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-Wimplicit-fallthrough warning fixes
[deliverable/binutils-gdb.git] / bfd / elf64-ppc.c
1 /* PowerPC64-specific support for 64-bit ELF.
2 Copyright (C) 1999-2016 Free Software Foundation, Inc.
3 Written by Linus Nordberg, Swox AB <info@swox.com>,
4 based on elf32-ppc.c by Ian Lance Taylor.
5 Largely rewritten by Alan Modra.
6
7 This file is part of BFD, the Binary File Descriptor library.
8
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
13
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
18
19 You should have received a copy of the GNU General Public License along
20 with this program; if not, write to the Free Software Foundation, Inc.,
21 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
22
23
24 /* The 64-bit PowerPC ELF ABI may be found at
25 http://www.linuxbase.org/spec/ELF/ppc64/PPC-elf64abi.txt, and
26 http://www.linuxbase.org/spec/ELF/ppc64/spec/book1.html */
27
28 #include "sysdep.h"
29 #include <stdarg.h>
30 #include "bfd.h"
31 #include "bfdlink.h"
32 #include "libbfd.h"
33 #include "elf-bfd.h"
34 #include "elf/ppc64.h"
35 #include "elf64-ppc.h"
36 #include "dwarf2.h"
37
38 static bfd_reloc_status_type ppc64_elf_ha_reloc
39 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
40 static bfd_reloc_status_type ppc64_elf_branch_reloc
41 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
42 static bfd_reloc_status_type ppc64_elf_brtaken_reloc
43 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
44 static bfd_reloc_status_type ppc64_elf_sectoff_reloc
45 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
46 static bfd_reloc_status_type ppc64_elf_sectoff_ha_reloc
47 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
48 static bfd_reloc_status_type ppc64_elf_toc_reloc
49 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
50 static bfd_reloc_status_type ppc64_elf_toc_ha_reloc
51 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
52 static bfd_reloc_status_type ppc64_elf_toc64_reloc
53 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
54 static bfd_reloc_status_type ppc64_elf_unhandled_reloc
55 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
56 static bfd_vma opd_entry_value
57 (asection *, bfd_vma, asection **, bfd_vma *, bfd_boolean);
58
59 #define TARGET_LITTLE_SYM powerpc_elf64_le_vec
60 #define TARGET_LITTLE_NAME "elf64-powerpcle"
61 #define TARGET_BIG_SYM powerpc_elf64_vec
62 #define TARGET_BIG_NAME "elf64-powerpc"
63 #define ELF_ARCH bfd_arch_powerpc
64 #define ELF_TARGET_ID PPC64_ELF_DATA
65 #define ELF_MACHINE_CODE EM_PPC64
66 #define ELF_MAXPAGESIZE 0x10000
67 #define ELF_COMMONPAGESIZE 0x10000
68 #define elf_info_to_howto ppc64_elf_info_to_howto
69
70 #define elf_backend_want_got_sym 0
71 #define elf_backend_want_plt_sym 0
72 #define elf_backend_plt_alignment 3
73 #define elf_backend_plt_not_loaded 1
74 #define elf_backend_got_header_size 8
75 #define elf_backend_can_gc_sections 1
76 #define elf_backend_can_refcount 1
77 #define elf_backend_rela_normal 1
78 #define elf_backend_default_execstack 0
79
80 #define bfd_elf64_mkobject ppc64_elf_mkobject
81 #define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup
82 #define bfd_elf64_bfd_reloc_name_lookup ppc64_elf_reloc_name_lookup
83 #define bfd_elf64_bfd_merge_private_bfd_data ppc64_elf_merge_private_bfd_data
84 #define bfd_elf64_bfd_print_private_bfd_data ppc64_elf_print_private_bfd_data
85 #define bfd_elf64_new_section_hook ppc64_elf_new_section_hook
86 #define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create
87 #define bfd_elf64_get_synthetic_symtab ppc64_elf_get_synthetic_symtab
88 #define bfd_elf64_bfd_link_just_syms ppc64_elf_link_just_syms
89
90 #define elf_backend_object_p ppc64_elf_object_p
91 #define elf_backend_grok_prstatus ppc64_elf_grok_prstatus
92 #define elf_backend_grok_psinfo ppc64_elf_grok_psinfo
93 #define elf_backend_write_core_note ppc64_elf_write_core_note
94 #define elf_backend_create_dynamic_sections ppc64_elf_create_dynamic_sections
95 #define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol
96 #define elf_backend_add_symbol_hook ppc64_elf_add_symbol_hook
97 #define elf_backend_check_directives ppc64_elf_before_check_relocs
98 #define elf_backend_notice_as_needed ppc64_elf_notice_as_needed
99 #define elf_backend_archive_symbol_lookup ppc64_elf_archive_symbol_lookup
100 #define elf_backend_check_relocs ppc64_elf_check_relocs
101 #define elf_backend_gc_keep ppc64_elf_gc_keep
102 #define elf_backend_gc_mark_dynamic_ref ppc64_elf_gc_mark_dynamic_ref
103 #define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook
104 #define elf_backend_gc_sweep_hook ppc64_elf_gc_sweep_hook
105 #define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol
106 #define elf_backend_hide_symbol ppc64_elf_hide_symbol
107 #define elf_backend_maybe_function_sym ppc64_elf_maybe_function_sym
108 #define elf_backend_always_size_sections ppc64_elf_func_desc_adjust
109 #define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections
110 #define elf_backend_hash_symbol ppc64_elf_hash_symbol
111 #define elf_backend_init_index_section _bfd_elf_init_2_index_sections
112 #define elf_backend_action_discarded ppc64_elf_action_discarded
113 #define elf_backend_relocate_section ppc64_elf_relocate_section
114 #define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol
115 #define elf_backend_reloc_type_class ppc64_elf_reloc_type_class
116 #define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections
117 #define elf_backend_link_output_symbol_hook ppc64_elf_output_symbol_hook
118 #define elf_backend_special_sections ppc64_elf_special_sections
119 #define elf_backend_merge_symbol_attribute ppc64_elf_merge_symbol_attribute
120
121 /* The name of the dynamic interpreter. This is put in the .interp
122 section. */
123 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
124
125 /* The size in bytes of an entry in the procedure linkage table. */
126 #define PLT_ENTRY_SIZE(htab) (htab->opd_abi ? 24 : 8)
127
128 /* The initial size of the plt reserved for the dynamic linker. */
129 #define PLT_INITIAL_ENTRY_SIZE(htab) (htab->opd_abi ? 24 : 16)
130
131 /* Offsets to some stack save slots. */
132 #define STK_LR 16
133 #define STK_TOC(htab) (htab->opd_abi ? 40 : 24)
134 /* This one is dodgy. ELFv2 does not have a linker word, so use the
135 CR save slot. Used only by optimised __tls_get_addr call stub,
136 relying on __tls_get_addr_opt not saving CR.. */
137 #define STK_LINKER(htab) (htab->opd_abi ? 32 : 8)
138
139 /* TOC base pointers offset from start of TOC. */
140 #define TOC_BASE_OFF 0x8000
141 /* TOC base alignment. */
142 #define TOC_BASE_ALIGN 256
143
144 /* Offset of tp and dtp pointers from start of TLS block. */
145 #define TP_OFFSET 0x7000
146 #define DTP_OFFSET 0x8000
147
148 /* .plt call stub instructions. The normal stub is like this, but
149 sometimes the .plt entry crosses a 64k boundary and we need to
150 insert an addi to adjust r11. */
151 #define STD_R2_0R1 0xf8410000 /* std %r2,0+40(%r1) */
152 #define ADDIS_R11_R2 0x3d620000 /* addis %r11,%r2,xxx@ha */
153 #define LD_R12_0R11 0xe98b0000 /* ld %r12,xxx+0@l(%r11) */
154 #define MTCTR_R12 0x7d8903a6 /* mtctr %r12 */
155 #define LD_R2_0R11 0xe84b0000 /* ld %r2,xxx+8@l(%r11) */
156 #define LD_R11_0R11 0xe96b0000 /* ld %r11,xxx+16@l(%r11) */
157 #define BCTR 0x4e800420 /* bctr */
158
159 #define ADDI_R11_R11 0x396b0000 /* addi %r11,%r11,off@l */
160 #define ADDIS_R2_R2 0x3c420000 /* addis %r2,%r2,off@ha */
161 #define ADDI_R2_R2 0x38420000 /* addi %r2,%r2,off@l */
162
163 #define XOR_R2_R12_R12 0x7d826278 /* xor %r2,%r12,%r12 */
164 #define ADD_R11_R11_R2 0x7d6b1214 /* add %r11,%r11,%r2 */
165 #define XOR_R11_R12_R12 0x7d8b6278 /* xor %r11,%r12,%r12 */
166 #define ADD_R2_R2_R11 0x7c425a14 /* add %r2,%r2,%r11 */
167 #define CMPLDI_R2_0 0x28220000 /* cmpldi %r2,0 */
168 #define BNECTR 0x4ca20420 /* bnectr+ */
169 #define BNECTR_P4 0x4ce20420 /* bnectr+ */
170
171 #define LD_R12_0R2 0xe9820000 /* ld %r12,xxx+0(%r2) */
172 #define LD_R11_0R2 0xe9620000 /* ld %r11,xxx+0(%r2) */
173 #define LD_R2_0R2 0xe8420000 /* ld %r2,xxx+0(%r2) */
174
175 #define LD_R2_0R1 0xe8410000 /* ld %r2,0(%r1) */
176 #define LD_R2_0R12 0xe84c0000 /* ld %r2,0(%r12) */
177 #define ADD_R2_R2_R12 0x7c426214 /* add %r2,%r2,%r12 */
178
179 #define LIS_R2 0x3c400000 /* lis %r2,xxx@ha */
180 #define ADDIS_R2_R12 0x3c4c0000 /* addis %r2,%r12,xxx@ha */
181 #define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */
182 #define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,xxx@ha */
183 #define LD_R12_0R12 0xe98c0000 /* ld %r12,xxx@l(%r12) */
184
185 /* glink call stub instructions. We enter with the index in R0. */
186 #define GLINK_CALL_STUB_SIZE (16*4)
187 /* 0: */
188 /* .quad plt0-1f */
189 /* __glink: */
190 #define MFLR_R12 0x7d8802a6 /* mflr %12 */
191 #define BCL_20_31 0x429f0005 /* bcl 20,31,1f */
192 /* 1: */
193 #define MFLR_R11 0x7d6802a6 /* mflr %11 */
194 /* ld %2,(0b-1b)(%11) */
195 #define MTLR_R12 0x7d8803a6 /* mtlr %12 */
196 #define ADD_R11_R2_R11 0x7d625a14 /* add %11,%2,%11 */
197 /* ld %12,0(%11) */
198 /* ld %2,8(%11) */
199 /* mtctr %12 */
200 /* ld %11,16(%11) */
201 /* bctr */
202 #define MFLR_R0 0x7c0802a6 /* mflr %r0 */
203 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
204 #define SUB_R12_R12_R11 0x7d8b6050 /* subf %r12,%r11,%r12 */
205 #define ADDI_R0_R12 0x380c0000 /* addi %r0,%r12,0 */
206 #define SRDI_R0_R0_2 0x7800f082 /* rldicl %r0,%r0,62,2 */
207
208 /* Pad with this. */
209 #define NOP 0x60000000
210
211 /* Some other nops. */
212 #define CROR_151515 0x4def7b82
213 #define CROR_313131 0x4ffffb82
214
215 /* .glink entries for the first 32k functions are two instructions. */
216 #define LI_R0_0 0x38000000 /* li %r0,0 */
217 #define B_DOT 0x48000000 /* b . */
218
219 /* After that, we need two instructions to load the index, followed by
220 a branch. */
221 #define LIS_R0_0 0x3c000000 /* lis %r0,0 */
222 #define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
223
224 /* Instructions used by the save and restore reg functions. */
225 #define STD_R0_0R1 0xf8010000 /* std %r0,0(%r1) */
226 #define STD_R0_0R12 0xf80c0000 /* std %r0,0(%r12) */
227 #define LD_R0_0R1 0xe8010000 /* ld %r0,0(%r1) */
228 #define LD_R0_0R12 0xe80c0000 /* ld %r0,0(%r12) */
229 #define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
230 #define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
231 #define LI_R12_0 0x39800000 /* li %r12,0 */
232 #define STVX_VR0_R12_R0 0x7c0c01ce /* stvx %v0,%r12,%r0 */
233 #define LVX_VR0_R12_R0 0x7c0c00ce /* lvx %v0,%r12,%r0 */
234 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
235 #define BLR 0x4e800020 /* blr */
236
237 /* Since .opd is an array of descriptors and each entry will end up
238 with identical R_PPC64_RELATIVE relocs, there is really no need to
239 propagate .opd relocs; The dynamic linker should be taught to
240 relocate .opd without reloc entries. */
241 #ifndef NO_OPD_RELOCS
242 #define NO_OPD_RELOCS 0
243 #endif
244
245 #ifndef ARRAY_SIZE
246 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
247 #endif
248
249 static inline int
250 abiversion (bfd *abfd)
251 {
252 return elf_elfheader (abfd)->e_flags & EF_PPC64_ABI;
253 }
254
255 static inline void
256 set_abiversion (bfd *abfd, int ver)
257 {
258 elf_elfheader (abfd)->e_flags &= ~EF_PPC64_ABI;
259 elf_elfheader (abfd)->e_flags |= ver & EF_PPC64_ABI;
260 }
261 \f
262 #define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1)
263
264 /* Relocation HOWTO's. */
265 static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max];
266
267 static reloc_howto_type ppc64_elf_howto_raw[] = {
268 /* This reloc does nothing. */
269 HOWTO (R_PPC64_NONE, /* type */
270 0, /* rightshift */
271 3, /* size (0 = byte, 1 = short, 2 = long) */
272 0, /* bitsize */
273 FALSE, /* pc_relative */
274 0, /* bitpos */
275 complain_overflow_dont, /* complain_on_overflow */
276 bfd_elf_generic_reloc, /* special_function */
277 "R_PPC64_NONE", /* name */
278 FALSE, /* partial_inplace */
279 0, /* src_mask */
280 0, /* dst_mask */
281 FALSE), /* pcrel_offset */
282
283 /* A standard 32 bit relocation. */
284 HOWTO (R_PPC64_ADDR32, /* type */
285 0, /* rightshift */
286 2, /* size (0 = byte, 1 = short, 2 = long) */
287 32, /* bitsize */
288 FALSE, /* pc_relative */
289 0, /* bitpos */
290 complain_overflow_bitfield, /* complain_on_overflow */
291 bfd_elf_generic_reloc, /* special_function */
292 "R_PPC64_ADDR32", /* name */
293 FALSE, /* partial_inplace */
294 0, /* src_mask */
295 0xffffffff, /* dst_mask */
296 FALSE), /* pcrel_offset */
297
298 /* An absolute 26 bit branch; the lower two bits must be zero.
299 FIXME: we don't check that, we just clear them. */
300 HOWTO (R_PPC64_ADDR24, /* type */
301 0, /* rightshift */
302 2, /* size (0 = byte, 1 = short, 2 = long) */
303 26, /* bitsize */
304 FALSE, /* pc_relative */
305 0, /* bitpos */
306 complain_overflow_bitfield, /* complain_on_overflow */
307 bfd_elf_generic_reloc, /* special_function */
308 "R_PPC64_ADDR24", /* name */
309 FALSE, /* partial_inplace */
310 0, /* src_mask */
311 0x03fffffc, /* dst_mask */
312 FALSE), /* pcrel_offset */
313
314 /* A standard 16 bit relocation. */
315 HOWTO (R_PPC64_ADDR16, /* type */
316 0, /* rightshift */
317 1, /* size (0 = byte, 1 = short, 2 = long) */
318 16, /* bitsize */
319 FALSE, /* pc_relative */
320 0, /* bitpos */
321 complain_overflow_bitfield, /* complain_on_overflow */
322 bfd_elf_generic_reloc, /* special_function */
323 "R_PPC64_ADDR16", /* name */
324 FALSE, /* partial_inplace */
325 0, /* src_mask */
326 0xffff, /* dst_mask */
327 FALSE), /* pcrel_offset */
328
329 /* A 16 bit relocation without overflow. */
330 HOWTO (R_PPC64_ADDR16_LO, /* type */
331 0, /* rightshift */
332 1, /* size (0 = byte, 1 = short, 2 = long) */
333 16, /* bitsize */
334 FALSE, /* pc_relative */
335 0, /* bitpos */
336 complain_overflow_dont,/* complain_on_overflow */
337 bfd_elf_generic_reloc, /* special_function */
338 "R_PPC64_ADDR16_LO", /* name */
339 FALSE, /* partial_inplace */
340 0, /* src_mask */
341 0xffff, /* dst_mask */
342 FALSE), /* pcrel_offset */
343
344 /* Bits 16-31 of an address. */
345 HOWTO (R_PPC64_ADDR16_HI, /* type */
346 16, /* rightshift */
347 1, /* size (0 = byte, 1 = short, 2 = long) */
348 16, /* bitsize */
349 FALSE, /* pc_relative */
350 0, /* bitpos */
351 complain_overflow_signed, /* complain_on_overflow */
352 bfd_elf_generic_reloc, /* special_function */
353 "R_PPC64_ADDR16_HI", /* name */
354 FALSE, /* partial_inplace */
355 0, /* src_mask */
356 0xffff, /* dst_mask */
357 FALSE), /* pcrel_offset */
358
359 /* Bits 16-31 of an address, plus 1 if the contents of the low 16
360 bits, treated as a signed number, is negative. */
361 HOWTO (R_PPC64_ADDR16_HA, /* type */
362 16, /* rightshift */
363 1, /* size (0 = byte, 1 = short, 2 = long) */
364 16, /* bitsize */
365 FALSE, /* pc_relative */
366 0, /* bitpos */
367 complain_overflow_signed, /* complain_on_overflow */
368 ppc64_elf_ha_reloc, /* special_function */
369 "R_PPC64_ADDR16_HA", /* name */
370 FALSE, /* partial_inplace */
371 0, /* src_mask */
372 0xffff, /* dst_mask */
373 FALSE), /* pcrel_offset */
374
375 /* An absolute 16 bit branch; the lower two bits must be zero.
376 FIXME: we don't check that, we just clear them. */
377 HOWTO (R_PPC64_ADDR14, /* type */
378 0, /* rightshift */
379 2, /* size (0 = byte, 1 = short, 2 = long) */
380 16, /* bitsize */
381 FALSE, /* pc_relative */
382 0, /* bitpos */
383 complain_overflow_signed, /* complain_on_overflow */
384 ppc64_elf_branch_reloc, /* special_function */
385 "R_PPC64_ADDR14", /* name */
386 FALSE, /* partial_inplace */
387 0, /* src_mask */
388 0x0000fffc, /* dst_mask */
389 FALSE), /* pcrel_offset */
390
391 /* An absolute 16 bit branch, for which bit 10 should be set to
392 indicate that the branch is expected to be taken. The lower two
393 bits must be zero. */
394 HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */
395 0, /* rightshift */
396 2, /* size (0 = byte, 1 = short, 2 = long) */
397 16, /* bitsize */
398 FALSE, /* pc_relative */
399 0, /* bitpos */
400 complain_overflow_signed, /* complain_on_overflow */
401 ppc64_elf_brtaken_reloc, /* special_function */
402 "R_PPC64_ADDR14_BRTAKEN",/* name */
403 FALSE, /* partial_inplace */
404 0, /* src_mask */
405 0x0000fffc, /* dst_mask */
406 FALSE), /* pcrel_offset */
407
408 /* An absolute 16 bit branch, for which bit 10 should be set to
409 indicate that the branch is not expected to be taken. The lower
410 two bits must be zero. */
411 HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */
412 0, /* rightshift */
413 2, /* size (0 = byte, 1 = short, 2 = long) */
414 16, /* bitsize */
415 FALSE, /* pc_relative */
416 0, /* bitpos */
417 complain_overflow_signed, /* complain_on_overflow */
418 ppc64_elf_brtaken_reloc, /* special_function */
419 "R_PPC64_ADDR14_BRNTAKEN",/* name */
420 FALSE, /* partial_inplace */
421 0, /* src_mask */
422 0x0000fffc, /* dst_mask */
423 FALSE), /* pcrel_offset */
424
425 /* A relative 26 bit branch; the lower two bits must be zero. */
426 HOWTO (R_PPC64_REL24, /* type */
427 0, /* rightshift */
428 2, /* size (0 = byte, 1 = short, 2 = long) */
429 26, /* bitsize */
430 TRUE, /* pc_relative */
431 0, /* bitpos */
432 complain_overflow_signed, /* complain_on_overflow */
433 ppc64_elf_branch_reloc, /* special_function */
434 "R_PPC64_REL24", /* name */
435 FALSE, /* partial_inplace */
436 0, /* src_mask */
437 0x03fffffc, /* dst_mask */
438 TRUE), /* pcrel_offset */
439
440 /* A relative 16 bit branch; the lower two bits must be zero. */
441 HOWTO (R_PPC64_REL14, /* type */
442 0, /* rightshift */
443 2, /* size (0 = byte, 1 = short, 2 = long) */
444 16, /* bitsize */
445 TRUE, /* pc_relative */
446 0, /* bitpos */
447 complain_overflow_signed, /* complain_on_overflow */
448 ppc64_elf_branch_reloc, /* special_function */
449 "R_PPC64_REL14", /* name */
450 FALSE, /* partial_inplace */
451 0, /* src_mask */
452 0x0000fffc, /* dst_mask */
453 TRUE), /* pcrel_offset */
454
455 /* A relative 16 bit branch. Bit 10 should be set to indicate that
456 the branch is expected to be taken. The lower two bits must be
457 zero. */
458 HOWTO (R_PPC64_REL14_BRTAKEN, /* type */
459 0, /* rightshift */
460 2, /* size (0 = byte, 1 = short, 2 = long) */
461 16, /* bitsize */
462 TRUE, /* pc_relative */
463 0, /* bitpos */
464 complain_overflow_signed, /* complain_on_overflow */
465 ppc64_elf_brtaken_reloc, /* special_function */
466 "R_PPC64_REL14_BRTAKEN", /* name */
467 FALSE, /* partial_inplace */
468 0, /* src_mask */
469 0x0000fffc, /* dst_mask */
470 TRUE), /* pcrel_offset */
471
472 /* A relative 16 bit branch. Bit 10 should be set to indicate that
473 the branch is not expected to be taken. The lower two bits must
474 be zero. */
475 HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */
476 0, /* rightshift */
477 2, /* size (0 = byte, 1 = short, 2 = long) */
478 16, /* bitsize */
479 TRUE, /* pc_relative */
480 0, /* bitpos */
481 complain_overflow_signed, /* complain_on_overflow */
482 ppc64_elf_brtaken_reloc, /* special_function */
483 "R_PPC64_REL14_BRNTAKEN",/* name */
484 FALSE, /* partial_inplace */
485 0, /* src_mask */
486 0x0000fffc, /* dst_mask */
487 TRUE), /* pcrel_offset */
488
489 /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
490 symbol. */
491 HOWTO (R_PPC64_GOT16, /* type */
492 0, /* rightshift */
493 1, /* size (0 = byte, 1 = short, 2 = long) */
494 16, /* bitsize */
495 FALSE, /* pc_relative */
496 0, /* bitpos */
497 complain_overflow_signed, /* complain_on_overflow */
498 ppc64_elf_unhandled_reloc, /* special_function */
499 "R_PPC64_GOT16", /* name */
500 FALSE, /* partial_inplace */
501 0, /* src_mask */
502 0xffff, /* dst_mask */
503 FALSE), /* pcrel_offset */
504
505 /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
506 the symbol. */
507 HOWTO (R_PPC64_GOT16_LO, /* type */
508 0, /* rightshift */
509 1, /* size (0 = byte, 1 = short, 2 = long) */
510 16, /* bitsize */
511 FALSE, /* pc_relative */
512 0, /* bitpos */
513 complain_overflow_dont, /* complain_on_overflow */
514 ppc64_elf_unhandled_reloc, /* special_function */
515 "R_PPC64_GOT16_LO", /* name */
516 FALSE, /* partial_inplace */
517 0, /* src_mask */
518 0xffff, /* dst_mask */
519 FALSE), /* pcrel_offset */
520
521 /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
522 the symbol. */
523 HOWTO (R_PPC64_GOT16_HI, /* type */
524 16, /* rightshift */
525 1, /* size (0 = byte, 1 = short, 2 = long) */
526 16, /* bitsize */
527 FALSE, /* pc_relative */
528 0, /* bitpos */
529 complain_overflow_signed,/* complain_on_overflow */
530 ppc64_elf_unhandled_reloc, /* special_function */
531 "R_PPC64_GOT16_HI", /* name */
532 FALSE, /* partial_inplace */
533 0, /* src_mask */
534 0xffff, /* dst_mask */
535 FALSE), /* pcrel_offset */
536
537 /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
538 the symbol. */
539 HOWTO (R_PPC64_GOT16_HA, /* type */
540 16, /* rightshift */
541 1, /* size (0 = byte, 1 = short, 2 = long) */
542 16, /* bitsize */
543 FALSE, /* pc_relative */
544 0, /* bitpos */
545 complain_overflow_signed,/* complain_on_overflow */
546 ppc64_elf_unhandled_reloc, /* special_function */
547 "R_PPC64_GOT16_HA", /* name */
548 FALSE, /* partial_inplace */
549 0, /* src_mask */
550 0xffff, /* dst_mask */
551 FALSE), /* pcrel_offset */
552
553 /* This is used only by the dynamic linker. The symbol should exist
554 both in the object being run and in some shared library. The
555 dynamic linker copies the data addressed by the symbol from the
556 shared library into the object, because the object being
557 run has to have the data at some particular address. */
558 HOWTO (R_PPC64_COPY, /* type */
559 0, /* rightshift */
560 0, /* this one is variable size */
561 0, /* bitsize */
562 FALSE, /* pc_relative */
563 0, /* bitpos */
564 complain_overflow_dont, /* complain_on_overflow */
565 ppc64_elf_unhandled_reloc, /* special_function */
566 "R_PPC64_COPY", /* name */
567 FALSE, /* partial_inplace */
568 0, /* src_mask */
569 0, /* dst_mask */
570 FALSE), /* pcrel_offset */
571
572 /* Like R_PPC64_ADDR64, but used when setting global offset table
573 entries. */
574 HOWTO (R_PPC64_GLOB_DAT, /* type */
575 0, /* rightshift */
576 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
577 64, /* bitsize */
578 FALSE, /* pc_relative */
579 0, /* bitpos */
580 complain_overflow_dont, /* complain_on_overflow */
581 ppc64_elf_unhandled_reloc, /* special_function */
582 "R_PPC64_GLOB_DAT", /* name */
583 FALSE, /* partial_inplace */
584 0, /* src_mask */
585 ONES (64), /* dst_mask */
586 FALSE), /* pcrel_offset */
587
588 /* Created by the link editor. Marks a procedure linkage table
589 entry for a symbol. */
590 HOWTO (R_PPC64_JMP_SLOT, /* type */
591 0, /* rightshift */
592 0, /* size (0 = byte, 1 = short, 2 = long) */
593 0, /* bitsize */
594 FALSE, /* pc_relative */
595 0, /* bitpos */
596 complain_overflow_dont, /* complain_on_overflow */
597 ppc64_elf_unhandled_reloc, /* special_function */
598 "R_PPC64_JMP_SLOT", /* name */
599 FALSE, /* partial_inplace */
600 0, /* src_mask */
601 0, /* dst_mask */
602 FALSE), /* pcrel_offset */
603
604 /* Used only by the dynamic linker. When the object is run, this
605 doubleword64 is set to the load address of the object, plus the
606 addend. */
607 HOWTO (R_PPC64_RELATIVE, /* type */
608 0, /* rightshift */
609 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
610 64, /* bitsize */
611 FALSE, /* pc_relative */
612 0, /* bitpos */
613 complain_overflow_dont, /* complain_on_overflow */
614 bfd_elf_generic_reloc, /* special_function */
615 "R_PPC64_RELATIVE", /* name */
616 FALSE, /* partial_inplace */
617 0, /* src_mask */
618 ONES (64), /* dst_mask */
619 FALSE), /* pcrel_offset */
620
621 /* Like R_PPC64_ADDR32, but may be unaligned. */
622 HOWTO (R_PPC64_UADDR32, /* type */
623 0, /* rightshift */
624 2, /* size (0 = byte, 1 = short, 2 = long) */
625 32, /* bitsize */
626 FALSE, /* pc_relative */
627 0, /* bitpos */
628 complain_overflow_bitfield, /* complain_on_overflow */
629 bfd_elf_generic_reloc, /* special_function */
630 "R_PPC64_UADDR32", /* name */
631 FALSE, /* partial_inplace */
632 0, /* src_mask */
633 0xffffffff, /* dst_mask */
634 FALSE), /* pcrel_offset */
635
636 /* Like R_PPC64_ADDR16, but may be unaligned. */
637 HOWTO (R_PPC64_UADDR16, /* type */
638 0, /* rightshift */
639 1, /* size (0 = byte, 1 = short, 2 = long) */
640 16, /* bitsize */
641 FALSE, /* pc_relative */
642 0, /* bitpos */
643 complain_overflow_bitfield, /* complain_on_overflow */
644 bfd_elf_generic_reloc, /* special_function */
645 "R_PPC64_UADDR16", /* name */
646 FALSE, /* partial_inplace */
647 0, /* src_mask */
648 0xffff, /* dst_mask */
649 FALSE), /* pcrel_offset */
650
651 /* 32-bit PC relative. */
652 HOWTO (R_PPC64_REL32, /* type */
653 0, /* rightshift */
654 2, /* size (0 = byte, 1 = short, 2 = long) */
655 32, /* bitsize */
656 TRUE, /* pc_relative */
657 0, /* bitpos */
658 complain_overflow_signed, /* complain_on_overflow */
659 bfd_elf_generic_reloc, /* special_function */
660 "R_PPC64_REL32", /* name */
661 FALSE, /* partial_inplace */
662 0, /* src_mask */
663 0xffffffff, /* dst_mask */
664 TRUE), /* pcrel_offset */
665
666 /* 32-bit relocation to the symbol's procedure linkage table. */
667 HOWTO (R_PPC64_PLT32, /* type */
668 0, /* rightshift */
669 2, /* size (0 = byte, 1 = short, 2 = long) */
670 32, /* bitsize */
671 FALSE, /* pc_relative */
672 0, /* bitpos */
673 complain_overflow_bitfield, /* complain_on_overflow */
674 ppc64_elf_unhandled_reloc, /* special_function */
675 "R_PPC64_PLT32", /* name */
676 FALSE, /* partial_inplace */
677 0, /* src_mask */
678 0xffffffff, /* dst_mask */
679 FALSE), /* pcrel_offset */
680
681 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
682 FIXME: R_PPC64_PLTREL32 not supported. */
683 HOWTO (R_PPC64_PLTREL32, /* type */
684 0, /* rightshift */
685 2, /* size (0 = byte, 1 = short, 2 = long) */
686 32, /* bitsize */
687 TRUE, /* pc_relative */
688 0, /* bitpos */
689 complain_overflow_signed, /* complain_on_overflow */
690 ppc64_elf_unhandled_reloc, /* special_function */
691 "R_PPC64_PLTREL32", /* name */
692 FALSE, /* partial_inplace */
693 0, /* src_mask */
694 0xffffffff, /* dst_mask */
695 TRUE), /* pcrel_offset */
696
697 /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
698 the symbol. */
699 HOWTO (R_PPC64_PLT16_LO, /* type */
700 0, /* rightshift */
701 1, /* size (0 = byte, 1 = short, 2 = long) */
702 16, /* bitsize */
703 FALSE, /* pc_relative */
704 0, /* bitpos */
705 complain_overflow_dont, /* complain_on_overflow */
706 ppc64_elf_unhandled_reloc, /* special_function */
707 "R_PPC64_PLT16_LO", /* name */
708 FALSE, /* partial_inplace */
709 0, /* src_mask */
710 0xffff, /* dst_mask */
711 FALSE), /* pcrel_offset */
712
713 /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
714 the symbol. */
715 HOWTO (R_PPC64_PLT16_HI, /* type */
716 16, /* rightshift */
717 1, /* size (0 = byte, 1 = short, 2 = long) */
718 16, /* bitsize */
719 FALSE, /* pc_relative */
720 0, /* bitpos */
721 complain_overflow_signed, /* complain_on_overflow */
722 ppc64_elf_unhandled_reloc, /* special_function */
723 "R_PPC64_PLT16_HI", /* name */
724 FALSE, /* partial_inplace */
725 0, /* src_mask */
726 0xffff, /* dst_mask */
727 FALSE), /* pcrel_offset */
728
729 /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
730 the symbol. */
731 HOWTO (R_PPC64_PLT16_HA, /* type */
732 16, /* rightshift */
733 1, /* size (0 = byte, 1 = short, 2 = long) */
734 16, /* bitsize */
735 FALSE, /* pc_relative */
736 0, /* bitpos */
737 complain_overflow_signed, /* complain_on_overflow */
738 ppc64_elf_unhandled_reloc, /* special_function */
739 "R_PPC64_PLT16_HA", /* name */
740 FALSE, /* partial_inplace */
741 0, /* src_mask */
742 0xffff, /* dst_mask */
743 FALSE), /* pcrel_offset */
744
745 /* 16-bit section relative relocation. */
746 HOWTO (R_PPC64_SECTOFF, /* type */
747 0, /* rightshift */
748 1, /* size (0 = byte, 1 = short, 2 = long) */
749 16, /* bitsize */
750 FALSE, /* pc_relative */
751 0, /* bitpos */
752 complain_overflow_signed, /* complain_on_overflow */
753 ppc64_elf_sectoff_reloc, /* special_function */
754 "R_PPC64_SECTOFF", /* name */
755 FALSE, /* partial_inplace */
756 0, /* src_mask */
757 0xffff, /* dst_mask */
758 FALSE), /* pcrel_offset */
759
760 /* Like R_PPC64_SECTOFF, but no overflow warning. */
761 HOWTO (R_PPC64_SECTOFF_LO, /* type */
762 0, /* rightshift */
763 1, /* size (0 = byte, 1 = short, 2 = long) */
764 16, /* bitsize */
765 FALSE, /* pc_relative */
766 0, /* bitpos */
767 complain_overflow_dont, /* complain_on_overflow */
768 ppc64_elf_sectoff_reloc, /* special_function */
769 "R_PPC64_SECTOFF_LO", /* name */
770 FALSE, /* partial_inplace */
771 0, /* src_mask */
772 0xffff, /* dst_mask */
773 FALSE), /* pcrel_offset */
774
775 /* 16-bit upper half section relative relocation. */
776 HOWTO (R_PPC64_SECTOFF_HI, /* type */
777 16, /* rightshift */
778 1, /* size (0 = byte, 1 = short, 2 = long) */
779 16, /* bitsize */
780 FALSE, /* pc_relative */
781 0, /* bitpos */
782 complain_overflow_signed, /* complain_on_overflow */
783 ppc64_elf_sectoff_reloc, /* special_function */
784 "R_PPC64_SECTOFF_HI", /* name */
785 FALSE, /* partial_inplace */
786 0, /* src_mask */
787 0xffff, /* dst_mask */
788 FALSE), /* pcrel_offset */
789
790 /* 16-bit upper half adjusted section relative relocation. */
791 HOWTO (R_PPC64_SECTOFF_HA, /* type */
792 16, /* rightshift */
793 1, /* size (0 = byte, 1 = short, 2 = long) */
794 16, /* bitsize */
795 FALSE, /* pc_relative */
796 0, /* bitpos */
797 complain_overflow_signed, /* complain_on_overflow */
798 ppc64_elf_sectoff_ha_reloc, /* special_function */
799 "R_PPC64_SECTOFF_HA", /* name */
800 FALSE, /* partial_inplace */
801 0, /* src_mask */
802 0xffff, /* dst_mask */
803 FALSE), /* pcrel_offset */
804
805 /* Like R_PPC64_REL24 without touching the two least significant bits. */
806 HOWTO (R_PPC64_REL30, /* type */
807 2, /* rightshift */
808 2, /* size (0 = byte, 1 = short, 2 = long) */
809 30, /* bitsize */
810 TRUE, /* pc_relative */
811 0, /* bitpos */
812 complain_overflow_dont, /* complain_on_overflow */
813 bfd_elf_generic_reloc, /* special_function */
814 "R_PPC64_REL30", /* name */
815 FALSE, /* partial_inplace */
816 0, /* src_mask */
817 0xfffffffc, /* dst_mask */
818 TRUE), /* pcrel_offset */
819
820 /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
821
822 /* A standard 64-bit relocation. */
823 HOWTO (R_PPC64_ADDR64, /* type */
824 0, /* rightshift */
825 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
826 64, /* bitsize */
827 FALSE, /* pc_relative */
828 0, /* bitpos */
829 complain_overflow_dont, /* complain_on_overflow */
830 bfd_elf_generic_reloc, /* special_function */
831 "R_PPC64_ADDR64", /* name */
832 FALSE, /* partial_inplace */
833 0, /* src_mask */
834 ONES (64), /* dst_mask */
835 FALSE), /* pcrel_offset */
836
837 /* The bits 32-47 of an address. */
838 HOWTO (R_PPC64_ADDR16_HIGHER, /* type */
839 32, /* rightshift */
840 1, /* size (0 = byte, 1 = short, 2 = long) */
841 16, /* bitsize */
842 FALSE, /* pc_relative */
843 0, /* bitpos */
844 complain_overflow_dont, /* complain_on_overflow */
845 bfd_elf_generic_reloc, /* special_function */
846 "R_PPC64_ADDR16_HIGHER", /* name */
847 FALSE, /* partial_inplace */
848 0, /* src_mask */
849 0xffff, /* dst_mask */
850 FALSE), /* pcrel_offset */
851
852 /* The bits 32-47 of an address, plus 1 if the contents of the low
853 16 bits, treated as a signed number, is negative. */
854 HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */
855 32, /* rightshift */
856 1, /* size (0 = byte, 1 = short, 2 = long) */
857 16, /* bitsize */
858 FALSE, /* pc_relative */
859 0, /* bitpos */
860 complain_overflow_dont, /* complain_on_overflow */
861 ppc64_elf_ha_reloc, /* special_function */
862 "R_PPC64_ADDR16_HIGHERA", /* name */
863 FALSE, /* partial_inplace */
864 0, /* src_mask */
865 0xffff, /* dst_mask */
866 FALSE), /* pcrel_offset */
867
868 /* The bits 48-63 of an address. */
869 HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */
870 48, /* rightshift */
871 1, /* size (0 = byte, 1 = short, 2 = long) */
872 16, /* bitsize */
873 FALSE, /* pc_relative */
874 0, /* bitpos */
875 complain_overflow_dont, /* complain_on_overflow */
876 bfd_elf_generic_reloc, /* special_function */
877 "R_PPC64_ADDR16_HIGHEST", /* name */
878 FALSE, /* partial_inplace */
879 0, /* src_mask */
880 0xffff, /* dst_mask */
881 FALSE), /* pcrel_offset */
882
883 /* The bits 48-63 of an address, plus 1 if the contents of the low
884 16 bits, treated as a signed number, is negative. */
885 HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */
886 48, /* rightshift */
887 1, /* size (0 = byte, 1 = short, 2 = long) */
888 16, /* bitsize */
889 FALSE, /* pc_relative */
890 0, /* bitpos */
891 complain_overflow_dont, /* complain_on_overflow */
892 ppc64_elf_ha_reloc, /* special_function */
893 "R_PPC64_ADDR16_HIGHESTA", /* name */
894 FALSE, /* partial_inplace */
895 0, /* src_mask */
896 0xffff, /* dst_mask */
897 FALSE), /* pcrel_offset */
898
899 /* Like ADDR64, but may be unaligned. */
900 HOWTO (R_PPC64_UADDR64, /* type */
901 0, /* rightshift */
902 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
903 64, /* bitsize */
904 FALSE, /* pc_relative */
905 0, /* bitpos */
906 complain_overflow_dont, /* complain_on_overflow */
907 bfd_elf_generic_reloc, /* special_function */
908 "R_PPC64_UADDR64", /* name */
909 FALSE, /* partial_inplace */
910 0, /* src_mask */
911 ONES (64), /* dst_mask */
912 FALSE), /* pcrel_offset */
913
914 /* 64-bit relative relocation. */
915 HOWTO (R_PPC64_REL64, /* type */
916 0, /* rightshift */
917 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
918 64, /* bitsize */
919 TRUE, /* pc_relative */
920 0, /* bitpos */
921 complain_overflow_dont, /* complain_on_overflow */
922 bfd_elf_generic_reloc, /* special_function */
923 "R_PPC64_REL64", /* name */
924 FALSE, /* partial_inplace */
925 0, /* src_mask */
926 ONES (64), /* dst_mask */
927 TRUE), /* pcrel_offset */
928
929 /* 64-bit relocation to the symbol's procedure linkage table. */
930 HOWTO (R_PPC64_PLT64, /* type */
931 0, /* rightshift */
932 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
933 64, /* bitsize */
934 FALSE, /* pc_relative */
935 0, /* bitpos */
936 complain_overflow_dont, /* complain_on_overflow */
937 ppc64_elf_unhandled_reloc, /* special_function */
938 "R_PPC64_PLT64", /* name */
939 FALSE, /* partial_inplace */
940 0, /* src_mask */
941 ONES (64), /* dst_mask */
942 FALSE), /* pcrel_offset */
943
944 /* 64-bit PC relative relocation to the symbol's procedure linkage
945 table. */
946 /* FIXME: R_PPC64_PLTREL64 not supported. */
947 HOWTO (R_PPC64_PLTREL64, /* type */
948 0, /* rightshift */
949 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
950 64, /* bitsize */
951 TRUE, /* pc_relative */
952 0, /* bitpos */
953 complain_overflow_dont, /* complain_on_overflow */
954 ppc64_elf_unhandled_reloc, /* special_function */
955 "R_PPC64_PLTREL64", /* name */
956 FALSE, /* partial_inplace */
957 0, /* src_mask */
958 ONES (64), /* dst_mask */
959 TRUE), /* pcrel_offset */
960
961 /* 16 bit TOC-relative relocation. */
962
963 /* R_PPC64_TOC16 47 half16* S + A - .TOC. */
964 HOWTO (R_PPC64_TOC16, /* type */
965 0, /* rightshift */
966 1, /* size (0 = byte, 1 = short, 2 = long) */
967 16, /* bitsize */
968 FALSE, /* pc_relative */
969 0, /* bitpos */
970 complain_overflow_signed, /* complain_on_overflow */
971 ppc64_elf_toc_reloc, /* special_function */
972 "R_PPC64_TOC16", /* name */
973 FALSE, /* partial_inplace */
974 0, /* src_mask */
975 0xffff, /* dst_mask */
976 FALSE), /* pcrel_offset */
977
978 /* 16 bit TOC-relative relocation without overflow. */
979
980 /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
981 HOWTO (R_PPC64_TOC16_LO, /* type */
982 0, /* rightshift */
983 1, /* size (0 = byte, 1 = short, 2 = long) */
984 16, /* bitsize */
985 FALSE, /* pc_relative */
986 0, /* bitpos */
987 complain_overflow_dont, /* complain_on_overflow */
988 ppc64_elf_toc_reloc, /* special_function */
989 "R_PPC64_TOC16_LO", /* name */
990 FALSE, /* partial_inplace */
991 0, /* src_mask */
992 0xffff, /* dst_mask */
993 FALSE), /* pcrel_offset */
994
995 /* 16 bit TOC-relative relocation, high 16 bits. */
996
997 /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
998 HOWTO (R_PPC64_TOC16_HI, /* type */
999 16, /* rightshift */
1000 1, /* size (0 = byte, 1 = short, 2 = long) */
1001 16, /* bitsize */
1002 FALSE, /* pc_relative */
1003 0, /* bitpos */
1004 complain_overflow_signed, /* complain_on_overflow */
1005 ppc64_elf_toc_reloc, /* special_function */
1006 "R_PPC64_TOC16_HI", /* name */
1007 FALSE, /* partial_inplace */
1008 0, /* src_mask */
1009 0xffff, /* dst_mask */
1010 FALSE), /* pcrel_offset */
1011
1012 /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the
1013 contents of the low 16 bits, treated as a signed number, is
1014 negative. */
1015
1016 /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
1017 HOWTO (R_PPC64_TOC16_HA, /* type */
1018 16, /* rightshift */
1019 1, /* size (0 = byte, 1 = short, 2 = long) */
1020 16, /* bitsize */
1021 FALSE, /* pc_relative */
1022 0, /* bitpos */
1023 complain_overflow_signed, /* complain_on_overflow */
1024 ppc64_elf_toc_ha_reloc, /* special_function */
1025 "R_PPC64_TOC16_HA", /* name */
1026 FALSE, /* partial_inplace */
1027 0, /* src_mask */
1028 0xffff, /* dst_mask */
1029 FALSE), /* pcrel_offset */
1030
1031 /* 64-bit relocation; insert value of TOC base (.TOC.). */
1032
1033 /* R_PPC64_TOC 51 doubleword64 .TOC. */
1034 HOWTO (R_PPC64_TOC, /* type */
1035 0, /* rightshift */
1036 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1037 64, /* bitsize */
1038 FALSE, /* pc_relative */
1039 0, /* bitpos */
1040 complain_overflow_dont, /* complain_on_overflow */
1041 ppc64_elf_toc64_reloc, /* special_function */
1042 "R_PPC64_TOC", /* name */
1043 FALSE, /* partial_inplace */
1044 0, /* src_mask */
1045 ONES (64), /* dst_mask */
1046 FALSE), /* pcrel_offset */
1047
1048 /* Like R_PPC64_GOT16, but also informs the link editor that the
1049 value to relocate may (!) refer to a PLT entry which the link
1050 editor (a) may replace with the symbol value. If the link editor
1051 is unable to fully resolve the symbol, it may (b) create a PLT
1052 entry and store the address to the new PLT entry in the GOT.
1053 This permits lazy resolution of function symbols at run time.
1054 The link editor may also skip all of this and just (c) emit a
1055 R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
1056 /* FIXME: R_PPC64_PLTGOT16 not implemented. */
1057 HOWTO (R_PPC64_PLTGOT16, /* type */
1058 0, /* rightshift */
1059 1, /* size (0 = byte, 1 = short, 2 = long) */
1060 16, /* bitsize */
1061 FALSE, /* pc_relative */
1062 0, /* bitpos */
1063 complain_overflow_signed, /* complain_on_overflow */
1064 ppc64_elf_unhandled_reloc, /* special_function */
1065 "R_PPC64_PLTGOT16", /* name */
1066 FALSE, /* partial_inplace */
1067 0, /* src_mask */
1068 0xffff, /* dst_mask */
1069 FALSE), /* pcrel_offset */
1070
1071 /* Like R_PPC64_PLTGOT16, but without overflow. */
1072 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1073 HOWTO (R_PPC64_PLTGOT16_LO, /* type */
1074 0, /* rightshift */
1075 1, /* size (0 = byte, 1 = short, 2 = long) */
1076 16, /* bitsize */
1077 FALSE, /* pc_relative */
1078 0, /* bitpos */
1079 complain_overflow_dont, /* complain_on_overflow */
1080 ppc64_elf_unhandled_reloc, /* special_function */
1081 "R_PPC64_PLTGOT16_LO", /* name */
1082 FALSE, /* partial_inplace */
1083 0, /* src_mask */
1084 0xffff, /* dst_mask */
1085 FALSE), /* pcrel_offset */
1086
1087 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */
1088 /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */
1089 HOWTO (R_PPC64_PLTGOT16_HI, /* type */
1090 16, /* rightshift */
1091 1, /* size (0 = byte, 1 = short, 2 = long) */
1092 16, /* bitsize */
1093 FALSE, /* pc_relative */
1094 0, /* bitpos */
1095 complain_overflow_signed, /* complain_on_overflow */
1096 ppc64_elf_unhandled_reloc, /* special_function */
1097 "R_PPC64_PLTGOT16_HI", /* name */
1098 FALSE, /* partial_inplace */
1099 0, /* src_mask */
1100 0xffff, /* dst_mask */
1101 FALSE), /* pcrel_offset */
1102
1103 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus
1104 1 if the contents of the low 16 bits, treated as a signed number,
1105 is negative. */
1106 /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */
1107 HOWTO (R_PPC64_PLTGOT16_HA, /* type */
1108 16, /* rightshift */
1109 1, /* size (0 = byte, 1 = short, 2 = long) */
1110 16, /* bitsize */
1111 FALSE, /* pc_relative */
1112 0, /* bitpos */
1113 complain_overflow_signed, /* complain_on_overflow */
1114 ppc64_elf_unhandled_reloc, /* special_function */
1115 "R_PPC64_PLTGOT16_HA", /* name */
1116 FALSE, /* partial_inplace */
1117 0, /* src_mask */
1118 0xffff, /* dst_mask */
1119 FALSE), /* pcrel_offset */
1120
1121 /* Like R_PPC64_ADDR16, but for instructions with a DS field. */
1122 HOWTO (R_PPC64_ADDR16_DS, /* type */
1123 0, /* rightshift */
1124 1, /* size (0 = byte, 1 = short, 2 = long) */
1125 16, /* bitsize */
1126 FALSE, /* pc_relative */
1127 0, /* bitpos */
1128 complain_overflow_signed, /* complain_on_overflow */
1129 bfd_elf_generic_reloc, /* special_function */
1130 "R_PPC64_ADDR16_DS", /* name */
1131 FALSE, /* partial_inplace */
1132 0, /* src_mask */
1133 0xfffc, /* dst_mask */
1134 FALSE), /* pcrel_offset */
1135
1136 /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
1137 HOWTO (R_PPC64_ADDR16_LO_DS, /* type */
1138 0, /* rightshift */
1139 1, /* size (0 = byte, 1 = short, 2 = long) */
1140 16, /* bitsize */
1141 FALSE, /* pc_relative */
1142 0, /* bitpos */
1143 complain_overflow_dont,/* complain_on_overflow */
1144 bfd_elf_generic_reloc, /* special_function */
1145 "R_PPC64_ADDR16_LO_DS",/* name */
1146 FALSE, /* partial_inplace */
1147 0, /* src_mask */
1148 0xfffc, /* dst_mask */
1149 FALSE), /* pcrel_offset */
1150
1151 /* Like R_PPC64_GOT16, but for instructions with a DS field. */
1152 HOWTO (R_PPC64_GOT16_DS, /* type */
1153 0, /* rightshift */
1154 1, /* size (0 = byte, 1 = short, 2 = long) */
1155 16, /* bitsize */
1156 FALSE, /* pc_relative */
1157 0, /* bitpos */
1158 complain_overflow_signed, /* complain_on_overflow */
1159 ppc64_elf_unhandled_reloc, /* special_function */
1160 "R_PPC64_GOT16_DS", /* name */
1161 FALSE, /* partial_inplace */
1162 0, /* src_mask */
1163 0xfffc, /* dst_mask */
1164 FALSE), /* pcrel_offset */
1165
1166 /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
1167 HOWTO (R_PPC64_GOT16_LO_DS, /* type */
1168 0, /* rightshift */
1169 1, /* size (0 = byte, 1 = short, 2 = long) */
1170 16, /* bitsize */
1171 FALSE, /* pc_relative */
1172 0, /* bitpos */
1173 complain_overflow_dont, /* complain_on_overflow */
1174 ppc64_elf_unhandled_reloc, /* special_function */
1175 "R_PPC64_GOT16_LO_DS", /* name */
1176 FALSE, /* partial_inplace */
1177 0, /* src_mask */
1178 0xfffc, /* dst_mask */
1179 FALSE), /* pcrel_offset */
1180
1181 /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
1182 HOWTO (R_PPC64_PLT16_LO_DS, /* type */
1183 0, /* rightshift */
1184 1, /* size (0 = byte, 1 = short, 2 = long) */
1185 16, /* bitsize */
1186 FALSE, /* pc_relative */
1187 0, /* bitpos */
1188 complain_overflow_dont, /* complain_on_overflow */
1189 ppc64_elf_unhandled_reloc, /* special_function */
1190 "R_PPC64_PLT16_LO_DS", /* name */
1191 FALSE, /* partial_inplace */
1192 0, /* src_mask */
1193 0xfffc, /* dst_mask */
1194 FALSE), /* pcrel_offset */
1195
1196 /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
1197 HOWTO (R_PPC64_SECTOFF_DS, /* type */
1198 0, /* rightshift */
1199 1, /* size (0 = byte, 1 = short, 2 = long) */
1200 16, /* bitsize */
1201 FALSE, /* pc_relative */
1202 0, /* bitpos */
1203 complain_overflow_signed, /* complain_on_overflow */
1204 ppc64_elf_sectoff_reloc, /* special_function */
1205 "R_PPC64_SECTOFF_DS", /* name */
1206 FALSE, /* partial_inplace */
1207 0, /* src_mask */
1208 0xfffc, /* dst_mask */
1209 FALSE), /* pcrel_offset */
1210
1211 /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
1212 HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */
1213 0, /* rightshift */
1214 1, /* size (0 = byte, 1 = short, 2 = long) */
1215 16, /* bitsize */
1216 FALSE, /* pc_relative */
1217 0, /* bitpos */
1218 complain_overflow_dont, /* complain_on_overflow */
1219 ppc64_elf_sectoff_reloc, /* special_function */
1220 "R_PPC64_SECTOFF_LO_DS",/* name */
1221 FALSE, /* partial_inplace */
1222 0, /* src_mask */
1223 0xfffc, /* dst_mask */
1224 FALSE), /* pcrel_offset */
1225
1226 /* Like R_PPC64_TOC16, but for instructions with a DS field. */
1227 HOWTO (R_PPC64_TOC16_DS, /* type */
1228 0, /* rightshift */
1229 1, /* size (0 = byte, 1 = short, 2 = long) */
1230 16, /* bitsize */
1231 FALSE, /* pc_relative */
1232 0, /* bitpos */
1233 complain_overflow_signed, /* complain_on_overflow */
1234 ppc64_elf_toc_reloc, /* special_function */
1235 "R_PPC64_TOC16_DS", /* name */
1236 FALSE, /* partial_inplace */
1237 0, /* src_mask */
1238 0xfffc, /* dst_mask */
1239 FALSE), /* pcrel_offset */
1240
1241 /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
1242 HOWTO (R_PPC64_TOC16_LO_DS, /* type */
1243 0, /* rightshift */
1244 1, /* size (0 = byte, 1 = short, 2 = long) */
1245 16, /* bitsize */
1246 FALSE, /* pc_relative */
1247 0, /* bitpos */
1248 complain_overflow_dont, /* complain_on_overflow */
1249 ppc64_elf_toc_reloc, /* special_function */
1250 "R_PPC64_TOC16_LO_DS", /* name */
1251 FALSE, /* partial_inplace */
1252 0, /* src_mask */
1253 0xfffc, /* dst_mask */
1254 FALSE), /* pcrel_offset */
1255
1256 /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
1257 /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
1258 HOWTO (R_PPC64_PLTGOT16_DS, /* type */
1259 0, /* rightshift */
1260 1, /* size (0 = byte, 1 = short, 2 = long) */
1261 16, /* bitsize */
1262 FALSE, /* pc_relative */
1263 0, /* bitpos */
1264 complain_overflow_signed, /* complain_on_overflow */
1265 ppc64_elf_unhandled_reloc, /* special_function */
1266 "R_PPC64_PLTGOT16_DS", /* name */
1267 FALSE, /* partial_inplace */
1268 0, /* src_mask */
1269 0xfffc, /* dst_mask */
1270 FALSE), /* pcrel_offset */
1271
1272 /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */
1273 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1274 HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */
1275 0, /* rightshift */
1276 1, /* size (0 = byte, 1 = short, 2 = long) */
1277 16, /* bitsize */
1278 FALSE, /* pc_relative */
1279 0, /* bitpos */
1280 complain_overflow_dont, /* complain_on_overflow */
1281 ppc64_elf_unhandled_reloc, /* special_function */
1282 "R_PPC64_PLTGOT16_LO_DS",/* name */
1283 FALSE, /* partial_inplace */
1284 0, /* src_mask */
1285 0xfffc, /* dst_mask */
1286 FALSE), /* pcrel_offset */
1287
1288 /* Marker relocs for TLS. */
1289 HOWTO (R_PPC64_TLS,
1290 0, /* rightshift */
1291 2, /* size (0 = byte, 1 = short, 2 = long) */
1292 32, /* bitsize */
1293 FALSE, /* pc_relative */
1294 0, /* bitpos */
1295 complain_overflow_dont, /* complain_on_overflow */
1296 bfd_elf_generic_reloc, /* special_function */
1297 "R_PPC64_TLS", /* name */
1298 FALSE, /* partial_inplace */
1299 0, /* src_mask */
1300 0, /* dst_mask */
1301 FALSE), /* pcrel_offset */
1302
1303 HOWTO (R_PPC64_TLSGD,
1304 0, /* rightshift */
1305 2, /* size (0 = byte, 1 = short, 2 = long) */
1306 32, /* bitsize */
1307 FALSE, /* pc_relative */
1308 0, /* bitpos */
1309 complain_overflow_dont, /* complain_on_overflow */
1310 bfd_elf_generic_reloc, /* special_function */
1311 "R_PPC64_TLSGD", /* name */
1312 FALSE, /* partial_inplace */
1313 0, /* src_mask */
1314 0, /* dst_mask */
1315 FALSE), /* pcrel_offset */
1316
1317 HOWTO (R_PPC64_TLSLD,
1318 0, /* rightshift */
1319 2, /* size (0 = byte, 1 = short, 2 = long) */
1320 32, /* bitsize */
1321 FALSE, /* pc_relative */
1322 0, /* bitpos */
1323 complain_overflow_dont, /* complain_on_overflow */
1324 bfd_elf_generic_reloc, /* special_function */
1325 "R_PPC64_TLSLD", /* name */
1326 FALSE, /* partial_inplace */
1327 0, /* src_mask */
1328 0, /* dst_mask */
1329 FALSE), /* pcrel_offset */
1330
1331 HOWTO (R_PPC64_TOCSAVE,
1332 0, /* rightshift */
1333 2, /* size (0 = byte, 1 = short, 2 = long) */
1334 32, /* bitsize */
1335 FALSE, /* pc_relative */
1336 0, /* bitpos */
1337 complain_overflow_dont, /* complain_on_overflow */
1338 bfd_elf_generic_reloc, /* special_function */
1339 "R_PPC64_TOCSAVE", /* name */
1340 FALSE, /* partial_inplace */
1341 0, /* src_mask */
1342 0, /* dst_mask */
1343 FALSE), /* pcrel_offset */
1344
1345 /* Computes the load module index of the load module that contains the
1346 definition of its TLS sym. */
1347 HOWTO (R_PPC64_DTPMOD64,
1348 0, /* rightshift */
1349 4, /* size (0 = byte, 1 = short, 2 = long) */
1350 64, /* bitsize */
1351 FALSE, /* pc_relative */
1352 0, /* bitpos */
1353 complain_overflow_dont, /* complain_on_overflow */
1354 ppc64_elf_unhandled_reloc, /* special_function */
1355 "R_PPC64_DTPMOD64", /* name */
1356 FALSE, /* partial_inplace */
1357 0, /* src_mask */
1358 ONES (64), /* dst_mask */
1359 FALSE), /* pcrel_offset */
1360
1361 /* Computes a dtv-relative displacement, the difference between the value
1362 of sym+add and the base address of the thread-local storage block that
1363 contains the definition of sym, minus 0x8000. */
1364 HOWTO (R_PPC64_DTPREL64,
1365 0, /* rightshift */
1366 4, /* size (0 = byte, 1 = short, 2 = long) */
1367 64, /* bitsize */
1368 FALSE, /* pc_relative */
1369 0, /* bitpos */
1370 complain_overflow_dont, /* complain_on_overflow */
1371 ppc64_elf_unhandled_reloc, /* special_function */
1372 "R_PPC64_DTPREL64", /* name */
1373 FALSE, /* partial_inplace */
1374 0, /* src_mask */
1375 ONES (64), /* dst_mask */
1376 FALSE), /* pcrel_offset */
1377
1378 /* A 16 bit dtprel reloc. */
1379 HOWTO (R_PPC64_DTPREL16,
1380 0, /* rightshift */
1381 1, /* size (0 = byte, 1 = short, 2 = long) */
1382 16, /* bitsize */
1383 FALSE, /* pc_relative */
1384 0, /* bitpos */
1385 complain_overflow_signed, /* complain_on_overflow */
1386 ppc64_elf_unhandled_reloc, /* special_function */
1387 "R_PPC64_DTPREL16", /* name */
1388 FALSE, /* partial_inplace */
1389 0, /* src_mask */
1390 0xffff, /* dst_mask */
1391 FALSE), /* pcrel_offset */
1392
1393 /* Like DTPREL16, but no overflow. */
1394 HOWTO (R_PPC64_DTPREL16_LO,
1395 0, /* rightshift */
1396 1, /* size (0 = byte, 1 = short, 2 = long) */
1397 16, /* bitsize */
1398 FALSE, /* pc_relative */
1399 0, /* bitpos */
1400 complain_overflow_dont, /* complain_on_overflow */
1401 ppc64_elf_unhandled_reloc, /* special_function */
1402 "R_PPC64_DTPREL16_LO", /* name */
1403 FALSE, /* partial_inplace */
1404 0, /* src_mask */
1405 0xffff, /* dst_mask */
1406 FALSE), /* pcrel_offset */
1407
1408 /* Like DTPREL16_LO, but next higher group of 16 bits. */
1409 HOWTO (R_PPC64_DTPREL16_HI,
1410 16, /* rightshift */
1411 1, /* size (0 = byte, 1 = short, 2 = long) */
1412 16, /* bitsize */
1413 FALSE, /* pc_relative */
1414 0, /* bitpos */
1415 complain_overflow_signed, /* complain_on_overflow */
1416 ppc64_elf_unhandled_reloc, /* special_function */
1417 "R_PPC64_DTPREL16_HI", /* name */
1418 FALSE, /* partial_inplace */
1419 0, /* src_mask */
1420 0xffff, /* dst_mask */
1421 FALSE), /* pcrel_offset */
1422
1423 /* Like DTPREL16_HI, but adjust for low 16 bits. */
1424 HOWTO (R_PPC64_DTPREL16_HA,
1425 16, /* rightshift */
1426 1, /* size (0 = byte, 1 = short, 2 = long) */
1427 16, /* bitsize */
1428 FALSE, /* pc_relative */
1429 0, /* bitpos */
1430 complain_overflow_signed, /* complain_on_overflow */
1431 ppc64_elf_unhandled_reloc, /* special_function */
1432 "R_PPC64_DTPREL16_HA", /* name */
1433 FALSE, /* partial_inplace */
1434 0, /* src_mask */
1435 0xffff, /* dst_mask */
1436 FALSE), /* pcrel_offset */
1437
1438 /* Like DTPREL16_HI, but next higher group of 16 bits. */
1439 HOWTO (R_PPC64_DTPREL16_HIGHER,
1440 32, /* rightshift */
1441 1, /* size (0 = byte, 1 = short, 2 = long) */
1442 16, /* bitsize */
1443 FALSE, /* pc_relative */
1444 0, /* bitpos */
1445 complain_overflow_dont, /* complain_on_overflow */
1446 ppc64_elf_unhandled_reloc, /* special_function */
1447 "R_PPC64_DTPREL16_HIGHER", /* name */
1448 FALSE, /* partial_inplace */
1449 0, /* src_mask */
1450 0xffff, /* dst_mask */
1451 FALSE), /* pcrel_offset */
1452
1453 /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */
1454 HOWTO (R_PPC64_DTPREL16_HIGHERA,
1455 32, /* rightshift */
1456 1, /* size (0 = byte, 1 = short, 2 = long) */
1457 16, /* bitsize */
1458 FALSE, /* pc_relative */
1459 0, /* bitpos */
1460 complain_overflow_dont, /* complain_on_overflow */
1461 ppc64_elf_unhandled_reloc, /* special_function */
1462 "R_PPC64_DTPREL16_HIGHERA", /* name */
1463 FALSE, /* partial_inplace */
1464 0, /* src_mask */
1465 0xffff, /* dst_mask */
1466 FALSE), /* pcrel_offset */
1467
1468 /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */
1469 HOWTO (R_PPC64_DTPREL16_HIGHEST,
1470 48, /* rightshift */
1471 1, /* size (0 = byte, 1 = short, 2 = long) */
1472 16, /* bitsize */
1473 FALSE, /* pc_relative */
1474 0, /* bitpos */
1475 complain_overflow_dont, /* complain_on_overflow */
1476 ppc64_elf_unhandled_reloc, /* special_function */
1477 "R_PPC64_DTPREL16_HIGHEST", /* name */
1478 FALSE, /* partial_inplace */
1479 0, /* src_mask */
1480 0xffff, /* dst_mask */
1481 FALSE), /* pcrel_offset */
1482
1483 /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */
1484 HOWTO (R_PPC64_DTPREL16_HIGHESTA,
1485 48, /* rightshift */
1486 1, /* size (0 = byte, 1 = short, 2 = long) */
1487 16, /* bitsize */
1488 FALSE, /* pc_relative */
1489 0, /* bitpos */
1490 complain_overflow_dont, /* complain_on_overflow */
1491 ppc64_elf_unhandled_reloc, /* special_function */
1492 "R_PPC64_DTPREL16_HIGHESTA", /* name */
1493 FALSE, /* partial_inplace */
1494 0, /* src_mask */
1495 0xffff, /* dst_mask */
1496 FALSE), /* pcrel_offset */
1497
1498 /* Like DTPREL16, but for insns with a DS field. */
1499 HOWTO (R_PPC64_DTPREL16_DS,
1500 0, /* rightshift */
1501 1, /* size (0 = byte, 1 = short, 2 = long) */
1502 16, /* bitsize */
1503 FALSE, /* pc_relative */
1504 0, /* bitpos */
1505 complain_overflow_signed, /* complain_on_overflow */
1506 ppc64_elf_unhandled_reloc, /* special_function */
1507 "R_PPC64_DTPREL16_DS", /* name */
1508 FALSE, /* partial_inplace */
1509 0, /* src_mask */
1510 0xfffc, /* dst_mask */
1511 FALSE), /* pcrel_offset */
1512
1513 /* Like DTPREL16_DS, but no overflow. */
1514 HOWTO (R_PPC64_DTPREL16_LO_DS,
1515 0, /* rightshift */
1516 1, /* size (0 = byte, 1 = short, 2 = long) */
1517 16, /* bitsize */
1518 FALSE, /* pc_relative */
1519 0, /* bitpos */
1520 complain_overflow_dont, /* complain_on_overflow */
1521 ppc64_elf_unhandled_reloc, /* special_function */
1522 "R_PPC64_DTPREL16_LO_DS", /* name */
1523 FALSE, /* partial_inplace */
1524 0, /* src_mask */
1525 0xfffc, /* dst_mask */
1526 FALSE), /* pcrel_offset */
1527
1528 /* Computes a tp-relative displacement, the difference between the value of
1529 sym+add and the value of the thread pointer (r13). */
1530 HOWTO (R_PPC64_TPREL64,
1531 0, /* rightshift */
1532 4, /* size (0 = byte, 1 = short, 2 = long) */
1533 64, /* bitsize */
1534 FALSE, /* pc_relative */
1535 0, /* bitpos */
1536 complain_overflow_dont, /* complain_on_overflow */
1537 ppc64_elf_unhandled_reloc, /* special_function */
1538 "R_PPC64_TPREL64", /* name */
1539 FALSE, /* partial_inplace */
1540 0, /* src_mask */
1541 ONES (64), /* dst_mask */
1542 FALSE), /* pcrel_offset */
1543
1544 /* A 16 bit tprel reloc. */
1545 HOWTO (R_PPC64_TPREL16,
1546 0, /* rightshift */
1547 1, /* size (0 = byte, 1 = short, 2 = long) */
1548 16, /* bitsize */
1549 FALSE, /* pc_relative */
1550 0, /* bitpos */
1551 complain_overflow_signed, /* complain_on_overflow */
1552 ppc64_elf_unhandled_reloc, /* special_function */
1553 "R_PPC64_TPREL16", /* name */
1554 FALSE, /* partial_inplace */
1555 0, /* src_mask */
1556 0xffff, /* dst_mask */
1557 FALSE), /* pcrel_offset */
1558
1559 /* Like TPREL16, but no overflow. */
1560 HOWTO (R_PPC64_TPREL16_LO,
1561 0, /* rightshift */
1562 1, /* size (0 = byte, 1 = short, 2 = long) */
1563 16, /* bitsize */
1564 FALSE, /* pc_relative */
1565 0, /* bitpos */
1566 complain_overflow_dont, /* complain_on_overflow */
1567 ppc64_elf_unhandled_reloc, /* special_function */
1568 "R_PPC64_TPREL16_LO", /* name */
1569 FALSE, /* partial_inplace */
1570 0, /* src_mask */
1571 0xffff, /* dst_mask */
1572 FALSE), /* pcrel_offset */
1573
1574 /* Like TPREL16_LO, but next higher group of 16 bits. */
1575 HOWTO (R_PPC64_TPREL16_HI,
1576 16, /* rightshift */
1577 1, /* size (0 = byte, 1 = short, 2 = long) */
1578 16, /* bitsize */
1579 FALSE, /* pc_relative */
1580 0, /* bitpos */
1581 complain_overflow_signed, /* complain_on_overflow */
1582 ppc64_elf_unhandled_reloc, /* special_function */
1583 "R_PPC64_TPREL16_HI", /* name */
1584 FALSE, /* partial_inplace */
1585 0, /* src_mask */
1586 0xffff, /* dst_mask */
1587 FALSE), /* pcrel_offset */
1588
1589 /* Like TPREL16_HI, but adjust for low 16 bits. */
1590 HOWTO (R_PPC64_TPREL16_HA,
1591 16, /* rightshift */
1592 1, /* size (0 = byte, 1 = short, 2 = long) */
1593 16, /* bitsize */
1594 FALSE, /* pc_relative */
1595 0, /* bitpos */
1596 complain_overflow_signed, /* complain_on_overflow */
1597 ppc64_elf_unhandled_reloc, /* special_function */
1598 "R_PPC64_TPREL16_HA", /* name */
1599 FALSE, /* partial_inplace */
1600 0, /* src_mask */
1601 0xffff, /* dst_mask */
1602 FALSE), /* pcrel_offset */
1603
1604 /* Like TPREL16_HI, but next higher group of 16 bits. */
1605 HOWTO (R_PPC64_TPREL16_HIGHER,
1606 32, /* rightshift */
1607 1, /* size (0 = byte, 1 = short, 2 = long) */
1608 16, /* bitsize */
1609 FALSE, /* pc_relative */
1610 0, /* bitpos */
1611 complain_overflow_dont, /* complain_on_overflow */
1612 ppc64_elf_unhandled_reloc, /* special_function */
1613 "R_PPC64_TPREL16_HIGHER", /* name */
1614 FALSE, /* partial_inplace */
1615 0, /* src_mask */
1616 0xffff, /* dst_mask */
1617 FALSE), /* pcrel_offset */
1618
1619 /* Like TPREL16_HIGHER, but adjust for low 16 bits. */
1620 HOWTO (R_PPC64_TPREL16_HIGHERA,
1621 32, /* rightshift */
1622 1, /* size (0 = byte, 1 = short, 2 = long) */
1623 16, /* bitsize */
1624 FALSE, /* pc_relative */
1625 0, /* bitpos */
1626 complain_overflow_dont, /* complain_on_overflow */
1627 ppc64_elf_unhandled_reloc, /* special_function */
1628 "R_PPC64_TPREL16_HIGHERA", /* name */
1629 FALSE, /* partial_inplace */
1630 0, /* src_mask */
1631 0xffff, /* dst_mask */
1632 FALSE), /* pcrel_offset */
1633
1634 /* Like TPREL16_HIGHER, but next higher group of 16 bits. */
1635 HOWTO (R_PPC64_TPREL16_HIGHEST,
1636 48, /* rightshift */
1637 1, /* size (0 = byte, 1 = short, 2 = long) */
1638 16, /* bitsize */
1639 FALSE, /* pc_relative */
1640 0, /* bitpos */
1641 complain_overflow_dont, /* complain_on_overflow */
1642 ppc64_elf_unhandled_reloc, /* special_function */
1643 "R_PPC64_TPREL16_HIGHEST", /* name */
1644 FALSE, /* partial_inplace */
1645 0, /* src_mask */
1646 0xffff, /* dst_mask */
1647 FALSE), /* pcrel_offset */
1648
1649 /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */
1650 HOWTO (R_PPC64_TPREL16_HIGHESTA,
1651 48, /* rightshift */
1652 1, /* size (0 = byte, 1 = short, 2 = long) */
1653 16, /* bitsize */
1654 FALSE, /* pc_relative */
1655 0, /* bitpos */
1656 complain_overflow_dont, /* complain_on_overflow */
1657 ppc64_elf_unhandled_reloc, /* special_function */
1658 "R_PPC64_TPREL16_HIGHESTA", /* name */
1659 FALSE, /* partial_inplace */
1660 0, /* src_mask */
1661 0xffff, /* dst_mask */
1662 FALSE), /* pcrel_offset */
1663
1664 /* Like TPREL16, but for insns with a DS field. */
1665 HOWTO (R_PPC64_TPREL16_DS,
1666 0, /* rightshift */
1667 1, /* size (0 = byte, 1 = short, 2 = long) */
1668 16, /* bitsize */
1669 FALSE, /* pc_relative */
1670 0, /* bitpos */
1671 complain_overflow_signed, /* complain_on_overflow */
1672 ppc64_elf_unhandled_reloc, /* special_function */
1673 "R_PPC64_TPREL16_DS", /* name */
1674 FALSE, /* partial_inplace */
1675 0, /* src_mask */
1676 0xfffc, /* dst_mask */
1677 FALSE), /* pcrel_offset */
1678
1679 /* Like TPREL16_DS, but no overflow. */
1680 HOWTO (R_PPC64_TPREL16_LO_DS,
1681 0, /* rightshift */
1682 1, /* size (0 = byte, 1 = short, 2 = long) */
1683 16, /* bitsize */
1684 FALSE, /* pc_relative */
1685 0, /* bitpos */
1686 complain_overflow_dont, /* complain_on_overflow */
1687 ppc64_elf_unhandled_reloc, /* special_function */
1688 "R_PPC64_TPREL16_LO_DS", /* name */
1689 FALSE, /* partial_inplace */
1690 0, /* src_mask */
1691 0xfffc, /* dst_mask */
1692 FALSE), /* pcrel_offset */
1693
1694 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1695 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1696 to the first entry relative to the TOC base (r2). */
1697 HOWTO (R_PPC64_GOT_TLSGD16,
1698 0, /* rightshift */
1699 1, /* size (0 = byte, 1 = short, 2 = long) */
1700 16, /* bitsize */
1701 FALSE, /* pc_relative */
1702 0, /* bitpos */
1703 complain_overflow_signed, /* complain_on_overflow */
1704 ppc64_elf_unhandled_reloc, /* special_function */
1705 "R_PPC64_GOT_TLSGD16", /* name */
1706 FALSE, /* partial_inplace */
1707 0, /* src_mask */
1708 0xffff, /* dst_mask */
1709 FALSE), /* pcrel_offset */
1710
1711 /* Like GOT_TLSGD16, but no overflow. */
1712 HOWTO (R_PPC64_GOT_TLSGD16_LO,
1713 0, /* rightshift */
1714 1, /* size (0 = byte, 1 = short, 2 = long) */
1715 16, /* bitsize */
1716 FALSE, /* pc_relative */
1717 0, /* bitpos */
1718 complain_overflow_dont, /* complain_on_overflow */
1719 ppc64_elf_unhandled_reloc, /* special_function */
1720 "R_PPC64_GOT_TLSGD16_LO", /* name */
1721 FALSE, /* partial_inplace */
1722 0, /* src_mask */
1723 0xffff, /* dst_mask */
1724 FALSE), /* pcrel_offset */
1725
1726 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1727 HOWTO (R_PPC64_GOT_TLSGD16_HI,
1728 16, /* rightshift */
1729 1, /* size (0 = byte, 1 = short, 2 = long) */
1730 16, /* bitsize */
1731 FALSE, /* pc_relative */
1732 0, /* bitpos */
1733 complain_overflow_signed, /* complain_on_overflow */
1734 ppc64_elf_unhandled_reloc, /* special_function */
1735 "R_PPC64_GOT_TLSGD16_HI", /* name */
1736 FALSE, /* partial_inplace */
1737 0, /* src_mask */
1738 0xffff, /* dst_mask */
1739 FALSE), /* pcrel_offset */
1740
1741 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1742 HOWTO (R_PPC64_GOT_TLSGD16_HA,
1743 16, /* rightshift */
1744 1, /* size (0 = byte, 1 = short, 2 = long) */
1745 16, /* bitsize */
1746 FALSE, /* pc_relative */
1747 0, /* bitpos */
1748 complain_overflow_signed, /* complain_on_overflow */
1749 ppc64_elf_unhandled_reloc, /* special_function */
1750 "R_PPC64_GOT_TLSGD16_HA", /* name */
1751 FALSE, /* partial_inplace */
1752 0, /* src_mask */
1753 0xffff, /* dst_mask */
1754 FALSE), /* pcrel_offset */
1755
1756 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1757 with values (sym+add)@dtpmod and zero, and computes the offset to the
1758 first entry relative to the TOC base (r2). */
1759 HOWTO (R_PPC64_GOT_TLSLD16,
1760 0, /* rightshift */
1761 1, /* size (0 = byte, 1 = short, 2 = long) */
1762 16, /* bitsize */
1763 FALSE, /* pc_relative */
1764 0, /* bitpos */
1765 complain_overflow_signed, /* complain_on_overflow */
1766 ppc64_elf_unhandled_reloc, /* special_function */
1767 "R_PPC64_GOT_TLSLD16", /* name */
1768 FALSE, /* partial_inplace */
1769 0, /* src_mask */
1770 0xffff, /* dst_mask */
1771 FALSE), /* pcrel_offset */
1772
1773 /* Like GOT_TLSLD16, but no overflow. */
1774 HOWTO (R_PPC64_GOT_TLSLD16_LO,
1775 0, /* rightshift */
1776 1, /* size (0 = byte, 1 = short, 2 = long) */
1777 16, /* bitsize */
1778 FALSE, /* pc_relative */
1779 0, /* bitpos */
1780 complain_overflow_dont, /* complain_on_overflow */
1781 ppc64_elf_unhandled_reloc, /* special_function */
1782 "R_PPC64_GOT_TLSLD16_LO", /* name */
1783 FALSE, /* partial_inplace */
1784 0, /* src_mask */
1785 0xffff, /* dst_mask */
1786 FALSE), /* pcrel_offset */
1787
1788 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1789 HOWTO (R_PPC64_GOT_TLSLD16_HI,
1790 16, /* rightshift */
1791 1, /* size (0 = byte, 1 = short, 2 = long) */
1792 16, /* bitsize */
1793 FALSE, /* pc_relative */
1794 0, /* bitpos */
1795 complain_overflow_signed, /* complain_on_overflow */
1796 ppc64_elf_unhandled_reloc, /* special_function */
1797 "R_PPC64_GOT_TLSLD16_HI", /* name */
1798 FALSE, /* partial_inplace */
1799 0, /* src_mask */
1800 0xffff, /* dst_mask */
1801 FALSE), /* pcrel_offset */
1802
1803 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1804 HOWTO (R_PPC64_GOT_TLSLD16_HA,
1805 16, /* rightshift */
1806 1, /* size (0 = byte, 1 = short, 2 = long) */
1807 16, /* bitsize */
1808 FALSE, /* pc_relative */
1809 0, /* bitpos */
1810 complain_overflow_signed, /* complain_on_overflow */
1811 ppc64_elf_unhandled_reloc, /* special_function */
1812 "R_PPC64_GOT_TLSLD16_HA", /* name */
1813 FALSE, /* partial_inplace */
1814 0, /* src_mask */
1815 0xffff, /* dst_mask */
1816 FALSE), /* pcrel_offset */
1817
1818 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1819 the offset to the entry relative to the TOC base (r2). */
1820 HOWTO (R_PPC64_GOT_DTPREL16_DS,
1821 0, /* rightshift */
1822 1, /* size (0 = byte, 1 = short, 2 = long) */
1823 16, /* bitsize */
1824 FALSE, /* pc_relative */
1825 0, /* bitpos */
1826 complain_overflow_signed, /* complain_on_overflow */
1827 ppc64_elf_unhandled_reloc, /* special_function */
1828 "R_PPC64_GOT_DTPREL16_DS", /* name */
1829 FALSE, /* partial_inplace */
1830 0, /* src_mask */
1831 0xfffc, /* dst_mask */
1832 FALSE), /* pcrel_offset */
1833
1834 /* Like GOT_DTPREL16_DS, but no overflow. */
1835 HOWTO (R_PPC64_GOT_DTPREL16_LO_DS,
1836 0, /* rightshift */
1837 1, /* size (0 = byte, 1 = short, 2 = long) */
1838 16, /* bitsize */
1839 FALSE, /* pc_relative */
1840 0, /* bitpos */
1841 complain_overflow_dont, /* complain_on_overflow */
1842 ppc64_elf_unhandled_reloc, /* special_function */
1843 "R_PPC64_GOT_DTPREL16_LO_DS", /* name */
1844 FALSE, /* partial_inplace */
1845 0, /* src_mask */
1846 0xfffc, /* dst_mask */
1847 FALSE), /* pcrel_offset */
1848
1849 /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */
1850 HOWTO (R_PPC64_GOT_DTPREL16_HI,
1851 16, /* rightshift */
1852 1, /* size (0 = byte, 1 = short, 2 = long) */
1853 16, /* bitsize */
1854 FALSE, /* pc_relative */
1855 0, /* bitpos */
1856 complain_overflow_signed, /* complain_on_overflow */
1857 ppc64_elf_unhandled_reloc, /* special_function */
1858 "R_PPC64_GOT_DTPREL16_HI", /* name */
1859 FALSE, /* partial_inplace */
1860 0, /* src_mask */
1861 0xffff, /* dst_mask */
1862 FALSE), /* pcrel_offset */
1863
1864 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1865 HOWTO (R_PPC64_GOT_DTPREL16_HA,
1866 16, /* rightshift */
1867 1, /* size (0 = byte, 1 = short, 2 = long) */
1868 16, /* bitsize */
1869 FALSE, /* pc_relative */
1870 0, /* bitpos */
1871 complain_overflow_signed, /* complain_on_overflow */
1872 ppc64_elf_unhandled_reloc, /* special_function */
1873 "R_PPC64_GOT_DTPREL16_HA", /* name */
1874 FALSE, /* partial_inplace */
1875 0, /* src_mask */
1876 0xffff, /* dst_mask */
1877 FALSE), /* pcrel_offset */
1878
1879 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1880 offset to the entry relative to the TOC base (r2). */
1881 HOWTO (R_PPC64_GOT_TPREL16_DS,
1882 0, /* rightshift */
1883 1, /* size (0 = byte, 1 = short, 2 = long) */
1884 16, /* bitsize */
1885 FALSE, /* pc_relative */
1886 0, /* bitpos */
1887 complain_overflow_signed, /* complain_on_overflow */
1888 ppc64_elf_unhandled_reloc, /* special_function */
1889 "R_PPC64_GOT_TPREL16_DS", /* name */
1890 FALSE, /* partial_inplace */
1891 0, /* src_mask */
1892 0xfffc, /* dst_mask */
1893 FALSE), /* pcrel_offset */
1894
1895 /* Like GOT_TPREL16_DS, but no overflow. */
1896 HOWTO (R_PPC64_GOT_TPREL16_LO_DS,
1897 0, /* rightshift */
1898 1, /* size (0 = byte, 1 = short, 2 = long) */
1899 16, /* bitsize */
1900 FALSE, /* pc_relative */
1901 0, /* bitpos */
1902 complain_overflow_dont, /* complain_on_overflow */
1903 ppc64_elf_unhandled_reloc, /* special_function */
1904 "R_PPC64_GOT_TPREL16_LO_DS", /* name */
1905 FALSE, /* partial_inplace */
1906 0, /* src_mask */
1907 0xfffc, /* dst_mask */
1908 FALSE), /* pcrel_offset */
1909
1910 /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */
1911 HOWTO (R_PPC64_GOT_TPREL16_HI,
1912 16, /* rightshift */
1913 1, /* size (0 = byte, 1 = short, 2 = long) */
1914 16, /* bitsize */
1915 FALSE, /* pc_relative */
1916 0, /* bitpos */
1917 complain_overflow_signed, /* complain_on_overflow */
1918 ppc64_elf_unhandled_reloc, /* special_function */
1919 "R_PPC64_GOT_TPREL16_HI", /* name */
1920 FALSE, /* partial_inplace */
1921 0, /* src_mask */
1922 0xffff, /* dst_mask */
1923 FALSE), /* pcrel_offset */
1924
1925 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1926 HOWTO (R_PPC64_GOT_TPREL16_HA,
1927 16, /* rightshift */
1928 1, /* size (0 = byte, 1 = short, 2 = long) */
1929 16, /* bitsize */
1930 FALSE, /* pc_relative */
1931 0, /* bitpos */
1932 complain_overflow_signed, /* complain_on_overflow */
1933 ppc64_elf_unhandled_reloc, /* special_function */
1934 "R_PPC64_GOT_TPREL16_HA", /* name */
1935 FALSE, /* partial_inplace */
1936 0, /* src_mask */
1937 0xffff, /* dst_mask */
1938 FALSE), /* pcrel_offset */
1939
1940 HOWTO (R_PPC64_JMP_IREL, /* type */
1941 0, /* rightshift */
1942 0, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1943 0, /* bitsize */
1944 FALSE, /* pc_relative */
1945 0, /* bitpos */
1946 complain_overflow_dont, /* complain_on_overflow */
1947 ppc64_elf_unhandled_reloc, /* special_function */
1948 "R_PPC64_JMP_IREL", /* name */
1949 FALSE, /* partial_inplace */
1950 0, /* src_mask */
1951 0, /* dst_mask */
1952 FALSE), /* pcrel_offset */
1953
1954 HOWTO (R_PPC64_IRELATIVE, /* type */
1955 0, /* rightshift */
1956 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1957 64, /* bitsize */
1958 FALSE, /* pc_relative */
1959 0, /* bitpos */
1960 complain_overflow_dont, /* complain_on_overflow */
1961 bfd_elf_generic_reloc, /* special_function */
1962 "R_PPC64_IRELATIVE", /* name */
1963 FALSE, /* partial_inplace */
1964 0, /* src_mask */
1965 ONES (64), /* dst_mask */
1966 FALSE), /* pcrel_offset */
1967
1968 /* A 16 bit relative relocation. */
1969 HOWTO (R_PPC64_REL16, /* type */
1970 0, /* rightshift */
1971 1, /* size (0 = byte, 1 = short, 2 = long) */
1972 16, /* bitsize */
1973 TRUE, /* pc_relative */
1974 0, /* bitpos */
1975 complain_overflow_signed, /* complain_on_overflow */
1976 bfd_elf_generic_reloc, /* special_function */
1977 "R_PPC64_REL16", /* name */
1978 FALSE, /* partial_inplace */
1979 0, /* src_mask */
1980 0xffff, /* dst_mask */
1981 TRUE), /* pcrel_offset */
1982
1983 /* A 16 bit relative relocation without overflow. */
1984 HOWTO (R_PPC64_REL16_LO, /* type */
1985 0, /* rightshift */
1986 1, /* size (0 = byte, 1 = short, 2 = long) */
1987 16, /* bitsize */
1988 TRUE, /* pc_relative */
1989 0, /* bitpos */
1990 complain_overflow_dont,/* complain_on_overflow */
1991 bfd_elf_generic_reloc, /* special_function */
1992 "R_PPC64_REL16_LO", /* name */
1993 FALSE, /* partial_inplace */
1994 0, /* src_mask */
1995 0xffff, /* dst_mask */
1996 TRUE), /* pcrel_offset */
1997
1998 /* The high order 16 bits of a relative address. */
1999 HOWTO (R_PPC64_REL16_HI, /* type */
2000 16, /* rightshift */
2001 1, /* size (0 = byte, 1 = short, 2 = long) */
2002 16, /* bitsize */
2003 TRUE, /* pc_relative */
2004 0, /* bitpos */
2005 complain_overflow_signed, /* complain_on_overflow */
2006 bfd_elf_generic_reloc, /* special_function */
2007 "R_PPC64_REL16_HI", /* name */
2008 FALSE, /* partial_inplace */
2009 0, /* src_mask */
2010 0xffff, /* dst_mask */
2011 TRUE), /* pcrel_offset */
2012
2013 /* The high order 16 bits of a relative address, plus 1 if the contents of
2014 the low 16 bits, treated as a signed number, is negative. */
2015 HOWTO (R_PPC64_REL16_HA, /* type */
2016 16, /* rightshift */
2017 1, /* size (0 = byte, 1 = short, 2 = long) */
2018 16, /* bitsize */
2019 TRUE, /* pc_relative */
2020 0, /* bitpos */
2021 complain_overflow_signed, /* complain_on_overflow */
2022 ppc64_elf_ha_reloc, /* special_function */
2023 "R_PPC64_REL16_HA", /* name */
2024 FALSE, /* partial_inplace */
2025 0, /* src_mask */
2026 0xffff, /* dst_mask */
2027 TRUE), /* pcrel_offset */
2028
2029 /* Like R_PPC64_REL16_HA but for split field in addpcis. */
2030 HOWTO (R_PPC64_REL16DX_HA, /* type */
2031 16, /* rightshift */
2032 2, /* size (0 = byte, 1 = short, 2 = long) */
2033 16, /* bitsize */
2034 TRUE, /* pc_relative */
2035 0, /* bitpos */
2036 complain_overflow_signed, /* complain_on_overflow */
2037 ppc64_elf_ha_reloc, /* special_function */
2038 "R_PPC64_REL16DX_HA", /* name */
2039 FALSE, /* partial_inplace */
2040 0, /* src_mask */
2041 0x1fffc1, /* dst_mask */
2042 TRUE), /* pcrel_offset */
2043
2044 /* Like R_PPC64_ADDR16_HI, but no overflow. */
2045 HOWTO (R_PPC64_ADDR16_HIGH, /* type */
2046 16, /* rightshift */
2047 1, /* size (0 = byte, 1 = short, 2 = long) */
2048 16, /* bitsize */
2049 FALSE, /* pc_relative */
2050 0, /* bitpos */
2051 complain_overflow_dont, /* complain_on_overflow */
2052 bfd_elf_generic_reloc, /* special_function */
2053 "R_PPC64_ADDR16_HIGH", /* name */
2054 FALSE, /* partial_inplace */
2055 0, /* src_mask */
2056 0xffff, /* dst_mask */
2057 FALSE), /* pcrel_offset */
2058
2059 /* Like R_PPC64_ADDR16_HA, but no overflow. */
2060 HOWTO (R_PPC64_ADDR16_HIGHA, /* type */
2061 16, /* rightshift */
2062 1, /* size (0 = byte, 1 = short, 2 = long) */
2063 16, /* bitsize */
2064 FALSE, /* pc_relative */
2065 0, /* bitpos */
2066 complain_overflow_dont, /* complain_on_overflow */
2067 ppc64_elf_ha_reloc, /* special_function */
2068 "R_PPC64_ADDR16_HIGHA", /* name */
2069 FALSE, /* partial_inplace */
2070 0, /* src_mask */
2071 0xffff, /* dst_mask */
2072 FALSE), /* pcrel_offset */
2073
2074 /* Like R_PPC64_DTPREL16_HI, but no overflow. */
2075 HOWTO (R_PPC64_DTPREL16_HIGH,
2076 16, /* rightshift */
2077 1, /* size (0 = byte, 1 = short, 2 = long) */
2078 16, /* bitsize */
2079 FALSE, /* pc_relative */
2080 0, /* bitpos */
2081 complain_overflow_dont, /* complain_on_overflow */
2082 ppc64_elf_unhandled_reloc, /* special_function */
2083 "R_PPC64_DTPREL16_HIGH", /* name */
2084 FALSE, /* partial_inplace */
2085 0, /* src_mask */
2086 0xffff, /* dst_mask */
2087 FALSE), /* pcrel_offset */
2088
2089 /* Like R_PPC64_DTPREL16_HA, but no overflow. */
2090 HOWTO (R_PPC64_DTPREL16_HIGHA,
2091 16, /* rightshift */
2092 1, /* size (0 = byte, 1 = short, 2 = long) */
2093 16, /* bitsize */
2094 FALSE, /* pc_relative */
2095 0, /* bitpos */
2096 complain_overflow_dont, /* complain_on_overflow */
2097 ppc64_elf_unhandled_reloc, /* special_function */
2098 "R_PPC64_DTPREL16_HIGHA", /* name */
2099 FALSE, /* partial_inplace */
2100 0, /* src_mask */
2101 0xffff, /* dst_mask */
2102 FALSE), /* pcrel_offset */
2103
2104 /* Like R_PPC64_TPREL16_HI, but no overflow. */
2105 HOWTO (R_PPC64_TPREL16_HIGH,
2106 16, /* rightshift */
2107 1, /* size (0 = byte, 1 = short, 2 = long) */
2108 16, /* bitsize */
2109 FALSE, /* pc_relative */
2110 0, /* bitpos */
2111 complain_overflow_dont, /* complain_on_overflow */
2112 ppc64_elf_unhandled_reloc, /* special_function */
2113 "R_PPC64_TPREL16_HIGH", /* name */
2114 FALSE, /* partial_inplace */
2115 0, /* src_mask */
2116 0xffff, /* dst_mask */
2117 FALSE), /* pcrel_offset */
2118
2119 /* Like R_PPC64_TPREL16_HA, but no overflow. */
2120 HOWTO (R_PPC64_TPREL16_HIGHA,
2121 16, /* rightshift */
2122 1, /* size (0 = byte, 1 = short, 2 = long) */
2123 16, /* bitsize */
2124 FALSE, /* pc_relative */
2125 0, /* bitpos */
2126 complain_overflow_dont, /* complain_on_overflow */
2127 ppc64_elf_unhandled_reloc, /* special_function */
2128 "R_PPC64_TPREL16_HIGHA", /* name */
2129 FALSE, /* partial_inplace */
2130 0, /* src_mask */
2131 0xffff, /* dst_mask */
2132 FALSE), /* pcrel_offset */
2133
2134 /* Marker reloc on ELFv2 large-model function entry. */
2135 HOWTO (R_PPC64_ENTRY,
2136 0, /* rightshift */
2137 2, /* size (0 = byte, 1 = short, 2 = long) */
2138 32, /* bitsize */
2139 FALSE, /* pc_relative */
2140 0, /* bitpos */
2141 complain_overflow_dont, /* complain_on_overflow */
2142 bfd_elf_generic_reloc, /* special_function */
2143 "R_PPC64_ENTRY", /* name */
2144 FALSE, /* partial_inplace */
2145 0, /* src_mask */
2146 0, /* dst_mask */
2147 FALSE), /* pcrel_offset */
2148
2149 /* Like ADDR64, but use local entry point of function. */
2150 HOWTO (R_PPC64_ADDR64_LOCAL, /* type */
2151 0, /* rightshift */
2152 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
2153 64, /* bitsize */
2154 FALSE, /* pc_relative */
2155 0, /* bitpos */
2156 complain_overflow_dont, /* complain_on_overflow */
2157 bfd_elf_generic_reloc, /* special_function */
2158 "R_PPC64_ADDR64_LOCAL", /* name */
2159 FALSE, /* partial_inplace */
2160 0, /* src_mask */
2161 ONES (64), /* dst_mask */
2162 FALSE), /* pcrel_offset */
2163
2164 /* GNU extension to record C++ vtable hierarchy. */
2165 HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
2166 0, /* rightshift */
2167 0, /* size (0 = byte, 1 = short, 2 = long) */
2168 0, /* bitsize */
2169 FALSE, /* pc_relative */
2170 0, /* bitpos */
2171 complain_overflow_dont, /* complain_on_overflow */
2172 NULL, /* special_function */
2173 "R_PPC64_GNU_VTINHERIT", /* name */
2174 FALSE, /* partial_inplace */
2175 0, /* src_mask */
2176 0, /* dst_mask */
2177 FALSE), /* pcrel_offset */
2178
2179 /* GNU extension to record C++ vtable member usage. */
2180 HOWTO (R_PPC64_GNU_VTENTRY, /* type */
2181 0, /* rightshift */
2182 0, /* size (0 = byte, 1 = short, 2 = long) */
2183 0, /* bitsize */
2184 FALSE, /* pc_relative */
2185 0, /* bitpos */
2186 complain_overflow_dont, /* complain_on_overflow */
2187 NULL, /* special_function */
2188 "R_PPC64_GNU_VTENTRY", /* name */
2189 FALSE, /* partial_inplace */
2190 0, /* src_mask */
2191 0, /* dst_mask */
2192 FALSE), /* pcrel_offset */
2193 };
2194
2195 \f
2196 /* Initialize the ppc64_elf_howto_table, so that linear accesses can
2197 be done. */
2198
2199 static void
2200 ppc_howto_init (void)
2201 {
2202 unsigned int i, type;
2203
2204 for (i = 0; i < ARRAY_SIZE (ppc64_elf_howto_raw); i++)
2205 {
2206 type = ppc64_elf_howto_raw[i].type;
2207 BFD_ASSERT (type < ARRAY_SIZE (ppc64_elf_howto_table));
2208 ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
2209 }
2210 }
2211
2212 static reloc_howto_type *
2213 ppc64_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2214 bfd_reloc_code_real_type code)
2215 {
2216 enum elf_ppc64_reloc_type r = R_PPC64_NONE;
2217
2218 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2219 /* Initialize howto table if needed. */
2220 ppc_howto_init ();
2221
2222 switch (code)
2223 {
2224 default:
2225 return NULL;
2226
2227 case BFD_RELOC_NONE: r = R_PPC64_NONE;
2228 break;
2229 case BFD_RELOC_32: r = R_PPC64_ADDR32;
2230 break;
2231 case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24;
2232 break;
2233 case BFD_RELOC_16: r = R_PPC64_ADDR16;
2234 break;
2235 case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO;
2236 break;
2237 case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI;
2238 break;
2239 case BFD_RELOC_PPC64_ADDR16_HIGH: r = R_PPC64_ADDR16_HIGH;
2240 break;
2241 case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA;
2242 break;
2243 case BFD_RELOC_PPC64_ADDR16_HIGHA: r = R_PPC64_ADDR16_HIGHA;
2244 break;
2245 case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14;
2246 break;
2247 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN;
2248 break;
2249 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN;
2250 break;
2251 case BFD_RELOC_PPC_B26: r = R_PPC64_REL24;
2252 break;
2253 case BFD_RELOC_PPC_B16: r = R_PPC64_REL14;
2254 break;
2255 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN;
2256 break;
2257 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN;
2258 break;
2259 case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16;
2260 break;
2261 case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO;
2262 break;
2263 case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI;
2264 break;
2265 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA;
2266 break;
2267 case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY;
2268 break;
2269 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT;
2270 break;
2271 case BFD_RELOC_32_PCREL: r = R_PPC64_REL32;
2272 break;
2273 case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32;
2274 break;
2275 case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32;
2276 break;
2277 case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO;
2278 break;
2279 case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI;
2280 break;
2281 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA;
2282 break;
2283 case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF;
2284 break;
2285 case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO;
2286 break;
2287 case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI;
2288 break;
2289 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA;
2290 break;
2291 case BFD_RELOC_CTOR: r = R_PPC64_ADDR64;
2292 break;
2293 case BFD_RELOC_64: r = R_PPC64_ADDR64;
2294 break;
2295 case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER;
2296 break;
2297 case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA;
2298 break;
2299 case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST;
2300 break;
2301 case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA;
2302 break;
2303 case BFD_RELOC_64_PCREL: r = R_PPC64_REL64;
2304 break;
2305 case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64;
2306 break;
2307 case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64;
2308 break;
2309 case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16;
2310 break;
2311 case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO;
2312 break;
2313 case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI;
2314 break;
2315 case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA;
2316 break;
2317 case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC;
2318 break;
2319 case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16;
2320 break;
2321 case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO;
2322 break;
2323 case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI;
2324 break;
2325 case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA;
2326 break;
2327 case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS;
2328 break;
2329 case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS;
2330 break;
2331 case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS;
2332 break;
2333 case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS;
2334 break;
2335 case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS;
2336 break;
2337 case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS;
2338 break;
2339 case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS;
2340 break;
2341 case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS;
2342 break;
2343 case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS;
2344 break;
2345 case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS;
2346 break;
2347 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS;
2348 break;
2349 case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS;
2350 break;
2351 case BFD_RELOC_PPC_TLSGD: r = R_PPC64_TLSGD;
2352 break;
2353 case BFD_RELOC_PPC_TLSLD: r = R_PPC64_TLSLD;
2354 break;
2355 case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64;
2356 break;
2357 case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16;
2358 break;
2359 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO;
2360 break;
2361 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI;
2362 break;
2363 case BFD_RELOC_PPC64_TPREL16_HIGH: r = R_PPC64_TPREL16_HIGH;
2364 break;
2365 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA;
2366 break;
2367 case BFD_RELOC_PPC64_TPREL16_HIGHA: r = R_PPC64_TPREL16_HIGHA;
2368 break;
2369 case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64;
2370 break;
2371 case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16;
2372 break;
2373 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO;
2374 break;
2375 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI;
2376 break;
2377 case BFD_RELOC_PPC64_DTPREL16_HIGH: r = R_PPC64_DTPREL16_HIGH;
2378 break;
2379 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA;
2380 break;
2381 case BFD_RELOC_PPC64_DTPREL16_HIGHA: r = R_PPC64_DTPREL16_HIGHA;
2382 break;
2383 case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64;
2384 break;
2385 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16;
2386 break;
2387 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO;
2388 break;
2389 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI;
2390 break;
2391 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA;
2392 break;
2393 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16;
2394 break;
2395 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO;
2396 break;
2397 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI;
2398 break;
2399 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA;
2400 break;
2401 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS;
2402 break;
2403 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS;
2404 break;
2405 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI;
2406 break;
2407 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA;
2408 break;
2409 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS;
2410 break;
2411 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS;
2412 break;
2413 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI;
2414 break;
2415 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA;
2416 break;
2417 case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS;
2418 break;
2419 case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS;
2420 break;
2421 case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER;
2422 break;
2423 case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA;
2424 break;
2425 case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST;
2426 break;
2427 case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA;
2428 break;
2429 case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS;
2430 break;
2431 case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS;
2432 break;
2433 case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER;
2434 break;
2435 case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA;
2436 break;
2437 case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST;
2438 break;
2439 case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA;
2440 break;
2441 case BFD_RELOC_16_PCREL: r = R_PPC64_REL16;
2442 break;
2443 case BFD_RELOC_LO16_PCREL: r = R_PPC64_REL16_LO;
2444 break;
2445 case BFD_RELOC_HI16_PCREL: r = R_PPC64_REL16_HI;
2446 break;
2447 case BFD_RELOC_HI16_S_PCREL: r = R_PPC64_REL16_HA;
2448 break;
2449 case BFD_RELOC_PPC_REL16DX_HA: r = R_PPC64_REL16DX_HA;
2450 break;
2451 case BFD_RELOC_PPC64_ENTRY: r = R_PPC64_ENTRY;
2452 break;
2453 case BFD_RELOC_PPC64_ADDR64_LOCAL: r = R_PPC64_ADDR64_LOCAL;
2454 break;
2455 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT;
2456 break;
2457 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY;
2458 break;
2459 }
2460
2461 return ppc64_elf_howto_table[r];
2462 };
2463
2464 static reloc_howto_type *
2465 ppc64_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2466 const char *r_name)
2467 {
2468 unsigned int i;
2469
2470 for (i = 0; i < ARRAY_SIZE (ppc64_elf_howto_raw); i++)
2471 if (ppc64_elf_howto_raw[i].name != NULL
2472 && strcasecmp (ppc64_elf_howto_raw[i].name, r_name) == 0)
2473 return &ppc64_elf_howto_raw[i];
2474
2475 return NULL;
2476 }
2477
2478 /* Set the howto pointer for a PowerPC ELF reloc. */
2479
2480 static void
2481 ppc64_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
2482 Elf_Internal_Rela *dst)
2483 {
2484 unsigned int type;
2485
2486 /* Initialize howto table if needed. */
2487 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2488 ppc_howto_init ();
2489
2490 type = ELF64_R_TYPE (dst->r_info);
2491 if (type >= ARRAY_SIZE (ppc64_elf_howto_table))
2492 {
2493 _bfd_error_handler (_("%B: invalid relocation type %d"),
2494 abfd, (int) type);
2495 type = R_PPC64_NONE;
2496 }
2497 cache_ptr->howto = ppc64_elf_howto_table[type];
2498 }
2499
2500 /* Handle the R_PPC64_ADDR16_HA and similar relocs. */
2501
2502 static bfd_reloc_status_type
2503 ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2504 void *data, asection *input_section,
2505 bfd *output_bfd, char **error_message)
2506 {
2507 enum elf_ppc64_reloc_type r_type;
2508 long insn;
2509 bfd_size_type octets;
2510 bfd_vma value;
2511
2512 /* If this is a relocatable link (output_bfd test tells us), just
2513 call the generic function. Any adjustment will be done at final
2514 link time. */
2515 if (output_bfd != NULL)
2516 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2517 input_section, output_bfd, error_message);
2518
2519 /* Adjust the addend for sign extension of the low 16 bits.
2520 We won't actually be using the low 16 bits, so trashing them
2521 doesn't matter. */
2522 reloc_entry->addend += 0x8000;
2523 r_type = reloc_entry->howto->type;
2524 if (r_type != R_PPC64_REL16DX_HA)
2525 return bfd_reloc_continue;
2526
2527 value = 0;
2528 if (!bfd_is_com_section (symbol->section))
2529 value = symbol->value;
2530 value += (reloc_entry->addend
2531 + symbol->section->output_offset
2532 + symbol->section->output_section->vma);
2533 value -= (reloc_entry->address
2534 + input_section->output_offset
2535 + input_section->output_section->vma);
2536 value = (bfd_signed_vma) value >> 16;
2537
2538 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2539 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2540 insn &= ~0x1fffc1;
2541 insn |= (value & 0xffc1) | ((value & 0x3e) << 15);
2542 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2543 if (value + 0x8000 > 0xffff)
2544 return bfd_reloc_overflow;
2545 return bfd_reloc_ok;
2546 }
2547
2548 static bfd_reloc_status_type
2549 ppc64_elf_branch_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2550 void *data, asection *input_section,
2551 bfd *output_bfd, char **error_message)
2552 {
2553 if (output_bfd != NULL)
2554 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2555 input_section, output_bfd, error_message);
2556
2557 if (strcmp (symbol->section->name, ".opd") == 0
2558 && (symbol->section->owner->flags & DYNAMIC) == 0)
2559 {
2560 bfd_vma dest = opd_entry_value (symbol->section,
2561 symbol->value + reloc_entry->addend,
2562 NULL, NULL, FALSE);
2563 if (dest != (bfd_vma) -1)
2564 reloc_entry->addend = dest - (symbol->value
2565 + symbol->section->output_section->vma
2566 + symbol->section->output_offset);
2567 }
2568 else
2569 {
2570 elf_symbol_type *elfsym = (elf_symbol_type *) symbol;
2571
2572 if (symbol->section->owner != abfd
2573 && symbol->section->owner != NULL
2574 && abiversion (symbol->section->owner) >= 2)
2575 {
2576 unsigned int i;
2577
2578 for (i = 0; i < symbol->section->owner->symcount; ++i)
2579 {
2580 asymbol *symdef = symbol->section->owner->outsymbols[i];
2581
2582 if (strcmp (symdef->name, symbol->name) == 0)
2583 {
2584 elfsym = (elf_symbol_type *) symdef;
2585 break;
2586 }
2587 }
2588 }
2589 reloc_entry->addend
2590 += PPC64_LOCAL_ENTRY_OFFSET (elfsym->internal_elf_sym.st_other);
2591 }
2592 return bfd_reloc_continue;
2593 }
2594
2595 static bfd_reloc_status_type
2596 ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2597 void *data, asection *input_section,
2598 bfd *output_bfd, char **error_message)
2599 {
2600 long insn;
2601 enum elf_ppc64_reloc_type r_type;
2602 bfd_size_type octets;
2603 /* Assume 'at' branch hints. */
2604 bfd_boolean is_isa_v2 = TRUE;
2605
2606 /* If this is a relocatable link (output_bfd test tells us), just
2607 call the generic function. Any adjustment will be done at final
2608 link time. */
2609 if (output_bfd != NULL)
2610 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2611 input_section, output_bfd, error_message);
2612
2613 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2614 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2615 insn &= ~(0x01 << 21);
2616 r_type = reloc_entry->howto->type;
2617 if (r_type == R_PPC64_ADDR14_BRTAKEN
2618 || r_type == R_PPC64_REL14_BRTAKEN)
2619 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
2620
2621 if (is_isa_v2)
2622 {
2623 /* Set 'a' bit. This is 0b00010 in BO field for branch
2624 on CR(BI) insns (BO == 001at or 011at), and 0b01000
2625 for branch on CTR insns (BO == 1a00t or 1a01t). */
2626 if ((insn & (0x14 << 21)) == (0x04 << 21))
2627 insn |= 0x02 << 21;
2628 else if ((insn & (0x14 << 21)) == (0x10 << 21))
2629 insn |= 0x08 << 21;
2630 else
2631 goto out;
2632 }
2633 else
2634 {
2635 bfd_vma target = 0;
2636 bfd_vma from;
2637
2638 if (!bfd_is_com_section (symbol->section))
2639 target = symbol->value;
2640 target += symbol->section->output_section->vma;
2641 target += symbol->section->output_offset;
2642 target += reloc_entry->addend;
2643
2644 from = (reloc_entry->address
2645 + input_section->output_offset
2646 + input_section->output_section->vma);
2647
2648 /* Invert 'y' bit if not the default. */
2649 if ((bfd_signed_vma) (target - from) < 0)
2650 insn ^= 0x01 << 21;
2651 }
2652 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2653 out:
2654 return ppc64_elf_branch_reloc (abfd, reloc_entry, symbol, data,
2655 input_section, output_bfd, error_message);
2656 }
2657
2658 static bfd_reloc_status_type
2659 ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2660 void *data, asection *input_section,
2661 bfd *output_bfd, char **error_message)
2662 {
2663 /* If this is a relocatable link (output_bfd test tells us), just
2664 call the generic function. Any adjustment will be done at final
2665 link time. */
2666 if (output_bfd != NULL)
2667 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2668 input_section, output_bfd, error_message);
2669
2670 /* Subtract the symbol section base address. */
2671 reloc_entry->addend -= symbol->section->output_section->vma;
2672 return bfd_reloc_continue;
2673 }
2674
2675 static bfd_reloc_status_type
2676 ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2677 void *data, asection *input_section,
2678 bfd *output_bfd, char **error_message)
2679 {
2680 /* If this is a relocatable link (output_bfd test tells us), just
2681 call the generic function. Any adjustment will be done at final
2682 link time. */
2683 if (output_bfd != NULL)
2684 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2685 input_section, output_bfd, error_message);
2686
2687 /* Subtract the symbol section base address. */
2688 reloc_entry->addend -= symbol->section->output_section->vma;
2689
2690 /* Adjust the addend for sign extension of the low 16 bits. */
2691 reloc_entry->addend += 0x8000;
2692 return bfd_reloc_continue;
2693 }
2694
2695 static bfd_reloc_status_type
2696 ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2697 void *data, asection *input_section,
2698 bfd *output_bfd, char **error_message)
2699 {
2700 bfd_vma TOCstart;
2701
2702 /* If this is a relocatable link (output_bfd test tells us), just
2703 call the generic function. Any adjustment will be done at final
2704 link time. */
2705 if (output_bfd != NULL)
2706 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2707 input_section, output_bfd, error_message);
2708
2709 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2710 if (TOCstart == 0)
2711 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2712
2713 /* Subtract the TOC base address. */
2714 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2715 return bfd_reloc_continue;
2716 }
2717
2718 static bfd_reloc_status_type
2719 ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2720 void *data, asection *input_section,
2721 bfd *output_bfd, char **error_message)
2722 {
2723 bfd_vma TOCstart;
2724
2725 /* If this is a relocatable link (output_bfd test tells us), just
2726 call the generic function. Any adjustment will be done at final
2727 link time. */
2728 if (output_bfd != NULL)
2729 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2730 input_section, output_bfd, error_message);
2731
2732 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2733 if (TOCstart == 0)
2734 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2735
2736 /* Subtract the TOC base address. */
2737 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2738
2739 /* Adjust the addend for sign extension of the low 16 bits. */
2740 reloc_entry->addend += 0x8000;
2741 return bfd_reloc_continue;
2742 }
2743
2744 static bfd_reloc_status_type
2745 ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2746 void *data, asection *input_section,
2747 bfd *output_bfd, char **error_message)
2748 {
2749 bfd_vma TOCstart;
2750 bfd_size_type octets;
2751
2752 /* If this is a relocatable link (output_bfd test tells us), just
2753 call the generic function. Any adjustment will be done at final
2754 link time. */
2755 if (output_bfd != NULL)
2756 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2757 input_section, output_bfd, error_message);
2758
2759 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2760 if (TOCstart == 0)
2761 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2762
2763 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2764 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
2765 return bfd_reloc_ok;
2766 }
2767
2768 static bfd_reloc_status_type
2769 ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2770 void *data, asection *input_section,
2771 bfd *output_bfd, char **error_message)
2772 {
2773 /* If this is a relocatable link (output_bfd test tells us), just
2774 call the generic function. Any adjustment will be done at final
2775 link time. */
2776 if (output_bfd != NULL)
2777 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2778 input_section, output_bfd, error_message);
2779
2780 if (error_message != NULL)
2781 {
2782 static char buf[60];
2783 sprintf (buf, "generic linker can't handle %s",
2784 reloc_entry->howto->name);
2785 *error_message = buf;
2786 }
2787 return bfd_reloc_dangerous;
2788 }
2789
2790 /* Track GOT entries needed for a given symbol. We might need more
2791 than one got entry per symbol. */
2792 struct got_entry
2793 {
2794 struct got_entry *next;
2795
2796 /* The symbol addend that we'll be placing in the GOT. */
2797 bfd_vma addend;
2798
2799 /* Unlike other ELF targets, we use separate GOT entries for the same
2800 symbol referenced from different input files. This is to support
2801 automatic multiple TOC/GOT sections, where the TOC base can vary
2802 from one input file to another. After partitioning into TOC groups
2803 we merge entries within the group.
2804
2805 Point to the BFD owning this GOT entry. */
2806 bfd *owner;
2807
2808 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
2809 TLS_TPREL or TLS_DTPREL for tls entries. */
2810 unsigned char tls_type;
2811
2812 /* Non-zero if got.ent points to real entry. */
2813 unsigned char is_indirect;
2814
2815 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
2816 union
2817 {
2818 bfd_signed_vma refcount;
2819 bfd_vma offset;
2820 struct got_entry *ent;
2821 } got;
2822 };
2823
2824 /* The same for PLT. */
2825 struct plt_entry
2826 {
2827 struct plt_entry *next;
2828
2829 bfd_vma addend;
2830
2831 union
2832 {
2833 bfd_signed_vma refcount;
2834 bfd_vma offset;
2835 } plt;
2836 };
2837
2838 struct ppc64_elf_obj_tdata
2839 {
2840 struct elf_obj_tdata elf;
2841
2842 /* Shortcuts to dynamic linker sections. */
2843 asection *got;
2844 asection *relgot;
2845
2846 /* Used during garbage collection. We attach global symbols defined
2847 on removed .opd entries to this section so that the sym is removed. */
2848 asection *deleted_section;
2849
2850 /* TLS local dynamic got entry handling. Support for multiple GOT
2851 sections means we potentially need one of these for each input bfd. */
2852 struct got_entry tlsld_got;
2853
2854 union {
2855 /* A copy of relocs before they are modified for --emit-relocs. */
2856 Elf_Internal_Rela *relocs;
2857
2858 /* Section contents. */
2859 bfd_byte *contents;
2860 } opd;
2861
2862 /* Nonzero if this bfd has small toc/got relocs, ie. that expect
2863 the reloc to be in the range -32768 to 32767. */
2864 unsigned int has_small_toc_reloc : 1;
2865
2866 /* Set if toc/got ha relocs detected not using r2, or lo reloc
2867 instruction not one we handle. */
2868 unsigned int unexpected_toc_insn : 1;
2869 };
2870
2871 #define ppc64_elf_tdata(bfd) \
2872 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
2873
2874 #define ppc64_tlsld_got(bfd) \
2875 (&ppc64_elf_tdata (bfd)->tlsld_got)
2876
2877 #define is_ppc64_elf(bfd) \
2878 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2879 && elf_object_id (bfd) == PPC64_ELF_DATA)
2880
2881 /* Override the generic function because we store some extras. */
2882
2883 static bfd_boolean
2884 ppc64_elf_mkobject (bfd *abfd)
2885 {
2886 return bfd_elf_allocate_object (abfd, sizeof (struct ppc64_elf_obj_tdata),
2887 PPC64_ELF_DATA);
2888 }
2889
2890 /* Fix bad default arch selected for a 64 bit input bfd when the
2891 default is 32 bit. Also select arch based on apuinfo. */
2892
2893 static bfd_boolean
2894 ppc64_elf_object_p (bfd *abfd)
2895 {
2896 if (!abfd->arch_info->the_default)
2897 return TRUE;
2898
2899 if (abfd->arch_info->bits_per_word == 32)
2900 {
2901 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2902
2903 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2904 {
2905 /* Relies on arch after 32 bit default being 64 bit default. */
2906 abfd->arch_info = abfd->arch_info->next;
2907 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2908 }
2909 }
2910 return _bfd_elf_ppc_set_arch (abfd);
2911 }
2912
2913 /* Support for core dump NOTE sections. */
2914
2915 static bfd_boolean
2916 ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2917 {
2918 size_t offset, size;
2919
2920 if (note->descsz != 504)
2921 return FALSE;
2922
2923 /* pr_cursig */
2924 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
2925
2926 /* pr_pid */
2927 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 32);
2928
2929 /* pr_reg */
2930 offset = 112;
2931 size = 384;
2932
2933 /* Make a ".reg/999" section. */
2934 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2935 size, note->descpos + offset);
2936 }
2937
2938 static bfd_boolean
2939 ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2940 {
2941 if (note->descsz != 136)
2942 return FALSE;
2943
2944 elf_tdata (abfd)->core->pid
2945 = bfd_get_32 (abfd, note->descdata + 24);
2946 elf_tdata (abfd)->core->program
2947 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
2948 elf_tdata (abfd)->core->command
2949 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
2950
2951 return TRUE;
2952 }
2953
2954 static char *
2955 ppc64_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type,
2956 ...)
2957 {
2958 switch (note_type)
2959 {
2960 default:
2961 return NULL;
2962
2963 case NT_PRPSINFO:
2964 {
2965 char data[136];
2966 va_list ap;
2967
2968 va_start (ap, note_type);
2969 memset (data, 0, sizeof (data));
2970 strncpy (data + 40, va_arg (ap, const char *), 16);
2971 strncpy (data + 56, va_arg (ap, const char *), 80);
2972 va_end (ap);
2973 return elfcore_write_note (abfd, buf, bufsiz,
2974 "CORE", note_type, data, sizeof (data));
2975 }
2976
2977 case NT_PRSTATUS:
2978 {
2979 char data[504];
2980 va_list ap;
2981 long pid;
2982 int cursig;
2983 const void *greg;
2984
2985 va_start (ap, note_type);
2986 memset (data, 0, 112);
2987 pid = va_arg (ap, long);
2988 bfd_put_32 (abfd, pid, data + 32);
2989 cursig = va_arg (ap, int);
2990 bfd_put_16 (abfd, cursig, data + 12);
2991 greg = va_arg (ap, const void *);
2992 memcpy (data + 112, greg, 384);
2993 memset (data + 496, 0, 8);
2994 va_end (ap);
2995 return elfcore_write_note (abfd, buf, bufsiz,
2996 "CORE", note_type, data, sizeof (data));
2997 }
2998 }
2999 }
3000
3001 /* Add extra PPC sections. */
3002
3003 static const struct bfd_elf_special_section ppc64_elf_special_sections[]=
3004 {
3005 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, 0 },
3006 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
3007 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
3008 { STRING_COMMA_LEN (".toc"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
3009 { STRING_COMMA_LEN (".toc1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
3010 { STRING_COMMA_LEN (".tocbss"), 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
3011 { NULL, 0, 0, 0, 0 }
3012 };
3013
3014 enum _ppc64_sec_type {
3015 sec_normal = 0,
3016 sec_opd = 1,
3017 sec_toc = 2
3018 };
3019
3020 struct _ppc64_elf_section_data
3021 {
3022 struct bfd_elf_section_data elf;
3023
3024 union
3025 {
3026 /* An array with one entry for each opd function descriptor,
3027 and some spares since opd entries may be either 16 or 24 bytes. */
3028 #define OPD_NDX(OFF) ((OFF) >> 4)
3029 struct _opd_sec_data
3030 {
3031 /* Points to the function code section for local opd entries. */
3032 asection **func_sec;
3033
3034 /* After editing .opd, adjust references to opd local syms. */
3035 long *adjust;
3036 } opd;
3037
3038 /* An array for toc sections, indexed by offset/8. */
3039 struct _toc_sec_data
3040 {
3041 /* Specifies the relocation symbol index used at a given toc offset. */
3042 unsigned *symndx;
3043
3044 /* And the relocation addend. */
3045 bfd_vma *add;
3046 } toc;
3047 } u;
3048
3049 enum _ppc64_sec_type sec_type:2;
3050
3051 /* Flag set when small branches are detected. Used to
3052 select suitable defaults for the stub group size. */
3053 unsigned int has_14bit_branch:1;
3054 };
3055
3056 #define ppc64_elf_section_data(sec) \
3057 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
3058
3059 static bfd_boolean
3060 ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
3061 {
3062 if (!sec->used_by_bfd)
3063 {
3064 struct _ppc64_elf_section_data *sdata;
3065 bfd_size_type amt = sizeof (*sdata);
3066
3067 sdata = bfd_zalloc (abfd, amt);
3068 if (sdata == NULL)
3069 return FALSE;
3070 sec->used_by_bfd = sdata;
3071 }
3072
3073 return _bfd_elf_new_section_hook (abfd, sec);
3074 }
3075
3076 static struct _opd_sec_data *
3077 get_opd_info (asection * sec)
3078 {
3079 if (sec != NULL
3080 && ppc64_elf_section_data (sec) != NULL
3081 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
3082 return &ppc64_elf_section_data (sec)->u.opd;
3083 return NULL;
3084 }
3085 \f
3086 /* Parameters for the qsort hook. */
3087 static bfd_boolean synthetic_relocatable;
3088 static asection *synthetic_opd;
3089
3090 /* qsort comparison function for ppc64_elf_get_synthetic_symtab. */
3091
3092 static int
3093 compare_symbols (const void *ap, const void *bp)
3094 {
3095 const asymbol *a = * (const asymbol **) ap;
3096 const asymbol *b = * (const asymbol **) bp;
3097
3098 /* Section symbols first. */
3099 if ((a->flags & BSF_SECTION_SYM) && !(b->flags & BSF_SECTION_SYM))
3100 return -1;
3101 if (!(a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM))
3102 return 1;
3103
3104 /* then .opd symbols. */
3105 if (synthetic_opd != NULL)
3106 {
3107 if (strcmp (a->section->name, ".opd") == 0
3108 && strcmp (b->section->name, ".opd") != 0)
3109 return -1;
3110 if (strcmp (a->section->name, ".opd") != 0
3111 && strcmp (b->section->name, ".opd") == 0)
3112 return 1;
3113 }
3114
3115 /* then other code symbols. */
3116 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3117 == (SEC_CODE | SEC_ALLOC)
3118 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3119 != (SEC_CODE | SEC_ALLOC))
3120 return -1;
3121
3122 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3123 != (SEC_CODE | SEC_ALLOC)
3124 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3125 == (SEC_CODE | SEC_ALLOC))
3126 return 1;
3127
3128 if (synthetic_relocatable)
3129 {
3130 if (a->section->id < b->section->id)
3131 return -1;
3132
3133 if (a->section->id > b->section->id)
3134 return 1;
3135 }
3136
3137 if (a->value + a->section->vma < b->value + b->section->vma)
3138 return -1;
3139
3140 if (a->value + a->section->vma > b->value + b->section->vma)
3141 return 1;
3142
3143 /* For syms with the same value, prefer strong dynamic global function
3144 syms over other syms. */
3145 if ((a->flags & BSF_GLOBAL) != 0 && (b->flags & BSF_GLOBAL) == 0)
3146 return -1;
3147
3148 if ((a->flags & BSF_GLOBAL) == 0 && (b->flags & BSF_GLOBAL) != 0)
3149 return 1;
3150
3151 if ((a->flags & BSF_FUNCTION) != 0 && (b->flags & BSF_FUNCTION) == 0)
3152 return -1;
3153
3154 if ((a->flags & BSF_FUNCTION) == 0 && (b->flags & BSF_FUNCTION) != 0)
3155 return 1;
3156
3157 if ((a->flags & BSF_WEAK) == 0 && (b->flags & BSF_WEAK) != 0)
3158 return -1;
3159
3160 if ((a->flags & BSF_WEAK) != 0 && (b->flags & BSF_WEAK) == 0)
3161 return 1;
3162
3163 if ((a->flags & BSF_DYNAMIC) != 0 && (b->flags & BSF_DYNAMIC) == 0)
3164 return -1;
3165
3166 if ((a->flags & BSF_DYNAMIC) == 0 && (b->flags & BSF_DYNAMIC) != 0)
3167 return 1;
3168
3169 return 0;
3170 }
3171
3172 /* Search SYMS for a symbol of the given VALUE. */
3173
3174 static asymbol *
3175 sym_exists_at (asymbol **syms, long lo, long hi, unsigned int id, bfd_vma value)
3176 {
3177 long mid;
3178
3179 if (id == (unsigned) -1)
3180 {
3181 while (lo < hi)
3182 {
3183 mid = (lo + hi) >> 1;
3184 if (syms[mid]->value + syms[mid]->section->vma < value)
3185 lo = mid + 1;
3186 else if (syms[mid]->value + syms[mid]->section->vma > value)
3187 hi = mid;
3188 else
3189 return syms[mid];
3190 }
3191 }
3192 else
3193 {
3194 while (lo < hi)
3195 {
3196 mid = (lo + hi) >> 1;
3197 if (syms[mid]->section->id < id)
3198 lo = mid + 1;
3199 else if (syms[mid]->section->id > id)
3200 hi = mid;
3201 else if (syms[mid]->value < value)
3202 lo = mid + 1;
3203 else if (syms[mid]->value > value)
3204 hi = mid;
3205 else
3206 return syms[mid];
3207 }
3208 }
3209 return NULL;
3210 }
3211
3212 static bfd_boolean
3213 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
3214 {
3215 bfd_vma vma = *(bfd_vma *) ptr;
3216 return ((section->flags & SEC_ALLOC) != 0
3217 && section->vma <= vma
3218 && vma < section->vma + section->size);
3219 }
3220
3221 /* Create synthetic symbols, effectively restoring "dot-symbol" function
3222 entry syms. Also generate @plt symbols for the glink branch table.
3223 Returns count of synthetic symbols in RET or -1 on error. */
3224
3225 static long
3226 ppc64_elf_get_synthetic_symtab (bfd *abfd,
3227 long static_count, asymbol **static_syms,
3228 long dyn_count, asymbol **dyn_syms,
3229 asymbol **ret)
3230 {
3231 asymbol *s;
3232 long i;
3233 long count;
3234 char *names;
3235 long symcount, codesecsym, codesecsymend, secsymend, opdsymend;
3236 asection *opd = NULL;
3237 bfd_boolean relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0;
3238 asymbol **syms;
3239 int abi = abiversion (abfd);
3240
3241 *ret = NULL;
3242
3243 if (abi < 2)
3244 {
3245 opd = bfd_get_section_by_name (abfd, ".opd");
3246 if (opd == NULL && abi == 1)
3247 return 0;
3248 }
3249
3250 symcount = static_count;
3251 if (!relocatable)
3252 symcount += dyn_count;
3253 if (symcount == 0)
3254 return 0;
3255
3256 syms = bfd_malloc ((symcount + 1) * sizeof (*syms));
3257 if (syms == NULL)
3258 return -1;
3259
3260 if (!relocatable && static_count != 0 && dyn_count != 0)
3261 {
3262 /* Use both symbol tables. */
3263 memcpy (syms, static_syms, static_count * sizeof (*syms));
3264 memcpy (syms + static_count, dyn_syms, (dyn_count + 1) * sizeof (*syms));
3265 }
3266 else if (!relocatable && static_count == 0)
3267 memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms));
3268 else
3269 memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms));
3270
3271 synthetic_relocatable = relocatable;
3272 synthetic_opd = opd;
3273 qsort (syms, symcount, sizeof (*syms), compare_symbols);
3274
3275 if (!relocatable && symcount > 1)
3276 {
3277 long j;
3278 /* Trim duplicate syms, since we may have merged the normal and
3279 dynamic symbols. Actually, we only care about syms that have
3280 different values, so trim any with the same value. */
3281 for (i = 1, j = 1; i < symcount; ++i)
3282 if (syms[i - 1]->value + syms[i - 1]->section->vma
3283 != syms[i]->value + syms[i]->section->vma)
3284 syms[j++] = syms[i];
3285 symcount = j;
3286 }
3287
3288 i = 0;
3289 /* Note that here and in compare_symbols we can't compare opd and
3290 sym->section directly. With separate debug info files, the
3291 symbols will be extracted from the debug file while abfd passed
3292 to this function is the real binary. */
3293 if (opd != NULL && strcmp (syms[i]->section->name, ".opd") == 0)
3294 ++i;
3295 codesecsym = i;
3296
3297 for (; i < symcount; ++i)
3298 if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3299 != (SEC_CODE | SEC_ALLOC))
3300 || (syms[i]->flags & BSF_SECTION_SYM) == 0)
3301 break;
3302 codesecsymend = i;
3303
3304 for (; i < symcount; ++i)
3305 if ((syms[i]->flags & BSF_SECTION_SYM) == 0)
3306 break;
3307 secsymend = i;
3308
3309 if (opd != NULL)
3310 for (; i < symcount; ++i)
3311 if (strcmp (syms[i]->section->name, ".opd") != 0)
3312 break;
3313 opdsymend = i;
3314
3315 for (; i < symcount; ++i)
3316 if ((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3317 != (SEC_CODE | SEC_ALLOC))
3318 break;
3319 symcount = i;
3320
3321 count = 0;
3322
3323 if (relocatable)
3324 {
3325 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3326 arelent *r;
3327 size_t size;
3328 long relcount;
3329
3330 if (opdsymend == secsymend)
3331 goto done;
3332
3333 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3334 relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0;
3335 if (relcount == 0)
3336 goto done;
3337
3338 if (!(*slurp_relocs) (abfd, opd, static_syms, FALSE))
3339 {
3340 count = -1;
3341 goto done;
3342 }
3343
3344 size = 0;
3345 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3346 {
3347 asymbol *sym;
3348
3349 while (r < opd->relocation + relcount
3350 && r->address < syms[i]->value + opd->vma)
3351 ++r;
3352
3353 if (r == opd->relocation + relcount)
3354 break;
3355
3356 if (r->address != syms[i]->value + opd->vma)
3357 continue;
3358
3359 if (r->howto->type != R_PPC64_ADDR64)
3360 continue;
3361
3362 sym = *r->sym_ptr_ptr;
3363 if (!sym_exists_at (syms, opdsymend, symcount,
3364 sym->section->id, sym->value + r->addend))
3365 {
3366 ++count;
3367 size += sizeof (asymbol);
3368 size += strlen (syms[i]->name) + 2;
3369 }
3370 }
3371
3372 if (size == 0)
3373 goto done;
3374 s = *ret = bfd_malloc (size);
3375 if (s == NULL)
3376 {
3377 count = -1;
3378 goto done;
3379 }
3380
3381 names = (char *) (s + count);
3382
3383 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3384 {
3385 asymbol *sym;
3386
3387 while (r < opd->relocation + relcount
3388 && r->address < syms[i]->value + opd->vma)
3389 ++r;
3390
3391 if (r == opd->relocation + relcount)
3392 break;
3393
3394 if (r->address != syms[i]->value + opd->vma)
3395 continue;
3396
3397 if (r->howto->type != R_PPC64_ADDR64)
3398 continue;
3399
3400 sym = *r->sym_ptr_ptr;
3401 if (!sym_exists_at (syms, opdsymend, symcount,
3402 sym->section->id, sym->value + r->addend))
3403 {
3404 size_t len;
3405
3406 *s = *syms[i];
3407 s->flags |= BSF_SYNTHETIC;
3408 s->section = sym->section;
3409 s->value = sym->value + r->addend;
3410 s->name = names;
3411 *names++ = '.';
3412 len = strlen (syms[i]->name);
3413 memcpy (names, syms[i]->name, len + 1);
3414 names += len + 1;
3415 /* Have udata.p point back to the original symbol this
3416 synthetic symbol was derived from. */
3417 s->udata.p = syms[i];
3418 s++;
3419 }
3420 }
3421 }
3422 else
3423 {
3424 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3425 bfd_byte *contents = NULL;
3426 size_t size;
3427 long plt_count = 0;
3428 bfd_vma glink_vma = 0, resolv_vma = 0;
3429 asection *dynamic, *glink = NULL, *relplt = NULL;
3430 arelent *p;
3431
3432 if (opd != NULL && !bfd_malloc_and_get_section (abfd, opd, &contents))
3433 {
3434 free_contents_and_exit_err:
3435 count = -1;
3436 free_contents_and_exit:
3437 if (contents)
3438 free (contents);
3439 goto done;
3440 }
3441
3442 size = 0;
3443 for (i = secsymend; i < opdsymend; ++i)
3444 {
3445 bfd_vma ent;
3446
3447 /* Ignore bogus symbols. */
3448 if (syms[i]->value > opd->size - 8)
3449 continue;
3450
3451 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3452 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3453 {
3454 ++count;
3455 size += sizeof (asymbol);
3456 size += strlen (syms[i]->name) + 2;
3457 }
3458 }
3459
3460 /* Get start of .glink stubs from DT_PPC64_GLINK. */
3461 if (dyn_count != 0
3462 && (dynamic = bfd_get_section_by_name (abfd, ".dynamic")) != NULL)
3463 {
3464 bfd_byte *dynbuf, *extdyn, *extdynend;
3465 size_t extdynsize;
3466 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
3467
3468 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
3469 goto free_contents_and_exit_err;
3470
3471 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
3472 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
3473
3474 extdyn = dynbuf;
3475 extdynend = extdyn + dynamic->size;
3476 for (; extdyn < extdynend; extdyn += extdynsize)
3477 {
3478 Elf_Internal_Dyn dyn;
3479 (*swap_dyn_in) (abfd, extdyn, &dyn);
3480
3481 if (dyn.d_tag == DT_NULL)
3482 break;
3483
3484 if (dyn.d_tag == DT_PPC64_GLINK)
3485 {
3486 /* The first glink stub starts at offset 32; see
3487 comment in ppc64_elf_finish_dynamic_sections. */
3488 glink_vma = dyn.d_un.d_val + GLINK_CALL_STUB_SIZE - 8 * 4;
3489 /* The .glink section usually does not survive the final
3490 link; search for the section (usually .text) where the
3491 glink stubs now reside. */
3492 glink = bfd_sections_find_if (abfd, section_covers_vma,
3493 &glink_vma);
3494 break;
3495 }
3496 }
3497
3498 free (dynbuf);
3499 }
3500
3501 if (glink != NULL)
3502 {
3503 /* Determine __glink trampoline by reading the relative branch
3504 from the first glink stub. */
3505 bfd_byte buf[4];
3506 unsigned int off = 0;
3507
3508 while (bfd_get_section_contents (abfd, glink, buf,
3509 glink_vma + off - glink->vma, 4))
3510 {
3511 unsigned int insn = bfd_get_32 (abfd, buf);
3512 insn ^= B_DOT;
3513 if ((insn & ~0x3fffffc) == 0)
3514 {
3515 resolv_vma = glink_vma + off + (insn ^ 0x2000000) - 0x2000000;
3516 break;
3517 }
3518 off += 4;
3519 if (off > 4)
3520 break;
3521 }
3522
3523 if (resolv_vma)
3524 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
3525
3526 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
3527 if (relplt != NULL)
3528 {
3529 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3530 if (! (*slurp_relocs) (abfd, relplt, dyn_syms, TRUE))
3531 goto free_contents_and_exit_err;
3532
3533 plt_count = relplt->size / sizeof (Elf64_External_Rela);
3534 size += plt_count * sizeof (asymbol);
3535
3536 p = relplt->relocation;
3537 for (i = 0; i < plt_count; i++, p++)
3538 {
3539 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
3540 if (p->addend != 0)
3541 size += sizeof ("+0x") - 1 + 16;
3542 }
3543 }
3544 }
3545
3546 if (size == 0)
3547 goto free_contents_and_exit;
3548 s = *ret = bfd_malloc (size);
3549 if (s == NULL)
3550 goto free_contents_and_exit_err;
3551
3552 names = (char *) (s + count + plt_count + (resolv_vma != 0));
3553
3554 for (i = secsymend; i < opdsymend; ++i)
3555 {
3556 bfd_vma ent;
3557
3558 if (syms[i]->value > opd->size - 8)
3559 continue;
3560
3561 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3562 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3563 {
3564 long lo, hi;
3565 size_t len;
3566 asection *sec = abfd->sections;
3567
3568 *s = *syms[i];
3569 lo = codesecsym;
3570 hi = codesecsymend;
3571 while (lo < hi)
3572 {
3573 long mid = (lo + hi) >> 1;
3574 if (syms[mid]->section->vma < ent)
3575 lo = mid + 1;
3576 else if (syms[mid]->section->vma > ent)
3577 hi = mid;
3578 else
3579 {
3580 sec = syms[mid]->section;
3581 break;
3582 }
3583 }
3584
3585 if (lo >= hi && lo > codesecsym)
3586 sec = syms[lo - 1]->section;
3587
3588 for (; sec != NULL; sec = sec->next)
3589 {
3590 if (sec->vma > ent)
3591 break;
3592 /* SEC_LOAD may not be set if SEC is from a separate debug
3593 info file. */
3594 if ((sec->flags & SEC_ALLOC) == 0)
3595 break;
3596 if ((sec->flags & SEC_CODE) != 0)
3597 s->section = sec;
3598 }
3599 s->flags |= BSF_SYNTHETIC;
3600 s->value = ent - s->section->vma;
3601 s->name = names;
3602 *names++ = '.';
3603 len = strlen (syms[i]->name);
3604 memcpy (names, syms[i]->name, len + 1);
3605 names += len + 1;
3606 /* Have udata.p point back to the original symbol this
3607 synthetic symbol was derived from. */
3608 s->udata.p = syms[i];
3609 s++;
3610 }
3611 }
3612 free (contents);
3613
3614 if (glink != NULL && relplt != NULL)
3615 {
3616 if (resolv_vma)
3617 {
3618 /* Add a symbol for the main glink trampoline. */
3619 memset (s, 0, sizeof *s);
3620 s->the_bfd = abfd;
3621 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3622 s->section = glink;
3623 s->value = resolv_vma - glink->vma;
3624 s->name = names;
3625 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3626 names += sizeof ("__glink_PLTresolve");
3627 s++;
3628 count++;
3629 }
3630
3631 /* FIXME: It would be very much nicer to put sym@plt on the
3632 stub rather than on the glink branch table entry. The
3633 objdump disassembler would then use a sensible symbol
3634 name on plt calls. The difficulty in doing so is
3635 a) finding the stubs, and,
3636 b) matching stubs against plt entries, and,
3637 c) there can be multiple stubs for a given plt entry.
3638
3639 Solving (a) could be done by code scanning, but older
3640 ppc64 binaries used different stubs to current code.
3641 (b) is the tricky one since you need to known the toc
3642 pointer for at least one function that uses a pic stub to
3643 be able to calculate the plt address referenced.
3644 (c) means gdb would need to set multiple breakpoints (or
3645 find the glink branch itself) when setting breakpoints
3646 for pending shared library loads. */
3647 p = relplt->relocation;
3648 for (i = 0; i < plt_count; i++, p++)
3649 {
3650 size_t len;
3651
3652 *s = **p->sym_ptr_ptr;
3653 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
3654 we are defining a symbol, ensure one of them is set. */
3655 if ((s->flags & BSF_LOCAL) == 0)
3656 s->flags |= BSF_GLOBAL;
3657 s->flags |= BSF_SYNTHETIC;
3658 s->section = glink;
3659 s->value = glink_vma - glink->vma;
3660 s->name = names;
3661 s->udata.p = NULL;
3662 len = strlen ((*p->sym_ptr_ptr)->name);
3663 memcpy (names, (*p->sym_ptr_ptr)->name, len);
3664 names += len;
3665 if (p->addend != 0)
3666 {
3667 memcpy (names, "+0x", sizeof ("+0x") - 1);
3668 names += sizeof ("+0x") - 1;
3669 bfd_sprintf_vma (abfd, names, p->addend);
3670 names += strlen (names);
3671 }
3672 memcpy (names, "@plt", sizeof ("@plt"));
3673 names += sizeof ("@plt");
3674 s++;
3675 if (abi < 2)
3676 {
3677 glink_vma += 8;
3678 if (i >= 0x8000)
3679 glink_vma += 4;
3680 }
3681 else
3682 glink_vma += 4;
3683 }
3684 count += plt_count;
3685 }
3686 }
3687
3688 done:
3689 free (syms);
3690 return count;
3691 }
3692 \f
3693 /* The following functions are specific to the ELF linker, while
3694 functions above are used generally. Those named ppc64_elf_* are
3695 called by the main ELF linker code. They appear in this file more
3696 or less in the order in which they are called. eg.
3697 ppc64_elf_check_relocs is called early in the link process,
3698 ppc64_elf_finish_dynamic_sections is one of the last functions
3699 called.
3700
3701 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
3702 functions have both a function code symbol and a function descriptor
3703 symbol. A call to foo in a relocatable object file looks like:
3704
3705 . .text
3706 . x:
3707 . bl .foo
3708 . nop
3709
3710 The function definition in another object file might be:
3711
3712 . .section .opd
3713 . foo: .quad .foo
3714 . .quad .TOC.@tocbase
3715 . .quad 0
3716 .
3717 . .text
3718 . .foo: blr
3719
3720 When the linker resolves the call during a static link, the branch
3721 unsurprisingly just goes to .foo and the .opd information is unused.
3722 If the function definition is in a shared library, things are a little
3723 different: The call goes via a plt call stub, the opd information gets
3724 copied to the plt, and the linker patches the nop.
3725
3726 . x:
3727 . bl .foo_stub
3728 . ld 2,40(1)
3729 .
3730 .
3731 . .foo_stub:
3732 . std 2,40(1) # in practice, the call stub
3733 . addis 11,2,Lfoo@toc@ha # is slightly optimized, but
3734 . addi 11,11,Lfoo@toc@l # this is the general idea
3735 . ld 12,0(11)
3736 . ld 2,8(11)
3737 . mtctr 12
3738 . ld 11,16(11)
3739 . bctr
3740 .
3741 . .section .plt
3742 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
3743
3744 The "reloc ()" notation is supposed to indicate that the linker emits
3745 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
3746 copying.
3747
3748 What are the difficulties here? Well, firstly, the relocations
3749 examined by the linker in check_relocs are against the function code
3750 sym .foo, while the dynamic relocation in the plt is emitted against
3751 the function descriptor symbol, foo. Somewhere along the line, we need
3752 to carefully copy dynamic link information from one symbol to the other.
3753 Secondly, the generic part of the elf linker will make .foo a dynamic
3754 symbol as is normal for most other backends. We need foo dynamic
3755 instead, at least for an application final link. However, when
3756 creating a shared library containing foo, we need to have both symbols
3757 dynamic so that references to .foo are satisfied during the early
3758 stages of linking. Otherwise the linker might decide to pull in a
3759 definition from some other object, eg. a static library.
3760
3761 Update: As of August 2004, we support a new convention. Function
3762 calls may use the function descriptor symbol, ie. "bl foo". This
3763 behaves exactly as "bl .foo". */
3764
3765 /* Of those relocs that might be copied as dynamic relocs, this function
3766 selects those that must be copied when linking a shared library,
3767 even when the symbol is local. */
3768
3769 static int
3770 must_be_dyn_reloc (struct bfd_link_info *info,
3771 enum elf_ppc64_reloc_type r_type)
3772 {
3773 switch (r_type)
3774 {
3775 default:
3776 return 1;
3777
3778 case R_PPC64_REL32:
3779 case R_PPC64_REL64:
3780 case R_PPC64_REL30:
3781 return 0;
3782
3783 case R_PPC64_TPREL16:
3784 case R_PPC64_TPREL16_LO:
3785 case R_PPC64_TPREL16_HI:
3786 case R_PPC64_TPREL16_HA:
3787 case R_PPC64_TPREL16_DS:
3788 case R_PPC64_TPREL16_LO_DS:
3789 case R_PPC64_TPREL16_HIGH:
3790 case R_PPC64_TPREL16_HIGHA:
3791 case R_PPC64_TPREL16_HIGHER:
3792 case R_PPC64_TPREL16_HIGHERA:
3793 case R_PPC64_TPREL16_HIGHEST:
3794 case R_PPC64_TPREL16_HIGHESTA:
3795 case R_PPC64_TPREL64:
3796 return !bfd_link_executable (info);
3797 }
3798 }
3799
3800 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3801 copying dynamic variables from a shared lib into an app's dynbss
3802 section, and instead use a dynamic relocation to point into the
3803 shared lib. With code that gcc generates, it's vital that this be
3804 enabled; In the PowerPC64 ABI, the address of a function is actually
3805 the address of a function descriptor, which resides in the .opd
3806 section. gcc uses the descriptor directly rather than going via the
3807 GOT as some other ABI's do, which means that initialized function
3808 pointers must reference the descriptor. Thus, a function pointer
3809 initialized to the address of a function in a shared library will
3810 either require a copy reloc, or a dynamic reloc. Using a copy reloc
3811 redefines the function descriptor symbol to point to the copy. This
3812 presents a problem as a plt entry for that function is also
3813 initialized from the function descriptor symbol and the copy reloc
3814 may not be initialized first. */
3815 #define ELIMINATE_COPY_RELOCS 1
3816
3817 /* Section name for stubs is the associated section name plus this
3818 string. */
3819 #define STUB_SUFFIX ".stub"
3820
3821 /* Linker stubs.
3822 ppc_stub_long_branch:
3823 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
3824 destination, but a 24 bit branch in a stub section will reach.
3825 . b dest
3826
3827 ppc_stub_plt_branch:
3828 Similar to the above, but a 24 bit branch in the stub section won't
3829 reach its destination.
3830 . addis %r11,%r2,xxx@toc@ha
3831 . ld %r12,xxx@toc@l(%r11)
3832 . mtctr %r12
3833 . bctr
3834
3835 ppc_stub_plt_call:
3836 Used to call a function in a shared library. If it so happens that
3837 the plt entry referenced crosses a 64k boundary, then an extra
3838 "addi %r11,%r11,xxx@toc@l" will be inserted before the "mtctr".
3839 . std %r2,40(%r1)
3840 . addis %r11,%r2,xxx@toc@ha
3841 . ld %r12,xxx+0@toc@l(%r11)
3842 . mtctr %r12
3843 . ld %r2,xxx+8@toc@l(%r11)
3844 . ld %r11,xxx+16@toc@l(%r11)
3845 . bctr
3846
3847 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
3848 code to adjust the value and save r2 to support multiple toc sections.
3849 A ppc_stub_long_branch with an r2 offset looks like:
3850 . std %r2,40(%r1)
3851 . addis %r2,%r2,off@ha
3852 . addi %r2,%r2,off@l
3853 . b dest
3854
3855 A ppc_stub_plt_branch with an r2 offset looks like:
3856 . std %r2,40(%r1)
3857 . addis %r11,%r2,xxx@toc@ha
3858 . ld %r12,xxx@toc@l(%r11)
3859 . addis %r2,%r2,off@ha
3860 . addi %r2,%r2,off@l
3861 . mtctr %r12
3862 . bctr
3863
3864 In cases where the "addis" instruction would add zero, the "addis" is
3865 omitted and following instructions modified slightly in some cases.
3866 */
3867
3868 enum ppc_stub_type {
3869 ppc_stub_none,
3870 ppc_stub_long_branch,
3871 ppc_stub_long_branch_r2off,
3872 ppc_stub_plt_branch,
3873 ppc_stub_plt_branch_r2off,
3874 ppc_stub_plt_call,
3875 ppc_stub_plt_call_r2save,
3876 ppc_stub_global_entry,
3877 ppc_stub_save_res
3878 };
3879
3880 /* Information on stub grouping. */
3881 struct map_stub
3882 {
3883 /* The stub section. */
3884 asection *stub_sec;
3885 /* This is the section to which stubs in the group will be attached. */
3886 asection *link_sec;
3887 /* Next group. */
3888 struct map_stub *next;
3889 /* Whether to emit a copy of register save/restore functions in this
3890 group. */
3891 int needs_save_res;
3892 };
3893
3894 struct ppc_stub_hash_entry {
3895
3896 /* Base hash table entry structure. */
3897 struct bfd_hash_entry root;
3898
3899 enum ppc_stub_type stub_type;
3900
3901 /* Group information. */
3902 struct map_stub *group;
3903
3904 /* Offset within stub_sec of the beginning of this stub. */
3905 bfd_vma stub_offset;
3906
3907 /* Given the symbol's value and its section we can determine its final
3908 value when building the stubs (so the stub knows where to jump. */
3909 bfd_vma target_value;
3910 asection *target_section;
3911
3912 /* The symbol table entry, if any, that this was derived from. */
3913 struct ppc_link_hash_entry *h;
3914 struct plt_entry *plt_ent;
3915
3916 /* Symbol st_other. */
3917 unsigned char other;
3918 };
3919
3920 struct ppc_branch_hash_entry {
3921
3922 /* Base hash table entry structure. */
3923 struct bfd_hash_entry root;
3924
3925 /* Offset within branch lookup table. */
3926 unsigned int offset;
3927
3928 /* Generation marker. */
3929 unsigned int iter;
3930 };
3931
3932 /* Used to track dynamic relocations for local symbols. */
3933 struct ppc_dyn_relocs
3934 {
3935 struct ppc_dyn_relocs *next;
3936
3937 /* The input section of the reloc. */
3938 asection *sec;
3939
3940 /* Total number of relocs copied for the input section. */
3941 unsigned int count : 31;
3942
3943 /* Whether this entry is for STT_GNU_IFUNC symbols. */
3944 unsigned int ifunc : 1;
3945 };
3946
3947 struct ppc_link_hash_entry
3948 {
3949 struct elf_link_hash_entry elf;
3950
3951 union {
3952 /* A pointer to the most recently used stub hash entry against this
3953 symbol. */
3954 struct ppc_stub_hash_entry *stub_cache;
3955
3956 /* A pointer to the next symbol starting with a '.' */
3957 struct ppc_link_hash_entry *next_dot_sym;
3958 } u;
3959
3960 /* Track dynamic relocs copied for this symbol. */
3961 struct elf_dyn_relocs *dyn_relocs;
3962
3963 /* Chain of aliases referring to a weakdef. */
3964 struct ppc_link_hash_entry *weakref;
3965
3966 /* Link between function code and descriptor symbols. */
3967 struct ppc_link_hash_entry *oh;
3968
3969 /* Flag function code and descriptor symbols. */
3970 unsigned int is_func:1;
3971 unsigned int is_func_descriptor:1;
3972 unsigned int fake:1;
3973
3974 /* Whether global opd/toc sym has been adjusted or not.
3975 After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
3976 should be set for all globals defined in any opd/toc section. */
3977 unsigned int adjust_done:1;
3978
3979 /* Set if we twiddled this symbol to weak at some stage. */
3980 unsigned int was_undefined:1;
3981
3982 /* Set if this is an out-of-line register save/restore function,
3983 with non-standard calling convention. */
3984 unsigned int save_res:1;
3985
3986 /* Contexts in which symbol is used in the GOT (or TOC).
3987 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
3988 corresponding relocs are encountered during check_relocs.
3989 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3990 indicate the corresponding GOT entry type is not needed.
3991 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
3992 a TPREL one. We use a separate flag rather than setting TPREL
3993 just for convenience in distinguishing the two cases. */
3994 #define TLS_GD 1 /* GD reloc. */
3995 #define TLS_LD 2 /* LD reloc. */
3996 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3997 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3998 #define TLS_TLS 16 /* Any TLS reloc. */
3999 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
4000 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
4001 #define PLT_IFUNC 128 /* STT_GNU_IFUNC. */
4002 unsigned char tls_mask;
4003 };
4004
4005 /* ppc64 ELF linker hash table. */
4006
4007 struct ppc_link_hash_table
4008 {
4009 struct elf_link_hash_table elf;
4010
4011 /* The stub hash table. */
4012 struct bfd_hash_table stub_hash_table;
4013
4014 /* Another hash table for plt_branch stubs. */
4015 struct bfd_hash_table branch_hash_table;
4016
4017 /* Hash table for function prologue tocsave. */
4018 htab_t tocsave_htab;
4019
4020 /* Various options and other info passed from the linker. */
4021 struct ppc64_elf_params *params;
4022
4023 /* The size of sec_info below. */
4024 unsigned int sec_info_arr_size;
4025
4026 /* Per-section array of extra section info. Done this way rather
4027 than as part of ppc64_elf_section_data so we have the info for
4028 non-ppc64 sections. */
4029 struct
4030 {
4031 /* Along with elf_gp, specifies the TOC pointer used by this section. */
4032 bfd_vma toc_off;
4033
4034 union
4035 {
4036 /* The section group that this section belongs to. */
4037 struct map_stub *group;
4038 /* A temp section list pointer. */
4039 asection *list;
4040 } u;
4041 } *sec_info;
4042
4043 /* Linked list of groups. */
4044 struct map_stub *group;
4045
4046 /* Temp used when calculating TOC pointers. */
4047 bfd_vma toc_curr;
4048 bfd *toc_bfd;
4049 asection *toc_first_sec;
4050
4051 /* Used when adding symbols. */
4052 struct ppc_link_hash_entry *dot_syms;
4053
4054 /* Shortcuts to get to dynamic linker sections. */
4055 asection *dynbss;
4056 asection *relbss;
4057 asection *glink;
4058 asection *sfpr;
4059 asection *brlt;
4060 asection *relbrlt;
4061 asection *glink_eh_frame;
4062
4063 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
4064 struct ppc_link_hash_entry *tls_get_addr;
4065 struct ppc_link_hash_entry *tls_get_addr_fd;
4066
4067 /* The size of reliplt used by got entry relocs. */
4068 bfd_size_type got_reli_size;
4069
4070 /* Statistics. */
4071 unsigned long stub_count[ppc_stub_global_entry];
4072
4073 /* Number of stubs against global syms. */
4074 unsigned long stub_globals;
4075
4076 /* Set if we're linking code with function descriptors. */
4077 unsigned int opd_abi:1;
4078
4079 /* Support for multiple toc sections. */
4080 unsigned int do_multi_toc:1;
4081 unsigned int multi_toc_needed:1;
4082 unsigned int second_toc_pass:1;
4083 unsigned int do_toc_opt:1;
4084
4085 /* Set on error. */
4086 unsigned int stub_error:1;
4087
4088 /* Temp used by ppc64_elf_before_check_relocs. */
4089 unsigned int twiddled_syms:1;
4090
4091 /* Incremented every time we size stubs. */
4092 unsigned int stub_iteration;
4093
4094 /* Small local sym cache. */
4095 struct sym_cache sym_cache;
4096 };
4097
4098 /* Rename some of the generic section flags to better document how they
4099 are used here. */
4100
4101 /* Nonzero if this section has TLS related relocations. */
4102 #define has_tls_reloc sec_flg0
4103
4104 /* Nonzero if this section has a call to __tls_get_addr. */
4105 #define has_tls_get_addr_call sec_flg1
4106
4107 /* Nonzero if this section has any toc or got relocs. */
4108 #define has_toc_reloc sec_flg2
4109
4110 /* Nonzero if this section has a call to another section that uses
4111 the toc or got. */
4112 #define makes_toc_func_call sec_flg3
4113
4114 /* Recursion protection when determining above flag. */
4115 #define call_check_in_progress sec_flg4
4116 #define call_check_done sec_flg5
4117
4118 /* Get the ppc64 ELF linker hash table from a link_info structure. */
4119
4120 #define ppc_hash_table(p) \
4121 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
4122 == PPC64_ELF_DATA ? ((struct ppc_link_hash_table *) ((p)->hash)) : NULL)
4123
4124 #define ppc_stub_hash_lookup(table, string, create, copy) \
4125 ((struct ppc_stub_hash_entry *) \
4126 bfd_hash_lookup ((table), (string), (create), (copy)))
4127
4128 #define ppc_branch_hash_lookup(table, string, create, copy) \
4129 ((struct ppc_branch_hash_entry *) \
4130 bfd_hash_lookup ((table), (string), (create), (copy)))
4131
4132 /* Create an entry in the stub hash table. */
4133
4134 static struct bfd_hash_entry *
4135 stub_hash_newfunc (struct bfd_hash_entry *entry,
4136 struct bfd_hash_table *table,
4137 const char *string)
4138 {
4139 /* Allocate the structure if it has not already been allocated by a
4140 subclass. */
4141 if (entry == NULL)
4142 {
4143 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
4144 if (entry == NULL)
4145 return entry;
4146 }
4147
4148 /* Call the allocation method of the superclass. */
4149 entry = bfd_hash_newfunc (entry, table, string);
4150 if (entry != NULL)
4151 {
4152 struct ppc_stub_hash_entry *eh;
4153
4154 /* Initialize the local fields. */
4155 eh = (struct ppc_stub_hash_entry *) entry;
4156 eh->stub_type = ppc_stub_none;
4157 eh->group = NULL;
4158 eh->stub_offset = 0;
4159 eh->target_value = 0;
4160 eh->target_section = NULL;
4161 eh->h = NULL;
4162 eh->plt_ent = NULL;
4163 eh->other = 0;
4164 }
4165
4166 return entry;
4167 }
4168
4169 /* Create an entry in the branch hash table. */
4170
4171 static struct bfd_hash_entry *
4172 branch_hash_newfunc (struct bfd_hash_entry *entry,
4173 struct bfd_hash_table *table,
4174 const char *string)
4175 {
4176 /* Allocate the structure if it has not already been allocated by a
4177 subclass. */
4178 if (entry == NULL)
4179 {
4180 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
4181 if (entry == NULL)
4182 return entry;
4183 }
4184
4185 /* Call the allocation method of the superclass. */
4186 entry = bfd_hash_newfunc (entry, table, string);
4187 if (entry != NULL)
4188 {
4189 struct ppc_branch_hash_entry *eh;
4190
4191 /* Initialize the local fields. */
4192 eh = (struct ppc_branch_hash_entry *) entry;
4193 eh->offset = 0;
4194 eh->iter = 0;
4195 }
4196
4197 return entry;
4198 }
4199
4200 /* Create an entry in a ppc64 ELF linker hash table. */
4201
4202 static struct bfd_hash_entry *
4203 link_hash_newfunc (struct bfd_hash_entry *entry,
4204 struct bfd_hash_table *table,
4205 const char *string)
4206 {
4207 /* Allocate the structure if it has not already been allocated by a
4208 subclass. */
4209 if (entry == NULL)
4210 {
4211 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
4212 if (entry == NULL)
4213 return entry;
4214 }
4215
4216 /* Call the allocation method of the superclass. */
4217 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
4218 if (entry != NULL)
4219 {
4220 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
4221
4222 memset (&eh->u.stub_cache, 0,
4223 (sizeof (struct ppc_link_hash_entry)
4224 - offsetof (struct ppc_link_hash_entry, u.stub_cache)));
4225
4226 /* When making function calls, old ABI code references function entry
4227 points (dot symbols), while new ABI code references the function
4228 descriptor symbol. We need to make any combination of reference and
4229 definition work together, without breaking archive linking.
4230
4231 For a defined function "foo" and an undefined call to "bar":
4232 An old object defines "foo" and ".foo", references ".bar" (possibly
4233 "bar" too).
4234 A new object defines "foo" and references "bar".
4235
4236 A new object thus has no problem with its undefined symbols being
4237 satisfied by definitions in an old object. On the other hand, the
4238 old object won't have ".bar" satisfied by a new object.
4239
4240 Keep a list of newly added dot-symbols. */
4241
4242 if (string[0] == '.')
4243 {
4244 struct ppc_link_hash_table *htab;
4245
4246 htab = (struct ppc_link_hash_table *) table;
4247 eh->u.next_dot_sym = htab->dot_syms;
4248 htab->dot_syms = eh;
4249 }
4250 }
4251
4252 return entry;
4253 }
4254
4255 struct tocsave_entry {
4256 asection *sec;
4257 bfd_vma offset;
4258 };
4259
4260 static hashval_t
4261 tocsave_htab_hash (const void *p)
4262 {
4263 const struct tocsave_entry *e = (const struct tocsave_entry *) p;
4264 return ((bfd_vma)(intptr_t) e->sec ^ e->offset) >> 3;
4265 }
4266
4267 static int
4268 tocsave_htab_eq (const void *p1, const void *p2)
4269 {
4270 const struct tocsave_entry *e1 = (const struct tocsave_entry *) p1;
4271 const struct tocsave_entry *e2 = (const struct tocsave_entry *) p2;
4272 return e1->sec == e2->sec && e1->offset == e2->offset;
4273 }
4274
4275 /* Destroy a ppc64 ELF linker hash table. */
4276
4277 static void
4278 ppc64_elf_link_hash_table_free (bfd *obfd)
4279 {
4280 struct ppc_link_hash_table *htab;
4281
4282 htab = (struct ppc_link_hash_table *) obfd->link.hash;
4283 if (htab->tocsave_htab)
4284 htab_delete (htab->tocsave_htab);
4285 bfd_hash_table_free (&htab->branch_hash_table);
4286 bfd_hash_table_free (&htab->stub_hash_table);
4287 _bfd_elf_link_hash_table_free (obfd);
4288 }
4289
4290 /* Create a ppc64 ELF linker hash table. */
4291
4292 static struct bfd_link_hash_table *
4293 ppc64_elf_link_hash_table_create (bfd *abfd)
4294 {
4295 struct ppc_link_hash_table *htab;
4296 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
4297
4298 htab = bfd_zmalloc (amt);
4299 if (htab == NULL)
4300 return NULL;
4301
4302 if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc,
4303 sizeof (struct ppc_link_hash_entry),
4304 PPC64_ELF_DATA))
4305 {
4306 free (htab);
4307 return NULL;
4308 }
4309
4310 /* Init the stub hash table too. */
4311 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc,
4312 sizeof (struct ppc_stub_hash_entry)))
4313 {
4314 _bfd_elf_link_hash_table_free (abfd);
4315 return NULL;
4316 }
4317
4318 /* And the branch hash table. */
4319 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc,
4320 sizeof (struct ppc_branch_hash_entry)))
4321 {
4322 bfd_hash_table_free (&htab->stub_hash_table);
4323 _bfd_elf_link_hash_table_free (abfd);
4324 return NULL;
4325 }
4326
4327 htab->tocsave_htab = htab_try_create (1024,
4328 tocsave_htab_hash,
4329 tocsave_htab_eq,
4330 NULL);
4331 if (htab->tocsave_htab == NULL)
4332 {
4333 ppc64_elf_link_hash_table_free (abfd);
4334 return NULL;
4335 }
4336 htab->elf.root.hash_table_free = ppc64_elf_link_hash_table_free;
4337
4338 /* Initializing two fields of the union is just cosmetic. We really
4339 only care about glist, but when compiled on a 32-bit host the
4340 bfd_vma fields are larger. Setting the bfd_vma to zero makes
4341 debugger inspection of these fields look nicer. */
4342 htab->elf.init_got_refcount.refcount = 0;
4343 htab->elf.init_got_refcount.glist = NULL;
4344 htab->elf.init_plt_refcount.refcount = 0;
4345 htab->elf.init_plt_refcount.glist = NULL;
4346 htab->elf.init_got_offset.offset = 0;
4347 htab->elf.init_got_offset.glist = NULL;
4348 htab->elf.init_plt_offset.offset = 0;
4349 htab->elf.init_plt_offset.glist = NULL;
4350
4351 return &htab->elf.root;
4352 }
4353
4354 /* Create sections for linker generated code. */
4355
4356 static bfd_boolean
4357 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
4358 {
4359 struct ppc_link_hash_table *htab;
4360 flagword flags;
4361
4362 htab = ppc_hash_table (info);
4363
4364 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
4365 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4366 if (htab->params->save_restore_funcs)
4367 {
4368 /* Create .sfpr for code to save and restore fp regs. */
4369 htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr",
4370 flags);
4371 if (htab->sfpr == NULL
4372 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
4373 return FALSE;
4374 }
4375
4376 if (bfd_link_relocatable (info))
4377 return TRUE;
4378
4379 /* Create .glink for lazy dynamic linking support. */
4380 htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink",
4381 flags);
4382 if (htab->glink == NULL
4383 || ! bfd_set_section_alignment (dynobj, htab->glink, 3))
4384 return FALSE;
4385
4386 if (!info->no_ld_generated_unwind_info)
4387 {
4388 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
4389 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4390 htab->glink_eh_frame = bfd_make_section_anyway_with_flags (dynobj,
4391 ".eh_frame",
4392 flags);
4393 if (htab->glink_eh_frame == NULL
4394 || !bfd_set_section_alignment (dynobj, htab->glink_eh_frame, 2))
4395 return FALSE;
4396 }
4397
4398 flags = SEC_ALLOC | SEC_LINKER_CREATED;
4399 htab->elf.iplt = bfd_make_section_anyway_with_flags (dynobj, ".iplt", flags);
4400 if (htab->elf.iplt == NULL
4401 || ! bfd_set_section_alignment (dynobj, htab->elf.iplt, 3))
4402 return FALSE;
4403
4404 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4405 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4406 htab->elf.irelplt
4407 = bfd_make_section_anyway_with_flags (dynobj, ".rela.iplt", flags);
4408 if (htab->elf.irelplt == NULL
4409 || ! bfd_set_section_alignment (dynobj, htab->elf.irelplt, 3))
4410 return FALSE;
4411
4412 /* Create branch lookup table for plt_branch stubs. */
4413 flags = (SEC_ALLOC | SEC_LOAD
4414 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4415 htab->brlt = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt",
4416 flags);
4417 if (htab->brlt == NULL
4418 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
4419 return FALSE;
4420
4421 if (!bfd_link_pic (info))
4422 return TRUE;
4423
4424 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4425 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4426 htab->relbrlt = bfd_make_section_anyway_with_flags (dynobj,
4427 ".rela.branch_lt",
4428 flags);
4429 if (htab->relbrlt == NULL
4430 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
4431 return FALSE;
4432
4433 return TRUE;
4434 }
4435
4436 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
4437
4438 bfd_boolean
4439 ppc64_elf_init_stub_bfd (struct bfd_link_info *info,
4440 struct ppc64_elf_params *params)
4441 {
4442 struct ppc_link_hash_table *htab;
4443
4444 elf_elfheader (params->stub_bfd)->e_ident[EI_CLASS] = ELFCLASS64;
4445
4446 /* Always hook our dynamic sections into the first bfd, which is the
4447 linker created stub bfd. This ensures that the GOT header is at
4448 the start of the output TOC section. */
4449 htab = ppc_hash_table (info);
4450 htab->elf.dynobj = params->stub_bfd;
4451 htab->params = params;
4452
4453 return create_linkage_sections (htab->elf.dynobj, info);
4454 }
4455
4456 /* Build a name for an entry in the stub hash table. */
4457
4458 static char *
4459 ppc_stub_name (const asection *input_section,
4460 const asection *sym_sec,
4461 const struct ppc_link_hash_entry *h,
4462 const Elf_Internal_Rela *rel)
4463 {
4464 char *stub_name;
4465 ssize_t len;
4466
4467 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
4468 offsets from a sym as a branch target? In fact, we could
4469 probably assume the addend is always zero. */
4470 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
4471
4472 if (h)
4473 {
4474 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
4475 stub_name = bfd_malloc (len);
4476 if (stub_name == NULL)
4477 return stub_name;
4478
4479 len = sprintf (stub_name, "%08x.%s+%x",
4480 input_section->id & 0xffffffff,
4481 h->elf.root.root.string,
4482 (int) rel->r_addend & 0xffffffff);
4483 }
4484 else
4485 {
4486 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
4487 stub_name = bfd_malloc (len);
4488 if (stub_name == NULL)
4489 return stub_name;
4490
4491 len = sprintf (stub_name, "%08x.%x:%x+%x",
4492 input_section->id & 0xffffffff,
4493 sym_sec->id & 0xffffffff,
4494 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
4495 (int) rel->r_addend & 0xffffffff);
4496 }
4497 if (len > 2 && stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
4498 stub_name[len - 2] = 0;
4499 return stub_name;
4500 }
4501
4502 /* Look up an entry in the stub hash. Stub entries are cached because
4503 creating the stub name takes a bit of time. */
4504
4505 static struct ppc_stub_hash_entry *
4506 ppc_get_stub_entry (const asection *input_section,
4507 const asection *sym_sec,
4508 struct ppc_link_hash_entry *h,
4509 const Elf_Internal_Rela *rel,
4510 struct ppc_link_hash_table *htab)
4511 {
4512 struct ppc_stub_hash_entry *stub_entry;
4513 struct map_stub *group;
4514
4515 /* If this input section is part of a group of sections sharing one
4516 stub section, then use the id of the first section in the group.
4517 Stub names need to include a section id, as there may well be
4518 more than one stub used to reach say, printf, and we need to
4519 distinguish between them. */
4520 group = htab->sec_info[input_section->id].u.group;
4521 if (group == NULL)
4522 return NULL;
4523
4524 if (h != NULL && h->u.stub_cache != NULL
4525 && h->u.stub_cache->h == h
4526 && h->u.stub_cache->group == group)
4527 {
4528 stub_entry = h->u.stub_cache;
4529 }
4530 else
4531 {
4532 char *stub_name;
4533
4534 stub_name = ppc_stub_name (group->link_sec, sym_sec, h, rel);
4535 if (stub_name == NULL)
4536 return NULL;
4537
4538 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
4539 stub_name, FALSE, FALSE);
4540 if (h != NULL)
4541 h->u.stub_cache = stub_entry;
4542
4543 free (stub_name);
4544 }
4545
4546 return stub_entry;
4547 }
4548
4549 /* Add a new stub entry to the stub hash. Not all fields of the new
4550 stub entry are initialised. */
4551
4552 static struct ppc_stub_hash_entry *
4553 ppc_add_stub (const char *stub_name,
4554 asection *section,
4555 struct bfd_link_info *info)
4556 {
4557 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4558 struct map_stub *group;
4559 asection *link_sec;
4560 asection *stub_sec;
4561 struct ppc_stub_hash_entry *stub_entry;
4562
4563 group = htab->sec_info[section->id].u.group;
4564 link_sec = group->link_sec;
4565 stub_sec = group->stub_sec;
4566 if (stub_sec == NULL)
4567 {
4568 size_t namelen;
4569 bfd_size_type len;
4570 char *s_name;
4571
4572 namelen = strlen (link_sec->name);
4573 len = namelen + sizeof (STUB_SUFFIX);
4574 s_name = bfd_alloc (htab->params->stub_bfd, len);
4575 if (s_name == NULL)
4576 return NULL;
4577
4578 memcpy (s_name, link_sec->name, namelen);
4579 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
4580 stub_sec = (*htab->params->add_stub_section) (s_name, link_sec);
4581 if (stub_sec == NULL)
4582 return NULL;
4583 group->stub_sec = stub_sec;
4584 }
4585
4586 /* Enter this entry into the linker stub hash table. */
4587 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
4588 TRUE, FALSE);
4589 if (stub_entry == NULL)
4590 {
4591 info->callbacks->einfo (_("%P: %B: cannot create stub entry %s\n"),
4592 section->owner, stub_name);
4593 return NULL;
4594 }
4595
4596 stub_entry->group = group;
4597 stub_entry->stub_offset = 0;
4598 return stub_entry;
4599 }
4600
4601 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
4602 not already done. */
4603
4604 static bfd_boolean
4605 create_got_section (bfd *abfd, struct bfd_link_info *info)
4606 {
4607 asection *got, *relgot;
4608 flagword flags;
4609 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4610
4611 if (!is_ppc64_elf (abfd))
4612 return FALSE;
4613 if (htab == NULL)
4614 return FALSE;
4615
4616 if (!htab->elf.sgot
4617 && !_bfd_elf_create_got_section (htab->elf.dynobj, info))
4618 return FALSE;
4619
4620 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
4621 | SEC_LINKER_CREATED);
4622
4623 got = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
4624 if (!got
4625 || !bfd_set_section_alignment (abfd, got, 3))
4626 return FALSE;
4627
4628 relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got",
4629 flags | SEC_READONLY);
4630 if (!relgot
4631 || ! bfd_set_section_alignment (abfd, relgot, 3))
4632 return FALSE;
4633
4634 ppc64_elf_tdata (abfd)->got = got;
4635 ppc64_elf_tdata (abfd)->relgot = relgot;
4636 return TRUE;
4637 }
4638
4639 /* Create the dynamic sections, and set up shortcuts. */
4640
4641 static bfd_boolean
4642 ppc64_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
4643 {
4644 struct ppc_link_hash_table *htab;
4645
4646 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
4647 return FALSE;
4648
4649 htab = ppc_hash_table (info);
4650 if (htab == NULL)
4651 return FALSE;
4652
4653 htab->dynbss = bfd_get_linker_section (dynobj, ".dynbss");
4654 if (!bfd_link_pic (info))
4655 htab->relbss = bfd_get_linker_section (dynobj, ".rela.bss");
4656
4657 if (!htab->elf.sgot || !htab->elf.splt || !htab->elf.srelplt || !htab->dynbss
4658 || (!bfd_link_pic (info) && !htab->relbss))
4659 abort ();
4660
4661 return TRUE;
4662 }
4663
4664 /* Follow indirect and warning symbol links. */
4665
4666 static inline struct bfd_link_hash_entry *
4667 follow_link (struct bfd_link_hash_entry *h)
4668 {
4669 while (h->type == bfd_link_hash_indirect
4670 || h->type == bfd_link_hash_warning)
4671 h = h->u.i.link;
4672 return h;
4673 }
4674
4675 static inline struct elf_link_hash_entry *
4676 elf_follow_link (struct elf_link_hash_entry *h)
4677 {
4678 return (struct elf_link_hash_entry *) follow_link (&h->root);
4679 }
4680
4681 static inline struct ppc_link_hash_entry *
4682 ppc_follow_link (struct ppc_link_hash_entry *h)
4683 {
4684 return (struct ppc_link_hash_entry *) follow_link (&h->elf.root);
4685 }
4686
4687 /* Merge PLT info on FROM with that on TO. */
4688
4689 static void
4690 move_plt_plist (struct ppc_link_hash_entry *from,
4691 struct ppc_link_hash_entry *to)
4692 {
4693 if (from->elf.plt.plist != NULL)
4694 {
4695 if (to->elf.plt.plist != NULL)
4696 {
4697 struct plt_entry **entp;
4698 struct plt_entry *ent;
4699
4700 for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; )
4701 {
4702 struct plt_entry *dent;
4703
4704 for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next)
4705 if (dent->addend == ent->addend)
4706 {
4707 dent->plt.refcount += ent->plt.refcount;
4708 *entp = ent->next;
4709 break;
4710 }
4711 if (dent == NULL)
4712 entp = &ent->next;
4713 }
4714 *entp = to->elf.plt.plist;
4715 }
4716
4717 to->elf.plt.plist = from->elf.plt.plist;
4718 from->elf.plt.plist = NULL;
4719 }
4720 }
4721
4722 /* Copy the extra info we tack onto an elf_link_hash_entry. */
4723
4724 static void
4725 ppc64_elf_copy_indirect_symbol (struct bfd_link_info *info,
4726 struct elf_link_hash_entry *dir,
4727 struct elf_link_hash_entry *ind)
4728 {
4729 struct ppc_link_hash_entry *edir, *eind;
4730
4731 edir = (struct ppc_link_hash_entry *) dir;
4732 eind = (struct ppc_link_hash_entry *) ind;
4733
4734 edir->is_func |= eind->is_func;
4735 edir->is_func_descriptor |= eind->is_func_descriptor;
4736 edir->tls_mask |= eind->tls_mask;
4737 if (eind->oh != NULL)
4738 edir->oh = ppc_follow_link (eind->oh);
4739
4740 /* If called to transfer flags for a weakdef during processing
4741 of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF.
4742 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
4743 if (!(ELIMINATE_COPY_RELOCS
4744 && eind->elf.root.type != bfd_link_hash_indirect
4745 && edir->elf.dynamic_adjusted))
4746 edir->elf.non_got_ref |= eind->elf.non_got_ref;
4747
4748 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
4749 edir->elf.ref_regular |= eind->elf.ref_regular;
4750 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
4751 edir->elf.needs_plt |= eind->elf.needs_plt;
4752 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed;
4753
4754 /* If we were called to copy over info for a weak sym, don't copy
4755 dyn_relocs, plt/got info, or dynindx. We used to copy dyn_relocs
4756 in order to simplify readonly_dynrelocs and save a field in the
4757 symbol hash entry, but that means dyn_relocs can't be used in any
4758 tests about a specific symbol, or affect other symbol flags which
4759 are then tested.
4760 Chain weakdefs so we can get from the weakdef back to an alias.
4761 The list is circular so that we don't need to use u.weakdef as
4762 well as this list to look at all aliases. */
4763 if (eind->elf.root.type != bfd_link_hash_indirect)
4764 {
4765 struct ppc_link_hash_entry *cur, *add, *next;
4766
4767 add = eind;
4768 do
4769 {
4770 cur = edir->weakref;
4771 if (cur != NULL)
4772 {
4773 do
4774 {
4775 /* We can be called twice for the same symbols.
4776 Don't make multiple loops. */
4777 if (cur == add)
4778 return;
4779 cur = cur->weakref;
4780 } while (cur != edir);
4781 }
4782 next = add->weakref;
4783 if (cur != add)
4784 {
4785 add->weakref = edir->weakref != NULL ? edir->weakref : edir;
4786 edir->weakref = add;
4787 }
4788 add = next;
4789 } while (add != NULL && add != eind);
4790 return;
4791 }
4792
4793 /* Copy over any dynamic relocs we may have on the indirect sym. */
4794 if (eind->dyn_relocs != NULL)
4795 {
4796 if (edir->dyn_relocs != NULL)
4797 {
4798 struct elf_dyn_relocs **pp;
4799 struct elf_dyn_relocs *p;
4800
4801 /* Add reloc counts against the indirect sym to the direct sym
4802 list. Merge any entries against the same section. */
4803 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
4804 {
4805 struct elf_dyn_relocs *q;
4806
4807 for (q = edir->dyn_relocs; q != NULL; q = q->next)
4808 if (q->sec == p->sec)
4809 {
4810 q->pc_count += p->pc_count;
4811 q->count += p->count;
4812 *pp = p->next;
4813 break;
4814 }
4815 if (q == NULL)
4816 pp = &p->next;
4817 }
4818 *pp = edir->dyn_relocs;
4819 }
4820
4821 edir->dyn_relocs = eind->dyn_relocs;
4822 eind->dyn_relocs = NULL;
4823 }
4824
4825 /* Copy over got entries that we may have already seen to the
4826 symbol which just became indirect. */
4827 if (eind->elf.got.glist != NULL)
4828 {
4829 if (edir->elf.got.glist != NULL)
4830 {
4831 struct got_entry **entp;
4832 struct got_entry *ent;
4833
4834 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
4835 {
4836 struct got_entry *dent;
4837
4838 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
4839 if (dent->addend == ent->addend
4840 && dent->owner == ent->owner
4841 && dent->tls_type == ent->tls_type)
4842 {
4843 dent->got.refcount += ent->got.refcount;
4844 *entp = ent->next;
4845 break;
4846 }
4847 if (dent == NULL)
4848 entp = &ent->next;
4849 }
4850 *entp = edir->elf.got.glist;
4851 }
4852
4853 edir->elf.got.glist = eind->elf.got.glist;
4854 eind->elf.got.glist = NULL;
4855 }
4856
4857 /* And plt entries. */
4858 move_plt_plist (eind, edir);
4859
4860 if (eind->elf.dynindx != -1)
4861 {
4862 if (edir->elf.dynindx != -1)
4863 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4864 edir->elf.dynstr_index);
4865 edir->elf.dynindx = eind->elf.dynindx;
4866 edir->elf.dynstr_index = eind->elf.dynstr_index;
4867 eind->elf.dynindx = -1;
4868 eind->elf.dynstr_index = 0;
4869 }
4870 }
4871
4872 /* Find the function descriptor hash entry from the given function code
4873 hash entry FH. Link the entries via their OH fields. */
4874
4875 static struct ppc_link_hash_entry *
4876 lookup_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
4877 {
4878 struct ppc_link_hash_entry *fdh = fh->oh;
4879
4880 if (fdh == NULL)
4881 {
4882 const char *fd_name = fh->elf.root.root.string + 1;
4883
4884 fdh = (struct ppc_link_hash_entry *)
4885 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
4886 if (fdh == NULL)
4887 return fdh;
4888
4889 fdh->is_func_descriptor = 1;
4890 fdh->oh = fh;
4891 fh->is_func = 1;
4892 fh->oh = fdh;
4893 }
4894
4895 return ppc_follow_link (fdh);
4896 }
4897
4898 /* Make a fake function descriptor sym for the code sym FH. */
4899
4900 static struct ppc_link_hash_entry *
4901 make_fdh (struct bfd_link_info *info,
4902 struct ppc_link_hash_entry *fh)
4903 {
4904 bfd *abfd;
4905 asymbol *newsym;
4906 struct bfd_link_hash_entry *bh;
4907 struct ppc_link_hash_entry *fdh;
4908
4909 abfd = fh->elf.root.u.undef.abfd;
4910 newsym = bfd_make_empty_symbol (abfd);
4911 newsym->name = fh->elf.root.root.string + 1;
4912 newsym->section = bfd_und_section_ptr;
4913 newsym->value = 0;
4914 newsym->flags = BSF_WEAK;
4915
4916 bh = NULL;
4917 if (!_bfd_generic_link_add_one_symbol (info, abfd, newsym->name,
4918 newsym->flags, newsym->section,
4919 newsym->value, NULL, FALSE, FALSE,
4920 &bh))
4921 return NULL;
4922
4923 fdh = (struct ppc_link_hash_entry *) bh;
4924 fdh->elf.non_elf = 0;
4925 fdh->fake = 1;
4926 fdh->is_func_descriptor = 1;
4927 fdh->oh = fh;
4928 fh->is_func = 1;
4929 fh->oh = fdh;
4930 return fdh;
4931 }
4932
4933 /* Fix function descriptor symbols defined in .opd sections to be
4934 function type. */
4935
4936 static bfd_boolean
4937 ppc64_elf_add_symbol_hook (bfd *ibfd,
4938 struct bfd_link_info *info,
4939 Elf_Internal_Sym *isym,
4940 const char **name,
4941 flagword *flags ATTRIBUTE_UNUSED,
4942 asection **sec,
4943 bfd_vma *value)
4944 {
4945 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC
4946 && (ibfd->flags & DYNAMIC) == 0
4947 && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour)
4948 elf_tdata (info->output_bfd)->has_gnu_symbols |= elf_gnu_symbol_ifunc;
4949
4950 if (*sec != NULL
4951 && strcmp ((*sec)->name, ".opd") == 0)
4952 {
4953 asection *code_sec;
4954
4955 if (!(ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC
4956 || ELF_ST_TYPE (isym->st_info) == STT_FUNC))
4957 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
4958
4959 /* If the symbol is a function defined in .opd, and the function
4960 code is in a discarded group, let it appear to be undefined. */
4961 if (!bfd_link_relocatable (info)
4962 && (*sec)->reloc_count != 0
4963 && opd_entry_value (*sec, *value, &code_sec, NULL,
4964 FALSE) != (bfd_vma) -1
4965 && discarded_section (code_sec))
4966 {
4967 *sec = bfd_und_section_ptr;
4968 isym->st_shndx = SHN_UNDEF;
4969 }
4970 }
4971 else if (*sec != NULL
4972 && strcmp ((*sec)->name, ".toc") == 0
4973 && ELF_ST_TYPE (isym->st_info) == STT_OBJECT)
4974 {
4975 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4976 if (htab != NULL)
4977 htab->params->object_in_toc = 1;
4978 }
4979
4980 if ((STO_PPC64_LOCAL_MASK & isym->st_other) != 0)
4981 {
4982 if (abiversion (ibfd) == 0)
4983 set_abiversion (ibfd, 2);
4984 else if (abiversion (ibfd) == 1)
4985 {
4986 info->callbacks->einfo (_("%P: symbol '%s' has invalid st_other"
4987 " for ABI version 1\n"), name);
4988 bfd_set_error (bfd_error_bad_value);
4989 return FALSE;
4990 }
4991 }
4992
4993 return TRUE;
4994 }
4995
4996 /* Merge non-visibility st_other attributes: local entry point. */
4997
4998 static void
4999 ppc64_elf_merge_symbol_attribute (struct elf_link_hash_entry *h,
5000 const Elf_Internal_Sym *isym,
5001 bfd_boolean definition,
5002 bfd_boolean dynamic)
5003 {
5004 if (definition && !dynamic)
5005 h->other = ((isym->st_other & ~ELF_ST_VISIBILITY (-1))
5006 | ELF_ST_VISIBILITY (h->other));
5007 }
5008
5009 /* This function makes an old ABI object reference to ".bar" cause the
5010 inclusion of a new ABI object archive that defines "bar".
5011 NAME is a symbol defined in an archive. Return a symbol in the hash
5012 table that might be satisfied by the archive symbols. */
5013
5014 static struct elf_link_hash_entry *
5015 ppc64_elf_archive_symbol_lookup (bfd *abfd,
5016 struct bfd_link_info *info,
5017 const char *name)
5018 {
5019 struct elf_link_hash_entry *h;
5020 char *dot_name;
5021 size_t len;
5022
5023 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
5024 if (h != NULL
5025 /* Don't return this sym if it is a fake function descriptor
5026 created by add_symbol_adjust. */
5027 && !(h->root.type == bfd_link_hash_undefweak
5028 && ((struct ppc_link_hash_entry *) h)->fake))
5029 return h;
5030
5031 if (name[0] == '.')
5032 return h;
5033
5034 len = strlen (name);
5035 dot_name = bfd_alloc (abfd, len + 2);
5036 if (dot_name == NULL)
5037 return (struct elf_link_hash_entry *) 0 - 1;
5038 dot_name[0] = '.';
5039 memcpy (dot_name + 1, name, len + 1);
5040 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
5041 bfd_release (abfd, dot_name);
5042 return h;
5043 }
5044
5045 /* This function satisfies all old ABI object references to ".bar" if a
5046 new ABI object defines "bar". Well, at least, undefined dot symbols
5047 are made weak. This stops later archive searches from including an
5048 object if we already have a function descriptor definition. It also
5049 prevents the linker complaining about undefined symbols.
5050 We also check and correct mismatched symbol visibility here. The
5051 most restrictive visibility of the function descriptor and the
5052 function entry symbol is used. */
5053
5054 static bfd_boolean
5055 add_symbol_adjust (struct ppc_link_hash_entry *eh, struct bfd_link_info *info)
5056 {
5057 struct ppc_link_hash_table *htab;
5058 struct ppc_link_hash_entry *fdh;
5059
5060 if (eh->elf.root.type == bfd_link_hash_indirect)
5061 return TRUE;
5062
5063 if (eh->elf.root.type == bfd_link_hash_warning)
5064 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
5065
5066 if (eh->elf.root.root.string[0] != '.')
5067 abort ();
5068
5069 htab = ppc_hash_table (info);
5070 if (htab == NULL)
5071 return FALSE;
5072
5073 fdh = lookup_fdh (eh, htab);
5074 if (fdh == NULL)
5075 {
5076 if (!bfd_link_relocatable (info)
5077 && (eh->elf.root.type == bfd_link_hash_undefined
5078 || eh->elf.root.type == bfd_link_hash_undefweak)
5079 && eh->elf.ref_regular)
5080 {
5081 /* Make an undefweak function descriptor sym, which is enough to
5082 pull in an --as-needed shared lib, but won't cause link
5083 errors. Archives are handled elsewhere. */
5084 fdh = make_fdh (info, eh);
5085 if (fdh == NULL)
5086 return FALSE;
5087 fdh->elf.ref_regular = 1;
5088 }
5089 }
5090 else
5091 {
5092 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
5093 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
5094 if (entry_vis < descr_vis)
5095 fdh->elf.other += entry_vis - descr_vis;
5096 else if (entry_vis > descr_vis)
5097 eh->elf.other += descr_vis - entry_vis;
5098
5099 if ((fdh->elf.root.type == bfd_link_hash_defined
5100 || fdh->elf.root.type == bfd_link_hash_defweak)
5101 && eh->elf.root.type == bfd_link_hash_undefined)
5102 {
5103 eh->elf.root.type = bfd_link_hash_undefweak;
5104 eh->was_undefined = 1;
5105 htab->twiddled_syms = 1;
5106 }
5107 }
5108
5109 return TRUE;
5110 }
5111
5112 /* Set up opd section info and abiversion for IBFD, and process list
5113 of dot-symbols we made in link_hash_newfunc. */
5114
5115 static bfd_boolean
5116 ppc64_elf_before_check_relocs (bfd *ibfd, struct bfd_link_info *info)
5117 {
5118 struct ppc_link_hash_table *htab;
5119 struct ppc_link_hash_entry **p, *eh;
5120 asection *opd = bfd_get_section_by_name (ibfd, ".opd");
5121
5122 if (opd != NULL && opd->size != 0)
5123 {
5124 if (abiversion (ibfd) == 0)
5125 set_abiversion (ibfd, 1);
5126 else if (abiversion (ibfd) >= 2)
5127 {
5128 info->callbacks->einfo (_("%P: %B .opd not allowed in ABI"
5129 " version %d\n"),
5130 ibfd, abiversion (ibfd));
5131 bfd_set_error (bfd_error_bad_value);
5132 return FALSE;
5133 }
5134
5135 if ((ibfd->flags & DYNAMIC) == 0
5136 && (opd->flags & SEC_RELOC) != 0
5137 && opd->reloc_count != 0
5138 && !bfd_is_abs_section (opd->output_section))
5139 {
5140 /* Garbage collection needs some extra help with .opd sections.
5141 We don't want to necessarily keep everything referenced by
5142 relocs in .opd, as that would keep all functions. Instead,
5143 if we reference an .opd symbol (a function descriptor), we
5144 want to keep the function code symbol's section. This is
5145 easy for global symbols, but for local syms we need to keep
5146 information about the associated function section. */
5147 bfd_size_type amt;
5148 asection **opd_sym_map;
5149
5150 amt = OPD_NDX (opd->size) * sizeof (*opd_sym_map);
5151 opd_sym_map = bfd_zalloc (ibfd, amt);
5152 if (opd_sym_map == NULL)
5153 return FALSE;
5154 ppc64_elf_section_data (opd)->u.opd.func_sec = opd_sym_map;
5155 BFD_ASSERT (ppc64_elf_section_data (opd)->sec_type == sec_normal);
5156 ppc64_elf_section_data (opd)->sec_type = sec_opd;
5157 }
5158 }
5159
5160 if (!is_ppc64_elf (info->output_bfd))
5161 return TRUE;
5162 htab = ppc_hash_table (info);
5163 if (htab == NULL)
5164 return FALSE;
5165
5166 /* For input files without an explicit abiversion in e_flags
5167 we should have flagged any with symbol st_other bits set
5168 as ELFv1 and above flagged those with .opd as ELFv2.
5169 Set the output abiversion if not yet set, and for any input
5170 still ambiguous, take its abiversion from the output.
5171 Differences in ABI are reported later. */
5172 if (abiversion (info->output_bfd) == 0)
5173 set_abiversion (info->output_bfd, abiversion (ibfd));
5174 else if (abiversion (ibfd) == 0)
5175 set_abiversion (ibfd, abiversion (info->output_bfd));
5176
5177 p = &htab->dot_syms;
5178 while ((eh = *p) != NULL)
5179 {
5180 *p = NULL;
5181 if (&eh->elf == htab->elf.hgot)
5182 ;
5183 else if (htab->elf.hgot == NULL
5184 && strcmp (eh->elf.root.root.string, ".TOC.") == 0)
5185 htab->elf.hgot = &eh->elf;
5186 else if (!add_symbol_adjust (eh, info))
5187 return FALSE;
5188 p = &eh->u.next_dot_sym;
5189 }
5190
5191 /* Clear the list for non-ppc64 input files. */
5192 p = &htab->dot_syms;
5193 while ((eh = *p) != NULL)
5194 {
5195 *p = NULL;
5196 p = &eh->u.next_dot_sym;
5197 }
5198
5199 /* We need to fix the undefs list for any syms we have twiddled to
5200 undefweak. */
5201 if (htab->twiddled_syms)
5202 {
5203 bfd_link_repair_undef_list (&htab->elf.root);
5204 htab->twiddled_syms = 0;
5205 }
5206 return TRUE;
5207 }
5208
5209 /* Undo hash table changes when an --as-needed input file is determined
5210 not to be needed. */
5211
5212 static bfd_boolean
5213 ppc64_elf_notice_as_needed (bfd *ibfd,
5214 struct bfd_link_info *info,
5215 enum notice_asneeded_action act)
5216 {
5217 if (act == notice_not_needed)
5218 {
5219 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5220
5221 if (htab == NULL)
5222 return FALSE;
5223
5224 htab->dot_syms = NULL;
5225 }
5226 return _bfd_elf_notice_as_needed (ibfd, info, act);
5227 }
5228
5229 /* If --just-symbols against a final linked binary, then assume we need
5230 toc adjusting stubs when calling functions defined there. */
5231
5232 static void
5233 ppc64_elf_link_just_syms (asection *sec, struct bfd_link_info *info)
5234 {
5235 if ((sec->flags & SEC_CODE) != 0
5236 && (sec->owner->flags & (EXEC_P | DYNAMIC)) != 0
5237 && is_ppc64_elf (sec->owner))
5238 {
5239 if (abiversion (sec->owner) >= 2
5240 || bfd_get_section_by_name (sec->owner, ".opd") != NULL)
5241 sec->has_toc_reloc = 1;
5242 }
5243 _bfd_elf_link_just_syms (sec, info);
5244 }
5245
5246 static struct plt_entry **
5247 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
5248 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
5249 {
5250 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
5251 struct plt_entry **local_plt;
5252 unsigned char *local_got_tls_masks;
5253
5254 if (local_got_ents == NULL)
5255 {
5256 bfd_size_type size = symtab_hdr->sh_info;
5257
5258 size *= (sizeof (*local_got_ents)
5259 + sizeof (*local_plt)
5260 + sizeof (*local_got_tls_masks));
5261 local_got_ents = bfd_zalloc (abfd, size);
5262 if (local_got_ents == NULL)
5263 return NULL;
5264 elf_local_got_ents (abfd) = local_got_ents;
5265 }
5266
5267 if ((tls_type & (PLT_IFUNC | TLS_EXPLICIT)) == 0)
5268 {
5269 struct got_entry *ent;
5270
5271 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
5272 if (ent->addend == r_addend
5273 && ent->owner == abfd
5274 && ent->tls_type == tls_type)
5275 break;
5276 if (ent == NULL)
5277 {
5278 bfd_size_type amt = sizeof (*ent);
5279 ent = bfd_alloc (abfd, amt);
5280 if (ent == NULL)
5281 return FALSE;
5282 ent->next = local_got_ents[r_symndx];
5283 ent->addend = r_addend;
5284 ent->owner = abfd;
5285 ent->tls_type = tls_type;
5286 ent->is_indirect = FALSE;
5287 ent->got.refcount = 0;
5288 local_got_ents[r_symndx] = ent;
5289 }
5290 ent->got.refcount += 1;
5291 }
5292
5293 local_plt = (struct plt_entry **) (local_got_ents + symtab_hdr->sh_info);
5294 local_got_tls_masks = (unsigned char *) (local_plt + symtab_hdr->sh_info);
5295 local_got_tls_masks[r_symndx] |= tls_type;
5296
5297 return local_plt + r_symndx;
5298 }
5299
5300 static bfd_boolean
5301 update_plt_info (bfd *abfd, struct plt_entry **plist, bfd_vma addend)
5302 {
5303 struct plt_entry *ent;
5304
5305 for (ent = *plist; ent != NULL; ent = ent->next)
5306 if (ent->addend == addend)
5307 break;
5308 if (ent == NULL)
5309 {
5310 bfd_size_type amt = sizeof (*ent);
5311 ent = bfd_alloc (abfd, amt);
5312 if (ent == NULL)
5313 return FALSE;
5314 ent->next = *plist;
5315 ent->addend = addend;
5316 ent->plt.refcount = 0;
5317 *plist = ent;
5318 }
5319 ent->plt.refcount += 1;
5320 return TRUE;
5321 }
5322
5323 static bfd_boolean
5324 is_branch_reloc (enum elf_ppc64_reloc_type r_type)
5325 {
5326 return (r_type == R_PPC64_REL24
5327 || r_type == R_PPC64_REL14
5328 || r_type == R_PPC64_REL14_BRTAKEN
5329 || r_type == R_PPC64_REL14_BRNTAKEN
5330 || r_type == R_PPC64_ADDR24
5331 || r_type == R_PPC64_ADDR14
5332 || r_type == R_PPC64_ADDR14_BRTAKEN
5333 || r_type == R_PPC64_ADDR14_BRNTAKEN);
5334 }
5335
5336 /* Look through the relocs for a section during the first phase, and
5337 calculate needed space in the global offset table, procedure
5338 linkage table, and dynamic reloc sections. */
5339
5340 static bfd_boolean
5341 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
5342 asection *sec, const Elf_Internal_Rela *relocs)
5343 {
5344 struct ppc_link_hash_table *htab;
5345 Elf_Internal_Shdr *symtab_hdr;
5346 struct elf_link_hash_entry **sym_hashes;
5347 const Elf_Internal_Rela *rel;
5348 const Elf_Internal_Rela *rel_end;
5349 asection *sreloc;
5350 asection **opd_sym_map;
5351 struct elf_link_hash_entry *tga, *dottga;
5352
5353 if (bfd_link_relocatable (info))
5354 return TRUE;
5355
5356 /* Don't do anything special with non-loaded, non-alloced sections.
5357 In particular, any relocs in such sections should not affect GOT
5358 and PLT reference counting (ie. we don't allow them to create GOT
5359 or PLT entries), there's no possibility or desire to optimize TLS
5360 relocs, and there's not much point in propagating relocs to shared
5361 libs that the dynamic linker won't relocate. */
5362 if ((sec->flags & SEC_ALLOC) == 0)
5363 return TRUE;
5364
5365 BFD_ASSERT (is_ppc64_elf (abfd));
5366
5367 htab = ppc_hash_table (info);
5368 if (htab == NULL)
5369 return FALSE;
5370
5371 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
5372 FALSE, FALSE, TRUE);
5373 dottga = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
5374 FALSE, FALSE, TRUE);
5375 symtab_hdr = &elf_symtab_hdr (abfd);
5376 sym_hashes = elf_sym_hashes (abfd);
5377 sreloc = NULL;
5378 opd_sym_map = NULL;
5379 if (ppc64_elf_section_data (sec) != NULL
5380 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
5381 opd_sym_map = ppc64_elf_section_data (sec)->u.opd.func_sec;
5382
5383 rel_end = relocs + sec->reloc_count;
5384 for (rel = relocs; rel < rel_end; rel++)
5385 {
5386 unsigned long r_symndx;
5387 struct elf_link_hash_entry *h;
5388 enum elf_ppc64_reloc_type r_type;
5389 int tls_type;
5390 struct _ppc64_elf_section_data *ppc64_sec;
5391 struct plt_entry **ifunc, **plt_list;
5392
5393 r_symndx = ELF64_R_SYM (rel->r_info);
5394 if (r_symndx < symtab_hdr->sh_info)
5395 h = NULL;
5396 else
5397 {
5398 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5399 h = elf_follow_link (h);
5400
5401 /* PR15323, ref flags aren't set for references in the same
5402 object. */
5403 h->root.non_ir_ref = 1;
5404
5405 if (h == htab->elf.hgot)
5406 sec->has_toc_reloc = 1;
5407 }
5408
5409 tls_type = 0;
5410 ifunc = NULL;
5411 if (h != NULL)
5412 {
5413 if (h->type == STT_GNU_IFUNC)
5414 {
5415 h->needs_plt = 1;
5416 ifunc = &h->plt.plist;
5417 }
5418 }
5419 else
5420 {
5421 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5422 abfd, r_symndx);
5423 if (isym == NULL)
5424 return FALSE;
5425
5426 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
5427 {
5428 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
5429 rel->r_addend, PLT_IFUNC);
5430 if (ifunc == NULL)
5431 return FALSE;
5432 }
5433 }
5434
5435 r_type = ELF64_R_TYPE (rel->r_info);
5436 switch (r_type)
5437 {
5438 case R_PPC64_TLSGD:
5439 case R_PPC64_TLSLD:
5440 /* These special tls relocs tie a call to __tls_get_addr with
5441 its parameter symbol. */
5442 break;
5443
5444 case R_PPC64_GOT_TLSLD16:
5445 case R_PPC64_GOT_TLSLD16_LO:
5446 case R_PPC64_GOT_TLSLD16_HI:
5447 case R_PPC64_GOT_TLSLD16_HA:
5448 tls_type = TLS_TLS | TLS_LD;
5449 goto dogottls;
5450
5451 case R_PPC64_GOT_TLSGD16:
5452 case R_PPC64_GOT_TLSGD16_LO:
5453 case R_PPC64_GOT_TLSGD16_HI:
5454 case R_PPC64_GOT_TLSGD16_HA:
5455 tls_type = TLS_TLS | TLS_GD;
5456 goto dogottls;
5457
5458 case R_PPC64_GOT_TPREL16_DS:
5459 case R_PPC64_GOT_TPREL16_LO_DS:
5460 case R_PPC64_GOT_TPREL16_HI:
5461 case R_PPC64_GOT_TPREL16_HA:
5462 if (bfd_link_pic (info))
5463 info->flags |= DF_STATIC_TLS;
5464 tls_type = TLS_TLS | TLS_TPREL;
5465 goto dogottls;
5466
5467 case R_PPC64_GOT_DTPREL16_DS:
5468 case R_PPC64_GOT_DTPREL16_LO_DS:
5469 case R_PPC64_GOT_DTPREL16_HI:
5470 case R_PPC64_GOT_DTPREL16_HA:
5471 tls_type = TLS_TLS | TLS_DTPREL;
5472 dogottls:
5473 sec->has_tls_reloc = 1;
5474 /* Fall through */
5475
5476 case R_PPC64_GOT16:
5477 case R_PPC64_GOT16_DS:
5478 case R_PPC64_GOT16_HA:
5479 case R_PPC64_GOT16_HI:
5480 case R_PPC64_GOT16_LO:
5481 case R_PPC64_GOT16_LO_DS:
5482 /* This symbol requires a global offset table entry. */
5483 sec->has_toc_reloc = 1;
5484 if (r_type == R_PPC64_GOT_TLSLD16
5485 || r_type == R_PPC64_GOT_TLSGD16
5486 || r_type == R_PPC64_GOT_TPREL16_DS
5487 || r_type == R_PPC64_GOT_DTPREL16_DS
5488 || r_type == R_PPC64_GOT16
5489 || r_type == R_PPC64_GOT16_DS)
5490 {
5491 htab->do_multi_toc = 1;
5492 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5493 }
5494
5495 if (ppc64_elf_tdata (abfd)->got == NULL
5496 && !create_got_section (abfd, info))
5497 return FALSE;
5498
5499 if (h != NULL)
5500 {
5501 struct ppc_link_hash_entry *eh;
5502 struct got_entry *ent;
5503
5504 eh = (struct ppc_link_hash_entry *) h;
5505 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
5506 if (ent->addend == rel->r_addend
5507 && ent->owner == abfd
5508 && ent->tls_type == tls_type)
5509 break;
5510 if (ent == NULL)
5511 {
5512 bfd_size_type amt = sizeof (*ent);
5513 ent = bfd_alloc (abfd, amt);
5514 if (ent == NULL)
5515 return FALSE;
5516 ent->next = eh->elf.got.glist;
5517 ent->addend = rel->r_addend;
5518 ent->owner = abfd;
5519 ent->tls_type = tls_type;
5520 ent->is_indirect = FALSE;
5521 ent->got.refcount = 0;
5522 eh->elf.got.glist = ent;
5523 }
5524 ent->got.refcount += 1;
5525 eh->tls_mask |= tls_type;
5526 }
5527 else
5528 /* This is a global offset table entry for a local symbol. */
5529 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5530 rel->r_addend, tls_type))
5531 return FALSE;
5532
5533 /* We may also need a plt entry if the symbol turns out to be
5534 an ifunc. */
5535 if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1)
5536 {
5537 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5538 return FALSE;
5539 }
5540 break;
5541
5542 case R_PPC64_PLT16_HA:
5543 case R_PPC64_PLT16_HI:
5544 case R_PPC64_PLT16_LO:
5545 case R_PPC64_PLT32:
5546 case R_PPC64_PLT64:
5547 /* This symbol requires a procedure linkage table entry. */
5548 plt_list = ifunc;
5549 if (h != NULL)
5550 {
5551 h->needs_plt = 1;
5552 if (h->root.root.string[0] == '.'
5553 && h->root.root.string[1] != '\0')
5554 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5555 plt_list = &h->plt.plist;
5556 }
5557 if (plt_list == NULL)
5558 {
5559 /* It does not make sense to have a procedure linkage
5560 table entry for a non-ifunc local symbol. */
5561 info->callbacks->einfo
5562 (_("%P: %H: %s reloc against local symbol\n"),
5563 abfd, sec, rel->r_offset,
5564 ppc64_elf_howto_table[r_type]->name);
5565 bfd_set_error (bfd_error_bad_value);
5566 return FALSE;
5567 }
5568 if (!update_plt_info (abfd, plt_list, rel->r_addend))
5569 return FALSE;
5570 break;
5571
5572 /* The following relocations don't need to propagate the
5573 relocation if linking a shared object since they are
5574 section relative. */
5575 case R_PPC64_SECTOFF:
5576 case R_PPC64_SECTOFF_LO:
5577 case R_PPC64_SECTOFF_HI:
5578 case R_PPC64_SECTOFF_HA:
5579 case R_PPC64_SECTOFF_DS:
5580 case R_PPC64_SECTOFF_LO_DS:
5581 case R_PPC64_DTPREL16:
5582 case R_PPC64_DTPREL16_LO:
5583 case R_PPC64_DTPREL16_HI:
5584 case R_PPC64_DTPREL16_HA:
5585 case R_PPC64_DTPREL16_DS:
5586 case R_PPC64_DTPREL16_LO_DS:
5587 case R_PPC64_DTPREL16_HIGH:
5588 case R_PPC64_DTPREL16_HIGHA:
5589 case R_PPC64_DTPREL16_HIGHER:
5590 case R_PPC64_DTPREL16_HIGHERA:
5591 case R_PPC64_DTPREL16_HIGHEST:
5592 case R_PPC64_DTPREL16_HIGHESTA:
5593 break;
5594
5595 /* Nor do these. */
5596 case R_PPC64_REL16:
5597 case R_PPC64_REL16_LO:
5598 case R_PPC64_REL16_HI:
5599 case R_PPC64_REL16_HA:
5600 case R_PPC64_REL16DX_HA:
5601 break;
5602
5603 /* Not supported as a dynamic relocation. */
5604 case R_PPC64_ADDR64_LOCAL:
5605 if (bfd_link_pic (info))
5606 {
5607 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
5608 ppc_howto_init ();
5609 info->callbacks->einfo (_("%P: %H: %s reloc unsupported "
5610 "in shared libraries and PIEs.\n"),
5611 abfd, sec, rel->r_offset,
5612 ppc64_elf_howto_table[r_type]->name);
5613 bfd_set_error (bfd_error_bad_value);
5614 return FALSE;
5615 }
5616 break;
5617
5618 case R_PPC64_TOC16:
5619 case R_PPC64_TOC16_DS:
5620 htab->do_multi_toc = 1;
5621 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5622 /* Fall through. */
5623 case R_PPC64_TOC16_LO:
5624 case R_PPC64_TOC16_HI:
5625 case R_PPC64_TOC16_HA:
5626 case R_PPC64_TOC16_LO_DS:
5627 sec->has_toc_reloc = 1;
5628 break;
5629
5630 /* Marker reloc. */
5631 case R_PPC64_ENTRY:
5632 break;
5633
5634 /* This relocation describes the C++ object vtable hierarchy.
5635 Reconstruct it for later use during GC. */
5636 case R_PPC64_GNU_VTINHERIT:
5637 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
5638 return FALSE;
5639 break;
5640
5641 /* This relocation describes which C++ vtable entries are actually
5642 used. Record for later use during GC. */
5643 case R_PPC64_GNU_VTENTRY:
5644 BFD_ASSERT (h != NULL);
5645 if (h != NULL
5646 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
5647 return FALSE;
5648 break;
5649
5650 case R_PPC64_REL14:
5651 case R_PPC64_REL14_BRTAKEN:
5652 case R_PPC64_REL14_BRNTAKEN:
5653 {
5654 asection *dest = NULL;
5655
5656 /* Heuristic: If jumping outside our section, chances are
5657 we are going to need a stub. */
5658 if (h != NULL)
5659 {
5660 /* If the sym is weak it may be overridden later, so
5661 don't assume we know where a weak sym lives. */
5662 if (h->root.type == bfd_link_hash_defined)
5663 dest = h->root.u.def.section;
5664 }
5665 else
5666 {
5667 Elf_Internal_Sym *isym;
5668
5669 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5670 abfd, r_symndx);
5671 if (isym == NULL)
5672 return FALSE;
5673
5674 dest = bfd_section_from_elf_index (abfd, isym->st_shndx);
5675 }
5676
5677 if (dest != sec)
5678 ppc64_elf_section_data (sec)->has_14bit_branch = 1;
5679 }
5680 /* Fall through. */
5681
5682 case R_PPC64_REL24:
5683 plt_list = ifunc;
5684 if (h != NULL)
5685 {
5686 h->needs_plt = 1;
5687 if (h->root.root.string[0] == '.'
5688 && h->root.root.string[1] != '\0')
5689 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5690
5691 if (h == tga || h == dottga)
5692 {
5693 sec->has_tls_reloc = 1;
5694 if (rel != relocs
5695 && (ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSGD
5696 || ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSLD))
5697 /* We have a new-style __tls_get_addr call with
5698 a marker reloc. */
5699 ;
5700 else
5701 /* Mark this section as having an old-style call. */
5702 sec->has_tls_get_addr_call = 1;
5703 }
5704 plt_list = &h->plt.plist;
5705 }
5706
5707 /* We may need a .plt entry if the function this reloc
5708 refers to is in a shared lib. */
5709 if (plt_list
5710 && !update_plt_info (abfd, plt_list, rel->r_addend))
5711 return FALSE;
5712 break;
5713
5714 case R_PPC64_ADDR14:
5715 case R_PPC64_ADDR14_BRNTAKEN:
5716 case R_PPC64_ADDR14_BRTAKEN:
5717 case R_PPC64_ADDR24:
5718 goto dodyn;
5719
5720 case R_PPC64_TPREL64:
5721 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
5722 if (bfd_link_pic (info))
5723 info->flags |= DF_STATIC_TLS;
5724 goto dotlstoc;
5725
5726 case R_PPC64_DTPMOD64:
5727 if (rel + 1 < rel_end
5728 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
5729 && rel[1].r_offset == rel->r_offset + 8)
5730 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
5731 else
5732 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
5733 goto dotlstoc;
5734
5735 case R_PPC64_DTPREL64:
5736 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
5737 if (rel != relocs
5738 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
5739 && rel[-1].r_offset == rel->r_offset - 8)
5740 /* This is the second reloc of a dtpmod, dtprel pair.
5741 Don't mark with TLS_DTPREL. */
5742 goto dodyn;
5743
5744 dotlstoc:
5745 sec->has_tls_reloc = 1;
5746 if (h != NULL)
5747 {
5748 struct ppc_link_hash_entry *eh;
5749 eh = (struct ppc_link_hash_entry *) h;
5750 eh->tls_mask |= tls_type;
5751 }
5752 else
5753 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5754 rel->r_addend, tls_type))
5755 return FALSE;
5756
5757 ppc64_sec = ppc64_elf_section_data (sec);
5758 if (ppc64_sec->sec_type != sec_toc)
5759 {
5760 bfd_size_type amt;
5761
5762 /* One extra to simplify get_tls_mask. */
5763 amt = sec->size * sizeof (unsigned) / 8 + sizeof (unsigned);
5764 ppc64_sec->u.toc.symndx = bfd_zalloc (abfd, amt);
5765 if (ppc64_sec->u.toc.symndx == NULL)
5766 return FALSE;
5767 amt = sec->size * sizeof (bfd_vma) / 8;
5768 ppc64_sec->u.toc.add = bfd_zalloc (abfd, amt);
5769 if (ppc64_sec->u.toc.add == NULL)
5770 return FALSE;
5771 BFD_ASSERT (ppc64_sec->sec_type == sec_normal);
5772 ppc64_sec->sec_type = sec_toc;
5773 }
5774 BFD_ASSERT (rel->r_offset % 8 == 0);
5775 ppc64_sec->u.toc.symndx[rel->r_offset / 8] = r_symndx;
5776 ppc64_sec->u.toc.add[rel->r_offset / 8] = rel->r_addend;
5777
5778 /* Mark the second slot of a GD or LD entry.
5779 -1 to indicate GD and -2 to indicate LD. */
5780 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
5781 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -1;
5782 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
5783 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -2;
5784 goto dodyn;
5785
5786 case R_PPC64_TPREL16:
5787 case R_PPC64_TPREL16_LO:
5788 case R_PPC64_TPREL16_HI:
5789 case R_PPC64_TPREL16_HA:
5790 case R_PPC64_TPREL16_DS:
5791 case R_PPC64_TPREL16_LO_DS:
5792 case R_PPC64_TPREL16_HIGH:
5793 case R_PPC64_TPREL16_HIGHA:
5794 case R_PPC64_TPREL16_HIGHER:
5795 case R_PPC64_TPREL16_HIGHERA:
5796 case R_PPC64_TPREL16_HIGHEST:
5797 case R_PPC64_TPREL16_HIGHESTA:
5798 if (bfd_link_pic (info))
5799 {
5800 info->flags |= DF_STATIC_TLS;
5801 goto dodyn;
5802 }
5803 break;
5804
5805 case R_PPC64_ADDR64:
5806 if (opd_sym_map != NULL
5807 && rel + 1 < rel_end
5808 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
5809 {
5810 if (h != NULL)
5811 {
5812 if (h->root.root.string[0] == '.'
5813 && h->root.root.string[1] != 0
5814 && lookup_fdh ((struct ppc_link_hash_entry *) h, htab))
5815 ;
5816 else
5817 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5818 }
5819 else
5820 {
5821 asection *s;
5822 Elf_Internal_Sym *isym;
5823
5824 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5825 abfd, r_symndx);
5826 if (isym == NULL)
5827 return FALSE;
5828
5829 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5830 if (s != NULL && s != sec)
5831 opd_sym_map[OPD_NDX (rel->r_offset)] = s;
5832 }
5833 }
5834 /* Fall through. */
5835
5836 case R_PPC64_ADDR16:
5837 case R_PPC64_ADDR16_DS:
5838 case R_PPC64_ADDR16_HA:
5839 case R_PPC64_ADDR16_HI:
5840 case R_PPC64_ADDR16_HIGH:
5841 case R_PPC64_ADDR16_HIGHA:
5842 case R_PPC64_ADDR16_HIGHER:
5843 case R_PPC64_ADDR16_HIGHERA:
5844 case R_PPC64_ADDR16_HIGHEST:
5845 case R_PPC64_ADDR16_HIGHESTA:
5846 case R_PPC64_ADDR16_LO:
5847 case R_PPC64_ADDR16_LO_DS:
5848 if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1
5849 && rel->r_addend == 0)
5850 {
5851 /* We may need a .plt entry if this reloc refers to a
5852 function in a shared lib. */
5853 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5854 return FALSE;
5855 h->pointer_equality_needed = 1;
5856 }
5857 /* Fall through. */
5858
5859 case R_PPC64_REL30:
5860 case R_PPC64_REL32:
5861 case R_PPC64_REL64:
5862 case R_PPC64_ADDR32:
5863 case R_PPC64_UADDR16:
5864 case R_PPC64_UADDR32:
5865 case R_PPC64_UADDR64:
5866 case R_PPC64_TOC:
5867 if (h != NULL && !bfd_link_pic (info))
5868 /* We may need a copy reloc. */
5869 h->non_got_ref = 1;
5870
5871 /* Don't propagate .opd relocs. */
5872 if (NO_OPD_RELOCS && opd_sym_map != NULL)
5873 break;
5874
5875 /* If we are creating a shared library, and this is a reloc
5876 against a global symbol, or a non PC relative reloc
5877 against a local symbol, then we need to copy the reloc
5878 into the shared library. However, if we are linking with
5879 -Bsymbolic, we do not need to copy a reloc against a
5880 global symbol which is defined in an object we are
5881 including in the link (i.e., DEF_REGULAR is set). At
5882 this point we have not seen all the input files, so it is
5883 possible that DEF_REGULAR is not set now but will be set
5884 later (it is never cleared). In case of a weak definition,
5885 DEF_REGULAR may be cleared later by a strong definition in
5886 a shared library. We account for that possibility below by
5887 storing information in the dyn_relocs field of the hash
5888 table entry. A similar situation occurs when creating
5889 shared libraries and symbol visibility changes render the
5890 symbol local.
5891
5892 If on the other hand, we are creating an executable, we
5893 may need to keep relocations for symbols satisfied by a
5894 dynamic library if we manage to avoid copy relocs for the
5895 symbol. */
5896 dodyn:
5897 if ((bfd_link_pic (info)
5898 && (must_be_dyn_reloc (info, r_type)
5899 || (h != NULL
5900 && (!SYMBOLIC_BIND (info, h)
5901 || h->root.type == bfd_link_hash_defweak
5902 || !h->def_regular))))
5903 || (ELIMINATE_COPY_RELOCS
5904 && !bfd_link_pic (info)
5905 && h != NULL
5906 && (h->root.type == bfd_link_hash_defweak
5907 || !h->def_regular))
5908 || (!bfd_link_pic (info)
5909 && ifunc != NULL))
5910 {
5911 /* We must copy these reloc types into the output file.
5912 Create a reloc section in dynobj and make room for
5913 this reloc. */
5914 if (sreloc == NULL)
5915 {
5916 sreloc = _bfd_elf_make_dynamic_reloc_section
5917 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
5918
5919 if (sreloc == NULL)
5920 return FALSE;
5921 }
5922
5923 /* If this is a global symbol, we count the number of
5924 relocations we need for this symbol. */
5925 if (h != NULL)
5926 {
5927 struct elf_dyn_relocs *p;
5928 struct elf_dyn_relocs **head;
5929
5930 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
5931 p = *head;
5932 if (p == NULL || p->sec != sec)
5933 {
5934 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5935 if (p == NULL)
5936 return FALSE;
5937 p->next = *head;
5938 *head = p;
5939 p->sec = sec;
5940 p->count = 0;
5941 p->pc_count = 0;
5942 }
5943 p->count += 1;
5944 if (!must_be_dyn_reloc (info, r_type))
5945 p->pc_count += 1;
5946 }
5947 else
5948 {
5949 /* Track dynamic relocs needed for local syms too.
5950 We really need local syms available to do this
5951 easily. Oh well. */
5952 struct ppc_dyn_relocs *p;
5953 struct ppc_dyn_relocs **head;
5954 bfd_boolean is_ifunc;
5955 asection *s;
5956 void *vpp;
5957 Elf_Internal_Sym *isym;
5958
5959 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5960 abfd, r_symndx);
5961 if (isym == NULL)
5962 return FALSE;
5963
5964 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5965 if (s == NULL)
5966 s = sec;
5967
5968 vpp = &elf_section_data (s)->local_dynrel;
5969 head = (struct ppc_dyn_relocs **) vpp;
5970 is_ifunc = ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC;
5971 p = *head;
5972 if (p != NULL && p->sec == sec && p->ifunc != is_ifunc)
5973 p = p->next;
5974 if (p == NULL || p->sec != sec || p->ifunc != is_ifunc)
5975 {
5976 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5977 if (p == NULL)
5978 return FALSE;
5979 p->next = *head;
5980 *head = p;
5981 p->sec = sec;
5982 p->ifunc = is_ifunc;
5983 p->count = 0;
5984 }
5985 p->count += 1;
5986 }
5987 }
5988 break;
5989
5990 default:
5991 break;
5992 }
5993 }
5994
5995 return TRUE;
5996 }
5997
5998 /* Merge backend specific data from an object file to the output
5999 object file when linking. */
6000
6001 static bfd_boolean
6002 ppc64_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
6003 {
6004 unsigned long iflags, oflags;
6005
6006 if ((ibfd->flags & BFD_LINKER_CREATED) != 0)
6007 return TRUE;
6008
6009 if (!is_ppc64_elf (ibfd) || !is_ppc64_elf (obfd))
6010 return TRUE;
6011
6012 if (!_bfd_generic_verify_endian_match (ibfd, obfd))
6013 return FALSE;
6014
6015 iflags = elf_elfheader (ibfd)->e_flags;
6016 oflags = elf_elfheader (obfd)->e_flags;
6017
6018 if (iflags & ~EF_PPC64_ABI)
6019 {
6020 _bfd_error_handler
6021 (_("%B uses unknown e_flags 0x%lx"), ibfd, iflags);
6022 bfd_set_error (bfd_error_bad_value);
6023 return FALSE;
6024 }
6025 else if (iflags != oflags && iflags != 0)
6026 {
6027 _bfd_error_handler
6028 (_("%B: ABI version %ld is not compatible with ABI version %ld output"),
6029 ibfd, iflags, oflags);
6030 bfd_set_error (bfd_error_bad_value);
6031 return FALSE;
6032 }
6033
6034 _bfd_elf_ppc_merge_fp_attributes (ibfd, obfd);
6035
6036 /* Merge Tag_compatibility attributes and any common GNU ones. */
6037 _bfd_elf_merge_object_attributes (ibfd, obfd);
6038
6039 return TRUE;
6040 }
6041
6042 static bfd_boolean
6043 ppc64_elf_print_private_bfd_data (bfd *abfd, void *ptr)
6044 {
6045 /* Print normal ELF private data. */
6046 _bfd_elf_print_private_bfd_data (abfd, ptr);
6047
6048 if (elf_elfheader (abfd)->e_flags != 0)
6049 {
6050 FILE *file = ptr;
6051
6052 /* xgettext:c-format */
6053 fprintf (file, _("private flags = 0x%lx:"),
6054 elf_elfheader (abfd)->e_flags);
6055
6056 if ((elf_elfheader (abfd)->e_flags & EF_PPC64_ABI) != 0)
6057 fprintf (file, _(" [abiv%ld]"),
6058 elf_elfheader (abfd)->e_flags & EF_PPC64_ABI);
6059 fputc ('\n', file);
6060 }
6061
6062 return TRUE;
6063 }
6064
6065 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
6066 of the code entry point, and its section, which must be in the same
6067 object as OPD_SEC. Returns (bfd_vma) -1 on error. */
6068
6069 static bfd_vma
6070 opd_entry_value (asection *opd_sec,
6071 bfd_vma offset,
6072 asection **code_sec,
6073 bfd_vma *code_off,
6074 bfd_boolean in_code_sec)
6075 {
6076 bfd *opd_bfd = opd_sec->owner;
6077 Elf_Internal_Rela *relocs;
6078 Elf_Internal_Rela *lo, *hi, *look;
6079 bfd_vma val;
6080
6081 /* No relocs implies we are linking a --just-symbols object, or looking
6082 at a final linked executable with addr2line or somesuch. */
6083 if (opd_sec->reloc_count == 0)
6084 {
6085 bfd_byte *contents = ppc64_elf_tdata (opd_bfd)->opd.contents;
6086
6087 if (contents == NULL)
6088 {
6089 if (!bfd_malloc_and_get_section (opd_bfd, opd_sec, &contents))
6090 return (bfd_vma) -1;
6091 ppc64_elf_tdata (opd_bfd)->opd.contents = contents;
6092 }
6093
6094 /* PR 17512: file: 64b9dfbb. */
6095 if (offset + 7 >= opd_sec->size || offset + 7 < offset)
6096 return (bfd_vma) -1;
6097
6098 val = bfd_get_64 (opd_bfd, contents + offset);
6099 if (code_sec != NULL)
6100 {
6101 asection *sec, *likely = NULL;
6102
6103 if (in_code_sec)
6104 {
6105 sec = *code_sec;
6106 if (sec->vma <= val
6107 && val < sec->vma + sec->size)
6108 likely = sec;
6109 else
6110 val = -1;
6111 }
6112 else
6113 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
6114 if (sec->vma <= val
6115 && (sec->flags & SEC_LOAD) != 0
6116 && (sec->flags & SEC_ALLOC) != 0)
6117 likely = sec;
6118 if (likely != NULL)
6119 {
6120 *code_sec = likely;
6121 if (code_off != NULL)
6122 *code_off = val - likely->vma;
6123 }
6124 }
6125 return val;
6126 }
6127
6128 BFD_ASSERT (is_ppc64_elf (opd_bfd));
6129
6130 relocs = ppc64_elf_tdata (opd_bfd)->opd.relocs;
6131 if (relocs == NULL)
6132 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
6133 /* PR 17512: file: df8e1fd6. */
6134 if (relocs == NULL)
6135 return (bfd_vma) -1;
6136
6137 /* Go find the opd reloc at the sym address. */
6138 lo = relocs;
6139 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
6140 val = (bfd_vma) -1;
6141 while (lo < hi)
6142 {
6143 look = lo + (hi - lo) / 2;
6144 if (look->r_offset < offset)
6145 lo = look + 1;
6146 else if (look->r_offset > offset)
6147 hi = look;
6148 else
6149 {
6150 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (opd_bfd);
6151
6152 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
6153 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
6154 {
6155 unsigned long symndx = ELF64_R_SYM (look->r_info);
6156 asection *sec = NULL;
6157
6158 if (symndx >= symtab_hdr->sh_info
6159 && elf_sym_hashes (opd_bfd) != NULL)
6160 {
6161 struct elf_link_hash_entry **sym_hashes;
6162 struct elf_link_hash_entry *rh;
6163
6164 sym_hashes = elf_sym_hashes (opd_bfd);
6165 rh = sym_hashes[symndx - symtab_hdr->sh_info];
6166 if (rh != NULL)
6167 {
6168 rh = elf_follow_link (rh);
6169 if (rh->root.type != bfd_link_hash_defined
6170 && rh->root.type != bfd_link_hash_defweak)
6171 break;
6172 if (rh->root.u.def.section->owner == opd_bfd)
6173 {
6174 val = rh->root.u.def.value;
6175 sec = rh->root.u.def.section;
6176 }
6177 }
6178 }
6179
6180 if (sec == NULL)
6181 {
6182 Elf_Internal_Sym *sym;
6183
6184 if (symndx < symtab_hdr->sh_info)
6185 {
6186 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
6187 if (sym == NULL)
6188 {
6189 size_t symcnt = symtab_hdr->sh_info;
6190 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
6191 symcnt, 0,
6192 NULL, NULL, NULL);
6193 if (sym == NULL)
6194 break;
6195 symtab_hdr->contents = (bfd_byte *) sym;
6196 }
6197 sym += symndx;
6198 }
6199 else
6200 {
6201 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
6202 1, symndx,
6203 NULL, NULL, NULL);
6204 if (sym == NULL)
6205 break;
6206 }
6207 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
6208 if (sec == NULL)
6209 break;
6210 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
6211 val = sym->st_value;
6212 }
6213
6214 val += look->r_addend;
6215 if (code_off != NULL)
6216 *code_off = val;
6217 if (code_sec != NULL)
6218 {
6219 if (in_code_sec && *code_sec != sec)
6220 return -1;
6221 else
6222 *code_sec = sec;
6223 }
6224 if (sec->output_section != NULL)
6225 val += sec->output_section->vma + sec->output_offset;
6226 }
6227 break;
6228 }
6229 }
6230
6231 return val;
6232 }
6233
6234 /* If the ELF symbol SYM might be a function in SEC, return the
6235 function size and set *CODE_OFF to the function's entry point,
6236 otherwise return zero. */
6237
6238 static bfd_size_type
6239 ppc64_elf_maybe_function_sym (const asymbol *sym, asection *sec,
6240 bfd_vma *code_off)
6241 {
6242 bfd_size_type size;
6243
6244 if ((sym->flags & (BSF_SECTION_SYM | BSF_FILE | BSF_OBJECT
6245 | BSF_THREAD_LOCAL | BSF_RELC | BSF_SRELC)) != 0)
6246 return 0;
6247
6248 size = 0;
6249 if (!(sym->flags & BSF_SYNTHETIC))
6250 size = ((elf_symbol_type *) sym)->internal_elf_sym.st_size;
6251
6252 if (strcmp (sym->section->name, ".opd") == 0)
6253 {
6254 struct _opd_sec_data *opd = get_opd_info (sym->section);
6255 bfd_vma symval = sym->value;
6256
6257 if (opd != NULL
6258 && opd->adjust != NULL
6259 && elf_section_data (sym->section)->relocs != NULL)
6260 {
6261 /* opd_entry_value will use cached relocs that have been
6262 adjusted, but with raw symbols. That means both local
6263 and global symbols need adjusting. */
6264 long adjust = opd->adjust[OPD_NDX (symval)];
6265 if (adjust == -1)
6266 return 0;
6267 symval += adjust;
6268 }
6269
6270 if (opd_entry_value (sym->section, symval,
6271 &sec, code_off, TRUE) == (bfd_vma) -1)
6272 return 0;
6273 /* An old ABI binary with dot-syms has a size of 24 on the .opd
6274 symbol. This size has nothing to do with the code size of the
6275 function, which is what we're supposed to return, but the
6276 code size isn't available without looking up the dot-sym.
6277 However, doing that would be a waste of time particularly
6278 since elf_find_function will look at the dot-sym anyway.
6279 Now, elf_find_function will keep the largest size of any
6280 function sym found at the code address of interest, so return
6281 1 here to avoid it incorrectly caching a larger function size
6282 for a small function. This does mean we return the wrong
6283 size for a new-ABI function of size 24, but all that does is
6284 disable caching for such functions. */
6285 if (size == 24)
6286 size = 1;
6287 }
6288 else
6289 {
6290 if (sym->section != sec)
6291 return 0;
6292 *code_off = sym->value;
6293 }
6294 if (size == 0)
6295 size = 1;
6296 return size;
6297 }
6298
6299 /* Return true if symbol is defined in a regular object file. */
6300
6301 static bfd_boolean
6302 is_static_defined (struct elf_link_hash_entry *h)
6303 {
6304 return ((h->root.type == bfd_link_hash_defined
6305 || h->root.type == bfd_link_hash_defweak)
6306 && h->root.u.def.section != NULL
6307 && h->root.u.def.section->output_section != NULL);
6308 }
6309
6310 /* If FDH is a function descriptor symbol, return the associated code
6311 entry symbol if it is defined. Return NULL otherwise. */
6312
6313 static struct ppc_link_hash_entry *
6314 defined_code_entry (struct ppc_link_hash_entry *fdh)
6315 {
6316 if (fdh->is_func_descriptor)
6317 {
6318 struct ppc_link_hash_entry *fh = ppc_follow_link (fdh->oh);
6319 if (fh->elf.root.type == bfd_link_hash_defined
6320 || fh->elf.root.type == bfd_link_hash_defweak)
6321 return fh;
6322 }
6323 return NULL;
6324 }
6325
6326 /* If FH is a function code entry symbol, return the associated
6327 function descriptor symbol if it is defined. Return NULL otherwise. */
6328
6329 static struct ppc_link_hash_entry *
6330 defined_func_desc (struct ppc_link_hash_entry *fh)
6331 {
6332 if (fh->oh != NULL
6333 && fh->oh->is_func_descriptor)
6334 {
6335 struct ppc_link_hash_entry *fdh = ppc_follow_link (fh->oh);
6336 if (fdh->elf.root.type == bfd_link_hash_defined
6337 || fdh->elf.root.type == bfd_link_hash_defweak)
6338 return fdh;
6339 }
6340 return NULL;
6341 }
6342
6343 /* Mark all our entry sym sections, both opd and code section. */
6344
6345 static void
6346 ppc64_elf_gc_keep (struct bfd_link_info *info)
6347 {
6348 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6349 struct bfd_sym_chain *sym;
6350
6351 if (htab == NULL)
6352 return;
6353
6354 for (sym = info->gc_sym_list; sym != NULL; sym = sym->next)
6355 {
6356 struct ppc_link_hash_entry *eh, *fh;
6357 asection *sec;
6358
6359 eh = (struct ppc_link_hash_entry *)
6360 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, TRUE);
6361 if (eh == NULL)
6362 continue;
6363 if (eh->elf.root.type != bfd_link_hash_defined
6364 && eh->elf.root.type != bfd_link_hash_defweak)
6365 continue;
6366
6367 fh = defined_code_entry (eh);
6368 if (fh != NULL)
6369 {
6370 sec = fh->elf.root.u.def.section;
6371 sec->flags |= SEC_KEEP;
6372 }
6373 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6374 && opd_entry_value (eh->elf.root.u.def.section,
6375 eh->elf.root.u.def.value,
6376 &sec, NULL, FALSE) != (bfd_vma) -1)
6377 sec->flags |= SEC_KEEP;
6378
6379 sec = eh->elf.root.u.def.section;
6380 sec->flags |= SEC_KEEP;
6381 }
6382 }
6383
6384 /* Mark sections containing dynamically referenced symbols. When
6385 building shared libraries, we must assume that any visible symbol is
6386 referenced. */
6387
6388 static bfd_boolean
6389 ppc64_elf_gc_mark_dynamic_ref (struct elf_link_hash_entry *h, void *inf)
6390 {
6391 struct bfd_link_info *info = (struct bfd_link_info *) inf;
6392 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
6393 struct ppc_link_hash_entry *fdh;
6394 struct bfd_elf_dynamic_list *d = info->dynamic_list;
6395
6396 /* Dynamic linking info is on the func descriptor sym. */
6397 fdh = defined_func_desc (eh);
6398 if (fdh != NULL)
6399 eh = fdh;
6400
6401 if ((eh->elf.root.type == bfd_link_hash_defined
6402 || eh->elf.root.type == bfd_link_hash_defweak)
6403 && (eh->elf.ref_dynamic
6404 || ((eh->elf.def_regular || ELF_COMMON_DEF_P (&eh->elf))
6405 && ELF_ST_VISIBILITY (eh->elf.other) != STV_INTERNAL
6406 && ELF_ST_VISIBILITY (eh->elf.other) != STV_HIDDEN
6407 && (!bfd_link_executable (info)
6408 || info->export_dynamic
6409 || (eh->elf.dynamic
6410 && d != NULL
6411 && (*d->match) (&d->head, NULL, eh->elf.root.root.string)))
6412 && (strchr (eh->elf.root.root.string, ELF_VER_CHR) != NULL
6413 || !bfd_hide_sym_by_version (info->version_info,
6414 eh->elf.root.root.string)))))
6415 {
6416 asection *code_sec;
6417 struct ppc_link_hash_entry *fh;
6418
6419 eh->elf.root.u.def.section->flags |= SEC_KEEP;
6420
6421 /* Function descriptor syms cause the associated
6422 function code sym section to be marked. */
6423 fh = defined_code_entry (eh);
6424 if (fh != NULL)
6425 {
6426 code_sec = fh->elf.root.u.def.section;
6427 code_sec->flags |= SEC_KEEP;
6428 }
6429 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6430 && opd_entry_value (eh->elf.root.u.def.section,
6431 eh->elf.root.u.def.value,
6432 &code_sec, NULL, FALSE) != (bfd_vma) -1)
6433 code_sec->flags |= SEC_KEEP;
6434 }
6435
6436 return TRUE;
6437 }
6438
6439 /* Return the section that should be marked against GC for a given
6440 relocation. */
6441
6442 static asection *
6443 ppc64_elf_gc_mark_hook (asection *sec,
6444 struct bfd_link_info *info,
6445 Elf_Internal_Rela *rel,
6446 struct elf_link_hash_entry *h,
6447 Elf_Internal_Sym *sym)
6448 {
6449 asection *rsec;
6450
6451 /* Syms return NULL if we're marking .opd, so we avoid marking all
6452 function sections, as all functions are referenced in .opd. */
6453 rsec = NULL;
6454 if (get_opd_info (sec) != NULL)
6455 return rsec;
6456
6457 if (h != NULL)
6458 {
6459 enum elf_ppc64_reloc_type r_type;
6460 struct ppc_link_hash_entry *eh, *fh, *fdh;
6461
6462 r_type = ELF64_R_TYPE (rel->r_info);
6463 switch (r_type)
6464 {
6465 case R_PPC64_GNU_VTINHERIT:
6466 case R_PPC64_GNU_VTENTRY:
6467 break;
6468
6469 default:
6470 switch (h->root.type)
6471 {
6472 case bfd_link_hash_defined:
6473 case bfd_link_hash_defweak:
6474 eh = (struct ppc_link_hash_entry *) h;
6475 fdh = defined_func_desc (eh);
6476 if (fdh != NULL)
6477 eh = fdh;
6478
6479 /* Function descriptor syms cause the associated
6480 function code sym section to be marked. */
6481 fh = defined_code_entry (eh);
6482 if (fh != NULL)
6483 {
6484 /* They also mark their opd section. */
6485 eh->elf.root.u.def.section->gc_mark = 1;
6486
6487 rsec = fh->elf.root.u.def.section;
6488 }
6489 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6490 && opd_entry_value (eh->elf.root.u.def.section,
6491 eh->elf.root.u.def.value,
6492 &rsec, NULL, FALSE) != (bfd_vma) -1)
6493 eh->elf.root.u.def.section->gc_mark = 1;
6494 else
6495 rsec = h->root.u.def.section;
6496 break;
6497
6498 case bfd_link_hash_common:
6499 rsec = h->root.u.c.p->section;
6500 break;
6501
6502 default:
6503 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
6504 }
6505 }
6506 }
6507 else
6508 {
6509 struct _opd_sec_data *opd;
6510
6511 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
6512 opd = get_opd_info (rsec);
6513 if (opd != NULL && opd->func_sec != NULL)
6514 {
6515 rsec->gc_mark = 1;
6516
6517 rsec = opd->func_sec[OPD_NDX (sym->st_value + rel->r_addend)];
6518 }
6519 }
6520
6521 return rsec;
6522 }
6523
6524 /* Update the .got, .plt. and dynamic reloc reference counts for the
6525 section being removed. */
6526
6527 static bfd_boolean
6528 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
6529 asection *sec, const Elf_Internal_Rela *relocs)
6530 {
6531 struct ppc_link_hash_table *htab;
6532 Elf_Internal_Shdr *symtab_hdr;
6533 struct elf_link_hash_entry **sym_hashes;
6534 struct got_entry **local_got_ents;
6535 const Elf_Internal_Rela *rel, *relend;
6536
6537 if (bfd_link_relocatable (info))
6538 return TRUE;
6539
6540 if ((sec->flags & SEC_ALLOC) == 0)
6541 return TRUE;
6542
6543 elf_section_data (sec)->local_dynrel = NULL;
6544
6545 htab = ppc_hash_table (info);
6546 if (htab == NULL)
6547 return FALSE;
6548
6549 symtab_hdr = &elf_symtab_hdr (abfd);
6550 sym_hashes = elf_sym_hashes (abfd);
6551 local_got_ents = elf_local_got_ents (abfd);
6552
6553 relend = relocs + sec->reloc_count;
6554 for (rel = relocs; rel < relend; rel++)
6555 {
6556 unsigned long r_symndx;
6557 enum elf_ppc64_reloc_type r_type;
6558 struct elf_link_hash_entry *h = NULL;
6559 struct plt_entry **plt_list;
6560 unsigned char tls_type = 0;
6561
6562 r_symndx = ELF64_R_SYM (rel->r_info);
6563 r_type = ELF64_R_TYPE (rel->r_info);
6564 if (r_symndx >= symtab_hdr->sh_info)
6565 {
6566 struct ppc_link_hash_entry *eh;
6567 struct elf_dyn_relocs **pp;
6568 struct elf_dyn_relocs *p;
6569
6570 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
6571 h = elf_follow_link (h);
6572 eh = (struct ppc_link_hash_entry *) h;
6573
6574 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
6575 if (p->sec == sec)
6576 {
6577 /* Everything must go for SEC. */
6578 *pp = p->next;
6579 break;
6580 }
6581 }
6582
6583 switch (r_type)
6584 {
6585 case R_PPC64_GOT_TLSLD16:
6586 case R_PPC64_GOT_TLSLD16_LO:
6587 case R_PPC64_GOT_TLSLD16_HI:
6588 case R_PPC64_GOT_TLSLD16_HA:
6589 tls_type = TLS_TLS | TLS_LD;
6590 goto dogot;
6591
6592 case R_PPC64_GOT_TLSGD16:
6593 case R_PPC64_GOT_TLSGD16_LO:
6594 case R_PPC64_GOT_TLSGD16_HI:
6595 case R_PPC64_GOT_TLSGD16_HA:
6596 tls_type = TLS_TLS | TLS_GD;
6597 goto dogot;
6598
6599 case R_PPC64_GOT_TPREL16_DS:
6600 case R_PPC64_GOT_TPREL16_LO_DS:
6601 case R_PPC64_GOT_TPREL16_HI:
6602 case R_PPC64_GOT_TPREL16_HA:
6603 tls_type = TLS_TLS | TLS_TPREL;
6604 goto dogot;
6605
6606 case R_PPC64_GOT_DTPREL16_DS:
6607 case R_PPC64_GOT_DTPREL16_LO_DS:
6608 case R_PPC64_GOT_DTPREL16_HI:
6609 case R_PPC64_GOT_DTPREL16_HA:
6610 tls_type = TLS_TLS | TLS_DTPREL;
6611 goto dogot;
6612
6613 case R_PPC64_GOT16:
6614 case R_PPC64_GOT16_DS:
6615 case R_PPC64_GOT16_HA:
6616 case R_PPC64_GOT16_HI:
6617 case R_PPC64_GOT16_LO:
6618 case R_PPC64_GOT16_LO_DS:
6619 dogot:
6620 {
6621 struct got_entry *ent;
6622
6623 if (h != NULL)
6624 ent = h->got.glist;
6625 else
6626 ent = local_got_ents[r_symndx];
6627
6628 for (; ent != NULL; ent = ent->next)
6629 if (ent->addend == rel->r_addend
6630 && ent->owner == abfd
6631 && ent->tls_type == tls_type)
6632 break;
6633 if (ent == NULL)
6634 abort ();
6635 if (ent->got.refcount > 0)
6636 ent->got.refcount -= 1;
6637 }
6638 break;
6639
6640 case R_PPC64_PLT16_HA:
6641 case R_PPC64_PLT16_HI:
6642 case R_PPC64_PLT16_LO:
6643 case R_PPC64_PLT32:
6644 case R_PPC64_PLT64:
6645 case R_PPC64_REL14:
6646 case R_PPC64_REL14_BRNTAKEN:
6647 case R_PPC64_REL14_BRTAKEN:
6648 case R_PPC64_REL24:
6649 plt_list = NULL;
6650 if (h != NULL)
6651 plt_list = &h->plt.plist;
6652 else if (local_got_ents != NULL)
6653 {
6654 struct plt_entry **local_plt = (struct plt_entry **)
6655 (local_got_ents + symtab_hdr->sh_info);
6656 unsigned char *local_got_tls_masks = (unsigned char *)
6657 (local_plt + symtab_hdr->sh_info);
6658 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
6659 plt_list = local_plt + r_symndx;
6660 }
6661 if (plt_list)
6662 {
6663 struct plt_entry *ent;
6664
6665 for (ent = *plt_list; ent != NULL; ent = ent->next)
6666 if (ent->addend == rel->r_addend)
6667 break;
6668 if (ent != NULL && ent->plt.refcount > 0)
6669 ent->plt.refcount -= 1;
6670 }
6671 break;
6672
6673 default:
6674 break;
6675 }
6676 }
6677 return TRUE;
6678 }
6679
6680 /* The maximum size of .sfpr. */
6681 #define SFPR_MAX (218*4)
6682
6683 struct sfpr_def_parms
6684 {
6685 const char name[12];
6686 unsigned char lo, hi;
6687 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
6688 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
6689 };
6690
6691 /* Auto-generate _save*, _rest* functions in .sfpr.
6692 If STUB_SEC is non-null, define alias symbols in STUB_SEC
6693 instead. */
6694
6695 static bfd_boolean
6696 sfpr_define (struct bfd_link_info *info,
6697 const struct sfpr_def_parms *parm,
6698 asection *stub_sec)
6699 {
6700 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6701 unsigned int i;
6702 size_t len = strlen (parm->name);
6703 bfd_boolean writing = FALSE;
6704 char sym[16];
6705
6706 if (htab == NULL)
6707 return FALSE;
6708
6709 memcpy (sym, parm->name, len);
6710 sym[len + 2] = 0;
6711
6712 for (i = parm->lo; i <= parm->hi; i++)
6713 {
6714 struct ppc_link_hash_entry *h;
6715
6716 sym[len + 0] = i / 10 + '0';
6717 sym[len + 1] = i % 10 + '0';
6718 h = (struct ppc_link_hash_entry *)
6719 elf_link_hash_lookup (&htab->elf, sym, writing, TRUE, TRUE);
6720 if (stub_sec != NULL)
6721 {
6722 if (h != NULL
6723 && h->elf.root.type == bfd_link_hash_defined
6724 && h->elf.root.u.def.section == htab->sfpr)
6725 {
6726 struct elf_link_hash_entry *s;
6727 char buf[32];
6728 sprintf (buf, "%08x.%s", stub_sec->id & 0xffffffff, sym);
6729 s = elf_link_hash_lookup (&htab->elf, buf, TRUE, TRUE, FALSE);
6730 if (s == NULL)
6731 return FALSE;
6732 if (s->root.type == bfd_link_hash_new
6733 || (s->root.type = bfd_link_hash_defined
6734 && s->root.u.def.section == stub_sec))
6735 {
6736 s->root.type = bfd_link_hash_defined;
6737 s->root.u.def.section = stub_sec;
6738 s->root.u.def.value = (stub_sec->size
6739 + h->elf.root.u.def.value);
6740 s->ref_regular = 1;
6741 s->def_regular = 1;
6742 s->ref_regular_nonweak = 1;
6743 s->forced_local = 1;
6744 s->non_elf = 0;
6745 s->root.linker_def = 1;
6746 }
6747 }
6748 continue;
6749 }
6750 if (h != NULL)
6751 {
6752 h->save_res = 1;
6753 if (!h->elf.def_regular)
6754 {
6755 h->elf.root.type = bfd_link_hash_defined;
6756 h->elf.root.u.def.section = htab->sfpr;
6757 h->elf.root.u.def.value = htab->sfpr->size;
6758 h->elf.type = STT_FUNC;
6759 h->elf.def_regular = 1;
6760 h->elf.non_elf = 0;
6761 _bfd_elf_link_hash_hide_symbol (info, &h->elf, TRUE);
6762 writing = TRUE;
6763 if (htab->sfpr->contents == NULL)
6764 {
6765 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
6766 if (htab->sfpr->contents == NULL)
6767 return FALSE;
6768 }
6769 }
6770 }
6771 if (writing)
6772 {
6773 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
6774 if (i != parm->hi)
6775 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
6776 else
6777 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
6778 htab->sfpr->size = p - htab->sfpr->contents;
6779 }
6780 }
6781
6782 return TRUE;
6783 }
6784
6785 static bfd_byte *
6786 savegpr0 (bfd *abfd, bfd_byte *p, int r)
6787 {
6788 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6789 return p + 4;
6790 }
6791
6792 static bfd_byte *
6793 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
6794 {
6795 p = savegpr0 (abfd, p, r);
6796 bfd_put_32 (abfd, STD_R0_0R1 + STK_LR, p);
6797 p = p + 4;
6798 bfd_put_32 (abfd, BLR, p);
6799 return p + 4;
6800 }
6801
6802 static bfd_byte *
6803 restgpr0 (bfd *abfd, bfd_byte *p, int r)
6804 {
6805 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6806 return p + 4;
6807 }
6808
6809 static bfd_byte *
6810 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
6811 {
6812 bfd_put_32 (abfd, LD_R0_0R1 + STK_LR, p);
6813 p = p + 4;
6814 p = restgpr0 (abfd, p, r);
6815 bfd_put_32 (abfd, MTLR_R0, p);
6816 p = p + 4;
6817 if (r == 29)
6818 {
6819 p = restgpr0 (abfd, p, 30);
6820 p = restgpr0 (abfd, p, 31);
6821 }
6822 bfd_put_32 (abfd, BLR, p);
6823 return p + 4;
6824 }
6825
6826 static bfd_byte *
6827 savegpr1 (bfd *abfd, bfd_byte *p, int r)
6828 {
6829 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6830 return p + 4;
6831 }
6832
6833 static bfd_byte *
6834 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
6835 {
6836 p = savegpr1 (abfd, p, r);
6837 bfd_put_32 (abfd, BLR, p);
6838 return p + 4;
6839 }
6840
6841 static bfd_byte *
6842 restgpr1 (bfd *abfd, bfd_byte *p, int r)
6843 {
6844 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6845 return p + 4;
6846 }
6847
6848 static bfd_byte *
6849 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
6850 {
6851 p = restgpr1 (abfd, p, r);
6852 bfd_put_32 (abfd, BLR, p);
6853 return p + 4;
6854 }
6855
6856 static bfd_byte *
6857 savefpr (bfd *abfd, bfd_byte *p, int r)
6858 {
6859 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6860 return p + 4;
6861 }
6862
6863 static bfd_byte *
6864 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
6865 {
6866 p = savefpr (abfd, p, r);
6867 bfd_put_32 (abfd, STD_R0_0R1 + STK_LR, p);
6868 p = p + 4;
6869 bfd_put_32 (abfd, BLR, p);
6870 return p + 4;
6871 }
6872
6873 static bfd_byte *
6874 restfpr (bfd *abfd, bfd_byte *p, int r)
6875 {
6876 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6877 return p + 4;
6878 }
6879
6880 static bfd_byte *
6881 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
6882 {
6883 bfd_put_32 (abfd, LD_R0_0R1 + STK_LR, p);
6884 p = p + 4;
6885 p = restfpr (abfd, p, r);
6886 bfd_put_32 (abfd, MTLR_R0, p);
6887 p = p + 4;
6888 if (r == 29)
6889 {
6890 p = restfpr (abfd, p, 30);
6891 p = restfpr (abfd, p, 31);
6892 }
6893 bfd_put_32 (abfd, BLR, p);
6894 return p + 4;
6895 }
6896
6897 static bfd_byte *
6898 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
6899 {
6900 p = savefpr (abfd, p, r);
6901 bfd_put_32 (abfd, BLR, p);
6902 return p + 4;
6903 }
6904
6905 static bfd_byte *
6906 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
6907 {
6908 p = restfpr (abfd, p, r);
6909 bfd_put_32 (abfd, BLR, p);
6910 return p + 4;
6911 }
6912
6913 static bfd_byte *
6914 savevr (bfd *abfd, bfd_byte *p, int r)
6915 {
6916 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6917 p = p + 4;
6918 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
6919 return p + 4;
6920 }
6921
6922 static bfd_byte *
6923 savevr_tail (bfd *abfd, bfd_byte *p, int r)
6924 {
6925 p = savevr (abfd, p, r);
6926 bfd_put_32 (abfd, BLR, p);
6927 return p + 4;
6928 }
6929
6930 static bfd_byte *
6931 restvr (bfd *abfd, bfd_byte *p, int r)
6932 {
6933 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6934 p = p + 4;
6935 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
6936 return p + 4;
6937 }
6938
6939 static bfd_byte *
6940 restvr_tail (bfd *abfd, bfd_byte *p, int r)
6941 {
6942 p = restvr (abfd, p, r);
6943 bfd_put_32 (abfd, BLR, p);
6944 return p + 4;
6945 }
6946
6947 /* Called via elf_link_hash_traverse to transfer dynamic linking
6948 information on function code symbol entries to their corresponding
6949 function descriptor symbol entries. */
6950
6951 static bfd_boolean
6952 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
6953 {
6954 struct bfd_link_info *info;
6955 struct ppc_link_hash_table *htab;
6956 struct plt_entry *ent;
6957 struct ppc_link_hash_entry *fh;
6958 struct ppc_link_hash_entry *fdh;
6959 bfd_boolean force_local;
6960
6961 fh = (struct ppc_link_hash_entry *) h;
6962 if (fh->elf.root.type == bfd_link_hash_indirect)
6963 return TRUE;
6964
6965 info = inf;
6966 htab = ppc_hash_table (info);
6967 if (htab == NULL)
6968 return FALSE;
6969
6970 /* Resolve undefined references to dot-symbols as the value
6971 in the function descriptor, if we have one in a regular object.
6972 This is to satisfy cases like ".quad .foo". Calls to functions
6973 in dynamic objects are handled elsewhere. */
6974 if (fh->elf.root.type == bfd_link_hash_undefweak
6975 && fh->was_undefined
6976 && (fdh = defined_func_desc (fh)) != NULL
6977 && get_opd_info (fdh->elf.root.u.def.section) != NULL
6978 && opd_entry_value (fdh->elf.root.u.def.section,
6979 fdh->elf.root.u.def.value,
6980 &fh->elf.root.u.def.section,
6981 &fh->elf.root.u.def.value, FALSE) != (bfd_vma) -1)
6982 {
6983 fh->elf.root.type = fdh->elf.root.type;
6984 fh->elf.forced_local = 1;
6985 fh->elf.def_regular = fdh->elf.def_regular;
6986 fh->elf.def_dynamic = fdh->elf.def_dynamic;
6987 }
6988
6989 /* If this is a function code symbol, transfer dynamic linking
6990 information to the function descriptor symbol. */
6991 if (!fh->is_func)
6992 return TRUE;
6993
6994 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
6995 if (ent->plt.refcount > 0)
6996 break;
6997 if (ent == NULL
6998 || fh->elf.root.root.string[0] != '.'
6999 || fh->elf.root.root.string[1] == '\0')
7000 return TRUE;
7001
7002 /* Find the corresponding function descriptor symbol. Create it
7003 as undefined if necessary. */
7004
7005 fdh = lookup_fdh (fh, htab);
7006 if (fdh == NULL
7007 && !bfd_link_executable (info)
7008 && (fh->elf.root.type == bfd_link_hash_undefined
7009 || fh->elf.root.type == bfd_link_hash_undefweak))
7010 {
7011 fdh = make_fdh (info, fh);
7012 if (fdh == NULL)
7013 return FALSE;
7014 }
7015
7016 /* Fake function descriptors are made undefweak. If the function
7017 code symbol is strong undefined, make the fake sym the same.
7018 If the function code symbol is defined, then force the fake
7019 descriptor local; We can't support overriding of symbols in a
7020 shared library on a fake descriptor. */
7021
7022 if (fdh != NULL
7023 && fdh->fake
7024 && fdh->elf.root.type == bfd_link_hash_undefweak)
7025 {
7026 if (fh->elf.root.type == bfd_link_hash_undefined)
7027 {
7028 fdh->elf.root.type = bfd_link_hash_undefined;
7029 bfd_link_add_undef (&htab->elf.root, &fdh->elf.root);
7030 }
7031 else if (fh->elf.root.type == bfd_link_hash_defined
7032 || fh->elf.root.type == bfd_link_hash_defweak)
7033 {
7034 _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE);
7035 }
7036 }
7037
7038 if (fdh != NULL
7039 && !fdh->elf.forced_local
7040 && (!bfd_link_executable (info)
7041 || fdh->elf.def_dynamic
7042 || fdh->elf.ref_dynamic
7043 || (fdh->elf.root.type == bfd_link_hash_undefweak
7044 && ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT)))
7045 {
7046 if (fdh->elf.dynindx == -1)
7047 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
7048 return FALSE;
7049 fdh->elf.ref_regular |= fh->elf.ref_regular;
7050 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
7051 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
7052 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
7053 if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT)
7054 {
7055 move_plt_plist (fh, fdh);
7056 fdh->elf.needs_plt = 1;
7057 }
7058 fdh->is_func_descriptor = 1;
7059 fdh->oh = fh;
7060 fh->oh = fdh;
7061 }
7062
7063 /* Now that the info is on the function descriptor, clear the
7064 function code sym info. Any function code syms for which we
7065 don't have a definition in a regular file, we force local.
7066 This prevents a shared library from exporting syms that have
7067 been imported from another library. Function code syms that
7068 are really in the library we must leave global to prevent the
7069 linker dragging in a definition from a static library. */
7070 force_local = (!fh->elf.def_regular
7071 || fdh == NULL
7072 || !fdh->elf.def_regular
7073 || fdh->elf.forced_local);
7074 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
7075
7076 return TRUE;
7077 }
7078
7079 static const struct sfpr_def_parms save_res_funcs[] =
7080 {
7081 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
7082 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
7083 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
7084 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
7085 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
7086 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
7087 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
7088 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
7089 { "._savef", 14, 31, savefpr, savefpr1_tail },
7090 { "._restf", 14, 31, restfpr, restfpr1_tail },
7091 { "_savevr_", 20, 31, savevr, savevr_tail },
7092 { "_restvr_", 20, 31, restvr, restvr_tail }
7093 };
7094
7095 /* Called near the start of bfd_elf_size_dynamic_sections. We use
7096 this hook to a) provide some gcc support functions, and b) transfer
7097 dynamic linking information gathered so far on function code symbol
7098 entries, to their corresponding function descriptor symbol entries. */
7099
7100 static bfd_boolean
7101 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
7102 struct bfd_link_info *info)
7103 {
7104 struct ppc_link_hash_table *htab;
7105
7106 htab = ppc_hash_table (info);
7107 if (htab == NULL)
7108 return FALSE;
7109
7110 /* Provide any missing _save* and _rest* functions. */
7111 if (htab->sfpr != NULL)
7112 {
7113 unsigned int i;
7114
7115 htab->sfpr->size = 0;
7116 for (i = 0; i < ARRAY_SIZE (save_res_funcs); i++)
7117 if (!sfpr_define (info, &save_res_funcs[i], NULL))
7118 return FALSE;
7119 if (htab->sfpr->size == 0)
7120 htab->sfpr->flags |= SEC_EXCLUDE;
7121 }
7122
7123 if (bfd_link_relocatable (info))
7124 return TRUE;
7125
7126 if (htab->elf.hgot != NULL)
7127 {
7128 _bfd_elf_link_hash_hide_symbol (info, htab->elf.hgot, TRUE);
7129 /* Make .TOC. defined so as to prevent it being made dynamic.
7130 The wrong value here is fixed later in ppc64_elf_set_toc. */
7131 if (!htab->elf.hgot->def_regular
7132 || htab->elf.hgot->root.type != bfd_link_hash_defined)
7133 {
7134 htab->elf.hgot->root.type = bfd_link_hash_defined;
7135 htab->elf.hgot->root.u.def.value = 0;
7136 htab->elf.hgot->root.u.def.section = bfd_abs_section_ptr;
7137 htab->elf.hgot->def_regular = 1;
7138 htab->elf.hgot->root.linker_def = 1;
7139 }
7140 htab->elf.hgot->type = STT_OBJECT;
7141 htab->elf.hgot->other = ((htab->elf.hgot->other & ~ELF_ST_VISIBILITY (-1))
7142 | STV_HIDDEN);
7143 }
7144
7145 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
7146
7147 return TRUE;
7148 }
7149
7150 /* Return true if we have dynamic relocs against H that apply to
7151 read-only sections. */
7152
7153 static bfd_boolean
7154 readonly_dynrelocs (struct elf_link_hash_entry *h)
7155 {
7156 struct ppc_link_hash_entry *eh;
7157 struct elf_dyn_relocs *p;
7158
7159 eh = (struct ppc_link_hash_entry *) h;
7160 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7161 {
7162 asection *s = p->sec->output_section;
7163
7164 if (s != NULL && (s->flags & SEC_READONLY) != 0)
7165 return TRUE;
7166 }
7167 return FALSE;
7168 }
7169
7170 /* Return true if we have dynamic relocs against H or any of its weak
7171 aliases, that apply to read-only sections. */
7172
7173 static bfd_boolean
7174 alias_readonly_dynrelocs (struct elf_link_hash_entry *h)
7175 {
7176 struct ppc_link_hash_entry *eh;
7177
7178 eh = (struct ppc_link_hash_entry *) h;
7179 do
7180 {
7181 if (readonly_dynrelocs (&eh->elf))
7182 return TRUE;
7183 eh = eh->weakref;
7184 } while (eh != NULL && &eh->elf != h);
7185
7186 return FALSE;
7187 }
7188
7189 /* Return whether EH has pc-relative dynamic relocs. */
7190
7191 static bfd_boolean
7192 pc_dynrelocs (struct ppc_link_hash_entry *eh)
7193 {
7194 struct elf_dyn_relocs *p;
7195
7196 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7197 if (p->pc_count != 0)
7198 return TRUE;
7199 return FALSE;
7200 }
7201
7202 /* Return true if a global entry stub will be created for H. Valid
7203 for ELFv2 before plt entries have been allocated. */
7204
7205 static bfd_boolean
7206 global_entry_stub (struct elf_link_hash_entry *h)
7207 {
7208 struct plt_entry *pent;
7209
7210 if (!h->pointer_equality_needed
7211 || h->def_regular)
7212 return FALSE;
7213
7214 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
7215 if (pent->plt.refcount > 0
7216 && pent->addend == 0)
7217 return TRUE;
7218
7219 return FALSE;
7220 }
7221
7222 /* Adjust a symbol defined by a dynamic object and referenced by a
7223 regular object. The current definition is in some section of the
7224 dynamic object, but we're not including those sections. We have to
7225 change the definition to something the rest of the link can
7226 understand. */
7227
7228 static bfd_boolean
7229 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
7230 struct elf_link_hash_entry *h)
7231 {
7232 struct ppc_link_hash_table *htab;
7233 asection *s;
7234
7235 htab = ppc_hash_table (info);
7236 if (htab == NULL)
7237 return FALSE;
7238
7239 /* Deal with function syms. */
7240 if (h->type == STT_FUNC
7241 || h->type == STT_GNU_IFUNC
7242 || h->needs_plt)
7243 {
7244 /* Clear procedure linkage table information for any symbol that
7245 won't need a .plt entry. */
7246 struct plt_entry *ent;
7247 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
7248 if (ent->plt.refcount > 0)
7249 break;
7250 if (ent == NULL
7251 || (h->type != STT_GNU_IFUNC
7252 && (SYMBOL_CALLS_LOCAL (info, h)
7253 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
7254 && h->root.type == bfd_link_hash_undefweak)))
7255 || ((struct ppc_link_hash_entry *) h)->save_res)
7256 {
7257 h->plt.plist = NULL;
7258 h->needs_plt = 0;
7259 h->pointer_equality_needed = 0;
7260 }
7261 else if (abiversion (info->output_bfd) >= 2)
7262 {
7263 /* Taking a function's address in a read/write section
7264 doesn't require us to define the function symbol in the
7265 executable on a global entry stub. A dynamic reloc can
7266 be used instead. The reason we prefer a few more dynamic
7267 relocs is that calling via a global entry stub costs a
7268 few more instructions, and pointer_equality_needed causes
7269 extra work in ld.so when resolving these symbols. */
7270 if (global_entry_stub (h)
7271 && !alias_readonly_dynrelocs (h))
7272 {
7273 h->pointer_equality_needed = 0;
7274 /* After adjust_dynamic_symbol, non_got_ref set in
7275 the non-pic case means that dyn_relocs for this
7276 symbol should be discarded. */
7277 h->non_got_ref = 0;
7278 }
7279
7280 /* If making a plt entry, then we don't need copy relocs. */
7281 return TRUE;
7282 }
7283 }
7284 else
7285 h->plt.plist = NULL;
7286
7287 /* If this is a weak symbol, and there is a real definition, the
7288 processor independent code will have arranged for us to see the
7289 real definition first, and we can just use the same value. */
7290 if (h->u.weakdef != NULL)
7291 {
7292 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
7293 || h->u.weakdef->root.type == bfd_link_hash_defweak);
7294 h->root.u.def.section = h->u.weakdef->root.u.def.section;
7295 h->root.u.def.value = h->u.weakdef->root.u.def.value;
7296 if (ELIMINATE_COPY_RELOCS)
7297 h->non_got_ref = h->u.weakdef->non_got_ref;
7298 return TRUE;
7299 }
7300
7301 /* If we are creating a shared library, we must presume that the
7302 only references to the symbol are via the global offset table.
7303 For such cases we need not do anything here; the relocations will
7304 be handled correctly by relocate_section. */
7305 if (bfd_link_pic (info))
7306 return TRUE;
7307
7308 /* If there are no references to this symbol that do not use the
7309 GOT, we don't need to generate a copy reloc. */
7310 if (!h->non_got_ref)
7311 return TRUE;
7312
7313 /* Don't generate a copy reloc for symbols defined in the executable. */
7314 if (!h->def_dynamic || !h->ref_regular || h->def_regular
7315
7316 /* If -z nocopyreloc was given, don't generate them either. */
7317 || info->nocopyreloc
7318
7319 /* If we didn't find any dynamic relocs in read-only sections, then
7320 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
7321 || (ELIMINATE_COPY_RELOCS && !alias_readonly_dynrelocs (h))
7322
7323 /* Protected variables do not work with .dynbss. The copy in
7324 .dynbss won't be used by the shared library with the protected
7325 definition for the variable. Text relocations are preferable
7326 to an incorrect program. */
7327 || h->protected_def)
7328 {
7329 h->non_got_ref = 0;
7330 return TRUE;
7331 }
7332
7333 if (h->plt.plist != NULL)
7334 {
7335 /* We should never get here, but unfortunately there are versions
7336 of gcc out there that improperly (for this ABI) put initialized
7337 function pointers, vtable refs and suchlike in read-only
7338 sections. Allow them to proceed, but warn that this might
7339 break at runtime. */
7340 info->callbacks->einfo
7341 (_("%P: copy reloc against `%T' requires lazy plt linking; "
7342 "avoid setting LD_BIND_NOW=1 or upgrade gcc\n"),
7343 h->root.root.string);
7344 }
7345
7346 /* This is a reference to a symbol defined by a dynamic object which
7347 is not a function. */
7348
7349 /* We must allocate the symbol in our .dynbss section, which will
7350 become part of the .bss section of the executable. There will be
7351 an entry for this symbol in the .dynsym section. The dynamic
7352 object will contain position independent code, so all references
7353 from the dynamic object to this symbol will go through the global
7354 offset table. The dynamic linker will use the .dynsym entry to
7355 determine the address it must put in the global offset table, so
7356 both the dynamic object and the regular object will refer to the
7357 same memory location for the variable. */
7358
7359 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
7360 to copy the initial value out of the dynamic object and into the
7361 runtime process image. We need to remember the offset into the
7362 .rela.bss section we are going to use. */
7363 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
7364 {
7365 htab->relbss->size += sizeof (Elf64_External_Rela);
7366 h->needs_copy = 1;
7367 }
7368
7369 s = htab->dynbss;
7370
7371 return _bfd_elf_adjust_dynamic_copy (info, h, s);
7372 }
7373
7374 /* If given a function descriptor symbol, hide both the function code
7375 sym and the descriptor. */
7376 static void
7377 ppc64_elf_hide_symbol (struct bfd_link_info *info,
7378 struct elf_link_hash_entry *h,
7379 bfd_boolean force_local)
7380 {
7381 struct ppc_link_hash_entry *eh;
7382 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
7383
7384 eh = (struct ppc_link_hash_entry *) h;
7385 if (eh->is_func_descriptor)
7386 {
7387 struct ppc_link_hash_entry *fh = eh->oh;
7388
7389 if (fh == NULL)
7390 {
7391 const char *p, *q;
7392 struct ppc_link_hash_table *htab;
7393 char save;
7394
7395 /* We aren't supposed to use alloca in BFD because on
7396 systems which do not have alloca the version in libiberty
7397 calls xmalloc, which might cause the program to crash
7398 when it runs out of memory. This function doesn't have a
7399 return status, so there's no way to gracefully return an
7400 error. So cheat. We know that string[-1] can be safely
7401 accessed; It's either a string in an ELF string table,
7402 or allocated in an objalloc structure. */
7403
7404 p = eh->elf.root.root.string - 1;
7405 save = *p;
7406 *(char *) p = '.';
7407 htab = ppc_hash_table (info);
7408 if (htab == NULL)
7409 return;
7410
7411 fh = (struct ppc_link_hash_entry *)
7412 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
7413 *(char *) p = save;
7414
7415 /* Unfortunately, if it so happens that the string we were
7416 looking for was allocated immediately before this string,
7417 then we overwrote the string terminator. That's the only
7418 reason the lookup should fail. */
7419 if (fh == NULL)
7420 {
7421 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
7422 while (q >= eh->elf.root.root.string && *q == *p)
7423 --q, --p;
7424 if (q < eh->elf.root.root.string && *p == '.')
7425 fh = (struct ppc_link_hash_entry *)
7426 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
7427 }
7428 if (fh != NULL)
7429 {
7430 eh->oh = fh;
7431 fh->oh = eh;
7432 }
7433 }
7434 if (fh != NULL)
7435 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
7436 }
7437 }
7438
7439 static bfd_boolean
7440 get_sym_h (struct elf_link_hash_entry **hp,
7441 Elf_Internal_Sym **symp,
7442 asection **symsecp,
7443 unsigned char **tls_maskp,
7444 Elf_Internal_Sym **locsymsp,
7445 unsigned long r_symndx,
7446 bfd *ibfd)
7447 {
7448 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
7449
7450 if (r_symndx >= symtab_hdr->sh_info)
7451 {
7452 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
7453 struct elf_link_hash_entry *h;
7454
7455 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
7456 h = elf_follow_link (h);
7457
7458 if (hp != NULL)
7459 *hp = h;
7460
7461 if (symp != NULL)
7462 *symp = NULL;
7463
7464 if (symsecp != NULL)
7465 {
7466 asection *symsec = NULL;
7467 if (h->root.type == bfd_link_hash_defined
7468 || h->root.type == bfd_link_hash_defweak)
7469 symsec = h->root.u.def.section;
7470 *symsecp = symsec;
7471 }
7472
7473 if (tls_maskp != NULL)
7474 {
7475 struct ppc_link_hash_entry *eh;
7476
7477 eh = (struct ppc_link_hash_entry *) h;
7478 *tls_maskp = &eh->tls_mask;
7479 }
7480 }
7481 else
7482 {
7483 Elf_Internal_Sym *sym;
7484 Elf_Internal_Sym *locsyms = *locsymsp;
7485
7486 if (locsyms == NULL)
7487 {
7488 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
7489 if (locsyms == NULL)
7490 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
7491 symtab_hdr->sh_info,
7492 0, NULL, NULL, NULL);
7493 if (locsyms == NULL)
7494 return FALSE;
7495 *locsymsp = locsyms;
7496 }
7497 sym = locsyms + r_symndx;
7498
7499 if (hp != NULL)
7500 *hp = NULL;
7501
7502 if (symp != NULL)
7503 *symp = sym;
7504
7505 if (symsecp != NULL)
7506 *symsecp = bfd_section_from_elf_index (ibfd, sym->st_shndx);
7507
7508 if (tls_maskp != NULL)
7509 {
7510 struct got_entry **lgot_ents;
7511 unsigned char *tls_mask;
7512
7513 tls_mask = NULL;
7514 lgot_ents = elf_local_got_ents (ibfd);
7515 if (lgot_ents != NULL)
7516 {
7517 struct plt_entry **local_plt = (struct plt_entry **)
7518 (lgot_ents + symtab_hdr->sh_info);
7519 unsigned char *lgot_masks = (unsigned char *)
7520 (local_plt + symtab_hdr->sh_info);
7521 tls_mask = &lgot_masks[r_symndx];
7522 }
7523 *tls_maskp = tls_mask;
7524 }
7525 }
7526 return TRUE;
7527 }
7528
7529 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
7530 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
7531 type suitable for optimization, and 1 otherwise. */
7532
7533 static int
7534 get_tls_mask (unsigned char **tls_maskp,
7535 unsigned long *toc_symndx,
7536 bfd_vma *toc_addend,
7537 Elf_Internal_Sym **locsymsp,
7538 const Elf_Internal_Rela *rel,
7539 bfd *ibfd)
7540 {
7541 unsigned long r_symndx;
7542 int next_r;
7543 struct elf_link_hash_entry *h;
7544 Elf_Internal_Sym *sym;
7545 asection *sec;
7546 bfd_vma off;
7547
7548 r_symndx = ELF64_R_SYM (rel->r_info);
7549 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
7550 return 0;
7551
7552 if ((*tls_maskp != NULL && **tls_maskp != 0)
7553 || sec == NULL
7554 || ppc64_elf_section_data (sec) == NULL
7555 || ppc64_elf_section_data (sec)->sec_type != sec_toc)
7556 return 1;
7557
7558 /* Look inside a TOC section too. */
7559 if (h != NULL)
7560 {
7561 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
7562 off = h->root.u.def.value;
7563 }
7564 else
7565 off = sym->st_value;
7566 off += rel->r_addend;
7567 BFD_ASSERT (off % 8 == 0);
7568 r_symndx = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8];
7569 next_r = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8 + 1];
7570 if (toc_symndx != NULL)
7571 *toc_symndx = r_symndx;
7572 if (toc_addend != NULL)
7573 *toc_addend = ppc64_elf_section_data (sec)->u.toc.add[off / 8];
7574 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
7575 return 0;
7576 if ((h == NULL || is_static_defined (h))
7577 && (next_r == -1 || next_r == -2))
7578 return 1 - next_r;
7579 return 1;
7580 }
7581
7582 /* Find (or create) an entry in the tocsave hash table. */
7583
7584 static struct tocsave_entry *
7585 tocsave_find (struct ppc_link_hash_table *htab,
7586 enum insert_option insert,
7587 Elf_Internal_Sym **local_syms,
7588 const Elf_Internal_Rela *irela,
7589 bfd *ibfd)
7590 {
7591 unsigned long r_indx;
7592 struct elf_link_hash_entry *h;
7593 Elf_Internal_Sym *sym;
7594 struct tocsave_entry ent, *p;
7595 hashval_t hash;
7596 struct tocsave_entry **slot;
7597
7598 r_indx = ELF64_R_SYM (irela->r_info);
7599 if (!get_sym_h (&h, &sym, &ent.sec, NULL, local_syms, r_indx, ibfd))
7600 return NULL;
7601 if (ent.sec == NULL || ent.sec->output_section == NULL)
7602 {
7603 _bfd_error_handler
7604 (_("%B: undefined symbol on R_PPC64_TOCSAVE relocation"));
7605 return NULL;
7606 }
7607
7608 if (h != NULL)
7609 ent.offset = h->root.u.def.value;
7610 else
7611 ent.offset = sym->st_value;
7612 ent.offset += irela->r_addend;
7613
7614 hash = tocsave_htab_hash (&ent);
7615 slot = ((struct tocsave_entry **)
7616 htab_find_slot_with_hash (htab->tocsave_htab, &ent, hash, insert));
7617 if (slot == NULL)
7618 return NULL;
7619
7620 if (*slot == NULL)
7621 {
7622 p = (struct tocsave_entry *) bfd_alloc (ibfd, sizeof (*p));
7623 if (p == NULL)
7624 return NULL;
7625 *p = ent;
7626 *slot = p;
7627 }
7628 return *slot;
7629 }
7630
7631 /* Adjust all global syms defined in opd sections. In gcc generated
7632 code for the old ABI, these will already have been done. */
7633
7634 static bfd_boolean
7635 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
7636 {
7637 struct ppc_link_hash_entry *eh;
7638 asection *sym_sec;
7639 struct _opd_sec_data *opd;
7640
7641 if (h->root.type == bfd_link_hash_indirect)
7642 return TRUE;
7643
7644 if (h->root.type != bfd_link_hash_defined
7645 && h->root.type != bfd_link_hash_defweak)
7646 return TRUE;
7647
7648 eh = (struct ppc_link_hash_entry *) h;
7649 if (eh->adjust_done)
7650 return TRUE;
7651
7652 sym_sec = eh->elf.root.u.def.section;
7653 opd = get_opd_info (sym_sec);
7654 if (opd != NULL && opd->adjust != NULL)
7655 {
7656 long adjust = opd->adjust[OPD_NDX (eh->elf.root.u.def.value)];
7657 if (adjust == -1)
7658 {
7659 /* This entry has been deleted. */
7660 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
7661 if (dsec == NULL)
7662 {
7663 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
7664 if (discarded_section (dsec))
7665 {
7666 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
7667 break;
7668 }
7669 }
7670 eh->elf.root.u.def.value = 0;
7671 eh->elf.root.u.def.section = dsec;
7672 }
7673 else
7674 eh->elf.root.u.def.value += adjust;
7675 eh->adjust_done = 1;
7676 }
7677 return TRUE;
7678 }
7679
7680 /* Handles decrementing dynamic reloc counts for the reloc specified by
7681 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM
7682 have already been determined. */
7683
7684 static bfd_boolean
7685 dec_dynrel_count (bfd_vma r_info,
7686 asection *sec,
7687 struct bfd_link_info *info,
7688 Elf_Internal_Sym **local_syms,
7689 struct elf_link_hash_entry *h,
7690 Elf_Internal_Sym *sym)
7691 {
7692 enum elf_ppc64_reloc_type r_type;
7693 asection *sym_sec = NULL;
7694
7695 /* Can this reloc be dynamic? This switch, and later tests here
7696 should be kept in sync with the code in check_relocs. */
7697 r_type = ELF64_R_TYPE (r_info);
7698 switch (r_type)
7699 {
7700 default:
7701 return TRUE;
7702
7703 case R_PPC64_TPREL16:
7704 case R_PPC64_TPREL16_LO:
7705 case R_PPC64_TPREL16_HI:
7706 case R_PPC64_TPREL16_HA:
7707 case R_PPC64_TPREL16_DS:
7708 case R_PPC64_TPREL16_LO_DS:
7709 case R_PPC64_TPREL16_HIGH:
7710 case R_PPC64_TPREL16_HIGHA:
7711 case R_PPC64_TPREL16_HIGHER:
7712 case R_PPC64_TPREL16_HIGHERA:
7713 case R_PPC64_TPREL16_HIGHEST:
7714 case R_PPC64_TPREL16_HIGHESTA:
7715 if (!bfd_link_pic (info))
7716 return TRUE;
7717
7718 case R_PPC64_TPREL64:
7719 case R_PPC64_DTPMOD64:
7720 case R_PPC64_DTPREL64:
7721 case R_PPC64_ADDR64:
7722 case R_PPC64_REL30:
7723 case R_PPC64_REL32:
7724 case R_PPC64_REL64:
7725 case R_PPC64_ADDR14:
7726 case R_PPC64_ADDR14_BRNTAKEN:
7727 case R_PPC64_ADDR14_BRTAKEN:
7728 case R_PPC64_ADDR16:
7729 case R_PPC64_ADDR16_DS:
7730 case R_PPC64_ADDR16_HA:
7731 case R_PPC64_ADDR16_HI:
7732 case R_PPC64_ADDR16_HIGH:
7733 case R_PPC64_ADDR16_HIGHA:
7734 case R_PPC64_ADDR16_HIGHER:
7735 case R_PPC64_ADDR16_HIGHERA:
7736 case R_PPC64_ADDR16_HIGHEST:
7737 case R_PPC64_ADDR16_HIGHESTA:
7738 case R_PPC64_ADDR16_LO:
7739 case R_PPC64_ADDR16_LO_DS:
7740 case R_PPC64_ADDR24:
7741 case R_PPC64_ADDR32:
7742 case R_PPC64_UADDR16:
7743 case R_PPC64_UADDR32:
7744 case R_PPC64_UADDR64:
7745 case R_PPC64_TOC:
7746 break;
7747 }
7748
7749 if (local_syms != NULL)
7750 {
7751 unsigned long r_symndx;
7752 bfd *ibfd = sec->owner;
7753
7754 r_symndx = ELF64_R_SYM (r_info);
7755 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
7756 return FALSE;
7757 }
7758
7759 if ((bfd_link_pic (info)
7760 && (must_be_dyn_reloc (info, r_type)
7761 || (h != NULL
7762 && (!SYMBOLIC_BIND (info, h)
7763 || h->root.type == bfd_link_hash_defweak
7764 || !h->def_regular))))
7765 || (ELIMINATE_COPY_RELOCS
7766 && !bfd_link_pic (info)
7767 && h != NULL
7768 && (h->root.type == bfd_link_hash_defweak
7769 || !h->def_regular)))
7770 ;
7771 else
7772 return TRUE;
7773
7774 if (h != NULL)
7775 {
7776 struct elf_dyn_relocs *p;
7777 struct elf_dyn_relocs **pp;
7778 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
7779
7780 /* elf_gc_sweep may have already removed all dyn relocs associated
7781 with local syms for a given section. Also, symbol flags are
7782 changed by elf_gc_sweep_symbol, confusing the test above. Don't
7783 report a dynreloc miscount. */
7784 if (*pp == NULL && info->gc_sections)
7785 return TRUE;
7786
7787 while ((p = *pp) != NULL)
7788 {
7789 if (p->sec == sec)
7790 {
7791 if (!must_be_dyn_reloc (info, r_type))
7792 p->pc_count -= 1;
7793 p->count -= 1;
7794 if (p->count == 0)
7795 *pp = p->next;
7796 return TRUE;
7797 }
7798 pp = &p->next;
7799 }
7800 }
7801 else
7802 {
7803 struct ppc_dyn_relocs *p;
7804 struct ppc_dyn_relocs **pp;
7805 void *vpp;
7806 bfd_boolean is_ifunc;
7807
7808 if (local_syms == NULL)
7809 sym_sec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
7810 if (sym_sec == NULL)
7811 sym_sec = sec;
7812
7813 vpp = &elf_section_data (sym_sec)->local_dynrel;
7814 pp = (struct ppc_dyn_relocs **) vpp;
7815
7816 if (*pp == NULL && info->gc_sections)
7817 return TRUE;
7818
7819 is_ifunc = ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC;
7820 while ((p = *pp) != NULL)
7821 {
7822 if (p->sec == sec && p->ifunc == is_ifunc)
7823 {
7824 p->count -= 1;
7825 if (p->count == 0)
7826 *pp = p->next;
7827 return TRUE;
7828 }
7829 pp = &p->next;
7830 }
7831 }
7832
7833 info->callbacks->einfo (_("%P: dynreloc miscount for %B, section %A\n"),
7834 sec->owner, sec);
7835 bfd_set_error (bfd_error_bad_value);
7836 return FALSE;
7837 }
7838
7839 /* Remove unused Official Procedure Descriptor entries. Currently we
7840 only remove those associated with functions in discarded link-once
7841 sections, or weakly defined functions that have been overridden. It
7842 would be possible to remove many more entries for statically linked
7843 applications. */
7844
7845 bfd_boolean
7846 ppc64_elf_edit_opd (struct bfd_link_info *info)
7847 {
7848 bfd *ibfd;
7849 bfd_boolean some_edited = FALSE;
7850 asection *need_pad = NULL;
7851 struct ppc_link_hash_table *htab;
7852
7853 htab = ppc_hash_table (info);
7854 if (htab == NULL)
7855 return FALSE;
7856
7857 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
7858 {
7859 asection *sec;
7860 Elf_Internal_Rela *relstart, *rel, *relend;
7861 Elf_Internal_Shdr *symtab_hdr;
7862 Elf_Internal_Sym *local_syms;
7863 struct _opd_sec_data *opd;
7864 bfd_boolean need_edit, add_aux_fields, broken;
7865 bfd_size_type cnt_16b = 0;
7866
7867 if (!is_ppc64_elf (ibfd))
7868 continue;
7869
7870 sec = bfd_get_section_by_name (ibfd, ".opd");
7871 if (sec == NULL || sec->size == 0)
7872 continue;
7873
7874 if (sec->sec_info_type == SEC_INFO_TYPE_JUST_SYMS)
7875 continue;
7876
7877 if (sec->output_section == bfd_abs_section_ptr)
7878 continue;
7879
7880 /* Look through the section relocs. */
7881 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
7882 continue;
7883
7884 local_syms = NULL;
7885 symtab_hdr = &elf_symtab_hdr (ibfd);
7886
7887 /* Read the relocations. */
7888 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7889 info->keep_memory);
7890 if (relstart == NULL)
7891 return FALSE;
7892
7893 /* First run through the relocs to check they are sane, and to
7894 determine whether we need to edit this opd section. */
7895 need_edit = FALSE;
7896 broken = FALSE;
7897 need_pad = sec;
7898 relend = relstart + sec->reloc_count;
7899 for (rel = relstart; rel < relend; )
7900 {
7901 enum elf_ppc64_reloc_type r_type;
7902 unsigned long r_symndx;
7903 asection *sym_sec;
7904 struct elf_link_hash_entry *h;
7905 Elf_Internal_Sym *sym;
7906 bfd_vma offset;
7907
7908 /* .opd contains an array of 16 or 24 byte entries. We're
7909 only interested in the reloc pointing to a function entry
7910 point. */
7911 offset = rel->r_offset;
7912 if (rel + 1 == relend
7913 || rel[1].r_offset != offset + 8)
7914 {
7915 /* If someone messes with .opd alignment then after a
7916 "ld -r" we might have padding in the middle of .opd.
7917 Also, there's nothing to prevent someone putting
7918 something silly in .opd with the assembler. No .opd
7919 optimization for them! */
7920 broken_opd:
7921 _bfd_error_handler
7922 (_("%B: .opd is not a regular array of opd entries"), ibfd);
7923 broken = TRUE;
7924 break;
7925 }
7926
7927 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
7928 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
7929 {
7930 _bfd_error_handler
7931 (_("%B: unexpected reloc type %u in .opd section"),
7932 ibfd, r_type);
7933 broken = TRUE;
7934 break;
7935 }
7936
7937 r_symndx = ELF64_R_SYM (rel->r_info);
7938 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7939 r_symndx, ibfd))
7940 goto error_ret;
7941
7942 if (sym_sec == NULL || sym_sec->owner == NULL)
7943 {
7944 const char *sym_name;
7945 if (h != NULL)
7946 sym_name = h->root.root.string;
7947 else
7948 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
7949 sym_sec);
7950
7951 _bfd_error_handler
7952 (_("%B: undefined sym `%s' in .opd section"),
7953 ibfd, sym_name);
7954 broken = TRUE;
7955 break;
7956 }
7957
7958 /* opd entries are always for functions defined in the
7959 current input bfd. If the symbol isn't defined in the
7960 input bfd, then we won't be using the function in this
7961 bfd; It must be defined in a linkonce section in another
7962 bfd, or is weak. It's also possible that we are
7963 discarding the function due to a linker script /DISCARD/,
7964 which we test for via the output_section. */
7965 if (sym_sec->owner != ibfd
7966 || sym_sec->output_section == bfd_abs_section_ptr)
7967 need_edit = TRUE;
7968
7969 rel += 2;
7970 if (rel + 1 == relend
7971 || (rel + 2 < relend
7972 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC))
7973 ++rel;
7974
7975 if (rel == relend)
7976 {
7977 if (sec->size == offset + 24)
7978 {
7979 need_pad = NULL;
7980 break;
7981 }
7982 if (sec->size == offset + 16)
7983 {
7984 cnt_16b++;
7985 break;
7986 }
7987 goto broken_opd;
7988 }
7989 else if (rel + 1 < relend
7990 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
7991 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
7992 {
7993 if (rel[0].r_offset == offset + 16)
7994 cnt_16b++;
7995 else if (rel[0].r_offset != offset + 24)
7996 goto broken_opd;
7997 }
7998 else
7999 goto broken_opd;
8000 }
8001
8002 add_aux_fields = htab->params->non_overlapping_opd && cnt_16b > 0;
8003
8004 if (!broken && (need_edit || add_aux_fields))
8005 {
8006 Elf_Internal_Rela *write_rel;
8007 Elf_Internal_Shdr *rel_hdr;
8008 bfd_byte *rptr, *wptr;
8009 bfd_byte *new_contents;
8010 bfd_size_type amt;
8011
8012 new_contents = NULL;
8013 amt = OPD_NDX (sec->size) * sizeof (long);
8014 opd = &ppc64_elf_section_data (sec)->u.opd;
8015 opd->adjust = bfd_zalloc (sec->owner, amt);
8016 if (opd->adjust == NULL)
8017 return FALSE;
8018 ppc64_elf_section_data (sec)->sec_type = sec_opd;
8019
8020 /* This seems a waste of time as input .opd sections are all
8021 zeros as generated by gcc, but I suppose there's no reason
8022 this will always be so. We might start putting something in
8023 the third word of .opd entries. */
8024 if ((sec->flags & SEC_IN_MEMORY) == 0)
8025 {
8026 bfd_byte *loc;
8027 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
8028 {
8029 if (loc != NULL)
8030 free (loc);
8031 error_ret:
8032 if (local_syms != NULL
8033 && symtab_hdr->contents != (unsigned char *) local_syms)
8034 free (local_syms);
8035 if (elf_section_data (sec)->relocs != relstart)
8036 free (relstart);
8037 return FALSE;
8038 }
8039 sec->contents = loc;
8040 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
8041 }
8042
8043 elf_section_data (sec)->relocs = relstart;
8044
8045 new_contents = sec->contents;
8046 if (add_aux_fields)
8047 {
8048 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
8049 if (new_contents == NULL)
8050 return FALSE;
8051 need_pad = NULL;
8052 }
8053 wptr = new_contents;
8054 rptr = sec->contents;
8055 write_rel = relstart;
8056 for (rel = relstart; rel < relend; )
8057 {
8058 unsigned long r_symndx;
8059 asection *sym_sec;
8060 struct elf_link_hash_entry *h;
8061 struct ppc_link_hash_entry *fdh = NULL;
8062 Elf_Internal_Sym *sym;
8063 long opd_ent_size;
8064 Elf_Internal_Rela *next_rel;
8065 bfd_boolean skip;
8066
8067 r_symndx = ELF64_R_SYM (rel->r_info);
8068 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8069 r_symndx, ibfd))
8070 goto error_ret;
8071
8072 next_rel = rel + 2;
8073 if (next_rel + 1 == relend
8074 || (next_rel + 2 < relend
8075 && ELF64_R_TYPE (next_rel[2].r_info) == R_PPC64_TOC))
8076 ++next_rel;
8077
8078 /* See if the .opd entry is full 24 byte or
8079 16 byte (with fd_aux entry overlapped with next
8080 fd_func). */
8081 opd_ent_size = 24;
8082 if (next_rel == relend)
8083 {
8084 if (sec->size == rel->r_offset + 16)
8085 opd_ent_size = 16;
8086 }
8087 else if (next_rel->r_offset == rel->r_offset + 16)
8088 opd_ent_size = 16;
8089
8090 if (h != NULL
8091 && h->root.root.string[0] == '.')
8092 {
8093 fdh = lookup_fdh ((struct ppc_link_hash_entry *) h, htab);
8094 if (fdh != NULL
8095 && fdh->elf.root.type != bfd_link_hash_defined
8096 && fdh->elf.root.type != bfd_link_hash_defweak)
8097 fdh = NULL;
8098 }
8099
8100 skip = (sym_sec->owner != ibfd
8101 || sym_sec->output_section == bfd_abs_section_ptr);
8102 if (skip)
8103 {
8104 if (fdh != NULL && sym_sec->owner == ibfd)
8105 {
8106 /* Arrange for the function descriptor sym
8107 to be dropped. */
8108 fdh->elf.root.u.def.value = 0;
8109 fdh->elf.root.u.def.section = sym_sec;
8110 }
8111 opd->adjust[OPD_NDX (rel->r_offset)] = -1;
8112
8113 if (NO_OPD_RELOCS || bfd_link_relocatable (info))
8114 rel = next_rel;
8115 else
8116 while (1)
8117 {
8118 if (!dec_dynrel_count (rel->r_info, sec, info,
8119 NULL, h, sym))
8120 goto error_ret;
8121
8122 if (++rel == next_rel)
8123 break;
8124
8125 r_symndx = ELF64_R_SYM (rel->r_info);
8126 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8127 r_symndx, ibfd))
8128 goto error_ret;
8129 }
8130 }
8131 else
8132 {
8133 /* We'll be keeping this opd entry. */
8134 long adjust;
8135
8136 if (fdh != NULL)
8137 {
8138 /* Redefine the function descriptor symbol to
8139 this location in the opd section. It is
8140 necessary to update the value here rather
8141 than using an array of adjustments as we do
8142 for local symbols, because various places
8143 in the generic ELF code use the value
8144 stored in u.def.value. */
8145 fdh->elf.root.u.def.value = wptr - new_contents;
8146 fdh->adjust_done = 1;
8147 }
8148
8149 /* Local syms are a bit tricky. We could
8150 tweak them as they can be cached, but
8151 we'd need to look through the local syms
8152 for the function descriptor sym which we
8153 don't have at the moment. So keep an
8154 array of adjustments. */
8155 adjust = (wptr - new_contents) - (rptr - sec->contents);
8156 opd->adjust[OPD_NDX (rel->r_offset)] = adjust;
8157
8158 if (wptr != rptr)
8159 memcpy (wptr, rptr, opd_ent_size);
8160 wptr += opd_ent_size;
8161 if (add_aux_fields && opd_ent_size == 16)
8162 {
8163 memset (wptr, '\0', 8);
8164 wptr += 8;
8165 }
8166
8167 /* We need to adjust any reloc offsets to point to the
8168 new opd entries. */
8169 for ( ; rel != next_rel; ++rel)
8170 {
8171 rel->r_offset += adjust;
8172 if (write_rel != rel)
8173 memcpy (write_rel, rel, sizeof (*rel));
8174 ++write_rel;
8175 }
8176 }
8177
8178 rptr += opd_ent_size;
8179 }
8180
8181 sec->size = wptr - new_contents;
8182 sec->reloc_count = write_rel - relstart;
8183 if (add_aux_fields)
8184 {
8185 free (sec->contents);
8186 sec->contents = new_contents;
8187 }
8188
8189 /* Fudge the header size too, as this is used later in
8190 elf_bfd_final_link if we are emitting relocs. */
8191 rel_hdr = _bfd_elf_single_rel_hdr (sec);
8192 rel_hdr->sh_size = sec->reloc_count * rel_hdr->sh_entsize;
8193 some_edited = TRUE;
8194 }
8195 else if (elf_section_data (sec)->relocs != relstart)
8196 free (relstart);
8197
8198 if (local_syms != NULL
8199 && symtab_hdr->contents != (unsigned char *) local_syms)
8200 {
8201 if (!info->keep_memory)
8202 free (local_syms);
8203 else
8204 symtab_hdr->contents = (unsigned char *) local_syms;
8205 }
8206 }
8207
8208 if (some_edited)
8209 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
8210
8211 /* If we are doing a final link and the last .opd entry is just 16 byte
8212 long, add a 8 byte padding after it. */
8213 if (need_pad != NULL && !bfd_link_relocatable (info))
8214 {
8215 bfd_byte *p;
8216
8217 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
8218 {
8219 BFD_ASSERT (need_pad->size > 0);
8220
8221 p = bfd_malloc (need_pad->size + 8);
8222 if (p == NULL)
8223 return FALSE;
8224
8225 if (! bfd_get_section_contents (need_pad->owner, need_pad,
8226 p, 0, need_pad->size))
8227 return FALSE;
8228
8229 need_pad->contents = p;
8230 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
8231 }
8232 else
8233 {
8234 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
8235 if (p == NULL)
8236 return FALSE;
8237
8238 need_pad->contents = p;
8239 }
8240
8241 memset (need_pad->contents + need_pad->size, 0, 8);
8242 need_pad->size += 8;
8243 }
8244
8245 return TRUE;
8246 }
8247
8248 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
8249
8250 asection *
8251 ppc64_elf_tls_setup (struct bfd_link_info *info)
8252 {
8253 struct ppc_link_hash_table *htab;
8254
8255 htab = ppc_hash_table (info);
8256 if (htab == NULL)
8257 return NULL;
8258
8259 if (abiversion (info->output_bfd) == 1)
8260 htab->opd_abi = 1;
8261
8262 if (htab->params->no_multi_toc)
8263 htab->do_multi_toc = 0;
8264 else if (!htab->do_multi_toc)
8265 htab->params->no_multi_toc = 1;
8266
8267 htab->tls_get_addr = ((struct ppc_link_hash_entry *)
8268 elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
8269 FALSE, FALSE, TRUE));
8270 /* Move dynamic linking info to the function descriptor sym. */
8271 if (htab->tls_get_addr != NULL)
8272 func_desc_adjust (&htab->tls_get_addr->elf, info);
8273 htab->tls_get_addr_fd = ((struct ppc_link_hash_entry *)
8274 elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
8275 FALSE, FALSE, TRUE));
8276 if (htab->params->tls_get_addr_opt)
8277 {
8278 struct elf_link_hash_entry *opt, *opt_fd, *tga, *tga_fd;
8279
8280 opt = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr_opt",
8281 FALSE, FALSE, TRUE);
8282 if (opt != NULL)
8283 func_desc_adjust (opt, info);
8284 opt_fd = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
8285 FALSE, FALSE, TRUE);
8286 if (opt_fd != NULL
8287 && (opt_fd->root.type == bfd_link_hash_defined
8288 || opt_fd->root.type == bfd_link_hash_defweak))
8289 {
8290 /* If glibc supports an optimized __tls_get_addr call stub,
8291 signalled by the presence of __tls_get_addr_opt, and we'll
8292 be calling __tls_get_addr via a plt call stub, then
8293 make __tls_get_addr point to __tls_get_addr_opt. */
8294 tga_fd = &htab->tls_get_addr_fd->elf;
8295 if (htab->elf.dynamic_sections_created
8296 && tga_fd != NULL
8297 && (tga_fd->type == STT_FUNC
8298 || tga_fd->needs_plt)
8299 && !(SYMBOL_CALLS_LOCAL (info, tga_fd)
8300 || (ELF_ST_VISIBILITY (tga_fd->other) != STV_DEFAULT
8301 && tga_fd->root.type == bfd_link_hash_undefweak)))
8302 {
8303 struct plt_entry *ent;
8304
8305 for (ent = tga_fd->plt.plist; ent != NULL; ent = ent->next)
8306 if (ent->plt.refcount > 0)
8307 break;
8308 if (ent != NULL)
8309 {
8310 tga_fd->root.type = bfd_link_hash_indirect;
8311 tga_fd->root.u.i.link = &opt_fd->root;
8312 ppc64_elf_copy_indirect_symbol (info, opt_fd, tga_fd);
8313 opt_fd->forced_local = 0;
8314 if (opt_fd->dynindx != -1)
8315 {
8316 /* Use __tls_get_addr_opt in dynamic relocations. */
8317 opt_fd->dynindx = -1;
8318 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
8319 opt_fd->dynstr_index);
8320 if (!bfd_elf_link_record_dynamic_symbol (info, opt_fd))
8321 return NULL;
8322 }
8323 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) opt_fd;
8324 tga = &htab->tls_get_addr->elf;
8325 if (opt != NULL && tga != NULL)
8326 {
8327 tga->root.type = bfd_link_hash_indirect;
8328 tga->root.u.i.link = &opt->root;
8329 ppc64_elf_copy_indirect_symbol (info, opt, tga);
8330 opt->forced_local = 0;
8331 _bfd_elf_link_hash_hide_symbol (info, opt,
8332 tga->forced_local);
8333 htab->tls_get_addr = (struct ppc_link_hash_entry *) opt;
8334 }
8335 htab->tls_get_addr_fd->oh = htab->tls_get_addr;
8336 htab->tls_get_addr_fd->is_func_descriptor = 1;
8337 if (htab->tls_get_addr != NULL)
8338 {
8339 htab->tls_get_addr->oh = htab->tls_get_addr_fd;
8340 htab->tls_get_addr->is_func = 1;
8341 }
8342 }
8343 }
8344 }
8345 else if (htab->params->tls_get_addr_opt < 0)
8346 htab->params->tls_get_addr_opt = 0;
8347 }
8348 return _bfd_elf_tls_setup (info->output_bfd, info);
8349 }
8350
8351 /* Return TRUE iff REL is a branch reloc with a global symbol matching
8352 HASH1 or HASH2. */
8353
8354 static bfd_boolean
8355 branch_reloc_hash_match (const bfd *ibfd,
8356 const Elf_Internal_Rela *rel,
8357 const struct ppc_link_hash_entry *hash1,
8358 const struct ppc_link_hash_entry *hash2)
8359 {
8360 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
8361 enum elf_ppc64_reloc_type r_type = ELF64_R_TYPE (rel->r_info);
8362 unsigned int r_symndx = ELF64_R_SYM (rel->r_info);
8363
8364 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
8365 {
8366 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
8367 struct elf_link_hash_entry *h;
8368
8369 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
8370 h = elf_follow_link (h);
8371 if (h == &hash1->elf || h == &hash2->elf)
8372 return TRUE;
8373 }
8374 return FALSE;
8375 }
8376
8377 /* Run through all the TLS relocs looking for optimization
8378 opportunities. The linker has been hacked (see ppc64elf.em) to do
8379 a preliminary section layout so that we know the TLS segment
8380 offsets. We can't optimize earlier because some optimizations need
8381 to know the tp offset, and we need to optimize before allocating
8382 dynamic relocations. */
8383
8384 bfd_boolean
8385 ppc64_elf_tls_optimize (struct bfd_link_info *info)
8386 {
8387 bfd *ibfd;
8388 asection *sec;
8389 struct ppc_link_hash_table *htab;
8390 unsigned char *toc_ref;
8391 int pass;
8392
8393 if (!bfd_link_executable (info))
8394 return TRUE;
8395
8396 htab = ppc_hash_table (info);
8397 if (htab == NULL)
8398 return FALSE;
8399
8400 /* Make two passes over the relocs. On the first pass, mark toc
8401 entries involved with tls relocs, and check that tls relocs
8402 involved in setting up a tls_get_addr call are indeed followed by
8403 such a call. If they are not, we can't do any tls optimization.
8404 On the second pass twiddle tls_mask flags to notify
8405 relocate_section that optimization can be done, and adjust got
8406 and plt refcounts. */
8407 toc_ref = NULL;
8408 for (pass = 0; pass < 2; ++pass)
8409 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
8410 {
8411 Elf_Internal_Sym *locsyms = NULL;
8412 asection *toc = bfd_get_section_by_name (ibfd, ".toc");
8413
8414 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8415 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
8416 {
8417 Elf_Internal_Rela *relstart, *rel, *relend;
8418 bfd_boolean found_tls_get_addr_arg = 0;
8419
8420 /* Read the relocations. */
8421 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8422 info->keep_memory);
8423 if (relstart == NULL)
8424 {
8425 free (toc_ref);
8426 return FALSE;
8427 }
8428
8429 relend = relstart + sec->reloc_count;
8430 for (rel = relstart; rel < relend; rel++)
8431 {
8432 enum elf_ppc64_reloc_type r_type;
8433 unsigned long r_symndx;
8434 struct elf_link_hash_entry *h;
8435 Elf_Internal_Sym *sym;
8436 asection *sym_sec;
8437 unsigned char *tls_mask;
8438 unsigned char tls_set, tls_clear, tls_type = 0;
8439 bfd_vma value;
8440 bfd_boolean ok_tprel, is_local;
8441 long toc_ref_index = 0;
8442 int expecting_tls_get_addr = 0;
8443 bfd_boolean ret = FALSE;
8444
8445 r_symndx = ELF64_R_SYM (rel->r_info);
8446 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
8447 r_symndx, ibfd))
8448 {
8449 err_free_rel:
8450 if (elf_section_data (sec)->relocs != relstart)
8451 free (relstart);
8452 if (toc_ref != NULL)
8453 free (toc_ref);
8454 if (locsyms != NULL
8455 && (elf_symtab_hdr (ibfd).contents
8456 != (unsigned char *) locsyms))
8457 free (locsyms);
8458 return ret;
8459 }
8460
8461 if (h != NULL)
8462 {
8463 if (h->root.type == bfd_link_hash_defined
8464 || h->root.type == bfd_link_hash_defweak)
8465 value = h->root.u.def.value;
8466 else if (h->root.type == bfd_link_hash_undefweak)
8467 value = 0;
8468 else
8469 {
8470 found_tls_get_addr_arg = 0;
8471 continue;
8472 }
8473 }
8474 else
8475 /* Symbols referenced by TLS relocs must be of type
8476 STT_TLS. So no need for .opd local sym adjust. */
8477 value = sym->st_value;
8478
8479 ok_tprel = FALSE;
8480 is_local = FALSE;
8481 if (h == NULL
8482 || !h->def_dynamic)
8483 {
8484 is_local = TRUE;
8485 if (h != NULL
8486 && h->root.type == bfd_link_hash_undefweak)
8487 ok_tprel = TRUE;
8488 else if (sym_sec != NULL
8489 && sym_sec->output_section != NULL)
8490 {
8491 value += sym_sec->output_offset;
8492 value += sym_sec->output_section->vma;
8493 value -= htab->elf.tls_sec->vma;
8494 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
8495 < (bfd_vma) 1 << 32);
8496 }
8497 }
8498
8499 r_type = ELF64_R_TYPE (rel->r_info);
8500 /* If this section has old-style __tls_get_addr calls
8501 without marker relocs, then check that each
8502 __tls_get_addr call reloc is preceded by a reloc
8503 that conceivably belongs to the __tls_get_addr arg
8504 setup insn. If we don't find matching arg setup
8505 relocs, don't do any tls optimization. */
8506 if (pass == 0
8507 && sec->has_tls_get_addr_call
8508 && h != NULL
8509 && (h == &htab->tls_get_addr->elf
8510 || h == &htab->tls_get_addr_fd->elf)
8511 && !found_tls_get_addr_arg
8512 && is_branch_reloc (r_type))
8513 {
8514 info->callbacks->minfo (_("%H __tls_get_addr lost arg, "
8515 "TLS optimization disabled\n"),
8516 ibfd, sec, rel->r_offset);
8517 ret = TRUE;
8518 goto err_free_rel;
8519 }
8520
8521 found_tls_get_addr_arg = 0;
8522 switch (r_type)
8523 {
8524 case R_PPC64_GOT_TLSLD16:
8525 case R_PPC64_GOT_TLSLD16_LO:
8526 expecting_tls_get_addr = 1;
8527 found_tls_get_addr_arg = 1;
8528 /* Fall through. */
8529
8530 case R_PPC64_GOT_TLSLD16_HI:
8531 case R_PPC64_GOT_TLSLD16_HA:
8532 /* These relocs should never be against a symbol
8533 defined in a shared lib. Leave them alone if
8534 that turns out to be the case. */
8535 if (!is_local)
8536 continue;
8537
8538 /* LD -> LE */
8539 tls_set = 0;
8540 tls_clear = TLS_LD;
8541 tls_type = TLS_TLS | TLS_LD;
8542 break;
8543
8544 case R_PPC64_GOT_TLSGD16:
8545 case R_PPC64_GOT_TLSGD16_LO:
8546 expecting_tls_get_addr = 1;
8547 found_tls_get_addr_arg = 1;
8548 /* Fall through. */
8549
8550 case R_PPC64_GOT_TLSGD16_HI:
8551 case R_PPC64_GOT_TLSGD16_HA:
8552 if (ok_tprel)
8553 /* GD -> LE */
8554 tls_set = 0;
8555 else
8556 /* GD -> IE */
8557 tls_set = TLS_TLS | TLS_TPRELGD;
8558 tls_clear = TLS_GD;
8559 tls_type = TLS_TLS | TLS_GD;
8560 break;
8561
8562 case R_PPC64_GOT_TPREL16_DS:
8563 case R_PPC64_GOT_TPREL16_LO_DS:
8564 case R_PPC64_GOT_TPREL16_HI:
8565 case R_PPC64_GOT_TPREL16_HA:
8566 if (ok_tprel)
8567 {
8568 /* IE -> LE */
8569 tls_set = 0;
8570 tls_clear = TLS_TPREL;
8571 tls_type = TLS_TLS | TLS_TPREL;
8572 break;
8573 }
8574 continue;
8575
8576 case R_PPC64_TLSGD:
8577 case R_PPC64_TLSLD:
8578 found_tls_get_addr_arg = 1;
8579 /* Fall through. */
8580
8581 case R_PPC64_TLS:
8582 case R_PPC64_TOC16:
8583 case R_PPC64_TOC16_LO:
8584 if (sym_sec == NULL || sym_sec != toc)
8585 continue;
8586
8587 /* Mark this toc entry as referenced by a TLS
8588 code sequence. We can do that now in the
8589 case of R_PPC64_TLS, and after checking for
8590 tls_get_addr for the TOC16 relocs. */
8591 if (toc_ref == NULL)
8592 toc_ref = bfd_zmalloc (toc->output_section->rawsize / 8);
8593 if (toc_ref == NULL)
8594 goto err_free_rel;
8595
8596 if (h != NULL)
8597 value = h->root.u.def.value;
8598 else
8599 value = sym->st_value;
8600 value += rel->r_addend;
8601 if (value % 8 != 0)
8602 continue;
8603 BFD_ASSERT (value < toc->size
8604 && toc->output_offset % 8 == 0);
8605 toc_ref_index = (value + toc->output_offset) / 8;
8606 if (r_type == R_PPC64_TLS
8607 || r_type == R_PPC64_TLSGD
8608 || r_type == R_PPC64_TLSLD)
8609 {
8610 toc_ref[toc_ref_index] = 1;
8611 continue;
8612 }
8613
8614 if (pass != 0 && toc_ref[toc_ref_index] == 0)
8615 continue;
8616
8617 tls_set = 0;
8618 tls_clear = 0;
8619 expecting_tls_get_addr = 2;
8620 break;
8621
8622 case R_PPC64_TPREL64:
8623 if (pass == 0
8624 || sec != toc
8625 || toc_ref == NULL
8626 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
8627 continue;
8628 if (ok_tprel)
8629 {
8630 /* IE -> LE */
8631 tls_set = TLS_EXPLICIT;
8632 tls_clear = TLS_TPREL;
8633 break;
8634 }
8635 continue;
8636
8637 case R_PPC64_DTPMOD64:
8638 if (pass == 0
8639 || sec != toc
8640 || toc_ref == NULL
8641 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
8642 continue;
8643 if (rel + 1 < relend
8644 && (rel[1].r_info
8645 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
8646 && rel[1].r_offset == rel->r_offset + 8)
8647 {
8648 if (ok_tprel)
8649 /* GD -> LE */
8650 tls_set = TLS_EXPLICIT | TLS_GD;
8651 else
8652 /* GD -> IE */
8653 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
8654 tls_clear = TLS_GD;
8655 }
8656 else
8657 {
8658 if (!is_local)
8659 continue;
8660
8661 /* LD -> LE */
8662 tls_set = TLS_EXPLICIT;
8663 tls_clear = TLS_LD;
8664 }
8665 break;
8666
8667 default:
8668 continue;
8669 }
8670
8671 if (pass == 0)
8672 {
8673 if (!expecting_tls_get_addr
8674 || !sec->has_tls_get_addr_call)
8675 continue;
8676
8677 if (rel + 1 < relend
8678 && branch_reloc_hash_match (ibfd, rel + 1,
8679 htab->tls_get_addr,
8680 htab->tls_get_addr_fd))
8681 {
8682 if (expecting_tls_get_addr == 2)
8683 {
8684 /* Check for toc tls entries. */
8685 unsigned char *toc_tls;
8686 int retval;
8687
8688 retval = get_tls_mask (&toc_tls, NULL, NULL,
8689 &locsyms,
8690 rel, ibfd);
8691 if (retval == 0)
8692 goto err_free_rel;
8693 if (toc_tls != NULL)
8694 {
8695 if ((*toc_tls & (TLS_GD | TLS_LD)) != 0)
8696 found_tls_get_addr_arg = 1;
8697 if (retval > 1)
8698 toc_ref[toc_ref_index] = 1;
8699 }
8700 }
8701 continue;
8702 }
8703
8704 if (expecting_tls_get_addr != 1)
8705 continue;
8706
8707 /* Uh oh, we didn't find the expected call. We
8708 could just mark this symbol to exclude it
8709 from tls optimization but it's safer to skip
8710 the entire optimization. */
8711 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
8712 "TLS optimization disabled\n"),
8713 ibfd, sec, rel->r_offset);
8714 ret = TRUE;
8715 goto err_free_rel;
8716 }
8717
8718 if (expecting_tls_get_addr && htab->tls_get_addr != NULL)
8719 {
8720 struct plt_entry *ent;
8721 for (ent = htab->tls_get_addr->elf.plt.plist;
8722 ent != NULL;
8723 ent = ent->next)
8724 if (ent->addend == 0)
8725 {
8726 if (ent->plt.refcount > 0)
8727 {
8728 ent->plt.refcount -= 1;
8729 expecting_tls_get_addr = 0;
8730 }
8731 break;
8732 }
8733 }
8734
8735 if (expecting_tls_get_addr && htab->tls_get_addr_fd != NULL)
8736 {
8737 struct plt_entry *ent;
8738 for (ent = htab->tls_get_addr_fd->elf.plt.plist;
8739 ent != NULL;
8740 ent = ent->next)
8741 if (ent->addend == 0)
8742 {
8743 if (ent->plt.refcount > 0)
8744 ent->plt.refcount -= 1;
8745 break;
8746 }
8747 }
8748
8749 if (tls_clear == 0)
8750 continue;
8751
8752 if ((tls_set & TLS_EXPLICIT) == 0)
8753 {
8754 struct got_entry *ent;
8755
8756 /* Adjust got entry for this reloc. */
8757 if (h != NULL)
8758 ent = h->got.glist;
8759 else
8760 ent = elf_local_got_ents (ibfd)[r_symndx];
8761
8762 for (; ent != NULL; ent = ent->next)
8763 if (ent->addend == rel->r_addend
8764 && ent->owner == ibfd
8765 && ent->tls_type == tls_type)
8766 break;
8767 if (ent == NULL)
8768 abort ();
8769
8770 if (tls_set == 0)
8771 {
8772 /* We managed to get rid of a got entry. */
8773 if (ent->got.refcount > 0)
8774 ent->got.refcount -= 1;
8775 }
8776 }
8777 else
8778 {
8779 /* If we got rid of a DTPMOD/DTPREL reloc pair then
8780 we'll lose one or two dyn relocs. */
8781 if (!dec_dynrel_count (rel->r_info, sec, info,
8782 NULL, h, sym))
8783 return FALSE;
8784
8785 if (tls_set == (TLS_EXPLICIT | TLS_GD))
8786 {
8787 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
8788 NULL, h, sym))
8789 return FALSE;
8790 }
8791 }
8792
8793 *tls_mask |= tls_set;
8794 *tls_mask &= ~tls_clear;
8795 }
8796
8797 if (elf_section_data (sec)->relocs != relstart)
8798 free (relstart);
8799 }
8800
8801 if (locsyms != NULL
8802 && (elf_symtab_hdr (ibfd).contents != (unsigned char *) locsyms))
8803 {
8804 if (!info->keep_memory)
8805 free (locsyms);
8806 else
8807 elf_symtab_hdr (ibfd).contents = (unsigned char *) locsyms;
8808 }
8809 }
8810
8811 if (toc_ref != NULL)
8812 free (toc_ref);
8813 return TRUE;
8814 }
8815
8816 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
8817 the values of any global symbols in a toc section that has been
8818 edited. Globals in toc sections should be a rarity, so this function
8819 sets a flag if any are found in toc sections other than the one just
8820 edited, so that futher hash table traversals can be avoided. */
8821
8822 struct adjust_toc_info
8823 {
8824 asection *toc;
8825 unsigned long *skip;
8826 bfd_boolean global_toc_syms;
8827 };
8828
8829 enum toc_skip_enum { ref_from_discarded = 1, can_optimize = 2 };
8830
8831 static bfd_boolean
8832 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
8833 {
8834 struct ppc_link_hash_entry *eh;
8835 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
8836 unsigned long i;
8837
8838 if (h->root.type != bfd_link_hash_defined
8839 && h->root.type != bfd_link_hash_defweak)
8840 return TRUE;
8841
8842 eh = (struct ppc_link_hash_entry *) h;
8843 if (eh->adjust_done)
8844 return TRUE;
8845
8846 if (eh->elf.root.u.def.section == toc_inf->toc)
8847 {
8848 if (eh->elf.root.u.def.value > toc_inf->toc->rawsize)
8849 i = toc_inf->toc->rawsize >> 3;
8850 else
8851 i = eh->elf.root.u.def.value >> 3;
8852
8853 if ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0)
8854 {
8855 _bfd_error_handler
8856 (_("%s defined on removed toc entry"), eh->elf.root.root.string);
8857 do
8858 ++i;
8859 while ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0);
8860 eh->elf.root.u.def.value = (bfd_vma) i << 3;
8861 }
8862
8863 eh->elf.root.u.def.value -= toc_inf->skip[i];
8864 eh->adjust_done = 1;
8865 }
8866 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
8867 toc_inf->global_toc_syms = TRUE;
8868
8869 return TRUE;
8870 }
8871
8872 /* Return TRUE iff INSN is one we expect on a _LO variety toc/got reloc. */
8873
8874 static bfd_boolean
8875 ok_lo_toc_insn (unsigned int insn)
8876 {
8877 return ((insn & (0x3f << 26)) == 14u << 26 /* addi */
8878 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
8879 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
8880 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
8881 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
8882 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
8883 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
8884 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
8885 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
8886 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
8887 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
8888 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
8889 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
8890 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
8891 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
8892 && (insn & 3) != 1)
8893 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
8894 && ((insn & 3) == 0 || (insn & 3) == 3))
8895 || (insn & (0x3f << 26)) == 12u << 26 /* addic */);
8896 }
8897
8898 /* Examine all relocs referencing .toc sections in order to remove
8899 unused .toc entries. */
8900
8901 bfd_boolean
8902 ppc64_elf_edit_toc (struct bfd_link_info *info)
8903 {
8904 bfd *ibfd;
8905 struct adjust_toc_info toc_inf;
8906 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8907
8908 htab->do_toc_opt = 1;
8909 toc_inf.global_toc_syms = TRUE;
8910 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
8911 {
8912 asection *toc, *sec;
8913 Elf_Internal_Shdr *symtab_hdr;
8914 Elf_Internal_Sym *local_syms;
8915 Elf_Internal_Rela *relstart, *rel, *toc_relocs;
8916 unsigned long *skip, *drop;
8917 unsigned char *used;
8918 unsigned char *keep, last, some_unused;
8919
8920 if (!is_ppc64_elf (ibfd))
8921 continue;
8922
8923 toc = bfd_get_section_by_name (ibfd, ".toc");
8924 if (toc == NULL
8925 || toc->size == 0
8926 || toc->sec_info_type == SEC_INFO_TYPE_JUST_SYMS
8927 || discarded_section (toc))
8928 continue;
8929
8930 toc_relocs = NULL;
8931 local_syms = NULL;
8932 symtab_hdr = &elf_symtab_hdr (ibfd);
8933
8934 /* Look at sections dropped from the final link. */
8935 skip = NULL;
8936 relstart = NULL;
8937 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8938 {
8939 if (sec->reloc_count == 0
8940 || !discarded_section (sec)
8941 || get_opd_info (sec)
8942 || (sec->flags & SEC_ALLOC) == 0
8943 || (sec->flags & SEC_DEBUGGING) != 0)
8944 continue;
8945
8946 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
8947 if (relstart == NULL)
8948 goto error_ret;
8949
8950 /* Run through the relocs to see which toc entries might be
8951 unused. */
8952 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8953 {
8954 enum elf_ppc64_reloc_type r_type;
8955 unsigned long r_symndx;
8956 asection *sym_sec;
8957 struct elf_link_hash_entry *h;
8958 Elf_Internal_Sym *sym;
8959 bfd_vma val;
8960
8961 r_type = ELF64_R_TYPE (rel->r_info);
8962 switch (r_type)
8963 {
8964 default:
8965 continue;
8966
8967 case R_PPC64_TOC16:
8968 case R_PPC64_TOC16_LO:
8969 case R_PPC64_TOC16_HI:
8970 case R_PPC64_TOC16_HA:
8971 case R_PPC64_TOC16_DS:
8972 case R_PPC64_TOC16_LO_DS:
8973 break;
8974 }
8975
8976 r_symndx = ELF64_R_SYM (rel->r_info);
8977 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8978 r_symndx, ibfd))
8979 goto error_ret;
8980
8981 if (sym_sec != toc)
8982 continue;
8983
8984 if (h != NULL)
8985 val = h->root.u.def.value;
8986 else
8987 val = sym->st_value;
8988 val += rel->r_addend;
8989
8990 if (val >= toc->size)
8991 continue;
8992
8993 /* Anything in the toc ought to be aligned to 8 bytes.
8994 If not, don't mark as unused. */
8995 if (val & 7)
8996 continue;
8997
8998 if (skip == NULL)
8999 {
9000 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
9001 if (skip == NULL)
9002 goto error_ret;
9003 }
9004
9005 skip[val >> 3] = ref_from_discarded;
9006 }
9007
9008 if (elf_section_data (sec)->relocs != relstart)
9009 free (relstart);
9010 }
9011
9012 /* For largetoc loads of address constants, we can convert
9013 . addis rx,2,addr@got@ha
9014 . ld ry,addr@got@l(rx)
9015 to
9016 . addis rx,2,addr@toc@ha
9017 . addi ry,rx,addr@toc@l
9018 when addr is within 2G of the toc pointer. This then means
9019 that the word storing "addr" in the toc is no longer needed. */
9020
9021 if (!ppc64_elf_tdata (ibfd)->has_small_toc_reloc
9022 && toc->output_section->rawsize < (bfd_vma) 1 << 31
9023 && toc->reloc_count != 0)
9024 {
9025 /* Read toc relocs. */
9026 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
9027 info->keep_memory);
9028 if (toc_relocs == NULL)
9029 goto error_ret;
9030
9031 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
9032 {
9033 enum elf_ppc64_reloc_type r_type;
9034 unsigned long r_symndx;
9035 asection *sym_sec;
9036 struct elf_link_hash_entry *h;
9037 Elf_Internal_Sym *sym;
9038 bfd_vma val, addr;
9039
9040 r_type = ELF64_R_TYPE (rel->r_info);
9041 if (r_type != R_PPC64_ADDR64)
9042 continue;
9043
9044 r_symndx = ELF64_R_SYM (rel->r_info);
9045 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9046 r_symndx, ibfd))
9047 goto error_ret;
9048
9049 if (sym_sec == NULL
9050 || sym_sec->output_section == NULL
9051 || discarded_section (sym_sec))
9052 continue;
9053
9054 if (!SYMBOL_REFERENCES_LOCAL (info, h))
9055 continue;
9056
9057 if (h != NULL)
9058 {
9059 if (h->type == STT_GNU_IFUNC)
9060 continue;
9061 val = h->root.u.def.value;
9062 }
9063 else
9064 {
9065 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
9066 continue;
9067 val = sym->st_value;
9068 }
9069 val += rel->r_addend;
9070 val += sym_sec->output_section->vma + sym_sec->output_offset;
9071
9072 /* We don't yet know the exact toc pointer value, but we
9073 know it will be somewhere in the toc section. Don't
9074 optimize if the difference from any possible toc
9075 pointer is outside [ff..f80008000, 7fff7fff]. */
9076 addr = toc->output_section->vma + TOC_BASE_OFF;
9077 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
9078 continue;
9079
9080 addr = toc->output_section->vma + toc->output_section->rawsize;
9081 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
9082 continue;
9083
9084 if (skip == NULL)
9085 {
9086 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
9087 if (skip == NULL)
9088 goto error_ret;
9089 }
9090
9091 skip[rel->r_offset >> 3]
9092 |= can_optimize | ((rel - toc_relocs) << 2);
9093 }
9094 }
9095
9096 if (skip == NULL)
9097 continue;
9098
9099 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
9100 if (used == NULL)
9101 {
9102 error_ret:
9103 if (local_syms != NULL
9104 && symtab_hdr->contents != (unsigned char *) local_syms)
9105 free (local_syms);
9106 if (sec != NULL
9107 && relstart != NULL
9108 && elf_section_data (sec)->relocs != relstart)
9109 free (relstart);
9110 if (toc_relocs != NULL
9111 && elf_section_data (toc)->relocs != toc_relocs)
9112 free (toc_relocs);
9113 if (skip != NULL)
9114 free (skip);
9115 return FALSE;
9116 }
9117
9118 /* Now check all kept sections that might reference the toc.
9119 Check the toc itself last. */
9120 for (sec = (ibfd->sections == toc && toc->next ? toc->next
9121 : ibfd->sections);
9122 sec != NULL;
9123 sec = (sec == toc ? NULL
9124 : sec->next == NULL ? toc
9125 : sec->next == toc && toc->next ? toc->next
9126 : sec->next))
9127 {
9128 int repeat;
9129
9130 if (sec->reloc_count == 0
9131 || discarded_section (sec)
9132 || get_opd_info (sec)
9133 || (sec->flags & SEC_ALLOC) == 0
9134 || (sec->flags & SEC_DEBUGGING) != 0)
9135 continue;
9136
9137 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
9138 info->keep_memory);
9139 if (relstart == NULL)
9140 {
9141 free (used);
9142 goto error_ret;
9143 }
9144
9145 /* Mark toc entries referenced as used. */
9146 do
9147 {
9148 repeat = 0;
9149 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
9150 {
9151 enum elf_ppc64_reloc_type r_type;
9152 unsigned long r_symndx;
9153 asection *sym_sec;
9154 struct elf_link_hash_entry *h;
9155 Elf_Internal_Sym *sym;
9156 bfd_vma val;
9157 enum {no_check, check_lo, check_ha} insn_check;
9158
9159 r_type = ELF64_R_TYPE (rel->r_info);
9160 switch (r_type)
9161 {
9162 default:
9163 insn_check = no_check;
9164 break;
9165
9166 case R_PPC64_GOT_TLSLD16_HA:
9167 case R_PPC64_GOT_TLSGD16_HA:
9168 case R_PPC64_GOT_TPREL16_HA:
9169 case R_PPC64_GOT_DTPREL16_HA:
9170 case R_PPC64_GOT16_HA:
9171 case R_PPC64_TOC16_HA:
9172 insn_check = check_ha;
9173 break;
9174
9175 case R_PPC64_GOT_TLSLD16_LO:
9176 case R_PPC64_GOT_TLSGD16_LO:
9177 case R_PPC64_GOT_TPREL16_LO_DS:
9178 case R_PPC64_GOT_DTPREL16_LO_DS:
9179 case R_PPC64_GOT16_LO:
9180 case R_PPC64_GOT16_LO_DS:
9181 case R_PPC64_TOC16_LO:
9182 case R_PPC64_TOC16_LO_DS:
9183 insn_check = check_lo;
9184 break;
9185 }
9186
9187 if (insn_check != no_check)
9188 {
9189 bfd_vma off = rel->r_offset & ~3;
9190 unsigned char buf[4];
9191 unsigned int insn;
9192
9193 if (!bfd_get_section_contents (ibfd, sec, buf, off, 4))
9194 {
9195 free (used);
9196 goto error_ret;
9197 }
9198 insn = bfd_get_32 (ibfd, buf);
9199 if (insn_check == check_lo
9200 ? !ok_lo_toc_insn (insn)
9201 : ((insn & ((0x3f << 26) | 0x1f << 16))
9202 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */))
9203 {
9204 char str[12];
9205
9206 ppc64_elf_tdata (ibfd)->unexpected_toc_insn = 1;
9207 sprintf (str, "%#08x", insn);
9208 info->callbacks->einfo
9209 (_("%P: %H: toc optimization is not supported for"
9210 " %s instruction.\n"),
9211 ibfd, sec, rel->r_offset & ~3, str);
9212 }
9213 }
9214
9215 switch (r_type)
9216 {
9217 case R_PPC64_TOC16:
9218 case R_PPC64_TOC16_LO:
9219 case R_PPC64_TOC16_HI:
9220 case R_PPC64_TOC16_HA:
9221 case R_PPC64_TOC16_DS:
9222 case R_PPC64_TOC16_LO_DS:
9223 /* In case we're taking addresses of toc entries. */
9224 case R_PPC64_ADDR64:
9225 break;
9226
9227 default:
9228 continue;
9229 }
9230
9231 r_symndx = ELF64_R_SYM (rel->r_info);
9232 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9233 r_symndx, ibfd))
9234 {
9235 free (used);
9236 goto error_ret;
9237 }
9238
9239 if (sym_sec != toc)
9240 continue;
9241
9242 if (h != NULL)
9243 val = h->root.u.def.value;
9244 else
9245 val = sym->st_value;
9246 val += rel->r_addend;
9247
9248 if (val >= toc->size)
9249 continue;
9250
9251 if ((skip[val >> 3] & can_optimize) != 0)
9252 {
9253 bfd_vma off;
9254 unsigned char opc;
9255
9256 switch (r_type)
9257 {
9258 case R_PPC64_TOC16_HA:
9259 break;
9260
9261 case R_PPC64_TOC16_LO_DS:
9262 off = rel->r_offset;
9263 off += (bfd_big_endian (ibfd) ? -2 : 3);
9264 if (!bfd_get_section_contents (ibfd, sec, &opc,
9265 off, 1))
9266 {
9267 free (used);
9268 goto error_ret;
9269 }
9270 if ((opc & (0x3f << 2)) == (58u << 2))
9271 break;
9272 /* Fall through. */
9273
9274 default:
9275 /* Wrong sort of reloc, or not a ld. We may
9276 as well clear ref_from_discarded too. */
9277 skip[val >> 3] = 0;
9278 }
9279 }
9280
9281 if (sec != toc)
9282 used[val >> 3] = 1;
9283 /* For the toc section, we only mark as used if this
9284 entry itself isn't unused. */
9285 else if ((used[rel->r_offset >> 3]
9286 || !(skip[rel->r_offset >> 3] & ref_from_discarded))
9287 && !used[val >> 3])
9288 {
9289 /* Do all the relocs again, to catch reference
9290 chains. */
9291 repeat = 1;
9292 used[val >> 3] = 1;
9293 }
9294 }
9295 }
9296 while (repeat);
9297
9298 if (elf_section_data (sec)->relocs != relstart)
9299 free (relstart);
9300 }
9301
9302 /* Merge the used and skip arrays. Assume that TOC
9303 doublewords not appearing as either used or unused belong
9304 to to an entry more than one doubleword in size. */
9305 for (drop = skip, keep = used, last = 0, some_unused = 0;
9306 drop < skip + (toc->size + 7) / 8;
9307 ++drop, ++keep)
9308 {
9309 if (*keep)
9310 {
9311 *drop &= ~ref_from_discarded;
9312 if ((*drop & can_optimize) != 0)
9313 some_unused = 1;
9314 last = 0;
9315 }
9316 else if ((*drop & ref_from_discarded) != 0)
9317 {
9318 some_unused = 1;
9319 last = ref_from_discarded;
9320 }
9321 else
9322 *drop = last;
9323 }
9324
9325 free (used);
9326
9327 if (some_unused)
9328 {
9329 bfd_byte *contents, *src;
9330 unsigned long off;
9331 Elf_Internal_Sym *sym;
9332 bfd_boolean local_toc_syms = FALSE;
9333
9334 /* Shuffle the toc contents, and at the same time convert the
9335 skip array from booleans into offsets. */
9336 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
9337 goto error_ret;
9338
9339 elf_section_data (toc)->this_hdr.contents = contents;
9340
9341 for (src = contents, off = 0, drop = skip;
9342 src < contents + toc->size;
9343 src += 8, ++drop)
9344 {
9345 if ((*drop & (can_optimize | ref_from_discarded)) != 0)
9346 off += 8;
9347 else if (off != 0)
9348 {
9349 *drop = off;
9350 memcpy (src - off, src, 8);
9351 }
9352 }
9353 *drop = off;
9354 toc->rawsize = toc->size;
9355 toc->size = src - contents - off;
9356
9357 /* Adjust addends for relocs against the toc section sym,
9358 and optimize any accesses we can. */
9359 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
9360 {
9361 if (sec->reloc_count == 0
9362 || discarded_section (sec))
9363 continue;
9364
9365 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
9366 info->keep_memory);
9367 if (relstart == NULL)
9368 goto error_ret;
9369
9370 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
9371 {
9372 enum elf_ppc64_reloc_type r_type;
9373 unsigned long r_symndx;
9374 asection *sym_sec;
9375 struct elf_link_hash_entry *h;
9376 bfd_vma val;
9377
9378 r_type = ELF64_R_TYPE (rel->r_info);
9379 switch (r_type)
9380 {
9381 default:
9382 continue;
9383
9384 case R_PPC64_TOC16:
9385 case R_PPC64_TOC16_LO:
9386 case R_PPC64_TOC16_HI:
9387 case R_PPC64_TOC16_HA:
9388 case R_PPC64_TOC16_DS:
9389 case R_PPC64_TOC16_LO_DS:
9390 case R_PPC64_ADDR64:
9391 break;
9392 }
9393
9394 r_symndx = ELF64_R_SYM (rel->r_info);
9395 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9396 r_symndx, ibfd))
9397 goto error_ret;
9398
9399 if (sym_sec != toc)
9400 continue;
9401
9402 if (h != NULL)
9403 val = h->root.u.def.value;
9404 else
9405 {
9406 val = sym->st_value;
9407 if (val != 0)
9408 local_toc_syms = TRUE;
9409 }
9410
9411 val += rel->r_addend;
9412
9413 if (val > toc->rawsize)
9414 val = toc->rawsize;
9415 else if ((skip[val >> 3] & ref_from_discarded) != 0)
9416 continue;
9417 else if ((skip[val >> 3] & can_optimize) != 0)
9418 {
9419 Elf_Internal_Rela *tocrel
9420 = toc_relocs + (skip[val >> 3] >> 2);
9421 unsigned long tsym = ELF64_R_SYM (tocrel->r_info);
9422
9423 switch (r_type)
9424 {
9425 case R_PPC64_TOC16_HA:
9426 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_TOC16_HA);
9427 break;
9428
9429 case R_PPC64_TOC16_LO_DS:
9430 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_LO_DS_OPT);
9431 break;
9432
9433 default:
9434 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
9435 ppc_howto_init ();
9436 info->callbacks->einfo
9437 (_("%P: %H: %s references "
9438 "optimized away TOC entry\n"),
9439 ibfd, sec, rel->r_offset,
9440 ppc64_elf_howto_table[r_type]->name);
9441 bfd_set_error (bfd_error_bad_value);
9442 goto error_ret;
9443 }
9444 rel->r_addend = tocrel->r_addend;
9445 elf_section_data (sec)->relocs = relstart;
9446 continue;
9447 }
9448
9449 if (h != NULL || sym->st_value != 0)
9450 continue;
9451
9452 rel->r_addend -= skip[val >> 3];
9453 elf_section_data (sec)->relocs = relstart;
9454 }
9455
9456 if (elf_section_data (sec)->relocs != relstart)
9457 free (relstart);
9458 }
9459
9460 /* We shouldn't have local or global symbols defined in the TOC,
9461 but handle them anyway. */
9462 if (local_syms != NULL)
9463 for (sym = local_syms;
9464 sym < local_syms + symtab_hdr->sh_info;
9465 ++sym)
9466 if (sym->st_value != 0
9467 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
9468 {
9469 unsigned long i;
9470
9471 if (sym->st_value > toc->rawsize)
9472 i = toc->rawsize >> 3;
9473 else
9474 i = sym->st_value >> 3;
9475
9476 if ((skip[i] & (ref_from_discarded | can_optimize)) != 0)
9477 {
9478 if (local_toc_syms)
9479 _bfd_error_handler
9480 (_("%s defined on removed toc entry"),
9481 bfd_elf_sym_name (ibfd, symtab_hdr, sym, NULL));
9482 do
9483 ++i;
9484 while ((skip[i] & (ref_from_discarded | can_optimize)));
9485 sym->st_value = (bfd_vma) i << 3;
9486 }
9487
9488 sym->st_value -= skip[i];
9489 symtab_hdr->contents = (unsigned char *) local_syms;
9490 }
9491
9492 /* Adjust any global syms defined in this toc input section. */
9493 if (toc_inf.global_toc_syms)
9494 {
9495 toc_inf.toc = toc;
9496 toc_inf.skip = skip;
9497 toc_inf.global_toc_syms = FALSE;
9498 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
9499 &toc_inf);
9500 }
9501
9502 if (toc->reloc_count != 0)
9503 {
9504 Elf_Internal_Shdr *rel_hdr;
9505 Elf_Internal_Rela *wrel;
9506 bfd_size_type sz;
9507
9508 /* Remove unused toc relocs, and adjust those we keep. */
9509 if (toc_relocs == NULL)
9510 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
9511 info->keep_memory);
9512 if (toc_relocs == NULL)
9513 goto error_ret;
9514
9515 wrel = toc_relocs;
9516 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
9517 if ((skip[rel->r_offset >> 3]
9518 & (ref_from_discarded | can_optimize)) == 0)
9519 {
9520 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
9521 wrel->r_info = rel->r_info;
9522 wrel->r_addend = rel->r_addend;
9523 ++wrel;
9524 }
9525 else if (!dec_dynrel_count (rel->r_info, toc, info,
9526 &local_syms, NULL, NULL))
9527 goto error_ret;
9528
9529 elf_section_data (toc)->relocs = toc_relocs;
9530 toc->reloc_count = wrel - toc_relocs;
9531 rel_hdr = _bfd_elf_single_rel_hdr (toc);
9532 sz = rel_hdr->sh_entsize;
9533 rel_hdr->sh_size = toc->reloc_count * sz;
9534 }
9535 }
9536 else if (toc_relocs != NULL
9537 && elf_section_data (toc)->relocs != toc_relocs)
9538 free (toc_relocs);
9539
9540 if (local_syms != NULL
9541 && symtab_hdr->contents != (unsigned char *) local_syms)
9542 {
9543 if (!info->keep_memory)
9544 free (local_syms);
9545 else
9546 symtab_hdr->contents = (unsigned char *) local_syms;
9547 }
9548 free (skip);
9549 }
9550
9551 return TRUE;
9552 }
9553
9554 /* Return true iff input section I references the TOC using
9555 instructions limited to +/-32k offsets. */
9556
9557 bfd_boolean
9558 ppc64_elf_has_small_toc_reloc (asection *i)
9559 {
9560 return (is_ppc64_elf (i->owner)
9561 && ppc64_elf_tdata (i->owner)->has_small_toc_reloc);
9562 }
9563
9564 /* Allocate space for one GOT entry. */
9565
9566 static void
9567 allocate_got (struct elf_link_hash_entry *h,
9568 struct bfd_link_info *info,
9569 struct got_entry *gent)
9570 {
9571 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9572 bfd_boolean dyn;
9573 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
9574 int entsize = (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)
9575 ? 16 : 8);
9576 int rentsize = (gent->tls_type & eh->tls_mask & TLS_GD
9577 ? 2 : 1) * sizeof (Elf64_External_Rela);
9578 asection *got = ppc64_elf_tdata (gent->owner)->got;
9579
9580 gent->got.offset = got->size;
9581 got->size += entsize;
9582
9583 dyn = htab->elf.dynamic_sections_created;
9584 if (h->type == STT_GNU_IFUNC)
9585 {
9586 htab->elf.irelplt->size += rentsize;
9587 htab->got_reli_size += rentsize;
9588 }
9589 else if ((bfd_link_pic (info)
9590 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
9591 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
9592 || h->root.type != bfd_link_hash_undefweak))
9593 {
9594 asection *relgot = ppc64_elf_tdata (gent->owner)->relgot;
9595 relgot->size += rentsize;
9596 }
9597 }
9598
9599 /* This function merges got entries in the same toc group. */
9600
9601 static void
9602 merge_got_entries (struct got_entry **pent)
9603 {
9604 struct got_entry *ent, *ent2;
9605
9606 for (ent = *pent; ent != NULL; ent = ent->next)
9607 if (!ent->is_indirect)
9608 for (ent2 = ent->next; ent2 != NULL; ent2 = ent2->next)
9609 if (!ent2->is_indirect
9610 && ent2->addend == ent->addend
9611 && ent2->tls_type == ent->tls_type
9612 && elf_gp (ent2->owner) == elf_gp (ent->owner))
9613 {
9614 ent2->is_indirect = TRUE;
9615 ent2->got.ent = ent;
9616 }
9617 }
9618
9619 /* Allocate space in .plt, .got and associated reloc sections for
9620 dynamic relocs. */
9621
9622 static bfd_boolean
9623 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
9624 {
9625 struct bfd_link_info *info;
9626 struct ppc_link_hash_table *htab;
9627 asection *s;
9628 struct ppc_link_hash_entry *eh;
9629 struct got_entry **pgent, *gent;
9630
9631 if (h->root.type == bfd_link_hash_indirect)
9632 return TRUE;
9633
9634 info = (struct bfd_link_info *) inf;
9635 htab = ppc_hash_table (info);
9636 if (htab == NULL)
9637 return FALSE;
9638
9639 eh = (struct ppc_link_hash_entry *) h;
9640 /* Run through the TLS GD got entries first if we're changing them
9641 to TPREL. */
9642 if ((eh->tls_mask & TLS_TPRELGD) != 0)
9643 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9644 if (gent->got.refcount > 0
9645 && (gent->tls_type & TLS_GD) != 0)
9646 {
9647 /* This was a GD entry that has been converted to TPREL. If
9648 there happens to be a TPREL entry we can use that one. */
9649 struct got_entry *ent;
9650 for (ent = h->got.glist; ent != NULL; ent = ent->next)
9651 if (ent->got.refcount > 0
9652 && (ent->tls_type & TLS_TPREL) != 0
9653 && ent->addend == gent->addend
9654 && ent->owner == gent->owner)
9655 {
9656 gent->got.refcount = 0;
9657 break;
9658 }
9659
9660 /* If not, then we'll be using our own TPREL entry. */
9661 if (gent->got.refcount != 0)
9662 gent->tls_type = TLS_TLS | TLS_TPREL;
9663 }
9664
9665 /* Remove any list entry that won't generate a word in the GOT before
9666 we call merge_got_entries. Otherwise we risk merging to empty
9667 entries. */
9668 pgent = &h->got.glist;
9669 while ((gent = *pgent) != NULL)
9670 if (gent->got.refcount > 0)
9671 {
9672 if ((gent->tls_type & TLS_LD) != 0
9673 && !h->def_dynamic)
9674 {
9675 ppc64_tlsld_got (gent->owner)->got.refcount += 1;
9676 *pgent = gent->next;
9677 }
9678 else
9679 pgent = &gent->next;
9680 }
9681 else
9682 *pgent = gent->next;
9683
9684 if (!htab->do_multi_toc)
9685 merge_got_entries (&h->got.glist);
9686
9687 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9688 if (!gent->is_indirect)
9689 {
9690 /* Make sure this symbol is output as a dynamic symbol.
9691 Undefined weak syms won't yet be marked as dynamic,
9692 nor will all TLS symbols. */
9693 if (h->dynindx == -1
9694 && !h->forced_local
9695 && h->type != STT_GNU_IFUNC
9696 && htab->elf.dynamic_sections_created)
9697 {
9698 if (! bfd_elf_link_record_dynamic_symbol (info, h))
9699 return FALSE;
9700 }
9701
9702 if (!is_ppc64_elf (gent->owner))
9703 abort ();
9704
9705 allocate_got (h, info, gent);
9706 }
9707
9708 if (!htab->elf.dynamic_sections_created
9709 && h->type != STT_GNU_IFUNC)
9710 eh->dyn_relocs = NULL;
9711
9712 if (eh->dyn_relocs != NULL)
9713 {
9714 struct elf_dyn_relocs *p, **pp;
9715
9716 /* In the shared -Bsymbolic case, discard space allocated for
9717 dynamic pc-relative relocs against symbols which turn out to
9718 be defined in regular objects. For the normal shared case,
9719 discard space for relocs that have become local due to symbol
9720 visibility changes. */
9721
9722 if (bfd_link_pic (info))
9723 {
9724 /* Relocs that use pc_count are those that appear on a call
9725 insn, or certain REL relocs (see must_be_dyn_reloc) that
9726 can be generated via assembly. We want calls to
9727 protected symbols to resolve directly to the function
9728 rather than going via the plt. If people want function
9729 pointer comparisons to work as expected then they should
9730 avoid writing weird assembly. */
9731 if (SYMBOL_CALLS_LOCAL (info, h))
9732 {
9733 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
9734 {
9735 p->count -= p->pc_count;
9736 p->pc_count = 0;
9737 if (p->count == 0)
9738 *pp = p->next;
9739 else
9740 pp = &p->next;
9741 }
9742 }
9743
9744 /* Also discard relocs on undefined weak syms with
9745 non-default visibility. */
9746 if (eh->dyn_relocs != NULL
9747 && h->root.type == bfd_link_hash_undefweak)
9748 {
9749 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
9750 eh->dyn_relocs = NULL;
9751
9752 /* Make sure this symbol is output as a dynamic symbol.
9753 Undefined weak syms won't yet be marked as dynamic. */
9754 else if (h->dynindx == -1
9755 && !h->forced_local)
9756 {
9757 if (! bfd_elf_link_record_dynamic_symbol (info, h))
9758 return FALSE;
9759 }
9760 }
9761 }
9762 else if (h->type == STT_GNU_IFUNC)
9763 {
9764 /* A plt entry is always created when making direct calls to
9765 an ifunc, even when building a static executable, but
9766 that doesn't cover all cases. We may have only an ifunc
9767 initialised function pointer for a given ifunc symbol.
9768
9769 For ELFv2, dynamic relocations are not required when
9770 generating a global entry PLT stub. */
9771 if (abiversion (info->output_bfd) >= 2)
9772 {
9773 if (global_entry_stub (h))
9774 eh->dyn_relocs = NULL;
9775 }
9776
9777 /* For ELFv1 we have function descriptors. Descriptors need
9778 to be treated like PLT entries and thus have dynamic
9779 relocations. One exception is when the function
9780 descriptor is copied into .dynbss (which should only
9781 happen with ancient versions of gcc). */
9782 else if (h->needs_copy)
9783 eh->dyn_relocs = NULL;
9784 }
9785 else if (ELIMINATE_COPY_RELOCS)
9786 {
9787 /* For the non-pic case, discard space for relocs against
9788 symbols which turn out to need copy relocs or are not
9789 dynamic. */
9790
9791 /* First make sure this symbol is output as a dynamic symbol.
9792 Undefined weak syms won't yet be marked as dynamic. */
9793 if (h->root.type == bfd_link_hash_undefweak
9794 && !h->non_got_ref
9795 && !h->def_regular
9796 && h->dynindx == -1
9797 && !h->forced_local
9798 && !bfd_elf_link_record_dynamic_symbol (info, h))
9799 return FALSE;
9800
9801 if (h->non_got_ref
9802 || h->def_regular
9803 || h->dynindx == -1)
9804 eh->dyn_relocs = NULL;
9805 }
9806
9807 /* Finally, allocate space. */
9808 for (p = eh->dyn_relocs; p != NULL; p = p->next)
9809 {
9810 asection *sreloc = elf_section_data (p->sec)->sreloc;
9811 if (eh->elf.type == STT_GNU_IFUNC)
9812 sreloc = htab->elf.irelplt;
9813 sreloc->size += p->count * sizeof (Elf64_External_Rela);
9814 }
9815 }
9816
9817 if ((htab->elf.dynamic_sections_created
9818 && h->dynindx != -1
9819 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, bfd_link_pic (info), h))
9820 || h->type == STT_GNU_IFUNC)
9821 {
9822 struct plt_entry *pent;
9823 bfd_boolean doneone = FALSE;
9824 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
9825 if (pent->plt.refcount > 0)
9826 {
9827 if (!htab->elf.dynamic_sections_created
9828 || h->dynindx == -1)
9829 {
9830 s = htab->elf.iplt;
9831 pent->plt.offset = s->size;
9832 s->size += PLT_ENTRY_SIZE (htab);
9833 s = htab->elf.irelplt;
9834 }
9835 else
9836 {
9837 /* If this is the first .plt entry, make room for the special
9838 first entry. */
9839 s = htab->elf.splt;
9840 if (s->size == 0)
9841 s->size += PLT_INITIAL_ENTRY_SIZE (htab);
9842
9843 pent->plt.offset = s->size;
9844
9845 /* Make room for this entry. */
9846 s->size += PLT_ENTRY_SIZE (htab);
9847
9848 /* Make room for the .glink code. */
9849 s = htab->glink;
9850 if (s->size == 0)
9851 s->size += GLINK_CALL_STUB_SIZE;
9852 if (htab->opd_abi)
9853 {
9854 /* We need bigger stubs past index 32767. */
9855 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
9856 s->size += 4;
9857 s->size += 2*4;
9858 }
9859 else
9860 s->size += 4;
9861
9862 /* We also need to make an entry in the .rela.plt section. */
9863 s = htab->elf.srelplt;
9864 }
9865 s->size += sizeof (Elf64_External_Rela);
9866 doneone = TRUE;
9867 }
9868 else
9869 pent->plt.offset = (bfd_vma) -1;
9870 if (!doneone)
9871 {
9872 h->plt.plist = NULL;
9873 h->needs_plt = 0;
9874 }
9875 }
9876 else
9877 {
9878 h->plt.plist = NULL;
9879 h->needs_plt = 0;
9880 }
9881
9882 return TRUE;
9883 }
9884
9885 /* Called via elf_link_hash_traverse from ppc64_elf_size_dynamic_sections
9886 to set up space for global entry stubs. These are put in glink,
9887 after the branch table. */
9888
9889 static bfd_boolean
9890 size_global_entry_stubs (struct elf_link_hash_entry *h, void *inf)
9891 {
9892 struct bfd_link_info *info;
9893 struct ppc_link_hash_table *htab;
9894 struct plt_entry *pent;
9895 asection *s;
9896
9897 if (h->root.type == bfd_link_hash_indirect)
9898 return TRUE;
9899
9900 if (!h->pointer_equality_needed)
9901 return TRUE;
9902
9903 if (h->def_regular)
9904 return TRUE;
9905
9906 info = inf;
9907 htab = ppc_hash_table (info);
9908 if (htab == NULL)
9909 return FALSE;
9910
9911 s = htab->glink;
9912 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
9913 if (pent->plt.offset != (bfd_vma) -1
9914 && pent->addend == 0)
9915 {
9916 /* For ELFv2, if this symbol is not defined in a regular file
9917 and we are not generating a shared library or pie, then we
9918 need to define the symbol in the executable on a call stub.
9919 This is to avoid text relocations. */
9920 s->size = (s->size + 15) & -16;
9921 h->root.type = bfd_link_hash_defined;
9922 h->root.u.def.section = s;
9923 h->root.u.def.value = s->size;
9924 s->size += 16;
9925 break;
9926 }
9927 return TRUE;
9928 }
9929
9930 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
9931 read-only sections. */
9932
9933 static bfd_boolean
9934 maybe_set_textrel (struct elf_link_hash_entry *h, void *info)
9935 {
9936 if (h->root.type == bfd_link_hash_indirect)
9937 return TRUE;
9938
9939 if (readonly_dynrelocs (h))
9940 {
9941 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
9942
9943 /* Not an error, just cut short the traversal. */
9944 return FALSE;
9945 }
9946 return TRUE;
9947 }
9948
9949 /* Set the sizes of the dynamic sections. */
9950
9951 static bfd_boolean
9952 ppc64_elf_size_dynamic_sections (bfd *output_bfd,
9953 struct bfd_link_info *info)
9954 {
9955 struct ppc_link_hash_table *htab;
9956 bfd *dynobj;
9957 asection *s;
9958 bfd_boolean relocs;
9959 bfd *ibfd;
9960 struct got_entry *first_tlsld;
9961
9962 htab = ppc_hash_table (info);
9963 if (htab == NULL)
9964 return FALSE;
9965
9966 dynobj = htab->elf.dynobj;
9967 if (dynobj == NULL)
9968 abort ();
9969
9970 if (htab->elf.dynamic_sections_created)
9971 {
9972 /* Set the contents of the .interp section to the interpreter. */
9973 if (bfd_link_executable (info) && !info->nointerp)
9974 {
9975 s = bfd_get_linker_section (dynobj, ".interp");
9976 if (s == NULL)
9977 abort ();
9978 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
9979 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
9980 }
9981 }
9982
9983 /* Set up .got offsets for local syms, and space for local dynamic
9984 relocs. */
9985 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
9986 {
9987 struct got_entry **lgot_ents;
9988 struct got_entry **end_lgot_ents;
9989 struct plt_entry **local_plt;
9990 struct plt_entry **end_local_plt;
9991 unsigned char *lgot_masks;
9992 bfd_size_type locsymcount;
9993 Elf_Internal_Shdr *symtab_hdr;
9994
9995 if (!is_ppc64_elf (ibfd))
9996 continue;
9997
9998 for (s = ibfd->sections; s != NULL; s = s->next)
9999 {
10000 struct ppc_dyn_relocs *p;
10001
10002 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
10003 {
10004 if (!bfd_is_abs_section (p->sec)
10005 && bfd_is_abs_section (p->sec->output_section))
10006 {
10007 /* Input section has been discarded, either because
10008 it is a copy of a linkonce section or due to
10009 linker script /DISCARD/, so we'll be discarding
10010 the relocs too. */
10011 }
10012 else if (p->count != 0)
10013 {
10014 asection *srel = elf_section_data (p->sec)->sreloc;
10015 if (p->ifunc)
10016 srel = htab->elf.irelplt;
10017 srel->size += p->count * sizeof (Elf64_External_Rela);
10018 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
10019 info->flags |= DF_TEXTREL;
10020 }
10021 }
10022 }
10023
10024 lgot_ents = elf_local_got_ents (ibfd);
10025 if (!lgot_ents)
10026 continue;
10027
10028 symtab_hdr = &elf_symtab_hdr (ibfd);
10029 locsymcount = symtab_hdr->sh_info;
10030 end_lgot_ents = lgot_ents + locsymcount;
10031 local_plt = (struct plt_entry **) end_lgot_ents;
10032 end_local_plt = local_plt + locsymcount;
10033 lgot_masks = (unsigned char *) end_local_plt;
10034 s = ppc64_elf_tdata (ibfd)->got;
10035 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
10036 {
10037 struct got_entry **pent, *ent;
10038
10039 pent = lgot_ents;
10040 while ((ent = *pent) != NULL)
10041 if (ent->got.refcount > 0)
10042 {
10043 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
10044 {
10045 ppc64_tlsld_got (ibfd)->got.refcount += 1;
10046 *pent = ent->next;
10047 }
10048 else
10049 {
10050 unsigned int ent_size = 8;
10051 unsigned int rel_size = sizeof (Elf64_External_Rela);
10052
10053 ent->got.offset = s->size;
10054 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
10055 {
10056 ent_size *= 2;
10057 rel_size *= 2;
10058 }
10059 s->size += ent_size;
10060 if ((*lgot_masks & PLT_IFUNC) != 0)
10061 {
10062 htab->elf.irelplt->size += rel_size;
10063 htab->got_reli_size += rel_size;
10064 }
10065 else if (bfd_link_pic (info))
10066 {
10067 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
10068 srel->size += rel_size;
10069 }
10070 pent = &ent->next;
10071 }
10072 }
10073 else
10074 *pent = ent->next;
10075 }
10076
10077 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
10078 for (; local_plt < end_local_plt; ++local_plt)
10079 {
10080 struct plt_entry *ent;
10081
10082 for (ent = *local_plt; ent != NULL; ent = ent->next)
10083 if (ent->plt.refcount > 0)
10084 {
10085 s = htab->elf.iplt;
10086 ent->plt.offset = s->size;
10087 s->size += PLT_ENTRY_SIZE (htab);
10088
10089 htab->elf.irelplt->size += sizeof (Elf64_External_Rela);
10090 }
10091 else
10092 ent->plt.offset = (bfd_vma) -1;
10093 }
10094 }
10095
10096 /* Allocate global sym .plt and .got entries, and space for global
10097 sym dynamic relocs. */
10098 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
10099 /* Stash the end of glink branch table. */
10100 if (htab->glink != NULL)
10101 htab->glink->rawsize = htab->glink->size;
10102
10103 if (!htab->opd_abi && !bfd_link_pic (info))
10104 elf_link_hash_traverse (&htab->elf, size_global_entry_stubs, info);
10105
10106 first_tlsld = NULL;
10107 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
10108 {
10109 struct got_entry *ent;
10110
10111 if (!is_ppc64_elf (ibfd))
10112 continue;
10113
10114 ent = ppc64_tlsld_got (ibfd);
10115 if (ent->got.refcount > 0)
10116 {
10117 if (!htab->do_multi_toc && first_tlsld != NULL)
10118 {
10119 ent->is_indirect = TRUE;
10120 ent->got.ent = first_tlsld;
10121 }
10122 else
10123 {
10124 if (first_tlsld == NULL)
10125 first_tlsld = ent;
10126 s = ppc64_elf_tdata (ibfd)->got;
10127 ent->got.offset = s->size;
10128 ent->owner = ibfd;
10129 s->size += 16;
10130 if (bfd_link_pic (info))
10131 {
10132 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
10133 srel->size += sizeof (Elf64_External_Rela);
10134 }
10135 }
10136 }
10137 else
10138 ent->got.offset = (bfd_vma) -1;
10139 }
10140
10141 /* We now have determined the sizes of the various dynamic sections.
10142 Allocate memory for them. */
10143 relocs = FALSE;
10144 for (s = dynobj->sections; s != NULL; s = s->next)
10145 {
10146 if ((s->flags & SEC_LINKER_CREATED) == 0)
10147 continue;
10148
10149 if (s == htab->brlt || s == htab->relbrlt)
10150 /* These haven't been allocated yet; don't strip. */
10151 continue;
10152 else if (s == htab->elf.sgot
10153 || s == htab->elf.splt
10154 || s == htab->elf.iplt
10155 || s == htab->glink
10156 || s == htab->dynbss)
10157 {
10158 /* Strip this section if we don't need it; see the
10159 comment below. */
10160 }
10161 else if (s == htab->glink_eh_frame)
10162 {
10163 if (!bfd_is_abs_section (s->output_section))
10164 /* Not sized yet. */
10165 continue;
10166 }
10167 else if (CONST_STRNEQ (s->name, ".rela"))
10168 {
10169 if (s->size != 0)
10170 {
10171 if (s != htab->elf.srelplt)
10172 relocs = TRUE;
10173
10174 /* We use the reloc_count field as a counter if we need
10175 to copy relocs into the output file. */
10176 s->reloc_count = 0;
10177 }
10178 }
10179 else
10180 {
10181 /* It's not one of our sections, so don't allocate space. */
10182 continue;
10183 }
10184
10185 if (s->size == 0)
10186 {
10187 /* If we don't need this section, strip it from the
10188 output file. This is mostly to handle .rela.bss and
10189 .rela.plt. We must create both sections in
10190 create_dynamic_sections, because they must be created
10191 before the linker maps input sections to output
10192 sections. The linker does that before
10193 adjust_dynamic_symbol is called, and it is that
10194 function which decides whether anything needs to go
10195 into these sections. */
10196 s->flags |= SEC_EXCLUDE;
10197 continue;
10198 }
10199
10200 if ((s->flags & SEC_HAS_CONTENTS) == 0)
10201 continue;
10202
10203 /* Allocate memory for the section contents. We use bfd_zalloc
10204 here in case unused entries are not reclaimed before the
10205 section's contents are written out. This should not happen,
10206 but this way if it does we get a R_PPC64_NONE reloc in .rela
10207 sections instead of garbage.
10208 We also rely on the section contents being zero when writing
10209 the GOT. */
10210 s->contents = bfd_zalloc (dynobj, s->size);
10211 if (s->contents == NULL)
10212 return FALSE;
10213 }
10214
10215 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
10216 {
10217 if (!is_ppc64_elf (ibfd))
10218 continue;
10219
10220 s = ppc64_elf_tdata (ibfd)->got;
10221 if (s != NULL && s != htab->elf.sgot)
10222 {
10223 if (s->size == 0)
10224 s->flags |= SEC_EXCLUDE;
10225 else
10226 {
10227 s->contents = bfd_zalloc (ibfd, s->size);
10228 if (s->contents == NULL)
10229 return FALSE;
10230 }
10231 }
10232 s = ppc64_elf_tdata (ibfd)->relgot;
10233 if (s != NULL)
10234 {
10235 if (s->size == 0)
10236 s->flags |= SEC_EXCLUDE;
10237 else
10238 {
10239 s->contents = bfd_zalloc (ibfd, s->size);
10240 if (s->contents == NULL)
10241 return FALSE;
10242 relocs = TRUE;
10243 s->reloc_count = 0;
10244 }
10245 }
10246 }
10247
10248 if (htab->elf.dynamic_sections_created)
10249 {
10250 bfd_boolean tls_opt;
10251
10252 /* Add some entries to the .dynamic section. We fill in the
10253 values later, in ppc64_elf_finish_dynamic_sections, but we
10254 must add the entries now so that we get the correct size for
10255 the .dynamic section. The DT_DEBUG entry is filled in by the
10256 dynamic linker and used by the debugger. */
10257 #define add_dynamic_entry(TAG, VAL) \
10258 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
10259
10260 if (bfd_link_executable (info))
10261 {
10262 if (!add_dynamic_entry (DT_DEBUG, 0))
10263 return FALSE;
10264 }
10265
10266 if (htab->elf.splt != NULL && htab->elf.splt->size != 0)
10267 {
10268 if (!add_dynamic_entry (DT_PLTGOT, 0)
10269 || !add_dynamic_entry (DT_PLTRELSZ, 0)
10270 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
10271 || !add_dynamic_entry (DT_JMPREL, 0)
10272 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
10273 return FALSE;
10274 }
10275
10276 if (NO_OPD_RELOCS && abiversion (output_bfd) <= 1)
10277 {
10278 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
10279 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
10280 return FALSE;
10281 }
10282
10283 tls_opt = (htab->params->tls_get_addr_opt
10284 && htab->tls_get_addr_fd != NULL
10285 && htab->tls_get_addr_fd->elf.plt.plist != NULL);
10286 if (tls_opt || !htab->opd_abi)
10287 {
10288 if (!add_dynamic_entry (DT_PPC64_OPT, tls_opt ? PPC64_OPT_TLS : 0))
10289 return FALSE;
10290 }
10291
10292 if (relocs)
10293 {
10294 if (!add_dynamic_entry (DT_RELA, 0)
10295 || !add_dynamic_entry (DT_RELASZ, 0)
10296 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
10297 return FALSE;
10298
10299 /* If any dynamic relocs apply to a read-only section,
10300 then we need a DT_TEXTREL entry. */
10301 if ((info->flags & DF_TEXTREL) == 0)
10302 elf_link_hash_traverse (&htab->elf, maybe_set_textrel, info);
10303
10304 if ((info->flags & DF_TEXTREL) != 0)
10305 {
10306 if (!add_dynamic_entry (DT_TEXTREL, 0))
10307 return FALSE;
10308 }
10309 }
10310 }
10311 #undef add_dynamic_entry
10312
10313 return TRUE;
10314 }
10315
10316 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
10317
10318 static bfd_boolean
10319 ppc64_elf_hash_symbol (struct elf_link_hash_entry *h)
10320 {
10321 if (h->plt.plist != NULL
10322 && !h->def_regular
10323 && !h->pointer_equality_needed)
10324 return FALSE;
10325
10326 return _bfd_elf_hash_symbol (h);
10327 }
10328
10329 /* Determine the type of stub needed, if any, for a call. */
10330
10331 static inline enum ppc_stub_type
10332 ppc_type_of_stub (asection *input_sec,
10333 const Elf_Internal_Rela *rel,
10334 struct ppc_link_hash_entry **hash,
10335 struct plt_entry **plt_ent,
10336 bfd_vma destination,
10337 unsigned long local_off)
10338 {
10339 struct ppc_link_hash_entry *h = *hash;
10340 bfd_vma location;
10341 bfd_vma branch_offset;
10342 bfd_vma max_branch_offset;
10343 enum elf_ppc64_reloc_type r_type;
10344
10345 if (h != NULL)
10346 {
10347 struct plt_entry *ent;
10348 struct ppc_link_hash_entry *fdh = h;
10349 if (h->oh != NULL
10350 && h->oh->is_func_descriptor)
10351 {
10352 fdh = ppc_follow_link (h->oh);
10353 *hash = fdh;
10354 }
10355
10356 for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next)
10357 if (ent->addend == rel->r_addend
10358 && ent->plt.offset != (bfd_vma) -1)
10359 {
10360 *plt_ent = ent;
10361 return ppc_stub_plt_call;
10362 }
10363
10364 /* Here, we know we don't have a plt entry. If we don't have a
10365 either a defined function descriptor or a defined entry symbol
10366 in a regular object file, then it is pointless trying to make
10367 any other type of stub. */
10368 if (!is_static_defined (&fdh->elf)
10369 && !is_static_defined (&h->elf))
10370 return ppc_stub_none;
10371 }
10372 else if (elf_local_got_ents (input_sec->owner) != NULL)
10373 {
10374 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (input_sec->owner);
10375 struct plt_entry **local_plt = (struct plt_entry **)
10376 elf_local_got_ents (input_sec->owner) + symtab_hdr->sh_info;
10377 unsigned long r_symndx = ELF64_R_SYM (rel->r_info);
10378
10379 if (local_plt[r_symndx] != NULL)
10380 {
10381 struct plt_entry *ent;
10382
10383 for (ent = local_plt[r_symndx]; ent != NULL; ent = ent->next)
10384 if (ent->addend == rel->r_addend
10385 && ent->plt.offset != (bfd_vma) -1)
10386 {
10387 *plt_ent = ent;
10388 return ppc_stub_plt_call;
10389 }
10390 }
10391 }
10392
10393 /* Determine where the call point is. */
10394 location = (input_sec->output_offset
10395 + input_sec->output_section->vma
10396 + rel->r_offset);
10397
10398 branch_offset = destination - location;
10399 r_type = ELF64_R_TYPE (rel->r_info);
10400
10401 /* Determine if a long branch stub is needed. */
10402 max_branch_offset = 1 << 25;
10403 if (r_type != R_PPC64_REL24)
10404 max_branch_offset = 1 << 15;
10405
10406 if (branch_offset + max_branch_offset >= 2 * max_branch_offset - local_off)
10407 /* We need a stub. Figure out whether a long_branch or plt_branch
10408 is needed later. */
10409 return ppc_stub_long_branch;
10410
10411 return ppc_stub_none;
10412 }
10413
10414 /* With power7 weakly ordered memory model, it is possible for ld.so
10415 to update a plt entry in one thread and have another thread see a
10416 stale zero toc entry. To avoid this we need some sort of acquire
10417 barrier in the call stub. One solution is to make the load of the
10418 toc word seem to appear to depend on the load of the function entry
10419 word. Another solution is to test for r2 being zero, and branch to
10420 the appropriate glink entry if so.
10421
10422 . fake dep barrier compare
10423 . ld 12,xxx(2) ld 12,xxx(2)
10424 . mtctr 12 mtctr 12
10425 . xor 11,12,12 ld 2,xxx+8(2)
10426 . add 2,2,11 cmpldi 2,0
10427 . ld 2,xxx+8(2) bnectr+
10428 . bctr b <glink_entry>
10429
10430 The solution involving the compare turns out to be faster, so
10431 that's what we use unless the branch won't reach. */
10432
10433 #define ALWAYS_USE_FAKE_DEP 0
10434 #define ALWAYS_EMIT_R2SAVE 0
10435
10436 #define PPC_LO(v) ((v) & 0xffff)
10437 #define PPC_HI(v) (((v) >> 16) & 0xffff)
10438 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
10439
10440 static inline unsigned int
10441 plt_stub_size (struct ppc_link_hash_table *htab,
10442 struct ppc_stub_hash_entry *stub_entry,
10443 bfd_vma off)
10444 {
10445 unsigned size = 12;
10446
10447 if (ALWAYS_EMIT_R2SAVE
10448 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10449 size += 4;
10450 if (PPC_HA (off) != 0)
10451 size += 4;
10452 if (htab->opd_abi)
10453 {
10454 size += 4;
10455 if (htab->params->plt_static_chain)
10456 size += 4;
10457 if (htab->params->plt_thread_safe
10458 && htab->elf.dynamic_sections_created
10459 && stub_entry->h != NULL
10460 && stub_entry->h->elf.dynindx != -1)
10461 size += 8;
10462 if (PPC_HA (off + 8 + 8 * htab->params->plt_static_chain) != PPC_HA (off))
10463 size += 4;
10464 }
10465 if (stub_entry->h != NULL
10466 && (stub_entry->h == htab->tls_get_addr_fd
10467 || stub_entry->h == htab->tls_get_addr)
10468 && htab->params->tls_get_addr_opt)
10469 size += 13 * 4;
10470 return size;
10471 }
10472
10473 /* If this stub would cross fewer 2**plt_stub_align boundaries if we align,
10474 then return the padding needed to do so. */
10475 static inline unsigned int
10476 plt_stub_pad (struct ppc_link_hash_table *htab,
10477 struct ppc_stub_hash_entry *stub_entry,
10478 bfd_vma plt_off)
10479 {
10480 int stub_align = 1 << htab->params->plt_stub_align;
10481 unsigned stub_size = plt_stub_size (htab, stub_entry, plt_off);
10482 bfd_vma stub_off = stub_entry->group->stub_sec->size;
10483
10484 if (((stub_off + stub_size - 1) & -stub_align) - (stub_off & -stub_align)
10485 > ((stub_size - 1) & -stub_align))
10486 return stub_align - (stub_off & (stub_align - 1));
10487 return 0;
10488 }
10489
10490 /* Build a .plt call stub. */
10491
10492 static inline bfd_byte *
10493 build_plt_stub (struct ppc_link_hash_table *htab,
10494 struct ppc_stub_hash_entry *stub_entry,
10495 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
10496 {
10497 bfd *obfd = htab->params->stub_bfd;
10498 bfd_boolean plt_load_toc = htab->opd_abi;
10499 bfd_boolean plt_static_chain = htab->params->plt_static_chain;
10500 bfd_boolean plt_thread_safe = (htab->params->plt_thread_safe
10501 && htab->elf.dynamic_sections_created
10502 && stub_entry->h != NULL
10503 && stub_entry->h->elf.dynindx != -1);
10504 bfd_boolean use_fake_dep = plt_thread_safe;
10505 bfd_vma cmp_branch_off = 0;
10506
10507 if (!ALWAYS_USE_FAKE_DEP
10508 && plt_load_toc
10509 && plt_thread_safe
10510 && !((stub_entry->h == htab->tls_get_addr_fd
10511 || stub_entry->h == htab->tls_get_addr)
10512 && htab->params->tls_get_addr_opt))
10513 {
10514 bfd_vma pltoff = stub_entry->plt_ent->plt.offset & ~1;
10515 bfd_vma pltindex = ((pltoff - PLT_INITIAL_ENTRY_SIZE (htab))
10516 / PLT_ENTRY_SIZE (htab));
10517 bfd_vma glinkoff = GLINK_CALL_STUB_SIZE + pltindex * 8;
10518 bfd_vma to, from;
10519
10520 if (pltindex > 32768)
10521 glinkoff += (pltindex - 32768) * 4;
10522 to = (glinkoff
10523 + htab->glink->output_offset
10524 + htab->glink->output_section->vma);
10525 from = (p - stub_entry->group->stub_sec->contents
10526 + 4 * (ALWAYS_EMIT_R2SAVE
10527 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10528 + 4 * (PPC_HA (offset) != 0)
10529 + 4 * (PPC_HA (offset + 8 + 8 * plt_static_chain)
10530 != PPC_HA (offset))
10531 + 4 * (plt_static_chain != 0)
10532 + 20
10533 + stub_entry->group->stub_sec->output_offset
10534 + stub_entry->group->stub_sec->output_section->vma);
10535 cmp_branch_off = to - from;
10536 use_fake_dep = cmp_branch_off + (1 << 25) >= (1 << 26);
10537 }
10538
10539 if (PPC_HA (offset) != 0)
10540 {
10541 if (r != NULL)
10542 {
10543 if (ALWAYS_EMIT_R2SAVE
10544 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10545 r[0].r_offset += 4;
10546 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
10547 r[1].r_offset = r[0].r_offset + 4;
10548 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10549 r[1].r_addend = r[0].r_addend;
10550 if (plt_load_toc)
10551 {
10552 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10553 {
10554 r[2].r_offset = r[1].r_offset + 4;
10555 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO);
10556 r[2].r_addend = r[0].r_addend;
10557 }
10558 else
10559 {
10560 r[2].r_offset = r[1].r_offset + 8 + 8 * use_fake_dep;
10561 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10562 r[2].r_addend = r[0].r_addend + 8;
10563 if (plt_static_chain)
10564 {
10565 r[3].r_offset = r[2].r_offset + 4;
10566 r[3].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10567 r[3].r_addend = r[0].r_addend + 16;
10568 }
10569 }
10570 }
10571 }
10572 if (ALWAYS_EMIT_R2SAVE
10573 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10574 bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p), p += 4;
10575 if (plt_load_toc)
10576 {
10577 bfd_put_32 (obfd, ADDIS_R11_R2 | PPC_HA (offset), p), p += 4;
10578 bfd_put_32 (obfd, LD_R12_0R11 | PPC_LO (offset), p), p += 4;
10579 }
10580 else
10581 {
10582 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
10583 bfd_put_32 (obfd, LD_R12_0R12 | PPC_LO (offset), p), p += 4;
10584 }
10585 if (plt_load_toc
10586 && PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10587 {
10588 bfd_put_32 (obfd, ADDI_R11_R11 | PPC_LO (offset), p), p += 4;
10589 offset = 0;
10590 }
10591 bfd_put_32 (obfd, MTCTR_R12, p), p += 4;
10592 if (plt_load_toc)
10593 {
10594 if (use_fake_dep)
10595 {
10596 bfd_put_32 (obfd, XOR_R2_R12_R12, p), p += 4;
10597 bfd_put_32 (obfd, ADD_R11_R11_R2, p), p += 4;
10598 }
10599 bfd_put_32 (obfd, LD_R2_0R11 | PPC_LO (offset + 8), p), p += 4;
10600 if (plt_static_chain)
10601 bfd_put_32 (obfd, LD_R11_0R11 | PPC_LO (offset + 16), p), p += 4;
10602 }
10603 }
10604 else
10605 {
10606 if (r != NULL)
10607 {
10608 if (ALWAYS_EMIT_R2SAVE
10609 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10610 r[0].r_offset += 4;
10611 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10612 if (plt_load_toc)
10613 {
10614 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10615 {
10616 r[1].r_offset = r[0].r_offset + 4;
10617 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16);
10618 r[1].r_addend = r[0].r_addend;
10619 }
10620 else
10621 {
10622 r[1].r_offset = r[0].r_offset + 8 + 8 * use_fake_dep;
10623 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10624 r[1].r_addend = r[0].r_addend + 8 + 8 * plt_static_chain;
10625 if (plt_static_chain)
10626 {
10627 r[2].r_offset = r[1].r_offset + 4;
10628 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10629 r[2].r_addend = r[0].r_addend + 8;
10630 }
10631 }
10632 }
10633 }
10634 if (ALWAYS_EMIT_R2SAVE
10635 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10636 bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p), p += 4;
10637 bfd_put_32 (obfd, LD_R12_0R2 | PPC_LO (offset), p), p += 4;
10638 if (plt_load_toc
10639 && PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10640 {
10641 bfd_put_32 (obfd, ADDI_R2_R2 | PPC_LO (offset), p), p += 4;
10642 offset = 0;
10643 }
10644 bfd_put_32 (obfd, MTCTR_R12, p), p += 4;
10645 if (plt_load_toc)
10646 {
10647 if (use_fake_dep)
10648 {
10649 bfd_put_32 (obfd, XOR_R11_R12_R12, p), p += 4;
10650 bfd_put_32 (obfd, ADD_R2_R2_R11, p), p += 4;
10651 }
10652 if (plt_static_chain)
10653 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset + 16), p), p += 4;
10654 bfd_put_32 (obfd, LD_R2_0R2 | PPC_LO (offset + 8), p), p += 4;
10655 }
10656 }
10657 if (plt_load_toc && plt_thread_safe && !use_fake_dep)
10658 {
10659 bfd_put_32 (obfd, CMPLDI_R2_0, p), p += 4;
10660 bfd_put_32 (obfd, BNECTR_P4, p), p += 4;
10661 bfd_put_32 (obfd, B_DOT | (cmp_branch_off & 0x3fffffc), p), p += 4;
10662 }
10663 else
10664 bfd_put_32 (obfd, BCTR, p), p += 4;
10665 return p;
10666 }
10667
10668 /* Build a special .plt call stub for __tls_get_addr. */
10669
10670 #define LD_R11_0R3 0xe9630000
10671 #define LD_R12_0R3 0xe9830000
10672 #define MR_R0_R3 0x7c601b78
10673 #define CMPDI_R11_0 0x2c2b0000
10674 #define ADD_R3_R12_R13 0x7c6c6a14
10675 #define BEQLR 0x4d820020
10676 #define MR_R3_R0 0x7c030378
10677 #define STD_R11_0R1 0xf9610000
10678 #define BCTRL 0x4e800421
10679 #define LD_R11_0R1 0xe9610000
10680 #define MTLR_R11 0x7d6803a6
10681
10682 static inline bfd_byte *
10683 build_tls_get_addr_stub (struct ppc_link_hash_table *htab,
10684 struct ppc_stub_hash_entry *stub_entry,
10685 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
10686 {
10687 bfd *obfd = htab->params->stub_bfd;
10688
10689 bfd_put_32 (obfd, LD_R11_0R3 + 0, p), p += 4;
10690 bfd_put_32 (obfd, LD_R12_0R3 + 8, p), p += 4;
10691 bfd_put_32 (obfd, MR_R0_R3, p), p += 4;
10692 bfd_put_32 (obfd, CMPDI_R11_0, p), p += 4;
10693 bfd_put_32 (obfd, ADD_R3_R12_R13, p), p += 4;
10694 bfd_put_32 (obfd, BEQLR, p), p += 4;
10695 bfd_put_32 (obfd, MR_R3_R0, p), p += 4;
10696 bfd_put_32 (obfd, MFLR_R11, p), p += 4;
10697 bfd_put_32 (obfd, STD_R11_0R1 + STK_LINKER (htab), p), p += 4;
10698
10699 if (r != NULL)
10700 r[0].r_offset += 9 * 4;
10701 p = build_plt_stub (htab, stub_entry, p, offset, r);
10702 bfd_put_32 (obfd, BCTRL, p - 4);
10703
10704 bfd_put_32 (obfd, LD_R2_0R1 + STK_TOC (htab), p), p += 4;
10705 bfd_put_32 (obfd, LD_R11_0R1 + STK_LINKER (htab), p), p += 4;
10706 bfd_put_32 (obfd, MTLR_R11, p), p += 4;
10707 bfd_put_32 (obfd, BLR, p), p += 4;
10708
10709 return p;
10710 }
10711
10712 static Elf_Internal_Rela *
10713 get_relocs (asection *sec, int count)
10714 {
10715 Elf_Internal_Rela *relocs;
10716 struct bfd_elf_section_data *elfsec_data;
10717
10718 elfsec_data = elf_section_data (sec);
10719 relocs = elfsec_data->relocs;
10720 if (relocs == NULL)
10721 {
10722 bfd_size_type relsize;
10723 relsize = sec->reloc_count * sizeof (*relocs);
10724 relocs = bfd_alloc (sec->owner, relsize);
10725 if (relocs == NULL)
10726 return NULL;
10727 elfsec_data->relocs = relocs;
10728 elfsec_data->rela.hdr = bfd_zalloc (sec->owner,
10729 sizeof (Elf_Internal_Shdr));
10730 if (elfsec_data->rela.hdr == NULL)
10731 return NULL;
10732 elfsec_data->rela.hdr->sh_size = (sec->reloc_count
10733 * sizeof (Elf64_External_Rela));
10734 elfsec_data->rela.hdr->sh_entsize = sizeof (Elf64_External_Rela);
10735 sec->reloc_count = 0;
10736 }
10737 relocs += sec->reloc_count;
10738 sec->reloc_count += count;
10739 return relocs;
10740 }
10741
10742 static bfd_vma
10743 get_r2off (struct bfd_link_info *info,
10744 struct ppc_stub_hash_entry *stub_entry)
10745 {
10746 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10747 bfd_vma r2off = htab->sec_info[stub_entry->target_section->id].toc_off;
10748
10749 if (r2off == 0)
10750 {
10751 /* Support linking -R objects. Get the toc pointer from the
10752 opd entry. */
10753 char buf[8];
10754 if (!htab->opd_abi)
10755 return r2off;
10756 asection *opd = stub_entry->h->elf.root.u.def.section;
10757 bfd_vma opd_off = stub_entry->h->elf.root.u.def.value;
10758
10759 if (strcmp (opd->name, ".opd") != 0
10760 || opd->reloc_count != 0)
10761 {
10762 info->callbacks->einfo (_("%P: cannot find opd entry toc for `%T'\n"),
10763 stub_entry->h->elf.root.root.string);
10764 bfd_set_error (bfd_error_bad_value);
10765 return (bfd_vma) -1;
10766 }
10767 if (!bfd_get_section_contents (opd->owner, opd, buf, opd_off + 8, 8))
10768 return (bfd_vma) -1;
10769 r2off = bfd_get_64 (opd->owner, buf);
10770 r2off -= elf_gp (info->output_bfd);
10771 }
10772 r2off -= htab->sec_info[stub_entry->group->link_sec->id].toc_off;
10773 return r2off;
10774 }
10775
10776 static bfd_boolean
10777 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
10778 {
10779 struct ppc_stub_hash_entry *stub_entry;
10780 struct ppc_branch_hash_entry *br_entry;
10781 struct bfd_link_info *info;
10782 struct ppc_link_hash_table *htab;
10783 bfd_byte *loc;
10784 bfd_byte *p;
10785 bfd_vma dest, off;
10786 int size;
10787 Elf_Internal_Rela *r;
10788 asection *plt;
10789
10790 /* Massage our args to the form they really have. */
10791 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
10792 info = in_arg;
10793
10794 htab = ppc_hash_table (info);
10795 if (htab == NULL)
10796 return FALSE;
10797
10798 /* Make a note of the offset within the stubs for this entry. */
10799 stub_entry->stub_offset = stub_entry->group->stub_sec->size;
10800 loc = stub_entry->group->stub_sec->contents + stub_entry->stub_offset;
10801
10802 htab->stub_count[stub_entry->stub_type - 1] += 1;
10803 switch (stub_entry->stub_type)
10804 {
10805 case ppc_stub_long_branch:
10806 case ppc_stub_long_branch_r2off:
10807 /* Branches are relative. This is where we are going to. */
10808 dest = (stub_entry->target_value
10809 + stub_entry->target_section->output_offset
10810 + stub_entry->target_section->output_section->vma);
10811 dest += PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
10812 off = dest;
10813
10814 /* And this is where we are coming from. */
10815 off -= (stub_entry->stub_offset
10816 + stub_entry->group->stub_sec->output_offset
10817 + stub_entry->group->stub_sec->output_section->vma);
10818
10819 size = 4;
10820 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
10821 {
10822 bfd_vma r2off = get_r2off (info, stub_entry);
10823
10824 if (r2off == (bfd_vma) -1)
10825 {
10826 htab->stub_error = TRUE;
10827 return FALSE;
10828 }
10829 bfd_put_32 (htab->params->stub_bfd, STD_R2_0R1 + STK_TOC (htab), loc);
10830 loc += 4;
10831 size = 8;
10832 if (PPC_HA (r2off) != 0)
10833 {
10834 bfd_put_32 (htab->params->stub_bfd,
10835 ADDIS_R2_R2 | PPC_HA (r2off), loc);
10836 loc += 4;
10837 size += 4;
10838 }
10839 if (PPC_LO (r2off) != 0)
10840 {
10841 bfd_put_32 (htab->params->stub_bfd,
10842 ADDI_R2_R2 | PPC_LO (r2off), loc);
10843 loc += 4;
10844 size += 4;
10845 }
10846 off -= size - 4;
10847 }
10848 bfd_put_32 (htab->params->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
10849
10850 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
10851 {
10852 info->callbacks->einfo
10853 (_("%P: long branch stub `%s' offset overflow\n"),
10854 stub_entry->root.string);
10855 htab->stub_error = TRUE;
10856 return FALSE;
10857 }
10858
10859 if (info->emitrelocations)
10860 {
10861 r = get_relocs (stub_entry->group->stub_sec, 1);
10862 if (r == NULL)
10863 return FALSE;
10864 r->r_offset = loc - stub_entry->group->stub_sec->contents;
10865 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
10866 r->r_addend = dest;
10867 if (stub_entry->h != NULL)
10868 {
10869 struct elf_link_hash_entry **hashes;
10870 unsigned long symndx;
10871 struct ppc_link_hash_entry *h;
10872
10873 hashes = elf_sym_hashes (htab->params->stub_bfd);
10874 if (hashes == NULL)
10875 {
10876 bfd_size_type hsize;
10877
10878 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
10879 hashes = bfd_zalloc (htab->params->stub_bfd, hsize);
10880 if (hashes == NULL)
10881 return FALSE;
10882 elf_sym_hashes (htab->params->stub_bfd) = hashes;
10883 htab->stub_globals = 1;
10884 }
10885 symndx = htab->stub_globals++;
10886 h = stub_entry->h;
10887 hashes[symndx] = &h->elf;
10888 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
10889 if (h->oh != NULL && h->oh->is_func)
10890 h = ppc_follow_link (h->oh);
10891 if (h->elf.root.u.def.section != stub_entry->target_section)
10892 /* H is an opd symbol. The addend must be zero. */
10893 r->r_addend = 0;
10894 else
10895 {
10896 off = (h->elf.root.u.def.value
10897 + h->elf.root.u.def.section->output_offset
10898 + h->elf.root.u.def.section->output_section->vma);
10899 r->r_addend -= off;
10900 }
10901 }
10902 }
10903 break;
10904
10905 case ppc_stub_plt_branch:
10906 case ppc_stub_plt_branch_r2off:
10907 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
10908 stub_entry->root.string + 9,
10909 FALSE, FALSE);
10910 if (br_entry == NULL)
10911 {
10912 info->callbacks->einfo (_("%P: can't find branch stub `%s'\n"),
10913 stub_entry->root.string);
10914 htab->stub_error = TRUE;
10915 return FALSE;
10916 }
10917
10918 dest = (stub_entry->target_value
10919 + stub_entry->target_section->output_offset
10920 + stub_entry->target_section->output_section->vma);
10921 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
10922 dest += PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
10923
10924 bfd_put_64 (htab->brlt->owner, dest,
10925 htab->brlt->contents + br_entry->offset);
10926
10927 if (br_entry->iter == htab->stub_iteration)
10928 {
10929 br_entry->iter = 0;
10930
10931 if (htab->relbrlt != NULL)
10932 {
10933 /* Create a reloc for the branch lookup table entry. */
10934 Elf_Internal_Rela rela;
10935 bfd_byte *rl;
10936
10937 rela.r_offset = (br_entry->offset
10938 + htab->brlt->output_offset
10939 + htab->brlt->output_section->vma);
10940 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
10941 rela.r_addend = dest;
10942
10943 rl = htab->relbrlt->contents;
10944 rl += (htab->relbrlt->reloc_count++
10945 * sizeof (Elf64_External_Rela));
10946 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
10947 }
10948 else if (info->emitrelocations)
10949 {
10950 r = get_relocs (htab->brlt, 1);
10951 if (r == NULL)
10952 return FALSE;
10953 /* brlt, being SEC_LINKER_CREATED does not go through the
10954 normal reloc processing. Symbols and offsets are not
10955 translated from input file to output file form, so
10956 set up the offset per the output file. */
10957 r->r_offset = (br_entry->offset
10958 + htab->brlt->output_offset
10959 + htab->brlt->output_section->vma);
10960 r->r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
10961 r->r_addend = dest;
10962 }
10963 }
10964
10965 dest = (br_entry->offset
10966 + htab->brlt->output_offset
10967 + htab->brlt->output_section->vma);
10968
10969 off = (dest
10970 - elf_gp (htab->brlt->output_section->owner)
10971 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
10972
10973 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
10974 {
10975 info->callbacks->einfo
10976 (_("%P: linkage table error against `%T'\n"),
10977 stub_entry->root.string);
10978 bfd_set_error (bfd_error_bad_value);
10979 htab->stub_error = TRUE;
10980 return FALSE;
10981 }
10982
10983 if (info->emitrelocations)
10984 {
10985 r = get_relocs (stub_entry->group->stub_sec, 1 + (PPC_HA (off) != 0));
10986 if (r == NULL)
10987 return FALSE;
10988 r[0].r_offset = loc - stub_entry->group->stub_sec->contents;
10989 if (bfd_big_endian (info->output_bfd))
10990 r[0].r_offset += 2;
10991 if (stub_entry->stub_type == ppc_stub_plt_branch_r2off)
10992 r[0].r_offset += 4;
10993 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10994 r[0].r_addend = dest;
10995 if (PPC_HA (off) != 0)
10996 {
10997 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
10998 r[1].r_offset = r[0].r_offset + 4;
10999 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
11000 r[1].r_addend = r[0].r_addend;
11001 }
11002 }
11003
11004 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
11005 {
11006 if (PPC_HA (off) != 0)
11007 {
11008 size = 16;
11009 bfd_put_32 (htab->params->stub_bfd,
11010 ADDIS_R12_R2 | PPC_HA (off), loc);
11011 loc += 4;
11012 bfd_put_32 (htab->params->stub_bfd,
11013 LD_R12_0R12 | PPC_LO (off), loc);
11014 }
11015 else
11016 {
11017 size = 12;
11018 bfd_put_32 (htab->params->stub_bfd,
11019 LD_R12_0R2 | PPC_LO (off), loc);
11020 }
11021 }
11022 else
11023 {
11024 bfd_vma r2off = get_r2off (info, stub_entry);
11025
11026 if (r2off == (bfd_vma) -1)
11027 {
11028 htab->stub_error = TRUE;
11029 return FALSE;
11030 }
11031
11032 bfd_put_32 (htab->params->stub_bfd, STD_R2_0R1 + STK_TOC (htab), loc);
11033 loc += 4;
11034 size = 16;
11035 if (PPC_HA (off) != 0)
11036 {
11037 size += 4;
11038 bfd_put_32 (htab->params->stub_bfd,
11039 ADDIS_R12_R2 | PPC_HA (off), loc);
11040 loc += 4;
11041 bfd_put_32 (htab->params->stub_bfd,
11042 LD_R12_0R12 | PPC_LO (off), loc);
11043 }
11044 else
11045 bfd_put_32 (htab->params->stub_bfd, LD_R12_0R2 | PPC_LO (off), loc);
11046
11047 if (PPC_HA (r2off) != 0)
11048 {
11049 size += 4;
11050 loc += 4;
11051 bfd_put_32 (htab->params->stub_bfd,
11052 ADDIS_R2_R2 | PPC_HA (r2off), loc);
11053 }
11054 if (PPC_LO (r2off) != 0)
11055 {
11056 size += 4;
11057 loc += 4;
11058 bfd_put_32 (htab->params->stub_bfd,
11059 ADDI_R2_R2 | PPC_LO (r2off), loc);
11060 }
11061 }
11062 loc += 4;
11063 bfd_put_32 (htab->params->stub_bfd, MTCTR_R12, loc);
11064 loc += 4;
11065 bfd_put_32 (htab->params->stub_bfd, BCTR, loc);
11066 break;
11067
11068 case ppc_stub_plt_call:
11069 case ppc_stub_plt_call_r2save:
11070 if (stub_entry->h != NULL
11071 && stub_entry->h->is_func_descriptor
11072 && stub_entry->h->oh != NULL)
11073 {
11074 struct ppc_link_hash_entry *fh = ppc_follow_link (stub_entry->h->oh);
11075
11076 /* If the old-ABI "dot-symbol" is undefined make it weak so
11077 we don't get a link error from RELOC_FOR_GLOBAL_SYMBOL. */
11078 if (fh->elf.root.type == bfd_link_hash_undefined)
11079 fh->elf.root.type = bfd_link_hash_undefweak;
11080 /* Stop undo_symbol_twiddle changing it back to undefined. */
11081 fh->was_undefined = 0;
11082 }
11083
11084 /* Now build the stub. */
11085 dest = stub_entry->plt_ent->plt.offset & ~1;
11086 if (dest >= (bfd_vma) -2)
11087 abort ();
11088
11089 plt = htab->elf.splt;
11090 if (!htab->elf.dynamic_sections_created
11091 || stub_entry->h == NULL
11092 || stub_entry->h->elf.dynindx == -1)
11093 plt = htab->elf.iplt;
11094
11095 dest += plt->output_offset + plt->output_section->vma;
11096
11097 if (stub_entry->h == NULL
11098 && (stub_entry->plt_ent->plt.offset & 1) == 0)
11099 {
11100 Elf_Internal_Rela rela;
11101 bfd_byte *rl;
11102
11103 rela.r_offset = dest;
11104 if (htab->opd_abi)
11105 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
11106 else
11107 rela.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
11108 rela.r_addend = (stub_entry->target_value
11109 + stub_entry->target_section->output_offset
11110 + stub_entry->target_section->output_section->vma);
11111
11112 rl = (htab->elf.irelplt->contents
11113 + (htab->elf.irelplt->reloc_count++
11114 * sizeof (Elf64_External_Rela)));
11115 bfd_elf64_swap_reloca_out (info->output_bfd, &rela, rl);
11116 stub_entry->plt_ent->plt.offset |= 1;
11117 }
11118
11119 off = (dest
11120 - elf_gp (plt->output_section->owner)
11121 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11122
11123 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
11124 {
11125 info->callbacks->einfo
11126 (_("%P: linkage table error against `%T'\n"),
11127 stub_entry->h != NULL
11128 ? stub_entry->h->elf.root.root.string
11129 : "<local sym>");
11130 bfd_set_error (bfd_error_bad_value);
11131 htab->stub_error = TRUE;
11132 return FALSE;
11133 }
11134
11135 if (htab->params->plt_stub_align != 0)
11136 {
11137 unsigned pad = plt_stub_pad (htab, stub_entry, off);
11138
11139 stub_entry->group->stub_sec->size += pad;
11140 stub_entry->stub_offset = stub_entry->group->stub_sec->size;
11141 loc += pad;
11142 }
11143
11144 r = NULL;
11145 if (info->emitrelocations)
11146 {
11147 r = get_relocs (stub_entry->group->stub_sec,
11148 ((PPC_HA (off) != 0)
11149 + (htab->opd_abi
11150 ? 2 + (htab->params->plt_static_chain
11151 && PPC_HA (off + 16) == PPC_HA (off))
11152 : 1)));
11153 if (r == NULL)
11154 return FALSE;
11155 r[0].r_offset = loc - stub_entry->group->stub_sec->contents;
11156 if (bfd_big_endian (info->output_bfd))
11157 r[0].r_offset += 2;
11158 r[0].r_addend = dest;
11159 }
11160 if (stub_entry->h != NULL
11161 && (stub_entry->h == htab->tls_get_addr_fd
11162 || stub_entry->h == htab->tls_get_addr)
11163 && htab->params->tls_get_addr_opt)
11164 p = build_tls_get_addr_stub (htab, stub_entry, loc, off, r);
11165 else
11166 p = build_plt_stub (htab, stub_entry, loc, off, r);
11167 size = p - loc;
11168 break;
11169
11170 case ppc_stub_save_res:
11171 return TRUE;
11172
11173 default:
11174 BFD_FAIL ();
11175 return FALSE;
11176 }
11177
11178 stub_entry->group->stub_sec->size += size;
11179
11180 if (htab->params->emit_stub_syms)
11181 {
11182 struct elf_link_hash_entry *h;
11183 size_t len1, len2;
11184 char *name;
11185 const char *const stub_str[] = { "long_branch",
11186 "long_branch_r2off",
11187 "plt_branch",
11188 "plt_branch_r2off",
11189 "plt_call",
11190 "plt_call" };
11191
11192 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
11193 len2 = strlen (stub_entry->root.string);
11194 name = bfd_malloc (len1 + len2 + 2);
11195 if (name == NULL)
11196 return FALSE;
11197 memcpy (name, stub_entry->root.string, 9);
11198 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
11199 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
11200 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
11201 if (h == NULL)
11202 return FALSE;
11203 if (h->root.type == bfd_link_hash_new)
11204 {
11205 h->root.type = bfd_link_hash_defined;
11206 h->root.u.def.section = stub_entry->group->stub_sec;
11207 h->root.u.def.value = stub_entry->stub_offset;
11208 h->ref_regular = 1;
11209 h->def_regular = 1;
11210 h->ref_regular_nonweak = 1;
11211 h->forced_local = 1;
11212 h->non_elf = 0;
11213 h->root.linker_def = 1;
11214 }
11215 }
11216
11217 return TRUE;
11218 }
11219
11220 /* As above, but don't actually build the stub. Just bump offset so
11221 we know stub section sizes, and select plt_branch stubs where
11222 long_branch stubs won't do. */
11223
11224 static bfd_boolean
11225 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
11226 {
11227 struct ppc_stub_hash_entry *stub_entry;
11228 struct bfd_link_info *info;
11229 struct ppc_link_hash_table *htab;
11230 bfd_vma off;
11231 int size;
11232
11233 /* Massage our args to the form they really have. */
11234 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
11235 info = in_arg;
11236
11237 htab = ppc_hash_table (info);
11238 if (htab == NULL)
11239 return FALSE;
11240
11241 if (stub_entry->h != NULL
11242 && stub_entry->h->save_res
11243 && stub_entry->h->elf.root.type == bfd_link_hash_defined
11244 && stub_entry->h->elf.root.u.def.section == htab->sfpr)
11245 {
11246 /* Don't make stubs to out-of-line register save/restore
11247 functions. Instead, emit copies of the functions. */
11248 stub_entry->group->needs_save_res = 1;
11249 stub_entry->stub_type = ppc_stub_save_res;
11250 return TRUE;
11251 }
11252
11253 if (stub_entry->stub_type == ppc_stub_plt_call
11254 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
11255 {
11256 asection *plt;
11257 off = stub_entry->plt_ent->plt.offset & ~(bfd_vma) 1;
11258 if (off >= (bfd_vma) -2)
11259 abort ();
11260 plt = htab->elf.splt;
11261 if (!htab->elf.dynamic_sections_created
11262 || stub_entry->h == NULL
11263 || stub_entry->h->elf.dynindx == -1)
11264 plt = htab->elf.iplt;
11265 off += (plt->output_offset
11266 + plt->output_section->vma
11267 - elf_gp (plt->output_section->owner)
11268 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11269
11270 size = plt_stub_size (htab, stub_entry, off);
11271 if (htab->params->plt_stub_align)
11272 size += plt_stub_pad (htab, stub_entry, off);
11273 if (info->emitrelocations)
11274 {
11275 stub_entry->group->stub_sec->reloc_count
11276 += ((PPC_HA (off) != 0)
11277 + (htab->opd_abi
11278 ? 2 + (htab->params->plt_static_chain
11279 && PPC_HA (off + 16) == PPC_HA (off))
11280 : 1));
11281 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11282 }
11283 }
11284 else
11285 {
11286 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
11287 variants. */
11288 bfd_vma r2off = 0;
11289 bfd_vma local_off = 0;
11290
11291 off = (stub_entry->target_value
11292 + stub_entry->target_section->output_offset
11293 + stub_entry->target_section->output_section->vma);
11294 off -= (stub_entry->group->stub_sec->size
11295 + stub_entry->group->stub_sec->output_offset
11296 + stub_entry->group->stub_sec->output_section->vma);
11297
11298 /* Reset the stub type from the plt variant in case we now
11299 can reach with a shorter stub. */
11300 if (stub_entry->stub_type >= ppc_stub_plt_branch)
11301 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
11302
11303 size = 4;
11304 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
11305 {
11306 r2off = get_r2off (info, stub_entry);
11307 if (r2off == (bfd_vma) -1)
11308 {
11309 htab->stub_error = TRUE;
11310 return FALSE;
11311 }
11312 size = 8;
11313 if (PPC_HA (r2off) != 0)
11314 size += 4;
11315 if (PPC_LO (r2off) != 0)
11316 size += 4;
11317 off -= size - 4;
11318 }
11319
11320 local_off = PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
11321
11322 /* If the branch offset if too big, use a ppc_stub_plt_branch.
11323 Do the same for -R objects without function descriptors. */
11324 if (off + (1 << 25) >= (bfd_vma) (1 << 26) - local_off
11325 || (stub_entry->stub_type == ppc_stub_long_branch_r2off
11326 && r2off == 0
11327 && htab->sec_info[stub_entry->target_section->id].toc_off == 0))
11328 {
11329 struct ppc_branch_hash_entry *br_entry;
11330
11331 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
11332 stub_entry->root.string + 9,
11333 TRUE, FALSE);
11334 if (br_entry == NULL)
11335 {
11336 info->callbacks->einfo (_("%P: can't build branch stub `%s'\n"),
11337 stub_entry->root.string);
11338 htab->stub_error = TRUE;
11339 return FALSE;
11340 }
11341
11342 if (br_entry->iter != htab->stub_iteration)
11343 {
11344 br_entry->iter = htab->stub_iteration;
11345 br_entry->offset = htab->brlt->size;
11346 htab->brlt->size += 8;
11347
11348 if (htab->relbrlt != NULL)
11349 htab->relbrlt->size += sizeof (Elf64_External_Rela);
11350 else if (info->emitrelocations)
11351 {
11352 htab->brlt->reloc_count += 1;
11353 htab->brlt->flags |= SEC_RELOC;
11354 }
11355 }
11356
11357 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
11358 off = (br_entry->offset
11359 + htab->brlt->output_offset
11360 + htab->brlt->output_section->vma
11361 - elf_gp (htab->brlt->output_section->owner)
11362 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11363
11364 if (info->emitrelocations)
11365 {
11366 stub_entry->group->stub_sec->reloc_count
11367 += 1 + (PPC_HA (off) != 0);
11368 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11369 }
11370
11371 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
11372 {
11373 size = 12;
11374 if (PPC_HA (off) != 0)
11375 size = 16;
11376 }
11377 else
11378 {
11379 size = 16;
11380 if (PPC_HA (off) != 0)
11381 size += 4;
11382
11383 if (PPC_HA (r2off) != 0)
11384 size += 4;
11385 if (PPC_LO (r2off) != 0)
11386 size += 4;
11387 }
11388 }
11389 else if (info->emitrelocations)
11390 {
11391 stub_entry->group->stub_sec->reloc_count += 1;
11392 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11393 }
11394 }
11395
11396 stub_entry->group->stub_sec->size += size;
11397 return TRUE;
11398 }
11399
11400 /* Set up various things so that we can make a list of input sections
11401 for each output section included in the link. Returns -1 on error,
11402 0 when no stubs will be needed, and 1 on success. */
11403
11404 int
11405 ppc64_elf_setup_section_lists (struct bfd_link_info *info)
11406 {
11407 unsigned int id;
11408 bfd_size_type amt;
11409 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11410
11411 if (htab == NULL)
11412 return -1;
11413
11414 htab->sec_info_arr_size = bfd_get_next_section_id ();
11415 amt = sizeof (*htab->sec_info) * (htab->sec_info_arr_size);
11416 htab->sec_info = bfd_zmalloc (amt);
11417 if (htab->sec_info == NULL)
11418 return -1;
11419
11420 /* Set toc_off for com, und, abs and ind sections. */
11421 for (id = 0; id < 3; id++)
11422 htab->sec_info[id].toc_off = TOC_BASE_OFF;
11423
11424 return 1;
11425 }
11426
11427 /* Set up for first pass at multitoc partitioning. */
11428
11429 void
11430 ppc64_elf_start_multitoc_partition (struct bfd_link_info *info)
11431 {
11432 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11433
11434 htab->toc_curr = ppc64_elf_set_toc (info, info->output_bfd);
11435 htab->toc_bfd = NULL;
11436 htab->toc_first_sec = NULL;
11437 }
11438
11439 /* The linker repeatedly calls this function for each TOC input section
11440 and linker generated GOT section. Group input bfds such that the toc
11441 within a group is less than 64k in size. */
11442
11443 bfd_boolean
11444 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
11445 {
11446 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11447 bfd_vma addr, off, limit;
11448
11449 if (htab == NULL)
11450 return FALSE;
11451
11452 if (!htab->second_toc_pass)
11453 {
11454 /* Keep track of the first .toc or .got section for this input bfd. */
11455 bfd_boolean new_bfd = htab->toc_bfd != isec->owner;
11456
11457 if (new_bfd)
11458 {
11459 htab->toc_bfd = isec->owner;
11460 htab->toc_first_sec = isec;
11461 }
11462
11463 addr = isec->output_offset + isec->output_section->vma;
11464 off = addr - htab->toc_curr;
11465 limit = 0x80008000;
11466 if (ppc64_elf_tdata (isec->owner)->has_small_toc_reloc)
11467 limit = 0x10000;
11468 if (off + isec->size > limit)
11469 {
11470 addr = (htab->toc_first_sec->output_offset
11471 + htab->toc_first_sec->output_section->vma);
11472 htab->toc_curr = addr;
11473 htab->toc_curr &= -TOC_BASE_ALIGN;
11474 }
11475
11476 /* toc_curr is the base address of this toc group. Set elf_gp
11477 for the input section to be the offset relative to the
11478 output toc base plus 0x8000. Making the input elf_gp an
11479 offset allows us to move the toc as a whole without
11480 recalculating input elf_gp. */
11481 off = htab->toc_curr - elf_gp (isec->output_section->owner);
11482 off += TOC_BASE_OFF;
11483
11484 /* Die if someone uses a linker script that doesn't keep input
11485 file .toc and .got together. */
11486 if (new_bfd
11487 && elf_gp (isec->owner) != 0
11488 && elf_gp (isec->owner) != off)
11489 return FALSE;
11490
11491 elf_gp (isec->owner) = off;
11492 return TRUE;
11493 }
11494
11495 /* During the second pass toc_first_sec points to the start of
11496 a toc group, and toc_curr is used to track the old elf_gp.
11497 We use toc_bfd to ensure we only look at each bfd once. */
11498 if (htab->toc_bfd == isec->owner)
11499 return TRUE;
11500 htab->toc_bfd = isec->owner;
11501
11502 if (htab->toc_first_sec == NULL
11503 || htab->toc_curr != elf_gp (isec->owner))
11504 {
11505 htab->toc_curr = elf_gp (isec->owner);
11506 htab->toc_first_sec = isec;
11507 }
11508 addr = (htab->toc_first_sec->output_offset
11509 + htab->toc_first_sec->output_section->vma);
11510 off = addr - elf_gp (isec->output_section->owner) + TOC_BASE_OFF;
11511 elf_gp (isec->owner) = off;
11512
11513 return TRUE;
11514 }
11515
11516 /* Called via elf_link_hash_traverse to merge GOT entries for global
11517 symbol H. */
11518
11519 static bfd_boolean
11520 merge_global_got (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
11521 {
11522 if (h->root.type == bfd_link_hash_indirect)
11523 return TRUE;
11524
11525 merge_got_entries (&h->got.glist);
11526
11527 return TRUE;
11528 }
11529
11530 /* Called via elf_link_hash_traverse to allocate GOT entries for global
11531 symbol H. */
11532
11533 static bfd_boolean
11534 reallocate_got (struct elf_link_hash_entry *h, void *inf)
11535 {
11536 struct got_entry *gent;
11537
11538 if (h->root.type == bfd_link_hash_indirect)
11539 return TRUE;
11540
11541 for (gent = h->got.glist; gent != NULL; gent = gent->next)
11542 if (!gent->is_indirect)
11543 allocate_got (h, (struct bfd_link_info *) inf, gent);
11544 return TRUE;
11545 }
11546
11547 /* Called on the first multitoc pass after the last call to
11548 ppc64_elf_next_toc_section. This function removes duplicate GOT
11549 entries. */
11550
11551 bfd_boolean
11552 ppc64_elf_layout_multitoc (struct bfd_link_info *info)
11553 {
11554 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11555 struct bfd *ibfd, *ibfd2;
11556 bfd_boolean done_something;
11557
11558 htab->multi_toc_needed = htab->toc_curr != elf_gp (info->output_bfd);
11559
11560 if (!htab->do_multi_toc)
11561 return FALSE;
11562
11563 /* Merge global sym got entries within a toc group. */
11564 elf_link_hash_traverse (&htab->elf, merge_global_got, info);
11565
11566 /* And tlsld_got. */
11567 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11568 {
11569 struct got_entry *ent, *ent2;
11570
11571 if (!is_ppc64_elf (ibfd))
11572 continue;
11573
11574 ent = ppc64_tlsld_got (ibfd);
11575 if (!ent->is_indirect
11576 && ent->got.offset != (bfd_vma) -1)
11577 {
11578 for (ibfd2 = ibfd->link.next; ibfd2 != NULL; ibfd2 = ibfd2->link.next)
11579 {
11580 if (!is_ppc64_elf (ibfd2))
11581 continue;
11582
11583 ent2 = ppc64_tlsld_got (ibfd2);
11584 if (!ent2->is_indirect
11585 && ent2->got.offset != (bfd_vma) -1
11586 && elf_gp (ibfd2) == elf_gp (ibfd))
11587 {
11588 ent2->is_indirect = TRUE;
11589 ent2->got.ent = ent;
11590 }
11591 }
11592 }
11593 }
11594
11595 /* Zap sizes of got sections. */
11596 htab->elf.irelplt->rawsize = htab->elf.irelplt->size;
11597 htab->elf.irelplt->size -= htab->got_reli_size;
11598 htab->got_reli_size = 0;
11599
11600 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11601 {
11602 asection *got, *relgot;
11603
11604 if (!is_ppc64_elf (ibfd))
11605 continue;
11606
11607 got = ppc64_elf_tdata (ibfd)->got;
11608 if (got != NULL)
11609 {
11610 got->rawsize = got->size;
11611 got->size = 0;
11612 relgot = ppc64_elf_tdata (ibfd)->relgot;
11613 relgot->rawsize = relgot->size;
11614 relgot->size = 0;
11615 }
11616 }
11617
11618 /* Now reallocate the got, local syms first. We don't need to
11619 allocate section contents again since we never increase size. */
11620 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11621 {
11622 struct got_entry **lgot_ents;
11623 struct got_entry **end_lgot_ents;
11624 struct plt_entry **local_plt;
11625 struct plt_entry **end_local_plt;
11626 unsigned char *lgot_masks;
11627 bfd_size_type locsymcount;
11628 Elf_Internal_Shdr *symtab_hdr;
11629 asection *s;
11630
11631 if (!is_ppc64_elf (ibfd))
11632 continue;
11633
11634 lgot_ents = elf_local_got_ents (ibfd);
11635 if (!lgot_ents)
11636 continue;
11637
11638 symtab_hdr = &elf_symtab_hdr (ibfd);
11639 locsymcount = symtab_hdr->sh_info;
11640 end_lgot_ents = lgot_ents + locsymcount;
11641 local_plt = (struct plt_entry **) end_lgot_ents;
11642 end_local_plt = local_plt + locsymcount;
11643 lgot_masks = (unsigned char *) end_local_plt;
11644 s = ppc64_elf_tdata (ibfd)->got;
11645 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
11646 {
11647 struct got_entry *ent;
11648
11649 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
11650 {
11651 unsigned int ent_size = 8;
11652 unsigned int rel_size = sizeof (Elf64_External_Rela);
11653
11654 ent->got.offset = s->size;
11655 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
11656 {
11657 ent_size *= 2;
11658 rel_size *= 2;
11659 }
11660 s->size += ent_size;
11661 if ((*lgot_masks & PLT_IFUNC) != 0)
11662 {
11663 htab->elf.irelplt->size += rel_size;
11664 htab->got_reli_size += rel_size;
11665 }
11666 else if (bfd_link_pic (info))
11667 {
11668 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
11669 srel->size += rel_size;
11670 }
11671 }
11672 }
11673 }
11674
11675 elf_link_hash_traverse (&htab->elf, reallocate_got, info);
11676
11677 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11678 {
11679 struct got_entry *ent;
11680
11681 if (!is_ppc64_elf (ibfd))
11682 continue;
11683
11684 ent = ppc64_tlsld_got (ibfd);
11685 if (!ent->is_indirect
11686 && ent->got.offset != (bfd_vma) -1)
11687 {
11688 asection *s = ppc64_elf_tdata (ibfd)->got;
11689 ent->got.offset = s->size;
11690 s->size += 16;
11691 if (bfd_link_pic (info))
11692 {
11693 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
11694 srel->size += sizeof (Elf64_External_Rela);
11695 }
11696 }
11697 }
11698
11699 done_something = htab->elf.irelplt->rawsize != htab->elf.irelplt->size;
11700 if (!done_something)
11701 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11702 {
11703 asection *got;
11704
11705 if (!is_ppc64_elf (ibfd))
11706 continue;
11707
11708 got = ppc64_elf_tdata (ibfd)->got;
11709 if (got != NULL)
11710 {
11711 done_something = got->rawsize != got->size;
11712 if (done_something)
11713 break;
11714 }
11715 }
11716
11717 if (done_something)
11718 (*htab->params->layout_sections_again) ();
11719
11720 /* Set up for second pass over toc sections to recalculate elf_gp
11721 on input sections. */
11722 htab->toc_bfd = NULL;
11723 htab->toc_first_sec = NULL;
11724 htab->second_toc_pass = TRUE;
11725 return done_something;
11726 }
11727
11728 /* Called after second pass of multitoc partitioning. */
11729
11730 void
11731 ppc64_elf_finish_multitoc_partition (struct bfd_link_info *info)
11732 {
11733 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11734
11735 /* After the second pass, toc_curr tracks the TOC offset used
11736 for code sections below in ppc64_elf_next_input_section. */
11737 htab->toc_curr = TOC_BASE_OFF;
11738 }
11739
11740 /* No toc references were found in ISEC. If the code in ISEC makes no
11741 calls, then there's no need to use toc adjusting stubs when branching
11742 into ISEC. Actually, indirect calls from ISEC are OK as they will
11743 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
11744 needed, and 2 if a cyclical call-graph was found but no other reason
11745 for a stub was detected. If called from the top level, a return of
11746 2 means the same as a return of 0. */
11747
11748 static int
11749 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
11750 {
11751 int ret;
11752
11753 /* Mark this section as checked. */
11754 isec->call_check_done = 1;
11755
11756 /* We know none of our code bearing sections will need toc stubs. */
11757 if ((isec->flags & SEC_LINKER_CREATED) != 0)
11758 return 0;
11759
11760 if (isec->size == 0)
11761 return 0;
11762
11763 if (isec->output_section == NULL)
11764 return 0;
11765
11766 ret = 0;
11767 if (isec->reloc_count != 0)
11768 {
11769 Elf_Internal_Rela *relstart, *rel;
11770 Elf_Internal_Sym *local_syms;
11771 struct ppc_link_hash_table *htab;
11772
11773 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
11774 info->keep_memory);
11775 if (relstart == NULL)
11776 return -1;
11777
11778 /* Look for branches to outside of this section. */
11779 local_syms = NULL;
11780 htab = ppc_hash_table (info);
11781 if (htab == NULL)
11782 return -1;
11783
11784 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
11785 {
11786 enum elf_ppc64_reloc_type r_type;
11787 unsigned long r_symndx;
11788 struct elf_link_hash_entry *h;
11789 struct ppc_link_hash_entry *eh;
11790 Elf_Internal_Sym *sym;
11791 asection *sym_sec;
11792 struct _opd_sec_data *opd;
11793 bfd_vma sym_value;
11794 bfd_vma dest;
11795
11796 r_type = ELF64_R_TYPE (rel->r_info);
11797 if (r_type != R_PPC64_REL24
11798 && r_type != R_PPC64_REL14
11799 && r_type != R_PPC64_REL14_BRTAKEN
11800 && r_type != R_PPC64_REL14_BRNTAKEN)
11801 continue;
11802
11803 r_symndx = ELF64_R_SYM (rel->r_info);
11804 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
11805 isec->owner))
11806 {
11807 ret = -1;
11808 break;
11809 }
11810
11811 /* Calls to dynamic lib functions go through a plt call stub
11812 that uses r2. */
11813 eh = (struct ppc_link_hash_entry *) h;
11814 if (eh != NULL
11815 && (eh->elf.plt.plist != NULL
11816 || (eh->oh != NULL
11817 && ppc_follow_link (eh->oh)->elf.plt.plist != NULL)))
11818 {
11819 ret = 1;
11820 break;
11821 }
11822
11823 if (sym_sec == NULL)
11824 /* Ignore other undefined symbols. */
11825 continue;
11826
11827 /* Assume branches to other sections not included in the
11828 link need stubs too, to cover -R and absolute syms. */
11829 if (sym_sec->output_section == NULL)
11830 {
11831 ret = 1;
11832 break;
11833 }
11834
11835 if (h == NULL)
11836 sym_value = sym->st_value;
11837 else
11838 {
11839 if (h->root.type != bfd_link_hash_defined
11840 && h->root.type != bfd_link_hash_defweak)
11841 abort ();
11842 sym_value = h->root.u.def.value;
11843 }
11844 sym_value += rel->r_addend;
11845
11846 /* If this branch reloc uses an opd sym, find the code section. */
11847 opd = get_opd_info (sym_sec);
11848 if (opd != NULL)
11849 {
11850 if (h == NULL && opd->adjust != NULL)
11851 {
11852 long adjust;
11853
11854 adjust = opd->adjust[OPD_NDX (sym_value)];
11855 if (adjust == -1)
11856 /* Assume deleted functions won't ever be called. */
11857 continue;
11858 sym_value += adjust;
11859 }
11860
11861 dest = opd_entry_value (sym_sec, sym_value,
11862 &sym_sec, NULL, FALSE);
11863 if (dest == (bfd_vma) -1)
11864 continue;
11865 }
11866 else
11867 dest = (sym_value
11868 + sym_sec->output_offset
11869 + sym_sec->output_section->vma);
11870
11871 /* Ignore branch to self. */
11872 if (sym_sec == isec)
11873 continue;
11874
11875 /* If the called function uses the toc, we need a stub. */
11876 if (sym_sec->has_toc_reloc
11877 || sym_sec->makes_toc_func_call)
11878 {
11879 ret = 1;
11880 break;
11881 }
11882
11883 /* Assume any branch that needs a long branch stub might in fact
11884 need a plt_branch stub. A plt_branch stub uses r2. */
11885 else if (dest - (isec->output_offset
11886 + isec->output_section->vma
11887 + rel->r_offset) + (1 << 25)
11888 >= (2u << 25) - PPC64_LOCAL_ENTRY_OFFSET (h
11889 ? h->other
11890 : sym->st_other))
11891 {
11892 ret = 1;
11893 break;
11894 }
11895
11896 /* If calling back to a section in the process of being
11897 tested, we can't say for sure that no toc adjusting stubs
11898 are needed, so don't return zero. */
11899 else if (sym_sec->call_check_in_progress)
11900 ret = 2;
11901
11902 /* Branches to another section that itself doesn't have any TOC
11903 references are OK. Recursively call ourselves to check. */
11904 else if (!sym_sec->call_check_done)
11905 {
11906 int recur;
11907
11908 /* Mark current section as indeterminate, so that other
11909 sections that call back to current won't be marked as
11910 known. */
11911 isec->call_check_in_progress = 1;
11912 recur = toc_adjusting_stub_needed (info, sym_sec);
11913 isec->call_check_in_progress = 0;
11914
11915 if (recur != 0)
11916 {
11917 ret = recur;
11918 if (recur != 2)
11919 break;
11920 }
11921 }
11922 }
11923
11924 if (local_syms != NULL
11925 && (elf_symtab_hdr (isec->owner).contents
11926 != (unsigned char *) local_syms))
11927 free (local_syms);
11928 if (elf_section_data (isec)->relocs != relstart)
11929 free (relstart);
11930 }
11931
11932 if ((ret & 1) == 0
11933 && isec->map_head.s != NULL
11934 && (strcmp (isec->output_section->name, ".init") == 0
11935 || strcmp (isec->output_section->name, ".fini") == 0))
11936 {
11937 if (isec->map_head.s->has_toc_reloc
11938 || isec->map_head.s->makes_toc_func_call)
11939 ret = 1;
11940 else if (!isec->map_head.s->call_check_done)
11941 {
11942 int recur;
11943 isec->call_check_in_progress = 1;
11944 recur = toc_adjusting_stub_needed (info, isec->map_head.s);
11945 isec->call_check_in_progress = 0;
11946 if (recur != 0)
11947 ret = recur;
11948 }
11949 }
11950
11951 if (ret == 1)
11952 isec->makes_toc_func_call = 1;
11953
11954 return ret;
11955 }
11956
11957 /* The linker repeatedly calls this function for each input section,
11958 in the order that input sections are linked into output sections.
11959 Build lists of input sections to determine groupings between which
11960 we may insert linker stubs. */
11961
11962 bfd_boolean
11963 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
11964 {
11965 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11966
11967 if (htab == NULL)
11968 return FALSE;
11969
11970 if ((isec->output_section->flags & SEC_CODE) != 0
11971 && isec->output_section->id < htab->sec_info_arr_size)
11972 {
11973 /* This happens to make the list in reverse order,
11974 which is what we want. */
11975 htab->sec_info[isec->id].u.list
11976 = htab->sec_info[isec->output_section->id].u.list;
11977 htab->sec_info[isec->output_section->id].u.list = isec;
11978 }
11979
11980 if (htab->multi_toc_needed)
11981 {
11982 /* Analyse sections that aren't already flagged as needing a
11983 valid toc pointer. Exclude .fixup for the linux kernel.
11984 .fixup contains branches, but only back to the function that
11985 hit an exception. */
11986 if (!(isec->has_toc_reloc
11987 || (isec->flags & SEC_CODE) == 0
11988 || strcmp (isec->name, ".fixup") == 0
11989 || isec->call_check_done))
11990 {
11991 if (toc_adjusting_stub_needed (info, isec) < 0)
11992 return FALSE;
11993 }
11994 /* Make all sections use the TOC assigned for this object file.
11995 This will be wrong for pasted sections; We fix that in
11996 check_pasted_section(). */
11997 if (elf_gp (isec->owner) != 0)
11998 htab->toc_curr = elf_gp (isec->owner);
11999 }
12000
12001 htab->sec_info[isec->id].toc_off = htab->toc_curr;
12002 return TRUE;
12003 }
12004
12005 /* Check that all .init and .fini sections use the same toc, if they
12006 have toc relocs. */
12007
12008 static bfd_boolean
12009 check_pasted_section (struct bfd_link_info *info, const char *name)
12010 {
12011 asection *o = bfd_get_section_by_name (info->output_bfd, name);
12012
12013 if (o != NULL)
12014 {
12015 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12016 bfd_vma toc_off = 0;
12017 asection *i;
12018
12019 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
12020 if (i->has_toc_reloc)
12021 {
12022 if (toc_off == 0)
12023 toc_off = htab->sec_info[i->id].toc_off;
12024 else if (toc_off != htab->sec_info[i->id].toc_off)
12025 return FALSE;
12026 }
12027
12028 if (toc_off == 0)
12029 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
12030 if (i->makes_toc_func_call)
12031 {
12032 toc_off = htab->sec_info[i->id].toc_off;
12033 break;
12034 }
12035
12036 /* Make sure the whole pasted function uses the same toc offset. */
12037 if (toc_off != 0)
12038 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
12039 htab->sec_info[i->id].toc_off = toc_off;
12040 }
12041 return TRUE;
12042 }
12043
12044 bfd_boolean
12045 ppc64_elf_check_init_fini (struct bfd_link_info *info)
12046 {
12047 return (check_pasted_section (info, ".init")
12048 & check_pasted_section (info, ".fini"));
12049 }
12050
12051 /* See whether we can group stub sections together. Grouping stub
12052 sections may result in fewer stubs. More importantly, we need to
12053 put all .init* and .fini* stubs at the beginning of the .init or
12054 .fini output sections respectively, because glibc splits the
12055 _init and _fini functions into multiple parts. Putting a stub in
12056 the middle of a function is not a good idea. */
12057
12058 static bfd_boolean
12059 group_sections (struct bfd_link_info *info,
12060 bfd_size_type stub_group_size,
12061 bfd_boolean stubs_always_before_branch)
12062 {
12063 struct ppc_link_hash_table *htab;
12064 asection *osec;
12065 bfd_boolean suppress_size_errors;
12066
12067 htab = ppc_hash_table (info);
12068 if (htab == NULL)
12069 return FALSE;
12070
12071 suppress_size_errors = FALSE;
12072 if (stub_group_size == 1)
12073 {
12074 /* Default values. */
12075 if (stubs_always_before_branch)
12076 stub_group_size = 0x1e00000;
12077 else
12078 stub_group_size = 0x1c00000;
12079 suppress_size_errors = TRUE;
12080 }
12081
12082 for (osec = info->output_bfd->sections; osec != NULL; osec = osec->next)
12083 {
12084 asection *tail;
12085
12086 if (osec->id >= htab->sec_info_arr_size)
12087 continue;
12088
12089 tail = htab->sec_info[osec->id].u.list;
12090 while (tail != NULL)
12091 {
12092 asection *curr;
12093 asection *prev;
12094 bfd_size_type total;
12095 bfd_boolean big_sec;
12096 bfd_vma curr_toc;
12097 struct map_stub *group;
12098 bfd_size_type group_size;
12099
12100 curr = tail;
12101 total = tail->size;
12102 group_size = (ppc64_elf_section_data (tail) != NULL
12103 && ppc64_elf_section_data (tail)->has_14bit_branch
12104 ? stub_group_size >> 10 : stub_group_size);
12105
12106 big_sec = total > group_size;
12107 if (big_sec && !suppress_size_errors)
12108 _bfd_error_handler (_("%B section %A exceeds stub group size"),
12109 tail->owner, tail);
12110 curr_toc = htab->sec_info[tail->id].toc_off;
12111
12112 while ((prev = htab->sec_info[curr->id].u.list) != NULL
12113 && ((total += curr->output_offset - prev->output_offset)
12114 < (ppc64_elf_section_data (prev) != NULL
12115 && ppc64_elf_section_data (prev)->has_14bit_branch
12116 ? (group_size = stub_group_size >> 10) : group_size))
12117 && htab->sec_info[prev->id].toc_off == curr_toc)
12118 curr = prev;
12119
12120 /* OK, the size from the start of CURR to the end is less
12121 than group_size and thus can be handled by one stub
12122 section. (or the tail section is itself larger than
12123 group_size, in which case we may be toast.) We should
12124 really be keeping track of the total size of stubs added
12125 here, as stubs contribute to the final output section
12126 size. That's a little tricky, and this way will only
12127 break if stubs added make the total size more than 2^25,
12128 ie. for the default stub_group_size, if stubs total more
12129 than 2097152 bytes, or nearly 75000 plt call stubs. */
12130 group = bfd_alloc (curr->owner, sizeof (*group));
12131 if (group == NULL)
12132 return FALSE;
12133 group->link_sec = curr;
12134 group->stub_sec = NULL;
12135 group->needs_save_res = 0;
12136 group->next = htab->group;
12137 htab->group = group;
12138 do
12139 {
12140 prev = htab->sec_info[tail->id].u.list;
12141 /* Set up this stub group. */
12142 htab->sec_info[tail->id].u.group = group;
12143 }
12144 while (tail != curr && (tail = prev) != NULL);
12145
12146 /* But wait, there's more! Input sections up to group_size
12147 bytes before the stub section can be handled by it too.
12148 Don't do this if we have a really large section after the
12149 stubs, as adding more stubs increases the chance that
12150 branches may not reach into the stub section. */
12151 if (!stubs_always_before_branch && !big_sec)
12152 {
12153 total = 0;
12154 while (prev != NULL
12155 && ((total += tail->output_offset - prev->output_offset)
12156 < (ppc64_elf_section_data (prev) != NULL
12157 && ppc64_elf_section_data (prev)->has_14bit_branch
12158 ? (group_size = stub_group_size >> 10) : group_size))
12159 && htab->sec_info[prev->id].toc_off == curr_toc)
12160 {
12161 tail = prev;
12162 prev = htab->sec_info[tail->id].u.list;
12163 htab->sec_info[tail->id].u.group = group;
12164 }
12165 }
12166 tail = prev;
12167 }
12168 }
12169 return TRUE;
12170 }
12171
12172 static const unsigned char glink_eh_frame_cie[] =
12173 {
12174 0, 0, 0, 16, /* length. */
12175 0, 0, 0, 0, /* id. */
12176 1, /* CIE version. */
12177 'z', 'R', 0, /* Augmentation string. */
12178 4, /* Code alignment. */
12179 0x78, /* Data alignment. */
12180 65, /* RA reg. */
12181 1, /* Augmentation size. */
12182 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
12183 DW_CFA_def_cfa, 1, 0, /* def_cfa: r1 offset 0. */
12184 0, 0, 0, 0
12185 };
12186
12187 /* Stripping output sections is normally done before dynamic section
12188 symbols have been allocated. This function is called later, and
12189 handles cases like htab->brlt which is mapped to its own output
12190 section. */
12191
12192 static void
12193 maybe_strip_output (struct bfd_link_info *info, asection *isec)
12194 {
12195 if (isec->size == 0
12196 && isec->output_section->size == 0
12197 && !(isec->output_section->flags & SEC_KEEP)
12198 && !bfd_section_removed_from_list (info->output_bfd,
12199 isec->output_section)
12200 && elf_section_data (isec->output_section)->dynindx == 0)
12201 {
12202 isec->output_section->flags |= SEC_EXCLUDE;
12203 bfd_section_list_remove (info->output_bfd, isec->output_section);
12204 info->output_bfd->section_count--;
12205 }
12206 }
12207
12208 /* Determine and set the size of the stub section for a final link.
12209
12210 The basic idea here is to examine all the relocations looking for
12211 PC-relative calls to a target that is unreachable with a "bl"
12212 instruction. */
12213
12214 bfd_boolean
12215 ppc64_elf_size_stubs (struct bfd_link_info *info)
12216 {
12217 bfd_size_type stub_group_size;
12218 bfd_boolean stubs_always_before_branch;
12219 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12220
12221 if (htab == NULL)
12222 return FALSE;
12223
12224 if (htab->params->plt_thread_safe == -1 && !bfd_link_executable (info))
12225 htab->params->plt_thread_safe = 1;
12226 if (!htab->opd_abi)
12227 htab->params->plt_thread_safe = 0;
12228 else if (htab->params->plt_thread_safe == -1)
12229 {
12230 static const char *const thread_starter[] =
12231 {
12232 "pthread_create",
12233 /* libstdc++ */
12234 "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE",
12235 /* librt */
12236 "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio",
12237 "mq_notify", "create_timer",
12238 /* libanl */
12239 "getaddrinfo_a",
12240 /* libgomp */
12241 "GOMP_parallel",
12242 "GOMP_parallel_start",
12243 "GOMP_parallel_loop_static",
12244 "GOMP_parallel_loop_static_start",
12245 "GOMP_parallel_loop_dynamic",
12246 "GOMP_parallel_loop_dynamic_start",
12247 "GOMP_parallel_loop_guided",
12248 "GOMP_parallel_loop_guided_start",
12249 "GOMP_parallel_loop_runtime",
12250 "GOMP_parallel_loop_runtime_start",
12251 "GOMP_parallel_sections",
12252 "GOMP_parallel_sections_start",
12253 /* libgo */
12254 "__go_go",
12255 };
12256 unsigned i;
12257
12258 for (i = 0; i < ARRAY_SIZE (thread_starter); i++)
12259 {
12260 struct elf_link_hash_entry *h;
12261 h = elf_link_hash_lookup (&htab->elf, thread_starter[i],
12262 FALSE, FALSE, TRUE);
12263 htab->params->plt_thread_safe = h != NULL && h->ref_regular;
12264 if (htab->params->plt_thread_safe)
12265 break;
12266 }
12267 }
12268 stubs_always_before_branch = htab->params->group_size < 0;
12269 if (htab->params->group_size < 0)
12270 stub_group_size = -htab->params->group_size;
12271 else
12272 stub_group_size = htab->params->group_size;
12273
12274 if (!group_sections (info, stub_group_size, stubs_always_before_branch))
12275 return FALSE;
12276
12277 #define STUB_SHRINK_ITER 20
12278 /* Loop until no stubs added. After iteration 20 of this loop we may
12279 exit on a stub section shrinking. This is to break out of a
12280 pathological case where adding stubs on one iteration decreases
12281 section gaps (perhaps due to alignment), which then requires
12282 fewer or smaller stubs on the next iteration. */
12283
12284 while (1)
12285 {
12286 bfd *input_bfd;
12287 unsigned int bfd_indx;
12288 struct map_stub *group;
12289 asection *stub_sec;
12290
12291 htab->stub_iteration += 1;
12292
12293 for (input_bfd = info->input_bfds, bfd_indx = 0;
12294 input_bfd != NULL;
12295 input_bfd = input_bfd->link.next, bfd_indx++)
12296 {
12297 Elf_Internal_Shdr *symtab_hdr;
12298 asection *section;
12299 Elf_Internal_Sym *local_syms = NULL;
12300
12301 if (!is_ppc64_elf (input_bfd))
12302 continue;
12303
12304 /* We'll need the symbol table in a second. */
12305 symtab_hdr = &elf_symtab_hdr (input_bfd);
12306 if (symtab_hdr->sh_info == 0)
12307 continue;
12308
12309 /* Walk over each section attached to the input bfd. */
12310 for (section = input_bfd->sections;
12311 section != NULL;
12312 section = section->next)
12313 {
12314 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
12315
12316 /* If there aren't any relocs, then there's nothing more
12317 to do. */
12318 if ((section->flags & SEC_RELOC) == 0
12319 || (section->flags & SEC_ALLOC) == 0
12320 || (section->flags & SEC_LOAD) == 0
12321 || (section->flags & SEC_CODE) == 0
12322 || section->reloc_count == 0)
12323 continue;
12324
12325 /* If this section is a link-once section that will be
12326 discarded, then don't create any stubs. */
12327 if (section->output_section == NULL
12328 || section->output_section->owner != info->output_bfd)
12329 continue;
12330
12331 /* Get the relocs. */
12332 internal_relocs
12333 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
12334 info->keep_memory);
12335 if (internal_relocs == NULL)
12336 goto error_ret_free_local;
12337
12338 /* Now examine each relocation. */
12339 irela = internal_relocs;
12340 irelaend = irela + section->reloc_count;
12341 for (; irela < irelaend; irela++)
12342 {
12343 enum elf_ppc64_reloc_type r_type;
12344 unsigned int r_indx;
12345 enum ppc_stub_type stub_type;
12346 struct ppc_stub_hash_entry *stub_entry;
12347 asection *sym_sec, *code_sec;
12348 bfd_vma sym_value, code_value;
12349 bfd_vma destination;
12350 unsigned long local_off;
12351 bfd_boolean ok_dest;
12352 struct ppc_link_hash_entry *hash;
12353 struct ppc_link_hash_entry *fdh;
12354 struct elf_link_hash_entry *h;
12355 Elf_Internal_Sym *sym;
12356 char *stub_name;
12357 const asection *id_sec;
12358 struct _opd_sec_data *opd;
12359 struct plt_entry *plt_ent;
12360
12361 r_type = ELF64_R_TYPE (irela->r_info);
12362 r_indx = ELF64_R_SYM (irela->r_info);
12363
12364 if (r_type >= R_PPC64_max)
12365 {
12366 bfd_set_error (bfd_error_bad_value);
12367 goto error_ret_free_internal;
12368 }
12369
12370 /* Only look for stubs on branch instructions. */
12371 if (r_type != R_PPC64_REL24
12372 && r_type != R_PPC64_REL14
12373 && r_type != R_PPC64_REL14_BRTAKEN
12374 && r_type != R_PPC64_REL14_BRNTAKEN)
12375 continue;
12376
12377 /* Now determine the call target, its name, value,
12378 section. */
12379 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
12380 r_indx, input_bfd))
12381 goto error_ret_free_internal;
12382 hash = (struct ppc_link_hash_entry *) h;
12383
12384 ok_dest = FALSE;
12385 fdh = NULL;
12386 sym_value = 0;
12387 if (hash == NULL)
12388 {
12389 sym_value = sym->st_value;
12390 if (sym_sec != NULL
12391 && sym_sec->output_section != NULL)
12392 ok_dest = TRUE;
12393 }
12394 else if (hash->elf.root.type == bfd_link_hash_defined
12395 || hash->elf.root.type == bfd_link_hash_defweak)
12396 {
12397 sym_value = hash->elf.root.u.def.value;
12398 if (sym_sec->output_section != NULL)
12399 ok_dest = TRUE;
12400 }
12401 else if (hash->elf.root.type == bfd_link_hash_undefweak
12402 || hash->elf.root.type == bfd_link_hash_undefined)
12403 {
12404 /* Recognise an old ABI func code entry sym, and
12405 use the func descriptor sym instead if it is
12406 defined. */
12407 if (hash->elf.root.root.string[0] == '.'
12408 && (fdh = lookup_fdh (hash, htab)) != NULL)
12409 {
12410 if (fdh->elf.root.type == bfd_link_hash_defined
12411 || fdh->elf.root.type == bfd_link_hash_defweak)
12412 {
12413 sym_sec = fdh->elf.root.u.def.section;
12414 sym_value = fdh->elf.root.u.def.value;
12415 if (sym_sec->output_section != NULL)
12416 ok_dest = TRUE;
12417 }
12418 else
12419 fdh = NULL;
12420 }
12421 }
12422 else
12423 {
12424 bfd_set_error (bfd_error_bad_value);
12425 goto error_ret_free_internal;
12426 }
12427
12428 destination = 0;
12429 local_off = 0;
12430 if (ok_dest)
12431 {
12432 sym_value += irela->r_addend;
12433 destination = (sym_value
12434 + sym_sec->output_offset
12435 + sym_sec->output_section->vma);
12436 local_off = PPC64_LOCAL_ENTRY_OFFSET (hash
12437 ? hash->elf.other
12438 : sym->st_other);
12439 }
12440
12441 code_sec = sym_sec;
12442 code_value = sym_value;
12443 opd = get_opd_info (sym_sec);
12444 if (opd != NULL)
12445 {
12446 bfd_vma dest;
12447
12448 if (hash == NULL && opd->adjust != NULL)
12449 {
12450 long adjust = opd->adjust[OPD_NDX (sym_value)];
12451 if (adjust == -1)
12452 continue;
12453 code_value += adjust;
12454 sym_value += adjust;
12455 }
12456 dest = opd_entry_value (sym_sec, sym_value,
12457 &code_sec, &code_value, FALSE);
12458 if (dest != (bfd_vma) -1)
12459 {
12460 destination = dest;
12461 if (fdh != NULL)
12462 {
12463 /* Fixup old ABI sym to point at code
12464 entry. */
12465 hash->elf.root.type = bfd_link_hash_defweak;
12466 hash->elf.root.u.def.section = code_sec;
12467 hash->elf.root.u.def.value = code_value;
12468 }
12469 }
12470 }
12471
12472 /* Determine what (if any) linker stub is needed. */
12473 plt_ent = NULL;
12474 stub_type = ppc_type_of_stub (section, irela, &hash,
12475 &plt_ent, destination,
12476 local_off);
12477
12478 if (stub_type != ppc_stub_plt_call)
12479 {
12480 /* Check whether we need a TOC adjusting stub.
12481 Since the linker pastes together pieces from
12482 different object files when creating the
12483 _init and _fini functions, it may be that a
12484 call to what looks like a local sym is in
12485 fact a call needing a TOC adjustment. */
12486 if (code_sec != NULL
12487 && code_sec->output_section != NULL
12488 && (htab->sec_info[code_sec->id].toc_off
12489 != htab->sec_info[section->id].toc_off)
12490 && (code_sec->has_toc_reloc
12491 || code_sec->makes_toc_func_call))
12492 stub_type = ppc_stub_long_branch_r2off;
12493 }
12494
12495 if (stub_type == ppc_stub_none)
12496 continue;
12497
12498 /* __tls_get_addr calls might be eliminated. */
12499 if (stub_type != ppc_stub_plt_call
12500 && hash != NULL
12501 && (hash == htab->tls_get_addr
12502 || hash == htab->tls_get_addr_fd)
12503 && section->has_tls_reloc
12504 && irela != internal_relocs)
12505 {
12506 /* Get tls info. */
12507 unsigned char *tls_mask;
12508
12509 if (!get_tls_mask (&tls_mask, NULL, NULL, &local_syms,
12510 irela - 1, input_bfd))
12511 goto error_ret_free_internal;
12512 if (*tls_mask != 0)
12513 continue;
12514 }
12515
12516 if (stub_type == ppc_stub_plt_call
12517 && irela + 1 < irelaend
12518 && irela[1].r_offset == irela->r_offset + 4
12519 && ELF64_R_TYPE (irela[1].r_info) == R_PPC64_TOCSAVE)
12520 {
12521 if (!tocsave_find (htab, INSERT,
12522 &local_syms, irela + 1, input_bfd))
12523 goto error_ret_free_internal;
12524 }
12525 else if (stub_type == ppc_stub_plt_call)
12526 stub_type = ppc_stub_plt_call_r2save;
12527
12528 /* Support for grouping stub sections. */
12529 id_sec = htab->sec_info[section->id].u.group->link_sec;
12530
12531 /* Get the name of this stub. */
12532 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
12533 if (!stub_name)
12534 goto error_ret_free_internal;
12535
12536 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
12537 stub_name, FALSE, FALSE);
12538 if (stub_entry != NULL)
12539 {
12540 /* The proper stub has already been created. */
12541 free (stub_name);
12542 if (stub_type == ppc_stub_plt_call_r2save)
12543 stub_entry->stub_type = stub_type;
12544 continue;
12545 }
12546
12547 stub_entry = ppc_add_stub (stub_name, section, info);
12548 if (stub_entry == NULL)
12549 {
12550 free (stub_name);
12551 error_ret_free_internal:
12552 if (elf_section_data (section)->relocs == NULL)
12553 free (internal_relocs);
12554 error_ret_free_local:
12555 if (local_syms != NULL
12556 && (symtab_hdr->contents
12557 != (unsigned char *) local_syms))
12558 free (local_syms);
12559 return FALSE;
12560 }
12561
12562 stub_entry->stub_type = stub_type;
12563 if (stub_type != ppc_stub_plt_call
12564 && stub_type != ppc_stub_plt_call_r2save)
12565 {
12566 stub_entry->target_value = code_value;
12567 stub_entry->target_section = code_sec;
12568 }
12569 else
12570 {
12571 stub_entry->target_value = sym_value;
12572 stub_entry->target_section = sym_sec;
12573 }
12574 stub_entry->h = hash;
12575 stub_entry->plt_ent = plt_ent;
12576 stub_entry->other = hash ? hash->elf.other : sym->st_other;
12577
12578 if (stub_entry->h != NULL)
12579 htab->stub_globals += 1;
12580 }
12581
12582 /* We're done with the internal relocs, free them. */
12583 if (elf_section_data (section)->relocs != internal_relocs)
12584 free (internal_relocs);
12585 }
12586
12587 if (local_syms != NULL
12588 && symtab_hdr->contents != (unsigned char *) local_syms)
12589 {
12590 if (!info->keep_memory)
12591 free (local_syms);
12592 else
12593 symtab_hdr->contents = (unsigned char *) local_syms;
12594 }
12595 }
12596
12597 /* We may have added some stubs. Find out the new size of the
12598 stub sections. */
12599 for (stub_sec = htab->params->stub_bfd->sections;
12600 stub_sec != NULL;
12601 stub_sec = stub_sec->next)
12602 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12603 {
12604 stub_sec->rawsize = stub_sec->size;
12605 stub_sec->size = 0;
12606 stub_sec->reloc_count = 0;
12607 stub_sec->flags &= ~SEC_RELOC;
12608 }
12609
12610 htab->brlt->size = 0;
12611 htab->brlt->reloc_count = 0;
12612 htab->brlt->flags &= ~SEC_RELOC;
12613 if (htab->relbrlt != NULL)
12614 htab->relbrlt->size = 0;
12615
12616 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
12617
12618 for (group = htab->group; group != NULL; group = group->next)
12619 if (group->needs_save_res)
12620 group->stub_sec->size += htab->sfpr->size;
12621
12622 if (info->emitrelocations
12623 && htab->glink != NULL && htab->glink->size != 0)
12624 {
12625 htab->glink->reloc_count = 1;
12626 htab->glink->flags |= SEC_RELOC;
12627 }
12628
12629 if (htab->glink_eh_frame != NULL
12630 && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
12631 && htab->glink_eh_frame->output_section->size != 0)
12632 {
12633 size_t size = 0, align;
12634
12635 for (stub_sec = htab->params->stub_bfd->sections;
12636 stub_sec != NULL;
12637 stub_sec = stub_sec->next)
12638 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12639 size += 24;
12640 if (htab->glink != NULL && htab->glink->size != 0)
12641 size += 24;
12642 if (size != 0)
12643 size += sizeof (glink_eh_frame_cie);
12644 align = 1;
12645 align <<= htab->glink_eh_frame->output_section->alignment_power;
12646 align -= 1;
12647 size = (size + align) & ~align;
12648 htab->glink_eh_frame->rawsize = htab->glink_eh_frame->size;
12649 htab->glink_eh_frame->size = size;
12650 }
12651
12652 if (htab->params->plt_stub_align != 0)
12653 for (stub_sec = htab->params->stub_bfd->sections;
12654 stub_sec != NULL;
12655 stub_sec = stub_sec->next)
12656 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12657 stub_sec->size = ((stub_sec->size
12658 + (1 << htab->params->plt_stub_align) - 1)
12659 & -(1 << htab->params->plt_stub_align));
12660
12661 for (stub_sec = htab->params->stub_bfd->sections;
12662 stub_sec != NULL;
12663 stub_sec = stub_sec->next)
12664 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
12665 && stub_sec->rawsize != stub_sec->size
12666 && (htab->stub_iteration <= STUB_SHRINK_ITER
12667 || stub_sec->rawsize < stub_sec->size))
12668 break;
12669
12670 if (stub_sec == NULL
12671 && (htab->glink_eh_frame == NULL
12672 || htab->glink_eh_frame->rawsize == htab->glink_eh_frame->size))
12673 break;
12674
12675 /* Ask the linker to do its stuff. */
12676 (*htab->params->layout_sections_again) ();
12677 }
12678
12679 if (htab->glink_eh_frame != NULL
12680 && htab->glink_eh_frame->size != 0)
12681 {
12682 bfd_vma val;
12683 bfd_byte *p, *last_fde;
12684 size_t last_fde_len, size, align, pad;
12685 asection *stub_sec;
12686
12687 p = bfd_zalloc (htab->glink_eh_frame->owner, htab->glink_eh_frame->size);
12688 if (p == NULL)
12689 return FALSE;
12690 htab->glink_eh_frame->contents = p;
12691 last_fde = p;
12692
12693 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
12694 /* CIE length (rewrite in case little-endian). */
12695 last_fde_len = sizeof (glink_eh_frame_cie) - 4;
12696 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
12697 p += sizeof (glink_eh_frame_cie);
12698
12699 for (stub_sec = htab->params->stub_bfd->sections;
12700 stub_sec != NULL;
12701 stub_sec = stub_sec->next)
12702 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12703 {
12704 last_fde = p;
12705 last_fde_len = 20;
12706 /* FDE length. */
12707 bfd_put_32 (htab->elf.dynobj, 20, p);
12708 p += 4;
12709 /* CIE pointer. */
12710 val = p - htab->glink_eh_frame->contents;
12711 bfd_put_32 (htab->elf.dynobj, val, p);
12712 p += 4;
12713 /* Offset to stub section, written later. */
12714 p += 4;
12715 /* stub section size. */
12716 bfd_put_32 (htab->elf.dynobj, stub_sec->size, p);
12717 p += 4;
12718 /* Augmentation. */
12719 p += 1;
12720 /* Pad. */
12721 p += 7;
12722 }
12723 if (htab->glink != NULL && htab->glink->size != 0)
12724 {
12725 last_fde = p;
12726 last_fde_len = 20;
12727 /* FDE length. */
12728 bfd_put_32 (htab->elf.dynobj, 20, p);
12729 p += 4;
12730 /* CIE pointer. */
12731 val = p - htab->glink_eh_frame->contents;
12732 bfd_put_32 (htab->elf.dynobj, val, p);
12733 p += 4;
12734 /* Offset to .glink, written later. */
12735 p += 4;
12736 /* .glink size. */
12737 bfd_put_32 (htab->elf.dynobj, htab->glink->size - 8, p);
12738 p += 4;
12739 /* Augmentation. */
12740 p += 1;
12741
12742 *p++ = DW_CFA_advance_loc + 1;
12743 *p++ = DW_CFA_register;
12744 *p++ = 65;
12745 *p++ = htab->opd_abi ? 12 : 0;
12746 *p++ = DW_CFA_advance_loc + 4;
12747 *p++ = DW_CFA_restore_extended;
12748 *p++ = 65;
12749 }
12750 /* Subsume any padding into the last FDE if user .eh_frame
12751 sections are aligned more than glink_eh_frame. Otherwise any
12752 zero padding will be seen as a terminator. */
12753 size = p - htab->glink_eh_frame->contents;
12754 align = 1;
12755 align <<= htab->glink_eh_frame->output_section->alignment_power;
12756 align -= 1;
12757 pad = ((size + align) & ~align) - size;
12758 htab->glink_eh_frame->size = size + pad;
12759 bfd_put_32 (htab->elf.dynobj, last_fde_len + pad, last_fde);
12760 }
12761
12762 maybe_strip_output (info, htab->brlt);
12763 if (htab->glink_eh_frame != NULL)
12764 maybe_strip_output (info, htab->glink_eh_frame);
12765
12766 return TRUE;
12767 }
12768
12769 /* Called after we have determined section placement. If sections
12770 move, we'll be called again. Provide a value for TOCstart. */
12771
12772 bfd_vma
12773 ppc64_elf_set_toc (struct bfd_link_info *info, bfd *obfd)
12774 {
12775 asection *s;
12776 bfd_vma TOCstart, adjust;
12777
12778 if (info != NULL)
12779 {
12780 struct elf_link_hash_entry *h;
12781 struct elf_link_hash_table *htab = elf_hash_table (info);
12782
12783 if (is_elf_hash_table (htab)
12784 && htab->hgot != NULL)
12785 h = htab->hgot;
12786 else
12787 {
12788 h = elf_link_hash_lookup (htab, ".TOC.", FALSE, FALSE, TRUE);
12789 if (is_elf_hash_table (htab))
12790 htab->hgot = h;
12791 }
12792 if (h != NULL
12793 && h->root.type == bfd_link_hash_defined
12794 && !h->root.linker_def
12795 && (!is_elf_hash_table (htab)
12796 || h->def_regular))
12797 {
12798 TOCstart = (h->root.u.def.value - TOC_BASE_OFF
12799 + h->root.u.def.section->output_offset
12800 + h->root.u.def.section->output_section->vma);
12801 _bfd_set_gp_value (obfd, TOCstart);
12802 return TOCstart;
12803 }
12804 }
12805
12806 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
12807 order. The TOC starts where the first of these sections starts. */
12808 s = bfd_get_section_by_name (obfd, ".got");
12809 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12810 s = bfd_get_section_by_name (obfd, ".toc");
12811 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12812 s = bfd_get_section_by_name (obfd, ".tocbss");
12813 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12814 s = bfd_get_section_by_name (obfd, ".plt");
12815 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12816 {
12817 /* This may happen for
12818 o references to TOC base (SYM@toc / TOC[tc0]) without a
12819 .toc directive
12820 o bad linker script
12821 o --gc-sections and empty TOC sections
12822
12823 FIXME: Warn user? */
12824
12825 /* Look for a likely section. We probably won't even be
12826 using TOCstart. */
12827 for (s = obfd->sections; s != NULL; s = s->next)
12828 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY
12829 | SEC_EXCLUDE))
12830 == (SEC_ALLOC | SEC_SMALL_DATA))
12831 break;
12832 if (s == NULL)
12833 for (s = obfd->sections; s != NULL; s = s->next)
12834 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_EXCLUDE))
12835 == (SEC_ALLOC | SEC_SMALL_DATA))
12836 break;
12837 if (s == NULL)
12838 for (s = obfd->sections; s != NULL; s = s->next)
12839 if ((s->flags & (SEC_ALLOC | SEC_READONLY | SEC_EXCLUDE))
12840 == SEC_ALLOC)
12841 break;
12842 if (s == NULL)
12843 for (s = obfd->sections; s != NULL; s = s->next)
12844 if ((s->flags & (SEC_ALLOC | SEC_EXCLUDE)) == SEC_ALLOC)
12845 break;
12846 }
12847
12848 TOCstart = 0;
12849 if (s != NULL)
12850 TOCstart = s->output_section->vma + s->output_offset;
12851
12852 /* Force alignment. */
12853 adjust = TOCstart & (TOC_BASE_ALIGN - 1);
12854 TOCstart -= adjust;
12855 _bfd_set_gp_value (obfd, TOCstart);
12856
12857 if (info != NULL && s != NULL)
12858 {
12859 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12860
12861 if (htab != NULL)
12862 {
12863 if (htab->elf.hgot != NULL)
12864 {
12865 htab->elf.hgot->root.u.def.value = TOC_BASE_OFF - adjust;
12866 htab->elf.hgot->root.u.def.section = s;
12867 }
12868 }
12869 else
12870 {
12871 struct bfd_link_hash_entry *bh = NULL;
12872 _bfd_generic_link_add_one_symbol (info, obfd, ".TOC.", BSF_GLOBAL,
12873 s, TOC_BASE_OFF - adjust,
12874 NULL, FALSE, FALSE, &bh);
12875 }
12876 }
12877 return TOCstart;
12878 }
12879
12880 /* Called via elf_link_hash_traverse from ppc64_elf_build_stubs to
12881 write out any global entry stubs. */
12882
12883 static bfd_boolean
12884 build_global_entry_stubs (struct elf_link_hash_entry *h, void *inf)
12885 {
12886 struct bfd_link_info *info;
12887 struct ppc_link_hash_table *htab;
12888 struct plt_entry *pent;
12889 asection *s;
12890
12891 if (h->root.type == bfd_link_hash_indirect)
12892 return TRUE;
12893
12894 if (!h->pointer_equality_needed)
12895 return TRUE;
12896
12897 if (h->def_regular)
12898 return TRUE;
12899
12900 info = inf;
12901 htab = ppc_hash_table (info);
12902 if (htab == NULL)
12903 return FALSE;
12904
12905 s = htab->glink;
12906 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
12907 if (pent->plt.offset != (bfd_vma) -1
12908 && pent->addend == 0)
12909 {
12910 bfd_byte *p;
12911 asection *plt;
12912 bfd_vma off;
12913
12914 p = s->contents + h->root.u.def.value;
12915 plt = htab->elf.splt;
12916 if (!htab->elf.dynamic_sections_created
12917 || h->dynindx == -1)
12918 plt = htab->elf.iplt;
12919 off = pent->plt.offset + plt->output_offset + plt->output_section->vma;
12920 off -= h->root.u.def.value + s->output_offset + s->output_section->vma;
12921
12922 if (off + 0x80008000 > 0xffffffff || (off & 3) != 0)
12923 {
12924 info->callbacks->einfo
12925 (_("%P: linkage table error against `%T'\n"),
12926 h->root.root.string);
12927 bfd_set_error (bfd_error_bad_value);
12928 htab->stub_error = TRUE;
12929 }
12930
12931 htab->stub_count[ppc_stub_global_entry - 1] += 1;
12932 if (htab->params->emit_stub_syms)
12933 {
12934 size_t len = strlen (h->root.root.string);
12935 char *name = bfd_malloc (sizeof "12345678.global_entry." + len);
12936
12937 if (name == NULL)
12938 return FALSE;
12939
12940 sprintf (name, "%08x.global_entry.%s", s->id, h->root.root.string);
12941 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
12942 if (h == NULL)
12943 return FALSE;
12944 if (h->root.type == bfd_link_hash_new)
12945 {
12946 h->root.type = bfd_link_hash_defined;
12947 h->root.u.def.section = s;
12948 h->root.u.def.value = p - s->contents;
12949 h->ref_regular = 1;
12950 h->def_regular = 1;
12951 h->ref_regular_nonweak = 1;
12952 h->forced_local = 1;
12953 h->non_elf = 0;
12954 h->root.linker_def = 1;
12955 }
12956 }
12957
12958 if (PPC_HA (off) != 0)
12959 {
12960 bfd_put_32 (s->owner, ADDIS_R12_R12 | PPC_HA (off), p);
12961 p += 4;
12962 }
12963 bfd_put_32 (s->owner, LD_R12_0R12 | PPC_LO (off), p);
12964 p += 4;
12965 bfd_put_32 (s->owner, MTCTR_R12, p);
12966 p += 4;
12967 bfd_put_32 (s->owner, BCTR, p);
12968 break;
12969 }
12970 return TRUE;
12971 }
12972
12973 /* Build all the stubs associated with the current output file.
12974 The stubs are kept in a hash table attached to the main linker
12975 hash table. This function is called via gldelf64ppc_finish. */
12976
12977 bfd_boolean
12978 ppc64_elf_build_stubs (struct bfd_link_info *info,
12979 char **stats)
12980 {
12981 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12982 struct map_stub *group;
12983 asection *stub_sec;
12984 bfd_byte *p;
12985 int stub_sec_count = 0;
12986
12987 if (htab == NULL)
12988 return FALSE;
12989
12990 /* Allocate memory to hold the linker stubs. */
12991 for (stub_sec = htab->params->stub_bfd->sections;
12992 stub_sec != NULL;
12993 stub_sec = stub_sec->next)
12994 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
12995 && stub_sec->size != 0)
12996 {
12997 stub_sec->contents = bfd_zalloc (htab->params->stub_bfd, stub_sec->size);
12998 if (stub_sec->contents == NULL)
12999 return FALSE;
13000 stub_sec->size = 0;
13001 }
13002
13003 if (htab->glink != NULL && htab->glink->size != 0)
13004 {
13005 unsigned int indx;
13006 bfd_vma plt0;
13007
13008 /* Build the .glink plt call stub. */
13009 if (htab->params->emit_stub_syms)
13010 {
13011 struct elf_link_hash_entry *h;
13012 h = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
13013 TRUE, FALSE, FALSE);
13014 if (h == NULL)
13015 return FALSE;
13016 if (h->root.type == bfd_link_hash_new)
13017 {
13018 h->root.type = bfd_link_hash_defined;
13019 h->root.u.def.section = htab->glink;
13020 h->root.u.def.value = 8;
13021 h->ref_regular = 1;
13022 h->def_regular = 1;
13023 h->ref_regular_nonweak = 1;
13024 h->forced_local = 1;
13025 h->non_elf = 0;
13026 h->root.linker_def = 1;
13027 }
13028 }
13029 plt0 = (htab->elf.splt->output_section->vma
13030 + htab->elf.splt->output_offset
13031 - 16);
13032 if (info->emitrelocations)
13033 {
13034 Elf_Internal_Rela *r = get_relocs (htab->glink, 1);
13035 if (r == NULL)
13036 return FALSE;
13037 r->r_offset = (htab->glink->output_offset
13038 + htab->glink->output_section->vma);
13039 r->r_info = ELF64_R_INFO (0, R_PPC64_REL64);
13040 r->r_addend = plt0;
13041 }
13042 p = htab->glink->contents;
13043 plt0 -= htab->glink->output_section->vma + htab->glink->output_offset;
13044 bfd_put_64 (htab->glink->owner, plt0, p);
13045 p += 8;
13046 if (htab->opd_abi)
13047 {
13048 bfd_put_32 (htab->glink->owner, MFLR_R12, p);
13049 p += 4;
13050 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
13051 p += 4;
13052 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
13053 p += 4;
13054 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | (-16 & 0xfffc), p);
13055 p += 4;
13056 bfd_put_32 (htab->glink->owner, MTLR_R12, p);
13057 p += 4;
13058 bfd_put_32 (htab->glink->owner, ADD_R11_R2_R11, p);
13059 p += 4;
13060 bfd_put_32 (htab->glink->owner, LD_R12_0R11, p);
13061 p += 4;
13062 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | 8, p);
13063 p += 4;
13064 bfd_put_32 (htab->glink->owner, MTCTR_R12, p);
13065 p += 4;
13066 bfd_put_32 (htab->glink->owner, LD_R11_0R11 | 16, p);
13067 p += 4;
13068 }
13069 else
13070 {
13071 bfd_put_32 (htab->glink->owner, MFLR_R0, p);
13072 p += 4;
13073 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
13074 p += 4;
13075 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
13076 p += 4;
13077 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | (-16 & 0xfffc), p);
13078 p += 4;
13079 bfd_put_32 (htab->glink->owner, MTLR_R0, p);
13080 p += 4;
13081 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
13082 p += 4;
13083 bfd_put_32 (htab->glink->owner, ADD_R11_R2_R11, p);
13084 p += 4;
13085 bfd_put_32 (htab->glink->owner, ADDI_R0_R12 | (-48 & 0xffff), p);
13086 p += 4;
13087 bfd_put_32 (htab->glink->owner, LD_R12_0R11, p);
13088 p += 4;
13089 bfd_put_32 (htab->glink->owner, SRDI_R0_R0_2, p);
13090 p += 4;
13091 bfd_put_32 (htab->glink->owner, MTCTR_R12, p);
13092 p += 4;
13093 bfd_put_32 (htab->glink->owner, LD_R11_0R11 | 8, p);
13094 p += 4;
13095 }
13096 bfd_put_32 (htab->glink->owner, BCTR, p);
13097 p += 4;
13098 while (p - htab->glink->contents < GLINK_CALL_STUB_SIZE)
13099 {
13100 bfd_put_32 (htab->glink->owner, NOP, p);
13101 p += 4;
13102 }
13103
13104 /* Build the .glink lazy link call stubs. */
13105 indx = 0;
13106 while (p < htab->glink->contents + htab->glink->rawsize)
13107 {
13108 if (htab->opd_abi)
13109 {
13110 if (indx < 0x8000)
13111 {
13112 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
13113 p += 4;
13114 }
13115 else
13116 {
13117 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
13118 p += 4;
13119 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx),
13120 p);
13121 p += 4;
13122 }
13123 }
13124 bfd_put_32 (htab->glink->owner,
13125 B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p);
13126 indx++;
13127 p += 4;
13128 }
13129
13130 /* Build .glink global entry stubs. */
13131 if (htab->glink->size > htab->glink->rawsize)
13132 elf_link_hash_traverse (&htab->elf, build_global_entry_stubs, info);
13133 }
13134
13135 if (htab->brlt != NULL && htab->brlt->size != 0)
13136 {
13137 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
13138 htab->brlt->size);
13139 if (htab->brlt->contents == NULL)
13140 return FALSE;
13141 }
13142 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
13143 {
13144 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
13145 htab->relbrlt->size);
13146 if (htab->relbrlt->contents == NULL)
13147 return FALSE;
13148 }
13149
13150 /* Build the stubs as directed by the stub hash table. */
13151 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
13152
13153 for (group = htab->group; group != NULL; group = group->next)
13154 if (group->needs_save_res)
13155 {
13156 stub_sec = group->stub_sec;
13157 memcpy (stub_sec->contents + stub_sec->size, htab->sfpr->contents,
13158 htab->sfpr->size);
13159 if (htab->params->emit_stub_syms)
13160 {
13161 unsigned int i;
13162
13163 for (i = 0; i < ARRAY_SIZE (save_res_funcs); i++)
13164 if (!sfpr_define (info, &save_res_funcs[i], stub_sec))
13165 return FALSE;
13166 }
13167 stub_sec->size += htab->sfpr->size;
13168 }
13169
13170 if (htab->relbrlt != NULL)
13171 htab->relbrlt->reloc_count = 0;
13172
13173 if (htab->params->plt_stub_align != 0)
13174 for (stub_sec = htab->params->stub_bfd->sections;
13175 stub_sec != NULL;
13176 stub_sec = stub_sec->next)
13177 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
13178 stub_sec->size = ((stub_sec->size
13179 + (1 << htab->params->plt_stub_align) - 1)
13180 & -(1 << htab->params->plt_stub_align));
13181
13182 for (stub_sec = htab->params->stub_bfd->sections;
13183 stub_sec != NULL;
13184 stub_sec = stub_sec->next)
13185 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
13186 {
13187 stub_sec_count += 1;
13188 if (stub_sec->rawsize != stub_sec->size
13189 && (htab->stub_iteration <= STUB_SHRINK_ITER
13190 || stub_sec->rawsize < stub_sec->size))
13191 break;
13192 }
13193
13194 /* Note that the glink_eh_frame check here is not only testing that
13195 the generated size matched the calculated size but also that
13196 bfd_elf_discard_info didn't make any changes to the section. */
13197 if (stub_sec != NULL
13198 || (htab->glink_eh_frame != NULL
13199 && htab->glink_eh_frame->rawsize != htab->glink_eh_frame->size))
13200 {
13201 htab->stub_error = TRUE;
13202 info->callbacks->einfo (_("%P: stubs don't match calculated size\n"));
13203 }
13204
13205 if (htab->stub_error)
13206 return FALSE;
13207
13208 if (stats != NULL)
13209 {
13210 *stats = bfd_malloc (500);
13211 if (*stats == NULL)
13212 return FALSE;
13213
13214 sprintf (*stats, _("linker stubs in %u group%s\n"
13215 " branch %lu\n"
13216 " toc adjust %lu\n"
13217 " long branch %lu\n"
13218 " long toc adj %lu\n"
13219 " plt call %lu\n"
13220 " plt call toc %lu\n"
13221 " global entry %lu"),
13222 stub_sec_count,
13223 stub_sec_count == 1 ? "" : "s",
13224 htab->stub_count[ppc_stub_long_branch - 1],
13225 htab->stub_count[ppc_stub_long_branch_r2off - 1],
13226 htab->stub_count[ppc_stub_plt_branch - 1],
13227 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
13228 htab->stub_count[ppc_stub_plt_call - 1],
13229 htab->stub_count[ppc_stub_plt_call_r2save - 1],
13230 htab->stub_count[ppc_stub_global_entry - 1]);
13231 }
13232 return TRUE;
13233 }
13234
13235 /* This function undoes the changes made by add_symbol_adjust. */
13236
13237 static bfd_boolean
13238 undo_symbol_twiddle (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
13239 {
13240 struct ppc_link_hash_entry *eh;
13241
13242 if (h->root.type == bfd_link_hash_indirect)
13243 return TRUE;
13244
13245 eh = (struct ppc_link_hash_entry *) h;
13246 if (eh->elf.root.type != bfd_link_hash_undefweak || !eh->was_undefined)
13247 return TRUE;
13248
13249 eh->elf.root.type = bfd_link_hash_undefined;
13250 return TRUE;
13251 }
13252
13253 void
13254 ppc64_elf_restore_symbols (struct bfd_link_info *info)
13255 {
13256 struct ppc_link_hash_table *htab = ppc_hash_table (info);
13257
13258 if (htab != NULL)
13259 elf_link_hash_traverse (&htab->elf, undo_symbol_twiddle, info);
13260 }
13261
13262 /* What to do when ld finds relocations against symbols defined in
13263 discarded sections. */
13264
13265 static unsigned int
13266 ppc64_elf_action_discarded (asection *sec)
13267 {
13268 if (strcmp (".opd", sec->name) == 0)
13269 return 0;
13270
13271 if (strcmp (".toc", sec->name) == 0)
13272 return 0;
13273
13274 if (strcmp (".toc1", sec->name) == 0)
13275 return 0;
13276
13277 return _bfd_elf_default_action_discarded (sec);
13278 }
13279
13280 /* The RELOCATE_SECTION function is called by the ELF backend linker
13281 to handle the relocations for a section.
13282
13283 The relocs are always passed as Rela structures; if the section
13284 actually uses Rel structures, the r_addend field will always be
13285 zero.
13286
13287 This function is responsible for adjust the section contents as
13288 necessary, and (if using Rela relocs and generating a
13289 relocatable output file) adjusting the reloc addend as
13290 necessary.
13291
13292 This function does not have to worry about setting the reloc
13293 address or the reloc symbol index.
13294
13295 LOCAL_SYMS is a pointer to the swapped in local symbols.
13296
13297 LOCAL_SECTIONS is an array giving the section in the input file
13298 corresponding to the st_shndx field of each local symbol.
13299
13300 The global hash table entry for the global symbols can be found
13301 via elf_sym_hashes (input_bfd).
13302
13303 When generating relocatable output, this function must handle
13304 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
13305 going to be the section symbol corresponding to the output
13306 section, which means that the addend must be adjusted
13307 accordingly. */
13308
13309 static bfd_boolean
13310 ppc64_elf_relocate_section (bfd *output_bfd,
13311 struct bfd_link_info *info,
13312 bfd *input_bfd,
13313 asection *input_section,
13314 bfd_byte *contents,
13315 Elf_Internal_Rela *relocs,
13316 Elf_Internal_Sym *local_syms,
13317 asection **local_sections)
13318 {
13319 struct ppc_link_hash_table *htab;
13320 Elf_Internal_Shdr *symtab_hdr;
13321 struct elf_link_hash_entry **sym_hashes;
13322 Elf_Internal_Rela *rel;
13323 Elf_Internal_Rela *wrel;
13324 Elf_Internal_Rela *relend;
13325 Elf_Internal_Rela outrel;
13326 bfd_byte *loc;
13327 struct got_entry **local_got_ents;
13328 bfd_vma TOCstart;
13329 bfd_boolean ret = TRUE;
13330 bfd_boolean is_opd;
13331 /* Assume 'at' branch hints. */
13332 bfd_boolean is_isa_v2 = TRUE;
13333 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
13334
13335 /* Initialize howto table if needed. */
13336 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
13337 ppc_howto_init ();
13338
13339 htab = ppc_hash_table (info);
13340 if (htab == NULL)
13341 return FALSE;
13342
13343 /* Don't relocate stub sections. */
13344 if (input_section->owner == htab->params->stub_bfd)
13345 return TRUE;
13346
13347 BFD_ASSERT (is_ppc64_elf (input_bfd));
13348
13349 local_got_ents = elf_local_got_ents (input_bfd);
13350 TOCstart = elf_gp (output_bfd);
13351 symtab_hdr = &elf_symtab_hdr (input_bfd);
13352 sym_hashes = elf_sym_hashes (input_bfd);
13353 is_opd = ppc64_elf_section_data (input_section)->sec_type == sec_opd;
13354
13355 rel = wrel = relocs;
13356 relend = relocs + input_section->reloc_count;
13357 for (; rel < relend; wrel++, rel++)
13358 {
13359 enum elf_ppc64_reloc_type r_type;
13360 bfd_vma addend;
13361 bfd_reloc_status_type r;
13362 Elf_Internal_Sym *sym;
13363 asection *sec;
13364 struct elf_link_hash_entry *h_elf;
13365 struct ppc_link_hash_entry *h;
13366 struct ppc_link_hash_entry *fdh;
13367 const char *sym_name;
13368 unsigned long r_symndx, toc_symndx;
13369 bfd_vma toc_addend;
13370 unsigned char tls_mask, tls_gd, tls_type;
13371 unsigned char sym_type;
13372 bfd_vma relocation;
13373 bfd_boolean unresolved_reloc;
13374 bfd_boolean warned;
13375 enum { DEST_NORMAL, DEST_OPD, DEST_STUB } reloc_dest;
13376 unsigned int insn;
13377 unsigned int mask;
13378 struct ppc_stub_hash_entry *stub_entry;
13379 bfd_vma max_br_offset;
13380 bfd_vma from;
13381 Elf_Internal_Rela orig_rel;
13382 reloc_howto_type *howto;
13383 struct reloc_howto_struct alt_howto;
13384
13385 again:
13386 orig_rel = *rel;
13387
13388 r_type = ELF64_R_TYPE (rel->r_info);
13389 r_symndx = ELF64_R_SYM (rel->r_info);
13390
13391 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
13392 symbol of the previous ADDR64 reloc. The symbol gives us the
13393 proper TOC base to use. */
13394 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
13395 && wrel != relocs
13396 && ELF64_R_TYPE (wrel[-1].r_info) == R_PPC64_ADDR64
13397 && is_opd)
13398 r_symndx = ELF64_R_SYM (wrel[-1].r_info);
13399
13400 sym = NULL;
13401 sec = NULL;
13402 h_elf = NULL;
13403 sym_name = NULL;
13404 unresolved_reloc = FALSE;
13405 warned = FALSE;
13406
13407 if (r_symndx < symtab_hdr->sh_info)
13408 {
13409 /* It's a local symbol. */
13410 struct _opd_sec_data *opd;
13411
13412 sym = local_syms + r_symndx;
13413 sec = local_sections[r_symndx];
13414 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
13415 sym_type = ELF64_ST_TYPE (sym->st_info);
13416 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
13417 opd = get_opd_info (sec);
13418 if (opd != NULL && opd->adjust != NULL)
13419 {
13420 long adjust = opd->adjust[OPD_NDX (sym->st_value
13421 + rel->r_addend)];
13422 if (adjust == -1)
13423 relocation = 0;
13424 else
13425 {
13426 /* If this is a relocation against the opd section sym
13427 and we have edited .opd, adjust the reloc addend so
13428 that ld -r and ld --emit-relocs output is correct.
13429 If it is a reloc against some other .opd symbol,
13430 then the symbol value will be adjusted later. */
13431 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
13432 rel->r_addend += adjust;
13433 else
13434 relocation += adjust;
13435 }
13436 }
13437 }
13438 else
13439 {
13440 bfd_boolean ignored;
13441
13442 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
13443 r_symndx, symtab_hdr, sym_hashes,
13444 h_elf, sec, relocation,
13445 unresolved_reloc, warned, ignored);
13446 sym_name = h_elf->root.root.string;
13447 sym_type = h_elf->type;
13448 if (sec != NULL
13449 && sec->owner == output_bfd
13450 && strcmp (sec->name, ".opd") == 0)
13451 {
13452 /* This is a symbol defined in a linker script. All
13453 such are defined in output sections, even those
13454 defined by simple assignment from a symbol defined in
13455 an input section. Transfer the symbol to an
13456 appropriate input .opd section, so that a branch to
13457 this symbol will be mapped to the location specified
13458 by the opd entry. */
13459 struct bfd_link_order *lo;
13460 for (lo = sec->map_head.link_order; lo != NULL; lo = lo->next)
13461 if (lo->type == bfd_indirect_link_order)
13462 {
13463 asection *isec = lo->u.indirect.section;
13464 if (h_elf->root.u.def.value >= isec->output_offset
13465 && h_elf->root.u.def.value < (isec->output_offset
13466 + isec->size))
13467 {
13468 h_elf->root.u.def.value -= isec->output_offset;
13469 h_elf->root.u.def.section = isec;
13470 sec = isec;
13471 break;
13472 }
13473 }
13474 }
13475 }
13476 h = (struct ppc_link_hash_entry *) h_elf;
13477
13478 if (sec != NULL && discarded_section (sec))
13479 {
13480 _bfd_clear_contents (ppc64_elf_howto_table[r_type],
13481 input_bfd, input_section,
13482 contents + rel->r_offset);
13483 wrel->r_offset = rel->r_offset;
13484 wrel->r_info = 0;
13485 wrel->r_addend = 0;
13486
13487 /* For ld -r, remove relocations in debug sections against
13488 sections defined in discarded sections. Not done for
13489 non-debug to preserve relocs in .eh_frame which the
13490 eh_frame editing code expects to be present. */
13491 if (bfd_link_relocatable (info)
13492 && (input_section->flags & SEC_DEBUGGING))
13493 wrel--;
13494
13495 continue;
13496 }
13497
13498 if (bfd_link_relocatable (info))
13499 goto copy_reloc;
13500
13501 if (h != NULL && &h->elf == htab->elf.hgot)
13502 {
13503 relocation = TOCstart + htab->sec_info[input_section->id].toc_off;
13504 sec = bfd_abs_section_ptr;
13505 unresolved_reloc = FALSE;
13506 }
13507
13508 /* TLS optimizations. Replace instruction sequences and relocs
13509 based on information we collected in tls_optimize. We edit
13510 RELOCS so that --emit-relocs will output something sensible
13511 for the final instruction stream. */
13512 tls_mask = 0;
13513 tls_gd = 0;
13514 toc_symndx = 0;
13515 if (h != NULL)
13516 tls_mask = h->tls_mask;
13517 else if (local_got_ents != NULL)
13518 {
13519 struct plt_entry **local_plt = (struct plt_entry **)
13520 (local_got_ents + symtab_hdr->sh_info);
13521 unsigned char *lgot_masks = (unsigned char *)
13522 (local_plt + symtab_hdr->sh_info);
13523 tls_mask = lgot_masks[r_symndx];
13524 }
13525 if (tls_mask == 0
13526 && (r_type == R_PPC64_TLS
13527 || r_type == R_PPC64_TLSGD
13528 || r_type == R_PPC64_TLSLD))
13529 {
13530 /* Check for toc tls entries. */
13531 unsigned char *toc_tls;
13532
13533 if (!get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
13534 &local_syms, rel, input_bfd))
13535 return FALSE;
13536
13537 if (toc_tls)
13538 tls_mask = *toc_tls;
13539 }
13540
13541 /* Check that tls relocs are used with tls syms, and non-tls
13542 relocs are used with non-tls syms. */
13543 if (r_symndx != STN_UNDEF
13544 && r_type != R_PPC64_NONE
13545 && (h == NULL
13546 || h->elf.root.type == bfd_link_hash_defined
13547 || h->elf.root.type == bfd_link_hash_defweak)
13548 && (IS_PPC64_TLS_RELOC (r_type)
13549 != (sym_type == STT_TLS
13550 || (sym_type == STT_SECTION
13551 && (sec->flags & SEC_THREAD_LOCAL) != 0))))
13552 {
13553 if (tls_mask != 0
13554 && (r_type == R_PPC64_TLS
13555 || r_type == R_PPC64_TLSGD
13556 || r_type == R_PPC64_TLSLD))
13557 /* R_PPC64_TLS is OK against a symbol in the TOC. */
13558 ;
13559 else
13560 info->callbacks->einfo
13561 (!IS_PPC64_TLS_RELOC (r_type)
13562 ? _("%P: %H: %s used with TLS symbol `%T'\n")
13563 : _("%P: %H: %s used with non-TLS symbol `%T'\n"),
13564 input_bfd, input_section, rel->r_offset,
13565 ppc64_elf_howto_table[r_type]->name,
13566 sym_name);
13567 }
13568
13569 /* Ensure reloc mapping code below stays sane. */
13570 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
13571 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
13572 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
13573 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
13574 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
13575 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
13576 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
13577 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
13578 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
13579 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
13580 abort ();
13581
13582 switch (r_type)
13583 {
13584 default:
13585 break;
13586
13587 case R_PPC64_LO_DS_OPT:
13588 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
13589 if ((insn & (0x3f << 26)) != 58u << 26)
13590 abort ();
13591 insn += (14u << 26) - (58u << 26);
13592 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
13593 r_type = R_PPC64_TOC16_LO;
13594 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13595 break;
13596
13597 case R_PPC64_TOC16:
13598 case R_PPC64_TOC16_LO:
13599 case R_PPC64_TOC16_DS:
13600 case R_PPC64_TOC16_LO_DS:
13601 {
13602 /* Check for toc tls entries. */
13603 unsigned char *toc_tls;
13604 int retval;
13605
13606 retval = get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
13607 &local_syms, rel, input_bfd);
13608 if (retval == 0)
13609 return FALSE;
13610
13611 if (toc_tls)
13612 {
13613 tls_mask = *toc_tls;
13614 if (r_type == R_PPC64_TOC16_DS
13615 || r_type == R_PPC64_TOC16_LO_DS)
13616 {
13617 if (tls_mask != 0
13618 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
13619 goto toctprel;
13620 }
13621 else
13622 {
13623 /* If we found a GD reloc pair, then we might be
13624 doing a GD->IE transition. */
13625 if (retval == 2)
13626 {
13627 tls_gd = TLS_TPRELGD;
13628 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13629 goto tls_ldgd_opt;
13630 }
13631 else if (retval == 3)
13632 {
13633 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13634 goto tls_ldgd_opt;
13635 }
13636 }
13637 }
13638 }
13639 break;
13640
13641 case R_PPC64_GOT_TPREL16_HI:
13642 case R_PPC64_GOT_TPREL16_HA:
13643 if (tls_mask != 0
13644 && (tls_mask & TLS_TPREL) == 0)
13645 {
13646 rel->r_offset -= d_offset;
13647 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
13648 r_type = R_PPC64_NONE;
13649 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13650 }
13651 break;
13652
13653 case R_PPC64_GOT_TPREL16_DS:
13654 case R_PPC64_GOT_TPREL16_LO_DS:
13655 if (tls_mask != 0
13656 && (tls_mask & TLS_TPREL) == 0)
13657 {
13658 toctprel:
13659 insn = bfd_get_32 (output_bfd,
13660 contents + rel->r_offset - d_offset);
13661 insn &= 31 << 21;
13662 insn |= 0x3c0d0000; /* addis 0,13,0 */
13663 bfd_put_32 (output_bfd, insn,
13664 contents + rel->r_offset - d_offset);
13665 r_type = R_PPC64_TPREL16_HA;
13666 if (toc_symndx != 0)
13667 {
13668 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
13669 rel->r_addend = toc_addend;
13670 /* We changed the symbol. Start over in order to
13671 get h, sym, sec etc. right. */
13672 goto again;
13673 }
13674 else
13675 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13676 }
13677 break;
13678
13679 case R_PPC64_TLS:
13680 if (tls_mask != 0
13681 && (tls_mask & TLS_TPREL) == 0)
13682 {
13683 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
13684 insn = _bfd_elf_ppc_at_tls_transform (insn, 13);
13685 if (insn == 0)
13686 abort ();
13687 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
13688 /* Was PPC64_TLS which sits on insn boundary, now
13689 PPC64_TPREL16_LO which is at low-order half-word. */
13690 rel->r_offset += d_offset;
13691 r_type = R_PPC64_TPREL16_LO;
13692 if (toc_symndx != 0)
13693 {
13694 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
13695 rel->r_addend = toc_addend;
13696 /* We changed the symbol. Start over in order to
13697 get h, sym, sec etc. right. */
13698 goto again;
13699 }
13700 else
13701 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13702 }
13703 break;
13704
13705 case R_PPC64_GOT_TLSGD16_HI:
13706 case R_PPC64_GOT_TLSGD16_HA:
13707 tls_gd = TLS_TPRELGD;
13708 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13709 goto tls_gdld_hi;
13710 break;
13711
13712 case R_PPC64_GOT_TLSLD16_HI:
13713 case R_PPC64_GOT_TLSLD16_HA:
13714 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13715 {
13716 tls_gdld_hi:
13717 if ((tls_mask & tls_gd) != 0)
13718 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
13719 + R_PPC64_GOT_TPREL16_DS);
13720 else
13721 {
13722 rel->r_offset -= d_offset;
13723 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
13724 r_type = R_PPC64_NONE;
13725 }
13726 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13727 }
13728 break;
13729
13730 case R_PPC64_GOT_TLSGD16:
13731 case R_PPC64_GOT_TLSGD16_LO:
13732 tls_gd = TLS_TPRELGD;
13733 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13734 goto tls_ldgd_opt;
13735 break;
13736
13737 case R_PPC64_GOT_TLSLD16:
13738 case R_PPC64_GOT_TLSLD16_LO:
13739 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13740 {
13741 unsigned int insn1, insn2, insn3;
13742 bfd_vma offset;
13743
13744 tls_ldgd_opt:
13745 offset = (bfd_vma) -1;
13746 /* If not using the newer R_PPC64_TLSGD/LD to mark
13747 __tls_get_addr calls, we must trust that the call
13748 stays with its arg setup insns, ie. that the next
13749 reloc is the __tls_get_addr call associated with
13750 the current reloc. Edit both insns. */
13751 if (input_section->has_tls_get_addr_call
13752 && rel + 1 < relend
13753 && branch_reloc_hash_match (input_bfd, rel + 1,
13754 htab->tls_get_addr,
13755 htab->tls_get_addr_fd))
13756 offset = rel[1].r_offset;
13757 /* We read the low GOT_TLS (or TOC16) insn because we
13758 need to keep the destination reg. It may be
13759 something other than the usual r3, and moved to r3
13760 before the call by intervening code. */
13761 insn1 = bfd_get_32 (output_bfd,
13762 contents + rel->r_offset - d_offset);
13763 if ((tls_mask & tls_gd) != 0)
13764 {
13765 /* IE */
13766 insn1 &= (0x1f << 21) | (0x1f << 16);
13767 insn1 |= 58 << 26; /* ld */
13768 insn2 = 0x7c636a14; /* add 3,3,13 */
13769 if (offset != (bfd_vma) -1)
13770 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13771 if ((tls_mask & TLS_EXPLICIT) == 0)
13772 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
13773 + R_PPC64_GOT_TPREL16_DS);
13774 else
13775 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
13776 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13777 }
13778 else
13779 {
13780 /* LE */
13781 insn1 &= 0x1f << 21;
13782 insn1 |= 0x3c0d0000; /* addis r,13,0 */
13783 insn2 = 0x38630000; /* addi 3,3,0 */
13784 if (tls_gd == 0)
13785 {
13786 /* Was an LD reloc. */
13787 if (toc_symndx)
13788 sec = local_sections[toc_symndx];
13789 for (r_symndx = 0;
13790 r_symndx < symtab_hdr->sh_info;
13791 r_symndx++)
13792 if (local_sections[r_symndx] == sec)
13793 break;
13794 if (r_symndx >= symtab_hdr->sh_info)
13795 r_symndx = STN_UNDEF;
13796 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
13797 if (r_symndx != STN_UNDEF)
13798 rel->r_addend -= (local_syms[r_symndx].st_value
13799 + sec->output_offset
13800 + sec->output_section->vma);
13801 }
13802 else if (toc_symndx != 0)
13803 {
13804 r_symndx = toc_symndx;
13805 rel->r_addend = toc_addend;
13806 }
13807 r_type = R_PPC64_TPREL16_HA;
13808 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13809 if (offset != (bfd_vma) -1)
13810 {
13811 rel[1].r_info = ELF64_R_INFO (r_symndx,
13812 R_PPC64_TPREL16_LO);
13813 rel[1].r_offset = offset + d_offset;
13814 rel[1].r_addend = rel->r_addend;
13815 }
13816 }
13817 bfd_put_32 (output_bfd, insn1,
13818 contents + rel->r_offset - d_offset);
13819 if (offset != (bfd_vma) -1)
13820 {
13821 insn3 = bfd_get_32 (output_bfd,
13822 contents + offset + 4);
13823 if (insn3 == NOP
13824 || insn3 == CROR_151515 || insn3 == CROR_313131)
13825 {
13826 rel[1].r_offset += 4;
13827 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
13828 insn2 = NOP;
13829 }
13830 bfd_put_32 (output_bfd, insn2, contents + offset);
13831 }
13832 if ((tls_mask & tls_gd) == 0
13833 && (tls_gd == 0 || toc_symndx != 0))
13834 {
13835 /* We changed the symbol. Start over in order
13836 to get h, sym, sec etc. right. */
13837 goto again;
13838 }
13839 }
13840 break;
13841
13842 case R_PPC64_TLSGD:
13843 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13844 {
13845 unsigned int insn2, insn3;
13846 bfd_vma offset = rel->r_offset;
13847
13848 if ((tls_mask & TLS_TPRELGD) != 0)
13849 {
13850 /* IE */
13851 r_type = R_PPC64_NONE;
13852 insn2 = 0x7c636a14; /* add 3,3,13 */
13853 }
13854 else
13855 {
13856 /* LE */
13857 if (toc_symndx != 0)
13858 {
13859 r_symndx = toc_symndx;
13860 rel->r_addend = toc_addend;
13861 }
13862 r_type = R_PPC64_TPREL16_LO;
13863 rel->r_offset = offset + d_offset;
13864 insn2 = 0x38630000; /* addi 3,3,0 */
13865 }
13866 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13867 /* Zap the reloc on the _tls_get_addr call too. */
13868 BFD_ASSERT (offset == rel[1].r_offset);
13869 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13870 insn3 = bfd_get_32 (output_bfd,
13871 contents + offset + 4);
13872 if (insn3 == NOP
13873 || insn3 == CROR_151515 || insn3 == CROR_313131)
13874 {
13875 rel->r_offset += 4;
13876 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
13877 insn2 = NOP;
13878 }
13879 bfd_put_32 (output_bfd, insn2, contents + offset);
13880 if ((tls_mask & TLS_TPRELGD) == 0 && toc_symndx != 0)
13881 goto again;
13882 }
13883 break;
13884
13885 case R_PPC64_TLSLD:
13886 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13887 {
13888 unsigned int insn2, insn3;
13889 bfd_vma offset = rel->r_offset;
13890
13891 if (toc_symndx)
13892 sec = local_sections[toc_symndx];
13893 for (r_symndx = 0;
13894 r_symndx < symtab_hdr->sh_info;
13895 r_symndx++)
13896 if (local_sections[r_symndx] == sec)
13897 break;
13898 if (r_symndx >= symtab_hdr->sh_info)
13899 r_symndx = STN_UNDEF;
13900 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
13901 if (r_symndx != STN_UNDEF)
13902 rel->r_addend -= (local_syms[r_symndx].st_value
13903 + sec->output_offset
13904 + sec->output_section->vma);
13905
13906 r_type = R_PPC64_TPREL16_LO;
13907 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13908 rel->r_offset = offset + d_offset;
13909 /* Zap the reloc on the _tls_get_addr call too. */
13910 BFD_ASSERT (offset == rel[1].r_offset);
13911 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13912 insn2 = 0x38630000; /* addi 3,3,0 */
13913 insn3 = bfd_get_32 (output_bfd,
13914 contents + offset + 4);
13915 if (insn3 == NOP
13916 || insn3 == CROR_151515 || insn3 == CROR_313131)
13917 {
13918 rel->r_offset += 4;
13919 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
13920 insn2 = NOP;
13921 }
13922 bfd_put_32 (output_bfd, insn2, contents + offset);
13923 goto again;
13924 }
13925 break;
13926
13927 case R_PPC64_DTPMOD64:
13928 if (rel + 1 < relend
13929 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
13930 && rel[1].r_offset == rel->r_offset + 8)
13931 {
13932 if ((tls_mask & TLS_GD) == 0)
13933 {
13934 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
13935 if ((tls_mask & TLS_TPRELGD) != 0)
13936 r_type = R_PPC64_TPREL64;
13937 else
13938 {
13939 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
13940 r_type = R_PPC64_NONE;
13941 }
13942 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13943 }
13944 }
13945 else
13946 {
13947 if ((tls_mask & TLS_LD) == 0)
13948 {
13949 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
13950 r_type = R_PPC64_NONE;
13951 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13952 }
13953 }
13954 break;
13955
13956 case R_PPC64_TPREL64:
13957 if ((tls_mask & TLS_TPREL) == 0)
13958 {
13959 r_type = R_PPC64_NONE;
13960 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13961 }
13962 break;
13963
13964 case R_PPC64_ENTRY:
13965 relocation = TOCstart + htab->sec_info[input_section->id].toc_off;
13966 if (!bfd_link_pic (info)
13967 && !info->traditional_format
13968 && relocation + 0x80008000 <= 0xffffffff)
13969 {
13970 unsigned int insn1, insn2;
13971
13972 insn1 = bfd_get_32 (input_bfd, contents + rel->r_offset);
13973 insn2 = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
13974 if ((insn1 & ~0xfffc) == LD_R2_0R12
13975 && insn2 == ADD_R2_R2_R12)
13976 {
13977 bfd_put_32 (output_bfd,
13978 LIS_R2 + PPC_HA (relocation),
13979 contents + rel->r_offset);
13980 bfd_put_32 (output_bfd,
13981 ADDI_R2_R2 + PPC_LO (relocation),
13982 contents + rel->r_offset + 4);
13983 }
13984 }
13985 else
13986 {
13987 relocation -= (rel->r_offset
13988 + input_section->output_offset
13989 + input_section->output_section->vma);
13990 if (relocation + 0x80008000 <= 0xffffffff)
13991 {
13992 unsigned int insn1, insn2;
13993
13994 insn1 = bfd_get_32 (input_bfd, contents + rel->r_offset);
13995 insn2 = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
13996 if ((insn1 & ~0xfffc) == LD_R2_0R12
13997 && insn2 == ADD_R2_R2_R12)
13998 {
13999 bfd_put_32 (output_bfd,
14000 ADDIS_R2_R12 + PPC_HA (relocation),
14001 contents + rel->r_offset);
14002 bfd_put_32 (output_bfd,
14003 ADDI_R2_R2 + PPC_LO (relocation),
14004 contents + rel->r_offset + 4);
14005 }
14006 }
14007 }
14008 break;
14009
14010 case R_PPC64_REL16_HA:
14011 /* If we are generating a non-PIC executable, edit
14012 . 0: addis 2,12,.TOC.-0b@ha
14013 . addi 2,2,.TOC.-0b@l
14014 used by ELFv2 global entry points to set up r2, to
14015 . lis 2,.TOC.@ha
14016 . addi 2,2,.TOC.@l
14017 if .TOC. is in range. */
14018 if (!bfd_link_pic (info)
14019 && !info->traditional_format
14020 && !htab->opd_abi
14021 && rel->r_addend == d_offset
14022 && h != NULL && &h->elf == htab->elf.hgot
14023 && rel + 1 < relend
14024 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_REL16_LO)
14025 && rel[1].r_offset == rel->r_offset + 4
14026 && rel[1].r_addend == rel->r_addend + 4
14027 && relocation + 0x80008000 <= 0xffffffff)
14028 {
14029 unsigned int insn1, insn2;
14030 bfd_vma offset = rel->r_offset - d_offset;
14031 insn1 = bfd_get_32 (output_bfd, contents + offset);
14032 insn2 = bfd_get_32 (output_bfd, contents + offset + 4);
14033 if ((insn1 & 0xffff0000) == ADDIS_R2_R12
14034 && (insn2 & 0xffff0000) == ADDI_R2_R2)
14035 {
14036 r_type = R_PPC64_ADDR16_HA;
14037 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14038 rel->r_addend -= d_offset;
14039 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_ADDR16_LO);
14040 rel[1].r_addend -= d_offset + 4;
14041 bfd_put_32 (output_bfd, LIS_R2, contents + offset);
14042 }
14043 }
14044 break;
14045 }
14046
14047 /* Handle other relocations that tweak non-addend part of insn. */
14048 insn = 0;
14049 max_br_offset = 1 << 25;
14050 addend = rel->r_addend;
14051 reloc_dest = DEST_NORMAL;
14052 switch (r_type)
14053 {
14054 default:
14055 break;
14056
14057 case R_PPC64_TOCSAVE:
14058 if (relocation + addend == (rel->r_offset
14059 + input_section->output_offset
14060 + input_section->output_section->vma)
14061 && tocsave_find (htab, NO_INSERT,
14062 &local_syms, rel, input_bfd))
14063 {
14064 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
14065 if (insn == NOP
14066 || insn == CROR_151515 || insn == CROR_313131)
14067 bfd_put_32 (input_bfd,
14068 STD_R2_0R1 + STK_TOC (htab),
14069 contents + rel->r_offset);
14070 }
14071 break;
14072
14073 /* Branch taken prediction relocations. */
14074 case R_PPC64_ADDR14_BRTAKEN:
14075 case R_PPC64_REL14_BRTAKEN:
14076 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
14077 /* Fall through. */
14078
14079 /* Branch not taken prediction relocations. */
14080 case R_PPC64_ADDR14_BRNTAKEN:
14081 case R_PPC64_REL14_BRNTAKEN:
14082 insn |= bfd_get_32 (output_bfd,
14083 contents + rel->r_offset) & ~(0x01 << 21);
14084 /* Fall through. */
14085
14086 case R_PPC64_REL14:
14087 max_br_offset = 1 << 15;
14088 /* Fall through. */
14089
14090 case R_PPC64_REL24:
14091 /* Calls to functions with a different TOC, such as calls to
14092 shared objects, need to alter the TOC pointer. This is
14093 done using a linkage stub. A REL24 branching to these
14094 linkage stubs needs to be followed by a nop, as the nop
14095 will be replaced with an instruction to restore the TOC
14096 base pointer. */
14097 fdh = h;
14098 if (h != NULL
14099 && h->oh != NULL
14100 && h->oh->is_func_descriptor)
14101 fdh = ppc_follow_link (h->oh);
14102 stub_entry = ppc_get_stub_entry (input_section, sec, fdh, &orig_rel,
14103 htab);
14104 if (stub_entry != NULL
14105 && (stub_entry->stub_type == ppc_stub_plt_call
14106 || stub_entry->stub_type == ppc_stub_plt_call_r2save
14107 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
14108 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
14109 {
14110 bfd_boolean can_plt_call = FALSE;
14111
14112 /* All of these stubs will modify r2, so there must be a
14113 branch and link followed by a nop. The nop is
14114 replaced by an insn to restore r2. */
14115 if (rel->r_offset + 8 <= input_section->size)
14116 {
14117 unsigned long br;
14118
14119 br = bfd_get_32 (input_bfd,
14120 contents + rel->r_offset);
14121 if ((br & 1) != 0)
14122 {
14123 unsigned long nop;
14124
14125 nop = bfd_get_32 (input_bfd,
14126 contents + rel->r_offset + 4);
14127 if (nop == NOP
14128 || nop == CROR_151515 || nop == CROR_313131)
14129 {
14130 if (h != NULL
14131 && (h == htab->tls_get_addr_fd
14132 || h == htab->tls_get_addr)
14133 && htab->params->tls_get_addr_opt)
14134 {
14135 /* Special stub used, leave nop alone. */
14136 }
14137 else
14138 bfd_put_32 (input_bfd,
14139 LD_R2_0R1 + STK_TOC (htab),
14140 contents + rel->r_offset + 4);
14141 can_plt_call = TRUE;
14142 }
14143 }
14144 }
14145
14146 if (!can_plt_call && h != NULL)
14147 {
14148 const char *name = h->elf.root.root.string;
14149
14150 if (*name == '.')
14151 ++name;
14152
14153 if (strncmp (name, "__libc_start_main", 17) == 0
14154 && (name[17] == 0 || name[17] == '@'))
14155 {
14156 /* Allow crt1 branch to go via a toc adjusting
14157 stub. Other calls that never return could do
14158 the same, if we could detect such. */
14159 can_plt_call = TRUE;
14160 }
14161 }
14162
14163 if (!can_plt_call)
14164 {
14165 /* g++ as of 20130507 emits self-calls without a
14166 following nop. This is arguably wrong since we
14167 have conflicting information. On the one hand a
14168 global symbol and on the other a local call
14169 sequence, but don't error for this special case.
14170 It isn't possible to cheaply verify we have
14171 exactly such a call. Allow all calls to the same
14172 section. */
14173 asection *code_sec = sec;
14174
14175 if (get_opd_info (sec) != NULL)
14176 {
14177 bfd_vma off = (relocation + addend
14178 - sec->output_section->vma
14179 - sec->output_offset);
14180
14181 opd_entry_value (sec, off, &code_sec, NULL, FALSE);
14182 }
14183 if (code_sec == input_section)
14184 can_plt_call = TRUE;
14185 }
14186
14187 if (!can_plt_call)
14188 {
14189 if (stub_entry->stub_type == ppc_stub_plt_call
14190 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14191 info->callbacks->einfo
14192 (_("%P: %H: call to `%T' lacks nop, can't restore toc; "
14193 "recompile with -fPIC\n"),
14194 input_bfd, input_section, rel->r_offset, sym_name);
14195 else
14196 info->callbacks->einfo
14197 (_("%P: %H: call to `%T' lacks nop, can't restore toc; "
14198 "(-mcmodel=small toc adjust stub)\n"),
14199 input_bfd, input_section, rel->r_offset, sym_name);
14200
14201 bfd_set_error (bfd_error_bad_value);
14202 ret = FALSE;
14203 }
14204
14205 if (can_plt_call
14206 && (stub_entry->stub_type == ppc_stub_plt_call
14207 || stub_entry->stub_type == ppc_stub_plt_call_r2save))
14208 unresolved_reloc = FALSE;
14209 }
14210
14211 if ((stub_entry == NULL
14212 || stub_entry->stub_type == ppc_stub_long_branch
14213 || stub_entry->stub_type == ppc_stub_plt_branch)
14214 && get_opd_info (sec) != NULL)
14215 {
14216 /* The branch destination is the value of the opd entry. */
14217 bfd_vma off = (relocation + addend
14218 - sec->output_section->vma
14219 - sec->output_offset);
14220 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL, FALSE);
14221 if (dest != (bfd_vma) -1)
14222 {
14223 relocation = dest;
14224 addend = 0;
14225 reloc_dest = DEST_OPD;
14226 }
14227 }
14228
14229 /* If the branch is out of reach we ought to have a long
14230 branch stub. */
14231 from = (rel->r_offset
14232 + input_section->output_offset
14233 + input_section->output_section->vma);
14234
14235 relocation += PPC64_LOCAL_ENTRY_OFFSET (fdh
14236 ? fdh->elf.other
14237 : sym->st_other);
14238
14239 if (stub_entry != NULL
14240 && (stub_entry->stub_type == ppc_stub_long_branch
14241 || stub_entry->stub_type == ppc_stub_plt_branch)
14242 && (r_type == R_PPC64_ADDR14_BRTAKEN
14243 || r_type == R_PPC64_ADDR14_BRNTAKEN
14244 || (relocation + addend - from + max_br_offset
14245 < 2 * max_br_offset)))
14246 /* Don't use the stub if this branch is in range. */
14247 stub_entry = NULL;
14248
14249 if (stub_entry != NULL)
14250 {
14251 /* Munge up the value and addend so that we call the stub
14252 rather than the procedure directly. */
14253 asection *stub_sec = stub_entry->group->stub_sec;
14254
14255 if (stub_entry->stub_type == ppc_stub_save_res)
14256 relocation += (stub_sec->output_offset
14257 + stub_sec->output_section->vma
14258 + stub_sec->size - htab->sfpr->size
14259 - htab->sfpr->output_offset
14260 - htab->sfpr->output_section->vma);
14261 else
14262 relocation = (stub_entry->stub_offset
14263 + stub_sec->output_offset
14264 + stub_sec->output_section->vma);
14265 addend = 0;
14266 reloc_dest = DEST_STUB;
14267
14268 if ((stub_entry->stub_type == ppc_stub_plt_call
14269 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14270 && (ALWAYS_EMIT_R2SAVE
14271 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14272 && rel + 1 < relend
14273 && rel[1].r_offset == rel->r_offset + 4
14274 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOCSAVE)
14275 relocation += 4;
14276 }
14277
14278 if (insn != 0)
14279 {
14280 if (is_isa_v2)
14281 {
14282 /* Set 'a' bit. This is 0b00010 in BO field for branch
14283 on CR(BI) insns (BO == 001at or 011at), and 0b01000
14284 for branch on CTR insns (BO == 1a00t or 1a01t). */
14285 if ((insn & (0x14 << 21)) == (0x04 << 21))
14286 insn |= 0x02 << 21;
14287 else if ((insn & (0x14 << 21)) == (0x10 << 21))
14288 insn |= 0x08 << 21;
14289 else
14290 break;
14291 }
14292 else
14293 {
14294 /* Invert 'y' bit if not the default. */
14295 if ((bfd_signed_vma) (relocation + addend - from) < 0)
14296 insn ^= 0x01 << 21;
14297 }
14298
14299 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
14300 }
14301
14302 /* NOP out calls to undefined weak functions.
14303 We can thus call a weak function without first
14304 checking whether the function is defined. */
14305 else if (h != NULL
14306 && h->elf.root.type == bfd_link_hash_undefweak
14307 && h->elf.dynindx == -1
14308 && r_type == R_PPC64_REL24
14309 && relocation == 0
14310 && addend == 0)
14311 {
14312 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
14313 goto copy_reloc;
14314 }
14315 break;
14316 }
14317
14318 /* Set `addend'. */
14319 tls_type = 0;
14320 switch (r_type)
14321 {
14322 default:
14323 info->callbacks->einfo
14324 (_("%P: %B: unknown relocation type %d for `%T'\n"),
14325 input_bfd, (int) r_type, sym_name);
14326
14327 bfd_set_error (bfd_error_bad_value);
14328 ret = FALSE;
14329 goto copy_reloc;
14330
14331 case R_PPC64_NONE:
14332 case R_PPC64_TLS:
14333 case R_PPC64_TLSGD:
14334 case R_PPC64_TLSLD:
14335 case R_PPC64_TOCSAVE:
14336 case R_PPC64_GNU_VTINHERIT:
14337 case R_PPC64_GNU_VTENTRY:
14338 case R_PPC64_ENTRY:
14339 goto copy_reloc;
14340
14341 /* GOT16 relocations. Like an ADDR16 using the symbol's
14342 address in the GOT as relocation value instead of the
14343 symbol's value itself. Also, create a GOT entry for the
14344 symbol and put the symbol value there. */
14345 case R_PPC64_GOT_TLSGD16:
14346 case R_PPC64_GOT_TLSGD16_LO:
14347 case R_PPC64_GOT_TLSGD16_HI:
14348 case R_PPC64_GOT_TLSGD16_HA:
14349 tls_type = TLS_TLS | TLS_GD;
14350 goto dogot;
14351
14352 case R_PPC64_GOT_TLSLD16:
14353 case R_PPC64_GOT_TLSLD16_LO:
14354 case R_PPC64_GOT_TLSLD16_HI:
14355 case R_PPC64_GOT_TLSLD16_HA:
14356 tls_type = TLS_TLS | TLS_LD;
14357 goto dogot;
14358
14359 case R_PPC64_GOT_TPREL16_DS:
14360 case R_PPC64_GOT_TPREL16_LO_DS:
14361 case R_PPC64_GOT_TPREL16_HI:
14362 case R_PPC64_GOT_TPREL16_HA:
14363 tls_type = TLS_TLS | TLS_TPREL;
14364 goto dogot;
14365
14366 case R_PPC64_GOT_DTPREL16_DS:
14367 case R_PPC64_GOT_DTPREL16_LO_DS:
14368 case R_PPC64_GOT_DTPREL16_HI:
14369 case R_PPC64_GOT_DTPREL16_HA:
14370 tls_type = TLS_TLS | TLS_DTPREL;
14371 goto dogot;
14372
14373 case R_PPC64_GOT16:
14374 case R_PPC64_GOT16_LO:
14375 case R_PPC64_GOT16_HI:
14376 case R_PPC64_GOT16_HA:
14377 case R_PPC64_GOT16_DS:
14378 case R_PPC64_GOT16_LO_DS:
14379 dogot:
14380 {
14381 /* Relocation is to the entry for this symbol in the global
14382 offset table. */
14383 asection *got;
14384 bfd_vma *offp;
14385 bfd_vma off;
14386 unsigned long indx = 0;
14387 struct got_entry *ent;
14388
14389 if (tls_type == (TLS_TLS | TLS_LD)
14390 && (h == NULL
14391 || !h->elf.def_dynamic))
14392 ent = ppc64_tlsld_got (input_bfd);
14393 else
14394 {
14395
14396 if (h != NULL)
14397 {
14398 bfd_boolean dyn = htab->elf.dynamic_sections_created;
14399 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, bfd_link_pic (info),
14400 &h->elf)
14401 || (bfd_link_pic (info)
14402 && SYMBOL_REFERENCES_LOCAL (info, &h->elf)))
14403 /* This is actually a static link, or it is a
14404 -Bsymbolic link and the symbol is defined
14405 locally, or the symbol was forced to be local
14406 because of a version file. */
14407 ;
14408 else
14409 {
14410 BFD_ASSERT (h->elf.dynindx != -1);
14411 indx = h->elf.dynindx;
14412 unresolved_reloc = FALSE;
14413 }
14414 ent = h->elf.got.glist;
14415 }
14416 else
14417 {
14418 if (local_got_ents == NULL)
14419 abort ();
14420 ent = local_got_ents[r_symndx];
14421 }
14422
14423 for (; ent != NULL; ent = ent->next)
14424 if (ent->addend == orig_rel.r_addend
14425 && ent->owner == input_bfd
14426 && ent->tls_type == tls_type)
14427 break;
14428 }
14429
14430 if (ent == NULL)
14431 abort ();
14432 if (ent->is_indirect)
14433 ent = ent->got.ent;
14434 offp = &ent->got.offset;
14435 got = ppc64_elf_tdata (ent->owner)->got;
14436 if (got == NULL)
14437 abort ();
14438
14439 /* The offset must always be a multiple of 8. We use the
14440 least significant bit to record whether we have already
14441 processed this entry. */
14442 off = *offp;
14443 if ((off & 1) != 0)
14444 off &= ~1;
14445 else
14446 {
14447 /* Generate relocs for the dynamic linker, except in
14448 the case of TLSLD where we'll use one entry per
14449 module. */
14450 asection *relgot;
14451 bfd_boolean ifunc;
14452
14453 *offp = off | 1;
14454 relgot = NULL;
14455 ifunc = (h != NULL
14456 ? h->elf.type == STT_GNU_IFUNC
14457 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC);
14458 if (ifunc)
14459 relgot = htab->elf.irelplt;
14460 else if ((bfd_link_pic (info) || indx != 0)
14461 && (h == NULL
14462 || (tls_type == (TLS_TLS | TLS_LD)
14463 && !h->elf.def_dynamic)
14464 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
14465 || h->elf.root.type != bfd_link_hash_undefweak))
14466 relgot = ppc64_elf_tdata (ent->owner)->relgot;
14467 if (relgot != NULL)
14468 {
14469 outrel.r_offset = (got->output_section->vma
14470 + got->output_offset
14471 + off);
14472 outrel.r_addend = addend;
14473 if (tls_type & (TLS_LD | TLS_GD))
14474 {
14475 outrel.r_addend = 0;
14476 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
14477 if (tls_type == (TLS_TLS | TLS_GD))
14478 {
14479 loc = relgot->contents;
14480 loc += (relgot->reloc_count++
14481 * sizeof (Elf64_External_Rela));
14482 bfd_elf64_swap_reloca_out (output_bfd,
14483 &outrel, loc);
14484 outrel.r_offset += 8;
14485 outrel.r_addend = addend;
14486 outrel.r_info
14487 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
14488 }
14489 }
14490 else if (tls_type == (TLS_TLS | TLS_DTPREL))
14491 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
14492 else if (tls_type == (TLS_TLS | TLS_TPREL))
14493 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
14494 else if (indx != 0)
14495 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
14496 else
14497 {
14498 if (ifunc)
14499 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
14500 else
14501 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
14502
14503 /* Write the .got section contents for the sake
14504 of prelink. */
14505 loc = got->contents + off;
14506 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
14507 loc);
14508 }
14509
14510 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
14511 {
14512 outrel.r_addend += relocation;
14513 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
14514 {
14515 if (htab->elf.tls_sec == NULL)
14516 outrel.r_addend = 0;
14517 else
14518 outrel.r_addend -= htab->elf.tls_sec->vma;
14519 }
14520 }
14521 loc = relgot->contents;
14522 loc += (relgot->reloc_count++
14523 * sizeof (Elf64_External_Rela));
14524 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
14525 }
14526
14527 /* Init the .got section contents here if we're not
14528 emitting a reloc. */
14529 else
14530 {
14531 relocation += addend;
14532 if (tls_type == (TLS_TLS | TLS_LD))
14533 relocation = 1;
14534 else if (tls_type != 0)
14535 {
14536 if (htab->elf.tls_sec == NULL)
14537 relocation = 0;
14538 else
14539 {
14540 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
14541 if (tls_type == (TLS_TLS | TLS_TPREL))
14542 relocation += DTP_OFFSET - TP_OFFSET;
14543 }
14544
14545 if (tls_type == (TLS_TLS | TLS_GD))
14546 {
14547 bfd_put_64 (output_bfd, relocation,
14548 got->contents + off + 8);
14549 relocation = 1;
14550 }
14551 }
14552
14553 bfd_put_64 (output_bfd, relocation,
14554 got->contents + off);
14555 }
14556 }
14557
14558 if (off >= (bfd_vma) -2)
14559 abort ();
14560
14561 relocation = got->output_section->vma + got->output_offset + off;
14562 addend = -(TOCstart + htab->sec_info[input_section->id].toc_off);
14563 }
14564 break;
14565
14566 case R_PPC64_PLT16_HA:
14567 case R_PPC64_PLT16_HI:
14568 case R_PPC64_PLT16_LO:
14569 case R_PPC64_PLT32:
14570 case R_PPC64_PLT64:
14571 /* Relocation is to the entry for this symbol in the
14572 procedure linkage table. */
14573 {
14574 struct plt_entry **plt_list = NULL;
14575 if (h != NULL)
14576 plt_list = &h->elf.plt.plist;
14577 else if (local_got_ents != NULL)
14578 {
14579 struct plt_entry **local_plt = (struct plt_entry **)
14580 (local_got_ents + symtab_hdr->sh_info);
14581 unsigned char *local_got_tls_masks = (unsigned char *)
14582 (local_plt + symtab_hdr->sh_info);
14583 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
14584 plt_list = local_plt + r_symndx;
14585 }
14586 if (plt_list)
14587 {
14588 struct plt_entry *ent;
14589
14590 for (ent = *plt_list; ent != NULL; ent = ent->next)
14591 if (ent->plt.offset != (bfd_vma) -1
14592 && ent->addend == orig_rel.r_addend)
14593 {
14594 asection *plt;
14595
14596 plt = htab->elf.splt;
14597 if (!htab->elf.dynamic_sections_created
14598 || h == NULL
14599 || h->elf.dynindx == -1)
14600 plt = htab->elf.iplt;
14601 relocation = (plt->output_section->vma
14602 + plt->output_offset
14603 + ent->plt.offset);
14604 addend = 0;
14605 unresolved_reloc = FALSE;
14606 break;
14607 }
14608 }
14609 }
14610 break;
14611
14612 case R_PPC64_TOC:
14613 /* Relocation value is TOC base. */
14614 relocation = TOCstart;
14615 if (r_symndx == STN_UNDEF)
14616 relocation += htab->sec_info[input_section->id].toc_off;
14617 else if (unresolved_reloc)
14618 ;
14619 else if (sec != NULL && sec->id < htab->sec_info_arr_size)
14620 relocation += htab->sec_info[sec->id].toc_off;
14621 else
14622 unresolved_reloc = TRUE;
14623 goto dodyn;
14624
14625 /* TOC16 relocs. We want the offset relative to the TOC base,
14626 which is the address of the start of the TOC plus 0x8000.
14627 The TOC consists of sections .got, .toc, .tocbss, and .plt,
14628 in this order. */
14629 case R_PPC64_TOC16:
14630 case R_PPC64_TOC16_LO:
14631 case R_PPC64_TOC16_HI:
14632 case R_PPC64_TOC16_DS:
14633 case R_PPC64_TOC16_LO_DS:
14634 case R_PPC64_TOC16_HA:
14635 addend -= TOCstart + htab->sec_info[input_section->id].toc_off;
14636 break;
14637
14638 /* Relocate against the beginning of the section. */
14639 case R_PPC64_SECTOFF:
14640 case R_PPC64_SECTOFF_LO:
14641 case R_PPC64_SECTOFF_HI:
14642 case R_PPC64_SECTOFF_DS:
14643 case R_PPC64_SECTOFF_LO_DS:
14644 case R_PPC64_SECTOFF_HA:
14645 if (sec != NULL)
14646 addend -= sec->output_section->vma;
14647 break;
14648
14649 case R_PPC64_REL16:
14650 case R_PPC64_REL16_LO:
14651 case R_PPC64_REL16_HI:
14652 case R_PPC64_REL16_HA:
14653 case R_PPC64_REL16DX_HA:
14654 break;
14655
14656 case R_PPC64_REL14:
14657 case R_PPC64_REL14_BRNTAKEN:
14658 case R_PPC64_REL14_BRTAKEN:
14659 case R_PPC64_REL24:
14660 break;
14661
14662 case R_PPC64_TPREL16:
14663 case R_PPC64_TPREL16_LO:
14664 case R_PPC64_TPREL16_HI:
14665 case R_PPC64_TPREL16_HA:
14666 case R_PPC64_TPREL16_DS:
14667 case R_PPC64_TPREL16_LO_DS:
14668 case R_PPC64_TPREL16_HIGH:
14669 case R_PPC64_TPREL16_HIGHA:
14670 case R_PPC64_TPREL16_HIGHER:
14671 case R_PPC64_TPREL16_HIGHERA:
14672 case R_PPC64_TPREL16_HIGHEST:
14673 case R_PPC64_TPREL16_HIGHESTA:
14674 if (h != NULL
14675 && h->elf.root.type == bfd_link_hash_undefweak
14676 && h->elf.dynindx == -1)
14677 {
14678 /* Make this relocation against an undefined weak symbol
14679 resolve to zero. This is really just a tweak, since
14680 code using weak externs ought to check that they are
14681 defined before using them. */
14682 bfd_byte *p = contents + rel->r_offset - d_offset;
14683
14684 insn = bfd_get_32 (output_bfd, p);
14685 insn = _bfd_elf_ppc_at_tprel_transform (insn, 13);
14686 if (insn != 0)
14687 bfd_put_32 (output_bfd, insn, p);
14688 break;
14689 }
14690 if (htab->elf.tls_sec != NULL)
14691 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
14692 if (bfd_link_pic (info))
14693 /* The TPREL16 relocs shouldn't really be used in shared
14694 libs as they will result in DT_TEXTREL being set, but
14695 support them anyway. */
14696 goto dodyn;
14697 break;
14698
14699 case R_PPC64_DTPREL16:
14700 case R_PPC64_DTPREL16_LO:
14701 case R_PPC64_DTPREL16_HI:
14702 case R_PPC64_DTPREL16_HA:
14703 case R_PPC64_DTPREL16_DS:
14704 case R_PPC64_DTPREL16_LO_DS:
14705 case R_PPC64_DTPREL16_HIGH:
14706 case R_PPC64_DTPREL16_HIGHA:
14707 case R_PPC64_DTPREL16_HIGHER:
14708 case R_PPC64_DTPREL16_HIGHERA:
14709 case R_PPC64_DTPREL16_HIGHEST:
14710 case R_PPC64_DTPREL16_HIGHESTA:
14711 if (htab->elf.tls_sec != NULL)
14712 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
14713 break;
14714
14715 case R_PPC64_ADDR64_LOCAL:
14716 addend += PPC64_LOCAL_ENTRY_OFFSET (h != NULL
14717 ? h->elf.other
14718 : sym->st_other);
14719 break;
14720
14721 case R_PPC64_DTPMOD64:
14722 relocation = 1;
14723 addend = 0;
14724 goto dodyn;
14725
14726 case R_PPC64_TPREL64:
14727 if (htab->elf.tls_sec != NULL)
14728 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
14729 goto dodyn;
14730
14731 case R_PPC64_DTPREL64:
14732 if (htab->elf.tls_sec != NULL)
14733 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
14734 /* Fall through. */
14735
14736 /* Relocations that may need to be propagated if this is a
14737 dynamic object. */
14738 case R_PPC64_REL30:
14739 case R_PPC64_REL32:
14740 case R_PPC64_REL64:
14741 case R_PPC64_ADDR14:
14742 case R_PPC64_ADDR14_BRNTAKEN:
14743 case R_PPC64_ADDR14_BRTAKEN:
14744 case R_PPC64_ADDR16:
14745 case R_PPC64_ADDR16_DS:
14746 case R_PPC64_ADDR16_HA:
14747 case R_PPC64_ADDR16_HI:
14748 case R_PPC64_ADDR16_HIGH:
14749 case R_PPC64_ADDR16_HIGHA:
14750 case R_PPC64_ADDR16_HIGHER:
14751 case R_PPC64_ADDR16_HIGHERA:
14752 case R_PPC64_ADDR16_HIGHEST:
14753 case R_PPC64_ADDR16_HIGHESTA:
14754 case R_PPC64_ADDR16_LO:
14755 case R_PPC64_ADDR16_LO_DS:
14756 case R_PPC64_ADDR24:
14757 case R_PPC64_ADDR32:
14758 case R_PPC64_ADDR64:
14759 case R_PPC64_UADDR16:
14760 case R_PPC64_UADDR32:
14761 case R_PPC64_UADDR64:
14762 dodyn:
14763 if ((input_section->flags & SEC_ALLOC) == 0)
14764 break;
14765
14766 if (NO_OPD_RELOCS && is_opd)
14767 break;
14768
14769 if (bfd_link_pic (info)
14770 ? ((h != NULL && pc_dynrelocs (h))
14771 || must_be_dyn_reloc (info, r_type))
14772 : (h != NULL
14773 ? h->dyn_relocs != NULL
14774 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
14775 {
14776 bfd_boolean skip, relocate;
14777 asection *sreloc;
14778 bfd_vma out_off;
14779
14780 /* When generating a dynamic object, these relocations
14781 are copied into the output file to be resolved at run
14782 time. */
14783
14784 skip = FALSE;
14785 relocate = FALSE;
14786
14787 out_off = _bfd_elf_section_offset (output_bfd, info,
14788 input_section, rel->r_offset);
14789 if (out_off == (bfd_vma) -1)
14790 skip = TRUE;
14791 else if (out_off == (bfd_vma) -2)
14792 skip = TRUE, relocate = TRUE;
14793 out_off += (input_section->output_section->vma
14794 + input_section->output_offset);
14795 outrel.r_offset = out_off;
14796 outrel.r_addend = rel->r_addend;
14797
14798 /* Optimize unaligned reloc use. */
14799 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
14800 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
14801 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
14802 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
14803 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
14804 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
14805 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
14806 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
14807 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
14808
14809 if (skip)
14810 memset (&outrel, 0, sizeof outrel);
14811 else if (!SYMBOL_REFERENCES_LOCAL (info, &h->elf)
14812 && !is_opd
14813 && r_type != R_PPC64_TOC)
14814 {
14815 BFD_ASSERT (h->elf.dynindx != -1);
14816 outrel.r_info = ELF64_R_INFO (h->elf.dynindx, r_type);
14817 }
14818 else
14819 {
14820 /* This symbol is local, or marked to become local,
14821 or this is an opd section reloc which must point
14822 at a local function. */
14823 outrel.r_addend += relocation;
14824 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
14825 {
14826 if (is_opd && h != NULL)
14827 {
14828 /* Lie about opd entries. This case occurs
14829 when building shared libraries and we
14830 reference a function in another shared
14831 lib. The same thing happens for a weak
14832 definition in an application that's
14833 overridden by a strong definition in a
14834 shared lib. (I believe this is a generic
14835 bug in binutils handling of weak syms.)
14836 In these cases we won't use the opd
14837 entry in this lib. */
14838 unresolved_reloc = FALSE;
14839 }
14840 if (!is_opd
14841 && r_type == R_PPC64_ADDR64
14842 && (h != NULL
14843 ? h->elf.type == STT_GNU_IFUNC
14844 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
14845 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
14846 else
14847 {
14848 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
14849
14850 /* We need to relocate .opd contents for ld.so.
14851 Prelink also wants simple and consistent rules
14852 for relocs. This make all RELATIVE relocs have
14853 *r_offset equal to r_addend. */
14854 relocate = TRUE;
14855 }
14856 }
14857 else
14858 {
14859 long indx = 0;
14860
14861 if (h != NULL
14862 ? h->elf.type == STT_GNU_IFUNC
14863 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
14864 {
14865 info->callbacks->einfo
14866 (_("%P: %H: %s for indirect "
14867 "function `%T' unsupported\n"),
14868 input_bfd, input_section, rel->r_offset,
14869 ppc64_elf_howto_table[r_type]->name,
14870 sym_name);
14871 ret = FALSE;
14872 }
14873 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
14874 ;
14875 else if (sec == NULL || sec->owner == NULL)
14876 {
14877 bfd_set_error (bfd_error_bad_value);
14878 return FALSE;
14879 }
14880 else
14881 {
14882 asection *osec;
14883
14884 osec = sec->output_section;
14885 indx = elf_section_data (osec)->dynindx;
14886
14887 if (indx == 0)
14888 {
14889 if ((osec->flags & SEC_READONLY) == 0
14890 && htab->elf.data_index_section != NULL)
14891 osec = htab->elf.data_index_section;
14892 else
14893 osec = htab->elf.text_index_section;
14894 indx = elf_section_data (osec)->dynindx;
14895 }
14896 BFD_ASSERT (indx != 0);
14897
14898 /* We are turning this relocation into one
14899 against a section symbol, so subtract out
14900 the output section's address but not the
14901 offset of the input section in the output
14902 section. */
14903 outrel.r_addend -= osec->vma;
14904 }
14905
14906 outrel.r_info = ELF64_R_INFO (indx, r_type);
14907 }
14908 }
14909
14910 sreloc = elf_section_data (input_section)->sreloc;
14911 if (h != NULL
14912 ? h->elf.type == STT_GNU_IFUNC
14913 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
14914 sreloc = htab->elf.irelplt;
14915 if (sreloc == NULL)
14916 abort ();
14917
14918 if (sreloc->reloc_count * sizeof (Elf64_External_Rela)
14919 >= sreloc->size)
14920 abort ();
14921 loc = sreloc->contents;
14922 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
14923 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
14924
14925 /* If this reloc is against an external symbol, it will
14926 be computed at runtime, so there's no need to do
14927 anything now. However, for the sake of prelink ensure
14928 that the section contents are a known value. */
14929 if (! relocate)
14930 {
14931 unresolved_reloc = FALSE;
14932 /* The value chosen here is quite arbitrary as ld.so
14933 ignores section contents except for the special
14934 case of .opd where the contents might be accessed
14935 before relocation. Choose zero, as that won't
14936 cause reloc overflow. */
14937 relocation = 0;
14938 addend = 0;
14939 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
14940 to improve backward compatibility with older
14941 versions of ld. */
14942 if (r_type == R_PPC64_ADDR64)
14943 addend = outrel.r_addend;
14944 /* Adjust pc_relative relocs to have zero in *r_offset. */
14945 else if (ppc64_elf_howto_table[r_type]->pc_relative)
14946 addend = (input_section->output_section->vma
14947 + input_section->output_offset
14948 + rel->r_offset);
14949 }
14950 }
14951 break;
14952
14953 case R_PPC64_COPY:
14954 case R_PPC64_GLOB_DAT:
14955 case R_PPC64_JMP_SLOT:
14956 case R_PPC64_JMP_IREL:
14957 case R_PPC64_RELATIVE:
14958 /* We shouldn't ever see these dynamic relocs in relocatable
14959 files. */
14960 /* Fall through. */
14961
14962 case R_PPC64_PLTGOT16:
14963 case R_PPC64_PLTGOT16_DS:
14964 case R_PPC64_PLTGOT16_HA:
14965 case R_PPC64_PLTGOT16_HI:
14966 case R_PPC64_PLTGOT16_LO:
14967 case R_PPC64_PLTGOT16_LO_DS:
14968 case R_PPC64_PLTREL32:
14969 case R_PPC64_PLTREL64:
14970 /* These ones haven't been implemented yet. */
14971
14972 info->callbacks->einfo
14973 (_("%P: %B: %s is not supported for `%T'\n"),
14974 input_bfd,
14975 ppc64_elf_howto_table[r_type]->name, sym_name);
14976
14977 bfd_set_error (bfd_error_invalid_operation);
14978 ret = FALSE;
14979 goto copy_reloc;
14980 }
14981
14982 /* Multi-instruction sequences that access the TOC can be
14983 optimized, eg. addis ra,r2,0; addi rb,ra,x;
14984 to nop; addi rb,r2,x; */
14985 switch (r_type)
14986 {
14987 default:
14988 break;
14989
14990 case R_PPC64_GOT_TLSLD16_HI:
14991 case R_PPC64_GOT_TLSGD16_HI:
14992 case R_PPC64_GOT_TPREL16_HI:
14993 case R_PPC64_GOT_DTPREL16_HI:
14994 case R_PPC64_GOT16_HI:
14995 case R_PPC64_TOC16_HI:
14996 /* These relocs would only be useful if building up an
14997 offset to later add to r2, perhaps in an indexed
14998 addressing mode instruction. Don't try to optimize.
14999 Unfortunately, the possibility of someone building up an
15000 offset like this or even with the HA relocs, means that
15001 we need to check the high insn when optimizing the low
15002 insn. */
15003 break;
15004
15005 case R_PPC64_GOT_TLSLD16_HA:
15006 case R_PPC64_GOT_TLSGD16_HA:
15007 case R_PPC64_GOT_TPREL16_HA:
15008 case R_PPC64_GOT_DTPREL16_HA:
15009 case R_PPC64_GOT16_HA:
15010 case R_PPC64_TOC16_HA:
15011 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
15012 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
15013 {
15014 bfd_byte *p = contents + (rel->r_offset & ~3);
15015 bfd_put_32 (input_bfd, NOP, p);
15016 }
15017 break;
15018
15019 case R_PPC64_GOT_TLSLD16_LO:
15020 case R_PPC64_GOT_TLSGD16_LO:
15021 case R_PPC64_GOT_TPREL16_LO_DS:
15022 case R_PPC64_GOT_DTPREL16_LO_DS:
15023 case R_PPC64_GOT16_LO:
15024 case R_PPC64_GOT16_LO_DS:
15025 case R_PPC64_TOC16_LO:
15026 case R_PPC64_TOC16_LO_DS:
15027 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
15028 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
15029 {
15030 bfd_byte *p = contents + (rel->r_offset & ~3);
15031 insn = bfd_get_32 (input_bfd, p);
15032 if ((insn & (0x3f << 26)) == 12u << 26 /* addic */)
15033 {
15034 /* Transform addic to addi when we change reg. */
15035 insn &= ~((0x3f << 26) | (0x1f << 16));
15036 insn |= (14u << 26) | (2 << 16);
15037 }
15038 else
15039 {
15040 insn &= ~(0x1f << 16);
15041 insn |= 2 << 16;
15042 }
15043 bfd_put_32 (input_bfd, insn, p);
15044 }
15045 break;
15046 }
15047
15048 /* Do any further special processing. */
15049 howto = ppc64_elf_howto_table[(int) r_type];
15050 switch (r_type)
15051 {
15052 default:
15053 break;
15054
15055 case R_PPC64_REL16_HA:
15056 case R_PPC64_REL16DX_HA:
15057 case R_PPC64_ADDR16_HA:
15058 case R_PPC64_ADDR16_HIGHA:
15059 case R_PPC64_ADDR16_HIGHERA:
15060 case R_PPC64_ADDR16_HIGHESTA:
15061 case R_PPC64_TOC16_HA:
15062 case R_PPC64_SECTOFF_HA:
15063 case R_PPC64_TPREL16_HA:
15064 case R_PPC64_TPREL16_HIGHA:
15065 case R_PPC64_TPREL16_HIGHERA:
15066 case R_PPC64_TPREL16_HIGHESTA:
15067 case R_PPC64_DTPREL16_HA:
15068 case R_PPC64_DTPREL16_HIGHA:
15069 case R_PPC64_DTPREL16_HIGHERA:
15070 case R_PPC64_DTPREL16_HIGHESTA:
15071 /* It's just possible that this symbol is a weak symbol
15072 that's not actually defined anywhere. In that case,
15073 'sec' would be NULL, and we should leave the symbol
15074 alone (it will be set to zero elsewhere in the link). */
15075 if (sec == NULL)
15076 break;
15077 /* Fall through. */
15078
15079 case R_PPC64_GOT16_HA:
15080 case R_PPC64_PLTGOT16_HA:
15081 case R_PPC64_PLT16_HA:
15082 case R_PPC64_GOT_TLSGD16_HA:
15083 case R_PPC64_GOT_TLSLD16_HA:
15084 case R_PPC64_GOT_TPREL16_HA:
15085 case R_PPC64_GOT_DTPREL16_HA:
15086 /* Add 0x10000 if sign bit in 0:15 is set.
15087 Bits 0:15 are not used. */
15088 addend += 0x8000;
15089 break;
15090
15091 case R_PPC64_ADDR16_DS:
15092 case R_PPC64_ADDR16_LO_DS:
15093 case R_PPC64_GOT16_DS:
15094 case R_PPC64_GOT16_LO_DS:
15095 case R_PPC64_PLT16_LO_DS:
15096 case R_PPC64_SECTOFF_DS:
15097 case R_PPC64_SECTOFF_LO_DS:
15098 case R_PPC64_TOC16_DS:
15099 case R_PPC64_TOC16_LO_DS:
15100 case R_PPC64_PLTGOT16_DS:
15101 case R_PPC64_PLTGOT16_LO_DS:
15102 case R_PPC64_GOT_TPREL16_DS:
15103 case R_PPC64_GOT_TPREL16_LO_DS:
15104 case R_PPC64_GOT_DTPREL16_DS:
15105 case R_PPC64_GOT_DTPREL16_LO_DS:
15106 case R_PPC64_TPREL16_DS:
15107 case R_PPC64_TPREL16_LO_DS:
15108 case R_PPC64_DTPREL16_DS:
15109 case R_PPC64_DTPREL16_LO_DS:
15110 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
15111 mask = 3;
15112 /* If this reloc is against an lq, lxv, or stxv insn, then
15113 the value must be a multiple of 16. This is somewhat of
15114 a hack, but the "correct" way to do this by defining _DQ
15115 forms of all the _DS relocs bloats all reloc switches in
15116 this file. It doesn't make much sense to use these
15117 relocs in data, so testing the insn should be safe. */
15118 if ((insn & (0x3f << 26)) == (56u << 26)
15119 || ((insn & (0x3f << 26)) == (61u << 26) && (insn & 3) == 1))
15120 mask = 15;
15121 relocation += addend;
15122 addend = insn & (mask ^ 3);
15123 if ((relocation & mask) != 0)
15124 {
15125 relocation ^= relocation & mask;
15126 info->callbacks->einfo
15127 (_("%P: %H: error: %s not a multiple of %u\n"),
15128 input_bfd, input_section, rel->r_offset,
15129 howto->name,
15130 mask + 1);
15131 bfd_set_error (bfd_error_bad_value);
15132 ret = FALSE;
15133 goto copy_reloc;
15134 }
15135 break;
15136 }
15137
15138 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
15139 because such sections are not SEC_ALLOC and thus ld.so will
15140 not process them. */
15141 if (unresolved_reloc
15142 && !((input_section->flags & SEC_DEBUGGING) != 0
15143 && h->elf.def_dynamic)
15144 && _bfd_elf_section_offset (output_bfd, info, input_section,
15145 rel->r_offset) != (bfd_vma) -1)
15146 {
15147 info->callbacks->einfo
15148 (_("%P: %H: unresolvable %s against `%T'\n"),
15149 input_bfd, input_section, rel->r_offset,
15150 howto->name,
15151 h->elf.root.root.string);
15152 ret = FALSE;
15153 }
15154
15155 /* 16-bit fields in insns mostly have signed values, but a
15156 few insns have 16-bit unsigned values. Really, we should
15157 have different reloc types. */
15158 if (howto->complain_on_overflow != complain_overflow_dont
15159 && howto->dst_mask == 0xffff
15160 && (input_section->flags & SEC_CODE) != 0)
15161 {
15162 enum complain_overflow complain = complain_overflow_signed;
15163
15164 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
15165 if ((insn & (0x3f << 26)) == 10u << 26 /* cmpli */)
15166 complain = complain_overflow_bitfield;
15167 else if (howto->rightshift == 0
15168 ? ((insn & (0x3f << 26)) == 28u << 26 /* andi */
15169 || (insn & (0x3f << 26)) == 24u << 26 /* ori */
15170 || (insn & (0x3f << 26)) == 26u << 26 /* xori */)
15171 : ((insn & (0x3f << 26)) == 29u << 26 /* andis */
15172 || (insn & (0x3f << 26)) == 25u << 26 /* oris */
15173 || (insn & (0x3f << 26)) == 27u << 26 /* xoris */))
15174 complain = complain_overflow_unsigned;
15175 if (howto->complain_on_overflow != complain)
15176 {
15177 alt_howto = *howto;
15178 alt_howto.complain_on_overflow = complain;
15179 howto = &alt_howto;
15180 }
15181 }
15182
15183 if (r_type == R_PPC64_REL16DX_HA)
15184 {
15185 /* Split field reloc isn't handled by _bfd_final_link_relocate. */
15186 if (rel->r_offset + 4 > input_section->size)
15187 r = bfd_reloc_outofrange;
15188 else
15189 {
15190 relocation += addend;
15191 relocation -= (rel->r_offset
15192 + input_section->output_offset
15193 + input_section->output_section->vma);
15194 relocation = (bfd_signed_vma) relocation >> 16;
15195 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
15196 insn &= ~0x1fffc1;
15197 insn |= (relocation & 0xffc1) | ((relocation & 0x3e) << 15);
15198 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
15199 r = bfd_reloc_ok;
15200 if (relocation + 0x8000 > 0xffff)
15201 r = bfd_reloc_overflow;
15202 }
15203 }
15204 else
15205 r = _bfd_final_link_relocate (howto, input_bfd, input_section, contents,
15206 rel->r_offset, relocation, addend);
15207
15208 if (r != bfd_reloc_ok)
15209 {
15210 char *more_info = NULL;
15211 const char *reloc_name = howto->name;
15212
15213 if (reloc_dest != DEST_NORMAL)
15214 {
15215 more_info = bfd_malloc (strlen (reloc_name) + 8);
15216 if (more_info != NULL)
15217 {
15218 strcpy (more_info, reloc_name);
15219 strcat (more_info, (reloc_dest == DEST_OPD
15220 ? " (OPD)" : " (stub)"));
15221 reloc_name = more_info;
15222 }
15223 }
15224
15225 if (r == bfd_reloc_overflow)
15226 {
15227 /* On code like "if (foo) foo();" don't report overflow
15228 on a branch to zero when foo is undefined. */
15229 if (!warned
15230 && (reloc_dest == DEST_STUB
15231 || !(h != NULL
15232 && (h->elf.root.type == bfd_link_hash_undefweak
15233 || h->elf.root.type == bfd_link_hash_undefined)
15234 && is_branch_reloc (r_type))))
15235 info->callbacks->reloc_overflow (info, &h->elf.root,
15236 sym_name, reloc_name,
15237 orig_rel.r_addend,
15238 input_bfd, input_section,
15239 rel->r_offset);
15240 }
15241 else
15242 {
15243 info->callbacks->einfo
15244 (_("%P: %H: %s against `%T': error %d\n"),
15245 input_bfd, input_section, rel->r_offset,
15246 reloc_name, sym_name, (int) r);
15247 ret = FALSE;
15248 }
15249 if (more_info != NULL)
15250 free (more_info);
15251 }
15252 copy_reloc:
15253 if (wrel != rel)
15254 *wrel = *rel;
15255 }
15256
15257 if (wrel != rel)
15258 {
15259 Elf_Internal_Shdr *rel_hdr;
15260 size_t deleted = rel - wrel;
15261
15262 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
15263 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
15264 if (rel_hdr->sh_size == 0)
15265 {
15266 /* It is too late to remove an empty reloc section. Leave
15267 one NONE reloc.
15268 ??? What is wrong with an empty section??? */
15269 rel_hdr->sh_size = rel_hdr->sh_entsize;
15270 deleted -= 1;
15271 }
15272 rel_hdr = _bfd_elf_single_rel_hdr (input_section);
15273 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
15274 input_section->reloc_count -= deleted;
15275 }
15276
15277 /* If we're emitting relocations, then shortly after this function
15278 returns, reloc offsets and addends for this section will be
15279 adjusted. Worse, reloc symbol indices will be for the output
15280 file rather than the input. Save a copy of the relocs for
15281 opd_entry_value. */
15282 if (is_opd && (info->emitrelocations || bfd_link_relocatable (info)))
15283 {
15284 bfd_size_type amt;
15285 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
15286 rel = bfd_alloc (input_bfd, amt);
15287 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd.relocs == NULL);
15288 ppc64_elf_tdata (input_bfd)->opd.relocs = rel;
15289 if (rel == NULL)
15290 return FALSE;
15291 memcpy (rel, relocs, amt);
15292 }
15293 return ret;
15294 }
15295
15296 /* Adjust the value of any local symbols in opd sections. */
15297
15298 static int
15299 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
15300 const char *name ATTRIBUTE_UNUSED,
15301 Elf_Internal_Sym *elfsym,
15302 asection *input_sec,
15303 struct elf_link_hash_entry *h)
15304 {
15305 struct _opd_sec_data *opd;
15306 long adjust;
15307 bfd_vma value;
15308
15309 if (h != NULL)
15310 return 1;
15311
15312 opd = get_opd_info (input_sec);
15313 if (opd == NULL || opd->adjust == NULL)
15314 return 1;
15315
15316 value = elfsym->st_value - input_sec->output_offset;
15317 if (!bfd_link_relocatable (info))
15318 value -= input_sec->output_section->vma;
15319
15320 adjust = opd->adjust[OPD_NDX (value)];
15321 if (adjust == -1)
15322 return 2;
15323
15324 elfsym->st_value += adjust;
15325 return 1;
15326 }
15327
15328 /* Finish up dynamic symbol handling. We set the contents of various
15329 dynamic sections here. */
15330
15331 static bfd_boolean
15332 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
15333 struct bfd_link_info *info,
15334 struct elf_link_hash_entry *h,
15335 Elf_Internal_Sym *sym ATTRIBUTE_UNUSED)
15336 {
15337 struct ppc_link_hash_table *htab;
15338 struct plt_entry *ent;
15339 Elf_Internal_Rela rela;
15340 bfd_byte *loc;
15341
15342 htab = ppc_hash_table (info);
15343 if (htab == NULL)
15344 return FALSE;
15345
15346 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
15347 if (ent->plt.offset != (bfd_vma) -1)
15348 {
15349 /* This symbol has an entry in the procedure linkage
15350 table. Set it up. */
15351 if (!htab->elf.dynamic_sections_created
15352 || h->dynindx == -1)
15353 {
15354 BFD_ASSERT (h->type == STT_GNU_IFUNC
15355 && h->def_regular
15356 && (h->root.type == bfd_link_hash_defined
15357 || h->root.type == bfd_link_hash_defweak));
15358 rela.r_offset = (htab->elf.iplt->output_section->vma
15359 + htab->elf.iplt->output_offset
15360 + ent->plt.offset);
15361 if (htab->opd_abi)
15362 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
15363 else
15364 rela.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
15365 rela.r_addend = (h->root.u.def.value
15366 + h->root.u.def.section->output_offset
15367 + h->root.u.def.section->output_section->vma
15368 + ent->addend);
15369 loc = (htab->elf.irelplt->contents
15370 + (htab->elf.irelplt->reloc_count++
15371 * sizeof (Elf64_External_Rela)));
15372 }
15373 else
15374 {
15375 rela.r_offset = (htab->elf.splt->output_section->vma
15376 + htab->elf.splt->output_offset
15377 + ent->plt.offset);
15378 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
15379 rela.r_addend = ent->addend;
15380 loc = (htab->elf.srelplt->contents
15381 + ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE (htab))
15382 / PLT_ENTRY_SIZE (htab) * sizeof (Elf64_External_Rela)));
15383 }
15384 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
15385
15386 if (!htab->opd_abi)
15387 {
15388 if (!h->def_regular)
15389 {
15390 /* Mark the symbol as undefined, rather than as
15391 defined in glink. Leave the value if there were
15392 any relocations where pointer equality matters
15393 (this is a clue for the dynamic linker, to make
15394 function pointer comparisons work between an
15395 application and shared library), otherwise set it
15396 to zero. */
15397 sym->st_shndx = SHN_UNDEF;
15398 if (!h->pointer_equality_needed)
15399 sym->st_value = 0;
15400 else if (!h->ref_regular_nonweak)
15401 {
15402 /* This breaks function pointer comparisons, but
15403 that is better than breaking tests for a NULL
15404 function pointer. */
15405 sym->st_value = 0;
15406 }
15407 }
15408 }
15409 }
15410
15411 if (h->needs_copy)
15412 {
15413 /* This symbol needs a copy reloc. Set it up. */
15414
15415 if (h->dynindx == -1
15416 || (h->root.type != bfd_link_hash_defined
15417 && h->root.type != bfd_link_hash_defweak)
15418 || htab->relbss == NULL)
15419 abort ();
15420
15421 rela.r_offset = (h->root.u.def.value
15422 + h->root.u.def.section->output_section->vma
15423 + h->root.u.def.section->output_offset);
15424 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
15425 rela.r_addend = 0;
15426 loc = htab->relbss->contents;
15427 loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela);
15428 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
15429 }
15430
15431 return TRUE;
15432 }
15433
15434 /* Used to decide how to sort relocs in an optimal manner for the
15435 dynamic linker, before writing them out. */
15436
15437 static enum elf_reloc_type_class
15438 ppc64_elf_reloc_type_class (const struct bfd_link_info *info,
15439 const asection *rel_sec,
15440 const Elf_Internal_Rela *rela)
15441 {
15442 enum elf_ppc64_reloc_type r_type;
15443 struct ppc_link_hash_table *htab = ppc_hash_table (info);
15444
15445 if (rel_sec == htab->elf.irelplt)
15446 return reloc_class_ifunc;
15447
15448 r_type = ELF64_R_TYPE (rela->r_info);
15449 switch (r_type)
15450 {
15451 case R_PPC64_RELATIVE:
15452 return reloc_class_relative;
15453 case R_PPC64_JMP_SLOT:
15454 return reloc_class_plt;
15455 case R_PPC64_COPY:
15456 return reloc_class_copy;
15457 default:
15458 return reloc_class_normal;
15459 }
15460 }
15461
15462 /* Finish up the dynamic sections. */
15463
15464 static bfd_boolean
15465 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
15466 struct bfd_link_info *info)
15467 {
15468 struct ppc_link_hash_table *htab;
15469 bfd *dynobj;
15470 asection *sdyn;
15471
15472 htab = ppc_hash_table (info);
15473 if (htab == NULL)
15474 return FALSE;
15475
15476 dynobj = htab->elf.dynobj;
15477 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
15478
15479 if (htab->elf.dynamic_sections_created)
15480 {
15481 Elf64_External_Dyn *dyncon, *dynconend;
15482
15483 if (sdyn == NULL || htab->elf.sgot == NULL)
15484 abort ();
15485
15486 dyncon = (Elf64_External_Dyn *) sdyn->contents;
15487 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
15488 for (; dyncon < dynconend; dyncon++)
15489 {
15490 Elf_Internal_Dyn dyn;
15491 asection *s;
15492
15493 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
15494
15495 switch (dyn.d_tag)
15496 {
15497 default:
15498 continue;
15499
15500 case DT_PPC64_GLINK:
15501 s = htab->glink;
15502 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15503 /* We stupidly defined DT_PPC64_GLINK to be the start
15504 of glink rather than the first entry point, which is
15505 what ld.so needs, and now have a bigger stub to
15506 support automatic multiple TOCs. */
15507 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 8 * 4;
15508 break;
15509
15510 case DT_PPC64_OPD:
15511 s = bfd_get_section_by_name (output_bfd, ".opd");
15512 if (s == NULL)
15513 continue;
15514 dyn.d_un.d_ptr = s->vma;
15515 break;
15516
15517 case DT_PPC64_OPT:
15518 if (htab->do_multi_toc && htab->multi_toc_needed)
15519 dyn.d_un.d_val |= PPC64_OPT_MULTI_TOC;
15520 break;
15521
15522 case DT_PPC64_OPDSZ:
15523 s = bfd_get_section_by_name (output_bfd, ".opd");
15524 if (s == NULL)
15525 continue;
15526 dyn.d_un.d_val = s->size;
15527 break;
15528
15529 case DT_PLTGOT:
15530 s = htab->elf.splt;
15531 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15532 break;
15533
15534 case DT_JMPREL:
15535 s = htab->elf.srelplt;
15536 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15537 break;
15538
15539 case DT_PLTRELSZ:
15540 dyn.d_un.d_val = htab->elf.srelplt->size;
15541 break;
15542
15543 case DT_RELASZ:
15544 /* Don't count procedure linkage table relocs in the
15545 overall reloc count. */
15546 s = htab->elf.srelplt;
15547 if (s == NULL)
15548 continue;
15549 dyn.d_un.d_val -= s->size;
15550 break;
15551
15552 case DT_RELA:
15553 /* We may not be using the standard ELF linker script.
15554 If .rela.plt is the first .rela section, we adjust
15555 DT_RELA to not include it. */
15556 s = htab->elf.srelplt;
15557 if (s == NULL)
15558 continue;
15559 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
15560 continue;
15561 dyn.d_un.d_ptr += s->size;
15562 break;
15563 }
15564
15565 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
15566 }
15567 }
15568
15569 if (htab->elf.sgot != NULL && htab->elf.sgot->size != 0)
15570 {
15571 /* Fill in the first entry in the global offset table.
15572 We use it to hold the link-time TOCbase. */
15573 bfd_put_64 (output_bfd,
15574 elf_gp (output_bfd) + TOC_BASE_OFF,
15575 htab->elf.sgot->contents);
15576
15577 /* Set .got entry size. */
15578 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 8;
15579 }
15580
15581 if (htab->elf.splt != NULL && htab->elf.splt->size != 0)
15582 {
15583 /* Set .plt entry size. */
15584 elf_section_data (htab->elf.splt->output_section)->this_hdr.sh_entsize
15585 = PLT_ENTRY_SIZE (htab);
15586 }
15587
15588 /* brlt is SEC_LINKER_CREATED, so we need to write out relocs for
15589 brlt ourselves if emitrelocations. */
15590 if (htab->brlt != NULL
15591 && htab->brlt->reloc_count != 0
15592 && !_bfd_elf_link_output_relocs (output_bfd,
15593 htab->brlt,
15594 elf_section_data (htab->brlt)->rela.hdr,
15595 elf_section_data (htab->brlt)->relocs,
15596 NULL))
15597 return FALSE;
15598
15599 if (htab->glink != NULL
15600 && htab->glink->reloc_count != 0
15601 && !_bfd_elf_link_output_relocs (output_bfd,
15602 htab->glink,
15603 elf_section_data (htab->glink)->rela.hdr,
15604 elf_section_data (htab->glink)->relocs,
15605 NULL))
15606 return FALSE;
15607
15608 if (htab->glink_eh_frame != NULL
15609 && htab->glink_eh_frame->size != 0)
15610 {
15611 bfd_vma val;
15612 bfd_byte *p;
15613 asection *stub_sec;
15614
15615 p = htab->glink_eh_frame->contents + sizeof (glink_eh_frame_cie);
15616 for (stub_sec = htab->params->stub_bfd->sections;
15617 stub_sec != NULL;
15618 stub_sec = stub_sec->next)
15619 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
15620 {
15621 /* FDE length. */
15622 p += 4;
15623 /* CIE pointer. */
15624 p += 4;
15625 /* Offset to stub section. */
15626 val = (stub_sec->output_section->vma
15627 + stub_sec->output_offset);
15628 val -= (htab->glink_eh_frame->output_section->vma
15629 + htab->glink_eh_frame->output_offset
15630 + (p - htab->glink_eh_frame->contents));
15631 if (val + 0x80000000 > 0xffffffff)
15632 {
15633 info->callbacks->einfo
15634 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
15635 stub_sec->name);
15636 return FALSE;
15637 }
15638 bfd_put_32 (dynobj, val, p);
15639 p += 4;
15640 /* stub section size. */
15641 p += 4;
15642 /* Augmentation. */
15643 p += 1;
15644 /* Pad. */
15645 p += 7;
15646 }
15647 if (htab->glink != NULL && htab->glink->size != 0)
15648 {
15649 /* FDE length. */
15650 p += 4;
15651 /* CIE pointer. */
15652 p += 4;
15653 /* Offset to .glink. */
15654 val = (htab->glink->output_section->vma
15655 + htab->glink->output_offset
15656 + 8);
15657 val -= (htab->glink_eh_frame->output_section->vma
15658 + htab->glink_eh_frame->output_offset
15659 + (p - htab->glink_eh_frame->contents));
15660 if (val + 0x80000000 > 0xffffffff)
15661 {
15662 info->callbacks->einfo
15663 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
15664 htab->glink->name);
15665 return FALSE;
15666 }
15667 bfd_put_32 (dynobj, val, p);
15668 p += 4;
15669 /* .glink size. */
15670 p += 4;
15671 /* Augmentation. */
15672 p += 1;
15673 /* Ops. */
15674 p += 7;
15675 }
15676
15677 if (htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME
15678 && !_bfd_elf_write_section_eh_frame (output_bfd, info,
15679 htab->glink_eh_frame,
15680 htab->glink_eh_frame->contents))
15681 return FALSE;
15682 }
15683
15684 /* We need to handle writing out multiple GOT sections ourselves,
15685 since we didn't add them to DYNOBJ. We know dynobj is the first
15686 bfd. */
15687 while ((dynobj = dynobj->link.next) != NULL)
15688 {
15689 asection *s;
15690
15691 if (!is_ppc64_elf (dynobj))
15692 continue;
15693
15694 s = ppc64_elf_tdata (dynobj)->got;
15695 if (s != NULL
15696 && s->size != 0
15697 && s->output_section != bfd_abs_section_ptr
15698 && !bfd_set_section_contents (output_bfd, s->output_section,
15699 s->contents, s->output_offset,
15700 s->size))
15701 return FALSE;
15702 s = ppc64_elf_tdata (dynobj)->relgot;
15703 if (s != NULL
15704 && s->size != 0
15705 && s->output_section != bfd_abs_section_ptr
15706 && !bfd_set_section_contents (output_bfd, s->output_section,
15707 s->contents, s->output_offset,
15708 s->size))
15709 return FALSE;
15710 }
15711
15712 return TRUE;
15713 }
15714
15715 #include "elf64-target.h"
15716
15717 /* FreeBSD support */
15718
15719 #undef TARGET_LITTLE_SYM
15720 #undef TARGET_LITTLE_NAME
15721
15722 #undef TARGET_BIG_SYM
15723 #define TARGET_BIG_SYM powerpc_elf64_fbsd_vec
15724 #undef TARGET_BIG_NAME
15725 #define TARGET_BIG_NAME "elf64-powerpc-freebsd"
15726
15727 #undef ELF_OSABI
15728 #define ELF_OSABI ELFOSABI_FREEBSD
15729
15730 #undef elf64_bed
15731 #define elf64_bed elf64_powerpc_fbsd_bed
15732
15733 #include "elf64-target.h"
15734
GDB Binutils - Deliverables
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