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Merge bfd_find_nearest_line variants
[deliverable/binutils-gdb.git] / bfd / elf64-ppc.c
1 /* PowerPC64-specific support for 64-bit ELF.
2 Copyright (C) 1999-2014 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 0x1000
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
142 /* Offset of tp and dtp pointers from start of TLS block. */
143 #define TP_OFFSET 0x7000
144 #define DTP_OFFSET 0x8000
145
146 /* .plt call stub instructions. The normal stub is like this, but
147 sometimes the .plt entry crosses a 64k boundary and we need to
148 insert an addi to adjust r11. */
149 #define STD_R2_0R1 0xf8410000 /* std %r2,0+40(%r1) */
150 #define ADDIS_R11_R2 0x3d620000 /* addis %r11,%r2,xxx@ha */
151 #define LD_R12_0R11 0xe98b0000 /* ld %r12,xxx+0@l(%r11) */
152 #define MTCTR_R12 0x7d8903a6 /* mtctr %r12 */
153 #define LD_R2_0R11 0xe84b0000 /* ld %r2,xxx+8@l(%r11) */
154 #define LD_R11_0R11 0xe96b0000 /* ld %r11,xxx+16@l(%r11) */
155 #define BCTR 0x4e800420 /* bctr */
156
157 #define ADDI_R11_R11 0x396b0000 /* addi %r11,%r11,off@l */
158 #define ADDIS_R2_R2 0x3c420000 /* addis %r2,%r2,off@ha */
159 #define ADDI_R2_R2 0x38420000 /* addi %r2,%r2,off@l */
160
161 #define XOR_R2_R12_R12 0x7d826278 /* xor %r2,%r12,%r12 */
162 #define ADD_R11_R11_R2 0x7d6b1214 /* add %r11,%r11,%r2 */
163 #define XOR_R11_R12_R12 0x7d8b6278 /* xor %r11,%r12,%r12 */
164 #define ADD_R2_R2_R11 0x7c425a14 /* add %r2,%r2,%r11 */
165 #define CMPLDI_R2_0 0x28220000 /* cmpldi %r2,0 */
166 #define BNECTR 0x4ca20420 /* bnectr+ */
167 #define BNECTR_P4 0x4ce20420 /* bnectr+ */
168
169 #define LD_R12_0R2 0xe9820000 /* ld %r12,xxx+0(%r2) */
170 #define LD_R11_0R2 0xe9620000 /* ld %r11,xxx+0(%r2) */
171 #define LD_R2_0R2 0xe8420000 /* ld %r2,xxx+0(%r2) */
172
173 #define LD_R2_0R1 0xe8410000 /* ld %r2,0(%r1) */
174
175 #define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */
176 #define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,xxx@ha */
177 #define LD_R12_0R12 0xe98c0000 /* ld %r12,xxx@l(%r12) */
178
179 /* glink call stub instructions. We enter with the index in R0. */
180 #define GLINK_CALL_STUB_SIZE (16*4)
181 /* 0: */
182 /* .quad plt0-1f */
183 /* __glink: */
184 #define MFLR_R12 0x7d8802a6 /* mflr %12 */
185 #define BCL_20_31 0x429f0005 /* bcl 20,31,1f */
186 /* 1: */
187 #define MFLR_R11 0x7d6802a6 /* mflr %11 */
188 /* ld %2,(0b-1b)(%11) */
189 #define MTLR_R12 0x7d8803a6 /* mtlr %12 */
190 #define ADD_R11_R2_R11 0x7d625a14 /* add %11,%2,%11 */
191 /* ld %12,0(%11) */
192 /* ld %2,8(%11) */
193 /* mtctr %12 */
194 /* ld %11,16(%11) */
195 /* bctr */
196 #define MFLR_R0 0x7c0802a6 /* mflr %r0 */
197 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
198 #define SUB_R12_R12_R11 0x7d8b6050 /* subf %r12,%r11,%r12 */
199 #define ADDI_R0_R12 0x380c0000 /* addi %r0,%r12,0 */
200 #define SRDI_R0_R0_2 0x7800f082 /* rldicl %r0,%r0,62,2 */
201
202 /* Pad with this. */
203 #define NOP 0x60000000
204
205 /* Some other nops. */
206 #define CROR_151515 0x4def7b82
207 #define CROR_313131 0x4ffffb82
208
209 /* .glink entries for the first 32k functions are two instructions. */
210 #define LI_R0_0 0x38000000 /* li %r0,0 */
211 #define B_DOT 0x48000000 /* b . */
212
213 /* After that, we need two instructions to load the index, followed by
214 a branch. */
215 #define LIS_R0_0 0x3c000000 /* lis %r0,0 */
216 #define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
217
218 /* Instructions used by the save and restore reg functions. */
219 #define STD_R0_0R1 0xf8010000 /* std %r0,0(%r1) */
220 #define STD_R0_0R12 0xf80c0000 /* std %r0,0(%r12) */
221 #define LD_R0_0R1 0xe8010000 /* ld %r0,0(%r1) */
222 #define LD_R0_0R12 0xe80c0000 /* ld %r0,0(%r12) */
223 #define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
224 #define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
225 #define LI_R12_0 0x39800000 /* li %r12,0 */
226 #define STVX_VR0_R12_R0 0x7c0c01ce /* stvx %v0,%r12,%r0 */
227 #define LVX_VR0_R12_R0 0x7c0c00ce /* lvx %v0,%r12,%r0 */
228 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
229 #define BLR 0x4e800020 /* blr */
230
231 /* Since .opd is an array of descriptors and each entry will end up
232 with identical R_PPC64_RELATIVE relocs, there is really no need to
233 propagate .opd relocs; The dynamic linker should be taught to
234 relocate .opd without reloc entries. */
235 #ifndef NO_OPD_RELOCS
236 #define NO_OPD_RELOCS 0
237 #endif
238
239 static inline int
240 abiversion (bfd *abfd)
241 {
242 return elf_elfheader (abfd)->e_flags & EF_PPC64_ABI;
243 }
244
245 static inline void
246 set_abiversion (bfd *abfd, int ver)
247 {
248 elf_elfheader (abfd)->e_flags &= ~EF_PPC64_ABI;
249 elf_elfheader (abfd)->e_flags |= ver & EF_PPC64_ABI;
250 }
251 \f
252 #define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1)
253
254 /* Relocation HOWTO's. */
255 static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max];
256
257 static reloc_howto_type ppc64_elf_howto_raw[] = {
258 /* This reloc does nothing. */
259 HOWTO (R_PPC64_NONE, /* type */
260 0, /* rightshift */
261 2, /* size (0 = byte, 1 = short, 2 = long) */
262 32, /* bitsize */
263 FALSE, /* pc_relative */
264 0, /* bitpos */
265 complain_overflow_dont, /* complain_on_overflow */
266 bfd_elf_generic_reloc, /* special_function */
267 "R_PPC64_NONE", /* name */
268 FALSE, /* partial_inplace */
269 0, /* src_mask */
270 0, /* dst_mask */
271 FALSE), /* pcrel_offset */
272
273 /* A standard 32 bit relocation. */
274 HOWTO (R_PPC64_ADDR32, /* type */
275 0, /* rightshift */
276 2, /* size (0 = byte, 1 = short, 2 = long) */
277 32, /* bitsize */
278 FALSE, /* pc_relative */
279 0, /* bitpos */
280 complain_overflow_bitfield, /* complain_on_overflow */
281 bfd_elf_generic_reloc, /* special_function */
282 "R_PPC64_ADDR32", /* name */
283 FALSE, /* partial_inplace */
284 0, /* src_mask */
285 0xffffffff, /* dst_mask */
286 FALSE), /* pcrel_offset */
287
288 /* An absolute 26 bit branch; the lower two bits must be zero.
289 FIXME: we don't check that, we just clear them. */
290 HOWTO (R_PPC64_ADDR24, /* type */
291 0, /* rightshift */
292 2, /* size (0 = byte, 1 = short, 2 = long) */
293 26, /* bitsize */
294 FALSE, /* pc_relative */
295 0, /* bitpos */
296 complain_overflow_bitfield, /* complain_on_overflow */
297 bfd_elf_generic_reloc, /* special_function */
298 "R_PPC64_ADDR24", /* name */
299 FALSE, /* partial_inplace */
300 0, /* src_mask */
301 0x03fffffc, /* dst_mask */
302 FALSE), /* pcrel_offset */
303
304 /* A standard 16 bit relocation. */
305 HOWTO (R_PPC64_ADDR16, /* type */
306 0, /* rightshift */
307 1, /* size (0 = byte, 1 = short, 2 = long) */
308 16, /* bitsize */
309 FALSE, /* pc_relative */
310 0, /* bitpos */
311 complain_overflow_bitfield, /* complain_on_overflow */
312 bfd_elf_generic_reloc, /* special_function */
313 "R_PPC64_ADDR16", /* name */
314 FALSE, /* partial_inplace */
315 0, /* src_mask */
316 0xffff, /* dst_mask */
317 FALSE), /* pcrel_offset */
318
319 /* A 16 bit relocation without overflow. */
320 HOWTO (R_PPC64_ADDR16_LO, /* type */
321 0, /* rightshift */
322 1, /* size (0 = byte, 1 = short, 2 = long) */
323 16, /* bitsize */
324 FALSE, /* pc_relative */
325 0, /* bitpos */
326 complain_overflow_dont,/* complain_on_overflow */
327 bfd_elf_generic_reloc, /* special_function */
328 "R_PPC64_ADDR16_LO", /* name */
329 FALSE, /* partial_inplace */
330 0, /* src_mask */
331 0xffff, /* dst_mask */
332 FALSE), /* pcrel_offset */
333
334 /* Bits 16-31 of an address. */
335 HOWTO (R_PPC64_ADDR16_HI, /* type */
336 16, /* rightshift */
337 1, /* size (0 = byte, 1 = short, 2 = long) */
338 16, /* bitsize */
339 FALSE, /* pc_relative */
340 0, /* bitpos */
341 complain_overflow_signed, /* complain_on_overflow */
342 bfd_elf_generic_reloc, /* special_function */
343 "R_PPC64_ADDR16_HI", /* name */
344 FALSE, /* partial_inplace */
345 0, /* src_mask */
346 0xffff, /* dst_mask */
347 FALSE), /* pcrel_offset */
348
349 /* Bits 16-31 of an address, plus 1 if the contents of the low 16
350 bits, treated as a signed number, is negative. */
351 HOWTO (R_PPC64_ADDR16_HA, /* type */
352 16, /* rightshift */
353 1, /* size (0 = byte, 1 = short, 2 = long) */
354 16, /* bitsize */
355 FALSE, /* pc_relative */
356 0, /* bitpos */
357 complain_overflow_signed, /* complain_on_overflow */
358 ppc64_elf_ha_reloc, /* special_function */
359 "R_PPC64_ADDR16_HA", /* name */
360 FALSE, /* partial_inplace */
361 0, /* src_mask */
362 0xffff, /* dst_mask */
363 FALSE), /* pcrel_offset */
364
365 /* An absolute 16 bit branch; the lower two bits must be zero.
366 FIXME: we don't check that, we just clear them. */
367 HOWTO (R_PPC64_ADDR14, /* type */
368 0, /* rightshift */
369 2, /* size (0 = byte, 1 = short, 2 = long) */
370 16, /* bitsize */
371 FALSE, /* pc_relative */
372 0, /* bitpos */
373 complain_overflow_signed, /* complain_on_overflow */
374 ppc64_elf_branch_reloc, /* special_function */
375 "R_PPC64_ADDR14", /* name */
376 FALSE, /* partial_inplace */
377 0, /* src_mask */
378 0x0000fffc, /* dst_mask */
379 FALSE), /* pcrel_offset */
380
381 /* An absolute 16 bit branch, for which bit 10 should be set to
382 indicate that the branch is expected to be taken. The lower two
383 bits must be zero. */
384 HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */
385 0, /* rightshift */
386 2, /* size (0 = byte, 1 = short, 2 = long) */
387 16, /* bitsize */
388 FALSE, /* pc_relative */
389 0, /* bitpos */
390 complain_overflow_signed, /* complain_on_overflow */
391 ppc64_elf_brtaken_reloc, /* special_function */
392 "R_PPC64_ADDR14_BRTAKEN",/* name */
393 FALSE, /* partial_inplace */
394 0, /* src_mask */
395 0x0000fffc, /* dst_mask */
396 FALSE), /* pcrel_offset */
397
398 /* An absolute 16 bit branch, for which bit 10 should be set to
399 indicate that the branch is not expected to be taken. The lower
400 two bits must be zero. */
401 HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */
402 0, /* rightshift */
403 2, /* size (0 = byte, 1 = short, 2 = long) */
404 16, /* bitsize */
405 FALSE, /* pc_relative */
406 0, /* bitpos */
407 complain_overflow_signed, /* complain_on_overflow */
408 ppc64_elf_brtaken_reloc, /* special_function */
409 "R_PPC64_ADDR14_BRNTAKEN",/* name */
410 FALSE, /* partial_inplace */
411 0, /* src_mask */
412 0x0000fffc, /* dst_mask */
413 FALSE), /* pcrel_offset */
414
415 /* A relative 26 bit branch; the lower two bits must be zero. */
416 HOWTO (R_PPC64_REL24, /* type */
417 0, /* rightshift */
418 2, /* size (0 = byte, 1 = short, 2 = long) */
419 26, /* bitsize */
420 TRUE, /* pc_relative */
421 0, /* bitpos */
422 complain_overflow_signed, /* complain_on_overflow */
423 ppc64_elf_branch_reloc, /* special_function */
424 "R_PPC64_REL24", /* name */
425 FALSE, /* partial_inplace */
426 0, /* src_mask */
427 0x03fffffc, /* dst_mask */
428 TRUE), /* pcrel_offset */
429
430 /* A relative 16 bit branch; the lower two bits must be zero. */
431 HOWTO (R_PPC64_REL14, /* type */
432 0, /* rightshift */
433 2, /* size (0 = byte, 1 = short, 2 = long) */
434 16, /* bitsize */
435 TRUE, /* pc_relative */
436 0, /* bitpos */
437 complain_overflow_signed, /* complain_on_overflow */
438 ppc64_elf_branch_reloc, /* special_function */
439 "R_PPC64_REL14", /* name */
440 FALSE, /* partial_inplace */
441 0, /* src_mask */
442 0x0000fffc, /* dst_mask */
443 TRUE), /* pcrel_offset */
444
445 /* A relative 16 bit branch. Bit 10 should be set to indicate that
446 the branch is expected to be taken. The lower two bits must be
447 zero. */
448 HOWTO (R_PPC64_REL14_BRTAKEN, /* type */
449 0, /* rightshift */
450 2, /* size (0 = byte, 1 = short, 2 = long) */
451 16, /* bitsize */
452 TRUE, /* pc_relative */
453 0, /* bitpos */
454 complain_overflow_signed, /* complain_on_overflow */
455 ppc64_elf_brtaken_reloc, /* special_function */
456 "R_PPC64_REL14_BRTAKEN", /* name */
457 FALSE, /* partial_inplace */
458 0, /* src_mask */
459 0x0000fffc, /* dst_mask */
460 TRUE), /* pcrel_offset */
461
462 /* A relative 16 bit branch. Bit 10 should be set to indicate that
463 the branch is not expected to be taken. The lower two bits must
464 be zero. */
465 HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */
466 0, /* rightshift */
467 2, /* size (0 = byte, 1 = short, 2 = long) */
468 16, /* bitsize */
469 TRUE, /* pc_relative */
470 0, /* bitpos */
471 complain_overflow_signed, /* complain_on_overflow */
472 ppc64_elf_brtaken_reloc, /* special_function */
473 "R_PPC64_REL14_BRNTAKEN",/* name */
474 FALSE, /* partial_inplace */
475 0, /* src_mask */
476 0x0000fffc, /* dst_mask */
477 TRUE), /* pcrel_offset */
478
479 /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
480 symbol. */
481 HOWTO (R_PPC64_GOT16, /* type */
482 0, /* rightshift */
483 1, /* size (0 = byte, 1 = short, 2 = long) */
484 16, /* bitsize */
485 FALSE, /* pc_relative */
486 0, /* bitpos */
487 complain_overflow_signed, /* complain_on_overflow */
488 ppc64_elf_unhandled_reloc, /* special_function */
489 "R_PPC64_GOT16", /* name */
490 FALSE, /* partial_inplace */
491 0, /* src_mask */
492 0xffff, /* dst_mask */
493 FALSE), /* pcrel_offset */
494
495 /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
496 the symbol. */
497 HOWTO (R_PPC64_GOT16_LO, /* type */
498 0, /* rightshift */
499 1, /* size (0 = byte, 1 = short, 2 = long) */
500 16, /* bitsize */
501 FALSE, /* pc_relative */
502 0, /* bitpos */
503 complain_overflow_dont, /* complain_on_overflow */
504 ppc64_elf_unhandled_reloc, /* special_function */
505 "R_PPC64_GOT16_LO", /* name */
506 FALSE, /* partial_inplace */
507 0, /* src_mask */
508 0xffff, /* dst_mask */
509 FALSE), /* pcrel_offset */
510
511 /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
512 the symbol. */
513 HOWTO (R_PPC64_GOT16_HI, /* type */
514 16, /* rightshift */
515 1, /* size (0 = byte, 1 = short, 2 = long) */
516 16, /* bitsize */
517 FALSE, /* pc_relative */
518 0, /* bitpos */
519 complain_overflow_signed,/* complain_on_overflow */
520 ppc64_elf_unhandled_reloc, /* special_function */
521 "R_PPC64_GOT16_HI", /* name */
522 FALSE, /* partial_inplace */
523 0, /* src_mask */
524 0xffff, /* dst_mask */
525 FALSE), /* pcrel_offset */
526
527 /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
528 the symbol. */
529 HOWTO (R_PPC64_GOT16_HA, /* type */
530 16, /* rightshift */
531 1, /* size (0 = byte, 1 = short, 2 = long) */
532 16, /* bitsize */
533 FALSE, /* pc_relative */
534 0, /* bitpos */
535 complain_overflow_signed,/* complain_on_overflow */
536 ppc64_elf_unhandled_reloc, /* special_function */
537 "R_PPC64_GOT16_HA", /* name */
538 FALSE, /* partial_inplace */
539 0, /* src_mask */
540 0xffff, /* dst_mask */
541 FALSE), /* pcrel_offset */
542
543 /* This is used only by the dynamic linker. The symbol should exist
544 both in the object being run and in some shared library. The
545 dynamic linker copies the data addressed by the symbol from the
546 shared library into the object, because the object being
547 run has to have the data at some particular address. */
548 HOWTO (R_PPC64_COPY, /* type */
549 0, /* rightshift */
550 0, /* this one is variable size */
551 0, /* bitsize */
552 FALSE, /* pc_relative */
553 0, /* bitpos */
554 complain_overflow_dont, /* complain_on_overflow */
555 ppc64_elf_unhandled_reloc, /* special_function */
556 "R_PPC64_COPY", /* name */
557 FALSE, /* partial_inplace */
558 0, /* src_mask */
559 0, /* dst_mask */
560 FALSE), /* pcrel_offset */
561
562 /* Like R_PPC64_ADDR64, but used when setting global offset table
563 entries. */
564 HOWTO (R_PPC64_GLOB_DAT, /* type */
565 0, /* rightshift */
566 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
567 64, /* bitsize */
568 FALSE, /* pc_relative */
569 0, /* bitpos */
570 complain_overflow_dont, /* complain_on_overflow */
571 ppc64_elf_unhandled_reloc, /* special_function */
572 "R_PPC64_GLOB_DAT", /* name */
573 FALSE, /* partial_inplace */
574 0, /* src_mask */
575 ONES (64), /* dst_mask */
576 FALSE), /* pcrel_offset */
577
578 /* Created by the link editor. Marks a procedure linkage table
579 entry for a symbol. */
580 HOWTO (R_PPC64_JMP_SLOT, /* type */
581 0, /* rightshift */
582 0, /* size (0 = byte, 1 = short, 2 = long) */
583 0, /* bitsize */
584 FALSE, /* pc_relative */
585 0, /* bitpos */
586 complain_overflow_dont, /* complain_on_overflow */
587 ppc64_elf_unhandled_reloc, /* special_function */
588 "R_PPC64_JMP_SLOT", /* name */
589 FALSE, /* partial_inplace */
590 0, /* src_mask */
591 0, /* dst_mask */
592 FALSE), /* pcrel_offset */
593
594 /* Used only by the dynamic linker. When the object is run, this
595 doubleword64 is set to the load address of the object, plus the
596 addend. */
597 HOWTO (R_PPC64_RELATIVE, /* type */
598 0, /* rightshift */
599 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
600 64, /* bitsize */
601 FALSE, /* pc_relative */
602 0, /* bitpos */
603 complain_overflow_dont, /* complain_on_overflow */
604 bfd_elf_generic_reloc, /* special_function */
605 "R_PPC64_RELATIVE", /* name */
606 FALSE, /* partial_inplace */
607 0, /* src_mask */
608 ONES (64), /* dst_mask */
609 FALSE), /* pcrel_offset */
610
611 /* Like R_PPC64_ADDR32, but may be unaligned. */
612 HOWTO (R_PPC64_UADDR32, /* type */
613 0, /* rightshift */
614 2, /* size (0 = byte, 1 = short, 2 = long) */
615 32, /* bitsize */
616 FALSE, /* pc_relative */
617 0, /* bitpos */
618 complain_overflow_bitfield, /* complain_on_overflow */
619 bfd_elf_generic_reloc, /* special_function */
620 "R_PPC64_UADDR32", /* name */
621 FALSE, /* partial_inplace */
622 0, /* src_mask */
623 0xffffffff, /* dst_mask */
624 FALSE), /* pcrel_offset */
625
626 /* Like R_PPC64_ADDR16, but may be unaligned. */
627 HOWTO (R_PPC64_UADDR16, /* type */
628 0, /* rightshift */
629 1, /* size (0 = byte, 1 = short, 2 = long) */
630 16, /* bitsize */
631 FALSE, /* pc_relative */
632 0, /* bitpos */
633 complain_overflow_bitfield, /* complain_on_overflow */
634 bfd_elf_generic_reloc, /* special_function */
635 "R_PPC64_UADDR16", /* name */
636 FALSE, /* partial_inplace */
637 0, /* src_mask */
638 0xffff, /* dst_mask */
639 FALSE), /* pcrel_offset */
640
641 /* 32-bit PC relative. */
642 HOWTO (R_PPC64_REL32, /* type */
643 0, /* rightshift */
644 2, /* size (0 = byte, 1 = short, 2 = long) */
645 32, /* bitsize */
646 TRUE, /* pc_relative */
647 0, /* bitpos */
648 complain_overflow_signed, /* complain_on_overflow */
649 bfd_elf_generic_reloc, /* special_function */
650 "R_PPC64_REL32", /* name */
651 FALSE, /* partial_inplace */
652 0, /* src_mask */
653 0xffffffff, /* dst_mask */
654 TRUE), /* pcrel_offset */
655
656 /* 32-bit relocation to the symbol's procedure linkage table. */
657 HOWTO (R_PPC64_PLT32, /* type */
658 0, /* rightshift */
659 2, /* size (0 = byte, 1 = short, 2 = long) */
660 32, /* bitsize */
661 FALSE, /* pc_relative */
662 0, /* bitpos */
663 complain_overflow_bitfield, /* complain_on_overflow */
664 ppc64_elf_unhandled_reloc, /* special_function */
665 "R_PPC64_PLT32", /* name */
666 FALSE, /* partial_inplace */
667 0, /* src_mask */
668 0xffffffff, /* dst_mask */
669 FALSE), /* pcrel_offset */
670
671 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
672 FIXME: R_PPC64_PLTREL32 not supported. */
673 HOWTO (R_PPC64_PLTREL32, /* type */
674 0, /* rightshift */
675 2, /* size (0 = byte, 1 = short, 2 = long) */
676 32, /* bitsize */
677 TRUE, /* pc_relative */
678 0, /* bitpos */
679 complain_overflow_signed, /* complain_on_overflow */
680 bfd_elf_generic_reloc, /* special_function */
681 "R_PPC64_PLTREL32", /* name */
682 FALSE, /* partial_inplace */
683 0, /* src_mask */
684 0xffffffff, /* dst_mask */
685 TRUE), /* pcrel_offset */
686
687 /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
688 the symbol. */
689 HOWTO (R_PPC64_PLT16_LO, /* type */
690 0, /* rightshift */
691 1, /* size (0 = byte, 1 = short, 2 = long) */
692 16, /* bitsize */
693 FALSE, /* pc_relative */
694 0, /* bitpos */
695 complain_overflow_dont, /* complain_on_overflow */
696 ppc64_elf_unhandled_reloc, /* special_function */
697 "R_PPC64_PLT16_LO", /* name */
698 FALSE, /* partial_inplace */
699 0, /* src_mask */
700 0xffff, /* dst_mask */
701 FALSE), /* pcrel_offset */
702
703 /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
704 the symbol. */
705 HOWTO (R_PPC64_PLT16_HI, /* type */
706 16, /* rightshift */
707 1, /* size (0 = byte, 1 = short, 2 = long) */
708 16, /* bitsize */
709 FALSE, /* pc_relative */
710 0, /* bitpos */
711 complain_overflow_signed, /* complain_on_overflow */
712 ppc64_elf_unhandled_reloc, /* special_function */
713 "R_PPC64_PLT16_HI", /* name */
714 FALSE, /* partial_inplace */
715 0, /* src_mask */
716 0xffff, /* dst_mask */
717 FALSE), /* pcrel_offset */
718
719 /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
720 the symbol. */
721 HOWTO (R_PPC64_PLT16_HA, /* type */
722 16, /* rightshift */
723 1, /* size (0 = byte, 1 = short, 2 = long) */
724 16, /* bitsize */
725 FALSE, /* pc_relative */
726 0, /* bitpos */
727 complain_overflow_signed, /* complain_on_overflow */
728 ppc64_elf_unhandled_reloc, /* special_function */
729 "R_PPC64_PLT16_HA", /* name */
730 FALSE, /* partial_inplace */
731 0, /* src_mask */
732 0xffff, /* dst_mask */
733 FALSE), /* pcrel_offset */
734
735 /* 16-bit section relative relocation. */
736 HOWTO (R_PPC64_SECTOFF, /* type */
737 0, /* rightshift */
738 1, /* size (0 = byte, 1 = short, 2 = long) */
739 16, /* bitsize */
740 FALSE, /* pc_relative */
741 0, /* bitpos */
742 complain_overflow_signed, /* complain_on_overflow */
743 ppc64_elf_sectoff_reloc, /* special_function */
744 "R_PPC64_SECTOFF", /* name */
745 FALSE, /* partial_inplace */
746 0, /* src_mask */
747 0xffff, /* dst_mask */
748 FALSE), /* pcrel_offset */
749
750 /* Like R_PPC64_SECTOFF, but no overflow warning. */
751 HOWTO (R_PPC64_SECTOFF_LO, /* type */
752 0, /* rightshift */
753 1, /* size (0 = byte, 1 = short, 2 = long) */
754 16, /* bitsize */
755 FALSE, /* pc_relative */
756 0, /* bitpos */
757 complain_overflow_dont, /* complain_on_overflow */
758 ppc64_elf_sectoff_reloc, /* special_function */
759 "R_PPC64_SECTOFF_LO", /* name */
760 FALSE, /* partial_inplace */
761 0, /* src_mask */
762 0xffff, /* dst_mask */
763 FALSE), /* pcrel_offset */
764
765 /* 16-bit upper half section relative relocation. */
766 HOWTO (R_PPC64_SECTOFF_HI, /* type */
767 16, /* rightshift */
768 1, /* size (0 = byte, 1 = short, 2 = long) */
769 16, /* bitsize */
770 FALSE, /* pc_relative */
771 0, /* bitpos */
772 complain_overflow_signed, /* complain_on_overflow */
773 ppc64_elf_sectoff_reloc, /* special_function */
774 "R_PPC64_SECTOFF_HI", /* name */
775 FALSE, /* partial_inplace */
776 0, /* src_mask */
777 0xffff, /* dst_mask */
778 FALSE), /* pcrel_offset */
779
780 /* 16-bit upper half adjusted section relative relocation. */
781 HOWTO (R_PPC64_SECTOFF_HA, /* type */
782 16, /* rightshift */
783 1, /* size (0 = byte, 1 = short, 2 = long) */
784 16, /* bitsize */
785 FALSE, /* pc_relative */
786 0, /* bitpos */
787 complain_overflow_signed, /* complain_on_overflow */
788 ppc64_elf_sectoff_ha_reloc, /* special_function */
789 "R_PPC64_SECTOFF_HA", /* name */
790 FALSE, /* partial_inplace */
791 0, /* src_mask */
792 0xffff, /* dst_mask */
793 FALSE), /* pcrel_offset */
794
795 /* Like R_PPC64_REL24 without touching the two least significant bits. */
796 HOWTO (R_PPC64_REL30, /* type */
797 2, /* rightshift */
798 2, /* size (0 = byte, 1 = short, 2 = long) */
799 30, /* bitsize */
800 TRUE, /* pc_relative */
801 0, /* bitpos */
802 complain_overflow_dont, /* complain_on_overflow */
803 bfd_elf_generic_reloc, /* special_function */
804 "R_PPC64_REL30", /* name */
805 FALSE, /* partial_inplace */
806 0, /* src_mask */
807 0xfffffffc, /* dst_mask */
808 TRUE), /* pcrel_offset */
809
810 /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
811
812 /* A standard 64-bit relocation. */
813 HOWTO (R_PPC64_ADDR64, /* type */
814 0, /* rightshift */
815 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
816 64, /* bitsize */
817 FALSE, /* pc_relative */
818 0, /* bitpos */
819 complain_overflow_dont, /* complain_on_overflow */
820 bfd_elf_generic_reloc, /* special_function */
821 "R_PPC64_ADDR64", /* name */
822 FALSE, /* partial_inplace */
823 0, /* src_mask */
824 ONES (64), /* dst_mask */
825 FALSE), /* pcrel_offset */
826
827 /* The bits 32-47 of an address. */
828 HOWTO (R_PPC64_ADDR16_HIGHER, /* type */
829 32, /* rightshift */
830 1, /* size (0 = byte, 1 = short, 2 = long) */
831 16, /* bitsize */
832 FALSE, /* pc_relative */
833 0, /* bitpos */
834 complain_overflow_dont, /* complain_on_overflow */
835 bfd_elf_generic_reloc, /* special_function */
836 "R_PPC64_ADDR16_HIGHER", /* name */
837 FALSE, /* partial_inplace */
838 0, /* src_mask */
839 0xffff, /* dst_mask */
840 FALSE), /* pcrel_offset */
841
842 /* The bits 32-47 of an address, plus 1 if the contents of the low
843 16 bits, treated as a signed number, is negative. */
844 HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */
845 32, /* rightshift */
846 1, /* size (0 = byte, 1 = short, 2 = long) */
847 16, /* bitsize */
848 FALSE, /* pc_relative */
849 0, /* bitpos */
850 complain_overflow_dont, /* complain_on_overflow */
851 ppc64_elf_ha_reloc, /* special_function */
852 "R_PPC64_ADDR16_HIGHERA", /* name */
853 FALSE, /* partial_inplace */
854 0, /* src_mask */
855 0xffff, /* dst_mask */
856 FALSE), /* pcrel_offset */
857
858 /* The bits 48-63 of an address. */
859 HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */
860 48, /* rightshift */
861 1, /* size (0 = byte, 1 = short, 2 = long) */
862 16, /* bitsize */
863 FALSE, /* pc_relative */
864 0, /* bitpos */
865 complain_overflow_dont, /* complain_on_overflow */
866 bfd_elf_generic_reloc, /* special_function */
867 "R_PPC64_ADDR16_HIGHEST", /* name */
868 FALSE, /* partial_inplace */
869 0, /* src_mask */
870 0xffff, /* dst_mask */
871 FALSE), /* pcrel_offset */
872
873 /* The bits 48-63 of an address, plus 1 if the contents of the low
874 16 bits, treated as a signed number, is negative. */
875 HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */
876 48, /* rightshift */
877 1, /* size (0 = byte, 1 = short, 2 = long) */
878 16, /* bitsize */
879 FALSE, /* pc_relative */
880 0, /* bitpos */
881 complain_overflow_dont, /* complain_on_overflow */
882 ppc64_elf_ha_reloc, /* special_function */
883 "R_PPC64_ADDR16_HIGHESTA", /* name */
884 FALSE, /* partial_inplace */
885 0, /* src_mask */
886 0xffff, /* dst_mask */
887 FALSE), /* pcrel_offset */
888
889 /* Like ADDR64, but may be unaligned. */
890 HOWTO (R_PPC64_UADDR64, /* type */
891 0, /* rightshift */
892 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
893 64, /* bitsize */
894 FALSE, /* pc_relative */
895 0, /* bitpos */
896 complain_overflow_dont, /* complain_on_overflow */
897 bfd_elf_generic_reloc, /* special_function */
898 "R_PPC64_UADDR64", /* name */
899 FALSE, /* partial_inplace */
900 0, /* src_mask */
901 ONES (64), /* dst_mask */
902 FALSE), /* pcrel_offset */
903
904 /* 64-bit relative relocation. */
905 HOWTO (R_PPC64_REL64, /* type */
906 0, /* rightshift */
907 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
908 64, /* bitsize */
909 TRUE, /* pc_relative */
910 0, /* bitpos */
911 complain_overflow_dont, /* complain_on_overflow */
912 bfd_elf_generic_reloc, /* special_function */
913 "R_PPC64_REL64", /* name */
914 FALSE, /* partial_inplace */
915 0, /* src_mask */
916 ONES (64), /* dst_mask */
917 TRUE), /* pcrel_offset */
918
919 /* 64-bit relocation to the symbol's procedure linkage table. */
920 HOWTO (R_PPC64_PLT64, /* type */
921 0, /* rightshift */
922 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
923 64, /* bitsize */
924 FALSE, /* pc_relative */
925 0, /* bitpos */
926 complain_overflow_dont, /* complain_on_overflow */
927 ppc64_elf_unhandled_reloc, /* special_function */
928 "R_PPC64_PLT64", /* name */
929 FALSE, /* partial_inplace */
930 0, /* src_mask */
931 ONES (64), /* dst_mask */
932 FALSE), /* pcrel_offset */
933
934 /* 64-bit PC relative relocation to the symbol's procedure linkage
935 table. */
936 /* FIXME: R_PPC64_PLTREL64 not supported. */
937 HOWTO (R_PPC64_PLTREL64, /* type */
938 0, /* rightshift */
939 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
940 64, /* bitsize */
941 TRUE, /* pc_relative */
942 0, /* bitpos */
943 complain_overflow_dont, /* complain_on_overflow */
944 ppc64_elf_unhandled_reloc, /* special_function */
945 "R_PPC64_PLTREL64", /* name */
946 FALSE, /* partial_inplace */
947 0, /* src_mask */
948 ONES (64), /* dst_mask */
949 TRUE), /* pcrel_offset */
950
951 /* 16 bit TOC-relative relocation. */
952
953 /* R_PPC64_TOC16 47 half16* S + A - .TOC. */
954 HOWTO (R_PPC64_TOC16, /* type */
955 0, /* rightshift */
956 1, /* size (0 = byte, 1 = short, 2 = long) */
957 16, /* bitsize */
958 FALSE, /* pc_relative */
959 0, /* bitpos */
960 complain_overflow_signed, /* complain_on_overflow */
961 ppc64_elf_toc_reloc, /* special_function */
962 "R_PPC64_TOC16", /* name */
963 FALSE, /* partial_inplace */
964 0, /* src_mask */
965 0xffff, /* dst_mask */
966 FALSE), /* pcrel_offset */
967
968 /* 16 bit TOC-relative relocation without overflow. */
969
970 /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
971 HOWTO (R_PPC64_TOC16_LO, /* type */
972 0, /* rightshift */
973 1, /* size (0 = byte, 1 = short, 2 = long) */
974 16, /* bitsize */
975 FALSE, /* pc_relative */
976 0, /* bitpos */
977 complain_overflow_dont, /* complain_on_overflow */
978 ppc64_elf_toc_reloc, /* special_function */
979 "R_PPC64_TOC16_LO", /* name */
980 FALSE, /* partial_inplace */
981 0, /* src_mask */
982 0xffff, /* dst_mask */
983 FALSE), /* pcrel_offset */
984
985 /* 16 bit TOC-relative relocation, high 16 bits. */
986
987 /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
988 HOWTO (R_PPC64_TOC16_HI, /* type */
989 16, /* rightshift */
990 1, /* size (0 = byte, 1 = short, 2 = long) */
991 16, /* bitsize */
992 FALSE, /* pc_relative */
993 0, /* bitpos */
994 complain_overflow_signed, /* complain_on_overflow */
995 ppc64_elf_toc_reloc, /* special_function */
996 "R_PPC64_TOC16_HI", /* name */
997 FALSE, /* partial_inplace */
998 0, /* src_mask */
999 0xffff, /* dst_mask */
1000 FALSE), /* pcrel_offset */
1001
1002 /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the
1003 contents of the low 16 bits, treated as a signed number, is
1004 negative. */
1005
1006 /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
1007 HOWTO (R_PPC64_TOC16_HA, /* type */
1008 16, /* rightshift */
1009 1, /* size (0 = byte, 1 = short, 2 = long) */
1010 16, /* bitsize */
1011 FALSE, /* pc_relative */
1012 0, /* bitpos */
1013 complain_overflow_signed, /* complain_on_overflow */
1014 ppc64_elf_toc_ha_reloc, /* special_function */
1015 "R_PPC64_TOC16_HA", /* name */
1016 FALSE, /* partial_inplace */
1017 0, /* src_mask */
1018 0xffff, /* dst_mask */
1019 FALSE), /* pcrel_offset */
1020
1021 /* 64-bit relocation; insert value of TOC base (.TOC.). */
1022
1023 /* R_PPC64_TOC 51 doubleword64 .TOC. */
1024 HOWTO (R_PPC64_TOC, /* type */
1025 0, /* rightshift */
1026 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1027 64, /* bitsize */
1028 FALSE, /* pc_relative */
1029 0, /* bitpos */
1030 complain_overflow_dont, /* complain_on_overflow */
1031 ppc64_elf_toc64_reloc, /* special_function */
1032 "R_PPC64_TOC", /* name */
1033 FALSE, /* partial_inplace */
1034 0, /* src_mask */
1035 ONES (64), /* dst_mask */
1036 FALSE), /* pcrel_offset */
1037
1038 /* Like R_PPC64_GOT16, but also informs the link editor that the
1039 value to relocate may (!) refer to a PLT entry which the link
1040 editor (a) may replace with the symbol value. If the link editor
1041 is unable to fully resolve the symbol, it may (b) create a PLT
1042 entry and store the address to the new PLT entry in the GOT.
1043 This permits lazy resolution of function symbols at run time.
1044 The link editor may also skip all of this and just (c) emit a
1045 R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
1046 /* FIXME: R_PPC64_PLTGOT16 not implemented. */
1047 HOWTO (R_PPC64_PLTGOT16, /* type */
1048 0, /* rightshift */
1049 1, /* size (0 = byte, 1 = short, 2 = long) */
1050 16, /* bitsize */
1051 FALSE, /* pc_relative */
1052 0, /* bitpos */
1053 complain_overflow_signed, /* complain_on_overflow */
1054 ppc64_elf_unhandled_reloc, /* special_function */
1055 "R_PPC64_PLTGOT16", /* name */
1056 FALSE, /* partial_inplace */
1057 0, /* src_mask */
1058 0xffff, /* dst_mask */
1059 FALSE), /* pcrel_offset */
1060
1061 /* Like R_PPC64_PLTGOT16, but without overflow. */
1062 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1063 HOWTO (R_PPC64_PLTGOT16_LO, /* type */
1064 0, /* rightshift */
1065 1, /* size (0 = byte, 1 = short, 2 = long) */
1066 16, /* bitsize */
1067 FALSE, /* pc_relative */
1068 0, /* bitpos */
1069 complain_overflow_dont, /* complain_on_overflow */
1070 ppc64_elf_unhandled_reloc, /* special_function */
1071 "R_PPC64_PLTGOT16_LO", /* name */
1072 FALSE, /* partial_inplace */
1073 0, /* src_mask */
1074 0xffff, /* dst_mask */
1075 FALSE), /* pcrel_offset */
1076
1077 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */
1078 /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */
1079 HOWTO (R_PPC64_PLTGOT16_HI, /* type */
1080 16, /* rightshift */
1081 1, /* size (0 = byte, 1 = short, 2 = long) */
1082 16, /* bitsize */
1083 FALSE, /* pc_relative */
1084 0, /* bitpos */
1085 complain_overflow_signed, /* complain_on_overflow */
1086 ppc64_elf_unhandled_reloc, /* special_function */
1087 "R_PPC64_PLTGOT16_HI", /* name */
1088 FALSE, /* partial_inplace */
1089 0, /* src_mask */
1090 0xffff, /* dst_mask */
1091 FALSE), /* pcrel_offset */
1092
1093 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus
1094 1 if the contents of the low 16 bits, treated as a signed number,
1095 is negative. */
1096 /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */
1097 HOWTO (R_PPC64_PLTGOT16_HA, /* type */
1098 16, /* rightshift */
1099 1, /* size (0 = byte, 1 = short, 2 = long) */
1100 16, /* bitsize */
1101 FALSE, /* pc_relative */
1102 0, /* bitpos */
1103 complain_overflow_signed, /* complain_on_overflow */
1104 ppc64_elf_unhandled_reloc, /* special_function */
1105 "R_PPC64_PLTGOT16_HA", /* name */
1106 FALSE, /* partial_inplace */
1107 0, /* src_mask */
1108 0xffff, /* dst_mask */
1109 FALSE), /* pcrel_offset */
1110
1111 /* Like R_PPC64_ADDR16, but for instructions with a DS field. */
1112 HOWTO (R_PPC64_ADDR16_DS, /* type */
1113 0, /* rightshift */
1114 1, /* size (0 = byte, 1 = short, 2 = long) */
1115 16, /* bitsize */
1116 FALSE, /* pc_relative */
1117 0, /* bitpos */
1118 complain_overflow_signed, /* complain_on_overflow */
1119 bfd_elf_generic_reloc, /* special_function */
1120 "R_PPC64_ADDR16_DS", /* name */
1121 FALSE, /* partial_inplace */
1122 0, /* src_mask */
1123 0xfffc, /* dst_mask */
1124 FALSE), /* pcrel_offset */
1125
1126 /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
1127 HOWTO (R_PPC64_ADDR16_LO_DS, /* type */
1128 0, /* rightshift */
1129 1, /* size (0 = byte, 1 = short, 2 = long) */
1130 16, /* bitsize */
1131 FALSE, /* pc_relative */
1132 0, /* bitpos */
1133 complain_overflow_dont,/* complain_on_overflow */
1134 bfd_elf_generic_reloc, /* special_function */
1135 "R_PPC64_ADDR16_LO_DS",/* name */
1136 FALSE, /* partial_inplace */
1137 0, /* src_mask */
1138 0xfffc, /* dst_mask */
1139 FALSE), /* pcrel_offset */
1140
1141 /* Like R_PPC64_GOT16, but for instructions with a DS field. */
1142 HOWTO (R_PPC64_GOT16_DS, /* type */
1143 0, /* rightshift */
1144 1, /* size (0 = byte, 1 = short, 2 = long) */
1145 16, /* bitsize */
1146 FALSE, /* pc_relative */
1147 0, /* bitpos */
1148 complain_overflow_signed, /* complain_on_overflow */
1149 ppc64_elf_unhandled_reloc, /* special_function */
1150 "R_PPC64_GOT16_DS", /* name */
1151 FALSE, /* partial_inplace */
1152 0, /* src_mask */
1153 0xfffc, /* dst_mask */
1154 FALSE), /* pcrel_offset */
1155
1156 /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
1157 HOWTO (R_PPC64_GOT16_LO_DS, /* type */
1158 0, /* rightshift */
1159 1, /* size (0 = byte, 1 = short, 2 = long) */
1160 16, /* bitsize */
1161 FALSE, /* pc_relative */
1162 0, /* bitpos */
1163 complain_overflow_dont, /* complain_on_overflow */
1164 ppc64_elf_unhandled_reloc, /* special_function */
1165 "R_PPC64_GOT16_LO_DS", /* name */
1166 FALSE, /* partial_inplace */
1167 0, /* src_mask */
1168 0xfffc, /* dst_mask */
1169 FALSE), /* pcrel_offset */
1170
1171 /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
1172 HOWTO (R_PPC64_PLT16_LO_DS, /* type */
1173 0, /* rightshift */
1174 1, /* size (0 = byte, 1 = short, 2 = long) */
1175 16, /* bitsize */
1176 FALSE, /* pc_relative */
1177 0, /* bitpos */
1178 complain_overflow_dont, /* complain_on_overflow */
1179 ppc64_elf_unhandled_reloc, /* special_function */
1180 "R_PPC64_PLT16_LO_DS", /* name */
1181 FALSE, /* partial_inplace */
1182 0, /* src_mask */
1183 0xfffc, /* dst_mask */
1184 FALSE), /* pcrel_offset */
1185
1186 /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
1187 HOWTO (R_PPC64_SECTOFF_DS, /* type */
1188 0, /* rightshift */
1189 1, /* size (0 = byte, 1 = short, 2 = long) */
1190 16, /* bitsize */
1191 FALSE, /* pc_relative */
1192 0, /* bitpos */
1193 complain_overflow_signed, /* complain_on_overflow */
1194 ppc64_elf_sectoff_reloc, /* special_function */
1195 "R_PPC64_SECTOFF_DS", /* name */
1196 FALSE, /* partial_inplace */
1197 0, /* src_mask */
1198 0xfffc, /* dst_mask */
1199 FALSE), /* pcrel_offset */
1200
1201 /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
1202 HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */
1203 0, /* rightshift */
1204 1, /* size (0 = byte, 1 = short, 2 = long) */
1205 16, /* bitsize */
1206 FALSE, /* pc_relative */
1207 0, /* bitpos */
1208 complain_overflow_dont, /* complain_on_overflow */
1209 ppc64_elf_sectoff_reloc, /* special_function */
1210 "R_PPC64_SECTOFF_LO_DS",/* name */
1211 FALSE, /* partial_inplace */
1212 0, /* src_mask */
1213 0xfffc, /* dst_mask */
1214 FALSE), /* pcrel_offset */
1215
1216 /* Like R_PPC64_TOC16, but for instructions with a DS field. */
1217 HOWTO (R_PPC64_TOC16_DS, /* type */
1218 0, /* rightshift */
1219 1, /* size (0 = byte, 1 = short, 2 = long) */
1220 16, /* bitsize */
1221 FALSE, /* pc_relative */
1222 0, /* bitpos */
1223 complain_overflow_signed, /* complain_on_overflow */
1224 ppc64_elf_toc_reloc, /* special_function */
1225 "R_PPC64_TOC16_DS", /* name */
1226 FALSE, /* partial_inplace */
1227 0, /* src_mask */
1228 0xfffc, /* dst_mask */
1229 FALSE), /* pcrel_offset */
1230
1231 /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
1232 HOWTO (R_PPC64_TOC16_LO_DS, /* type */
1233 0, /* rightshift */
1234 1, /* size (0 = byte, 1 = short, 2 = long) */
1235 16, /* bitsize */
1236 FALSE, /* pc_relative */
1237 0, /* bitpos */
1238 complain_overflow_dont, /* complain_on_overflow */
1239 ppc64_elf_toc_reloc, /* special_function */
1240 "R_PPC64_TOC16_LO_DS", /* name */
1241 FALSE, /* partial_inplace */
1242 0, /* src_mask */
1243 0xfffc, /* dst_mask */
1244 FALSE), /* pcrel_offset */
1245
1246 /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
1247 /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
1248 HOWTO (R_PPC64_PLTGOT16_DS, /* type */
1249 0, /* rightshift */
1250 1, /* size (0 = byte, 1 = short, 2 = long) */
1251 16, /* bitsize */
1252 FALSE, /* pc_relative */
1253 0, /* bitpos */
1254 complain_overflow_signed, /* complain_on_overflow */
1255 ppc64_elf_unhandled_reloc, /* special_function */
1256 "R_PPC64_PLTGOT16_DS", /* name */
1257 FALSE, /* partial_inplace */
1258 0, /* src_mask */
1259 0xfffc, /* dst_mask */
1260 FALSE), /* pcrel_offset */
1261
1262 /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */
1263 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1264 HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */
1265 0, /* rightshift */
1266 1, /* size (0 = byte, 1 = short, 2 = long) */
1267 16, /* bitsize */
1268 FALSE, /* pc_relative */
1269 0, /* bitpos */
1270 complain_overflow_dont, /* complain_on_overflow */
1271 ppc64_elf_unhandled_reloc, /* special_function */
1272 "R_PPC64_PLTGOT16_LO_DS",/* name */
1273 FALSE, /* partial_inplace */
1274 0, /* src_mask */
1275 0xfffc, /* dst_mask */
1276 FALSE), /* pcrel_offset */
1277
1278 /* Marker relocs for TLS. */
1279 HOWTO (R_PPC64_TLS,
1280 0, /* rightshift */
1281 2, /* size (0 = byte, 1 = short, 2 = long) */
1282 32, /* bitsize */
1283 FALSE, /* pc_relative */
1284 0, /* bitpos */
1285 complain_overflow_dont, /* complain_on_overflow */
1286 bfd_elf_generic_reloc, /* special_function */
1287 "R_PPC64_TLS", /* name */
1288 FALSE, /* partial_inplace */
1289 0, /* src_mask */
1290 0, /* dst_mask */
1291 FALSE), /* pcrel_offset */
1292
1293 HOWTO (R_PPC64_TLSGD,
1294 0, /* rightshift */
1295 2, /* size (0 = byte, 1 = short, 2 = long) */
1296 32, /* bitsize */
1297 FALSE, /* pc_relative */
1298 0, /* bitpos */
1299 complain_overflow_dont, /* complain_on_overflow */
1300 bfd_elf_generic_reloc, /* special_function */
1301 "R_PPC64_TLSGD", /* name */
1302 FALSE, /* partial_inplace */
1303 0, /* src_mask */
1304 0, /* dst_mask */
1305 FALSE), /* pcrel_offset */
1306
1307 HOWTO (R_PPC64_TLSLD,
1308 0, /* rightshift */
1309 2, /* size (0 = byte, 1 = short, 2 = long) */
1310 32, /* bitsize */
1311 FALSE, /* pc_relative */
1312 0, /* bitpos */
1313 complain_overflow_dont, /* complain_on_overflow */
1314 bfd_elf_generic_reloc, /* special_function */
1315 "R_PPC64_TLSLD", /* name */
1316 FALSE, /* partial_inplace */
1317 0, /* src_mask */
1318 0, /* dst_mask */
1319 FALSE), /* pcrel_offset */
1320
1321 HOWTO (R_PPC64_TOCSAVE,
1322 0, /* rightshift */
1323 2, /* size (0 = byte, 1 = short, 2 = long) */
1324 32, /* bitsize */
1325 FALSE, /* pc_relative */
1326 0, /* bitpos */
1327 complain_overflow_dont, /* complain_on_overflow */
1328 bfd_elf_generic_reloc, /* special_function */
1329 "R_PPC64_TOCSAVE", /* name */
1330 FALSE, /* partial_inplace */
1331 0, /* src_mask */
1332 0, /* dst_mask */
1333 FALSE), /* pcrel_offset */
1334
1335 /* Computes the load module index of the load module that contains the
1336 definition of its TLS sym. */
1337 HOWTO (R_PPC64_DTPMOD64,
1338 0, /* rightshift */
1339 4, /* size (0 = byte, 1 = short, 2 = long) */
1340 64, /* bitsize */
1341 FALSE, /* pc_relative */
1342 0, /* bitpos */
1343 complain_overflow_dont, /* complain_on_overflow */
1344 ppc64_elf_unhandled_reloc, /* special_function */
1345 "R_PPC64_DTPMOD64", /* name */
1346 FALSE, /* partial_inplace */
1347 0, /* src_mask */
1348 ONES (64), /* dst_mask */
1349 FALSE), /* pcrel_offset */
1350
1351 /* Computes a dtv-relative displacement, the difference between the value
1352 of sym+add and the base address of the thread-local storage block that
1353 contains the definition of sym, minus 0x8000. */
1354 HOWTO (R_PPC64_DTPREL64,
1355 0, /* rightshift */
1356 4, /* size (0 = byte, 1 = short, 2 = long) */
1357 64, /* bitsize */
1358 FALSE, /* pc_relative */
1359 0, /* bitpos */
1360 complain_overflow_dont, /* complain_on_overflow */
1361 ppc64_elf_unhandled_reloc, /* special_function */
1362 "R_PPC64_DTPREL64", /* name */
1363 FALSE, /* partial_inplace */
1364 0, /* src_mask */
1365 ONES (64), /* dst_mask */
1366 FALSE), /* pcrel_offset */
1367
1368 /* A 16 bit dtprel reloc. */
1369 HOWTO (R_PPC64_DTPREL16,
1370 0, /* rightshift */
1371 1, /* size (0 = byte, 1 = short, 2 = long) */
1372 16, /* bitsize */
1373 FALSE, /* pc_relative */
1374 0, /* bitpos */
1375 complain_overflow_signed, /* complain_on_overflow */
1376 ppc64_elf_unhandled_reloc, /* special_function */
1377 "R_PPC64_DTPREL16", /* name */
1378 FALSE, /* partial_inplace */
1379 0, /* src_mask */
1380 0xffff, /* dst_mask */
1381 FALSE), /* pcrel_offset */
1382
1383 /* Like DTPREL16, but no overflow. */
1384 HOWTO (R_PPC64_DTPREL16_LO,
1385 0, /* rightshift */
1386 1, /* size (0 = byte, 1 = short, 2 = long) */
1387 16, /* bitsize */
1388 FALSE, /* pc_relative */
1389 0, /* bitpos */
1390 complain_overflow_dont, /* complain_on_overflow */
1391 ppc64_elf_unhandled_reloc, /* special_function */
1392 "R_PPC64_DTPREL16_LO", /* name */
1393 FALSE, /* partial_inplace */
1394 0, /* src_mask */
1395 0xffff, /* dst_mask */
1396 FALSE), /* pcrel_offset */
1397
1398 /* Like DTPREL16_LO, but next higher group of 16 bits. */
1399 HOWTO (R_PPC64_DTPREL16_HI,
1400 16, /* rightshift */
1401 1, /* size (0 = byte, 1 = short, 2 = long) */
1402 16, /* bitsize */
1403 FALSE, /* pc_relative */
1404 0, /* bitpos */
1405 complain_overflow_signed, /* complain_on_overflow */
1406 ppc64_elf_unhandled_reloc, /* special_function */
1407 "R_PPC64_DTPREL16_HI", /* name */
1408 FALSE, /* partial_inplace */
1409 0, /* src_mask */
1410 0xffff, /* dst_mask */
1411 FALSE), /* pcrel_offset */
1412
1413 /* Like DTPREL16_HI, but adjust for low 16 bits. */
1414 HOWTO (R_PPC64_DTPREL16_HA,
1415 16, /* rightshift */
1416 1, /* size (0 = byte, 1 = short, 2 = long) */
1417 16, /* bitsize */
1418 FALSE, /* pc_relative */
1419 0, /* bitpos */
1420 complain_overflow_signed, /* complain_on_overflow */
1421 ppc64_elf_unhandled_reloc, /* special_function */
1422 "R_PPC64_DTPREL16_HA", /* name */
1423 FALSE, /* partial_inplace */
1424 0, /* src_mask */
1425 0xffff, /* dst_mask */
1426 FALSE), /* pcrel_offset */
1427
1428 /* Like DTPREL16_HI, but next higher group of 16 bits. */
1429 HOWTO (R_PPC64_DTPREL16_HIGHER,
1430 32, /* rightshift */
1431 1, /* size (0 = byte, 1 = short, 2 = long) */
1432 16, /* bitsize */
1433 FALSE, /* pc_relative */
1434 0, /* bitpos */
1435 complain_overflow_dont, /* complain_on_overflow */
1436 ppc64_elf_unhandled_reloc, /* special_function */
1437 "R_PPC64_DTPREL16_HIGHER", /* name */
1438 FALSE, /* partial_inplace */
1439 0, /* src_mask */
1440 0xffff, /* dst_mask */
1441 FALSE), /* pcrel_offset */
1442
1443 /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */
1444 HOWTO (R_PPC64_DTPREL16_HIGHERA,
1445 32, /* rightshift */
1446 1, /* size (0 = byte, 1 = short, 2 = long) */
1447 16, /* bitsize */
1448 FALSE, /* pc_relative */
1449 0, /* bitpos */
1450 complain_overflow_dont, /* complain_on_overflow */
1451 ppc64_elf_unhandled_reloc, /* special_function */
1452 "R_PPC64_DTPREL16_HIGHERA", /* name */
1453 FALSE, /* partial_inplace */
1454 0, /* src_mask */
1455 0xffff, /* dst_mask */
1456 FALSE), /* pcrel_offset */
1457
1458 /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */
1459 HOWTO (R_PPC64_DTPREL16_HIGHEST,
1460 48, /* rightshift */
1461 1, /* size (0 = byte, 1 = short, 2 = long) */
1462 16, /* bitsize */
1463 FALSE, /* pc_relative */
1464 0, /* bitpos */
1465 complain_overflow_dont, /* complain_on_overflow */
1466 ppc64_elf_unhandled_reloc, /* special_function */
1467 "R_PPC64_DTPREL16_HIGHEST", /* name */
1468 FALSE, /* partial_inplace */
1469 0, /* src_mask */
1470 0xffff, /* dst_mask */
1471 FALSE), /* pcrel_offset */
1472
1473 /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */
1474 HOWTO (R_PPC64_DTPREL16_HIGHESTA,
1475 48, /* rightshift */
1476 1, /* size (0 = byte, 1 = short, 2 = long) */
1477 16, /* bitsize */
1478 FALSE, /* pc_relative */
1479 0, /* bitpos */
1480 complain_overflow_dont, /* complain_on_overflow */
1481 ppc64_elf_unhandled_reloc, /* special_function */
1482 "R_PPC64_DTPREL16_HIGHESTA", /* name */
1483 FALSE, /* partial_inplace */
1484 0, /* src_mask */
1485 0xffff, /* dst_mask */
1486 FALSE), /* pcrel_offset */
1487
1488 /* Like DTPREL16, but for insns with a DS field. */
1489 HOWTO (R_PPC64_DTPREL16_DS,
1490 0, /* rightshift */
1491 1, /* size (0 = byte, 1 = short, 2 = long) */
1492 16, /* bitsize */
1493 FALSE, /* pc_relative */
1494 0, /* bitpos */
1495 complain_overflow_signed, /* complain_on_overflow */
1496 ppc64_elf_unhandled_reloc, /* special_function */
1497 "R_PPC64_DTPREL16_DS", /* name */
1498 FALSE, /* partial_inplace */
1499 0, /* src_mask */
1500 0xfffc, /* dst_mask */
1501 FALSE), /* pcrel_offset */
1502
1503 /* Like DTPREL16_DS, but no overflow. */
1504 HOWTO (R_PPC64_DTPREL16_LO_DS,
1505 0, /* rightshift */
1506 1, /* size (0 = byte, 1 = short, 2 = long) */
1507 16, /* bitsize */
1508 FALSE, /* pc_relative */
1509 0, /* bitpos */
1510 complain_overflow_dont, /* complain_on_overflow */
1511 ppc64_elf_unhandled_reloc, /* special_function */
1512 "R_PPC64_DTPREL16_LO_DS", /* name */
1513 FALSE, /* partial_inplace */
1514 0, /* src_mask */
1515 0xfffc, /* dst_mask */
1516 FALSE), /* pcrel_offset */
1517
1518 /* Computes a tp-relative displacement, the difference between the value of
1519 sym+add and the value of the thread pointer (r13). */
1520 HOWTO (R_PPC64_TPREL64,
1521 0, /* rightshift */
1522 4, /* size (0 = byte, 1 = short, 2 = long) */
1523 64, /* bitsize */
1524 FALSE, /* pc_relative */
1525 0, /* bitpos */
1526 complain_overflow_dont, /* complain_on_overflow */
1527 ppc64_elf_unhandled_reloc, /* special_function */
1528 "R_PPC64_TPREL64", /* name */
1529 FALSE, /* partial_inplace */
1530 0, /* src_mask */
1531 ONES (64), /* dst_mask */
1532 FALSE), /* pcrel_offset */
1533
1534 /* A 16 bit tprel reloc. */
1535 HOWTO (R_PPC64_TPREL16,
1536 0, /* rightshift */
1537 1, /* size (0 = byte, 1 = short, 2 = long) */
1538 16, /* bitsize */
1539 FALSE, /* pc_relative */
1540 0, /* bitpos */
1541 complain_overflow_signed, /* complain_on_overflow */
1542 ppc64_elf_unhandled_reloc, /* special_function */
1543 "R_PPC64_TPREL16", /* name */
1544 FALSE, /* partial_inplace */
1545 0, /* src_mask */
1546 0xffff, /* dst_mask */
1547 FALSE), /* pcrel_offset */
1548
1549 /* Like TPREL16, but no overflow. */
1550 HOWTO (R_PPC64_TPREL16_LO,
1551 0, /* rightshift */
1552 1, /* size (0 = byte, 1 = short, 2 = long) */
1553 16, /* bitsize */
1554 FALSE, /* pc_relative */
1555 0, /* bitpos */
1556 complain_overflow_dont, /* complain_on_overflow */
1557 ppc64_elf_unhandled_reloc, /* special_function */
1558 "R_PPC64_TPREL16_LO", /* name */
1559 FALSE, /* partial_inplace */
1560 0, /* src_mask */
1561 0xffff, /* dst_mask */
1562 FALSE), /* pcrel_offset */
1563
1564 /* Like TPREL16_LO, but next higher group of 16 bits. */
1565 HOWTO (R_PPC64_TPREL16_HI,
1566 16, /* rightshift */
1567 1, /* size (0 = byte, 1 = short, 2 = long) */
1568 16, /* bitsize */
1569 FALSE, /* pc_relative */
1570 0, /* bitpos */
1571 complain_overflow_signed, /* complain_on_overflow */
1572 ppc64_elf_unhandled_reloc, /* special_function */
1573 "R_PPC64_TPREL16_HI", /* name */
1574 FALSE, /* partial_inplace */
1575 0, /* src_mask */
1576 0xffff, /* dst_mask */
1577 FALSE), /* pcrel_offset */
1578
1579 /* Like TPREL16_HI, but adjust for low 16 bits. */
1580 HOWTO (R_PPC64_TPREL16_HA,
1581 16, /* rightshift */
1582 1, /* size (0 = byte, 1 = short, 2 = long) */
1583 16, /* bitsize */
1584 FALSE, /* pc_relative */
1585 0, /* bitpos */
1586 complain_overflow_signed, /* complain_on_overflow */
1587 ppc64_elf_unhandled_reloc, /* special_function */
1588 "R_PPC64_TPREL16_HA", /* name */
1589 FALSE, /* partial_inplace */
1590 0, /* src_mask */
1591 0xffff, /* dst_mask */
1592 FALSE), /* pcrel_offset */
1593
1594 /* Like TPREL16_HI, but next higher group of 16 bits. */
1595 HOWTO (R_PPC64_TPREL16_HIGHER,
1596 32, /* rightshift */
1597 1, /* size (0 = byte, 1 = short, 2 = long) */
1598 16, /* bitsize */
1599 FALSE, /* pc_relative */
1600 0, /* bitpos */
1601 complain_overflow_dont, /* complain_on_overflow */
1602 ppc64_elf_unhandled_reloc, /* special_function */
1603 "R_PPC64_TPREL16_HIGHER", /* name */
1604 FALSE, /* partial_inplace */
1605 0, /* src_mask */
1606 0xffff, /* dst_mask */
1607 FALSE), /* pcrel_offset */
1608
1609 /* Like TPREL16_HIGHER, but adjust for low 16 bits. */
1610 HOWTO (R_PPC64_TPREL16_HIGHERA,
1611 32, /* rightshift */
1612 1, /* size (0 = byte, 1 = short, 2 = long) */
1613 16, /* bitsize */
1614 FALSE, /* pc_relative */
1615 0, /* bitpos */
1616 complain_overflow_dont, /* complain_on_overflow */
1617 ppc64_elf_unhandled_reloc, /* special_function */
1618 "R_PPC64_TPREL16_HIGHERA", /* name */
1619 FALSE, /* partial_inplace */
1620 0, /* src_mask */
1621 0xffff, /* dst_mask */
1622 FALSE), /* pcrel_offset */
1623
1624 /* Like TPREL16_HIGHER, but next higher group of 16 bits. */
1625 HOWTO (R_PPC64_TPREL16_HIGHEST,
1626 48, /* rightshift */
1627 1, /* size (0 = byte, 1 = short, 2 = long) */
1628 16, /* bitsize */
1629 FALSE, /* pc_relative */
1630 0, /* bitpos */
1631 complain_overflow_dont, /* complain_on_overflow */
1632 ppc64_elf_unhandled_reloc, /* special_function */
1633 "R_PPC64_TPREL16_HIGHEST", /* name */
1634 FALSE, /* partial_inplace */
1635 0, /* src_mask */
1636 0xffff, /* dst_mask */
1637 FALSE), /* pcrel_offset */
1638
1639 /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */
1640 HOWTO (R_PPC64_TPREL16_HIGHESTA,
1641 48, /* rightshift */
1642 1, /* size (0 = byte, 1 = short, 2 = long) */
1643 16, /* bitsize */
1644 FALSE, /* pc_relative */
1645 0, /* bitpos */
1646 complain_overflow_dont, /* complain_on_overflow */
1647 ppc64_elf_unhandled_reloc, /* special_function */
1648 "R_PPC64_TPREL16_HIGHESTA", /* name */
1649 FALSE, /* partial_inplace */
1650 0, /* src_mask */
1651 0xffff, /* dst_mask */
1652 FALSE), /* pcrel_offset */
1653
1654 /* Like TPREL16, but for insns with a DS field. */
1655 HOWTO (R_PPC64_TPREL16_DS,
1656 0, /* rightshift */
1657 1, /* size (0 = byte, 1 = short, 2 = long) */
1658 16, /* bitsize */
1659 FALSE, /* pc_relative */
1660 0, /* bitpos */
1661 complain_overflow_signed, /* complain_on_overflow */
1662 ppc64_elf_unhandled_reloc, /* special_function */
1663 "R_PPC64_TPREL16_DS", /* name */
1664 FALSE, /* partial_inplace */
1665 0, /* src_mask */
1666 0xfffc, /* dst_mask */
1667 FALSE), /* pcrel_offset */
1668
1669 /* Like TPREL16_DS, but no overflow. */
1670 HOWTO (R_PPC64_TPREL16_LO_DS,
1671 0, /* rightshift */
1672 1, /* size (0 = byte, 1 = short, 2 = long) */
1673 16, /* bitsize */
1674 FALSE, /* pc_relative */
1675 0, /* bitpos */
1676 complain_overflow_dont, /* complain_on_overflow */
1677 ppc64_elf_unhandled_reloc, /* special_function */
1678 "R_PPC64_TPREL16_LO_DS", /* name */
1679 FALSE, /* partial_inplace */
1680 0, /* src_mask */
1681 0xfffc, /* dst_mask */
1682 FALSE), /* pcrel_offset */
1683
1684 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1685 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1686 to the first entry relative to the TOC base (r2). */
1687 HOWTO (R_PPC64_GOT_TLSGD16,
1688 0, /* rightshift */
1689 1, /* size (0 = byte, 1 = short, 2 = long) */
1690 16, /* bitsize */
1691 FALSE, /* pc_relative */
1692 0, /* bitpos */
1693 complain_overflow_signed, /* complain_on_overflow */
1694 ppc64_elf_unhandled_reloc, /* special_function */
1695 "R_PPC64_GOT_TLSGD16", /* name */
1696 FALSE, /* partial_inplace */
1697 0, /* src_mask */
1698 0xffff, /* dst_mask */
1699 FALSE), /* pcrel_offset */
1700
1701 /* Like GOT_TLSGD16, but no overflow. */
1702 HOWTO (R_PPC64_GOT_TLSGD16_LO,
1703 0, /* rightshift */
1704 1, /* size (0 = byte, 1 = short, 2 = long) */
1705 16, /* bitsize */
1706 FALSE, /* pc_relative */
1707 0, /* bitpos */
1708 complain_overflow_dont, /* complain_on_overflow */
1709 ppc64_elf_unhandled_reloc, /* special_function */
1710 "R_PPC64_GOT_TLSGD16_LO", /* name */
1711 FALSE, /* partial_inplace */
1712 0, /* src_mask */
1713 0xffff, /* dst_mask */
1714 FALSE), /* pcrel_offset */
1715
1716 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1717 HOWTO (R_PPC64_GOT_TLSGD16_HI,
1718 16, /* rightshift */
1719 1, /* size (0 = byte, 1 = short, 2 = long) */
1720 16, /* bitsize */
1721 FALSE, /* pc_relative */
1722 0, /* bitpos */
1723 complain_overflow_signed, /* complain_on_overflow */
1724 ppc64_elf_unhandled_reloc, /* special_function */
1725 "R_PPC64_GOT_TLSGD16_HI", /* name */
1726 FALSE, /* partial_inplace */
1727 0, /* src_mask */
1728 0xffff, /* dst_mask */
1729 FALSE), /* pcrel_offset */
1730
1731 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1732 HOWTO (R_PPC64_GOT_TLSGD16_HA,
1733 16, /* rightshift */
1734 1, /* size (0 = byte, 1 = short, 2 = long) */
1735 16, /* bitsize */
1736 FALSE, /* pc_relative */
1737 0, /* bitpos */
1738 complain_overflow_signed, /* complain_on_overflow */
1739 ppc64_elf_unhandled_reloc, /* special_function */
1740 "R_PPC64_GOT_TLSGD16_HA", /* name */
1741 FALSE, /* partial_inplace */
1742 0, /* src_mask */
1743 0xffff, /* dst_mask */
1744 FALSE), /* pcrel_offset */
1745
1746 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1747 with values (sym+add)@dtpmod and zero, and computes the offset to the
1748 first entry relative to the TOC base (r2). */
1749 HOWTO (R_PPC64_GOT_TLSLD16,
1750 0, /* rightshift */
1751 1, /* size (0 = byte, 1 = short, 2 = long) */
1752 16, /* bitsize */
1753 FALSE, /* pc_relative */
1754 0, /* bitpos */
1755 complain_overflow_signed, /* complain_on_overflow */
1756 ppc64_elf_unhandled_reloc, /* special_function */
1757 "R_PPC64_GOT_TLSLD16", /* name */
1758 FALSE, /* partial_inplace */
1759 0, /* src_mask */
1760 0xffff, /* dst_mask */
1761 FALSE), /* pcrel_offset */
1762
1763 /* Like GOT_TLSLD16, but no overflow. */
1764 HOWTO (R_PPC64_GOT_TLSLD16_LO,
1765 0, /* rightshift */
1766 1, /* size (0 = byte, 1 = short, 2 = long) */
1767 16, /* bitsize */
1768 FALSE, /* pc_relative */
1769 0, /* bitpos */
1770 complain_overflow_dont, /* complain_on_overflow */
1771 ppc64_elf_unhandled_reloc, /* special_function */
1772 "R_PPC64_GOT_TLSLD16_LO", /* name */
1773 FALSE, /* partial_inplace */
1774 0, /* src_mask */
1775 0xffff, /* dst_mask */
1776 FALSE), /* pcrel_offset */
1777
1778 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1779 HOWTO (R_PPC64_GOT_TLSLD16_HI,
1780 16, /* rightshift */
1781 1, /* size (0 = byte, 1 = short, 2 = long) */
1782 16, /* bitsize */
1783 FALSE, /* pc_relative */
1784 0, /* bitpos */
1785 complain_overflow_signed, /* complain_on_overflow */
1786 ppc64_elf_unhandled_reloc, /* special_function */
1787 "R_PPC64_GOT_TLSLD16_HI", /* name */
1788 FALSE, /* partial_inplace */
1789 0, /* src_mask */
1790 0xffff, /* dst_mask */
1791 FALSE), /* pcrel_offset */
1792
1793 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1794 HOWTO (R_PPC64_GOT_TLSLD16_HA,
1795 16, /* rightshift */
1796 1, /* size (0 = byte, 1 = short, 2 = long) */
1797 16, /* bitsize */
1798 FALSE, /* pc_relative */
1799 0, /* bitpos */
1800 complain_overflow_signed, /* complain_on_overflow */
1801 ppc64_elf_unhandled_reloc, /* special_function */
1802 "R_PPC64_GOT_TLSLD16_HA", /* name */
1803 FALSE, /* partial_inplace */
1804 0, /* src_mask */
1805 0xffff, /* dst_mask */
1806 FALSE), /* pcrel_offset */
1807
1808 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1809 the offset to the entry relative to the TOC base (r2). */
1810 HOWTO (R_PPC64_GOT_DTPREL16_DS,
1811 0, /* rightshift */
1812 1, /* size (0 = byte, 1 = short, 2 = long) */
1813 16, /* bitsize */
1814 FALSE, /* pc_relative */
1815 0, /* bitpos */
1816 complain_overflow_signed, /* complain_on_overflow */
1817 ppc64_elf_unhandled_reloc, /* special_function */
1818 "R_PPC64_GOT_DTPREL16_DS", /* name */
1819 FALSE, /* partial_inplace */
1820 0, /* src_mask */
1821 0xfffc, /* dst_mask */
1822 FALSE), /* pcrel_offset */
1823
1824 /* Like GOT_DTPREL16_DS, but no overflow. */
1825 HOWTO (R_PPC64_GOT_DTPREL16_LO_DS,
1826 0, /* rightshift */
1827 1, /* size (0 = byte, 1 = short, 2 = long) */
1828 16, /* bitsize */
1829 FALSE, /* pc_relative */
1830 0, /* bitpos */
1831 complain_overflow_dont, /* complain_on_overflow */
1832 ppc64_elf_unhandled_reloc, /* special_function */
1833 "R_PPC64_GOT_DTPREL16_LO_DS", /* name */
1834 FALSE, /* partial_inplace */
1835 0, /* src_mask */
1836 0xfffc, /* dst_mask */
1837 FALSE), /* pcrel_offset */
1838
1839 /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */
1840 HOWTO (R_PPC64_GOT_DTPREL16_HI,
1841 16, /* rightshift */
1842 1, /* size (0 = byte, 1 = short, 2 = long) */
1843 16, /* bitsize */
1844 FALSE, /* pc_relative */
1845 0, /* bitpos */
1846 complain_overflow_signed, /* complain_on_overflow */
1847 ppc64_elf_unhandled_reloc, /* special_function */
1848 "R_PPC64_GOT_DTPREL16_HI", /* name */
1849 FALSE, /* partial_inplace */
1850 0, /* src_mask */
1851 0xffff, /* dst_mask */
1852 FALSE), /* pcrel_offset */
1853
1854 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1855 HOWTO (R_PPC64_GOT_DTPREL16_HA,
1856 16, /* rightshift */
1857 1, /* size (0 = byte, 1 = short, 2 = long) */
1858 16, /* bitsize */
1859 FALSE, /* pc_relative */
1860 0, /* bitpos */
1861 complain_overflow_signed, /* complain_on_overflow */
1862 ppc64_elf_unhandled_reloc, /* special_function */
1863 "R_PPC64_GOT_DTPREL16_HA", /* name */
1864 FALSE, /* partial_inplace */
1865 0, /* src_mask */
1866 0xffff, /* dst_mask */
1867 FALSE), /* pcrel_offset */
1868
1869 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1870 offset to the entry relative to the TOC base (r2). */
1871 HOWTO (R_PPC64_GOT_TPREL16_DS,
1872 0, /* rightshift */
1873 1, /* size (0 = byte, 1 = short, 2 = long) */
1874 16, /* bitsize */
1875 FALSE, /* pc_relative */
1876 0, /* bitpos */
1877 complain_overflow_signed, /* complain_on_overflow */
1878 ppc64_elf_unhandled_reloc, /* special_function */
1879 "R_PPC64_GOT_TPREL16_DS", /* name */
1880 FALSE, /* partial_inplace */
1881 0, /* src_mask */
1882 0xfffc, /* dst_mask */
1883 FALSE), /* pcrel_offset */
1884
1885 /* Like GOT_TPREL16_DS, but no overflow. */
1886 HOWTO (R_PPC64_GOT_TPREL16_LO_DS,
1887 0, /* rightshift */
1888 1, /* size (0 = byte, 1 = short, 2 = long) */
1889 16, /* bitsize */
1890 FALSE, /* pc_relative */
1891 0, /* bitpos */
1892 complain_overflow_dont, /* complain_on_overflow */
1893 ppc64_elf_unhandled_reloc, /* special_function */
1894 "R_PPC64_GOT_TPREL16_LO_DS", /* name */
1895 FALSE, /* partial_inplace */
1896 0, /* src_mask */
1897 0xfffc, /* dst_mask */
1898 FALSE), /* pcrel_offset */
1899
1900 /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */
1901 HOWTO (R_PPC64_GOT_TPREL16_HI,
1902 16, /* rightshift */
1903 1, /* size (0 = byte, 1 = short, 2 = long) */
1904 16, /* bitsize */
1905 FALSE, /* pc_relative */
1906 0, /* bitpos */
1907 complain_overflow_signed, /* complain_on_overflow */
1908 ppc64_elf_unhandled_reloc, /* special_function */
1909 "R_PPC64_GOT_TPREL16_HI", /* name */
1910 FALSE, /* partial_inplace */
1911 0, /* src_mask */
1912 0xffff, /* dst_mask */
1913 FALSE), /* pcrel_offset */
1914
1915 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1916 HOWTO (R_PPC64_GOT_TPREL16_HA,
1917 16, /* rightshift */
1918 1, /* size (0 = byte, 1 = short, 2 = long) */
1919 16, /* bitsize */
1920 FALSE, /* pc_relative */
1921 0, /* bitpos */
1922 complain_overflow_signed, /* complain_on_overflow */
1923 ppc64_elf_unhandled_reloc, /* special_function */
1924 "R_PPC64_GOT_TPREL16_HA", /* name */
1925 FALSE, /* partial_inplace */
1926 0, /* src_mask */
1927 0xffff, /* dst_mask */
1928 FALSE), /* pcrel_offset */
1929
1930 HOWTO (R_PPC64_JMP_IREL, /* type */
1931 0, /* rightshift */
1932 0, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1933 0, /* bitsize */
1934 FALSE, /* pc_relative */
1935 0, /* bitpos */
1936 complain_overflow_dont, /* complain_on_overflow */
1937 ppc64_elf_unhandled_reloc, /* special_function */
1938 "R_PPC64_JMP_IREL", /* name */
1939 FALSE, /* partial_inplace */
1940 0, /* src_mask */
1941 0, /* dst_mask */
1942 FALSE), /* pcrel_offset */
1943
1944 HOWTO (R_PPC64_IRELATIVE, /* type */
1945 0, /* rightshift */
1946 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1947 64, /* bitsize */
1948 FALSE, /* pc_relative */
1949 0, /* bitpos */
1950 complain_overflow_dont, /* complain_on_overflow */
1951 bfd_elf_generic_reloc, /* special_function */
1952 "R_PPC64_IRELATIVE", /* name */
1953 FALSE, /* partial_inplace */
1954 0, /* src_mask */
1955 ONES (64), /* dst_mask */
1956 FALSE), /* pcrel_offset */
1957
1958 /* A 16 bit relative relocation. */
1959 HOWTO (R_PPC64_REL16, /* type */
1960 0, /* rightshift */
1961 1, /* size (0 = byte, 1 = short, 2 = long) */
1962 16, /* bitsize */
1963 TRUE, /* pc_relative */
1964 0, /* bitpos */
1965 complain_overflow_signed, /* complain_on_overflow */
1966 bfd_elf_generic_reloc, /* special_function */
1967 "R_PPC64_REL16", /* name */
1968 FALSE, /* partial_inplace */
1969 0, /* src_mask */
1970 0xffff, /* dst_mask */
1971 TRUE), /* pcrel_offset */
1972
1973 /* A 16 bit relative relocation without overflow. */
1974 HOWTO (R_PPC64_REL16_LO, /* type */
1975 0, /* rightshift */
1976 1, /* size (0 = byte, 1 = short, 2 = long) */
1977 16, /* bitsize */
1978 TRUE, /* pc_relative */
1979 0, /* bitpos */
1980 complain_overflow_dont,/* complain_on_overflow */
1981 bfd_elf_generic_reloc, /* special_function */
1982 "R_PPC64_REL16_LO", /* name */
1983 FALSE, /* partial_inplace */
1984 0, /* src_mask */
1985 0xffff, /* dst_mask */
1986 TRUE), /* pcrel_offset */
1987
1988 /* The high order 16 bits of a relative address. */
1989 HOWTO (R_PPC64_REL16_HI, /* type */
1990 16, /* rightshift */
1991 1, /* size (0 = byte, 1 = short, 2 = long) */
1992 16, /* bitsize */
1993 TRUE, /* pc_relative */
1994 0, /* bitpos */
1995 complain_overflow_signed, /* complain_on_overflow */
1996 bfd_elf_generic_reloc, /* special_function */
1997 "R_PPC64_REL16_HI", /* name */
1998 FALSE, /* partial_inplace */
1999 0, /* src_mask */
2000 0xffff, /* dst_mask */
2001 TRUE), /* pcrel_offset */
2002
2003 /* The high order 16 bits of a relative address, plus 1 if the contents of
2004 the low 16 bits, treated as a signed number, is negative. */
2005 HOWTO (R_PPC64_REL16_HA, /* type */
2006 16, /* rightshift */
2007 1, /* size (0 = byte, 1 = short, 2 = long) */
2008 16, /* bitsize */
2009 TRUE, /* pc_relative */
2010 0, /* bitpos */
2011 complain_overflow_signed, /* complain_on_overflow */
2012 ppc64_elf_ha_reloc, /* special_function */
2013 "R_PPC64_REL16_HA", /* name */
2014 FALSE, /* partial_inplace */
2015 0, /* src_mask */
2016 0xffff, /* dst_mask */
2017 TRUE), /* pcrel_offset */
2018
2019 /* Like R_PPC64_ADDR16_HI, but no overflow. */
2020 HOWTO (R_PPC64_ADDR16_HIGH, /* type */
2021 16, /* rightshift */
2022 1, /* size (0 = byte, 1 = short, 2 = long) */
2023 16, /* bitsize */
2024 FALSE, /* pc_relative */
2025 0, /* bitpos */
2026 complain_overflow_dont, /* complain_on_overflow */
2027 bfd_elf_generic_reloc, /* special_function */
2028 "R_PPC64_ADDR16_HIGH", /* name */
2029 FALSE, /* partial_inplace */
2030 0, /* src_mask */
2031 0xffff, /* dst_mask */
2032 FALSE), /* pcrel_offset */
2033
2034 /* Like R_PPC64_ADDR16_HA, but no overflow. */
2035 HOWTO (R_PPC64_ADDR16_HIGHA, /* type */
2036 16, /* rightshift */
2037 1, /* size (0 = byte, 1 = short, 2 = long) */
2038 16, /* bitsize */
2039 FALSE, /* pc_relative */
2040 0, /* bitpos */
2041 complain_overflow_dont, /* complain_on_overflow */
2042 ppc64_elf_ha_reloc, /* special_function */
2043 "R_PPC64_ADDR16_HIGHA", /* name */
2044 FALSE, /* partial_inplace */
2045 0, /* src_mask */
2046 0xffff, /* dst_mask */
2047 FALSE), /* pcrel_offset */
2048
2049 /* Like R_PPC64_DTPREL16_HI, but no overflow. */
2050 HOWTO (R_PPC64_DTPREL16_HIGH,
2051 16, /* rightshift */
2052 1, /* size (0 = byte, 1 = short, 2 = long) */
2053 16, /* bitsize */
2054 FALSE, /* pc_relative */
2055 0, /* bitpos */
2056 complain_overflow_dont, /* complain_on_overflow */
2057 ppc64_elf_unhandled_reloc, /* special_function */
2058 "R_PPC64_DTPREL16_HIGH", /* name */
2059 FALSE, /* partial_inplace */
2060 0, /* src_mask */
2061 0xffff, /* dst_mask */
2062 FALSE), /* pcrel_offset */
2063
2064 /* Like R_PPC64_DTPREL16_HA, but no overflow. */
2065 HOWTO (R_PPC64_DTPREL16_HIGHA,
2066 16, /* rightshift */
2067 1, /* size (0 = byte, 1 = short, 2 = long) */
2068 16, /* bitsize */
2069 FALSE, /* pc_relative */
2070 0, /* bitpos */
2071 complain_overflow_dont, /* complain_on_overflow */
2072 ppc64_elf_unhandled_reloc, /* special_function */
2073 "R_PPC64_DTPREL16_HIGHA", /* name */
2074 FALSE, /* partial_inplace */
2075 0, /* src_mask */
2076 0xffff, /* dst_mask */
2077 FALSE), /* pcrel_offset */
2078
2079 /* Like R_PPC64_TPREL16_HI, but no overflow. */
2080 HOWTO (R_PPC64_TPREL16_HIGH,
2081 16, /* rightshift */
2082 1, /* size (0 = byte, 1 = short, 2 = long) */
2083 16, /* bitsize */
2084 FALSE, /* pc_relative */
2085 0, /* bitpos */
2086 complain_overflow_dont, /* complain_on_overflow */
2087 ppc64_elf_unhandled_reloc, /* special_function */
2088 "R_PPC64_TPREL16_HIGH", /* name */
2089 FALSE, /* partial_inplace */
2090 0, /* src_mask */
2091 0xffff, /* dst_mask */
2092 FALSE), /* pcrel_offset */
2093
2094 /* Like R_PPC64_TPREL16_HA, but no overflow. */
2095 HOWTO (R_PPC64_TPREL16_HIGHA,
2096 16, /* rightshift */
2097 1, /* size (0 = byte, 1 = short, 2 = long) */
2098 16, /* bitsize */
2099 FALSE, /* pc_relative */
2100 0, /* bitpos */
2101 complain_overflow_dont, /* complain_on_overflow */
2102 ppc64_elf_unhandled_reloc, /* special_function */
2103 "R_PPC64_TPREL16_HIGHA", /* name */
2104 FALSE, /* partial_inplace */
2105 0, /* src_mask */
2106 0xffff, /* dst_mask */
2107 FALSE), /* pcrel_offset */
2108
2109 /* Like ADDR64, but use local entry point of function. */
2110 HOWTO (R_PPC64_ADDR64_LOCAL, /* type */
2111 0, /* rightshift */
2112 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
2113 64, /* bitsize */
2114 FALSE, /* pc_relative */
2115 0, /* bitpos */
2116 complain_overflow_dont, /* complain_on_overflow */
2117 bfd_elf_generic_reloc, /* special_function */
2118 "R_PPC64_ADDR64_LOCAL", /* name */
2119 FALSE, /* partial_inplace */
2120 0, /* src_mask */
2121 ONES (64), /* dst_mask */
2122 FALSE), /* pcrel_offset */
2123
2124 /* GNU extension to record C++ vtable hierarchy. */
2125 HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
2126 0, /* rightshift */
2127 0, /* size (0 = byte, 1 = short, 2 = long) */
2128 0, /* bitsize */
2129 FALSE, /* pc_relative */
2130 0, /* bitpos */
2131 complain_overflow_dont, /* complain_on_overflow */
2132 NULL, /* special_function */
2133 "R_PPC64_GNU_VTINHERIT", /* name */
2134 FALSE, /* partial_inplace */
2135 0, /* src_mask */
2136 0, /* dst_mask */
2137 FALSE), /* pcrel_offset */
2138
2139 /* GNU extension to record C++ vtable member usage. */
2140 HOWTO (R_PPC64_GNU_VTENTRY, /* type */
2141 0, /* rightshift */
2142 0, /* size (0 = byte, 1 = short, 2 = long) */
2143 0, /* bitsize */
2144 FALSE, /* pc_relative */
2145 0, /* bitpos */
2146 complain_overflow_dont, /* complain_on_overflow */
2147 NULL, /* special_function */
2148 "R_PPC64_GNU_VTENTRY", /* name */
2149 FALSE, /* partial_inplace */
2150 0, /* src_mask */
2151 0, /* dst_mask */
2152 FALSE), /* pcrel_offset */
2153 };
2154
2155 \f
2156 /* Initialize the ppc64_elf_howto_table, so that linear accesses can
2157 be done. */
2158
2159 static void
2160 ppc_howto_init (void)
2161 {
2162 unsigned int i, type;
2163
2164 for (i = 0;
2165 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
2166 i++)
2167 {
2168 type = ppc64_elf_howto_raw[i].type;
2169 BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
2170 / sizeof (ppc64_elf_howto_table[0])));
2171 ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
2172 }
2173 }
2174
2175 static reloc_howto_type *
2176 ppc64_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2177 bfd_reloc_code_real_type code)
2178 {
2179 enum elf_ppc64_reloc_type r = R_PPC64_NONE;
2180
2181 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2182 /* Initialize howto table if needed. */
2183 ppc_howto_init ();
2184
2185 switch (code)
2186 {
2187 default:
2188 return NULL;
2189
2190 case BFD_RELOC_NONE: r = R_PPC64_NONE;
2191 break;
2192 case BFD_RELOC_32: r = R_PPC64_ADDR32;
2193 break;
2194 case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24;
2195 break;
2196 case BFD_RELOC_16: r = R_PPC64_ADDR16;
2197 break;
2198 case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO;
2199 break;
2200 case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI;
2201 break;
2202 case BFD_RELOC_PPC64_ADDR16_HIGH: r = R_PPC64_ADDR16_HIGH;
2203 break;
2204 case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA;
2205 break;
2206 case BFD_RELOC_PPC64_ADDR16_HIGHA: r = R_PPC64_ADDR16_HIGHA;
2207 break;
2208 case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14;
2209 break;
2210 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN;
2211 break;
2212 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN;
2213 break;
2214 case BFD_RELOC_PPC_B26: r = R_PPC64_REL24;
2215 break;
2216 case BFD_RELOC_PPC_B16: r = R_PPC64_REL14;
2217 break;
2218 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN;
2219 break;
2220 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN;
2221 break;
2222 case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16;
2223 break;
2224 case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO;
2225 break;
2226 case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI;
2227 break;
2228 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA;
2229 break;
2230 case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY;
2231 break;
2232 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT;
2233 break;
2234 case BFD_RELOC_32_PCREL: r = R_PPC64_REL32;
2235 break;
2236 case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32;
2237 break;
2238 case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32;
2239 break;
2240 case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO;
2241 break;
2242 case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI;
2243 break;
2244 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA;
2245 break;
2246 case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF;
2247 break;
2248 case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO;
2249 break;
2250 case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI;
2251 break;
2252 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA;
2253 break;
2254 case BFD_RELOC_CTOR: r = R_PPC64_ADDR64;
2255 break;
2256 case BFD_RELOC_64: r = R_PPC64_ADDR64;
2257 break;
2258 case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER;
2259 break;
2260 case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA;
2261 break;
2262 case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST;
2263 break;
2264 case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA;
2265 break;
2266 case BFD_RELOC_64_PCREL: r = R_PPC64_REL64;
2267 break;
2268 case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64;
2269 break;
2270 case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64;
2271 break;
2272 case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16;
2273 break;
2274 case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO;
2275 break;
2276 case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI;
2277 break;
2278 case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA;
2279 break;
2280 case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC;
2281 break;
2282 case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16;
2283 break;
2284 case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO;
2285 break;
2286 case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI;
2287 break;
2288 case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA;
2289 break;
2290 case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS;
2291 break;
2292 case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS;
2293 break;
2294 case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS;
2295 break;
2296 case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS;
2297 break;
2298 case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS;
2299 break;
2300 case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS;
2301 break;
2302 case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS;
2303 break;
2304 case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS;
2305 break;
2306 case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS;
2307 break;
2308 case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS;
2309 break;
2310 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS;
2311 break;
2312 case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS;
2313 break;
2314 case BFD_RELOC_PPC_TLSGD: r = R_PPC64_TLSGD;
2315 break;
2316 case BFD_RELOC_PPC_TLSLD: r = R_PPC64_TLSLD;
2317 break;
2318 case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64;
2319 break;
2320 case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16;
2321 break;
2322 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO;
2323 break;
2324 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI;
2325 break;
2326 case BFD_RELOC_PPC64_TPREL16_HIGH: r = R_PPC64_TPREL16_HIGH;
2327 break;
2328 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA;
2329 break;
2330 case BFD_RELOC_PPC64_TPREL16_HIGHA: r = R_PPC64_TPREL16_HIGHA;
2331 break;
2332 case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64;
2333 break;
2334 case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16;
2335 break;
2336 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO;
2337 break;
2338 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI;
2339 break;
2340 case BFD_RELOC_PPC64_DTPREL16_HIGH: r = R_PPC64_DTPREL16_HIGH;
2341 break;
2342 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA;
2343 break;
2344 case BFD_RELOC_PPC64_DTPREL16_HIGHA: r = R_PPC64_DTPREL16_HIGHA;
2345 break;
2346 case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64;
2347 break;
2348 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16;
2349 break;
2350 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO;
2351 break;
2352 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI;
2353 break;
2354 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA;
2355 break;
2356 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16;
2357 break;
2358 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO;
2359 break;
2360 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI;
2361 break;
2362 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA;
2363 break;
2364 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS;
2365 break;
2366 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS;
2367 break;
2368 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI;
2369 break;
2370 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA;
2371 break;
2372 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS;
2373 break;
2374 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS;
2375 break;
2376 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI;
2377 break;
2378 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA;
2379 break;
2380 case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS;
2381 break;
2382 case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS;
2383 break;
2384 case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER;
2385 break;
2386 case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA;
2387 break;
2388 case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST;
2389 break;
2390 case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA;
2391 break;
2392 case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS;
2393 break;
2394 case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS;
2395 break;
2396 case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER;
2397 break;
2398 case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA;
2399 break;
2400 case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST;
2401 break;
2402 case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA;
2403 break;
2404 case BFD_RELOC_16_PCREL: r = R_PPC64_REL16;
2405 break;
2406 case BFD_RELOC_LO16_PCREL: r = R_PPC64_REL16_LO;
2407 break;
2408 case BFD_RELOC_HI16_PCREL: r = R_PPC64_REL16_HI;
2409 break;
2410 case BFD_RELOC_HI16_S_PCREL: r = R_PPC64_REL16_HA;
2411 break;
2412 case BFD_RELOC_PPC64_ADDR64_LOCAL: r = R_PPC64_ADDR64_LOCAL;
2413 break;
2414 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT;
2415 break;
2416 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY;
2417 break;
2418 }
2419
2420 return ppc64_elf_howto_table[r];
2421 };
2422
2423 static reloc_howto_type *
2424 ppc64_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2425 const char *r_name)
2426 {
2427 unsigned int i;
2428
2429 for (i = 0;
2430 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
2431 i++)
2432 if (ppc64_elf_howto_raw[i].name != NULL
2433 && strcasecmp (ppc64_elf_howto_raw[i].name, r_name) == 0)
2434 return &ppc64_elf_howto_raw[i];
2435
2436 return NULL;
2437 }
2438
2439 /* Set the howto pointer for a PowerPC ELF reloc. */
2440
2441 static void
2442 ppc64_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
2443 Elf_Internal_Rela *dst)
2444 {
2445 unsigned int type;
2446
2447 /* Initialize howto table if needed. */
2448 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2449 ppc_howto_init ();
2450
2451 type = ELF64_R_TYPE (dst->r_info);
2452 if (type >= (sizeof (ppc64_elf_howto_table)
2453 / sizeof (ppc64_elf_howto_table[0])))
2454 {
2455 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
2456 abfd, (int) type);
2457 type = R_PPC64_NONE;
2458 }
2459 cache_ptr->howto = ppc64_elf_howto_table[type];
2460 }
2461
2462 /* Handle the R_PPC64_ADDR16_HA and similar relocs. */
2463
2464 static bfd_reloc_status_type
2465 ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2466 void *data, asection *input_section,
2467 bfd *output_bfd, char **error_message)
2468 {
2469 /* If this is a relocatable link (output_bfd test tells us), just
2470 call the generic function. Any adjustment will be done at final
2471 link time. */
2472 if (output_bfd != NULL)
2473 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2474 input_section, output_bfd, error_message);
2475
2476 /* Adjust the addend for sign extension of the low 16 bits.
2477 We won't actually be using the low 16 bits, so trashing them
2478 doesn't matter. */
2479 reloc_entry->addend += 0x8000;
2480 return bfd_reloc_continue;
2481 }
2482
2483 static bfd_reloc_status_type
2484 ppc64_elf_branch_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2485 void *data, asection *input_section,
2486 bfd *output_bfd, char **error_message)
2487 {
2488 if (output_bfd != NULL)
2489 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2490 input_section, output_bfd, error_message);
2491
2492 if (strcmp (symbol->section->name, ".opd") == 0
2493 && (symbol->section->owner->flags & DYNAMIC) == 0)
2494 {
2495 bfd_vma dest = opd_entry_value (symbol->section,
2496 symbol->value + reloc_entry->addend,
2497 NULL, NULL, FALSE);
2498 if (dest != (bfd_vma) -1)
2499 reloc_entry->addend = dest - (symbol->value
2500 + symbol->section->output_section->vma
2501 + symbol->section->output_offset);
2502 }
2503 else
2504 {
2505 elf_symbol_type *elfsym = (elf_symbol_type *) symbol;
2506
2507 if (symbol->section->owner != abfd
2508 && abiversion (symbol->section->owner) >= 2)
2509 {
2510 unsigned int i;
2511
2512 for (i = 0; i < symbol->section->owner->symcount; ++i)
2513 {
2514 asymbol *symdef = symbol->section->owner->outsymbols[i];
2515
2516 if (strcmp (symdef->name, symbol->name) == 0)
2517 {
2518 elfsym = (elf_symbol_type *) symdef;
2519 break;
2520 }
2521 }
2522 }
2523 reloc_entry->addend
2524 += PPC64_LOCAL_ENTRY_OFFSET (elfsym->internal_elf_sym.st_other);
2525 }
2526 return bfd_reloc_continue;
2527 }
2528
2529 static bfd_reloc_status_type
2530 ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2531 void *data, asection *input_section,
2532 bfd *output_bfd, char **error_message)
2533 {
2534 long insn;
2535 enum elf_ppc64_reloc_type r_type;
2536 bfd_size_type octets;
2537 /* Assume 'at' branch hints. */
2538 bfd_boolean is_isa_v2 = TRUE;
2539
2540 /* If this is a relocatable link (output_bfd test tells us), just
2541 call the generic function. Any adjustment will be done at final
2542 link time. */
2543 if (output_bfd != NULL)
2544 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2545 input_section, output_bfd, error_message);
2546
2547 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2548 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2549 insn &= ~(0x01 << 21);
2550 r_type = reloc_entry->howto->type;
2551 if (r_type == R_PPC64_ADDR14_BRTAKEN
2552 || r_type == R_PPC64_REL14_BRTAKEN)
2553 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
2554
2555 if (is_isa_v2)
2556 {
2557 /* Set 'a' bit. This is 0b00010 in BO field for branch
2558 on CR(BI) insns (BO == 001at or 011at), and 0b01000
2559 for branch on CTR insns (BO == 1a00t or 1a01t). */
2560 if ((insn & (0x14 << 21)) == (0x04 << 21))
2561 insn |= 0x02 << 21;
2562 else if ((insn & (0x14 << 21)) == (0x10 << 21))
2563 insn |= 0x08 << 21;
2564 else
2565 goto out;
2566 }
2567 else
2568 {
2569 bfd_vma target = 0;
2570 bfd_vma from;
2571
2572 if (!bfd_is_com_section (symbol->section))
2573 target = symbol->value;
2574 target += symbol->section->output_section->vma;
2575 target += symbol->section->output_offset;
2576 target += reloc_entry->addend;
2577
2578 from = (reloc_entry->address
2579 + input_section->output_offset
2580 + input_section->output_section->vma);
2581
2582 /* Invert 'y' bit if not the default. */
2583 if ((bfd_signed_vma) (target - from) < 0)
2584 insn ^= 0x01 << 21;
2585 }
2586 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2587 out:
2588 return ppc64_elf_branch_reloc (abfd, reloc_entry, symbol, data,
2589 input_section, output_bfd, error_message);
2590 }
2591
2592 static bfd_reloc_status_type
2593 ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2594 void *data, asection *input_section,
2595 bfd *output_bfd, char **error_message)
2596 {
2597 /* If this is a relocatable link (output_bfd test tells us), just
2598 call the generic function. Any adjustment will be done at final
2599 link time. */
2600 if (output_bfd != NULL)
2601 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2602 input_section, output_bfd, error_message);
2603
2604 /* Subtract the symbol section base address. */
2605 reloc_entry->addend -= symbol->section->output_section->vma;
2606 return bfd_reloc_continue;
2607 }
2608
2609 static bfd_reloc_status_type
2610 ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2611 void *data, asection *input_section,
2612 bfd *output_bfd, char **error_message)
2613 {
2614 /* If this is a relocatable link (output_bfd test tells us), just
2615 call the generic function. Any adjustment will be done at final
2616 link time. */
2617 if (output_bfd != NULL)
2618 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2619 input_section, output_bfd, error_message);
2620
2621 /* Subtract the symbol section base address. */
2622 reloc_entry->addend -= symbol->section->output_section->vma;
2623
2624 /* Adjust the addend for sign extension of the low 16 bits. */
2625 reloc_entry->addend += 0x8000;
2626 return bfd_reloc_continue;
2627 }
2628
2629 static bfd_reloc_status_type
2630 ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2631 void *data, asection *input_section,
2632 bfd *output_bfd, char **error_message)
2633 {
2634 bfd_vma TOCstart;
2635
2636 /* If this is a relocatable link (output_bfd test tells us), just
2637 call the generic function. Any adjustment will be done at final
2638 link time. */
2639 if (output_bfd != NULL)
2640 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2641 input_section, output_bfd, error_message);
2642
2643 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2644 if (TOCstart == 0)
2645 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2646
2647 /* Subtract the TOC base address. */
2648 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2649 return bfd_reloc_continue;
2650 }
2651
2652 static bfd_reloc_status_type
2653 ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2654 void *data, asection *input_section,
2655 bfd *output_bfd, char **error_message)
2656 {
2657 bfd_vma TOCstart;
2658
2659 /* If this is a relocatable link (output_bfd test tells us), just
2660 call the generic function. Any adjustment will be done at final
2661 link time. */
2662 if (output_bfd != NULL)
2663 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2664 input_section, output_bfd, error_message);
2665
2666 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2667 if (TOCstart == 0)
2668 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2669
2670 /* Subtract the TOC base address. */
2671 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2672
2673 /* Adjust the addend for sign extension of the low 16 bits. */
2674 reloc_entry->addend += 0x8000;
2675 return bfd_reloc_continue;
2676 }
2677
2678 static bfd_reloc_status_type
2679 ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2680 void *data, asection *input_section,
2681 bfd *output_bfd, char **error_message)
2682 {
2683 bfd_vma TOCstart;
2684 bfd_size_type octets;
2685
2686 /* If this is a relocatable link (output_bfd test tells us), just
2687 call the generic function. Any adjustment will be done at final
2688 link time. */
2689 if (output_bfd != NULL)
2690 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2691 input_section, output_bfd, error_message);
2692
2693 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2694 if (TOCstart == 0)
2695 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2696
2697 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2698 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
2699 return bfd_reloc_ok;
2700 }
2701
2702 static bfd_reloc_status_type
2703 ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2704 void *data, asection *input_section,
2705 bfd *output_bfd, char **error_message)
2706 {
2707 /* If this is a relocatable link (output_bfd test tells us), just
2708 call the generic function. Any adjustment will be done at final
2709 link time. */
2710 if (output_bfd != NULL)
2711 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2712 input_section, output_bfd, error_message);
2713
2714 if (error_message != NULL)
2715 {
2716 static char buf[60];
2717 sprintf (buf, "generic linker can't handle %s",
2718 reloc_entry->howto->name);
2719 *error_message = buf;
2720 }
2721 return bfd_reloc_dangerous;
2722 }
2723
2724 /* Track GOT entries needed for a given symbol. We might need more
2725 than one got entry per symbol. */
2726 struct got_entry
2727 {
2728 struct got_entry *next;
2729
2730 /* The symbol addend that we'll be placing in the GOT. */
2731 bfd_vma addend;
2732
2733 /* Unlike other ELF targets, we use separate GOT entries for the same
2734 symbol referenced from different input files. This is to support
2735 automatic multiple TOC/GOT sections, where the TOC base can vary
2736 from one input file to another. After partitioning into TOC groups
2737 we merge entries within the group.
2738
2739 Point to the BFD owning this GOT entry. */
2740 bfd *owner;
2741
2742 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
2743 TLS_TPREL or TLS_DTPREL for tls entries. */
2744 unsigned char tls_type;
2745
2746 /* Non-zero if got.ent points to real entry. */
2747 unsigned char is_indirect;
2748
2749 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
2750 union
2751 {
2752 bfd_signed_vma refcount;
2753 bfd_vma offset;
2754 struct got_entry *ent;
2755 } got;
2756 };
2757
2758 /* The same for PLT. */
2759 struct plt_entry
2760 {
2761 struct plt_entry *next;
2762
2763 bfd_vma addend;
2764
2765 union
2766 {
2767 bfd_signed_vma refcount;
2768 bfd_vma offset;
2769 } plt;
2770 };
2771
2772 struct ppc64_elf_obj_tdata
2773 {
2774 struct elf_obj_tdata elf;
2775
2776 /* Shortcuts to dynamic linker sections. */
2777 asection *got;
2778 asection *relgot;
2779
2780 /* Used during garbage collection. We attach global symbols defined
2781 on removed .opd entries to this section so that the sym is removed. */
2782 asection *deleted_section;
2783
2784 /* TLS local dynamic got entry handling. Support for multiple GOT
2785 sections means we potentially need one of these for each input bfd. */
2786 struct got_entry tlsld_got;
2787
2788 union {
2789 /* A copy of relocs before they are modified for --emit-relocs. */
2790 Elf_Internal_Rela *relocs;
2791
2792 /* Section contents. */
2793 bfd_byte *contents;
2794 } opd;
2795
2796 /* Nonzero if this bfd has small toc/got relocs, ie. that expect
2797 the reloc to be in the range -32768 to 32767. */
2798 unsigned int has_small_toc_reloc : 1;
2799
2800 /* Set if toc/got ha relocs detected not using r2, or lo reloc
2801 instruction not one we handle. */
2802 unsigned int unexpected_toc_insn : 1;
2803 };
2804
2805 #define ppc64_elf_tdata(bfd) \
2806 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
2807
2808 #define ppc64_tlsld_got(bfd) \
2809 (&ppc64_elf_tdata (bfd)->tlsld_got)
2810
2811 #define is_ppc64_elf(bfd) \
2812 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2813 && elf_object_id (bfd) == PPC64_ELF_DATA)
2814
2815 /* Override the generic function because we store some extras. */
2816
2817 static bfd_boolean
2818 ppc64_elf_mkobject (bfd *abfd)
2819 {
2820 return bfd_elf_allocate_object (abfd, sizeof (struct ppc64_elf_obj_tdata),
2821 PPC64_ELF_DATA);
2822 }
2823
2824 /* Fix bad default arch selected for a 64 bit input bfd when the
2825 default is 32 bit. */
2826
2827 static bfd_boolean
2828 ppc64_elf_object_p (bfd *abfd)
2829 {
2830 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 32)
2831 {
2832 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2833
2834 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2835 {
2836 /* Relies on arch after 32 bit default being 64 bit default. */
2837 abfd->arch_info = abfd->arch_info->next;
2838 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2839 }
2840 }
2841 return TRUE;
2842 }
2843
2844 /* Support for core dump NOTE sections. */
2845
2846 static bfd_boolean
2847 ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2848 {
2849 size_t offset, size;
2850
2851 if (note->descsz != 504)
2852 return FALSE;
2853
2854 /* pr_cursig */
2855 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
2856
2857 /* pr_pid */
2858 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 32);
2859
2860 /* pr_reg */
2861 offset = 112;
2862 size = 384;
2863
2864 /* Make a ".reg/999" section. */
2865 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2866 size, note->descpos + offset);
2867 }
2868
2869 static bfd_boolean
2870 ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2871 {
2872 if (note->descsz != 136)
2873 return FALSE;
2874
2875 elf_tdata (abfd)->core->pid
2876 = bfd_get_32 (abfd, note->descdata + 24);
2877 elf_tdata (abfd)->core->program
2878 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
2879 elf_tdata (abfd)->core->command
2880 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
2881
2882 return TRUE;
2883 }
2884
2885 static char *
2886 ppc64_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type,
2887 ...)
2888 {
2889 switch (note_type)
2890 {
2891 default:
2892 return NULL;
2893
2894 case NT_PRPSINFO:
2895 {
2896 char data[136];
2897 va_list ap;
2898
2899 va_start (ap, note_type);
2900 memset (data, 0, sizeof (data));
2901 strncpy (data + 40, va_arg (ap, const char *), 16);
2902 strncpy (data + 56, va_arg (ap, const char *), 80);
2903 va_end (ap);
2904 return elfcore_write_note (abfd, buf, bufsiz,
2905 "CORE", note_type, data, sizeof (data));
2906 }
2907
2908 case NT_PRSTATUS:
2909 {
2910 char data[504];
2911 va_list ap;
2912 long pid;
2913 int cursig;
2914 const void *greg;
2915
2916 va_start (ap, note_type);
2917 memset (data, 0, 112);
2918 pid = va_arg (ap, long);
2919 bfd_put_32 (abfd, pid, data + 32);
2920 cursig = va_arg (ap, int);
2921 bfd_put_16 (abfd, cursig, data + 12);
2922 greg = va_arg (ap, const void *);
2923 memcpy (data + 112, greg, 384);
2924 memset (data + 496, 0, 8);
2925 va_end (ap);
2926 return elfcore_write_note (abfd, buf, bufsiz,
2927 "CORE", note_type, data, sizeof (data));
2928 }
2929 }
2930 }
2931
2932 /* Add extra PPC sections. */
2933
2934 static const struct bfd_elf_special_section ppc64_elf_special_sections[]=
2935 {
2936 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, 0 },
2937 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2938 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2939 { STRING_COMMA_LEN (".toc"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2940 { STRING_COMMA_LEN (".toc1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2941 { STRING_COMMA_LEN (".tocbss"), 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2942 { NULL, 0, 0, 0, 0 }
2943 };
2944
2945 enum _ppc64_sec_type {
2946 sec_normal = 0,
2947 sec_opd = 1,
2948 sec_toc = 2
2949 };
2950
2951 struct _ppc64_elf_section_data
2952 {
2953 struct bfd_elf_section_data elf;
2954
2955 union
2956 {
2957 /* An array with one entry for each opd function descriptor. */
2958 struct _opd_sec_data
2959 {
2960 /* Points to the function code section for local opd entries. */
2961 asection **func_sec;
2962
2963 /* After editing .opd, adjust references to opd local syms. */
2964 long *adjust;
2965 } opd;
2966
2967 /* An array for toc sections, indexed by offset/8. */
2968 struct _toc_sec_data
2969 {
2970 /* Specifies the relocation symbol index used at a given toc offset. */
2971 unsigned *symndx;
2972
2973 /* And the relocation addend. */
2974 bfd_vma *add;
2975 } toc;
2976 } u;
2977
2978 enum _ppc64_sec_type sec_type:2;
2979
2980 /* Flag set when small branches are detected. Used to
2981 select suitable defaults for the stub group size. */
2982 unsigned int has_14bit_branch:1;
2983 };
2984
2985 #define ppc64_elf_section_data(sec) \
2986 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
2987
2988 static bfd_boolean
2989 ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
2990 {
2991 if (!sec->used_by_bfd)
2992 {
2993 struct _ppc64_elf_section_data *sdata;
2994 bfd_size_type amt = sizeof (*sdata);
2995
2996 sdata = bfd_zalloc (abfd, amt);
2997 if (sdata == NULL)
2998 return FALSE;
2999 sec->used_by_bfd = sdata;
3000 }
3001
3002 return _bfd_elf_new_section_hook (abfd, sec);
3003 }
3004
3005 static struct _opd_sec_data *
3006 get_opd_info (asection * sec)
3007 {
3008 if (sec != NULL
3009 && ppc64_elf_section_data (sec) != NULL
3010 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
3011 return &ppc64_elf_section_data (sec)->u.opd;
3012 return NULL;
3013 }
3014 \f
3015 /* Parameters for the qsort hook. */
3016 static bfd_boolean synthetic_relocatable;
3017
3018 /* qsort comparison function for ppc64_elf_get_synthetic_symtab. */
3019
3020 static int
3021 compare_symbols (const void *ap, const void *bp)
3022 {
3023 const asymbol *a = * (const asymbol **) ap;
3024 const asymbol *b = * (const asymbol **) bp;
3025
3026 /* Section symbols first. */
3027 if ((a->flags & BSF_SECTION_SYM) && !(b->flags & BSF_SECTION_SYM))
3028 return -1;
3029 if (!(a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM))
3030 return 1;
3031
3032 /* then .opd symbols. */
3033 if (strcmp (a->section->name, ".opd") == 0
3034 && strcmp (b->section->name, ".opd") != 0)
3035 return -1;
3036 if (strcmp (a->section->name, ".opd") != 0
3037 && strcmp (b->section->name, ".opd") == 0)
3038 return 1;
3039
3040 /* then other code symbols. */
3041 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3042 == (SEC_CODE | SEC_ALLOC)
3043 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3044 != (SEC_CODE | SEC_ALLOC))
3045 return -1;
3046
3047 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3048 != (SEC_CODE | SEC_ALLOC)
3049 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3050 == (SEC_CODE | SEC_ALLOC))
3051 return 1;
3052
3053 if (synthetic_relocatable)
3054 {
3055 if (a->section->id < b->section->id)
3056 return -1;
3057
3058 if (a->section->id > b->section->id)
3059 return 1;
3060 }
3061
3062 if (a->value + a->section->vma < b->value + b->section->vma)
3063 return -1;
3064
3065 if (a->value + a->section->vma > b->value + b->section->vma)
3066 return 1;
3067
3068 /* For syms with the same value, prefer strong dynamic global function
3069 syms over other syms. */
3070 if ((a->flags & BSF_GLOBAL) != 0 && (b->flags & BSF_GLOBAL) == 0)
3071 return -1;
3072
3073 if ((a->flags & BSF_GLOBAL) == 0 && (b->flags & BSF_GLOBAL) != 0)
3074 return 1;
3075
3076 if ((a->flags & BSF_FUNCTION) != 0 && (b->flags & BSF_FUNCTION) == 0)
3077 return -1;
3078
3079 if ((a->flags & BSF_FUNCTION) == 0 && (b->flags & BSF_FUNCTION) != 0)
3080 return 1;
3081
3082 if ((a->flags & BSF_WEAK) == 0 && (b->flags & BSF_WEAK) != 0)
3083 return -1;
3084
3085 if ((a->flags & BSF_WEAK) != 0 && (b->flags & BSF_WEAK) == 0)
3086 return 1;
3087
3088 if ((a->flags & BSF_DYNAMIC) != 0 && (b->flags & BSF_DYNAMIC) == 0)
3089 return -1;
3090
3091 if ((a->flags & BSF_DYNAMIC) == 0 && (b->flags & BSF_DYNAMIC) != 0)
3092 return 1;
3093
3094 return 0;
3095 }
3096
3097 /* Search SYMS for a symbol of the given VALUE. */
3098
3099 static asymbol *
3100 sym_exists_at (asymbol **syms, long lo, long hi, int id, bfd_vma value)
3101 {
3102 long mid;
3103
3104 if (id == -1)
3105 {
3106 while (lo < hi)
3107 {
3108 mid = (lo + hi) >> 1;
3109 if (syms[mid]->value + syms[mid]->section->vma < value)
3110 lo = mid + 1;
3111 else if (syms[mid]->value + syms[mid]->section->vma > value)
3112 hi = mid;
3113 else
3114 return syms[mid];
3115 }
3116 }
3117 else
3118 {
3119 while (lo < hi)
3120 {
3121 mid = (lo + hi) >> 1;
3122 if (syms[mid]->section->id < id)
3123 lo = mid + 1;
3124 else if (syms[mid]->section->id > id)
3125 hi = mid;
3126 else if (syms[mid]->value < value)
3127 lo = mid + 1;
3128 else if (syms[mid]->value > value)
3129 hi = mid;
3130 else
3131 return syms[mid];
3132 }
3133 }
3134 return NULL;
3135 }
3136
3137 static bfd_boolean
3138 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
3139 {
3140 bfd_vma vma = *(bfd_vma *) ptr;
3141 return ((section->flags & SEC_ALLOC) != 0
3142 && section->vma <= vma
3143 && vma < section->vma + section->size);
3144 }
3145
3146 /* Create synthetic symbols, effectively restoring "dot-symbol" function
3147 entry syms. Also generate @plt symbols for the glink branch table. */
3148
3149 static long
3150 ppc64_elf_get_synthetic_symtab (bfd *abfd,
3151 long static_count, asymbol **static_syms,
3152 long dyn_count, asymbol **dyn_syms,
3153 asymbol **ret)
3154 {
3155 asymbol *s;
3156 long i;
3157 long count;
3158 char *names;
3159 long symcount, codesecsym, codesecsymend, secsymend, opdsymend;
3160 asection *opd = NULL;
3161 bfd_boolean relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0;
3162 asymbol **syms;
3163 int abi = abiversion (abfd);
3164
3165 *ret = NULL;
3166
3167 if (abi < 2)
3168 {
3169 opd = bfd_get_section_by_name (abfd, ".opd");
3170 if (opd == NULL && abi == 1)
3171 return 0;
3172 }
3173
3174 symcount = static_count;
3175 if (!relocatable)
3176 symcount += dyn_count;
3177 if (symcount == 0)
3178 return 0;
3179
3180 syms = bfd_malloc ((symcount + 1) * sizeof (*syms));
3181 if (syms == NULL)
3182 return -1;
3183
3184 if (!relocatable && static_count != 0 && dyn_count != 0)
3185 {
3186 /* Use both symbol tables. */
3187 memcpy (syms, static_syms, static_count * sizeof (*syms));
3188 memcpy (syms + static_count, dyn_syms, (dyn_count + 1) * sizeof (*syms));
3189 }
3190 else if (!relocatable && static_count == 0)
3191 memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms));
3192 else
3193 memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms));
3194
3195 synthetic_relocatable = relocatable;
3196 qsort (syms, symcount, sizeof (*syms), compare_symbols);
3197
3198 if (!relocatable && symcount > 1)
3199 {
3200 long j;
3201 /* Trim duplicate syms, since we may have merged the normal and
3202 dynamic symbols. Actually, we only care about syms that have
3203 different values, so trim any with the same value. */
3204 for (i = 1, j = 1; i < symcount; ++i)
3205 if (syms[i - 1]->value + syms[i - 1]->section->vma
3206 != syms[i]->value + syms[i]->section->vma)
3207 syms[j++] = syms[i];
3208 symcount = j;
3209 }
3210
3211 i = 0;
3212 if (strcmp (syms[i]->section->name, ".opd") == 0)
3213 ++i;
3214 codesecsym = i;
3215
3216 for (; i < symcount; ++i)
3217 if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3218 != (SEC_CODE | SEC_ALLOC))
3219 || (syms[i]->flags & BSF_SECTION_SYM) == 0)
3220 break;
3221 codesecsymend = i;
3222
3223 for (; i < symcount; ++i)
3224 if ((syms[i]->flags & BSF_SECTION_SYM) == 0)
3225 break;
3226 secsymend = i;
3227
3228 for (; i < symcount; ++i)
3229 if (strcmp (syms[i]->section->name, ".opd") != 0)
3230 break;
3231 opdsymend = i;
3232
3233 for (; i < symcount; ++i)
3234 if ((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3235 != (SEC_CODE | SEC_ALLOC))
3236 break;
3237 symcount = i;
3238
3239 count = 0;
3240
3241 if (relocatable)
3242 {
3243 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3244 arelent *r;
3245 size_t size;
3246 long relcount;
3247
3248 if (opdsymend == secsymend)
3249 goto done;
3250
3251 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3252 relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0;
3253 if (relcount == 0)
3254 goto done;
3255
3256 if (!(*slurp_relocs) (abfd, opd, static_syms, FALSE))
3257 {
3258 count = -1;
3259 goto done;
3260 }
3261
3262 size = 0;
3263 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3264 {
3265 asymbol *sym;
3266
3267 while (r < opd->relocation + relcount
3268 && r->address < syms[i]->value + opd->vma)
3269 ++r;
3270
3271 if (r == opd->relocation + relcount)
3272 break;
3273
3274 if (r->address != syms[i]->value + opd->vma)
3275 continue;
3276
3277 if (r->howto->type != R_PPC64_ADDR64)
3278 continue;
3279
3280 sym = *r->sym_ptr_ptr;
3281 if (!sym_exists_at (syms, opdsymend, symcount,
3282 sym->section->id, sym->value + r->addend))
3283 {
3284 ++count;
3285 size += sizeof (asymbol);
3286 size += strlen (syms[i]->name) + 2;
3287 }
3288 }
3289
3290 s = *ret = bfd_malloc (size);
3291 if (s == NULL)
3292 {
3293 count = -1;
3294 goto done;
3295 }
3296
3297 names = (char *) (s + count);
3298
3299 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3300 {
3301 asymbol *sym;
3302
3303 while (r < opd->relocation + relcount
3304 && r->address < syms[i]->value + opd->vma)
3305 ++r;
3306
3307 if (r == opd->relocation + relcount)
3308 break;
3309
3310 if (r->address != syms[i]->value + opd->vma)
3311 continue;
3312
3313 if (r->howto->type != R_PPC64_ADDR64)
3314 continue;
3315
3316 sym = *r->sym_ptr_ptr;
3317 if (!sym_exists_at (syms, opdsymend, symcount,
3318 sym->section->id, sym->value + r->addend))
3319 {
3320 size_t len;
3321
3322 *s = *syms[i];
3323 s->flags |= BSF_SYNTHETIC;
3324 s->section = sym->section;
3325 s->value = sym->value + r->addend;
3326 s->name = names;
3327 *names++ = '.';
3328 len = strlen (syms[i]->name);
3329 memcpy (names, syms[i]->name, len + 1);
3330 names += len + 1;
3331 /* Have udata.p point back to the original symbol this
3332 synthetic symbol was derived from. */
3333 s->udata.p = syms[i];
3334 s++;
3335 }
3336 }
3337 }
3338 else
3339 {
3340 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3341 bfd_byte *contents = NULL;
3342 size_t size;
3343 long plt_count = 0;
3344 bfd_vma glink_vma = 0, resolv_vma = 0;
3345 asection *dynamic, *glink = NULL, *relplt = NULL;
3346 arelent *p;
3347
3348 if (opd != NULL && !bfd_malloc_and_get_section (abfd, opd, &contents))
3349 {
3350 free_contents_and_exit:
3351 if (contents)
3352 free (contents);
3353 count = -1;
3354 goto done;
3355 }
3356
3357 size = 0;
3358 for (i = secsymend; i < opdsymend; ++i)
3359 {
3360 bfd_vma ent;
3361
3362 /* Ignore bogus symbols. */
3363 if (syms[i]->value > opd->size - 8)
3364 continue;
3365
3366 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3367 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3368 {
3369 ++count;
3370 size += sizeof (asymbol);
3371 size += strlen (syms[i]->name) + 2;
3372 }
3373 }
3374
3375 /* Get start of .glink stubs from DT_PPC64_GLINK. */
3376 if (dyn_count != 0
3377 && (dynamic = bfd_get_section_by_name (abfd, ".dynamic")) != NULL)
3378 {
3379 bfd_byte *dynbuf, *extdyn, *extdynend;
3380 size_t extdynsize;
3381 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
3382
3383 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
3384 goto free_contents_and_exit;
3385
3386 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
3387 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
3388
3389 extdyn = dynbuf;
3390 extdynend = extdyn + dynamic->size;
3391 for (; extdyn < extdynend; extdyn += extdynsize)
3392 {
3393 Elf_Internal_Dyn dyn;
3394 (*swap_dyn_in) (abfd, extdyn, &dyn);
3395
3396 if (dyn.d_tag == DT_NULL)
3397 break;
3398
3399 if (dyn.d_tag == DT_PPC64_GLINK)
3400 {
3401 /* The first glink stub starts at offset 32; see
3402 comment in ppc64_elf_finish_dynamic_sections. */
3403 glink_vma = dyn.d_un.d_val + GLINK_CALL_STUB_SIZE - 8 * 4;
3404 /* The .glink section usually does not survive the final
3405 link; search for the section (usually .text) where the
3406 glink stubs now reside. */
3407 glink = bfd_sections_find_if (abfd, section_covers_vma,
3408 &glink_vma);
3409 break;
3410 }
3411 }
3412
3413 free (dynbuf);
3414 }
3415
3416 if (glink != NULL)
3417 {
3418 /* Determine __glink trampoline by reading the relative branch
3419 from the first glink stub. */
3420 bfd_byte buf[4];
3421 unsigned int off = 0;
3422
3423 while (bfd_get_section_contents (abfd, glink, buf,
3424 glink_vma + off - glink->vma, 4))
3425 {
3426 unsigned int insn = bfd_get_32 (abfd, buf);
3427 insn ^= B_DOT;
3428 if ((insn & ~0x3fffffc) == 0)
3429 {
3430 resolv_vma = glink_vma + off + (insn ^ 0x2000000) - 0x2000000;
3431 break;
3432 }
3433 off += 4;
3434 if (off > 4)
3435 break;
3436 }
3437
3438 if (resolv_vma)
3439 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
3440
3441 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
3442 if (relplt != NULL)
3443 {
3444 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3445 if (! (*slurp_relocs) (abfd, relplt, dyn_syms, TRUE))
3446 goto free_contents_and_exit;
3447
3448 plt_count = relplt->size / sizeof (Elf64_External_Rela);
3449 size += plt_count * sizeof (asymbol);
3450
3451 p = relplt->relocation;
3452 for (i = 0; i < plt_count; i++, p++)
3453 {
3454 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
3455 if (p->addend != 0)
3456 size += sizeof ("+0x") - 1 + 16;
3457 }
3458 }
3459 }
3460
3461 s = *ret = bfd_malloc (size);
3462 if (s == NULL)
3463 goto free_contents_and_exit;
3464
3465 names = (char *) (s + count + plt_count + (resolv_vma != 0));
3466
3467 for (i = secsymend; i < opdsymend; ++i)
3468 {
3469 bfd_vma ent;
3470
3471 if (syms[i]->value > opd->size - 8)
3472 continue;
3473
3474 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3475 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3476 {
3477 long lo, hi;
3478 size_t len;
3479 asection *sec = abfd->sections;
3480
3481 *s = *syms[i];
3482 lo = codesecsym;
3483 hi = codesecsymend;
3484 while (lo < hi)
3485 {
3486 long mid = (lo + hi) >> 1;
3487 if (syms[mid]->section->vma < ent)
3488 lo = mid + 1;
3489 else if (syms[mid]->section->vma > ent)
3490 hi = mid;
3491 else
3492 {
3493 sec = syms[mid]->section;
3494 break;
3495 }
3496 }
3497
3498 if (lo >= hi && lo > codesecsym)
3499 sec = syms[lo - 1]->section;
3500
3501 for (; sec != NULL; sec = sec->next)
3502 {
3503 if (sec->vma > ent)
3504 break;
3505 /* SEC_LOAD may not be set if SEC is from a separate debug
3506 info file. */
3507 if ((sec->flags & SEC_ALLOC) == 0)
3508 break;
3509 if ((sec->flags & SEC_CODE) != 0)
3510 s->section = sec;
3511 }
3512 s->flags |= BSF_SYNTHETIC;
3513 s->value = ent - s->section->vma;
3514 s->name = names;
3515 *names++ = '.';
3516 len = strlen (syms[i]->name);
3517 memcpy (names, syms[i]->name, len + 1);
3518 names += len + 1;
3519 /* Have udata.p point back to the original symbol this
3520 synthetic symbol was derived from. */
3521 s->udata.p = syms[i];
3522 s++;
3523 }
3524 }
3525 free (contents);
3526
3527 if (glink != NULL && relplt != NULL)
3528 {
3529 if (resolv_vma)
3530 {
3531 /* Add a symbol for the main glink trampoline. */
3532 memset (s, 0, sizeof *s);
3533 s->the_bfd = abfd;
3534 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3535 s->section = glink;
3536 s->value = resolv_vma - glink->vma;
3537 s->name = names;
3538 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3539 names += sizeof ("__glink_PLTresolve");
3540 s++;
3541 count++;
3542 }
3543
3544 /* FIXME: It would be very much nicer to put sym@plt on the
3545 stub rather than on the glink branch table entry. The
3546 objdump disassembler would then use a sensible symbol
3547 name on plt calls. The difficulty in doing so is
3548 a) finding the stubs, and,
3549 b) matching stubs against plt entries, and,
3550 c) there can be multiple stubs for a given plt entry.
3551
3552 Solving (a) could be done by code scanning, but older
3553 ppc64 binaries used different stubs to current code.
3554 (b) is the tricky one since you need to known the toc
3555 pointer for at least one function that uses a pic stub to
3556 be able to calculate the plt address referenced.
3557 (c) means gdb would need to set multiple breakpoints (or
3558 find the glink branch itself) when setting breakpoints
3559 for pending shared library loads. */
3560 p = relplt->relocation;
3561 for (i = 0; i < plt_count; i++, p++)
3562 {
3563 size_t len;
3564
3565 *s = **p->sym_ptr_ptr;
3566 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
3567 we are defining a symbol, ensure one of them is set. */
3568 if ((s->flags & BSF_LOCAL) == 0)
3569 s->flags |= BSF_GLOBAL;
3570 s->flags |= BSF_SYNTHETIC;
3571 s->section = glink;
3572 s->value = glink_vma - glink->vma;
3573 s->name = names;
3574 s->udata.p = NULL;
3575 len = strlen ((*p->sym_ptr_ptr)->name);
3576 memcpy (names, (*p->sym_ptr_ptr)->name, len);
3577 names += len;
3578 if (p->addend != 0)
3579 {
3580 memcpy (names, "+0x", sizeof ("+0x") - 1);
3581 names += sizeof ("+0x") - 1;
3582 bfd_sprintf_vma (abfd, names, p->addend);
3583 names += strlen (names);
3584 }
3585 memcpy (names, "@plt", sizeof ("@plt"));
3586 names += sizeof ("@plt");
3587 s++;
3588 if (abi < 2)
3589 {
3590 glink_vma += 8;
3591 if (i >= 0x8000)
3592 glink_vma += 4;
3593 }
3594 else
3595 glink_vma += 4;
3596 }
3597 count += plt_count;
3598 }
3599 }
3600
3601 done:
3602 free (syms);
3603 return count;
3604 }
3605 \f
3606 /* The following functions are specific to the ELF linker, while
3607 functions above are used generally. Those named ppc64_elf_* are
3608 called by the main ELF linker code. They appear in this file more
3609 or less in the order in which they are called. eg.
3610 ppc64_elf_check_relocs is called early in the link process,
3611 ppc64_elf_finish_dynamic_sections is one of the last functions
3612 called.
3613
3614 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
3615 functions have both a function code symbol and a function descriptor
3616 symbol. A call to foo in a relocatable object file looks like:
3617
3618 . .text
3619 . x:
3620 . bl .foo
3621 . nop
3622
3623 The function definition in another object file might be:
3624
3625 . .section .opd
3626 . foo: .quad .foo
3627 . .quad .TOC.@tocbase
3628 . .quad 0
3629 .
3630 . .text
3631 . .foo: blr
3632
3633 When the linker resolves the call during a static link, the branch
3634 unsurprisingly just goes to .foo and the .opd information is unused.
3635 If the function definition is in a shared library, things are a little
3636 different: The call goes via a plt call stub, the opd information gets
3637 copied to the plt, and the linker patches the nop.
3638
3639 . x:
3640 . bl .foo_stub
3641 . ld 2,40(1)
3642 .
3643 .
3644 . .foo_stub:
3645 . std 2,40(1) # in practice, the call stub
3646 . addis 11,2,Lfoo@toc@ha # is slightly optimized, but
3647 . addi 11,11,Lfoo@toc@l # this is the general idea
3648 . ld 12,0(11)
3649 . ld 2,8(11)
3650 . mtctr 12
3651 . ld 11,16(11)
3652 . bctr
3653 .
3654 . .section .plt
3655 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
3656
3657 The "reloc ()" notation is supposed to indicate that the linker emits
3658 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
3659 copying.
3660
3661 What are the difficulties here? Well, firstly, the relocations
3662 examined by the linker in check_relocs are against the function code
3663 sym .foo, while the dynamic relocation in the plt is emitted against
3664 the function descriptor symbol, foo. Somewhere along the line, we need
3665 to carefully copy dynamic link information from one symbol to the other.
3666 Secondly, the generic part of the elf linker will make .foo a dynamic
3667 symbol as is normal for most other backends. We need foo dynamic
3668 instead, at least for an application final link. However, when
3669 creating a shared library containing foo, we need to have both symbols
3670 dynamic so that references to .foo are satisfied during the early
3671 stages of linking. Otherwise the linker might decide to pull in a
3672 definition from some other object, eg. a static library.
3673
3674 Update: As of August 2004, we support a new convention. Function
3675 calls may use the function descriptor symbol, ie. "bl foo". This
3676 behaves exactly as "bl .foo". */
3677
3678 /* Of those relocs that might be copied as dynamic relocs, this function
3679 selects those that must be copied when linking a shared library,
3680 even when the symbol is local. */
3681
3682 static int
3683 must_be_dyn_reloc (struct bfd_link_info *info,
3684 enum elf_ppc64_reloc_type r_type)
3685 {
3686 switch (r_type)
3687 {
3688 default:
3689 return 1;
3690
3691 case R_PPC64_REL32:
3692 case R_PPC64_REL64:
3693 case R_PPC64_REL30:
3694 return 0;
3695
3696 case R_PPC64_TPREL16:
3697 case R_PPC64_TPREL16_LO:
3698 case R_PPC64_TPREL16_HI:
3699 case R_PPC64_TPREL16_HA:
3700 case R_PPC64_TPREL16_DS:
3701 case R_PPC64_TPREL16_LO_DS:
3702 case R_PPC64_TPREL16_HIGH:
3703 case R_PPC64_TPREL16_HIGHA:
3704 case R_PPC64_TPREL16_HIGHER:
3705 case R_PPC64_TPREL16_HIGHERA:
3706 case R_PPC64_TPREL16_HIGHEST:
3707 case R_PPC64_TPREL16_HIGHESTA:
3708 case R_PPC64_TPREL64:
3709 return !info->executable;
3710 }
3711 }
3712
3713 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3714 copying dynamic variables from a shared lib into an app's dynbss
3715 section, and instead use a dynamic relocation to point into the
3716 shared lib. With code that gcc generates, it's vital that this be
3717 enabled; In the PowerPC64 ABI, the address of a function is actually
3718 the address of a function descriptor, which resides in the .opd
3719 section. gcc uses the descriptor directly rather than going via the
3720 GOT as some other ABI's do, which means that initialized function
3721 pointers must reference the descriptor. Thus, a function pointer
3722 initialized to the address of a function in a shared library will
3723 either require a copy reloc, or a dynamic reloc. Using a copy reloc
3724 redefines the function descriptor symbol to point to the copy. This
3725 presents a problem as a plt entry for that function is also
3726 initialized from the function descriptor symbol and the copy reloc
3727 may not be initialized first. */
3728 #define ELIMINATE_COPY_RELOCS 1
3729
3730 /* Section name for stubs is the associated section name plus this
3731 string. */
3732 #define STUB_SUFFIX ".stub"
3733
3734 /* Linker stubs.
3735 ppc_stub_long_branch:
3736 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
3737 destination, but a 24 bit branch in a stub section will reach.
3738 . b dest
3739
3740 ppc_stub_plt_branch:
3741 Similar to the above, but a 24 bit branch in the stub section won't
3742 reach its destination.
3743 . addis %r11,%r2,xxx@toc@ha
3744 . ld %r12,xxx@toc@l(%r11)
3745 . mtctr %r12
3746 . bctr
3747
3748 ppc_stub_plt_call:
3749 Used to call a function in a shared library. If it so happens that
3750 the plt entry referenced crosses a 64k boundary, then an extra
3751 "addi %r11,%r11,xxx@toc@l" will be inserted before the "mtctr".
3752 . std %r2,40(%r1)
3753 . addis %r11,%r2,xxx@toc@ha
3754 . ld %r12,xxx+0@toc@l(%r11)
3755 . mtctr %r12
3756 . ld %r2,xxx+8@toc@l(%r11)
3757 . ld %r11,xxx+16@toc@l(%r11)
3758 . bctr
3759
3760 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
3761 code to adjust the value and save r2 to support multiple toc sections.
3762 A ppc_stub_long_branch with an r2 offset looks like:
3763 . std %r2,40(%r1)
3764 . addis %r2,%r2,off@ha
3765 . addi %r2,%r2,off@l
3766 . b dest
3767
3768 A ppc_stub_plt_branch with an r2 offset looks like:
3769 . std %r2,40(%r1)
3770 . addis %r11,%r2,xxx@toc@ha
3771 . ld %r12,xxx@toc@l(%r11)
3772 . addis %r2,%r2,off@ha
3773 . addi %r2,%r2,off@l
3774 . mtctr %r12
3775 . bctr
3776
3777 In cases where the "addis" instruction would add zero, the "addis" is
3778 omitted and following instructions modified slightly in some cases.
3779 */
3780
3781 enum ppc_stub_type {
3782 ppc_stub_none,
3783 ppc_stub_long_branch,
3784 ppc_stub_long_branch_r2off,
3785 ppc_stub_plt_branch,
3786 ppc_stub_plt_branch_r2off,
3787 ppc_stub_plt_call,
3788 ppc_stub_plt_call_r2save,
3789 ppc_stub_global_entry
3790 };
3791
3792 struct ppc_stub_hash_entry {
3793
3794 /* Base hash table entry structure. */
3795 struct bfd_hash_entry root;
3796
3797 enum ppc_stub_type stub_type;
3798
3799 /* The stub section. */
3800 asection *stub_sec;
3801
3802 /* Offset within stub_sec of the beginning of this stub. */
3803 bfd_vma stub_offset;
3804
3805 /* Given the symbol's value and its section we can determine its final
3806 value when building the stubs (so the stub knows where to jump. */
3807 bfd_vma target_value;
3808 asection *target_section;
3809
3810 /* The symbol table entry, if any, that this was derived from. */
3811 struct ppc_link_hash_entry *h;
3812 struct plt_entry *plt_ent;
3813
3814 /* Where this stub is being called from, or, in the case of combined
3815 stub sections, the first input section in the group. */
3816 asection *id_sec;
3817
3818 /* Symbol st_other. */
3819 unsigned char other;
3820 };
3821
3822 struct ppc_branch_hash_entry {
3823
3824 /* Base hash table entry structure. */
3825 struct bfd_hash_entry root;
3826
3827 /* Offset within branch lookup table. */
3828 unsigned int offset;
3829
3830 /* Generation marker. */
3831 unsigned int iter;
3832 };
3833
3834 /* Used to track dynamic relocations for local symbols. */
3835 struct ppc_dyn_relocs
3836 {
3837 struct ppc_dyn_relocs *next;
3838
3839 /* The input section of the reloc. */
3840 asection *sec;
3841
3842 /* Total number of relocs copied for the input section. */
3843 unsigned int count : 31;
3844
3845 /* Whether this entry is for STT_GNU_IFUNC symbols. */
3846 unsigned int ifunc : 1;
3847 };
3848
3849 struct ppc_link_hash_entry
3850 {
3851 struct elf_link_hash_entry elf;
3852
3853 union {
3854 /* A pointer to the most recently used stub hash entry against this
3855 symbol. */
3856 struct ppc_stub_hash_entry *stub_cache;
3857
3858 /* A pointer to the next symbol starting with a '.' */
3859 struct ppc_link_hash_entry *next_dot_sym;
3860 } u;
3861
3862 /* Track dynamic relocs copied for this symbol. */
3863 struct elf_dyn_relocs *dyn_relocs;
3864
3865 /* Link between function code and descriptor symbols. */
3866 struct ppc_link_hash_entry *oh;
3867
3868 /* Flag function code and descriptor symbols. */
3869 unsigned int is_func:1;
3870 unsigned int is_func_descriptor:1;
3871 unsigned int fake:1;
3872
3873 /* Whether global opd/toc sym has been adjusted or not.
3874 After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
3875 should be set for all globals defined in any opd/toc section. */
3876 unsigned int adjust_done:1;
3877
3878 /* Set if we twiddled this symbol to weak at some stage. */
3879 unsigned int was_undefined:1;
3880
3881 /* Contexts in which symbol is used in the GOT (or TOC).
3882 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
3883 corresponding relocs are encountered during check_relocs.
3884 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3885 indicate the corresponding GOT entry type is not needed.
3886 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
3887 a TPREL one. We use a separate flag rather than setting TPREL
3888 just for convenience in distinguishing the two cases. */
3889 #define TLS_GD 1 /* GD reloc. */
3890 #define TLS_LD 2 /* LD reloc. */
3891 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3892 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3893 #define TLS_TLS 16 /* Any TLS reloc. */
3894 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
3895 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
3896 #define PLT_IFUNC 128 /* STT_GNU_IFUNC. */
3897 unsigned char tls_mask;
3898 };
3899
3900 /* ppc64 ELF linker hash table. */
3901
3902 struct ppc_link_hash_table
3903 {
3904 struct elf_link_hash_table elf;
3905
3906 /* The stub hash table. */
3907 struct bfd_hash_table stub_hash_table;
3908
3909 /* Another hash table for plt_branch stubs. */
3910 struct bfd_hash_table branch_hash_table;
3911
3912 /* Hash table for function prologue tocsave. */
3913 htab_t tocsave_htab;
3914
3915 /* Various options and other info passed from the linker. */
3916 struct ppc64_elf_params *params;
3917
3918 /* Array to keep track of which stub sections have been created, and
3919 information on stub grouping. */
3920 struct map_stub {
3921 /* This is the section to which stubs in the group will be attached. */
3922 asection *link_sec;
3923 /* The stub section. */
3924 asection *stub_sec;
3925 /* Along with elf_gp, specifies the TOC pointer used in this group. */
3926 bfd_vma toc_off;
3927 } *stub_group;
3928
3929 /* Temp used when calculating TOC pointers. */
3930 bfd_vma toc_curr;
3931 bfd *toc_bfd;
3932 asection *toc_first_sec;
3933
3934 /* Highest input section id. */
3935 int top_id;
3936
3937 /* Highest output section index. */
3938 int top_index;
3939
3940 /* Used when adding symbols. */
3941 struct ppc_link_hash_entry *dot_syms;
3942
3943 /* List of input sections for each output section. */
3944 asection **input_list;
3945
3946 /* Shortcuts to get to dynamic linker sections. */
3947 asection *dynbss;
3948 asection *relbss;
3949 asection *glink;
3950 asection *sfpr;
3951 asection *brlt;
3952 asection *relbrlt;
3953 asection *glink_eh_frame;
3954
3955 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
3956 struct ppc_link_hash_entry *tls_get_addr;
3957 struct ppc_link_hash_entry *tls_get_addr_fd;
3958
3959 /* The size of reliplt used by got entry relocs. */
3960 bfd_size_type got_reli_size;
3961
3962 /* Statistics. */
3963 unsigned long stub_count[ppc_stub_global_entry];
3964
3965 /* Number of stubs against global syms. */
3966 unsigned long stub_globals;
3967
3968 /* Set if we're linking code with function descriptors. */
3969 unsigned int opd_abi:1;
3970
3971 /* Support for multiple toc sections. */
3972 unsigned int do_multi_toc:1;
3973 unsigned int multi_toc_needed:1;
3974 unsigned int second_toc_pass:1;
3975 unsigned int do_toc_opt:1;
3976
3977 /* Set on error. */
3978 unsigned int stub_error:1;
3979
3980 /* Temp used by ppc64_elf_before_check_relocs. */
3981 unsigned int twiddled_syms:1;
3982
3983 /* Incremented every time we size stubs. */
3984 unsigned int stub_iteration;
3985
3986 /* Small local sym cache. */
3987 struct sym_cache sym_cache;
3988 };
3989
3990 /* Rename some of the generic section flags to better document how they
3991 are used here. */
3992
3993 /* Nonzero if this section has TLS related relocations. */
3994 #define has_tls_reloc sec_flg0
3995
3996 /* Nonzero if this section has a call to __tls_get_addr. */
3997 #define has_tls_get_addr_call sec_flg1
3998
3999 /* Nonzero if this section has any toc or got relocs. */
4000 #define has_toc_reloc sec_flg2
4001
4002 /* Nonzero if this section has a call to another section that uses
4003 the toc or got. */
4004 #define makes_toc_func_call sec_flg3
4005
4006 /* Recursion protection when determining above flag. */
4007 #define call_check_in_progress sec_flg4
4008 #define call_check_done sec_flg5
4009
4010 /* Get the ppc64 ELF linker hash table from a link_info structure. */
4011
4012 #define ppc_hash_table(p) \
4013 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
4014 == PPC64_ELF_DATA ? ((struct ppc_link_hash_table *) ((p)->hash)) : NULL)
4015
4016 #define ppc_stub_hash_lookup(table, string, create, copy) \
4017 ((struct ppc_stub_hash_entry *) \
4018 bfd_hash_lookup ((table), (string), (create), (copy)))
4019
4020 #define ppc_branch_hash_lookup(table, string, create, copy) \
4021 ((struct ppc_branch_hash_entry *) \
4022 bfd_hash_lookup ((table), (string), (create), (copy)))
4023
4024 /* Create an entry in the stub hash table. */
4025
4026 static struct bfd_hash_entry *
4027 stub_hash_newfunc (struct bfd_hash_entry *entry,
4028 struct bfd_hash_table *table,
4029 const char *string)
4030 {
4031 /* Allocate the structure if it has not already been allocated by a
4032 subclass. */
4033 if (entry == NULL)
4034 {
4035 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
4036 if (entry == NULL)
4037 return entry;
4038 }
4039
4040 /* Call the allocation method of the superclass. */
4041 entry = bfd_hash_newfunc (entry, table, string);
4042 if (entry != NULL)
4043 {
4044 struct ppc_stub_hash_entry *eh;
4045
4046 /* Initialize the local fields. */
4047 eh = (struct ppc_stub_hash_entry *) entry;
4048 eh->stub_type = ppc_stub_none;
4049 eh->stub_sec = NULL;
4050 eh->stub_offset = 0;
4051 eh->target_value = 0;
4052 eh->target_section = NULL;
4053 eh->h = NULL;
4054 eh->plt_ent = NULL;
4055 eh->id_sec = NULL;
4056 eh->other = 0;
4057 }
4058
4059 return entry;
4060 }
4061
4062 /* Create an entry in the branch hash table. */
4063
4064 static struct bfd_hash_entry *
4065 branch_hash_newfunc (struct bfd_hash_entry *entry,
4066 struct bfd_hash_table *table,
4067 const char *string)
4068 {
4069 /* Allocate the structure if it has not already been allocated by a
4070 subclass. */
4071 if (entry == NULL)
4072 {
4073 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
4074 if (entry == NULL)
4075 return entry;
4076 }
4077
4078 /* Call the allocation method of the superclass. */
4079 entry = bfd_hash_newfunc (entry, table, string);
4080 if (entry != NULL)
4081 {
4082 struct ppc_branch_hash_entry *eh;
4083
4084 /* Initialize the local fields. */
4085 eh = (struct ppc_branch_hash_entry *) entry;
4086 eh->offset = 0;
4087 eh->iter = 0;
4088 }
4089
4090 return entry;
4091 }
4092
4093 /* Create an entry in a ppc64 ELF linker hash table. */
4094
4095 static struct bfd_hash_entry *
4096 link_hash_newfunc (struct bfd_hash_entry *entry,
4097 struct bfd_hash_table *table,
4098 const char *string)
4099 {
4100 /* Allocate the structure if it has not already been allocated by a
4101 subclass. */
4102 if (entry == NULL)
4103 {
4104 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
4105 if (entry == NULL)
4106 return entry;
4107 }
4108
4109 /* Call the allocation method of the superclass. */
4110 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
4111 if (entry != NULL)
4112 {
4113 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
4114
4115 memset (&eh->u.stub_cache, 0,
4116 (sizeof (struct ppc_link_hash_entry)
4117 - offsetof (struct ppc_link_hash_entry, u.stub_cache)));
4118
4119 /* When making function calls, old ABI code references function entry
4120 points (dot symbols), while new ABI code references the function
4121 descriptor symbol. We need to make any combination of reference and
4122 definition work together, without breaking archive linking.
4123
4124 For a defined function "foo" and an undefined call to "bar":
4125 An old object defines "foo" and ".foo", references ".bar" (possibly
4126 "bar" too).
4127 A new object defines "foo" and references "bar".
4128
4129 A new object thus has no problem with its undefined symbols being
4130 satisfied by definitions in an old object. On the other hand, the
4131 old object won't have ".bar" satisfied by a new object.
4132
4133 Keep a list of newly added dot-symbols. */
4134
4135 if (string[0] == '.')
4136 {
4137 struct ppc_link_hash_table *htab;
4138
4139 htab = (struct ppc_link_hash_table *) table;
4140 eh->u.next_dot_sym = htab->dot_syms;
4141 htab->dot_syms = eh;
4142 }
4143 }
4144
4145 return entry;
4146 }
4147
4148 struct tocsave_entry {
4149 asection *sec;
4150 bfd_vma offset;
4151 };
4152
4153 static hashval_t
4154 tocsave_htab_hash (const void *p)
4155 {
4156 const struct tocsave_entry *e = (const struct tocsave_entry *) p;
4157 return ((bfd_vma)(intptr_t) e->sec ^ e->offset) >> 3;
4158 }
4159
4160 static int
4161 tocsave_htab_eq (const void *p1, const void *p2)
4162 {
4163 const struct tocsave_entry *e1 = (const struct tocsave_entry *) p1;
4164 const struct tocsave_entry *e2 = (const struct tocsave_entry *) p2;
4165 return e1->sec == e2->sec && e1->offset == e2->offset;
4166 }
4167
4168 /* Destroy a ppc64 ELF linker hash table. */
4169
4170 static void
4171 ppc64_elf_link_hash_table_free (bfd *obfd)
4172 {
4173 struct ppc_link_hash_table *htab;
4174
4175 htab = (struct ppc_link_hash_table *) obfd->link.hash;
4176 if (htab->tocsave_htab)
4177 htab_delete (htab->tocsave_htab);
4178 bfd_hash_table_free (&htab->branch_hash_table);
4179 bfd_hash_table_free (&htab->stub_hash_table);
4180 _bfd_elf_link_hash_table_free (obfd);
4181 }
4182
4183 /* Create a ppc64 ELF linker hash table. */
4184
4185 static struct bfd_link_hash_table *
4186 ppc64_elf_link_hash_table_create (bfd *abfd)
4187 {
4188 struct ppc_link_hash_table *htab;
4189 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
4190
4191 htab = bfd_zmalloc (amt);
4192 if (htab == NULL)
4193 return NULL;
4194
4195 if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc,
4196 sizeof (struct ppc_link_hash_entry),
4197 PPC64_ELF_DATA))
4198 {
4199 free (htab);
4200 return NULL;
4201 }
4202
4203 /* Init the stub hash table too. */
4204 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc,
4205 sizeof (struct ppc_stub_hash_entry)))
4206 {
4207 _bfd_elf_link_hash_table_free (abfd);
4208 return NULL;
4209 }
4210
4211 /* And the branch hash table. */
4212 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc,
4213 sizeof (struct ppc_branch_hash_entry)))
4214 {
4215 bfd_hash_table_free (&htab->stub_hash_table);
4216 _bfd_elf_link_hash_table_free (abfd);
4217 return NULL;
4218 }
4219
4220 htab->tocsave_htab = htab_try_create (1024,
4221 tocsave_htab_hash,
4222 tocsave_htab_eq,
4223 NULL);
4224 if (htab->tocsave_htab == NULL)
4225 {
4226 ppc64_elf_link_hash_table_free (abfd);
4227 return NULL;
4228 }
4229 htab->elf.root.hash_table_free = ppc64_elf_link_hash_table_free;
4230
4231 /* Initializing two fields of the union is just cosmetic. We really
4232 only care about glist, but when compiled on a 32-bit host the
4233 bfd_vma fields are larger. Setting the bfd_vma to zero makes
4234 debugger inspection of these fields look nicer. */
4235 htab->elf.init_got_refcount.refcount = 0;
4236 htab->elf.init_got_refcount.glist = NULL;
4237 htab->elf.init_plt_refcount.refcount = 0;
4238 htab->elf.init_plt_refcount.glist = NULL;
4239 htab->elf.init_got_offset.offset = 0;
4240 htab->elf.init_got_offset.glist = NULL;
4241 htab->elf.init_plt_offset.offset = 0;
4242 htab->elf.init_plt_offset.glist = NULL;
4243
4244 return &htab->elf.root;
4245 }
4246
4247 /* Create sections for linker generated code. */
4248
4249 static bfd_boolean
4250 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
4251 {
4252 struct ppc_link_hash_table *htab;
4253 flagword flags;
4254
4255 htab = ppc_hash_table (info);
4256
4257 /* Create .sfpr for code to save and restore fp regs. */
4258 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
4259 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4260 htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr",
4261 flags);
4262 if (htab->sfpr == NULL
4263 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
4264 return FALSE;
4265
4266 /* Create .glink for lazy dynamic linking support. */
4267 htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink",
4268 flags);
4269 if (htab->glink == NULL
4270 || ! bfd_set_section_alignment (dynobj, htab->glink, 3))
4271 return FALSE;
4272
4273 if (!info->no_ld_generated_unwind_info)
4274 {
4275 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
4276 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4277 htab->glink_eh_frame = bfd_make_section_anyway_with_flags (dynobj,
4278 ".eh_frame",
4279 flags);
4280 if (htab->glink_eh_frame == NULL
4281 || !bfd_set_section_alignment (dynobj, htab->glink_eh_frame, 2))
4282 return FALSE;
4283 }
4284
4285 flags = SEC_ALLOC | SEC_LINKER_CREATED;
4286 htab->elf.iplt = bfd_make_section_anyway_with_flags (dynobj, ".iplt", flags);
4287 if (htab->elf.iplt == NULL
4288 || ! bfd_set_section_alignment (dynobj, htab->elf.iplt, 3))
4289 return FALSE;
4290
4291 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4292 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4293 htab->elf.irelplt
4294 = bfd_make_section_anyway_with_flags (dynobj, ".rela.iplt", flags);
4295 if (htab->elf.irelplt == NULL
4296 || ! bfd_set_section_alignment (dynobj, htab->elf.irelplt, 3))
4297 return FALSE;
4298
4299 /* Create branch lookup table for plt_branch stubs. */
4300 flags = (SEC_ALLOC | SEC_LOAD
4301 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4302 htab->brlt = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt",
4303 flags);
4304 if (htab->brlt == NULL
4305 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
4306 return FALSE;
4307
4308 if (!info->shared)
4309 return TRUE;
4310
4311 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4312 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4313 htab->relbrlt = bfd_make_section_anyway_with_flags (dynobj,
4314 ".rela.branch_lt",
4315 flags);
4316 if (htab->relbrlt == NULL
4317 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
4318 return FALSE;
4319
4320 return TRUE;
4321 }
4322
4323 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
4324
4325 bfd_boolean
4326 ppc64_elf_init_stub_bfd (struct bfd_link_info *info,
4327 struct ppc64_elf_params *params)
4328 {
4329 struct ppc_link_hash_table *htab;
4330
4331 elf_elfheader (params->stub_bfd)->e_ident[EI_CLASS] = ELFCLASS64;
4332
4333 /* Always hook our dynamic sections into the first bfd, which is the
4334 linker created stub bfd. This ensures that the GOT header is at
4335 the start of the output TOC section. */
4336 htab = ppc_hash_table (info);
4337 if (htab == NULL)
4338 return FALSE;
4339 htab->elf.dynobj = params->stub_bfd;
4340 htab->params = params;
4341
4342 if (info->relocatable)
4343 return TRUE;
4344
4345 return create_linkage_sections (htab->elf.dynobj, info);
4346 }
4347
4348 /* Build a name for an entry in the stub hash table. */
4349
4350 static char *
4351 ppc_stub_name (const asection *input_section,
4352 const asection *sym_sec,
4353 const struct ppc_link_hash_entry *h,
4354 const Elf_Internal_Rela *rel)
4355 {
4356 char *stub_name;
4357 ssize_t len;
4358
4359 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
4360 offsets from a sym as a branch target? In fact, we could
4361 probably assume the addend is always zero. */
4362 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
4363
4364 if (h)
4365 {
4366 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
4367 stub_name = bfd_malloc (len);
4368 if (stub_name == NULL)
4369 return stub_name;
4370
4371 len = sprintf (stub_name, "%08x.%s+%x",
4372 input_section->id & 0xffffffff,
4373 h->elf.root.root.string,
4374 (int) rel->r_addend & 0xffffffff);
4375 }
4376 else
4377 {
4378 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
4379 stub_name = bfd_malloc (len);
4380 if (stub_name == NULL)
4381 return stub_name;
4382
4383 len = sprintf (stub_name, "%08x.%x:%x+%x",
4384 input_section->id & 0xffffffff,
4385 sym_sec->id & 0xffffffff,
4386 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
4387 (int) rel->r_addend & 0xffffffff);
4388 }
4389 if (len > 2 && stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
4390 stub_name[len - 2] = 0;
4391 return stub_name;
4392 }
4393
4394 /* Look up an entry in the stub hash. Stub entries are cached because
4395 creating the stub name takes a bit of time. */
4396
4397 static struct ppc_stub_hash_entry *
4398 ppc_get_stub_entry (const asection *input_section,
4399 const asection *sym_sec,
4400 struct ppc_link_hash_entry *h,
4401 const Elf_Internal_Rela *rel,
4402 struct ppc_link_hash_table *htab)
4403 {
4404 struct ppc_stub_hash_entry *stub_entry;
4405 const asection *id_sec;
4406
4407 /* If this input section is part of a group of sections sharing one
4408 stub section, then use the id of the first section in the group.
4409 Stub names need to include a section id, as there may well be
4410 more than one stub used to reach say, printf, and we need to
4411 distinguish between them. */
4412 id_sec = htab->stub_group[input_section->id].link_sec;
4413
4414 if (h != NULL && h->u.stub_cache != NULL
4415 && h->u.stub_cache->h == h
4416 && h->u.stub_cache->id_sec == id_sec)
4417 {
4418 stub_entry = h->u.stub_cache;
4419 }
4420 else
4421 {
4422 char *stub_name;
4423
4424 stub_name = ppc_stub_name (id_sec, sym_sec, h, rel);
4425 if (stub_name == NULL)
4426 return NULL;
4427
4428 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
4429 stub_name, FALSE, FALSE);
4430 if (h != NULL)
4431 h->u.stub_cache = stub_entry;
4432
4433 free (stub_name);
4434 }
4435
4436 return stub_entry;
4437 }
4438
4439 /* Add a new stub entry to the stub hash. Not all fields of the new
4440 stub entry are initialised. */
4441
4442 static struct ppc_stub_hash_entry *
4443 ppc_add_stub (const char *stub_name,
4444 asection *section,
4445 struct bfd_link_info *info)
4446 {
4447 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4448 asection *link_sec;
4449 asection *stub_sec;
4450 struct ppc_stub_hash_entry *stub_entry;
4451
4452 link_sec = htab->stub_group[section->id].link_sec;
4453 stub_sec = htab->stub_group[section->id].stub_sec;
4454 if (stub_sec == NULL)
4455 {
4456 stub_sec = htab->stub_group[link_sec->id].stub_sec;
4457 if (stub_sec == NULL)
4458 {
4459 size_t namelen;
4460 bfd_size_type len;
4461 char *s_name;
4462
4463 namelen = strlen (link_sec->name);
4464 len = namelen + sizeof (STUB_SUFFIX);
4465 s_name = bfd_alloc (htab->params->stub_bfd, len);
4466 if (s_name == NULL)
4467 return NULL;
4468
4469 memcpy (s_name, link_sec->name, namelen);
4470 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
4471 stub_sec = (*htab->params->add_stub_section) (s_name, link_sec);
4472 if (stub_sec == NULL)
4473 return NULL;
4474 htab->stub_group[link_sec->id].stub_sec = stub_sec;
4475 }
4476 htab->stub_group[section->id].stub_sec = stub_sec;
4477 }
4478
4479 /* Enter this entry into the linker stub hash table. */
4480 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
4481 TRUE, FALSE);
4482 if (stub_entry == NULL)
4483 {
4484 info->callbacks->einfo (_("%P: %B: cannot create stub entry %s\n"),
4485 section->owner, stub_name);
4486 return NULL;
4487 }
4488
4489 stub_entry->stub_sec = stub_sec;
4490 stub_entry->stub_offset = 0;
4491 stub_entry->id_sec = link_sec;
4492 return stub_entry;
4493 }
4494
4495 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
4496 not already done. */
4497
4498 static bfd_boolean
4499 create_got_section (bfd *abfd, struct bfd_link_info *info)
4500 {
4501 asection *got, *relgot;
4502 flagword flags;
4503 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4504
4505 if (!is_ppc64_elf (abfd))
4506 return FALSE;
4507 if (htab == NULL)
4508 return FALSE;
4509
4510 if (!htab->elf.sgot
4511 && !_bfd_elf_create_got_section (htab->elf.dynobj, info))
4512 return FALSE;
4513
4514 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
4515 | SEC_LINKER_CREATED);
4516
4517 got = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
4518 if (!got
4519 || !bfd_set_section_alignment (abfd, got, 3))
4520 return FALSE;
4521
4522 relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got",
4523 flags | SEC_READONLY);
4524 if (!relgot
4525 || ! bfd_set_section_alignment (abfd, relgot, 3))
4526 return FALSE;
4527
4528 ppc64_elf_tdata (abfd)->got = got;
4529 ppc64_elf_tdata (abfd)->relgot = relgot;
4530 return TRUE;
4531 }
4532
4533 /* Create the dynamic sections, and set up shortcuts. */
4534
4535 static bfd_boolean
4536 ppc64_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
4537 {
4538 struct ppc_link_hash_table *htab;
4539
4540 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
4541 return FALSE;
4542
4543 htab = ppc_hash_table (info);
4544 if (htab == NULL)
4545 return FALSE;
4546
4547 htab->dynbss = bfd_get_linker_section (dynobj, ".dynbss");
4548 if (!info->shared)
4549 htab->relbss = bfd_get_linker_section (dynobj, ".rela.bss");
4550
4551 if (!htab->elf.sgot || !htab->elf.splt || !htab->elf.srelplt || !htab->dynbss
4552 || (!info->shared && !htab->relbss))
4553 abort ();
4554
4555 return TRUE;
4556 }
4557
4558 /* Follow indirect and warning symbol links. */
4559
4560 static inline struct bfd_link_hash_entry *
4561 follow_link (struct bfd_link_hash_entry *h)
4562 {
4563 while (h->type == bfd_link_hash_indirect
4564 || h->type == bfd_link_hash_warning)
4565 h = h->u.i.link;
4566 return h;
4567 }
4568
4569 static inline struct elf_link_hash_entry *
4570 elf_follow_link (struct elf_link_hash_entry *h)
4571 {
4572 return (struct elf_link_hash_entry *) follow_link (&h->root);
4573 }
4574
4575 static inline struct ppc_link_hash_entry *
4576 ppc_follow_link (struct ppc_link_hash_entry *h)
4577 {
4578 return (struct ppc_link_hash_entry *) follow_link (&h->elf.root);
4579 }
4580
4581 /* Merge PLT info on FROM with that on TO. */
4582
4583 static void
4584 move_plt_plist (struct ppc_link_hash_entry *from,
4585 struct ppc_link_hash_entry *to)
4586 {
4587 if (from->elf.plt.plist != NULL)
4588 {
4589 if (to->elf.plt.plist != NULL)
4590 {
4591 struct plt_entry **entp;
4592 struct plt_entry *ent;
4593
4594 for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; )
4595 {
4596 struct plt_entry *dent;
4597
4598 for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next)
4599 if (dent->addend == ent->addend)
4600 {
4601 dent->plt.refcount += ent->plt.refcount;
4602 *entp = ent->next;
4603 break;
4604 }
4605 if (dent == NULL)
4606 entp = &ent->next;
4607 }
4608 *entp = to->elf.plt.plist;
4609 }
4610
4611 to->elf.plt.plist = from->elf.plt.plist;
4612 from->elf.plt.plist = NULL;
4613 }
4614 }
4615
4616 /* Copy the extra info we tack onto an elf_link_hash_entry. */
4617
4618 static void
4619 ppc64_elf_copy_indirect_symbol (struct bfd_link_info *info,
4620 struct elf_link_hash_entry *dir,
4621 struct elf_link_hash_entry *ind)
4622 {
4623 struct ppc_link_hash_entry *edir, *eind;
4624
4625 edir = (struct ppc_link_hash_entry *) dir;
4626 eind = (struct ppc_link_hash_entry *) ind;
4627
4628 edir->is_func |= eind->is_func;
4629 edir->is_func_descriptor |= eind->is_func_descriptor;
4630 edir->tls_mask |= eind->tls_mask;
4631 if (eind->oh != NULL)
4632 edir->oh = ppc_follow_link (eind->oh);
4633
4634 /* If called to transfer flags for a weakdef during processing
4635 of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF.
4636 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
4637 if (!(ELIMINATE_COPY_RELOCS
4638 && eind->elf.root.type != bfd_link_hash_indirect
4639 && edir->elf.dynamic_adjusted))
4640 edir->elf.non_got_ref |= eind->elf.non_got_ref;
4641
4642 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
4643 edir->elf.ref_regular |= eind->elf.ref_regular;
4644 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
4645 edir->elf.needs_plt |= eind->elf.needs_plt;
4646 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed;
4647
4648 /* Copy over any dynamic relocs we may have on the indirect sym. */
4649 if (eind->dyn_relocs != NULL)
4650 {
4651 if (edir->dyn_relocs != NULL)
4652 {
4653 struct elf_dyn_relocs **pp;
4654 struct elf_dyn_relocs *p;
4655
4656 /* Add reloc counts against the indirect sym to the direct sym
4657 list. Merge any entries against the same section. */
4658 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
4659 {
4660 struct elf_dyn_relocs *q;
4661
4662 for (q = edir->dyn_relocs; q != NULL; q = q->next)
4663 if (q->sec == p->sec)
4664 {
4665 q->pc_count += p->pc_count;
4666 q->count += p->count;
4667 *pp = p->next;
4668 break;
4669 }
4670 if (q == NULL)
4671 pp = &p->next;
4672 }
4673 *pp = edir->dyn_relocs;
4674 }
4675
4676 edir->dyn_relocs = eind->dyn_relocs;
4677 eind->dyn_relocs = NULL;
4678 }
4679
4680 /* If we were called to copy over info for a weak sym, that's all.
4681 You might think dyn_relocs need not be copied over; After all,
4682 both syms will be dynamic or both non-dynamic so we're just
4683 moving reloc accounting around. However, ELIMINATE_COPY_RELOCS
4684 code in ppc64_elf_adjust_dynamic_symbol needs to check for
4685 dyn_relocs in read-only sections, and it does so on what is the
4686 DIR sym here. */
4687 if (eind->elf.root.type != bfd_link_hash_indirect)
4688 return;
4689
4690 /* Copy over got entries that we may have already seen to the
4691 symbol which just became indirect. */
4692 if (eind->elf.got.glist != NULL)
4693 {
4694 if (edir->elf.got.glist != NULL)
4695 {
4696 struct got_entry **entp;
4697 struct got_entry *ent;
4698
4699 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
4700 {
4701 struct got_entry *dent;
4702
4703 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
4704 if (dent->addend == ent->addend
4705 && dent->owner == ent->owner
4706 && dent->tls_type == ent->tls_type)
4707 {
4708 dent->got.refcount += ent->got.refcount;
4709 *entp = ent->next;
4710 break;
4711 }
4712 if (dent == NULL)
4713 entp = &ent->next;
4714 }
4715 *entp = edir->elf.got.glist;
4716 }
4717
4718 edir->elf.got.glist = eind->elf.got.glist;
4719 eind->elf.got.glist = NULL;
4720 }
4721
4722 /* And plt entries. */
4723 move_plt_plist (eind, edir);
4724
4725 if (eind->elf.dynindx != -1)
4726 {
4727 if (edir->elf.dynindx != -1)
4728 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4729 edir->elf.dynstr_index);
4730 edir->elf.dynindx = eind->elf.dynindx;
4731 edir->elf.dynstr_index = eind->elf.dynstr_index;
4732 eind->elf.dynindx = -1;
4733 eind->elf.dynstr_index = 0;
4734 }
4735 }
4736
4737 /* Find the function descriptor hash entry from the given function code
4738 hash entry FH. Link the entries via their OH fields. */
4739
4740 static struct ppc_link_hash_entry *
4741 lookup_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
4742 {
4743 struct ppc_link_hash_entry *fdh = fh->oh;
4744
4745 if (fdh == NULL)
4746 {
4747 const char *fd_name = fh->elf.root.root.string + 1;
4748
4749 fdh = (struct ppc_link_hash_entry *)
4750 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
4751 if (fdh == NULL)
4752 return fdh;
4753
4754 fdh->is_func_descriptor = 1;
4755 fdh->oh = fh;
4756 fh->is_func = 1;
4757 fh->oh = fdh;
4758 }
4759
4760 return ppc_follow_link (fdh);
4761 }
4762
4763 /* Make a fake function descriptor sym for the code sym FH. */
4764
4765 static struct ppc_link_hash_entry *
4766 make_fdh (struct bfd_link_info *info,
4767 struct ppc_link_hash_entry *fh)
4768 {
4769 bfd *abfd;
4770 asymbol *newsym;
4771 struct bfd_link_hash_entry *bh;
4772 struct ppc_link_hash_entry *fdh;
4773
4774 abfd = fh->elf.root.u.undef.abfd;
4775 newsym = bfd_make_empty_symbol (abfd);
4776 newsym->name = fh->elf.root.root.string + 1;
4777 newsym->section = bfd_und_section_ptr;
4778 newsym->value = 0;
4779 newsym->flags = BSF_WEAK;
4780
4781 bh = NULL;
4782 if (!_bfd_generic_link_add_one_symbol (info, abfd, newsym->name,
4783 newsym->flags, newsym->section,
4784 newsym->value, NULL, FALSE, FALSE,
4785 &bh))
4786 return NULL;
4787
4788 fdh = (struct ppc_link_hash_entry *) bh;
4789 fdh->elf.non_elf = 0;
4790 fdh->fake = 1;
4791 fdh->is_func_descriptor = 1;
4792 fdh->oh = fh;
4793 fh->is_func = 1;
4794 fh->oh = fdh;
4795 return fdh;
4796 }
4797
4798 /* Fix function descriptor symbols defined in .opd sections to be
4799 function type. */
4800
4801 static bfd_boolean
4802 ppc64_elf_add_symbol_hook (bfd *ibfd,
4803 struct bfd_link_info *info,
4804 Elf_Internal_Sym *isym,
4805 const char **name,
4806 flagword *flags ATTRIBUTE_UNUSED,
4807 asection **sec,
4808 bfd_vma *value ATTRIBUTE_UNUSED)
4809 {
4810 if ((ibfd->flags & DYNAMIC) == 0
4811 && ELF_ST_BIND (isym->st_info) == STB_GNU_UNIQUE)
4812 elf_tdata (info->output_bfd)->has_gnu_symbols = TRUE;
4813
4814 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
4815 {
4816 if ((ibfd->flags & DYNAMIC) == 0)
4817 elf_tdata (info->output_bfd)->has_gnu_symbols = TRUE;
4818 }
4819 else if (ELF_ST_TYPE (isym->st_info) == STT_FUNC)
4820 ;
4821 else if (*sec != NULL
4822 && strcmp ((*sec)->name, ".opd") == 0)
4823 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
4824
4825 if ((STO_PPC64_LOCAL_MASK & isym->st_other) != 0)
4826 {
4827 if (abiversion (ibfd) == 0)
4828 set_abiversion (ibfd, 2);
4829 else if (abiversion (ibfd) == 1)
4830 {
4831 info->callbacks->einfo (_("%P: symbol '%s' has invalid st_other"
4832 " for ABI version 1\n"), name);
4833 bfd_set_error (bfd_error_bad_value);
4834 return FALSE;
4835 }
4836 }
4837
4838 return TRUE;
4839 }
4840
4841 /* Merge non-visibility st_other attributes: local entry point. */
4842
4843 static void
4844 ppc64_elf_merge_symbol_attribute (struct elf_link_hash_entry *h,
4845 const Elf_Internal_Sym *isym,
4846 bfd_boolean definition,
4847 bfd_boolean dynamic)
4848 {
4849 if (definition && !dynamic)
4850 h->other = ((isym->st_other & ~ELF_ST_VISIBILITY (-1))
4851 | ELF_ST_VISIBILITY (h->other));
4852 }
4853
4854 /* This function makes an old ABI object reference to ".bar" cause the
4855 inclusion of a new ABI object archive that defines "bar".
4856 NAME is a symbol defined in an archive. Return a symbol in the hash
4857 table that might be satisfied by the archive symbols. */
4858
4859 static struct elf_link_hash_entry *
4860 ppc64_elf_archive_symbol_lookup (bfd *abfd,
4861 struct bfd_link_info *info,
4862 const char *name)
4863 {
4864 struct elf_link_hash_entry *h;
4865 char *dot_name;
4866 size_t len;
4867
4868 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
4869 if (h != NULL
4870 /* Don't return this sym if it is a fake function descriptor
4871 created by add_symbol_adjust. */
4872 && !(h->root.type == bfd_link_hash_undefweak
4873 && ((struct ppc_link_hash_entry *) h)->fake))
4874 return h;
4875
4876 if (name[0] == '.')
4877 return h;
4878
4879 len = strlen (name);
4880 dot_name = bfd_alloc (abfd, len + 2);
4881 if (dot_name == NULL)
4882 return (struct elf_link_hash_entry *) 0 - 1;
4883 dot_name[0] = '.';
4884 memcpy (dot_name + 1, name, len + 1);
4885 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
4886 bfd_release (abfd, dot_name);
4887 return h;
4888 }
4889
4890 /* This function satisfies all old ABI object references to ".bar" if a
4891 new ABI object defines "bar". Well, at least, undefined dot symbols
4892 are made weak. This stops later archive searches from including an
4893 object if we already have a function descriptor definition. It also
4894 prevents the linker complaining about undefined symbols.
4895 We also check and correct mismatched symbol visibility here. The
4896 most restrictive visibility of the function descriptor and the
4897 function entry symbol is used. */
4898
4899 static bfd_boolean
4900 add_symbol_adjust (struct ppc_link_hash_entry *eh, struct bfd_link_info *info)
4901 {
4902 struct ppc_link_hash_table *htab;
4903 struct ppc_link_hash_entry *fdh;
4904
4905 if (eh->elf.root.type == bfd_link_hash_indirect)
4906 return TRUE;
4907
4908 if (eh->elf.root.type == bfd_link_hash_warning)
4909 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
4910
4911 if (eh->elf.root.root.string[0] != '.')
4912 abort ();
4913
4914 htab = ppc_hash_table (info);
4915 if (htab == NULL)
4916 return FALSE;
4917
4918 fdh = lookup_fdh (eh, htab);
4919 if (fdh == NULL)
4920 {
4921 if (!info->relocatable
4922 && (eh->elf.root.type == bfd_link_hash_undefined
4923 || eh->elf.root.type == bfd_link_hash_undefweak)
4924 && eh->elf.ref_regular)
4925 {
4926 /* Make an undefweak function descriptor sym, which is enough to
4927 pull in an --as-needed shared lib, but won't cause link
4928 errors. Archives are handled elsewhere. */
4929 fdh = make_fdh (info, eh);
4930 if (fdh == NULL)
4931 return FALSE;
4932 fdh->elf.ref_regular = 1;
4933 }
4934 }
4935 else
4936 {
4937 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
4938 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
4939 if (entry_vis < descr_vis)
4940 fdh->elf.other += entry_vis - descr_vis;
4941 else if (entry_vis > descr_vis)
4942 eh->elf.other += descr_vis - entry_vis;
4943
4944 if ((fdh->elf.root.type == bfd_link_hash_defined
4945 || fdh->elf.root.type == bfd_link_hash_defweak)
4946 && eh->elf.root.type == bfd_link_hash_undefined)
4947 {
4948 eh->elf.root.type = bfd_link_hash_undefweak;
4949 eh->was_undefined = 1;
4950 htab->twiddled_syms = 1;
4951 }
4952 }
4953
4954 return TRUE;
4955 }
4956
4957 /* Set up opd section info and abiversion for IBFD, and process list
4958 of dot-symbols we made in link_hash_newfunc. */
4959
4960 static bfd_boolean
4961 ppc64_elf_before_check_relocs (bfd *ibfd, struct bfd_link_info *info)
4962 {
4963 struct ppc_link_hash_table *htab;
4964 struct ppc_link_hash_entry **p, *eh;
4965
4966 if (!is_ppc64_elf (info->output_bfd))
4967 return TRUE;
4968 htab = ppc_hash_table (info);
4969 if (htab == NULL)
4970 return FALSE;
4971
4972 if (is_ppc64_elf (ibfd))
4973 {
4974 asection *opd = bfd_get_section_by_name (ibfd, ".opd");
4975
4976 if (opd != NULL && opd->size != 0)
4977 {
4978 if (abiversion (ibfd) == 0)
4979 set_abiversion (ibfd, 1);
4980 else if (abiversion (ibfd) == 2)
4981 {
4982 info->callbacks->einfo (_("%P: %B .opd not allowed in ABI"
4983 " version %d\n"),
4984 ibfd, abiversion (ibfd));
4985 bfd_set_error (bfd_error_bad_value);
4986 return FALSE;
4987 }
4988
4989 if ((ibfd->flags & DYNAMIC) == 0
4990 && (opd->flags & SEC_RELOC) != 0
4991 && opd->reloc_count != 0
4992 && !bfd_is_abs_section (opd->output_section))
4993 {
4994 /* Garbage collection needs some extra help with .opd sections.
4995 We don't want to necessarily keep everything referenced by
4996 relocs in .opd, as that would keep all functions. Instead,
4997 if we reference an .opd symbol (a function descriptor), we
4998 want to keep the function code symbol's section. This is
4999 easy for global symbols, but for local syms we need to keep
5000 information about the associated function section. */
5001 bfd_size_type amt;
5002 asection **opd_sym_map;
5003
5004 amt = opd->size * sizeof (*opd_sym_map) / 8;
5005 opd_sym_map = bfd_zalloc (ibfd, amt);
5006 if (opd_sym_map == NULL)
5007 return FALSE;
5008 ppc64_elf_section_data (opd)->u.opd.func_sec = opd_sym_map;
5009 BFD_ASSERT (ppc64_elf_section_data (opd)->sec_type == sec_normal);
5010 ppc64_elf_section_data (opd)->sec_type = sec_opd;
5011 }
5012 }
5013
5014 /* For input files without an explicit abiversion in e_flags
5015 we should have flagged any with symbol st_other bits set
5016 as ELFv1 and above flagged those with .opd as ELFv2.
5017 Set the output abiversion if not yet set, and for any input
5018 still ambiguous, take its abiversion from the output.
5019 Differences in ABI are reported later. */
5020 if (abiversion (info->output_bfd) == 0)
5021 set_abiversion (info->output_bfd, abiversion (ibfd));
5022 else if (abiversion (ibfd) == 0)
5023 set_abiversion (ibfd, abiversion (info->output_bfd));
5024
5025 p = &htab->dot_syms;
5026 while ((eh = *p) != NULL)
5027 {
5028 *p = NULL;
5029 if (&eh->elf == htab->elf.hgot)
5030 ;
5031 else if (htab->elf.hgot == NULL
5032 && strcmp (eh->elf.root.root.string, ".TOC.") == 0)
5033 htab->elf.hgot = &eh->elf;
5034 else if (!add_symbol_adjust (eh, info))
5035 return FALSE;
5036 p = &eh->u.next_dot_sym;
5037 }
5038 }
5039
5040 /* Clear the list for non-ppc64 input files. */
5041 p = &htab->dot_syms;
5042 while ((eh = *p) != NULL)
5043 {
5044 *p = NULL;
5045 p = &eh->u.next_dot_sym;
5046 }
5047
5048 /* We need to fix the undefs list for any syms we have twiddled to
5049 undef_weak. */
5050 if (htab->twiddled_syms)
5051 {
5052 bfd_link_repair_undef_list (&htab->elf.root);
5053 htab->twiddled_syms = 0;
5054 }
5055 return TRUE;
5056 }
5057
5058 /* Undo hash table changes when an --as-needed input file is determined
5059 not to be needed. */
5060
5061 static bfd_boolean
5062 ppc64_elf_notice_as_needed (bfd *ibfd,
5063 struct bfd_link_info *info,
5064 enum notice_asneeded_action act)
5065 {
5066 if (act == notice_not_needed)
5067 {
5068 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5069
5070 if (htab == NULL)
5071 return FALSE;
5072
5073 htab->dot_syms = NULL;
5074 }
5075 return _bfd_elf_notice_as_needed (ibfd, info, act);
5076 }
5077
5078 /* If --just-symbols against a final linked binary, then assume we need
5079 toc adjusting stubs when calling functions defined there. */
5080
5081 static void
5082 ppc64_elf_link_just_syms (asection *sec, struct bfd_link_info *info)
5083 {
5084 if ((sec->flags & SEC_CODE) != 0
5085 && (sec->owner->flags & (EXEC_P | DYNAMIC)) != 0
5086 && is_ppc64_elf (sec->owner))
5087 {
5088 if (abiversion (sec->owner) >= 2
5089 || bfd_get_section_by_name (sec->owner, ".opd") != NULL)
5090 sec->has_toc_reloc = 1;
5091 }
5092 _bfd_elf_link_just_syms (sec, info);
5093 }
5094
5095 static struct plt_entry **
5096 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
5097 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
5098 {
5099 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
5100 struct plt_entry **local_plt;
5101 unsigned char *local_got_tls_masks;
5102
5103 if (local_got_ents == NULL)
5104 {
5105 bfd_size_type size = symtab_hdr->sh_info;
5106
5107 size *= (sizeof (*local_got_ents)
5108 + sizeof (*local_plt)
5109 + sizeof (*local_got_tls_masks));
5110 local_got_ents = bfd_zalloc (abfd, size);
5111 if (local_got_ents == NULL)
5112 return NULL;
5113 elf_local_got_ents (abfd) = local_got_ents;
5114 }
5115
5116 if ((tls_type & (PLT_IFUNC | TLS_EXPLICIT)) == 0)
5117 {
5118 struct got_entry *ent;
5119
5120 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
5121 if (ent->addend == r_addend
5122 && ent->owner == abfd
5123 && ent->tls_type == tls_type)
5124 break;
5125 if (ent == NULL)
5126 {
5127 bfd_size_type amt = sizeof (*ent);
5128 ent = bfd_alloc (abfd, amt);
5129 if (ent == NULL)
5130 return FALSE;
5131 ent->next = local_got_ents[r_symndx];
5132 ent->addend = r_addend;
5133 ent->owner = abfd;
5134 ent->tls_type = tls_type;
5135 ent->is_indirect = FALSE;
5136 ent->got.refcount = 0;
5137 local_got_ents[r_symndx] = ent;
5138 }
5139 ent->got.refcount += 1;
5140 }
5141
5142 local_plt = (struct plt_entry **) (local_got_ents + symtab_hdr->sh_info);
5143 local_got_tls_masks = (unsigned char *) (local_plt + symtab_hdr->sh_info);
5144 local_got_tls_masks[r_symndx] |= tls_type;
5145
5146 return local_plt + r_symndx;
5147 }
5148
5149 static bfd_boolean
5150 update_plt_info (bfd *abfd, struct plt_entry **plist, bfd_vma addend)
5151 {
5152 struct plt_entry *ent;
5153
5154 for (ent = *plist; ent != NULL; ent = ent->next)
5155 if (ent->addend == addend)
5156 break;
5157 if (ent == NULL)
5158 {
5159 bfd_size_type amt = sizeof (*ent);
5160 ent = bfd_alloc (abfd, amt);
5161 if (ent == NULL)
5162 return FALSE;
5163 ent->next = *plist;
5164 ent->addend = addend;
5165 ent->plt.refcount = 0;
5166 *plist = ent;
5167 }
5168 ent->plt.refcount += 1;
5169 return TRUE;
5170 }
5171
5172 static bfd_boolean
5173 is_branch_reloc (enum elf_ppc64_reloc_type r_type)
5174 {
5175 return (r_type == R_PPC64_REL24
5176 || r_type == R_PPC64_REL14
5177 || r_type == R_PPC64_REL14_BRTAKEN
5178 || r_type == R_PPC64_REL14_BRNTAKEN
5179 || r_type == R_PPC64_ADDR24
5180 || r_type == R_PPC64_ADDR14
5181 || r_type == R_PPC64_ADDR14_BRTAKEN
5182 || r_type == R_PPC64_ADDR14_BRNTAKEN);
5183 }
5184
5185 /* Look through the relocs for a section during the first phase, and
5186 calculate needed space in the global offset table, procedure
5187 linkage table, and dynamic reloc sections. */
5188
5189 static bfd_boolean
5190 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
5191 asection *sec, const Elf_Internal_Rela *relocs)
5192 {
5193 struct ppc_link_hash_table *htab;
5194 Elf_Internal_Shdr *symtab_hdr;
5195 struct elf_link_hash_entry **sym_hashes;
5196 const Elf_Internal_Rela *rel;
5197 const Elf_Internal_Rela *rel_end;
5198 asection *sreloc;
5199 asection **opd_sym_map;
5200 struct elf_link_hash_entry *tga, *dottga;
5201
5202 if (info->relocatable)
5203 return TRUE;
5204
5205 /* Don't do anything special with non-loaded, non-alloced sections.
5206 In particular, any relocs in such sections should not affect GOT
5207 and PLT reference counting (ie. we don't allow them to create GOT
5208 or PLT entries), there's no possibility or desire to optimize TLS
5209 relocs, and there's not much point in propagating relocs to shared
5210 libs that the dynamic linker won't relocate. */
5211 if ((sec->flags & SEC_ALLOC) == 0)
5212 return TRUE;
5213
5214 BFD_ASSERT (is_ppc64_elf (abfd));
5215
5216 htab = ppc_hash_table (info);
5217 if (htab == NULL)
5218 return FALSE;
5219
5220 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
5221 FALSE, FALSE, TRUE);
5222 dottga = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
5223 FALSE, FALSE, TRUE);
5224 symtab_hdr = &elf_symtab_hdr (abfd);
5225 sym_hashes = elf_sym_hashes (abfd);
5226 sreloc = NULL;
5227 opd_sym_map = NULL;
5228 if (ppc64_elf_section_data (sec) != NULL
5229 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
5230 opd_sym_map = ppc64_elf_section_data (sec)->u.opd.func_sec;
5231
5232 rel_end = relocs + sec->reloc_count;
5233 for (rel = relocs; rel < rel_end; rel++)
5234 {
5235 unsigned long r_symndx;
5236 struct elf_link_hash_entry *h;
5237 enum elf_ppc64_reloc_type r_type;
5238 int tls_type;
5239 struct _ppc64_elf_section_data *ppc64_sec;
5240 struct plt_entry **ifunc;
5241
5242 r_symndx = ELF64_R_SYM (rel->r_info);
5243 if (r_symndx < symtab_hdr->sh_info)
5244 h = NULL;
5245 else
5246 {
5247 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5248 h = elf_follow_link (h);
5249
5250 /* PR15323, ref flags aren't set for references in the same
5251 object. */
5252 h->root.non_ir_ref = 1;
5253
5254 if (h == htab->elf.hgot)
5255 sec->has_toc_reloc = 1;
5256 }
5257
5258 tls_type = 0;
5259 ifunc = NULL;
5260 if (h != NULL)
5261 {
5262 if (h->type == STT_GNU_IFUNC)
5263 {
5264 h->needs_plt = 1;
5265 ifunc = &h->plt.plist;
5266 }
5267 }
5268 else
5269 {
5270 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5271 abfd, r_symndx);
5272 if (isym == NULL)
5273 return FALSE;
5274
5275 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
5276 {
5277 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
5278 rel->r_addend, PLT_IFUNC);
5279 if (ifunc == NULL)
5280 return FALSE;
5281 }
5282 }
5283 r_type = ELF64_R_TYPE (rel->r_info);
5284 if (is_branch_reloc (r_type))
5285 {
5286 if (h != NULL && (h == tga || h == dottga))
5287 {
5288 if (rel != relocs
5289 && (ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSGD
5290 || ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSLD))
5291 /* We have a new-style __tls_get_addr call with a marker
5292 reloc. */
5293 ;
5294 else
5295 /* Mark this section as having an old-style call. */
5296 sec->has_tls_get_addr_call = 1;
5297 }
5298
5299 /* STT_GNU_IFUNC symbols must have a PLT entry. */
5300 if (ifunc != NULL
5301 && !update_plt_info (abfd, ifunc, rel->r_addend))
5302 return FALSE;
5303 }
5304
5305 switch (r_type)
5306 {
5307 case R_PPC64_TLSGD:
5308 case R_PPC64_TLSLD:
5309 /* These special tls relocs tie a call to __tls_get_addr with
5310 its parameter symbol. */
5311 break;
5312
5313 case R_PPC64_GOT_TLSLD16:
5314 case R_PPC64_GOT_TLSLD16_LO:
5315 case R_PPC64_GOT_TLSLD16_HI:
5316 case R_PPC64_GOT_TLSLD16_HA:
5317 tls_type = TLS_TLS | TLS_LD;
5318 goto dogottls;
5319
5320 case R_PPC64_GOT_TLSGD16:
5321 case R_PPC64_GOT_TLSGD16_LO:
5322 case R_PPC64_GOT_TLSGD16_HI:
5323 case R_PPC64_GOT_TLSGD16_HA:
5324 tls_type = TLS_TLS | TLS_GD;
5325 goto dogottls;
5326
5327 case R_PPC64_GOT_TPREL16_DS:
5328 case R_PPC64_GOT_TPREL16_LO_DS:
5329 case R_PPC64_GOT_TPREL16_HI:
5330 case R_PPC64_GOT_TPREL16_HA:
5331 if (info->shared)
5332 info->flags |= DF_STATIC_TLS;
5333 tls_type = TLS_TLS | TLS_TPREL;
5334 goto dogottls;
5335
5336 case R_PPC64_GOT_DTPREL16_DS:
5337 case R_PPC64_GOT_DTPREL16_LO_DS:
5338 case R_PPC64_GOT_DTPREL16_HI:
5339 case R_PPC64_GOT_DTPREL16_HA:
5340 tls_type = TLS_TLS | TLS_DTPREL;
5341 dogottls:
5342 sec->has_tls_reloc = 1;
5343 /* Fall thru */
5344
5345 case R_PPC64_GOT16:
5346 case R_PPC64_GOT16_DS:
5347 case R_PPC64_GOT16_HA:
5348 case R_PPC64_GOT16_HI:
5349 case R_PPC64_GOT16_LO:
5350 case R_PPC64_GOT16_LO_DS:
5351 /* This symbol requires a global offset table entry. */
5352 sec->has_toc_reloc = 1;
5353 if (r_type == R_PPC64_GOT_TLSLD16
5354 || r_type == R_PPC64_GOT_TLSGD16
5355 || r_type == R_PPC64_GOT_TPREL16_DS
5356 || r_type == R_PPC64_GOT_DTPREL16_DS
5357 || r_type == R_PPC64_GOT16
5358 || r_type == R_PPC64_GOT16_DS)
5359 {
5360 htab->do_multi_toc = 1;
5361 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5362 }
5363
5364 if (ppc64_elf_tdata (abfd)->got == NULL
5365 && !create_got_section (abfd, info))
5366 return FALSE;
5367
5368 if (h != NULL)
5369 {
5370 struct ppc_link_hash_entry *eh;
5371 struct got_entry *ent;
5372
5373 eh = (struct ppc_link_hash_entry *) h;
5374 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
5375 if (ent->addend == rel->r_addend
5376 && ent->owner == abfd
5377 && ent->tls_type == tls_type)
5378 break;
5379 if (ent == NULL)
5380 {
5381 bfd_size_type amt = sizeof (*ent);
5382 ent = bfd_alloc (abfd, amt);
5383 if (ent == NULL)
5384 return FALSE;
5385 ent->next = eh->elf.got.glist;
5386 ent->addend = rel->r_addend;
5387 ent->owner = abfd;
5388 ent->tls_type = tls_type;
5389 ent->is_indirect = FALSE;
5390 ent->got.refcount = 0;
5391 eh->elf.got.glist = ent;
5392 }
5393 ent->got.refcount += 1;
5394 eh->tls_mask |= tls_type;
5395 }
5396 else
5397 /* This is a global offset table entry for a local symbol. */
5398 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5399 rel->r_addend, tls_type))
5400 return FALSE;
5401
5402 /* We may also need a plt entry if the symbol turns out to be
5403 an ifunc. */
5404 if (h != NULL && !info->shared && abiversion (abfd) != 1)
5405 {
5406 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5407 return FALSE;
5408 }
5409 break;
5410
5411 case R_PPC64_PLT16_HA:
5412 case R_PPC64_PLT16_HI:
5413 case R_PPC64_PLT16_LO:
5414 case R_PPC64_PLT32:
5415 case R_PPC64_PLT64:
5416 /* This symbol requires a procedure linkage table entry. We
5417 actually build the entry in adjust_dynamic_symbol,
5418 because this might be a case of linking PIC code without
5419 linking in any dynamic objects, in which case we don't
5420 need to generate a procedure linkage table after all. */
5421 if (h == NULL)
5422 {
5423 /* It does not make sense to have a procedure linkage
5424 table entry for a local symbol. */
5425 bfd_set_error (bfd_error_bad_value);
5426 return FALSE;
5427 }
5428 else
5429 {
5430 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5431 return FALSE;
5432 h->needs_plt = 1;
5433 if (h->root.root.string[0] == '.'
5434 && h->root.root.string[1] != '\0')
5435 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5436 }
5437 break;
5438
5439 /* The following relocations don't need to propagate the
5440 relocation if linking a shared object since they are
5441 section relative. */
5442 case R_PPC64_SECTOFF:
5443 case R_PPC64_SECTOFF_LO:
5444 case R_PPC64_SECTOFF_HI:
5445 case R_PPC64_SECTOFF_HA:
5446 case R_PPC64_SECTOFF_DS:
5447 case R_PPC64_SECTOFF_LO_DS:
5448 case R_PPC64_DTPREL16:
5449 case R_PPC64_DTPREL16_LO:
5450 case R_PPC64_DTPREL16_HI:
5451 case R_PPC64_DTPREL16_HA:
5452 case R_PPC64_DTPREL16_DS:
5453 case R_PPC64_DTPREL16_LO_DS:
5454 case R_PPC64_DTPREL16_HIGH:
5455 case R_PPC64_DTPREL16_HIGHA:
5456 case R_PPC64_DTPREL16_HIGHER:
5457 case R_PPC64_DTPREL16_HIGHERA:
5458 case R_PPC64_DTPREL16_HIGHEST:
5459 case R_PPC64_DTPREL16_HIGHESTA:
5460 break;
5461
5462 /* Nor do these. */
5463 case R_PPC64_REL16:
5464 case R_PPC64_REL16_LO:
5465 case R_PPC64_REL16_HI:
5466 case R_PPC64_REL16_HA:
5467 break;
5468
5469 /* Not supported as a dynamic relocation. */
5470 case R_PPC64_ADDR64_LOCAL:
5471 if (info->shared)
5472 {
5473 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
5474 ppc_howto_init ();
5475 info->callbacks->einfo (_("%P: %H: %s reloc unsupported "
5476 "in shared libraries and PIEs.\n"),
5477 abfd, sec, rel->r_offset,
5478 ppc64_elf_howto_table[r_type]->name);
5479 bfd_set_error (bfd_error_bad_value);
5480 return FALSE;
5481 }
5482 break;
5483
5484 case R_PPC64_TOC16:
5485 case R_PPC64_TOC16_DS:
5486 htab->do_multi_toc = 1;
5487 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5488 case R_PPC64_TOC16_LO:
5489 case R_PPC64_TOC16_HI:
5490 case R_PPC64_TOC16_HA:
5491 case R_PPC64_TOC16_LO_DS:
5492 sec->has_toc_reloc = 1;
5493 break;
5494
5495 /* This relocation describes the C++ object vtable hierarchy.
5496 Reconstruct it for later use during GC. */
5497 case R_PPC64_GNU_VTINHERIT:
5498 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
5499 return FALSE;
5500 break;
5501
5502 /* This relocation describes which C++ vtable entries are actually
5503 used. Record for later use during GC. */
5504 case R_PPC64_GNU_VTENTRY:
5505 BFD_ASSERT (h != NULL);
5506 if (h != NULL
5507 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
5508 return FALSE;
5509 break;
5510
5511 case R_PPC64_REL14:
5512 case R_PPC64_REL14_BRTAKEN:
5513 case R_PPC64_REL14_BRNTAKEN:
5514 {
5515 asection *dest = NULL;
5516
5517 /* Heuristic: If jumping outside our section, chances are
5518 we are going to need a stub. */
5519 if (h != NULL)
5520 {
5521 /* If the sym is weak it may be overridden later, so
5522 don't assume we know where a weak sym lives. */
5523 if (h->root.type == bfd_link_hash_defined)
5524 dest = h->root.u.def.section;
5525 }
5526 else
5527 {
5528 Elf_Internal_Sym *isym;
5529
5530 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5531 abfd, r_symndx);
5532 if (isym == NULL)
5533 return FALSE;
5534
5535 dest = bfd_section_from_elf_index (abfd, isym->st_shndx);
5536 }
5537
5538 if (dest != sec)
5539 ppc64_elf_section_data (sec)->has_14bit_branch = 1;
5540 }
5541 /* Fall through. */
5542
5543 case R_PPC64_REL24:
5544 if (h != NULL && ifunc == NULL)
5545 {
5546 /* We may need a .plt entry if the function this reloc
5547 refers to is in a shared lib. */
5548 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5549 return FALSE;
5550 h->needs_plt = 1;
5551 if (h->root.root.string[0] == '.'
5552 && h->root.root.string[1] != '\0')
5553 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5554 if (h == tga || h == dottga)
5555 sec->has_tls_reloc = 1;
5556 }
5557 break;
5558
5559 case R_PPC64_TPREL64:
5560 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
5561 if (info->shared)
5562 info->flags |= DF_STATIC_TLS;
5563 goto dotlstoc;
5564
5565 case R_PPC64_DTPMOD64:
5566 if (rel + 1 < rel_end
5567 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
5568 && rel[1].r_offset == rel->r_offset + 8)
5569 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
5570 else
5571 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
5572 goto dotlstoc;
5573
5574 case R_PPC64_DTPREL64:
5575 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
5576 if (rel != relocs
5577 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
5578 && rel[-1].r_offset == rel->r_offset - 8)
5579 /* This is the second reloc of a dtpmod, dtprel pair.
5580 Don't mark with TLS_DTPREL. */
5581 goto dodyn;
5582
5583 dotlstoc:
5584 sec->has_tls_reloc = 1;
5585 if (h != NULL)
5586 {
5587 struct ppc_link_hash_entry *eh;
5588 eh = (struct ppc_link_hash_entry *) h;
5589 eh->tls_mask |= tls_type;
5590 }
5591 else
5592 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5593 rel->r_addend, tls_type))
5594 return FALSE;
5595
5596 ppc64_sec = ppc64_elf_section_data (sec);
5597 if (ppc64_sec->sec_type != sec_toc)
5598 {
5599 bfd_size_type amt;
5600
5601 /* One extra to simplify get_tls_mask. */
5602 amt = sec->size * sizeof (unsigned) / 8 + sizeof (unsigned);
5603 ppc64_sec->u.toc.symndx = bfd_zalloc (abfd, amt);
5604 if (ppc64_sec->u.toc.symndx == NULL)
5605 return FALSE;
5606 amt = sec->size * sizeof (bfd_vma) / 8;
5607 ppc64_sec->u.toc.add = bfd_zalloc (abfd, amt);
5608 if (ppc64_sec->u.toc.add == NULL)
5609 return FALSE;
5610 BFD_ASSERT (ppc64_sec->sec_type == sec_normal);
5611 ppc64_sec->sec_type = sec_toc;
5612 }
5613 BFD_ASSERT (rel->r_offset % 8 == 0);
5614 ppc64_sec->u.toc.symndx[rel->r_offset / 8] = r_symndx;
5615 ppc64_sec->u.toc.add[rel->r_offset / 8] = rel->r_addend;
5616
5617 /* Mark the second slot of a GD or LD entry.
5618 -1 to indicate GD and -2 to indicate LD. */
5619 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
5620 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -1;
5621 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
5622 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -2;
5623 goto dodyn;
5624
5625 case R_PPC64_TPREL16:
5626 case R_PPC64_TPREL16_LO:
5627 case R_PPC64_TPREL16_HI:
5628 case R_PPC64_TPREL16_HA:
5629 case R_PPC64_TPREL16_DS:
5630 case R_PPC64_TPREL16_LO_DS:
5631 case R_PPC64_TPREL16_HIGH:
5632 case R_PPC64_TPREL16_HIGHA:
5633 case R_PPC64_TPREL16_HIGHER:
5634 case R_PPC64_TPREL16_HIGHERA:
5635 case R_PPC64_TPREL16_HIGHEST:
5636 case R_PPC64_TPREL16_HIGHESTA:
5637 if (info->shared)
5638 {
5639 info->flags |= DF_STATIC_TLS;
5640 goto dodyn;
5641 }
5642 break;
5643
5644 case R_PPC64_ADDR64:
5645 if (opd_sym_map != NULL
5646 && rel + 1 < rel_end
5647 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
5648 {
5649 if (h != NULL)
5650 {
5651 if (h->root.root.string[0] == '.'
5652 && h->root.root.string[1] != 0
5653 && lookup_fdh ((struct ppc_link_hash_entry *) h, htab))
5654 ;
5655 else
5656 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5657 }
5658 else
5659 {
5660 asection *s;
5661 Elf_Internal_Sym *isym;
5662
5663 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5664 abfd, r_symndx);
5665 if (isym == NULL)
5666 return FALSE;
5667
5668 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5669 if (s != NULL && s != sec)
5670 opd_sym_map[rel->r_offset / 8] = s;
5671 }
5672 }
5673 /* Fall through. */
5674
5675 case R_PPC64_ADDR16:
5676 case R_PPC64_ADDR16_DS:
5677 case R_PPC64_ADDR16_HA:
5678 case R_PPC64_ADDR16_HI:
5679 case R_PPC64_ADDR16_HIGH:
5680 case R_PPC64_ADDR16_HIGHA:
5681 case R_PPC64_ADDR16_HIGHER:
5682 case R_PPC64_ADDR16_HIGHERA:
5683 case R_PPC64_ADDR16_HIGHEST:
5684 case R_PPC64_ADDR16_HIGHESTA:
5685 case R_PPC64_ADDR16_LO:
5686 case R_PPC64_ADDR16_LO_DS:
5687 if (h != NULL && !info->shared && abiversion (abfd) != 1
5688 && rel->r_addend == 0)
5689 {
5690 /* We may need a .plt entry if this reloc refers to a
5691 function in a shared lib. */
5692 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5693 return FALSE;
5694 h->pointer_equality_needed = 1;
5695 }
5696 /* Fall through. */
5697
5698 case R_PPC64_REL30:
5699 case R_PPC64_REL32:
5700 case R_PPC64_REL64:
5701 case R_PPC64_ADDR14:
5702 case R_PPC64_ADDR14_BRNTAKEN:
5703 case R_PPC64_ADDR14_BRTAKEN:
5704 case R_PPC64_ADDR24:
5705 case R_PPC64_ADDR32:
5706 case R_PPC64_UADDR16:
5707 case R_PPC64_UADDR32:
5708 case R_PPC64_UADDR64:
5709 case R_PPC64_TOC:
5710 if (h != NULL && !info->shared)
5711 /* We may need a copy reloc. */
5712 h->non_got_ref = 1;
5713
5714 /* Don't propagate .opd relocs. */
5715 if (NO_OPD_RELOCS && opd_sym_map != NULL)
5716 break;
5717
5718 /* If we are creating a shared library, and this is a reloc
5719 against a global symbol, or a non PC relative reloc
5720 against a local symbol, then we need to copy the reloc
5721 into the shared library. However, if we are linking with
5722 -Bsymbolic, we do not need to copy a reloc against a
5723 global symbol which is defined in an object we are
5724 including in the link (i.e., DEF_REGULAR is set). At
5725 this point we have not seen all the input files, so it is
5726 possible that DEF_REGULAR is not set now but will be set
5727 later (it is never cleared). In case of a weak definition,
5728 DEF_REGULAR may be cleared later by a strong definition in
5729 a shared library. We account for that possibility below by
5730 storing information in the dyn_relocs field of the hash
5731 table entry. A similar situation occurs when creating
5732 shared libraries and symbol visibility changes render the
5733 symbol local.
5734
5735 If on the other hand, we are creating an executable, we
5736 may need to keep relocations for symbols satisfied by a
5737 dynamic library if we manage to avoid copy relocs for the
5738 symbol. */
5739 dodyn:
5740 if ((info->shared
5741 && (must_be_dyn_reloc (info, r_type)
5742 || (h != NULL
5743 && (!SYMBOLIC_BIND (info, h)
5744 || h->root.type == bfd_link_hash_defweak
5745 || !h->def_regular))))
5746 || (ELIMINATE_COPY_RELOCS
5747 && !info->shared
5748 && h != NULL
5749 && (h->root.type == bfd_link_hash_defweak
5750 || !h->def_regular))
5751 || (!info->shared
5752 && ifunc != NULL))
5753 {
5754 /* We must copy these reloc types into the output file.
5755 Create a reloc section in dynobj and make room for
5756 this reloc. */
5757 if (sreloc == NULL)
5758 {
5759 sreloc = _bfd_elf_make_dynamic_reloc_section
5760 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
5761
5762 if (sreloc == NULL)
5763 return FALSE;
5764 }
5765
5766 /* If this is a global symbol, we count the number of
5767 relocations we need for this symbol. */
5768 if (h != NULL)
5769 {
5770 struct elf_dyn_relocs *p;
5771 struct elf_dyn_relocs **head;
5772
5773 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
5774 p = *head;
5775 if (p == NULL || p->sec != sec)
5776 {
5777 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5778 if (p == NULL)
5779 return FALSE;
5780 p->next = *head;
5781 *head = p;
5782 p->sec = sec;
5783 p->count = 0;
5784 p->pc_count = 0;
5785 }
5786 p->count += 1;
5787 if (!must_be_dyn_reloc (info, r_type))
5788 p->pc_count += 1;
5789 }
5790 else
5791 {
5792 /* Track dynamic relocs needed for local syms too.
5793 We really need local syms available to do this
5794 easily. Oh well. */
5795 struct ppc_dyn_relocs *p;
5796 struct ppc_dyn_relocs **head;
5797 bfd_boolean is_ifunc;
5798 asection *s;
5799 void *vpp;
5800 Elf_Internal_Sym *isym;
5801
5802 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5803 abfd, r_symndx);
5804 if (isym == NULL)
5805 return FALSE;
5806
5807 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5808 if (s == NULL)
5809 s = sec;
5810
5811 vpp = &elf_section_data (s)->local_dynrel;
5812 head = (struct ppc_dyn_relocs **) vpp;
5813 is_ifunc = ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC;
5814 p = *head;
5815 if (p != NULL && p->sec == sec && p->ifunc != is_ifunc)
5816 p = p->next;
5817 if (p == NULL || p->sec != sec || p->ifunc != is_ifunc)
5818 {
5819 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5820 if (p == NULL)
5821 return FALSE;
5822 p->next = *head;
5823 *head = p;
5824 p->sec = sec;
5825 p->ifunc = is_ifunc;
5826 p->count = 0;
5827 }
5828 p->count += 1;
5829 }
5830 }
5831 break;
5832
5833 default:
5834 break;
5835 }
5836 }
5837
5838 return TRUE;
5839 }
5840
5841 /* Merge backend specific data from an object file to the output
5842 object file when linking. */
5843
5844 static bfd_boolean
5845 ppc64_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
5846 {
5847 unsigned long iflags, oflags;
5848
5849 if ((ibfd->flags & BFD_LINKER_CREATED) != 0)
5850 return TRUE;
5851
5852 if (!is_ppc64_elf (ibfd) || !is_ppc64_elf (obfd))
5853 return TRUE;
5854
5855 if (!_bfd_generic_verify_endian_match (ibfd, obfd))
5856 return FALSE;
5857
5858 iflags = elf_elfheader (ibfd)->e_flags;
5859 oflags = elf_elfheader (obfd)->e_flags;
5860
5861 if (iflags & ~EF_PPC64_ABI)
5862 {
5863 (*_bfd_error_handler)
5864 (_("%B uses unknown e_flags 0x%lx"), ibfd, iflags);
5865 bfd_set_error (bfd_error_bad_value);
5866 return FALSE;
5867 }
5868 else if (iflags != oflags && iflags != 0)
5869 {
5870 (*_bfd_error_handler)
5871 (_("%B: ABI version %ld is not compatible with ABI version %ld output"),
5872 ibfd, iflags, oflags);
5873 bfd_set_error (bfd_error_bad_value);
5874 return FALSE;
5875 }
5876
5877 /* Merge Tag_compatibility attributes and any common GNU ones. */
5878 _bfd_elf_merge_object_attributes (ibfd, obfd);
5879
5880 return TRUE;
5881 }
5882
5883 static bfd_boolean
5884 ppc64_elf_print_private_bfd_data (bfd *abfd, void *ptr)
5885 {
5886 /* Print normal ELF private data. */
5887 _bfd_elf_print_private_bfd_data (abfd, ptr);
5888
5889 if (elf_elfheader (abfd)->e_flags != 0)
5890 {
5891 FILE *file = ptr;
5892
5893 /* xgettext:c-format */
5894 fprintf (file, _("private flags = 0x%lx:"),
5895 elf_elfheader (abfd)->e_flags);
5896
5897 if ((elf_elfheader (abfd)->e_flags & EF_PPC64_ABI) != 0)
5898 fprintf (file, _(" [abiv%ld]"),
5899 elf_elfheader (abfd)->e_flags & EF_PPC64_ABI);
5900 fputc ('\n', file);
5901 }
5902
5903 return TRUE;
5904 }
5905
5906 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
5907 of the code entry point, and its section. */
5908
5909 static bfd_vma
5910 opd_entry_value (asection *opd_sec,
5911 bfd_vma offset,
5912 asection **code_sec,
5913 bfd_vma *code_off,
5914 bfd_boolean in_code_sec)
5915 {
5916 bfd *opd_bfd = opd_sec->owner;
5917 Elf_Internal_Rela *relocs;
5918 Elf_Internal_Rela *lo, *hi, *look;
5919 bfd_vma val;
5920
5921 /* No relocs implies we are linking a --just-symbols object, or looking
5922 at a final linked executable with addr2line or somesuch. */
5923 if (opd_sec->reloc_count == 0)
5924 {
5925 bfd_byte *contents = ppc64_elf_tdata (opd_bfd)->opd.contents;
5926
5927 if (contents == NULL)
5928 {
5929 if (!bfd_malloc_and_get_section (opd_bfd, opd_sec, &contents))
5930 return (bfd_vma) -1;
5931 ppc64_elf_tdata (opd_bfd)->opd.contents = contents;
5932 }
5933
5934 val = bfd_get_64 (opd_bfd, contents + offset);
5935 if (code_sec != NULL)
5936 {
5937 asection *sec, *likely = NULL;
5938
5939 if (in_code_sec)
5940 {
5941 sec = *code_sec;
5942 if (sec->vma <= val
5943 && val < sec->vma + sec->size)
5944 likely = sec;
5945 else
5946 val = -1;
5947 }
5948 else
5949 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
5950 if (sec->vma <= val
5951 && (sec->flags & SEC_LOAD) != 0
5952 && (sec->flags & SEC_ALLOC) != 0)
5953 likely = sec;
5954 if (likely != NULL)
5955 {
5956 *code_sec = likely;
5957 if (code_off != NULL)
5958 *code_off = val - likely->vma;
5959 }
5960 }
5961 return val;
5962 }
5963
5964 BFD_ASSERT (is_ppc64_elf (opd_bfd));
5965
5966 relocs = ppc64_elf_tdata (opd_bfd)->opd.relocs;
5967 if (relocs == NULL)
5968 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
5969
5970 /* Go find the opd reloc at the sym address. */
5971 lo = relocs;
5972 BFD_ASSERT (lo != NULL);
5973 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
5974 val = (bfd_vma) -1;
5975 while (lo < hi)
5976 {
5977 look = lo + (hi - lo) / 2;
5978 if (look->r_offset < offset)
5979 lo = look + 1;
5980 else if (look->r_offset > offset)
5981 hi = look;
5982 else
5983 {
5984 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (opd_bfd);
5985
5986 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
5987 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
5988 {
5989 unsigned long symndx = ELF64_R_SYM (look->r_info);
5990 asection *sec;
5991
5992 if (symndx < symtab_hdr->sh_info
5993 || elf_sym_hashes (opd_bfd) == NULL)
5994 {
5995 Elf_Internal_Sym *sym;
5996
5997 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
5998 if (sym == NULL)
5999 {
6000 size_t symcnt = symtab_hdr->sh_info;
6001 if (elf_sym_hashes (opd_bfd) == NULL)
6002 symcnt = symtab_hdr->sh_size / symtab_hdr->sh_entsize;
6003 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr, symcnt,
6004 0, NULL, NULL, NULL);
6005 if (sym == NULL)
6006 break;
6007 symtab_hdr->contents = (bfd_byte *) sym;
6008 }
6009
6010 sym += symndx;
6011 val = sym->st_value;
6012 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
6013 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
6014 }
6015 else
6016 {
6017 struct elf_link_hash_entry **sym_hashes;
6018 struct elf_link_hash_entry *rh;
6019
6020 sym_hashes = elf_sym_hashes (opd_bfd);
6021 rh = sym_hashes[symndx - symtab_hdr->sh_info];
6022 if (rh != NULL)
6023 {
6024 rh = elf_follow_link (rh);
6025 BFD_ASSERT (rh->root.type == bfd_link_hash_defined
6026 || rh->root.type == bfd_link_hash_defweak);
6027 val = rh->root.u.def.value;
6028 sec = rh->root.u.def.section;
6029 }
6030 else
6031 {
6032 /* Handle the odd case where we can be called
6033 during bfd_elf_link_add_symbols before the
6034 symbol hashes have been fully populated. */
6035 Elf_Internal_Sym *sym;
6036
6037 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr, 1,
6038 symndx, NULL, NULL, NULL);
6039 if (sym == NULL)
6040 break;
6041
6042 val = sym->st_value;
6043 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
6044 free (sym);
6045 }
6046 }
6047 val += look->r_addend;
6048 if (code_off != NULL)
6049 *code_off = val;
6050 if (code_sec != NULL)
6051 {
6052 if (in_code_sec && *code_sec != sec)
6053 return -1;
6054 else
6055 *code_sec = sec;
6056 }
6057 if (sec != NULL && sec->output_section != NULL)
6058 val += sec->output_section->vma + sec->output_offset;
6059 }
6060 break;
6061 }
6062 }
6063
6064 return val;
6065 }
6066
6067 /* If the ELF symbol SYM might be a function in SEC, return the
6068 function size and set *CODE_OFF to the function's entry point,
6069 otherwise return zero. */
6070
6071 static bfd_size_type
6072 ppc64_elf_maybe_function_sym (const asymbol *sym, asection *sec,
6073 bfd_vma *code_off)
6074 {
6075 bfd_size_type size;
6076
6077 if ((sym->flags & (BSF_SECTION_SYM | BSF_FILE | BSF_OBJECT
6078 | BSF_THREAD_LOCAL | BSF_RELC | BSF_SRELC)) != 0)
6079 return 0;
6080
6081 size = 0;
6082 if (!(sym->flags & BSF_SYNTHETIC))
6083 size = ((elf_symbol_type *) sym)->internal_elf_sym.st_size;
6084
6085 if (strcmp (sym->section->name, ".opd") == 0)
6086 {
6087 if (opd_entry_value (sym->section, sym->value,
6088 &sec, code_off, TRUE) == (bfd_vma) -1)
6089 return 0;
6090 /* An old ABI binary with dot-syms has a size of 24 on the .opd
6091 symbol. This size has nothing to do with the code size of the
6092 function, which is what we're supposed to return, but the
6093 code size isn't available without looking up the dot-sym.
6094 However, doing that would be a waste of time particularly
6095 since elf_find_function will look at the dot-sym anyway.
6096 Now, elf_find_function will keep the largest size of any
6097 function sym found at the code address of interest, so return
6098 1 here to avoid it incorrectly caching a larger function size
6099 for a small function. This does mean we return the wrong
6100 size for a new-ABI function of size 24, but all that does is
6101 disable caching for such functions. */
6102 if (size == 24)
6103 size = 1;
6104 }
6105 else
6106 {
6107 if (sym->section != sec)
6108 return 0;
6109 *code_off = sym->value;
6110 }
6111 if (size == 0)
6112 size = 1;
6113 return size;
6114 }
6115
6116 /* Return true if symbol is defined in a regular object file. */
6117
6118 static bfd_boolean
6119 is_static_defined (struct elf_link_hash_entry *h)
6120 {
6121 return ((h->root.type == bfd_link_hash_defined
6122 || h->root.type == bfd_link_hash_defweak)
6123 && h->root.u.def.section != NULL
6124 && h->root.u.def.section->output_section != NULL);
6125 }
6126
6127 /* If FDH is a function descriptor symbol, return the associated code
6128 entry symbol if it is defined. Return NULL otherwise. */
6129
6130 static struct ppc_link_hash_entry *
6131 defined_code_entry (struct ppc_link_hash_entry *fdh)
6132 {
6133 if (fdh->is_func_descriptor)
6134 {
6135 struct ppc_link_hash_entry *fh = ppc_follow_link (fdh->oh);
6136 if (fh->elf.root.type == bfd_link_hash_defined
6137 || fh->elf.root.type == bfd_link_hash_defweak)
6138 return fh;
6139 }
6140 return NULL;
6141 }
6142
6143 /* If FH is a function code entry symbol, return the associated
6144 function descriptor symbol if it is defined. Return NULL otherwise. */
6145
6146 static struct ppc_link_hash_entry *
6147 defined_func_desc (struct ppc_link_hash_entry *fh)
6148 {
6149 if (fh->oh != NULL
6150 && fh->oh->is_func_descriptor)
6151 {
6152 struct ppc_link_hash_entry *fdh = ppc_follow_link (fh->oh);
6153 if (fdh->elf.root.type == bfd_link_hash_defined
6154 || fdh->elf.root.type == bfd_link_hash_defweak)
6155 return fdh;
6156 }
6157 return NULL;
6158 }
6159
6160 /* Mark all our entry sym sections, both opd and code section. */
6161
6162 static void
6163 ppc64_elf_gc_keep (struct bfd_link_info *info)
6164 {
6165 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6166 struct bfd_sym_chain *sym;
6167
6168 if (htab == NULL)
6169 return;
6170
6171 for (sym = info->gc_sym_list; sym != NULL; sym = sym->next)
6172 {
6173 struct ppc_link_hash_entry *eh, *fh;
6174 asection *sec;
6175
6176 eh = (struct ppc_link_hash_entry *)
6177 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, TRUE);
6178 if (eh == NULL)
6179 continue;
6180 if (eh->elf.root.type != bfd_link_hash_defined
6181 && eh->elf.root.type != bfd_link_hash_defweak)
6182 continue;
6183
6184 fh = defined_code_entry (eh);
6185 if (fh != NULL)
6186 {
6187 sec = fh->elf.root.u.def.section;
6188 sec->flags |= SEC_KEEP;
6189 }
6190 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6191 && opd_entry_value (eh->elf.root.u.def.section,
6192 eh->elf.root.u.def.value,
6193 &sec, NULL, FALSE) != (bfd_vma) -1)
6194 sec->flags |= SEC_KEEP;
6195
6196 sec = eh->elf.root.u.def.section;
6197 sec->flags |= SEC_KEEP;
6198 }
6199 }
6200
6201 /* Mark sections containing dynamically referenced symbols. When
6202 building shared libraries, we must assume that any visible symbol is
6203 referenced. */
6204
6205 static bfd_boolean
6206 ppc64_elf_gc_mark_dynamic_ref (struct elf_link_hash_entry *h, void *inf)
6207 {
6208 struct bfd_link_info *info = (struct bfd_link_info *) inf;
6209 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
6210 struct ppc_link_hash_entry *fdh;
6211 struct bfd_elf_dynamic_list *d = info->dynamic_list;
6212
6213 /* Dynamic linking info is on the func descriptor sym. */
6214 fdh = defined_func_desc (eh);
6215 if (fdh != NULL)
6216 eh = fdh;
6217
6218 if ((eh->elf.root.type == bfd_link_hash_defined
6219 || eh->elf.root.type == bfd_link_hash_defweak)
6220 && (eh->elf.ref_dynamic
6221 || (eh->elf.def_regular
6222 && ELF_ST_VISIBILITY (eh->elf.other) != STV_INTERNAL
6223 && ELF_ST_VISIBILITY (eh->elf.other) != STV_HIDDEN
6224 && (!info->executable
6225 || info->export_dynamic
6226 || (eh->elf.dynamic
6227 && d != NULL
6228 && (*d->match) (&d->head, NULL, eh->elf.root.root.string)))
6229 && (strchr (eh->elf.root.root.string, ELF_VER_CHR) != NULL
6230 || !bfd_hide_sym_by_version (info->version_info,
6231 eh->elf.root.root.string)))))
6232 {
6233 asection *code_sec;
6234 struct ppc_link_hash_entry *fh;
6235
6236 eh->elf.root.u.def.section->flags |= SEC_KEEP;
6237
6238 /* Function descriptor syms cause the associated
6239 function code sym section to be marked. */
6240 fh = defined_code_entry (eh);
6241 if (fh != NULL)
6242 {
6243 code_sec = fh->elf.root.u.def.section;
6244 code_sec->flags |= SEC_KEEP;
6245 }
6246 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6247 && opd_entry_value (eh->elf.root.u.def.section,
6248 eh->elf.root.u.def.value,
6249 &code_sec, NULL, FALSE) != (bfd_vma) -1)
6250 code_sec->flags |= SEC_KEEP;
6251 }
6252
6253 return TRUE;
6254 }
6255
6256 /* Return the section that should be marked against GC for a given
6257 relocation. */
6258
6259 static asection *
6260 ppc64_elf_gc_mark_hook (asection *sec,
6261 struct bfd_link_info *info,
6262 Elf_Internal_Rela *rel,
6263 struct elf_link_hash_entry *h,
6264 Elf_Internal_Sym *sym)
6265 {
6266 asection *rsec;
6267
6268 /* Syms return NULL if we're marking .opd, so we avoid marking all
6269 function sections, as all functions are referenced in .opd. */
6270 rsec = NULL;
6271 if (get_opd_info (sec) != NULL)
6272 return rsec;
6273
6274 if (h != NULL)
6275 {
6276 enum elf_ppc64_reloc_type r_type;
6277 struct ppc_link_hash_entry *eh, *fh, *fdh;
6278
6279 r_type = ELF64_R_TYPE (rel->r_info);
6280 switch (r_type)
6281 {
6282 case R_PPC64_GNU_VTINHERIT:
6283 case R_PPC64_GNU_VTENTRY:
6284 break;
6285
6286 default:
6287 switch (h->root.type)
6288 {
6289 case bfd_link_hash_defined:
6290 case bfd_link_hash_defweak:
6291 eh = (struct ppc_link_hash_entry *) h;
6292 fdh = defined_func_desc (eh);
6293 if (fdh != NULL)
6294 eh = fdh;
6295
6296 /* Function descriptor syms cause the associated
6297 function code sym section to be marked. */
6298 fh = defined_code_entry (eh);
6299 if (fh != NULL)
6300 {
6301 /* They also mark their opd section. */
6302 eh->elf.root.u.def.section->gc_mark = 1;
6303
6304 rsec = fh->elf.root.u.def.section;
6305 }
6306 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6307 && opd_entry_value (eh->elf.root.u.def.section,
6308 eh->elf.root.u.def.value,
6309 &rsec, NULL, FALSE) != (bfd_vma) -1)
6310 eh->elf.root.u.def.section->gc_mark = 1;
6311 else
6312 rsec = h->root.u.def.section;
6313 break;
6314
6315 case bfd_link_hash_common:
6316 rsec = h->root.u.c.p->section;
6317 break;
6318
6319 default:
6320 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
6321 }
6322 }
6323 }
6324 else
6325 {
6326 struct _opd_sec_data *opd;
6327
6328 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
6329 opd = get_opd_info (rsec);
6330 if (opd != NULL && opd->func_sec != NULL)
6331 {
6332 rsec->gc_mark = 1;
6333
6334 rsec = opd->func_sec[(sym->st_value + rel->r_addend) / 8];
6335 }
6336 }
6337
6338 return rsec;
6339 }
6340
6341 /* Update the .got, .plt. and dynamic reloc reference counts for the
6342 section being removed. */
6343
6344 static bfd_boolean
6345 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
6346 asection *sec, const Elf_Internal_Rela *relocs)
6347 {
6348 struct ppc_link_hash_table *htab;
6349 Elf_Internal_Shdr *symtab_hdr;
6350 struct elf_link_hash_entry **sym_hashes;
6351 struct got_entry **local_got_ents;
6352 const Elf_Internal_Rela *rel, *relend;
6353
6354 if (info->relocatable)
6355 return TRUE;
6356
6357 if ((sec->flags & SEC_ALLOC) == 0)
6358 return TRUE;
6359
6360 elf_section_data (sec)->local_dynrel = NULL;
6361
6362 htab = ppc_hash_table (info);
6363 if (htab == NULL)
6364 return FALSE;
6365
6366 symtab_hdr = &elf_symtab_hdr (abfd);
6367 sym_hashes = elf_sym_hashes (abfd);
6368 local_got_ents = elf_local_got_ents (abfd);
6369
6370 relend = relocs + sec->reloc_count;
6371 for (rel = relocs; rel < relend; rel++)
6372 {
6373 unsigned long r_symndx;
6374 enum elf_ppc64_reloc_type r_type;
6375 struct elf_link_hash_entry *h = NULL;
6376 unsigned char tls_type = 0;
6377
6378 r_symndx = ELF64_R_SYM (rel->r_info);
6379 r_type = ELF64_R_TYPE (rel->r_info);
6380 if (r_symndx >= symtab_hdr->sh_info)
6381 {
6382 struct ppc_link_hash_entry *eh;
6383 struct elf_dyn_relocs **pp;
6384 struct elf_dyn_relocs *p;
6385
6386 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
6387 h = elf_follow_link (h);
6388 eh = (struct ppc_link_hash_entry *) h;
6389
6390 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
6391 if (p->sec == sec)
6392 {
6393 /* Everything must go for SEC. */
6394 *pp = p->next;
6395 break;
6396 }
6397 }
6398
6399 if (is_branch_reloc (r_type))
6400 {
6401 struct plt_entry **ifunc = NULL;
6402 if (h != NULL)
6403 {
6404 if (h->type == STT_GNU_IFUNC)
6405 ifunc = &h->plt.plist;
6406 }
6407 else if (local_got_ents != NULL)
6408 {
6409 struct plt_entry **local_plt = (struct plt_entry **)
6410 (local_got_ents + symtab_hdr->sh_info);
6411 unsigned char *local_got_tls_masks = (unsigned char *)
6412 (local_plt + symtab_hdr->sh_info);
6413 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
6414 ifunc = local_plt + r_symndx;
6415 }
6416 if (ifunc != NULL)
6417 {
6418 struct plt_entry *ent;
6419
6420 for (ent = *ifunc; ent != NULL; ent = ent->next)
6421 if (ent->addend == rel->r_addend)
6422 break;
6423 if (ent == NULL)
6424 abort ();
6425 if (ent->plt.refcount > 0)
6426 ent->plt.refcount -= 1;
6427 continue;
6428 }
6429 }
6430
6431 switch (r_type)
6432 {
6433 case R_PPC64_GOT_TLSLD16:
6434 case R_PPC64_GOT_TLSLD16_LO:
6435 case R_PPC64_GOT_TLSLD16_HI:
6436 case R_PPC64_GOT_TLSLD16_HA:
6437 tls_type = TLS_TLS | TLS_LD;
6438 goto dogot;
6439
6440 case R_PPC64_GOT_TLSGD16:
6441 case R_PPC64_GOT_TLSGD16_LO:
6442 case R_PPC64_GOT_TLSGD16_HI:
6443 case R_PPC64_GOT_TLSGD16_HA:
6444 tls_type = TLS_TLS | TLS_GD;
6445 goto dogot;
6446
6447 case R_PPC64_GOT_TPREL16_DS:
6448 case R_PPC64_GOT_TPREL16_LO_DS:
6449 case R_PPC64_GOT_TPREL16_HI:
6450 case R_PPC64_GOT_TPREL16_HA:
6451 tls_type = TLS_TLS | TLS_TPREL;
6452 goto dogot;
6453
6454 case R_PPC64_GOT_DTPREL16_DS:
6455 case R_PPC64_GOT_DTPREL16_LO_DS:
6456 case R_PPC64_GOT_DTPREL16_HI:
6457 case R_PPC64_GOT_DTPREL16_HA:
6458 tls_type = TLS_TLS | TLS_DTPREL;
6459 goto dogot;
6460
6461 case R_PPC64_GOT16:
6462 case R_PPC64_GOT16_DS:
6463 case R_PPC64_GOT16_HA:
6464 case R_PPC64_GOT16_HI:
6465 case R_PPC64_GOT16_LO:
6466 case R_PPC64_GOT16_LO_DS:
6467 dogot:
6468 {
6469 struct got_entry *ent;
6470
6471 if (h != NULL)
6472 ent = h->got.glist;
6473 else
6474 ent = local_got_ents[r_symndx];
6475
6476 for (; ent != NULL; ent = ent->next)
6477 if (ent->addend == rel->r_addend
6478 && ent->owner == abfd
6479 && ent->tls_type == tls_type)
6480 break;
6481 if (ent == NULL)
6482 abort ();
6483 if (ent->got.refcount > 0)
6484 ent->got.refcount -= 1;
6485 }
6486 break;
6487
6488 case R_PPC64_PLT16_HA:
6489 case R_PPC64_PLT16_HI:
6490 case R_PPC64_PLT16_LO:
6491 case R_PPC64_PLT32:
6492 case R_PPC64_PLT64:
6493 case R_PPC64_REL14:
6494 case R_PPC64_REL14_BRNTAKEN:
6495 case R_PPC64_REL14_BRTAKEN:
6496 case R_PPC64_REL24:
6497 if (h != NULL)
6498 {
6499 struct plt_entry *ent;
6500
6501 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6502 if (ent->addend == rel->r_addend)
6503 break;
6504 if (ent != NULL && ent->plt.refcount > 0)
6505 ent->plt.refcount -= 1;
6506 }
6507 break;
6508
6509 default:
6510 break;
6511 }
6512 }
6513 return TRUE;
6514 }
6515
6516 /* The maximum size of .sfpr. */
6517 #define SFPR_MAX (218*4)
6518
6519 struct sfpr_def_parms
6520 {
6521 const char name[12];
6522 unsigned char lo, hi;
6523 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
6524 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
6525 };
6526
6527 /* Auto-generate _save*, _rest* functions in .sfpr. */
6528
6529 static bfd_boolean
6530 sfpr_define (struct bfd_link_info *info, const struct sfpr_def_parms *parm)
6531 {
6532 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6533 unsigned int i;
6534 size_t len = strlen (parm->name);
6535 bfd_boolean writing = FALSE;
6536 char sym[16];
6537
6538 if (htab == NULL)
6539 return FALSE;
6540
6541 memcpy (sym, parm->name, len);
6542 sym[len + 2] = 0;
6543
6544 for (i = parm->lo; i <= parm->hi; i++)
6545 {
6546 struct elf_link_hash_entry *h;
6547
6548 sym[len + 0] = i / 10 + '0';
6549 sym[len + 1] = i % 10 + '0';
6550 h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
6551 if (h != NULL
6552 && !h->def_regular)
6553 {
6554 h->root.type = bfd_link_hash_defined;
6555 h->root.u.def.section = htab->sfpr;
6556 h->root.u.def.value = htab->sfpr->size;
6557 h->type = STT_FUNC;
6558 h->def_regular = 1;
6559 _bfd_elf_link_hash_hide_symbol (info, h, TRUE);
6560 writing = TRUE;
6561 if (htab->sfpr->contents == NULL)
6562 {
6563 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
6564 if (htab->sfpr->contents == NULL)
6565 return FALSE;
6566 }
6567 }
6568 if (writing)
6569 {
6570 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
6571 if (i != parm->hi)
6572 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
6573 else
6574 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
6575 htab->sfpr->size = p - htab->sfpr->contents;
6576 }
6577 }
6578
6579 return TRUE;
6580 }
6581
6582 static bfd_byte *
6583 savegpr0 (bfd *abfd, bfd_byte *p, int r)
6584 {
6585 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6586 return p + 4;
6587 }
6588
6589 static bfd_byte *
6590 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
6591 {
6592 p = savegpr0 (abfd, p, r);
6593 bfd_put_32 (abfd, STD_R0_0R1 + STK_LR, p);
6594 p = p + 4;
6595 bfd_put_32 (abfd, BLR, p);
6596 return p + 4;
6597 }
6598
6599 static bfd_byte *
6600 restgpr0 (bfd *abfd, bfd_byte *p, int r)
6601 {
6602 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6603 return p + 4;
6604 }
6605
6606 static bfd_byte *
6607 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
6608 {
6609 bfd_put_32 (abfd, LD_R0_0R1 + STK_LR, p);
6610 p = p + 4;
6611 p = restgpr0 (abfd, p, r);
6612 bfd_put_32 (abfd, MTLR_R0, p);
6613 p = p + 4;
6614 if (r == 29)
6615 {
6616 p = restgpr0 (abfd, p, 30);
6617 p = restgpr0 (abfd, p, 31);
6618 }
6619 bfd_put_32 (abfd, BLR, p);
6620 return p + 4;
6621 }
6622
6623 static bfd_byte *
6624 savegpr1 (bfd *abfd, bfd_byte *p, int r)
6625 {
6626 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6627 return p + 4;
6628 }
6629
6630 static bfd_byte *
6631 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
6632 {
6633 p = savegpr1 (abfd, p, r);
6634 bfd_put_32 (abfd, BLR, p);
6635 return p + 4;
6636 }
6637
6638 static bfd_byte *
6639 restgpr1 (bfd *abfd, bfd_byte *p, int r)
6640 {
6641 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6642 return p + 4;
6643 }
6644
6645 static bfd_byte *
6646 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
6647 {
6648 p = restgpr1 (abfd, p, r);
6649 bfd_put_32 (abfd, BLR, p);
6650 return p + 4;
6651 }
6652
6653 static bfd_byte *
6654 savefpr (bfd *abfd, bfd_byte *p, int r)
6655 {
6656 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6657 return p + 4;
6658 }
6659
6660 static bfd_byte *
6661 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
6662 {
6663 p = savefpr (abfd, p, r);
6664 bfd_put_32 (abfd, STD_R0_0R1 + STK_LR, p);
6665 p = p + 4;
6666 bfd_put_32 (abfd, BLR, p);
6667 return p + 4;
6668 }
6669
6670 static bfd_byte *
6671 restfpr (bfd *abfd, bfd_byte *p, int r)
6672 {
6673 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6674 return p + 4;
6675 }
6676
6677 static bfd_byte *
6678 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
6679 {
6680 bfd_put_32 (abfd, LD_R0_0R1 + STK_LR, p);
6681 p = p + 4;
6682 p = restfpr (abfd, p, r);
6683 bfd_put_32 (abfd, MTLR_R0, p);
6684 p = p + 4;
6685 if (r == 29)
6686 {
6687 p = restfpr (abfd, p, 30);
6688 p = restfpr (abfd, p, 31);
6689 }
6690 bfd_put_32 (abfd, BLR, p);
6691 return p + 4;
6692 }
6693
6694 static bfd_byte *
6695 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
6696 {
6697 p = savefpr (abfd, p, r);
6698 bfd_put_32 (abfd, BLR, p);
6699 return p + 4;
6700 }
6701
6702 static bfd_byte *
6703 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
6704 {
6705 p = restfpr (abfd, p, r);
6706 bfd_put_32 (abfd, BLR, p);
6707 return p + 4;
6708 }
6709
6710 static bfd_byte *
6711 savevr (bfd *abfd, bfd_byte *p, int r)
6712 {
6713 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6714 p = p + 4;
6715 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
6716 return p + 4;
6717 }
6718
6719 static bfd_byte *
6720 savevr_tail (bfd *abfd, bfd_byte *p, int r)
6721 {
6722 p = savevr (abfd, p, r);
6723 bfd_put_32 (abfd, BLR, p);
6724 return p + 4;
6725 }
6726
6727 static bfd_byte *
6728 restvr (bfd *abfd, bfd_byte *p, int r)
6729 {
6730 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6731 p = p + 4;
6732 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
6733 return p + 4;
6734 }
6735
6736 static bfd_byte *
6737 restvr_tail (bfd *abfd, bfd_byte *p, int r)
6738 {
6739 p = restvr (abfd, p, r);
6740 bfd_put_32 (abfd, BLR, p);
6741 return p + 4;
6742 }
6743
6744 /* Called via elf_link_hash_traverse to transfer dynamic linking
6745 information on function code symbol entries to their corresponding
6746 function descriptor symbol entries. */
6747
6748 static bfd_boolean
6749 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
6750 {
6751 struct bfd_link_info *info;
6752 struct ppc_link_hash_table *htab;
6753 struct plt_entry *ent;
6754 struct ppc_link_hash_entry *fh;
6755 struct ppc_link_hash_entry *fdh;
6756 bfd_boolean force_local;
6757
6758 fh = (struct ppc_link_hash_entry *) h;
6759 if (fh->elf.root.type == bfd_link_hash_indirect)
6760 return TRUE;
6761
6762 info = inf;
6763 htab = ppc_hash_table (info);
6764 if (htab == NULL)
6765 return FALSE;
6766
6767 /* Resolve undefined references to dot-symbols as the value
6768 in the function descriptor, if we have one in a regular object.
6769 This is to satisfy cases like ".quad .foo". Calls to functions
6770 in dynamic objects are handled elsewhere. */
6771 if (fh->elf.root.type == bfd_link_hash_undefweak
6772 && fh->was_undefined
6773 && (fdh = defined_func_desc (fh)) != NULL
6774 && get_opd_info (fdh->elf.root.u.def.section) != NULL
6775 && opd_entry_value (fdh->elf.root.u.def.section,
6776 fdh->elf.root.u.def.value,
6777 &fh->elf.root.u.def.section,
6778 &fh->elf.root.u.def.value, FALSE) != (bfd_vma) -1)
6779 {
6780 fh->elf.root.type = fdh->elf.root.type;
6781 fh->elf.forced_local = 1;
6782 fh->elf.def_regular = fdh->elf.def_regular;
6783 fh->elf.def_dynamic = fdh->elf.def_dynamic;
6784 }
6785
6786 /* If this is a function code symbol, transfer dynamic linking
6787 information to the function descriptor symbol. */
6788 if (!fh->is_func)
6789 return TRUE;
6790
6791 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
6792 if (ent->plt.refcount > 0)
6793 break;
6794 if (ent == NULL
6795 || fh->elf.root.root.string[0] != '.'
6796 || fh->elf.root.root.string[1] == '\0')
6797 return TRUE;
6798
6799 /* Find the corresponding function descriptor symbol. Create it
6800 as undefined if necessary. */
6801
6802 fdh = lookup_fdh (fh, htab);
6803 if (fdh == NULL
6804 && !info->executable
6805 && (fh->elf.root.type == bfd_link_hash_undefined
6806 || fh->elf.root.type == bfd_link_hash_undefweak))
6807 {
6808 fdh = make_fdh (info, fh);
6809 if (fdh == NULL)
6810 return FALSE;
6811 }
6812
6813 /* Fake function descriptors are made undefweak. If the function
6814 code symbol is strong undefined, make the fake sym the same.
6815 If the function code symbol is defined, then force the fake
6816 descriptor local; We can't support overriding of symbols in a
6817 shared library on a fake descriptor. */
6818
6819 if (fdh != NULL
6820 && fdh->fake
6821 && fdh->elf.root.type == bfd_link_hash_undefweak)
6822 {
6823 if (fh->elf.root.type == bfd_link_hash_undefined)
6824 {
6825 fdh->elf.root.type = bfd_link_hash_undefined;
6826 bfd_link_add_undef (&htab->elf.root, &fdh->elf.root);
6827 }
6828 else if (fh->elf.root.type == bfd_link_hash_defined
6829 || fh->elf.root.type == bfd_link_hash_defweak)
6830 {
6831 _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE);
6832 }
6833 }
6834
6835 if (fdh != NULL
6836 && !fdh->elf.forced_local
6837 && (!info->executable
6838 || fdh->elf.def_dynamic
6839 || fdh->elf.ref_dynamic
6840 || (fdh->elf.root.type == bfd_link_hash_undefweak
6841 && ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT)))
6842 {
6843 if (fdh->elf.dynindx == -1)
6844 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
6845 return FALSE;
6846 fdh->elf.ref_regular |= fh->elf.ref_regular;
6847 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
6848 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
6849 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
6850 if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT)
6851 {
6852 move_plt_plist (fh, fdh);
6853 fdh->elf.needs_plt = 1;
6854 }
6855 fdh->is_func_descriptor = 1;
6856 fdh->oh = fh;
6857 fh->oh = fdh;
6858 }
6859
6860 /* Now that the info is on the function descriptor, clear the
6861 function code sym info. Any function code syms for which we
6862 don't have a definition in a regular file, we force local.
6863 This prevents a shared library from exporting syms that have
6864 been imported from another library. Function code syms that
6865 are really in the library we must leave global to prevent the
6866 linker dragging in a definition from a static library. */
6867 force_local = (!fh->elf.def_regular
6868 || fdh == NULL
6869 || !fdh->elf.def_regular
6870 || fdh->elf.forced_local);
6871 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
6872
6873 return TRUE;
6874 }
6875
6876 /* Called near the start of bfd_elf_size_dynamic_sections. We use
6877 this hook to a) provide some gcc support functions, and b) transfer
6878 dynamic linking information gathered so far on function code symbol
6879 entries, to their corresponding function descriptor symbol entries. */
6880
6881 static bfd_boolean
6882 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
6883 struct bfd_link_info *info)
6884 {
6885 struct ppc_link_hash_table *htab;
6886 unsigned int i;
6887 static const struct sfpr_def_parms funcs[] =
6888 {
6889 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
6890 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
6891 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
6892 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
6893 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
6894 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
6895 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
6896 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
6897 { "._savef", 14, 31, savefpr, savefpr1_tail },
6898 { "._restf", 14, 31, restfpr, restfpr1_tail },
6899 { "_savevr_", 20, 31, savevr, savevr_tail },
6900 { "_restvr_", 20, 31, restvr, restvr_tail }
6901 };
6902
6903 htab = ppc_hash_table (info);
6904 if (htab == NULL)
6905 return FALSE;
6906
6907 if (!info->relocatable
6908 && htab->elf.hgot != NULL)
6909 {
6910 _bfd_elf_link_hash_hide_symbol (info, htab->elf.hgot, TRUE);
6911 /* Make .TOC. defined so as to prevent it being made dynamic.
6912 The wrong value here is fixed later in ppc64_elf_set_toc. */
6913 htab->elf.hgot->type = STT_OBJECT;
6914 htab->elf.hgot->root.type = bfd_link_hash_defined;
6915 htab->elf.hgot->root.u.def.value = 0;
6916 htab->elf.hgot->root.u.def.section = bfd_abs_section_ptr;
6917 htab->elf.hgot->def_regular = 1;
6918 htab->elf.hgot->other = ((htab->elf.hgot->other & ~ELF_ST_VISIBILITY (-1))
6919 | STV_HIDDEN);
6920 }
6921
6922 if (htab->sfpr == NULL)
6923 /* We don't have any relocs. */
6924 return TRUE;
6925
6926 /* Provide any missing _save* and _rest* functions. */
6927 htab->sfpr->size = 0;
6928 if (htab->params->save_restore_funcs)
6929 for (i = 0; i < sizeof (funcs) / sizeof (funcs[0]); i++)
6930 if (!sfpr_define (info, &funcs[i]))
6931 return FALSE;
6932
6933 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
6934
6935 if (htab->sfpr->size == 0)
6936 htab->sfpr->flags |= SEC_EXCLUDE;
6937
6938 return TRUE;
6939 }
6940
6941 /* Return true if we have dynamic relocs that apply to read-only sections. */
6942
6943 static bfd_boolean
6944 readonly_dynrelocs (struct elf_link_hash_entry *h)
6945 {
6946 struct ppc_link_hash_entry *eh;
6947 struct elf_dyn_relocs *p;
6948
6949 eh = (struct ppc_link_hash_entry *) h;
6950 for (p = eh->dyn_relocs; p != NULL; p = p->next)
6951 {
6952 asection *s = p->sec->output_section;
6953
6954 if (s != NULL && (s->flags & SEC_READONLY) != 0)
6955 return TRUE;
6956 }
6957 return FALSE;
6958 }
6959
6960 /* Adjust a symbol defined by a dynamic object and referenced by a
6961 regular object. The current definition is in some section of the
6962 dynamic object, but we're not including those sections. We have to
6963 change the definition to something the rest of the link can
6964 understand. */
6965
6966 static bfd_boolean
6967 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
6968 struct elf_link_hash_entry *h)
6969 {
6970 struct ppc_link_hash_table *htab;
6971 asection *s;
6972
6973 htab = ppc_hash_table (info);
6974 if (htab == NULL)
6975 return FALSE;
6976
6977 /* Deal with function syms. */
6978 if (h->type == STT_FUNC
6979 || h->type == STT_GNU_IFUNC
6980 || h->needs_plt)
6981 {
6982 /* Clear procedure linkage table information for any symbol that
6983 won't need a .plt entry. */
6984 struct plt_entry *ent;
6985 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6986 if (ent->plt.refcount > 0)
6987 break;
6988 if (ent == NULL
6989 || (h->type != STT_GNU_IFUNC
6990 && (SYMBOL_CALLS_LOCAL (info, h)
6991 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
6992 && h->root.type == bfd_link_hash_undefweak))))
6993 {
6994 h->plt.plist = NULL;
6995 h->needs_plt = 0;
6996 h->pointer_equality_needed = 0;
6997 }
6998 else if (abiversion (info->output_bfd) == 2)
6999 {
7000 /* Taking a function's address in a read/write section
7001 doesn't require us to define the function symbol in the
7002 executable on a global entry stub. A dynamic reloc can
7003 be used instead. */
7004 if (h->pointer_equality_needed
7005 && h->type != STT_GNU_IFUNC
7006 && !readonly_dynrelocs (h))
7007 {
7008 h->pointer_equality_needed = 0;
7009 h->non_got_ref = 0;
7010 }
7011
7012 /* After adjust_dynamic_symbol, non_got_ref set in the
7013 non-shared case means that we have allocated space in
7014 .dynbss for the symbol and thus dyn_relocs for this
7015 symbol should be discarded.
7016 If we get here we know we are making a PLT entry for this
7017 symbol, and in an executable we'd normally resolve
7018 relocations against this symbol to the PLT entry. Allow
7019 dynamic relocs if the reference is weak, and the dynamic
7020 relocs will not cause text relocation. */
7021 else if (!h->ref_regular_nonweak
7022 && h->non_got_ref
7023 && h->type != STT_GNU_IFUNC
7024 && !readonly_dynrelocs (h))
7025 h->non_got_ref = 0;
7026
7027 /* If making a plt entry, then we don't need copy relocs. */
7028 return TRUE;
7029 }
7030 }
7031 else
7032 h->plt.plist = NULL;
7033
7034 /* If this is a weak symbol, and there is a real definition, the
7035 processor independent code will have arranged for us to see the
7036 real definition first, and we can just use the same value. */
7037 if (h->u.weakdef != NULL)
7038 {
7039 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
7040 || h->u.weakdef->root.type == bfd_link_hash_defweak);
7041 h->root.u.def.section = h->u.weakdef->root.u.def.section;
7042 h->root.u.def.value = h->u.weakdef->root.u.def.value;
7043 if (ELIMINATE_COPY_RELOCS)
7044 h->non_got_ref = h->u.weakdef->non_got_ref;
7045 return TRUE;
7046 }
7047
7048 /* If we are creating a shared library, we must presume that the
7049 only references to the symbol are via the global offset table.
7050 For such cases we need not do anything here; the relocations will
7051 be handled correctly by relocate_section. */
7052 if (info->shared)
7053 return TRUE;
7054
7055 /* If there are no references to this symbol that do not use the
7056 GOT, we don't need to generate a copy reloc. */
7057 if (!h->non_got_ref)
7058 return TRUE;
7059
7060 /* Don't generate a copy reloc for symbols defined in the executable. */
7061 if (!h->def_dynamic || !h->ref_regular || h->def_regular)
7062 return TRUE;
7063
7064 /* If we didn't find any dynamic relocs in read-only sections, then
7065 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
7066 if (ELIMINATE_COPY_RELOCS && !readonly_dynrelocs (h))
7067 {
7068 h->non_got_ref = 0;
7069 return TRUE;
7070 }
7071
7072 if (h->plt.plist != NULL)
7073 {
7074 /* We should never get here, but unfortunately there are versions
7075 of gcc out there that improperly (for this ABI) put initialized
7076 function pointers, vtable refs and suchlike in read-only
7077 sections. Allow them to proceed, but warn that this might
7078 break at runtime. */
7079 info->callbacks->einfo
7080 (_("%P: copy reloc against `%T' requires lazy plt linking; "
7081 "avoid setting LD_BIND_NOW=1 or upgrade gcc\n"),
7082 h->root.root.string);
7083 }
7084
7085 /* This is a reference to a symbol defined by a dynamic object which
7086 is not a function. */
7087
7088 /* We must allocate the symbol in our .dynbss section, which will
7089 become part of the .bss section of the executable. There will be
7090 an entry for this symbol in the .dynsym section. The dynamic
7091 object will contain position independent code, so all references
7092 from the dynamic object to this symbol will go through the global
7093 offset table. The dynamic linker will use the .dynsym entry to
7094 determine the address it must put in the global offset table, so
7095 both the dynamic object and the regular object will refer to the
7096 same memory location for the variable. */
7097
7098 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
7099 to copy the initial value out of the dynamic object and into the
7100 runtime process image. We need to remember the offset into the
7101 .rela.bss section we are going to use. */
7102 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
7103 {
7104 htab->relbss->size += sizeof (Elf64_External_Rela);
7105 h->needs_copy = 1;
7106 }
7107
7108 s = htab->dynbss;
7109
7110 return _bfd_elf_adjust_dynamic_copy (h, s);
7111 }
7112
7113 /* If given a function descriptor symbol, hide both the function code
7114 sym and the descriptor. */
7115 static void
7116 ppc64_elf_hide_symbol (struct bfd_link_info *info,
7117 struct elf_link_hash_entry *h,
7118 bfd_boolean force_local)
7119 {
7120 struct ppc_link_hash_entry *eh;
7121 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
7122
7123 eh = (struct ppc_link_hash_entry *) h;
7124 if (eh->is_func_descriptor)
7125 {
7126 struct ppc_link_hash_entry *fh = eh->oh;
7127
7128 if (fh == NULL)
7129 {
7130 const char *p, *q;
7131 struct ppc_link_hash_table *htab;
7132 char save;
7133
7134 /* We aren't supposed to use alloca in BFD because on
7135 systems which do not have alloca the version in libiberty
7136 calls xmalloc, which might cause the program to crash
7137 when it runs out of memory. This function doesn't have a
7138 return status, so there's no way to gracefully return an
7139 error. So cheat. We know that string[-1] can be safely
7140 accessed; It's either a string in an ELF string table,
7141 or allocated in an objalloc structure. */
7142
7143 p = eh->elf.root.root.string - 1;
7144 save = *p;
7145 *(char *) p = '.';
7146 htab = ppc_hash_table (info);
7147 if (htab == NULL)
7148 return;
7149
7150 fh = (struct ppc_link_hash_entry *)
7151 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
7152 *(char *) p = save;
7153
7154 /* Unfortunately, if it so happens that the string we were
7155 looking for was allocated immediately before this string,
7156 then we overwrote the string terminator. That's the only
7157 reason the lookup should fail. */
7158 if (fh == NULL)
7159 {
7160 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
7161 while (q >= eh->elf.root.root.string && *q == *p)
7162 --q, --p;
7163 if (q < eh->elf.root.root.string && *p == '.')
7164 fh = (struct ppc_link_hash_entry *)
7165 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
7166 }
7167 if (fh != NULL)
7168 {
7169 eh->oh = fh;
7170 fh->oh = eh;
7171 }
7172 }
7173 if (fh != NULL)
7174 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
7175 }
7176 }
7177
7178 static bfd_boolean
7179 get_sym_h (struct elf_link_hash_entry **hp,
7180 Elf_Internal_Sym **symp,
7181 asection **symsecp,
7182 unsigned char **tls_maskp,
7183 Elf_Internal_Sym **locsymsp,
7184 unsigned long r_symndx,
7185 bfd *ibfd)
7186 {
7187 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
7188
7189 if (r_symndx >= symtab_hdr->sh_info)
7190 {
7191 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
7192 struct elf_link_hash_entry *h;
7193
7194 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
7195 h = elf_follow_link (h);
7196
7197 if (hp != NULL)
7198 *hp = h;
7199
7200 if (symp != NULL)
7201 *symp = NULL;
7202
7203 if (symsecp != NULL)
7204 {
7205 asection *symsec = NULL;
7206 if (h->root.type == bfd_link_hash_defined
7207 || h->root.type == bfd_link_hash_defweak)
7208 symsec = h->root.u.def.section;
7209 *symsecp = symsec;
7210 }
7211
7212 if (tls_maskp != NULL)
7213 {
7214 struct ppc_link_hash_entry *eh;
7215
7216 eh = (struct ppc_link_hash_entry *) h;
7217 *tls_maskp = &eh->tls_mask;
7218 }
7219 }
7220 else
7221 {
7222 Elf_Internal_Sym *sym;
7223 Elf_Internal_Sym *locsyms = *locsymsp;
7224
7225 if (locsyms == NULL)
7226 {
7227 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
7228 if (locsyms == NULL)
7229 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
7230 symtab_hdr->sh_info,
7231 0, NULL, NULL, NULL);
7232 if (locsyms == NULL)
7233 return FALSE;
7234 *locsymsp = locsyms;
7235 }
7236 sym = locsyms + r_symndx;
7237
7238 if (hp != NULL)
7239 *hp = NULL;
7240
7241 if (symp != NULL)
7242 *symp = sym;
7243
7244 if (symsecp != NULL)
7245 *symsecp = bfd_section_from_elf_index (ibfd, sym->st_shndx);
7246
7247 if (tls_maskp != NULL)
7248 {
7249 struct got_entry **lgot_ents;
7250 unsigned char *tls_mask;
7251
7252 tls_mask = NULL;
7253 lgot_ents = elf_local_got_ents (ibfd);
7254 if (lgot_ents != NULL)
7255 {
7256 struct plt_entry **local_plt = (struct plt_entry **)
7257 (lgot_ents + symtab_hdr->sh_info);
7258 unsigned char *lgot_masks = (unsigned char *)
7259 (local_plt + symtab_hdr->sh_info);
7260 tls_mask = &lgot_masks[r_symndx];
7261 }
7262 *tls_maskp = tls_mask;
7263 }
7264 }
7265 return TRUE;
7266 }
7267
7268 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
7269 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
7270 type suitable for optimization, and 1 otherwise. */
7271
7272 static int
7273 get_tls_mask (unsigned char **tls_maskp,
7274 unsigned long *toc_symndx,
7275 bfd_vma *toc_addend,
7276 Elf_Internal_Sym **locsymsp,
7277 const Elf_Internal_Rela *rel,
7278 bfd *ibfd)
7279 {
7280 unsigned long r_symndx;
7281 int next_r;
7282 struct elf_link_hash_entry *h;
7283 Elf_Internal_Sym *sym;
7284 asection *sec;
7285 bfd_vma off;
7286
7287 r_symndx = ELF64_R_SYM (rel->r_info);
7288 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
7289 return 0;
7290
7291 if ((*tls_maskp != NULL && **tls_maskp != 0)
7292 || sec == NULL
7293 || ppc64_elf_section_data (sec) == NULL
7294 || ppc64_elf_section_data (sec)->sec_type != sec_toc)
7295 return 1;
7296
7297 /* Look inside a TOC section too. */
7298 if (h != NULL)
7299 {
7300 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
7301 off = h->root.u.def.value;
7302 }
7303 else
7304 off = sym->st_value;
7305 off += rel->r_addend;
7306 BFD_ASSERT (off % 8 == 0);
7307 r_symndx = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8];
7308 next_r = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8 + 1];
7309 if (toc_symndx != NULL)
7310 *toc_symndx = r_symndx;
7311 if (toc_addend != NULL)
7312 *toc_addend = ppc64_elf_section_data (sec)->u.toc.add[off / 8];
7313 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
7314 return 0;
7315 if ((h == NULL || is_static_defined (h))
7316 && (next_r == -1 || next_r == -2))
7317 return 1 - next_r;
7318 return 1;
7319 }
7320
7321 /* Find (or create) an entry in the tocsave hash table. */
7322
7323 static struct tocsave_entry *
7324 tocsave_find (struct ppc_link_hash_table *htab,
7325 enum insert_option insert,
7326 Elf_Internal_Sym **local_syms,
7327 const Elf_Internal_Rela *irela,
7328 bfd *ibfd)
7329 {
7330 unsigned long r_indx;
7331 struct elf_link_hash_entry *h;
7332 Elf_Internal_Sym *sym;
7333 struct tocsave_entry ent, *p;
7334 hashval_t hash;
7335 struct tocsave_entry **slot;
7336
7337 r_indx = ELF64_R_SYM (irela->r_info);
7338 if (!get_sym_h (&h, &sym, &ent.sec, NULL, local_syms, r_indx, ibfd))
7339 return NULL;
7340 if (ent.sec == NULL || ent.sec->output_section == NULL)
7341 {
7342 (*_bfd_error_handler)
7343 (_("%B: undefined symbol on R_PPC64_TOCSAVE relocation"));
7344 return NULL;
7345 }
7346
7347 if (h != NULL)
7348 ent.offset = h->root.u.def.value;
7349 else
7350 ent.offset = sym->st_value;
7351 ent.offset += irela->r_addend;
7352
7353 hash = tocsave_htab_hash (&ent);
7354 slot = ((struct tocsave_entry **)
7355 htab_find_slot_with_hash (htab->tocsave_htab, &ent, hash, insert));
7356 if (slot == NULL)
7357 return NULL;
7358
7359 if (*slot == NULL)
7360 {
7361 p = (struct tocsave_entry *) bfd_alloc (ibfd, sizeof (*p));
7362 if (p == NULL)
7363 return NULL;
7364 *p = ent;
7365 *slot = p;
7366 }
7367 return *slot;
7368 }
7369
7370 /* Adjust all global syms defined in opd sections. In gcc generated
7371 code for the old ABI, these will already have been done. */
7372
7373 static bfd_boolean
7374 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
7375 {
7376 struct ppc_link_hash_entry *eh;
7377 asection *sym_sec;
7378 struct _opd_sec_data *opd;
7379
7380 if (h->root.type == bfd_link_hash_indirect)
7381 return TRUE;
7382
7383 if (h->root.type != bfd_link_hash_defined
7384 && h->root.type != bfd_link_hash_defweak)
7385 return TRUE;
7386
7387 eh = (struct ppc_link_hash_entry *) h;
7388 if (eh->adjust_done)
7389 return TRUE;
7390
7391 sym_sec = eh->elf.root.u.def.section;
7392 opd = get_opd_info (sym_sec);
7393 if (opd != NULL && opd->adjust != NULL)
7394 {
7395 long adjust = opd->adjust[eh->elf.root.u.def.value / 8];
7396 if (adjust == -1)
7397 {
7398 /* This entry has been deleted. */
7399 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
7400 if (dsec == NULL)
7401 {
7402 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
7403 if (discarded_section (dsec))
7404 {
7405 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
7406 break;
7407 }
7408 }
7409 eh->elf.root.u.def.value = 0;
7410 eh->elf.root.u.def.section = dsec;
7411 }
7412 else
7413 eh->elf.root.u.def.value += adjust;
7414 eh->adjust_done = 1;
7415 }
7416 return TRUE;
7417 }
7418
7419 /* Handles decrementing dynamic reloc counts for the reloc specified by
7420 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM
7421 have already been determined. */
7422
7423 static bfd_boolean
7424 dec_dynrel_count (bfd_vma r_info,
7425 asection *sec,
7426 struct bfd_link_info *info,
7427 Elf_Internal_Sym **local_syms,
7428 struct elf_link_hash_entry *h,
7429 Elf_Internal_Sym *sym)
7430 {
7431 enum elf_ppc64_reloc_type r_type;
7432 asection *sym_sec = NULL;
7433
7434 /* Can this reloc be dynamic? This switch, and later tests here
7435 should be kept in sync with the code in check_relocs. */
7436 r_type = ELF64_R_TYPE (r_info);
7437 switch (r_type)
7438 {
7439 default:
7440 return TRUE;
7441
7442 case R_PPC64_TPREL16:
7443 case R_PPC64_TPREL16_LO:
7444 case R_PPC64_TPREL16_HI:
7445 case R_PPC64_TPREL16_HA:
7446 case R_PPC64_TPREL16_DS:
7447 case R_PPC64_TPREL16_LO_DS:
7448 case R_PPC64_TPREL16_HIGH:
7449 case R_PPC64_TPREL16_HIGHA:
7450 case R_PPC64_TPREL16_HIGHER:
7451 case R_PPC64_TPREL16_HIGHERA:
7452 case R_PPC64_TPREL16_HIGHEST:
7453 case R_PPC64_TPREL16_HIGHESTA:
7454 if (!info->shared)
7455 return TRUE;
7456
7457 case R_PPC64_TPREL64:
7458 case R_PPC64_DTPMOD64:
7459 case R_PPC64_DTPREL64:
7460 case R_PPC64_ADDR64:
7461 case R_PPC64_REL30:
7462 case R_PPC64_REL32:
7463 case R_PPC64_REL64:
7464 case R_PPC64_ADDR14:
7465 case R_PPC64_ADDR14_BRNTAKEN:
7466 case R_PPC64_ADDR14_BRTAKEN:
7467 case R_PPC64_ADDR16:
7468 case R_PPC64_ADDR16_DS:
7469 case R_PPC64_ADDR16_HA:
7470 case R_PPC64_ADDR16_HI:
7471 case R_PPC64_ADDR16_HIGH:
7472 case R_PPC64_ADDR16_HIGHA:
7473 case R_PPC64_ADDR16_HIGHER:
7474 case R_PPC64_ADDR16_HIGHERA:
7475 case R_PPC64_ADDR16_HIGHEST:
7476 case R_PPC64_ADDR16_HIGHESTA:
7477 case R_PPC64_ADDR16_LO:
7478 case R_PPC64_ADDR16_LO_DS:
7479 case R_PPC64_ADDR24:
7480 case R_PPC64_ADDR32:
7481 case R_PPC64_UADDR16:
7482 case R_PPC64_UADDR32:
7483 case R_PPC64_UADDR64:
7484 case R_PPC64_TOC:
7485 break;
7486 }
7487
7488 if (local_syms != NULL)
7489 {
7490 unsigned long r_symndx;
7491 bfd *ibfd = sec->owner;
7492
7493 r_symndx = ELF64_R_SYM (r_info);
7494 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
7495 return FALSE;
7496 }
7497
7498 if ((info->shared
7499 && (must_be_dyn_reloc (info, r_type)
7500 || (h != NULL
7501 && (!SYMBOLIC_BIND (info, h)
7502 || h->root.type == bfd_link_hash_defweak
7503 || !h->def_regular))))
7504 || (ELIMINATE_COPY_RELOCS
7505 && !info->shared
7506 && h != NULL
7507 && (h->root.type == bfd_link_hash_defweak
7508 || !h->def_regular)))
7509 ;
7510 else
7511 return TRUE;
7512
7513 if (h != NULL)
7514 {
7515 struct elf_dyn_relocs *p;
7516 struct elf_dyn_relocs **pp;
7517 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
7518
7519 /* elf_gc_sweep may have already removed all dyn relocs associated
7520 with local syms for a given section. Also, symbol flags are
7521 changed by elf_gc_sweep_symbol, confusing the test above. Don't
7522 report a dynreloc miscount. */
7523 if (*pp == NULL && info->gc_sections)
7524 return TRUE;
7525
7526 while ((p = *pp) != NULL)
7527 {
7528 if (p->sec == sec)
7529 {
7530 if (!must_be_dyn_reloc (info, r_type))
7531 p->pc_count -= 1;
7532 p->count -= 1;
7533 if (p->count == 0)
7534 *pp = p->next;
7535 return TRUE;
7536 }
7537 pp = &p->next;
7538 }
7539 }
7540 else
7541 {
7542 struct ppc_dyn_relocs *p;
7543 struct ppc_dyn_relocs **pp;
7544 void *vpp;
7545 bfd_boolean is_ifunc;
7546
7547 if (local_syms == NULL)
7548 sym_sec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
7549 if (sym_sec == NULL)
7550 sym_sec = sec;
7551
7552 vpp = &elf_section_data (sym_sec)->local_dynrel;
7553 pp = (struct ppc_dyn_relocs **) vpp;
7554
7555 if (*pp == NULL && info->gc_sections)
7556 return TRUE;
7557
7558 is_ifunc = ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC;
7559 while ((p = *pp) != NULL)
7560 {
7561 if (p->sec == sec && p->ifunc == is_ifunc)
7562 {
7563 p->count -= 1;
7564 if (p->count == 0)
7565 *pp = p->next;
7566 return TRUE;
7567 }
7568 pp = &p->next;
7569 }
7570 }
7571
7572 info->callbacks->einfo (_("%P: dynreloc miscount for %B, section %A\n"),
7573 sec->owner, sec);
7574 bfd_set_error (bfd_error_bad_value);
7575 return FALSE;
7576 }
7577
7578 /* Remove unused Official Procedure Descriptor entries. Currently we
7579 only remove those associated with functions in discarded link-once
7580 sections, or weakly defined functions that have been overridden. It
7581 would be possible to remove many more entries for statically linked
7582 applications. */
7583
7584 bfd_boolean
7585 ppc64_elf_edit_opd (struct bfd_link_info *info)
7586 {
7587 bfd *ibfd;
7588 bfd_boolean some_edited = FALSE;
7589 asection *need_pad = NULL;
7590 struct ppc_link_hash_table *htab;
7591
7592 htab = ppc_hash_table (info);
7593 if (htab == NULL)
7594 return FALSE;
7595
7596 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
7597 {
7598 asection *sec;
7599 Elf_Internal_Rela *relstart, *rel, *relend;
7600 Elf_Internal_Shdr *symtab_hdr;
7601 Elf_Internal_Sym *local_syms;
7602 bfd_vma offset;
7603 struct _opd_sec_data *opd;
7604 bfd_boolean need_edit, add_aux_fields;
7605 bfd_size_type cnt_16b = 0;
7606
7607 if (!is_ppc64_elf (ibfd))
7608 continue;
7609
7610 sec = bfd_get_section_by_name (ibfd, ".opd");
7611 if (sec == NULL || sec->size == 0)
7612 continue;
7613
7614 if (sec->sec_info_type == SEC_INFO_TYPE_JUST_SYMS)
7615 continue;
7616
7617 if (sec->output_section == bfd_abs_section_ptr)
7618 continue;
7619
7620 /* Look through the section relocs. */
7621 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
7622 continue;
7623
7624 local_syms = NULL;
7625 symtab_hdr = &elf_symtab_hdr (ibfd);
7626
7627 /* Read the relocations. */
7628 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7629 info->keep_memory);
7630 if (relstart == NULL)
7631 return FALSE;
7632
7633 /* First run through the relocs to check they are sane, and to
7634 determine whether we need to edit this opd section. */
7635 need_edit = FALSE;
7636 need_pad = sec;
7637 offset = 0;
7638 relend = relstart + sec->reloc_count;
7639 for (rel = relstart; rel < relend; )
7640 {
7641 enum elf_ppc64_reloc_type r_type;
7642 unsigned long r_symndx;
7643 asection *sym_sec;
7644 struct elf_link_hash_entry *h;
7645 Elf_Internal_Sym *sym;
7646
7647 /* .opd contains a regular array of 16 or 24 byte entries. We're
7648 only interested in the reloc pointing to a function entry
7649 point. */
7650 if (rel->r_offset != offset
7651 || rel + 1 >= relend
7652 || (rel + 1)->r_offset != offset + 8)
7653 {
7654 /* If someone messes with .opd alignment then after a
7655 "ld -r" we might have padding in the middle of .opd.
7656 Also, there's nothing to prevent someone putting
7657 something silly in .opd with the assembler. No .opd
7658 optimization for them! */
7659 broken_opd:
7660 (*_bfd_error_handler)
7661 (_("%B: .opd is not a regular array of opd entries"), ibfd);
7662 need_edit = FALSE;
7663 break;
7664 }
7665
7666 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
7667 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
7668 {
7669 (*_bfd_error_handler)
7670 (_("%B: unexpected reloc type %u in .opd section"),
7671 ibfd, r_type);
7672 need_edit = FALSE;
7673 break;
7674 }
7675
7676 r_symndx = ELF64_R_SYM (rel->r_info);
7677 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7678 r_symndx, ibfd))
7679 goto error_ret;
7680
7681 if (sym_sec == NULL || sym_sec->owner == NULL)
7682 {
7683 const char *sym_name;
7684 if (h != NULL)
7685 sym_name = h->root.root.string;
7686 else
7687 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
7688 sym_sec);
7689
7690 (*_bfd_error_handler)
7691 (_("%B: undefined sym `%s' in .opd section"),
7692 ibfd, sym_name);
7693 need_edit = FALSE;
7694 break;
7695 }
7696
7697 /* opd entries are always for functions defined in the
7698 current input bfd. If the symbol isn't defined in the
7699 input bfd, then we won't be using the function in this
7700 bfd; It must be defined in a linkonce section in another
7701 bfd, or is weak. It's also possible that we are
7702 discarding the function due to a linker script /DISCARD/,
7703 which we test for via the output_section. */
7704 if (sym_sec->owner != ibfd
7705 || sym_sec->output_section == bfd_abs_section_ptr)
7706 need_edit = TRUE;
7707
7708 rel += 2;
7709 if (rel == relend
7710 || (rel + 1 == relend && rel->r_offset == offset + 16))
7711 {
7712 if (sec->size == offset + 24)
7713 {
7714 need_pad = NULL;
7715 break;
7716 }
7717 if (rel == relend && sec->size == offset + 16)
7718 {
7719 cnt_16b++;
7720 break;
7721 }
7722 goto broken_opd;
7723 }
7724
7725 if (rel->r_offset == offset + 24)
7726 offset += 24;
7727 else if (rel->r_offset != offset + 16)
7728 goto broken_opd;
7729 else if (rel + 1 < relend
7730 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
7731 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
7732 {
7733 offset += 16;
7734 cnt_16b++;
7735 }
7736 else if (rel + 2 < relend
7737 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_ADDR64
7738 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC)
7739 {
7740 offset += 24;
7741 rel += 1;
7742 }
7743 else
7744 goto broken_opd;
7745 }
7746
7747 add_aux_fields = htab->params->non_overlapping_opd && cnt_16b > 0;
7748
7749 if (need_edit || add_aux_fields)
7750 {
7751 Elf_Internal_Rela *write_rel;
7752 Elf_Internal_Shdr *rel_hdr;
7753 bfd_byte *rptr, *wptr;
7754 bfd_byte *new_contents;
7755 bfd_boolean skip;
7756 long opd_ent_size;
7757 bfd_size_type amt;
7758
7759 new_contents = NULL;
7760 amt = sec->size * sizeof (long) / 8;
7761 opd = &ppc64_elf_section_data (sec)->u.opd;
7762 opd->adjust = bfd_zalloc (sec->owner, amt);
7763 if (opd->adjust == NULL)
7764 return FALSE;
7765 ppc64_elf_section_data (sec)->sec_type = sec_opd;
7766
7767 /* This seems a waste of time as input .opd sections are all
7768 zeros as generated by gcc, but I suppose there's no reason
7769 this will always be so. We might start putting something in
7770 the third word of .opd entries. */
7771 if ((sec->flags & SEC_IN_MEMORY) == 0)
7772 {
7773 bfd_byte *loc;
7774 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
7775 {
7776 if (loc != NULL)
7777 free (loc);
7778 error_ret:
7779 if (local_syms != NULL
7780 && symtab_hdr->contents != (unsigned char *) local_syms)
7781 free (local_syms);
7782 if (elf_section_data (sec)->relocs != relstart)
7783 free (relstart);
7784 return FALSE;
7785 }
7786 sec->contents = loc;
7787 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
7788 }
7789
7790 elf_section_data (sec)->relocs = relstart;
7791
7792 new_contents = sec->contents;
7793 if (add_aux_fields)
7794 {
7795 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
7796 if (new_contents == NULL)
7797 return FALSE;
7798 need_pad = FALSE;
7799 }
7800 wptr = new_contents;
7801 rptr = sec->contents;
7802
7803 write_rel = relstart;
7804 skip = FALSE;
7805 offset = 0;
7806 opd_ent_size = 0;
7807 for (rel = relstart; rel < relend; rel++)
7808 {
7809 unsigned long r_symndx;
7810 asection *sym_sec;
7811 struct elf_link_hash_entry *h;
7812 Elf_Internal_Sym *sym;
7813
7814 r_symndx = ELF64_R_SYM (rel->r_info);
7815 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7816 r_symndx, ibfd))
7817 goto error_ret;
7818
7819 if (rel->r_offset == offset)
7820 {
7821 struct ppc_link_hash_entry *fdh = NULL;
7822
7823 /* See if the .opd entry is full 24 byte or
7824 16 byte (with fd_aux entry overlapped with next
7825 fd_func). */
7826 opd_ent_size = 24;
7827 if ((rel + 2 == relend && sec->size == offset + 16)
7828 || (rel + 3 < relend
7829 && rel[2].r_offset == offset + 16
7830 && rel[3].r_offset == offset + 24
7831 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_ADDR64
7832 && ELF64_R_TYPE (rel[3].r_info) == R_PPC64_TOC))
7833 opd_ent_size = 16;
7834
7835 if (h != NULL
7836 && h->root.root.string[0] == '.')
7837 {
7838 fdh = lookup_fdh ((struct ppc_link_hash_entry *) h, htab);
7839 if (fdh != NULL
7840 && fdh->elf.root.type != bfd_link_hash_defined
7841 && fdh->elf.root.type != bfd_link_hash_defweak)
7842 fdh = NULL;
7843 }
7844
7845 skip = (sym_sec->owner != ibfd
7846 || sym_sec->output_section == bfd_abs_section_ptr);
7847 if (skip)
7848 {
7849 if (fdh != NULL && sym_sec->owner == ibfd)
7850 {
7851 /* Arrange for the function descriptor sym
7852 to be dropped. */
7853 fdh->elf.root.u.def.value = 0;
7854 fdh->elf.root.u.def.section = sym_sec;
7855 }
7856 opd->adjust[rel->r_offset / 8] = -1;
7857 }
7858 else
7859 {
7860 /* We'll be keeping this opd entry. */
7861
7862 if (fdh != NULL)
7863 {
7864 /* Redefine the function descriptor symbol to
7865 this location in the opd section. It is
7866 necessary to update the value here rather
7867 than using an array of adjustments as we do
7868 for local symbols, because various places
7869 in the generic ELF code use the value
7870 stored in u.def.value. */
7871 fdh->elf.root.u.def.value = wptr - new_contents;
7872 fdh->adjust_done = 1;
7873 }
7874
7875 /* Local syms are a bit tricky. We could
7876 tweak them as they can be cached, but
7877 we'd need to look through the local syms
7878 for the function descriptor sym which we
7879 don't have at the moment. So keep an
7880 array of adjustments. */
7881 opd->adjust[rel->r_offset / 8]
7882 = (wptr - new_contents) - (rptr - sec->contents);
7883
7884 if (wptr != rptr)
7885 memcpy (wptr, rptr, opd_ent_size);
7886 wptr += opd_ent_size;
7887 if (add_aux_fields && opd_ent_size == 16)
7888 {
7889 memset (wptr, '\0', 8);
7890 wptr += 8;
7891 }
7892 }
7893 rptr += opd_ent_size;
7894 offset += opd_ent_size;
7895 }
7896
7897 if (skip)
7898 {
7899 if (!NO_OPD_RELOCS
7900 && !info->relocatable
7901 && !dec_dynrel_count (rel->r_info, sec, info,
7902 NULL, h, sym))
7903 goto error_ret;
7904 }
7905 else
7906 {
7907 /* We need to adjust any reloc offsets to point to the
7908 new opd entries. While we're at it, we may as well
7909 remove redundant relocs. */
7910 rel->r_offset += opd->adjust[(offset - opd_ent_size) / 8];
7911 if (write_rel != rel)
7912 memcpy (write_rel, rel, sizeof (*rel));
7913 ++write_rel;
7914 }
7915 }
7916
7917 sec->size = wptr - new_contents;
7918 sec->reloc_count = write_rel - relstart;
7919 if (add_aux_fields)
7920 {
7921 free (sec->contents);
7922 sec->contents = new_contents;
7923 }
7924
7925 /* Fudge the header size too, as this is used later in
7926 elf_bfd_final_link if we are emitting relocs. */
7927 rel_hdr = _bfd_elf_single_rel_hdr (sec);
7928 rel_hdr->sh_size = sec->reloc_count * rel_hdr->sh_entsize;
7929 some_edited = TRUE;
7930 }
7931 else if (elf_section_data (sec)->relocs != relstart)
7932 free (relstart);
7933
7934 if (local_syms != NULL
7935 && symtab_hdr->contents != (unsigned char *) local_syms)
7936 {
7937 if (!info->keep_memory)
7938 free (local_syms);
7939 else
7940 symtab_hdr->contents = (unsigned char *) local_syms;
7941 }
7942 }
7943
7944 if (some_edited)
7945 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
7946
7947 /* If we are doing a final link and the last .opd entry is just 16 byte
7948 long, add a 8 byte padding after it. */
7949 if (need_pad != NULL && !info->relocatable)
7950 {
7951 bfd_byte *p;
7952
7953 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
7954 {
7955 BFD_ASSERT (need_pad->size > 0);
7956
7957 p = bfd_malloc (need_pad->size + 8);
7958 if (p == NULL)
7959 return FALSE;
7960
7961 if (! bfd_get_section_contents (need_pad->owner, need_pad,
7962 p, 0, need_pad->size))
7963 return FALSE;
7964
7965 need_pad->contents = p;
7966 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
7967 }
7968 else
7969 {
7970 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
7971 if (p == NULL)
7972 return FALSE;
7973
7974 need_pad->contents = p;
7975 }
7976
7977 memset (need_pad->contents + need_pad->size, 0, 8);
7978 need_pad->size += 8;
7979 }
7980
7981 return TRUE;
7982 }
7983
7984 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
7985
7986 asection *
7987 ppc64_elf_tls_setup (struct bfd_link_info *info)
7988 {
7989 struct ppc_link_hash_table *htab;
7990
7991 htab = ppc_hash_table (info);
7992 if (htab == NULL)
7993 return NULL;
7994
7995 if (abiversion (info->output_bfd) == 1)
7996 htab->opd_abi = 1;
7997
7998 if (htab->params->no_multi_toc)
7999 htab->do_multi_toc = 0;
8000 else if (!htab->do_multi_toc)
8001 htab->params->no_multi_toc = 1;
8002
8003 htab->tls_get_addr = ((struct ppc_link_hash_entry *)
8004 elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
8005 FALSE, FALSE, TRUE));
8006 /* Move dynamic linking info to the function descriptor sym. */
8007 if (htab->tls_get_addr != NULL)
8008 func_desc_adjust (&htab->tls_get_addr->elf, info);
8009 htab->tls_get_addr_fd = ((struct ppc_link_hash_entry *)
8010 elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
8011 FALSE, FALSE, TRUE));
8012 if (!htab->params->no_tls_get_addr_opt)
8013 {
8014 struct elf_link_hash_entry *opt, *opt_fd, *tga, *tga_fd;
8015
8016 opt = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr_opt",
8017 FALSE, FALSE, TRUE);
8018 if (opt != NULL)
8019 func_desc_adjust (opt, info);
8020 opt_fd = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
8021 FALSE, FALSE, TRUE);
8022 if (opt_fd != NULL
8023 && (opt_fd->root.type == bfd_link_hash_defined
8024 || opt_fd->root.type == bfd_link_hash_defweak))
8025 {
8026 /* If glibc supports an optimized __tls_get_addr call stub,
8027 signalled by the presence of __tls_get_addr_opt, and we'll
8028 be calling __tls_get_addr via a plt call stub, then
8029 make __tls_get_addr point to __tls_get_addr_opt. */
8030 tga_fd = &htab->tls_get_addr_fd->elf;
8031 if (htab->elf.dynamic_sections_created
8032 && tga_fd != NULL
8033 && (tga_fd->type == STT_FUNC
8034 || tga_fd->needs_plt)
8035 && !(SYMBOL_CALLS_LOCAL (info, tga_fd)
8036 || (ELF_ST_VISIBILITY (tga_fd->other) != STV_DEFAULT
8037 && tga_fd->root.type == bfd_link_hash_undefweak)))
8038 {
8039 struct plt_entry *ent;
8040
8041 for (ent = tga_fd->plt.plist; ent != NULL; ent = ent->next)
8042 if (ent->plt.refcount > 0)
8043 break;
8044 if (ent != NULL)
8045 {
8046 tga_fd->root.type = bfd_link_hash_indirect;
8047 tga_fd->root.u.i.link = &opt_fd->root;
8048 ppc64_elf_copy_indirect_symbol (info, opt_fd, tga_fd);
8049 if (opt_fd->dynindx != -1)
8050 {
8051 /* Use __tls_get_addr_opt in dynamic relocations. */
8052 opt_fd->dynindx = -1;
8053 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
8054 opt_fd->dynstr_index);
8055 if (!bfd_elf_link_record_dynamic_symbol (info, opt_fd))
8056 return NULL;
8057 }
8058 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) opt_fd;
8059 tga = &htab->tls_get_addr->elf;
8060 if (opt != NULL && tga != NULL)
8061 {
8062 tga->root.type = bfd_link_hash_indirect;
8063 tga->root.u.i.link = &opt->root;
8064 ppc64_elf_copy_indirect_symbol (info, opt, tga);
8065 _bfd_elf_link_hash_hide_symbol (info, opt,
8066 tga->forced_local);
8067 htab->tls_get_addr = (struct ppc_link_hash_entry *) opt;
8068 }
8069 htab->tls_get_addr_fd->oh = htab->tls_get_addr;
8070 htab->tls_get_addr_fd->is_func_descriptor = 1;
8071 if (htab->tls_get_addr != NULL)
8072 {
8073 htab->tls_get_addr->oh = htab->tls_get_addr_fd;
8074 htab->tls_get_addr->is_func = 1;
8075 }
8076 }
8077 }
8078 }
8079 else
8080 htab->params->no_tls_get_addr_opt = TRUE;
8081 }
8082 return _bfd_elf_tls_setup (info->output_bfd, info);
8083 }
8084
8085 /* Return TRUE iff REL is a branch reloc with a global symbol matching
8086 HASH1 or HASH2. */
8087
8088 static bfd_boolean
8089 branch_reloc_hash_match (const bfd *ibfd,
8090 const Elf_Internal_Rela *rel,
8091 const struct ppc_link_hash_entry *hash1,
8092 const struct ppc_link_hash_entry *hash2)
8093 {
8094 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
8095 enum elf_ppc64_reloc_type r_type = ELF64_R_TYPE (rel->r_info);
8096 unsigned int r_symndx = ELF64_R_SYM (rel->r_info);
8097
8098 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
8099 {
8100 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
8101 struct elf_link_hash_entry *h;
8102
8103 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
8104 h = elf_follow_link (h);
8105 if (h == &hash1->elf || h == &hash2->elf)
8106 return TRUE;
8107 }
8108 return FALSE;
8109 }
8110
8111 /* Run through all the TLS relocs looking for optimization
8112 opportunities. The linker has been hacked (see ppc64elf.em) to do
8113 a preliminary section layout so that we know the TLS segment
8114 offsets. We can't optimize earlier because some optimizations need
8115 to know the tp offset, and we need to optimize before allocating
8116 dynamic relocations. */
8117
8118 bfd_boolean
8119 ppc64_elf_tls_optimize (struct bfd_link_info *info)
8120 {
8121 bfd *ibfd;
8122 asection *sec;
8123 struct ppc_link_hash_table *htab;
8124 unsigned char *toc_ref;
8125 int pass;
8126
8127 if (info->relocatable || !info->executable)
8128 return TRUE;
8129
8130 htab = ppc_hash_table (info);
8131 if (htab == NULL)
8132 return FALSE;
8133
8134 /* Make two passes over the relocs. On the first pass, mark toc
8135 entries involved with tls relocs, and check that tls relocs
8136 involved in setting up a tls_get_addr call are indeed followed by
8137 such a call. If they are not, we can't do any tls optimization.
8138 On the second pass twiddle tls_mask flags to notify
8139 relocate_section that optimization can be done, and adjust got
8140 and plt refcounts. */
8141 toc_ref = NULL;
8142 for (pass = 0; pass < 2; ++pass)
8143 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
8144 {
8145 Elf_Internal_Sym *locsyms = NULL;
8146 asection *toc = bfd_get_section_by_name (ibfd, ".toc");
8147
8148 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8149 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
8150 {
8151 Elf_Internal_Rela *relstart, *rel, *relend;
8152 bfd_boolean found_tls_get_addr_arg = 0;
8153
8154 /* Read the relocations. */
8155 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8156 info->keep_memory);
8157 if (relstart == NULL)
8158 {
8159 free (toc_ref);
8160 return FALSE;
8161 }
8162
8163 relend = relstart + sec->reloc_count;
8164 for (rel = relstart; rel < relend; rel++)
8165 {
8166 enum elf_ppc64_reloc_type r_type;
8167 unsigned long r_symndx;
8168 struct elf_link_hash_entry *h;
8169 Elf_Internal_Sym *sym;
8170 asection *sym_sec;
8171 unsigned char *tls_mask;
8172 unsigned char tls_set, tls_clear, tls_type = 0;
8173 bfd_vma value;
8174 bfd_boolean ok_tprel, is_local;
8175 long toc_ref_index = 0;
8176 int expecting_tls_get_addr = 0;
8177 bfd_boolean ret = FALSE;
8178
8179 r_symndx = ELF64_R_SYM (rel->r_info);
8180 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
8181 r_symndx, ibfd))
8182 {
8183 err_free_rel:
8184 if (elf_section_data (sec)->relocs != relstart)
8185 free (relstart);
8186 if (toc_ref != NULL)
8187 free (toc_ref);
8188 if (locsyms != NULL
8189 && (elf_symtab_hdr (ibfd).contents
8190 != (unsigned char *) locsyms))
8191 free (locsyms);
8192 return ret;
8193 }
8194
8195 if (h != NULL)
8196 {
8197 if (h->root.type == bfd_link_hash_defined
8198 || h->root.type == bfd_link_hash_defweak)
8199 value = h->root.u.def.value;
8200 else if (h->root.type == bfd_link_hash_undefweak)
8201 value = 0;
8202 else
8203 {
8204 found_tls_get_addr_arg = 0;
8205 continue;
8206 }
8207 }
8208 else
8209 /* Symbols referenced by TLS relocs must be of type
8210 STT_TLS. So no need for .opd local sym adjust. */
8211 value = sym->st_value;
8212
8213 ok_tprel = FALSE;
8214 is_local = FALSE;
8215 if (h == NULL
8216 || !h->def_dynamic)
8217 {
8218 is_local = TRUE;
8219 if (h != NULL
8220 && h->root.type == bfd_link_hash_undefweak)
8221 ok_tprel = TRUE;
8222 else
8223 {
8224 value += sym_sec->output_offset;
8225 value += sym_sec->output_section->vma;
8226 value -= htab->elf.tls_sec->vma;
8227 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
8228 < (bfd_vma) 1 << 32);
8229 }
8230 }
8231
8232 r_type = ELF64_R_TYPE (rel->r_info);
8233 /* If this section has old-style __tls_get_addr calls
8234 without marker relocs, then check that each
8235 __tls_get_addr call reloc is preceded by a reloc
8236 that conceivably belongs to the __tls_get_addr arg
8237 setup insn. If we don't find matching arg setup
8238 relocs, don't do any tls optimization. */
8239 if (pass == 0
8240 && sec->has_tls_get_addr_call
8241 && h != NULL
8242 && (h == &htab->tls_get_addr->elf
8243 || h == &htab->tls_get_addr_fd->elf)
8244 && !found_tls_get_addr_arg
8245 && is_branch_reloc (r_type))
8246 {
8247 info->callbacks->minfo (_("%H __tls_get_addr lost arg, "
8248 "TLS optimization disabled\n"),
8249 ibfd, sec, rel->r_offset);
8250 ret = TRUE;
8251 goto err_free_rel;
8252 }
8253
8254 found_tls_get_addr_arg = 0;
8255 switch (r_type)
8256 {
8257 case R_PPC64_GOT_TLSLD16:
8258 case R_PPC64_GOT_TLSLD16_LO:
8259 expecting_tls_get_addr = 1;
8260 found_tls_get_addr_arg = 1;
8261 /* Fall thru */
8262
8263 case R_PPC64_GOT_TLSLD16_HI:
8264 case R_PPC64_GOT_TLSLD16_HA:
8265 /* These relocs should never be against a symbol
8266 defined in a shared lib. Leave them alone if
8267 that turns out to be the case. */
8268 if (!is_local)
8269 continue;
8270
8271 /* LD -> LE */
8272 tls_set = 0;
8273 tls_clear = TLS_LD;
8274 tls_type = TLS_TLS | TLS_LD;
8275 break;
8276
8277 case R_PPC64_GOT_TLSGD16:
8278 case R_PPC64_GOT_TLSGD16_LO:
8279 expecting_tls_get_addr = 1;
8280 found_tls_get_addr_arg = 1;
8281 /* Fall thru */
8282
8283 case R_PPC64_GOT_TLSGD16_HI:
8284 case R_PPC64_GOT_TLSGD16_HA:
8285 if (ok_tprel)
8286 /* GD -> LE */
8287 tls_set = 0;
8288 else
8289 /* GD -> IE */
8290 tls_set = TLS_TLS | TLS_TPRELGD;
8291 tls_clear = TLS_GD;
8292 tls_type = TLS_TLS | TLS_GD;
8293 break;
8294
8295 case R_PPC64_GOT_TPREL16_DS:
8296 case R_PPC64_GOT_TPREL16_LO_DS:
8297 case R_PPC64_GOT_TPREL16_HI:
8298 case R_PPC64_GOT_TPREL16_HA:
8299 if (ok_tprel)
8300 {
8301 /* IE -> LE */
8302 tls_set = 0;
8303 tls_clear = TLS_TPREL;
8304 tls_type = TLS_TLS | TLS_TPREL;
8305 break;
8306 }
8307 continue;
8308
8309 case R_PPC64_TLSGD:
8310 case R_PPC64_TLSLD:
8311 found_tls_get_addr_arg = 1;
8312 /* Fall thru */
8313
8314 case R_PPC64_TLS:
8315 case R_PPC64_TOC16:
8316 case R_PPC64_TOC16_LO:
8317 if (sym_sec == NULL || sym_sec != toc)
8318 continue;
8319
8320 /* Mark this toc entry as referenced by a TLS
8321 code sequence. We can do that now in the
8322 case of R_PPC64_TLS, and after checking for
8323 tls_get_addr for the TOC16 relocs. */
8324 if (toc_ref == NULL)
8325 toc_ref = bfd_zmalloc (toc->output_section->rawsize / 8);
8326 if (toc_ref == NULL)
8327 goto err_free_rel;
8328
8329 if (h != NULL)
8330 value = h->root.u.def.value;
8331 else
8332 value = sym->st_value;
8333 value += rel->r_addend;
8334 BFD_ASSERT (value < toc->size && value % 8 == 0);
8335 toc_ref_index = (value + toc->output_offset) / 8;
8336 if (r_type == R_PPC64_TLS
8337 || r_type == R_PPC64_TLSGD
8338 || r_type == R_PPC64_TLSLD)
8339 {
8340 toc_ref[toc_ref_index] = 1;
8341 continue;
8342 }
8343
8344 if (pass != 0 && toc_ref[toc_ref_index] == 0)
8345 continue;
8346
8347 tls_set = 0;
8348 tls_clear = 0;
8349 expecting_tls_get_addr = 2;
8350 break;
8351
8352 case R_PPC64_TPREL64:
8353 if (pass == 0
8354 || sec != toc
8355 || toc_ref == NULL
8356 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
8357 continue;
8358 if (ok_tprel)
8359 {
8360 /* IE -> LE */
8361 tls_set = TLS_EXPLICIT;
8362 tls_clear = TLS_TPREL;
8363 break;
8364 }
8365 continue;
8366
8367 case R_PPC64_DTPMOD64:
8368 if (pass == 0
8369 || sec != toc
8370 || toc_ref == NULL
8371 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
8372 continue;
8373 if (rel + 1 < relend
8374 && (rel[1].r_info
8375 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
8376 && rel[1].r_offset == rel->r_offset + 8)
8377 {
8378 if (ok_tprel)
8379 /* GD -> LE */
8380 tls_set = TLS_EXPLICIT | TLS_GD;
8381 else
8382 /* GD -> IE */
8383 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
8384 tls_clear = TLS_GD;
8385 }
8386 else
8387 {
8388 if (!is_local)
8389 continue;
8390
8391 /* LD -> LE */
8392 tls_set = TLS_EXPLICIT;
8393 tls_clear = TLS_LD;
8394 }
8395 break;
8396
8397 default:
8398 continue;
8399 }
8400
8401 if (pass == 0)
8402 {
8403 if (!expecting_tls_get_addr
8404 || !sec->has_tls_get_addr_call)
8405 continue;
8406
8407 if (rel + 1 < relend
8408 && branch_reloc_hash_match (ibfd, rel + 1,
8409 htab->tls_get_addr,
8410 htab->tls_get_addr_fd))
8411 {
8412 if (expecting_tls_get_addr == 2)
8413 {
8414 /* Check for toc tls entries. */
8415 unsigned char *toc_tls;
8416 int retval;
8417
8418 retval = get_tls_mask (&toc_tls, NULL, NULL,
8419 &locsyms,
8420 rel, ibfd);
8421 if (retval == 0)
8422 goto err_free_rel;
8423 if (toc_tls != NULL)
8424 {
8425 if ((*toc_tls & (TLS_GD | TLS_LD)) != 0)
8426 found_tls_get_addr_arg = 1;
8427 if (retval > 1)
8428 toc_ref[toc_ref_index] = 1;
8429 }
8430 }
8431 continue;
8432 }
8433
8434 if (expecting_tls_get_addr != 1)
8435 continue;
8436
8437 /* Uh oh, we didn't find the expected call. We
8438 could just mark this symbol to exclude it
8439 from tls optimization but it's safer to skip
8440 the entire optimization. */
8441 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
8442 "TLS optimization disabled\n"),
8443 ibfd, sec, rel->r_offset);
8444 ret = TRUE;
8445 goto err_free_rel;
8446 }
8447
8448 if (expecting_tls_get_addr && htab->tls_get_addr != NULL)
8449 {
8450 struct plt_entry *ent;
8451 for (ent = htab->tls_get_addr->elf.plt.plist;
8452 ent != NULL;
8453 ent = ent->next)
8454 if (ent->addend == 0)
8455 {
8456 if (ent->plt.refcount > 0)
8457 {
8458 ent->plt.refcount -= 1;
8459 expecting_tls_get_addr = 0;
8460 }
8461 break;
8462 }
8463 }
8464
8465 if (expecting_tls_get_addr && htab->tls_get_addr_fd != NULL)
8466 {
8467 struct plt_entry *ent;
8468 for (ent = htab->tls_get_addr_fd->elf.plt.plist;
8469 ent != NULL;
8470 ent = ent->next)
8471 if (ent->addend == 0)
8472 {
8473 if (ent->plt.refcount > 0)
8474 ent->plt.refcount -= 1;
8475 break;
8476 }
8477 }
8478
8479 if (tls_clear == 0)
8480 continue;
8481
8482 if ((tls_set & TLS_EXPLICIT) == 0)
8483 {
8484 struct got_entry *ent;
8485
8486 /* Adjust got entry for this reloc. */
8487 if (h != NULL)
8488 ent = h->got.glist;
8489 else
8490 ent = elf_local_got_ents (ibfd)[r_symndx];
8491
8492 for (; ent != NULL; ent = ent->next)
8493 if (ent->addend == rel->r_addend
8494 && ent->owner == ibfd
8495 && ent->tls_type == tls_type)
8496 break;
8497 if (ent == NULL)
8498 abort ();
8499
8500 if (tls_set == 0)
8501 {
8502 /* We managed to get rid of a got entry. */
8503 if (ent->got.refcount > 0)
8504 ent->got.refcount -= 1;
8505 }
8506 }
8507 else
8508 {
8509 /* If we got rid of a DTPMOD/DTPREL reloc pair then
8510 we'll lose one or two dyn relocs. */
8511 if (!dec_dynrel_count (rel->r_info, sec, info,
8512 NULL, h, sym))
8513 return FALSE;
8514
8515 if (tls_set == (TLS_EXPLICIT | TLS_GD))
8516 {
8517 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
8518 NULL, h, sym))
8519 return FALSE;
8520 }
8521 }
8522
8523 *tls_mask |= tls_set;
8524 *tls_mask &= ~tls_clear;
8525 }
8526
8527 if (elf_section_data (sec)->relocs != relstart)
8528 free (relstart);
8529 }
8530
8531 if (locsyms != NULL
8532 && (elf_symtab_hdr (ibfd).contents != (unsigned char *) locsyms))
8533 {
8534 if (!info->keep_memory)
8535 free (locsyms);
8536 else
8537 elf_symtab_hdr (ibfd).contents = (unsigned char *) locsyms;
8538 }
8539 }
8540
8541 if (toc_ref != NULL)
8542 free (toc_ref);
8543 return TRUE;
8544 }
8545
8546 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
8547 the values of any global symbols in a toc section that has been
8548 edited. Globals in toc sections should be a rarity, so this function
8549 sets a flag if any are found in toc sections other than the one just
8550 edited, so that futher hash table traversals can be avoided. */
8551
8552 struct adjust_toc_info
8553 {
8554 asection *toc;
8555 unsigned long *skip;
8556 bfd_boolean global_toc_syms;
8557 };
8558
8559 enum toc_skip_enum { ref_from_discarded = 1, can_optimize = 2 };
8560
8561 static bfd_boolean
8562 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
8563 {
8564 struct ppc_link_hash_entry *eh;
8565 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
8566 unsigned long i;
8567
8568 if (h->root.type != bfd_link_hash_defined
8569 && h->root.type != bfd_link_hash_defweak)
8570 return TRUE;
8571
8572 eh = (struct ppc_link_hash_entry *) h;
8573 if (eh->adjust_done)
8574 return TRUE;
8575
8576 if (eh->elf.root.u.def.section == toc_inf->toc)
8577 {
8578 if (eh->elf.root.u.def.value > toc_inf->toc->rawsize)
8579 i = toc_inf->toc->rawsize >> 3;
8580 else
8581 i = eh->elf.root.u.def.value >> 3;
8582
8583 if ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0)
8584 {
8585 (*_bfd_error_handler)
8586 (_("%s defined on removed toc entry"), eh->elf.root.root.string);
8587 do
8588 ++i;
8589 while ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0);
8590 eh->elf.root.u.def.value = (bfd_vma) i << 3;
8591 }
8592
8593 eh->elf.root.u.def.value -= toc_inf->skip[i];
8594 eh->adjust_done = 1;
8595 }
8596 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
8597 toc_inf->global_toc_syms = TRUE;
8598
8599 return TRUE;
8600 }
8601
8602 /* Return TRUE iff INSN is one we expect on a _LO variety toc/got reloc. */
8603
8604 static bfd_boolean
8605 ok_lo_toc_insn (unsigned int insn)
8606 {
8607 return ((insn & (0x3f << 26)) == 14u << 26 /* addi */
8608 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
8609 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
8610 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
8611 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
8612 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
8613 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
8614 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
8615 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
8616 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
8617 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
8618 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
8619 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
8620 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
8621 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
8622 && (insn & 3) != 1)
8623 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
8624 && ((insn & 3) == 0 || (insn & 3) == 3))
8625 || (insn & (0x3f << 26)) == 12u << 26 /* addic */);
8626 }
8627
8628 /* Examine all relocs referencing .toc sections in order to remove
8629 unused .toc entries. */
8630
8631 bfd_boolean
8632 ppc64_elf_edit_toc (struct bfd_link_info *info)
8633 {
8634 bfd *ibfd;
8635 struct adjust_toc_info toc_inf;
8636 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8637
8638 htab->do_toc_opt = 1;
8639 toc_inf.global_toc_syms = TRUE;
8640 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
8641 {
8642 asection *toc, *sec;
8643 Elf_Internal_Shdr *symtab_hdr;
8644 Elf_Internal_Sym *local_syms;
8645 Elf_Internal_Rela *relstart, *rel, *toc_relocs;
8646 unsigned long *skip, *drop;
8647 unsigned char *used;
8648 unsigned char *keep, last, some_unused;
8649
8650 if (!is_ppc64_elf (ibfd))
8651 continue;
8652
8653 toc = bfd_get_section_by_name (ibfd, ".toc");
8654 if (toc == NULL
8655 || toc->size == 0
8656 || toc->sec_info_type == SEC_INFO_TYPE_JUST_SYMS
8657 || discarded_section (toc))
8658 continue;
8659
8660 toc_relocs = NULL;
8661 local_syms = NULL;
8662 symtab_hdr = &elf_symtab_hdr (ibfd);
8663
8664 /* Look at sections dropped from the final link. */
8665 skip = NULL;
8666 relstart = NULL;
8667 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8668 {
8669 if (sec->reloc_count == 0
8670 || !discarded_section (sec)
8671 || get_opd_info (sec)
8672 || (sec->flags & SEC_ALLOC) == 0
8673 || (sec->flags & SEC_DEBUGGING) != 0)
8674 continue;
8675
8676 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
8677 if (relstart == NULL)
8678 goto error_ret;
8679
8680 /* Run through the relocs to see which toc entries might be
8681 unused. */
8682 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8683 {
8684 enum elf_ppc64_reloc_type r_type;
8685 unsigned long r_symndx;
8686 asection *sym_sec;
8687 struct elf_link_hash_entry *h;
8688 Elf_Internal_Sym *sym;
8689 bfd_vma val;
8690
8691 r_type = ELF64_R_TYPE (rel->r_info);
8692 switch (r_type)
8693 {
8694 default:
8695 continue;
8696
8697 case R_PPC64_TOC16:
8698 case R_PPC64_TOC16_LO:
8699 case R_PPC64_TOC16_HI:
8700 case R_PPC64_TOC16_HA:
8701 case R_PPC64_TOC16_DS:
8702 case R_PPC64_TOC16_LO_DS:
8703 break;
8704 }
8705
8706 r_symndx = ELF64_R_SYM (rel->r_info);
8707 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8708 r_symndx, ibfd))
8709 goto error_ret;
8710
8711 if (sym_sec != toc)
8712 continue;
8713
8714 if (h != NULL)
8715 val = h->root.u.def.value;
8716 else
8717 val = sym->st_value;
8718 val += rel->r_addend;
8719
8720 if (val >= toc->size)
8721 continue;
8722
8723 /* Anything in the toc ought to be aligned to 8 bytes.
8724 If not, don't mark as unused. */
8725 if (val & 7)
8726 continue;
8727
8728 if (skip == NULL)
8729 {
8730 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
8731 if (skip == NULL)
8732 goto error_ret;
8733 }
8734
8735 skip[val >> 3] = ref_from_discarded;
8736 }
8737
8738 if (elf_section_data (sec)->relocs != relstart)
8739 free (relstart);
8740 }
8741
8742 /* For largetoc loads of address constants, we can convert
8743 . addis rx,2,addr@got@ha
8744 . ld ry,addr@got@l(rx)
8745 to
8746 . addis rx,2,addr@toc@ha
8747 . addi ry,rx,addr@toc@l
8748 when addr is within 2G of the toc pointer. This then means
8749 that the word storing "addr" in the toc is no longer needed. */
8750
8751 if (!ppc64_elf_tdata (ibfd)->has_small_toc_reloc
8752 && toc->output_section->rawsize < (bfd_vma) 1 << 31
8753 && toc->reloc_count != 0)
8754 {
8755 /* Read toc relocs. */
8756 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
8757 info->keep_memory);
8758 if (toc_relocs == NULL)
8759 goto error_ret;
8760
8761 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
8762 {
8763 enum elf_ppc64_reloc_type r_type;
8764 unsigned long r_symndx;
8765 asection *sym_sec;
8766 struct elf_link_hash_entry *h;
8767 Elf_Internal_Sym *sym;
8768 bfd_vma val, addr;
8769
8770 r_type = ELF64_R_TYPE (rel->r_info);
8771 if (r_type != R_PPC64_ADDR64)
8772 continue;
8773
8774 r_symndx = ELF64_R_SYM (rel->r_info);
8775 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8776 r_symndx, ibfd))
8777 goto error_ret;
8778
8779 if (sym_sec == NULL
8780 || discarded_section (sym_sec))
8781 continue;
8782
8783 if (!SYMBOL_REFERENCES_LOCAL (info, h))
8784 continue;
8785
8786 if (h != NULL)
8787 {
8788 if (h->type == STT_GNU_IFUNC)
8789 continue;
8790 val = h->root.u.def.value;
8791 }
8792 else
8793 {
8794 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
8795 continue;
8796 val = sym->st_value;
8797 }
8798 val += rel->r_addend;
8799 val += sym_sec->output_section->vma + sym_sec->output_offset;
8800
8801 /* We don't yet know the exact toc pointer value, but we
8802 know it will be somewhere in the toc section. Don't
8803 optimize if the difference from any possible toc
8804 pointer is outside [ff..f80008000, 7fff7fff]. */
8805 addr = toc->output_section->vma + TOC_BASE_OFF;
8806 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
8807 continue;
8808
8809 addr = toc->output_section->vma + toc->output_section->rawsize;
8810 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
8811 continue;
8812
8813 if (skip == NULL)
8814 {
8815 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
8816 if (skip == NULL)
8817 goto error_ret;
8818 }
8819
8820 skip[rel->r_offset >> 3]
8821 |= can_optimize | ((rel - toc_relocs) << 2);
8822 }
8823 }
8824
8825 if (skip == NULL)
8826 continue;
8827
8828 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
8829 if (used == NULL)
8830 {
8831 error_ret:
8832 if (local_syms != NULL
8833 && symtab_hdr->contents != (unsigned char *) local_syms)
8834 free (local_syms);
8835 if (sec != NULL
8836 && relstart != NULL
8837 && elf_section_data (sec)->relocs != relstart)
8838 free (relstart);
8839 if (toc_relocs != NULL
8840 && elf_section_data (toc)->relocs != toc_relocs)
8841 free (toc_relocs);
8842 if (skip != NULL)
8843 free (skip);
8844 return FALSE;
8845 }
8846
8847 /* Now check all kept sections that might reference the toc.
8848 Check the toc itself last. */
8849 for (sec = (ibfd->sections == toc && toc->next ? toc->next
8850 : ibfd->sections);
8851 sec != NULL;
8852 sec = (sec == toc ? NULL
8853 : sec->next == NULL ? toc
8854 : sec->next == toc && toc->next ? toc->next
8855 : sec->next))
8856 {
8857 int repeat;
8858
8859 if (sec->reloc_count == 0
8860 || discarded_section (sec)
8861 || get_opd_info (sec)
8862 || (sec->flags & SEC_ALLOC) == 0
8863 || (sec->flags & SEC_DEBUGGING) != 0)
8864 continue;
8865
8866 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8867 info->keep_memory);
8868 if (relstart == NULL)
8869 {
8870 free (used);
8871 goto error_ret;
8872 }
8873
8874 /* Mark toc entries referenced as used. */
8875 do
8876 {
8877 repeat = 0;
8878 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8879 {
8880 enum elf_ppc64_reloc_type r_type;
8881 unsigned long r_symndx;
8882 asection *sym_sec;
8883 struct elf_link_hash_entry *h;
8884 Elf_Internal_Sym *sym;
8885 bfd_vma val;
8886 enum {no_check, check_lo, check_ha} insn_check;
8887
8888 r_type = ELF64_R_TYPE (rel->r_info);
8889 switch (r_type)
8890 {
8891 default:
8892 insn_check = no_check;
8893 break;
8894
8895 case R_PPC64_GOT_TLSLD16_HA:
8896 case R_PPC64_GOT_TLSGD16_HA:
8897 case R_PPC64_GOT_TPREL16_HA:
8898 case R_PPC64_GOT_DTPREL16_HA:
8899 case R_PPC64_GOT16_HA:
8900 case R_PPC64_TOC16_HA:
8901 insn_check = check_ha;
8902 break;
8903
8904 case R_PPC64_GOT_TLSLD16_LO:
8905 case R_PPC64_GOT_TLSGD16_LO:
8906 case R_PPC64_GOT_TPREL16_LO_DS:
8907 case R_PPC64_GOT_DTPREL16_LO_DS:
8908 case R_PPC64_GOT16_LO:
8909 case R_PPC64_GOT16_LO_DS:
8910 case R_PPC64_TOC16_LO:
8911 case R_PPC64_TOC16_LO_DS:
8912 insn_check = check_lo;
8913 break;
8914 }
8915
8916 if (insn_check != no_check)
8917 {
8918 bfd_vma off = rel->r_offset & ~3;
8919 unsigned char buf[4];
8920 unsigned int insn;
8921
8922 if (!bfd_get_section_contents (ibfd, sec, buf, off, 4))
8923 {
8924 free (used);
8925 goto error_ret;
8926 }
8927 insn = bfd_get_32 (ibfd, buf);
8928 if (insn_check == check_lo
8929 ? !ok_lo_toc_insn (insn)
8930 : ((insn & ((0x3f << 26) | 0x1f << 16))
8931 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */))
8932 {
8933 char str[12];
8934
8935 ppc64_elf_tdata (ibfd)->unexpected_toc_insn = 1;
8936 sprintf (str, "%#08x", insn);
8937 info->callbacks->einfo
8938 (_("%P: %H: toc optimization is not supported for"
8939 " %s instruction.\n"),
8940 ibfd, sec, rel->r_offset & ~3, str);
8941 }
8942 }
8943
8944 switch (r_type)
8945 {
8946 case R_PPC64_TOC16:
8947 case R_PPC64_TOC16_LO:
8948 case R_PPC64_TOC16_HI:
8949 case R_PPC64_TOC16_HA:
8950 case R_PPC64_TOC16_DS:
8951 case R_PPC64_TOC16_LO_DS:
8952 /* In case we're taking addresses of toc entries. */
8953 case R_PPC64_ADDR64:
8954 break;
8955
8956 default:
8957 continue;
8958 }
8959
8960 r_symndx = ELF64_R_SYM (rel->r_info);
8961 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8962 r_symndx, ibfd))
8963 {
8964 free (used);
8965 goto error_ret;
8966 }
8967
8968 if (sym_sec != toc)
8969 continue;
8970
8971 if (h != NULL)
8972 val = h->root.u.def.value;
8973 else
8974 val = sym->st_value;
8975 val += rel->r_addend;
8976
8977 if (val >= toc->size)
8978 continue;
8979
8980 if ((skip[val >> 3] & can_optimize) != 0)
8981 {
8982 bfd_vma off;
8983 unsigned char opc;
8984
8985 switch (r_type)
8986 {
8987 case R_PPC64_TOC16_HA:
8988 break;
8989
8990 case R_PPC64_TOC16_LO_DS:
8991 off = rel->r_offset;
8992 off += (bfd_big_endian (ibfd) ? -2 : 3);
8993 if (!bfd_get_section_contents (ibfd, sec, &opc,
8994 off, 1))
8995 {
8996 free (used);
8997 goto error_ret;
8998 }
8999 if ((opc & (0x3f << 2)) == (58u << 2))
9000 break;
9001 /* Fall thru */
9002
9003 default:
9004 /* Wrong sort of reloc, or not a ld. We may
9005 as well clear ref_from_discarded too. */
9006 skip[val >> 3] = 0;
9007 }
9008 }
9009
9010 if (sec != toc)
9011 used[val >> 3] = 1;
9012 /* For the toc section, we only mark as used if this
9013 entry itself isn't unused. */
9014 else if ((used[rel->r_offset >> 3]
9015 || !(skip[rel->r_offset >> 3] & ref_from_discarded))
9016 && !used[val >> 3])
9017 {
9018 /* Do all the relocs again, to catch reference
9019 chains. */
9020 repeat = 1;
9021 used[val >> 3] = 1;
9022 }
9023 }
9024 }
9025 while (repeat);
9026
9027 if (elf_section_data (sec)->relocs != relstart)
9028 free (relstart);
9029 }
9030
9031 /* Merge the used and skip arrays. Assume that TOC
9032 doublewords not appearing as either used or unused belong
9033 to to an entry more than one doubleword in size. */
9034 for (drop = skip, keep = used, last = 0, some_unused = 0;
9035 drop < skip + (toc->size + 7) / 8;
9036 ++drop, ++keep)
9037 {
9038 if (*keep)
9039 {
9040 *drop &= ~ref_from_discarded;
9041 if ((*drop & can_optimize) != 0)
9042 some_unused = 1;
9043 last = 0;
9044 }
9045 else if ((*drop & ref_from_discarded) != 0)
9046 {
9047 some_unused = 1;
9048 last = ref_from_discarded;
9049 }
9050 else
9051 *drop = last;
9052 }
9053
9054 free (used);
9055
9056 if (some_unused)
9057 {
9058 bfd_byte *contents, *src;
9059 unsigned long off;
9060 Elf_Internal_Sym *sym;
9061 bfd_boolean local_toc_syms = FALSE;
9062
9063 /* Shuffle the toc contents, and at the same time convert the
9064 skip array from booleans into offsets. */
9065 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
9066 goto error_ret;
9067
9068 elf_section_data (toc)->this_hdr.contents = contents;
9069
9070 for (src = contents, off = 0, drop = skip;
9071 src < contents + toc->size;
9072 src += 8, ++drop)
9073 {
9074 if ((*drop & (can_optimize | ref_from_discarded)) != 0)
9075 off += 8;
9076 else if (off != 0)
9077 {
9078 *drop = off;
9079 memcpy (src - off, src, 8);
9080 }
9081 }
9082 *drop = off;
9083 toc->rawsize = toc->size;
9084 toc->size = src - contents - off;
9085
9086 /* Adjust addends for relocs against the toc section sym,
9087 and optimize any accesses we can. */
9088 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
9089 {
9090 if (sec->reloc_count == 0
9091 || discarded_section (sec))
9092 continue;
9093
9094 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
9095 info->keep_memory);
9096 if (relstart == NULL)
9097 goto error_ret;
9098
9099 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
9100 {
9101 enum elf_ppc64_reloc_type r_type;
9102 unsigned long r_symndx;
9103 asection *sym_sec;
9104 struct elf_link_hash_entry *h;
9105 bfd_vma val;
9106
9107 r_type = ELF64_R_TYPE (rel->r_info);
9108 switch (r_type)
9109 {
9110 default:
9111 continue;
9112
9113 case R_PPC64_TOC16:
9114 case R_PPC64_TOC16_LO:
9115 case R_PPC64_TOC16_HI:
9116 case R_PPC64_TOC16_HA:
9117 case R_PPC64_TOC16_DS:
9118 case R_PPC64_TOC16_LO_DS:
9119 case R_PPC64_ADDR64:
9120 break;
9121 }
9122
9123 r_symndx = ELF64_R_SYM (rel->r_info);
9124 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9125 r_symndx, ibfd))
9126 goto error_ret;
9127
9128 if (sym_sec != toc)
9129 continue;
9130
9131 if (h != NULL)
9132 val = h->root.u.def.value;
9133 else
9134 {
9135 val = sym->st_value;
9136 if (val != 0)
9137 local_toc_syms = TRUE;
9138 }
9139
9140 val += rel->r_addend;
9141
9142 if (val > toc->rawsize)
9143 val = toc->rawsize;
9144 else if ((skip[val >> 3] & ref_from_discarded) != 0)
9145 continue;
9146 else if ((skip[val >> 3] & can_optimize) != 0)
9147 {
9148 Elf_Internal_Rela *tocrel
9149 = toc_relocs + (skip[val >> 3] >> 2);
9150 unsigned long tsym = ELF64_R_SYM (tocrel->r_info);
9151
9152 switch (r_type)
9153 {
9154 case R_PPC64_TOC16_HA:
9155 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_TOC16_HA);
9156 break;
9157
9158 case R_PPC64_TOC16_LO_DS:
9159 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_LO_DS_OPT);
9160 break;
9161
9162 default:
9163 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
9164 ppc_howto_init ();
9165 info->callbacks->einfo
9166 (_("%P: %H: %s references "
9167 "optimized away TOC entry\n"),
9168 ibfd, sec, rel->r_offset,
9169 ppc64_elf_howto_table[r_type]->name);
9170 bfd_set_error (bfd_error_bad_value);
9171 goto error_ret;
9172 }
9173 rel->r_addend = tocrel->r_addend;
9174 elf_section_data (sec)->relocs = relstart;
9175 continue;
9176 }
9177
9178 if (h != NULL || sym->st_value != 0)
9179 continue;
9180
9181 rel->r_addend -= skip[val >> 3];
9182 elf_section_data (sec)->relocs = relstart;
9183 }
9184
9185 if (elf_section_data (sec)->relocs != relstart)
9186 free (relstart);
9187 }
9188
9189 /* We shouldn't have local or global symbols defined in the TOC,
9190 but handle them anyway. */
9191 if (local_syms != NULL)
9192 for (sym = local_syms;
9193 sym < local_syms + symtab_hdr->sh_info;
9194 ++sym)
9195 if (sym->st_value != 0
9196 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
9197 {
9198 unsigned long i;
9199
9200 if (sym->st_value > toc->rawsize)
9201 i = toc->rawsize >> 3;
9202 else
9203 i = sym->st_value >> 3;
9204
9205 if ((skip[i] & (ref_from_discarded | can_optimize)) != 0)
9206 {
9207 if (local_toc_syms)
9208 (*_bfd_error_handler)
9209 (_("%s defined on removed toc entry"),
9210 bfd_elf_sym_name (ibfd, symtab_hdr, sym, NULL));
9211 do
9212 ++i;
9213 while ((skip[i] & (ref_from_discarded | can_optimize)));
9214 sym->st_value = (bfd_vma) i << 3;
9215 }
9216
9217 sym->st_value -= skip[i];
9218 symtab_hdr->contents = (unsigned char *) local_syms;
9219 }
9220
9221 /* Adjust any global syms defined in this toc input section. */
9222 if (toc_inf.global_toc_syms)
9223 {
9224 toc_inf.toc = toc;
9225 toc_inf.skip = skip;
9226 toc_inf.global_toc_syms = FALSE;
9227 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
9228 &toc_inf);
9229 }
9230
9231 if (toc->reloc_count != 0)
9232 {
9233 Elf_Internal_Shdr *rel_hdr;
9234 Elf_Internal_Rela *wrel;
9235 bfd_size_type sz;
9236
9237 /* Remove unused toc relocs, and adjust those we keep. */
9238 if (toc_relocs == NULL)
9239 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
9240 info->keep_memory);
9241 if (toc_relocs == NULL)
9242 goto error_ret;
9243
9244 wrel = toc_relocs;
9245 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
9246 if ((skip[rel->r_offset >> 3]
9247 & (ref_from_discarded | can_optimize)) == 0)
9248 {
9249 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
9250 wrel->r_info = rel->r_info;
9251 wrel->r_addend = rel->r_addend;
9252 ++wrel;
9253 }
9254 else if (!dec_dynrel_count (rel->r_info, toc, info,
9255 &local_syms, NULL, NULL))
9256 goto error_ret;
9257
9258 elf_section_data (toc)->relocs = toc_relocs;
9259 toc->reloc_count = wrel - toc_relocs;
9260 rel_hdr = _bfd_elf_single_rel_hdr (toc);
9261 sz = rel_hdr->sh_entsize;
9262 rel_hdr->sh_size = toc->reloc_count * sz;
9263 }
9264 }
9265 else if (toc_relocs != NULL
9266 && elf_section_data (toc)->relocs != toc_relocs)
9267 free (toc_relocs);
9268
9269 if (local_syms != NULL
9270 && symtab_hdr->contents != (unsigned char *) local_syms)
9271 {
9272 if (!info->keep_memory)
9273 free (local_syms);
9274 else
9275 symtab_hdr->contents = (unsigned char *) local_syms;
9276 }
9277 free (skip);
9278 }
9279
9280 return TRUE;
9281 }
9282
9283 /* Return true iff input section I references the TOC using
9284 instructions limited to +/-32k offsets. */
9285
9286 bfd_boolean
9287 ppc64_elf_has_small_toc_reloc (asection *i)
9288 {
9289 return (is_ppc64_elf (i->owner)
9290 && ppc64_elf_tdata (i->owner)->has_small_toc_reloc);
9291 }
9292
9293 /* Allocate space for one GOT entry. */
9294
9295 static void
9296 allocate_got (struct elf_link_hash_entry *h,
9297 struct bfd_link_info *info,
9298 struct got_entry *gent)
9299 {
9300 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9301 bfd_boolean dyn;
9302 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
9303 int entsize = (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)
9304 ? 16 : 8);
9305 int rentsize = (gent->tls_type & eh->tls_mask & TLS_GD
9306 ? 2 : 1) * sizeof (Elf64_External_Rela);
9307 asection *got = ppc64_elf_tdata (gent->owner)->got;
9308
9309 gent->got.offset = got->size;
9310 got->size += entsize;
9311
9312 dyn = htab->elf.dynamic_sections_created;
9313 if (h->type == STT_GNU_IFUNC)
9314 {
9315 htab->elf.irelplt->size += rentsize;
9316 htab->got_reli_size += rentsize;
9317 }
9318 else if ((info->shared
9319 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
9320 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
9321 || h->root.type != bfd_link_hash_undefweak))
9322 {
9323 asection *relgot = ppc64_elf_tdata (gent->owner)->relgot;
9324 relgot->size += rentsize;
9325 }
9326 }
9327
9328 /* This function merges got entries in the same toc group. */
9329
9330 static void
9331 merge_got_entries (struct got_entry **pent)
9332 {
9333 struct got_entry *ent, *ent2;
9334
9335 for (ent = *pent; ent != NULL; ent = ent->next)
9336 if (!ent->is_indirect)
9337 for (ent2 = ent->next; ent2 != NULL; ent2 = ent2->next)
9338 if (!ent2->is_indirect
9339 && ent2->addend == ent->addend
9340 && ent2->tls_type == ent->tls_type
9341 && elf_gp (ent2->owner) == elf_gp (ent->owner))
9342 {
9343 ent2->is_indirect = TRUE;
9344 ent2->got.ent = ent;
9345 }
9346 }
9347
9348 /* Allocate space in .plt, .got and associated reloc sections for
9349 dynamic relocs. */
9350
9351 static bfd_boolean
9352 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
9353 {
9354 struct bfd_link_info *info;
9355 struct ppc_link_hash_table *htab;
9356 asection *s;
9357 struct ppc_link_hash_entry *eh;
9358 struct elf_dyn_relocs *p;
9359 struct got_entry **pgent, *gent;
9360
9361 if (h->root.type == bfd_link_hash_indirect)
9362 return TRUE;
9363
9364 info = (struct bfd_link_info *) inf;
9365 htab = ppc_hash_table (info);
9366 if (htab == NULL)
9367 return FALSE;
9368
9369 if ((htab->elf.dynamic_sections_created
9370 && h->dynindx != -1
9371 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h))
9372 || h->type == STT_GNU_IFUNC)
9373 {
9374 struct plt_entry *pent;
9375 bfd_boolean doneone = FALSE;
9376 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
9377 if (pent->plt.refcount > 0)
9378 {
9379 if (!htab->elf.dynamic_sections_created
9380 || h->dynindx == -1)
9381 {
9382 s = htab->elf.iplt;
9383 pent->plt.offset = s->size;
9384 s->size += PLT_ENTRY_SIZE (htab);
9385 s = htab->elf.irelplt;
9386 }
9387 else
9388 {
9389 /* If this is the first .plt entry, make room for the special
9390 first entry. */
9391 s = htab->elf.splt;
9392 if (s->size == 0)
9393 s->size += PLT_INITIAL_ENTRY_SIZE (htab);
9394
9395 pent->plt.offset = s->size;
9396
9397 /* Make room for this entry. */
9398 s->size += PLT_ENTRY_SIZE (htab);
9399
9400 /* Make room for the .glink code. */
9401 s = htab->glink;
9402 if (s->size == 0)
9403 s->size += GLINK_CALL_STUB_SIZE;
9404 if (htab->opd_abi)
9405 {
9406 /* We need bigger stubs past index 32767. */
9407 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
9408 s->size += 4;
9409 s->size += 2*4;
9410 }
9411 else
9412 s->size += 4;
9413
9414 /* We also need to make an entry in the .rela.plt section. */
9415 s = htab->elf.srelplt;
9416 }
9417 s->size += sizeof (Elf64_External_Rela);
9418 doneone = TRUE;
9419 }
9420 else
9421 pent->plt.offset = (bfd_vma) -1;
9422 if (!doneone)
9423 {
9424 h->plt.plist = NULL;
9425 h->needs_plt = 0;
9426 }
9427 }
9428 else
9429 {
9430 h->plt.plist = NULL;
9431 h->needs_plt = 0;
9432 }
9433
9434 eh = (struct ppc_link_hash_entry *) h;
9435 /* Run through the TLS GD got entries first if we're changing them
9436 to TPREL. */
9437 if ((eh->tls_mask & TLS_TPRELGD) != 0)
9438 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9439 if (gent->got.refcount > 0
9440 && (gent->tls_type & TLS_GD) != 0)
9441 {
9442 /* This was a GD entry that has been converted to TPREL. If
9443 there happens to be a TPREL entry we can use that one. */
9444 struct got_entry *ent;
9445 for (ent = h->got.glist; ent != NULL; ent = ent->next)
9446 if (ent->got.refcount > 0
9447 && (ent->tls_type & TLS_TPREL) != 0
9448 && ent->addend == gent->addend
9449 && ent->owner == gent->owner)
9450 {
9451 gent->got.refcount = 0;
9452 break;
9453 }
9454
9455 /* If not, then we'll be using our own TPREL entry. */
9456 if (gent->got.refcount != 0)
9457 gent->tls_type = TLS_TLS | TLS_TPREL;
9458 }
9459
9460 /* Remove any list entry that won't generate a word in the GOT before
9461 we call merge_got_entries. Otherwise we risk merging to empty
9462 entries. */
9463 pgent = &h->got.glist;
9464 while ((gent = *pgent) != NULL)
9465 if (gent->got.refcount > 0)
9466 {
9467 if ((gent->tls_type & TLS_LD) != 0
9468 && !h->def_dynamic)
9469 {
9470 ppc64_tlsld_got (gent->owner)->got.refcount += 1;
9471 *pgent = gent->next;
9472 }
9473 else
9474 pgent = &gent->next;
9475 }
9476 else
9477 *pgent = gent->next;
9478
9479 if (!htab->do_multi_toc)
9480 merge_got_entries (&h->got.glist);
9481
9482 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9483 if (!gent->is_indirect)
9484 {
9485 /* Make sure this symbol is output as a dynamic symbol.
9486 Undefined weak syms won't yet be marked as dynamic,
9487 nor will all TLS symbols. */
9488 if (h->dynindx == -1
9489 && !h->forced_local
9490 && h->type != STT_GNU_IFUNC
9491 && htab->elf.dynamic_sections_created)
9492 {
9493 if (! bfd_elf_link_record_dynamic_symbol (info, h))
9494 return FALSE;
9495 }
9496
9497 if (!is_ppc64_elf (gent->owner))
9498 abort ();
9499
9500 allocate_got (h, info, gent);
9501 }
9502
9503 if (eh->dyn_relocs == NULL
9504 || (!htab->elf.dynamic_sections_created
9505 && h->type != STT_GNU_IFUNC))
9506 return TRUE;
9507
9508 /* In the shared -Bsymbolic case, discard space allocated for
9509 dynamic pc-relative relocs against symbols which turn out to be
9510 defined in regular objects. For the normal shared case, discard
9511 space for relocs that have become local due to symbol visibility
9512 changes. */
9513
9514 if (info->shared)
9515 {
9516 /* Relocs that use pc_count are those that appear on a call insn,
9517 or certain REL relocs (see must_be_dyn_reloc) that can be
9518 generated via assembly. We want calls to protected symbols to
9519 resolve directly to the function rather than going via the plt.
9520 If people want function pointer comparisons to work as expected
9521 then they should avoid writing weird assembly. */
9522 if (SYMBOL_CALLS_LOCAL (info, h))
9523 {
9524 struct elf_dyn_relocs **pp;
9525
9526 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
9527 {
9528 p->count -= p->pc_count;
9529 p->pc_count = 0;
9530 if (p->count == 0)
9531 *pp = p->next;
9532 else
9533 pp = &p->next;
9534 }
9535 }
9536
9537 /* Also discard relocs on undefined weak syms with non-default
9538 visibility. */
9539 if (eh->dyn_relocs != NULL
9540 && h->root.type == bfd_link_hash_undefweak)
9541 {
9542 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
9543 eh->dyn_relocs = NULL;
9544
9545 /* Make sure this symbol is output as a dynamic symbol.
9546 Undefined weak syms won't yet be marked as dynamic. */
9547 else if (h->dynindx == -1
9548 && !h->forced_local)
9549 {
9550 if (! bfd_elf_link_record_dynamic_symbol (info, h))
9551 return FALSE;
9552 }
9553 }
9554 }
9555 else if (h->type == STT_GNU_IFUNC)
9556 {
9557 if (!h->non_got_ref)
9558 eh->dyn_relocs = NULL;
9559 }
9560 else if (ELIMINATE_COPY_RELOCS)
9561 {
9562 /* For the non-shared case, discard space for relocs against
9563 symbols which turn out to need copy relocs or are not
9564 dynamic. */
9565
9566 if (!h->non_got_ref
9567 && !h->def_regular)
9568 {
9569 /* Make sure this symbol is output as a dynamic symbol.
9570 Undefined weak syms won't yet be marked as dynamic. */
9571 if (h->dynindx == -1
9572 && !h->forced_local)
9573 {
9574 if (! bfd_elf_link_record_dynamic_symbol (info, h))
9575 return FALSE;
9576 }
9577
9578 /* If that succeeded, we know we'll be keeping all the
9579 relocs. */
9580 if (h->dynindx != -1)
9581 goto keep;
9582 }
9583
9584 eh->dyn_relocs = NULL;
9585
9586 keep: ;
9587 }
9588
9589 /* Finally, allocate space. */
9590 for (p = eh->dyn_relocs; p != NULL; p = p->next)
9591 {
9592 asection *sreloc = elf_section_data (p->sec)->sreloc;
9593 if (eh->elf.type == STT_GNU_IFUNC)
9594 sreloc = htab->elf.irelplt;
9595 sreloc->size += p->count * sizeof (Elf64_External_Rela);
9596 }
9597
9598 return TRUE;
9599 }
9600
9601 /* Called via elf_link_hash_traverse from ppc64_elf_size_dynamic_sections
9602 to set up space for global entry stubs. These are put in glink,
9603 after the branch table. */
9604
9605 static bfd_boolean
9606 size_global_entry_stubs (struct elf_link_hash_entry *h, void *inf)
9607 {
9608 struct bfd_link_info *info;
9609 struct ppc_link_hash_table *htab;
9610 struct plt_entry *pent;
9611 asection *s;
9612
9613 if (h->root.type == bfd_link_hash_indirect)
9614 return TRUE;
9615
9616 if (!h->pointer_equality_needed)
9617 return TRUE;
9618
9619 if (h->def_regular)
9620 return TRUE;
9621
9622 info = inf;
9623 htab = ppc_hash_table (info);
9624 if (htab == NULL)
9625 return FALSE;
9626
9627 s = htab->glink;
9628 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
9629 if (pent->plt.offset != (bfd_vma) -1
9630 && pent->addend == 0)
9631 {
9632 /* For ELFv2, if this symbol is not defined in a regular file
9633 and we are not generating a shared library or pie, then we
9634 need to define the symbol in the executable on a call stub.
9635 This is to avoid text relocations. */
9636 s->size = (s->size + 15) & -16;
9637 h->root.u.def.section = s;
9638 h->root.u.def.value = s->size;
9639 s->size += 16;
9640 break;
9641 }
9642 return TRUE;
9643 }
9644
9645 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
9646 read-only sections. */
9647
9648 static bfd_boolean
9649 maybe_set_textrel (struct elf_link_hash_entry *h, void *info)
9650 {
9651 if (h->root.type == bfd_link_hash_indirect)
9652 return TRUE;
9653
9654 if (readonly_dynrelocs (h))
9655 {
9656 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
9657
9658 /* Not an error, just cut short the traversal. */
9659 return FALSE;
9660 }
9661 return TRUE;
9662 }
9663
9664 /* Set the sizes of the dynamic sections. */
9665
9666 static bfd_boolean
9667 ppc64_elf_size_dynamic_sections (bfd *output_bfd,
9668 struct bfd_link_info *info)
9669 {
9670 struct ppc_link_hash_table *htab;
9671 bfd *dynobj;
9672 asection *s;
9673 bfd_boolean relocs;
9674 bfd *ibfd;
9675 struct got_entry *first_tlsld;
9676
9677 htab = ppc_hash_table (info);
9678 if (htab == NULL)
9679 return FALSE;
9680
9681 dynobj = htab->elf.dynobj;
9682 if (dynobj == NULL)
9683 abort ();
9684
9685 if (htab->elf.dynamic_sections_created)
9686 {
9687 /* Set the contents of the .interp section to the interpreter. */
9688 if (info->executable)
9689 {
9690 s = bfd_get_linker_section (dynobj, ".interp");
9691 if (s == NULL)
9692 abort ();
9693 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
9694 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
9695 }
9696 }
9697
9698 /* Set up .got offsets for local syms, and space for local dynamic
9699 relocs. */
9700 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
9701 {
9702 struct got_entry **lgot_ents;
9703 struct got_entry **end_lgot_ents;
9704 struct plt_entry **local_plt;
9705 struct plt_entry **end_local_plt;
9706 unsigned char *lgot_masks;
9707 bfd_size_type locsymcount;
9708 Elf_Internal_Shdr *symtab_hdr;
9709
9710 if (!is_ppc64_elf (ibfd))
9711 continue;
9712
9713 for (s = ibfd->sections; s != NULL; s = s->next)
9714 {
9715 struct ppc_dyn_relocs *p;
9716
9717 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
9718 {
9719 if (!bfd_is_abs_section (p->sec)
9720 && bfd_is_abs_section (p->sec->output_section))
9721 {
9722 /* Input section has been discarded, either because
9723 it is a copy of a linkonce section or due to
9724 linker script /DISCARD/, so we'll be discarding
9725 the relocs too. */
9726 }
9727 else if (p->count != 0)
9728 {
9729 asection *srel = elf_section_data (p->sec)->sreloc;
9730 if (p->ifunc)
9731 srel = htab->elf.irelplt;
9732 srel->size += p->count * sizeof (Elf64_External_Rela);
9733 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
9734 info->flags |= DF_TEXTREL;
9735 }
9736 }
9737 }
9738
9739 lgot_ents = elf_local_got_ents (ibfd);
9740 if (!lgot_ents)
9741 continue;
9742
9743 symtab_hdr = &elf_symtab_hdr (ibfd);
9744 locsymcount = symtab_hdr->sh_info;
9745 end_lgot_ents = lgot_ents + locsymcount;
9746 local_plt = (struct plt_entry **) end_lgot_ents;
9747 end_local_plt = local_plt + locsymcount;
9748 lgot_masks = (unsigned char *) end_local_plt;
9749 s = ppc64_elf_tdata (ibfd)->got;
9750 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
9751 {
9752 struct got_entry **pent, *ent;
9753
9754 pent = lgot_ents;
9755 while ((ent = *pent) != NULL)
9756 if (ent->got.refcount > 0)
9757 {
9758 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
9759 {
9760 ppc64_tlsld_got (ibfd)->got.refcount += 1;
9761 *pent = ent->next;
9762 }
9763 else
9764 {
9765 unsigned int ent_size = 8;
9766 unsigned int rel_size = sizeof (Elf64_External_Rela);
9767
9768 ent->got.offset = s->size;
9769 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
9770 {
9771 ent_size *= 2;
9772 rel_size *= 2;
9773 }
9774 s->size += ent_size;
9775 if ((*lgot_masks & PLT_IFUNC) != 0)
9776 {
9777 htab->elf.irelplt->size += rel_size;
9778 htab->got_reli_size += rel_size;
9779 }
9780 else if (info->shared)
9781 {
9782 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
9783 srel->size += rel_size;
9784 }
9785 pent = &ent->next;
9786 }
9787 }
9788 else
9789 *pent = ent->next;
9790 }
9791
9792 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
9793 for (; local_plt < end_local_plt; ++local_plt)
9794 {
9795 struct plt_entry *ent;
9796
9797 for (ent = *local_plt; ent != NULL; ent = ent->next)
9798 if (ent->plt.refcount > 0)
9799 {
9800 s = htab->elf.iplt;
9801 ent->plt.offset = s->size;
9802 s->size += PLT_ENTRY_SIZE (htab);
9803
9804 htab->elf.irelplt->size += sizeof (Elf64_External_Rela);
9805 }
9806 else
9807 ent->plt.offset = (bfd_vma) -1;
9808 }
9809 }
9810
9811 /* Allocate global sym .plt and .got entries, and space for global
9812 sym dynamic relocs. */
9813 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
9814 /* Stash the end of glink branch table. */
9815 if (htab->glink != NULL)
9816 htab->glink->rawsize = htab->glink->size;
9817
9818 if (!htab->opd_abi && !info->shared)
9819 elf_link_hash_traverse (&htab->elf, size_global_entry_stubs, info);
9820
9821 first_tlsld = NULL;
9822 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
9823 {
9824 struct got_entry *ent;
9825
9826 if (!is_ppc64_elf (ibfd))
9827 continue;
9828
9829 ent = ppc64_tlsld_got (ibfd);
9830 if (ent->got.refcount > 0)
9831 {
9832 if (!htab->do_multi_toc && first_tlsld != NULL)
9833 {
9834 ent->is_indirect = TRUE;
9835 ent->got.ent = first_tlsld;
9836 }
9837 else
9838 {
9839 if (first_tlsld == NULL)
9840 first_tlsld = ent;
9841 s = ppc64_elf_tdata (ibfd)->got;
9842 ent->got.offset = s->size;
9843 ent->owner = ibfd;
9844 s->size += 16;
9845 if (info->shared)
9846 {
9847 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
9848 srel->size += sizeof (Elf64_External_Rela);
9849 }
9850 }
9851 }
9852 else
9853 ent->got.offset = (bfd_vma) -1;
9854 }
9855
9856 /* We now have determined the sizes of the various dynamic sections.
9857 Allocate memory for them. */
9858 relocs = FALSE;
9859 for (s = dynobj->sections; s != NULL; s = s->next)
9860 {
9861 if ((s->flags & SEC_LINKER_CREATED) == 0)
9862 continue;
9863
9864 if (s == htab->brlt || s == htab->relbrlt)
9865 /* These haven't been allocated yet; don't strip. */
9866 continue;
9867 else if (s == htab->elf.sgot
9868 || s == htab->elf.splt
9869 || s == htab->elf.iplt
9870 || s == htab->glink
9871 || s == htab->dynbss)
9872 {
9873 /* Strip this section if we don't need it; see the
9874 comment below. */
9875 }
9876 else if (s == htab->glink_eh_frame)
9877 {
9878 if (!bfd_is_abs_section (s->output_section))
9879 /* Not sized yet. */
9880 continue;
9881 }
9882 else if (CONST_STRNEQ (s->name, ".rela"))
9883 {
9884 if (s->size != 0)
9885 {
9886 if (s != htab->elf.srelplt)
9887 relocs = TRUE;
9888
9889 /* We use the reloc_count field as a counter if we need
9890 to copy relocs into the output file. */
9891 s->reloc_count = 0;
9892 }
9893 }
9894 else
9895 {
9896 /* It's not one of our sections, so don't allocate space. */
9897 continue;
9898 }
9899
9900 if (s->size == 0)
9901 {
9902 /* If we don't need this section, strip it from the
9903 output file. This is mostly to handle .rela.bss and
9904 .rela.plt. We must create both sections in
9905 create_dynamic_sections, because they must be created
9906 before the linker maps input sections to output
9907 sections. The linker does that before
9908 adjust_dynamic_symbol is called, and it is that
9909 function which decides whether anything needs to go
9910 into these sections. */
9911 s->flags |= SEC_EXCLUDE;
9912 continue;
9913 }
9914
9915 if ((s->flags & SEC_HAS_CONTENTS) == 0)
9916 continue;
9917
9918 /* Allocate memory for the section contents. We use bfd_zalloc
9919 here in case unused entries are not reclaimed before the
9920 section's contents are written out. This should not happen,
9921 but this way if it does we get a R_PPC64_NONE reloc in .rela
9922 sections instead of garbage.
9923 We also rely on the section contents being zero when writing
9924 the GOT. */
9925 s->contents = bfd_zalloc (dynobj, s->size);
9926 if (s->contents == NULL)
9927 return FALSE;
9928 }
9929
9930 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
9931 {
9932 if (!is_ppc64_elf (ibfd))
9933 continue;
9934
9935 s = ppc64_elf_tdata (ibfd)->got;
9936 if (s != NULL && s != htab->elf.sgot)
9937 {
9938 if (s->size == 0)
9939 s->flags |= SEC_EXCLUDE;
9940 else
9941 {
9942 s->contents = bfd_zalloc (ibfd, s->size);
9943 if (s->contents == NULL)
9944 return FALSE;
9945 }
9946 }
9947 s = ppc64_elf_tdata (ibfd)->relgot;
9948 if (s != NULL)
9949 {
9950 if (s->size == 0)
9951 s->flags |= SEC_EXCLUDE;
9952 else
9953 {
9954 s->contents = bfd_zalloc (ibfd, s->size);
9955 if (s->contents == NULL)
9956 return FALSE;
9957 relocs = TRUE;
9958 s->reloc_count = 0;
9959 }
9960 }
9961 }
9962
9963 if (htab->elf.dynamic_sections_created)
9964 {
9965 bfd_boolean tls_opt;
9966
9967 /* Add some entries to the .dynamic section. We fill in the
9968 values later, in ppc64_elf_finish_dynamic_sections, but we
9969 must add the entries now so that we get the correct size for
9970 the .dynamic section. The DT_DEBUG entry is filled in by the
9971 dynamic linker and used by the debugger. */
9972 #define add_dynamic_entry(TAG, VAL) \
9973 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
9974
9975 if (info->executable)
9976 {
9977 if (!add_dynamic_entry (DT_DEBUG, 0))
9978 return FALSE;
9979 }
9980
9981 if (htab->elf.splt != NULL && htab->elf.splt->size != 0)
9982 {
9983 if (!add_dynamic_entry (DT_PLTGOT, 0)
9984 || !add_dynamic_entry (DT_PLTRELSZ, 0)
9985 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
9986 || !add_dynamic_entry (DT_JMPREL, 0)
9987 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
9988 return FALSE;
9989 }
9990
9991 if (NO_OPD_RELOCS && abiversion (output_bfd) <= 1)
9992 {
9993 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
9994 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
9995 return FALSE;
9996 }
9997
9998 tls_opt = (!htab->params->no_tls_get_addr_opt
9999 && htab->tls_get_addr_fd != NULL
10000 && htab->tls_get_addr_fd->elf.plt.plist != NULL);
10001 if (tls_opt || !htab->opd_abi)
10002 {
10003 if (!add_dynamic_entry (DT_PPC64_OPT, tls_opt ? PPC64_OPT_TLS : 0))
10004 return FALSE;
10005 }
10006
10007 if (relocs)
10008 {
10009 if (!add_dynamic_entry (DT_RELA, 0)
10010 || !add_dynamic_entry (DT_RELASZ, 0)
10011 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
10012 return FALSE;
10013
10014 /* If any dynamic relocs apply to a read-only section,
10015 then we need a DT_TEXTREL entry. */
10016 if ((info->flags & DF_TEXTREL) == 0)
10017 elf_link_hash_traverse (&htab->elf, maybe_set_textrel, info);
10018
10019 if ((info->flags & DF_TEXTREL) != 0)
10020 {
10021 if (!add_dynamic_entry (DT_TEXTREL, 0))
10022 return FALSE;
10023 }
10024 }
10025 }
10026 #undef add_dynamic_entry
10027
10028 return TRUE;
10029 }
10030
10031 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
10032
10033 static bfd_boolean
10034 ppc64_elf_hash_symbol (struct elf_link_hash_entry *h)
10035 {
10036 if (h->plt.plist != NULL
10037 && !h->def_regular
10038 && !h->pointer_equality_needed)
10039 return FALSE;
10040
10041 return _bfd_elf_hash_symbol (h);
10042 }
10043
10044 /* Determine the type of stub needed, if any, for a call. */
10045
10046 static inline enum ppc_stub_type
10047 ppc_type_of_stub (asection *input_sec,
10048 const Elf_Internal_Rela *rel,
10049 struct ppc_link_hash_entry **hash,
10050 struct plt_entry **plt_ent,
10051 bfd_vma destination,
10052 unsigned long local_off)
10053 {
10054 struct ppc_link_hash_entry *h = *hash;
10055 bfd_vma location;
10056 bfd_vma branch_offset;
10057 bfd_vma max_branch_offset;
10058 enum elf_ppc64_reloc_type r_type;
10059
10060 if (h != NULL)
10061 {
10062 struct plt_entry *ent;
10063 struct ppc_link_hash_entry *fdh = h;
10064 if (h->oh != NULL
10065 && h->oh->is_func_descriptor)
10066 {
10067 fdh = ppc_follow_link (h->oh);
10068 *hash = fdh;
10069 }
10070
10071 for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next)
10072 if (ent->addend == rel->r_addend
10073 && ent->plt.offset != (bfd_vma) -1)
10074 {
10075 *plt_ent = ent;
10076 return ppc_stub_plt_call;
10077 }
10078
10079 /* Here, we know we don't have a plt entry. If we don't have a
10080 either a defined function descriptor or a defined entry symbol
10081 in a regular object file, then it is pointless trying to make
10082 any other type of stub. */
10083 if (!is_static_defined (&fdh->elf)
10084 && !is_static_defined (&h->elf))
10085 return ppc_stub_none;
10086 }
10087 else if (elf_local_got_ents (input_sec->owner) != NULL)
10088 {
10089 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (input_sec->owner);
10090 struct plt_entry **local_plt = (struct plt_entry **)
10091 elf_local_got_ents (input_sec->owner) + symtab_hdr->sh_info;
10092 unsigned long r_symndx = ELF64_R_SYM (rel->r_info);
10093
10094 if (local_plt[r_symndx] != NULL)
10095 {
10096 struct plt_entry *ent;
10097
10098 for (ent = local_plt[r_symndx]; ent != NULL; ent = ent->next)
10099 if (ent->addend == rel->r_addend
10100 && ent->plt.offset != (bfd_vma) -1)
10101 {
10102 *plt_ent = ent;
10103 return ppc_stub_plt_call;
10104 }
10105 }
10106 }
10107
10108 /* Determine where the call point is. */
10109 location = (input_sec->output_offset
10110 + input_sec->output_section->vma
10111 + rel->r_offset);
10112
10113 branch_offset = destination - location;
10114 r_type = ELF64_R_TYPE (rel->r_info);
10115
10116 /* Determine if a long branch stub is needed. */
10117 max_branch_offset = 1 << 25;
10118 if (r_type != R_PPC64_REL24)
10119 max_branch_offset = 1 << 15;
10120
10121 if (branch_offset + max_branch_offset >= 2 * max_branch_offset - local_off)
10122 /* We need a stub. Figure out whether a long_branch or plt_branch
10123 is needed later. */
10124 return ppc_stub_long_branch;
10125
10126 return ppc_stub_none;
10127 }
10128
10129 /* With power7 weakly ordered memory model, it is possible for ld.so
10130 to update a plt entry in one thread and have another thread see a
10131 stale zero toc entry. To avoid this we need some sort of acquire
10132 barrier in the call stub. One solution is to make the load of the
10133 toc word seem to appear to depend on the load of the function entry
10134 word. Another solution is to test for r2 being zero, and branch to
10135 the appropriate glink entry if so.
10136
10137 . fake dep barrier compare
10138 . ld 12,xxx(2) ld 12,xxx(2)
10139 . mtctr 12 mtctr 12
10140 . xor 11,12,12 ld 2,xxx+8(2)
10141 . add 2,2,11 cmpldi 2,0
10142 . ld 2,xxx+8(2) bnectr+
10143 . bctr b <glink_entry>
10144
10145 The solution involving the compare turns out to be faster, so
10146 that's what we use unless the branch won't reach. */
10147
10148 #define ALWAYS_USE_FAKE_DEP 0
10149 #define ALWAYS_EMIT_R2SAVE 0
10150
10151 #define PPC_LO(v) ((v) & 0xffff)
10152 #define PPC_HI(v) (((v) >> 16) & 0xffff)
10153 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
10154
10155 static inline unsigned int
10156 plt_stub_size (struct ppc_link_hash_table *htab,
10157 struct ppc_stub_hash_entry *stub_entry,
10158 bfd_vma off)
10159 {
10160 unsigned size = 12;
10161
10162 if (ALWAYS_EMIT_R2SAVE
10163 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10164 size += 4;
10165 if (PPC_HA (off) != 0)
10166 size += 4;
10167 if (htab->opd_abi)
10168 {
10169 size += 4;
10170 if (htab->params->plt_static_chain)
10171 size += 4;
10172 if (htab->params->plt_thread_safe)
10173 size += 8;
10174 if (PPC_HA (off + 8 + 8 * htab->params->plt_static_chain) != PPC_HA (off))
10175 size += 4;
10176 }
10177 if (stub_entry->h != NULL
10178 && (stub_entry->h == htab->tls_get_addr_fd
10179 || stub_entry->h == htab->tls_get_addr)
10180 && !htab->params->no_tls_get_addr_opt)
10181 size += 13 * 4;
10182 return size;
10183 }
10184
10185 /* If this stub would cross fewer 2**plt_stub_align boundaries if we align,
10186 then return the padding needed to do so. */
10187 static inline unsigned int
10188 plt_stub_pad (struct ppc_link_hash_table *htab,
10189 struct ppc_stub_hash_entry *stub_entry,
10190 bfd_vma plt_off)
10191 {
10192 int stub_align = 1 << htab->params->plt_stub_align;
10193 unsigned stub_size = plt_stub_size (htab, stub_entry, plt_off);
10194 bfd_vma stub_off = stub_entry->stub_sec->size;
10195
10196 if (((stub_off + stub_size - 1) & -stub_align) - (stub_off & -stub_align)
10197 > (stub_size & -stub_align))
10198 return stub_align - (stub_off & (stub_align - 1));
10199 return 0;
10200 }
10201
10202 /* Build a .plt call stub. */
10203
10204 static inline bfd_byte *
10205 build_plt_stub (struct ppc_link_hash_table *htab,
10206 struct ppc_stub_hash_entry *stub_entry,
10207 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
10208 {
10209 bfd *obfd = htab->params->stub_bfd;
10210 bfd_boolean plt_load_toc = htab->opd_abi;
10211 bfd_boolean plt_static_chain = htab->params->plt_static_chain;
10212 bfd_boolean plt_thread_safe = htab->params->plt_thread_safe;
10213 bfd_boolean use_fake_dep = plt_thread_safe;
10214 bfd_vma cmp_branch_off = 0;
10215
10216 if (!ALWAYS_USE_FAKE_DEP
10217 && plt_load_toc
10218 && plt_thread_safe
10219 && !(stub_entry->h != NULL
10220 && (stub_entry->h == htab->tls_get_addr_fd
10221 || stub_entry->h == htab->tls_get_addr)
10222 && !htab->params->no_tls_get_addr_opt))
10223 {
10224 bfd_vma pltoff = stub_entry->plt_ent->plt.offset & ~1;
10225 bfd_vma pltindex = ((pltoff - PLT_INITIAL_ENTRY_SIZE (htab))
10226 / PLT_ENTRY_SIZE (htab));
10227 bfd_vma glinkoff = GLINK_CALL_STUB_SIZE + pltindex * 8;
10228 bfd_vma to, from;
10229
10230 if (pltindex > 32768)
10231 glinkoff += (pltindex - 32768) * 4;
10232 to = (glinkoff
10233 + htab->glink->output_offset
10234 + htab->glink->output_section->vma);
10235 from = (p - stub_entry->stub_sec->contents
10236 + 4 * (ALWAYS_EMIT_R2SAVE
10237 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10238 + 4 * (PPC_HA (offset) != 0)
10239 + 4 * (PPC_HA (offset + 8 + 8 * plt_static_chain)
10240 != PPC_HA (offset))
10241 + 4 * (plt_static_chain != 0)
10242 + 20
10243 + stub_entry->stub_sec->output_offset
10244 + stub_entry->stub_sec->output_section->vma);
10245 cmp_branch_off = to - from;
10246 use_fake_dep = cmp_branch_off + (1 << 25) >= (1 << 26);
10247 }
10248
10249 if (PPC_HA (offset) != 0)
10250 {
10251 if (r != NULL)
10252 {
10253 if (ALWAYS_EMIT_R2SAVE
10254 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10255 r[0].r_offset += 4;
10256 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
10257 r[1].r_offset = r[0].r_offset + 4;
10258 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10259 r[1].r_addend = r[0].r_addend;
10260 if (plt_load_toc)
10261 {
10262 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10263 {
10264 r[2].r_offset = r[1].r_offset + 4;
10265 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO);
10266 r[2].r_addend = r[0].r_addend;
10267 }
10268 else
10269 {
10270 r[2].r_offset = r[1].r_offset + 8 + 8 * use_fake_dep;
10271 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10272 r[2].r_addend = r[0].r_addend + 8;
10273 if (plt_static_chain)
10274 {
10275 r[3].r_offset = r[2].r_offset + 4;
10276 r[3].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10277 r[3].r_addend = r[0].r_addend + 16;
10278 }
10279 }
10280 }
10281 }
10282 if (ALWAYS_EMIT_R2SAVE
10283 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10284 bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p), p += 4;
10285 if (plt_load_toc)
10286 {
10287 bfd_put_32 (obfd, ADDIS_R11_R2 | PPC_HA (offset), p), p += 4;
10288 bfd_put_32 (obfd, LD_R12_0R11 | PPC_LO (offset), p), p += 4;
10289 }
10290 else
10291 {
10292 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
10293 bfd_put_32 (obfd, LD_R12_0R12 | PPC_LO (offset), p), p += 4;
10294 }
10295 if (plt_load_toc
10296 && PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10297 {
10298 bfd_put_32 (obfd, ADDI_R11_R11 | PPC_LO (offset), p), p += 4;
10299 offset = 0;
10300 }
10301 bfd_put_32 (obfd, MTCTR_R12, p), p += 4;
10302 if (plt_load_toc)
10303 {
10304 if (use_fake_dep)
10305 {
10306 bfd_put_32 (obfd, XOR_R2_R12_R12, p), p += 4;
10307 bfd_put_32 (obfd, ADD_R11_R11_R2, p), p += 4;
10308 }
10309 bfd_put_32 (obfd, LD_R2_0R11 | PPC_LO (offset + 8), p), p += 4;
10310 if (plt_static_chain)
10311 bfd_put_32 (obfd, LD_R11_0R11 | PPC_LO (offset + 16), p), p += 4;
10312 }
10313 }
10314 else
10315 {
10316 if (r != NULL)
10317 {
10318 if (ALWAYS_EMIT_R2SAVE
10319 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10320 r[0].r_offset += 4;
10321 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10322 if (plt_load_toc)
10323 {
10324 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10325 {
10326 r[1].r_offset = r[0].r_offset + 4;
10327 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16);
10328 r[1].r_addend = r[0].r_addend;
10329 }
10330 else
10331 {
10332 r[1].r_offset = r[0].r_offset + 8 + 8 * use_fake_dep;
10333 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10334 r[1].r_addend = r[0].r_addend + 8 + 8 * plt_static_chain;
10335 if (plt_static_chain)
10336 {
10337 r[2].r_offset = r[1].r_offset + 4;
10338 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10339 r[2].r_addend = r[0].r_addend + 8;
10340 }
10341 }
10342 }
10343 }
10344 if (ALWAYS_EMIT_R2SAVE
10345 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10346 bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p), p += 4;
10347 bfd_put_32 (obfd, LD_R12_0R2 | PPC_LO (offset), p), p += 4;
10348 if (plt_load_toc
10349 && PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10350 {
10351 bfd_put_32 (obfd, ADDI_R2_R2 | PPC_LO (offset), p), p += 4;
10352 offset = 0;
10353 }
10354 bfd_put_32 (obfd, MTCTR_R12, p), p += 4;
10355 if (plt_load_toc)
10356 {
10357 if (use_fake_dep)
10358 {
10359 bfd_put_32 (obfd, XOR_R11_R12_R12, p), p += 4;
10360 bfd_put_32 (obfd, ADD_R2_R2_R11, p), p += 4;
10361 }
10362 if (plt_static_chain)
10363 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset + 16), p), p += 4;
10364 bfd_put_32 (obfd, LD_R2_0R2 | PPC_LO (offset + 8), p), p += 4;
10365 }
10366 }
10367 if (plt_load_toc && plt_thread_safe && !use_fake_dep)
10368 {
10369 bfd_put_32 (obfd, CMPLDI_R2_0, p), p += 4;
10370 bfd_put_32 (obfd, BNECTR_P4, p), p += 4;
10371 bfd_put_32 (obfd, B_DOT | (cmp_branch_off & 0x3fffffc), p), p += 4;
10372 }
10373 else
10374 bfd_put_32 (obfd, BCTR, p), p += 4;
10375 return p;
10376 }
10377
10378 /* Build a special .plt call stub for __tls_get_addr. */
10379
10380 #define LD_R11_0R3 0xe9630000
10381 #define LD_R12_0R3 0xe9830000
10382 #define MR_R0_R3 0x7c601b78
10383 #define CMPDI_R11_0 0x2c2b0000
10384 #define ADD_R3_R12_R13 0x7c6c6a14
10385 #define BEQLR 0x4d820020
10386 #define MR_R3_R0 0x7c030378
10387 #define STD_R11_0R1 0xf9610000
10388 #define BCTRL 0x4e800421
10389 #define LD_R11_0R1 0xe9610000
10390 #define MTLR_R11 0x7d6803a6
10391
10392 static inline bfd_byte *
10393 build_tls_get_addr_stub (struct ppc_link_hash_table *htab,
10394 struct ppc_stub_hash_entry *stub_entry,
10395 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
10396 {
10397 bfd *obfd = htab->params->stub_bfd;
10398
10399 bfd_put_32 (obfd, LD_R11_0R3 + 0, p), p += 4;
10400 bfd_put_32 (obfd, LD_R12_0R3 + 8, p), p += 4;
10401 bfd_put_32 (obfd, MR_R0_R3, p), p += 4;
10402 bfd_put_32 (obfd, CMPDI_R11_0, p), p += 4;
10403 bfd_put_32 (obfd, ADD_R3_R12_R13, p), p += 4;
10404 bfd_put_32 (obfd, BEQLR, p), p += 4;
10405 bfd_put_32 (obfd, MR_R3_R0, p), p += 4;
10406 bfd_put_32 (obfd, MFLR_R11, p), p += 4;
10407 bfd_put_32 (obfd, STD_R11_0R1 + STK_LINKER (htab), p), p += 4;
10408
10409 if (r != NULL)
10410 r[0].r_offset += 9 * 4;
10411 p = build_plt_stub (htab, stub_entry, p, offset, r);
10412 bfd_put_32 (obfd, BCTRL, p - 4);
10413
10414 bfd_put_32 (obfd, LD_R11_0R1 + STK_LINKER (htab), p), p += 4;
10415 bfd_put_32 (obfd, LD_R2_0R1 + STK_TOC (htab), p), p += 4;
10416 bfd_put_32 (obfd, MTLR_R11, p), p += 4;
10417 bfd_put_32 (obfd, BLR, p), p += 4;
10418
10419 return p;
10420 }
10421
10422 static Elf_Internal_Rela *
10423 get_relocs (asection *sec, int count)
10424 {
10425 Elf_Internal_Rela *relocs;
10426 struct bfd_elf_section_data *elfsec_data;
10427
10428 elfsec_data = elf_section_data (sec);
10429 relocs = elfsec_data->relocs;
10430 if (relocs == NULL)
10431 {
10432 bfd_size_type relsize;
10433 relsize = sec->reloc_count * sizeof (*relocs);
10434 relocs = bfd_alloc (sec->owner, relsize);
10435 if (relocs == NULL)
10436 return NULL;
10437 elfsec_data->relocs = relocs;
10438 elfsec_data->rela.hdr = bfd_zalloc (sec->owner,
10439 sizeof (Elf_Internal_Shdr));
10440 if (elfsec_data->rela.hdr == NULL)
10441 return NULL;
10442 elfsec_data->rela.hdr->sh_size = (sec->reloc_count
10443 * sizeof (Elf64_External_Rela));
10444 elfsec_data->rela.hdr->sh_entsize = sizeof (Elf64_External_Rela);
10445 sec->reloc_count = 0;
10446 }
10447 relocs += sec->reloc_count;
10448 sec->reloc_count += count;
10449 return relocs;
10450 }
10451
10452 static bfd_vma
10453 get_r2off (struct bfd_link_info *info,
10454 struct ppc_stub_hash_entry *stub_entry)
10455 {
10456 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10457 bfd_vma r2off = htab->stub_group[stub_entry->target_section->id].toc_off;
10458
10459 if (r2off == 0)
10460 {
10461 /* Support linking -R objects. Get the toc pointer from the
10462 opd entry. */
10463 char buf[8];
10464 if (!htab->opd_abi)
10465 return r2off;
10466 asection *opd = stub_entry->h->elf.root.u.def.section;
10467 bfd_vma opd_off = stub_entry->h->elf.root.u.def.value;
10468
10469 if (strcmp (opd->name, ".opd") != 0
10470 || opd->reloc_count != 0)
10471 {
10472 info->callbacks->einfo (_("%P: cannot find opd entry toc for `%T'\n"),
10473 stub_entry->h->elf.root.root.string);
10474 bfd_set_error (bfd_error_bad_value);
10475 return 0;
10476 }
10477 if (!bfd_get_section_contents (opd->owner, opd, buf, opd_off + 8, 8))
10478 return 0;
10479 r2off = bfd_get_64 (opd->owner, buf);
10480 r2off -= elf_gp (info->output_bfd);
10481 }
10482 r2off -= htab->stub_group[stub_entry->id_sec->id].toc_off;
10483 return r2off;
10484 }
10485
10486 static bfd_boolean
10487 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
10488 {
10489 struct ppc_stub_hash_entry *stub_entry;
10490 struct ppc_branch_hash_entry *br_entry;
10491 struct bfd_link_info *info;
10492 struct ppc_link_hash_table *htab;
10493 bfd_byte *loc;
10494 bfd_byte *p;
10495 bfd_vma dest, off;
10496 int size;
10497 Elf_Internal_Rela *r;
10498 asection *plt;
10499
10500 /* Massage our args to the form they really have. */
10501 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
10502 info = in_arg;
10503
10504 htab = ppc_hash_table (info);
10505 if (htab == NULL)
10506 return FALSE;
10507
10508 /* Make a note of the offset within the stubs for this entry. */
10509 stub_entry->stub_offset = stub_entry->stub_sec->size;
10510 loc = stub_entry->stub_sec->contents + stub_entry->stub_offset;
10511
10512 htab->stub_count[stub_entry->stub_type - 1] += 1;
10513 switch (stub_entry->stub_type)
10514 {
10515 case ppc_stub_long_branch:
10516 case ppc_stub_long_branch_r2off:
10517 /* Branches are relative. This is where we are going to. */
10518 dest = (stub_entry->target_value
10519 + stub_entry->target_section->output_offset
10520 + stub_entry->target_section->output_section->vma);
10521 dest += PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
10522 off = dest;
10523
10524 /* And this is where we are coming from. */
10525 off -= (stub_entry->stub_offset
10526 + stub_entry->stub_sec->output_offset
10527 + stub_entry->stub_sec->output_section->vma);
10528
10529 size = 4;
10530 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
10531 {
10532 bfd_vma r2off = get_r2off (info, stub_entry);
10533
10534 if (r2off == 0)
10535 {
10536 htab->stub_error = TRUE;
10537 return FALSE;
10538 }
10539 bfd_put_32 (htab->params->stub_bfd, STD_R2_0R1 + STK_TOC (htab), loc);
10540 loc += 4;
10541 size = 12;
10542 if (PPC_HA (r2off) != 0)
10543 {
10544 size = 16;
10545 bfd_put_32 (htab->params->stub_bfd,
10546 ADDIS_R2_R2 | PPC_HA (r2off), loc);
10547 loc += 4;
10548 }
10549 bfd_put_32 (htab->params->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
10550 loc += 4;
10551 off -= size - 4;
10552 }
10553 bfd_put_32 (htab->params->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
10554
10555 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
10556 {
10557 info->callbacks->einfo
10558 (_("%P: long branch stub `%s' offset overflow\n"),
10559 stub_entry->root.string);
10560 htab->stub_error = TRUE;
10561 return FALSE;
10562 }
10563
10564 if (info->emitrelocations)
10565 {
10566 r = get_relocs (stub_entry->stub_sec, 1);
10567 if (r == NULL)
10568 return FALSE;
10569 r->r_offset = loc - stub_entry->stub_sec->contents;
10570 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
10571 r->r_addend = dest;
10572 if (stub_entry->h != NULL)
10573 {
10574 struct elf_link_hash_entry **hashes;
10575 unsigned long symndx;
10576 struct ppc_link_hash_entry *h;
10577
10578 hashes = elf_sym_hashes (htab->params->stub_bfd);
10579 if (hashes == NULL)
10580 {
10581 bfd_size_type hsize;
10582
10583 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
10584 hashes = bfd_zalloc (htab->params->stub_bfd, hsize);
10585 if (hashes == NULL)
10586 return FALSE;
10587 elf_sym_hashes (htab->params->stub_bfd) = hashes;
10588 htab->stub_globals = 1;
10589 }
10590 symndx = htab->stub_globals++;
10591 h = stub_entry->h;
10592 hashes[symndx] = &h->elf;
10593 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
10594 if (h->oh != NULL && h->oh->is_func)
10595 h = ppc_follow_link (h->oh);
10596 if (h->elf.root.u.def.section != stub_entry->target_section)
10597 /* H is an opd symbol. The addend must be zero. */
10598 r->r_addend = 0;
10599 else
10600 {
10601 off = (h->elf.root.u.def.value
10602 + h->elf.root.u.def.section->output_offset
10603 + h->elf.root.u.def.section->output_section->vma);
10604 r->r_addend -= off;
10605 }
10606 }
10607 }
10608 break;
10609
10610 case ppc_stub_plt_branch:
10611 case ppc_stub_plt_branch_r2off:
10612 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
10613 stub_entry->root.string + 9,
10614 FALSE, FALSE);
10615 if (br_entry == NULL)
10616 {
10617 info->callbacks->einfo (_("%P: can't find branch stub `%s'\n"),
10618 stub_entry->root.string);
10619 htab->stub_error = TRUE;
10620 return FALSE;
10621 }
10622
10623 dest = (stub_entry->target_value
10624 + stub_entry->target_section->output_offset
10625 + stub_entry->target_section->output_section->vma);
10626 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
10627 dest += PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
10628
10629 bfd_put_64 (htab->brlt->owner, dest,
10630 htab->brlt->contents + br_entry->offset);
10631
10632 if (br_entry->iter == htab->stub_iteration)
10633 {
10634 br_entry->iter = 0;
10635
10636 if (htab->relbrlt != NULL)
10637 {
10638 /* Create a reloc for the branch lookup table entry. */
10639 Elf_Internal_Rela rela;
10640 bfd_byte *rl;
10641
10642 rela.r_offset = (br_entry->offset
10643 + htab->brlt->output_offset
10644 + htab->brlt->output_section->vma);
10645 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
10646 rela.r_addend = dest;
10647
10648 rl = htab->relbrlt->contents;
10649 rl += (htab->relbrlt->reloc_count++
10650 * sizeof (Elf64_External_Rela));
10651 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
10652 }
10653 else if (info->emitrelocations)
10654 {
10655 r = get_relocs (htab->brlt, 1);
10656 if (r == NULL)
10657 return FALSE;
10658 /* brlt, being SEC_LINKER_CREATED does not go through the
10659 normal reloc processing. Symbols and offsets are not
10660 translated from input file to output file form, so
10661 set up the offset per the output file. */
10662 r->r_offset = (br_entry->offset
10663 + htab->brlt->output_offset
10664 + htab->brlt->output_section->vma);
10665 r->r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
10666 r->r_addend = dest;
10667 }
10668 }
10669
10670 dest = (br_entry->offset
10671 + htab->brlt->output_offset
10672 + htab->brlt->output_section->vma);
10673
10674 off = (dest
10675 - elf_gp (htab->brlt->output_section->owner)
10676 - htab->stub_group[stub_entry->id_sec->id].toc_off);
10677
10678 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
10679 {
10680 info->callbacks->einfo
10681 (_("%P: linkage table error against `%T'\n"),
10682 stub_entry->root.string);
10683 bfd_set_error (bfd_error_bad_value);
10684 htab->stub_error = TRUE;
10685 return FALSE;
10686 }
10687
10688 if (info->emitrelocations)
10689 {
10690 r = get_relocs (stub_entry->stub_sec, 1 + (PPC_HA (off) != 0));
10691 if (r == NULL)
10692 return FALSE;
10693 r[0].r_offset = loc - stub_entry->stub_sec->contents;
10694 if (bfd_big_endian (info->output_bfd))
10695 r[0].r_offset += 2;
10696 if (stub_entry->stub_type == ppc_stub_plt_branch_r2off)
10697 r[0].r_offset += 4;
10698 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10699 r[0].r_addend = dest;
10700 if (PPC_HA (off) != 0)
10701 {
10702 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
10703 r[1].r_offset = r[0].r_offset + 4;
10704 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10705 r[1].r_addend = r[0].r_addend;
10706 }
10707 }
10708
10709 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
10710 {
10711 if (PPC_HA (off) != 0)
10712 {
10713 size = 16;
10714 bfd_put_32 (htab->params->stub_bfd,
10715 ADDIS_R12_R2 | PPC_HA (off), loc);
10716 loc += 4;
10717 bfd_put_32 (htab->params->stub_bfd,
10718 LD_R12_0R12 | PPC_LO (off), loc);
10719 }
10720 else
10721 {
10722 size = 12;
10723 bfd_put_32 (htab->params->stub_bfd,
10724 LD_R12_0R2 | PPC_LO (off), loc);
10725 }
10726 }
10727 else
10728 {
10729 bfd_vma r2off = get_r2off (info, stub_entry);
10730
10731 if (r2off == 0 && htab->opd_abi)
10732 {
10733 htab->stub_error = TRUE;
10734 return FALSE;
10735 }
10736
10737 bfd_put_32 (htab->params->stub_bfd, STD_R2_0R1 + STK_TOC (htab), loc);
10738 loc += 4;
10739 size = 16;
10740 if (PPC_HA (off) != 0)
10741 {
10742 size += 4;
10743 bfd_put_32 (htab->params->stub_bfd,
10744 ADDIS_R12_R2 | PPC_HA (off), loc);
10745 loc += 4;
10746 bfd_put_32 (htab->params->stub_bfd,
10747 LD_R12_0R12 | PPC_LO (off), loc);
10748 }
10749 else
10750 bfd_put_32 (htab->params->stub_bfd, LD_R12_0R2 | PPC_LO (off), loc);
10751
10752 if (PPC_HA (r2off) != 0)
10753 {
10754 size += 4;
10755 loc += 4;
10756 bfd_put_32 (htab->params->stub_bfd,
10757 ADDIS_R2_R2 | PPC_HA (r2off), loc);
10758 }
10759 if (PPC_LO (r2off) != 0)
10760 {
10761 size += 4;
10762 loc += 4;
10763 bfd_put_32 (htab->params->stub_bfd,
10764 ADDI_R2_R2 | PPC_LO (r2off), loc);
10765 }
10766 }
10767 loc += 4;
10768 bfd_put_32 (htab->params->stub_bfd, MTCTR_R12, loc);
10769 loc += 4;
10770 bfd_put_32 (htab->params->stub_bfd, BCTR, loc);
10771 break;
10772
10773 case ppc_stub_plt_call:
10774 case ppc_stub_plt_call_r2save:
10775 if (stub_entry->h != NULL
10776 && stub_entry->h->is_func_descriptor
10777 && stub_entry->h->oh != NULL)
10778 {
10779 struct ppc_link_hash_entry *fh = ppc_follow_link (stub_entry->h->oh);
10780
10781 /* If the old-ABI "dot-symbol" is undefined make it weak so
10782 we don't get a link error from RELOC_FOR_GLOBAL_SYMBOL.
10783 FIXME: We used to define the symbol on one of the call
10784 stubs instead, which is why we test symbol section id
10785 against htab->top_id in various places. Likely all
10786 these checks could now disappear. */
10787 if (fh->elf.root.type == bfd_link_hash_undefined)
10788 fh->elf.root.type = bfd_link_hash_undefweak;
10789 /* Stop undo_symbol_twiddle changing it back to undefined. */
10790 fh->was_undefined = 0;
10791 }
10792
10793 /* Now build the stub. */
10794 dest = stub_entry->plt_ent->plt.offset & ~1;
10795 if (dest >= (bfd_vma) -2)
10796 abort ();
10797
10798 plt = htab->elf.splt;
10799 if (!htab->elf.dynamic_sections_created
10800 || stub_entry->h == NULL
10801 || stub_entry->h->elf.dynindx == -1)
10802 plt = htab->elf.iplt;
10803
10804 dest += plt->output_offset + plt->output_section->vma;
10805
10806 if (stub_entry->h == NULL
10807 && (stub_entry->plt_ent->plt.offset & 1) == 0)
10808 {
10809 Elf_Internal_Rela rela;
10810 bfd_byte *rl;
10811
10812 rela.r_offset = dest;
10813 if (htab->opd_abi)
10814 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
10815 else
10816 rela.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
10817 rela.r_addend = (stub_entry->target_value
10818 + stub_entry->target_section->output_offset
10819 + stub_entry->target_section->output_section->vma);
10820
10821 rl = (htab->elf.irelplt->contents
10822 + (htab->elf.irelplt->reloc_count++
10823 * sizeof (Elf64_External_Rela)));
10824 bfd_elf64_swap_reloca_out (info->output_bfd, &rela, rl);
10825 stub_entry->plt_ent->plt.offset |= 1;
10826 }
10827
10828 off = (dest
10829 - elf_gp (plt->output_section->owner)
10830 - htab->stub_group[stub_entry->id_sec->id].toc_off);
10831
10832 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
10833 {
10834 info->callbacks->einfo
10835 (_("%P: linkage table error against `%T'\n"),
10836 stub_entry->h != NULL
10837 ? stub_entry->h->elf.root.root.string
10838 : "<local sym>");
10839 bfd_set_error (bfd_error_bad_value);
10840 htab->stub_error = TRUE;
10841 return FALSE;
10842 }
10843
10844 if (htab->params->plt_stub_align != 0)
10845 {
10846 unsigned pad = plt_stub_pad (htab, stub_entry, off);
10847
10848 stub_entry->stub_sec->size += pad;
10849 stub_entry->stub_offset = stub_entry->stub_sec->size;
10850 loc += pad;
10851 }
10852
10853 r = NULL;
10854 if (info->emitrelocations)
10855 {
10856 r = get_relocs (stub_entry->stub_sec,
10857 ((PPC_HA (off) != 0)
10858 + (htab->opd_abi
10859 ? 2 + (htab->params->plt_static_chain
10860 && PPC_HA (off + 16) == PPC_HA (off))
10861 : 1)));
10862 if (r == NULL)
10863 return FALSE;
10864 r[0].r_offset = loc - stub_entry->stub_sec->contents;
10865 if (bfd_big_endian (info->output_bfd))
10866 r[0].r_offset += 2;
10867 r[0].r_addend = dest;
10868 }
10869 if (stub_entry->h != NULL
10870 && (stub_entry->h == htab->tls_get_addr_fd
10871 || stub_entry->h == htab->tls_get_addr)
10872 && !htab->params->no_tls_get_addr_opt)
10873 p = build_tls_get_addr_stub (htab, stub_entry, loc, off, r);
10874 else
10875 p = build_plt_stub (htab, stub_entry, loc, off, r);
10876 size = p - loc;
10877 break;
10878
10879 default:
10880 BFD_FAIL ();
10881 return FALSE;
10882 }
10883
10884 stub_entry->stub_sec->size += size;
10885
10886 if (htab->params->emit_stub_syms)
10887 {
10888 struct elf_link_hash_entry *h;
10889 size_t len1, len2;
10890 char *name;
10891 const char *const stub_str[] = { "long_branch",
10892 "long_branch_r2off",
10893 "plt_branch",
10894 "plt_branch_r2off",
10895 "plt_call",
10896 "plt_call" };
10897
10898 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
10899 len2 = strlen (stub_entry->root.string);
10900 name = bfd_malloc (len1 + len2 + 2);
10901 if (name == NULL)
10902 return FALSE;
10903 memcpy (name, stub_entry->root.string, 9);
10904 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
10905 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
10906 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
10907 if (h == NULL)
10908 return FALSE;
10909 if (h->root.type == bfd_link_hash_new)
10910 {
10911 h->root.type = bfd_link_hash_defined;
10912 h->root.u.def.section = stub_entry->stub_sec;
10913 h->root.u.def.value = stub_entry->stub_offset;
10914 h->ref_regular = 1;
10915 h->def_regular = 1;
10916 h->ref_regular_nonweak = 1;
10917 h->forced_local = 1;
10918 h->non_elf = 0;
10919 }
10920 }
10921
10922 return TRUE;
10923 }
10924
10925 /* As above, but don't actually build the stub. Just bump offset so
10926 we know stub section sizes, and select plt_branch stubs where
10927 long_branch stubs won't do. */
10928
10929 static bfd_boolean
10930 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
10931 {
10932 struct ppc_stub_hash_entry *stub_entry;
10933 struct bfd_link_info *info;
10934 struct ppc_link_hash_table *htab;
10935 bfd_vma off;
10936 int size;
10937
10938 /* Massage our args to the form they really have. */
10939 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
10940 info = in_arg;
10941
10942 htab = ppc_hash_table (info);
10943 if (htab == NULL)
10944 return FALSE;
10945
10946 if (stub_entry->stub_type == ppc_stub_plt_call
10947 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10948 {
10949 asection *plt;
10950 off = stub_entry->plt_ent->plt.offset & ~(bfd_vma) 1;
10951 if (off >= (bfd_vma) -2)
10952 abort ();
10953 plt = htab->elf.splt;
10954 if (!htab->elf.dynamic_sections_created
10955 || stub_entry->h == NULL
10956 || stub_entry->h->elf.dynindx == -1)
10957 plt = htab->elf.iplt;
10958 off += (plt->output_offset
10959 + plt->output_section->vma
10960 - elf_gp (plt->output_section->owner)
10961 - htab->stub_group[stub_entry->id_sec->id].toc_off);
10962
10963 size = plt_stub_size (htab, stub_entry, off);
10964 if (htab->params->plt_stub_align)
10965 size += plt_stub_pad (htab, stub_entry, off);
10966 if (info->emitrelocations)
10967 {
10968 stub_entry->stub_sec->reloc_count
10969 += ((PPC_HA (off) != 0)
10970 + (htab->opd_abi
10971 ? 2 + (htab->params->plt_static_chain
10972 && PPC_HA (off + 16) == PPC_HA (off))
10973 : 1));
10974 stub_entry->stub_sec->flags |= SEC_RELOC;
10975 }
10976 }
10977 else
10978 {
10979 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
10980 variants. */
10981 bfd_vma r2off = 0;
10982 bfd_vma local_off = 0;
10983
10984 off = (stub_entry->target_value
10985 + stub_entry->target_section->output_offset
10986 + stub_entry->target_section->output_section->vma);
10987 off -= (stub_entry->stub_sec->size
10988 + stub_entry->stub_sec->output_offset
10989 + stub_entry->stub_sec->output_section->vma);
10990
10991 /* Reset the stub type from the plt variant in case we now
10992 can reach with a shorter stub. */
10993 if (stub_entry->stub_type >= ppc_stub_plt_branch)
10994 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
10995
10996 size = 4;
10997 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
10998 {
10999 r2off = get_r2off (info, stub_entry);
11000 if (r2off == 0 && htab->opd_abi)
11001 {
11002 htab->stub_error = TRUE;
11003 return FALSE;
11004 }
11005 size = 12;
11006 if (PPC_HA (r2off) != 0)
11007 size = 16;
11008 off -= size - 4;
11009 }
11010
11011 local_off = PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
11012
11013 /* If the branch offset if too big, use a ppc_stub_plt_branch.
11014 Do the same for -R objects without function descriptors. */
11015 if (off + (1 << 25) >= (bfd_vma) (1 << 26) - local_off
11016 || (stub_entry->stub_type == ppc_stub_long_branch_r2off
11017 && r2off == 0))
11018 {
11019 struct ppc_branch_hash_entry *br_entry;
11020
11021 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
11022 stub_entry->root.string + 9,
11023 TRUE, FALSE);
11024 if (br_entry == NULL)
11025 {
11026 info->callbacks->einfo (_("%P: can't build branch stub `%s'\n"),
11027 stub_entry->root.string);
11028 htab->stub_error = TRUE;
11029 return FALSE;
11030 }
11031
11032 if (br_entry->iter != htab->stub_iteration)
11033 {
11034 br_entry->iter = htab->stub_iteration;
11035 br_entry->offset = htab->brlt->size;
11036 htab->brlt->size += 8;
11037
11038 if (htab->relbrlt != NULL)
11039 htab->relbrlt->size += sizeof (Elf64_External_Rela);
11040 else if (info->emitrelocations)
11041 {
11042 htab->brlt->reloc_count += 1;
11043 htab->brlt->flags |= SEC_RELOC;
11044 }
11045 }
11046
11047 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
11048 off = (br_entry->offset
11049 + htab->brlt->output_offset
11050 + htab->brlt->output_section->vma
11051 - elf_gp (htab->brlt->output_section->owner)
11052 - htab->stub_group[stub_entry->id_sec->id].toc_off);
11053
11054 if (info->emitrelocations)
11055 {
11056 stub_entry->stub_sec->reloc_count += 1 + (PPC_HA (off) != 0);
11057 stub_entry->stub_sec->flags |= SEC_RELOC;
11058 }
11059
11060 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
11061 {
11062 size = 12;
11063 if (PPC_HA (off) != 0)
11064 size = 16;
11065 }
11066 else
11067 {
11068 size = 16;
11069 if (PPC_HA (off) != 0)
11070 size += 4;
11071
11072 if (PPC_HA (r2off) != 0)
11073 size += 4;
11074 if (PPC_LO (r2off) != 0)
11075 size += 4;
11076 }
11077 }
11078 else if (info->emitrelocations)
11079 {
11080 stub_entry->stub_sec->reloc_count += 1;
11081 stub_entry->stub_sec->flags |= SEC_RELOC;
11082 }
11083 }
11084
11085 stub_entry->stub_sec->size += size;
11086 return TRUE;
11087 }
11088
11089 /* Set up various things so that we can make a list of input sections
11090 for each output section included in the link. Returns -1 on error,
11091 0 when no stubs will be needed, and 1 on success. */
11092
11093 int
11094 ppc64_elf_setup_section_lists (struct bfd_link_info *info)
11095 {
11096 bfd *input_bfd;
11097 int top_id, top_index, id;
11098 asection *section;
11099 asection **input_list;
11100 bfd_size_type amt;
11101 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11102
11103 if (htab == NULL)
11104 return -1;
11105
11106 /* Find the top input section id. */
11107 for (input_bfd = info->input_bfds, top_id = 3;
11108 input_bfd != NULL;
11109 input_bfd = input_bfd->link.next)
11110 {
11111 for (section = input_bfd->sections;
11112 section != NULL;
11113 section = section->next)
11114 {
11115 if (top_id < section->id)
11116 top_id = section->id;
11117 }
11118 }
11119
11120 htab->top_id = top_id;
11121 amt = sizeof (struct map_stub) * (top_id + 1);
11122 htab->stub_group = bfd_zmalloc (amt);
11123 if (htab->stub_group == NULL)
11124 return -1;
11125
11126 /* Set toc_off for com, und, abs and ind sections. */
11127 for (id = 0; id < 3; id++)
11128 htab->stub_group[id].toc_off = TOC_BASE_OFF;
11129
11130 /* We can't use output_bfd->section_count here to find the top output
11131 section index as some sections may have been removed, and
11132 strip_excluded_output_sections doesn't renumber the indices. */
11133 for (section = info->output_bfd->sections, top_index = 0;
11134 section != NULL;
11135 section = section->next)
11136 {
11137 if (top_index < section->index)
11138 top_index = section->index;
11139 }
11140
11141 htab->top_index = top_index;
11142 amt = sizeof (asection *) * (top_index + 1);
11143 input_list = bfd_zmalloc (amt);
11144 htab->input_list = input_list;
11145 if (input_list == NULL)
11146 return -1;
11147
11148 return 1;
11149 }
11150
11151 /* Set up for first pass at multitoc partitioning. */
11152
11153 void
11154 ppc64_elf_start_multitoc_partition (struct bfd_link_info *info)
11155 {
11156 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11157
11158 htab->toc_curr = ppc64_elf_set_toc (info, info->output_bfd);
11159 htab->toc_bfd = NULL;
11160 htab->toc_first_sec = NULL;
11161 }
11162
11163 /* The linker repeatedly calls this function for each TOC input section
11164 and linker generated GOT section. Group input bfds such that the toc
11165 within a group is less than 64k in size. */
11166
11167 bfd_boolean
11168 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
11169 {
11170 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11171 bfd_vma addr, off, limit;
11172
11173 if (htab == NULL)
11174 return FALSE;
11175
11176 if (!htab->second_toc_pass)
11177 {
11178 /* Keep track of the first .toc or .got section for this input bfd. */
11179 bfd_boolean new_bfd = htab->toc_bfd != isec->owner;
11180
11181 if (new_bfd)
11182 {
11183 htab->toc_bfd = isec->owner;
11184 htab->toc_first_sec = isec;
11185 }
11186
11187 addr = isec->output_offset + isec->output_section->vma;
11188 off = addr - htab->toc_curr;
11189 limit = 0x80008000;
11190 if (ppc64_elf_tdata (isec->owner)->has_small_toc_reloc)
11191 limit = 0x10000;
11192 if (off + isec->size > limit)
11193 {
11194 addr = (htab->toc_first_sec->output_offset
11195 + htab->toc_first_sec->output_section->vma);
11196 htab->toc_curr = addr;
11197 }
11198
11199 /* toc_curr is the base address of this toc group. Set elf_gp
11200 for the input section to be the offset relative to the
11201 output toc base plus 0x8000. Making the input elf_gp an
11202 offset allows us to move the toc as a whole without
11203 recalculating input elf_gp. */
11204 off = htab->toc_curr - elf_gp (isec->output_section->owner);
11205 off += TOC_BASE_OFF;
11206
11207 /* Die if someone uses a linker script that doesn't keep input
11208 file .toc and .got together. */
11209 if (new_bfd
11210 && elf_gp (isec->owner) != 0
11211 && elf_gp (isec->owner) != off)
11212 return FALSE;
11213
11214 elf_gp (isec->owner) = off;
11215 return TRUE;
11216 }
11217
11218 /* During the second pass toc_first_sec points to the start of
11219 a toc group, and toc_curr is used to track the old elf_gp.
11220 We use toc_bfd to ensure we only look at each bfd once. */
11221 if (htab->toc_bfd == isec->owner)
11222 return TRUE;
11223 htab->toc_bfd = isec->owner;
11224
11225 if (htab->toc_first_sec == NULL
11226 || htab->toc_curr != elf_gp (isec->owner))
11227 {
11228 htab->toc_curr = elf_gp (isec->owner);
11229 htab->toc_first_sec = isec;
11230 }
11231 addr = (htab->toc_first_sec->output_offset
11232 + htab->toc_first_sec->output_section->vma);
11233 off = addr - elf_gp (isec->output_section->owner) + TOC_BASE_OFF;
11234 elf_gp (isec->owner) = off;
11235
11236 return TRUE;
11237 }
11238
11239 /* Called via elf_link_hash_traverse to merge GOT entries for global
11240 symbol H. */
11241
11242 static bfd_boolean
11243 merge_global_got (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
11244 {
11245 if (h->root.type == bfd_link_hash_indirect)
11246 return TRUE;
11247
11248 merge_got_entries (&h->got.glist);
11249
11250 return TRUE;
11251 }
11252
11253 /* Called via elf_link_hash_traverse to allocate GOT entries for global
11254 symbol H. */
11255
11256 static bfd_boolean
11257 reallocate_got (struct elf_link_hash_entry *h, void *inf)
11258 {
11259 struct got_entry *gent;
11260
11261 if (h->root.type == bfd_link_hash_indirect)
11262 return TRUE;
11263
11264 for (gent = h->got.glist; gent != NULL; gent = gent->next)
11265 if (!gent->is_indirect)
11266 allocate_got (h, (struct bfd_link_info *) inf, gent);
11267 return TRUE;
11268 }
11269
11270 /* Called on the first multitoc pass after the last call to
11271 ppc64_elf_next_toc_section. This function removes duplicate GOT
11272 entries. */
11273
11274 bfd_boolean
11275 ppc64_elf_layout_multitoc (struct bfd_link_info *info)
11276 {
11277 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11278 struct bfd *ibfd, *ibfd2;
11279 bfd_boolean done_something;
11280
11281 htab->multi_toc_needed = htab->toc_curr != elf_gp (info->output_bfd);
11282
11283 if (!htab->do_multi_toc)
11284 return FALSE;
11285
11286 /* Merge global sym got entries within a toc group. */
11287 elf_link_hash_traverse (&htab->elf, merge_global_got, info);
11288
11289 /* And tlsld_got. */
11290 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11291 {
11292 struct got_entry *ent, *ent2;
11293
11294 if (!is_ppc64_elf (ibfd))
11295 continue;
11296
11297 ent = ppc64_tlsld_got (ibfd);
11298 if (!ent->is_indirect
11299 && ent->got.offset != (bfd_vma) -1)
11300 {
11301 for (ibfd2 = ibfd->link.next; ibfd2 != NULL; ibfd2 = ibfd2->link.next)
11302 {
11303 if (!is_ppc64_elf (ibfd2))
11304 continue;
11305
11306 ent2 = ppc64_tlsld_got (ibfd2);
11307 if (!ent2->is_indirect
11308 && ent2->got.offset != (bfd_vma) -1
11309 && elf_gp (ibfd2) == elf_gp (ibfd))
11310 {
11311 ent2->is_indirect = TRUE;
11312 ent2->got.ent = ent;
11313 }
11314 }
11315 }
11316 }
11317
11318 /* Zap sizes of got sections. */
11319 htab->elf.irelplt->rawsize = htab->elf.irelplt->size;
11320 htab->elf.irelplt->size -= htab->got_reli_size;
11321 htab->got_reli_size = 0;
11322
11323 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11324 {
11325 asection *got, *relgot;
11326
11327 if (!is_ppc64_elf (ibfd))
11328 continue;
11329
11330 got = ppc64_elf_tdata (ibfd)->got;
11331 if (got != NULL)
11332 {
11333 got->rawsize = got->size;
11334 got->size = 0;
11335 relgot = ppc64_elf_tdata (ibfd)->relgot;
11336 relgot->rawsize = relgot->size;
11337 relgot->size = 0;
11338 }
11339 }
11340
11341 /* Now reallocate the got, local syms first. We don't need to
11342 allocate section contents again since we never increase size. */
11343 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11344 {
11345 struct got_entry **lgot_ents;
11346 struct got_entry **end_lgot_ents;
11347 struct plt_entry **local_plt;
11348 struct plt_entry **end_local_plt;
11349 unsigned char *lgot_masks;
11350 bfd_size_type locsymcount;
11351 Elf_Internal_Shdr *symtab_hdr;
11352 asection *s;
11353
11354 if (!is_ppc64_elf (ibfd))
11355 continue;
11356
11357 lgot_ents = elf_local_got_ents (ibfd);
11358 if (!lgot_ents)
11359 continue;
11360
11361 symtab_hdr = &elf_symtab_hdr (ibfd);
11362 locsymcount = symtab_hdr->sh_info;
11363 end_lgot_ents = lgot_ents + locsymcount;
11364 local_plt = (struct plt_entry **) end_lgot_ents;
11365 end_local_plt = local_plt + locsymcount;
11366 lgot_masks = (unsigned char *) end_local_plt;
11367 s = ppc64_elf_tdata (ibfd)->got;
11368 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
11369 {
11370 struct got_entry *ent;
11371
11372 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
11373 {
11374 unsigned int ent_size = 8;
11375 unsigned int rel_size = sizeof (Elf64_External_Rela);
11376
11377 ent->got.offset = s->size;
11378 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
11379 {
11380 ent_size *= 2;
11381 rel_size *= 2;
11382 }
11383 s->size += ent_size;
11384 if ((*lgot_masks & PLT_IFUNC) != 0)
11385 {
11386 htab->elf.irelplt->size += rel_size;
11387 htab->got_reli_size += rel_size;
11388 }
11389 else if (info->shared)
11390 {
11391 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
11392 srel->size += rel_size;
11393 }
11394 }
11395 }
11396 }
11397
11398 elf_link_hash_traverse (&htab->elf, reallocate_got, info);
11399
11400 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11401 {
11402 struct got_entry *ent;
11403
11404 if (!is_ppc64_elf (ibfd))
11405 continue;
11406
11407 ent = ppc64_tlsld_got (ibfd);
11408 if (!ent->is_indirect
11409 && ent->got.offset != (bfd_vma) -1)
11410 {
11411 asection *s = ppc64_elf_tdata (ibfd)->got;
11412 ent->got.offset = s->size;
11413 s->size += 16;
11414 if (info->shared)
11415 {
11416 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
11417 srel->size += sizeof (Elf64_External_Rela);
11418 }
11419 }
11420 }
11421
11422 done_something = htab->elf.irelplt->rawsize != htab->elf.irelplt->size;
11423 if (!done_something)
11424 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11425 {
11426 asection *got;
11427
11428 if (!is_ppc64_elf (ibfd))
11429 continue;
11430
11431 got = ppc64_elf_tdata (ibfd)->got;
11432 if (got != NULL)
11433 {
11434 done_something = got->rawsize != got->size;
11435 if (done_something)
11436 break;
11437 }
11438 }
11439
11440 if (done_something)
11441 (*htab->params->layout_sections_again) ();
11442
11443 /* Set up for second pass over toc sections to recalculate elf_gp
11444 on input sections. */
11445 htab->toc_bfd = NULL;
11446 htab->toc_first_sec = NULL;
11447 htab->second_toc_pass = TRUE;
11448 return done_something;
11449 }
11450
11451 /* Called after second pass of multitoc partitioning. */
11452
11453 void
11454 ppc64_elf_finish_multitoc_partition (struct bfd_link_info *info)
11455 {
11456 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11457
11458 /* After the second pass, toc_curr tracks the TOC offset used
11459 for code sections below in ppc64_elf_next_input_section. */
11460 htab->toc_curr = TOC_BASE_OFF;
11461 }
11462
11463 /* No toc references were found in ISEC. If the code in ISEC makes no
11464 calls, then there's no need to use toc adjusting stubs when branching
11465 into ISEC. Actually, indirect calls from ISEC are OK as they will
11466 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
11467 needed, and 2 if a cyclical call-graph was found but no other reason
11468 for a stub was detected. If called from the top level, a return of
11469 2 means the same as a return of 0. */
11470
11471 static int
11472 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
11473 {
11474 int ret;
11475
11476 /* Mark this section as checked. */
11477 isec->call_check_done = 1;
11478
11479 /* We know none of our code bearing sections will need toc stubs. */
11480 if ((isec->flags & SEC_LINKER_CREATED) != 0)
11481 return 0;
11482
11483 if (isec->size == 0)
11484 return 0;
11485
11486 if (isec->output_section == NULL)
11487 return 0;
11488
11489 ret = 0;
11490 if (isec->reloc_count != 0)
11491 {
11492 Elf_Internal_Rela *relstart, *rel;
11493 Elf_Internal_Sym *local_syms;
11494 struct ppc_link_hash_table *htab;
11495
11496 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
11497 info->keep_memory);
11498 if (relstart == NULL)
11499 return -1;
11500
11501 /* Look for branches to outside of this section. */
11502 local_syms = NULL;
11503 htab = ppc_hash_table (info);
11504 if (htab == NULL)
11505 return -1;
11506
11507 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
11508 {
11509 enum elf_ppc64_reloc_type r_type;
11510 unsigned long r_symndx;
11511 struct elf_link_hash_entry *h;
11512 struct ppc_link_hash_entry *eh;
11513 Elf_Internal_Sym *sym;
11514 asection *sym_sec;
11515 struct _opd_sec_data *opd;
11516 bfd_vma sym_value;
11517 bfd_vma dest;
11518
11519 r_type = ELF64_R_TYPE (rel->r_info);
11520 if (r_type != R_PPC64_REL24
11521 && r_type != R_PPC64_REL14
11522 && r_type != R_PPC64_REL14_BRTAKEN
11523 && r_type != R_PPC64_REL14_BRNTAKEN)
11524 continue;
11525
11526 r_symndx = ELF64_R_SYM (rel->r_info);
11527 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
11528 isec->owner))
11529 {
11530 ret = -1;
11531 break;
11532 }
11533
11534 /* Calls to dynamic lib functions go through a plt call stub
11535 that uses r2. */
11536 eh = (struct ppc_link_hash_entry *) h;
11537 if (eh != NULL
11538 && (eh->elf.plt.plist != NULL
11539 || (eh->oh != NULL
11540 && ppc_follow_link (eh->oh)->elf.plt.plist != NULL)))
11541 {
11542 ret = 1;
11543 break;
11544 }
11545
11546 if (sym_sec == NULL)
11547 /* Ignore other undefined symbols. */
11548 continue;
11549
11550 /* Assume branches to other sections not included in the
11551 link need stubs too, to cover -R and absolute syms. */
11552 if (sym_sec->output_section == NULL)
11553 {
11554 ret = 1;
11555 break;
11556 }
11557
11558 if (h == NULL)
11559 sym_value = sym->st_value;
11560 else
11561 {
11562 if (h->root.type != bfd_link_hash_defined
11563 && h->root.type != bfd_link_hash_defweak)
11564 abort ();
11565 sym_value = h->root.u.def.value;
11566 }
11567 sym_value += rel->r_addend;
11568
11569 /* If this branch reloc uses an opd sym, find the code section. */
11570 opd = get_opd_info (sym_sec);
11571 if (opd != NULL)
11572 {
11573 if (h == NULL && opd->adjust != NULL)
11574 {
11575 long adjust;
11576
11577 adjust = opd->adjust[sym->st_value / 8];
11578 if (adjust == -1)
11579 /* Assume deleted functions won't ever be called. */
11580 continue;
11581 sym_value += adjust;
11582 }
11583
11584 dest = opd_entry_value (sym_sec, sym_value,
11585 &sym_sec, NULL, FALSE);
11586 if (dest == (bfd_vma) -1)
11587 continue;
11588 }
11589 else
11590 dest = (sym_value
11591 + sym_sec->output_offset
11592 + sym_sec->output_section->vma);
11593
11594 /* Ignore branch to self. */
11595 if (sym_sec == isec)
11596 continue;
11597
11598 /* If the called function uses the toc, we need a stub. */
11599 if (sym_sec->has_toc_reloc
11600 || sym_sec->makes_toc_func_call)
11601 {
11602 ret = 1;
11603 break;
11604 }
11605
11606 /* Assume any branch that needs a long branch stub might in fact
11607 need a plt_branch stub. A plt_branch stub uses r2. */
11608 else if (dest - (isec->output_offset
11609 + isec->output_section->vma
11610 + rel->r_offset) + (1 << 25)
11611 >= (2u << 25) - PPC64_LOCAL_ENTRY_OFFSET (h
11612 ? h->other
11613 : sym->st_other))
11614 {
11615 ret = 1;
11616 break;
11617 }
11618
11619 /* If calling back to a section in the process of being
11620 tested, we can't say for sure that no toc adjusting stubs
11621 are needed, so don't return zero. */
11622 else if (sym_sec->call_check_in_progress)
11623 ret = 2;
11624
11625 /* Branches to another section that itself doesn't have any TOC
11626 references are OK. Recursively call ourselves to check. */
11627 else if (!sym_sec->call_check_done)
11628 {
11629 int recur;
11630
11631 /* Mark current section as indeterminate, so that other
11632 sections that call back to current won't be marked as
11633 known. */
11634 isec->call_check_in_progress = 1;
11635 recur = toc_adjusting_stub_needed (info, sym_sec);
11636 isec->call_check_in_progress = 0;
11637
11638 if (recur != 0)
11639 {
11640 ret = recur;
11641 if (recur != 2)
11642 break;
11643 }
11644 }
11645 }
11646
11647 if (local_syms != NULL
11648 && (elf_symtab_hdr (isec->owner).contents
11649 != (unsigned char *) local_syms))
11650 free (local_syms);
11651 if (elf_section_data (isec)->relocs != relstart)
11652 free (relstart);
11653 }
11654
11655 if ((ret & 1) == 0
11656 && isec->map_head.s != NULL
11657 && (strcmp (isec->output_section->name, ".init") == 0
11658 || strcmp (isec->output_section->name, ".fini") == 0))
11659 {
11660 if (isec->map_head.s->has_toc_reloc
11661 || isec->map_head.s->makes_toc_func_call)
11662 ret = 1;
11663 else if (!isec->map_head.s->call_check_done)
11664 {
11665 int recur;
11666 isec->call_check_in_progress = 1;
11667 recur = toc_adjusting_stub_needed (info, isec->map_head.s);
11668 isec->call_check_in_progress = 0;
11669 if (recur != 0)
11670 ret = recur;
11671 }
11672 }
11673
11674 if (ret == 1)
11675 isec->makes_toc_func_call = 1;
11676
11677 return ret;
11678 }
11679
11680 /* The linker repeatedly calls this function for each input section,
11681 in the order that input sections are linked into output sections.
11682 Build lists of input sections to determine groupings between which
11683 we may insert linker stubs. */
11684
11685 bfd_boolean
11686 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
11687 {
11688 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11689
11690 if (htab == NULL)
11691 return FALSE;
11692
11693 if ((isec->output_section->flags & SEC_CODE) != 0
11694 && isec->output_section->index <= htab->top_index)
11695 {
11696 asection **list = htab->input_list + isec->output_section->index;
11697 /* Steal the link_sec pointer for our list. */
11698 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
11699 /* This happens to make the list in reverse order,
11700 which is what we want. */
11701 PREV_SEC (isec) = *list;
11702 *list = isec;
11703 }
11704
11705 if (htab->multi_toc_needed)
11706 {
11707 /* Analyse sections that aren't already flagged as needing a
11708 valid toc pointer. Exclude .fixup for the linux kernel.
11709 .fixup contains branches, but only back to the function that
11710 hit an exception. */
11711 if (!(isec->has_toc_reloc
11712 || (isec->flags & SEC_CODE) == 0
11713 || strcmp (isec->name, ".fixup") == 0
11714 || isec->call_check_done))
11715 {
11716 if (toc_adjusting_stub_needed (info, isec) < 0)
11717 return FALSE;
11718 }
11719 /* Make all sections use the TOC assigned for this object file.
11720 This will be wrong for pasted sections; We fix that in
11721 check_pasted_section(). */
11722 if (elf_gp (isec->owner) != 0)
11723 htab->toc_curr = elf_gp (isec->owner);
11724 }
11725
11726 htab->stub_group[isec->id].toc_off = htab->toc_curr;
11727 return TRUE;
11728 }
11729
11730 /* Check that all .init and .fini sections use the same toc, if they
11731 have toc relocs. */
11732
11733 static bfd_boolean
11734 check_pasted_section (struct bfd_link_info *info, const char *name)
11735 {
11736 asection *o = bfd_get_section_by_name (info->output_bfd, name);
11737
11738 if (o != NULL)
11739 {
11740 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11741 bfd_vma toc_off = 0;
11742 asection *i;
11743
11744 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
11745 if (i->has_toc_reloc)
11746 {
11747 if (toc_off == 0)
11748 toc_off = htab->stub_group[i->id].toc_off;
11749 else if (toc_off != htab->stub_group[i->id].toc_off)
11750 return FALSE;
11751 }
11752
11753 if (toc_off == 0)
11754 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
11755 if (i->makes_toc_func_call)
11756 {
11757 toc_off = htab->stub_group[i->id].toc_off;
11758 break;
11759 }
11760
11761 /* Make sure the whole pasted function uses the same toc offset. */
11762 if (toc_off != 0)
11763 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
11764 htab->stub_group[i->id].toc_off = toc_off;
11765 }
11766 return TRUE;
11767 }
11768
11769 bfd_boolean
11770 ppc64_elf_check_init_fini (struct bfd_link_info *info)
11771 {
11772 return (check_pasted_section (info, ".init")
11773 & check_pasted_section (info, ".fini"));
11774 }
11775
11776 /* See whether we can group stub sections together. Grouping stub
11777 sections may result in fewer stubs. More importantly, we need to
11778 put all .init* and .fini* stubs at the beginning of the .init or
11779 .fini output sections respectively, because glibc splits the
11780 _init and _fini functions into multiple parts. Putting a stub in
11781 the middle of a function is not a good idea. */
11782
11783 static void
11784 group_sections (struct ppc_link_hash_table *htab,
11785 bfd_size_type stub_group_size,
11786 bfd_boolean stubs_always_before_branch)
11787 {
11788 asection **list;
11789 bfd_size_type stub14_group_size;
11790 bfd_boolean suppress_size_errors;
11791
11792 suppress_size_errors = FALSE;
11793 stub14_group_size = stub_group_size;
11794 if (stub_group_size == 1)
11795 {
11796 /* Default values. */
11797 if (stubs_always_before_branch)
11798 {
11799 stub_group_size = 0x1e00000;
11800 stub14_group_size = 0x7800;
11801 }
11802 else
11803 {
11804 stub_group_size = 0x1c00000;
11805 stub14_group_size = 0x7000;
11806 }
11807 suppress_size_errors = TRUE;
11808 }
11809
11810 list = htab->input_list + htab->top_index;
11811 do
11812 {
11813 asection *tail = *list;
11814 while (tail != NULL)
11815 {
11816 asection *curr;
11817 asection *prev;
11818 bfd_size_type total;
11819 bfd_boolean big_sec;
11820 bfd_vma curr_toc;
11821
11822 curr = tail;
11823 total = tail->size;
11824 big_sec = total > (ppc64_elf_section_data (tail) != NULL
11825 && ppc64_elf_section_data (tail)->has_14bit_branch
11826 ? stub14_group_size : stub_group_size);
11827 if (big_sec && !suppress_size_errors)
11828 (*_bfd_error_handler) (_("%B section %A exceeds stub group size"),
11829 tail->owner, tail);
11830 curr_toc = htab->stub_group[tail->id].toc_off;
11831
11832 while ((prev = PREV_SEC (curr)) != NULL
11833 && ((total += curr->output_offset - prev->output_offset)
11834 < (ppc64_elf_section_data (prev) != NULL
11835 && ppc64_elf_section_data (prev)->has_14bit_branch
11836 ? stub14_group_size : stub_group_size))
11837 && htab->stub_group[prev->id].toc_off == curr_toc)
11838 curr = prev;
11839
11840 /* OK, the size from the start of CURR to the end is less
11841 than stub_group_size and thus can be handled by one stub
11842 section. (or the tail section is itself larger than
11843 stub_group_size, in which case we may be toast.) We
11844 should really be keeping track of the total size of stubs
11845 added here, as stubs contribute to the final output
11846 section size. That's a little tricky, and this way will
11847 only break if stubs added make the total size more than
11848 2^25, ie. for the default stub_group_size, if stubs total
11849 more than 2097152 bytes, or nearly 75000 plt call stubs. */
11850 do
11851 {
11852 prev = PREV_SEC (tail);
11853 /* Set up this stub group. */
11854 htab->stub_group[tail->id].link_sec = curr;
11855 }
11856 while (tail != curr && (tail = prev) != NULL);
11857
11858 /* But wait, there's more! Input sections up to stub_group_size
11859 bytes before the stub section can be handled by it too.
11860 Don't do this if we have a really large section after the
11861 stubs, as adding more stubs increases the chance that
11862 branches may not reach into the stub section. */
11863 if (!stubs_always_before_branch && !big_sec)
11864 {
11865 total = 0;
11866 while (prev != NULL
11867 && ((total += tail->output_offset - prev->output_offset)
11868 < (ppc64_elf_section_data (prev) != NULL
11869 && ppc64_elf_section_data (prev)->has_14bit_branch
11870 ? stub14_group_size : stub_group_size))
11871 && htab->stub_group[prev->id].toc_off == curr_toc)
11872 {
11873 tail = prev;
11874 prev = PREV_SEC (tail);
11875 htab->stub_group[tail->id].link_sec = curr;
11876 }
11877 }
11878 tail = prev;
11879 }
11880 }
11881 while (list-- != htab->input_list);
11882 free (htab->input_list);
11883 #undef PREV_SEC
11884 }
11885
11886 static const unsigned char glink_eh_frame_cie[] =
11887 {
11888 0, 0, 0, 16, /* length. */
11889 0, 0, 0, 0, /* id. */
11890 1, /* CIE version. */
11891 'z', 'R', 0, /* Augmentation string. */
11892 4, /* Code alignment. */
11893 0x78, /* Data alignment. */
11894 65, /* RA reg. */
11895 1, /* Augmentation size. */
11896 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
11897 DW_CFA_def_cfa, 1, 0, /* def_cfa: r1 offset 0. */
11898 0, 0, 0, 0
11899 };
11900
11901 /* Stripping output sections is normally done before dynamic section
11902 symbols have been allocated. This function is called later, and
11903 handles cases like htab->brlt which is mapped to its own output
11904 section. */
11905
11906 static void
11907 maybe_strip_output (struct bfd_link_info *info, asection *isec)
11908 {
11909 if (isec->size == 0
11910 && isec->output_section->size == 0
11911 && !(isec->output_section->flags & SEC_KEEP)
11912 && !bfd_section_removed_from_list (info->output_bfd,
11913 isec->output_section)
11914 && elf_section_data (isec->output_section)->dynindx == 0)
11915 {
11916 isec->output_section->flags |= SEC_EXCLUDE;
11917 bfd_section_list_remove (info->output_bfd, isec->output_section);
11918 info->output_bfd->section_count--;
11919 }
11920 }
11921
11922 /* Determine and set the size of the stub section for a final link.
11923
11924 The basic idea here is to examine all the relocations looking for
11925 PC-relative calls to a target that is unreachable with a "bl"
11926 instruction. */
11927
11928 bfd_boolean
11929 ppc64_elf_size_stubs (struct bfd_link_info *info)
11930 {
11931 bfd_size_type stub_group_size;
11932 bfd_boolean stubs_always_before_branch;
11933 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11934
11935 if (htab == NULL)
11936 return FALSE;
11937
11938 if (htab->params->plt_thread_safe == -1 && !info->executable)
11939 htab->params->plt_thread_safe = 1;
11940 if (!htab->opd_abi)
11941 htab->params->plt_thread_safe = 0;
11942 else if (htab->params->plt_thread_safe == -1)
11943 {
11944 static const char *const thread_starter[] =
11945 {
11946 "pthread_create",
11947 /* libstdc++ */
11948 "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE",
11949 /* librt */
11950 "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio",
11951 "mq_notify", "create_timer",
11952 /* libanl */
11953 "getaddrinfo_a",
11954 /* libgomp */
11955 "GOMP_parallel_start",
11956 "GOMP_parallel_loop_static_start",
11957 "GOMP_parallel_loop_dynamic_start",
11958 "GOMP_parallel_loop_guided_start",
11959 "GOMP_parallel_loop_runtime_start",
11960 "GOMP_parallel_sections_start",
11961 };
11962 unsigned i;
11963
11964 for (i = 0; i < sizeof (thread_starter)/ sizeof (thread_starter[0]); i++)
11965 {
11966 struct elf_link_hash_entry *h;
11967 h = elf_link_hash_lookup (&htab->elf, thread_starter[i],
11968 FALSE, FALSE, TRUE);
11969 htab->params->plt_thread_safe = h != NULL && h->ref_regular;
11970 if (htab->params->plt_thread_safe)
11971 break;
11972 }
11973 }
11974 stubs_always_before_branch = htab->params->group_size < 0;
11975 if (htab->params->group_size < 0)
11976 stub_group_size = -htab->params->group_size;
11977 else
11978 stub_group_size = htab->params->group_size;
11979
11980 group_sections (htab, stub_group_size, stubs_always_before_branch);
11981
11982 while (1)
11983 {
11984 bfd *input_bfd;
11985 unsigned int bfd_indx;
11986 asection *stub_sec;
11987
11988 htab->stub_iteration += 1;
11989
11990 for (input_bfd = info->input_bfds, bfd_indx = 0;
11991 input_bfd != NULL;
11992 input_bfd = input_bfd->link.next, bfd_indx++)
11993 {
11994 Elf_Internal_Shdr *symtab_hdr;
11995 asection *section;
11996 Elf_Internal_Sym *local_syms = NULL;
11997
11998 if (!is_ppc64_elf (input_bfd))
11999 continue;
12000
12001 /* We'll need the symbol table in a second. */
12002 symtab_hdr = &elf_symtab_hdr (input_bfd);
12003 if (symtab_hdr->sh_info == 0)
12004 continue;
12005
12006 /* Walk over each section attached to the input bfd. */
12007 for (section = input_bfd->sections;
12008 section != NULL;
12009 section = section->next)
12010 {
12011 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
12012
12013 /* If there aren't any relocs, then there's nothing more
12014 to do. */
12015 if ((section->flags & SEC_RELOC) == 0
12016 || (section->flags & SEC_ALLOC) == 0
12017 || (section->flags & SEC_LOAD) == 0
12018 || (section->flags & SEC_CODE) == 0
12019 || section->reloc_count == 0)
12020 continue;
12021
12022 /* If this section is a link-once section that will be
12023 discarded, then don't create any stubs. */
12024 if (section->output_section == NULL
12025 || section->output_section->owner != info->output_bfd)
12026 continue;
12027
12028 /* Get the relocs. */
12029 internal_relocs
12030 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
12031 info->keep_memory);
12032 if (internal_relocs == NULL)
12033 goto error_ret_free_local;
12034
12035 /* Now examine each relocation. */
12036 irela = internal_relocs;
12037 irelaend = irela + section->reloc_count;
12038 for (; irela < irelaend; irela++)
12039 {
12040 enum elf_ppc64_reloc_type r_type;
12041 unsigned int r_indx;
12042 enum ppc_stub_type stub_type;
12043 struct ppc_stub_hash_entry *stub_entry;
12044 asection *sym_sec, *code_sec;
12045 bfd_vma sym_value, code_value;
12046 bfd_vma destination;
12047 unsigned long local_off;
12048 bfd_boolean ok_dest;
12049 struct ppc_link_hash_entry *hash;
12050 struct ppc_link_hash_entry *fdh;
12051 struct elf_link_hash_entry *h;
12052 Elf_Internal_Sym *sym;
12053 char *stub_name;
12054 const asection *id_sec;
12055 struct _opd_sec_data *opd;
12056 struct plt_entry *plt_ent;
12057
12058 r_type = ELF64_R_TYPE (irela->r_info);
12059 r_indx = ELF64_R_SYM (irela->r_info);
12060
12061 if (r_type >= R_PPC64_max)
12062 {
12063 bfd_set_error (bfd_error_bad_value);
12064 goto error_ret_free_internal;
12065 }
12066
12067 /* Only look for stubs on branch instructions. */
12068 if (r_type != R_PPC64_REL24
12069 && r_type != R_PPC64_REL14
12070 && r_type != R_PPC64_REL14_BRTAKEN
12071 && r_type != R_PPC64_REL14_BRNTAKEN)
12072 continue;
12073
12074 /* Now determine the call target, its name, value,
12075 section. */
12076 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
12077 r_indx, input_bfd))
12078 goto error_ret_free_internal;
12079 hash = (struct ppc_link_hash_entry *) h;
12080
12081 ok_dest = FALSE;
12082 fdh = NULL;
12083 sym_value = 0;
12084 if (hash == NULL)
12085 {
12086 sym_value = sym->st_value;
12087 ok_dest = TRUE;
12088 }
12089 else if (hash->elf.root.type == bfd_link_hash_defined
12090 || hash->elf.root.type == bfd_link_hash_defweak)
12091 {
12092 sym_value = hash->elf.root.u.def.value;
12093 if (sym_sec->output_section != NULL)
12094 ok_dest = TRUE;
12095 }
12096 else if (hash->elf.root.type == bfd_link_hash_undefweak
12097 || hash->elf.root.type == bfd_link_hash_undefined)
12098 {
12099 /* Recognise an old ABI func code entry sym, and
12100 use the func descriptor sym instead if it is
12101 defined. */
12102 if (hash->elf.root.root.string[0] == '.'
12103 && (fdh = lookup_fdh (hash, htab)) != NULL)
12104 {
12105 if (fdh->elf.root.type == bfd_link_hash_defined
12106 || fdh->elf.root.type == bfd_link_hash_defweak)
12107 {
12108 sym_sec = fdh->elf.root.u.def.section;
12109 sym_value = fdh->elf.root.u.def.value;
12110 if (sym_sec->output_section != NULL)
12111 ok_dest = TRUE;
12112 }
12113 else
12114 fdh = NULL;
12115 }
12116 }
12117 else
12118 {
12119 bfd_set_error (bfd_error_bad_value);
12120 goto error_ret_free_internal;
12121 }
12122
12123 destination = 0;
12124 local_off = 0;
12125 if (ok_dest)
12126 {
12127 sym_value += irela->r_addend;
12128 destination = (sym_value
12129 + sym_sec->output_offset
12130 + sym_sec->output_section->vma);
12131 local_off = PPC64_LOCAL_ENTRY_OFFSET (hash
12132 ? hash->elf.other
12133 : sym->st_other);
12134 }
12135
12136 code_sec = sym_sec;
12137 code_value = sym_value;
12138 opd = get_opd_info (sym_sec);
12139 if (opd != NULL)
12140 {
12141 bfd_vma dest;
12142
12143 if (hash == NULL && opd->adjust != NULL)
12144 {
12145 long adjust = opd->adjust[sym_value / 8];
12146 if (adjust == -1)
12147 continue;
12148 code_value += adjust;
12149 sym_value += adjust;
12150 }
12151 dest = opd_entry_value (sym_sec, sym_value,
12152 &code_sec, &code_value, FALSE);
12153 if (dest != (bfd_vma) -1)
12154 {
12155 destination = dest;
12156 if (fdh != NULL)
12157 {
12158 /* Fixup old ABI sym to point at code
12159 entry. */
12160 hash->elf.root.type = bfd_link_hash_defweak;
12161 hash->elf.root.u.def.section = code_sec;
12162 hash->elf.root.u.def.value = code_value;
12163 }
12164 }
12165 }
12166
12167 /* Determine what (if any) linker stub is needed. */
12168 plt_ent = NULL;
12169 stub_type = ppc_type_of_stub (section, irela, &hash,
12170 &plt_ent, destination,
12171 local_off);
12172
12173 if (stub_type != ppc_stub_plt_call)
12174 {
12175 /* Check whether we need a TOC adjusting stub.
12176 Since the linker pastes together pieces from
12177 different object files when creating the
12178 _init and _fini functions, it may be that a
12179 call to what looks like a local sym is in
12180 fact a call needing a TOC adjustment. */
12181 if (code_sec != NULL
12182 && code_sec->output_section != NULL
12183 && (htab->stub_group[code_sec->id].toc_off
12184 != htab->stub_group[section->id].toc_off)
12185 && (code_sec->has_toc_reloc
12186 || code_sec->makes_toc_func_call))
12187 stub_type = ppc_stub_long_branch_r2off;
12188 }
12189
12190 if (stub_type == ppc_stub_none)
12191 continue;
12192
12193 /* __tls_get_addr calls might be eliminated. */
12194 if (stub_type != ppc_stub_plt_call
12195 && hash != NULL
12196 && (hash == htab->tls_get_addr
12197 || hash == htab->tls_get_addr_fd)
12198 && section->has_tls_reloc
12199 && irela != internal_relocs)
12200 {
12201 /* Get tls info. */
12202 unsigned char *tls_mask;
12203
12204 if (!get_tls_mask (&tls_mask, NULL, NULL, &local_syms,
12205 irela - 1, input_bfd))
12206 goto error_ret_free_internal;
12207 if (*tls_mask != 0)
12208 continue;
12209 }
12210
12211 if (stub_type == ppc_stub_plt_call
12212 && irela + 1 < irelaend
12213 && irela[1].r_offset == irela->r_offset + 4
12214 && ELF64_R_TYPE (irela[1].r_info) == R_PPC64_TOCSAVE)
12215 {
12216 if (!tocsave_find (htab, INSERT,
12217 &local_syms, irela + 1, input_bfd))
12218 goto error_ret_free_internal;
12219 }
12220 else if (stub_type == ppc_stub_plt_call)
12221 stub_type = ppc_stub_plt_call_r2save;
12222
12223 /* Support for grouping stub sections. */
12224 id_sec = htab->stub_group[section->id].link_sec;
12225
12226 /* Get the name of this stub. */
12227 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
12228 if (!stub_name)
12229 goto error_ret_free_internal;
12230
12231 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
12232 stub_name, FALSE, FALSE);
12233 if (stub_entry != NULL)
12234 {
12235 /* The proper stub has already been created. */
12236 free (stub_name);
12237 if (stub_type == ppc_stub_plt_call_r2save)
12238 stub_entry->stub_type = stub_type;
12239 continue;
12240 }
12241
12242 stub_entry = ppc_add_stub (stub_name, section, info);
12243 if (stub_entry == NULL)
12244 {
12245 free (stub_name);
12246 error_ret_free_internal:
12247 if (elf_section_data (section)->relocs == NULL)
12248 free (internal_relocs);
12249 error_ret_free_local:
12250 if (local_syms != NULL
12251 && (symtab_hdr->contents
12252 != (unsigned char *) local_syms))
12253 free (local_syms);
12254 return FALSE;
12255 }
12256
12257 stub_entry->stub_type = stub_type;
12258 if (stub_type != ppc_stub_plt_call
12259 && stub_type != ppc_stub_plt_call_r2save)
12260 {
12261 stub_entry->target_value = code_value;
12262 stub_entry->target_section = code_sec;
12263 }
12264 else
12265 {
12266 stub_entry->target_value = sym_value;
12267 stub_entry->target_section = sym_sec;
12268 }
12269 stub_entry->h = hash;
12270 stub_entry->plt_ent = plt_ent;
12271 stub_entry->other = hash ? hash->elf.other : sym->st_other;
12272
12273 if (stub_entry->h != NULL)
12274 htab->stub_globals += 1;
12275 }
12276
12277 /* We're done with the internal relocs, free them. */
12278 if (elf_section_data (section)->relocs != internal_relocs)
12279 free (internal_relocs);
12280 }
12281
12282 if (local_syms != NULL
12283 && symtab_hdr->contents != (unsigned char *) local_syms)
12284 {
12285 if (!info->keep_memory)
12286 free (local_syms);
12287 else
12288 symtab_hdr->contents = (unsigned char *) local_syms;
12289 }
12290 }
12291
12292 /* We may have added some stubs. Find out the new size of the
12293 stub sections. */
12294 for (stub_sec = htab->params->stub_bfd->sections;
12295 stub_sec != NULL;
12296 stub_sec = stub_sec->next)
12297 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12298 {
12299 stub_sec->rawsize = stub_sec->size;
12300 stub_sec->size = 0;
12301 stub_sec->reloc_count = 0;
12302 stub_sec->flags &= ~SEC_RELOC;
12303 }
12304
12305 htab->brlt->size = 0;
12306 htab->brlt->reloc_count = 0;
12307 htab->brlt->flags &= ~SEC_RELOC;
12308 if (htab->relbrlt != NULL)
12309 htab->relbrlt->size = 0;
12310
12311 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
12312
12313 if (info->emitrelocations
12314 && htab->glink != NULL && htab->glink->size != 0)
12315 {
12316 htab->glink->reloc_count = 1;
12317 htab->glink->flags |= SEC_RELOC;
12318 }
12319
12320 if (htab->glink_eh_frame != NULL
12321 && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
12322 && htab->glink_eh_frame->output_section->size != 0)
12323 {
12324 size_t size = 0, align;
12325
12326 for (stub_sec = htab->params->stub_bfd->sections;
12327 stub_sec != NULL;
12328 stub_sec = stub_sec->next)
12329 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12330 size += 24;
12331 if (htab->glink != NULL && htab->glink->size != 0)
12332 size += 24;
12333 if (size != 0)
12334 size += sizeof (glink_eh_frame_cie);
12335 align = 1;
12336 align <<= htab->glink_eh_frame->output_section->alignment_power;
12337 align -= 1;
12338 size = (size + align) & ~align;
12339 htab->glink_eh_frame->rawsize = htab->glink_eh_frame->size;
12340 htab->glink_eh_frame->size = size;
12341 }
12342
12343 if (htab->params->plt_stub_align != 0)
12344 for (stub_sec = htab->params->stub_bfd->sections;
12345 stub_sec != NULL;
12346 stub_sec = stub_sec->next)
12347 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12348 stub_sec->size = ((stub_sec->size
12349 + (1 << htab->params->plt_stub_align) - 1)
12350 & (-1 << htab->params->plt_stub_align));
12351
12352 for (stub_sec = htab->params->stub_bfd->sections;
12353 stub_sec != NULL;
12354 stub_sec = stub_sec->next)
12355 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
12356 && stub_sec->rawsize != stub_sec->size)
12357 break;
12358
12359 /* Exit from this loop when no stubs have been added, and no stubs
12360 have changed size. */
12361 if (stub_sec == NULL
12362 && (htab->glink_eh_frame == NULL
12363 || htab->glink_eh_frame->rawsize == htab->glink_eh_frame->size))
12364 break;
12365
12366 /* Ask the linker to do its stuff. */
12367 (*htab->params->layout_sections_again) ();
12368 }
12369
12370 if (htab->glink_eh_frame != NULL
12371 && htab->glink_eh_frame->size != 0)
12372 {
12373 bfd_vma val;
12374 bfd_byte *p, *last_fde;
12375 size_t last_fde_len, size, align, pad;
12376 asection *stub_sec;
12377
12378 p = bfd_zalloc (htab->glink_eh_frame->owner, htab->glink_eh_frame->size);
12379 if (p == NULL)
12380 return FALSE;
12381 htab->glink_eh_frame->contents = p;
12382 last_fde = p;
12383
12384 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
12385 /* CIE length (rewrite in case little-endian). */
12386 last_fde_len = sizeof (glink_eh_frame_cie) - 4;
12387 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
12388 p += sizeof (glink_eh_frame_cie);
12389
12390 for (stub_sec = htab->params->stub_bfd->sections;
12391 stub_sec != NULL;
12392 stub_sec = stub_sec->next)
12393 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12394 {
12395 last_fde = p;
12396 last_fde_len = 20;
12397 /* FDE length. */
12398 bfd_put_32 (htab->elf.dynobj, 20, p);
12399 p += 4;
12400 /* CIE pointer. */
12401 val = p - htab->glink_eh_frame->contents;
12402 bfd_put_32 (htab->elf.dynobj, val, p);
12403 p += 4;
12404 /* Offset to stub section, written later. */
12405 p += 4;
12406 /* stub section size. */
12407 bfd_put_32 (htab->elf.dynobj, stub_sec->size, p);
12408 p += 4;
12409 /* Augmentation. */
12410 p += 1;
12411 /* Pad. */
12412 p += 7;
12413 }
12414 if (htab->glink != NULL && htab->glink->size != 0)
12415 {
12416 last_fde = p;
12417 last_fde_len = 20;
12418 /* FDE length. */
12419 bfd_put_32 (htab->elf.dynobj, 20, p);
12420 p += 4;
12421 /* CIE pointer. */
12422 val = p - htab->glink_eh_frame->contents;
12423 bfd_put_32 (htab->elf.dynobj, val, p);
12424 p += 4;
12425 /* Offset to .glink, written later. */
12426 p += 4;
12427 /* .glink size. */
12428 bfd_put_32 (htab->elf.dynobj, htab->glink->size - 8, p);
12429 p += 4;
12430 /* Augmentation. */
12431 p += 1;
12432
12433 *p++ = DW_CFA_advance_loc + 1;
12434 *p++ = DW_CFA_register;
12435 *p++ = 65;
12436 *p++ = 12;
12437 *p++ = DW_CFA_advance_loc + 4;
12438 *p++ = DW_CFA_restore_extended;
12439 *p++ = 65;
12440 }
12441 /* Subsume any padding into the last FDE if user .eh_frame
12442 sections are aligned more than glink_eh_frame. Otherwise any
12443 zero padding will be seen as a terminator. */
12444 size = p - htab->glink_eh_frame->contents;
12445 align = 1;
12446 align <<= htab->glink_eh_frame->output_section->alignment_power;
12447 align -= 1;
12448 pad = ((size + align) & ~align) - size;
12449 htab->glink_eh_frame->size = size + pad;
12450 bfd_put_32 (htab->elf.dynobj, last_fde_len + pad, last_fde);
12451 }
12452
12453 maybe_strip_output (info, htab->brlt);
12454 if (htab->glink_eh_frame != NULL)
12455 maybe_strip_output (info, htab->glink_eh_frame);
12456
12457 return TRUE;
12458 }
12459
12460 /* Called after we have determined section placement. If sections
12461 move, we'll be called again. Provide a value for TOCstart. */
12462
12463 bfd_vma
12464 ppc64_elf_set_toc (struct bfd_link_info *info, bfd *obfd)
12465 {
12466 asection *s;
12467 bfd_vma TOCstart;
12468
12469 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
12470 order. The TOC starts where the first of these sections starts. */
12471 s = bfd_get_section_by_name (obfd, ".got");
12472 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12473 s = bfd_get_section_by_name (obfd, ".toc");
12474 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12475 s = bfd_get_section_by_name (obfd, ".tocbss");
12476 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12477 s = bfd_get_section_by_name (obfd, ".plt");
12478 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12479 {
12480 /* This may happen for
12481 o references to TOC base (SYM@toc / TOC[tc0]) without a
12482 .toc directive
12483 o bad linker script
12484 o --gc-sections and empty TOC sections
12485
12486 FIXME: Warn user? */
12487
12488 /* Look for a likely section. We probably won't even be
12489 using TOCstart. */
12490 for (s = obfd->sections; s != NULL; s = s->next)
12491 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY
12492 | SEC_EXCLUDE))
12493 == (SEC_ALLOC | SEC_SMALL_DATA))
12494 break;
12495 if (s == NULL)
12496 for (s = obfd->sections; s != NULL; s = s->next)
12497 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_EXCLUDE))
12498 == (SEC_ALLOC | SEC_SMALL_DATA))
12499 break;
12500 if (s == NULL)
12501 for (s = obfd->sections; s != NULL; s = s->next)
12502 if ((s->flags & (SEC_ALLOC | SEC_READONLY | SEC_EXCLUDE))
12503 == SEC_ALLOC)
12504 break;
12505 if (s == NULL)
12506 for (s = obfd->sections; s != NULL; s = s->next)
12507 if ((s->flags & (SEC_ALLOC | SEC_EXCLUDE)) == SEC_ALLOC)
12508 break;
12509 }
12510
12511 TOCstart = 0;
12512 if (s != NULL)
12513 TOCstart = s->output_section->vma + s->output_offset;
12514
12515 _bfd_set_gp_value (obfd, TOCstart);
12516
12517 if (info != NULL && s != NULL)
12518 {
12519 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12520
12521 if (htab != NULL)
12522 {
12523 if (htab->elf.hgot != NULL)
12524 {
12525 htab->elf.hgot->root.u.def.value = TOC_BASE_OFF;
12526 htab->elf.hgot->root.u.def.section = s;
12527 }
12528 }
12529 else
12530 {
12531 struct bfd_link_hash_entry *bh = NULL;
12532 _bfd_generic_link_add_one_symbol (info, obfd, ".TOC.", BSF_GLOBAL,
12533 s, TOC_BASE_OFF, NULL, FALSE,
12534 FALSE, &bh);
12535 }
12536 }
12537 return TOCstart;
12538 }
12539
12540 /* Called via elf_link_hash_traverse from ppc64_elf_build_stubs to
12541 write out any global entry stubs. */
12542
12543 static bfd_boolean
12544 build_global_entry_stubs (struct elf_link_hash_entry *h, void *inf)
12545 {
12546 struct bfd_link_info *info;
12547 struct ppc_link_hash_table *htab;
12548 struct plt_entry *pent;
12549 asection *s;
12550
12551 if (h->root.type == bfd_link_hash_indirect)
12552 return TRUE;
12553
12554 if (!h->pointer_equality_needed)
12555 return TRUE;
12556
12557 if (h->def_regular)
12558 return TRUE;
12559
12560 info = inf;
12561 htab = ppc_hash_table (info);
12562 if (htab == NULL)
12563 return FALSE;
12564
12565 s = htab->glink;
12566 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
12567 if (pent->plt.offset != (bfd_vma) -1
12568 && pent->addend == 0)
12569 {
12570 bfd_byte *p;
12571 asection *plt;
12572 bfd_vma off;
12573
12574 p = s->contents + h->root.u.def.value;
12575 plt = htab->elf.splt;
12576 if (!htab->elf.dynamic_sections_created
12577 || h->dynindx == -1)
12578 plt = htab->elf.iplt;
12579 off = pent->plt.offset + plt->output_offset + plt->output_section->vma;
12580 off -= h->root.u.def.value + s->output_offset + s->output_section->vma;
12581
12582 if (off + 0x80008000 > 0xffffffff || (off & 3) != 0)
12583 {
12584 info->callbacks->einfo
12585 (_("%P: linkage table error against `%T'\n"),
12586 h->root.root.string);
12587 bfd_set_error (bfd_error_bad_value);
12588 htab->stub_error = TRUE;
12589 }
12590
12591 htab->stub_count[ppc_stub_global_entry - 1] += 1;
12592 if (htab->params->emit_stub_syms)
12593 {
12594 size_t len = strlen (h->root.root.string);
12595 char *name = bfd_malloc (sizeof "12345678.global_entry." + len);
12596
12597 if (name == NULL)
12598 return FALSE;
12599
12600 sprintf (name, "%08x.global_entry.%s", s->id, h->root.root.string);
12601 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
12602 if (h == NULL)
12603 return FALSE;
12604 if (h->root.type == bfd_link_hash_new)
12605 {
12606 h->root.type = bfd_link_hash_defined;
12607 h->root.u.def.section = s;
12608 h->root.u.def.value = p - s->contents;
12609 h->ref_regular = 1;
12610 h->def_regular = 1;
12611 h->ref_regular_nonweak = 1;
12612 h->forced_local = 1;
12613 h->non_elf = 0;
12614 }
12615 }
12616
12617 if (PPC_HA (off) != 0)
12618 {
12619 bfd_put_32 (s->owner, ADDIS_R12_R12 | PPC_HA (off), p);
12620 p += 4;
12621 }
12622 bfd_put_32 (s->owner, LD_R12_0R12 | PPC_LO (off), p);
12623 p += 4;
12624 bfd_put_32 (s->owner, MTCTR_R12, p);
12625 p += 4;
12626 bfd_put_32 (s->owner, BCTR, p);
12627 break;
12628 }
12629 return TRUE;
12630 }
12631
12632 /* Build all the stubs associated with the current output file.
12633 The stubs are kept in a hash table attached to the main linker
12634 hash table. This function is called via gldelf64ppc_finish. */
12635
12636 bfd_boolean
12637 ppc64_elf_build_stubs (struct bfd_link_info *info,
12638 char **stats)
12639 {
12640 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12641 asection *stub_sec;
12642 bfd_byte *p;
12643 int stub_sec_count = 0;
12644
12645 if (htab == NULL)
12646 return FALSE;
12647
12648 /* Allocate memory to hold the linker stubs. */
12649 for (stub_sec = htab->params->stub_bfd->sections;
12650 stub_sec != NULL;
12651 stub_sec = stub_sec->next)
12652 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
12653 && stub_sec->size != 0)
12654 {
12655 stub_sec->contents = bfd_zalloc (htab->params->stub_bfd, stub_sec->size);
12656 if (stub_sec->contents == NULL)
12657 return FALSE;
12658 /* We want to check that built size is the same as calculated
12659 size. rawsize is a convenient location to use. */
12660 stub_sec->rawsize = stub_sec->size;
12661 stub_sec->size = 0;
12662 }
12663
12664 if (htab->glink != NULL && htab->glink->size != 0)
12665 {
12666 unsigned int indx;
12667 bfd_vma plt0;
12668
12669 /* Build the .glink plt call stub. */
12670 if (htab->params->emit_stub_syms)
12671 {
12672 struct elf_link_hash_entry *h;
12673 h = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
12674 TRUE, FALSE, FALSE);
12675 if (h == NULL)
12676 return FALSE;
12677 if (h->root.type == bfd_link_hash_new)
12678 {
12679 h->root.type = bfd_link_hash_defined;
12680 h->root.u.def.section = htab->glink;
12681 h->root.u.def.value = 8;
12682 h->ref_regular = 1;
12683 h->def_regular = 1;
12684 h->ref_regular_nonweak = 1;
12685 h->forced_local = 1;
12686 h->non_elf = 0;
12687 }
12688 }
12689 plt0 = (htab->elf.splt->output_section->vma
12690 + htab->elf.splt->output_offset
12691 - 16);
12692 if (info->emitrelocations)
12693 {
12694 Elf_Internal_Rela *r = get_relocs (htab->glink, 1);
12695 if (r == NULL)
12696 return FALSE;
12697 r->r_offset = (htab->glink->output_offset
12698 + htab->glink->output_section->vma);
12699 r->r_info = ELF64_R_INFO (0, R_PPC64_REL64);
12700 r->r_addend = plt0;
12701 }
12702 p = htab->glink->contents;
12703 plt0 -= htab->glink->output_section->vma + htab->glink->output_offset;
12704 bfd_put_64 (htab->glink->owner, plt0, p);
12705 p += 8;
12706 if (htab->opd_abi)
12707 {
12708 bfd_put_32 (htab->glink->owner, MFLR_R12, p);
12709 p += 4;
12710 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
12711 p += 4;
12712 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
12713 p += 4;
12714 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | (-16 & 0xfffc), p);
12715 p += 4;
12716 bfd_put_32 (htab->glink->owner, MTLR_R12, p);
12717 p += 4;
12718 bfd_put_32 (htab->glink->owner, ADD_R11_R2_R11, p);
12719 p += 4;
12720 bfd_put_32 (htab->glink->owner, LD_R12_0R11, p);
12721 p += 4;
12722 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | 8, p);
12723 p += 4;
12724 bfd_put_32 (htab->glink->owner, MTCTR_R12, p);
12725 p += 4;
12726 bfd_put_32 (htab->glink->owner, LD_R11_0R11 | 16, p);
12727 p += 4;
12728 }
12729 else
12730 {
12731 bfd_put_32 (htab->glink->owner, MFLR_R0, p);
12732 p += 4;
12733 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
12734 p += 4;
12735 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
12736 p += 4;
12737 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | (-16 & 0xfffc), p);
12738 p += 4;
12739 bfd_put_32 (htab->glink->owner, MTLR_R0, p);
12740 p += 4;
12741 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
12742 p += 4;
12743 bfd_put_32 (htab->glink->owner, ADD_R11_R2_R11, p);
12744 p += 4;
12745 bfd_put_32 (htab->glink->owner, ADDI_R0_R12 | (-48 & 0xffff), p);
12746 p += 4;
12747 bfd_put_32 (htab->glink->owner, LD_R12_0R11, p);
12748 p += 4;
12749 bfd_put_32 (htab->glink->owner, SRDI_R0_R0_2, p);
12750 p += 4;
12751 bfd_put_32 (htab->glink->owner, MTCTR_R12, p);
12752 p += 4;
12753 bfd_put_32 (htab->glink->owner, LD_R11_0R11 | 8, p);
12754 p += 4;
12755 }
12756 bfd_put_32 (htab->glink->owner, BCTR, p);
12757 p += 4;
12758 while (p - htab->glink->contents < GLINK_CALL_STUB_SIZE)
12759 {
12760 bfd_put_32 (htab->glink->owner, NOP, p);
12761 p += 4;
12762 }
12763
12764 /* Build the .glink lazy link call stubs. */
12765 indx = 0;
12766 while (p < htab->glink->contents + htab->glink->rawsize)
12767 {
12768 if (htab->opd_abi)
12769 {
12770 if (indx < 0x8000)
12771 {
12772 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
12773 p += 4;
12774 }
12775 else
12776 {
12777 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
12778 p += 4;
12779 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx),
12780 p);
12781 p += 4;
12782 }
12783 }
12784 bfd_put_32 (htab->glink->owner,
12785 B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p);
12786 indx++;
12787 p += 4;
12788 }
12789
12790 /* Build .glink global entry stubs. */
12791 if (htab->glink->size > htab->glink->rawsize)
12792 elf_link_hash_traverse (&htab->elf, build_global_entry_stubs, info);
12793 }
12794
12795 if (htab->brlt != NULL && htab->brlt->size != 0)
12796 {
12797 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
12798 htab->brlt->size);
12799 if (htab->brlt->contents == NULL)
12800 return FALSE;
12801 }
12802 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
12803 {
12804 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
12805 htab->relbrlt->size);
12806 if (htab->relbrlt->contents == NULL)
12807 return FALSE;
12808 }
12809
12810 /* Build the stubs as directed by the stub hash table. */
12811 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
12812
12813 if (htab->relbrlt != NULL)
12814 htab->relbrlt->reloc_count = 0;
12815
12816 if (htab->params->plt_stub_align != 0)
12817 for (stub_sec = htab->params->stub_bfd->sections;
12818 stub_sec != NULL;
12819 stub_sec = stub_sec->next)
12820 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12821 stub_sec->size = ((stub_sec->size
12822 + (1 << htab->params->plt_stub_align) - 1)
12823 & (-1 << htab->params->plt_stub_align));
12824
12825 for (stub_sec = htab->params->stub_bfd->sections;
12826 stub_sec != NULL;
12827 stub_sec = stub_sec->next)
12828 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12829 {
12830 stub_sec_count += 1;
12831 if (stub_sec->rawsize != stub_sec->size)
12832 break;
12833 }
12834
12835 /* Note that the glink_eh_frame check here is not only testing that
12836 the generated size matched the calculated size but also that
12837 bfd_elf_discard_info didn't make any changes to the section. */
12838 if (stub_sec != NULL
12839 || (htab->glink_eh_frame != NULL
12840 && htab->glink_eh_frame->rawsize != htab->glink_eh_frame->size))
12841 {
12842 htab->stub_error = TRUE;
12843 info->callbacks->einfo (_("%P: stubs don't match calculated size\n"));
12844 }
12845
12846 if (htab->stub_error)
12847 return FALSE;
12848
12849 if (stats != NULL)
12850 {
12851 *stats = bfd_malloc (500);
12852 if (*stats == NULL)
12853 return FALSE;
12854
12855 sprintf (*stats, _("linker stubs in %u group%s\n"
12856 " branch %lu\n"
12857 " toc adjust %lu\n"
12858 " long branch %lu\n"
12859 " long toc adj %lu\n"
12860 " plt call %lu\n"
12861 " plt call toc %lu\n"
12862 " global entry %lu"),
12863 stub_sec_count,
12864 stub_sec_count == 1 ? "" : "s",
12865 htab->stub_count[ppc_stub_long_branch - 1],
12866 htab->stub_count[ppc_stub_long_branch_r2off - 1],
12867 htab->stub_count[ppc_stub_plt_branch - 1],
12868 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
12869 htab->stub_count[ppc_stub_plt_call - 1],
12870 htab->stub_count[ppc_stub_plt_call_r2save - 1],
12871 htab->stub_count[ppc_stub_global_entry - 1]);
12872 }
12873 return TRUE;
12874 }
12875
12876 /* This function undoes the changes made by add_symbol_adjust. */
12877
12878 static bfd_boolean
12879 undo_symbol_twiddle (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
12880 {
12881 struct ppc_link_hash_entry *eh;
12882
12883 if (h->root.type == bfd_link_hash_indirect)
12884 return TRUE;
12885
12886 eh = (struct ppc_link_hash_entry *) h;
12887 if (eh->elf.root.type != bfd_link_hash_undefweak || !eh->was_undefined)
12888 return TRUE;
12889
12890 eh->elf.root.type = bfd_link_hash_undefined;
12891 return TRUE;
12892 }
12893
12894 void
12895 ppc64_elf_restore_symbols (struct bfd_link_info *info)
12896 {
12897 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12898
12899 if (htab != NULL)
12900 elf_link_hash_traverse (&htab->elf, undo_symbol_twiddle, info);
12901 }
12902
12903 /* What to do when ld finds relocations against symbols defined in
12904 discarded sections. */
12905
12906 static unsigned int
12907 ppc64_elf_action_discarded (asection *sec)
12908 {
12909 if (strcmp (".opd", sec->name) == 0)
12910 return 0;
12911
12912 if (strcmp (".toc", sec->name) == 0)
12913 return 0;
12914
12915 if (strcmp (".toc1", sec->name) == 0)
12916 return 0;
12917
12918 return _bfd_elf_default_action_discarded (sec);
12919 }
12920
12921 /* The RELOCATE_SECTION function is called by the ELF backend linker
12922 to handle the relocations for a section.
12923
12924 The relocs are always passed as Rela structures; if the section
12925 actually uses Rel structures, the r_addend field will always be
12926 zero.
12927
12928 This function is responsible for adjust the section contents as
12929 necessary, and (if using Rela relocs and generating a
12930 relocatable output file) adjusting the reloc addend as
12931 necessary.
12932
12933 This function does not have to worry about setting the reloc
12934 address or the reloc symbol index.
12935
12936 LOCAL_SYMS is a pointer to the swapped in local symbols.
12937
12938 LOCAL_SECTIONS is an array giving the section in the input file
12939 corresponding to the st_shndx field of each local symbol.
12940
12941 The global hash table entry for the global symbols can be found
12942 via elf_sym_hashes (input_bfd).
12943
12944 When generating relocatable output, this function must handle
12945 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
12946 going to be the section symbol corresponding to the output
12947 section, which means that the addend must be adjusted
12948 accordingly. */
12949
12950 static bfd_boolean
12951 ppc64_elf_relocate_section (bfd *output_bfd,
12952 struct bfd_link_info *info,
12953 bfd *input_bfd,
12954 asection *input_section,
12955 bfd_byte *contents,
12956 Elf_Internal_Rela *relocs,
12957 Elf_Internal_Sym *local_syms,
12958 asection **local_sections)
12959 {
12960 struct ppc_link_hash_table *htab;
12961 Elf_Internal_Shdr *symtab_hdr;
12962 struct elf_link_hash_entry **sym_hashes;
12963 Elf_Internal_Rela *rel;
12964 Elf_Internal_Rela *relend;
12965 Elf_Internal_Rela outrel;
12966 bfd_byte *loc;
12967 struct got_entry **local_got_ents;
12968 bfd_vma TOCstart;
12969 bfd_boolean ret = TRUE;
12970 bfd_boolean is_opd;
12971 /* Assume 'at' branch hints. */
12972 bfd_boolean is_isa_v2 = TRUE;
12973 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
12974
12975 /* Initialize howto table if needed. */
12976 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
12977 ppc_howto_init ();
12978
12979 htab = ppc_hash_table (info);
12980 if (htab == NULL)
12981 return FALSE;
12982
12983 /* Don't relocate stub sections. */
12984 if (input_section->owner == htab->params->stub_bfd)
12985 return TRUE;
12986
12987 BFD_ASSERT (is_ppc64_elf (input_bfd));
12988
12989 local_got_ents = elf_local_got_ents (input_bfd);
12990 TOCstart = elf_gp (output_bfd);
12991 symtab_hdr = &elf_symtab_hdr (input_bfd);
12992 sym_hashes = elf_sym_hashes (input_bfd);
12993 is_opd = ppc64_elf_section_data (input_section)->sec_type == sec_opd;
12994
12995 rel = relocs;
12996 relend = relocs + input_section->reloc_count;
12997 for (; rel < relend; rel++)
12998 {
12999 enum elf_ppc64_reloc_type r_type;
13000 bfd_vma addend;
13001 bfd_reloc_status_type r;
13002 Elf_Internal_Sym *sym;
13003 asection *sec;
13004 struct elf_link_hash_entry *h_elf;
13005 struct ppc_link_hash_entry *h;
13006 struct ppc_link_hash_entry *fdh;
13007 const char *sym_name;
13008 unsigned long r_symndx, toc_symndx;
13009 bfd_vma toc_addend;
13010 unsigned char tls_mask, tls_gd, tls_type;
13011 unsigned char sym_type;
13012 bfd_vma relocation;
13013 bfd_boolean unresolved_reloc;
13014 bfd_boolean warned;
13015 enum { DEST_NORMAL, DEST_OPD, DEST_STUB } reloc_dest;
13016 unsigned int insn;
13017 unsigned int mask;
13018 struct ppc_stub_hash_entry *stub_entry;
13019 bfd_vma max_br_offset;
13020 bfd_vma from;
13021 const Elf_Internal_Rela orig_rel = *rel;
13022 reloc_howto_type *howto;
13023 struct reloc_howto_struct alt_howto;
13024
13025 r_type = ELF64_R_TYPE (rel->r_info);
13026 r_symndx = ELF64_R_SYM (rel->r_info);
13027
13028 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
13029 symbol of the previous ADDR64 reloc. The symbol gives us the
13030 proper TOC base to use. */
13031 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
13032 && rel != relocs
13033 && ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_ADDR64
13034 && is_opd)
13035 r_symndx = ELF64_R_SYM (rel[-1].r_info);
13036
13037 sym = NULL;
13038 sec = NULL;
13039 h_elf = NULL;
13040 sym_name = NULL;
13041 unresolved_reloc = FALSE;
13042 warned = FALSE;
13043
13044 if (r_symndx < symtab_hdr->sh_info)
13045 {
13046 /* It's a local symbol. */
13047 struct _opd_sec_data *opd;
13048
13049 sym = local_syms + r_symndx;
13050 sec = local_sections[r_symndx];
13051 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
13052 sym_type = ELF64_ST_TYPE (sym->st_info);
13053 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
13054 opd = get_opd_info (sec);
13055 if (opd != NULL && opd->adjust != NULL)
13056 {
13057 long adjust = opd->adjust[(sym->st_value + rel->r_addend) / 8];
13058 if (adjust == -1)
13059 relocation = 0;
13060 else
13061 {
13062 /* If this is a relocation against the opd section sym
13063 and we have edited .opd, adjust the reloc addend so
13064 that ld -r and ld --emit-relocs output is correct.
13065 If it is a reloc against some other .opd symbol,
13066 then the symbol value will be adjusted later. */
13067 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
13068 rel->r_addend += adjust;
13069 else
13070 relocation += adjust;
13071 }
13072 }
13073 }
13074 else
13075 {
13076 bfd_boolean ignored;
13077
13078 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
13079 r_symndx, symtab_hdr, sym_hashes,
13080 h_elf, sec, relocation,
13081 unresolved_reloc, warned, ignored);
13082 sym_name = h_elf->root.root.string;
13083 sym_type = h_elf->type;
13084 if (sec != NULL
13085 && sec->owner == output_bfd
13086 && strcmp (sec->name, ".opd") == 0)
13087 {
13088 /* This is a symbol defined in a linker script. All
13089 such are defined in output sections, even those
13090 defined by simple assignment from a symbol defined in
13091 an input section. Transfer the symbol to an
13092 appropriate input .opd section, so that a branch to
13093 this symbol will be mapped to the location specified
13094 by the opd entry. */
13095 struct bfd_link_order *lo;
13096 for (lo = sec->map_head.link_order; lo != NULL; lo = lo->next)
13097 if (lo->type == bfd_indirect_link_order)
13098 {
13099 asection *isec = lo->u.indirect.section;
13100 if (h_elf->root.u.def.value >= isec->output_offset
13101 && h_elf->root.u.def.value < (isec->output_offset
13102 + isec->size))
13103 {
13104 h_elf->root.u.def.value -= isec->output_offset;
13105 h_elf->root.u.def.section = isec;
13106 sec = isec;
13107 break;
13108 }
13109 }
13110 }
13111 }
13112 h = (struct ppc_link_hash_entry *) h_elf;
13113
13114 if (sec != NULL && discarded_section (sec))
13115 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
13116 rel, 1, relend,
13117 ppc64_elf_howto_table[r_type], 0,
13118 contents);
13119
13120 if (info->relocatable)
13121 continue;
13122
13123 if (h != NULL && &h->elf == htab->elf.hgot)
13124 {
13125 relocation = (TOCstart
13126 + htab->stub_group[input_section->id].toc_off);
13127 sec = bfd_abs_section_ptr;
13128 unresolved_reloc = FALSE;
13129 }
13130
13131 /* TLS optimizations. Replace instruction sequences and relocs
13132 based on information we collected in tls_optimize. We edit
13133 RELOCS so that --emit-relocs will output something sensible
13134 for the final instruction stream. */
13135 tls_mask = 0;
13136 tls_gd = 0;
13137 toc_symndx = 0;
13138 if (h != NULL)
13139 tls_mask = h->tls_mask;
13140 else if (local_got_ents != NULL)
13141 {
13142 struct plt_entry **local_plt = (struct plt_entry **)
13143 (local_got_ents + symtab_hdr->sh_info);
13144 unsigned char *lgot_masks = (unsigned char *)
13145 (local_plt + symtab_hdr->sh_info);
13146 tls_mask = lgot_masks[r_symndx];
13147 }
13148 if (tls_mask == 0
13149 && (r_type == R_PPC64_TLS
13150 || r_type == R_PPC64_TLSGD
13151 || r_type == R_PPC64_TLSLD))
13152 {
13153 /* Check for toc tls entries. */
13154 unsigned char *toc_tls;
13155
13156 if (!get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
13157 &local_syms, rel, input_bfd))
13158 return FALSE;
13159
13160 if (toc_tls)
13161 tls_mask = *toc_tls;
13162 }
13163
13164 /* Check that tls relocs are used with tls syms, and non-tls
13165 relocs are used with non-tls syms. */
13166 if (r_symndx != STN_UNDEF
13167 && r_type != R_PPC64_NONE
13168 && (h == NULL
13169 || h->elf.root.type == bfd_link_hash_defined
13170 || h->elf.root.type == bfd_link_hash_defweak)
13171 && (IS_PPC64_TLS_RELOC (r_type)
13172 != (sym_type == STT_TLS
13173 || (sym_type == STT_SECTION
13174 && (sec->flags & SEC_THREAD_LOCAL) != 0))))
13175 {
13176 if (tls_mask != 0
13177 && (r_type == R_PPC64_TLS
13178 || r_type == R_PPC64_TLSGD
13179 || r_type == R_PPC64_TLSLD))
13180 /* R_PPC64_TLS is OK against a symbol in the TOC. */
13181 ;
13182 else
13183 info->callbacks->einfo
13184 (!IS_PPC64_TLS_RELOC (r_type)
13185 ? _("%P: %H: %s used with TLS symbol `%T'\n")
13186 : _("%P: %H: %s used with non-TLS symbol `%T'\n"),
13187 input_bfd, input_section, rel->r_offset,
13188 ppc64_elf_howto_table[r_type]->name,
13189 sym_name);
13190 }
13191
13192 /* Ensure reloc mapping code below stays sane. */
13193 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
13194 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
13195 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
13196 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
13197 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
13198 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
13199 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
13200 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
13201 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
13202 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
13203 abort ();
13204
13205 switch (r_type)
13206 {
13207 default:
13208 break;
13209
13210 case R_PPC64_LO_DS_OPT:
13211 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
13212 if ((insn & (0x3f << 26)) != 58u << 26)
13213 abort ();
13214 insn += (14u << 26) - (58u << 26);
13215 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
13216 r_type = R_PPC64_TOC16_LO;
13217 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13218 break;
13219
13220 case R_PPC64_TOC16:
13221 case R_PPC64_TOC16_LO:
13222 case R_PPC64_TOC16_DS:
13223 case R_PPC64_TOC16_LO_DS:
13224 {
13225 /* Check for toc tls entries. */
13226 unsigned char *toc_tls;
13227 int retval;
13228
13229 retval = get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
13230 &local_syms, rel, input_bfd);
13231 if (retval == 0)
13232 return FALSE;
13233
13234 if (toc_tls)
13235 {
13236 tls_mask = *toc_tls;
13237 if (r_type == R_PPC64_TOC16_DS
13238 || r_type == R_PPC64_TOC16_LO_DS)
13239 {
13240 if (tls_mask != 0
13241 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
13242 goto toctprel;
13243 }
13244 else
13245 {
13246 /* If we found a GD reloc pair, then we might be
13247 doing a GD->IE transition. */
13248 if (retval == 2)
13249 {
13250 tls_gd = TLS_TPRELGD;
13251 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13252 goto tls_ldgd_opt;
13253 }
13254 else if (retval == 3)
13255 {
13256 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13257 goto tls_ldgd_opt;
13258 }
13259 }
13260 }
13261 }
13262 break;
13263
13264 case R_PPC64_GOT_TPREL16_HI:
13265 case R_PPC64_GOT_TPREL16_HA:
13266 if (tls_mask != 0
13267 && (tls_mask & TLS_TPREL) == 0)
13268 {
13269 rel->r_offset -= d_offset;
13270 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
13271 r_type = R_PPC64_NONE;
13272 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13273 }
13274 break;
13275
13276 case R_PPC64_GOT_TPREL16_DS:
13277 case R_PPC64_GOT_TPREL16_LO_DS:
13278 if (tls_mask != 0
13279 && (tls_mask & TLS_TPREL) == 0)
13280 {
13281 toctprel:
13282 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
13283 insn &= 31 << 21;
13284 insn |= 0x3c0d0000; /* addis 0,13,0 */
13285 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
13286 r_type = R_PPC64_TPREL16_HA;
13287 if (toc_symndx != 0)
13288 {
13289 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
13290 rel->r_addend = toc_addend;
13291 /* We changed the symbol. Start over in order to
13292 get h, sym, sec etc. right. */
13293 rel--;
13294 continue;
13295 }
13296 else
13297 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13298 }
13299 break;
13300
13301 case R_PPC64_TLS:
13302 if (tls_mask != 0
13303 && (tls_mask & TLS_TPREL) == 0)
13304 {
13305 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
13306 insn = _bfd_elf_ppc_at_tls_transform (insn, 13);
13307 if (insn == 0)
13308 abort ();
13309 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
13310 /* Was PPC64_TLS which sits on insn boundary, now
13311 PPC64_TPREL16_LO which is at low-order half-word. */
13312 rel->r_offset += d_offset;
13313 r_type = R_PPC64_TPREL16_LO;
13314 if (toc_symndx != 0)
13315 {
13316 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
13317 rel->r_addend = toc_addend;
13318 /* We changed the symbol. Start over in order to
13319 get h, sym, sec etc. right. */
13320 rel--;
13321 continue;
13322 }
13323 else
13324 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13325 }
13326 break;
13327
13328 case R_PPC64_GOT_TLSGD16_HI:
13329 case R_PPC64_GOT_TLSGD16_HA:
13330 tls_gd = TLS_TPRELGD;
13331 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13332 goto tls_gdld_hi;
13333 break;
13334
13335 case R_PPC64_GOT_TLSLD16_HI:
13336 case R_PPC64_GOT_TLSLD16_HA:
13337 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13338 {
13339 tls_gdld_hi:
13340 if ((tls_mask & tls_gd) != 0)
13341 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
13342 + R_PPC64_GOT_TPREL16_DS);
13343 else
13344 {
13345 rel->r_offset -= d_offset;
13346 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
13347 r_type = R_PPC64_NONE;
13348 }
13349 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13350 }
13351 break;
13352
13353 case R_PPC64_GOT_TLSGD16:
13354 case R_PPC64_GOT_TLSGD16_LO:
13355 tls_gd = TLS_TPRELGD;
13356 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13357 goto tls_ldgd_opt;
13358 break;
13359
13360 case R_PPC64_GOT_TLSLD16:
13361 case R_PPC64_GOT_TLSLD16_LO:
13362 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13363 {
13364 unsigned int insn1, insn2, insn3;
13365 bfd_vma offset;
13366
13367 tls_ldgd_opt:
13368 offset = (bfd_vma) -1;
13369 /* If not using the newer R_PPC64_TLSGD/LD to mark
13370 __tls_get_addr calls, we must trust that the call
13371 stays with its arg setup insns, ie. that the next
13372 reloc is the __tls_get_addr call associated with
13373 the current reloc. Edit both insns. */
13374 if (input_section->has_tls_get_addr_call
13375 && rel + 1 < relend
13376 && branch_reloc_hash_match (input_bfd, rel + 1,
13377 htab->tls_get_addr,
13378 htab->tls_get_addr_fd))
13379 offset = rel[1].r_offset;
13380 if ((tls_mask & tls_gd) != 0)
13381 {
13382 /* IE */
13383 insn1 = bfd_get_32 (output_bfd,
13384 contents + rel->r_offset - d_offset);
13385 insn1 &= (1 << 26) - (1 << 2);
13386 insn1 |= 58 << 26; /* ld */
13387 insn2 = 0x7c636a14; /* add 3,3,13 */
13388 if (offset != (bfd_vma) -1)
13389 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13390 if ((tls_mask & TLS_EXPLICIT) == 0)
13391 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
13392 + R_PPC64_GOT_TPREL16_DS);
13393 else
13394 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
13395 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13396 }
13397 else
13398 {
13399 /* LE */
13400 insn1 = 0x3c6d0000; /* addis 3,13,0 */
13401 insn2 = 0x38630000; /* addi 3,3,0 */
13402 if (tls_gd == 0)
13403 {
13404 /* Was an LD reloc. */
13405 if (toc_symndx)
13406 sec = local_sections[toc_symndx];
13407 for (r_symndx = 0;
13408 r_symndx < symtab_hdr->sh_info;
13409 r_symndx++)
13410 if (local_sections[r_symndx] == sec)
13411 break;
13412 if (r_symndx >= symtab_hdr->sh_info)
13413 r_symndx = STN_UNDEF;
13414 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
13415 if (r_symndx != STN_UNDEF)
13416 rel->r_addend -= (local_syms[r_symndx].st_value
13417 + sec->output_offset
13418 + sec->output_section->vma);
13419 }
13420 else if (toc_symndx != 0)
13421 {
13422 r_symndx = toc_symndx;
13423 rel->r_addend = toc_addend;
13424 }
13425 r_type = R_PPC64_TPREL16_HA;
13426 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13427 if (offset != (bfd_vma) -1)
13428 {
13429 rel[1].r_info = ELF64_R_INFO (r_symndx,
13430 R_PPC64_TPREL16_LO);
13431 rel[1].r_offset = offset + d_offset;
13432 rel[1].r_addend = rel->r_addend;
13433 }
13434 }
13435 bfd_put_32 (output_bfd, insn1,
13436 contents + rel->r_offset - d_offset);
13437 if (offset != (bfd_vma) -1)
13438 {
13439 insn3 = bfd_get_32 (output_bfd,
13440 contents + offset + 4);
13441 if (insn3 == NOP
13442 || insn3 == CROR_151515 || insn3 == CROR_313131)
13443 {
13444 rel[1].r_offset += 4;
13445 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
13446 insn2 = NOP;
13447 }
13448 bfd_put_32 (output_bfd, insn2, contents + offset);
13449 }
13450 if ((tls_mask & tls_gd) == 0
13451 && (tls_gd == 0 || toc_symndx != 0))
13452 {
13453 /* We changed the symbol. Start over in order
13454 to get h, sym, sec etc. right. */
13455 rel--;
13456 continue;
13457 }
13458 }
13459 break;
13460
13461 case R_PPC64_TLSGD:
13462 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13463 {
13464 unsigned int insn2, insn3;
13465 bfd_vma offset = rel->r_offset;
13466
13467 if ((tls_mask & TLS_TPRELGD) != 0)
13468 {
13469 /* IE */
13470 r_type = R_PPC64_NONE;
13471 insn2 = 0x7c636a14; /* add 3,3,13 */
13472 }
13473 else
13474 {
13475 /* LE */
13476 if (toc_symndx != 0)
13477 {
13478 r_symndx = toc_symndx;
13479 rel->r_addend = toc_addend;
13480 }
13481 r_type = R_PPC64_TPREL16_LO;
13482 rel->r_offset = offset + d_offset;
13483 insn2 = 0x38630000; /* addi 3,3,0 */
13484 }
13485 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13486 /* Zap the reloc on the _tls_get_addr call too. */
13487 BFD_ASSERT (offset == rel[1].r_offset);
13488 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13489 insn3 = bfd_get_32 (output_bfd,
13490 contents + offset + 4);
13491 if (insn3 == NOP
13492 || insn3 == CROR_151515 || insn3 == CROR_313131)
13493 {
13494 rel->r_offset += 4;
13495 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
13496 insn2 = NOP;
13497 }
13498 bfd_put_32 (output_bfd, insn2, contents + offset);
13499 if ((tls_mask & TLS_TPRELGD) == 0 && toc_symndx != 0)
13500 {
13501 rel--;
13502 continue;
13503 }
13504 }
13505 break;
13506
13507 case R_PPC64_TLSLD:
13508 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13509 {
13510 unsigned int insn2, insn3;
13511 bfd_vma offset = rel->r_offset;
13512
13513 if (toc_symndx)
13514 sec = local_sections[toc_symndx];
13515 for (r_symndx = 0;
13516 r_symndx < symtab_hdr->sh_info;
13517 r_symndx++)
13518 if (local_sections[r_symndx] == sec)
13519 break;
13520 if (r_symndx >= symtab_hdr->sh_info)
13521 r_symndx = STN_UNDEF;
13522 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
13523 if (r_symndx != STN_UNDEF)
13524 rel->r_addend -= (local_syms[r_symndx].st_value
13525 + sec->output_offset
13526 + sec->output_section->vma);
13527
13528 r_type = R_PPC64_TPREL16_LO;
13529 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13530 rel->r_offset = offset + d_offset;
13531 /* Zap the reloc on the _tls_get_addr call too. */
13532 BFD_ASSERT (offset == rel[1].r_offset);
13533 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13534 insn2 = 0x38630000; /* addi 3,3,0 */
13535 insn3 = bfd_get_32 (output_bfd,
13536 contents + offset + 4);
13537 if (insn3 == NOP
13538 || insn3 == CROR_151515 || insn3 == CROR_313131)
13539 {
13540 rel->r_offset += 4;
13541 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
13542 insn2 = NOP;
13543 }
13544 bfd_put_32 (output_bfd, insn2, contents + offset);
13545 rel--;
13546 continue;
13547 }
13548 break;
13549
13550 case R_PPC64_DTPMOD64:
13551 if (rel + 1 < relend
13552 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
13553 && rel[1].r_offset == rel->r_offset + 8)
13554 {
13555 if ((tls_mask & TLS_GD) == 0)
13556 {
13557 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
13558 if ((tls_mask & TLS_TPRELGD) != 0)
13559 r_type = R_PPC64_TPREL64;
13560 else
13561 {
13562 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
13563 r_type = R_PPC64_NONE;
13564 }
13565 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13566 }
13567 }
13568 else
13569 {
13570 if ((tls_mask & TLS_LD) == 0)
13571 {
13572 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
13573 r_type = R_PPC64_NONE;
13574 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13575 }
13576 }
13577 break;
13578
13579 case R_PPC64_TPREL64:
13580 if ((tls_mask & TLS_TPREL) == 0)
13581 {
13582 r_type = R_PPC64_NONE;
13583 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13584 }
13585 break;
13586
13587 case R_PPC64_REL16_HA:
13588 /* If we are generating a non-PIC executable, edit
13589 . 0: addis 2,12,.TOC.-0b@ha
13590 . addi 2,2,.TOC.-0b@l
13591 used by ELFv2 global entry points to set up r2, to
13592 . lis 2,.TOC.@ha
13593 . addi 2,2,.TOC.@l
13594 if .TOC. is in range. */
13595 if (!info->shared
13596 && !info->traditional_format
13597 && h != NULL && &h->elf == htab->elf.hgot
13598 && rel + 1 < relend
13599 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_REL16_LO)
13600 && rel[1].r_offset == rel->r_offset + 4
13601 && rel[1].r_addend == rel->r_addend + 4
13602 && relocation + 0x80008000 <= 0xffffffff)
13603 {
13604 unsigned int insn1, insn2;
13605 bfd_vma offset = rel->r_offset - d_offset;
13606 insn1 = bfd_get_32 (output_bfd, contents + offset);
13607 insn2 = bfd_get_32 (output_bfd, contents + offset + 4);
13608 if ((insn1 & 0xffff0000) == 0x3c4c0000 /* addis 2,12 */
13609 && (insn2 & 0xffff0000) == 0x38420000 /* addi 2,2 */)
13610 {
13611 r_type = R_PPC64_ADDR16_HA;
13612 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13613 rel->r_addend -= d_offset;
13614 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_ADDR16_LO);
13615 rel[1].r_addend -= d_offset + 4;
13616 bfd_put_32 (output_bfd, 0x3c400000, contents + offset);
13617 }
13618 }
13619 break;
13620 }
13621
13622 /* Handle other relocations that tweak non-addend part of insn. */
13623 insn = 0;
13624 max_br_offset = 1 << 25;
13625 addend = rel->r_addend;
13626 reloc_dest = DEST_NORMAL;
13627 switch (r_type)
13628 {
13629 default:
13630 break;
13631
13632 case R_PPC64_TOCSAVE:
13633 if (relocation + addend == (rel->r_offset
13634 + input_section->output_offset
13635 + input_section->output_section->vma)
13636 && tocsave_find (htab, NO_INSERT,
13637 &local_syms, rel, input_bfd))
13638 {
13639 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
13640 if (insn == NOP
13641 || insn == CROR_151515 || insn == CROR_313131)
13642 bfd_put_32 (input_bfd,
13643 STD_R2_0R1 + STK_TOC (htab),
13644 contents + rel->r_offset);
13645 }
13646 break;
13647
13648 /* Branch taken prediction relocations. */
13649 case R_PPC64_ADDR14_BRTAKEN:
13650 case R_PPC64_REL14_BRTAKEN:
13651 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
13652 /* Fall thru. */
13653
13654 /* Branch not taken prediction relocations. */
13655 case R_PPC64_ADDR14_BRNTAKEN:
13656 case R_PPC64_REL14_BRNTAKEN:
13657 insn |= bfd_get_32 (output_bfd,
13658 contents + rel->r_offset) & ~(0x01 << 21);
13659 /* Fall thru. */
13660
13661 case R_PPC64_REL14:
13662 max_br_offset = 1 << 15;
13663 /* Fall thru. */
13664
13665 case R_PPC64_REL24:
13666 /* Calls to functions with a different TOC, such as calls to
13667 shared objects, need to alter the TOC pointer. This is
13668 done using a linkage stub. A REL24 branching to these
13669 linkage stubs needs to be followed by a nop, as the nop
13670 will be replaced with an instruction to restore the TOC
13671 base pointer. */
13672 fdh = h;
13673 if (h != NULL
13674 && h->oh != NULL
13675 && h->oh->is_func_descriptor)
13676 fdh = ppc_follow_link (h->oh);
13677 stub_entry = ppc_get_stub_entry (input_section, sec, fdh, &orig_rel,
13678 htab);
13679 if (stub_entry != NULL
13680 && (stub_entry->stub_type == ppc_stub_plt_call
13681 || stub_entry->stub_type == ppc_stub_plt_call_r2save
13682 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
13683 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
13684 {
13685 bfd_boolean can_plt_call = FALSE;
13686
13687 /* All of these stubs will modify r2, so there must be a
13688 branch and link followed by a nop. The nop is
13689 replaced by an insn to restore r2. */
13690 if (rel->r_offset + 8 <= input_section->size)
13691 {
13692 unsigned long br;
13693
13694 br = bfd_get_32 (input_bfd,
13695 contents + rel->r_offset);
13696 if ((br & 1) != 0)
13697 {
13698 unsigned long nop;
13699
13700 nop = bfd_get_32 (input_bfd,
13701 contents + rel->r_offset + 4);
13702 if (nop == NOP
13703 || nop == CROR_151515 || nop == CROR_313131)
13704 {
13705 if (h != NULL
13706 && (h == htab->tls_get_addr_fd
13707 || h == htab->tls_get_addr)
13708 && !htab->params->no_tls_get_addr_opt)
13709 {
13710 /* Special stub used, leave nop alone. */
13711 }
13712 else
13713 bfd_put_32 (input_bfd,
13714 LD_R2_0R1 + STK_TOC (htab),
13715 contents + rel->r_offset + 4);
13716 can_plt_call = TRUE;
13717 }
13718 }
13719 }
13720
13721 if (!can_plt_call && h != NULL)
13722 {
13723 const char *name = h->elf.root.root.string;
13724
13725 if (*name == '.')
13726 ++name;
13727
13728 if (strncmp (name, "__libc_start_main", 17) == 0
13729 && (name[17] == 0 || name[17] == '@'))
13730 {
13731 /* Allow crt1 branch to go via a toc adjusting
13732 stub. Other calls that never return could do
13733 the same, if we could detect such. */
13734 can_plt_call = TRUE;
13735 }
13736 }
13737
13738 if (!can_plt_call)
13739 {
13740 /* g++ as of 20130507 emits self-calls without a
13741 following nop. This is arguably wrong since we
13742 have conflicting information. On the one hand a
13743 global symbol and on the other a local call
13744 sequence, but don't error for this special case.
13745 It isn't possible to cheaply verify we have
13746 exactly such a call. Allow all calls to the same
13747 section. */
13748 asection *code_sec = sec;
13749
13750 if (get_opd_info (sec) != NULL)
13751 {
13752 bfd_vma off = (relocation + addend
13753 - sec->output_section->vma
13754 - sec->output_offset);
13755
13756 opd_entry_value (sec, off, &code_sec, NULL, FALSE);
13757 }
13758 if (code_sec == input_section)
13759 can_plt_call = TRUE;
13760 }
13761
13762 if (!can_plt_call)
13763 {
13764 if (stub_entry->stub_type == ppc_stub_plt_call
13765 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
13766 info->callbacks->einfo
13767 (_("%P: %H: call to `%T' lacks nop, can't restore toc; "
13768 "recompile with -fPIC\n"),
13769 input_bfd, input_section, rel->r_offset, sym_name);
13770 else
13771 info->callbacks->einfo
13772 (_("%P: %H: call to `%T' lacks nop, can't restore toc; "
13773 "(-mcmodel=small toc adjust stub)\n"),
13774 input_bfd, input_section, rel->r_offset, sym_name);
13775
13776 bfd_set_error (bfd_error_bad_value);
13777 ret = FALSE;
13778 }
13779
13780 if (can_plt_call
13781 && (stub_entry->stub_type == ppc_stub_plt_call
13782 || stub_entry->stub_type == ppc_stub_plt_call_r2save))
13783 unresolved_reloc = FALSE;
13784 }
13785
13786 if ((stub_entry == NULL
13787 || stub_entry->stub_type == ppc_stub_long_branch
13788 || stub_entry->stub_type == ppc_stub_plt_branch)
13789 && get_opd_info (sec) != NULL)
13790 {
13791 /* The branch destination is the value of the opd entry. */
13792 bfd_vma off = (relocation + addend
13793 - sec->output_section->vma
13794 - sec->output_offset);
13795 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL, FALSE);
13796 if (dest != (bfd_vma) -1)
13797 {
13798 relocation = dest;
13799 addend = 0;
13800 reloc_dest = DEST_OPD;
13801 }
13802 }
13803
13804 /* If the branch is out of reach we ought to have a long
13805 branch stub. */
13806 from = (rel->r_offset
13807 + input_section->output_offset
13808 + input_section->output_section->vma);
13809
13810 relocation += PPC64_LOCAL_ENTRY_OFFSET (fdh
13811 ? fdh->elf.other
13812 : sym->st_other);
13813
13814 if (stub_entry != NULL
13815 && (stub_entry->stub_type == ppc_stub_long_branch
13816 || stub_entry->stub_type == ppc_stub_plt_branch)
13817 && (r_type == R_PPC64_ADDR14_BRTAKEN
13818 || r_type == R_PPC64_ADDR14_BRNTAKEN
13819 || (relocation + addend - from + max_br_offset
13820 < 2 * max_br_offset)))
13821 /* Don't use the stub if this branch is in range. */
13822 stub_entry = NULL;
13823
13824 if (stub_entry != NULL)
13825 {
13826 /* Munge up the value and addend so that we call the stub
13827 rather than the procedure directly. */
13828 relocation = (stub_entry->stub_offset
13829 + stub_entry->stub_sec->output_offset
13830 + stub_entry->stub_sec->output_section->vma);
13831 addend = 0;
13832 reloc_dest = DEST_STUB;
13833
13834 if ((stub_entry->stub_type == ppc_stub_plt_call
13835 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
13836 && (ALWAYS_EMIT_R2SAVE
13837 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
13838 && rel + 1 < relend
13839 && rel[1].r_offset == rel->r_offset + 4
13840 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOCSAVE)
13841 relocation += 4;
13842 }
13843
13844 if (insn != 0)
13845 {
13846 if (is_isa_v2)
13847 {
13848 /* Set 'a' bit. This is 0b00010 in BO field for branch
13849 on CR(BI) insns (BO == 001at or 011at), and 0b01000
13850 for branch on CTR insns (BO == 1a00t or 1a01t). */
13851 if ((insn & (0x14 << 21)) == (0x04 << 21))
13852 insn |= 0x02 << 21;
13853 else if ((insn & (0x14 << 21)) == (0x10 << 21))
13854 insn |= 0x08 << 21;
13855 else
13856 break;
13857 }
13858 else
13859 {
13860 /* Invert 'y' bit if not the default. */
13861 if ((bfd_signed_vma) (relocation + addend - from) < 0)
13862 insn ^= 0x01 << 21;
13863 }
13864
13865 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
13866 }
13867
13868 /* NOP out calls to undefined weak functions.
13869 We can thus call a weak function without first
13870 checking whether the function is defined. */
13871 else if (h != NULL
13872 && h->elf.root.type == bfd_link_hash_undefweak
13873 && h->elf.dynindx == -1
13874 && r_type == R_PPC64_REL24
13875 && relocation == 0
13876 && addend == 0)
13877 {
13878 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
13879 continue;
13880 }
13881 break;
13882 }
13883
13884 /* Set `addend'. */
13885 tls_type = 0;
13886 switch (r_type)
13887 {
13888 default:
13889 info->callbacks->einfo
13890 (_("%P: %B: unknown relocation type %d for `%T'\n"),
13891 input_bfd, (int) r_type, sym_name);
13892
13893 bfd_set_error (bfd_error_bad_value);
13894 ret = FALSE;
13895 continue;
13896
13897 case R_PPC64_NONE:
13898 case R_PPC64_TLS:
13899 case R_PPC64_TLSGD:
13900 case R_PPC64_TLSLD:
13901 case R_PPC64_TOCSAVE:
13902 case R_PPC64_GNU_VTINHERIT:
13903 case R_PPC64_GNU_VTENTRY:
13904 continue;
13905
13906 /* GOT16 relocations. Like an ADDR16 using the symbol's
13907 address in the GOT as relocation value instead of the
13908 symbol's value itself. Also, create a GOT entry for the
13909 symbol and put the symbol value there. */
13910 case R_PPC64_GOT_TLSGD16:
13911 case R_PPC64_GOT_TLSGD16_LO:
13912 case R_PPC64_GOT_TLSGD16_HI:
13913 case R_PPC64_GOT_TLSGD16_HA:
13914 tls_type = TLS_TLS | TLS_GD;
13915 goto dogot;
13916
13917 case R_PPC64_GOT_TLSLD16:
13918 case R_PPC64_GOT_TLSLD16_LO:
13919 case R_PPC64_GOT_TLSLD16_HI:
13920 case R_PPC64_GOT_TLSLD16_HA:
13921 tls_type = TLS_TLS | TLS_LD;
13922 goto dogot;
13923
13924 case R_PPC64_GOT_TPREL16_DS:
13925 case R_PPC64_GOT_TPREL16_LO_DS:
13926 case R_PPC64_GOT_TPREL16_HI:
13927 case R_PPC64_GOT_TPREL16_HA:
13928 tls_type = TLS_TLS | TLS_TPREL;
13929 goto dogot;
13930
13931 case R_PPC64_GOT_DTPREL16_DS:
13932 case R_PPC64_GOT_DTPREL16_LO_DS:
13933 case R_PPC64_GOT_DTPREL16_HI:
13934 case R_PPC64_GOT_DTPREL16_HA:
13935 tls_type = TLS_TLS | TLS_DTPREL;
13936 goto dogot;
13937
13938 case R_PPC64_GOT16:
13939 case R_PPC64_GOT16_LO:
13940 case R_PPC64_GOT16_HI:
13941 case R_PPC64_GOT16_HA:
13942 case R_PPC64_GOT16_DS:
13943 case R_PPC64_GOT16_LO_DS:
13944 dogot:
13945 {
13946 /* Relocation is to the entry for this symbol in the global
13947 offset table. */
13948 asection *got;
13949 bfd_vma *offp;
13950 bfd_vma off;
13951 unsigned long indx = 0;
13952 struct got_entry *ent;
13953
13954 if (tls_type == (TLS_TLS | TLS_LD)
13955 && (h == NULL
13956 || !h->elf.def_dynamic))
13957 ent = ppc64_tlsld_got (input_bfd);
13958 else
13959 {
13960
13961 if (h != NULL)
13962 {
13963 bfd_boolean dyn = htab->elf.dynamic_sections_created;
13964 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared,
13965 &h->elf)
13966 || (info->shared
13967 && SYMBOL_REFERENCES_LOCAL (info, &h->elf)))
13968 /* This is actually a static link, or it is a
13969 -Bsymbolic link and the symbol is defined
13970 locally, or the symbol was forced to be local
13971 because of a version file. */
13972 ;
13973 else
13974 {
13975 BFD_ASSERT (h->elf.dynindx != -1);
13976 indx = h->elf.dynindx;
13977 unresolved_reloc = FALSE;
13978 }
13979 ent = h->elf.got.glist;
13980 }
13981 else
13982 {
13983 if (local_got_ents == NULL)
13984 abort ();
13985 ent = local_got_ents[r_symndx];
13986 }
13987
13988 for (; ent != NULL; ent = ent->next)
13989 if (ent->addend == orig_rel.r_addend
13990 && ent->owner == input_bfd
13991 && ent->tls_type == tls_type)
13992 break;
13993 }
13994
13995 if (ent == NULL)
13996 abort ();
13997 if (ent->is_indirect)
13998 ent = ent->got.ent;
13999 offp = &ent->got.offset;
14000 got = ppc64_elf_tdata (ent->owner)->got;
14001 if (got == NULL)
14002 abort ();
14003
14004 /* The offset must always be a multiple of 8. We use the
14005 least significant bit to record whether we have already
14006 processed this entry. */
14007 off = *offp;
14008 if ((off & 1) != 0)
14009 off &= ~1;
14010 else
14011 {
14012 /* Generate relocs for the dynamic linker, except in
14013 the case of TLSLD where we'll use one entry per
14014 module. */
14015 asection *relgot;
14016 bfd_boolean ifunc;
14017
14018 *offp = off | 1;
14019 relgot = NULL;
14020 ifunc = (h != NULL
14021 ? h->elf.type == STT_GNU_IFUNC
14022 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC);
14023 if (ifunc)
14024 relgot = htab->elf.irelplt;
14025 else if ((info->shared || indx != 0)
14026 && (h == NULL
14027 || (tls_type == (TLS_TLS | TLS_LD)
14028 && !h->elf.def_dynamic)
14029 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
14030 || h->elf.root.type != bfd_link_hash_undefweak))
14031 relgot = ppc64_elf_tdata (ent->owner)->relgot;
14032 if (relgot != NULL)
14033 {
14034 outrel.r_offset = (got->output_section->vma
14035 + got->output_offset
14036 + off);
14037 outrel.r_addend = addend;
14038 if (tls_type & (TLS_LD | TLS_GD))
14039 {
14040 outrel.r_addend = 0;
14041 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
14042 if (tls_type == (TLS_TLS | TLS_GD))
14043 {
14044 loc = relgot->contents;
14045 loc += (relgot->reloc_count++
14046 * sizeof (Elf64_External_Rela));
14047 bfd_elf64_swap_reloca_out (output_bfd,
14048 &outrel, loc);
14049 outrel.r_offset += 8;
14050 outrel.r_addend = addend;
14051 outrel.r_info
14052 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
14053 }
14054 }
14055 else if (tls_type == (TLS_TLS | TLS_DTPREL))
14056 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
14057 else if (tls_type == (TLS_TLS | TLS_TPREL))
14058 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
14059 else if (indx != 0)
14060 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
14061 else
14062 {
14063 if (ifunc)
14064 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
14065 else
14066 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
14067
14068 /* Write the .got section contents for the sake
14069 of prelink. */
14070 loc = got->contents + off;
14071 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
14072 loc);
14073 }
14074
14075 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
14076 {
14077 outrel.r_addend += relocation;
14078 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
14079 outrel.r_addend -= htab->elf.tls_sec->vma;
14080 }
14081 loc = relgot->contents;
14082 loc += (relgot->reloc_count++
14083 * sizeof (Elf64_External_Rela));
14084 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
14085 }
14086
14087 /* Init the .got section contents here if we're not
14088 emitting a reloc. */
14089 else
14090 {
14091 relocation += addend;
14092 if (tls_type == (TLS_TLS | TLS_LD))
14093 relocation = 1;
14094 else if (tls_type != 0)
14095 {
14096 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
14097 if (tls_type == (TLS_TLS | TLS_TPREL))
14098 relocation += DTP_OFFSET - TP_OFFSET;
14099
14100 if (tls_type == (TLS_TLS | TLS_GD))
14101 {
14102 bfd_put_64 (output_bfd, relocation,
14103 got->contents + off + 8);
14104 relocation = 1;
14105 }
14106 }
14107
14108 bfd_put_64 (output_bfd, relocation,
14109 got->contents + off);
14110 }
14111 }
14112
14113 if (off >= (bfd_vma) -2)
14114 abort ();
14115
14116 relocation = got->output_section->vma + got->output_offset + off;
14117 addend = -(TOCstart + htab->stub_group[input_section->id].toc_off);
14118 }
14119 break;
14120
14121 case R_PPC64_PLT16_HA:
14122 case R_PPC64_PLT16_HI:
14123 case R_PPC64_PLT16_LO:
14124 case R_PPC64_PLT32:
14125 case R_PPC64_PLT64:
14126 /* Relocation is to the entry for this symbol in the
14127 procedure linkage table. */
14128
14129 /* Resolve a PLT reloc against a local symbol directly,
14130 without using the procedure linkage table. */
14131 if (h == NULL)
14132 break;
14133
14134 /* It's possible that we didn't make a PLT entry for this
14135 symbol. This happens when statically linking PIC code,
14136 or when using -Bsymbolic. Go find a match if there is a
14137 PLT entry. */
14138 if (htab->elf.splt != NULL)
14139 {
14140 struct plt_entry *ent;
14141 for (ent = h->elf.plt.plist; ent != NULL; ent = ent->next)
14142 if (ent->plt.offset != (bfd_vma) -1
14143 && ent->addend == orig_rel.r_addend)
14144 {
14145 relocation = (htab->elf.splt->output_section->vma
14146 + htab->elf.splt->output_offset
14147 + ent->plt.offset);
14148 unresolved_reloc = FALSE;
14149 break;
14150 }
14151 }
14152 break;
14153
14154 case R_PPC64_TOC:
14155 /* Relocation value is TOC base. */
14156 relocation = TOCstart;
14157 if (r_symndx == STN_UNDEF)
14158 relocation += htab->stub_group[input_section->id].toc_off;
14159 else if (unresolved_reloc)
14160 ;
14161 else if (sec != NULL && sec->id <= htab->top_id)
14162 relocation += htab->stub_group[sec->id].toc_off;
14163 else
14164 unresolved_reloc = TRUE;
14165 goto dodyn;
14166
14167 /* TOC16 relocs. We want the offset relative to the TOC base,
14168 which is the address of the start of the TOC plus 0x8000.
14169 The TOC consists of sections .got, .toc, .tocbss, and .plt,
14170 in this order. */
14171 case R_PPC64_TOC16:
14172 case R_PPC64_TOC16_LO:
14173 case R_PPC64_TOC16_HI:
14174 case R_PPC64_TOC16_DS:
14175 case R_PPC64_TOC16_LO_DS:
14176 case R_PPC64_TOC16_HA:
14177 addend -= TOCstart + htab->stub_group[input_section->id].toc_off;
14178 break;
14179
14180 /* Relocate against the beginning of the section. */
14181 case R_PPC64_SECTOFF:
14182 case R_PPC64_SECTOFF_LO:
14183 case R_PPC64_SECTOFF_HI:
14184 case R_PPC64_SECTOFF_DS:
14185 case R_PPC64_SECTOFF_LO_DS:
14186 case R_PPC64_SECTOFF_HA:
14187 if (sec != NULL)
14188 addend -= sec->output_section->vma;
14189 break;
14190
14191 case R_PPC64_REL16:
14192 case R_PPC64_REL16_LO:
14193 case R_PPC64_REL16_HI:
14194 case R_PPC64_REL16_HA:
14195 break;
14196
14197 case R_PPC64_REL14:
14198 case R_PPC64_REL14_BRNTAKEN:
14199 case R_PPC64_REL14_BRTAKEN:
14200 case R_PPC64_REL24:
14201 break;
14202
14203 case R_PPC64_TPREL16:
14204 case R_PPC64_TPREL16_LO:
14205 case R_PPC64_TPREL16_HI:
14206 case R_PPC64_TPREL16_HA:
14207 case R_PPC64_TPREL16_DS:
14208 case R_PPC64_TPREL16_LO_DS:
14209 case R_PPC64_TPREL16_HIGH:
14210 case R_PPC64_TPREL16_HIGHA:
14211 case R_PPC64_TPREL16_HIGHER:
14212 case R_PPC64_TPREL16_HIGHERA:
14213 case R_PPC64_TPREL16_HIGHEST:
14214 case R_PPC64_TPREL16_HIGHESTA:
14215 if (h != NULL
14216 && h->elf.root.type == bfd_link_hash_undefweak
14217 && h->elf.dynindx == -1)
14218 {
14219 /* Make this relocation against an undefined weak symbol
14220 resolve to zero. This is really just a tweak, since
14221 code using weak externs ought to check that they are
14222 defined before using them. */
14223 bfd_byte *p = contents + rel->r_offset - d_offset;
14224
14225 insn = bfd_get_32 (output_bfd, p);
14226 insn = _bfd_elf_ppc_at_tprel_transform (insn, 13);
14227 if (insn != 0)
14228 bfd_put_32 (output_bfd, insn, p);
14229 break;
14230 }
14231 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
14232 if (info->shared)
14233 /* The TPREL16 relocs shouldn't really be used in shared
14234 libs as they will result in DT_TEXTREL being set, but
14235 support them anyway. */
14236 goto dodyn;
14237 break;
14238
14239 case R_PPC64_DTPREL16:
14240 case R_PPC64_DTPREL16_LO:
14241 case R_PPC64_DTPREL16_HI:
14242 case R_PPC64_DTPREL16_HA:
14243 case R_PPC64_DTPREL16_DS:
14244 case R_PPC64_DTPREL16_LO_DS:
14245 case R_PPC64_DTPREL16_HIGH:
14246 case R_PPC64_DTPREL16_HIGHA:
14247 case R_PPC64_DTPREL16_HIGHER:
14248 case R_PPC64_DTPREL16_HIGHERA:
14249 case R_PPC64_DTPREL16_HIGHEST:
14250 case R_PPC64_DTPREL16_HIGHESTA:
14251 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
14252 break;
14253
14254 case R_PPC64_ADDR64_LOCAL:
14255 addend += PPC64_LOCAL_ENTRY_OFFSET (h != NULL
14256 ? h->elf.other
14257 : sym->st_other);
14258 break;
14259
14260 case R_PPC64_DTPMOD64:
14261 relocation = 1;
14262 addend = 0;
14263 goto dodyn;
14264
14265 case R_PPC64_TPREL64:
14266 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
14267 goto dodyn;
14268
14269 case R_PPC64_DTPREL64:
14270 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
14271 /* Fall thru */
14272
14273 /* Relocations that may need to be propagated if this is a
14274 dynamic object. */
14275 case R_PPC64_REL30:
14276 case R_PPC64_REL32:
14277 case R_PPC64_REL64:
14278 case R_PPC64_ADDR14:
14279 case R_PPC64_ADDR14_BRNTAKEN:
14280 case R_PPC64_ADDR14_BRTAKEN:
14281 case R_PPC64_ADDR16:
14282 case R_PPC64_ADDR16_DS:
14283 case R_PPC64_ADDR16_HA:
14284 case R_PPC64_ADDR16_HI:
14285 case R_PPC64_ADDR16_HIGH:
14286 case R_PPC64_ADDR16_HIGHA:
14287 case R_PPC64_ADDR16_HIGHER:
14288 case R_PPC64_ADDR16_HIGHERA:
14289 case R_PPC64_ADDR16_HIGHEST:
14290 case R_PPC64_ADDR16_HIGHESTA:
14291 case R_PPC64_ADDR16_LO:
14292 case R_PPC64_ADDR16_LO_DS:
14293 case R_PPC64_ADDR24:
14294 case R_PPC64_ADDR32:
14295 case R_PPC64_ADDR64:
14296 case R_PPC64_UADDR16:
14297 case R_PPC64_UADDR32:
14298 case R_PPC64_UADDR64:
14299 dodyn:
14300 if ((input_section->flags & SEC_ALLOC) == 0)
14301 break;
14302
14303 if (NO_OPD_RELOCS && is_opd)
14304 break;
14305
14306 if ((info->shared
14307 && (h == NULL
14308 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
14309 || h->elf.root.type != bfd_link_hash_undefweak)
14310 && (must_be_dyn_reloc (info, r_type)
14311 || !SYMBOL_CALLS_LOCAL (info, &h->elf)))
14312 || (ELIMINATE_COPY_RELOCS
14313 && !info->shared
14314 && h != NULL
14315 && h->elf.dynindx != -1
14316 && !h->elf.non_got_ref
14317 && !h->elf.def_regular)
14318 || (!info->shared
14319 && (h != NULL
14320 ? h->elf.type == STT_GNU_IFUNC
14321 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)))
14322 {
14323 bfd_boolean skip, relocate;
14324 asection *sreloc;
14325 bfd_vma out_off;
14326
14327 /* When generating a dynamic object, these relocations
14328 are copied into the output file to be resolved at run
14329 time. */
14330
14331 skip = FALSE;
14332 relocate = FALSE;
14333
14334 out_off = _bfd_elf_section_offset (output_bfd, info,
14335 input_section, rel->r_offset);
14336 if (out_off == (bfd_vma) -1)
14337 skip = TRUE;
14338 else if (out_off == (bfd_vma) -2)
14339 skip = TRUE, relocate = TRUE;
14340 out_off += (input_section->output_section->vma
14341 + input_section->output_offset);
14342 outrel.r_offset = out_off;
14343 outrel.r_addend = rel->r_addend;
14344
14345 /* Optimize unaligned reloc use. */
14346 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
14347 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
14348 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
14349 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
14350 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
14351 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
14352 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
14353 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
14354 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
14355
14356 if (skip)
14357 memset (&outrel, 0, sizeof outrel);
14358 else if (!SYMBOL_REFERENCES_LOCAL (info, &h->elf)
14359 && !is_opd
14360 && r_type != R_PPC64_TOC)
14361 {
14362 BFD_ASSERT (h->elf.dynindx != -1);
14363 outrel.r_info = ELF64_R_INFO (h->elf.dynindx, r_type);
14364 }
14365 else
14366 {
14367 /* This symbol is local, or marked to become local,
14368 or this is an opd section reloc which must point
14369 at a local function. */
14370 outrel.r_addend += relocation;
14371 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
14372 {
14373 if (is_opd && h != NULL)
14374 {
14375 /* Lie about opd entries. This case occurs
14376 when building shared libraries and we
14377 reference a function in another shared
14378 lib. The same thing happens for a weak
14379 definition in an application that's
14380 overridden by a strong definition in a
14381 shared lib. (I believe this is a generic
14382 bug in binutils handling of weak syms.)
14383 In these cases we won't use the opd
14384 entry in this lib. */
14385 unresolved_reloc = FALSE;
14386 }
14387 if (!is_opd
14388 && r_type == R_PPC64_ADDR64
14389 && (h != NULL
14390 ? h->elf.type == STT_GNU_IFUNC
14391 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
14392 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
14393 else
14394 {
14395 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
14396
14397 /* We need to relocate .opd contents for ld.so.
14398 Prelink also wants simple and consistent rules
14399 for relocs. This make all RELATIVE relocs have
14400 *r_offset equal to r_addend. */
14401 relocate = TRUE;
14402 }
14403 }
14404 else
14405 {
14406 long indx = 0;
14407
14408 if (h != NULL
14409 ? h->elf.type == STT_GNU_IFUNC
14410 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
14411 {
14412 info->callbacks->einfo
14413 (_("%P: %H: %s for indirect "
14414 "function `%T' unsupported\n"),
14415 input_bfd, input_section, rel->r_offset,
14416 ppc64_elf_howto_table[r_type]->name,
14417 sym_name);
14418 ret = FALSE;
14419 }
14420 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
14421 ;
14422 else if (sec == NULL || sec->owner == NULL)
14423 {
14424 bfd_set_error (bfd_error_bad_value);
14425 return FALSE;
14426 }
14427 else
14428 {
14429 asection *osec;
14430
14431 osec = sec->output_section;
14432 indx = elf_section_data (osec)->dynindx;
14433
14434 if (indx == 0)
14435 {
14436 if ((osec->flags & SEC_READONLY) == 0
14437 && htab->elf.data_index_section != NULL)
14438 osec = htab->elf.data_index_section;
14439 else
14440 osec = htab->elf.text_index_section;
14441 indx = elf_section_data (osec)->dynindx;
14442 }
14443 BFD_ASSERT (indx != 0);
14444
14445 /* We are turning this relocation into one
14446 against a section symbol, so subtract out
14447 the output section's address but not the
14448 offset of the input section in the output
14449 section. */
14450 outrel.r_addend -= osec->vma;
14451 }
14452
14453 outrel.r_info = ELF64_R_INFO (indx, r_type);
14454 }
14455 }
14456
14457 sreloc = elf_section_data (input_section)->sreloc;
14458 if (h != NULL
14459 ? h->elf.type == STT_GNU_IFUNC
14460 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
14461 sreloc = htab->elf.irelplt;
14462 if (sreloc == NULL)
14463 abort ();
14464
14465 if (sreloc->reloc_count * sizeof (Elf64_External_Rela)
14466 >= sreloc->size)
14467 abort ();
14468 loc = sreloc->contents;
14469 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
14470 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
14471
14472 /* If this reloc is against an external symbol, it will
14473 be computed at runtime, so there's no need to do
14474 anything now. However, for the sake of prelink ensure
14475 that the section contents are a known value. */
14476 if (! relocate)
14477 {
14478 unresolved_reloc = FALSE;
14479 /* The value chosen here is quite arbitrary as ld.so
14480 ignores section contents except for the special
14481 case of .opd where the contents might be accessed
14482 before relocation. Choose zero, as that won't
14483 cause reloc overflow. */
14484 relocation = 0;
14485 addend = 0;
14486 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
14487 to improve backward compatibility with older
14488 versions of ld. */
14489 if (r_type == R_PPC64_ADDR64)
14490 addend = outrel.r_addend;
14491 /* Adjust pc_relative relocs to have zero in *r_offset. */
14492 else if (ppc64_elf_howto_table[r_type]->pc_relative)
14493 addend = (input_section->output_section->vma
14494 + input_section->output_offset
14495 + rel->r_offset);
14496 }
14497 }
14498 break;
14499
14500 case R_PPC64_COPY:
14501 case R_PPC64_GLOB_DAT:
14502 case R_PPC64_JMP_SLOT:
14503 case R_PPC64_JMP_IREL:
14504 case R_PPC64_RELATIVE:
14505 /* We shouldn't ever see these dynamic relocs in relocatable
14506 files. */
14507 /* Fall through. */
14508
14509 case R_PPC64_PLTGOT16:
14510 case R_PPC64_PLTGOT16_DS:
14511 case R_PPC64_PLTGOT16_HA:
14512 case R_PPC64_PLTGOT16_HI:
14513 case R_PPC64_PLTGOT16_LO:
14514 case R_PPC64_PLTGOT16_LO_DS:
14515 case R_PPC64_PLTREL32:
14516 case R_PPC64_PLTREL64:
14517 /* These ones haven't been implemented yet. */
14518
14519 info->callbacks->einfo
14520 (_("%P: %B: %s is not supported for `%T'\n"),
14521 input_bfd,
14522 ppc64_elf_howto_table[r_type]->name, sym_name);
14523
14524 bfd_set_error (bfd_error_invalid_operation);
14525 ret = FALSE;
14526 continue;
14527 }
14528
14529 /* Multi-instruction sequences that access the TOC can be
14530 optimized, eg. addis ra,r2,0; addi rb,ra,x;
14531 to nop; addi rb,r2,x; */
14532 switch (r_type)
14533 {
14534 default:
14535 break;
14536
14537 case R_PPC64_GOT_TLSLD16_HI:
14538 case R_PPC64_GOT_TLSGD16_HI:
14539 case R_PPC64_GOT_TPREL16_HI:
14540 case R_PPC64_GOT_DTPREL16_HI:
14541 case R_PPC64_GOT16_HI:
14542 case R_PPC64_TOC16_HI:
14543 /* These relocs would only be useful if building up an
14544 offset to later add to r2, perhaps in an indexed
14545 addressing mode instruction. Don't try to optimize.
14546 Unfortunately, the possibility of someone building up an
14547 offset like this or even with the HA relocs, means that
14548 we need to check the high insn when optimizing the low
14549 insn. */
14550 break;
14551
14552 case R_PPC64_GOT_TLSLD16_HA:
14553 case R_PPC64_GOT_TLSGD16_HA:
14554 case R_PPC64_GOT_TPREL16_HA:
14555 case R_PPC64_GOT_DTPREL16_HA:
14556 case R_PPC64_GOT16_HA:
14557 case R_PPC64_TOC16_HA:
14558 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
14559 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
14560 {
14561 bfd_byte *p = contents + (rel->r_offset & ~3);
14562 bfd_put_32 (input_bfd, NOP, p);
14563 }
14564 break;
14565
14566 case R_PPC64_GOT_TLSLD16_LO:
14567 case R_PPC64_GOT_TLSGD16_LO:
14568 case R_PPC64_GOT_TPREL16_LO_DS:
14569 case R_PPC64_GOT_DTPREL16_LO_DS:
14570 case R_PPC64_GOT16_LO:
14571 case R_PPC64_GOT16_LO_DS:
14572 case R_PPC64_TOC16_LO:
14573 case R_PPC64_TOC16_LO_DS:
14574 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
14575 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
14576 {
14577 bfd_byte *p = contents + (rel->r_offset & ~3);
14578 insn = bfd_get_32 (input_bfd, p);
14579 if ((insn & (0x3f << 26)) == 12u << 26 /* addic */)
14580 {
14581 /* Transform addic to addi when we change reg. */
14582 insn &= ~((0x3f << 26) | (0x1f << 16));
14583 insn |= (14u << 26) | (2 << 16);
14584 }
14585 else
14586 {
14587 insn &= ~(0x1f << 16);
14588 insn |= 2 << 16;
14589 }
14590 bfd_put_32 (input_bfd, insn, p);
14591 }
14592 break;
14593 }
14594
14595 /* Do any further special processing. */
14596 howto = ppc64_elf_howto_table[(int) r_type];
14597 switch (r_type)
14598 {
14599 default:
14600 break;
14601
14602 case R_PPC64_REL16_HA:
14603 case R_PPC64_ADDR16_HA:
14604 case R_PPC64_ADDR16_HIGHA:
14605 case R_PPC64_ADDR16_HIGHERA:
14606 case R_PPC64_ADDR16_HIGHESTA:
14607 case R_PPC64_TOC16_HA:
14608 case R_PPC64_SECTOFF_HA:
14609 case R_PPC64_TPREL16_HA:
14610 case R_PPC64_TPREL16_HIGHA:
14611 case R_PPC64_TPREL16_HIGHERA:
14612 case R_PPC64_TPREL16_HIGHESTA:
14613 case R_PPC64_DTPREL16_HA:
14614 case R_PPC64_DTPREL16_HIGHA:
14615 case R_PPC64_DTPREL16_HIGHERA:
14616 case R_PPC64_DTPREL16_HIGHESTA:
14617 /* It's just possible that this symbol is a weak symbol
14618 that's not actually defined anywhere. In that case,
14619 'sec' would be NULL, and we should leave the symbol
14620 alone (it will be set to zero elsewhere in the link). */
14621 if (sec == NULL)
14622 break;
14623 /* Fall thru */
14624
14625 case R_PPC64_GOT16_HA:
14626 case R_PPC64_PLTGOT16_HA:
14627 case R_PPC64_PLT16_HA:
14628 case R_PPC64_GOT_TLSGD16_HA:
14629 case R_PPC64_GOT_TLSLD16_HA:
14630 case R_PPC64_GOT_TPREL16_HA:
14631 case R_PPC64_GOT_DTPREL16_HA:
14632 /* Add 0x10000 if sign bit in 0:15 is set.
14633 Bits 0:15 are not used. */
14634 addend += 0x8000;
14635 break;
14636
14637 case R_PPC64_ADDR16_DS:
14638 case R_PPC64_ADDR16_LO_DS:
14639 case R_PPC64_GOT16_DS:
14640 case R_PPC64_GOT16_LO_DS:
14641 case R_PPC64_PLT16_LO_DS:
14642 case R_PPC64_SECTOFF_DS:
14643 case R_PPC64_SECTOFF_LO_DS:
14644 case R_PPC64_TOC16_DS:
14645 case R_PPC64_TOC16_LO_DS:
14646 case R_PPC64_PLTGOT16_DS:
14647 case R_PPC64_PLTGOT16_LO_DS:
14648 case R_PPC64_GOT_TPREL16_DS:
14649 case R_PPC64_GOT_TPREL16_LO_DS:
14650 case R_PPC64_GOT_DTPREL16_DS:
14651 case R_PPC64_GOT_DTPREL16_LO_DS:
14652 case R_PPC64_TPREL16_DS:
14653 case R_PPC64_TPREL16_LO_DS:
14654 case R_PPC64_DTPREL16_DS:
14655 case R_PPC64_DTPREL16_LO_DS:
14656 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
14657 mask = 3;
14658 /* If this reloc is against an lq insn, then the value must be
14659 a multiple of 16. This is somewhat of a hack, but the
14660 "correct" way to do this by defining _DQ forms of all the
14661 _DS relocs bloats all reloc switches in this file. It
14662 doesn't seem to make much sense to use any of these relocs
14663 in data, so testing the insn should be safe. */
14664 if ((insn & (0x3f << 26)) == (56u << 26))
14665 mask = 15;
14666 if (((relocation + addend) & mask) != 0)
14667 {
14668 info->callbacks->einfo
14669 (_("%P: %H: error: %s not a multiple of %u\n"),
14670 input_bfd, input_section, rel->r_offset,
14671 howto->name,
14672 mask + 1);
14673 bfd_set_error (bfd_error_bad_value);
14674 ret = FALSE;
14675 continue;
14676 }
14677 break;
14678 }
14679
14680 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
14681 because such sections are not SEC_ALLOC and thus ld.so will
14682 not process them. */
14683 if (unresolved_reloc
14684 && !((input_section->flags & SEC_DEBUGGING) != 0
14685 && h->elf.def_dynamic)
14686 && _bfd_elf_section_offset (output_bfd, info, input_section,
14687 rel->r_offset) != (bfd_vma) -1)
14688 {
14689 info->callbacks->einfo
14690 (_("%P: %H: unresolvable %s against `%T'\n"),
14691 input_bfd, input_section, rel->r_offset,
14692 howto->name,
14693 h->elf.root.root.string);
14694 ret = FALSE;
14695 }
14696
14697 /* 16-bit fields in insns mostly have signed values, but a
14698 few insns have 16-bit unsigned values. Really, we should
14699 have different reloc types. */
14700 if (howto->complain_on_overflow != complain_overflow_dont
14701 && howto->dst_mask == 0xffff
14702 && (input_section->flags & SEC_CODE) != 0)
14703 {
14704 enum complain_overflow complain = complain_overflow_signed;
14705
14706 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
14707 if ((insn & (0x3f << 26)) == 10u << 26 /* cmpli */)
14708 complain = complain_overflow_bitfield;
14709 else if (howto->rightshift == 0
14710 ? ((insn & (0x3f << 26)) == 28u << 26 /* andi */
14711 || (insn & (0x3f << 26)) == 24u << 26 /* ori */
14712 || (insn & (0x3f << 26)) == 26u << 26 /* xori */)
14713 : ((insn & (0x3f << 26)) == 29u << 26 /* andis */
14714 || (insn & (0x3f << 26)) == 25u << 26 /* oris */
14715 || (insn & (0x3f << 26)) == 27u << 26 /* xoris */))
14716 complain = complain_overflow_unsigned;
14717 if (howto->complain_on_overflow != complain)
14718 {
14719 alt_howto = *howto;
14720 alt_howto.complain_on_overflow = complain;
14721 howto = &alt_howto;
14722 }
14723 }
14724
14725 r = _bfd_final_link_relocate (howto, input_bfd, input_section, contents,
14726 rel->r_offset, relocation, addend);
14727
14728 if (r != bfd_reloc_ok)
14729 {
14730 char *more_info = NULL;
14731 const char *reloc_name = howto->name;
14732
14733 if (reloc_dest != DEST_NORMAL)
14734 {
14735 more_info = bfd_malloc (strlen (reloc_name) + 8);
14736 if (more_info != NULL)
14737 {
14738 strcpy (more_info, reloc_name);
14739 strcat (more_info, (reloc_dest == DEST_OPD
14740 ? " (OPD)" : " (stub)"));
14741 reloc_name = more_info;
14742 }
14743 }
14744
14745 if (r == bfd_reloc_overflow)
14746 {
14747 if (warned)
14748 continue;
14749 if (h != NULL
14750 && h->elf.root.type == bfd_link_hash_undefweak
14751 && howto->pc_relative)
14752 {
14753 /* Assume this is a call protected by other code that
14754 detects the symbol is undefined. If this is the case,
14755 we can safely ignore the overflow. If not, the
14756 program is hosed anyway, and a little warning isn't
14757 going to help. */
14758
14759 continue;
14760 }
14761
14762 if (!((*info->callbacks->reloc_overflow)
14763 (info, &h->elf.root, sym_name,
14764 reloc_name, orig_rel.r_addend,
14765 input_bfd, input_section, rel->r_offset)))
14766 return FALSE;
14767 }
14768 else
14769 {
14770 info->callbacks->einfo
14771 (_("%P: %H: %s against `%T': error %d\n"),
14772 input_bfd, input_section, rel->r_offset,
14773 reloc_name, sym_name, (int) r);
14774 ret = FALSE;
14775 }
14776 if (more_info != NULL)
14777 free (more_info);
14778 }
14779 }
14780
14781 /* If we're emitting relocations, then shortly after this function
14782 returns, reloc offsets and addends for this section will be
14783 adjusted. Worse, reloc symbol indices will be for the output
14784 file rather than the input. Save a copy of the relocs for
14785 opd_entry_value. */
14786 if (is_opd && (info->emitrelocations || info->relocatable))
14787 {
14788 bfd_size_type amt;
14789 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
14790 rel = bfd_alloc (input_bfd, amt);
14791 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd.relocs == NULL);
14792 ppc64_elf_tdata (input_bfd)->opd.relocs = rel;
14793 if (rel == NULL)
14794 return FALSE;
14795 memcpy (rel, relocs, amt);
14796 }
14797 return ret;
14798 }
14799
14800 /* Adjust the value of any local symbols in opd sections. */
14801
14802 static int
14803 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
14804 const char *name ATTRIBUTE_UNUSED,
14805 Elf_Internal_Sym *elfsym,
14806 asection *input_sec,
14807 struct elf_link_hash_entry *h)
14808 {
14809 struct _opd_sec_data *opd;
14810 long adjust;
14811 bfd_vma value;
14812
14813 if (h != NULL)
14814 return 1;
14815
14816 opd = get_opd_info (input_sec);
14817 if (opd == NULL || opd->adjust == NULL)
14818 return 1;
14819
14820 value = elfsym->st_value - input_sec->output_offset;
14821 if (!info->relocatable)
14822 value -= input_sec->output_section->vma;
14823
14824 adjust = opd->adjust[value / 8];
14825 if (adjust == -1)
14826 return 2;
14827
14828 elfsym->st_value += adjust;
14829 return 1;
14830 }
14831
14832 /* Finish up dynamic symbol handling. We set the contents of various
14833 dynamic sections here. */
14834
14835 static bfd_boolean
14836 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
14837 struct bfd_link_info *info,
14838 struct elf_link_hash_entry *h,
14839 Elf_Internal_Sym *sym ATTRIBUTE_UNUSED)
14840 {
14841 struct ppc_link_hash_table *htab;
14842 struct plt_entry *ent;
14843 Elf_Internal_Rela rela;
14844 bfd_byte *loc;
14845
14846 htab = ppc_hash_table (info);
14847 if (htab == NULL)
14848 return FALSE;
14849
14850 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
14851 if (ent->plt.offset != (bfd_vma) -1)
14852 {
14853 /* This symbol has an entry in the procedure linkage
14854 table. Set it up. */
14855 if (!htab->elf.dynamic_sections_created
14856 || h->dynindx == -1)
14857 {
14858 BFD_ASSERT (h->type == STT_GNU_IFUNC
14859 && h->def_regular
14860 && (h->root.type == bfd_link_hash_defined
14861 || h->root.type == bfd_link_hash_defweak));
14862 rela.r_offset = (htab->elf.iplt->output_section->vma
14863 + htab->elf.iplt->output_offset
14864 + ent->plt.offset);
14865 if (htab->opd_abi)
14866 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
14867 else
14868 rela.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
14869 rela.r_addend = (h->root.u.def.value
14870 + h->root.u.def.section->output_offset
14871 + h->root.u.def.section->output_section->vma
14872 + ent->addend);
14873 loc = (htab->elf.irelplt->contents
14874 + (htab->elf.irelplt->reloc_count++
14875 * sizeof (Elf64_External_Rela)));
14876 }
14877 else
14878 {
14879 rela.r_offset = (htab->elf.splt->output_section->vma
14880 + htab->elf.splt->output_offset
14881 + ent->plt.offset);
14882 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
14883 rela.r_addend = ent->addend;
14884 loc = (htab->elf.srelplt->contents
14885 + ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE (htab))
14886 / PLT_ENTRY_SIZE (htab) * sizeof (Elf64_External_Rela)));
14887 }
14888 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
14889
14890 if (!htab->opd_abi)
14891 {
14892 if (!h->def_regular)
14893 {
14894 /* Mark the symbol as undefined, rather than as
14895 defined in glink. Leave the value if there were
14896 any relocations where pointer equality matters
14897 (this is a clue for the dynamic linker, to make
14898 function pointer comparisons work between an
14899 application and shared library), otherwise set it
14900 to zero. */
14901 sym->st_shndx = SHN_UNDEF;
14902 if (!h->pointer_equality_needed)
14903 sym->st_value = 0;
14904 else if (!h->ref_regular_nonweak)
14905 {
14906 /* This breaks function pointer comparisons, but
14907 that is better than breaking tests for a NULL
14908 function pointer. */
14909 sym->st_value = 0;
14910 }
14911 }
14912 }
14913 }
14914
14915 if (h->needs_copy)
14916 {
14917 /* This symbol needs a copy reloc. Set it up. */
14918
14919 if (h->dynindx == -1
14920 || (h->root.type != bfd_link_hash_defined
14921 && h->root.type != bfd_link_hash_defweak)
14922 || htab->relbss == NULL)
14923 abort ();
14924
14925 rela.r_offset = (h->root.u.def.value
14926 + h->root.u.def.section->output_section->vma
14927 + h->root.u.def.section->output_offset);
14928 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
14929 rela.r_addend = 0;
14930 loc = htab->relbss->contents;
14931 loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela);
14932 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
14933 }
14934
14935 return TRUE;
14936 }
14937
14938 /* Used to decide how to sort relocs in an optimal manner for the
14939 dynamic linker, before writing them out. */
14940
14941 static enum elf_reloc_type_class
14942 ppc64_elf_reloc_type_class (const struct bfd_link_info *info,
14943 const asection *rel_sec,
14944 const Elf_Internal_Rela *rela)
14945 {
14946 enum elf_ppc64_reloc_type r_type;
14947 struct ppc_link_hash_table *htab = ppc_hash_table (info);
14948
14949 if (rel_sec == htab->elf.irelplt)
14950 return reloc_class_ifunc;
14951
14952 r_type = ELF64_R_TYPE (rela->r_info);
14953 switch (r_type)
14954 {
14955 case R_PPC64_RELATIVE:
14956 return reloc_class_relative;
14957 case R_PPC64_JMP_SLOT:
14958 return reloc_class_plt;
14959 case R_PPC64_COPY:
14960 return reloc_class_copy;
14961 default:
14962 return reloc_class_normal;
14963 }
14964 }
14965
14966 /* Finish up the dynamic sections. */
14967
14968 static bfd_boolean
14969 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
14970 struct bfd_link_info *info)
14971 {
14972 struct ppc_link_hash_table *htab;
14973 bfd *dynobj;
14974 asection *sdyn;
14975
14976 htab = ppc_hash_table (info);
14977 if (htab == NULL)
14978 return FALSE;
14979
14980 dynobj = htab->elf.dynobj;
14981 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
14982
14983 if (htab->elf.dynamic_sections_created)
14984 {
14985 Elf64_External_Dyn *dyncon, *dynconend;
14986
14987 if (sdyn == NULL || htab->elf.sgot == NULL)
14988 abort ();
14989
14990 dyncon = (Elf64_External_Dyn *) sdyn->contents;
14991 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
14992 for (; dyncon < dynconend; dyncon++)
14993 {
14994 Elf_Internal_Dyn dyn;
14995 asection *s;
14996
14997 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
14998
14999 switch (dyn.d_tag)
15000 {
15001 default:
15002 continue;
15003
15004 case DT_PPC64_GLINK:
15005 s = htab->glink;
15006 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15007 /* We stupidly defined DT_PPC64_GLINK to be the start
15008 of glink rather than the first entry point, which is
15009 what ld.so needs, and now have a bigger stub to
15010 support automatic multiple TOCs. */
15011 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 8 * 4;
15012 break;
15013
15014 case DT_PPC64_OPD:
15015 s = bfd_get_section_by_name (output_bfd, ".opd");
15016 if (s == NULL)
15017 continue;
15018 dyn.d_un.d_ptr = s->vma;
15019 break;
15020
15021 case DT_PPC64_OPT:
15022 if (htab->do_multi_toc && htab->multi_toc_needed)
15023 dyn.d_un.d_val |= PPC64_OPT_MULTI_TOC;
15024 break;
15025
15026 case DT_PPC64_OPDSZ:
15027 s = bfd_get_section_by_name (output_bfd, ".opd");
15028 if (s == NULL)
15029 continue;
15030 dyn.d_un.d_val = s->size;
15031 break;
15032
15033 case DT_PLTGOT:
15034 s = htab->elf.splt;
15035 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15036 break;
15037
15038 case DT_JMPREL:
15039 s = htab->elf.srelplt;
15040 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15041 break;
15042
15043 case DT_PLTRELSZ:
15044 dyn.d_un.d_val = htab->elf.srelplt->size;
15045 break;
15046
15047 case DT_RELASZ:
15048 /* Don't count procedure linkage table relocs in the
15049 overall reloc count. */
15050 s = htab->elf.srelplt;
15051 if (s == NULL)
15052 continue;
15053 dyn.d_un.d_val -= s->size;
15054 break;
15055
15056 case DT_RELA:
15057 /* We may not be using the standard ELF linker script.
15058 If .rela.plt is the first .rela section, we adjust
15059 DT_RELA to not include it. */
15060 s = htab->elf.srelplt;
15061 if (s == NULL)
15062 continue;
15063 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
15064 continue;
15065 dyn.d_un.d_ptr += s->size;
15066 break;
15067 }
15068
15069 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
15070 }
15071 }
15072
15073 if (htab->elf.sgot != NULL && htab->elf.sgot->size != 0)
15074 {
15075 /* Fill in the first entry in the global offset table.
15076 We use it to hold the link-time TOCbase. */
15077 bfd_put_64 (output_bfd,
15078 elf_gp (output_bfd) + TOC_BASE_OFF,
15079 htab->elf.sgot->contents);
15080
15081 /* Set .got entry size. */
15082 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 8;
15083 }
15084
15085 if (htab->elf.splt != NULL && htab->elf.splt->size != 0)
15086 {
15087 /* Set .plt entry size. */
15088 elf_section_data (htab->elf.splt->output_section)->this_hdr.sh_entsize
15089 = PLT_ENTRY_SIZE (htab);
15090 }
15091
15092 /* brlt is SEC_LINKER_CREATED, so we need to write out relocs for
15093 brlt ourselves if emitrelocations. */
15094 if (htab->brlt != NULL
15095 && htab->brlt->reloc_count != 0
15096 && !_bfd_elf_link_output_relocs (output_bfd,
15097 htab->brlt,
15098 elf_section_data (htab->brlt)->rela.hdr,
15099 elf_section_data (htab->brlt)->relocs,
15100 NULL))
15101 return FALSE;
15102
15103 if (htab->glink != NULL
15104 && htab->glink->reloc_count != 0
15105 && !_bfd_elf_link_output_relocs (output_bfd,
15106 htab->glink,
15107 elf_section_data (htab->glink)->rela.hdr,
15108 elf_section_data (htab->glink)->relocs,
15109 NULL))
15110 return FALSE;
15111
15112 if (htab->glink_eh_frame != NULL
15113 && htab->glink_eh_frame->size != 0)
15114 {
15115 bfd_vma val;
15116 bfd_byte *p;
15117 asection *stub_sec;
15118
15119 p = htab->glink_eh_frame->contents + sizeof (glink_eh_frame_cie);
15120 for (stub_sec = htab->params->stub_bfd->sections;
15121 stub_sec != NULL;
15122 stub_sec = stub_sec->next)
15123 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
15124 {
15125 /* FDE length. */
15126 p += 4;
15127 /* CIE pointer. */
15128 p += 4;
15129 /* Offset to stub section. */
15130 val = (stub_sec->output_section->vma
15131 + stub_sec->output_offset);
15132 val -= (htab->glink_eh_frame->output_section->vma
15133 + htab->glink_eh_frame->output_offset
15134 + (p - htab->glink_eh_frame->contents));
15135 if (val + 0x80000000 > 0xffffffff)
15136 {
15137 info->callbacks->einfo
15138 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
15139 stub_sec->name);
15140 return FALSE;
15141 }
15142 bfd_put_32 (dynobj, val, p);
15143 p += 4;
15144 /* stub section size. */
15145 p += 4;
15146 /* Augmentation. */
15147 p += 1;
15148 /* Pad. */
15149 p += 7;
15150 }
15151 if (htab->glink != NULL && htab->glink->size != 0)
15152 {
15153 /* FDE length. */
15154 p += 4;
15155 /* CIE pointer. */
15156 p += 4;
15157 /* Offset to .glink. */
15158 val = (htab->glink->output_section->vma
15159 + htab->glink->output_offset
15160 + 8);
15161 val -= (htab->glink_eh_frame->output_section->vma
15162 + htab->glink_eh_frame->output_offset
15163 + (p - htab->glink_eh_frame->contents));
15164 if (val + 0x80000000 > 0xffffffff)
15165 {
15166 info->callbacks->einfo
15167 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
15168 htab->glink->name);
15169 return FALSE;
15170 }
15171 bfd_put_32 (dynobj, val, p);
15172 p += 4;
15173 /* .glink size. */
15174 p += 4;
15175 /* Augmentation. */
15176 p += 1;
15177 /* Ops. */
15178 p += 7;
15179 }
15180
15181 if (htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME
15182 && !_bfd_elf_write_section_eh_frame (output_bfd, info,
15183 htab->glink_eh_frame,
15184 htab->glink_eh_frame->contents))
15185 return FALSE;
15186 }
15187
15188 /* We need to handle writing out multiple GOT sections ourselves,
15189 since we didn't add them to DYNOBJ. We know dynobj is the first
15190 bfd. */
15191 while ((dynobj = dynobj->link.next) != NULL)
15192 {
15193 asection *s;
15194
15195 if (!is_ppc64_elf (dynobj))
15196 continue;
15197
15198 s = ppc64_elf_tdata (dynobj)->got;
15199 if (s != NULL
15200 && s->size != 0
15201 && s->output_section != bfd_abs_section_ptr
15202 && !bfd_set_section_contents (output_bfd, s->output_section,
15203 s->contents, s->output_offset,
15204 s->size))
15205 return FALSE;
15206 s = ppc64_elf_tdata (dynobj)->relgot;
15207 if (s != NULL
15208 && s->size != 0
15209 && s->output_section != bfd_abs_section_ptr
15210 && !bfd_set_section_contents (output_bfd, s->output_section,
15211 s->contents, s->output_offset,
15212 s->size))
15213 return FALSE;
15214 }
15215
15216 return TRUE;
15217 }
15218
15219 #include "elf64-target.h"
15220
15221 /* FreeBSD support */
15222
15223 #undef TARGET_LITTLE_SYM
15224 #undef TARGET_LITTLE_NAME
15225
15226 #undef TARGET_BIG_SYM
15227 #define TARGET_BIG_SYM powerpc_elf64_fbsd_vec
15228 #undef TARGET_BIG_NAME
15229 #define TARGET_BIG_NAME "elf64-powerpc-freebsd"
15230
15231 #undef ELF_OSABI
15232 #define ELF_OSABI ELFOSABI_FREEBSD
15233
15234 #undef elf64_bed
15235 #define elf64_bed elf64_powerpc_fbsd_bed
15236
15237 #include "elf64-target.h"
15238
GDB Binutils - Deliverables
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