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__tls_get_addr_opt stub eh_frame info
[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_gc_keep ppc64_elf_gc_keep
105 #define elf_backend_gc_mark_dynamic_ref ppc64_elf_gc_mark_dynamic_ref
106 #define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook
107 #define elf_backend_gc_sweep_hook ppc64_elf_gc_sweep_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 symcount = static_count;
3274 if (!relocatable)
3275 symcount += dyn_count;
3276 if (symcount == 0)
3277 return 0;
3278
3279 syms = bfd_malloc ((symcount + 1) * sizeof (*syms));
3280 if (syms == NULL)
3281 return -1;
3282
3283 if (!relocatable && static_count != 0 && dyn_count != 0)
3284 {
3285 /* Use both symbol tables. */
3286 memcpy (syms, static_syms, static_count * sizeof (*syms));
3287 memcpy (syms + static_count, dyn_syms, (dyn_count + 1) * sizeof (*syms));
3288 }
3289 else if (!relocatable && static_count == 0)
3290 memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms));
3291 else
3292 memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms));
3293
3294 synthetic_relocatable = relocatable;
3295 synthetic_opd = opd;
3296 qsort (syms, symcount, sizeof (*syms), compare_symbols);
3297
3298 if (!relocatable && symcount > 1)
3299 {
3300 long j;
3301 /* Trim duplicate syms, since we may have merged the normal and
3302 dynamic symbols. Actually, we only care about syms that have
3303 different values, so trim any with the same value. */
3304 for (i = 1, j = 1; i < symcount; ++i)
3305 if (syms[i - 1]->value + syms[i - 1]->section->vma
3306 != syms[i]->value + syms[i]->section->vma)
3307 syms[j++] = syms[i];
3308 symcount = j;
3309 }
3310
3311 i = 0;
3312 /* Note that here and in compare_symbols we can't compare opd and
3313 sym->section directly. With separate debug info files, the
3314 symbols will be extracted from the debug file while abfd passed
3315 to this function is the real binary. */
3316 if (opd != NULL && strcmp (syms[i]->section->name, ".opd") == 0)
3317 ++i;
3318 codesecsym = i;
3319
3320 for (; i < symcount; ++i)
3321 if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3322 != (SEC_CODE | SEC_ALLOC))
3323 || (syms[i]->flags & BSF_SECTION_SYM) == 0)
3324 break;
3325 codesecsymend = i;
3326
3327 for (; i < symcount; ++i)
3328 if ((syms[i]->flags & BSF_SECTION_SYM) == 0)
3329 break;
3330 secsymend = i;
3331
3332 if (opd != NULL)
3333 for (; i < symcount; ++i)
3334 if (strcmp (syms[i]->section->name, ".opd") != 0)
3335 break;
3336 opdsymend = i;
3337
3338 for (; i < symcount; ++i)
3339 if ((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3340 != (SEC_CODE | SEC_ALLOC))
3341 break;
3342 symcount = i;
3343
3344 count = 0;
3345
3346 if (relocatable)
3347 {
3348 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3349 arelent *r;
3350 size_t size;
3351 long relcount;
3352
3353 if (opdsymend == secsymend)
3354 goto done;
3355
3356 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3357 relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0;
3358 if (relcount == 0)
3359 goto done;
3360
3361 if (!(*slurp_relocs) (abfd, opd, static_syms, FALSE))
3362 {
3363 count = -1;
3364 goto done;
3365 }
3366
3367 size = 0;
3368 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3369 {
3370 asymbol *sym;
3371
3372 while (r < opd->relocation + relcount
3373 && r->address < syms[i]->value + opd->vma)
3374 ++r;
3375
3376 if (r == opd->relocation + relcount)
3377 break;
3378
3379 if (r->address != syms[i]->value + opd->vma)
3380 continue;
3381
3382 if (r->howto->type != R_PPC64_ADDR64)
3383 continue;
3384
3385 sym = *r->sym_ptr_ptr;
3386 if (!sym_exists_at (syms, opdsymend, symcount,
3387 sym->section->id, sym->value + r->addend))
3388 {
3389 ++count;
3390 size += sizeof (asymbol);
3391 size += strlen (syms[i]->name) + 2;
3392 }
3393 }
3394
3395 if (size == 0)
3396 goto done;
3397 s = *ret = bfd_malloc (size);
3398 if (s == NULL)
3399 {
3400 count = -1;
3401 goto done;
3402 }
3403
3404 names = (char *) (s + count);
3405
3406 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3407 {
3408 asymbol *sym;
3409
3410 while (r < opd->relocation + relcount
3411 && r->address < syms[i]->value + opd->vma)
3412 ++r;
3413
3414 if (r == opd->relocation + relcount)
3415 break;
3416
3417 if (r->address != syms[i]->value + opd->vma)
3418 continue;
3419
3420 if (r->howto->type != R_PPC64_ADDR64)
3421 continue;
3422
3423 sym = *r->sym_ptr_ptr;
3424 if (!sym_exists_at (syms, opdsymend, symcount,
3425 sym->section->id, sym->value + r->addend))
3426 {
3427 size_t len;
3428
3429 *s = *syms[i];
3430 s->flags |= BSF_SYNTHETIC;
3431 s->section = sym->section;
3432 s->value = sym->value + r->addend;
3433 s->name = names;
3434 *names++ = '.';
3435 len = strlen (syms[i]->name);
3436 memcpy (names, syms[i]->name, len + 1);
3437 names += len + 1;
3438 /* Have udata.p point back to the original symbol this
3439 synthetic symbol was derived from. */
3440 s->udata.p = syms[i];
3441 s++;
3442 }
3443 }
3444 }
3445 else
3446 {
3447 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3448 bfd_byte *contents = NULL;
3449 size_t size;
3450 long plt_count = 0;
3451 bfd_vma glink_vma = 0, resolv_vma = 0;
3452 asection *dynamic, *glink = NULL, *relplt = NULL;
3453 arelent *p;
3454
3455 if (opd != NULL && !bfd_malloc_and_get_section (abfd, opd, &contents))
3456 {
3457 free_contents_and_exit_err:
3458 count = -1;
3459 free_contents_and_exit:
3460 if (contents)
3461 free (contents);
3462 goto done;
3463 }
3464
3465 size = 0;
3466 for (i = secsymend; i < opdsymend; ++i)
3467 {
3468 bfd_vma ent;
3469
3470 /* Ignore bogus symbols. */
3471 if (syms[i]->value > opd->size - 8)
3472 continue;
3473
3474 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3475 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3476 {
3477 ++count;
3478 size += sizeof (asymbol);
3479 size += strlen (syms[i]->name) + 2;
3480 }
3481 }
3482
3483 /* Get start of .glink stubs from DT_PPC64_GLINK. */
3484 if (dyn_count != 0
3485 && (dynamic = bfd_get_section_by_name (abfd, ".dynamic")) != NULL)
3486 {
3487 bfd_byte *dynbuf, *extdyn, *extdynend;
3488 size_t extdynsize;
3489 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
3490
3491 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
3492 goto free_contents_and_exit_err;
3493
3494 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
3495 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
3496
3497 extdyn = dynbuf;
3498 extdynend = extdyn + dynamic->size;
3499 for (; extdyn < extdynend; extdyn += extdynsize)
3500 {
3501 Elf_Internal_Dyn dyn;
3502 (*swap_dyn_in) (abfd, extdyn, &dyn);
3503
3504 if (dyn.d_tag == DT_NULL)
3505 break;
3506
3507 if (dyn.d_tag == DT_PPC64_GLINK)
3508 {
3509 /* The first glink stub starts at offset 32; see
3510 comment in ppc64_elf_finish_dynamic_sections. */
3511 glink_vma = dyn.d_un.d_val + GLINK_CALL_STUB_SIZE - 8 * 4;
3512 /* The .glink section usually does not survive the final
3513 link; search for the section (usually .text) where the
3514 glink stubs now reside. */
3515 glink = bfd_sections_find_if (abfd, section_covers_vma,
3516 &glink_vma);
3517 break;
3518 }
3519 }
3520
3521 free (dynbuf);
3522 }
3523
3524 if (glink != NULL)
3525 {
3526 /* Determine __glink trampoline by reading the relative branch
3527 from the first glink stub. */
3528 bfd_byte buf[4];
3529 unsigned int off = 0;
3530
3531 while (bfd_get_section_contents (abfd, glink, buf,
3532 glink_vma + off - glink->vma, 4))
3533 {
3534 unsigned int insn = bfd_get_32 (abfd, buf);
3535 insn ^= B_DOT;
3536 if ((insn & ~0x3fffffc) == 0)
3537 {
3538 resolv_vma = glink_vma + off + (insn ^ 0x2000000) - 0x2000000;
3539 break;
3540 }
3541 off += 4;
3542 if (off > 4)
3543 break;
3544 }
3545
3546 if (resolv_vma)
3547 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
3548
3549 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
3550 if (relplt != NULL)
3551 {
3552 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3553 if (! (*slurp_relocs) (abfd, relplt, dyn_syms, TRUE))
3554 goto free_contents_and_exit_err;
3555
3556 plt_count = relplt->size / sizeof (Elf64_External_Rela);
3557 size += plt_count * sizeof (asymbol);
3558
3559 p = relplt->relocation;
3560 for (i = 0; i < plt_count; i++, p++)
3561 {
3562 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
3563 if (p->addend != 0)
3564 size += sizeof ("+0x") - 1 + 16;
3565 }
3566 }
3567 }
3568
3569 if (size == 0)
3570 goto free_contents_and_exit;
3571 s = *ret = bfd_malloc (size);
3572 if (s == NULL)
3573 goto free_contents_and_exit_err;
3574
3575 names = (char *) (s + count + plt_count + (resolv_vma != 0));
3576
3577 for (i = secsymend; i < opdsymend; ++i)
3578 {
3579 bfd_vma ent;
3580
3581 if (syms[i]->value > opd->size - 8)
3582 continue;
3583
3584 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3585 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3586 {
3587 long lo, hi;
3588 size_t len;
3589 asection *sec = abfd->sections;
3590
3591 *s = *syms[i];
3592 lo = codesecsym;
3593 hi = codesecsymend;
3594 while (lo < hi)
3595 {
3596 long mid = (lo + hi) >> 1;
3597 if (syms[mid]->section->vma < ent)
3598 lo = mid + 1;
3599 else if (syms[mid]->section->vma > ent)
3600 hi = mid;
3601 else
3602 {
3603 sec = syms[mid]->section;
3604 break;
3605 }
3606 }
3607
3608 if (lo >= hi && lo > codesecsym)
3609 sec = syms[lo - 1]->section;
3610
3611 for (; sec != NULL; sec = sec->next)
3612 {
3613 if (sec->vma > ent)
3614 break;
3615 /* SEC_LOAD may not be set if SEC is from a separate debug
3616 info file. */
3617 if ((sec->flags & SEC_ALLOC) == 0)
3618 break;
3619 if ((sec->flags & SEC_CODE) != 0)
3620 s->section = sec;
3621 }
3622 s->flags |= BSF_SYNTHETIC;
3623 s->value = ent - s->section->vma;
3624 s->name = names;
3625 *names++ = '.';
3626 len = strlen (syms[i]->name);
3627 memcpy (names, syms[i]->name, len + 1);
3628 names += len + 1;
3629 /* Have udata.p point back to the original symbol this
3630 synthetic symbol was derived from. */
3631 s->udata.p = syms[i];
3632 s++;
3633 }
3634 }
3635 free (contents);
3636
3637 if (glink != NULL && relplt != NULL)
3638 {
3639 if (resolv_vma)
3640 {
3641 /* Add a symbol for the main glink trampoline. */
3642 memset (s, 0, sizeof *s);
3643 s->the_bfd = abfd;
3644 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3645 s->section = glink;
3646 s->value = resolv_vma - glink->vma;
3647 s->name = names;
3648 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3649 names += sizeof ("__glink_PLTresolve");
3650 s++;
3651 count++;
3652 }
3653
3654 /* FIXME: It would be very much nicer to put sym@plt on the
3655 stub rather than on the glink branch table entry. The
3656 objdump disassembler would then use a sensible symbol
3657 name on plt calls. The difficulty in doing so is
3658 a) finding the stubs, and,
3659 b) matching stubs against plt entries, and,
3660 c) there can be multiple stubs for a given plt entry.
3661
3662 Solving (a) could be done by code scanning, but older
3663 ppc64 binaries used different stubs to current code.
3664 (b) is the tricky one since you need to known the toc
3665 pointer for at least one function that uses a pic stub to
3666 be able to calculate the plt address referenced.
3667 (c) means gdb would need to set multiple breakpoints (or
3668 find the glink branch itself) when setting breakpoints
3669 for pending shared library loads. */
3670 p = relplt->relocation;
3671 for (i = 0; i < plt_count; i++, p++)
3672 {
3673 size_t len;
3674
3675 *s = **p->sym_ptr_ptr;
3676 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
3677 we are defining a symbol, ensure one of them is set. */
3678 if ((s->flags & BSF_LOCAL) == 0)
3679 s->flags |= BSF_GLOBAL;
3680 s->flags |= BSF_SYNTHETIC;
3681 s->section = glink;
3682 s->value = glink_vma - glink->vma;
3683 s->name = names;
3684 s->udata.p = NULL;
3685 len = strlen ((*p->sym_ptr_ptr)->name);
3686 memcpy (names, (*p->sym_ptr_ptr)->name, len);
3687 names += len;
3688 if (p->addend != 0)
3689 {
3690 memcpy (names, "+0x", sizeof ("+0x") - 1);
3691 names += sizeof ("+0x") - 1;
3692 bfd_sprintf_vma (abfd, names, p->addend);
3693 names += strlen (names);
3694 }
3695 memcpy (names, "@plt", sizeof ("@plt"));
3696 names += sizeof ("@plt");
3697 s++;
3698 if (abi < 2)
3699 {
3700 glink_vma += 8;
3701 if (i >= 0x8000)
3702 glink_vma += 4;
3703 }
3704 else
3705 glink_vma += 4;
3706 }
3707 count += plt_count;
3708 }
3709 }
3710
3711 done:
3712 free (syms);
3713 return count;
3714 }
3715 \f
3716 /* The following functions are specific to the ELF linker, while
3717 functions above are used generally. Those named ppc64_elf_* are
3718 called by the main ELF linker code. They appear in this file more
3719 or less in the order in which they are called. eg.
3720 ppc64_elf_check_relocs is called early in the link process,
3721 ppc64_elf_finish_dynamic_sections is one of the last functions
3722 called.
3723
3724 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
3725 functions have both a function code symbol and a function descriptor
3726 symbol. A call to foo in a relocatable object file looks like:
3727
3728 . .text
3729 . x:
3730 . bl .foo
3731 . nop
3732
3733 The function definition in another object file might be:
3734
3735 . .section .opd
3736 . foo: .quad .foo
3737 . .quad .TOC.@tocbase
3738 . .quad 0
3739 .
3740 . .text
3741 . .foo: blr
3742
3743 When the linker resolves the call during a static link, the branch
3744 unsurprisingly just goes to .foo and the .opd information is unused.
3745 If the function definition is in a shared library, things are a little
3746 different: The call goes via a plt call stub, the opd information gets
3747 copied to the plt, and the linker patches the nop.
3748
3749 . x:
3750 . bl .foo_stub
3751 . ld 2,40(1)
3752 .
3753 .
3754 . .foo_stub:
3755 . std 2,40(1) # in practice, the call stub
3756 . addis 11,2,Lfoo@toc@ha # is slightly optimized, but
3757 . addi 11,11,Lfoo@toc@l # this is the general idea
3758 . ld 12,0(11)
3759 . ld 2,8(11)
3760 . mtctr 12
3761 . ld 11,16(11)
3762 . bctr
3763 .
3764 . .section .plt
3765 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
3766
3767 The "reloc ()" notation is supposed to indicate that the linker emits
3768 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
3769 copying.
3770
3771 What are the difficulties here? Well, firstly, the relocations
3772 examined by the linker in check_relocs are against the function code
3773 sym .foo, while the dynamic relocation in the plt is emitted against
3774 the function descriptor symbol, foo. Somewhere along the line, we need
3775 to carefully copy dynamic link information from one symbol to the other.
3776 Secondly, the generic part of the elf linker will make .foo a dynamic
3777 symbol as is normal for most other backends. We need foo dynamic
3778 instead, at least for an application final link. However, when
3779 creating a shared library containing foo, we need to have both symbols
3780 dynamic so that references to .foo are satisfied during the early
3781 stages of linking. Otherwise the linker might decide to pull in a
3782 definition from some other object, eg. a static library.
3783
3784 Update: As of August 2004, we support a new convention. Function
3785 calls may use the function descriptor symbol, ie. "bl foo". This
3786 behaves exactly as "bl .foo". */
3787
3788 /* Of those relocs that might be copied as dynamic relocs, this function
3789 selects those that must be copied when linking a shared library,
3790 even when the symbol is local. */
3791
3792 static int
3793 must_be_dyn_reloc (struct bfd_link_info *info,
3794 enum elf_ppc64_reloc_type r_type)
3795 {
3796 switch (r_type)
3797 {
3798 default:
3799 return 1;
3800
3801 case R_PPC64_REL32:
3802 case R_PPC64_REL64:
3803 case R_PPC64_REL30:
3804 return 0;
3805
3806 case R_PPC64_TPREL16:
3807 case R_PPC64_TPREL16_LO:
3808 case R_PPC64_TPREL16_HI:
3809 case R_PPC64_TPREL16_HA:
3810 case R_PPC64_TPREL16_DS:
3811 case R_PPC64_TPREL16_LO_DS:
3812 case R_PPC64_TPREL16_HIGH:
3813 case R_PPC64_TPREL16_HIGHA:
3814 case R_PPC64_TPREL16_HIGHER:
3815 case R_PPC64_TPREL16_HIGHERA:
3816 case R_PPC64_TPREL16_HIGHEST:
3817 case R_PPC64_TPREL16_HIGHESTA:
3818 case R_PPC64_TPREL64:
3819 return !bfd_link_executable (info);
3820 }
3821 }
3822
3823 /* Whether an undefined weak symbol should resolve to its link-time
3824 value, even in PIC or PIE objects. */
3825 #define UNDEFWEAK_NO_DYNAMIC_RELOC(INFO, H) \
3826 ((H)->root.type == bfd_link_hash_undefweak \
3827 && (ELF_ST_VISIBILITY ((H)->other) != STV_DEFAULT \
3828 || (INFO)->dynamic_undefined_weak == 0))
3829
3830 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3831 copying dynamic variables from a shared lib into an app's dynbss
3832 section, and instead use a dynamic relocation to point into the
3833 shared lib. With code that gcc generates, it's vital that this be
3834 enabled; In the PowerPC64 ABI, the address of a function is actually
3835 the address of a function descriptor, which resides in the .opd
3836 section. gcc uses the descriptor directly rather than going via the
3837 GOT as some other ABI's do, which means that initialized function
3838 pointers must reference the descriptor. Thus, a function pointer
3839 initialized to the address of a function in a shared library will
3840 either require a copy reloc, or a dynamic reloc. Using a copy reloc
3841 redefines the function descriptor symbol to point to the copy. This
3842 presents a problem as a plt entry for that function is also
3843 initialized from the function descriptor symbol and the copy reloc
3844 may not be initialized first. */
3845 #define ELIMINATE_COPY_RELOCS 1
3846
3847 /* Section name for stubs is the associated section name plus this
3848 string. */
3849 #define STUB_SUFFIX ".stub"
3850
3851 /* Linker stubs.
3852 ppc_stub_long_branch:
3853 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
3854 destination, but a 24 bit branch in a stub section will reach.
3855 . b dest
3856
3857 ppc_stub_plt_branch:
3858 Similar to the above, but a 24 bit branch in the stub section won't
3859 reach its destination.
3860 . addis %r11,%r2,xxx@toc@ha
3861 . ld %r12,xxx@toc@l(%r11)
3862 . mtctr %r12
3863 . bctr
3864
3865 ppc_stub_plt_call:
3866 Used to call a function in a shared library. If it so happens that
3867 the plt entry referenced crosses a 64k boundary, then an extra
3868 "addi %r11,%r11,xxx@toc@l" will be inserted before the "mtctr".
3869 . std %r2,40(%r1)
3870 . addis %r11,%r2,xxx@toc@ha
3871 . ld %r12,xxx+0@toc@l(%r11)
3872 . mtctr %r12
3873 . ld %r2,xxx+8@toc@l(%r11)
3874 . ld %r11,xxx+16@toc@l(%r11)
3875 . bctr
3876
3877 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
3878 code to adjust the value and save r2 to support multiple toc sections.
3879 A ppc_stub_long_branch with an r2 offset looks like:
3880 . std %r2,40(%r1)
3881 . addis %r2,%r2,off@ha
3882 . addi %r2,%r2,off@l
3883 . b dest
3884
3885 A ppc_stub_plt_branch with an r2 offset looks like:
3886 . std %r2,40(%r1)
3887 . addis %r11,%r2,xxx@toc@ha
3888 . ld %r12,xxx@toc@l(%r11)
3889 . addis %r2,%r2,off@ha
3890 . addi %r2,%r2,off@l
3891 . mtctr %r12
3892 . bctr
3893
3894 In cases where the "addis" instruction would add zero, the "addis" is
3895 omitted and following instructions modified slightly in some cases.
3896 */
3897
3898 enum ppc_stub_type {
3899 ppc_stub_none,
3900 ppc_stub_long_branch,
3901 ppc_stub_long_branch_r2off,
3902 ppc_stub_plt_branch,
3903 ppc_stub_plt_branch_r2off,
3904 ppc_stub_plt_call,
3905 ppc_stub_plt_call_r2save,
3906 ppc_stub_global_entry,
3907 ppc_stub_save_res
3908 };
3909
3910 /* Information on stub grouping. */
3911 struct map_stub
3912 {
3913 /* The stub section. */
3914 asection *stub_sec;
3915 /* This is the section to which stubs in the group will be attached. */
3916 asection *link_sec;
3917 /* Next group. */
3918 struct map_stub *next;
3919 /* Whether to emit a copy of register save/restore functions in this
3920 group. */
3921 int needs_save_res;
3922 /* The offset of the __tls_get_addr_opt plt stub bctrl in this group,
3923 or -1u if no such stub with bctrl exists. */
3924 unsigned int tls_get_addr_opt_bctrl;
3925 };
3926
3927 struct ppc_stub_hash_entry {
3928
3929 /* Base hash table entry structure. */
3930 struct bfd_hash_entry root;
3931
3932 enum ppc_stub_type stub_type;
3933
3934 /* Group information. */
3935 struct map_stub *group;
3936
3937 /* Offset within stub_sec of the beginning of this stub. */
3938 bfd_vma stub_offset;
3939
3940 /* Given the symbol's value and its section we can determine its final
3941 value when building the stubs (so the stub knows where to jump. */
3942 bfd_vma target_value;
3943 asection *target_section;
3944
3945 /* The symbol table entry, if any, that this was derived from. */
3946 struct ppc_link_hash_entry *h;
3947 struct plt_entry *plt_ent;
3948
3949 /* Symbol st_other. */
3950 unsigned char other;
3951 };
3952
3953 struct ppc_branch_hash_entry {
3954
3955 /* Base hash table entry structure. */
3956 struct bfd_hash_entry root;
3957
3958 /* Offset within branch lookup table. */
3959 unsigned int offset;
3960
3961 /* Generation marker. */
3962 unsigned int iter;
3963 };
3964
3965 /* Used to track dynamic relocations for local symbols. */
3966 struct ppc_dyn_relocs
3967 {
3968 struct ppc_dyn_relocs *next;
3969
3970 /* The input section of the reloc. */
3971 asection *sec;
3972
3973 /* Total number of relocs copied for the input section. */
3974 unsigned int count : 31;
3975
3976 /* Whether this entry is for STT_GNU_IFUNC symbols. */
3977 unsigned int ifunc : 1;
3978 };
3979
3980 struct ppc_link_hash_entry
3981 {
3982 struct elf_link_hash_entry elf;
3983
3984 union {
3985 /* A pointer to the most recently used stub hash entry against this
3986 symbol. */
3987 struct ppc_stub_hash_entry *stub_cache;
3988
3989 /* A pointer to the next symbol starting with a '.' */
3990 struct ppc_link_hash_entry *next_dot_sym;
3991 } u;
3992
3993 /* Track dynamic relocs copied for this symbol. */
3994 struct elf_dyn_relocs *dyn_relocs;
3995
3996 /* Chain of aliases referring to a weakdef. */
3997 struct ppc_link_hash_entry *weakref;
3998
3999 /* Link between function code and descriptor symbols. */
4000 struct ppc_link_hash_entry *oh;
4001
4002 /* Flag function code and descriptor symbols. */
4003 unsigned int is_func:1;
4004 unsigned int is_func_descriptor:1;
4005 unsigned int fake:1;
4006
4007 /* Whether global opd/toc sym has been adjusted or not.
4008 After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
4009 should be set for all globals defined in any opd/toc section. */
4010 unsigned int adjust_done:1;
4011
4012 /* Set if this is an out-of-line register save/restore function,
4013 with non-standard calling convention. */
4014 unsigned int save_res:1;
4015
4016 /* Contexts in which symbol is used in the GOT (or TOC).
4017 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
4018 corresponding relocs are encountered during check_relocs.
4019 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
4020 indicate the corresponding GOT entry type is not needed.
4021 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
4022 a TPREL one. We use a separate flag rather than setting TPREL
4023 just for convenience in distinguishing the two cases. */
4024 #define TLS_GD 1 /* GD reloc. */
4025 #define TLS_LD 2 /* LD reloc. */
4026 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
4027 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
4028 #define TLS_TLS 16 /* Any TLS reloc. */
4029 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
4030 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
4031 #define PLT_IFUNC 128 /* STT_GNU_IFUNC. */
4032 unsigned char tls_mask;
4033 };
4034
4035 /* ppc64 ELF linker hash table. */
4036
4037 struct ppc_link_hash_table
4038 {
4039 struct elf_link_hash_table elf;
4040
4041 /* The stub hash table. */
4042 struct bfd_hash_table stub_hash_table;
4043
4044 /* Another hash table for plt_branch stubs. */
4045 struct bfd_hash_table branch_hash_table;
4046
4047 /* Hash table for function prologue tocsave. */
4048 htab_t tocsave_htab;
4049
4050 /* Various options and other info passed from the linker. */
4051 struct ppc64_elf_params *params;
4052
4053 /* The size of sec_info below. */
4054 unsigned int sec_info_arr_size;
4055
4056 /* Per-section array of extra section info. Done this way rather
4057 than as part of ppc64_elf_section_data so we have the info for
4058 non-ppc64 sections. */
4059 struct
4060 {
4061 /* Along with elf_gp, specifies the TOC pointer used by this section. */
4062 bfd_vma toc_off;
4063
4064 union
4065 {
4066 /* The section group that this section belongs to. */
4067 struct map_stub *group;
4068 /* A temp section list pointer. */
4069 asection *list;
4070 } u;
4071 } *sec_info;
4072
4073 /* Linked list of groups. */
4074 struct map_stub *group;
4075
4076 /* Temp used when calculating TOC pointers. */
4077 bfd_vma toc_curr;
4078 bfd *toc_bfd;
4079 asection *toc_first_sec;
4080
4081 /* Used when adding symbols. */
4082 struct ppc_link_hash_entry *dot_syms;
4083
4084 /* Shortcuts to get to dynamic linker sections. */
4085 asection *glink;
4086 asection *sfpr;
4087 asection *brlt;
4088 asection *relbrlt;
4089 asection *glink_eh_frame;
4090
4091 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
4092 struct ppc_link_hash_entry *tls_get_addr;
4093 struct ppc_link_hash_entry *tls_get_addr_fd;
4094
4095 /* The size of reliplt used by got entry relocs. */
4096 bfd_size_type got_reli_size;
4097
4098 /* Statistics. */
4099 unsigned long stub_count[ppc_stub_global_entry];
4100
4101 /* Number of stubs against global syms. */
4102 unsigned long stub_globals;
4103
4104 /* Set if we're linking code with function descriptors. */
4105 unsigned int opd_abi:1;
4106
4107 /* Support for multiple toc sections. */
4108 unsigned int do_multi_toc:1;
4109 unsigned int multi_toc_needed:1;
4110 unsigned int second_toc_pass:1;
4111 unsigned int do_toc_opt:1;
4112
4113 /* Set on error. */
4114 unsigned int stub_error:1;
4115
4116 /* Whether func_desc_adjust needs to be run over symbols. */
4117 unsigned int need_func_desc_adj:1;
4118
4119 /* Whether there exist local gnu indirect function resolvers,
4120 referenced by dynamic relocations. */
4121 unsigned int local_ifunc_resolver:1;
4122 unsigned int maybe_local_ifunc_resolver:1;
4123
4124 /* Whether plt calls for ELFv2 localentry:0 funcs have been optimized. */
4125 unsigned int has_plt_localentry0:1;
4126
4127 /* Incremented every time we size stubs. */
4128 unsigned int stub_iteration;
4129
4130 /* Small local sym cache. */
4131 struct sym_cache sym_cache;
4132 };
4133
4134 /* Rename some of the generic section flags to better document how they
4135 are used here. */
4136
4137 /* Nonzero if this section has TLS related relocations. */
4138 #define has_tls_reloc sec_flg0
4139
4140 /* Nonzero if this section has a call to __tls_get_addr. */
4141 #define has_tls_get_addr_call sec_flg1
4142
4143 /* Nonzero if this section has any toc or got relocs. */
4144 #define has_toc_reloc sec_flg2
4145
4146 /* Nonzero if this section has a call to another section that uses
4147 the toc or got. */
4148 #define makes_toc_func_call sec_flg3
4149
4150 /* Recursion protection when determining above flag. */
4151 #define call_check_in_progress sec_flg4
4152 #define call_check_done sec_flg5
4153
4154 /* Get the ppc64 ELF linker hash table from a link_info structure. */
4155
4156 #define ppc_hash_table(p) \
4157 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
4158 == PPC64_ELF_DATA ? ((struct ppc_link_hash_table *) ((p)->hash)) : NULL)
4159
4160 #define ppc_stub_hash_lookup(table, string, create, copy) \
4161 ((struct ppc_stub_hash_entry *) \
4162 bfd_hash_lookup ((table), (string), (create), (copy)))
4163
4164 #define ppc_branch_hash_lookup(table, string, create, copy) \
4165 ((struct ppc_branch_hash_entry *) \
4166 bfd_hash_lookup ((table), (string), (create), (copy)))
4167
4168 /* Create an entry in the stub hash table. */
4169
4170 static struct bfd_hash_entry *
4171 stub_hash_newfunc (struct bfd_hash_entry *entry,
4172 struct bfd_hash_table *table,
4173 const char *string)
4174 {
4175 /* Allocate the structure if it has not already been allocated by a
4176 subclass. */
4177 if (entry == NULL)
4178 {
4179 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
4180 if (entry == NULL)
4181 return entry;
4182 }
4183
4184 /* Call the allocation method of the superclass. */
4185 entry = bfd_hash_newfunc (entry, table, string);
4186 if (entry != NULL)
4187 {
4188 struct ppc_stub_hash_entry *eh;
4189
4190 /* Initialize the local fields. */
4191 eh = (struct ppc_stub_hash_entry *) entry;
4192 eh->stub_type = ppc_stub_none;
4193 eh->group = NULL;
4194 eh->stub_offset = 0;
4195 eh->target_value = 0;
4196 eh->target_section = NULL;
4197 eh->h = NULL;
4198 eh->plt_ent = NULL;
4199 eh->other = 0;
4200 }
4201
4202 return entry;
4203 }
4204
4205 /* Create an entry in the branch hash table. */
4206
4207 static struct bfd_hash_entry *
4208 branch_hash_newfunc (struct bfd_hash_entry *entry,
4209 struct bfd_hash_table *table,
4210 const char *string)
4211 {
4212 /* Allocate the structure if it has not already been allocated by a
4213 subclass. */
4214 if (entry == NULL)
4215 {
4216 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
4217 if (entry == NULL)
4218 return entry;
4219 }
4220
4221 /* Call the allocation method of the superclass. */
4222 entry = bfd_hash_newfunc (entry, table, string);
4223 if (entry != NULL)
4224 {
4225 struct ppc_branch_hash_entry *eh;
4226
4227 /* Initialize the local fields. */
4228 eh = (struct ppc_branch_hash_entry *) entry;
4229 eh->offset = 0;
4230 eh->iter = 0;
4231 }
4232
4233 return entry;
4234 }
4235
4236 /* Create an entry in a ppc64 ELF linker hash table. */
4237
4238 static struct bfd_hash_entry *
4239 link_hash_newfunc (struct bfd_hash_entry *entry,
4240 struct bfd_hash_table *table,
4241 const char *string)
4242 {
4243 /* Allocate the structure if it has not already been allocated by a
4244 subclass. */
4245 if (entry == NULL)
4246 {
4247 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
4248 if (entry == NULL)
4249 return entry;
4250 }
4251
4252 /* Call the allocation method of the superclass. */
4253 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
4254 if (entry != NULL)
4255 {
4256 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
4257
4258 memset (&eh->u.stub_cache, 0,
4259 (sizeof (struct ppc_link_hash_entry)
4260 - offsetof (struct ppc_link_hash_entry, u.stub_cache)));
4261
4262 /* When making function calls, old ABI code references function entry
4263 points (dot symbols), while new ABI code references the function
4264 descriptor symbol. We need to make any combination of reference and
4265 definition work together, without breaking archive linking.
4266
4267 For a defined function "foo" and an undefined call to "bar":
4268 An old object defines "foo" and ".foo", references ".bar" (possibly
4269 "bar" too).
4270 A new object defines "foo" and references "bar".
4271
4272 A new object thus has no problem with its undefined symbols being
4273 satisfied by definitions in an old object. On the other hand, the
4274 old object won't have ".bar" satisfied by a new object.
4275
4276 Keep a list of newly added dot-symbols. */
4277
4278 if (string[0] == '.')
4279 {
4280 struct ppc_link_hash_table *htab;
4281
4282 htab = (struct ppc_link_hash_table *) table;
4283 eh->u.next_dot_sym = htab->dot_syms;
4284 htab->dot_syms = eh;
4285 }
4286 }
4287
4288 return entry;
4289 }
4290
4291 struct tocsave_entry {
4292 asection *sec;
4293 bfd_vma offset;
4294 };
4295
4296 static hashval_t
4297 tocsave_htab_hash (const void *p)
4298 {
4299 const struct tocsave_entry *e = (const struct tocsave_entry *) p;
4300 return ((bfd_vma) (intptr_t) e->sec ^ e->offset) >> 3;
4301 }
4302
4303 static int
4304 tocsave_htab_eq (const void *p1, const void *p2)
4305 {
4306 const struct tocsave_entry *e1 = (const struct tocsave_entry *) p1;
4307 const struct tocsave_entry *e2 = (const struct tocsave_entry *) p2;
4308 return e1->sec == e2->sec && e1->offset == e2->offset;
4309 }
4310
4311 /* Destroy a ppc64 ELF linker hash table. */
4312
4313 static void
4314 ppc64_elf_link_hash_table_free (bfd *obfd)
4315 {
4316 struct ppc_link_hash_table *htab;
4317
4318 htab = (struct ppc_link_hash_table *) obfd->link.hash;
4319 if (htab->tocsave_htab)
4320 htab_delete (htab->tocsave_htab);
4321 bfd_hash_table_free (&htab->branch_hash_table);
4322 bfd_hash_table_free (&htab->stub_hash_table);
4323 _bfd_elf_link_hash_table_free (obfd);
4324 }
4325
4326 /* Create a ppc64 ELF linker hash table. */
4327
4328 static struct bfd_link_hash_table *
4329 ppc64_elf_link_hash_table_create (bfd *abfd)
4330 {
4331 struct ppc_link_hash_table *htab;
4332 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
4333
4334 htab = bfd_zmalloc (amt);
4335 if (htab == NULL)
4336 return NULL;
4337
4338 if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc,
4339 sizeof (struct ppc_link_hash_entry),
4340 PPC64_ELF_DATA))
4341 {
4342 free (htab);
4343 return NULL;
4344 }
4345
4346 /* Init the stub hash table too. */
4347 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc,
4348 sizeof (struct ppc_stub_hash_entry)))
4349 {
4350 _bfd_elf_link_hash_table_free (abfd);
4351 return NULL;
4352 }
4353
4354 /* And the branch hash table. */
4355 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc,
4356 sizeof (struct ppc_branch_hash_entry)))
4357 {
4358 bfd_hash_table_free (&htab->stub_hash_table);
4359 _bfd_elf_link_hash_table_free (abfd);
4360 return NULL;
4361 }
4362
4363 htab->tocsave_htab = htab_try_create (1024,
4364 tocsave_htab_hash,
4365 tocsave_htab_eq,
4366 NULL);
4367 if (htab->tocsave_htab == NULL)
4368 {
4369 ppc64_elf_link_hash_table_free (abfd);
4370 return NULL;
4371 }
4372 htab->elf.root.hash_table_free = ppc64_elf_link_hash_table_free;
4373
4374 /* Initializing two fields of the union is just cosmetic. We really
4375 only care about glist, but when compiled on a 32-bit host the
4376 bfd_vma fields are larger. Setting the bfd_vma to zero makes
4377 debugger inspection of these fields look nicer. */
4378 htab->elf.init_got_refcount.refcount = 0;
4379 htab->elf.init_got_refcount.glist = NULL;
4380 htab->elf.init_plt_refcount.refcount = 0;
4381 htab->elf.init_plt_refcount.glist = NULL;
4382 htab->elf.init_got_offset.offset = 0;
4383 htab->elf.init_got_offset.glist = NULL;
4384 htab->elf.init_plt_offset.offset = 0;
4385 htab->elf.init_plt_offset.glist = NULL;
4386
4387 return &htab->elf.root;
4388 }
4389
4390 /* Create sections for linker generated code. */
4391
4392 static bfd_boolean
4393 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
4394 {
4395 struct ppc_link_hash_table *htab;
4396 flagword flags;
4397
4398 htab = ppc_hash_table (info);
4399
4400 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
4401 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4402 if (htab->params->save_restore_funcs)
4403 {
4404 /* Create .sfpr for code to save and restore fp regs. */
4405 htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr",
4406 flags);
4407 if (htab->sfpr == NULL
4408 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
4409 return FALSE;
4410 }
4411
4412 if (bfd_link_relocatable (info))
4413 return TRUE;
4414
4415 /* Create .glink for lazy dynamic linking support. */
4416 htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink",
4417 flags);
4418 if (htab->glink == NULL
4419 || ! bfd_set_section_alignment (dynobj, htab->glink, 3))
4420 return FALSE;
4421
4422 if (!info->no_ld_generated_unwind_info)
4423 {
4424 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
4425 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4426 htab->glink_eh_frame = bfd_make_section_anyway_with_flags (dynobj,
4427 ".eh_frame",
4428 flags);
4429 if (htab->glink_eh_frame == NULL
4430 || !bfd_set_section_alignment (dynobj, htab->glink_eh_frame, 2))
4431 return FALSE;
4432 }
4433
4434 flags = SEC_ALLOC | SEC_LINKER_CREATED;
4435 htab->elf.iplt = bfd_make_section_anyway_with_flags (dynobj, ".iplt", flags);
4436 if (htab->elf.iplt == NULL
4437 || ! bfd_set_section_alignment (dynobj, htab->elf.iplt, 3))
4438 return FALSE;
4439
4440 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4441 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4442 htab->elf.irelplt
4443 = bfd_make_section_anyway_with_flags (dynobj, ".rela.iplt", flags);
4444 if (htab->elf.irelplt == NULL
4445 || ! bfd_set_section_alignment (dynobj, htab->elf.irelplt, 3))
4446 return FALSE;
4447
4448 /* Create branch lookup table for plt_branch stubs. */
4449 flags = (SEC_ALLOC | SEC_LOAD
4450 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4451 htab->brlt = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt",
4452 flags);
4453 if (htab->brlt == NULL
4454 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
4455 return FALSE;
4456
4457 if (!bfd_link_pic (info))
4458 return TRUE;
4459
4460 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4461 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4462 htab->relbrlt = bfd_make_section_anyway_with_flags (dynobj,
4463 ".rela.branch_lt",
4464 flags);
4465 if (htab->relbrlt == NULL
4466 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
4467 return FALSE;
4468
4469 return TRUE;
4470 }
4471
4472 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
4473
4474 bfd_boolean
4475 ppc64_elf_init_stub_bfd (struct bfd_link_info *info,
4476 struct ppc64_elf_params *params)
4477 {
4478 struct ppc_link_hash_table *htab;
4479
4480 elf_elfheader (params->stub_bfd)->e_ident[EI_CLASS] = ELFCLASS64;
4481
4482 /* Always hook our dynamic sections into the first bfd, which is the
4483 linker created stub bfd. This ensures that the GOT header is at
4484 the start of the output TOC section. */
4485 htab = ppc_hash_table (info);
4486 htab->elf.dynobj = params->stub_bfd;
4487 htab->params = params;
4488
4489 return create_linkage_sections (htab->elf.dynobj, info);
4490 }
4491
4492 /* Build a name for an entry in the stub hash table. */
4493
4494 static char *
4495 ppc_stub_name (const asection *input_section,
4496 const asection *sym_sec,
4497 const struct ppc_link_hash_entry *h,
4498 const Elf_Internal_Rela *rel)
4499 {
4500 char *stub_name;
4501 ssize_t len;
4502
4503 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
4504 offsets from a sym as a branch target? In fact, we could
4505 probably assume the addend is always zero. */
4506 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
4507
4508 if (h)
4509 {
4510 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
4511 stub_name = bfd_malloc (len);
4512 if (stub_name == NULL)
4513 return stub_name;
4514
4515 len = sprintf (stub_name, "%08x.%s+%x",
4516 input_section->id & 0xffffffff,
4517 h->elf.root.root.string,
4518 (int) rel->r_addend & 0xffffffff);
4519 }
4520 else
4521 {
4522 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
4523 stub_name = bfd_malloc (len);
4524 if (stub_name == NULL)
4525 return stub_name;
4526
4527 len = sprintf (stub_name, "%08x.%x:%x+%x",
4528 input_section->id & 0xffffffff,
4529 sym_sec->id & 0xffffffff,
4530 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
4531 (int) rel->r_addend & 0xffffffff);
4532 }
4533 if (len > 2 && stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
4534 stub_name[len - 2] = 0;
4535 return stub_name;
4536 }
4537
4538 /* Look up an entry in the stub hash. Stub entries are cached because
4539 creating the stub name takes a bit of time. */
4540
4541 static struct ppc_stub_hash_entry *
4542 ppc_get_stub_entry (const asection *input_section,
4543 const asection *sym_sec,
4544 struct ppc_link_hash_entry *h,
4545 const Elf_Internal_Rela *rel,
4546 struct ppc_link_hash_table *htab)
4547 {
4548 struct ppc_stub_hash_entry *stub_entry;
4549 struct map_stub *group;
4550
4551 /* If this input section is part of a group of sections sharing one
4552 stub section, then use the id of the first section in the group.
4553 Stub names need to include a section id, as there may well be
4554 more than one stub used to reach say, printf, and we need to
4555 distinguish between them. */
4556 group = htab->sec_info[input_section->id].u.group;
4557 if (group == NULL)
4558 return NULL;
4559
4560 if (h != NULL && h->u.stub_cache != NULL
4561 && h->u.stub_cache->h == h
4562 && h->u.stub_cache->group == group)
4563 {
4564 stub_entry = h->u.stub_cache;
4565 }
4566 else
4567 {
4568 char *stub_name;
4569
4570 stub_name = ppc_stub_name (group->link_sec, sym_sec, h, rel);
4571 if (stub_name == NULL)
4572 return NULL;
4573
4574 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
4575 stub_name, FALSE, FALSE);
4576 if (h != NULL)
4577 h->u.stub_cache = stub_entry;
4578
4579 free (stub_name);
4580 }
4581
4582 return stub_entry;
4583 }
4584
4585 /* Add a new stub entry to the stub hash. Not all fields of the new
4586 stub entry are initialised. */
4587
4588 static struct ppc_stub_hash_entry *
4589 ppc_add_stub (const char *stub_name,
4590 asection *section,
4591 struct bfd_link_info *info)
4592 {
4593 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4594 struct map_stub *group;
4595 asection *link_sec;
4596 asection *stub_sec;
4597 struct ppc_stub_hash_entry *stub_entry;
4598
4599 group = htab->sec_info[section->id].u.group;
4600 link_sec = group->link_sec;
4601 stub_sec = group->stub_sec;
4602 if (stub_sec == NULL)
4603 {
4604 size_t namelen;
4605 bfd_size_type len;
4606 char *s_name;
4607
4608 namelen = strlen (link_sec->name);
4609 len = namelen + sizeof (STUB_SUFFIX);
4610 s_name = bfd_alloc (htab->params->stub_bfd, len);
4611 if (s_name == NULL)
4612 return NULL;
4613
4614 memcpy (s_name, link_sec->name, namelen);
4615 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
4616 stub_sec = (*htab->params->add_stub_section) (s_name, link_sec);
4617 if (stub_sec == NULL)
4618 return NULL;
4619 group->stub_sec = stub_sec;
4620 }
4621
4622 /* Enter this entry into the linker stub hash table. */
4623 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
4624 TRUE, FALSE);
4625 if (stub_entry == NULL)
4626 {
4627 /* xgettext:c-format */
4628 info->callbacks->einfo (_("%P: %B: cannot create stub entry %s\n"),
4629 section->owner, stub_name);
4630 return NULL;
4631 }
4632
4633 stub_entry->group = group;
4634 stub_entry->stub_offset = 0;
4635 return stub_entry;
4636 }
4637
4638 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
4639 not already done. */
4640
4641 static bfd_boolean
4642 create_got_section (bfd *abfd, struct bfd_link_info *info)
4643 {
4644 asection *got, *relgot;
4645 flagword flags;
4646 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4647
4648 if (!is_ppc64_elf (abfd))
4649 return FALSE;
4650 if (htab == NULL)
4651 return FALSE;
4652
4653 if (!htab->elf.sgot
4654 && !_bfd_elf_create_got_section (htab->elf.dynobj, info))
4655 return FALSE;
4656
4657 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
4658 | SEC_LINKER_CREATED);
4659
4660 got = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
4661 if (!got
4662 || !bfd_set_section_alignment (abfd, got, 3))
4663 return FALSE;
4664
4665 relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got",
4666 flags | SEC_READONLY);
4667 if (!relgot
4668 || ! bfd_set_section_alignment (abfd, relgot, 3))
4669 return FALSE;
4670
4671 ppc64_elf_tdata (abfd)->got = got;
4672 ppc64_elf_tdata (abfd)->relgot = relgot;
4673 return TRUE;
4674 }
4675
4676 /* Follow indirect and warning symbol links. */
4677
4678 static inline struct bfd_link_hash_entry *
4679 follow_link (struct bfd_link_hash_entry *h)
4680 {
4681 while (h->type == bfd_link_hash_indirect
4682 || h->type == bfd_link_hash_warning)
4683 h = h->u.i.link;
4684 return h;
4685 }
4686
4687 static inline struct elf_link_hash_entry *
4688 elf_follow_link (struct elf_link_hash_entry *h)
4689 {
4690 return (struct elf_link_hash_entry *) follow_link (&h->root);
4691 }
4692
4693 static inline struct ppc_link_hash_entry *
4694 ppc_follow_link (struct ppc_link_hash_entry *h)
4695 {
4696 return (struct ppc_link_hash_entry *) follow_link (&h->elf.root);
4697 }
4698
4699 /* Merge PLT info on FROM with that on TO. */
4700
4701 static void
4702 move_plt_plist (struct ppc_link_hash_entry *from,
4703 struct ppc_link_hash_entry *to)
4704 {
4705 if (from->elf.plt.plist != NULL)
4706 {
4707 if (to->elf.plt.plist != NULL)
4708 {
4709 struct plt_entry **entp;
4710 struct plt_entry *ent;
4711
4712 for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; )
4713 {
4714 struct plt_entry *dent;
4715
4716 for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next)
4717 if (dent->addend == ent->addend)
4718 {
4719 dent->plt.refcount += ent->plt.refcount;
4720 *entp = ent->next;
4721 break;
4722 }
4723 if (dent == NULL)
4724 entp = &ent->next;
4725 }
4726 *entp = to->elf.plt.plist;
4727 }
4728
4729 to->elf.plt.plist = from->elf.plt.plist;
4730 from->elf.plt.plist = NULL;
4731 }
4732 }
4733
4734 /* Copy the extra info we tack onto an elf_link_hash_entry. */
4735
4736 static void
4737 ppc64_elf_copy_indirect_symbol (struct bfd_link_info *info,
4738 struct elf_link_hash_entry *dir,
4739 struct elf_link_hash_entry *ind)
4740 {
4741 struct ppc_link_hash_entry *edir, *eind;
4742
4743 edir = (struct ppc_link_hash_entry *) dir;
4744 eind = (struct ppc_link_hash_entry *) ind;
4745
4746 edir->is_func |= eind->is_func;
4747 edir->is_func_descriptor |= eind->is_func_descriptor;
4748 edir->tls_mask |= eind->tls_mask;
4749 if (eind->oh != NULL)
4750 edir->oh = ppc_follow_link (eind->oh);
4751
4752 /* If called to transfer flags for a weakdef during processing
4753 of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF.
4754 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
4755 if (!(ELIMINATE_COPY_RELOCS
4756 && eind->elf.root.type != bfd_link_hash_indirect
4757 && edir->elf.dynamic_adjusted))
4758 edir->elf.non_got_ref |= eind->elf.non_got_ref;
4759
4760 if (edir->elf.versioned != versioned_hidden)
4761 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
4762 edir->elf.ref_regular |= eind->elf.ref_regular;
4763 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
4764 edir->elf.needs_plt |= eind->elf.needs_plt;
4765 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed;
4766
4767 /* If we were called to copy over info for a weak sym, don't copy
4768 dyn_relocs, plt/got info, or dynindx. We used to copy dyn_relocs
4769 in order to simplify readonly_dynrelocs and save a field in the
4770 symbol hash entry, but that means dyn_relocs can't be used in any
4771 tests about a specific symbol, or affect other symbol flags which
4772 are then tested.
4773 Chain weakdefs so we can get from the weakdef back to an alias.
4774 The list is circular so that we don't need to use u.weakdef as
4775 well as this list to look at all aliases. */
4776 if (eind->elf.root.type != bfd_link_hash_indirect)
4777 {
4778 struct ppc_link_hash_entry *cur, *add, *next;
4779
4780 add = eind;
4781 do
4782 {
4783 cur = edir->weakref;
4784 if (cur != NULL)
4785 {
4786 do
4787 {
4788 /* We can be called twice for the same symbols.
4789 Don't make multiple loops. */
4790 if (cur == add)
4791 return;
4792 cur = cur->weakref;
4793 } while (cur != edir);
4794 }
4795 next = add->weakref;
4796 if (cur != add)
4797 {
4798 add->weakref = edir->weakref != NULL ? edir->weakref : edir;
4799 edir->weakref = add;
4800 }
4801 add = next;
4802 } while (add != NULL && add != eind);
4803 return;
4804 }
4805
4806 /* Copy over any dynamic relocs we may have on the indirect sym. */
4807 if (eind->dyn_relocs != NULL)
4808 {
4809 if (edir->dyn_relocs != NULL)
4810 {
4811 struct elf_dyn_relocs **pp;
4812 struct elf_dyn_relocs *p;
4813
4814 /* Add reloc counts against the indirect sym to the direct sym
4815 list. Merge any entries against the same section. */
4816 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
4817 {
4818 struct elf_dyn_relocs *q;
4819
4820 for (q = edir->dyn_relocs; q != NULL; q = q->next)
4821 if (q->sec == p->sec)
4822 {
4823 q->pc_count += p->pc_count;
4824 q->count += p->count;
4825 *pp = p->next;
4826 break;
4827 }
4828 if (q == NULL)
4829 pp = &p->next;
4830 }
4831 *pp = edir->dyn_relocs;
4832 }
4833
4834 edir->dyn_relocs = eind->dyn_relocs;
4835 eind->dyn_relocs = NULL;
4836 }
4837
4838 /* Copy over got entries that we may have already seen to the
4839 symbol which just became indirect. */
4840 if (eind->elf.got.glist != NULL)
4841 {
4842 if (edir->elf.got.glist != NULL)
4843 {
4844 struct got_entry **entp;
4845 struct got_entry *ent;
4846
4847 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
4848 {
4849 struct got_entry *dent;
4850
4851 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
4852 if (dent->addend == ent->addend
4853 && dent->owner == ent->owner
4854 && dent->tls_type == ent->tls_type)
4855 {
4856 dent->got.refcount += ent->got.refcount;
4857 *entp = ent->next;
4858 break;
4859 }
4860 if (dent == NULL)
4861 entp = &ent->next;
4862 }
4863 *entp = edir->elf.got.glist;
4864 }
4865
4866 edir->elf.got.glist = eind->elf.got.glist;
4867 eind->elf.got.glist = NULL;
4868 }
4869
4870 /* And plt entries. */
4871 move_plt_plist (eind, edir);
4872
4873 if (eind->elf.dynindx != -1)
4874 {
4875 if (edir->elf.dynindx != -1)
4876 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4877 edir->elf.dynstr_index);
4878 edir->elf.dynindx = eind->elf.dynindx;
4879 edir->elf.dynstr_index = eind->elf.dynstr_index;
4880 eind->elf.dynindx = -1;
4881 eind->elf.dynstr_index = 0;
4882 }
4883 }
4884
4885 /* Find the function descriptor hash entry from the given function code
4886 hash entry FH. Link the entries via their OH fields. */
4887
4888 static struct ppc_link_hash_entry *
4889 lookup_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
4890 {
4891 struct ppc_link_hash_entry *fdh = fh->oh;
4892
4893 if (fdh == NULL)
4894 {
4895 const char *fd_name = fh->elf.root.root.string + 1;
4896
4897 fdh = (struct ppc_link_hash_entry *)
4898 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
4899 if (fdh == NULL)
4900 return fdh;
4901
4902 fdh->is_func_descriptor = 1;
4903 fdh->oh = fh;
4904 fh->is_func = 1;
4905 fh->oh = fdh;
4906 }
4907
4908 fdh = ppc_follow_link (fdh);
4909 fdh->is_func_descriptor = 1;
4910 fdh->oh = fh;
4911 return fdh;
4912 }
4913
4914 /* Make a fake function descriptor sym for the undefined code sym FH. */
4915
4916 static struct ppc_link_hash_entry *
4917 make_fdh (struct bfd_link_info *info,
4918 struct ppc_link_hash_entry *fh)
4919 {
4920 bfd *abfd = fh->elf.root.u.undef.abfd;
4921 struct bfd_link_hash_entry *bh = NULL;
4922 struct ppc_link_hash_entry *fdh;
4923 flagword flags = (fh->elf.root.type == bfd_link_hash_undefweak
4924 ? BSF_WEAK
4925 : BSF_GLOBAL);
4926
4927 if (!_bfd_generic_link_add_one_symbol (info, abfd,
4928 fh->elf.root.root.string + 1,
4929 flags, bfd_und_section_ptr, 0,
4930 NULL, FALSE, FALSE, &bh))
4931 return NULL;
4932
4933 fdh = (struct ppc_link_hash_entry *) bh;
4934 fdh->elf.non_elf = 0;
4935 fdh->fake = 1;
4936 fdh->is_func_descriptor = 1;
4937 fdh->oh = fh;
4938 fh->is_func = 1;
4939 fh->oh = fdh;
4940 return fdh;
4941 }
4942
4943 /* Fix function descriptor symbols defined in .opd sections to be
4944 function type. */
4945
4946 static bfd_boolean
4947 ppc64_elf_add_symbol_hook (bfd *ibfd,
4948 struct bfd_link_info *info,
4949 Elf_Internal_Sym *isym,
4950 const char **name,
4951 flagword *flags ATTRIBUTE_UNUSED,
4952 asection **sec,
4953 bfd_vma *value)
4954 {
4955 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC
4956 && (ibfd->flags & DYNAMIC) == 0
4957 && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour)
4958 elf_tdata (info->output_bfd)->has_gnu_symbols |= elf_gnu_symbol_ifunc;
4959
4960 if (*sec != NULL
4961 && strcmp ((*sec)->name, ".opd") == 0)
4962 {
4963 asection *code_sec;
4964
4965 if (!(ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC
4966 || ELF_ST_TYPE (isym->st_info) == STT_FUNC))
4967 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
4968
4969 /* If the symbol is a function defined in .opd, and the function
4970 code is in a discarded group, let it appear to be undefined. */
4971 if (!bfd_link_relocatable (info)
4972 && (*sec)->reloc_count != 0
4973 && opd_entry_value (*sec, *value, &code_sec, NULL,
4974 FALSE) != (bfd_vma) -1
4975 && discarded_section (code_sec))
4976 {
4977 *sec = bfd_und_section_ptr;
4978 isym->st_shndx = SHN_UNDEF;
4979 }
4980 }
4981 else if (*sec != NULL
4982 && strcmp ((*sec)->name, ".toc") == 0
4983 && ELF_ST_TYPE (isym->st_info) == STT_OBJECT)
4984 {
4985 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4986 if (htab != NULL)
4987 htab->params->object_in_toc = 1;
4988 }
4989
4990 if ((STO_PPC64_LOCAL_MASK & isym->st_other) != 0)
4991 {
4992 if (abiversion (ibfd) == 0)
4993 set_abiversion (ibfd, 2);
4994 else if (abiversion (ibfd) == 1)
4995 {
4996 info->callbacks->einfo (_("%P: symbol '%s' has invalid st_other"
4997 " for ABI version 1\n"), name);
4998 bfd_set_error (bfd_error_bad_value);
4999 return FALSE;
5000 }
5001 }
5002
5003 return TRUE;
5004 }
5005
5006 /* Merge non-visibility st_other attributes: local entry point. */
5007
5008 static void
5009 ppc64_elf_merge_symbol_attribute (struct elf_link_hash_entry *h,
5010 const Elf_Internal_Sym *isym,
5011 bfd_boolean definition,
5012 bfd_boolean dynamic)
5013 {
5014 if (definition && (!dynamic || !h->def_regular))
5015 h->other = ((isym->st_other & ~ELF_ST_VISIBILITY (-1))
5016 | ELF_ST_VISIBILITY (h->other));
5017 }
5018
5019 /* Hook called on merging a symbol. We use this to clear "fake" since
5020 we now have a real symbol. */
5021
5022 static bfd_boolean
5023 ppc64_elf_merge_symbol (struct elf_link_hash_entry *h,
5024 const Elf_Internal_Sym *isym ATTRIBUTE_UNUSED,
5025 asection **psec ATTRIBUTE_UNUSED,
5026 bfd_boolean newdef ATTRIBUTE_UNUSED,
5027 bfd_boolean olddef ATTRIBUTE_UNUSED,
5028 bfd *oldbfd ATTRIBUTE_UNUSED,
5029 const asection *oldsec ATTRIBUTE_UNUSED)
5030 {
5031 ((struct ppc_link_hash_entry *) h)->fake = 0;
5032 return TRUE;
5033 }
5034
5035 /* This function makes an old ABI object reference to ".bar" cause the
5036 inclusion of a new ABI object archive that defines "bar".
5037 NAME is a symbol defined in an archive. Return a symbol in the hash
5038 table that might be satisfied by the archive symbols. */
5039
5040 static struct elf_link_hash_entry *
5041 ppc64_elf_archive_symbol_lookup (bfd *abfd,
5042 struct bfd_link_info *info,
5043 const char *name)
5044 {
5045 struct elf_link_hash_entry *h;
5046 char *dot_name;
5047 size_t len;
5048
5049 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
5050 if (h != NULL
5051 /* Don't return this sym if it is a fake function descriptor
5052 created by add_symbol_adjust. */
5053 && !((struct ppc_link_hash_entry *) h)->fake)
5054 return h;
5055
5056 if (name[0] == '.')
5057 return h;
5058
5059 len = strlen (name);
5060 dot_name = bfd_alloc (abfd, len + 2);
5061 if (dot_name == NULL)
5062 return (struct elf_link_hash_entry *) 0 - 1;
5063 dot_name[0] = '.';
5064 memcpy (dot_name + 1, name, len + 1);
5065 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
5066 bfd_release (abfd, dot_name);
5067 return h;
5068 }
5069
5070 /* This function satisfies all old ABI object references to ".bar" if a
5071 new ABI object defines "bar". Well, at least, undefined dot symbols
5072 are made weak. This stops later archive searches from including an
5073 object if we already have a function descriptor definition. It also
5074 prevents the linker complaining about undefined symbols.
5075 We also check and correct mismatched symbol visibility here. The
5076 most restrictive visibility of the function descriptor and the
5077 function entry symbol is used. */
5078
5079 static bfd_boolean
5080 add_symbol_adjust (struct ppc_link_hash_entry *eh, struct bfd_link_info *info)
5081 {
5082 struct ppc_link_hash_table *htab;
5083 struct ppc_link_hash_entry *fdh;
5084
5085 if (eh->elf.root.type == bfd_link_hash_warning)
5086 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
5087
5088 if (eh->elf.root.type == bfd_link_hash_indirect)
5089 return TRUE;
5090
5091 if (eh->elf.root.root.string[0] != '.')
5092 abort ();
5093
5094 htab = ppc_hash_table (info);
5095 if (htab == NULL)
5096 return FALSE;
5097
5098 fdh = lookup_fdh (eh, htab);
5099 if (fdh == NULL
5100 && !bfd_link_relocatable (info)
5101 && (eh->elf.root.type == bfd_link_hash_undefined
5102 || eh->elf.root.type == bfd_link_hash_undefweak)
5103 && eh->elf.ref_regular)
5104 {
5105 /* Make an undefined function descriptor sym, in order to
5106 pull in an --as-needed shared lib. Archives are handled
5107 elsewhere. */
5108 fdh = make_fdh (info, eh);
5109 if (fdh == NULL)
5110 return FALSE;
5111 }
5112
5113 if (fdh != NULL)
5114 {
5115 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
5116 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
5117
5118 /* Make both descriptor and entry symbol have the most
5119 constraining visibility of either symbol. */
5120 if (entry_vis < descr_vis)
5121 fdh->elf.other += entry_vis - descr_vis;
5122 else if (entry_vis > descr_vis)
5123 eh->elf.other += descr_vis - entry_vis;
5124
5125 /* Propagate reference flags from entry symbol to function
5126 descriptor symbol. */
5127 fdh->elf.root.non_ir_ref_regular |= eh->elf.root.non_ir_ref_regular;
5128 fdh->elf.root.non_ir_ref_dynamic |= eh->elf.root.non_ir_ref_dynamic;
5129 fdh->elf.ref_regular |= eh->elf.ref_regular;
5130 fdh->elf.ref_regular_nonweak |= eh->elf.ref_regular_nonweak;
5131
5132 if (!fdh->elf.forced_local
5133 && fdh->elf.dynindx == -1
5134 && fdh->elf.versioned != versioned_hidden
5135 && (bfd_link_dll (info)
5136 || fdh->elf.def_dynamic
5137 || fdh->elf.ref_dynamic)
5138 && (eh->elf.ref_regular
5139 || eh->elf.def_regular))
5140 {
5141 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
5142 return FALSE;
5143 }
5144 }
5145
5146 return TRUE;
5147 }
5148
5149 /* Set up opd section info and abiversion for IBFD, and process list
5150 of dot-symbols we made in link_hash_newfunc. */
5151
5152 static bfd_boolean
5153 ppc64_elf_before_check_relocs (bfd *ibfd, struct bfd_link_info *info)
5154 {
5155 struct ppc_link_hash_table *htab;
5156 struct ppc_link_hash_entry **p, *eh;
5157 asection *opd = bfd_get_section_by_name (ibfd, ".opd");
5158
5159 if (opd != NULL && opd->size != 0)
5160 {
5161 if (abiversion (ibfd) == 0)
5162 set_abiversion (ibfd, 1);
5163 else if (abiversion (ibfd) >= 2)
5164 {
5165 /* xgettext:c-format */
5166 info->callbacks->einfo (_("%P: %B .opd not allowed in ABI"
5167 " version %d\n"),
5168 ibfd, abiversion (ibfd));
5169 bfd_set_error (bfd_error_bad_value);
5170 return FALSE;
5171 }
5172
5173 if ((ibfd->flags & DYNAMIC) == 0
5174 && (opd->flags & SEC_RELOC) != 0
5175 && opd->reloc_count != 0
5176 && !bfd_is_abs_section (opd->output_section))
5177 {
5178 /* Garbage collection needs some extra help with .opd sections.
5179 We don't want to necessarily keep everything referenced by
5180 relocs in .opd, as that would keep all functions. Instead,
5181 if we reference an .opd symbol (a function descriptor), we
5182 want to keep the function code symbol's section. This is
5183 easy for global symbols, but for local syms we need to keep
5184 information about the associated function section. */
5185 bfd_size_type amt;
5186 asection **opd_sym_map;
5187
5188 amt = OPD_NDX (opd->size) * sizeof (*opd_sym_map);
5189 opd_sym_map = bfd_zalloc (ibfd, amt);
5190 if (opd_sym_map == NULL)
5191 return FALSE;
5192 ppc64_elf_section_data (opd)->u.opd.func_sec = opd_sym_map;
5193 BFD_ASSERT (ppc64_elf_section_data (opd)->sec_type == sec_normal);
5194 ppc64_elf_section_data (opd)->sec_type = sec_opd;
5195 }
5196 }
5197
5198 if (!is_ppc64_elf (info->output_bfd))
5199 return TRUE;
5200 htab = ppc_hash_table (info);
5201 if (htab == NULL)
5202 return FALSE;
5203
5204 /* For input files without an explicit abiversion in e_flags
5205 we should have flagged any with symbol st_other bits set
5206 as ELFv1 and above flagged those with .opd as ELFv2.
5207 Set the output abiversion if not yet set, and for any input
5208 still ambiguous, take its abiversion from the output.
5209 Differences in ABI are reported later. */
5210 if (abiversion (info->output_bfd) == 0)
5211 set_abiversion (info->output_bfd, abiversion (ibfd));
5212 else if (abiversion (ibfd) == 0)
5213 set_abiversion (ibfd, abiversion (info->output_bfd));
5214
5215 p = &htab->dot_syms;
5216 while ((eh = *p) != NULL)
5217 {
5218 *p = NULL;
5219 if (&eh->elf == htab->elf.hgot)
5220 ;
5221 else if (htab->elf.hgot == NULL
5222 && strcmp (eh->elf.root.root.string, ".TOC.") == 0)
5223 htab->elf.hgot = &eh->elf;
5224 else if (abiversion (ibfd) <= 1)
5225 {
5226 htab->need_func_desc_adj = 1;
5227 if (!add_symbol_adjust (eh, info))
5228 return FALSE;
5229 }
5230 p = &eh->u.next_dot_sym;
5231 }
5232 return TRUE;
5233 }
5234
5235 /* Undo hash table changes when an --as-needed input file is determined
5236 not to be needed. */
5237
5238 static bfd_boolean
5239 ppc64_elf_notice_as_needed (bfd *ibfd,
5240 struct bfd_link_info *info,
5241 enum notice_asneeded_action act)
5242 {
5243 if (act == notice_not_needed)
5244 {
5245 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5246
5247 if (htab == NULL)
5248 return FALSE;
5249
5250 htab->dot_syms = NULL;
5251 }
5252 return _bfd_elf_notice_as_needed (ibfd, info, act);
5253 }
5254
5255 /* If --just-symbols against a final linked binary, then assume we need
5256 toc adjusting stubs when calling functions defined there. */
5257
5258 static void
5259 ppc64_elf_link_just_syms (asection *sec, struct bfd_link_info *info)
5260 {
5261 if ((sec->flags & SEC_CODE) != 0
5262 && (sec->owner->flags & (EXEC_P | DYNAMIC)) != 0
5263 && is_ppc64_elf (sec->owner))
5264 {
5265 if (abiversion (sec->owner) >= 2
5266 || bfd_get_section_by_name (sec->owner, ".opd") != NULL)
5267 sec->has_toc_reloc = 1;
5268 }
5269 _bfd_elf_link_just_syms (sec, info);
5270 }
5271
5272 static struct plt_entry **
5273 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
5274 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
5275 {
5276 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
5277 struct plt_entry **local_plt;
5278 unsigned char *local_got_tls_masks;
5279
5280 if (local_got_ents == NULL)
5281 {
5282 bfd_size_type size = symtab_hdr->sh_info;
5283
5284 size *= (sizeof (*local_got_ents)
5285 + sizeof (*local_plt)
5286 + sizeof (*local_got_tls_masks));
5287 local_got_ents = bfd_zalloc (abfd, size);
5288 if (local_got_ents == NULL)
5289 return NULL;
5290 elf_local_got_ents (abfd) = local_got_ents;
5291 }
5292
5293 if ((tls_type & (PLT_IFUNC | TLS_EXPLICIT)) == 0)
5294 {
5295 struct got_entry *ent;
5296
5297 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
5298 if (ent->addend == r_addend
5299 && ent->owner == abfd
5300 && ent->tls_type == tls_type)
5301 break;
5302 if (ent == NULL)
5303 {
5304 bfd_size_type amt = sizeof (*ent);
5305 ent = bfd_alloc (abfd, amt);
5306 if (ent == NULL)
5307 return FALSE;
5308 ent->next = local_got_ents[r_symndx];
5309 ent->addend = r_addend;
5310 ent->owner = abfd;
5311 ent->tls_type = tls_type;
5312 ent->is_indirect = FALSE;
5313 ent->got.refcount = 0;
5314 local_got_ents[r_symndx] = ent;
5315 }
5316 ent->got.refcount += 1;
5317 }
5318
5319 local_plt = (struct plt_entry **) (local_got_ents + symtab_hdr->sh_info);
5320 local_got_tls_masks = (unsigned char *) (local_plt + symtab_hdr->sh_info);
5321 local_got_tls_masks[r_symndx] |= tls_type;
5322
5323 return local_plt + r_symndx;
5324 }
5325
5326 static bfd_boolean
5327 update_plt_info (bfd *abfd, struct plt_entry **plist, bfd_vma addend)
5328 {
5329 struct plt_entry *ent;
5330
5331 for (ent = *plist; ent != NULL; ent = ent->next)
5332 if (ent->addend == addend)
5333 break;
5334 if (ent == NULL)
5335 {
5336 bfd_size_type amt = sizeof (*ent);
5337 ent = bfd_alloc (abfd, amt);
5338 if (ent == NULL)
5339 return FALSE;
5340 ent->next = *plist;
5341 ent->addend = addend;
5342 ent->plt.refcount = 0;
5343 *plist = ent;
5344 }
5345 ent->plt.refcount += 1;
5346 return TRUE;
5347 }
5348
5349 static bfd_boolean
5350 is_branch_reloc (enum elf_ppc64_reloc_type r_type)
5351 {
5352 return (r_type == R_PPC64_REL24
5353 || r_type == R_PPC64_REL14
5354 || r_type == R_PPC64_REL14_BRTAKEN
5355 || r_type == R_PPC64_REL14_BRNTAKEN
5356 || r_type == R_PPC64_ADDR24
5357 || r_type == R_PPC64_ADDR14
5358 || r_type == R_PPC64_ADDR14_BRTAKEN
5359 || r_type == R_PPC64_ADDR14_BRNTAKEN);
5360 }
5361
5362 /* Look through the relocs for a section during the first phase, and
5363 calculate needed space in the global offset table, procedure
5364 linkage table, and dynamic reloc sections. */
5365
5366 static bfd_boolean
5367 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
5368 asection *sec, const Elf_Internal_Rela *relocs)
5369 {
5370 struct ppc_link_hash_table *htab;
5371 Elf_Internal_Shdr *symtab_hdr;
5372 struct elf_link_hash_entry **sym_hashes;
5373 const Elf_Internal_Rela *rel;
5374 const Elf_Internal_Rela *rel_end;
5375 asection *sreloc;
5376 asection **opd_sym_map;
5377 struct elf_link_hash_entry *tga, *dottga;
5378
5379 if (bfd_link_relocatable (info))
5380 return TRUE;
5381
5382 /* Don't do anything special with non-loaded, non-alloced sections.
5383 In particular, any relocs in such sections should not affect GOT
5384 and PLT reference counting (ie. we don't allow them to create GOT
5385 or PLT entries), there's no possibility or desire to optimize TLS
5386 relocs, and there's not much point in propagating relocs to shared
5387 libs that the dynamic linker won't relocate. */
5388 if ((sec->flags & SEC_ALLOC) == 0)
5389 return TRUE;
5390
5391 BFD_ASSERT (is_ppc64_elf (abfd));
5392
5393 htab = ppc_hash_table (info);
5394 if (htab == NULL)
5395 return FALSE;
5396
5397 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
5398 FALSE, FALSE, TRUE);
5399 dottga = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
5400 FALSE, FALSE, TRUE);
5401 symtab_hdr = &elf_symtab_hdr (abfd);
5402 sym_hashes = elf_sym_hashes (abfd);
5403 sreloc = NULL;
5404 opd_sym_map = NULL;
5405 if (ppc64_elf_section_data (sec) != NULL
5406 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
5407 opd_sym_map = ppc64_elf_section_data (sec)->u.opd.func_sec;
5408
5409 rel_end = relocs + sec->reloc_count;
5410 for (rel = relocs; rel < rel_end; rel++)
5411 {
5412 unsigned long r_symndx;
5413 struct elf_link_hash_entry *h;
5414 enum elf_ppc64_reloc_type r_type;
5415 int tls_type;
5416 struct _ppc64_elf_section_data *ppc64_sec;
5417 struct plt_entry **ifunc, **plt_list;
5418
5419 r_symndx = ELF64_R_SYM (rel->r_info);
5420 if (r_symndx < symtab_hdr->sh_info)
5421 h = NULL;
5422 else
5423 {
5424 struct ppc_link_hash_entry *eh;
5425
5426 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5427 h = elf_follow_link (h);
5428 eh = (struct ppc_link_hash_entry *) h;
5429
5430 /* PR15323, ref flags aren't set for references in the same
5431 object. */
5432 h->root.non_ir_ref_regular = 1;
5433 if (eh->is_func && eh->oh != NULL)
5434 eh->oh->elf.root.non_ir_ref_regular = 1;
5435
5436 if (h == htab->elf.hgot)
5437 sec->has_toc_reloc = 1;
5438 }
5439
5440 tls_type = 0;
5441 ifunc = NULL;
5442 if (h != NULL)
5443 {
5444 if (h->type == STT_GNU_IFUNC)
5445 {
5446 h->needs_plt = 1;
5447 ifunc = &h->plt.plist;
5448 }
5449 }
5450 else
5451 {
5452 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5453 abfd, r_symndx);
5454 if (isym == NULL)
5455 return FALSE;
5456
5457 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
5458 {
5459 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
5460 rel->r_addend, PLT_IFUNC);
5461 if (ifunc == NULL)
5462 return FALSE;
5463 }
5464 }
5465
5466 r_type = ELF64_R_TYPE (rel->r_info);
5467 switch (r_type)
5468 {
5469 case R_PPC64_TLSGD:
5470 case R_PPC64_TLSLD:
5471 /* These special tls relocs tie a call to __tls_get_addr with
5472 its parameter symbol. */
5473 break;
5474
5475 case R_PPC64_GOT_TLSLD16:
5476 case R_PPC64_GOT_TLSLD16_LO:
5477 case R_PPC64_GOT_TLSLD16_HI:
5478 case R_PPC64_GOT_TLSLD16_HA:
5479 tls_type = TLS_TLS | TLS_LD;
5480 goto dogottls;
5481
5482 case R_PPC64_GOT_TLSGD16:
5483 case R_PPC64_GOT_TLSGD16_LO:
5484 case R_PPC64_GOT_TLSGD16_HI:
5485 case R_PPC64_GOT_TLSGD16_HA:
5486 tls_type = TLS_TLS | TLS_GD;
5487 goto dogottls;
5488
5489 case R_PPC64_GOT_TPREL16_DS:
5490 case R_PPC64_GOT_TPREL16_LO_DS:
5491 case R_PPC64_GOT_TPREL16_HI:
5492 case R_PPC64_GOT_TPREL16_HA:
5493 if (bfd_link_pic (info))
5494 info->flags |= DF_STATIC_TLS;
5495 tls_type = TLS_TLS | TLS_TPREL;
5496 goto dogottls;
5497
5498 case R_PPC64_GOT_DTPREL16_DS:
5499 case R_PPC64_GOT_DTPREL16_LO_DS:
5500 case R_PPC64_GOT_DTPREL16_HI:
5501 case R_PPC64_GOT_DTPREL16_HA:
5502 tls_type = TLS_TLS | TLS_DTPREL;
5503 dogottls:
5504 sec->has_tls_reloc = 1;
5505 /* Fall through */
5506
5507 case R_PPC64_GOT16:
5508 case R_PPC64_GOT16_DS:
5509 case R_PPC64_GOT16_HA:
5510 case R_PPC64_GOT16_HI:
5511 case R_PPC64_GOT16_LO:
5512 case R_PPC64_GOT16_LO_DS:
5513 /* This symbol requires a global offset table entry. */
5514 sec->has_toc_reloc = 1;
5515 if (r_type == R_PPC64_GOT_TLSLD16
5516 || r_type == R_PPC64_GOT_TLSGD16
5517 || r_type == R_PPC64_GOT_TPREL16_DS
5518 || r_type == R_PPC64_GOT_DTPREL16_DS
5519 || r_type == R_PPC64_GOT16
5520 || r_type == R_PPC64_GOT16_DS)
5521 {
5522 htab->do_multi_toc = 1;
5523 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5524 }
5525
5526 if (ppc64_elf_tdata (abfd)->got == NULL
5527 && !create_got_section (abfd, info))
5528 return FALSE;
5529
5530 if (h != NULL)
5531 {
5532 struct ppc_link_hash_entry *eh;
5533 struct got_entry *ent;
5534
5535 eh = (struct ppc_link_hash_entry *) h;
5536 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
5537 if (ent->addend == rel->r_addend
5538 && ent->owner == abfd
5539 && ent->tls_type == tls_type)
5540 break;
5541 if (ent == NULL)
5542 {
5543 bfd_size_type amt = sizeof (*ent);
5544 ent = bfd_alloc (abfd, amt);
5545 if (ent == NULL)
5546 return FALSE;
5547 ent->next = eh->elf.got.glist;
5548 ent->addend = rel->r_addend;
5549 ent->owner = abfd;
5550 ent->tls_type = tls_type;
5551 ent->is_indirect = FALSE;
5552 ent->got.refcount = 0;
5553 eh->elf.got.glist = ent;
5554 }
5555 ent->got.refcount += 1;
5556 eh->tls_mask |= tls_type;
5557 }
5558 else
5559 /* This is a global offset table entry for a local symbol. */
5560 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5561 rel->r_addend, tls_type))
5562 return FALSE;
5563
5564 /* We may also need a plt entry if the symbol turns out to be
5565 an ifunc. */
5566 if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1)
5567 {
5568 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5569 return FALSE;
5570 }
5571 break;
5572
5573 case R_PPC64_PLT16_HA:
5574 case R_PPC64_PLT16_HI:
5575 case R_PPC64_PLT16_LO:
5576 case R_PPC64_PLT32:
5577 case R_PPC64_PLT64:
5578 /* This symbol requires a procedure linkage table entry. */
5579 plt_list = ifunc;
5580 if (h != NULL)
5581 {
5582 h->needs_plt = 1;
5583 if (h->root.root.string[0] == '.'
5584 && h->root.root.string[1] != '\0')
5585 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5586 plt_list = &h->plt.plist;
5587 }
5588 if (plt_list == NULL)
5589 {
5590 /* It does not make sense to have a procedure linkage
5591 table entry for a non-ifunc local symbol. */
5592 info->callbacks->einfo
5593 /* xgettext:c-format */
5594 (_("%H: %s reloc against local symbol\n"),
5595 abfd, sec, rel->r_offset,
5596 ppc64_elf_howto_table[r_type]->name);
5597 bfd_set_error (bfd_error_bad_value);
5598 return FALSE;
5599 }
5600 if (!update_plt_info (abfd, plt_list, rel->r_addend))
5601 return FALSE;
5602 break;
5603
5604 /* The following relocations don't need to propagate the
5605 relocation if linking a shared object since they are
5606 section relative. */
5607 case R_PPC64_SECTOFF:
5608 case R_PPC64_SECTOFF_LO:
5609 case R_PPC64_SECTOFF_HI:
5610 case R_PPC64_SECTOFF_HA:
5611 case R_PPC64_SECTOFF_DS:
5612 case R_PPC64_SECTOFF_LO_DS:
5613 case R_PPC64_DTPREL16:
5614 case R_PPC64_DTPREL16_LO:
5615 case R_PPC64_DTPREL16_HI:
5616 case R_PPC64_DTPREL16_HA:
5617 case R_PPC64_DTPREL16_DS:
5618 case R_PPC64_DTPREL16_LO_DS:
5619 case R_PPC64_DTPREL16_HIGH:
5620 case R_PPC64_DTPREL16_HIGHA:
5621 case R_PPC64_DTPREL16_HIGHER:
5622 case R_PPC64_DTPREL16_HIGHERA:
5623 case R_PPC64_DTPREL16_HIGHEST:
5624 case R_PPC64_DTPREL16_HIGHESTA:
5625 break;
5626
5627 /* Nor do these. */
5628 case R_PPC64_REL16:
5629 case R_PPC64_REL16_LO:
5630 case R_PPC64_REL16_HI:
5631 case R_PPC64_REL16_HA:
5632 case R_PPC64_REL16DX_HA:
5633 break;
5634
5635 /* Not supported as a dynamic relocation. */
5636 case R_PPC64_ADDR64_LOCAL:
5637 if (bfd_link_pic (info))
5638 {
5639 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
5640 ppc_howto_init ();
5641 /* xgettext:c-format */
5642 info->callbacks->einfo (_("%H: %s reloc unsupported "
5643 "in shared libraries and PIEs.\n"),
5644 abfd, sec, rel->r_offset,
5645 ppc64_elf_howto_table[r_type]->name);
5646 bfd_set_error (bfd_error_bad_value);
5647 return FALSE;
5648 }
5649 break;
5650
5651 case R_PPC64_TOC16:
5652 case R_PPC64_TOC16_DS:
5653 htab->do_multi_toc = 1;
5654 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5655 /* Fall through. */
5656 case R_PPC64_TOC16_LO:
5657 case R_PPC64_TOC16_HI:
5658 case R_PPC64_TOC16_HA:
5659 case R_PPC64_TOC16_LO_DS:
5660 sec->has_toc_reloc = 1;
5661 break;
5662
5663 /* Marker reloc. */
5664 case R_PPC64_ENTRY:
5665 break;
5666
5667 /* This relocation describes the C++ object vtable hierarchy.
5668 Reconstruct it for later use during GC. */
5669 case R_PPC64_GNU_VTINHERIT:
5670 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
5671 return FALSE;
5672 break;
5673
5674 /* This relocation describes which C++ vtable entries are actually
5675 used. Record for later use during GC. */
5676 case R_PPC64_GNU_VTENTRY:
5677 BFD_ASSERT (h != NULL);
5678 if (h != NULL
5679 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
5680 return FALSE;
5681 break;
5682
5683 case R_PPC64_REL14:
5684 case R_PPC64_REL14_BRTAKEN:
5685 case R_PPC64_REL14_BRNTAKEN:
5686 {
5687 asection *dest = NULL;
5688
5689 /* Heuristic: If jumping outside our section, chances are
5690 we are going to need a stub. */
5691 if (h != NULL)
5692 {
5693 /* If the sym is weak it may be overridden later, so
5694 don't assume we know where a weak sym lives. */
5695 if (h->root.type == bfd_link_hash_defined)
5696 dest = h->root.u.def.section;
5697 }
5698 else
5699 {
5700 Elf_Internal_Sym *isym;
5701
5702 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5703 abfd, r_symndx);
5704 if (isym == NULL)
5705 return FALSE;
5706
5707 dest = bfd_section_from_elf_index (abfd, isym->st_shndx);
5708 }
5709
5710 if (dest != sec)
5711 ppc64_elf_section_data (sec)->has_14bit_branch = 1;
5712 }
5713 /* Fall through. */
5714
5715 case R_PPC64_REL24:
5716 plt_list = ifunc;
5717 if (h != NULL)
5718 {
5719 h->needs_plt = 1;
5720 if (h->root.root.string[0] == '.'
5721 && h->root.root.string[1] != '\0')
5722 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5723
5724 if (h == tga || h == dottga)
5725 {
5726 sec->has_tls_reloc = 1;
5727 if (rel != relocs
5728 && (ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSGD
5729 || ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSLD))
5730 /* We have a new-style __tls_get_addr call with
5731 a marker reloc. */
5732 ;
5733 else
5734 /* Mark this section as having an old-style call. */
5735 sec->has_tls_get_addr_call = 1;
5736 }
5737 plt_list = &h->plt.plist;
5738 }
5739
5740 /* We may need a .plt entry if the function this reloc
5741 refers to is in a shared lib. */
5742 if (plt_list
5743 && !update_plt_info (abfd, plt_list, rel->r_addend))
5744 return FALSE;
5745 break;
5746
5747 case R_PPC64_ADDR14:
5748 case R_PPC64_ADDR14_BRNTAKEN:
5749 case R_PPC64_ADDR14_BRTAKEN:
5750 case R_PPC64_ADDR24:
5751 goto dodyn;
5752
5753 case R_PPC64_TPREL64:
5754 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
5755 if (bfd_link_pic (info))
5756 info->flags |= DF_STATIC_TLS;
5757 goto dotlstoc;
5758
5759 case R_PPC64_DTPMOD64:
5760 if (rel + 1 < rel_end
5761 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
5762 && rel[1].r_offset == rel->r_offset + 8)
5763 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
5764 else
5765 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
5766 goto dotlstoc;
5767
5768 case R_PPC64_DTPREL64:
5769 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
5770 if (rel != relocs
5771 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
5772 && rel[-1].r_offset == rel->r_offset - 8)
5773 /* This is the second reloc of a dtpmod, dtprel pair.
5774 Don't mark with TLS_DTPREL. */
5775 goto dodyn;
5776
5777 dotlstoc:
5778 sec->has_tls_reloc = 1;
5779 if (h != NULL)
5780 {
5781 struct ppc_link_hash_entry *eh;
5782 eh = (struct ppc_link_hash_entry *) h;
5783 eh->tls_mask |= tls_type;
5784 }
5785 else
5786 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5787 rel->r_addend, tls_type))
5788 return FALSE;
5789
5790 ppc64_sec = ppc64_elf_section_data (sec);
5791 if (ppc64_sec->sec_type != sec_toc)
5792 {
5793 bfd_size_type amt;
5794
5795 /* One extra to simplify get_tls_mask. */
5796 amt = sec->size * sizeof (unsigned) / 8 + sizeof (unsigned);
5797 ppc64_sec->u.toc.symndx = bfd_zalloc (abfd, amt);
5798 if (ppc64_sec->u.toc.symndx == NULL)
5799 return FALSE;
5800 amt = sec->size * sizeof (bfd_vma) / 8;
5801 ppc64_sec->u.toc.add = bfd_zalloc (abfd, amt);
5802 if (ppc64_sec->u.toc.add == NULL)
5803 return FALSE;
5804 BFD_ASSERT (ppc64_sec->sec_type == sec_normal);
5805 ppc64_sec->sec_type = sec_toc;
5806 }
5807 BFD_ASSERT (rel->r_offset % 8 == 0);
5808 ppc64_sec->u.toc.symndx[rel->r_offset / 8] = r_symndx;
5809 ppc64_sec->u.toc.add[rel->r_offset / 8] = rel->r_addend;
5810
5811 /* Mark the second slot of a GD or LD entry.
5812 -1 to indicate GD and -2 to indicate LD. */
5813 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
5814 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -1;
5815 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
5816 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -2;
5817 goto dodyn;
5818
5819 case R_PPC64_TPREL16:
5820 case R_PPC64_TPREL16_LO:
5821 case R_PPC64_TPREL16_HI:
5822 case R_PPC64_TPREL16_HA:
5823 case R_PPC64_TPREL16_DS:
5824 case R_PPC64_TPREL16_LO_DS:
5825 case R_PPC64_TPREL16_HIGH:
5826 case R_PPC64_TPREL16_HIGHA:
5827 case R_PPC64_TPREL16_HIGHER:
5828 case R_PPC64_TPREL16_HIGHERA:
5829 case R_PPC64_TPREL16_HIGHEST:
5830 case R_PPC64_TPREL16_HIGHESTA:
5831 if (bfd_link_pic (info))
5832 {
5833 info->flags |= DF_STATIC_TLS;
5834 goto dodyn;
5835 }
5836 break;
5837
5838 case R_PPC64_ADDR64:
5839 if (opd_sym_map != NULL
5840 && rel + 1 < rel_end
5841 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
5842 {
5843 if (h != NULL)
5844 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5845 else
5846 {
5847 asection *s;
5848 Elf_Internal_Sym *isym;
5849
5850 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5851 abfd, r_symndx);
5852 if (isym == NULL)
5853 return FALSE;
5854
5855 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5856 if (s != NULL && s != sec)
5857 opd_sym_map[OPD_NDX (rel->r_offset)] = s;
5858 }
5859 }
5860 /* Fall through. */
5861
5862 case R_PPC64_ADDR16:
5863 case R_PPC64_ADDR16_DS:
5864 case R_PPC64_ADDR16_HA:
5865 case R_PPC64_ADDR16_HI:
5866 case R_PPC64_ADDR16_HIGH:
5867 case R_PPC64_ADDR16_HIGHA:
5868 case R_PPC64_ADDR16_HIGHER:
5869 case R_PPC64_ADDR16_HIGHERA:
5870 case R_PPC64_ADDR16_HIGHEST:
5871 case R_PPC64_ADDR16_HIGHESTA:
5872 case R_PPC64_ADDR16_LO:
5873 case R_PPC64_ADDR16_LO_DS:
5874 if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1
5875 && rel->r_addend == 0)
5876 {
5877 /* We may need a .plt entry if this reloc refers to a
5878 function in a shared lib. */
5879 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5880 return FALSE;
5881 h->pointer_equality_needed = 1;
5882 }
5883 /* Fall through. */
5884
5885 case R_PPC64_REL30:
5886 case R_PPC64_REL32:
5887 case R_PPC64_REL64:
5888 case R_PPC64_ADDR32:
5889 case R_PPC64_UADDR16:
5890 case R_PPC64_UADDR32:
5891 case R_PPC64_UADDR64:
5892 case R_PPC64_TOC:
5893 if (h != NULL && !bfd_link_pic (info))
5894 /* We may need a copy reloc. */
5895 h->non_got_ref = 1;
5896
5897 /* Don't propagate .opd relocs. */
5898 if (NO_OPD_RELOCS && opd_sym_map != NULL)
5899 break;
5900
5901 /* If we are creating a shared library, and this is a reloc
5902 against a global symbol, or a non PC relative reloc
5903 against a local symbol, then we need to copy the reloc
5904 into the shared library. However, if we are linking with
5905 -Bsymbolic, we do not need to copy a reloc against a
5906 global symbol which is defined in an object we are
5907 including in the link (i.e., DEF_REGULAR is set). At
5908 this point we have not seen all the input files, so it is
5909 possible that DEF_REGULAR is not set now but will be set
5910 later (it is never cleared). In case of a weak definition,
5911 DEF_REGULAR may be cleared later by a strong definition in
5912 a shared library. We account for that possibility below by
5913 storing information in the dyn_relocs field of the hash
5914 table entry. A similar situation occurs when creating
5915 shared libraries and symbol visibility changes render the
5916 symbol local.
5917
5918 If on the other hand, we are creating an executable, we
5919 may need to keep relocations for symbols satisfied by a
5920 dynamic library if we manage to avoid copy relocs for the
5921 symbol. */
5922 dodyn:
5923 if ((bfd_link_pic (info)
5924 && (must_be_dyn_reloc (info, r_type)
5925 || (h != NULL
5926 && (!SYMBOLIC_BIND (info, h)
5927 || h->root.type == bfd_link_hash_defweak
5928 || !h->def_regular))))
5929 || (ELIMINATE_COPY_RELOCS
5930 && !bfd_link_pic (info)
5931 && h != NULL
5932 && (h->root.type == bfd_link_hash_defweak
5933 || !h->def_regular))
5934 || (!bfd_link_pic (info)
5935 && ifunc != NULL))
5936 {
5937 /* We must copy these reloc types into the output file.
5938 Create a reloc section in dynobj and make room for
5939 this reloc. */
5940 if (sreloc == NULL)
5941 {
5942 sreloc = _bfd_elf_make_dynamic_reloc_section
5943 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
5944
5945 if (sreloc == NULL)
5946 return FALSE;
5947 }
5948
5949 /* If this is a global symbol, we count the number of
5950 relocations we need for this symbol. */
5951 if (h != NULL)
5952 {
5953 struct elf_dyn_relocs *p;
5954 struct elf_dyn_relocs **head;
5955
5956 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
5957 p = *head;
5958 if (p == NULL || p->sec != sec)
5959 {
5960 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5961 if (p == NULL)
5962 return FALSE;
5963 p->next = *head;
5964 *head = p;
5965 p->sec = sec;
5966 p->count = 0;
5967 p->pc_count = 0;
5968 }
5969 p->count += 1;
5970 if (!must_be_dyn_reloc (info, r_type))
5971 p->pc_count += 1;
5972 }
5973 else
5974 {
5975 /* Track dynamic relocs needed for local syms too.
5976 We really need local syms available to do this
5977 easily. Oh well. */
5978 struct ppc_dyn_relocs *p;
5979 struct ppc_dyn_relocs **head;
5980 bfd_boolean is_ifunc;
5981 asection *s;
5982 void *vpp;
5983 Elf_Internal_Sym *isym;
5984
5985 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5986 abfd, r_symndx);
5987 if (isym == NULL)
5988 return FALSE;
5989
5990 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5991 if (s == NULL)
5992 s = sec;
5993
5994 vpp = &elf_section_data (s)->local_dynrel;
5995 head = (struct ppc_dyn_relocs **) vpp;
5996 is_ifunc = ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC;
5997 p = *head;
5998 if (p != NULL && p->sec == sec && p->ifunc != is_ifunc)
5999 p = p->next;
6000 if (p == NULL || p->sec != sec || p->ifunc != is_ifunc)
6001 {
6002 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
6003 if (p == NULL)
6004 return FALSE;
6005 p->next = *head;
6006 *head = p;
6007 p->sec = sec;
6008 p->ifunc = is_ifunc;
6009 p->count = 0;
6010 }
6011 p->count += 1;
6012 }
6013 }
6014 break;
6015
6016 default:
6017 break;
6018 }
6019 }
6020
6021 return TRUE;
6022 }
6023
6024 /* Merge backend specific data from an object file to the output
6025 object file when linking. */
6026
6027 static bfd_boolean
6028 ppc64_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
6029 {
6030 bfd *obfd = info->output_bfd;
6031 unsigned long iflags, oflags;
6032
6033 if ((ibfd->flags & BFD_LINKER_CREATED) != 0)
6034 return TRUE;
6035
6036 if (!is_ppc64_elf (ibfd) || !is_ppc64_elf (obfd))
6037 return TRUE;
6038
6039 if (!_bfd_generic_verify_endian_match (ibfd, info))
6040 return FALSE;
6041
6042 iflags = elf_elfheader (ibfd)->e_flags;
6043 oflags = elf_elfheader (obfd)->e_flags;
6044
6045 if (iflags & ~EF_PPC64_ABI)
6046 {
6047 _bfd_error_handler
6048 /* xgettext:c-format */
6049 (_("%B uses unknown e_flags 0x%lx"), ibfd, iflags);
6050 bfd_set_error (bfd_error_bad_value);
6051 return FALSE;
6052 }
6053 else if (iflags != oflags && iflags != 0)
6054 {
6055 _bfd_error_handler
6056 /* xgettext:c-format */
6057 (_("%B: ABI version %ld is not compatible with ABI version %ld output"),
6058 ibfd, iflags, oflags);
6059 bfd_set_error (bfd_error_bad_value);
6060 return FALSE;
6061 }
6062
6063 _bfd_elf_ppc_merge_fp_attributes (ibfd, info);
6064
6065 /* Merge Tag_compatibility attributes and any common GNU ones. */
6066 _bfd_elf_merge_object_attributes (ibfd, info);
6067
6068 return TRUE;
6069 }
6070
6071 static bfd_boolean
6072 ppc64_elf_print_private_bfd_data (bfd *abfd, void *ptr)
6073 {
6074 /* Print normal ELF private data. */
6075 _bfd_elf_print_private_bfd_data (abfd, ptr);
6076
6077 if (elf_elfheader (abfd)->e_flags != 0)
6078 {
6079 FILE *file = ptr;
6080
6081 fprintf (file, _("private flags = 0x%lx:"),
6082 elf_elfheader (abfd)->e_flags);
6083
6084 if ((elf_elfheader (abfd)->e_flags & EF_PPC64_ABI) != 0)
6085 fprintf (file, _(" [abiv%ld]"),
6086 elf_elfheader (abfd)->e_flags & EF_PPC64_ABI);
6087 fputc ('\n', file);
6088 }
6089
6090 return TRUE;
6091 }
6092
6093 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
6094 of the code entry point, and its section, which must be in the same
6095 object as OPD_SEC. Returns (bfd_vma) -1 on error. */
6096
6097 static bfd_vma
6098 opd_entry_value (asection *opd_sec,
6099 bfd_vma offset,
6100 asection **code_sec,
6101 bfd_vma *code_off,
6102 bfd_boolean in_code_sec)
6103 {
6104 bfd *opd_bfd = opd_sec->owner;
6105 Elf_Internal_Rela *relocs;
6106 Elf_Internal_Rela *lo, *hi, *look;
6107 bfd_vma val;
6108
6109 /* No relocs implies we are linking a --just-symbols object, or looking
6110 at a final linked executable with addr2line or somesuch. */
6111 if (opd_sec->reloc_count == 0)
6112 {
6113 bfd_byte *contents = ppc64_elf_tdata (opd_bfd)->opd.contents;
6114
6115 if (contents == NULL)
6116 {
6117 if (!bfd_malloc_and_get_section (opd_bfd, opd_sec, &contents))
6118 return (bfd_vma) -1;
6119 ppc64_elf_tdata (opd_bfd)->opd.contents = contents;
6120 }
6121
6122 /* PR 17512: file: 64b9dfbb. */
6123 if (offset + 7 >= opd_sec->size || offset + 7 < offset)
6124 return (bfd_vma) -1;
6125
6126 val = bfd_get_64 (opd_bfd, contents + offset);
6127 if (code_sec != NULL)
6128 {
6129 asection *sec, *likely = NULL;
6130
6131 if (in_code_sec)
6132 {
6133 sec = *code_sec;
6134 if (sec->vma <= val
6135 && val < sec->vma + sec->size)
6136 likely = sec;
6137 else
6138 val = -1;
6139 }
6140 else
6141 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
6142 if (sec->vma <= val
6143 && (sec->flags & SEC_LOAD) != 0
6144 && (sec->flags & SEC_ALLOC) != 0)
6145 likely = sec;
6146 if (likely != NULL)
6147 {
6148 *code_sec = likely;
6149 if (code_off != NULL)
6150 *code_off = val - likely->vma;
6151 }
6152 }
6153 return val;
6154 }
6155
6156 BFD_ASSERT (is_ppc64_elf (opd_bfd));
6157
6158 relocs = ppc64_elf_tdata (opd_bfd)->opd.relocs;
6159 if (relocs == NULL)
6160 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
6161 /* PR 17512: file: df8e1fd6. */
6162 if (relocs == NULL)
6163 return (bfd_vma) -1;
6164
6165 /* Go find the opd reloc at the sym address. */
6166 lo = relocs;
6167 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
6168 val = (bfd_vma) -1;
6169 while (lo < hi)
6170 {
6171 look = lo + (hi - lo) / 2;
6172 if (look->r_offset < offset)
6173 lo = look + 1;
6174 else if (look->r_offset > offset)
6175 hi = look;
6176 else
6177 {
6178 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (opd_bfd);
6179
6180 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
6181 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
6182 {
6183 unsigned long symndx = ELF64_R_SYM (look->r_info);
6184 asection *sec = NULL;
6185
6186 if (symndx >= symtab_hdr->sh_info
6187 && elf_sym_hashes (opd_bfd) != NULL)
6188 {
6189 struct elf_link_hash_entry **sym_hashes;
6190 struct elf_link_hash_entry *rh;
6191
6192 sym_hashes = elf_sym_hashes (opd_bfd);
6193 rh = sym_hashes[symndx - symtab_hdr->sh_info];
6194 if (rh != NULL)
6195 {
6196 rh = elf_follow_link (rh);
6197 if (rh->root.type != bfd_link_hash_defined
6198 && rh->root.type != bfd_link_hash_defweak)
6199 break;
6200 if (rh->root.u.def.section->owner == opd_bfd)
6201 {
6202 val = rh->root.u.def.value;
6203 sec = rh->root.u.def.section;
6204 }
6205 }
6206 }
6207
6208 if (sec == NULL)
6209 {
6210 Elf_Internal_Sym *sym;
6211
6212 if (symndx < symtab_hdr->sh_info)
6213 {
6214 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
6215 if (sym == NULL)
6216 {
6217 size_t symcnt = symtab_hdr->sh_info;
6218 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
6219 symcnt, 0,
6220 NULL, NULL, NULL);
6221 if (sym == NULL)
6222 break;
6223 symtab_hdr->contents = (bfd_byte *) sym;
6224 }
6225 sym += symndx;
6226 }
6227 else
6228 {
6229 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
6230 1, symndx,
6231 NULL, NULL, NULL);
6232 if (sym == NULL)
6233 break;
6234 }
6235 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
6236 if (sec == NULL)
6237 break;
6238 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
6239 val = sym->st_value;
6240 }
6241
6242 val += look->r_addend;
6243 if (code_off != NULL)
6244 *code_off = val;
6245 if (code_sec != NULL)
6246 {
6247 if (in_code_sec && *code_sec != sec)
6248 return -1;
6249 else
6250 *code_sec = sec;
6251 }
6252 if (sec->output_section != NULL)
6253 val += sec->output_section->vma + sec->output_offset;
6254 }
6255 break;
6256 }
6257 }
6258
6259 return val;
6260 }
6261
6262 /* If the ELF symbol SYM might be a function in SEC, return the
6263 function size and set *CODE_OFF to the function's entry point,
6264 otherwise return zero. */
6265
6266 static bfd_size_type
6267 ppc64_elf_maybe_function_sym (const asymbol *sym, asection *sec,
6268 bfd_vma *code_off)
6269 {
6270 bfd_size_type size;
6271
6272 if ((sym->flags & (BSF_SECTION_SYM | BSF_FILE | BSF_OBJECT
6273 | BSF_THREAD_LOCAL | BSF_RELC | BSF_SRELC)) != 0)
6274 return 0;
6275
6276 size = 0;
6277 if (!(sym->flags & BSF_SYNTHETIC))
6278 size = ((elf_symbol_type *) sym)->internal_elf_sym.st_size;
6279
6280 if (strcmp (sym->section->name, ".opd") == 0)
6281 {
6282 struct _opd_sec_data *opd = get_opd_info (sym->section);
6283 bfd_vma symval = sym->value;
6284
6285 if (opd != NULL
6286 && opd->adjust != NULL
6287 && elf_section_data (sym->section)->relocs != NULL)
6288 {
6289 /* opd_entry_value will use cached relocs that have been
6290 adjusted, but with raw symbols. That means both local
6291 and global symbols need adjusting. */
6292 long adjust = opd->adjust[OPD_NDX (symval)];
6293 if (adjust == -1)
6294 return 0;
6295 symval += adjust;
6296 }
6297
6298 if (opd_entry_value (sym->section, symval,
6299 &sec, code_off, TRUE) == (bfd_vma) -1)
6300 return 0;
6301 /* An old ABI binary with dot-syms has a size of 24 on the .opd
6302 symbol. This size has nothing to do with the code size of the
6303 function, which is what we're supposed to return, but the
6304 code size isn't available without looking up the dot-sym.
6305 However, doing that would be a waste of time particularly
6306 since elf_find_function will look at the dot-sym anyway.
6307 Now, elf_find_function will keep the largest size of any
6308 function sym found at the code address of interest, so return
6309 1 here to avoid it incorrectly caching a larger function size
6310 for a small function. This does mean we return the wrong
6311 size for a new-ABI function of size 24, but all that does is
6312 disable caching for such functions. */
6313 if (size == 24)
6314 size = 1;
6315 }
6316 else
6317 {
6318 if (sym->section != sec)
6319 return 0;
6320 *code_off = sym->value;
6321 }
6322 if (size == 0)
6323 size = 1;
6324 return size;
6325 }
6326
6327 /* Return true if symbol is a strong function defined in an ELFv2
6328 object with st_other localentry bits of zero, ie. its local entry
6329 point coincides with its global entry point. */
6330
6331 static bfd_boolean
6332 is_elfv2_localentry0 (struct elf_link_hash_entry *h)
6333 {
6334 return (h != NULL
6335 && h->type == STT_FUNC
6336 && h->root.type == bfd_link_hash_defined
6337 && (STO_PPC64_LOCAL_MASK & h->other) == 0
6338 && is_ppc64_elf (h->root.u.def.section->owner)
6339 && abiversion (h->root.u.def.section->owner) >= 2);
6340 }
6341
6342 /* Return true if symbol is defined in a regular object file. */
6343
6344 static bfd_boolean
6345 is_static_defined (struct elf_link_hash_entry *h)
6346 {
6347 return ((h->root.type == bfd_link_hash_defined
6348 || h->root.type == bfd_link_hash_defweak)
6349 && h->root.u.def.section != NULL
6350 && h->root.u.def.section->output_section != NULL);
6351 }
6352
6353 /* If FDH is a function descriptor symbol, return the associated code
6354 entry symbol if it is defined. Return NULL otherwise. */
6355
6356 static struct ppc_link_hash_entry *
6357 defined_code_entry (struct ppc_link_hash_entry *fdh)
6358 {
6359 if (fdh->is_func_descriptor)
6360 {
6361 struct ppc_link_hash_entry *fh = ppc_follow_link (fdh->oh);
6362 if (fh->elf.root.type == bfd_link_hash_defined
6363 || fh->elf.root.type == bfd_link_hash_defweak)
6364 return fh;
6365 }
6366 return NULL;
6367 }
6368
6369 /* If FH is a function code entry symbol, return the associated
6370 function descriptor symbol if it is defined. Return NULL otherwise. */
6371
6372 static struct ppc_link_hash_entry *
6373 defined_func_desc (struct ppc_link_hash_entry *fh)
6374 {
6375 if (fh->oh != NULL
6376 && fh->oh->is_func_descriptor)
6377 {
6378 struct ppc_link_hash_entry *fdh = ppc_follow_link (fh->oh);
6379 if (fdh->elf.root.type == bfd_link_hash_defined
6380 || fdh->elf.root.type == bfd_link_hash_defweak)
6381 return fdh;
6382 }
6383 return NULL;
6384 }
6385
6386 static bfd_boolean func_desc_adjust (struct elf_link_hash_entry *, void *);
6387
6388 /* Garbage collect sections, after first dealing with dot-symbols. */
6389
6390 static bfd_boolean
6391 ppc64_elf_gc_sections (bfd *abfd, struct bfd_link_info *info)
6392 {
6393 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6394
6395 if (htab != NULL && htab->need_func_desc_adj)
6396 {
6397 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
6398 htab->need_func_desc_adj = 0;
6399 }
6400 return bfd_elf_gc_sections (abfd, info);
6401 }
6402
6403 /* Mark all our entry sym sections, both opd and code section. */
6404
6405 static void
6406 ppc64_elf_gc_keep (struct bfd_link_info *info)
6407 {
6408 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6409 struct bfd_sym_chain *sym;
6410
6411 if (htab == NULL)
6412 return;
6413
6414 for (sym = info->gc_sym_list; sym != NULL; sym = sym->next)
6415 {
6416 struct ppc_link_hash_entry *eh, *fh;
6417 asection *sec;
6418
6419 eh = (struct ppc_link_hash_entry *)
6420 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, TRUE);
6421 if (eh == NULL)
6422 continue;
6423 if (eh->elf.root.type != bfd_link_hash_defined
6424 && eh->elf.root.type != bfd_link_hash_defweak)
6425 continue;
6426
6427 fh = defined_code_entry (eh);
6428 if (fh != NULL)
6429 {
6430 sec = fh->elf.root.u.def.section;
6431 sec->flags |= SEC_KEEP;
6432 }
6433 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6434 && opd_entry_value (eh->elf.root.u.def.section,
6435 eh->elf.root.u.def.value,
6436 &sec, NULL, FALSE) != (bfd_vma) -1)
6437 sec->flags |= SEC_KEEP;
6438
6439 sec = eh->elf.root.u.def.section;
6440 sec->flags |= SEC_KEEP;
6441 }
6442 }
6443
6444 /* Mark sections containing dynamically referenced symbols. When
6445 building shared libraries, we must assume that any visible symbol is
6446 referenced. */
6447
6448 static bfd_boolean
6449 ppc64_elf_gc_mark_dynamic_ref (struct elf_link_hash_entry *h, void *inf)
6450 {
6451 struct bfd_link_info *info = (struct bfd_link_info *) inf;
6452 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
6453 struct ppc_link_hash_entry *fdh;
6454 struct bfd_elf_dynamic_list *d = info->dynamic_list;
6455
6456 /* Dynamic linking info is on the func descriptor sym. */
6457 fdh = defined_func_desc (eh);
6458 if (fdh != NULL)
6459 eh = fdh;
6460
6461 if ((eh->elf.root.type == bfd_link_hash_defined
6462 || eh->elf.root.type == bfd_link_hash_defweak)
6463 && (eh->elf.ref_dynamic
6464 || ((eh->elf.def_regular || ELF_COMMON_DEF_P (&eh->elf))
6465 && ELF_ST_VISIBILITY (eh->elf.other) != STV_INTERNAL
6466 && ELF_ST_VISIBILITY (eh->elf.other) != STV_HIDDEN
6467 && (!bfd_link_executable (info)
6468 || info->gc_keep_exported
6469 || info->export_dynamic
6470 || (eh->elf.dynamic
6471 && d != NULL
6472 && (*d->match) (&d->head, NULL, eh->elf.root.root.string)))
6473 && (eh->elf.versioned >= versioned
6474 || !bfd_hide_sym_by_version (info->version_info,
6475 eh->elf.root.root.string)))))
6476 {
6477 asection *code_sec;
6478 struct ppc_link_hash_entry *fh;
6479
6480 eh->elf.root.u.def.section->flags |= SEC_KEEP;
6481
6482 /* Function descriptor syms cause the associated
6483 function code sym section to be marked. */
6484 fh = defined_code_entry (eh);
6485 if (fh != NULL)
6486 {
6487 code_sec = fh->elf.root.u.def.section;
6488 code_sec->flags |= SEC_KEEP;
6489 }
6490 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6491 && opd_entry_value (eh->elf.root.u.def.section,
6492 eh->elf.root.u.def.value,
6493 &code_sec, NULL, FALSE) != (bfd_vma) -1)
6494 code_sec->flags |= SEC_KEEP;
6495 }
6496
6497 return TRUE;
6498 }
6499
6500 /* Return the section that should be marked against GC for a given
6501 relocation. */
6502
6503 static asection *
6504 ppc64_elf_gc_mark_hook (asection *sec,
6505 struct bfd_link_info *info,
6506 Elf_Internal_Rela *rel,
6507 struct elf_link_hash_entry *h,
6508 Elf_Internal_Sym *sym)
6509 {
6510 asection *rsec;
6511
6512 /* Syms return NULL if we're marking .opd, so we avoid marking all
6513 function sections, as all functions are referenced in .opd. */
6514 rsec = NULL;
6515 if (get_opd_info (sec) != NULL)
6516 return rsec;
6517
6518 if (h != NULL)
6519 {
6520 enum elf_ppc64_reloc_type r_type;
6521 struct ppc_link_hash_entry *eh, *fh, *fdh;
6522
6523 r_type = ELF64_R_TYPE (rel->r_info);
6524 switch (r_type)
6525 {
6526 case R_PPC64_GNU_VTINHERIT:
6527 case R_PPC64_GNU_VTENTRY:
6528 break;
6529
6530 default:
6531 switch (h->root.type)
6532 {
6533 case bfd_link_hash_defined:
6534 case bfd_link_hash_defweak:
6535 eh = (struct ppc_link_hash_entry *) h;
6536 fdh = defined_func_desc (eh);
6537 if (fdh != NULL)
6538 {
6539 /* -mcall-aixdesc code references the dot-symbol on
6540 a call reloc. Mark the function descriptor too
6541 against garbage collection. */
6542 fdh->elf.mark = 1;
6543 if (fdh->elf.u.weakdef != NULL)
6544 fdh->elf.u.weakdef->mark = 1;
6545 eh = fdh;
6546 }
6547
6548 /* Function descriptor syms cause the associated
6549 function code sym section to be marked. */
6550 fh = defined_code_entry (eh);
6551 if (fh != NULL)
6552 {
6553 /* They also mark their opd section. */
6554 eh->elf.root.u.def.section->gc_mark = 1;
6555
6556 rsec = fh->elf.root.u.def.section;
6557 }
6558 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6559 && opd_entry_value (eh->elf.root.u.def.section,
6560 eh->elf.root.u.def.value,
6561 &rsec, NULL, FALSE) != (bfd_vma) -1)
6562 eh->elf.root.u.def.section->gc_mark = 1;
6563 else
6564 rsec = h->root.u.def.section;
6565 break;
6566
6567 case bfd_link_hash_common:
6568 rsec = h->root.u.c.p->section;
6569 break;
6570
6571 default:
6572 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
6573 }
6574 }
6575 }
6576 else
6577 {
6578 struct _opd_sec_data *opd;
6579
6580 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
6581 opd = get_opd_info (rsec);
6582 if (opd != NULL && opd->func_sec != NULL)
6583 {
6584 rsec->gc_mark = 1;
6585
6586 rsec = opd->func_sec[OPD_NDX (sym->st_value + rel->r_addend)];
6587 }
6588 }
6589
6590 return rsec;
6591 }
6592
6593 /* Update the .got, .plt. and dynamic reloc reference counts for the
6594 section being removed. */
6595
6596 static bfd_boolean
6597 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
6598 asection *sec, const Elf_Internal_Rela *relocs)
6599 {
6600 struct ppc_link_hash_table *htab;
6601 Elf_Internal_Shdr *symtab_hdr;
6602 struct elf_link_hash_entry **sym_hashes;
6603 struct got_entry **local_got_ents;
6604 const Elf_Internal_Rela *rel, *relend;
6605
6606 if (bfd_link_relocatable (info))
6607 return TRUE;
6608
6609 if ((sec->flags & SEC_ALLOC) == 0)
6610 return TRUE;
6611
6612 elf_section_data (sec)->local_dynrel = NULL;
6613
6614 htab = ppc_hash_table (info);
6615 if (htab == NULL)
6616 return FALSE;
6617
6618 symtab_hdr = &elf_symtab_hdr (abfd);
6619 sym_hashes = elf_sym_hashes (abfd);
6620 local_got_ents = elf_local_got_ents (abfd);
6621
6622 relend = relocs + sec->reloc_count;
6623 for (rel = relocs; rel < relend; rel++)
6624 {
6625 unsigned long r_symndx;
6626 enum elf_ppc64_reloc_type r_type;
6627 struct elf_link_hash_entry *h = NULL;
6628 struct plt_entry **plt_list = NULL;
6629 unsigned char tls_type = 0;
6630
6631 r_symndx = ELF64_R_SYM (rel->r_info);
6632 r_type = ELF64_R_TYPE (rel->r_info);
6633 if (r_symndx >= symtab_hdr->sh_info)
6634 {
6635 struct ppc_link_hash_entry *eh;
6636 struct elf_dyn_relocs **pp;
6637 struct elf_dyn_relocs *p;
6638
6639 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
6640 h = elf_follow_link (h);
6641 eh = (struct ppc_link_hash_entry *) h;
6642
6643 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
6644 if (p->sec == sec)
6645 {
6646 /* Everything must go for SEC. */
6647 *pp = p->next;
6648 break;
6649 }
6650 }
6651
6652 switch (r_type)
6653 {
6654 case R_PPC64_GOT_TLSLD16:
6655 case R_PPC64_GOT_TLSLD16_LO:
6656 case R_PPC64_GOT_TLSLD16_HI:
6657 case R_PPC64_GOT_TLSLD16_HA:
6658 tls_type = TLS_TLS | TLS_LD;
6659 goto dogot;
6660
6661 case R_PPC64_GOT_TLSGD16:
6662 case R_PPC64_GOT_TLSGD16_LO:
6663 case R_PPC64_GOT_TLSGD16_HI:
6664 case R_PPC64_GOT_TLSGD16_HA:
6665 tls_type = TLS_TLS | TLS_GD;
6666 goto dogot;
6667
6668 case R_PPC64_GOT_TPREL16_DS:
6669 case R_PPC64_GOT_TPREL16_LO_DS:
6670 case R_PPC64_GOT_TPREL16_HI:
6671 case R_PPC64_GOT_TPREL16_HA:
6672 tls_type = TLS_TLS | TLS_TPREL;
6673 goto dogot;
6674
6675 case R_PPC64_GOT_DTPREL16_DS:
6676 case R_PPC64_GOT_DTPREL16_LO_DS:
6677 case R_PPC64_GOT_DTPREL16_HI:
6678 case R_PPC64_GOT_DTPREL16_HA:
6679 tls_type = TLS_TLS | TLS_DTPREL;
6680 goto dogot;
6681
6682 case R_PPC64_GOT16:
6683 case R_PPC64_GOT16_DS:
6684 case R_PPC64_GOT16_HA:
6685 case R_PPC64_GOT16_HI:
6686 case R_PPC64_GOT16_LO:
6687 case R_PPC64_GOT16_LO_DS:
6688 dogot:
6689 {
6690 struct got_entry *ent;
6691
6692 if (h != NULL)
6693 ent = h->got.glist;
6694 else
6695 ent = local_got_ents[r_symndx];
6696
6697 for (; ent != NULL; ent = ent->next)
6698 if (ent->addend == rel->r_addend
6699 && ent->owner == abfd
6700 && ent->tls_type == tls_type)
6701 break;
6702 if (ent == NULL)
6703 abort ();
6704 if (ent->got.refcount > 0)
6705 ent->got.refcount -= 1;
6706 }
6707 if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1)
6708 plt_list = &h->plt.plist;
6709 break;
6710
6711 case R_PPC64_PLT16_HA:
6712 case R_PPC64_PLT16_HI:
6713 case R_PPC64_PLT16_LO:
6714 case R_PPC64_PLT32:
6715 case R_PPC64_PLT64:
6716 case R_PPC64_REL14:
6717 case R_PPC64_REL14_BRNTAKEN:
6718 case R_PPC64_REL14_BRTAKEN:
6719 case R_PPC64_REL24:
6720 if (h != NULL)
6721 plt_list = &h->plt.plist;
6722 else if (local_got_ents != NULL)
6723 {
6724 struct plt_entry **local_plt = (struct plt_entry **)
6725 (local_got_ents + symtab_hdr->sh_info);
6726 unsigned char *local_got_tls_masks = (unsigned char *)
6727 (local_plt + symtab_hdr->sh_info);
6728 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
6729 plt_list = local_plt + r_symndx;
6730 }
6731 break;
6732
6733 case R_PPC64_ADDR64:
6734 case R_PPC64_ADDR16:
6735 case R_PPC64_ADDR16_DS:
6736 case R_PPC64_ADDR16_HA:
6737 case R_PPC64_ADDR16_HI:
6738 case R_PPC64_ADDR16_HIGH:
6739 case R_PPC64_ADDR16_HIGHA:
6740 case R_PPC64_ADDR16_HIGHER:
6741 case R_PPC64_ADDR16_HIGHERA:
6742 case R_PPC64_ADDR16_HIGHEST:
6743 case R_PPC64_ADDR16_HIGHESTA:
6744 case R_PPC64_ADDR16_LO:
6745 case R_PPC64_ADDR16_LO_DS:
6746 if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1
6747 && rel->r_addend == 0)
6748 plt_list = &h->plt.plist;
6749 break;
6750
6751 default:
6752 break;
6753 }
6754 if (plt_list != NULL)
6755 {
6756 struct plt_entry *ent;
6757
6758 for (ent = *plt_list; ent != NULL; ent = ent->next)
6759 if (ent->addend == rel->r_addend)
6760 break;
6761 if (ent != NULL && ent->plt.refcount > 0)
6762 ent->plt.refcount -= 1;
6763 }
6764 }
6765 return TRUE;
6766 }
6767
6768 /* The maximum size of .sfpr. */
6769 #define SFPR_MAX (218*4)
6770
6771 struct sfpr_def_parms
6772 {
6773 const char name[12];
6774 unsigned char lo, hi;
6775 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
6776 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
6777 };
6778
6779 /* Auto-generate _save*, _rest* functions in .sfpr.
6780 If STUB_SEC is non-null, define alias symbols in STUB_SEC
6781 instead. */
6782
6783 static bfd_boolean
6784 sfpr_define (struct bfd_link_info *info,
6785 const struct sfpr_def_parms *parm,
6786 asection *stub_sec)
6787 {
6788 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6789 unsigned int i;
6790 size_t len = strlen (parm->name);
6791 bfd_boolean writing = FALSE;
6792 char sym[16];
6793
6794 if (htab == NULL)
6795 return FALSE;
6796
6797 memcpy (sym, parm->name, len);
6798 sym[len + 2] = 0;
6799
6800 for (i = parm->lo; i <= parm->hi; i++)
6801 {
6802 struct ppc_link_hash_entry *h;
6803
6804 sym[len + 0] = i / 10 + '0';
6805 sym[len + 1] = i % 10 + '0';
6806 h = (struct ppc_link_hash_entry *)
6807 elf_link_hash_lookup (&htab->elf, sym, writing, TRUE, TRUE);
6808 if (stub_sec != NULL)
6809 {
6810 if (h != NULL
6811 && h->elf.root.type == bfd_link_hash_defined
6812 && h->elf.root.u.def.section == htab->sfpr)
6813 {
6814 struct elf_link_hash_entry *s;
6815 char buf[32];
6816 sprintf (buf, "%08x.%s", stub_sec->id & 0xffffffff, sym);
6817 s = elf_link_hash_lookup (&htab->elf, buf, TRUE, TRUE, FALSE);
6818 if (s == NULL)
6819 return FALSE;
6820 if (s->root.type == bfd_link_hash_new
6821 || (s->root.type = bfd_link_hash_defined
6822 && s->root.u.def.section == stub_sec))
6823 {
6824 s->root.type = bfd_link_hash_defined;
6825 s->root.u.def.section = stub_sec;
6826 s->root.u.def.value = (stub_sec->size
6827 + h->elf.root.u.def.value);
6828 s->ref_regular = 1;
6829 s->def_regular = 1;
6830 s->ref_regular_nonweak = 1;
6831 s->forced_local = 1;
6832 s->non_elf = 0;
6833 s->root.linker_def = 1;
6834 }
6835 }
6836 continue;
6837 }
6838 if (h != NULL)
6839 {
6840 h->save_res = 1;
6841 if (!h->elf.def_regular)
6842 {
6843 h->elf.root.type = bfd_link_hash_defined;
6844 h->elf.root.u.def.section = htab->sfpr;
6845 h->elf.root.u.def.value = htab->sfpr->size;
6846 h->elf.type = STT_FUNC;
6847 h->elf.def_regular = 1;
6848 h->elf.non_elf = 0;
6849 _bfd_elf_link_hash_hide_symbol (info, &h->elf, TRUE);
6850 writing = TRUE;
6851 if (htab->sfpr->contents == NULL)
6852 {
6853 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
6854 if (htab->sfpr->contents == NULL)
6855 return FALSE;
6856 }
6857 }
6858 }
6859 if (writing)
6860 {
6861 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
6862 if (i != parm->hi)
6863 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
6864 else
6865 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
6866 htab->sfpr->size = p - htab->sfpr->contents;
6867 }
6868 }
6869
6870 return TRUE;
6871 }
6872
6873 static bfd_byte *
6874 savegpr0 (bfd *abfd, bfd_byte *p, int r)
6875 {
6876 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6877 return p + 4;
6878 }
6879
6880 static bfd_byte *
6881 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
6882 {
6883 p = savegpr0 (abfd, p, r);
6884 bfd_put_32 (abfd, STD_R0_0R1 + STK_LR, p);
6885 p = p + 4;
6886 bfd_put_32 (abfd, BLR, p);
6887 return p + 4;
6888 }
6889
6890 static bfd_byte *
6891 restgpr0 (bfd *abfd, bfd_byte *p, int r)
6892 {
6893 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6894 return p + 4;
6895 }
6896
6897 static bfd_byte *
6898 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
6899 {
6900 bfd_put_32 (abfd, LD_R0_0R1 + STK_LR, p);
6901 p = p + 4;
6902 p = restgpr0 (abfd, p, r);
6903 bfd_put_32 (abfd, MTLR_R0, p);
6904 p = p + 4;
6905 if (r == 29)
6906 {
6907 p = restgpr0 (abfd, p, 30);
6908 p = restgpr0 (abfd, p, 31);
6909 }
6910 bfd_put_32 (abfd, BLR, p);
6911 return p + 4;
6912 }
6913
6914 static bfd_byte *
6915 savegpr1 (bfd *abfd, bfd_byte *p, int r)
6916 {
6917 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6918 return p + 4;
6919 }
6920
6921 static bfd_byte *
6922 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
6923 {
6924 p = savegpr1 (abfd, p, r);
6925 bfd_put_32 (abfd, BLR, p);
6926 return p + 4;
6927 }
6928
6929 static bfd_byte *
6930 restgpr1 (bfd *abfd, bfd_byte *p, int r)
6931 {
6932 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6933 return p + 4;
6934 }
6935
6936 static bfd_byte *
6937 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
6938 {
6939 p = restgpr1 (abfd, p, r);
6940 bfd_put_32 (abfd, BLR, p);
6941 return p + 4;
6942 }
6943
6944 static bfd_byte *
6945 savefpr (bfd *abfd, bfd_byte *p, int r)
6946 {
6947 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6948 return p + 4;
6949 }
6950
6951 static bfd_byte *
6952 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
6953 {
6954 p = savefpr (abfd, p, r);
6955 bfd_put_32 (abfd, STD_R0_0R1 + STK_LR, p);
6956 p = p + 4;
6957 bfd_put_32 (abfd, BLR, p);
6958 return p + 4;
6959 }
6960
6961 static bfd_byte *
6962 restfpr (bfd *abfd, bfd_byte *p, int r)
6963 {
6964 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6965 return p + 4;
6966 }
6967
6968 static bfd_byte *
6969 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
6970 {
6971 bfd_put_32 (abfd, LD_R0_0R1 + STK_LR, p);
6972 p = p + 4;
6973 p = restfpr (abfd, p, r);
6974 bfd_put_32 (abfd, MTLR_R0, p);
6975 p = p + 4;
6976 if (r == 29)
6977 {
6978 p = restfpr (abfd, p, 30);
6979 p = restfpr (abfd, p, 31);
6980 }
6981 bfd_put_32 (abfd, BLR, p);
6982 return p + 4;
6983 }
6984
6985 static bfd_byte *
6986 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
6987 {
6988 p = savefpr (abfd, p, r);
6989 bfd_put_32 (abfd, BLR, p);
6990 return p + 4;
6991 }
6992
6993 static bfd_byte *
6994 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
6995 {
6996 p = restfpr (abfd, p, r);
6997 bfd_put_32 (abfd, BLR, p);
6998 return p + 4;
6999 }
7000
7001 static bfd_byte *
7002 savevr (bfd *abfd, bfd_byte *p, int r)
7003 {
7004 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
7005 p = p + 4;
7006 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
7007 return p + 4;
7008 }
7009
7010 static bfd_byte *
7011 savevr_tail (bfd *abfd, bfd_byte *p, int r)
7012 {
7013 p = savevr (abfd, p, r);
7014 bfd_put_32 (abfd, BLR, p);
7015 return p + 4;
7016 }
7017
7018 static bfd_byte *
7019 restvr (bfd *abfd, bfd_byte *p, int r)
7020 {
7021 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
7022 p = p + 4;
7023 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
7024 return p + 4;
7025 }
7026
7027 static bfd_byte *
7028 restvr_tail (bfd *abfd, bfd_byte *p, int r)
7029 {
7030 p = restvr (abfd, p, r);
7031 bfd_put_32 (abfd, BLR, p);
7032 return p + 4;
7033 }
7034
7035 /* Called via elf_link_hash_traverse to transfer dynamic linking
7036 information on function code symbol entries to their corresponding
7037 function descriptor symbol entries. */
7038
7039 static bfd_boolean
7040 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
7041 {
7042 struct bfd_link_info *info;
7043 struct ppc_link_hash_table *htab;
7044 struct ppc_link_hash_entry *fh;
7045 struct ppc_link_hash_entry *fdh;
7046 bfd_boolean force_local;
7047
7048 fh = (struct ppc_link_hash_entry *) h;
7049 if (fh->elf.root.type == bfd_link_hash_indirect)
7050 return TRUE;
7051
7052 if (!fh->is_func)
7053 return TRUE;
7054
7055 if (fh->elf.root.root.string[0] != '.'
7056 || fh->elf.root.root.string[1] == '\0')
7057 return TRUE;
7058
7059 info = inf;
7060 htab = ppc_hash_table (info);
7061 if (htab == NULL)
7062 return FALSE;
7063
7064 /* Find the corresponding function descriptor symbol. */
7065 fdh = lookup_fdh (fh, htab);
7066
7067 /* Resolve undefined references to dot-symbols as the value
7068 in the function descriptor, if we have one in a regular object.
7069 This is to satisfy cases like ".quad .foo". Calls to functions
7070 in dynamic objects are handled elsewhere. */
7071 if ((fh->elf.root.type == bfd_link_hash_undefined
7072 || fh->elf.root.type == bfd_link_hash_undefweak)
7073 && (fdh->elf.root.type == bfd_link_hash_defined
7074 || fdh->elf.root.type == bfd_link_hash_defweak)
7075 && get_opd_info (fdh->elf.root.u.def.section) != NULL
7076 && opd_entry_value (fdh->elf.root.u.def.section,
7077 fdh->elf.root.u.def.value,
7078 &fh->elf.root.u.def.section,
7079 &fh->elf.root.u.def.value, FALSE) != (bfd_vma) -1)
7080 {
7081 fh->elf.root.type = fdh->elf.root.type;
7082 fh->elf.forced_local = 1;
7083 fh->elf.def_regular = fdh->elf.def_regular;
7084 fh->elf.def_dynamic = fdh->elf.def_dynamic;
7085 }
7086
7087 if (!fh->elf.dynamic)
7088 {
7089 struct plt_entry *ent;
7090
7091 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
7092 if (ent->plt.refcount > 0)
7093 break;
7094 if (ent == NULL)
7095 return TRUE;
7096 }
7097
7098 /* Create a descriptor as undefined if necessary. */
7099 if (fdh == NULL
7100 && !bfd_link_executable (info)
7101 && (fh->elf.root.type == bfd_link_hash_undefined
7102 || fh->elf.root.type == bfd_link_hash_undefweak))
7103 {
7104 fdh = make_fdh (info, fh);
7105 if (fdh == NULL)
7106 return FALSE;
7107 }
7108
7109 /* We can't support overriding of symbols on a fake descriptor. */
7110 if (fdh != NULL
7111 && fdh->fake
7112 && (fh->elf.root.type == bfd_link_hash_defined
7113 || fh->elf.root.type == bfd_link_hash_defweak))
7114 _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE);
7115
7116 /* Transfer dynamic linking information to the function descriptor. */
7117 if (fdh != NULL)
7118 {
7119 fdh->elf.ref_regular |= fh->elf.ref_regular;
7120 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
7121 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
7122 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
7123 fdh->elf.dynamic |= fh->elf.dynamic;
7124 fdh->elf.needs_plt |= (fh->elf.needs_plt
7125 || fh->elf.type == STT_FUNC
7126 || fh->elf.type == STT_GNU_IFUNC);
7127 move_plt_plist (fh, fdh);
7128
7129 if (!fdh->elf.forced_local
7130 && fh->elf.dynindx != -1)
7131 if (!bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
7132 return FALSE;
7133 }
7134
7135 /* Now that the info is on the function descriptor, clear the
7136 function code sym info. Any function code syms for which we
7137 don't have a definition in a regular file, we force local.
7138 This prevents a shared library from exporting syms that have
7139 been imported from another library. Function code syms that
7140 are really in the library we must leave global to prevent the
7141 linker dragging in a definition from a static library. */
7142 force_local = (!fh->elf.def_regular
7143 || fdh == NULL
7144 || !fdh->elf.def_regular
7145 || fdh->elf.forced_local);
7146 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
7147
7148 return TRUE;
7149 }
7150
7151 static const struct sfpr_def_parms save_res_funcs[] =
7152 {
7153 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
7154 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
7155 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
7156 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
7157 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
7158 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
7159 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
7160 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
7161 { "._savef", 14, 31, savefpr, savefpr1_tail },
7162 { "._restf", 14, 31, restfpr, restfpr1_tail },
7163 { "_savevr_", 20, 31, savevr, savevr_tail },
7164 { "_restvr_", 20, 31, restvr, restvr_tail }
7165 };
7166
7167 /* Called near the start of bfd_elf_size_dynamic_sections. We use
7168 this hook to a) provide some gcc support functions, and b) transfer
7169 dynamic linking information gathered so far on function code symbol
7170 entries, to their corresponding function descriptor symbol entries. */
7171
7172 static bfd_boolean
7173 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
7174 struct bfd_link_info *info)
7175 {
7176 struct ppc_link_hash_table *htab;
7177
7178 htab = ppc_hash_table (info);
7179 if (htab == NULL)
7180 return FALSE;
7181
7182 /* Provide any missing _save* and _rest* functions. */
7183 if (htab->sfpr != NULL)
7184 {
7185 unsigned int i;
7186
7187 htab->sfpr->size = 0;
7188 for (i = 0; i < ARRAY_SIZE (save_res_funcs); i++)
7189 if (!sfpr_define (info, &save_res_funcs[i], NULL))
7190 return FALSE;
7191 if (htab->sfpr->size == 0)
7192 htab->sfpr->flags |= SEC_EXCLUDE;
7193 }
7194
7195 if (bfd_link_relocatable (info))
7196 return TRUE;
7197
7198 if (htab->elf.hgot != NULL)
7199 {
7200 _bfd_elf_link_hash_hide_symbol (info, htab->elf.hgot, TRUE);
7201 /* Make .TOC. defined so as to prevent it being made dynamic.
7202 The wrong value here is fixed later in ppc64_elf_set_toc. */
7203 if (!htab->elf.hgot->def_regular
7204 || htab->elf.hgot->root.type != bfd_link_hash_defined)
7205 {
7206 htab->elf.hgot->root.type = bfd_link_hash_defined;
7207 htab->elf.hgot->root.u.def.value = 0;
7208 htab->elf.hgot->root.u.def.section = bfd_abs_section_ptr;
7209 htab->elf.hgot->def_regular = 1;
7210 htab->elf.hgot->root.linker_def = 1;
7211 }
7212 htab->elf.hgot->type = STT_OBJECT;
7213 htab->elf.hgot->other = ((htab->elf.hgot->other & ~ELF_ST_VISIBILITY (-1))
7214 | STV_HIDDEN);
7215 }
7216
7217 if (htab->need_func_desc_adj)
7218 {
7219 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
7220 htab->need_func_desc_adj = 0;
7221 }
7222
7223 return TRUE;
7224 }
7225
7226 /* Return true if we have dynamic relocs against H that apply to
7227 read-only sections. */
7228
7229 static bfd_boolean
7230 readonly_dynrelocs (struct elf_link_hash_entry *h)
7231 {
7232 struct ppc_link_hash_entry *eh;
7233 struct elf_dyn_relocs *p;
7234
7235 eh = (struct ppc_link_hash_entry *) h;
7236 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7237 {
7238 asection *s = p->sec->output_section;
7239
7240 if (s != NULL && (s->flags & SEC_READONLY) != 0)
7241 return TRUE;
7242 }
7243 return FALSE;
7244 }
7245
7246 /* Return true if we have dynamic relocs against H or any of its weak
7247 aliases, that apply to read-only sections. */
7248
7249 static bfd_boolean
7250 alias_readonly_dynrelocs (struct elf_link_hash_entry *h)
7251 {
7252 struct ppc_link_hash_entry *eh;
7253
7254 eh = (struct ppc_link_hash_entry *) h;
7255 do
7256 {
7257 if (readonly_dynrelocs (&eh->elf))
7258 return TRUE;
7259 eh = eh->weakref;
7260 } while (eh != NULL && &eh->elf != h);
7261
7262 return FALSE;
7263 }
7264
7265 /* Return whether EH has pc-relative dynamic relocs. */
7266
7267 static bfd_boolean
7268 pc_dynrelocs (struct ppc_link_hash_entry *eh)
7269 {
7270 struct elf_dyn_relocs *p;
7271
7272 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7273 if (p->pc_count != 0)
7274 return TRUE;
7275 return FALSE;
7276 }
7277
7278 /* Return true if a global entry stub will be created for H. Valid
7279 for ELFv2 before plt entries have been allocated. */
7280
7281 static bfd_boolean
7282 global_entry_stub (struct elf_link_hash_entry *h)
7283 {
7284 struct plt_entry *pent;
7285
7286 if (!h->pointer_equality_needed
7287 || h->def_regular)
7288 return FALSE;
7289
7290 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
7291 if (pent->plt.refcount > 0
7292 && pent->addend == 0)
7293 return TRUE;
7294
7295 return FALSE;
7296 }
7297
7298 /* Adjust a symbol defined by a dynamic object and referenced by a
7299 regular object. The current definition is in some section of the
7300 dynamic object, but we're not including those sections. We have to
7301 change the definition to something the rest of the link can
7302 understand. */
7303
7304 static bfd_boolean
7305 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
7306 struct elf_link_hash_entry *h)
7307 {
7308 struct ppc_link_hash_table *htab;
7309 asection *s, *srel;
7310
7311 htab = ppc_hash_table (info);
7312 if (htab == NULL)
7313 return FALSE;
7314
7315 /* Deal with function syms. */
7316 if (h->type == STT_FUNC
7317 || h->type == STT_GNU_IFUNC
7318 || h->needs_plt)
7319 {
7320 /* Clear procedure linkage table information for any symbol that
7321 won't need a .plt entry. */
7322 struct plt_entry *ent;
7323 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
7324 if (ent->plt.refcount > 0)
7325 break;
7326 if (ent == NULL
7327 || (h->type != STT_GNU_IFUNC
7328 && (SYMBOL_CALLS_LOCAL (info, h)
7329 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)))
7330 || ((struct ppc_link_hash_entry *) h)->save_res)
7331 {
7332 h->plt.plist = NULL;
7333 h->needs_plt = 0;
7334 h->pointer_equality_needed = 0;
7335 }
7336 else if (abiversion (info->output_bfd) >= 2)
7337 {
7338 /* Taking a function's address in a read/write section
7339 doesn't require us to define the function symbol in the
7340 executable on a global entry stub. A dynamic reloc can
7341 be used instead. The reason we prefer a few more dynamic
7342 relocs is that calling via a global entry stub costs a
7343 few more instructions, and pointer_equality_needed causes
7344 extra work in ld.so when resolving these symbols. */
7345 if (global_entry_stub (h)
7346 && !alias_readonly_dynrelocs (h))
7347 {
7348 h->pointer_equality_needed = 0;
7349 /* After adjust_dynamic_symbol, non_got_ref set in
7350 the non-pic case means that dyn_relocs for this
7351 symbol should be discarded. */
7352 h->non_got_ref = 0;
7353 }
7354
7355 /* If making a plt entry, then we don't need copy relocs. */
7356 return TRUE;
7357 }
7358 }
7359 else
7360 h->plt.plist = NULL;
7361
7362 /* If this is a weak symbol, and there is a real definition, the
7363 processor independent code will have arranged for us to see the
7364 real definition first, and we can just use the same value. */
7365 if (h->u.weakdef != NULL)
7366 {
7367 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
7368 || h->u.weakdef->root.type == bfd_link_hash_defweak);
7369 h->root.u.def.section = h->u.weakdef->root.u.def.section;
7370 h->root.u.def.value = h->u.weakdef->root.u.def.value;
7371 if (ELIMINATE_COPY_RELOCS)
7372 h->non_got_ref = h->u.weakdef->non_got_ref;
7373 return TRUE;
7374 }
7375
7376 /* If we are creating a shared library, we must presume that the
7377 only references to the symbol are via the global offset table.
7378 For such cases we need not do anything here; the relocations will
7379 be handled correctly by relocate_section. */
7380 if (bfd_link_pic (info))
7381 return TRUE;
7382
7383 /* If there are no references to this symbol that do not use the
7384 GOT, we don't need to generate a copy reloc. */
7385 if (!h->non_got_ref)
7386 return TRUE;
7387
7388 /* Don't generate a copy reloc for symbols defined in the executable. */
7389 if (!h->def_dynamic || !h->ref_regular || h->def_regular
7390
7391 /* If -z nocopyreloc was given, don't generate them either. */
7392 || info->nocopyreloc
7393
7394 /* If we didn't find any dynamic relocs in read-only sections, then
7395 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
7396 || (ELIMINATE_COPY_RELOCS && !alias_readonly_dynrelocs (h))
7397
7398 /* Protected variables do not work with .dynbss. The copy in
7399 .dynbss won't be used by the shared library with the protected
7400 definition for the variable. Text relocations are preferable
7401 to an incorrect program. */
7402 || h->protected_def)
7403 {
7404 h->non_got_ref = 0;
7405 return TRUE;
7406 }
7407
7408 if (h->plt.plist != NULL)
7409 {
7410 /* We should never get here, but unfortunately there are versions
7411 of gcc out there that improperly (for this ABI) put initialized
7412 function pointers, vtable refs and suchlike in read-only
7413 sections. Allow them to proceed, but warn that this might
7414 break at runtime. */
7415 info->callbacks->einfo
7416 (_("%P: copy reloc against `%T' requires lazy plt linking; "
7417 "avoid setting LD_BIND_NOW=1 or upgrade gcc\n"),
7418 h->root.root.string);
7419 }
7420
7421 /* This is a reference to a symbol defined by a dynamic object which
7422 is not a function. */
7423
7424 /* We must allocate the symbol in our .dynbss section, which will
7425 become part of the .bss section of the executable. There will be
7426 an entry for this symbol in the .dynsym section. The dynamic
7427 object will contain position independent code, so all references
7428 from the dynamic object to this symbol will go through the global
7429 offset table. The dynamic linker will use the .dynsym entry to
7430 determine the address it must put in the global offset table, so
7431 both the dynamic object and the regular object will refer to the
7432 same memory location for the variable. */
7433
7434 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
7435 to copy the initial value out of the dynamic object and into the
7436 runtime process image. We need to remember the offset into the
7437 .rela.bss section we are going to use. */
7438 if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
7439 {
7440 s = htab->elf.sdynrelro;
7441 srel = htab->elf.sreldynrelro;
7442 }
7443 else
7444 {
7445 s = htab->elf.sdynbss;
7446 srel = htab->elf.srelbss;
7447 }
7448 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
7449 {
7450 srel->size += sizeof (Elf64_External_Rela);
7451 h->needs_copy = 1;
7452 }
7453
7454 return _bfd_elf_adjust_dynamic_copy (info, h, s);
7455 }
7456
7457 /* If given a function descriptor symbol, hide both the function code
7458 sym and the descriptor. */
7459 static void
7460 ppc64_elf_hide_symbol (struct bfd_link_info *info,
7461 struct elf_link_hash_entry *h,
7462 bfd_boolean force_local)
7463 {
7464 struct ppc_link_hash_entry *eh;
7465 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
7466
7467 eh = (struct ppc_link_hash_entry *) h;
7468 if (eh->is_func_descriptor)
7469 {
7470 struct ppc_link_hash_entry *fh = eh->oh;
7471
7472 if (fh == NULL)
7473 {
7474 const char *p, *q;
7475 struct elf_link_hash_table *htab = elf_hash_table (info);
7476 char save;
7477
7478 /* We aren't supposed to use alloca in BFD because on
7479 systems which do not have alloca the version in libiberty
7480 calls xmalloc, which might cause the program to crash
7481 when it runs out of memory. This function doesn't have a
7482 return status, so there's no way to gracefully return an
7483 error. So cheat. We know that string[-1] can be safely
7484 accessed; It's either a string in an ELF string table,
7485 or allocated in an objalloc structure. */
7486
7487 p = eh->elf.root.root.string - 1;
7488 save = *p;
7489 *(char *) p = '.';
7490 fh = (struct ppc_link_hash_entry *)
7491 elf_link_hash_lookup (htab, p, FALSE, FALSE, FALSE);
7492 *(char *) p = save;
7493
7494 /* Unfortunately, if it so happens that the string we were
7495 looking for was allocated immediately before this string,
7496 then we overwrote the string terminator. That's the only
7497 reason the lookup should fail. */
7498 if (fh == NULL)
7499 {
7500 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
7501 while (q >= eh->elf.root.root.string && *q == *p)
7502 --q, --p;
7503 if (q < eh->elf.root.root.string && *p == '.')
7504 fh = (struct ppc_link_hash_entry *)
7505 elf_link_hash_lookup (htab, p, FALSE, FALSE, FALSE);
7506 }
7507 if (fh != NULL)
7508 {
7509 eh->oh = fh;
7510 fh->oh = eh;
7511 }
7512 }
7513 if (fh != NULL)
7514 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
7515 }
7516 }
7517
7518 static bfd_boolean
7519 get_sym_h (struct elf_link_hash_entry **hp,
7520 Elf_Internal_Sym **symp,
7521 asection **symsecp,
7522 unsigned char **tls_maskp,
7523 Elf_Internal_Sym **locsymsp,
7524 unsigned long r_symndx,
7525 bfd *ibfd)
7526 {
7527 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
7528
7529 if (r_symndx >= symtab_hdr->sh_info)
7530 {
7531 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
7532 struct elf_link_hash_entry *h;
7533
7534 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
7535 h = elf_follow_link (h);
7536
7537 if (hp != NULL)
7538 *hp = h;
7539
7540 if (symp != NULL)
7541 *symp = NULL;
7542
7543 if (symsecp != NULL)
7544 {
7545 asection *symsec = NULL;
7546 if (h->root.type == bfd_link_hash_defined
7547 || h->root.type == bfd_link_hash_defweak)
7548 symsec = h->root.u.def.section;
7549 *symsecp = symsec;
7550 }
7551
7552 if (tls_maskp != NULL)
7553 {
7554 struct ppc_link_hash_entry *eh;
7555
7556 eh = (struct ppc_link_hash_entry *) h;
7557 *tls_maskp = &eh->tls_mask;
7558 }
7559 }
7560 else
7561 {
7562 Elf_Internal_Sym *sym;
7563 Elf_Internal_Sym *locsyms = *locsymsp;
7564
7565 if (locsyms == NULL)
7566 {
7567 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
7568 if (locsyms == NULL)
7569 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
7570 symtab_hdr->sh_info,
7571 0, NULL, NULL, NULL);
7572 if (locsyms == NULL)
7573 return FALSE;
7574 *locsymsp = locsyms;
7575 }
7576 sym = locsyms + r_symndx;
7577
7578 if (hp != NULL)
7579 *hp = NULL;
7580
7581 if (symp != NULL)
7582 *symp = sym;
7583
7584 if (symsecp != NULL)
7585 *symsecp = bfd_section_from_elf_index (ibfd, sym->st_shndx);
7586
7587 if (tls_maskp != NULL)
7588 {
7589 struct got_entry **lgot_ents;
7590 unsigned char *tls_mask;
7591
7592 tls_mask = NULL;
7593 lgot_ents = elf_local_got_ents (ibfd);
7594 if (lgot_ents != NULL)
7595 {
7596 struct plt_entry **local_plt = (struct plt_entry **)
7597 (lgot_ents + symtab_hdr->sh_info);
7598 unsigned char *lgot_masks = (unsigned char *)
7599 (local_plt + symtab_hdr->sh_info);
7600 tls_mask = &lgot_masks[r_symndx];
7601 }
7602 *tls_maskp = tls_mask;
7603 }
7604 }
7605 return TRUE;
7606 }
7607
7608 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
7609 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
7610 type suitable for optimization, and 1 otherwise. */
7611
7612 static int
7613 get_tls_mask (unsigned char **tls_maskp,
7614 unsigned long *toc_symndx,
7615 bfd_vma *toc_addend,
7616 Elf_Internal_Sym **locsymsp,
7617 const Elf_Internal_Rela *rel,
7618 bfd *ibfd)
7619 {
7620 unsigned long r_symndx;
7621 int next_r;
7622 struct elf_link_hash_entry *h;
7623 Elf_Internal_Sym *sym;
7624 asection *sec;
7625 bfd_vma off;
7626
7627 r_symndx = ELF64_R_SYM (rel->r_info);
7628 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
7629 return 0;
7630
7631 if ((*tls_maskp != NULL && **tls_maskp != 0)
7632 || sec == NULL
7633 || ppc64_elf_section_data (sec) == NULL
7634 || ppc64_elf_section_data (sec)->sec_type != sec_toc)
7635 return 1;
7636
7637 /* Look inside a TOC section too. */
7638 if (h != NULL)
7639 {
7640 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
7641 off = h->root.u.def.value;
7642 }
7643 else
7644 off = sym->st_value;
7645 off += rel->r_addend;
7646 BFD_ASSERT (off % 8 == 0);
7647 r_symndx = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8];
7648 next_r = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8 + 1];
7649 if (toc_symndx != NULL)
7650 *toc_symndx = r_symndx;
7651 if (toc_addend != NULL)
7652 *toc_addend = ppc64_elf_section_data (sec)->u.toc.add[off / 8];
7653 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
7654 return 0;
7655 if ((h == NULL || is_static_defined (h))
7656 && (next_r == -1 || next_r == -2))
7657 return 1 - next_r;
7658 return 1;
7659 }
7660
7661 /* Find (or create) an entry in the tocsave hash table. */
7662
7663 static struct tocsave_entry *
7664 tocsave_find (struct ppc_link_hash_table *htab,
7665 enum insert_option insert,
7666 Elf_Internal_Sym **local_syms,
7667 const Elf_Internal_Rela *irela,
7668 bfd *ibfd)
7669 {
7670 unsigned long r_indx;
7671 struct elf_link_hash_entry *h;
7672 Elf_Internal_Sym *sym;
7673 struct tocsave_entry ent, *p;
7674 hashval_t hash;
7675 struct tocsave_entry **slot;
7676
7677 r_indx = ELF64_R_SYM (irela->r_info);
7678 if (!get_sym_h (&h, &sym, &ent.sec, NULL, local_syms, r_indx, ibfd))
7679 return NULL;
7680 if (ent.sec == NULL || ent.sec->output_section == NULL)
7681 {
7682 _bfd_error_handler
7683 (_("%B: undefined symbol on R_PPC64_TOCSAVE relocation"), ibfd);
7684 return NULL;
7685 }
7686
7687 if (h != NULL)
7688 ent.offset = h->root.u.def.value;
7689 else
7690 ent.offset = sym->st_value;
7691 ent.offset += irela->r_addend;
7692
7693 hash = tocsave_htab_hash (&ent);
7694 slot = ((struct tocsave_entry **)
7695 htab_find_slot_with_hash (htab->tocsave_htab, &ent, hash, insert));
7696 if (slot == NULL)
7697 return NULL;
7698
7699 if (*slot == NULL)
7700 {
7701 p = (struct tocsave_entry *) bfd_alloc (ibfd, sizeof (*p));
7702 if (p == NULL)
7703 return NULL;
7704 *p = ent;
7705 *slot = p;
7706 }
7707 return *slot;
7708 }
7709
7710 /* Adjust all global syms defined in opd sections. In gcc generated
7711 code for the old ABI, these will already have been done. */
7712
7713 static bfd_boolean
7714 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
7715 {
7716 struct ppc_link_hash_entry *eh;
7717 asection *sym_sec;
7718 struct _opd_sec_data *opd;
7719
7720 if (h->root.type == bfd_link_hash_indirect)
7721 return TRUE;
7722
7723 if (h->root.type != bfd_link_hash_defined
7724 && h->root.type != bfd_link_hash_defweak)
7725 return TRUE;
7726
7727 eh = (struct ppc_link_hash_entry *) h;
7728 if (eh->adjust_done)
7729 return TRUE;
7730
7731 sym_sec = eh->elf.root.u.def.section;
7732 opd = get_opd_info (sym_sec);
7733 if (opd != NULL && opd->adjust != NULL)
7734 {
7735 long adjust = opd->adjust[OPD_NDX (eh->elf.root.u.def.value)];
7736 if (adjust == -1)
7737 {
7738 /* This entry has been deleted. */
7739 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
7740 if (dsec == NULL)
7741 {
7742 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
7743 if (discarded_section (dsec))
7744 {
7745 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
7746 break;
7747 }
7748 }
7749 eh->elf.root.u.def.value = 0;
7750 eh->elf.root.u.def.section = dsec;
7751 }
7752 else
7753 eh->elf.root.u.def.value += adjust;
7754 eh->adjust_done = 1;
7755 }
7756 return TRUE;
7757 }
7758
7759 /* Handles decrementing dynamic reloc counts for the reloc specified by
7760 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM
7761 have already been determined. */
7762
7763 static bfd_boolean
7764 dec_dynrel_count (bfd_vma r_info,
7765 asection *sec,
7766 struct bfd_link_info *info,
7767 Elf_Internal_Sym **local_syms,
7768 struct elf_link_hash_entry *h,
7769 Elf_Internal_Sym *sym)
7770 {
7771 enum elf_ppc64_reloc_type r_type;
7772 asection *sym_sec = NULL;
7773
7774 /* Can this reloc be dynamic? This switch, and later tests here
7775 should be kept in sync with the code in check_relocs. */
7776 r_type = ELF64_R_TYPE (r_info);
7777 switch (r_type)
7778 {
7779 default:
7780 return TRUE;
7781
7782 case R_PPC64_TPREL16:
7783 case R_PPC64_TPREL16_LO:
7784 case R_PPC64_TPREL16_HI:
7785 case R_PPC64_TPREL16_HA:
7786 case R_PPC64_TPREL16_DS:
7787 case R_PPC64_TPREL16_LO_DS:
7788 case R_PPC64_TPREL16_HIGH:
7789 case R_PPC64_TPREL16_HIGHA:
7790 case R_PPC64_TPREL16_HIGHER:
7791 case R_PPC64_TPREL16_HIGHERA:
7792 case R_PPC64_TPREL16_HIGHEST:
7793 case R_PPC64_TPREL16_HIGHESTA:
7794 if (!bfd_link_pic (info))
7795 return TRUE;
7796
7797 case R_PPC64_TPREL64:
7798 case R_PPC64_DTPMOD64:
7799 case R_PPC64_DTPREL64:
7800 case R_PPC64_ADDR64:
7801 case R_PPC64_REL30:
7802 case R_PPC64_REL32:
7803 case R_PPC64_REL64:
7804 case R_PPC64_ADDR14:
7805 case R_PPC64_ADDR14_BRNTAKEN:
7806 case R_PPC64_ADDR14_BRTAKEN:
7807 case R_PPC64_ADDR16:
7808 case R_PPC64_ADDR16_DS:
7809 case R_PPC64_ADDR16_HA:
7810 case R_PPC64_ADDR16_HI:
7811 case R_PPC64_ADDR16_HIGH:
7812 case R_PPC64_ADDR16_HIGHA:
7813 case R_PPC64_ADDR16_HIGHER:
7814 case R_PPC64_ADDR16_HIGHERA:
7815 case R_PPC64_ADDR16_HIGHEST:
7816 case R_PPC64_ADDR16_HIGHESTA:
7817 case R_PPC64_ADDR16_LO:
7818 case R_PPC64_ADDR16_LO_DS:
7819 case R_PPC64_ADDR24:
7820 case R_PPC64_ADDR32:
7821 case R_PPC64_UADDR16:
7822 case R_PPC64_UADDR32:
7823 case R_PPC64_UADDR64:
7824 case R_PPC64_TOC:
7825 break;
7826 }
7827
7828 if (local_syms != NULL)
7829 {
7830 unsigned long r_symndx;
7831 bfd *ibfd = sec->owner;
7832
7833 r_symndx = ELF64_R_SYM (r_info);
7834 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
7835 return FALSE;
7836 }
7837
7838 if ((bfd_link_pic (info)
7839 && (must_be_dyn_reloc (info, r_type)
7840 || (h != NULL
7841 && (!SYMBOLIC_BIND (info, h)
7842 || h->root.type == bfd_link_hash_defweak
7843 || !h->def_regular))))
7844 || (ELIMINATE_COPY_RELOCS
7845 && !bfd_link_pic (info)
7846 && h != NULL
7847 && (h->root.type == bfd_link_hash_defweak
7848 || !h->def_regular)))
7849 ;
7850 else
7851 return TRUE;
7852
7853 if (h != NULL)
7854 {
7855 struct elf_dyn_relocs *p;
7856 struct elf_dyn_relocs **pp;
7857 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
7858
7859 /* elf_gc_sweep may have already removed all dyn relocs associated
7860 with local syms for a given section. Also, symbol flags are
7861 changed by elf_gc_sweep_symbol, confusing the test above. Don't
7862 report a dynreloc miscount. */
7863 if (*pp == NULL && info->gc_sections)
7864 return TRUE;
7865
7866 while ((p = *pp) != NULL)
7867 {
7868 if (p->sec == sec)
7869 {
7870 if (!must_be_dyn_reloc (info, r_type))
7871 p->pc_count -= 1;
7872 p->count -= 1;
7873 if (p->count == 0)
7874 *pp = p->next;
7875 return TRUE;
7876 }
7877 pp = &p->next;
7878 }
7879 }
7880 else
7881 {
7882 struct ppc_dyn_relocs *p;
7883 struct ppc_dyn_relocs **pp;
7884 void *vpp;
7885 bfd_boolean is_ifunc;
7886
7887 if (local_syms == NULL)
7888 sym_sec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
7889 if (sym_sec == NULL)
7890 sym_sec = sec;
7891
7892 vpp = &elf_section_data (sym_sec)->local_dynrel;
7893 pp = (struct ppc_dyn_relocs **) vpp;
7894
7895 if (*pp == NULL && info->gc_sections)
7896 return TRUE;
7897
7898 is_ifunc = ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC;
7899 while ((p = *pp) != NULL)
7900 {
7901 if (p->sec == sec && p->ifunc == is_ifunc)
7902 {
7903 p->count -= 1;
7904 if (p->count == 0)
7905 *pp = p->next;
7906 return TRUE;
7907 }
7908 pp = &p->next;
7909 }
7910 }
7911
7912 /* xgettext:c-format */
7913 info->callbacks->einfo (_("%P: dynreloc miscount for %B, section %A\n"),
7914 sec->owner, sec);
7915 bfd_set_error (bfd_error_bad_value);
7916 return FALSE;
7917 }
7918
7919 /* Remove unused Official Procedure Descriptor entries. Currently we
7920 only remove those associated with functions in discarded link-once
7921 sections, or weakly defined functions that have been overridden. It
7922 would be possible to remove many more entries for statically linked
7923 applications. */
7924
7925 bfd_boolean
7926 ppc64_elf_edit_opd (struct bfd_link_info *info)
7927 {
7928 bfd *ibfd;
7929 bfd_boolean some_edited = FALSE;
7930 asection *need_pad = NULL;
7931 struct ppc_link_hash_table *htab;
7932
7933 htab = ppc_hash_table (info);
7934 if (htab == NULL)
7935 return FALSE;
7936
7937 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
7938 {
7939 asection *sec;
7940 Elf_Internal_Rela *relstart, *rel, *relend;
7941 Elf_Internal_Shdr *symtab_hdr;
7942 Elf_Internal_Sym *local_syms;
7943 struct _opd_sec_data *opd;
7944 bfd_boolean need_edit, add_aux_fields, broken;
7945 bfd_size_type cnt_16b = 0;
7946
7947 if (!is_ppc64_elf (ibfd))
7948 continue;
7949
7950 sec = bfd_get_section_by_name (ibfd, ".opd");
7951 if (sec == NULL || sec->size == 0)
7952 continue;
7953
7954 if (sec->sec_info_type == SEC_INFO_TYPE_JUST_SYMS)
7955 continue;
7956
7957 if (sec->output_section == bfd_abs_section_ptr)
7958 continue;
7959
7960 /* Look through the section relocs. */
7961 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
7962 continue;
7963
7964 local_syms = NULL;
7965 symtab_hdr = &elf_symtab_hdr (ibfd);
7966
7967 /* Read the relocations. */
7968 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7969 info->keep_memory);
7970 if (relstart == NULL)
7971 return FALSE;
7972
7973 /* First run through the relocs to check they are sane, and to
7974 determine whether we need to edit this opd section. */
7975 need_edit = FALSE;
7976 broken = FALSE;
7977 need_pad = sec;
7978 relend = relstart + sec->reloc_count;
7979 for (rel = relstart; rel < relend; )
7980 {
7981 enum elf_ppc64_reloc_type r_type;
7982 unsigned long r_symndx;
7983 asection *sym_sec;
7984 struct elf_link_hash_entry *h;
7985 Elf_Internal_Sym *sym;
7986 bfd_vma offset;
7987
7988 /* .opd contains an array of 16 or 24 byte entries. We're
7989 only interested in the reloc pointing to a function entry
7990 point. */
7991 offset = rel->r_offset;
7992 if (rel + 1 == relend
7993 || rel[1].r_offset != offset + 8)
7994 {
7995 /* If someone messes with .opd alignment then after a
7996 "ld -r" we might have padding in the middle of .opd.
7997 Also, there's nothing to prevent someone putting
7998 something silly in .opd with the assembler. No .opd
7999 optimization for them! */
8000 broken_opd:
8001 _bfd_error_handler
8002 (_("%B: .opd is not a regular array of opd entries"), ibfd);
8003 broken = TRUE;
8004 break;
8005 }
8006
8007 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
8008 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
8009 {
8010 _bfd_error_handler
8011 /* xgettext:c-format */
8012 (_("%B: unexpected reloc type %u in .opd section"),
8013 ibfd, r_type);
8014 broken = TRUE;
8015 break;
8016 }
8017
8018 r_symndx = ELF64_R_SYM (rel->r_info);
8019 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8020 r_symndx, ibfd))
8021 goto error_ret;
8022
8023 if (sym_sec == NULL || sym_sec->owner == NULL)
8024 {
8025 const char *sym_name;
8026 if (h != NULL)
8027 sym_name = h->root.root.string;
8028 else
8029 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
8030 sym_sec);
8031
8032 _bfd_error_handler
8033 /* xgettext:c-format */
8034 (_("%B: undefined sym `%s' in .opd section"),
8035 ibfd, sym_name);
8036 broken = TRUE;
8037 break;
8038 }
8039
8040 /* opd entries are always for functions defined in the
8041 current input bfd. If the symbol isn't defined in the
8042 input bfd, then we won't be using the function in this
8043 bfd; It must be defined in a linkonce section in another
8044 bfd, or is weak. It's also possible that we are
8045 discarding the function due to a linker script /DISCARD/,
8046 which we test for via the output_section. */
8047 if (sym_sec->owner != ibfd
8048 || sym_sec->output_section == bfd_abs_section_ptr)
8049 need_edit = TRUE;
8050
8051 rel += 2;
8052 if (rel + 1 == relend
8053 || (rel + 2 < relend
8054 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC))
8055 ++rel;
8056
8057 if (rel == relend)
8058 {
8059 if (sec->size == offset + 24)
8060 {
8061 need_pad = NULL;
8062 break;
8063 }
8064 if (sec->size == offset + 16)
8065 {
8066 cnt_16b++;
8067 break;
8068 }
8069 goto broken_opd;
8070 }
8071 else if (rel + 1 < relend
8072 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
8073 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
8074 {
8075 if (rel[0].r_offset == offset + 16)
8076 cnt_16b++;
8077 else if (rel[0].r_offset != offset + 24)
8078 goto broken_opd;
8079 }
8080 else
8081 goto broken_opd;
8082 }
8083
8084 add_aux_fields = htab->params->non_overlapping_opd && cnt_16b > 0;
8085
8086 if (!broken && (need_edit || add_aux_fields))
8087 {
8088 Elf_Internal_Rela *write_rel;
8089 Elf_Internal_Shdr *rel_hdr;
8090 bfd_byte *rptr, *wptr;
8091 bfd_byte *new_contents;
8092 bfd_size_type amt;
8093
8094 new_contents = NULL;
8095 amt = OPD_NDX (sec->size) * sizeof (long);
8096 opd = &ppc64_elf_section_data (sec)->u.opd;
8097 opd->adjust = bfd_zalloc (sec->owner, amt);
8098 if (opd->adjust == NULL)
8099 return FALSE;
8100 ppc64_elf_section_data (sec)->sec_type = sec_opd;
8101
8102 /* This seems a waste of time as input .opd sections are all
8103 zeros as generated by gcc, but I suppose there's no reason
8104 this will always be so. We might start putting something in
8105 the third word of .opd entries. */
8106 if ((sec->flags & SEC_IN_MEMORY) == 0)
8107 {
8108 bfd_byte *loc;
8109 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
8110 {
8111 if (loc != NULL)
8112 free (loc);
8113 error_ret:
8114 if (local_syms != NULL
8115 && symtab_hdr->contents != (unsigned char *) local_syms)
8116 free (local_syms);
8117 if (elf_section_data (sec)->relocs != relstart)
8118 free (relstart);
8119 return FALSE;
8120 }
8121 sec->contents = loc;
8122 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
8123 }
8124
8125 elf_section_data (sec)->relocs = relstart;
8126
8127 new_contents = sec->contents;
8128 if (add_aux_fields)
8129 {
8130 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
8131 if (new_contents == NULL)
8132 return FALSE;
8133 need_pad = NULL;
8134 }
8135 wptr = new_contents;
8136 rptr = sec->contents;
8137 write_rel = relstart;
8138 for (rel = relstart; rel < relend; )
8139 {
8140 unsigned long r_symndx;
8141 asection *sym_sec;
8142 struct elf_link_hash_entry *h;
8143 struct ppc_link_hash_entry *fdh = NULL;
8144 Elf_Internal_Sym *sym;
8145 long opd_ent_size;
8146 Elf_Internal_Rela *next_rel;
8147 bfd_boolean skip;
8148
8149 r_symndx = ELF64_R_SYM (rel->r_info);
8150 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8151 r_symndx, ibfd))
8152 goto error_ret;
8153
8154 next_rel = rel + 2;
8155 if (next_rel + 1 == relend
8156 || (next_rel + 2 < relend
8157 && ELF64_R_TYPE (next_rel[2].r_info) == R_PPC64_TOC))
8158 ++next_rel;
8159
8160 /* See if the .opd entry is full 24 byte or
8161 16 byte (with fd_aux entry overlapped with next
8162 fd_func). */
8163 opd_ent_size = 24;
8164 if (next_rel == relend)
8165 {
8166 if (sec->size == rel->r_offset + 16)
8167 opd_ent_size = 16;
8168 }
8169 else if (next_rel->r_offset == rel->r_offset + 16)
8170 opd_ent_size = 16;
8171
8172 if (h != NULL
8173 && h->root.root.string[0] == '.')
8174 {
8175 fdh = ((struct ppc_link_hash_entry *) h)->oh;
8176 if (fdh != NULL)
8177 {
8178 fdh = ppc_follow_link (fdh);
8179 if (fdh->elf.root.type != bfd_link_hash_defined
8180 && fdh->elf.root.type != bfd_link_hash_defweak)
8181 fdh = NULL;
8182 }
8183 }
8184
8185 skip = (sym_sec->owner != ibfd
8186 || sym_sec->output_section == bfd_abs_section_ptr);
8187 if (skip)
8188 {
8189 if (fdh != NULL && sym_sec->owner == ibfd)
8190 {
8191 /* Arrange for the function descriptor sym
8192 to be dropped. */
8193 fdh->elf.root.u.def.value = 0;
8194 fdh->elf.root.u.def.section = sym_sec;
8195 }
8196 opd->adjust[OPD_NDX (rel->r_offset)] = -1;
8197
8198 if (NO_OPD_RELOCS || bfd_link_relocatable (info))
8199 rel = next_rel;
8200 else
8201 while (1)
8202 {
8203 if (!dec_dynrel_count (rel->r_info, sec, info,
8204 NULL, h, sym))
8205 goto error_ret;
8206
8207 if (++rel == next_rel)
8208 break;
8209
8210 r_symndx = ELF64_R_SYM (rel->r_info);
8211 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8212 r_symndx, ibfd))
8213 goto error_ret;
8214 }
8215 }
8216 else
8217 {
8218 /* We'll be keeping this opd entry. */
8219 long adjust;
8220
8221 if (fdh != NULL)
8222 {
8223 /* Redefine the function descriptor symbol to
8224 this location in the opd section. It is
8225 necessary to update the value here rather
8226 than using an array of adjustments as we do
8227 for local symbols, because various places
8228 in the generic ELF code use the value
8229 stored in u.def.value. */
8230 fdh->elf.root.u.def.value = wptr - new_contents;
8231 fdh->adjust_done = 1;
8232 }
8233
8234 /* Local syms are a bit tricky. We could
8235 tweak them as they can be cached, but
8236 we'd need to look through the local syms
8237 for the function descriptor sym which we
8238 don't have at the moment. So keep an
8239 array of adjustments. */
8240 adjust = (wptr - new_contents) - (rptr - sec->contents);
8241 opd->adjust[OPD_NDX (rel->r_offset)] = adjust;
8242
8243 if (wptr != rptr)
8244 memcpy (wptr, rptr, opd_ent_size);
8245 wptr += opd_ent_size;
8246 if (add_aux_fields && opd_ent_size == 16)
8247 {
8248 memset (wptr, '\0', 8);
8249 wptr += 8;
8250 }
8251
8252 /* We need to adjust any reloc offsets to point to the
8253 new opd entries. */
8254 for ( ; rel != next_rel; ++rel)
8255 {
8256 rel->r_offset += adjust;
8257 if (write_rel != rel)
8258 memcpy (write_rel, rel, sizeof (*rel));
8259 ++write_rel;
8260 }
8261 }
8262
8263 rptr += opd_ent_size;
8264 }
8265
8266 sec->size = wptr - new_contents;
8267 sec->reloc_count = write_rel - relstart;
8268 if (add_aux_fields)
8269 {
8270 free (sec->contents);
8271 sec->contents = new_contents;
8272 }
8273
8274 /* Fudge the header size too, as this is used later in
8275 elf_bfd_final_link if we are emitting relocs. */
8276 rel_hdr = _bfd_elf_single_rel_hdr (sec);
8277 rel_hdr->sh_size = sec->reloc_count * rel_hdr->sh_entsize;
8278 some_edited = TRUE;
8279 }
8280 else if (elf_section_data (sec)->relocs != relstart)
8281 free (relstart);
8282
8283 if (local_syms != NULL
8284 && symtab_hdr->contents != (unsigned char *) local_syms)
8285 {
8286 if (!info->keep_memory)
8287 free (local_syms);
8288 else
8289 symtab_hdr->contents = (unsigned char *) local_syms;
8290 }
8291 }
8292
8293 if (some_edited)
8294 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
8295
8296 /* If we are doing a final link and the last .opd entry is just 16 byte
8297 long, add a 8 byte padding after it. */
8298 if (need_pad != NULL && !bfd_link_relocatable (info))
8299 {
8300 bfd_byte *p;
8301
8302 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
8303 {
8304 BFD_ASSERT (need_pad->size > 0);
8305
8306 p = bfd_malloc (need_pad->size + 8);
8307 if (p == NULL)
8308 return FALSE;
8309
8310 if (! bfd_get_section_contents (need_pad->owner, need_pad,
8311 p, 0, need_pad->size))
8312 return FALSE;
8313
8314 need_pad->contents = p;
8315 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
8316 }
8317 else
8318 {
8319 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
8320 if (p == NULL)
8321 return FALSE;
8322
8323 need_pad->contents = p;
8324 }
8325
8326 memset (need_pad->contents + need_pad->size, 0, 8);
8327 need_pad->size += 8;
8328 }
8329
8330 return TRUE;
8331 }
8332
8333 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
8334
8335 asection *
8336 ppc64_elf_tls_setup (struct bfd_link_info *info)
8337 {
8338 struct ppc_link_hash_table *htab;
8339
8340 htab = ppc_hash_table (info);
8341 if (htab == NULL)
8342 return NULL;
8343
8344 if (abiversion (info->output_bfd) == 1)
8345 htab->opd_abi = 1;
8346
8347 if (htab->params->no_multi_toc)
8348 htab->do_multi_toc = 0;
8349 else if (!htab->do_multi_toc)
8350 htab->params->no_multi_toc = 1;
8351
8352 if (htab->params->plt_localentry0 < 0)
8353 htab->params->plt_localentry0
8354 = elf_link_hash_lookup (&htab->elf, "GLIBC_2.26",
8355 FALSE, FALSE, FALSE) != NULL;
8356
8357 htab->tls_get_addr = ((struct ppc_link_hash_entry *)
8358 elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
8359 FALSE, FALSE, TRUE));
8360 /* Move dynamic linking info to the function descriptor sym. */
8361 if (htab->tls_get_addr != NULL)
8362 func_desc_adjust (&htab->tls_get_addr->elf, info);
8363 htab->tls_get_addr_fd = ((struct ppc_link_hash_entry *)
8364 elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
8365 FALSE, FALSE, TRUE));
8366 if (htab->params->tls_get_addr_opt)
8367 {
8368 struct elf_link_hash_entry *opt, *opt_fd, *tga, *tga_fd;
8369
8370 opt = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr_opt",
8371 FALSE, FALSE, TRUE);
8372 if (opt != NULL)
8373 func_desc_adjust (opt, info);
8374 opt_fd = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
8375 FALSE, FALSE, TRUE);
8376 if (opt_fd != NULL
8377 && (opt_fd->root.type == bfd_link_hash_defined
8378 || opt_fd->root.type == bfd_link_hash_defweak))
8379 {
8380 /* If glibc supports an optimized __tls_get_addr call stub,
8381 signalled by the presence of __tls_get_addr_opt, and we'll
8382 be calling __tls_get_addr via a plt call stub, then
8383 make __tls_get_addr point to __tls_get_addr_opt. */
8384 tga_fd = &htab->tls_get_addr_fd->elf;
8385 if (htab->elf.dynamic_sections_created
8386 && tga_fd != NULL
8387 && (tga_fd->type == STT_FUNC
8388 || tga_fd->needs_plt)
8389 && !(SYMBOL_CALLS_LOCAL (info, tga_fd)
8390 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, tga_fd)))
8391 {
8392 struct plt_entry *ent;
8393
8394 for (ent = tga_fd->plt.plist; ent != NULL; ent = ent->next)
8395 if (ent->plt.refcount > 0)
8396 break;
8397 if (ent != NULL)
8398 {
8399 tga_fd->root.type = bfd_link_hash_indirect;
8400 tga_fd->root.u.i.link = &opt_fd->root;
8401 ppc64_elf_copy_indirect_symbol (info, opt_fd, tga_fd);
8402 opt_fd->mark = 1;
8403 if (opt_fd->dynindx != -1)
8404 {
8405 /* Use __tls_get_addr_opt in dynamic relocations. */
8406 opt_fd->dynindx = -1;
8407 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
8408 opt_fd->dynstr_index);
8409 if (!bfd_elf_link_record_dynamic_symbol (info, opt_fd))
8410 return NULL;
8411 }
8412 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) opt_fd;
8413 tga = &htab->tls_get_addr->elf;
8414 if (opt != NULL && tga != NULL)
8415 {
8416 tga->root.type = bfd_link_hash_indirect;
8417 tga->root.u.i.link = &opt->root;
8418 ppc64_elf_copy_indirect_symbol (info, opt, tga);
8419 opt->mark = 1;
8420 _bfd_elf_link_hash_hide_symbol (info, opt,
8421 tga->forced_local);
8422 htab->tls_get_addr = (struct ppc_link_hash_entry *) opt;
8423 }
8424 htab->tls_get_addr_fd->oh = htab->tls_get_addr;
8425 htab->tls_get_addr_fd->is_func_descriptor = 1;
8426 if (htab->tls_get_addr != NULL)
8427 {
8428 htab->tls_get_addr->oh = htab->tls_get_addr_fd;
8429 htab->tls_get_addr->is_func = 1;
8430 }
8431 }
8432 }
8433 }
8434 else if (htab->params->tls_get_addr_opt < 0)
8435 htab->params->tls_get_addr_opt = 0;
8436 }
8437 return _bfd_elf_tls_setup (info->output_bfd, info);
8438 }
8439
8440 /* Return TRUE iff REL is a branch reloc with a global symbol matching
8441 HASH1 or HASH2. */
8442
8443 static bfd_boolean
8444 branch_reloc_hash_match (const bfd *ibfd,
8445 const Elf_Internal_Rela *rel,
8446 const struct ppc_link_hash_entry *hash1,
8447 const struct ppc_link_hash_entry *hash2)
8448 {
8449 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
8450 enum elf_ppc64_reloc_type r_type = ELF64_R_TYPE (rel->r_info);
8451 unsigned int r_symndx = ELF64_R_SYM (rel->r_info);
8452
8453 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
8454 {
8455 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
8456 struct elf_link_hash_entry *h;
8457
8458 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
8459 h = elf_follow_link (h);
8460 if (h == &hash1->elf || h == &hash2->elf)
8461 return TRUE;
8462 }
8463 return FALSE;
8464 }
8465
8466 /* Run through all the TLS relocs looking for optimization
8467 opportunities. The linker has been hacked (see ppc64elf.em) to do
8468 a preliminary section layout so that we know the TLS segment
8469 offsets. We can't optimize earlier because some optimizations need
8470 to know the tp offset, and we need to optimize before allocating
8471 dynamic relocations. */
8472
8473 bfd_boolean
8474 ppc64_elf_tls_optimize (struct bfd_link_info *info)
8475 {
8476 bfd *ibfd;
8477 asection *sec;
8478 struct ppc_link_hash_table *htab;
8479 unsigned char *toc_ref;
8480 int pass;
8481
8482 if (!bfd_link_executable (info))
8483 return TRUE;
8484
8485 htab = ppc_hash_table (info);
8486 if (htab == NULL)
8487 return FALSE;
8488
8489 /* Make two passes over the relocs. On the first pass, mark toc
8490 entries involved with tls relocs, and check that tls relocs
8491 involved in setting up a tls_get_addr call are indeed followed by
8492 such a call. If they are not, we can't do any tls optimization.
8493 On the second pass twiddle tls_mask flags to notify
8494 relocate_section that optimization can be done, and adjust got
8495 and plt refcounts. */
8496 toc_ref = NULL;
8497 for (pass = 0; pass < 2; ++pass)
8498 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
8499 {
8500 Elf_Internal_Sym *locsyms = NULL;
8501 asection *toc = bfd_get_section_by_name (ibfd, ".toc");
8502
8503 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8504 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
8505 {
8506 Elf_Internal_Rela *relstart, *rel, *relend;
8507 bfd_boolean found_tls_get_addr_arg = 0;
8508
8509 /* Read the relocations. */
8510 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8511 info->keep_memory);
8512 if (relstart == NULL)
8513 {
8514 free (toc_ref);
8515 return FALSE;
8516 }
8517
8518 relend = relstart + sec->reloc_count;
8519 for (rel = relstart; rel < relend; rel++)
8520 {
8521 enum elf_ppc64_reloc_type r_type;
8522 unsigned long r_symndx;
8523 struct elf_link_hash_entry *h;
8524 Elf_Internal_Sym *sym;
8525 asection *sym_sec;
8526 unsigned char *tls_mask;
8527 unsigned char tls_set, tls_clear, tls_type = 0;
8528 bfd_vma value;
8529 bfd_boolean ok_tprel, is_local;
8530 long toc_ref_index = 0;
8531 int expecting_tls_get_addr = 0;
8532 bfd_boolean ret = FALSE;
8533
8534 r_symndx = ELF64_R_SYM (rel->r_info);
8535 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
8536 r_symndx, ibfd))
8537 {
8538 err_free_rel:
8539 if (elf_section_data (sec)->relocs != relstart)
8540 free (relstart);
8541 if (toc_ref != NULL)
8542 free (toc_ref);
8543 if (locsyms != NULL
8544 && (elf_symtab_hdr (ibfd).contents
8545 != (unsigned char *) locsyms))
8546 free (locsyms);
8547 return ret;
8548 }
8549
8550 if (h != NULL)
8551 {
8552 if (h->root.type == bfd_link_hash_defined
8553 || h->root.type == bfd_link_hash_defweak)
8554 value = h->root.u.def.value;
8555 else if (h->root.type == bfd_link_hash_undefweak)
8556 value = 0;
8557 else
8558 {
8559 found_tls_get_addr_arg = 0;
8560 continue;
8561 }
8562 }
8563 else
8564 /* Symbols referenced by TLS relocs must be of type
8565 STT_TLS. So no need for .opd local sym adjust. */
8566 value = sym->st_value;
8567
8568 ok_tprel = FALSE;
8569 is_local = FALSE;
8570 if (h == NULL
8571 || !h->def_dynamic)
8572 {
8573 is_local = TRUE;
8574 if (h != NULL
8575 && h->root.type == bfd_link_hash_undefweak)
8576 ok_tprel = TRUE;
8577 else if (sym_sec != NULL
8578 && sym_sec->output_section != NULL)
8579 {
8580 value += sym_sec->output_offset;
8581 value += sym_sec->output_section->vma;
8582 value -= htab->elf.tls_sec->vma;
8583 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
8584 < (bfd_vma) 1 << 32);
8585 }
8586 }
8587
8588 r_type = ELF64_R_TYPE (rel->r_info);
8589 /* If this section has old-style __tls_get_addr calls
8590 without marker relocs, then check that each
8591 __tls_get_addr call reloc is preceded by a reloc
8592 that conceivably belongs to the __tls_get_addr arg
8593 setup insn. If we don't find matching arg setup
8594 relocs, don't do any tls optimization. */
8595 if (pass == 0
8596 && sec->has_tls_get_addr_call
8597 && h != NULL
8598 && (h == &htab->tls_get_addr->elf
8599 || h == &htab->tls_get_addr_fd->elf)
8600 && !found_tls_get_addr_arg
8601 && is_branch_reloc (r_type))
8602 {
8603 info->callbacks->minfo (_("%H __tls_get_addr lost arg, "
8604 "TLS optimization disabled\n"),
8605 ibfd, sec, rel->r_offset);
8606 ret = TRUE;
8607 goto err_free_rel;
8608 }
8609
8610 found_tls_get_addr_arg = 0;
8611 switch (r_type)
8612 {
8613 case R_PPC64_GOT_TLSLD16:
8614 case R_PPC64_GOT_TLSLD16_LO:
8615 expecting_tls_get_addr = 1;
8616 found_tls_get_addr_arg = 1;
8617 /* Fall through. */
8618
8619 case R_PPC64_GOT_TLSLD16_HI:
8620 case R_PPC64_GOT_TLSLD16_HA:
8621 /* These relocs should never be against a symbol
8622 defined in a shared lib. Leave them alone if
8623 that turns out to be the case. */
8624 if (!is_local)
8625 continue;
8626
8627 /* LD -> LE */
8628 tls_set = 0;
8629 tls_clear = TLS_LD;
8630 tls_type = TLS_TLS | TLS_LD;
8631 break;
8632
8633 case R_PPC64_GOT_TLSGD16:
8634 case R_PPC64_GOT_TLSGD16_LO:
8635 expecting_tls_get_addr = 1;
8636 found_tls_get_addr_arg = 1;
8637 /* Fall through. */
8638
8639 case R_PPC64_GOT_TLSGD16_HI:
8640 case R_PPC64_GOT_TLSGD16_HA:
8641 if (ok_tprel)
8642 /* GD -> LE */
8643 tls_set = 0;
8644 else
8645 /* GD -> IE */
8646 tls_set = TLS_TLS | TLS_TPRELGD;
8647 tls_clear = TLS_GD;
8648 tls_type = TLS_TLS | TLS_GD;
8649 break;
8650
8651 case R_PPC64_GOT_TPREL16_DS:
8652 case R_PPC64_GOT_TPREL16_LO_DS:
8653 case R_PPC64_GOT_TPREL16_HI:
8654 case R_PPC64_GOT_TPREL16_HA:
8655 if (ok_tprel)
8656 {
8657 /* IE -> LE */
8658 tls_set = 0;
8659 tls_clear = TLS_TPREL;
8660 tls_type = TLS_TLS | TLS_TPREL;
8661 break;
8662 }
8663 continue;
8664
8665 case R_PPC64_TLSGD:
8666 case R_PPC64_TLSLD:
8667 found_tls_get_addr_arg = 1;
8668 /* Fall through. */
8669
8670 case R_PPC64_TLS:
8671 case R_PPC64_TOC16:
8672 case R_PPC64_TOC16_LO:
8673 if (sym_sec == NULL || sym_sec != toc)
8674 continue;
8675
8676 /* Mark this toc entry as referenced by a TLS
8677 code sequence. We can do that now in the
8678 case of R_PPC64_TLS, and after checking for
8679 tls_get_addr for the TOC16 relocs. */
8680 if (toc_ref == NULL)
8681 toc_ref = bfd_zmalloc (toc->output_section->rawsize / 8);
8682 if (toc_ref == NULL)
8683 goto err_free_rel;
8684
8685 if (h != NULL)
8686 value = h->root.u.def.value;
8687 else
8688 value = sym->st_value;
8689 value += rel->r_addend;
8690 if (value % 8 != 0)
8691 continue;
8692 BFD_ASSERT (value < toc->size
8693 && toc->output_offset % 8 == 0);
8694 toc_ref_index = (value + toc->output_offset) / 8;
8695 if (r_type == R_PPC64_TLS
8696 || r_type == R_PPC64_TLSGD
8697 || r_type == R_PPC64_TLSLD)
8698 {
8699 toc_ref[toc_ref_index] = 1;
8700 continue;
8701 }
8702
8703 if (pass != 0 && toc_ref[toc_ref_index] == 0)
8704 continue;
8705
8706 tls_set = 0;
8707 tls_clear = 0;
8708 expecting_tls_get_addr = 2;
8709 break;
8710
8711 case R_PPC64_TPREL64:
8712 if (pass == 0
8713 || sec != toc
8714 || toc_ref == NULL
8715 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
8716 continue;
8717 if (ok_tprel)
8718 {
8719 /* IE -> LE */
8720 tls_set = TLS_EXPLICIT;
8721 tls_clear = TLS_TPREL;
8722 break;
8723 }
8724 continue;
8725
8726 case R_PPC64_DTPMOD64:
8727 if (pass == 0
8728 || sec != toc
8729 || toc_ref == NULL
8730 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
8731 continue;
8732 if (rel + 1 < relend
8733 && (rel[1].r_info
8734 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
8735 && rel[1].r_offset == rel->r_offset + 8)
8736 {
8737 if (ok_tprel)
8738 /* GD -> LE */
8739 tls_set = TLS_EXPLICIT | TLS_GD;
8740 else
8741 /* GD -> IE */
8742 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
8743 tls_clear = TLS_GD;
8744 }
8745 else
8746 {
8747 if (!is_local)
8748 continue;
8749
8750 /* LD -> LE */
8751 tls_set = TLS_EXPLICIT;
8752 tls_clear = TLS_LD;
8753 }
8754 break;
8755
8756 default:
8757 continue;
8758 }
8759
8760 if (pass == 0)
8761 {
8762 if (!expecting_tls_get_addr
8763 || !sec->has_tls_get_addr_call)
8764 continue;
8765
8766 if (rel + 1 < relend
8767 && branch_reloc_hash_match (ibfd, rel + 1,
8768 htab->tls_get_addr,
8769 htab->tls_get_addr_fd))
8770 {
8771 if (expecting_tls_get_addr == 2)
8772 {
8773 /* Check for toc tls entries. */
8774 unsigned char *toc_tls;
8775 int retval;
8776
8777 retval = get_tls_mask (&toc_tls, NULL, NULL,
8778 &locsyms,
8779 rel, ibfd);
8780 if (retval == 0)
8781 goto err_free_rel;
8782 if (toc_tls != NULL)
8783 {
8784 if ((*toc_tls & (TLS_GD | TLS_LD)) != 0)
8785 found_tls_get_addr_arg = 1;
8786 if (retval > 1)
8787 toc_ref[toc_ref_index] = 1;
8788 }
8789 }
8790 continue;
8791 }
8792
8793 if (expecting_tls_get_addr != 1)
8794 continue;
8795
8796 /* Uh oh, we didn't find the expected call. We
8797 could just mark this symbol to exclude it
8798 from tls optimization but it's safer to skip
8799 the entire optimization. */
8800 /* xgettext:c-format */
8801 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
8802 "TLS optimization disabled\n"),
8803 ibfd, sec, rel->r_offset);
8804 ret = TRUE;
8805 goto err_free_rel;
8806 }
8807
8808 if (expecting_tls_get_addr && htab->tls_get_addr != NULL)
8809 {
8810 struct plt_entry *ent;
8811 for (ent = htab->tls_get_addr->elf.plt.plist;
8812 ent != NULL;
8813 ent = ent->next)
8814 if (ent->addend == 0)
8815 {
8816 if (ent->plt.refcount > 0)
8817 {
8818 ent->plt.refcount -= 1;
8819 expecting_tls_get_addr = 0;
8820 }
8821 break;
8822 }
8823 }
8824
8825 if (expecting_tls_get_addr && htab->tls_get_addr_fd != NULL)
8826 {
8827 struct plt_entry *ent;
8828 for (ent = htab->tls_get_addr_fd->elf.plt.plist;
8829 ent != NULL;
8830 ent = ent->next)
8831 if (ent->addend == 0)
8832 {
8833 if (ent->plt.refcount > 0)
8834 ent->plt.refcount -= 1;
8835 break;
8836 }
8837 }
8838
8839 if (tls_clear == 0)
8840 continue;
8841
8842 if ((tls_set & TLS_EXPLICIT) == 0)
8843 {
8844 struct got_entry *ent;
8845
8846 /* Adjust got entry for this reloc. */
8847 if (h != NULL)
8848 ent = h->got.glist;
8849 else
8850 ent = elf_local_got_ents (ibfd)[r_symndx];
8851
8852 for (; ent != NULL; ent = ent->next)
8853 if (ent->addend == rel->r_addend
8854 && ent->owner == ibfd
8855 && ent->tls_type == tls_type)
8856 break;
8857 if (ent == NULL)
8858 abort ();
8859
8860 if (tls_set == 0)
8861 {
8862 /* We managed to get rid of a got entry. */
8863 if (ent->got.refcount > 0)
8864 ent->got.refcount -= 1;
8865 }
8866 }
8867 else
8868 {
8869 /* If we got rid of a DTPMOD/DTPREL reloc pair then
8870 we'll lose one or two dyn relocs. */
8871 if (!dec_dynrel_count (rel->r_info, sec, info,
8872 NULL, h, sym))
8873 return FALSE;
8874
8875 if (tls_set == (TLS_EXPLICIT | TLS_GD))
8876 {
8877 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
8878 NULL, h, sym))
8879 return FALSE;
8880 }
8881 }
8882
8883 *tls_mask |= tls_set;
8884 *tls_mask &= ~tls_clear;
8885 }
8886
8887 if (elf_section_data (sec)->relocs != relstart)
8888 free (relstart);
8889 }
8890
8891 if (locsyms != NULL
8892 && (elf_symtab_hdr (ibfd).contents != (unsigned char *) locsyms))
8893 {
8894 if (!info->keep_memory)
8895 free (locsyms);
8896 else
8897 elf_symtab_hdr (ibfd).contents = (unsigned char *) locsyms;
8898 }
8899 }
8900
8901 if (toc_ref != NULL)
8902 free (toc_ref);
8903 return TRUE;
8904 }
8905
8906 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
8907 the values of any global symbols in a toc section that has been
8908 edited. Globals in toc sections should be a rarity, so this function
8909 sets a flag if any are found in toc sections other than the one just
8910 edited, so that further hash table traversals can be avoided. */
8911
8912 struct adjust_toc_info
8913 {
8914 asection *toc;
8915 unsigned long *skip;
8916 bfd_boolean global_toc_syms;
8917 };
8918
8919 enum toc_skip_enum { ref_from_discarded = 1, can_optimize = 2 };
8920
8921 static bfd_boolean
8922 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
8923 {
8924 struct ppc_link_hash_entry *eh;
8925 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
8926 unsigned long i;
8927
8928 if (h->root.type != bfd_link_hash_defined
8929 && h->root.type != bfd_link_hash_defweak)
8930 return TRUE;
8931
8932 eh = (struct ppc_link_hash_entry *) h;
8933 if (eh->adjust_done)
8934 return TRUE;
8935
8936 if (eh->elf.root.u.def.section == toc_inf->toc)
8937 {
8938 if (eh->elf.root.u.def.value > toc_inf->toc->rawsize)
8939 i = toc_inf->toc->rawsize >> 3;
8940 else
8941 i = eh->elf.root.u.def.value >> 3;
8942
8943 if ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0)
8944 {
8945 _bfd_error_handler
8946 (_("%s defined on removed toc entry"), eh->elf.root.root.string);
8947 do
8948 ++i;
8949 while ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0);
8950 eh->elf.root.u.def.value = (bfd_vma) i << 3;
8951 }
8952
8953 eh->elf.root.u.def.value -= toc_inf->skip[i];
8954 eh->adjust_done = 1;
8955 }
8956 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
8957 toc_inf->global_toc_syms = TRUE;
8958
8959 return TRUE;
8960 }
8961
8962 /* Return TRUE iff INSN with a relocation of R_TYPE is one we expect
8963 on a _LO variety toc/got reloc. */
8964
8965 static bfd_boolean
8966 ok_lo_toc_insn (unsigned int insn, enum elf_ppc64_reloc_type r_type)
8967 {
8968 return ((insn & (0x3f << 26)) == 12u << 26 /* addic */
8969 || (insn & (0x3f << 26)) == 14u << 26 /* addi */
8970 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
8971 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
8972 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
8973 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
8974 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
8975 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
8976 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
8977 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
8978 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
8979 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
8980 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
8981 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
8982 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
8983 || (insn & (0x3f << 26)) == 56u << 26 /* lq,lfq */
8984 || ((insn & (0x3f << 26)) == 57u << 26 /* lxsd,lxssp,lfdp */
8985 /* Exclude lfqu by testing reloc. If relocs are ever
8986 defined for the reduced D field in psq_lu then those
8987 will need testing too. */
8988 && r_type != R_PPC64_TOC16_LO && r_type != R_PPC64_GOT16_LO)
8989 || ((insn & (0x3f << 26)) == 58u << 26 /* ld,lwa */
8990 && (insn & 1) == 0)
8991 || (insn & (0x3f << 26)) == 60u << 26 /* stfq */
8992 || ((insn & (0x3f << 26)) == 61u << 26 /* lxv,stx{v,sd,ssp},stfdp */
8993 /* Exclude stfqu. psq_stu as above for psq_lu. */
8994 && r_type != R_PPC64_TOC16_LO && r_type != R_PPC64_GOT16_LO)
8995 || ((insn & (0x3f << 26)) == 62u << 26 /* std,stq */
8996 && (insn & 1) == 0));
8997 }
8998
8999 /* Examine all relocs referencing .toc sections in order to remove
9000 unused .toc entries. */
9001
9002 bfd_boolean
9003 ppc64_elf_edit_toc (struct bfd_link_info *info)
9004 {
9005 bfd *ibfd;
9006 struct adjust_toc_info toc_inf;
9007 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9008
9009 htab->do_toc_opt = 1;
9010 toc_inf.global_toc_syms = TRUE;
9011 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
9012 {
9013 asection *toc, *sec;
9014 Elf_Internal_Shdr *symtab_hdr;
9015 Elf_Internal_Sym *local_syms;
9016 Elf_Internal_Rela *relstart, *rel, *toc_relocs;
9017 unsigned long *skip, *drop;
9018 unsigned char *used;
9019 unsigned char *keep, last, some_unused;
9020
9021 if (!is_ppc64_elf (ibfd))
9022 continue;
9023
9024 toc = bfd_get_section_by_name (ibfd, ".toc");
9025 if (toc == NULL
9026 || toc->size == 0
9027 || toc->sec_info_type == SEC_INFO_TYPE_JUST_SYMS
9028 || discarded_section (toc))
9029 continue;
9030
9031 toc_relocs = NULL;
9032 local_syms = NULL;
9033 symtab_hdr = &elf_symtab_hdr (ibfd);
9034
9035 /* Look at sections dropped from the final link. */
9036 skip = NULL;
9037 relstart = NULL;
9038 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
9039 {
9040 if (sec->reloc_count == 0
9041 || !discarded_section (sec)
9042 || get_opd_info (sec)
9043 || (sec->flags & SEC_ALLOC) == 0
9044 || (sec->flags & SEC_DEBUGGING) != 0)
9045 continue;
9046
9047 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
9048 if (relstart == NULL)
9049 goto error_ret;
9050
9051 /* Run through the relocs to see which toc entries might be
9052 unused. */
9053 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
9054 {
9055 enum elf_ppc64_reloc_type r_type;
9056 unsigned long r_symndx;
9057 asection *sym_sec;
9058 struct elf_link_hash_entry *h;
9059 Elf_Internal_Sym *sym;
9060 bfd_vma val;
9061
9062 r_type = ELF64_R_TYPE (rel->r_info);
9063 switch (r_type)
9064 {
9065 default:
9066 continue;
9067
9068 case R_PPC64_TOC16:
9069 case R_PPC64_TOC16_LO:
9070 case R_PPC64_TOC16_HI:
9071 case R_PPC64_TOC16_HA:
9072 case R_PPC64_TOC16_DS:
9073 case R_PPC64_TOC16_LO_DS:
9074 break;
9075 }
9076
9077 r_symndx = ELF64_R_SYM (rel->r_info);
9078 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9079 r_symndx, ibfd))
9080 goto error_ret;
9081
9082 if (sym_sec != toc)
9083 continue;
9084
9085 if (h != NULL)
9086 val = h->root.u.def.value;
9087 else
9088 val = sym->st_value;
9089 val += rel->r_addend;
9090
9091 if (val >= toc->size)
9092 continue;
9093
9094 /* Anything in the toc ought to be aligned to 8 bytes.
9095 If not, don't mark as unused. */
9096 if (val & 7)
9097 continue;
9098
9099 if (skip == NULL)
9100 {
9101 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
9102 if (skip == NULL)
9103 goto error_ret;
9104 }
9105
9106 skip[val >> 3] = ref_from_discarded;
9107 }
9108
9109 if (elf_section_data (sec)->relocs != relstart)
9110 free (relstart);
9111 }
9112
9113 /* For largetoc loads of address constants, we can convert
9114 . addis rx,2,addr@got@ha
9115 . ld ry,addr@got@l(rx)
9116 to
9117 . addis rx,2,addr@toc@ha
9118 . addi ry,rx,addr@toc@l
9119 when addr is within 2G of the toc pointer. This then means
9120 that the word storing "addr" in the toc is no longer needed. */
9121
9122 if (!ppc64_elf_tdata (ibfd)->has_small_toc_reloc
9123 && toc->output_section->rawsize < (bfd_vma) 1 << 31
9124 && toc->reloc_count != 0)
9125 {
9126 /* Read toc relocs. */
9127 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
9128 info->keep_memory);
9129 if (toc_relocs == NULL)
9130 goto error_ret;
9131
9132 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
9133 {
9134 enum elf_ppc64_reloc_type r_type;
9135 unsigned long r_symndx;
9136 asection *sym_sec;
9137 struct elf_link_hash_entry *h;
9138 Elf_Internal_Sym *sym;
9139 bfd_vma val, addr;
9140
9141 r_type = ELF64_R_TYPE (rel->r_info);
9142 if (r_type != R_PPC64_ADDR64)
9143 continue;
9144
9145 r_symndx = ELF64_R_SYM (rel->r_info);
9146 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9147 r_symndx, ibfd))
9148 goto error_ret;
9149
9150 if (sym_sec == NULL
9151 || sym_sec->output_section == NULL
9152 || discarded_section (sym_sec))
9153 continue;
9154
9155 if (!SYMBOL_REFERENCES_LOCAL (info, h))
9156 continue;
9157
9158 if (h != NULL)
9159 {
9160 if (h->type == STT_GNU_IFUNC)
9161 continue;
9162 val = h->root.u.def.value;
9163 }
9164 else
9165 {
9166 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
9167 continue;
9168 val = sym->st_value;
9169 }
9170 val += rel->r_addend;
9171 val += sym_sec->output_section->vma + sym_sec->output_offset;
9172
9173 /* We don't yet know the exact toc pointer value, but we
9174 know it will be somewhere in the toc section. Don't
9175 optimize if the difference from any possible toc
9176 pointer is outside [ff..f80008000, 7fff7fff]. */
9177 addr = toc->output_section->vma + TOC_BASE_OFF;
9178 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
9179 continue;
9180
9181 addr = toc->output_section->vma + toc->output_section->rawsize;
9182 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
9183 continue;
9184
9185 if (skip == NULL)
9186 {
9187 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
9188 if (skip == NULL)
9189 goto error_ret;
9190 }
9191
9192 skip[rel->r_offset >> 3]
9193 |= can_optimize | ((rel - toc_relocs) << 2);
9194 }
9195 }
9196
9197 if (skip == NULL)
9198 continue;
9199
9200 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
9201 if (used == NULL)
9202 {
9203 error_ret:
9204 if (local_syms != NULL
9205 && symtab_hdr->contents != (unsigned char *) local_syms)
9206 free (local_syms);
9207 if (sec != NULL
9208 && relstart != NULL
9209 && elf_section_data (sec)->relocs != relstart)
9210 free (relstart);
9211 if (toc_relocs != NULL
9212 && elf_section_data (toc)->relocs != toc_relocs)
9213 free (toc_relocs);
9214 if (skip != NULL)
9215 free (skip);
9216 return FALSE;
9217 }
9218
9219 /* Now check all kept sections that might reference the toc.
9220 Check the toc itself last. */
9221 for (sec = (ibfd->sections == toc && toc->next ? toc->next
9222 : ibfd->sections);
9223 sec != NULL;
9224 sec = (sec == toc ? NULL
9225 : sec->next == NULL ? toc
9226 : sec->next == toc && toc->next ? toc->next
9227 : sec->next))
9228 {
9229 int repeat;
9230
9231 if (sec->reloc_count == 0
9232 || discarded_section (sec)
9233 || get_opd_info (sec)
9234 || (sec->flags & SEC_ALLOC) == 0
9235 || (sec->flags & SEC_DEBUGGING) != 0)
9236 continue;
9237
9238 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
9239 info->keep_memory);
9240 if (relstart == NULL)
9241 {
9242 free (used);
9243 goto error_ret;
9244 }
9245
9246 /* Mark toc entries referenced as used. */
9247 do
9248 {
9249 repeat = 0;
9250 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
9251 {
9252 enum elf_ppc64_reloc_type r_type;
9253 unsigned long r_symndx;
9254 asection *sym_sec;
9255 struct elf_link_hash_entry *h;
9256 Elf_Internal_Sym *sym;
9257 bfd_vma val;
9258 enum {no_check, check_lo, check_ha} insn_check;
9259
9260 r_type = ELF64_R_TYPE (rel->r_info);
9261 switch (r_type)
9262 {
9263 default:
9264 insn_check = no_check;
9265 break;
9266
9267 case R_PPC64_GOT_TLSLD16_HA:
9268 case R_PPC64_GOT_TLSGD16_HA:
9269 case R_PPC64_GOT_TPREL16_HA:
9270 case R_PPC64_GOT_DTPREL16_HA:
9271 case R_PPC64_GOT16_HA:
9272 case R_PPC64_TOC16_HA:
9273 insn_check = check_ha;
9274 break;
9275
9276 case R_PPC64_GOT_TLSLD16_LO:
9277 case R_PPC64_GOT_TLSGD16_LO:
9278 case R_PPC64_GOT_TPREL16_LO_DS:
9279 case R_PPC64_GOT_DTPREL16_LO_DS:
9280 case R_PPC64_GOT16_LO:
9281 case R_PPC64_GOT16_LO_DS:
9282 case R_PPC64_TOC16_LO:
9283 case R_PPC64_TOC16_LO_DS:
9284 insn_check = check_lo;
9285 break;
9286 }
9287
9288 if (insn_check != no_check)
9289 {
9290 bfd_vma off = rel->r_offset & ~3;
9291 unsigned char buf[4];
9292 unsigned int insn;
9293
9294 if (!bfd_get_section_contents (ibfd, sec, buf, off, 4))
9295 {
9296 free (used);
9297 goto error_ret;
9298 }
9299 insn = bfd_get_32 (ibfd, buf);
9300 if (insn_check == check_lo
9301 ? !ok_lo_toc_insn (insn, r_type)
9302 : ((insn & ((0x3f << 26) | 0x1f << 16))
9303 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */))
9304 {
9305 char str[12];
9306
9307 ppc64_elf_tdata (ibfd)->unexpected_toc_insn = 1;
9308 sprintf (str, "%#08x", insn);
9309 info->callbacks->einfo
9310 /* xgettext:c-format */
9311 (_("%H: toc optimization is not supported for"
9312 " %s instruction.\n"),
9313 ibfd, sec, rel->r_offset & ~3, str);
9314 }
9315 }
9316
9317 switch (r_type)
9318 {
9319 case R_PPC64_TOC16:
9320 case R_PPC64_TOC16_LO:
9321 case R_PPC64_TOC16_HI:
9322 case R_PPC64_TOC16_HA:
9323 case R_PPC64_TOC16_DS:
9324 case R_PPC64_TOC16_LO_DS:
9325 /* In case we're taking addresses of toc entries. */
9326 case R_PPC64_ADDR64:
9327 break;
9328
9329 default:
9330 continue;
9331 }
9332
9333 r_symndx = ELF64_R_SYM (rel->r_info);
9334 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9335 r_symndx, ibfd))
9336 {
9337 free (used);
9338 goto error_ret;
9339 }
9340
9341 if (sym_sec != toc)
9342 continue;
9343
9344 if (h != NULL)
9345 val = h->root.u.def.value;
9346 else
9347 val = sym->st_value;
9348 val += rel->r_addend;
9349
9350 if (val >= toc->size)
9351 continue;
9352
9353 if ((skip[val >> 3] & can_optimize) != 0)
9354 {
9355 bfd_vma off;
9356 unsigned char opc;
9357
9358 switch (r_type)
9359 {
9360 case R_PPC64_TOC16_HA:
9361 break;
9362
9363 case R_PPC64_TOC16_LO_DS:
9364 off = rel->r_offset;
9365 off += (bfd_big_endian (ibfd) ? -2 : 3);
9366 if (!bfd_get_section_contents (ibfd, sec, &opc,
9367 off, 1))
9368 {
9369 free (used);
9370 goto error_ret;
9371 }
9372 if ((opc & (0x3f << 2)) == (58u << 2))
9373 break;
9374 /* Fall through. */
9375
9376 default:
9377 /* Wrong sort of reloc, or not a ld. We may
9378 as well clear ref_from_discarded too. */
9379 skip[val >> 3] = 0;
9380 }
9381 }
9382
9383 if (sec != toc)
9384 used[val >> 3] = 1;
9385 /* For the toc section, we only mark as used if this
9386 entry itself isn't unused. */
9387 else if ((used[rel->r_offset >> 3]
9388 || !(skip[rel->r_offset >> 3] & ref_from_discarded))
9389 && !used[val >> 3])
9390 {
9391 /* Do all the relocs again, to catch reference
9392 chains. */
9393 repeat = 1;
9394 used[val >> 3] = 1;
9395 }
9396 }
9397 }
9398 while (repeat);
9399
9400 if (elf_section_data (sec)->relocs != relstart)
9401 free (relstart);
9402 }
9403
9404 /* Merge the used and skip arrays. Assume that TOC
9405 doublewords not appearing as either used or unused belong
9406 to an entry more than one doubleword in size. */
9407 for (drop = skip, keep = used, last = 0, some_unused = 0;
9408 drop < skip + (toc->size + 7) / 8;
9409 ++drop, ++keep)
9410 {
9411 if (*keep)
9412 {
9413 *drop &= ~ref_from_discarded;
9414 if ((*drop & can_optimize) != 0)
9415 some_unused = 1;
9416 last = 0;
9417 }
9418 else if ((*drop & ref_from_discarded) != 0)
9419 {
9420 some_unused = 1;
9421 last = ref_from_discarded;
9422 }
9423 else
9424 *drop = last;
9425 }
9426
9427 free (used);
9428
9429 if (some_unused)
9430 {
9431 bfd_byte *contents, *src;
9432 unsigned long off;
9433 Elf_Internal_Sym *sym;
9434 bfd_boolean local_toc_syms = FALSE;
9435
9436 /* Shuffle the toc contents, and at the same time convert the
9437 skip array from booleans into offsets. */
9438 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
9439 goto error_ret;
9440
9441 elf_section_data (toc)->this_hdr.contents = contents;
9442
9443 for (src = contents, off = 0, drop = skip;
9444 src < contents + toc->size;
9445 src += 8, ++drop)
9446 {
9447 if ((*drop & (can_optimize | ref_from_discarded)) != 0)
9448 off += 8;
9449 else if (off != 0)
9450 {
9451 *drop = off;
9452 memcpy (src - off, src, 8);
9453 }
9454 }
9455 *drop = off;
9456 toc->rawsize = toc->size;
9457 toc->size = src - contents - off;
9458
9459 /* Adjust addends for relocs against the toc section sym,
9460 and optimize any accesses we can. */
9461 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
9462 {
9463 if (sec->reloc_count == 0
9464 || discarded_section (sec))
9465 continue;
9466
9467 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
9468 info->keep_memory);
9469 if (relstart == NULL)
9470 goto error_ret;
9471
9472 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
9473 {
9474 enum elf_ppc64_reloc_type r_type;
9475 unsigned long r_symndx;
9476 asection *sym_sec;
9477 struct elf_link_hash_entry *h;
9478 bfd_vma val;
9479
9480 r_type = ELF64_R_TYPE (rel->r_info);
9481 switch (r_type)
9482 {
9483 default:
9484 continue;
9485
9486 case R_PPC64_TOC16:
9487 case R_PPC64_TOC16_LO:
9488 case R_PPC64_TOC16_HI:
9489 case R_PPC64_TOC16_HA:
9490 case R_PPC64_TOC16_DS:
9491 case R_PPC64_TOC16_LO_DS:
9492 case R_PPC64_ADDR64:
9493 break;
9494 }
9495
9496 r_symndx = ELF64_R_SYM (rel->r_info);
9497 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9498 r_symndx, ibfd))
9499 goto error_ret;
9500
9501 if (sym_sec != toc)
9502 continue;
9503
9504 if (h != NULL)
9505 val = h->root.u.def.value;
9506 else
9507 {
9508 val = sym->st_value;
9509 if (val != 0)
9510 local_toc_syms = TRUE;
9511 }
9512
9513 val += rel->r_addend;
9514
9515 if (val > toc->rawsize)
9516 val = toc->rawsize;
9517 else if ((skip[val >> 3] & ref_from_discarded) != 0)
9518 continue;
9519 else if ((skip[val >> 3] & can_optimize) != 0)
9520 {
9521 Elf_Internal_Rela *tocrel
9522 = toc_relocs + (skip[val >> 3] >> 2);
9523 unsigned long tsym = ELF64_R_SYM (tocrel->r_info);
9524
9525 switch (r_type)
9526 {
9527 case R_PPC64_TOC16_HA:
9528 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_TOC16_HA);
9529 break;
9530
9531 case R_PPC64_TOC16_LO_DS:
9532 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_LO_DS_OPT);
9533 break;
9534
9535 default:
9536 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
9537 ppc_howto_init ();
9538 info->callbacks->einfo
9539 /* xgettext:c-format */
9540 (_("%H: %s references "
9541 "optimized away TOC entry\n"),
9542 ibfd, sec, rel->r_offset,
9543 ppc64_elf_howto_table[r_type]->name);
9544 bfd_set_error (bfd_error_bad_value);
9545 goto error_ret;
9546 }
9547 rel->r_addend = tocrel->r_addend;
9548 elf_section_data (sec)->relocs = relstart;
9549 continue;
9550 }
9551
9552 if (h != NULL || sym->st_value != 0)
9553 continue;
9554
9555 rel->r_addend -= skip[val >> 3];
9556 elf_section_data (sec)->relocs = relstart;
9557 }
9558
9559 if (elf_section_data (sec)->relocs != relstart)
9560 free (relstart);
9561 }
9562
9563 /* We shouldn't have local or global symbols defined in the TOC,
9564 but handle them anyway. */
9565 if (local_syms != NULL)
9566 for (sym = local_syms;
9567 sym < local_syms + symtab_hdr->sh_info;
9568 ++sym)
9569 if (sym->st_value != 0
9570 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
9571 {
9572 unsigned long i;
9573
9574 if (sym->st_value > toc->rawsize)
9575 i = toc->rawsize >> 3;
9576 else
9577 i = sym->st_value >> 3;
9578
9579 if ((skip[i] & (ref_from_discarded | can_optimize)) != 0)
9580 {
9581 if (local_toc_syms)
9582 _bfd_error_handler
9583 (_("%s defined on removed toc entry"),
9584 bfd_elf_sym_name (ibfd, symtab_hdr, sym, NULL));
9585 do
9586 ++i;
9587 while ((skip[i] & (ref_from_discarded | can_optimize)));
9588 sym->st_value = (bfd_vma) i << 3;
9589 }
9590
9591 sym->st_value -= skip[i];
9592 symtab_hdr->contents = (unsigned char *) local_syms;
9593 }
9594
9595 /* Adjust any global syms defined in this toc input section. */
9596 if (toc_inf.global_toc_syms)
9597 {
9598 toc_inf.toc = toc;
9599 toc_inf.skip = skip;
9600 toc_inf.global_toc_syms = FALSE;
9601 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
9602 &toc_inf);
9603 }
9604
9605 if (toc->reloc_count != 0)
9606 {
9607 Elf_Internal_Shdr *rel_hdr;
9608 Elf_Internal_Rela *wrel;
9609 bfd_size_type sz;
9610
9611 /* Remove unused toc relocs, and adjust those we keep. */
9612 if (toc_relocs == NULL)
9613 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
9614 info->keep_memory);
9615 if (toc_relocs == NULL)
9616 goto error_ret;
9617
9618 wrel = toc_relocs;
9619 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
9620 if ((skip[rel->r_offset >> 3]
9621 & (ref_from_discarded | can_optimize)) == 0)
9622 {
9623 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
9624 wrel->r_info = rel->r_info;
9625 wrel->r_addend = rel->r_addend;
9626 ++wrel;
9627 }
9628 else if (!dec_dynrel_count (rel->r_info, toc, info,
9629 &local_syms, NULL, NULL))
9630 goto error_ret;
9631
9632 elf_section_data (toc)->relocs = toc_relocs;
9633 toc->reloc_count = wrel - toc_relocs;
9634 rel_hdr = _bfd_elf_single_rel_hdr (toc);
9635 sz = rel_hdr->sh_entsize;
9636 rel_hdr->sh_size = toc->reloc_count * sz;
9637 }
9638 }
9639 else if (toc_relocs != NULL
9640 && elf_section_data (toc)->relocs != toc_relocs)
9641 free (toc_relocs);
9642
9643 if (local_syms != NULL
9644 && symtab_hdr->contents != (unsigned char *) local_syms)
9645 {
9646 if (!info->keep_memory)
9647 free (local_syms);
9648 else
9649 symtab_hdr->contents = (unsigned char *) local_syms;
9650 }
9651 free (skip);
9652 }
9653
9654 return TRUE;
9655 }
9656
9657 /* Return true iff input section I references the TOC using
9658 instructions limited to +/-32k offsets. */
9659
9660 bfd_boolean
9661 ppc64_elf_has_small_toc_reloc (asection *i)
9662 {
9663 return (is_ppc64_elf (i->owner)
9664 && ppc64_elf_tdata (i->owner)->has_small_toc_reloc);
9665 }
9666
9667 /* Allocate space for one GOT entry. */
9668
9669 static void
9670 allocate_got (struct elf_link_hash_entry *h,
9671 struct bfd_link_info *info,
9672 struct got_entry *gent)
9673 {
9674 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9675 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
9676 int entsize = (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)
9677 ? 16 : 8);
9678 int rentsize = (gent->tls_type & eh->tls_mask & TLS_GD
9679 ? 2 : 1) * sizeof (Elf64_External_Rela);
9680 asection *got = ppc64_elf_tdata (gent->owner)->got;
9681
9682 gent->got.offset = got->size;
9683 got->size += entsize;
9684
9685 if (h->type == STT_GNU_IFUNC)
9686 {
9687 htab->elf.irelplt->size += rentsize;
9688 htab->got_reli_size += rentsize;
9689 }
9690 else if ((bfd_link_pic (info)
9691 || (htab->elf.dynamic_sections_created
9692 && h->dynindx != -1
9693 && !SYMBOL_REFERENCES_LOCAL (info, h)))
9694 && !UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
9695 {
9696 asection *relgot = ppc64_elf_tdata (gent->owner)->relgot;
9697 relgot->size += rentsize;
9698 }
9699 }
9700
9701 /* This function merges got entries in the same toc group. */
9702
9703 static void
9704 merge_got_entries (struct got_entry **pent)
9705 {
9706 struct got_entry *ent, *ent2;
9707
9708 for (ent = *pent; ent != NULL; ent = ent->next)
9709 if (!ent->is_indirect)
9710 for (ent2 = ent->next; ent2 != NULL; ent2 = ent2->next)
9711 if (!ent2->is_indirect
9712 && ent2->addend == ent->addend
9713 && ent2->tls_type == ent->tls_type
9714 && elf_gp (ent2->owner) == elf_gp (ent->owner))
9715 {
9716 ent2->is_indirect = TRUE;
9717 ent2->got.ent = ent;
9718 }
9719 }
9720
9721 /* If H is undefined weak, make it dynamic if that makes sense. */
9722
9723 static bfd_boolean
9724 ensure_undefweak_dynamic (struct bfd_link_info *info,
9725 struct elf_link_hash_entry *h)
9726 {
9727 struct elf_link_hash_table *htab = elf_hash_table (info);
9728
9729 if (htab->dynamic_sections_created
9730 && info->dynamic_undefined_weak != 0
9731 && h->root.type == bfd_link_hash_undefweak
9732 && h->dynindx == -1
9733 && !h->forced_local
9734 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
9735 return bfd_elf_link_record_dynamic_symbol (info, h);
9736 return TRUE;
9737 }
9738
9739 /* Allocate space in .plt, .got and associated reloc sections for
9740 dynamic relocs. */
9741
9742 static bfd_boolean
9743 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
9744 {
9745 struct bfd_link_info *info;
9746 struct ppc_link_hash_table *htab;
9747 asection *s;
9748 struct ppc_link_hash_entry *eh;
9749 struct got_entry **pgent, *gent;
9750
9751 if (h->root.type == bfd_link_hash_indirect)
9752 return TRUE;
9753
9754 info = (struct bfd_link_info *) inf;
9755 htab = ppc_hash_table (info);
9756 if (htab == NULL)
9757 return FALSE;
9758
9759 eh = (struct ppc_link_hash_entry *) h;
9760 /* Run through the TLS GD got entries first if we're changing them
9761 to TPREL. */
9762 if ((eh->tls_mask & TLS_TPRELGD) != 0)
9763 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9764 if (gent->got.refcount > 0
9765 && (gent->tls_type & TLS_GD) != 0)
9766 {
9767 /* This was a GD entry that has been converted to TPREL. If
9768 there happens to be a TPREL entry we can use that one. */
9769 struct got_entry *ent;
9770 for (ent = h->got.glist; ent != NULL; ent = ent->next)
9771 if (ent->got.refcount > 0
9772 && (ent->tls_type & TLS_TPREL) != 0
9773 && ent->addend == gent->addend
9774 && ent->owner == gent->owner)
9775 {
9776 gent->got.refcount = 0;
9777 break;
9778 }
9779
9780 /* If not, then we'll be using our own TPREL entry. */
9781 if (gent->got.refcount != 0)
9782 gent->tls_type = TLS_TLS | TLS_TPREL;
9783 }
9784
9785 /* Remove any list entry that won't generate a word in the GOT before
9786 we call merge_got_entries. Otherwise we risk merging to empty
9787 entries. */
9788 pgent = &h->got.glist;
9789 while ((gent = *pgent) != NULL)
9790 if (gent->got.refcount > 0)
9791 {
9792 if ((gent->tls_type & TLS_LD) != 0
9793 && !h->def_dynamic)
9794 {
9795 ppc64_tlsld_got (gent->owner)->got.refcount += 1;
9796 *pgent = gent->next;
9797 }
9798 else
9799 pgent = &gent->next;
9800 }
9801 else
9802 *pgent = gent->next;
9803
9804 if (!htab->do_multi_toc)
9805 merge_got_entries (&h->got.glist);
9806
9807 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9808 if (!gent->is_indirect)
9809 {
9810 /* Make sure this symbol is output as a dynamic symbol.
9811 Undefined weak syms won't yet be marked as dynamic. */
9812 if (!ensure_undefweak_dynamic (info, h))
9813 return FALSE;
9814
9815 if (!is_ppc64_elf (gent->owner))
9816 abort ();
9817
9818 allocate_got (h, info, gent);
9819 }
9820
9821 /* If no dynamic sections we can't have dynamic relocs, except for
9822 IFUNCs which are handled even in static executables. */
9823 if (!htab->elf.dynamic_sections_created
9824 && h->type != STT_GNU_IFUNC)
9825 eh->dyn_relocs = NULL;
9826
9827 /* Also discard relocs on undefined weak syms with non-default
9828 visibility, or when dynamic_undefined_weak says so. */
9829 else if (UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
9830 eh->dyn_relocs = NULL;
9831
9832 if (eh->dyn_relocs != NULL)
9833 {
9834 struct elf_dyn_relocs *p, **pp;
9835
9836 /* In the shared -Bsymbolic case, discard space allocated for
9837 dynamic pc-relative relocs against symbols which turn out to
9838 be defined in regular objects. For the normal shared case,
9839 discard space for relocs that have become local due to symbol
9840 visibility changes. */
9841
9842 if (bfd_link_pic (info))
9843 {
9844 /* Relocs that use pc_count are those that appear on a call
9845 insn, or certain REL relocs (see must_be_dyn_reloc) that
9846 can be generated via assembly. We want calls to
9847 protected symbols to resolve directly to the function
9848 rather than going via the plt. If people want function
9849 pointer comparisons to work as expected then they should
9850 avoid writing weird assembly. */
9851 if (SYMBOL_CALLS_LOCAL (info, h))
9852 {
9853 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
9854 {
9855 p->count -= p->pc_count;
9856 p->pc_count = 0;
9857 if (p->count == 0)
9858 *pp = p->next;
9859 else
9860 pp = &p->next;
9861 }
9862 }
9863
9864 if (eh->dyn_relocs != NULL)
9865 {
9866 /* Make sure this symbol is output as a dynamic symbol.
9867 Undefined weak syms won't yet be marked as dynamic. */
9868 if (!ensure_undefweak_dynamic (info, h))
9869 return FALSE;
9870 }
9871 }
9872 else if (h->type == STT_GNU_IFUNC)
9873 {
9874 /* A plt entry is always created when making direct calls to
9875 an ifunc, even when building a static executable, but
9876 that doesn't cover all cases. We may have only an ifunc
9877 initialised function pointer for a given ifunc symbol.
9878
9879 For ELFv2, dynamic relocations are not required when
9880 generating a global entry PLT stub. */
9881 if (abiversion (info->output_bfd) >= 2)
9882 {
9883 if (global_entry_stub (h))
9884 eh->dyn_relocs = NULL;
9885 }
9886
9887 /* For ELFv1 we have function descriptors. Descriptors need
9888 to be treated like PLT entries and thus have dynamic
9889 relocations. One exception is when the function
9890 descriptor is copied into .dynbss (which should only
9891 happen with ancient versions of gcc). */
9892 else if (h->needs_copy)
9893 eh->dyn_relocs = NULL;
9894 }
9895 else if (ELIMINATE_COPY_RELOCS)
9896 {
9897 /* For the non-pic case, discard space for relocs against
9898 symbols which turn out to need copy relocs or are not
9899 dynamic. */
9900 if (!h->non_got_ref
9901 && !h->def_regular)
9902 {
9903 /* Make sure this symbol is output as a dynamic symbol.
9904 Undefined weak syms won't yet be marked as dynamic. */
9905 if (!ensure_undefweak_dynamic (info, h))
9906 return FALSE;
9907
9908 if (h->dynindx == -1)
9909 eh->dyn_relocs = NULL;
9910 }
9911 else
9912 eh->dyn_relocs = NULL;
9913 }
9914
9915 /* Finally, allocate space. */
9916 for (p = eh->dyn_relocs; p != NULL; p = p->next)
9917 {
9918 asection *sreloc = elf_section_data (p->sec)->sreloc;
9919 if (eh->elf.type == STT_GNU_IFUNC)
9920 sreloc = htab->elf.irelplt;
9921 sreloc->size += p->count * sizeof (Elf64_External_Rela);
9922 }
9923 }
9924
9925 if ((htab->elf.dynamic_sections_created
9926 && h->dynindx != -1)
9927 || h->type == STT_GNU_IFUNC)
9928 {
9929 struct plt_entry *pent;
9930 bfd_boolean doneone = FALSE;
9931 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
9932 if (pent->plt.refcount > 0)
9933 {
9934 if (!htab->elf.dynamic_sections_created
9935 || h->dynindx == -1)
9936 {
9937 s = htab->elf.iplt;
9938 pent->plt.offset = s->size;
9939 s->size += PLT_ENTRY_SIZE (htab);
9940 s = htab->elf.irelplt;
9941 }
9942 else
9943 {
9944 /* If this is the first .plt entry, make room for the special
9945 first entry. */
9946 s = htab->elf.splt;
9947 if (s->size == 0)
9948 s->size += PLT_INITIAL_ENTRY_SIZE (htab);
9949
9950 pent->plt.offset = s->size;
9951
9952 /* Make room for this entry. */
9953 s->size += PLT_ENTRY_SIZE (htab);
9954
9955 /* Make room for the .glink code. */
9956 s = htab->glink;
9957 if (s->size == 0)
9958 s->size += GLINK_CALL_STUB_SIZE;
9959 if (htab->opd_abi)
9960 {
9961 /* We need bigger stubs past index 32767. */
9962 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
9963 s->size += 4;
9964 s->size += 2*4;
9965 }
9966 else
9967 s->size += 4;
9968
9969 /* We also need to make an entry in the .rela.plt section. */
9970 s = htab->elf.srelplt;
9971 }
9972 s->size += sizeof (Elf64_External_Rela);
9973 doneone = TRUE;
9974 }
9975 else
9976 pent->plt.offset = (bfd_vma) -1;
9977 if (!doneone)
9978 {
9979 h->plt.plist = NULL;
9980 h->needs_plt = 0;
9981 }
9982 }
9983 else
9984 {
9985 h->plt.plist = NULL;
9986 h->needs_plt = 0;
9987 }
9988
9989 return TRUE;
9990 }
9991
9992 /* Called via elf_link_hash_traverse from ppc64_elf_size_dynamic_sections
9993 to set up space for global entry stubs. These are put in glink,
9994 after the branch table. */
9995
9996 static bfd_boolean
9997 size_global_entry_stubs (struct elf_link_hash_entry *h, void *inf)
9998 {
9999 struct bfd_link_info *info;
10000 struct ppc_link_hash_table *htab;
10001 struct plt_entry *pent;
10002 asection *s;
10003
10004 if (h->root.type == bfd_link_hash_indirect)
10005 return TRUE;
10006
10007 if (!h->pointer_equality_needed)
10008 return TRUE;
10009
10010 if (h->def_regular)
10011 return TRUE;
10012
10013 info = inf;
10014 htab = ppc_hash_table (info);
10015 if (htab == NULL)
10016 return FALSE;
10017
10018 s = htab->glink;
10019 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
10020 if (pent->plt.offset != (bfd_vma) -1
10021 && pent->addend == 0)
10022 {
10023 /* For ELFv2, if this symbol is not defined in a regular file
10024 and we are not generating a shared library or pie, then we
10025 need to define the symbol in the executable on a call stub.
10026 This is to avoid text relocations. */
10027 s->size = (s->size + 15) & -16;
10028 h->root.type = bfd_link_hash_defined;
10029 h->root.u.def.section = s;
10030 h->root.u.def.value = s->size;
10031 s->size += 16;
10032 break;
10033 }
10034 return TRUE;
10035 }
10036
10037 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
10038 read-only sections. */
10039
10040 static bfd_boolean
10041 maybe_set_textrel (struct elf_link_hash_entry *h, void *info)
10042 {
10043 if (h->root.type == bfd_link_hash_indirect)
10044 return TRUE;
10045
10046 if (readonly_dynrelocs (h))
10047 {
10048 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
10049
10050 /* Not an error, just cut short the traversal. */
10051 return FALSE;
10052 }
10053 return TRUE;
10054 }
10055
10056 /* Set the sizes of the dynamic sections. */
10057
10058 static bfd_boolean
10059 ppc64_elf_size_dynamic_sections (bfd *output_bfd,
10060 struct bfd_link_info *info)
10061 {
10062 struct ppc_link_hash_table *htab;
10063 bfd *dynobj;
10064 asection *s;
10065 bfd_boolean relocs;
10066 bfd *ibfd;
10067 struct got_entry *first_tlsld;
10068
10069 htab = ppc_hash_table (info);
10070 if (htab == NULL)
10071 return FALSE;
10072
10073 dynobj = htab->elf.dynobj;
10074 if (dynobj == NULL)
10075 abort ();
10076
10077 if (htab->elf.dynamic_sections_created)
10078 {
10079 /* Set the contents of the .interp section to the interpreter. */
10080 if (bfd_link_executable (info) && !info->nointerp)
10081 {
10082 s = bfd_get_linker_section (dynobj, ".interp");
10083 if (s == NULL)
10084 abort ();
10085 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
10086 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
10087 }
10088 }
10089
10090 /* Set up .got offsets for local syms, and space for local dynamic
10091 relocs. */
10092 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
10093 {
10094 struct got_entry **lgot_ents;
10095 struct got_entry **end_lgot_ents;
10096 struct plt_entry **local_plt;
10097 struct plt_entry **end_local_plt;
10098 unsigned char *lgot_masks;
10099 bfd_size_type locsymcount;
10100 Elf_Internal_Shdr *symtab_hdr;
10101
10102 if (!is_ppc64_elf (ibfd))
10103 continue;
10104
10105 for (s = ibfd->sections; s != NULL; s = s->next)
10106 {
10107 struct ppc_dyn_relocs *p;
10108
10109 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
10110 {
10111 if (!bfd_is_abs_section (p->sec)
10112 && bfd_is_abs_section (p->sec->output_section))
10113 {
10114 /* Input section has been discarded, either because
10115 it is a copy of a linkonce section or due to
10116 linker script /DISCARD/, so we'll be discarding
10117 the relocs too. */
10118 }
10119 else if (p->count != 0)
10120 {
10121 asection *srel = elf_section_data (p->sec)->sreloc;
10122 if (p->ifunc)
10123 srel = htab->elf.irelplt;
10124 srel->size += p->count * sizeof (Elf64_External_Rela);
10125 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
10126 info->flags |= DF_TEXTREL;
10127 }
10128 }
10129 }
10130
10131 lgot_ents = elf_local_got_ents (ibfd);
10132 if (!lgot_ents)
10133 continue;
10134
10135 symtab_hdr = &elf_symtab_hdr (ibfd);
10136 locsymcount = symtab_hdr->sh_info;
10137 end_lgot_ents = lgot_ents + locsymcount;
10138 local_plt = (struct plt_entry **) end_lgot_ents;
10139 end_local_plt = local_plt + locsymcount;
10140 lgot_masks = (unsigned char *) end_local_plt;
10141 s = ppc64_elf_tdata (ibfd)->got;
10142 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
10143 {
10144 struct got_entry **pent, *ent;
10145
10146 pent = lgot_ents;
10147 while ((ent = *pent) != NULL)
10148 if (ent->got.refcount > 0)
10149 {
10150 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
10151 {
10152 ppc64_tlsld_got (ibfd)->got.refcount += 1;
10153 *pent = ent->next;
10154 }
10155 else
10156 {
10157 unsigned int ent_size = 8;
10158 unsigned int rel_size = sizeof (Elf64_External_Rela);
10159
10160 ent->got.offset = s->size;
10161 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
10162 {
10163 ent_size *= 2;
10164 rel_size *= 2;
10165 }
10166 s->size += ent_size;
10167 if ((*lgot_masks & PLT_IFUNC) != 0)
10168 {
10169 htab->elf.irelplt->size += rel_size;
10170 htab->got_reli_size += rel_size;
10171 }
10172 else if (bfd_link_pic (info))
10173 {
10174 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
10175 srel->size += rel_size;
10176 }
10177 pent = &ent->next;
10178 }
10179 }
10180 else
10181 *pent = ent->next;
10182 }
10183
10184 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
10185 for (; local_plt < end_local_plt; ++local_plt)
10186 {
10187 struct plt_entry *ent;
10188
10189 for (ent = *local_plt; ent != NULL; ent = ent->next)
10190 if (ent->plt.refcount > 0)
10191 {
10192 s = htab->elf.iplt;
10193 ent->plt.offset = s->size;
10194 s->size += PLT_ENTRY_SIZE (htab);
10195
10196 htab->elf.irelplt->size += sizeof (Elf64_External_Rela);
10197 }
10198 else
10199 ent->plt.offset = (bfd_vma) -1;
10200 }
10201 }
10202
10203 /* Allocate global sym .plt and .got entries, and space for global
10204 sym dynamic relocs. */
10205 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
10206 /* Stash the end of glink branch table. */
10207 if (htab->glink != NULL)
10208 htab->glink->rawsize = htab->glink->size;
10209
10210 if (!htab->opd_abi && !bfd_link_pic (info))
10211 elf_link_hash_traverse (&htab->elf, size_global_entry_stubs, info);
10212
10213 first_tlsld = NULL;
10214 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
10215 {
10216 struct got_entry *ent;
10217
10218 if (!is_ppc64_elf (ibfd))
10219 continue;
10220
10221 ent = ppc64_tlsld_got (ibfd);
10222 if (ent->got.refcount > 0)
10223 {
10224 if (!htab->do_multi_toc && first_tlsld != NULL)
10225 {
10226 ent->is_indirect = TRUE;
10227 ent->got.ent = first_tlsld;
10228 }
10229 else
10230 {
10231 if (first_tlsld == NULL)
10232 first_tlsld = ent;
10233 s = ppc64_elf_tdata (ibfd)->got;
10234 ent->got.offset = s->size;
10235 ent->owner = ibfd;
10236 s->size += 16;
10237 if (bfd_link_pic (info))
10238 {
10239 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
10240 srel->size += sizeof (Elf64_External_Rela);
10241 }
10242 }
10243 }
10244 else
10245 ent->got.offset = (bfd_vma) -1;
10246 }
10247
10248 /* We now have determined the sizes of the various dynamic sections.
10249 Allocate memory for them. */
10250 relocs = FALSE;
10251 for (s = dynobj->sections; s != NULL; s = s->next)
10252 {
10253 if ((s->flags & SEC_LINKER_CREATED) == 0)
10254 continue;
10255
10256 if (s == htab->brlt || s == htab->relbrlt)
10257 /* These haven't been allocated yet; don't strip. */
10258 continue;
10259 else if (s == htab->elf.sgot
10260 || s == htab->elf.splt
10261 || s == htab->elf.iplt
10262 || s == htab->glink
10263 || s == htab->elf.sdynbss
10264 || s == htab->elf.sdynrelro)
10265 {
10266 /* Strip this section if we don't need it; see the
10267 comment below. */
10268 }
10269 else if (s == htab->glink_eh_frame)
10270 {
10271 if (!bfd_is_abs_section (s->output_section))
10272 /* Not sized yet. */
10273 continue;
10274 }
10275 else if (CONST_STRNEQ (s->name, ".rela"))
10276 {
10277 if (s->size != 0)
10278 {
10279 if (s != htab->elf.srelplt)
10280 relocs = TRUE;
10281
10282 /* We use the reloc_count field as a counter if we need
10283 to copy relocs into the output file. */
10284 s->reloc_count = 0;
10285 }
10286 }
10287 else
10288 {
10289 /* It's not one of our sections, so don't allocate space. */
10290 continue;
10291 }
10292
10293 if (s->size == 0)
10294 {
10295 /* If we don't need this section, strip it from the
10296 output file. This is mostly to handle .rela.bss and
10297 .rela.plt. We must create both sections in
10298 create_dynamic_sections, because they must be created
10299 before the linker maps input sections to output
10300 sections. The linker does that before
10301 adjust_dynamic_symbol is called, and it is that
10302 function which decides whether anything needs to go
10303 into these sections. */
10304 s->flags |= SEC_EXCLUDE;
10305 continue;
10306 }
10307
10308 if ((s->flags & SEC_HAS_CONTENTS) == 0)
10309 continue;
10310
10311 /* Allocate memory for the section contents. We use bfd_zalloc
10312 here in case unused entries are not reclaimed before the
10313 section's contents are written out. This should not happen,
10314 but this way if it does we get a R_PPC64_NONE reloc in .rela
10315 sections instead of garbage.
10316 We also rely on the section contents being zero when writing
10317 the GOT and .dynrelro. */
10318 s->contents = bfd_zalloc (dynobj, s->size);
10319 if (s->contents == NULL)
10320 return FALSE;
10321 }
10322
10323 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
10324 {
10325 if (!is_ppc64_elf (ibfd))
10326 continue;
10327
10328 s = ppc64_elf_tdata (ibfd)->got;
10329 if (s != NULL && s != htab->elf.sgot)
10330 {
10331 if (s->size == 0)
10332 s->flags |= SEC_EXCLUDE;
10333 else
10334 {
10335 s->contents = bfd_zalloc (ibfd, s->size);
10336 if (s->contents == NULL)
10337 return FALSE;
10338 }
10339 }
10340 s = ppc64_elf_tdata (ibfd)->relgot;
10341 if (s != NULL)
10342 {
10343 if (s->size == 0)
10344 s->flags |= SEC_EXCLUDE;
10345 else
10346 {
10347 s->contents = bfd_zalloc (ibfd, s->size);
10348 if (s->contents == NULL)
10349 return FALSE;
10350 relocs = TRUE;
10351 s->reloc_count = 0;
10352 }
10353 }
10354 }
10355
10356 if (htab->elf.dynamic_sections_created)
10357 {
10358 bfd_boolean tls_opt;
10359
10360 /* Add some entries to the .dynamic section. We fill in the
10361 values later, in ppc64_elf_finish_dynamic_sections, but we
10362 must add the entries now so that we get the correct size for
10363 the .dynamic section. The DT_DEBUG entry is filled in by the
10364 dynamic linker and used by the debugger. */
10365 #define add_dynamic_entry(TAG, VAL) \
10366 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
10367
10368 if (bfd_link_executable (info))
10369 {
10370 if (!add_dynamic_entry (DT_DEBUG, 0))
10371 return FALSE;
10372 }
10373
10374 if (htab->elf.splt != NULL && htab->elf.splt->size != 0)
10375 {
10376 if (!add_dynamic_entry (DT_PLTGOT, 0)
10377 || !add_dynamic_entry (DT_PLTRELSZ, 0)
10378 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
10379 || !add_dynamic_entry (DT_JMPREL, 0)
10380 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
10381 return FALSE;
10382 }
10383
10384 if (NO_OPD_RELOCS && abiversion (output_bfd) <= 1)
10385 {
10386 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
10387 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
10388 return FALSE;
10389 }
10390
10391 tls_opt = (htab->params->tls_get_addr_opt
10392 && htab->tls_get_addr_fd != NULL
10393 && htab->tls_get_addr_fd->elf.plt.plist != NULL);
10394 if (tls_opt || !htab->opd_abi)
10395 {
10396 if (!add_dynamic_entry (DT_PPC64_OPT, tls_opt ? PPC64_OPT_TLS : 0))
10397 return FALSE;
10398 }
10399
10400 if (relocs)
10401 {
10402 if (!add_dynamic_entry (DT_RELA, 0)
10403 || !add_dynamic_entry (DT_RELASZ, 0)
10404 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
10405 return FALSE;
10406
10407 /* If any dynamic relocs apply to a read-only section,
10408 then we need a DT_TEXTREL entry. */
10409 if ((info->flags & DF_TEXTREL) == 0)
10410 elf_link_hash_traverse (&htab->elf, maybe_set_textrel, info);
10411
10412 if ((info->flags & DF_TEXTREL) != 0)
10413 {
10414 if (!add_dynamic_entry (DT_TEXTREL, 0))
10415 return FALSE;
10416 }
10417 }
10418 }
10419 #undef add_dynamic_entry
10420
10421 return TRUE;
10422 }
10423
10424 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
10425
10426 static bfd_boolean
10427 ppc64_elf_hash_symbol (struct elf_link_hash_entry *h)
10428 {
10429 if (h->plt.plist != NULL
10430 && !h->def_regular
10431 && !h->pointer_equality_needed)
10432 return FALSE;
10433
10434 return _bfd_elf_hash_symbol (h);
10435 }
10436
10437 /* Determine the type of stub needed, if any, for a call. */
10438
10439 static inline enum ppc_stub_type
10440 ppc_type_of_stub (asection *input_sec,
10441 const Elf_Internal_Rela *rel,
10442 struct ppc_link_hash_entry **hash,
10443 struct plt_entry **plt_ent,
10444 bfd_vma destination,
10445 unsigned long local_off)
10446 {
10447 struct ppc_link_hash_entry *h = *hash;
10448 bfd_vma location;
10449 bfd_vma branch_offset;
10450 bfd_vma max_branch_offset;
10451 enum elf_ppc64_reloc_type r_type;
10452
10453 if (h != NULL)
10454 {
10455 struct plt_entry *ent;
10456 struct ppc_link_hash_entry *fdh = h;
10457 if (h->oh != NULL
10458 && h->oh->is_func_descriptor)
10459 {
10460 fdh = ppc_follow_link (h->oh);
10461 *hash = fdh;
10462 }
10463
10464 for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next)
10465 if (ent->addend == rel->r_addend
10466 && ent->plt.offset != (bfd_vma) -1)
10467 {
10468 *plt_ent = ent;
10469 return ppc_stub_plt_call;
10470 }
10471
10472 /* Here, we know we don't have a plt entry. If we don't have a
10473 either a defined function descriptor or a defined entry symbol
10474 in a regular object file, then it is pointless trying to make
10475 any other type of stub. */
10476 if (!is_static_defined (&fdh->elf)
10477 && !is_static_defined (&h->elf))
10478 return ppc_stub_none;
10479 }
10480 else if (elf_local_got_ents (input_sec->owner) != NULL)
10481 {
10482 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (input_sec->owner);
10483 struct plt_entry **local_plt = (struct plt_entry **)
10484 elf_local_got_ents (input_sec->owner) + symtab_hdr->sh_info;
10485 unsigned long r_symndx = ELF64_R_SYM (rel->r_info);
10486
10487 if (local_plt[r_symndx] != NULL)
10488 {
10489 struct plt_entry *ent;
10490
10491 for (ent = local_plt[r_symndx]; ent != NULL; ent = ent->next)
10492 if (ent->addend == rel->r_addend
10493 && ent->plt.offset != (bfd_vma) -1)
10494 {
10495 *plt_ent = ent;
10496 return ppc_stub_plt_call;
10497 }
10498 }
10499 }
10500
10501 /* Determine where the call point is. */
10502 location = (input_sec->output_offset
10503 + input_sec->output_section->vma
10504 + rel->r_offset);
10505
10506 branch_offset = destination - location;
10507 r_type = ELF64_R_TYPE (rel->r_info);
10508
10509 /* Determine if a long branch stub is needed. */
10510 max_branch_offset = 1 << 25;
10511 if (r_type != R_PPC64_REL24)
10512 max_branch_offset = 1 << 15;
10513
10514 if (branch_offset + max_branch_offset >= 2 * max_branch_offset - local_off)
10515 /* We need a stub. Figure out whether a long_branch or plt_branch
10516 is needed later. */
10517 return ppc_stub_long_branch;
10518
10519 return ppc_stub_none;
10520 }
10521
10522 /* With power7 weakly ordered memory model, it is possible for ld.so
10523 to update a plt entry in one thread and have another thread see a
10524 stale zero toc entry. To avoid this we need some sort of acquire
10525 barrier in the call stub. One solution is to make the load of the
10526 toc word seem to appear to depend on the load of the function entry
10527 word. Another solution is to test for r2 being zero, and branch to
10528 the appropriate glink entry if so.
10529
10530 . fake dep barrier compare
10531 . ld 12,xxx(2) ld 12,xxx(2)
10532 . mtctr 12 mtctr 12
10533 . xor 11,12,12 ld 2,xxx+8(2)
10534 . add 2,2,11 cmpldi 2,0
10535 . ld 2,xxx+8(2) bnectr+
10536 . bctr b <glink_entry>
10537
10538 The solution involving the compare turns out to be faster, so
10539 that's what we use unless the branch won't reach. */
10540
10541 #define ALWAYS_USE_FAKE_DEP 0
10542 #define ALWAYS_EMIT_R2SAVE 0
10543
10544 #define PPC_LO(v) ((v) & 0xffff)
10545 #define PPC_HI(v) (((v) >> 16) & 0xffff)
10546 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
10547
10548 static inline unsigned int
10549 plt_stub_size (struct ppc_link_hash_table *htab,
10550 struct ppc_stub_hash_entry *stub_entry,
10551 bfd_vma off)
10552 {
10553 unsigned size = 12;
10554
10555 if (ALWAYS_EMIT_R2SAVE
10556 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10557 size += 4;
10558 if (PPC_HA (off) != 0)
10559 size += 4;
10560 if (htab->opd_abi)
10561 {
10562 size += 4;
10563 if (htab->params->plt_static_chain)
10564 size += 4;
10565 if (htab->params->plt_thread_safe
10566 && htab->elf.dynamic_sections_created
10567 && stub_entry->h != NULL
10568 && stub_entry->h->elf.dynindx != -1)
10569 size += 8;
10570 if (PPC_HA (off + 8 + 8 * htab->params->plt_static_chain) != PPC_HA (off))
10571 size += 4;
10572 }
10573 if (stub_entry->h != NULL
10574 && (stub_entry->h == htab->tls_get_addr_fd
10575 || stub_entry->h == htab->tls_get_addr)
10576 && htab->params->tls_get_addr_opt)
10577 {
10578 size += 7 * 4;
10579 if (ALWAYS_EMIT_R2SAVE
10580 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10581 size += 6 * 4;
10582 }
10583 return size;
10584 }
10585
10586 /* If this stub would cross fewer 2**plt_stub_align boundaries if we align,
10587 then return the padding needed to do so. */
10588 static inline unsigned int
10589 plt_stub_pad (struct ppc_link_hash_table *htab,
10590 struct ppc_stub_hash_entry *stub_entry,
10591 bfd_vma plt_off)
10592 {
10593 int stub_align = 1 << htab->params->plt_stub_align;
10594 unsigned stub_size = plt_stub_size (htab, stub_entry, plt_off);
10595 bfd_vma stub_off = stub_entry->group->stub_sec->size;
10596
10597 if (((stub_off + stub_size - 1) & -stub_align) - (stub_off & -stub_align)
10598 > ((stub_size - 1) & -stub_align))
10599 return stub_align - (stub_off & (stub_align - 1));
10600 return 0;
10601 }
10602
10603 /* Build a .plt call stub. */
10604
10605 static inline bfd_byte *
10606 build_plt_stub (struct ppc_link_hash_table *htab,
10607 struct ppc_stub_hash_entry *stub_entry,
10608 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
10609 {
10610 bfd *obfd = htab->params->stub_bfd;
10611 bfd_boolean plt_load_toc = htab->opd_abi;
10612 bfd_boolean plt_static_chain = htab->params->plt_static_chain;
10613 bfd_boolean plt_thread_safe = (htab->params->plt_thread_safe
10614 && htab->elf.dynamic_sections_created
10615 && stub_entry->h != NULL
10616 && stub_entry->h->elf.dynindx != -1);
10617 bfd_boolean use_fake_dep = plt_thread_safe;
10618 bfd_vma cmp_branch_off = 0;
10619
10620 if (!ALWAYS_USE_FAKE_DEP
10621 && plt_load_toc
10622 && plt_thread_safe
10623 && !((stub_entry->h == htab->tls_get_addr_fd
10624 || stub_entry->h == htab->tls_get_addr)
10625 && htab->params->tls_get_addr_opt))
10626 {
10627 bfd_vma pltoff = stub_entry->plt_ent->plt.offset & ~1;
10628 bfd_vma pltindex = ((pltoff - PLT_INITIAL_ENTRY_SIZE (htab))
10629 / PLT_ENTRY_SIZE (htab));
10630 bfd_vma glinkoff = GLINK_CALL_STUB_SIZE + pltindex * 8;
10631 bfd_vma to, from;
10632
10633 if (pltindex > 32768)
10634 glinkoff += (pltindex - 32768) * 4;
10635 to = (glinkoff
10636 + htab->glink->output_offset
10637 + htab->glink->output_section->vma);
10638 from = (p - stub_entry->group->stub_sec->contents
10639 + 4 * (ALWAYS_EMIT_R2SAVE
10640 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10641 + 4 * (PPC_HA (offset) != 0)
10642 + 4 * (PPC_HA (offset + 8 + 8 * plt_static_chain)
10643 != PPC_HA (offset))
10644 + 4 * (plt_static_chain != 0)
10645 + 20
10646 + stub_entry->group->stub_sec->output_offset
10647 + stub_entry->group->stub_sec->output_section->vma);
10648 cmp_branch_off = to - from;
10649 use_fake_dep = cmp_branch_off + (1 << 25) >= (1 << 26);
10650 }
10651
10652 if (PPC_HA (offset) != 0)
10653 {
10654 if (r != NULL)
10655 {
10656 if (ALWAYS_EMIT_R2SAVE
10657 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10658 r[0].r_offset += 4;
10659 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
10660 r[1].r_offset = r[0].r_offset + 4;
10661 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10662 r[1].r_addend = r[0].r_addend;
10663 if (plt_load_toc)
10664 {
10665 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10666 {
10667 r[2].r_offset = r[1].r_offset + 4;
10668 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO);
10669 r[2].r_addend = r[0].r_addend;
10670 }
10671 else
10672 {
10673 r[2].r_offset = r[1].r_offset + 8 + 8 * use_fake_dep;
10674 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10675 r[2].r_addend = r[0].r_addend + 8;
10676 if (plt_static_chain)
10677 {
10678 r[3].r_offset = r[2].r_offset + 4;
10679 r[3].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10680 r[3].r_addend = r[0].r_addend + 16;
10681 }
10682 }
10683 }
10684 }
10685 if (ALWAYS_EMIT_R2SAVE
10686 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10687 bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p), p += 4;
10688 if (plt_load_toc)
10689 {
10690 bfd_put_32 (obfd, ADDIS_R11_R2 | PPC_HA (offset), p), p += 4;
10691 bfd_put_32 (obfd, LD_R12_0R11 | PPC_LO (offset), p), p += 4;
10692 }
10693 else
10694 {
10695 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
10696 bfd_put_32 (obfd, LD_R12_0R12 | PPC_LO (offset), p), p += 4;
10697 }
10698 if (plt_load_toc
10699 && PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10700 {
10701 bfd_put_32 (obfd, ADDI_R11_R11 | PPC_LO (offset), p), p += 4;
10702 offset = 0;
10703 }
10704 bfd_put_32 (obfd, MTCTR_R12, p), p += 4;
10705 if (plt_load_toc)
10706 {
10707 if (use_fake_dep)
10708 {
10709 bfd_put_32 (obfd, XOR_R2_R12_R12, p), p += 4;
10710 bfd_put_32 (obfd, ADD_R11_R11_R2, p), p += 4;
10711 }
10712 bfd_put_32 (obfd, LD_R2_0R11 | PPC_LO (offset + 8), p), p += 4;
10713 if (plt_static_chain)
10714 bfd_put_32 (obfd, LD_R11_0R11 | PPC_LO (offset + 16), p), p += 4;
10715 }
10716 }
10717 else
10718 {
10719 if (r != NULL)
10720 {
10721 if (ALWAYS_EMIT_R2SAVE
10722 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10723 r[0].r_offset += 4;
10724 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10725 if (plt_load_toc)
10726 {
10727 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10728 {
10729 r[1].r_offset = r[0].r_offset + 4;
10730 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16);
10731 r[1].r_addend = r[0].r_addend;
10732 }
10733 else
10734 {
10735 r[1].r_offset = r[0].r_offset + 8 + 8 * use_fake_dep;
10736 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10737 r[1].r_addend = r[0].r_addend + 8 + 8 * plt_static_chain;
10738 if (plt_static_chain)
10739 {
10740 r[2].r_offset = r[1].r_offset + 4;
10741 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10742 r[2].r_addend = r[0].r_addend + 8;
10743 }
10744 }
10745 }
10746 }
10747 if (ALWAYS_EMIT_R2SAVE
10748 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10749 bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p), p += 4;
10750 bfd_put_32 (obfd, LD_R12_0R2 | PPC_LO (offset), p), p += 4;
10751 if (plt_load_toc
10752 && PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10753 {
10754 bfd_put_32 (obfd, ADDI_R2_R2 | PPC_LO (offset), p), p += 4;
10755 offset = 0;
10756 }
10757 bfd_put_32 (obfd, MTCTR_R12, p), p += 4;
10758 if (plt_load_toc)
10759 {
10760 if (use_fake_dep)
10761 {
10762 bfd_put_32 (obfd, XOR_R11_R12_R12, p), p += 4;
10763 bfd_put_32 (obfd, ADD_R2_R2_R11, p), p += 4;
10764 }
10765 if (plt_static_chain)
10766 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset + 16), p), p += 4;
10767 bfd_put_32 (obfd, LD_R2_0R2 | PPC_LO (offset + 8), p), p += 4;
10768 }
10769 }
10770 if (plt_load_toc && plt_thread_safe && !use_fake_dep)
10771 {
10772 bfd_put_32 (obfd, CMPLDI_R2_0, p), p += 4;
10773 bfd_put_32 (obfd, BNECTR_P4, p), p += 4;
10774 bfd_put_32 (obfd, B_DOT | (cmp_branch_off & 0x3fffffc), p), p += 4;
10775 }
10776 else
10777 bfd_put_32 (obfd, BCTR, p), p += 4;
10778 return p;
10779 }
10780
10781 /* Build a special .plt call stub for __tls_get_addr. */
10782
10783 #define LD_R11_0R3 0xe9630000
10784 #define LD_R12_0R3 0xe9830000
10785 #define MR_R0_R3 0x7c601b78
10786 #define CMPDI_R11_0 0x2c2b0000
10787 #define ADD_R3_R12_R13 0x7c6c6a14
10788 #define BEQLR 0x4d820020
10789 #define MR_R3_R0 0x7c030378
10790 #define STD_R11_0R1 0xf9610000
10791 #define BCTRL 0x4e800421
10792 #define LD_R11_0R1 0xe9610000
10793 #define MTLR_R11 0x7d6803a6
10794
10795 static inline bfd_byte *
10796 build_tls_get_addr_stub (struct ppc_link_hash_table *htab,
10797 struct ppc_stub_hash_entry *stub_entry,
10798 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
10799 {
10800 bfd *obfd = htab->params->stub_bfd;
10801
10802 bfd_put_32 (obfd, LD_R11_0R3 + 0, p), p += 4;
10803 bfd_put_32 (obfd, LD_R12_0R3 + 8, p), p += 4;
10804 bfd_put_32 (obfd, MR_R0_R3, p), p += 4;
10805 bfd_put_32 (obfd, CMPDI_R11_0, p), p += 4;
10806 bfd_put_32 (obfd, ADD_R3_R12_R13, p), p += 4;
10807 bfd_put_32 (obfd, BEQLR, p), p += 4;
10808 bfd_put_32 (obfd, MR_R3_R0, p), p += 4;
10809 if (r != NULL)
10810 r[0].r_offset += 7 * 4;
10811 if (!ALWAYS_EMIT_R2SAVE
10812 && stub_entry->stub_type != ppc_stub_plt_call_r2save)
10813 return build_plt_stub (htab, stub_entry, p, offset, r);
10814
10815 bfd_put_32 (obfd, MFLR_R11, p), p += 4;
10816 bfd_put_32 (obfd, STD_R11_0R1 + STK_LINKER (htab), p), p += 4;
10817
10818 if (r != NULL)
10819 r[0].r_offset += 2 * 4;
10820 p = build_plt_stub (htab, stub_entry, p, offset, r);
10821 bfd_put_32 (obfd, BCTRL, p - 4);
10822
10823 bfd_put_32 (obfd, LD_R2_0R1 + STK_TOC (htab), p), p += 4;
10824 bfd_put_32 (obfd, LD_R11_0R1 + STK_LINKER (htab), p), p += 4;
10825 bfd_put_32 (obfd, MTLR_R11, p), p += 4;
10826 bfd_put_32 (obfd, BLR, p), p += 4;
10827
10828 return p;
10829 }
10830
10831 static Elf_Internal_Rela *
10832 get_relocs (asection *sec, int count)
10833 {
10834 Elf_Internal_Rela *relocs;
10835 struct bfd_elf_section_data *elfsec_data;
10836
10837 elfsec_data = elf_section_data (sec);
10838 relocs = elfsec_data->relocs;
10839 if (relocs == NULL)
10840 {
10841 bfd_size_type relsize;
10842 relsize = sec->reloc_count * sizeof (*relocs);
10843 relocs = bfd_alloc (sec->owner, relsize);
10844 if (relocs == NULL)
10845 return NULL;
10846 elfsec_data->relocs = relocs;
10847 elfsec_data->rela.hdr = bfd_zalloc (sec->owner,
10848 sizeof (Elf_Internal_Shdr));
10849 if (elfsec_data->rela.hdr == NULL)
10850 return NULL;
10851 elfsec_data->rela.hdr->sh_size = (sec->reloc_count
10852 * sizeof (Elf64_External_Rela));
10853 elfsec_data->rela.hdr->sh_entsize = sizeof (Elf64_External_Rela);
10854 sec->reloc_count = 0;
10855 }
10856 relocs += sec->reloc_count;
10857 sec->reloc_count += count;
10858 return relocs;
10859 }
10860
10861 static bfd_vma
10862 get_r2off (struct bfd_link_info *info,
10863 struct ppc_stub_hash_entry *stub_entry)
10864 {
10865 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10866 bfd_vma r2off = htab->sec_info[stub_entry->target_section->id].toc_off;
10867
10868 if (r2off == 0)
10869 {
10870 /* Support linking -R objects. Get the toc pointer from the
10871 opd entry. */
10872 char buf[8];
10873 if (!htab->opd_abi)
10874 return r2off;
10875 asection *opd = stub_entry->h->elf.root.u.def.section;
10876 bfd_vma opd_off = stub_entry->h->elf.root.u.def.value;
10877
10878 if (strcmp (opd->name, ".opd") != 0
10879 || opd->reloc_count != 0)
10880 {
10881 info->callbacks->einfo (_("%P: cannot find opd entry toc for `%T'\n"),
10882 stub_entry->h->elf.root.root.string);
10883 bfd_set_error (bfd_error_bad_value);
10884 return (bfd_vma) -1;
10885 }
10886 if (!bfd_get_section_contents (opd->owner, opd, buf, opd_off + 8, 8))
10887 return (bfd_vma) -1;
10888 r2off = bfd_get_64 (opd->owner, buf);
10889 r2off -= elf_gp (info->output_bfd);
10890 }
10891 r2off -= htab->sec_info[stub_entry->group->link_sec->id].toc_off;
10892 return r2off;
10893 }
10894
10895 static bfd_boolean
10896 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
10897 {
10898 struct ppc_stub_hash_entry *stub_entry;
10899 struct ppc_branch_hash_entry *br_entry;
10900 struct bfd_link_info *info;
10901 struct ppc_link_hash_table *htab;
10902 bfd_byte *loc;
10903 bfd_byte *p;
10904 bfd_vma dest, off;
10905 int size;
10906 Elf_Internal_Rela *r;
10907 asection *plt;
10908
10909 /* Massage our args to the form they really have. */
10910 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
10911 info = in_arg;
10912
10913 htab = ppc_hash_table (info);
10914 if (htab == NULL)
10915 return FALSE;
10916
10917 /* Make a note of the offset within the stubs for this entry. */
10918 stub_entry->stub_offset = stub_entry->group->stub_sec->size;
10919 loc = stub_entry->group->stub_sec->contents + stub_entry->stub_offset;
10920
10921 htab->stub_count[stub_entry->stub_type - 1] += 1;
10922 switch (stub_entry->stub_type)
10923 {
10924 case ppc_stub_long_branch:
10925 case ppc_stub_long_branch_r2off:
10926 /* Branches are relative. This is where we are going to. */
10927 dest = (stub_entry->target_value
10928 + stub_entry->target_section->output_offset
10929 + stub_entry->target_section->output_section->vma);
10930 dest += PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
10931 off = dest;
10932
10933 /* And this is where we are coming from. */
10934 off -= (stub_entry->stub_offset
10935 + stub_entry->group->stub_sec->output_offset
10936 + stub_entry->group->stub_sec->output_section->vma);
10937
10938 size = 4;
10939 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
10940 {
10941 bfd_vma r2off = get_r2off (info, stub_entry);
10942
10943 if (r2off == (bfd_vma) -1)
10944 {
10945 htab->stub_error = TRUE;
10946 return FALSE;
10947 }
10948 bfd_put_32 (htab->params->stub_bfd, STD_R2_0R1 + STK_TOC (htab), loc);
10949 loc += 4;
10950 size = 8;
10951 if (PPC_HA (r2off) != 0)
10952 {
10953 bfd_put_32 (htab->params->stub_bfd,
10954 ADDIS_R2_R2 | PPC_HA (r2off), loc);
10955 loc += 4;
10956 size += 4;
10957 }
10958 if (PPC_LO (r2off) != 0)
10959 {
10960 bfd_put_32 (htab->params->stub_bfd,
10961 ADDI_R2_R2 | PPC_LO (r2off), loc);
10962 loc += 4;
10963 size += 4;
10964 }
10965 off -= size - 4;
10966 }
10967 bfd_put_32 (htab->params->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
10968
10969 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
10970 {
10971 info->callbacks->einfo
10972 (_("%P: long branch stub `%s' offset overflow\n"),
10973 stub_entry->root.string);
10974 htab->stub_error = TRUE;
10975 return FALSE;
10976 }
10977
10978 if (info->emitrelocations)
10979 {
10980 r = get_relocs (stub_entry->group->stub_sec, 1);
10981 if (r == NULL)
10982 return FALSE;
10983 r->r_offset = loc - stub_entry->group->stub_sec->contents;
10984 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
10985 r->r_addend = dest;
10986 if (stub_entry->h != NULL)
10987 {
10988 struct elf_link_hash_entry **hashes;
10989 unsigned long symndx;
10990 struct ppc_link_hash_entry *h;
10991
10992 hashes = elf_sym_hashes (htab->params->stub_bfd);
10993 if (hashes == NULL)
10994 {
10995 bfd_size_type hsize;
10996
10997 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
10998 hashes = bfd_zalloc (htab->params->stub_bfd, hsize);
10999 if (hashes == NULL)
11000 return FALSE;
11001 elf_sym_hashes (htab->params->stub_bfd) = hashes;
11002 htab->stub_globals = 1;
11003 }
11004 symndx = htab->stub_globals++;
11005 h = stub_entry->h;
11006 hashes[symndx] = &h->elf;
11007 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
11008 if (h->oh != NULL && h->oh->is_func)
11009 h = ppc_follow_link (h->oh);
11010 if (h->elf.root.u.def.section != stub_entry->target_section)
11011 /* H is an opd symbol. The addend must be zero. */
11012 r->r_addend = 0;
11013 else
11014 {
11015 off = (h->elf.root.u.def.value
11016 + h->elf.root.u.def.section->output_offset
11017 + h->elf.root.u.def.section->output_section->vma);
11018 r->r_addend -= off;
11019 }
11020 }
11021 }
11022 break;
11023
11024 case ppc_stub_plt_branch:
11025 case ppc_stub_plt_branch_r2off:
11026 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
11027 stub_entry->root.string + 9,
11028 FALSE, FALSE);
11029 if (br_entry == NULL)
11030 {
11031 info->callbacks->einfo (_("%P: can't find branch stub `%s'\n"),
11032 stub_entry->root.string);
11033 htab->stub_error = TRUE;
11034 return FALSE;
11035 }
11036
11037 dest = (stub_entry->target_value
11038 + stub_entry->target_section->output_offset
11039 + stub_entry->target_section->output_section->vma);
11040 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
11041 dest += PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
11042
11043 bfd_put_64 (htab->brlt->owner, dest,
11044 htab->brlt->contents + br_entry->offset);
11045
11046 if (br_entry->iter == htab->stub_iteration)
11047 {
11048 br_entry->iter = 0;
11049
11050 if (htab->relbrlt != NULL)
11051 {
11052 /* Create a reloc for the branch lookup table entry. */
11053 Elf_Internal_Rela rela;
11054 bfd_byte *rl;
11055
11056 rela.r_offset = (br_entry->offset
11057 + htab->brlt->output_offset
11058 + htab->brlt->output_section->vma);
11059 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
11060 rela.r_addend = dest;
11061
11062 rl = htab->relbrlt->contents;
11063 rl += (htab->relbrlt->reloc_count++
11064 * sizeof (Elf64_External_Rela));
11065 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
11066 }
11067 else if (info->emitrelocations)
11068 {
11069 r = get_relocs (htab->brlt, 1);
11070 if (r == NULL)
11071 return FALSE;
11072 /* brlt, being SEC_LINKER_CREATED does not go through the
11073 normal reloc processing. Symbols and offsets are not
11074 translated from input file to output file form, so
11075 set up the offset per the output file. */
11076 r->r_offset = (br_entry->offset
11077 + htab->brlt->output_offset
11078 + htab->brlt->output_section->vma);
11079 r->r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
11080 r->r_addend = dest;
11081 }
11082 }
11083
11084 dest = (br_entry->offset
11085 + htab->brlt->output_offset
11086 + htab->brlt->output_section->vma);
11087
11088 off = (dest
11089 - elf_gp (htab->brlt->output_section->owner)
11090 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11091
11092 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
11093 {
11094 info->callbacks->einfo
11095 (_("%P: linkage table error against `%T'\n"),
11096 stub_entry->root.string);
11097 bfd_set_error (bfd_error_bad_value);
11098 htab->stub_error = TRUE;
11099 return FALSE;
11100 }
11101
11102 if (info->emitrelocations)
11103 {
11104 r = get_relocs (stub_entry->group->stub_sec, 1 + (PPC_HA (off) != 0));
11105 if (r == NULL)
11106 return FALSE;
11107 r[0].r_offset = loc - stub_entry->group->stub_sec->contents;
11108 if (bfd_big_endian (info->output_bfd))
11109 r[0].r_offset += 2;
11110 if (stub_entry->stub_type == ppc_stub_plt_branch_r2off)
11111 r[0].r_offset += 4;
11112 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
11113 r[0].r_addend = dest;
11114 if (PPC_HA (off) != 0)
11115 {
11116 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
11117 r[1].r_offset = r[0].r_offset + 4;
11118 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
11119 r[1].r_addend = r[0].r_addend;
11120 }
11121 }
11122
11123 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
11124 {
11125 if (PPC_HA (off) != 0)
11126 {
11127 size = 16;
11128 bfd_put_32 (htab->params->stub_bfd,
11129 ADDIS_R12_R2 | PPC_HA (off), loc);
11130 loc += 4;
11131 bfd_put_32 (htab->params->stub_bfd,
11132 LD_R12_0R12 | PPC_LO (off), loc);
11133 }
11134 else
11135 {
11136 size = 12;
11137 bfd_put_32 (htab->params->stub_bfd,
11138 LD_R12_0R2 | PPC_LO (off), loc);
11139 }
11140 }
11141 else
11142 {
11143 bfd_vma r2off = get_r2off (info, stub_entry);
11144
11145 if (r2off == (bfd_vma) -1)
11146 {
11147 htab->stub_error = TRUE;
11148 return FALSE;
11149 }
11150
11151 bfd_put_32 (htab->params->stub_bfd, STD_R2_0R1 + STK_TOC (htab), loc);
11152 loc += 4;
11153 size = 16;
11154 if (PPC_HA (off) != 0)
11155 {
11156 size += 4;
11157 bfd_put_32 (htab->params->stub_bfd,
11158 ADDIS_R12_R2 | PPC_HA (off), loc);
11159 loc += 4;
11160 bfd_put_32 (htab->params->stub_bfd,
11161 LD_R12_0R12 | PPC_LO (off), loc);
11162 }
11163 else
11164 bfd_put_32 (htab->params->stub_bfd, LD_R12_0R2 | PPC_LO (off), loc);
11165
11166 if (PPC_HA (r2off) != 0)
11167 {
11168 size += 4;
11169 loc += 4;
11170 bfd_put_32 (htab->params->stub_bfd,
11171 ADDIS_R2_R2 | PPC_HA (r2off), loc);
11172 }
11173 if (PPC_LO (r2off) != 0)
11174 {
11175 size += 4;
11176 loc += 4;
11177 bfd_put_32 (htab->params->stub_bfd,
11178 ADDI_R2_R2 | PPC_LO (r2off), loc);
11179 }
11180 }
11181 loc += 4;
11182 bfd_put_32 (htab->params->stub_bfd, MTCTR_R12, loc);
11183 loc += 4;
11184 bfd_put_32 (htab->params->stub_bfd, BCTR, loc);
11185 break;
11186
11187 case ppc_stub_plt_call:
11188 case ppc_stub_plt_call_r2save:
11189 if (stub_entry->h != NULL
11190 && stub_entry->h->is_func_descriptor
11191 && stub_entry->h->oh != NULL)
11192 {
11193 struct ppc_link_hash_entry *fh = ppc_follow_link (stub_entry->h->oh);
11194
11195 /* If the old-ABI "dot-symbol" is undefined make it weak so
11196 we don't get a link error from RELOC_FOR_GLOBAL_SYMBOL. */
11197 if (fh->elf.root.type == bfd_link_hash_undefined
11198 && (stub_entry->h->elf.root.type == bfd_link_hash_defined
11199 || stub_entry->h->elf.root.type == bfd_link_hash_defweak))
11200 fh->elf.root.type = bfd_link_hash_undefweak;
11201 }
11202
11203 /* Now build the stub. */
11204 dest = stub_entry->plt_ent->plt.offset & ~1;
11205 if (dest >= (bfd_vma) -2)
11206 abort ();
11207
11208 plt = htab->elf.splt;
11209 if (!htab->elf.dynamic_sections_created
11210 || stub_entry->h == NULL
11211 || stub_entry->h->elf.dynindx == -1)
11212 plt = htab->elf.iplt;
11213
11214 dest += plt->output_offset + plt->output_section->vma;
11215
11216 if (stub_entry->h == NULL
11217 && (stub_entry->plt_ent->plt.offset & 1) == 0)
11218 {
11219 Elf_Internal_Rela rela;
11220 bfd_byte *rl;
11221
11222 rela.r_offset = dest;
11223 if (htab->opd_abi)
11224 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
11225 else
11226 rela.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
11227 rela.r_addend = (stub_entry->target_value
11228 + stub_entry->target_section->output_offset
11229 + stub_entry->target_section->output_section->vma);
11230
11231 rl = (htab->elf.irelplt->contents
11232 + (htab->elf.irelplt->reloc_count++
11233 * sizeof (Elf64_External_Rela)));
11234 bfd_elf64_swap_reloca_out (info->output_bfd, &rela, rl);
11235 stub_entry->plt_ent->plt.offset |= 1;
11236 htab->local_ifunc_resolver = 1;
11237 }
11238
11239 off = (dest
11240 - elf_gp (plt->output_section->owner)
11241 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11242
11243 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
11244 {
11245 info->callbacks->einfo
11246 /* xgettext:c-format */
11247 (_("%P: linkage table error against `%T'\n"),
11248 stub_entry->h != NULL
11249 ? stub_entry->h->elf.root.root.string
11250 : "<local sym>");
11251 bfd_set_error (bfd_error_bad_value);
11252 htab->stub_error = TRUE;
11253 return FALSE;
11254 }
11255
11256 if (htab->params->plt_stub_align != 0)
11257 {
11258 unsigned pad = plt_stub_pad (htab, stub_entry, off);
11259
11260 stub_entry->group->stub_sec->size += pad;
11261 stub_entry->stub_offset = stub_entry->group->stub_sec->size;
11262 loc += pad;
11263 }
11264
11265 r = NULL;
11266 if (info->emitrelocations)
11267 {
11268 r = get_relocs (stub_entry->group->stub_sec,
11269 ((PPC_HA (off) != 0)
11270 + (htab->opd_abi
11271 ? 2 + (htab->params->plt_static_chain
11272 && PPC_HA (off + 16) == PPC_HA (off))
11273 : 1)));
11274 if (r == NULL)
11275 return FALSE;
11276 r[0].r_offset = loc - stub_entry->group->stub_sec->contents;
11277 if (bfd_big_endian (info->output_bfd))
11278 r[0].r_offset += 2;
11279 r[0].r_addend = dest;
11280 }
11281 if (stub_entry->h != NULL
11282 && (stub_entry->h == htab->tls_get_addr_fd
11283 || stub_entry->h == htab->tls_get_addr)
11284 && htab->params->tls_get_addr_opt)
11285 p = build_tls_get_addr_stub (htab, stub_entry, loc, off, r);
11286 else
11287 p = build_plt_stub (htab, stub_entry, loc, off, r);
11288 size = p - loc;
11289 break;
11290
11291 case ppc_stub_save_res:
11292 return TRUE;
11293
11294 default:
11295 BFD_FAIL ();
11296 return FALSE;
11297 }
11298
11299 stub_entry->group->stub_sec->size += size;
11300
11301 if (htab->params->emit_stub_syms)
11302 {
11303 struct elf_link_hash_entry *h;
11304 size_t len1, len2;
11305 char *name;
11306 const char *const stub_str[] = { "long_branch",
11307 "long_branch_r2off",
11308 "plt_branch",
11309 "plt_branch_r2off",
11310 "plt_call",
11311 "plt_call" };
11312
11313 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
11314 len2 = strlen (stub_entry->root.string);
11315 name = bfd_malloc (len1 + len2 + 2);
11316 if (name == NULL)
11317 return FALSE;
11318 memcpy (name, stub_entry->root.string, 9);
11319 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
11320 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
11321 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
11322 if (h == NULL)
11323 return FALSE;
11324 if (h->root.type == bfd_link_hash_new)
11325 {
11326 h->root.type = bfd_link_hash_defined;
11327 h->root.u.def.section = stub_entry->group->stub_sec;
11328 h->root.u.def.value = stub_entry->stub_offset;
11329 h->ref_regular = 1;
11330 h->def_regular = 1;
11331 h->ref_regular_nonweak = 1;
11332 h->forced_local = 1;
11333 h->non_elf = 0;
11334 h->root.linker_def = 1;
11335 }
11336 }
11337
11338 return TRUE;
11339 }
11340
11341 /* As above, but don't actually build the stub. Just bump offset so
11342 we know stub section sizes, and select plt_branch stubs where
11343 long_branch stubs won't do. */
11344
11345 static bfd_boolean
11346 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
11347 {
11348 struct ppc_stub_hash_entry *stub_entry;
11349 struct bfd_link_info *info;
11350 struct ppc_link_hash_table *htab;
11351 bfd_vma off;
11352 int size;
11353
11354 /* Massage our args to the form they really have. */
11355 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
11356 info = in_arg;
11357
11358 htab = ppc_hash_table (info);
11359 if (htab == NULL)
11360 return FALSE;
11361
11362 if (stub_entry->h != NULL
11363 && stub_entry->h->save_res
11364 && stub_entry->h->elf.root.type == bfd_link_hash_defined
11365 && stub_entry->h->elf.root.u.def.section == htab->sfpr)
11366 {
11367 /* Don't make stubs to out-of-line register save/restore
11368 functions. Instead, emit copies of the functions. */
11369 stub_entry->group->needs_save_res = 1;
11370 stub_entry->stub_type = ppc_stub_save_res;
11371 return TRUE;
11372 }
11373
11374 if (stub_entry->stub_type == ppc_stub_plt_call
11375 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
11376 {
11377 asection *plt;
11378 off = stub_entry->plt_ent->plt.offset & ~(bfd_vma) 1;
11379 if (off >= (bfd_vma) -2)
11380 abort ();
11381 plt = htab->elf.splt;
11382 if (!htab->elf.dynamic_sections_created
11383 || stub_entry->h == NULL
11384 || stub_entry->h->elf.dynindx == -1)
11385 plt = htab->elf.iplt;
11386 off += (plt->output_offset
11387 + plt->output_section->vma
11388 - elf_gp (plt->output_section->owner)
11389 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11390
11391 size = plt_stub_size (htab, stub_entry, off);
11392 if (stub_entry->h != NULL
11393 && (stub_entry->h == htab->tls_get_addr_fd
11394 || stub_entry->h == htab->tls_get_addr)
11395 && htab->params->tls_get_addr_opt
11396 && (ALWAYS_EMIT_R2SAVE
11397 || stub_entry->stub_type == ppc_stub_plt_call_r2save))
11398 stub_entry->group->tls_get_addr_opt_bctrl
11399 = stub_entry->group->stub_sec->size + size - 5 * 4;
11400
11401 if (htab->params->plt_stub_align)
11402 size += plt_stub_pad (htab, stub_entry, off);
11403 if (info->emitrelocations)
11404 {
11405 stub_entry->group->stub_sec->reloc_count
11406 += ((PPC_HA (off) != 0)
11407 + (htab->opd_abi
11408 ? 2 + (htab->params->plt_static_chain
11409 && PPC_HA (off + 16) == PPC_HA (off))
11410 : 1));
11411 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11412 }
11413 }
11414 else
11415 {
11416 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
11417 variants. */
11418 bfd_vma r2off = 0;
11419 bfd_vma local_off = 0;
11420
11421 off = (stub_entry->target_value
11422 + stub_entry->target_section->output_offset
11423 + stub_entry->target_section->output_section->vma);
11424 off -= (stub_entry->group->stub_sec->size
11425 + stub_entry->group->stub_sec->output_offset
11426 + stub_entry->group->stub_sec->output_section->vma);
11427
11428 /* Reset the stub type from the plt variant in case we now
11429 can reach with a shorter stub. */
11430 if (stub_entry->stub_type >= ppc_stub_plt_branch)
11431 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
11432
11433 size = 4;
11434 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
11435 {
11436 r2off = get_r2off (info, stub_entry);
11437 if (r2off == (bfd_vma) -1)
11438 {
11439 htab->stub_error = TRUE;
11440 return FALSE;
11441 }
11442 size = 8;
11443 if (PPC_HA (r2off) != 0)
11444 size += 4;
11445 if (PPC_LO (r2off) != 0)
11446 size += 4;
11447 off -= size - 4;
11448 }
11449
11450 local_off = PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
11451
11452 /* If the branch offset if too big, use a ppc_stub_plt_branch.
11453 Do the same for -R objects without function descriptors. */
11454 if (off + (1 << 25) >= (bfd_vma) (1 << 26) - local_off
11455 || (stub_entry->stub_type == ppc_stub_long_branch_r2off
11456 && r2off == 0
11457 && htab->sec_info[stub_entry->target_section->id].toc_off == 0))
11458 {
11459 struct ppc_branch_hash_entry *br_entry;
11460
11461 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
11462 stub_entry->root.string + 9,
11463 TRUE, FALSE);
11464 if (br_entry == NULL)
11465 {
11466 info->callbacks->einfo (_("%P: can't build branch stub `%s'\n"),
11467 stub_entry->root.string);
11468 htab->stub_error = TRUE;
11469 return FALSE;
11470 }
11471
11472 if (br_entry->iter != htab->stub_iteration)
11473 {
11474 br_entry->iter = htab->stub_iteration;
11475 br_entry->offset = htab->brlt->size;
11476 htab->brlt->size += 8;
11477
11478 if (htab->relbrlt != NULL)
11479 htab->relbrlt->size += sizeof (Elf64_External_Rela);
11480 else if (info->emitrelocations)
11481 {
11482 htab->brlt->reloc_count += 1;
11483 htab->brlt->flags |= SEC_RELOC;
11484 }
11485 }
11486
11487 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
11488 off = (br_entry->offset
11489 + htab->brlt->output_offset
11490 + htab->brlt->output_section->vma
11491 - elf_gp (htab->brlt->output_section->owner)
11492 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11493
11494 if (info->emitrelocations)
11495 {
11496 stub_entry->group->stub_sec->reloc_count
11497 += 1 + (PPC_HA (off) != 0);
11498 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11499 }
11500
11501 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
11502 {
11503 size = 12;
11504 if (PPC_HA (off) != 0)
11505 size = 16;
11506 }
11507 else
11508 {
11509 size = 16;
11510 if (PPC_HA (off) != 0)
11511 size += 4;
11512
11513 if (PPC_HA (r2off) != 0)
11514 size += 4;
11515 if (PPC_LO (r2off) != 0)
11516 size += 4;
11517 }
11518 }
11519 else if (info->emitrelocations)
11520 {
11521 stub_entry->group->stub_sec->reloc_count += 1;
11522 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11523 }
11524 }
11525
11526 stub_entry->group->stub_sec->size += size;
11527 return TRUE;
11528 }
11529
11530 /* Set up various things so that we can make a list of input sections
11531 for each output section included in the link. Returns -1 on error,
11532 0 when no stubs will be needed, and 1 on success. */
11533
11534 int
11535 ppc64_elf_setup_section_lists (struct bfd_link_info *info)
11536 {
11537 unsigned int id;
11538 bfd_size_type amt;
11539 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11540
11541 if (htab == NULL)
11542 return -1;
11543
11544 htab->sec_info_arr_size = bfd_get_next_section_id ();
11545 amt = sizeof (*htab->sec_info) * (htab->sec_info_arr_size);
11546 htab->sec_info = bfd_zmalloc (amt);
11547 if (htab->sec_info == NULL)
11548 return -1;
11549
11550 /* Set toc_off for com, und, abs and ind sections. */
11551 for (id = 0; id < 3; id++)
11552 htab->sec_info[id].toc_off = TOC_BASE_OFF;
11553
11554 return 1;
11555 }
11556
11557 /* Set up for first pass at multitoc partitioning. */
11558
11559 void
11560 ppc64_elf_start_multitoc_partition (struct bfd_link_info *info)
11561 {
11562 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11563
11564 htab->toc_curr = ppc64_elf_set_toc (info, info->output_bfd);
11565 htab->toc_bfd = NULL;
11566 htab->toc_first_sec = NULL;
11567 }
11568
11569 /* The linker repeatedly calls this function for each TOC input section
11570 and linker generated GOT section. Group input bfds such that the toc
11571 within a group is less than 64k in size. */
11572
11573 bfd_boolean
11574 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
11575 {
11576 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11577 bfd_vma addr, off, limit;
11578
11579 if (htab == NULL)
11580 return FALSE;
11581
11582 if (!htab->second_toc_pass)
11583 {
11584 /* Keep track of the first .toc or .got section for this input bfd. */
11585 bfd_boolean new_bfd = htab->toc_bfd != isec->owner;
11586
11587 if (new_bfd)
11588 {
11589 htab->toc_bfd = isec->owner;
11590 htab->toc_first_sec = isec;
11591 }
11592
11593 addr = isec->output_offset + isec->output_section->vma;
11594 off = addr - htab->toc_curr;
11595 limit = 0x80008000;
11596 if (ppc64_elf_tdata (isec->owner)->has_small_toc_reloc)
11597 limit = 0x10000;
11598 if (off + isec->size > limit)
11599 {
11600 addr = (htab->toc_first_sec->output_offset
11601 + htab->toc_first_sec->output_section->vma);
11602 htab->toc_curr = addr;
11603 htab->toc_curr &= -TOC_BASE_ALIGN;
11604 }
11605
11606 /* toc_curr is the base address of this toc group. Set elf_gp
11607 for the input section to be the offset relative to the
11608 output toc base plus 0x8000. Making the input elf_gp an
11609 offset allows us to move the toc as a whole without
11610 recalculating input elf_gp. */
11611 off = htab->toc_curr - elf_gp (isec->output_section->owner);
11612 off += TOC_BASE_OFF;
11613
11614 /* Die if someone uses a linker script that doesn't keep input
11615 file .toc and .got together. */
11616 if (new_bfd
11617 && elf_gp (isec->owner) != 0
11618 && elf_gp (isec->owner) != off)
11619 return FALSE;
11620
11621 elf_gp (isec->owner) = off;
11622 return TRUE;
11623 }
11624
11625 /* During the second pass toc_first_sec points to the start of
11626 a toc group, and toc_curr is used to track the old elf_gp.
11627 We use toc_bfd to ensure we only look at each bfd once. */
11628 if (htab->toc_bfd == isec->owner)
11629 return TRUE;
11630 htab->toc_bfd = isec->owner;
11631
11632 if (htab->toc_first_sec == NULL
11633 || htab->toc_curr != elf_gp (isec->owner))
11634 {
11635 htab->toc_curr = elf_gp (isec->owner);
11636 htab->toc_first_sec = isec;
11637 }
11638 addr = (htab->toc_first_sec->output_offset
11639 + htab->toc_first_sec->output_section->vma);
11640 off = addr - elf_gp (isec->output_section->owner) + TOC_BASE_OFF;
11641 elf_gp (isec->owner) = off;
11642
11643 return TRUE;
11644 }
11645
11646 /* Called via elf_link_hash_traverse to merge GOT entries for global
11647 symbol H. */
11648
11649 static bfd_boolean
11650 merge_global_got (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
11651 {
11652 if (h->root.type == bfd_link_hash_indirect)
11653 return TRUE;
11654
11655 merge_got_entries (&h->got.glist);
11656
11657 return TRUE;
11658 }
11659
11660 /* Called via elf_link_hash_traverse to allocate GOT entries for global
11661 symbol H. */
11662
11663 static bfd_boolean
11664 reallocate_got (struct elf_link_hash_entry *h, void *inf)
11665 {
11666 struct got_entry *gent;
11667
11668 if (h->root.type == bfd_link_hash_indirect)
11669 return TRUE;
11670
11671 for (gent = h->got.glist; gent != NULL; gent = gent->next)
11672 if (!gent->is_indirect)
11673 allocate_got (h, (struct bfd_link_info *) inf, gent);
11674 return TRUE;
11675 }
11676
11677 /* Called on the first multitoc pass after the last call to
11678 ppc64_elf_next_toc_section. This function removes duplicate GOT
11679 entries. */
11680
11681 bfd_boolean
11682 ppc64_elf_layout_multitoc (struct bfd_link_info *info)
11683 {
11684 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11685 struct bfd *ibfd, *ibfd2;
11686 bfd_boolean done_something;
11687
11688 htab->multi_toc_needed = htab->toc_curr != elf_gp (info->output_bfd);
11689
11690 if (!htab->do_multi_toc)
11691 return FALSE;
11692
11693 /* Merge global sym got entries within a toc group. */
11694 elf_link_hash_traverse (&htab->elf, merge_global_got, info);
11695
11696 /* And tlsld_got. */
11697 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11698 {
11699 struct got_entry *ent, *ent2;
11700
11701 if (!is_ppc64_elf (ibfd))
11702 continue;
11703
11704 ent = ppc64_tlsld_got (ibfd);
11705 if (!ent->is_indirect
11706 && ent->got.offset != (bfd_vma) -1)
11707 {
11708 for (ibfd2 = ibfd->link.next; ibfd2 != NULL; ibfd2 = ibfd2->link.next)
11709 {
11710 if (!is_ppc64_elf (ibfd2))
11711 continue;
11712
11713 ent2 = ppc64_tlsld_got (ibfd2);
11714 if (!ent2->is_indirect
11715 && ent2->got.offset != (bfd_vma) -1
11716 && elf_gp (ibfd2) == elf_gp (ibfd))
11717 {
11718 ent2->is_indirect = TRUE;
11719 ent2->got.ent = ent;
11720 }
11721 }
11722 }
11723 }
11724
11725 /* Zap sizes of got sections. */
11726 htab->elf.irelplt->rawsize = htab->elf.irelplt->size;
11727 htab->elf.irelplt->size -= htab->got_reli_size;
11728 htab->got_reli_size = 0;
11729
11730 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11731 {
11732 asection *got, *relgot;
11733
11734 if (!is_ppc64_elf (ibfd))
11735 continue;
11736
11737 got = ppc64_elf_tdata (ibfd)->got;
11738 if (got != NULL)
11739 {
11740 got->rawsize = got->size;
11741 got->size = 0;
11742 relgot = ppc64_elf_tdata (ibfd)->relgot;
11743 relgot->rawsize = relgot->size;
11744 relgot->size = 0;
11745 }
11746 }
11747
11748 /* Now reallocate the got, local syms first. We don't need to
11749 allocate section contents again since we never increase size. */
11750 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11751 {
11752 struct got_entry **lgot_ents;
11753 struct got_entry **end_lgot_ents;
11754 struct plt_entry **local_plt;
11755 struct plt_entry **end_local_plt;
11756 unsigned char *lgot_masks;
11757 bfd_size_type locsymcount;
11758 Elf_Internal_Shdr *symtab_hdr;
11759 asection *s;
11760
11761 if (!is_ppc64_elf (ibfd))
11762 continue;
11763
11764 lgot_ents = elf_local_got_ents (ibfd);
11765 if (!lgot_ents)
11766 continue;
11767
11768 symtab_hdr = &elf_symtab_hdr (ibfd);
11769 locsymcount = symtab_hdr->sh_info;
11770 end_lgot_ents = lgot_ents + locsymcount;
11771 local_plt = (struct plt_entry **) end_lgot_ents;
11772 end_local_plt = local_plt + locsymcount;
11773 lgot_masks = (unsigned char *) end_local_plt;
11774 s = ppc64_elf_tdata (ibfd)->got;
11775 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
11776 {
11777 struct got_entry *ent;
11778
11779 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
11780 {
11781 unsigned int ent_size = 8;
11782 unsigned int rel_size = sizeof (Elf64_External_Rela);
11783
11784 ent->got.offset = s->size;
11785 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
11786 {
11787 ent_size *= 2;
11788 rel_size *= 2;
11789 }
11790 s->size += ent_size;
11791 if ((*lgot_masks & PLT_IFUNC) != 0)
11792 {
11793 htab->elf.irelplt->size += rel_size;
11794 htab->got_reli_size += rel_size;
11795 }
11796 else if (bfd_link_pic (info))
11797 {
11798 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
11799 srel->size += rel_size;
11800 }
11801 }
11802 }
11803 }
11804
11805 elf_link_hash_traverse (&htab->elf, reallocate_got, info);
11806
11807 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11808 {
11809 struct got_entry *ent;
11810
11811 if (!is_ppc64_elf (ibfd))
11812 continue;
11813
11814 ent = ppc64_tlsld_got (ibfd);
11815 if (!ent->is_indirect
11816 && ent->got.offset != (bfd_vma) -1)
11817 {
11818 asection *s = ppc64_elf_tdata (ibfd)->got;
11819 ent->got.offset = s->size;
11820 s->size += 16;
11821 if (bfd_link_pic (info))
11822 {
11823 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
11824 srel->size += sizeof (Elf64_External_Rela);
11825 }
11826 }
11827 }
11828
11829 done_something = htab->elf.irelplt->rawsize != htab->elf.irelplt->size;
11830 if (!done_something)
11831 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11832 {
11833 asection *got;
11834
11835 if (!is_ppc64_elf (ibfd))
11836 continue;
11837
11838 got = ppc64_elf_tdata (ibfd)->got;
11839 if (got != NULL)
11840 {
11841 done_something = got->rawsize != got->size;
11842 if (done_something)
11843 break;
11844 }
11845 }
11846
11847 if (done_something)
11848 (*htab->params->layout_sections_again) ();
11849
11850 /* Set up for second pass over toc sections to recalculate elf_gp
11851 on input sections. */
11852 htab->toc_bfd = NULL;
11853 htab->toc_first_sec = NULL;
11854 htab->second_toc_pass = TRUE;
11855 return done_something;
11856 }
11857
11858 /* Called after second pass of multitoc partitioning. */
11859
11860 void
11861 ppc64_elf_finish_multitoc_partition (struct bfd_link_info *info)
11862 {
11863 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11864
11865 /* After the second pass, toc_curr tracks the TOC offset used
11866 for code sections below in ppc64_elf_next_input_section. */
11867 htab->toc_curr = TOC_BASE_OFF;
11868 }
11869
11870 /* No toc references were found in ISEC. If the code in ISEC makes no
11871 calls, then there's no need to use toc adjusting stubs when branching
11872 into ISEC. Actually, indirect calls from ISEC are OK as they will
11873 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
11874 needed, and 2 if a cyclical call-graph was found but no other reason
11875 for a stub was detected. If called from the top level, a return of
11876 2 means the same as a return of 0. */
11877
11878 static int
11879 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
11880 {
11881 int ret;
11882
11883 /* Mark this section as checked. */
11884 isec->call_check_done = 1;
11885
11886 /* We know none of our code bearing sections will need toc stubs. */
11887 if ((isec->flags & SEC_LINKER_CREATED) != 0)
11888 return 0;
11889
11890 if (isec->size == 0)
11891 return 0;
11892
11893 if (isec->output_section == NULL)
11894 return 0;
11895
11896 ret = 0;
11897 if (isec->reloc_count != 0)
11898 {
11899 Elf_Internal_Rela *relstart, *rel;
11900 Elf_Internal_Sym *local_syms;
11901 struct ppc_link_hash_table *htab;
11902
11903 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
11904 info->keep_memory);
11905 if (relstart == NULL)
11906 return -1;
11907
11908 /* Look for branches to outside of this section. */
11909 local_syms = NULL;
11910 htab = ppc_hash_table (info);
11911 if (htab == NULL)
11912 return -1;
11913
11914 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
11915 {
11916 enum elf_ppc64_reloc_type r_type;
11917 unsigned long r_symndx;
11918 struct elf_link_hash_entry *h;
11919 struct ppc_link_hash_entry *eh;
11920 Elf_Internal_Sym *sym;
11921 asection *sym_sec;
11922 struct _opd_sec_data *opd;
11923 bfd_vma sym_value;
11924 bfd_vma dest;
11925
11926 r_type = ELF64_R_TYPE (rel->r_info);
11927 if (r_type != R_PPC64_REL24
11928 && r_type != R_PPC64_REL14
11929 && r_type != R_PPC64_REL14_BRTAKEN
11930 && r_type != R_PPC64_REL14_BRNTAKEN)
11931 continue;
11932
11933 r_symndx = ELF64_R_SYM (rel->r_info);
11934 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
11935 isec->owner))
11936 {
11937 ret = -1;
11938 break;
11939 }
11940
11941 /* Calls to dynamic lib functions go through a plt call stub
11942 that uses r2. */
11943 eh = (struct ppc_link_hash_entry *) h;
11944 if (eh != NULL
11945 && (eh->elf.plt.plist != NULL
11946 || (eh->oh != NULL
11947 && ppc_follow_link (eh->oh)->elf.plt.plist != NULL)))
11948 {
11949 ret = 1;
11950 break;
11951 }
11952
11953 if (sym_sec == NULL)
11954 /* Ignore other undefined symbols. */
11955 continue;
11956
11957 /* Assume branches to other sections not included in the
11958 link need stubs too, to cover -R and absolute syms. */
11959 if (sym_sec->output_section == NULL)
11960 {
11961 ret = 1;
11962 break;
11963 }
11964
11965 if (h == NULL)
11966 sym_value = sym->st_value;
11967 else
11968 {
11969 if (h->root.type != bfd_link_hash_defined
11970 && h->root.type != bfd_link_hash_defweak)
11971 abort ();
11972 sym_value = h->root.u.def.value;
11973 }
11974 sym_value += rel->r_addend;
11975
11976 /* If this branch reloc uses an opd sym, find the code section. */
11977 opd = get_opd_info (sym_sec);
11978 if (opd != NULL)
11979 {
11980 if (h == NULL && opd->adjust != NULL)
11981 {
11982 long adjust;
11983
11984 adjust = opd->adjust[OPD_NDX (sym_value)];
11985 if (adjust == -1)
11986 /* Assume deleted functions won't ever be called. */
11987 continue;
11988 sym_value += adjust;
11989 }
11990
11991 dest = opd_entry_value (sym_sec, sym_value,
11992 &sym_sec, NULL, FALSE);
11993 if (dest == (bfd_vma) -1)
11994 continue;
11995 }
11996 else
11997 dest = (sym_value
11998 + sym_sec->output_offset
11999 + sym_sec->output_section->vma);
12000
12001 /* Ignore branch to self. */
12002 if (sym_sec == isec)
12003 continue;
12004
12005 /* If the called function uses the toc, we need a stub. */
12006 if (sym_sec->has_toc_reloc
12007 || sym_sec->makes_toc_func_call)
12008 {
12009 ret = 1;
12010 break;
12011 }
12012
12013 /* Assume any branch that needs a long branch stub might in fact
12014 need a plt_branch stub. A plt_branch stub uses r2. */
12015 else if (dest - (isec->output_offset
12016 + isec->output_section->vma
12017 + rel->r_offset) + (1 << 25)
12018 >= (2u << 25) - PPC64_LOCAL_ENTRY_OFFSET (h
12019 ? h->other
12020 : sym->st_other))
12021 {
12022 ret = 1;
12023 break;
12024 }
12025
12026 /* If calling back to a section in the process of being
12027 tested, we can't say for sure that no toc adjusting stubs
12028 are needed, so don't return zero. */
12029 else if (sym_sec->call_check_in_progress)
12030 ret = 2;
12031
12032 /* Branches to another section that itself doesn't have any TOC
12033 references are OK. Recursively call ourselves to check. */
12034 else if (!sym_sec->call_check_done)
12035 {
12036 int recur;
12037
12038 /* Mark current section as indeterminate, so that other
12039 sections that call back to current won't be marked as
12040 known. */
12041 isec->call_check_in_progress = 1;
12042 recur = toc_adjusting_stub_needed (info, sym_sec);
12043 isec->call_check_in_progress = 0;
12044
12045 if (recur != 0)
12046 {
12047 ret = recur;
12048 if (recur != 2)
12049 break;
12050 }
12051 }
12052 }
12053
12054 if (local_syms != NULL
12055 && (elf_symtab_hdr (isec->owner).contents
12056 != (unsigned char *) local_syms))
12057 free (local_syms);
12058 if (elf_section_data (isec)->relocs != relstart)
12059 free (relstart);
12060 }
12061
12062 if ((ret & 1) == 0
12063 && isec->map_head.s != NULL
12064 && (strcmp (isec->output_section->name, ".init") == 0
12065 || strcmp (isec->output_section->name, ".fini") == 0))
12066 {
12067 if (isec->map_head.s->has_toc_reloc
12068 || isec->map_head.s->makes_toc_func_call)
12069 ret = 1;
12070 else if (!isec->map_head.s->call_check_done)
12071 {
12072 int recur;
12073 isec->call_check_in_progress = 1;
12074 recur = toc_adjusting_stub_needed (info, isec->map_head.s);
12075 isec->call_check_in_progress = 0;
12076 if (recur != 0)
12077 ret = recur;
12078 }
12079 }
12080
12081 if (ret == 1)
12082 isec->makes_toc_func_call = 1;
12083
12084 return ret;
12085 }
12086
12087 /* The linker repeatedly calls this function for each input section,
12088 in the order that input sections are linked into output sections.
12089 Build lists of input sections to determine groupings between which
12090 we may insert linker stubs. */
12091
12092 bfd_boolean
12093 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
12094 {
12095 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12096
12097 if (htab == NULL)
12098 return FALSE;
12099
12100 if ((isec->output_section->flags & SEC_CODE) != 0
12101 && isec->output_section->id < htab->sec_info_arr_size)
12102 {
12103 /* This happens to make the list in reverse order,
12104 which is what we want. */
12105 htab->sec_info[isec->id].u.list
12106 = htab->sec_info[isec->output_section->id].u.list;
12107 htab->sec_info[isec->output_section->id].u.list = isec;
12108 }
12109
12110 if (htab->multi_toc_needed)
12111 {
12112 /* Analyse sections that aren't already flagged as needing a
12113 valid toc pointer. Exclude .fixup for the linux kernel.
12114 .fixup contains branches, but only back to the function that
12115 hit an exception. */
12116 if (!(isec->has_toc_reloc
12117 || (isec->flags & SEC_CODE) == 0
12118 || strcmp (isec->name, ".fixup") == 0
12119 || isec->call_check_done))
12120 {
12121 if (toc_adjusting_stub_needed (info, isec) < 0)
12122 return FALSE;
12123 }
12124 /* Make all sections use the TOC assigned for this object file.
12125 This will be wrong for pasted sections; We fix that in
12126 check_pasted_section(). */
12127 if (elf_gp (isec->owner) != 0)
12128 htab->toc_curr = elf_gp (isec->owner);
12129 }
12130
12131 htab->sec_info[isec->id].toc_off = htab->toc_curr;
12132 return TRUE;
12133 }
12134
12135 /* Check that all .init and .fini sections use the same toc, if they
12136 have toc relocs. */
12137
12138 static bfd_boolean
12139 check_pasted_section (struct bfd_link_info *info, const char *name)
12140 {
12141 asection *o = bfd_get_section_by_name (info->output_bfd, name);
12142
12143 if (o != NULL)
12144 {
12145 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12146 bfd_vma toc_off = 0;
12147 asection *i;
12148
12149 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
12150 if (i->has_toc_reloc)
12151 {
12152 if (toc_off == 0)
12153 toc_off = htab->sec_info[i->id].toc_off;
12154 else if (toc_off != htab->sec_info[i->id].toc_off)
12155 return FALSE;
12156 }
12157
12158 if (toc_off == 0)
12159 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
12160 if (i->makes_toc_func_call)
12161 {
12162 toc_off = htab->sec_info[i->id].toc_off;
12163 break;
12164 }
12165
12166 /* Make sure the whole pasted function uses the same toc offset. */
12167 if (toc_off != 0)
12168 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
12169 htab->sec_info[i->id].toc_off = toc_off;
12170 }
12171 return TRUE;
12172 }
12173
12174 bfd_boolean
12175 ppc64_elf_check_init_fini (struct bfd_link_info *info)
12176 {
12177 return (check_pasted_section (info, ".init")
12178 & check_pasted_section (info, ".fini"));
12179 }
12180
12181 /* See whether we can group stub sections together. Grouping stub
12182 sections may result in fewer stubs. More importantly, we need to
12183 put all .init* and .fini* stubs at the beginning of the .init or
12184 .fini output sections respectively, because glibc splits the
12185 _init and _fini functions into multiple parts. Putting a stub in
12186 the middle of a function is not a good idea. */
12187
12188 static bfd_boolean
12189 group_sections (struct bfd_link_info *info,
12190 bfd_size_type stub_group_size,
12191 bfd_boolean stubs_always_before_branch)
12192 {
12193 struct ppc_link_hash_table *htab;
12194 asection *osec;
12195 bfd_boolean suppress_size_errors;
12196
12197 htab = ppc_hash_table (info);
12198 if (htab == NULL)
12199 return FALSE;
12200
12201 suppress_size_errors = FALSE;
12202 if (stub_group_size == 1)
12203 {
12204 /* Default values. */
12205 if (stubs_always_before_branch)
12206 stub_group_size = 0x1e00000;
12207 else
12208 stub_group_size = 0x1c00000;
12209 suppress_size_errors = TRUE;
12210 }
12211
12212 for (osec = info->output_bfd->sections; osec != NULL; osec = osec->next)
12213 {
12214 asection *tail;
12215
12216 if (osec->id >= htab->sec_info_arr_size)
12217 continue;
12218
12219 tail = htab->sec_info[osec->id].u.list;
12220 while (tail != NULL)
12221 {
12222 asection *curr;
12223 asection *prev;
12224 bfd_size_type total;
12225 bfd_boolean big_sec;
12226 bfd_vma curr_toc;
12227 struct map_stub *group;
12228 bfd_size_type group_size;
12229
12230 curr = tail;
12231 total = tail->size;
12232 group_size = (ppc64_elf_section_data (tail) != NULL
12233 && ppc64_elf_section_data (tail)->has_14bit_branch
12234 ? stub_group_size >> 10 : stub_group_size);
12235
12236 big_sec = total > group_size;
12237 if (big_sec && !suppress_size_errors)
12238 /* xgettext:c-format */
12239 _bfd_error_handler (_("%B section %A exceeds stub group size"),
12240 tail->owner, tail);
12241 curr_toc = htab->sec_info[tail->id].toc_off;
12242
12243 while ((prev = htab->sec_info[curr->id].u.list) != NULL
12244 && ((total += curr->output_offset - prev->output_offset)
12245 < (ppc64_elf_section_data (prev) != NULL
12246 && ppc64_elf_section_data (prev)->has_14bit_branch
12247 ? (group_size = stub_group_size >> 10) : group_size))
12248 && htab->sec_info[prev->id].toc_off == curr_toc)
12249 curr = prev;
12250
12251 /* OK, the size from the start of CURR to the end is less
12252 than group_size and thus can be handled by one stub
12253 section. (or the tail section is itself larger than
12254 group_size, in which case we may be toast.) We should
12255 really be keeping track of the total size of stubs added
12256 here, as stubs contribute to the final output section
12257 size. That's a little tricky, and this way will only
12258 break if stubs added make the total size more than 2^25,
12259 ie. for the default stub_group_size, if stubs total more
12260 than 2097152 bytes, or nearly 75000 plt call stubs. */
12261 group = bfd_alloc (curr->owner, sizeof (*group));
12262 if (group == NULL)
12263 return FALSE;
12264 group->link_sec = curr;
12265 group->stub_sec = NULL;
12266 group->needs_save_res = 0;
12267 group->tls_get_addr_opt_bctrl = -1u;
12268 group->next = htab->group;
12269 htab->group = group;
12270 do
12271 {
12272 prev = htab->sec_info[tail->id].u.list;
12273 /* Set up this stub group. */
12274 htab->sec_info[tail->id].u.group = group;
12275 }
12276 while (tail != curr && (tail = prev) != NULL);
12277
12278 /* But wait, there's more! Input sections up to group_size
12279 bytes before the stub section can be handled by it too.
12280 Don't do this if we have a really large section after the
12281 stubs, as adding more stubs increases the chance that
12282 branches may not reach into the stub section. */
12283 if (!stubs_always_before_branch && !big_sec)
12284 {
12285 total = 0;
12286 while (prev != NULL
12287 && ((total += tail->output_offset - prev->output_offset)
12288 < (ppc64_elf_section_data (prev) != NULL
12289 && ppc64_elf_section_data (prev)->has_14bit_branch
12290 ? (group_size = stub_group_size >> 10) : group_size))
12291 && htab->sec_info[prev->id].toc_off == curr_toc)
12292 {
12293 tail = prev;
12294 prev = htab->sec_info[tail->id].u.list;
12295 htab->sec_info[tail->id].u.group = group;
12296 }
12297 }
12298 tail = prev;
12299 }
12300 }
12301 return TRUE;
12302 }
12303
12304 static const unsigned char glink_eh_frame_cie[] =
12305 {
12306 0, 0, 0, 16, /* length. */
12307 0, 0, 0, 0, /* id. */
12308 1, /* CIE version. */
12309 'z', 'R', 0, /* Augmentation string. */
12310 4, /* Code alignment. */
12311 0x78, /* Data alignment. */
12312 65, /* RA reg. */
12313 1, /* Augmentation size. */
12314 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
12315 DW_CFA_def_cfa, 1, 0 /* def_cfa: r1 offset 0. */
12316 };
12317
12318 static size_t
12319 stub_eh_frame_size (struct map_stub *group, size_t align)
12320 {
12321 size_t this_size = 17;
12322 if (group->tls_get_addr_opt_bctrl != -1u)
12323 {
12324 unsigned int to_bctrl = group->tls_get_addr_opt_bctrl / 4;
12325 if (to_bctrl < 64)
12326 this_size += 1;
12327 else if (to_bctrl < 256)
12328 this_size += 2;
12329 else if (to_bctrl < 65536)
12330 this_size += 3;
12331 else
12332 this_size += 5;
12333 this_size += 6;
12334 }
12335 this_size = (this_size + align - 1) & -align;
12336 return this_size;
12337 }
12338
12339 /* Stripping output sections is normally done before dynamic section
12340 symbols have been allocated. This function is called later, and
12341 handles cases like htab->brlt which is mapped to its own output
12342 section. */
12343
12344 static void
12345 maybe_strip_output (struct bfd_link_info *info, asection *isec)
12346 {
12347 if (isec->size == 0
12348 && isec->output_section->size == 0
12349 && !(isec->output_section->flags & SEC_KEEP)
12350 && !bfd_section_removed_from_list (info->output_bfd,
12351 isec->output_section)
12352 && elf_section_data (isec->output_section)->dynindx == 0)
12353 {
12354 isec->output_section->flags |= SEC_EXCLUDE;
12355 bfd_section_list_remove (info->output_bfd, isec->output_section);
12356 info->output_bfd->section_count--;
12357 }
12358 }
12359
12360 /* Determine and set the size of the stub section for a final link.
12361
12362 The basic idea here is to examine all the relocations looking for
12363 PC-relative calls to a target that is unreachable with a "bl"
12364 instruction. */
12365
12366 bfd_boolean
12367 ppc64_elf_size_stubs (struct bfd_link_info *info)
12368 {
12369 bfd_size_type stub_group_size;
12370 bfd_boolean stubs_always_before_branch;
12371 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12372
12373 if (htab == NULL)
12374 return FALSE;
12375
12376 if (htab->params->plt_thread_safe == -1 && !bfd_link_executable (info))
12377 htab->params->plt_thread_safe = 1;
12378 if (!htab->opd_abi)
12379 htab->params->plt_thread_safe = 0;
12380 else if (htab->params->plt_thread_safe == -1)
12381 {
12382 static const char *const thread_starter[] =
12383 {
12384 "pthread_create",
12385 /* libstdc++ */
12386 "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE",
12387 /* librt */
12388 "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio",
12389 "mq_notify", "create_timer",
12390 /* libanl */
12391 "getaddrinfo_a",
12392 /* libgomp */
12393 "GOMP_parallel",
12394 "GOMP_parallel_start",
12395 "GOMP_parallel_loop_static",
12396 "GOMP_parallel_loop_static_start",
12397 "GOMP_parallel_loop_dynamic",
12398 "GOMP_parallel_loop_dynamic_start",
12399 "GOMP_parallel_loop_guided",
12400 "GOMP_parallel_loop_guided_start",
12401 "GOMP_parallel_loop_runtime",
12402 "GOMP_parallel_loop_runtime_start",
12403 "GOMP_parallel_sections",
12404 "GOMP_parallel_sections_start",
12405 /* libgo */
12406 "__go_go",
12407 };
12408 unsigned i;
12409
12410 for (i = 0; i < ARRAY_SIZE (thread_starter); i++)
12411 {
12412 struct elf_link_hash_entry *h;
12413 h = elf_link_hash_lookup (&htab->elf, thread_starter[i],
12414 FALSE, FALSE, TRUE);
12415 htab->params->plt_thread_safe = h != NULL && h->ref_regular;
12416 if (htab->params->plt_thread_safe)
12417 break;
12418 }
12419 }
12420 stubs_always_before_branch = htab->params->group_size < 0;
12421 if (htab->params->group_size < 0)
12422 stub_group_size = -htab->params->group_size;
12423 else
12424 stub_group_size = htab->params->group_size;
12425
12426 if (!group_sections (info, stub_group_size, stubs_always_before_branch))
12427 return FALSE;
12428
12429 #define STUB_SHRINK_ITER 20
12430 /* Loop until no stubs added. After iteration 20 of this loop we may
12431 exit on a stub section shrinking. This is to break out of a
12432 pathological case where adding stubs on one iteration decreases
12433 section gaps (perhaps due to alignment), which then requires
12434 fewer or smaller stubs on the next iteration. */
12435
12436 while (1)
12437 {
12438 bfd *input_bfd;
12439 unsigned int bfd_indx;
12440 struct map_stub *group;
12441
12442 htab->stub_iteration += 1;
12443
12444 for (input_bfd = info->input_bfds, bfd_indx = 0;
12445 input_bfd != NULL;
12446 input_bfd = input_bfd->link.next, bfd_indx++)
12447 {
12448 Elf_Internal_Shdr *symtab_hdr;
12449 asection *section;
12450 Elf_Internal_Sym *local_syms = NULL;
12451
12452 if (!is_ppc64_elf (input_bfd))
12453 continue;
12454
12455 /* We'll need the symbol table in a second. */
12456 symtab_hdr = &elf_symtab_hdr (input_bfd);
12457 if (symtab_hdr->sh_info == 0)
12458 continue;
12459
12460 /* Walk over each section attached to the input bfd. */
12461 for (section = input_bfd->sections;
12462 section != NULL;
12463 section = section->next)
12464 {
12465 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
12466
12467 /* If there aren't any relocs, then there's nothing more
12468 to do. */
12469 if ((section->flags & SEC_RELOC) == 0
12470 || (section->flags & SEC_ALLOC) == 0
12471 || (section->flags & SEC_LOAD) == 0
12472 || (section->flags & SEC_CODE) == 0
12473 || section->reloc_count == 0)
12474 continue;
12475
12476 /* If this section is a link-once section that will be
12477 discarded, then don't create any stubs. */
12478 if (section->output_section == NULL
12479 || section->output_section->owner != info->output_bfd)
12480 continue;
12481
12482 /* Get the relocs. */
12483 internal_relocs
12484 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
12485 info->keep_memory);
12486 if (internal_relocs == NULL)
12487 goto error_ret_free_local;
12488
12489 /* Now examine each relocation. */
12490 irela = internal_relocs;
12491 irelaend = irela + section->reloc_count;
12492 for (; irela < irelaend; irela++)
12493 {
12494 enum elf_ppc64_reloc_type r_type;
12495 unsigned int r_indx;
12496 enum ppc_stub_type stub_type;
12497 struct ppc_stub_hash_entry *stub_entry;
12498 asection *sym_sec, *code_sec;
12499 bfd_vma sym_value, code_value;
12500 bfd_vma destination;
12501 unsigned long local_off;
12502 bfd_boolean ok_dest;
12503 struct ppc_link_hash_entry *hash;
12504 struct ppc_link_hash_entry *fdh;
12505 struct elf_link_hash_entry *h;
12506 Elf_Internal_Sym *sym;
12507 char *stub_name;
12508 const asection *id_sec;
12509 struct _opd_sec_data *opd;
12510 struct plt_entry *plt_ent;
12511
12512 r_type = ELF64_R_TYPE (irela->r_info);
12513 r_indx = ELF64_R_SYM (irela->r_info);
12514
12515 if (r_type >= R_PPC64_max)
12516 {
12517 bfd_set_error (bfd_error_bad_value);
12518 goto error_ret_free_internal;
12519 }
12520
12521 /* Only look for stubs on branch instructions. */
12522 if (r_type != R_PPC64_REL24
12523 && r_type != R_PPC64_REL14
12524 && r_type != R_PPC64_REL14_BRTAKEN
12525 && r_type != R_PPC64_REL14_BRNTAKEN)
12526 continue;
12527
12528 /* Now determine the call target, its name, value,
12529 section. */
12530 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
12531 r_indx, input_bfd))
12532 goto error_ret_free_internal;
12533 hash = (struct ppc_link_hash_entry *) h;
12534
12535 ok_dest = FALSE;
12536 fdh = NULL;
12537 sym_value = 0;
12538 if (hash == NULL)
12539 {
12540 sym_value = sym->st_value;
12541 if (sym_sec != NULL
12542 && sym_sec->output_section != NULL)
12543 ok_dest = TRUE;
12544 }
12545 else if (hash->elf.root.type == bfd_link_hash_defined
12546 || hash->elf.root.type == bfd_link_hash_defweak)
12547 {
12548 sym_value = hash->elf.root.u.def.value;
12549 if (sym_sec->output_section != NULL)
12550 ok_dest = TRUE;
12551 }
12552 else if (hash->elf.root.type == bfd_link_hash_undefweak
12553 || hash->elf.root.type == bfd_link_hash_undefined)
12554 {
12555 /* Recognise an old ABI func code entry sym, and
12556 use the func descriptor sym instead if it is
12557 defined. */
12558 if (hash->elf.root.root.string[0] == '.'
12559 && hash->oh != NULL)
12560 {
12561 fdh = ppc_follow_link (hash->oh);
12562 if (fdh->elf.root.type == bfd_link_hash_defined
12563 || fdh->elf.root.type == bfd_link_hash_defweak)
12564 {
12565 sym_sec = fdh->elf.root.u.def.section;
12566 sym_value = fdh->elf.root.u.def.value;
12567 if (sym_sec->output_section != NULL)
12568 ok_dest = TRUE;
12569 }
12570 else
12571 fdh = NULL;
12572 }
12573 }
12574 else
12575 {
12576 bfd_set_error (bfd_error_bad_value);
12577 goto error_ret_free_internal;
12578 }
12579
12580 destination = 0;
12581 local_off = 0;
12582 if (ok_dest)
12583 {
12584 sym_value += irela->r_addend;
12585 destination = (sym_value
12586 + sym_sec->output_offset
12587 + sym_sec->output_section->vma);
12588 local_off = PPC64_LOCAL_ENTRY_OFFSET (hash
12589 ? hash->elf.other
12590 : sym->st_other);
12591 }
12592
12593 code_sec = sym_sec;
12594 code_value = sym_value;
12595 opd = get_opd_info (sym_sec);
12596 if (opd != NULL)
12597 {
12598 bfd_vma dest;
12599
12600 if (hash == NULL && opd->adjust != NULL)
12601 {
12602 long adjust = opd->adjust[OPD_NDX (sym_value)];
12603 if (adjust == -1)
12604 continue;
12605 code_value += adjust;
12606 sym_value += adjust;
12607 }
12608 dest = opd_entry_value (sym_sec, sym_value,
12609 &code_sec, &code_value, FALSE);
12610 if (dest != (bfd_vma) -1)
12611 {
12612 destination = dest;
12613 if (fdh != NULL)
12614 {
12615 /* Fixup old ABI sym to point at code
12616 entry. */
12617 hash->elf.root.type = bfd_link_hash_defweak;
12618 hash->elf.root.u.def.section = code_sec;
12619 hash->elf.root.u.def.value = code_value;
12620 }
12621 }
12622 }
12623
12624 /* Determine what (if any) linker stub is needed. */
12625 plt_ent = NULL;
12626 stub_type = ppc_type_of_stub (section, irela, &hash,
12627 &plt_ent, destination,
12628 local_off);
12629
12630 if (stub_type != ppc_stub_plt_call)
12631 {
12632 /* Check whether we need a TOC adjusting stub.
12633 Since the linker pastes together pieces from
12634 different object files when creating the
12635 _init and _fini functions, it may be that a
12636 call to what looks like a local sym is in
12637 fact a call needing a TOC adjustment. */
12638 if (code_sec != NULL
12639 && code_sec->output_section != NULL
12640 && (htab->sec_info[code_sec->id].toc_off
12641 != htab->sec_info[section->id].toc_off)
12642 && (code_sec->has_toc_reloc
12643 || code_sec->makes_toc_func_call))
12644 stub_type = ppc_stub_long_branch_r2off;
12645 }
12646
12647 if (stub_type == ppc_stub_none)
12648 continue;
12649
12650 /* __tls_get_addr calls might be eliminated. */
12651 if (stub_type != ppc_stub_plt_call
12652 && hash != NULL
12653 && (hash == htab->tls_get_addr
12654 || hash == htab->tls_get_addr_fd)
12655 && section->has_tls_reloc
12656 && irela != internal_relocs)
12657 {
12658 /* Get tls info. */
12659 unsigned char *tls_mask;
12660
12661 if (!get_tls_mask (&tls_mask, NULL, NULL, &local_syms,
12662 irela - 1, input_bfd))
12663 goto error_ret_free_internal;
12664 if (*tls_mask != 0)
12665 continue;
12666 }
12667
12668 if (stub_type == ppc_stub_plt_call)
12669 {
12670 if (!htab->opd_abi
12671 && htab->params->plt_localentry0 != 0
12672 && is_elfv2_localentry0 (&hash->elf))
12673 htab->has_plt_localentry0 = 1;
12674 else if (irela + 1 < irelaend
12675 && irela[1].r_offset == irela->r_offset + 4
12676 && (ELF64_R_TYPE (irela[1].r_info)
12677 == R_PPC64_TOCSAVE))
12678 {
12679 if (!tocsave_find (htab, INSERT,
12680 &local_syms, irela + 1, input_bfd))
12681 goto error_ret_free_internal;
12682 }
12683 else
12684 stub_type = ppc_stub_plt_call_r2save;
12685 }
12686
12687 /* Support for grouping stub sections. */
12688 id_sec = htab->sec_info[section->id].u.group->link_sec;
12689
12690 /* Get the name of this stub. */
12691 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
12692 if (!stub_name)
12693 goto error_ret_free_internal;
12694
12695 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
12696 stub_name, FALSE, FALSE);
12697 if (stub_entry != NULL)
12698 {
12699 /* The proper stub has already been created. */
12700 free (stub_name);
12701 if (stub_type == ppc_stub_plt_call_r2save)
12702 stub_entry->stub_type = stub_type;
12703 continue;
12704 }
12705
12706 stub_entry = ppc_add_stub (stub_name, section, info);
12707 if (stub_entry == NULL)
12708 {
12709 free (stub_name);
12710 error_ret_free_internal:
12711 if (elf_section_data (section)->relocs == NULL)
12712 free (internal_relocs);
12713 error_ret_free_local:
12714 if (local_syms != NULL
12715 && (symtab_hdr->contents
12716 != (unsigned char *) local_syms))
12717 free (local_syms);
12718 return FALSE;
12719 }
12720
12721 stub_entry->stub_type = stub_type;
12722 if (stub_type != ppc_stub_plt_call
12723 && stub_type != ppc_stub_plt_call_r2save)
12724 {
12725 stub_entry->target_value = code_value;
12726 stub_entry->target_section = code_sec;
12727 }
12728 else
12729 {
12730 stub_entry->target_value = sym_value;
12731 stub_entry->target_section = sym_sec;
12732 }
12733 stub_entry->h = hash;
12734 stub_entry->plt_ent = plt_ent;
12735 stub_entry->other = hash ? hash->elf.other : sym->st_other;
12736
12737 if (stub_entry->h != NULL)
12738 htab->stub_globals += 1;
12739 }
12740
12741 /* We're done with the internal relocs, free them. */
12742 if (elf_section_data (section)->relocs != internal_relocs)
12743 free (internal_relocs);
12744 }
12745
12746 if (local_syms != NULL
12747 && symtab_hdr->contents != (unsigned char *) local_syms)
12748 {
12749 if (!info->keep_memory)
12750 free (local_syms);
12751 else
12752 symtab_hdr->contents = (unsigned char *) local_syms;
12753 }
12754 }
12755
12756 /* We may have added some stubs. Find out the new size of the
12757 stub sections. */
12758 for (group = htab->group; group != NULL; group = group->next)
12759 if (group->stub_sec != NULL)
12760 {
12761 asection *stub_sec = group->stub_sec;
12762
12763 if (htab->stub_iteration <= STUB_SHRINK_ITER
12764 || stub_sec->rawsize < stub_sec->size)
12765 /* Past STUB_SHRINK_ITER, rawsize is the max size seen. */
12766 stub_sec->rawsize = stub_sec->size;
12767 stub_sec->size = 0;
12768 stub_sec->reloc_count = 0;
12769 stub_sec->flags &= ~SEC_RELOC;
12770 }
12771
12772 htab->brlt->size = 0;
12773 htab->brlt->reloc_count = 0;
12774 htab->brlt->flags &= ~SEC_RELOC;
12775 if (htab->relbrlt != NULL)
12776 htab->relbrlt->size = 0;
12777
12778 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
12779
12780 for (group = htab->group; group != NULL; group = group->next)
12781 if (group->needs_save_res)
12782 group->stub_sec->size += htab->sfpr->size;
12783
12784 if (info->emitrelocations
12785 && htab->glink != NULL && htab->glink->size != 0)
12786 {
12787 htab->glink->reloc_count = 1;
12788 htab->glink->flags |= SEC_RELOC;
12789 }
12790
12791 if (htab->glink_eh_frame != NULL
12792 && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
12793 && htab->glink_eh_frame->output_section->size != 0)
12794 {
12795 size_t size = 0, align = 4;
12796
12797 for (group = htab->group; group != NULL; group = group->next)
12798 if (group->stub_sec != NULL)
12799 size += stub_eh_frame_size (group, align);
12800 if (htab->glink != NULL && htab->glink->size != 0)
12801 size += (24 + align - 1) & -align;
12802 if (size != 0)
12803 size += (sizeof (glink_eh_frame_cie) + align - 1) & -align;
12804 align = 1ul << htab->glink_eh_frame->output_section->alignment_power;
12805 size = (size + align - 1) & -align;
12806 htab->glink_eh_frame->rawsize = htab->glink_eh_frame->size;
12807 htab->glink_eh_frame->size = size;
12808 }
12809
12810 if (htab->params->plt_stub_align != 0)
12811 for (group = htab->group; group != NULL; group = group->next)
12812 if (group->stub_sec != NULL)
12813 group->stub_sec->size = ((group->stub_sec->size
12814 + (1 << htab->params->plt_stub_align) - 1)
12815 & -(1 << htab->params->plt_stub_align));
12816
12817 for (group = htab->group; group != NULL; group = group->next)
12818 if (group->stub_sec != NULL
12819 && group->stub_sec->rawsize != group->stub_sec->size
12820 && (htab->stub_iteration <= STUB_SHRINK_ITER
12821 || group->stub_sec->rawsize < group->stub_sec->size))
12822 break;
12823
12824 if (group == NULL
12825 && (htab->glink_eh_frame == NULL
12826 || htab->glink_eh_frame->rawsize == htab->glink_eh_frame->size))
12827 break;
12828
12829 /* Ask the linker to do its stuff. */
12830 (*htab->params->layout_sections_again) ();
12831 }
12832
12833 if (htab->glink_eh_frame != NULL
12834 && htab->glink_eh_frame->size != 0)
12835 {
12836 bfd_vma val;
12837 bfd_byte *p, *last_fde;
12838 size_t last_fde_len, size, align, pad;
12839 struct map_stub *group;
12840
12841 p = bfd_zalloc (htab->glink_eh_frame->owner, htab->glink_eh_frame->size);
12842 if (p == NULL)
12843 return FALSE;
12844 htab->glink_eh_frame->contents = p;
12845 last_fde = p;
12846 align = 4;
12847
12848 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
12849 /* CIE length (rewrite in case little-endian). */
12850 last_fde_len = ((sizeof (glink_eh_frame_cie) + align - 1) & -align) - 4;
12851 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
12852 p += last_fde_len + 4;
12853
12854 for (group = htab->group; group != NULL; group = group->next)
12855 if (group->stub_sec != NULL)
12856 {
12857 last_fde = p;
12858 last_fde_len = stub_eh_frame_size (group, align) - 4;
12859 /* FDE length. */
12860 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
12861 p += 4;
12862 /* CIE pointer. */
12863 val = p - htab->glink_eh_frame->contents;
12864 bfd_put_32 (htab->elf.dynobj, val, p);
12865 p += 4;
12866 /* Offset to stub section, written later. */
12867 p += 4;
12868 /* stub section size. */
12869 bfd_put_32 (htab->elf.dynobj, group->stub_sec->size, p);
12870 p += 4;
12871 /* Augmentation. */
12872 p += 1;
12873 if (group->tls_get_addr_opt_bctrl != -1u)
12874 {
12875 unsigned int to_bctrl = group->tls_get_addr_opt_bctrl / 4;
12876
12877 /* This FDE needs more than just the default.
12878 Describe __tls_get_addr_opt stub LR. */
12879 if (to_bctrl < 64)
12880 *p++ = DW_CFA_advance_loc + to_bctrl;
12881 else if (to_bctrl < 256)
12882 {
12883 *p++ = DW_CFA_advance_loc1;
12884 *p++ = to_bctrl;
12885 }
12886 else if (to_bctrl < 65536)
12887 {
12888 *p++ = DW_CFA_advance_loc2;
12889 bfd_put_16 (htab->elf.dynobj, to_bctrl, p);
12890 p += 2;
12891 }
12892 else
12893 {
12894 *p++ = DW_CFA_advance_loc4;
12895 bfd_put_32 (htab->elf.dynobj, to_bctrl, p);
12896 p += 4;
12897 }
12898 *p++ = DW_CFA_offset_extended_sf;
12899 *p++ = 65;
12900 *p++ = -(STK_LINKER (htab) / 8) & 0x7f;
12901 *p++ = DW_CFA_advance_loc + 4;
12902 *p++ = DW_CFA_restore_extended;
12903 *p++ = 65;
12904 }
12905 /* Pad. */
12906 p = last_fde + last_fde_len + 4;
12907 }
12908 if (htab->glink != NULL && htab->glink->size != 0)
12909 {
12910 last_fde = p;
12911 last_fde_len = ((24 + align - 1) & -align) - 4;
12912 /* FDE length. */
12913 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
12914 p += 4;
12915 /* CIE pointer. */
12916 val = p - htab->glink_eh_frame->contents;
12917 bfd_put_32 (htab->elf.dynobj, val, p);
12918 p += 4;
12919 /* Offset to .glink, written later. */
12920 p += 4;
12921 /* .glink size. */
12922 bfd_put_32 (htab->elf.dynobj, htab->glink->size - 8, p);
12923 p += 4;
12924 /* Augmentation. */
12925 p += 1;
12926
12927 *p++ = DW_CFA_advance_loc + 1;
12928 *p++ = DW_CFA_register;
12929 *p++ = 65;
12930 *p++ = htab->opd_abi ? 12 : 0;
12931 *p++ = DW_CFA_advance_loc + (htab->opd_abi ? 5 : 7);
12932 *p++ = DW_CFA_restore_extended;
12933 *p++ = 65;
12934 p += ((24 + align - 1) & -align) - 24;
12935 }
12936 /* Subsume any padding into the last FDE if user .eh_frame
12937 sections are aligned more than glink_eh_frame. Otherwise any
12938 zero padding will be seen as a terminator. */
12939 align = 1ul << htab->glink_eh_frame->output_section->alignment_power;
12940 size = p - htab->glink_eh_frame->contents;
12941 pad = ((size + align - 1) & -align) - size;
12942 htab->glink_eh_frame->size = size + pad;
12943 bfd_put_32 (htab->elf.dynobj, last_fde_len + pad, last_fde);
12944 }
12945
12946 maybe_strip_output (info, htab->brlt);
12947 if (htab->glink_eh_frame != NULL)
12948 maybe_strip_output (info, htab->glink_eh_frame);
12949
12950 return TRUE;
12951 }
12952
12953 /* Called after we have determined section placement. If sections
12954 move, we'll be called again. Provide a value for TOCstart. */
12955
12956 bfd_vma
12957 ppc64_elf_set_toc (struct bfd_link_info *info, bfd *obfd)
12958 {
12959 asection *s;
12960 bfd_vma TOCstart, adjust;
12961
12962 if (info != NULL)
12963 {
12964 struct elf_link_hash_entry *h;
12965 struct elf_link_hash_table *htab = elf_hash_table (info);
12966
12967 if (is_elf_hash_table (htab)
12968 && htab->hgot != NULL)
12969 h = htab->hgot;
12970 else
12971 {
12972 h = elf_link_hash_lookup (htab, ".TOC.", FALSE, FALSE, TRUE);
12973 if (is_elf_hash_table (htab))
12974 htab->hgot = h;
12975 }
12976 if (h != NULL
12977 && h->root.type == bfd_link_hash_defined
12978 && !h->root.linker_def
12979 && (!is_elf_hash_table (htab)
12980 || h->def_regular))
12981 {
12982 TOCstart = (h->root.u.def.value - TOC_BASE_OFF
12983 + h->root.u.def.section->output_offset
12984 + h->root.u.def.section->output_section->vma);
12985 _bfd_set_gp_value (obfd, TOCstart);
12986 return TOCstart;
12987 }
12988 }
12989
12990 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
12991 order. The TOC starts where the first of these sections starts. */
12992 s = bfd_get_section_by_name (obfd, ".got");
12993 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12994 s = bfd_get_section_by_name (obfd, ".toc");
12995 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12996 s = bfd_get_section_by_name (obfd, ".tocbss");
12997 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12998 s = bfd_get_section_by_name (obfd, ".plt");
12999 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
13000 {
13001 /* This may happen for
13002 o references to TOC base (SYM@toc / TOC[tc0]) without a
13003 .toc directive
13004 o bad linker script
13005 o --gc-sections and empty TOC sections
13006
13007 FIXME: Warn user? */
13008
13009 /* Look for a likely section. We probably won't even be
13010 using TOCstart. */
13011 for (s = obfd->sections; s != NULL; s = s->next)
13012 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY
13013 | SEC_EXCLUDE))
13014 == (SEC_ALLOC | SEC_SMALL_DATA))
13015 break;
13016 if (s == NULL)
13017 for (s = obfd->sections; s != NULL; s = s->next)
13018 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_EXCLUDE))
13019 == (SEC_ALLOC | SEC_SMALL_DATA))
13020 break;
13021 if (s == NULL)
13022 for (s = obfd->sections; s != NULL; s = s->next)
13023 if ((s->flags & (SEC_ALLOC | SEC_READONLY | SEC_EXCLUDE))
13024 == SEC_ALLOC)
13025 break;
13026 if (s == NULL)
13027 for (s = obfd->sections; s != NULL; s = s->next)
13028 if ((s->flags & (SEC_ALLOC | SEC_EXCLUDE)) == SEC_ALLOC)
13029 break;
13030 }
13031
13032 TOCstart = 0;
13033 if (s != NULL)
13034 TOCstart = s->output_section->vma + s->output_offset;
13035
13036 /* Force alignment. */
13037 adjust = TOCstart & (TOC_BASE_ALIGN - 1);
13038 TOCstart -= adjust;
13039 _bfd_set_gp_value (obfd, TOCstart);
13040
13041 if (info != NULL && s != NULL)
13042 {
13043 struct ppc_link_hash_table *htab = ppc_hash_table (info);
13044
13045 if (htab != NULL)
13046 {
13047 if (htab->elf.hgot != NULL)
13048 {
13049 htab->elf.hgot->root.u.def.value = TOC_BASE_OFF - adjust;
13050 htab->elf.hgot->root.u.def.section = s;
13051 }
13052 }
13053 else
13054 {
13055 struct bfd_link_hash_entry *bh = NULL;
13056 _bfd_generic_link_add_one_symbol (info, obfd, ".TOC.", BSF_GLOBAL,
13057 s, TOC_BASE_OFF - adjust,
13058 NULL, FALSE, FALSE, &bh);
13059 }
13060 }
13061 return TOCstart;
13062 }
13063
13064 /* Called via elf_link_hash_traverse from ppc64_elf_build_stubs to
13065 write out any global entry stubs. */
13066
13067 static bfd_boolean
13068 build_global_entry_stubs (struct elf_link_hash_entry *h, void *inf)
13069 {
13070 struct bfd_link_info *info;
13071 struct ppc_link_hash_table *htab;
13072 struct plt_entry *pent;
13073 asection *s;
13074
13075 if (h->root.type == bfd_link_hash_indirect)
13076 return TRUE;
13077
13078 if (!h->pointer_equality_needed)
13079 return TRUE;
13080
13081 if (h->def_regular)
13082 return TRUE;
13083
13084 info = inf;
13085 htab = ppc_hash_table (info);
13086 if (htab == NULL)
13087 return FALSE;
13088
13089 s = htab->glink;
13090 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
13091 if (pent->plt.offset != (bfd_vma) -1
13092 && pent->addend == 0)
13093 {
13094 bfd_byte *p;
13095 asection *plt;
13096 bfd_vma off;
13097
13098 p = s->contents + h->root.u.def.value;
13099 plt = htab->elf.splt;
13100 if (!htab->elf.dynamic_sections_created
13101 || h->dynindx == -1)
13102 plt = htab->elf.iplt;
13103 off = pent->plt.offset + plt->output_offset + plt->output_section->vma;
13104 off -= h->root.u.def.value + s->output_offset + s->output_section->vma;
13105
13106 if (off + 0x80008000 > 0xffffffff || (off & 3) != 0)
13107 {
13108 info->callbacks->einfo
13109 (_("%P: linkage table error against `%T'\n"),
13110 h->root.root.string);
13111 bfd_set_error (bfd_error_bad_value);
13112 htab->stub_error = TRUE;
13113 }
13114
13115 htab->stub_count[ppc_stub_global_entry - 1] += 1;
13116 if (htab->params->emit_stub_syms)
13117 {
13118 size_t len = strlen (h->root.root.string);
13119 char *name = bfd_malloc (sizeof "12345678.global_entry." + len);
13120
13121 if (name == NULL)
13122 return FALSE;
13123
13124 sprintf (name, "%08x.global_entry.%s", s->id, h->root.root.string);
13125 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
13126 if (h == NULL)
13127 return FALSE;
13128 if (h->root.type == bfd_link_hash_new)
13129 {
13130 h->root.type = bfd_link_hash_defined;
13131 h->root.u.def.section = s;
13132 h->root.u.def.value = p - s->contents;
13133 h->ref_regular = 1;
13134 h->def_regular = 1;
13135 h->ref_regular_nonweak = 1;
13136 h->forced_local = 1;
13137 h->non_elf = 0;
13138 h->root.linker_def = 1;
13139 }
13140 }
13141
13142 if (PPC_HA (off) != 0)
13143 {
13144 bfd_put_32 (s->owner, ADDIS_R12_R12 | PPC_HA (off), p);
13145 p += 4;
13146 }
13147 bfd_put_32 (s->owner, LD_R12_0R12 | PPC_LO (off), p);
13148 p += 4;
13149 bfd_put_32 (s->owner, MTCTR_R12, p);
13150 p += 4;
13151 bfd_put_32 (s->owner, BCTR, p);
13152 break;
13153 }
13154 return TRUE;
13155 }
13156
13157 /* Build all the stubs associated with the current output file.
13158 The stubs are kept in a hash table attached to the main linker
13159 hash table. This function is called via gldelf64ppc_finish. */
13160
13161 bfd_boolean
13162 ppc64_elf_build_stubs (struct bfd_link_info *info,
13163 char **stats)
13164 {
13165 struct ppc_link_hash_table *htab = ppc_hash_table (info);
13166 struct map_stub *group;
13167 asection *stub_sec;
13168 bfd_byte *p;
13169 int stub_sec_count = 0;
13170
13171 if (htab == NULL)
13172 return FALSE;
13173
13174 /* Allocate memory to hold the linker stubs. */
13175 for (group = htab->group; group != NULL; group = group->next)
13176 if ((stub_sec = group->stub_sec) != NULL
13177 && stub_sec->size != 0)
13178 {
13179 stub_sec->contents = bfd_zalloc (htab->params->stub_bfd, stub_sec->size);
13180 if (stub_sec->contents == NULL)
13181 return FALSE;
13182 stub_sec->size = 0;
13183 }
13184
13185 if (htab->glink != NULL && htab->glink->size != 0)
13186 {
13187 unsigned int indx;
13188 bfd_vma plt0;
13189
13190 /* Build the .glink plt call stub. */
13191 if (htab->params->emit_stub_syms)
13192 {
13193 struct elf_link_hash_entry *h;
13194 h = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
13195 TRUE, FALSE, FALSE);
13196 if (h == NULL)
13197 return FALSE;
13198 if (h->root.type == bfd_link_hash_new)
13199 {
13200 h->root.type = bfd_link_hash_defined;
13201 h->root.u.def.section = htab->glink;
13202 h->root.u.def.value = 8;
13203 h->ref_regular = 1;
13204 h->def_regular = 1;
13205 h->ref_regular_nonweak = 1;
13206 h->forced_local = 1;
13207 h->non_elf = 0;
13208 h->root.linker_def = 1;
13209 }
13210 }
13211 plt0 = (htab->elf.splt->output_section->vma
13212 + htab->elf.splt->output_offset
13213 - 16);
13214 if (info->emitrelocations)
13215 {
13216 Elf_Internal_Rela *r = get_relocs (htab->glink, 1);
13217 if (r == NULL)
13218 return FALSE;
13219 r->r_offset = (htab->glink->output_offset
13220 + htab->glink->output_section->vma);
13221 r->r_info = ELF64_R_INFO (0, R_PPC64_REL64);
13222 r->r_addend = plt0;
13223 }
13224 p = htab->glink->contents;
13225 plt0 -= htab->glink->output_section->vma + htab->glink->output_offset;
13226 bfd_put_64 (htab->glink->owner, plt0, p);
13227 p += 8;
13228 if (htab->opd_abi)
13229 {
13230 bfd_put_32 (htab->glink->owner, MFLR_R12, p);
13231 p += 4;
13232 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
13233 p += 4;
13234 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
13235 p += 4;
13236 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | (-16 & 0xfffc), p);
13237 p += 4;
13238 bfd_put_32 (htab->glink->owner, MTLR_R12, p);
13239 p += 4;
13240 bfd_put_32 (htab->glink->owner, ADD_R11_R2_R11, p);
13241 p += 4;
13242 bfd_put_32 (htab->glink->owner, LD_R12_0R11, p);
13243 p += 4;
13244 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | 8, p);
13245 p += 4;
13246 bfd_put_32 (htab->glink->owner, MTCTR_R12, p);
13247 p += 4;
13248 bfd_put_32 (htab->glink->owner, LD_R11_0R11 | 16, p);
13249 p += 4;
13250 }
13251 else
13252 {
13253 bfd_put_32 (htab->glink->owner, MFLR_R0, p);
13254 p += 4;
13255 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
13256 p += 4;
13257 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
13258 p += 4;
13259 bfd_put_32 (htab->glink->owner, STD_R2_0R1 + 24, p);
13260 p += 4;
13261 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | (-16 & 0xfffc), p);
13262 p += 4;
13263 bfd_put_32 (htab->glink->owner, MTLR_R0, p);
13264 p += 4;
13265 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
13266 p += 4;
13267 bfd_put_32 (htab->glink->owner, ADD_R11_R2_R11, p);
13268 p += 4;
13269 bfd_put_32 (htab->glink->owner, ADDI_R0_R12 | (-48 & 0xffff), p);
13270 p += 4;
13271 bfd_put_32 (htab->glink->owner, LD_R12_0R11, p);
13272 p += 4;
13273 bfd_put_32 (htab->glink->owner, SRDI_R0_R0_2, p);
13274 p += 4;
13275 bfd_put_32 (htab->glink->owner, MTCTR_R12, p);
13276 p += 4;
13277 bfd_put_32 (htab->glink->owner, LD_R11_0R11 | 8, p);
13278 p += 4;
13279 }
13280 bfd_put_32 (htab->glink->owner, BCTR, p);
13281 p += 4;
13282 while (p - htab->glink->contents < GLINK_CALL_STUB_SIZE)
13283 {
13284 bfd_put_32 (htab->glink->owner, NOP, p);
13285 p += 4;
13286 }
13287
13288 /* Build the .glink lazy link call stubs. */
13289 indx = 0;
13290 while (p < htab->glink->contents + htab->glink->rawsize)
13291 {
13292 if (htab->opd_abi)
13293 {
13294 if (indx < 0x8000)
13295 {
13296 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
13297 p += 4;
13298 }
13299 else
13300 {
13301 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
13302 p += 4;
13303 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx),
13304 p);
13305 p += 4;
13306 }
13307 }
13308 bfd_put_32 (htab->glink->owner,
13309 B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p);
13310 indx++;
13311 p += 4;
13312 }
13313
13314 /* Build .glink global entry stubs. */
13315 if (htab->glink->size > htab->glink->rawsize)
13316 elf_link_hash_traverse (&htab->elf, build_global_entry_stubs, info);
13317 }
13318
13319 if (htab->brlt != NULL && htab->brlt->size != 0)
13320 {
13321 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
13322 htab->brlt->size);
13323 if (htab->brlt->contents == NULL)
13324 return FALSE;
13325 }
13326 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
13327 {
13328 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
13329 htab->relbrlt->size);
13330 if (htab->relbrlt->contents == NULL)
13331 return FALSE;
13332 }
13333
13334 /* Build the stubs as directed by the stub hash table. */
13335 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
13336
13337 for (group = htab->group; group != NULL; group = group->next)
13338 if (group->needs_save_res)
13339 {
13340 stub_sec = group->stub_sec;
13341 memcpy (stub_sec->contents + stub_sec->size, htab->sfpr->contents,
13342 htab->sfpr->size);
13343 if (htab->params->emit_stub_syms)
13344 {
13345 unsigned int i;
13346
13347 for (i = 0; i < ARRAY_SIZE (save_res_funcs); i++)
13348 if (!sfpr_define (info, &save_res_funcs[i], stub_sec))
13349 return FALSE;
13350 }
13351 stub_sec->size += htab->sfpr->size;
13352 }
13353
13354 if (htab->relbrlt != NULL)
13355 htab->relbrlt->reloc_count = 0;
13356
13357 if (htab->params->plt_stub_align != 0)
13358 for (group = htab->group; group != NULL; group = group->next)
13359 if ((stub_sec = group->stub_sec) != NULL)
13360 stub_sec->size = ((stub_sec->size
13361 + (1 << htab->params->plt_stub_align) - 1)
13362 & -(1 << htab->params->plt_stub_align));
13363
13364 for (group = htab->group; group != NULL; group = group->next)
13365 if ((stub_sec = group->stub_sec) != NULL)
13366 {
13367 stub_sec_count += 1;
13368 if (stub_sec->rawsize != stub_sec->size
13369 && (htab->stub_iteration <= STUB_SHRINK_ITER
13370 || stub_sec->rawsize < stub_sec->size))
13371 break;
13372 }
13373
13374 /* Note that the glink_eh_frame check here is not only testing that
13375 the generated size matched the calculated size but also that
13376 bfd_elf_discard_info didn't make any changes to the section. */
13377 if (group != NULL
13378 || (htab->glink_eh_frame != NULL
13379 && htab->glink_eh_frame->rawsize != htab->glink_eh_frame->size))
13380 {
13381 htab->stub_error = TRUE;
13382 info->callbacks->einfo (_("%P: stubs don't match calculated size\n"));
13383 }
13384
13385 if (htab->stub_error)
13386 return FALSE;
13387
13388 if (stats != NULL)
13389 {
13390 *stats = bfd_malloc (500);
13391 if (*stats == NULL)
13392 return FALSE;
13393
13394 sprintf (*stats, _("linker stubs in %u group%s\n"
13395 " branch %lu\n"
13396 " toc adjust %lu\n"
13397 " long branch %lu\n"
13398 " long toc adj %lu\n"
13399 " plt call %lu\n"
13400 " plt call toc %lu\n"
13401 " global entry %lu"),
13402 stub_sec_count,
13403 stub_sec_count == 1 ? "" : "s",
13404 htab->stub_count[ppc_stub_long_branch - 1],
13405 htab->stub_count[ppc_stub_long_branch_r2off - 1],
13406 htab->stub_count[ppc_stub_plt_branch - 1],
13407 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
13408 htab->stub_count[ppc_stub_plt_call - 1],
13409 htab->stub_count[ppc_stub_plt_call_r2save - 1],
13410 htab->stub_count[ppc_stub_global_entry - 1]);
13411 }
13412 return TRUE;
13413 }
13414
13415 /* What to do when ld finds relocations against symbols defined in
13416 discarded sections. */
13417
13418 static unsigned int
13419 ppc64_elf_action_discarded (asection *sec)
13420 {
13421 if (strcmp (".opd", sec->name) == 0)
13422 return 0;
13423
13424 if (strcmp (".toc", sec->name) == 0)
13425 return 0;
13426
13427 if (strcmp (".toc1", sec->name) == 0)
13428 return 0;
13429
13430 return _bfd_elf_default_action_discarded (sec);
13431 }
13432
13433 /* The RELOCATE_SECTION function is called by the ELF backend linker
13434 to handle the relocations for a section.
13435
13436 The relocs are always passed as Rela structures; if the section
13437 actually uses Rel structures, the r_addend field will always be
13438 zero.
13439
13440 This function is responsible for adjust the section contents as
13441 necessary, and (if using Rela relocs and generating a
13442 relocatable output file) adjusting the reloc addend as
13443 necessary.
13444
13445 This function does not have to worry about setting the reloc
13446 address or the reloc symbol index.
13447
13448 LOCAL_SYMS is a pointer to the swapped in local symbols.
13449
13450 LOCAL_SECTIONS is an array giving the section in the input file
13451 corresponding to the st_shndx field of each local symbol.
13452
13453 The global hash table entry for the global symbols can be found
13454 via elf_sym_hashes (input_bfd).
13455
13456 When generating relocatable output, this function must handle
13457 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
13458 going to be the section symbol corresponding to the output
13459 section, which means that the addend must be adjusted
13460 accordingly. */
13461
13462 static bfd_boolean
13463 ppc64_elf_relocate_section (bfd *output_bfd,
13464 struct bfd_link_info *info,
13465 bfd *input_bfd,
13466 asection *input_section,
13467 bfd_byte *contents,
13468 Elf_Internal_Rela *relocs,
13469 Elf_Internal_Sym *local_syms,
13470 asection **local_sections)
13471 {
13472 struct ppc_link_hash_table *htab;
13473 Elf_Internal_Shdr *symtab_hdr;
13474 struct elf_link_hash_entry **sym_hashes;
13475 Elf_Internal_Rela *rel;
13476 Elf_Internal_Rela *wrel;
13477 Elf_Internal_Rela *relend;
13478 Elf_Internal_Rela outrel;
13479 bfd_byte *loc;
13480 struct got_entry **local_got_ents;
13481 bfd_vma TOCstart;
13482 bfd_boolean ret = TRUE;
13483 bfd_boolean is_opd;
13484 /* Assume 'at' branch hints. */
13485 bfd_boolean is_isa_v2 = TRUE;
13486 bfd_vma d_offset = (bfd_big_endian (input_bfd) ? 2 : 0);
13487
13488 /* Initialize howto table if needed. */
13489 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
13490 ppc_howto_init ();
13491
13492 htab = ppc_hash_table (info);
13493 if (htab == NULL)
13494 return FALSE;
13495
13496 /* Don't relocate stub sections. */
13497 if (input_section->owner == htab->params->stub_bfd)
13498 return TRUE;
13499
13500 BFD_ASSERT (is_ppc64_elf (input_bfd));
13501
13502 local_got_ents = elf_local_got_ents (input_bfd);
13503 TOCstart = elf_gp (output_bfd);
13504 symtab_hdr = &elf_symtab_hdr (input_bfd);
13505 sym_hashes = elf_sym_hashes (input_bfd);
13506 is_opd = ppc64_elf_section_data (input_section)->sec_type == sec_opd;
13507
13508 rel = wrel = relocs;
13509 relend = relocs + input_section->reloc_count;
13510 for (; rel < relend; wrel++, rel++)
13511 {
13512 enum elf_ppc64_reloc_type r_type;
13513 bfd_vma addend;
13514 bfd_reloc_status_type r;
13515 Elf_Internal_Sym *sym;
13516 asection *sec;
13517 struct elf_link_hash_entry *h_elf;
13518 struct ppc_link_hash_entry *h;
13519 struct ppc_link_hash_entry *fdh;
13520 const char *sym_name;
13521 unsigned long r_symndx, toc_symndx;
13522 bfd_vma toc_addend;
13523 unsigned char tls_mask, tls_gd, tls_type;
13524 unsigned char sym_type;
13525 bfd_vma relocation;
13526 bfd_boolean unresolved_reloc;
13527 bfd_boolean warned;
13528 enum { DEST_NORMAL, DEST_OPD, DEST_STUB } reloc_dest;
13529 unsigned int insn;
13530 unsigned int mask;
13531 struct ppc_stub_hash_entry *stub_entry;
13532 bfd_vma max_br_offset;
13533 bfd_vma from;
13534 Elf_Internal_Rela orig_rel;
13535 reloc_howto_type *howto;
13536 struct reloc_howto_struct alt_howto;
13537
13538 again:
13539 orig_rel = *rel;
13540
13541 r_type = ELF64_R_TYPE (rel->r_info);
13542 r_symndx = ELF64_R_SYM (rel->r_info);
13543
13544 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
13545 symbol of the previous ADDR64 reloc. The symbol gives us the
13546 proper TOC base to use. */
13547 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
13548 && wrel != relocs
13549 && ELF64_R_TYPE (wrel[-1].r_info) == R_PPC64_ADDR64
13550 && is_opd)
13551 r_symndx = ELF64_R_SYM (wrel[-1].r_info);
13552
13553 sym = NULL;
13554 sec = NULL;
13555 h_elf = NULL;
13556 sym_name = NULL;
13557 unresolved_reloc = FALSE;
13558 warned = FALSE;
13559
13560 if (r_symndx < symtab_hdr->sh_info)
13561 {
13562 /* It's a local symbol. */
13563 struct _opd_sec_data *opd;
13564
13565 sym = local_syms + r_symndx;
13566 sec = local_sections[r_symndx];
13567 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
13568 sym_type = ELF64_ST_TYPE (sym->st_info);
13569 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
13570 opd = get_opd_info (sec);
13571 if (opd != NULL && opd->adjust != NULL)
13572 {
13573 long adjust = opd->adjust[OPD_NDX (sym->st_value
13574 + rel->r_addend)];
13575 if (adjust == -1)
13576 relocation = 0;
13577 else
13578 {
13579 /* If this is a relocation against the opd section sym
13580 and we have edited .opd, adjust the reloc addend so
13581 that ld -r and ld --emit-relocs output is correct.
13582 If it is a reloc against some other .opd symbol,
13583 then the symbol value will be adjusted later. */
13584 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
13585 rel->r_addend += adjust;
13586 else
13587 relocation += adjust;
13588 }
13589 }
13590 }
13591 else
13592 {
13593 bfd_boolean ignored;
13594
13595 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
13596 r_symndx, symtab_hdr, sym_hashes,
13597 h_elf, sec, relocation,
13598 unresolved_reloc, warned, ignored);
13599 sym_name = h_elf->root.root.string;
13600 sym_type = h_elf->type;
13601 if (sec != NULL
13602 && sec->owner == output_bfd
13603 && strcmp (sec->name, ".opd") == 0)
13604 {
13605 /* This is a symbol defined in a linker script. All
13606 such are defined in output sections, even those
13607 defined by simple assignment from a symbol defined in
13608 an input section. Transfer the symbol to an
13609 appropriate input .opd section, so that a branch to
13610 this symbol will be mapped to the location specified
13611 by the opd entry. */
13612 struct bfd_link_order *lo;
13613 for (lo = sec->map_head.link_order; lo != NULL; lo = lo->next)
13614 if (lo->type == bfd_indirect_link_order)
13615 {
13616 asection *isec = lo->u.indirect.section;
13617 if (h_elf->root.u.def.value >= isec->output_offset
13618 && h_elf->root.u.def.value < (isec->output_offset
13619 + isec->size))
13620 {
13621 h_elf->root.u.def.value -= isec->output_offset;
13622 h_elf->root.u.def.section = isec;
13623 sec = isec;
13624 break;
13625 }
13626 }
13627 }
13628 }
13629 h = (struct ppc_link_hash_entry *) h_elf;
13630
13631 if (sec != NULL && discarded_section (sec))
13632 {
13633 _bfd_clear_contents (ppc64_elf_howto_table[r_type],
13634 input_bfd, input_section,
13635 contents + rel->r_offset);
13636 wrel->r_offset = rel->r_offset;
13637 wrel->r_info = 0;
13638 wrel->r_addend = 0;
13639
13640 /* For ld -r, remove relocations in debug sections against
13641 sections defined in discarded sections. Not done for
13642 non-debug to preserve relocs in .eh_frame which the
13643 eh_frame editing code expects to be present. */
13644 if (bfd_link_relocatable (info)
13645 && (input_section->flags & SEC_DEBUGGING))
13646 wrel--;
13647
13648 continue;
13649 }
13650
13651 if (bfd_link_relocatable (info))
13652 goto copy_reloc;
13653
13654 if (h != NULL && &h->elf == htab->elf.hgot)
13655 {
13656 relocation = TOCstart + htab->sec_info[input_section->id].toc_off;
13657 sec = bfd_abs_section_ptr;
13658 unresolved_reloc = FALSE;
13659 }
13660
13661 /* TLS optimizations. Replace instruction sequences and relocs
13662 based on information we collected in tls_optimize. We edit
13663 RELOCS so that --emit-relocs will output something sensible
13664 for the final instruction stream. */
13665 tls_mask = 0;
13666 tls_gd = 0;
13667 toc_symndx = 0;
13668 if (h != NULL)
13669 tls_mask = h->tls_mask;
13670 else if (local_got_ents != NULL)
13671 {
13672 struct plt_entry **local_plt = (struct plt_entry **)
13673 (local_got_ents + symtab_hdr->sh_info);
13674 unsigned char *lgot_masks = (unsigned char *)
13675 (local_plt + symtab_hdr->sh_info);
13676 tls_mask = lgot_masks[r_symndx];
13677 }
13678 if (tls_mask == 0
13679 && (r_type == R_PPC64_TLS
13680 || r_type == R_PPC64_TLSGD
13681 || r_type == R_PPC64_TLSLD))
13682 {
13683 /* Check for toc tls entries. */
13684 unsigned char *toc_tls;
13685
13686 if (!get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
13687 &local_syms, rel, input_bfd))
13688 return FALSE;
13689
13690 if (toc_tls)
13691 tls_mask = *toc_tls;
13692 }
13693
13694 /* Check that tls relocs are used with tls syms, and non-tls
13695 relocs are used with non-tls syms. */
13696 if (r_symndx != STN_UNDEF
13697 && r_type != R_PPC64_NONE
13698 && (h == NULL
13699 || h->elf.root.type == bfd_link_hash_defined
13700 || h->elf.root.type == bfd_link_hash_defweak)
13701 && (IS_PPC64_TLS_RELOC (r_type)
13702 != (sym_type == STT_TLS
13703 || (sym_type == STT_SECTION
13704 && (sec->flags & SEC_THREAD_LOCAL) != 0))))
13705 {
13706 if (tls_mask != 0
13707 && (r_type == R_PPC64_TLS
13708 || r_type == R_PPC64_TLSGD
13709 || r_type == R_PPC64_TLSLD))
13710 /* R_PPC64_TLS is OK against a symbol in the TOC. */
13711 ;
13712 else
13713 info->callbacks->einfo
13714 (!IS_PPC64_TLS_RELOC (r_type)
13715 /* xgettext:c-format */
13716 ? _("%H: %s used with TLS symbol `%T'\n")
13717 /* xgettext:c-format */
13718 : _("%H: %s used with non-TLS symbol `%T'\n"),
13719 input_bfd, input_section, rel->r_offset,
13720 ppc64_elf_howto_table[r_type]->name,
13721 sym_name);
13722 }
13723
13724 /* Ensure reloc mapping code below stays sane. */
13725 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
13726 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
13727 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
13728 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
13729 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
13730 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
13731 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
13732 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
13733 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
13734 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
13735 abort ();
13736
13737 switch (r_type)
13738 {
13739 default:
13740 break;
13741
13742 case R_PPC64_LO_DS_OPT:
13743 insn = bfd_get_32 (input_bfd, contents + rel->r_offset - d_offset);
13744 if ((insn & (0x3f << 26)) != 58u << 26)
13745 abort ();
13746 insn += (14u << 26) - (58u << 26);
13747 bfd_put_32 (input_bfd, insn, contents + rel->r_offset - d_offset);
13748 r_type = R_PPC64_TOC16_LO;
13749 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13750 break;
13751
13752 case R_PPC64_TOC16:
13753 case R_PPC64_TOC16_LO:
13754 case R_PPC64_TOC16_DS:
13755 case R_PPC64_TOC16_LO_DS:
13756 {
13757 /* Check for toc tls entries. */
13758 unsigned char *toc_tls;
13759 int retval;
13760
13761 retval = get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
13762 &local_syms, rel, input_bfd);
13763 if (retval == 0)
13764 return FALSE;
13765
13766 if (toc_tls)
13767 {
13768 tls_mask = *toc_tls;
13769 if (r_type == R_PPC64_TOC16_DS
13770 || r_type == R_PPC64_TOC16_LO_DS)
13771 {
13772 if (tls_mask != 0
13773 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
13774 goto toctprel;
13775 }
13776 else
13777 {
13778 /* If we found a GD reloc pair, then we might be
13779 doing a GD->IE transition. */
13780 if (retval == 2)
13781 {
13782 tls_gd = TLS_TPRELGD;
13783 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13784 goto tls_ldgd_opt;
13785 }
13786 else if (retval == 3)
13787 {
13788 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13789 goto tls_ldgd_opt;
13790 }
13791 }
13792 }
13793 }
13794 break;
13795
13796 case R_PPC64_GOT_TPREL16_HI:
13797 case R_PPC64_GOT_TPREL16_HA:
13798 if (tls_mask != 0
13799 && (tls_mask & TLS_TPREL) == 0)
13800 {
13801 rel->r_offset -= d_offset;
13802 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
13803 r_type = R_PPC64_NONE;
13804 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13805 }
13806 break;
13807
13808 case R_PPC64_GOT_TPREL16_DS:
13809 case R_PPC64_GOT_TPREL16_LO_DS:
13810 if (tls_mask != 0
13811 && (tls_mask & TLS_TPREL) == 0)
13812 {
13813 toctprel:
13814 insn = bfd_get_32 (input_bfd,
13815 contents + rel->r_offset - d_offset);
13816 insn &= 31 << 21;
13817 insn |= 0x3c0d0000; /* addis 0,13,0 */
13818 bfd_put_32 (input_bfd, insn,
13819 contents + rel->r_offset - d_offset);
13820 r_type = R_PPC64_TPREL16_HA;
13821 if (toc_symndx != 0)
13822 {
13823 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
13824 rel->r_addend = toc_addend;
13825 /* We changed the symbol. Start over in order to
13826 get h, sym, sec etc. right. */
13827 goto again;
13828 }
13829 else
13830 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13831 }
13832 break;
13833
13834 case R_PPC64_TLS:
13835 if (tls_mask != 0
13836 && (tls_mask & TLS_TPREL) == 0)
13837 {
13838 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
13839 insn = _bfd_elf_ppc_at_tls_transform (insn, 13);
13840 if (insn == 0)
13841 abort ();
13842 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
13843 /* Was PPC64_TLS which sits on insn boundary, now
13844 PPC64_TPREL16_LO which is at low-order half-word. */
13845 rel->r_offset += d_offset;
13846 r_type = R_PPC64_TPREL16_LO;
13847 if (toc_symndx != 0)
13848 {
13849 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
13850 rel->r_addend = toc_addend;
13851 /* We changed the symbol. Start over in order to
13852 get h, sym, sec etc. right. */
13853 goto again;
13854 }
13855 else
13856 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13857 }
13858 break;
13859
13860 case R_PPC64_GOT_TLSGD16_HI:
13861 case R_PPC64_GOT_TLSGD16_HA:
13862 tls_gd = TLS_TPRELGD;
13863 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13864 goto tls_gdld_hi;
13865 break;
13866
13867 case R_PPC64_GOT_TLSLD16_HI:
13868 case R_PPC64_GOT_TLSLD16_HA:
13869 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13870 {
13871 tls_gdld_hi:
13872 if ((tls_mask & tls_gd) != 0)
13873 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
13874 + R_PPC64_GOT_TPREL16_DS);
13875 else
13876 {
13877 rel->r_offset -= d_offset;
13878 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
13879 r_type = R_PPC64_NONE;
13880 }
13881 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13882 }
13883 break;
13884
13885 case R_PPC64_GOT_TLSGD16:
13886 case R_PPC64_GOT_TLSGD16_LO:
13887 tls_gd = TLS_TPRELGD;
13888 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13889 goto tls_ldgd_opt;
13890 break;
13891
13892 case R_PPC64_GOT_TLSLD16:
13893 case R_PPC64_GOT_TLSLD16_LO:
13894 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13895 {
13896 unsigned int insn1, insn2, insn3;
13897 bfd_vma offset;
13898
13899 tls_ldgd_opt:
13900 offset = (bfd_vma) -1;
13901 /* If not using the newer R_PPC64_TLSGD/LD to mark
13902 __tls_get_addr calls, we must trust that the call
13903 stays with its arg setup insns, ie. that the next
13904 reloc is the __tls_get_addr call associated with
13905 the current reloc. Edit both insns. */
13906 if (input_section->has_tls_get_addr_call
13907 && rel + 1 < relend
13908 && branch_reloc_hash_match (input_bfd, rel + 1,
13909 htab->tls_get_addr,
13910 htab->tls_get_addr_fd))
13911 offset = rel[1].r_offset;
13912 /* We read the low GOT_TLS (or TOC16) insn because we
13913 need to keep the destination reg. It may be
13914 something other than the usual r3, and moved to r3
13915 before the call by intervening code. */
13916 insn1 = bfd_get_32 (input_bfd,
13917 contents + rel->r_offset - d_offset);
13918 if ((tls_mask & tls_gd) != 0)
13919 {
13920 /* IE */
13921 insn1 &= (0x1f << 21) | (0x1f << 16);
13922 insn1 |= 58 << 26; /* ld */
13923 insn2 = 0x7c636a14; /* add 3,3,13 */
13924 if (offset != (bfd_vma) -1)
13925 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13926 if ((tls_mask & TLS_EXPLICIT) == 0)
13927 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
13928 + R_PPC64_GOT_TPREL16_DS);
13929 else
13930 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
13931 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13932 }
13933 else
13934 {
13935 /* LE */
13936 insn1 &= 0x1f << 21;
13937 insn1 |= 0x3c0d0000; /* addis r,13,0 */
13938 insn2 = 0x38630000; /* addi 3,3,0 */
13939 if (tls_gd == 0)
13940 {
13941 /* Was an LD reloc. */
13942 if (toc_symndx)
13943 sec = local_sections[toc_symndx];
13944 for (r_symndx = 0;
13945 r_symndx < symtab_hdr->sh_info;
13946 r_symndx++)
13947 if (local_sections[r_symndx] == sec)
13948 break;
13949 if (r_symndx >= symtab_hdr->sh_info)
13950 r_symndx = STN_UNDEF;
13951 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
13952 if (r_symndx != STN_UNDEF)
13953 rel->r_addend -= (local_syms[r_symndx].st_value
13954 + sec->output_offset
13955 + sec->output_section->vma);
13956 }
13957 else if (toc_symndx != 0)
13958 {
13959 r_symndx = toc_symndx;
13960 rel->r_addend = toc_addend;
13961 }
13962 r_type = R_PPC64_TPREL16_HA;
13963 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13964 if (offset != (bfd_vma) -1)
13965 {
13966 rel[1].r_info = ELF64_R_INFO (r_symndx,
13967 R_PPC64_TPREL16_LO);
13968 rel[1].r_offset = offset + d_offset;
13969 rel[1].r_addend = rel->r_addend;
13970 }
13971 }
13972 bfd_put_32 (input_bfd, insn1,
13973 contents + rel->r_offset - d_offset);
13974 if (offset != (bfd_vma) -1)
13975 {
13976 insn3 = bfd_get_32 (input_bfd,
13977 contents + offset + 4);
13978 if (insn3 == NOP
13979 || insn3 == CROR_151515 || insn3 == CROR_313131)
13980 {
13981 rel[1].r_offset += 4;
13982 bfd_put_32 (input_bfd, insn2, contents + offset + 4);
13983 insn2 = NOP;
13984 }
13985 bfd_put_32 (input_bfd, insn2, contents + offset);
13986 }
13987 if ((tls_mask & tls_gd) == 0
13988 && (tls_gd == 0 || toc_symndx != 0))
13989 {
13990 /* We changed the symbol. Start over in order
13991 to get h, sym, sec etc. right. */
13992 goto again;
13993 }
13994 }
13995 break;
13996
13997 case R_PPC64_TLSGD:
13998 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13999 {
14000 unsigned int insn2, insn3;
14001 bfd_vma offset = rel->r_offset;
14002
14003 if ((tls_mask & TLS_TPRELGD) != 0)
14004 {
14005 /* IE */
14006 r_type = R_PPC64_NONE;
14007 insn2 = 0x7c636a14; /* add 3,3,13 */
14008 }
14009 else
14010 {
14011 /* LE */
14012 if (toc_symndx != 0)
14013 {
14014 r_symndx = toc_symndx;
14015 rel->r_addend = toc_addend;
14016 }
14017 r_type = R_PPC64_TPREL16_LO;
14018 rel->r_offset = offset + d_offset;
14019 insn2 = 0x38630000; /* addi 3,3,0 */
14020 }
14021 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14022 /* Zap the reloc on the _tls_get_addr call too. */
14023 BFD_ASSERT (offset == rel[1].r_offset);
14024 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
14025 insn3 = bfd_get_32 (input_bfd,
14026 contents + offset + 4);
14027 if (insn3 == NOP
14028 || insn3 == CROR_151515 || insn3 == CROR_313131)
14029 {
14030 rel->r_offset += 4;
14031 bfd_put_32 (input_bfd, insn2, contents + offset + 4);
14032 insn2 = NOP;
14033 }
14034 bfd_put_32 (input_bfd, insn2, contents + offset);
14035 if ((tls_mask & TLS_TPRELGD) == 0 && toc_symndx != 0)
14036 goto again;
14037 }
14038 break;
14039
14040 case R_PPC64_TLSLD:
14041 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
14042 {
14043 unsigned int insn2, insn3;
14044 bfd_vma offset = rel->r_offset;
14045
14046 if (toc_symndx)
14047 sec = local_sections[toc_symndx];
14048 for (r_symndx = 0;
14049 r_symndx < symtab_hdr->sh_info;
14050 r_symndx++)
14051 if (local_sections[r_symndx] == sec)
14052 break;
14053 if (r_symndx >= symtab_hdr->sh_info)
14054 r_symndx = STN_UNDEF;
14055 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
14056 if (r_symndx != STN_UNDEF)
14057 rel->r_addend -= (local_syms[r_symndx].st_value
14058 + sec->output_offset
14059 + sec->output_section->vma);
14060
14061 r_type = R_PPC64_TPREL16_LO;
14062 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14063 rel->r_offset = offset + d_offset;
14064 /* Zap the reloc on the _tls_get_addr call too. */
14065 BFD_ASSERT (offset == rel[1].r_offset);
14066 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
14067 insn2 = 0x38630000; /* addi 3,3,0 */
14068 insn3 = bfd_get_32 (input_bfd,
14069 contents + offset + 4);
14070 if (insn3 == NOP
14071 || insn3 == CROR_151515 || insn3 == CROR_313131)
14072 {
14073 rel->r_offset += 4;
14074 bfd_put_32 (input_bfd, insn2, contents + offset + 4);
14075 insn2 = NOP;
14076 }
14077 bfd_put_32 (input_bfd, insn2, contents + offset);
14078 goto again;
14079 }
14080 break;
14081
14082 case R_PPC64_DTPMOD64:
14083 if (rel + 1 < relend
14084 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
14085 && rel[1].r_offset == rel->r_offset + 8)
14086 {
14087 if ((tls_mask & TLS_GD) == 0)
14088 {
14089 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
14090 if ((tls_mask & TLS_TPRELGD) != 0)
14091 r_type = R_PPC64_TPREL64;
14092 else
14093 {
14094 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
14095 r_type = R_PPC64_NONE;
14096 }
14097 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14098 }
14099 }
14100 else
14101 {
14102 if ((tls_mask & TLS_LD) == 0)
14103 {
14104 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
14105 r_type = R_PPC64_NONE;
14106 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14107 }
14108 }
14109 break;
14110
14111 case R_PPC64_TPREL64:
14112 if ((tls_mask & TLS_TPREL) == 0)
14113 {
14114 r_type = R_PPC64_NONE;
14115 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14116 }
14117 break;
14118
14119 case R_PPC64_ENTRY:
14120 relocation = TOCstart + htab->sec_info[input_section->id].toc_off;
14121 if (!bfd_link_pic (info)
14122 && !info->traditional_format
14123 && relocation + 0x80008000 <= 0xffffffff)
14124 {
14125 unsigned int insn1, insn2;
14126
14127 insn1 = bfd_get_32 (input_bfd, contents + rel->r_offset);
14128 insn2 = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
14129 if ((insn1 & ~0xfffc) == LD_R2_0R12
14130 && insn2 == ADD_R2_R2_R12)
14131 {
14132 bfd_put_32 (input_bfd,
14133 LIS_R2 + PPC_HA (relocation),
14134 contents + rel->r_offset);
14135 bfd_put_32 (input_bfd,
14136 ADDI_R2_R2 + PPC_LO (relocation),
14137 contents + rel->r_offset + 4);
14138 }
14139 }
14140 else
14141 {
14142 relocation -= (rel->r_offset
14143 + input_section->output_offset
14144 + input_section->output_section->vma);
14145 if (relocation + 0x80008000 <= 0xffffffff)
14146 {
14147 unsigned int insn1, insn2;
14148
14149 insn1 = bfd_get_32 (input_bfd, contents + rel->r_offset);
14150 insn2 = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
14151 if ((insn1 & ~0xfffc) == LD_R2_0R12
14152 && insn2 == ADD_R2_R2_R12)
14153 {
14154 bfd_put_32 (input_bfd,
14155 ADDIS_R2_R12 + PPC_HA (relocation),
14156 contents + rel->r_offset);
14157 bfd_put_32 (input_bfd,
14158 ADDI_R2_R2 + PPC_LO (relocation),
14159 contents + rel->r_offset + 4);
14160 }
14161 }
14162 }
14163 break;
14164
14165 case R_PPC64_REL16_HA:
14166 /* If we are generating a non-PIC executable, edit
14167 . 0: addis 2,12,.TOC.-0b@ha
14168 . addi 2,2,.TOC.-0b@l
14169 used by ELFv2 global entry points to set up r2, to
14170 . lis 2,.TOC.@ha
14171 . addi 2,2,.TOC.@l
14172 if .TOC. is in range. */
14173 if (!bfd_link_pic (info)
14174 && !info->traditional_format
14175 && !htab->opd_abi
14176 && rel->r_addend == d_offset
14177 && h != NULL && &h->elf == htab->elf.hgot
14178 && rel + 1 < relend
14179 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_REL16_LO)
14180 && rel[1].r_offset == rel->r_offset + 4
14181 && rel[1].r_addend == rel->r_addend + 4
14182 && relocation + 0x80008000 <= 0xffffffff)
14183 {
14184 unsigned int insn1, insn2;
14185 bfd_vma offset = rel->r_offset - d_offset;
14186 insn1 = bfd_get_32 (input_bfd, contents + offset);
14187 insn2 = bfd_get_32 (input_bfd, contents + offset + 4);
14188 if ((insn1 & 0xffff0000) == ADDIS_R2_R12
14189 && (insn2 & 0xffff0000) == ADDI_R2_R2)
14190 {
14191 r_type = R_PPC64_ADDR16_HA;
14192 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14193 rel->r_addend -= d_offset;
14194 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_ADDR16_LO);
14195 rel[1].r_addend -= d_offset + 4;
14196 bfd_put_32 (input_bfd, LIS_R2, contents + offset);
14197 }
14198 }
14199 break;
14200 }
14201
14202 /* Handle other relocations that tweak non-addend part of insn. */
14203 insn = 0;
14204 max_br_offset = 1 << 25;
14205 addend = rel->r_addend;
14206 reloc_dest = DEST_NORMAL;
14207 switch (r_type)
14208 {
14209 default:
14210 break;
14211
14212 case R_PPC64_TOCSAVE:
14213 if (relocation + addend == (rel->r_offset
14214 + input_section->output_offset
14215 + input_section->output_section->vma)
14216 && tocsave_find (htab, NO_INSERT,
14217 &local_syms, rel, input_bfd))
14218 {
14219 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
14220 if (insn == NOP
14221 || insn == CROR_151515 || insn == CROR_313131)
14222 bfd_put_32 (input_bfd,
14223 STD_R2_0R1 + STK_TOC (htab),
14224 contents + rel->r_offset);
14225 }
14226 break;
14227
14228 /* Branch taken prediction relocations. */
14229 case R_PPC64_ADDR14_BRTAKEN:
14230 case R_PPC64_REL14_BRTAKEN:
14231 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
14232 /* Fall through. */
14233
14234 /* Branch not taken prediction relocations. */
14235 case R_PPC64_ADDR14_BRNTAKEN:
14236 case R_PPC64_REL14_BRNTAKEN:
14237 insn |= bfd_get_32 (input_bfd,
14238 contents + rel->r_offset) & ~(0x01 << 21);
14239 /* Fall through. */
14240
14241 case R_PPC64_REL14:
14242 max_br_offset = 1 << 15;
14243 /* Fall through. */
14244
14245 case R_PPC64_REL24:
14246 /* Calls to functions with a different TOC, such as calls to
14247 shared objects, need to alter the TOC pointer. This is
14248 done using a linkage stub. A REL24 branching to these
14249 linkage stubs needs to be followed by a nop, as the nop
14250 will be replaced with an instruction to restore the TOC
14251 base pointer. */
14252 fdh = h;
14253 if (h != NULL
14254 && h->oh != NULL
14255 && h->oh->is_func_descriptor)
14256 fdh = ppc_follow_link (h->oh);
14257 stub_entry = ppc_get_stub_entry (input_section, sec, fdh, &orig_rel,
14258 htab);
14259 if (stub_entry != NULL
14260 && (stub_entry->stub_type == ppc_stub_plt_call
14261 || stub_entry->stub_type == ppc_stub_plt_call_r2save
14262 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
14263 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
14264 {
14265 bfd_boolean can_plt_call = FALSE;
14266
14267 if (stub_entry->stub_type == ppc_stub_plt_call
14268 && !htab->opd_abi
14269 && htab->params->plt_localentry0 != 0
14270 && is_elfv2_localentry0 (&h->elf))
14271 {
14272 /* The function doesn't use or change r2. */
14273 can_plt_call = TRUE;
14274 }
14275
14276 /* All of these stubs may modify r2, so there must be a
14277 branch and link followed by a nop. The nop is
14278 replaced by an insn to restore r2. */
14279 else if (rel->r_offset + 8 <= input_section->size)
14280 {
14281 unsigned long br;
14282
14283 br = bfd_get_32 (input_bfd,
14284 contents + rel->r_offset);
14285 if ((br & 1) != 0)
14286 {
14287 unsigned long nop;
14288
14289 nop = bfd_get_32 (input_bfd,
14290 contents + rel->r_offset + 4);
14291 if (nop == NOP
14292 || nop == CROR_151515 || nop == CROR_313131)
14293 {
14294 if (h != NULL
14295 && (h == htab->tls_get_addr_fd
14296 || h == htab->tls_get_addr)
14297 && htab->params->tls_get_addr_opt)
14298 {
14299 /* Special stub used, leave nop alone. */
14300 }
14301 else
14302 bfd_put_32 (input_bfd,
14303 LD_R2_0R1 + STK_TOC (htab),
14304 contents + rel->r_offset + 4);
14305 can_plt_call = TRUE;
14306 }
14307 }
14308 }
14309
14310 if (!can_plt_call && h != NULL)
14311 {
14312 const char *name = h->elf.root.root.string;
14313
14314 if (*name == '.')
14315 ++name;
14316
14317 if (strncmp (name, "__libc_start_main", 17) == 0
14318 && (name[17] == 0 || name[17] == '@'))
14319 {
14320 /* Allow crt1 branch to go via a toc adjusting
14321 stub. Other calls that never return could do
14322 the same, if we could detect such. */
14323 can_plt_call = TRUE;
14324 }
14325 }
14326
14327 if (!can_plt_call)
14328 {
14329 /* g++ as of 20130507 emits self-calls without a
14330 following nop. This is arguably wrong since we
14331 have conflicting information. On the one hand a
14332 global symbol and on the other a local call
14333 sequence, but don't error for this special case.
14334 It isn't possible to cheaply verify we have
14335 exactly such a call. Allow all calls to the same
14336 section. */
14337 asection *code_sec = sec;
14338
14339 if (get_opd_info (sec) != NULL)
14340 {
14341 bfd_vma off = (relocation + addend
14342 - sec->output_section->vma
14343 - sec->output_offset);
14344
14345 opd_entry_value (sec, off, &code_sec, NULL, FALSE);
14346 }
14347 if (code_sec == input_section)
14348 can_plt_call = TRUE;
14349 }
14350
14351 if (!can_plt_call)
14352 {
14353 if (stub_entry->stub_type == ppc_stub_plt_call
14354 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14355 info->callbacks->einfo
14356 /* xgettext:c-format */
14357 (_("%H: call to `%T' lacks nop, can't restore toc; "
14358 "recompile with -fPIC\n"),
14359 input_bfd, input_section, rel->r_offset, sym_name);
14360 else
14361 info->callbacks->einfo
14362 /* xgettext:c-format */
14363 (_("%H: call to `%T' lacks nop, can't restore toc; "
14364 "(-mcmodel=small toc adjust stub)\n"),
14365 input_bfd, input_section, rel->r_offset, sym_name);
14366
14367 bfd_set_error (bfd_error_bad_value);
14368 ret = FALSE;
14369 }
14370
14371 if (can_plt_call
14372 && (stub_entry->stub_type == ppc_stub_plt_call
14373 || stub_entry->stub_type == ppc_stub_plt_call_r2save))
14374 unresolved_reloc = FALSE;
14375 }
14376
14377 if ((stub_entry == NULL
14378 || stub_entry->stub_type == ppc_stub_long_branch
14379 || stub_entry->stub_type == ppc_stub_plt_branch)
14380 && get_opd_info (sec) != NULL)
14381 {
14382 /* The branch destination is the value of the opd entry. */
14383 bfd_vma off = (relocation + addend
14384 - sec->output_section->vma
14385 - sec->output_offset);
14386 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL, FALSE);
14387 if (dest != (bfd_vma) -1)
14388 {
14389 relocation = dest;
14390 addend = 0;
14391 reloc_dest = DEST_OPD;
14392 }
14393 }
14394
14395 /* If the branch is out of reach we ought to have a long
14396 branch stub. */
14397 from = (rel->r_offset
14398 + input_section->output_offset
14399 + input_section->output_section->vma);
14400
14401 relocation += PPC64_LOCAL_ENTRY_OFFSET (fdh
14402 ? fdh->elf.other
14403 : sym->st_other);
14404
14405 if (stub_entry != NULL
14406 && (stub_entry->stub_type == ppc_stub_long_branch
14407 || stub_entry->stub_type == ppc_stub_plt_branch)
14408 && (r_type == R_PPC64_ADDR14_BRTAKEN
14409 || r_type == R_PPC64_ADDR14_BRNTAKEN
14410 || (relocation + addend - from + max_br_offset
14411 < 2 * max_br_offset)))
14412 /* Don't use the stub if this branch is in range. */
14413 stub_entry = NULL;
14414
14415 if (stub_entry != NULL)
14416 {
14417 /* Munge up the value and addend so that we call the stub
14418 rather than the procedure directly. */
14419 asection *stub_sec = stub_entry->group->stub_sec;
14420
14421 if (stub_entry->stub_type == ppc_stub_save_res)
14422 relocation += (stub_sec->output_offset
14423 + stub_sec->output_section->vma
14424 + stub_sec->size - htab->sfpr->size
14425 - htab->sfpr->output_offset
14426 - htab->sfpr->output_section->vma);
14427 else
14428 relocation = (stub_entry->stub_offset
14429 + stub_sec->output_offset
14430 + stub_sec->output_section->vma);
14431 addend = 0;
14432 reloc_dest = DEST_STUB;
14433
14434 if ((stub_entry->stub_type == ppc_stub_plt_call
14435 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14436 && (ALWAYS_EMIT_R2SAVE
14437 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14438 && rel + 1 < relend
14439 && rel[1].r_offset == rel->r_offset + 4
14440 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOCSAVE)
14441 relocation += 4;
14442 }
14443
14444 if (insn != 0)
14445 {
14446 if (is_isa_v2)
14447 {
14448 /* Set 'a' bit. This is 0b00010 in BO field for branch
14449 on CR(BI) insns (BO == 001at or 011at), and 0b01000
14450 for branch on CTR insns (BO == 1a00t or 1a01t). */
14451 if ((insn & (0x14 << 21)) == (0x04 << 21))
14452 insn |= 0x02 << 21;
14453 else if ((insn & (0x14 << 21)) == (0x10 << 21))
14454 insn |= 0x08 << 21;
14455 else
14456 break;
14457 }
14458 else
14459 {
14460 /* Invert 'y' bit if not the default. */
14461 if ((bfd_signed_vma) (relocation + addend - from) < 0)
14462 insn ^= 0x01 << 21;
14463 }
14464
14465 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
14466 }
14467
14468 /* NOP out calls to undefined weak functions.
14469 We can thus call a weak function without first
14470 checking whether the function is defined. */
14471 else if (h != NULL
14472 && h->elf.root.type == bfd_link_hash_undefweak
14473 && h->elf.dynindx == -1
14474 && r_type == R_PPC64_REL24
14475 && relocation == 0
14476 && addend == 0)
14477 {
14478 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
14479 goto copy_reloc;
14480 }
14481 break;
14482 }
14483
14484 /* Set `addend'. */
14485 tls_type = 0;
14486 switch (r_type)
14487 {
14488 default:
14489 info->callbacks->einfo
14490 /* xgettext:c-format */
14491 (_("%P: %B: unknown relocation type %d for `%T'\n"),
14492 input_bfd, (int) r_type, sym_name);
14493
14494 bfd_set_error (bfd_error_bad_value);
14495 ret = FALSE;
14496 goto copy_reloc;
14497
14498 case R_PPC64_NONE:
14499 case R_PPC64_TLS:
14500 case R_PPC64_TLSGD:
14501 case R_PPC64_TLSLD:
14502 case R_PPC64_TOCSAVE:
14503 case R_PPC64_GNU_VTINHERIT:
14504 case R_PPC64_GNU_VTENTRY:
14505 case R_PPC64_ENTRY:
14506 goto copy_reloc;
14507
14508 /* GOT16 relocations. Like an ADDR16 using the symbol's
14509 address in the GOT as relocation value instead of the
14510 symbol's value itself. Also, create a GOT entry for the
14511 symbol and put the symbol value there. */
14512 case R_PPC64_GOT_TLSGD16:
14513 case R_PPC64_GOT_TLSGD16_LO:
14514 case R_PPC64_GOT_TLSGD16_HI:
14515 case R_PPC64_GOT_TLSGD16_HA:
14516 tls_type = TLS_TLS | TLS_GD;
14517 goto dogot;
14518
14519 case R_PPC64_GOT_TLSLD16:
14520 case R_PPC64_GOT_TLSLD16_LO:
14521 case R_PPC64_GOT_TLSLD16_HI:
14522 case R_PPC64_GOT_TLSLD16_HA:
14523 tls_type = TLS_TLS | TLS_LD;
14524 goto dogot;
14525
14526 case R_PPC64_GOT_TPREL16_DS:
14527 case R_PPC64_GOT_TPREL16_LO_DS:
14528 case R_PPC64_GOT_TPREL16_HI:
14529 case R_PPC64_GOT_TPREL16_HA:
14530 tls_type = TLS_TLS | TLS_TPREL;
14531 goto dogot;
14532
14533 case R_PPC64_GOT_DTPREL16_DS:
14534 case R_PPC64_GOT_DTPREL16_LO_DS:
14535 case R_PPC64_GOT_DTPREL16_HI:
14536 case R_PPC64_GOT_DTPREL16_HA:
14537 tls_type = TLS_TLS | TLS_DTPREL;
14538 goto dogot;
14539
14540 case R_PPC64_GOT16:
14541 case R_PPC64_GOT16_LO:
14542 case R_PPC64_GOT16_HI:
14543 case R_PPC64_GOT16_HA:
14544 case R_PPC64_GOT16_DS:
14545 case R_PPC64_GOT16_LO_DS:
14546 dogot:
14547 {
14548 /* Relocation is to the entry for this symbol in the global
14549 offset table. */
14550 asection *got;
14551 bfd_vma *offp;
14552 bfd_vma off;
14553 unsigned long indx = 0;
14554 struct got_entry *ent;
14555
14556 if (tls_type == (TLS_TLS | TLS_LD)
14557 && (h == NULL
14558 || !h->elf.def_dynamic))
14559 ent = ppc64_tlsld_got (input_bfd);
14560 else
14561 {
14562 if (h != NULL)
14563 {
14564 if (!htab->elf.dynamic_sections_created
14565 || h->elf.dynindx == -1
14566 || SYMBOL_REFERENCES_LOCAL (info, &h->elf)
14567 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, &h->elf))
14568 /* This is actually a static link, or it is a
14569 -Bsymbolic link and the symbol is defined
14570 locally, or the symbol was forced to be local
14571 because of a version file. */
14572 ;
14573 else
14574 {
14575 indx = h->elf.dynindx;
14576 unresolved_reloc = FALSE;
14577 }
14578 ent = h->elf.got.glist;
14579 }
14580 else
14581 {
14582 if (local_got_ents == NULL)
14583 abort ();
14584 ent = local_got_ents[r_symndx];
14585 }
14586
14587 for (; ent != NULL; ent = ent->next)
14588 if (ent->addend == orig_rel.r_addend
14589 && ent->owner == input_bfd
14590 && ent->tls_type == tls_type)
14591 break;
14592 }
14593
14594 if (ent == NULL)
14595 abort ();
14596 if (ent->is_indirect)
14597 ent = ent->got.ent;
14598 offp = &ent->got.offset;
14599 got = ppc64_elf_tdata (ent->owner)->got;
14600 if (got == NULL)
14601 abort ();
14602
14603 /* The offset must always be a multiple of 8. We use the
14604 least significant bit to record whether we have already
14605 processed this entry. */
14606 off = *offp;
14607 if ((off & 1) != 0)
14608 off &= ~1;
14609 else
14610 {
14611 /* Generate relocs for the dynamic linker, except in
14612 the case of TLSLD where we'll use one entry per
14613 module. */
14614 asection *relgot;
14615 bfd_boolean ifunc;
14616
14617 *offp = off | 1;
14618 relgot = NULL;
14619 ifunc = (h != NULL
14620 ? h->elf.type == STT_GNU_IFUNC
14621 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC);
14622 if (ifunc)
14623 {
14624 relgot = htab->elf.irelplt;
14625 if (indx == 0)
14626 htab->local_ifunc_resolver = 1;
14627 else if (is_static_defined (&h->elf))
14628 htab->maybe_local_ifunc_resolver = 1;
14629 }
14630 else if (indx != 0
14631 || (bfd_link_pic (info)
14632 && (h == NULL
14633 || !UNDEFWEAK_NO_DYNAMIC_RELOC (info, &h->elf)
14634 || (tls_type == (TLS_TLS | TLS_LD)
14635 && !h->elf.def_dynamic))))
14636 relgot = ppc64_elf_tdata (ent->owner)->relgot;
14637 if (relgot != NULL)
14638 {
14639 outrel.r_offset = (got->output_section->vma
14640 + got->output_offset
14641 + off);
14642 outrel.r_addend = addend;
14643 if (tls_type & (TLS_LD | TLS_GD))
14644 {
14645 outrel.r_addend = 0;
14646 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
14647 if (tls_type == (TLS_TLS | TLS_GD))
14648 {
14649 loc = relgot->contents;
14650 loc += (relgot->reloc_count++
14651 * sizeof (Elf64_External_Rela));
14652 bfd_elf64_swap_reloca_out (output_bfd,
14653 &outrel, loc);
14654 outrel.r_offset += 8;
14655 outrel.r_addend = addend;
14656 outrel.r_info
14657 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
14658 }
14659 }
14660 else if (tls_type == (TLS_TLS | TLS_DTPREL))
14661 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
14662 else if (tls_type == (TLS_TLS | TLS_TPREL))
14663 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
14664 else if (indx != 0)
14665 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
14666 else
14667 {
14668 if (ifunc)
14669 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
14670 else
14671 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
14672
14673 /* Write the .got section contents for the sake
14674 of prelink. */
14675 loc = got->contents + off;
14676 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
14677 loc);
14678 }
14679
14680 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
14681 {
14682 outrel.r_addend += relocation;
14683 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
14684 {
14685 if (htab->elf.tls_sec == NULL)
14686 outrel.r_addend = 0;
14687 else
14688 outrel.r_addend -= htab->elf.tls_sec->vma;
14689 }
14690 }
14691 loc = relgot->contents;
14692 loc += (relgot->reloc_count++
14693 * sizeof (Elf64_External_Rela));
14694 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
14695 }
14696
14697 /* Init the .got section contents here if we're not
14698 emitting a reloc. */
14699 else
14700 {
14701 relocation += addend;
14702 if (tls_type != 0)
14703 {
14704 if (htab->elf.tls_sec == NULL)
14705 relocation = 0;
14706 else
14707 {
14708 if (tls_type & TLS_LD)
14709 relocation = 0;
14710 else
14711 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
14712 if (tls_type & TLS_TPREL)
14713 relocation += DTP_OFFSET - TP_OFFSET;
14714 }
14715
14716 if (tls_type & (TLS_GD | TLS_LD))
14717 {
14718 bfd_put_64 (output_bfd, relocation,
14719 got->contents + off + 8);
14720 relocation = 1;
14721 }
14722 }
14723 bfd_put_64 (output_bfd, relocation,
14724 got->contents + off);
14725 }
14726 }
14727
14728 if (off >= (bfd_vma) -2)
14729 abort ();
14730
14731 relocation = got->output_section->vma + got->output_offset + off;
14732 addend = -(TOCstart + htab->sec_info[input_section->id].toc_off);
14733 }
14734 break;
14735
14736 case R_PPC64_PLT16_HA:
14737 case R_PPC64_PLT16_HI:
14738 case R_PPC64_PLT16_LO:
14739 case R_PPC64_PLT32:
14740 case R_PPC64_PLT64:
14741 /* Relocation is to the entry for this symbol in the
14742 procedure linkage table. */
14743 {
14744 struct plt_entry **plt_list = NULL;
14745 if (h != NULL)
14746 plt_list = &h->elf.plt.plist;
14747 else if (local_got_ents != NULL)
14748 {
14749 struct plt_entry **local_plt = (struct plt_entry **)
14750 (local_got_ents + symtab_hdr->sh_info);
14751 unsigned char *local_got_tls_masks = (unsigned char *)
14752 (local_plt + symtab_hdr->sh_info);
14753 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
14754 plt_list = local_plt + r_symndx;
14755 }
14756 if (plt_list)
14757 {
14758 struct plt_entry *ent;
14759
14760 for (ent = *plt_list; ent != NULL; ent = ent->next)
14761 if (ent->plt.offset != (bfd_vma) -1
14762 && ent->addend == orig_rel.r_addend)
14763 {
14764 asection *plt;
14765
14766 plt = htab->elf.splt;
14767 if (!htab->elf.dynamic_sections_created
14768 || h == NULL
14769 || h->elf.dynindx == -1)
14770 plt = htab->elf.iplt;
14771 relocation = (plt->output_section->vma
14772 + plt->output_offset
14773 + ent->plt.offset);
14774 addend = 0;
14775 unresolved_reloc = FALSE;
14776 break;
14777 }
14778 }
14779 }
14780 break;
14781
14782 case R_PPC64_TOC:
14783 /* Relocation value is TOC base. */
14784 relocation = TOCstart;
14785 if (r_symndx == STN_UNDEF)
14786 relocation += htab->sec_info[input_section->id].toc_off;
14787 else if (unresolved_reloc)
14788 ;
14789 else if (sec != NULL && sec->id < htab->sec_info_arr_size)
14790 relocation += htab->sec_info[sec->id].toc_off;
14791 else
14792 unresolved_reloc = TRUE;
14793 goto dodyn;
14794
14795 /* TOC16 relocs. We want the offset relative to the TOC base,
14796 which is the address of the start of the TOC plus 0x8000.
14797 The TOC consists of sections .got, .toc, .tocbss, and .plt,
14798 in this order. */
14799 case R_PPC64_TOC16:
14800 case R_PPC64_TOC16_LO:
14801 case R_PPC64_TOC16_HI:
14802 case R_PPC64_TOC16_DS:
14803 case R_PPC64_TOC16_LO_DS:
14804 case R_PPC64_TOC16_HA:
14805 addend -= TOCstart + htab->sec_info[input_section->id].toc_off;
14806 break;
14807
14808 /* Relocate against the beginning of the section. */
14809 case R_PPC64_SECTOFF:
14810 case R_PPC64_SECTOFF_LO:
14811 case R_PPC64_SECTOFF_HI:
14812 case R_PPC64_SECTOFF_DS:
14813 case R_PPC64_SECTOFF_LO_DS:
14814 case R_PPC64_SECTOFF_HA:
14815 if (sec != NULL)
14816 addend -= sec->output_section->vma;
14817 break;
14818
14819 case R_PPC64_REL16:
14820 case R_PPC64_REL16_LO:
14821 case R_PPC64_REL16_HI:
14822 case R_PPC64_REL16_HA:
14823 case R_PPC64_REL16DX_HA:
14824 break;
14825
14826 case R_PPC64_REL14:
14827 case R_PPC64_REL14_BRNTAKEN:
14828 case R_PPC64_REL14_BRTAKEN:
14829 case R_PPC64_REL24:
14830 break;
14831
14832 case R_PPC64_TPREL16:
14833 case R_PPC64_TPREL16_LO:
14834 case R_PPC64_TPREL16_HI:
14835 case R_PPC64_TPREL16_HA:
14836 case R_PPC64_TPREL16_DS:
14837 case R_PPC64_TPREL16_LO_DS:
14838 case R_PPC64_TPREL16_HIGH:
14839 case R_PPC64_TPREL16_HIGHA:
14840 case R_PPC64_TPREL16_HIGHER:
14841 case R_PPC64_TPREL16_HIGHERA:
14842 case R_PPC64_TPREL16_HIGHEST:
14843 case R_PPC64_TPREL16_HIGHESTA:
14844 if (h != NULL
14845 && h->elf.root.type == bfd_link_hash_undefweak
14846 && h->elf.dynindx == -1)
14847 {
14848 /* Make this relocation against an undefined weak symbol
14849 resolve to zero. This is really just a tweak, since
14850 code using weak externs ought to check that they are
14851 defined before using them. */
14852 bfd_byte *p = contents + rel->r_offset - d_offset;
14853
14854 insn = bfd_get_32 (input_bfd, p);
14855 insn = _bfd_elf_ppc_at_tprel_transform (insn, 13);
14856 if (insn != 0)
14857 bfd_put_32 (input_bfd, insn, p);
14858 break;
14859 }
14860 if (htab->elf.tls_sec != NULL)
14861 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
14862 if (bfd_link_pic (info))
14863 /* The TPREL16 relocs shouldn't really be used in shared
14864 libs as they will result in DT_TEXTREL being set, but
14865 support them anyway. */
14866 goto dodyn;
14867 break;
14868
14869 case R_PPC64_DTPREL16:
14870 case R_PPC64_DTPREL16_LO:
14871 case R_PPC64_DTPREL16_HI:
14872 case R_PPC64_DTPREL16_HA:
14873 case R_PPC64_DTPREL16_DS:
14874 case R_PPC64_DTPREL16_LO_DS:
14875 case R_PPC64_DTPREL16_HIGH:
14876 case R_PPC64_DTPREL16_HIGHA:
14877 case R_PPC64_DTPREL16_HIGHER:
14878 case R_PPC64_DTPREL16_HIGHERA:
14879 case R_PPC64_DTPREL16_HIGHEST:
14880 case R_PPC64_DTPREL16_HIGHESTA:
14881 if (htab->elf.tls_sec != NULL)
14882 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
14883 break;
14884
14885 case R_PPC64_ADDR64_LOCAL:
14886 addend += PPC64_LOCAL_ENTRY_OFFSET (h != NULL
14887 ? h->elf.other
14888 : sym->st_other);
14889 break;
14890
14891 case R_PPC64_DTPMOD64:
14892 relocation = 1;
14893 addend = 0;
14894 goto dodyn;
14895
14896 case R_PPC64_TPREL64:
14897 if (htab->elf.tls_sec != NULL)
14898 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
14899 goto dodyn;
14900
14901 case R_PPC64_DTPREL64:
14902 if (htab->elf.tls_sec != NULL)
14903 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
14904 /* Fall through. */
14905
14906 /* Relocations that may need to be propagated if this is a
14907 dynamic object. */
14908 case R_PPC64_REL30:
14909 case R_PPC64_REL32:
14910 case R_PPC64_REL64:
14911 case R_PPC64_ADDR14:
14912 case R_PPC64_ADDR14_BRNTAKEN:
14913 case R_PPC64_ADDR14_BRTAKEN:
14914 case R_PPC64_ADDR16:
14915 case R_PPC64_ADDR16_DS:
14916 case R_PPC64_ADDR16_HA:
14917 case R_PPC64_ADDR16_HI:
14918 case R_PPC64_ADDR16_HIGH:
14919 case R_PPC64_ADDR16_HIGHA:
14920 case R_PPC64_ADDR16_HIGHER:
14921 case R_PPC64_ADDR16_HIGHERA:
14922 case R_PPC64_ADDR16_HIGHEST:
14923 case R_PPC64_ADDR16_HIGHESTA:
14924 case R_PPC64_ADDR16_LO:
14925 case R_PPC64_ADDR16_LO_DS:
14926 case R_PPC64_ADDR24:
14927 case R_PPC64_ADDR32:
14928 case R_PPC64_ADDR64:
14929 case R_PPC64_UADDR16:
14930 case R_PPC64_UADDR32:
14931 case R_PPC64_UADDR64:
14932 dodyn:
14933 if ((input_section->flags & SEC_ALLOC) == 0)
14934 break;
14935
14936 if (NO_OPD_RELOCS && is_opd)
14937 break;
14938
14939 if (bfd_link_pic (info)
14940 ? ((h == NULL
14941 || h->dyn_relocs != NULL)
14942 && ((h != NULL && pc_dynrelocs (h))
14943 || must_be_dyn_reloc (info, r_type)))
14944 : (h != NULL
14945 ? h->dyn_relocs != NULL
14946 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
14947 {
14948 bfd_boolean skip, relocate;
14949 asection *sreloc;
14950 bfd_vma out_off;
14951 long indx = 0;
14952
14953 /* When generating a dynamic object, these relocations
14954 are copied into the output file to be resolved at run
14955 time. */
14956
14957 skip = FALSE;
14958 relocate = FALSE;
14959
14960 out_off = _bfd_elf_section_offset (output_bfd, info,
14961 input_section, rel->r_offset);
14962 if (out_off == (bfd_vma) -1)
14963 skip = TRUE;
14964 else if (out_off == (bfd_vma) -2)
14965 skip = TRUE, relocate = TRUE;
14966 out_off += (input_section->output_section->vma
14967 + input_section->output_offset);
14968 outrel.r_offset = out_off;
14969 outrel.r_addend = rel->r_addend;
14970
14971 /* Optimize unaligned reloc use. */
14972 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
14973 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
14974 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
14975 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
14976 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
14977 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
14978 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
14979 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
14980 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
14981
14982 if (skip)
14983 memset (&outrel, 0, sizeof outrel);
14984 else if (!SYMBOL_REFERENCES_LOCAL (info, &h->elf)
14985 && !is_opd
14986 && r_type != R_PPC64_TOC)
14987 {
14988 indx = h->elf.dynindx;
14989 BFD_ASSERT (indx != -1);
14990 outrel.r_info = ELF64_R_INFO (indx, r_type);
14991 }
14992 else
14993 {
14994 /* This symbol is local, or marked to become local,
14995 or this is an opd section reloc which must point
14996 at a local function. */
14997 outrel.r_addend += relocation;
14998 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
14999 {
15000 if (is_opd && h != NULL)
15001 {
15002 /* Lie about opd entries. This case occurs
15003 when building shared libraries and we
15004 reference a function in another shared
15005 lib. The same thing happens for a weak
15006 definition in an application that's
15007 overridden by a strong definition in a
15008 shared lib. (I believe this is a generic
15009 bug in binutils handling of weak syms.)
15010 In these cases we won't use the opd
15011 entry in this lib. */
15012 unresolved_reloc = FALSE;
15013 }
15014 if (!is_opd
15015 && r_type == R_PPC64_ADDR64
15016 && (h != NULL
15017 ? h->elf.type == STT_GNU_IFUNC
15018 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
15019 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
15020 else
15021 {
15022 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
15023
15024 /* We need to relocate .opd contents for ld.so.
15025 Prelink also wants simple and consistent rules
15026 for relocs. This make all RELATIVE relocs have
15027 *r_offset equal to r_addend. */
15028 relocate = TRUE;
15029 }
15030 }
15031 else
15032 {
15033 if (h != NULL
15034 ? h->elf.type == STT_GNU_IFUNC
15035 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
15036 {
15037 info->callbacks->einfo
15038 /* xgettext:c-format */
15039 (_("%H: %s for indirect "
15040 "function `%T' unsupported\n"),
15041 input_bfd, input_section, rel->r_offset,
15042 ppc64_elf_howto_table[r_type]->name,
15043 sym_name);
15044 ret = FALSE;
15045 }
15046 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
15047 ;
15048 else if (sec == NULL || sec->owner == NULL)
15049 {
15050 bfd_set_error (bfd_error_bad_value);
15051 return FALSE;
15052 }
15053 else
15054 {
15055 asection *osec;
15056
15057 osec = sec->output_section;
15058 indx = elf_section_data (osec)->dynindx;
15059
15060 if (indx == 0)
15061 {
15062 if ((osec->flags & SEC_READONLY) == 0
15063 && htab->elf.data_index_section != NULL)
15064 osec = htab->elf.data_index_section;
15065 else
15066 osec = htab->elf.text_index_section;
15067 indx = elf_section_data (osec)->dynindx;
15068 }
15069 BFD_ASSERT (indx != 0);
15070
15071 /* We are turning this relocation into one
15072 against a section symbol, so subtract out
15073 the output section's address but not the
15074 offset of the input section in the output
15075 section. */
15076 outrel.r_addend -= osec->vma;
15077 }
15078
15079 outrel.r_info = ELF64_R_INFO (indx, r_type);
15080 }
15081 }
15082
15083 sreloc = elf_section_data (input_section)->sreloc;
15084 if (h != NULL
15085 ? h->elf.type == STT_GNU_IFUNC
15086 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
15087 {
15088 sreloc = htab->elf.irelplt;
15089 if (indx == 0)
15090 htab->local_ifunc_resolver = 1;
15091 else if (is_static_defined (&h->elf))
15092 htab->maybe_local_ifunc_resolver = 1;
15093 }
15094 if (sreloc == NULL)
15095 abort ();
15096
15097 if (sreloc->reloc_count * sizeof (Elf64_External_Rela)
15098 >= sreloc->size)
15099 abort ();
15100 loc = sreloc->contents;
15101 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
15102 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
15103
15104 /* If this reloc is against an external symbol, it will
15105 be computed at runtime, so there's no need to do
15106 anything now. However, for the sake of prelink ensure
15107 that the section contents are a known value. */
15108 if (! relocate)
15109 {
15110 unresolved_reloc = FALSE;
15111 /* The value chosen here is quite arbitrary as ld.so
15112 ignores section contents except for the special
15113 case of .opd where the contents might be accessed
15114 before relocation. Choose zero, as that won't
15115 cause reloc overflow. */
15116 relocation = 0;
15117 addend = 0;
15118 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
15119 to improve backward compatibility with older
15120 versions of ld. */
15121 if (r_type == R_PPC64_ADDR64)
15122 addend = outrel.r_addend;
15123 /* Adjust pc_relative relocs to have zero in *r_offset. */
15124 else if (ppc64_elf_howto_table[r_type]->pc_relative)
15125 addend = outrel.r_offset;
15126 }
15127 }
15128 break;
15129
15130 case R_PPC64_COPY:
15131 case R_PPC64_GLOB_DAT:
15132 case R_PPC64_JMP_SLOT:
15133 case R_PPC64_JMP_IREL:
15134 case R_PPC64_RELATIVE:
15135 /* We shouldn't ever see these dynamic relocs in relocatable
15136 files. */
15137 /* Fall through. */
15138
15139 case R_PPC64_PLTGOT16:
15140 case R_PPC64_PLTGOT16_DS:
15141 case R_PPC64_PLTGOT16_HA:
15142 case R_PPC64_PLTGOT16_HI:
15143 case R_PPC64_PLTGOT16_LO:
15144 case R_PPC64_PLTGOT16_LO_DS:
15145 case R_PPC64_PLTREL32:
15146 case R_PPC64_PLTREL64:
15147 /* These ones haven't been implemented yet. */
15148
15149 info->callbacks->einfo
15150 /* xgettext:c-format */
15151 (_("%P: %B: %s is not supported for `%T'\n"),
15152 input_bfd,
15153 ppc64_elf_howto_table[r_type]->name, sym_name);
15154
15155 bfd_set_error (bfd_error_invalid_operation);
15156 ret = FALSE;
15157 goto copy_reloc;
15158 }
15159
15160 /* Multi-instruction sequences that access the TOC can be
15161 optimized, eg. addis ra,r2,0; addi rb,ra,x;
15162 to nop; addi rb,r2,x; */
15163 switch (r_type)
15164 {
15165 default:
15166 break;
15167
15168 case R_PPC64_GOT_TLSLD16_HI:
15169 case R_PPC64_GOT_TLSGD16_HI:
15170 case R_PPC64_GOT_TPREL16_HI:
15171 case R_PPC64_GOT_DTPREL16_HI:
15172 case R_PPC64_GOT16_HI:
15173 case R_PPC64_TOC16_HI:
15174 /* These relocs would only be useful if building up an
15175 offset to later add to r2, perhaps in an indexed
15176 addressing mode instruction. Don't try to optimize.
15177 Unfortunately, the possibility of someone building up an
15178 offset like this or even with the HA relocs, means that
15179 we need to check the high insn when optimizing the low
15180 insn. */
15181 break;
15182
15183 case R_PPC64_GOT_TLSLD16_HA:
15184 case R_PPC64_GOT_TLSGD16_HA:
15185 case R_PPC64_GOT_TPREL16_HA:
15186 case R_PPC64_GOT_DTPREL16_HA:
15187 case R_PPC64_GOT16_HA:
15188 case R_PPC64_TOC16_HA:
15189 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
15190 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
15191 {
15192 bfd_byte *p = contents + (rel->r_offset & ~3);
15193 bfd_put_32 (input_bfd, NOP, p);
15194 }
15195 break;
15196
15197 case R_PPC64_GOT_TLSLD16_LO:
15198 case R_PPC64_GOT_TLSGD16_LO:
15199 case R_PPC64_GOT_TPREL16_LO_DS:
15200 case R_PPC64_GOT_DTPREL16_LO_DS:
15201 case R_PPC64_GOT16_LO:
15202 case R_PPC64_GOT16_LO_DS:
15203 case R_PPC64_TOC16_LO:
15204 case R_PPC64_TOC16_LO_DS:
15205 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
15206 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
15207 {
15208 bfd_byte *p = contents + (rel->r_offset & ~3);
15209 insn = bfd_get_32 (input_bfd, p);
15210 if ((insn & (0x3f << 26)) == 12u << 26 /* addic */)
15211 {
15212 /* Transform addic to addi when we change reg. */
15213 insn &= ~((0x3f << 26) | (0x1f << 16));
15214 insn |= (14u << 26) | (2 << 16);
15215 }
15216 else
15217 {
15218 insn &= ~(0x1f << 16);
15219 insn |= 2 << 16;
15220 }
15221 bfd_put_32 (input_bfd, insn, p);
15222 }
15223 break;
15224 }
15225
15226 /* Do any further special processing. */
15227 howto = ppc64_elf_howto_table[(int) r_type];
15228 switch (r_type)
15229 {
15230 default:
15231 break;
15232
15233 case R_PPC64_REL16_HA:
15234 case R_PPC64_REL16DX_HA:
15235 case R_PPC64_ADDR16_HA:
15236 case R_PPC64_ADDR16_HIGHA:
15237 case R_PPC64_ADDR16_HIGHERA:
15238 case R_PPC64_ADDR16_HIGHESTA:
15239 case R_PPC64_TOC16_HA:
15240 case R_PPC64_SECTOFF_HA:
15241 case R_PPC64_TPREL16_HA:
15242 case R_PPC64_TPREL16_HIGHA:
15243 case R_PPC64_TPREL16_HIGHERA:
15244 case R_PPC64_TPREL16_HIGHESTA:
15245 case R_PPC64_DTPREL16_HA:
15246 case R_PPC64_DTPREL16_HIGHA:
15247 case R_PPC64_DTPREL16_HIGHERA:
15248 case R_PPC64_DTPREL16_HIGHESTA:
15249 /* It's just possible that this symbol is a weak symbol
15250 that's not actually defined anywhere. In that case,
15251 'sec' would be NULL, and we should leave the symbol
15252 alone (it will be set to zero elsewhere in the link). */
15253 if (sec == NULL)
15254 break;
15255 /* Fall through. */
15256
15257 case R_PPC64_GOT16_HA:
15258 case R_PPC64_PLTGOT16_HA:
15259 case R_PPC64_PLT16_HA:
15260 case R_PPC64_GOT_TLSGD16_HA:
15261 case R_PPC64_GOT_TLSLD16_HA:
15262 case R_PPC64_GOT_TPREL16_HA:
15263 case R_PPC64_GOT_DTPREL16_HA:
15264 /* Add 0x10000 if sign bit in 0:15 is set.
15265 Bits 0:15 are not used. */
15266 addend += 0x8000;
15267 break;
15268
15269 case R_PPC64_ADDR16_DS:
15270 case R_PPC64_ADDR16_LO_DS:
15271 case R_PPC64_GOT16_DS:
15272 case R_PPC64_GOT16_LO_DS:
15273 case R_PPC64_PLT16_LO_DS:
15274 case R_PPC64_SECTOFF_DS:
15275 case R_PPC64_SECTOFF_LO_DS:
15276 case R_PPC64_TOC16_DS:
15277 case R_PPC64_TOC16_LO_DS:
15278 case R_PPC64_PLTGOT16_DS:
15279 case R_PPC64_PLTGOT16_LO_DS:
15280 case R_PPC64_GOT_TPREL16_DS:
15281 case R_PPC64_GOT_TPREL16_LO_DS:
15282 case R_PPC64_GOT_DTPREL16_DS:
15283 case R_PPC64_GOT_DTPREL16_LO_DS:
15284 case R_PPC64_TPREL16_DS:
15285 case R_PPC64_TPREL16_LO_DS:
15286 case R_PPC64_DTPREL16_DS:
15287 case R_PPC64_DTPREL16_LO_DS:
15288 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
15289 mask = 3;
15290 /* If this reloc is against an lq, lxv, or stxv insn, then
15291 the value must be a multiple of 16. This is somewhat of
15292 a hack, but the "correct" way to do this by defining _DQ
15293 forms of all the _DS relocs bloats all reloc switches in
15294 this file. It doesn't make much sense to use these
15295 relocs in data, so testing the insn should be safe. */
15296 if ((insn & (0x3f << 26)) == (56u << 26)
15297 || ((insn & (0x3f << 26)) == (61u << 26) && (insn & 3) == 1))
15298 mask = 15;
15299 relocation += addend;
15300 addend = insn & (mask ^ 3);
15301 if ((relocation & mask) != 0)
15302 {
15303 relocation ^= relocation & mask;
15304 info->callbacks->einfo
15305 /* xgettext:c-format */
15306 (_("%H: error: %s not a multiple of %u\n"),
15307 input_bfd, input_section, rel->r_offset,
15308 howto->name,
15309 mask + 1);
15310 bfd_set_error (bfd_error_bad_value);
15311 ret = FALSE;
15312 goto copy_reloc;
15313 }
15314 break;
15315 }
15316
15317 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
15318 because such sections are not SEC_ALLOC and thus ld.so will
15319 not process them. */
15320 if (unresolved_reloc
15321 && !((input_section->flags & SEC_DEBUGGING) != 0
15322 && h->elf.def_dynamic)
15323 && _bfd_elf_section_offset (output_bfd, info, input_section,
15324 rel->r_offset) != (bfd_vma) -1)
15325 {
15326 info->callbacks->einfo
15327 /* xgettext:c-format */
15328 (_("%H: unresolvable %s against `%T'\n"),
15329 input_bfd, input_section, rel->r_offset,
15330 howto->name,
15331 h->elf.root.root.string);
15332 ret = FALSE;
15333 }
15334
15335 /* 16-bit fields in insns mostly have signed values, but a
15336 few insns have 16-bit unsigned values. Really, we should
15337 have different reloc types. */
15338 if (howto->complain_on_overflow != complain_overflow_dont
15339 && howto->dst_mask == 0xffff
15340 && (input_section->flags & SEC_CODE) != 0)
15341 {
15342 enum complain_overflow complain = complain_overflow_signed;
15343
15344 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
15345 if ((insn & (0x3f << 26)) == 10u << 26 /* cmpli */)
15346 complain = complain_overflow_bitfield;
15347 else if (howto->rightshift == 0
15348 ? ((insn & (0x3f << 26)) == 28u << 26 /* andi */
15349 || (insn & (0x3f << 26)) == 24u << 26 /* ori */
15350 || (insn & (0x3f << 26)) == 26u << 26 /* xori */)
15351 : ((insn & (0x3f << 26)) == 29u << 26 /* andis */
15352 || (insn & (0x3f << 26)) == 25u << 26 /* oris */
15353 || (insn & (0x3f << 26)) == 27u << 26 /* xoris */))
15354 complain = complain_overflow_unsigned;
15355 if (howto->complain_on_overflow != complain)
15356 {
15357 alt_howto = *howto;
15358 alt_howto.complain_on_overflow = complain;
15359 howto = &alt_howto;
15360 }
15361 }
15362
15363 if (r_type == R_PPC64_REL16DX_HA)
15364 {
15365 /* Split field reloc isn't handled by _bfd_final_link_relocate. */
15366 if (rel->r_offset + 4 > input_section->size)
15367 r = bfd_reloc_outofrange;
15368 else
15369 {
15370 relocation += addend;
15371 relocation -= (rel->r_offset
15372 + input_section->output_offset
15373 + input_section->output_section->vma);
15374 relocation = (bfd_signed_vma) relocation >> 16;
15375 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
15376 insn &= ~0x1fffc1;
15377 insn |= (relocation & 0xffc1) | ((relocation & 0x3e) << 15);
15378 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
15379 r = bfd_reloc_ok;
15380 if (relocation + 0x8000 > 0xffff)
15381 r = bfd_reloc_overflow;
15382 }
15383 }
15384 else
15385 r = _bfd_final_link_relocate (howto, input_bfd, input_section, contents,
15386 rel->r_offset, relocation, addend);
15387
15388 if (r != bfd_reloc_ok)
15389 {
15390 char *more_info = NULL;
15391 const char *reloc_name = howto->name;
15392
15393 if (reloc_dest != DEST_NORMAL)
15394 {
15395 more_info = bfd_malloc (strlen (reloc_name) + 8);
15396 if (more_info != NULL)
15397 {
15398 strcpy (more_info, reloc_name);
15399 strcat (more_info, (reloc_dest == DEST_OPD
15400 ? " (OPD)" : " (stub)"));
15401 reloc_name = more_info;
15402 }
15403 }
15404
15405 if (r == bfd_reloc_overflow)
15406 {
15407 /* On code like "if (foo) foo();" don't report overflow
15408 on a branch to zero when foo is undefined. */
15409 if (!warned
15410 && (reloc_dest == DEST_STUB
15411 || !(h != NULL
15412 && (h->elf.root.type == bfd_link_hash_undefweak
15413 || h->elf.root.type == bfd_link_hash_undefined)
15414 && is_branch_reloc (r_type))))
15415 info->callbacks->reloc_overflow (info, &h->elf.root,
15416 sym_name, reloc_name,
15417 orig_rel.r_addend,
15418 input_bfd, input_section,
15419 rel->r_offset);
15420 }
15421 else
15422 {
15423 info->callbacks->einfo
15424 /* xgettext:c-format */
15425 (_("%H: %s against `%T': error %d\n"),
15426 input_bfd, input_section, rel->r_offset,
15427 reloc_name, sym_name, (int) r);
15428 ret = FALSE;
15429 }
15430 if (more_info != NULL)
15431 free (more_info);
15432 }
15433 copy_reloc:
15434 if (wrel != rel)
15435 *wrel = *rel;
15436 }
15437
15438 if (wrel != rel)
15439 {
15440 Elf_Internal_Shdr *rel_hdr;
15441 size_t deleted = rel - wrel;
15442
15443 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
15444 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
15445 if (rel_hdr->sh_size == 0)
15446 {
15447 /* It is too late to remove an empty reloc section. Leave
15448 one NONE reloc.
15449 ??? What is wrong with an empty section??? */
15450 rel_hdr->sh_size = rel_hdr->sh_entsize;
15451 deleted -= 1;
15452 }
15453 rel_hdr = _bfd_elf_single_rel_hdr (input_section);
15454 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
15455 input_section->reloc_count -= deleted;
15456 }
15457
15458 /* If we're emitting relocations, then shortly after this function
15459 returns, reloc offsets and addends for this section will be
15460 adjusted. Worse, reloc symbol indices will be for the output
15461 file rather than the input. Save a copy of the relocs for
15462 opd_entry_value. */
15463 if (is_opd && (info->emitrelocations || bfd_link_relocatable (info)))
15464 {
15465 bfd_size_type amt;
15466 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
15467 rel = bfd_alloc (input_bfd, amt);
15468 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd.relocs == NULL);
15469 ppc64_elf_tdata (input_bfd)->opd.relocs = rel;
15470 if (rel == NULL)
15471 return FALSE;
15472 memcpy (rel, relocs, amt);
15473 }
15474 return ret;
15475 }
15476
15477 /* Adjust the value of any local symbols in opd sections. */
15478
15479 static int
15480 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
15481 const char *name ATTRIBUTE_UNUSED,
15482 Elf_Internal_Sym *elfsym,
15483 asection *input_sec,
15484 struct elf_link_hash_entry *h)
15485 {
15486 struct _opd_sec_data *opd;
15487 long adjust;
15488 bfd_vma value;
15489
15490 if (h != NULL)
15491 return 1;
15492
15493 opd = get_opd_info (input_sec);
15494 if (opd == NULL || opd->adjust == NULL)
15495 return 1;
15496
15497 value = elfsym->st_value - input_sec->output_offset;
15498 if (!bfd_link_relocatable (info))
15499 value -= input_sec->output_section->vma;
15500
15501 adjust = opd->adjust[OPD_NDX (value)];
15502 if (adjust == -1)
15503 return 2;
15504
15505 elfsym->st_value += adjust;
15506 return 1;
15507 }
15508
15509 /* Finish up dynamic symbol handling. We set the contents of various
15510 dynamic sections here. */
15511
15512 static bfd_boolean
15513 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
15514 struct bfd_link_info *info,
15515 struct elf_link_hash_entry *h,
15516 Elf_Internal_Sym *sym)
15517 {
15518 struct ppc_link_hash_table *htab;
15519 struct plt_entry *ent;
15520 Elf_Internal_Rela rela;
15521 bfd_byte *loc;
15522
15523 htab = ppc_hash_table (info);
15524 if (htab == NULL)
15525 return FALSE;
15526
15527 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
15528 if (ent->plt.offset != (bfd_vma) -1)
15529 {
15530 /* This symbol has an entry in the procedure linkage
15531 table. Set it up. */
15532 if (!htab->elf.dynamic_sections_created
15533 || h->dynindx == -1)
15534 {
15535 BFD_ASSERT (h->type == STT_GNU_IFUNC
15536 && h->def_regular
15537 && (h->root.type == bfd_link_hash_defined
15538 || h->root.type == bfd_link_hash_defweak));
15539 rela.r_offset = (htab->elf.iplt->output_section->vma
15540 + htab->elf.iplt->output_offset
15541 + ent->plt.offset);
15542 if (htab->opd_abi)
15543 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
15544 else
15545 rela.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
15546 rela.r_addend = (h->root.u.def.value
15547 + h->root.u.def.section->output_offset
15548 + h->root.u.def.section->output_section->vma
15549 + ent->addend);
15550 loc = (htab->elf.irelplt->contents
15551 + (htab->elf.irelplt->reloc_count++
15552 * sizeof (Elf64_External_Rela)));
15553 htab->local_ifunc_resolver = 1;
15554 }
15555 else
15556 {
15557 rela.r_offset = (htab->elf.splt->output_section->vma
15558 + htab->elf.splt->output_offset
15559 + ent->plt.offset);
15560 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
15561 rela.r_addend = ent->addend;
15562 loc = (htab->elf.srelplt->contents
15563 + ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE (htab))
15564 / PLT_ENTRY_SIZE (htab) * sizeof (Elf64_External_Rela)));
15565 if (h->type == STT_GNU_IFUNC && is_static_defined (h))
15566 htab->maybe_local_ifunc_resolver = 1;
15567 }
15568 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
15569
15570 if (!htab->opd_abi)
15571 {
15572 if (!h->def_regular)
15573 {
15574 /* Mark the symbol as undefined, rather than as
15575 defined in glink. Leave the value if there were
15576 any relocations where pointer equality matters
15577 (this is a clue for the dynamic linker, to make
15578 function pointer comparisons work between an
15579 application and shared library), otherwise set it
15580 to zero. */
15581 sym->st_shndx = SHN_UNDEF;
15582 if (!h->pointer_equality_needed)
15583 sym->st_value = 0;
15584 else if (!h->ref_regular_nonweak)
15585 {
15586 /* This breaks function pointer comparisons, but
15587 that is better than breaking tests for a NULL
15588 function pointer. */
15589 sym->st_value = 0;
15590 }
15591 }
15592 }
15593 }
15594
15595 if (h->needs_copy)
15596 {
15597 /* This symbol needs a copy reloc. Set it up. */
15598 asection *srel;
15599
15600 if (h->dynindx == -1
15601 || (h->root.type != bfd_link_hash_defined
15602 && h->root.type != bfd_link_hash_defweak)
15603 || htab->elf.srelbss == NULL
15604 || htab->elf.sreldynrelro == NULL)
15605 abort ();
15606
15607 rela.r_offset = (h->root.u.def.value
15608 + h->root.u.def.section->output_section->vma
15609 + h->root.u.def.section->output_offset);
15610 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
15611 rela.r_addend = 0;
15612 if (h->root.u.def.section == htab->elf.sdynrelro)
15613 srel = htab->elf.sreldynrelro;
15614 else
15615 srel = htab->elf.srelbss;
15616 loc = srel->contents;
15617 loc += srel->reloc_count++ * sizeof (Elf64_External_Rela);
15618 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
15619 }
15620
15621 return TRUE;
15622 }
15623
15624 /* Used to decide how to sort relocs in an optimal manner for the
15625 dynamic linker, before writing them out. */
15626
15627 static enum elf_reloc_type_class
15628 ppc64_elf_reloc_type_class (const struct bfd_link_info *info,
15629 const asection *rel_sec,
15630 const Elf_Internal_Rela *rela)
15631 {
15632 enum elf_ppc64_reloc_type r_type;
15633 struct ppc_link_hash_table *htab = ppc_hash_table (info);
15634
15635 if (rel_sec == htab->elf.irelplt)
15636 return reloc_class_ifunc;
15637
15638 r_type = ELF64_R_TYPE (rela->r_info);
15639 switch (r_type)
15640 {
15641 case R_PPC64_RELATIVE:
15642 return reloc_class_relative;
15643 case R_PPC64_JMP_SLOT:
15644 return reloc_class_plt;
15645 case R_PPC64_COPY:
15646 return reloc_class_copy;
15647 default:
15648 return reloc_class_normal;
15649 }
15650 }
15651
15652 /* Finish up the dynamic sections. */
15653
15654 static bfd_boolean
15655 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
15656 struct bfd_link_info *info)
15657 {
15658 struct ppc_link_hash_table *htab;
15659 bfd *dynobj;
15660 asection *sdyn;
15661
15662 htab = ppc_hash_table (info);
15663 if (htab == NULL)
15664 return FALSE;
15665
15666 dynobj = htab->elf.dynobj;
15667 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
15668
15669 if (htab->elf.dynamic_sections_created)
15670 {
15671 Elf64_External_Dyn *dyncon, *dynconend;
15672
15673 if (sdyn == NULL || htab->elf.sgot == NULL)
15674 abort ();
15675
15676 dyncon = (Elf64_External_Dyn *) sdyn->contents;
15677 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
15678 for (; dyncon < dynconend; dyncon++)
15679 {
15680 Elf_Internal_Dyn dyn;
15681 asection *s;
15682
15683 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
15684
15685 switch (dyn.d_tag)
15686 {
15687 default:
15688 continue;
15689
15690 case DT_PPC64_GLINK:
15691 s = htab->glink;
15692 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15693 /* We stupidly defined DT_PPC64_GLINK to be the start
15694 of glink rather than the first entry point, which is
15695 what ld.so needs, and now have a bigger stub to
15696 support automatic multiple TOCs. */
15697 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 8 * 4;
15698 break;
15699
15700 case DT_PPC64_OPD:
15701 s = bfd_get_section_by_name (output_bfd, ".opd");
15702 if (s == NULL)
15703 continue;
15704 dyn.d_un.d_ptr = s->vma;
15705 break;
15706
15707 case DT_PPC64_OPT:
15708 if (htab->do_multi_toc && htab->multi_toc_needed)
15709 dyn.d_un.d_val |= PPC64_OPT_MULTI_TOC;
15710 if (htab->has_plt_localentry0)
15711 dyn.d_un.d_val |= PPC64_OPT_LOCALENTRY;
15712 break;
15713
15714 case DT_PPC64_OPDSZ:
15715 s = bfd_get_section_by_name (output_bfd, ".opd");
15716 if (s == NULL)
15717 continue;
15718 dyn.d_un.d_val = s->size;
15719 break;
15720
15721 case DT_PLTGOT:
15722 s = htab->elf.splt;
15723 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15724 break;
15725
15726 case DT_JMPREL:
15727 s = htab->elf.srelplt;
15728 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15729 break;
15730
15731 case DT_PLTRELSZ:
15732 dyn.d_un.d_val = htab->elf.srelplt->size;
15733 break;
15734
15735 case DT_TEXTREL:
15736 if (htab->local_ifunc_resolver)
15737 info->callbacks->einfo
15738 (_("%X%P: text relocations and GNU indirect "
15739 "functions will result in a segfault at runtime\n"));
15740 else if (htab->maybe_local_ifunc_resolver)
15741 info->callbacks->einfo
15742 (_("%P: warning: text relocations and GNU indirect "
15743 "functions may result in a segfault at runtime\n"));
15744 continue;
15745 }
15746
15747 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
15748 }
15749 }
15750
15751 if (htab->elf.sgot != NULL && htab->elf.sgot->size != 0
15752 && htab->elf.sgot->output_section != bfd_abs_section_ptr)
15753 {
15754 /* Fill in the first entry in the global offset table.
15755 We use it to hold the link-time TOCbase. */
15756 bfd_put_64 (output_bfd,
15757 elf_gp (output_bfd) + TOC_BASE_OFF,
15758 htab->elf.sgot->contents);
15759
15760 /* Set .got entry size. */
15761 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 8;
15762 }
15763
15764 if (htab->elf.splt != NULL && htab->elf.splt->size != 0
15765 && htab->elf.splt->output_section != bfd_abs_section_ptr)
15766 {
15767 /* Set .plt entry size. */
15768 elf_section_data (htab->elf.splt->output_section)->this_hdr.sh_entsize
15769 = PLT_ENTRY_SIZE (htab);
15770 }
15771
15772 /* brlt is SEC_LINKER_CREATED, so we need to write out relocs for
15773 brlt ourselves if emitrelocations. */
15774 if (htab->brlt != NULL
15775 && htab->brlt->reloc_count != 0
15776 && !_bfd_elf_link_output_relocs (output_bfd,
15777 htab->brlt,
15778 elf_section_data (htab->brlt)->rela.hdr,
15779 elf_section_data (htab->brlt)->relocs,
15780 NULL))
15781 return FALSE;
15782
15783 if (htab->glink != NULL
15784 && htab->glink->reloc_count != 0
15785 && !_bfd_elf_link_output_relocs (output_bfd,
15786 htab->glink,
15787 elf_section_data (htab->glink)->rela.hdr,
15788 elf_section_data (htab->glink)->relocs,
15789 NULL))
15790 return FALSE;
15791
15792 if (htab->glink_eh_frame != NULL
15793 && htab->glink_eh_frame->size != 0)
15794 {
15795 bfd_vma val;
15796 bfd_byte *p;
15797 struct map_stub *group;
15798 size_t align = 4;
15799
15800 p = htab->glink_eh_frame->contents;
15801 p += (sizeof (glink_eh_frame_cie) + align - 1) & -align;
15802
15803 for (group = htab->group; group != NULL; group = group->next)
15804 if (group->stub_sec != NULL)
15805 {
15806 /* Offset to stub section. */
15807 val = (group->stub_sec->output_section->vma
15808 + group->stub_sec->output_offset);
15809 val -= (htab->glink_eh_frame->output_section->vma
15810 + htab->glink_eh_frame->output_offset
15811 + (p + 8 - htab->glink_eh_frame->contents));
15812 if (val + 0x80000000 > 0xffffffff)
15813 {
15814 info->callbacks->einfo
15815 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
15816 group->stub_sec->name);
15817 return FALSE;
15818 }
15819 bfd_put_32 (dynobj, val, p + 8);
15820 p += stub_eh_frame_size (group, align);
15821 }
15822 if (htab->glink != NULL && htab->glink->size != 0)
15823 {
15824 /* Offset to .glink. */
15825 val = (htab->glink->output_section->vma
15826 + htab->glink->output_offset
15827 + 8);
15828 val -= (htab->glink_eh_frame->output_section->vma
15829 + htab->glink_eh_frame->output_offset
15830 + (p + 8 - htab->glink_eh_frame->contents));
15831 if (val + 0x80000000 > 0xffffffff)
15832 {
15833 info->callbacks->einfo
15834 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
15835 htab->glink->name);
15836 return FALSE;
15837 }
15838 bfd_put_32 (dynobj, val, p + 8);
15839 p += (24 + align - 1) & -align;
15840 }
15841
15842 if (htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME
15843 && !_bfd_elf_write_section_eh_frame (output_bfd, info,
15844 htab->glink_eh_frame,
15845 htab->glink_eh_frame->contents))
15846 return FALSE;
15847 }
15848
15849 /* We need to handle writing out multiple GOT sections ourselves,
15850 since we didn't add them to DYNOBJ. We know dynobj is the first
15851 bfd. */
15852 while ((dynobj = dynobj->link.next) != NULL)
15853 {
15854 asection *s;
15855
15856 if (!is_ppc64_elf (dynobj))
15857 continue;
15858
15859 s = ppc64_elf_tdata (dynobj)->got;
15860 if (s != NULL
15861 && s->size != 0
15862 && s->output_section != bfd_abs_section_ptr
15863 && !bfd_set_section_contents (output_bfd, s->output_section,
15864 s->contents, s->output_offset,
15865 s->size))
15866 return FALSE;
15867 s = ppc64_elf_tdata (dynobj)->relgot;
15868 if (s != NULL
15869 && s->size != 0
15870 && s->output_section != bfd_abs_section_ptr
15871 && !bfd_set_section_contents (output_bfd, s->output_section,
15872 s->contents, s->output_offset,
15873 s->size))
15874 return FALSE;
15875 }
15876
15877 return TRUE;
15878 }
15879
15880 #include "elf64-target.h"
15881
15882 /* FreeBSD support */
15883
15884 #undef TARGET_LITTLE_SYM
15885 #undef TARGET_LITTLE_NAME
15886
15887 #undef TARGET_BIG_SYM
15888 #define TARGET_BIG_SYM powerpc_elf64_fbsd_vec
15889 #undef TARGET_BIG_NAME
15890 #define TARGET_BIG_NAME "elf64-powerpc-freebsd"
15891
15892 #undef ELF_OSABI
15893 #define ELF_OSABI ELFOSABI_FREEBSD
15894
15895 #undef elf64_bed
15896 #define elf64_bed elf64_powerpc_fbsd_bed
15897
15898 #include "elf64-target.h"