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PR22300, Abort in elf32_hppa_relocate_section building polyml
[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 /* Chain of aliases referring to a weakdef. */
4005 struct ppc_link_hash_entry *weakref;
4006
4007 /* Link between function code and descriptor symbols. */
4008 struct ppc_link_hash_entry *oh;
4009
4010 /* Flag function code and descriptor symbols. */
4011 unsigned int is_func:1;
4012 unsigned int is_func_descriptor:1;
4013 unsigned int fake:1;
4014
4015 /* Whether global opd/toc sym has been adjusted or not.
4016 After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
4017 should be set for all globals defined in any opd/toc section. */
4018 unsigned int adjust_done:1;
4019
4020 /* Set if this is an out-of-line register save/restore function,
4021 with non-standard calling convention. */
4022 unsigned int save_res:1;
4023
4024 /* Set if a duplicate symbol with non-zero localentry is detected,
4025 even when the duplicate symbol does not provide a definition. */
4026 unsigned int non_zero_localentry:1;
4027
4028 /* Contexts in which symbol is used in the GOT (or TOC).
4029 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
4030 corresponding relocs are encountered during check_relocs.
4031 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
4032 indicate the corresponding GOT entry type is not needed.
4033 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
4034 a TPREL one. We use a separate flag rather than setting TPREL
4035 just for convenience in distinguishing the two cases. */
4036 #define TLS_GD 1 /* GD reloc. */
4037 #define TLS_LD 2 /* LD reloc. */
4038 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
4039 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
4040 #define TLS_TLS 16 /* Any TLS reloc. */
4041 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
4042 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
4043 #define PLT_IFUNC 128 /* STT_GNU_IFUNC. */
4044 unsigned char tls_mask;
4045 };
4046
4047 /* ppc64 ELF linker hash table. */
4048
4049 struct ppc_link_hash_table
4050 {
4051 struct elf_link_hash_table elf;
4052
4053 /* The stub hash table. */
4054 struct bfd_hash_table stub_hash_table;
4055
4056 /* Another hash table for plt_branch stubs. */
4057 struct bfd_hash_table branch_hash_table;
4058
4059 /* Hash table for function prologue tocsave. */
4060 htab_t tocsave_htab;
4061
4062 /* Various options and other info passed from the linker. */
4063 struct ppc64_elf_params *params;
4064
4065 /* The size of sec_info below. */
4066 unsigned int sec_info_arr_size;
4067
4068 /* Per-section array of extra section info. Done this way rather
4069 than as part of ppc64_elf_section_data so we have the info for
4070 non-ppc64 sections. */
4071 struct
4072 {
4073 /* Along with elf_gp, specifies the TOC pointer used by this section. */
4074 bfd_vma toc_off;
4075
4076 union
4077 {
4078 /* The section group that this section belongs to. */
4079 struct map_stub *group;
4080 /* A temp section list pointer. */
4081 asection *list;
4082 } u;
4083 } *sec_info;
4084
4085 /* Linked list of groups. */
4086 struct map_stub *group;
4087
4088 /* Temp used when calculating TOC pointers. */
4089 bfd_vma toc_curr;
4090 bfd *toc_bfd;
4091 asection *toc_first_sec;
4092
4093 /* Used when adding symbols. */
4094 struct ppc_link_hash_entry *dot_syms;
4095
4096 /* Shortcuts to get to dynamic linker sections. */
4097 asection *glink;
4098 asection *sfpr;
4099 asection *brlt;
4100 asection *relbrlt;
4101 asection *glink_eh_frame;
4102
4103 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
4104 struct ppc_link_hash_entry *tls_get_addr;
4105 struct ppc_link_hash_entry *tls_get_addr_fd;
4106
4107 /* The size of reliplt used by got entry relocs. */
4108 bfd_size_type got_reli_size;
4109
4110 /* Statistics. */
4111 unsigned long stub_count[ppc_stub_global_entry];
4112
4113 /* Number of stubs against global syms. */
4114 unsigned long stub_globals;
4115
4116 /* Set if we're linking code with function descriptors. */
4117 unsigned int opd_abi:1;
4118
4119 /* Support for multiple toc sections. */
4120 unsigned int do_multi_toc:1;
4121 unsigned int multi_toc_needed:1;
4122 unsigned int second_toc_pass:1;
4123 unsigned int do_toc_opt:1;
4124
4125 /* Set if tls optimization is enabled. */
4126 unsigned int do_tls_opt:1;
4127
4128 /* Set on error. */
4129 unsigned int stub_error:1;
4130
4131 /* Whether func_desc_adjust needs to be run over symbols. */
4132 unsigned int need_func_desc_adj:1;
4133
4134 /* Whether there exist local gnu indirect function resolvers,
4135 referenced by dynamic relocations. */
4136 unsigned int local_ifunc_resolver:1;
4137 unsigned int maybe_local_ifunc_resolver:1;
4138
4139 /* Whether plt calls for ELFv2 localentry:0 funcs have been optimized. */
4140 unsigned int has_plt_localentry0:1;
4141
4142 /* Incremented every time we size stubs. */
4143 unsigned int stub_iteration;
4144
4145 /* Small local sym cache. */
4146 struct sym_cache sym_cache;
4147 };
4148
4149 /* Rename some of the generic section flags to better document how they
4150 are used here. */
4151
4152 /* Nonzero if this section has TLS related relocations. */
4153 #define has_tls_reloc sec_flg0
4154
4155 /* Nonzero if this section has a call to __tls_get_addr. */
4156 #define has_tls_get_addr_call sec_flg1
4157
4158 /* Nonzero if this section has any toc or got relocs. */
4159 #define has_toc_reloc sec_flg2
4160
4161 /* Nonzero if this section has a call to another section that uses
4162 the toc or got. */
4163 #define makes_toc_func_call sec_flg3
4164
4165 /* Recursion protection when determining above flag. */
4166 #define call_check_in_progress sec_flg4
4167 #define call_check_done sec_flg5
4168
4169 /* Get the ppc64 ELF linker hash table from a link_info structure. */
4170
4171 #define ppc_hash_table(p) \
4172 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
4173 == PPC64_ELF_DATA ? ((struct ppc_link_hash_table *) ((p)->hash)) : NULL)
4174
4175 #define ppc_stub_hash_lookup(table, string, create, copy) \
4176 ((struct ppc_stub_hash_entry *) \
4177 bfd_hash_lookup ((table), (string), (create), (copy)))
4178
4179 #define ppc_branch_hash_lookup(table, string, create, copy) \
4180 ((struct ppc_branch_hash_entry *) \
4181 bfd_hash_lookup ((table), (string), (create), (copy)))
4182
4183 /* Create an entry in the stub hash table. */
4184
4185 static struct bfd_hash_entry *
4186 stub_hash_newfunc (struct bfd_hash_entry *entry,
4187 struct bfd_hash_table *table,
4188 const char *string)
4189 {
4190 /* Allocate the structure if it has not already been allocated by a
4191 subclass. */
4192 if (entry == NULL)
4193 {
4194 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
4195 if (entry == NULL)
4196 return entry;
4197 }
4198
4199 /* Call the allocation method of the superclass. */
4200 entry = bfd_hash_newfunc (entry, table, string);
4201 if (entry != NULL)
4202 {
4203 struct ppc_stub_hash_entry *eh;
4204
4205 /* Initialize the local fields. */
4206 eh = (struct ppc_stub_hash_entry *) entry;
4207 eh->stub_type = ppc_stub_none;
4208 eh->group = NULL;
4209 eh->stub_offset = 0;
4210 eh->target_value = 0;
4211 eh->target_section = NULL;
4212 eh->h = NULL;
4213 eh->plt_ent = NULL;
4214 eh->other = 0;
4215 }
4216
4217 return entry;
4218 }
4219
4220 /* Create an entry in the branch hash table. */
4221
4222 static struct bfd_hash_entry *
4223 branch_hash_newfunc (struct bfd_hash_entry *entry,
4224 struct bfd_hash_table *table,
4225 const char *string)
4226 {
4227 /* Allocate the structure if it has not already been allocated by a
4228 subclass. */
4229 if (entry == NULL)
4230 {
4231 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
4232 if (entry == NULL)
4233 return entry;
4234 }
4235
4236 /* Call the allocation method of the superclass. */
4237 entry = bfd_hash_newfunc (entry, table, string);
4238 if (entry != NULL)
4239 {
4240 struct ppc_branch_hash_entry *eh;
4241
4242 /* Initialize the local fields. */
4243 eh = (struct ppc_branch_hash_entry *) entry;
4244 eh->offset = 0;
4245 eh->iter = 0;
4246 }
4247
4248 return entry;
4249 }
4250
4251 /* Create an entry in a ppc64 ELF linker hash table. */
4252
4253 static struct bfd_hash_entry *
4254 link_hash_newfunc (struct bfd_hash_entry *entry,
4255 struct bfd_hash_table *table,
4256 const char *string)
4257 {
4258 /* Allocate the structure if it has not already been allocated by a
4259 subclass. */
4260 if (entry == NULL)
4261 {
4262 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
4263 if (entry == NULL)
4264 return entry;
4265 }
4266
4267 /* Call the allocation method of the superclass. */
4268 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
4269 if (entry != NULL)
4270 {
4271 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
4272
4273 memset (&eh->u.stub_cache, 0,
4274 (sizeof (struct ppc_link_hash_entry)
4275 - offsetof (struct ppc_link_hash_entry, u.stub_cache)));
4276
4277 /* When making function calls, old ABI code references function entry
4278 points (dot symbols), while new ABI code references the function
4279 descriptor symbol. We need to make any combination of reference and
4280 definition work together, without breaking archive linking.
4281
4282 For a defined function "foo" and an undefined call to "bar":
4283 An old object defines "foo" and ".foo", references ".bar" (possibly
4284 "bar" too).
4285 A new object defines "foo" and references "bar".
4286
4287 A new object thus has no problem with its undefined symbols being
4288 satisfied by definitions in an old object. On the other hand, the
4289 old object won't have ".bar" satisfied by a new object.
4290
4291 Keep a list of newly added dot-symbols. */
4292
4293 if (string[0] == '.')
4294 {
4295 struct ppc_link_hash_table *htab;
4296
4297 htab = (struct ppc_link_hash_table *) table;
4298 eh->u.next_dot_sym = htab->dot_syms;
4299 htab->dot_syms = eh;
4300 }
4301 }
4302
4303 return entry;
4304 }
4305
4306 struct tocsave_entry {
4307 asection *sec;
4308 bfd_vma offset;
4309 };
4310
4311 static hashval_t
4312 tocsave_htab_hash (const void *p)
4313 {
4314 const struct tocsave_entry *e = (const struct tocsave_entry *) p;
4315 return ((bfd_vma) (intptr_t) e->sec ^ e->offset) >> 3;
4316 }
4317
4318 static int
4319 tocsave_htab_eq (const void *p1, const void *p2)
4320 {
4321 const struct tocsave_entry *e1 = (const struct tocsave_entry *) p1;
4322 const struct tocsave_entry *e2 = (const struct tocsave_entry *) p2;
4323 return e1->sec == e2->sec && e1->offset == e2->offset;
4324 }
4325
4326 /* Destroy a ppc64 ELF linker hash table. */
4327
4328 static void
4329 ppc64_elf_link_hash_table_free (bfd *obfd)
4330 {
4331 struct ppc_link_hash_table *htab;
4332
4333 htab = (struct ppc_link_hash_table *) obfd->link.hash;
4334 if (htab->tocsave_htab)
4335 htab_delete (htab->tocsave_htab);
4336 bfd_hash_table_free (&htab->branch_hash_table);
4337 bfd_hash_table_free (&htab->stub_hash_table);
4338 _bfd_elf_link_hash_table_free (obfd);
4339 }
4340
4341 /* Create a ppc64 ELF linker hash table. */
4342
4343 static struct bfd_link_hash_table *
4344 ppc64_elf_link_hash_table_create (bfd *abfd)
4345 {
4346 struct ppc_link_hash_table *htab;
4347 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
4348
4349 htab = bfd_zmalloc (amt);
4350 if (htab == NULL)
4351 return NULL;
4352
4353 if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc,
4354 sizeof (struct ppc_link_hash_entry),
4355 PPC64_ELF_DATA))
4356 {
4357 free (htab);
4358 return NULL;
4359 }
4360
4361 /* Init the stub hash table too. */
4362 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc,
4363 sizeof (struct ppc_stub_hash_entry)))
4364 {
4365 _bfd_elf_link_hash_table_free (abfd);
4366 return NULL;
4367 }
4368
4369 /* And the branch hash table. */
4370 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc,
4371 sizeof (struct ppc_branch_hash_entry)))
4372 {
4373 bfd_hash_table_free (&htab->stub_hash_table);
4374 _bfd_elf_link_hash_table_free (abfd);
4375 return NULL;
4376 }
4377
4378 htab->tocsave_htab = htab_try_create (1024,
4379 tocsave_htab_hash,
4380 tocsave_htab_eq,
4381 NULL);
4382 if (htab->tocsave_htab == NULL)
4383 {
4384 ppc64_elf_link_hash_table_free (abfd);
4385 return NULL;
4386 }
4387 htab->elf.root.hash_table_free = ppc64_elf_link_hash_table_free;
4388
4389 /* Initializing two fields of the union is just cosmetic. We really
4390 only care about glist, but when compiled on a 32-bit host the
4391 bfd_vma fields are larger. Setting the bfd_vma to zero makes
4392 debugger inspection of these fields look nicer. */
4393 htab->elf.init_got_refcount.refcount = 0;
4394 htab->elf.init_got_refcount.glist = NULL;
4395 htab->elf.init_plt_refcount.refcount = 0;
4396 htab->elf.init_plt_refcount.glist = NULL;
4397 htab->elf.init_got_offset.offset = 0;
4398 htab->elf.init_got_offset.glist = NULL;
4399 htab->elf.init_plt_offset.offset = 0;
4400 htab->elf.init_plt_offset.glist = NULL;
4401
4402 return &htab->elf.root;
4403 }
4404
4405 /* Create sections for linker generated code. */
4406
4407 static bfd_boolean
4408 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
4409 {
4410 struct ppc_link_hash_table *htab;
4411 flagword flags;
4412
4413 htab = ppc_hash_table (info);
4414
4415 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
4416 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4417 if (htab->params->save_restore_funcs)
4418 {
4419 /* Create .sfpr for code to save and restore fp regs. */
4420 htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr",
4421 flags);
4422 if (htab->sfpr == NULL
4423 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
4424 return FALSE;
4425 }
4426
4427 if (bfd_link_relocatable (info))
4428 return TRUE;
4429
4430 /* Create .glink for lazy dynamic linking support. */
4431 htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink",
4432 flags);
4433 if (htab->glink == NULL
4434 || ! bfd_set_section_alignment (dynobj, htab->glink, 3))
4435 return FALSE;
4436
4437 if (!info->no_ld_generated_unwind_info)
4438 {
4439 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
4440 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4441 htab->glink_eh_frame = bfd_make_section_anyway_with_flags (dynobj,
4442 ".eh_frame",
4443 flags);
4444 if (htab->glink_eh_frame == NULL
4445 || !bfd_set_section_alignment (dynobj, htab->glink_eh_frame, 2))
4446 return FALSE;
4447 }
4448
4449 flags = SEC_ALLOC | SEC_LINKER_CREATED;
4450 htab->elf.iplt = bfd_make_section_anyway_with_flags (dynobj, ".iplt", flags);
4451 if (htab->elf.iplt == NULL
4452 || ! bfd_set_section_alignment (dynobj, htab->elf.iplt, 3))
4453 return FALSE;
4454
4455 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4456 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4457 htab->elf.irelplt
4458 = bfd_make_section_anyway_with_flags (dynobj, ".rela.iplt", flags);
4459 if (htab->elf.irelplt == NULL
4460 || ! bfd_set_section_alignment (dynobj, htab->elf.irelplt, 3))
4461 return FALSE;
4462
4463 /* Create branch lookup table for plt_branch stubs. */
4464 flags = (SEC_ALLOC | SEC_LOAD
4465 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4466 htab->brlt = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt",
4467 flags);
4468 if (htab->brlt == NULL
4469 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
4470 return FALSE;
4471
4472 if (!bfd_link_pic (info))
4473 return TRUE;
4474
4475 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4476 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4477 htab->relbrlt = bfd_make_section_anyway_with_flags (dynobj,
4478 ".rela.branch_lt",
4479 flags);
4480 if (htab->relbrlt == NULL
4481 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
4482 return FALSE;
4483
4484 return TRUE;
4485 }
4486
4487 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
4488
4489 bfd_boolean
4490 ppc64_elf_init_stub_bfd (struct bfd_link_info *info,
4491 struct ppc64_elf_params *params)
4492 {
4493 struct ppc_link_hash_table *htab;
4494
4495 elf_elfheader (params->stub_bfd)->e_ident[EI_CLASS] = ELFCLASS64;
4496
4497 /* Always hook our dynamic sections into the first bfd, which is the
4498 linker created stub bfd. This ensures that the GOT header is at
4499 the start of the output TOC section. */
4500 htab = ppc_hash_table (info);
4501 htab->elf.dynobj = params->stub_bfd;
4502 htab->params = params;
4503
4504 return create_linkage_sections (htab->elf.dynobj, info);
4505 }
4506
4507 /* Build a name for an entry in the stub hash table. */
4508
4509 static char *
4510 ppc_stub_name (const asection *input_section,
4511 const asection *sym_sec,
4512 const struct ppc_link_hash_entry *h,
4513 const Elf_Internal_Rela *rel)
4514 {
4515 char *stub_name;
4516 ssize_t len;
4517
4518 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
4519 offsets from a sym as a branch target? In fact, we could
4520 probably assume the addend is always zero. */
4521 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
4522
4523 if (h)
4524 {
4525 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
4526 stub_name = bfd_malloc (len);
4527 if (stub_name == NULL)
4528 return stub_name;
4529
4530 len = sprintf (stub_name, "%08x.%s+%x",
4531 input_section->id & 0xffffffff,
4532 h->elf.root.root.string,
4533 (int) rel->r_addend & 0xffffffff);
4534 }
4535 else
4536 {
4537 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
4538 stub_name = bfd_malloc (len);
4539 if (stub_name == NULL)
4540 return stub_name;
4541
4542 len = sprintf (stub_name, "%08x.%x:%x+%x",
4543 input_section->id & 0xffffffff,
4544 sym_sec->id & 0xffffffff,
4545 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
4546 (int) rel->r_addend & 0xffffffff);
4547 }
4548 if (len > 2 && stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
4549 stub_name[len - 2] = 0;
4550 return stub_name;
4551 }
4552
4553 /* Look up an entry in the stub hash. Stub entries are cached because
4554 creating the stub name takes a bit of time. */
4555
4556 static struct ppc_stub_hash_entry *
4557 ppc_get_stub_entry (const asection *input_section,
4558 const asection *sym_sec,
4559 struct ppc_link_hash_entry *h,
4560 const Elf_Internal_Rela *rel,
4561 struct ppc_link_hash_table *htab)
4562 {
4563 struct ppc_stub_hash_entry *stub_entry;
4564 struct map_stub *group;
4565
4566 /* If this input section is part of a group of sections sharing one
4567 stub section, then use the id of the first section in the group.
4568 Stub names need to include a section id, as there may well be
4569 more than one stub used to reach say, printf, and we need to
4570 distinguish between them. */
4571 group = htab->sec_info[input_section->id].u.group;
4572 if (group == NULL)
4573 return NULL;
4574
4575 if (h != NULL && h->u.stub_cache != NULL
4576 && h->u.stub_cache->h == h
4577 && h->u.stub_cache->group == group)
4578 {
4579 stub_entry = h->u.stub_cache;
4580 }
4581 else
4582 {
4583 char *stub_name;
4584
4585 stub_name = ppc_stub_name (group->link_sec, sym_sec, h, rel);
4586 if (stub_name == NULL)
4587 return NULL;
4588
4589 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
4590 stub_name, FALSE, FALSE);
4591 if (h != NULL)
4592 h->u.stub_cache = stub_entry;
4593
4594 free (stub_name);
4595 }
4596
4597 return stub_entry;
4598 }
4599
4600 /* Add a new stub entry to the stub hash. Not all fields of the new
4601 stub entry are initialised. */
4602
4603 static struct ppc_stub_hash_entry *
4604 ppc_add_stub (const char *stub_name,
4605 asection *section,
4606 struct bfd_link_info *info)
4607 {
4608 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4609 struct map_stub *group;
4610 asection *link_sec;
4611 asection *stub_sec;
4612 struct ppc_stub_hash_entry *stub_entry;
4613
4614 group = htab->sec_info[section->id].u.group;
4615 link_sec = group->link_sec;
4616 stub_sec = group->stub_sec;
4617 if (stub_sec == NULL)
4618 {
4619 size_t namelen;
4620 bfd_size_type len;
4621 char *s_name;
4622
4623 namelen = strlen (link_sec->name);
4624 len = namelen + sizeof (STUB_SUFFIX);
4625 s_name = bfd_alloc (htab->params->stub_bfd, len);
4626 if (s_name == NULL)
4627 return NULL;
4628
4629 memcpy (s_name, link_sec->name, namelen);
4630 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
4631 stub_sec = (*htab->params->add_stub_section) (s_name, link_sec);
4632 if (stub_sec == NULL)
4633 return NULL;
4634 group->stub_sec = stub_sec;
4635 }
4636
4637 /* Enter this entry into the linker stub hash table. */
4638 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
4639 TRUE, FALSE);
4640 if (stub_entry == NULL)
4641 {
4642 /* xgettext:c-format */
4643 info->callbacks->einfo (_("%P: %B: cannot create stub entry %s\n"),
4644 section->owner, stub_name);
4645 return NULL;
4646 }
4647
4648 stub_entry->group = group;
4649 stub_entry->stub_offset = 0;
4650 return stub_entry;
4651 }
4652
4653 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
4654 not already done. */
4655
4656 static bfd_boolean
4657 create_got_section (bfd *abfd, struct bfd_link_info *info)
4658 {
4659 asection *got, *relgot;
4660 flagword flags;
4661 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4662
4663 if (!is_ppc64_elf (abfd))
4664 return FALSE;
4665 if (htab == NULL)
4666 return FALSE;
4667
4668 if (!htab->elf.sgot
4669 && !_bfd_elf_create_got_section (htab->elf.dynobj, info))
4670 return FALSE;
4671
4672 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
4673 | SEC_LINKER_CREATED);
4674
4675 got = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
4676 if (!got
4677 || !bfd_set_section_alignment (abfd, got, 3))
4678 return FALSE;
4679
4680 relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got",
4681 flags | SEC_READONLY);
4682 if (!relgot
4683 || ! bfd_set_section_alignment (abfd, relgot, 3))
4684 return FALSE;
4685
4686 ppc64_elf_tdata (abfd)->got = got;
4687 ppc64_elf_tdata (abfd)->relgot = relgot;
4688 return TRUE;
4689 }
4690
4691 /* Follow indirect and warning symbol links. */
4692
4693 static inline struct bfd_link_hash_entry *
4694 follow_link (struct bfd_link_hash_entry *h)
4695 {
4696 while (h->type == bfd_link_hash_indirect
4697 || h->type == bfd_link_hash_warning)
4698 h = h->u.i.link;
4699 return h;
4700 }
4701
4702 static inline struct elf_link_hash_entry *
4703 elf_follow_link (struct elf_link_hash_entry *h)
4704 {
4705 return (struct elf_link_hash_entry *) follow_link (&h->root);
4706 }
4707
4708 static inline struct ppc_link_hash_entry *
4709 ppc_follow_link (struct ppc_link_hash_entry *h)
4710 {
4711 return (struct ppc_link_hash_entry *) follow_link (&h->elf.root);
4712 }
4713
4714 /* Merge PLT info on FROM with that on TO. */
4715
4716 static void
4717 move_plt_plist (struct ppc_link_hash_entry *from,
4718 struct ppc_link_hash_entry *to)
4719 {
4720 if (from->elf.plt.plist != NULL)
4721 {
4722 if (to->elf.plt.plist != NULL)
4723 {
4724 struct plt_entry **entp;
4725 struct plt_entry *ent;
4726
4727 for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; )
4728 {
4729 struct plt_entry *dent;
4730
4731 for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next)
4732 if (dent->addend == ent->addend)
4733 {
4734 dent->plt.refcount += ent->plt.refcount;
4735 *entp = ent->next;
4736 break;
4737 }
4738 if (dent == NULL)
4739 entp = &ent->next;
4740 }
4741 *entp = to->elf.plt.plist;
4742 }
4743
4744 to->elf.plt.plist = from->elf.plt.plist;
4745 from->elf.plt.plist = NULL;
4746 }
4747 }
4748
4749 /* Copy the extra info we tack onto an elf_link_hash_entry. */
4750
4751 static void
4752 ppc64_elf_copy_indirect_symbol (struct bfd_link_info *info,
4753 struct elf_link_hash_entry *dir,
4754 struct elf_link_hash_entry *ind)
4755 {
4756 struct ppc_link_hash_entry *edir, *eind;
4757
4758 edir = (struct ppc_link_hash_entry *) dir;
4759 eind = (struct ppc_link_hash_entry *) ind;
4760
4761 edir->is_func |= eind->is_func;
4762 edir->is_func_descriptor |= eind->is_func_descriptor;
4763 edir->tls_mask |= eind->tls_mask;
4764 if (eind->oh != NULL)
4765 edir->oh = ppc_follow_link (eind->oh);
4766
4767 /* If called to transfer flags for a weakdef during processing
4768 of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF.
4769 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
4770 if (!(ELIMINATE_COPY_RELOCS
4771 && eind->elf.root.type != bfd_link_hash_indirect
4772 && edir->elf.dynamic_adjusted))
4773 edir->elf.non_got_ref |= eind->elf.non_got_ref;
4774
4775 if (edir->elf.versioned != versioned_hidden)
4776 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
4777 edir->elf.ref_regular |= eind->elf.ref_regular;
4778 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
4779 edir->elf.needs_plt |= eind->elf.needs_plt;
4780 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed;
4781
4782 /* If we were called to copy over info for a weak sym, don't copy
4783 dyn_relocs, plt/got info, or dynindx. We used to copy dyn_relocs
4784 in order to simplify readonly_dynrelocs and save a field in the
4785 symbol hash entry, but that means dyn_relocs can't be used in any
4786 tests about a specific symbol, or affect other symbol flags which
4787 are then tested.
4788 Chain weakdefs so we can get from the weakdef back to an alias.
4789 The list is circular so that we don't need to use u.weakdef as
4790 well as this list to look at all aliases. */
4791 if (eind->elf.root.type != bfd_link_hash_indirect)
4792 {
4793 struct ppc_link_hash_entry *cur, *add, *next;
4794
4795 add = eind;
4796 do
4797 {
4798 cur = edir->weakref;
4799 if (cur != NULL)
4800 {
4801 do
4802 {
4803 /* We can be called twice for the same symbols.
4804 Don't make multiple loops. */
4805 if (cur == add)
4806 return;
4807 cur = cur->weakref;
4808 } while (cur != edir);
4809 }
4810 next = add->weakref;
4811 if (cur != add)
4812 {
4813 add->weakref = edir->weakref != NULL ? edir->weakref : edir;
4814 edir->weakref = add;
4815 }
4816 add = next;
4817 } while (add != NULL && add != eind);
4818 return;
4819 }
4820
4821 /* Copy over any dynamic relocs we may have on the indirect sym. */
4822 if (eind->dyn_relocs != NULL)
4823 {
4824 if (edir->dyn_relocs != NULL)
4825 {
4826 struct elf_dyn_relocs **pp;
4827 struct elf_dyn_relocs *p;
4828
4829 /* Add reloc counts against the indirect sym to the direct sym
4830 list. Merge any entries against the same section. */
4831 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
4832 {
4833 struct elf_dyn_relocs *q;
4834
4835 for (q = edir->dyn_relocs; q != NULL; q = q->next)
4836 if (q->sec == p->sec)
4837 {
4838 q->pc_count += p->pc_count;
4839 q->count += p->count;
4840 *pp = p->next;
4841 break;
4842 }
4843 if (q == NULL)
4844 pp = &p->next;
4845 }
4846 *pp = edir->dyn_relocs;
4847 }
4848
4849 edir->dyn_relocs = eind->dyn_relocs;
4850 eind->dyn_relocs = NULL;
4851 }
4852
4853 /* Copy over got entries that we may have already seen to the
4854 symbol which just became indirect. */
4855 if (eind->elf.got.glist != NULL)
4856 {
4857 if (edir->elf.got.glist != NULL)
4858 {
4859 struct got_entry **entp;
4860 struct got_entry *ent;
4861
4862 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
4863 {
4864 struct got_entry *dent;
4865
4866 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
4867 if (dent->addend == ent->addend
4868 && dent->owner == ent->owner
4869 && dent->tls_type == ent->tls_type)
4870 {
4871 dent->got.refcount += ent->got.refcount;
4872 *entp = ent->next;
4873 break;
4874 }
4875 if (dent == NULL)
4876 entp = &ent->next;
4877 }
4878 *entp = edir->elf.got.glist;
4879 }
4880
4881 edir->elf.got.glist = eind->elf.got.glist;
4882 eind->elf.got.glist = NULL;
4883 }
4884
4885 /* And plt entries. */
4886 move_plt_plist (eind, edir);
4887
4888 if (eind->elf.dynindx != -1)
4889 {
4890 if (edir->elf.dynindx != -1)
4891 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4892 edir->elf.dynstr_index);
4893 edir->elf.dynindx = eind->elf.dynindx;
4894 edir->elf.dynstr_index = eind->elf.dynstr_index;
4895 eind->elf.dynindx = -1;
4896 eind->elf.dynstr_index = 0;
4897 }
4898 }
4899
4900 /* Find the function descriptor hash entry from the given function code
4901 hash entry FH. Link the entries via their OH fields. */
4902
4903 static struct ppc_link_hash_entry *
4904 lookup_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
4905 {
4906 struct ppc_link_hash_entry *fdh = fh->oh;
4907
4908 if (fdh == NULL)
4909 {
4910 const char *fd_name = fh->elf.root.root.string + 1;
4911
4912 fdh = (struct ppc_link_hash_entry *)
4913 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
4914 if (fdh == NULL)
4915 return fdh;
4916
4917 fdh->is_func_descriptor = 1;
4918 fdh->oh = fh;
4919 fh->is_func = 1;
4920 fh->oh = fdh;
4921 }
4922
4923 fdh = ppc_follow_link (fdh);
4924 fdh->is_func_descriptor = 1;
4925 fdh->oh = fh;
4926 return fdh;
4927 }
4928
4929 /* Make a fake function descriptor sym for the undefined code sym FH. */
4930
4931 static struct ppc_link_hash_entry *
4932 make_fdh (struct bfd_link_info *info,
4933 struct ppc_link_hash_entry *fh)
4934 {
4935 bfd *abfd = fh->elf.root.u.undef.abfd;
4936 struct bfd_link_hash_entry *bh = NULL;
4937 struct ppc_link_hash_entry *fdh;
4938 flagword flags = (fh->elf.root.type == bfd_link_hash_undefweak
4939 ? BSF_WEAK
4940 : BSF_GLOBAL);
4941
4942 if (!_bfd_generic_link_add_one_symbol (info, abfd,
4943 fh->elf.root.root.string + 1,
4944 flags, bfd_und_section_ptr, 0,
4945 NULL, FALSE, FALSE, &bh))
4946 return NULL;
4947
4948 fdh = (struct ppc_link_hash_entry *) bh;
4949 fdh->elf.non_elf = 0;
4950 fdh->fake = 1;
4951 fdh->is_func_descriptor = 1;
4952 fdh->oh = fh;
4953 fh->is_func = 1;
4954 fh->oh = fdh;
4955 return fdh;
4956 }
4957
4958 /* Fix function descriptor symbols defined in .opd sections to be
4959 function type. */
4960
4961 static bfd_boolean
4962 ppc64_elf_add_symbol_hook (bfd *ibfd,
4963 struct bfd_link_info *info,
4964 Elf_Internal_Sym *isym,
4965 const char **name,
4966 flagword *flags ATTRIBUTE_UNUSED,
4967 asection **sec,
4968 bfd_vma *value)
4969 {
4970 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC
4971 && (ibfd->flags & DYNAMIC) == 0
4972 && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour)
4973 elf_tdata (info->output_bfd)->has_gnu_symbols |= elf_gnu_symbol_ifunc;
4974
4975 if (*sec != NULL
4976 && strcmp ((*sec)->name, ".opd") == 0)
4977 {
4978 asection *code_sec;
4979
4980 if (!(ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC
4981 || ELF_ST_TYPE (isym->st_info) == STT_FUNC))
4982 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
4983
4984 /* If the symbol is a function defined in .opd, and the function
4985 code is in a discarded group, let it appear to be undefined. */
4986 if (!bfd_link_relocatable (info)
4987 && (*sec)->reloc_count != 0
4988 && opd_entry_value (*sec, *value, &code_sec, NULL,
4989 FALSE) != (bfd_vma) -1
4990 && discarded_section (code_sec))
4991 {
4992 *sec = bfd_und_section_ptr;
4993 isym->st_shndx = SHN_UNDEF;
4994 }
4995 }
4996 else if (*sec != NULL
4997 && strcmp ((*sec)->name, ".toc") == 0
4998 && ELF_ST_TYPE (isym->st_info) == STT_OBJECT)
4999 {
5000 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5001 if (htab != NULL)
5002 htab->params->object_in_toc = 1;
5003 }
5004
5005 if ((STO_PPC64_LOCAL_MASK & isym->st_other) != 0)
5006 {
5007 if (abiversion (ibfd) == 0)
5008 set_abiversion (ibfd, 2);
5009 else if (abiversion (ibfd) == 1)
5010 {
5011 info->callbacks->einfo (_("%P: symbol '%s' has invalid st_other"
5012 " for ABI version 1\n"), name);
5013 bfd_set_error (bfd_error_bad_value);
5014 return FALSE;
5015 }
5016 }
5017
5018 return TRUE;
5019 }
5020
5021 /* Merge non-visibility st_other attributes: local entry point. */
5022
5023 static void
5024 ppc64_elf_merge_symbol_attribute (struct elf_link_hash_entry *h,
5025 const Elf_Internal_Sym *isym,
5026 bfd_boolean definition,
5027 bfd_boolean dynamic)
5028 {
5029 if (definition && (!dynamic || !h->def_regular))
5030 h->other = ((isym->st_other & ~ELF_ST_VISIBILITY (-1))
5031 | ELF_ST_VISIBILITY (h->other));
5032 }
5033
5034 /* Hook called on merging a symbol. We use this to clear "fake" since
5035 we now have a real symbol. */
5036
5037 static bfd_boolean
5038 ppc64_elf_merge_symbol (struct elf_link_hash_entry *h,
5039 const Elf_Internal_Sym *isym,
5040 asection **psec ATTRIBUTE_UNUSED,
5041 bfd_boolean newdef ATTRIBUTE_UNUSED,
5042 bfd_boolean olddef ATTRIBUTE_UNUSED,
5043 bfd *oldbfd ATTRIBUTE_UNUSED,
5044 const asection *oldsec ATTRIBUTE_UNUSED)
5045 {
5046 ((struct ppc_link_hash_entry *) h)->fake = 0;
5047 if ((STO_PPC64_LOCAL_MASK & isym->st_other) != 0)
5048 ((struct ppc_link_hash_entry *) h)->non_zero_localentry = 1;
5049 return TRUE;
5050 }
5051
5052 /* This function makes an old ABI object reference to ".bar" cause the
5053 inclusion of a new ABI object archive that defines "bar".
5054 NAME is a symbol defined in an archive. Return a symbol in the hash
5055 table that might be satisfied by the archive symbols. */
5056
5057 static struct elf_link_hash_entry *
5058 ppc64_elf_archive_symbol_lookup (bfd *abfd,
5059 struct bfd_link_info *info,
5060 const char *name)
5061 {
5062 struct elf_link_hash_entry *h;
5063 char *dot_name;
5064 size_t len;
5065
5066 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
5067 if (h != NULL
5068 /* Don't return this sym if it is a fake function descriptor
5069 created by add_symbol_adjust. */
5070 && !((struct ppc_link_hash_entry *) h)->fake)
5071 return h;
5072
5073 if (name[0] == '.')
5074 return h;
5075
5076 len = strlen (name);
5077 dot_name = bfd_alloc (abfd, len + 2);
5078 if (dot_name == NULL)
5079 return (struct elf_link_hash_entry *) 0 - 1;
5080 dot_name[0] = '.';
5081 memcpy (dot_name + 1, name, len + 1);
5082 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
5083 bfd_release (abfd, dot_name);
5084 return h;
5085 }
5086
5087 /* This function satisfies all old ABI object references to ".bar" if a
5088 new ABI object defines "bar". Well, at least, undefined dot symbols
5089 are made weak. This stops later archive searches from including an
5090 object if we already have a function descriptor definition. It also
5091 prevents the linker complaining about undefined symbols.
5092 We also check and correct mismatched symbol visibility here. The
5093 most restrictive visibility of the function descriptor and the
5094 function entry symbol is used. */
5095
5096 static bfd_boolean
5097 add_symbol_adjust (struct ppc_link_hash_entry *eh, struct bfd_link_info *info)
5098 {
5099 struct ppc_link_hash_table *htab;
5100 struct ppc_link_hash_entry *fdh;
5101
5102 if (eh->elf.root.type == bfd_link_hash_warning)
5103 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
5104
5105 if (eh->elf.root.type == bfd_link_hash_indirect)
5106 return TRUE;
5107
5108 if (eh->elf.root.root.string[0] != '.')
5109 abort ();
5110
5111 htab = ppc_hash_table (info);
5112 if (htab == NULL)
5113 return FALSE;
5114
5115 fdh = lookup_fdh (eh, htab);
5116 if (fdh == NULL
5117 && !bfd_link_relocatable (info)
5118 && (eh->elf.root.type == bfd_link_hash_undefined
5119 || eh->elf.root.type == bfd_link_hash_undefweak)
5120 && eh->elf.ref_regular)
5121 {
5122 /* Make an undefined function descriptor sym, in order to
5123 pull in an --as-needed shared lib. Archives are handled
5124 elsewhere. */
5125 fdh = make_fdh (info, eh);
5126 if (fdh == NULL)
5127 return FALSE;
5128 }
5129
5130 if (fdh != NULL)
5131 {
5132 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
5133 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
5134
5135 /* Make both descriptor and entry symbol have the most
5136 constraining visibility of either symbol. */
5137 if (entry_vis < descr_vis)
5138 fdh->elf.other += entry_vis - descr_vis;
5139 else if (entry_vis > descr_vis)
5140 eh->elf.other += descr_vis - entry_vis;
5141
5142 /* Propagate reference flags from entry symbol to function
5143 descriptor symbol. */
5144 fdh->elf.root.non_ir_ref_regular |= eh->elf.root.non_ir_ref_regular;
5145 fdh->elf.root.non_ir_ref_dynamic |= eh->elf.root.non_ir_ref_dynamic;
5146 fdh->elf.ref_regular |= eh->elf.ref_regular;
5147 fdh->elf.ref_regular_nonweak |= eh->elf.ref_regular_nonweak;
5148
5149 if (!fdh->elf.forced_local
5150 && fdh->elf.dynindx == -1
5151 && fdh->elf.versioned != versioned_hidden
5152 && (bfd_link_dll (info)
5153 || fdh->elf.def_dynamic
5154 || fdh->elf.ref_dynamic)
5155 && (eh->elf.ref_regular
5156 || eh->elf.def_regular))
5157 {
5158 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
5159 return FALSE;
5160 }
5161 }
5162
5163 return TRUE;
5164 }
5165
5166 /* Set up opd section info and abiversion for IBFD, and process list
5167 of dot-symbols we made in link_hash_newfunc. */
5168
5169 static bfd_boolean
5170 ppc64_elf_before_check_relocs (bfd *ibfd, struct bfd_link_info *info)
5171 {
5172 struct ppc_link_hash_table *htab;
5173 struct ppc_link_hash_entry **p, *eh;
5174 asection *opd = bfd_get_section_by_name (ibfd, ".opd");
5175
5176 if (opd != NULL && opd->size != 0)
5177 {
5178 BFD_ASSERT (ppc64_elf_section_data (opd)->sec_type == sec_normal);
5179 ppc64_elf_section_data (opd)->sec_type = sec_opd;
5180
5181 if (abiversion (ibfd) == 0)
5182 set_abiversion (ibfd, 1);
5183 else if (abiversion (ibfd) >= 2)
5184 {
5185 /* xgettext:c-format */
5186 info->callbacks->einfo (_("%P: %B .opd not allowed in ABI"
5187 " version %d\n"),
5188 ibfd, abiversion (ibfd));
5189 bfd_set_error (bfd_error_bad_value);
5190 return FALSE;
5191 }
5192 }
5193
5194 if (is_ppc64_elf (info->output_bfd))
5195 {
5196 /* For input files without an explicit abiversion in e_flags
5197 we should have flagged any with symbol st_other bits set
5198 as ELFv1 and above flagged those with .opd as ELFv2.
5199 Set the output abiversion if not yet set, and for any input
5200 still ambiguous, take its abiversion from the output.
5201 Differences in ABI are reported later. */
5202 if (abiversion (info->output_bfd) == 0)
5203 set_abiversion (info->output_bfd, abiversion (ibfd));
5204 else if (abiversion (ibfd) == 0)
5205 set_abiversion (ibfd, abiversion (info->output_bfd));
5206 }
5207
5208 htab = ppc_hash_table (info);
5209 if (htab == NULL)
5210 return TRUE;
5211
5212 if (opd != NULL && opd->size != 0
5213 && (ibfd->flags & DYNAMIC) == 0
5214 && (opd->flags & SEC_RELOC) != 0
5215 && opd->reloc_count != 0
5216 && !bfd_is_abs_section (opd->output_section)
5217 && info->gc_sections)
5218 {
5219 /* Garbage collection needs some extra help with .opd sections.
5220 We don't want to necessarily keep everything referenced by
5221 relocs in .opd, as that would keep all functions. Instead,
5222 if we reference an .opd symbol (a function descriptor), we
5223 want to keep the function code symbol's section. This is
5224 easy for global symbols, but for local syms we need to keep
5225 information about the associated function section. */
5226 bfd_size_type amt;
5227 asection **opd_sym_map;
5228 Elf_Internal_Shdr *symtab_hdr;
5229 Elf_Internal_Rela *relocs, *rel_end, *rel;
5230
5231 amt = OPD_NDX (opd->size) * sizeof (*opd_sym_map);
5232 opd_sym_map = bfd_zalloc (ibfd, amt);
5233 if (opd_sym_map == NULL)
5234 return FALSE;
5235 ppc64_elf_section_data (opd)->u.opd.func_sec = opd_sym_map;
5236 relocs = _bfd_elf_link_read_relocs (ibfd, opd, NULL, NULL,
5237 info->keep_memory);
5238 if (relocs == NULL)
5239 return FALSE;
5240 symtab_hdr = &elf_symtab_hdr (ibfd);
5241 rel_end = relocs + opd->reloc_count - 1;
5242 for (rel = relocs; rel < rel_end; rel++)
5243 {
5244 enum elf_ppc64_reloc_type r_type = ELF64_R_TYPE (rel->r_info);
5245 unsigned long r_symndx = ELF64_R_SYM (rel->r_info);
5246
5247 if (r_type == R_PPC64_ADDR64
5248 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC
5249 && r_symndx < symtab_hdr->sh_info)
5250 {
5251 Elf_Internal_Sym *isym;
5252 asection *s;
5253
5254 isym = bfd_sym_from_r_symndx (&htab->sym_cache, ibfd, r_symndx);
5255 if (isym == NULL)
5256 {
5257 if (elf_section_data (opd)->relocs != relocs)
5258 free (relocs);
5259 return FALSE;
5260 }
5261
5262 s = bfd_section_from_elf_index (ibfd, isym->st_shndx);
5263 if (s != NULL && s != opd)
5264 opd_sym_map[OPD_NDX (rel->r_offset)] = s;
5265 }
5266 }
5267 if (elf_section_data (opd)->relocs != relocs)
5268 free (relocs);
5269 }
5270
5271 p = &htab->dot_syms;
5272 while ((eh = *p) != NULL)
5273 {
5274 *p = NULL;
5275 if (&eh->elf == htab->elf.hgot)
5276 ;
5277 else if (htab->elf.hgot == NULL
5278 && strcmp (eh->elf.root.root.string, ".TOC.") == 0)
5279 htab->elf.hgot = &eh->elf;
5280 else if (abiversion (ibfd) <= 1)
5281 {
5282 htab->need_func_desc_adj = 1;
5283 if (!add_symbol_adjust (eh, info))
5284 return FALSE;
5285 }
5286 p = &eh->u.next_dot_sym;
5287 }
5288 return TRUE;
5289 }
5290
5291 /* Undo hash table changes when an --as-needed input file is determined
5292 not to be needed. */
5293
5294 static bfd_boolean
5295 ppc64_elf_notice_as_needed (bfd *ibfd,
5296 struct bfd_link_info *info,
5297 enum notice_asneeded_action act)
5298 {
5299 if (act == notice_not_needed)
5300 {
5301 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5302
5303 if (htab == NULL)
5304 return FALSE;
5305
5306 htab->dot_syms = NULL;
5307 }
5308 return _bfd_elf_notice_as_needed (ibfd, info, act);
5309 }
5310
5311 /* If --just-symbols against a final linked binary, then assume we need
5312 toc adjusting stubs when calling functions defined there. */
5313
5314 static void
5315 ppc64_elf_link_just_syms (asection *sec, struct bfd_link_info *info)
5316 {
5317 if ((sec->flags & SEC_CODE) != 0
5318 && (sec->owner->flags & (EXEC_P | DYNAMIC)) != 0
5319 && is_ppc64_elf (sec->owner))
5320 {
5321 if (abiversion (sec->owner) >= 2
5322 || bfd_get_section_by_name (sec->owner, ".opd") != NULL)
5323 sec->has_toc_reloc = 1;
5324 }
5325 _bfd_elf_link_just_syms (sec, info);
5326 }
5327
5328 static struct plt_entry **
5329 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
5330 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
5331 {
5332 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
5333 struct plt_entry **local_plt;
5334 unsigned char *local_got_tls_masks;
5335
5336 if (local_got_ents == NULL)
5337 {
5338 bfd_size_type size = symtab_hdr->sh_info;
5339
5340 size *= (sizeof (*local_got_ents)
5341 + sizeof (*local_plt)
5342 + sizeof (*local_got_tls_masks));
5343 local_got_ents = bfd_zalloc (abfd, size);
5344 if (local_got_ents == NULL)
5345 return NULL;
5346 elf_local_got_ents (abfd) = local_got_ents;
5347 }
5348
5349 if ((tls_type & (PLT_IFUNC | TLS_EXPLICIT)) == 0)
5350 {
5351 struct got_entry *ent;
5352
5353 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
5354 if (ent->addend == r_addend
5355 && ent->owner == abfd
5356 && ent->tls_type == tls_type)
5357 break;
5358 if (ent == NULL)
5359 {
5360 bfd_size_type amt = sizeof (*ent);
5361 ent = bfd_alloc (abfd, amt);
5362 if (ent == NULL)
5363 return FALSE;
5364 ent->next = local_got_ents[r_symndx];
5365 ent->addend = r_addend;
5366 ent->owner = abfd;
5367 ent->tls_type = tls_type;
5368 ent->is_indirect = FALSE;
5369 ent->got.refcount = 0;
5370 local_got_ents[r_symndx] = ent;
5371 }
5372 ent->got.refcount += 1;
5373 }
5374
5375 local_plt = (struct plt_entry **) (local_got_ents + symtab_hdr->sh_info);
5376 local_got_tls_masks = (unsigned char *) (local_plt + symtab_hdr->sh_info);
5377 local_got_tls_masks[r_symndx] |= tls_type;
5378
5379 return local_plt + r_symndx;
5380 }
5381
5382 static bfd_boolean
5383 update_plt_info (bfd *abfd, struct plt_entry **plist, bfd_vma addend)
5384 {
5385 struct plt_entry *ent;
5386
5387 for (ent = *plist; ent != NULL; ent = ent->next)
5388 if (ent->addend == addend)
5389 break;
5390 if (ent == NULL)
5391 {
5392 bfd_size_type amt = sizeof (*ent);
5393 ent = bfd_alloc (abfd, amt);
5394 if (ent == NULL)
5395 return FALSE;
5396 ent->next = *plist;
5397 ent->addend = addend;
5398 ent->plt.refcount = 0;
5399 *plist = ent;
5400 }
5401 ent->plt.refcount += 1;
5402 return TRUE;
5403 }
5404
5405 static bfd_boolean
5406 is_branch_reloc (enum elf_ppc64_reloc_type r_type)
5407 {
5408 return (r_type == R_PPC64_REL24
5409 || r_type == R_PPC64_REL14
5410 || r_type == R_PPC64_REL14_BRTAKEN
5411 || r_type == R_PPC64_REL14_BRNTAKEN
5412 || r_type == R_PPC64_ADDR24
5413 || r_type == R_PPC64_ADDR14
5414 || r_type == R_PPC64_ADDR14_BRTAKEN
5415 || r_type == R_PPC64_ADDR14_BRNTAKEN);
5416 }
5417
5418 /* Look through the relocs for a section during the first phase, and
5419 calculate needed space in the global offset table, procedure
5420 linkage table, and dynamic reloc sections. */
5421
5422 static bfd_boolean
5423 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
5424 asection *sec, const Elf_Internal_Rela *relocs)
5425 {
5426 struct ppc_link_hash_table *htab;
5427 Elf_Internal_Shdr *symtab_hdr;
5428 struct elf_link_hash_entry **sym_hashes;
5429 const Elf_Internal_Rela *rel;
5430 const Elf_Internal_Rela *rel_end;
5431 asection *sreloc;
5432 struct elf_link_hash_entry *tga, *dottga;
5433 bfd_boolean is_opd;
5434
5435 if (bfd_link_relocatable (info))
5436 return TRUE;
5437
5438 /* Don't do anything special with non-loaded, non-alloced sections.
5439 In particular, any relocs in such sections should not affect GOT
5440 and PLT reference counting (ie. we don't allow them to create GOT
5441 or PLT entries), there's no possibility or desire to optimize TLS
5442 relocs, and there's not much point in propagating relocs to shared
5443 libs that the dynamic linker won't relocate. */
5444 if ((sec->flags & SEC_ALLOC) == 0)
5445 return TRUE;
5446
5447 BFD_ASSERT (is_ppc64_elf (abfd));
5448
5449 htab = ppc_hash_table (info);
5450 if (htab == NULL)
5451 return FALSE;
5452
5453 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
5454 FALSE, FALSE, TRUE);
5455 dottga = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
5456 FALSE, FALSE, TRUE);
5457 symtab_hdr = &elf_symtab_hdr (abfd);
5458 sym_hashes = elf_sym_hashes (abfd);
5459 sreloc = NULL;
5460 is_opd = ppc64_elf_section_data (sec)->sec_type == sec_opd;
5461 rel_end = relocs + sec->reloc_count;
5462 for (rel = relocs; rel < rel_end; rel++)
5463 {
5464 unsigned long r_symndx;
5465 struct elf_link_hash_entry *h;
5466 enum elf_ppc64_reloc_type r_type;
5467 int tls_type;
5468 struct _ppc64_elf_section_data *ppc64_sec;
5469 struct plt_entry **ifunc, **plt_list;
5470
5471 r_symndx = ELF64_R_SYM (rel->r_info);
5472 if (r_symndx < symtab_hdr->sh_info)
5473 h = NULL;
5474 else
5475 {
5476 struct ppc_link_hash_entry *eh;
5477
5478 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5479 h = elf_follow_link (h);
5480 eh = (struct ppc_link_hash_entry *) h;
5481
5482 /* PR15323, ref flags aren't set for references in the same
5483 object. */
5484 h->root.non_ir_ref_regular = 1;
5485 if (eh->is_func && eh->oh != NULL)
5486 eh->oh->elf.root.non_ir_ref_regular = 1;
5487
5488 if (h == htab->elf.hgot)
5489 sec->has_toc_reloc = 1;
5490 }
5491
5492 tls_type = 0;
5493 ifunc = NULL;
5494 if (h != NULL)
5495 {
5496 if (h->type == STT_GNU_IFUNC)
5497 {
5498 h->needs_plt = 1;
5499 ifunc = &h->plt.plist;
5500 }
5501 }
5502 else
5503 {
5504 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5505 abfd, r_symndx);
5506 if (isym == NULL)
5507 return FALSE;
5508
5509 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
5510 {
5511 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
5512 rel->r_addend, PLT_IFUNC);
5513 if (ifunc == NULL)
5514 return FALSE;
5515 }
5516 }
5517
5518 r_type = ELF64_R_TYPE (rel->r_info);
5519 switch (r_type)
5520 {
5521 case R_PPC64_TLSGD:
5522 case R_PPC64_TLSLD:
5523 /* These special tls relocs tie a call to __tls_get_addr with
5524 its parameter symbol. */
5525 break;
5526
5527 case R_PPC64_GOT_TLSLD16:
5528 case R_PPC64_GOT_TLSLD16_LO:
5529 case R_PPC64_GOT_TLSLD16_HI:
5530 case R_PPC64_GOT_TLSLD16_HA:
5531 tls_type = TLS_TLS | TLS_LD;
5532 goto dogottls;
5533
5534 case R_PPC64_GOT_TLSGD16:
5535 case R_PPC64_GOT_TLSGD16_LO:
5536 case R_PPC64_GOT_TLSGD16_HI:
5537 case R_PPC64_GOT_TLSGD16_HA:
5538 tls_type = TLS_TLS | TLS_GD;
5539 goto dogottls;
5540
5541 case R_PPC64_GOT_TPREL16_DS:
5542 case R_PPC64_GOT_TPREL16_LO_DS:
5543 case R_PPC64_GOT_TPREL16_HI:
5544 case R_PPC64_GOT_TPREL16_HA:
5545 if (bfd_link_dll (info))
5546 info->flags |= DF_STATIC_TLS;
5547 tls_type = TLS_TLS | TLS_TPREL;
5548 goto dogottls;
5549
5550 case R_PPC64_GOT_DTPREL16_DS:
5551 case R_PPC64_GOT_DTPREL16_LO_DS:
5552 case R_PPC64_GOT_DTPREL16_HI:
5553 case R_PPC64_GOT_DTPREL16_HA:
5554 tls_type = TLS_TLS | TLS_DTPREL;
5555 dogottls:
5556 sec->has_tls_reloc = 1;
5557 /* Fall through */
5558
5559 case R_PPC64_GOT16:
5560 case R_PPC64_GOT16_DS:
5561 case R_PPC64_GOT16_HA:
5562 case R_PPC64_GOT16_HI:
5563 case R_PPC64_GOT16_LO:
5564 case R_PPC64_GOT16_LO_DS:
5565 /* This symbol requires a global offset table entry. */
5566 sec->has_toc_reloc = 1;
5567 if (r_type == R_PPC64_GOT_TLSLD16
5568 || r_type == R_PPC64_GOT_TLSGD16
5569 || r_type == R_PPC64_GOT_TPREL16_DS
5570 || r_type == R_PPC64_GOT_DTPREL16_DS
5571 || r_type == R_PPC64_GOT16
5572 || r_type == R_PPC64_GOT16_DS)
5573 {
5574 htab->do_multi_toc = 1;
5575 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5576 }
5577
5578 if (ppc64_elf_tdata (abfd)->got == NULL
5579 && !create_got_section (abfd, info))
5580 return FALSE;
5581
5582 if (h != NULL)
5583 {
5584 struct ppc_link_hash_entry *eh;
5585 struct got_entry *ent;
5586
5587 eh = (struct ppc_link_hash_entry *) h;
5588 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
5589 if (ent->addend == rel->r_addend
5590 && ent->owner == abfd
5591 && ent->tls_type == tls_type)
5592 break;
5593 if (ent == NULL)
5594 {
5595 bfd_size_type amt = sizeof (*ent);
5596 ent = bfd_alloc (abfd, amt);
5597 if (ent == NULL)
5598 return FALSE;
5599 ent->next = eh->elf.got.glist;
5600 ent->addend = rel->r_addend;
5601 ent->owner = abfd;
5602 ent->tls_type = tls_type;
5603 ent->is_indirect = FALSE;
5604 ent->got.refcount = 0;
5605 eh->elf.got.glist = ent;
5606 }
5607 ent->got.refcount += 1;
5608 eh->tls_mask |= tls_type;
5609 }
5610 else
5611 /* This is a global offset table entry for a local symbol. */
5612 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5613 rel->r_addend, tls_type))
5614 return FALSE;
5615
5616 /* We may also need a plt entry if the symbol turns out to be
5617 an ifunc. */
5618 if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1)
5619 {
5620 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5621 return FALSE;
5622 }
5623 break;
5624
5625 case R_PPC64_PLT16_HA:
5626 case R_PPC64_PLT16_HI:
5627 case R_PPC64_PLT16_LO:
5628 case R_PPC64_PLT32:
5629 case R_PPC64_PLT64:
5630 /* This symbol requires a procedure linkage table entry. */
5631 plt_list = ifunc;
5632 if (h != NULL)
5633 {
5634 h->needs_plt = 1;
5635 if (h->root.root.string[0] == '.'
5636 && h->root.root.string[1] != '\0')
5637 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5638 plt_list = &h->plt.plist;
5639 }
5640 if (plt_list == NULL)
5641 {
5642 /* It does not make sense to have a procedure linkage
5643 table entry for a non-ifunc local symbol. */
5644 info->callbacks->einfo
5645 /* xgettext:c-format */
5646 (_("%H: %s reloc against local symbol\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 if (!update_plt_info (abfd, plt_list, rel->r_addend))
5653 return FALSE;
5654 break;
5655
5656 /* The following relocations don't need to propagate the
5657 relocation if linking a shared object since they are
5658 section relative. */
5659 case R_PPC64_SECTOFF:
5660 case R_PPC64_SECTOFF_LO:
5661 case R_PPC64_SECTOFF_HI:
5662 case R_PPC64_SECTOFF_HA:
5663 case R_PPC64_SECTOFF_DS:
5664 case R_PPC64_SECTOFF_LO_DS:
5665 case R_PPC64_DTPREL16:
5666 case R_PPC64_DTPREL16_LO:
5667 case R_PPC64_DTPREL16_HI:
5668 case R_PPC64_DTPREL16_HA:
5669 case R_PPC64_DTPREL16_DS:
5670 case R_PPC64_DTPREL16_LO_DS:
5671 case R_PPC64_DTPREL16_HIGH:
5672 case R_PPC64_DTPREL16_HIGHA:
5673 case R_PPC64_DTPREL16_HIGHER:
5674 case R_PPC64_DTPREL16_HIGHERA:
5675 case R_PPC64_DTPREL16_HIGHEST:
5676 case R_PPC64_DTPREL16_HIGHESTA:
5677 break;
5678
5679 /* Nor do these. */
5680 case R_PPC64_REL16:
5681 case R_PPC64_REL16_LO:
5682 case R_PPC64_REL16_HI:
5683 case R_PPC64_REL16_HA:
5684 case R_PPC64_REL16DX_HA:
5685 break;
5686
5687 /* Not supported as a dynamic relocation. */
5688 case R_PPC64_ADDR64_LOCAL:
5689 if (bfd_link_pic (info))
5690 {
5691 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
5692 ppc_howto_init ();
5693 /* xgettext:c-format */
5694 info->callbacks->einfo (_("%H: %s reloc unsupported "
5695 "in shared libraries and PIEs.\n"),
5696 abfd, sec, rel->r_offset,
5697 ppc64_elf_howto_table[r_type]->name);
5698 bfd_set_error (bfd_error_bad_value);
5699 return FALSE;
5700 }
5701 break;
5702
5703 case R_PPC64_TOC16:
5704 case R_PPC64_TOC16_DS:
5705 htab->do_multi_toc = 1;
5706 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5707 /* Fall through. */
5708 case R_PPC64_TOC16_LO:
5709 case R_PPC64_TOC16_HI:
5710 case R_PPC64_TOC16_HA:
5711 case R_PPC64_TOC16_LO_DS:
5712 sec->has_toc_reloc = 1;
5713 break;
5714
5715 /* Marker reloc. */
5716 case R_PPC64_ENTRY:
5717 break;
5718
5719 /* This relocation describes the C++ object vtable hierarchy.
5720 Reconstruct it for later use during GC. */
5721 case R_PPC64_GNU_VTINHERIT:
5722 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
5723 return FALSE;
5724 break;
5725
5726 /* This relocation describes which C++ vtable entries are actually
5727 used. Record for later use during GC. */
5728 case R_PPC64_GNU_VTENTRY:
5729 BFD_ASSERT (h != NULL);
5730 if (h != NULL
5731 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
5732 return FALSE;
5733 break;
5734
5735 case R_PPC64_REL14:
5736 case R_PPC64_REL14_BRTAKEN:
5737 case R_PPC64_REL14_BRNTAKEN:
5738 {
5739 asection *dest = NULL;
5740
5741 /* Heuristic: If jumping outside our section, chances are
5742 we are going to need a stub. */
5743 if (h != NULL)
5744 {
5745 /* If the sym is weak it may be overridden later, so
5746 don't assume we know where a weak sym lives. */
5747 if (h->root.type == bfd_link_hash_defined)
5748 dest = h->root.u.def.section;
5749 }
5750 else
5751 {
5752 Elf_Internal_Sym *isym;
5753
5754 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5755 abfd, r_symndx);
5756 if (isym == NULL)
5757 return FALSE;
5758
5759 dest = bfd_section_from_elf_index (abfd, isym->st_shndx);
5760 }
5761
5762 if (dest != sec)
5763 ppc64_elf_section_data (sec)->has_14bit_branch = 1;
5764 }
5765 /* Fall through. */
5766
5767 case R_PPC64_REL24:
5768 plt_list = ifunc;
5769 if (h != NULL)
5770 {
5771 h->needs_plt = 1;
5772 if (h->root.root.string[0] == '.'
5773 && h->root.root.string[1] != '\0')
5774 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5775
5776 if (h == tga || h == dottga)
5777 {
5778 sec->has_tls_reloc = 1;
5779 if (rel != relocs
5780 && (ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSGD
5781 || ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSLD))
5782 /* We have a new-style __tls_get_addr call with
5783 a marker reloc. */
5784 ;
5785 else
5786 /* Mark this section as having an old-style call. */
5787 sec->has_tls_get_addr_call = 1;
5788 }
5789 plt_list = &h->plt.plist;
5790 }
5791
5792 /* We may need a .plt entry if the function this reloc
5793 refers to is in a shared lib. */
5794 if (plt_list
5795 && !update_plt_info (abfd, plt_list, rel->r_addend))
5796 return FALSE;
5797 break;
5798
5799 case R_PPC64_ADDR14:
5800 case R_PPC64_ADDR14_BRNTAKEN:
5801 case R_PPC64_ADDR14_BRTAKEN:
5802 case R_PPC64_ADDR24:
5803 goto dodyn;
5804
5805 case R_PPC64_TPREL64:
5806 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
5807 if (bfd_link_dll (info))
5808 info->flags |= DF_STATIC_TLS;
5809 goto dotlstoc;
5810
5811 case R_PPC64_DTPMOD64:
5812 if (rel + 1 < rel_end
5813 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
5814 && rel[1].r_offset == rel->r_offset + 8)
5815 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
5816 else
5817 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
5818 goto dotlstoc;
5819
5820 case R_PPC64_DTPREL64:
5821 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
5822 if (rel != relocs
5823 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
5824 && rel[-1].r_offset == rel->r_offset - 8)
5825 /* This is the second reloc of a dtpmod, dtprel pair.
5826 Don't mark with TLS_DTPREL. */
5827 goto dodyn;
5828
5829 dotlstoc:
5830 sec->has_tls_reloc = 1;
5831 if (h != NULL)
5832 {
5833 struct ppc_link_hash_entry *eh;
5834 eh = (struct ppc_link_hash_entry *) h;
5835 eh->tls_mask |= tls_type;
5836 }
5837 else
5838 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5839 rel->r_addend, tls_type))
5840 return FALSE;
5841
5842 ppc64_sec = ppc64_elf_section_data (sec);
5843 if (ppc64_sec->sec_type != sec_toc)
5844 {
5845 bfd_size_type amt;
5846
5847 /* One extra to simplify get_tls_mask. */
5848 amt = sec->size * sizeof (unsigned) / 8 + sizeof (unsigned);
5849 ppc64_sec->u.toc.symndx = bfd_zalloc (abfd, amt);
5850 if (ppc64_sec->u.toc.symndx == NULL)
5851 return FALSE;
5852 amt = sec->size * sizeof (bfd_vma) / 8;
5853 ppc64_sec->u.toc.add = bfd_zalloc (abfd, amt);
5854 if (ppc64_sec->u.toc.add == NULL)
5855 return FALSE;
5856 BFD_ASSERT (ppc64_sec->sec_type == sec_normal);
5857 ppc64_sec->sec_type = sec_toc;
5858 }
5859 BFD_ASSERT (rel->r_offset % 8 == 0);
5860 ppc64_sec->u.toc.symndx[rel->r_offset / 8] = r_symndx;
5861 ppc64_sec->u.toc.add[rel->r_offset / 8] = rel->r_addend;
5862
5863 /* Mark the second slot of a GD or LD entry.
5864 -1 to indicate GD and -2 to indicate LD. */
5865 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
5866 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -1;
5867 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
5868 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -2;
5869 goto dodyn;
5870
5871 case R_PPC64_TPREL16:
5872 case R_PPC64_TPREL16_LO:
5873 case R_PPC64_TPREL16_HI:
5874 case R_PPC64_TPREL16_HA:
5875 case R_PPC64_TPREL16_DS:
5876 case R_PPC64_TPREL16_LO_DS:
5877 case R_PPC64_TPREL16_HIGH:
5878 case R_PPC64_TPREL16_HIGHA:
5879 case R_PPC64_TPREL16_HIGHER:
5880 case R_PPC64_TPREL16_HIGHERA:
5881 case R_PPC64_TPREL16_HIGHEST:
5882 case R_PPC64_TPREL16_HIGHESTA:
5883 if (bfd_link_dll (info))
5884 info->flags |= DF_STATIC_TLS;
5885 goto dodyn;
5886
5887 case R_PPC64_ADDR64:
5888 if (is_opd
5889 && rel + 1 < rel_end
5890 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
5891 {
5892 if (h != NULL)
5893 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5894 }
5895 /* Fall through. */
5896
5897 case R_PPC64_ADDR16:
5898 case R_PPC64_ADDR16_DS:
5899 case R_PPC64_ADDR16_HA:
5900 case R_PPC64_ADDR16_HI:
5901 case R_PPC64_ADDR16_HIGH:
5902 case R_PPC64_ADDR16_HIGHA:
5903 case R_PPC64_ADDR16_HIGHER:
5904 case R_PPC64_ADDR16_HIGHERA:
5905 case R_PPC64_ADDR16_HIGHEST:
5906 case R_PPC64_ADDR16_HIGHESTA:
5907 case R_PPC64_ADDR16_LO:
5908 case R_PPC64_ADDR16_LO_DS:
5909 if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1
5910 && rel->r_addend == 0)
5911 {
5912 /* We may need a .plt entry if this reloc refers to a
5913 function in a shared lib. */
5914 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5915 return FALSE;
5916 h->pointer_equality_needed = 1;
5917 }
5918 /* Fall through. */
5919
5920 case R_PPC64_REL30:
5921 case R_PPC64_REL32:
5922 case R_PPC64_REL64:
5923 case R_PPC64_ADDR32:
5924 case R_PPC64_UADDR16:
5925 case R_PPC64_UADDR32:
5926 case R_PPC64_UADDR64:
5927 case R_PPC64_TOC:
5928 if (h != NULL && !bfd_link_pic (info))
5929 /* We may need a copy reloc. */
5930 h->non_got_ref = 1;
5931
5932 /* Don't propagate .opd relocs. */
5933 if (NO_OPD_RELOCS && is_opd)
5934 break;
5935
5936 /* If we are creating a shared library, and this is a reloc
5937 against a global symbol, or a non PC relative reloc
5938 against a local symbol, then we need to copy the reloc
5939 into the shared library. However, if we are linking with
5940 -Bsymbolic, we do not need to copy a reloc against a
5941 global symbol which is defined in an object we are
5942 including in the link (i.e., DEF_REGULAR is set). At
5943 this point we have not seen all the input files, so it is
5944 possible that DEF_REGULAR is not set now but will be set
5945 later (it is never cleared). In case of a weak definition,
5946 DEF_REGULAR may be cleared later by a strong definition in
5947 a shared library. We account for that possibility below by
5948 storing information in the dyn_relocs field of the hash
5949 table entry. A similar situation occurs when creating
5950 shared libraries and symbol visibility changes render the
5951 symbol local.
5952
5953 If on the other hand, we are creating an executable, we
5954 may need to keep relocations for symbols satisfied by a
5955 dynamic library if we manage to avoid copy relocs for the
5956 symbol. */
5957 dodyn:
5958 if ((bfd_link_pic (info)
5959 && (must_be_dyn_reloc (info, r_type)
5960 || (h != NULL
5961 && (!SYMBOLIC_BIND (info, h)
5962 || h->root.type == bfd_link_hash_defweak
5963 || !h->def_regular))))
5964 || (ELIMINATE_COPY_RELOCS
5965 && !bfd_link_pic (info)
5966 && h != NULL
5967 && (h->root.type == bfd_link_hash_defweak
5968 || !h->def_regular))
5969 || (!bfd_link_pic (info)
5970 && ifunc != NULL))
5971 {
5972 /* We must copy these reloc types into the output file.
5973 Create a reloc section in dynobj and make room for
5974 this reloc. */
5975 if (sreloc == NULL)
5976 {
5977 sreloc = _bfd_elf_make_dynamic_reloc_section
5978 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
5979
5980 if (sreloc == NULL)
5981 return FALSE;
5982 }
5983
5984 /* If this is a global symbol, we count the number of
5985 relocations we need for this symbol. */
5986 if (h != NULL)
5987 {
5988 struct elf_dyn_relocs *p;
5989 struct elf_dyn_relocs **head;
5990
5991 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
5992 p = *head;
5993 if (p == NULL || p->sec != sec)
5994 {
5995 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5996 if (p == NULL)
5997 return FALSE;
5998 p->next = *head;
5999 *head = p;
6000 p->sec = sec;
6001 p->count = 0;
6002 p->pc_count = 0;
6003 }
6004 p->count += 1;
6005 if (!must_be_dyn_reloc (info, r_type))
6006 p->pc_count += 1;
6007 }
6008 else
6009 {
6010 /* Track dynamic relocs needed for local syms too.
6011 We really need local syms available to do this
6012 easily. Oh well. */
6013 struct ppc_dyn_relocs *p;
6014 struct ppc_dyn_relocs **head;
6015 bfd_boolean is_ifunc;
6016 asection *s;
6017 void *vpp;
6018 Elf_Internal_Sym *isym;
6019
6020 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
6021 abfd, r_symndx);
6022 if (isym == NULL)
6023 return FALSE;
6024
6025 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
6026 if (s == NULL)
6027 s = sec;
6028
6029 vpp = &elf_section_data (s)->local_dynrel;
6030 head = (struct ppc_dyn_relocs **) vpp;
6031 is_ifunc = ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC;
6032 p = *head;
6033 if (p != NULL && p->sec == sec && p->ifunc != is_ifunc)
6034 p = p->next;
6035 if (p == NULL || p->sec != sec || p->ifunc != is_ifunc)
6036 {
6037 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
6038 if (p == NULL)
6039 return FALSE;
6040 p->next = *head;
6041 *head = p;
6042 p->sec = sec;
6043 p->ifunc = is_ifunc;
6044 p->count = 0;
6045 }
6046 p->count += 1;
6047 }
6048 }
6049 break;
6050
6051 default:
6052 break;
6053 }
6054 }
6055
6056 return TRUE;
6057 }
6058
6059 /* Merge backend specific data from an object file to the output
6060 object file when linking. */
6061
6062 static bfd_boolean
6063 ppc64_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
6064 {
6065 bfd *obfd = info->output_bfd;
6066 unsigned long iflags, oflags;
6067
6068 if ((ibfd->flags & BFD_LINKER_CREATED) != 0)
6069 return TRUE;
6070
6071 if (!is_ppc64_elf (ibfd) || !is_ppc64_elf (obfd))
6072 return TRUE;
6073
6074 if (!_bfd_generic_verify_endian_match (ibfd, info))
6075 return FALSE;
6076
6077 iflags = elf_elfheader (ibfd)->e_flags;
6078 oflags = elf_elfheader (obfd)->e_flags;
6079
6080 if (iflags & ~EF_PPC64_ABI)
6081 {
6082 _bfd_error_handler
6083 /* xgettext:c-format */
6084 (_("%B uses unknown e_flags 0x%lx"), ibfd, iflags);
6085 bfd_set_error (bfd_error_bad_value);
6086 return FALSE;
6087 }
6088 else if (iflags != oflags && iflags != 0)
6089 {
6090 _bfd_error_handler
6091 /* xgettext:c-format */
6092 (_("%B: ABI version %ld is not compatible with ABI version %ld output"),
6093 ibfd, iflags, oflags);
6094 bfd_set_error (bfd_error_bad_value);
6095 return FALSE;
6096 }
6097
6098 _bfd_elf_ppc_merge_fp_attributes (ibfd, info);
6099
6100 /* Merge Tag_compatibility attributes and any common GNU ones. */
6101 _bfd_elf_merge_object_attributes (ibfd, info);
6102
6103 return TRUE;
6104 }
6105
6106 static bfd_boolean
6107 ppc64_elf_print_private_bfd_data (bfd *abfd, void *ptr)
6108 {
6109 /* Print normal ELF private data. */
6110 _bfd_elf_print_private_bfd_data (abfd, ptr);
6111
6112 if (elf_elfheader (abfd)->e_flags != 0)
6113 {
6114 FILE *file = ptr;
6115
6116 fprintf (file, _("private flags = 0x%lx:"),
6117 elf_elfheader (abfd)->e_flags);
6118
6119 if ((elf_elfheader (abfd)->e_flags & EF_PPC64_ABI) != 0)
6120 fprintf (file, _(" [abiv%ld]"),
6121 elf_elfheader (abfd)->e_flags & EF_PPC64_ABI);
6122 fputc ('\n', file);
6123 }
6124
6125 return TRUE;
6126 }
6127
6128 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
6129 of the code entry point, and its section, which must be in the same
6130 object as OPD_SEC. Returns (bfd_vma) -1 on error. */
6131
6132 static bfd_vma
6133 opd_entry_value (asection *opd_sec,
6134 bfd_vma offset,
6135 asection **code_sec,
6136 bfd_vma *code_off,
6137 bfd_boolean in_code_sec)
6138 {
6139 bfd *opd_bfd = opd_sec->owner;
6140 Elf_Internal_Rela *relocs;
6141 Elf_Internal_Rela *lo, *hi, *look;
6142 bfd_vma val;
6143
6144 /* No relocs implies we are linking a --just-symbols object, or looking
6145 at a final linked executable with addr2line or somesuch. */
6146 if (opd_sec->reloc_count == 0)
6147 {
6148 bfd_byte *contents = ppc64_elf_tdata (opd_bfd)->opd.contents;
6149
6150 if (contents == NULL)
6151 {
6152 if (!bfd_malloc_and_get_section (opd_bfd, opd_sec, &contents))
6153 return (bfd_vma) -1;
6154 ppc64_elf_tdata (opd_bfd)->opd.contents = contents;
6155 }
6156
6157 /* PR 17512: file: 64b9dfbb. */
6158 if (offset + 7 >= opd_sec->size || offset + 7 < offset)
6159 return (bfd_vma) -1;
6160
6161 val = bfd_get_64 (opd_bfd, contents + offset);
6162 if (code_sec != NULL)
6163 {
6164 asection *sec, *likely = NULL;
6165
6166 if (in_code_sec)
6167 {
6168 sec = *code_sec;
6169 if (sec->vma <= val
6170 && val < sec->vma + sec->size)
6171 likely = sec;
6172 else
6173 val = -1;
6174 }
6175 else
6176 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
6177 if (sec->vma <= val
6178 && (sec->flags & SEC_LOAD) != 0
6179 && (sec->flags & SEC_ALLOC) != 0)
6180 likely = sec;
6181 if (likely != NULL)
6182 {
6183 *code_sec = likely;
6184 if (code_off != NULL)
6185 *code_off = val - likely->vma;
6186 }
6187 }
6188 return val;
6189 }
6190
6191 BFD_ASSERT (is_ppc64_elf (opd_bfd));
6192
6193 relocs = ppc64_elf_tdata (opd_bfd)->opd.relocs;
6194 if (relocs == NULL)
6195 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
6196 /* PR 17512: file: df8e1fd6. */
6197 if (relocs == NULL)
6198 return (bfd_vma) -1;
6199
6200 /* Go find the opd reloc at the sym address. */
6201 lo = relocs;
6202 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
6203 val = (bfd_vma) -1;
6204 while (lo < hi)
6205 {
6206 look = lo + (hi - lo) / 2;
6207 if (look->r_offset < offset)
6208 lo = look + 1;
6209 else if (look->r_offset > offset)
6210 hi = look;
6211 else
6212 {
6213 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (opd_bfd);
6214
6215 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
6216 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
6217 {
6218 unsigned long symndx = ELF64_R_SYM (look->r_info);
6219 asection *sec = NULL;
6220
6221 if (symndx >= symtab_hdr->sh_info
6222 && elf_sym_hashes (opd_bfd) != NULL)
6223 {
6224 struct elf_link_hash_entry **sym_hashes;
6225 struct elf_link_hash_entry *rh;
6226
6227 sym_hashes = elf_sym_hashes (opd_bfd);
6228 rh = sym_hashes[symndx - symtab_hdr->sh_info];
6229 if (rh != NULL)
6230 {
6231 rh = elf_follow_link (rh);
6232 if (rh->root.type != bfd_link_hash_defined
6233 && rh->root.type != bfd_link_hash_defweak)
6234 break;
6235 if (rh->root.u.def.section->owner == opd_bfd)
6236 {
6237 val = rh->root.u.def.value;
6238 sec = rh->root.u.def.section;
6239 }
6240 }
6241 }
6242
6243 if (sec == NULL)
6244 {
6245 Elf_Internal_Sym *sym;
6246
6247 if (symndx < symtab_hdr->sh_info)
6248 {
6249 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
6250 if (sym == NULL)
6251 {
6252 size_t symcnt = symtab_hdr->sh_info;
6253 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
6254 symcnt, 0,
6255 NULL, NULL, NULL);
6256 if (sym == NULL)
6257 break;
6258 symtab_hdr->contents = (bfd_byte *) sym;
6259 }
6260 sym += symndx;
6261 }
6262 else
6263 {
6264 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
6265 1, symndx,
6266 NULL, NULL, NULL);
6267 if (sym == NULL)
6268 break;
6269 }
6270 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
6271 if (sec == NULL)
6272 break;
6273 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
6274 val = sym->st_value;
6275 }
6276
6277 val += look->r_addend;
6278 if (code_off != NULL)
6279 *code_off = val;
6280 if (code_sec != NULL)
6281 {
6282 if (in_code_sec && *code_sec != sec)
6283 return -1;
6284 else
6285 *code_sec = sec;
6286 }
6287 if (sec->output_section != NULL)
6288 val += sec->output_section->vma + sec->output_offset;
6289 }
6290 break;
6291 }
6292 }
6293
6294 return val;
6295 }
6296
6297 /* If the ELF symbol SYM might be a function in SEC, return the
6298 function size and set *CODE_OFF to the function's entry point,
6299 otherwise return zero. */
6300
6301 static bfd_size_type
6302 ppc64_elf_maybe_function_sym (const asymbol *sym, asection *sec,
6303 bfd_vma *code_off)
6304 {
6305 bfd_size_type size;
6306
6307 if ((sym->flags & (BSF_SECTION_SYM | BSF_FILE | BSF_OBJECT
6308 | BSF_THREAD_LOCAL | BSF_RELC | BSF_SRELC)) != 0)
6309 return 0;
6310
6311 size = 0;
6312 if (!(sym->flags & BSF_SYNTHETIC))
6313 size = ((elf_symbol_type *) sym)->internal_elf_sym.st_size;
6314
6315 if (strcmp (sym->section->name, ".opd") == 0)
6316 {
6317 struct _opd_sec_data *opd = get_opd_info (sym->section);
6318 bfd_vma symval = sym->value;
6319
6320 if (opd != NULL
6321 && opd->adjust != NULL
6322 && elf_section_data (sym->section)->relocs != NULL)
6323 {
6324 /* opd_entry_value will use cached relocs that have been
6325 adjusted, but with raw symbols. That means both local
6326 and global symbols need adjusting. */
6327 long adjust = opd->adjust[OPD_NDX (symval)];
6328 if (adjust == -1)
6329 return 0;
6330 symval += adjust;
6331 }
6332
6333 if (opd_entry_value (sym->section, symval,
6334 &sec, code_off, TRUE) == (bfd_vma) -1)
6335 return 0;
6336 /* An old ABI binary with dot-syms has a size of 24 on the .opd
6337 symbol. This size has nothing to do with the code size of the
6338 function, which is what we're supposed to return, but the
6339 code size isn't available without looking up the dot-sym.
6340 However, doing that would be a waste of time particularly
6341 since elf_find_function will look at the dot-sym anyway.
6342 Now, elf_find_function will keep the largest size of any
6343 function sym found at the code address of interest, so return
6344 1 here to avoid it incorrectly caching a larger function size
6345 for a small function. This does mean we return the wrong
6346 size for a new-ABI function of size 24, but all that does is
6347 disable caching for such functions. */
6348 if (size == 24)
6349 size = 1;
6350 }
6351 else
6352 {
6353 if (sym->section != sec)
6354 return 0;
6355 *code_off = sym->value;
6356 }
6357 if (size == 0)
6358 size = 1;
6359 return size;
6360 }
6361
6362 /* Return true if symbol is a strong function defined in an ELFv2
6363 object with st_other localentry bits of zero, ie. its local entry
6364 point coincides with its global entry point. */
6365
6366 static bfd_boolean
6367 is_elfv2_localentry0 (struct elf_link_hash_entry *h)
6368 {
6369 return (h != NULL
6370 && h->type == STT_FUNC
6371 && h->root.type == bfd_link_hash_defined
6372 && (STO_PPC64_LOCAL_MASK & h->other) == 0
6373 && !((struct ppc_link_hash_entry *) h)->non_zero_localentry
6374 && is_ppc64_elf (h->root.u.def.section->owner)
6375 && abiversion (h->root.u.def.section->owner) >= 2);
6376 }
6377
6378 /* Return true if symbol is defined in a regular object file. */
6379
6380 static bfd_boolean
6381 is_static_defined (struct elf_link_hash_entry *h)
6382 {
6383 return ((h->root.type == bfd_link_hash_defined
6384 || h->root.type == bfd_link_hash_defweak)
6385 && h->root.u.def.section != NULL
6386 && h->root.u.def.section->output_section != NULL);
6387 }
6388
6389 /* If FDH is a function descriptor symbol, return the associated code
6390 entry symbol if it is defined. Return NULL otherwise. */
6391
6392 static struct ppc_link_hash_entry *
6393 defined_code_entry (struct ppc_link_hash_entry *fdh)
6394 {
6395 if (fdh->is_func_descriptor)
6396 {
6397 struct ppc_link_hash_entry *fh = ppc_follow_link (fdh->oh);
6398 if (fh->elf.root.type == bfd_link_hash_defined
6399 || fh->elf.root.type == bfd_link_hash_defweak)
6400 return fh;
6401 }
6402 return NULL;
6403 }
6404
6405 /* If FH is a function code entry symbol, return the associated
6406 function descriptor symbol if it is defined. Return NULL otherwise. */
6407
6408 static struct ppc_link_hash_entry *
6409 defined_func_desc (struct ppc_link_hash_entry *fh)
6410 {
6411 if (fh->oh != NULL
6412 && fh->oh->is_func_descriptor)
6413 {
6414 struct ppc_link_hash_entry *fdh = ppc_follow_link (fh->oh);
6415 if (fdh->elf.root.type == bfd_link_hash_defined
6416 || fdh->elf.root.type == bfd_link_hash_defweak)
6417 return fdh;
6418 }
6419 return NULL;
6420 }
6421
6422 static bfd_boolean func_desc_adjust (struct elf_link_hash_entry *, void *);
6423
6424 /* Garbage collect sections, after first dealing with dot-symbols. */
6425
6426 static bfd_boolean
6427 ppc64_elf_gc_sections (bfd *abfd, struct bfd_link_info *info)
6428 {
6429 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6430
6431 if (htab != NULL && htab->need_func_desc_adj)
6432 {
6433 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
6434 htab->need_func_desc_adj = 0;
6435 }
6436 return bfd_elf_gc_sections (abfd, info);
6437 }
6438
6439 /* Mark all our entry sym sections, both opd and code section. */
6440
6441 static void
6442 ppc64_elf_gc_keep (struct bfd_link_info *info)
6443 {
6444 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6445 struct bfd_sym_chain *sym;
6446
6447 if (htab == NULL)
6448 return;
6449
6450 for (sym = info->gc_sym_list; sym != NULL; sym = sym->next)
6451 {
6452 struct ppc_link_hash_entry *eh, *fh;
6453 asection *sec;
6454
6455 eh = (struct ppc_link_hash_entry *)
6456 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, TRUE);
6457 if (eh == NULL)
6458 continue;
6459 if (eh->elf.root.type != bfd_link_hash_defined
6460 && eh->elf.root.type != bfd_link_hash_defweak)
6461 continue;
6462
6463 fh = defined_code_entry (eh);
6464 if (fh != NULL)
6465 {
6466 sec = fh->elf.root.u.def.section;
6467 sec->flags |= SEC_KEEP;
6468 }
6469 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6470 && opd_entry_value (eh->elf.root.u.def.section,
6471 eh->elf.root.u.def.value,
6472 &sec, NULL, FALSE) != (bfd_vma) -1)
6473 sec->flags |= SEC_KEEP;
6474
6475 sec = eh->elf.root.u.def.section;
6476 sec->flags |= SEC_KEEP;
6477 }
6478 }
6479
6480 /* Mark sections containing dynamically referenced symbols. When
6481 building shared libraries, we must assume that any visible symbol is
6482 referenced. */
6483
6484 static bfd_boolean
6485 ppc64_elf_gc_mark_dynamic_ref (struct elf_link_hash_entry *h, void *inf)
6486 {
6487 struct bfd_link_info *info = (struct bfd_link_info *) inf;
6488 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
6489 struct ppc_link_hash_entry *fdh;
6490 struct bfd_elf_dynamic_list *d = info->dynamic_list;
6491
6492 /* Dynamic linking info is on the func descriptor sym. */
6493 fdh = defined_func_desc (eh);
6494 if (fdh != NULL)
6495 eh = fdh;
6496
6497 if ((eh->elf.root.type == bfd_link_hash_defined
6498 || eh->elf.root.type == bfd_link_hash_defweak)
6499 && (eh->elf.ref_dynamic
6500 || ((eh->elf.def_regular || ELF_COMMON_DEF_P (&eh->elf))
6501 && ELF_ST_VISIBILITY (eh->elf.other) != STV_INTERNAL
6502 && ELF_ST_VISIBILITY (eh->elf.other) != STV_HIDDEN
6503 && (!bfd_link_executable (info)
6504 || info->gc_keep_exported
6505 || info->export_dynamic
6506 || (eh->elf.dynamic
6507 && d != NULL
6508 && (*d->match) (&d->head, NULL, eh->elf.root.root.string)))
6509 && (eh->elf.versioned >= versioned
6510 || !bfd_hide_sym_by_version (info->version_info,
6511 eh->elf.root.root.string)))))
6512 {
6513 asection *code_sec;
6514 struct ppc_link_hash_entry *fh;
6515
6516 eh->elf.root.u.def.section->flags |= SEC_KEEP;
6517
6518 /* Function descriptor syms cause the associated
6519 function code sym section to be marked. */
6520 fh = defined_code_entry (eh);
6521 if (fh != NULL)
6522 {
6523 code_sec = fh->elf.root.u.def.section;
6524 code_sec->flags |= SEC_KEEP;
6525 }
6526 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6527 && opd_entry_value (eh->elf.root.u.def.section,
6528 eh->elf.root.u.def.value,
6529 &code_sec, NULL, FALSE) != (bfd_vma) -1)
6530 code_sec->flags |= SEC_KEEP;
6531 }
6532
6533 return TRUE;
6534 }
6535
6536 /* Return the section that should be marked against GC for a given
6537 relocation. */
6538
6539 static asection *
6540 ppc64_elf_gc_mark_hook (asection *sec,
6541 struct bfd_link_info *info,
6542 Elf_Internal_Rela *rel,
6543 struct elf_link_hash_entry *h,
6544 Elf_Internal_Sym *sym)
6545 {
6546 asection *rsec;
6547
6548 /* Syms return NULL if we're marking .opd, so we avoid marking all
6549 function sections, as all functions are referenced in .opd. */
6550 rsec = NULL;
6551 if (get_opd_info (sec) != NULL)
6552 return rsec;
6553
6554 if (h != NULL)
6555 {
6556 enum elf_ppc64_reloc_type r_type;
6557 struct ppc_link_hash_entry *eh, *fh, *fdh;
6558
6559 r_type = ELF64_R_TYPE (rel->r_info);
6560 switch (r_type)
6561 {
6562 case R_PPC64_GNU_VTINHERIT:
6563 case R_PPC64_GNU_VTENTRY:
6564 break;
6565
6566 default:
6567 switch (h->root.type)
6568 {
6569 case bfd_link_hash_defined:
6570 case bfd_link_hash_defweak:
6571 eh = (struct ppc_link_hash_entry *) h;
6572 fdh = defined_func_desc (eh);
6573 if (fdh != NULL)
6574 {
6575 /* -mcall-aixdesc code references the dot-symbol on
6576 a call reloc. Mark the function descriptor too
6577 against garbage collection. */
6578 fdh->elf.mark = 1;
6579 if (fdh->elf.u.weakdef != NULL)
6580 fdh->elf.u.weakdef->mark = 1;
6581 eh = fdh;
6582 }
6583
6584 /* Function descriptor syms cause the associated
6585 function code sym section to be marked. */
6586 fh = defined_code_entry (eh);
6587 if (fh != NULL)
6588 {
6589 /* They also mark their opd section. */
6590 eh->elf.root.u.def.section->gc_mark = 1;
6591
6592 rsec = fh->elf.root.u.def.section;
6593 }
6594 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6595 && opd_entry_value (eh->elf.root.u.def.section,
6596 eh->elf.root.u.def.value,
6597 &rsec, NULL, FALSE) != (bfd_vma) -1)
6598 eh->elf.root.u.def.section->gc_mark = 1;
6599 else
6600 rsec = h->root.u.def.section;
6601 break;
6602
6603 case bfd_link_hash_common:
6604 rsec = h->root.u.c.p->section;
6605 break;
6606
6607 default:
6608 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
6609 }
6610 }
6611 }
6612 else
6613 {
6614 struct _opd_sec_data *opd;
6615
6616 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
6617 opd = get_opd_info (rsec);
6618 if (opd != NULL && opd->func_sec != NULL)
6619 {
6620 rsec->gc_mark = 1;
6621
6622 rsec = opd->func_sec[OPD_NDX (sym->st_value + rel->r_addend)];
6623 }
6624 }
6625
6626 return rsec;
6627 }
6628
6629 /* The maximum size of .sfpr. */
6630 #define SFPR_MAX (218*4)
6631
6632 struct sfpr_def_parms
6633 {
6634 const char name[12];
6635 unsigned char lo, hi;
6636 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
6637 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
6638 };
6639
6640 /* Auto-generate _save*, _rest* functions in .sfpr.
6641 If STUB_SEC is non-null, define alias symbols in STUB_SEC
6642 instead. */
6643
6644 static bfd_boolean
6645 sfpr_define (struct bfd_link_info *info,
6646 const struct sfpr_def_parms *parm,
6647 asection *stub_sec)
6648 {
6649 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6650 unsigned int i;
6651 size_t len = strlen (parm->name);
6652 bfd_boolean writing = FALSE;
6653 char sym[16];
6654
6655 if (htab == NULL)
6656 return FALSE;
6657
6658 memcpy (sym, parm->name, len);
6659 sym[len + 2] = 0;
6660
6661 for (i = parm->lo; i <= parm->hi; i++)
6662 {
6663 struct ppc_link_hash_entry *h;
6664
6665 sym[len + 0] = i / 10 + '0';
6666 sym[len + 1] = i % 10 + '0';
6667 h = (struct ppc_link_hash_entry *)
6668 elf_link_hash_lookup (&htab->elf, sym, writing, TRUE, TRUE);
6669 if (stub_sec != NULL)
6670 {
6671 if (h != NULL
6672 && h->elf.root.type == bfd_link_hash_defined
6673 && h->elf.root.u.def.section == htab->sfpr)
6674 {
6675 struct elf_link_hash_entry *s;
6676 char buf[32];
6677 sprintf (buf, "%08x.%s", stub_sec->id & 0xffffffff, sym);
6678 s = elf_link_hash_lookup (&htab->elf, buf, TRUE, TRUE, FALSE);
6679 if (s == NULL)
6680 return FALSE;
6681 if (s->root.type == bfd_link_hash_new
6682 || (s->root.type = bfd_link_hash_defined
6683 && s->root.u.def.section == stub_sec))
6684 {
6685 s->root.type = bfd_link_hash_defined;
6686 s->root.u.def.section = stub_sec;
6687 s->root.u.def.value = (stub_sec->size
6688 + h->elf.root.u.def.value);
6689 s->ref_regular = 1;
6690 s->def_regular = 1;
6691 s->ref_regular_nonweak = 1;
6692 s->forced_local = 1;
6693 s->non_elf = 0;
6694 s->root.linker_def = 1;
6695 }
6696 }
6697 continue;
6698 }
6699 if (h != NULL)
6700 {
6701 h->save_res = 1;
6702 if (!h->elf.def_regular)
6703 {
6704 h->elf.root.type = bfd_link_hash_defined;
6705 h->elf.root.u.def.section = htab->sfpr;
6706 h->elf.root.u.def.value = htab->sfpr->size;
6707 h->elf.type = STT_FUNC;
6708 h->elf.def_regular = 1;
6709 h->elf.non_elf = 0;
6710 _bfd_elf_link_hash_hide_symbol (info, &h->elf, TRUE);
6711 writing = TRUE;
6712 if (htab->sfpr->contents == NULL)
6713 {
6714 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
6715 if (htab->sfpr->contents == NULL)
6716 return FALSE;
6717 }
6718 }
6719 }
6720 if (writing)
6721 {
6722 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
6723 if (i != parm->hi)
6724 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
6725 else
6726 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
6727 htab->sfpr->size = p - htab->sfpr->contents;
6728 }
6729 }
6730
6731 return TRUE;
6732 }
6733
6734 static bfd_byte *
6735 savegpr0 (bfd *abfd, bfd_byte *p, int r)
6736 {
6737 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6738 return p + 4;
6739 }
6740
6741 static bfd_byte *
6742 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
6743 {
6744 p = savegpr0 (abfd, p, r);
6745 bfd_put_32 (abfd, STD_R0_0R1 + STK_LR, p);
6746 p = p + 4;
6747 bfd_put_32 (abfd, BLR, p);
6748 return p + 4;
6749 }
6750
6751 static bfd_byte *
6752 restgpr0 (bfd *abfd, bfd_byte *p, int r)
6753 {
6754 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6755 return p + 4;
6756 }
6757
6758 static bfd_byte *
6759 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
6760 {
6761 bfd_put_32 (abfd, LD_R0_0R1 + STK_LR, p);
6762 p = p + 4;
6763 p = restgpr0 (abfd, p, r);
6764 bfd_put_32 (abfd, MTLR_R0, p);
6765 p = p + 4;
6766 if (r == 29)
6767 {
6768 p = restgpr0 (abfd, p, 30);
6769 p = restgpr0 (abfd, p, 31);
6770 }
6771 bfd_put_32 (abfd, BLR, p);
6772 return p + 4;
6773 }
6774
6775 static bfd_byte *
6776 savegpr1 (bfd *abfd, bfd_byte *p, int r)
6777 {
6778 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6779 return p + 4;
6780 }
6781
6782 static bfd_byte *
6783 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
6784 {
6785 p = savegpr1 (abfd, p, r);
6786 bfd_put_32 (abfd, BLR, p);
6787 return p + 4;
6788 }
6789
6790 static bfd_byte *
6791 restgpr1 (bfd *abfd, bfd_byte *p, int r)
6792 {
6793 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6794 return p + 4;
6795 }
6796
6797 static bfd_byte *
6798 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
6799 {
6800 p = restgpr1 (abfd, p, r);
6801 bfd_put_32 (abfd, BLR, p);
6802 return p + 4;
6803 }
6804
6805 static bfd_byte *
6806 savefpr (bfd *abfd, bfd_byte *p, int r)
6807 {
6808 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6809 return p + 4;
6810 }
6811
6812 static bfd_byte *
6813 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
6814 {
6815 p = savefpr (abfd, p, r);
6816 bfd_put_32 (abfd, STD_R0_0R1 + STK_LR, p);
6817 p = p + 4;
6818 bfd_put_32 (abfd, BLR, p);
6819 return p + 4;
6820 }
6821
6822 static bfd_byte *
6823 restfpr (bfd *abfd, bfd_byte *p, int r)
6824 {
6825 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6826 return p + 4;
6827 }
6828
6829 static bfd_byte *
6830 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
6831 {
6832 bfd_put_32 (abfd, LD_R0_0R1 + STK_LR, p);
6833 p = p + 4;
6834 p = restfpr (abfd, p, r);
6835 bfd_put_32 (abfd, MTLR_R0, p);
6836 p = p + 4;
6837 if (r == 29)
6838 {
6839 p = restfpr (abfd, p, 30);
6840 p = restfpr (abfd, p, 31);
6841 }
6842 bfd_put_32 (abfd, BLR, p);
6843 return p + 4;
6844 }
6845
6846 static bfd_byte *
6847 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
6848 {
6849 p = savefpr (abfd, p, r);
6850 bfd_put_32 (abfd, BLR, p);
6851 return p + 4;
6852 }
6853
6854 static bfd_byte *
6855 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
6856 {
6857 p = restfpr (abfd, p, r);
6858 bfd_put_32 (abfd, BLR, p);
6859 return p + 4;
6860 }
6861
6862 static bfd_byte *
6863 savevr (bfd *abfd, bfd_byte *p, int r)
6864 {
6865 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6866 p = p + 4;
6867 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
6868 return p + 4;
6869 }
6870
6871 static bfd_byte *
6872 savevr_tail (bfd *abfd, bfd_byte *p, int r)
6873 {
6874 p = savevr (abfd, p, r);
6875 bfd_put_32 (abfd, BLR, p);
6876 return p + 4;
6877 }
6878
6879 static bfd_byte *
6880 restvr (bfd *abfd, bfd_byte *p, int r)
6881 {
6882 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6883 p = p + 4;
6884 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
6885 return p + 4;
6886 }
6887
6888 static bfd_byte *
6889 restvr_tail (bfd *abfd, bfd_byte *p, int r)
6890 {
6891 p = restvr (abfd, p, r);
6892 bfd_put_32 (abfd, BLR, p);
6893 return p + 4;
6894 }
6895
6896 /* Called via elf_link_hash_traverse to transfer dynamic linking
6897 information on function code symbol entries to their corresponding
6898 function descriptor symbol entries. */
6899
6900 static bfd_boolean
6901 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
6902 {
6903 struct bfd_link_info *info;
6904 struct ppc_link_hash_table *htab;
6905 struct ppc_link_hash_entry *fh;
6906 struct ppc_link_hash_entry *fdh;
6907 bfd_boolean force_local;
6908
6909 fh = (struct ppc_link_hash_entry *) h;
6910 if (fh->elf.root.type == bfd_link_hash_indirect)
6911 return TRUE;
6912
6913 if (!fh->is_func)
6914 return TRUE;
6915
6916 if (fh->elf.root.root.string[0] != '.'
6917 || fh->elf.root.root.string[1] == '\0')
6918 return TRUE;
6919
6920 info = inf;
6921 htab = ppc_hash_table (info);
6922 if (htab == NULL)
6923 return FALSE;
6924
6925 /* Find the corresponding function descriptor symbol. */
6926 fdh = lookup_fdh (fh, htab);
6927
6928 /* Resolve undefined references to dot-symbols as the value
6929 in the function descriptor, if we have one in a regular object.
6930 This is to satisfy cases like ".quad .foo". Calls to functions
6931 in dynamic objects are handled elsewhere. */
6932 if ((fh->elf.root.type == bfd_link_hash_undefined
6933 || fh->elf.root.type == bfd_link_hash_undefweak)
6934 && (fdh->elf.root.type == bfd_link_hash_defined
6935 || fdh->elf.root.type == bfd_link_hash_defweak)
6936 && get_opd_info (fdh->elf.root.u.def.section) != NULL
6937 && opd_entry_value (fdh->elf.root.u.def.section,
6938 fdh->elf.root.u.def.value,
6939 &fh->elf.root.u.def.section,
6940 &fh->elf.root.u.def.value, FALSE) != (bfd_vma) -1)
6941 {
6942 fh->elf.root.type = fdh->elf.root.type;
6943 fh->elf.forced_local = 1;
6944 fh->elf.def_regular = fdh->elf.def_regular;
6945 fh->elf.def_dynamic = fdh->elf.def_dynamic;
6946 }
6947
6948 if (!fh->elf.dynamic)
6949 {
6950 struct plt_entry *ent;
6951
6952 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
6953 if (ent->plt.refcount > 0)
6954 break;
6955 if (ent == NULL)
6956 return TRUE;
6957 }
6958
6959 /* Create a descriptor as undefined if necessary. */
6960 if (fdh == NULL
6961 && !bfd_link_executable (info)
6962 && (fh->elf.root.type == bfd_link_hash_undefined
6963 || fh->elf.root.type == bfd_link_hash_undefweak))
6964 {
6965 fdh = make_fdh (info, fh);
6966 if (fdh == NULL)
6967 return FALSE;
6968 }
6969
6970 /* We can't support overriding of symbols on a fake descriptor. */
6971 if (fdh != NULL
6972 && fdh->fake
6973 && (fh->elf.root.type == bfd_link_hash_defined
6974 || fh->elf.root.type == bfd_link_hash_defweak))
6975 _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE);
6976
6977 /* Transfer dynamic linking information to the function descriptor. */
6978 if (fdh != NULL)
6979 {
6980 fdh->elf.ref_regular |= fh->elf.ref_regular;
6981 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
6982 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
6983 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
6984 fdh->elf.dynamic |= fh->elf.dynamic;
6985 fdh->elf.needs_plt |= (fh->elf.needs_plt
6986 || fh->elf.type == STT_FUNC
6987 || fh->elf.type == STT_GNU_IFUNC);
6988 move_plt_plist (fh, fdh);
6989
6990 if (!fdh->elf.forced_local
6991 && fh->elf.dynindx != -1)
6992 if (!bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
6993 return FALSE;
6994 }
6995
6996 /* Now that the info is on the function descriptor, clear the
6997 function code sym info. Any function code syms for which we
6998 don't have a definition in a regular file, we force local.
6999 This prevents a shared library from exporting syms that have
7000 been imported from another library. Function code syms that
7001 are really in the library we must leave global to prevent the
7002 linker dragging in a definition from a static library. */
7003 force_local = (!fh->elf.def_regular
7004 || fdh == NULL
7005 || !fdh->elf.def_regular
7006 || fdh->elf.forced_local);
7007 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
7008
7009 return TRUE;
7010 }
7011
7012 static const struct sfpr_def_parms save_res_funcs[] =
7013 {
7014 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
7015 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
7016 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
7017 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
7018 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
7019 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
7020 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
7021 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
7022 { "._savef", 14, 31, savefpr, savefpr1_tail },
7023 { "._restf", 14, 31, restfpr, restfpr1_tail },
7024 { "_savevr_", 20, 31, savevr, savevr_tail },
7025 { "_restvr_", 20, 31, restvr, restvr_tail }
7026 };
7027
7028 /* Called near the start of bfd_elf_size_dynamic_sections. We use
7029 this hook to a) provide some gcc support functions, and b) transfer
7030 dynamic linking information gathered so far on function code symbol
7031 entries, to their corresponding function descriptor symbol entries. */
7032
7033 static bfd_boolean
7034 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
7035 struct bfd_link_info *info)
7036 {
7037 struct ppc_link_hash_table *htab;
7038
7039 htab = ppc_hash_table (info);
7040 if (htab == NULL)
7041 return FALSE;
7042
7043 /* Provide any missing _save* and _rest* functions. */
7044 if (htab->sfpr != NULL)
7045 {
7046 unsigned int i;
7047
7048 htab->sfpr->size = 0;
7049 for (i = 0; i < ARRAY_SIZE (save_res_funcs); i++)
7050 if (!sfpr_define (info, &save_res_funcs[i], NULL))
7051 return FALSE;
7052 if (htab->sfpr->size == 0)
7053 htab->sfpr->flags |= SEC_EXCLUDE;
7054 }
7055
7056 if (bfd_link_relocatable (info))
7057 return TRUE;
7058
7059 if (htab->elf.hgot != NULL)
7060 {
7061 _bfd_elf_link_hash_hide_symbol (info, htab->elf.hgot, TRUE);
7062 /* Make .TOC. defined so as to prevent it being made dynamic.
7063 The wrong value here is fixed later in ppc64_elf_set_toc. */
7064 if (!htab->elf.hgot->def_regular
7065 || htab->elf.hgot->root.type != bfd_link_hash_defined)
7066 {
7067 htab->elf.hgot->root.type = bfd_link_hash_defined;
7068 htab->elf.hgot->root.u.def.value = 0;
7069 htab->elf.hgot->root.u.def.section = bfd_abs_section_ptr;
7070 htab->elf.hgot->def_regular = 1;
7071 htab->elf.hgot->root.linker_def = 1;
7072 }
7073 htab->elf.hgot->type = STT_OBJECT;
7074 htab->elf.hgot->other = ((htab->elf.hgot->other & ~ELF_ST_VISIBILITY (-1))
7075 | STV_HIDDEN);
7076 }
7077
7078 if (htab->need_func_desc_adj)
7079 {
7080 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
7081 htab->need_func_desc_adj = 0;
7082 }
7083
7084 return TRUE;
7085 }
7086
7087 /* Return true if we have dynamic relocs against H that apply to
7088 read-only sections. */
7089
7090 static bfd_boolean
7091 readonly_dynrelocs (struct elf_link_hash_entry *h)
7092 {
7093 struct ppc_link_hash_entry *eh;
7094 struct elf_dyn_relocs *p;
7095
7096 eh = (struct ppc_link_hash_entry *) h;
7097 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7098 {
7099 asection *s = p->sec->output_section;
7100
7101 if (s != NULL && (s->flags & SEC_READONLY) != 0)
7102 return TRUE;
7103 }
7104 return FALSE;
7105 }
7106
7107 /* Return true if we have dynamic relocs against H or any of its weak
7108 aliases, that apply to read-only sections. */
7109
7110 static bfd_boolean
7111 alias_readonly_dynrelocs (struct elf_link_hash_entry *h)
7112 {
7113 struct ppc_link_hash_entry *eh;
7114
7115 eh = (struct ppc_link_hash_entry *) h;
7116 do
7117 {
7118 if (readonly_dynrelocs (&eh->elf))
7119 return TRUE;
7120 eh = eh->weakref;
7121 } while (eh != NULL && &eh->elf != h);
7122
7123 return FALSE;
7124 }
7125
7126 /* Return whether EH has pc-relative dynamic relocs. */
7127
7128 static bfd_boolean
7129 pc_dynrelocs (struct ppc_link_hash_entry *eh)
7130 {
7131 struct elf_dyn_relocs *p;
7132
7133 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7134 if (p->pc_count != 0)
7135 return TRUE;
7136 return FALSE;
7137 }
7138
7139 /* Return true if a global entry stub will be created for H. Valid
7140 for ELFv2 before plt entries have been allocated. */
7141
7142 static bfd_boolean
7143 global_entry_stub (struct elf_link_hash_entry *h)
7144 {
7145 struct plt_entry *pent;
7146
7147 if (!h->pointer_equality_needed
7148 || h->def_regular)
7149 return FALSE;
7150
7151 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
7152 if (pent->plt.refcount > 0
7153 && pent->addend == 0)
7154 return TRUE;
7155
7156 return FALSE;
7157 }
7158
7159 /* Adjust a symbol defined by a dynamic object and referenced by a
7160 regular object. The current definition is in some section of the
7161 dynamic object, but we're not including those sections. We have to
7162 change the definition to something the rest of the link can
7163 understand. */
7164
7165 static bfd_boolean
7166 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
7167 struct elf_link_hash_entry *h)
7168 {
7169 struct ppc_link_hash_table *htab;
7170 asection *s, *srel;
7171
7172 htab = ppc_hash_table (info);
7173 if (htab == NULL)
7174 return FALSE;
7175
7176 /* Deal with function syms. */
7177 if (h->type == STT_FUNC
7178 || h->type == STT_GNU_IFUNC
7179 || h->needs_plt)
7180 {
7181 /* Clear procedure linkage table information for any symbol that
7182 won't need a .plt entry. */
7183 struct plt_entry *ent;
7184 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
7185 if (ent->plt.refcount > 0)
7186 break;
7187 if (ent == NULL
7188 || (h->type != STT_GNU_IFUNC
7189 && (SYMBOL_CALLS_LOCAL (info, h)
7190 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)))
7191 || ((struct ppc_link_hash_entry *) h)->save_res)
7192 {
7193 h->plt.plist = NULL;
7194 h->needs_plt = 0;
7195 h->pointer_equality_needed = 0;
7196 }
7197 else if (abiversion (info->output_bfd) >= 2)
7198 {
7199 /* Taking a function's address in a read/write section
7200 doesn't require us to define the function symbol in the
7201 executable on a global entry stub. A dynamic reloc can
7202 be used instead. The reason we prefer a few more dynamic
7203 relocs is that calling via a global entry stub costs a
7204 few more instructions, and pointer_equality_needed causes
7205 extra work in ld.so when resolving these symbols. */
7206 if (global_entry_stub (h)
7207 && !alias_readonly_dynrelocs (h))
7208 {
7209 h->pointer_equality_needed = 0;
7210 /* After adjust_dynamic_symbol, non_got_ref set in
7211 the non-pic case means that dyn_relocs for this
7212 symbol should be discarded. */
7213 h->non_got_ref = 0;
7214 }
7215
7216 /* If making a plt entry, then we don't need copy relocs. */
7217 return TRUE;
7218 }
7219 }
7220 else
7221 h->plt.plist = NULL;
7222
7223 /* If this is a weak symbol, and there is a real definition, the
7224 processor independent code will have arranged for us to see the
7225 real definition first, and we can just use the same value. */
7226 if (h->u.weakdef != NULL)
7227 {
7228 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
7229 || h->u.weakdef->root.type == bfd_link_hash_defweak);
7230 h->root.u.def.section = h->u.weakdef->root.u.def.section;
7231 h->root.u.def.value = h->u.weakdef->root.u.def.value;
7232 if (ELIMINATE_COPY_RELOCS)
7233 h->non_got_ref = h->u.weakdef->non_got_ref;
7234 return TRUE;
7235 }
7236
7237 /* If we are creating a shared library, we must presume that the
7238 only references to the symbol are via the global offset table.
7239 For such cases we need not do anything here; the relocations will
7240 be handled correctly by relocate_section. */
7241 if (bfd_link_pic (info))
7242 return TRUE;
7243
7244 /* If there are no references to this symbol that do not use the
7245 GOT, we don't need to generate a copy reloc. */
7246 if (!h->non_got_ref)
7247 return TRUE;
7248
7249 /* Don't generate a copy reloc for symbols defined in the executable. */
7250 if (!h->def_dynamic || !h->ref_regular || h->def_regular
7251
7252 /* If -z nocopyreloc was given, don't generate them either. */
7253 || info->nocopyreloc
7254
7255 /* If we didn't find any dynamic relocs in read-only sections, then
7256 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
7257 || (ELIMINATE_COPY_RELOCS && !alias_readonly_dynrelocs (h))
7258
7259 /* Protected variables do not work with .dynbss. The copy in
7260 .dynbss won't be used by the shared library with the protected
7261 definition for the variable. Text relocations are preferable
7262 to an incorrect program. */
7263 || h->protected_def)
7264 {
7265 h->non_got_ref = 0;
7266 return TRUE;
7267 }
7268
7269 if (h->plt.plist != NULL)
7270 {
7271 /* We should never get here, but unfortunately there are versions
7272 of gcc out there that improperly (for this ABI) put initialized
7273 function pointers, vtable refs and suchlike in read-only
7274 sections. Allow them to proceed, but warn that this might
7275 break at runtime. */
7276 info->callbacks->einfo
7277 (_("%P: copy reloc against `%T' requires lazy plt linking; "
7278 "avoid setting LD_BIND_NOW=1 or upgrade gcc\n"),
7279 h->root.root.string);
7280 }
7281
7282 /* This is a reference to a symbol defined by a dynamic object which
7283 is not a function. */
7284
7285 /* We must allocate the symbol in our .dynbss section, which will
7286 become part of the .bss section of the executable. There will be
7287 an entry for this symbol in the .dynsym section. The dynamic
7288 object will contain position independent code, so all references
7289 from the dynamic object to this symbol will go through the global
7290 offset table. The dynamic linker will use the .dynsym entry to
7291 determine the address it must put in the global offset table, so
7292 both the dynamic object and the regular object will refer to the
7293 same memory location for the variable. */
7294
7295 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
7296 to copy the initial value out of the dynamic object and into the
7297 runtime process image. We need to remember the offset into the
7298 .rela.bss section we are going to use. */
7299 if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
7300 {
7301 s = htab->elf.sdynrelro;
7302 srel = htab->elf.sreldynrelro;
7303 }
7304 else
7305 {
7306 s = htab->elf.sdynbss;
7307 srel = htab->elf.srelbss;
7308 }
7309 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
7310 {
7311 srel->size += sizeof (Elf64_External_Rela);
7312 h->needs_copy = 1;
7313 }
7314
7315 return _bfd_elf_adjust_dynamic_copy (info, h, s);
7316 }
7317
7318 /* If given a function descriptor symbol, hide both the function code
7319 sym and the descriptor. */
7320 static void
7321 ppc64_elf_hide_symbol (struct bfd_link_info *info,
7322 struct elf_link_hash_entry *h,
7323 bfd_boolean force_local)
7324 {
7325 struct ppc_link_hash_entry *eh;
7326 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
7327
7328 eh = (struct ppc_link_hash_entry *) h;
7329 if (eh->is_func_descriptor)
7330 {
7331 struct ppc_link_hash_entry *fh = eh->oh;
7332
7333 if (fh == NULL)
7334 {
7335 const char *p, *q;
7336 struct elf_link_hash_table *htab = elf_hash_table (info);
7337 char save;
7338
7339 /* We aren't supposed to use alloca in BFD because on
7340 systems which do not have alloca the version in libiberty
7341 calls xmalloc, which might cause the program to crash
7342 when it runs out of memory. This function doesn't have a
7343 return status, so there's no way to gracefully return an
7344 error. So cheat. We know that string[-1] can be safely
7345 accessed; It's either a string in an ELF string table,
7346 or allocated in an objalloc structure. */
7347
7348 p = eh->elf.root.root.string - 1;
7349 save = *p;
7350 *(char *) p = '.';
7351 fh = (struct ppc_link_hash_entry *)
7352 elf_link_hash_lookup (htab, p, FALSE, FALSE, FALSE);
7353 *(char *) p = save;
7354
7355 /* Unfortunately, if it so happens that the string we were
7356 looking for was allocated immediately before this string,
7357 then we overwrote the string terminator. That's the only
7358 reason the lookup should fail. */
7359 if (fh == NULL)
7360 {
7361 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
7362 while (q >= eh->elf.root.root.string && *q == *p)
7363 --q, --p;
7364 if (q < eh->elf.root.root.string && *p == '.')
7365 fh = (struct ppc_link_hash_entry *)
7366 elf_link_hash_lookup (htab, p, FALSE, FALSE, FALSE);
7367 }
7368 if (fh != NULL)
7369 {
7370 eh->oh = fh;
7371 fh->oh = eh;
7372 }
7373 }
7374 if (fh != NULL)
7375 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
7376 }
7377 }
7378
7379 static bfd_boolean
7380 get_sym_h (struct elf_link_hash_entry **hp,
7381 Elf_Internal_Sym **symp,
7382 asection **symsecp,
7383 unsigned char **tls_maskp,
7384 Elf_Internal_Sym **locsymsp,
7385 unsigned long r_symndx,
7386 bfd *ibfd)
7387 {
7388 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
7389
7390 if (r_symndx >= symtab_hdr->sh_info)
7391 {
7392 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
7393 struct elf_link_hash_entry *h;
7394
7395 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
7396 h = elf_follow_link (h);
7397
7398 if (hp != NULL)
7399 *hp = h;
7400
7401 if (symp != NULL)
7402 *symp = NULL;
7403
7404 if (symsecp != NULL)
7405 {
7406 asection *symsec = NULL;
7407 if (h->root.type == bfd_link_hash_defined
7408 || h->root.type == bfd_link_hash_defweak)
7409 symsec = h->root.u.def.section;
7410 *symsecp = symsec;
7411 }
7412
7413 if (tls_maskp != NULL)
7414 {
7415 struct ppc_link_hash_entry *eh;
7416
7417 eh = (struct ppc_link_hash_entry *) h;
7418 *tls_maskp = &eh->tls_mask;
7419 }
7420 }
7421 else
7422 {
7423 Elf_Internal_Sym *sym;
7424 Elf_Internal_Sym *locsyms = *locsymsp;
7425
7426 if (locsyms == NULL)
7427 {
7428 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
7429 if (locsyms == NULL)
7430 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
7431 symtab_hdr->sh_info,
7432 0, NULL, NULL, NULL);
7433 if (locsyms == NULL)
7434 return FALSE;
7435 *locsymsp = locsyms;
7436 }
7437 sym = locsyms + r_symndx;
7438
7439 if (hp != NULL)
7440 *hp = NULL;
7441
7442 if (symp != NULL)
7443 *symp = sym;
7444
7445 if (symsecp != NULL)
7446 *symsecp = bfd_section_from_elf_index (ibfd, sym->st_shndx);
7447
7448 if (tls_maskp != NULL)
7449 {
7450 struct got_entry **lgot_ents;
7451 unsigned char *tls_mask;
7452
7453 tls_mask = NULL;
7454 lgot_ents = elf_local_got_ents (ibfd);
7455 if (lgot_ents != NULL)
7456 {
7457 struct plt_entry **local_plt = (struct plt_entry **)
7458 (lgot_ents + symtab_hdr->sh_info);
7459 unsigned char *lgot_masks = (unsigned char *)
7460 (local_plt + symtab_hdr->sh_info);
7461 tls_mask = &lgot_masks[r_symndx];
7462 }
7463 *tls_maskp = tls_mask;
7464 }
7465 }
7466 return TRUE;
7467 }
7468
7469 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
7470 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
7471 type suitable for optimization, and 1 otherwise. */
7472
7473 static int
7474 get_tls_mask (unsigned char **tls_maskp,
7475 unsigned long *toc_symndx,
7476 bfd_vma *toc_addend,
7477 Elf_Internal_Sym **locsymsp,
7478 const Elf_Internal_Rela *rel,
7479 bfd *ibfd)
7480 {
7481 unsigned long r_symndx;
7482 int next_r;
7483 struct elf_link_hash_entry *h;
7484 Elf_Internal_Sym *sym;
7485 asection *sec;
7486 bfd_vma off;
7487
7488 r_symndx = ELF64_R_SYM (rel->r_info);
7489 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
7490 return 0;
7491
7492 if ((*tls_maskp != NULL && **tls_maskp != 0)
7493 || sec == NULL
7494 || ppc64_elf_section_data (sec) == NULL
7495 || ppc64_elf_section_data (sec)->sec_type != sec_toc)
7496 return 1;
7497
7498 /* Look inside a TOC section too. */
7499 if (h != NULL)
7500 {
7501 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
7502 off = h->root.u.def.value;
7503 }
7504 else
7505 off = sym->st_value;
7506 off += rel->r_addend;
7507 BFD_ASSERT (off % 8 == 0);
7508 r_symndx = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8];
7509 next_r = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8 + 1];
7510 if (toc_symndx != NULL)
7511 *toc_symndx = r_symndx;
7512 if (toc_addend != NULL)
7513 *toc_addend = ppc64_elf_section_data (sec)->u.toc.add[off / 8];
7514 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
7515 return 0;
7516 if ((h == NULL || is_static_defined (h))
7517 && (next_r == -1 || next_r == -2))
7518 return 1 - next_r;
7519 return 1;
7520 }
7521
7522 /* Find (or create) an entry in the tocsave hash table. */
7523
7524 static struct tocsave_entry *
7525 tocsave_find (struct ppc_link_hash_table *htab,
7526 enum insert_option insert,
7527 Elf_Internal_Sym **local_syms,
7528 const Elf_Internal_Rela *irela,
7529 bfd *ibfd)
7530 {
7531 unsigned long r_indx;
7532 struct elf_link_hash_entry *h;
7533 Elf_Internal_Sym *sym;
7534 struct tocsave_entry ent, *p;
7535 hashval_t hash;
7536 struct tocsave_entry **slot;
7537
7538 r_indx = ELF64_R_SYM (irela->r_info);
7539 if (!get_sym_h (&h, &sym, &ent.sec, NULL, local_syms, r_indx, ibfd))
7540 return NULL;
7541 if (ent.sec == NULL || ent.sec->output_section == NULL)
7542 {
7543 _bfd_error_handler
7544 (_("%B: undefined symbol on R_PPC64_TOCSAVE relocation"), ibfd);
7545 return NULL;
7546 }
7547
7548 if (h != NULL)
7549 ent.offset = h->root.u.def.value;
7550 else
7551 ent.offset = sym->st_value;
7552 ent.offset += irela->r_addend;
7553
7554 hash = tocsave_htab_hash (&ent);
7555 slot = ((struct tocsave_entry **)
7556 htab_find_slot_with_hash (htab->tocsave_htab, &ent, hash, insert));
7557 if (slot == NULL)
7558 return NULL;
7559
7560 if (*slot == NULL)
7561 {
7562 p = (struct tocsave_entry *) bfd_alloc (ibfd, sizeof (*p));
7563 if (p == NULL)
7564 return NULL;
7565 *p = ent;
7566 *slot = p;
7567 }
7568 return *slot;
7569 }
7570
7571 /* Adjust all global syms defined in opd sections. In gcc generated
7572 code for the old ABI, these will already have been done. */
7573
7574 static bfd_boolean
7575 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
7576 {
7577 struct ppc_link_hash_entry *eh;
7578 asection *sym_sec;
7579 struct _opd_sec_data *opd;
7580
7581 if (h->root.type == bfd_link_hash_indirect)
7582 return TRUE;
7583
7584 if (h->root.type != bfd_link_hash_defined
7585 && h->root.type != bfd_link_hash_defweak)
7586 return TRUE;
7587
7588 eh = (struct ppc_link_hash_entry *) h;
7589 if (eh->adjust_done)
7590 return TRUE;
7591
7592 sym_sec = eh->elf.root.u.def.section;
7593 opd = get_opd_info (sym_sec);
7594 if (opd != NULL && opd->adjust != NULL)
7595 {
7596 long adjust = opd->adjust[OPD_NDX (eh->elf.root.u.def.value)];
7597 if (adjust == -1)
7598 {
7599 /* This entry has been deleted. */
7600 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
7601 if (dsec == NULL)
7602 {
7603 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
7604 if (discarded_section (dsec))
7605 {
7606 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
7607 break;
7608 }
7609 }
7610 eh->elf.root.u.def.value = 0;
7611 eh->elf.root.u.def.section = dsec;
7612 }
7613 else
7614 eh->elf.root.u.def.value += adjust;
7615 eh->adjust_done = 1;
7616 }
7617 return TRUE;
7618 }
7619
7620 /* Handles decrementing dynamic reloc counts for the reloc specified by
7621 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM
7622 have already been determined. */
7623
7624 static bfd_boolean
7625 dec_dynrel_count (bfd_vma r_info,
7626 asection *sec,
7627 struct bfd_link_info *info,
7628 Elf_Internal_Sym **local_syms,
7629 struct elf_link_hash_entry *h,
7630 Elf_Internal_Sym *sym)
7631 {
7632 enum elf_ppc64_reloc_type r_type;
7633 asection *sym_sec = NULL;
7634
7635 /* Can this reloc be dynamic? This switch, and later tests here
7636 should be kept in sync with the code in check_relocs. */
7637 r_type = ELF64_R_TYPE (r_info);
7638 switch (r_type)
7639 {
7640 default:
7641 return TRUE;
7642
7643 case R_PPC64_TPREL16:
7644 case R_PPC64_TPREL16_LO:
7645 case R_PPC64_TPREL16_HI:
7646 case R_PPC64_TPREL16_HA:
7647 case R_PPC64_TPREL16_DS:
7648 case R_PPC64_TPREL16_LO_DS:
7649 case R_PPC64_TPREL16_HIGH:
7650 case R_PPC64_TPREL16_HIGHA:
7651 case R_PPC64_TPREL16_HIGHER:
7652 case R_PPC64_TPREL16_HIGHERA:
7653 case R_PPC64_TPREL16_HIGHEST:
7654 case R_PPC64_TPREL16_HIGHESTA:
7655 case R_PPC64_TPREL64:
7656 case R_PPC64_DTPMOD64:
7657 case R_PPC64_DTPREL64:
7658 case R_PPC64_ADDR64:
7659 case R_PPC64_REL30:
7660 case R_PPC64_REL32:
7661 case R_PPC64_REL64:
7662 case R_PPC64_ADDR14:
7663 case R_PPC64_ADDR14_BRNTAKEN:
7664 case R_PPC64_ADDR14_BRTAKEN:
7665 case R_PPC64_ADDR16:
7666 case R_PPC64_ADDR16_DS:
7667 case R_PPC64_ADDR16_HA:
7668 case R_PPC64_ADDR16_HI:
7669 case R_PPC64_ADDR16_HIGH:
7670 case R_PPC64_ADDR16_HIGHA:
7671 case R_PPC64_ADDR16_HIGHER:
7672 case R_PPC64_ADDR16_HIGHERA:
7673 case R_PPC64_ADDR16_HIGHEST:
7674 case R_PPC64_ADDR16_HIGHESTA:
7675 case R_PPC64_ADDR16_LO:
7676 case R_PPC64_ADDR16_LO_DS:
7677 case R_PPC64_ADDR24:
7678 case R_PPC64_ADDR32:
7679 case R_PPC64_UADDR16:
7680 case R_PPC64_UADDR32:
7681 case R_PPC64_UADDR64:
7682 case R_PPC64_TOC:
7683 break;
7684 }
7685
7686 if (local_syms != NULL)
7687 {
7688 unsigned long r_symndx;
7689 bfd *ibfd = sec->owner;
7690
7691 r_symndx = ELF64_R_SYM (r_info);
7692 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
7693 return FALSE;
7694 }
7695
7696 if ((bfd_link_pic (info)
7697 && (must_be_dyn_reloc (info, r_type)
7698 || (h != NULL
7699 && (!SYMBOLIC_BIND (info, h)
7700 || h->root.type == bfd_link_hash_defweak
7701 || !h->def_regular))))
7702 || (ELIMINATE_COPY_RELOCS
7703 && !bfd_link_pic (info)
7704 && h != NULL
7705 && (h->root.type == bfd_link_hash_defweak
7706 || !h->def_regular)))
7707 ;
7708 else
7709 return TRUE;
7710
7711 if (h != NULL)
7712 {
7713 struct elf_dyn_relocs *p;
7714 struct elf_dyn_relocs **pp;
7715 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
7716
7717 /* elf_gc_sweep may have already removed all dyn relocs associated
7718 with local syms for a given section. Also, symbol flags are
7719 changed by elf_gc_sweep_symbol, confusing the test above. Don't
7720 report a dynreloc miscount. */
7721 if (*pp == NULL && info->gc_sections)
7722 return TRUE;
7723
7724 while ((p = *pp) != NULL)
7725 {
7726 if (p->sec == sec)
7727 {
7728 if (!must_be_dyn_reloc (info, r_type))
7729 p->pc_count -= 1;
7730 p->count -= 1;
7731 if (p->count == 0)
7732 *pp = p->next;
7733 return TRUE;
7734 }
7735 pp = &p->next;
7736 }
7737 }
7738 else
7739 {
7740 struct ppc_dyn_relocs *p;
7741 struct ppc_dyn_relocs **pp;
7742 void *vpp;
7743 bfd_boolean is_ifunc;
7744
7745 if (local_syms == NULL)
7746 sym_sec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
7747 if (sym_sec == NULL)
7748 sym_sec = sec;
7749
7750 vpp = &elf_section_data (sym_sec)->local_dynrel;
7751 pp = (struct ppc_dyn_relocs **) vpp;
7752
7753 if (*pp == NULL && info->gc_sections)
7754 return TRUE;
7755
7756 is_ifunc = ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC;
7757 while ((p = *pp) != NULL)
7758 {
7759 if (p->sec == sec && p->ifunc == is_ifunc)
7760 {
7761 p->count -= 1;
7762 if (p->count == 0)
7763 *pp = p->next;
7764 return TRUE;
7765 }
7766 pp = &p->next;
7767 }
7768 }
7769
7770 /* xgettext:c-format */
7771 info->callbacks->einfo (_("%P: dynreloc miscount for %B, section %A\n"),
7772 sec->owner, sec);
7773 bfd_set_error (bfd_error_bad_value);
7774 return FALSE;
7775 }
7776
7777 /* Remove unused Official Procedure Descriptor entries. Currently we
7778 only remove those associated with functions in discarded link-once
7779 sections, or weakly defined functions that have been overridden. It
7780 would be possible to remove many more entries for statically linked
7781 applications. */
7782
7783 bfd_boolean
7784 ppc64_elf_edit_opd (struct bfd_link_info *info)
7785 {
7786 bfd *ibfd;
7787 bfd_boolean some_edited = FALSE;
7788 asection *need_pad = NULL;
7789 struct ppc_link_hash_table *htab;
7790
7791 htab = ppc_hash_table (info);
7792 if (htab == NULL)
7793 return FALSE;
7794
7795 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
7796 {
7797 asection *sec;
7798 Elf_Internal_Rela *relstart, *rel, *relend;
7799 Elf_Internal_Shdr *symtab_hdr;
7800 Elf_Internal_Sym *local_syms;
7801 struct _opd_sec_data *opd;
7802 bfd_boolean need_edit, add_aux_fields, broken;
7803 bfd_size_type cnt_16b = 0;
7804
7805 if (!is_ppc64_elf (ibfd))
7806 continue;
7807
7808 sec = bfd_get_section_by_name (ibfd, ".opd");
7809 if (sec == NULL || sec->size == 0)
7810 continue;
7811
7812 if (sec->sec_info_type == SEC_INFO_TYPE_JUST_SYMS)
7813 continue;
7814
7815 if (sec->output_section == bfd_abs_section_ptr)
7816 continue;
7817
7818 /* Look through the section relocs. */
7819 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
7820 continue;
7821
7822 local_syms = NULL;
7823 symtab_hdr = &elf_symtab_hdr (ibfd);
7824
7825 /* Read the relocations. */
7826 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7827 info->keep_memory);
7828 if (relstart == NULL)
7829 return FALSE;
7830
7831 /* First run through the relocs to check they are sane, and to
7832 determine whether we need to edit this opd section. */
7833 need_edit = FALSE;
7834 broken = FALSE;
7835 need_pad = sec;
7836 relend = relstart + sec->reloc_count;
7837 for (rel = relstart; rel < relend; )
7838 {
7839 enum elf_ppc64_reloc_type r_type;
7840 unsigned long r_symndx;
7841 asection *sym_sec;
7842 struct elf_link_hash_entry *h;
7843 Elf_Internal_Sym *sym;
7844 bfd_vma offset;
7845
7846 /* .opd contains an array of 16 or 24 byte entries. We're
7847 only interested in the reloc pointing to a function entry
7848 point. */
7849 offset = rel->r_offset;
7850 if (rel + 1 == relend
7851 || rel[1].r_offset != offset + 8)
7852 {
7853 /* If someone messes with .opd alignment then after a
7854 "ld -r" we might have padding in the middle of .opd.
7855 Also, there's nothing to prevent someone putting
7856 something silly in .opd with the assembler. No .opd
7857 optimization for them! */
7858 broken_opd:
7859 _bfd_error_handler
7860 (_("%B: .opd is not a regular array of opd entries"), ibfd);
7861 broken = TRUE;
7862 break;
7863 }
7864
7865 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
7866 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
7867 {
7868 _bfd_error_handler
7869 /* xgettext:c-format */
7870 (_("%B: unexpected reloc type %u in .opd section"),
7871 ibfd, r_type);
7872 broken = TRUE;
7873 break;
7874 }
7875
7876 r_symndx = ELF64_R_SYM (rel->r_info);
7877 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7878 r_symndx, ibfd))
7879 goto error_ret;
7880
7881 if (sym_sec == NULL || sym_sec->owner == NULL)
7882 {
7883 const char *sym_name;
7884 if (h != NULL)
7885 sym_name = h->root.root.string;
7886 else
7887 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
7888 sym_sec);
7889
7890 _bfd_error_handler
7891 /* xgettext:c-format */
7892 (_("%B: undefined sym `%s' in .opd section"),
7893 ibfd, sym_name);
7894 broken = TRUE;
7895 break;
7896 }
7897
7898 /* opd entries are always for functions defined in the
7899 current input bfd. If the symbol isn't defined in the
7900 input bfd, then we won't be using the function in this
7901 bfd; It must be defined in a linkonce section in another
7902 bfd, or is weak. It's also possible that we are
7903 discarding the function due to a linker script /DISCARD/,
7904 which we test for via the output_section. */
7905 if (sym_sec->owner != ibfd
7906 || sym_sec->output_section == bfd_abs_section_ptr)
7907 need_edit = TRUE;
7908
7909 rel += 2;
7910 if (rel + 1 == relend
7911 || (rel + 2 < relend
7912 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC))
7913 ++rel;
7914
7915 if (rel == relend)
7916 {
7917 if (sec->size == offset + 24)
7918 {
7919 need_pad = NULL;
7920 break;
7921 }
7922 if (sec->size == offset + 16)
7923 {
7924 cnt_16b++;
7925 break;
7926 }
7927 goto broken_opd;
7928 }
7929 else if (rel + 1 < relend
7930 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
7931 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
7932 {
7933 if (rel[0].r_offset == offset + 16)
7934 cnt_16b++;
7935 else if (rel[0].r_offset != offset + 24)
7936 goto broken_opd;
7937 }
7938 else
7939 goto broken_opd;
7940 }
7941
7942 add_aux_fields = htab->params->non_overlapping_opd && cnt_16b > 0;
7943
7944 if (!broken && (need_edit || add_aux_fields))
7945 {
7946 Elf_Internal_Rela *write_rel;
7947 Elf_Internal_Shdr *rel_hdr;
7948 bfd_byte *rptr, *wptr;
7949 bfd_byte *new_contents;
7950 bfd_size_type amt;
7951
7952 new_contents = NULL;
7953 amt = OPD_NDX (sec->size) * sizeof (long);
7954 opd = &ppc64_elf_section_data (sec)->u.opd;
7955 opd->adjust = bfd_zalloc (sec->owner, amt);
7956 if (opd->adjust == NULL)
7957 return FALSE;
7958
7959 /* This seems a waste of time as input .opd sections are all
7960 zeros as generated by gcc, but I suppose there's no reason
7961 this will always be so. We might start putting something in
7962 the third word of .opd entries. */
7963 if ((sec->flags & SEC_IN_MEMORY) == 0)
7964 {
7965 bfd_byte *loc;
7966 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
7967 {
7968 if (loc != NULL)
7969 free (loc);
7970 error_ret:
7971 if (local_syms != NULL
7972 && symtab_hdr->contents != (unsigned char *) local_syms)
7973 free (local_syms);
7974 if (elf_section_data (sec)->relocs != relstart)
7975 free (relstart);
7976 return FALSE;
7977 }
7978 sec->contents = loc;
7979 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
7980 }
7981
7982 elf_section_data (sec)->relocs = relstart;
7983
7984 new_contents = sec->contents;
7985 if (add_aux_fields)
7986 {
7987 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
7988 if (new_contents == NULL)
7989 return FALSE;
7990 need_pad = NULL;
7991 }
7992 wptr = new_contents;
7993 rptr = sec->contents;
7994 write_rel = relstart;
7995 for (rel = relstart; rel < relend; )
7996 {
7997 unsigned long r_symndx;
7998 asection *sym_sec;
7999 struct elf_link_hash_entry *h;
8000 struct ppc_link_hash_entry *fdh = NULL;
8001 Elf_Internal_Sym *sym;
8002 long opd_ent_size;
8003 Elf_Internal_Rela *next_rel;
8004 bfd_boolean skip;
8005
8006 r_symndx = ELF64_R_SYM (rel->r_info);
8007 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8008 r_symndx, ibfd))
8009 goto error_ret;
8010
8011 next_rel = rel + 2;
8012 if (next_rel + 1 == relend
8013 || (next_rel + 2 < relend
8014 && ELF64_R_TYPE (next_rel[2].r_info) == R_PPC64_TOC))
8015 ++next_rel;
8016
8017 /* See if the .opd entry is full 24 byte or
8018 16 byte (with fd_aux entry overlapped with next
8019 fd_func). */
8020 opd_ent_size = 24;
8021 if (next_rel == relend)
8022 {
8023 if (sec->size == rel->r_offset + 16)
8024 opd_ent_size = 16;
8025 }
8026 else if (next_rel->r_offset == rel->r_offset + 16)
8027 opd_ent_size = 16;
8028
8029 if (h != NULL
8030 && h->root.root.string[0] == '.')
8031 {
8032 fdh = ((struct ppc_link_hash_entry *) h)->oh;
8033 if (fdh != NULL)
8034 {
8035 fdh = ppc_follow_link (fdh);
8036 if (fdh->elf.root.type != bfd_link_hash_defined
8037 && fdh->elf.root.type != bfd_link_hash_defweak)
8038 fdh = NULL;
8039 }
8040 }
8041
8042 skip = (sym_sec->owner != ibfd
8043 || sym_sec->output_section == bfd_abs_section_ptr);
8044 if (skip)
8045 {
8046 if (fdh != NULL && sym_sec->owner == ibfd)
8047 {
8048 /* Arrange for the function descriptor sym
8049 to be dropped. */
8050 fdh->elf.root.u.def.value = 0;
8051 fdh->elf.root.u.def.section = sym_sec;
8052 }
8053 opd->adjust[OPD_NDX (rel->r_offset)] = -1;
8054
8055 if (NO_OPD_RELOCS || bfd_link_relocatable (info))
8056 rel = next_rel;
8057 else
8058 while (1)
8059 {
8060 if (!dec_dynrel_count (rel->r_info, sec, info,
8061 NULL, h, sym))
8062 goto error_ret;
8063
8064 if (++rel == next_rel)
8065 break;
8066
8067 r_symndx = ELF64_R_SYM (rel->r_info);
8068 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8069 r_symndx, ibfd))
8070 goto error_ret;
8071 }
8072 }
8073 else
8074 {
8075 /* We'll be keeping this opd entry. */
8076 long adjust;
8077
8078 if (fdh != NULL)
8079 {
8080 /* Redefine the function descriptor symbol to
8081 this location in the opd section. It is
8082 necessary to update the value here rather
8083 than using an array of adjustments as we do
8084 for local symbols, because various places
8085 in the generic ELF code use the value
8086 stored in u.def.value. */
8087 fdh->elf.root.u.def.value = wptr - new_contents;
8088 fdh->adjust_done = 1;
8089 }
8090
8091 /* Local syms are a bit tricky. We could
8092 tweak them as they can be cached, but
8093 we'd need to look through the local syms
8094 for the function descriptor sym which we
8095 don't have at the moment. So keep an
8096 array of adjustments. */
8097 adjust = (wptr - new_contents) - (rptr - sec->contents);
8098 opd->adjust[OPD_NDX (rel->r_offset)] = adjust;
8099
8100 if (wptr != rptr)
8101 memcpy (wptr, rptr, opd_ent_size);
8102 wptr += opd_ent_size;
8103 if (add_aux_fields && opd_ent_size == 16)
8104 {
8105 memset (wptr, '\0', 8);
8106 wptr += 8;
8107 }
8108
8109 /* We need to adjust any reloc offsets to point to the
8110 new opd entries. */
8111 for ( ; rel != next_rel; ++rel)
8112 {
8113 rel->r_offset += adjust;
8114 if (write_rel != rel)
8115 memcpy (write_rel, rel, sizeof (*rel));
8116 ++write_rel;
8117 }
8118 }
8119
8120 rptr += opd_ent_size;
8121 }
8122
8123 sec->size = wptr - new_contents;
8124 sec->reloc_count = write_rel - relstart;
8125 if (add_aux_fields)
8126 {
8127 free (sec->contents);
8128 sec->contents = new_contents;
8129 }
8130
8131 /* Fudge the header size too, as this is used later in
8132 elf_bfd_final_link if we are emitting relocs. */
8133 rel_hdr = _bfd_elf_single_rel_hdr (sec);
8134 rel_hdr->sh_size = sec->reloc_count * rel_hdr->sh_entsize;
8135 some_edited = TRUE;
8136 }
8137 else if (elf_section_data (sec)->relocs != relstart)
8138 free (relstart);
8139
8140 if (local_syms != NULL
8141 && symtab_hdr->contents != (unsigned char *) local_syms)
8142 {
8143 if (!info->keep_memory)
8144 free (local_syms);
8145 else
8146 symtab_hdr->contents = (unsigned char *) local_syms;
8147 }
8148 }
8149
8150 if (some_edited)
8151 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
8152
8153 /* If we are doing a final link and the last .opd entry is just 16 byte
8154 long, add a 8 byte padding after it. */
8155 if (need_pad != NULL && !bfd_link_relocatable (info))
8156 {
8157 bfd_byte *p;
8158
8159 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
8160 {
8161 BFD_ASSERT (need_pad->size > 0);
8162
8163 p = bfd_malloc (need_pad->size + 8);
8164 if (p == NULL)
8165 return FALSE;
8166
8167 if (! bfd_get_section_contents (need_pad->owner, need_pad,
8168 p, 0, need_pad->size))
8169 return FALSE;
8170
8171 need_pad->contents = p;
8172 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
8173 }
8174 else
8175 {
8176 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
8177 if (p == NULL)
8178 return FALSE;
8179
8180 need_pad->contents = p;
8181 }
8182
8183 memset (need_pad->contents + need_pad->size, 0, 8);
8184 need_pad->size += 8;
8185 }
8186
8187 return TRUE;
8188 }
8189
8190 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
8191
8192 asection *
8193 ppc64_elf_tls_setup (struct bfd_link_info *info)
8194 {
8195 struct ppc_link_hash_table *htab;
8196
8197 htab = ppc_hash_table (info);
8198 if (htab == NULL)
8199 return NULL;
8200
8201 if (abiversion (info->output_bfd) == 1)
8202 htab->opd_abi = 1;
8203
8204 if (htab->params->no_multi_toc)
8205 htab->do_multi_toc = 0;
8206 else if (!htab->do_multi_toc)
8207 htab->params->no_multi_toc = 1;
8208
8209 /* Default to --no-plt-localentry, as this option can cause problems
8210 with symbol interposition. For example, glibc libpthread.so and
8211 libc.so duplicate many pthread symbols, with a fallback
8212 implementation in libc.so. In some cases the fallback does more
8213 work than the pthread implementation. __pthread_condattr_destroy
8214 is one such symbol: the libpthread.so implementation is
8215 localentry:0 while the libc.so implementation is localentry:8.
8216 An app that "cleverly" uses dlopen to only load necessary
8217 libraries at runtime may omit loading libpthread.so when not
8218 running multi-threaded, which then results in the libc.so
8219 fallback symbols being used and ld.so complaining. Now there
8220 are workarounds in ld (see non_zero_localentry) to detect the
8221 pthread situation, but that may not be the only case where
8222 --plt-localentry can cause trouble. */
8223 if (htab->params->plt_localentry0 < 0)
8224 htab->params->plt_localentry0 = 0;
8225 if (htab->params->plt_localentry0
8226 && elf_link_hash_lookup (&htab->elf, "GLIBC_2.26",
8227 FALSE, FALSE, FALSE) == NULL)
8228 info->callbacks->einfo
8229 (_("%P: warning: --plt-localentry is especially dangerous without "
8230 "ld.so support to detect ABI violations.\n"));
8231
8232 htab->tls_get_addr = ((struct ppc_link_hash_entry *)
8233 elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
8234 FALSE, FALSE, TRUE));
8235 /* Move dynamic linking info to the function descriptor sym. */
8236 if (htab->tls_get_addr != NULL)
8237 func_desc_adjust (&htab->tls_get_addr->elf, info);
8238 htab->tls_get_addr_fd = ((struct ppc_link_hash_entry *)
8239 elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
8240 FALSE, FALSE, TRUE));
8241 if (htab->params->tls_get_addr_opt)
8242 {
8243 struct elf_link_hash_entry *opt, *opt_fd, *tga, *tga_fd;
8244
8245 opt = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr_opt",
8246 FALSE, FALSE, TRUE);
8247 if (opt != NULL)
8248 func_desc_adjust (opt, info);
8249 opt_fd = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
8250 FALSE, FALSE, TRUE);
8251 if (opt_fd != NULL
8252 && (opt_fd->root.type == bfd_link_hash_defined
8253 || opt_fd->root.type == bfd_link_hash_defweak))
8254 {
8255 /* If glibc supports an optimized __tls_get_addr call stub,
8256 signalled by the presence of __tls_get_addr_opt, and we'll
8257 be calling __tls_get_addr via a plt call stub, then
8258 make __tls_get_addr point to __tls_get_addr_opt. */
8259 tga_fd = &htab->tls_get_addr_fd->elf;
8260 if (htab->elf.dynamic_sections_created
8261 && tga_fd != NULL
8262 && (tga_fd->type == STT_FUNC
8263 || tga_fd->needs_plt)
8264 && !(SYMBOL_CALLS_LOCAL (info, tga_fd)
8265 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, tga_fd)))
8266 {
8267 struct plt_entry *ent;
8268
8269 for (ent = tga_fd->plt.plist; ent != NULL; ent = ent->next)
8270 if (ent->plt.refcount > 0)
8271 break;
8272 if (ent != NULL)
8273 {
8274 tga_fd->root.type = bfd_link_hash_indirect;
8275 tga_fd->root.u.i.link = &opt_fd->root;
8276 ppc64_elf_copy_indirect_symbol (info, opt_fd, tga_fd);
8277 opt_fd->mark = 1;
8278 if (opt_fd->dynindx != -1)
8279 {
8280 /* Use __tls_get_addr_opt in dynamic relocations. */
8281 opt_fd->dynindx = -1;
8282 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
8283 opt_fd->dynstr_index);
8284 if (!bfd_elf_link_record_dynamic_symbol (info, opt_fd))
8285 return NULL;
8286 }
8287 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) opt_fd;
8288 tga = &htab->tls_get_addr->elf;
8289 if (opt != NULL && tga != NULL)
8290 {
8291 tga->root.type = bfd_link_hash_indirect;
8292 tga->root.u.i.link = &opt->root;
8293 ppc64_elf_copy_indirect_symbol (info, opt, tga);
8294 opt->mark = 1;
8295 _bfd_elf_link_hash_hide_symbol (info, opt,
8296 tga->forced_local);
8297 htab->tls_get_addr = (struct ppc_link_hash_entry *) opt;
8298 }
8299 htab->tls_get_addr_fd->oh = htab->tls_get_addr;
8300 htab->tls_get_addr_fd->is_func_descriptor = 1;
8301 if (htab->tls_get_addr != NULL)
8302 {
8303 htab->tls_get_addr->oh = htab->tls_get_addr_fd;
8304 htab->tls_get_addr->is_func = 1;
8305 }
8306 }
8307 }
8308 }
8309 else if (htab->params->tls_get_addr_opt < 0)
8310 htab->params->tls_get_addr_opt = 0;
8311 }
8312 return _bfd_elf_tls_setup (info->output_bfd, info);
8313 }
8314
8315 /* Return TRUE iff REL is a branch reloc with a global symbol matching
8316 HASH1 or HASH2. */
8317
8318 static bfd_boolean
8319 branch_reloc_hash_match (const bfd *ibfd,
8320 const Elf_Internal_Rela *rel,
8321 const struct ppc_link_hash_entry *hash1,
8322 const struct ppc_link_hash_entry *hash2)
8323 {
8324 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
8325 enum elf_ppc64_reloc_type r_type = ELF64_R_TYPE (rel->r_info);
8326 unsigned int r_symndx = ELF64_R_SYM (rel->r_info);
8327
8328 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
8329 {
8330 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
8331 struct elf_link_hash_entry *h;
8332
8333 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
8334 h = elf_follow_link (h);
8335 if (h == &hash1->elf || h == &hash2->elf)
8336 return TRUE;
8337 }
8338 return FALSE;
8339 }
8340
8341 /* Run through all the TLS relocs looking for optimization
8342 opportunities. The linker has been hacked (see ppc64elf.em) to do
8343 a preliminary section layout so that we know the TLS segment
8344 offsets. We can't optimize earlier because some optimizations need
8345 to know the tp offset, and we need to optimize before allocating
8346 dynamic relocations. */
8347
8348 bfd_boolean
8349 ppc64_elf_tls_optimize (struct bfd_link_info *info)
8350 {
8351 bfd *ibfd;
8352 asection *sec;
8353 struct ppc_link_hash_table *htab;
8354 unsigned char *toc_ref;
8355 int pass;
8356
8357 if (!bfd_link_executable (info))
8358 return TRUE;
8359
8360 htab = ppc_hash_table (info);
8361 if (htab == NULL)
8362 return FALSE;
8363
8364 /* Make two passes over the relocs. On the first pass, mark toc
8365 entries involved with tls relocs, and check that tls relocs
8366 involved in setting up a tls_get_addr call are indeed followed by
8367 such a call. If they are not, we can't do any tls optimization.
8368 On the second pass twiddle tls_mask flags to notify
8369 relocate_section that optimization can be done, and adjust got
8370 and plt refcounts. */
8371 toc_ref = NULL;
8372 for (pass = 0; pass < 2; ++pass)
8373 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
8374 {
8375 Elf_Internal_Sym *locsyms = NULL;
8376 asection *toc = bfd_get_section_by_name (ibfd, ".toc");
8377
8378 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8379 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
8380 {
8381 Elf_Internal_Rela *relstart, *rel, *relend;
8382 bfd_boolean found_tls_get_addr_arg = 0;
8383
8384 /* Read the relocations. */
8385 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8386 info->keep_memory);
8387 if (relstart == NULL)
8388 {
8389 free (toc_ref);
8390 return FALSE;
8391 }
8392
8393 relend = relstart + sec->reloc_count;
8394 for (rel = relstart; rel < relend; rel++)
8395 {
8396 enum elf_ppc64_reloc_type r_type;
8397 unsigned long r_symndx;
8398 struct elf_link_hash_entry *h;
8399 Elf_Internal_Sym *sym;
8400 asection *sym_sec;
8401 unsigned char *tls_mask;
8402 unsigned char tls_set, tls_clear, tls_type = 0;
8403 bfd_vma value;
8404 bfd_boolean ok_tprel, is_local;
8405 long toc_ref_index = 0;
8406 int expecting_tls_get_addr = 0;
8407 bfd_boolean ret = FALSE;
8408
8409 r_symndx = ELF64_R_SYM (rel->r_info);
8410 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
8411 r_symndx, ibfd))
8412 {
8413 err_free_rel:
8414 if (elf_section_data (sec)->relocs != relstart)
8415 free (relstart);
8416 if (toc_ref != NULL)
8417 free (toc_ref);
8418 if (locsyms != NULL
8419 && (elf_symtab_hdr (ibfd).contents
8420 != (unsigned char *) locsyms))
8421 free (locsyms);
8422 return ret;
8423 }
8424
8425 if (h != NULL)
8426 {
8427 if (h->root.type == bfd_link_hash_defined
8428 || h->root.type == bfd_link_hash_defweak)
8429 value = h->root.u.def.value;
8430 else if (h->root.type == bfd_link_hash_undefweak)
8431 value = 0;
8432 else
8433 {
8434 found_tls_get_addr_arg = 0;
8435 continue;
8436 }
8437 }
8438 else
8439 /* Symbols referenced by TLS relocs must be of type
8440 STT_TLS. So no need for .opd local sym adjust. */
8441 value = sym->st_value;
8442
8443 ok_tprel = FALSE;
8444 is_local = FALSE;
8445 if (h == NULL
8446 || !h->def_dynamic)
8447 {
8448 is_local = TRUE;
8449 if (h != NULL
8450 && h->root.type == bfd_link_hash_undefweak)
8451 ok_tprel = TRUE;
8452 else if (sym_sec != NULL
8453 && sym_sec->output_section != NULL)
8454 {
8455 value += sym_sec->output_offset;
8456 value += sym_sec->output_section->vma;
8457 value -= htab->elf.tls_sec->vma;
8458 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
8459 < (bfd_vma) 1 << 32);
8460 }
8461 }
8462
8463 r_type = ELF64_R_TYPE (rel->r_info);
8464 /* If this section has old-style __tls_get_addr calls
8465 without marker relocs, then check that each
8466 __tls_get_addr call reloc is preceded by a reloc
8467 that conceivably belongs to the __tls_get_addr arg
8468 setup insn. If we don't find matching arg setup
8469 relocs, don't do any tls optimization. */
8470 if (pass == 0
8471 && sec->has_tls_get_addr_call
8472 && h != NULL
8473 && (h == &htab->tls_get_addr->elf
8474 || h == &htab->tls_get_addr_fd->elf)
8475 && !found_tls_get_addr_arg
8476 && is_branch_reloc (r_type))
8477 {
8478 info->callbacks->minfo (_("%H __tls_get_addr lost arg, "
8479 "TLS optimization disabled\n"),
8480 ibfd, sec, rel->r_offset);
8481 ret = TRUE;
8482 goto err_free_rel;
8483 }
8484
8485 found_tls_get_addr_arg = 0;
8486 switch (r_type)
8487 {
8488 case R_PPC64_GOT_TLSLD16:
8489 case R_PPC64_GOT_TLSLD16_LO:
8490 expecting_tls_get_addr = 1;
8491 found_tls_get_addr_arg = 1;
8492 /* Fall through. */
8493
8494 case R_PPC64_GOT_TLSLD16_HI:
8495 case R_PPC64_GOT_TLSLD16_HA:
8496 /* These relocs should never be against a symbol
8497 defined in a shared lib. Leave them alone if
8498 that turns out to be the case. */
8499 if (!is_local)
8500 continue;
8501
8502 /* LD -> LE */
8503 tls_set = 0;
8504 tls_clear = TLS_LD;
8505 tls_type = TLS_TLS | TLS_LD;
8506 break;
8507
8508 case R_PPC64_GOT_TLSGD16:
8509 case R_PPC64_GOT_TLSGD16_LO:
8510 expecting_tls_get_addr = 1;
8511 found_tls_get_addr_arg = 1;
8512 /* Fall through. */
8513
8514 case R_PPC64_GOT_TLSGD16_HI:
8515 case R_PPC64_GOT_TLSGD16_HA:
8516 if (ok_tprel)
8517 /* GD -> LE */
8518 tls_set = 0;
8519 else
8520 /* GD -> IE */
8521 tls_set = TLS_TLS | TLS_TPRELGD;
8522 tls_clear = TLS_GD;
8523 tls_type = TLS_TLS | TLS_GD;
8524 break;
8525
8526 case R_PPC64_GOT_TPREL16_DS:
8527 case R_PPC64_GOT_TPREL16_LO_DS:
8528 case R_PPC64_GOT_TPREL16_HI:
8529 case R_PPC64_GOT_TPREL16_HA:
8530 if (ok_tprel)
8531 {
8532 /* IE -> LE */
8533 tls_set = 0;
8534 tls_clear = TLS_TPREL;
8535 tls_type = TLS_TLS | TLS_TPREL;
8536 break;
8537 }
8538 continue;
8539
8540 case R_PPC64_TLSGD:
8541 case R_PPC64_TLSLD:
8542 found_tls_get_addr_arg = 1;
8543 /* Fall through. */
8544
8545 case R_PPC64_TLS:
8546 case R_PPC64_TOC16:
8547 case R_PPC64_TOC16_LO:
8548 if (sym_sec == NULL || sym_sec != toc)
8549 continue;
8550
8551 /* Mark this toc entry as referenced by a TLS
8552 code sequence. We can do that now in the
8553 case of R_PPC64_TLS, and after checking for
8554 tls_get_addr for the TOC16 relocs. */
8555 if (toc_ref == NULL)
8556 toc_ref = bfd_zmalloc (toc->output_section->rawsize / 8);
8557 if (toc_ref == NULL)
8558 goto err_free_rel;
8559
8560 if (h != NULL)
8561 value = h->root.u.def.value;
8562 else
8563 value = sym->st_value;
8564 value += rel->r_addend;
8565 if (value % 8 != 0)
8566 continue;
8567 BFD_ASSERT (value < toc->size
8568 && toc->output_offset % 8 == 0);
8569 toc_ref_index = (value + toc->output_offset) / 8;
8570 if (r_type == R_PPC64_TLS
8571 || r_type == R_PPC64_TLSGD
8572 || r_type == R_PPC64_TLSLD)
8573 {
8574 toc_ref[toc_ref_index] = 1;
8575 continue;
8576 }
8577
8578 if (pass != 0 && toc_ref[toc_ref_index] == 0)
8579 continue;
8580
8581 tls_set = 0;
8582 tls_clear = 0;
8583 expecting_tls_get_addr = 2;
8584 break;
8585
8586 case R_PPC64_TPREL64:
8587 if (pass == 0
8588 || sec != toc
8589 || toc_ref == NULL
8590 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
8591 continue;
8592 if (ok_tprel)
8593 {
8594 /* IE -> LE */
8595 tls_set = TLS_EXPLICIT;
8596 tls_clear = TLS_TPREL;
8597 break;
8598 }
8599 continue;
8600
8601 case R_PPC64_DTPMOD64:
8602 if (pass == 0
8603 || sec != toc
8604 || toc_ref == NULL
8605 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
8606 continue;
8607 if (rel + 1 < relend
8608 && (rel[1].r_info
8609 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
8610 && rel[1].r_offset == rel->r_offset + 8)
8611 {
8612 if (ok_tprel)
8613 /* GD -> LE */
8614 tls_set = TLS_EXPLICIT | TLS_GD;
8615 else
8616 /* GD -> IE */
8617 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
8618 tls_clear = TLS_GD;
8619 }
8620 else
8621 {
8622 if (!is_local)
8623 continue;
8624
8625 /* LD -> LE */
8626 tls_set = TLS_EXPLICIT;
8627 tls_clear = TLS_LD;
8628 }
8629 break;
8630
8631 default:
8632 continue;
8633 }
8634
8635 if (pass == 0)
8636 {
8637 if (!expecting_tls_get_addr
8638 || !sec->has_tls_get_addr_call)
8639 continue;
8640
8641 if (rel + 1 < relend
8642 && branch_reloc_hash_match (ibfd, rel + 1,
8643 htab->tls_get_addr,
8644 htab->tls_get_addr_fd))
8645 {
8646 if (expecting_tls_get_addr == 2)
8647 {
8648 /* Check for toc tls entries. */
8649 unsigned char *toc_tls;
8650 int retval;
8651
8652 retval = get_tls_mask (&toc_tls, NULL, NULL,
8653 &locsyms,
8654 rel, ibfd);
8655 if (retval == 0)
8656 goto err_free_rel;
8657 if (toc_tls != NULL)
8658 {
8659 if ((*toc_tls & (TLS_GD | TLS_LD)) != 0)
8660 found_tls_get_addr_arg = 1;
8661 if (retval > 1)
8662 toc_ref[toc_ref_index] = 1;
8663 }
8664 }
8665 continue;
8666 }
8667
8668 if (expecting_tls_get_addr != 1)
8669 continue;
8670
8671 /* Uh oh, we didn't find the expected call. We
8672 could just mark this symbol to exclude it
8673 from tls optimization but it's safer to skip
8674 the entire optimization. */
8675 /* xgettext:c-format */
8676 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
8677 "TLS optimization disabled\n"),
8678 ibfd, sec, rel->r_offset);
8679 ret = TRUE;
8680 goto err_free_rel;
8681 }
8682
8683 if (expecting_tls_get_addr && htab->tls_get_addr != NULL)
8684 {
8685 struct plt_entry *ent;
8686 for (ent = htab->tls_get_addr->elf.plt.plist;
8687 ent != NULL;
8688 ent = ent->next)
8689 if (ent->addend == 0)
8690 {
8691 if (ent->plt.refcount > 0)
8692 {
8693 ent->plt.refcount -= 1;
8694 expecting_tls_get_addr = 0;
8695 }
8696 break;
8697 }
8698 }
8699
8700 if (expecting_tls_get_addr && htab->tls_get_addr_fd != NULL)
8701 {
8702 struct plt_entry *ent;
8703 for (ent = htab->tls_get_addr_fd->elf.plt.plist;
8704 ent != NULL;
8705 ent = ent->next)
8706 if (ent->addend == 0)
8707 {
8708 if (ent->plt.refcount > 0)
8709 ent->plt.refcount -= 1;
8710 break;
8711 }
8712 }
8713
8714 if (tls_clear == 0)
8715 continue;
8716
8717 if ((tls_set & TLS_EXPLICIT) == 0)
8718 {
8719 struct got_entry *ent;
8720
8721 /* Adjust got entry for this reloc. */
8722 if (h != NULL)
8723 ent = h->got.glist;
8724 else
8725 ent = elf_local_got_ents (ibfd)[r_symndx];
8726
8727 for (; ent != NULL; ent = ent->next)
8728 if (ent->addend == rel->r_addend
8729 && ent->owner == ibfd
8730 && ent->tls_type == tls_type)
8731 break;
8732 if (ent == NULL)
8733 abort ();
8734
8735 if (tls_set == 0)
8736 {
8737 /* We managed to get rid of a got entry. */
8738 if (ent->got.refcount > 0)
8739 ent->got.refcount -= 1;
8740 }
8741 }
8742 else
8743 {
8744 /* If we got rid of a DTPMOD/DTPREL reloc pair then
8745 we'll lose one or two dyn relocs. */
8746 if (!dec_dynrel_count (rel->r_info, sec, info,
8747 NULL, h, sym))
8748 return FALSE;
8749
8750 if (tls_set == (TLS_EXPLICIT | TLS_GD))
8751 {
8752 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
8753 NULL, h, sym))
8754 return FALSE;
8755 }
8756 }
8757
8758 *tls_mask |= tls_set;
8759 *tls_mask &= ~tls_clear;
8760 }
8761
8762 if (elf_section_data (sec)->relocs != relstart)
8763 free (relstart);
8764 }
8765
8766 if (locsyms != NULL
8767 && (elf_symtab_hdr (ibfd).contents != (unsigned char *) locsyms))
8768 {
8769 if (!info->keep_memory)
8770 free (locsyms);
8771 else
8772 elf_symtab_hdr (ibfd).contents = (unsigned char *) locsyms;
8773 }
8774 }
8775
8776 if (toc_ref != NULL)
8777 free (toc_ref);
8778 htab->do_tls_opt = 1;
8779 return TRUE;
8780 }
8781
8782 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
8783 the values of any global symbols in a toc section that has been
8784 edited. Globals in toc sections should be a rarity, so this function
8785 sets a flag if any are found in toc sections other than the one just
8786 edited, so that further hash table traversals can be avoided. */
8787
8788 struct adjust_toc_info
8789 {
8790 asection *toc;
8791 unsigned long *skip;
8792 bfd_boolean global_toc_syms;
8793 };
8794
8795 enum toc_skip_enum { ref_from_discarded = 1, can_optimize = 2 };
8796
8797 static bfd_boolean
8798 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
8799 {
8800 struct ppc_link_hash_entry *eh;
8801 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
8802 unsigned long i;
8803
8804 if (h->root.type != bfd_link_hash_defined
8805 && h->root.type != bfd_link_hash_defweak)
8806 return TRUE;
8807
8808 eh = (struct ppc_link_hash_entry *) h;
8809 if (eh->adjust_done)
8810 return TRUE;
8811
8812 if (eh->elf.root.u.def.section == toc_inf->toc)
8813 {
8814 if (eh->elf.root.u.def.value > toc_inf->toc->rawsize)
8815 i = toc_inf->toc->rawsize >> 3;
8816 else
8817 i = eh->elf.root.u.def.value >> 3;
8818
8819 if ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0)
8820 {
8821 _bfd_error_handler
8822 (_("%s defined on removed toc entry"), eh->elf.root.root.string);
8823 do
8824 ++i;
8825 while ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0);
8826 eh->elf.root.u.def.value = (bfd_vma) i << 3;
8827 }
8828
8829 eh->elf.root.u.def.value -= toc_inf->skip[i];
8830 eh->adjust_done = 1;
8831 }
8832 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
8833 toc_inf->global_toc_syms = TRUE;
8834
8835 return TRUE;
8836 }
8837
8838 /* Return TRUE iff INSN with a relocation of R_TYPE is one we expect
8839 on a _LO variety toc/got reloc. */
8840
8841 static bfd_boolean
8842 ok_lo_toc_insn (unsigned int insn, enum elf_ppc64_reloc_type r_type)
8843 {
8844 return ((insn & (0x3f << 26)) == 12u << 26 /* addic */
8845 || (insn & (0x3f << 26)) == 14u << 26 /* addi */
8846 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
8847 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
8848 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
8849 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
8850 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
8851 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
8852 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
8853 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
8854 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
8855 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
8856 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
8857 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
8858 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
8859 || (insn & (0x3f << 26)) == 56u << 26 /* lq,lfq */
8860 || ((insn & (0x3f << 26)) == 57u << 26 /* lxsd,lxssp,lfdp */
8861 /* Exclude lfqu by testing reloc. If relocs are ever
8862 defined for the reduced D field in psq_lu then those
8863 will need testing too. */
8864 && r_type != R_PPC64_TOC16_LO && r_type != R_PPC64_GOT16_LO)
8865 || ((insn & (0x3f << 26)) == 58u << 26 /* ld,lwa */
8866 && (insn & 1) == 0)
8867 || (insn & (0x3f << 26)) == 60u << 26 /* stfq */
8868 || ((insn & (0x3f << 26)) == 61u << 26 /* lxv,stx{v,sd,ssp},stfdp */
8869 /* Exclude stfqu. psq_stu as above for psq_lu. */
8870 && r_type != R_PPC64_TOC16_LO && r_type != R_PPC64_GOT16_LO)
8871 || ((insn & (0x3f << 26)) == 62u << 26 /* std,stq */
8872 && (insn & 1) == 0));
8873 }
8874
8875 /* Examine all relocs referencing .toc sections in order to remove
8876 unused .toc entries. */
8877
8878 bfd_boolean
8879 ppc64_elf_edit_toc (struct bfd_link_info *info)
8880 {
8881 bfd *ibfd;
8882 struct adjust_toc_info toc_inf;
8883 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8884
8885 htab->do_toc_opt = 1;
8886 toc_inf.global_toc_syms = TRUE;
8887 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
8888 {
8889 asection *toc, *sec;
8890 Elf_Internal_Shdr *symtab_hdr;
8891 Elf_Internal_Sym *local_syms;
8892 Elf_Internal_Rela *relstart, *rel, *toc_relocs;
8893 unsigned long *skip, *drop;
8894 unsigned char *used;
8895 unsigned char *keep, last, some_unused;
8896
8897 if (!is_ppc64_elf (ibfd))
8898 continue;
8899
8900 toc = bfd_get_section_by_name (ibfd, ".toc");
8901 if (toc == NULL
8902 || toc->size == 0
8903 || toc->sec_info_type == SEC_INFO_TYPE_JUST_SYMS
8904 || discarded_section (toc))
8905 continue;
8906
8907 toc_relocs = NULL;
8908 local_syms = NULL;
8909 symtab_hdr = &elf_symtab_hdr (ibfd);
8910
8911 /* Look at sections dropped from the final link. */
8912 skip = NULL;
8913 relstart = NULL;
8914 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8915 {
8916 if (sec->reloc_count == 0
8917 || !discarded_section (sec)
8918 || get_opd_info (sec)
8919 || (sec->flags & SEC_ALLOC) == 0
8920 || (sec->flags & SEC_DEBUGGING) != 0)
8921 continue;
8922
8923 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
8924 if (relstart == NULL)
8925 goto error_ret;
8926
8927 /* Run through the relocs to see which toc entries might be
8928 unused. */
8929 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8930 {
8931 enum elf_ppc64_reloc_type r_type;
8932 unsigned long r_symndx;
8933 asection *sym_sec;
8934 struct elf_link_hash_entry *h;
8935 Elf_Internal_Sym *sym;
8936 bfd_vma val;
8937
8938 r_type = ELF64_R_TYPE (rel->r_info);
8939 switch (r_type)
8940 {
8941 default:
8942 continue;
8943
8944 case R_PPC64_TOC16:
8945 case R_PPC64_TOC16_LO:
8946 case R_PPC64_TOC16_HI:
8947 case R_PPC64_TOC16_HA:
8948 case R_PPC64_TOC16_DS:
8949 case R_PPC64_TOC16_LO_DS:
8950 break;
8951 }
8952
8953 r_symndx = ELF64_R_SYM (rel->r_info);
8954 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8955 r_symndx, ibfd))
8956 goto error_ret;
8957
8958 if (sym_sec != toc)
8959 continue;
8960
8961 if (h != NULL)
8962 val = h->root.u.def.value;
8963 else
8964 val = sym->st_value;
8965 val += rel->r_addend;
8966
8967 if (val >= toc->size)
8968 continue;
8969
8970 /* Anything in the toc ought to be aligned to 8 bytes.
8971 If not, don't mark as unused. */
8972 if (val & 7)
8973 continue;
8974
8975 if (skip == NULL)
8976 {
8977 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
8978 if (skip == NULL)
8979 goto error_ret;
8980 }
8981
8982 skip[val >> 3] = ref_from_discarded;
8983 }
8984
8985 if (elf_section_data (sec)->relocs != relstart)
8986 free (relstart);
8987 }
8988
8989 /* For largetoc loads of address constants, we can convert
8990 . addis rx,2,addr@got@ha
8991 . ld ry,addr@got@l(rx)
8992 to
8993 . addis rx,2,addr@toc@ha
8994 . addi ry,rx,addr@toc@l
8995 when addr is within 2G of the toc pointer. This then means
8996 that the word storing "addr" in the toc is no longer needed. */
8997
8998 if (!ppc64_elf_tdata (ibfd)->has_small_toc_reloc
8999 && toc->output_section->rawsize < (bfd_vma) 1 << 31
9000 && toc->reloc_count != 0)
9001 {
9002 /* Read toc relocs. */
9003 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
9004 info->keep_memory);
9005 if (toc_relocs == NULL)
9006 goto error_ret;
9007
9008 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
9009 {
9010 enum elf_ppc64_reloc_type r_type;
9011 unsigned long r_symndx;
9012 asection *sym_sec;
9013 struct elf_link_hash_entry *h;
9014 Elf_Internal_Sym *sym;
9015 bfd_vma val, addr;
9016
9017 r_type = ELF64_R_TYPE (rel->r_info);
9018 if (r_type != R_PPC64_ADDR64)
9019 continue;
9020
9021 r_symndx = ELF64_R_SYM (rel->r_info);
9022 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9023 r_symndx, ibfd))
9024 goto error_ret;
9025
9026 if (sym_sec == NULL
9027 || sym_sec->output_section == NULL
9028 || discarded_section (sym_sec))
9029 continue;
9030
9031 if (!SYMBOL_REFERENCES_LOCAL (info, h))
9032 continue;
9033
9034 if (h != NULL)
9035 {
9036 if (h->type == STT_GNU_IFUNC)
9037 continue;
9038 val = h->root.u.def.value;
9039 }
9040 else
9041 {
9042 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
9043 continue;
9044 val = sym->st_value;
9045 }
9046 val += rel->r_addend;
9047 val += sym_sec->output_section->vma + sym_sec->output_offset;
9048
9049 /* We don't yet know the exact toc pointer value, but we
9050 know it will be somewhere in the toc section. Don't
9051 optimize if the difference from any possible toc
9052 pointer is outside [ff..f80008000, 7fff7fff]. */
9053 addr = toc->output_section->vma + TOC_BASE_OFF;
9054 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
9055 continue;
9056
9057 addr = toc->output_section->vma + toc->output_section->rawsize;
9058 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
9059 continue;
9060
9061 if (skip == NULL)
9062 {
9063 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
9064 if (skip == NULL)
9065 goto error_ret;
9066 }
9067
9068 skip[rel->r_offset >> 3]
9069 |= can_optimize | ((rel - toc_relocs) << 2);
9070 }
9071 }
9072
9073 if (skip == NULL)
9074 continue;
9075
9076 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
9077 if (used == NULL)
9078 {
9079 error_ret:
9080 if (local_syms != NULL
9081 && symtab_hdr->contents != (unsigned char *) local_syms)
9082 free (local_syms);
9083 if (sec != NULL
9084 && relstart != NULL
9085 && elf_section_data (sec)->relocs != relstart)
9086 free (relstart);
9087 if (toc_relocs != NULL
9088 && elf_section_data (toc)->relocs != toc_relocs)
9089 free (toc_relocs);
9090 if (skip != NULL)
9091 free (skip);
9092 return FALSE;
9093 }
9094
9095 /* Now check all kept sections that might reference the toc.
9096 Check the toc itself last. */
9097 for (sec = (ibfd->sections == toc && toc->next ? toc->next
9098 : ibfd->sections);
9099 sec != NULL;
9100 sec = (sec == toc ? NULL
9101 : sec->next == NULL ? toc
9102 : sec->next == toc && toc->next ? toc->next
9103 : sec->next))
9104 {
9105 int repeat;
9106
9107 if (sec->reloc_count == 0
9108 || discarded_section (sec)
9109 || get_opd_info (sec)
9110 || (sec->flags & SEC_ALLOC) == 0
9111 || (sec->flags & SEC_DEBUGGING) != 0)
9112 continue;
9113
9114 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
9115 info->keep_memory);
9116 if (relstart == NULL)
9117 {
9118 free (used);
9119 goto error_ret;
9120 }
9121
9122 /* Mark toc entries referenced as used. */
9123 do
9124 {
9125 repeat = 0;
9126 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
9127 {
9128 enum elf_ppc64_reloc_type r_type;
9129 unsigned long r_symndx;
9130 asection *sym_sec;
9131 struct elf_link_hash_entry *h;
9132 Elf_Internal_Sym *sym;
9133 bfd_vma val;
9134 enum {no_check, check_lo, check_ha} insn_check;
9135
9136 r_type = ELF64_R_TYPE (rel->r_info);
9137 switch (r_type)
9138 {
9139 default:
9140 insn_check = no_check;
9141 break;
9142
9143 case R_PPC64_GOT_TLSLD16_HA:
9144 case R_PPC64_GOT_TLSGD16_HA:
9145 case R_PPC64_GOT_TPREL16_HA:
9146 case R_PPC64_GOT_DTPREL16_HA:
9147 case R_PPC64_GOT16_HA:
9148 case R_PPC64_TOC16_HA:
9149 insn_check = check_ha;
9150 break;
9151
9152 case R_PPC64_GOT_TLSLD16_LO:
9153 case R_PPC64_GOT_TLSGD16_LO:
9154 case R_PPC64_GOT_TPREL16_LO_DS:
9155 case R_PPC64_GOT_DTPREL16_LO_DS:
9156 case R_PPC64_GOT16_LO:
9157 case R_PPC64_GOT16_LO_DS:
9158 case R_PPC64_TOC16_LO:
9159 case R_PPC64_TOC16_LO_DS:
9160 insn_check = check_lo;
9161 break;
9162 }
9163
9164 if (insn_check != no_check)
9165 {
9166 bfd_vma off = rel->r_offset & ~3;
9167 unsigned char buf[4];
9168 unsigned int insn;
9169
9170 if (!bfd_get_section_contents (ibfd, sec, buf, off, 4))
9171 {
9172 free (used);
9173 goto error_ret;
9174 }
9175 insn = bfd_get_32 (ibfd, buf);
9176 if (insn_check == check_lo
9177 ? !ok_lo_toc_insn (insn, r_type)
9178 : ((insn & ((0x3f << 26) | 0x1f << 16))
9179 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */))
9180 {
9181 char str[12];
9182
9183 ppc64_elf_tdata (ibfd)->unexpected_toc_insn = 1;
9184 sprintf (str, "%#08x", insn);
9185 info->callbacks->einfo
9186 /* xgettext:c-format */
9187 (_("%H: toc optimization is not supported for"
9188 " %s instruction.\n"),
9189 ibfd, sec, rel->r_offset & ~3, str);
9190 }
9191 }
9192
9193 switch (r_type)
9194 {
9195 case R_PPC64_TOC16:
9196 case R_PPC64_TOC16_LO:
9197 case R_PPC64_TOC16_HI:
9198 case R_PPC64_TOC16_HA:
9199 case R_PPC64_TOC16_DS:
9200 case R_PPC64_TOC16_LO_DS:
9201 /* In case we're taking addresses of toc entries. */
9202 case R_PPC64_ADDR64:
9203 break;
9204
9205 default:
9206 continue;
9207 }
9208
9209 r_symndx = ELF64_R_SYM (rel->r_info);
9210 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9211 r_symndx, ibfd))
9212 {
9213 free (used);
9214 goto error_ret;
9215 }
9216
9217 if (sym_sec != toc)
9218 continue;
9219
9220 if (h != NULL)
9221 val = h->root.u.def.value;
9222 else
9223 val = sym->st_value;
9224 val += rel->r_addend;
9225
9226 if (val >= toc->size)
9227 continue;
9228
9229 if ((skip[val >> 3] & can_optimize) != 0)
9230 {
9231 bfd_vma off;
9232 unsigned char opc;
9233
9234 switch (r_type)
9235 {
9236 case R_PPC64_TOC16_HA:
9237 break;
9238
9239 case R_PPC64_TOC16_LO_DS:
9240 off = rel->r_offset;
9241 off += (bfd_big_endian (ibfd) ? -2 : 3);
9242 if (!bfd_get_section_contents (ibfd, sec, &opc,
9243 off, 1))
9244 {
9245 free (used);
9246 goto error_ret;
9247 }
9248 if ((opc & (0x3f << 2)) == (58u << 2))
9249 break;
9250 /* Fall through. */
9251
9252 default:
9253 /* Wrong sort of reloc, or not a ld. We may
9254 as well clear ref_from_discarded too. */
9255 skip[val >> 3] = 0;
9256 }
9257 }
9258
9259 if (sec != toc)
9260 used[val >> 3] = 1;
9261 /* For the toc section, we only mark as used if this
9262 entry itself isn't unused. */
9263 else if ((used[rel->r_offset >> 3]
9264 || !(skip[rel->r_offset >> 3] & ref_from_discarded))
9265 && !used[val >> 3])
9266 {
9267 /* Do all the relocs again, to catch reference
9268 chains. */
9269 repeat = 1;
9270 used[val >> 3] = 1;
9271 }
9272 }
9273 }
9274 while (repeat);
9275
9276 if (elf_section_data (sec)->relocs != relstart)
9277 free (relstart);
9278 }
9279
9280 /* Merge the used and skip arrays. Assume that TOC
9281 doublewords not appearing as either used or unused belong
9282 to an entry more than one doubleword in size. */
9283 for (drop = skip, keep = used, last = 0, some_unused = 0;
9284 drop < skip + (toc->size + 7) / 8;
9285 ++drop, ++keep)
9286 {
9287 if (*keep)
9288 {
9289 *drop &= ~ref_from_discarded;
9290 if ((*drop & can_optimize) != 0)
9291 some_unused = 1;
9292 last = 0;
9293 }
9294 else if ((*drop & ref_from_discarded) != 0)
9295 {
9296 some_unused = 1;
9297 last = ref_from_discarded;
9298 }
9299 else
9300 *drop = last;
9301 }
9302
9303 free (used);
9304
9305 if (some_unused)
9306 {
9307 bfd_byte *contents, *src;
9308 unsigned long off;
9309 Elf_Internal_Sym *sym;
9310 bfd_boolean local_toc_syms = FALSE;
9311
9312 /* Shuffle the toc contents, and at the same time convert the
9313 skip array from booleans into offsets. */
9314 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
9315 goto error_ret;
9316
9317 elf_section_data (toc)->this_hdr.contents = contents;
9318
9319 for (src = contents, off = 0, drop = skip;
9320 src < contents + toc->size;
9321 src += 8, ++drop)
9322 {
9323 if ((*drop & (can_optimize | ref_from_discarded)) != 0)
9324 off += 8;
9325 else if (off != 0)
9326 {
9327 *drop = off;
9328 memcpy (src - off, src, 8);
9329 }
9330 }
9331 *drop = off;
9332 toc->rawsize = toc->size;
9333 toc->size = src - contents - off;
9334
9335 /* Adjust addends for relocs against the toc section sym,
9336 and optimize any accesses we can. */
9337 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
9338 {
9339 if (sec->reloc_count == 0
9340 || discarded_section (sec))
9341 continue;
9342
9343 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
9344 info->keep_memory);
9345 if (relstart == NULL)
9346 goto error_ret;
9347
9348 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
9349 {
9350 enum elf_ppc64_reloc_type r_type;
9351 unsigned long r_symndx;
9352 asection *sym_sec;
9353 struct elf_link_hash_entry *h;
9354 bfd_vma val;
9355
9356 r_type = ELF64_R_TYPE (rel->r_info);
9357 switch (r_type)
9358 {
9359 default:
9360 continue;
9361
9362 case R_PPC64_TOC16:
9363 case R_PPC64_TOC16_LO:
9364 case R_PPC64_TOC16_HI:
9365 case R_PPC64_TOC16_HA:
9366 case R_PPC64_TOC16_DS:
9367 case R_PPC64_TOC16_LO_DS:
9368 case R_PPC64_ADDR64:
9369 break;
9370 }
9371
9372 r_symndx = ELF64_R_SYM (rel->r_info);
9373 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9374 r_symndx, ibfd))
9375 goto error_ret;
9376
9377 if (sym_sec != toc)
9378 continue;
9379
9380 if (h != NULL)
9381 val = h->root.u.def.value;
9382 else
9383 {
9384 val = sym->st_value;
9385 if (val != 0)
9386 local_toc_syms = TRUE;
9387 }
9388
9389 val += rel->r_addend;
9390
9391 if (val > toc->rawsize)
9392 val = toc->rawsize;
9393 else if ((skip[val >> 3] & ref_from_discarded) != 0)
9394 continue;
9395 else if ((skip[val >> 3] & can_optimize) != 0)
9396 {
9397 Elf_Internal_Rela *tocrel
9398 = toc_relocs + (skip[val >> 3] >> 2);
9399 unsigned long tsym = ELF64_R_SYM (tocrel->r_info);
9400
9401 switch (r_type)
9402 {
9403 case R_PPC64_TOC16_HA:
9404 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_TOC16_HA);
9405 break;
9406
9407 case R_PPC64_TOC16_LO_DS:
9408 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_LO_DS_OPT);
9409 break;
9410
9411 default:
9412 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
9413 ppc_howto_init ();
9414 info->callbacks->einfo
9415 /* xgettext:c-format */
9416 (_("%H: %s references "
9417 "optimized away TOC entry\n"),
9418 ibfd, sec, rel->r_offset,
9419 ppc64_elf_howto_table[r_type]->name);
9420 bfd_set_error (bfd_error_bad_value);
9421 goto error_ret;
9422 }
9423 rel->r_addend = tocrel->r_addend;
9424 elf_section_data (sec)->relocs = relstart;
9425 continue;
9426 }
9427
9428 if (h != NULL || sym->st_value != 0)
9429 continue;
9430
9431 rel->r_addend -= skip[val >> 3];
9432 elf_section_data (sec)->relocs = relstart;
9433 }
9434
9435 if (elf_section_data (sec)->relocs != relstart)
9436 free (relstart);
9437 }
9438
9439 /* We shouldn't have local or global symbols defined in the TOC,
9440 but handle them anyway. */
9441 if (local_syms != NULL)
9442 for (sym = local_syms;
9443 sym < local_syms + symtab_hdr->sh_info;
9444 ++sym)
9445 if (sym->st_value != 0
9446 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
9447 {
9448 unsigned long i;
9449
9450 if (sym->st_value > toc->rawsize)
9451 i = toc->rawsize >> 3;
9452 else
9453 i = sym->st_value >> 3;
9454
9455 if ((skip[i] & (ref_from_discarded | can_optimize)) != 0)
9456 {
9457 if (local_toc_syms)
9458 _bfd_error_handler
9459 (_("%s defined on removed toc entry"),
9460 bfd_elf_sym_name (ibfd, symtab_hdr, sym, NULL));
9461 do
9462 ++i;
9463 while ((skip[i] & (ref_from_discarded | can_optimize)));
9464 sym->st_value = (bfd_vma) i << 3;
9465 }
9466
9467 sym->st_value -= skip[i];
9468 symtab_hdr->contents = (unsigned char *) local_syms;
9469 }
9470
9471 /* Adjust any global syms defined in this toc input section. */
9472 if (toc_inf.global_toc_syms)
9473 {
9474 toc_inf.toc = toc;
9475 toc_inf.skip = skip;
9476 toc_inf.global_toc_syms = FALSE;
9477 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
9478 &toc_inf);
9479 }
9480
9481 if (toc->reloc_count != 0)
9482 {
9483 Elf_Internal_Shdr *rel_hdr;
9484 Elf_Internal_Rela *wrel;
9485 bfd_size_type sz;
9486
9487 /* Remove unused toc relocs, and adjust those we keep. */
9488 if (toc_relocs == NULL)
9489 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
9490 info->keep_memory);
9491 if (toc_relocs == NULL)
9492 goto error_ret;
9493
9494 wrel = toc_relocs;
9495 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
9496 if ((skip[rel->r_offset >> 3]
9497 & (ref_from_discarded | can_optimize)) == 0)
9498 {
9499 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
9500 wrel->r_info = rel->r_info;
9501 wrel->r_addend = rel->r_addend;
9502 ++wrel;
9503 }
9504 else if (!dec_dynrel_count (rel->r_info, toc, info,
9505 &local_syms, NULL, NULL))
9506 goto error_ret;
9507
9508 elf_section_data (toc)->relocs = toc_relocs;
9509 toc->reloc_count = wrel - toc_relocs;
9510 rel_hdr = _bfd_elf_single_rel_hdr (toc);
9511 sz = rel_hdr->sh_entsize;
9512 rel_hdr->sh_size = toc->reloc_count * sz;
9513 }
9514 }
9515 else if (toc_relocs != NULL
9516 && elf_section_data (toc)->relocs != toc_relocs)
9517 free (toc_relocs);
9518
9519 if (local_syms != NULL
9520 && symtab_hdr->contents != (unsigned char *) local_syms)
9521 {
9522 if (!info->keep_memory)
9523 free (local_syms);
9524 else
9525 symtab_hdr->contents = (unsigned char *) local_syms;
9526 }
9527 free (skip);
9528 }
9529
9530 return TRUE;
9531 }
9532
9533 /* Return true iff input section I references the TOC using
9534 instructions limited to +/-32k offsets. */
9535
9536 bfd_boolean
9537 ppc64_elf_has_small_toc_reloc (asection *i)
9538 {
9539 return (is_ppc64_elf (i->owner)
9540 && ppc64_elf_tdata (i->owner)->has_small_toc_reloc);
9541 }
9542
9543 /* Allocate space for one GOT entry. */
9544
9545 static void
9546 allocate_got (struct elf_link_hash_entry *h,
9547 struct bfd_link_info *info,
9548 struct got_entry *gent)
9549 {
9550 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9551 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
9552 int entsize = (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)
9553 ? 16 : 8);
9554 int rentsize = (gent->tls_type & eh->tls_mask & TLS_GD
9555 ? 2 : 1) * sizeof (Elf64_External_Rela);
9556 asection *got = ppc64_elf_tdata (gent->owner)->got;
9557
9558 gent->got.offset = got->size;
9559 got->size += entsize;
9560
9561 if (h->type == STT_GNU_IFUNC)
9562 {
9563 htab->elf.irelplt->size += rentsize;
9564 htab->got_reli_size += rentsize;
9565 }
9566 else if ((bfd_link_pic (info)
9567 || (htab->elf.dynamic_sections_created
9568 && h->dynindx != -1
9569 && !SYMBOL_REFERENCES_LOCAL (info, h)))
9570 && !UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
9571 {
9572 asection *relgot = ppc64_elf_tdata (gent->owner)->relgot;
9573 relgot->size += rentsize;
9574 }
9575 }
9576
9577 /* This function merges got entries in the same toc group. */
9578
9579 static void
9580 merge_got_entries (struct got_entry **pent)
9581 {
9582 struct got_entry *ent, *ent2;
9583
9584 for (ent = *pent; ent != NULL; ent = ent->next)
9585 if (!ent->is_indirect)
9586 for (ent2 = ent->next; ent2 != NULL; ent2 = ent2->next)
9587 if (!ent2->is_indirect
9588 && ent2->addend == ent->addend
9589 && ent2->tls_type == ent->tls_type
9590 && elf_gp (ent2->owner) == elf_gp (ent->owner))
9591 {
9592 ent2->is_indirect = TRUE;
9593 ent2->got.ent = ent;
9594 }
9595 }
9596
9597 /* If H is undefined, make it dynamic if that makes sense. */
9598
9599 static bfd_boolean
9600 ensure_undef_dynamic (struct bfd_link_info *info,
9601 struct elf_link_hash_entry *h)
9602 {
9603 struct elf_link_hash_table *htab = elf_hash_table (info);
9604
9605 if (htab->dynamic_sections_created
9606 && ((info->dynamic_undefined_weak != 0
9607 && h->root.type == bfd_link_hash_undefweak)
9608 || h->root.type == bfd_link_hash_undefined)
9609 && h->dynindx == -1
9610 && !h->forced_local
9611 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
9612 return bfd_elf_link_record_dynamic_symbol (info, h);
9613 return TRUE;
9614 }
9615
9616 /* Allocate space in .plt, .got and associated reloc sections for
9617 dynamic relocs. */
9618
9619 static bfd_boolean
9620 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
9621 {
9622 struct bfd_link_info *info;
9623 struct ppc_link_hash_table *htab;
9624 asection *s;
9625 struct ppc_link_hash_entry *eh;
9626 struct got_entry **pgent, *gent;
9627
9628 if (h->root.type == bfd_link_hash_indirect)
9629 return TRUE;
9630
9631 info = (struct bfd_link_info *) inf;
9632 htab = ppc_hash_table (info);
9633 if (htab == NULL)
9634 return FALSE;
9635
9636 eh = (struct ppc_link_hash_entry *) h;
9637 /* Run through the TLS GD got entries first if we're changing them
9638 to TPREL. */
9639 if ((eh->tls_mask & TLS_TPRELGD) != 0)
9640 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9641 if (gent->got.refcount > 0
9642 && (gent->tls_type & TLS_GD) != 0)
9643 {
9644 /* This was a GD entry that has been converted to TPREL. If
9645 there happens to be a TPREL entry we can use that one. */
9646 struct got_entry *ent;
9647 for (ent = h->got.glist; ent != NULL; ent = ent->next)
9648 if (ent->got.refcount > 0
9649 && (ent->tls_type & TLS_TPREL) != 0
9650 && ent->addend == gent->addend
9651 && ent->owner == gent->owner)
9652 {
9653 gent->got.refcount = 0;
9654 break;
9655 }
9656
9657 /* If not, then we'll be using our own TPREL entry. */
9658 if (gent->got.refcount != 0)
9659 gent->tls_type = TLS_TLS | TLS_TPREL;
9660 }
9661
9662 /* Remove any list entry that won't generate a word in the GOT before
9663 we call merge_got_entries. Otherwise we risk merging to empty
9664 entries. */
9665 pgent = &h->got.glist;
9666 while ((gent = *pgent) != NULL)
9667 if (gent->got.refcount > 0)
9668 {
9669 if ((gent->tls_type & TLS_LD) != 0
9670 && !h->def_dynamic)
9671 {
9672 ppc64_tlsld_got (gent->owner)->got.refcount += 1;
9673 *pgent = gent->next;
9674 }
9675 else
9676 pgent = &gent->next;
9677 }
9678 else
9679 *pgent = gent->next;
9680
9681 if (!htab->do_multi_toc)
9682 merge_got_entries (&h->got.glist);
9683
9684 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9685 if (!gent->is_indirect)
9686 {
9687 /* Make sure this symbol is output as a dynamic symbol. */
9688 if (!ensure_undef_dynamic (info, h))
9689 return FALSE;
9690
9691 if (!is_ppc64_elf (gent->owner))
9692 abort ();
9693
9694 allocate_got (h, info, gent);
9695 }
9696
9697 /* If no dynamic sections we can't have dynamic relocs, except for
9698 IFUNCs which are handled even in static executables. */
9699 if (!htab->elf.dynamic_sections_created
9700 && h->type != STT_GNU_IFUNC)
9701 eh->dyn_relocs = NULL;
9702
9703 /* Also discard relocs on undefined weak syms with non-default
9704 visibility, or when dynamic_undefined_weak says so. */
9705 else if (UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
9706 eh->dyn_relocs = NULL;
9707
9708 if (eh->dyn_relocs != NULL)
9709 {
9710 struct elf_dyn_relocs *p, **pp;
9711
9712 /* In the shared -Bsymbolic case, discard space allocated for
9713 dynamic pc-relative relocs against symbols which turn out to
9714 be defined in regular objects. For the normal shared case,
9715 discard space for relocs that have become local due to symbol
9716 visibility changes. */
9717
9718 if (bfd_link_pic (info))
9719 {
9720 /* Relocs that use pc_count are those that appear on a call
9721 insn, or certain REL relocs (see must_be_dyn_reloc) that
9722 can be generated via assembly. We want calls to
9723 protected symbols to resolve directly to the function
9724 rather than going via the plt. If people want function
9725 pointer comparisons to work as expected then they should
9726 avoid writing weird assembly. */
9727 if (SYMBOL_CALLS_LOCAL (info, h))
9728 {
9729 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
9730 {
9731 p->count -= p->pc_count;
9732 p->pc_count = 0;
9733 if (p->count == 0)
9734 *pp = p->next;
9735 else
9736 pp = &p->next;
9737 }
9738 }
9739
9740 if (eh->dyn_relocs != NULL)
9741 {
9742 /* Make sure this symbol is output as a dynamic symbol. */
9743 if (!ensure_undef_dynamic (info, h))
9744 return FALSE;
9745 }
9746 }
9747 else if (h->type == STT_GNU_IFUNC)
9748 {
9749 /* A plt entry is always created when making direct calls to
9750 an ifunc, even when building a static executable, but
9751 that doesn't cover all cases. We may have only an ifunc
9752 initialised function pointer for a given ifunc symbol.
9753
9754 For ELFv2, dynamic relocations are not required when
9755 generating a global entry PLT stub. */
9756 if (abiversion (info->output_bfd) >= 2)
9757 {
9758 if (global_entry_stub (h))
9759 eh->dyn_relocs = NULL;
9760 }
9761
9762 /* For ELFv1 we have function descriptors. Descriptors need
9763 to be treated like PLT entries and thus have dynamic
9764 relocations. One exception is when the function
9765 descriptor is copied into .dynbss (which should only
9766 happen with ancient versions of gcc). */
9767 else if (h->needs_copy)
9768 eh->dyn_relocs = NULL;
9769 }
9770 else if (ELIMINATE_COPY_RELOCS)
9771 {
9772 /* For the non-pic case, discard space for relocs against
9773 symbols which turn out to need copy relocs or are not
9774 dynamic. */
9775 if (!h->non_got_ref
9776 && !h->def_regular)
9777 {
9778 /* Make sure this symbol is output as a dynamic symbol. */
9779 if (!ensure_undef_dynamic (info, h))
9780 return FALSE;
9781
9782 if (h->dynindx == -1)
9783 eh->dyn_relocs = NULL;
9784 }
9785 else
9786 eh->dyn_relocs = NULL;
9787 }
9788
9789 /* Finally, allocate space. */
9790 for (p = eh->dyn_relocs; p != NULL; p = p->next)
9791 {
9792 asection *sreloc = elf_section_data (p->sec)->sreloc;
9793 if (eh->elf.type == STT_GNU_IFUNC)
9794 sreloc = htab->elf.irelplt;
9795 sreloc->size += p->count * sizeof (Elf64_External_Rela);
9796 }
9797 }
9798
9799 if ((htab->elf.dynamic_sections_created
9800 && h->dynindx != -1)
9801 || h->type == STT_GNU_IFUNC)
9802 {
9803 struct plt_entry *pent;
9804 bfd_boolean doneone = FALSE;
9805 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
9806 if (pent->plt.refcount > 0)
9807 {
9808 if (!htab->elf.dynamic_sections_created
9809 || h->dynindx == -1)
9810 {
9811 s = htab->elf.iplt;
9812 pent->plt.offset = s->size;
9813 s->size += PLT_ENTRY_SIZE (htab);
9814 s = htab->elf.irelplt;
9815 }
9816 else
9817 {
9818 /* If this is the first .plt entry, make room for the special
9819 first entry. */
9820 s = htab->elf.splt;
9821 if (s->size == 0)
9822 s->size += PLT_INITIAL_ENTRY_SIZE (htab);
9823
9824 pent->plt.offset = s->size;
9825
9826 /* Make room for this entry. */
9827 s->size += PLT_ENTRY_SIZE (htab);
9828
9829 /* Make room for the .glink code. */
9830 s = htab->glink;
9831 if (s->size == 0)
9832 s->size += GLINK_CALL_STUB_SIZE;
9833 if (htab->opd_abi)
9834 {
9835 /* We need bigger stubs past index 32767. */
9836 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
9837 s->size += 4;
9838 s->size += 2*4;
9839 }
9840 else
9841 s->size += 4;
9842
9843 /* We also need to make an entry in the .rela.plt section. */
9844 s = htab->elf.srelplt;
9845 }
9846 s->size += sizeof (Elf64_External_Rela);
9847 doneone = TRUE;
9848 }
9849 else
9850 pent->plt.offset = (bfd_vma) -1;
9851 if (!doneone)
9852 {
9853 h->plt.plist = NULL;
9854 h->needs_plt = 0;
9855 }
9856 }
9857 else
9858 {
9859 h->plt.plist = NULL;
9860 h->needs_plt = 0;
9861 }
9862
9863 return TRUE;
9864 }
9865
9866 /* Called via elf_link_hash_traverse from ppc64_elf_size_dynamic_sections
9867 to set up space for global entry stubs. These are put in glink,
9868 after the branch table. */
9869
9870 static bfd_boolean
9871 size_global_entry_stubs (struct elf_link_hash_entry *h, void *inf)
9872 {
9873 struct bfd_link_info *info;
9874 struct ppc_link_hash_table *htab;
9875 struct plt_entry *pent;
9876 asection *s;
9877
9878 if (h->root.type == bfd_link_hash_indirect)
9879 return TRUE;
9880
9881 if (!h->pointer_equality_needed)
9882 return TRUE;
9883
9884 if (h->def_regular)
9885 return TRUE;
9886
9887 info = inf;
9888 htab = ppc_hash_table (info);
9889 if (htab == NULL)
9890 return FALSE;
9891
9892 s = htab->glink;
9893 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
9894 if (pent->plt.offset != (bfd_vma) -1
9895 && pent->addend == 0)
9896 {
9897 /* For ELFv2, if this symbol is not defined in a regular file
9898 and we are not generating a shared library or pie, then we
9899 need to define the symbol in the executable on a call stub.
9900 This is to avoid text relocations. */
9901 s->size = (s->size + 15) & -16;
9902 h->root.type = bfd_link_hash_defined;
9903 h->root.u.def.section = s;
9904 h->root.u.def.value = s->size;
9905 s->size += 16;
9906 break;
9907 }
9908 return TRUE;
9909 }
9910
9911 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
9912 read-only sections. */
9913
9914 static bfd_boolean
9915 maybe_set_textrel (struct elf_link_hash_entry *h, void *info)
9916 {
9917 if (h->root.type == bfd_link_hash_indirect)
9918 return TRUE;
9919
9920 if (readonly_dynrelocs (h))
9921 {
9922 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
9923
9924 /* Not an error, just cut short the traversal. */
9925 return FALSE;
9926 }
9927 return TRUE;
9928 }
9929
9930 /* Set the sizes of the dynamic sections. */
9931
9932 static bfd_boolean
9933 ppc64_elf_size_dynamic_sections (bfd *output_bfd,
9934 struct bfd_link_info *info)
9935 {
9936 struct ppc_link_hash_table *htab;
9937 bfd *dynobj;
9938 asection *s;
9939 bfd_boolean relocs;
9940 bfd *ibfd;
9941 struct got_entry *first_tlsld;
9942
9943 htab = ppc_hash_table (info);
9944 if (htab == NULL)
9945 return FALSE;
9946
9947 dynobj = htab->elf.dynobj;
9948 if (dynobj == NULL)
9949 abort ();
9950
9951 if (htab->elf.dynamic_sections_created)
9952 {
9953 /* Set the contents of the .interp section to the interpreter. */
9954 if (bfd_link_executable (info) && !info->nointerp)
9955 {
9956 s = bfd_get_linker_section (dynobj, ".interp");
9957 if (s == NULL)
9958 abort ();
9959 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
9960 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
9961 }
9962 }
9963
9964 /* Set up .got offsets for local syms, and space for local dynamic
9965 relocs. */
9966 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
9967 {
9968 struct got_entry **lgot_ents;
9969 struct got_entry **end_lgot_ents;
9970 struct plt_entry **local_plt;
9971 struct plt_entry **end_local_plt;
9972 unsigned char *lgot_masks;
9973 bfd_size_type locsymcount;
9974 Elf_Internal_Shdr *symtab_hdr;
9975
9976 if (!is_ppc64_elf (ibfd))
9977 continue;
9978
9979 for (s = ibfd->sections; s != NULL; s = s->next)
9980 {
9981 struct ppc_dyn_relocs *p;
9982
9983 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
9984 {
9985 if (!bfd_is_abs_section (p->sec)
9986 && bfd_is_abs_section (p->sec->output_section))
9987 {
9988 /* Input section has been discarded, either because
9989 it is a copy of a linkonce section or due to
9990 linker script /DISCARD/, so we'll be discarding
9991 the relocs too. */
9992 }
9993 else if (p->count != 0)
9994 {
9995 asection *srel = elf_section_data (p->sec)->sreloc;
9996 if (p->ifunc)
9997 srel = htab->elf.irelplt;
9998 srel->size += p->count * sizeof (Elf64_External_Rela);
9999 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
10000 info->flags |= DF_TEXTREL;
10001 }
10002 }
10003 }
10004
10005 lgot_ents = elf_local_got_ents (ibfd);
10006 if (!lgot_ents)
10007 continue;
10008
10009 symtab_hdr = &elf_symtab_hdr (ibfd);
10010 locsymcount = symtab_hdr->sh_info;
10011 end_lgot_ents = lgot_ents + locsymcount;
10012 local_plt = (struct plt_entry **) end_lgot_ents;
10013 end_local_plt = local_plt + locsymcount;
10014 lgot_masks = (unsigned char *) end_local_plt;
10015 s = ppc64_elf_tdata (ibfd)->got;
10016 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
10017 {
10018 struct got_entry **pent, *ent;
10019
10020 pent = lgot_ents;
10021 while ((ent = *pent) != NULL)
10022 if (ent->got.refcount > 0)
10023 {
10024 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
10025 {
10026 ppc64_tlsld_got (ibfd)->got.refcount += 1;
10027 *pent = ent->next;
10028 }
10029 else
10030 {
10031 unsigned int ent_size = 8;
10032 unsigned int rel_size = sizeof (Elf64_External_Rela);
10033
10034 ent->got.offset = s->size;
10035 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
10036 {
10037 ent_size *= 2;
10038 rel_size *= 2;
10039 }
10040 s->size += ent_size;
10041 if ((*lgot_masks & PLT_IFUNC) != 0)
10042 {
10043 htab->elf.irelplt->size += rel_size;
10044 htab->got_reli_size += rel_size;
10045 }
10046 else if (bfd_link_pic (info))
10047 {
10048 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
10049 srel->size += rel_size;
10050 }
10051 pent = &ent->next;
10052 }
10053 }
10054 else
10055 *pent = ent->next;
10056 }
10057
10058 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
10059 for (; local_plt < end_local_plt; ++local_plt)
10060 {
10061 struct plt_entry *ent;
10062
10063 for (ent = *local_plt; ent != NULL; ent = ent->next)
10064 if (ent->plt.refcount > 0)
10065 {
10066 s = htab->elf.iplt;
10067 ent->plt.offset = s->size;
10068 s->size += PLT_ENTRY_SIZE (htab);
10069
10070 htab->elf.irelplt->size += sizeof (Elf64_External_Rela);
10071 }
10072 else
10073 ent->plt.offset = (bfd_vma) -1;
10074 }
10075 }
10076
10077 /* Allocate global sym .plt and .got entries, and space for global
10078 sym dynamic relocs. */
10079 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
10080 /* Stash the end of glink branch table. */
10081 if (htab->glink != NULL)
10082 htab->glink->rawsize = htab->glink->size;
10083
10084 if (!htab->opd_abi && !bfd_link_pic (info))
10085 elf_link_hash_traverse (&htab->elf, size_global_entry_stubs, info);
10086
10087 first_tlsld = NULL;
10088 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
10089 {
10090 struct got_entry *ent;
10091
10092 if (!is_ppc64_elf (ibfd))
10093 continue;
10094
10095 ent = ppc64_tlsld_got (ibfd);
10096 if (ent->got.refcount > 0)
10097 {
10098 if (!htab->do_multi_toc && first_tlsld != NULL)
10099 {
10100 ent->is_indirect = TRUE;
10101 ent->got.ent = first_tlsld;
10102 }
10103 else
10104 {
10105 if (first_tlsld == NULL)
10106 first_tlsld = ent;
10107 s = ppc64_elf_tdata (ibfd)->got;
10108 ent->got.offset = s->size;
10109 ent->owner = ibfd;
10110 s->size += 16;
10111 if (bfd_link_pic (info))
10112 {
10113 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
10114 srel->size += sizeof (Elf64_External_Rela);
10115 }
10116 }
10117 }
10118 else
10119 ent->got.offset = (bfd_vma) -1;
10120 }
10121
10122 /* We now have determined the sizes of the various dynamic sections.
10123 Allocate memory for them. */
10124 relocs = FALSE;
10125 for (s = dynobj->sections; s != NULL; s = s->next)
10126 {
10127 if ((s->flags & SEC_LINKER_CREATED) == 0)
10128 continue;
10129
10130 if (s == htab->brlt || s == htab->relbrlt)
10131 /* These haven't been allocated yet; don't strip. */
10132 continue;
10133 else if (s == htab->elf.sgot
10134 || s == htab->elf.splt
10135 || s == htab->elf.iplt
10136 || s == htab->glink
10137 || s == htab->elf.sdynbss
10138 || s == htab->elf.sdynrelro)
10139 {
10140 /* Strip this section if we don't need it; see the
10141 comment below. */
10142 }
10143 else if (s == htab->glink_eh_frame)
10144 {
10145 if (!bfd_is_abs_section (s->output_section))
10146 /* Not sized yet. */
10147 continue;
10148 }
10149 else if (CONST_STRNEQ (s->name, ".rela"))
10150 {
10151 if (s->size != 0)
10152 {
10153 if (s != htab->elf.srelplt)
10154 relocs = TRUE;
10155
10156 /* We use the reloc_count field as a counter if we need
10157 to copy relocs into the output file. */
10158 s->reloc_count = 0;
10159 }
10160 }
10161 else
10162 {
10163 /* It's not one of our sections, so don't allocate space. */
10164 continue;
10165 }
10166
10167 if (s->size == 0)
10168 {
10169 /* If we don't need this section, strip it from the
10170 output file. This is mostly to handle .rela.bss and
10171 .rela.plt. We must create both sections in
10172 create_dynamic_sections, because they must be created
10173 before the linker maps input sections to output
10174 sections. The linker does that before
10175 adjust_dynamic_symbol is called, and it is that
10176 function which decides whether anything needs to go
10177 into these sections. */
10178 s->flags |= SEC_EXCLUDE;
10179 continue;
10180 }
10181
10182 if ((s->flags & SEC_HAS_CONTENTS) == 0)
10183 continue;
10184
10185 /* Allocate memory for the section contents. We use bfd_zalloc
10186 here in case unused entries are not reclaimed before the
10187 section's contents are written out. This should not happen,
10188 but this way if it does we get a R_PPC64_NONE reloc in .rela
10189 sections instead of garbage.
10190 We also rely on the section contents being zero when writing
10191 the GOT and .dynrelro. */
10192 s->contents = bfd_zalloc (dynobj, s->size);
10193 if (s->contents == NULL)
10194 return FALSE;
10195 }
10196
10197 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
10198 {
10199 if (!is_ppc64_elf (ibfd))
10200 continue;
10201
10202 s = ppc64_elf_tdata (ibfd)->got;
10203 if (s != NULL && s != htab->elf.sgot)
10204 {
10205 if (s->size == 0)
10206 s->flags |= SEC_EXCLUDE;
10207 else
10208 {
10209 s->contents = bfd_zalloc (ibfd, s->size);
10210 if (s->contents == NULL)
10211 return FALSE;
10212 }
10213 }
10214 s = ppc64_elf_tdata (ibfd)->relgot;
10215 if (s != NULL)
10216 {
10217 if (s->size == 0)
10218 s->flags |= SEC_EXCLUDE;
10219 else
10220 {
10221 s->contents = bfd_zalloc (ibfd, s->size);
10222 if (s->contents == NULL)
10223 return FALSE;
10224 relocs = TRUE;
10225 s->reloc_count = 0;
10226 }
10227 }
10228 }
10229
10230 if (htab->elf.dynamic_sections_created)
10231 {
10232 bfd_boolean tls_opt;
10233
10234 /* Add some entries to the .dynamic section. We fill in the
10235 values later, in ppc64_elf_finish_dynamic_sections, but we
10236 must add the entries now so that we get the correct size for
10237 the .dynamic section. The DT_DEBUG entry is filled in by the
10238 dynamic linker and used by the debugger. */
10239 #define add_dynamic_entry(TAG, VAL) \
10240 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
10241
10242 if (bfd_link_executable (info))
10243 {
10244 if (!add_dynamic_entry (DT_DEBUG, 0))
10245 return FALSE;
10246 }
10247
10248 if (htab->elf.splt != NULL && htab->elf.splt->size != 0)
10249 {
10250 if (!add_dynamic_entry (DT_PLTGOT, 0)
10251 || !add_dynamic_entry (DT_PLTRELSZ, 0)
10252 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
10253 || !add_dynamic_entry (DT_JMPREL, 0)
10254 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
10255 return FALSE;
10256 }
10257
10258 if (NO_OPD_RELOCS && abiversion (output_bfd) <= 1)
10259 {
10260 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
10261 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
10262 return FALSE;
10263 }
10264
10265 tls_opt = (htab->params->tls_get_addr_opt
10266 && htab->tls_get_addr_fd != NULL
10267 && htab->tls_get_addr_fd->elf.plt.plist != NULL);
10268 if (tls_opt || !htab->opd_abi)
10269 {
10270 if (!add_dynamic_entry (DT_PPC64_OPT, tls_opt ? PPC64_OPT_TLS : 0))
10271 return FALSE;
10272 }
10273
10274 if (relocs)
10275 {
10276 if (!add_dynamic_entry (DT_RELA, 0)
10277 || !add_dynamic_entry (DT_RELASZ, 0)
10278 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
10279 return FALSE;
10280
10281 /* If any dynamic relocs apply to a read-only section,
10282 then we need a DT_TEXTREL entry. */
10283 if ((info->flags & DF_TEXTREL) == 0)
10284 elf_link_hash_traverse (&htab->elf, maybe_set_textrel, info);
10285
10286 if ((info->flags & DF_TEXTREL) != 0)
10287 {
10288 if (!add_dynamic_entry (DT_TEXTREL, 0))
10289 return FALSE;
10290 }
10291 }
10292 }
10293 #undef add_dynamic_entry
10294
10295 return TRUE;
10296 }
10297
10298 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
10299
10300 static bfd_boolean
10301 ppc64_elf_hash_symbol (struct elf_link_hash_entry *h)
10302 {
10303 if (h->plt.plist != NULL
10304 && !h->def_regular
10305 && !h->pointer_equality_needed)
10306 return FALSE;
10307
10308 return _bfd_elf_hash_symbol (h);
10309 }
10310
10311 /* Determine the type of stub needed, if any, for a call. */
10312
10313 static inline enum ppc_stub_type
10314 ppc_type_of_stub (asection *input_sec,
10315 const Elf_Internal_Rela *rel,
10316 struct ppc_link_hash_entry **hash,
10317 struct plt_entry **plt_ent,
10318 bfd_vma destination,
10319 unsigned long local_off)
10320 {
10321 struct ppc_link_hash_entry *h = *hash;
10322 bfd_vma location;
10323 bfd_vma branch_offset;
10324 bfd_vma max_branch_offset;
10325 enum elf_ppc64_reloc_type r_type;
10326
10327 if (h != NULL)
10328 {
10329 struct plt_entry *ent;
10330 struct ppc_link_hash_entry *fdh = h;
10331 if (h->oh != NULL
10332 && h->oh->is_func_descriptor)
10333 {
10334 fdh = ppc_follow_link (h->oh);
10335 *hash = fdh;
10336 }
10337
10338 for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next)
10339 if (ent->addend == rel->r_addend
10340 && ent->plt.offset != (bfd_vma) -1)
10341 {
10342 *plt_ent = ent;
10343 return ppc_stub_plt_call;
10344 }
10345
10346 /* Here, we know we don't have a plt entry. If we don't have a
10347 either a defined function descriptor or a defined entry symbol
10348 in a regular object file, then it is pointless trying to make
10349 any other type of stub. */
10350 if (!is_static_defined (&fdh->elf)
10351 && !is_static_defined (&h->elf))
10352 return ppc_stub_none;
10353 }
10354 else if (elf_local_got_ents (input_sec->owner) != NULL)
10355 {
10356 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (input_sec->owner);
10357 struct plt_entry **local_plt = (struct plt_entry **)
10358 elf_local_got_ents (input_sec->owner) + symtab_hdr->sh_info;
10359 unsigned long r_symndx = ELF64_R_SYM (rel->r_info);
10360
10361 if (local_plt[r_symndx] != NULL)
10362 {
10363 struct plt_entry *ent;
10364
10365 for (ent = local_plt[r_symndx]; ent != NULL; ent = ent->next)
10366 if (ent->addend == rel->r_addend
10367 && ent->plt.offset != (bfd_vma) -1)
10368 {
10369 *plt_ent = ent;
10370 return ppc_stub_plt_call;
10371 }
10372 }
10373 }
10374
10375 /* Determine where the call point is. */
10376 location = (input_sec->output_offset
10377 + input_sec->output_section->vma
10378 + rel->r_offset);
10379
10380 branch_offset = destination - location;
10381 r_type = ELF64_R_TYPE (rel->r_info);
10382
10383 /* Determine if a long branch stub is needed. */
10384 max_branch_offset = 1 << 25;
10385 if (r_type != R_PPC64_REL24)
10386 max_branch_offset = 1 << 15;
10387
10388 if (branch_offset + max_branch_offset >= 2 * max_branch_offset - local_off)
10389 /* We need a stub. Figure out whether a long_branch or plt_branch
10390 is needed later. */
10391 return ppc_stub_long_branch;
10392
10393 return ppc_stub_none;
10394 }
10395
10396 /* With power7 weakly ordered memory model, it is possible for ld.so
10397 to update a plt entry in one thread and have another thread see a
10398 stale zero toc entry. To avoid this we need some sort of acquire
10399 barrier in the call stub. One solution is to make the load of the
10400 toc word seem to appear to depend on the load of the function entry
10401 word. Another solution is to test for r2 being zero, and branch to
10402 the appropriate glink entry if so.
10403
10404 . fake dep barrier compare
10405 . ld 12,xxx(2) ld 12,xxx(2)
10406 . mtctr 12 mtctr 12
10407 . xor 11,12,12 ld 2,xxx+8(2)
10408 . add 2,2,11 cmpldi 2,0
10409 . ld 2,xxx+8(2) bnectr+
10410 . bctr b <glink_entry>
10411
10412 The solution involving the compare turns out to be faster, so
10413 that's what we use unless the branch won't reach. */
10414
10415 #define ALWAYS_USE_FAKE_DEP 0
10416 #define ALWAYS_EMIT_R2SAVE 0
10417
10418 #define PPC_LO(v) ((v) & 0xffff)
10419 #define PPC_HI(v) (((v) >> 16) & 0xffff)
10420 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
10421
10422 static inline unsigned int
10423 plt_stub_size (struct ppc_link_hash_table *htab,
10424 struct ppc_stub_hash_entry *stub_entry,
10425 bfd_vma off)
10426 {
10427 unsigned size = 12;
10428
10429 if (ALWAYS_EMIT_R2SAVE
10430 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10431 size += 4;
10432 if (PPC_HA (off) != 0)
10433 size += 4;
10434 if (htab->opd_abi)
10435 {
10436 size += 4;
10437 if (htab->params->plt_static_chain)
10438 size += 4;
10439 if (htab->params->plt_thread_safe
10440 && htab->elf.dynamic_sections_created
10441 && stub_entry->h != NULL
10442 && stub_entry->h->elf.dynindx != -1)
10443 size += 8;
10444 if (PPC_HA (off + 8 + 8 * htab->params->plt_static_chain) != PPC_HA (off))
10445 size += 4;
10446 }
10447 if (stub_entry->h != NULL
10448 && (stub_entry->h == htab->tls_get_addr_fd
10449 || stub_entry->h == htab->tls_get_addr)
10450 && htab->params->tls_get_addr_opt)
10451 {
10452 size += 7 * 4;
10453 if (ALWAYS_EMIT_R2SAVE
10454 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10455 size += 6 * 4;
10456 }
10457 return size;
10458 }
10459
10460 /* Depending on the sign of plt_stub_align:
10461 If positive, return the padding to align to a 2**plt_stub_align
10462 boundary.
10463 If negative, if this stub would cross fewer 2**plt_stub_align
10464 boundaries if we align, then return the padding needed to do so. */
10465
10466 static inline unsigned int
10467 plt_stub_pad (struct ppc_link_hash_table *htab,
10468 struct ppc_stub_hash_entry *stub_entry,
10469 bfd_vma plt_off)
10470 {
10471 int stub_align;
10472 unsigned stub_size = plt_stub_size (htab, stub_entry, plt_off);
10473 bfd_vma stub_off = stub_entry->group->stub_sec->size;
10474
10475 if (htab->params->plt_stub_align >= 0)
10476 {
10477 stub_align = 1 << htab->params->plt_stub_align;
10478 if ((stub_off & (stub_align - 1)) != 0)
10479 return stub_align - (stub_off & (stub_align - 1));
10480 return 0;
10481 }
10482
10483 stub_align = 1 << -htab->params->plt_stub_align;
10484 if (((stub_off + stub_size - 1) & -stub_align) - (stub_off & -stub_align)
10485 > ((stub_size - 1) & -stub_align))
10486 return stub_align - (stub_off & (stub_align - 1));
10487 return 0;
10488 }
10489
10490 /* Build a .plt call stub. */
10491
10492 static inline bfd_byte *
10493 build_plt_stub (struct ppc_link_hash_table *htab,
10494 struct ppc_stub_hash_entry *stub_entry,
10495 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
10496 {
10497 bfd *obfd = htab->params->stub_bfd;
10498 bfd_boolean plt_load_toc = htab->opd_abi;
10499 bfd_boolean plt_static_chain = htab->params->plt_static_chain;
10500 bfd_boolean plt_thread_safe = (htab->params->plt_thread_safe
10501 && htab->elf.dynamic_sections_created
10502 && stub_entry->h != NULL
10503 && stub_entry->h->elf.dynindx != -1);
10504 bfd_boolean use_fake_dep = plt_thread_safe;
10505 bfd_vma cmp_branch_off = 0;
10506
10507 if (!ALWAYS_USE_FAKE_DEP
10508 && plt_load_toc
10509 && plt_thread_safe
10510 && !((stub_entry->h == htab->tls_get_addr_fd
10511 || stub_entry->h == htab->tls_get_addr)
10512 && htab->params->tls_get_addr_opt))
10513 {
10514 bfd_vma pltoff = stub_entry->plt_ent->plt.offset & ~1;
10515 bfd_vma pltindex = ((pltoff - PLT_INITIAL_ENTRY_SIZE (htab))
10516 / PLT_ENTRY_SIZE (htab));
10517 bfd_vma glinkoff = GLINK_CALL_STUB_SIZE + pltindex * 8;
10518 bfd_vma to, from;
10519
10520 if (pltindex > 32768)
10521 glinkoff += (pltindex - 32768) * 4;
10522 to = (glinkoff
10523 + htab->glink->output_offset
10524 + htab->glink->output_section->vma);
10525 from = (p - stub_entry->group->stub_sec->contents
10526 + 4 * (ALWAYS_EMIT_R2SAVE
10527 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10528 + 4 * (PPC_HA (offset) != 0)
10529 + 4 * (PPC_HA (offset + 8 + 8 * plt_static_chain)
10530 != PPC_HA (offset))
10531 + 4 * (plt_static_chain != 0)
10532 + 20
10533 + stub_entry->group->stub_sec->output_offset
10534 + stub_entry->group->stub_sec->output_section->vma);
10535 cmp_branch_off = to - from;
10536 use_fake_dep = cmp_branch_off + (1 << 25) >= (1 << 26);
10537 }
10538
10539 if (PPC_HA (offset) != 0)
10540 {
10541 if (r != NULL)
10542 {
10543 if (ALWAYS_EMIT_R2SAVE
10544 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10545 r[0].r_offset += 4;
10546 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
10547 r[1].r_offset = r[0].r_offset + 4;
10548 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10549 r[1].r_addend = r[0].r_addend;
10550 if (plt_load_toc)
10551 {
10552 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10553 {
10554 r[2].r_offset = r[1].r_offset + 4;
10555 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO);
10556 r[2].r_addend = r[0].r_addend;
10557 }
10558 else
10559 {
10560 r[2].r_offset = r[1].r_offset + 8 + 8 * use_fake_dep;
10561 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10562 r[2].r_addend = r[0].r_addend + 8;
10563 if (plt_static_chain)
10564 {
10565 r[3].r_offset = r[2].r_offset + 4;
10566 r[3].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10567 r[3].r_addend = r[0].r_addend + 16;
10568 }
10569 }
10570 }
10571 }
10572 if (ALWAYS_EMIT_R2SAVE
10573 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10574 bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p), p += 4;
10575 if (plt_load_toc)
10576 {
10577 bfd_put_32 (obfd, ADDIS_R11_R2 | PPC_HA (offset), p), p += 4;
10578 bfd_put_32 (obfd, LD_R12_0R11 | PPC_LO (offset), p), p += 4;
10579 }
10580 else
10581 {
10582 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
10583 bfd_put_32 (obfd, LD_R12_0R12 | PPC_LO (offset), p), p += 4;
10584 }
10585 if (plt_load_toc
10586 && PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10587 {
10588 bfd_put_32 (obfd, ADDI_R11_R11 | PPC_LO (offset), p), p += 4;
10589 offset = 0;
10590 }
10591 bfd_put_32 (obfd, MTCTR_R12, p), p += 4;
10592 if (plt_load_toc)
10593 {
10594 if (use_fake_dep)
10595 {
10596 bfd_put_32 (obfd, XOR_R2_R12_R12, p), p += 4;
10597 bfd_put_32 (obfd, ADD_R11_R11_R2, p), p += 4;
10598 }
10599 bfd_put_32 (obfd, LD_R2_0R11 | PPC_LO (offset + 8), p), p += 4;
10600 if (plt_static_chain)
10601 bfd_put_32 (obfd, LD_R11_0R11 | PPC_LO (offset + 16), p), p += 4;
10602 }
10603 }
10604 else
10605 {
10606 if (r != NULL)
10607 {
10608 if (ALWAYS_EMIT_R2SAVE
10609 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10610 r[0].r_offset += 4;
10611 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10612 if (plt_load_toc)
10613 {
10614 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10615 {
10616 r[1].r_offset = r[0].r_offset + 4;
10617 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16);
10618 r[1].r_addend = r[0].r_addend;
10619 }
10620 else
10621 {
10622 r[1].r_offset = r[0].r_offset + 8 + 8 * use_fake_dep;
10623 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10624 r[1].r_addend = r[0].r_addend + 8 + 8 * plt_static_chain;
10625 if (plt_static_chain)
10626 {
10627 r[2].r_offset = r[1].r_offset + 4;
10628 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10629 r[2].r_addend = r[0].r_addend + 8;
10630 }
10631 }
10632 }
10633 }
10634 if (ALWAYS_EMIT_R2SAVE
10635 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10636 bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p), p += 4;
10637 bfd_put_32 (obfd, LD_R12_0R2 | PPC_LO (offset), p), p += 4;
10638 if (plt_load_toc
10639 && PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10640 {
10641 bfd_put_32 (obfd, ADDI_R2_R2 | PPC_LO (offset), p), p += 4;
10642 offset = 0;
10643 }
10644 bfd_put_32 (obfd, MTCTR_R12, p), p += 4;
10645 if (plt_load_toc)
10646 {
10647 if (use_fake_dep)
10648 {
10649 bfd_put_32 (obfd, XOR_R11_R12_R12, p), p += 4;
10650 bfd_put_32 (obfd, ADD_R2_R2_R11, p), p += 4;
10651 }
10652 if (plt_static_chain)
10653 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset + 16), p), p += 4;
10654 bfd_put_32 (obfd, LD_R2_0R2 | PPC_LO (offset + 8), p), p += 4;
10655 }
10656 }
10657 if (plt_load_toc && plt_thread_safe && !use_fake_dep)
10658 {
10659 bfd_put_32 (obfd, CMPLDI_R2_0, p), p += 4;
10660 bfd_put_32 (obfd, BNECTR_P4, p), p += 4;
10661 bfd_put_32 (obfd, B_DOT | (cmp_branch_off & 0x3fffffc), p), p += 4;
10662 }
10663 else
10664 bfd_put_32 (obfd, BCTR, p), p += 4;
10665 return p;
10666 }
10667
10668 /* Build a special .plt call stub for __tls_get_addr. */
10669
10670 #define LD_R11_0R3 0xe9630000
10671 #define LD_R12_0R3 0xe9830000
10672 #define MR_R0_R3 0x7c601b78
10673 #define CMPDI_R11_0 0x2c2b0000
10674 #define ADD_R3_R12_R13 0x7c6c6a14
10675 #define BEQLR 0x4d820020
10676 #define MR_R3_R0 0x7c030378
10677 #define STD_R11_0R1 0xf9610000
10678 #define BCTRL 0x4e800421
10679 #define LD_R11_0R1 0xe9610000
10680 #define MTLR_R11 0x7d6803a6
10681
10682 static inline bfd_byte *
10683 build_tls_get_addr_stub (struct ppc_link_hash_table *htab,
10684 struct ppc_stub_hash_entry *stub_entry,
10685 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
10686 {
10687 bfd *obfd = htab->params->stub_bfd;
10688
10689 bfd_put_32 (obfd, LD_R11_0R3 + 0, p), p += 4;
10690 bfd_put_32 (obfd, LD_R12_0R3 + 8, p), p += 4;
10691 bfd_put_32 (obfd, MR_R0_R3, p), p += 4;
10692 bfd_put_32 (obfd, CMPDI_R11_0, p), p += 4;
10693 bfd_put_32 (obfd, ADD_R3_R12_R13, p), p += 4;
10694 bfd_put_32 (obfd, BEQLR, p), p += 4;
10695 bfd_put_32 (obfd, MR_R3_R0, p), p += 4;
10696 if (r != NULL)
10697 r[0].r_offset += 7 * 4;
10698 if (!ALWAYS_EMIT_R2SAVE
10699 && stub_entry->stub_type != ppc_stub_plt_call_r2save)
10700 return build_plt_stub (htab, stub_entry, p, offset, r);
10701
10702 bfd_put_32 (obfd, MFLR_R11, p), p += 4;
10703 bfd_put_32 (obfd, STD_R11_0R1 + STK_LINKER (htab), p), p += 4;
10704
10705 if (r != NULL)
10706 r[0].r_offset += 2 * 4;
10707 p = build_plt_stub (htab, stub_entry, p, offset, r);
10708 bfd_put_32 (obfd, BCTRL, p - 4);
10709
10710 bfd_put_32 (obfd, LD_R2_0R1 + STK_TOC (htab), p), p += 4;
10711 bfd_put_32 (obfd, LD_R11_0R1 + STK_LINKER (htab), p), p += 4;
10712 bfd_put_32 (obfd, MTLR_R11, p), p += 4;
10713 bfd_put_32 (obfd, BLR, p), p += 4;
10714
10715 return p;
10716 }
10717
10718 static Elf_Internal_Rela *
10719 get_relocs (asection *sec, int count)
10720 {
10721 Elf_Internal_Rela *relocs;
10722 struct bfd_elf_section_data *elfsec_data;
10723
10724 elfsec_data = elf_section_data (sec);
10725 relocs = elfsec_data->relocs;
10726 if (relocs == NULL)
10727 {
10728 bfd_size_type relsize;
10729 relsize = sec->reloc_count * sizeof (*relocs);
10730 relocs = bfd_alloc (sec->owner, relsize);
10731 if (relocs == NULL)
10732 return NULL;
10733 elfsec_data->relocs = relocs;
10734 elfsec_data->rela.hdr = bfd_zalloc (sec->owner,
10735 sizeof (Elf_Internal_Shdr));
10736 if (elfsec_data->rela.hdr == NULL)
10737 return NULL;
10738 elfsec_data->rela.hdr->sh_size = (sec->reloc_count
10739 * sizeof (Elf64_External_Rela));
10740 elfsec_data->rela.hdr->sh_entsize = sizeof (Elf64_External_Rela);
10741 sec->reloc_count = 0;
10742 }
10743 relocs += sec->reloc_count;
10744 sec->reloc_count += count;
10745 return relocs;
10746 }
10747
10748 static bfd_vma
10749 get_r2off (struct bfd_link_info *info,
10750 struct ppc_stub_hash_entry *stub_entry)
10751 {
10752 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10753 bfd_vma r2off = htab->sec_info[stub_entry->target_section->id].toc_off;
10754
10755 if (r2off == 0)
10756 {
10757 /* Support linking -R objects. Get the toc pointer from the
10758 opd entry. */
10759 char buf[8];
10760 if (!htab->opd_abi)
10761 return r2off;
10762 asection *opd = stub_entry->h->elf.root.u.def.section;
10763 bfd_vma opd_off = stub_entry->h->elf.root.u.def.value;
10764
10765 if (strcmp (opd->name, ".opd") != 0
10766 || opd->reloc_count != 0)
10767 {
10768 info->callbacks->einfo (_("%P: cannot find opd entry toc for `%T'\n"),
10769 stub_entry->h->elf.root.root.string);
10770 bfd_set_error (bfd_error_bad_value);
10771 return (bfd_vma) -1;
10772 }
10773 if (!bfd_get_section_contents (opd->owner, opd, buf, opd_off + 8, 8))
10774 return (bfd_vma) -1;
10775 r2off = bfd_get_64 (opd->owner, buf);
10776 r2off -= elf_gp (info->output_bfd);
10777 }
10778 r2off -= htab->sec_info[stub_entry->group->link_sec->id].toc_off;
10779 return r2off;
10780 }
10781
10782 static bfd_boolean
10783 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
10784 {
10785 struct ppc_stub_hash_entry *stub_entry;
10786 struct ppc_branch_hash_entry *br_entry;
10787 struct bfd_link_info *info;
10788 struct ppc_link_hash_table *htab;
10789 bfd_byte *loc;
10790 bfd_byte *p;
10791 bfd_vma dest, off;
10792 int size;
10793 Elf_Internal_Rela *r;
10794 asection *plt;
10795
10796 /* Massage our args to the form they really have. */
10797 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
10798 info = in_arg;
10799
10800 htab = ppc_hash_table (info);
10801 if (htab == NULL)
10802 return FALSE;
10803
10804 /* Make a note of the offset within the stubs for this entry. */
10805 stub_entry->stub_offset = stub_entry->group->stub_sec->size;
10806 loc = stub_entry->group->stub_sec->contents + stub_entry->stub_offset;
10807
10808 htab->stub_count[stub_entry->stub_type - 1] += 1;
10809 switch (stub_entry->stub_type)
10810 {
10811 case ppc_stub_long_branch:
10812 case ppc_stub_long_branch_r2off:
10813 /* Branches are relative. This is where we are going to. */
10814 dest = (stub_entry->target_value
10815 + stub_entry->target_section->output_offset
10816 + stub_entry->target_section->output_section->vma);
10817 dest += PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
10818 off = dest;
10819
10820 /* And this is where we are coming from. */
10821 off -= (stub_entry->stub_offset
10822 + stub_entry->group->stub_sec->output_offset
10823 + stub_entry->group->stub_sec->output_section->vma);
10824
10825 size = 4;
10826 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
10827 {
10828 bfd_vma r2off = get_r2off (info, stub_entry);
10829
10830 if (r2off == (bfd_vma) -1)
10831 {
10832 htab->stub_error = TRUE;
10833 return FALSE;
10834 }
10835 bfd_put_32 (htab->params->stub_bfd, STD_R2_0R1 + STK_TOC (htab), loc);
10836 loc += 4;
10837 size = 8;
10838 if (PPC_HA (r2off) != 0)
10839 {
10840 bfd_put_32 (htab->params->stub_bfd,
10841 ADDIS_R2_R2 | PPC_HA (r2off), loc);
10842 loc += 4;
10843 size += 4;
10844 }
10845 if (PPC_LO (r2off) != 0)
10846 {
10847 bfd_put_32 (htab->params->stub_bfd,
10848 ADDI_R2_R2 | PPC_LO (r2off), loc);
10849 loc += 4;
10850 size += 4;
10851 }
10852 off -= size - 4;
10853 }
10854 bfd_put_32 (htab->params->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
10855
10856 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
10857 {
10858 info->callbacks->einfo
10859 (_("%P: long branch stub `%s' offset overflow\n"),
10860 stub_entry->root.string);
10861 htab->stub_error = TRUE;
10862 return FALSE;
10863 }
10864
10865 if (info->emitrelocations)
10866 {
10867 r = get_relocs (stub_entry->group->stub_sec, 1);
10868 if (r == NULL)
10869 return FALSE;
10870 r->r_offset = loc - stub_entry->group->stub_sec->contents;
10871 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
10872 r->r_addend = dest;
10873 if (stub_entry->h != NULL)
10874 {
10875 struct elf_link_hash_entry **hashes;
10876 unsigned long symndx;
10877 struct ppc_link_hash_entry *h;
10878
10879 hashes = elf_sym_hashes (htab->params->stub_bfd);
10880 if (hashes == NULL)
10881 {
10882 bfd_size_type hsize;
10883
10884 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
10885 hashes = bfd_zalloc (htab->params->stub_bfd, hsize);
10886 if (hashes == NULL)
10887 return FALSE;
10888 elf_sym_hashes (htab->params->stub_bfd) = hashes;
10889 htab->stub_globals = 1;
10890 }
10891 symndx = htab->stub_globals++;
10892 h = stub_entry->h;
10893 hashes[symndx] = &h->elf;
10894 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
10895 if (h->oh != NULL && h->oh->is_func)
10896 h = ppc_follow_link (h->oh);
10897 if (h->elf.root.u.def.section != stub_entry->target_section)
10898 /* H is an opd symbol. The addend must be zero. */
10899 r->r_addend = 0;
10900 else
10901 {
10902 off = (h->elf.root.u.def.value
10903 + h->elf.root.u.def.section->output_offset
10904 + h->elf.root.u.def.section->output_section->vma);
10905 r->r_addend -= off;
10906 }
10907 }
10908 }
10909 break;
10910
10911 case ppc_stub_plt_branch:
10912 case ppc_stub_plt_branch_r2off:
10913 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
10914 stub_entry->root.string + 9,
10915 FALSE, FALSE);
10916 if (br_entry == NULL)
10917 {
10918 info->callbacks->einfo (_("%P: can't find branch stub `%s'\n"),
10919 stub_entry->root.string);
10920 htab->stub_error = TRUE;
10921 return FALSE;
10922 }
10923
10924 dest = (stub_entry->target_value
10925 + stub_entry->target_section->output_offset
10926 + stub_entry->target_section->output_section->vma);
10927 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
10928 dest += PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
10929
10930 bfd_put_64 (htab->brlt->owner, dest,
10931 htab->brlt->contents + br_entry->offset);
10932
10933 if (br_entry->iter == htab->stub_iteration)
10934 {
10935 br_entry->iter = 0;
10936
10937 if (htab->relbrlt != NULL)
10938 {
10939 /* Create a reloc for the branch lookup table entry. */
10940 Elf_Internal_Rela rela;
10941 bfd_byte *rl;
10942
10943 rela.r_offset = (br_entry->offset
10944 + htab->brlt->output_offset
10945 + htab->brlt->output_section->vma);
10946 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
10947 rela.r_addend = dest;
10948
10949 rl = htab->relbrlt->contents;
10950 rl += (htab->relbrlt->reloc_count++
10951 * sizeof (Elf64_External_Rela));
10952 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
10953 }
10954 else if (info->emitrelocations)
10955 {
10956 r = get_relocs (htab->brlt, 1);
10957 if (r == NULL)
10958 return FALSE;
10959 /* brlt, being SEC_LINKER_CREATED does not go through the
10960 normal reloc processing. Symbols and offsets are not
10961 translated from input file to output file form, so
10962 set up the offset per the output file. */
10963 r->r_offset = (br_entry->offset
10964 + htab->brlt->output_offset
10965 + htab->brlt->output_section->vma);
10966 r->r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
10967 r->r_addend = dest;
10968 }
10969 }
10970
10971 dest = (br_entry->offset
10972 + htab->brlt->output_offset
10973 + htab->brlt->output_section->vma);
10974
10975 off = (dest
10976 - elf_gp (htab->brlt->output_section->owner)
10977 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
10978
10979 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
10980 {
10981 info->callbacks->einfo
10982 (_("%P: linkage table error against `%T'\n"),
10983 stub_entry->root.string);
10984 bfd_set_error (bfd_error_bad_value);
10985 htab->stub_error = TRUE;
10986 return FALSE;
10987 }
10988
10989 if (info->emitrelocations)
10990 {
10991 r = get_relocs (stub_entry->group->stub_sec, 1 + (PPC_HA (off) != 0));
10992 if (r == NULL)
10993 return FALSE;
10994 r[0].r_offset = loc - stub_entry->group->stub_sec->contents;
10995 if (bfd_big_endian (info->output_bfd))
10996 r[0].r_offset += 2;
10997 if (stub_entry->stub_type == ppc_stub_plt_branch_r2off)
10998 r[0].r_offset += 4;
10999 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
11000 r[0].r_addend = dest;
11001 if (PPC_HA (off) != 0)
11002 {
11003 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
11004 r[1].r_offset = r[0].r_offset + 4;
11005 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
11006 r[1].r_addend = r[0].r_addend;
11007 }
11008 }
11009
11010 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
11011 {
11012 if (PPC_HA (off) != 0)
11013 {
11014 size = 16;
11015 bfd_put_32 (htab->params->stub_bfd,
11016 ADDIS_R12_R2 | PPC_HA (off), loc);
11017 loc += 4;
11018 bfd_put_32 (htab->params->stub_bfd,
11019 LD_R12_0R12 | PPC_LO (off), loc);
11020 }
11021 else
11022 {
11023 size = 12;
11024 bfd_put_32 (htab->params->stub_bfd,
11025 LD_R12_0R2 | PPC_LO (off), loc);
11026 }
11027 }
11028 else
11029 {
11030 bfd_vma r2off = get_r2off (info, stub_entry);
11031
11032 if (r2off == (bfd_vma) -1)
11033 {
11034 htab->stub_error = TRUE;
11035 return FALSE;
11036 }
11037
11038 bfd_put_32 (htab->params->stub_bfd, STD_R2_0R1 + STK_TOC (htab), loc);
11039 loc += 4;
11040 size = 16;
11041 if (PPC_HA (off) != 0)
11042 {
11043 size += 4;
11044 bfd_put_32 (htab->params->stub_bfd,
11045 ADDIS_R12_R2 | PPC_HA (off), loc);
11046 loc += 4;
11047 bfd_put_32 (htab->params->stub_bfd,
11048 LD_R12_0R12 | PPC_LO (off), loc);
11049 }
11050 else
11051 bfd_put_32 (htab->params->stub_bfd, LD_R12_0R2 | PPC_LO (off), loc);
11052
11053 if (PPC_HA (r2off) != 0)
11054 {
11055 size += 4;
11056 loc += 4;
11057 bfd_put_32 (htab->params->stub_bfd,
11058 ADDIS_R2_R2 | PPC_HA (r2off), loc);
11059 }
11060 if (PPC_LO (r2off) != 0)
11061 {
11062 size += 4;
11063 loc += 4;
11064 bfd_put_32 (htab->params->stub_bfd,
11065 ADDI_R2_R2 | PPC_LO (r2off), loc);
11066 }
11067 }
11068 loc += 4;
11069 bfd_put_32 (htab->params->stub_bfd, MTCTR_R12, loc);
11070 loc += 4;
11071 bfd_put_32 (htab->params->stub_bfd, BCTR, loc);
11072 break;
11073
11074 case ppc_stub_plt_call:
11075 case ppc_stub_plt_call_r2save:
11076 if (stub_entry->h != NULL
11077 && stub_entry->h->is_func_descriptor
11078 && stub_entry->h->oh != NULL)
11079 {
11080 struct ppc_link_hash_entry *fh = ppc_follow_link (stub_entry->h->oh);
11081
11082 /* If the old-ABI "dot-symbol" is undefined make it weak so
11083 we don't get a link error from RELOC_FOR_GLOBAL_SYMBOL. */
11084 if (fh->elf.root.type == bfd_link_hash_undefined
11085 && (stub_entry->h->elf.root.type == bfd_link_hash_defined
11086 || stub_entry->h->elf.root.type == bfd_link_hash_defweak))
11087 fh->elf.root.type = bfd_link_hash_undefweak;
11088 }
11089
11090 /* Now build the stub. */
11091 dest = stub_entry->plt_ent->plt.offset & ~1;
11092 if (dest >= (bfd_vma) -2)
11093 abort ();
11094
11095 plt = htab->elf.splt;
11096 if (!htab->elf.dynamic_sections_created
11097 || stub_entry->h == NULL
11098 || stub_entry->h->elf.dynindx == -1)
11099 plt = htab->elf.iplt;
11100
11101 dest += plt->output_offset + plt->output_section->vma;
11102
11103 if (stub_entry->h == NULL
11104 && (stub_entry->plt_ent->plt.offset & 1) == 0)
11105 {
11106 Elf_Internal_Rela rela;
11107 bfd_byte *rl;
11108
11109 rela.r_offset = dest;
11110 if (htab->opd_abi)
11111 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
11112 else
11113 rela.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
11114 rela.r_addend = (stub_entry->target_value
11115 + stub_entry->target_section->output_offset
11116 + stub_entry->target_section->output_section->vma);
11117
11118 rl = (htab->elf.irelplt->contents
11119 + (htab->elf.irelplt->reloc_count++
11120 * sizeof (Elf64_External_Rela)));
11121 bfd_elf64_swap_reloca_out (info->output_bfd, &rela, rl);
11122 stub_entry->plt_ent->plt.offset |= 1;
11123 htab->local_ifunc_resolver = 1;
11124 }
11125
11126 off = (dest
11127 - elf_gp (plt->output_section->owner)
11128 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11129
11130 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
11131 {
11132 info->callbacks->einfo
11133 /* xgettext:c-format */
11134 (_("%P: linkage table error against `%T'\n"),
11135 stub_entry->h != NULL
11136 ? stub_entry->h->elf.root.root.string
11137 : "<local sym>");
11138 bfd_set_error (bfd_error_bad_value);
11139 htab->stub_error = TRUE;
11140 return FALSE;
11141 }
11142
11143 if (htab->params->plt_stub_align != 0)
11144 {
11145 unsigned pad = plt_stub_pad (htab, stub_entry, off);
11146
11147 stub_entry->group->stub_sec->size += pad;
11148 stub_entry->stub_offset = stub_entry->group->stub_sec->size;
11149 loc += pad;
11150 }
11151
11152 r = NULL;
11153 if (info->emitrelocations)
11154 {
11155 r = get_relocs (stub_entry->group->stub_sec,
11156 ((PPC_HA (off) != 0)
11157 + (htab->opd_abi
11158 ? 2 + (htab->params->plt_static_chain
11159 && PPC_HA (off + 16) == PPC_HA (off))
11160 : 1)));
11161 if (r == NULL)
11162 return FALSE;
11163 r[0].r_offset = loc - stub_entry->group->stub_sec->contents;
11164 if (bfd_big_endian (info->output_bfd))
11165 r[0].r_offset += 2;
11166 r[0].r_addend = dest;
11167 }
11168 if (stub_entry->h != NULL
11169 && (stub_entry->h == htab->tls_get_addr_fd
11170 || stub_entry->h == htab->tls_get_addr)
11171 && htab->params->tls_get_addr_opt)
11172 p = build_tls_get_addr_stub (htab, stub_entry, loc, off, r);
11173 else
11174 p = build_plt_stub (htab, stub_entry, loc, off, r);
11175 size = p - loc;
11176 break;
11177
11178 case ppc_stub_save_res:
11179 return TRUE;
11180
11181 default:
11182 BFD_FAIL ();
11183 return FALSE;
11184 }
11185
11186 stub_entry->group->stub_sec->size += size;
11187
11188 if (htab->params->emit_stub_syms)
11189 {
11190 struct elf_link_hash_entry *h;
11191 size_t len1, len2;
11192 char *name;
11193 const char *const stub_str[] = { "long_branch",
11194 "long_branch_r2off",
11195 "plt_branch",
11196 "plt_branch_r2off",
11197 "plt_call",
11198 "plt_call" };
11199
11200 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
11201 len2 = strlen (stub_entry->root.string);
11202 name = bfd_malloc (len1 + len2 + 2);
11203 if (name == NULL)
11204 return FALSE;
11205 memcpy (name, stub_entry->root.string, 9);
11206 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
11207 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
11208 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
11209 if (h == NULL)
11210 return FALSE;
11211 if (h->root.type == bfd_link_hash_new)
11212 {
11213 h->root.type = bfd_link_hash_defined;
11214 h->root.u.def.section = stub_entry->group->stub_sec;
11215 h->root.u.def.value = stub_entry->stub_offset;
11216 h->ref_regular = 1;
11217 h->def_regular = 1;
11218 h->ref_regular_nonweak = 1;
11219 h->forced_local = 1;
11220 h->non_elf = 0;
11221 h->root.linker_def = 1;
11222 }
11223 }
11224
11225 return TRUE;
11226 }
11227
11228 /* As above, but don't actually build the stub. Just bump offset so
11229 we know stub section sizes, and select plt_branch stubs where
11230 long_branch stubs won't do. */
11231
11232 static bfd_boolean
11233 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
11234 {
11235 struct ppc_stub_hash_entry *stub_entry;
11236 struct bfd_link_info *info;
11237 struct ppc_link_hash_table *htab;
11238 bfd_vma off;
11239 int size;
11240
11241 /* Massage our args to the form they really have. */
11242 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
11243 info = in_arg;
11244
11245 htab = ppc_hash_table (info);
11246 if (htab == NULL)
11247 return FALSE;
11248
11249 if (stub_entry->h != NULL
11250 && stub_entry->h->save_res
11251 && stub_entry->h->elf.root.type == bfd_link_hash_defined
11252 && stub_entry->h->elf.root.u.def.section == htab->sfpr)
11253 {
11254 /* Don't make stubs to out-of-line register save/restore
11255 functions. Instead, emit copies of the functions. */
11256 stub_entry->group->needs_save_res = 1;
11257 stub_entry->stub_type = ppc_stub_save_res;
11258 return TRUE;
11259 }
11260
11261 if (stub_entry->stub_type == ppc_stub_plt_call
11262 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
11263 {
11264 asection *plt;
11265 off = stub_entry->plt_ent->plt.offset & ~(bfd_vma) 1;
11266 if (off >= (bfd_vma) -2)
11267 abort ();
11268 plt = htab->elf.splt;
11269 if (!htab->elf.dynamic_sections_created
11270 || stub_entry->h == NULL
11271 || stub_entry->h->elf.dynindx == -1)
11272 plt = htab->elf.iplt;
11273 off += (plt->output_offset
11274 + plt->output_section->vma
11275 - elf_gp (plt->output_section->owner)
11276 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11277
11278 size = plt_stub_size (htab, stub_entry, off);
11279 if (stub_entry->h != NULL
11280 && (stub_entry->h == htab->tls_get_addr_fd
11281 || stub_entry->h == htab->tls_get_addr)
11282 && htab->params->tls_get_addr_opt
11283 && (ALWAYS_EMIT_R2SAVE
11284 || stub_entry->stub_type == ppc_stub_plt_call_r2save))
11285 stub_entry->group->tls_get_addr_opt_bctrl
11286 = stub_entry->group->stub_sec->size + size - 5 * 4;
11287
11288 if (htab->params->plt_stub_align)
11289 size += plt_stub_pad (htab, stub_entry, off);
11290 if (info->emitrelocations)
11291 {
11292 stub_entry->group->stub_sec->reloc_count
11293 += ((PPC_HA (off) != 0)
11294 + (htab->opd_abi
11295 ? 2 + (htab->params->plt_static_chain
11296 && PPC_HA (off + 16) == PPC_HA (off))
11297 : 1));
11298 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11299 }
11300 }
11301 else
11302 {
11303 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
11304 variants. */
11305 bfd_vma r2off = 0;
11306 bfd_vma local_off = 0;
11307
11308 off = (stub_entry->target_value
11309 + stub_entry->target_section->output_offset
11310 + stub_entry->target_section->output_section->vma);
11311 off -= (stub_entry->group->stub_sec->size
11312 + stub_entry->group->stub_sec->output_offset
11313 + stub_entry->group->stub_sec->output_section->vma);
11314
11315 /* Reset the stub type from the plt variant in case we now
11316 can reach with a shorter stub. */
11317 if (stub_entry->stub_type >= ppc_stub_plt_branch)
11318 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
11319
11320 size = 4;
11321 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
11322 {
11323 r2off = get_r2off (info, stub_entry);
11324 if (r2off == (bfd_vma) -1)
11325 {
11326 htab->stub_error = TRUE;
11327 return FALSE;
11328 }
11329 size = 8;
11330 if (PPC_HA (r2off) != 0)
11331 size += 4;
11332 if (PPC_LO (r2off) != 0)
11333 size += 4;
11334 off -= size - 4;
11335 }
11336
11337 local_off = PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
11338
11339 /* If the branch offset if too big, use a ppc_stub_plt_branch.
11340 Do the same for -R objects without function descriptors. */
11341 if (off + (1 << 25) >= (bfd_vma) (1 << 26) - local_off
11342 || (stub_entry->stub_type == ppc_stub_long_branch_r2off
11343 && r2off == 0
11344 && htab->sec_info[stub_entry->target_section->id].toc_off == 0))
11345 {
11346 struct ppc_branch_hash_entry *br_entry;
11347
11348 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
11349 stub_entry->root.string + 9,
11350 TRUE, FALSE);
11351 if (br_entry == NULL)
11352 {
11353 info->callbacks->einfo (_("%P: can't build branch stub `%s'\n"),
11354 stub_entry->root.string);
11355 htab->stub_error = TRUE;
11356 return FALSE;
11357 }
11358
11359 if (br_entry->iter != htab->stub_iteration)
11360 {
11361 br_entry->iter = htab->stub_iteration;
11362 br_entry->offset = htab->brlt->size;
11363 htab->brlt->size += 8;
11364
11365 if (htab->relbrlt != NULL)
11366 htab->relbrlt->size += sizeof (Elf64_External_Rela);
11367 else if (info->emitrelocations)
11368 {
11369 htab->brlt->reloc_count += 1;
11370 htab->brlt->flags |= SEC_RELOC;
11371 }
11372 }
11373
11374 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
11375 off = (br_entry->offset
11376 + htab->brlt->output_offset
11377 + htab->brlt->output_section->vma
11378 - elf_gp (htab->brlt->output_section->owner)
11379 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11380
11381 if (info->emitrelocations)
11382 {
11383 stub_entry->group->stub_sec->reloc_count
11384 += 1 + (PPC_HA (off) != 0);
11385 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11386 }
11387
11388 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
11389 {
11390 size = 12;
11391 if (PPC_HA (off) != 0)
11392 size = 16;
11393 }
11394 else
11395 {
11396 size = 16;
11397 if (PPC_HA (off) != 0)
11398 size += 4;
11399
11400 if (PPC_HA (r2off) != 0)
11401 size += 4;
11402 if (PPC_LO (r2off) != 0)
11403 size += 4;
11404 }
11405 }
11406 else if (info->emitrelocations)
11407 {
11408 stub_entry->group->stub_sec->reloc_count += 1;
11409 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11410 }
11411 }
11412
11413 stub_entry->group->stub_sec->size += size;
11414 return TRUE;
11415 }
11416
11417 /* Set up various things so that we can make a list of input sections
11418 for each output section included in the link. Returns -1 on error,
11419 0 when no stubs will be needed, and 1 on success. */
11420
11421 int
11422 ppc64_elf_setup_section_lists (struct bfd_link_info *info)
11423 {
11424 unsigned int id;
11425 bfd_size_type amt;
11426 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11427
11428 if (htab == NULL)
11429 return -1;
11430
11431 htab->sec_info_arr_size = bfd_get_next_section_id ();
11432 amt = sizeof (*htab->sec_info) * (htab->sec_info_arr_size);
11433 htab->sec_info = bfd_zmalloc (amt);
11434 if (htab->sec_info == NULL)
11435 return -1;
11436
11437 /* Set toc_off for com, und, abs and ind sections. */
11438 for (id = 0; id < 3; id++)
11439 htab->sec_info[id].toc_off = TOC_BASE_OFF;
11440
11441 return 1;
11442 }
11443
11444 /* Set up for first pass at multitoc partitioning. */
11445
11446 void
11447 ppc64_elf_start_multitoc_partition (struct bfd_link_info *info)
11448 {
11449 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11450
11451 htab->toc_curr = ppc64_elf_set_toc (info, info->output_bfd);
11452 htab->toc_bfd = NULL;
11453 htab->toc_first_sec = NULL;
11454 }
11455
11456 /* The linker repeatedly calls this function for each TOC input section
11457 and linker generated GOT section. Group input bfds such that the toc
11458 within a group is less than 64k in size. */
11459
11460 bfd_boolean
11461 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
11462 {
11463 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11464 bfd_vma addr, off, limit;
11465
11466 if (htab == NULL)
11467 return FALSE;
11468
11469 if (!htab->second_toc_pass)
11470 {
11471 /* Keep track of the first .toc or .got section for this input bfd. */
11472 bfd_boolean new_bfd = htab->toc_bfd != isec->owner;
11473
11474 if (new_bfd)
11475 {
11476 htab->toc_bfd = isec->owner;
11477 htab->toc_first_sec = isec;
11478 }
11479
11480 addr = isec->output_offset + isec->output_section->vma;
11481 off = addr - htab->toc_curr;
11482 limit = 0x80008000;
11483 if (ppc64_elf_tdata (isec->owner)->has_small_toc_reloc)
11484 limit = 0x10000;
11485 if (off + isec->size > limit)
11486 {
11487 addr = (htab->toc_first_sec->output_offset
11488 + htab->toc_first_sec->output_section->vma);
11489 htab->toc_curr = addr;
11490 htab->toc_curr &= -TOC_BASE_ALIGN;
11491 }
11492
11493 /* toc_curr is the base address of this toc group. Set elf_gp
11494 for the input section to be the offset relative to the
11495 output toc base plus 0x8000. Making the input elf_gp an
11496 offset allows us to move the toc as a whole without
11497 recalculating input elf_gp. */
11498 off = htab->toc_curr - elf_gp (isec->output_section->owner);
11499 off += TOC_BASE_OFF;
11500
11501 /* Die if someone uses a linker script that doesn't keep input
11502 file .toc and .got together. */
11503 if (new_bfd
11504 && elf_gp (isec->owner) != 0
11505 && elf_gp (isec->owner) != off)
11506 return FALSE;
11507
11508 elf_gp (isec->owner) = off;
11509 return TRUE;
11510 }
11511
11512 /* During the second pass toc_first_sec points to the start of
11513 a toc group, and toc_curr is used to track the old elf_gp.
11514 We use toc_bfd to ensure we only look at each bfd once. */
11515 if (htab->toc_bfd == isec->owner)
11516 return TRUE;
11517 htab->toc_bfd = isec->owner;
11518
11519 if (htab->toc_first_sec == NULL
11520 || htab->toc_curr != elf_gp (isec->owner))
11521 {
11522 htab->toc_curr = elf_gp (isec->owner);
11523 htab->toc_first_sec = isec;
11524 }
11525 addr = (htab->toc_first_sec->output_offset
11526 + htab->toc_first_sec->output_section->vma);
11527 off = addr - elf_gp (isec->output_section->owner) + TOC_BASE_OFF;
11528 elf_gp (isec->owner) = off;
11529
11530 return TRUE;
11531 }
11532
11533 /* Called via elf_link_hash_traverse to merge GOT entries for global
11534 symbol H. */
11535
11536 static bfd_boolean
11537 merge_global_got (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
11538 {
11539 if (h->root.type == bfd_link_hash_indirect)
11540 return TRUE;
11541
11542 merge_got_entries (&h->got.glist);
11543
11544 return TRUE;
11545 }
11546
11547 /* Called via elf_link_hash_traverse to allocate GOT entries for global
11548 symbol H. */
11549
11550 static bfd_boolean
11551 reallocate_got (struct elf_link_hash_entry *h, void *inf)
11552 {
11553 struct got_entry *gent;
11554
11555 if (h->root.type == bfd_link_hash_indirect)
11556 return TRUE;
11557
11558 for (gent = h->got.glist; gent != NULL; gent = gent->next)
11559 if (!gent->is_indirect)
11560 allocate_got (h, (struct bfd_link_info *) inf, gent);
11561 return TRUE;
11562 }
11563
11564 /* Called on the first multitoc pass after the last call to
11565 ppc64_elf_next_toc_section. This function removes duplicate GOT
11566 entries. */
11567
11568 bfd_boolean
11569 ppc64_elf_layout_multitoc (struct bfd_link_info *info)
11570 {
11571 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11572 struct bfd *ibfd, *ibfd2;
11573 bfd_boolean done_something;
11574
11575 htab->multi_toc_needed = htab->toc_curr != elf_gp (info->output_bfd);
11576
11577 if (!htab->do_multi_toc)
11578 return FALSE;
11579
11580 /* Merge global sym got entries within a toc group. */
11581 elf_link_hash_traverse (&htab->elf, merge_global_got, info);
11582
11583 /* And tlsld_got. */
11584 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11585 {
11586 struct got_entry *ent, *ent2;
11587
11588 if (!is_ppc64_elf (ibfd))
11589 continue;
11590
11591 ent = ppc64_tlsld_got (ibfd);
11592 if (!ent->is_indirect
11593 && ent->got.offset != (bfd_vma) -1)
11594 {
11595 for (ibfd2 = ibfd->link.next; ibfd2 != NULL; ibfd2 = ibfd2->link.next)
11596 {
11597 if (!is_ppc64_elf (ibfd2))
11598 continue;
11599
11600 ent2 = ppc64_tlsld_got (ibfd2);
11601 if (!ent2->is_indirect
11602 && ent2->got.offset != (bfd_vma) -1
11603 && elf_gp (ibfd2) == elf_gp (ibfd))
11604 {
11605 ent2->is_indirect = TRUE;
11606 ent2->got.ent = ent;
11607 }
11608 }
11609 }
11610 }
11611
11612 /* Zap sizes of got sections. */
11613 htab->elf.irelplt->rawsize = htab->elf.irelplt->size;
11614 htab->elf.irelplt->size -= htab->got_reli_size;
11615 htab->got_reli_size = 0;
11616
11617 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11618 {
11619 asection *got, *relgot;
11620
11621 if (!is_ppc64_elf (ibfd))
11622 continue;
11623
11624 got = ppc64_elf_tdata (ibfd)->got;
11625 if (got != NULL)
11626 {
11627 got->rawsize = got->size;
11628 got->size = 0;
11629 relgot = ppc64_elf_tdata (ibfd)->relgot;
11630 relgot->rawsize = relgot->size;
11631 relgot->size = 0;
11632 }
11633 }
11634
11635 /* Now reallocate the got, local syms first. We don't need to
11636 allocate section contents again since we never increase size. */
11637 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11638 {
11639 struct got_entry **lgot_ents;
11640 struct got_entry **end_lgot_ents;
11641 struct plt_entry **local_plt;
11642 struct plt_entry **end_local_plt;
11643 unsigned char *lgot_masks;
11644 bfd_size_type locsymcount;
11645 Elf_Internal_Shdr *symtab_hdr;
11646 asection *s;
11647
11648 if (!is_ppc64_elf (ibfd))
11649 continue;
11650
11651 lgot_ents = elf_local_got_ents (ibfd);
11652 if (!lgot_ents)
11653 continue;
11654
11655 symtab_hdr = &elf_symtab_hdr (ibfd);
11656 locsymcount = symtab_hdr->sh_info;
11657 end_lgot_ents = lgot_ents + locsymcount;
11658 local_plt = (struct plt_entry **) end_lgot_ents;
11659 end_local_plt = local_plt + locsymcount;
11660 lgot_masks = (unsigned char *) end_local_plt;
11661 s = ppc64_elf_tdata (ibfd)->got;
11662 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
11663 {
11664 struct got_entry *ent;
11665
11666 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
11667 {
11668 unsigned int ent_size = 8;
11669 unsigned int rel_size = sizeof (Elf64_External_Rela);
11670
11671 ent->got.offset = s->size;
11672 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
11673 {
11674 ent_size *= 2;
11675 rel_size *= 2;
11676 }
11677 s->size += ent_size;
11678 if ((*lgot_masks & PLT_IFUNC) != 0)
11679 {
11680 htab->elf.irelplt->size += rel_size;
11681 htab->got_reli_size += rel_size;
11682 }
11683 else if (bfd_link_pic (info))
11684 {
11685 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
11686 srel->size += rel_size;
11687 }
11688 }
11689 }
11690 }
11691
11692 elf_link_hash_traverse (&htab->elf, reallocate_got, info);
11693
11694 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11695 {
11696 struct got_entry *ent;
11697
11698 if (!is_ppc64_elf (ibfd))
11699 continue;
11700
11701 ent = ppc64_tlsld_got (ibfd);
11702 if (!ent->is_indirect
11703 && ent->got.offset != (bfd_vma) -1)
11704 {
11705 asection *s = ppc64_elf_tdata (ibfd)->got;
11706 ent->got.offset = s->size;
11707 s->size += 16;
11708 if (bfd_link_pic (info))
11709 {
11710 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
11711 srel->size += sizeof (Elf64_External_Rela);
11712 }
11713 }
11714 }
11715
11716 done_something = htab->elf.irelplt->rawsize != htab->elf.irelplt->size;
11717 if (!done_something)
11718 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11719 {
11720 asection *got;
11721
11722 if (!is_ppc64_elf (ibfd))
11723 continue;
11724
11725 got = ppc64_elf_tdata (ibfd)->got;
11726 if (got != NULL)
11727 {
11728 done_something = got->rawsize != got->size;
11729 if (done_something)
11730 break;
11731 }
11732 }
11733
11734 if (done_something)
11735 (*htab->params->layout_sections_again) ();
11736
11737 /* Set up for second pass over toc sections to recalculate elf_gp
11738 on input sections. */
11739 htab->toc_bfd = NULL;
11740 htab->toc_first_sec = NULL;
11741 htab->second_toc_pass = TRUE;
11742 return done_something;
11743 }
11744
11745 /* Called after second pass of multitoc partitioning. */
11746
11747 void
11748 ppc64_elf_finish_multitoc_partition (struct bfd_link_info *info)
11749 {
11750 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11751
11752 /* After the second pass, toc_curr tracks the TOC offset used
11753 for code sections below in ppc64_elf_next_input_section. */
11754 htab->toc_curr = TOC_BASE_OFF;
11755 }
11756
11757 /* No toc references were found in ISEC. If the code in ISEC makes no
11758 calls, then there's no need to use toc adjusting stubs when branching
11759 into ISEC. Actually, indirect calls from ISEC are OK as they will
11760 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
11761 needed, and 2 if a cyclical call-graph was found but no other reason
11762 for a stub was detected. If called from the top level, a return of
11763 2 means the same as a return of 0. */
11764
11765 static int
11766 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
11767 {
11768 int ret;
11769
11770 /* Mark this section as checked. */
11771 isec->call_check_done = 1;
11772
11773 /* We know none of our code bearing sections will need toc stubs. */
11774 if ((isec->flags & SEC_LINKER_CREATED) != 0)
11775 return 0;
11776
11777 if (isec->size == 0)
11778 return 0;
11779
11780 if (isec->output_section == NULL)
11781 return 0;
11782
11783 ret = 0;
11784 if (isec->reloc_count != 0)
11785 {
11786 Elf_Internal_Rela *relstart, *rel;
11787 Elf_Internal_Sym *local_syms;
11788 struct ppc_link_hash_table *htab;
11789
11790 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
11791 info->keep_memory);
11792 if (relstart == NULL)
11793 return -1;
11794
11795 /* Look for branches to outside of this section. */
11796 local_syms = NULL;
11797 htab = ppc_hash_table (info);
11798 if (htab == NULL)
11799 return -1;
11800
11801 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
11802 {
11803 enum elf_ppc64_reloc_type r_type;
11804 unsigned long r_symndx;
11805 struct elf_link_hash_entry *h;
11806 struct ppc_link_hash_entry *eh;
11807 Elf_Internal_Sym *sym;
11808 asection *sym_sec;
11809 struct _opd_sec_data *opd;
11810 bfd_vma sym_value;
11811 bfd_vma dest;
11812
11813 r_type = ELF64_R_TYPE (rel->r_info);
11814 if (r_type != R_PPC64_REL24
11815 && r_type != R_PPC64_REL14
11816 && r_type != R_PPC64_REL14_BRTAKEN
11817 && r_type != R_PPC64_REL14_BRNTAKEN)
11818 continue;
11819
11820 r_symndx = ELF64_R_SYM (rel->r_info);
11821 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
11822 isec->owner))
11823 {
11824 ret = -1;
11825 break;
11826 }
11827
11828 /* Calls to dynamic lib functions go through a plt call stub
11829 that uses r2. */
11830 eh = (struct ppc_link_hash_entry *) h;
11831 if (eh != NULL
11832 && (eh->elf.plt.plist != NULL
11833 || (eh->oh != NULL
11834 && ppc_follow_link (eh->oh)->elf.plt.plist != NULL)))
11835 {
11836 ret = 1;
11837 break;
11838 }
11839
11840 if (sym_sec == NULL)
11841 /* Ignore other undefined symbols. */
11842 continue;
11843
11844 /* Assume branches to other sections not included in the
11845 link need stubs too, to cover -R and absolute syms. */
11846 if (sym_sec->output_section == NULL)
11847 {
11848 ret = 1;
11849 break;
11850 }
11851
11852 if (h == NULL)
11853 sym_value = sym->st_value;
11854 else
11855 {
11856 if (h->root.type != bfd_link_hash_defined
11857 && h->root.type != bfd_link_hash_defweak)
11858 abort ();
11859 sym_value = h->root.u.def.value;
11860 }
11861 sym_value += rel->r_addend;
11862
11863 /* If this branch reloc uses an opd sym, find the code section. */
11864 opd = get_opd_info (sym_sec);
11865 if (opd != NULL)
11866 {
11867 if (h == NULL && opd->adjust != NULL)
11868 {
11869 long adjust;
11870
11871 adjust = opd->adjust[OPD_NDX (sym_value)];
11872 if (adjust == -1)
11873 /* Assume deleted functions won't ever be called. */
11874 continue;
11875 sym_value += adjust;
11876 }
11877
11878 dest = opd_entry_value (sym_sec, sym_value,
11879 &sym_sec, NULL, FALSE);
11880 if (dest == (bfd_vma) -1)
11881 continue;
11882 }
11883 else
11884 dest = (sym_value
11885 + sym_sec->output_offset
11886 + sym_sec->output_section->vma);
11887
11888 /* Ignore branch to self. */
11889 if (sym_sec == isec)
11890 continue;
11891
11892 /* If the called function uses the toc, we need a stub. */
11893 if (sym_sec->has_toc_reloc
11894 || sym_sec->makes_toc_func_call)
11895 {
11896 ret = 1;
11897 break;
11898 }
11899
11900 /* Assume any branch that needs a long branch stub might in fact
11901 need a plt_branch stub. A plt_branch stub uses r2. */
11902 else if (dest - (isec->output_offset
11903 + isec->output_section->vma
11904 + rel->r_offset) + (1 << 25)
11905 >= (2u << 25) - PPC64_LOCAL_ENTRY_OFFSET (h
11906 ? h->other
11907 : sym->st_other))
11908 {
11909 ret = 1;
11910 break;
11911 }
11912
11913 /* If calling back to a section in the process of being
11914 tested, we can't say for sure that no toc adjusting stubs
11915 are needed, so don't return zero. */
11916 else if (sym_sec->call_check_in_progress)
11917 ret = 2;
11918
11919 /* Branches to another section that itself doesn't have any TOC
11920 references are OK. Recursively call ourselves to check. */
11921 else if (!sym_sec->call_check_done)
11922 {
11923 int recur;
11924
11925 /* Mark current section as indeterminate, so that other
11926 sections that call back to current won't be marked as
11927 known. */
11928 isec->call_check_in_progress = 1;
11929 recur = toc_adjusting_stub_needed (info, sym_sec);
11930 isec->call_check_in_progress = 0;
11931
11932 if (recur != 0)
11933 {
11934 ret = recur;
11935 if (recur != 2)
11936 break;
11937 }
11938 }
11939 }
11940
11941 if (local_syms != NULL
11942 && (elf_symtab_hdr (isec->owner).contents
11943 != (unsigned char *) local_syms))
11944 free (local_syms);
11945 if (elf_section_data (isec)->relocs != relstart)
11946 free (relstart);
11947 }
11948
11949 if ((ret & 1) == 0
11950 && isec->map_head.s != NULL
11951 && (strcmp (isec->output_section->name, ".init") == 0
11952 || strcmp (isec->output_section->name, ".fini") == 0))
11953 {
11954 if (isec->map_head.s->has_toc_reloc
11955 || isec->map_head.s->makes_toc_func_call)
11956 ret = 1;
11957 else if (!isec->map_head.s->call_check_done)
11958 {
11959 int recur;
11960 isec->call_check_in_progress = 1;
11961 recur = toc_adjusting_stub_needed (info, isec->map_head.s);
11962 isec->call_check_in_progress = 0;
11963 if (recur != 0)
11964 ret = recur;
11965 }
11966 }
11967
11968 if (ret == 1)
11969 isec->makes_toc_func_call = 1;
11970
11971 return ret;
11972 }
11973
11974 /* The linker repeatedly calls this function for each input section,
11975 in the order that input sections are linked into output sections.
11976 Build lists of input sections to determine groupings between which
11977 we may insert linker stubs. */
11978
11979 bfd_boolean
11980 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
11981 {
11982 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11983
11984 if (htab == NULL)
11985 return FALSE;
11986
11987 if ((isec->output_section->flags & SEC_CODE) != 0
11988 && isec->output_section->id < htab->sec_info_arr_size)
11989 {
11990 /* This happens to make the list in reverse order,
11991 which is what we want. */
11992 htab->sec_info[isec->id].u.list
11993 = htab->sec_info[isec->output_section->id].u.list;
11994 htab->sec_info[isec->output_section->id].u.list = isec;
11995 }
11996
11997 if (htab->multi_toc_needed)
11998 {
11999 /* Analyse sections that aren't already flagged as needing a
12000 valid toc pointer. Exclude .fixup for the linux kernel.
12001 .fixup contains branches, but only back to the function that
12002 hit an exception. */
12003 if (!(isec->has_toc_reloc
12004 || (isec->flags & SEC_CODE) == 0
12005 || strcmp (isec->name, ".fixup") == 0
12006 || isec->call_check_done))
12007 {
12008 if (toc_adjusting_stub_needed (info, isec) < 0)
12009 return FALSE;
12010 }
12011 /* Make all sections use the TOC assigned for this object file.
12012 This will be wrong for pasted sections; We fix that in
12013 check_pasted_section(). */
12014 if (elf_gp (isec->owner) != 0)
12015 htab->toc_curr = elf_gp (isec->owner);
12016 }
12017
12018 htab->sec_info[isec->id].toc_off = htab->toc_curr;
12019 return TRUE;
12020 }
12021
12022 /* Check that all .init and .fini sections use the same toc, if they
12023 have toc relocs. */
12024
12025 static bfd_boolean
12026 check_pasted_section (struct bfd_link_info *info, const char *name)
12027 {
12028 asection *o = bfd_get_section_by_name (info->output_bfd, name);
12029
12030 if (o != NULL)
12031 {
12032 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12033 bfd_vma toc_off = 0;
12034 asection *i;
12035
12036 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
12037 if (i->has_toc_reloc)
12038 {
12039 if (toc_off == 0)
12040 toc_off = htab->sec_info[i->id].toc_off;
12041 else if (toc_off != htab->sec_info[i->id].toc_off)
12042 return FALSE;
12043 }
12044
12045 if (toc_off == 0)
12046 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
12047 if (i->makes_toc_func_call)
12048 {
12049 toc_off = htab->sec_info[i->id].toc_off;
12050 break;
12051 }
12052
12053 /* Make sure the whole pasted function uses the same toc offset. */
12054 if (toc_off != 0)
12055 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
12056 htab->sec_info[i->id].toc_off = toc_off;
12057 }
12058 return TRUE;
12059 }
12060
12061 bfd_boolean
12062 ppc64_elf_check_init_fini (struct bfd_link_info *info)
12063 {
12064 return (check_pasted_section (info, ".init")
12065 & check_pasted_section (info, ".fini"));
12066 }
12067
12068 /* See whether we can group stub sections together. Grouping stub
12069 sections may result in fewer stubs. More importantly, we need to
12070 put all .init* and .fini* stubs at the beginning of the .init or
12071 .fini output sections respectively, because glibc splits the
12072 _init and _fini functions into multiple parts. Putting a stub in
12073 the middle of a function is not a good idea. */
12074
12075 static bfd_boolean
12076 group_sections (struct bfd_link_info *info,
12077 bfd_size_type stub_group_size,
12078 bfd_boolean stubs_always_before_branch)
12079 {
12080 struct ppc_link_hash_table *htab;
12081 asection *osec;
12082 bfd_boolean suppress_size_errors;
12083
12084 htab = ppc_hash_table (info);
12085 if (htab == NULL)
12086 return FALSE;
12087
12088 suppress_size_errors = FALSE;
12089 if (stub_group_size == 1)
12090 {
12091 /* Default values. */
12092 if (stubs_always_before_branch)
12093 stub_group_size = 0x1e00000;
12094 else
12095 stub_group_size = 0x1c00000;
12096 suppress_size_errors = TRUE;
12097 }
12098
12099 for (osec = info->output_bfd->sections; osec != NULL; osec = osec->next)
12100 {
12101 asection *tail;
12102
12103 if (osec->id >= htab->sec_info_arr_size)
12104 continue;
12105
12106 tail = htab->sec_info[osec->id].u.list;
12107 while (tail != NULL)
12108 {
12109 asection *curr;
12110 asection *prev;
12111 bfd_size_type total;
12112 bfd_boolean big_sec;
12113 bfd_vma curr_toc;
12114 struct map_stub *group;
12115 bfd_size_type group_size;
12116
12117 curr = tail;
12118 total = tail->size;
12119 group_size = (ppc64_elf_section_data (tail) != NULL
12120 && ppc64_elf_section_data (tail)->has_14bit_branch
12121 ? stub_group_size >> 10 : stub_group_size);
12122
12123 big_sec = total > group_size;
12124 if (big_sec && !suppress_size_errors)
12125 /* xgettext:c-format */
12126 _bfd_error_handler (_("%B section %A exceeds stub group size"),
12127 tail->owner, tail);
12128 curr_toc = htab->sec_info[tail->id].toc_off;
12129
12130 while ((prev = htab->sec_info[curr->id].u.list) != NULL
12131 && ((total += curr->output_offset - prev->output_offset)
12132 < (ppc64_elf_section_data (prev) != NULL
12133 && ppc64_elf_section_data (prev)->has_14bit_branch
12134 ? (group_size = stub_group_size >> 10) : group_size))
12135 && htab->sec_info[prev->id].toc_off == curr_toc)
12136 curr = prev;
12137
12138 /* OK, the size from the start of CURR to the end is less
12139 than group_size and thus can be handled by one stub
12140 section. (or the tail section is itself larger than
12141 group_size, in which case we may be toast.) We should
12142 really be keeping track of the total size of stubs added
12143 here, as stubs contribute to the final output section
12144 size. That's a little tricky, and this way will only
12145 break if stubs added make the total size more than 2^25,
12146 ie. for the default stub_group_size, if stubs total more
12147 than 2097152 bytes, or nearly 75000 plt call stubs. */
12148 group = bfd_alloc (curr->owner, sizeof (*group));
12149 if (group == NULL)
12150 return FALSE;
12151 group->link_sec = curr;
12152 group->stub_sec = NULL;
12153 group->needs_save_res = 0;
12154 group->tls_get_addr_opt_bctrl = -1u;
12155 group->next = htab->group;
12156 htab->group = group;
12157 do
12158 {
12159 prev = htab->sec_info[tail->id].u.list;
12160 /* Set up this stub group. */
12161 htab->sec_info[tail->id].u.group = group;
12162 }
12163 while (tail != curr && (tail = prev) != NULL);
12164
12165 /* But wait, there's more! Input sections up to group_size
12166 bytes before the stub section can be handled by it too.
12167 Don't do this if we have a really large section after the
12168 stubs, as adding more stubs increases the chance that
12169 branches may not reach into the stub section. */
12170 if (!stubs_always_before_branch && !big_sec)
12171 {
12172 total = 0;
12173 while (prev != NULL
12174 && ((total += tail->output_offset - prev->output_offset)
12175 < (ppc64_elf_section_data (prev) != NULL
12176 && ppc64_elf_section_data (prev)->has_14bit_branch
12177 ? (group_size = stub_group_size >> 10) : group_size))
12178 && htab->sec_info[prev->id].toc_off == curr_toc)
12179 {
12180 tail = prev;
12181 prev = htab->sec_info[tail->id].u.list;
12182 htab->sec_info[tail->id].u.group = group;
12183 }
12184 }
12185 tail = prev;
12186 }
12187 }
12188 return TRUE;
12189 }
12190
12191 static const unsigned char glink_eh_frame_cie[] =
12192 {
12193 0, 0, 0, 16, /* length. */
12194 0, 0, 0, 0, /* id. */
12195 1, /* CIE version. */
12196 'z', 'R', 0, /* Augmentation string. */
12197 4, /* Code alignment. */
12198 0x78, /* Data alignment. */
12199 65, /* RA reg. */
12200 1, /* Augmentation size. */
12201 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
12202 DW_CFA_def_cfa, 1, 0 /* def_cfa: r1 offset 0. */
12203 };
12204
12205 static size_t
12206 stub_eh_frame_size (struct map_stub *group, size_t align)
12207 {
12208 size_t this_size = 17;
12209 if (group->tls_get_addr_opt_bctrl != -1u)
12210 {
12211 unsigned int to_bctrl = group->tls_get_addr_opt_bctrl / 4;
12212 if (to_bctrl < 64)
12213 this_size += 1;
12214 else if (to_bctrl < 256)
12215 this_size += 2;
12216 else if (to_bctrl < 65536)
12217 this_size += 3;
12218 else
12219 this_size += 5;
12220 this_size += 6;
12221 }
12222 this_size = (this_size + align - 1) & -align;
12223 return this_size;
12224 }
12225
12226 /* Stripping output sections is normally done before dynamic section
12227 symbols have been allocated. This function is called later, and
12228 handles cases like htab->brlt which is mapped to its own output
12229 section. */
12230
12231 static void
12232 maybe_strip_output (struct bfd_link_info *info, asection *isec)
12233 {
12234 if (isec->size == 0
12235 && isec->output_section->size == 0
12236 && !(isec->output_section->flags & SEC_KEEP)
12237 && !bfd_section_removed_from_list (info->output_bfd,
12238 isec->output_section)
12239 && elf_section_data (isec->output_section)->dynindx == 0)
12240 {
12241 isec->output_section->flags |= SEC_EXCLUDE;
12242 bfd_section_list_remove (info->output_bfd, isec->output_section);
12243 info->output_bfd->section_count--;
12244 }
12245 }
12246
12247 /* Determine and set the size of the stub section for a final link.
12248
12249 The basic idea here is to examine all the relocations looking for
12250 PC-relative calls to a target that is unreachable with a "bl"
12251 instruction. */
12252
12253 bfd_boolean
12254 ppc64_elf_size_stubs (struct bfd_link_info *info)
12255 {
12256 bfd_size_type stub_group_size;
12257 bfd_boolean stubs_always_before_branch;
12258 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12259
12260 if (htab == NULL)
12261 return FALSE;
12262
12263 if (htab->params->plt_thread_safe == -1 && !bfd_link_executable (info))
12264 htab->params->plt_thread_safe = 1;
12265 if (!htab->opd_abi)
12266 htab->params->plt_thread_safe = 0;
12267 else if (htab->params->plt_thread_safe == -1)
12268 {
12269 static const char *const thread_starter[] =
12270 {
12271 "pthread_create",
12272 /* libstdc++ */
12273 "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE",
12274 /* librt */
12275 "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio",
12276 "mq_notify", "create_timer",
12277 /* libanl */
12278 "getaddrinfo_a",
12279 /* libgomp */
12280 "GOMP_parallel",
12281 "GOMP_parallel_start",
12282 "GOMP_parallel_loop_static",
12283 "GOMP_parallel_loop_static_start",
12284 "GOMP_parallel_loop_dynamic",
12285 "GOMP_parallel_loop_dynamic_start",
12286 "GOMP_parallel_loop_guided",
12287 "GOMP_parallel_loop_guided_start",
12288 "GOMP_parallel_loop_runtime",
12289 "GOMP_parallel_loop_runtime_start",
12290 "GOMP_parallel_sections",
12291 "GOMP_parallel_sections_start",
12292 /* libgo */
12293 "__go_go",
12294 };
12295 unsigned i;
12296
12297 for (i = 0; i < ARRAY_SIZE (thread_starter); i++)
12298 {
12299 struct elf_link_hash_entry *h;
12300 h = elf_link_hash_lookup (&htab->elf, thread_starter[i],
12301 FALSE, FALSE, TRUE);
12302 htab->params->plt_thread_safe = h != NULL && h->ref_regular;
12303 if (htab->params->plt_thread_safe)
12304 break;
12305 }
12306 }
12307 stubs_always_before_branch = htab->params->group_size < 0;
12308 if (htab->params->group_size < 0)
12309 stub_group_size = -htab->params->group_size;
12310 else
12311 stub_group_size = htab->params->group_size;
12312
12313 if (!group_sections (info, stub_group_size, stubs_always_before_branch))
12314 return FALSE;
12315
12316 #define STUB_SHRINK_ITER 20
12317 /* Loop until no stubs added. After iteration 20 of this loop we may
12318 exit on a stub section shrinking. This is to break out of a
12319 pathological case where adding stubs on one iteration decreases
12320 section gaps (perhaps due to alignment), which then requires
12321 fewer or smaller stubs on the next iteration. */
12322
12323 while (1)
12324 {
12325 bfd *input_bfd;
12326 unsigned int bfd_indx;
12327 struct map_stub *group;
12328
12329 htab->stub_iteration += 1;
12330
12331 for (input_bfd = info->input_bfds, bfd_indx = 0;
12332 input_bfd != NULL;
12333 input_bfd = input_bfd->link.next, bfd_indx++)
12334 {
12335 Elf_Internal_Shdr *symtab_hdr;
12336 asection *section;
12337 Elf_Internal_Sym *local_syms = NULL;
12338
12339 if (!is_ppc64_elf (input_bfd))
12340 continue;
12341
12342 /* We'll need the symbol table in a second. */
12343 symtab_hdr = &elf_symtab_hdr (input_bfd);
12344 if (symtab_hdr->sh_info == 0)
12345 continue;
12346
12347 /* Walk over each section attached to the input bfd. */
12348 for (section = input_bfd->sections;
12349 section != NULL;
12350 section = section->next)
12351 {
12352 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
12353
12354 /* If there aren't any relocs, then there's nothing more
12355 to do. */
12356 if ((section->flags & SEC_RELOC) == 0
12357 || (section->flags & SEC_ALLOC) == 0
12358 || (section->flags & SEC_LOAD) == 0
12359 || (section->flags & SEC_CODE) == 0
12360 || section->reloc_count == 0)
12361 continue;
12362
12363 /* If this section is a link-once section that will be
12364 discarded, then don't create any stubs. */
12365 if (section->output_section == NULL
12366 || section->output_section->owner != info->output_bfd)
12367 continue;
12368
12369 /* Get the relocs. */
12370 internal_relocs
12371 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
12372 info->keep_memory);
12373 if (internal_relocs == NULL)
12374 goto error_ret_free_local;
12375
12376 /* Now examine each relocation. */
12377 irela = internal_relocs;
12378 irelaend = irela + section->reloc_count;
12379 for (; irela < irelaend; irela++)
12380 {
12381 enum elf_ppc64_reloc_type r_type;
12382 unsigned int r_indx;
12383 enum ppc_stub_type stub_type;
12384 struct ppc_stub_hash_entry *stub_entry;
12385 asection *sym_sec, *code_sec;
12386 bfd_vma sym_value, code_value;
12387 bfd_vma destination;
12388 unsigned long local_off;
12389 bfd_boolean ok_dest;
12390 struct ppc_link_hash_entry *hash;
12391 struct ppc_link_hash_entry *fdh;
12392 struct elf_link_hash_entry *h;
12393 Elf_Internal_Sym *sym;
12394 char *stub_name;
12395 const asection *id_sec;
12396 struct _opd_sec_data *opd;
12397 struct plt_entry *plt_ent;
12398
12399 r_type = ELF64_R_TYPE (irela->r_info);
12400 r_indx = ELF64_R_SYM (irela->r_info);
12401
12402 if (r_type >= R_PPC64_max)
12403 {
12404 bfd_set_error (bfd_error_bad_value);
12405 goto error_ret_free_internal;
12406 }
12407
12408 /* Only look for stubs on branch instructions. */
12409 if (r_type != R_PPC64_REL24
12410 && r_type != R_PPC64_REL14
12411 && r_type != R_PPC64_REL14_BRTAKEN
12412 && r_type != R_PPC64_REL14_BRNTAKEN)
12413 continue;
12414
12415 /* Now determine the call target, its name, value,
12416 section. */
12417 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
12418 r_indx, input_bfd))
12419 goto error_ret_free_internal;
12420 hash = (struct ppc_link_hash_entry *) h;
12421
12422 ok_dest = FALSE;
12423 fdh = NULL;
12424 sym_value = 0;
12425 if (hash == NULL)
12426 {
12427 sym_value = sym->st_value;
12428 if (sym_sec != NULL
12429 && sym_sec->output_section != NULL)
12430 ok_dest = TRUE;
12431 }
12432 else if (hash->elf.root.type == bfd_link_hash_defined
12433 || hash->elf.root.type == bfd_link_hash_defweak)
12434 {
12435 sym_value = hash->elf.root.u.def.value;
12436 if (sym_sec->output_section != NULL)
12437 ok_dest = TRUE;
12438 }
12439 else if (hash->elf.root.type == bfd_link_hash_undefweak
12440 || hash->elf.root.type == bfd_link_hash_undefined)
12441 {
12442 /* Recognise an old ABI func code entry sym, and
12443 use the func descriptor sym instead if it is
12444 defined. */
12445 if (hash->elf.root.root.string[0] == '.'
12446 && hash->oh != NULL)
12447 {
12448 fdh = ppc_follow_link (hash->oh);
12449 if (fdh->elf.root.type == bfd_link_hash_defined
12450 || fdh->elf.root.type == bfd_link_hash_defweak)
12451 {
12452 sym_sec = fdh->elf.root.u.def.section;
12453 sym_value = fdh->elf.root.u.def.value;
12454 if (sym_sec->output_section != NULL)
12455 ok_dest = TRUE;
12456 }
12457 else
12458 fdh = NULL;
12459 }
12460 }
12461 else
12462 {
12463 bfd_set_error (bfd_error_bad_value);
12464 goto error_ret_free_internal;
12465 }
12466
12467 destination = 0;
12468 local_off = 0;
12469 if (ok_dest)
12470 {
12471 sym_value += irela->r_addend;
12472 destination = (sym_value
12473 + sym_sec->output_offset
12474 + sym_sec->output_section->vma);
12475 local_off = PPC64_LOCAL_ENTRY_OFFSET (hash
12476 ? hash->elf.other
12477 : sym->st_other);
12478 }
12479
12480 code_sec = sym_sec;
12481 code_value = sym_value;
12482 opd = get_opd_info (sym_sec);
12483 if (opd != NULL)
12484 {
12485 bfd_vma dest;
12486
12487 if (hash == NULL && opd->adjust != NULL)
12488 {
12489 long adjust = opd->adjust[OPD_NDX (sym_value)];
12490 if (adjust == -1)
12491 continue;
12492 code_value += adjust;
12493 sym_value += adjust;
12494 }
12495 dest = opd_entry_value (sym_sec, sym_value,
12496 &code_sec, &code_value, FALSE);
12497 if (dest != (bfd_vma) -1)
12498 {
12499 destination = dest;
12500 if (fdh != NULL)
12501 {
12502 /* Fixup old ABI sym to point at code
12503 entry. */
12504 hash->elf.root.type = bfd_link_hash_defweak;
12505 hash->elf.root.u.def.section = code_sec;
12506 hash->elf.root.u.def.value = code_value;
12507 }
12508 }
12509 }
12510
12511 /* Determine what (if any) linker stub is needed. */
12512 plt_ent = NULL;
12513 stub_type = ppc_type_of_stub (section, irela, &hash,
12514 &plt_ent, destination,
12515 local_off);
12516
12517 if (stub_type != ppc_stub_plt_call)
12518 {
12519 /* Check whether we need a TOC adjusting stub.
12520 Since the linker pastes together pieces from
12521 different object files when creating the
12522 _init and _fini functions, it may be that a
12523 call to what looks like a local sym is in
12524 fact a call needing a TOC adjustment. */
12525 if (code_sec != NULL
12526 && code_sec->output_section != NULL
12527 && (htab->sec_info[code_sec->id].toc_off
12528 != htab->sec_info[section->id].toc_off)
12529 && (code_sec->has_toc_reloc
12530 || code_sec->makes_toc_func_call))
12531 stub_type = ppc_stub_long_branch_r2off;
12532 }
12533
12534 if (stub_type == ppc_stub_none)
12535 continue;
12536
12537 /* __tls_get_addr calls might be eliminated. */
12538 if (stub_type != ppc_stub_plt_call
12539 && hash != NULL
12540 && (hash == htab->tls_get_addr
12541 || hash == htab->tls_get_addr_fd)
12542 && section->has_tls_reloc
12543 && irela != internal_relocs)
12544 {
12545 /* Get tls info. */
12546 unsigned char *tls_mask;
12547
12548 if (!get_tls_mask (&tls_mask, NULL, NULL, &local_syms,
12549 irela - 1, input_bfd))
12550 goto error_ret_free_internal;
12551 if (*tls_mask != 0)
12552 continue;
12553 }
12554
12555 if (stub_type == ppc_stub_plt_call)
12556 {
12557 if (!htab->opd_abi
12558 && htab->params->plt_localentry0 != 0
12559 && is_elfv2_localentry0 (&hash->elf))
12560 htab->has_plt_localentry0 = 1;
12561 else if (irela + 1 < irelaend
12562 && irela[1].r_offset == irela->r_offset + 4
12563 && (ELF64_R_TYPE (irela[1].r_info)
12564 == R_PPC64_TOCSAVE))
12565 {
12566 if (!tocsave_find (htab, INSERT,
12567 &local_syms, irela + 1, input_bfd))
12568 goto error_ret_free_internal;
12569 }
12570 else
12571 stub_type = ppc_stub_plt_call_r2save;
12572 }
12573
12574 /* Support for grouping stub sections. */
12575 id_sec = htab->sec_info[section->id].u.group->link_sec;
12576
12577 /* Get the name of this stub. */
12578 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
12579 if (!stub_name)
12580 goto error_ret_free_internal;
12581
12582 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
12583 stub_name, FALSE, FALSE);
12584 if (stub_entry != NULL)
12585 {
12586 /* The proper stub has already been created. */
12587 free (stub_name);
12588 if (stub_type == ppc_stub_plt_call_r2save)
12589 stub_entry->stub_type = stub_type;
12590 continue;
12591 }
12592
12593 stub_entry = ppc_add_stub (stub_name, section, info);
12594 if (stub_entry == NULL)
12595 {
12596 free (stub_name);
12597 error_ret_free_internal:
12598 if (elf_section_data (section)->relocs == NULL)
12599 free (internal_relocs);
12600 error_ret_free_local:
12601 if (local_syms != NULL
12602 && (symtab_hdr->contents
12603 != (unsigned char *) local_syms))
12604 free (local_syms);
12605 return FALSE;
12606 }
12607
12608 stub_entry->stub_type = stub_type;
12609 if (stub_type != ppc_stub_plt_call
12610 && stub_type != ppc_stub_plt_call_r2save)
12611 {
12612 stub_entry->target_value = code_value;
12613 stub_entry->target_section = code_sec;
12614 }
12615 else
12616 {
12617 stub_entry->target_value = sym_value;
12618 stub_entry->target_section = sym_sec;
12619 }
12620 stub_entry->h = hash;
12621 stub_entry->plt_ent = plt_ent;
12622 stub_entry->other = hash ? hash->elf.other : sym->st_other;
12623
12624 if (stub_entry->h != NULL)
12625 htab->stub_globals += 1;
12626 }
12627
12628 /* We're done with the internal relocs, free them. */
12629 if (elf_section_data (section)->relocs != internal_relocs)
12630 free (internal_relocs);
12631 }
12632
12633 if (local_syms != NULL
12634 && symtab_hdr->contents != (unsigned char *) local_syms)
12635 {
12636 if (!info->keep_memory)
12637 free (local_syms);
12638 else
12639 symtab_hdr->contents = (unsigned char *) local_syms;
12640 }
12641 }
12642
12643 /* We may have added some stubs. Find out the new size of the
12644 stub sections. */
12645 for (group = htab->group; group != NULL; group = group->next)
12646 if (group->stub_sec != NULL)
12647 {
12648 asection *stub_sec = group->stub_sec;
12649
12650 if (htab->stub_iteration <= STUB_SHRINK_ITER
12651 || stub_sec->rawsize < stub_sec->size)
12652 /* Past STUB_SHRINK_ITER, rawsize is the max size seen. */
12653 stub_sec->rawsize = stub_sec->size;
12654 stub_sec->size = 0;
12655 stub_sec->reloc_count = 0;
12656 stub_sec->flags &= ~SEC_RELOC;
12657 }
12658
12659 htab->brlt->size = 0;
12660 htab->brlt->reloc_count = 0;
12661 htab->brlt->flags &= ~SEC_RELOC;
12662 if (htab->relbrlt != NULL)
12663 htab->relbrlt->size = 0;
12664
12665 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
12666
12667 for (group = htab->group; group != NULL; group = group->next)
12668 if (group->needs_save_res)
12669 group->stub_sec->size += htab->sfpr->size;
12670
12671 if (info->emitrelocations
12672 && htab->glink != NULL && htab->glink->size != 0)
12673 {
12674 htab->glink->reloc_count = 1;
12675 htab->glink->flags |= SEC_RELOC;
12676 }
12677
12678 if (htab->glink_eh_frame != NULL
12679 && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
12680 && htab->glink_eh_frame->output_section->size != 0)
12681 {
12682 size_t size = 0, align = 4;
12683
12684 for (group = htab->group; group != NULL; group = group->next)
12685 if (group->stub_sec != NULL)
12686 size += stub_eh_frame_size (group, align);
12687 if (htab->glink != NULL && htab->glink->size != 0)
12688 size += (24 + align - 1) & -align;
12689 if (size != 0)
12690 size += (sizeof (glink_eh_frame_cie) + align - 1) & -align;
12691 align = 1ul << htab->glink_eh_frame->output_section->alignment_power;
12692 size = (size + align - 1) & -align;
12693 htab->glink_eh_frame->rawsize = htab->glink_eh_frame->size;
12694 htab->glink_eh_frame->size = size;
12695 }
12696
12697 if (htab->params->plt_stub_align != 0)
12698 for (group = htab->group; group != NULL; group = group->next)
12699 if (group->stub_sec != NULL)
12700 group->stub_sec->size = ((group->stub_sec->size
12701 + (1 << htab->params->plt_stub_align) - 1)
12702 & -(1 << htab->params->plt_stub_align));
12703
12704 for (group = htab->group; group != NULL; group = group->next)
12705 if (group->stub_sec != NULL
12706 && group->stub_sec->rawsize != group->stub_sec->size
12707 && (htab->stub_iteration <= STUB_SHRINK_ITER
12708 || group->stub_sec->rawsize < group->stub_sec->size))
12709 break;
12710
12711 if (group == NULL
12712 && (htab->glink_eh_frame == NULL
12713 || htab->glink_eh_frame->rawsize == htab->glink_eh_frame->size))
12714 break;
12715
12716 /* Ask the linker to do its stuff. */
12717 (*htab->params->layout_sections_again) ();
12718 }
12719
12720 if (htab->glink_eh_frame != NULL
12721 && htab->glink_eh_frame->size != 0)
12722 {
12723 bfd_vma val;
12724 bfd_byte *p, *last_fde;
12725 size_t last_fde_len, size, align, pad;
12726 struct map_stub *group;
12727
12728 p = bfd_zalloc (htab->glink_eh_frame->owner, htab->glink_eh_frame->size);
12729 if (p == NULL)
12730 return FALSE;
12731 htab->glink_eh_frame->contents = p;
12732 last_fde = p;
12733 align = 4;
12734
12735 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
12736 /* CIE length (rewrite in case little-endian). */
12737 last_fde_len = ((sizeof (glink_eh_frame_cie) + align - 1) & -align) - 4;
12738 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
12739 p += last_fde_len + 4;
12740
12741 for (group = htab->group; group != NULL; group = group->next)
12742 if (group->stub_sec != NULL)
12743 {
12744 last_fde = p;
12745 last_fde_len = stub_eh_frame_size (group, align) - 4;
12746 /* FDE length. */
12747 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
12748 p += 4;
12749 /* CIE pointer. */
12750 val = p - htab->glink_eh_frame->contents;
12751 bfd_put_32 (htab->elf.dynobj, val, p);
12752 p += 4;
12753 /* Offset to stub section, written later. */
12754 p += 4;
12755 /* stub section size. */
12756 bfd_put_32 (htab->elf.dynobj, group->stub_sec->size, p);
12757 p += 4;
12758 /* Augmentation. */
12759 p += 1;
12760 if (group->tls_get_addr_opt_bctrl != -1u)
12761 {
12762 unsigned int to_bctrl = group->tls_get_addr_opt_bctrl / 4;
12763
12764 /* This FDE needs more than just the default.
12765 Describe __tls_get_addr_opt stub LR. */
12766 if (to_bctrl < 64)
12767 *p++ = DW_CFA_advance_loc + to_bctrl;
12768 else if (to_bctrl < 256)
12769 {
12770 *p++ = DW_CFA_advance_loc1;
12771 *p++ = to_bctrl;
12772 }
12773 else if (to_bctrl < 65536)
12774 {
12775 *p++ = DW_CFA_advance_loc2;
12776 bfd_put_16 (htab->elf.dynobj, to_bctrl, p);
12777 p += 2;
12778 }
12779 else
12780 {
12781 *p++ = DW_CFA_advance_loc4;
12782 bfd_put_32 (htab->elf.dynobj, to_bctrl, p);
12783 p += 4;
12784 }
12785 *p++ = DW_CFA_offset_extended_sf;
12786 *p++ = 65;
12787 *p++ = -(STK_LINKER (htab) / 8) & 0x7f;
12788 *p++ = DW_CFA_advance_loc + 4;
12789 *p++ = DW_CFA_restore_extended;
12790 *p++ = 65;
12791 }
12792 /* Pad. */
12793 p = last_fde + last_fde_len + 4;
12794 }
12795 if (htab->glink != NULL && htab->glink->size != 0)
12796 {
12797 last_fde = p;
12798 last_fde_len = ((24 + align - 1) & -align) - 4;
12799 /* FDE length. */
12800 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
12801 p += 4;
12802 /* CIE pointer. */
12803 val = p - htab->glink_eh_frame->contents;
12804 bfd_put_32 (htab->elf.dynobj, val, p);
12805 p += 4;
12806 /* Offset to .glink, written later. */
12807 p += 4;
12808 /* .glink size. */
12809 bfd_put_32 (htab->elf.dynobj, htab->glink->size - 8, p);
12810 p += 4;
12811 /* Augmentation. */
12812 p += 1;
12813
12814 *p++ = DW_CFA_advance_loc + 1;
12815 *p++ = DW_CFA_register;
12816 *p++ = 65;
12817 *p++ = htab->opd_abi ? 12 : 0;
12818 *p++ = DW_CFA_advance_loc + (htab->opd_abi ? 5 : 7);
12819 *p++ = DW_CFA_restore_extended;
12820 *p++ = 65;
12821 p += ((24 + align - 1) & -align) - 24;
12822 }
12823 /* Subsume any padding into the last FDE if user .eh_frame
12824 sections are aligned more than glink_eh_frame. Otherwise any
12825 zero padding will be seen as a terminator. */
12826 align = 1ul << htab->glink_eh_frame->output_section->alignment_power;
12827 size = p - htab->glink_eh_frame->contents;
12828 pad = ((size + align - 1) & -align) - size;
12829 htab->glink_eh_frame->size = size + pad;
12830 bfd_put_32 (htab->elf.dynobj, last_fde_len + pad, last_fde);
12831 }
12832
12833 maybe_strip_output (info, htab->brlt);
12834 if (htab->glink_eh_frame != NULL)
12835 maybe_strip_output (info, htab->glink_eh_frame);
12836
12837 return TRUE;
12838 }
12839
12840 /* Called after we have determined section placement. If sections
12841 move, we'll be called again. Provide a value for TOCstart. */
12842
12843 bfd_vma
12844 ppc64_elf_set_toc (struct bfd_link_info *info, bfd *obfd)
12845 {
12846 asection *s;
12847 bfd_vma TOCstart, adjust;
12848
12849 if (info != NULL)
12850 {
12851 struct elf_link_hash_entry *h;
12852 struct elf_link_hash_table *htab = elf_hash_table (info);
12853
12854 if (is_elf_hash_table (htab)
12855 && htab->hgot != NULL)
12856 h = htab->hgot;
12857 else
12858 {
12859 h = elf_link_hash_lookup (htab, ".TOC.", FALSE, FALSE, TRUE);
12860 if (is_elf_hash_table (htab))
12861 htab->hgot = h;
12862 }
12863 if (h != NULL
12864 && h->root.type == bfd_link_hash_defined
12865 && !h->root.linker_def
12866 && (!is_elf_hash_table (htab)
12867 || h->def_regular))
12868 {
12869 TOCstart = (h->root.u.def.value - TOC_BASE_OFF
12870 + h->root.u.def.section->output_offset
12871 + h->root.u.def.section->output_section->vma);
12872 _bfd_set_gp_value (obfd, TOCstart);
12873 return TOCstart;
12874 }
12875 }
12876
12877 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
12878 order. The TOC starts where the first of these sections starts. */
12879 s = bfd_get_section_by_name (obfd, ".got");
12880 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12881 s = bfd_get_section_by_name (obfd, ".toc");
12882 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12883 s = bfd_get_section_by_name (obfd, ".tocbss");
12884 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12885 s = bfd_get_section_by_name (obfd, ".plt");
12886 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12887 {
12888 /* This may happen for
12889 o references to TOC base (SYM@toc / TOC[tc0]) without a
12890 .toc directive
12891 o bad linker script
12892 o --gc-sections and empty TOC sections
12893
12894 FIXME: Warn user? */
12895
12896 /* Look for a likely section. We probably won't even be
12897 using TOCstart. */
12898 for (s = obfd->sections; s != NULL; s = s->next)
12899 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY
12900 | SEC_EXCLUDE))
12901 == (SEC_ALLOC | SEC_SMALL_DATA))
12902 break;
12903 if (s == NULL)
12904 for (s = obfd->sections; s != NULL; s = s->next)
12905 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_EXCLUDE))
12906 == (SEC_ALLOC | SEC_SMALL_DATA))
12907 break;
12908 if (s == NULL)
12909 for (s = obfd->sections; s != NULL; s = s->next)
12910 if ((s->flags & (SEC_ALLOC | SEC_READONLY | SEC_EXCLUDE))
12911 == SEC_ALLOC)
12912 break;
12913 if (s == NULL)
12914 for (s = obfd->sections; s != NULL; s = s->next)
12915 if ((s->flags & (SEC_ALLOC | SEC_EXCLUDE)) == SEC_ALLOC)
12916 break;
12917 }
12918
12919 TOCstart = 0;
12920 if (s != NULL)
12921 TOCstart = s->output_section->vma + s->output_offset;
12922
12923 /* Force alignment. */
12924 adjust = TOCstart & (TOC_BASE_ALIGN - 1);
12925 TOCstart -= adjust;
12926 _bfd_set_gp_value (obfd, TOCstart);
12927
12928 if (info != NULL && s != NULL)
12929 {
12930 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12931
12932 if (htab != NULL)
12933 {
12934 if (htab->elf.hgot != NULL)
12935 {
12936 htab->elf.hgot->root.u.def.value = TOC_BASE_OFF - adjust;
12937 htab->elf.hgot->root.u.def.section = s;
12938 }
12939 }
12940 else
12941 {
12942 struct bfd_link_hash_entry *bh = NULL;
12943 _bfd_generic_link_add_one_symbol (info, obfd, ".TOC.", BSF_GLOBAL,
12944 s, TOC_BASE_OFF - adjust,
12945 NULL, FALSE, FALSE, &bh);
12946 }
12947 }
12948 return TOCstart;
12949 }
12950
12951 /* Called via elf_link_hash_traverse from ppc64_elf_build_stubs to
12952 write out any global entry stubs. */
12953
12954 static bfd_boolean
12955 build_global_entry_stubs (struct elf_link_hash_entry *h, void *inf)
12956 {
12957 struct bfd_link_info *info;
12958 struct ppc_link_hash_table *htab;
12959 struct plt_entry *pent;
12960 asection *s;
12961
12962 if (h->root.type == bfd_link_hash_indirect)
12963 return TRUE;
12964
12965 if (!h->pointer_equality_needed)
12966 return TRUE;
12967
12968 if (h->def_regular)
12969 return TRUE;
12970
12971 info = inf;
12972 htab = ppc_hash_table (info);
12973 if (htab == NULL)
12974 return FALSE;
12975
12976 s = htab->glink;
12977 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
12978 if (pent->plt.offset != (bfd_vma) -1
12979 && pent->addend == 0)
12980 {
12981 bfd_byte *p;
12982 asection *plt;
12983 bfd_vma off;
12984
12985 p = s->contents + h->root.u.def.value;
12986 plt = htab->elf.splt;
12987 if (!htab->elf.dynamic_sections_created
12988 || h->dynindx == -1)
12989 plt = htab->elf.iplt;
12990 off = pent->plt.offset + plt->output_offset + plt->output_section->vma;
12991 off -= h->root.u.def.value + s->output_offset + s->output_section->vma;
12992
12993 if (off + 0x80008000 > 0xffffffff || (off & 3) != 0)
12994 {
12995 info->callbacks->einfo
12996 (_("%P: linkage table error against `%T'\n"),
12997 h->root.root.string);
12998 bfd_set_error (bfd_error_bad_value);
12999 htab->stub_error = TRUE;
13000 }
13001
13002 htab->stub_count[ppc_stub_global_entry - 1] += 1;
13003 if (htab->params->emit_stub_syms)
13004 {
13005 size_t len = strlen (h->root.root.string);
13006 char *name = bfd_malloc (sizeof "12345678.global_entry." + len);
13007
13008 if (name == NULL)
13009 return FALSE;
13010
13011 sprintf (name, "%08x.global_entry.%s", s->id, h->root.root.string);
13012 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
13013 if (h == NULL)
13014 return FALSE;
13015 if (h->root.type == bfd_link_hash_new)
13016 {
13017 h->root.type = bfd_link_hash_defined;
13018 h->root.u.def.section = s;
13019 h->root.u.def.value = p - s->contents;
13020 h->ref_regular = 1;
13021 h->def_regular = 1;
13022 h->ref_regular_nonweak = 1;
13023 h->forced_local = 1;
13024 h->non_elf = 0;
13025 h->root.linker_def = 1;
13026 }
13027 }
13028
13029 if (PPC_HA (off) != 0)
13030 {
13031 bfd_put_32 (s->owner, ADDIS_R12_R12 | PPC_HA (off), p);
13032 p += 4;
13033 }
13034 bfd_put_32 (s->owner, LD_R12_0R12 | PPC_LO (off), p);
13035 p += 4;
13036 bfd_put_32 (s->owner, MTCTR_R12, p);
13037 p += 4;
13038 bfd_put_32 (s->owner, BCTR, p);
13039 break;
13040 }
13041 return TRUE;
13042 }
13043
13044 /* Build all the stubs associated with the current output file.
13045 The stubs are kept in a hash table attached to the main linker
13046 hash table. This function is called via gldelf64ppc_finish. */
13047
13048 bfd_boolean
13049 ppc64_elf_build_stubs (struct bfd_link_info *info,
13050 char **stats)
13051 {
13052 struct ppc_link_hash_table *htab = ppc_hash_table (info);
13053 struct map_stub *group;
13054 asection *stub_sec;
13055 bfd_byte *p;
13056 int stub_sec_count = 0;
13057
13058 if (htab == NULL)
13059 return FALSE;
13060
13061 /* Allocate memory to hold the linker stubs. */
13062 for (group = htab->group; group != NULL; group = group->next)
13063 if ((stub_sec = group->stub_sec) != NULL
13064 && stub_sec->size != 0)
13065 {
13066 stub_sec->contents = bfd_zalloc (htab->params->stub_bfd, stub_sec->size);
13067 if (stub_sec->contents == NULL)
13068 return FALSE;
13069 stub_sec->size = 0;
13070 }
13071
13072 if (htab->glink != NULL && htab->glink->size != 0)
13073 {
13074 unsigned int indx;
13075 bfd_vma plt0;
13076
13077 /* Build the .glink plt call stub. */
13078 if (htab->params->emit_stub_syms)
13079 {
13080 struct elf_link_hash_entry *h;
13081 h = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
13082 TRUE, FALSE, FALSE);
13083 if (h == NULL)
13084 return FALSE;
13085 if (h->root.type == bfd_link_hash_new)
13086 {
13087 h->root.type = bfd_link_hash_defined;
13088 h->root.u.def.section = htab->glink;
13089 h->root.u.def.value = 8;
13090 h->ref_regular = 1;
13091 h->def_regular = 1;
13092 h->ref_regular_nonweak = 1;
13093 h->forced_local = 1;
13094 h->non_elf = 0;
13095 h->root.linker_def = 1;
13096 }
13097 }
13098 plt0 = (htab->elf.splt->output_section->vma
13099 + htab->elf.splt->output_offset
13100 - 16);
13101 if (info->emitrelocations)
13102 {
13103 Elf_Internal_Rela *r = get_relocs (htab->glink, 1);
13104 if (r == NULL)
13105 return FALSE;
13106 r->r_offset = (htab->glink->output_offset
13107 + htab->glink->output_section->vma);
13108 r->r_info = ELF64_R_INFO (0, R_PPC64_REL64);
13109 r->r_addend = plt0;
13110 }
13111 p = htab->glink->contents;
13112 plt0 -= htab->glink->output_section->vma + htab->glink->output_offset;
13113 bfd_put_64 (htab->glink->owner, plt0, p);
13114 p += 8;
13115 if (htab->opd_abi)
13116 {
13117 bfd_put_32 (htab->glink->owner, MFLR_R12, p);
13118 p += 4;
13119 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
13120 p += 4;
13121 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
13122 p += 4;
13123 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | (-16 & 0xfffc), p);
13124 p += 4;
13125 bfd_put_32 (htab->glink->owner, MTLR_R12, p);
13126 p += 4;
13127 bfd_put_32 (htab->glink->owner, ADD_R11_R2_R11, p);
13128 p += 4;
13129 bfd_put_32 (htab->glink->owner, LD_R12_0R11, p);
13130 p += 4;
13131 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | 8, p);
13132 p += 4;
13133 bfd_put_32 (htab->glink->owner, MTCTR_R12, p);
13134 p += 4;
13135 bfd_put_32 (htab->glink->owner, LD_R11_0R11 | 16, p);
13136 p += 4;
13137 }
13138 else
13139 {
13140 bfd_put_32 (htab->glink->owner, MFLR_R0, p);
13141 p += 4;
13142 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
13143 p += 4;
13144 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
13145 p += 4;
13146 bfd_put_32 (htab->glink->owner, STD_R2_0R1 + 24, p);
13147 p += 4;
13148 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | (-16 & 0xfffc), p);
13149 p += 4;
13150 bfd_put_32 (htab->glink->owner, MTLR_R0, p);
13151 p += 4;
13152 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
13153 p += 4;
13154 bfd_put_32 (htab->glink->owner, ADD_R11_R2_R11, p);
13155 p += 4;
13156 bfd_put_32 (htab->glink->owner, ADDI_R0_R12 | (-48 & 0xffff), p);
13157 p += 4;
13158 bfd_put_32 (htab->glink->owner, LD_R12_0R11, p);
13159 p += 4;
13160 bfd_put_32 (htab->glink->owner, SRDI_R0_R0_2, p);
13161 p += 4;
13162 bfd_put_32 (htab->glink->owner, MTCTR_R12, p);
13163 p += 4;
13164 bfd_put_32 (htab->glink->owner, LD_R11_0R11 | 8, p);
13165 p += 4;
13166 }
13167 bfd_put_32 (htab->glink->owner, BCTR, p);
13168 p += 4;
13169 while (p - htab->glink->contents < GLINK_CALL_STUB_SIZE)
13170 {
13171 bfd_put_32 (htab->glink->owner, NOP, p);
13172 p += 4;
13173 }
13174
13175 /* Build the .glink lazy link call stubs. */
13176 indx = 0;
13177 while (p < htab->glink->contents + htab->glink->rawsize)
13178 {
13179 if (htab->opd_abi)
13180 {
13181 if (indx < 0x8000)
13182 {
13183 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
13184 p += 4;
13185 }
13186 else
13187 {
13188 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
13189 p += 4;
13190 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx),
13191 p);
13192 p += 4;
13193 }
13194 }
13195 bfd_put_32 (htab->glink->owner,
13196 B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p);
13197 indx++;
13198 p += 4;
13199 }
13200
13201 /* Build .glink global entry stubs. */
13202 if (htab->glink->size > htab->glink->rawsize)
13203 elf_link_hash_traverse (&htab->elf, build_global_entry_stubs, info);
13204 }
13205
13206 if (htab->brlt != NULL && htab->brlt->size != 0)
13207 {
13208 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
13209 htab->brlt->size);
13210 if (htab->brlt->contents == NULL)
13211 return FALSE;
13212 }
13213 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
13214 {
13215 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
13216 htab->relbrlt->size);
13217 if (htab->relbrlt->contents == NULL)
13218 return FALSE;
13219 }
13220
13221 /* Build the stubs as directed by the stub hash table. */
13222 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
13223
13224 for (group = htab->group; group != NULL; group = group->next)
13225 if (group->needs_save_res)
13226 {
13227 stub_sec = group->stub_sec;
13228 memcpy (stub_sec->contents + stub_sec->size, htab->sfpr->contents,
13229 htab->sfpr->size);
13230 if (htab->params->emit_stub_syms)
13231 {
13232 unsigned int i;
13233
13234 for (i = 0; i < ARRAY_SIZE (save_res_funcs); i++)
13235 if (!sfpr_define (info, &save_res_funcs[i], stub_sec))
13236 return FALSE;
13237 }
13238 stub_sec->size += htab->sfpr->size;
13239 }
13240
13241 if (htab->relbrlt != NULL)
13242 htab->relbrlt->reloc_count = 0;
13243
13244 if (htab->params->plt_stub_align != 0)
13245 for (group = htab->group; group != NULL; group = group->next)
13246 if ((stub_sec = group->stub_sec) != NULL)
13247 stub_sec->size = ((stub_sec->size
13248 + (1 << htab->params->plt_stub_align) - 1)
13249 & -(1 << htab->params->plt_stub_align));
13250
13251 for (group = htab->group; group != NULL; group = group->next)
13252 if ((stub_sec = group->stub_sec) != NULL)
13253 {
13254 stub_sec_count += 1;
13255 if (stub_sec->rawsize != stub_sec->size
13256 && (htab->stub_iteration <= STUB_SHRINK_ITER
13257 || stub_sec->rawsize < stub_sec->size))
13258 break;
13259 }
13260
13261 if (group != NULL)
13262 {
13263 htab->stub_error = TRUE;
13264 info->callbacks->einfo (_("%P: stubs don't match calculated size\n"));
13265 }
13266
13267 if (htab->stub_error)
13268 return FALSE;
13269
13270 if (stats != NULL)
13271 {
13272 *stats = bfd_malloc (500);
13273 if (*stats == NULL)
13274 return FALSE;
13275
13276 sprintf (*stats, _("linker stubs in %u group%s\n"
13277 " branch %lu\n"
13278 " toc adjust %lu\n"
13279 " long branch %lu\n"
13280 " long toc adj %lu\n"
13281 " plt call %lu\n"
13282 " plt call toc %lu\n"
13283 " global entry %lu"),
13284 stub_sec_count,
13285 stub_sec_count == 1 ? "" : "s",
13286 htab->stub_count[ppc_stub_long_branch - 1],
13287 htab->stub_count[ppc_stub_long_branch_r2off - 1],
13288 htab->stub_count[ppc_stub_plt_branch - 1],
13289 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
13290 htab->stub_count[ppc_stub_plt_call - 1],
13291 htab->stub_count[ppc_stub_plt_call_r2save - 1],
13292 htab->stub_count[ppc_stub_global_entry - 1]);
13293 }
13294 return TRUE;
13295 }
13296
13297 /* What to do when ld finds relocations against symbols defined in
13298 discarded sections. */
13299
13300 static unsigned int
13301 ppc64_elf_action_discarded (asection *sec)
13302 {
13303 if (strcmp (".opd", sec->name) == 0)
13304 return 0;
13305
13306 if (strcmp (".toc", sec->name) == 0)
13307 return 0;
13308
13309 if (strcmp (".toc1", sec->name) == 0)
13310 return 0;
13311
13312 return _bfd_elf_default_action_discarded (sec);
13313 }
13314
13315 /* The RELOCATE_SECTION function is called by the ELF backend linker
13316 to handle the relocations for a section.
13317
13318 The relocs are always passed as Rela structures; if the section
13319 actually uses Rel structures, the r_addend field will always be
13320 zero.
13321
13322 This function is responsible for adjust the section contents as
13323 necessary, and (if using Rela relocs and generating a
13324 relocatable output file) adjusting the reloc addend as
13325 necessary.
13326
13327 This function does not have to worry about setting the reloc
13328 address or the reloc symbol index.
13329
13330 LOCAL_SYMS is a pointer to the swapped in local symbols.
13331
13332 LOCAL_SECTIONS is an array giving the section in the input file
13333 corresponding to the st_shndx field of each local symbol.
13334
13335 The global hash table entry for the global symbols can be found
13336 via elf_sym_hashes (input_bfd).
13337
13338 When generating relocatable output, this function must handle
13339 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
13340 going to be the section symbol corresponding to the output
13341 section, which means that the addend must be adjusted
13342 accordingly. */
13343
13344 static bfd_boolean
13345 ppc64_elf_relocate_section (bfd *output_bfd,
13346 struct bfd_link_info *info,
13347 bfd *input_bfd,
13348 asection *input_section,
13349 bfd_byte *contents,
13350 Elf_Internal_Rela *relocs,
13351 Elf_Internal_Sym *local_syms,
13352 asection **local_sections)
13353 {
13354 struct ppc_link_hash_table *htab;
13355 Elf_Internal_Shdr *symtab_hdr;
13356 struct elf_link_hash_entry **sym_hashes;
13357 Elf_Internal_Rela *rel;
13358 Elf_Internal_Rela *wrel;
13359 Elf_Internal_Rela *relend;
13360 Elf_Internal_Rela outrel;
13361 bfd_byte *loc;
13362 struct got_entry **local_got_ents;
13363 bfd_vma TOCstart;
13364 bfd_boolean ret = TRUE;
13365 bfd_boolean is_opd;
13366 /* Assume 'at' branch hints. */
13367 bfd_boolean is_isa_v2 = TRUE;
13368 bfd_vma d_offset = (bfd_big_endian (input_bfd) ? 2 : 0);
13369
13370 /* Initialize howto table if needed. */
13371 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
13372 ppc_howto_init ();
13373
13374 htab = ppc_hash_table (info);
13375 if (htab == NULL)
13376 return FALSE;
13377
13378 /* Don't relocate stub sections. */
13379 if (input_section->owner == htab->params->stub_bfd)
13380 return TRUE;
13381
13382 BFD_ASSERT (is_ppc64_elf (input_bfd));
13383
13384 local_got_ents = elf_local_got_ents (input_bfd);
13385 TOCstart = elf_gp (output_bfd);
13386 symtab_hdr = &elf_symtab_hdr (input_bfd);
13387 sym_hashes = elf_sym_hashes (input_bfd);
13388 is_opd = ppc64_elf_section_data (input_section)->sec_type == sec_opd;
13389
13390 rel = wrel = relocs;
13391 relend = relocs + input_section->reloc_count;
13392 for (; rel < relend; wrel++, rel++)
13393 {
13394 enum elf_ppc64_reloc_type r_type;
13395 bfd_vma addend;
13396 bfd_reloc_status_type r;
13397 Elf_Internal_Sym *sym;
13398 asection *sec;
13399 struct elf_link_hash_entry *h_elf;
13400 struct ppc_link_hash_entry *h;
13401 struct ppc_link_hash_entry *fdh;
13402 const char *sym_name;
13403 unsigned long r_symndx, toc_symndx;
13404 bfd_vma toc_addend;
13405 unsigned char tls_mask, tls_gd, tls_type;
13406 unsigned char sym_type;
13407 bfd_vma relocation;
13408 bfd_boolean unresolved_reloc;
13409 bfd_boolean warned;
13410 enum { DEST_NORMAL, DEST_OPD, DEST_STUB } reloc_dest;
13411 unsigned int insn;
13412 unsigned int mask;
13413 struct ppc_stub_hash_entry *stub_entry;
13414 bfd_vma max_br_offset;
13415 bfd_vma from;
13416 Elf_Internal_Rela orig_rel;
13417 reloc_howto_type *howto;
13418 struct reloc_howto_struct alt_howto;
13419
13420 again:
13421 orig_rel = *rel;
13422
13423 r_type = ELF64_R_TYPE (rel->r_info);
13424 r_symndx = ELF64_R_SYM (rel->r_info);
13425
13426 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
13427 symbol of the previous ADDR64 reloc. The symbol gives us the
13428 proper TOC base to use. */
13429 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
13430 && wrel != relocs
13431 && ELF64_R_TYPE (wrel[-1].r_info) == R_PPC64_ADDR64
13432 && is_opd)
13433 r_symndx = ELF64_R_SYM (wrel[-1].r_info);
13434
13435 sym = NULL;
13436 sec = NULL;
13437 h_elf = NULL;
13438 sym_name = NULL;
13439 unresolved_reloc = FALSE;
13440 warned = FALSE;
13441
13442 if (r_symndx < symtab_hdr->sh_info)
13443 {
13444 /* It's a local symbol. */
13445 struct _opd_sec_data *opd;
13446
13447 sym = local_syms + r_symndx;
13448 sec = local_sections[r_symndx];
13449 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
13450 sym_type = ELF64_ST_TYPE (sym->st_info);
13451 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
13452 opd = get_opd_info (sec);
13453 if (opd != NULL && opd->adjust != NULL)
13454 {
13455 long adjust = opd->adjust[OPD_NDX (sym->st_value
13456 + rel->r_addend)];
13457 if (adjust == -1)
13458 relocation = 0;
13459 else
13460 {
13461 /* If this is a relocation against the opd section sym
13462 and we have edited .opd, adjust the reloc addend so
13463 that ld -r and ld --emit-relocs output is correct.
13464 If it is a reloc against some other .opd symbol,
13465 then the symbol value will be adjusted later. */
13466 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
13467 rel->r_addend += adjust;
13468 else
13469 relocation += adjust;
13470 }
13471 }
13472 }
13473 else
13474 {
13475 bfd_boolean ignored;
13476
13477 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
13478 r_symndx, symtab_hdr, sym_hashes,
13479 h_elf, sec, relocation,
13480 unresolved_reloc, warned, ignored);
13481 sym_name = h_elf->root.root.string;
13482 sym_type = h_elf->type;
13483 if (sec != NULL
13484 && sec->owner == output_bfd
13485 && strcmp (sec->name, ".opd") == 0)
13486 {
13487 /* This is a symbol defined in a linker script. All
13488 such are defined in output sections, even those
13489 defined by simple assignment from a symbol defined in
13490 an input section. Transfer the symbol to an
13491 appropriate input .opd section, so that a branch to
13492 this symbol will be mapped to the location specified
13493 by the opd entry. */
13494 struct bfd_link_order *lo;
13495 for (lo = sec->map_head.link_order; lo != NULL; lo = lo->next)
13496 if (lo->type == bfd_indirect_link_order)
13497 {
13498 asection *isec = lo->u.indirect.section;
13499 if (h_elf->root.u.def.value >= isec->output_offset
13500 && h_elf->root.u.def.value < (isec->output_offset
13501 + isec->size))
13502 {
13503 h_elf->root.u.def.value -= isec->output_offset;
13504 h_elf->root.u.def.section = isec;
13505 sec = isec;
13506 break;
13507 }
13508 }
13509 }
13510 }
13511 h = (struct ppc_link_hash_entry *) h_elf;
13512
13513 if (sec != NULL && discarded_section (sec))
13514 {
13515 _bfd_clear_contents (ppc64_elf_howto_table[r_type],
13516 input_bfd, input_section,
13517 contents + rel->r_offset);
13518 wrel->r_offset = rel->r_offset;
13519 wrel->r_info = 0;
13520 wrel->r_addend = 0;
13521
13522 /* For ld -r, remove relocations in debug sections against
13523 symbols defined in discarded sections. Not done for
13524 non-debug to preserve relocs in .eh_frame which the
13525 eh_frame editing code expects to be present. */
13526 if (bfd_link_relocatable (info)
13527 && (input_section->flags & SEC_DEBUGGING))
13528 wrel--;
13529
13530 continue;
13531 }
13532
13533 if (bfd_link_relocatable (info))
13534 goto copy_reloc;
13535
13536 if (h != NULL && &h->elf == htab->elf.hgot)
13537 {
13538 relocation = TOCstart + htab->sec_info[input_section->id].toc_off;
13539 sec = bfd_abs_section_ptr;
13540 unresolved_reloc = FALSE;
13541 }
13542
13543 /* TLS optimizations. Replace instruction sequences and relocs
13544 based on information we collected in tls_optimize. We edit
13545 RELOCS so that --emit-relocs will output something sensible
13546 for the final instruction stream. */
13547 tls_mask = 0;
13548 tls_gd = 0;
13549 toc_symndx = 0;
13550 if (h != NULL)
13551 tls_mask = h->tls_mask;
13552 else if (local_got_ents != NULL)
13553 {
13554 struct plt_entry **local_plt = (struct plt_entry **)
13555 (local_got_ents + symtab_hdr->sh_info);
13556 unsigned char *lgot_masks = (unsigned char *)
13557 (local_plt + symtab_hdr->sh_info);
13558 tls_mask = lgot_masks[r_symndx];
13559 }
13560 if (tls_mask == 0
13561 && (r_type == R_PPC64_TLS
13562 || r_type == R_PPC64_TLSGD
13563 || r_type == R_PPC64_TLSLD))
13564 {
13565 /* Check for toc tls entries. */
13566 unsigned char *toc_tls;
13567
13568 if (!get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
13569 &local_syms, rel, input_bfd))
13570 return FALSE;
13571
13572 if (toc_tls)
13573 tls_mask = *toc_tls;
13574 }
13575
13576 /* Check that tls relocs are used with tls syms, and non-tls
13577 relocs are used with non-tls syms. */
13578 if (r_symndx != STN_UNDEF
13579 && r_type != R_PPC64_NONE
13580 && (h == NULL
13581 || h->elf.root.type == bfd_link_hash_defined
13582 || h->elf.root.type == bfd_link_hash_defweak)
13583 && (IS_PPC64_TLS_RELOC (r_type)
13584 != (sym_type == STT_TLS
13585 || (sym_type == STT_SECTION
13586 && (sec->flags & SEC_THREAD_LOCAL) != 0))))
13587 {
13588 if (tls_mask != 0
13589 && (r_type == R_PPC64_TLS
13590 || r_type == R_PPC64_TLSGD
13591 || r_type == R_PPC64_TLSLD))
13592 /* R_PPC64_TLS is OK against a symbol in the TOC. */
13593 ;
13594 else
13595 info->callbacks->einfo
13596 (!IS_PPC64_TLS_RELOC (r_type)
13597 /* xgettext:c-format */
13598 ? _("%H: %s used with TLS symbol `%T'\n")
13599 /* xgettext:c-format */
13600 : _("%H: %s used with non-TLS symbol `%T'\n"),
13601 input_bfd, input_section, rel->r_offset,
13602 ppc64_elf_howto_table[r_type]->name,
13603 sym_name);
13604 }
13605
13606 /* Ensure reloc mapping code below stays sane. */
13607 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
13608 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
13609 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
13610 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
13611 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
13612 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
13613 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
13614 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
13615 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
13616 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
13617 abort ();
13618
13619 switch (r_type)
13620 {
13621 default:
13622 break;
13623
13624 case R_PPC64_LO_DS_OPT:
13625 insn = bfd_get_32 (input_bfd, contents + rel->r_offset - d_offset);
13626 if ((insn & (0x3f << 26)) != 58u << 26)
13627 abort ();
13628 insn += (14u << 26) - (58u << 26);
13629 bfd_put_32 (input_bfd, insn, contents + rel->r_offset - d_offset);
13630 r_type = R_PPC64_TOC16_LO;
13631 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13632 break;
13633
13634 case R_PPC64_TOC16:
13635 case R_PPC64_TOC16_LO:
13636 case R_PPC64_TOC16_DS:
13637 case R_PPC64_TOC16_LO_DS:
13638 {
13639 /* Check for toc tls entries. */
13640 unsigned char *toc_tls;
13641 int retval;
13642
13643 retval = get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
13644 &local_syms, rel, input_bfd);
13645 if (retval == 0)
13646 return FALSE;
13647
13648 if (toc_tls)
13649 {
13650 tls_mask = *toc_tls;
13651 if (r_type == R_PPC64_TOC16_DS
13652 || r_type == R_PPC64_TOC16_LO_DS)
13653 {
13654 if (tls_mask != 0
13655 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
13656 goto toctprel;
13657 }
13658 else
13659 {
13660 /* If we found a GD reloc pair, then we might be
13661 doing a GD->IE transition. */
13662 if (retval == 2)
13663 {
13664 tls_gd = TLS_TPRELGD;
13665 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13666 goto tls_ldgd_opt;
13667 }
13668 else if (retval == 3)
13669 {
13670 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13671 goto tls_ldgd_opt;
13672 }
13673 }
13674 }
13675 }
13676 break;
13677
13678 case R_PPC64_GOT_TPREL16_HI:
13679 case R_PPC64_GOT_TPREL16_HA:
13680 if (tls_mask != 0
13681 && (tls_mask & TLS_TPREL) == 0)
13682 {
13683 rel->r_offset -= d_offset;
13684 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
13685 r_type = R_PPC64_NONE;
13686 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13687 }
13688 break;
13689
13690 case R_PPC64_GOT_TPREL16_DS:
13691 case R_PPC64_GOT_TPREL16_LO_DS:
13692 if (tls_mask != 0
13693 && (tls_mask & TLS_TPREL) == 0)
13694 {
13695 toctprel:
13696 insn = bfd_get_32 (input_bfd,
13697 contents + rel->r_offset - d_offset);
13698 insn &= 31 << 21;
13699 insn |= 0x3c0d0000; /* addis 0,13,0 */
13700 bfd_put_32 (input_bfd, insn,
13701 contents + rel->r_offset - d_offset);
13702 r_type = R_PPC64_TPREL16_HA;
13703 if (toc_symndx != 0)
13704 {
13705 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
13706 rel->r_addend = toc_addend;
13707 /* We changed the symbol. Start over in order to
13708 get h, sym, sec etc. right. */
13709 goto again;
13710 }
13711 else
13712 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13713 }
13714 break;
13715
13716 case R_PPC64_TLS:
13717 if (tls_mask != 0
13718 && (tls_mask & TLS_TPREL) == 0)
13719 {
13720 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
13721 insn = _bfd_elf_ppc_at_tls_transform (insn, 13);
13722 if (insn == 0)
13723 abort ();
13724 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
13725 /* Was PPC64_TLS which sits on insn boundary, now
13726 PPC64_TPREL16_LO which is at low-order half-word. */
13727 rel->r_offset += d_offset;
13728 r_type = R_PPC64_TPREL16_LO;
13729 if (toc_symndx != 0)
13730 {
13731 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
13732 rel->r_addend = toc_addend;
13733 /* We changed the symbol. Start over in order to
13734 get h, sym, sec etc. right. */
13735 goto again;
13736 }
13737 else
13738 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13739 }
13740 break;
13741
13742 case R_PPC64_GOT_TLSGD16_HI:
13743 case R_PPC64_GOT_TLSGD16_HA:
13744 tls_gd = TLS_TPRELGD;
13745 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13746 goto tls_gdld_hi;
13747 break;
13748
13749 case R_PPC64_GOT_TLSLD16_HI:
13750 case R_PPC64_GOT_TLSLD16_HA:
13751 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13752 {
13753 tls_gdld_hi:
13754 if ((tls_mask & tls_gd) != 0)
13755 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
13756 + R_PPC64_GOT_TPREL16_DS);
13757 else
13758 {
13759 rel->r_offset -= d_offset;
13760 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
13761 r_type = R_PPC64_NONE;
13762 }
13763 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13764 }
13765 break;
13766
13767 case R_PPC64_GOT_TLSGD16:
13768 case R_PPC64_GOT_TLSGD16_LO:
13769 tls_gd = TLS_TPRELGD;
13770 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13771 goto tls_ldgd_opt;
13772 break;
13773
13774 case R_PPC64_GOT_TLSLD16:
13775 case R_PPC64_GOT_TLSLD16_LO:
13776 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13777 {
13778 unsigned int insn1, insn2;
13779 bfd_vma offset;
13780
13781 tls_ldgd_opt:
13782 offset = (bfd_vma) -1;
13783 /* If not using the newer R_PPC64_TLSGD/LD to mark
13784 __tls_get_addr calls, we must trust that the call
13785 stays with its arg setup insns, ie. that the next
13786 reloc is the __tls_get_addr call associated with
13787 the current reloc. Edit both insns. */
13788 if (input_section->has_tls_get_addr_call
13789 && rel + 1 < relend
13790 && branch_reloc_hash_match (input_bfd, rel + 1,
13791 htab->tls_get_addr,
13792 htab->tls_get_addr_fd))
13793 offset = rel[1].r_offset;
13794 /* We read the low GOT_TLS (or TOC16) insn because we
13795 need to keep the destination reg. It may be
13796 something other than the usual r3, and moved to r3
13797 before the call by intervening code. */
13798 insn1 = bfd_get_32 (input_bfd,
13799 contents + rel->r_offset - d_offset);
13800 if ((tls_mask & tls_gd) != 0)
13801 {
13802 /* IE */
13803 insn1 &= (0x1f << 21) | (0x1f << 16);
13804 insn1 |= 58 << 26; /* ld */
13805 insn2 = 0x7c636a14; /* add 3,3,13 */
13806 if (offset != (bfd_vma) -1)
13807 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13808 if ((tls_mask & TLS_EXPLICIT) == 0)
13809 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
13810 + R_PPC64_GOT_TPREL16_DS);
13811 else
13812 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
13813 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13814 }
13815 else
13816 {
13817 /* LE */
13818 insn1 &= 0x1f << 21;
13819 insn1 |= 0x3c0d0000; /* addis r,13,0 */
13820 insn2 = 0x38630000; /* addi 3,3,0 */
13821 if (tls_gd == 0)
13822 {
13823 /* Was an LD reloc. */
13824 if (toc_symndx)
13825 sec = local_sections[toc_symndx];
13826 for (r_symndx = 0;
13827 r_symndx < symtab_hdr->sh_info;
13828 r_symndx++)
13829 if (local_sections[r_symndx] == sec)
13830 break;
13831 if (r_symndx >= symtab_hdr->sh_info)
13832 r_symndx = STN_UNDEF;
13833 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
13834 if (r_symndx != STN_UNDEF)
13835 rel->r_addend -= (local_syms[r_symndx].st_value
13836 + sec->output_offset
13837 + sec->output_section->vma);
13838 }
13839 else if (toc_symndx != 0)
13840 {
13841 r_symndx = toc_symndx;
13842 rel->r_addend = toc_addend;
13843 }
13844 r_type = R_PPC64_TPREL16_HA;
13845 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13846 if (offset != (bfd_vma) -1)
13847 {
13848 rel[1].r_info = ELF64_R_INFO (r_symndx,
13849 R_PPC64_TPREL16_LO);
13850 rel[1].r_offset = offset + d_offset;
13851 rel[1].r_addend = rel->r_addend;
13852 }
13853 }
13854 bfd_put_32 (input_bfd, insn1,
13855 contents + rel->r_offset - d_offset);
13856 if (offset != (bfd_vma) -1)
13857 bfd_put_32 (input_bfd, insn2, contents + offset);
13858 if ((tls_mask & tls_gd) == 0
13859 && (tls_gd == 0 || toc_symndx != 0))
13860 {
13861 /* We changed the symbol. Start over in order
13862 to get h, sym, sec etc. right. */
13863 goto again;
13864 }
13865 }
13866 break;
13867
13868 case R_PPC64_TLSGD:
13869 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13870 {
13871 unsigned int insn2;
13872 bfd_vma offset = rel->r_offset;
13873
13874 if ((tls_mask & TLS_TPRELGD) != 0)
13875 {
13876 /* IE */
13877 r_type = R_PPC64_NONE;
13878 insn2 = 0x7c636a14; /* add 3,3,13 */
13879 }
13880 else
13881 {
13882 /* LE */
13883 if (toc_symndx != 0)
13884 {
13885 r_symndx = toc_symndx;
13886 rel->r_addend = toc_addend;
13887 }
13888 r_type = R_PPC64_TPREL16_LO;
13889 rel->r_offset = offset + d_offset;
13890 insn2 = 0x38630000; /* addi 3,3,0 */
13891 }
13892 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13893 /* Zap the reloc on the _tls_get_addr call too. */
13894 BFD_ASSERT (offset == rel[1].r_offset);
13895 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13896 bfd_put_32 (input_bfd, insn2, contents + offset);
13897 if ((tls_mask & TLS_TPRELGD) == 0 && toc_symndx != 0)
13898 goto again;
13899 }
13900 break;
13901
13902 case R_PPC64_TLSLD:
13903 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13904 {
13905 unsigned int insn2;
13906 bfd_vma offset = rel->r_offset;
13907
13908 if (toc_symndx)
13909 sec = local_sections[toc_symndx];
13910 for (r_symndx = 0;
13911 r_symndx < symtab_hdr->sh_info;
13912 r_symndx++)
13913 if (local_sections[r_symndx] == sec)
13914 break;
13915 if (r_symndx >= symtab_hdr->sh_info)
13916 r_symndx = STN_UNDEF;
13917 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
13918 if (r_symndx != STN_UNDEF)
13919 rel->r_addend -= (local_syms[r_symndx].st_value
13920 + sec->output_offset
13921 + sec->output_section->vma);
13922
13923 r_type = R_PPC64_TPREL16_LO;
13924 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13925 rel->r_offset = offset + d_offset;
13926 /* Zap the reloc on the _tls_get_addr call too. */
13927 BFD_ASSERT (offset == rel[1].r_offset);
13928 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13929 insn2 = 0x38630000; /* addi 3,3,0 */
13930 bfd_put_32 (input_bfd, insn2, contents + offset);
13931 goto again;
13932 }
13933 break;
13934
13935 case R_PPC64_DTPMOD64:
13936 if (rel + 1 < relend
13937 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
13938 && rel[1].r_offset == rel->r_offset + 8)
13939 {
13940 if ((tls_mask & TLS_GD) == 0)
13941 {
13942 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
13943 if ((tls_mask & TLS_TPRELGD) != 0)
13944 r_type = R_PPC64_TPREL64;
13945 else
13946 {
13947 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
13948 r_type = R_PPC64_NONE;
13949 }
13950 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13951 }
13952 }
13953 else
13954 {
13955 if ((tls_mask & TLS_LD) == 0)
13956 {
13957 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
13958 r_type = R_PPC64_NONE;
13959 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13960 }
13961 }
13962 break;
13963
13964 case R_PPC64_TPREL64:
13965 if ((tls_mask & TLS_TPREL) == 0)
13966 {
13967 r_type = R_PPC64_NONE;
13968 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13969 }
13970 break;
13971
13972 case R_PPC64_ENTRY:
13973 relocation = TOCstart + htab->sec_info[input_section->id].toc_off;
13974 if (!bfd_link_pic (info)
13975 && !info->traditional_format
13976 && relocation + 0x80008000 <= 0xffffffff)
13977 {
13978 unsigned int insn1, insn2;
13979
13980 insn1 = bfd_get_32 (input_bfd, contents + rel->r_offset);
13981 insn2 = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
13982 if ((insn1 & ~0xfffc) == LD_R2_0R12
13983 && insn2 == ADD_R2_R2_R12)
13984 {
13985 bfd_put_32 (input_bfd,
13986 LIS_R2 + PPC_HA (relocation),
13987 contents + rel->r_offset);
13988 bfd_put_32 (input_bfd,
13989 ADDI_R2_R2 + PPC_LO (relocation),
13990 contents + rel->r_offset + 4);
13991 }
13992 }
13993 else
13994 {
13995 relocation -= (rel->r_offset
13996 + input_section->output_offset
13997 + input_section->output_section->vma);
13998 if (relocation + 0x80008000 <= 0xffffffff)
13999 {
14000 unsigned int insn1, insn2;
14001
14002 insn1 = bfd_get_32 (input_bfd, contents + rel->r_offset);
14003 insn2 = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
14004 if ((insn1 & ~0xfffc) == LD_R2_0R12
14005 && insn2 == ADD_R2_R2_R12)
14006 {
14007 bfd_put_32 (input_bfd,
14008 ADDIS_R2_R12 + PPC_HA (relocation),
14009 contents + rel->r_offset);
14010 bfd_put_32 (input_bfd,
14011 ADDI_R2_R2 + PPC_LO (relocation),
14012 contents + rel->r_offset + 4);
14013 }
14014 }
14015 }
14016 break;
14017
14018 case R_PPC64_REL16_HA:
14019 /* If we are generating a non-PIC executable, edit
14020 . 0: addis 2,12,.TOC.-0b@ha
14021 . addi 2,2,.TOC.-0b@l
14022 used by ELFv2 global entry points to set up r2, to
14023 . lis 2,.TOC.@ha
14024 . addi 2,2,.TOC.@l
14025 if .TOC. is in range. */
14026 if (!bfd_link_pic (info)
14027 && !info->traditional_format
14028 && !htab->opd_abi
14029 && rel->r_addend == d_offset
14030 && h != NULL && &h->elf == htab->elf.hgot
14031 && rel + 1 < relend
14032 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_REL16_LO)
14033 && rel[1].r_offset == rel->r_offset + 4
14034 && rel[1].r_addend == rel->r_addend + 4
14035 && relocation + 0x80008000 <= 0xffffffff)
14036 {
14037 unsigned int insn1, insn2;
14038 bfd_vma offset = rel->r_offset - d_offset;
14039 insn1 = bfd_get_32 (input_bfd, contents + offset);
14040 insn2 = bfd_get_32 (input_bfd, contents + offset + 4);
14041 if ((insn1 & 0xffff0000) == ADDIS_R2_R12
14042 && (insn2 & 0xffff0000) == ADDI_R2_R2)
14043 {
14044 r_type = R_PPC64_ADDR16_HA;
14045 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14046 rel->r_addend -= d_offset;
14047 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_ADDR16_LO);
14048 rel[1].r_addend -= d_offset + 4;
14049 bfd_put_32 (input_bfd, LIS_R2, contents + offset);
14050 }
14051 }
14052 break;
14053 }
14054
14055 /* Handle other relocations that tweak non-addend part of insn. */
14056 insn = 0;
14057 max_br_offset = 1 << 25;
14058 addend = rel->r_addend;
14059 reloc_dest = DEST_NORMAL;
14060 switch (r_type)
14061 {
14062 default:
14063 break;
14064
14065 case R_PPC64_TOCSAVE:
14066 if (relocation + addend == (rel->r_offset
14067 + input_section->output_offset
14068 + input_section->output_section->vma)
14069 && tocsave_find (htab, NO_INSERT,
14070 &local_syms, rel, input_bfd))
14071 {
14072 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
14073 if (insn == NOP
14074 || insn == CROR_151515 || insn == CROR_313131)
14075 bfd_put_32 (input_bfd,
14076 STD_R2_0R1 + STK_TOC (htab),
14077 contents + rel->r_offset);
14078 }
14079 break;
14080
14081 /* Branch taken prediction relocations. */
14082 case R_PPC64_ADDR14_BRTAKEN:
14083 case R_PPC64_REL14_BRTAKEN:
14084 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
14085 /* Fall through. */
14086
14087 /* Branch not taken prediction relocations. */
14088 case R_PPC64_ADDR14_BRNTAKEN:
14089 case R_PPC64_REL14_BRNTAKEN:
14090 insn |= bfd_get_32 (input_bfd,
14091 contents + rel->r_offset) & ~(0x01 << 21);
14092 /* Fall through. */
14093
14094 case R_PPC64_REL14:
14095 max_br_offset = 1 << 15;
14096 /* Fall through. */
14097
14098 case R_PPC64_REL24:
14099 /* Calls to functions with a different TOC, such as calls to
14100 shared objects, need to alter the TOC pointer. This is
14101 done using a linkage stub. A REL24 branching to these
14102 linkage stubs needs to be followed by a nop, as the nop
14103 will be replaced with an instruction to restore the TOC
14104 base pointer. */
14105 fdh = h;
14106 if (h != NULL
14107 && h->oh != NULL
14108 && h->oh->is_func_descriptor)
14109 fdh = ppc_follow_link (h->oh);
14110 stub_entry = ppc_get_stub_entry (input_section, sec, fdh, &orig_rel,
14111 htab);
14112 if (stub_entry != NULL
14113 && (stub_entry->stub_type == ppc_stub_plt_call
14114 || stub_entry->stub_type == ppc_stub_plt_call_r2save
14115 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
14116 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
14117 {
14118 bfd_boolean can_plt_call = FALSE;
14119
14120 if (stub_entry->stub_type == ppc_stub_plt_call
14121 && !htab->opd_abi
14122 && htab->params->plt_localentry0 != 0
14123 && is_elfv2_localentry0 (&h->elf))
14124 {
14125 /* The function doesn't use or change r2. */
14126 can_plt_call = TRUE;
14127 }
14128
14129 /* All of these stubs may modify r2, so there must be a
14130 branch and link followed by a nop. The nop is
14131 replaced by an insn to restore r2. */
14132 else if (rel->r_offset + 8 <= input_section->size)
14133 {
14134 unsigned long br;
14135
14136 br = bfd_get_32 (input_bfd,
14137 contents + rel->r_offset);
14138 if ((br & 1) != 0)
14139 {
14140 unsigned long nop;
14141
14142 nop = bfd_get_32 (input_bfd,
14143 contents + rel->r_offset + 4);
14144 if (nop == NOP
14145 || nop == CROR_151515 || nop == CROR_313131)
14146 {
14147 if (h != NULL
14148 && (h == htab->tls_get_addr_fd
14149 || h == htab->tls_get_addr)
14150 && htab->params->tls_get_addr_opt)
14151 {
14152 /* Special stub used, leave nop alone. */
14153 }
14154 else
14155 bfd_put_32 (input_bfd,
14156 LD_R2_0R1 + STK_TOC (htab),
14157 contents + rel->r_offset + 4);
14158 can_plt_call = TRUE;
14159 }
14160 }
14161 }
14162
14163 if (!can_plt_call && h != NULL)
14164 {
14165 const char *name = h->elf.root.root.string;
14166
14167 if (*name == '.')
14168 ++name;
14169
14170 if (strncmp (name, "__libc_start_main", 17) == 0
14171 && (name[17] == 0 || name[17] == '@'))
14172 {
14173 /* Allow crt1 branch to go via a toc adjusting
14174 stub. Other calls that never return could do
14175 the same, if we could detect such. */
14176 can_plt_call = TRUE;
14177 }
14178 }
14179
14180 if (!can_plt_call)
14181 {
14182 /* g++ as of 20130507 emits self-calls without a
14183 following nop. This is arguably wrong since we
14184 have conflicting information. On the one hand a
14185 global symbol and on the other a local call
14186 sequence, but don't error for this special case.
14187 It isn't possible to cheaply verify we have
14188 exactly such a call. Allow all calls to the same
14189 section. */
14190 asection *code_sec = sec;
14191
14192 if (get_opd_info (sec) != NULL)
14193 {
14194 bfd_vma off = (relocation + addend
14195 - sec->output_section->vma
14196 - sec->output_offset);
14197
14198 opd_entry_value (sec, off, &code_sec, NULL, FALSE);
14199 }
14200 if (code_sec == input_section)
14201 can_plt_call = TRUE;
14202 }
14203
14204 if (!can_plt_call)
14205 {
14206 if (stub_entry->stub_type == ppc_stub_plt_call
14207 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14208 info->callbacks->einfo
14209 /* xgettext:c-format */
14210 (_("%H: call to `%T' lacks nop, can't restore toc; "
14211 "recompile with -fPIC\n"),
14212 input_bfd, input_section, rel->r_offset, sym_name);
14213 else
14214 info->callbacks->einfo
14215 /* xgettext:c-format */
14216 (_("%H: call to `%T' lacks nop, can't restore toc; "
14217 "(-mcmodel=small toc adjust stub)\n"),
14218 input_bfd, input_section, rel->r_offset, sym_name);
14219
14220 bfd_set_error (bfd_error_bad_value);
14221 ret = FALSE;
14222 }
14223
14224 if (can_plt_call
14225 && (stub_entry->stub_type == ppc_stub_plt_call
14226 || stub_entry->stub_type == ppc_stub_plt_call_r2save))
14227 unresolved_reloc = FALSE;
14228 }
14229
14230 if ((stub_entry == NULL
14231 || stub_entry->stub_type == ppc_stub_long_branch
14232 || stub_entry->stub_type == ppc_stub_plt_branch)
14233 && get_opd_info (sec) != NULL)
14234 {
14235 /* The branch destination is the value of the opd entry. */
14236 bfd_vma off = (relocation + addend
14237 - sec->output_section->vma
14238 - sec->output_offset);
14239 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL, FALSE);
14240 if (dest != (bfd_vma) -1)
14241 {
14242 relocation = dest;
14243 addend = 0;
14244 reloc_dest = DEST_OPD;
14245 }
14246 }
14247
14248 /* If the branch is out of reach we ought to have a long
14249 branch stub. */
14250 from = (rel->r_offset
14251 + input_section->output_offset
14252 + input_section->output_section->vma);
14253
14254 relocation += PPC64_LOCAL_ENTRY_OFFSET (fdh
14255 ? fdh->elf.other
14256 : sym->st_other);
14257
14258 if (stub_entry != NULL
14259 && (stub_entry->stub_type == ppc_stub_long_branch
14260 || stub_entry->stub_type == ppc_stub_plt_branch)
14261 && (r_type == R_PPC64_ADDR14_BRTAKEN
14262 || r_type == R_PPC64_ADDR14_BRNTAKEN
14263 || (relocation + addend - from + max_br_offset
14264 < 2 * max_br_offset)))
14265 /* Don't use the stub if this branch is in range. */
14266 stub_entry = NULL;
14267
14268 if (stub_entry != NULL)
14269 {
14270 /* Munge up the value and addend so that we call the stub
14271 rather than the procedure directly. */
14272 asection *stub_sec = stub_entry->group->stub_sec;
14273
14274 if (stub_entry->stub_type == ppc_stub_save_res)
14275 relocation += (stub_sec->output_offset
14276 + stub_sec->output_section->vma
14277 + stub_sec->size - htab->sfpr->size
14278 - htab->sfpr->output_offset
14279 - htab->sfpr->output_section->vma);
14280 else
14281 relocation = (stub_entry->stub_offset
14282 + stub_sec->output_offset
14283 + stub_sec->output_section->vma);
14284 addend = 0;
14285 reloc_dest = DEST_STUB;
14286
14287 if ((stub_entry->stub_type == ppc_stub_plt_call
14288 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14289 && (ALWAYS_EMIT_R2SAVE
14290 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14291 && rel + 1 < relend
14292 && rel[1].r_offset == rel->r_offset + 4
14293 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOCSAVE)
14294 relocation += 4;
14295 }
14296
14297 if (insn != 0)
14298 {
14299 if (is_isa_v2)
14300 {
14301 /* Set 'a' bit. This is 0b00010 in BO field for branch
14302 on CR(BI) insns (BO == 001at or 011at), and 0b01000
14303 for branch on CTR insns (BO == 1a00t or 1a01t). */
14304 if ((insn & (0x14 << 21)) == (0x04 << 21))
14305 insn |= 0x02 << 21;
14306 else if ((insn & (0x14 << 21)) == (0x10 << 21))
14307 insn |= 0x08 << 21;
14308 else
14309 break;
14310 }
14311 else
14312 {
14313 /* Invert 'y' bit if not the default. */
14314 if ((bfd_signed_vma) (relocation + addend - from) < 0)
14315 insn ^= 0x01 << 21;
14316 }
14317
14318 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
14319 }
14320
14321 /* NOP out calls to undefined weak functions.
14322 We can thus call a weak function without first
14323 checking whether the function is defined. */
14324 else if (h != NULL
14325 && h->elf.root.type == bfd_link_hash_undefweak
14326 && h->elf.dynindx == -1
14327 && r_type == R_PPC64_REL24
14328 && relocation == 0
14329 && addend == 0)
14330 {
14331 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
14332 goto copy_reloc;
14333 }
14334 break;
14335 }
14336
14337 /* Set `addend'. */
14338 tls_type = 0;
14339 switch (r_type)
14340 {
14341 default:
14342 info->callbacks->einfo
14343 /* xgettext:c-format */
14344 (_("%P: %B: unknown relocation type %d for `%T'\n"),
14345 input_bfd, (int) r_type, sym_name);
14346
14347 bfd_set_error (bfd_error_bad_value);
14348 ret = FALSE;
14349 goto copy_reloc;
14350
14351 case R_PPC64_NONE:
14352 case R_PPC64_TLS:
14353 case R_PPC64_TLSGD:
14354 case R_PPC64_TLSLD:
14355 case R_PPC64_TOCSAVE:
14356 case R_PPC64_GNU_VTINHERIT:
14357 case R_PPC64_GNU_VTENTRY:
14358 case R_PPC64_ENTRY:
14359 goto copy_reloc;
14360
14361 /* GOT16 relocations. Like an ADDR16 using the symbol's
14362 address in the GOT as relocation value instead of the
14363 symbol's value itself. Also, create a GOT entry for the
14364 symbol and put the symbol value there. */
14365 case R_PPC64_GOT_TLSGD16:
14366 case R_PPC64_GOT_TLSGD16_LO:
14367 case R_PPC64_GOT_TLSGD16_HI:
14368 case R_PPC64_GOT_TLSGD16_HA:
14369 tls_type = TLS_TLS | TLS_GD;
14370 goto dogot;
14371
14372 case R_PPC64_GOT_TLSLD16:
14373 case R_PPC64_GOT_TLSLD16_LO:
14374 case R_PPC64_GOT_TLSLD16_HI:
14375 case R_PPC64_GOT_TLSLD16_HA:
14376 tls_type = TLS_TLS | TLS_LD;
14377 goto dogot;
14378
14379 case R_PPC64_GOT_TPREL16_DS:
14380 case R_PPC64_GOT_TPREL16_LO_DS:
14381 case R_PPC64_GOT_TPREL16_HI:
14382 case R_PPC64_GOT_TPREL16_HA:
14383 tls_type = TLS_TLS | TLS_TPREL;
14384 goto dogot;
14385
14386 case R_PPC64_GOT_DTPREL16_DS:
14387 case R_PPC64_GOT_DTPREL16_LO_DS:
14388 case R_PPC64_GOT_DTPREL16_HI:
14389 case R_PPC64_GOT_DTPREL16_HA:
14390 tls_type = TLS_TLS | TLS_DTPREL;
14391 goto dogot;
14392
14393 case R_PPC64_GOT16:
14394 case R_PPC64_GOT16_LO:
14395 case R_PPC64_GOT16_HI:
14396 case R_PPC64_GOT16_HA:
14397 case R_PPC64_GOT16_DS:
14398 case R_PPC64_GOT16_LO_DS:
14399 dogot:
14400 {
14401 /* Relocation is to the entry for this symbol in the global
14402 offset table. */
14403 asection *got;
14404 bfd_vma *offp;
14405 bfd_vma off;
14406 unsigned long indx = 0;
14407 struct got_entry *ent;
14408
14409 if (tls_type == (TLS_TLS | TLS_LD)
14410 && (h == NULL
14411 || !h->elf.def_dynamic))
14412 ent = ppc64_tlsld_got (input_bfd);
14413 else
14414 {
14415 if (h != NULL)
14416 {
14417 if (!htab->elf.dynamic_sections_created
14418 || h->elf.dynindx == -1
14419 || SYMBOL_REFERENCES_LOCAL (info, &h->elf)
14420 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, &h->elf))
14421 /* This is actually a static link, or it is a
14422 -Bsymbolic link and the symbol is defined
14423 locally, or the symbol was forced to be local
14424 because of a version file. */
14425 ;
14426 else
14427 {
14428 indx = h->elf.dynindx;
14429 unresolved_reloc = FALSE;
14430 }
14431 ent = h->elf.got.glist;
14432 }
14433 else
14434 {
14435 if (local_got_ents == NULL)
14436 abort ();
14437 ent = local_got_ents[r_symndx];
14438 }
14439
14440 for (; ent != NULL; ent = ent->next)
14441 if (ent->addend == orig_rel.r_addend
14442 && ent->owner == input_bfd
14443 && ent->tls_type == tls_type)
14444 break;
14445 }
14446
14447 if (ent == NULL)
14448 abort ();
14449 if (ent->is_indirect)
14450 ent = ent->got.ent;
14451 offp = &ent->got.offset;
14452 got = ppc64_elf_tdata (ent->owner)->got;
14453 if (got == NULL)
14454 abort ();
14455
14456 /* The offset must always be a multiple of 8. We use the
14457 least significant bit to record whether we have already
14458 processed this entry. */
14459 off = *offp;
14460 if ((off & 1) != 0)
14461 off &= ~1;
14462 else
14463 {
14464 /* Generate relocs for the dynamic linker, except in
14465 the case of TLSLD where we'll use one entry per
14466 module. */
14467 asection *relgot;
14468 bfd_boolean ifunc;
14469
14470 *offp = off | 1;
14471 relgot = NULL;
14472 ifunc = (h != NULL
14473 ? h->elf.type == STT_GNU_IFUNC
14474 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC);
14475 if (ifunc)
14476 {
14477 relgot = htab->elf.irelplt;
14478 if (indx == 0)
14479 htab->local_ifunc_resolver = 1;
14480 else if (is_static_defined (&h->elf))
14481 htab->maybe_local_ifunc_resolver = 1;
14482 }
14483 else if (indx != 0
14484 || (bfd_link_pic (info)
14485 && (h == NULL
14486 || !UNDEFWEAK_NO_DYNAMIC_RELOC (info, &h->elf)
14487 || (tls_type == (TLS_TLS | TLS_LD)
14488 && !h->elf.def_dynamic))))
14489 relgot = ppc64_elf_tdata (ent->owner)->relgot;
14490 if (relgot != NULL)
14491 {
14492 outrel.r_offset = (got->output_section->vma
14493 + got->output_offset
14494 + off);
14495 outrel.r_addend = addend;
14496 if (tls_type & (TLS_LD | TLS_GD))
14497 {
14498 outrel.r_addend = 0;
14499 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
14500 if (tls_type == (TLS_TLS | TLS_GD))
14501 {
14502 loc = relgot->contents;
14503 loc += (relgot->reloc_count++
14504 * sizeof (Elf64_External_Rela));
14505 bfd_elf64_swap_reloca_out (output_bfd,
14506 &outrel, loc);
14507 outrel.r_offset += 8;
14508 outrel.r_addend = addend;
14509 outrel.r_info
14510 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
14511 }
14512 }
14513 else if (tls_type == (TLS_TLS | TLS_DTPREL))
14514 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
14515 else if (tls_type == (TLS_TLS | TLS_TPREL))
14516 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
14517 else if (indx != 0)
14518 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
14519 else
14520 {
14521 if (ifunc)
14522 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
14523 else
14524 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
14525
14526 /* Write the .got section contents for the sake
14527 of prelink. */
14528 loc = got->contents + off;
14529 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
14530 loc);
14531 }
14532
14533 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
14534 {
14535 outrel.r_addend += relocation;
14536 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
14537 {
14538 if (htab->elf.tls_sec == NULL)
14539 outrel.r_addend = 0;
14540 else
14541 outrel.r_addend -= htab->elf.tls_sec->vma;
14542 }
14543 }
14544 loc = relgot->contents;
14545 loc += (relgot->reloc_count++
14546 * sizeof (Elf64_External_Rela));
14547 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
14548 }
14549
14550 /* Init the .got section contents here if we're not
14551 emitting a reloc. */
14552 else
14553 {
14554 relocation += addend;
14555 if (tls_type != 0)
14556 {
14557 if (htab->elf.tls_sec == NULL)
14558 relocation = 0;
14559 else
14560 {
14561 if (tls_type & TLS_LD)
14562 relocation = 0;
14563 else
14564 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
14565 if (tls_type & TLS_TPREL)
14566 relocation += DTP_OFFSET - TP_OFFSET;
14567 }
14568
14569 if (tls_type & (TLS_GD | TLS_LD))
14570 {
14571 bfd_put_64 (output_bfd, relocation,
14572 got->contents + off + 8);
14573 relocation = 1;
14574 }
14575 }
14576 bfd_put_64 (output_bfd, relocation,
14577 got->contents + off);
14578 }
14579 }
14580
14581 if (off >= (bfd_vma) -2)
14582 abort ();
14583
14584 relocation = got->output_section->vma + got->output_offset + off;
14585 addend = -(TOCstart + htab->sec_info[input_section->id].toc_off);
14586 }
14587 break;
14588
14589 case R_PPC64_PLT16_HA:
14590 case R_PPC64_PLT16_HI:
14591 case R_PPC64_PLT16_LO:
14592 case R_PPC64_PLT32:
14593 case R_PPC64_PLT64:
14594 /* Relocation is to the entry for this symbol in the
14595 procedure linkage table. */
14596 {
14597 struct plt_entry **plt_list = NULL;
14598 if (h != NULL)
14599 plt_list = &h->elf.plt.plist;
14600 else if (local_got_ents != NULL)
14601 {
14602 struct plt_entry **local_plt = (struct plt_entry **)
14603 (local_got_ents + symtab_hdr->sh_info);
14604 unsigned char *local_got_tls_masks = (unsigned char *)
14605 (local_plt + symtab_hdr->sh_info);
14606 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
14607 plt_list = local_plt + r_symndx;
14608 }
14609 if (plt_list)
14610 {
14611 struct plt_entry *ent;
14612
14613 for (ent = *plt_list; ent != NULL; ent = ent->next)
14614 if (ent->plt.offset != (bfd_vma) -1
14615 && ent->addend == orig_rel.r_addend)
14616 {
14617 asection *plt;
14618
14619 plt = htab->elf.splt;
14620 if (!htab->elf.dynamic_sections_created
14621 || h == NULL
14622 || h->elf.dynindx == -1)
14623 plt = htab->elf.iplt;
14624 relocation = (plt->output_section->vma
14625 + plt->output_offset
14626 + ent->plt.offset);
14627 addend = 0;
14628 unresolved_reloc = FALSE;
14629 break;
14630 }
14631 }
14632 }
14633 break;
14634
14635 case R_PPC64_TOC:
14636 /* Relocation value is TOC base. */
14637 relocation = TOCstart;
14638 if (r_symndx == STN_UNDEF)
14639 relocation += htab->sec_info[input_section->id].toc_off;
14640 else if (unresolved_reloc)
14641 ;
14642 else if (sec != NULL && sec->id < htab->sec_info_arr_size)
14643 relocation += htab->sec_info[sec->id].toc_off;
14644 else
14645 unresolved_reloc = TRUE;
14646 goto dodyn;
14647
14648 /* TOC16 relocs. We want the offset relative to the TOC base,
14649 which is the address of the start of the TOC plus 0x8000.
14650 The TOC consists of sections .got, .toc, .tocbss, and .plt,
14651 in this order. */
14652 case R_PPC64_TOC16:
14653 case R_PPC64_TOC16_LO:
14654 case R_PPC64_TOC16_HI:
14655 case R_PPC64_TOC16_DS:
14656 case R_PPC64_TOC16_LO_DS:
14657 case R_PPC64_TOC16_HA:
14658 addend -= TOCstart + htab->sec_info[input_section->id].toc_off;
14659 break;
14660
14661 /* Relocate against the beginning of the section. */
14662 case R_PPC64_SECTOFF:
14663 case R_PPC64_SECTOFF_LO:
14664 case R_PPC64_SECTOFF_HI:
14665 case R_PPC64_SECTOFF_DS:
14666 case R_PPC64_SECTOFF_LO_DS:
14667 case R_PPC64_SECTOFF_HA:
14668 if (sec != NULL)
14669 addend -= sec->output_section->vma;
14670 break;
14671
14672 case R_PPC64_REL16:
14673 case R_PPC64_REL16_LO:
14674 case R_PPC64_REL16_HI:
14675 case R_PPC64_REL16_HA:
14676 case R_PPC64_REL16DX_HA:
14677 break;
14678
14679 case R_PPC64_REL14:
14680 case R_PPC64_REL14_BRNTAKEN:
14681 case R_PPC64_REL14_BRTAKEN:
14682 case R_PPC64_REL24:
14683 break;
14684
14685 case R_PPC64_TPREL16:
14686 case R_PPC64_TPREL16_LO:
14687 case R_PPC64_TPREL16_HI:
14688 case R_PPC64_TPREL16_HA:
14689 case R_PPC64_TPREL16_DS:
14690 case R_PPC64_TPREL16_LO_DS:
14691 case R_PPC64_TPREL16_HIGH:
14692 case R_PPC64_TPREL16_HIGHA:
14693 case R_PPC64_TPREL16_HIGHER:
14694 case R_PPC64_TPREL16_HIGHERA:
14695 case R_PPC64_TPREL16_HIGHEST:
14696 case R_PPC64_TPREL16_HIGHESTA:
14697 if (h != NULL
14698 && h->elf.root.type == bfd_link_hash_undefweak
14699 && h->elf.dynindx == -1)
14700 {
14701 /* Make this relocation against an undefined weak symbol
14702 resolve to zero. This is really just a tweak, since
14703 code using weak externs ought to check that they are
14704 defined before using them. */
14705 bfd_byte *p = contents + rel->r_offset - d_offset;
14706
14707 insn = bfd_get_32 (input_bfd, p);
14708 insn = _bfd_elf_ppc_at_tprel_transform (insn, 13);
14709 if (insn != 0)
14710 bfd_put_32 (input_bfd, insn, p);
14711 break;
14712 }
14713 if (htab->elf.tls_sec != NULL)
14714 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
14715 /* The TPREL16 relocs shouldn't really be used in shared
14716 libs or with non-local symbols as that will result in
14717 DT_TEXTREL being set, but support them anyway. */
14718 goto dodyn;
14719
14720 case R_PPC64_DTPREL16:
14721 case R_PPC64_DTPREL16_LO:
14722 case R_PPC64_DTPREL16_HI:
14723 case R_PPC64_DTPREL16_HA:
14724 case R_PPC64_DTPREL16_DS:
14725 case R_PPC64_DTPREL16_LO_DS:
14726 case R_PPC64_DTPREL16_HIGH:
14727 case R_PPC64_DTPREL16_HIGHA:
14728 case R_PPC64_DTPREL16_HIGHER:
14729 case R_PPC64_DTPREL16_HIGHERA:
14730 case R_PPC64_DTPREL16_HIGHEST:
14731 case R_PPC64_DTPREL16_HIGHESTA:
14732 if (htab->elf.tls_sec != NULL)
14733 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
14734 break;
14735
14736 case R_PPC64_ADDR64_LOCAL:
14737 addend += PPC64_LOCAL_ENTRY_OFFSET (h != NULL
14738 ? h->elf.other
14739 : sym->st_other);
14740 break;
14741
14742 case R_PPC64_DTPMOD64:
14743 relocation = 1;
14744 addend = 0;
14745 goto dodyn;
14746
14747 case R_PPC64_TPREL64:
14748 if (htab->elf.tls_sec != NULL)
14749 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
14750 goto dodyn;
14751
14752 case R_PPC64_DTPREL64:
14753 if (htab->elf.tls_sec != NULL)
14754 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
14755 /* Fall through. */
14756
14757 /* Relocations that may need to be propagated if this is a
14758 dynamic object. */
14759 case R_PPC64_REL30:
14760 case R_PPC64_REL32:
14761 case R_PPC64_REL64:
14762 case R_PPC64_ADDR14:
14763 case R_PPC64_ADDR14_BRNTAKEN:
14764 case R_PPC64_ADDR14_BRTAKEN:
14765 case R_PPC64_ADDR16:
14766 case R_PPC64_ADDR16_DS:
14767 case R_PPC64_ADDR16_HA:
14768 case R_PPC64_ADDR16_HI:
14769 case R_PPC64_ADDR16_HIGH:
14770 case R_PPC64_ADDR16_HIGHA:
14771 case R_PPC64_ADDR16_HIGHER:
14772 case R_PPC64_ADDR16_HIGHERA:
14773 case R_PPC64_ADDR16_HIGHEST:
14774 case R_PPC64_ADDR16_HIGHESTA:
14775 case R_PPC64_ADDR16_LO:
14776 case R_PPC64_ADDR16_LO_DS:
14777 case R_PPC64_ADDR24:
14778 case R_PPC64_ADDR32:
14779 case R_PPC64_ADDR64:
14780 case R_PPC64_UADDR16:
14781 case R_PPC64_UADDR32:
14782 case R_PPC64_UADDR64:
14783 dodyn:
14784 if ((input_section->flags & SEC_ALLOC) == 0)
14785 break;
14786
14787 if (NO_OPD_RELOCS && is_opd)
14788 break;
14789
14790 if (bfd_link_pic (info)
14791 ? ((h == NULL
14792 || h->dyn_relocs != NULL)
14793 && ((h != NULL && pc_dynrelocs (h))
14794 || must_be_dyn_reloc (info, r_type)))
14795 : (h != NULL
14796 ? h->dyn_relocs != NULL
14797 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
14798 {
14799 bfd_boolean skip, relocate;
14800 asection *sreloc;
14801 bfd_vma out_off;
14802 long indx = 0;
14803
14804 /* When generating a dynamic object, these relocations
14805 are copied into the output file to be resolved at run
14806 time. */
14807
14808 skip = FALSE;
14809 relocate = FALSE;
14810
14811 out_off = _bfd_elf_section_offset (output_bfd, info,
14812 input_section, rel->r_offset);
14813 if (out_off == (bfd_vma) -1)
14814 skip = TRUE;
14815 else if (out_off == (bfd_vma) -2)
14816 skip = TRUE, relocate = TRUE;
14817 out_off += (input_section->output_section->vma
14818 + input_section->output_offset);
14819 outrel.r_offset = out_off;
14820 outrel.r_addend = rel->r_addend;
14821
14822 /* Optimize unaligned reloc use. */
14823 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
14824 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
14825 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
14826 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
14827 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
14828 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
14829 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
14830 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
14831 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
14832
14833 if (skip)
14834 memset (&outrel, 0, sizeof outrel);
14835 else if (!SYMBOL_REFERENCES_LOCAL (info, &h->elf)
14836 && !is_opd
14837 && r_type != R_PPC64_TOC)
14838 {
14839 indx = h->elf.dynindx;
14840 BFD_ASSERT (indx != -1);
14841 outrel.r_info = ELF64_R_INFO (indx, r_type);
14842 }
14843 else
14844 {
14845 /* This symbol is local, or marked to become local,
14846 or this is an opd section reloc which must point
14847 at a local function. */
14848 outrel.r_addend += relocation;
14849 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
14850 {
14851 if (is_opd && h != NULL)
14852 {
14853 /* Lie about opd entries. This case occurs
14854 when building shared libraries and we
14855 reference a function in another shared
14856 lib. The same thing happens for a weak
14857 definition in an application that's
14858 overridden by a strong definition in a
14859 shared lib. (I believe this is a generic
14860 bug in binutils handling of weak syms.)
14861 In these cases we won't use the opd
14862 entry in this lib. */
14863 unresolved_reloc = FALSE;
14864 }
14865 if (!is_opd
14866 && r_type == R_PPC64_ADDR64
14867 && (h != NULL
14868 ? h->elf.type == STT_GNU_IFUNC
14869 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
14870 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
14871 else
14872 {
14873 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
14874
14875 /* We need to relocate .opd contents for ld.so.
14876 Prelink also wants simple and consistent rules
14877 for relocs. This make all RELATIVE relocs have
14878 *r_offset equal to r_addend. */
14879 relocate = TRUE;
14880 }
14881 }
14882 else
14883 {
14884 if (h != NULL
14885 ? h->elf.type == STT_GNU_IFUNC
14886 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
14887 {
14888 info->callbacks->einfo
14889 /* xgettext:c-format */
14890 (_("%H: %s for indirect "
14891 "function `%T' unsupported\n"),
14892 input_bfd, input_section, rel->r_offset,
14893 ppc64_elf_howto_table[r_type]->name,
14894 sym_name);
14895 ret = FALSE;
14896 }
14897 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
14898 ;
14899 else if (sec == NULL || sec->owner == NULL)
14900 {
14901 bfd_set_error (bfd_error_bad_value);
14902 return FALSE;
14903 }
14904 else
14905 {
14906 asection *osec;
14907
14908 osec = sec->output_section;
14909 indx = elf_section_data (osec)->dynindx;
14910
14911 if (indx == 0)
14912 {
14913 if ((osec->flags & SEC_READONLY) == 0
14914 && htab->elf.data_index_section != NULL)
14915 osec = htab->elf.data_index_section;
14916 else
14917 osec = htab->elf.text_index_section;
14918 indx = elf_section_data (osec)->dynindx;
14919 }
14920 BFD_ASSERT (indx != 0);
14921
14922 /* We are turning this relocation into one
14923 against a section symbol, so subtract out
14924 the output section's address but not the
14925 offset of the input section in the output
14926 section. */
14927 outrel.r_addend -= osec->vma;
14928 }
14929
14930 outrel.r_info = ELF64_R_INFO (indx, r_type);
14931 }
14932 }
14933
14934 sreloc = elf_section_data (input_section)->sreloc;
14935 if (h != NULL
14936 ? h->elf.type == STT_GNU_IFUNC
14937 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
14938 {
14939 sreloc = htab->elf.irelplt;
14940 if (indx == 0)
14941 htab->local_ifunc_resolver = 1;
14942 else if (is_static_defined (&h->elf))
14943 htab->maybe_local_ifunc_resolver = 1;
14944 }
14945 if (sreloc == NULL)
14946 abort ();
14947
14948 if (sreloc->reloc_count * sizeof (Elf64_External_Rela)
14949 >= sreloc->size)
14950 abort ();
14951 loc = sreloc->contents;
14952 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
14953 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
14954
14955 /* If this reloc is against an external symbol, it will
14956 be computed at runtime, so there's no need to do
14957 anything now. However, for the sake of prelink ensure
14958 that the section contents are a known value. */
14959 if (! relocate)
14960 {
14961 unresolved_reloc = FALSE;
14962 /* The value chosen here is quite arbitrary as ld.so
14963 ignores section contents except for the special
14964 case of .opd where the contents might be accessed
14965 before relocation. Choose zero, as that won't
14966 cause reloc overflow. */
14967 relocation = 0;
14968 addend = 0;
14969 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
14970 to improve backward compatibility with older
14971 versions of ld. */
14972 if (r_type == R_PPC64_ADDR64)
14973 addend = outrel.r_addend;
14974 /* Adjust pc_relative relocs to have zero in *r_offset. */
14975 else if (ppc64_elf_howto_table[r_type]->pc_relative)
14976 addend = outrel.r_offset;
14977 }
14978 }
14979 break;
14980
14981 case R_PPC64_COPY:
14982 case R_PPC64_GLOB_DAT:
14983 case R_PPC64_JMP_SLOT:
14984 case R_PPC64_JMP_IREL:
14985 case R_PPC64_RELATIVE:
14986 /* We shouldn't ever see these dynamic relocs in relocatable
14987 files. */
14988 /* Fall through. */
14989
14990 case R_PPC64_PLTGOT16:
14991 case R_PPC64_PLTGOT16_DS:
14992 case R_PPC64_PLTGOT16_HA:
14993 case R_PPC64_PLTGOT16_HI:
14994 case R_PPC64_PLTGOT16_LO:
14995 case R_PPC64_PLTGOT16_LO_DS:
14996 case R_PPC64_PLTREL32:
14997 case R_PPC64_PLTREL64:
14998 /* These ones haven't been implemented yet. */
14999
15000 info->callbacks->einfo
15001 /* xgettext:c-format */
15002 (_("%P: %B: %s is not supported for `%T'\n"),
15003 input_bfd,
15004 ppc64_elf_howto_table[r_type]->name, sym_name);
15005
15006 bfd_set_error (bfd_error_invalid_operation);
15007 ret = FALSE;
15008 goto copy_reloc;
15009 }
15010
15011 /* Multi-instruction sequences that access the TOC can be
15012 optimized, eg. addis ra,r2,0; addi rb,ra,x;
15013 to nop; addi rb,r2,x; */
15014 howto = ppc64_elf_howto_table[(int) r_type];
15015 switch (r_type)
15016 {
15017 default:
15018 break;
15019
15020 case R_PPC64_GOT_TLSLD16_HI:
15021 case R_PPC64_GOT_TLSGD16_HI:
15022 case R_PPC64_GOT_TPREL16_HI:
15023 case R_PPC64_GOT_DTPREL16_HI:
15024 case R_PPC64_GOT16_HI:
15025 case R_PPC64_TOC16_HI:
15026 /* These relocs would only be useful if building up an
15027 offset to later add to r2, perhaps in an indexed
15028 addressing mode instruction. Don't try to optimize.
15029 Unfortunately, the possibility of someone building up an
15030 offset like this or even with the HA relocs, means that
15031 we need to check the high insn when optimizing the low
15032 insn. */
15033 break;
15034
15035 case R_PPC64_GOT_TLSLD16_HA:
15036 case R_PPC64_GOT_TLSGD16_HA:
15037 case R_PPC64_GOT_TPREL16_HA:
15038 case R_PPC64_GOT_DTPREL16_HA:
15039 case R_PPC64_GOT16_HA:
15040 case R_PPC64_TOC16_HA:
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 bfd_put_32 (input_bfd, NOP, p);
15046 }
15047 break;
15048
15049 case R_PPC64_GOT_TLSLD16_LO:
15050 case R_PPC64_GOT_TLSGD16_LO:
15051 case R_PPC64_GOT_TPREL16_LO_DS:
15052 case R_PPC64_GOT_DTPREL16_LO_DS:
15053 case R_PPC64_GOT16_LO:
15054 case R_PPC64_GOT16_LO_DS:
15055 case R_PPC64_TOC16_LO:
15056 case R_PPC64_TOC16_LO_DS:
15057 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
15058 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
15059 {
15060 bfd_byte *p = contents + (rel->r_offset & ~3);
15061 insn = bfd_get_32 (input_bfd, p);
15062 if ((insn & (0x3f << 26)) == 12u << 26 /* addic */)
15063 {
15064 /* Transform addic to addi when we change reg. */
15065 insn &= ~((0x3f << 26) | (0x1f << 16));
15066 insn |= (14u << 26) | (2 << 16);
15067 }
15068 else
15069 {
15070 insn &= ~(0x1f << 16);
15071 insn |= 2 << 16;
15072 }
15073 bfd_put_32 (input_bfd, insn, p);
15074 }
15075 break;
15076
15077 case R_PPC64_TPREL16_HA:
15078 if (htab->do_tls_opt && relocation + addend + 0x8000 < 0x10000)
15079 {
15080 bfd_byte *p = contents + (rel->r_offset & ~3);
15081 insn = bfd_get_32 (input_bfd, p);
15082 if ((insn & ((0x3f << 26) | 0x1f << 16))
15083 != ((15u << 26) | (13 << 16)) /* addis rt,13,imm */)
15084 /* xgettext:c-format */
15085 info->callbacks->minfo
15086 (_("%H: warning: %s unexpected insn %#x.\n"),
15087 input_bfd, input_section, rel->r_offset, howto->name, insn);
15088 else
15089 bfd_put_32 (input_bfd, NOP, p);
15090 }
15091 break;
15092
15093 case R_PPC64_TPREL16_LO:
15094 case R_PPC64_TPREL16_LO_DS:
15095 if (htab->do_tls_opt && relocation + addend + 0x8000 < 0x10000)
15096 {
15097 bfd_byte *p = contents + (rel->r_offset & ~3);
15098 insn = bfd_get_32 (input_bfd, p);
15099 insn &= ~(0x1f << 16);
15100 insn |= 13 << 16;
15101 bfd_put_32 (input_bfd, insn, p);
15102 }
15103 break;
15104 }
15105
15106 /* Do any further special processing. */
15107 switch (r_type)
15108 {
15109 default:
15110 break;
15111
15112 case R_PPC64_REL16_HA:
15113 case R_PPC64_REL16DX_HA:
15114 case R_PPC64_ADDR16_HA:
15115 case R_PPC64_ADDR16_HIGHA:
15116 case R_PPC64_ADDR16_HIGHERA:
15117 case R_PPC64_ADDR16_HIGHESTA:
15118 case R_PPC64_TOC16_HA:
15119 case R_PPC64_SECTOFF_HA:
15120 case R_PPC64_TPREL16_HA:
15121 case R_PPC64_TPREL16_HIGHA:
15122 case R_PPC64_TPREL16_HIGHERA:
15123 case R_PPC64_TPREL16_HIGHESTA:
15124 case R_PPC64_DTPREL16_HA:
15125 case R_PPC64_DTPREL16_HIGHA:
15126 case R_PPC64_DTPREL16_HIGHERA:
15127 case R_PPC64_DTPREL16_HIGHESTA:
15128 /* It's just possible that this symbol is a weak symbol
15129 that's not actually defined anywhere. In that case,
15130 'sec' would be NULL, and we should leave the symbol
15131 alone (it will be set to zero elsewhere in the link). */
15132 if (sec == NULL)
15133 break;
15134 /* Fall through. */
15135
15136 case R_PPC64_GOT16_HA:
15137 case R_PPC64_PLTGOT16_HA:
15138 case R_PPC64_PLT16_HA:
15139 case R_PPC64_GOT_TLSGD16_HA:
15140 case R_PPC64_GOT_TLSLD16_HA:
15141 case R_PPC64_GOT_TPREL16_HA:
15142 case R_PPC64_GOT_DTPREL16_HA:
15143 /* Add 0x10000 if sign bit in 0:15 is set.
15144 Bits 0:15 are not used. */
15145 addend += 0x8000;
15146 break;
15147
15148 case R_PPC64_ADDR16_DS:
15149 case R_PPC64_ADDR16_LO_DS:
15150 case R_PPC64_GOT16_DS:
15151 case R_PPC64_GOT16_LO_DS:
15152 case R_PPC64_PLT16_LO_DS:
15153 case R_PPC64_SECTOFF_DS:
15154 case R_PPC64_SECTOFF_LO_DS:
15155 case R_PPC64_TOC16_DS:
15156 case R_PPC64_TOC16_LO_DS:
15157 case R_PPC64_PLTGOT16_DS:
15158 case R_PPC64_PLTGOT16_LO_DS:
15159 case R_PPC64_GOT_TPREL16_DS:
15160 case R_PPC64_GOT_TPREL16_LO_DS:
15161 case R_PPC64_GOT_DTPREL16_DS:
15162 case R_PPC64_GOT_DTPREL16_LO_DS:
15163 case R_PPC64_TPREL16_DS:
15164 case R_PPC64_TPREL16_LO_DS:
15165 case R_PPC64_DTPREL16_DS:
15166 case R_PPC64_DTPREL16_LO_DS:
15167 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
15168 mask = 3;
15169 /* If this reloc is against an lq, lxv, or stxv insn, then
15170 the value must be a multiple of 16. This is somewhat of
15171 a hack, but the "correct" way to do this by defining _DQ
15172 forms of all the _DS relocs bloats all reloc switches in
15173 this file. It doesn't make much sense to use these
15174 relocs in data, so testing the insn should be safe. */
15175 if ((insn & (0x3f << 26)) == (56u << 26)
15176 || ((insn & (0x3f << 26)) == (61u << 26) && (insn & 3) == 1))
15177 mask = 15;
15178 relocation += addend;
15179 addend = insn & (mask ^ 3);
15180 if ((relocation & mask) != 0)
15181 {
15182 relocation ^= relocation & mask;
15183 info->callbacks->einfo
15184 /* xgettext:c-format */
15185 (_("%H: error: %s not a multiple of %u\n"),
15186 input_bfd, input_section, rel->r_offset,
15187 howto->name,
15188 mask + 1);
15189 bfd_set_error (bfd_error_bad_value);
15190 ret = FALSE;
15191 goto copy_reloc;
15192 }
15193 break;
15194 }
15195
15196 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
15197 because such sections are not SEC_ALLOC and thus ld.so will
15198 not process them. */
15199 if (unresolved_reloc
15200 && !((input_section->flags & SEC_DEBUGGING) != 0
15201 && h->elf.def_dynamic)
15202 && _bfd_elf_section_offset (output_bfd, info, input_section,
15203 rel->r_offset) != (bfd_vma) -1)
15204 {
15205 info->callbacks->einfo
15206 /* xgettext:c-format */
15207 (_("%H: unresolvable %s against `%T'\n"),
15208 input_bfd, input_section, rel->r_offset,
15209 howto->name,
15210 h->elf.root.root.string);
15211 ret = FALSE;
15212 }
15213
15214 /* 16-bit fields in insns mostly have signed values, but a
15215 few insns have 16-bit unsigned values. Really, we should
15216 have different reloc types. */
15217 if (howto->complain_on_overflow != complain_overflow_dont
15218 && howto->dst_mask == 0xffff
15219 && (input_section->flags & SEC_CODE) != 0)
15220 {
15221 enum complain_overflow complain = complain_overflow_signed;
15222
15223 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
15224 if ((insn & (0x3f << 26)) == 10u << 26 /* cmpli */)
15225 complain = complain_overflow_bitfield;
15226 else if (howto->rightshift == 0
15227 ? ((insn & (0x3f << 26)) == 28u << 26 /* andi */
15228 || (insn & (0x3f << 26)) == 24u << 26 /* ori */
15229 || (insn & (0x3f << 26)) == 26u << 26 /* xori */)
15230 : ((insn & (0x3f << 26)) == 29u << 26 /* andis */
15231 || (insn & (0x3f << 26)) == 25u << 26 /* oris */
15232 || (insn & (0x3f << 26)) == 27u << 26 /* xoris */))
15233 complain = complain_overflow_unsigned;
15234 if (howto->complain_on_overflow != complain)
15235 {
15236 alt_howto = *howto;
15237 alt_howto.complain_on_overflow = complain;
15238 howto = &alt_howto;
15239 }
15240 }
15241
15242 if (r_type == R_PPC64_REL16DX_HA)
15243 {
15244 /* Split field reloc isn't handled by _bfd_final_link_relocate. */
15245 if (rel->r_offset + 4 > input_section->size)
15246 r = bfd_reloc_outofrange;
15247 else
15248 {
15249 relocation += addend;
15250 relocation -= (rel->r_offset
15251 + input_section->output_offset
15252 + input_section->output_section->vma);
15253 relocation = (bfd_signed_vma) relocation >> 16;
15254 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
15255 insn &= ~0x1fffc1;
15256 insn |= (relocation & 0xffc1) | ((relocation & 0x3e) << 15);
15257 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
15258 r = bfd_reloc_ok;
15259 if (relocation + 0x8000 > 0xffff)
15260 r = bfd_reloc_overflow;
15261 }
15262 }
15263 else
15264 r = _bfd_final_link_relocate (howto, input_bfd, input_section, contents,
15265 rel->r_offset, relocation, addend);
15266
15267 if (r != bfd_reloc_ok)
15268 {
15269 char *more_info = NULL;
15270 const char *reloc_name = howto->name;
15271
15272 if (reloc_dest != DEST_NORMAL)
15273 {
15274 more_info = bfd_malloc (strlen (reloc_name) + 8);
15275 if (more_info != NULL)
15276 {
15277 strcpy (more_info, reloc_name);
15278 strcat (more_info, (reloc_dest == DEST_OPD
15279 ? " (OPD)" : " (stub)"));
15280 reloc_name = more_info;
15281 }
15282 }
15283
15284 if (r == bfd_reloc_overflow)
15285 {
15286 /* On code like "if (foo) foo();" don't report overflow
15287 on a branch to zero when foo is undefined. */
15288 if (!warned
15289 && (reloc_dest == DEST_STUB
15290 || !(h != NULL
15291 && (h->elf.root.type == bfd_link_hash_undefweak
15292 || h->elf.root.type == bfd_link_hash_undefined)
15293 && is_branch_reloc (r_type))))
15294 info->callbacks->reloc_overflow (info, &h->elf.root,
15295 sym_name, reloc_name,
15296 orig_rel.r_addend,
15297 input_bfd, input_section,
15298 rel->r_offset);
15299 }
15300 else
15301 {
15302 info->callbacks->einfo
15303 /* xgettext:c-format */
15304 (_("%H: %s against `%T': error %d\n"),
15305 input_bfd, input_section, rel->r_offset,
15306 reloc_name, sym_name, (int) r);
15307 ret = FALSE;
15308 }
15309 if (more_info != NULL)
15310 free (more_info);
15311 }
15312 copy_reloc:
15313 if (wrel != rel)
15314 *wrel = *rel;
15315 }
15316
15317 if (wrel != rel)
15318 {
15319 Elf_Internal_Shdr *rel_hdr;
15320 size_t deleted = rel - wrel;
15321
15322 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
15323 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
15324 if (rel_hdr->sh_size == 0)
15325 {
15326 /* It is too late to remove an empty reloc section. Leave
15327 one NONE reloc.
15328 ??? What is wrong with an empty section??? */
15329 rel_hdr->sh_size = rel_hdr->sh_entsize;
15330 deleted -= 1;
15331 }
15332 rel_hdr = _bfd_elf_single_rel_hdr (input_section);
15333 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
15334 input_section->reloc_count -= deleted;
15335 }
15336
15337 /* If we're emitting relocations, then shortly after this function
15338 returns, reloc offsets and addends for this section will be
15339 adjusted. Worse, reloc symbol indices will be for the output
15340 file rather than the input. Save a copy of the relocs for
15341 opd_entry_value. */
15342 if (is_opd && (info->emitrelocations || bfd_link_relocatable (info)))
15343 {
15344 bfd_size_type amt;
15345 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
15346 rel = bfd_alloc (input_bfd, amt);
15347 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd.relocs == NULL);
15348 ppc64_elf_tdata (input_bfd)->opd.relocs = rel;
15349 if (rel == NULL)
15350 return FALSE;
15351 memcpy (rel, relocs, amt);
15352 }
15353 return ret;
15354 }
15355
15356 /* Adjust the value of any local symbols in opd sections. */
15357
15358 static int
15359 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
15360 const char *name ATTRIBUTE_UNUSED,
15361 Elf_Internal_Sym *elfsym,
15362 asection *input_sec,
15363 struct elf_link_hash_entry *h)
15364 {
15365 struct _opd_sec_data *opd;
15366 long adjust;
15367 bfd_vma value;
15368
15369 if (h != NULL)
15370 return 1;
15371
15372 opd = get_opd_info (input_sec);
15373 if (opd == NULL || opd->adjust == NULL)
15374 return 1;
15375
15376 value = elfsym->st_value - input_sec->output_offset;
15377 if (!bfd_link_relocatable (info))
15378 value -= input_sec->output_section->vma;
15379
15380 adjust = opd->adjust[OPD_NDX (value)];
15381 if (adjust == -1)
15382 return 2;
15383
15384 elfsym->st_value += adjust;
15385 return 1;
15386 }
15387
15388 /* Finish up dynamic symbol handling. We set the contents of various
15389 dynamic sections here. */
15390
15391 static bfd_boolean
15392 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
15393 struct bfd_link_info *info,
15394 struct elf_link_hash_entry *h,
15395 Elf_Internal_Sym *sym)
15396 {
15397 struct ppc_link_hash_table *htab;
15398 struct plt_entry *ent;
15399 Elf_Internal_Rela rela;
15400 bfd_byte *loc;
15401
15402 htab = ppc_hash_table (info);
15403 if (htab == NULL)
15404 return FALSE;
15405
15406 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
15407 if (ent->plt.offset != (bfd_vma) -1)
15408 {
15409 /* This symbol has an entry in the procedure linkage
15410 table. Set it up. */
15411 if (!htab->elf.dynamic_sections_created
15412 || h->dynindx == -1)
15413 {
15414 BFD_ASSERT (h->type == STT_GNU_IFUNC
15415 && h->def_regular
15416 && (h->root.type == bfd_link_hash_defined
15417 || h->root.type == bfd_link_hash_defweak));
15418 rela.r_offset = (htab->elf.iplt->output_section->vma
15419 + htab->elf.iplt->output_offset
15420 + ent->plt.offset);
15421 if (htab->opd_abi)
15422 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
15423 else
15424 rela.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
15425 rela.r_addend = (h->root.u.def.value
15426 + h->root.u.def.section->output_offset
15427 + h->root.u.def.section->output_section->vma
15428 + ent->addend);
15429 loc = (htab->elf.irelplt->contents
15430 + (htab->elf.irelplt->reloc_count++
15431 * sizeof (Elf64_External_Rela)));
15432 htab->local_ifunc_resolver = 1;
15433 }
15434 else
15435 {
15436 rela.r_offset = (htab->elf.splt->output_section->vma
15437 + htab->elf.splt->output_offset
15438 + ent->plt.offset);
15439 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
15440 rela.r_addend = ent->addend;
15441 loc = (htab->elf.srelplt->contents
15442 + ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE (htab))
15443 / PLT_ENTRY_SIZE (htab) * sizeof (Elf64_External_Rela)));
15444 if (h->type == STT_GNU_IFUNC && is_static_defined (h))
15445 htab->maybe_local_ifunc_resolver = 1;
15446 }
15447 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
15448
15449 if (!htab->opd_abi)
15450 {
15451 if (!h->def_regular)
15452 {
15453 /* Mark the symbol as undefined, rather than as
15454 defined in glink. Leave the value if there were
15455 any relocations where pointer equality matters
15456 (this is a clue for the dynamic linker, to make
15457 function pointer comparisons work between an
15458 application and shared library), otherwise set it
15459 to zero. */
15460 sym->st_shndx = SHN_UNDEF;
15461 if (!h->pointer_equality_needed)
15462 sym->st_value = 0;
15463 else if (!h->ref_regular_nonweak)
15464 {
15465 /* This breaks function pointer comparisons, but
15466 that is better than breaking tests for a NULL
15467 function pointer. */
15468 sym->st_value = 0;
15469 }
15470 }
15471 }
15472 }
15473
15474 if (h->needs_copy)
15475 {
15476 /* This symbol needs a copy reloc. Set it up. */
15477 asection *srel;
15478
15479 if (h->dynindx == -1
15480 || (h->root.type != bfd_link_hash_defined
15481 && h->root.type != bfd_link_hash_defweak)
15482 || htab->elf.srelbss == NULL
15483 || htab->elf.sreldynrelro == NULL)
15484 abort ();
15485
15486 rela.r_offset = (h->root.u.def.value
15487 + h->root.u.def.section->output_section->vma
15488 + h->root.u.def.section->output_offset);
15489 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
15490 rela.r_addend = 0;
15491 if (h->root.u.def.section == htab->elf.sdynrelro)
15492 srel = htab->elf.sreldynrelro;
15493 else
15494 srel = htab->elf.srelbss;
15495 loc = srel->contents;
15496 loc += srel->reloc_count++ * sizeof (Elf64_External_Rela);
15497 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
15498 }
15499
15500 return TRUE;
15501 }
15502
15503 /* Used to decide how to sort relocs in an optimal manner for the
15504 dynamic linker, before writing them out. */
15505
15506 static enum elf_reloc_type_class
15507 ppc64_elf_reloc_type_class (const struct bfd_link_info *info,
15508 const asection *rel_sec,
15509 const Elf_Internal_Rela *rela)
15510 {
15511 enum elf_ppc64_reloc_type r_type;
15512 struct ppc_link_hash_table *htab = ppc_hash_table (info);
15513
15514 if (rel_sec == htab->elf.irelplt)
15515 return reloc_class_ifunc;
15516
15517 r_type = ELF64_R_TYPE (rela->r_info);
15518 switch (r_type)
15519 {
15520 case R_PPC64_RELATIVE:
15521 return reloc_class_relative;
15522 case R_PPC64_JMP_SLOT:
15523 return reloc_class_plt;
15524 case R_PPC64_COPY:
15525 return reloc_class_copy;
15526 default:
15527 return reloc_class_normal;
15528 }
15529 }
15530
15531 /* Finish up the dynamic sections. */
15532
15533 static bfd_boolean
15534 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
15535 struct bfd_link_info *info)
15536 {
15537 struct ppc_link_hash_table *htab;
15538 bfd *dynobj;
15539 asection *sdyn;
15540
15541 htab = ppc_hash_table (info);
15542 if (htab == NULL)
15543 return FALSE;
15544
15545 dynobj = htab->elf.dynobj;
15546 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
15547
15548 if (htab->elf.dynamic_sections_created)
15549 {
15550 Elf64_External_Dyn *dyncon, *dynconend;
15551
15552 if (sdyn == NULL || htab->elf.sgot == NULL)
15553 abort ();
15554
15555 dyncon = (Elf64_External_Dyn *) sdyn->contents;
15556 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
15557 for (; dyncon < dynconend; dyncon++)
15558 {
15559 Elf_Internal_Dyn dyn;
15560 asection *s;
15561
15562 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
15563
15564 switch (dyn.d_tag)
15565 {
15566 default:
15567 continue;
15568
15569 case DT_PPC64_GLINK:
15570 s = htab->glink;
15571 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15572 /* We stupidly defined DT_PPC64_GLINK to be the start
15573 of glink rather than the first entry point, which is
15574 what ld.so needs, and now have a bigger stub to
15575 support automatic multiple TOCs. */
15576 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 8 * 4;
15577 break;
15578
15579 case DT_PPC64_OPD:
15580 s = bfd_get_section_by_name (output_bfd, ".opd");
15581 if (s == NULL)
15582 continue;
15583 dyn.d_un.d_ptr = s->vma;
15584 break;
15585
15586 case DT_PPC64_OPT:
15587 if (htab->do_multi_toc && htab->multi_toc_needed)
15588 dyn.d_un.d_val |= PPC64_OPT_MULTI_TOC;
15589 if (htab->has_plt_localentry0)
15590 dyn.d_un.d_val |= PPC64_OPT_LOCALENTRY;
15591 break;
15592
15593 case DT_PPC64_OPDSZ:
15594 s = bfd_get_section_by_name (output_bfd, ".opd");
15595 if (s == NULL)
15596 continue;
15597 dyn.d_un.d_val = s->size;
15598 break;
15599
15600 case DT_PLTGOT:
15601 s = htab->elf.splt;
15602 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15603 break;
15604
15605 case DT_JMPREL:
15606 s = htab->elf.srelplt;
15607 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15608 break;
15609
15610 case DT_PLTRELSZ:
15611 dyn.d_un.d_val = htab->elf.srelplt->size;
15612 break;
15613
15614 case DT_TEXTREL:
15615 if (htab->local_ifunc_resolver)
15616 info->callbacks->einfo
15617 (_("%X%P: text relocations and GNU indirect "
15618 "functions will result in a segfault at runtime\n"));
15619 else if (htab->maybe_local_ifunc_resolver)
15620 info->callbacks->einfo
15621 (_("%P: warning: text relocations and GNU indirect "
15622 "functions may result in a segfault at runtime\n"));
15623 continue;
15624 }
15625
15626 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
15627 }
15628 }
15629
15630 if (htab->elf.sgot != NULL && htab->elf.sgot->size != 0
15631 && htab->elf.sgot->output_section != bfd_abs_section_ptr)
15632 {
15633 /* Fill in the first entry in the global offset table.
15634 We use it to hold the link-time TOCbase. */
15635 bfd_put_64 (output_bfd,
15636 elf_gp (output_bfd) + TOC_BASE_OFF,
15637 htab->elf.sgot->contents);
15638
15639 /* Set .got entry size. */
15640 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 8;
15641 }
15642
15643 if (htab->elf.splt != NULL && htab->elf.splt->size != 0
15644 && htab->elf.splt->output_section != bfd_abs_section_ptr)
15645 {
15646 /* Set .plt entry size. */
15647 elf_section_data (htab->elf.splt->output_section)->this_hdr.sh_entsize
15648 = PLT_ENTRY_SIZE (htab);
15649 }
15650
15651 /* brlt is SEC_LINKER_CREATED, so we need to write out relocs for
15652 brlt ourselves if emitrelocations. */
15653 if (htab->brlt != NULL
15654 && htab->brlt->reloc_count != 0
15655 && !_bfd_elf_link_output_relocs (output_bfd,
15656 htab->brlt,
15657 elf_section_data (htab->brlt)->rela.hdr,
15658 elf_section_data (htab->brlt)->relocs,
15659 NULL))
15660 return FALSE;
15661
15662 if (htab->glink != NULL
15663 && htab->glink->reloc_count != 0
15664 && !_bfd_elf_link_output_relocs (output_bfd,
15665 htab->glink,
15666 elf_section_data (htab->glink)->rela.hdr,
15667 elf_section_data (htab->glink)->relocs,
15668 NULL))
15669 return FALSE;
15670
15671 if (htab->glink_eh_frame != NULL
15672 && htab->glink_eh_frame->size != 0)
15673 {
15674 bfd_vma val;
15675 bfd_byte *p;
15676 struct map_stub *group;
15677 size_t align = 4;
15678
15679 p = htab->glink_eh_frame->contents;
15680 p += (sizeof (glink_eh_frame_cie) + align - 1) & -align;
15681
15682 for (group = htab->group; group != NULL; group = group->next)
15683 if (group->stub_sec != NULL)
15684 {
15685 /* Offset to stub section. */
15686 val = (group->stub_sec->output_section->vma
15687 + group->stub_sec->output_offset);
15688 val -= (htab->glink_eh_frame->output_section->vma
15689 + htab->glink_eh_frame->output_offset
15690 + (p + 8 - htab->glink_eh_frame->contents));
15691 if (val + 0x80000000 > 0xffffffff)
15692 {
15693 info->callbacks->einfo
15694 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
15695 group->stub_sec->name);
15696 return FALSE;
15697 }
15698 bfd_put_32 (dynobj, val, p + 8);
15699 p += stub_eh_frame_size (group, align);
15700 }
15701 if (htab->glink != NULL && htab->glink->size != 0)
15702 {
15703 /* Offset to .glink. */
15704 val = (htab->glink->output_section->vma
15705 + htab->glink->output_offset
15706 + 8);
15707 val -= (htab->glink_eh_frame->output_section->vma
15708 + htab->glink_eh_frame->output_offset
15709 + (p + 8 - htab->glink_eh_frame->contents));
15710 if (val + 0x80000000 > 0xffffffff)
15711 {
15712 info->callbacks->einfo
15713 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
15714 htab->glink->name);
15715 return FALSE;
15716 }
15717 bfd_put_32 (dynobj, val, p + 8);
15718 p += (24 + align - 1) & -align;
15719 }
15720
15721 if (htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME
15722 && !_bfd_elf_write_section_eh_frame (output_bfd, info,
15723 htab->glink_eh_frame,
15724 htab->glink_eh_frame->contents))
15725 return FALSE;
15726 }
15727
15728 /* We need to handle writing out multiple GOT sections ourselves,
15729 since we didn't add them to DYNOBJ. We know dynobj is the first
15730 bfd. */
15731 while ((dynobj = dynobj->link.next) != NULL)
15732 {
15733 asection *s;
15734
15735 if (!is_ppc64_elf (dynobj))
15736 continue;
15737
15738 s = ppc64_elf_tdata (dynobj)->got;
15739 if (s != NULL
15740 && s->size != 0
15741 && s->output_section != bfd_abs_section_ptr
15742 && !bfd_set_section_contents (output_bfd, s->output_section,
15743 s->contents, s->output_offset,
15744 s->size))
15745 return FALSE;
15746 s = ppc64_elf_tdata (dynobj)->relgot;
15747 if (s != NULL
15748 && s->size != 0
15749 && s->output_section != bfd_abs_section_ptr
15750 && !bfd_set_section_contents (output_bfd, s->output_section,
15751 s->contents, s->output_offset,
15752 s->size))
15753 return FALSE;
15754 }
15755
15756 return TRUE;
15757 }
15758
15759 #include "elf64-target.h"
15760
15761 /* FreeBSD support */
15762
15763 #undef TARGET_LITTLE_SYM
15764 #undef TARGET_LITTLE_NAME
15765
15766 #undef TARGET_BIG_SYM
15767 #define TARGET_BIG_SYM powerpc_elf64_fbsd_vec
15768 #undef TARGET_BIG_NAME
15769 #define TARGET_BIG_NAME "elf64-powerpc-freebsd"
15770
15771 #undef ELF_OSABI
15772 #define ELF_OSABI ELFOSABI_FREEBSD
15773
15774 #undef elf64_bed
15775 #define elf64_bed elf64_powerpc_fbsd_bed
15776
15777 #include "elf64-target.h"
GDB Binutils - Deliverables
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