbol, then we need to copy the reloc
5867 into the shared library. However, if we are linking with
5868 -Bsymbolic, we do not need to copy a reloc against a
5869 global symbol which is defined in an object we are
5870 including in the link (i.e., DEF_REGULAR is set). At
5871 this point we have not seen all the input files, so it is
5872 possible that DEF_REGULAR is not set now but will be set
5873 later (it is never cleared). In case of a weak definition,
5874 DEF_REGULAR may be cleared later by a strong definition in
5875 a shared library. We account for that possibility below by
5876 storing information in the dyn_relocs field of the hash
5877 table entry. A similar situation occurs when creating
5878 shared libraries and symbol visibility changes render the
5879 symbol local.
5880
5881 If on the other hand, we are creating an executable, we
5882 may need to keep relocations for symbols satisfied by a
5883 dynamic library if we manage to avoid copy relocs for the
5884 symbol. */
5885 dodyn:
5886 if ((bfd_link_pic (info)
5887 && (must_be_dyn_reloc (info, r_type)
5888 || (h != NULL
5889 && (!SYMBOLIC_BIND (info, h)
5890 || h->root.type == bfd_link_hash_defweak
5891 || !h->def_regular))))
5892 || (ELIMINATE_COPY_RELOCS
5893 && !bfd_link_pic (info)
5894 && h != NULL
5895 && (h->root.type == bfd_link_hash_defweak
5896 || !h->def_regular))
5897 || (!bfd_link_pic (info)
5898 && ifunc != NULL))
5899 {
5900 /* We must copy these reloc types into the output file.
5901 Create a reloc section in dynobj and make room for
5902 this reloc. */
5903 if (sreloc == NULL)
5904 {
5905 sreloc = _bfd_elf_make_dynamic_reloc_section
5906 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
5907
5908 if (sreloc == NULL)
5909 return FALSE;
5910 }
5911
5912 /* If this is a global symbol, we count the number of
5913 relocations we need for this symbol. */
5914 if (h != NULL)
5915 {
5916 struct elf_dyn_relocs *p;
5917 struct elf_dyn_relocs **head;
5918
5919 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
5920 p = *head;
5921 if (p == NULL || p->sec != sec)
5922 {
5923 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5924 if (p == NULL)
5925 return FALSE;
5926 p->next = *head;
5927 *head = p;
5928 p->sec = sec;
5929 p->count = 0;
5930 p->pc_count = 0;
5931 }
5932 p->count += 1;
5933 if (!must_be_dyn_reloc (info, r_type))
5934 p->pc_count += 1;
5935 }
5936 else
5937 {
5938 /* Track dynamic relocs needed for local syms too.
5939 We really need local syms available to do this
5940 easily. Oh well. */
5941 struct ppc_dyn_relocs *p;
5942 struct ppc_dyn_relocs **head;
5943 bfd_boolean is_ifunc;
5944 asection *s;
5945 void *vpp;
5946 Elf_Internal_Sym *isym;
5947
5948 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5949 abfd, r_symndx);
5950 if (isym == NULL)
5951 return FALSE;
5952
5953 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5954 if (s == NULL)
5955 s = sec;
5956
5957 vpp = &elf_section_data (s)->local_dynrel;
5958 head = (struct ppc_dyn_relocs **) vpp;
5959 is_ifunc = ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC;
5960 p = *head;
5961 if (p != NULL && p->sec == sec && p->ifunc != is_ifunc)
5962 p = p->next;
5963 if (p == NULL || p->sec != sec || p->ifunc != is_ifunc)
5964 {
5965 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5966 if (p == NULL)
5967 return FALSE;
5968 p->next = *head;
5969 *head = p;
5970 p->sec = sec;
5971 p->ifunc = is_ifunc;
5972 p->count = 0;
5973 }
5974 p->count += 1;
5975 }
5976 }
5977 break;
5978
5979 default:
5980 break;
5981 }
5982 }
5983
5984 return TRUE;
5985 }
5986
5987 /* Merge backend specific data from an object file to the output
5988 object file when linking. */
5989
5990 static bfd_boolean
5991 ppc64_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
5992 {
5993 unsigned long iflags, oflags;
5994
5995 if ((ibfd->flags & BFD_LINKER_CREATED) != 0)
5996 return TRUE;
5997
5998 if (!is_ppc64_elf (ibfd) || !is_ppc64_elf (obfd))
5999 return TRUE;
6000
6001 if (!_bfd_generic_verify_endian_match (ibfd, obfd))
6002 return FALSE;
6003
6004 iflags = elf_elfheader (ibfd)->e_flags;
6005 oflags = elf_elfheader (obfd)->e_flags;
6006
6007 if (iflags & ~EF_PPC64_ABI)
6008 {
6009 (*_bfd_error_handler)
6010 (_("%B uses unknown e_flags 0x%lx"), ibfd, iflags);
6011 bfd_set_error (bfd_error_bad_value);
6012 return FALSE;
6013 }
6014 else if (iflags != oflags && iflags != 0)
6015 {
6016 (*_bfd_error_handler)
6017 (_("%B: ABI version %ld is not compatible with ABI version %ld output"),
6018 ibfd, iflags, oflags);
6019 bfd_set_error (bfd_error_bad_value);
6020 return FALSE;
6021 }
6022
6023 /* Merge Tag_compatibility attributes and any common GNU ones. */
6024 _bfd_elf_merge_object_attributes (ibfd, obfd);
6025
6026 return TRUE;
6027 }
6028
6029 static bfd_boolean
6030 ppc64_elf_print_private_bfd_data (bfd *abfd, void *ptr)
6031 {
6032 /* Print normal ELF private data. */
6033 _bfd_elf_print_private_bfd_data (abfd, ptr);
6034
6035 if (elf_elfheader (abfd)->e_flags != 0)
6036 {
6037 FILE *file = ptr;
6038
6039 /* xgettext:c-format */
6040 fprintf (file, _("private flags = 0x%lx:"),
6041 elf_elfheader (abfd)->e_flags);
6042
6043 if ((elf_elfheader (abfd)->e_flags & EF_PPC64_ABI) != 0)
6044 fprintf (file, _(" [abiv%ld]"),
6045 elf_elfheader (abfd)->e_flags & EF_PPC64_ABI);
6046 fputc ('\n', file);
6047 }
6048
6049 return TRUE;
6050 }
6051
6052 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
6053 of the code entry point, and its section, which must be in the same
6054 object as OPD_SEC. Returns (bfd_vma) -1 on error. */
6055
6056 static bfd_vma
6057 opd_entry_value (asection *opd_sec,
6058 bfd_vma offset,
6059 asection **code_sec,
6060 bfd_vma *code_off,
6061 bfd_boolean in_code_sec)
6062 {
6063 bfd *opd_bfd = opd_sec->owner;
6064 Elf_Internal_Rela *relocs;
6065 Elf_Internal_Rela *lo, *hi, *look;
6066 bfd_vma val;
6067
6068 /* No relocs implies we are linking a --just-symbols object, or looking
6069 at a final linked executable with addr2line or somesuch. */
6070 if (opd_sec->reloc_count == 0)
6071 {
6072 bfd_byte *contents = ppc64_elf_tdata (opd_bfd)->opd.contents;
6073
6074 if (contents == NULL)
6075 {
6076 if (!bfd_malloc_and_get_section (opd_bfd, opd_sec, &contents))
6077 return (bfd_vma) -1;
6078 ppc64_elf_tdata (opd_bfd)->opd.contents = contents;
6079 }
6080
6081 /* PR 17512: file: 64b9dfbb. */
6082 if (offset + 7 >= opd_sec->size || offset + 7 < offset)
6083 return (bfd_vma) -1;
6084
6085 val = bfd_get_64 (opd_bfd, contents + offset);
6086 if (code_sec != NULL)
6087 {
6088 asection *sec, *likely = NULL;
6089
6090 if (in_code_sec)
6091 {
6092 sec = *code_sec;
6093 if (sec->vma <= val
6094 && val < sec->vma + sec->size)
6095 likely = sec;
6096 else
6097 val = -1;
6098 }
6099 else
6100 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
6101 if (sec->vma <= val
6102 && (sec->flags & SEC_LOAD) != 0
6103 && (sec->flags & SEC_ALLOC) != 0)
6104 likely = sec;
6105 if (likely != NULL)
6106 {
6107 *code_sec = likely;
6108 if (code_off != NULL)
6109 *code_off = val - likely->vma;
6110 }
6111 }
6112 return val;
6113 }
6114
6115 BFD_ASSERT (is_ppc64_elf (opd_bfd));
6116
6117 relocs = ppc64_elf_tdata (opd_bfd)->opd.relocs;
6118 if (relocs == NULL)
6119 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
6120 /* PR 17512: file: df8e1fd6. */
6121 if (relocs == NULL)
6122 return (bfd_vma) -1;
6123
6124 /* Go find the opd reloc at the sym address. */
6125 lo = relocs;
6126 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
6127 val = (bfd_vma) -1;
6128 while (lo < hi)
6129 {
6130 look = lo + (hi - lo) / 2;
6131 if (look->r_offset < offset)
6132 lo = look + 1;
6133 else if (look->r_offset > offset)
6134 hi = look;
6135 else
6136 {
6137 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (opd_bfd);
6138
6139 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
6140 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
6141 {
6142 unsigned long symndx = ELF64_R_SYM (look->r_info);
6143 asection *sec = NULL;
6144
6145 if (symndx >= symtab_hdr->sh_info
6146 && elf_sym_hashes (opd_bfd) != NULL)
6147 {
6148 struct elf_link_hash_entry **sym_hashes;
6149 struct elf_link_hash_entry *rh;
6150
6151 sym_hashes = elf_sym_hashes (opd_bfd);
6152 rh = sym_hashes[symndx - symtab_hdr->sh_info];
6153 if (rh != NULL)
6154 {
6155 rh = elf_follow_link (rh);
6156 if (rh->root.type != bfd_link_hash_defined
6157 && rh->root.type != bfd_link_hash_defweak)
6158 break;
6159 if (rh->root.u.def.section->owner == opd_bfd)
6160 {
6161 val = rh->root.u.def.value;
6162 sec = rh->root.u.def.section;
6163 }
6164 }
6165 }
6166
6167 if (sec == NULL)
6168 {
6169 Elf_Internal_Sym *sym;
6170
6171 if (symndx < symtab_hdr->sh_info)
6172 {
6173 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
6174 if (sym == NULL)
6175 {
6176 size_t symcnt = symtab_hdr->sh_info;
6177 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
6178 symcnt, 0,
6179 NULL, NULL, NULL);
6180 if (sym == NULL)
6181 break;
6182 symtab_hdr->contents = (bfd_byte *) sym;
6183 }
6184 sym += symndx;
6185 }
6186 else
6187 {
6188 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
6189 1, symndx,
6190 NULL, NULL, NULL);
6191 if (sym == NULL)
6192 break;
6193 }
6194 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
6195 if (sec == NULL)
6196 break;
6197 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
6198 val = sym->st_value;
6199 }
6200
6201 val += look->r_addend;
6202 if (code_off != NULL)
6203 *code_off = val;
6204 if (code_sec != NULL)
6205 {
6206 if (in_code_sec && *code_sec != sec)
6207 return -1;
6208 else
6209 *code_sec = sec;
6210 }
6211 if (sec->output_section != NULL)
6212 val += sec->output_section->vma + sec->output_offset;
6213 }
6214 break;
6215 }
6216 }
6217
6218 return val;
6219 }
6220
6221 /* If the ELF symbol SYM might be a function in SEC, return the
6222 function size and set *CODE_OFF to the function's entry point,
6223 otherwise return zero. */
6224
6225 static bfd_size_type
6226 ppc64_elf_maybe_function_sym (const asymbol *sym, asection *sec,
6227 bfd_vma *code_off)
6228 {
6229 bfd_size_type size;
6230
6231 if ((sym->flags & (BSF_SECTION_SYM | BSF_FILE | BSF_OBJECT
6232 | BSF_THREAD_LOCAL | BSF_RELC | BSF_SRELC)) != 0)
6233 return 0;
6234
6235 size = 0;
6236 if (!(sym->flags & BSF_SYNTHETIC))
6237 size = ((elf_symbol_type *) sym)->internal_elf_sym.st_size;
6238
6239 if (strcmp (sym->section->name, ".opd") == 0)
6240 {
6241 struct _opd_sec_data *opd = get_opd_info (sym->section);
6242 bfd_vma symval = sym->value;
6243
6244 if (opd != NULL
6245 && opd->adjust != NULL
6246 && elf_section_data (sym->section)->relocs != NULL)
6247 {
6248 /* opd_entry_value will use cached relocs that have been
6249 adjusted, but with raw symbols. That means both local
6250 and global symbols need adjusting. */
6251 long adjust = opd->adjust[OPD_NDX (symval)];
6252 if (adjust == -1)
6253 return 0;
6254 symval += adjust;
6255 }
6256
6257 if (opd_entry_value (sym->section, symval,
6258 &sec, code_off, TRUE) == (bfd_vma) -1)
6259 return 0;
6260 /* An old ABI binary with dot-syms has a size of 24 on the .opd
6261 symbol. This size has nothing to do with the code size of the
6262 function, which is what we're supposed to return, but the
6263 code size isn't available without looking up the dot-sym.
6264 However, doing that would be a waste of time particularly
6265 since elf_find_function will look at the dot-sym anyway.
6266 Now, elf_find_function will keep the largest size of any
6267 function sym found at the code address of interest, so return
6268 1 here to avoid it incorrectly caching a larger function size
6269 for a small function. This does mean we return the wrong
6270 size for a new-ABI function of size 24, but all that does is
6271 disable caching for such functions. */
6272 if (size == 24)
6273 size = 1;
6274 }
6275 else
6276 {
6277 if (sym->section != sec)
6278 return 0;
6279 *code_off = sym->value;
6280 }
6281 if (size == 0)
6282 size = 1;
6283 return size;
6284 }
6285
6286 /* Return true if symbol is defined in a regular object file. */
6287
6288 static bfd_boolean
6289 is_static_defined (struct elf_link_hash_entry *h)
6290 {
6291 return ((h->root.type == bfd_link_hash_defined
6292 || h->root.type == bfd_link_hash_defweak)
6293 && h->root.u.def.section != NULL
6294 && h->root.u.def.section->output_section != NULL);
6295 }
6296
6297 /* If FDH is a function descriptor symbol, return the associated code
6298 entry symbol if it is defined. Return NULL otherwise. */
6299
6300 static struct ppc_link_hash_entry *
6301 defined_code_entry (struct ppc_link_hash_entry *fdh)
6302 {
6303 if (fdh->is_func_descriptor)
6304 {
6305 struct ppc_link_hash_entry *fh = ppc_follow_link (fdh->oh);
6306 if (fh->elf.root.type == bfd_link_hash_defined
6307 || fh->elf.root.type == bfd_link_hash_defweak)
6308 return fh;
6309 }
6310 return NULL;
6311 }
6312
6313 /* If FH is a function code entry symbol, return the associated
6314 function descriptor symbol if it is defined. Return NULL otherwise. */
6315
6316 static struct ppc_link_hash_entry *
6317 defined_func_desc (struct ppc_link_hash_entry *fh)
6318 {
6319 if (fh->oh != NULL
6320 && fh->oh->is_func_descriptor)
6321 {
6322 struct ppc_link_hash_entry *fdh = ppc_follow_link (fh->oh);
6323 if (fdh->elf.root.type == bfd_link_hash_defined
6324 || fdh->elf.root.type == bfd_link_hash_defweak)
6325 return fdh;
6326 }
6327 return NULL;
6328 }
6329
6330 /* Mark all our entry sym sections, both opd and code section. */
6331
6332 static void
6333 ppc64_elf_gc_keep (struct bfd_link_info *info)
6334 {
6335 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6336 struct bfd_sym_chain *sym;
6337
6338 if (htab == NULL)
6339 return;
6340
6341 for (sym = info->gc_sym_list; sym != NULL; sym = sym->next)
6342 {
6343 struct ppc_link_hash_entry *eh, *fh;
6344 asection *sec;
6345
6346 eh = (struct ppc_link_hash_entry *)
6347 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, TRUE);
6348 if (eh == NULL)
6349 continue;
6350 if (eh->elf.root.type != bfd_link_hash_defined
6351 && eh->elf.root.type != bfd_link_hash_defweak)
6352 continue;
6353
6354 fh = defined_code_entry (eh);
6355 if (fh != NULL)
6356 {
6357 sec = fh->elf.root.u.def.section;
6358 sec->flags |= SEC_KEEP;
6359 }
6360 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6361 && opd_entry_value (eh->elf.root.u.def.section,
6362 eh->elf.root.u.def.value,
6363 &sec, NULL, FALSE) != (bfd_vma) -1)
6364 sec->flags |= SEC_KEEP;
6365
6366 sec = eh->elf.root.u.def.section;
6367 sec->flags |= SEC_KEEP;
6368 }
6369 }
6370
6371 /* Mark sections containing dynamically referenced symbols. When
6372 building shared libraries, we must assume that any visible symbol is
6373 referenced. */
6374
6375 static bfd_boolean
6376 ppc64_elf_gc_mark_dynamic_ref (struct elf_link_hash_entry *h, void *inf)
6377 {
6378 struct bfd_link_info *info = (struct bfd_link_info *) inf;
6379 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
6380 struct ppc_link_hash_entry *fdh;
6381 struct bfd_elf_dynamic_list *d = info->dynamic_list;
6382
6383 /* Dynamic linking info is on the func descriptor sym. */
6384 fdh = defined_func_desc (eh);
6385 if (fdh != NULL)
6386 eh = fdh;
6387
6388 if ((eh->elf.root.type == bfd_link_hash_defined
6389 || eh->elf.root.type == bfd_link_hash_defweak)
6390 && (eh->elf.ref_dynamic
6391 || ((eh->elf.def_regular || ELF_COMMON_DEF_P (&eh->elf))
6392 && ELF_ST_VISIBILITY (eh->elf.other) != STV_INTERNAL
6393 && ELF_ST_VISIBILITY (eh->elf.other) != STV_HIDDEN
6394 && (!bfd_link_executable (info)
6395 || info->export_dynamic
6396 || (eh->elf.dynamic
6397 && d != NULL
6398 && (*d->match) (&d->head, NULL, eh->elf.root.root.string)))
6399 && (strchr (eh->elf.root.root.string, ELF_VER_CHR) != NULL
6400 || !bfd_hide_sym_by_version (info->version_info,
6401 eh->elf.root.root.string)))))
6402 {
6403 asection *code_sec;
6404 struct ppc_link_hash_entry *fh;
6405
6406 eh->elf.root.u.def.section->flags |= SEC_KEEP;
6407
6408 /* Function descriptor syms cause the associated
6409 function code sym section to be marked. */
6410 fh = defined_code_entry (eh);
6411 if (fh != NULL)
6412 {
6413 code_sec = fh->elf.root.u.def.section;
6414 code_sec->flags |= SEC_KEEP;
6415 }
6416 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6417 && opd_entry_value (eh->elf.root.u.def.section,
6418 eh->elf.root.u.def.value,
6419 &code_sec, NULL, FALSE) != (bfd_vma) -1)
6420 code_sec->flags |= SEC_KEEP;
6421 }
6422
6423 return TRUE;
6424 }
6425
6426 /* Return the section that should be marked against GC for a given
6427 relocation. */
6428
6429 static asection *
6430 ppc64_elf_gc_mark_hook (asection *sec,
6431 struct bfd_link_info *info,
6432 Elf_Internal_Rela *rel,
6433 struct elf_link_hash_entry *h,
6434 Elf_Internal_Sym *sym)
6435 {
6436 asection *rsec;
6437
6438 /* Syms return NULL if we're marking .opd, so we avoid marking all
6439 function sections, as all functions are referenced in .opd. */
6440 rsec = NULL;
6441 if (get_opd_info (sec) != NULL)
6442 return rsec;
6443
6444 if (h != NULL)
6445 {
6446 enum elf_ppc64_reloc_type r_type;
6447 struct ppc_link_hash_entry *eh, *fh, *fdh;
6448
6449 r_type = ELF64_R_TYPE (rel->r_info);
6450 switch (r_type)
6451 {
6452 case R_PPC64_GNU_VTINHERIT:
6453 case R_PPC64_GNU_VTENTRY:
6454 break;
6455
6456 default:
6457 switch (h->root.type)
6458 {
6459 case bfd_link_hash_defined:
6460 case bfd_link_hash_defweak:
6461 eh = (struct ppc_link_hash_entry *) h;
6462 fdh = defined_func_desc (eh);
6463 if (fdh != NULL)
6464 eh = fdh;
6465
6466 /* Function descriptor syms cause the associated
6467 function code sym section to be marked. */
6468 fh = defined_code_entry (eh);
6469 if (fh != NULL)
6470 {
6471 /* They also mark their opd section. */
6472 eh->elf.root.u.def.section->gc_mark = 1;
6473
6474 rsec = fh->elf.root.u.def.section;
6475 }
6476 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6477 && opd_entry_value (eh->elf.root.u.def.section,
6478 eh->elf.root.u.def.value,
6479 &rsec, NULL, FALSE) != (bfd_vma) -1)
6480 eh->elf.root.u.def.section->gc_mark = 1;
6481 else
6482 rsec = h->root.u.def.section;
6483 break;
6484
6485 case bfd_link_hash_common:
6486 rsec = h->root.u.c.p->section;
6487 break;
6488
6489 default:
6490 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
6491 }
6492 }
6493 }
6494 else
6495 {
6496 struct _opd_sec_data *opd;
6497
6498 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
6499 opd = get_opd_info (rsec);
6500 if (opd != NULL && opd->func_sec != NULL)
6501 {
6502 rsec->gc_mark = 1;
6503
6504 rsec = opd->func_sec[OPD_NDX (sym->st_value + rel->r_addend)];
6505 }
6506 }
6507
6508 return rsec;
6509 }
6510
6511 /* Update the .got, .plt. and dynamic reloc reference counts for the
6512 section being removed. */
6513
6514 static bfd_boolean
6515 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
6516 asection *sec, const Elf_Internal_Rela *relocs)
6517 {
6518 struct ppc_link_hash_table *htab;
6519 Elf_Internal_Shdr *symtab_hdr;
6520 struct elf_link_hash_entry **sym_hashes;
6521 struct got_entry **local_got_ents;
6522 const Elf_Internal_Rela *rel, *relend;
6523
6524 if (bfd_link_relocatable (info))
6525 return TRUE;
6526
6527 if ((sec->flags & SEC_ALLOC) == 0)
6528 return TRUE;
6529
6530 elf_section_data (sec)->local_dynrel = NULL;
6531
6532 htab = ppc_hash_table (info);
6533 if (htab == NULL)
6534 return FALSE;
6535
6536 symtab_hdr = &elf_symtab_hdr (abfd);
6537 sym_hashes = elf_sym_hashes (abfd);
6538 local_got_ents = elf_local_got_ents (abfd);
6539
6540 relend = relocs + sec->reloc_count;
6541 for (rel = relocs; rel < relend; rel++)
6542 {
6543 unsigned long r_symndx;
6544 enum elf_ppc64_reloc_type r_type;
6545 struct elf_link_hash_entry *h = NULL;
6546 struct plt_entry **plt_list;
6547 unsigned char tls_type = 0;
6548
6549 r_symndx = ELF64_R_SYM (rel->r_info);
6550 r_type = ELF64_R_TYPE (rel->r_info);
6551 if (r_symndx >= symtab_hdr->sh_info)
6552 {
6553 struct ppc_link_hash_entry *eh;
6554 struct elf_dyn_relocs **pp;
6555 struct elf_dyn_relocs *p;
6556
6557 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
6558 h = elf_follow_link (h);
6559 eh = (struct ppc_link_hash_entry *) h;
6560
6561 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
6562 if (p->sec == sec)
6563 {
6564 /* Everything must go for SEC. */
6565 *pp = p->next;
6566 break;
6567 }
6568 }
6569
6570 switch (r_type)
6571 {
6572 case R_PPC64_GOT_TLSLD16:
6573 case R_PPC64_GOT_TLSLD16_LO:
6574 case R_PPC64_GOT_TLSLD16_HI:
6575 case R_PPC64_GOT_TLSLD16_HA:
6576 tls_type = TLS_TLS | TLS_LD;
6577 goto dogot;
6578
6579 case R_PPC64_GOT_TLSGD16:
6580 case R_PPC64_GOT_TLSGD16_LO:
6581 case R_PPC64_GOT_TLSGD16_HI:
6582 case R_PPC64_GOT_TLSGD16_HA:
6583 tls_type = TLS_TLS | TLS_GD;
6584 goto dogot;
6585
6586 case R_PPC64_GOT_TPREL16_DS:
6587 case R_PPC64_GOT_TPREL16_LO_DS:
6588 case R_PPC64_GOT_TPREL16_HI:
6589 case R_PPC64_GOT_TPREL16_HA:
6590 tls_type = TLS_TLS | TLS_TPREL;
6591 goto dogot;
6592
6593 case R_PPC64_GOT_DTPREL16_DS:
6594 case R_PPC64_GOT_DTPREL16_LO_DS:
6595 case R_PPC64_GOT_DTPREL16_HI:
6596 case R_PPC64_GOT_DTPREL16_HA:
6597 tls_type = TLS_TLS | TLS_DTPREL;
6598 goto dogot;
6599
6600 case R_PPC64_GOT16:
6601 case R_PPC64_GOT16_DS:
6602 case R_PPC64_GOT16_HA:
6603 case R_PPC64_GOT16_HI:
6604 case R_PPC64_GOT16_LO:
6605 case R_PPC64_GOT16_LO_DS:
6606 dogot:
6607 {
6608 struct got_entry *ent;
6609
6610 if (h != NULL)
6611 ent = h->got.glist;
6612 else
6613 ent = local_got_ents[r_symndx];
6614
6615 for (; ent != NULL; ent = ent->next)
6616 if (ent->addend == rel->r_addend
6617 && ent->owner == abfd
6618 && ent->tls_type == tls_type)
6619 break;
6620 if (ent == NULL)
6621 abort ();
6622 if (ent->got.refcount > 0)
6623 ent->got.refcount -= 1;
6624 }
6625 break;
6626
6627 case R_PPC64_PLT16_HA:
6628 case R_PPC64_PLT16_HI:
6629 case R_PPC64_PLT16_LO:
6630 case R_PPC64_PLT32:
6631 case R_PPC64_PLT64:
6632 case R_PPC64_REL14:
6633 case R_PPC64_REL14_BRNTAKEN:
6634 case R_PPC64_REL14_BRTAKEN:
6635 case R_PPC64_REL24:
6636 plt_list = NULL;
6637 if (h != NULL)
6638 plt_list = &h->plt.plist;
6639 else if (local_got_ents != NULL)
6640 {
6641 struct plt_entry **local_plt = (struct plt_entry **)
6642 (local_got_ents + symtab_hdr->sh_info);
6643 unsigned char *local_got_tls_masks = (unsigned char *)
6644 (local_plt + symtab_hdr->sh_info);
6645 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
6646 plt_list = local_plt + r_symndx;
6647 }
6648 if (plt_list)
6649 {
6650 struct plt_entry *ent;
6651
6652 for (ent = *plt_list; ent != NULL; ent = ent->next)
6653 if (ent->addend == rel->r_addend)
6654 break;
6655 if (ent != NULL && ent->plt.refcount > 0)
6656 ent->plt.refcount -= 1;
6657 }
6658 break;
6659
6660 default:
6661 break;
6662 }
6663 }
6664 return TRUE;
6665 }
6666
6667 /* The maximum size of .sfpr. */
6668 #define SFPR_MAX (218*4)
6669
6670 struct sfpr_def_parms
6671 {
6672 const char name[12];
6673 unsigned char lo, hi;
6674 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
6675 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
6676 };
6677
6678 /* Auto-generate _save*, _rest* functions in .sfpr.
6679 If STUB_SEC is non-null, define alias symbols in STUB_SEC
6680 instead. */
6681
6682 static bfd_boolean
6683 sfpr_define (struct bfd_link_info *info,
6684 const struct sfpr_def_parms *parm,
6685 asection *stub_sec)
6686 {
6687 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6688 unsigned int i;
6689 size_t len = strlen (parm->name);
6690 bfd_boolean writing = FALSE;
6691 char sym[16];
6692
6693 if (htab == NULL)
6694 return FALSE;
6695
6696 memcpy (sym, parm->name, len);
6697 sym[len + 2] = 0;
6698
6699 for (i = parm->lo; i <= parm->hi; i++)
6700 {
6701 struct ppc_link_hash_entry *h;
6702
6703 sym[len + 0] = i / 10 + '0';
6704 sym[len + 1] = i % 10 + '0';
6705 h = (struct ppc_link_hash_entry *)
6706 elf_link_hash_lookup (&htab->elf, sym, writing, TRUE, TRUE);
6707 if (stub_sec != NULL)
6708 {
6709 if (h != NULL
6710 && h->elf.root.type == bfd_link_hash_defined
6711 && h->elf.root.u.def.section == htab->sfpr)
6712 {
6713 struct elf_link_hash_entry *s;
6714 char buf[32];
6715 sprintf (buf, "%08x.%s", stub_sec->id & 0xffffffff, sym);
6716 s = elf_link_hash_lookup (&htab->elf, buf, TRUE, TRUE, FALSE);
6717 if (s == NULL)
6718 return FALSE;
6719 if (s->root.type == bfd_link_hash_new
6720 || (s->root.type = bfd_link_hash_defined
6721 && s->root.u.def.section == stub_sec))
6722 {
6723 s->root.type = bfd_link_hash_defined;
6724 s->root.u.def.section = stub_sec;
6725 s->root.u.def.value = (stub_sec->size
6726 + h->elf.root.u.def.value);
6727 s->ref_regular = 1;
6728 s->def_regular = 1;
6729 s->ref_regular_nonweak = 1;
6730 s->forced_local = 1;
6731 s->non_elf = 0;
6732 s->root.linker_def = 1;
6733 }
6734 }
6735 continue;
6736 }
6737 if (h != NULL)
6738 {
6739 h->save_res = 1;
6740 if (!h->elf.def_regular)
6741 {
6742 h->elf.root.type = bfd_link_hash_defined;
6743 h->elf.root.u.def.section = htab->sfpr;
6744 h->elf.root.u.def.value = htab->sfpr->size;
6745 h->elf.type = STT_FUNC;
6746 h->elf.def_regular = 1;
6747 h->elf.non_elf = 0;
6748 _bfd_elf_link_hash_hide_symbol (info, &h->elf, TRUE);
6749 writing = TRUE;
6750 if (htab->sfpr->contents == NULL)
6751 {
6752 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
6753 if (htab->sfpr->contents == NULL)
6754 return FALSE;
6755 }
6756 }
6757 }
6758 if (writing)
6759 {
6760 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
6761 if (i != parm->hi)
6762 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
6763 else
6764 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
6765 htab->sfpr->size = p - htab->sfpr->contents;
6766 }
6767 }
6768
6769 return TRUE;
6770 }
6771
6772 static bfd_byte *
6773 savegpr0 (bfd *abfd, bfd_byte *p, int r)
6774 {
6775 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6776 return p + 4;
6777 }
6778
6779 static bfd_byte *
6780 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
6781 {
6782 p = savegpr0 (abfd, p, r);
6783 bfd_put_32 (abfd, STD_R0_0R1 + STK_LR, p);
6784 p = p + 4;
6785 bfd_put_32 (abfd, BLR, p);
6786 return p + 4;
6787 }
6788
6789 static bfd_byte *
6790 restgpr0 (bfd *abfd, bfd_byte *p, int r)
6791 {
6792 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6793 return p + 4;
6794 }
6795
6796 static bfd_byte *
6797 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
6798 {
6799 bfd_put_32 (abfd, LD_R0_0R1 + STK_LR, p);
6800 p = p + 4;
6801 p = restgpr0 (abfd, p, r);
6802 bfd_put_32 (abfd, MTLR_R0, p);
6803 p = p + 4;
6804 if (r == 29)
6805 {
6806 p = restgpr0 (abfd, p, 30);
6807 p = restgpr0 (abfd, p, 31);
6808 }
6809 bfd_put_32 (abfd, BLR, p);
6810 return p + 4;
6811 }
6812
6813 static bfd_byte *
6814 savegpr1 (bfd *abfd, bfd_byte *p, int r)
6815 {
6816 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6817 return p + 4;
6818 }
6819
6820 static bfd_byte *
6821 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
6822 {
6823 p = savegpr1 (abfd, p, r);
6824 bfd_put_32 (abfd, BLR, p);
6825 return p + 4;
6826 }
6827
6828 static bfd_byte *
6829 restgpr1 (bfd *abfd, bfd_byte *p, int r)
6830 {
6831 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6832 return p + 4;
6833 }
6834
6835 static bfd_byte *
6836 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
6837 {
6838 p = restgpr1 (abfd, p, r);
6839 bfd_put_32 (abfd, BLR, p);
6840 return p + 4;
6841 }
6842
6843 static bfd_byte *
6844 savefpr (bfd *abfd, bfd_byte *p, int r)
6845 {
6846 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6847 return p + 4;
6848 }
6849
6850 static bfd_byte *
6851 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
6852 {
6853 p = savefpr (abfd, p, r);
6854 bfd_put_32 (abfd, STD_R0_0R1 + STK_LR, p);
6855 p = p + 4;
6856 bfd_put_32 (abfd, BLR, p);
6857 return p + 4;
6858 }
6859
6860 static bfd_byte *
6861 restfpr (bfd *abfd, bfd_byte *p, int r)
6862 {
6863 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6864 return p + 4;
6865 }
6866
6867 static bfd_byte *
6868 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
6869 {
6870 bfd_put_32 (abfd, LD_R0_0R1 + STK_LR, p);
6871 p = p + 4;
6872 p = restfpr (abfd, p, r);
6873 bfd_put_32 (abfd, MTLR_R0, p);
6874 p = p + 4;
6875 if (r == 29)
6876 {
6877 p = restfpr (abfd, p, 30);
6878 p = restfpr (abfd, p, 31);
6879 }
6880 bfd_put_32 (abfd, BLR, p);
6881 return p + 4;
6882 }
6883
6884 static bfd_byte *
6885 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
6886 {
6887 p = savefpr (abfd, p, r);
6888 bfd_put_32 (abfd, BLR, p);
6889 return p + 4;
6890 }
6891
6892 static bfd_byte *
6893 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
6894 {
6895 p = restfpr (abfd, p, r);
6896 bfd_put_32 (abfd, BLR, p);
6897 return p + 4;
6898 }
6899
6900 static bfd_byte *
6901 savevr (bfd *abfd, bfd_byte *p, int r)
6902 {
6903 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6904 p = p + 4;
6905 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
6906 return p + 4;
6907 }
6908
6909 static bfd_byte *
6910 savevr_tail (bfd *abfd, bfd_byte *p, int r)
6911 {
6912 p = savevr (abfd, p, r);
6913 bfd_put_32 (abfd, BLR, p);
6914 return p + 4;
6915 }
6916
6917 static bfd_byte *
6918 restvr (bfd *abfd, bfd_byte *p, int r)
6919 {
6920 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6921 p = p + 4;
6922 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
6923 return p + 4;
6924 }
6925
6926 static bfd_byte *
6927 restvr_tail (bfd *abfd, bfd_byte *p, int r)
6928 {
6929 p = restvr (abfd, p, r);
6930 bfd_put_32 (abfd, BLR, p);
6931 return p + 4;
6932 }
6933
6934 /* Called via elf_link_hash_traverse to transfer dynamic linking
6935 information on function code symbol entries to their corresponding
6936 function descriptor symbol entries. */
6937
6938 static bfd_boolean
6939 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
6940 {
6941 struct bfd_link_info *info;
6942 struct ppc_link_hash_table *htab;
6943 struct plt_entry *ent;
6944 struct ppc_link_hash_entry *fh;
6945 struct ppc_link_hash_entry *fdh;
6946 bfd_boolean force_local;
6947
6948 fh = (struct ppc_link_hash_entry *) h;
6949 if (fh->elf.root.type == bfd_link_hash_indirect)
6950 return TRUE;
6951
6952 info = inf;
6953 htab = ppc_hash_table (info);
6954 if (htab == NULL)
6955 return FALSE;
6956
6957 /* Resolve undefined references to dot-symbols as the value
6958 in the function descriptor, if we have one in a regular object.
6959 This is to satisfy cases like ".quad .foo". Calls to functions
6960 in dynamic objects are handled elsewhere. */
6961 if (fh->elf.root.type == bfd_link_hash_undefweak
6962 && fh->was_undefined
6963 && (fdh = defined_func_desc (fh)) != NULL
6964 && get_opd_info (fdh->elf.root.u.def.section) != NULL
6965 && opd_entry_value (fdh->elf.root.u.def.section,
6966 fdh->elf.root.u.def.value,
6967 &fh->elf.root.u.def.section,
6968 &fh->elf.root.u.def.value, FALSE) != (bfd_vma) -1)
6969 {
6970 fh->elf.root.type = fdh->elf.root.type;
6971 fh->elf.forced_local = 1;
6972 fh->elf.def_regular = fdh->elf.def_regular;
6973 fh->elf.def_dynamic = fdh->elf.def_dynamic;
6974 }
6975
6976 /* If this is a function code symbol, transfer dynamic linking
6977 information to the function descriptor symbol. */
6978 if (!fh->is_func)
6979 return TRUE;
6980
6981 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
6982 if (ent->plt.refcount > 0)
6983 break;
6984 if (ent == NULL
6985 || fh->elf.root.root.string[0] != '.'
6986 || fh->elf.root.root.string[1] == '\0')
6987 return TRUE;
6988
6989 /* Find the corresponding function descriptor symbol. Create it
6990 as undefined if necessary. */
6991
6992 fdh = lookup_fdh (fh, htab);
6993 if (fdh == NULL
6994 && !bfd_link_executable (info)
6995 && (fh->elf.root.type == bfd_link_hash_undefined
6996 || fh->elf.root.type == bfd_link_hash_undefweak))
6997 {
6998 fdh = make_fdh (info, fh);
6999 if (fdh == NULL)
7000 return FALSE;
7001 }
7002
7003 /* Fake function descriptors are made undefweak. If the function
7004 code symbol is strong undefined, make the fake sym the same.
7005 If the function code symbol is defined, then force the fake
7006 descriptor local; We can't support overriding of symbols in a
7007 shared library on a fake descriptor. */
7008
7009 if (fdh != NULL
7010 && fdh->fake
7011 && fdh->elf.root.type == bfd_link_hash_undefweak)
7012 {
7013 if (fh->elf.root.type == bfd_link_hash_undefined)
7014 {
7015 fdh->elf.root.type = bfd_link_hash_undefined;
7016 bfd_link_add_undef (&htab->elf.root, &fdh->elf.root);
7017 }
7018 else if (fh->elf.root.type == bfd_link_hash_defined
7019 || fh->elf.root.type == bfd_link_hash_defweak)
7020 {
7021 _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE);
7022 }
7023 }
7024
7025 if (fdh != NULL
7026 && !fdh->elf.forced_local
7027 && (!bfd_link_executable (info)
7028 || fdh->elf.def_dynamic
7029 || fdh->elf.ref_dynamic
7030 || (fdh->elf.root.type == bfd_link_hash_undefweak
7031 && ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT)))
7032 {
7033 if (fdh->elf.dynindx == -1)
7034 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
7035 return FALSE;
7036 fdh->elf.ref_regular |= fh->elf.ref_regular;
7037 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
7038 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
7039 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
7040 if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT)
7041 {
7042 move_plt_plist (fh, fdh);
7043 fdh->elf.needs_plt = 1;
7044 }
7045 fdh->is_func_descriptor = 1;
7046 fdh->oh = fh;
7047 fh->oh = fdh;
7048 }
7049
7050 /* Now that the info is on the function descriptor, clear the
7051 function code sym info. Any function code syms for which we
7052 don't have a definition in a regular file, we force local.
7053 This prevents a shared library from exporting syms that have
7054 been imported from another library. Function code syms that
7055 are really in the library we must leave global to prevent the
7056 linker dragging in a definition from a static library. */
7057 force_local = (!fh->elf.def_regular
7058 || fdh == NULL
7059 || !fdh->elf.def_regular
7060 || fdh->elf.forced_local);
7061 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
7062
7063 return TRUE;
7064 }
7065
7066 static const struct sfpr_def_parms save_res_funcs[] =
7067 {
7068 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
7069 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
7070 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
7071 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
7072 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
7073 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
7074 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
7075 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
7076 { "._savef", 14, 31, savefpr, savefpr1_tail },
7077 { "._restf", 14, 31, restfpr, restfpr1_tail },
7078 { "_savevr_", 20, 31, savevr, savevr_tail },
7079 { "_restvr_", 20, 31, restvr, restvr_tail }
7080 };
7081
7082 /* Called near the start of bfd_elf_size_dynamic_sections. We use
7083 this hook to a) provide some gcc support functions, and b) transfer
7084 dynamic linking information gathered so far on function code symbol
7085 entries, to their corresponding function descriptor symbol entries. */
7086
7087 static bfd_boolean
7088 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
7089 struct bfd_link_info *info)
7090 {
7091 struct ppc_link_hash_table *htab;
7092
7093 htab = ppc_hash_table (info);
7094 if (htab == NULL)
7095 return FALSE;
7096
7097 /* Provide any missing _save* and _rest* functions. */
7098 if (htab->sfpr != NULL)
7099 {
7100 unsigned int i;
7101
7102 htab->sfpr->size = 0;
7103 for (i = 0; i < ARRAY_SIZE (save_res_funcs); i++)
7104 if (!sfpr_define (info, &save_res_funcs[i], NULL))
7105 return FALSE;
7106 if (htab->sfpr->size == 0)
7107 htab->sfpr->flags |= SEC_EXCLUDE;
7108 }
7109
7110 if (bfd_link_relocatable (info))
7111 return TRUE;
7112
7113 if (htab->elf.hgot != NULL)
7114 {
7115 _bfd_elf_link_hash_hide_symbol (info, htab->elf.hgot, TRUE);
7116 /* Make .TOC. defined so as to prevent it being made dynamic.
7117 The wrong value here is fixed later in ppc64_elf_set_toc. */
7118 if (!htab->elf.hgot->def_regular
7119 || htab->elf.hgot->root.type != bfd_link_hash_defined)
7120 {
7121 htab->elf.hgot->root.type = bfd_link_hash_defined;
7122 htab->elf.hgot->root.u.def.value = 0;
7123 htab->elf.hgot->root.u.def.section = bfd_abs_section_ptr;
7124 htab->elf.hgot->def_regular = 1;
7125 htab->elf.hgot->root.linker_def = 1;
7126 }
7127 htab->elf.hgot->type = STT_OBJECT;
7128 htab->elf.hgot->other = ((htab->elf.hgot->other & ~ELF_ST_VISIBILITY (-1))
7129 | STV_HIDDEN);
7130 }
7131
7132 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
7133
7134 return TRUE;
7135 }
7136
7137 /* Return true if we have dynamic relocs against H that apply to
7138 read-only sections. */
7139
7140 static bfd_boolean
7141 readonly_dynrelocs (struct elf_link_hash_entry *h)
7142 {
7143 struct ppc_link_hash_entry *eh;
7144 struct elf_dyn_relocs *p;
7145
7146 eh = (struct ppc_link_hash_entry *) h;
7147 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7148 {
7149 asection *s = p->sec->output_section;
7150
7151 if (s != NULL && (s->flags & SEC_READONLY) != 0)
7152 return TRUE;
7153 }
7154 return FALSE;
7155 }
7156
7157 /* Return true if we have dynamic relocs against H or any of its weak
7158 aliases, that apply to read-only sections. */
7159
7160 static bfd_boolean
7161 alias_readonly_dynrelocs (struct elf_link_hash_entry *h)
7162 {
7163 struct ppc_link_hash_entry *eh;
7164
7165 eh = (struct ppc_link_hash_entry *) h;
7166 do
7167 {
7168 if (readonly_dynrelocs (&eh->elf))
7169 return TRUE;
7170 eh = eh->weakref;
7171 } while (eh != NULL && &eh->elf != h);
7172
7173 return FALSE;
7174 }
7175
7176 /* Return true if a global entry stub will be created for H. Valid
7177 for ELFv2 before plt entries have been allocated. */
7178
7179 static bfd_boolean
7180 global_entry_stub (struct elf_link_hash_entry *h)
7181 {
7182 struct plt_entry *pent;
7183
7184 if (!h->pointer_equality_needed
7185 || h->def_regular)
7186 return FALSE;
7187
7188 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
7189 if (pent->plt.refcount > 0
7190 && pent->addend == 0)
7191 return TRUE;
7192
7193 return FALSE;
7194 }
7195
7196 /* Adjust a symbol defined by a dynamic object and referenced by a
7197 regular object. The current definition is in some section of the
7198 dynamic object, but we're not including those sections. We have to
7199 change the definition to something the rest of the link can
7200 understand. */
7201
7202 static bfd_boolean
7203 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
7204 struct elf_link_hash_entry *h)
7205 {
7206 struct ppc_link_hash_table *htab;
7207 asection *s;
7208
7209 htab = ppc_hash_table (info);
7210 if (htab == NULL)
7211 return FALSE;
7212
7213 /* Deal with function syms. */
7214 if (h->type == STT_FUNC
7215 || h->type == STT_GNU_IFUNC
7216 || h->needs_plt)
7217 {
7218 /* Clear procedure linkage table information for any symbol that
7219 won't need a .plt entry. */
7220 struct plt_entry *ent;
7221 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
7222 if (ent->plt.refcount > 0)
7223 break;
7224 if (ent == NULL
7225 || (h->type != STT_GNU_IFUNC
7226 && (SYMBOL_CALLS_LOCAL (info, h)
7227 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
7228 && h->root.type == bfd_link_hash_undefweak)))
7229 || ((struct ppc_link_hash_entry *) h)->save_res)
7230 {
7231 h->plt.plist = NULL;
7232 h->needs_plt = 0;
7233 h->pointer_equality_needed = 0;
7234 }
7235 else if (abiversion (info->output_bfd) >= 2)
7236 {
7237 /* Taking a function's address in a read/write section
7238 doesn't require us to define the function symbol in the
7239 executable on a global entry stub. A dynamic reloc can
7240 be used instead. The reason we prefer a few more dynamic
7241 relocs is that calling via a global entry stub costs a
7242 few more instructions, and pointer_equality_needed causes
7243 extra work in ld.so when resolving these symbols. */
7244 if (global_entry_stub (h)
7245 && !alias_readonly_dynrelocs (h))
7246 {
7247 h->pointer_equality_needed = 0;
7248 /* After adjust_dynamic_symbol, non_got_ref set in
7249 the non-pic case means that dyn_relocs for this
7250 symbol should be discarded. */
7251 h->non_got_ref = 0;
7252 }
7253
7254 /* If making a plt entry, then we don't need copy relocs. */
7255 return TRUE;
7256 }
7257 }
7258 else
7259 h->plt.plist = NULL;
7260
7261 /* If this is a weak symbol, and there is a real definition, the
7262 processor independent code will have arranged for us to see the
7263 real definition first, and we can just use the same value. */
7264 if (h->u.weakdef != NULL)
7265 {
7266 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
7267 || h->u.weakdef->root.type == bfd_link_hash_defweak);
7268 h->root.u.def.section = h->u.weakdef->root.u.def.section;
7269 h->root.u.def.value = h->u.weakdef->root.u.def.value;
7270 if (ELIMINATE_COPY_RELOCS)
7271 h->non_got_ref = h->u.weakdef->non_got_ref;
7272 return TRUE;
7273 }
7274
7275 /* If we are creating a shared library, we must presume that the
7276 only references to the symbol are via the global offset table.
7277 For such cases we need not do anything here; the relocations will
7278 be handled correctly by relocate_section. */
7279 if (bfd_link_pic (info))
7280 return TRUE;
7281
7282 /* If there are no references to this symbol that do not use the
7283 GOT, we don't need to generate a copy reloc. */
7284 if (!h->non_got_ref)
7285 return TRUE;
7286
7287 /* Don't generate a copy reloc for symbols defined in the executable. */
7288 if (!h->def_dynamic || !h->ref_regular || h->def_regular
7289
7290 /* If -z nocopyreloc was given, don't generate them either. */
7291 || info->nocopyreloc
7292
7293 /* If we didn't find any dynamic relocs in read-only sections, then
7294 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
7295 || (ELIMINATE_COPY_RELOCS && !alias_readonly_dynrelocs (h))
7296
7297 /* Protected variables do not work with .dynbss. The copy in
7298 .dynbss won't be used by the shared library with the protected
7299 definition for the variable. Text relocations are preferable
7300 to an incorrect program. */
7301 || h->protected_def)
7302 {
7303 h->non_got_ref = 0;
7304 return TRUE;
7305 }
7306
7307 if (h->plt.plist != NULL)
7308 {
7309 /* We should never get here, but unfortunately there are versions
7310 of gcc out there that improperly (for this ABI) put initialized
7311 function pointers, vtable refs and suchlike in read-only
7312 sections. Allow them to proceed, but warn that this might
7313 break at runtime. */
7314 info->callbacks->einfo
7315 (_("%P: copy reloc against `%T' requires lazy plt linking; "
7316 "avoid setting LD_BIND_NOW=1 or upgrade gcc\n"),
7317 h->root.root.string);
7318 }
7319
7320 /* This is a reference to a symbol defined by a dynamic object which
7321 is not a function. */
7322
7323 /* We must allocate the symbol in our .dynbss section, which will
7324 become part of the .bss section of the executable. There will be
7325 an entry for this symbol in the .dynsym section. The dynamic
7326 object will contain position independent code, so all references
7327 from the dynamic object to this symbol will go through the global
7328 offset table. The dynamic linker will use the .dynsym entry to
7329 determine the address it must put in the global offset table, so
7330 both the dynamic object and the regular object will refer to the
7331 same memory location for the variable. */
7332
7333 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
7334 to copy the initial value out of the dynamic object and into the
7335 runtime process image. We need to remember the offset into the
7336 .rela.bss section we are going to use. */
7337 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
7338 {
7339 htab->relbss->size += sizeof (Elf64_External_Rela);
7340 h->needs_copy = 1;
7341 }
7342
7343 s = htab->dynbss;
7344
7345 return _bfd_elf_adjust_dynamic_copy (info, h, s);
7346 }
7347
7348 /* If given a function descriptor symbol, hide both the function code
7349 sym and the descriptor. */
7350 static void
7351 ppc64_elf_hide_symbol (struct bfd_link_info *info,
7352 struct elf_link_hash_entry *h,
7353 bfd_boolean force_local)
7354 {
7355 struct ppc_link_hash_entry *eh;
7356 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
7357
7358 eh = (struct ppc_link_hash_entry *) h;
7359 if (eh->is_func_descriptor)
7360 {
7361 struct ppc_link_hash_entry *fh = eh->oh;
7362
7363 if (fh == NULL)
7364 {
7365 const char *p, *q;
7366 struct ppc_link_hash_table *htab;
7367 char save;
7368
7369 /* We aren't supposed to use alloca in BFD because on
7370 systems which do not have alloca the version in libiberty
7371 calls xmalloc, which might cause the program to crash
7372 when it runs out of memory. This function doesn't have a
7373 return status, so there's no way to gracefully return an
7374 error. So cheat. We know that string[-1] can be safely
7375 accessed; It's either a string in an ELF string table,
7376 or allocated in an objalloc structure. */
7377
7378 p = eh->elf.root.root.string - 1;
7379 save = *p;
7380 *(char *) p = '.';
7381 htab = ppc_hash_table (info);
7382 if (htab == NULL)
7383 return;
7384
7385 fh = (struct ppc_link_hash_entry *)
7386 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
7387 *(char *) p = save;
7388
7389 /* Unfortunately, if it so happens that the string we were
7390 looking for was allocated immediately before this string,
7391 then we overwrote the string terminator. That's the only
7392 reason the lookup should fail. */
7393 if (fh == NULL)
7394 {
7395 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
7396 while (q >= eh->elf.root.root.string && *q == *p)
7397 --q, --p;
7398 if (q < eh->elf.root.root.string && *p == '.')
7399 fh = (struct ppc_link_hash_entry *)
7400 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
7401 }
7402 if (fh != NULL)
7403 {
7404 eh->oh = fh;
7405 fh->oh = eh;
7406 }
7407 }
7408 if (fh != NULL)
7409 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
7410 }
7411 }
7412
7413 static bfd_boolean
7414 get_sym_h (struct elf_link_hash_entry **hp,
7415 Elf_Internal_Sym **symp,
7416 asection **symsecp,
7417 unsigned char **tls_maskp,
7418 Elf_Internal_Sym **locsymsp,
7419 unsigned long r_symndx,
7420 bfd *ibfd)
7421 {
7422 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
7423
7424 if (r_symndx >= symtab_hdr->sh_info)
7425 {
7426 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
7427 struct elf_link_hash_entry *h;
7428
7429 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
7430 h = elf_follow_link (h);
7431
7432 if (hp != NULL)
7433 *hp = h;
7434
7435 if (symp != NULL)
7436 *symp = NULL;
7437
7438 if (symsecp != NULL)
7439 {
7440 asection *symsec = NULL;
7441 if (h->root.type == bfd_link_hash_defined
7442 || h->root.type == bfd_link_hash_defweak)
7443 symsec = h->root.u.def.section;
7444 *symsecp = symsec;
7445 }
7446
7447 if (tls_maskp != NULL)
7448 {
7449 struct ppc_link_hash_entry *eh;
7450
7451 eh = (struct ppc_link_hash_entry *) h;
7452 *tls_maskp = &eh->tls_mask;
7453 }
7454 }
7455 else
7456 {
7457 Elf_Internal_Sym *sym;
7458 Elf_Internal_Sym *locsyms = *locsymsp;
7459
7460 if (locsyms == NULL)
7461 {
7462 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
7463 if (locsyms == NULL)
7464 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
7465 symtab_hdr->sh_info,
7466 0, NULL, NULL, NULL);
7467 if (locsyms == NULL)
7468 return FALSE;
7469 *locsymsp = locsyms;
7470 }
7471 sym = locsyms + r_symndx;
7472
7473 if (hp != NULL)
7474 *hp = NULL;
7475
7476 if (symp != NULL)
7477 *symp = sym;
7478
7479 if (symsecp != NULL)
7480 *symsecp = bfd_section_from_elf_index (ibfd, sym->st_shndx);
7481
7482 if (tls_maskp != NULL)
7483 {
7484 struct got_entry **lgot_ents;
7485 unsigned char *tls_mask;
7486
7487 tls_mask = NULL;
7488 lgot_ents = elf_local_got_ents (ibfd);
7489 if (lgot_ents != NULL)
7490 {
7491 struct plt_entry **local_plt = (struct plt_entry **)
7492 (lgot_ents + symtab_hdr->sh_info);
7493 unsigned char *lgot_masks = (unsigned char *)
7494 (local_plt + symtab_hdr->sh_info);
7495 tls_mask = &lgot_masks[r_symndx];
7496 }
7497 *tls_maskp = tls_mask;
7498 }
7499 }
7500 return TRUE;
7501 }
7502
7503 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
7504 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
7505 type suitable for optimization, and 1 otherwise. */
7506
7507 static int
7508 get_tls_mask (unsigned char **tls_maskp,
7509 unsigned long *toc_symndx,
7510 bfd_vma *toc_addend,
7511 Elf_Internal_Sym **locsymsp,
7512 const Elf_Internal_Rela *rel,
7513 bfd *ibfd)
7514 {
7515 unsigned long r_symndx;
7516 int next_r;
7517 struct elf_link_hash_entry *h;
7518 Elf_Internal_Sym *sym;
7519 asection *sec;
7520 bfd_vma off;
7521
7522 r_symndx = ELF64_R_SYM (rel->r_info);
7523 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
7524 return 0;
7525
7526 if ((*tls_maskp != NULL && **tls_maskp != 0)
7527 || sec == NULL
7528 || ppc64_elf_section_data (sec) == NULL
7529 || ppc64_elf_section_data (sec)->sec_type != sec_toc)
7530 return 1;
7531
7532 /* Look inside a TOC section too. */
7533 if (h != NULL)
7534 {
7535 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
7536 off = h->root.u.def.value;
7537 }
7538 else
7539 off = sym->st_value;
7540 off += rel->r_addend;
7541 BFD_ASSERT (off % 8 == 0);
7542 r_symndx = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8];
7543 next_r = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8 + 1];
7544 if (toc_symndx != NULL)
7545 *toc_symndx = r_symndx;
7546 if (toc_addend != NULL)
7547 *toc_addend = ppc64_elf_section_data (sec)->u.toc.add[off / 8];
7548 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
7549 return 0;
7550 if ((h == NULL || is_static_defined (h))
7551 && (next_r == -1 || next_r == -2))
7552 return 1 - next_r;
7553 return 1;
7554 }
7555
7556 /* Find (or create) an entry in the tocsave hash table. */
7557
7558 static struct tocsave_entry *
7559 tocsave_find (struct ppc_link_hash_table *htab,
7560 enum insert_option insert,
7561 Elf_Internal_Sym **local_syms,
7562 const Elf_Internal_Rela *irela,
7563 bfd *ibfd)
7564 {
7565 unsigned long r_indx;
7566 struct elf_link_hash_entry *h;
7567 Elf_Internal_Sym *sym;
7568 struct tocsave_entry ent, *p;
7569 hashval_t hash;
7570 struct tocsave_entry **slot;
7571
7572 r_indx = ELF64_R_SYM (irela->r_info);
7573 if (!get_sym_h (&h, &sym, &ent.sec, NULL, local_syms, r_indx, ibfd))
7574 return NULL;
7575 if (ent.sec == NULL || ent.sec->output_section == NULL)
7576 {
7577 (*_bfd_error_handler)
7578 (_("%B: undefined symbol on R_PPC64_TOCSAVE relocation"));
7579 return NULL;
7580 }
7581
7582 if (h != NULL)
7583 ent.offset = h->root.u.def.value;
7584 else
7585 ent.offset = sym->st_value;
7586 ent.offset += irela->r_addend;
7587
7588 hash = tocsave_htab_hash (&ent);
7589 slot = ((struct tocsave_entry **)
7590 htab_find_slot_with_hash (htab->tocsave_htab, &ent, hash, insert));
7591 if (slot == NULL)
7592 return NULL;
7593
7594 if (*slot == NULL)
7595 {
7596 p = (struct tocsave_entry *) bfd_alloc (ibfd, sizeof (*p));
7597 if (p == NULL)
7598 return NULL;
7599 *p = ent;
7600 *slot = p;
7601 }
7602 return *slot;
7603 }
7604
7605 /* Adjust all global syms defined in opd sections. In gcc generated
7606 code for the old ABI, these will already have been done. */
7607
7608 static bfd_boolean
7609 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
7610 {
7611 struct ppc_link_hash_entry *eh;
7612 asection *sym_sec;
7613 struct _opd_sec_data *opd;
7614
7615 if (h->root.type == bfd_link_hash_indirect)
7616 return TRUE;
7617
7618 if (h->root.type != bfd_link_hash_defined
7619 && h->root.type != bfd_link_hash_defweak)
7620 return TRUE;
7621
7622 eh = (struct ppc_link_hash_entry *) h;
7623 if (eh->adjust_done)
7624 return TRUE;
7625
7626 sym_sec = eh->elf.root.u.def.section;
7627 opd = get_opd_info (sym_sec);
7628 if (opd != NULL && opd->adjust != NULL)
7629 {
7630 long adjust = opd->adjust[OPD_NDX (eh->elf.root.u.def.value)];
7631 if (adjust == -1)
7632 {
7633 /* This entry has been deleted. */
7634 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
7635 if (dsec == NULL)
7636 {
7637 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
7638 if (discarded_section (dsec))
7639 {
7640 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
7641 break;
7642 }
7643 }
7644 eh->elf.root.u.def.value = 0;
7645 eh->elf.root.u.def.section = dsec;
7646 }
7647 else
7648 eh->elf.root.u.def.value += adjust;
7649 eh->adjust_done = 1;
7650 }
7651 return TRUE;
7652 }
7653
7654 /* Handles decrementing dynamic reloc counts for the reloc specified by
7655 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM
7656 have already been determined. */
7657
7658 static bfd_boolean
7659 dec_dynrel_count (bfd_vma r_info,
7660 asection *sec,
7661 struct bfd_link_info *info,
7662 Elf_Internal_Sym **local_syms,
7663 struct elf_link_hash_entry *h,
7664 Elf_Internal_Sym *sym)
7665 {
7666 enum elf_ppc64_reloc_type r_type;
7667 asection *sym_sec = NULL;
7668
7669 /* Can this reloc be dynamic? This switch, and later tests here
7670 should be kept in sync with the code in check_relocs. */
7671 r_type = ELF64_R_TYPE (r_info);
7672 switch (r_type)
7673 {
7674 default:
7675 return TRUE;
7676
7677 case R_PPC64_TPREL16:
7678 case R_PPC64_TPREL16_LO:
7679 case R_PPC64_TPREL16_HI:
7680 case R_PPC64_TPREL16_HA:
7681 case R_PPC64_TPREL16_DS:
7682 case R_PPC64_TPREL16_LO_DS:
7683 case R_PPC64_TPREL16_HIGH:
7684 case R_PPC64_TPREL16_HIGHA:
7685 case R_PPC64_TPREL16_HIGHER:
7686 case R_PPC64_TPREL16_HIGHERA:
7687 case R_PPC64_TPREL16_HIGHEST:
7688 case R_PPC64_TPREL16_HIGHESTA:
7689 if (!bfd_link_pic (info))
7690 return TRUE;
7691
7692 case R_PPC64_TPREL64:
7693 case R_PPC64_DTPMOD64:
7694 case R_PPC64_DTPREL64:
7695 case R_PPC64_ADDR64:
7696 case R_PPC64_REL30:
7697 case R_PPC64_REL32:
7698 case R_PPC64_REL64:
7699 case R_PPC64_ADDR14:
7700 case R_PPC64_ADDR14_BRNTAKEN:
7701 case R_PPC64_ADDR14_BRTAKEN:
7702 case R_PPC64_ADDR16:
7703 case R_PPC64_ADDR16_DS:
7704 case R_PPC64_ADDR16_HA:
7705 case R_PPC64_ADDR16_HI:
7706 case R_PPC64_ADDR16_HIGH:
7707 case R_PPC64_ADDR16_HIGHA:
7708 case R_PPC64_ADDR16_HIGHER:
7709 case R_PPC64_ADDR16_HIGHERA:
7710 case R_PPC64_ADDR16_HIGHEST:
7711 case R_PPC64_ADDR16_HIGHESTA:
7712 case R_PPC64_ADDR16_LO:
7713 case R_PPC64_ADDR16_LO_DS:
7714 case R_PPC64_ADDR24:
7715 case R_PPC64_ADDR32:
7716 case R_PPC64_UADDR16:
7717 case R_PPC64_UADDR32:
7718 case R_PPC64_UADDR64:
7719 case R_PPC64_TOC:
7720 break;
7721 }
7722
7723 if (local_syms != NULL)
7724 {
7725 unsigned long r_symndx;
7726 bfd *ibfd = sec->owner;
7727
7728 r_symndx = ELF64_R_SYM (r_info);
7729 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
7730 return FALSE;
7731 }
7732
7733 if ((bfd_link_pic (info)
7734 && (must_be_dyn_reloc (info, r_type)
7735 || (h != NULL
7736 && (!SYMBOLIC_BIND (info, h)
7737 || h->root.type == bfd_link_hash_defweak
7738 || !h->def_regular))))
7739 || (ELIMINATE_COPY_RELOCS
7740 && !bfd_link_pic (info)
7741 && h != NULL
7742 && (h->root.type == bfd_link_hash_defweak
7743 || !h->def_regular)))
7744 ;
7745 else
7746 return TRUE;
7747
7748 if (h != NULL)
7749 {
7750 struct elf_dyn_relocs *p;
7751 struct elf_dyn_relocs **pp;
7752 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
7753
7754 /* elf_gc_sweep may have already removed all dyn relocs associated
7755 with local syms for a given section. Also, symbol flags are
7756 changed by elf_gc_sweep_symbol, confusing the test above. Don't
7757 report a dynreloc miscount. */
7758 if (*pp == NULL && info->gc_sections)
7759 return TRUE;
7760
7761 while ((p = *pp) != NULL)
7762 {
7763 if (p->sec == sec)
7764 {
7765 if (!must_be_dyn_reloc (info, r_type))
7766 p->pc_count -= 1;
7767 p->count -= 1;
7768 if (p->count == 0)
7769 *pp = p->next;
7770 return TRUE;
7771 }
7772 pp = &p->next;
7773 }
7774 }
7775 else
7776 {
7777 struct ppc_dyn_relocs *p;
7778 struct ppc_dyn_relocs **pp;
7779 void *vpp;
7780 bfd_boolean is_ifunc;
7781
7782 if (local_syms == NULL)
7783 sym_sec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
7784 if (sym_sec == NULL)
7785 sym_sec = sec;
7786
7787 vpp = &elf_section_data (sym_sec)->local_dynrel;
7788 pp = (struct ppc_dyn_relocs **) vpp;
7789
7790 if (*pp == NULL && info->gc_sections)
7791 return TRUE;
7792
7793 is_ifunc = ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC;
7794 while ((p = *pp) != NULL)
7795 {
7796 if (p->sec == sec && p->ifunc == is_ifunc)
7797 {
7798 p->count -= 1;
7799 if (p->count == 0)
7800 *pp = p->next;
7801 return TRUE;
7802 }
7803 pp = &p->next;
7804 }
7805 }
7806
7807 info->callbacks->einfo (_("%P: dynreloc miscount for %B, section %A\n"),
7808 sec->owner, sec);
7809 bfd_set_error (bfd_error_bad_value);
7810 return FALSE;
7811 }
7812
7813 /* Remove unused Official Procedure Descriptor entries. Currently we
7814 only remove those associated with functions in discarded link-once
7815 sections, or weakly defined functions that have been overridden. It
7816 would be possible to remove many more entries for statically linked
7817 applications. */
7818
7819 bfd_boolean
7820 ppc64_elf_edit_opd (struct bfd_link_info *info)
7821 {
7822 bfd *ibfd;
7823 bfd_boolean some_edited = FALSE;
7824 asection *need_pad = NULL;
7825 struct ppc_link_hash_table *htab;
7826
7827 htab = ppc_hash_table (info);
7828 if (htab == NULL)
7829 return FALSE;
7830
7831 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
7832 {
7833 asection *sec;
7834 Elf_Internal_Rela *relstart, *rel, *relend;
7835 Elf_Internal_Shdr *symtab_hdr;
7836 Elf_Internal_Sym *local_syms;
7837 struct _opd_sec_data *opd;
7838 bfd_boolean need_edit, add_aux_fields, broken;
7839 bfd_size_type cnt_16b = 0;
7840
7841 if (!is_ppc64_elf (ibfd))
7842 continue;
7843
7844 sec = bfd_get_section_by_name (ibfd, ".opd");
7845 if (sec == NULL || sec->size == 0)
7846 continue;
7847
7848 if (sec->sec_info_type == SEC_INFO_TYPE_JUST_SYMS)
7849 continue;
7850
7851 if (sec->output_section == bfd_abs_section_ptr)
7852 continue;
7853
7854 /* Look through the section relocs. */
7855 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
7856 continue;
7857
7858 local_syms = NULL;
7859 symtab_hdr = &elf_symtab_hdr (ibfd);
7860
7861 /* Read the relocations. */
7862 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7863 info->keep_memory);
7864 if (relstart == NULL)
7865 return FALSE;
7866
7867 /* First run through the relocs to check they are sane, and to
7868 determine whether we need to edit this opd section. */
7869 need_edit = FALSE;
7870 broken = FALSE;
7871 need_pad = sec;
7872 relend = relstart + sec->reloc_count;
7873 for (rel = relstart; rel < relend; )
7874 {
7875 enum elf_ppc64_reloc_type r_type;
7876 unsigned long r_symndx;
7877 asection *sym_sec;
7878 struct elf_link_hash_entry *h;
7879 Elf_Internal_Sym *sym;
7880 bfd_vma offset;
7881
7882 /* .opd contains an array of 16 or 24 byte entries. We're
7883 only interested in the reloc pointing to a function entry
7884 point. */
7885 offset = rel->r_offset;
7886 if (rel + 1 == relend
7887 || rel[1].r_offset != offset + 8)
7888 {
7889 /* If someone messes with .opd alignment then after a
7890 "ld -r" we might have padding in the middle of .opd.
7891 Also, there's nothing to prevent someone putting
7892 something silly in .opd with the assembler. No .opd
7893 optimization for them! */
7894 broken_opd:
7895 (*_bfd_error_handler)
7896 (_("%B: .opd is not a regular array of opd entries"), ibfd);
7897 broken = TRUE;
7898 break;
7899 }
7900
7901 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
7902 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
7903 {
7904 (*_bfd_error_handler)
7905 (_("%B: unexpected reloc type %u in .opd section"),
7906 ibfd, r_type);
7907 broken = TRUE;
7908 break;
7909 }
7910
7911 r_symndx = ELF64_R_SYM (rel->r_info);
7912 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7913 r_symndx, ibfd))
7914 goto error_ret;
7915
7916 if (sym_sec == NULL || sym_sec->owner == NULL)
7917 {
7918 const char *sym_name;
7919 if (h != NULL)
7920 sym_name = h->root.root.string;
7921 else
7922 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
7923 sym_sec);
7924
7925 (*_bfd_error_handler)
7926 (_("%B: undefined sym `%s' in .opd section"),
7927 ibfd, sym_name);
7928 broken = TRUE;
7929 break;
7930 }
7931
7932 /* opd entries are always for functions defined in the
7933 current input bfd. If the symbol isn't defined in the
7934 input bfd, then we won't be using the function in this
7935 bfd; It must be defined in a linkonce section in another
7936 bfd, or is weak. It's also possible that we are
7937 discarding the function due to a linker script /DISCARD/,
7938 which we test for via the output_section. */
7939 if (sym_sec->owner != ibfd
7940 || sym_sec->output_section == bfd_abs_section_ptr)
7941 need_edit = TRUE;
7942
7943 rel += 2;
7944 if (rel + 1 == relend
7945 || (rel + 2 < relend
7946 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC))
7947 ++rel;
7948
7949 if (rel == relend)
7950 {
7951 if (sec->size == offset + 24)
7952 {
7953 need_pad = NULL;
7954 break;
7955 }
7956 if (sec->size == offset + 16)
7957 {
7958 cnt_16b++;
7959 break;
7960 }
7961 goto broken_opd;
7962 }
7963 else if (rel + 1 < relend
7964 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
7965 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
7966 {
7967 if (rel[0].r_offset == offset + 16)
7968 cnt_16b++;
7969 else if (rel[0].r_offset != offset + 24)
7970 goto broken_opd;
7971 }
7972 else
7973 goto broken_opd;
7974 }
7975
7976 add_aux_fields = htab->params->non_overlapping_opd && cnt_16b > 0;
7977
7978 if (!broken && (need_edit || add_aux_fields))
7979 {
7980 Elf_Internal_Rela *write_rel;
7981 Elf_Internal_Shdr *rel_hdr;
7982 bfd_byte *rptr, *wptr;
7983 bfd_byte *new_contents;
7984 bfd_size_type amt;
7985
7986 new_contents = NULL;
7987 amt = OPD_NDX (sec->size) * sizeof (long);
7988 opd = &ppc64_elf_section_data (sec)->u.opd;
7989 opd->adjust = bfd_zalloc (sec->owner, amt);
7990 if (opd->adjust == NULL)
7991 return FALSE;
7992 ppc64_elf_section_data (sec)->sec_type = sec_opd;
7993
7994 /* This seems a waste of time as input .opd sections are all
7995 zeros as generated by gcc, but I suppose there's no reason
7996 this will always be so. We might start putting something in
7997 the third word of .opd entries. */
7998 if ((sec->flags & SEC_IN_MEMORY) == 0)
7999 {
8000 bfd_byte *loc;
8001 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
8002 {
8003 if (loc != NULL)
8004 free (loc);
8005 error_ret:
8006 if (local_syms != NULL
8007 && symtab_hdr->contents != (unsigned char *) local_syms)
8008 free (local_syms);
8009 if (elf_section_data (sec)->relocs != relstart)
8010 free (relstart);
8011 return FALSE;
8012 }
8013 sec->contents = loc;
8014 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
8015 }
8016
8017 elf_section_data (sec)->relocs = relstart;
8018
8019 new_contents = sec->contents;
8020 if (add_aux_fields)
8021 {
8022 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
8023 if (new_contents == NULL)
8024 return FALSE;
8025 need_pad = NULL;
8026 }
8027 wptr = new_contents;
8028 rptr = sec->contents;
8029 write_rel = relstart;
8030 for (rel = relstart; rel < relend; )
8031 {
8032 unsigned long r_symndx;
8033 asection *sym_sec;
8034 struct elf_link_hash_entry *h;
8035 struct ppc_link_hash_entry *fdh = NULL;
8036 Elf_Internal_Sym *sym;
8037 long opd_ent_size;
8038 Elf_Internal_Rela *next_rel;
8039 bfd_boolean skip;
8040
8041 r_symndx = ELF64_R_SYM (rel->r_info);
8042 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8043 r_symndx, ibfd))
8044 goto error_ret;
8045
8046 next_rel = rel + 2;
8047 if (next_rel + 1 == relend
8048 || (next_rel + 2 < relend
8049 && ELF64_R_TYPE (next_rel[2].r_info) == R_PPC64_TOC))
8050 ++next_rel;
8051
8052 /* See if the .opd entry is full 24 byte or
8053 16 byte (with fd_aux entry overlapped with next
8054 fd_func). */
8055 opd_ent_size = 24;
8056 if (next_rel == relend)
8057 {
8058 if (sec->size == rel->r_offset + 16)
8059 opd_ent_size = 16;
8060 }
8061 else if (next_rel->r_offset == rel->r_offset + 16)
8062 opd_ent_size = 16;
8063
8064 if (h != NULL
8065 && h->root.root.string[0] == '.')
8066 {
8067 fdh = lookup_fdh ((struct ppc_link_hash_entry *) h, htab);
8068 if (fdh != NULL
8069 && fdh->elf.root.type != bfd_link_hash_defined
8070 && fdh->elf.root.type != bfd_link_hash_defweak)
8071 fdh = NULL;
8072 }
8073
8074 skip = (sym_sec->owner != ibfd
8075 || sym_sec->output_section == bfd_abs_section_ptr);
8076 if (skip)
8077 {
8078 if (fdh != NULL && sym_sec->owner == ibfd)
8079 {
8080 /* Arrange for the function descriptor sym
8081 to be dropped. */
8082 fdh->elf.root.u.def.value = 0;
8083 fdh->elf.root.u.def.section = sym_sec;
8084 }
8085 opd->adjust[OPD_NDX (rel->r_offset)] = -1;
8086
8087 if (NO_OPD_RELOCS || bfd_link_relocatable (info))
8088 rel = next_rel;
8089 else
8090 while (1)
8091 {
8092 if (!dec_dynrel_count (rel->r_info, sec, info,
8093 NULL, h, sym))
8094 goto error_ret;
8095
8096 if (++rel == next_rel)
8097 break;
8098
8099 r_symndx = ELF64_R_SYM (rel->r_info);
8100 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8101 r_symndx, ibfd))
8102 goto error_ret;
8103 }
8104 }
8105 else
8106 {
8107 /* We'll be keeping this opd entry. */
8108 long adjust;
8109
8110 if (fdh != NULL)
8111 {
8112 /* Redefine the function descriptor symbol to
8113 this location in the opd section. It is
8114 necessary to update the value here rather
8115 than using an array of adjustments as we do
8116 for local symbols, because various places
8117 in the generic ELF code use the value
8118 stored in u.def.value. */
8119 fdh->elf.root.u.def.value = wptr - new_contents;
8120 fdh->adjust_done = 1;
8121 }
8122
8123 /* Local syms are a bit tricky. We could
8124 tweak them as they can be cached, but
8125 we'd need to look through the local syms
8126 for the function descriptor sym which we
8127 don't have at the moment. So keep an
8128 array of adjustments. */
8129 adjust = (wptr - new_contents) - (rptr - sec->contents);
8130 opd->adjust[OPD_NDX (rel->r_offset)] = adjust;
8131
8132 if (wptr != rptr)
8133 memcpy (wptr, rptr, opd_ent_size);
8134 wptr += opd_ent_size;
8135 if (add_aux_fields && opd_ent_size == 16)
8136 {
8137 memset (wptr, '\0', 8);
8138 wptr += 8;
8139 }
8140
8141 /* We need to adjust any reloc offsets to point to the
8142 new opd entries. */
8143 for ( ; rel != next_rel; ++rel)
8144 {
8145 rel->r_offset += adjust;
8146 if (write_rel != rel)
8147 memcpy (write_rel, rel, sizeof (*rel));
8148 ++write_rel;
8149 }
8150 }
8151
8152 rptr += opd_ent_size;
8153 }
8154
8155 sec->size = wptr - new_contents;
8156 sec->reloc_count = write_rel - relstart;
8157 if (add_aux_fields)
8158 {
8159 free (sec->contents);
8160 sec->contents = new_contents;
8161 }
8162
8163 /* Fudge the header size too, as this is used later in
8164 elf_bfd_final_link if we are emitting relocs. */
8165 rel_hdr = _bfd_elf_single_rel_hdr (sec);
8166 rel_hdr->sh_size = sec->reloc_count * rel_hdr->sh_entsize;
8167 some_edited = TRUE;
8168 }
8169 else if (elf_section_data (sec)->relocs != relstart)
8170 free (relstart);
8171
8172 if (local_syms != NULL
8173 && symtab_hdr->contents != (unsigned char *) local_syms)
8174 {
8175 if (!info->keep_memory)
8176 free (local_syms);
8177 else
8178 symtab_hdr->contents = (unsigned char *) local_syms;
8179 }
8180 }
8181
8182 if (some_edited)
8183 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
8184
8185 /* If we are doing a final link and the last .opd entry is just 16 byte
8186 long, add a 8 byte padding after it. */
8187 if (need_pad != NULL && !bfd_link_relocatable (info))
8188 {
8189 bfd_byte *p;
8190
8191 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
8192 {
8193 BFD_ASSERT (need_pad->size > 0);
8194
8195 p = bfd_malloc (need_pad->size + 8);
8196 if (p == NULL)
8197 return FALSE;
8198
8199 if (! bfd_get_section_contents (need_pad->owner, need_pad,
8200 p, 0, need_pad->size))
8201 return FALSE;
8202
8203 need_pad->contents = p;
8204 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
8205 }
8206 else
8207 {
8208 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
8209 if (p == NULL)
8210 return FALSE;
8211
8212 need_pad->contents = p;
8213 }
8214
8215 memset (need_pad->contents + need_pad->size, 0, 8);
8216 need_pad->size += 8;
8217 }
8218
8219 return TRUE;
8220 }
8221
8222 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
8223
8224 asection *
8225 ppc64_elf_tls_setup (struct bfd_link_info *info)
8226 {
8227 struct ppc_link_hash_table *htab;
8228
8229 htab = ppc_hash_table (info);
8230 if (htab == NULL)
8231 return NULL;
8232
8233 if (abiversion (info->output_bfd) == 1)
8234 htab->opd_abi = 1;
8235
8236 if (htab->params->no_multi_toc)
8237 htab->do_multi_toc = 0;
8238 else if (!htab->do_multi_toc)
8239 htab->params->no_multi_toc = 1;
8240
8241 htab->tls_get_addr = ((struct ppc_link_hash_entry *)
8242 elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
8243 FALSE, FALSE, TRUE));
8244 /* Move dynamic linking info to the function descriptor sym. */
8245 if (htab->tls_get_addr != NULL)
8246 func_desc_adjust (&htab->tls_get_addr->elf, info);
8247 htab->tls_get_addr_fd = ((struct ppc_link_hash_entry *)
8248 elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
8249 FALSE, FALSE, TRUE));
8250 if (htab->params->tls_get_addr_opt)
8251 {
8252 struct elf_link_hash_entry *opt, *opt_fd, *tga, *tga_fd;
8253
8254 opt = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr_opt",
8255 FALSE, FALSE, TRUE);
8256 if (opt != NULL)
8257 func_desc_adjust (opt, info);
8258 opt_fd = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
8259 FALSE, FALSE, TRUE);
8260 if (opt_fd != NULL
8261 && (opt_fd->root.type == bfd_link_hash_defined
8262 || opt_fd->root.type == bfd_link_hash_defweak))
8263 {
8264 /* If glibc supports an optimized __tls_get_addr call stub,
8265 signalled by the presence of __tls_get_addr_opt, and we'll
8266 be calling __tls_get_addr via a plt call stub, then
8267 make __tls_get_addr point to __tls_get_addr_opt. */
8268 tga_fd = &htab->tls_get_addr_fd->elf;
8269 if (htab->elf.dynamic_sections_created
8270 && tga_fd != NULL
8271 && (tga_fd->type == STT_FUNC
8272 || tga_fd->needs_plt)
8273 && !(SYMBOL_CALLS_LOCAL (info, tga_fd)
8274 || (ELF_ST_VISIBILITY (tga_fd->other) != STV_DEFAULT
8275 && tga_fd->root.type == bfd_link_hash_undefweak)))
8276 {
8277 struct plt_entry *ent;
8278
8279 for (ent = tga_fd->plt.plist; ent != NULL; ent = ent->next)
8280 if (ent->plt.refcount > 0)
8281 break;
8282 if (ent != NULL)
8283 {
8284 tga_fd->root.type = bfd_link_hash_indirect;
8285 tga_fd->root.u.i.link = &opt_fd->root;
8286 ppc64_elf_copy_indirect_symbol (info, opt_fd, tga_fd);
8287 opt_fd->forced_local = 0;
8288 if (opt_fd->dynindx != -1)
8289 {
8290 /* Use __tls_get_addr_opt in dynamic relocations. */
8291 opt_fd->dynindx = -1;
8292 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
8293 opt_fd->dynstr_index);
8294 if (!bfd_elf_link_record_dynamic_symbol (info, opt_fd))
8295 return NULL;
8296 }
8297 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) opt_fd;
8298 tga = &htab->tls_get_addr->elf;
8299 if (opt != NULL && tga != NULL)
8300 {
8301 tga->root.type = bfd_link_hash_indirect;
8302 tga->root.u.i.link = &opt->root;
8303 ppc64_elf_copy_indirect_symbol (info, opt, tga);
8304 opt->forced_local = 0;
8305 _bfd_elf_link_hash_hide_symbol (info, opt,
8306 tga->forced_local);
8307 htab->tls_get_addr = (struct ppc_link_hash_entry *) opt;
8308 }
8309 htab->tls_get_addr_fd->oh = htab->tls_get_addr;
8310 htab->tls_get_addr_fd->is_func_descriptor = 1;
8311 if (htab->tls_get_addr != NULL)
8312 {
8313 htab->tls_get_addr->oh = htab->tls_get_addr_fd;
8314 htab->tls_get_addr->is_func = 1;
8315 }
8316 }
8317 }
8318 }
8319 else if (htab->params->tls_get_addr_opt < 0)
8320 htab->params->tls_get_addr_opt = 0;
8321 }
8322 return _bfd_elf_tls_setup (info->output_bfd, info);
8323 }
8324
8325 /* Return TRUE iff REL is a branch reloc with a global symbol matching
8326 HASH1 or HASH2. */
8327
8328 static bfd_boolean
8329 branch_reloc_hash_match (const bfd *ibfd,
8330 const Elf_Internal_Rela *rel,
8331 const struct ppc_link_hash_entry *hash1,
8332 const struct ppc_link_hash_entry *hash2)
8333 {
8334 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
8335 enum elf_ppc64_reloc_type r_type = ELF64_R_TYPE (rel->r_info);
8336 unsigned int r_symndx = ELF64_R_SYM (rel->r_info);
8337
8338 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
8339 {
8340 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
8341 struct elf_link_hash_entry *h;
8342
8343 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
8344 h = elf_follow_link (h);
8345 if (h == &hash1->elf || h == &hash2->elf)
8346 return TRUE;
8347 }
8348 return FALSE;
8349 }
8350
8351 /* Run through all the TLS relocs looking for optimization
8352 opportunities. The linker has been hacked (see ppc64elf.em) to do
8353 a preliminary section layout so that we know the TLS segment
8354 offsets. We can't optimize earlier because some optimizations need
8355 to know the tp offset, and we need to optimize before allocating
8356 dynamic relocations. */
8357
8358 bfd_boolean
8359 ppc64_elf_tls_optimize (struct bfd_link_info *info)
8360 {
8361 bfd *ibfd;
8362 asection *sec;
8363 struct ppc_link_hash_table *htab;
8364 unsigned char *toc_ref;
8365 int pass;
8366
8367 if (!bfd_link_executable (info))
8368 return TRUE;
8369
8370 htab = ppc_hash_table (info);
8371 if (htab == NULL)
8372 return FALSE;
8373
8374 /* Make two passes over the relocs. On the first pass, mark toc
8375 entries involved with tls relocs, and check that tls relocs
8376 involved in setting up a tls_get_addr call are indeed followed by
8377 such a call. If they are not, we can't do any tls optimization.
8378 On the second pass twiddle tls_mask flags to notify
8379 relocate_section that optimization can be done, and adjust got
8380 and plt refcounts. */
8381 toc_ref = NULL;
8382 for (pass = 0; pass < 2; ++pass)
8383 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
8384 {
8385 Elf_Internal_Sym *locsyms = NULL;
8386 asection *toc = bfd_get_section_by_name (ibfd, ".toc");
8387
8388 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8389 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
8390 {
8391 Elf_Internal_Rela *relstart, *rel, *relend;
8392 bfd_boolean found_tls_get_addr_arg = 0;
8393
8394 /* Read the relocations. */
8395 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8396 info->keep_memory);
8397 if (relstart == NULL)
8398 {
8399 free (toc_ref);
8400 return FALSE;
8401 }
8402
8403 relend = relstart + sec->reloc_count;
8404 for (rel = relstart; rel < relend; rel++)
8405 {
8406 enum elf_ppc64_reloc_type r_type;
8407 unsigned long r_symndx;
8408 struct elf_link_hash_entry *h;
8409 Elf_Internal_Sym *sym;
8410 asection *sym_sec;
8411 unsigned char *tls_mask;
8412 unsigned char tls_set, tls_clear, tls_type = 0;
8413 bfd_vma value;
8414 bfd_boolean ok_tprel, is_local;
8415 long toc_ref_index = 0;
8416 int expecting_tls_get_addr = 0;
8417 bfd_boolean ret = FALSE;
8418
8419 r_symndx = ELF64_R_SYM (rel->r_info);
8420 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
8421 r_symndx, ibfd))
8422 {
8423 err_free_rel:
8424 if (elf_section_data (sec)->relocs != relstart)
8425 free (relstart);
8426 if (toc_ref != NULL)
8427 free (toc_ref);
8428 if (locsyms != NULL
8429 && (elf_symtab_hdr (ibfd).contents
8430 != (unsigned char *) locsyms))
8431 free (locsyms);
8432 return ret;
8433 }
8434
8435 if (h != NULL)
8436 {
8437 if (h->root.type == bfd_link_hash_defined
8438 || h->root.type == bfd_link_hash_defweak)
8439 value = h->root.u.def.value;
8440 else if (h->root.type == bfd_link_hash_undefweak)
8441 value = 0;
8442 else
8443 {
8444 found_tls_get_addr_arg = 0;
8445 continue;
8446 }
8447 }
8448 else
8449 /* Symbols referenced by TLS relocs must be of type
8450 STT_TLS. So no need for .opd local sym adjust. */
8451 value = sym->st_value;
8452
8453 ok_tprel = FALSE;
8454 is_local = FALSE;
8455 if (h == NULL
8456 || !h->def_dynamic)
8457 {
8458 is_local = TRUE;
8459 if (h != NULL
8460 && h->root.type == bfd_link_hash_undefweak)
8461 ok_tprel = TRUE;
8462 else if (sym_sec != NULL
8463 && sym_sec->output_section != NULL)
8464 {
8465 value += sym_sec->output_offset;
8466 value += sym_sec->output_section->vma;
8467 value -= htab->elf.tls_sec->vma;
8468 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
8469 < (bfd_vma) 1 << 32);
8470 }
8471 }
8472
8473 r_type = ELF64_R_TYPE (rel->r_info);
8474 /* If this section has old-style __tls_get_addr calls
8475 without marker relocs, then check that each
8476 __tls_get_addr call reloc is preceded by a reloc
8477 that conceivably belongs to the __tls_get_addr arg
8478 setup insn. If we don't find matching arg setup
8479 relocs, don't do any tls optimization. */
8480 if (pass == 0
8481 && sec->has_tls_get_addr_call
8482 && h != NULL
8483 && (h == &htab->tls_get_addr->elf
8484 || h == &htab->tls_get_addr_fd->elf)
8485 && !found_tls_get_addr_arg
8486 && is_branch_reloc (r_type))
8487 {
8488 info->callbacks->minfo (_("%H __tls_get_addr lost arg, "
8489 "TLS optimization disabled\n"),
8490 ibfd, sec, rel->r_offset);
8491 ret = TRUE;
8492 goto err_free_rel;
8493 }
8494
8495 found_tls_get_addr_arg = 0;
8496 switch (r_type)
8497 {
8498 case R_PPC64_GOT_TLSLD16:
8499 case R_PPC64_GOT_TLSLD16_LO:
8500 expecting_tls_get_addr = 1;
8501 found_tls_get_addr_arg = 1;
8502 /* Fall thru */
8503
8504 case R_PPC64_GOT_TLSLD16_HI:
8505 case R_PPC64_GOT_TLSLD16_HA:
8506 /* These relocs should never be against a symbol
8507 defined in a shared lib. Leave them alone if
8508 that turns out to be the case. */
8509 if (!is_local)
8510 continue;
8511
8512 /* LD -> LE */
8513 tls_set = 0;
8514 tls_clear = TLS_LD;
8515 tls_type = TLS_TLS | TLS_LD;
8516 break;
8517
8518 case R_PPC64_GOT_TLSGD16:
8519 case R_PPC64_GOT_TLSGD16_LO:
8520 expecting_tls_get_addr = 1;
8521 found_tls_get_addr_arg = 1;
8522 /* Fall thru */
8523
8524 case R_PPC64_GOT_TLSGD16_HI:
8525 case R_PPC64_GOT_TLSGD16_HA:
8526 if (ok_tprel)
8527 /* GD -> LE */
8528 tls_set = 0;
8529 else
8530 /* GD -> IE */
8531 tls_set = TLS_TLS | TLS_TPRELGD;
8532 tls_clear = TLS_GD;
8533 tls_type = TLS_TLS | TLS_GD;
8534 break;
8535
8536 case R_PPC64_GOT_TPREL16_DS:
8537 case R_PPC64_GOT_TPREL16_LO_DS:
8538 case R_PPC64_GOT_TPREL16_HI:
8539 case R_PPC64_GOT_TPREL16_HA:
8540 if (ok_tprel)
8541 {
8542 /* IE -> LE */
8543 tls_set = 0;
8544 tls_clear = TLS_TPREL;
8545 tls_type = TLS_TLS | TLS_TPREL;
8546 break;
8547 }
8548 continue;
8549
8550 case R_PPC64_TLSGD:
8551 case R_PPC64_TLSLD:
8552 found_tls_get_addr_arg = 1;
8553 /* Fall thru */
8554
8555 case R_PPC64_TLS:
8556 case R_PPC64_TOC16:
8557 case R_PPC64_TOC16_LO:
8558 if (sym_sec == NULL || sym_sec != toc)
8559 continue;
8560
8561 /* Mark this toc entry as referenced by a TLS
8562 code sequence. We can do that now in the
8563 case of R_PPC64_TLS, and after checking for
8564 tls_get_addr for the TOC16 relocs. */
8565 if (toc_ref == NULL)
8566 toc_ref = bfd_zmalloc (toc->output_section->rawsize / 8);
8567 if (toc_ref == NULL)
8568 goto err_free_rel;
8569
8570 if (h != NULL)
8571 value = h->root.u.def.value;
8572 else
8573 value = sym->st_value;
8574 value += rel->r_addend;
8575 if (value % 8 != 0)
8576 continue;
8577 BFD_ASSERT (value < toc->size
8578 && toc->output_offset % 8 == 0);
8579 toc_ref_index = (value + toc->output_offset) / 8;
8580 if (r_type == R_PPC64_TLS
8581 || r_type == R_PPC64_TLSGD
8582 || r_type == R_PPC64_TLSLD)
8583 {
8584 toc_ref[toc_ref_index] = 1;
8585 continue;
8586 }
8587
8588 if (pass != 0 && toc_ref[toc_ref_index] == 0)
8589 continue;
8590
8591 tls_set = 0;
8592 tls_clear = 0;
8593 expecting_tls_get_addr = 2;
8594 break;
8595
8596 case R_PPC64_TPREL64:
8597 if (pass == 0
8598 || sec != toc
8599 || toc_ref == NULL
8600 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
8601 continue;
8602 if (ok_tprel)
8603 {
8604 /* IE -> LE */
8605 tls_set = TLS_EXPLICIT;
8606 tls_clear = TLS_TPREL;
8607 break;
8608 }
8609 continue;
8610
8611 case R_PPC64_DTPMOD64:
8612 if (pass == 0
8613 || sec != toc
8614 || toc_ref == NULL
8615 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
8616 continue;
8617 if (rel + 1 < relend
8618 && (rel[1].r_info
8619 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
8620 && rel[1].r_offset == rel->r_offset + 8)
8621 {
8622 if (ok_tprel)
8623 /* GD -> LE */
8624 tls_set = TLS_EXPLICIT | TLS_GD;
8625 else
8626 /* GD -> IE */
8627 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
8628 tls_clear = TLS_GD;
8629 }
8630 else
8631 {
8632 if (!is_local)
8633 continue;
8634
8635 /* LD -> LE */
8636 tls_set = TLS_EXPLICIT;
8637 tls_clear = TLS_LD;
8638 }
8639 break;
8640
8641 default:
8642 continue;
8643 }
8644
8645 if (pass == 0)
8646 {
8647 if (!expecting_tls_get_addr
8648 || !sec->has_tls_get_addr_call)
8649 continue;
8650
8651 if (rel + 1 < relend
8652 && branch_reloc_hash_match (ibfd, rel + 1,
8653 htab->tls_get_addr,
8654 htab->tls_get_addr_fd))
8655 {
8656 if (expecting_tls_get_addr == 2)
8657 {
8658 /* Check for toc tls entries. */
8659 unsigned char *toc_tls;
8660 int retval;
8661
8662 retval = get_tls_mask (&toc_tls, NULL, NULL,
8663 &locsyms,
8664 rel, ibfd);
8665 if (retval == 0)
8666 goto err_free_rel;
8667 if (toc_tls != NULL)
8668 {
8669 if ((*toc_tls & (TLS_GD | TLS_LD)) != 0)
8670 found_tls_get_addr_arg = 1;
8671 if (retval > 1)
8672 toc_ref[toc_ref_index] = 1;
8673 }
8674 }
8675 continue;
8676 }
8677
8678 if (expecting_tls_get_addr != 1)
8679 continue;
8680
8681 /* Uh oh, we didn't find the expected call. We
8682 could just mark this symbol to exclude it
8683 from tls optimization but it's safer to skip
8684 the entire optimization. */
8685 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
8686 "TLS optimization disabled\n"),
8687 ibfd, sec, rel->r_offset);
8688 ret = TRUE;
8689 goto err_free_rel;
8690 }
8691
8692 if (expecting_tls_get_addr && htab->tls_get_addr != NULL)
8693 {
8694 struct plt_entry *ent;
8695 for (ent = htab->tls_get_addr->elf.plt.plist;
8696 ent != NULL;
8697 ent = ent->next)
8698 if (ent->addend == 0)
8699 {
8700 if (ent->plt.refcount > 0)
8701 {
8702 ent->plt.refcount -= 1;
8703 expecting_tls_get_addr = 0;
8704 }
8705 break;
8706 }
8707 }
8708
8709 if (expecting_tls_get_addr && htab->tls_get_addr_fd != NULL)
8710 {
8711 struct plt_entry *ent;
8712 for (ent = htab->tls_get_addr_fd->elf.plt.plist;
8713 ent != NULL;
8714 ent = ent->next)
8715 if (ent->addend == 0)
8716 {
8717 if (ent->plt.refcount > 0)
8718 ent->plt.refcount -= 1;
8719 break;
8720 }
8721 }
8722
8723 if (tls_clear == 0)
8724 continue;
8725
8726 if ((tls_set & TLS_EXPLICIT) == 0)
8727 {
8728 struct got_entry *ent;
8729
8730 /* Adjust got entry for this reloc. */
8731 if (h != NULL)
8732 ent = h->got.glist;
8733 else
8734 ent = elf_local_got_ents (ibfd)[r_symndx];
8735
8736 for (; ent != NULL; ent = ent->next)
8737 if (ent->addend == rel->r_addend
8738 && ent->owner == ibfd
8739 && ent->tls_type == tls_type)
8740 break;
8741 if (ent == NULL)
8742 abort ();
8743
8744 if (tls_set == 0)
8745 {
8746 /* We managed to get rid of a got entry. */
8747 if (ent->got.refcount > 0)
8748 ent->got.refcount -= 1;
8749 }
8750 }
8751 else
8752 {
8753 /* If we got rid of a DTPMOD/DTPREL reloc pair then
8754 we'll lose one or two dyn relocs. */
8755 if (!dec_dynrel_count (rel->r_info, sec, info,
8756 NULL, h, sym))
8757 return FALSE;
8758
8759 if (tls_set == (TLS_EXPLICIT | TLS_GD))
8760 {
8761 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
8762 NULL, h, sym))
8763 return FALSE;
8764 }
8765 }
8766
8767 *tls_mask |= tls_set;
8768 *tls_mask &= ~tls_clear;
8769 }
8770
8771 if (elf_section_data (sec)->relocs != relstart)
8772 free (relstart);
8773 }
8774
8775 if (locsyms != NULL
8776 && (elf_symtab_hdr (ibfd).contents != (unsigned char *) locsyms))
8777 {
8778 if (!info->keep_memory)
8779 free (locsyms);
8780 else
8781 elf_symtab_hdr (ibfd).contents = (unsigned char *) locsyms;
8782 }
8783 }
8784
8785 if (toc_ref != NULL)
8786 free (toc_ref);
8787 return TRUE;
8788 }
8789
8790 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
8791 the values of any global symbols in a toc section that has been
8792 edited. Globals in toc sections should be a rarity, so this function
8793 sets a flag if any are found in toc sections other than the one just
8794 edited, so that futher hash table traversals can be avoided. */
8795
8796 struct adjust_toc_info
8797 {
8798 asection *toc;
8799 unsigned long *skip;
8800 bfd_boolean global_toc_syms;
8801 };
8802
8803 enum toc_skip_enum { ref_from_discarded = 1, can_optimize = 2 };
8804
8805 static bfd_boolean
8806 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
8807 {
8808 struct ppc_link_hash_entry *eh;
8809 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
8810 unsigned long i;
8811
8812 if (h->root.type != bfd_link_hash_defined
8813 && h->root.type != bfd_link_hash_defweak)
8814 return TRUE;
8815
8816 eh = (struct ppc_link_hash_entry *) h;
8817 if (eh->adjust_done)
8818 return TRUE;
8819
8820 if (eh->elf.root.u.def.section == toc_inf->toc)
8821 {
8822 if (eh->elf.root.u.def.value > toc_inf->toc->rawsize)
8823 i = toc_inf->toc->rawsize >> 3;
8824 else
8825 i = eh->elf.root.u.def.value >> 3;
8826
8827 if ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0)
8828 {
8829 (*_bfd_error_handler)
8830 (_("%s defined on removed toc entry"), eh->elf.root.root.string);
8831 do
8832 ++i;
8833 while ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0);
8834 eh->elf.root.u.def.value = (bfd_vma) i << 3;
8835 }
8836
8837 eh->elf.root.u.def.value -= toc_inf->skip[i];
8838 eh->adjust_done = 1;
8839 }
8840 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
8841 toc_inf->global_toc_syms = TRUE;
8842
8843 return TRUE;
8844 }
8845
8846 /* Return TRUE iff INSN is one we expect on a _LO variety toc/got reloc. */
8847
8848 static bfd_boolean
8849 ok_lo_toc_insn (unsigned int insn)
8850 {
8851 return ((insn & (0x3f << 26)) == 14u << 26 /* addi */
8852 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
8853 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
8854 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
8855 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
8856 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
8857 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
8858 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
8859 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
8860 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
8861 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
8862 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
8863 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
8864 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
8865 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
8866 && (insn & 3) != 1)
8867 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
8868 && ((insn & 3) == 0 || (insn & 3) == 3))
8869 || (insn & (0x3f << 26)) == 12u << 26 /* addic */);
8870 }
8871
8872 /* Examine all relocs referencing .toc sections in order to remove
8873 unused .toc entries. */
8874
8875 bfd_boolean
8876 ppc64_elf_edit_toc (struct bfd_link_info *info)
8877 {
8878 bfd *ibfd;
8879 struct adjust_toc_info toc_inf;
8880 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8881
8882 htab->do_toc_opt = 1;
8883 toc_inf.global_toc_syms = TRUE;
8884 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
8885 {
8886 asection *toc, *sec;
8887 Elf_Internal_Shdr *symtab_hdr;
8888 Elf_Internal_Sym *local_syms;
8889 Elf_Internal_Rela *relstart, *rel, *toc_relocs;
8890 unsigned long *skip, *drop;
8891 unsigned char *used;
8892 unsigned char *keep, last, some_unused;
8893
8894 if (!is_ppc64_elf (ibfd))
8895 continue;
8896
8897 toc = bfd_get_section_by_name (ibfd, ".toc");
8898 if (toc == NULL
8899 || toc->size == 0
8900 || toc->sec_info_type == SEC_INFO_TYPE_JUST_SYMS
8901 || discarded_section (toc))
8902 continue;
8903
8904 toc_relocs = NULL;
8905 local_syms = NULL;
8906 symtab_hdr = &elf_symtab_hdr (ibfd);
8907
8908 /* Look at sections dropped from the final link. */
8909 skip = NULL;
8910 relstart = NULL;
8911 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8912 {
8913 if (sec->reloc_count == 0
8914 || !discarded_section (sec)
8915 || get_opd_info (sec)
8916 || (sec->flags & SEC_ALLOC) == 0
8917 || (sec->flags & SEC_DEBUGGING) != 0)
8918 continue;
8919
8920 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
8921 if (relstart == NULL)
8922 goto error_ret;
8923
8924 /* Run through the relocs to see which toc entries might be
8925 unused. */
8926 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8927 {
8928 enum elf_ppc64_reloc_type r_type;
8929 unsigned long r_symndx;
8930 asection *sym_sec;
8931 struct elf_link_hash_entry *h;
8932 Elf_Internal_Sym *sym;
8933 bfd_vma val;
8934
8935 r_type = ELF64_R_TYPE (rel->r_info);
8936 switch (r_type)
8937 {
8938 default:
8939 continue;
8940
8941 case R_PPC64_TOC16:
8942 case R_PPC64_TOC16_LO:
8943 case R_PPC64_TOC16_HI:
8944 case R_PPC64_TOC16_HA:
8945 case R_PPC64_TOC16_DS:
8946 case R_PPC64_TOC16_LO_DS:
8947 break;
8948 }
8949
8950 r_symndx = ELF64_R_SYM (rel->r_info);
8951 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8952 r_symndx, ibfd))
8953 goto error_ret;
8954
8955 if (sym_sec != toc)
8956 continue;
8957
8958 if (h != NULL)
8959 val = h->root.u.def.value;
8960 else
8961 val = sym->st_value;
8962 val += rel->r_addend;
8963
8964 if (val >= toc->size)
8965 continue;
8966
8967 /* Anything in the toc ought to be aligned to 8 bytes.
8968 If not, don't mark as unused. */
8969 if (val & 7)
8970 continue;
8971
8972 if (skip == NULL)
8973 {
8974 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
8975 if (skip == NULL)
8976 goto error_ret;
8977 }
8978
8979 skip[val >> 3] = ref_from_discarded;
8980 }
8981
8982 if (elf_section_data (sec)->relocs != relstart)
8983 free (relstart);
8984 }
8985
8986 /* For largetoc loads of address constants, we can convert
8987 . addis rx,2,addr@got@ha
8988 . ld ry,addr@got@l(rx)
8989 to
8990 . addis rx,2,addr@toc@ha
8991 . addi ry,rx,addr@toc@l
8992 when addr is within 2G of the toc pointer. This then means
8993 that the word storing "addr" in the toc is no longer needed. */
8994
8995 if (!ppc64_elf_tdata (ibfd)->has_small_toc_reloc
8996 && toc->output_section->rawsize < (bfd_vma) 1 << 31
8997 && toc->reloc_count != 0)
8998 {
8999 /* Read toc relocs. */
9000 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
9001 info->keep_memory);
9002 if (toc_relocs == NULL)
9003 goto error_ret;
9004
9005 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
9006 {
9007 enum elf_ppc64_reloc_type r_type;
9008 unsigned long r_symndx;
9009 asection *sym_sec;
9010 struct elf_link_hash_entry *h;
9011 Elf_Internal_Sym *sym;
9012 bfd_vma val, addr;
9013
9014 r_type = ELF64_R_TYPE (rel->r_info);
9015 if (r_type != R_PPC64_ADDR64)
9016 continue;
9017
9018 r_symndx = ELF64_R_SYM (rel->r_info);
9019 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9020 r_symndx, ibfd))
9021 goto error_ret;
9022
9023 if (sym_sec == NULL
9024 || sym_sec->output_section == NULL
9025 || discarded_section (sym_sec))
9026 continue;
9027
9028 if (!SYMBOL_REFERENCES_LOCAL (info, h))
9029 continue;
9030
9031 if (h != NULL)
9032 {
9033 if (h->type == STT_GNU_IFUNC)
9034 continue;
9035 val = h->root.u.def.value;
9036 }
9037 else
9038 {
9039 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
9040 continue;
9041 val = sym->st_value;
9042 }
9043 val += rel->r_addend;
9044 val += sym_sec->output_section->vma + sym_sec->output_offset;
9045
9046 /* We don't yet know the exact toc pointer value, but we
9047 know it will be somewhere in the toc section. Don't
9048 optimize if the difference from any possible toc
9049 pointer is outside [ff..f80008000, 7fff7fff]. */
9050 addr = toc->output_section->vma + TOC_BASE_OFF;
9051 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
9052 continue;
9053
9054 addr = toc->output_section->vma + toc->output_section->rawsize;
9055 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
9056 continue;
9057
9058 if (skip == NULL)
9059 {
9060 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
9061 if (skip == NULL)
9062 goto error_ret;
9063 }
9064
9065 skip[rel->r_offset >> 3]
9066 |= can_optimize | ((rel - toc_relocs) << 2);
9067 }
9068 }
9069
9070 if (skip == NULL)
9071 continue;
9072
9073 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
9074 if (used == NULL)
9075 {
9076 error_ret:
9077 if (local_syms != NULL
9078 && symtab_hdr->contents != (unsigned char *) local_syms)
9079 free (local_syms);
9080 if (sec != NULL
9081 && relstart != NULL
9082 && elf_section_data (sec)->relocs != relstart)
9083 free (relstart);
9084 if (toc_relocs != NULL
9085 && elf_section_data (toc)->relocs != toc_relocs)
9086 free (toc_relocs);
9087 if (skip != NULL)
9088 free (skip);
9089 return FALSE;
9090 }
9091
9092 /* Now check all kept sections that might reference the toc.
9093 Check the toc itself last. */
9094 for (sec = (ibfd->sections == toc && toc->next ? toc->next
9095 : ibfd->sections);
9096 sec != NULL;
9097 sec = (sec == toc ? NULL
9098 : sec->next == NULL ? toc
9099 : sec->next == toc && toc->next ? toc->next
9100 : sec->next))
9101 {
9102 int repeat;
9103
9104 if (sec->reloc_count == 0
9105 || discarded_section (sec)
9106 || get_opd_info (sec)
9107 || (sec->flags & SEC_ALLOC) == 0
9108 || (sec->flags & SEC_DEBUGGING) != 0)
9109 continue;
9110
9111 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
9112 info->keep_memory);
9113 if (relstart == NULL)
9114 {
9115 free (used);
9116 goto error_ret;
9117 }
9118
9119 /* Mark toc entries referenced as used. */
9120 do
9121 {
9122 repeat = 0;
9123 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
9124 {
9125 enum elf_ppc64_reloc_type r_type;
9126 unsigned long r_symndx;
9127 asection *sym_sec;
9128 struct elf_link_hash_entry *h;
9129 Elf_Internal_Sym *sym;
9130 bfd_vma val;
9131 enum {no_check, check_lo, check_ha} insn_check;
9132
9133 r_type = ELF64_R_TYPE (rel->r_info);
9134 switch (r_type)
9135 {
9136 default:
9137 insn_check = no_check;
9138 break;
9139
9140 case R_PPC64_GOT_TLSLD16_HA:
9141 case R_PPC64_GOT_TLSGD16_HA:
9142 case R_PPC64_GOT_TPREL16_HA:
9143 case R_PPC64_GOT_DTPREL16_HA:
9144 case R_PPC64_GOT16_HA:
9145 case R_PPC64_TOC16_HA:
9146 insn_check = check_ha;
9147 break;
9148
9149 case R_PPC64_GOT_TLSLD16_LO:
9150 case R_PPC64_GOT_TLSGD16_LO:
9151 case R_PPC64_GOT_TPREL16_LO_DS:
9152 case R_PPC64_GOT_DTPREL16_LO_DS:
9153 case R_PPC64_GOT16_LO:
9154 case R_PPC64_GOT16_LO_DS:
9155 case R_PPC64_TOC16_LO:
9156 case R_PPC64_TOC16_LO_DS:
9157 insn_check = check_lo;
9158 break;
9159 }
9160
9161 if (insn_check != no_check)
9162 {
9163 bfd_vma off = rel->r_offset & ~3;
9164 unsigned char buf[4];
9165 unsigned int insn;
9166
9167 if (!bfd_get_section_contents (ibfd, sec, buf, off, 4))
9168 {
9169 free (used);
9170 goto error_ret;
9171 }
9172 insn = bfd_get_32 (ibfd, buf);
9173 if (insn_check == check_lo
9174 ? !ok_lo_toc_insn (insn)
9175 : ((insn & ((0x3f << 26) | 0x1f << 16))
9176 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */))
9177 {
9178 char str[12];
9179
9180 ppc64_elf_tdata (ibfd)->unexpected_toc_insn = 1;
9181 sprintf (str, "%#08x", insn);
9182 info->callbacks->einfo
9183 (_("%P: %H: toc optimization is not supported for"
9184 " %s instruction.\n"),
9185 ibfd, sec, rel->r_offset & ~3, str);
9186 }
9187 }
9188
9189 switch (r_type)
9190 {
9191 case R_PPC64_TOC16:
9192 case R_PPC64_TOC16_LO:
9193 case R_PPC64_TOC16_HI:
9194 case R_PPC64_TOC16_HA:
9195 case R_PPC64_TOC16_DS:
9196 case R_PPC64_TOC16_LO_DS:
9197 /* In case we're taking addresses of toc entries. */
9198 case R_PPC64_ADDR64:
9199 break;
9200
9201 default:
9202 continue;
9203 }
9204
9205 r_symndx = ELF64_R_SYM (rel->r_info);
9206 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9207 r_symndx, ibfd))
9208 {
9209 free (used);
9210 goto error_ret;
9211 }
9212
9213 if (sym_sec != toc)
9214 continue;
9215
9216 if (h != NULL)
9217 val = h->root.u.def.value;
9218 else
9219 val = sym->st_value;
9220 val += rel->r_addend;
9221
9222 if (val >= toc->size)
9223 continue;
9224
9225 if ((skip[val >> 3] & can_optimize) != 0)
9226 {
9227 bfd_vma off;
9228 unsigned char opc;
9229
9230 switch (r_type)
9231 {
9232 case R_PPC64_TOC16_HA:
9233 break;
9234
9235 case R_PPC64_TOC16_LO_DS:
9236 off = rel->r_offset;
9237 off += (bfd_big_endian (ibfd) ? -2 : 3);
9238 if (!bfd_get_section_contents (ibfd, sec, &opc,
9239 off, 1))
9240 {
9241 free (used);
9242 goto error_ret;
9243 }
9244 if ((opc & (0x3f << 2)) == (58u << 2))
9245 break;
9246 /* Fall thru */
9247
9248 default:
9249 /* Wrong sort of reloc, or not a ld. We may
9250 as well clear ref_from_discarded too. */
9251 skip[val >> 3] = 0;
9252 }
9253 }
9254
9255 if (sec != toc)
9256 used[val >> 3] = 1;
9257 /* For the toc section, we only mark as used if this
9258 entry itself isn't unused. */
9259 else if ((used[rel->r_offset >> 3]
9260 || !(skip[rel->r_offset >> 3] & ref_from_discarded))
9261 && !used[val >> 3])
9262 {
9263 /* Do all the relocs again, to catch reference
9264 chains. */
9265 repeat = 1;
9266 used[val >> 3] = 1;
9267 }
9268 }
9269 }
9270 while (repeat);
9271
9272 if (elf_section_data (sec)->relocs != relstart)
9273 free (relstart);
9274 }
9275
9276 /* Merge the used and skip arrays. Assume that TOC
9277 doublewords not appearing as either used or unused belong
9278 to to an entry more than one doubleword in size. */
9279 for (drop = skip, keep = used, last = 0, some_unused = 0;
9280 drop < skip + (toc->size + 7) / 8;
9281 ++drop, ++keep)
9282 {
9283 if (*keep)
9284 {
9285 *drop &= ~ref_from_discarded;
9286 if ((*drop & can_optimize) != 0)
9287 some_unused = 1;
9288 last = 0;
9289 }
9290 else if ((*drop & ref_from_discarded) != 0)
9291 {
9292 some_unused = 1;
9293 last = ref_from_discarded;
9294 }
9295 else
9296 *drop = last;
9297 }
9298
9299 free (used);
9300
9301 if (some_unused)
9302 {
9303 bfd_byte *contents, *src;
9304 unsigned long off;
9305 Elf_Internal_Sym *sym;
9306 bfd_boolean local_toc_syms = FALSE;
9307
9308 /* Shuffle the toc contents, and at the same time convert the
9309 skip array from booleans into offsets. */
9310 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
9311 goto error_ret;
9312
9313 elf_section_data (toc)->this_hdr.contents = contents;
9314
9315 for (src = contents, off = 0, drop = skip;
9316 src < contents + toc->size;
9317 src += 8, ++drop)
9318 {
9319 if ((*drop & (can_optimize | ref_from_discarded)) != 0)
9320 off += 8;
9321 else if (off != 0)
9322 {
9323 *drop = off;
9324 memcpy (src - off, src, 8);
9325 }
9326 }
9327 *drop = off;
9328 toc->rawsize = toc->size;
9329 toc->size = src - contents - off;
9330
9331 /* Adjust addends for relocs against the toc section sym,
9332 and optimize any accesses we can. */
9333 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
9334 {
9335 if (sec->reloc_count == 0
9336 || discarded_section (sec))
9337 continue;
9338
9339 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
9340 info->keep_memory);
9341 if (relstart == NULL)
9342 goto error_ret;
9343
9344 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
9345 {
9346 enum elf_ppc64_reloc_type r_type;
9347 unsigned long r_symndx;
9348 asection *sym_sec;
9349 struct elf_link_hash_entry *h;
9350 bfd_vma val;
9351
9352 r_type = ELF64_R_TYPE (rel->r_info);
9353 switch (r_type)
9354 {
9355 default:
9356 continue;
9357
9358 case R_PPC64_TOC16:
9359 case R_PPC64_TOC16_LO:
9360 case R_PPC64_TOC16_HI:
9361 case R_PPC64_TOC16_HA:
9362 case R_PPC64_TOC16_DS:
9363 case R_PPC64_TOC16_LO_DS:
9364 case R_PPC64_ADDR64:
9365 break;
9366 }
9367
9368 r_symndx = ELF64_R_SYM (rel->r_info);
9369 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9370 r_symndx, ibfd))
9371 goto error_ret;
9372
9373 if (sym_sec != toc)
9374 continue;
9375
9376 if (h != NULL)
9377 val = h->root.u.def.value;
9378 else
9379 {
9380 val = sym->st_value;
9381 if (val != 0)
9382 local_toc_syms = TRUE;
9383 }
9384
9385 val += rel->r_addend;
9386
9387 if (val > toc->rawsize)
9388 val = toc->rawsize;
9389 else if ((skip[val >> 3] & ref_from_discarded) != 0)
9390 continue;
9391 else if ((skip[val >> 3] & can_optimize) != 0)
9392 {
9393 Elf_Internal_Rela *tocrel
9394 = toc_relocs + (skip[val >> 3] >> 2);
9395 unsigned long tsym = ELF64_R_SYM (tocrel->r_info);
9396
9397 switch (r_type)
9398 {
9399 case R_PPC64_TOC16_HA:
9400 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_TOC16_HA);
9401 break;
9402
9403 case R_PPC64_TOC16_LO_DS:
9404 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_LO_DS_OPT);
9405 break;
9406
9407 default:
9408 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
9409 ppc_howto_init ();
9410 info->callbacks->einfo
9411 (_("%P: %H: %s references "
9412 "optimized away TOC entry\n"),
9413 ibfd, sec, rel->r_offset,
9414 ppc64_elf_howto_table[r_type]->name);
9415 bfd_set_error (bfd_error_bad_value);
9416 goto error_ret;
9417 }
9418 rel->r_addend = tocrel->r_addend;
9419 elf_section_data (sec)->relocs = relstart;
9420 continue;
9421 }
9422
9423 if (h != NULL || sym->st_value != 0)
9424 continue;
9425
9426 rel->r_addend -= skip[val >> 3];
9427 elf_section_data (sec)->relocs = relstart;
9428 }
9429
9430 if (elf_section_data (sec)->relocs != relstart)
9431 free (relstart);
9432 }
9433
9434 /* We shouldn't have local or global symbols defined in the TOC,
9435 but handle them anyway. */
9436 if (local_syms != NULL)
9437 for (sym = local_syms;
9438 sym < local_syms + symtab_hdr->sh_info;
9439 ++sym)
9440 if (sym->st_value != 0
9441 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
9442 {
9443 unsigned long i;
9444
9445 if (sym->st_value > toc->rawsize)
9446 i = toc->rawsize >> 3;
9447 else
9448 i = sym->st_value >> 3;
9449
9450 if ((skip[i] & (ref_from_discarded | can_optimize)) != 0)
9451 {
9452 if (local_toc_syms)
9453 (*_bfd_error_handler)
9454 (_("%s defined on removed toc entry"),
9455 bfd_elf_sym_name (ibfd, symtab_hdr, sym, NULL));
9456 do
9457 ++i;
9458 while ((skip[i] & (ref_from_discarded | can_optimize)));
9459 sym->st_value = (bfd_vma) i << 3;
9460 }
9461
9462 sym->st_value -= skip[i];
9463 symtab_hdr->contents = (unsigned char *) local_syms;
9464 }
9465
9466 /* Adjust any global syms defined in this toc input section. */
9467 if (toc_inf.global_toc_syms)
9468 {
9469 toc_inf.toc = toc;
9470 toc_inf.skip = skip;
9471 toc_inf.global_toc_syms = FALSE;
9472 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
9473 &toc_inf);
9474 }
9475
9476 if (toc->reloc_count != 0)
9477 {
9478 Elf_Internal_Shdr *rel_hdr;
9479 Elf_Internal_Rela *wrel;
9480 bfd_size_type sz;
9481
9482 /* Remove unused toc relocs, and adjust those we keep. */
9483 if (toc_relocs == NULL)
9484 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
9485 info->keep_memory);
9486 if (toc_relocs == NULL)
9487 goto error_ret;
9488
9489 wrel = toc_relocs;
9490 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
9491 if ((skip[rel->r_offset >> 3]
9492 & (ref_from_discarded | can_optimize)) == 0)
9493 {
9494 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
9495 wrel->r_info = rel->r_info;
9496 wrel->r_addend = rel->r_addend;
9497 ++wrel;
9498 }
9499 else if (!dec_dynrel_count (rel->r_info, toc, info,
9500 &local_syms, NULL, NULL))
9501 goto error_ret;
9502
9503 elf_section_data (toc)->relocs = toc_relocs;
9504 toc->reloc_count = wrel - toc_relocs;
9505 rel_hdr = _bfd_elf_single_rel_hdr (toc);
9506 sz = rel_hdr->sh_entsize;
9507 rel_hdr->sh_size = toc->reloc_count * sz;
9508 }
9509 }
9510 else if (toc_relocs != NULL
9511 && elf_section_data (toc)->relocs != toc_relocs)
9512 free (toc_relocs);
9513
9514 if (local_syms != NULL
9515 && symtab_hdr->contents != (unsigned char *) local_syms)
9516 {
9517 if (!info->keep_memory)
9518 free (local_syms);
9519 else
9520 symtab_hdr->contents = (unsigned char *) local_syms;
9521 }
9522 free (skip);
9523 }
9524
9525 return TRUE;
9526 }
9527
9528 /* Return true iff input section I references the TOC using
9529 instructions limited to +/-32k offsets. */
9530
9531 bfd_boolean
9532 ppc64_elf_has_small_toc_reloc (asection *i)
9533 {
9534 return (is_ppc64_elf (i->owner)
9535 && ppc64_elf_tdata (i->owner)->has_small_toc_reloc);
9536 }
9537
9538 /* Allocate space for one GOT entry. */
9539
9540 static void
9541 allocate_got (struct elf_link_hash_entry *h,
9542 struct bfd_link_info *info,
9543 struct got_entry *gent)
9544 {
9545 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9546 bfd_boolean dyn;
9547 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
9548 int entsize = (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)
9549 ? 16 : 8);
9550 int rentsize = (gent->tls_type & eh->tls_mask & TLS_GD
9551 ? 2 : 1) * sizeof (Elf64_External_Rela);
9552 asection *got = ppc64_elf_tdata (gent->owner)->got;
9553
9554 gent->got.offset = got->size;
9555 got->size += entsize;
9556
9557 dyn = htab->elf.dynamic_sections_created;
9558 if (h->type == STT_GNU_IFUNC)
9559 {
9560 htab->elf.irelplt->size += rentsize;
9561 htab->got_reli_size += rentsize;
9562 }
9563 else if ((bfd_link_pic (info)
9564 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
9565 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
9566 || h->root.type != bfd_link_hash_undefweak))
9567 {
9568 asection *relgot = ppc64_elf_tdata (gent->owner)->relgot;
9569 relgot->size += rentsize;
9570 }
9571 }
9572
9573 /* This function merges got entries in the same toc group. */
9574
9575 static void
9576 merge_got_entries (struct got_entry **pent)
9577 {
9578 struct got_entry *ent, *ent2;
9579
9580 for (ent = *pent; ent != NULL; ent = ent->next)
9581 if (!ent->is_indirect)
9582 for (ent2 = ent->next; ent2 != NULL; ent2 = ent2->next)
9583 if (!ent2->is_indirect
9584 && ent2->addend == ent->addend
9585 && ent2->tls_type == ent->tls_type
9586 && elf_gp (ent2->owner) == elf_gp (ent->owner))
9587 {
9588 ent2->is_indirect = TRUE;
9589 ent2->got.ent = ent;
9590 }
9591 }
9592
9593 /* Allocate space in .plt, .got and associated reloc sections for
9594 dynamic relocs. */
9595
9596 static bfd_boolean
9597 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
9598 {
9599 struct bfd_link_info *info;
9600 struct ppc_link_hash_table *htab;
9601 asection *s;
9602 struct ppc_link_hash_entry *eh;
9603 struct got_entry **pgent, *gent;
9604
9605 if (h->root.type == bfd_link_hash_indirect)
9606 return TRUE;
9607
9608 info = (struct bfd_link_info *) inf;
9609 htab = ppc_hash_table (info);
9610 if (htab == NULL)
9611 return FALSE;
9612
9613 eh = (struct ppc_link_hash_entry *) h;
9614 /* Run through the TLS GD got entries first if we're changing them
9615 to TPREL. */
9616 if ((eh->tls_mask & TLS_TPRELGD) != 0)
9617 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9618 if (gent->got.refcount > 0
9619 && (gent->tls_type & TLS_GD) != 0)
9620 {
9621 /* This was a GD entry that has been converted to TPREL. If
9622 there happens to be a TPREL entry we can use that one. */
9623 struct got_entry *ent;
9624 for (ent = h->got.glist; ent != NULL; ent = ent->next)
9625 if (ent->got.refcount > 0
9626 && (ent->tls_type & TLS_TPREL) != 0
9627 && ent->addend == gent->addend
9628 && ent->owner == gent->owner)
9629 {
9630 gent->got.refcount = 0;
9631 break;
9632 }
9633
9634 /* If not, then we'll be using our own TPREL entry. */
9635 if (gent->got.refcount != 0)
9636 gent->tls_type = TLS_TLS | TLS_TPREL;
9637 }
9638
9639 /* Remove any list entry that won't generate a word in the GOT before
9640 we call merge_got_entries. Otherwise we risk merging to empty
9641 entries. */
9642 pgent = &h->got.glist;
9643 while ((gent = *pgent) != NULL)
9644 if (gent->got.refcount > 0)
9645 {
9646 if ((gent->tls_type & TLS_LD) != 0
9647 && !h->def_dynamic)
9648 {
9649 ppc64_tlsld_got (gent->owner)->got.refcount += 1;
9650 *pgent = gent->next;
9651 }
9652 else
9653 pgent = &gent->next;
9654 }
9655 else
9656 *pgent = gent->next;
9657
9658 if (!htab->do_multi_toc)
9659 merge_got_entries (&h->got.glist);
9660
9661 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9662 if (!gent->is_indirect)
9663 {
9664 /* Make sure this symbol is output as a dynamic symbol.
9665 Undefined weak syms won't yet be marked as dynamic,
9666 nor will all TLS symbols. */
9667 if (h->dynindx == -1
9668 && !h->forced_local
9669 && h->type != STT_GNU_IFUNC
9670 && htab->elf.dynamic_sections_created)
9671 {
9672 if (! bfd_elf_link_record_dynamic_symbol (info, h))
9673 return FALSE;
9674 }
9675
9676 if (!is_ppc64_elf (gent->owner))
9677 abort ();
9678
9679 allocate_got (h, info, gent);
9680 }
9681
9682 if (!htab->elf.dynamic_sections_created
9683 && h->type != STT_GNU_IFUNC)
9684 eh->dyn_relocs = NULL;
9685
9686 if (eh->dyn_relocs != NULL)
9687 {
9688 struct elf_dyn_relocs *p, **pp;
9689
9690 /* In the shared -Bsymbolic case, discard space allocated for
9691 dynamic pc-relative relocs against symbols which turn out to
9692 be defined in regular objects. For the normal shared case,
9693 discard space for relocs that have become local due to symbol
9694 visibility changes. */
9695
9696 if (bfd_link_pic (info))
9697 {
9698 /* Relocs that use pc_count are those that appear on a call
9699 insn, or certain REL relocs (see must_be_dyn_reloc) that
9700 can be generated via assembly. We want calls to
9701 protected symbols to resolve directly to the function
9702 rather than going via the plt. If people want function
9703 pointer comparisons to work as expected then they should
9704 avoid writing weird assembly. */
9705 if (SYMBOL_CALLS_LOCAL (info, h))
9706 {
9707 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
9708 {
9709 p->count -= p->pc_count;
9710 p->pc_count = 0;
9711 if (p->count == 0)
9712 *pp = p->next;
9713 else
9714 pp = &p->next;
9715 }
9716 }
9717
9718 /* Also discard relocs on undefined weak syms with
9719 non-default visibility. */
9720 if (eh->dyn_relocs != NULL
9721 && h->root.type == bfd_link_hash_undefweak)
9722 {
9723 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
9724 eh->dyn_relocs = NULL;
9725
9726 /* Make sure this symbol is output as a dynamic symbol.
9727 Undefined weak syms won't yet be marked as dynamic. */
9728 else if (h->dynindx == -1
9729 && !h->forced_local)
9730 {
9731 if (! bfd_elf_link_record_dynamic_symbol (info, h))
9732 return FALSE;
9733 }
9734 }
9735 }
9736 else if (h->type == STT_GNU_IFUNC)
9737 {
9738 /* A plt entry is always created when making direct calls to
9739 an ifunc, even when building a static executable, but
9740 that doesn't cover all cases. We may have only an ifunc
9741 initialised function pointer for a given ifunc symbol.
9742
9743 For ELFv2, dynamic relocations are not required when
9744 generating a global entry PLT stub. */
9745 if (abiversion (info->output_bfd) >= 2)
9746 {
9747 if (global_entry_stub (h))
9748 eh->dyn_relocs = NULL;
9749 }
9750
9751 /* For ELFv1 we have function descriptors. Descriptors need
9752 to be treated like PLT entries and thus have dynamic
9753 relocations. One exception is when the function
9754 descriptor is copied into .dynbss (which should only
9755 happen with ancient versions of gcc). */
9756 else if (h->needs_copy)
9757 eh->dyn_relocs = NULL;
9758 }
9759 else if (ELIMINATE_COPY_RELOCS)
9760 {
9761 /* For the non-pic case, discard space for relocs against
9762 symbols which turn out to need copy relocs or are not
9763 dynamic. */
9764
9765 /* First make sure this symbol is output as a dynamic symbol.
9766 Undefined weak syms won't yet be marked as dynamic. */
9767 if (h->root.type == bfd_link_hash_undefweak
9768 && !h->non_got_ref
9769 && !h->def_regular
9770 && h->dynindx == -1
9771 && !h->forced_local
9772 && !bfd_elf_link_record_dynamic_symbol (info, h))
9773 return FALSE;
9774
9775 if (h->non_got_ref
9776 || h->def_regular
9777 || h->dynindx == -1)
9778 eh->dyn_relocs = NULL;
9779 }
9780
9781 /* Finally, allocate space. */
9782 for (p = eh->dyn_relocs; p != NULL; p = p->next)
9783 {
9784 asection *sreloc = elf_section_data (p->sec)->sreloc;
9785 if (eh->elf.type == STT_GNU_IFUNC)
9786 sreloc = htab->elf.irelplt;
9787 sreloc->size += p->count * sizeof (Elf64_External_Rela);
9788 }
9789 }
9790
9791 if ((htab->elf.dynamic_sections_created
9792 && h->dynindx != -1
9793 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, bfd_link_pic (info), h))
9794 || h->type == STT_GNU_IFUNC)
9795 {
9796 struct plt_entry *pent;
9797 bfd_boolean doneone = FALSE;
9798 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
9799 if (pent->plt.refcount > 0)
9800 {
9801 if (!htab->elf.dynamic_sections_created
9802 || h->dynindx == -1)
9803 {
9804 s = htab->elf.iplt;
9805 pent->plt.offset = s->size;
9806 s->size += PLT_ENTRY_SIZE (htab);
9807 s = htab->elf.irelplt;
9808 }
9809 else
9810 {
9811 /* If this is the first .plt entry, make room for the special
9812 first entry. */
9813 s = htab->elf.splt;
9814 if (s->size == 0)
9815 s->size += PLT_INITIAL_ENTRY_SIZE (htab);
9816
9817 pent->plt.offset = s->size;
9818
9819 /* Make room for this entry. */
9820 s->size += PLT_ENTRY_SIZE (htab);
9821
9822 /* Make room for the .glink code. */
9823 s = htab->glink;
9824 if (s->size == 0)
9825 s->size += GLINK_CALL_STUB_SIZE;
9826 if (htab->opd_abi)
9827 {
9828 /* We need bigger stubs past index 32767. */
9829 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
9830 s->size += 4;
9831 s->size += 2*4;
9832 }
9833 else
9834 s->size += 4;
9835
9836 /* We also need to make an entry in the .rela.plt section. */
9837 s = htab->elf.srelplt;
9838 }
9839 s->size += sizeof (Elf64_External_Rela);
9840 doneone = TRUE;
9841 }
9842 else
9843 pent->plt.offset = (bfd_vma) -1;
9844 if (!doneone)
9845 {
9846 h->plt.plist = NULL;
9847 h->needs_plt = 0;
9848 }
9849 }
9850 else
9851 {
9852 h->plt.plist = NULL;
9853 h->needs_plt = 0;
9854 }
9855
9856 return TRUE;
9857 }
9858
9859 /* Called via elf_link_hash_traverse from ppc64_elf_size_dynamic_sections
9860 to set up space for global entry stubs. These are put in glink,
9861 after the branch table. */
9862
9863 static bfd_boolean
9864 size_global_entry_stubs (struct elf_link_hash_entry *h, void *inf)
9865 {
9866 struct bfd_link_info *info;
9867 struct ppc_link_hash_table *htab;
9868 struct plt_entry *pent;
9869 asection *s;
9870
9871 if (h->root.type == bfd_link_hash_indirect)
9872 return TRUE;
9873
9874 if (!h->pointer_equality_needed)
9875 return TRUE;
9876
9877 if (h->def_regular)
9878 return TRUE;
9879
9880 info = inf;
9881 htab = ppc_hash_table (info);
9882 if (htab == NULL)
9883 return FALSE;
9884
9885 s = htab->glink;
9886 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
9887 if (pent->plt.offset != (bfd_vma) -1
9888 && pent->addend == 0)
9889 {
9890 /* For ELFv2, if this symbol is not defined in a regular file
9891 and we are not generating a shared library or pie, then we
9892 need to define the symbol in the executable on a call stub.
9893 This is to avoid text relocations. */
9894 s->size = (s->size + 15) & -16;
9895 h->root.type = bfd_link_hash_defined;
9896 h->root.u.def.section = s;
9897 h->root.u.def.value = s->size;
9898 s->size += 16;
9899 break;
9900 }
9901 return TRUE;
9902 }
9903
9904 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
9905 read-only sections. */
9906
9907 static bfd_boolean
9908 maybe_set_textrel (struct elf_link_hash_entry *h, void *info)
9909 {
9910 if (h->root.type == bfd_link_hash_indirect)
9911 return TRUE;
9912
9913 if (readonly_dynrelocs (h))
9914 {
9915 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
9916
9917 /* Not an error, just cut short the traversal. */
9918 return FALSE;
9919 }
9920 return TRUE;
9921 }
9922
9923 /* Set the sizes of the dynamic sections. */
9924
9925 static bfd_boolean
9926 ppc64_elf_size_dynamic_sections (bfd *output_bfd,
9927 struct bfd_link_info *info)
9928 {
9929 struct ppc_link_hash_table *htab;
9930 bfd *dynobj;
9931 asection *s;
9932 bfd_boolean relocs;
9933 bfd *ibfd;
9934 struct got_entry *first_tlsld;
9935
9936 htab = ppc_hash_table (info);
9937 if (htab == NULL)
9938 return FALSE;
9939
9940 dynobj = htab->elf.dynobj;
9941 if (dynobj == NULL)
9942 abort ();
9943
9944 if (htab->elf.dynamic_sections_created)
9945 {
9946 /* Set the contents of the .interp section to the interpreter. */
9947 if (bfd_link_executable (info) && !info->nointerp)
9948 {
9949 s = bfd_get_linker_section (dynobj, ".interp");
9950 if (s == NULL)
9951 abort ();
9952 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
9953 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
9954 }
9955 }
9956
9957 /* Set up .got offsets for local syms, and space for local dynamic
9958 relocs. */
9959 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
9960 {
9961 struct got_entry **lgot_ents;
9962 struct got_entry **end_lgot_ents;
9963 struct plt_entry **local_plt;
9964 struct plt_entry **end_local_plt;
9965 unsigned char *lgot_masks;
9966 bfd_size_type locsymcount;
9967 Elf_Internal_Shdr *symtab_hdr;
9968
9969 if (!is_ppc64_elf (ibfd))
9970 continue;
9971
9972 for (s = ibfd->sections; s != NULL; s = s->next)
9973 {
9974 struct ppc_dyn_relocs *p;
9975
9976 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
9977 {
9978 if (!bfd_is_abs_section (p->sec)
9979 && bfd_is_abs_section (p->sec->output_section))
9980 {
9981 /* Input section has been discarded, either because
9982 it is a copy of a linkonce section or due to
9983 linker script /DISCARD/, so we'll be discarding
9984 the relocs too. */
9985 }
9986 else if (p->count != 0)
9987 {
9988 asection *srel = elf_section_data (p->sec)->sreloc;
9989 if (p->ifunc)
9990 srel = htab->elf.irelplt;
9991 srel->size += p->count * sizeof (Elf64_External_Rela);
9992 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
9993 info->flags |= DF_TEXTREL;
9994 }
9995 }
9996 }
9997
9998 lgot_ents = elf_local_got_ents (ibfd);
9999 if (!lgot_ents)
10000 continue;
10001
10002 symtab_hdr = &elf_symtab_hdr (ibfd);
10003 locsymcount = symtab_hdr->sh_info;
10004 end_lgot_ents = lgot_ents + locsymcount;
10005 local_plt = (struct plt_entry **) end_lgot_ents;
10006 end_local_plt = local_plt + locsymcount;
10007 lgot_masks = (unsigned char *) end_local_plt;
10008 s = ppc64_elf_tdata (ibfd)->got;
10009 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
10010 {
10011 struct got_entry **pent, *ent;
10012
10013 pent = lgot_ents;
10014 while ((ent = *pent) != NULL)
10015 if (ent->got.refcount > 0)
10016 {
10017 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
10018 {
10019 ppc64_tlsld_got (ibfd)->got.refcount += 1;
10020 *pent = ent->next;
10021 }
10022 else
10023 {
10024 unsigned int ent_size = 8;
10025 unsigned int rel_size = sizeof (Elf64_External_Rela);
10026
10027 ent->got.offset = s->size;
10028 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
10029 {
10030 ent_size *= 2;
10031 rel_size *= 2;
10032 }
10033 s->size += ent_size;
10034 if ((*lgot_masks & PLT_IFUNC) != 0)
10035 {
10036 htab->elf.irelplt->size += rel_size;
10037 htab->got_reli_size += rel_size;
10038 }
10039 else if (bfd_link_pic (info))
10040 {
10041 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
10042 srel->size += rel_size;
10043 }
10044 pent = &ent->next;
10045 }
10046 }
10047 else
10048 *pent = ent->next;
10049 }
10050
10051 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
10052 for (; local_plt < end_local_plt; ++local_plt)
10053 {
10054 struct plt_entry *ent;
10055
10056 for (ent = *local_plt; ent != NULL; ent = ent->next)
10057 if (ent->plt.refcount > 0)
10058 {
10059 s = htab->elf.iplt;
10060 ent->plt.offset = s->size;
10061 s->size += PLT_ENTRY_SIZE (htab);
10062
10063 htab->elf.irelplt->size += sizeof (Elf64_External_Rela);
10064 }
10065 else
10066 ent->plt.offset = (bfd_vma) -1;
10067 }
10068 }
10069
10070 /* Allocate global sym .plt and .got entries, and space for global
10071 sym dynamic relocs. */
10072 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
10073 /* Stash the end of glink branch table. */
10074 if (htab->glink != NULL)
10075 htab->glink->rawsize = htab->glink->size;
10076
10077 if (!htab->opd_abi && !bfd_link_pic (info))
10078 elf_link_hash_traverse (&htab->elf, size_global_entry_stubs, info);
10079
10080 first_tlsld = NULL;
10081 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
10082 {
10083 struct got_entry *ent;
10084
10085 if (!is_ppc64_elf (ibfd))
10086 continue;
10087
10088 ent = ppc64_tlsld_got (ibfd);
10089 if (ent->got.refcount > 0)
10090 {
10091 if (!htab->do_multi_toc && first_tlsld != NULL)
10092 {
10093 ent->is_indirect = TRUE;
10094 ent->got.ent = first_tlsld;
10095 }
10096 else
10097 {
10098 if (first_tlsld == NULL)
10099 first_tlsld = ent;
10100 s = ppc64_elf_tdata (ibfd)->got;
10101 ent->got.offset = s->size;
10102 ent->owner = ibfd;
10103 s->size += 16;
10104 if (bfd_link_pic (info))
10105 {
10106 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
10107 srel->size += sizeof (Elf64_External_Rela);
10108 }
10109 }
10110 }
10111 else
10112 ent->got.offset = (bfd_vma) -1;
10113 }
10114
10115 /* We now have determined the sizes of the various dynamic sections.
10116 Allocate memory for them. */
10117 relocs = FALSE;
10118 for (s = dynobj->sections; s != NULL; s = s->next)
10119 {
10120 if ((s->flags & SEC_LINKER_CREATED) == 0)
10121 continue;
10122
10123 if (s == htab->brlt || s == htab->relbrlt)
10124 /* These haven't been allocated yet; don't strip. */
10125 continue;
10126 else if (s == htab->elf.sgot
10127 || s == htab->elf.splt
10128 || s == htab->elf.iplt
10129 || s == htab->glink
10130 || s == htab->dynbss)
10131 {
10132 /* Strip this section if we don't need it; see the
10133 comment below. */
10134 }
10135 else if (s == htab->glink_eh_frame)
10136 {
10137 if (!bfd_is_abs_section (s->output_section))
10138 /* Not sized yet. */
10139 continue;
10140 }
10141 else if (CONST_STRNEQ (s->name, ".rela"))
10142 {
10143 if (s->size != 0)
10144 {
10145 if (s != htab->elf.srelplt)
10146 relocs = TRUE;
10147
10148 /* We use the reloc_count field as a counter if we need
10149 to copy relocs into the output file. */
10150 s->reloc_count = 0;
10151 }
10152 }
10153 else
10154 {
10155 /* It's not one of our sections, so don't allocate space. */
10156 continue;
10157 }
10158
10159 if (s->size == 0)
10160 {
10161 /* If we don't need this section, strip it from the
10162 output file. This is mostly to handle .rela.bss and
10163 .rela.plt. We must create both sections in
10164 create_dynamic_sections, because they must be created
10165 before the linker maps input sections to output
10166 sections. The linker does that before
10167 adjust_dynamic_symbol is called, and it is that
10168 function which decides whether anything needs to go
10169 into these sections. */
10170 s->flags |= SEC_EXCLUDE;
10171 continue;
10172 }
10173
10174 if ((s->flags & SEC_HAS_CONTENTS) == 0)
10175 continue;
10176
10177 /* Allocate memory for the section contents. We use bfd_zalloc
10178 here in case unused entries are not reclaimed before the
10179 section's contents are written out. This should not happen,
10180 but this way if it does we get a R_PPC64_NONE reloc in .rela
10181 sections instead of garbage.
10182 We also rely on the section contents being zero when writing
10183 the GOT. */
10184 s->contents = bfd_zalloc (dynobj, s->size);
10185 if (s->contents == NULL)
10186 return FALSE;
10187 }
10188
10189 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
10190 {
10191 if (!is_ppc64_elf (ibfd))
10192 continue;
10193
10194 s = ppc64_elf_tdata (ibfd)->got;
10195 if (s != NULL && s != htab->elf.sgot)
10196 {
10197 if (s->size == 0)
10198 s->flags |= SEC_EXCLUDE;
10199 else
10200 {
10201 s->contents = bfd_zalloc (ibfd, s->size);
10202 if (s->contents == NULL)
10203 return FALSE;
10204 }
10205 }
10206 s = ppc64_elf_tdata (ibfd)->relgot;
10207 if (s != NULL)
10208 {
10209 if (s->size == 0)
10210 s->flags |= SEC_EXCLUDE;
10211 else
10212 {
10213 s->contents = bfd_zalloc (ibfd, s->size);
10214 if (s->contents == NULL)
10215 return FALSE;
10216 relocs = TRUE;
10217 s->reloc_count = 0;
10218 }
10219 }
10220 }
10221
10222 if (htab->elf.dynamic_sections_created)
10223 {
10224 bfd_boolean tls_opt;
10225
10226 /* Add some entries to the .dynamic section. We fill in the
10227 values later, in ppc64_elf_finish_dynamic_sections, but we
10228 must add the entries now so that we get the correct size for
10229 the .dynamic section. The DT_DEBUG entry is filled in by the
10230 dynamic linker and used by the debugger. */
10231 #define add_dynamic_entry(TAG, VAL) \
10232 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
10233
10234 if (bfd_link_executable (info))
10235 {
10236 if (!add_dynamic_entry (DT_DEBUG, 0))
10237 return FALSE;
10238 }
10239
10240 if (htab->elf.splt != NULL && htab->elf.splt->size != 0)
10241 {
10242 if (!add_dynamic_entry (DT_PLTGOT, 0)
10243 || !add_dynamic_entry (DT_PLTRELSZ, 0)
10244 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
10245 || !add_dynamic_entry (DT_JMPREL, 0)
10246 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
10247 return FALSE;
10248 }
10249
10250 if (NO_OPD_RELOCS && abiversion (output_bfd) <= 1)
10251 {
10252 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
10253 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
10254 return FALSE;
10255 }
10256
10257 tls_opt = (htab->params->tls_get_addr_opt
10258 && htab->tls_get_addr_fd != NULL
10259 && htab->tls_get_addr_fd->elf.plt.plist != NULL);
10260 if (tls_opt || !htab->opd_abi)
10261 {
10262 if (!add_dynamic_entry (DT_PPC64_OPT, tls_opt ? PPC64_OPT_TLS : 0))
10263 return FALSE;
10264 }
10265
10266 if (relocs)
10267 {
10268 if (!add_dynamic_entry (DT_RELA, 0)
10269 || !add_dynamic_entry (DT_RELASZ, 0)
10270 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
10271 return FALSE;
10272
10273 /* If any dynamic relocs apply to a read-only section,
10274 then we need a DT_TEXTREL entry. */
10275 if ((info->flags & DF_TEXTREL) == 0)
10276 elf_link_hash_traverse (&htab->elf, maybe_set_textrel, info);
10277
10278 if ((info->flags & DF_TEXTREL) != 0)
10279 {
10280 if (!add_dynamic_entry (DT_TEXTREL, 0))
10281 return FALSE;
10282 }
10283 }
10284 }
10285 #undef add_dynamic_entry
10286
10287 return TRUE;
10288 }
10289
10290 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
10291
10292 static bfd_boolean
10293 ppc64_elf_hash_symbol (struct elf_link_hash_entry *h)
10294 {
10295 if (h->plt.plist != NULL
10296 && !h->def_regular
10297 && !h->pointer_equality_needed)
10298 return FALSE;
10299
10300 return _bfd_elf_hash_symbol (h);
10301 }
10302
10303 /* Determine the type of stub needed, if any, for a call. */
10304
10305 static inline enum ppc_stub_type
10306 ppc_type_of_stub (asection *input_sec,
10307 const Elf_Internal_Rela *rel,
10308 struct ppc_link_hash_entry **hash,
10309 struct plt_entry **plt_ent,
10310 bfd_vma destination,
10311 unsigned long local_off)
10312 {
10313 struct ppc_link_hash_entry *h = *hash;
10314 bfd_vma location;
10315 bfd_vma branch_offset;
10316 bfd_vma max_branch_offset;
10317 enum elf_ppc64_reloc_type r_type;
10318
10319 if (h != NULL)
10320 {
10321 struct plt_entry *ent;
10322 struct ppc_link_hash_entry *fdh = h;
10323 if (h->oh != NULL
10324 && h->oh->is_func_descriptor)
10325 {
10326 fdh = ppc_follow_link (h->oh);
10327 *hash = fdh;
10328 }
10329
10330 for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next)
10331 if (ent->addend == rel->r_addend
10332 && ent->plt.offset != (bfd_vma) -1)
10333 {
10334 *plt_ent = ent;
10335 return ppc_stub_plt_call;
10336 }
10337
10338 /* Here, we know we don't have a plt entry. If we don't have a
10339 either a defined function descriptor or a defined entry symbol
10340 in a regular object file, then it is pointless trying to make
10341 any other type of stub. */
10342 if (!is_static_defined (&fdh->elf)
10343 && !is_static_defined (&h->elf))
10344 return ppc_stub_none;
10345 }
10346 else if (elf_local_got_ents (input_sec->owner) != NULL)
10347 {
10348 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (input_sec->owner);
10349 struct plt_entry **local_plt = (struct plt_entry **)
10350 elf_local_got_ents (input_sec->owner) + symtab_hdr->sh_info;
10351 unsigned long r_symndx = ELF64_R_SYM (rel->r_info);
10352
10353 if (local_plt[r_symndx] != NULL)
10354 {
10355 struct plt_entry *ent;
10356
10357 for (ent = local_plt[r_symndx]; ent != NULL; ent = ent->next)
10358 if (ent->addend == rel->r_addend
10359 && ent->plt.offset != (bfd_vma) -1)
10360 {
10361 *plt_ent = ent;
10362 return ppc_stub_plt_call;
10363 }
10364 }
10365 }
10366
10367 /* Determine where the call point is. */
10368 location = (input_sec->output_offset
10369 + input_sec->output_section->vma
10370 + rel->r_offset);
10371
10372 branch_offset = destination - location;
10373 r_type = ELF64_R_TYPE (rel->r_info);
10374
10375 /* Determine if a long branch stub is needed. */
10376 max_branch_offset = 1 << 25;
10377 if (r_type != R_PPC64_REL24)
10378 max_branch_offset = 1 << 15;
10379
10380 if (branch_offset + max_branch_offset >= 2 * max_branch_offset - local_off)
10381 /* We need a stub. Figure out whether a long_branch or plt_branch
10382 is needed later. */
10383 return ppc_stub_long_branch;
10384
10385 return ppc_stub_none;
10386 }
10387
10388 /* With power7 weakly ordered memory model, it is possible for ld.so
10389 to update a plt entry in one thread and have another thread see a
10390 stale zero toc entry. To avoid this we need some sort of acquire
10391 barrier in the call stub. One solution is to make the load of the
10392 toc word seem to appear to depend on the load of the function entry
10393 word. Another solution is to test for r2 being zero, and branch to
10394 the appropriate glink entry if so.
10395
10396 . fake dep barrier compare
10397 . ld 12,xxx(2) ld 12,xxx(2)
10398 . mtctr 12 mtctr 12
10399 . xor 11,12,12 ld 2,xxx+8(2)
10400 . add 2,2,11 cmpldi 2,0
10401 . ld 2,xxx+8(2) bnectr+
10402 . bctr b <glink_entry>
10403
10404 The solution involving the compare turns out to be faster, so
10405 that's what we use unless the branch won't reach. */
10406
10407 #define ALWAYS_USE_FAKE_DEP 0
10408 #define ALWAYS_EMIT_R2SAVE 0
10409
10410 #define PPC_LO(v) ((v) & 0xffff)
10411 #define PPC_HI(v) (((v) >> 16) & 0xffff)
10412 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
10413
10414 static inline unsigned int
10415 plt_stub_size (struct ppc_link_hash_table *htab,
10416 struct ppc_stub_hash_entry *stub_entry,
10417 bfd_vma off)
10418 {
10419 unsigned size = 12;
10420
10421 if (ALWAYS_EMIT_R2SAVE
10422 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10423 size += 4;
10424 if (PPC_HA (off) != 0)
10425 size += 4;
10426 if (htab->opd_abi)
10427 {
10428 size += 4;
10429 if (htab->params->plt_static_chain)
10430 size += 4;
10431 if (htab->params->plt_thread_safe
10432 && htab->elf.dynamic_sections_created
10433 && stub_entry->h != NULL
10434 && stub_entry->h->elf.dynindx != -1)
10435 size += 8;
10436 if (PPC_HA (off + 8 + 8 * htab->params->plt_static_chain) != PPC_HA (off))
10437 size += 4;
10438 }
10439 if (stub_entry->h != NULL
10440 && (stub_entry->h == htab->tls_get_addr_fd
10441 || stub_entry->h == htab->tls_get_addr)
10442 && htab->params->tls_get_addr_opt)
10443 size += 13 * 4;
10444 return size;
10445 }
10446
10447 /* If this stub would cross fewer 2**plt_stub_align boundaries if we align,
10448 then return the padding needed to do so. */
10449 static inline unsigned int
10450 plt_stub_pad (struct ppc_link_hash_table *htab,
10451 struct ppc_stub_hash_entry *stub_entry,
10452 bfd_vma plt_off)
10453 {
10454 int stub_align = 1 << htab->params->plt_stub_align;
10455 unsigned stub_size = plt_stub_size (htab, stub_entry, plt_off);
10456 bfd_vma stub_off = stub_entry->group->stub_sec->size;
10457
10458 if (((stub_off + stub_size - 1) & -stub_align) - (stub_off & -stub_align)
10459 > ((stub_size - 1) & -stub_align))
10460 return stub_align - (stub_off & (stub_align - 1));
10461 return 0;
10462 }
10463
10464 /* Build a .plt call stub. */
10465
10466 static inline bfd_byte *
10467 build_plt_stub (struct ppc_link_hash_table *htab,
10468 struct ppc_stub_hash_entry *stub_entry,
10469 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
10470 {
10471 bfd *obfd = htab->params->stub_bfd;
10472 bfd_boolean plt_load_toc = htab->opd_abi;
10473 bfd_boolean plt_static_chain = htab->params->plt_static_chain;
10474 bfd_boolean plt_thread_safe = (htab->params->plt_thread_safe
10475 && htab->elf.dynamic_sections_created
10476 && stub_entry->h != NULL
10477 && stub_entry->h->elf.dynindx != -1);
10478 bfd_boolean use_fake_dep = plt_thread_safe;
10479 bfd_vma cmp_branch_off = 0;
10480
10481 if (!ALWAYS_USE_FAKE_DEP
10482 && plt_load_toc
10483 && plt_thread_safe
10484 && !((stub_entry->h == htab->tls_get_addr_fd
10485 || stub_entry->h == htab->tls_get_addr)
10486 && htab->params->tls_get_addr_opt))
10487 {
10488 bfd_vma pltoff = stub_entry->plt_ent->plt.offset & ~1;
10489 bfd_vma pltindex = ((pltoff - PLT_INITIAL_ENTRY_SIZE (htab))
10490 / PLT_ENTRY_SIZE (htab));
10491 bfd_vma glinkoff = GLINK_CALL_STUB_SIZE + pltindex * 8;
10492 bfd_vma to, from;
10493
10494 if (pltindex > 32768)
10495 glinkoff += (pltindex - 32768) * 4;
10496 to = (glinkoff
10497 + htab->glink->output_offset
10498 + htab->glink->output_section->vma);
10499 from = (p - stub_entry->group->stub_sec->contents
10500 + 4 * (ALWAYS_EMIT_R2SAVE
10501 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10502 + 4 * (PPC_HA (offset) != 0)
10503 + 4 * (PPC_HA (offset + 8 + 8 * plt_static_chain)
10504 != PPC_HA (offset))
10505 + 4 * (plt_static_chain != 0)
10506 + 20
10507 + stub_entry->group->stub_sec->output_offset
10508 + stub_entry->group->stub_sec->output_section->vma);
10509 cmp_branch_off = to - from;
10510 use_fake_dep = cmp_branch_off + (1 << 25) >= (1 << 26);
10511 }
10512
10513 if (PPC_HA (offset) != 0)
10514 {
10515 if (r != NULL)
10516 {
10517 if (ALWAYS_EMIT_R2SAVE
10518 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10519 r[0].r_offset += 4;
10520 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
10521 r[1].r_offset = r[0].r_offset + 4;
10522 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10523 r[1].r_addend = r[0].r_addend;
10524 if (plt_load_toc)
10525 {
10526 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10527 {
10528 r[2].r_offset = r[1].r_offset + 4;
10529 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO);
10530 r[2].r_addend = r[0].r_addend;
10531 }
10532 else
10533 {
10534 r[2].r_offset = r[1].r_offset + 8 + 8 * use_fake_dep;
10535 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10536 r[2].r_addend = r[0].r_addend + 8;
10537 if (plt_static_chain)
10538 {
10539 r[3].r_offset = r[2].r_offset + 4;
10540 r[3].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10541 r[3].r_addend = r[0].r_addend + 16;
10542 }
10543 }
10544 }
10545 }
10546 if (ALWAYS_EMIT_R2SAVE
10547 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10548 bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p), p += 4;
10549 if (plt_load_toc)
10550 {
10551 bfd_put_32 (obfd, ADDIS_R11_R2 | PPC_HA (offset), p), p += 4;
10552 bfd_put_32 (obfd, LD_R12_0R11 | PPC_LO (offset), p), p += 4;
10553 }
10554 else
10555 {
10556 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
10557 bfd_put_32 (obfd, LD_R12_0R12 | PPC_LO (offset), p), p += 4;
10558 }
10559 if (plt_load_toc
10560 && PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10561 {
10562 bfd_put_32 (obfd, ADDI_R11_R11 | PPC_LO (offset), p), p += 4;
10563 offset = 0;
10564 }
10565 bfd_put_32 (obfd, MTCTR_R12, p), p += 4;
10566 if (plt_load_toc)
10567 {
10568 if (use_fake_dep)
10569 {
10570 bfd_put_32 (obfd, XOR_R2_R12_R12, p), p += 4;
10571 bfd_put_32 (obfd, ADD_R11_R11_R2, p), p += 4;
10572 }
10573 bfd_put_32 (obfd, LD_R2_0R11 | PPC_LO (offset + 8), p), p += 4;
10574 if (plt_static_chain)
10575 bfd_put_32 (obfd, LD_R11_0R11 | PPC_LO (offset + 16), p), p += 4;
10576 }
10577 }
10578 else
10579 {
10580 if (r != NULL)
10581 {
10582 if (ALWAYS_EMIT_R2SAVE
10583 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10584 r[0].r_offset += 4;
10585 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10586 if (plt_load_toc)
10587 {
10588 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10589 {
10590 r[1].r_offset = r[0].r_offset + 4;
10591 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16);
10592 r[1].r_addend = r[0].r_addend;
10593 }
10594 else
10595 {
10596 r[1].r_offset = r[0].r_offset + 8 + 8 * use_fake_dep;
10597 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10598 r[1].r_addend = r[0].r_addend + 8 + 8 * plt_static_chain;
10599 if (plt_static_chain)
10600 {
10601 r[2].r_offset = r[1].r_offset + 4;
10602 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10603 r[2].r_addend = r[0].r_addend + 8;
10604 }
10605 }
10606 }
10607 }
10608 if (ALWAYS_EMIT_R2SAVE
10609 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10610 bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p), p += 4;
10611 bfd_put_32 (obfd, LD_R12_0R2 | PPC_LO (offset), p), p += 4;
10612 if (plt_load_toc
10613 && PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10614 {
10615 bfd_put_32 (obfd, ADDI_R2_R2 | PPC_LO (offset), p), p += 4;
10616 offset = 0;
10617 }
10618 bfd_put_32 (obfd, MTCTR_R12, p), p += 4;
10619 if (plt_load_toc)
10620 {
10621 if (use_fake_dep)
10622 {
10623 bfd_put_32 (obfd, XOR_R11_R12_R12, p), p += 4;
10624 bfd_put_32 (obfd, ADD_R2_R2_R11, p), p += 4;
10625 }
10626 if (plt_static_chain)
10627 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset + 16), p), p += 4;
10628 bfd_put_32 (obfd, LD_R2_0R2 | PPC_LO (offset + 8), p), p += 4;
10629 }
10630 }
10631 if (plt_load_toc && plt_thread_safe && !use_fake_dep)
10632 {
10633 bfd_put_32 (obfd, CMPLDI_R2_0, p), p += 4;
10634 bfd_put_32 (obfd, BNECTR_P4, p), p += 4;
10635 bfd_put_32 (obfd, B_DOT | (cmp_branch_off & 0x3fffffc), p), p += 4;
10636 }
10637 else
10638 bfd_put_32 (obfd, BCTR, p), p += 4;
10639 return p;
10640 }
10641
10642 /* Build a special .plt call stub for __tls_get_addr. */
10643
10644 #define LD_R11_0R3 0xe9630000
10645 #define LD_R12_0R3 0xe9830000
10646 #define MR_R0_R3 0x7c601b78
10647 #define CMPDI_R11_0 0x2c2b0000
10648 #define ADD_R3_R12_R13 0x7c6c6a14
10649 #define BEQLR 0x4d820020
10650 #define MR_R3_R0 0x7c030378
10651 #define STD_R11_0R1 0xf9610000
10652 #define BCTRL 0x4e800421
10653 #define LD_R11_0R1 0xe9610000
10654 #define MTLR_R11 0x7d6803a6
10655
10656 static inline bfd_byte *
10657 build_tls_get_addr_stub (struct ppc_link_hash_table *htab,
10658 struct ppc_stub_hash_entry *stub_entry,
10659 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
10660 {
10661 bfd *obfd = htab->params->stub_bfd;
10662
10663 bfd_put_32 (obfd, LD_R11_0R3 + 0, p), p += 4;
10664 bfd_put_32 (obfd, LD_R12_0R3 + 8, p), p += 4;
10665 bfd_put_32 (obfd, MR_R0_R3, p), p += 4;
10666 bfd_put_32 (obfd, CMPDI_R11_0, p), p += 4;
10667 bfd_put_32 (obfd, ADD_R3_R12_R13, p), p += 4;
10668 bfd_put_32 (obfd, BEQLR, p), p += 4;
10669 bfd_put_32 (obfd, MR_R3_R0, p), p += 4;
10670 bfd_put_32 (obfd, MFLR_R11, p), p += 4;
10671 bfd_put_32 (obfd, STD_R11_0R1 + STK_LINKER (htab), p), p += 4;
10672
10673 if (r != NULL)
10674 r[0].r_offset += 9 * 4;
10675 p = build_plt_stub (htab, stub_entry, p, offset, r);
10676 bfd_put_32 (obfd, BCTRL, p - 4);
10677
10678 bfd_put_32 (obfd, LD_R2_0R1 + STK_TOC (htab), p), p += 4;
10679 bfd_put_32 (obfd, LD_R11_0R1 + STK_LINKER (htab), p), p += 4;
10680 bfd_put_32 (obfd, MTLR_R11, p), p += 4;
10681 bfd_put_32 (obfd, BLR, p), p += 4;
10682
10683 return p;
10684 }
10685
10686 static Elf_Internal_Rela *
10687 get_relocs (asection *sec, int count)
10688 {
10689 Elf_Internal_Rela *relocs;
10690 struct bfd_elf_section_data *elfsec_data;
10691
10692 elfsec_data = elf_section_data (sec);
10693 relocs = elfsec_data->relocs;
10694 if (relocs == NULL)
10695 {
10696 bfd_size_type relsize;
10697 relsize = sec->reloc_count * sizeof (*relocs);
10698 relocs = bfd_alloc (sec->owner, relsize);
10699 if (relocs == NULL)
10700 return NULL;
10701 elfsec_data->relocs = relocs;
10702 elfsec_data->rela.hdr = bfd_zalloc (sec->owner,
10703 sizeof (Elf_Internal_Shdr));
10704 if (elfsec_data->rela.hdr == NULL)
10705 return NULL;
10706 elfsec_data->rela.hdr->sh_size = (sec->reloc_count
10707 * sizeof (Elf64_External_Rela));
10708 elfsec_data->rela.hdr->sh_entsize = sizeof (Elf64_External_Rela);
10709 sec->reloc_count = 0;
10710 }
10711 relocs += sec->reloc_count;
10712 sec->reloc_count += count;
10713 return relocs;
10714 }
10715
10716 static bfd_vma
10717 get_r2off (struct bfd_link_info *info,
10718 struct ppc_stub_hash_entry *stub_entry)
10719 {
10720 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10721 bfd_vma r2off = htab->sec_info[stub_entry->target_section->id].toc_off;
10722
10723 if (r2off == 0)
10724 {
10725 /* Support linking -R objects. Get the toc pointer from the
10726 opd entry. */
10727 char buf[8];
10728 if (!htab->opd_abi)
10729 return r2off;
10730 asection *opd = stub_entry->h->elf.root.u.def.section;
10731 bfd_vma opd_off = stub_entry->h->elf.root.u.def.value;
10732
10733 if (strcmp (opd->name, ".opd") != 0
10734 || opd->reloc_count != 0)
10735 {
10736 info->callbacks->einfo (_("%P: cannot find opd entry toc for `%T'\n"),
10737 stub_entry->h->elf.root.root.string);
10738 bfd_set_error (bfd_error_bad_value);
10739 return (bfd_vma) -1;
10740 }
10741 if (!bfd_get_section_contents (opd->owner, opd, buf, opd_off + 8, 8))
10742 return (bfd_vma) -1;
10743 r2off = bfd_get_64 (opd->owner, buf);
10744 r2off -= elf_gp (info->output_bfd);
10745 }
10746 r2off -= htab->sec_info[stub_entry->group->link_sec->id].toc_off;
10747 return r2off;
10748 }
10749
10750 static bfd_boolean
10751 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
10752 {
10753 struct ppc_stub_hash_entry *stub_entry;
10754 struct ppc_branch_hash_entry *br_entry;
10755 struct bfd_link_info *info;
10756 struct ppc_link_hash_table *htab;
10757 bfd_byte *loc;
10758 bfd_byte *p;
10759 bfd_vma dest, off;
10760 int size;
10761 Elf_Internal_Rela *r;
10762 asection *plt;
10763
10764 /* Massage our args to the form they really have. */
10765 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
10766 info = in_arg;
10767
10768 htab = ppc_hash_table (info);
10769 if (htab == NULL)
10770 return FALSE;
10771
10772 /* Make a note of the offset within the stubs for this entry. */
10773 stub_entry->stub_offset = stub_entry->group->stub_sec->size;
10774 loc = stub_entry->group->stub_sec->contents + stub_entry->stub_offset;
10775
10776 htab->stub_count[stub_entry->stub_type - 1] += 1;
10777 switch (stub_entry->stub_type)
10778 {
10779 case ppc_stub_long_branch:
10780 case ppc_stub_long_branch_r2off:
10781 /* Branches are relative. This is where we are going to. */
10782 dest = (stub_entry->target_value
10783 + stub_entry->target_section->output_offset
10784 + stub_entry->target_section->output_section->vma);
10785 dest += PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
10786 off = dest;
10787
10788 /* And this is where we are coming from. */
10789 off -= (stub_entry->stub_offset
10790 + stub_entry->group->stub_sec->output_offset
10791 + stub_entry->group->stub_sec->output_section->vma);
10792
10793 size = 4;
10794 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
10795 {
10796 bfd_vma r2off = get_r2off (info, stub_entry);
10797
10798 if (r2off == (bfd_vma) -1)
10799 {
10800 htab->stub_error = TRUE;
10801 return FALSE;
10802 }
10803 bfd_put_32 (htab->params->stub_bfd, STD_R2_0R1 + STK_TOC (htab), loc);
10804 loc += 4;
10805 size = 8;
10806 if (PPC_HA (r2off) != 0)
10807 {
10808 bfd_put_32 (htab->params->stub_bfd,
10809 ADDIS_R2_R2 | PPC_HA (r2off), loc);
10810 loc += 4;
10811 size += 4;
10812 }
10813 if (PPC_LO (r2off) != 0)
10814 {
10815 bfd_put_32 (htab->params->stub_bfd,
10816 ADDI_R2_R2 | PPC_LO (r2off), loc);
10817 loc += 4;
10818 size += 4;
10819 }
10820 off -= size - 4;
10821 }
10822 bfd_put_32 (htab->params->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
10823
10824 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
10825 {
10826 info->callbacks->einfo
10827 (_("%P: long branch stub `%s' offset overflow\n"),
10828 stub_entry->root.string);
10829 htab->stub_error = TRUE;
10830 return FALSE;
10831 }
10832
10833 if (info->emitrelocations)
10834 {
10835 r = get_relocs (stub_entry->group->stub_sec, 1);
10836 if (r == NULL)
10837 return FALSE;
10838 r->r_offset = loc - stub_entry->group->stub_sec->contents;
10839 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
10840 r->r_addend = dest;
10841 if (stub_entry->h != NULL)
10842 {
10843 struct elf_link_hash_entry **hashes;
10844 unsigned long symndx;
10845 struct ppc_link_hash_entry *h;
10846
10847 hashes = elf_sym_hashes (htab->params->stub_bfd);
10848 if (hashes == NULL)
10849 {
10850 bfd_size_type hsize;
10851
10852 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
10853 hashes = bfd_zalloc (htab->params->stub_bfd, hsize);
10854 if (hashes == NULL)
10855 return FALSE;
10856 elf_sym_hashes (htab->params->stub_bfd) = hashes;
10857 htab->stub_globals = 1;
10858 }
10859 symndx = htab->stub_globals++;
10860 h = stub_entry->h;
10861 hashes[symndx] = &h->elf;
10862 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
10863 if (h->oh != NULL && h->oh->is_func)
10864 h = ppc_follow_link (h->oh);
10865 if (h->elf.root.u.def.section != stub_entry->target_section)
10866 /* H is an opd symbol. The addend must be zero. */
10867 r->r_addend = 0;
10868 else
10869 {
10870 off = (h->elf.root.u.def.value
10871 + h->elf.root.u.def.section->output_offset
10872 + h->elf.root.u.def.section->output_section->vma);
10873 r->r_addend -= off;
10874 }
10875 }
10876 }
10877 break;
10878
10879 case ppc_stub_plt_branch:
10880 case ppc_stub_plt_branch_r2off:
10881 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
10882 stub_entry->root.string + 9,
10883 FALSE, FALSE);
10884 if (br_entry == NULL)
10885 {
10886 info->callbacks->einfo (_("%P: can't find branch stub `%s'\n"),
10887 stub_entry->root.string);
10888 htab->stub_error = TRUE;
10889 return FALSE;
10890 }
10891
10892 dest = (stub_entry->target_value
10893 + stub_entry->target_section->output_offset
10894 + stub_entry->target_section->output_section->vma);
10895 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
10896 dest += PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
10897
10898 bfd_put_64 (htab->brlt->owner, dest,
10899 htab->brlt->contents + br_entry->offset);
10900
10901 if (br_entry->iter == htab->stub_iteration)
10902 {
10903 br_entry->iter = 0;
10904
10905 if (htab->relbrlt != NULL)
10906 {
10907 /* Create a reloc for the branch lookup table entry. */
10908 Elf_Internal_Rela rela;
10909 bfd_byte *rl;
10910
10911 rela.r_offset = (br_entry->offset
10912 + htab->brlt->output_offset
10913 + htab->brlt->output_section->vma);
10914 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
10915 rela.r_addend = dest;
10916
10917 rl = htab->relbrlt->contents;
10918 rl += (htab->relbrlt->reloc_count++
10919 * sizeof (Elf64_External_Rela));
10920 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
10921 }
10922 else if (info->emitrelocations)
10923 {
10924 r = get_relocs (htab->brlt, 1);
10925 if (r == NULL)
10926 return FALSE;
10927 /* brlt, being SEC_LINKER_CREATED does not go through the
10928 normal reloc processing. Symbols and offsets are not
10929 translated from input file to output file form, so
10930 set up the offset per the output file. */
10931 r->r_offset = (br_entry->offset
10932 + htab->brlt->output_offset
10933 + htab->brlt->output_section->vma);
10934 r->r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
10935 r->r_addend = dest;
10936 }
10937 }
10938
10939 dest = (br_entry->offset
10940 + htab->brlt->output_offset
10941 + htab->brlt->output_section->vma);
10942
10943 off = (dest
10944 - elf_gp (htab->brlt->output_section->owner)
10945 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
10946
10947 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
10948 {
10949 info->callbacks->einfo
10950 (_("%P: linkage table error against `%T'\n"),
10951 stub_entry->root.string);
10952 bfd_set_error (bfd_error_bad_value);
10953 htab->stub_error = TRUE;
10954 return FALSE;
10955 }
10956
10957 if (info->emitrelocations)
10958 {
10959 r = get_relocs (stub_entry->group->stub_sec, 1 + (PPC_HA (off) != 0));
10960 if (r == NULL)
10961 return FALSE;
10962 r[0].r_offset = loc - stub_entry->group->stub_sec->contents;
10963 if (bfd_big_endian (info->output_bfd))
10964 r[0].r_offset += 2;
10965 if (stub_entry->stub_type == ppc_stub_plt_branch_r2off)
10966 r[0].r_offset += 4;
10967 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10968 r[0].r_addend = dest;
10969 if (PPC_HA (off) != 0)
10970 {
10971 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
10972 r[1].r_offset = r[0].r_offset + 4;
10973 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10974 r[1].r_addend = r[0].r_addend;
10975 }
10976 }
10977
10978 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
10979 {
10980 if (PPC_HA (off) != 0)
10981 {
10982 size = 16;
10983 bfd_put_32 (htab->params->stub_bfd,
10984 ADDIS_R12_R2 | PPC_HA (off), loc);
10985 loc += 4;
10986 bfd_put_32 (htab->params->stub_bfd,
10987 LD_R12_0R12 | PPC_LO (off), loc);
10988 }
10989 else
10990 {
10991 size = 12;
10992 bfd_put_32 (htab->params->stub_bfd,
10993 LD_R12_0R2 | PPC_LO (off), loc);
10994 }
10995 }
10996 else
10997 {
10998 bfd_vma r2off = get_r2off (info, stub_entry);
10999
11000 if (r2off == (bfd_vma) -1)
11001 {
11002 htab->stub_error = TRUE;
11003 return FALSE;
11004 }
11005
11006 bfd_put_32 (htab->params->stub_bfd, STD_R2_0R1 + STK_TOC (htab), loc);
11007 loc += 4;
11008 size = 16;
11009 if (PPC_HA (off) != 0)
11010 {
11011 size += 4;
11012 bfd_put_32 (htab->params->stub_bfd,
11013 ADDIS_R12_R2 | PPC_HA (off), loc);
11014 loc += 4;
11015 bfd_put_32 (htab->params->stub_bfd,
11016 LD_R12_0R12 | PPC_LO (off), loc);
11017 }
11018 else
11019 bfd_put_32 (htab->params->stub_bfd, LD_R12_0R2 | PPC_LO (off), loc);
11020
11021 if (PPC_HA (r2off) != 0)
11022 {
11023 size += 4;
11024 loc += 4;
11025 bfd_put_32 (htab->params->stub_bfd,
11026 ADDIS_R2_R2 | PPC_HA (r2off), loc);
11027 }
11028 if (PPC_LO (r2off) != 0)
11029 {
11030 size += 4;
11031 loc += 4;
11032 bfd_put_32 (htab->params->stub_bfd,
11033 ADDI_R2_R2 | PPC_LO (r2off), loc);
11034 }
11035 }
11036 loc += 4;
11037 bfd_put_32 (htab->params->stub_bfd, MTCTR_R12, loc);
11038 loc += 4;
11039 bfd_put_32 (htab->params->stub_bfd, BCTR, loc);
11040 break;
11041
11042 case ppc_stub_plt_call:
11043 case ppc_stub_plt_call_r2save:
11044 if (stub_entry->h != NULL
11045 && stub_entry->h->is_func_descriptor
11046 && stub_entry->h->oh != NULL)
11047 {
11048 struct ppc_link_hash_entry *fh = ppc_follow_link (stub_entry->h->oh);
11049
11050 /* If the old-ABI "dot-symbol" is undefined make it weak so
11051 we don't get a link error from RELOC_FOR_GLOBAL_SYMBOL. */
11052 if (fh->elf.root.type == bfd_link_hash_undefined)
11053 fh->elf.root.type = bfd_link_hash_undefweak;
11054 /* Stop undo_symbol_twiddle changing it back to undefined. */
11055 fh->was_undefined = 0;
11056 }
11057
11058 /* Now build the stub. */
11059 dest = stub_entry->plt_ent->plt.offset & ~1;
11060 if (dest >= (bfd_vma) -2)
11061 abort ();
11062
11063 plt = htab->elf.splt;
11064 if (!htab->elf.dynamic_sections_created
11065 || stub_entry->h == NULL
11066 || stub_entry->h->elf.dynindx == -1)
11067 plt = htab->elf.iplt;
11068
11069 dest += plt->output_offset + plt->output_section->vma;
11070
11071 if (stub_entry->h == NULL
11072 && (stub_entry->plt_ent->plt.offset & 1) == 0)
11073 {
11074 Elf_Internal_Rela rela;
11075 bfd_byte *rl;
11076
11077 rela.r_offset = dest;
11078 if (htab->opd_abi)
11079 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
11080 else
11081 rela.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
11082 rela.r_addend = (stub_entry->target_value
11083 + stub_entry->target_section->output_offset
11084 + stub_entry->target_section->output_section->vma);
11085
11086 rl = (htab->elf.irelplt->contents
11087 + (htab->elf.irelplt->reloc_count++
11088 * sizeof (Elf64_External_Rela)));
11089 bfd_elf64_swap_reloca_out (info->output_bfd, &rela, rl);
11090 stub_entry->plt_ent->plt.offset |= 1;
11091 }
11092
11093 off = (dest
11094 - elf_gp (plt->output_section->owner)
11095 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11096
11097 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
11098 {
11099 info->callbacks->einfo
11100 (_("%P: linkage table error against `%T'\n"),
11101 stub_entry->h != NULL
11102 ? stub_entry->h->elf.root.root.string
11103 : "<local sym>");
11104 bfd_set_error (bfd_error_bad_value);
11105 htab->stub_error = TRUE;
11106 return FALSE;
11107 }
11108
11109 if (htab->params->plt_stub_align != 0)
11110 {
11111 unsigned pad = plt_stub_pad (htab, stub_entry, off);
11112
11113 stub_entry->group->stub_sec->size += pad;
11114 stub_entry->stub_offset = stub_entry->group->stub_sec->size;
11115 loc += pad;
11116 }
11117
11118 r = NULL;
11119 if (info->emitrelocations)
11120 {
11121 r = get_relocs (stub_entry->group->stub_sec,
11122 ((PPC_HA (off) != 0)
11123 + (htab->opd_abi
11124 ? 2 + (htab->params->plt_static_chain
11125 && PPC_HA (off + 16) == PPC_HA (off))
11126 : 1)));
11127 if (r == NULL)
11128 return FALSE;
11129 r[0].r_offset = loc - stub_entry->group->stub_sec->contents;
11130 if (bfd_big_endian (info->output_bfd))
11131 r[0].r_offset += 2;
11132 r[0].r_addend = dest;
11133 }
11134 if (stub_entry->h != NULL
11135 && (stub_entry->h == htab->tls_get_addr_fd
11136 || stub_entry->h == htab->tls_get_addr)
11137 && htab->params->tls_get_addr_opt)
11138 p = build_tls_get_addr_stub (htab, stub_entry, loc, off, r);
11139 else
11140 p = build_plt_stub (htab, stub_entry, loc, off, r);
11141 size = p - loc;
11142 break;
11143
11144 case ppc_stub_save_res:
11145 return TRUE;
11146
11147 default:
11148 BFD_FAIL ();
11149 return FALSE;
11150 }
11151
11152 stub_entry->group->stub_sec->size += size;
11153
11154 if (htab->params->emit_stub_syms)
11155 {
11156 struct elf_link_hash_entry *h;
11157 size_t len1, len2;
11158 char *name;
11159 const char *const stub_str[] = { "long_branch",
11160 "long_branch_r2off",
11161 "plt_branch",
11162 "plt_branch_r2off",
11163 "plt_call",
11164 "plt_call" };
11165
11166 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
11167 len2 = strlen (stub_entry->root.string);
11168 name = bfd_malloc (len1 + len2 + 2);
11169 if (name == NULL)
11170 return FALSE;
11171 memcpy (name, stub_entry->root.string, 9);
11172 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
11173 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
11174 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
11175 if (h == NULL)
11176 return FALSE;
11177 if (h->root.type == bfd_link_hash_new)
11178 {
11179 h->root.type = bfd_link_hash_defined;
11180 h->root.u.def.section = stub_entry->group->stub_sec;
11181 h->root.u.def.value = stub_entry->stub_offset;
11182 h->ref_regular = 1;
11183 h->def_regular = 1;
11184 h->ref_regular_nonweak = 1;
11185 h->forced_local = 1;
11186 h->non_elf = 0;
11187 h->root.linker_def = 1;
11188 }
11189 }
11190
11191 return TRUE;
11192 }
11193
11194 /* As above, but don't actually build the stub. Just bump offset so
11195 we know stub section sizes, and select plt_branch stubs where
11196 long_branch stubs won't do. */
11197
11198 static bfd_boolean
11199 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
11200 {
11201 struct ppc_stub_hash_entry *stub_entry;
11202 struct bfd_link_info *info;
11203 struct ppc_link_hash_table *htab;
11204 bfd_vma off;
11205 int size;
11206
11207 /* Massage our args to the form they really have. */
11208 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
11209 info = in_arg;
11210
11211 htab = ppc_hash_table (info);
11212 if (htab == NULL)
11213 return FALSE;
11214
11215 if (stub_entry->h != NULL
11216 && stub_entry->h->save_res
11217 && stub_entry->h->elf.root.type == bfd_link_hash_defined
11218 && stub_entry->h->elf.root.u.def.section == htab->sfpr)
11219 {
11220 /* Don't make stubs to out-of-line register save/restore
11221 functions. Instead, emit copies of the functions. */
11222 stub_entry->group->needs_save_res = 1;
11223 stub_entry->stub_type = ppc_stub_save_res;
11224 return TRUE;
11225 }
11226
11227 if (stub_entry->stub_type == ppc_stub_plt_call
11228 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
11229 {
11230 asection *plt;
11231 off = stub_entry->plt_ent->plt.offset & ~(bfd_vma) 1;
11232 if (off >= (bfd_vma) -2)
11233 abort ();
11234 plt = htab->elf.splt;
11235 if (!htab->elf.dynamic_sections_created
11236 || stub_entry->h == NULL
11237 || stub_entry->h->elf.dynindx == -1)
11238 plt = htab->elf.iplt;
11239 off += (plt->output_offset
11240 + plt->output_section->vma
11241 - elf_gp (plt->output_section->owner)
11242 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11243
11244 size = plt_stub_size (htab, stub_entry, off);
11245 if (htab->params->plt_stub_align)
11246 size += plt_stub_pad (htab, stub_entry, off);
11247 if (info->emitrelocations)
11248 {
11249 stub_entry->group->stub_sec->reloc_count
11250 += ((PPC_HA (off) != 0)
11251 + (htab->opd_abi
11252 ? 2 + (htab->params->plt_static_chain
11253 && PPC_HA (off + 16) == PPC_HA (off))
11254 : 1));
11255 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11256 }
11257 }
11258 else
11259 {
11260 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
11261 variants. */
11262 bfd_vma r2off = 0;
11263 bfd_vma local_off = 0;
11264
11265 off = (stub_entry->target_value
11266 + stub_entry->target_section->output_offset
11267 + stub_entry->target_section->output_section->vma);
11268 off -= (stub_entry->group->stub_sec->size
11269 + stub_entry->group->stub_sec->output_offset
11270 + stub_entry->group->stub_sec->output_section->vma);
11271
11272 /* Reset the stub type from the plt variant in case we now
11273 can reach with a shorter stub. */
11274 if (stub_entry->stub_type >= ppc_stub_plt_branch)
11275 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
11276
11277 size = 4;
11278 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
11279 {
11280 r2off = get_r2off (info, stub_entry);
11281 if (r2off == (bfd_vma) -1)
11282 {
11283 htab->stub_error = TRUE;
11284 return FALSE;
11285 }
11286 size = 8;
11287 if (PPC_HA (r2off) != 0)
11288 size += 4;
11289 if (PPC_LO (r2off) != 0)
11290 size += 4;
11291 off -= size - 4;
11292 }
11293
11294 local_off = PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
11295
11296 /* If the branch offset if too big, use a ppc_stub_plt_branch.
11297 Do the same for -R objects without function descriptors. */
11298 if (off + (1 << 25) >= (bfd_vma) (1 << 26) - local_off
11299 || (stub_entry->stub_type == ppc_stub_long_branch_r2off
11300 && r2off == 0
11301 && htab->sec_info[stub_entry->target_section->id].toc_off == 0))
11302 {
11303 struct ppc_branch_hash_entry *br_entry;
11304
11305 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
11306 stub_entry->root.string + 9,
11307 TRUE, FALSE);
11308 if (br_entry == NULL)
11309 {
11310 info->callbacks->einfo (_("%P: can't build branch stub `%s'\n"),
11311 stub_entry->root.string);
11312 htab->stub_error = TRUE;
11313 return FALSE;
11314 }
11315
11316 if (br_entry->iter != htab->stub_iteration)
11317 {
11318 br_entry->iter = htab->stub_iteration;
11319 br_entry->offset = htab->brlt->size;
11320 htab->brlt->size += 8;
11321
11322 if (htab->relbrlt != NULL)
11323 htab->relbrlt->size += sizeof (Elf64_External_Rela);
11324 else if (info->emitrelocations)
11325 {
11326 htab->brlt->reloc_count += 1;
11327 htab->brlt->flags |= SEC_RELOC;
11328 }
11329 }
11330
11331 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
11332 off = (br_entry->offset
11333 + htab->brlt->output_offset
11334 + htab->brlt->output_section->vma
11335 - elf_gp (htab->brlt->output_section->owner)
11336 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11337
11338 if (info->emitrelocations)
11339 {
11340 stub_entry->group->stub_sec->reloc_count
11341 += 1 + (PPC_HA (off) != 0);
11342 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11343 }
11344
11345 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
11346 {
11347 size = 12;
11348 if (PPC_HA (off) != 0)
11349 size = 16;
11350 }
11351 else
11352 {
11353 size = 16;
11354 if (PPC_HA (off) != 0)
11355 size += 4;
11356
11357 if (PPC_HA (r2off) != 0)
11358 size += 4;
11359 if (PPC_LO (r2off) != 0)
11360 size += 4;
11361 }
11362 }
11363 else if (info->emitrelocations)
11364 {
11365 stub_entry->group->stub_sec->reloc_count += 1;
11366 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11367 }
11368 }
11369
11370 stub_entry->group->stub_sec->size += size;
11371 return TRUE;
11372 }
11373
11374 /* Set up various things so that we can make a list of input sections
11375 for each output section included in the link. Returns -1 on error,
11376 0 when no stubs will be needed, and 1 on success. */
11377
11378 int
11379 ppc64_elf_setup_section_lists (struct bfd_link_info *info)
11380 {
11381 unsigned int id;
11382 bfd_size_type amt;
11383 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11384
11385 if (htab == NULL)
11386 return -1;
11387
11388 htab->sec_info_arr_size = bfd_get_next_section_id ();
11389 amt = sizeof (*htab->sec_info) * (htab->sec_info_arr_size);
11390 htab->sec_info = bfd_zmalloc (amt);
11391 if (htab->sec_info == NULL)
11392 return -1;
11393
11394 /* Set toc_off for com, und, abs and ind sections. */
11395 for (id = 0; id < 3; id++)
11396 htab->sec_info[id].toc_off = TOC_BASE_OFF;
11397
11398 return 1;
11399 }
11400
11401 /* Set up for first pass at multitoc partitioning. */
11402
11403 void
11404 ppc64_elf_start_multitoc_partition (struct bfd_link_info *info)
11405 {
11406 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11407
11408 htab->toc_curr = ppc64_elf_set_toc (info, info->output_bfd);
11409 htab->toc_bfd = NULL;
11410 htab->toc_first_sec = NULL;
11411 }
11412
11413 /* The linker repeatedly calls this function for each TOC input section
11414 and linker generated GOT section. Group input bfds such that the toc
11415 within a group is less than 64k in size. */
11416
11417 bfd_boolean
11418 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
11419 {
11420 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11421 bfd_vma addr, off, limit;
11422
11423 if (htab == NULL)
11424 return FALSE;
11425
11426 if (!htab->second_toc_pass)
11427 {
11428 /* Keep track of the first .toc or .got section for this input bfd. */
11429 bfd_boolean new_bfd = htab->toc_bfd != isec->owner;
11430
11431 if (new_bfd)
11432 {
11433 htab->toc_bfd = isec->owner;
11434 htab->toc_first_sec = isec;
11435 }
11436
11437 addr = isec->output_offset + isec->output_section->vma;
11438 off = addr - htab->toc_curr;
11439 limit = 0x80008000;
11440 if (ppc64_elf_tdata (isec->owner)->has_small_toc_reloc)
11441 limit = 0x10000;
11442 if (off + isec->size > limit)
11443 {
11444 addr = (htab->toc_first_sec->output_offset
11445 + htab->toc_first_sec->output_section->vma);
11446 htab->toc_curr = addr;
11447 htab->toc_curr &= -TOC_BASE_ALIGN;
11448 }
11449
11450 /* toc_curr is the base address of this toc group. Set elf_gp
11451 for the input section to be the offset relative to the
11452 output toc base plus 0x8000. Making the input elf_gp an
11453 offset allows us to move the toc as a whole without
11454 recalculating input elf_gp. */
11455 off = htab->toc_curr - elf_gp (isec->output_section->owner);
11456 off += TOC_BASE_OFF;
11457
11458 /* Die if someone uses a linker script that doesn't keep input
11459 file .toc and .got together. */
11460 if (new_bfd
11461 && elf_gp (isec->owner) != 0
11462 && elf_gp (isec->owner) != off)
11463 return FALSE;
11464
11465 elf_gp (isec->owner) = off;
11466 return TRUE;
11467 }
11468
11469 /* During the second pass toc_first_sec points to the start of
11470 a toc group, and toc_curr is used to track the old elf_gp.
11471 We use toc_bfd to ensure we only look at each bfd once. */
11472 if (htab->toc_bfd == isec->owner)
11473 return TRUE;
11474 htab->toc_bfd = isec->owner;
11475
11476 if (htab->toc_first_sec == NULL
11477 || htab->toc_curr != elf_gp (isec->owner))
11478 {
11479 htab->toc_curr = elf_gp (isec->owner);
11480 htab->toc_first_sec = isec;
11481 }
11482 addr = (htab->toc_first_sec->output_offset
11483 + htab->toc_first_sec->output_section->vma);
11484 off = addr - elf_gp (isec->output_section->owner) + TOC_BASE_OFF;
11485 elf_gp (isec->owner) = off;
11486
11487 return TRUE;
11488 }
11489
11490 /* Called via elf_link_hash_traverse to merge GOT entries for global
11491 symbol H. */
11492
11493 static bfd_boolean
11494 merge_global_got (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
11495 {
11496 if (h->root.type == bfd_link_hash_indirect)
11497 return TRUE;
11498
11499 merge_got_entries (&h->got.glist);
11500
11501 return TRUE;
11502 }
11503
11504 /* Called via elf_link_hash_traverse to allocate GOT entries for global
11505 symbol H. */
11506
11507 static bfd_boolean
11508 reallocate_got (struct elf_link_hash_entry *h, void *inf)
11509 {
11510 struct got_entry *gent;
11511
11512 if (h->root.type == bfd_link_hash_indirect)
11513 return TRUE;
11514
11515 for (gent = h->got.glist; gent != NULL; gent = gent->next)
11516 if (!gent->is_indirect)
11517 allocate_got (h, (struct bfd_link_info *) inf, gent);
11518 return TRUE;
11519 }
11520
11521 /* Called on the first multitoc pass after the last call to
11522 ppc64_elf_next_toc_section. This function removes duplicate GOT
11523 entries. */
11524
11525 bfd_boolean
11526 ppc64_elf_layout_multitoc (struct bfd_link_info *info)
11527 {
11528 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11529 struct bfd *ibfd, *ibfd2;
11530 bfd_boolean done_something;
11531
11532 htab->multi_toc_needed = htab->toc_curr != elf_gp (info->output_bfd);
11533
11534 if (!htab->do_multi_toc)
11535 return FALSE;
11536
11537 /* Merge global sym got entries within a toc group. */
11538 elf_link_hash_traverse (&htab->elf, merge_global_got, info);
11539
11540 /* And tlsld_got. */
11541 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11542 {
11543 struct got_entry *ent, *ent2;
11544
11545 if (!is_ppc64_elf (ibfd))
11546 continue;
11547
11548 ent = ppc64_tlsld_got (ibfd);
11549 if (!ent->is_indirect
11550 && ent->got.offset != (bfd_vma) -1)
11551 {
11552 for (ibfd2 = ibfd->link.next; ibfd2 != NULL; ibfd2 = ibfd2->link.next)
11553 {
11554 if (!is_ppc64_elf (ibfd2))
11555 continue;
11556
11557 ent2 = ppc64_tlsld_got (ibfd2);
11558 if (!ent2->is_indirect
11559 && ent2->got.offset != (bfd_vma) -1
11560 && elf_gp (ibfd2) == elf_gp (ibfd))
11561 {
11562 ent2->is_indirect = TRUE;
11563 ent2->got.ent = ent;
11564 }
11565 }
11566 }
11567 }
11568
11569 /* Zap sizes of got sections. */
11570 htab->elf.irelplt->rawsize = htab->elf.irelplt->size;
11571 htab->elf.irelplt->size -= htab->got_reli_size;
11572 htab->got_reli_size = 0;
11573
11574 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11575 {
11576 asection *got, *relgot;
11577
11578 if (!is_ppc64_elf (ibfd))
11579 continue;
11580
11581 got = ppc64_elf_tdata (ibfd)->got;
11582 if (got != NULL)
11583 {
11584 got->rawsize = got->size;
11585 got->size = 0;
11586 relgot = ppc64_elf_tdata (ibfd)->relgot;
11587 relgot->rawsize = relgot->size;
11588 relgot->size = 0;
11589 }
11590 }
11591
11592 /* Now reallocate the got, local syms first. We don't need to
11593 allocate section contents again since we never increase size. */
11594 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11595 {
11596 struct got_entry **lgot_ents;
11597 struct got_entry **end_lgot_ents;
11598 struct plt_entry **local_plt;
11599 struct plt_entry **end_local_plt;
11600 unsigned char *lgot_masks;
11601 bfd_size_type locsymcount;
11602 Elf_Internal_Shdr *symtab_hdr;
11603 asection *s;
11604
11605 if (!is_ppc64_elf (ibfd))
11606 continue;
11607
11608 lgot_ents = elf_local_got_ents (ibfd);
11609 if (!lgot_ents)
11610 continue;
11611
11612 symtab_hdr = &elf_symtab_hdr (ibfd);
11613 locsymcount = symtab_hdr->sh_info;
11614 end_lgot_ents = lgot_ents + locsymcount;
11615 local_plt = (struct plt_entry **) end_lgot_ents;
11616 end_local_plt = local_plt + locsymcount;
11617 lgot_masks = (unsigned char *) end_local_plt;
11618 s = ppc64_elf_tdata (ibfd)->got;
11619 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
11620 {
11621 struct got_entry *ent;
11622
11623 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
11624 {
11625 unsigned int ent_size = 8;
11626 unsigned int rel_size = sizeof (Elf64_External_Rela);
11627
11628 ent->got.offset = s->size;
11629 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
11630 {
11631 ent_size *= 2;
11632 rel_size *= 2;
11633 }
11634 s->size += ent_size;
11635 if ((*lgot_masks & PLT_IFUNC) != 0)
11636 {
11637 htab->elf.irelplt->size += rel_size;
11638 htab->got_reli_size += rel_size;
11639 }
11640 else if (bfd_link_pic (info))
11641 {
11642 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
11643 srel->size += rel_size;
11644 }
11645 }
11646 }
11647 }
11648
11649 elf_link_hash_traverse (&htab->elf, reallocate_got, info);
11650
11651 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11652 {
11653 struct got_entry *ent;
11654
11655 if (!is_ppc64_elf (ibfd))
11656 continue;
11657
11658 ent = ppc64_tlsld_got (ibfd);
11659 if (!ent->is_indirect
11660 && ent->got.offset != (bfd_vma) -1)
11661 {
11662 asection *s = ppc64_elf_tdata (ibfd)->got;
11663 ent->got.offset = s->size;
11664 s->size += 16;
11665 if (bfd_link_pic (info))
11666 {
11667 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
11668 srel->size += sizeof (Elf64_External_Rela);
11669 }
11670 }
11671 }
11672
11673 done_something = htab->elf.irelplt->rawsize != htab->elf.irelplt->size;
11674 if (!done_something)
11675 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11676 {
11677 asection *got;
11678
11679 if (!is_ppc64_elf (ibfd))
11680 continue;
11681
11682 got = ppc64_elf_tdata (ibfd)->got;
11683 if (got != NULL)
11684 {
11685 done_something = got->rawsize != got->size;
11686 if (done_something)
11687 break;
11688 }
11689 }
11690
11691 if (done_something)
11692 (*htab->params->layout_sections_again) ();
11693
11694 /* Set up for second pass over toc sections to recalculate elf_gp
11695 on input sections. */
11696 htab->toc_bfd = NULL;
11697 htab->toc_first_sec = NULL;
11698 htab->second_toc_pass = TRUE;
11699 return done_something;
11700 }
11701
11702 /* Called after second pass of multitoc partitioning. */
11703
11704 void
11705 ppc64_elf_finish_multitoc_partition (struct bfd_link_info *info)
11706 {
11707 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11708
11709 /* After the second pass, toc_curr tracks the TOC offset used
11710 for code sections below in ppc64_elf_next_input_section. */
11711 htab->toc_curr = TOC_BASE_OFF;
11712 }
11713
11714 /* No toc references were found in ISEC. If the code in ISEC makes no
11715 calls, then there's no need to use toc adjusting stubs when branching
11716 into ISEC. Actually, indirect calls from ISEC are OK as they will
11717 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
11718 needed, and 2 if a cyclical call-graph was found but no other reason
11719 for a stub was detected. If called from the top level, a return of
11720 2 means the same as a return of 0. */
11721
11722 static int
11723 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
11724 {
11725 int ret;
11726
11727 /* Mark this section as checked. */
11728 isec->call_check_done = 1;
11729
11730 /* We know none of our code bearing sections will need toc stubs. */
11731 if ((isec->flags & SEC_LINKER_CREATED) != 0)
11732 return 0;
11733
11734 if (isec->size == 0)
11735 return 0;
11736
11737 if (isec->output_section == NULL)
11738 return 0;
11739
11740 ret = 0;
11741 if (isec->reloc_count != 0)
11742 {
11743 Elf_Internal_Rela *relstart, *rel;
11744 Elf_Internal_Sym *local_syms;
11745 struct ppc_link_hash_table *htab;
11746
11747 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
11748 info->keep_memory);
11749 if (relstart == NULL)
11750 return -1;
11751
11752 /* Look for branches to outside of this section. */
11753 local_syms = NULL;
11754 htab = ppc_hash_table (info);
11755 if (htab == NULL)
11756 return -1;
11757
11758 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
11759 {
11760 enum elf_ppc64_reloc_type r_type;
11761 unsigned long r_symndx;
11762 struct elf_link_hash_entry *h;
11763 struct ppc_link_hash_entry *eh;
11764 Elf_Internal_Sym *sym;
11765 asection *sym_sec;
11766 struct _opd_sec_data *opd;
11767 bfd_vma sym_value;
11768 bfd_vma dest;
11769
11770 r_type = ELF64_R_TYPE (rel->r_info);
11771 if (r_type != R_PPC64_REL24
11772 && r_type != R_PPC64_REL14
11773 && r_type != R_PPC64_REL14_BRTAKEN
11774 && r_type != R_PPC64_REL14_BRNTAKEN)
11775 continue;
11776
11777 r_symndx = ELF64_R_SYM (rel->r_info);
11778 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
11779 isec->owner))
11780 {
11781 ret = -1;
11782 break;
11783 }
11784
11785 /* Calls to dynamic lib functions go through a plt call stub
11786 that uses r2. */
11787 eh = (struct ppc_link_hash_entry *) h;
11788 if (eh != NULL
11789 && (eh->elf.plt.plist != NULL
11790 || (eh->oh != NULL
11791 && ppc_follow_link (eh->oh)->elf.plt.plist != NULL)))
11792 {
11793 ret = 1;
11794 break;
11795 }
11796
11797 if (sym_sec == NULL)
11798 /* Ignore other undefined symbols. */
11799 continue;
11800
11801 /* Assume branches to other sections not included in the
11802 link need stubs too, to cover -R and absolute syms. */
11803 if (sym_sec->output_section == NULL)
11804 {
11805 ret = 1;
11806 break;
11807 }
11808
11809 if (h == NULL)
11810 sym_value = sym->st_value;
11811 else
11812 {
11813 if (h->root.type != bfd_link_hash_defined
11814 && h->root.type != bfd_link_hash_defweak)
11815 abort ();
11816 sym_value = h->root.u.def.value;
11817 }
11818 sym_value += rel->r_addend;
11819
11820 /* If this branch reloc uses an opd sym, find the code section. */
11821 opd = get_opd_info (sym_sec);
11822 if (opd != NULL)
11823 {
11824 if (h == NULL && opd->adjust != NULL)
11825 {
11826 long adjust;
11827
11828 adjust = opd->adjust[OPD_NDX (sym_value)];
11829 if (adjust == -1)
11830 /* Assume deleted functions won't ever be called. */
11831 continue;
11832 sym_value += adjust;
11833 }
11834
11835 dest = opd_entry_value (sym_sec, sym_value,
11836 &sym_sec, NULL, FALSE);
11837 if (dest == (bfd_vma) -1)
11838 continue;
11839 }
11840 else
11841 dest = (sym_value
11842 + sym_sec->output_offset
11843 + sym_sec->output_section->vma);
11844
11845 /* Ignore branch to self. */
11846 if (sym_sec == isec)
11847 continue;
11848
11849 /* If the called function uses the toc, we need a stub. */
11850 if (sym_sec->has_toc_reloc
11851 || sym_sec->makes_toc_func_call)
11852 {
11853 ret = 1;
11854 break;
11855 }
11856
11857 /* Assume any branch that needs a long branch stub might in fact
11858 need a plt_branch stub. A plt_branch stub uses r2. */
11859 else if (dest - (isec->output_offset
11860 + isec->output_section->vma
11861 + rel->r_offset) + (1 << 25)
11862 >= (2u << 25) - PPC64_LOCAL_ENTRY_OFFSET (h
11863 ? h->other
11864 : sym->st_other))
11865 {
11866 ret = 1;
11867 break;
11868 }
11869
11870 /* If calling back to a section in the process of being
11871 tested, we can't say for sure that no toc adjusting stubs
11872 are needed, so don't return zero. */
11873 else if (sym_sec->call_check_in_progress)
11874 ret = 2;
11875
11876 /* Branches to another section that itself doesn't have any TOC
11877 references are OK. Recursively call ourselves to check. */
11878 else if (!sym_sec->call_check_done)
11879 {
11880 int recur;
11881
11882 /* Mark current section as indeterminate, so that other
11883 sections that call back to current won't be marked as
11884 known. */
11885 isec->call_check_in_progress = 1;
11886 recur = toc_adjusting_stub_needed (info, sym_sec);
11887 isec->call_check_in_progress = 0;
11888
11889 if (recur != 0)
11890 {
11891 ret = recur;
11892 if (recur != 2)
11893 break;
11894 }
11895 }
11896 }
11897
11898 if (local_syms != NULL
11899 && (elf_symtab_hdr (isec->owner).contents
11900 != (unsigned char *) local_syms))
11901 free (local_syms);
11902 if (elf_section_data (isec)->relocs != relstart)
11903 free (relstart);
11904 }
11905
11906 if ((ret & 1) == 0
11907 && isec->map_head.s != NULL
11908 && (strcmp (isec->output_section->name, ".init") == 0
11909 || strcmp (isec->output_section->name, ".fini") == 0))
11910 {
11911 if (isec->map_head.s->has_toc_reloc
11912 || isec->map_head.s->makes_toc_func_call)
11913 ret = 1;
11914 else if (!isec->map_head.s->call_check_done)
11915 {
11916 int recur;
11917 isec->call_check_in_progress = 1;
11918 recur = toc_adjusting_stub_needed (info, isec->map_head.s);
11919 isec->call_check_in_progress = 0;
11920 if (recur != 0)
11921 ret = recur;
11922 }
11923 }
11924
11925 if (ret == 1)
11926 isec->makes_toc_func_call = 1;
11927
11928 return ret;
11929 }
11930
11931 /* The linker repeatedly calls this function for each input section,
11932 in the order that input sections are linked into output sections.
11933 Build lists of input sections to determine groupings between which
11934 we may insert linker stubs. */
11935
11936 bfd_boolean
11937 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
11938 {
11939 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11940
11941 if (htab == NULL)
11942 return FALSE;
11943
11944 if ((isec->output_section->flags & SEC_CODE) != 0
11945 && isec->output_section->id < htab->sec_info_arr_size)
11946 {
11947 /* This happens to make the list in reverse order,
11948 which is what we want. */
11949 htab->sec_info[isec->id].u.list
11950 = htab->sec_info[isec->output_section->id].u.list;
11951 htab->sec_info[isec->output_section->id].u.list = isec;
11952 }
11953
11954 if (htab->multi_toc_needed)
11955 {
11956 /* Analyse sections that aren't already flagged as needing a
11957 valid toc pointer. Exclude .fixup for the linux kernel.
11958 .fixup contains branches, but only back to the function that
11959 hit an exception. */
11960 if (!(isec->has_toc_reloc
11961 || (isec->flags & SEC_CODE) == 0
11962 || strcmp (isec->name, ".fixup") == 0
11963 || isec->call_check_done))
11964 {
11965 if (toc_adjusting_stub_needed (info, isec) < 0)
11966 return FALSE;
11967 }
11968 /* Make all sections use the TOC assigned for this object file.
11969 This will be wrong for pasted sections; We fix that in
11970 check_pasted_section(). */
11971 if (elf_gp (isec->owner) != 0)
11972 htab->toc_curr = elf_gp (isec->owner);
11973 }
11974
11975 htab->sec_info[isec->id].toc_off = htab->toc_curr;
11976 return TRUE;
11977 }
11978
11979 /* Check that all .init and .fini sections use the same toc, if they
11980 have toc relocs. */
11981
11982 static bfd_boolean
11983 check_pasted_section (struct bfd_link_info *info, const char *name)
11984 {
11985 asection *o = bfd_get_section_by_name (info->output_bfd, name);
11986
11987 if (o != NULL)
11988 {
11989 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11990 bfd_vma toc_off = 0;
11991 asection *i;
11992
11993 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
11994 if (i->has_toc_reloc)
11995 {
11996 if (toc_off == 0)
11997 toc_off = htab->sec_info[i->id].toc_off;
11998 else if (toc_off != htab->sec_info[i->id].toc_off)
11999 return FALSE;
12000 }
12001
12002 if (toc_off == 0)
12003 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
12004 if (i->makes_toc_func_call)
12005 {
12006 toc_off = htab->sec_info[i->id].toc_off;
12007 break;
12008 }
12009
12010 /* Make sure the whole pasted function uses the same toc offset. */
12011 if (toc_off != 0)
12012 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
12013 htab->sec_info[i->id].toc_off = toc_off;
12014 }
12015 return TRUE;
12016 }
12017
12018 bfd_boolean
12019 ppc64_elf_check_init_fini (struct bfd_link_info *info)
12020 {
12021 return (check_pasted_section (info, ".init")
12022 & check_pasted_section (info, ".fini"));
12023 }
12024
12025 /* See whether we can group stub sections together. Grouping stub
12026 sections may result in fewer stubs. More importantly, we need to
12027 put all .init* and .fini* stubs at the beginning of the .init or
12028 .fini output sections respectively, because glibc splits the
12029 _init and _fini functions into multiple parts. Putting a stub in
12030 the middle of a function is not a good idea. */
12031
12032 static bfd_boolean
12033 group_sections (struct bfd_link_info *info,
12034 bfd_size_type stub_group_size,
12035 bfd_boolean stubs_always_before_branch)
12036 {
12037 struct ppc_link_hash_table *htab;
12038 asection *osec;
12039 bfd_size_type stub14_group_size;
12040 bfd_boolean suppress_size_errors;
12041
12042 htab = ppc_hash_table (info);
12043 if (htab == NULL)
12044 return FALSE;
12045
12046 suppress_size_errors = FALSE;
12047 stub14_group_size = stub_group_size >> 10;
12048 if (stub_group_size == 1)
12049 {
12050 /* Default values. */
12051 if (stubs_always_before_branch)
12052 {
12053 stub_group_size = 0x1e00000;
12054 stub14_group_size = 0x7800;
12055 }
12056 else
12057 {
12058 stub_group_size = 0x1c00000;
12059 stub14_group_size = 0x7000;
12060 }
12061 suppress_size_errors = TRUE;
12062 }
12063
12064 for (osec = info->output_bfd->sections; osec != NULL; osec = osec->next)
12065 {
12066 asection *tail;
12067
12068 if (osec->id >= htab->sec_info_arr_size)
12069 continue;
12070
12071 tail = htab->sec_info[osec->id].u.list;
12072 while (tail != NULL)
12073 {
12074 asection *curr;
12075 asection *prev;
12076 bfd_size_type total;
12077 bfd_boolean big_sec;
12078 bfd_vma curr_toc;
12079 struct map_stub *group;
12080
12081 curr = tail;
12082 total = tail->size;
12083 big_sec = total > (ppc64_elf_section_data (tail) != NULL
12084 && ppc64_elf_section_data (tail)->has_14bit_branch
12085 ? stub14_group_size : stub_group_size);
12086 if (big_sec && !suppress_size_errors)
12087 (*_bfd_error_handler) (_("%B section %A exceeds stub group size"),
12088 tail->owner, tail);
12089 curr_toc = htab->sec_info[tail->id].toc_off;
12090
12091 while ((prev = htab->sec_info[curr->id].u.list) != NULL
12092 && ((total += curr->output_offset - prev->output_offset)
12093 < (ppc64_elf_section_data (prev) != NULL
12094 && ppc64_elf_section_data (prev)->has_14bit_branch
12095 ? stub14_group_size : stub_group_size))
12096 && htab->sec_info[prev->id].toc_off == curr_toc)
12097 curr = prev;
12098
12099 /* OK, the size from the start of CURR to the end is less
12100 than stub_group_size and thus can be handled by one stub
12101 section. (or the tail section is itself larger than
12102 stub_group_size, in which case we may be toast.) We
12103 should really be keeping track of the total size of stubs
12104 added here, as stubs contribute to the final output
12105 section size. That's a little tricky, and this way will
12106 only break if stubs added make the total size more than
12107 2^25, ie. for the default stub_group_size, if stubs total
12108 more than 2097152 bytes, or nearly 75000 plt call stubs. */
12109 group = bfd_alloc (curr->owner, sizeof (*group));
12110 if (group == NULL)
12111 return FALSE;
12112 group->link_sec = curr;
12113 group->stub_sec = NULL;
12114 group->needs_save_res = 0;
12115 group->next = htab->group;
12116 htab->group = group;
12117 do
12118 {
12119 prev = htab->sec_info[tail->id].u.list;
12120 /* Set up this stub group. */
12121 htab->sec_info[tail->id].u.group = group;
12122 }
12123 while (tail != curr && (tail = prev) != NULL);
12124
12125 /* But wait, there's more! Input sections up to stub_group_size
12126 bytes before the stub section can be handled by it too.
12127 Don't do this if we have a really large section after the
12128 stubs, as adding more stubs increases the chance that
12129 branches may not reach into the stub section. */
12130 if (!stubs_always_before_branch && !big_sec)
12131 {
12132 total = 0;
12133 while (prev != NULL
12134 && ((total += tail->output_offset - prev->output_offset)
12135 < (ppc64_elf_section_data (prev) != NULL
12136 && ppc64_elf_section_data (prev)->has_14bit_branch
12137 ? stub14_group_size : stub_group_size))
12138 && htab->sec_info[prev->id].toc_off == curr_toc)
12139 {
12140 tail = prev;
12141 prev = htab->sec_info[tail->id].u.list;
12142 htab->sec_info[tail->id].u.group = group;
12143 }
12144 }
12145 tail = prev;
12146 }
12147 }
12148 return TRUE;
12149 }
12150
12151 static const unsigned char glink_eh_frame_cie[] =
12152 {
12153 0, 0, 0, 16, /* length. */
12154 0, 0, 0, 0, /* id. */
12155 1, /* CIE version. */
12156 'z', 'R', 0, /* Augmentation string. */
12157 4, /* Code alignment. */
12158 0x78, /* Data alignment. */
12159 65, /* RA reg. */
12160 1, /* Augmentation size. */
12161 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
12162 DW_CFA_def_cfa, 1, 0, /* def_cfa: r1 offset 0. */
12163 0, 0, 0, 0
12164 };
12165
12166 /* Stripping output sections is normally done before dynamic section
12167 symbols have been allocated. This function is called later, and
12168 handles cases like htab->brlt which is mapped to its own output
12169 section. */
12170
12171 static void
12172 maybe_strip_output (struct bfd_link_info *info, asection *isec)
12173 {
12174 if (isec->size == 0
12175 && isec->output_section->size == 0
12176 && !(isec->output_section->flags & SEC_KEEP)
12177 && !bfd_section_removed_from_list (info->output_bfd,
12178 isec->output_section)
12179 && elf_section_data (isec->output_section)->dynindx == 0)
12180 {
12181 isec->output_section->flags |= SEC_EXCLUDE;
12182 bfd_section_list_remove (info->output_bfd, isec->output_section);
12183 info->output_bfd->section_count--;
12184 }
12185 }
12186
12187 /* Determine and set the size of the stub section for a final link.
12188
12189 The basic idea here is to examine all the relocations looking for
12190 PC-relative calls to a target that is unreachable with a "bl"
12191 instruction. */
12192
12193 bfd_boolean
12194 ppc64_elf_size_stubs (struct bfd_link_info *info)
12195 {
12196 bfd_size_type stub_group_size;
12197 bfd_boolean stubs_always_before_branch;
12198 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12199
12200 if (htab == NULL)
12201 return FALSE;
12202
12203 if (htab->params->plt_thread_safe == -1 && !bfd_link_executable (info))
12204 htab->params->plt_thread_safe = 1;
12205 if (!htab->opd_abi)
12206 htab->params->plt_thread_safe = 0;
12207 else if (htab->params->plt_thread_safe == -1)
12208 {
12209 static const char *const thread_starter[] =
12210 {
12211 "pthread_create",
12212 /* libstdc++ */
12213 "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE",
12214 /* librt */
12215 "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio",
12216 "mq_notify", "create_timer",
12217 /* libanl */
12218 "getaddrinfo_a",
12219 /* libgomp */
12220 "GOMP_parallel",
12221 "GOMP_parallel_start",
12222 "GOMP_parallel_loop_static",
12223 "GOMP_parallel_loop_static_start",
12224 "GOMP_parallel_loop_dynamic",
12225 "GOMP_parallel_loop_dynamic_start",
12226 "GOMP_parallel_loop_guided",
12227 "GOMP_parallel_loop_guided_start",
12228 "GOMP_parallel_loop_runtime",
12229 "GOMP_parallel_loop_runtime_start",
12230 "GOMP_parallel_sections",
12231 "GOMP_parallel_sections_start",
12232 /* libgo */
12233 "__go_go",
12234 };
12235 unsigned i;
12236
12237 for (i = 0; i < ARRAY_SIZE (thread_starter); i++)
12238 {
12239 struct elf_link_hash_entry *h;
12240 h = elf_link_hash_lookup (&htab->elf, thread_starter[i],
12241 FALSE, FALSE, TRUE);
12242 htab->params->plt_thread_safe = h != NULL && h->ref_regular;
12243 if (htab->params->plt_thread_safe)
12244 break;
12245 }
12246 }
12247 stubs_always_before_branch = htab->params->group_size < 0;
12248 if (htab->params->group_size < 0)
12249 stub_group_size = -htab->params->group_size;
12250 else
12251 stub_group_size = htab->params->group_size;
12252
12253 if (!group_sections (info, stub_group_size, stubs_always_before_branch))
12254 return FALSE;
12255
12256 #define STUB_SHRINK_ITER 20
12257 /* Loop until no stubs added. After iteration 20 of this loop we may
12258 exit on a stub section shrinking. This is to break out of a
12259 pathological case where adding stubs on one iteration decreases
12260 section gaps (perhaps due to alignment), which then requires
12261 fewer or smaller stubs on the next iteration. */
12262
12263 while (1)
12264 {
12265 bfd *input_bfd;
12266 unsigned int bfd_indx;
12267 struct map_stub *group;
12268 asection *stub_sec;
12269
12270 htab->stub_iteration += 1;
12271
12272 for (input_bfd = info->input_bfds, bfd_indx = 0;
12273 input_bfd != NULL;
12274 input_bfd = input_bfd->link.next, bfd_indx++)
12275 {
12276 Elf_Internal_Shdr *symtab_hdr;
12277 asection *section;
12278 Elf_Internal_Sym *local_syms = NULL;
12279
12280 if (!is_ppc64_elf (input_bfd))
12281 continue;
12282
12283 /* We'll need the symbol table in a second. */
12284 symtab_hdr = &elf_symtab_hdr (input_bfd);
12285 if (symtab_hdr->sh_info == 0)
12286 continue;
12287
12288 /* Walk over each section attached to the input bfd. */
12289 for (section = input_bfd->sections;
12290 section != NULL;
12291 section = section->next)
12292 {
12293 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
12294
12295 /* If there aren't any relocs, then there's nothing more
12296 to do. */
12297 if ((section->flags & SEC_RELOC) == 0
12298 || (section->flags & SEC_ALLOC) == 0
12299 || (section->flags & SEC_LOAD) == 0
12300 || (section->flags & SEC_CODE) == 0
12301 || section->reloc_count == 0)
12302 continue;
12303
12304 /* If this section is a link-once section that will be
12305 discarded, then don't create any stubs. */
12306 if (section->output_section == NULL
12307 || section->output_section->owner != info->output_bfd)
12308 continue;
12309
12310 /* Get the relocs. */
12311 internal_relocs
12312 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
12313 info->keep_memory);
12314 if (internal_relocs == NULL)
12315 goto error_ret_free_local;
12316
12317 /* Now examine each relocation. */
12318 irela = internal_relocs;
12319 irelaend = irela + section->reloc_count;
12320 for (; irela < irelaend; irela++)
12321 {
12322 enum elf_ppc64_reloc_type r_type;
12323 unsigned int r_indx;
12324 enum ppc_stub_type stub_type;
12325 struct ppc_stub_hash_entry *stub_entry;
12326 asection *sym_sec, *code_sec;
12327 bfd_vma sym_value, code_value;
12328 bfd_vma destination;
12329 unsigned long local_off;
12330 bfd_boolean ok_dest;
12331 struct ppc_link_hash_entry *hash;
12332 struct ppc_link_hash_entry *fdh;
12333 struct elf_link_hash_entry *h;
12334 Elf_Internal_Sym *sym;
12335 char *stub_name;
12336 const asection *id_sec;
12337 struct _opd_sec_data *opd;
12338 struct plt_entry *plt_ent;
12339
12340 r_type = ELF64_R_TYPE (irela->r_info);
12341 r_indx = ELF64_R_SYM (irela->r_info);
12342
12343 if (r_type >= R_PPC64_max)
12344 {
12345 bfd_set_error (bfd_error_bad_value);
12346 goto error_ret_free_internal;
12347 }
12348
12349 /* Only look for stubs on branch instructions. */
12350 if (r_type != R_PPC64_REL24
12351 && r_type != R_PPC64_REL14
12352 && r_type != R_PPC64_REL14_BRTAKEN
12353 && r_type != R_PPC64_REL14_BRNTAKEN)
12354 continue;
12355
12356 /* Now determine the call target, its name, value,
12357 section. */
12358 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
12359 r_indx, input_bfd))
12360 goto error_ret_free_internal;
12361 hash = (struct ppc_link_hash_entry *) h;
12362
12363 ok_dest = FALSE;
12364 fdh = NULL;
12365 sym_value = 0;
12366 if (hash == NULL)
12367 {
12368 sym_value = sym->st_value;
12369 if (sym_sec != NULL
12370 && sym_sec->output_section != NULL)
12371 ok_dest = TRUE;
12372 }
12373 else if (hash->elf.root.type == bfd_link_hash_defined
12374 || hash->elf.root.type == bfd_link_hash_defweak)
12375 {
12376 sym_value = hash->elf.root.u.def.value;
12377 if (sym_sec->output_section != NULL)
12378 ok_dest = TRUE;
12379 }
12380 else if (hash->elf.root.type == bfd_link_hash_undefweak
12381 || hash->elf.root.type == bfd_link_hash_undefined)
12382 {
12383 /* Recognise an old ABI func code entry sym, and
12384 use the func descriptor sym instead if it is
12385 defined. */
12386 if (hash->elf.root.root.string[0] == '.'
12387 && (fdh = lookup_fdh (hash, htab)) != NULL)
12388 {
12389 if (fdh->elf.root.type == bfd_link_hash_defined
12390 || fdh->elf.root.type == bfd_link_hash_defweak)
12391 {
12392 sym_sec = fdh->elf.root.u.def.section;
12393 sym_value = fdh->elf.root.u.def.value;
12394 if (sym_sec->output_section != NULL)
12395 ok_dest = TRUE;
12396 }
12397 else
12398 fdh = NULL;
12399 }
12400 }
12401 else
12402 {
12403 bfd_set_error (bfd_error_bad_value);
12404 goto error_ret_free_internal;
12405 }
12406
12407 destination = 0;
12408 local_off = 0;
12409 if (ok_dest)
12410 {
12411 sym_value += irela->r_addend;
12412 destination = (sym_value
12413 + sym_sec->output_offset
12414 + sym_sec->output_section->vma);
12415 local_off = PPC64_LOCAL_ENTRY_OFFSET (hash
12416 ? hash->elf.other
12417 : sym->st_other);
12418 }
12419
12420 code_sec = sym_sec;
12421 code_value = sym_value;
12422 opd = get_opd_info (sym_sec);
12423 if (opd != NULL)
12424 {
12425 bfd_vma dest;
12426
12427 if (hash == NULL && opd->adjust != NULL)
12428 {
12429 long adjust = opd->adjust[OPD_NDX (sym_value)];
12430 if (adjust == -1)
12431 continue;
12432 code_value += adjust;
12433 sym_value += adjust;
12434 }
12435 dest = opd_entry_value (sym_sec, sym_value,
12436 &code_sec, &code_value, FALSE);
12437 if (dest != (bfd_vma) -1)
12438 {
12439 destination = dest;
12440 if (fdh != NULL)
12441 {
12442 /* Fixup old ABI sym to point at code
12443 entry. */
12444 hash->elf.root.type = bfd_link_hash_defweak;
12445 hash->elf.root.u.def.section = code_sec;
12446 hash->elf.root.u.def.value = code_value;
12447 }
12448 }
12449 }
12450
12451 /* Determine what (if any) linker stub is needed. */
12452 plt_ent = NULL;
12453 stub_type = ppc_type_of_stub (section, irela, &hash,
12454 &plt_ent, destination,
12455 local_off);
12456
12457 if (stub_type != ppc_stub_plt_call)
12458 {
12459 /* Check whether we need a TOC adjusting stub.
12460 Since the linker pastes together pieces from
12461 different object files when creating the
12462 _init and _fini functions, it may be that a
12463 call to what looks like a local sym is in
12464 fact a call needing a TOC adjustment. */
12465 if (code_sec != NULL
12466 && code_sec->output_section != NULL
12467 && (htab->sec_info[code_sec->id].toc_off
12468 != htab->sec_info[section->id].toc_off)
12469 && (code_sec->has_toc_reloc
12470 || code_sec->makes_toc_func_call))
12471 stub_type = ppc_stub_long_branch_r2off;
12472 }
12473
12474 if (stub_type == ppc_stub_none)
12475 continue;
12476
12477 /* __tls_get_addr calls might be eliminated. */
12478 if (stub_type != ppc_stub_plt_call
12479 && hash != NULL
12480 && (hash == htab->tls_get_addr
12481 || hash == htab->tls_get_addr_fd)
12482 && section->has_tls_reloc
12483 && irela != internal_relocs)
12484 {
12485 /* Get tls info. */
12486 unsigned char *tls_mask;
12487
12488 if (!get_tls_mask (&tls_mask, NULL, NULL, &local_syms,
12489 irela - 1, input_bfd))
12490 goto error_ret_free_internal;
12491 if (*tls_mask != 0)
12492 continue;
12493 }
12494
12495 if (stub_type == ppc_stub_plt_call
12496 && irela + 1 < irelaend
12497 && irela[1].r_offset == irela->r_offset + 4
12498 && ELF64_R_TYPE (irela[1].r_info) == R_PPC64_TOCSAVE)
12499 {
12500 if (!tocsave_find (htab, INSERT,
12501 &local_syms, irela + 1, input_bfd))
12502 goto error_ret_free_internal;
12503 }
12504 else if (stub_type == ppc_stub_plt_call)
12505 stub_type = ppc_stub_plt_call_r2save;
12506
12507 /* Support for grouping stub sections. */
12508 id_sec = htab->sec_info[section->id].u.group->link_sec;
12509
12510 /* Get the name of this stub. */
12511 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
12512 if (!stub_name)
12513 goto error_ret_free_internal;
12514
12515 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
12516 stub_name, FALSE, FALSE);
12517 if (stub_entry != NULL)
12518 {
12519 /* The proper stub has already been created. */
12520 free (stub_name);
12521 if (stub_type == ppc_stub_plt_call_r2save)
12522 stub_entry->stub_type = stub_type;
12523 continue;
12524 }
12525
12526 stub_entry = ppc_add_stub (stub_name, section, info);
12527 if (stub_entry == NULL)
12528 {
12529 free (stub_name);
12530 error_ret_free_internal:
12531 if (elf_section_data (section)->relocs == NULL)
12532 free (internal_relocs);
12533 error_ret_free_local:
12534 if (local_syms != NULL
12535 && (symtab_hdr->contents
12536 != (unsigned char *) local_syms))
12537 free (local_syms);
12538 return FALSE;
12539 }
12540
12541 stub_entry->stub_type = stub_type;
12542 if (stub_type != ppc_stub_plt_call
12543 && stub_type != ppc_stub_plt_call_r2save)
12544 {
12545 stub_entry->target_value = code_value;
12546 stub_entry->target_section = code_sec;
12547 }
12548 else
12549 {
12550 stub_entry->target_value = sym_value;
12551 stub_entry->target_section = sym_sec;
12552 }
12553 stub_entry->h = hash;
12554 stub_entry->plt_ent = plt_ent;
12555 stub_entry->other = hash ? hash->elf.other : sym->st_other;
12556
12557 if (stub_entry->h != NULL)
12558 htab->stub_globals += 1;
12559 }
12560
12561 /* We're done with the internal relocs, free them. */
12562 if (elf_section_data (section)->relocs != internal_relocs)
12563 free (internal_relocs);
12564 }
12565
12566 if (local_syms != NULL
12567 && symtab_hdr->contents != (unsigned char *) local_syms)
12568 {
12569 if (!info->keep_memory)
12570 free (local_syms);
12571 else
12572 symtab_hdr->contents = (unsigned char *) local_syms;
12573 }
12574 }
12575
12576 /* We may have added some stubs. Find out the new size of the
12577 stub sections. */
12578 for (stub_sec = htab->params->stub_bfd->sections;
12579 stub_sec != NULL;
12580 stub_sec = stub_sec->next)
12581 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12582 {
12583 stub_sec->rawsize = stub_sec->size;
12584 stub_sec->size = 0;
12585 stub_sec->reloc_count = 0;
12586 stub_sec->flags &= ~SEC_RELOC;
12587 }
12588
12589 htab->brlt->size = 0;
12590 htab->brlt->reloc_count = 0;
12591 htab->brlt->flags &= ~SEC_RELOC;
12592 if (htab->relbrlt != NULL)
12593 htab->relbrlt->size = 0;
12594
12595 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
12596
12597 for (group = htab->group; group != NULL; group = group->next)
12598 if (group->needs_save_res)
12599 group->stub_sec->size += htab->sfpr->size;
12600
12601 if (info->emitrelocations
12602 && htab->glink != NULL && htab->glink->size != 0)
12603 {
12604 htab->glink->reloc_count = 1;
12605 htab->glink->flags |= SEC_RELOC;
12606 }
12607
12608 if (htab->glink_eh_frame != NULL
12609 && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
12610 && htab->glink_eh_frame->output_section->size != 0)
12611 {
12612 size_t size = 0, align;
12613
12614 for (stub_sec = htab->params->stub_bfd->sections;
12615 stub_sec != NULL;
12616 stub_sec = stub_sec->next)
12617 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12618 size += 24;
12619 if (htab->glink != NULL && htab->glink->size != 0)
12620 size += 24;
12621 if (size != 0)
12622 size += sizeof (glink_eh_frame_cie);
12623 align = 1;
12624 align <<= htab->glink_eh_frame->output_section->alignment_power;
12625 align -= 1;
12626 size = (size + align) & ~align;
12627 htab->glink_eh_frame->rawsize = htab->glink_eh_frame->size;
12628 htab->glink_eh_frame->size = size;
12629 }
12630
12631 if (htab->params->plt_stub_align != 0)
12632 for (stub_sec = htab->params->stub_bfd->sections;
12633 stub_sec != NULL;
12634 stub_sec = stub_sec->next)
12635 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12636 stub_sec->size = ((stub_sec->size
12637 + (1 << htab->params->plt_stub_align) - 1)
12638 & -(1 << htab->params->plt_stub_align));
12639
12640 for (stub_sec = htab->params->stub_bfd->sections;
12641 stub_sec != NULL;
12642 stub_sec = stub_sec->next)
12643 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
12644 && stub_sec->rawsize != stub_sec->size
12645 && (htab->stub_iteration <= STUB_SHRINK_ITER
12646 || stub_sec->rawsize < stub_sec->size))
12647 break;
12648
12649 if (stub_sec == NULL
12650 && (htab->glink_eh_frame == NULL
12651 || htab->glink_eh_frame->rawsize == htab->glink_eh_frame->size))
12652 break;
12653
12654 /* Ask the linker to do its stuff. */
12655 (*htab->params->layout_sections_again) ();
12656 }
12657
12658 if (htab->glink_eh_frame != NULL
12659 && htab->glink_eh_frame->size != 0)
12660 {
12661 bfd_vma val;
12662 bfd_byte *p, *last_fde;
12663 size_t last_fde_len, size, align, pad;
12664 asection *stub_sec;
12665
12666 p = bfd_zalloc (htab->glink_eh_frame->owner, htab->glink_eh_frame->size);
12667 if (p == NULL)
12668 return FALSE;
12669 htab->glink_eh_frame->contents = p;
12670 last_fde = p;
12671
12672 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
12673 /* CIE length (rewrite in case little-endian). */
12674 last_fde_len = sizeof (glink_eh_frame_cie) - 4;
12675 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
12676 p += sizeof (glink_eh_frame_cie);
12677
12678 for (stub_sec = htab->params->stub_bfd->sections;
12679 stub_sec != NULL;
12680 stub_sec = stub_sec->next)
12681 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12682 {
12683 last_fde = p;
12684 last_fde_len = 20;
12685 /* FDE length. */
12686 bfd_put_32 (htab->elf.dynobj, 20, p);
12687 p += 4;
12688 /* CIE pointer. */
12689 val = p - htab->glink_eh_frame->contents;
12690 bfd_put_32 (htab->elf.dynobj, val, p);
12691 p += 4;
12692 /* Offset to stub section, written later. */
12693 p += 4;
12694 /* stub section size. */
12695 bfd_put_32 (htab->elf.dynobj, stub_sec->size, p);
12696 p += 4;
12697 /* Augmentation. */
12698 p += 1;
12699 /* Pad. */
12700 p += 7;
12701 }
12702 if (htab->glink != NULL && htab->glink->size != 0)
12703 {
12704 last_fde = p;
12705 last_fde_len = 20;
12706 /* FDE length. */
12707 bfd_put_32 (htab->elf.dynobj, 20, p);
12708 p += 4;
12709 /* CIE pointer. */
12710 val = p - htab->glink_eh_frame->contents;
12711 bfd_put_32 (htab->elf.dynobj, val, p);
12712 p += 4;
12713 /* Offset to .glink, written later. */
12714 p += 4;
12715 /* .glink size. */
12716 bfd_put_32 (htab->elf.dynobj, htab->glink->size - 8, p);
12717 p += 4;
12718 /* Augmentation. */
12719 p += 1;
12720
12721 *p++ = DW_CFA_advance_loc + 1;
12722 *p++ = DW_CFA_register;
12723 *p++ = 65;
12724 *p++ = htab->opd_abi ? 12 : 0;
12725 *p++ = DW_CFA_advance_loc + 4;
12726 *p++ = DW_CFA_restore_extended;
12727 *p++ = 65;
12728 }
12729 /* Subsume any padding into the last FDE if user .eh_frame
12730 sections are aligned more than glink_eh_frame. Otherwise any
12731 zero padding will be seen as a terminator. */
12732 size = p - htab->glink_eh_frame->contents;
12733 align = 1;
12734 align <<= htab->glink_eh_frame->output_section->alignment_power;
12735 align -= 1;
12736 pad = ((size + align) & ~align) - size;
12737 htab->glink_eh_frame->size = size + pad;
12738 bfd_put_32 (htab->elf.dynobj, last_fde_len + pad, last_fde);
12739 }
12740
12741 maybe_strip_output (info, htab->brlt);
12742 if (htab->glink_eh_frame != NULL)
12743 maybe_strip_output (info, htab->glink_eh_frame);
12744
12745 return TRUE;
12746 }
12747
12748 /* Called after we have determined section placement. If sections
12749 move, we'll be called again. Provide a value for TOCstart. */
12750
12751 bfd_vma
12752 ppc64_elf_set_toc (struct bfd_link_info *info, bfd *obfd)
12753 {
12754 asection *s;
12755 bfd_vma TOCstart, adjust;
12756
12757 if (info != NULL)
12758 {
12759 struct elf_link_hash_entry *h;
12760 struct elf_link_hash_table *htab = elf_hash_table (info);
12761
12762 if (is_elf_hash_table (htab)
12763 && htab->hgot != NULL)
12764 h = htab->hgot;
12765 else
12766 {
12767 h = elf_link_hash_lookup (htab, ".TOC.", FALSE, FALSE, TRUE);
12768 if (is_elf_hash_table (htab))
12769 htab->hgot = h;
12770 }
12771 if (h != NULL
12772 && h->root.type == bfd_link_hash_defined
12773 && !h->root.linker_def
12774 && (!is_elf_hash_table (htab)
12775 || h->def_regular))
12776 {
12777 TOCstart = (h->root.u.def.value - TOC_BASE_OFF
12778 + h->root.u.def.section->output_offset
12779 + h->root.u.def.section->output_section->vma);
12780 _bfd_set_gp_value (obfd, TOCstart);
12781 return TOCstart;
12782 }
12783 }
12784
12785 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
12786 order. The TOC starts where the first of these sections starts. */
12787 s = bfd_get_section_by_name (obfd, ".got");
12788 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12789 s = bfd_get_section_by_name (obfd, ".toc");
12790 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12791 s = bfd_get_section_by_name (obfd, ".tocbss");
12792 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12793 s = bfd_get_section_by_name (obfd, ".plt");
12794 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12795 {
12796 /* This may happen for
12797 o references to TOC base (SYM@toc / TOC[tc0]) without a
12798 .toc directive
12799 o bad linker script
12800 o --gc-sections and empty TOC sections
12801
12802 FIXME: Warn user? */
12803
12804 /* Look for a likely section. We probably won't even be
12805 using TOCstart. */
12806 for (s = obfd->sections; s != NULL; s = s->next)
12807 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY
12808 | SEC_EXCLUDE))
12809 == (SEC_ALLOC | SEC_SMALL_DATA))
12810 break;
12811 if (s == NULL)
12812 for (s = obfd->sections; s != NULL; s = s->next)
12813 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_EXCLUDE))
12814 == (SEC_ALLOC | SEC_SMALL_DATA))
12815 break;
12816 if (s == NULL)
12817 for (s = obfd->sections; s != NULL; s = s->next)
12818 if ((s->flags & (SEC_ALLOC | SEC_READONLY | SEC_EXCLUDE))
12819 == SEC_ALLOC)
12820 break;
12821 if (s == NULL)
12822 for (s = obfd->sections; s != NULL; s = s->next)
12823 if ((s->flags & (SEC_ALLOC | SEC_EXCLUDE)) == SEC_ALLOC)
12824 break;
12825 }
12826
12827 TOCstart = 0;
12828 if (s != NULL)
12829 TOCstart = s->output_section->vma + s->output_offset;
12830
12831 /* Force alignment. */
12832 adjust = TOCstart & (TOC_BASE_ALIGN - 1);
12833 TOCstart -= adjust;
12834 _bfd_set_gp_value (obfd, TOCstart);
12835
12836 if (info != NULL && s != NULL)
12837 {
12838 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12839
12840 if (htab != NULL)
12841 {
12842 if (htab->elf.hgot != NULL)
12843 {
12844 htab->elf.hgot->root.u.def.value = TOC_BASE_OFF - adjust;
12845 htab->elf.hgot->root.u.def.section = s;
12846 }
12847 }
12848 else
12849 {
12850 struct bfd_link_hash_entry *bh = NULL;
12851 _bfd_generic_link_add_one_symbol (info, obfd, ".TOC.", BSF_GLOBAL,
12852 s, TOC_BASE_OFF - adjust,
12853 NULL, FALSE, FALSE, &bh);
12854 }
12855 }
12856 return TOCstart;
12857 }
12858
12859 /* Called via elf_link_hash_traverse from ppc64_elf_build_stubs to
12860 write out any global entry stubs. */
12861
12862 static bfd_boolean
12863 build_global_entry_stubs (struct elf_link_hash_entry *h, void *inf)
12864 {
12865 struct bfd_link_info *info;
12866 struct ppc_link_hash_table *htab;
12867 struct plt_entry *pent;
12868 asection *s;
12869
12870 if (h->root.type == bfd_link_hash_indirect)
12871 return TRUE;
12872
12873 if (!h->pointer_equality_needed)
12874 return TRUE;
12875
12876 if (h->def_regular)
12877 return TRUE;
12878
12879 info = inf;
12880 htab = ppc_hash_table (info);
12881 if (htab == NULL)
12882 return FALSE;
12883
12884 s = htab->glink;
12885 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
12886 if (pent->plt.offset != (bfd_vma) -1
12887 && pent->addend == 0)
12888 {
12889 bfd_byte *p;
12890 asection *plt;
12891 bfd_vma off;
12892
12893 p = s->contents + h->root.u.def.value;
12894 plt = htab->elf.splt;
12895 if (!htab->elf.dynamic_sections_created
12896 || h->dynindx == -1)
12897 plt = htab->elf.iplt;
12898 off = pent->plt.offset + plt->output_offset + plt->output_section->vma;
12899 off -= h->root.u.def.value + s->output_offset + s->output_section->vma;
12900
12901 if (off + 0x80008000 > 0xffffffff || (off & 3) != 0)
12902 {
12903 info->callbacks->einfo
12904 (_("%P: linkage table error against `%T'\n"),
12905 h->root.root.string);
12906 bfd_set_error (bfd_error_bad_value);
12907 htab->stub_error = TRUE;
12908 }
12909
12910 htab->stub_count[ppc_stub_global_entry - 1] += 1;
12911 if (htab->params->emit_stub_syms)
12912 {
12913 size_t len = strlen (h->root.root.string);
12914 char *name = bfd_malloc (sizeof "12345678.global_entry." + len);
12915
12916 if (name == NULL)
12917 return FALSE;
12918
12919 sprintf (name, "%08x.global_entry.%s", s->id, h->root.root.string);
12920 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
12921 if (h == NULL)
12922 return FALSE;
12923 if (h->root.type == bfd_link_hash_new)
12924 {
12925 h->root.type = bfd_link_hash_defined;
12926 h->root.u.def.section = s;
12927 h->root.u.def.value = p - s->contents;
12928 h->ref_regular = 1;
12929 h->def_regular = 1;
12930 h->ref_regular_nonweak = 1;
12931 h->forced_local = 1;
12932 h->non_elf = 0;
12933 h->root.linker_def = 1;
12934 }
12935 }
12936
12937 if (PPC_HA (off) != 0)
12938 {
12939 bfd_put_32 (s->owner, ADDIS_R12_R12 | PPC_HA (off), p);
12940 p += 4;
12941 }
12942 bfd_put_32 (s->owner, LD_R12_0R12 | PPC_LO (off), p);
12943 p += 4;
12944 bfd_put_32 (s->owner, MTCTR_R12, p);
12945 p += 4;
12946 bfd_put_32 (s->owner, BCTR, p);
12947 break;
12948 }
12949 return TRUE;
12950 }
12951
12952 /* Build all the stubs associated with the current output file.
12953 The stubs are kept in a hash table attached to the main linker
12954 hash table. This function is called via gldelf64ppc_finish. */
12955
12956 bfd_boolean
12957 ppc64_elf_build_stubs (struct bfd_link_info *info,
12958 char **stats)
12959 {
12960 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12961 struct map_stub *group;
12962 asection *stub_sec;
12963 bfd_byte *p;
12964 int stub_sec_count = 0;
12965
12966 if (htab == NULL)
12967 return FALSE;
12968
12969 /* Allocate memory to hold the linker stubs. */
12970 for (stub_sec = htab->params->stub_bfd->sections;
12971 stub_sec != NULL;
12972 stub_sec = stub_sec->next)
12973 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
12974 && stub_sec->size != 0)
12975 {
12976 stub_sec->contents = bfd_zalloc (htab->params->stub_bfd, stub_sec->size);
12977 if (stub_sec->contents == NULL)
12978 return FALSE;
12979 stub_sec->size = 0;
12980 }
12981
12982 if (htab->glink != NULL && htab->glink->size != 0)
12983 {
12984 unsigned int indx;
12985 bfd_vma plt0;
12986
12987 /* Build the .glink plt call stub. */
12988 if (htab->params->emit_stub_syms)
12989 {
12990 struct elf_link_hash_entry *h;
12991 h = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
12992 TRUE, FALSE, FALSE);
12993 if (h == NULL)
12994 return FALSE;
12995 if (h->root.type == bfd_link_hash_new)
12996 {
12997 h->root.type = bfd_link_hash_defined;
12998 h->root.u.def.section = htab->glink;
12999 h->root.u.def.value = 8;
13000 h->ref_regular = 1;
13001 h->def_regular = 1;
13002 h->ref_regular_nonweak = 1;
13003 h->forced_local = 1;
13004 h->non_elf = 0;
13005 h->root.linker_def = 1;
13006 }
13007 }
13008 plt0 = (htab->elf.splt->output_section->vma
13009 + htab->elf.splt->output_offset
13010 - 16);
13011 if (info->emitrelocations)
13012 {
13013 Elf_Internal_Rela *r = get_relocs (htab->glink, 1);
13014 if (r == NULL)
13015 return FALSE;
13016 r->r_offset = (htab->glink->output_offset
13017 + htab->glink->output_section->vma);
13018 r->r_info = ELF64_R_INFO (0, R_PPC64_REL64);
13019 r->r_addend = plt0;
13020 }
13021 p = htab->glink->contents;
13022 plt0 -= htab->glink->output_section->vma + htab->glink->output_offset;
13023 bfd_put_64 (htab->glink->owner, plt0, p);
13024 p += 8;
13025 if (htab->opd_abi)
13026 {
13027 bfd_put_32 (htab->glink->owner, MFLR_R12, p);
13028 p += 4;
13029 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
13030 p += 4;
13031 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
13032 p += 4;
13033 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | (-16 & 0xfffc), p);
13034 p += 4;
13035 bfd_put_32 (htab->glink->owner, MTLR_R12, p);
13036 p += 4;
13037 bfd_put_32 (htab->glink->owner, ADD_R11_R2_R11, p);
13038 p += 4;
13039 bfd_put_32 (htab->glink->owner, LD_R12_0R11, p);
13040 p += 4;
13041 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | 8, p);
13042 p += 4;
13043 bfd_put_32 (htab->glink->owner, MTCTR_R12, p);
13044 p += 4;
13045 bfd_put_32 (htab->glink->owner, LD_R11_0R11 | 16, p);
13046 p += 4;
13047 }
13048 else
13049 {
13050 bfd_put_32 (htab->glink->owner, MFLR_R0, p);
13051 p += 4;
13052 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
13053 p += 4;
13054 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
13055 p += 4;
13056 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | (-16 & 0xfffc), p);
13057 p += 4;
13058 bfd_put_32 (htab->glink->owner, MTLR_R0, p);
13059 p += 4;
13060 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
13061 p += 4;
13062 bfd_put_32 (htab->glink->owner, ADD_R11_R2_R11, p);
13063 p += 4;
13064 bfd_put_32 (htab->glink->owner, ADDI_R0_R12 | (-48 & 0xffff), p);
13065 p += 4;
13066 bfd_put_32 (htab->glink->owner, LD_R12_0R11, p);
13067 p += 4;
13068 bfd_put_32 (htab->glink->owner, SRDI_R0_R0_2, p);
13069 p += 4;
13070 bfd_put_32 (htab->glink->owner, MTCTR_R12, p);
13071 p += 4;
13072 bfd_put_32 (htab->glink->owner, LD_R11_0R11 | 8, p);
13073 p += 4;
13074 }
13075 bfd_put_32 (htab->glink->owner, BCTR, p);
13076 p += 4;
13077 while (p - htab->glink->contents < GLINK_CALL_STUB_SIZE)
13078 {
13079 bfd_put_32 (htab->glink->owner, NOP, p);
13080 p += 4;
13081 }
13082
13083 /* Build the .glink lazy link call stubs. */
13084 indx = 0;
13085 while (p < htab->glink->contents + htab->glink->rawsize)
13086 {
13087 if (htab->opd_abi)
13088 {
13089 if (indx < 0x8000)
13090 {
13091 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
13092 p += 4;
13093 }
13094 else
13095 {
13096 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
13097 p += 4;
13098 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx),
13099 p);
13100 p += 4;
13101 }
13102 }
13103 bfd_put_32 (htab->glink->owner,
13104 B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p);
13105 indx++;
13106 p += 4;
13107 }
13108
13109 /* Build .glink global entry stubs. */
13110 if (htab->glink->size > htab->glink->rawsize)
13111 elf_link_hash_traverse (&htab->elf, build_global_entry_stubs, info);
13112 }
13113
13114 if (htab->brlt != NULL && htab->brlt->size != 0)
13115 {
13116 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
13117 htab->brlt->size);
13118 if (htab->brlt->contents == NULL)
13119 return FALSE;
13120 }
13121 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
13122 {
13123 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
13124 htab->relbrlt->size);
13125 if (htab->relbrlt->contents == NULL)
13126 return FALSE;
13127 }
13128
13129 /* Build the stubs as directed by the stub hash table. */
13130 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
13131
13132 for (group = htab->group; group != NULL; group = group->next)
13133 if (group->needs_save_res)
13134 {
13135 stub_sec = group->stub_sec;
13136 memcpy (stub_sec->contents + stub_sec->size, htab->sfpr->contents,
13137 htab->sfpr->size);
13138 if (htab->params->emit_stub_syms)
13139 {
13140 unsigned int i;
13141
13142 for (i = 0; i < ARRAY_SIZE (save_res_funcs); i++)
13143 if (!sfpr_define (info, &save_res_funcs[i], stub_sec))
13144 return FALSE;
13145 }
13146 stub_sec->size += htab->sfpr->size;
13147 }
13148
13149 if (htab->relbrlt != NULL)
13150 htab->relbrlt->reloc_count = 0;
13151
13152 if (htab->params->plt_stub_align != 0)
13153 for (stub_sec = htab->params->stub_bfd->sections;
13154 stub_sec != NULL;
13155 stub_sec = stub_sec->next)
13156 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
13157 stub_sec->size = ((stub_sec->size
13158 + (1 << htab->params->plt_stub_align) - 1)
13159 & -(1 << htab->params->plt_stub_align));
13160
13161 for (stub_sec = htab->params->stub_bfd->sections;
13162 stub_sec != NULL;
13163 stub_sec = stub_sec->next)
13164 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
13165 {
13166 stub_sec_count += 1;
13167 if (stub_sec->rawsize != stub_sec->size
13168 && (htab->stub_iteration <= STUB_SHRINK_ITER
13169 || stub_sec->rawsize < stub_sec->size))
13170 break;
13171 }
13172
13173 /* Note that the glink_eh_frame check here is not only testing that
13174 the generated size matched the calculated size but also that
13175 bfd_elf_discard_info didn't make any changes to the section. */
13176 if (stub_sec != NULL
13177 || (htab->glink_eh_frame != NULL
13178 && htab->glink_eh_frame->rawsize != htab->glink_eh_frame->size))
13179 {
13180 htab->stub_error = TRUE;
13181 info->callbacks->einfo (_("%P: stubs don't match calculated size\n"));
13182 }
13183
13184 if (htab->stub_error)
13185 return FALSE;
13186
13187 if (stats != NULL)
13188 {
13189 *stats = bfd_malloc (500);
13190 if (*stats == NULL)
13191 return FALSE;
13192
13193 sprintf (*stats, _("linker stubs in %u group%s\n"
13194 " branch %lu\n"
13195 " toc adjust %lu\n"
13196 " long branch %lu\n"
13197 " long toc adj %lu\n"
13198 " plt call %lu\n"
13199 " plt call toc %lu\n"
13200 " global entry %lu"),
13201 stub_sec_count,
13202 stub_sec_count == 1 ? "" : "s",
13203 htab->stub_count[ppc_stub_long_branch - 1],
13204 htab->stub_count[ppc_stub_long_branch_r2off - 1],
13205 htab->stub_count[ppc_stub_plt_branch - 1],
13206 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
13207 htab->stub_count[ppc_stub_plt_call - 1],
13208 htab->stub_count[ppc_stub_plt_call_r2save - 1],
13209 htab->stub_count[ppc_stub_global_entry - 1]);
13210 }
13211 return TRUE;
13212 }
13213
13214 /* This function undoes the changes made by add_symbol_adjust. */
13215
13216 static bfd_boolean
13217 undo_symbol_twiddle (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
13218 {
13219 struct ppc_link_hash_entry *eh;
13220
13221 if (h->root.type == bfd_link_hash_indirect)
13222 return TRUE;
13223
13224 eh = (struct ppc_link_hash_entry *) h;
13225 if (eh->elf.root.type != bfd_link_hash_undefweak || !eh->was_undefined)
13226 return TRUE;
13227
13228 eh->elf.root.type = bfd_link_hash_undefined;
13229 return TRUE;
13230 }
13231
13232 void
13233 ppc64_elf_restore_symbols (struct bfd_link_info *info)
13234 {
13235 struct ppc_link_hash_table *htab = ppc_hash_table (info);
13236
13237 if (htab != NULL)
13238 elf_link_hash_traverse (&htab->elf, undo_symbol_twiddle, info);
13239 }
13240
13241 /* What to do when ld finds relocations against symbols defined in
13242 discarded sections. */
13243
13244 static unsigned int
13245 ppc64_elf_action_discarded (asection *sec)
13246 {
13247 if (strcmp (".opd", sec->name) == 0)
13248 return 0;
13249
13250 if (strcmp (".toc", sec->name) == 0)
13251 return 0;
13252
13253 if (strcmp (".toc1", sec->name) == 0)
13254 return 0;
13255
13256 return _bfd_elf_default_action_discarded (sec);
13257 }
13258
13259 /* The RELOCATE_SECTION function is called by the ELF backend linker
13260 to handle the relocations for a section.
13261
13262 The relocs are always passed as Rela structures; if the section
13263 actually uses Rel structures, the r_addend field will always be
13264 zero.
13265
13266 This function is responsible for adjust the section contents as
13267 necessary, and (if using Rela relocs and generating a
13268 relocatable output file) adjusting the reloc addend as
13269 necessary.
13270
13271 This function does not have to worry about setting the reloc
13272 address or the reloc symbol index.
13273
13274 LOCAL_SYMS is a pointer to the swapped in local symbols.
13275
13276 LOCAL_SECTIONS is an array giving the section in the input file
13277 corresponding to the st_shndx field of each local symbol.
13278
13279 The global hash table entry for the global symbols can be found
13280 via elf_sym_hashes (input_bfd).
13281
13282 When generating relocatable output, this function must handle
13283 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
13284 going to be the section symbol corresponding to the output
13285 section, which means that the addend must be adjusted
13286 accordingly. */
13287
13288 static bfd_boolean
13289 ppc64_elf_relocate_section (bfd *output_bfd,
13290 struct bfd_link_info *info,
13291 bfd *input_bfd,
13292 asection *input_section,
13293 bfd_byte *contents,
13294 Elf_Internal_Rela *relocs,
13295 Elf_Internal_Sym *local_syms,
13296 asection **local_sections)
13297 {
13298 struct ppc_link_hash_table *htab;
13299 Elf_Internal_Shdr *symtab_hdr;
13300 struct elf_link_hash_entry **sym_hashes;
13301 Elf_Internal_Rela *rel;
13302 Elf_Internal_Rela *wrel;
13303 Elf_Internal_Rela *relend;
13304 Elf_Internal_Rela outrel;
13305 bfd_byte *loc;
13306 struct got_entry **local_got_ents;
13307 bfd_vma TOCstart;
13308 bfd_boolean ret = TRUE;
13309 bfd_boolean is_opd;
13310 /* Assume 'at' branch hints. */
13311 bfd_boolean is_isa_v2 = TRUE;
13312 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
13313
13314 /* Initialize howto table if needed. */
13315 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
13316 ppc_howto_init ();
13317
13318 htab = ppc_hash_table (info);
13319 if (htab == NULL)
13320 return FALSE;
13321
13322 /* Don't relocate stub sections. */
13323 if (input_section->owner == htab->params->stub_bfd)
13324 return TRUE;
13325
13326 BFD_ASSERT (is_ppc64_elf (input_bfd));
13327
13328 local_got_ents = elf_local_got_ents (input_bfd);
13329 TOCstart = elf_gp (output_bfd);
13330 symtab_hdr = &elf_symtab_hdr (input_bfd);
13331 sym_hashes = elf_sym_hashes (input_bfd);
13332 is_opd = ppc64_elf_section_data (input_section)->sec_type == sec_opd;
13333
13334 rel = wrel = relocs;
13335 relend = relocs + input_section->reloc_count;
13336 for (; rel < relend; wrel++, rel++)
13337 {
13338 enum elf_ppc64_reloc_type r_type;
13339 bfd_vma addend;
13340 bfd_reloc_status_type r;
13341 Elf_Internal_Sym *sym;
13342 asection *sec;
13343 struct elf_link_hash_entry *h_elf;
13344 struct ppc_link_hash_entry *h;
13345 struct ppc_link_hash_entry *fdh;
13346 const char *sym_name;
13347 unsigned long r_symndx, toc_symndx;
13348 bfd_vma toc_addend;
13349 unsigned char tls_mask, tls_gd, tls_type;
13350 unsigned char sym_type;
13351 bfd_vma relocation;
13352 bfd_boolean unresolved_reloc;
13353 bfd_boolean warned;
13354 enum { DEST_NORMAL, DEST_OPD, DEST_STUB } reloc_dest;
13355 unsigned int insn;
13356 unsigned int mask;
13357 struct ppc_stub_hash_entry *stub_entry;
13358 bfd_vma max_br_offset;
13359 bfd_vma from;
13360 Elf_Internal_Rela orig_rel;
13361 reloc_howto_type *howto;
13362 struct reloc_howto_struct alt_howto;
13363
13364 again:
13365 orig_rel = *rel;
13366
13367 r_type = ELF64_R_TYPE (rel->r_info);
13368 r_symndx = ELF64_R_SYM (rel->r_info);
13369
13370 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
13371 symbol of the previous ADDR64 reloc. The symbol gives us the
13372 proper TOC base to use. */
13373 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
13374 && wrel != relocs
13375 && ELF64_R_TYPE (wrel[-1].r_info) == R_PPC64_ADDR64
13376 && is_opd)
13377 r_symndx = ELF64_R_SYM (wrel[-1].r_info);
13378
13379 sym = NULL;
13380 sec = NULL;
13381 h_elf = NULL;
13382 sym_name = NULL;
13383 unresolved_reloc = FALSE;
13384 warned = FALSE;
13385
13386 if (r_symndx < symtab_hdr->sh_info)
13387 {
13388 /* It's a local symbol. */
13389 struct _opd_sec_data *opd;
13390
13391 sym = local_syms + r_symndx;
13392 sec = local_sections[r_symndx];
13393 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
13394 sym_type = ELF64_ST_TYPE (sym->st_info);
13395 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
13396 opd = get_opd_info (sec);
13397 if (opd != NULL && opd->adjust != NULL)
13398 {
13399 long adjust = opd->adjust[OPD_NDX (sym->st_value
13400 + rel->r_addend)];
13401 if (adjust == -1)
13402 relocation = 0;
13403 else
13404 {
13405 /* If this is a relocation against the opd section sym
13406 and we have edited .opd, adjust the reloc addend so
13407 that ld -r and ld --emit-relocs output is correct.
13408 If it is a reloc against some other .opd symbol,
13409 then the symbol value will be adjusted later. */
13410 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
13411 rel->r_addend += adjust;
13412 else
13413 relocation += adjust;
13414 }
13415 }
13416 }
13417 else
13418 {
13419 bfd_boolean ignored;
13420
13421 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
13422 r_symndx, symtab_hdr, sym_hashes,
13423 h_elf, sec, relocation,
13424 unresolved_reloc, warned, ignored);
13425 sym_name = h_elf->root.root.string;
13426 sym_type = h_elf->type;
13427 if (sec != NULL
13428 && sec->owner == output_bfd
13429 && strcmp (sec->name, ".opd") == 0)
13430 {
13431 /* This is a symbol defined in a linker script. All
13432 such are defined in output sections, even those
13433 defined by simple assignment from a symbol defined in
13434 an input section. Transfer the symbol to an
13435 appropriate input .opd section, so that a branch to
13436 this symbol will be mapped to the location specified
13437 by the opd entry. */
13438 struct bfd_link_order *lo;
13439 for (lo = sec->map_head.link_order; lo != NULL; lo = lo->next)
13440 if (lo->type == bfd_indirect_link_order)
13441 {
13442 asection *isec = lo->u.indirect.section;
13443 if (h_elf->root.u.def.value >= isec->output_offset
13444 && h_elf->root.u.def.value < (isec->output_offset
13445 + isec->size))
13446 {
13447 h_elf->root.u.def.value -= isec->output_offset;
13448 h_elf->root.u.def.section = isec;
13449 sec = isec;
13450 break;
13451 }
13452 }
13453 }
13454 }
13455 h = (struct ppc_link_hash_entry *) h_elf;
13456
13457 if (sec != NULL && discarded_section (sec))
13458 {
13459 _bfd_clear_contents (ppc64_elf_howto_table[r_type],
13460 input_bfd, input_section,
13461 contents + rel->r_offset);
13462 wrel->r_offset = rel->r_offset;
13463 wrel->r_info = 0;
13464 wrel->r_addend = 0;
13465
13466 /* For ld -r, remove relocations in debug sections against
13467 sections defined in discarded sections. Not done for
13468 non-debug to preserve relocs in .eh_frame which the
13469 eh_frame editing code expects to be present. */
13470 if (bfd_link_relocatable (info)
13471 && (input_section->flags & SEC_DEBUGGING))
13472 wrel--;
13473
13474 continue;
13475 }
13476
13477 if (bfd_link_relocatable (info))
13478 goto copy_reloc;
13479
13480 if (h != NULL && &h->elf == htab->elf.hgot)
13481 {
13482 relocation = TOCstart + htab->sec_info[input_section->id].toc_off;
13483 sec = bfd_abs_section_ptr;
13484 unresolved_reloc = FALSE;
13485 }
13486
13487 /* TLS optimizations. Replace instruction sequences and relocs
13488 based on information we collected in tls_optimize. We edit
13489 RELOCS so that --emit-relocs will output something sensible
13490 for the final instruction stream. */
13491 tls_mask = 0;
13492 tls_gd = 0;
13493 toc_symndx = 0;
13494 if (h != NULL)
13495 tls_mask = h->tls_mask;
13496 else if (local_got_ents != NULL)
13497 {
13498 struct plt_entry **local_plt = (struct plt_entry **)
13499 (local_got_ents + symtab_hdr->sh_info);
13500 unsigned char *lgot_masks = (unsigned char *)
13501 (local_plt + symtab_hdr->sh_info);
13502 tls_mask = lgot_masks[r_symndx];
13503 }
13504 if (tls_mask == 0
13505 && (r_type == R_PPC64_TLS
13506 || r_type == R_PPC64_TLSGD
13507 || r_type == R_PPC64_TLSLD))
13508 {
13509 /* Check for toc tls entries. */
13510 unsigned char *toc_tls;
13511
13512 if (!get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
13513 &local_syms, rel, input_bfd))
13514 return FALSE;
13515
13516 if (toc_tls)
13517 tls_mask = *toc_tls;
13518 }
13519
13520 /* Check that tls relocs are used with tls syms, and non-tls
13521 relocs are used with non-tls syms. */
13522 if (r_symndx != STN_UNDEF
13523 && r_type != R_PPC64_NONE
13524 && (h == NULL
13525 || h->elf.root.type == bfd_link_hash_defined
13526 || h->elf.root.type == bfd_link_hash_defweak)
13527 && (IS_PPC64_TLS_RELOC (r_type)
13528 != (sym_type == STT_TLS
13529 || (sym_type == STT_SECTION
13530 && (sec->flags & SEC_THREAD_LOCAL) != 0))))
13531 {
13532 if (tls_mask != 0
13533 && (r_type == R_PPC64_TLS
13534 || r_type == R_PPC64_TLSGD
13535 || r_type == R_PPC64_TLSLD))
13536 /* R_PPC64_TLS is OK against a symbol in the TOC. */
13537 ;
13538 else
13539 info->callbacks->einfo
13540 (!IS_PPC64_TLS_RELOC (r_type)
13541 ? _("%P: %H: %s used with TLS symbol `%T'\n")
13542 : _("%P: %H: %s used with non-TLS symbol `%T'\n"),
13543 input_bfd, input_section, rel->r_offset,
13544 ppc64_elf_howto_table[r_type]->name,
13545 sym_name);
13546 }
13547
13548 /* Ensure reloc mapping code below stays sane. */
13549 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
13550 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
13551 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
13552 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
13553 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
13554 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
13555 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
13556 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
13557 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
13558 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
13559 abort ();
13560
13561 switch (r_type)
13562 {
13563 default:
13564 break;
13565
13566 case R_PPC64_LO_DS_OPT:
13567 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
13568 if ((insn & (0x3f << 26)) != 58u << 26)
13569 abort ();
13570 insn += (14u << 26) - (58u << 26);
13571 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
13572 r_type = R_PPC64_TOC16_LO;
13573 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13574 break;
13575
13576 case R_PPC64_TOC16:
13577 case R_PPC64_TOC16_LO:
13578 case R_PPC64_TOC16_DS:
13579 case R_PPC64_TOC16_LO_DS:
13580 {
13581 /* Check for toc tls entries. */
13582 unsigned char *toc_tls;
13583 int retval;
13584
13585 retval = get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
13586 &local_syms, rel, input_bfd);
13587 if (retval == 0)
13588 return FALSE;
13589
13590 if (toc_tls)
13591 {
13592 tls_mask = *toc_tls;
13593 if (r_type == R_PPC64_TOC16_DS
13594 || r_type == R_PPC64_TOC16_LO_DS)
13595 {
13596 if (tls_mask != 0
13597 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
13598 goto toctprel;
13599 }
13600 else
13601 {
13602 /* If we found a GD reloc pair, then we might be
13603 doing a GD->IE transition. */
13604 if (retval == 2)
13605 {
13606 tls_gd = TLS_TPRELGD;
13607 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13608 goto tls_ldgd_opt;
13609 }
13610 else if (retval == 3)
13611 {
13612 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13613 goto tls_ldgd_opt;
13614 }
13615 }
13616 }
13617 }
13618 break;
13619
13620 case R_PPC64_GOT_TPREL16_HI:
13621 case R_PPC64_GOT_TPREL16_HA:
13622 if (tls_mask != 0
13623 && (tls_mask & TLS_TPREL) == 0)
13624 {
13625 rel->r_offset -= d_offset;
13626 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
13627 r_type = R_PPC64_NONE;
13628 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13629 }
13630 break;
13631
13632 case R_PPC64_GOT_TPREL16_DS:
13633 case R_PPC64_GOT_TPREL16_LO_DS:
13634 if (tls_mask != 0
13635 && (tls_mask & TLS_TPREL) == 0)
13636 {
13637 toctprel:
13638 insn = bfd_get_32 (output_bfd,
13639 contents + rel->r_offset - d_offset);
13640 insn &= 31 << 21;
13641 insn |= 0x3c0d0000; /* addis 0,13,0 */
13642 bfd_put_32 (output_bfd, insn,
13643 contents + rel->r_offset - d_offset);
13644 r_type = R_PPC64_TPREL16_HA;
13645 if (toc_symndx != 0)
13646 {
13647 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
13648 rel->r_addend = toc_addend;
13649 /* We changed the symbol. Start over in order to
13650 get h, sym, sec etc. right. */
13651 goto again;
13652 }
13653 else
13654 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13655 }
13656 break;
13657
13658 case R_PPC64_TLS:
13659 if (tls_mask != 0
13660 && (tls_mask & TLS_TPREL) == 0)
13661 {
13662 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
13663 insn = _bfd_elf_ppc_at_tls_transform (insn, 13);
13664 if (insn == 0)
13665 abort ();
13666 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
13667 /* Was PPC64_TLS which sits on insn boundary, now
13668 PPC64_TPREL16_LO which is at low-order half-word. */
13669 rel->r_offset += d_offset;
13670 r_type = R_PPC64_TPREL16_LO;
13671 if (toc_symndx != 0)
13672 {
13673 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
13674 rel->r_addend = toc_addend;
13675 /* We changed the symbol. Start over in order to
13676 get h, sym, sec etc. right. */
13677 goto again;
13678 }
13679 else
13680 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13681 }
13682 break;
13683
13684 case R_PPC64_GOT_TLSGD16_HI:
13685 case R_PPC64_GOT_TLSGD16_HA:
13686 tls_gd = TLS_TPRELGD;
13687 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13688 goto tls_gdld_hi;
13689 break;
13690
13691 case R_PPC64_GOT_TLSLD16_HI:
13692 case R_PPC64_GOT_TLSLD16_HA:
13693 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13694 {
13695 tls_gdld_hi:
13696 if ((tls_mask & tls_gd) != 0)
13697 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
13698 + R_PPC64_GOT_TPREL16_DS);
13699 else
13700 {
13701 rel->r_offset -= d_offset;
13702 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
13703 r_type = R_PPC64_NONE;
13704 }
13705 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13706 }
13707 break;
13708
13709 case R_PPC64_GOT_TLSGD16:
13710 case R_PPC64_GOT_TLSGD16_LO:
13711 tls_gd = TLS_TPRELGD;
13712 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13713 goto tls_ldgd_opt;
13714 break;
13715
13716 case R_PPC64_GOT_TLSLD16:
13717 case R_PPC64_GOT_TLSLD16_LO:
13718 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13719 {
13720 unsigned int insn1, insn2, insn3;
13721 bfd_vma offset;
13722
13723 tls_ldgd_opt:
13724 offset = (bfd_vma) -1;
13725 /* If not using the newer R_PPC64_TLSGD/LD to mark
13726 __tls_get_addr calls, we must trust that the call
13727 stays with its arg setup insns, ie. that the next
13728 reloc is the __tls_get_addr call associated with
13729 the current reloc. Edit both insns. */
13730 if (input_section->has_tls_get_addr_call
13731 && rel + 1 < relend
13732 && branch_reloc_hash_match (input_bfd, rel + 1,
13733 htab->tls_get_addr,
13734 htab->tls_get_addr_fd))
13735 offset = rel[1].r_offset;
13736 /* We read the low GOT_TLS (or TOC16) insn because we
13737 need to keep the destination reg. It may be
13738 something other than the usual r3, and moved to r3
13739 before the call by intervening code. */
13740 insn1 = bfd_get_32 (output_bfd,
13741 contents + rel->r_offset - d_offset);
13742 if ((tls_mask & tls_gd) != 0)
13743 {
13744 /* IE */
13745 insn1 &= (0x1f << 21) | (0x1f << 16);
13746 insn1 |= 58 << 26; /* ld */
13747 insn2 = 0x7c636a14; /* add 3,3,13 */
13748 if (offset != (bfd_vma) -1)
13749 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13750 if ((tls_mask & TLS_EXPLICIT) == 0)
13751 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
13752 + R_PPC64_GOT_TPREL16_DS);
13753 else
13754 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
13755 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13756 }
13757 else
13758 {
13759 /* LE */
13760 insn1 &= 0x1f << 21;
13761 insn1 |= 0x3c0d0000; /* addis r,13,0 */
13762 insn2 = 0x38630000; /* addi 3,3,0 */
13763 if (tls_gd == 0)
13764 {
13765 /* Was an LD reloc. */
13766 if (toc_symndx)
13767 sec = local_sections[toc_symndx];
13768 for (r_symndx = 0;
13769 r_symndx < symtab_hdr->sh_info;
13770 r_symndx++)
13771 if (local_sections[r_symndx] == sec)
13772 break;
13773 if (r_symndx >= symtab_hdr->sh_info)
13774 r_symndx = STN_UNDEF;
13775 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
13776 if (r_symndx != STN_UNDEF)
13777 rel->r_addend -= (local_syms[r_symndx].st_value
13778 + sec->output_offset
13779 + sec->output_section->vma);
13780 }
13781 else if (toc_symndx != 0)
13782 {
13783 r_symndx = toc_symndx;
13784 rel->r_addend = toc_addend;
13785 }
13786 r_type = R_PPC64_TPREL16_HA;
13787 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13788 if (offset != (bfd_vma) -1)
13789 {
13790 rel[1].r_info = ELF64_R_INFO (r_symndx,
13791 R_PPC64_TPREL16_LO);
13792 rel[1].r_offset = offset + d_offset;
13793 rel[1].r_addend = rel->r_addend;
13794 }
13795 }
13796 bfd_put_32 (output_bfd, insn1,
13797 contents + rel->r_offset - d_offset);
13798 if (offset != (bfd_vma) -1)
13799 {
13800 insn3 = bfd_get_32 (output_bfd,
13801 contents + offset + 4);
13802 if (insn3 == NOP
13803 || insn3 == CROR_151515 || insn3 == CROR_313131)
13804 {
13805 rel[1].r_offset += 4;
13806 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
13807 insn2 = NOP;
13808 }
13809 bfd_put_32 (output_bfd, insn2, contents + offset);
13810 }
13811 if ((tls_mask & tls_gd) == 0
13812 && (tls_gd == 0 || toc_symndx != 0))
13813 {
13814 /* We changed the symbol. Start over in order
13815 to get h, sym, sec etc. right. */
13816 goto again;
13817 }
13818 }
13819 break;
13820
13821 case R_PPC64_TLSGD:
13822 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13823 {
13824 unsigned int insn2, insn3;
13825 bfd_vma offset = rel->r_offset;
13826
13827 if ((tls_mask & TLS_TPRELGD) != 0)
13828 {
13829 /* IE */
13830 r_type = R_PPC64_NONE;
13831 insn2 = 0x7c636a14; /* add 3,3,13 */
13832 }
13833 else
13834 {
13835 /* LE */
13836 if (toc_symndx != 0)
13837 {
13838 r_symndx = toc_symndx;
13839 rel->r_addend = toc_addend;
13840 }
13841 r_type = R_PPC64_TPREL16_LO;
13842 rel->r_offset = offset + d_offset;
13843 insn2 = 0x38630000; /* addi 3,3,0 */
13844 }
13845 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13846 /* Zap the reloc on the _tls_get_addr call too. */
13847 BFD_ASSERT (offset == rel[1].r_offset);
13848 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13849 insn3 = bfd_get_32 (output_bfd,
13850 contents + offset + 4);
13851 if (insn3 == NOP
13852 || insn3 == CROR_151515 || insn3 == CROR_313131)
13853 {
13854 rel->r_offset += 4;
13855 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
13856 insn2 = NOP;
13857 }
13858 bfd_put_32 (output_bfd, insn2, contents + offset);
13859 if ((tls_mask & TLS_TPRELGD) == 0 && toc_symndx != 0)
13860 goto again;
13861 }
13862 break;
13863
13864 case R_PPC64_TLSLD:
13865 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13866 {
13867 unsigned int insn2, insn3;
13868 bfd_vma offset = rel->r_offset;
13869
13870 if (toc_symndx)
13871 sec = local_sections[toc_symndx];
13872 for (r_symndx = 0;
13873 r_symndx < symtab_hdr->sh_info;
13874 r_symndx++)
13875 if (local_sections[r_symndx] == sec)
13876 break;
13877 if (r_symndx >= symtab_hdr->sh_info)
13878 r_symndx = STN_UNDEF;
13879 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
13880 if (r_symndx != STN_UNDEF)
13881 rel->r_addend -= (local_syms[r_symndx].st_value
13882 + sec->output_offset
13883 + sec->output_section->vma);
13884
13885 r_type = R_PPC64_TPREL16_LO;
13886 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13887 rel->r_offset = offset + d_offset;
13888 /* Zap the reloc on the _tls_get_addr call too. */
13889 BFD_ASSERT (offset == rel[1].r_offset);
13890 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13891 insn2 = 0x38630000; /* addi 3,3,0 */
13892 insn3 = bfd_get_32 (output_bfd,
13893 contents + offset + 4);
13894 if (insn3 == NOP
13895 || insn3 == CROR_151515 || insn3 == CROR_313131)
13896 {
13897 rel->r_offset += 4;
13898 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
13899 insn2 = NOP;
13900 }
13901 bfd_put_32 (output_bfd, insn2, contents + offset);
13902 goto again;
13903 }
13904 break;
13905
13906 case R_PPC64_DTPMOD64:
13907 if (rel + 1 < relend
13908 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
13909 && rel[1].r_offset == rel->r_offset + 8)
13910 {
13911 if ((tls_mask & TLS_GD) == 0)
13912 {
13913 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
13914 if ((tls_mask & TLS_TPRELGD) != 0)
13915 r_type = R_PPC64_TPREL64;
13916 else
13917 {
13918 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
13919 r_type = R_PPC64_NONE;
13920 }
13921 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13922 }
13923 }
13924 else
13925 {
13926 if ((tls_mask & TLS_LD) == 0)
13927 {
13928 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
13929 r_type = R_PPC64_NONE;
13930 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13931 }
13932 }
13933 break;
13934
13935 case R_PPC64_TPREL64:
13936 if ((tls_mask & TLS_TPREL) == 0)
13937 {
13938 r_type = R_PPC64_NONE;
13939 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13940 }
13941 break;
13942
13943 case R_PPC64_ENTRY:
13944 relocation = TOCstart + htab->sec_info[input_section->id].toc_off;
13945 if (!bfd_link_pic (info)
13946 && !info->traditional_format
13947 && relocation + 0x80008000 <= 0xffffffff)
13948 {
13949 unsigned int insn1, insn2;
13950
13951 insn1 = bfd_get_32 (input_bfd, contents + rel->r_offset);
13952 insn2 = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
13953 if ((insn1 & ~0xfffc) == LD_R2_0R12
13954 && insn2 == ADD_R2_R2_R12)
13955 {
13956 bfd_put_32 (output_bfd,
13957 LIS_R2 + PPC_HA (relocation),
13958 contents + rel->r_offset);
13959 bfd_put_32 (output_bfd,
13960 ADDI_R2_R2 + PPC_LO (relocation),
13961 contents + rel->r_offset + 4);
13962 }
13963 }
13964 else
13965 {
13966 relocation -= (rel->r_offset
13967 + input_section->output_offset
13968 + input_section->output_section->vma);
13969 if (relocation + 0x80008000 <= 0xffffffff)
13970 {
13971 unsigned int insn1, insn2;
13972
13973 insn1 = bfd_get_32 (input_bfd, contents + rel->r_offset);
13974 insn2 = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
13975 if ((insn1 & ~0xfffc) == LD_R2_0R12
13976 && insn2 == ADD_R2_R2_R12)
13977 {
13978 bfd_put_32 (output_bfd,
13979 ADDIS_R2_R12 + PPC_HA (relocation),
13980 contents + rel->r_offset);
13981 bfd_put_32 (output_bfd,
13982 ADDI_R2_R2 + PPC_LO (relocation),
13983 contents + rel->r_offset + 4);
13984 }
13985 }
13986 }
13987 break;
13988
13989 case R_PPC64_REL16_HA:
13990 /* If we are generating a non-PIC executable, edit
13991 . 0: addis 2,12,.TOC.-0b@ha
13992 . addi 2,2,.TOC.-0b@l
13993 used by ELFv2 global entry points to set up r2, to
13994 . lis 2,.TOC.@ha
13995 . addi 2,2,.TOC.@l
13996 if .TOC. is in range. */
13997 if (!bfd_link_pic (info)
13998 && !info->traditional_format
13999 && !htab->opd_abi
14000 && rel->r_addend == d_offset
14001 && h != NULL && &h->elf == htab->elf.hgot
14002 && rel + 1 < relend
14003 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_REL16_LO)
14004 && rel[1].r_offset == rel->r_offset + 4
14005 && rel[1].r_addend == rel->r_addend + 4
14006 && relocation + 0x80008000 <= 0xffffffff)
14007 {
14008 unsigned int insn1, insn2;
14009 bfd_vma offset = rel->r_offset - d_offset;
14010 insn1 = bfd_get_32 (output_bfd, contents + offset);
14011 insn2 = bfd_get_32 (output_bfd, contents + offset + 4);
14012 if ((insn1 & 0xffff0000) == ADDIS_R2_R12
14013 && (insn2 & 0xffff0000) == ADDI_R2_R2)
14014 {
14015 r_type = R_PPC64_ADDR16_HA;
14016 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14017 rel->r_addend -= d_offset;
14018 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_ADDR16_LO);
14019 rel[1].r_addend -= d_offset + 4;
14020 bfd_put_32 (output_bfd, LIS_R2, contents + offset);
14021 }
14022 }
14023 break;
14024 }
14025
14026 /* Handle other relocations that tweak non-addend part of insn. */
14027 insn = 0;
14028 max_br_offset = 1 << 25;
14029 addend = rel->r_addend;
14030 reloc_dest = DEST_NORMAL;
14031 switch (r_type)
14032 {
14033 default:
14034 break;
14035
14036 case R_PPC64_TOCSAVE:
14037 if (relocation + addend == (rel->r_offset
14038 + input_section->output_offset
14039 + input_section->output_section->vma)
14040 && tocsave_find (htab, NO_INSERT,
14041 &local_syms, rel, input_bfd))
14042 {
14043 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
14044 if (insn == NOP
14045 || insn == CROR_151515 || insn == CROR_313131)
14046 bfd_put_32 (input_bfd,
14047 STD_R2_0R1 + STK_TOC (htab),
14048 contents + rel->r_offset);
14049 }
14050 break;
14051
14052 /* Branch taken prediction relocations. */
14053 case R_PPC64_ADDR14_BRTAKEN:
14054 case R_PPC64_REL14_BRTAKEN:
14055 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
14056 /* Fall thru. */
14057
14058 /* Branch not taken prediction relocations. */
14059 case R_PPC64_ADDR14_BRNTAKEN:
14060 case R_PPC64_REL14_BRNTAKEN:
14061 insn |= bfd_get_32 (output_bfd,
14062 contents + rel->r_offset) & ~(0x01 << 21);
14063 /* Fall thru. */
14064
14065 case R_PPC64_REL14:
14066 max_br_offset = 1 << 15;
14067 /* Fall thru. */
14068
14069 case R_PPC64_REL24:
14070 /* Calls to functions with a different TOC, such as calls to
14071 shared objects, need to alter the TOC pointer. This is
14072 done using a linkage stub. A REL24 branching to these
14073 linkage stubs needs to be followed by a nop, as the nop
14074 will be replaced with an instruction to restore the TOC
14075 base pointer. */
14076 fdh = h;
14077 if (h != NULL
14078 && h->oh != NULL
14079 && h->oh->is_func_descriptor)
14080 fdh = ppc_follow_link (h->oh);
14081 stub_entry = ppc_get_stub_entry (input_section, sec, fdh, &orig_rel,
14082 htab);
14083 if (stub_entry != NULL
14084 && (stub_entry->stub_type == ppc_stub_plt_call
14085 || stub_entry->stub_type == ppc_stub_plt_call_r2save
14086 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
14087 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
14088 {
14089 bfd_boolean can_plt_call = FALSE;
14090
14091 /* All of these stubs will modify r2, so there must be a
14092 branch and link followed by a nop. The nop is
14093 replaced by an insn to restore r2. */
14094 if (rel->r_offset + 8 <= input_section->size)
14095 {
14096 unsigned long br;
14097
14098 br = bfd_get_32 (input_bfd,
14099 contents + rel->r_offset);
14100 if ((br & 1) != 0)
14101 {
14102 unsigned long nop;
14103
14104 nop = bfd_get_32 (input_bfd,
14105 contents + rel->r_offset + 4);
14106 if (nop == NOP
14107 || nop == CROR_151515 || nop == CROR_313131)
14108 {
14109 if (h != NULL
14110 && (h == htab->tls_get_addr_fd
14111 || h == htab->tls_get_addr)
14112 && htab->params->tls_get_addr_opt)
14113 {
14114 /* Special stub used, leave nop alone. */
14115 }
14116 else
14117 bfd_put_32 (input_bfd,
14118 LD_R2_0R1 + STK_TOC (htab),
14119 contents + rel->r_offset + 4);
14120 can_plt_call = TRUE;
14121 }
14122 }
14123 }
14124
14125 if (!can_plt_call && h != NULL)
14126 {
14127 const char *name = h->elf.root.root.string;
14128
14129 if (*name == '.')
14130 ++name;
14131
14132 if (strncmp (name, "__libc_start_main", 17) == 0
14133 && (name[17] == 0 || name[17] == '@'))
14134 {
14135 /* Allow crt1 branch to go via a toc adjusting
14136 stub. Other calls that never return could do
14137 the same, if we could detect such. */
14138 can_plt_call = TRUE;
14139 }
14140 }
14141
14142 if (!can_plt_call)
14143 {
14144 /* g++ as of 20130507 emits self-calls without a
14145 following nop. This is arguably wrong since we
14146 have conflicting information. On the one hand a
14147 global symbol and on the other a local call
14148 sequence, but don't error for this special case.
14149 It isn't possible to cheaply verify we have
14150 exactly such a call. Allow all calls to the same
14151 section. */
14152 asection *code_sec = sec;
14153
14154 if (get_opd_info (sec) != NULL)
14155 {
14156 bfd_vma off = (relocation + addend
14157 - sec->output_section->vma
14158 - sec->output_offset);
14159
14160 opd_entry_value (sec, off, &code_sec, NULL, FALSE);
14161 }
14162 if (code_sec == input_section)
14163 can_plt_call = TRUE;
14164 }
14165
14166 if (!can_plt_call)
14167 {
14168 if (stub_entry->stub_type == ppc_stub_plt_call
14169 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14170 info->callbacks->einfo
14171 (_("%P: %H: call to `%T' lacks nop, can't restore toc; "
14172 "recompile with -fPIC\n"),
14173 input_bfd, input_section, rel->r_offset, sym_name);
14174 else
14175 info->callbacks->einfo
14176 (_("%P: %H: call to `%T' lacks nop, can't restore toc; "
14177 "(-mcmodel=small toc adjust stub)\n"),
14178 input_bfd, input_section, rel->r_offset, sym_name);
14179
14180 bfd_set_error (bfd_error_bad_value);
14181 ret = FALSE;
14182 }
14183
14184 if (can_plt_call
14185 && (stub_entry->stub_type == ppc_stub_plt_call
14186 || stub_entry->stub_type == ppc_stub_plt_call_r2save))
14187 unresolved_reloc = FALSE;
14188 }
14189
14190 if ((stub_entry == NULL
14191 || stub_entry->stub_type == ppc_stub_long_branch
14192 || stub_entry->stub_type == ppc_stub_plt_branch)
14193 && get_opd_info (sec) != NULL)
14194 {
14195 /* The branch destination is the value of the opd entry. */
14196 bfd_vma off = (relocation + addend
14197 - sec->output_section->vma
14198 - sec->output_offset);
14199 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL, FALSE);
14200 if (dest != (bfd_vma) -1)
14201 {
14202 relocation = dest;
14203 addend = 0;
14204 reloc_dest = DEST_OPD;
14205 }
14206 }
14207
14208 /* If the branch is out of reach we ought to have a long
14209 branch stub. */
14210 from = (rel->r_offset
14211 + input_section->output_offset
14212 + input_section->output_section->vma);
14213
14214 relocation += PPC64_LOCAL_ENTRY_OFFSET (fdh
14215 ? fdh->elf.other
14216 : sym->st_other);
14217
14218 if (stub_entry != NULL
14219 && (stub_entry->stub_type == ppc_stub_long_branch
14220 || stub_entry->stub_type == ppc_stub_plt_branch)
14221 && (r_type == R_PPC64_ADDR14_BRTAKEN
14222 || r_type == R_PPC64_ADDR14_BRNTAKEN
14223 || (relocation + addend - from + max_br_offset
14224 < 2 * max_br_offset)))
14225 /* Don't use the stub if this branch is in range. */
14226 stub_entry = NULL;
14227
14228 if (stub_entry != NULL)
14229 {
14230 /* Munge up the value and addend so that we call the stub
14231 rather than the procedure directly. */
14232 asection *stub_sec = stub_entry->group->stub_sec;
14233
14234 if (stub_entry->stub_type == ppc_stub_save_res)
14235 relocation += (stub_sec->output_offset
14236 + stub_sec->output_section->vma
14237 + stub_sec->size - htab->sfpr->size
14238 - htab->sfpr->output_offset
14239 - htab->sfpr->output_section->vma);
14240 else
14241 relocation = (stub_entry->stub_offset
14242 + stub_sec->output_offset
14243 + stub_sec->output_section->vma);
14244 addend = 0;
14245 reloc_dest = DEST_STUB;
14246
14247 if ((stub_entry->stub_type == ppc_stub_plt_call
14248 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14249 && (ALWAYS_EMIT_R2SAVE
14250 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14251 && rel + 1 < relend
14252 && rel[1].r_offset == rel->r_offset + 4
14253 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOCSAVE)
14254 relocation += 4;
14255 }
14256
14257 if (insn != 0)
14258 {
14259 if (is_isa_v2)
14260 {
14261 /* Set 'a' bit. This is 0b00010 in BO field for branch
14262 on CR(BI) insns (BO == 001at or 011at), and 0b01000
14263 for branch on CTR insns (BO == 1a00t or 1a01t). */
14264 if ((insn & (0x14 << 21)) == (0x04 << 21))
14265 insn |= 0x02 << 21;
14266 else if ((insn & (0x14 << 21)) == (0x10 << 21))
14267 insn |= 0x08 << 21;
14268 else
14269 break;
14270 }
14271 else
14272 {
14273 /* Invert 'y' bit if not the default. */
14274 if ((bfd_signed_vma) (relocation + addend - from) < 0)
14275 insn ^= 0x01 << 21;
14276 }
14277
14278 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
14279 }
14280
14281 /* NOP out calls to undefined weak functions.
14282 We can thus call a weak function without first
14283 checking whether the function is defined. */
14284 else if (h != NULL
14285 && h->elf.root.type == bfd_link_hash_undefweak
14286 && h->elf.dynindx == -1
14287 && r_type == R_PPC64_REL24
14288 && relocation == 0
14289 && addend == 0)
14290 {
14291 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
14292 goto copy_reloc;
14293 }
14294 break;
14295 }
14296
14297 /* Set `addend'. */
14298 tls_type = 0;
14299 switch (r_type)
14300 {
14301 default:
14302 info->callbacks->einfo
14303 (_("%P: %B: unknown relocation type %d for `%T'\n"),
14304 input_bfd, (int) r_type, sym_name);
14305
14306 bfd_set_error (bfd_error_bad_value);
14307 ret = FALSE;
14308 goto copy_reloc;
14309
14310 case R_PPC64_NONE:
14311 case R_PPC64_TLS:
14312 case R_PPC64_TLSGD:
14313 case R_PPC64_TLSLD:
14314 case R_PPC64_TOCSAVE:
14315 case R_PPC64_GNU_VTINHERIT:
14316 case R_PPC64_GNU_VTENTRY:
14317 case R_PPC64_ENTRY:
14318 goto copy_reloc;
14319
14320 /* GOT16 relocations. Like an ADDR16 using the symbol's
14321 address in the GOT as relocation value instead of the
14322 symbol's value itself. Also, create a GOT entry for the
14323 symbol and put the symbol value there. */
14324 case R_PPC64_GOT_TLSGD16:
14325 case R_PPC64_GOT_TLSGD16_LO:
14326 case R_PPC64_GOT_TLSGD16_HI:
14327 case R_PPC64_GOT_TLSGD16_HA:
14328 tls_type = TLS_TLS | TLS_GD;
14329 goto dogot;
14330
14331 case R_PPC64_GOT_TLSLD16:
14332 case R_PPC64_GOT_TLSLD16_LO:
14333 case R_PPC64_GOT_TLSLD16_HI:
14334 case R_PPC64_GOT_TLSLD16_HA:
14335 tls_type = TLS_TLS | TLS_LD;
14336 goto dogot;
14337
14338 case R_PPC64_GOT_TPREL16_DS:
14339 case R_PPC64_GOT_TPREL16_LO_DS:
14340 case R_PPC64_GOT_TPREL16_HI:
14341 case R_PPC64_GOT_TPREL16_HA:
14342 tls_type = TLS_TLS | TLS_TPREL;
14343 goto dogot;
14344
14345 case R_PPC64_GOT_DTPREL16_DS:
14346 case R_PPC64_GOT_DTPREL16_LO_DS:
14347 case R_PPC64_GOT_DTPREL16_HI:
14348 case R_PPC64_GOT_DTPREL16_HA:
14349 tls_type = TLS_TLS | TLS_DTPREL;
14350 goto dogot;
14351
14352 case R_PPC64_GOT16:
14353 case R_PPC64_GOT16_LO:
14354 case R_PPC64_GOT16_HI:
14355 case R_PPC64_GOT16_HA:
14356 case R_PPC64_GOT16_DS:
14357 case R_PPC64_GOT16_LO_DS:
14358 dogot:
14359 {
14360 /* Relocation is to the entry for this symbol in the global
14361 offset table. */
14362 asection *got;
14363 bfd_vma *offp;
14364 bfd_vma off;
14365 unsigned long indx = 0;
14366 struct got_entry *ent;
14367
14368 if (tls_type == (TLS_TLS | TLS_LD)
14369 && (h == NULL
14370 || !h->elf.def_dynamic))
14371 ent = ppc64_tlsld_got (input_bfd);
14372 else
14373 {
14374
14375 if (h != NULL)
14376 {
14377 bfd_boolean dyn = htab->elf.dynamic_sections_created;
14378 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, bfd_link_pic (info),
14379 &h->elf)
14380 || (bfd_link_pic (info)
14381 && SYMBOL_REFERENCES_LOCAL (info, &h->elf)))
14382 /* This is actually a static link, or it is a
14383 -Bsymbolic link and the symbol is defined
14384 locally, or the symbol was forced to be local
14385 because of a version file. */
14386 ;
14387 else
14388 {
14389 BFD_ASSERT (h->elf.dynindx != -1);
14390 indx = h->elf.dynindx;
14391 unresolved_reloc = FALSE;
14392 }
14393 ent = h->elf.got.glist;
14394 }
14395 else
14396 {
14397 if (local_got_ents == NULL)
14398 abort ();
14399 ent = local_got_ents[r_symndx];
14400 }
14401
14402 for (; ent != NULL; ent = ent->next)
14403 if (ent->addend == orig_rel.r_addend
14404 && ent->owner == input_bfd
14405 && ent->tls_type == tls_type)
14406 break;
14407 }
14408
14409 if (ent == NULL)
14410 abort ();
14411 if (ent->is_indirect)
14412 ent = ent->got.ent;
14413 offp = &ent->got.offset;
14414 got = ppc64_elf_tdata (ent->owner)->got;
14415 if (got == NULL)
14416 abort ();
14417
14418 /* The offset must always be a multiple of 8. We use the
14419 least significant bit to record whether we have already
14420 processed this entry. */
14421 off = *offp;
14422 if ((off & 1) != 0)
14423 off &= ~1;
14424 else
14425 {
14426 /* Generate relocs for the dynamic linker, except in
14427 the case of TLSLD where we'll use one entry per
14428 module. */
14429 asection *relgot;
14430 bfd_boolean ifunc;
14431
14432 *offp = off | 1;
14433 relgot = NULL;
14434 ifunc = (h != NULL
14435 ? h->elf.type == STT_GNU_IFUNC
14436 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC);
14437 if (ifunc)
14438 relgot = htab->elf.irelplt;
14439 else if ((bfd_link_pic (info) || indx != 0)
14440 && (h == NULL
14441 || (tls_type == (TLS_TLS | TLS_LD)
14442 && !h->elf.def_dynamic)
14443 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
14444 || h->elf.root.type != bfd_link_hash_undefweak))
14445 relgot = ppc64_elf_tdata (ent->owner)->relgot;
14446 if (relgot != NULL)
14447 {
14448 outrel.r_offset = (got->output_section->vma
14449 + got->output_offset
14450 + off);
14451 outrel.r_addend = addend;
14452 if (tls_type & (TLS_LD | TLS_GD))
14453 {
14454 outrel.r_addend = 0;
14455 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
14456 if (tls_type == (TLS_TLS | TLS_GD))
14457 {
14458 loc = relgot->contents;
14459 loc += (relgot->reloc_count++
14460 * sizeof (Elf64_External_Rela));
14461 bfd_elf64_swap_reloca_out (output_bfd,
14462 &outrel, loc);
14463 outrel.r_offset += 8;
14464 outrel.r_addend = addend;
14465 outrel.r_info
14466 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
14467 }
14468 }
14469 else if (tls_type == (TLS_TLS | TLS_DTPREL))
14470 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
14471 else if (tls_type == (TLS_TLS | TLS_TPREL))
14472 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
14473 else if (indx != 0)
14474 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
14475 else
14476 {
14477 if (ifunc)
14478 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
14479 else
14480 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
14481
14482 /* Write the .got section contents for the sake
14483 of prelink. */
14484 loc = got->contents + off;
14485 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
14486 loc);
14487 }
14488
14489 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
14490 {
14491 outrel.r_addend += relocation;
14492 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
14493 {
14494 if (htab->elf.tls_sec == NULL)
14495 outrel.r_addend = 0;
14496 else
14497 outrel.r_addend -= htab->elf.tls_sec->vma;
14498 }
14499 }
14500 loc = relgot->contents;
14501 loc += (relgot->reloc_count++
14502 * sizeof (Elf64_External_Rela));
14503 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
14504 }
14505
14506 /* Init the .got section contents here if we're not
14507 emitting a reloc. */
14508 else
14509 {
14510 relocation += addend;
14511 if (tls_type == (TLS_TLS | TLS_LD))
14512 relocation = 1;
14513 else if (tls_type != 0)
14514 {
14515 if (htab->elf.tls_sec == NULL)
14516 relocation = 0;
14517 else
14518 {
14519 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
14520 if (tls_type == (TLS_TLS | TLS_TPREL))
14521 relocation += DTP_OFFSET - TP_OFFSET;
14522 }
14523
14524 if (tls_type == (TLS_TLS | TLS_GD))
14525 {
14526 bfd_put_64 (output_bfd, relocation,
14527 got->contents + off + 8);
14528 relocation = 1;
14529 }
14530 }
14531
14532 bfd_put_64 (output_bfd, relocation,
14533 got->contents + off);
14534 }
14535 }
14536
14537 if (off >= (bfd_vma) -2)
14538 abort ();
14539
14540 relocation = got->output_section->vma + got->output_offset + off;
14541 addend = -(TOCstart + htab->sec_info[input_section->id].toc_off);
14542 }
14543 break;
14544
14545 case R_PPC64_PLT16_HA:
14546 case R_PPC64_PLT16_HI:
14547 case R_PPC64_PLT16_LO:
14548 case R_PPC64_PLT32:
14549 case R_PPC64_PLT64:
14550 /* Relocation is to the entry for this symbol in the
14551 procedure linkage table. */
14552 {
14553 struct plt_entry **plt_list = NULL;
14554 if (h != NULL)
14555 plt_list = &h->elf.plt.plist;
14556 else if (local_got_ents != NULL)
14557 {
14558 struct plt_entry **local_plt = (struct plt_entry **)
14559 (local_got_ents + symtab_hdr->sh_info);
14560 unsigned char *local_got_tls_masks = (unsigned char *)
14561 (local_plt + symtab_hdr->sh_info);
14562 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
14563 plt_list = local_plt + r_symndx;
14564 }
14565 if (plt_list)
14566 {
14567 struct plt_entry *ent;
14568
14569 for (ent = *plt_list; ent != NULL; ent = ent->next)
14570 if (ent->plt.offset != (bfd_vma) -1
14571 && ent->addend == orig_rel.r_addend)
14572 {
14573 asection *plt;
14574
14575 plt = htab->elf.splt;
14576 if (!htab->elf.dynamic_sections_created
14577 || h == NULL
14578 || h->elf.dynindx == -1)
14579 plt = htab->elf.iplt;
14580 relocation = (plt->output_section->vma
14581 + plt->output_offset
14582 + ent->plt.offset);
14583 addend = 0;
14584 unresolved_reloc = FALSE;
14585 break;
14586 }
14587 }
14588 }
14589 break;
14590
14591 case R_PPC64_TOC:
14592 /* Relocation value is TOC base. */
14593 relocation = TOCstart;
14594 if (r_symndx == STN_UNDEF)
14595 relocation += htab->sec_info[input_section->id].toc_off;
14596 else if (unresolved_reloc)
14597 ;
14598 else if (sec != NULL && sec->id < htab->sec_info_arr_size)
14599 relocation += htab->sec_info[sec->id].toc_off;
14600 else
14601 unresolved_reloc = TRUE;
14602 goto dodyn;
14603
14604 /* TOC16 relocs. We want the offset relative to the TOC base,
14605 which is the address of the start of the TOC plus 0x8000.
14606 The TOC consists of sections .got, .toc, .tocbss, and .plt,
14607 in this order. */
14608 case R_PPC64_TOC16:
14609 case R_PPC64_TOC16_LO:
14610 case R_PPC64_TOC16_HI:
14611 case R_PPC64_TOC16_DS:
14612 case R_PPC64_TOC16_LO_DS:
14613 case R_PPC64_TOC16_HA:
14614 addend -= TOCstart + htab->sec_info[input_section->id].toc_off;
14615 break;
14616
14617 /* Relocate against the beginning of the section. */
14618 case R_PPC64_SECTOFF:
14619 case R_PPC64_SECTOFF_LO:
14620 case R_PPC64_SECTOFF_HI:
14621 case R_PPC64_SECTOFF_DS:
14622 case R_PPC64_SECTOFF_LO_DS:
14623 case R_PPC64_SECTOFF_HA:
14624 if (sec != NULL)
14625 addend -= sec->output_section->vma;
14626 break;
14627
14628 case R_PPC64_REL16:
14629 case R_PPC64_REL16_LO:
14630 case R_PPC64_REL16_HI:
14631 case R_PPC64_REL16_HA:
14632 case R_PPC64_REL16DX_HA:
14633 break;
14634
14635 case R_PPC64_REL14:
14636 case R_PPC64_REL14_BRNTAKEN:
14637 case R_PPC64_REL14_BRTAKEN:
14638 case R_PPC64_REL24:
14639 break;
14640
14641 case R_PPC64_TPREL16:
14642 case R_PPC64_TPREL16_LO:
14643 case R_PPC64_TPREL16_HI:
14644 case R_PPC64_TPREL16_HA:
14645 case R_PPC64_TPREL16_DS:
14646 case R_PPC64_TPREL16_LO_DS:
14647 case R_PPC64_TPREL16_HIGH:
14648 case R_PPC64_TPREL16_HIGHA:
14649 case R_PPC64_TPREL16_HIGHER:
14650 case R_PPC64_TPREL16_HIGHERA:
14651 case R_PPC64_TPREL16_HIGHEST:
14652 case R_PPC64_TPREL16_HIGHESTA:
14653 if (h != NULL
14654 && h->elf.root.type == bfd_link_hash_undefweak
14655 && h->elf.dynindx == -1)
14656 {
14657 /* Make this relocation against an undefined weak symbol
14658 resolve to zero. This is really just a tweak, since
14659 code using weak externs ought to check that they are
14660 defined before using them. */
14661 bfd_byte *p = contents + rel->r_offset - d_offset;
14662
14663 insn = bfd_get_32 (output_bfd, p);
14664 insn = _bfd_elf_ppc_at_tprel_transform (insn, 13);
14665 if (insn != 0)
14666 bfd_put_32 (output_bfd, insn, p);
14667 break;
14668 }
14669 if (htab->elf.tls_sec != NULL)
14670 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
14671 if (bfd_link_pic (info))
14672 /* The TPREL16 relocs shouldn't really be used in shared
14673 libs as they will result in DT_TEXTREL being set, but
14674 support them anyway. */
14675 goto dodyn;
14676 break;
14677
14678 case R_PPC64_DTPREL16:
14679 case R_PPC64_DTPREL16_LO:
14680 case R_PPC64_DTPREL16_HI:
14681 case R_PPC64_DTPREL16_HA:
14682 case R_PPC64_DTPREL16_DS:
14683 case R_PPC64_DTPREL16_LO_DS:
14684 case R_PPC64_DTPREL16_HIGH:
14685 case R_PPC64_DTPREL16_HIGHA:
14686 case R_PPC64_DTPREL16_HIGHER:
14687 case R_PPC64_DTPREL16_HIGHERA:
14688 case R_PPC64_DTPREL16_HIGHEST:
14689 case R_PPC64_DTPREL16_HIGHESTA:
14690 if (htab->elf.tls_sec != NULL)
14691 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
14692 break;
14693
14694 case R_PPC64_ADDR64_LOCAL:
14695 addend += PPC64_LOCAL_ENTRY_OFFSET (h != NULL
14696 ? h->elf.other
14697 : sym->st_other);
14698 break;
14699
14700 case R_PPC64_DTPMOD64:
14701 relocation = 1;
14702 addend = 0;
14703 goto dodyn;
14704
14705 case R_PPC64_TPREL64:
14706 if (htab->elf.tls_sec != NULL)
14707 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
14708 goto dodyn;
14709
14710 case R_PPC64_DTPREL64:
14711 if (htab->elf.tls_sec != NULL)
14712 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
14713 /* Fall thru */
14714
14715 /* Relocations that may need to be propagated if this is a
14716 dynamic object. */
14717 case R_PPC64_REL30:
14718 case R_PPC64_REL32:
14719 case R_PPC64_REL64:
14720 case R_PPC64_ADDR14:
14721 case R_PPC64_ADDR14_BRNTAKEN:
14722 case R_PPC64_ADDR14_BRTAKEN:
14723 case R_PPC64_ADDR16:
14724 case R_PPC64_ADDR16_DS:
14725 case R_PPC64_ADDR16_HA:
14726 case R_PPC64_ADDR16_HI:
14727 case R_PPC64_ADDR16_HIGH:
14728 case R_PPC64_ADDR16_HIGHA:
14729 case R_PPC64_ADDR16_HIGHER:
14730 case R_PPC64_ADDR16_HIGHERA:
14731 case R_PPC64_ADDR16_HIGHEST:
14732 case R_PPC64_ADDR16_HIGHESTA:
14733 case R_PPC64_ADDR16_LO:
14734 case R_PPC64_ADDR16_LO_DS:
14735 case R_PPC64_ADDR24:
14736 case R_PPC64_ADDR32:
14737 case R_PPC64_ADDR64:
14738 case R_PPC64_UADDR16:
14739 case R_PPC64_UADDR32:
14740 case R_PPC64_UADDR64:
14741 dodyn:
14742 if ((input_section->flags & SEC_ALLOC) == 0)
14743 break;
14744
14745 if (NO_OPD_RELOCS && is_opd)
14746 break;
14747
14748 if (h != NULL
14749 ? h->dyn_relocs != NULL
14750 : (bfd_link_pic (info)
14751 ? must_be_dyn_reloc (info, r_type)
14752 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
14753 {
14754 bfd_boolean skip, relocate;
14755 asection *sreloc;
14756 bfd_vma out_off;
14757
14758 /* When generating a dynamic object, these relocations
14759 are copied into the output file to be resolved at run
14760 time. */
14761
14762 skip = FALSE;
14763 relocate = FALSE;
14764
14765 out_off = _bfd_elf_section_offset (output_bfd, info,
14766 input_section, rel->r_offset);
14767 if (out_off == (bfd_vma) -1)
14768 skip = TRUE;
14769 else if (out_off == (bfd_vma) -2)
14770 skip = TRUE, relocate = TRUE;
14771 out_off += (input_section->output_section->vma
14772 + input_section->output_offset);
14773 outrel.r_offset = out_off;
14774 outrel.r_addend = rel->r_addend;
14775
14776 /* Optimize unaligned reloc use. */
14777 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
14778 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
14779 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
14780 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
14781 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
14782 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
14783 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
14784 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
14785 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
14786
14787 if (skip)
14788 memset (&outrel, 0, sizeof outrel);
14789 else if (!SYMBOL_REFERENCES_LOCAL (info, &h->elf)
14790 && !is_opd
14791 && r_type != R_PPC64_TOC)
14792 {
14793 BFD_ASSERT (h->elf.dynindx != -1);
14794 outrel.r_info = ELF64_R_INFO (h->elf.dynindx, r_type);
14795 }
14796 else
14797 {
14798 /* This symbol is local, or marked to become local,
14799 or this is an opd section reloc which must point
14800 at a local function. */
14801 outrel.r_addend += relocation;
14802 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
14803 {
14804 if (is_opd && h != NULL)
14805 {
14806 /* Lie about opd entries. This case occurs
14807 when building shared libraries and we
14808 reference a function in another shared
14809 lib. The same thing happens for a weak
14810 definition in an application that's
14811 overridden by a strong definition in a
14812 shared lib. (I believe this is a generic
14813 bug in binutils handling of weak syms.)
14814 In these cases we won't use the opd
14815 entry in this lib. */
14816 unresolved_reloc = FALSE;
14817 }
14818 if (!is_opd
14819 && r_type == R_PPC64_ADDR64
14820 && (h != NULL
14821 ? h->elf.type == STT_GNU_IFUNC
14822 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
14823 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
14824 else
14825 {
14826 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
14827
14828 /* We need to relocate .opd contents for ld.so.
14829 Prelink also wants simple and consistent rules
14830 for relocs. This make all RELATIVE relocs have
14831 *r_offset equal to r_addend. */
14832 relocate = TRUE;
14833 }
14834 }
14835 else
14836 {
14837 long indx = 0;
14838
14839 if (h != NULL
14840 ? h->elf.type == STT_GNU_IFUNC
14841 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
14842 {
14843 info->callbacks->einfo
14844 (_("%P: %H: %s for indirect "
14845 "function `%T' unsupported\n"),
14846 input_bfd, input_section, rel->r_offset,
14847 ppc64_elf_howto_table[r_type]->name,
14848 sym_name);
14849 ret = FALSE;
14850 }
14851 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
14852 ;
14853 else if (sec == NULL || sec->owner == NULL)
14854 {
14855 bfd_set_error (bfd_error_bad_value);
14856 return FALSE;
14857 }
14858 else
14859 {
14860 asection *osec;
14861
14862 osec = sec->output_section;
14863 indx = elf_section_data (osec)->dynindx;
14864
14865 if (indx == 0)
14866 {
14867 if ((osec->flags & SEC_READONLY) == 0
14868 && htab->elf.data_index_section != NULL)
14869 osec = htab->elf.data_index_section;
14870 else
14871 osec = htab->elf.text_index_section;
14872 indx = elf_section_data (osec)->dynindx;
14873 }
14874 BFD_ASSERT (indx != 0);
14875
14876 /* We are turning this relocation into one
14877 against a section symbol, so subtract out
14878 the output section's address but not the
14879 offset of the input section in the output
14880 section. */
14881 outrel.r_addend -= osec->vma;
14882 }
14883
14884 outrel.r_info = ELF64_R_INFO (indx, r_type);
14885 }
14886 }
14887
14888 sreloc = elf_section_data (input_section)->sreloc;
14889 if (h != NULL
14890 ? h->elf.type == STT_GNU_IFUNC
14891 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
14892 sreloc = htab->elf.irelplt;
14893 if (sreloc == NULL)
14894 abort ();
14895
14896 if (sreloc->reloc_count * sizeof (Elf64_External_Rela)
14897 >= sreloc->size)
14898 abort ();
14899 loc = sreloc->contents;
14900 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
14901 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
14902
14903 /* If this reloc is against an external symbol, it will
14904 be computed at runtime, so there's no need to do
14905 anything now. However, for the sake of prelink ensure
14906 that the section contents are a known value. */
14907 if (! relocate)
14908 {
14909 unresolved_reloc = FALSE;
14910 /* The value chosen here is quite arbitrary as ld.so
14911 ignores section contents except for the special
14912 case of .opd where the contents might be accessed
14913 before relocation. Choose zero, as that won't
14914 cause reloc overflow. */
14915 relocation = 0;
14916 addend = 0;
14917 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
14918 to improve backward compatibility with older
14919 versions of ld. */
14920 if (r_type == R_PPC64_ADDR64)
14921 addend = outrel.r_addend;
14922 /* Adjust pc_relative relocs to have zero in *r_offset. */
14923 else if (ppc64_elf_howto_table[r_type]->pc_relative)
14924 addend = (input_section->output_section->vma
14925 + input_section->output_offset
14926 + rel->r_offset);
14927 }
14928 }
14929 break;
14930
14931 case R_PPC64_COPY:
14932 case R_PPC64_GLOB_DAT:
14933 case R_PPC64_JMP_SLOT:
14934 case R_PPC64_JMP_IREL:
14935 case R_PPC64_RELATIVE:
14936 /* We shouldn't ever see these dynamic relocs in relocatable
14937 files. */
14938 /* Fall through. */
14939
14940 case R_PPC64_PLTGOT16:
14941 case R_PPC64_PLTGOT16_DS:
14942 case R_PPC64_PLTGOT16_HA:
14943 case R_PPC64_PLTGOT16_HI:
14944 case R_PPC64_PLTGOT16_LO:
14945 case R_PPC64_PLTGOT16_LO_DS:
14946 case R_PPC64_PLTREL32:
14947 case R_PPC64_PLTREL64:
14948 /* These ones haven't been implemented yet. */
14949
14950 info->callbacks->einfo
14951 (_("%P: %B: %s is not supported for `%T'\n"),
14952 input_bfd,
14953 ppc64_elf_howto_table[r_type]->name, sym_name);
14954
14955 bfd_set_error (bfd_error_invalid_operation);
14956 ret = FALSE;
14957 goto copy_reloc;
14958 }
14959
14960 /* Multi-instruction sequences that access the TOC can be
14961 optimized, eg. addis ra,r2,0; addi rb,ra,x;
14962 to nop; addi rb,r2,x; */
14963 switch (r_type)
14964 {
14965 default:
14966 break;
14967
14968 case R_PPC64_GOT_TLSLD16_HI:
14969 case R_PPC64_GOT_TLSGD16_HI:
14970 case R_PPC64_GOT_TPREL16_HI:
14971 case R_PPC64_GOT_DTPREL16_HI:
14972 case R_PPC64_GOT16_HI:
14973 case R_PPC64_TOC16_HI:
14974 /* These relocs would only be useful if building up an
14975 offset to later add to r2, perhaps in an indexed
14976 addressing mode instruction. Don't try to optimize.
14977 Unfortunately, the possibility of someone building up an
14978 offset like this or even with the HA relocs, means that
14979 we need to check the high insn when optimizing the low
14980 insn. */
14981 break;
14982
14983 case R_PPC64_GOT_TLSLD16_HA:
14984 case R_PPC64_GOT_TLSGD16_HA:
14985 case R_PPC64_GOT_TPREL16_HA:
14986 case R_PPC64_GOT_DTPREL16_HA:
14987 case R_PPC64_GOT16_HA:
14988 case R_PPC64_TOC16_HA:
14989 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
14990 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
14991 {
14992 bfd_byte *p = contents + (rel->r_offset & ~3);
14993 bfd_put_32 (input_bfd, NOP, p);
14994 }
14995 break;
14996
14997 case R_PPC64_GOT_TLSLD16_LO:
14998 case R_PPC64_GOT_TLSGD16_LO:
14999 case R_PPC64_GOT_TPREL16_LO_DS:
15000 case R_PPC64_GOT_DTPREL16_LO_DS:
15001 case R_PPC64_GOT16_LO:
15002 case R_PPC64_GOT16_LO_DS:
15003 case R_PPC64_TOC16_LO:
15004 case R_PPC64_TOC16_LO_DS:
15005 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
15006 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
15007 {
15008 bfd_byte *p = contents + (rel->r_offset & ~3);
15009 insn = bfd_get_32 (input_bfd, p);
15010 if ((insn & (0x3f << 26)) == 12u << 26 /* addic */)
15011 {
15012 /* Transform addic to addi when we change reg. */
15013 insn &= ~((0x3f << 26) | (0x1f << 16));
15014 insn |= (14u << 26) | (2 << 16);
15015 }
15016 else
15017 {
15018 insn &= ~(0x1f << 16);
15019 insn |= 2 << 16;
15020 }
15021 bfd_put_32 (input_bfd, insn, p);
15022 }
15023 break;
15024 }
15025
15026 /* Do any further special processing. */
15027 howto = ppc64_elf_howto_table[(int) r_type];
15028 switch (r_type)
15029 {
15030 default:
15031 break;
15032
15033 case R_PPC64_REL16_HA:
15034 case R_PPC64_REL16DX_HA:
15035 case R_PPC64_ADDR16_HA:
15036 case R_PPC64_ADDR16_HIGHA:
15037 case R_PPC64_ADDR16_HIGHERA:
15038 case R_PPC64_ADDR16_HIGHESTA:
15039 case R_PPC64_TOC16_HA:
15040 case R_PPC64_SECTOFF_HA:
15041 case R_PPC64_TPREL16_HA:
15042 case R_PPC64_TPREL16_HIGHA:
15043 case R_PPC64_TPREL16_HIGHERA:
15044 case R_PPC64_TPREL16_HIGHESTA:
15045 case R_PPC64_DTPREL16_HA:
15046 case R_PPC64_DTPREL16_HIGHA:
15047 case R_PPC64_DTPREL16_HIGHERA:
15048 case R_PPC64_DTPREL16_HIGHESTA:
15049 /* It's just possible that this symbol is a weak symbol
15050 that's not actually defined anywhere. In that case,
15051 'sec' would be NULL, and we should leave the symbol
15052 alone (it will be set to zero elsewhere in the link). */
15053 if (sec == NULL)
15054 break;
15055 /* Fall thru */
15056
15057 case R_PPC64_GOT16_HA:
15058 case R_PPC64_PLTGOT16_HA:
15059 case R_PPC64_PLT16_HA:
15060 case R_PPC64_GOT_TLSGD16_HA:
15061 case R_PPC64_GOT_TLSLD16_HA:
15062 case R_PPC64_GOT_TPREL16_HA:
15063 case R_PPC64_GOT_DTPREL16_HA:
15064 /* Add 0x10000 if sign bit in 0:15 is set.
15065 Bits 0:15 are not used. */
15066 addend += 0x8000;
15067 break;
15068
15069 case R_PPC64_ADDR16_DS:
15070 case R_PPC64_ADDR16_LO_DS:
15071 case R_PPC64_GOT16_DS:
15072 case R_PPC64_GOT16_LO_DS:
15073 case R_PPC64_PLT16_LO_DS:
15074 case R_PPC64_SECTOFF_DS:
15075 case R_PPC64_SECTOFF_LO_DS:
15076 case R_PPC64_TOC16_DS:
15077 case R_PPC64_TOC16_LO_DS:
15078 case R_PPC64_PLTGOT16_DS:
15079 case R_PPC64_PLTGOT16_LO_DS:
15080 case R_PPC64_GOT_TPREL16_DS:
15081 case R_PPC64_GOT_TPREL16_LO_DS:
15082 case R_PPC64_GOT_DTPREL16_DS:
15083 case R_PPC64_GOT_DTPREL16_LO_DS:
15084 case R_PPC64_TPREL16_DS:
15085 case R_PPC64_TPREL16_LO_DS:
15086 case R_PPC64_DTPREL16_DS:
15087 case R_PPC64_DTPREL16_LO_DS:
15088 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
15089 mask = 3;
15090 /* If this reloc is against an lq, lxv, or stxv insn, then
15091 the value must be a multiple of 16. This is somewhat of
15092 a hack, but the "correct" way to do this by defining _DQ
15093 forms of all the _DS relocs bloats all reloc switches in
15094 this file. It doesn't make much sense to use these
15095 relocs in data, so testing the insn should be safe. */
15096 if ((insn & (0x3f << 26)) == (56u << 26)
15097 || ((insn & (0x3f << 26)) == (61u << 26) && (insn & 3) == 1))
15098 mask = 15;
15099 relocation += addend;
15100 addend = insn & (mask ^ 3);
15101 if ((relocation & mask) != 0)
15102 {
15103 relocation ^= relocation & mask;
15104 info->callbacks->einfo
15105 (_("%P: %H: error: %s not a multiple of %u\n"),
15106 input_bfd, input_section, rel->r_offset,
15107 howto->name,
15108 mask + 1);
15109 bfd_set_error (bfd_error_bad_value);
15110 ret = FALSE;
15111 goto copy_reloc;
15112 }
15113 break;
15114 }
15115
15116 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
15117 because such sections are not SEC_ALLOC and thus ld.so will
15118 not process them. */
15119 if (unresolved_reloc
15120 && !((input_section->flags & SEC_DEBUGGING) != 0
15121 && h->elf.def_dynamic)
15122 && _bfd_elf_section_offset (output_bfd, info, input_section,
15123 rel->r_offset) != (bfd_vma) -1)
15124 {
15125 info->callbacks->einfo
15126 (_("%P: %H: unresolvable %s against `%T'\n"),
15127 input_bfd, input_section, rel->r_offset,
15128 howto->name,
15129 h->elf.root.root.string);
15130 ret = FALSE;
15131 }
15132
15133 /* 16-bit fields in insns mostly have signed values, but a
15134 few insns have 16-bit unsigned values. Really, we should
15135 have different reloc types. */
15136 if (howto->complain_on_overflow != complain_overflow_dont
15137 && howto->dst_mask == 0xffff
15138 && (input_section->flags & SEC_CODE) != 0)
15139 {
15140 enum complain_overflow complain = complain_overflow_signed;
15141
15142 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
15143 if ((insn & (0x3f << 26)) == 10u << 26 /* cmpli */)
15144 complain = complain_overflow_bitfield;
15145 else if (howto->rightshift == 0
15146 ? ((insn & (0x3f << 26)) == 28u << 26 /* andi */
15147 || (insn & (0x3f << 26)) == 24u << 26 /* ori */
15148 || (insn & (0x3f << 26)) == 26u << 26 /* xori */)
15149 : ((insn & (0x3f << 26)) == 29u << 26 /* andis */
15150 || (insn & (0x3f << 26)) == 25u << 26 /* oris */
15151 || (insn & (0x3f << 26)) == 27u << 26 /* xoris */))
15152 complain = complain_overflow_unsigned;
15153 if (howto->complain_on_overflow != complain)
15154 {
15155 alt_howto = *howto;
15156 alt_howto.complain_on_overflow = complain;
15157 howto = &alt_howto;
15158 }
15159 }
15160
15161 if (r_type == R_PPC64_REL16DX_HA)
15162 {
15163 /* Split field reloc isn't handled by _bfd_final_link_relocate. */
15164 if (rel->r_offset + 4 > input_section->size)
15165 r = bfd_reloc_outofrange;
15166 else
15167 {
15168 relocation += addend;
15169 relocation -= (rel->r_offset
15170 + input_section->output_offset
15171 + input_section->output_section->vma);
15172 relocation = (bfd_signed_vma) relocation >> 16;
15173 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
15174 insn &= ~0x1fffc1;
15175 insn |= (relocation & 0xffc1) | ((relocation & 0x3e) << 15);
15176 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
15177 r = bfd_reloc_ok;
15178 if (relocation + 0x8000 > 0xffff)
15179 r = bfd_reloc_overflow;
15180 }
15181 }
15182 else
15183 r = _bfd_final_link_relocate (howto, input_bfd, input_section, contents,
15184 rel->r_offset, relocation, addend);
15185
15186 if (r != bfd_reloc_ok)
15187 {
15188 char *more_info = NULL;
15189 const char *reloc_name = howto->name;
15190
15191 if (reloc_dest != DEST_NORMAL)
15192 {
15193 more_info = bfd_malloc (strlen (reloc_name) + 8);
15194 if (more_info != NULL)
15195 {
15196 strcpy (more_info, reloc_name);
15197 strcat (more_info, (reloc_dest == DEST_OPD
15198 ? " (OPD)" : " (stub)"));
15199 reloc_name = more_info;
15200 }
15201 }
15202
15203 if (r == bfd_reloc_overflow)
15204 {
15205 /* On code like "if (foo) foo();" don't report overflow
15206 on a branch to zero when foo is undefined. */
15207 if (!warned
15208 && (reloc_dest == DEST_STUB
15209 || !(h != NULL
15210 && (h->elf.root.type == bfd_link_hash_undefweak
15211 || h->elf.root.type == bfd_link_hash_undefined)
15212 && is_branch_reloc (r_type))))
15213 info->callbacks->reloc_overflow (info, &h->elf.root,
15214 sym_name, reloc_name,
15215 orig_rel.r_addend,
15216 input_bfd, input_section,
15217 rel->r_offset);
15218 }
15219 else
15220 {
15221 info->callbacks->einfo
15222 (_("%P: %H: %s against `%T': error %d\n"),
15223 input_bfd, input_section, rel->r_offset,
15224 reloc_name, sym_name, (int) r);
15225 ret = FALSE;
15226 }
15227 if (more_info != NULL)
15228 free (more_info);
15229 }
15230 copy_reloc:
15231 if (wrel != rel)
15232 *wrel = *rel;
15233 }
15234
15235 if (wrel != rel)
15236 {
15237 Elf_Internal_Shdr *rel_hdr;
15238 size_t deleted = rel - wrel;
15239
15240 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
15241 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
15242 if (rel_hdr->sh_size == 0)
15243 {
15244 /* It is too late to remove an empty reloc section. Leave
15245 one NONE reloc.
15246 ??? What is wrong with an empty section??? */
15247 rel_hdr->sh_size = rel_hdr->sh_entsize;
15248 deleted -= 1;
15249 }
15250 rel_hdr = _bfd_elf_single_rel_hdr (input_section);
15251 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
15252 input_section->reloc_count -= deleted;
15253 }
15254
15255 /* If we're emitting relocations, then shortly after this function
15256 returns, reloc offsets and addends for this section will be
15257 adjusted. Worse, reloc symbol indices will be for the output
15258 file rather than the input. Save a copy of the relocs for
15259 opd_entry_value. */
15260 if (is_opd && (info->emitrelocations || bfd_link_relocatable (info)))
15261 {
15262 bfd_size_type amt;
15263 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
15264 rel = bfd_alloc (input_bfd, amt);
15265 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd.relocs == NULL);
15266 ppc64_elf_tdata (input_bfd)->opd.relocs = rel;
15267 if (rel == NULL)
15268 return FALSE;
15269 memcpy (rel, relocs, amt);
15270 }
15271 return ret;
15272 }
15273
15274 /* Adjust the value of any local symbols in opd sections. */
15275
15276 static int
15277 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
15278 const char *name ATTRIBUTE_UNUSED,
15279 Elf_Internal_Sym *elfsym,
15280 asection *input_sec,
15281 struct elf_link_hash_entry *h)
15282 {
15283 struct _opd_sec_data *opd;
15284 long adjust;
15285 bfd_vma value;
15286
15287 if (h != NULL)
15288 return 1;
15289
15290 opd = get_opd_info (input_sec);
15291 if (opd == NULL || opd->adjust == NULL)
15292 return 1;
15293
15294 value = elfsym->st_value - input_sec->output_offset;
15295 if (!bfd_link_relocatable (info))
15296 value -= input_sec->output_section->vma;
15297
15298 adjust = opd->adjust[OPD_NDX (value)];
15299 if (adjust == -1)
15300 return 2;
15301
15302 elfsym->st_value += adjust;
15303 return 1;
15304 }
15305
15306 /* Finish up dynamic symbol handling. We set the contents of various
15307 dynamic sections here. */
15308
15309 static bfd_boolean
15310 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
15311 struct bfd_link_info *info,
15312 struct elf_link_hash_entry *h,
15313 Elf_Internal_Sym *sym ATTRIBUTE_UNUSED)
15314 {
15315 struct ppc_link_hash_table *htab;
15316 struct plt_entry *ent;
15317 Elf_Internal_Rela rela;
15318 bfd_byte *loc;
15319
15320 htab = ppc_hash_table (info);
15321 if (htab == NULL)
15322 return FALSE;
15323
15324 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
15325 if (ent->plt.offset != (bfd_vma) -1)
15326 {
15327 /* This symbol has an entry in the procedure linkage
15328 table. Set it up. */
15329 if (!htab->elf.dynamic_sections_created
15330 || h->dynindx == -1)
15331 {
15332 BFD_ASSERT (h->type == STT_GNU_IFUNC
15333 && h->def_regular
15334 && (h->root.type == bfd_link_hash_defined
15335 || h->root.type == bfd_link_hash_defweak));
15336 rela.r_offset = (htab->elf.iplt->output_section->vma
15337 + htab->elf.iplt->output_offset
15338 + ent->plt.offset);
15339 if (htab->opd_abi)
15340 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
15341 else
15342 rela.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
15343 rela.r_addend = (h->root.u.def.value
15344 + h->root.u.def.section->output_offset
15345 + h->root.u.def.section->output_section->vma
15346 + ent->addend);
15347 loc = (htab->elf.irelplt->contents
15348 + (htab->elf.irelplt->reloc_count++
15349 * sizeof (Elf64_External_Rela)));
15350 }
15351 else
15352 {
15353 rela.r_offset = (htab->elf.splt->output_section->vma
15354 + htab->elf.splt->output_offset
15355 + ent->plt.offset);
15356 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
15357 rela.r_addend = ent->addend;
15358 loc = (htab->elf.srelplt->contents
15359 + ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE (htab))
15360 / PLT_ENTRY_SIZE (htab) * sizeof (Elf64_External_Rela)));
15361 }
15362 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
15363
15364 if (!htab->opd_abi)
15365 {
15366 if (!h->def_regular)
15367 {
15368 /* Mark the symbol as undefined, rather than as
15369 defined in glink. Leave the value if there were
15370 any relocations where pointer equality matters
15371 (this is a clue for the dynamic linker, to make
15372 function pointer comparisons work between an
15373 application and shared library), otherwise set it
15374 to zero. */
15375 sym->st_shndx = SHN_UNDEF;
15376 if (!h->pointer_equality_needed)
15377 sym->st_value = 0;
15378 else if (!h->ref_regular_nonweak)
15379 {
15380 /* This breaks function pointer comparisons, but
15381 that is better than breaking tests for a NULL
15382 function pointer. */
15383 sym->st_value = 0;
15384 }
15385 }
15386 }
15387 }
15388
15389 if (h->needs_copy)
15390 {
15391 /* This symbol needs a copy reloc. Set it up. */
15392
15393 if (h->dynindx == -1
15394 || (h->root.type != bfd_link_hash_defined
15395 && h->root.type != bfd_link_hash_defweak)
15396 || htab->relbss == NULL)
15397 abort ();
15398
15399 rela.r_offset = (h->root.u.def.value
15400 + h->root.u.def.section->output_section->vma
15401 + h->root.u.def.section->output_offset);
15402 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
15403 rela.r_addend = 0;
15404 loc = htab->relbss->contents;
15405 loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela);
15406 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
15407 }
15408
15409 return TRUE;
15410 }
15411
15412 /* Used to decide how to sort relocs in an optimal manner for the
15413 dynamic linker, before writing them out. */
15414
15415 static enum elf_reloc_type_class
15416 ppc64_elf_reloc_type_class (const struct bfd_link_info *info,
15417 const asection *rel_sec,
15418 const Elf_Internal_Rela *rela)
15419 {
15420 enum elf_ppc64_reloc_type r_type;
15421 struct ppc_link_hash_table *htab = ppc_hash_table (info);
15422
15423 if (rel_sec == htab->elf.irelplt)
15424 return reloc_class_ifunc;
15425
15426 r_type = ELF64_R_TYPE (rela->r_info);
15427 switch (r_type)
15428 {
15429 case R_PPC64_RELATIVE:
15430 return reloc_class_relative;
15431 case R_PPC64_JMP_SLOT:
15432 return reloc_class_plt;
15433 case R_PPC64_COPY:
15434 return reloc_class_copy;
15435 default:
15436 return reloc_class_normal;
15437 }
15438 }
15439
15440 /* Finish up the dynamic sections. */
15441
15442 static bfd_boolean
15443 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
15444 struct bfd_link_info *info)
15445 {
15446 struct ppc_link_hash_table *htab;
15447 bfd *dynobj;
15448 asection *sdyn;
15449
15450 htab = ppc_hash_table (info);
15451 if (htab == NULL)
15452 return FALSE;
15453
15454 dynobj = htab->elf.dynobj;
15455 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
15456
15457 if (htab->elf.dynamic_sections_created)
15458 {
15459 Elf64_External_Dyn *dyncon, *dynconend;
15460
15461 if (sdyn == NULL || htab->elf.sgot == NULL)
15462 abort ();
15463
15464 dyncon = (Elf64_External_Dyn *) sdyn->contents;
15465 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
15466 for (; dyncon < dynconend; dyncon++)
15467 {
15468 Elf_Internal_Dyn dyn;
15469 asection *s;
15470
15471 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
15472
15473 switch (dyn.d_tag)
15474 {
15475 default:
15476 continue;
15477
15478 case DT_PPC64_GLINK:
15479 s = htab->glink;
15480 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15481 /* We stupidly defined DT_PPC64_GLINK to be the start
15482 of glink rather than the first entry point, which is
15483 what ld.so needs, and now have a bigger stub to
15484 support automatic multiple TOCs. */
15485 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 8 * 4;
15486 break;
15487
15488 case DT_PPC64_OPD:
15489 s = bfd_get_section_by_name (output_bfd, ".opd");
15490 if (s == NULL)
15491 continue;
15492 dyn.d_un.d_ptr = s->vma;
15493 break;
15494
15495 case DT_PPC64_OPT:
15496 if (htab->do_multi_toc && htab->multi_toc_needed)
15497 dyn.d_un.d_val |= PPC64_OPT_MULTI_TOC;
15498 break;
15499
15500 case DT_PPC64_OPDSZ:
15501 s = bfd_get_section_by_name (output_bfd, ".opd");
15502 if (s == NULL)
15503 continue;
15504 dyn.d_un.d_val = s->size;
15505 break;
15506
15507 case DT_PLTGOT:
15508 s = htab->elf.splt;
15509 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15510 break;
15511
15512 case DT_JMPREL:
15513 s = htab->elf.srelplt;
15514 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15515 break;
15516
15517 case DT_PLTRELSZ:
15518 dyn.d_un.d_val = htab->elf.srelplt->size;
15519 break;
15520
15521 case DT_RELASZ:
15522 /* Don't count procedure linkage table relocs in the
15523 overall reloc count. */
15524 s = htab->elf.srelplt;
15525 if (s == NULL)
15526 continue;
15527 dyn.d_un.d_val -= s->size;
15528 break;
15529
15530 case DT_RELA:
15531 /* We may not be using the standard ELF linker script.
15532 If .rela.plt is the first .rela section, we adjust
15533 DT_RELA to not include it. */
15534 s = htab->elf.srelplt;
15535 if (s == NULL)
15536 continue;
15537 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
15538 continue;
15539 dyn.d_un.d_ptr += s->size;
15540 break;
15541 }
15542
15543 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
15544 }
15545 }
15546
15547 if (htab->elf.sgot != NULL && htab->elf.sgot->size != 0)
15548 {
15549 /* Fill in the first entry in the global offset table.
15550 We use it to hold the link-time TOCbase. */
15551 bfd_put_64 (output_bfd,
15552 elf_gp (output_bfd) + TOC_BASE_OFF,
15553 htab->elf.sgot->contents);
15554
15555 /* Set .got entry size. */
15556 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 8;
15557 }
15558
15559 if (htab->elf.splt != NULL && htab->elf.splt->size != 0)
15560 {
15561 /* Set .plt entry size. */
15562 elf_section_data (htab->elf.splt->output_section)->this_hdr.sh_entsize
15563 = PLT_ENTRY_SIZE (htab);
15564 }
15565
15566 /* brlt is SEC_LINKER_CREATED, so we need to write out relocs for
15567 brlt ourselves if emitrelocations. */
15568 if (htab->brlt != NULL
15569 && htab->brlt->reloc_count != 0
15570 && !_bfd_elf_link_output_relocs (output_bfd,
15571 htab->brlt,
15572 elf_section_data (htab->brlt)->rela.hdr,
15573 elf_section_data (htab->brlt)->relocs,
15574 NULL))
15575 return FALSE;
15576
15577 if (htab->glink != NULL
15578 && htab->glink->reloc_count != 0
15579 && !_bfd_elf_link_output_relocs (output_bfd,
15580 htab->glink,
15581 elf_section_data (htab->glink)->rela.hdr,
15582 elf_section_data (htab->glink)->relocs,
15583 NULL))
15584 return FALSE;
15585
15586 if (htab->glink_eh_frame != NULL
15587 && htab->glink_eh_frame->size != 0)
15588 {
15589 bfd_vma val;
15590 bfd_byte *p;
15591 asection *stub_sec;
15592
15593 p = htab->glink_eh_frame->contents + sizeof (glink_eh_frame_cie);
15594 for (stub_sec = htab->params->stub_bfd->sections;
15595 stub_sec != NULL;
15596 stub_sec = stub_sec->next)
15597 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
15598 {
15599 /* FDE length. */
15600 p += 4;
15601 /* CIE pointer. */
15602 p += 4;
15603 /* Offset to stub section. */
15604 val = (stub_sec->output_section->vma
15605 + stub_sec->output_offset);
15606 val -= (htab->glink_eh_frame->output_section->vma
15607 + htab->glink_eh_frame->output_offset
15608 + (p - htab->glink_eh_frame->contents));
15609 if (val + 0x80000000 > 0xffffffff)
15610 {
15611 info->callbacks->einfo
15612 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
15613 stub_sec->name);
15614 return FALSE;
15615 }
15616 bfd_put_32 (dynobj, val, p);
15617 p += 4;
15618 /* stub section size. */
15619 p += 4;
15620 /* Augmentation. */
15621 p += 1;
15622 /* Pad. */
15623 p += 7;
15624 }
15625 if (htab->glink != NULL && htab->glink->size != 0)
15626 {
15627 /* FDE length. */
15628 p += 4;
15629 /* CIE pointer. */
15630 p += 4;
15631 /* Offset to .glink. */
15632 val = (htab->glink->output_section->vma
15633 + htab->glink->output_offset
15634 + 8);
15635 val -= (htab->glink_eh_frame->output_section->vma
15636 + htab->glink_eh_frame->output_offset
15637 + (p - htab->glink_eh_frame->contents));
15638 if (val + 0x80000000 > 0xffffffff)
15639 {
15640 info->callbacks->einfo
15641 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
15642 htab->glink->name);
15643 return FALSE;
15644 }
15645 bfd_put_32 (dynobj, val, p);
15646 p += 4;
15647 /* .glink size. */
15648 p += 4;
15649 /* Augmentation. */
15650 p += 1;
15651 /* Ops. */
15652 p += 7;
15653 }
15654
15655 if (htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME
15656 && !_bfd_elf_write_section_eh_frame (output_bfd, info,
15657 htab->glink_eh_frame,
15658 htab->glink_eh_frame->contents))
15659 return FALSE;
15660 }
15661
15662 /* We need to handle writing out multiple GOT sections ourselves,
15663 since we didn't add them to DYNOBJ. We know dynobj is the first
15664 bfd. */
15665 while ((dynobj = dynobj->link.next) != NULL)
15666 {
15667 asection *s;
15668
15669 if (!is_ppc64_elf (dynobj))
15670 continue;
15671
15672 s = ppc64_elf_tdata (dynobj)->got;
15673 if (s != NULL
15674 && s->size != 0
15675 && s->output_section != bfd_abs_section_ptr
15676 && !bfd_set_section_contents (output_bfd, s->output_section,
15677 s->contents, s->output_offset,
15678 s->size))
15679 return FALSE;
15680 s = ppc64_elf_tdata (dynobj)->relgot;
15681 if (s != NULL
15682 && s->size != 0
15683 && s->output_section != bfd_abs_section_ptr
15684 && !bfd_set_section_contents (output_bfd, s->output_section,
15685 s->contents, s->output_offset,
15686 s->size))
15687 return FALSE;
15688 }
15689
15690 return TRUE;
15691 }
15692
15693 #include "elf64-target.h"
15694
15695 /* FreeBSD support */
15696
15697 #undef TARGET_LITTLE_SYM
15698 #undef TARGET_LITTLE_NAME
15699
15700 #undef TARGET_BIG_SYM
15701 #define TARGET_BIG_SYM powerpc_elf64_fbsd_vec
15702 #undef TARGET_BIG_NAME
15703 #define TARGET_BIG_NAME "elf64-powerpc-freebsd"
15704
15705 #undef ELF_OSABI
15706 #define ELF_OSABI ELFOSABI_FREEBSD
15707
15708 #undef elf64_bed
15709 #define elf64_bed elf64_powerpc_fbsd_bed
15710
15711 #include "elf64-target.h"
15712
GDB Binutils - Deliverables
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