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BFD whitespace fixes
[deliverable/binutils-gdb.git] / bfd / elf64-ppc.c
1 /* PowerPC64-specific support for 64-bit ELF.
2 Copyright (C) 1999-2017 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_want_dynrelro 1
76 #define elf_backend_can_gc_sections 1
77 #define elf_backend_can_refcount 1
78 #define elf_backend_rela_normal 1
79 #define elf_backend_dtrel_excludes_plt 1
80 #define elf_backend_default_execstack 0
81
82 #define bfd_elf64_mkobject ppc64_elf_mkobject
83 #define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup
84 #define bfd_elf64_bfd_reloc_name_lookup ppc64_elf_reloc_name_lookup
85 #define bfd_elf64_bfd_merge_private_bfd_data ppc64_elf_merge_private_bfd_data
86 #define bfd_elf64_bfd_print_private_bfd_data ppc64_elf_print_private_bfd_data
87 #define bfd_elf64_new_section_hook ppc64_elf_new_section_hook
88 #define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create
89 #define bfd_elf64_get_synthetic_symtab ppc64_elf_get_synthetic_symtab
90 #define bfd_elf64_bfd_link_just_syms ppc64_elf_link_just_syms
91 #define bfd_elf64_bfd_gc_sections ppc64_elf_gc_sections
92
93 #define elf_backend_object_p ppc64_elf_object_p
94 #define elf_backend_grok_prstatus ppc64_elf_grok_prstatus
95 #define elf_backend_grok_psinfo ppc64_elf_grok_psinfo
96 #define elf_backend_write_core_note ppc64_elf_write_core_note
97 #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
98 #define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol
99 #define elf_backend_add_symbol_hook ppc64_elf_add_symbol_hook
100 #define elf_backend_check_directives ppc64_elf_before_check_relocs
101 #define elf_backend_notice_as_needed ppc64_elf_notice_as_needed
102 #define elf_backend_archive_symbol_lookup ppc64_elf_archive_symbol_lookup
103 #define elf_backend_check_relocs ppc64_elf_check_relocs
104 #define elf_backend_relocs_compatible _bfd_elf_relocs_compatible
105 #define elf_backend_gc_keep ppc64_elf_gc_keep
106 #define elf_backend_gc_mark_dynamic_ref ppc64_elf_gc_mark_dynamic_ref
107 #define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook
108 #define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol
109 #define elf_backend_hide_symbol ppc64_elf_hide_symbol
110 #define elf_backend_maybe_function_sym ppc64_elf_maybe_function_sym
111 #define elf_backend_always_size_sections ppc64_elf_func_desc_adjust
112 #define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections
113 #define elf_backend_hash_symbol ppc64_elf_hash_symbol
114 #define elf_backend_init_index_section _bfd_elf_init_2_index_sections
115 #define elf_backend_action_discarded ppc64_elf_action_discarded
116 #define elf_backend_relocate_section ppc64_elf_relocate_section
117 #define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol
118 #define elf_backend_reloc_type_class ppc64_elf_reloc_type_class
119 #define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections
120 #define elf_backend_link_output_symbol_hook ppc64_elf_output_symbol_hook
121 #define elf_backend_special_sections ppc64_elf_special_sections
122 #define elf_backend_merge_symbol_attribute ppc64_elf_merge_symbol_attribute
123 #define elf_backend_merge_symbol ppc64_elf_merge_symbol
124 #define elf_backend_get_reloc_section bfd_get_section_by_name
125
126 /* The name of the dynamic interpreter. This is put in the .interp
127 section. */
128 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
129
130 /* The size in bytes of an entry in the procedure linkage table. */
131 #define PLT_ENTRY_SIZE(htab) (htab->opd_abi ? 24 : 8)
132
133 /* The initial size of the plt reserved for the dynamic linker. */
134 #define PLT_INITIAL_ENTRY_SIZE(htab) (htab->opd_abi ? 24 : 16)
135
136 /* Offsets to some stack save slots. */
137 #define STK_LR 16
138 #define STK_TOC(htab) (htab->opd_abi ? 40 : 24)
139 /* This one is dodgy. ELFv2 does not have a linker word, so use the
140 CR save slot. Used only by optimised __tls_get_addr call stub,
141 relying on __tls_get_addr_opt not saving CR.. */
142 #define STK_LINKER(htab) (htab->opd_abi ? 32 : 8)
143
144 /* TOC base pointers offset from start of TOC. */
145 #define TOC_BASE_OFF 0x8000
146 /* TOC base alignment. */
147 #define TOC_BASE_ALIGN 256
148
149 /* Offset of tp and dtp pointers from start of TLS block. */
150 #define TP_OFFSET 0x7000
151 #define DTP_OFFSET 0x8000
152
153 /* .plt call stub instructions. The normal stub is like this, but
154 sometimes the .plt entry crosses a 64k boundary and we need to
155 insert an addi to adjust r11. */
156 #define STD_R2_0R1 0xf8410000 /* std %r2,0+40(%r1) */
157 #define ADDIS_R11_R2 0x3d620000 /* addis %r11,%r2,xxx@ha */
158 #define LD_R12_0R11 0xe98b0000 /* ld %r12,xxx+0@l(%r11) */
159 #define MTCTR_R12 0x7d8903a6 /* mtctr %r12 */
160 #define LD_R2_0R11 0xe84b0000 /* ld %r2,xxx+8@l(%r11) */
161 #define LD_R11_0R11 0xe96b0000 /* ld %r11,xxx+16@l(%r11) */
162 #define BCTR 0x4e800420 /* bctr */
163
164 #define ADDI_R11_R11 0x396b0000 /* addi %r11,%r11,off@l */
165 #define ADDIS_R2_R2 0x3c420000 /* addis %r2,%r2,off@ha */
166 #define ADDI_R2_R2 0x38420000 /* addi %r2,%r2,off@l */
167
168 #define XOR_R2_R12_R12 0x7d826278 /* xor %r2,%r12,%r12 */
169 #define ADD_R11_R11_R2 0x7d6b1214 /* add %r11,%r11,%r2 */
170 #define XOR_R11_R12_R12 0x7d8b6278 /* xor %r11,%r12,%r12 */
171 #define ADD_R2_R2_R11 0x7c425a14 /* add %r2,%r2,%r11 */
172 #define CMPLDI_R2_0 0x28220000 /* cmpldi %r2,0 */
173 #define BNECTR 0x4ca20420 /* bnectr+ */
174 #define BNECTR_P4 0x4ce20420 /* bnectr+ */
175
176 #define LD_R12_0R2 0xe9820000 /* ld %r12,xxx+0(%r2) */
177 #define LD_R11_0R2 0xe9620000 /* ld %r11,xxx+0(%r2) */
178 #define LD_R2_0R2 0xe8420000 /* ld %r2,xxx+0(%r2) */
179
180 #define LD_R2_0R1 0xe8410000 /* ld %r2,0(%r1) */
181 #define LD_R2_0R12 0xe84c0000 /* ld %r2,0(%r12) */
182 #define ADD_R2_R2_R12 0x7c426214 /* add %r2,%r2,%r12 */
183
184 #define LIS_R2 0x3c400000 /* lis %r2,xxx@ha */
185 #define ADDIS_R2_R12 0x3c4c0000 /* addis %r2,%r12,xxx@ha */
186 #define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */
187 #define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,xxx@ha */
188 #define LD_R12_0R12 0xe98c0000 /* ld %r12,xxx@l(%r12) */
189
190 /* glink call stub instructions. We enter with the index in R0. */
191 #define GLINK_CALL_STUB_SIZE (16*4)
192 /* 0: */
193 /* .quad plt0-1f */
194 /* __glink: */
195 #define MFLR_R12 0x7d8802a6 /* mflr %12 */
196 #define BCL_20_31 0x429f0005 /* bcl 20,31,1f */
197 /* 1: */
198 #define MFLR_R11 0x7d6802a6 /* mflr %11 */
199 /* ld %2,(0b-1b)(%11) */
200 #define MTLR_R12 0x7d8803a6 /* mtlr %12 */
201 #define ADD_R11_R2_R11 0x7d625a14 /* add %11,%2,%11 */
202 /* ld %12,0(%11) */
203 /* ld %2,8(%11) */
204 /* mtctr %12 */
205 /* ld %11,16(%11) */
206 /* bctr */
207 #define MFLR_R0 0x7c0802a6 /* mflr %r0 */
208 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
209 #define SUB_R12_R12_R11 0x7d8b6050 /* subf %r12,%r11,%r12 */
210 #define ADDI_R0_R12 0x380c0000 /* addi %r0,%r12,0 */
211 #define SRDI_R0_R0_2 0x7800f082 /* rldicl %r0,%r0,62,2 */
212
213 /* Pad with this. */
214 #define NOP 0x60000000
215
216 /* Some other nops. */
217 #define CROR_151515 0x4def7b82
218 #define CROR_313131 0x4ffffb82
219
220 /* .glink entries for the first 32k functions are two instructions. */
221 #define LI_R0_0 0x38000000 /* li %r0,0 */
222 #define B_DOT 0x48000000 /* b . */
223
224 /* After that, we need two instructions to load the index, followed by
225 a branch. */
226 #define LIS_R0_0 0x3c000000 /* lis %r0,0 */
227 #define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
228
229 /* Instructions used by the save and restore reg functions. */
230 #define STD_R0_0R1 0xf8010000 /* std %r0,0(%r1) */
231 #define STD_R0_0R12 0xf80c0000 /* std %r0,0(%r12) */
232 #define LD_R0_0R1 0xe8010000 /* ld %r0,0(%r1) */
233 #define LD_R0_0R12 0xe80c0000 /* ld %r0,0(%r12) */
234 #define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
235 #define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
236 #define LI_R12_0 0x39800000 /* li %r12,0 */
237 #define STVX_VR0_R12_R0 0x7c0c01ce /* stvx %v0,%r12,%r0 */
238 #define LVX_VR0_R12_R0 0x7c0c00ce /* lvx %v0,%r12,%r0 */
239 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
240 #define BLR 0x4e800020 /* blr */
241
242 /* Since .opd is an array of descriptors and each entry will end up
243 with identical R_PPC64_RELATIVE relocs, there is really no need to
244 propagate .opd relocs; The dynamic linker should be taught to
245 relocate .opd without reloc entries. */
246 #ifndef NO_OPD_RELOCS
247 #define NO_OPD_RELOCS 0
248 #endif
249
250 #ifndef ARRAY_SIZE
251 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
252 #endif
253
254 static inline int
255 abiversion (bfd *abfd)
256 {
257 return elf_elfheader (abfd)->e_flags & EF_PPC64_ABI;
258 }
259
260 static inline void
261 set_abiversion (bfd *abfd, int ver)
262 {
263 elf_elfheader (abfd)->e_flags &= ~EF_PPC64_ABI;
264 elf_elfheader (abfd)->e_flags |= ver & EF_PPC64_ABI;
265 }
266 \f
267 #define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1)
268
269 /* Relocation HOWTO's. */
270 static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max];
271
272 static reloc_howto_type ppc64_elf_howto_raw[] = {
273 /* This reloc does nothing. */
274 HOWTO (R_PPC64_NONE, /* type */
275 0, /* rightshift */
276 3, /* size (0 = byte, 1 = short, 2 = long) */
277 0, /* bitsize */
278 FALSE, /* pc_relative */
279 0, /* bitpos */
280 complain_overflow_dont, /* complain_on_overflow */
281 bfd_elf_generic_reloc, /* special_function */
282 "R_PPC64_NONE", /* name */
283 FALSE, /* partial_inplace */
284 0, /* src_mask */
285 0, /* dst_mask */
286 FALSE), /* pcrel_offset */
287
288 /* A standard 32 bit relocation. */
289 HOWTO (R_PPC64_ADDR32, /* type */
290 0, /* rightshift */
291 2, /* size (0 = byte, 1 = short, 2 = long) */
292 32, /* bitsize */
293 FALSE, /* pc_relative */
294 0, /* bitpos */
295 complain_overflow_bitfield, /* complain_on_overflow */
296 bfd_elf_generic_reloc, /* special_function */
297 "R_PPC64_ADDR32", /* name */
298 FALSE, /* partial_inplace */
299 0, /* src_mask */
300 0xffffffff, /* dst_mask */
301 FALSE), /* pcrel_offset */
302
303 /* An absolute 26 bit branch; the lower two bits must be zero.
304 FIXME: we don't check that, we just clear them. */
305 HOWTO (R_PPC64_ADDR24, /* type */
306 0, /* rightshift */
307 2, /* size (0 = byte, 1 = short, 2 = long) */
308 26, /* bitsize */
309 FALSE, /* pc_relative */
310 0, /* bitpos */
311 complain_overflow_bitfield, /* complain_on_overflow */
312 bfd_elf_generic_reloc, /* special_function */
313 "R_PPC64_ADDR24", /* name */
314 FALSE, /* partial_inplace */
315 0, /* src_mask */
316 0x03fffffc, /* dst_mask */
317 FALSE), /* pcrel_offset */
318
319 /* A standard 16 bit relocation. */
320 HOWTO (R_PPC64_ADDR16, /* type */
321 0, /* rightshift */
322 1, /* size (0 = byte, 1 = short, 2 = long) */
323 16, /* bitsize */
324 FALSE, /* pc_relative */
325 0, /* bitpos */
326 complain_overflow_bitfield, /* complain_on_overflow */
327 bfd_elf_generic_reloc, /* special_function */
328 "R_PPC64_ADDR16", /* name */
329 FALSE, /* partial_inplace */
330 0, /* src_mask */
331 0xffff, /* dst_mask */
332 FALSE), /* pcrel_offset */
333
334 /* A 16 bit relocation without overflow. */
335 HOWTO (R_PPC64_ADDR16_LO, /* type */
336 0, /* rightshift */
337 1, /* size (0 = byte, 1 = short, 2 = long) */
338 16, /* bitsize */
339 FALSE, /* pc_relative */
340 0, /* bitpos */
341 complain_overflow_dont,/* complain_on_overflow */
342 bfd_elf_generic_reloc, /* special_function */
343 "R_PPC64_ADDR16_LO", /* name */
344 FALSE, /* partial_inplace */
345 0, /* src_mask */
346 0xffff, /* dst_mask */
347 FALSE), /* pcrel_offset */
348
349 /* Bits 16-31 of an address. */
350 HOWTO (R_PPC64_ADDR16_HI, /* type */
351 16, /* rightshift */
352 1, /* size (0 = byte, 1 = short, 2 = long) */
353 16, /* bitsize */
354 FALSE, /* pc_relative */
355 0, /* bitpos */
356 complain_overflow_signed, /* complain_on_overflow */
357 bfd_elf_generic_reloc, /* special_function */
358 "R_PPC64_ADDR16_HI", /* name */
359 FALSE, /* partial_inplace */
360 0, /* src_mask */
361 0xffff, /* dst_mask */
362 FALSE), /* pcrel_offset */
363
364 /* Bits 16-31 of an address, plus 1 if the contents of the low 16
365 bits, treated as a signed number, is negative. */
366 HOWTO (R_PPC64_ADDR16_HA, /* type */
367 16, /* rightshift */
368 1, /* size (0 = byte, 1 = short, 2 = long) */
369 16, /* bitsize */
370 FALSE, /* pc_relative */
371 0, /* bitpos */
372 complain_overflow_signed, /* complain_on_overflow */
373 ppc64_elf_ha_reloc, /* special_function */
374 "R_PPC64_ADDR16_HA", /* name */
375 FALSE, /* partial_inplace */
376 0, /* src_mask */
377 0xffff, /* dst_mask */
378 FALSE), /* pcrel_offset */
379
380 /* An absolute 16 bit branch; the lower two bits must be zero.
381 FIXME: we don't check that, we just clear them. */
382 HOWTO (R_PPC64_ADDR14, /* type */
383 0, /* rightshift */
384 2, /* size (0 = byte, 1 = short, 2 = long) */
385 16, /* bitsize */
386 FALSE, /* pc_relative */
387 0, /* bitpos */
388 complain_overflow_signed, /* complain_on_overflow */
389 ppc64_elf_branch_reloc, /* special_function */
390 "R_PPC64_ADDR14", /* name */
391 FALSE, /* partial_inplace */
392 0, /* src_mask */
393 0x0000fffc, /* dst_mask */
394 FALSE), /* pcrel_offset */
395
396 /* An absolute 16 bit branch, for which bit 10 should be set to
397 indicate that the branch is expected to be taken. The lower two
398 bits must be zero. */
399 HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */
400 0, /* rightshift */
401 2, /* size (0 = byte, 1 = short, 2 = long) */
402 16, /* bitsize */
403 FALSE, /* pc_relative */
404 0, /* bitpos */
405 complain_overflow_signed, /* complain_on_overflow */
406 ppc64_elf_brtaken_reloc, /* special_function */
407 "R_PPC64_ADDR14_BRTAKEN",/* name */
408 FALSE, /* partial_inplace */
409 0, /* src_mask */
410 0x0000fffc, /* dst_mask */
411 FALSE), /* pcrel_offset */
412
413 /* An absolute 16 bit branch, for which bit 10 should be set to
414 indicate that the branch is not expected to be taken. The lower
415 two bits must be zero. */
416 HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */
417 0, /* rightshift */
418 2, /* size (0 = byte, 1 = short, 2 = long) */
419 16, /* bitsize */
420 FALSE, /* pc_relative */
421 0, /* bitpos */
422 complain_overflow_signed, /* complain_on_overflow */
423 ppc64_elf_brtaken_reloc, /* special_function */
424 "R_PPC64_ADDR14_BRNTAKEN",/* name */
425 FALSE, /* partial_inplace */
426 0, /* src_mask */
427 0x0000fffc, /* dst_mask */
428 FALSE), /* pcrel_offset */
429
430 /* A relative 26 bit branch; the lower two bits must be zero. */
431 HOWTO (R_PPC64_REL24, /* type */
432 0, /* rightshift */
433 2, /* size (0 = byte, 1 = short, 2 = long) */
434 26, /* bitsize */
435 TRUE, /* pc_relative */
436 0, /* bitpos */
437 complain_overflow_signed, /* complain_on_overflow */
438 ppc64_elf_branch_reloc, /* special_function */
439 "R_PPC64_REL24", /* name */
440 FALSE, /* partial_inplace */
441 0, /* src_mask */
442 0x03fffffc, /* dst_mask */
443 TRUE), /* pcrel_offset */
444
445 /* A relative 16 bit branch; the lower two bits must be zero. */
446 HOWTO (R_PPC64_REL14, /* type */
447 0, /* rightshift */
448 2, /* size (0 = byte, 1 = short, 2 = long) */
449 16, /* bitsize */
450 TRUE, /* pc_relative */
451 0, /* bitpos */
452 complain_overflow_signed, /* complain_on_overflow */
453 ppc64_elf_branch_reloc, /* special_function */
454 "R_PPC64_REL14", /* name */
455 FALSE, /* partial_inplace */
456 0, /* src_mask */
457 0x0000fffc, /* dst_mask */
458 TRUE), /* pcrel_offset */
459
460 /* A relative 16 bit branch. Bit 10 should be set to indicate that
461 the branch is expected to be taken. The lower two bits must be
462 zero. */
463 HOWTO (R_PPC64_REL14_BRTAKEN, /* type */
464 0, /* rightshift */
465 2, /* size (0 = byte, 1 = short, 2 = long) */
466 16, /* bitsize */
467 TRUE, /* pc_relative */
468 0, /* bitpos */
469 complain_overflow_signed, /* complain_on_overflow */
470 ppc64_elf_brtaken_reloc, /* special_function */
471 "R_PPC64_REL14_BRTAKEN", /* name */
472 FALSE, /* partial_inplace */
473 0, /* src_mask */
474 0x0000fffc, /* dst_mask */
475 TRUE), /* pcrel_offset */
476
477 /* A relative 16 bit branch. Bit 10 should be set to indicate that
478 the branch is not expected to be taken. The lower two bits must
479 be zero. */
480 HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */
481 0, /* rightshift */
482 2, /* size (0 = byte, 1 = short, 2 = long) */
483 16, /* bitsize */
484 TRUE, /* pc_relative */
485 0, /* bitpos */
486 complain_overflow_signed, /* complain_on_overflow */
487 ppc64_elf_brtaken_reloc, /* special_function */
488 "R_PPC64_REL14_BRNTAKEN",/* name */
489 FALSE, /* partial_inplace */
490 0, /* src_mask */
491 0x0000fffc, /* dst_mask */
492 TRUE), /* pcrel_offset */
493
494 /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
495 symbol. */
496 HOWTO (R_PPC64_GOT16, /* type */
497 0, /* rightshift */
498 1, /* size (0 = byte, 1 = short, 2 = long) */
499 16, /* bitsize */
500 FALSE, /* pc_relative */
501 0, /* bitpos */
502 complain_overflow_signed, /* complain_on_overflow */
503 ppc64_elf_unhandled_reloc, /* special_function */
504 "R_PPC64_GOT16", /* name */
505 FALSE, /* partial_inplace */
506 0, /* src_mask */
507 0xffff, /* dst_mask */
508 FALSE), /* pcrel_offset */
509
510 /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
511 the symbol. */
512 HOWTO (R_PPC64_GOT16_LO, /* type */
513 0, /* rightshift */
514 1, /* size (0 = byte, 1 = short, 2 = long) */
515 16, /* bitsize */
516 FALSE, /* pc_relative */
517 0, /* bitpos */
518 complain_overflow_dont, /* complain_on_overflow */
519 ppc64_elf_unhandled_reloc, /* special_function */
520 "R_PPC64_GOT16_LO", /* name */
521 FALSE, /* partial_inplace */
522 0, /* src_mask */
523 0xffff, /* dst_mask */
524 FALSE), /* pcrel_offset */
525
526 /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
527 the symbol. */
528 HOWTO (R_PPC64_GOT16_HI, /* type */
529 16, /* rightshift */
530 1, /* size (0 = byte, 1 = short, 2 = long) */
531 16, /* bitsize */
532 FALSE, /* pc_relative */
533 0, /* bitpos */
534 complain_overflow_signed,/* complain_on_overflow */
535 ppc64_elf_unhandled_reloc, /* special_function */
536 "R_PPC64_GOT16_HI", /* name */
537 FALSE, /* partial_inplace */
538 0, /* src_mask */
539 0xffff, /* dst_mask */
540 FALSE), /* pcrel_offset */
541
542 /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
543 the symbol. */
544 HOWTO (R_PPC64_GOT16_HA, /* type */
545 16, /* rightshift */
546 1, /* size (0 = byte, 1 = short, 2 = long) */
547 16, /* bitsize */
548 FALSE, /* pc_relative */
549 0, /* bitpos */
550 complain_overflow_signed,/* complain_on_overflow */
551 ppc64_elf_unhandled_reloc, /* special_function */
552 "R_PPC64_GOT16_HA", /* name */
553 FALSE, /* partial_inplace */
554 0, /* src_mask */
555 0xffff, /* dst_mask */
556 FALSE), /* pcrel_offset */
557
558 /* This is used only by the dynamic linker. The symbol should exist
559 both in the object being run and in some shared library. The
560 dynamic linker copies the data addressed by the symbol from the
561 shared library into the object, because the object being
562 run has to have the data at some particular address. */
563 HOWTO (R_PPC64_COPY, /* type */
564 0, /* rightshift */
565 0, /* this one is variable size */
566 0, /* bitsize */
567 FALSE, /* pc_relative */
568 0, /* bitpos */
569 complain_overflow_dont, /* complain_on_overflow */
570 ppc64_elf_unhandled_reloc, /* special_function */
571 "R_PPC64_COPY", /* name */
572 FALSE, /* partial_inplace */
573 0, /* src_mask */
574 0, /* dst_mask */
575 FALSE), /* pcrel_offset */
576
577 /* Like R_PPC64_ADDR64, but used when setting global offset table
578 entries. */
579 HOWTO (R_PPC64_GLOB_DAT, /* type */
580 0, /* rightshift */
581 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
582 64, /* bitsize */
583 FALSE, /* pc_relative */
584 0, /* bitpos */
585 complain_overflow_dont, /* complain_on_overflow */
586 ppc64_elf_unhandled_reloc, /* special_function */
587 "R_PPC64_GLOB_DAT", /* name */
588 FALSE, /* partial_inplace */
589 0, /* src_mask */
590 ONES (64), /* dst_mask */
591 FALSE), /* pcrel_offset */
592
593 /* Created by the link editor. Marks a procedure linkage table
594 entry for a symbol. */
595 HOWTO (R_PPC64_JMP_SLOT, /* type */
596 0, /* rightshift */
597 0, /* size (0 = byte, 1 = short, 2 = long) */
598 0, /* bitsize */
599 FALSE, /* pc_relative */
600 0, /* bitpos */
601 complain_overflow_dont, /* complain_on_overflow */
602 ppc64_elf_unhandled_reloc, /* special_function */
603 "R_PPC64_JMP_SLOT", /* name */
604 FALSE, /* partial_inplace */
605 0, /* src_mask */
606 0, /* dst_mask */
607 FALSE), /* pcrel_offset */
608
609 /* Used only by the dynamic linker. When the object is run, this
610 doubleword64 is set to the load address of the object, plus the
611 addend. */
612 HOWTO (R_PPC64_RELATIVE, /* type */
613 0, /* rightshift */
614 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
615 64, /* bitsize */
616 FALSE, /* pc_relative */
617 0, /* bitpos */
618 complain_overflow_dont, /* complain_on_overflow */
619 bfd_elf_generic_reloc, /* special_function */
620 "R_PPC64_RELATIVE", /* name */
621 FALSE, /* partial_inplace */
622 0, /* src_mask */
623 ONES (64), /* dst_mask */
624 FALSE), /* pcrel_offset */
625
626 /* Like R_PPC64_ADDR32, but may be unaligned. */
627 HOWTO (R_PPC64_UADDR32, /* type */
628 0, /* rightshift */
629 2, /* size (0 = byte, 1 = short, 2 = long) */
630 32, /* bitsize */
631 FALSE, /* pc_relative */
632 0, /* bitpos */
633 complain_overflow_bitfield, /* complain_on_overflow */
634 bfd_elf_generic_reloc, /* special_function */
635 "R_PPC64_UADDR32", /* name */
636 FALSE, /* partial_inplace */
637 0, /* src_mask */
638 0xffffffff, /* dst_mask */
639 FALSE), /* pcrel_offset */
640
641 /* Like R_PPC64_ADDR16, but may be unaligned. */
642 HOWTO (R_PPC64_UADDR16, /* type */
643 0, /* rightshift */
644 1, /* size (0 = byte, 1 = short, 2 = long) */
645 16, /* bitsize */
646 FALSE, /* pc_relative */
647 0, /* bitpos */
648 complain_overflow_bitfield, /* complain_on_overflow */
649 bfd_elf_generic_reloc, /* special_function */
650 "R_PPC64_UADDR16", /* name */
651 FALSE, /* partial_inplace */
652 0, /* src_mask */
653 0xffff, /* dst_mask */
654 FALSE), /* pcrel_offset */
655
656 /* 32-bit PC relative. */
657 HOWTO (R_PPC64_REL32, /* type */
658 0, /* rightshift */
659 2, /* size (0 = byte, 1 = short, 2 = long) */
660 32, /* bitsize */
661 TRUE, /* pc_relative */
662 0, /* bitpos */
663 complain_overflow_signed, /* complain_on_overflow */
664 bfd_elf_generic_reloc, /* special_function */
665 "R_PPC64_REL32", /* name */
666 FALSE, /* partial_inplace */
667 0, /* src_mask */
668 0xffffffff, /* dst_mask */
669 TRUE), /* pcrel_offset */
670
671 /* 32-bit relocation to the symbol's procedure linkage table. */
672 HOWTO (R_PPC64_PLT32, /* type */
673 0, /* rightshift */
674 2, /* size (0 = byte, 1 = short, 2 = long) */
675 32, /* bitsize */
676 FALSE, /* pc_relative */
677 0, /* bitpos */
678 complain_overflow_bitfield, /* complain_on_overflow */
679 ppc64_elf_unhandled_reloc, /* special_function */
680 "R_PPC64_PLT32", /* name */
681 FALSE, /* partial_inplace */
682 0, /* src_mask */
683 0xffffffff, /* dst_mask */
684 FALSE), /* pcrel_offset */
685
686 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
687 FIXME: R_PPC64_PLTREL32 not supported. */
688 HOWTO (R_PPC64_PLTREL32, /* type */
689 0, /* rightshift */
690 2, /* size (0 = byte, 1 = short, 2 = long) */
691 32, /* bitsize */
692 TRUE, /* pc_relative */
693 0, /* bitpos */
694 complain_overflow_signed, /* complain_on_overflow */
695 ppc64_elf_unhandled_reloc, /* special_function */
696 "R_PPC64_PLTREL32", /* name */
697 FALSE, /* partial_inplace */
698 0, /* src_mask */
699 0xffffffff, /* dst_mask */
700 TRUE), /* pcrel_offset */
701
702 /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
703 the symbol. */
704 HOWTO (R_PPC64_PLT16_LO, /* type */
705 0, /* rightshift */
706 1, /* size (0 = byte, 1 = short, 2 = long) */
707 16, /* bitsize */
708 FALSE, /* pc_relative */
709 0, /* bitpos */
710 complain_overflow_dont, /* complain_on_overflow */
711 ppc64_elf_unhandled_reloc, /* special_function */
712 "R_PPC64_PLT16_LO", /* name */
713 FALSE, /* partial_inplace */
714 0, /* src_mask */
715 0xffff, /* dst_mask */
716 FALSE), /* pcrel_offset */
717
718 /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
719 the symbol. */
720 HOWTO (R_PPC64_PLT16_HI, /* type */
721 16, /* rightshift */
722 1, /* size (0 = byte, 1 = short, 2 = long) */
723 16, /* bitsize */
724 FALSE, /* pc_relative */
725 0, /* bitpos */
726 complain_overflow_signed, /* complain_on_overflow */
727 ppc64_elf_unhandled_reloc, /* special_function */
728 "R_PPC64_PLT16_HI", /* name */
729 FALSE, /* partial_inplace */
730 0, /* src_mask */
731 0xffff, /* dst_mask */
732 FALSE), /* pcrel_offset */
733
734 /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
735 the symbol. */
736 HOWTO (R_PPC64_PLT16_HA, /* type */
737 16, /* rightshift */
738 1, /* size (0 = byte, 1 = short, 2 = long) */
739 16, /* bitsize */
740 FALSE, /* pc_relative */
741 0, /* bitpos */
742 complain_overflow_signed, /* complain_on_overflow */
743 ppc64_elf_unhandled_reloc, /* special_function */
744 "R_PPC64_PLT16_HA", /* name */
745 FALSE, /* partial_inplace */
746 0, /* src_mask */
747 0xffff, /* dst_mask */
748 FALSE), /* pcrel_offset */
749
750 /* 16-bit section relative relocation. */
751 HOWTO (R_PPC64_SECTOFF, /* type */
752 0, /* rightshift */
753 1, /* size (0 = byte, 1 = short, 2 = long) */
754 16, /* bitsize */
755 FALSE, /* pc_relative */
756 0, /* bitpos */
757 complain_overflow_signed, /* complain_on_overflow */
758 ppc64_elf_sectoff_reloc, /* special_function */
759 "R_PPC64_SECTOFF", /* name */
760 FALSE, /* partial_inplace */
761 0, /* src_mask */
762 0xffff, /* dst_mask */
763 FALSE), /* pcrel_offset */
764
765 /* Like R_PPC64_SECTOFF, but no overflow warning. */
766 HOWTO (R_PPC64_SECTOFF_LO, /* type */
767 0, /* rightshift */
768 1, /* size (0 = byte, 1 = short, 2 = long) */
769 16, /* bitsize */
770 FALSE, /* pc_relative */
771 0, /* bitpos */
772 complain_overflow_dont, /* complain_on_overflow */
773 ppc64_elf_sectoff_reloc, /* special_function */
774 "R_PPC64_SECTOFF_LO", /* name */
775 FALSE, /* partial_inplace */
776 0, /* src_mask */
777 0xffff, /* dst_mask */
778 FALSE), /* pcrel_offset */
779
780 /* 16-bit upper half section relative relocation. */
781 HOWTO (R_PPC64_SECTOFF_HI, /* type */
782 16, /* rightshift */
783 1, /* size (0 = byte, 1 = short, 2 = long) */
784 16, /* bitsize */
785 FALSE, /* pc_relative */
786 0, /* bitpos */
787 complain_overflow_signed, /* complain_on_overflow */
788 ppc64_elf_sectoff_reloc, /* special_function */
789 "R_PPC64_SECTOFF_HI", /* name */
790 FALSE, /* partial_inplace */
791 0, /* src_mask */
792 0xffff, /* dst_mask */
793 FALSE), /* pcrel_offset */
794
795 /* 16-bit upper half adjusted section relative relocation. */
796 HOWTO (R_PPC64_SECTOFF_HA, /* type */
797 16, /* rightshift */
798 1, /* size (0 = byte, 1 = short, 2 = long) */
799 16, /* bitsize */
800 FALSE, /* pc_relative */
801 0, /* bitpos */
802 complain_overflow_signed, /* complain_on_overflow */
803 ppc64_elf_sectoff_ha_reloc, /* special_function */
804 "R_PPC64_SECTOFF_HA", /* name */
805 FALSE, /* partial_inplace */
806 0, /* src_mask */
807 0xffff, /* dst_mask */
808 FALSE), /* pcrel_offset */
809
810 /* Like R_PPC64_REL24 without touching the two least significant bits. */
811 HOWTO (R_PPC64_REL30, /* type */
812 2, /* rightshift */
813 2, /* size (0 = byte, 1 = short, 2 = long) */
814 30, /* bitsize */
815 TRUE, /* pc_relative */
816 0, /* bitpos */
817 complain_overflow_dont, /* complain_on_overflow */
818 bfd_elf_generic_reloc, /* special_function */
819 "R_PPC64_REL30", /* name */
820 FALSE, /* partial_inplace */
821 0, /* src_mask */
822 0xfffffffc, /* dst_mask */
823 TRUE), /* pcrel_offset */
824
825 /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
826
827 /* A standard 64-bit relocation. */
828 HOWTO (R_PPC64_ADDR64, /* type */
829 0, /* rightshift */
830 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
831 64, /* bitsize */
832 FALSE, /* pc_relative */
833 0, /* bitpos */
834 complain_overflow_dont, /* complain_on_overflow */
835 bfd_elf_generic_reloc, /* special_function */
836 "R_PPC64_ADDR64", /* name */
837 FALSE, /* partial_inplace */
838 0, /* src_mask */
839 ONES (64), /* dst_mask */
840 FALSE), /* pcrel_offset */
841
842 /* The bits 32-47 of an address. */
843 HOWTO (R_PPC64_ADDR16_HIGHER, /* type */
844 32, /* rightshift */
845 1, /* size (0 = byte, 1 = short, 2 = long) */
846 16, /* bitsize */
847 FALSE, /* pc_relative */
848 0, /* bitpos */
849 complain_overflow_dont, /* complain_on_overflow */
850 bfd_elf_generic_reloc, /* special_function */
851 "R_PPC64_ADDR16_HIGHER", /* name */
852 FALSE, /* partial_inplace */
853 0, /* src_mask */
854 0xffff, /* dst_mask */
855 FALSE), /* pcrel_offset */
856
857 /* The bits 32-47 of an address, plus 1 if the contents of the low
858 16 bits, treated as a signed number, is negative. */
859 HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */
860 32, /* rightshift */
861 1, /* size (0 = byte, 1 = short, 2 = long) */
862 16, /* bitsize */
863 FALSE, /* pc_relative */
864 0, /* bitpos */
865 complain_overflow_dont, /* complain_on_overflow */
866 ppc64_elf_ha_reloc, /* special_function */
867 "R_PPC64_ADDR16_HIGHERA", /* name */
868 FALSE, /* partial_inplace */
869 0, /* src_mask */
870 0xffff, /* dst_mask */
871 FALSE), /* pcrel_offset */
872
873 /* The bits 48-63 of an address. */
874 HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */
875 48, /* rightshift */
876 1, /* size (0 = byte, 1 = short, 2 = long) */
877 16, /* bitsize */
878 FALSE, /* pc_relative */
879 0, /* bitpos */
880 complain_overflow_dont, /* complain_on_overflow */
881 bfd_elf_generic_reloc, /* special_function */
882 "R_PPC64_ADDR16_HIGHEST", /* name */
883 FALSE, /* partial_inplace */
884 0, /* src_mask */
885 0xffff, /* dst_mask */
886 FALSE), /* pcrel_offset */
887
888 /* The bits 48-63 of an address, plus 1 if the contents of the low
889 16 bits, treated as a signed number, is negative. */
890 HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */
891 48, /* rightshift */
892 1, /* size (0 = byte, 1 = short, 2 = long) */
893 16, /* bitsize */
894 FALSE, /* pc_relative */
895 0, /* bitpos */
896 complain_overflow_dont, /* complain_on_overflow */
897 ppc64_elf_ha_reloc, /* special_function */
898 "R_PPC64_ADDR16_HIGHESTA", /* name */
899 FALSE, /* partial_inplace */
900 0, /* src_mask */
901 0xffff, /* dst_mask */
902 FALSE), /* pcrel_offset */
903
904 /* Like ADDR64, but may be unaligned. */
905 HOWTO (R_PPC64_UADDR64, /* type */
906 0, /* rightshift */
907 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
908 64, /* bitsize */
909 FALSE, /* pc_relative */
910 0, /* bitpos */
911 complain_overflow_dont, /* complain_on_overflow */
912 bfd_elf_generic_reloc, /* special_function */
913 "R_PPC64_UADDR64", /* name */
914 FALSE, /* partial_inplace */
915 0, /* src_mask */
916 ONES (64), /* dst_mask */
917 FALSE), /* pcrel_offset */
918
919 /* 64-bit relative relocation. */
920 HOWTO (R_PPC64_REL64, /* type */
921 0, /* rightshift */
922 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
923 64, /* bitsize */
924 TRUE, /* pc_relative */
925 0, /* bitpos */
926 complain_overflow_dont, /* complain_on_overflow */
927 bfd_elf_generic_reloc, /* special_function */
928 "R_PPC64_REL64", /* name */
929 FALSE, /* partial_inplace */
930 0, /* src_mask */
931 ONES (64), /* dst_mask */
932 TRUE), /* pcrel_offset */
933
934 /* 64-bit relocation to the symbol's procedure linkage table. */
935 HOWTO (R_PPC64_PLT64, /* type */
936 0, /* rightshift */
937 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
938 64, /* bitsize */
939 FALSE, /* pc_relative */
940 0, /* bitpos */
941 complain_overflow_dont, /* complain_on_overflow */
942 ppc64_elf_unhandled_reloc, /* special_function */
943 "R_PPC64_PLT64", /* name */
944 FALSE, /* partial_inplace */
945 0, /* src_mask */
946 ONES (64), /* dst_mask */
947 FALSE), /* pcrel_offset */
948
949 /* 64-bit PC relative relocation to the symbol's procedure linkage
950 table. */
951 /* FIXME: R_PPC64_PLTREL64 not supported. */
952 HOWTO (R_PPC64_PLTREL64, /* type */
953 0, /* rightshift */
954 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
955 64, /* bitsize */
956 TRUE, /* pc_relative */
957 0, /* bitpos */
958 complain_overflow_dont, /* complain_on_overflow */
959 ppc64_elf_unhandled_reloc, /* special_function */
960 "R_PPC64_PLTREL64", /* name */
961 FALSE, /* partial_inplace */
962 0, /* src_mask */
963 ONES (64), /* dst_mask */
964 TRUE), /* pcrel_offset */
965
966 /* 16 bit TOC-relative relocation. */
967
968 /* R_PPC64_TOC16 47 half16* S + A - .TOC. */
969 HOWTO (R_PPC64_TOC16, /* type */
970 0, /* rightshift */
971 1, /* size (0 = byte, 1 = short, 2 = long) */
972 16, /* bitsize */
973 FALSE, /* pc_relative */
974 0, /* bitpos */
975 complain_overflow_signed, /* complain_on_overflow */
976 ppc64_elf_toc_reloc, /* special_function */
977 "R_PPC64_TOC16", /* name */
978 FALSE, /* partial_inplace */
979 0, /* src_mask */
980 0xffff, /* dst_mask */
981 FALSE), /* pcrel_offset */
982
983 /* 16 bit TOC-relative relocation without overflow. */
984
985 /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
986 HOWTO (R_PPC64_TOC16_LO, /* type */
987 0, /* rightshift */
988 1, /* size (0 = byte, 1 = short, 2 = long) */
989 16, /* bitsize */
990 FALSE, /* pc_relative */
991 0, /* bitpos */
992 complain_overflow_dont, /* complain_on_overflow */
993 ppc64_elf_toc_reloc, /* special_function */
994 "R_PPC64_TOC16_LO", /* name */
995 FALSE, /* partial_inplace */
996 0, /* src_mask */
997 0xffff, /* dst_mask */
998 FALSE), /* pcrel_offset */
999
1000 /* 16 bit TOC-relative relocation, high 16 bits. */
1001
1002 /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
1003 HOWTO (R_PPC64_TOC16_HI, /* type */
1004 16, /* rightshift */
1005 1, /* size (0 = byte, 1 = short, 2 = long) */
1006 16, /* bitsize */
1007 FALSE, /* pc_relative */
1008 0, /* bitpos */
1009 complain_overflow_signed, /* complain_on_overflow */
1010 ppc64_elf_toc_reloc, /* special_function */
1011 "R_PPC64_TOC16_HI", /* name */
1012 FALSE, /* partial_inplace */
1013 0, /* src_mask */
1014 0xffff, /* dst_mask */
1015 FALSE), /* pcrel_offset */
1016
1017 /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the
1018 contents of the low 16 bits, treated as a signed number, is
1019 negative. */
1020
1021 /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
1022 HOWTO (R_PPC64_TOC16_HA, /* type */
1023 16, /* rightshift */
1024 1, /* size (0 = byte, 1 = short, 2 = long) */
1025 16, /* bitsize */
1026 FALSE, /* pc_relative */
1027 0, /* bitpos */
1028 complain_overflow_signed, /* complain_on_overflow */
1029 ppc64_elf_toc_ha_reloc, /* special_function */
1030 "R_PPC64_TOC16_HA", /* name */
1031 FALSE, /* partial_inplace */
1032 0, /* src_mask */
1033 0xffff, /* dst_mask */
1034 FALSE), /* pcrel_offset */
1035
1036 /* 64-bit relocation; insert value of TOC base (.TOC.). */
1037
1038 /* R_PPC64_TOC 51 doubleword64 .TOC. */
1039 HOWTO (R_PPC64_TOC, /* type */
1040 0, /* rightshift */
1041 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1042 64, /* bitsize */
1043 FALSE, /* pc_relative */
1044 0, /* bitpos */
1045 complain_overflow_dont, /* complain_on_overflow */
1046 ppc64_elf_toc64_reloc, /* special_function */
1047 "R_PPC64_TOC", /* name */
1048 FALSE, /* partial_inplace */
1049 0, /* src_mask */
1050 ONES (64), /* dst_mask */
1051 FALSE), /* pcrel_offset */
1052
1053 /* Like R_PPC64_GOT16, but also informs the link editor that the
1054 value to relocate may (!) refer to a PLT entry which the link
1055 editor (a) may replace with the symbol value. If the link editor
1056 is unable to fully resolve the symbol, it may (b) create a PLT
1057 entry and store the address to the new PLT entry in the GOT.
1058 This permits lazy resolution of function symbols at run time.
1059 The link editor may also skip all of this and just (c) emit a
1060 R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
1061 /* FIXME: R_PPC64_PLTGOT16 not implemented. */
1062 HOWTO (R_PPC64_PLTGOT16, /* type */
1063 0, /* rightshift */
1064 1, /* size (0 = byte, 1 = short, 2 = long) */
1065 16, /* bitsize */
1066 FALSE, /* pc_relative */
1067 0, /* bitpos */
1068 complain_overflow_signed, /* complain_on_overflow */
1069 ppc64_elf_unhandled_reloc, /* special_function */
1070 "R_PPC64_PLTGOT16", /* name */
1071 FALSE, /* partial_inplace */
1072 0, /* src_mask */
1073 0xffff, /* dst_mask */
1074 FALSE), /* pcrel_offset */
1075
1076 /* Like R_PPC64_PLTGOT16, but without overflow. */
1077 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1078 HOWTO (R_PPC64_PLTGOT16_LO, /* type */
1079 0, /* rightshift */
1080 1, /* size (0 = byte, 1 = short, 2 = long) */
1081 16, /* bitsize */
1082 FALSE, /* pc_relative */
1083 0, /* bitpos */
1084 complain_overflow_dont, /* complain_on_overflow */
1085 ppc64_elf_unhandled_reloc, /* special_function */
1086 "R_PPC64_PLTGOT16_LO", /* name */
1087 FALSE, /* partial_inplace */
1088 0, /* src_mask */
1089 0xffff, /* dst_mask */
1090 FALSE), /* pcrel_offset */
1091
1092 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */
1093 /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */
1094 HOWTO (R_PPC64_PLTGOT16_HI, /* type */
1095 16, /* rightshift */
1096 1, /* size (0 = byte, 1 = short, 2 = long) */
1097 16, /* bitsize */
1098 FALSE, /* pc_relative */
1099 0, /* bitpos */
1100 complain_overflow_signed, /* complain_on_overflow */
1101 ppc64_elf_unhandled_reloc, /* special_function */
1102 "R_PPC64_PLTGOT16_HI", /* name */
1103 FALSE, /* partial_inplace */
1104 0, /* src_mask */
1105 0xffff, /* dst_mask */
1106 FALSE), /* pcrel_offset */
1107
1108 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus
1109 1 if the contents of the low 16 bits, treated as a signed number,
1110 is negative. */
1111 /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */
1112 HOWTO (R_PPC64_PLTGOT16_HA, /* type */
1113 16, /* rightshift */
1114 1, /* size (0 = byte, 1 = short, 2 = long) */
1115 16, /* bitsize */
1116 FALSE, /* pc_relative */
1117 0, /* bitpos */
1118 complain_overflow_signed, /* complain_on_overflow */
1119 ppc64_elf_unhandled_reloc, /* special_function */
1120 "R_PPC64_PLTGOT16_HA", /* name */
1121 FALSE, /* partial_inplace */
1122 0, /* src_mask */
1123 0xffff, /* dst_mask */
1124 FALSE), /* pcrel_offset */
1125
1126 /* Like R_PPC64_ADDR16, but for instructions with a DS field. */
1127 HOWTO (R_PPC64_ADDR16_DS, /* type */
1128 0, /* rightshift */
1129 1, /* size (0 = byte, 1 = short, 2 = long) */
1130 16, /* bitsize */
1131 FALSE, /* pc_relative */
1132 0, /* bitpos */
1133 complain_overflow_signed, /* complain_on_overflow */
1134 bfd_elf_generic_reloc, /* special_function */
1135 "R_PPC64_ADDR16_DS", /* name */
1136 FALSE, /* partial_inplace */
1137 0, /* src_mask */
1138 0xfffc, /* dst_mask */
1139 FALSE), /* pcrel_offset */
1140
1141 /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
1142 HOWTO (R_PPC64_ADDR16_LO_DS, /* type */
1143 0, /* rightshift */
1144 1, /* size (0 = byte, 1 = short, 2 = long) */
1145 16, /* bitsize */
1146 FALSE, /* pc_relative */
1147 0, /* bitpos */
1148 complain_overflow_dont,/* complain_on_overflow */
1149 bfd_elf_generic_reloc, /* special_function */
1150 "R_PPC64_ADDR16_LO_DS",/* name */
1151 FALSE, /* partial_inplace */
1152 0, /* src_mask */
1153 0xfffc, /* dst_mask */
1154 FALSE), /* pcrel_offset */
1155
1156 /* Like R_PPC64_GOT16, but for instructions with a DS field. */
1157 HOWTO (R_PPC64_GOT16_DS, /* type */
1158 0, /* rightshift */
1159 1, /* size (0 = byte, 1 = short, 2 = long) */
1160 16, /* bitsize */
1161 FALSE, /* pc_relative */
1162 0, /* bitpos */
1163 complain_overflow_signed, /* complain_on_overflow */
1164 ppc64_elf_unhandled_reloc, /* special_function */
1165 "R_PPC64_GOT16_DS", /* name */
1166 FALSE, /* partial_inplace */
1167 0, /* src_mask */
1168 0xfffc, /* dst_mask */
1169 FALSE), /* pcrel_offset */
1170
1171 /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
1172 HOWTO (R_PPC64_GOT16_LO_DS, /* type */
1173 0, /* rightshift */
1174 1, /* size (0 = byte, 1 = short, 2 = long) */
1175 16, /* bitsize */
1176 FALSE, /* pc_relative */
1177 0, /* bitpos */
1178 complain_overflow_dont, /* complain_on_overflow */
1179 ppc64_elf_unhandled_reloc, /* special_function */
1180 "R_PPC64_GOT16_LO_DS", /* name */
1181 FALSE, /* partial_inplace */
1182 0, /* src_mask */
1183 0xfffc, /* dst_mask */
1184 FALSE), /* pcrel_offset */
1185
1186 /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
1187 HOWTO (R_PPC64_PLT16_LO_DS, /* type */
1188 0, /* rightshift */
1189 1, /* size (0 = byte, 1 = short, 2 = long) */
1190 16, /* bitsize */
1191 FALSE, /* pc_relative */
1192 0, /* bitpos */
1193 complain_overflow_dont, /* complain_on_overflow */
1194 ppc64_elf_unhandled_reloc, /* special_function */
1195 "R_PPC64_PLT16_LO_DS", /* name */
1196 FALSE, /* partial_inplace */
1197 0, /* src_mask */
1198 0xfffc, /* dst_mask */
1199 FALSE), /* pcrel_offset */
1200
1201 /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
1202 HOWTO (R_PPC64_SECTOFF_DS, /* type */
1203 0, /* rightshift */
1204 1, /* size (0 = byte, 1 = short, 2 = long) */
1205 16, /* bitsize */
1206 FALSE, /* pc_relative */
1207 0, /* bitpos */
1208 complain_overflow_signed, /* complain_on_overflow */
1209 ppc64_elf_sectoff_reloc, /* special_function */
1210 "R_PPC64_SECTOFF_DS", /* name */
1211 FALSE, /* partial_inplace */
1212 0, /* src_mask */
1213 0xfffc, /* dst_mask */
1214 FALSE), /* pcrel_offset */
1215
1216 /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
1217 HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */
1218 0, /* rightshift */
1219 1, /* size (0 = byte, 1 = short, 2 = long) */
1220 16, /* bitsize */
1221 FALSE, /* pc_relative */
1222 0, /* bitpos */
1223 complain_overflow_dont, /* complain_on_overflow */
1224 ppc64_elf_sectoff_reloc, /* special_function */
1225 "R_PPC64_SECTOFF_LO_DS",/* name */
1226 FALSE, /* partial_inplace */
1227 0, /* src_mask */
1228 0xfffc, /* dst_mask */
1229 FALSE), /* pcrel_offset */
1230
1231 /* Like R_PPC64_TOC16, but for instructions with a DS field. */
1232 HOWTO (R_PPC64_TOC16_DS, /* type */
1233 0, /* rightshift */
1234 1, /* size (0 = byte, 1 = short, 2 = long) */
1235 16, /* bitsize */
1236 FALSE, /* pc_relative */
1237 0, /* bitpos */
1238 complain_overflow_signed, /* complain_on_overflow */
1239 ppc64_elf_toc_reloc, /* special_function */
1240 "R_PPC64_TOC16_DS", /* name */
1241 FALSE, /* partial_inplace */
1242 0, /* src_mask */
1243 0xfffc, /* dst_mask */
1244 FALSE), /* pcrel_offset */
1245
1246 /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
1247 HOWTO (R_PPC64_TOC16_LO_DS, /* type */
1248 0, /* rightshift */
1249 1, /* size (0 = byte, 1 = short, 2 = long) */
1250 16, /* bitsize */
1251 FALSE, /* pc_relative */
1252 0, /* bitpos */
1253 complain_overflow_dont, /* complain_on_overflow */
1254 ppc64_elf_toc_reloc, /* special_function */
1255 "R_PPC64_TOC16_LO_DS", /* name */
1256 FALSE, /* partial_inplace */
1257 0, /* src_mask */
1258 0xfffc, /* dst_mask */
1259 FALSE), /* pcrel_offset */
1260
1261 /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
1262 /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
1263 HOWTO (R_PPC64_PLTGOT16_DS, /* type */
1264 0, /* rightshift */
1265 1, /* size (0 = byte, 1 = short, 2 = long) */
1266 16, /* bitsize */
1267 FALSE, /* pc_relative */
1268 0, /* bitpos */
1269 complain_overflow_signed, /* complain_on_overflow */
1270 ppc64_elf_unhandled_reloc, /* special_function */
1271 "R_PPC64_PLTGOT16_DS", /* name */
1272 FALSE, /* partial_inplace */
1273 0, /* src_mask */
1274 0xfffc, /* dst_mask */
1275 FALSE), /* pcrel_offset */
1276
1277 /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */
1278 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1279 HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */
1280 0, /* rightshift */
1281 1, /* size (0 = byte, 1 = short, 2 = long) */
1282 16, /* bitsize */
1283 FALSE, /* pc_relative */
1284 0, /* bitpos */
1285 complain_overflow_dont, /* complain_on_overflow */
1286 ppc64_elf_unhandled_reloc, /* special_function */
1287 "R_PPC64_PLTGOT16_LO_DS",/* name */
1288 FALSE, /* partial_inplace */
1289 0, /* src_mask */
1290 0xfffc, /* dst_mask */
1291 FALSE), /* pcrel_offset */
1292
1293 /* Marker relocs for TLS. */
1294 HOWTO (R_PPC64_TLS,
1295 0, /* rightshift */
1296 2, /* size (0 = byte, 1 = short, 2 = long) */
1297 32, /* bitsize */
1298 FALSE, /* pc_relative */
1299 0, /* bitpos */
1300 complain_overflow_dont, /* complain_on_overflow */
1301 bfd_elf_generic_reloc, /* special_function */
1302 "R_PPC64_TLS", /* name */
1303 FALSE, /* partial_inplace */
1304 0, /* src_mask */
1305 0, /* dst_mask */
1306 FALSE), /* pcrel_offset */
1307
1308 HOWTO (R_PPC64_TLSGD,
1309 0, /* rightshift */
1310 2, /* size (0 = byte, 1 = short, 2 = long) */
1311 32, /* bitsize */
1312 FALSE, /* pc_relative */
1313 0, /* bitpos */
1314 complain_overflow_dont, /* complain_on_overflow */
1315 bfd_elf_generic_reloc, /* special_function */
1316 "R_PPC64_TLSGD", /* name */
1317 FALSE, /* partial_inplace */
1318 0, /* src_mask */
1319 0, /* dst_mask */
1320 FALSE), /* pcrel_offset */
1321
1322 HOWTO (R_PPC64_TLSLD,
1323 0, /* rightshift */
1324 2, /* size (0 = byte, 1 = short, 2 = long) */
1325 32, /* bitsize */
1326 FALSE, /* pc_relative */
1327 0, /* bitpos */
1328 complain_overflow_dont, /* complain_on_overflow */
1329 bfd_elf_generic_reloc, /* special_function */
1330 "R_PPC64_TLSLD", /* name */
1331 FALSE, /* partial_inplace */
1332 0, /* src_mask */
1333 0, /* dst_mask */
1334 FALSE), /* pcrel_offset */
1335
1336 HOWTO (R_PPC64_TOCSAVE,
1337 0, /* rightshift */
1338 2, /* size (0 = byte, 1 = short, 2 = long) */
1339 32, /* bitsize */
1340 FALSE, /* pc_relative */
1341 0, /* bitpos */
1342 complain_overflow_dont, /* complain_on_overflow */
1343 bfd_elf_generic_reloc, /* special_function */
1344 "R_PPC64_TOCSAVE", /* name */
1345 FALSE, /* partial_inplace */
1346 0, /* src_mask */
1347 0, /* dst_mask */
1348 FALSE), /* pcrel_offset */
1349
1350 /* Computes the load module index of the load module that contains the
1351 definition of its TLS sym. */
1352 HOWTO (R_PPC64_DTPMOD64,
1353 0, /* rightshift */
1354 4, /* size (0 = byte, 1 = short, 2 = long) */
1355 64, /* bitsize */
1356 FALSE, /* pc_relative */
1357 0, /* bitpos */
1358 complain_overflow_dont, /* complain_on_overflow */
1359 ppc64_elf_unhandled_reloc, /* special_function */
1360 "R_PPC64_DTPMOD64", /* name */
1361 FALSE, /* partial_inplace */
1362 0, /* src_mask */
1363 ONES (64), /* dst_mask */
1364 FALSE), /* pcrel_offset */
1365
1366 /* Computes a dtv-relative displacement, the difference between the value
1367 of sym+add and the base address of the thread-local storage block that
1368 contains the definition of sym, minus 0x8000. */
1369 HOWTO (R_PPC64_DTPREL64,
1370 0, /* rightshift */
1371 4, /* size (0 = byte, 1 = short, 2 = long) */
1372 64, /* bitsize */
1373 FALSE, /* pc_relative */
1374 0, /* bitpos */
1375 complain_overflow_dont, /* complain_on_overflow */
1376 ppc64_elf_unhandled_reloc, /* special_function */
1377 "R_PPC64_DTPREL64", /* name */
1378 FALSE, /* partial_inplace */
1379 0, /* src_mask */
1380 ONES (64), /* dst_mask */
1381 FALSE), /* pcrel_offset */
1382
1383 /* A 16 bit dtprel reloc. */
1384 HOWTO (R_PPC64_DTPREL16,
1385 0, /* rightshift */
1386 1, /* size (0 = byte, 1 = short, 2 = long) */
1387 16, /* bitsize */
1388 FALSE, /* pc_relative */
1389 0, /* bitpos */
1390 complain_overflow_signed, /* complain_on_overflow */
1391 ppc64_elf_unhandled_reloc, /* special_function */
1392 "R_PPC64_DTPREL16", /* name */
1393 FALSE, /* partial_inplace */
1394 0, /* src_mask */
1395 0xffff, /* dst_mask */
1396 FALSE), /* pcrel_offset */
1397
1398 /* Like DTPREL16, but no overflow. */
1399 HOWTO (R_PPC64_DTPREL16_LO,
1400 0, /* rightshift */
1401 1, /* size (0 = byte, 1 = short, 2 = long) */
1402 16, /* bitsize */
1403 FALSE, /* pc_relative */
1404 0, /* bitpos */
1405 complain_overflow_dont, /* complain_on_overflow */
1406 ppc64_elf_unhandled_reloc, /* special_function */
1407 "R_PPC64_DTPREL16_LO", /* name */
1408 FALSE, /* partial_inplace */
1409 0, /* src_mask */
1410 0xffff, /* dst_mask */
1411 FALSE), /* pcrel_offset */
1412
1413 /* Like DTPREL16_LO, but next higher group of 16 bits. */
1414 HOWTO (R_PPC64_DTPREL16_HI,
1415 16, /* rightshift */
1416 1, /* size (0 = byte, 1 = short, 2 = long) */
1417 16, /* bitsize */
1418 FALSE, /* pc_relative */
1419 0, /* bitpos */
1420 complain_overflow_signed, /* complain_on_overflow */
1421 ppc64_elf_unhandled_reloc, /* special_function */
1422 "R_PPC64_DTPREL16_HI", /* name */
1423 FALSE, /* partial_inplace */
1424 0, /* src_mask */
1425 0xffff, /* dst_mask */
1426 FALSE), /* pcrel_offset */
1427
1428 /* Like DTPREL16_HI, but adjust for low 16 bits. */
1429 HOWTO (R_PPC64_DTPREL16_HA,
1430 16, /* rightshift */
1431 1, /* size (0 = byte, 1 = short, 2 = long) */
1432 16, /* bitsize */
1433 FALSE, /* pc_relative */
1434 0, /* bitpos */
1435 complain_overflow_signed, /* complain_on_overflow */
1436 ppc64_elf_unhandled_reloc, /* special_function */
1437 "R_PPC64_DTPREL16_HA", /* name */
1438 FALSE, /* partial_inplace */
1439 0, /* src_mask */
1440 0xffff, /* dst_mask */
1441 FALSE), /* pcrel_offset */
1442
1443 /* Like DTPREL16_HI, but next higher group of 16 bits. */
1444 HOWTO (R_PPC64_DTPREL16_HIGHER,
1445 32, /* rightshift */
1446 1, /* size (0 = byte, 1 = short, 2 = long) */
1447 16, /* bitsize */
1448 FALSE, /* pc_relative */
1449 0, /* bitpos */
1450 complain_overflow_dont, /* complain_on_overflow */
1451 ppc64_elf_unhandled_reloc, /* special_function */
1452 "R_PPC64_DTPREL16_HIGHER", /* name */
1453 FALSE, /* partial_inplace */
1454 0, /* src_mask */
1455 0xffff, /* dst_mask */
1456 FALSE), /* pcrel_offset */
1457
1458 /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */
1459 HOWTO (R_PPC64_DTPREL16_HIGHERA,
1460 32, /* rightshift */
1461 1, /* size (0 = byte, 1 = short, 2 = long) */
1462 16, /* bitsize */
1463 FALSE, /* pc_relative */
1464 0, /* bitpos */
1465 complain_overflow_dont, /* complain_on_overflow */
1466 ppc64_elf_unhandled_reloc, /* special_function */
1467 "R_PPC64_DTPREL16_HIGHERA", /* name */
1468 FALSE, /* partial_inplace */
1469 0, /* src_mask */
1470 0xffff, /* dst_mask */
1471 FALSE), /* pcrel_offset */
1472
1473 /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */
1474 HOWTO (R_PPC64_DTPREL16_HIGHEST,
1475 48, /* rightshift */
1476 1, /* size (0 = byte, 1 = short, 2 = long) */
1477 16, /* bitsize */
1478 FALSE, /* pc_relative */
1479 0, /* bitpos */
1480 complain_overflow_dont, /* complain_on_overflow */
1481 ppc64_elf_unhandled_reloc, /* special_function */
1482 "R_PPC64_DTPREL16_HIGHEST", /* name */
1483 FALSE, /* partial_inplace */
1484 0, /* src_mask */
1485 0xffff, /* dst_mask */
1486 FALSE), /* pcrel_offset */
1487
1488 /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */
1489 HOWTO (R_PPC64_DTPREL16_HIGHESTA,
1490 48, /* rightshift */
1491 1, /* size (0 = byte, 1 = short, 2 = long) */
1492 16, /* bitsize */
1493 FALSE, /* pc_relative */
1494 0, /* bitpos */
1495 complain_overflow_dont, /* complain_on_overflow */
1496 ppc64_elf_unhandled_reloc, /* special_function */
1497 "R_PPC64_DTPREL16_HIGHESTA", /* name */
1498 FALSE, /* partial_inplace */
1499 0, /* src_mask */
1500 0xffff, /* dst_mask */
1501 FALSE), /* pcrel_offset */
1502
1503 /* Like DTPREL16, but for insns with a DS field. */
1504 HOWTO (R_PPC64_DTPREL16_DS,
1505 0, /* rightshift */
1506 1, /* size (0 = byte, 1 = short, 2 = long) */
1507 16, /* bitsize */
1508 FALSE, /* pc_relative */
1509 0, /* bitpos */
1510 complain_overflow_signed, /* complain_on_overflow */
1511 ppc64_elf_unhandled_reloc, /* special_function */
1512 "R_PPC64_DTPREL16_DS", /* name */
1513 FALSE, /* partial_inplace */
1514 0, /* src_mask */
1515 0xfffc, /* dst_mask */
1516 FALSE), /* pcrel_offset */
1517
1518 /* Like DTPREL16_DS, but no overflow. */
1519 HOWTO (R_PPC64_DTPREL16_LO_DS,
1520 0, /* rightshift */
1521 1, /* size (0 = byte, 1 = short, 2 = long) */
1522 16, /* bitsize */
1523 FALSE, /* pc_relative */
1524 0, /* bitpos */
1525 complain_overflow_dont, /* complain_on_overflow */
1526 ppc64_elf_unhandled_reloc, /* special_function */
1527 "R_PPC64_DTPREL16_LO_DS", /* name */
1528 FALSE, /* partial_inplace */
1529 0, /* src_mask */
1530 0xfffc, /* dst_mask */
1531 FALSE), /* pcrel_offset */
1532
1533 /* Computes a tp-relative displacement, the difference between the value of
1534 sym+add and the value of the thread pointer (r13). */
1535 HOWTO (R_PPC64_TPREL64,
1536 0, /* rightshift */
1537 4, /* size (0 = byte, 1 = short, 2 = long) */
1538 64, /* bitsize */
1539 FALSE, /* pc_relative */
1540 0, /* bitpos */
1541 complain_overflow_dont, /* complain_on_overflow */
1542 ppc64_elf_unhandled_reloc, /* special_function */
1543 "R_PPC64_TPREL64", /* name */
1544 FALSE, /* partial_inplace */
1545 0, /* src_mask */
1546 ONES (64), /* dst_mask */
1547 FALSE), /* pcrel_offset */
1548
1549 /* A 16 bit tprel reloc. */
1550 HOWTO (R_PPC64_TPREL16,
1551 0, /* rightshift */
1552 1, /* size (0 = byte, 1 = short, 2 = long) */
1553 16, /* bitsize */
1554 FALSE, /* pc_relative */
1555 0, /* bitpos */
1556 complain_overflow_signed, /* complain_on_overflow */
1557 ppc64_elf_unhandled_reloc, /* special_function */
1558 "R_PPC64_TPREL16", /* name */
1559 FALSE, /* partial_inplace */
1560 0, /* src_mask */
1561 0xffff, /* dst_mask */
1562 FALSE), /* pcrel_offset */
1563
1564 /* Like TPREL16, but no overflow. */
1565 HOWTO (R_PPC64_TPREL16_LO,
1566 0, /* rightshift */
1567 1, /* size (0 = byte, 1 = short, 2 = long) */
1568 16, /* bitsize */
1569 FALSE, /* pc_relative */
1570 0, /* bitpos */
1571 complain_overflow_dont, /* complain_on_overflow */
1572 ppc64_elf_unhandled_reloc, /* special_function */
1573 "R_PPC64_TPREL16_LO", /* name */
1574 FALSE, /* partial_inplace */
1575 0, /* src_mask */
1576 0xffff, /* dst_mask */
1577 FALSE), /* pcrel_offset */
1578
1579 /* Like TPREL16_LO, but next higher group of 16 bits. */
1580 HOWTO (R_PPC64_TPREL16_HI,
1581 16, /* rightshift */
1582 1, /* size (0 = byte, 1 = short, 2 = long) */
1583 16, /* bitsize */
1584 FALSE, /* pc_relative */
1585 0, /* bitpos */
1586 complain_overflow_signed, /* complain_on_overflow */
1587 ppc64_elf_unhandled_reloc, /* special_function */
1588 "R_PPC64_TPREL16_HI", /* name */
1589 FALSE, /* partial_inplace */
1590 0, /* src_mask */
1591 0xffff, /* dst_mask */
1592 FALSE), /* pcrel_offset */
1593
1594 /* Like TPREL16_HI, but adjust for low 16 bits. */
1595 HOWTO (R_PPC64_TPREL16_HA,
1596 16, /* rightshift */
1597 1, /* size (0 = byte, 1 = short, 2 = long) */
1598 16, /* bitsize */
1599 FALSE, /* pc_relative */
1600 0, /* bitpos */
1601 complain_overflow_signed, /* complain_on_overflow */
1602 ppc64_elf_unhandled_reloc, /* special_function */
1603 "R_PPC64_TPREL16_HA", /* name */
1604 FALSE, /* partial_inplace */
1605 0, /* src_mask */
1606 0xffff, /* dst_mask */
1607 FALSE), /* pcrel_offset */
1608
1609 /* Like TPREL16_HI, but next higher group of 16 bits. */
1610 HOWTO (R_PPC64_TPREL16_HIGHER,
1611 32, /* rightshift */
1612 1, /* size (0 = byte, 1 = short, 2 = long) */
1613 16, /* bitsize */
1614 FALSE, /* pc_relative */
1615 0, /* bitpos */
1616 complain_overflow_dont, /* complain_on_overflow */
1617 ppc64_elf_unhandled_reloc, /* special_function */
1618 "R_PPC64_TPREL16_HIGHER", /* name */
1619 FALSE, /* partial_inplace */
1620 0, /* src_mask */
1621 0xffff, /* dst_mask */
1622 FALSE), /* pcrel_offset */
1623
1624 /* Like TPREL16_HIGHER, but adjust for low 16 bits. */
1625 HOWTO (R_PPC64_TPREL16_HIGHERA,
1626 32, /* rightshift */
1627 1, /* size (0 = byte, 1 = short, 2 = long) */
1628 16, /* bitsize */
1629 FALSE, /* pc_relative */
1630 0, /* bitpos */
1631 complain_overflow_dont, /* complain_on_overflow */
1632 ppc64_elf_unhandled_reloc, /* special_function */
1633 "R_PPC64_TPREL16_HIGHERA", /* name */
1634 FALSE, /* partial_inplace */
1635 0, /* src_mask */
1636 0xffff, /* dst_mask */
1637 FALSE), /* pcrel_offset */
1638
1639 /* Like TPREL16_HIGHER, but next higher group of 16 bits. */
1640 HOWTO (R_PPC64_TPREL16_HIGHEST,
1641 48, /* rightshift */
1642 1, /* size (0 = byte, 1 = short, 2 = long) */
1643 16, /* bitsize */
1644 FALSE, /* pc_relative */
1645 0, /* bitpos */
1646 complain_overflow_dont, /* complain_on_overflow */
1647 ppc64_elf_unhandled_reloc, /* special_function */
1648 "R_PPC64_TPREL16_HIGHEST", /* name */
1649 FALSE, /* partial_inplace */
1650 0, /* src_mask */
1651 0xffff, /* dst_mask */
1652 FALSE), /* pcrel_offset */
1653
1654 /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */
1655 HOWTO (R_PPC64_TPREL16_HIGHESTA,
1656 48, /* rightshift */
1657 1, /* size (0 = byte, 1 = short, 2 = long) */
1658 16, /* bitsize */
1659 FALSE, /* pc_relative */
1660 0, /* bitpos */
1661 complain_overflow_dont, /* complain_on_overflow */
1662 ppc64_elf_unhandled_reloc, /* special_function */
1663 "R_PPC64_TPREL16_HIGHESTA", /* name */
1664 FALSE, /* partial_inplace */
1665 0, /* src_mask */
1666 0xffff, /* dst_mask */
1667 FALSE), /* pcrel_offset */
1668
1669 /* Like TPREL16, but for insns with a DS field. */
1670 HOWTO (R_PPC64_TPREL16_DS,
1671 0, /* rightshift */
1672 1, /* size (0 = byte, 1 = short, 2 = long) */
1673 16, /* bitsize */
1674 FALSE, /* pc_relative */
1675 0, /* bitpos */
1676 complain_overflow_signed, /* complain_on_overflow */
1677 ppc64_elf_unhandled_reloc, /* special_function */
1678 "R_PPC64_TPREL16_DS", /* name */
1679 FALSE, /* partial_inplace */
1680 0, /* src_mask */
1681 0xfffc, /* dst_mask */
1682 FALSE), /* pcrel_offset */
1683
1684 /* Like TPREL16_DS, but no overflow. */
1685 HOWTO (R_PPC64_TPREL16_LO_DS,
1686 0, /* rightshift */
1687 1, /* size (0 = byte, 1 = short, 2 = long) */
1688 16, /* bitsize */
1689 FALSE, /* pc_relative */
1690 0, /* bitpos */
1691 complain_overflow_dont, /* complain_on_overflow */
1692 ppc64_elf_unhandled_reloc, /* special_function */
1693 "R_PPC64_TPREL16_LO_DS", /* name */
1694 FALSE, /* partial_inplace */
1695 0, /* src_mask */
1696 0xfffc, /* dst_mask */
1697 FALSE), /* pcrel_offset */
1698
1699 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1700 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1701 to the first entry relative to the TOC base (r2). */
1702 HOWTO (R_PPC64_GOT_TLSGD16,
1703 0, /* rightshift */
1704 1, /* size (0 = byte, 1 = short, 2 = long) */
1705 16, /* bitsize */
1706 FALSE, /* pc_relative */
1707 0, /* bitpos */
1708 complain_overflow_signed, /* complain_on_overflow */
1709 ppc64_elf_unhandled_reloc, /* special_function */
1710 "R_PPC64_GOT_TLSGD16", /* name */
1711 FALSE, /* partial_inplace */
1712 0, /* src_mask */
1713 0xffff, /* dst_mask */
1714 FALSE), /* pcrel_offset */
1715
1716 /* Like GOT_TLSGD16, but no overflow. */
1717 HOWTO (R_PPC64_GOT_TLSGD16_LO,
1718 0, /* rightshift */
1719 1, /* size (0 = byte, 1 = short, 2 = long) */
1720 16, /* bitsize */
1721 FALSE, /* pc_relative */
1722 0, /* bitpos */
1723 complain_overflow_dont, /* complain_on_overflow */
1724 ppc64_elf_unhandled_reloc, /* special_function */
1725 "R_PPC64_GOT_TLSGD16_LO", /* name */
1726 FALSE, /* partial_inplace */
1727 0, /* src_mask */
1728 0xffff, /* dst_mask */
1729 FALSE), /* pcrel_offset */
1730
1731 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1732 HOWTO (R_PPC64_GOT_TLSGD16_HI,
1733 16, /* rightshift */
1734 1, /* size (0 = byte, 1 = short, 2 = long) */
1735 16, /* bitsize */
1736 FALSE, /* pc_relative */
1737 0, /* bitpos */
1738 complain_overflow_signed, /* complain_on_overflow */
1739 ppc64_elf_unhandled_reloc, /* special_function */
1740 "R_PPC64_GOT_TLSGD16_HI", /* name */
1741 FALSE, /* partial_inplace */
1742 0, /* src_mask */
1743 0xffff, /* dst_mask */
1744 FALSE), /* pcrel_offset */
1745
1746 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1747 HOWTO (R_PPC64_GOT_TLSGD16_HA,
1748 16, /* rightshift */
1749 1, /* size (0 = byte, 1 = short, 2 = long) */
1750 16, /* bitsize */
1751 FALSE, /* pc_relative */
1752 0, /* bitpos */
1753 complain_overflow_signed, /* complain_on_overflow */
1754 ppc64_elf_unhandled_reloc, /* special_function */
1755 "R_PPC64_GOT_TLSGD16_HA", /* name */
1756 FALSE, /* partial_inplace */
1757 0, /* src_mask */
1758 0xffff, /* dst_mask */
1759 FALSE), /* pcrel_offset */
1760
1761 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1762 with values (sym+add)@dtpmod and zero, and computes the offset to the
1763 first entry relative to the TOC base (r2). */
1764 HOWTO (R_PPC64_GOT_TLSLD16,
1765 0, /* rightshift */
1766 1, /* size (0 = byte, 1 = short, 2 = long) */
1767 16, /* bitsize */
1768 FALSE, /* pc_relative */
1769 0, /* bitpos */
1770 complain_overflow_signed, /* complain_on_overflow */
1771 ppc64_elf_unhandled_reloc, /* special_function */
1772 "R_PPC64_GOT_TLSLD16", /* name */
1773 FALSE, /* partial_inplace */
1774 0, /* src_mask */
1775 0xffff, /* dst_mask */
1776 FALSE), /* pcrel_offset */
1777
1778 /* Like GOT_TLSLD16, but no overflow. */
1779 HOWTO (R_PPC64_GOT_TLSLD16_LO,
1780 0, /* rightshift */
1781 1, /* size (0 = byte, 1 = short, 2 = long) */
1782 16, /* bitsize */
1783 FALSE, /* pc_relative */
1784 0, /* bitpos */
1785 complain_overflow_dont, /* complain_on_overflow */
1786 ppc64_elf_unhandled_reloc, /* special_function */
1787 "R_PPC64_GOT_TLSLD16_LO", /* name */
1788 FALSE, /* partial_inplace */
1789 0, /* src_mask */
1790 0xffff, /* dst_mask */
1791 FALSE), /* pcrel_offset */
1792
1793 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1794 HOWTO (R_PPC64_GOT_TLSLD16_HI,
1795 16, /* rightshift */
1796 1, /* size (0 = byte, 1 = short, 2 = long) */
1797 16, /* bitsize */
1798 FALSE, /* pc_relative */
1799 0, /* bitpos */
1800 complain_overflow_signed, /* complain_on_overflow */
1801 ppc64_elf_unhandled_reloc, /* special_function */
1802 "R_PPC64_GOT_TLSLD16_HI", /* name */
1803 FALSE, /* partial_inplace */
1804 0, /* src_mask */
1805 0xffff, /* dst_mask */
1806 FALSE), /* pcrel_offset */
1807
1808 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1809 HOWTO (R_PPC64_GOT_TLSLD16_HA,
1810 16, /* rightshift */
1811 1, /* size (0 = byte, 1 = short, 2 = long) */
1812 16, /* bitsize */
1813 FALSE, /* pc_relative */
1814 0, /* bitpos */
1815 complain_overflow_signed, /* complain_on_overflow */
1816 ppc64_elf_unhandled_reloc, /* special_function */
1817 "R_PPC64_GOT_TLSLD16_HA", /* name */
1818 FALSE, /* partial_inplace */
1819 0, /* src_mask */
1820 0xffff, /* dst_mask */
1821 FALSE), /* pcrel_offset */
1822
1823 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1824 the offset to the entry relative to the TOC base (r2). */
1825 HOWTO (R_PPC64_GOT_DTPREL16_DS,
1826 0, /* rightshift */
1827 1, /* size (0 = byte, 1 = short, 2 = long) */
1828 16, /* bitsize */
1829 FALSE, /* pc_relative */
1830 0, /* bitpos */
1831 complain_overflow_signed, /* complain_on_overflow */
1832 ppc64_elf_unhandled_reloc, /* special_function */
1833 "R_PPC64_GOT_DTPREL16_DS", /* name */
1834 FALSE, /* partial_inplace */
1835 0, /* src_mask */
1836 0xfffc, /* dst_mask */
1837 FALSE), /* pcrel_offset */
1838
1839 /* Like GOT_DTPREL16_DS, but no overflow. */
1840 HOWTO (R_PPC64_GOT_DTPREL16_LO_DS,
1841 0, /* rightshift */
1842 1, /* size (0 = byte, 1 = short, 2 = long) */
1843 16, /* bitsize */
1844 FALSE, /* pc_relative */
1845 0, /* bitpos */
1846 complain_overflow_dont, /* complain_on_overflow */
1847 ppc64_elf_unhandled_reloc, /* special_function */
1848 "R_PPC64_GOT_DTPREL16_LO_DS", /* name */
1849 FALSE, /* partial_inplace */
1850 0, /* src_mask */
1851 0xfffc, /* dst_mask */
1852 FALSE), /* pcrel_offset */
1853
1854 /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */
1855 HOWTO (R_PPC64_GOT_DTPREL16_HI,
1856 16, /* rightshift */
1857 1, /* size (0 = byte, 1 = short, 2 = long) */
1858 16, /* bitsize */
1859 FALSE, /* pc_relative */
1860 0, /* bitpos */
1861 complain_overflow_signed, /* complain_on_overflow */
1862 ppc64_elf_unhandled_reloc, /* special_function */
1863 "R_PPC64_GOT_DTPREL16_HI", /* name */
1864 FALSE, /* partial_inplace */
1865 0, /* src_mask */
1866 0xffff, /* dst_mask */
1867 FALSE), /* pcrel_offset */
1868
1869 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1870 HOWTO (R_PPC64_GOT_DTPREL16_HA,
1871 16, /* rightshift */
1872 1, /* size (0 = byte, 1 = short, 2 = long) */
1873 16, /* bitsize */
1874 FALSE, /* pc_relative */
1875 0, /* bitpos */
1876 complain_overflow_signed, /* complain_on_overflow */
1877 ppc64_elf_unhandled_reloc, /* special_function */
1878 "R_PPC64_GOT_DTPREL16_HA", /* name */
1879 FALSE, /* partial_inplace */
1880 0, /* src_mask */
1881 0xffff, /* dst_mask */
1882 FALSE), /* pcrel_offset */
1883
1884 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1885 offset to the entry relative to the TOC base (r2). */
1886 HOWTO (R_PPC64_GOT_TPREL16_DS,
1887 0, /* rightshift */
1888 1, /* size (0 = byte, 1 = short, 2 = long) */
1889 16, /* bitsize */
1890 FALSE, /* pc_relative */
1891 0, /* bitpos */
1892 complain_overflow_signed, /* complain_on_overflow */
1893 ppc64_elf_unhandled_reloc, /* special_function */
1894 "R_PPC64_GOT_TPREL16_DS", /* name */
1895 FALSE, /* partial_inplace */
1896 0, /* src_mask */
1897 0xfffc, /* dst_mask */
1898 FALSE), /* pcrel_offset */
1899
1900 /* Like GOT_TPREL16_DS, but no overflow. */
1901 HOWTO (R_PPC64_GOT_TPREL16_LO_DS,
1902 0, /* rightshift */
1903 1, /* size (0 = byte, 1 = short, 2 = long) */
1904 16, /* bitsize */
1905 FALSE, /* pc_relative */
1906 0, /* bitpos */
1907 complain_overflow_dont, /* complain_on_overflow */
1908 ppc64_elf_unhandled_reloc, /* special_function */
1909 "R_PPC64_GOT_TPREL16_LO_DS", /* name */
1910 FALSE, /* partial_inplace */
1911 0, /* src_mask */
1912 0xfffc, /* dst_mask */
1913 FALSE), /* pcrel_offset */
1914
1915 /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */
1916 HOWTO (R_PPC64_GOT_TPREL16_HI,
1917 16, /* rightshift */
1918 1, /* size (0 = byte, 1 = short, 2 = long) */
1919 16, /* bitsize */
1920 FALSE, /* pc_relative */
1921 0, /* bitpos */
1922 complain_overflow_signed, /* complain_on_overflow */
1923 ppc64_elf_unhandled_reloc, /* special_function */
1924 "R_PPC64_GOT_TPREL16_HI", /* name */
1925 FALSE, /* partial_inplace */
1926 0, /* src_mask */
1927 0xffff, /* dst_mask */
1928 FALSE), /* pcrel_offset */
1929
1930 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1931 HOWTO (R_PPC64_GOT_TPREL16_HA,
1932 16, /* rightshift */
1933 1, /* size (0 = byte, 1 = short, 2 = long) */
1934 16, /* bitsize */
1935 FALSE, /* pc_relative */
1936 0, /* bitpos */
1937 complain_overflow_signed, /* complain_on_overflow */
1938 ppc64_elf_unhandled_reloc, /* special_function */
1939 "R_PPC64_GOT_TPREL16_HA", /* name */
1940 FALSE, /* partial_inplace */
1941 0, /* src_mask */
1942 0xffff, /* dst_mask */
1943 FALSE), /* pcrel_offset */
1944
1945 HOWTO (R_PPC64_JMP_IREL, /* type */
1946 0, /* rightshift */
1947 0, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1948 0, /* bitsize */
1949 FALSE, /* pc_relative */
1950 0, /* bitpos */
1951 complain_overflow_dont, /* complain_on_overflow */
1952 ppc64_elf_unhandled_reloc, /* special_function */
1953 "R_PPC64_JMP_IREL", /* name */
1954 FALSE, /* partial_inplace */
1955 0, /* src_mask */
1956 0, /* dst_mask */
1957 FALSE), /* pcrel_offset */
1958
1959 HOWTO (R_PPC64_IRELATIVE, /* type */
1960 0, /* rightshift */
1961 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1962 64, /* bitsize */
1963 FALSE, /* pc_relative */
1964 0, /* bitpos */
1965 complain_overflow_dont, /* complain_on_overflow */
1966 bfd_elf_generic_reloc, /* special_function */
1967 "R_PPC64_IRELATIVE", /* name */
1968 FALSE, /* partial_inplace */
1969 0, /* src_mask */
1970 ONES (64), /* dst_mask */
1971 FALSE), /* pcrel_offset */
1972
1973 /* A 16 bit relative relocation. */
1974 HOWTO (R_PPC64_REL16, /* type */
1975 0, /* rightshift */
1976 1, /* size (0 = byte, 1 = short, 2 = long) */
1977 16, /* bitsize */
1978 TRUE, /* pc_relative */
1979 0, /* bitpos */
1980 complain_overflow_signed, /* complain_on_overflow */
1981 bfd_elf_generic_reloc, /* special_function */
1982 "R_PPC64_REL16", /* name */
1983 FALSE, /* partial_inplace */
1984 0, /* src_mask */
1985 0xffff, /* dst_mask */
1986 TRUE), /* pcrel_offset */
1987
1988 /* A 16 bit relative relocation without overflow. */
1989 HOWTO (R_PPC64_REL16_LO, /* type */
1990 0, /* rightshift */
1991 1, /* size (0 = byte, 1 = short, 2 = long) */
1992 16, /* bitsize */
1993 TRUE, /* pc_relative */
1994 0, /* bitpos */
1995 complain_overflow_dont,/* complain_on_overflow */
1996 bfd_elf_generic_reloc, /* special_function */
1997 "R_PPC64_REL16_LO", /* name */
1998 FALSE, /* partial_inplace */
1999 0, /* src_mask */
2000 0xffff, /* dst_mask */
2001 TRUE), /* pcrel_offset */
2002
2003 /* The high order 16 bits of a relative address. */
2004 HOWTO (R_PPC64_REL16_HI, /* type */
2005 16, /* rightshift */
2006 1, /* size (0 = byte, 1 = short, 2 = long) */
2007 16, /* bitsize */
2008 TRUE, /* pc_relative */
2009 0, /* bitpos */
2010 complain_overflow_signed, /* complain_on_overflow */
2011 bfd_elf_generic_reloc, /* special_function */
2012 "R_PPC64_REL16_HI", /* name */
2013 FALSE, /* partial_inplace */
2014 0, /* src_mask */
2015 0xffff, /* dst_mask */
2016 TRUE), /* pcrel_offset */
2017
2018 /* The high order 16 bits of a relative address, plus 1 if the contents of
2019 the low 16 bits, treated as a signed number, is negative. */
2020 HOWTO (R_PPC64_REL16_HA, /* type */
2021 16, /* rightshift */
2022 1, /* size (0 = byte, 1 = short, 2 = long) */
2023 16, /* bitsize */
2024 TRUE, /* pc_relative */
2025 0, /* bitpos */
2026 complain_overflow_signed, /* complain_on_overflow */
2027 ppc64_elf_ha_reloc, /* special_function */
2028 "R_PPC64_REL16_HA", /* name */
2029 FALSE, /* partial_inplace */
2030 0, /* src_mask */
2031 0xffff, /* dst_mask */
2032 TRUE), /* pcrel_offset */
2033
2034 /* Like R_PPC64_REL16_HA but for split field in addpcis. */
2035 HOWTO (R_PPC64_REL16DX_HA, /* type */
2036 16, /* rightshift */
2037 2, /* size (0 = byte, 1 = short, 2 = long) */
2038 16, /* bitsize */
2039 TRUE, /* pc_relative */
2040 0, /* bitpos */
2041 complain_overflow_signed, /* complain_on_overflow */
2042 ppc64_elf_ha_reloc, /* special_function */
2043 "R_PPC64_REL16DX_HA", /* name */
2044 FALSE, /* partial_inplace */
2045 0, /* src_mask */
2046 0x1fffc1, /* dst_mask */
2047 TRUE), /* pcrel_offset */
2048
2049 /* A split-field reloc for addpcis, non-relative (gas internal use only). */
2050 HOWTO (R_PPC64_16DX_HA, /* type */
2051 16, /* rightshift */
2052 2, /* size (0 = byte, 1 = short, 2 = long) */
2053 16, /* bitsize */
2054 FALSE, /* pc_relative */
2055 0, /* bitpos */
2056 complain_overflow_signed, /* complain_on_overflow */
2057 ppc64_elf_ha_reloc, /* special_function */
2058 "R_PPC64_16DX_HA", /* name */
2059 FALSE, /* partial_inplace */
2060 0, /* src_mask */
2061 0x1fffc1, /* dst_mask */
2062 FALSE), /* pcrel_offset */
2063
2064 /* Like R_PPC64_ADDR16_HI, but no overflow. */
2065 HOWTO (R_PPC64_ADDR16_HIGH, /* type */
2066 16, /* rightshift */
2067 1, /* size (0 = byte, 1 = short, 2 = long) */
2068 16, /* bitsize */
2069 FALSE, /* pc_relative */
2070 0, /* bitpos */
2071 complain_overflow_dont, /* complain_on_overflow */
2072 bfd_elf_generic_reloc, /* special_function */
2073 "R_PPC64_ADDR16_HIGH", /* name */
2074 FALSE, /* partial_inplace */
2075 0, /* src_mask */
2076 0xffff, /* dst_mask */
2077 FALSE), /* pcrel_offset */
2078
2079 /* Like R_PPC64_ADDR16_HA, but no overflow. */
2080 HOWTO (R_PPC64_ADDR16_HIGHA, /* type */
2081 16, /* rightshift */
2082 1, /* size (0 = byte, 1 = short, 2 = long) */
2083 16, /* bitsize */
2084 FALSE, /* pc_relative */
2085 0, /* bitpos */
2086 complain_overflow_dont, /* complain_on_overflow */
2087 ppc64_elf_ha_reloc, /* special_function */
2088 "R_PPC64_ADDR16_HIGHA", /* name */
2089 FALSE, /* partial_inplace */
2090 0, /* src_mask */
2091 0xffff, /* dst_mask */
2092 FALSE), /* pcrel_offset */
2093
2094 /* Like R_PPC64_DTPREL16_HI, but no overflow. */
2095 HOWTO (R_PPC64_DTPREL16_HIGH,
2096 16, /* rightshift */
2097 1, /* size (0 = byte, 1 = short, 2 = long) */
2098 16, /* bitsize */
2099 FALSE, /* pc_relative */
2100 0, /* bitpos */
2101 complain_overflow_dont, /* complain_on_overflow */
2102 ppc64_elf_unhandled_reloc, /* special_function */
2103 "R_PPC64_DTPREL16_HIGH", /* name */
2104 FALSE, /* partial_inplace */
2105 0, /* src_mask */
2106 0xffff, /* dst_mask */
2107 FALSE), /* pcrel_offset */
2108
2109 /* Like R_PPC64_DTPREL16_HA, but no overflow. */
2110 HOWTO (R_PPC64_DTPREL16_HIGHA,
2111 16, /* rightshift */
2112 1, /* size (0 = byte, 1 = short, 2 = long) */
2113 16, /* bitsize */
2114 FALSE, /* pc_relative */
2115 0, /* bitpos */
2116 complain_overflow_dont, /* complain_on_overflow */
2117 ppc64_elf_unhandled_reloc, /* special_function */
2118 "R_PPC64_DTPREL16_HIGHA", /* name */
2119 FALSE, /* partial_inplace */
2120 0, /* src_mask */
2121 0xffff, /* dst_mask */
2122 FALSE), /* pcrel_offset */
2123
2124 /* Like R_PPC64_TPREL16_HI, but no overflow. */
2125 HOWTO (R_PPC64_TPREL16_HIGH,
2126 16, /* rightshift */
2127 1, /* size (0 = byte, 1 = short, 2 = long) */
2128 16, /* bitsize */
2129 FALSE, /* pc_relative */
2130 0, /* bitpos */
2131 complain_overflow_dont, /* complain_on_overflow */
2132 ppc64_elf_unhandled_reloc, /* special_function */
2133 "R_PPC64_TPREL16_HIGH", /* name */
2134 FALSE, /* partial_inplace */
2135 0, /* src_mask */
2136 0xffff, /* dst_mask */
2137 FALSE), /* pcrel_offset */
2138
2139 /* Like R_PPC64_TPREL16_HA, but no overflow. */
2140 HOWTO (R_PPC64_TPREL16_HIGHA,
2141 16, /* rightshift */
2142 1, /* size (0 = byte, 1 = short, 2 = long) */
2143 16, /* bitsize */
2144 FALSE, /* pc_relative */
2145 0, /* bitpos */
2146 complain_overflow_dont, /* complain_on_overflow */
2147 ppc64_elf_unhandled_reloc, /* special_function */
2148 "R_PPC64_TPREL16_HIGHA", /* name */
2149 FALSE, /* partial_inplace */
2150 0, /* src_mask */
2151 0xffff, /* dst_mask */
2152 FALSE), /* pcrel_offset */
2153
2154 /* Marker reloc on ELFv2 large-model function entry. */
2155 HOWTO (R_PPC64_ENTRY,
2156 0, /* rightshift */
2157 2, /* size (0 = byte, 1 = short, 2 = long) */
2158 32, /* bitsize */
2159 FALSE, /* pc_relative */
2160 0, /* bitpos */
2161 complain_overflow_dont, /* complain_on_overflow */
2162 bfd_elf_generic_reloc, /* special_function */
2163 "R_PPC64_ENTRY", /* name */
2164 FALSE, /* partial_inplace */
2165 0, /* src_mask */
2166 0, /* dst_mask */
2167 FALSE), /* pcrel_offset */
2168
2169 /* Like ADDR64, but use local entry point of function. */
2170 HOWTO (R_PPC64_ADDR64_LOCAL, /* type */
2171 0, /* rightshift */
2172 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
2173 64, /* bitsize */
2174 FALSE, /* pc_relative */
2175 0, /* bitpos */
2176 complain_overflow_dont, /* complain_on_overflow */
2177 bfd_elf_generic_reloc, /* special_function */
2178 "R_PPC64_ADDR64_LOCAL", /* name */
2179 FALSE, /* partial_inplace */
2180 0, /* src_mask */
2181 ONES (64), /* dst_mask */
2182 FALSE), /* pcrel_offset */
2183
2184 /* GNU extension to record C++ vtable hierarchy. */
2185 HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
2186 0, /* rightshift */
2187 0, /* size (0 = byte, 1 = short, 2 = long) */
2188 0, /* bitsize */
2189 FALSE, /* pc_relative */
2190 0, /* bitpos */
2191 complain_overflow_dont, /* complain_on_overflow */
2192 NULL, /* special_function */
2193 "R_PPC64_GNU_VTINHERIT", /* name */
2194 FALSE, /* partial_inplace */
2195 0, /* src_mask */
2196 0, /* dst_mask */
2197 FALSE), /* pcrel_offset */
2198
2199 /* GNU extension to record C++ vtable member usage. */
2200 HOWTO (R_PPC64_GNU_VTENTRY, /* type */
2201 0, /* rightshift */
2202 0, /* size (0 = byte, 1 = short, 2 = long) */
2203 0, /* bitsize */
2204 FALSE, /* pc_relative */
2205 0, /* bitpos */
2206 complain_overflow_dont, /* complain_on_overflow */
2207 NULL, /* special_function */
2208 "R_PPC64_GNU_VTENTRY", /* name */
2209 FALSE, /* partial_inplace */
2210 0, /* src_mask */
2211 0, /* dst_mask */
2212 FALSE), /* pcrel_offset */
2213 };
2214
2215 \f
2216 /* Initialize the ppc64_elf_howto_table, so that linear accesses can
2217 be done. */
2218
2219 static void
2220 ppc_howto_init (void)
2221 {
2222 unsigned int i, type;
2223
2224 for (i = 0; i < ARRAY_SIZE (ppc64_elf_howto_raw); i++)
2225 {
2226 type = ppc64_elf_howto_raw[i].type;
2227 BFD_ASSERT (type < ARRAY_SIZE (ppc64_elf_howto_table));
2228 ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
2229 }
2230 }
2231
2232 static reloc_howto_type *
2233 ppc64_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2234 bfd_reloc_code_real_type code)
2235 {
2236 enum elf_ppc64_reloc_type r = R_PPC64_NONE;
2237
2238 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2239 /* Initialize howto table if needed. */
2240 ppc_howto_init ();
2241
2242 switch (code)
2243 {
2244 default:
2245 return NULL;
2246
2247 case BFD_RELOC_NONE: r = R_PPC64_NONE;
2248 break;
2249 case BFD_RELOC_32: r = R_PPC64_ADDR32;
2250 break;
2251 case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24;
2252 break;
2253 case BFD_RELOC_16: r = R_PPC64_ADDR16;
2254 break;
2255 case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO;
2256 break;
2257 case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI;
2258 break;
2259 case BFD_RELOC_PPC64_ADDR16_HIGH: r = R_PPC64_ADDR16_HIGH;
2260 break;
2261 case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA;
2262 break;
2263 case BFD_RELOC_PPC64_ADDR16_HIGHA: r = R_PPC64_ADDR16_HIGHA;
2264 break;
2265 case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14;
2266 break;
2267 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN;
2268 break;
2269 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN;
2270 break;
2271 case BFD_RELOC_PPC_B26: r = R_PPC64_REL24;
2272 break;
2273 case BFD_RELOC_PPC_B16: r = R_PPC64_REL14;
2274 break;
2275 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN;
2276 break;
2277 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN;
2278 break;
2279 case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16;
2280 break;
2281 case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO;
2282 break;
2283 case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI;
2284 break;
2285 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA;
2286 break;
2287 case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY;
2288 break;
2289 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT;
2290 break;
2291 case BFD_RELOC_32_PCREL: r = R_PPC64_REL32;
2292 break;
2293 case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32;
2294 break;
2295 case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32;
2296 break;
2297 case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO;
2298 break;
2299 case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI;
2300 break;
2301 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA;
2302 break;
2303 case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF;
2304 break;
2305 case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO;
2306 break;
2307 case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI;
2308 break;
2309 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA;
2310 break;
2311 case BFD_RELOC_CTOR: r = R_PPC64_ADDR64;
2312 break;
2313 case BFD_RELOC_64: r = R_PPC64_ADDR64;
2314 break;
2315 case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER;
2316 break;
2317 case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA;
2318 break;
2319 case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST;
2320 break;
2321 case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA;
2322 break;
2323 case BFD_RELOC_64_PCREL: r = R_PPC64_REL64;
2324 break;
2325 case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64;
2326 break;
2327 case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64;
2328 break;
2329 case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16;
2330 break;
2331 case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO;
2332 break;
2333 case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI;
2334 break;
2335 case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA;
2336 break;
2337 case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC;
2338 break;
2339 case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16;
2340 break;
2341 case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO;
2342 break;
2343 case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI;
2344 break;
2345 case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA;
2346 break;
2347 case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS;
2348 break;
2349 case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS;
2350 break;
2351 case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS;
2352 break;
2353 case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS;
2354 break;
2355 case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS;
2356 break;
2357 case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS;
2358 break;
2359 case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS;
2360 break;
2361 case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS;
2362 break;
2363 case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS;
2364 break;
2365 case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS;
2366 break;
2367 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS;
2368 break;
2369 case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS;
2370 break;
2371 case BFD_RELOC_PPC_TLSGD: r = R_PPC64_TLSGD;
2372 break;
2373 case BFD_RELOC_PPC_TLSLD: r = R_PPC64_TLSLD;
2374 break;
2375 case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64;
2376 break;
2377 case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16;
2378 break;
2379 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO;
2380 break;
2381 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI;
2382 break;
2383 case BFD_RELOC_PPC64_TPREL16_HIGH: r = R_PPC64_TPREL16_HIGH;
2384 break;
2385 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA;
2386 break;
2387 case BFD_RELOC_PPC64_TPREL16_HIGHA: r = R_PPC64_TPREL16_HIGHA;
2388 break;
2389 case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64;
2390 break;
2391 case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16;
2392 break;
2393 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO;
2394 break;
2395 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI;
2396 break;
2397 case BFD_RELOC_PPC64_DTPREL16_HIGH: r = R_PPC64_DTPREL16_HIGH;
2398 break;
2399 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA;
2400 break;
2401 case BFD_RELOC_PPC64_DTPREL16_HIGHA: r = R_PPC64_DTPREL16_HIGHA;
2402 break;
2403 case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64;
2404 break;
2405 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16;
2406 break;
2407 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO;
2408 break;
2409 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI;
2410 break;
2411 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA;
2412 break;
2413 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16;
2414 break;
2415 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO;
2416 break;
2417 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI;
2418 break;
2419 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA;
2420 break;
2421 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS;
2422 break;
2423 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS;
2424 break;
2425 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI;
2426 break;
2427 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA;
2428 break;
2429 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS;
2430 break;
2431 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS;
2432 break;
2433 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI;
2434 break;
2435 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA;
2436 break;
2437 case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS;
2438 break;
2439 case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS;
2440 break;
2441 case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER;
2442 break;
2443 case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA;
2444 break;
2445 case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST;
2446 break;
2447 case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA;
2448 break;
2449 case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS;
2450 break;
2451 case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS;
2452 break;
2453 case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER;
2454 break;
2455 case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA;
2456 break;
2457 case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST;
2458 break;
2459 case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA;
2460 break;
2461 case BFD_RELOC_16_PCREL: r = R_PPC64_REL16;
2462 break;
2463 case BFD_RELOC_LO16_PCREL: r = R_PPC64_REL16_LO;
2464 break;
2465 case BFD_RELOC_HI16_PCREL: r = R_PPC64_REL16_HI;
2466 break;
2467 case BFD_RELOC_HI16_S_PCREL: r = R_PPC64_REL16_HA;
2468 break;
2469 case BFD_RELOC_PPC_16DX_HA: r = R_PPC64_16DX_HA;
2470 break;
2471 case BFD_RELOC_PPC_REL16DX_HA: r = R_PPC64_REL16DX_HA;
2472 break;
2473 case BFD_RELOC_PPC64_ENTRY: r = R_PPC64_ENTRY;
2474 break;
2475 case BFD_RELOC_PPC64_ADDR64_LOCAL: r = R_PPC64_ADDR64_LOCAL;
2476 break;
2477 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT;
2478 break;
2479 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY;
2480 break;
2481 }
2482
2483 return ppc64_elf_howto_table[r];
2484 };
2485
2486 static reloc_howto_type *
2487 ppc64_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2488 const char *r_name)
2489 {
2490 unsigned int i;
2491
2492 for (i = 0; i < ARRAY_SIZE (ppc64_elf_howto_raw); i++)
2493 if (ppc64_elf_howto_raw[i].name != NULL
2494 && strcasecmp (ppc64_elf_howto_raw[i].name, r_name) == 0)
2495 return &ppc64_elf_howto_raw[i];
2496
2497 return NULL;
2498 }
2499
2500 /* Set the howto pointer for a PowerPC ELF reloc. */
2501
2502 static void
2503 ppc64_elf_info_to_howto (bfd *abfd, arelent *cache_ptr,
2504 Elf_Internal_Rela *dst)
2505 {
2506 unsigned int type;
2507
2508 /* Initialize howto table if needed. */
2509 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2510 ppc_howto_init ();
2511
2512 type = ELF64_R_TYPE (dst->r_info);
2513 if (type >= ARRAY_SIZE (ppc64_elf_howto_table))
2514 {
2515 /* xgettext:c-format */
2516 _bfd_error_handler (_("%B: invalid relocation type %d"),
2517 abfd, (int) type);
2518 type = R_PPC64_NONE;
2519 }
2520 cache_ptr->howto = ppc64_elf_howto_table[type];
2521 }
2522
2523 /* Handle the R_PPC64_ADDR16_HA and similar relocs. */
2524
2525 static bfd_reloc_status_type
2526 ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2527 void *data, asection *input_section,
2528 bfd *output_bfd, char **error_message)
2529 {
2530 enum elf_ppc64_reloc_type r_type;
2531 long insn;
2532 bfd_size_type octets;
2533 bfd_vma value;
2534
2535 /* If this is a relocatable link (output_bfd test tells us), just
2536 call the generic function. Any adjustment will be done at final
2537 link time. */
2538 if (output_bfd != NULL)
2539 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2540 input_section, output_bfd, error_message);
2541
2542 /* Adjust the addend for sign extension of the low 16 bits.
2543 We won't actually be using the low 16 bits, so trashing them
2544 doesn't matter. */
2545 reloc_entry->addend += 0x8000;
2546 r_type = reloc_entry->howto->type;
2547 if (r_type != R_PPC64_REL16DX_HA)
2548 return bfd_reloc_continue;
2549
2550 value = 0;
2551 if (!bfd_is_com_section (symbol->section))
2552 value = symbol->value;
2553 value += (reloc_entry->addend
2554 + symbol->section->output_offset
2555 + symbol->section->output_section->vma);
2556 value -= (reloc_entry->address
2557 + input_section->output_offset
2558 + input_section->output_section->vma);
2559 value = (bfd_signed_vma) value >> 16;
2560
2561 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2562 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2563 insn &= ~0x1fffc1;
2564 insn |= (value & 0xffc1) | ((value & 0x3e) << 15);
2565 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2566 if (value + 0x8000 > 0xffff)
2567 return bfd_reloc_overflow;
2568 return bfd_reloc_ok;
2569 }
2570
2571 static bfd_reloc_status_type
2572 ppc64_elf_branch_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2573 void *data, asection *input_section,
2574 bfd *output_bfd, char **error_message)
2575 {
2576 if (output_bfd != NULL)
2577 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2578 input_section, output_bfd, error_message);
2579
2580 if (strcmp (symbol->section->name, ".opd") == 0
2581 && (symbol->section->owner->flags & DYNAMIC) == 0)
2582 {
2583 bfd_vma dest = opd_entry_value (symbol->section,
2584 symbol->value + reloc_entry->addend,
2585 NULL, NULL, FALSE);
2586 if (dest != (bfd_vma) -1)
2587 reloc_entry->addend = dest - (symbol->value
2588 + symbol->section->output_section->vma
2589 + symbol->section->output_offset);
2590 }
2591 else
2592 {
2593 elf_symbol_type *elfsym = (elf_symbol_type *) symbol;
2594
2595 if (symbol->section->owner != abfd
2596 && symbol->section->owner != NULL
2597 && abiversion (symbol->section->owner) >= 2)
2598 {
2599 unsigned int i;
2600
2601 for (i = 0; i < symbol->section->owner->symcount; ++i)
2602 {
2603 asymbol *symdef = symbol->section->owner->outsymbols[i];
2604
2605 if (strcmp (symdef->name, symbol->name) == 0)
2606 {
2607 elfsym = (elf_symbol_type *) symdef;
2608 break;
2609 }
2610 }
2611 }
2612 reloc_entry->addend
2613 += PPC64_LOCAL_ENTRY_OFFSET (elfsym->internal_elf_sym.st_other);
2614 }
2615 return bfd_reloc_continue;
2616 }
2617
2618 static bfd_reloc_status_type
2619 ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2620 void *data, asection *input_section,
2621 bfd *output_bfd, char **error_message)
2622 {
2623 long insn;
2624 enum elf_ppc64_reloc_type r_type;
2625 bfd_size_type octets;
2626 /* Assume 'at' branch hints. */
2627 bfd_boolean is_isa_v2 = TRUE;
2628
2629 /* If this is a relocatable link (output_bfd test tells us), just
2630 call the generic function. Any adjustment will be done at final
2631 link time. */
2632 if (output_bfd != NULL)
2633 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2634 input_section, output_bfd, error_message);
2635
2636 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2637 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2638 insn &= ~(0x01 << 21);
2639 r_type = reloc_entry->howto->type;
2640 if (r_type == R_PPC64_ADDR14_BRTAKEN
2641 || r_type == R_PPC64_REL14_BRTAKEN)
2642 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
2643
2644 if (is_isa_v2)
2645 {
2646 /* Set 'a' bit. This is 0b00010 in BO field for branch
2647 on CR(BI) insns (BO == 001at or 011at), and 0b01000
2648 for branch on CTR insns (BO == 1a00t or 1a01t). */
2649 if ((insn & (0x14 << 21)) == (0x04 << 21))
2650 insn |= 0x02 << 21;
2651 else if ((insn & (0x14 << 21)) == (0x10 << 21))
2652 insn |= 0x08 << 21;
2653 else
2654 goto out;
2655 }
2656 else
2657 {
2658 bfd_vma target = 0;
2659 bfd_vma from;
2660
2661 if (!bfd_is_com_section (symbol->section))
2662 target = symbol->value;
2663 target += symbol->section->output_section->vma;
2664 target += symbol->section->output_offset;
2665 target += reloc_entry->addend;
2666
2667 from = (reloc_entry->address
2668 + input_section->output_offset
2669 + input_section->output_section->vma);
2670
2671 /* Invert 'y' bit if not the default. */
2672 if ((bfd_signed_vma) (target - from) < 0)
2673 insn ^= 0x01 << 21;
2674 }
2675 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2676 out:
2677 return ppc64_elf_branch_reloc (abfd, reloc_entry, symbol, data,
2678 input_section, output_bfd, error_message);
2679 }
2680
2681 static bfd_reloc_status_type
2682 ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2683 void *data, asection *input_section,
2684 bfd *output_bfd, char **error_message)
2685 {
2686 /* If this is a relocatable link (output_bfd test tells us), just
2687 call the generic function. Any adjustment will be done at final
2688 link time. */
2689 if (output_bfd != NULL)
2690 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2691 input_section, output_bfd, error_message);
2692
2693 /* Subtract the symbol section base address. */
2694 reloc_entry->addend -= symbol->section->output_section->vma;
2695 return bfd_reloc_continue;
2696 }
2697
2698 static bfd_reloc_status_type
2699 ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2700 void *data, asection *input_section,
2701 bfd *output_bfd, char **error_message)
2702 {
2703 /* If this is a relocatable link (output_bfd test tells us), just
2704 call the generic function. Any adjustment will be done at final
2705 link time. */
2706 if (output_bfd != NULL)
2707 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2708 input_section, output_bfd, error_message);
2709
2710 /* Subtract the symbol section base address. */
2711 reloc_entry->addend -= symbol->section->output_section->vma;
2712
2713 /* Adjust the addend for sign extension of the low 16 bits. */
2714 reloc_entry->addend += 0x8000;
2715 return bfd_reloc_continue;
2716 }
2717
2718 static bfd_reloc_status_type
2719 ppc64_elf_toc_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 return bfd_reloc_continue;
2739 }
2740
2741 static bfd_reloc_status_type
2742 ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2743 void *data, asection *input_section,
2744 bfd *output_bfd, char **error_message)
2745 {
2746 bfd_vma TOCstart;
2747
2748 /* If this is a relocatable link (output_bfd test tells us), just
2749 call the generic function. Any adjustment will be done at final
2750 link time. */
2751 if (output_bfd != NULL)
2752 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2753 input_section, output_bfd, error_message);
2754
2755 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2756 if (TOCstart == 0)
2757 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2758
2759 /* Subtract the TOC base address. */
2760 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2761
2762 /* Adjust the addend for sign extension of the low 16 bits. */
2763 reloc_entry->addend += 0x8000;
2764 return bfd_reloc_continue;
2765 }
2766
2767 static bfd_reloc_status_type
2768 ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2769 void *data, asection *input_section,
2770 bfd *output_bfd, char **error_message)
2771 {
2772 bfd_vma TOCstart;
2773 bfd_size_type octets;
2774
2775 /* If this is a relocatable link (output_bfd test tells us), just
2776 call the generic function. Any adjustment will be done at final
2777 link time. */
2778 if (output_bfd != NULL)
2779 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2780 input_section, output_bfd, error_message);
2781
2782 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2783 if (TOCstart == 0)
2784 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2785
2786 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2787 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
2788 return bfd_reloc_ok;
2789 }
2790
2791 static bfd_reloc_status_type
2792 ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2793 void *data, asection *input_section,
2794 bfd *output_bfd, char **error_message)
2795 {
2796 /* If this is a relocatable link (output_bfd test tells us), just
2797 call the generic function. Any adjustment will be done at final
2798 link time. */
2799 if (output_bfd != NULL)
2800 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2801 input_section, output_bfd, error_message);
2802
2803 if (error_message != NULL)
2804 {
2805 static char buf[60];
2806 sprintf (buf, "generic linker can't handle %s",
2807 reloc_entry->howto->name);
2808 *error_message = buf;
2809 }
2810 return bfd_reloc_dangerous;
2811 }
2812
2813 /* Track GOT entries needed for a given symbol. We might need more
2814 than one got entry per symbol. */
2815 struct got_entry
2816 {
2817 struct got_entry *next;
2818
2819 /* The symbol addend that we'll be placing in the GOT. */
2820 bfd_vma addend;
2821
2822 /* Unlike other ELF targets, we use separate GOT entries for the same
2823 symbol referenced from different input files. This is to support
2824 automatic multiple TOC/GOT sections, where the TOC base can vary
2825 from one input file to another. After partitioning into TOC groups
2826 we merge entries within the group.
2827
2828 Point to the BFD owning this GOT entry. */
2829 bfd *owner;
2830
2831 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
2832 TLS_TPREL or TLS_DTPREL for tls entries. */
2833 unsigned char tls_type;
2834
2835 /* Non-zero if got.ent points to real entry. */
2836 unsigned char is_indirect;
2837
2838 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
2839 union
2840 {
2841 bfd_signed_vma refcount;
2842 bfd_vma offset;
2843 struct got_entry *ent;
2844 } got;
2845 };
2846
2847 /* The same for PLT. */
2848 struct plt_entry
2849 {
2850 struct plt_entry *next;
2851
2852 bfd_vma addend;
2853
2854 union
2855 {
2856 bfd_signed_vma refcount;
2857 bfd_vma offset;
2858 } plt;
2859 };
2860
2861 struct ppc64_elf_obj_tdata
2862 {
2863 struct elf_obj_tdata elf;
2864
2865 /* Shortcuts to dynamic linker sections. */
2866 asection *got;
2867 asection *relgot;
2868
2869 /* Used during garbage collection. We attach global symbols defined
2870 on removed .opd entries to this section so that the sym is removed. */
2871 asection *deleted_section;
2872
2873 /* TLS local dynamic got entry handling. Support for multiple GOT
2874 sections means we potentially need one of these for each input bfd. */
2875 struct got_entry tlsld_got;
2876
2877 union {
2878 /* A copy of relocs before they are modified for --emit-relocs. */
2879 Elf_Internal_Rela *relocs;
2880
2881 /* Section contents. */
2882 bfd_byte *contents;
2883 } opd;
2884
2885 /* Nonzero if this bfd has small toc/got relocs, ie. that expect
2886 the reloc to be in the range -32768 to 32767. */
2887 unsigned int has_small_toc_reloc : 1;
2888
2889 /* Set if toc/got ha relocs detected not using r2, or lo reloc
2890 instruction not one we handle. */
2891 unsigned int unexpected_toc_insn : 1;
2892 };
2893
2894 #define ppc64_elf_tdata(bfd) \
2895 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
2896
2897 #define ppc64_tlsld_got(bfd) \
2898 (&ppc64_elf_tdata (bfd)->tlsld_got)
2899
2900 #define is_ppc64_elf(bfd) \
2901 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2902 && elf_object_id (bfd) == PPC64_ELF_DATA)
2903
2904 /* Override the generic function because we store some extras. */
2905
2906 static bfd_boolean
2907 ppc64_elf_mkobject (bfd *abfd)
2908 {
2909 return bfd_elf_allocate_object (abfd, sizeof (struct ppc64_elf_obj_tdata),
2910 PPC64_ELF_DATA);
2911 }
2912
2913 /* Fix bad default arch selected for a 64 bit input bfd when the
2914 default is 32 bit. Also select arch based on apuinfo. */
2915
2916 static bfd_boolean
2917 ppc64_elf_object_p (bfd *abfd)
2918 {
2919 if (!abfd->arch_info->the_default)
2920 return TRUE;
2921
2922 if (abfd->arch_info->bits_per_word == 32)
2923 {
2924 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2925
2926 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2927 {
2928 /* Relies on arch after 32 bit default being 64 bit default. */
2929 abfd->arch_info = abfd->arch_info->next;
2930 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2931 }
2932 }
2933 return _bfd_elf_ppc_set_arch (abfd);
2934 }
2935
2936 /* Support for core dump NOTE sections. */
2937
2938 static bfd_boolean
2939 ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2940 {
2941 size_t offset, size;
2942
2943 if (note->descsz != 504)
2944 return FALSE;
2945
2946 /* pr_cursig */
2947 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
2948
2949 /* pr_pid */
2950 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 32);
2951
2952 /* pr_reg */
2953 offset = 112;
2954 size = 384;
2955
2956 /* Make a ".reg/999" section. */
2957 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2958 size, note->descpos + offset);
2959 }
2960
2961 static bfd_boolean
2962 ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2963 {
2964 if (note->descsz != 136)
2965 return FALSE;
2966
2967 elf_tdata (abfd)->core->pid
2968 = bfd_get_32 (abfd, note->descdata + 24);
2969 elf_tdata (abfd)->core->program
2970 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
2971 elf_tdata (abfd)->core->command
2972 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
2973
2974 return TRUE;
2975 }
2976
2977 static char *
2978 ppc64_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type,
2979 ...)
2980 {
2981 switch (note_type)
2982 {
2983 default:
2984 return NULL;
2985
2986 case NT_PRPSINFO:
2987 {
2988 char data[136];
2989 va_list ap;
2990
2991 va_start (ap, note_type);
2992 memset (data, 0, sizeof (data));
2993 strncpy (data + 40, va_arg (ap, const char *), 16);
2994 strncpy (data + 56, va_arg (ap, const char *), 80);
2995 va_end (ap);
2996 return elfcore_write_note (abfd, buf, bufsiz,
2997 "CORE", note_type, data, sizeof (data));
2998 }
2999
3000 case NT_PRSTATUS:
3001 {
3002 char data[504];
3003 va_list ap;
3004 long pid;
3005 int cursig;
3006 const void *greg;
3007
3008 va_start (ap, note_type);
3009 memset (data, 0, 112);
3010 pid = va_arg (ap, long);
3011 bfd_put_32 (abfd, pid, data + 32);
3012 cursig = va_arg (ap, int);
3013 bfd_put_16 (abfd, cursig, data + 12);
3014 greg = va_arg (ap, const void *);
3015 memcpy (data + 112, greg, 384);
3016 memset (data + 496, 0, 8);
3017 va_end (ap);
3018 return elfcore_write_note (abfd, buf, bufsiz,
3019 "CORE", note_type, data, sizeof (data));
3020 }
3021 }
3022 }
3023
3024 /* Add extra PPC sections. */
3025
3026 static const struct bfd_elf_special_section ppc64_elf_special_sections[]=
3027 {
3028 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, 0 },
3029 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
3030 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
3031 { STRING_COMMA_LEN (".toc"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
3032 { STRING_COMMA_LEN (".toc1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
3033 { STRING_COMMA_LEN (".tocbss"), 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
3034 { NULL, 0, 0, 0, 0 }
3035 };
3036
3037 enum _ppc64_sec_type {
3038 sec_normal = 0,
3039 sec_opd = 1,
3040 sec_toc = 2
3041 };
3042
3043 struct _ppc64_elf_section_data
3044 {
3045 struct bfd_elf_section_data elf;
3046
3047 union
3048 {
3049 /* An array with one entry for each opd function descriptor,
3050 and some spares since opd entries may be either 16 or 24 bytes. */
3051 #define OPD_NDX(OFF) ((OFF) >> 4)
3052 struct _opd_sec_data
3053 {
3054 /* Points to the function code section for local opd entries. */
3055 asection **func_sec;
3056
3057 /* After editing .opd, adjust references to opd local syms. */
3058 long *adjust;
3059 } opd;
3060
3061 /* An array for toc sections, indexed by offset/8. */
3062 struct _toc_sec_data
3063 {
3064 /* Specifies the relocation symbol index used at a given toc offset. */
3065 unsigned *symndx;
3066
3067 /* And the relocation addend. */
3068 bfd_vma *add;
3069 } toc;
3070 } u;
3071
3072 enum _ppc64_sec_type sec_type:2;
3073
3074 /* Flag set when small branches are detected. Used to
3075 select suitable defaults for the stub group size. */
3076 unsigned int has_14bit_branch:1;
3077 };
3078
3079 #define ppc64_elf_section_data(sec) \
3080 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
3081
3082 static bfd_boolean
3083 ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
3084 {
3085 if (!sec->used_by_bfd)
3086 {
3087 struct _ppc64_elf_section_data *sdata;
3088 bfd_size_type amt = sizeof (*sdata);
3089
3090 sdata = bfd_zalloc (abfd, amt);
3091 if (sdata == NULL)
3092 return FALSE;
3093 sec->used_by_bfd = sdata;
3094 }
3095
3096 return _bfd_elf_new_section_hook (abfd, sec);
3097 }
3098
3099 static struct _opd_sec_data *
3100 get_opd_info (asection * sec)
3101 {
3102 if (sec != NULL
3103 && ppc64_elf_section_data (sec) != NULL
3104 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
3105 return &ppc64_elf_section_data (sec)->u.opd;
3106 return NULL;
3107 }
3108 \f
3109 /* Parameters for the qsort hook. */
3110 static bfd_boolean synthetic_relocatable;
3111 static asection *synthetic_opd;
3112
3113 /* qsort comparison function for ppc64_elf_get_synthetic_symtab. */
3114
3115 static int
3116 compare_symbols (const void *ap, const void *bp)
3117 {
3118 const asymbol *a = * (const asymbol **) ap;
3119 const asymbol *b = * (const asymbol **) bp;
3120
3121 /* Section symbols first. */
3122 if ((a->flags & BSF_SECTION_SYM) && !(b->flags & BSF_SECTION_SYM))
3123 return -1;
3124 if (!(a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM))
3125 return 1;
3126
3127 /* then .opd symbols. */
3128 if (synthetic_opd != NULL)
3129 {
3130 if (strcmp (a->section->name, ".opd") == 0
3131 && strcmp (b->section->name, ".opd") != 0)
3132 return -1;
3133 if (strcmp (a->section->name, ".opd") != 0
3134 && strcmp (b->section->name, ".opd") == 0)
3135 return 1;
3136 }
3137
3138 /* then other code symbols. */
3139 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3140 == (SEC_CODE | SEC_ALLOC)
3141 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3142 != (SEC_CODE | SEC_ALLOC))
3143 return -1;
3144
3145 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3146 != (SEC_CODE | SEC_ALLOC)
3147 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3148 == (SEC_CODE | SEC_ALLOC))
3149 return 1;
3150
3151 if (synthetic_relocatable)
3152 {
3153 if (a->section->id < b->section->id)
3154 return -1;
3155
3156 if (a->section->id > b->section->id)
3157 return 1;
3158 }
3159
3160 if (a->value + a->section->vma < b->value + b->section->vma)
3161 return -1;
3162
3163 if (a->value + a->section->vma > b->value + b->section->vma)
3164 return 1;
3165
3166 /* For syms with the same value, prefer strong dynamic global function
3167 syms over other syms. */
3168 if ((a->flags & BSF_GLOBAL) != 0 && (b->flags & BSF_GLOBAL) == 0)
3169 return -1;
3170
3171 if ((a->flags & BSF_GLOBAL) == 0 && (b->flags & BSF_GLOBAL) != 0)
3172 return 1;
3173
3174 if ((a->flags & BSF_FUNCTION) != 0 && (b->flags & BSF_FUNCTION) == 0)
3175 return -1;
3176
3177 if ((a->flags & BSF_FUNCTION) == 0 && (b->flags & BSF_FUNCTION) != 0)
3178 return 1;
3179
3180 if ((a->flags & BSF_WEAK) == 0 && (b->flags & BSF_WEAK) != 0)
3181 return -1;
3182
3183 if ((a->flags & BSF_WEAK) != 0 && (b->flags & BSF_WEAK) == 0)
3184 return 1;
3185
3186 if ((a->flags & BSF_DYNAMIC) != 0 && (b->flags & BSF_DYNAMIC) == 0)
3187 return -1;
3188
3189 if ((a->flags & BSF_DYNAMIC) == 0 && (b->flags & BSF_DYNAMIC) != 0)
3190 return 1;
3191
3192 return a > b;
3193 }
3194
3195 /* Search SYMS for a symbol of the given VALUE. */
3196
3197 static asymbol *
3198 sym_exists_at (asymbol **syms, long lo, long hi, unsigned int id, bfd_vma value)
3199 {
3200 long mid;
3201
3202 if (id == (unsigned) -1)
3203 {
3204 while (lo < hi)
3205 {
3206 mid = (lo + hi) >> 1;
3207 if (syms[mid]->value + syms[mid]->section->vma < value)
3208 lo = mid + 1;
3209 else if (syms[mid]->value + syms[mid]->section->vma > value)
3210 hi = mid;
3211 else
3212 return syms[mid];
3213 }
3214 }
3215 else
3216 {
3217 while (lo < hi)
3218 {
3219 mid = (lo + hi) >> 1;
3220 if (syms[mid]->section->id < id)
3221 lo = mid + 1;
3222 else if (syms[mid]->section->id > id)
3223 hi = mid;
3224 else if (syms[mid]->value < value)
3225 lo = mid + 1;
3226 else if (syms[mid]->value > value)
3227 hi = mid;
3228 else
3229 return syms[mid];
3230 }
3231 }
3232 return NULL;
3233 }
3234
3235 static bfd_boolean
3236 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
3237 {
3238 bfd_vma vma = *(bfd_vma *) ptr;
3239 return ((section->flags & SEC_ALLOC) != 0
3240 && section->vma <= vma
3241 && vma < section->vma + section->size);
3242 }
3243
3244 /* Create synthetic symbols, effectively restoring "dot-symbol" function
3245 entry syms. Also generate @plt symbols for the glink branch table.
3246 Returns count of synthetic symbols in RET or -1 on error. */
3247
3248 static long
3249 ppc64_elf_get_synthetic_symtab (bfd *abfd,
3250 long static_count, asymbol **static_syms,
3251 long dyn_count, asymbol **dyn_syms,
3252 asymbol **ret)
3253 {
3254 asymbol *s;
3255 long i;
3256 long count;
3257 char *names;
3258 long symcount, codesecsym, codesecsymend, secsymend, opdsymend;
3259 asection *opd = NULL;
3260 bfd_boolean relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0;
3261 asymbol **syms;
3262 int abi = abiversion (abfd);
3263
3264 *ret = NULL;
3265
3266 if (abi < 2)
3267 {
3268 opd = bfd_get_section_by_name (abfd, ".opd");
3269 if (opd == NULL && abi == 1)
3270 return 0;
3271 }
3272
3273 syms = NULL;
3274 codesecsym = 0;
3275 codesecsymend = 0;
3276 secsymend = 0;
3277 opdsymend = 0;
3278 symcount = 0;
3279 if (opd != NULL)
3280 {
3281 symcount = static_count;
3282 if (!relocatable)
3283 symcount += dyn_count;
3284 if (symcount == 0)
3285 return 0;
3286
3287 syms = bfd_malloc ((symcount + 1) * sizeof (*syms));
3288 if (syms == NULL)
3289 return -1;
3290
3291 if (!relocatable && static_count != 0 && dyn_count != 0)
3292 {
3293 /* Use both symbol tables. */
3294 memcpy (syms, static_syms, static_count * sizeof (*syms));
3295 memcpy (syms + static_count, dyn_syms,
3296 (dyn_count + 1) * sizeof (*syms));
3297 }
3298 else if (!relocatable && static_count == 0)
3299 memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms));
3300 else
3301 memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms));
3302
3303 synthetic_relocatable = relocatable;
3304 synthetic_opd = opd;
3305 qsort (syms, symcount, sizeof (*syms), compare_symbols);
3306
3307 if (!relocatable && symcount > 1)
3308 {
3309 long j;
3310 /* Trim duplicate syms, since we may have merged the normal and
3311 dynamic symbols. Actually, we only care about syms that have
3312 different values, so trim any with the same value. */
3313 for (i = 1, j = 1; i < symcount; ++i)
3314 if (syms[i - 1]->value + syms[i - 1]->section->vma
3315 != syms[i]->value + syms[i]->section->vma)
3316 syms[j++] = syms[i];
3317 symcount = j;
3318 }
3319
3320 i = 0;
3321 /* Note that here and in compare_symbols we can't compare opd and
3322 sym->section directly. With separate debug info files, the
3323 symbols will be extracted from the debug file while abfd passed
3324 to this function is the real binary. */
3325 if (opd != NULL && strcmp (syms[i]->section->name, ".opd") == 0)
3326 ++i;
3327 codesecsym = i;
3328
3329 for (; i < symcount; ++i)
3330 if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC
3331 | SEC_THREAD_LOCAL))
3332 != (SEC_CODE | SEC_ALLOC))
3333 || (syms[i]->flags & BSF_SECTION_SYM) == 0)
3334 break;
3335 codesecsymend = i;
3336
3337 for (; i < symcount; ++i)
3338 if ((syms[i]->flags & BSF_SECTION_SYM) == 0)
3339 break;
3340 secsymend = i;
3341
3342 for (; i < symcount; ++i)
3343 if (strcmp (syms[i]->section->name, ".opd") != 0)
3344 break;
3345 opdsymend = i;
3346
3347 for (; i < symcount; ++i)
3348 if ((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3349 != (SEC_CODE | SEC_ALLOC))
3350 break;
3351 symcount = i;
3352 }
3353 count = 0;
3354
3355 if (relocatable)
3356 {
3357 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3358 arelent *r;
3359 size_t size;
3360 long relcount;
3361
3362 if (opdsymend == secsymend)
3363 goto done;
3364
3365 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3366 relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0;
3367 if (relcount == 0)
3368 goto done;
3369
3370 if (!(*slurp_relocs) (abfd, opd, static_syms, FALSE))
3371 {
3372 count = -1;
3373 goto done;
3374 }
3375
3376 size = 0;
3377 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3378 {
3379 asymbol *sym;
3380
3381 while (r < opd->relocation + relcount
3382 && r->address < syms[i]->value + opd->vma)
3383 ++r;
3384
3385 if (r == opd->relocation + relcount)
3386 break;
3387
3388 if (r->address != syms[i]->value + opd->vma)
3389 continue;
3390
3391 if (r->howto->type != R_PPC64_ADDR64)
3392 continue;
3393
3394 sym = *r->sym_ptr_ptr;
3395 if (!sym_exists_at (syms, opdsymend, symcount,
3396 sym->section->id, sym->value + r->addend))
3397 {
3398 ++count;
3399 size += sizeof (asymbol);
3400 size += strlen (syms[i]->name) + 2;
3401 }
3402 }
3403
3404 if (size == 0)
3405 goto done;
3406 s = *ret = bfd_malloc (size);
3407 if (s == NULL)
3408 {
3409 count = -1;
3410 goto done;
3411 }
3412
3413 names = (char *) (s + count);
3414
3415 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3416 {
3417 asymbol *sym;
3418
3419 while (r < opd->relocation + relcount
3420 && r->address < syms[i]->value + opd->vma)
3421 ++r;
3422
3423 if (r == opd->relocation + relcount)
3424 break;
3425
3426 if (r->address != syms[i]->value + opd->vma)
3427 continue;
3428
3429 if (r->howto->type != R_PPC64_ADDR64)
3430 continue;
3431
3432 sym = *r->sym_ptr_ptr;
3433 if (!sym_exists_at (syms, opdsymend, symcount,
3434 sym->section->id, sym->value + r->addend))
3435 {
3436 size_t len;
3437
3438 *s = *syms[i];
3439 s->flags |= BSF_SYNTHETIC;
3440 s->section = sym->section;
3441 s->value = sym->value + r->addend;
3442 s->name = names;
3443 *names++ = '.';
3444 len = strlen (syms[i]->name);
3445 memcpy (names, syms[i]->name, len + 1);
3446 names += len + 1;
3447 /* Have udata.p point back to the original symbol this
3448 synthetic symbol was derived from. */
3449 s->udata.p = syms[i];
3450 s++;
3451 }
3452 }
3453 }
3454 else
3455 {
3456 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3457 bfd_byte *contents = NULL;
3458 size_t size;
3459 long plt_count = 0;
3460 bfd_vma glink_vma = 0, resolv_vma = 0;
3461 asection *dynamic, *glink = NULL, *relplt = NULL;
3462 arelent *p;
3463
3464 if (opd != NULL && !bfd_malloc_and_get_section (abfd, opd, &contents))
3465 {
3466 free_contents_and_exit_err:
3467 count = -1;
3468 free_contents_and_exit:
3469 if (contents)
3470 free (contents);
3471 goto done;
3472 }
3473
3474 size = 0;
3475 for (i = secsymend; i < opdsymend; ++i)
3476 {
3477 bfd_vma ent;
3478
3479 /* Ignore bogus symbols. */
3480 if (syms[i]->value > opd->size - 8)
3481 continue;
3482
3483 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3484 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3485 {
3486 ++count;
3487 size += sizeof (asymbol);
3488 size += strlen (syms[i]->name) + 2;
3489 }
3490 }
3491
3492 /* Get start of .glink stubs from DT_PPC64_GLINK. */
3493 if (dyn_count != 0
3494 && (dynamic = bfd_get_section_by_name (abfd, ".dynamic")) != NULL)
3495 {
3496 bfd_byte *dynbuf, *extdyn, *extdynend;
3497 size_t extdynsize;
3498 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
3499
3500 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
3501 goto free_contents_and_exit_err;
3502
3503 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
3504 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
3505
3506 extdyn = dynbuf;
3507 extdynend = extdyn + dynamic->size;
3508 for (; extdyn < extdynend; extdyn += extdynsize)
3509 {
3510 Elf_Internal_Dyn dyn;
3511 (*swap_dyn_in) (abfd, extdyn, &dyn);
3512
3513 if (dyn.d_tag == DT_NULL)
3514 break;
3515
3516 if (dyn.d_tag == DT_PPC64_GLINK)
3517 {
3518 /* The first glink stub starts at offset 32; see
3519 comment in ppc64_elf_finish_dynamic_sections. */
3520 glink_vma = dyn.d_un.d_val + GLINK_CALL_STUB_SIZE - 8 * 4;
3521 /* The .glink section usually does not survive the final
3522 link; search for the section (usually .text) where the
3523 glink stubs now reside. */
3524 glink = bfd_sections_find_if (abfd, section_covers_vma,
3525 &glink_vma);
3526 break;
3527 }
3528 }
3529
3530 free (dynbuf);
3531 }
3532
3533 if (glink != NULL)
3534 {
3535 /* Determine __glink trampoline by reading the relative branch
3536 from the first glink stub. */
3537 bfd_byte buf[4];
3538 unsigned int off = 0;
3539
3540 while (bfd_get_section_contents (abfd, glink, buf,
3541 glink_vma + off - glink->vma, 4))
3542 {
3543 unsigned int insn = bfd_get_32 (abfd, buf);
3544 insn ^= B_DOT;
3545 if ((insn & ~0x3fffffc) == 0)
3546 {
3547 resolv_vma = glink_vma + off + (insn ^ 0x2000000) - 0x2000000;
3548 break;
3549 }
3550 off += 4;
3551 if (off > 4)
3552 break;
3553 }
3554
3555 if (resolv_vma)
3556 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
3557
3558 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
3559 if (relplt != NULL)
3560 {
3561 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3562 if (! (*slurp_relocs) (abfd, relplt, dyn_syms, TRUE))
3563 goto free_contents_and_exit_err;
3564
3565 plt_count = relplt->size / sizeof (Elf64_External_Rela);
3566 size += plt_count * sizeof (asymbol);
3567
3568 p = relplt->relocation;
3569 for (i = 0; i < plt_count; i++, p++)
3570 {
3571 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
3572 if (p->addend != 0)
3573 size += sizeof ("+0x") - 1 + 16;
3574 }
3575 }
3576 }
3577
3578 if (size == 0)
3579 goto free_contents_and_exit;
3580 s = *ret = bfd_malloc (size);
3581 if (s == NULL)
3582 goto free_contents_and_exit_err;
3583
3584 names = (char *) (s + count + plt_count + (resolv_vma != 0));
3585
3586 for (i = secsymend; i < opdsymend; ++i)
3587 {
3588 bfd_vma ent;
3589
3590 if (syms[i]->value > opd->size - 8)
3591 continue;
3592
3593 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3594 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3595 {
3596 long lo, hi;
3597 size_t len;
3598 asection *sec = abfd->sections;
3599
3600 *s = *syms[i];
3601 lo = codesecsym;
3602 hi = codesecsymend;
3603 while (lo < hi)
3604 {
3605 long mid = (lo + hi) >> 1;
3606 if (syms[mid]->section->vma < ent)
3607 lo = mid + 1;
3608 else if (syms[mid]->section->vma > ent)
3609 hi = mid;
3610 else
3611 {
3612 sec = syms[mid]->section;
3613 break;
3614 }
3615 }
3616
3617 if (lo >= hi && lo > codesecsym)
3618 sec = syms[lo - 1]->section;
3619
3620 for (; sec != NULL; sec = sec->next)
3621 {
3622 if (sec->vma > ent)
3623 break;
3624 /* SEC_LOAD may not be set if SEC is from a separate debug
3625 info file. */
3626 if ((sec->flags & SEC_ALLOC) == 0)
3627 break;
3628 if ((sec->flags & SEC_CODE) != 0)
3629 s->section = sec;
3630 }
3631 s->flags |= BSF_SYNTHETIC;
3632 s->value = ent - s->section->vma;
3633 s->name = names;
3634 *names++ = '.';
3635 len = strlen (syms[i]->name);
3636 memcpy (names, syms[i]->name, len + 1);
3637 names += len + 1;
3638 /* Have udata.p point back to the original symbol this
3639 synthetic symbol was derived from. */
3640 s->udata.p = syms[i];
3641 s++;
3642 }
3643 }
3644 free (contents);
3645
3646 if (glink != NULL && relplt != NULL)
3647 {
3648 if (resolv_vma)
3649 {
3650 /* Add a symbol for the main glink trampoline. */
3651 memset (s, 0, sizeof *s);
3652 s->the_bfd = abfd;
3653 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3654 s->section = glink;
3655 s->value = resolv_vma - glink->vma;
3656 s->name = names;
3657 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3658 names += sizeof ("__glink_PLTresolve");
3659 s++;
3660 count++;
3661 }
3662
3663 /* FIXME: It would be very much nicer to put sym@plt on the
3664 stub rather than on the glink branch table entry. The
3665 objdump disassembler would then use a sensible symbol
3666 name on plt calls. The difficulty in doing so is
3667 a) finding the stubs, and,
3668 b) matching stubs against plt entries, and,
3669 c) there can be multiple stubs for a given plt entry.
3670
3671 Solving (a) could be done by code scanning, but older
3672 ppc64 binaries used different stubs to current code.
3673 (b) is the tricky one since you need to known the toc
3674 pointer for at least one function that uses a pic stub to
3675 be able to calculate the plt address referenced.
3676 (c) means gdb would need to set multiple breakpoints (or
3677 find the glink branch itself) when setting breakpoints
3678 for pending shared library loads. */
3679 p = relplt->relocation;
3680 for (i = 0; i < plt_count; i++, p++)
3681 {
3682 size_t len;
3683
3684 *s = **p->sym_ptr_ptr;
3685 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
3686 we are defining a symbol, ensure one of them is set. */
3687 if ((s->flags & BSF_LOCAL) == 0)
3688 s->flags |= BSF_GLOBAL;
3689 s->flags |= BSF_SYNTHETIC;
3690 s->section = glink;
3691 s->value = glink_vma - glink->vma;
3692 s->name = names;
3693 s->udata.p = NULL;
3694 len = strlen ((*p->sym_ptr_ptr)->name);
3695 memcpy (names, (*p->sym_ptr_ptr)->name, len);
3696 names += len;
3697 if (p->addend != 0)
3698 {
3699 memcpy (names, "+0x", sizeof ("+0x") - 1);
3700 names += sizeof ("+0x") - 1;
3701 bfd_sprintf_vma (abfd, names, p->addend);
3702 names += strlen (names);
3703 }
3704 memcpy (names, "@plt", sizeof ("@plt"));
3705 names += sizeof ("@plt");
3706 s++;
3707 if (abi < 2)
3708 {
3709 glink_vma += 8;
3710 if (i >= 0x8000)
3711 glink_vma += 4;
3712 }
3713 else
3714 glink_vma += 4;
3715 }
3716 count += plt_count;
3717 }
3718 }
3719
3720 done:
3721 free (syms);
3722 return count;
3723 }
3724 \f
3725 /* The following functions are specific to the ELF linker, while
3726 functions above are used generally. Those named ppc64_elf_* are
3727 called by the main ELF linker code. They appear in this file more
3728 or less in the order in which they are called. eg.
3729 ppc64_elf_check_relocs is called early in the link process,
3730 ppc64_elf_finish_dynamic_sections is one of the last functions
3731 called.
3732
3733 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
3734 functions have both a function code symbol and a function descriptor
3735 symbol. A call to foo in a relocatable object file looks like:
3736
3737 . .text
3738 . x:
3739 . bl .foo
3740 . nop
3741
3742 The function definition in another object file might be:
3743
3744 . .section .opd
3745 . foo: .quad .foo
3746 . .quad .TOC.@tocbase
3747 . .quad 0
3748 .
3749 . .text
3750 . .foo: blr
3751
3752 When the linker resolves the call during a static link, the branch
3753 unsurprisingly just goes to .foo and the .opd information is unused.
3754 If the function definition is in a shared library, things are a little
3755 different: The call goes via a plt call stub, the opd information gets
3756 copied to the plt, and the linker patches the nop.
3757
3758 . x:
3759 . bl .foo_stub
3760 . ld 2,40(1)
3761 .
3762 .
3763 . .foo_stub:
3764 . std 2,40(1) # in practice, the call stub
3765 . addis 11,2,Lfoo@toc@ha # is slightly optimized, but
3766 . addi 11,11,Lfoo@toc@l # this is the general idea
3767 . ld 12,0(11)
3768 . ld 2,8(11)
3769 . mtctr 12
3770 . ld 11,16(11)
3771 . bctr
3772 .
3773 . .section .plt
3774 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
3775
3776 The "reloc ()" notation is supposed to indicate that the linker emits
3777 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
3778 copying.
3779
3780 What are the difficulties here? Well, firstly, the relocations
3781 examined by the linker in check_relocs are against the function code
3782 sym .foo, while the dynamic relocation in the plt is emitted against
3783 the function descriptor symbol, foo. Somewhere along the line, we need
3784 to carefully copy dynamic link information from one symbol to the other.
3785 Secondly, the generic part of the elf linker will make .foo a dynamic
3786 symbol as is normal for most other backends. We need foo dynamic
3787 instead, at least for an application final link. However, when
3788 creating a shared library containing foo, we need to have both symbols
3789 dynamic so that references to .foo are satisfied during the early
3790 stages of linking. Otherwise the linker might decide to pull in a
3791 definition from some other object, eg. a static library.
3792
3793 Update: As of August 2004, we support a new convention. Function
3794 calls may use the function descriptor symbol, ie. "bl foo". This
3795 behaves exactly as "bl .foo". */
3796
3797 /* Of those relocs that might be copied as dynamic relocs, this
3798 function selects those that must be copied when linking a shared
3799 library or PIE, even when the symbol is local. */
3800
3801 static int
3802 must_be_dyn_reloc (struct bfd_link_info *info,
3803 enum elf_ppc64_reloc_type r_type)
3804 {
3805 switch (r_type)
3806 {
3807 default:
3808 /* Only relative relocs can be resolved when the object load
3809 address isn't fixed. DTPREL64 is excluded because the
3810 dynamic linker needs to differentiate global dynamic from
3811 local dynamic __tls_index pairs when PPC64_OPT_TLS is set. */
3812 return 1;
3813
3814 case R_PPC64_REL32:
3815 case R_PPC64_REL64:
3816 case R_PPC64_REL30:
3817 return 0;
3818
3819 case R_PPC64_TPREL16:
3820 case R_PPC64_TPREL16_LO:
3821 case R_PPC64_TPREL16_HI:
3822 case R_PPC64_TPREL16_HA:
3823 case R_PPC64_TPREL16_DS:
3824 case R_PPC64_TPREL16_LO_DS:
3825 case R_PPC64_TPREL16_HIGH:
3826 case R_PPC64_TPREL16_HIGHA:
3827 case R_PPC64_TPREL16_HIGHER:
3828 case R_PPC64_TPREL16_HIGHERA:
3829 case R_PPC64_TPREL16_HIGHEST:
3830 case R_PPC64_TPREL16_HIGHESTA:
3831 case R_PPC64_TPREL64:
3832 /* These relocations are relative but in a shared library the
3833 linker doesn't know the thread pointer base. */
3834 return bfd_link_dll (info);
3835 }
3836 }
3837
3838 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3839 copying dynamic variables from a shared lib into an app's dynbss
3840 section, and instead use a dynamic relocation to point into the
3841 shared lib. With code that gcc generates, it's vital that this be
3842 enabled; In the PowerPC64 ABI, the address of a function is actually
3843 the address of a function descriptor, which resides in the .opd
3844 section. gcc uses the descriptor directly rather than going via the
3845 GOT as some other ABI's do, which means that initialized function
3846 pointers must reference the descriptor. Thus, a function pointer
3847 initialized to the address of a function in a shared library will
3848 either require a copy reloc, or a dynamic reloc. Using a copy reloc
3849 redefines the function descriptor symbol to point to the copy. This
3850 presents a problem as a plt entry for that function is also
3851 initialized from the function descriptor symbol and the copy reloc
3852 may not be initialized first. */
3853 #define ELIMINATE_COPY_RELOCS 1
3854
3855 /* Section name for stubs is the associated section name plus this
3856 string. */
3857 #define STUB_SUFFIX ".stub"
3858
3859 /* Linker stubs.
3860 ppc_stub_long_branch:
3861 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
3862 destination, but a 24 bit branch in a stub section will reach.
3863 . b dest
3864
3865 ppc_stub_plt_branch:
3866 Similar to the above, but a 24 bit branch in the stub section won't
3867 reach its destination.
3868 . addis %r11,%r2,xxx@toc@ha
3869 . ld %r12,xxx@toc@l(%r11)
3870 . mtctr %r12
3871 . bctr
3872
3873 ppc_stub_plt_call:
3874 Used to call a function in a shared library. If it so happens that
3875 the plt entry referenced crosses a 64k boundary, then an extra
3876 "addi %r11,%r11,xxx@toc@l" will be inserted before the "mtctr".
3877 . std %r2,40(%r1)
3878 . addis %r11,%r2,xxx@toc@ha
3879 . ld %r12,xxx+0@toc@l(%r11)
3880 . mtctr %r12
3881 . ld %r2,xxx+8@toc@l(%r11)
3882 . ld %r11,xxx+16@toc@l(%r11)
3883 . bctr
3884
3885 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
3886 code to adjust the value and save r2 to support multiple toc sections.
3887 A ppc_stub_long_branch with an r2 offset looks like:
3888 . std %r2,40(%r1)
3889 . addis %r2,%r2,off@ha
3890 . addi %r2,%r2,off@l
3891 . b dest
3892
3893 A ppc_stub_plt_branch with an r2 offset looks like:
3894 . std %r2,40(%r1)
3895 . addis %r11,%r2,xxx@toc@ha
3896 . ld %r12,xxx@toc@l(%r11)
3897 . addis %r2,%r2,off@ha
3898 . addi %r2,%r2,off@l
3899 . mtctr %r12
3900 . bctr
3901
3902 In cases where the "addis" instruction would add zero, the "addis" is
3903 omitted and following instructions modified slightly in some cases.
3904 */
3905
3906 enum ppc_stub_type {
3907 ppc_stub_none,
3908 ppc_stub_long_branch,
3909 ppc_stub_long_branch_r2off,
3910 ppc_stub_plt_branch,
3911 ppc_stub_plt_branch_r2off,
3912 ppc_stub_plt_call,
3913 ppc_stub_plt_call_r2save,
3914 ppc_stub_global_entry,
3915 ppc_stub_save_res
3916 };
3917
3918 /* Information on stub grouping. */
3919 struct map_stub
3920 {
3921 /* The stub section. */
3922 asection *stub_sec;
3923 /* This is the section to which stubs in the group will be attached. */
3924 asection *link_sec;
3925 /* Next group. */
3926 struct map_stub *next;
3927 /* Whether to emit a copy of register save/restore functions in this
3928 group. */
3929 int needs_save_res;
3930 /* The offset of the __tls_get_addr_opt plt stub bctrl in this group,
3931 or -1u if no such stub with bctrl exists. */
3932 unsigned int tls_get_addr_opt_bctrl;
3933 };
3934
3935 struct ppc_stub_hash_entry {
3936
3937 /* Base hash table entry structure. */
3938 struct bfd_hash_entry root;
3939
3940 enum ppc_stub_type stub_type;
3941
3942 /* Group information. */
3943 struct map_stub *group;
3944
3945 /* Offset within stub_sec of the beginning of this stub. */
3946 bfd_vma stub_offset;
3947
3948 /* Given the symbol's value and its section we can determine its final
3949 value when building the stubs (so the stub knows where to jump. */
3950 bfd_vma target_value;
3951 asection *target_section;
3952
3953 /* The symbol table entry, if any, that this was derived from. */
3954 struct ppc_link_hash_entry *h;
3955 struct plt_entry *plt_ent;
3956
3957 /* Symbol st_other. */
3958 unsigned char other;
3959 };
3960
3961 struct ppc_branch_hash_entry {
3962
3963 /* Base hash table entry structure. */
3964 struct bfd_hash_entry root;
3965
3966 /* Offset within branch lookup table. */
3967 unsigned int offset;
3968
3969 /* Generation marker. */
3970 unsigned int iter;
3971 };
3972
3973 /* Used to track dynamic relocations for local symbols. */
3974 struct ppc_dyn_relocs
3975 {
3976 struct ppc_dyn_relocs *next;
3977
3978 /* The input section of the reloc. */
3979 asection *sec;
3980
3981 /* Total number of relocs copied for the input section. */
3982 unsigned int count : 31;
3983
3984 /* Whether this entry is for STT_GNU_IFUNC symbols. */
3985 unsigned int ifunc : 1;
3986 };
3987
3988 struct ppc_link_hash_entry
3989 {
3990 struct elf_link_hash_entry elf;
3991
3992 union {
3993 /* A pointer to the most recently used stub hash entry against this
3994 symbol. */
3995 struct ppc_stub_hash_entry *stub_cache;
3996
3997 /* A pointer to the next symbol starting with a '.' */
3998 struct ppc_link_hash_entry *next_dot_sym;
3999 } u;
4000
4001 /* Track dynamic relocs copied for this symbol. */
4002 struct elf_dyn_relocs *dyn_relocs;
4003
4004 /* Link between function code and descriptor symbols. */
4005 struct ppc_link_hash_entry *oh;
4006
4007 /* Flag function code and descriptor symbols. */
4008 unsigned int is_func:1;
4009 unsigned int is_func_descriptor:1;
4010 unsigned int fake:1;
4011
4012 /* Whether global opd/toc sym has been adjusted or not.
4013 After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
4014 should be set for all globals defined in any opd/toc section. */
4015 unsigned int adjust_done:1;
4016
4017 /* Set if this is an out-of-line register save/restore function,
4018 with non-standard calling convention. */
4019 unsigned int save_res:1;
4020
4021 /* Set if a duplicate symbol with non-zero localentry is detected,
4022 even when the duplicate symbol does not provide a definition. */
4023 unsigned int non_zero_localentry:1;
4024
4025 /* Contexts in which symbol is used in the GOT (or TOC).
4026 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
4027 corresponding relocs are encountered during check_relocs.
4028 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
4029 indicate the corresponding GOT entry type is not needed.
4030 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
4031 a TPREL one. We use a separate flag rather than setting TPREL
4032 just for convenience in distinguishing the two cases. */
4033 #define TLS_GD 1 /* GD reloc. */
4034 #define TLS_LD 2 /* LD reloc. */
4035 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
4036 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
4037 #define TLS_TLS 16 /* Any TLS reloc. */
4038 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
4039 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
4040 #define PLT_IFUNC 128 /* STT_GNU_IFUNC. */
4041 unsigned char tls_mask;
4042 };
4043
4044 /* ppc64 ELF linker hash table. */
4045
4046 struct ppc_link_hash_table
4047 {
4048 struct elf_link_hash_table elf;
4049
4050 /* The stub hash table. */
4051 struct bfd_hash_table stub_hash_table;
4052
4053 /* Another hash table for plt_branch stubs. */
4054 struct bfd_hash_table branch_hash_table;
4055
4056 /* Hash table for function prologue tocsave. */
4057 htab_t tocsave_htab;
4058
4059 /* Various options and other info passed from the linker. */
4060 struct ppc64_elf_params *params;
4061
4062 /* The size of sec_info below. */
4063 unsigned int sec_info_arr_size;
4064
4065 /* Per-section array of extra section info. Done this way rather
4066 than as part of ppc64_elf_section_data so we have the info for
4067 non-ppc64 sections. */
4068 struct
4069 {
4070 /* Along with elf_gp, specifies the TOC pointer used by this section. */
4071 bfd_vma toc_off;
4072
4073 union
4074 {
4075 /* The section group that this section belongs to. */
4076 struct map_stub *group;
4077 /* A temp section list pointer. */
4078 asection *list;
4079 } u;
4080 } *sec_info;
4081
4082 /* Linked list of groups. */
4083 struct map_stub *group;
4084
4085 /* Temp used when calculating TOC pointers. */
4086 bfd_vma toc_curr;
4087 bfd *toc_bfd;
4088 asection *toc_first_sec;
4089
4090 /* Used when adding symbols. */
4091 struct ppc_link_hash_entry *dot_syms;
4092
4093 /* Shortcuts to get to dynamic linker sections. */
4094 asection *glink;
4095 asection *sfpr;
4096 asection *brlt;
4097 asection *relbrlt;
4098 asection *glink_eh_frame;
4099
4100 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
4101 struct ppc_link_hash_entry *tls_get_addr;
4102 struct ppc_link_hash_entry *tls_get_addr_fd;
4103
4104 /* The size of reliplt used by got entry relocs. */
4105 bfd_size_type got_reli_size;
4106
4107 /* Statistics. */
4108 unsigned long stub_count[ppc_stub_global_entry];
4109
4110 /* Number of stubs against global syms. */
4111 unsigned long stub_globals;
4112
4113 /* Set if we're linking code with function descriptors. */
4114 unsigned int opd_abi:1;
4115
4116 /* Support for multiple toc sections. */
4117 unsigned int do_multi_toc:1;
4118 unsigned int multi_toc_needed:1;
4119 unsigned int second_toc_pass:1;
4120 unsigned int do_toc_opt:1;
4121
4122 /* Set if tls optimization is enabled. */
4123 unsigned int do_tls_opt:1;
4124
4125 /* Set on error. */
4126 unsigned int stub_error:1;
4127
4128 /* Whether func_desc_adjust needs to be run over symbols. */
4129 unsigned int need_func_desc_adj:1;
4130
4131 /* Whether there exist local gnu indirect function resolvers,
4132 referenced by dynamic relocations. */
4133 unsigned int local_ifunc_resolver:1;
4134 unsigned int maybe_local_ifunc_resolver:1;
4135
4136 /* Whether plt calls for ELFv2 localentry:0 funcs have been optimized. */
4137 unsigned int has_plt_localentry0:1;
4138
4139 /* Incremented every time we size stubs. */
4140 unsigned int stub_iteration;
4141
4142 /* Small local sym cache. */
4143 struct sym_cache sym_cache;
4144 };
4145
4146 /* Rename some of the generic section flags to better document how they
4147 are used here. */
4148
4149 /* Nonzero if this section has TLS related relocations. */
4150 #define has_tls_reloc sec_flg0
4151
4152 /* Nonzero if this section has a call to __tls_get_addr. */
4153 #define has_tls_get_addr_call sec_flg1
4154
4155 /* Nonzero if this section has any toc or got relocs. */
4156 #define has_toc_reloc sec_flg2
4157
4158 /* Nonzero if this section has a call to another section that uses
4159 the toc or got. */
4160 #define makes_toc_func_call sec_flg3
4161
4162 /* Recursion protection when determining above flag. */
4163 #define call_check_in_progress sec_flg4
4164 #define call_check_done sec_flg5
4165
4166 /* Get the ppc64 ELF linker hash table from a link_info structure. */
4167
4168 #define ppc_hash_table(p) \
4169 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
4170 == PPC64_ELF_DATA ? ((struct ppc_link_hash_table *) ((p)->hash)) : NULL)
4171
4172 #define ppc_stub_hash_lookup(table, string, create, copy) \
4173 ((struct ppc_stub_hash_entry *) \
4174 bfd_hash_lookup ((table), (string), (create), (copy)))
4175
4176 #define ppc_branch_hash_lookup(table, string, create, copy) \
4177 ((struct ppc_branch_hash_entry *) \
4178 bfd_hash_lookup ((table), (string), (create), (copy)))
4179
4180 /* Create an entry in the stub hash table. */
4181
4182 static struct bfd_hash_entry *
4183 stub_hash_newfunc (struct bfd_hash_entry *entry,
4184 struct bfd_hash_table *table,
4185 const char *string)
4186 {
4187 /* Allocate the structure if it has not already been allocated by a
4188 subclass. */
4189 if (entry == NULL)
4190 {
4191 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
4192 if (entry == NULL)
4193 return entry;
4194 }
4195
4196 /* Call the allocation method of the superclass. */
4197 entry = bfd_hash_newfunc (entry, table, string);
4198 if (entry != NULL)
4199 {
4200 struct ppc_stub_hash_entry *eh;
4201
4202 /* Initialize the local fields. */
4203 eh = (struct ppc_stub_hash_entry *) entry;
4204 eh->stub_type = ppc_stub_none;
4205 eh->group = NULL;
4206 eh->stub_offset = 0;
4207 eh->target_value = 0;
4208 eh->target_section = NULL;
4209 eh->h = NULL;
4210 eh->plt_ent = NULL;
4211 eh->other = 0;
4212 }
4213
4214 return entry;
4215 }
4216
4217 /* Create an entry in the branch hash table. */
4218
4219 static struct bfd_hash_entry *
4220 branch_hash_newfunc (struct bfd_hash_entry *entry,
4221 struct bfd_hash_table *table,
4222 const char *string)
4223 {
4224 /* Allocate the structure if it has not already been allocated by a
4225 subclass. */
4226 if (entry == NULL)
4227 {
4228 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
4229 if (entry == NULL)
4230 return entry;
4231 }
4232
4233 /* Call the allocation method of the superclass. */
4234 entry = bfd_hash_newfunc (entry, table, string);
4235 if (entry != NULL)
4236 {
4237 struct ppc_branch_hash_entry *eh;
4238
4239 /* Initialize the local fields. */
4240 eh = (struct ppc_branch_hash_entry *) entry;
4241 eh->offset = 0;
4242 eh->iter = 0;
4243 }
4244
4245 return entry;
4246 }
4247
4248 /* Create an entry in a ppc64 ELF linker hash table. */
4249
4250 static struct bfd_hash_entry *
4251 link_hash_newfunc (struct bfd_hash_entry *entry,
4252 struct bfd_hash_table *table,
4253 const char *string)
4254 {
4255 /* Allocate the structure if it has not already been allocated by a
4256 subclass. */
4257 if (entry == NULL)
4258 {
4259 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
4260 if (entry == NULL)
4261 return entry;
4262 }
4263
4264 /* Call the allocation method of the superclass. */
4265 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
4266 if (entry != NULL)
4267 {
4268 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
4269
4270 memset (&eh->u.stub_cache, 0,
4271 (sizeof (struct ppc_link_hash_entry)
4272 - offsetof (struct ppc_link_hash_entry, u.stub_cache)));
4273
4274 /* When making function calls, old ABI code references function entry
4275 points (dot symbols), while new ABI code references the function
4276 descriptor symbol. We need to make any combination of reference and
4277 definition work together, without breaking archive linking.
4278
4279 For a defined function "foo" and an undefined call to "bar":
4280 An old object defines "foo" and ".foo", references ".bar" (possibly
4281 "bar" too).
4282 A new object defines "foo" and references "bar".
4283
4284 A new object thus has no problem with its undefined symbols being
4285 satisfied by definitions in an old object. On the other hand, the
4286 old object won't have ".bar" satisfied by a new object.
4287
4288 Keep a list of newly added dot-symbols. */
4289
4290 if (string[0] == '.')
4291 {
4292 struct ppc_link_hash_table *htab;
4293
4294 htab = (struct ppc_link_hash_table *) table;
4295 eh->u.next_dot_sym = htab->dot_syms;
4296 htab->dot_syms = eh;
4297 }
4298 }
4299
4300 return entry;
4301 }
4302
4303 struct tocsave_entry {
4304 asection *sec;
4305 bfd_vma offset;
4306 };
4307
4308 static hashval_t
4309 tocsave_htab_hash (const void *p)
4310 {
4311 const struct tocsave_entry *e = (const struct tocsave_entry *) p;
4312 return ((bfd_vma) (intptr_t) e->sec ^ e->offset) >> 3;
4313 }
4314
4315 static int
4316 tocsave_htab_eq (const void *p1, const void *p2)
4317 {
4318 const struct tocsave_entry *e1 = (const struct tocsave_entry *) p1;
4319 const struct tocsave_entry *e2 = (const struct tocsave_entry *) p2;
4320 return e1->sec == e2->sec && e1->offset == e2->offset;
4321 }
4322
4323 /* Destroy a ppc64 ELF linker hash table. */
4324
4325 static void
4326 ppc64_elf_link_hash_table_free (bfd *obfd)
4327 {
4328 struct ppc_link_hash_table *htab;
4329
4330 htab = (struct ppc_link_hash_table *) obfd->link.hash;
4331 if (htab->tocsave_htab)
4332 htab_delete (htab->tocsave_htab);
4333 bfd_hash_table_free (&htab->branch_hash_table);
4334 bfd_hash_table_free (&htab->stub_hash_table);
4335 _bfd_elf_link_hash_table_free (obfd);
4336 }
4337
4338 /* Create a ppc64 ELF linker hash table. */
4339
4340 static struct bfd_link_hash_table *
4341 ppc64_elf_link_hash_table_create (bfd *abfd)
4342 {
4343 struct ppc_link_hash_table *htab;
4344 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
4345
4346 htab = bfd_zmalloc (amt);
4347 if (htab == NULL)
4348 return NULL;
4349
4350 if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc,
4351 sizeof (struct ppc_link_hash_entry),
4352 PPC64_ELF_DATA))
4353 {
4354 free (htab);
4355 return NULL;
4356 }
4357
4358 /* Init the stub hash table too. */
4359 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc,
4360 sizeof (struct ppc_stub_hash_entry)))
4361 {
4362 _bfd_elf_link_hash_table_free (abfd);
4363 return NULL;
4364 }
4365
4366 /* And the branch hash table. */
4367 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc,
4368 sizeof (struct ppc_branch_hash_entry)))
4369 {
4370 bfd_hash_table_free (&htab->stub_hash_table);
4371 _bfd_elf_link_hash_table_free (abfd);
4372 return NULL;
4373 }
4374
4375 htab->tocsave_htab = htab_try_create (1024,
4376 tocsave_htab_hash,
4377 tocsave_htab_eq,
4378 NULL);
4379 if (htab->tocsave_htab == NULL)
4380 {
4381 ppc64_elf_link_hash_table_free (abfd);
4382 return NULL;
4383 }
4384 htab->elf.root.hash_table_free = ppc64_elf_link_hash_table_free;
4385
4386 /* Initializing two fields of the union is just cosmetic. We really
4387 only care about glist, but when compiled on a 32-bit host the
4388 bfd_vma fields are larger. Setting the bfd_vma to zero makes
4389 debugger inspection of these fields look nicer. */
4390 htab->elf.init_got_refcount.refcount = 0;
4391 htab->elf.init_got_refcount.glist = NULL;
4392 htab->elf.init_plt_refcount.refcount = 0;
4393 htab->elf.init_plt_refcount.glist = NULL;
4394 htab->elf.init_got_offset.offset = 0;
4395 htab->elf.init_got_offset.glist = NULL;
4396 htab->elf.init_plt_offset.offset = 0;
4397 htab->elf.init_plt_offset.glist = NULL;
4398
4399 return &htab->elf.root;
4400 }
4401
4402 /* Create sections for linker generated code. */
4403
4404 static bfd_boolean
4405 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
4406 {
4407 struct ppc_link_hash_table *htab;
4408 flagword flags;
4409
4410 htab = ppc_hash_table (info);
4411
4412 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
4413 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4414 if (htab->params->save_restore_funcs)
4415 {
4416 /* Create .sfpr for code to save and restore fp regs. */
4417 htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr",
4418 flags);
4419 if (htab->sfpr == NULL
4420 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
4421 return FALSE;
4422 }
4423
4424 if (bfd_link_relocatable (info))
4425 return TRUE;
4426
4427 /* Create .glink for lazy dynamic linking support. */
4428 htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink",
4429 flags);
4430 if (htab->glink == NULL
4431 || ! bfd_set_section_alignment (dynobj, htab->glink, 3))
4432 return FALSE;
4433
4434 if (!info->no_ld_generated_unwind_info)
4435 {
4436 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
4437 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4438 htab->glink_eh_frame = bfd_make_section_anyway_with_flags (dynobj,
4439 ".eh_frame",
4440 flags);
4441 if (htab->glink_eh_frame == NULL
4442 || !bfd_set_section_alignment (dynobj, htab->glink_eh_frame, 2))
4443 return FALSE;
4444 }
4445
4446 flags = SEC_ALLOC | SEC_LINKER_CREATED;
4447 htab->elf.iplt = bfd_make_section_anyway_with_flags (dynobj, ".iplt", flags);
4448 if (htab->elf.iplt == NULL
4449 || ! bfd_set_section_alignment (dynobj, htab->elf.iplt, 3))
4450 return FALSE;
4451
4452 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4453 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4454 htab->elf.irelplt
4455 = bfd_make_section_anyway_with_flags (dynobj, ".rela.iplt", flags);
4456 if (htab->elf.irelplt == NULL
4457 || ! bfd_set_section_alignment (dynobj, htab->elf.irelplt, 3))
4458 return FALSE;
4459
4460 /* Create branch lookup table for plt_branch stubs. */
4461 flags = (SEC_ALLOC | SEC_LOAD
4462 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4463 htab->brlt = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt",
4464 flags);
4465 if (htab->brlt == NULL
4466 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
4467 return FALSE;
4468
4469 if (!bfd_link_pic (info))
4470 return TRUE;
4471
4472 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4473 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4474 htab->relbrlt = bfd_make_section_anyway_with_flags (dynobj,
4475 ".rela.branch_lt",
4476 flags);
4477 if (htab->relbrlt == NULL
4478 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
4479 return FALSE;
4480
4481 return TRUE;
4482 }
4483
4484 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
4485
4486 bfd_boolean
4487 ppc64_elf_init_stub_bfd (struct bfd_link_info *info,
4488 struct ppc64_elf_params *params)
4489 {
4490 struct ppc_link_hash_table *htab;
4491
4492 elf_elfheader (params->stub_bfd)->e_ident[EI_CLASS] = ELFCLASS64;
4493
4494 /* Always hook our dynamic sections into the first bfd, which is the
4495 linker created stub bfd. This ensures that the GOT header is at
4496 the start of the output TOC section. */
4497 htab = ppc_hash_table (info);
4498 htab->elf.dynobj = params->stub_bfd;
4499 htab->params = params;
4500
4501 return create_linkage_sections (htab->elf.dynobj, info);
4502 }
4503
4504 /* Build a name for an entry in the stub hash table. */
4505
4506 static char *
4507 ppc_stub_name (const asection *input_section,
4508 const asection *sym_sec,
4509 const struct ppc_link_hash_entry *h,
4510 const Elf_Internal_Rela *rel)
4511 {
4512 char *stub_name;
4513 ssize_t len;
4514
4515 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
4516 offsets from a sym as a branch target? In fact, we could
4517 probably assume the addend is always zero. */
4518 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
4519
4520 if (h)
4521 {
4522 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
4523 stub_name = bfd_malloc (len);
4524 if (stub_name == NULL)
4525 return stub_name;
4526
4527 len = sprintf (stub_name, "%08x.%s+%x",
4528 input_section->id & 0xffffffff,
4529 h->elf.root.root.string,
4530 (int) rel->r_addend & 0xffffffff);
4531 }
4532 else
4533 {
4534 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
4535 stub_name = bfd_malloc (len);
4536 if (stub_name == NULL)
4537 return stub_name;
4538
4539 len = sprintf (stub_name, "%08x.%x:%x+%x",
4540 input_section->id & 0xffffffff,
4541 sym_sec->id & 0xffffffff,
4542 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
4543 (int) rel->r_addend & 0xffffffff);
4544 }
4545 if (len > 2 && stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
4546 stub_name[len - 2] = 0;
4547 return stub_name;
4548 }
4549
4550 /* Look up an entry in the stub hash. Stub entries are cached because
4551 creating the stub name takes a bit of time. */
4552
4553 static struct ppc_stub_hash_entry *
4554 ppc_get_stub_entry (const asection *input_section,
4555 const asection *sym_sec,
4556 struct ppc_link_hash_entry *h,
4557 const Elf_Internal_Rela *rel,
4558 struct ppc_link_hash_table *htab)
4559 {
4560 struct ppc_stub_hash_entry *stub_entry;
4561 struct map_stub *group;
4562
4563 /* If this input section is part of a group of sections sharing one
4564 stub section, then use the id of the first section in the group.
4565 Stub names need to include a section id, as there may well be
4566 more than one stub used to reach say, printf, and we need to
4567 distinguish between them. */
4568 group = htab->sec_info[input_section->id].u.group;
4569 if (group == NULL)
4570 return NULL;
4571
4572 if (h != NULL && h->u.stub_cache != NULL
4573 && h->u.stub_cache->h == h
4574 && h->u.stub_cache->group == group)
4575 {
4576 stub_entry = h->u.stub_cache;
4577 }
4578 else
4579 {
4580 char *stub_name;
4581
4582 stub_name = ppc_stub_name (group->link_sec, sym_sec, h, rel);
4583 if (stub_name == NULL)
4584 return NULL;
4585
4586 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
4587 stub_name, FALSE, FALSE);
4588 if (h != NULL)
4589 h->u.stub_cache = stub_entry;
4590
4591 free (stub_name);
4592 }
4593
4594 return stub_entry;
4595 }
4596
4597 /* Add a new stub entry to the stub hash. Not all fields of the new
4598 stub entry are initialised. */
4599
4600 static struct ppc_stub_hash_entry *
4601 ppc_add_stub (const char *stub_name,
4602 asection *section,
4603 struct bfd_link_info *info)
4604 {
4605 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4606 struct map_stub *group;
4607 asection *link_sec;
4608 asection *stub_sec;
4609 struct ppc_stub_hash_entry *stub_entry;
4610
4611 group = htab->sec_info[section->id].u.group;
4612 link_sec = group->link_sec;
4613 stub_sec = group->stub_sec;
4614 if (stub_sec == NULL)
4615 {
4616 size_t namelen;
4617 bfd_size_type len;
4618 char *s_name;
4619
4620 namelen = strlen (link_sec->name);
4621 len = namelen + sizeof (STUB_SUFFIX);
4622 s_name = bfd_alloc (htab->params->stub_bfd, len);
4623 if (s_name == NULL)
4624 return NULL;
4625
4626 memcpy (s_name, link_sec->name, namelen);
4627 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
4628 stub_sec = (*htab->params->add_stub_section) (s_name, link_sec);
4629 if (stub_sec == NULL)
4630 return NULL;
4631 group->stub_sec = stub_sec;
4632 }
4633
4634 /* Enter this entry into the linker stub hash table. */
4635 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
4636 TRUE, FALSE);
4637 if (stub_entry == NULL)
4638 {
4639 /* xgettext:c-format */
4640 info->callbacks->einfo (_("%P: %B: cannot create stub entry %s\n"),
4641 section->owner, stub_name);
4642 return NULL;
4643 }
4644
4645 stub_entry->group = group;
4646 stub_entry->stub_offset = 0;
4647 return stub_entry;
4648 }
4649
4650 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
4651 not already done. */
4652
4653 static bfd_boolean
4654 create_got_section (bfd *abfd, struct bfd_link_info *info)
4655 {
4656 asection *got, *relgot;
4657 flagword flags;
4658 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4659
4660 if (!is_ppc64_elf (abfd))
4661 return FALSE;
4662 if (htab == NULL)
4663 return FALSE;
4664
4665 if (!htab->elf.sgot
4666 && !_bfd_elf_create_got_section (htab->elf.dynobj, info))
4667 return FALSE;
4668
4669 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
4670 | SEC_LINKER_CREATED);
4671
4672 got = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
4673 if (!got
4674 || !bfd_set_section_alignment (abfd, got, 3))
4675 return FALSE;
4676
4677 relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got",
4678 flags | SEC_READONLY);
4679 if (!relgot
4680 || ! bfd_set_section_alignment (abfd, relgot, 3))
4681 return FALSE;
4682
4683 ppc64_elf_tdata (abfd)->got = got;
4684 ppc64_elf_tdata (abfd)->relgot = relgot;
4685 return TRUE;
4686 }
4687
4688 /* Follow indirect and warning symbol links. */
4689
4690 static inline struct bfd_link_hash_entry *
4691 follow_link (struct bfd_link_hash_entry *h)
4692 {
4693 while (h->type == bfd_link_hash_indirect
4694 || h->type == bfd_link_hash_warning)
4695 h = h->u.i.link;
4696 return h;
4697 }
4698
4699 static inline struct elf_link_hash_entry *
4700 elf_follow_link (struct elf_link_hash_entry *h)
4701 {
4702 return (struct elf_link_hash_entry *) follow_link (&h->root);
4703 }
4704
4705 static inline struct ppc_link_hash_entry *
4706 ppc_follow_link (struct ppc_link_hash_entry *h)
4707 {
4708 return (struct ppc_link_hash_entry *) follow_link (&h->elf.root);
4709 }
4710
4711 /* Merge PLT info on FROM with that on TO. */
4712
4713 static void
4714 move_plt_plist (struct ppc_link_hash_entry *from,
4715 struct ppc_link_hash_entry *to)
4716 {
4717 if (from->elf.plt.plist != NULL)
4718 {
4719 if (to->elf.plt.plist != NULL)
4720 {
4721 struct plt_entry **entp;
4722 struct plt_entry *ent;
4723
4724 for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; )
4725 {
4726 struct plt_entry *dent;
4727
4728 for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next)
4729 if (dent->addend == ent->addend)
4730 {
4731 dent->plt.refcount += ent->plt.refcount;
4732 *entp = ent->next;
4733 break;
4734 }
4735 if (dent == NULL)
4736 entp = &ent->next;
4737 }
4738 *entp = to->elf.plt.plist;
4739 }
4740
4741 to->elf.plt.plist = from->elf.plt.plist;
4742 from->elf.plt.plist = NULL;
4743 }
4744 }
4745
4746 /* Copy the extra info we tack onto an elf_link_hash_entry. */
4747
4748 static void
4749 ppc64_elf_copy_indirect_symbol (struct bfd_link_info *info,
4750 struct elf_link_hash_entry *dir,
4751 struct elf_link_hash_entry *ind)
4752 {
4753 struct ppc_link_hash_entry *edir, *eind;
4754
4755 edir = (struct ppc_link_hash_entry *) dir;
4756 eind = (struct ppc_link_hash_entry *) ind;
4757
4758 edir->is_func |= eind->is_func;
4759 edir->is_func_descriptor |= eind->is_func_descriptor;
4760 edir->tls_mask |= eind->tls_mask;
4761 if (eind->oh != NULL)
4762 edir->oh = ppc_follow_link (eind->oh);
4763
4764 if (edir->elf.versioned != versioned_hidden)
4765 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
4766 edir->elf.ref_regular |= eind->elf.ref_regular;
4767 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
4768 edir->elf.non_got_ref |= eind->elf.non_got_ref;
4769 edir->elf.needs_plt |= eind->elf.needs_plt;
4770 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed;
4771
4772 /* If we were called to copy over info for a weak sym, don't copy
4773 dyn_relocs, plt/got info, or dynindx. We used to copy dyn_relocs
4774 in order to simplify readonly_dynrelocs and save a field in the
4775 symbol hash entry, but that means dyn_relocs can't be used in any
4776 tests about a specific symbol, or affect other symbol flags which
4777 are then tested. */
4778 if (eind->elf.root.type != bfd_link_hash_indirect)
4779 return;
4780
4781 /* Copy over any dynamic relocs we may have on the indirect sym. */
4782 if (eind->dyn_relocs != NULL)
4783 {
4784 if (edir->dyn_relocs != NULL)
4785 {
4786 struct elf_dyn_relocs **pp;
4787 struct elf_dyn_relocs *p;
4788
4789 /* Add reloc counts against the indirect sym to the direct sym
4790 list. Merge any entries against the same section. */
4791 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
4792 {
4793 struct elf_dyn_relocs *q;
4794
4795 for (q = edir->dyn_relocs; q != NULL; q = q->next)
4796 if (q->sec == p->sec)
4797 {
4798 q->pc_count += p->pc_count;
4799 q->count += p->count;
4800 *pp = p->next;
4801 break;
4802 }
4803 if (q == NULL)
4804 pp = &p->next;
4805 }
4806 *pp = edir->dyn_relocs;
4807 }
4808
4809 edir->dyn_relocs = eind->dyn_relocs;
4810 eind->dyn_relocs = NULL;
4811 }
4812
4813 /* Copy over got entries that we may have already seen to the
4814 symbol which just became indirect. */
4815 if (eind->elf.got.glist != NULL)
4816 {
4817 if (edir->elf.got.glist != NULL)
4818 {
4819 struct got_entry **entp;
4820 struct got_entry *ent;
4821
4822 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
4823 {
4824 struct got_entry *dent;
4825
4826 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
4827 if (dent->addend == ent->addend
4828 && dent->owner == ent->owner
4829 && dent->tls_type == ent->tls_type)
4830 {
4831 dent->got.refcount += ent->got.refcount;
4832 *entp = ent->next;
4833 break;
4834 }
4835 if (dent == NULL)
4836 entp = &ent->next;
4837 }
4838 *entp = edir->elf.got.glist;
4839 }
4840
4841 edir->elf.got.glist = eind->elf.got.glist;
4842 eind->elf.got.glist = NULL;
4843 }
4844
4845 /* And plt entries. */
4846 move_plt_plist (eind, edir);
4847
4848 if (eind->elf.dynindx != -1)
4849 {
4850 if (edir->elf.dynindx != -1)
4851 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4852 edir->elf.dynstr_index);
4853 edir->elf.dynindx = eind->elf.dynindx;
4854 edir->elf.dynstr_index = eind->elf.dynstr_index;
4855 eind->elf.dynindx = -1;
4856 eind->elf.dynstr_index = 0;
4857 }
4858 }
4859
4860 /* Find the function descriptor hash entry from the given function code
4861 hash entry FH. Link the entries via their OH fields. */
4862
4863 static struct ppc_link_hash_entry *
4864 lookup_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
4865 {
4866 struct ppc_link_hash_entry *fdh = fh->oh;
4867
4868 if (fdh == NULL)
4869 {
4870 const char *fd_name = fh->elf.root.root.string + 1;
4871
4872 fdh = (struct ppc_link_hash_entry *)
4873 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
4874 if (fdh == NULL)
4875 return fdh;
4876
4877 fdh->is_func_descriptor = 1;
4878 fdh->oh = fh;
4879 fh->is_func = 1;
4880 fh->oh = fdh;
4881 }
4882
4883 fdh = ppc_follow_link (fdh);
4884 fdh->is_func_descriptor = 1;
4885 fdh->oh = fh;
4886 return fdh;
4887 }
4888
4889 /* Make a fake function descriptor sym for the undefined code sym FH. */
4890
4891 static struct ppc_link_hash_entry *
4892 make_fdh (struct bfd_link_info *info,
4893 struct ppc_link_hash_entry *fh)
4894 {
4895 bfd *abfd = fh->elf.root.u.undef.abfd;
4896 struct bfd_link_hash_entry *bh = NULL;
4897 struct ppc_link_hash_entry *fdh;
4898 flagword flags = (fh->elf.root.type == bfd_link_hash_undefweak
4899 ? BSF_WEAK
4900 : BSF_GLOBAL);
4901
4902 if (!_bfd_generic_link_add_one_symbol (info, abfd,
4903 fh->elf.root.root.string + 1,
4904 flags, bfd_und_section_ptr, 0,
4905 NULL, FALSE, FALSE, &bh))
4906 return NULL;
4907
4908 fdh = (struct ppc_link_hash_entry *) bh;
4909 fdh->elf.non_elf = 0;
4910 fdh->fake = 1;
4911 fdh->is_func_descriptor = 1;
4912 fdh->oh = fh;
4913 fh->is_func = 1;
4914 fh->oh = fdh;
4915 return fdh;
4916 }
4917
4918 /* Fix function descriptor symbols defined in .opd sections to be
4919 function type. */
4920
4921 static bfd_boolean
4922 ppc64_elf_add_symbol_hook (bfd *ibfd,
4923 struct bfd_link_info *info,
4924 Elf_Internal_Sym *isym,
4925 const char **name,
4926 flagword *flags ATTRIBUTE_UNUSED,
4927 asection **sec,
4928 bfd_vma *value)
4929 {
4930 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC
4931 && (ibfd->flags & DYNAMIC) == 0
4932 && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour)
4933 elf_tdata (info->output_bfd)->has_gnu_symbols |= elf_gnu_symbol_ifunc;
4934
4935 if (*sec != NULL
4936 && strcmp ((*sec)->name, ".opd") == 0)
4937 {
4938 asection *code_sec;
4939
4940 if (!(ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC
4941 || ELF_ST_TYPE (isym->st_info) == STT_FUNC))
4942 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
4943
4944 /* If the symbol is a function defined in .opd, and the function
4945 code is in a discarded group, let it appear to be undefined. */
4946 if (!bfd_link_relocatable (info)
4947 && (*sec)->reloc_count != 0
4948 && opd_entry_value (*sec, *value, &code_sec, NULL,
4949 FALSE) != (bfd_vma) -1
4950 && discarded_section (code_sec))
4951 {
4952 *sec = bfd_und_section_ptr;
4953 isym->st_shndx = SHN_UNDEF;
4954 }
4955 }
4956 else if (*sec != NULL
4957 && strcmp ((*sec)->name, ".toc") == 0
4958 && ELF_ST_TYPE (isym->st_info) == STT_OBJECT)
4959 {
4960 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4961 if (htab != NULL)
4962 htab->params->object_in_toc = 1;
4963 }
4964
4965 if ((STO_PPC64_LOCAL_MASK & isym->st_other) != 0)
4966 {
4967 if (abiversion (ibfd) == 0)
4968 set_abiversion (ibfd, 2);
4969 else if (abiversion (ibfd) == 1)
4970 {
4971 info->callbacks->einfo (_("%P: symbol '%s' has invalid st_other"
4972 " for ABI version 1\n"), name);
4973 bfd_set_error (bfd_error_bad_value);
4974 return FALSE;
4975 }
4976 }
4977
4978 return TRUE;
4979 }
4980
4981 /* Merge non-visibility st_other attributes: local entry point. */
4982
4983 static void
4984 ppc64_elf_merge_symbol_attribute (struct elf_link_hash_entry *h,
4985 const Elf_Internal_Sym *isym,
4986 bfd_boolean definition,
4987 bfd_boolean dynamic)
4988 {
4989 if (definition && (!dynamic || !h->def_regular))
4990 h->other = ((isym->st_other & ~ELF_ST_VISIBILITY (-1))
4991 | ELF_ST_VISIBILITY (h->other));
4992 }
4993
4994 /* Hook called on merging a symbol. We use this to clear "fake" since
4995 we now have a real symbol. */
4996
4997 static bfd_boolean
4998 ppc64_elf_merge_symbol (struct elf_link_hash_entry *h,
4999 const Elf_Internal_Sym *isym,
5000 asection **psec ATTRIBUTE_UNUSED,
5001 bfd_boolean newdef ATTRIBUTE_UNUSED,
5002 bfd_boolean olddef ATTRIBUTE_UNUSED,
5003 bfd *oldbfd ATTRIBUTE_UNUSED,
5004 const asection *oldsec ATTRIBUTE_UNUSED)
5005 {
5006 ((struct ppc_link_hash_entry *) h)->fake = 0;
5007 if ((STO_PPC64_LOCAL_MASK & isym->st_other) != 0)
5008 ((struct ppc_link_hash_entry *) h)->non_zero_localentry = 1;
5009 return TRUE;
5010 }
5011
5012 /* This function makes an old ABI object reference to ".bar" cause the
5013 inclusion of a new ABI object archive that defines "bar".
5014 NAME is a symbol defined in an archive. Return a symbol in the hash
5015 table that might be satisfied by the archive symbols. */
5016
5017 static struct elf_link_hash_entry *
5018 ppc64_elf_archive_symbol_lookup (bfd *abfd,
5019 struct bfd_link_info *info,
5020 const char *name)
5021 {
5022 struct elf_link_hash_entry *h;
5023 char *dot_name;
5024 size_t len;
5025
5026 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
5027 if (h != NULL
5028 /* Don't return this sym if it is a fake function descriptor
5029 created by add_symbol_adjust. */
5030 && !((struct ppc_link_hash_entry *) h)->fake)
5031 return h;
5032
5033 if (name[0] == '.')
5034 return h;
5035
5036 len = strlen (name);
5037 dot_name = bfd_alloc (abfd, len + 2);
5038 if (dot_name == NULL)
5039 return (struct elf_link_hash_entry *) 0 - 1;
5040 dot_name[0] = '.';
5041 memcpy (dot_name + 1, name, len + 1);
5042 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
5043 bfd_release (abfd, dot_name);
5044 return h;
5045 }
5046
5047 /* This function satisfies all old ABI object references to ".bar" if a
5048 new ABI object defines "bar". Well, at least, undefined dot symbols
5049 are made weak. This stops later archive searches from including an
5050 object if we already have a function descriptor definition. It also
5051 prevents the linker complaining about undefined symbols.
5052 We also check and correct mismatched symbol visibility here. The
5053 most restrictive visibility of the function descriptor and the
5054 function entry symbol is used. */
5055
5056 static bfd_boolean
5057 add_symbol_adjust (struct ppc_link_hash_entry *eh, struct bfd_link_info *info)
5058 {
5059 struct ppc_link_hash_table *htab;
5060 struct ppc_link_hash_entry *fdh;
5061
5062 if (eh->elf.root.type == bfd_link_hash_warning)
5063 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
5064
5065 if (eh->elf.root.type == bfd_link_hash_indirect)
5066 return TRUE;
5067
5068 if (eh->elf.root.root.string[0] != '.')
5069 abort ();
5070
5071 htab = ppc_hash_table (info);
5072 if (htab == NULL)
5073 return FALSE;
5074
5075 fdh = lookup_fdh (eh, htab);
5076 if (fdh == NULL
5077 && !bfd_link_relocatable (info)
5078 && (eh->elf.root.type == bfd_link_hash_undefined
5079 || eh->elf.root.type == bfd_link_hash_undefweak)
5080 && eh->elf.ref_regular)
5081 {
5082 /* Make an undefined function descriptor sym, in order to
5083 pull in an --as-needed shared lib. Archives are handled
5084 elsewhere. */
5085 fdh = make_fdh (info, eh);
5086 if (fdh == NULL)
5087 return FALSE;
5088 }
5089
5090 if (fdh != NULL)
5091 {
5092 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
5093 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
5094
5095 /* Make both descriptor and entry symbol have the most
5096 constraining visibility of either symbol. */
5097 if (entry_vis < descr_vis)
5098 fdh->elf.other += entry_vis - descr_vis;
5099 else if (entry_vis > descr_vis)
5100 eh->elf.other += descr_vis - entry_vis;
5101
5102 /* Propagate reference flags from entry symbol to function
5103 descriptor symbol. */
5104 fdh->elf.root.non_ir_ref_regular |= eh->elf.root.non_ir_ref_regular;
5105 fdh->elf.root.non_ir_ref_dynamic |= eh->elf.root.non_ir_ref_dynamic;
5106 fdh->elf.ref_regular |= eh->elf.ref_regular;
5107 fdh->elf.ref_regular_nonweak |= eh->elf.ref_regular_nonweak;
5108
5109 if (!fdh->elf.forced_local
5110 && fdh->elf.dynindx == -1
5111 && fdh->elf.versioned != versioned_hidden
5112 && (bfd_link_dll (info)
5113 || fdh->elf.def_dynamic
5114 || fdh->elf.ref_dynamic)
5115 && (eh->elf.ref_regular
5116 || eh->elf.def_regular))
5117 {
5118 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
5119 return FALSE;
5120 }
5121 }
5122
5123 return TRUE;
5124 }
5125
5126 /* Set up opd section info and abiversion for IBFD, and process list
5127 of dot-symbols we made in link_hash_newfunc. */
5128
5129 static bfd_boolean
5130 ppc64_elf_before_check_relocs (bfd *ibfd, struct bfd_link_info *info)
5131 {
5132 struct ppc_link_hash_table *htab;
5133 struct ppc_link_hash_entry **p, *eh;
5134 asection *opd = bfd_get_section_by_name (ibfd, ".opd");
5135
5136 if (opd != NULL && opd->size != 0)
5137 {
5138 BFD_ASSERT (ppc64_elf_section_data (opd)->sec_type == sec_normal);
5139 ppc64_elf_section_data (opd)->sec_type = sec_opd;
5140
5141 if (abiversion (ibfd) == 0)
5142 set_abiversion (ibfd, 1);
5143 else if (abiversion (ibfd) >= 2)
5144 {
5145 /* xgettext:c-format */
5146 info->callbacks->einfo (_("%P: %B .opd not allowed in ABI"
5147 " version %d\n"),
5148 ibfd, abiversion (ibfd));
5149 bfd_set_error (bfd_error_bad_value);
5150 return FALSE;
5151 }
5152 }
5153
5154 if (is_ppc64_elf (info->output_bfd))
5155 {
5156 /* For input files without an explicit abiversion in e_flags
5157 we should have flagged any with symbol st_other bits set
5158 as ELFv1 and above flagged those with .opd as ELFv2.
5159 Set the output abiversion if not yet set, and for any input
5160 still ambiguous, take its abiversion from the output.
5161 Differences in ABI are reported later. */
5162 if (abiversion (info->output_bfd) == 0)
5163 set_abiversion (info->output_bfd, abiversion (ibfd));
5164 else if (abiversion (ibfd) == 0)
5165 set_abiversion (ibfd, abiversion (info->output_bfd));
5166 }
5167
5168 htab = ppc_hash_table (info);
5169 if (htab == NULL)
5170 return TRUE;
5171
5172 if (opd != NULL && opd->size != 0
5173 && (ibfd->flags & DYNAMIC) == 0
5174 && (opd->flags & SEC_RELOC) != 0
5175 && opd->reloc_count != 0
5176 && !bfd_is_abs_section (opd->output_section)
5177 && info->gc_sections)
5178 {
5179 /* Garbage collection needs some extra help with .opd sections.
5180 We don't want to necessarily keep everything referenced by
5181 relocs in .opd, as that would keep all functions. Instead,
5182 if we reference an .opd symbol (a function descriptor), we
5183 want to keep the function code symbol's section. This is
5184 easy for global symbols, but for local syms we need to keep
5185 information about the associated function section. */
5186 bfd_size_type amt;
5187 asection **opd_sym_map;
5188 Elf_Internal_Shdr *symtab_hdr;
5189 Elf_Internal_Rela *relocs, *rel_end, *rel;
5190
5191 amt = OPD_NDX (opd->size) * sizeof (*opd_sym_map);
5192 opd_sym_map = bfd_zalloc (ibfd, amt);
5193 if (opd_sym_map == NULL)
5194 return FALSE;
5195 ppc64_elf_section_data (opd)->u.opd.func_sec = opd_sym_map;
5196 relocs = _bfd_elf_link_read_relocs (ibfd, opd, NULL, NULL,
5197 info->keep_memory);
5198 if (relocs == NULL)
5199 return FALSE;
5200 symtab_hdr = &elf_symtab_hdr (ibfd);
5201 rel_end = relocs + opd->reloc_count - 1;
5202 for (rel = relocs; rel < rel_end; rel++)
5203 {
5204 enum elf_ppc64_reloc_type r_type = ELF64_R_TYPE (rel->r_info);
5205 unsigned long r_symndx = ELF64_R_SYM (rel->r_info);
5206
5207 if (r_type == R_PPC64_ADDR64
5208 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC
5209 && r_symndx < symtab_hdr->sh_info)
5210 {
5211 Elf_Internal_Sym *isym;
5212 asection *s;
5213
5214 isym = bfd_sym_from_r_symndx (&htab->sym_cache, ibfd, r_symndx);
5215 if (isym == NULL)
5216 {
5217 if (elf_section_data (opd)->relocs != relocs)
5218 free (relocs);
5219 return FALSE;
5220 }
5221
5222 s = bfd_section_from_elf_index (ibfd, isym->st_shndx);
5223 if (s != NULL && s != opd)
5224 opd_sym_map[OPD_NDX (rel->r_offset)] = s;
5225 }
5226 }
5227 if (elf_section_data (opd)->relocs != relocs)
5228 free (relocs);
5229 }
5230
5231 p = &htab->dot_syms;
5232 while ((eh = *p) != NULL)
5233 {
5234 *p = NULL;
5235 if (&eh->elf == htab->elf.hgot)
5236 ;
5237 else if (htab->elf.hgot == NULL
5238 && strcmp (eh->elf.root.root.string, ".TOC.") == 0)
5239 htab->elf.hgot = &eh->elf;
5240 else if (abiversion (ibfd) <= 1)
5241 {
5242 htab->need_func_desc_adj = 1;
5243 if (!add_symbol_adjust (eh, info))
5244 return FALSE;
5245 }
5246 p = &eh->u.next_dot_sym;
5247 }
5248 return TRUE;
5249 }
5250
5251 /* Undo hash table changes when an --as-needed input file is determined
5252 not to be needed. */
5253
5254 static bfd_boolean
5255 ppc64_elf_notice_as_needed (bfd *ibfd,
5256 struct bfd_link_info *info,
5257 enum notice_asneeded_action act)
5258 {
5259 if (act == notice_not_needed)
5260 {
5261 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5262
5263 if (htab == NULL)
5264 return FALSE;
5265
5266 htab->dot_syms = NULL;
5267 }
5268 return _bfd_elf_notice_as_needed (ibfd, info, act);
5269 }
5270
5271 /* If --just-symbols against a final linked binary, then assume we need
5272 toc adjusting stubs when calling functions defined there. */
5273
5274 static void
5275 ppc64_elf_link_just_syms (asection *sec, struct bfd_link_info *info)
5276 {
5277 if ((sec->flags & SEC_CODE) != 0
5278 && (sec->owner->flags & (EXEC_P | DYNAMIC)) != 0
5279 && is_ppc64_elf (sec->owner))
5280 {
5281 if (abiversion (sec->owner) >= 2
5282 || bfd_get_section_by_name (sec->owner, ".opd") != NULL)
5283 sec->has_toc_reloc = 1;
5284 }
5285 _bfd_elf_link_just_syms (sec, info);
5286 }
5287
5288 static struct plt_entry **
5289 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
5290 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
5291 {
5292 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
5293 struct plt_entry **local_plt;
5294 unsigned char *local_got_tls_masks;
5295
5296 if (local_got_ents == NULL)
5297 {
5298 bfd_size_type size = symtab_hdr->sh_info;
5299
5300 size *= (sizeof (*local_got_ents)
5301 + sizeof (*local_plt)
5302 + sizeof (*local_got_tls_masks));
5303 local_got_ents = bfd_zalloc (abfd, size);
5304 if (local_got_ents == NULL)
5305 return NULL;
5306 elf_local_got_ents (abfd) = local_got_ents;
5307 }
5308
5309 if ((tls_type & (PLT_IFUNC | TLS_EXPLICIT)) == 0)
5310 {
5311 struct got_entry *ent;
5312
5313 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
5314 if (ent->addend == r_addend
5315 && ent->owner == abfd
5316 && ent->tls_type == tls_type)
5317 break;
5318 if (ent == NULL)
5319 {
5320 bfd_size_type amt = sizeof (*ent);
5321 ent = bfd_alloc (abfd, amt);
5322 if (ent == NULL)
5323 return FALSE;
5324 ent->next = local_got_ents[r_symndx];
5325 ent->addend = r_addend;
5326 ent->owner = abfd;
5327 ent->tls_type = tls_type;
5328 ent->is_indirect = FALSE;
5329 ent->got.refcount = 0;
5330 local_got_ents[r_symndx] = ent;
5331 }
5332 ent->got.refcount += 1;
5333 }
5334
5335 local_plt = (struct plt_entry **) (local_got_ents + symtab_hdr->sh_info);
5336 local_got_tls_masks = (unsigned char *) (local_plt + symtab_hdr->sh_info);
5337 local_got_tls_masks[r_symndx] |= tls_type;
5338
5339 return local_plt + r_symndx;
5340 }
5341
5342 static bfd_boolean
5343 update_plt_info (bfd *abfd, struct plt_entry **plist, bfd_vma addend)
5344 {
5345 struct plt_entry *ent;
5346
5347 for (ent = *plist; ent != NULL; ent = ent->next)
5348 if (ent->addend == addend)
5349 break;
5350 if (ent == NULL)
5351 {
5352 bfd_size_type amt = sizeof (*ent);
5353 ent = bfd_alloc (abfd, amt);
5354 if (ent == NULL)
5355 return FALSE;
5356 ent->next = *plist;
5357 ent->addend = addend;
5358 ent->plt.refcount = 0;
5359 *plist = ent;
5360 }
5361 ent->plt.refcount += 1;
5362 return TRUE;
5363 }
5364
5365 static bfd_boolean
5366 is_branch_reloc (enum elf_ppc64_reloc_type r_type)
5367 {
5368 return (r_type == R_PPC64_REL24
5369 || r_type == R_PPC64_REL14
5370 || r_type == R_PPC64_REL14_BRTAKEN
5371 || r_type == R_PPC64_REL14_BRNTAKEN
5372 || r_type == R_PPC64_ADDR24
5373 || r_type == R_PPC64_ADDR14
5374 || r_type == R_PPC64_ADDR14_BRTAKEN
5375 || r_type == R_PPC64_ADDR14_BRNTAKEN);
5376 }
5377
5378 /* Look through the relocs for a section during the first phase, and
5379 calculate needed space in the global offset table, procedure
5380 linkage table, and dynamic reloc sections. */
5381
5382 static bfd_boolean
5383 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
5384 asection *sec, const Elf_Internal_Rela *relocs)
5385 {
5386 struct ppc_link_hash_table *htab;
5387 Elf_Internal_Shdr *symtab_hdr;
5388 struct elf_link_hash_entry **sym_hashes;
5389 const Elf_Internal_Rela *rel;
5390 const Elf_Internal_Rela *rel_end;
5391 asection *sreloc;
5392 struct elf_link_hash_entry *tga, *dottga;
5393 bfd_boolean is_opd;
5394
5395 if (bfd_link_relocatable (info))
5396 return TRUE;
5397
5398 /* Don't do anything special with non-loaded, non-alloced sections.
5399 In particular, any relocs in such sections should not affect GOT
5400 and PLT reference counting (ie. we don't allow them to create GOT
5401 or PLT entries), there's no possibility or desire to optimize TLS
5402 relocs, and there's not much point in propagating relocs to shared
5403 libs that the dynamic linker won't relocate. */
5404 if ((sec->flags & SEC_ALLOC) == 0)
5405 return TRUE;
5406
5407 BFD_ASSERT (is_ppc64_elf (abfd));
5408
5409 htab = ppc_hash_table (info);
5410 if (htab == NULL)
5411 return FALSE;
5412
5413 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
5414 FALSE, FALSE, TRUE);
5415 dottga = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
5416 FALSE, FALSE, TRUE);
5417 symtab_hdr = &elf_symtab_hdr (abfd);
5418 sym_hashes = elf_sym_hashes (abfd);
5419 sreloc = NULL;
5420 is_opd = ppc64_elf_section_data (sec)->sec_type == sec_opd;
5421 rel_end = relocs + sec->reloc_count;
5422 for (rel = relocs; rel < rel_end; rel++)
5423 {
5424 unsigned long r_symndx;
5425 struct elf_link_hash_entry *h;
5426 enum elf_ppc64_reloc_type r_type;
5427 int tls_type;
5428 struct _ppc64_elf_section_data *ppc64_sec;
5429 struct plt_entry **ifunc, **plt_list;
5430
5431 r_symndx = ELF64_R_SYM (rel->r_info);
5432 if (r_symndx < symtab_hdr->sh_info)
5433 h = NULL;
5434 else
5435 {
5436 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5437 h = elf_follow_link (h);
5438
5439 if (h == htab->elf.hgot)
5440 sec->has_toc_reloc = 1;
5441 }
5442
5443 tls_type = 0;
5444 ifunc = NULL;
5445 if (h != NULL)
5446 {
5447 if (h->type == STT_GNU_IFUNC)
5448 {
5449 h->needs_plt = 1;
5450 ifunc = &h->plt.plist;
5451 }
5452 }
5453 else
5454 {
5455 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5456 abfd, r_symndx);
5457 if (isym == NULL)
5458 return FALSE;
5459
5460 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
5461 {
5462 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
5463 rel->r_addend, PLT_IFUNC);
5464 if (ifunc == NULL)
5465 return FALSE;
5466 }
5467 }
5468
5469 r_type = ELF64_R_TYPE (rel->r_info);
5470 switch (r_type)
5471 {
5472 case R_PPC64_TLSGD:
5473 case R_PPC64_TLSLD:
5474 /* These special tls relocs tie a call to __tls_get_addr with
5475 its parameter symbol. */
5476 break;
5477
5478 case R_PPC64_GOT_TLSLD16:
5479 case R_PPC64_GOT_TLSLD16_LO:
5480 case R_PPC64_GOT_TLSLD16_HI:
5481 case R_PPC64_GOT_TLSLD16_HA:
5482 tls_type = TLS_TLS | TLS_LD;
5483 goto dogottls;
5484
5485 case R_PPC64_GOT_TLSGD16:
5486 case R_PPC64_GOT_TLSGD16_LO:
5487 case R_PPC64_GOT_TLSGD16_HI:
5488 case R_PPC64_GOT_TLSGD16_HA:
5489 tls_type = TLS_TLS | TLS_GD;
5490 goto dogottls;
5491
5492 case R_PPC64_GOT_TPREL16_DS:
5493 case R_PPC64_GOT_TPREL16_LO_DS:
5494 case R_PPC64_GOT_TPREL16_HI:
5495 case R_PPC64_GOT_TPREL16_HA:
5496 if (bfd_link_dll (info))
5497 info->flags |= DF_STATIC_TLS;
5498 tls_type = TLS_TLS | TLS_TPREL;
5499 goto dogottls;
5500
5501 case R_PPC64_GOT_DTPREL16_DS:
5502 case R_PPC64_GOT_DTPREL16_LO_DS:
5503 case R_PPC64_GOT_DTPREL16_HI:
5504 case R_PPC64_GOT_DTPREL16_HA:
5505 tls_type = TLS_TLS | TLS_DTPREL;
5506 dogottls:
5507 sec->has_tls_reloc = 1;
5508 /* Fall through */
5509
5510 case R_PPC64_GOT16:
5511 case R_PPC64_GOT16_DS:
5512 case R_PPC64_GOT16_HA:
5513 case R_PPC64_GOT16_HI:
5514 case R_PPC64_GOT16_LO:
5515 case R_PPC64_GOT16_LO_DS:
5516 /* This symbol requires a global offset table entry. */
5517 sec->has_toc_reloc = 1;
5518 if (r_type == R_PPC64_GOT_TLSLD16
5519 || r_type == R_PPC64_GOT_TLSGD16
5520 || r_type == R_PPC64_GOT_TPREL16_DS
5521 || r_type == R_PPC64_GOT_DTPREL16_DS
5522 || r_type == R_PPC64_GOT16
5523 || r_type == R_PPC64_GOT16_DS)
5524 {
5525 htab->do_multi_toc = 1;
5526 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5527 }
5528
5529 if (ppc64_elf_tdata (abfd)->got == NULL
5530 && !create_got_section (abfd, info))
5531 return FALSE;
5532
5533 if (h != NULL)
5534 {
5535 struct ppc_link_hash_entry *eh;
5536 struct got_entry *ent;
5537
5538 eh = (struct ppc_link_hash_entry *) h;
5539 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
5540 if (ent->addend == rel->r_addend
5541 && ent->owner == abfd
5542 && ent->tls_type == tls_type)
5543 break;
5544 if (ent == NULL)
5545 {
5546 bfd_size_type amt = sizeof (*ent);
5547 ent = bfd_alloc (abfd, amt);
5548 if (ent == NULL)
5549 return FALSE;
5550 ent->next = eh->elf.got.glist;
5551 ent->addend = rel->r_addend;
5552 ent->owner = abfd;
5553 ent->tls_type = tls_type;
5554 ent->is_indirect = FALSE;
5555 ent->got.refcount = 0;
5556 eh->elf.got.glist = ent;
5557 }
5558 ent->got.refcount += 1;
5559 eh->tls_mask |= tls_type;
5560 }
5561 else
5562 /* This is a global offset table entry for a local symbol. */
5563 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5564 rel->r_addend, tls_type))
5565 return FALSE;
5566
5567 /* We may also need a plt entry if the symbol turns out to be
5568 an ifunc. */
5569 if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1)
5570 {
5571 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5572 return FALSE;
5573 }
5574 break;
5575
5576 case R_PPC64_PLT16_HA:
5577 case R_PPC64_PLT16_HI:
5578 case R_PPC64_PLT16_LO:
5579 case R_PPC64_PLT32:
5580 case R_PPC64_PLT64:
5581 /* This symbol requires a procedure linkage table entry. */
5582 plt_list = ifunc;
5583 if (h != NULL)
5584 {
5585 h->needs_plt = 1;
5586 if (h->root.root.string[0] == '.'
5587 && h->root.root.string[1] != '\0')
5588 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5589 plt_list = &h->plt.plist;
5590 }
5591 if (plt_list == NULL)
5592 {
5593 /* It does not make sense to have a procedure linkage
5594 table entry for a non-ifunc local symbol. */
5595 info->callbacks->einfo
5596 /* xgettext:c-format */
5597 (_("%H: %s reloc against local symbol\n"),
5598 abfd, sec, rel->r_offset,
5599 ppc64_elf_howto_table[r_type]->name);
5600 bfd_set_error (bfd_error_bad_value);
5601 return FALSE;
5602 }
5603 if (!update_plt_info (abfd, plt_list, rel->r_addend))
5604 return FALSE;
5605 break;
5606
5607 /* The following relocations don't need to propagate the
5608 relocation if linking a shared object since they are
5609 section relative. */
5610 case R_PPC64_SECTOFF:
5611 case R_PPC64_SECTOFF_LO:
5612 case R_PPC64_SECTOFF_HI:
5613 case R_PPC64_SECTOFF_HA:
5614 case R_PPC64_SECTOFF_DS:
5615 case R_PPC64_SECTOFF_LO_DS:
5616 case R_PPC64_DTPREL16:
5617 case R_PPC64_DTPREL16_LO:
5618 case R_PPC64_DTPREL16_HI:
5619 case R_PPC64_DTPREL16_HA:
5620 case R_PPC64_DTPREL16_DS:
5621 case R_PPC64_DTPREL16_LO_DS:
5622 case R_PPC64_DTPREL16_HIGH:
5623 case R_PPC64_DTPREL16_HIGHA:
5624 case R_PPC64_DTPREL16_HIGHER:
5625 case R_PPC64_DTPREL16_HIGHERA:
5626 case R_PPC64_DTPREL16_HIGHEST:
5627 case R_PPC64_DTPREL16_HIGHESTA:
5628 break;
5629
5630 /* Nor do these. */
5631 case R_PPC64_REL16:
5632 case R_PPC64_REL16_LO:
5633 case R_PPC64_REL16_HI:
5634 case R_PPC64_REL16_HA:
5635 case R_PPC64_REL16DX_HA:
5636 break;
5637
5638 /* Not supported as a dynamic relocation. */
5639 case R_PPC64_ADDR64_LOCAL:
5640 if (bfd_link_pic (info))
5641 {
5642 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
5643 ppc_howto_init ();
5644 /* xgettext:c-format */
5645 info->callbacks->einfo (_("%H: %s reloc unsupported "
5646 "in shared libraries and PIEs.\n"),
5647 abfd, sec, rel->r_offset,
5648 ppc64_elf_howto_table[r_type]->name);
5649 bfd_set_error (bfd_error_bad_value);
5650 return FALSE;
5651 }
5652 break;
5653
5654 case R_PPC64_TOC16:
5655 case R_PPC64_TOC16_DS:
5656 htab->do_multi_toc = 1;
5657 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5658 /* Fall through. */
5659 case R_PPC64_TOC16_LO:
5660 case R_PPC64_TOC16_HI:
5661 case R_PPC64_TOC16_HA:
5662 case R_PPC64_TOC16_LO_DS:
5663 sec->has_toc_reloc = 1;
5664 break;
5665
5666 /* Marker reloc. */
5667 case R_PPC64_ENTRY:
5668 break;
5669
5670 /* This relocation describes the C++ object vtable hierarchy.
5671 Reconstruct it for later use during GC. */
5672 case R_PPC64_GNU_VTINHERIT:
5673 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
5674 return FALSE;
5675 break;
5676
5677 /* This relocation describes which C++ vtable entries are actually
5678 used. Record for later use during GC. */
5679 case R_PPC64_GNU_VTENTRY:
5680 BFD_ASSERT (h != NULL);
5681 if (h != NULL
5682 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
5683 return FALSE;
5684 break;
5685
5686 case R_PPC64_REL14:
5687 case R_PPC64_REL14_BRTAKEN:
5688 case R_PPC64_REL14_BRNTAKEN:
5689 {
5690 asection *dest = NULL;
5691
5692 /* Heuristic: If jumping outside our section, chances are
5693 we are going to need a stub. */
5694 if (h != NULL)
5695 {
5696 /* If the sym is weak it may be overridden later, so
5697 don't assume we know where a weak sym lives. */
5698 if (h->root.type == bfd_link_hash_defined)
5699 dest = h->root.u.def.section;
5700 }
5701 else
5702 {
5703 Elf_Internal_Sym *isym;
5704
5705 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5706 abfd, r_symndx);
5707 if (isym == NULL)
5708 return FALSE;
5709
5710 dest = bfd_section_from_elf_index (abfd, isym->st_shndx);
5711 }
5712
5713 if (dest != sec)
5714 ppc64_elf_section_data (sec)->has_14bit_branch = 1;
5715 }
5716 /* Fall through. */
5717
5718 case R_PPC64_REL24:
5719 plt_list = ifunc;
5720 if (h != NULL)
5721 {
5722 h->needs_plt = 1;
5723 if (h->root.root.string[0] == '.'
5724 && h->root.root.string[1] != '\0')
5725 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5726
5727 if (h == tga || h == dottga)
5728 {
5729 sec->has_tls_reloc = 1;
5730 if (rel != relocs
5731 && (ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSGD
5732 || ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSLD))
5733 /* We have a new-style __tls_get_addr call with
5734 a marker reloc. */
5735 ;
5736 else
5737 /* Mark this section as having an old-style call. */
5738 sec->has_tls_get_addr_call = 1;
5739 }
5740 plt_list = &h->plt.plist;
5741 }
5742
5743 /* We may need a .plt entry if the function this reloc
5744 refers to is in a shared lib. */
5745 if (plt_list
5746 && !update_plt_info (abfd, plt_list, rel->r_addend))
5747 return FALSE;
5748 break;
5749
5750 case R_PPC64_ADDR14:
5751 case R_PPC64_ADDR14_BRNTAKEN:
5752 case R_PPC64_ADDR14_BRTAKEN:
5753 case R_PPC64_ADDR24:
5754 goto dodyn;
5755
5756 case R_PPC64_TPREL64:
5757 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
5758 if (bfd_link_dll (info))
5759 info->flags |= DF_STATIC_TLS;
5760 goto dotlstoc;
5761
5762 case R_PPC64_DTPMOD64:
5763 if (rel + 1 < rel_end
5764 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
5765 && rel[1].r_offset == rel->r_offset + 8)
5766 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
5767 else
5768 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
5769 goto dotlstoc;
5770
5771 case R_PPC64_DTPREL64:
5772 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
5773 if (rel != relocs
5774 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
5775 && rel[-1].r_offset == rel->r_offset - 8)
5776 /* This is the second reloc of a dtpmod, dtprel pair.
5777 Don't mark with TLS_DTPREL. */
5778 goto dodyn;
5779
5780 dotlstoc:
5781 sec->has_tls_reloc = 1;
5782 if (h != NULL)
5783 {
5784 struct ppc_link_hash_entry *eh;
5785 eh = (struct ppc_link_hash_entry *) h;
5786 eh->tls_mask |= tls_type;
5787 }
5788 else
5789 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5790 rel->r_addend, tls_type))
5791 return FALSE;
5792
5793 ppc64_sec = ppc64_elf_section_data (sec);
5794 if (ppc64_sec->sec_type != sec_toc)
5795 {
5796 bfd_size_type amt;
5797
5798 /* One extra to simplify get_tls_mask. */
5799 amt = sec->size * sizeof (unsigned) / 8 + sizeof (unsigned);
5800 ppc64_sec->u.toc.symndx = bfd_zalloc (abfd, amt);
5801 if (ppc64_sec->u.toc.symndx == NULL)
5802 return FALSE;
5803 amt = sec->size * sizeof (bfd_vma) / 8;
5804 ppc64_sec->u.toc.add = bfd_zalloc (abfd, amt);
5805 if (ppc64_sec->u.toc.add == NULL)
5806 return FALSE;
5807 BFD_ASSERT (ppc64_sec->sec_type == sec_normal);
5808 ppc64_sec->sec_type = sec_toc;
5809 }
5810 BFD_ASSERT (rel->r_offset % 8 == 0);
5811 ppc64_sec->u.toc.symndx[rel->r_offset / 8] = r_symndx;
5812 ppc64_sec->u.toc.add[rel->r_offset / 8] = rel->r_addend;
5813
5814 /* Mark the second slot of a GD or LD entry.
5815 -1 to indicate GD and -2 to indicate LD. */
5816 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
5817 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -1;
5818 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
5819 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -2;
5820 goto dodyn;
5821
5822 case R_PPC64_TPREL16:
5823 case R_PPC64_TPREL16_LO:
5824 case R_PPC64_TPREL16_HI:
5825 case R_PPC64_TPREL16_HA:
5826 case R_PPC64_TPREL16_DS:
5827 case R_PPC64_TPREL16_LO_DS:
5828 case R_PPC64_TPREL16_HIGH:
5829 case R_PPC64_TPREL16_HIGHA:
5830 case R_PPC64_TPREL16_HIGHER:
5831 case R_PPC64_TPREL16_HIGHERA:
5832 case R_PPC64_TPREL16_HIGHEST:
5833 case R_PPC64_TPREL16_HIGHESTA:
5834 if (bfd_link_dll (info))
5835 info->flags |= DF_STATIC_TLS;
5836 goto dodyn;
5837
5838 case R_PPC64_ADDR64:
5839 if (is_opd
5840 && rel + 1 < rel_end
5841 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
5842 {
5843 if (h != NULL)
5844 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5845 }
5846 /* Fall through. */
5847
5848 case R_PPC64_ADDR16:
5849 case R_PPC64_ADDR16_DS:
5850 case R_PPC64_ADDR16_HA:
5851 case R_PPC64_ADDR16_HI:
5852 case R_PPC64_ADDR16_HIGH:
5853 case R_PPC64_ADDR16_HIGHA:
5854 case R_PPC64_ADDR16_HIGHER:
5855 case R_PPC64_ADDR16_HIGHERA:
5856 case R_PPC64_ADDR16_HIGHEST:
5857 case R_PPC64_ADDR16_HIGHESTA:
5858 case R_PPC64_ADDR16_LO:
5859 case R_PPC64_ADDR16_LO_DS:
5860 if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1
5861 && rel->r_addend == 0)
5862 {
5863 /* We may need a .plt entry if this reloc refers to a
5864 function in a shared lib. */
5865 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5866 return FALSE;
5867 h->pointer_equality_needed = 1;
5868 }
5869 /* Fall through. */
5870
5871 case R_PPC64_REL30:
5872 case R_PPC64_REL32:
5873 case R_PPC64_REL64:
5874 case R_PPC64_ADDR32:
5875 case R_PPC64_UADDR16:
5876 case R_PPC64_UADDR32:
5877 case R_PPC64_UADDR64:
5878 case R_PPC64_TOC:
5879 if (h != NULL && !bfd_link_pic (info))
5880 /* We may need a copy reloc. */
5881 h->non_got_ref = 1;
5882
5883 /* Don't propagate .opd relocs. */
5884 if (NO_OPD_RELOCS && is_opd)
5885 break;
5886
5887 /* If we are creating a shared library, and this is a reloc
5888 against a global symbol, or a non PC relative reloc
5889 against a local symbol, then we need to copy the reloc
5890 into the shared library. However, if we are linking with
5891 -Bsymbolic, we do not need to copy a reloc against a
5892 global symbol which is defined in an object we are
5893 including in the link (i.e., DEF_REGULAR is set). At
5894 this point we have not seen all the input files, so it is
5895 possible that DEF_REGULAR is not set now but will be set
5896 later (it is never cleared). In case of a weak definition,
5897 DEF_REGULAR may be cleared later by a strong definition in
5898 a shared library. We account for that possibility below by
5899 storing information in the dyn_relocs field of the hash
5900 table entry. A similar situation occurs when creating
5901 shared libraries and symbol visibility changes render the
5902 symbol local.
5903
5904 If on the other hand, we are creating an executable, we
5905 may need to keep relocations for symbols satisfied by a
5906 dynamic library if we manage to avoid copy relocs for the
5907 symbol. */
5908 dodyn:
5909 if ((bfd_link_pic (info)
5910 && (must_be_dyn_reloc (info, r_type)
5911 || (h != NULL
5912 && (!SYMBOLIC_BIND (info, h)
5913 || h->root.type == bfd_link_hash_defweak
5914 || !h->def_regular))))
5915 || (ELIMINATE_COPY_RELOCS
5916 && !bfd_link_pic (info)
5917 && h != NULL
5918 && (h->root.type == bfd_link_hash_defweak
5919 || !h->def_regular))
5920 || (!bfd_link_pic (info)
5921 && ifunc != NULL))
5922 {
5923 /* We must copy these reloc types into the output file.
5924 Create a reloc section in dynobj and make room for
5925 this reloc. */
5926 if (sreloc == NULL)
5927 {
5928 sreloc = _bfd_elf_make_dynamic_reloc_section
5929 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
5930
5931 if (sreloc == NULL)
5932 return FALSE;
5933 }
5934
5935 /* If this is a global symbol, we count the number of
5936 relocations we need for this symbol. */
5937 if (h != NULL)
5938 {
5939 struct elf_dyn_relocs *p;
5940 struct elf_dyn_relocs **head;
5941
5942 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
5943 p = *head;
5944 if (p == NULL || p->sec != sec)
5945 {
5946 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5947 if (p == NULL)
5948 return FALSE;
5949 p->next = *head;
5950 *head = p;
5951 p->sec = sec;
5952 p->count = 0;
5953 p->pc_count = 0;
5954 }
5955 p->count += 1;
5956 if (!must_be_dyn_reloc (info, r_type))
5957 p->pc_count += 1;
5958 }
5959 else
5960 {
5961 /* Track dynamic relocs needed for local syms too.
5962 We really need local syms available to do this
5963 easily. Oh well. */
5964 struct ppc_dyn_relocs *p;
5965 struct ppc_dyn_relocs **head;
5966 bfd_boolean is_ifunc;
5967 asection *s;
5968 void *vpp;
5969 Elf_Internal_Sym *isym;
5970
5971 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5972 abfd, r_symndx);
5973 if (isym == NULL)
5974 return FALSE;
5975
5976 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5977 if (s == NULL)
5978 s = sec;
5979
5980 vpp = &elf_section_data (s)->local_dynrel;
5981 head = (struct ppc_dyn_relocs **) vpp;
5982 is_ifunc = ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC;
5983 p = *head;
5984 if (p != NULL && p->sec == sec && p->ifunc != is_ifunc)
5985 p = p->next;
5986 if (p == NULL || p->sec != sec || p->ifunc != is_ifunc)
5987 {
5988 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5989 if (p == NULL)
5990 return FALSE;
5991 p->next = *head;
5992 *head = p;
5993 p->sec = sec;
5994 p->ifunc = is_ifunc;
5995 p->count = 0;
5996 }
5997 p->count += 1;
5998 }
5999 }
6000 break;
6001
6002 default:
6003 break;
6004 }
6005 }
6006
6007 return TRUE;
6008 }
6009
6010 /* Merge backend specific data from an object file to the output
6011 object file when linking. */
6012
6013 static bfd_boolean
6014 ppc64_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
6015 {
6016 bfd *obfd = info->output_bfd;
6017 unsigned long iflags, oflags;
6018
6019 if ((ibfd->flags & BFD_LINKER_CREATED) != 0)
6020 return TRUE;
6021
6022 if (!is_ppc64_elf (ibfd) || !is_ppc64_elf (obfd))
6023 return TRUE;
6024
6025 if (!_bfd_generic_verify_endian_match (ibfd, info))
6026 return FALSE;
6027
6028 iflags = elf_elfheader (ibfd)->e_flags;
6029 oflags = elf_elfheader (obfd)->e_flags;
6030
6031 if (iflags & ~EF_PPC64_ABI)
6032 {
6033 _bfd_error_handler
6034 /* xgettext:c-format */
6035 (_("%B uses unknown e_flags 0x%lx"), ibfd, iflags);
6036 bfd_set_error (bfd_error_bad_value);
6037 return FALSE;
6038 }
6039 else if (iflags != oflags && iflags != 0)
6040 {
6041 _bfd_error_handler
6042 /* xgettext:c-format */
6043 (_("%B: ABI version %ld is not compatible with ABI version %ld output"),
6044 ibfd, iflags, oflags);
6045 bfd_set_error (bfd_error_bad_value);
6046 return FALSE;
6047 }
6048
6049 _bfd_elf_ppc_merge_fp_attributes (ibfd, info);
6050
6051 /* Merge Tag_compatibility attributes and any common GNU ones. */
6052 _bfd_elf_merge_object_attributes (ibfd, info);
6053
6054 return TRUE;
6055 }
6056
6057 static bfd_boolean
6058 ppc64_elf_print_private_bfd_data (bfd *abfd, void *ptr)
6059 {
6060 /* Print normal ELF private data. */
6061 _bfd_elf_print_private_bfd_data (abfd, ptr);
6062
6063 if (elf_elfheader (abfd)->e_flags != 0)
6064 {
6065 FILE *file = ptr;
6066
6067 fprintf (file, _("private flags = 0x%lx:"),
6068 elf_elfheader (abfd)->e_flags);
6069
6070 if ((elf_elfheader (abfd)->e_flags & EF_PPC64_ABI) != 0)
6071 fprintf (file, _(" [abiv%ld]"),
6072 elf_elfheader (abfd)->e_flags & EF_PPC64_ABI);
6073 fputc ('\n', file);
6074 }
6075
6076 return TRUE;
6077 }
6078
6079 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
6080 of the code entry point, and its section, which must be in the same
6081 object as OPD_SEC. Returns (bfd_vma) -1 on error. */
6082
6083 static bfd_vma
6084 opd_entry_value (asection *opd_sec,
6085 bfd_vma offset,
6086 asection **code_sec,
6087 bfd_vma *code_off,
6088 bfd_boolean in_code_sec)
6089 {
6090 bfd *opd_bfd = opd_sec->owner;
6091 Elf_Internal_Rela *relocs;
6092 Elf_Internal_Rela *lo, *hi, *look;
6093 bfd_vma val;
6094
6095 /* No relocs implies we are linking a --just-symbols object, or looking
6096 at a final linked executable with addr2line or somesuch. */
6097 if (opd_sec->reloc_count == 0)
6098 {
6099 bfd_byte *contents = ppc64_elf_tdata (opd_bfd)->opd.contents;
6100
6101 if (contents == NULL)
6102 {
6103 if (!bfd_malloc_and_get_section (opd_bfd, opd_sec, &contents))
6104 return (bfd_vma) -1;
6105 ppc64_elf_tdata (opd_bfd)->opd.contents = contents;
6106 }
6107
6108 /* PR 17512: file: 64b9dfbb. */
6109 if (offset + 7 >= opd_sec->size || offset + 7 < offset)
6110 return (bfd_vma) -1;
6111
6112 val = bfd_get_64 (opd_bfd, contents + offset);
6113 if (code_sec != NULL)
6114 {
6115 asection *sec, *likely = NULL;
6116
6117 if (in_code_sec)
6118 {
6119 sec = *code_sec;
6120 if (sec->vma <= val
6121 && val < sec->vma + sec->size)
6122 likely = sec;
6123 else
6124 val = -1;
6125 }
6126 else
6127 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
6128 if (sec->vma <= val
6129 && (sec->flags & SEC_LOAD) != 0
6130 && (sec->flags & SEC_ALLOC) != 0)
6131 likely = sec;
6132 if (likely != NULL)
6133 {
6134 *code_sec = likely;
6135 if (code_off != NULL)
6136 *code_off = val - likely->vma;
6137 }
6138 }
6139 return val;
6140 }
6141
6142 BFD_ASSERT (is_ppc64_elf (opd_bfd));
6143
6144 relocs = ppc64_elf_tdata (opd_bfd)->opd.relocs;
6145 if (relocs == NULL)
6146 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
6147 /* PR 17512: file: df8e1fd6. */
6148 if (relocs == NULL)
6149 return (bfd_vma) -1;
6150
6151 /* Go find the opd reloc at the sym address. */
6152 lo = relocs;
6153 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
6154 val = (bfd_vma) -1;
6155 while (lo < hi)
6156 {
6157 look = lo + (hi - lo) / 2;
6158 if (look->r_offset < offset)
6159 lo = look + 1;
6160 else if (look->r_offset > offset)
6161 hi = look;
6162 else
6163 {
6164 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (opd_bfd);
6165
6166 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
6167 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
6168 {
6169 unsigned long symndx = ELF64_R_SYM (look->r_info);
6170 asection *sec = NULL;
6171
6172 if (symndx >= symtab_hdr->sh_info
6173 && elf_sym_hashes (opd_bfd) != NULL)
6174 {
6175 struct elf_link_hash_entry **sym_hashes;
6176 struct elf_link_hash_entry *rh;
6177
6178 sym_hashes = elf_sym_hashes (opd_bfd);
6179 rh = sym_hashes[symndx - symtab_hdr->sh_info];
6180 if (rh != NULL)
6181 {
6182 rh = elf_follow_link (rh);
6183 if (rh->root.type != bfd_link_hash_defined
6184 && rh->root.type != bfd_link_hash_defweak)
6185 break;
6186 if (rh->root.u.def.section->owner == opd_bfd)
6187 {
6188 val = rh->root.u.def.value;
6189 sec = rh->root.u.def.section;
6190 }
6191 }
6192 }
6193
6194 if (sec == NULL)
6195 {
6196 Elf_Internal_Sym *sym;
6197
6198 if (symndx < symtab_hdr->sh_info)
6199 {
6200 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
6201 if (sym == NULL)
6202 {
6203 size_t symcnt = symtab_hdr->sh_info;
6204 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
6205 symcnt, 0,
6206 NULL, NULL, NULL);
6207 if (sym == NULL)
6208 break;
6209 symtab_hdr->contents = (bfd_byte *) sym;
6210 }
6211 sym += symndx;
6212 }
6213 else
6214 {
6215 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
6216 1, symndx,
6217 NULL, NULL, NULL);
6218 if (sym == NULL)
6219 break;
6220 }
6221 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
6222 if (sec == NULL)
6223 break;
6224 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
6225 val = sym->st_value;
6226 }
6227
6228 val += look->r_addend;
6229 if (code_off != NULL)
6230 *code_off = val;
6231 if (code_sec != NULL)
6232 {
6233 if (in_code_sec && *code_sec != sec)
6234 return -1;
6235 else
6236 *code_sec = sec;
6237 }
6238 if (sec->output_section != NULL)
6239 val += sec->output_section->vma + sec->output_offset;
6240 }
6241 break;
6242 }
6243 }
6244
6245 return val;
6246 }
6247
6248 /* If the ELF symbol SYM might be a function in SEC, return the
6249 function size and set *CODE_OFF to the function's entry point,
6250 otherwise return zero. */
6251
6252 static bfd_size_type
6253 ppc64_elf_maybe_function_sym (const asymbol *sym, asection *sec,
6254 bfd_vma *code_off)
6255 {
6256 bfd_size_type size;
6257
6258 if ((sym->flags & (BSF_SECTION_SYM | BSF_FILE | BSF_OBJECT
6259 | BSF_THREAD_LOCAL | BSF_RELC | BSF_SRELC)) != 0)
6260 return 0;
6261
6262 size = 0;
6263 if (!(sym->flags & BSF_SYNTHETIC))
6264 size = ((elf_symbol_type *) sym)->internal_elf_sym.st_size;
6265
6266 if (strcmp (sym->section->name, ".opd") == 0)
6267 {
6268 struct _opd_sec_data *opd = get_opd_info (sym->section);
6269 bfd_vma symval = sym->value;
6270
6271 if (opd != NULL
6272 && opd->adjust != NULL
6273 && elf_section_data (sym->section)->relocs != NULL)
6274 {
6275 /* opd_entry_value will use cached relocs that have been
6276 adjusted, but with raw symbols. That means both local
6277 and global symbols need adjusting. */
6278 long adjust = opd->adjust[OPD_NDX (symval)];
6279 if (adjust == -1)
6280 return 0;
6281 symval += adjust;
6282 }
6283
6284 if (opd_entry_value (sym->section, symval,
6285 &sec, code_off, TRUE) == (bfd_vma) -1)
6286 return 0;
6287 /* An old ABI binary with dot-syms has a size of 24 on the .opd
6288 symbol. This size has nothing to do with the code size of the
6289 function, which is what we're supposed to return, but the
6290 code size isn't available without looking up the dot-sym.
6291 However, doing that would be a waste of time particularly
6292 since elf_find_function will look at the dot-sym anyway.
6293 Now, elf_find_function will keep the largest size of any
6294 function sym found at the code address of interest, so return
6295 1 here to avoid it incorrectly caching a larger function size
6296 for a small function. This does mean we return the wrong
6297 size for a new-ABI function of size 24, but all that does is
6298 disable caching for such functions. */
6299 if (size == 24)
6300 size = 1;
6301 }
6302 else
6303 {
6304 if (sym->section != sec)
6305 return 0;
6306 *code_off = sym->value;
6307 }
6308 if (size == 0)
6309 size = 1;
6310 return size;
6311 }
6312
6313 /* Return true if symbol is a strong function defined in an ELFv2
6314 object with st_other localentry bits of zero, ie. its local entry
6315 point coincides with its global entry point. */
6316
6317 static bfd_boolean
6318 is_elfv2_localentry0 (struct elf_link_hash_entry *h)
6319 {
6320 return (h != NULL
6321 && h->type == STT_FUNC
6322 && h->root.type == bfd_link_hash_defined
6323 && (STO_PPC64_LOCAL_MASK & h->other) == 0
6324 && !((struct ppc_link_hash_entry *) h)->non_zero_localentry
6325 && is_ppc64_elf (h->root.u.def.section->owner)
6326 && abiversion (h->root.u.def.section->owner) >= 2);
6327 }
6328
6329 /* Return true if symbol is defined in a regular object file. */
6330
6331 static bfd_boolean
6332 is_static_defined (struct elf_link_hash_entry *h)
6333 {
6334 return ((h->root.type == bfd_link_hash_defined
6335 || h->root.type == bfd_link_hash_defweak)
6336 && h->root.u.def.section != NULL
6337 && h->root.u.def.section->output_section != NULL);
6338 }
6339
6340 /* If FDH is a function descriptor symbol, return the associated code
6341 entry symbol if it is defined. Return NULL otherwise. */
6342
6343 static struct ppc_link_hash_entry *
6344 defined_code_entry (struct ppc_link_hash_entry *fdh)
6345 {
6346 if (fdh->is_func_descriptor)
6347 {
6348 struct ppc_link_hash_entry *fh = ppc_follow_link (fdh->oh);
6349 if (fh->elf.root.type == bfd_link_hash_defined
6350 || fh->elf.root.type == bfd_link_hash_defweak)
6351 return fh;
6352 }
6353 return NULL;
6354 }
6355
6356 /* If FH is a function code entry symbol, return the associated
6357 function descriptor symbol if it is defined. Return NULL otherwise. */
6358
6359 static struct ppc_link_hash_entry *
6360 defined_func_desc (struct ppc_link_hash_entry *fh)
6361 {
6362 if (fh->oh != NULL
6363 && fh->oh->is_func_descriptor)
6364 {
6365 struct ppc_link_hash_entry *fdh = ppc_follow_link (fh->oh);
6366 if (fdh->elf.root.type == bfd_link_hash_defined
6367 || fdh->elf.root.type == bfd_link_hash_defweak)
6368 return fdh;
6369 }
6370 return NULL;
6371 }
6372
6373 static bfd_boolean func_desc_adjust (struct elf_link_hash_entry *, void *);
6374
6375 /* Garbage collect sections, after first dealing with dot-symbols. */
6376
6377 static bfd_boolean
6378 ppc64_elf_gc_sections (bfd *abfd, struct bfd_link_info *info)
6379 {
6380 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6381
6382 if (htab != NULL && htab->need_func_desc_adj)
6383 {
6384 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
6385 htab->need_func_desc_adj = 0;
6386 }
6387 return bfd_elf_gc_sections (abfd, info);
6388 }
6389
6390 /* Mark all our entry sym sections, both opd and code section. */
6391
6392 static void
6393 ppc64_elf_gc_keep (struct bfd_link_info *info)
6394 {
6395 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6396 struct bfd_sym_chain *sym;
6397
6398 if (htab == NULL)
6399 return;
6400
6401 for (sym = info->gc_sym_list; sym != NULL; sym = sym->next)
6402 {
6403 struct ppc_link_hash_entry *eh, *fh;
6404 asection *sec;
6405
6406 eh = (struct ppc_link_hash_entry *)
6407 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, TRUE);
6408 if (eh == NULL)
6409 continue;
6410 if (eh->elf.root.type != bfd_link_hash_defined
6411 && eh->elf.root.type != bfd_link_hash_defweak)
6412 continue;
6413
6414 fh = defined_code_entry (eh);
6415 if (fh != NULL)
6416 {
6417 sec = fh->elf.root.u.def.section;
6418 sec->flags |= SEC_KEEP;
6419 }
6420 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6421 && opd_entry_value (eh->elf.root.u.def.section,
6422 eh->elf.root.u.def.value,
6423 &sec, NULL, FALSE) != (bfd_vma) -1)
6424 sec->flags |= SEC_KEEP;
6425
6426 sec = eh->elf.root.u.def.section;
6427 sec->flags |= SEC_KEEP;
6428 }
6429 }
6430
6431 /* Mark sections containing dynamically referenced symbols. When
6432 building shared libraries, we must assume that any visible symbol is
6433 referenced. */
6434
6435 static bfd_boolean
6436 ppc64_elf_gc_mark_dynamic_ref (struct elf_link_hash_entry *h, void *inf)
6437 {
6438 struct bfd_link_info *info = (struct bfd_link_info *) inf;
6439 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
6440 struct ppc_link_hash_entry *fdh;
6441 struct bfd_elf_dynamic_list *d = info->dynamic_list;
6442
6443 /* Dynamic linking info is on the func descriptor sym. */
6444 fdh = defined_func_desc (eh);
6445 if (fdh != NULL)
6446 eh = fdh;
6447
6448 if ((eh->elf.root.type == bfd_link_hash_defined
6449 || eh->elf.root.type == bfd_link_hash_defweak)
6450 && (eh->elf.ref_dynamic
6451 || ((eh->elf.def_regular || ELF_COMMON_DEF_P (&eh->elf))
6452 && ELF_ST_VISIBILITY (eh->elf.other) != STV_INTERNAL
6453 && ELF_ST_VISIBILITY (eh->elf.other) != STV_HIDDEN
6454 && (!bfd_link_executable (info)
6455 || info->gc_keep_exported
6456 || info->export_dynamic
6457 || (eh->elf.dynamic
6458 && d != NULL
6459 && (*d->match) (&d->head, NULL, eh->elf.root.root.string)))
6460 && (eh->elf.versioned >= versioned
6461 || !bfd_hide_sym_by_version (info->version_info,
6462 eh->elf.root.root.string)))))
6463 {
6464 asection *code_sec;
6465 struct ppc_link_hash_entry *fh;
6466
6467 eh->elf.root.u.def.section->flags |= SEC_KEEP;
6468
6469 /* Function descriptor syms cause the associated
6470 function code sym section to be marked. */
6471 fh = defined_code_entry (eh);
6472 if (fh != NULL)
6473 {
6474 code_sec = fh->elf.root.u.def.section;
6475 code_sec->flags |= SEC_KEEP;
6476 }
6477 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6478 && opd_entry_value (eh->elf.root.u.def.section,
6479 eh->elf.root.u.def.value,
6480 &code_sec, NULL, FALSE) != (bfd_vma) -1)
6481 code_sec->flags |= SEC_KEEP;
6482 }
6483
6484 return TRUE;
6485 }
6486
6487 /* Return the section that should be marked against GC for a given
6488 relocation. */
6489
6490 static asection *
6491 ppc64_elf_gc_mark_hook (asection *sec,
6492 struct bfd_link_info *info,
6493 Elf_Internal_Rela *rel,
6494 struct elf_link_hash_entry *h,
6495 Elf_Internal_Sym *sym)
6496 {
6497 asection *rsec;
6498
6499 /* Syms return NULL if we're marking .opd, so we avoid marking all
6500 function sections, as all functions are referenced in .opd. */
6501 rsec = NULL;
6502 if (get_opd_info (sec) != NULL)
6503 return rsec;
6504
6505 if (h != NULL)
6506 {
6507 enum elf_ppc64_reloc_type r_type;
6508 struct ppc_link_hash_entry *eh, *fh, *fdh;
6509
6510 r_type = ELF64_R_TYPE (rel->r_info);
6511 switch (r_type)
6512 {
6513 case R_PPC64_GNU_VTINHERIT:
6514 case R_PPC64_GNU_VTENTRY:
6515 break;
6516
6517 default:
6518 switch (h->root.type)
6519 {
6520 case bfd_link_hash_defined:
6521 case bfd_link_hash_defweak:
6522 eh = (struct ppc_link_hash_entry *) h;
6523 fdh = defined_func_desc (eh);
6524 if (fdh != NULL)
6525 {
6526 /* -mcall-aixdesc code references the dot-symbol on
6527 a call reloc. Mark the function descriptor too
6528 against garbage collection. */
6529 fdh->elf.mark = 1;
6530 if (fdh->elf.is_weakalias)
6531 weakdef (&fdh->elf)->mark = 1;
6532 eh = fdh;
6533 }
6534
6535 /* Function descriptor syms cause the associated
6536 function code sym section to be marked. */
6537 fh = defined_code_entry (eh);
6538 if (fh != NULL)
6539 {
6540 /* They also mark their opd section. */
6541 eh->elf.root.u.def.section->gc_mark = 1;
6542
6543 rsec = fh->elf.root.u.def.section;
6544 }
6545 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6546 && opd_entry_value (eh->elf.root.u.def.section,
6547 eh->elf.root.u.def.value,
6548 &rsec, NULL, FALSE) != (bfd_vma) -1)
6549 eh->elf.root.u.def.section->gc_mark = 1;
6550 else
6551 rsec = h->root.u.def.section;
6552 break;
6553
6554 case bfd_link_hash_common:
6555 rsec = h->root.u.c.p->section;
6556 break;
6557
6558 default:
6559 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
6560 }
6561 }
6562 }
6563 else
6564 {
6565 struct _opd_sec_data *opd;
6566
6567 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
6568 opd = get_opd_info (rsec);
6569 if (opd != NULL && opd->func_sec != NULL)
6570 {
6571 rsec->gc_mark = 1;
6572
6573 rsec = opd->func_sec[OPD_NDX (sym->st_value + rel->r_addend)];
6574 }
6575 }
6576
6577 return rsec;
6578 }
6579
6580 /* The maximum size of .sfpr. */
6581 #define SFPR_MAX (218*4)
6582
6583 struct sfpr_def_parms
6584 {
6585 const char name[12];
6586 unsigned char lo, hi;
6587 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
6588 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
6589 };
6590
6591 /* Auto-generate _save*, _rest* functions in .sfpr.
6592 If STUB_SEC is non-null, define alias symbols in STUB_SEC
6593 instead. */
6594
6595 static bfd_boolean
6596 sfpr_define (struct bfd_link_info *info,
6597 const struct sfpr_def_parms *parm,
6598 asection *stub_sec)
6599 {
6600 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6601 unsigned int i;
6602 size_t len = strlen (parm->name);
6603 bfd_boolean writing = FALSE;
6604 char sym[16];
6605
6606 if (htab == NULL)
6607 return FALSE;
6608
6609 memcpy (sym, parm->name, len);
6610 sym[len + 2] = 0;
6611
6612 for (i = parm->lo; i <= parm->hi; i++)
6613 {
6614 struct ppc_link_hash_entry *h;
6615
6616 sym[len + 0] = i / 10 + '0';
6617 sym[len + 1] = i % 10 + '0';
6618 h = (struct ppc_link_hash_entry *)
6619 elf_link_hash_lookup (&htab->elf, sym, writing, TRUE, TRUE);
6620 if (stub_sec != NULL)
6621 {
6622 if (h != NULL
6623 && h->elf.root.type == bfd_link_hash_defined
6624 && h->elf.root.u.def.section == htab->sfpr)
6625 {
6626 struct elf_link_hash_entry *s;
6627 char buf[32];
6628 sprintf (buf, "%08x.%s", stub_sec->id & 0xffffffff, sym);
6629 s = elf_link_hash_lookup (&htab->elf, buf, TRUE, TRUE, FALSE);
6630 if (s == NULL)
6631 return FALSE;
6632 if (s->root.type == bfd_link_hash_new
6633 || (s->root.type = bfd_link_hash_defined
6634 && s->root.u.def.section == stub_sec))
6635 {
6636 s->root.type = bfd_link_hash_defined;
6637 s->root.u.def.section = stub_sec;
6638 s->root.u.def.value = (stub_sec->size
6639 + h->elf.root.u.def.value);
6640 s->ref_regular = 1;
6641 s->def_regular = 1;
6642 s->ref_regular_nonweak = 1;
6643 s->forced_local = 1;
6644 s->non_elf = 0;
6645 s->root.linker_def = 1;
6646 }
6647 }
6648 continue;
6649 }
6650 if (h != NULL)
6651 {
6652 h->save_res = 1;
6653 if (!h->elf.def_regular)
6654 {
6655 h->elf.root.type = bfd_link_hash_defined;
6656 h->elf.root.u.def.section = htab->sfpr;
6657 h->elf.root.u.def.value = htab->sfpr->size;
6658 h->elf.type = STT_FUNC;
6659 h->elf.def_regular = 1;
6660 h->elf.non_elf = 0;
6661 _bfd_elf_link_hash_hide_symbol (info, &h->elf, TRUE);
6662 writing = TRUE;
6663 if (htab->sfpr->contents == NULL)
6664 {
6665 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
6666 if (htab->sfpr->contents == NULL)
6667 return FALSE;
6668 }
6669 }
6670 }
6671 if (writing)
6672 {
6673 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
6674 if (i != parm->hi)
6675 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
6676 else
6677 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
6678 htab->sfpr->size = p - htab->sfpr->contents;
6679 }
6680 }
6681
6682 return TRUE;
6683 }
6684
6685 static bfd_byte *
6686 savegpr0 (bfd *abfd, bfd_byte *p, int r)
6687 {
6688 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6689 return p + 4;
6690 }
6691
6692 static bfd_byte *
6693 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
6694 {
6695 p = savegpr0 (abfd, p, r);
6696 bfd_put_32 (abfd, STD_R0_0R1 + STK_LR, p);
6697 p = p + 4;
6698 bfd_put_32 (abfd, BLR, p);
6699 return p + 4;
6700 }
6701
6702 static bfd_byte *
6703 restgpr0 (bfd *abfd, bfd_byte *p, int r)
6704 {
6705 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6706 return p + 4;
6707 }
6708
6709 static bfd_byte *
6710 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
6711 {
6712 bfd_put_32 (abfd, LD_R0_0R1 + STK_LR, p);
6713 p = p + 4;
6714 p = restgpr0 (abfd, p, r);
6715 bfd_put_32 (abfd, MTLR_R0, p);
6716 p = p + 4;
6717 if (r == 29)
6718 {
6719 p = restgpr0 (abfd, p, 30);
6720 p = restgpr0 (abfd, p, 31);
6721 }
6722 bfd_put_32 (abfd, BLR, p);
6723 return p + 4;
6724 }
6725
6726 static bfd_byte *
6727 savegpr1 (bfd *abfd, bfd_byte *p, int r)
6728 {
6729 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6730 return p + 4;
6731 }
6732
6733 static bfd_byte *
6734 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
6735 {
6736 p = savegpr1 (abfd, p, r);
6737 bfd_put_32 (abfd, BLR, p);
6738 return p + 4;
6739 }
6740
6741 static bfd_byte *
6742 restgpr1 (bfd *abfd, bfd_byte *p, int r)
6743 {
6744 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6745 return p + 4;
6746 }
6747
6748 static bfd_byte *
6749 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
6750 {
6751 p = restgpr1 (abfd, p, r);
6752 bfd_put_32 (abfd, BLR, p);
6753 return p + 4;
6754 }
6755
6756 static bfd_byte *
6757 savefpr (bfd *abfd, bfd_byte *p, int r)
6758 {
6759 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6760 return p + 4;
6761 }
6762
6763 static bfd_byte *
6764 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
6765 {
6766 p = savefpr (abfd, p, r);
6767 bfd_put_32 (abfd, STD_R0_0R1 + STK_LR, p);
6768 p = p + 4;
6769 bfd_put_32 (abfd, BLR, p);
6770 return p + 4;
6771 }
6772
6773 static bfd_byte *
6774 restfpr (bfd *abfd, bfd_byte *p, int r)
6775 {
6776 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6777 return p + 4;
6778 }
6779
6780 static bfd_byte *
6781 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
6782 {
6783 bfd_put_32 (abfd, LD_R0_0R1 + STK_LR, p);
6784 p = p + 4;
6785 p = restfpr (abfd, p, r);
6786 bfd_put_32 (abfd, MTLR_R0, p);
6787 p = p + 4;
6788 if (r == 29)
6789 {
6790 p = restfpr (abfd, p, 30);
6791 p = restfpr (abfd, p, 31);
6792 }
6793 bfd_put_32 (abfd, BLR, p);
6794 return p + 4;
6795 }
6796
6797 static bfd_byte *
6798 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
6799 {
6800 p = savefpr (abfd, p, r);
6801 bfd_put_32 (abfd, BLR, p);
6802 return p + 4;
6803 }
6804
6805 static bfd_byte *
6806 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
6807 {
6808 p = restfpr (abfd, p, r);
6809 bfd_put_32 (abfd, BLR, p);
6810 return p + 4;
6811 }
6812
6813 static bfd_byte *
6814 savevr (bfd *abfd, bfd_byte *p, int r)
6815 {
6816 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6817 p = p + 4;
6818 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
6819 return p + 4;
6820 }
6821
6822 static bfd_byte *
6823 savevr_tail (bfd *abfd, bfd_byte *p, int r)
6824 {
6825 p = savevr (abfd, p, r);
6826 bfd_put_32 (abfd, BLR, p);
6827 return p + 4;
6828 }
6829
6830 static bfd_byte *
6831 restvr (bfd *abfd, bfd_byte *p, int r)
6832 {
6833 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6834 p = p + 4;
6835 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
6836 return p + 4;
6837 }
6838
6839 static bfd_byte *
6840 restvr_tail (bfd *abfd, bfd_byte *p, int r)
6841 {
6842 p = restvr (abfd, p, r);
6843 bfd_put_32 (abfd, BLR, p);
6844 return p + 4;
6845 }
6846
6847 /* Called via elf_link_hash_traverse to transfer dynamic linking
6848 information on function code symbol entries to their corresponding
6849 function descriptor symbol entries. */
6850
6851 static bfd_boolean
6852 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
6853 {
6854 struct bfd_link_info *info;
6855 struct ppc_link_hash_table *htab;
6856 struct ppc_link_hash_entry *fh;
6857 struct ppc_link_hash_entry *fdh;
6858 bfd_boolean force_local;
6859
6860 fh = (struct ppc_link_hash_entry *) h;
6861 if (fh->elf.root.type == bfd_link_hash_indirect)
6862 return TRUE;
6863
6864 if (!fh->is_func)
6865 return TRUE;
6866
6867 if (fh->elf.root.root.string[0] != '.'
6868 || fh->elf.root.root.string[1] == '\0')
6869 return TRUE;
6870
6871 info = inf;
6872 htab = ppc_hash_table (info);
6873 if (htab == NULL)
6874 return FALSE;
6875
6876 /* Find the corresponding function descriptor symbol. */
6877 fdh = lookup_fdh (fh, htab);
6878
6879 /* Resolve undefined references to dot-symbols as the value
6880 in the function descriptor, if we have one in a regular object.
6881 This is to satisfy cases like ".quad .foo". Calls to functions
6882 in dynamic objects are handled elsewhere. */
6883 if ((fh->elf.root.type == bfd_link_hash_undefined
6884 || fh->elf.root.type == bfd_link_hash_undefweak)
6885 && (fdh->elf.root.type == bfd_link_hash_defined
6886 || fdh->elf.root.type == bfd_link_hash_defweak)
6887 && get_opd_info (fdh->elf.root.u.def.section) != NULL
6888 && opd_entry_value (fdh->elf.root.u.def.section,
6889 fdh->elf.root.u.def.value,
6890 &fh->elf.root.u.def.section,
6891 &fh->elf.root.u.def.value, FALSE) != (bfd_vma) -1)
6892 {
6893 fh->elf.root.type = fdh->elf.root.type;
6894 fh->elf.forced_local = 1;
6895 fh->elf.def_regular = fdh->elf.def_regular;
6896 fh->elf.def_dynamic = fdh->elf.def_dynamic;
6897 }
6898
6899 if (!fh->elf.dynamic)
6900 {
6901 struct plt_entry *ent;
6902
6903 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
6904 if (ent->plt.refcount > 0)
6905 break;
6906 if (ent == NULL)
6907 return TRUE;
6908 }
6909
6910 /* Create a descriptor as undefined if necessary. */
6911 if (fdh == NULL
6912 && !bfd_link_executable (info)
6913 && (fh->elf.root.type == bfd_link_hash_undefined
6914 || fh->elf.root.type == bfd_link_hash_undefweak))
6915 {
6916 fdh = make_fdh (info, fh);
6917 if (fdh == NULL)
6918 return FALSE;
6919 }
6920
6921 /* We can't support overriding of symbols on a fake descriptor. */
6922 if (fdh != NULL
6923 && fdh->fake
6924 && (fh->elf.root.type == bfd_link_hash_defined
6925 || fh->elf.root.type == bfd_link_hash_defweak))
6926 _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE);
6927
6928 /* Transfer dynamic linking information to the function descriptor. */
6929 if (fdh != NULL)
6930 {
6931 fdh->elf.ref_regular |= fh->elf.ref_regular;
6932 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
6933 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
6934 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
6935 fdh->elf.dynamic |= fh->elf.dynamic;
6936 fdh->elf.needs_plt |= (fh->elf.needs_plt
6937 || fh->elf.type == STT_FUNC
6938 || fh->elf.type == STT_GNU_IFUNC);
6939 move_plt_plist (fh, fdh);
6940
6941 if (!fdh->elf.forced_local
6942 && fh->elf.dynindx != -1)
6943 if (!bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
6944 return FALSE;
6945 }
6946
6947 /* Now that the info is on the function descriptor, clear the
6948 function code sym info. Any function code syms for which we
6949 don't have a definition in a regular file, we force local.
6950 This prevents a shared library from exporting syms that have
6951 been imported from another library. Function code syms that
6952 are really in the library we must leave global to prevent the
6953 linker dragging in a definition from a static library. */
6954 force_local = (!fh->elf.def_regular
6955 || fdh == NULL
6956 || !fdh->elf.def_regular
6957 || fdh->elf.forced_local);
6958 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
6959
6960 return TRUE;
6961 }
6962
6963 static const struct sfpr_def_parms save_res_funcs[] =
6964 {
6965 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
6966 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
6967 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
6968 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
6969 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
6970 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
6971 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
6972 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
6973 { "._savef", 14, 31, savefpr, savefpr1_tail },
6974 { "._restf", 14, 31, restfpr, restfpr1_tail },
6975 { "_savevr_", 20, 31, savevr, savevr_tail },
6976 { "_restvr_", 20, 31, restvr, restvr_tail }
6977 };
6978
6979 /* Called near the start of bfd_elf_size_dynamic_sections. We use
6980 this hook to a) provide some gcc support functions, and b) transfer
6981 dynamic linking information gathered so far on function code symbol
6982 entries, to their corresponding function descriptor symbol entries. */
6983
6984 static bfd_boolean
6985 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
6986 struct bfd_link_info *info)
6987 {
6988 struct ppc_link_hash_table *htab;
6989
6990 htab = ppc_hash_table (info);
6991 if (htab == NULL)
6992 return FALSE;
6993
6994 /* Provide any missing _save* and _rest* functions. */
6995 if (htab->sfpr != NULL)
6996 {
6997 unsigned int i;
6998
6999 htab->sfpr->size = 0;
7000 for (i = 0; i < ARRAY_SIZE (save_res_funcs); i++)
7001 if (!sfpr_define (info, &save_res_funcs[i], NULL))
7002 return FALSE;
7003 if (htab->sfpr->size == 0)
7004 htab->sfpr->flags |= SEC_EXCLUDE;
7005 }
7006
7007 if (bfd_link_relocatable (info))
7008 return TRUE;
7009
7010 if (htab->elf.hgot != NULL)
7011 {
7012 _bfd_elf_link_hash_hide_symbol (info, htab->elf.hgot, TRUE);
7013 /* Make .TOC. defined so as to prevent it being made dynamic.
7014 The wrong value here is fixed later in ppc64_elf_set_toc. */
7015 if (!htab->elf.hgot->def_regular
7016 || htab->elf.hgot->root.type != bfd_link_hash_defined)
7017 {
7018 htab->elf.hgot->root.type = bfd_link_hash_defined;
7019 htab->elf.hgot->root.u.def.value = 0;
7020 htab->elf.hgot->root.u.def.section = bfd_abs_section_ptr;
7021 htab->elf.hgot->def_regular = 1;
7022 htab->elf.hgot->root.linker_def = 1;
7023 }
7024 htab->elf.hgot->type = STT_OBJECT;
7025 htab->elf.hgot->other = ((htab->elf.hgot->other & ~ELF_ST_VISIBILITY (-1))
7026 | STV_HIDDEN);
7027 }
7028
7029 if (htab->need_func_desc_adj)
7030 {
7031 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
7032 htab->need_func_desc_adj = 0;
7033 }
7034
7035 return TRUE;
7036 }
7037
7038 /* Find dynamic relocs for H that apply to read-only sections. */
7039
7040 static asection *
7041 readonly_dynrelocs (struct elf_link_hash_entry *h)
7042 {
7043 struct ppc_link_hash_entry *eh;
7044 struct elf_dyn_relocs *p;
7045
7046 eh = (struct ppc_link_hash_entry *) h;
7047 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7048 {
7049 asection *s = p->sec->output_section;
7050
7051 if (s != NULL && (s->flags & SEC_READONLY) != 0)
7052 return p->sec;
7053 }
7054 return NULL;
7055 }
7056
7057 /* Return true if we have dynamic relocs against H or any of its weak
7058 aliases, that apply to read-only sections. Cannot be used after
7059 size_dynamic_sections. */
7060
7061 static bfd_boolean
7062 alias_readonly_dynrelocs (struct elf_link_hash_entry *h)
7063 {
7064 struct ppc_link_hash_entry *eh;
7065
7066 eh = (struct ppc_link_hash_entry *) h;
7067 do
7068 {
7069 if (readonly_dynrelocs (&eh->elf))
7070 return TRUE;
7071 eh = (struct ppc_link_hash_entry *) eh->elf.u.alias;
7072 } while (eh != NULL && &eh->elf != h);
7073
7074 return FALSE;
7075 }
7076
7077 /* Return whether EH has pc-relative dynamic relocs. */
7078
7079 static bfd_boolean
7080 pc_dynrelocs (struct ppc_link_hash_entry *eh)
7081 {
7082 struct elf_dyn_relocs *p;
7083
7084 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7085 if (p->pc_count != 0)
7086 return TRUE;
7087 return FALSE;
7088 }
7089
7090 /* Return true if a global entry stub will be created for H. Valid
7091 for ELFv2 before plt entries have been allocated. */
7092
7093 static bfd_boolean
7094 global_entry_stub (struct elf_link_hash_entry *h)
7095 {
7096 struct plt_entry *pent;
7097
7098 if (!h->pointer_equality_needed
7099 || h->def_regular)
7100 return FALSE;
7101
7102 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
7103 if (pent->plt.refcount > 0
7104 && pent->addend == 0)
7105 return TRUE;
7106
7107 return FALSE;
7108 }
7109
7110 /* Adjust a symbol defined by a dynamic object and referenced by a
7111 regular object. The current definition is in some section of the
7112 dynamic object, but we're not including those sections. We have to
7113 change the definition to something the rest of the link can
7114 understand. */
7115
7116 static bfd_boolean
7117 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
7118 struct elf_link_hash_entry *h)
7119 {
7120 struct ppc_link_hash_table *htab;
7121 asection *s, *srel;
7122
7123 htab = ppc_hash_table (info);
7124 if (htab == NULL)
7125 return FALSE;
7126
7127 /* Deal with function syms. */
7128 if (h->type == STT_FUNC
7129 || h->type == STT_GNU_IFUNC
7130 || h->needs_plt)
7131 {
7132 bfd_boolean local = (((struct ppc_link_hash_entry *) h)->save_res
7133 || SYMBOL_CALLS_LOCAL (info, h)
7134 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h));
7135 /* Discard dyn_relocs when non-pic if we've decided that a
7136 function symbol is local and not an ifunc. We keep dynamic
7137 relocs for ifuncs when local rather than always emitting a
7138 plt call stub for them and defining the symbol on the call
7139 stub. We can't do that for ELFv1 anyway (a function symbol
7140 is defined on a descriptor, not code) and it can be faster at
7141 run-time due to not needing to bounce through a stub. The
7142 dyn_relocs for ifuncs will be applied even in a static
7143 executable. */
7144 if (!bfd_link_pic (info)
7145 && h->type != STT_GNU_IFUNC
7146 && local)
7147 ((struct ppc_link_hash_entry *) h)->dyn_relocs = NULL;
7148
7149 /* Clear procedure linkage table information for any symbol that
7150 won't need a .plt entry. */
7151 struct plt_entry *ent;
7152 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
7153 if (ent->plt.refcount > 0)
7154 break;
7155 if (ent == NULL
7156 || (h->type != STT_GNU_IFUNC && local))
7157 {
7158 h->plt.plist = NULL;
7159 h->needs_plt = 0;
7160 h->pointer_equality_needed = 0;
7161 }
7162 else if (abiversion (info->output_bfd) >= 2)
7163 {
7164 /* Taking a function's address in a read/write section
7165 doesn't require us to define the function symbol in the
7166 executable on a global entry stub. A dynamic reloc can
7167 be used instead. The reason we prefer a few more dynamic
7168 relocs is that calling via a global entry stub costs a
7169 few more instructions, and pointer_equality_needed causes
7170 extra work in ld.so when resolving these symbols. */
7171 if (global_entry_stub (h))
7172 {
7173 if (!readonly_dynrelocs (h))
7174 {
7175 h->pointer_equality_needed = 0;
7176 /* If we haven't seen a branch reloc then we don't need
7177 a plt entry. */
7178 if (!h->needs_plt)
7179 h->plt.plist = NULL;
7180 }
7181 else if (!bfd_link_pic (info))
7182 /* We are going to be defining the function symbol on the
7183 plt stub, so no dyn_relocs needed when non-pic. */
7184 ((struct ppc_link_hash_entry *) h)->dyn_relocs = NULL;
7185 }
7186
7187 /* ELFv2 function symbols can't have copy relocs. */
7188 return TRUE;
7189 }
7190 else if (!h->needs_plt
7191 && !readonly_dynrelocs (h))
7192 {
7193 /* If we haven't seen a branch reloc then we don't need a
7194 plt entry. */
7195 h->plt.plist = NULL;
7196 h->pointer_equality_needed = 0;
7197 return TRUE;
7198 }
7199 }
7200 else
7201 h->plt.plist = NULL;
7202
7203 /* If this is a weak symbol, and there is a real definition, the
7204 processor independent code will have arranged for us to see the
7205 real definition first, and we can just use the same value. */
7206 if (h->is_weakalias)
7207 {
7208 struct elf_link_hash_entry *def = weakdef (h);
7209 BFD_ASSERT (def->root.type == bfd_link_hash_defined);
7210 h->root.u.def.section = def->root.u.def.section;
7211 h->root.u.def.value = def->root.u.def.value;
7212 if (def->root.u.def.section == htab->elf.sdynbss
7213 || def->root.u.def.section == htab->elf.sdynrelro)
7214 ((struct ppc_link_hash_entry *) h)->dyn_relocs = NULL;
7215 return TRUE;
7216 }
7217
7218 /* If we are creating a shared library, we must presume that the
7219 only references to the symbol are via the global offset table.
7220 For such cases we need not do anything here; the relocations will
7221 be handled correctly by relocate_section. */
7222 if (bfd_link_pic (info))
7223 return TRUE;
7224
7225 /* If there are no references to this symbol that do not use the
7226 GOT, we don't need to generate a copy reloc. */
7227 if (!h->non_got_ref)
7228 return TRUE;
7229
7230 /* Don't generate a copy reloc for symbols defined in the executable. */
7231 if (!h->def_dynamic || !h->ref_regular || h->def_regular
7232
7233 /* If -z nocopyreloc was given, don't generate them either. */
7234 || info->nocopyreloc
7235
7236 /* If we don't find any dynamic relocs in read-only sections, then
7237 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
7238 || (ELIMINATE_COPY_RELOCS && !alias_readonly_dynrelocs (h))
7239
7240 /* Protected variables do not work with .dynbss. The copy in
7241 .dynbss won't be used by the shared library with the protected
7242 definition for the variable. Text relocations are preferable
7243 to an incorrect program. */
7244 || h->protected_def)
7245 return TRUE;
7246
7247 if (h->plt.plist != NULL)
7248 {
7249 /* We should never get here, but unfortunately there are versions
7250 of gcc out there that improperly (for this ABI) put initialized
7251 function pointers, vtable refs and suchlike in read-only
7252 sections. Allow them to proceed, but warn that this might
7253 break at runtime. */
7254 info->callbacks->einfo
7255 (_("%P: copy reloc against `%T' requires lazy plt linking; "
7256 "avoid setting LD_BIND_NOW=1 or upgrade gcc\n"),
7257 h->root.root.string);
7258 }
7259
7260 /* This is a reference to a symbol defined by a dynamic object which
7261 is not a function. */
7262
7263 /* We must allocate the symbol in our .dynbss section, which will
7264 become part of the .bss section of the executable. There will be
7265 an entry for this symbol in the .dynsym section. The dynamic
7266 object will contain position independent code, so all references
7267 from the dynamic object to this symbol will go through the global
7268 offset table. The dynamic linker will use the .dynsym entry to
7269 determine the address it must put in the global offset table, so
7270 both the dynamic object and the regular object will refer to the
7271 same memory location for the variable. */
7272 if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
7273 {
7274 s = htab->elf.sdynrelro;
7275 srel = htab->elf.sreldynrelro;
7276 }
7277 else
7278 {
7279 s = htab->elf.sdynbss;
7280 srel = htab->elf.srelbss;
7281 }
7282 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
7283 {
7284 /* We must generate a R_PPC64_COPY reloc to tell the dynamic
7285 linker to copy the initial value out of the dynamic object
7286 and into the runtime process image. */
7287 srel->size += sizeof (Elf64_External_Rela);
7288 h->needs_copy = 1;
7289 }
7290
7291 /* We no longer want dyn_relocs. */
7292 ((struct ppc_link_hash_entry *) h)->dyn_relocs = NULL;
7293 return _bfd_elf_adjust_dynamic_copy (info, h, s);
7294 }
7295
7296 /* If given a function descriptor symbol, hide both the function code
7297 sym and the descriptor. */
7298 static void
7299 ppc64_elf_hide_symbol (struct bfd_link_info *info,
7300 struct elf_link_hash_entry *h,
7301 bfd_boolean force_local)
7302 {
7303 struct ppc_link_hash_entry *eh;
7304 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
7305
7306 eh = (struct ppc_link_hash_entry *) h;
7307 if (eh->is_func_descriptor)
7308 {
7309 struct ppc_link_hash_entry *fh = eh->oh;
7310
7311 if (fh == NULL)
7312 {
7313 const char *p, *q;
7314 struct elf_link_hash_table *htab = elf_hash_table (info);
7315 char save;
7316
7317 /* We aren't supposed to use alloca in BFD because on
7318 systems which do not have alloca the version in libiberty
7319 calls xmalloc, which might cause the program to crash
7320 when it runs out of memory. This function doesn't have a
7321 return status, so there's no way to gracefully return an
7322 error. So cheat. We know that string[-1] can be safely
7323 accessed; It's either a string in an ELF string table,
7324 or allocated in an objalloc structure. */
7325
7326 p = eh->elf.root.root.string - 1;
7327 save = *p;
7328 *(char *) p = '.';
7329 fh = (struct ppc_link_hash_entry *)
7330 elf_link_hash_lookup (htab, p, FALSE, FALSE, FALSE);
7331 *(char *) p = save;
7332
7333 /* Unfortunately, if it so happens that the string we were
7334 looking for was allocated immediately before this string,
7335 then we overwrote the string terminator. That's the only
7336 reason the lookup should fail. */
7337 if (fh == NULL)
7338 {
7339 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
7340 while (q >= eh->elf.root.root.string && *q == *p)
7341 --q, --p;
7342 if (q < eh->elf.root.root.string && *p == '.')
7343 fh = (struct ppc_link_hash_entry *)
7344 elf_link_hash_lookup (htab, p, FALSE, FALSE, FALSE);
7345 }
7346 if (fh != NULL)
7347 {
7348 eh->oh = fh;
7349 fh->oh = eh;
7350 }
7351 }
7352 if (fh != NULL)
7353 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
7354 }
7355 }
7356
7357 static bfd_boolean
7358 get_sym_h (struct elf_link_hash_entry **hp,
7359 Elf_Internal_Sym **symp,
7360 asection **symsecp,
7361 unsigned char **tls_maskp,
7362 Elf_Internal_Sym **locsymsp,
7363 unsigned long r_symndx,
7364 bfd *ibfd)
7365 {
7366 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
7367
7368 if (r_symndx >= symtab_hdr->sh_info)
7369 {
7370 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
7371 struct elf_link_hash_entry *h;
7372
7373 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
7374 h = elf_follow_link (h);
7375
7376 if (hp != NULL)
7377 *hp = h;
7378
7379 if (symp != NULL)
7380 *symp = NULL;
7381
7382 if (symsecp != NULL)
7383 {
7384 asection *symsec = NULL;
7385 if (h->root.type == bfd_link_hash_defined
7386 || h->root.type == bfd_link_hash_defweak)
7387 symsec = h->root.u.def.section;
7388 *symsecp = symsec;
7389 }
7390
7391 if (tls_maskp != NULL)
7392 {
7393 struct ppc_link_hash_entry *eh;
7394
7395 eh = (struct ppc_link_hash_entry *) h;
7396 *tls_maskp = &eh->tls_mask;
7397 }
7398 }
7399 else
7400 {
7401 Elf_Internal_Sym *sym;
7402 Elf_Internal_Sym *locsyms = *locsymsp;
7403
7404 if (locsyms == NULL)
7405 {
7406 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
7407 if (locsyms == NULL)
7408 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
7409 symtab_hdr->sh_info,
7410 0, NULL, NULL, NULL);
7411 if (locsyms == NULL)
7412 return FALSE;
7413 *locsymsp = locsyms;
7414 }
7415 sym = locsyms + r_symndx;
7416
7417 if (hp != NULL)
7418 *hp = NULL;
7419
7420 if (symp != NULL)
7421 *symp = sym;
7422
7423 if (symsecp != NULL)
7424 *symsecp = bfd_section_from_elf_index (ibfd, sym->st_shndx);
7425
7426 if (tls_maskp != NULL)
7427 {
7428 struct got_entry **lgot_ents;
7429 unsigned char *tls_mask;
7430
7431 tls_mask = NULL;
7432 lgot_ents = elf_local_got_ents (ibfd);
7433 if (lgot_ents != NULL)
7434 {
7435 struct plt_entry **local_plt = (struct plt_entry **)
7436 (lgot_ents + symtab_hdr->sh_info);
7437 unsigned char *lgot_masks = (unsigned char *)
7438 (local_plt + symtab_hdr->sh_info);
7439 tls_mask = &lgot_masks[r_symndx];
7440 }
7441 *tls_maskp = tls_mask;
7442 }
7443 }
7444 return TRUE;
7445 }
7446
7447 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
7448 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
7449 type suitable for optimization, and 1 otherwise. */
7450
7451 static int
7452 get_tls_mask (unsigned char **tls_maskp,
7453 unsigned long *toc_symndx,
7454 bfd_vma *toc_addend,
7455 Elf_Internal_Sym **locsymsp,
7456 const Elf_Internal_Rela *rel,
7457 bfd *ibfd)
7458 {
7459 unsigned long r_symndx;
7460 int next_r;
7461 struct elf_link_hash_entry *h;
7462 Elf_Internal_Sym *sym;
7463 asection *sec;
7464 bfd_vma off;
7465
7466 r_symndx = ELF64_R_SYM (rel->r_info);
7467 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
7468 return 0;
7469
7470 if ((*tls_maskp != NULL && **tls_maskp != 0)
7471 || sec == NULL
7472 || ppc64_elf_section_data (sec) == NULL
7473 || ppc64_elf_section_data (sec)->sec_type != sec_toc)
7474 return 1;
7475
7476 /* Look inside a TOC section too. */
7477 if (h != NULL)
7478 {
7479 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
7480 off = h->root.u.def.value;
7481 }
7482 else
7483 off = sym->st_value;
7484 off += rel->r_addend;
7485 BFD_ASSERT (off % 8 == 0);
7486 r_symndx = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8];
7487 next_r = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8 + 1];
7488 if (toc_symndx != NULL)
7489 *toc_symndx = r_symndx;
7490 if (toc_addend != NULL)
7491 *toc_addend = ppc64_elf_section_data (sec)->u.toc.add[off / 8];
7492 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
7493 return 0;
7494 if ((h == NULL || is_static_defined (h))
7495 && (next_r == -1 || next_r == -2))
7496 return 1 - next_r;
7497 return 1;
7498 }
7499
7500 /* Find (or create) an entry in the tocsave hash table. */
7501
7502 static struct tocsave_entry *
7503 tocsave_find (struct ppc_link_hash_table *htab,
7504 enum insert_option insert,
7505 Elf_Internal_Sym **local_syms,
7506 const Elf_Internal_Rela *irela,
7507 bfd *ibfd)
7508 {
7509 unsigned long r_indx;
7510 struct elf_link_hash_entry *h;
7511 Elf_Internal_Sym *sym;
7512 struct tocsave_entry ent, *p;
7513 hashval_t hash;
7514 struct tocsave_entry **slot;
7515
7516 r_indx = ELF64_R_SYM (irela->r_info);
7517 if (!get_sym_h (&h, &sym, &ent.sec, NULL, local_syms, r_indx, ibfd))
7518 return NULL;
7519 if (ent.sec == NULL || ent.sec->output_section == NULL)
7520 {
7521 _bfd_error_handler
7522 (_("%B: undefined symbol on R_PPC64_TOCSAVE relocation"), ibfd);
7523 return NULL;
7524 }
7525
7526 if (h != NULL)
7527 ent.offset = h->root.u.def.value;
7528 else
7529 ent.offset = sym->st_value;
7530 ent.offset += irela->r_addend;
7531
7532 hash = tocsave_htab_hash (&ent);
7533 slot = ((struct tocsave_entry **)
7534 htab_find_slot_with_hash (htab->tocsave_htab, &ent, hash, insert));
7535 if (slot == NULL)
7536 return NULL;
7537
7538 if (*slot == NULL)
7539 {
7540 p = (struct tocsave_entry *) bfd_alloc (ibfd, sizeof (*p));
7541 if (p == NULL)
7542 return NULL;
7543 *p = ent;
7544 *slot = p;
7545 }
7546 return *slot;
7547 }
7548
7549 /* Adjust all global syms defined in opd sections. In gcc generated
7550 code for the old ABI, these will already have been done. */
7551
7552 static bfd_boolean
7553 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
7554 {
7555 struct ppc_link_hash_entry *eh;
7556 asection *sym_sec;
7557 struct _opd_sec_data *opd;
7558
7559 if (h->root.type == bfd_link_hash_indirect)
7560 return TRUE;
7561
7562 if (h->root.type != bfd_link_hash_defined
7563 && h->root.type != bfd_link_hash_defweak)
7564 return TRUE;
7565
7566 eh = (struct ppc_link_hash_entry *) h;
7567 if (eh->adjust_done)
7568 return TRUE;
7569
7570 sym_sec = eh->elf.root.u.def.section;
7571 opd = get_opd_info (sym_sec);
7572 if (opd != NULL && opd->adjust != NULL)
7573 {
7574 long adjust = opd->adjust[OPD_NDX (eh->elf.root.u.def.value)];
7575 if (adjust == -1)
7576 {
7577 /* This entry has been deleted. */
7578 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
7579 if (dsec == NULL)
7580 {
7581 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
7582 if (discarded_section (dsec))
7583 {
7584 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
7585 break;
7586 }
7587 }
7588 eh->elf.root.u.def.value = 0;
7589 eh->elf.root.u.def.section = dsec;
7590 }
7591 else
7592 eh->elf.root.u.def.value += adjust;
7593 eh->adjust_done = 1;
7594 }
7595 return TRUE;
7596 }
7597
7598 /* Handles decrementing dynamic reloc counts for the reloc specified by
7599 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM
7600 have already been determined. */
7601
7602 static bfd_boolean
7603 dec_dynrel_count (bfd_vma r_info,
7604 asection *sec,
7605 struct bfd_link_info *info,
7606 Elf_Internal_Sym **local_syms,
7607 struct elf_link_hash_entry *h,
7608 Elf_Internal_Sym *sym)
7609 {
7610 enum elf_ppc64_reloc_type r_type;
7611 asection *sym_sec = NULL;
7612
7613 /* Can this reloc be dynamic? This switch, and later tests here
7614 should be kept in sync with the code in check_relocs. */
7615 r_type = ELF64_R_TYPE (r_info);
7616 switch (r_type)
7617 {
7618 default:
7619 return TRUE;
7620
7621 case R_PPC64_TPREL16:
7622 case R_PPC64_TPREL16_LO:
7623 case R_PPC64_TPREL16_HI:
7624 case R_PPC64_TPREL16_HA:
7625 case R_PPC64_TPREL16_DS:
7626 case R_PPC64_TPREL16_LO_DS:
7627 case R_PPC64_TPREL16_HIGH:
7628 case R_PPC64_TPREL16_HIGHA:
7629 case R_PPC64_TPREL16_HIGHER:
7630 case R_PPC64_TPREL16_HIGHERA:
7631 case R_PPC64_TPREL16_HIGHEST:
7632 case R_PPC64_TPREL16_HIGHESTA:
7633 case R_PPC64_TPREL64:
7634 case R_PPC64_DTPMOD64:
7635 case R_PPC64_DTPREL64:
7636 case R_PPC64_ADDR64:
7637 case R_PPC64_REL30:
7638 case R_PPC64_REL32:
7639 case R_PPC64_REL64:
7640 case R_PPC64_ADDR14:
7641 case R_PPC64_ADDR14_BRNTAKEN:
7642 case R_PPC64_ADDR14_BRTAKEN:
7643 case R_PPC64_ADDR16:
7644 case R_PPC64_ADDR16_DS:
7645 case R_PPC64_ADDR16_HA:
7646 case R_PPC64_ADDR16_HI:
7647 case R_PPC64_ADDR16_HIGH:
7648 case R_PPC64_ADDR16_HIGHA:
7649 case R_PPC64_ADDR16_HIGHER:
7650 case R_PPC64_ADDR16_HIGHERA:
7651 case R_PPC64_ADDR16_HIGHEST:
7652 case R_PPC64_ADDR16_HIGHESTA:
7653 case R_PPC64_ADDR16_LO:
7654 case R_PPC64_ADDR16_LO_DS:
7655 case R_PPC64_ADDR24:
7656 case R_PPC64_ADDR32:
7657 case R_PPC64_UADDR16:
7658 case R_PPC64_UADDR32:
7659 case R_PPC64_UADDR64:
7660 case R_PPC64_TOC:
7661 break;
7662 }
7663
7664 if (local_syms != NULL)
7665 {
7666 unsigned long r_symndx;
7667 bfd *ibfd = sec->owner;
7668
7669 r_symndx = ELF64_R_SYM (r_info);
7670 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
7671 return FALSE;
7672 }
7673
7674 if ((bfd_link_pic (info)
7675 && (must_be_dyn_reloc (info, r_type)
7676 || (h != NULL
7677 && (!SYMBOLIC_BIND (info, h)
7678 || h->root.type == bfd_link_hash_defweak
7679 || !h->def_regular))))
7680 || (ELIMINATE_COPY_RELOCS
7681 && !bfd_link_pic (info)
7682 && h != NULL
7683 && (h->root.type == bfd_link_hash_defweak
7684 || !h->def_regular)))
7685 ;
7686 else
7687 return TRUE;
7688
7689 if (h != NULL)
7690 {
7691 struct elf_dyn_relocs *p;
7692 struct elf_dyn_relocs **pp;
7693 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
7694
7695 /* elf_gc_sweep may have already removed all dyn relocs associated
7696 with local syms for a given section. Also, symbol flags are
7697 changed by elf_gc_sweep_symbol, confusing the test above. Don't
7698 report a dynreloc miscount. */
7699 if (*pp == NULL && info->gc_sections)
7700 return TRUE;
7701
7702 while ((p = *pp) != NULL)
7703 {
7704 if (p->sec == sec)
7705 {
7706 if (!must_be_dyn_reloc (info, r_type))
7707 p->pc_count -= 1;
7708 p->count -= 1;
7709 if (p->count == 0)
7710 *pp = p->next;
7711 return TRUE;
7712 }
7713 pp = &p->next;
7714 }
7715 }
7716 else
7717 {
7718 struct ppc_dyn_relocs *p;
7719 struct ppc_dyn_relocs **pp;
7720 void *vpp;
7721 bfd_boolean is_ifunc;
7722
7723 if (local_syms == NULL)
7724 sym_sec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
7725 if (sym_sec == NULL)
7726 sym_sec = sec;
7727
7728 vpp = &elf_section_data (sym_sec)->local_dynrel;
7729 pp = (struct ppc_dyn_relocs **) vpp;
7730
7731 if (*pp == NULL && info->gc_sections)
7732 return TRUE;
7733
7734 is_ifunc = ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC;
7735 while ((p = *pp) != NULL)
7736 {
7737 if (p->sec == sec && p->ifunc == is_ifunc)
7738 {
7739 p->count -= 1;
7740 if (p->count == 0)
7741 *pp = p->next;
7742 return TRUE;
7743 }
7744 pp = &p->next;
7745 }
7746 }
7747
7748 /* xgettext:c-format */
7749 info->callbacks->einfo (_("%P: dynreloc miscount for %B, section %A\n"),
7750 sec->owner, sec);
7751 bfd_set_error (bfd_error_bad_value);
7752 return FALSE;
7753 }
7754
7755 /* Remove unused Official Procedure Descriptor entries. Currently we
7756 only remove those associated with functions in discarded link-once
7757 sections, or weakly defined functions that have been overridden. It
7758 would be possible to remove many more entries for statically linked
7759 applications. */
7760
7761 bfd_boolean
7762 ppc64_elf_edit_opd (struct bfd_link_info *info)
7763 {
7764 bfd *ibfd;
7765 bfd_boolean some_edited = FALSE;
7766 asection *need_pad = NULL;
7767 struct ppc_link_hash_table *htab;
7768
7769 htab = ppc_hash_table (info);
7770 if (htab == NULL)
7771 return FALSE;
7772
7773 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
7774 {
7775 asection *sec;
7776 Elf_Internal_Rela *relstart, *rel, *relend;
7777 Elf_Internal_Shdr *symtab_hdr;
7778 Elf_Internal_Sym *local_syms;
7779 struct _opd_sec_data *opd;
7780 bfd_boolean need_edit, add_aux_fields, broken;
7781 bfd_size_type cnt_16b = 0;
7782
7783 if (!is_ppc64_elf (ibfd))
7784 continue;
7785
7786 sec = bfd_get_section_by_name (ibfd, ".opd");
7787 if (sec == NULL || sec->size == 0)
7788 continue;
7789
7790 if (sec->sec_info_type == SEC_INFO_TYPE_JUST_SYMS)
7791 continue;
7792
7793 if (sec->output_section == bfd_abs_section_ptr)
7794 continue;
7795
7796 /* Look through the section relocs. */
7797 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
7798 continue;
7799
7800 local_syms = NULL;
7801 symtab_hdr = &elf_symtab_hdr (ibfd);
7802
7803 /* Read the relocations. */
7804 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7805 info->keep_memory);
7806 if (relstart == NULL)
7807 return FALSE;
7808
7809 /* First run through the relocs to check they are sane, and to
7810 determine whether we need to edit this opd section. */
7811 need_edit = FALSE;
7812 broken = FALSE;
7813 need_pad = sec;
7814 relend = relstart + sec->reloc_count;
7815 for (rel = relstart; rel < relend; )
7816 {
7817 enum elf_ppc64_reloc_type r_type;
7818 unsigned long r_symndx;
7819 asection *sym_sec;
7820 struct elf_link_hash_entry *h;
7821 Elf_Internal_Sym *sym;
7822 bfd_vma offset;
7823
7824 /* .opd contains an array of 16 or 24 byte entries. We're
7825 only interested in the reloc pointing to a function entry
7826 point. */
7827 offset = rel->r_offset;
7828 if (rel + 1 == relend
7829 || rel[1].r_offset != offset + 8)
7830 {
7831 /* If someone messes with .opd alignment then after a
7832 "ld -r" we might have padding in the middle of .opd.
7833 Also, there's nothing to prevent someone putting
7834 something silly in .opd with the assembler. No .opd
7835 optimization for them! */
7836 broken_opd:
7837 _bfd_error_handler
7838 (_("%B: .opd is not a regular array of opd entries"), ibfd);
7839 broken = TRUE;
7840 break;
7841 }
7842
7843 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
7844 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
7845 {
7846 _bfd_error_handler
7847 /* xgettext:c-format */
7848 (_("%B: unexpected reloc type %u in .opd section"),
7849 ibfd, r_type);
7850 broken = TRUE;
7851 break;
7852 }
7853
7854 r_symndx = ELF64_R_SYM (rel->r_info);
7855 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7856 r_symndx, ibfd))
7857 goto error_ret;
7858
7859 if (sym_sec == NULL || sym_sec->owner == NULL)
7860 {
7861 const char *sym_name;
7862 if (h != NULL)
7863 sym_name = h->root.root.string;
7864 else
7865 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
7866 sym_sec);
7867
7868 _bfd_error_handler
7869 /* xgettext:c-format */
7870 (_("%B: undefined sym `%s' in .opd section"),
7871 ibfd, sym_name);
7872 broken = TRUE;
7873 break;
7874 }
7875
7876 /* opd entries are always for functions defined in the
7877 current input bfd. If the symbol isn't defined in the
7878 input bfd, then we won't be using the function in this
7879 bfd; It must be defined in a linkonce section in another
7880 bfd, or is weak. It's also possible that we are
7881 discarding the function due to a linker script /DISCARD/,
7882 which we test for via the output_section. */
7883 if (sym_sec->owner != ibfd
7884 || sym_sec->output_section == bfd_abs_section_ptr)
7885 need_edit = TRUE;
7886
7887 rel += 2;
7888 if (rel + 1 == relend
7889 || (rel + 2 < relend
7890 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC))
7891 ++rel;
7892
7893 if (rel == relend)
7894 {
7895 if (sec->size == offset + 24)
7896 {
7897 need_pad = NULL;
7898 break;
7899 }
7900 if (sec->size == offset + 16)
7901 {
7902 cnt_16b++;
7903 break;
7904 }
7905 goto broken_opd;
7906 }
7907 else if (rel + 1 < relend
7908 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
7909 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
7910 {
7911 if (rel[0].r_offset == offset + 16)
7912 cnt_16b++;
7913 else if (rel[0].r_offset != offset + 24)
7914 goto broken_opd;
7915 }
7916 else
7917 goto broken_opd;
7918 }
7919
7920 add_aux_fields = htab->params->non_overlapping_opd && cnt_16b > 0;
7921
7922 if (!broken && (need_edit || add_aux_fields))
7923 {
7924 Elf_Internal_Rela *write_rel;
7925 Elf_Internal_Shdr *rel_hdr;
7926 bfd_byte *rptr, *wptr;
7927 bfd_byte *new_contents;
7928 bfd_size_type amt;
7929
7930 new_contents = NULL;
7931 amt = OPD_NDX (sec->size) * sizeof (long);
7932 opd = &ppc64_elf_section_data (sec)->u.opd;
7933 opd->adjust = bfd_zalloc (sec->owner, amt);
7934 if (opd->adjust == NULL)
7935 return FALSE;
7936
7937 /* This seems a waste of time as input .opd sections are all
7938 zeros as generated by gcc, but I suppose there's no reason
7939 this will always be so. We might start putting something in
7940 the third word of .opd entries. */
7941 if ((sec->flags & SEC_IN_MEMORY) == 0)
7942 {
7943 bfd_byte *loc;
7944 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
7945 {
7946 if (loc != NULL)
7947 free (loc);
7948 error_ret:
7949 if (local_syms != NULL
7950 && symtab_hdr->contents != (unsigned char *) local_syms)
7951 free (local_syms);
7952 if (elf_section_data (sec)->relocs != relstart)
7953 free (relstart);
7954 return FALSE;
7955 }
7956 sec->contents = loc;
7957 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
7958 }
7959
7960 elf_section_data (sec)->relocs = relstart;
7961
7962 new_contents = sec->contents;
7963 if (add_aux_fields)
7964 {
7965 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
7966 if (new_contents == NULL)
7967 return FALSE;
7968 need_pad = NULL;
7969 }
7970 wptr = new_contents;
7971 rptr = sec->contents;
7972 write_rel = relstart;
7973 for (rel = relstart; rel < relend; )
7974 {
7975 unsigned long r_symndx;
7976 asection *sym_sec;
7977 struct elf_link_hash_entry *h;
7978 struct ppc_link_hash_entry *fdh = NULL;
7979 Elf_Internal_Sym *sym;
7980 long opd_ent_size;
7981 Elf_Internal_Rela *next_rel;
7982 bfd_boolean skip;
7983
7984 r_symndx = ELF64_R_SYM (rel->r_info);
7985 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7986 r_symndx, ibfd))
7987 goto error_ret;
7988
7989 next_rel = rel + 2;
7990 if (next_rel + 1 == relend
7991 || (next_rel + 2 < relend
7992 && ELF64_R_TYPE (next_rel[2].r_info) == R_PPC64_TOC))
7993 ++next_rel;
7994
7995 /* See if the .opd entry is full 24 byte or
7996 16 byte (with fd_aux entry overlapped with next
7997 fd_func). */
7998 opd_ent_size = 24;
7999 if (next_rel == relend)
8000 {
8001 if (sec->size == rel->r_offset + 16)
8002 opd_ent_size = 16;
8003 }
8004 else if (next_rel->r_offset == rel->r_offset + 16)
8005 opd_ent_size = 16;
8006
8007 if (h != NULL
8008 && h->root.root.string[0] == '.')
8009 {
8010 fdh = ((struct ppc_link_hash_entry *) h)->oh;
8011 if (fdh != NULL)
8012 {
8013 fdh = ppc_follow_link (fdh);
8014 if (fdh->elf.root.type != bfd_link_hash_defined
8015 && fdh->elf.root.type != bfd_link_hash_defweak)
8016 fdh = NULL;
8017 }
8018 }
8019
8020 skip = (sym_sec->owner != ibfd
8021 || sym_sec->output_section == bfd_abs_section_ptr);
8022 if (skip)
8023 {
8024 if (fdh != NULL && sym_sec->owner == ibfd)
8025 {
8026 /* Arrange for the function descriptor sym
8027 to be dropped. */
8028 fdh->elf.root.u.def.value = 0;
8029 fdh->elf.root.u.def.section = sym_sec;
8030 }
8031 opd->adjust[OPD_NDX (rel->r_offset)] = -1;
8032
8033 if (NO_OPD_RELOCS || bfd_link_relocatable (info))
8034 rel = next_rel;
8035 else
8036 while (1)
8037 {
8038 if (!dec_dynrel_count (rel->r_info, sec, info,
8039 NULL, h, sym))
8040 goto error_ret;
8041
8042 if (++rel == next_rel)
8043 break;
8044
8045 r_symndx = ELF64_R_SYM (rel->r_info);
8046 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8047 r_symndx, ibfd))
8048 goto error_ret;
8049 }
8050 }
8051 else
8052 {
8053 /* We'll be keeping this opd entry. */
8054 long adjust;
8055
8056 if (fdh != NULL)
8057 {
8058 /* Redefine the function descriptor symbol to
8059 this location in the opd section. It is
8060 necessary to update the value here rather
8061 than using an array of adjustments as we do
8062 for local symbols, because various places
8063 in the generic ELF code use the value
8064 stored in u.def.value. */
8065 fdh->elf.root.u.def.value = wptr - new_contents;
8066 fdh->adjust_done = 1;
8067 }
8068
8069 /* Local syms are a bit tricky. We could
8070 tweak them as they can be cached, but
8071 we'd need to look through the local syms
8072 for the function descriptor sym which we
8073 don't have at the moment. So keep an
8074 array of adjustments. */
8075 adjust = (wptr - new_contents) - (rptr - sec->contents);
8076 opd->adjust[OPD_NDX (rel->r_offset)] = adjust;
8077
8078 if (wptr != rptr)
8079 memcpy (wptr, rptr, opd_ent_size);
8080 wptr += opd_ent_size;
8081 if (add_aux_fields && opd_ent_size == 16)
8082 {
8083 memset (wptr, '\0', 8);
8084 wptr += 8;
8085 }
8086
8087 /* We need to adjust any reloc offsets to point to the
8088 new opd entries. */
8089 for ( ; rel != next_rel; ++rel)
8090 {
8091 rel->r_offset += adjust;
8092 if (write_rel != rel)
8093 memcpy (write_rel, rel, sizeof (*rel));
8094 ++write_rel;
8095 }
8096 }
8097
8098 rptr += opd_ent_size;
8099 }
8100
8101 sec->size = wptr - new_contents;
8102 sec->reloc_count = write_rel - relstart;
8103 if (add_aux_fields)
8104 {
8105 free (sec->contents);
8106 sec->contents = new_contents;
8107 }
8108
8109 /* Fudge the header size too, as this is used later in
8110 elf_bfd_final_link if we are emitting relocs. */
8111 rel_hdr = _bfd_elf_single_rel_hdr (sec);
8112 rel_hdr->sh_size = sec->reloc_count * rel_hdr->sh_entsize;
8113 some_edited = TRUE;
8114 }
8115 else if (elf_section_data (sec)->relocs != relstart)
8116 free (relstart);
8117
8118 if (local_syms != NULL
8119 && symtab_hdr->contents != (unsigned char *) local_syms)
8120 {
8121 if (!info->keep_memory)
8122 free (local_syms);
8123 else
8124 symtab_hdr->contents = (unsigned char *) local_syms;
8125 }
8126 }
8127
8128 if (some_edited)
8129 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
8130
8131 /* If we are doing a final link and the last .opd entry is just 16 byte
8132 long, add a 8 byte padding after it. */
8133 if (need_pad != NULL && !bfd_link_relocatable (info))
8134 {
8135 bfd_byte *p;
8136
8137 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
8138 {
8139 BFD_ASSERT (need_pad->size > 0);
8140
8141 p = bfd_malloc (need_pad->size + 8);
8142 if (p == NULL)
8143 return FALSE;
8144
8145 if (! bfd_get_section_contents (need_pad->owner, need_pad,
8146 p, 0, need_pad->size))
8147 return FALSE;
8148
8149 need_pad->contents = p;
8150 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
8151 }
8152 else
8153 {
8154 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
8155 if (p == NULL)
8156 return FALSE;
8157
8158 need_pad->contents = p;
8159 }
8160
8161 memset (need_pad->contents + need_pad->size, 0, 8);
8162 need_pad->size += 8;
8163 }
8164
8165 return TRUE;
8166 }
8167
8168 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
8169
8170 asection *
8171 ppc64_elf_tls_setup (struct bfd_link_info *info)
8172 {
8173 struct ppc_link_hash_table *htab;
8174
8175 htab = ppc_hash_table (info);
8176 if (htab == NULL)
8177 return NULL;
8178
8179 if (abiversion (info->output_bfd) == 1)
8180 htab->opd_abi = 1;
8181
8182 if (htab->params->no_multi_toc)
8183 htab->do_multi_toc = 0;
8184 else if (!htab->do_multi_toc)
8185 htab->params->no_multi_toc = 1;
8186
8187 /* Default to --no-plt-localentry, as this option can cause problems
8188 with symbol interposition. For example, glibc libpthread.so and
8189 libc.so duplicate many pthread symbols, with a fallback
8190 implementation in libc.so. In some cases the fallback does more
8191 work than the pthread implementation. __pthread_condattr_destroy
8192 is one such symbol: the libpthread.so implementation is
8193 localentry:0 while the libc.so implementation is localentry:8.
8194 An app that "cleverly" uses dlopen to only load necessary
8195 libraries at runtime may omit loading libpthread.so when not
8196 running multi-threaded, which then results in the libc.so
8197 fallback symbols being used and ld.so complaining. Now there
8198 are workarounds in ld (see non_zero_localentry) to detect the
8199 pthread situation, but that may not be the only case where
8200 --plt-localentry can cause trouble. */
8201 if (htab->params->plt_localentry0 < 0)
8202 htab->params->plt_localentry0 = 0;
8203 if (htab->params->plt_localentry0
8204 && elf_link_hash_lookup (&htab->elf, "GLIBC_2.26",
8205 FALSE, FALSE, FALSE) == NULL)
8206 info->callbacks->einfo
8207 (_("%P: warning: --plt-localentry is especially dangerous without "
8208 "ld.so support to detect ABI violations.\n"));
8209
8210 htab->tls_get_addr = ((struct ppc_link_hash_entry *)
8211 elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
8212 FALSE, FALSE, TRUE));
8213 /* Move dynamic linking info to the function descriptor sym. */
8214 if (htab->tls_get_addr != NULL)
8215 func_desc_adjust (&htab->tls_get_addr->elf, info);
8216 htab->tls_get_addr_fd = ((struct ppc_link_hash_entry *)
8217 elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
8218 FALSE, FALSE, TRUE));
8219 if (htab->params->tls_get_addr_opt)
8220 {
8221 struct elf_link_hash_entry *opt, *opt_fd, *tga, *tga_fd;
8222
8223 opt = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr_opt",
8224 FALSE, FALSE, TRUE);
8225 if (opt != NULL)
8226 func_desc_adjust (opt, info);
8227 opt_fd = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
8228 FALSE, FALSE, TRUE);
8229 if (opt_fd != NULL
8230 && (opt_fd->root.type == bfd_link_hash_defined
8231 || opt_fd->root.type == bfd_link_hash_defweak))
8232 {
8233 /* If glibc supports an optimized __tls_get_addr call stub,
8234 signalled by the presence of __tls_get_addr_opt, and we'll
8235 be calling __tls_get_addr via a plt call stub, then
8236 make __tls_get_addr point to __tls_get_addr_opt. */
8237 tga_fd = &htab->tls_get_addr_fd->elf;
8238 if (htab->elf.dynamic_sections_created
8239 && tga_fd != NULL
8240 && (tga_fd->type == STT_FUNC
8241 || tga_fd->needs_plt)
8242 && !(SYMBOL_CALLS_LOCAL (info, tga_fd)
8243 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, tga_fd)))
8244 {
8245 struct plt_entry *ent;
8246
8247 for (ent = tga_fd->plt.plist; ent != NULL; ent = ent->next)
8248 if (ent->plt.refcount > 0)
8249 break;
8250 if (ent != NULL)
8251 {
8252 tga_fd->root.type = bfd_link_hash_indirect;
8253 tga_fd->root.u.i.link = &opt_fd->root;
8254 ppc64_elf_copy_indirect_symbol (info, opt_fd, tga_fd);
8255 opt_fd->mark = 1;
8256 if (opt_fd->dynindx != -1)
8257 {
8258 /* Use __tls_get_addr_opt in dynamic relocations. */
8259 opt_fd->dynindx = -1;
8260 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
8261 opt_fd->dynstr_index);
8262 if (!bfd_elf_link_record_dynamic_symbol (info, opt_fd))
8263 return NULL;
8264 }
8265 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) opt_fd;
8266 tga = &htab->tls_get_addr->elf;
8267 if (opt != NULL && tga != NULL)
8268 {
8269 tga->root.type = bfd_link_hash_indirect;
8270 tga->root.u.i.link = &opt->root;
8271 ppc64_elf_copy_indirect_symbol (info, opt, tga);
8272 opt->mark = 1;
8273 _bfd_elf_link_hash_hide_symbol (info, opt,
8274 tga->forced_local);
8275 htab->tls_get_addr = (struct ppc_link_hash_entry *) opt;
8276 }
8277 htab->tls_get_addr_fd->oh = htab->tls_get_addr;
8278 htab->tls_get_addr_fd->is_func_descriptor = 1;
8279 if (htab->tls_get_addr != NULL)
8280 {
8281 htab->tls_get_addr->oh = htab->tls_get_addr_fd;
8282 htab->tls_get_addr->is_func = 1;
8283 }
8284 }
8285 }
8286 }
8287 else if (htab->params->tls_get_addr_opt < 0)
8288 htab->params->tls_get_addr_opt = 0;
8289 }
8290 return _bfd_elf_tls_setup (info->output_bfd, info);
8291 }
8292
8293 /* Return TRUE iff REL is a branch reloc with a global symbol matching
8294 HASH1 or HASH2. */
8295
8296 static bfd_boolean
8297 branch_reloc_hash_match (const bfd *ibfd,
8298 const Elf_Internal_Rela *rel,
8299 const struct ppc_link_hash_entry *hash1,
8300 const struct ppc_link_hash_entry *hash2)
8301 {
8302 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
8303 enum elf_ppc64_reloc_type r_type = ELF64_R_TYPE (rel->r_info);
8304 unsigned int r_symndx = ELF64_R_SYM (rel->r_info);
8305
8306 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
8307 {
8308 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
8309 struct elf_link_hash_entry *h;
8310
8311 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
8312 h = elf_follow_link (h);
8313 if (h == &hash1->elf || h == &hash2->elf)
8314 return TRUE;
8315 }
8316 return FALSE;
8317 }
8318
8319 /* Run through all the TLS relocs looking for optimization
8320 opportunities. The linker has been hacked (see ppc64elf.em) to do
8321 a preliminary section layout so that we know the TLS segment
8322 offsets. We can't optimize earlier because some optimizations need
8323 to know the tp offset, and we need to optimize before allocating
8324 dynamic relocations. */
8325
8326 bfd_boolean
8327 ppc64_elf_tls_optimize (struct bfd_link_info *info)
8328 {
8329 bfd *ibfd;
8330 asection *sec;
8331 struct ppc_link_hash_table *htab;
8332 unsigned char *toc_ref;
8333 int pass;
8334
8335 if (!bfd_link_executable (info))
8336 return TRUE;
8337
8338 htab = ppc_hash_table (info);
8339 if (htab == NULL)
8340 return FALSE;
8341
8342 /* Make two passes over the relocs. On the first pass, mark toc
8343 entries involved with tls relocs, and check that tls relocs
8344 involved in setting up a tls_get_addr call are indeed followed by
8345 such a call. If they are not, we can't do any tls optimization.
8346 On the second pass twiddle tls_mask flags to notify
8347 relocate_section that optimization can be done, and adjust got
8348 and plt refcounts. */
8349 toc_ref = NULL;
8350 for (pass = 0; pass < 2; ++pass)
8351 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
8352 {
8353 Elf_Internal_Sym *locsyms = NULL;
8354 asection *toc = bfd_get_section_by_name (ibfd, ".toc");
8355
8356 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8357 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
8358 {
8359 Elf_Internal_Rela *relstart, *rel, *relend;
8360 bfd_boolean found_tls_get_addr_arg = 0;
8361
8362 /* Read the relocations. */
8363 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8364 info->keep_memory);
8365 if (relstart == NULL)
8366 {
8367 free (toc_ref);
8368 return FALSE;
8369 }
8370
8371 relend = relstart + sec->reloc_count;
8372 for (rel = relstart; rel < relend; rel++)
8373 {
8374 enum elf_ppc64_reloc_type r_type;
8375 unsigned long r_symndx;
8376 struct elf_link_hash_entry *h;
8377 Elf_Internal_Sym *sym;
8378 asection *sym_sec;
8379 unsigned char *tls_mask;
8380 unsigned char tls_set, tls_clear, tls_type = 0;
8381 bfd_vma value;
8382 bfd_boolean ok_tprel, is_local;
8383 long toc_ref_index = 0;
8384 int expecting_tls_get_addr = 0;
8385 bfd_boolean ret = FALSE;
8386
8387 r_symndx = ELF64_R_SYM (rel->r_info);
8388 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
8389 r_symndx, ibfd))
8390 {
8391 err_free_rel:
8392 if (elf_section_data (sec)->relocs != relstart)
8393 free (relstart);
8394 if (toc_ref != NULL)
8395 free (toc_ref);
8396 if (locsyms != NULL
8397 && (elf_symtab_hdr (ibfd).contents
8398 != (unsigned char *) locsyms))
8399 free (locsyms);
8400 return ret;
8401 }
8402
8403 if (h != NULL)
8404 {
8405 if (h->root.type == bfd_link_hash_defined
8406 || h->root.type == bfd_link_hash_defweak)
8407 value = h->root.u.def.value;
8408 else if (h->root.type == bfd_link_hash_undefweak)
8409 value = 0;
8410 else
8411 {
8412 found_tls_get_addr_arg = 0;
8413 continue;
8414 }
8415 }
8416 else
8417 /* Symbols referenced by TLS relocs must be of type
8418 STT_TLS. So no need for .opd local sym adjust. */
8419 value = sym->st_value;
8420
8421 ok_tprel = FALSE;
8422 is_local = FALSE;
8423 if (h == NULL
8424 || !h->def_dynamic)
8425 {
8426 is_local = TRUE;
8427 if (h != NULL
8428 && h->root.type == bfd_link_hash_undefweak)
8429 ok_tprel = TRUE;
8430 else if (sym_sec != NULL
8431 && sym_sec->output_section != NULL)
8432 {
8433 value += sym_sec->output_offset;
8434 value += sym_sec->output_section->vma;
8435 value -= htab->elf.tls_sec->vma;
8436 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
8437 < (bfd_vma) 1 << 32);
8438 }
8439 }
8440
8441 r_type = ELF64_R_TYPE (rel->r_info);
8442 /* If this section has old-style __tls_get_addr calls
8443 without marker relocs, then check that each
8444 __tls_get_addr call reloc is preceded by a reloc
8445 that conceivably belongs to the __tls_get_addr arg
8446 setup insn. If we don't find matching arg setup
8447 relocs, don't do any tls optimization. */
8448 if (pass == 0
8449 && sec->has_tls_get_addr_call
8450 && h != NULL
8451 && (h == &htab->tls_get_addr->elf
8452 || h == &htab->tls_get_addr_fd->elf)
8453 && !found_tls_get_addr_arg
8454 && is_branch_reloc (r_type))
8455 {
8456 info->callbacks->minfo (_("%H __tls_get_addr lost arg, "
8457 "TLS optimization disabled\n"),
8458 ibfd, sec, rel->r_offset);
8459 ret = TRUE;
8460 goto err_free_rel;
8461 }
8462
8463 found_tls_get_addr_arg = 0;
8464 switch (r_type)
8465 {
8466 case R_PPC64_GOT_TLSLD16:
8467 case R_PPC64_GOT_TLSLD16_LO:
8468 expecting_tls_get_addr = 1;
8469 found_tls_get_addr_arg = 1;
8470 /* Fall through. */
8471
8472 case R_PPC64_GOT_TLSLD16_HI:
8473 case R_PPC64_GOT_TLSLD16_HA:
8474 /* These relocs should never be against a symbol
8475 defined in a shared lib. Leave them alone if
8476 that turns out to be the case. */
8477 if (!is_local)
8478 continue;
8479
8480 /* LD -> LE */
8481 tls_set = 0;
8482 tls_clear = TLS_LD;
8483 tls_type = TLS_TLS | TLS_LD;
8484 break;
8485
8486 case R_PPC64_GOT_TLSGD16:
8487 case R_PPC64_GOT_TLSGD16_LO:
8488 expecting_tls_get_addr = 1;
8489 found_tls_get_addr_arg = 1;
8490 /* Fall through. */
8491
8492 case R_PPC64_GOT_TLSGD16_HI:
8493 case R_PPC64_GOT_TLSGD16_HA:
8494 if (ok_tprel)
8495 /* GD -> LE */
8496 tls_set = 0;
8497 else
8498 /* GD -> IE */
8499 tls_set = TLS_TLS | TLS_TPRELGD;
8500 tls_clear = TLS_GD;
8501 tls_type = TLS_TLS | TLS_GD;
8502 break;
8503
8504 case R_PPC64_GOT_TPREL16_DS:
8505 case R_PPC64_GOT_TPREL16_LO_DS:
8506 case R_PPC64_GOT_TPREL16_HI:
8507 case R_PPC64_GOT_TPREL16_HA:
8508 if (ok_tprel)
8509 {
8510 /* IE -> LE */
8511 tls_set = 0;
8512 tls_clear = TLS_TPREL;
8513 tls_type = TLS_TLS | TLS_TPREL;
8514 break;
8515 }
8516 continue;
8517
8518 case R_PPC64_TLSGD:
8519 case R_PPC64_TLSLD:
8520 found_tls_get_addr_arg = 1;
8521 /* Fall through. */
8522
8523 case R_PPC64_TLS:
8524 case R_PPC64_TOC16:
8525 case R_PPC64_TOC16_LO:
8526 if (sym_sec == NULL || sym_sec != toc)
8527 continue;
8528
8529 /* Mark this toc entry as referenced by a TLS
8530 code sequence. We can do that now in the
8531 case of R_PPC64_TLS, and after checking for
8532 tls_get_addr for the TOC16 relocs. */
8533 if (toc_ref == NULL)
8534 toc_ref = bfd_zmalloc (toc->output_section->rawsize / 8);
8535 if (toc_ref == NULL)
8536 goto err_free_rel;
8537
8538 if (h != NULL)
8539 value = h->root.u.def.value;
8540 else
8541 value = sym->st_value;
8542 value += rel->r_addend;
8543 if (value % 8 != 0)
8544 continue;
8545 BFD_ASSERT (value < toc->size
8546 && toc->output_offset % 8 == 0);
8547 toc_ref_index = (value + toc->output_offset) / 8;
8548 if (r_type == R_PPC64_TLS
8549 || r_type == R_PPC64_TLSGD
8550 || r_type == R_PPC64_TLSLD)
8551 {
8552 toc_ref[toc_ref_index] = 1;
8553 continue;
8554 }
8555
8556 if (pass != 0 && toc_ref[toc_ref_index] == 0)
8557 continue;
8558
8559 tls_set = 0;
8560 tls_clear = 0;
8561 expecting_tls_get_addr = 2;
8562 break;
8563
8564 case R_PPC64_TPREL64:
8565 if (pass == 0
8566 || sec != toc
8567 || toc_ref == NULL
8568 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
8569 continue;
8570 if (ok_tprel)
8571 {
8572 /* IE -> LE */
8573 tls_set = TLS_EXPLICIT;
8574 tls_clear = TLS_TPREL;
8575 break;
8576 }
8577 continue;
8578
8579 case R_PPC64_DTPMOD64:
8580 if (pass == 0
8581 || sec != toc
8582 || toc_ref == NULL
8583 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
8584 continue;
8585 if (rel + 1 < relend
8586 && (rel[1].r_info
8587 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
8588 && rel[1].r_offset == rel->r_offset + 8)
8589 {
8590 if (ok_tprel)
8591 /* GD -> LE */
8592 tls_set = TLS_EXPLICIT | TLS_GD;
8593 else
8594 /* GD -> IE */
8595 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
8596 tls_clear = TLS_GD;
8597 }
8598 else
8599 {
8600 if (!is_local)
8601 continue;
8602
8603 /* LD -> LE */
8604 tls_set = TLS_EXPLICIT;
8605 tls_clear = TLS_LD;
8606 }
8607 break;
8608
8609 default:
8610 continue;
8611 }
8612
8613 if (pass == 0)
8614 {
8615 if (!expecting_tls_get_addr
8616 || !sec->has_tls_get_addr_call)
8617 continue;
8618
8619 if (rel + 1 < relend
8620 && branch_reloc_hash_match (ibfd, rel + 1,
8621 htab->tls_get_addr,
8622 htab->tls_get_addr_fd))
8623 {
8624 if (expecting_tls_get_addr == 2)
8625 {
8626 /* Check for toc tls entries. */
8627 unsigned char *toc_tls;
8628 int retval;
8629
8630 retval = get_tls_mask (&toc_tls, NULL, NULL,
8631 &locsyms,
8632 rel, ibfd);
8633 if (retval == 0)
8634 goto err_free_rel;
8635 if (toc_tls != NULL)
8636 {
8637 if ((*toc_tls & (TLS_GD | TLS_LD)) != 0)
8638 found_tls_get_addr_arg = 1;
8639 if (retval > 1)
8640 toc_ref[toc_ref_index] = 1;
8641 }
8642 }
8643 continue;
8644 }
8645
8646 if (expecting_tls_get_addr != 1)
8647 continue;
8648
8649 /* Uh oh, we didn't find the expected call. We
8650 could just mark this symbol to exclude it
8651 from tls optimization but it's safer to skip
8652 the entire optimization. */
8653 /* xgettext:c-format */
8654 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
8655 "TLS optimization disabled\n"),
8656 ibfd, sec, rel->r_offset);
8657 ret = TRUE;
8658 goto err_free_rel;
8659 }
8660
8661 if (expecting_tls_get_addr && htab->tls_get_addr != NULL)
8662 {
8663 struct plt_entry *ent;
8664 for (ent = htab->tls_get_addr->elf.plt.plist;
8665 ent != NULL;
8666 ent = ent->next)
8667 if (ent->addend == 0)
8668 {
8669 if (ent->plt.refcount > 0)
8670 {
8671 ent->plt.refcount -= 1;
8672 expecting_tls_get_addr = 0;
8673 }
8674 break;
8675 }
8676 }
8677
8678 if (expecting_tls_get_addr && htab->tls_get_addr_fd != NULL)
8679 {
8680 struct plt_entry *ent;
8681 for (ent = htab->tls_get_addr_fd->elf.plt.plist;
8682 ent != NULL;
8683 ent = ent->next)
8684 if (ent->addend == 0)
8685 {
8686 if (ent->plt.refcount > 0)
8687 ent->plt.refcount -= 1;
8688 break;
8689 }
8690 }
8691
8692 if (tls_clear == 0)
8693 continue;
8694
8695 if ((tls_set & TLS_EXPLICIT) == 0)
8696 {
8697 struct got_entry *ent;
8698
8699 /* Adjust got entry for this reloc. */
8700 if (h != NULL)
8701 ent = h->got.glist;
8702 else
8703 ent = elf_local_got_ents (ibfd)[r_symndx];
8704
8705 for (; ent != NULL; ent = ent->next)
8706 if (ent->addend == rel->r_addend
8707 && ent->owner == ibfd
8708 && ent->tls_type == tls_type)
8709 break;
8710 if (ent == NULL)
8711 abort ();
8712
8713 if (tls_set == 0)
8714 {
8715 /* We managed to get rid of a got entry. */
8716 if (ent->got.refcount > 0)
8717 ent->got.refcount -= 1;
8718 }
8719 }
8720 else
8721 {
8722 /* If we got rid of a DTPMOD/DTPREL reloc pair then
8723 we'll lose one or two dyn relocs. */
8724 if (!dec_dynrel_count (rel->r_info, sec, info,
8725 NULL, h, sym))
8726 return FALSE;
8727
8728 if (tls_set == (TLS_EXPLICIT | TLS_GD))
8729 {
8730 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
8731 NULL, h, sym))
8732 return FALSE;
8733 }
8734 }
8735
8736 *tls_mask |= tls_set;
8737 *tls_mask &= ~tls_clear;
8738 }
8739
8740 if (elf_section_data (sec)->relocs != relstart)
8741 free (relstart);
8742 }
8743
8744 if (locsyms != NULL
8745 && (elf_symtab_hdr (ibfd).contents != (unsigned char *) locsyms))
8746 {
8747 if (!info->keep_memory)
8748 free (locsyms);
8749 else
8750 elf_symtab_hdr (ibfd).contents = (unsigned char *) locsyms;
8751 }
8752 }
8753
8754 if (toc_ref != NULL)
8755 free (toc_ref);
8756 htab->do_tls_opt = 1;
8757 return TRUE;
8758 }
8759
8760 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
8761 the values of any global symbols in a toc section that has been
8762 edited. Globals in toc sections should be a rarity, so this function
8763 sets a flag if any are found in toc sections other than the one just
8764 edited, so that further hash table traversals can be avoided. */
8765
8766 struct adjust_toc_info
8767 {
8768 asection *toc;
8769 unsigned long *skip;
8770 bfd_boolean global_toc_syms;
8771 };
8772
8773 enum toc_skip_enum { ref_from_discarded = 1, can_optimize = 2 };
8774
8775 static bfd_boolean
8776 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
8777 {
8778 struct ppc_link_hash_entry *eh;
8779 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
8780 unsigned long i;
8781
8782 if (h->root.type != bfd_link_hash_defined
8783 && h->root.type != bfd_link_hash_defweak)
8784 return TRUE;
8785
8786 eh = (struct ppc_link_hash_entry *) h;
8787 if (eh->adjust_done)
8788 return TRUE;
8789
8790 if (eh->elf.root.u.def.section == toc_inf->toc)
8791 {
8792 if (eh->elf.root.u.def.value > toc_inf->toc->rawsize)
8793 i = toc_inf->toc->rawsize >> 3;
8794 else
8795 i = eh->elf.root.u.def.value >> 3;
8796
8797 if ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0)
8798 {
8799 _bfd_error_handler
8800 (_("%s defined on removed toc entry"), eh->elf.root.root.string);
8801 do
8802 ++i;
8803 while ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0);
8804 eh->elf.root.u.def.value = (bfd_vma) i << 3;
8805 }
8806
8807 eh->elf.root.u.def.value -= toc_inf->skip[i];
8808 eh->adjust_done = 1;
8809 }
8810 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
8811 toc_inf->global_toc_syms = TRUE;
8812
8813 return TRUE;
8814 }
8815
8816 /* Return TRUE iff INSN with a relocation of R_TYPE is one we expect
8817 on a _LO variety toc/got reloc. */
8818
8819 static bfd_boolean
8820 ok_lo_toc_insn (unsigned int insn, enum elf_ppc64_reloc_type r_type)
8821 {
8822 return ((insn & (0x3f << 26)) == 12u << 26 /* addic */
8823 || (insn & (0x3f << 26)) == 14u << 26 /* addi */
8824 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
8825 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
8826 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
8827 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
8828 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
8829 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
8830 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
8831 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
8832 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
8833 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
8834 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
8835 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
8836 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
8837 || (insn & (0x3f << 26)) == 56u << 26 /* lq,lfq */
8838 || ((insn & (0x3f << 26)) == 57u << 26 /* lxsd,lxssp,lfdp */
8839 /* Exclude lfqu by testing reloc. If relocs are ever
8840 defined for the reduced D field in psq_lu then those
8841 will need testing too. */
8842 && r_type != R_PPC64_TOC16_LO && r_type != R_PPC64_GOT16_LO)
8843 || ((insn & (0x3f << 26)) == 58u << 26 /* ld,lwa */
8844 && (insn & 1) == 0)
8845 || (insn & (0x3f << 26)) == 60u << 26 /* stfq */
8846 || ((insn & (0x3f << 26)) == 61u << 26 /* lxv,stx{v,sd,ssp},stfdp */
8847 /* Exclude stfqu. psq_stu as above for psq_lu. */
8848 && r_type != R_PPC64_TOC16_LO && r_type != R_PPC64_GOT16_LO)
8849 || ((insn & (0x3f << 26)) == 62u << 26 /* std,stq */
8850 && (insn & 1) == 0));
8851 }
8852
8853 /* Examine all relocs referencing .toc sections in order to remove
8854 unused .toc entries. */
8855
8856 bfd_boolean
8857 ppc64_elf_edit_toc (struct bfd_link_info *info)
8858 {
8859 bfd *ibfd;
8860 struct adjust_toc_info toc_inf;
8861 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8862
8863 htab->do_toc_opt = 1;
8864 toc_inf.global_toc_syms = TRUE;
8865 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
8866 {
8867 asection *toc, *sec;
8868 Elf_Internal_Shdr *symtab_hdr;
8869 Elf_Internal_Sym *local_syms;
8870 Elf_Internal_Rela *relstart, *rel, *toc_relocs;
8871 unsigned long *skip, *drop;
8872 unsigned char *used;
8873 unsigned char *keep, last, some_unused;
8874
8875 if (!is_ppc64_elf (ibfd))
8876 continue;
8877
8878 toc = bfd_get_section_by_name (ibfd, ".toc");
8879 if (toc == NULL
8880 || toc->size == 0
8881 || toc->sec_info_type == SEC_INFO_TYPE_JUST_SYMS
8882 || discarded_section (toc))
8883 continue;
8884
8885 toc_relocs = NULL;
8886 local_syms = NULL;
8887 symtab_hdr = &elf_symtab_hdr (ibfd);
8888
8889 /* Look at sections dropped from the final link. */
8890 skip = NULL;
8891 relstart = NULL;
8892 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8893 {
8894 if (sec->reloc_count == 0
8895 || !discarded_section (sec)
8896 || get_opd_info (sec)
8897 || (sec->flags & SEC_ALLOC) == 0
8898 || (sec->flags & SEC_DEBUGGING) != 0)
8899 continue;
8900
8901 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
8902 if (relstart == NULL)
8903 goto error_ret;
8904
8905 /* Run through the relocs to see which toc entries might be
8906 unused. */
8907 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8908 {
8909 enum elf_ppc64_reloc_type r_type;
8910 unsigned long r_symndx;
8911 asection *sym_sec;
8912 struct elf_link_hash_entry *h;
8913 Elf_Internal_Sym *sym;
8914 bfd_vma val;
8915
8916 r_type = ELF64_R_TYPE (rel->r_info);
8917 switch (r_type)
8918 {
8919 default:
8920 continue;
8921
8922 case R_PPC64_TOC16:
8923 case R_PPC64_TOC16_LO:
8924 case R_PPC64_TOC16_HI:
8925 case R_PPC64_TOC16_HA:
8926 case R_PPC64_TOC16_DS:
8927 case R_PPC64_TOC16_LO_DS:
8928 break;
8929 }
8930
8931 r_symndx = ELF64_R_SYM (rel->r_info);
8932 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8933 r_symndx, ibfd))
8934 goto error_ret;
8935
8936 if (sym_sec != toc)
8937 continue;
8938
8939 if (h != NULL)
8940 val = h->root.u.def.value;
8941 else
8942 val = sym->st_value;
8943 val += rel->r_addend;
8944
8945 if (val >= toc->size)
8946 continue;
8947
8948 /* Anything in the toc ought to be aligned to 8 bytes.
8949 If not, don't mark as unused. */
8950 if (val & 7)
8951 continue;
8952
8953 if (skip == NULL)
8954 {
8955 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
8956 if (skip == NULL)
8957 goto error_ret;
8958 }
8959
8960 skip[val >> 3] = ref_from_discarded;
8961 }
8962
8963 if (elf_section_data (sec)->relocs != relstart)
8964 free (relstart);
8965 }
8966
8967 /* For largetoc loads of address constants, we can convert
8968 . addis rx,2,addr@got@ha
8969 . ld ry,addr@got@l(rx)
8970 to
8971 . addis rx,2,addr@toc@ha
8972 . addi ry,rx,addr@toc@l
8973 when addr is within 2G of the toc pointer. This then means
8974 that the word storing "addr" in the toc is no longer needed. */
8975
8976 if (!ppc64_elf_tdata (ibfd)->has_small_toc_reloc
8977 && toc->output_section->rawsize < (bfd_vma) 1 << 31
8978 && toc->reloc_count != 0)
8979 {
8980 /* Read toc relocs. */
8981 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
8982 info->keep_memory);
8983 if (toc_relocs == NULL)
8984 goto error_ret;
8985
8986 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
8987 {
8988 enum elf_ppc64_reloc_type r_type;
8989 unsigned long r_symndx;
8990 asection *sym_sec;
8991 struct elf_link_hash_entry *h;
8992 Elf_Internal_Sym *sym;
8993 bfd_vma val, addr;
8994
8995 r_type = ELF64_R_TYPE (rel->r_info);
8996 if (r_type != R_PPC64_ADDR64)
8997 continue;
8998
8999 r_symndx = ELF64_R_SYM (rel->r_info);
9000 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9001 r_symndx, ibfd))
9002 goto error_ret;
9003
9004 if (sym_sec == NULL
9005 || sym_sec->output_section == NULL
9006 || discarded_section (sym_sec))
9007 continue;
9008
9009 if (!SYMBOL_REFERENCES_LOCAL (info, h))
9010 continue;
9011
9012 if (h != NULL)
9013 {
9014 if (h->type == STT_GNU_IFUNC)
9015 continue;
9016 val = h->root.u.def.value;
9017 }
9018 else
9019 {
9020 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
9021 continue;
9022 val = sym->st_value;
9023 }
9024 val += rel->r_addend;
9025 val += sym_sec->output_section->vma + sym_sec->output_offset;
9026
9027 /* We don't yet know the exact toc pointer value, but we
9028 know it will be somewhere in the toc section. Don't
9029 optimize if the difference from any possible toc
9030 pointer is outside [ff..f80008000, 7fff7fff]. */
9031 addr = toc->output_section->vma + TOC_BASE_OFF;
9032 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
9033 continue;
9034
9035 addr = toc->output_section->vma + toc->output_section->rawsize;
9036 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
9037 continue;
9038
9039 if (skip == NULL)
9040 {
9041 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
9042 if (skip == NULL)
9043 goto error_ret;
9044 }
9045
9046 skip[rel->r_offset >> 3]
9047 |= can_optimize | ((rel - toc_relocs) << 2);
9048 }
9049 }
9050
9051 if (skip == NULL)
9052 continue;
9053
9054 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
9055 if (used == NULL)
9056 {
9057 error_ret:
9058 if (local_syms != NULL
9059 && symtab_hdr->contents != (unsigned char *) local_syms)
9060 free (local_syms);
9061 if (sec != NULL
9062 && relstart != NULL
9063 && elf_section_data (sec)->relocs != relstart)
9064 free (relstart);
9065 if (toc_relocs != NULL
9066 && elf_section_data (toc)->relocs != toc_relocs)
9067 free (toc_relocs);
9068 if (skip != NULL)
9069 free (skip);
9070 return FALSE;
9071 }
9072
9073 /* Now check all kept sections that might reference the toc.
9074 Check the toc itself last. */
9075 for (sec = (ibfd->sections == toc && toc->next ? toc->next
9076 : ibfd->sections);
9077 sec != NULL;
9078 sec = (sec == toc ? NULL
9079 : sec->next == NULL ? toc
9080 : sec->next == toc && toc->next ? toc->next
9081 : sec->next))
9082 {
9083 int repeat;
9084
9085 if (sec->reloc_count == 0
9086 || discarded_section (sec)
9087 || get_opd_info (sec)
9088 || (sec->flags & SEC_ALLOC) == 0
9089 || (sec->flags & SEC_DEBUGGING) != 0)
9090 continue;
9091
9092 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
9093 info->keep_memory);
9094 if (relstart == NULL)
9095 {
9096 free (used);
9097 goto error_ret;
9098 }
9099
9100 /* Mark toc entries referenced as used. */
9101 do
9102 {
9103 repeat = 0;
9104 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
9105 {
9106 enum elf_ppc64_reloc_type r_type;
9107 unsigned long r_symndx;
9108 asection *sym_sec;
9109 struct elf_link_hash_entry *h;
9110 Elf_Internal_Sym *sym;
9111 bfd_vma val;
9112 enum {no_check, check_lo, check_ha} insn_check;
9113
9114 r_type = ELF64_R_TYPE (rel->r_info);
9115 switch (r_type)
9116 {
9117 default:
9118 insn_check = no_check;
9119 break;
9120
9121 case R_PPC64_GOT_TLSLD16_HA:
9122 case R_PPC64_GOT_TLSGD16_HA:
9123 case R_PPC64_GOT_TPREL16_HA:
9124 case R_PPC64_GOT_DTPREL16_HA:
9125 case R_PPC64_GOT16_HA:
9126 case R_PPC64_TOC16_HA:
9127 insn_check = check_ha;
9128 break;
9129
9130 case R_PPC64_GOT_TLSLD16_LO:
9131 case R_PPC64_GOT_TLSGD16_LO:
9132 case R_PPC64_GOT_TPREL16_LO_DS:
9133 case R_PPC64_GOT_DTPREL16_LO_DS:
9134 case R_PPC64_GOT16_LO:
9135 case R_PPC64_GOT16_LO_DS:
9136 case R_PPC64_TOC16_LO:
9137 case R_PPC64_TOC16_LO_DS:
9138 insn_check = check_lo;
9139 break;
9140 }
9141
9142 if (insn_check != no_check)
9143 {
9144 bfd_vma off = rel->r_offset & ~3;
9145 unsigned char buf[4];
9146 unsigned int insn;
9147
9148 if (!bfd_get_section_contents (ibfd, sec, buf, off, 4))
9149 {
9150 free (used);
9151 goto error_ret;
9152 }
9153 insn = bfd_get_32 (ibfd, buf);
9154 if (insn_check == check_lo
9155 ? !ok_lo_toc_insn (insn, r_type)
9156 : ((insn & ((0x3f << 26) | 0x1f << 16))
9157 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */))
9158 {
9159 char str[12];
9160
9161 ppc64_elf_tdata (ibfd)->unexpected_toc_insn = 1;
9162 sprintf (str, "%#08x", insn);
9163 info->callbacks->einfo
9164 /* xgettext:c-format */
9165 (_("%H: toc optimization is not supported for"
9166 " %s instruction.\n"),
9167 ibfd, sec, rel->r_offset & ~3, str);
9168 }
9169 }
9170
9171 switch (r_type)
9172 {
9173 case R_PPC64_TOC16:
9174 case R_PPC64_TOC16_LO:
9175 case R_PPC64_TOC16_HI:
9176 case R_PPC64_TOC16_HA:
9177 case R_PPC64_TOC16_DS:
9178 case R_PPC64_TOC16_LO_DS:
9179 /* In case we're taking addresses of toc entries. */
9180 case R_PPC64_ADDR64:
9181 break;
9182
9183 default:
9184 continue;
9185 }
9186
9187 r_symndx = ELF64_R_SYM (rel->r_info);
9188 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9189 r_symndx, ibfd))
9190 {
9191 free (used);
9192 goto error_ret;
9193 }
9194
9195 if (sym_sec != toc)
9196 continue;
9197
9198 if (h != NULL)
9199 val = h->root.u.def.value;
9200 else
9201 val = sym->st_value;
9202 val += rel->r_addend;
9203
9204 if (val >= toc->size)
9205 continue;
9206
9207 if ((skip[val >> 3] & can_optimize) != 0)
9208 {
9209 bfd_vma off;
9210 unsigned char opc;
9211
9212 switch (r_type)
9213 {
9214 case R_PPC64_TOC16_HA:
9215 break;
9216
9217 case R_PPC64_TOC16_LO_DS:
9218 off = rel->r_offset;
9219 off += (bfd_big_endian (ibfd) ? -2 : 3);
9220 if (!bfd_get_section_contents (ibfd, sec, &opc,
9221 off, 1))
9222 {
9223 free (used);
9224 goto error_ret;
9225 }
9226 if ((opc & (0x3f << 2)) == (58u << 2))
9227 break;
9228 /* Fall through. */
9229
9230 default:
9231 /* Wrong sort of reloc, or not a ld. We may
9232 as well clear ref_from_discarded too. */
9233 skip[val >> 3] = 0;
9234 }
9235 }
9236
9237 if (sec != toc)
9238 used[val >> 3] = 1;
9239 /* For the toc section, we only mark as used if this
9240 entry itself isn't unused. */
9241 else if ((used[rel->r_offset >> 3]
9242 || !(skip[rel->r_offset >> 3] & ref_from_discarded))
9243 && !used[val >> 3])
9244 {
9245 /* Do all the relocs again, to catch reference
9246 chains. */
9247 repeat = 1;
9248 used[val >> 3] = 1;
9249 }
9250 }
9251 }
9252 while (repeat);
9253
9254 if (elf_section_data (sec)->relocs != relstart)
9255 free (relstart);
9256 }
9257
9258 /* Merge the used and skip arrays. Assume that TOC
9259 doublewords not appearing as either used or unused belong
9260 to an entry more than one doubleword in size. */
9261 for (drop = skip, keep = used, last = 0, some_unused = 0;
9262 drop < skip + (toc->size + 7) / 8;
9263 ++drop, ++keep)
9264 {
9265 if (*keep)
9266 {
9267 *drop &= ~ref_from_discarded;
9268 if ((*drop & can_optimize) != 0)
9269 some_unused = 1;
9270 last = 0;
9271 }
9272 else if ((*drop & ref_from_discarded) != 0)
9273 {
9274 some_unused = 1;
9275 last = ref_from_discarded;
9276 }
9277 else
9278 *drop = last;
9279 }
9280
9281 free (used);
9282
9283 if (some_unused)
9284 {
9285 bfd_byte *contents, *src;
9286 unsigned long off;
9287 Elf_Internal_Sym *sym;
9288 bfd_boolean local_toc_syms = FALSE;
9289
9290 /* Shuffle the toc contents, and at the same time convert the
9291 skip array from booleans into offsets. */
9292 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
9293 goto error_ret;
9294
9295 elf_section_data (toc)->this_hdr.contents = contents;
9296
9297 for (src = contents, off = 0, drop = skip;
9298 src < contents + toc->size;
9299 src += 8, ++drop)
9300 {
9301 if ((*drop & (can_optimize | ref_from_discarded)) != 0)
9302 off += 8;
9303 else if (off != 0)
9304 {
9305 *drop = off;
9306 memcpy (src - off, src, 8);
9307 }
9308 }
9309 *drop = off;
9310 toc->rawsize = toc->size;
9311 toc->size = src - contents - off;
9312
9313 /* Adjust addends for relocs against the toc section sym,
9314 and optimize any accesses we can. */
9315 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
9316 {
9317 if (sec->reloc_count == 0
9318 || discarded_section (sec))
9319 continue;
9320
9321 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
9322 info->keep_memory);
9323 if (relstart == NULL)
9324 goto error_ret;
9325
9326 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
9327 {
9328 enum elf_ppc64_reloc_type r_type;
9329 unsigned long r_symndx;
9330 asection *sym_sec;
9331 struct elf_link_hash_entry *h;
9332 bfd_vma val;
9333
9334 r_type = ELF64_R_TYPE (rel->r_info);
9335 switch (r_type)
9336 {
9337 default:
9338 continue;
9339
9340 case R_PPC64_TOC16:
9341 case R_PPC64_TOC16_LO:
9342 case R_PPC64_TOC16_HI:
9343 case R_PPC64_TOC16_HA:
9344 case R_PPC64_TOC16_DS:
9345 case R_PPC64_TOC16_LO_DS:
9346 case R_PPC64_ADDR64:
9347 break;
9348 }
9349
9350 r_symndx = ELF64_R_SYM (rel->r_info);
9351 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9352 r_symndx, ibfd))
9353 goto error_ret;
9354
9355 if (sym_sec != toc)
9356 continue;
9357
9358 if (h != NULL)
9359 val = h->root.u.def.value;
9360 else
9361 {
9362 val = sym->st_value;
9363 if (val != 0)
9364 local_toc_syms = TRUE;
9365 }
9366
9367 val += rel->r_addend;
9368
9369 if (val > toc->rawsize)
9370 val = toc->rawsize;
9371 else if ((skip[val >> 3] & ref_from_discarded) != 0)
9372 continue;
9373 else if ((skip[val >> 3] & can_optimize) != 0)
9374 {
9375 Elf_Internal_Rela *tocrel
9376 = toc_relocs + (skip[val >> 3] >> 2);
9377 unsigned long tsym = ELF64_R_SYM (tocrel->r_info);
9378
9379 switch (r_type)
9380 {
9381 case R_PPC64_TOC16_HA:
9382 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_TOC16_HA);
9383 break;
9384
9385 case R_PPC64_TOC16_LO_DS:
9386 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_LO_DS_OPT);
9387 break;
9388
9389 default:
9390 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
9391 ppc_howto_init ();
9392 info->callbacks->einfo
9393 /* xgettext:c-format */
9394 (_("%H: %s references "
9395 "optimized away TOC entry\n"),
9396 ibfd, sec, rel->r_offset,
9397 ppc64_elf_howto_table[r_type]->name);
9398 bfd_set_error (bfd_error_bad_value);
9399 goto error_ret;
9400 }
9401 rel->r_addend = tocrel->r_addend;
9402 elf_section_data (sec)->relocs = relstart;
9403 continue;
9404 }
9405
9406 if (h != NULL || sym->st_value != 0)
9407 continue;
9408
9409 rel->r_addend -= skip[val >> 3];
9410 elf_section_data (sec)->relocs = relstart;
9411 }
9412
9413 if (elf_section_data (sec)->relocs != relstart)
9414 free (relstart);
9415 }
9416
9417 /* We shouldn't have local or global symbols defined in the TOC,
9418 but handle them anyway. */
9419 if (local_syms != NULL)
9420 for (sym = local_syms;
9421 sym < local_syms + symtab_hdr->sh_info;
9422 ++sym)
9423 if (sym->st_value != 0
9424 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
9425 {
9426 unsigned long i;
9427
9428 if (sym->st_value > toc->rawsize)
9429 i = toc->rawsize >> 3;
9430 else
9431 i = sym->st_value >> 3;
9432
9433 if ((skip[i] & (ref_from_discarded | can_optimize)) != 0)
9434 {
9435 if (local_toc_syms)
9436 _bfd_error_handler
9437 (_("%s defined on removed toc entry"),
9438 bfd_elf_sym_name (ibfd, symtab_hdr, sym, NULL));
9439 do
9440 ++i;
9441 while ((skip[i] & (ref_from_discarded | can_optimize)));
9442 sym->st_value = (bfd_vma) i << 3;
9443 }
9444
9445 sym->st_value -= skip[i];
9446 symtab_hdr->contents = (unsigned char *) local_syms;
9447 }
9448
9449 /* Adjust any global syms defined in this toc input section. */
9450 if (toc_inf.global_toc_syms)
9451 {
9452 toc_inf.toc = toc;
9453 toc_inf.skip = skip;
9454 toc_inf.global_toc_syms = FALSE;
9455 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
9456 &toc_inf);
9457 }
9458
9459 if (toc->reloc_count != 0)
9460 {
9461 Elf_Internal_Shdr *rel_hdr;
9462 Elf_Internal_Rela *wrel;
9463 bfd_size_type sz;
9464
9465 /* Remove unused toc relocs, and adjust those we keep. */
9466 if (toc_relocs == NULL)
9467 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
9468 info->keep_memory);
9469 if (toc_relocs == NULL)
9470 goto error_ret;
9471
9472 wrel = toc_relocs;
9473 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
9474 if ((skip[rel->r_offset >> 3]
9475 & (ref_from_discarded | can_optimize)) == 0)
9476 {
9477 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
9478 wrel->r_info = rel->r_info;
9479 wrel->r_addend = rel->r_addend;
9480 ++wrel;
9481 }
9482 else if (!dec_dynrel_count (rel->r_info, toc, info,
9483 &local_syms, NULL, NULL))
9484 goto error_ret;
9485
9486 elf_section_data (toc)->relocs = toc_relocs;
9487 toc->reloc_count = wrel - toc_relocs;
9488 rel_hdr = _bfd_elf_single_rel_hdr (toc);
9489 sz = rel_hdr->sh_entsize;
9490 rel_hdr->sh_size = toc->reloc_count * sz;
9491 }
9492 }
9493 else if (toc_relocs != NULL
9494 && elf_section_data (toc)->relocs != toc_relocs)
9495 free (toc_relocs);
9496
9497 if (local_syms != NULL
9498 && symtab_hdr->contents != (unsigned char *) local_syms)
9499 {
9500 if (!info->keep_memory)
9501 free (local_syms);
9502 else
9503 symtab_hdr->contents = (unsigned char *) local_syms;
9504 }
9505 free (skip);
9506 }
9507
9508 return TRUE;
9509 }
9510
9511 /* Return true iff input section I references the TOC using
9512 instructions limited to +/-32k offsets. */
9513
9514 bfd_boolean
9515 ppc64_elf_has_small_toc_reloc (asection *i)
9516 {
9517 return (is_ppc64_elf (i->owner)
9518 && ppc64_elf_tdata (i->owner)->has_small_toc_reloc);
9519 }
9520
9521 /* Allocate space for one GOT entry. */
9522
9523 static void
9524 allocate_got (struct elf_link_hash_entry *h,
9525 struct bfd_link_info *info,
9526 struct got_entry *gent)
9527 {
9528 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9529 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
9530 int entsize = (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)
9531 ? 16 : 8);
9532 int rentsize = (gent->tls_type & eh->tls_mask & TLS_GD
9533 ? 2 : 1) * sizeof (Elf64_External_Rela);
9534 asection *got = ppc64_elf_tdata (gent->owner)->got;
9535
9536 gent->got.offset = got->size;
9537 got->size += entsize;
9538
9539 if (h->type == STT_GNU_IFUNC)
9540 {
9541 htab->elf.irelplt->size += rentsize;
9542 htab->got_reli_size += rentsize;
9543 }
9544 else if (((bfd_link_pic (info)
9545 && !((gent->tls_type & TLS_TPREL) != 0
9546 && bfd_link_executable (info)
9547 && SYMBOL_REFERENCES_LOCAL (info, h)))
9548 || (htab->elf.dynamic_sections_created
9549 && h->dynindx != -1
9550 && !SYMBOL_REFERENCES_LOCAL (info, h)))
9551 && !UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
9552 {
9553 asection *relgot = ppc64_elf_tdata (gent->owner)->relgot;
9554 relgot->size += rentsize;
9555 }
9556 }
9557
9558 /* This function merges got entries in the same toc group. */
9559
9560 static void
9561 merge_got_entries (struct got_entry **pent)
9562 {
9563 struct got_entry *ent, *ent2;
9564
9565 for (ent = *pent; ent != NULL; ent = ent->next)
9566 if (!ent->is_indirect)
9567 for (ent2 = ent->next; ent2 != NULL; ent2 = ent2->next)
9568 if (!ent2->is_indirect
9569 && ent2->addend == ent->addend
9570 && ent2->tls_type == ent->tls_type
9571 && elf_gp (ent2->owner) == elf_gp (ent->owner))
9572 {
9573 ent2->is_indirect = TRUE;
9574 ent2->got.ent = ent;
9575 }
9576 }
9577
9578 /* If H is undefined, make it dynamic if that makes sense. */
9579
9580 static bfd_boolean
9581 ensure_undef_dynamic (struct bfd_link_info *info,
9582 struct elf_link_hash_entry *h)
9583 {
9584 struct elf_link_hash_table *htab = elf_hash_table (info);
9585
9586 if (htab->dynamic_sections_created
9587 && ((info->dynamic_undefined_weak != 0
9588 && h->root.type == bfd_link_hash_undefweak)
9589 || h->root.type == bfd_link_hash_undefined)
9590 && h->dynindx == -1
9591 && !h->forced_local
9592 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
9593 return bfd_elf_link_record_dynamic_symbol (info, h);
9594 return TRUE;
9595 }
9596
9597 /* Allocate space in .plt, .got and associated reloc sections for
9598 dynamic relocs. */
9599
9600 static bfd_boolean
9601 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
9602 {
9603 struct bfd_link_info *info;
9604 struct ppc_link_hash_table *htab;
9605 asection *s;
9606 struct ppc_link_hash_entry *eh;
9607 struct got_entry **pgent, *gent;
9608
9609 if (h->root.type == bfd_link_hash_indirect)
9610 return TRUE;
9611
9612 info = (struct bfd_link_info *) inf;
9613 htab = ppc_hash_table (info);
9614 if (htab == NULL)
9615 return FALSE;
9616
9617 eh = (struct ppc_link_hash_entry *) h;
9618 /* Run through the TLS GD got entries first if we're changing them
9619 to TPREL. */
9620 if ((eh->tls_mask & TLS_TPRELGD) != 0)
9621 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9622 if (gent->got.refcount > 0
9623 && (gent->tls_type & TLS_GD) != 0)
9624 {
9625 /* This was a GD entry that has been converted to TPREL. If
9626 there happens to be a TPREL entry we can use that one. */
9627 struct got_entry *ent;
9628 for (ent = h->got.glist; ent != NULL; ent = ent->next)
9629 if (ent->got.refcount > 0
9630 && (ent->tls_type & TLS_TPREL) != 0
9631 && ent->addend == gent->addend
9632 && ent->owner == gent->owner)
9633 {
9634 gent->got.refcount = 0;
9635 break;
9636 }
9637
9638 /* If not, then we'll be using our own TPREL entry. */
9639 if (gent->got.refcount != 0)
9640 gent->tls_type = TLS_TLS | TLS_TPREL;
9641 }
9642
9643 /* Remove any list entry that won't generate a word in the GOT before
9644 we call merge_got_entries. Otherwise we risk merging to empty
9645 entries. */
9646 pgent = &h->got.glist;
9647 while ((gent = *pgent) != NULL)
9648 if (gent->got.refcount > 0)
9649 {
9650 if ((gent->tls_type & TLS_LD) != 0
9651 && !h->def_dynamic)
9652 {
9653 ppc64_tlsld_got (gent->owner)->got.refcount += 1;
9654 *pgent = gent->next;
9655 }
9656 else
9657 pgent = &gent->next;
9658 }
9659 else
9660 *pgent = gent->next;
9661
9662 if (!htab->do_multi_toc)
9663 merge_got_entries (&h->got.glist);
9664
9665 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9666 if (!gent->is_indirect)
9667 {
9668 /* Make sure this symbol is output as a dynamic symbol. */
9669 if (!ensure_undef_dynamic (info, h))
9670 return FALSE;
9671
9672 if (!is_ppc64_elf (gent->owner))
9673 abort ();
9674
9675 allocate_got (h, info, gent);
9676 }
9677
9678 /* If no dynamic sections we can't have dynamic relocs, except for
9679 IFUNCs which are handled even in static executables. */
9680 if (!htab->elf.dynamic_sections_created
9681 && h->type != STT_GNU_IFUNC)
9682 eh->dyn_relocs = NULL;
9683
9684 /* Discard relocs on undefined symbols that must be local. */
9685 else if (h->root.type == bfd_link_hash_undefined
9686 && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
9687 eh->dyn_relocs = NULL;
9688
9689 /* Also discard relocs on undefined weak syms with non-default
9690 visibility, or when dynamic_undefined_weak says so. */
9691 else if (UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
9692 eh->dyn_relocs = NULL;
9693
9694 if (eh->dyn_relocs != NULL)
9695 {
9696 struct elf_dyn_relocs *p, **pp;
9697
9698 /* In the shared -Bsymbolic case, discard space allocated for
9699 dynamic pc-relative relocs against symbols which turn out to
9700 be defined in regular objects. For the normal shared case,
9701 discard space for relocs that have become local due to symbol
9702 visibility changes. */
9703
9704 if (bfd_link_pic (info))
9705 {
9706 /* Relocs that use pc_count are those that appear on a call
9707 insn, or certain REL relocs (see must_be_dyn_reloc) that
9708 can be generated via assembly. We want calls to
9709 protected symbols to resolve directly to the function
9710 rather than going via the plt. If people want function
9711 pointer comparisons to work as expected then they should
9712 avoid writing weird assembly. */
9713 if (SYMBOL_CALLS_LOCAL (info, h))
9714 {
9715 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
9716 {
9717 p->count -= p->pc_count;
9718 p->pc_count = 0;
9719 if (p->count == 0)
9720 *pp = p->next;
9721 else
9722 pp = &p->next;
9723 }
9724 }
9725
9726 if (eh->dyn_relocs != NULL)
9727 {
9728 /* Make sure this symbol is output as a dynamic symbol. */
9729 if (!ensure_undef_dynamic (info, h))
9730 return FALSE;
9731 }
9732 }
9733 else if (ELIMINATE_COPY_RELOCS && h->type != STT_GNU_IFUNC)
9734 {
9735 /* For the non-pic case, discard space for relocs against
9736 symbols which turn out to need copy relocs or are not
9737 dynamic. */
9738 if (h->dynamic_adjusted
9739 && !h->def_regular
9740 && !ELF_COMMON_DEF_P (h))
9741 {
9742 /* Make sure this symbol is output as a dynamic symbol. */
9743 if (!ensure_undef_dynamic (info, h))
9744 return FALSE;
9745
9746 if (h->dynindx == -1)
9747 eh->dyn_relocs = NULL;
9748 }
9749 else
9750 eh->dyn_relocs = NULL;
9751 }
9752
9753 /* Finally, allocate space. */
9754 for (p = eh->dyn_relocs; p != NULL; p = p->next)
9755 {
9756 asection *sreloc = elf_section_data (p->sec)->sreloc;
9757 if (eh->elf.type == STT_GNU_IFUNC)
9758 sreloc = htab->elf.irelplt;
9759 sreloc->size += p->count * sizeof (Elf64_External_Rela);
9760 }
9761 }
9762
9763 if ((htab->elf.dynamic_sections_created
9764 && h->dynindx != -1)
9765 || h->type == STT_GNU_IFUNC)
9766 {
9767 struct plt_entry *pent;
9768 bfd_boolean doneone = FALSE;
9769 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
9770 if (pent->plt.refcount > 0)
9771 {
9772 if (!htab->elf.dynamic_sections_created
9773 || h->dynindx == -1)
9774 {
9775 s = htab->elf.iplt;
9776 pent->plt.offset = s->size;
9777 s->size += PLT_ENTRY_SIZE (htab);
9778 s = htab->elf.irelplt;
9779 }
9780 else
9781 {
9782 /* If this is the first .plt entry, make room for the special
9783 first entry. */
9784 s = htab->elf.splt;
9785 if (s->size == 0)
9786 s->size += PLT_INITIAL_ENTRY_SIZE (htab);
9787
9788 pent->plt.offset = s->size;
9789
9790 /* Make room for this entry. */
9791 s->size += PLT_ENTRY_SIZE (htab);
9792
9793 /* Make room for the .glink code. */
9794 s = htab->glink;
9795 if (s->size == 0)
9796 s->size += GLINK_CALL_STUB_SIZE;
9797 if (htab->opd_abi)
9798 {
9799 /* We need bigger stubs past index 32767. */
9800 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
9801 s->size += 4;
9802 s->size += 2*4;
9803 }
9804 else
9805 s->size += 4;
9806
9807 /* We also need to make an entry in the .rela.plt section. */
9808 s = htab->elf.srelplt;
9809 }
9810 s->size += sizeof (Elf64_External_Rela);
9811 doneone = TRUE;
9812 }
9813 else
9814 pent->plt.offset = (bfd_vma) -1;
9815 if (!doneone)
9816 {
9817 h->plt.plist = NULL;
9818 h->needs_plt = 0;
9819 }
9820 }
9821 else
9822 {
9823 h->plt.plist = NULL;
9824 h->needs_plt = 0;
9825 }
9826
9827 return TRUE;
9828 }
9829
9830 /* Called via elf_link_hash_traverse from ppc64_elf_size_dynamic_sections
9831 to set up space for global entry stubs. These are put in glink,
9832 after the branch table. */
9833
9834 static bfd_boolean
9835 size_global_entry_stubs (struct elf_link_hash_entry *h, void *inf)
9836 {
9837 struct bfd_link_info *info;
9838 struct ppc_link_hash_table *htab;
9839 struct plt_entry *pent;
9840 asection *s;
9841
9842 if (h->root.type == bfd_link_hash_indirect)
9843 return TRUE;
9844
9845 if (!h->pointer_equality_needed)
9846 return TRUE;
9847
9848 if (h->def_regular)
9849 return TRUE;
9850
9851 info = inf;
9852 htab = ppc_hash_table (info);
9853 if (htab == NULL)
9854 return FALSE;
9855
9856 s = htab->glink;
9857 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
9858 if (pent->plt.offset != (bfd_vma) -1
9859 && pent->addend == 0)
9860 {
9861 /* For ELFv2, if this symbol is not defined in a regular file
9862 and we are not generating a shared library or pie, then we
9863 need to define the symbol in the executable on a call stub.
9864 This is to avoid text relocations. */
9865 s->size = (s->size + 15) & -16;
9866 h->root.type = bfd_link_hash_defined;
9867 h->root.u.def.section = s;
9868 h->root.u.def.value = s->size;
9869 s->size += 16;
9870 break;
9871 }
9872 return TRUE;
9873 }
9874
9875 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
9876 read-only sections. */
9877
9878 static bfd_boolean
9879 maybe_set_textrel (struct elf_link_hash_entry *h, void *inf)
9880 {
9881 asection *sec;
9882
9883 if (h->root.type == bfd_link_hash_indirect)
9884 return TRUE;
9885
9886 sec = readonly_dynrelocs (h);
9887 if (sec != NULL)
9888 {
9889 struct bfd_link_info *info = (struct bfd_link_info *) inf;
9890
9891 info->flags |= DF_TEXTREL;
9892 info->callbacks->minfo
9893 (_("%B: dynamic relocation against `%T' in read-only section `%A'\n"),
9894 sec->owner, h->root.root.string, sec);
9895
9896 /* Not an error, just cut short the traversal. */
9897 return FALSE;
9898 }
9899 return TRUE;
9900 }
9901
9902 /* Set the sizes of the dynamic sections. */
9903
9904 static bfd_boolean
9905 ppc64_elf_size_dynamic_sections (bfd *output_bfd,
9906 struct bfd_link_info *info)
9907 {
9908 struct ppc_link_hash_table *htab;
9909 bfd *dynobj;
9910 asection *s;
9911 bfd_boolean relocs;
9912 bfd *ibfd;
9913 struct got_entry *first_tlsld;
9914
9915 htab = ppc_hash_table (info);
9916 if (htab == NULL)
9917 return FALSE;
9918
9919 dynobj = htab->elf.dynobj;
9920 if (dynobj == NULL)
9921 abort ();
9922
9923 if (htab->elf.dynamic_sections_created)
9924 {
9925 /* Set the contents of the .interp section to the interpreter. */
9926 if (bfd_link_executable (info) && !info->nointerp)
9927 {
9928 s = bfd_get_linker_section (dynobj, ".interp");
9929 if (s == NULL)
9930 abort ();
9931 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
9932 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
9933 }
9934 }
9935
9936 /* Set up .got offsets for local syms, and space for local dynamic
9937 relocs. */
9938 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
9939 {
9940 struct got_entry **lgot_ents;
9941 struct got_entry **end_lgot_ents;
9942 struct plt_entry **local_plt;
9943 struct plt_entry **end_local_plt;
9944 unsigned char *lgot_masks;
9945 bfd_size_type locsymcount;
9946 Elf_Internal_Shdr *symtab_hdr;
9947
9948 if (!is_ppc64_elf (ibfd))
9949 continue;
9950
9951 for (s = ibfd->sections; s != NULL; s = s->next)
9952 {
9953 struct ppc_dyn_relocs *p;
9954
9955 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
9956 {
9957 if (!bfd_is_abs_section (p->sec)
9958 && bfd_is_abs_section (p->sec->output_section))
9959 {
9960 /* Input section has been discarded, either because
9961 it is a copy of a linkonce section or due to
9962 linker script /DISCARD/, so we'll be discarding
9963 the relocs too. */
9964 }
9965 else if (p->count != 0)
9966 {
9967 asection *srel = elf_section_data (p->sec)->sreloc;
9968 if (p->ifunc)
9969 srel = htab->elf.irelplt;
9970 srel->size += p->count * sizeof (Elf64_External_Rela);
9971 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
9972 info->flags |= DF_TEXTREL;
9973 }
9974 }
9975 }
9976
9977 lgot_ents = elf_local_got_ents (ibfd);
9978 if (!lgot_ents)
9979 continue;
9980
9981 symtab_hdr = &elf_symtab_hdr (ibfd);
9982 locsymcount = symtab_hdr->sh_info;
9983 end_lgot_ents = lgot_ents + locsymcount;
9984 local_plt = (struct plt_entry **) end_lgot_ents;
9985 end_local_plt = local_plt + locsymcount;
9986 lgot_masks = (unsigned char *) end_local_plt;
9987 s = ppc64_elf_tdata (ibfd)->got;
9988 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
9989 {
9990 struct got_entry **pent, *ent;
9991
9992 pent = lgot_ents;
9993 while ((ent = *pent) != NULL)
9994 if (ent->got.refcount > 0)
9995 {
9996 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
9997 {
9998 ppc64_tlsld_got (ibfd)->got.refcount += 1;
9999 *pent = ent->next;
10000 }
10001 else
10002 {
10003 unsigned int ent_size = 8;
10004 unsigned int rel_size = sizeof (Elf64_External_Rela);
10005
10006 ent->got.offset = s->size;
10007 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
10008 {
10009 ent_size *= 2;
10010 rel_size *= 2;
10011 }
10012 s->size += ent_size;
10013 if ((*lgot_masks & PLT_IFUNC) != 0)
10014 {
10015 htab->elf.irelplt->size += rel_size;
10016 htab->got_reli_size += rel_size;
10017 }
10018 else if (bfd_link_pic (info)
10019 && !((ent->tls_type & TLS_TPREL) != 0
10020 && bfd_link_executable (info)))
10021 {
10022 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
10023 srel->size += rel_size;
10024 }
10025 pent = &ent->next;
10026 }
10027 }
10028 else
10029 *pent = ent->next;
10030 }
10031
10032 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
10033 for (; local_plt < end_local_plt; ++local_plt)
10034 {
10035 struct plt_entry *ent;
10036
10037 for (ent = *local_plt; ent != NULL; ent = ent->next)
10038 if (ent->plt.refcount > 0)
10039 {
10040 s = htab->elf.iplt;
10041 ent->plt.offset = s->size;
10042 s->size += PLT_ENTRY_SIZE (htab);
10043
10044 htab->elf.irelplt->size += sizeof (Elf64_External_Rela);
10045 }
10046 else
10047 ent->plt.offset = (bfd_vma) -1;
10048 }
10049 }
10050
10051 /* Allocate global sym .plt and .got entries, and space for global
10052 sym dynamic relocs. */
10053 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
10054 /* Stash the end of glink branch table. */
10055 if (htab->glink != NULL)
10056 htab->glink->rawsize = htab->glink->size;
10057
10058 if (!htab->opd_abi && !bfd_link_pic (info))
10059 elf_link_hash_traverse (&htab->elf, size_global_entry_stubs, info);
10060
10061 first_tlsld = NULL;
10062 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
10063 {
10064 struct got_entry *ent;
10065
10066 if (!is_ppc64_elf (ibfd))
10067 continue;
10068
10069 ent = ppc64_tlsld_got (ibfd);
10070 if (ent->got.refcount > 0)
10071 {
10072 if (!htab->do_multi_toc && first_tlsld != NULL)
10073 {
10074 ent->is_indirect = TRUE;
10075 ent->got.ent = first_tlsld;
10076 }
10077 else
10078 {
10079 if (first_tlsld == NULL)
10080 first_tlsld = ent;
10081 s = ppc64_elf_tdata (ibfd)->got;
10082 ent->got.offset = s->size;
10083 ent->owner = ibfd;
10084 s->size += 16;
10085 if (bfd_link_pic (info))
10086 {
10087 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
10088 srel->size += sizeof (Elf64_External_Rela);
10089 }
10090 }
10091 }
10092 else
10093 ent->got.offset = (bfd_vma) -1;
10094 }
10095
10096 /* We now have determined the sizes of the various dynamic sections.
10097 Allocate memory for them. */
10098 relocs = FALSE;
10099 for (s = dynobj->sections; s != NULL; s = s->next)
10100 {
10101 if ((s->flags & SEC_LINKER_CREATED) == 0)
10102 continue;
10103
10104 if (s == htab->brlt || s == htab->relbrlt)
10105 /* These haven't been allocated yet; don't strip. */
10106 continue;
10107 else if (s == htab->elf.sgot
10108 || s == htab->elf.splt
10109 || s == htab->elf.iplt
10110 || s == htab->glink
10111 || s == htab->elf.sdynbss
10112 || s == htab->elf.sdynrelro)
10113 {
10114 /* Strip this section if we don't need it; see the
10115 comment below. */
10116 }
10117 else if (s == htab->glink_eh_frame)
10118 {
10119 if (!bfd_is_abs_section (s->output_section))
10120 /* Not sized yet. */
10121 continue;
10122 }
10123 else if (CONST_STRNEQ (s->name, ".rela"))
10124 {
10125 if (s->size != 0)
10126 {
10127 if (s != htab->elf.srelplt)
10128 relocs = TRUE;
10129
10130 /* We use the reloc_count field as a counter if we need
10131 to copy relocs into the output file. */
10132 s->reloc_count = 0;
10133 }
10134 }
10135 else
10136 {
10137 /* It's not one of our sections, so don't allocate space. */
10138 continue;
10139 }
10140
10141 if (s->size == 0)
10142 {
10143 /* If we don't need this section, strip it from the
10144 output file. This is mostly to handle .rela.bss and
10145 .rela.plt. We must create both sections in
10146 create_dynamic_sections, because they must be created
10147 before the linker maps input sections to output
10148 sections. The linker does that before
10149 adjust_dynamic_symbol is called, and it is that
10150 function which decides whether anything needs to go
10151 into these sections. */
10152 s->flags |= SEC_EXCLUDE;
10153 continue;
10154 }
10155
10156 if (bfd_is_abs_section (s->output_section))
10157 _bfd_error_handler (_("warning: discarding dynamic section %s"),
10158 s->name);
10159
10160 if ((s->flags & SEC_HAS_CONTENTS) == 0)
10161 continue;
10162
10163 /* Allocate memory for the section contents. We use bfd_zalloc
10164 here in case unused entries are not reclaimed before the
10165 section's contents are written out. This should not happen,
10166 but this way if it does we get a R_PPC64_NONE reloc in .rela
10167 sections instead of garbage.
10168 We also rely on the section contents being zero when writing
10169 the GOT and .dynrelro. */
10170 s->contents = bfd_zalloc (dynobj, s->size);
10171 if (s->contents == NULL)
10172 return FALSE;
10173 }
10174
10175 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
10176 {
10177 if (!is_ppc64_elf (ibfd))
10178 continue;
10179
10180 s = ppc64_elf_tdata (ibfd)->got;
10181 if (s != NULL && s != htab->elf.sgot)
10182 {
10183 if (s->size == 0)
10184 s->flags |= SEC_EXCLUDE;
10185 else
10186 {
10187 s->contents = bfd_zalloc (ibfd, s->size);
10188 if (s->contents == NULL)
10189 return FALSE;
10190 }
10191 }
10192 s = ppc64_elf_tdata (ibfd)->relgot;
10193 if (s != NULL)
10194 {
10195 if (s->size == 0)
10196 s->flags |= SEC_EXCLUDE;
10197 else
10198 {
10199 s->contents = bfd_zalloc (ibfd, s->size);
10200 if (s->contents == NULL)
10201 return FALSE;
10202 relocs = TRUE;
10203 s->reloc_count = 0;
10204 }
10205 }
10206 }
10207
10208 if (htab->elf.dynamic_sections_created)
10209 {
10210 bfd_boolean tls_opt;
10211
10212 /* Add some entries to the .dynamic section. We fill in the
10213 values later, in ppc64_elf_finish_dynamic_sections, but we
10214 must add the entries now so that we get the correct size for
10215 the .dynamic section. The DT_DEBUG entry is filled in by the
10216 dynamic linker and used by the debugger. */
10217 #define add_dynamic_entry(TAG, VAL) \
10218 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
10219
10220 if (bfd_link_executable (info))
10221 {
10222 if (!add_dynamic_entry (DT_DEBUG, 0))
10223 return FALSE;
10224 }
10225
10226 if (htab->elf.splt != NULL && htab->elf.splt->size != 0)
10227 {
10228 if (!add_dynamic_entry (DT_PLTGOT, 0)
10229 || !add_dynamic_entry (DT_PLTRELSZ, 0)
10230 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
10231 || !add_dynamic_entry (DT_JMPREL, 0)
10232 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
10233 return FALSE;
10234 }
10235
10236 if (NO_OPD_RELOCS && abiversion (output_bfd) <= 1)
10237 {
10238 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
10239 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
10240 return FALSE;
10241 }
10242
10243 tls_opt = (htab->params->tls_get_addr_opt
10244 && htab->tls_get_addr_fd != NULL
10245 && htab->tls_get_addr_fd->elf.plt.plist != NULL);
10246 if (tls_opt || !htab->opd_abi)
10247 {
10248 if (!add_dynamic_entry (DT_PPC64_OPT, tls_opt ? PPC64_OPT_TLS : 0))
10249 return FALSE;
10250 }
10251
10252 if (relocs)
10253 {
10254 if (!add_dynamic_entry (DT_RELA, 0)
10255 || !add_dynamic_entry (DT_RELASZ, 0)
10256 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
10257 return FALSE;
10258
10259 /* If any dynamic relocs apply to a read-only section,
10260 then we need a DT_TEXTREL entry. */
10261 if ((info->flags & DF_TEXTREL) == 0)
10262 elf_link_hash_traverse (&htab->elf, maybe_set_textrel, info);
10263
10264 if ((info->flags & DF_TEXTREL) != 0)
10265 {
10266 if (!add_dynamic_entry (DT_TEXTREL, 0))
10267 return FALSE;
10268 }
10269 }
10270 }
10271 #undef add_dynamic_entry
10272
10273 return TRUE;
10274 }
10275
10276 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
10277
10278 static bfd_boolean
10279 ppc64_elf_hash_symbol (struct elf_link_hash_entry *h)
10280 {
10281 if (h->plt.plist != NULL
10282 && !h->def_regular
10283 && !h->pointer_equality_needed)
10284 return FALSE;
10285
10286 return _bfd_elf_hash_symbol (h);
10287 }
10288
10289 /* Determine the type of stub needed, if any, for a call. */
10290
10291 static inline enum ppc_stub_type
10292 ppc_type_of_stub (asection *input_sec,
10293 const Elf_Internal_Rela *rel,
10294 struct ppc_link_hash_entry **hash,
10295 struct plt_entry **plt_ent,
10296 bfd_vma destination,
10297 unsigned long local_off)
10298 {
10299 struct ppc_link_hash_entry *h = *hash;
10300 bfd_vma location;
10301 bfd_vma branch_offset;
10302 bfd_vma max_branch_offset;
10303 enum elf_ppc64_reloc_type r_type;
10304
10305 if (h != NULL)
10306 {
10307 struct plt_entry *ent;
10308 struct ppc_link_hash_entry *fdh = h;
10309 if (h->oh != NULL
10310 && h->oh->is_func_descriptor)
10311 {
10312 fdh = ppc_follow_link (h->oh);
10313 *hash = fdh;
10314 }
10315
10316 for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next)
10317 if (ent->addend == rel->r_addend
10318 && ent->plt.offset != (bfd_vma) -1)
10319 {
10320 *plt_ent = ent;
10321 return ppc_stub_plt_call;
10322 }
10323
10324 /* Here, we know we don't have a plt entry. If we don't have a
10325 either a defined function descriptor or a defined entry symbol
10326 in a regular object file, then it is pointless trying to make
10327 any other type of stub. */
10328 if (!is_static_defined (&fdh->elf)
10329 && !is_static_defined (&h->elf))
10330 return ppc_stub_none;
10331 }
10332 else if (elf_local_got_ents (input_sec->owner) != NULL)
10333 {
10334 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (input_sec->owner);
10335 struct plt_entry **local_plt = (struct plt_entry **)
10336 elf_local_got_ents (input_sec->owner) + symtab_hdr->sh_info;
10337 unsigned long r_symndx = ELF64_R_SYM (rel->r_info);
10338
10339 if (local_plt[r_symndx] != NULL)
10340 {
10341 struct plt_entry *ent;
10342
10343 for (ent = local_plt[r_symndx]; ent != NULL; ent = ent->next)
10344 if (ent->addend == rel->r_addend
10345 && ent->plt.offset != (bfd_vma) -1)
10346 {
10347 *plt_ent = ent;
10348 return ppc_stub_plt_call;
10349 }
10350 }
10351 }
10352
10353 /* Determine where the call point is. */
10354 location = (input_sec->output_offset
10355 + input_sec->output_section->vma
10356 + rel->r_offset);
10357
10358 branch_offset = destination - location;
10359 r_type = ELF64_R_TYPE (rel->r_info);
10360
10361 /* Determine if a long branch stub is needed. */
10362 max_branch_offset = 1 << 25;
10363 if (r_type != R_PPC64_REL24)
10364 max_branch_offset = 1 << 15;
10365
10366 if (branch_offset + max_branch_offset >= 2 * max_branch_offset - local_off)
10367 /* We need a stub. Figure out whether a long_branch or plt_branch
10368 is needed later. */
10369 return ppc_stub_long_branch;
10370
10371 return ppc_stub_none;
10372 }
10373
10374 /* With power7 weakly ordered memory model, it is possible for ld.so
10375 to update a plt entry in one thread and have another thread see a
10376 stale zero toc entry. To avoid this we need some sort of acquire
10377 barrier in the call stub. One solution is to make the load of the
10378 toc word seem to appear to depend on the load of the function entry
10379 word. Another solution is to test for r2 being zero, and branch to
10380 the appropriate glink entry if so.
10381
10382 . fake dep barrier compare
10383 . ld 12,xxx(2) ld 12,xxx(2)
10384 . mtctr 12 mtctr 12
10385 . xor 11,12,12 ld 2,xxx+8(2)
10386 . add 2,2,11 cmpldi 2,0
10387 . ld 2,xxx+8(2) bnectr+
10388 . bctr b <glink_entry>
10389
10390 The solution involving the compare turns out to be faster, so
10391 that's what we use unless the branch won't reach. */
10392
10393 #define ALWAYS_USE_FAKE_DEP 0
10394 #define ALWAYS_EMIT_R2SAVE 0
10395
10396 #define PPC_LO(v) ((v) & 0xffff)
10397 #define PPC_HI(v) (((v) >> 16) & 0xffff)
10398 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
10399
10400 static inline unsigned int
10401 plt_stub_size (struct ppc_link_hash_table *htab,
10402 struct ppc_stub_hash_entry *stub_entry,
10403 bfd_vma off)
10404 {
10405 unsigned size = 12;
10406
10407 if (ALWAYS_EMIT_R2SAVE
10408 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10409 size += 4;
10410 if (PPC_HA (off) != 0)
10411 size += 4;
10412 if (htab->opd_abi)
10413 {
10414 size += 4;
10415 if (htab->params->plt_static_chain)
10416 size += 4;
10417 if (htab->params->plt_thread_safe
10418 && htab->elf.dynamic_sections_created
10419 && stub_entry->h != NULL
10420 && stub_entry->h->elf.dynindx != -1)
10421 size += 8;
10422 if (PPC_HA (off + 8 + 8 * htab->params->plt_static_chain) != PPC_HA (off))
10423 size += 4;
10424 }
10425 if (stub_entry->h != NULL
10426 && (stub_entry->h == htab->tls_get_addr_fd
10427 || stub_entry->h == htab->tls_get_addr)
10428 && htab->params->tls_get_addr_opt)
10429 {
10430 size += 7 * 4;
10431 if (ALWAYS_EMIT_R2SAVE
10432 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10433 size += 6 * 4;
10434 }
10435 return size;
10436 }
10437
10438 /* Depending on the sign of plt_stub_align:
10439 If positive, return the padding to align to a 2**plt_stub_align
10440 boundary.
10441 If negative, if this stub would cross fewer 2**plt_stub_align
10442 boundaries if we align, then return the padding needed to do so. */
10443
10444 static inline unsigned int
10445 plt_stub_pad (struct ppc_link_hash_table *htab,
10446 struct ppc_stub_hash_entry *stub_entry,
10447 bfd_vma plt_off)
10448 {
10449 int stub_align;
10450 unsigned stub_size = plt_stub_size (htab, stub_entry, plt_off);
10451 bfd_vma stub_off = stub_entry->group->stub_sec->size;
10452
10453 if (htab->params->plt_stub_align >= 0)
10454 {
10455 stub_align = 1 << htab->params->plt_stub_align;
10456 if ((stub_off & (stub_align - 1)) != 0)
10457 return stub_align - (stub_off & (stub_align - 1));
10458 return 0;
10459 }
10460
10461 stub_align = 1 << -htab->params->plt_stub_align;
10462 if (((stub_off + stub_size - 1) & -stub_align) - (stub_off & -stub_align)
10463 > ((stub_size - 1) & -stub_align))
10464 return stub_align - (stub_off & (stub_align - 1));
10465 return 0;
10466 }
10467
10468 /* Build a .plt call stub. */
10469
10470 static inline bfd_byte *
10471 build_plt_stub (struct ppc_link_hash_table *htab,
10472 struct ppc_stub_hash_entry *stub_entry,
10473 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
10474 {
10475 bfd *obfd = htab->params->stub_bfd;
10476 bfd_boolean plt_load_toc = htab->opd_abi;
10477 bfd_boolean plt_static_chain = htab->params->plt_static_chain;
10478 bfd_boolean plt_thread_safe = (htab->params->plt_thread_safe
10479 && htab->elf.dynamic_sections_created
10480 && stub_entry->h != NULL
10481 && stub_entry->h->elf.dynindx != -1);
10482 bfd_boolean use_fake_dep = plt_thread_safe;
10483 bfd_vma cmp_branch_off = 0;
10484
10485 if (!ALWAYS_USE_FAKE_DEP
10486 && plt_load_toc
10487 && plt_thread_safe
10488 && !((stub_entry->h == htab->tls_get_addr_fd
10489 || stub_entry->h == htab->tls_get_addr)
10490 && htab->params->tls_get_addr_opt))
10491 {
10492 bfd_vma pltoff = stub_entry->plt_ent->plt.offset & ~1;
10493 bfd_vma pltindex = ((pltoff - PLT_INITIAL_ENTRY_SIZE (htab))
10494 / PLT_ENTRY_SIZE (htab));
10495 bfd_vma glinkoff = GLINK_CALL_STUB_SIZE + pltindex * 8;
10496 bfd_vma to, from;
10497
10498 if (pltindex > 32768)
10499 glinkoff += (pltindex - 32768) * 4;
10500 to = (glinkoff
10501 + htab->glink->output_offset
10502 + htab->glink->output_section->vma);
10503 from = (p - stub_entry->group->stub_sec->contents
10504 + 4 * (ALWAYS_EMIT_R2SAVE
10505 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10506 + 4 * (PPC_HA (offset) != 0)
10507 + 4 * (PPC_HA (offset + 8 + 8 * plt_static_chain)
10508 != PPC_HA (offset))
10509 + 4 * (plt_static_chain != 0)
10510 + 20
10511 + stub_entry->group->stub_sec->output_offset
10512 + stub_entry->group->stub_sec->output_section->vma);
10513 cmp_branch_off = to - from;
10514 use_fake_dep = cmp_branch_off + (1 << 25) >= (1 << 26);
10515 }
10516
10517 if (PPC_HA (offset) != 0)
10518 {
10519 if (r != NULL)
10520 {
10521 if (ALWAYS_EMIT_R2SAVE
10522 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10523 r[0].r_offset += 4;
10524 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
10525 r[1].r_offset = r[0].r_offset + 4;
10526 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10527 r[1].r_addend = r[0].r_addend;
10528 if (plt_load_toc)
10529 {
10530 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10531 {
10532 r[2].r_offset = r[1].r_offset + 4;
10533 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO);
10534 r[2].r_addend = r[0].r_addend;
10535 }
10536 else
10537 {
10538 r[2].r_offset = r[1].r_offset + 8 + 8 * use_fake_dep;
10539 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10540 r[2].r_addend = r[0].r_addend + 8;
10541 if (plt_static_chain)
10542 {
10543 r[3].r_offset = r[2].r_offset + 4;
10544 r[3].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10545 r[3].r_addend = r[0].r_addend + 16;
10546 }
10547 }
10548 }
10549 }
10550 if (ALWAYS_EMIT_R2SAVE
10551 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10552 bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p), p += 4;
10553 if (plt_load_toc)
10554 {
10555 bfd_put_32 (obfd, ADDIS_R11_R2 | PPC_HA (offset), p), p += 4;
10556 bfd_put_32 (obfd, LD_R12_0R11 | PPC_LO (offset), p), p += 4;
10557 }
10558 else
10559 {
10560 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
10561 bfd_put_32 (obfd, LD_R12_0R12 | PPC_LO (offset), p), p += 4;
10562 }
10563 if (plt_load_toc
10564 && PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10565 {
10566 bfd_put_32 (obfd, ADDI_R11_R11 | PPC_LO (offset), p), p += 4;
10567 offset = 0;
10568 }
10569 bfd_put_32 (obfd, MTCTR_R12, p), p += 4;
10570 if (plt_load_toc)
10571 {
10572 if (use_fake_dep)
10573 {
10574 bfd_put_32 (obfd, XOR_R2_R12_R12, p), p += 4;
10575 bfd_put_32 (obfd, ADD_R11_R11_R2, p), p += 4;
10576 }
10577 bfd_put_32 (obfd, LD_R2_0R11 | PPC_LO (offset + 8), p), p += 4;
10578 if (plt_static_chain)
10579 bfd_put_32 (obfd, LD_R11_0R11 | PPC_LO (offset + 16), p), p += 4;
10580 }
10581 }
10582 else
10583 {
10584 if (r != NULL)
10585 {
10586 if (ALWAYS_EMIT_R2SAVE
10587 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10588 r[0].r_offset += 4;
10589 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10590 if (plt_load_toc)
10591 {
10592 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10593 {
10594 r[1].r_offset = r[0].r_offset + 4;
10595 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16);
10596 r[1].r_addend = r[0].r_addend;
10597 }
10598 else
10599 {
10600 r[1].r_offset = r[0].r_offset + 8 + 8 * use_fake_dep;
10601 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10602 r[1].r_addend = r[0].r_addend + 8 + 8 * plt_static_chain;
10603 if (plt_static_chain)
10604 {
10605 r[2].r_offset = r[1].r_offset + 4;
10606 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10607 r[2].r_addend = r[0].r_addend + 8;
10608 }
10609 }
10610 }
10611 }
10612 if (ALWAYS_EMIT_R2SAVE
10613 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10614 bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p), p += 4;
10615 bfd_put_32 (obfd, LD_R12_0R2 | PPC_LO (offset), p), p += 4;
10616 if (plt_load_toc
10617 && PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10618 {
10619 bfd_put_32 (obfd, ADDI_R2_R2 | PPC_LO (offset), p), p += 4;
10620 offset = 0;
10621 }
10622 bfd_put_32 (obfd, MTCTR_R12, p), p += 4;
10623 if (plt_load_toc)
10624 {
10625 if (use_fake_dep)
10626 {
10627 bfd_put_32 (obfd, XOR_R11_R12_R12, p), p += 4;
10628 bfd_put_32 (obfd, ADD_R2_R2_R11, p), p += 4;
10629 }
10630 if (plt_static_chain)
10631 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset + 16), p), p += 4;
10632 bfd_put_32 (obfd, LD_R2_0R2 | PPC_LO (offset + 8), p), p += 4;
10633 }
10634 }
10635 if (plt_load_toc && plt_thread_safe && !use_fake_dep)
10636 {
10637 bfd_put_32 (obfd, CMPLDI_R2_0, p), p += 4;
10638 bfd_put_32 (obfd, BNECTR_P4, p), p += 4;
10639 bfd_put_32 (obfd, B_DOT | (cmp_branch_off & 0x3fffffc), p), p += 4;
10640 }
10641 else
10642 bfd_put_32 (obfd, BCTR, p), p += 4;
10643 return p;
10644 }
10645
10646 /* Build a special .plt call stub for __tls_get_addr. */
10647
10648 #define LD_R11_0R3 0xe9630000
10649 #define LD_R12_0R3 0xe9830000
10650 #define MR_R0_R3 0x7c601b78
10651 #define CMPDI_R11_0 0x2c2b0000
10652 #define ADD_R3_R12_R13 0x7c6c6a14
10653 #define BEQLR 0x4d820020
10654 #define MR_R3_R0 0x7c030378
10655 #define STD_R11_0R1 0xf9610000
10656 #define BCTRL 0x4e800421
10657 #define LD_R11_0R1 0xe9610000
10658 #define MTLR_R11 0x7d6803a6
10659
10660 static inline bfd_byte *
10661 build_tls_get_addr_stub (struct ppc_link_hash_table *htab,
10662 struct ppc_stub_hash_entry *stub_entry,
10663 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
10664 {
10665 bfd *obfd = htab->params->stub_bfd;
10666
10667 bfd_put_32 (obfd, LD_R11_0R3 + 0, p), p += 4;
10668 bfd_put_32 (obfd, LD_R12_0R3 + 8, p), p += 4;
10669 bfd_put_32 (obfd, MR_R0_R3, p), p += 4;
10670 bfd_put_32 (obfd, CMPDI_R11_0, p), p += 4;
10671 bfd_put_32 (obfd, ADD_R3_R12_R13, p), p += 4;
10672 bfd_put_32 (obfd, BEQLR, p), p += 4;
10673 bfd_put_32 (obfd, MR_R3_R0, p), p += 4;
10674 if (r != NULL)
10675 r[0].r_offset += 7 * 4;
10676 if (!ALWAYS_EMIT_R2SAVE
10677 && stub_entry->stub_type != ppc_stub_plt_call_r2save)
10678 return build_plt_stub (htab, stub_entry, p, offset, r);
10679
10680 bfd_put_32 (obfd, MFLR_R11, p), p += 4;
10681 bfd_put_32 (obfd, STD_R11_0R1 + STK_LINKER (htab), p), p += 4;
10682
10683 if (r != NULL)
10684 r[0].r_offset += 2 * 4;
10685 p = build_plt_stub (htab, stub_entry, p, offset, r);
10686 bfd_put_32 (obfd, BCTRL, p - 4);
10687
10688 bfd_put_32 (obfd, LD_R2_0R1 + STK_TOC (htab), p), p += 4;
10689 bfd_put_32 (obfd, LD_R11_0R1 + STK_LINKER (htab), p), p += 4;
10690 bfd_put_32 (obfd, MTLR_R11, p), p += 4;
10691 bfd_put_32 (obfd, BLR, p), p += 4;
10692
10693 return p;
10694 }
10695
10696 static Elf_Internal_Rela *
10697 get_relocs (asection *sec, int count)
10698 {
10699 Elf_Internal_Rela *relocs;
10700 struct bfd_elf_section_data *elfsec_data;
10701
10702 elfsec_data = elf_section_data (sec);
10703 relocs = elfsec_data->relocs;
10704 if (relocs == NULL)
10705 {
10706 bfd_size_type relsize;
10707 relsize = sec->reloc_count * sizeof (*relocs);
10708 relocs = bfd_alloc (sec->owner, relsize);
10709 if (relocs == NULL)
10710 return NULL;
10711 elfsec_data->relocs = relocs;
10712 elfsec_data->rela.hdr = bfd_zalloc (sec->owner,
10713 sizeof (Elf_Internal_Shdr));
10714 if (elfsec_data->rela.hdr == NULL)
10715 return NULL;
10716 elfsec_data->rela.hdr->sh_size = (sec->reloc_count
10717 * sizeof (Elf64_External_Rela));
10718 elfsec_data->rela.hdr->sh_entsize = sizeof (Elf64_External_Rela);
10719 sec->reloc_count = 0;
10720 }
10721 relocs += sec->reloc_count;
10722 sec->reloc_count += count;
10723 return relocs;
10724 }
10725
10726 static bfd_vma
10727 get_r2off (struct bfd_link_info *info,
10728 struct ppc_stub_hash_entry *stub_entry)
10729 {
10730 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10731 bfd_vma r2off = htab->sec_info[stub_entry->target_section->id].toc_off;
10732
10733 if (r2off == 0)
10734 {
10735 /* Support linking -R objects. Get the toc pointer from the
10736 opd entry. */
10737 char buf[8];
10738 if (!htab->opd_abi)
10739 return r2off;
10740 asection *opd = stub_entry->h->elf.root.u.def.section;
10741 bfd_vma opd_off = stub_entry->h->elf.root.u.def.value;
10742
10743 if (strcmp (opd->name, ".opd") != 0
10744 || opd->reloc_count != 0)
10745 {
10746 info->callbacks->einfo (_("%P: cannot find opd entry toc for `%T'\n"),
10747 stub_entry->h->elf.root.root.string);
10748 bfd_set_error (bfd_error_bad_value);
10749 return (bfd_vma) -1;
10750 }
10751 if (!bfd_get_section_contents (opd->owner, opd, buf, opd_off + 8, 8))
10752 return (bfd_vma) -1;
10753 r2off = bfd_get_64 (opd->owner, buf);
10754 r2off -= elf_gp (info->output_bfd);
10755 }
10756 r2off -= htab->sec_info[stub_entry->group->link_sec->id].toc_off;
10757 return r2off;
10758 }
10759
10760 static bfd_boolean
10761 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
10762 {
10763 struct ppc_stub_hash_entry *stub_entry;
10764 struct ppc_branch_hash_entry *br_entry;
10765 struct bfd_link_info *info;
10766 struct ppc_link_hash_table *htab;
10767 bfd_byte *loc;
10768 bfd_byte *p;
10769 bfd_vma dest, off;
10770 int size;
10771 Elf_Internal_Rela *r;
10772 asection *plt;
10773
10774 /* Massage our args to the form they really have. */
10775 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
10776 info = in_arg;
10777
10778 htab = ppc_hash_table (info);
10779 if (htab == NULL)
10780 return FALSE;
10781
10782 /* Make a note of the offset within the stubs for this entry. */
10783 stub_entry->stub_offset = stub_entry->group->stub_sec->size;
10784 loc = stub_entry->group->stub_sec->contents + stub_entry->stub_offset;
10785
10786 htab->stub_count[stub_entry->stub_type - 1] += 1;
10787 switch (stub_entry->stub_type)
10788 {
10789 case ppc_stub_long_branch:
10790 case ppc_stub_long_branch_r2off:
10791 /* Branches are relative. This is where we are going to. */
10792 dest = (stub_entry->target_value
10793 + stub_entry->target_section->output_offset
10794 + stub_entry->target_section->output_section->vma);
10795 dest += PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
10796 off = dest;
10797
10798 /* And this is where we are coming from. */
10799 off -= (stub_entry->stub_offset
10800 + stub_entry->group->stub_sec->output_offset
10801 + stub_entry->group->stub_sec->output_section->vma);
10802
10803 size = 4;
10804 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
10805 {
10806 bfd_vma r2off = get_r2off (info, stub_entry);
10807
10808 if (r2off == (bfd_vma) -1)
10809 {
10810 htab->stub_error = TRUE;
10811 return FALSE;
10812 }
10813 bfd_put_32 (htab->params->stub_bfd, STD_R2_0R1 + STK_TOC (htab), loc);
10814 loc += 4;
10815 size = 8;
10816 if (PPC_HA (r2off) != 0)
10817 {
10818 bfd_put_32 (htab->params->stub_bfd,
10819 ADDIS_R2_R2 | PPC_HA (r2off), loc);
10820 loc += 4;
10821 size += 4;
10822 }
10823 if (PPC_LO (r2off) != 0)
10824 {
10825 bfd_put_32 (htab->params->stub_bfd,
10826 ADDI_R2_R2 | PPC_LO (r2off), loc);
10827 loc += 4;
10828 size += 4;
10829 }
10830 off -= size - 4;
10831 }
10832 bfd_put_32 (htab->params->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
10833
10834 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
10835 {
10836 info->callbacks->einfo
10837 (_("%P: long branch stub `%s' offset overflow\n"),
10838 stub_entry->root.string);
10839 htab->stub_error = TRUE;
10840 return FALSE;
10841 }
10842
10843 if (info->emitrelocations)
10844 {
10845 r = get_relocs (stub_entry->group->stub_sec, 1);
10846 if (r == NULL)
10847 return FALSE;
10848 r->r_offset = loc - stub_entry->group->stub_sec->contents;
10849 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
10850 r->r_addend = dest;
10851 if (stub_entry->h != NULL)
10852 {
10853 struct elf_link_hash_entry **hashes;
10854 unsigned long symndx;
10855 struct ppc_link_hash_entry *h;
10856
10857 hashes = elf_sym_hashes (htab->params->stub_bfd);
10858 if (hashes == NULL)
10859 {
10860 bfd_size_type hsize;
10861
10862 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
10863 hashes = bfd_zalloc (htab->params->stub_bfd, hsize);
10864 if (hashes == NULL)
10865 return FALSE;
10866 elf_sym_hashes (htab->params->stub_bfd) = hashes;
10867 htab->stub_globals = 1;
10868 }
10869 symndx = htab->stub_globals++;
10870 h = stub_entry->h;
10871 hashes[symndx] = &h->elf;
10872 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
10873 if (h->oh != NULL && h->oh->is_func)
10874 h = ppc_follow_link (h->oh);
10875 if (h->elf.root.u.def.section != stub_entry->target_section)
10876 /* H is an opd symbol. The addend must be zero. */
10877 r->r_addend = 0;
10878 else
10879 {
10880 off = (h->elf.root.u.def.value
10881 + h->elf.root.u.def.section->output_offset
10882 + h->elf.root.u.def.section->output_section->vma);
10883 r->r_addend -= off;
10884 }
10885 }
10886 }
10887 break;
10888
10889 case ppc_stub_plt_branch:
10890 case ppc_stub_plt_branch_r2off:
10891 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
10892 stub_entry->root.string + 9,
10893 FALSE, FALSE);
10894 if (br_entry == NULL)
10895 {
10896 info->callbacks->einfo (_("%P: can't find branch stub `%s'\n"),
10897 stub_entry->root.string);
10898 htab->stub_error = TRUE;
10899 return FALSE;
10900 }
10901
10902 dest = (stub_entry->target_value
10903 + stub_entry->target_section->output_offset
10904 + stub_entry->target_section->output_section->vma);
10905 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
10906 dest += PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
10907
10908 bfd_put_64 (htab->brlt->owner, dest,
10909 htab->brlt->contents + br_entry->offset);
10910
10911 if (br_entry->iter == htab->stub_iteration)
10912 {
10913 br_entry->iter = 0;
10914
10915 if (htab->relbrlt != NULL)
10916 {
10917 /* Create a reloc for the branch lookup table entry. */
10918 Elf_Internal_Rela rela;
10919 bfd_byte *rl;
10920
10921 rela.r_offset = (br_entry->offset
10922 + htab->brlt->output_offset
10923 + htab->brlt->output_section->vma);
10924 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
10925 rela.r_addend = dest;
10926
10927 rl = htab->relbrlt->contents;
10928 rl += (htab->relbrlt->reloc_count++
10929 * sizeof (Elf64_External_Rela));
10930 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
10931 }
10932 else if (info->emitrelocations)
10933 {
10934 r = get_relocs (htab->brlt, 1);
10935 if (r == NULL)
10936 return FALSE;
10937 /* brlt, being SEC_LINKER_CREATED does not go through the
10938 normal reloc processing. Symbols and offsets are not
10939 translated from input file to output file form, so
10940 set up the offset per the output file. */
10941 r->r_offset = (br_entry->offset
10942 + htab->brlt->output_offset
10943 + htab->brlt->output_section->vma);
10944 r->r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
10945 r->r_addend = dest;
10946 }
10947 }
10948
10949 dest = (br_entry->offset
10950 + htab->brlt->output_offset
10951 + htab->brlt->output_section->vma);
10952
10953 off = (dest
10954 - elf_gp (info->output_bfd)
10955 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
10956
10957 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
10958 {
10959 info->callbacks->einfo
10960 (_("%P: linkage table error against `%T'\n"),
10961 stub_entry->root.string);
10962 bfd_set_error (bfd_error_bad_value);
10963 htab->stub_error = TRUE;
10964 return FALSE;
10965 }
10966
10967 if (info->emitrelocations)
10968 {
10969 r = get_relocs (stub_entry->group->stub_sec, 1 + (PPC_HA (off) != 0));
10970 if (r == NULL)
10971 return FALSE;
10972 r[0].r_offset = loc - stub_entry->group->stub_sec->contents;
10973 if (bfd_big_endian (info->output_bfd))
10974 r[0].r_offset += 2;
10975 if (stub_entry->stub_type == ppc_stub_plt_branch_r2off)
10976 r[0].r_offset += 4;
10977 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10978 r[0].r_addend = dest;
10979 if (PPC_HA (off) != 0)
10980 {
10981 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
10982 r[1].r_offset = r[0].r_offset + 4;
10983 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10984 r[1].r_addend = r[0].r_addend;
10985 }
10986 }
10987
10988 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
10989 {
10990 if (PPC_HA (off) != 0)
10991 {
10992 size = 16;
10993 bfd_put_32 (htab->params->stub_bfd,
10994 ADDIS_R12_R2 | PPC_HA (off), loc);
10995 loc += 4;
10996 bfd_put_32 (htab->params->stub_bfd,
10997 LD_R12_0R12 | PPC_LO (off), loc);
10998 }
10999 else
11000 {
11001 size = 12;
11002 bfd_put_32 (htab->params->stub_bfd,
11003 LD_R12_0R2 | PPC_LO (off), loc);
11004 }
11005 }
11006 else
11007 {
11008 bfd_vma r2off = get_r2off (info, stub_entry);
11009
11010 if (r2off == (bfd_vma) -1)
11011 {
11012 htab->stub_error = TRUE;
11013 return FALSE;
11014 }
11015
11016 bfd_put_32 (htab->params->stub_bfd, STD_R2_0R1 + STK_TOC (htab), loc);
11017 loc += 4;
11018 size = 16;
11019 if (PPC_HA (off) != 0)
11020 {
11021 size += 4;
11022 bfd_put_32 (htab->params->stub_bfd,
11023 ADDIS_R12_R2 | PPC_HA (off), loc);
11024 loc += 4;
11025 bfd_put_32 (htab->params->stub_bfd,
11026 LD_R12_0R12 | PPC_LO (off), loc);
11027 }
11028 else
11029 bfd_put_32 (htab->params->stub_bfd, LD_R12_0R2 | PPC_LO (off), loc);
11030
11031 if (PPC_HA (r2off) != 0)
11032 {
11033 size += 4;
11034 loc += 4;
11035 bfd_put_32 (htab->params->stub_bfd,
11036 ADDIS_R2_R2 | PPC_HA (r2off), loc);
11037 }
11038 if (PPC_LO (r2off) != 0)
11039 {
11040 size += 4;
11041 loc += 4;
11042 bfd_put_32 (htab->params->stub_bfd,
11043 ADDI_R2_R2 | PPC_LO (r2off), loc);
11044 }
11045 }
11046 loc += 4;
11047 bfd_put_32 (htab->params->stub_bfd, MTCTR_R12, loc);
11048 loc += 4;
11049 bfd_put_32 (htab->params->stub_bfd, BCTR, loc);
11050 break;
11051
11052 case ppc_stub_plt_call:
11053 case ppc_stub_plt_call_r2save:
11054 if (stub_entry->h != NULL
11055 && stub_entry->h->is_func_descriptor
11056 && stub_entry->h->oh != NULL)
11057 {
11058 struct ppc_link_hash_entry *fh = ppc_follow_link (stub_entry->h->oh);
11059
11060 /* If the old-ABI "dot-symbol" is undefined make it weak so
11061 we don't get a link error from RELOC_FOR_GLOBAL_SYMBOL. */
11062 if (fh->elf.root.type == bfd_link_hash_undefined
11063 && (stub_entry->h->elf.root.type == bfd_link_hash_defined
11064 || stub_entry->h->elf.root.type == bfd_link_hash_defweak))
11065 fh->elf.root.type = bfd_link_hash_undefweak;
11066 }
11067
11068 /* Now build the stub. */
11069 dest = stub_entry->plt_ent->plt.offset & ~1;
11070 if (dest >= (bfd_vma) -2)
11071 abort ();
11072
11073 plt = htab->elf.splt;
11074 if (!htab->elf.dynamic_sections_created
11075 || stub_entry->h == NULL
11076 || stub_entry->h->elf.dynindx == -1)
11077 plt = htab->elf.iplt;
11078
11079 dest += plt->output_offset + plt->output_section->vma;
11080
11081 if (stub_entry->h == NULL
11082 && (stub_entry->plt_ent->plt.offset & 1) == 0)
11083 {
11084 Elf_Internal_Rela rela;
11085 bfd_byte *rl;
11086
11087 rela.r_offset = dest;
11088 if (htab->opd_abi)
11089 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
11090 else
11091 rela.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
11092 rela.r_addend = (stub_entry->target_value
11093 + stub_entry->target_section->output_offset
11094 + stub_entry->target_section->output_section->vma);
11095
11096 rl = (htab->elf.irelplt->contents
11097 + (htab->elf.irelplt->reloc_count++
11098 * sizeof (Elf64_External_Rela)));
11099 bfd_elf64_swap_reloca_out (info->output_bfd, &rela, rl);
11100 stub_entry->plt_ent->plt.offset |= 1;
11101 htab->local_ifunc_resolver = 1;
11102 }
11103
11104 off = (dest
11105 - elf_gp (info->output_bfd)
11106 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11107
11108 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
11109 {
11110 info->callbacks->einfo
11111 /* xgettext:c-format */
11112 (_("%P: linkage table error against `%T'\n"),
11113 stub_entry->h != NULL
11114 ? stub_entry->h->elf.root.root.string
11115 : "<local sym>");
11116 bfd_set_error (bfd_error_bad_value);
11117 htab->stub_error = TRUE;
11118 return FALSE;
11119 }
11120
11121 if (htab->params->plt_stub_align != 0)
11122 {
11123 unsigned pad = plt_stub_pad (htab, stub_entry, off);
11124
11125 stub_entry->group->stub_sec->size += pad;
11126 stub_entry->stub_offset = stub_entry->group->stub_sec->size;
11127 loc += pad;
11128 }
11129
11130 r = NULL;
11131 if (info->emitrelocations)
11132 {
11133 r = get_relocs (stub_entry->group->stub_sec,
11134 ((PPC_HA (off) != 0)
11135 + (htab->opd_abi
11136 ? 2 + (htab->params->plt_static_chain
11137 && PPC_HA (off + 16) == PPC_HA (off))
11138 : 1)));
11139 if (r == NULL)
11140 return FALSE;
11141 r[0].r_offset = loc - stub_entry->group->stub_sec->contents;
11142 if (bfd_big_endian (info->output_bfd))
11143 r[0].r_offset += 2;
11144 r[0].r_addend = dest;
11145 }
11146 if (stub_entry->h != NULL
11147 && (stub_entry->h == htab->tls_get_addr_fd
11148 || stub_entry->h == htab->tls_get_addr)
11149 && htab->params->tls_get_addr_opt)
11150 p = build_tls_get_addr_stub (htab, stub_entry, loc, off, r);
11151 else
11152 p = build_plt_stub (htab, stub_entry, loc, off, r);
11153 size = p - loc;
11154 break;
11155
11156 case ppc_stub_save_res:
11157 return TRUE;
11158
11159 default:
11160 BFD_FAIL ();
11161 return FALSE;
11162 }
11163
11164 stub_entry->group->stub_sec->size += size;
11165
11166 if (htab->params->emit_stub_syms)
11167 {
11168 struct elf_link_hash_entry *h;
11169 size_t len1, len2;
11170 char *name;
11171 const char *const stub_str[] = { "long_branch",
11172 "long_branch_r2off",
11173 "plt_branch",
11174 "plt_branch_r2off",
11175 "plt_call",
11176 "plt_call" };
11177
11178 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
11179 len2 = strlen (stub_entry->root.string);
11180 name = bfd_malloc (len1 + len2 + 2);
11181 if (name == NULL)
11182 return FALSE;
11183 memcpy (name, stub_entry->root.string, 9);
11184 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
11185 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
11186 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
11187 if (h == NULL)
11188 return FALSE;
11189 if (h->root.type == bfd_link_hash_new)
11190 {
11191 h->root.type = bfd_link_hash_defined;
11192 h->root.u.def.section = stub_entry->group->stub_sec;
11193 h->root.u.def.value = stub_entry->stub_offset;
11194 h->ref_regular = 1;
11195 h->def_regular = 1;
11196 h->ref_regular_nonweak = 1;
11197 h->forced_local = 1;
11198 h->non_elf = 0;
11199 h->root.linker_def = 1;
11200 }
11201 }
11202
11203 return TRUE;
11204 }
11205
11206 /* As above, but don't actually build the stub. Just bump offset so
11207 we know stub section sizes, and select plt_branch stubs where
11208 long_branch stubs won't do. */
11209
11210 static bfd_boolean
11211 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
11212 {
11213 struct ppc_stub_hash_entry *stub_entry;
11214 struct bfd_link_info *info;
11215 struct ppc_link_hash_table *htab;
11216 bfd_vma off;
11217 int size;
11218
11219 /* Massage our args to the form they really have. */
11220 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
11221 info = in_arg;
11222
11223 htab = ppc_hash_table (info);
11224 if (htab == NULL)
11225 return FALSE;
11226
11227 if (stub_entry->h != NULL
11228 && stub_entry->h->save_res
11229 && stub_entry->h->elf.root.type == bfd_link_hash_defined
11230 && stub_entry->h->elf.root.u.def.section == htab->sfpr)
11231 {
11232 /* Don't make stubs to out-of-line register save/restore
11233 functions. Instead, emit copies of the functions. */
11234 stub_entry->group->needs_save_res = 1;
11235 stub_entry->stub_type = ppc_stub_save_res;
11236 return TRUE;
11237 }
11238
11239 if (stub_entry->stub_type == ppc_stub_plt_call
11240 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
11241 {
11242 asection *plt;
11243 off = stub_entry->plt_ent->plt.offset & ~(bfd_vma) 1;
11244 if (off >= (bfd_vma) -2)
11245 abort ();
11246 plt = htab->elf.splt;
11247 if (!htab->elf.dynamic_sections_created
11248 || stub_entry->h == NULL
11249 || stub_entry->h->elf.dynindx == -1)
11250 plt = htab->elf.iplt;
11251 off += (plt->output_offset
11252 + plt->output_section->vma
11253 - elf_gp (info->output_bfd)
11254 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11255
11256 size = plt_stub_size (htab, stub_entry, off);
11257 if (stub_entry->h != NULL
11258 && (stub_entry->h == htab->tls_get_addr_fd
11259 || stub_entry->h == htab->tls_get_addr)
11260 && htab->params->tls_get_addr_opt
11261 && (ALWAYS_EMIT_R2SAVE
11262 || stub_entry->stub_type == ppc_stub_plt_call_r2save))
11263 stub_entry->group->tls_get_addr_opt_bctrl
11264 = stub_entry->group->stub_sec->size + size - 5 * 4;
11265
11266 if (htab->params->plt_stub_align)
11267 size += plt_stub_pad (htab, stub_entry, off);
11268 if (info->emitrelocations)
11269 {
11270 stub_entry->group->stub_sec->reloc_count
11271 += ((PPC_HA (off) != 0)
11272 + (htab->opd_abi
11273 ? 2 + (htab->params->plt_static_chain
11274 && PPC_HA (off + 16) == PPC_HA (off))
11275 : 1));
11276 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11277 }
11278 }
11279 else
11280 {
11281 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
11282 variants. */
11283 bfd_vma r2off = 0;
11284 bfd_vma local_off = 0;
11285
11286 off = (stub_entry->target_value
11287 + stub_entry->target_section->output_offset
11288 + stub_entry->target_section->output_section->vma);
11289 off -= (stub_entry->group->stub_sec->size
11290 + stub_entry->group->stub_sec->output_offset
11291 + stub_entry->group->stub_sec->output_section->vma);
11292
11293 /* Reset the stub type from the plt variant in case we now
11294 can reach with a shorter stub. */
11295 if (stub_entry->stub_type >= ppc_stub_plt_branch)
11296 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
11297
11298 size = 4;
11299 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
11300 {
11301 r2off = get_r2off (info, stub_entry);
11302 if (r2off == (bfd_vma) -1)
11303 {
11304 htab->stub_error = TRUE;
11305 return FALSE;
11306 }
11307 size = 8;
11308 if (PPC_HA (r2off) != 0)
11309 size += 4;
11310 if (PPC_LO (r2off) != 0)
11311 size += 4;
11312 off -= size - 4;
11313 }
11314
11315 local_off = PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
11316
11317 /* If the branch offset if too big, use a ppc_stub_plt_branch.
11318 Do the same for -R objects without function descriptors. */
11319 if (off + (1 << 25) >= (bfd_vma) (1 << 26) - local_off
11320 || (stub_entry->stub_type == ppc_stub_long_branch_r2off
11321 && r2off == 0
11322 && htab->sec_info[stub_entry->target_section->id].toc_off == 0))
11323 {
11324 struct ppc_branch_hash_entry *br_entry;
11325
11326 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
11327 stub_entry->root.string + 9,
11328 TRUE, FALSE);
11329 if (br_entry == NULL)
11330 {
11331 info->callbacks->einfo (_("%P: can't build branch stub `%s'\n"),
11332 stub_entry->root.string);
11333 htab->stub_error = TRUE;
11334 return FALSE;
11335 }
11336
11337 if (br_entry->iter != htab->stub_iteration)
11338 {
11339 br_entry->iter = htab->stub_iteration;
11340 br_entry->offset = htab->brlt->size;
11341 htab->brlt->size += 8;
11342
11343 if (htab->relbrlt != NULL)
11344 htab->relbrlt->size += sizeof (Elf64_External_Rela);
11345 else if (info->emitrelocations)
11346 {
11347 htab->brlt->reloc_count += 1;
11348 htab->brlt->flags |= SEC_RELOC;
11349 }
11350 }
11351
11352 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
11353 off = (br_entry->offset
11354 + htab->brlt->output_offset
11355 + htab->brlt->output_section->vma
11356 - elf_gp (info->output_bfd)
11357 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11358
11359 if (info->emitrelocations)
11360 {
11361 stub_entry->group->stub_sec->reloc_count
11362 += 1 + (PPC_HA (off) != 0);
11363 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11364 }
11365
11366 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
11367 {
11368 size = 12;
11369 if (PPC_HA (off) != 0)
11370 size = 16;
11371 }
11372 else
11373 {
11374 size = 16;
11375 if (PPC_HA (off) != 0)
11376 size += 4;
11377
11378 if (PPC_HA (r2off) != 0)
11379 size += 4;
11380 if (PPC_LO (r2off) != 0)
11381 size += 4;
11382 }
11383 }
11384 else if (info->emitrelocations)
11385 {
11386 stub_entry->group->stub_sec->reloc_count += 1;
11387 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11388 }
11389 }
11390
11391 stub_entry->group->stub_sec->size += size;
11392 return TRUE;
11393 }
11394
11395 /* Set up various things so that we can make a list of input sections
11396 for each output section included in the link. Returns -1 on error,
11397 0 when no stubs will be needed, and 1 on success. */
11398
11399 int
11400 ppc64_elf_setup_section_lists (struct bfd_link_info *info)
11401 {
11402 unsigned int id;
11403 bfd_size_type amt;
11404 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11405
11406 if (htab == NULL)
11407 return -1;
11408
11409 htab->sec_info_arr_size = bfd_get_next_section_id ();
11410 amt = sizeof (*htab->sec_info) * (htab->sec_info_arr_size);
11411 htab->sec_info = bfd_zmalloc (amt);
11412 if (htab->sec_info == NULL)
11413 return -1;
11414
11415 /* Set toc_off for com, und, abs and ind sections. */
11416 for (id = 0; id < 3; id++)
11417 htab->sec_info[id].toc_off = TOC_BASE_OFF;
11418
11419 return 1;
11420 }
11421
11422 /* Set up for first pass at multitoc partitioning. */
11423
11424 void
11425 ppc64_elf_start_multitoc_partition (struct bfd_link_info *info)
11426 {
11427 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11428
11429 htab->toc_curr = ppc64_elf_set_toc (info, info->output_bfd);
11430 htab->toc_bfd = NULL;
11431 htab->toc_first_sec = NULL;
11432 }
11433
11434 /* The linker repeatedly calls this function for each TOC input section
11435 and linker generated GOT section. Group input bfds such that the toc
11436 within a group is less than 64k in size. */
11437
11438 bfd_boolean
11439 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
11440 {
11441 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11442 bfd_vma addr, off, limit;
11443
11444 if (htab == NULL)
11445 return FALSE;
11446
11447 if (!htab->second_toc_pass)
11448 {
11449 /* Keep track of the first .toc or .got section for this input bfd. */
11450 bfd_boolean new_bfd = htab->toc_bfd != isec->owner;
11451
11452 if (new_bfd)
11453 {
11454 htab->toc_bfd = isec->owner;
11455 htab->toc_first_sec = isec;
11456 }
11457
11458 addr = isec->output_offset + isec->output_section->vma;
11459 off = addr - htab->toc_curr;
11460 limit = 0x80008000;
11461 if (ppc64_elf_tdata (isec->owner)->has_small_toc_reloc)
11462 limit = 0x10000;
11463 if (off + isec->size > limit)
11464 {
11465 addr = (htab->toc_first_sec->output_offset
11466 + htab->toc_first_sec->output_section->vma);
11467 htab->toc_curr = addr;
11468 htab->toc_curr &= -TOC_BASE_ALIGN;
11469 }
11470
11471 /* toc_curr is the base address of this toc group. Set elf_gp
11472 for the input section to be the offset relative to the
11473 output toc base plus 0x8000. Making the input elf_gp an
11474 offset allows us to move the toc as a whole without
11475 recalculating input elf_gp. */
11476 off = htab->toc_curr - elf_gp (info->output_bfd);
11477 off += TOC_BASE_OFF;
11478
11479 /* Die if someone uses a linker script that doesn't keep input
11480 file .toc and .got together. */
11481 if (new_bfd
11482 && elf_gp (isec->owner) != 0
11483 && elf_gp (isec->owner) != off)
11484 return FALSE;
11485
11486 elf_gp (isec->owner) = off;
11487 return TRUE;
11488 }
11489
11490 /* During the second pass toc_first_sec points to the start of
11491 a toc group, and toc_curr is used to track the old elf_gp.
11492 We use toc_bfd to ensure we only look at each bfd once. */
11493 if (htab->toc_bfd == isec->owner)
11494 return TRUE;
11495 htab->toc_bfd = isec->owner;
11496
11497 if (htab->toc_first_sec == NULL
11498 || htab->toc_curr != elf_gp (isec->owner))
11499 {
11500 htab->toc_curr = elf_gp (isec->owner);
11501 htab->toc_first_sec = isec;
11502 }
11503 addr = (htab->toc_first_sec->output_offset
11504 + htab->toc_first_sec->output_section->vma);
11505 off = addr - elf_gp (info->output_bfd) + TOC_BASE_OFF;
11506 elf_gp (isec->owner) = off;
11507
11508 return TRUE;
11509 }
11510
11511 /* Called via elf_link_hash_traverse to merge GOT entries for global
11512 symbol H. */
11513
11514 static bfd_boolean
11515 merge_global_got (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
11516 {
11517 if (h->root.type == bfd_link_hash_indirect)
11518 return TRUE;
11519
11520 merge_got_entries (&h->got.glist);
11521
11522 return TRUE;
11523 }
11524
11525 /* Called via elf_link_hash_traverse to allocate GOT entries for global
11526 symbol H. */
11527
11528 static bfd_boolean
11529 reallocate_got (struct elf_link_hash_entry *h, void *inf)
11530 {
11531 struct got_entry *gent;
11532
11533 if (h->root.type == bfd_link_hash_indirect)
11534 return TRUE;
11535
11536 for (gent = h->got.glist; gent != NULL; gent = gent->next)
11537 if (!gent->is_indirect)
11538 allocate_got (h, (struct bfd_link_info *) inf, gent);
11539 return TRUE;
11540 }
11541
11542 /* Called on the first multitoc pass after the last call to
11543 ppc64_elf_next_toc_section. This function removes duplicate GOT
11544 entries. */
11545
11546 bfd_boolean
11547 ppc64_elf_layout_multitoc (struct bfd_link_info *info)
11548 {
11549 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11550 struct bfd *ibfd, *ibfd2;
11551 bfd_boolean done_something;
11552
11553 htab->multi_toc_needed = htab->toc_curr != elf_gp (info->output_bfd);
11554
11555 if (!htab->do_multi_toc)
11556 return FALSE;
11557
11558 /* Merge global sym got entries within a toc group. */
11559 elf_link_hash_traverse (&htab->elf, merge_global_got, info);
11560
11561 /* And tlsld_got. */
11562 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11563 {
11564 struct got_entry *ent, *ent2;
11565
11566 if (!is_ppc64_elf (ibfd))
11567 continue;
11568
11569 ent = ppc64_tlsld_got (ibfd);
11570 if (!ent->is_indirect
11571 && ent->got.offset != (bfd_vma) -1)
11572 {
11573 for (ibfd2 = ibfd->link.next; ibfd2 != NULL; ibfd2 = ibfd2->link.next)
11574 {
11575 if (!is_ppc64_elf (ibfd2))
11576 continue;
11577
11578 ent2 = ppc64_tlsld_got (ibfd2);
11579 if (!ent2->is_indirect
11580 && ent2->got.offset != (bfd_vma) -1
11581 && elf_gp (ibfd2) == elf_gp (ibfd))
11582 {
11583 ent2->is_indirect = TRUE;
11584 ent2->got.ent = ent;
11585 }
11586 }
11587 }
11588 }
11589
11590 /* Zap sizes of got sections. */
11591 htab->elf.irelplt->rawsize = htab->elf.irelplt->size;
11592 htab->elf.irelplt->size -= htab->got_reli_size;
11593 htab->got_reli_size = 0;
11594
11595 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11596 {
11597 asection *got, *relgot;
11598
11599 if (!is_ppc64_elf (ibfd))
11600 continue;
11601
11602 got = ppc64_elf_tdata (ibfd)->got;
11603 if (got != NULL)
11604 {
11605 got->rawsize = got->size;
11606 got->size = 0;
11607 relgot = ppc64_elf_tdata (ibfd)->relgot;
11608 relgot->rawsize = relgot->size;
11609 relgot->size = 0;
11610 }
11611 }
11612
11613 /* Now reallocate the got, local syms first. We don't need to
11614 allocate section contents again since we never increase size. */
11615 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11616 {
11617 struct got_entry **lgot_ents;
11618 struct got_entry **end_lgot_ents;
11619 struct plt_entry **local_plt;
11620 struct plt_entry **end_local_plt;
11621 unsigned char *lgot_masks;
11622 bfd_size_type locsymcount;
11623 Elf_Internal_Shdr *symtab_hdr;
11624 asection *s;
11625
11626 if (!is_ppc64_elf (ibfd))
11627 continue;
11628
11629 lgot_ents = elf_local_got_ents (ibfd);
11630 if (!lgot_ents)
11631 continue;
11632
11633 symtab_hdr = &elf_symtab_hdr (ibfd);
11634 locsymcount = symtab_hdr->sh_info;
11635 end_lgot_ents = lgot_ents + locsymcount;
11636 local_plt = (struct plt_entry **) end_lgot_ents;
11637 end_local_plt = local_plt + locsymcount;
11638 lgot_masks = (unsigned char *) end_local_plt;
11639 s = ppc64_elf_tdata (ibfd)->got;
11640 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
11641 {
11642 struct got_entry *ent;
11643
11644 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
11645 {
11646 unsigned int ent_size = 8;
11647 unsigned int rel_size = sizeof (Elf64_External_Rela);
11648
11649 ent->got.offset = s->size;
11650 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
11651 {
11652 ent_size *= 2;
11653 rel_size *= 2;
11654 }
11655 s->size += ent_size;
11656 if ((*lgot_masks & PLT_IFUNC) != 0)
11657 {
11658 htab->elf.irelplt->size += rel_size;
11659 htab->got_reli_size += rel_size;
11660 }
11661 else if (bfd_link_pic (info))
11662 {
11663 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
11664 srel->size += rel_size;
11665 }
11666 }
11667 }
11668 }
11669
11670 elf_link_hash_traverse (&htab->elf, reallocate_got, info);
11671
11672 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11673 {
11674 struct got_entry *ent;
11675
11676 if (!is_ppc64_elf (ibfd))
11677 continue;
11678
11679 ent = ppc64_tlsld_got (ibfd);
11680 if (!ent->is_indirect
11681 && ent->got.offset != (bfd_vma) -1)
11682 {
11683 asection *s = ppc64_elf_tdata (ibfd)->got;
11684 ent->got.offset = s->size;
11685 s->size += 16;
11686 if (bfd_link_pic (info))
11687 {
11688 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
11689 srel->size += sizeof (Elf64_External_Rela);
11690 }
11691 }
11692 }
11693
11694 done_something = htab->elf.irelplt->rawsize != htab->elf.irelplt->size;
11695 if (!done_something)
11696 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11697 {
11698 asection *got;
11699
11700 if (!is_ppc64_elf (ibfd))
11701 continue;
11702
11703 got = ppc64_elf_tdata (ibfd)->got;
11704 if (got != NULL)
11705 {
11706 done_something = got->rawsize != got->size;
11707 if (done_something)
11708 break;
11709 }
11710 }
11711
11712 if (done_something)
11713 (*htab->params->layout_sections_again) ();
11714
11715 /* Set up for second pass over toc sections to recalculate elf_gp
11716 on input sections. */
11717 htab->toc_bfd = NULL;
11718 htab->toc_first_sec = NULL;
11719 htab->second_toc_pass = TRUE;
11720 return done_something;
11721 }
11722
11723 /* Called after second pass of multitoc partitioning. */
11724
11725 void
11726 ppc64_elf_finish_multitoc_partition (struct bfd_link_info *info)
11727 {
11728 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11729
11730 /* After the second pass, toc_curr tracks the TOC offset used
11731 for code sections below in ppc64_elf_next_input_section. */
11732 htab->toc_curr = TOC_BASE_OFF;
11733 }
11734
11735 /* No toc references were found in ISEC. If the code in ISEC makes no
11736 calls, then there's no need to use toc adjusting stubs when branching
11737 into ISEC. Actually, indirect calls from ISEC are OK as they will
11738 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
11739 needed, and 2 if a cyclical call-graph was found but no other reason
11740 for a stub was detected. If called from the top level, a return of
11741 2 means the same as a return of 0. */
11742
11743 static int
11744 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
11745 {
11746 int ret;
11747
11748 /* Mark this section as checked. */
11749 isec->call_check_done = 1;
11750
11751 /* We know none of our code bearing sections will need toc stubs. */
11752 if ((isec->flags & SEC_LINKER_CREATED) != 0)
11753 return 0;
11754
11755 if (isec->size == 0)
11756 return 0;
11757
11758 if (isec->output_section == NULL)
11759 return 0;
11760
11761 ret = 0;
11762 if (isec->reloc_count != 0)
11763 {
11764 Elf_Internal_Rela *relstart, *rel;
11765 Elf_Internal_Sym *local_syms;
11766 struct ppc_link_hash_table *htab;
11767
11768 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
11769 info->keep_memory);
11770 if (relstart == NULL)
11771 return -1;
11772
11773 /* Look for branches to outside of this section. */
11774 local_syms = NULL;
11775 htab = ppc_hash_table (info);
11776 if (htab == NULL)
11777 return -1;
11778
11779 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
11780 {
11781 enum elf_ppc64_reloc_type r_type;
11782 unsigned long r_symndx;
11783 struct elf_link_hash_entry *h;
11784 struct ppc_link_hash_entry *eh;
11785 Elf_Internal_Sym *sym;
11786 asection *sym_sec;
11787 struct _opd_sec_data *opd;
11788 bfd_vma sym_value;
11789 bfd_vma dest;
11790
11791 r_type = ELF64_R_TYPE (rel->r_info);
11792 if (r_type != R_PPC64_REL24
11793 && r_type != R_PPC64_REL14
11794 && r_type != R_PPC64_REL14_BRTAKEN
11795 && r_type != R_PPC64_REL14_BRNTAKEN)
11796 continue;
11797
11798 r_symndx = ELF64_R_SYM (rel->r_info);
11799 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
11800 isec->owner))
11801 {
11802 ret = -1;
11803 break;
11804 }
11805
11806 /* Calls to dynamic lib functions go through a plt call stub
11807 that uses r2. */
11808 eh = (struct ppc_link_hash_entry *) h;
11809 if (eh != NULL
11810 && (eh->elf.plt.plist != NULL
11811 || (eh->oh != NULL
11812 && ppc_follow_link (eh->oh)->elf.plt.plist != NULL)))
11813 {
11814 ret = 1;
11815 break;
11816 }
11817
11818 if (sym_sec == NULL)
11819 /* Ignore other undefined symbols. */
11820 continue;
11821
11822 /* Assume branches to other sections not included in the
11823 link need stubs too, to cover -R and absolute syms. */
11824 if (sym_sec->output_section == NULL)
11825 {
11826 ret = 1;
11827 break;
11828 }
11829
11830 if (h == NULL)
11831 sym_value = sym->st_value;
11832 else
11833 {
11834 if (h->root.type != bfd_link_hash_defined
11835 && h->root.type != bfd_link_hash_defweak)
11836 abort ();
11837 sym_value = h->root.u.def.value;
11838 }
11839 sym_value += rel->r_addend;
11840
11841 /* If this branch reloc uses an opd sym, find the code section. */
11842 opd = get_opd_info (sym_sec);
11843 if (opd != NULL)
11844 {
11845 if (h == NULL && opd->adjust != NULL)
11846 {
11847 long adjust;
11848
11849 adjust = opd->adjust[OPD_NDX (sym_value)];
11850 if (adjust == -1)
11851 /* Assume deleted functions won't ever be called. */
11852 continue;
11853 sym_value += adjust;
11854 }
11855
11856 dest = opd_entry_value (sym_sec, sym_value,
11857 &sym_sec, NULL, FALSE);
11858 if (dest == (bfd_vma) -1)
11859 continue;
11860 }
11861 else
11862 dest = (sym_value
11863 + sym_sec->output_offset
11864 + sym_sec->output_section->vma);
11865
11866 /* Ignore branch to self. */
11867 if (sym_sec == isec)
11868 continue;
11869
11870 /* If the called function uses the toc, we need a stub. */
11871 if (sym_sec->has_toc_reloc
11872 || sym_sec->makes_toc_func_call)
11873 {
11874 ret = 1;
11875 break;
11876 }
11877
11878 /* Assume any branch that needs a long branch stub might in fact
11879 need a plt_branch stub. A plt_branch stub uses r2. */
11880 else if (dest - (isec->output_offset
11881 + isec->output_section->vma
11882 + rel->r_offset) + (1 << 25)
11883 >= (2u << 25) - PPC64_LOCAL_ENTRY_OFFSET (h
11884 ? h->other
11885 : sym->st_other))
11886 {
11887 ret = 1;
11888 break;
11889 }
11890
11891 /* If calling back to a section in the process of being
11892 tested, we can't say for sure that no toc adjusting stubs
11893 are needed, so don't return zero. */
11894 else if (sym_sec->call_check_in_progress)
11895 ret = 2;
11896
11897 /* Branches to another section that itself doesn't have any TOC
11898 references are OK. Recursively call ourselves to check. */
11899 else if (!sym_sec->call_check_done)
11900 {
11901 int recur;
11902
11903 /* Mark current section as indeterminate, so that other
11904 sections that call back to current won't be marked as
11905 known. */
11906 isec->call_check_in_progress = 1;
11907 recur = toc_adjusting_stub_needed (info, sym_sec);
11908 isec->call_check_in_progress = 0;
11909
11910 if (recur != 0)
11911 {
11912 ret = recur;
11913 if (recur != 2)
11914 break;
11915 }
11916 }
11917 }
11918
11919 if (local_syms != NULL
11920 && (elf_symtab_hdr (isec->owner).contents
11921 != (unsigned char *) local_syms))
11922 free (local_syms);
11923 if (elf_section_data (isec)->relocs != relstart)
11924 free (relstart);
11925 }
11926
11927 if ((ret & 1) == 0
11928 && isec->map_head.s != NULL
11929 && (strcmp (isec->output_section->name, ".init") == 0
11930 || strcmp (isec->output_section->name, ".fini") == 0))
11931 {
11932 if (isec->map_head.s->has_toc_reloc
11933 || isec->map_head.s->makes_toc_func_call)
11934 ret = 1;
11935 else if (!isec->map_head.s->call_check_done)
11936 {
11937 int recur;
11938 isec->call_check_in_progress = 1;
11939 recur = toc_adjusting_stub_needed (info, isec->map_head.s);
11940 isec->call_check_in_progress = 0;
11941 if (recur != 0)
11942 ret = recur;
11943 }
11944 }
11945
11946 if (ret == 1)
11947 isec->makes_toc_func_call = 1;
11948
11949 return ret;
11950 }
11951
11952 /* The linker repeatedly calls this function for each input section,
11953 in the order that input sections are linked into output sections.
11954 Build lists of input sections to determine groupings between which
11955 we may insert linker stubs. */
11956
11957 bfd_boolean
11958 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
11959 {
11960 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11961
11962 if (htab == NULL)
11963 return FALSE;
11964
11965 if ((isec->output_section->flags & SEC_CODE) != 0
11966 && isec->output_section->id < htab->sec_info_arr_size)
11967 {
11968 /* This happens to make the list in reverse order,
11969 which is what we want. */
11970 htab->sec_info[isec->id].u.list
11971 = htab->sec_info[isec->output_section->id].u.list;
11972 htab->sec_info[isec->output_section->id].u.list = isec;
11973 }
11974
11975 if (htab->multi_toc_needed)
11976 {
11977 /* Analyse sections that aren't already flagged as needing a
11978 valid toc pointer. Exclude .fixup for the linux kernel.
11979 .fixup contains branches, but only back to the function that
11980 hit an exception. */
11981 if (!(isec->has_toc_reloc
11982 || (isec->flags & SEC_CODE) == 0
11983 || strcmp (isec->name, ".fixup") == 0
11984 || isec->call_check_done))
11985 {
11986 if (toc_adjusting_stub_needed (info, isec) < 0)
11987 return FALSE;
11988 }
11989 /* Make all sections use the TOC assigned for this object file.
11990 This will be wrong for pasted sections; We fix that in
11991 check_pasted_section(). */
11992 if (elf_gp (isec->owner) != 0)
11993 htab->toc_curr = elf_gp (isec->owner);
11994 }
11995
11996 htab->sec_info[isec->id].toc_off = htab->toc_curr;
11997 return TRUE;
11998 }
11999
12000 /* Check that all .init and .fini sections use the same toc, if they
12001 have toc relocs. */
12002
12003 static bfd_boolean
12004 check_pasted_section (struct bfd_link_info *info, const char *name)
12005 {
12006 asection *o = bfd_get_section_by_name (info->output_bfd, name);
12007
12008 if (o != NULL)
12009 {
12010 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12011 bfd_vma toc_off = 0;
12012 asection *i;
12013
12014 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
12015 if (i->has_toc_reloc)
12016 {
12017 if (toc_off == 0)
12018 toc_off = htab->sec_info[i->id].toc_off;
12019 else if (toc_off != htab->sec_info[i->id].toc_off)
12020 return FALSE;
12021 }
12022
12023 if (toc_off == 0)
12024 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
12025 if (i->makes_toc_func_call)
12026 {
12027 toc_off = htab->sec_info[i->id].toc_off;
12028 break;
12029 }
12030
12031 /* Make sure the whole pasted function uses the same toc offset. */
12032 if (toc_off != 0)
12033 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
12034 htab->sec_info[i->id].toc_off = toc_off;
12035 }
12036 return TRUE;
12037 }
12038
12039 bfd_boolean
12040 ppc64_elf_check_init_fini (struct bfd_link_info *info)
12041 {
12042 return (check_pasted_section (info, ".init")
12043 & check_pasted_section (info, ".fini"));
12044 }
12045
12046 /* See whether we can group stub sections together. Grouping stub
12047 sections may result in fewer stubs. More importantly, we need to
12048 put all .init* and .fini* stubs at the beginning of the .init or
12049 .fini output sections respectively, because glibc splits the
12050 _init and _fini functions into multiple parts. Putting a stub in
12051 the middle of a function is not a good idea. */
12052
12053 static bfd_boolean
12054 group_sections (struct bfd_link_info *info,
12055 bfd_size_type stub_group_size,
12056 bfd_boolean stubs_always_before_branch)
12057 {
12058 struct ppc_link_hash_table *htab;
12059 asection *osec;
12060 bfd_boolean suppress_size_errors;
12061
12062 htab = ppc_hash_table (info);
12063 if (htab == NULL)
12064 return FALSE;
12065
12066 suppress_size_errors = FALSE;
12067 if (stub_group_size == 1)
12068 {
12069 /* Default values. */
12070 if (stubs_always_before_branch)
12071 stub_group_size = 0x1e00000;
12072 else
12073 stub_group_size = 0x1c00000;
12074 suppress_size_errors = TRUE;
12075 }
12076
12077 for (osec = info->output_bfd->sections; osec != NULL; osec = osec->next)
12078 {
12079 asection *tail;
12080
12081 if (osec->id >= htab->sec_info_arr_size)
12082 continue;
12083
12084 tail = htab->sec_info[osec->id].u.list;
12085 while (tail != NULL)
12086 {
12087 asection *curr;
12088 asection *prev;
12089 bfd_size_type total;
12090 bfd_boolean big_sec;
12091 bfd_vma curr_toc;
12092 struct map_stub *group;
12093 bfd_size_type group_size;
12094
12095 curr = tail;
12096 total = tail->size;
12097 group_size = (ppc64_elf_section_data (tail) != NULL
12098 && ppc64_elf_section_data (tail)->has_14bit_branch
12099 ? stub_group_size >> 10 : stub_group_size);
12100
12101 big_sec = total > group_size;
12102 if (big_sec && !suppress_size_errors)
12103 /* xgettext:c-format */
12104 _bfd_error_handler (_("%B section %A exceeds stub group size"),
12105 tail->owner, tail);
12106 curr_toc = htab->sec_info[tail->id].toc_off;
12107
12108 while ((prev = htab->sec_info[curr->id].u.list) != NULL
12109 && ((total += curr->output_offset - prev->output_offset)
12110 < (ppc64_elf_section_data (prev) != NULL
12111 && ppc64_elf_section_data (prev)->has_14bit_branch
12112 ? (group_size = stub_group_size >> 10) : group_size))
12113 && htab->sec_info[prev->id].toc_off == curr_toc)
12114 curr = prev;
12115
12116 /* OK, the size from the start of CURR to the end is less
12117 than group_size and thus can be handled by one stub
12118 section. (or the tail section is itself larger than
12119 group_size, in which case we may be toast.) We should
12120 really be keeping track of the total size of stubs added
12121 here, as stubs contribute to the final output section
12122 size. That's a little tricky, and this way will only
12123 break if stubs added make the total size more than 2^25,
12124 ie. for the default stub_group_size, if stubs total more
12125 than 2097152 bytes, or nearly 75000 plt call stubs. */
12126 group = bfd_alloc (curr->owner, sizeof (*group));
12127 if (group == NULL)
12128 return FALSE;
12129 group->link_sec = curr;
12130 group->stub_sec = NULL;
12131 group->needs_save_res = 0;
12132 group->tls_get_addr_opt_bctrl = -1u;
12133 group->next = htab->group;
12134 htab->group = group;
12135 do
12136 {
12137 prev = htab->sec_info[tail->id].u.list;
12138 /* Set up this stub group. */
12139 htab->sec_info[tail->id].u.group = group;
12140 }
12141 while (tail != curr && (tail = prev) != NULL);
12142
12143 /* But wait, there's more! Input sections up to group_size
12144 bytes before the stub section can be handled by it too.
12145 Don't do this if we have a really large section after the
12146 stubs, as adding more stubs increases the chance that
12147 branches may not reach into the stub section. */
12148 if (!stubs_always_before_branch && !big_sec)
12149 {
12150 total = 0;
12151 while (prev != NULL
12152 && ((total += tail->output_offset - prev->output_offset)
12153 < (ppc64_elf_section_data (prev) != NULL
12154 && ppc64_elf_section_data (prev)->has_14bit_branch
12155 ? (group_size = stub_group_size >> 10) : group_size))
12156 && htab->sec_info[prev->id].toc_off == curr_toc)
12157 {
12158 tail = prev;
12159 prev = htab->sec_info[tail->id].u.list;
12160 htab->sec_info[tail->id].u.group = group;
12161 }
12162 }
12163 tail = prev;
12164 }
12165 }
12166 return TRUE;
12167 }
12168
12169 static const unsigned char glink_eh_frame_cie[] =
12170 {
12171 0, 0, 0, 16, /* length. */
12172 0, 0, 0, 0, /* id. */
12173 1, /* CIE version. */
12174 'z', 'R', 0, /* Augmentation string. */
12175 4, /* Code alignment. */
12176 0x78, /* Data alignment. */
12177 65, /* RA reg. */
12178 1, /* Augmentation size. */
12179 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
12180 DW_CFA_def_cfa, 1, 0 /* def_cfa: r1 offset 0. */
12181 };
12182
12183 static size_t
12184 stub_eh_frame_size (struct map_stub *group, size_t align)
12185 {
12186 size_t this_size = 17;
12187 if (group->tls_get_addr_opt_bctrl != -1u)
12188 {
12189 unsigned int to_bctrl = group->tls_get_addr_opt_bctrl / 4;
12190 if (to_bctrl < 64)
12191 this_size += 1;
12192 else if (to_bctrl < 256)
12193 this_size += 2;
12194 else if (to_bctrl < 65536)
12195 this_size += 3;
12196 else
12197 this_size += 5;
12198 this_size += 6;
12199 }
12200 this_size = (this_size + align - 1) & -align;
12201 return this_size;
12202 }
12203
12204 /* Stripping output sections is normally done before dynamic section
12205 symbols have been allocated. This function is called later, and
12206 handles cases like htab->brlt which is mapped to its own output
12207 section. */
12208
12209 static void
12210 maybe_strip_output (struct bfd_link_info *info, asection *isec)
12211 {
12212 if (isec->size == 0
12213 && isec->output_section->size == 0
12214 && !(isec->output_section->flags & SEC_KEEP)
12215 && !bfd_section_removed_from_list (info->output_bfd,
12216 isec->output_section)
12217 && elf_section_data (isec->output_section)->dynindx == 0)
12218 {
12219 isec->output_section->flags |= SEC_EXCLUDE;
12220 bfd_section_list_remove (info->output_bfd, isec->output_section);
12221 info->output_bfd->section_count--;
12222 }
12223 }
12224
12225 /* Determine and set the size of the stub section for a final link.
12226
12227 The basic idea here is to examine all the relocations looking for
12228 PC-relative calls to a target that is unreachable with a "bl"
12229 instruction. */
12230
12231 bfd_boolean
12232 ppc64_elf_size_stubs (struct bfd_link_info *info)
12233 {
12234 bfd_size_type stub_group_size;
12235 bfd_boolean stubs_always_before_branch;
12236 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12237
12238 if (htab == NULL)
12239 return FALSE;
12240
12241 if (htab->params->plt_thread_safe == -1 && !bfd_link_executable (info))
12242 htab->params->plt_thread_safe = 1;
12243 if (!htab->opd_abi)
12244 htab->params->plt_thread_safe = 0;
12245 else if (htab->params->plt_thread_safe == -1)
12246 {
12247 static const char *const thread_starter[] =
12248 {
12249 "pthread_create",
12250 /* libstdc++ */
12251 "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE",
12252 /* librt */
12253 "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio",
12254 "mq_notify", "create_timer",
12255 /* libanl */
12256 "getaddrinfo_a",
12257 /* libgomp */
12258 "GOMP_parallel",
12259 "GOMP_parallel_start",
12260 "GOMP_parallel_loop_static",
12261 "GOMP_parallel_loop_static_start",
12262 "GOMP_parallel_loop_dynamic",
12263 "GOMP_parallel_loop_dynamic_start",
12264 "GOMP_parallel_loop_guided",
12265 "GOMP_parallel_loop_guided_start",
12266 "GOMP_parallel_loop_runtime",
12267 "GOMP_parallel_loop_runtime_start",
12268 "GOMP_parallel_sections",
12269 "GOMP_parallel_sections_start",
12270 /* libgo */
12271 "__go_go",
12272 };
12273 unsigned i;
12274
12275 for (i = 0; i < ARRAY_SIZE (thread_starter); i++)
12276 {
12277 struct elf_link_hash_entry *h;
12278 h = elf_link_hash_lookup (&htab->elf, thread_starter[i],
12279 FALSE, FALSE, TRUE);
12280 htab->params->plt_thread_safe = h != NULL && h->ref_regular;
12281 if (htab->params->plt_thread_safe)
12282 break;
12283 }
12284 }
12285 stubs_always_before_branch = htab->params->group_size < 0;
12286 if (htab->params->group_size < 0)
12287 stub_group_size = -htab->params->group_size;
12288 else
12289 stub_group_size = htab->params->group_size;
12290
12291 if (!group_sections (info, stub_group_size, stubs_always_before_branch))
12292 return FALSE;
12293
12294 #define STUB_SHRINK_ITER 20
12295 /* Loop until no stubs added. After iteration 20 of this loop we may
12296 exit on a stub section shrinking. This is to break out of a
12297 pathological case where adding stubs on one iteration decreases
12298 section gaps (perhaps due to alignment), which then requires
12299 fewer or smaller stubs on the next iteration. */
12300
12301 while (1)
12302 {
12303 bfd *input_bfd;
12304 unsigned int bfd_indx;
12305 struct map_stub *group;
12306
12307 htab->stub_iteration += 1;
12308
12309 for (input_bfd = info->input_bfds, bfd_indx = 0;
12310 input_bfd != NULL;
12311 input_bfd = input_bfd->link.next, bfd_indx++)
12312 {
12313 Elf_Internal_Shdr *symtab_hdr;
12314 asection *section;
12315 Elf_Internal_Sym *local_syms = NULL;
12316
12317 if (!is_ppc64_elf (input_bfd))
12318 continue;
12319
12320 /* We'll need the symbol table in a second. */
12321 symtab_hdr = &elf_symtab_hdr (input_bfd);
12322 if (symtab_hdr->sh_info == 0)
12323 continue;
12324
12325 /* Walk over each section attached to the input bfd. */
12326 for (section = input_bfd->sections;
12327 section != NULL;
12328 section = section->next)
12329 {
12330 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
12331
12332 /* If there aren't any relocs, then there's nothing more
12333 to do. */
12334 if ((section->flags & SEC_RELOC) == 0
12335 || (section->flags & SEC_ALLOC) == 0
12336 || (section->flags & SEC_LOAD) == 0
12337 || (section->flags & SEC_CODE) == 0
12338 || section->reloc_count == 0)
12339 continue;
12340
12341 /* If this section is a link-once section that will be
12342 discarded, then don't create any stubs. */
12343 if (section->output_section == NULL
12344 || section->output_section->owner != info->output_bfd)
12345 continue;
12346
12347 /* Get the relocs. */
12348 internal_relocs
12349 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
12350 info->keep_memory);
12351 if (internal_relocs == NULL)
12352 goto error_ret_free_local;
12353
12354 /* Now examine each relocation. */
12355 irela = internal_relocs;
12356 irelaend = irela + section->reloc_count;
12357 for (; irela < irelaend; irela++)
12358 {
12359 enum elf_ppc64_reloc_type r_type;
12360 unsigned int r_indx;
12361 enum ppc_stub_type stub_type;
12362 struct ppc_stub_hash_entry *stub_entry;
12363 asection *sym_sec, *code_sec;
12364 bfd_vma sym_value, code_value;
12365 bfd_vma destination;
12366 unsigned long local_off;
12367 bfd_boolean ok_dest;
12368 struct ppc_link_hash_entry *hash;
12369 struct ppc_link_hash_entry *fdh;
12370 struct elf_link_hash_entry *h;
12371 Elf_Internal_Sym *sym;
12372 char *stub_name;
12373 const asection *id_sec;
12374 struct _opd_sec_data *opd;
12375 struct plt_entry *plt_ent;
12376
12377 r_type = ELF64_R_TYPE (irela->r_info);
12378 r_indx = ELF64_R_SYM (irela->r_info);
12379
12380 if (r_type >= R_PPC64_max)
12381 {
12382 bfd_set_error (bfd_error_bad_value);
12383 goto error_ret_free_internal;
12384 }
12385
12386 /* Only look for stubs on branch instructions. */
12387 if (r_type != R_PPC64_REL24
12388 && r_type != R_PPC64_REL14
12389 && r_type != R_PPC64_REL14_BRTAKEN
12390 && r_type != R_PPC64_REL14_BRNTAKEN)
12391 continue;
12392
12393 /* Now determine the call target, its name, value,
12394 section. */
12395 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
12396 r_indx, input_bfd))
12397 goto error_ret_free_internal;
12398 hash = (struct ppc_link_hash_entry *) h;
12399
12400 ok_dest = FALSE;
12401 fdh = NULL;
12402 sym_value = 0;
12403 if (hash == NULL)
12404 {
12405 sym_value = sym->st_value;
12406 if (sym_sec != NULL
12407 && sym_sec->output_section != NULL)
12408 ok_dest = TRUE;
12409 }
12410 else if (hash->elf.root.type == bfd_link_hash_defined
12411 || hash->elf.root.type == bfd_link_hash_defweak)
12412 {
12413 sym_value = hash->elf.root.u.def.value;
12414 if (sym_sec->output_section != NULL)
12415 ok_dest = TRUE;
12416 }
12417 else if (hash->elf.root.type == bfd_link_hash_undefweak
12418 || hash->elf.root.type == bfd_link_hash_undefined)
12419 {
12420 /* Recognise an old ABI func code entry sym, and
12421 use the func descriptor sym instead if it is
12422 defined. */
12423 if (hash->elf.root.root.string[0] == '.'
12424 && hash->oh != NULL)
12425 {
12426 fdh = ppc_follow_link (hash->oh);
12427 if (fdh->elf.root.type == bfd_link_hash_defined
12428 || fdh->elf.root.type == bfd_link_hash_defweak)
12429 {
12430 sym_sec = fdh->elf.root.u.def.section;
12431 sym_value = fdh->elf.root.u.def.value;
12432 if (sym_sec->output_section != NULL)
12433 ok_dest = TRUE;
12434 }
12435 else
12436 fdh = NULL;
12437 }
12438 }
12439 else
12440 {
12441 bfd_set_error (bfd_error_bad_value);
12442 goto error_ret_free_internal;
12443 }
12444
12445 destination = 0;
12446 local_off = 0;
12447 if (ok_dest)
12448 {
12449 sym_value += irela->r_addend;
12450 destination = (sym_value
12451 + sym_sec->output_offset
12452 + sym_sec->output_section->vma);
12453 local_off = PPC64_LOCAL_ENTRY_OFFSET (hash
12454 ? hash->elf.other
12455 : sym->st_other);
12456 }
12457
12458 code_sec = sym_sec;
12459 code_value = sym_value;
12460 opd = get_opd_info (sym_sec);
12461 if (opd != NULL)
12462 {
12463 bfd_vma dest;
12464
12465 if (hash == NULL && opd->adjust != NULL)
12466 {
12467 long adjust = opd->adjust[OPD_NDX (sym_value)];
12468 if (adjust == -1)
12469 continue;
12470 code_value += adjust;
12471 sym_value += adjust;
12472 }
12473 dest = opd_entry_value (sym_sec, sym_value,
12474 &code_sec, &code_value, FALSE);
12475 if (dest != (bfd_vma) -1)
12476 {
12477 destination = dest;
12478 if (fdh != NULL)
12479 {
12480 /* Fixup old ABI sym to point at code
12481 entry. */
12482 hash->elf.root.type = bfd_link_hash_defweak;
12483 hash->elf.root.u.def.section = code_sec;
12484 hash->elf.root.u.def.value = code_value;
12485 }
12486 }
12487 }
12488
12489 /* Determine what (if any) linker stub is needed. */
12490 plt_ent = NULL;
12491 stub_type = ppc_type_of_stub (section, irela, &hash,
12492 &plt_ent, destination,
12493 local_off);
12494
12495 if (stub_type != ppc_stub_plt_call)
12496 {
12497 /* Check whether we need a TOC adjusting stub.
12498 Since the linker pastes together pieces from
12499 different object files when creating the
12500 _init and _fini functions, it may be that a
12501 call to what looks like a local sym is in
12502 fact a call needing a TOC adjustment. */
12503 if (code_sec != NULL
12504 && code_sec->output_section != NULL
12505 && (htab->sec_info[code_sec->id].toc_off
12506 != htab->sec_info[section->id].toc_off)
12507 && (code_sec->has_toc_reloc
12508 || code_sec->makes_toc_func_call))
12509 stub_type = ppc_stub_long_branch_r2off;
12510 }
12511
12512 if (stub_type == ppc_stub_none)
12513 continue;
12514
12515 /* __tls_get_addr calls might be eliminated. */
12516 if (stub_type != ppc_stub_plt_call
12517 && hash != NULL
12518 && (hash == htab->tls_get_addr
12519 || hash == htab->tls_get_addr_fd)
12520 && section->has_tls_reloc
12521 && irela != internal_relocs)
12522 {
12523 /* Get tls info. */
12524 unsigned char *tls_mask;
12525
12526 if (!get_tls_mask (&tls_mask, NULL, NULL, &local_syms,
12527 irela - 1, input_bfd))
12528 goto error_ret_free_internal;
12529 if (*tls_mask != 0)
12530 continue;
12531 }
12532
12533 if (stub_type == ppc_stub_plt_call)
12534 {
12535 if (!htab->opd_abi
12536 && htab->params->plt_localentry0 != 0
12537 && is_elfv2_localentry0 (&hash->elf))
12538 htab->has_plt_localentry0 = 1;
12539 else if (irela + 1 < irelaend
12540 && irela[1].r_offset == irela->r_offset + 4
12541 && (ELF64_R_TYPE (irela[1].r_info)
12542 == R_PPC64_TOCSAVE))
12543 {
12544 if (!tocsave_find (htab, INSERT,
12545 &local_syms, irela + 1, input_bfd))
12546 goto error_ret_free_internal;
12547 }
12548 else
12549 stub_type = ppc_stub_plt_call_r2save;
12550 }
12551
12552 /* Support for grouping stub sections. */
12553 id_sec = htab->sec_info[section->id].u.group->link_sec;
12554
12555 /* Get the name of this stub. */
12556 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
12557 if (!stub_name)
12558 goto error_ret_free_internal;
12559
12560 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
12561 stub_name, FALSE, FALSE);
12562 if (stub_entry != NULL)
12563 {
12564 /* The proper stub has already been created. */
12565 free (stub_name);
12566 if (stub_type == ppc_stub_plt_call_r2save)
12567 stub_entry->stub_type = stub_type;
12568 continue;
12569 }
12570
12571 stub_entry = ppc_add_stub (stub_name, section, info);
12572 if (stub_entry == NULL)
12573 {
12574 free (stub_name);
12575 error_ret_free_internal:
12576 if (elf_section_data (section)->relocs == NULL)
12577 free (internal_relocs);
12578 error_ret_free_local:
12579 if (local_syms != NULL
12580 && (symtab_hdr->contents
12581 != (unsigned char *) local_syms))
12582 free (local_syms);
12583 return FALSE;
12584 }
12585
12586 stub_entry->stub_type = stub_type;
12587 if (stub_type != ppc_stub_plt_call
12588 && stub_type != ppc_stub_plt_call_r2save)
12589 {
12590 stub_entry->target_value = code_value;
12591 stub_entry->target_section = code_sec;
12592 }
12593 else
12594 {
12595 stub_entry->target_value = sym_value;
12596 stub_entry->target_section = sym_sec;
12597 }
12598 stub_entry->h = hash;
12599 stub_entry->plt_ent = plt_ent;
12600 stub_entry->other = hash ? hash->elf.other : sym->st_other;
12601
12602 if (stub_entry->h != NULL)
12603 htab->stub_globals += 1;
12604 }
12605
12606 /* We're done with the internal relocs, free them. */
12607 if (elf_section_data (section)->relocs != internal_relocs)
12608 free (internal_relocs);
12609 }
12610
12611 if (local_syms != NULL
12612 && symtab_hdr->contents != (unsigned char *) local_syms)
12613 {
12614 if (!info->keep_memory)
12615 free (local_syms);
12616 else
12617 symtab_hdr->contents = (unsigned char *) local_syms;
12618 }
12619 }
12620
12621 /* We may have added some stubs. Find out the new size of the
12622 stub sections. */
12623 for (group = htab->group; group != NULL; group = group->next)
12624 if (group->stub_sec != NULL)
12625 {
12626 asection *stub_sec = group->stub_sec;
12627
12628 if (htab->stub_iteration <= STUB_SHRINK_ITER
12629 || stub_sec->rawsize < stub_sec->size)
12630 /* Past STUB_SHRINK_ITER, rawsize is the max size seen. */
12631 stub_sec->rawsize = stub_sec->size;
12632 stub_sec->size = 0;
12633 stub_sec->reloc_count = 0;
12634 stub_sec->flags &= ~SEC_RELOC;
12635 }
12636
12637 htab->brlt->size = 0;
12638 htab->brlt->reloc_count = 0;
12639 htab->brlt->flags &= ~SEC_RELOC;
12640 if (htab->relbrlt != NULL)
12641 htab->relbrlt->size = 0;
12642
12643 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
12644
12645 for (group = htab->group; group != NULL; group = group->next)
12646 if (group->needs_save_res)
12647 group->stub_sec->size += htab->sfpr->size;
12648
12649 if (info->emitrelocations
12650 && htab->glink != NULL && htab->glink->size != 0)
12651 {
12652 htab->glink->reloc_count = 1;
12653 htab->glink->flags |= SEC_RELOC;
12654 }
12655
12656 if (htab->glink_eh_frame != NULL
12657 && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
12658 && htab->glink_eh_frame->output_section->size > 8)
12659 {
12660 size_t size = 0, align = 4;
12661
12662 for (group = htab->group; group != NULL; group = group->next)
12663 if (group->stub_sec != NULL)
12664 size += stub_eh_frame_size (group, align);
12665 if (htab->glink != NULL && htab->glink->size != 0)
12666 size += (24 + align - 1) & -align;
12667 if (size != 0)
12668 size += (sizeof (glink_eh_frame_cie) + align - 1) & -align;
12669 align = 1ul << htab->glink_eh_frame->output_section->alignment_power;
12670 size = (size + align - 1) & -align;
12671 htab->glink_eh_frame->rawsize = htab->glink_eh_frame->size;
12672 htab->glink_eh_frame->size = size;
12673 }
12674
12675 if (htab->params->plt_stub_align != 0)
12676 for (group = htab->group; group != NULL; group = group->next)
12677 if (group->stub_sec != NULL)
12678 group->stub_sec->size = ((group->stub_sec->size
12679 + (1 << htab->params->plt_stub_align) - 1)
12680 & -(1 << htab->params->plt_stub_align));
12681
12682 for (group = htab->group; group != NULL; group = group->next)
12683 if (group->stub_sec != NULL
12684 && group->stub_sec->rawsize != group->stub_sec->size
12685 && (htab->stub_iteration <= STUB_SHRINK_ITER
12686 || group->stub_sec->rawsize < group->stub_sec->size))
12687 break;
12688
12689 if (group == NULL
12690 && (htab->glink_eh_frame == NULL
12691 || htab->glink_eh_frame->rawsize == htab->glink_eh_frame->size))
12692 break;
12693
12694 /* Ask the linker to do its stuff. */
12695 (*htab->params->layout_sections_again) ();
12696 }
12697
12698 if (htab->glink_eh_frame != NULL
12699 && htab->glink_eh_frame->size != 0)
12700 {
12701 bfd_vma val;
12702 bfd_byte *p, *last_fde;
12703 size_t last_fde_len, size, align, pad;
12704 struct map_stub *group;
12705
12706 p = bfd_zalloc (htab->glink_eh_frame->owner, htab->glink_eh_frame->size);
12707 if (p == NULL)
12708 return FALSE;
12709 htab->glink_eh_frame->contents = p;
12710 last_fde = p;
12711 align = 4;
12712
12713 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
12714 /* CIE length (rewrite in case little-endian). */
12715 last_fde_len = ((sizeof (glink_eh_frame_cie) + align - 1) & -align) - 4;
12716 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
12717 p += last_fde_len + 4;
12718
12719 for (group = htab->group; group != NULL; group = group->next)
12720 if (group->stub_sec != NULL)
12721 {
12722 last_fde = p;
12723 last_fde_len = stub_eh_frame_size (group, align) - 4;
12724 /* FDE length. */
12725 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
12726 p += 4;
12727 /* CIE pointer. */
12728 val = p - htab->glink_eh_frame->contents;
12729 bfd_put_32 (htab->elf.dynobj, val, p);
12730 p += 4;
12731 /* Offset to stub section, written later. */
12732 p += 4;
12733 /* stub section size. */
12734 bfd_put_32 (htab->elf.dynobj, group->stub_sec->size, p);
12735 p += 4;
12736 /* Augmentation. */
12737 p += 1;
12738 if (group->tls_get_addr_opt_bctrl != -1u)
12739 {
12740 unsigned int to_bctrl = group->tls_get_addr_opt_bctrl / 4;
12741
12742 /* This FDE needs more than just the default.
12743 Describe __tls_get_addr_opt stub LR. */
12744 if (to_bctrl < 64)
12745 *p++ = DW_CFA_advance_loc + to_bctrl;
12746 else if (to_bctrl < 256)
12747 {
12748 *p++ = DW_CFA_advance_loc1;
12749 *p++ = to_bctrl;
12750 }
12751 else if (to_bctrl < 65536)
12752 {
12753 *p++ = DW_CFA_advance_loc2;
12754 bfd_put_16 (htab->elf.dynobj, to_bctrl, p);
12755 p += 2;
12756 }
12757 else
12758 {
12759 *p++ = DW_CFA_advance_loc4;
12760 bfd_put_32 (htab->elf.dynobj, to_bctrl, p);
12761 p += 4;
12762 }
12763 *p++ = DW_CFA_offset_extended_sf;
12764 *p++ = 65;
12765 *p++ = -(STK_LINKER (htab) / 8) & 0x7f;
12766 *p++ = DW_CFA_advance_loc + 4;
12767 *p++ = DW_CFA_restore_extended;
12768 *p++ = 65;
12769 }
12770 /* Pad. */
12771 p = last_fde + last_fde_len + 4;
12772 }
12773 if (htab->glink != NULL && htab->glink->size != 0)
12774 {
12775 last_fde = p;
12776 last_fde_len = ((24 + align - 1) & -align) - 4;
12777 /* FDE length. */
12778 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
12779 p += 4;
12780 /* CIE pointer. */
12781 val = p - htab->glink_eh_frame->contents;
12782 bfd_put_32 (htab->elf.dynobj, val, p);
12783 p += 4;
12784 /* Offset to .glink, written later. */
12785 p += 4;
12786 /* .glink size. */
12787 bfd_put_32 (htab->elf.dynobj, htab->glink->size - 8, p);
12788 p += 4;
12789 /* Augmentation. */
12790 p += 1;
12791
12792 *p++ = DW_CFA_advance_loc + 1;
12793 *p++ = DW_CFA_register;
12794 *p++ = 65;
12795 *p++ = htab->opd_abi ? 12 : 0;
12796 *p++ = DW_CFA_advance_loc + (htab->opd_abi ? 5 : 7);
12797 *p++ = DW_CFA_restore_extended;
12798 *p++ = 65;
12799 p += ((24 + align - 1) & -align) - 24;
12800 }
12801 /* Subsume any padding into the last FDE if user .eh_frame
12802 sections are aligned more than glink_eh_frame. Otherwise any
12803 zero padding will be seen as a terminator. */
12804 align = 1ul << htab->glink_eh_frame->output_section->alignment_power;
12805 size = p - htab->glink_eh_frame->contents;
12806 pad = ((size + align - 1) & -align) - size;
12807 htab->glink_eh_frame->size = size + pad;
12808 bfd_put_32 (htab->elf.dynobj, last_fde_len + pad, last_fde);
12809 }
12810
12811 maybe_strip_output (info, htab->brlt);
12812 if (htab->glink_eh_frame != NULL)
12813 maybe_strip_output (info, htab->glink_eh_frame);
12814
12815 return TRUE;
12816 }
12817
12818 /* Called after we have determined section placement. If sections
12819 move, we'll be called again. Provide a value for TOCstart. */
12820
12821 bfd_vma
12822 ppc64_elf_set_toc (struct bfd_link_info *info, bfd *obfd)
12823 {
12824 asection *s;
12825 bfd_vma TOCstart, adjust;
12826
12827 if (info != NULL)
12828 {
12829 struct elf_link_hash_entry *h;
12830 struct elf_link_hash_table *htab = elf_hash_table (info);
12831
12832 if (is_elf_hash_table (htab)
12833 && htab->hgot != NULL)
12834 h = htab->hgot;
12835 else
12836 {
12837 h = elf_link_hash_lookup (htab, ".TOC.", FALSE, FALSE, TRUE);
12838 if (is_elf_hash_table (htab))
12839 htab->hgot = h;
12840 }
12841 if (h != NULL
12842 && h->root.type == bfd_link_hash_defined
12843 && !h->root.linker_def
12844 && (!is_elf_hash_table (htab)
12845 || h->def_regular))
12846 {
12847 TOCstart = (h->root.u.def.value - TOC_BASE_OFF
12848 + h->root.u.def.section->output_offset
12849 + h->root.u.def.section->output_section->vma);
12850 _bfd_set_gp_value (obfd, TOCstart);
12851 return TOCstart;
12852 }
12853 }
12854
12855 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
12856 order. The TOC starts where the first of these sections starts. */
12857 s = bfd_get_section_by_name (obfd, ".got");
12858 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12859 s = bfd_get_section_by_name (obfd, ".toc");
12860 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12861 s = bfd_get_section_by_name (obfd, ".tocbss");
12862 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12863 s = bfd_get_section_by_name (obfd, ".plt");
12864 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12865 {
12866 /* This may happen for
12867 o references to TOC base (SYM@toc / TOC[tc0]) without a
12868 .toc directive
12869 o bad linker script
12870 o --gc-sections and empty TOC sections
12871
12872 FIXME: Warn user? */
12873
12874 /* Look for a likely section. We probably won't even be
12875 using TOCstart. */
12876 for (s = obfd->sections; s != NULL; s = s->next)
12877 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY
12878 | SEC_EXCLUDE))
12879 == (SEC_ALLOC | SEC_SMALL_DATA))
12880 break;
12881 if (s == NULL)
12882 for (s = obfd->sections; s != NULL; s = s->next)
12883 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_EXCLUDE))
12884 == (SEC_ALLOC | SEC_SMALL_DATA))
12885 break;
12886 if (s == NULL)
12887 for (s = obfd->sections; s != NULL; s = s->next)
12888 if ((s->flags & (SEC_ALLOC | SEC_READONLY | SEC_EXCLUDE))
12889 == SEC_ALLOC)
12890 break;
12891 if (s == NULL)
12892 for (s = obfd->sections; s != NULL; s = s->next)
12893 if ((s->flags & (SEC_ALLOC | SEC_EXCLUDE)) == SEC_ALLOC)
12894 break;
12895 }
12896
12897 TOCstart = 0;
12898 if (s != NULL)
12899 TOCstart = s->output_section->vma + s->output_offset;
12900
12901 /* Force alignment. */
12902 adjust = TOCstart & (TOC_BASE_ALIGN - 1);
12903 TOCstart -= adjust;
12904 _bfd_set_gp_value (obfd, TOCstart);
12905
12906 if (info != NULL && s != NULL)
12907 {
12908 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12909
12910 if (htab != NULL)
12911 {
12912 if (htab->elf.hgot != NULL)
12913 {
12914 htab->elf.hgot->root.u.def.value = TOC_BASE_OFF - adjust;
12915 htab->elf.hgot->root.u.def.section = s;
12916 }
12917 }
12918 else
12919 {
12920 struct bfd_link_hash_entry *bh = NULL;
12921 _bfd_generic_link_add_one_symbol (info, obfd, ".TOC.", BSF_GLOBAL,
12922 s, TOC_BASE_OFF - adjust,
12923 NULL, FALSE, FALSE, &bh);
12924 }
12925 }
12926 return TOCstart;
12927 }
12928
12929 /* Called via elf_link_hash_traverse from ppc64_elf_build_stubs to
12930 write out any global entry stubs. */
12931
12932 static bfd_boolean
12933 build_global_entry_stubs (struct elf_link_hash_entry *h, void *inf)
12934 {
12935 struct bfd_link_info *info;
12936 struct ppc_link_hash_table *htab;
12937 struct plt_entry *pent;
12938 asection *s;
12939
12940 if (h->root.type == bfd_link_hash_indirect)
12941 return TRUE;
12942
12943 if (!h->pointer_equality_needed)
12944 return TRUE;
12945
12946 if (h->def_regular)
12947 return TRUE;
12948
12949 info = inf;
12950 htab = ppc_hash_table (info);
12951 if (htab == NULL)
12952 return FALSE;
12953
12954 s = htab->glink;
12955 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
12956 if (pent->plt.offset != (bfd_vma) -1
12957 && pent->addend == 0)
12958 {
12959 bfd_byte *p;
12960 asection *plt;
12961 bfd_vma off;
12962
12963 p = s->contents + h->root.u.def.value;
12964 plt = htab->elf.splt;
12965 if (!htab->elf.dynamic_sections_created
12966 || h->dynindx == -1)
12967 plt = htab->elf.iplt;
12968 off = pent->plt.offset + plt->output_offset + plt->output_section->vma;
12969 off -= h->root.u.def.value + s->output_offset + s->output_section->vma;
12970
12971 if (off + 0x80008000 > 0xffffffff || (off & 3) != 0)
12972 {
12973 info->callbacks->einfo
12974 (_("%P: linkage table error against `%T'\n"),
12975 h->root.root.string);
12976 bfd_set_error (bfd_error_bad_value);
12977 htab->stub_error = TRUE;
12978 }
12979
12980 htab->stub_count[ppc_stub_global_entry - 1] += 1;
12981 if (htab->params->emit_stub_syms)
12982 {
12983 size_t len = strlen (h->root.root.string);
12984 char *name = bfd_malloc (sizeof "12345678.global_entry." + len);
12985
12986 if (name == NULL)
12987 return FALSE;
12988
12989 sprintf (name, "%08x.global_entry.%s", s->id, h->root.root.string);
12990 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
12991 if (h == NULL)
12992 return FALSE;
12993 if (h->root.type == bfd_link_hash_new)
12994 {
12995 h->root.type = bfd_link_hash_defined;
12996 h->root.u.def.section = s;
12997 h->root.u.def.value = p - s->contents;
12998 h->ref_regular = 1;
12999 h->def_regular = 1;
13000 h->ref_regular_nonweak = 1;
13001 h->forced_local = 1;
13002 h->non_elf = 0;
13003 h->root.linker_def = 1;
13004 }
13005 }
13006
13007 if (PPC_HA (off) != 0)
13008 {
13009 bfd_put_32 (s->owner, ADDIS_R12_R12 | PPC_HA (off), p);
13010 p += 4;
13011 }
13012 bfd_put_32 (s->owner, LD_R12_0R12 | PPC_LO (off), p);
13013 p += 4;
13014 bfd_put_32 (s->owner, MTCTR_R12, p);
13015 p += 4;
13016 bfd_put_32 (s->owner, BCTR, p);
13017 break;
13018 }
13019 return TRUE;
13020 }
13021
13022 /* Build all the stubs associated with the current output file.
13023 The stubs are kept in a hash table attached to the main linker
13024 hash table. This function is called via gldelf64ppc_finish. */
13025
13026 bfd_boolean
13027 ppc64_elf_build_stubs (struct bfd_link_info *info,
13028 char **stats)
13029 {
13030 struct ppc_link_hash_table *htab = ppc_hash_table (info);
13031 struct map_stub *group;
13032 asection *stub_sec;
13033 bfd_byte *p;
13034 int stub_sec_count = 0;
13035
13036 if (htab == NULL)
13037 return FALSE;
13038
13039 /* Allocate memory to hold the linker stubs. */
13040 for (group = htab->group; group != NULL; group = group->next)
13041 if ((stub_sec = group->stub_sec) != NULL
13042 && stub_sec->size != 0)
13043 {
13044 stub_sec->contents = bfd_zalloc (htab->params->stub_bfd, stub_sec->size);
13045 if (stub_sec->contents == NULL)
13046 return FALSE;
13047 stub_sec->size = 0;
13048 }
13049
13050 if (htab->glink != NULL && htab->glink->size != 0)
13051 {
13052 unsigned int indx;
13053 bfd_vma plt0;
13054
13055 /* Build the .glink plt call stub. */
13056 if (htab->params->emit_stub_syms)
13057 {
13058 struct elf_link_hash_entry *h;
13059 h = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
13060 TRUE, FALSE, FALSE);
13061 if (h == NULL)
13062 return FALSE;
13063 if (h->root.type == bfd_link_hash_new)
13064 {
13065 h->root.type = bfd_link_hash_defined;
13066 h->root.u.def.section = htab->glink;
13067 h->root.u.def.value = 8;
13068 h->ref_regular = 1;
13069 h->def_regular = 1;
13070 h->ref_regular_nonweak = 1;
13071 h->forced_local = 1;
13072 h->non_elf = 0;
13073 h->root.linker_def = 1;
13074 }
13075 }
13076 plt0 = (htab->elf.splt->output_section->vma
13077 + htab->elf.splt->output_offset
13078 - 16);
13079 if (info->emitrelocations)
13080 {
13081 Elf_Internal_Rela *r = get_relocs (htab->glink, 1);
13082 if (r == NULL)
13083 return FALSE;
13084 r->r_offset = (htab->glink->output_offset
13085 + htab->glink->output_section->vma);
13086 r->r_info = ELF64_R_INFO (0, R_PPC64_REL64);
13087 r->r_addend = plt0;
13088 }
13089 p = htab->glink->contents;
13090 plt0 -= htab->glink->output_section->vma + htab->glink->output_offset;
13091 bfd_put_64 (htab->glink->owner, plt0, p);
13092 p += 8;
13093 if (htab->opd_abi)
13094 {
13095 bfd_put_32 (htab->glink->owner, MFLR_R12, p);
13096 p += 4;
13097 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
13098 p += 4;
13099 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
13100 p += 4;
13101 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | (-16 & 0xfffc), p);
13102 p += 4;
13103 bfd_put_32 (htab->glink->owner, MTLR_R12, p);
13104 p += 4;
13105 bfd_put_32 (htab->glink->owner, ADD_R11_R2_R11, p);
13106 p += 4;
13107 bfd_put_32 (htab->glink->owner, LD_R12_0R11, p);
13108 p += 4;
13109 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | 8, p);
13110 p += 4;
13111 bfd_put_32 (htab->glink->owner, MTCTR_R12, p);
13112 p += 4;
13113 bfd_put_32 (htab->glink->owner, LD_R11_0R11 | 16, p);
13114 p += 4;
13115 }
13116 else
13117 {
13118 bfd_put_32 (htab->glink->owner, MFLR_R0, p);
13119 p += 4;
13120 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
13121 p += 4;
13122 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
13123 p += 4;
13124 bfd_put_32 (htab->glink->owner, STD_R2_0R1 + 24, p);
13125 p += 4;
13126 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | (-16 & 0xfffc), p);
13127 p += 4;
13128 bfd_put_32 (htab->glink->owner, MTLR_R0, p);
13129 p += 4;
13130 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
13131 p += 4;
13132 bfd_put_32 (htab->glink->owner, ADD_R11_R2_R11, p);
13133 p += 4;
13134 bfd_put_32 (htab->glink->owner, ADDI_R0_R12 | (-48 & 0xffff), p);
13135 p += 4;
13136 bfd_put_32 (htab->glink->owner, LD_R12_0R11, p);
13137 p += 4;
13138 bfd_put_32 (htab->glink->owner, SRDI_R0_R0_2, p);
13139 p += 4;
13140 bfd_put_32 (htab->glink->owner, MTCTR_R12, p);
13141 p += 4;
13142 bfd_put_32 (htab->glink->owner, LD_R11_0R11 | 8, p);
13143 p += 4;
13144 }
13145 bfd_put_32 (htab->glink->owner, BCTR, p);
13146 p += 4;
13147 while (p - htab->glink->contents < GLINK_CALL_STUB_SIZE)
13148 {
13149 bfd_put_32 (htab->glink->owner, NOP, p);
13150 p += 4;
13151 }
13152
13153 /* Build the .glink lazy link call stubs. */
13154 indx = 0;
13155 while (p < htab->glink->contents + htab->glink->rawsize)
13156 {
13157 if (htab->opd_abi)
13158 {
13159 if (indx < 0x8000)
13160 {
13161 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
13162 p += 4;
13163 }
13164 else
13165 {
13166 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
13167 p += 4;
13168 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx),
13169 p);
13170 p += 4;
13171 }
13172 }
13173 bfd_put_32 (htab->glink->owner,
13174 B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p);
13175 indx++;
13176 p += 4;
13177 }
13178
13179 /* Build .glink global entry stubs. */
13180 if (htab->glink->size > htab->glink->rawsize)
13181 elf_link_hash_traverse (&htab->elf, build_global_entry_stubs, info);
13182 }
13183
13184 if (htab->brlt != NULL && htab->brlt->size != 0)
13185 {
13186 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
13187 htab->brlt->size);
13188 if (htab->brlt->contents == NULL)
13189 return FALSE;
13190 }
13191 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
13192 {
13193 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
13194 htab->relbrlt->size);
13195 if (htab->relbrlt->contents == NULL)
13196 return FALSE;
13197 }
13198
13199 /* Build the stubs as directed by the stub hash table. */
13200 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
13201
13202 for (group = htab->group; group != NULL; group = group->next)
13203 if (group->needs_save_res)
13204 {
13205 stub_sec = group->stub_sec;
13206 memcpy (stub_sec->contents + stub_sec->size, htab->sfpr->contents,
13207 htab->sfpr->size);
13208 if (htab->params->emit_stub_syms)
13209 {
13210 unsigned int i;
13211
13212 for (i = 0; i < ARRAY_SIZE (save_res_funcs); i++)
13213 if (!sfpr_define (info, &save_res_funcs[i], stub_sec))
13214 return FALSE;
13215 }
13216 stub_sec->size += htab->sfpr->size;
13217 }
13218
13219 if (htab->relbrlt != NULL)
13220 htab->relbrlt->reloc_count = 0;
13221
13222 if (htab->params->plt_stub_align != 0)
13223 for (group = htab->group; group != NULL; group = group->next)
13224 if ((stub_sec = group->stub_sec) != NULL)
13225 stub_sec->size = ((stub_sec->size
13226 + (1 << htab->params->plt_stub_align) - 1)
13227 & -(1 << htab->params->plt_stub_align));
13228
13229 for (group = htab->group; group != NULL; group = group->next)
13230 if ((stub_sec = group->stub_sec) != NULL)
13231 {
13232 stub_sec_count += 1;
13233 if (stub_sec->rawsize != stub_sec->size
13234 && (htab->stub_iteration <= STUB_SHRINK_ITER
13235 || stub_sec->rawsize < stub_sec->size))
13236 break;
13237 }
13238
13239 if (group != NULL)
13240 {
13241 htab->stub_error = TRUE;
13242 info->callbacks->einfo (_("%P: stubs don't match calculated size\n"));
13243 }
13244
13245 if (htab->stub_error)
13246 return FALSE;
13247
13248 if (stats != NULL)
13249 {
13250 size_t len;
13251 *stats = bfd_malloc (500);
13252 if (*stats == NULL)
13253 return FALSE;
13254
13255 len = sprintf (*stats,
13256 ngettext ("linker stubs in %u group\n",
13257 "linker stubs in %u groups\n",
13258 stub_sec_count),
13259 stub_sec_count);
13260 sprintf (*stats + len, _(" branch %lu\n"
13261 " toc adjust %lu\n"
13262 " long branch %lu\n"
13263 " long toc adj %lu\n"
13264 " plt call %lu\n"
13265 " plt call toc %lu\n"
13266 " global entry %lu"),
13267 htab->stub_count[ppc_stub_long_branch - 1],
13268 htab->stub_count[ppc_stub_long_branch_r2off - 1],
13269 htab->stub_count[ppc_stub_plt_branch - 1],
13270 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
13271 htab->stub_count[ppc_stub_plt_call - 1],
13272 htab->stub_count[ppc_stub_plt_call_r2save - 1],
13273 htab->stub_count[ppc_stub_global_entry - 1]);
13274 }
13275 return TRUE;
13276 }
13277
13278 /* What to do when ld finds relocations against symbols defined in
13279 discarded sections. */
13280
13281 static unsigned int
13282 ppc64_elf_action_discarded (asection *sec)
13283 {
13284 if (strcmp (".opd", sec->name) == 0)
13285 return 0;
13286
13287 if (strcmp (".toc", sec->name) == 0)
13288 return 0;
13289
13290 if (strcmp (".toc1", sec->name) == 0)
13291 return 0;
13292
13293 return _bfd_elf_default_action_discarded (sec);
13294 }
13295
13296 /* The RELOCATE_SECTION function is called by the ELF backend linker
13297 to handle the relocations for a section.
13298
13299 The relocs are always passed as Rela structures; if the section
13300 actually uses Rel structures, the r_addend field will always be
13301 zero.
13302
13303 This function is responsible for adjust the section contents as
13304 necessary, and (if using Rela relocs and generating a
13305 relocatable output file) adjusting the reloc addend as
13306 necessary.
13307
13308 This function does not have to worry about setting the reloc
13309 address or the reloc symbol index.
13310
13311 LOCAL_SYMS is a pointer to the swapped in local symbols.
13312
13313 LOCAL_SECTIONS is an array giving the section in the input file
13314 corresponding to the st_shndx field of each local symbol.
13315
13316 The global hash table entry for the global symbols can be found
13317 via elf_sym_hashes (input_bfd).
13318
13319 When generating relocatable output, this function must handle
13320 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
13321 going to be the section symbol corresponding to the output
13322 section, which means that the addend must be adjusted
13323 accordingly. */
13324
13325 static bfd_boolean
13326 ppc64_elf_relocate_section (bfd *output_bfd,
13327 struct bfd_link_info *info,
13328 bfd *input_bfd,
13329 asection *input_section,
13330 bfd_byte *contents,
13331 Elf_Internal_Rela *relocs,
13332 Elf_Internal_Sym *local_syms,
13333 asection **local_sections)
13334 {
13335 struct ppc_link_hash_table *htab;
13336 Elf_Internal_Shdr *symtab_hdr;
13337 struct elf_link_hash_entry **sym_hashes;
13338 Elf_Internal_Rela *rel;
13339 Elf_Internal_Rela *wrel;
13340 Elf_Internal_Rela *relend;
13341 Elf_Internal_Rela outrel;
13342 bfd_byte *loc;
13343 struct got_entry **local_got_ents;
13344 bfd_vma TOCstart;
13345 bfd_boolean ret = TRUE;
13346 bfd_boolean is_opd;
13347 /* Assume 'at' branch hints. */
13348 bfd_boolean is_isa_v2 = TRUE;
13349 bfd_vma d_offset = (bfd_big_endian (input_bfd) ? 2 : 0);
13350
13351 /* Initialize howto table if needed. */
13352 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
13353 ppc_howto_init ();
13354
13355 htab = ppc_hash_table (info);
13356 if (htab == NULL)
13357 return FALSE;
13358
13359 /* Don't relocate stub sections. */
13360 if (input_section->owner == htab->params->stub_bfd)
13361 return TRUE;
13362
13363 BFD_ASSERT (is_ppc64_elf (input_bfd));
13364
13365 local_got_ents = elf_local_got_ents (input_bfd);
13366 TOCstart = elf_gp (output_bfd);
13367 symtab_hdr = &elf_symtab_hdr (input_bfd);
13368 sym_hashes = elf_sym_hashes (input_bfd);
13369 is_opd = ppc64_elf_section_data (input_section)->sec_type == sec_opd;
13370
13371 rel = wrel = relocs;
13372 relend = relocs + input_section->reloc_count;
13373 for (; rel < relend; wrel++, rel++)
13374 {
13375 enum elf_ppc64_reloc_type r_type;
13376 bfd_vma addend;
13377 bfd_reloc_status_type r;
13378 Elf_Internal_Sym *sym;
13379 asection *sec;
13380 struct elf_link_hash_entry *h_elf;
13381 struct ppc_link_hash_entry *h;
13382 struct ppc_link_hash_entry *fdh;
13383 const char *sym_name;
13384 unsigned long r_symndx, toc_symndx;
13385 bfd_vma toc_addend;
13386 unsigned char tls_mask, tls_gd, tls_type;
13387 unsigned char sym_type;
13388 bfd_vma relocation;
13389 bfd_boolean unresolved_reloc;
13390 bfd_boolean warned;
13391 enum { DEST_NORMAL, DEST_OPD, DEST_STUB } reloc_dest;
13392 unsigned int insn;
13393 unsigned int mask;
13394 struct ppc_stub_hash_entry *stub_entry;
13395 bfd_vma max_br_offset;
13396 bfd_vma from;
13397 Elf_Internal_Rela orig_rel;
13398 reloc_howto_type *howto;
13399 struct reloc_howto_struct alt_howto;
13400
13401 again:
13402 orig_rel = *rel;
13403
13404 r_type = ELF64_R_TYPE (rel->r_info);
13405 r_symndx = ELF64_R_SYM (rel->r_info);
13406
13407 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
13408 symbol of the previous ADDR64 reloc. The symbol gives us the
13409 proper TOC base to use. */
13410 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
13411 && wrel != relocs
13412 && ELF64_R_TYPE (wrel[-1].r_info) == R_PPC64_ADDR64
13413 && is_opd)
13414 r_symndx = ELF64_R_SYM (wrel[-1].r_info);
13415
13416 sym = NULL;
13417 sec = NULL;
13418 h_elf = NULL;
13419 sym_name = NULL;
13420 unresolved_reloc = FALSE;
13421 warned = FALSE;
13422
13423 if (r_symndx < symtab_hdr->sh_info)
13424 {
13425 /* It's a local symbol. */
13426 struct _opd_sec_data *opd;
13427
13428 sym = local_syms + r_symndx;
13429 sec = local_sections[r_symndx];
13430 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
13431 sym_type = ELF64_ST_TYPE (sym->st_info);
13432 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
13433 opd = get_opd_info (sec);
13434 if (opd != NULL && opd->adjust != NULL)
13435 {
13436 long adjust = opd->adjust[OPD_NDX (sym->st_value
13437 + rel->r_addend)];
13438 if (adjust == -1)
13439 relocation = 0;
13440 else
13441 {
13442 /* If this is a relocation against the opd section sym
13443 and we have edited .opd, adjust the reloc addend so
13444 that ld -r and ld --emit-relocs output is correct.
13445 If it is a reloc against some other .opd symbol,
13446 then the symbol value will be adjusted later. */
13447 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
13448 rel->r_addend += adjust;
13449 else
13450 relocation += adjust;
13451 }
13452 }
13453 }
13454 else
13455 {
13456 bfd_boolean ignored;
13457
13458 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
13459 r_symndx, symtab_hdr, sym_hashes,
13460 h_elf, sec, relocation,
13461 unresolved_reloc, warned, ignored);
13462 sym_name = h_elf->root.root.string;
13463 sym_type = h_elf->type;
13464 if (sec != NULL
13465 && sec->owner == output_bfd
13466 && strcmp (sec->name, ".opd") == 0)
13467 {
13468 /* This is a symbol defined in a linker script. All
13469 such are defined in output sections, even those
13470 defined by simple assignment from a symbol defined in
13471 an input section. Transfer the symbol to an
13472 appropriate input .opd section, so that a branch to
13473 this symbol will be mapped to the location specified
13474 by the opd entry. */
13475 struct bfd_link_order *lo;
13476 for (lo = sec->map_head.link_order; lo != NULL; lo = lo->next)
13477 if (lo->type == bfd_indirect_link_order)
13478 {
13479 asection *isec = lo->u.indirect.section;
13480 if (h_elf->root.u.def.value >= isec->output_offset
13481 && h_elf->root.u.def.value < (isec->output_offset
13482 + isec->size))
13483 {
13484 h_elf->root.u.def.value -= isec->output_offset;
13485 h_elf->root.u.def.section = isec;
13486 sec = isec;
13487 break;
13488 }
13489 }
13490 }
13491 }
13492 h = (struct ppc_link_hash_entry *) h_elf;
13493
13494 if (sec != NULL && discarded_section (sec))
13495 {
13496 _bfd_clear_contents (ppc64_elf_howto_table[r_type],
13497 input_bfd, input_section,
13498 contents + rel->r_offset);
13499 wrel->r_offset = rel->r_offset;
13500 wrel->r_info = 0;
13501 wrel->r_addend = 0;
13502
13503 /* For ld -r, remove relocations in debug sections against
13504 symbols defined in discarded sections. Not done for
13505 non-debug to preserve relocs in .eh_frame which the
13506 eh_frame editing code expects to be present. */
13507 if (bfd_link_relocatable (info)
13508 && (input_section->flags & SEC_DEBUGGING))
13509 wrel--;
13510
13511 continue;
13512 }
13513
13514 if (bfd_link_relocatable (info))
13515 goto copy_reloc;
13516
13517 if (h != NULL && &h->elf == htab->elf.hgot)
13518 {
13519 relocation = TOCstart + htab->sec_info[input_section->id].toc_off;
13520 sec = bfd_abs_section_ptr;
13521 unresolved_reloc = FALSE;
13522 }
13523
13524 /* TLS optimizations. Replace instruction sequences and relocs
13525 based on information we collected in tls_optimize. We edit
13526 RELOCS so that --emit-relocs will output something sensible
13527 for the final instruction stream. */
13528 tls_mask = 0;
13529 tls_gd = 0;
13530 toc_symndx = 0;
13531 if (h != NULL)
13532 tls_mask = h->tls_mask;
13533 else if (local_got_ents != NULL)
13534 {
13535 struct plt_entry **local_plt = (struct plt_entry **)
13536 (local_got_ents + symtab_hdr->sh_info);
13537 unsigned char *lgot_masks = (unsigned char *)
13538 (local_plt + symtab_hdr->sh_info);
13539 tls_mask = lgot_masks[r_symndx];
13540 }
13541 if (tls_mask == 0
13542 && (r_type == R_PPC64_TLS
13543 || r_type == R_PPC64_TLSGD
13544 || r_type == R_PPC64_TLSLD))
13545 {
13546 /* Check for toc tls entries. */
13547 unsigned char *toc_tls;
13548
13549 if (!get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
13550 &local_syms, rel, input_bfd))
13551 return FALSE;
13552
13553 if (toc_tls)
13554 tls_mask = *toc_tls;
13555 }
13556
13557 /* Check that tls relocs are used with tls syms, and non-tls
13558 relocs are used with non-tls syms. */
13559 if (r_symndx != STN_UNDEF
13560 && r_type != R_PPC64_NONE
13561 && (h == NULL
13562 || h->elf.root.type == bfd_link_hash_defined
13563 || h->elf.root.type == bfd_link_hash_defweak)
13564 && (IS_PPC64_TLS_RELOC (r_type)
13565 != (sym_type == STT_TLS
13566 || (sym_type == STT_SECTION
13567 && (sec->flags & SEC_THREAD_LOCAL) != 0))))
13568 {
13569 if (tls_mask != 0
13570 && (r_type == R_PPC64_TLS
13571 || r_type == R_PPC64_TLSGD
13572 || r_type == R_PPC64_TLSLD))
13573 /* R_PPC64_TLS is OK against a symbol in the TOC. */
13574 ;
13575 else
13576 info->callbacks->einfo
13577 (!IS_PPC64_TLS_RELOC (r_type)
13578 /* xgettext:c-format */
13579 ? _("%H: %s used with TLS symbol `%T'\n")
13580 /* xgettext:c-format */
13581 : _("%H: %s used with non-TLS symbol `%T'\n"),
13582 input_bfd, input_section, rel->r_offset,
13583 ppc64_elf_howto_table[r_type]->name,
13584 sym_name);
13585 }
13586
13587 /* Ensure reloc mapping code below stays sane. */
13588 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
13589 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
13590 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
13591 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
13592 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
13593 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
13594 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
13595 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
13596 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
13597 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
13598 abort ();
13599
13600 switch (r_type)
13601 {
13602 default:
13603 break;
13604
13605 case R_PPC64_LO_DS_OPT:
13606 insn = bfd_get_32 (input_bfd, contents + rel->r_offset - d_offset);
13607 if ((insn & (0x3f << 26)) != 58u << 26)
13608 abort ();
13609 insn += (14u << 26) - (58u << 26);
13610 bfd_put_32 (input_bfd, insn, contents + rel->r_offset - d_offset);
13611 r_type = R_PPC64_TOC16_LO;
13612 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13613 break;
13614
13615 case R_PPC64_TOC16:
13616 case R_PPC64_TOC16_LO:
13617 case R_PPC64_TOC16_DS:
13618 case R_PPC64_TOC16_LO_DS:
13619 {
13620 /* Check for toc tls entries. */
13621 unsigned char *toc_tls;
13622 int retval;
13623
13624 retval = get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
13625 &local_syms, rel, input_bfd);
13626 if (retval == 0)
13627 return FALSE;
13628
13629 if (toc_tls)
13630 {
13631 tls_mask = *toc_tls;
13632 if (r_type == R_PPC64_TOC16_DS
13633 || r_type == R_PPC64_TOC16_LO_DS)
13634 {
13635 if (tls_mask != 0
13636 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
13637 goto toctprel;
13638 }
13639 else
13640 {
13641 /* If we found a GD reloc pair, then we might be
13642 doing a GD->IE transition. */
13643 if (retval == 2)
13644 {
13645 tls_gd = TLS_TPRELGD;
13646 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13647 goto tls_ldgd_opt;
13648 }
13649 else if (retval == 3)
13650 {
13651 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13652 goto tls_ldgd_opt;
13653 }
13654 }
13655 }
13656 }
13657 break;
13658
13659 case R_PPC64_GOT_TPREL16_HI:
13660 case R_PPC64_GOT_TPREL16_HA:
13661 if (tls_mask != 0
13662 && (tls_mask & TLS_TPREL) == 0)
13663 {
13664 rel->r_offset -= d_offset;
13665 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
13666 r_type = R_PPC64_NONE;
13667 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13668 }
13669 break;
13670
13671 case R_PPC64_GOT_TPREL16_DS:
13672 case R_PPC64_GOT_TPREL16_LO_DS:
13673 if (tls_mask != 0
13674 && (tls_mask & TLS_TPREL) == 0)
13675 {
13676 toctprel:
13677 insn = bfd_get_32 (input_bfd,
13678 contents + rel->r_offset - d_offset);
13679 insn &= 31 << 21;
13680 insn |= 0x3c0d0000; /* addis 0,13,0 */
13681 bfd_put_32 (input_bfd, insn,
13682 contents + rel->r_offset - d_offset);
13683 r_type = R_PPC64_TPREL16_HA;
13684 if (toc_symndx != 0)
13685 {
13686 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
13687 rel->r_addend = toc_addend;
13688 /* We changed the symbol. Start over in order to
13689 get h, sym, sec etc. right. */
13690 goto again;
13691 }
13692 else
13693 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13694 }
13695 break;
13696
13697 case R_PPC64_TLS:
13698 if (tls_mask != 0
13699 && (tls_mask & TLS_TPREL) == 0)
13700 {
13701 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
13702 insn = _bfd_elf_ppc_at_tls_transform (insn, 13);
13703 if (insn == 0)
13704 abort ();
13705 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
13706 /* Was PPC64_TLS which sits on insn boundary, now
13707 PPC64_TPREL16_LO which is at low-order half-word. */
13708 rel->r_offset += d_offset;
13709 r_type = R_PPC64_TPREL16_LO;
13710 if (toc_symndx != 0)
13711 {
13712 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
13713 rel->r_addend = toc_addend;
13714 /* We changed the symbol. Start over in order to
13715 get h, sym, sec etc. right. */
13716 goto again;
13717 }
13718 else
13719 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13720 }
13721 break;
13722
13723 case R_PPC64_GOT_TLSGD16_HI:
13724 case R_PPC64_GOT_TLSGD16_HA:
13725 tls_gd = TLS_TPRELGD;
13726 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13727 goto tls_gdld_hi;
13728 break;
13729
13730 case R_PPC64_GOT_TLSLD16_HI:
13731 case R_PPC64_GOT_TLSLD16_HA:
13732 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13733 {
13734 tls_gdld_hi:
13735 if ((tls_mask & tls_gd) != 0)
13736 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
13737 + R_PPC64_GOT_TPREL16_DS);
13738 else
13739 {
13740 rel->r_offset -= d_offset;
13741 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
13742 r_type = R_PPC64_NONE;
13743 }
13744 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13745 }
13746 break;
13747
13748 case R_PPC64_GOT_TLSGD16:
13749 case R_PPC64_GOT_TLSGD16_LO:
13750 tls_gd = TLS_TPRELGD;
13751 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13752 goto tls_ldgd_opt;
13753 break;
13754
13755 case R_PPC64_GOT_TLSLD16:
13756 case R_PPC64_GOT_TLSLD16_LO:
13757 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13758 {
13759 unsigned int insn1, insn2;
13760 bfd_vma offset;
13761
13762 tls_ldgd_opt:
13763 offset = (bfd_vma) -1;
13764 /* If not using the newer R_PPC64_TLSGD/LD to mark
13765 __tls_get_addr calls, we must trust that the call
13766 stays with its arg setup insns, ie. that the next
13767 reloc is the __tls_get_addr call associated with
13768 the current reloc. Edit both insns. */
13769 if (input_section->has_tls_get_addr_call
13770 && rel + 1 < relend
13771 && branch_reloc_hash_match (input_bfd, rel + 1,
13772 htab->tls_get_addr,
13773 htab->tls_get_addr_fd))
13774 offset = rel[1].r_offset;
13775 /* We read the low GOT_TLS (or TOC16) insn because we
13776 need to keep the destination reg. It may be
13777 something other than the usual r3, and moved to r3
13778 before the call by intervening code. */
13779 insn1 = bfd_get_32 (input_bfd,
13780 contents + rel->r_offset - d_offset);
13781 if ((tls_mask & tls_gd) != 0)
13782 {
13783 /* IE */
13784 insn1 &= (0x1f << 21) | (0x1f << 16);
13785 insn1 |= 58 << 26; /* ld */
13786 insn2 = 0x7c636a14; /* add 3,3,13 */
13787 if (offset != (bfd_vma) -1)
13788 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13789 if ((tls_mask & TLS_EXPLICIT) == 0)
13790 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
13791 + R_PPC64_GOT_TPREL16_DS);
13792 else
13793 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
13794 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13795 }
13796 else
13797 {
13798 /* LE */
13799 insn1 &= 0x1f << 21;
13800 insn1 |= 0x3c0d0000; /* addis r,13,0 */
13801 insn2 = 0x38630000; /* addi 3,3,0 */
13802 if (tls_gd == 0)
13803 {
13804 /* Was an LD reloc. */
13805 if (toc_symndx)
13806 sec = local_sections[toc_symndx];
13807 for (r_symndx = 0;
13808 r_symndx < symtab_hdr->sh_info;
13809 r_symndx++)
13810 if (local_sections[r_symndx] == sec)
13811 break;
13812 if (r_symndx >= symtab_hdr->sh_info)
13813 r_symndx = STN_UNDEF;
13814 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
13815 if (r_symndx != STN_UNDEF)
13816 rel->r_addend -= (local_syms[r_symndx].st_value
13817 + sec->output_offset
13818 + sec->output_section->vma);
13819 }
13820 else if (toc_symndx != 0)
13821 {
13822 r_symndx = toc_symndx;
13823 rel->r_addend = toc_addend;
13824 }
13825 r_type = R_PPC64_TPREL16_HA;
13826 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13827 if (offset != (bfd_vma) -1)
13828 {
13829 rel[1].r_info = ELF64_R_INFO (r_symndx,
13830 R_PPC64_TPREL16_LO);
13831 rel[1].r_offset = offset + d_offset;
13832 rel[1].r_addend = rel->r_addend;
13833 }
13834 }
13835 bfd_put_32 (input_bfd, insn1,
13836 contents + rel->r_offset - d_offset);
13837 if (offset != (bfd_vma) -1)
13838 bfd_put_32 (input_bfd, insn2, contents + offset);
13839 if ((tls_mask & tls_gd) == 0
13840 && (tls_gd == 0 || toc_symndx != 0))
13841 {
13842 /* We changed the symbol. Start over in order
13843 to get h, sym, sec etc. right. */
13844 goto again;
13845 }
13846 }
13847 break;
13848
13849 case R_PPC64_TLSGD:
13850 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13851 {
13852 unsigned int insn2;
13853 bfd_vma offset = rel->r_offset;
13854
13855 if ((tls_mask & TLS_TPRELGD) != 0)
13856 {
13857 /* IE */
13858 r_type = R_PPC64_NONE;
13859 insn2 = 0x7c636a14; /* add 3,3,13 */
13860 }
13861 else
13862 {
13863 /* LE */
13864 if (toc_symndx != 0)
13865 {
13866 r_symndx = toc_symndx;
13867 rel->r_addend = toc_addend;
13868 }
13869 r_type = R_PPC64_TPREL16_LO;
13870 rel->r_offset = offset + d_offset;
13871 insn2 = 0x38630000; /* addi 3,3,0 */
13872 }
13873 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13874 /* Zap the reloc on the _tls_get_addr call too. */
13875 BFD_ASSERT (offset == rel[1].r_offset);
13876 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13877 bfd_put_32 (input_bfd, insn2, contents + offset);
13878 if ((tls_mask & TLS_TPRELGD) == 0 && toc_symndx != 0)
13879 goto again;
13880 }
13881 break;
13882
13883 case R_PPC64_TLSLD:
13884 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13885 {
13886 unsigned int insn2;
13887 bfd_vma offset = rel->r_offset;
13888
13889 if (toc_symndx)
13890 sec = local_sections[toc_symndx];
13891 for (r_symndx = 0;
13892 r_symndx < symtab_hdr->sh_info;
13893 r_symndx++)
13894 if (local_sections[r_symndx] == sec)
13895 break;
13896 if (r_symndx >= symtab_hdr->sh_info)
13897 r_symndx = STN_UNDEF;
13898 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
13899 if (r_symndx != STN_UNDEF)
13900 rel->r_addend -= (local_syms[r_symndx].st_value
13901 + sec->output_offset
13902 + sec->output_section->vma);
13903
13904 r_type = R_PPC64_TPREL16_LO;
13905 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13906 rel->r_offset = offset + d_offset;
13907 /* Zap the reloc on the _tls_get_addr call too. */
13908 BFD_ASSERT (offset == rel[1].r_offset);
13909 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13910 insn2 = 0x38630000; /* addi 3,3,0 */
13911 bfd_put_32 (input_bfd, insn2, contents + offset);
13912 goto again;
13913 }
13914 break;
13915
13916 case R_PPC64_DTPMOD64:
13917 if (rel + 1 < relend
13918 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
13919 && rel[1].r_offset == rel->r_offset + 8)
13920 {
13921 if ((tls_mask & TLS_GD) == 0)
13922 {
13923 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
13924 if ((tls_mask & TLS_TPRELGD) != 0)
13925 r_type = R_PPC64_TPREL64;
13926 else
13927 {
13928 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
13929 r_type = R_PPC64_NONE;
13930 }
13931 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13932 }
13933 }
13934 else
13935 {
13936 if ((tls_mask & TLS_LD) == 0)
13937 {
13938 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
13939 r_type = R_PPC64_NONE;
13940 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13941 }
13942 }
13943 break;
13944
13945 case R_PPC64_TPREL64:
13946 if ((tls_mask & TLS_TPREL) == 0)
13947 {
13948 r_type = R_PPC64_NONE;
13949 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13950 }
13951 break;
13952
13953 case R_PPC64_ENTRY:
13954 relocation = TOCstart + htab->sec_info[input_section->id].toc_off;
13955 if (!bfd_link_pic (info)
13956 && !info->traditional_format
13957 && relocation + 0x80008000 <= 0xffffffff)
13958 {
13959 unsigned int insn1, insn2;
13960
13961 insn1 = bfd_get_32 (input_bfd, contents + rel->r_offset);
13962 insn2 = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
13963 if ((insn1 & ~0xfffc) == LD_R2_0R12
13964 && insn2 == ADD_R2_R2_R12)
13965 {
13966 bfd_put_32 (input_bfd,
13967 LIS_R2 + PPC_HA (relocation),
13968 contents + rel->r_offset);
13969 bfd_put_32 (input_bfd,
13970 ADDI_R2_R2 + PPC_LO (relocation),
13971 contents + rel->r_offset + 4);
13972 }
13973 }
13974 else
13975 {
13976 relocation -= (rel->r_offset
13977 + input_section->output_offset
13978 + input_section->output_section->vma);
13979 if (relocation + 0x80008000 <= 0xffffffff)
13980 {
13981 unsigned int insn1, insn2;
13982
13983 insn1 = bfd_get_32 (input_bfd, contents + rel->r_offset);
13984 insn2 = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
13985 if ((insn1 & ~0xfffc) == LD_R2_0R12
13986 && insn2 == ADD_R2_R2_R12)
13987 {
13988 bfd_put_32 (input_bfd,
13989 ADDIS_R2_R12 + PPC_HA (relocation),
13990 contents + rel->r_offset);
13991 bfd_put_32 (input_bfd,
13992 ADDI_R2_R2 + PPC_LO (relocation),
13993 contents + rel->r_offset + 4);
13994 }
13995 }
13996 }
13997 break;
13998
13999 case R_PPC64_REL16_HA:
14000 /* If we are generating a non-PIC executable, edit
14001 . 0: addis 2,12,.TOC.-0b@ha
14002 . addi 2,2,.TOC.-0b@l
14003 used by ELFv2 global entry points to set up r2, to
14004 . lis 2,.TOC.@ha
14005 . addi 2,2,.TOC.@l
14006 if .TOC. is in range. */
14007 if (!bfd_link_pic (info)
14008 && !info->traditional_format
14009 && !htab->opd_abi
14010 && rel->r_addend == d_offset
14011 && h != NULL && &h->elf == htab->elf.hgot
14012 && rel + 1 < relend
14013 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_REL16_LO)
14014 && rel[1].r_offset == rel->r_offset + 4
14015 && rel[1].r_addend == rel->r_addend + 4
14016 && relocation + 0x80008000 <= 0xffffffff)
14017 {
14018 unsigned int insn1, insn2;
14019 bfd_vma offset = rel->r_offset - d_offset;
14020 insn1 = bfd_get_32 (input_bfd, contents + offset);
14021 insn2 = bfd_get_32 (input_bfd, contents + offset + 4);
14022 if ((insn1 & 0xffff0000) == ADDIS_R2_R12
14023 && (insn2 & 0xffff0000) == ADDI_R2_R2)
14024 {
14025 r_type = R_PPC64_ADDR16_HA;
14026 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14027 rel->r_addend -= d_offset;
14028 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_ADDR16_LO);
14029 rel[1].r_addend -= d_offset + 4;
14030 bfd_put_32 (input_bfd, LIS_R2, contents + offset);
14031 }
14032 }
14033 break;
14034 }
14035
14036 /* Handle other relocations that tweak non-addend part of insn. */
14037 insn = 0;
14038 max_br_offset = 1 << 25;
14039 addend = rel->r_addend;
14040 reloc_dest = DEST_NORMAL;
14041 switch (r_type)
14042 {
14043 default:
14044 break;
14045
14046 case R_PPC64_TOCSAVE:
14047 if (relocation + addend == (rel->r_offset
14048 + input_section->output_offset
14049 + input_section->output_section->vma)
14050 && tocsave_find (htab, NO_INSERT,
14051 &local_syms, rel, input_bfd))
14052 {
14053 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
14054 if (insn == NOP
14055 || insn == CROR_151515 || insn == CROR_313131)
14056 bfd_put_32 (input_bfd,
14057 STD_R2_0R1 + STK_TOC (htab),
14058 contents + rel->r_offset);
14059 }
14060 break;
14061
14062 /* Branch taken prediction relocations. */
14063 case R_PPC64_ADDR14_BRTAKEN:
14064 case R_PPC64_REL14_BRTAKEN:
14065 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
14066 /* Fall through. */
14067
14068 /* Branch not taken prediction relocations. */
14069 case R_PPC64_ADDR14_BRNTAKEN:
14070 case R_PPC64_REL14_BRNTAKEN:
14071 insn |= bfd_get_32 (input_bfd,
14072 contents + rel->r_offset) & ~(0x01 << 21);
14073 /* Fall through. */
14074
14075 case R_PPC64_REL14:
14076 max_br_offset = 1 << 15;
14077 /* Fall through. */
14078
14079 case R_PPC64_REL24:
14080 /* Calls to functions with a different TOC, such as calls to
14081 shared objects, need to alter the TOC pointer. This is
14082 done using a linkage stub. A REL24 branching to these
14083 linkage stubs needs to be followed by a nop, as the nop
14084 will be replaced with an instruction to restore the TOC
14085 base pointer. */
14086 fdh = h;
14087 if (h != NULL
14088 && h->oh != NULL
14089 && h->oh->is_func_descriptor)
14090 fdh = ppc_follow_link (h->oh);
14091 stub_entry = ppc_get_stub_entry (input_section, sec, fdh, &orig_rel,
14092 htab);
14093 if (stub_entry != NULL
14094 && (stub_entry->stub_type == ppc_stub_plt_call
14095 || stub_entry->stub_type == ppc_stub_plt_call_r2save
14096 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
14097 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
14098 {
14099 bfd_boolean can_plt_call = FALSE;
14100
14101 if (stub_entry->stub_type == ppc_stub_plt_call
14102 && !htab->opd_abi
14103 && htab->params->plt_localentry0 != 0
14104 && is_elfv2_localentry0 (&h->elf))
14105 {
14106 /* The function doesn't use or change r2. */
14107 can_plt_call = TRUE;
14108 }
14109
14110 /* All of these stubs may modify r2, so there must be a
14111 branch and link followed by a nop. The nop is
14112 replaced by an insn to restore r2. */
14113 else if (rel->r_offset + 8 <= input_section->size)
14114 {
14115 unsigned long br;
14116
14117 br = bfd_get_32 (input_bfd,
14118 contents + rel->r_offset);
14119 if ((br & 1) != 0)
14120 {
14121 unsigned long nop;
14122
14123 nop = bfd_get_32 (input_bfd,
14124 contents + rel->r_offset + 4);
14125 if (nop == NOP
14126 || nop == CROR_151515 || nop == CROR_313131)
14127 {
14128 if (h != NULL
14129 && (h == htab->tls_get_addr_fd
14130 || h == htab->tls_get_addr)
14131 && htab->params->tls_get_addr_opt)
14132 {
14133 /* Special stub used, leave nop alone. */
14134 }
14135 else
14136 bfd_put_32 (input_bfd,
14137 LD_R2_0R1 + STK_TOC (htab),
14138 contents + rel->r_offset + 4);
14139 can_plt_call = TRUE;
14140 }
14141 }
14142 }
14143
14144 if (!can_plt_call && h != NULL)
14145 {
14146 const char *name = h->elf.root.root.string;
14147
14148 if (*name == '.')
14149 ++name;
14150
14151 if (strncmp (name, "__libc_start_main", 17) == 0
14152 && (name[17] == 0 || name[17] == '@'))
14153 {
14154 /* Allow crt1 branch to go via a toc adjusting
14155 stub. Other calls that never return could do
14156 the same, if we could detect such. */
14157 can_plt_call = TRUE;
14158 }
14159 }
14160
14161 if (!can_plt_call)
14162 {
14163 /* g++ as of 20130507 emits self-calls without a
14164 following nop. This is arguably wrong since we
14165 have conflicting information. On the one hand a
14166 global symbol and on the other a local call
14167 sequence, but don't error for this special case.
14168 It isn't possible to cheaply verify we have
14169 exactly such a call. Allow all calls to the same
14170 section. */
14171 asection *code_sec = sec;
14172
14173 if (get_opd_info (sec) != NULL)
14174 {
14175 bfd_vma off = (relocation + addend
14176 - sec->output_section->vma
14177 - sec->output_offset);
14178
14179 opd_entry_value (sec, off, &code_sec, NULL, FALSE);
14180 }
14181 if (code_sec == input_section)
14182 can_plt_call = TRUE;
14183 }
14184
14185 if (!can_plt_call)
14186 {
14187 if (stub_entry->stub_type == ppc_stub_plt_call
14188 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14189 info->callbacks->einfo
14190 /* xgettext:c-format */
14191 (_("%H: call to `%T' lacks nop, can't restore toc; "
14192 "recompile with -fPIC\n"),
14193 input_bfd, input_section, rel->r_offset, sym_name);
14194 else
14195 info->callbacks->einfo
14196 /* xgettext:c-format */
14197 (_("%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 (input_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 (input_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 /* xgettext:c-format */
14325 (_("%P: %B: unknown relocation type %d for `%T'\n"),
14326 input_bfd, (int) r_type, sym_name);
14327
14328 bfd_set_error (bfd_error_bad_value);
14329 ret = FALSE;
14330 goto copy_reloc;
14331
14332 case R_PPC64_NONE:
14333 case R_PPC64_TLS:
14334 case R_PPC64_TLSGD:
14335 case R_PPC64_TLSLD:
14336 case R_PPC64_TOCSAVE:
14337 case R_PPC64_GNU_VTINHERIT:
14338 case R_PPC64_GNU_VTENTRY:
14339 case R_PPC64_ENTRY:
14340 goto copy_reloc;
14341
14342 /* GOT16 relocations. Like an ADDR16 using the symbol's
14343 address in the GOT as relocation value instead of the
14344 symbol's value itself. Also, create a GOT entry for the
14345 symbol and put the symbol value there. */
14346 case R_PPC64_GOT_TLSGD16:
14347 case R_PPC64_GOT_TLSGD16_LO:
14348 case R_PPC64_GOT_TLSGD16_HI:
14349 case R_PPC64_GOT_TLSGD16_HA:
14350 tls_type = TLS_TLS | TLS_GD;
14351 goto dogot;
14352
14353 case R_PPC64_GOT_TLSLD16:
14354 case R_PPC64_GOT_TLSLD16_LO:
14355 case R_PPC64_GOT_TLSLD16_HI:
14356 case R_PPC64_GOT_TLSLD16_HA:
14357 tls_type = TLS_TLS | TLS_LD;
14358 goto dogot;
14359
14360 case R_PPC64_GOT_TPREL16_DS:
14361 case R_PPC64_GOT_TPREL16_LO_DS:
14362 case R_PPC64_GOT_TPREL16_HI:
14363 case R_PPC64_GOT_TPREL16_HA:
14364 tls_type = TLS_TLS | TLS_TPREL;
14365 goto dogot;
14366
14367 case R_PPC64_GOT_DTPREL16_DS:
14368 case R_PPC64_GOT_DTPREL16_LO_DS:
14369 case R_PPC64_GOT_DTPREL16_HI:
14370 case R_PPC64_GOT_DTPREL16_HA:
14371 tls_type = TLS_TLS | TLS_DTPREL;
14372 goto dogot;
14373
14374 case R_PPC64_GOT16:
14375 case R_PPC64_GOT16_LO:
14376 case R_PPC64_GOT16_HI:
14377 case R_PPC64_GOT16_HA:
14378 case R_PPC64_GOT16_DS:
14379 case R_PPC64_GOT16_LO_DS:
14380 dogot:
14381 {
14382 /* Relocation is to the entry for this symbol in the global
14383 offset table. */
14384 asection *got;
14385 bfd_vma *offp;
14386 bfd_vma off;
14387 unsigned long indx = 0;
14388 struct got_entry *ent;
14389
14390 if (tls_type == (TLS_TLS | TLS_LD)
14391 && (h == NULL
14392 || !h->elf.def_dynamic))
14393 ent = ppc64_tlsld_got (input_bfd);
14394 else
14395 {
14396 if (h != NULL)
14397 {
14398 if (!htab->elf.dynamic_sections_created
14399 || h->elf.dynindx == -1
14400 || SYMBOL_REFERENCES_LOCAL (info, &h->elf)
14401 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, &h->elf))
14402 /* This is actually a static link, or it is a
14403 -Bsymbolic link and the symbol is defined
14404 locally, or the symbol was forced to be local
14405 because of a version file. */
14406 ;
14407 else
14408 {
14409 indx = h->elf.dynindx;
14410 unresolved_reloc = FALSE;
14411 }
14412 ent = h->elf.got.glist;
14413 }
14414 else
14415 {
14416 if (local_got_ents == NULL)
14417 abort ();
14418 ent = local_got_ents[r_symndx];
14419 }
14420
14421 for (; ent != NULL; ent = ent->next)
14422 if (ent->addend == orig_rel.r_addend
14423 && ent->owner == input_bfd
14424 && ent->tls_type == tls_type)
14425 break;
14426 }
14427
14428 if (ent == NULL)
14429 abort ();
14430 if (ent->is_indirect)
14431 ent = ent->got.ent;
14432 offp = &ent->got.offset;
14433 got = ppc64_elf_tdata (ent->owner)->got;
14434 if (got == NULL)
14435 abort ();
14436
14437 /* The offset must always be a multiple of 8. We use the
14438 least significant bit to record whether we have already
14439 processed this entry. */
14440 off = *offp;
14441 if ((off & 1) != 0)
14442 off &= ~1;
14443 else
14444 {
14445 /* Generate relocs for the dynamic linker, except in
14446 the case of TLSLD where we'll use one entry per
14447 module. */
14448 asection *relgot;
14449 bfd_boolean ifunc;
14450
14451 *offp = off | 1;
14452 relgot = NULL;
14453 ifunc = (h != NULL
14454 ? h->elf.type == STT_GNU_IFUNC
14455 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC);
14456 if (ifunc)
14457 {
14458 relgot = htab->elf.irelplt;
14459 if (indx == 0)
14460 htab->local_ifunc_resolver = 1;
14461 else if (is_static_defined (&h->elf))
14462 htab->maybe_local_ifunc_resolver = 1;
14463 }
14464 else if (indx != 0
14465 || (bfd_link_pic (info)
14466 && (h == NULL
14467 || !UNDEFWEAK_NO_DYNAMIC_RELOC (info, &h->elf)
14468 || (tls_type == (TLS_TLS | TLS_LD)
14469 && !h->elf.def_dynamic))
14470 && !(tls_type == (TLS_TLS | TLS_TPREL)
14471 && bfd_link_executable (info)
14472 && SYMBOL_REFERENCES_LOCAL (info, &h->elf))))
14473 relgot = ppc64_elf_tdata (ent->owner)->relgot;
14474 if (relgot != NULL)
14475 {
14476 outrel.r_offset = (got->output_section->vma
14477 + got->output_offset
14478 + off);
14479 outrel.r_addend = addend;
14480 if (tls_type & (TLS_LD | TLS_GD))
14481 {
14482 outrel.r_addend = 0;
14483 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
14484 if (tls_type == (TLS_TLS | TLS_GD))
14485 {
14486 loc = relgot->contents;
14487 loc += (relgot->reloc_count++
14488 * sizeof (Elf64_External_Rela));
14489 bfd_elf64_swap_reloca_out (output_bfd,
14490 &outrel, loc);
14491 outrel.r_offset += 8;
14492 outrel.r_addend = addend;
14493 outrel.r_info
14494 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
14495 }
14496 }
14497 else if (tls_type == (TLS_TLS | TLS_DTPREL))
14498 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
14499 else if (tls_type == (TLS_TLS | TLS_TPREL))
14500 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
14501 else if (indx != 0)
14502 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
14503 else
14504 {
14505 if (ifunc)
14506 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
14507 else
14508 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
14509
14510 /* Write the .got section contents for the sake
14511 of prelink. */
14512 loc = got->contents + off;
14513 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
14514 loc);
14515 }
14516
14517 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
14518 {
14519 outrel.r_addend += relocation;
14520 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
14521 {
14522 if (htab->elf.tls_sec == NULL)
14523 outrel.r_addend = 0;
14524 else
14525 outrel.r_addend -= htab->elf.tls_sec->vma;
14526 }
14527 }
14528 loc = relgot->contents;
14529 loc += (relgot->reloc_count++
14530 * sizeof (Elf64_External_Rela));
14531 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
14532 }
14533
14534 /* Init the .got section contents here if we're not
14535 emitting a reloc. */
14536 else
14537 {
14538 relocation += addend;
14539 if (tls_type != 0)
14540 {
14541 if (htab->elf.tls_sec == NULL)
14542 relocation = 0;
14543 else
14544 {
14545 if (tls_type & TLS_LD)
14546 relocation = 0;
14547 else
14548 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
14549 if (tls_type & TLS_TPREL)
14550 relocation += DTP_OFFSET - TP_OFFSET;
14551 }
14552
14553 if (tls_type & (TLS_GD | TLS_LD))
14554 {
14555 bfd_put_64 (output_bfd, relocation,
14556 got->contents + off + 8);
14557 relocation = 1;
14558 }
14559 }
14560 bfd_put_64 (output_bfd, relocation,
14561 got->contents + off);
14562 }
14563 }
14564
14565 if (off >= (bfd_vma) -2)
14566 abort ();
14567
14568 relocation = got->output_section->vma + got->output_offset + off;
14569 addend = -(TOCstart + htab->sec_info[input_section->id].toc_off);
14570 }
14571 break;
14572
14573 case R_PPC64_PLT16_HA:
14574 case R_PPC64_PLT16_HI:
14575 case R_PPC64_PLT16_LO:
14576 case R_PPC64_PLT32:
14577 case R_PPC64_PLT64:
14578 /* Relocation is to the entry for this symbol in the
14579 procedure linkage table. */
14580 {
14581 struct plt_entry **plt_list = NULL;
14582 if (h != NULL)
14583 plt_list = &h->elf.plt.plist;
14584 else if (local_got_ents != NULL)
14585 {
14586 struct plt_entry **local_plt = (struct plt_entry **)
14587 (local_got_ents + symtab_hdr->sh_info);
14588 unsigned char *local_got_tls_masks = (unsigned char *)
14589 (local_plt + symtab_hdr->sh_info);
14590 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
14591 plt_list = local_plt + r_symndx;
14592 }
14593 if (plt_list)
14594 {
14595 struct plt_entry *ent;
14596
14597 for (ent = *plt_list; ent != NULL; ent = ent->next)
14598 if (ent->plt.offset != (bfd_vma) -1
14599 && ent->addend == orig_rel.r_addend)
14600 {
14601 asection *plt;
14602
14603 plt = htab->elf.splt;
14604 if (!htab->elf.dynamic_sections_created
14605 || h == NULL
14606 || h->elf.dynindx == -1)
14607 plt = htab->elf.iplt;
14608 relocation = (plt->output_section->vma
14609 + plt->output_offset
14610 + ent->plt.offset);
14611 addend = 0;
14612 unresolved_reloc = FALSE;
14613 break;
14614 }
14615 }
14616 }
14617 break;
14618
14619 case R_PPC64_TOC:
14620 /* Relocation value is TOC base. */
14621 relocation = TOCstart;
14622 if (r_symndx == STN_UNDEF)
14623 relocation += htab->sec_info[input_section->id].toc_off;
14624 else if (unresolved_reloc)
14625 ;
14626 else if (sec != NULL && sec->id < htab->sec_info_arr_size)
14627 relocation += htab->sec_info[sec->id].toc_off;
14628 else
14629 unresolved_reloc = TRUE;
14630 goto dodyn;
14631
14632 /* TOC16 relocs. We want the offset relative to the TOC base,
14633 which is the address of the start of the TOC plus 0x8000.
14634 The TOC consists of sections .got, .toc, .tocbss, and .plt,
14635 in this order. */
14636 case R_PPC64_TOC16:
14637 case R_PPC64_TOC16_LO:
14638 case R_PPC64_TOC16_HI:
14639 case R_PPC64_TOC16_DS:
14640 case R_PPC64_TOC16_LO_DS:
14641 case R_PPC64_TOC16_HA:
14642 addend -= TOCstart + htab->sec_info[input_section->id].toc_off;
14643 break;
14644
14645 /* Relocate against the beginning of the section. */
14646 case R_PPC64_SECTOFF:
14647 case R_PPC64_SECTOFF_LO:
14648 case R_PPC64_SECTOFF_HI:
14649 case R_PPC64_SECTOFF_DS:
14650 case R_PPC64_SECTOFF_LO_DS:
14651 case R_PPC64_SECTOFF_HA:
14652 if (sec != NULL)
14653 addend -= sec->output_section->vma;
14654 break;
14655
14656 case R_PPC64_REL16:
14657 case R_PPC64_REL16_LO:
14658 case R_PPC64_REL16_HI:
14659 case R_PPC64_REL16_HA:
14660 case R_PPC64_REL16DX_HA:
14661 break;
14662
14663 case R_PPC64_REL14:
14664 case R_PPC64_REL14_BRNTAKEN:
14665 case R_PPC64_REL14_BRTAKEN:
14666 case R_PPC64_REL24:
14667 break;
14668
14669 case R_PPC64_TPREL16:
14670 case R_PPC64_TPREL16_LO:
14671 case R_PPC64_TPREL16_HI:
14672 case R_PPC64_TPREL16_HA:
14673 case R_PPC64_TPREL16_DS:
14674 case R_PPC64_TPREL16_LO_DS:
14675 case R_PPC64_TPREL16_HIGH:
14676 case R_PPC64_TPREL16_HIGHA:
14677 case R_PPC64_TPREL16_HIGHER:
14678 case R_PPC64_TPREL16_HIGHERA:
14679 case R_PPC64_TPREL16_HIGHEST:
14680 case R_PPC64_TPREL16_HIGHESTA:
14681 if (h != NULL
14682 && h->elf.root.type == bfd_link_hash_undefweak
14683 && h->elf.dynindx == -1)
14684 {
14685 /* Make this relocation against an undefined weak symbol
14686 resolve to zero. This is really just a tweak, since
14687 code using weak externs ought to check that they are
14688 defined before using them. */
14689 bfd_byte *p = contents + rel->r_offset - d_offset;
14690
14691 insn = bfd_get_32 (input_bfd, p);
14692 insn = _bfd_elf_ppc_at_tprel_transform (insn, 13);
14693 if (insn != 0)
14694 bfd_put_32 (input_bfd, insn, p);
14695 break;
14696 }
14697 if (htab->elf.tls_sec != NULL)
14698 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
14699 /* The TPREL16 relocs shouldn't really be used in shared
14700 libs or with non-local symbols as that will result in
14701 DT_TEXTREL being set, but support them anyway. */
14702 goto dodyn;
14703
14704 case R_PPC64_DTPREL16:
14705 case R_PPC64_DTPREL16_LO:
14706 case R_PPC64_DTPREL16_HI:
14707 case R_PPC64_DTPREL16_HA:
14708 case R_PPC64_DTPREL16_DS:
14709 case R_PPC64_DTPREL16_LO_DS:
14710 case R_PPC64_DTPREL16_HIGH:
14711 case R_PPC64_DTPREL16_HIGHA:
14712 case R_PPC64_DTPREL16_HIGHER:
14713 case R_PPC64_DTPREL16_HIGHERA:
14714 case R_PPC64_DTPREL16_HIGHEST:
14715 case R_PPC64_DTPREL16_HIGHESTA:
14716 if (htab->elf.tls_sec != NULL)
14717 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
14718 break;
14719
14720 case R_PPC64_ADDR64_LOCAL:
14721 addend += PPC64_LOCAL_ENTRY_OFFSET (h != NULL
14722 ? h->elf.other
14723 : sym->st_other);
14724 break;
14725
14726 case R_PPC64_DTPMOD64:
14727 relocation = 1;
14728 addend = 0;
14729 goto dodyn;
14730
14731 case R_PPC64_TPREL64:
14732 if (htab->elf.tls_sec != NULL)
14733 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
14734 goto dodyn;
14735
14736 case R_PPC64_DTPREL64:
14737 if (htab->elf.tls_sec != NULL)
14738 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
14739 /* Fall through. */
14740
14741 /* Relocations that may need to be propagated if this is a
14742 dynamic object. */
14743 case R_PPC64_REL30:
14744 case R_PPC64_REL32:
14745 case R_PPC64_REL64:
14746 case R_PPC64_ADDR14:
14747 case R_PPC64_ADDR14_BRNTAKEN:
14748 case R_PPC64_ADDR14_BRTAKEN:
14749 case R_PPC64_ADDR16:
14750 case R_PPC64_ADDR16_DS:
14751 case R_PPC64_ADDR16_HA:
14752 case R_PPC64_ADDR16_HI:
14753 case R_PPC64_ADDR16_HIGH:
14754 case R_PPC64_ADDR16_HIGHA:
14755 case R_PPC64_ADDR16_HIGHER:
14756 case R_PPC64_ADDR16_HIGHERA:
14757 case R_PPC64_ADDR16_HIGHEST:
14758 case R_PPC64_ADDR16_HIGHESTA:
14759 case R_PPC64_ADDR16_LO:
14760 case R_PPC64_ADDR16_LO_DS:
14761 case R_PPC64_ADDR24:
14762 case R_PPC64_ADDR32:
14763 case R_PPC64_ADDR64:
14764 case R_PPC64_UADDR16:
14765 case R_PPC64_UADDR32:
14766 case R_PPC64_UADDR64:
14767 dodyn:
14768 if ((input_section->flags & SEC_ALLOC) == 0)
14769 break;
14770
14771 if (NO_OPD_RELOCS && is_opd)
14772 break;
14773
14774 if (bfd_link_pic (info)
14775 ? ((h == NULL
14776 || h->dyn_relocs != NULL)
14777 && ((h != NULL && pc_dynrelocs (h))
14778 || must_be_dyn_reloc (info, r_type)))
14779 : (h != NULL
14780 ? h->dyn_relocs != NULL
14781 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
14782 {
14783 bfd_boolean skip, relocate;
14784 asection *sreloc;
14785 bfd_vma out_off;
14786 long indx = 0;
14787
14788 /* When generating a dynamic object, these relocations
14789 are copied into the output file to be resolved at run
14790 time. */
14791
14792 skip = FALSE;
14793 relocate = FALSE;
14794
14795 out_off = _bfd_elf_section_offset (output_bfd, info,
14796 input_section, rel->r_offset);
14797 if (out_off == (bfd_vma) -1)
14798 skip = TRUE;
14799 else if (out_off == (bfd_vma) -2)
14800 skip = TRUE, relocate = TRUE;
14801 out_off += (input_section->output_section->vma
14802 + input_section->output_offset);
14803 outrel.r_offset = out_off;
14804 outrel.r_addend = rel->r_addend;
14805
14806 /* Optimize unaligned reloc use. */
14807 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
14808 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
14809 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
14810 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
14811 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
14812 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
14813 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
14814 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
14815 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
14816
14817 if (skip)
14818 memset (&outrel, 0, sizeof outrel);
14819 else if (!SYMBOL_REFERENCES_LOCAL (info, &h->elf)
14820 && !is_opd
14821 && r_type != R_PPC64_TOC)
14822 {
14823 indx = h->elf.dynindx;
14824 BFD_ASSERT (indx != -1);
14825 outrel.r_info = ELF64_R_INFO (indx, r_type);
14826 }
14827 else
14828 {
14829 /* This symbol is local, or marked to become local,
14830 or this is an opd section reloc which must point
14831 at a local function. */
14832 outrel.r_addend += relocation;
14833 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
14834 {
14835 if (is_opd && h != NULL)
14836 {
14837 /* Lie about opd entries. This case occurs
14838 when building shared libraries and we
14839 reference a function in another shared
14840 lib. The same thing happens for a weak
14841 definition in an application that's
14842 overridden by a strong definition in a
14843 shared lib. (I believe this is a generic
14844 bug in binutils handling of weak syms.)
14845 In these cases we won't use the opd
14846 entry in this lib. */
14847 unresolved_reloc = FALSE;
14848 }
14849 if (!is_opd
14850 && r_type == R_PPC64_ADDR64
14851 && (h != NULL
14852 ? h->elf.type == STT_GNU_IFUNC
14853 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
14854 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
14855 else
14856 {
14857 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
14858
14859 /* We need to relocate .opd contents for ld.so.
14860 Prelink also wants simple and consistent rules
14861 for relocs. This make all RELATIVE relocs have
14862 *r_offset equal to r_addend. */
14863 relocate = TRUE;
14864 }
14865 }
14866 else
14867 {
14868 if (h != NULL
14869 ? h->elf.type == STT_GNU_IFUNC
14870 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
14871 {
14872 info->callbacks->einfo
14873 /* xgettext:c-format */
14874 (_("%H: %s for indirect "
14875 "function `%T' unsupported\n"),
14876 input_bfd, input_section, rel->r_offset,
14877 ppc64_elf_howto_table[r_type]->name,
14878 sym_name);
14879 ret = FALSE;
14880 }
14881 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
14882 ;
14883 else if (sec == NULL || sec->owner == NULL)
14884 {
14885 bfd_set_error (bfd_error_bad_value);
14886 return FALSE;
14887 }
14888 else
14889 {
14890 asection *osec;
14891
14892 osec = sec->output_section;
14893 indx = elf_section_data (osec)->dynindx;
14894
14895 if (indx == 0)
14896 {
14897 if ((osec->flags & SEC_READONLY) == 0
14898 && htab->elf.data_index_section != NULL)
14899 osec = htab->elf.data_index_section;
14900 else
14901 osec = htab->elf.text_index_section;
14902 indx = elf_section_data (osec)->dynindx;
14903 }
14904 BFD_ASSERT (indx != 0);
14905
14906 /* We are turning this relocation into one
14907 against a section symbol, so subtract out
14908 the output section's address but not the
14909 offset of the input section in the output
14910 section. */
14911 outrel.r_addend -= osec->vma;
14912 }
14913
14914 outrel.r_info = ELF64_R_INFO (indx, r_type);
14915 }
14916 }
14917
14918 sreloc = elf_section_data (input_section)->sreloc;
14919 if (h != NULL
14920 ? h->elf.type == STT_GNU_IFUNC
14921 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
14922 {
14923 sreloc = htab->elf.irelplt;
14924 if (indx == 0)
14925 htab->local_ifunc_resolver = 1;
14926 else if (is_static_defined (&h->elf))
14927 htab->maybe_local_ifunc_resolver = 1;
14928 }
14929 if (sreloc == NULL)
14930 abort ();
14931
14932 if (sreloc->reloc_count * sizeof (Elf64_External_Rela)
14933 >= sreloc->size)
14934 abort ();
14935 loc = sreloc->contents;
14936 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
14937 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
14938
14939 /* If this reloc is against an external symbol, it will
14940 be computed at runtime, so there's no need to do
14941 anything now. However, for the sake of prelink ensure
14942 that the section contents are a known value. */
14943 if (! relocate)
14944 {
14945 unresolved_reloc = FALSE;
14946 /* The value chosen here is quite arbitrary as ld.so
14947 ignores section contents except for the special
14948 case of .opd where the contents might be accessed
14949 before relocation. Choose zero, as that won't
14950 cause reloc overflow. */
14951 relocation = 0;
14952 addend = 0;
14953 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
14954 to improve backward compatibility with older
14955 versions of ld. */
14956 if (r_type == R_PPC64_ADDR64)
14957 addend = outrel.r_addend;
14958 /* Adjust pc_relative relocs to have zero in *r_offset. */
14959 else if (ppc64_elf_howto_table[r_type]->pc_relative)
14960 addend = outrel.r_offset;
14961 }
14962 }
14963 break;
14964
14965 case R_PPC64_COPY:
14966 case R_PPC64_GLOB_DAT:
14967 case R_PPC64_JMP_SLOT:
14968 case R_PPC64_JMP_IREL:
14969 case R_PPC64_RELATIVE:
14970 /* We shouldn't ever see these dynamic relocs in relocatable
14971 files. */
14972 /* Fall through. */
14973
14974 case R_PPC64_PLTGOT16:
14975 case R_PPC64_PLTGOT16_DS:
14976 case R_PPC64_PLTGOT16_HA:
14977 case R_PPC64_PLTGOT16_HI:
14978 case R_PPC64_PLTGOT16_LO:
14979 case R_PPC64_PLTGOT16_LO_DS:
14980 case R_PPC64_PLTREL32:
14981 case R_PPC64_PLTREL64:
14982 /* These ones haven't been implemented yet. */
14983
14984 info->callbacks->einfo
14985 /* xgettext:c-format */
14986 (_("%P: %B: %s is not supported for `%T'\n"),
14987 input_bfd,
14988 ppc64_elf_howto_table[r_type]->name, sym_name);
14989
14990 bfd_set_error (bfd_error_invalid_operation);
14991 ret = FALSE;
14992 goto copy_reloc;
14993 }
14994
14995 /* Multi-instruction sequences that access the TOC can be
14996 optimized, eg. addis ra,r2,0; addi rb,ra,x;
14997 to nop; addi rb,r2,x; */
14998 howto = ppc64_elf_howto_table[(int) r_type];
14999 switch (r_type)
15000 {
15001 default:
15002 break;
15003
15004 case R_PPC64_GOT_TLSLD16_HI:
15005 case R_PPC64_GOT_TLSGD16_HI:
15006 case R_PPC64_GOT_TPREL16_HI:
15007 case R_PPC64_GOT_DTPREL16_HI:
15008 case R_PPC64_GOT16_HI:
15009 case R_PPC64_TOC16_HI:
15010 /* These relocs would only be useful if building up an
15011 offset to later add to r2, perhaps in an indexed
15012 addressing mode instruction. Don't try to optimize.
15013 Unfortunately, the possibility of someone building up an
15014 offset like this or even with the HA relocs, means that
15015 we need to check the high insn when optimizing the low
15016 insn. */
15017 break;
15018
15019 case R_PPC64_GOT_TLSLD16_HA:
15020 case R_PPC64_GOT_TLSGD16_HA:
15021 case R_PPC64_GOT_TPREL16_HA:
15022 case R_PPC64_GOT_DTPREL16_HA:
15023 case R_PPC64_GOT16_HA:
15024 case R_PPC64_TOC16_HA:
15025 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
15026 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
15027 {
15028 bfd_byte *p = contents + (rel->r_offset & ~3);
15029 bfd_put_32 (input_bfd, NOP, p);
15030 }
15031 break;
15032
15033 case R_PPC64_GOT_TLSLD16_LO:
15034 case R_PPC64_GOT_TLSGD16_LO:
15035 case R_PPC64_GOT_TPREL16_LO_DS:
15036 case R_PPC64_GOT_DTPREL16_LO_DS:
15037 case R_PPC64_GOT16_LO:
15038 case R_PPC64_GOT16_LO_DS:
15039 case R_PPC64_TOC16_LO:
15040 case R_PPC64_TOC16_LO_DS:
15041 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
15042 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
15043 {
15044 bfd_byte *p = contents + (rel->r_offset & ~3);
15045 insn = bfd_get_32 (input_bfd, p);
15046 if ((insn & (0x3f << 26)) == 12u << 26 /* addic */)
15047 {
15048 /* Transform addic to addi when we change reg. */
15049 insn &= ~((0x3f << 26) | (0x1f << 16));
15050 insn |= (14u << 26) | (2 << 16);
15051 }
15052 else
15053 {
15054 insn &= ~(0x1f << 16);
15055 insn |= 2 << 16;
15056 }
15057 bfd_put_32 (input_bfd, insn, p);
15058 }
15059 break;
15060
15061 case R_PPC64_TPREL16_HA:
15062 if (htab->do_tls_opt && relocation + addend + 0x8000 < 0x10000)
15063 {
15064 bfd_byte *p = contents + (rel->r_offset & ~3);
15065 insn = bfd_get_32 (input_bfd, p);
15066 if ((insn & ((0x3f << 26) | 0x1f << 16))
15067 != ((15u << 26) | (13 << 16)) /* addis rt,13,imm */)
15068 /* xgettext:c-format */
15069 info->callbacks->minfo
15070 (_("%H: warning: %s unexpected insn %#x.\n"),
15071 input_bfd, input_section, rel->r_offset, howto->name, insn);
15072 else
15073 bfd_put_32 (input_bfd, NOP, p);
15074 }
15075 break;
15076
15077 case R_PPC64_TPREL16_LO:
15078 case R_PPC64_TPREL16_LO_DS:
15079 if (htab->do_tls_opt && relocation + addend + 0x8000 < 0x10000)
15080 {
15081 bfd_byte *p = contents + (rel->r_offset & ~3);
15082 insn = bfd_get_32 (input_bfd, p);
15083 insn &= ~(0x1f << 16);
15084 insn |= 13 << 16;
15085 bfd_put_32 (input_bfd, insn, p);
15086 }
15087 break;
15088 }
15089
15090 /* Do any further special processing. */
15091 switch (r_type)
15092 {
15093 default:
15094 break;
15095
15096 case R_PPC64_REL16_HA:
15097 case R_PPC64_REL16DX_HA:
15098 case R_PPC64_ADDR16_HA:
15099 case R_PPC64_ADDR16_HIGHA:
15100 case R_PPC64_ADDR16_HIGHERA:
15101 case R_PPC64_ADDR16_HIGHESTA:
15102 case R_PPC64_TOC16_HA:
15103 case R_PPC64_SECTOFF_HA:
15104 case R_PPC64_TPREL16_HA:
15105 case R_PPC64_TPREL16_HIGHA:
15106 case R_PPC64_TPREL16_HIGHERA:
15107 case R_PPC64_TPREL16_HIGHESTA:
15108 case R_PPC64_DTPREL16_HA:
15109 case R_PPC64_DTPREL16_HIGHA:
15110 case R_PPC64_DTPREL16_HIGHERA:
15111 case R_PPC64_DTPREL16_HIGHESTA:
15112 /* It's just possible that this symbol is a weak symbol
15113 that's not actually defined anywhere. In that case,
15114 'sec' would be NULL, and we should leave the symbol
15115 alone (it will be set to zero elsewhere in the link). */
15116 if (sec == NULL)
15117 break;
15118 /* Fall through. */
15119
15120 case R_PPC64_GOT16_HA:
15121 case R_PPC64_PLTGOT16_HA:
15122 case R_PPC64_PLT16_HA:
15123 case R_PPC64_GOT_TLSGD16_HA:
15124 case R_PPC64_GOT_TLSLD16_HA:
15125 case R_PPC64_GOT_TPREL16_HA:
15126 case R_PPC64_GOT_DTPREL16_HA:
15127 /* Add 0x10000 if sign bit in 0:15 is set.
15128 Bits 0:15 are not used. */
15129 addend += 0x8000;
15130 break;
15131
15132 case R_PPC64_ADDR16_DS:
15133 case R_PPC64_ADDR16_LO_DS:
15134 case R_PPC64_GOT16_DS:
15135 case R_PPC64_GOT16_LO_DS:
15136 case R_PPC64_PLT16_LO_DS:
15137 case R_PPC64_SECTOFF_DS:
15138 case R_PPC64_SECTOFF_LO_DS:
15139 case R_PPC64_TOC16_DS:
15140 case R_PPC64_TOC16_LO_DS:
15141 case R_PPC64_PLTGOT16_DS:
15142 case R_PPC64_PLTGOT16_LO_DS:
15143 case R_PPC64_GOT_TPREL16_DS:
15144 case R_PPC64_GOT_TPREL16_LO_DS:
15145 case R_PPC64_GOT_DTPREL16_DS:
15146 case R_PPC64_GOT_DTPREL16_LO_DS:
15147 case R_PPC64_TPREL16_DS:
15148 case R_PPC64_TPREL16_LO_DS:
15149 case R_PPC64_DTPREL16_DS:
15150 case R_PPC64_DTPREL16_LO_DS:
15151 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
15152 mask = 3;
15153 /* If this reloc is against an lq, lxv, or stxv insn, then
15154 the value must be a multiple of 16. This is somewhat of
15155 a hack, but the "correct" way to do this by defining _DQ
15156 forms of all the _DS relocs bloats all reloc switches in
15157 this file. It doesn't make much sense to use these
15158 relocs in data, so testing the insn should be safe. */
15159 if ((insn & (0x3f << 26)) == (56u << 26)
15160 || ((insn & (0x3f << 26)) == (61u << 26) && (insn & 3) == 1))
15161 mask = 15;
15162 relocation += addend;
15163 addend = insn & (mask ^ 3);
15164 if ((relocation & mask) != 0)
15165 {
15166 relocation ^= relocation & mask;
15167 info->callbacks->einfo
15168 /* xgettext:c-format */
15169 (_("%H: error: %s not a multiple of %u\n"),
15170 input_bfd, input_section, rel->r_offset,
15171 howto->name,
15172 mask + 1);
15173 bfd_set_error (bfd_error_bad_value);
15174 ret = FALSE;
15175 goto copy_reloc;
15176 }
15177 break;
15178 }
15179
15180 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
15181 because such sections are not SEC_ALLOC and thus ld.so will
15182 not process them. */
15183 if (unresolved_reloc
15184 && !((input_section->flags & SEC_DEBUGGING) != 0
15185 && h->elf.def_dynamic)
15186 && _bfd_elf_section_offset (output_bfd, info, input_section,
15187 rel->r_offset) != (bfd_vma) -1)
15188 {
15189 info->callbacks->einfo
15190 /* xgettext:c-format */
15191 (_("%H: unresolvable %s against `%T'\n"),
15192 input_bfd, input_section, rel->r_offset,
15193 howto->name,
15194 h->elf.root.root.string);
15195 ret = FALSE;
15196 }
15197
15198 /* 16-bit fields in insns mostly have signed values, but a
15199 few insns have 16-bit unsigned values. Really, we should
15200 have different reloc types. */
15201 if (howto->complain_on_overflow != complain_overflow_dont
15202 && howto->dst_mask == 0xffff
15203 && (input_section->flags & SEC_CODE) != 0)
15204 {
15205 enum complain_overflow complain = complain_overflow_signed;
15206
15207 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
15208 if ((insn & (0x3f << 26)) == 10u << 26 /* cmpli */)
15209 complain = complain_overflow_bitfield;
15210 else if (howto->rightshift == 0
15211 ? ((insn & (0x3f << 26)) == 28u << 26 /* andi */
15212 || (insn & (0x3f << 26)) == 24u << 26 /* ori */
15213 || (insn & (0x3f << 26)) == 26u << 26 /* xori */)
15214 : ((insn & (0x3f << 26)) == 29u << 26 /* andis */
15215 || (insn & (0x3f << 26)) == 25u << 26 /* oris */
15216 || (insn & (0x3f << 26)) == 27u << 26 /* xoris */))
15217 complain = complain_overflow_unsigned;
15218 if (howto->complain_on_overflow != complain)
15219 {
15220 alt_howto = *howto;
15221 alt_howto.complain_on_overflow = complain;
15222 howto = &alt_howto;
15223 }
15224 }
15225
15226 if (r_type == R_PPC64_REL16DX_HA)
15227 {
15228 /* Split field reloc isn't handled by _bfd_final_link_relocate. */
15229 if (rel->r_offset + 4 > input_section->size)
15230 r = bfd_reloc_outofrange;
15231 else
15232 {
15233 relocation += addend;
15234 relocation -= (rel->r_offset
15235 + input_section->output_offset
15236 + input_section->output_section->vma);
15237 relocation = (bfd_signed_vma) relocation >> 16;
15238 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
15239 insn &= ~0x1fffc1;
15240 insn |= (relocation & 0xffc1) | ((relocation & 0x3e) << 15);
15241 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
15242 r = bfd_reloc_ok;
15243 if (relocation + 0x8000 > 0xffff)
15244 r = bfd_reloc_overflow;
15245 }
15246 }
15247 else
15248 r = _bfd_final_link_relocate (howto, input_bfd, input_section, contents,
15249 rel->r_offset, relocation, addend);
15250
15251 if (r != bfd_reloc_ok)
15252 {
15253 char *more_info = NULL;
15254 const char *reloc_name = howto->name;
15255
15256 if (reloc_dest != DEST_NORMAL)
15257 {
15258 more_info = bfd_malloc (strlen (reloc_name) + 8);
15259 if (more_info != NULL)
15260 {
15261 strcpy (more_info, reloc_name);
15262 strcat (more_info, (reloc_dest == DEST_OPD
15263 ? " (OPD)" : " (stub)"));
15264 reloc_name = more_info;
15265 }
15266 }
15267
15268 if (r == bfd_reloc_overflow)
15269 {
15270 /* On code like "if (foo) foo();" don't report overflow
15271 on a branch to zero when foo is undefined. */
15272 if (!warned
15273 && (reloc_dest == DEST_STUB
15274 || !(h != NULL
15275 && (h->elf.root.type == bfd_link_hash_undefweak
15276 || h->elf.root.type == bfd_link_hash_undefined)
15277 && is_branch_reloc (r_type))))
15278 info->callbacks->reloc_overflow (info, &h->elf.root,
15279 sym_name, reloc_name,
15280 orig_rel.r_addend,
15281 input_bfd, input_section,
15282 rel->r_offset);
15283 }
15284 else
15285 {
15286 info->callbacks->einfo
15287 /* xgettext:c-format */
15288 (_("%H: %s against `%T': error %d\n"),
15289 input_bfd, input_section, rel->r_offset,
15290 reloc_name, sym_name, (int) r);
15291 ret = FALSE;
15292 }
15293 if (more_info != NULL)
15294 free (more_info);
15295 }
15296 copy_reloc:
15297 if (wrel != rel)
15298 *wrel = *rel;
15299 }
15300
15301 if (wrel != rel)
15302 {
15303 Elf_Internal_Shdr *rel_hdr;
15304 size_t deleted = rel - wrel;
15305
15306 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
15307 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
15308 if (rel_hdr->sh_size == 0)
15309 {
15310 /* It is too late to remove an empty reloc section. Leave
15311 one NONE reloc.
15312 ??? What is wrong with an empty section??? */
15313 rel_hdr->sh_size = rel_hdr->sh_entsize;
15314 deleted -= 1;
15315 }
15316 rel_hdr = _bfd_elf_single_rel_hdr (input_section);
15317 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
15318 input_section->reloc_count -= deleted;
15319 }
15320
15321 /* If we're emitting relocations, then shortly after this function
15322 returns, reloc offsets and addends for this section will be
15323 adjusted. Worse, reloc symbol indices will be for the output
15324 file rather than the input. Save a copy of the relocs for
15325 opd_entry_value. */
15326 if (is_opd && (info->emitrelocations || bfd_link_relocatable (info)))
15327 {
15328 bfd_size_type amt;
15329 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
15330 rel = bfd_alloc (input_bfd, amt);
15331 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd.relocs == NULL);
15332 ppc64_elf_tdata (input_bfd)->opd.relocs = rel;
15333 if (rel == NULL)
15334 return FALSE;
15335 memcpy (rel, relocs, amt);
15336 }
15337 return ret;
15338 }
15339
15340 /* Adjust the value of any local symbols in opd sections. */
15341
15342 static int
15343 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
15344 const char *name ATTRIBUTE_UNUSED,
15345 Elf_Internal_Sym *elfsym,
15346 asection *input_sec,
15347 struct elf_link_hash_entry *h)
15348 {
15349 struct _opd_sec_data *opd;
15350 long adjust;
15351 bfd_vma value;
15352
15353 if (h != NULL)
15354 return 1;
15355
15356 opd = get_opd_info (input_sec);
15357 if (opd == NULL || opd->adjust == NULL)
15358 return 1;
15359
15360 value = elfsym->st_value - input_sec->output_offset;
15361 if (!bfd_link_relocatable (info))
15362 value -= input_sec->output_section->vma;
15363
15364 adjust = opd->adjust[OPD_NDX (value)];
15365 if (adjust == -1)
15366 return 2;
15367
15368 elfsym->st_value += adjust;
15369 return 1;
15370 }
15371
15372 /* Finish up dynamic symbol handling. We set the contents of various
15373 dynamic sections here. */
15374
15375 static bfd_boolean
15376 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
15377 struct bfd_link_info *info,
15378 struct elf_link_hash_entry *h,
15379 Elf_Internal_Sym *sym)
15380 {
15381 struct ppc_link_hash_table *htab;
15382 struct plt_entry *ent;
15383 Elf_Internal_Rela rela;
15384 bfd_byte *loc;
15385
15386 htab = ppc_hash_table (info);
15387 if (htab == NULL)
15388 return FALSE;
15389
15390 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
15391 if (ent->plt.offset != (bfd_vma) -1)
15392 {
15393 /* This symbol has an entry in the procedure linkage
15394 table. Set it up. */
15395 if (!htab->elf.dynamic_sections_created
15396 || h->dynindx == -1)
15397 {
15398 BFD_ASSERT (h->type == STT_GNU_IFUNC
15399 && h->def_regular
15400 && (h->root.type == bfd_link_hash_defined
15401 || h->root.type == bfd_link_hash_defweak));
15402 rela.r_offset = (htab->elf.iplt->output_section->vma
15403 + htab->elf.iplt->output_offset
15404 + ent->plt.offset);
15405 if (htab->opd_abi)
15406 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
15407 else
15408 rela.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
15409 rela.r_addend = (h->root.u.def.value
15410 + h->root.u.def.section->output_offset
15411 + h->root.u.def.section->output_section->vma
15412 + ent->addend);
15413 loc = (htab->elf.irelplt->contents
15414 + (htab->elf.irelplt->reloc_count++
15415 * sizeof (Elf64_External_Rela)));
15416 htab->local_ifunc_resolver = 1;
15417 }
15418 else
15419 {
15420 rela.r_offset = (htab->elf.splt->output_section->vma
15421 + htab->elf.splt->output_offset
15422 + ent->plt.offset);
15423 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
15424 rela.r_addend = ent->addend;
15425 loc = (htab->elf.srelplt->contents
15426 + ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE (htab))
15427 / PLT_ENTRY_SIZE (htab) * sizeof (Elf64_External_Rela)));
15428 if (h->type == STT_GNU_IFUNC && is_static_defined (h))
15429 htab->maybe_local_ifunc_resolver = 1;
15430 }
15431 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
15432
15433 if (!htab->opd_abi)
15434 {
15435 if (!h->def_regular)
15436 {
15437 /* Mark the symbol as undefined, rather than as
15438 defined in glink. Leave the value if there were
15439 any relocations where pointer equality matters
15440 (this is a clue for the dynamic linker, to make
15441 function pointer comparisons work between an
15442 application and shared library), otherwise set it
15443 to zero. */
15444 sym->st_shndx = SHN_UNDEF;
15445 if (!h->pointer_equality_needed)
15446 sym->st_value = 0;
15447 else if (!h->ref_regular_nonweak)
15448 {
15449 /* This breaks function pointer comparisons, but
15450 that is better than breaking tests for a NULL
15451 function pointer. */
15452 sym->st_value = 0;
15453 }
15454 }
15455 }
15456 }
15457
15458 if (h->needs_copy)
15459 {
15460 /* This symbol needs a copy reloc. Set it up. */
15461 asection *srel;
15462
15463 if (h->dynindx == -1
15464 || (h->root.type != bfd_link_hash_defined
15465 && h->root.type != bfd_link_hash_defweak)
15466 || htab->elf.srelbss == NULL
15467 || htab->elf.sreldynrelro == NULL)
15468 abort ();
15469
15470 rela.r_offset = (h->root.u.def.value
15471 + h->root.u.def.section->output_section->vma
15472 + h->root.u.def.section->output_offset);
15473 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
15474 rela.r_addend = 0;
15475 if (h->root.u.def.section == htab->elf.sdynrelro)
15476 srel = htab->elf.sreldynrelro;
15477 else
15478 srel = htab->elf.srelbss;
15479 loc = srel->contents;
15480 loc += srel->reloc_count++ * sizeof (Elf64_External_Rela);
15481 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
15482 }
15483
15484 return TRUE;
15485 }
15486
15487 /* Used to decide how to sort relocs in an optimal manner for the
15488 dynamic linker, before writing them out. */
15489
15490 static enum elf_reloc_type_class
15491 ppc64_elf_reloc_type_class (const struct bfd_link_info *info,
15492 const asection *rel_sec,
15493 const Elf_Internal_Rela *rela)
15494 {
15495 enum elf_ppc64_reloc_type r_type;
15496 struct ppc_link_hash_table *htab = ppc_hash_table (info);
15497
15498 if (rel_sec == htab->elf.irelplt)
15499 return reloc_class_ifunc;
15500
15501 r_type = ELF64_R_TYPE (rela->r_info);
15502 switch (r_type)
15503 {
15504 case R_PPC64_RELATIVE:
15505 return reloc_class_relative;
15506 case R_PPC64_JMP_SLOT:
15507 return reloc_class_plt;
15508 case R_PPC64_COPY:
15509 return reloc_class_copy;
15510 default:
15511 return reloc_class_normal;
15512 }
15513 }
15514
15515 /* Finish up the dynamic sections. */
15516
15517 static bfd_boolean
15518 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
15519 struct bfd_link_info *info)
15520 {
15521 struct ppc_link_hash_table *htab;
15522 bfd *dynobj;
15523 asection *sdyn;
15524
15525 htab = ppc_hash_table (info);
15526 if (htab == NULL)
15527 return FALSE;
15528
15529 dynobj = htab->elf.dynobj;
15530 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
15531
15532 if (htab->elf.dynamic_sections_created)
15533 {
15534 Elf64_External_Dyn *dyncon, *dynconend;
15535
15536 if (sdyn == NULL || htab->elf.sgot == NULL)
15537 abort ();
15538
15539 dyncon = (Elf64_External_Dyn *) sdyn->contents;
15540 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
15541 for (; dyncon < dynconend; dyncon++)
15542 {
15543 Elf_Internal_Dyn dyn;
15544 asection *s;
15545
15546 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
15547
15548 switch (dyn.d_tag)
15549 {
15550 default:
15551 continue;
15552
15553 case DT_PPC64_GLINK:
15554 s = htab->glink;
15555 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15556 /* We stupidly defined DT_PPC64_GLINK to be the start
15557 of glink rather than the first entry point, which is
15558 what ld.so needs, and now have a bigger stub to
15559 support automatic multiple TOCs. */
15560 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 8 * 4;
15561 break;
15562
15563 case DT_PPC64_OPD:
15564 s = bfd_get_section_by_name (output_bfd, ".opd");
15565 if (s == NULL)
15566 continue;
15567 dyn.d_un.d_ptr = s->vma;
15568 break;
15569
15570 case DT_PPC64_OPT:
15571 if (htab->do_multi_toc && htab->multi_toc_needed)
15572 dyn.d_un.d_val |= PPC64_OPT_MULTI_TOC;
15573 if (htab->has_plt_localentry0)
15574 dyn.d_un.d_val |= PPC64_OPT_LOCALENTRY;
15575 break;
15576
15577 case DT_PPC64_OPDSZ:
15578 s = bfd_get_section_by_name (output_bfd, ".opd");
15579 if (s == NULL)
15580 continue;
15581 dyn.d_un.d_val = s->size;
15582 break;
15583
15584 case DT_PLTGOT:
15585 s = htab->elf.splt;
15586 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15587 break;
15588
15589 case DT_JMPREL:
15590 s = htab->elf.srelplt;
15591 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15592 break;
15593
15594 case DT_PLTRELSZ:
15595 dyn.d_un.d_val = htab->elf.srelplt->size;
15596 break;
15597
15598 case DT_TEXTREL:
15599 if (htab->local_ifunc_resolver)
15600 info->callbacks->einfo
15601 (_("%X%P: text relocations and GNU indirect "
15602 "functions will result in a segfault at runtime\n"));
15603 else if (htab->maybe_local_ifunc_resolver)
15604 info->callbacks->einfo
15605 (_("%P: warning: text relocations and GNU indirect "
15606 "functions may result in a segfault at runtime\n"));
15607 continue;
15608 }
15609
15610 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
15611 }
15612 }
15613
15614 if (htab->elf.sgot != NULL && htab->elf.sgot->size != 0
15615 && htab->elf.sgot->output_section != bfd_abs_section_ptr)
15616 {
15617 /* Fill in the first entry in the global offset table.
15618 We use it to hold the link-time TOCbase. */
15619 bfd_put_64 (output_bfd,
15620 elf_gp (output_bfd) + TOC_BASE_OFF,
15621 htab->elf.sgot->contents);
15622
15623 /* Set .got entry size. */
15624 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 8;
15625 }
15626
15627 if (htab->elf.splt != NULL && htab->elf.splt->size != 0
15628 && htab->elf.splt->output_section != bfd_abs_section_ptr)
15629 {
15630 /* Set .plt entry size. */
15631 elf_section_data (htab->elf.splt->output_section)->this_hdr.sh_entsize
15632 = PLT_ENTRY_SIZE (htab);
15633 }
15634
15635 /* brlt is SEC_LINKER_CREATED, so we need to write out relocs for
15636 brlt ourselves if emitrelocations. */
15637 if (htab->brlt != NULL
15638 && htab->brlt->reloc_count != 0
15639 && !_bfd_elf_link_output_relocs (output_bfd,
15640 htab->brlt,
15641 elf_section_data (htab->brlt)->rela.hdr,
15642 elf_section_data (htab->brlt)->relocs,
15643 NULL))
15644 return FALSE;
15645
15646 if (htab->glink != NULL
15647 && htab->glink->reloc_count != 0
15648 && !_bfd_elf_link_output_relocs (output_bfd,
15649 htab->glink,
15650 elf_section_data (htab->glink)->rela.hdr,
15651 elf_section_data (htab->glink)->relocs,
15652 NULL))
15653 return FALSE;
15654
15655 if (htab->glink_eh_frame != NULL
15656 && htab->glink_eh_frame->size != 0)
15657 {
15658 bfd_vma val;
15659 bfd_byte *p;
15660 struct map_stub *group;
15661 size_t align = 4;
15662
15663 p = htab->glink_eh_frame->contents;
15664 p += (sizeof (glink_eh_frame_cie) + align - 1) & -align;
15665
15666 for (group = htab->group; group != NULL; group = group->next)
15667 if (group->stub_sec != NULL)
15668 {
15669 /* Offset to stub section. */
15670 val = (group->stub_sec->output_section->vma
15671 + group->stub_sec->output_offset);
15672 val -= (htab->glink_eh_frame->output_section->vma
15673 + htab->glink_eh_frame->output_offset
15674 + (p + 8 - htab->glink_eh_frame->contents));
15675 if (val + 0x80000000 > 0xffffffff)
15676 {
15677 info->callbacks->einfo
15678 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
15679 group->stub_sec->name);
15680 return FALSE;
15681 }
15682 bfd_put_32 (dynobj, val, p + 8);
15683 p += stub_eh_frame_size (group, align);
15684 }
15685 if (htab->glink != NULL && htab->glink->size != 0)
15686 {
15687 /* Offset to .glink. */
15688 val = (htab->glink->output_section->vma
15689 + htab->glink->output_offset
15690 + 8);
15691 val -= (htab->glink_eh_frame->output_section->vma
15692 + htab->glink_eh_frame->output_offset
15693 + (p + 8 - htab->glink_eh_frame->contents));
15694 if (val + 0x80000000 > 0xffffffff)
15695 {
15696 info->callbacks->einfo
15697 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
15698 htab->glink->name);
15699 return FALSE;
15700 }
15701 bfd_put_32 (dynobj, val, p + 8);
15702 p += (24 + align - 1) & -align;
15703 }
15704
15705 if (htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME
15706 && !_bfd_elf_write_section_eh_frame (output_bfd, info,
15707 htab->glink_eh_frame,
15708 htab->glink_eh_frame->contents))
15709 return FALSE;
15710 }
15711
15712 /* We need to handle writing out multiple GOT sections ourselves,
15713 since we didn't add them to DYNOBJ. We know dynobj is the first
15714 bfd. */
15715 while ((dynobj = dynobj->link.next) != NULL)
15716 {
15717 asection *s;
15718
15719 if (!is_ppc64_elf (dynobj))
15720 continue;
15721
15722 s = ppc64_elf_tdata (dynobj)->got;
15723 if (s != NULL
15724 && s->size != 0
15725 && s->output_section != bfd_abs_section_ptr
15726 && !bfd_set_section_contents (output_bfd, s->output_section,
15727 s->contents, s->output_offset,
15728 s->size))
15729 return FALSE;
15730 s = ppc64_elf_tdata (dynobj)->relgot;
15731 if (s != NULL
15732 && s->size != 0
15733 && s->output_section != bfd_abs_section_ptr
15734 && !bfd_set_section_contents (output_bfd, s->output_section,
15735 s->contents, s->output_offset,
15736 s->size))
15737 return FALSE;
15738 }
15739
15740 return TRUE;
15741 }
15742
15743 #include "elf64-target.h"
15744
15745 /* FreeBSD support */
15746
15747 #undef TARGET_LITTLE_SYM
15748 #undef TARGET_LITTLE_NAME
15749
15750 #undef TARGET_BIG_SYM
15751 #define TARGET_BIG_SYM powerpc_elf64_fbsd_vec
15752 #undef TARGET_BIG_NAME
15753 #define TARGET_BIG_NAME "elf64-powerpc-freebsd"
15754
15755 #undef ELF_OSABI
15756 #define ELF_OSABI ELFOSABI_FREEBSD
15757
15758 #undef elf64_bed
15759 #define elf64_bed elf64_powerpc_fbsd_bed
15760
15761 #include "elf64-target.h"
GDB Binutils - Deliverables
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