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bfd: don't produce corrupt COFF symbol table due to long ELF file name symbols
[deliverable/binutils-gdb.git] / bfd / elf64-ppc.c
1 /* PowerPC64-specific support for 64-bit ELF.
2 Copyright (C) 1999-2015 Free Software Foundation, Inc.
3 Written by Linus Nordberg, Swox AB <info@swox.com>,
4 based on elf32-ppc.c by Ian Lance Taylor.
5 Largely rewritten by Alan Modra.
6
7 This file is part of BFD, the Binary File Descriptor library.
8
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
13
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
18
19 You should have received a copy of the GNU General Public License along
20 with this program; if not, write to the Free Software Foundation, Inc.,
21 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
22
23
24 /* The 64-bit PowerPC ELF ABI may be found at
25 http://www.linuxbase.org/spec/ELF/ppc64/PPC-elf64abi.txt, and
26 http://www.linuxbase.org/spec/ELF/ppc64/spec/book1.html */
27
28 #include "sysdep.h"
29 #include <stdarg.h>
30 #include "bfd.h"
31 #include "bfdlink.h"
32 #include "libbfd.h"
33 #include "elf-bfd.h"
34 #include "elf/ppc64.h"
35 #include "elf64-ppc.h"
36 #include "dwarf2.h"
37
38 static bfd_reloc_status_type ppc64_elf_ha_reloc
39 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
40 static bfd_reloc_status_type ppc64_elf_branch_reloc
41 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
42 static bfd_reloc_status_type ppc64_elf_brtaken_reloc
43 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
44 static bfd_reloc_status_type ppc64_elf_sectoff_reloc
45 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
46 static bfd_reloc_status_type ppc64_elf_sectoff_ha_reloc
47 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
48 static bfd_reloc_status_type ppc64_elf_toc_reloc
49 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
50 static bfd_reloc_status_type ppc64_elf_toc_ha_reloc
51 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
52 static bfd_reloc_status_type ppc64_elf_toc64_reloc
53 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
54 static bfd_reloc_status_type ppc64_elf_unhandled_reloc
55 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
56 static bfd_vma opd_entry_value
57 (asection *, bfd_vma, asection **, bfd_vma *, bfd_boolean);
58
59 #define TARGET_LITTLE_SYM powerpc_elf64_le_vec
60 #define TARGET_LITTLE_NAME "elf64-powerpcle"
61 #define TARGET_BIG_SYM powerpc_elf64_vec
62 #define TARGET_BIG_NAME "elf64-powerpc"
63 #define ELF_ARCH bfd_arch_powerpc
64 #define ELF_TARGET_ID PPC64_ELF_DATA
65 #define ELF_MACHINE_CODE EM_PPC64
66 #define ELF_MAXPAGESIZE 0x10000
67 #define ELF_COMMONPAGESIZE 0x10000
68 #define elf_info_to_howto ppc64_elf_info_to_howto
69
70 #define elf_backend_want_got_sym 0
71 #define elf_backend_want_plt_sym 0
72 #define elf_backend_plt_alignment 3
73 #define elf_backend_plt_not_loaded 1
74 #define elf_backend_got_header_size 8
75 #define elf_backend_can_gc_sections 1
76 #define elf_backend_can_refcount 1
77 #define elf_backend_rela_normal 1
78 #define elf_backend_default_execstack 0
79
80 #define bfd_elf64_mkobject ppc64_elf_mkobject
81 #define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup
82 #define bfd_elf64_bfd_reloc_name_lookup ppc64_elf_reloc_name_lookup
83 #define bfd_elf64_bfd_merge_private_bfd_data ppc64_elf_merge_private_bfd_data
84 #define bfd_elf64_bfd_print_private_bfd_data ppc64_elf_print_private_bfd_data
85 #define bfd_elf64_new_section_hook ppc64_elf_new_section_hook
86 #define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create
87 #define bfd_elf64_get_synthetic_symtab ppc64_elf_get_synthetic_symtab
88 #define bfd_elf64_bfd_link_just_syms ppc64_elf_link_just_syms
89
90 #define elf_backend_object_p ppc64_elf_object_p
91 #define elf_backend_grok_prstatus ppc64_elf_grok_prstatus
92 #define elf_backend_grok_psinfo ppc64_elf_grok_psinfo
93 #define elf_backend_write_core_note ppc64_elf_write_core_note
94 #define elf_backend_create_dynamic_sections ppc64_elf_create_dynamic_sections
95 #define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol
96 #define elf_backend_add_symbol_hook ppc64_elf_add_symbol_hook
97 #define elf_backend_check_directives ppc64_elf_before_check_relocs
98 #define elf_backend_notice_as_needed ppc64_elf_notice_as_needed
99 #define elf_backend_archive_symbol_lookup ppc64_elf_archive_symbol_lookup
100 #define elf_backend_check_relocs ppc64_elf_check_relocs
101 #define elf_backend_gc_keep ppc64_elf_gc_keep
102 #define elf_backend_gc_mark_dynamic_ref ppc64_elf_gc_mark_dynamic_ref
103 #define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook
104 #define elf_backend_gc_sweep_hook ppc64_elf_gc_sweep_hook
105 #define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol
106 #define elf_backend_hide_symbol ppc64_elf_hide_symbol
107 #define elf_backend_maybe_function_sym ppc64_elf_maybe_function_sym
108 #define elf_backend_always_size_sections ppc64_elf_func_desc_adjust
109 #define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections
110 #define elf_backend_hash_symbol ppc64_elf_hash_symbol
111 #define elf_backend_init_index_section _bfd_elf_init_2_index_sections
112 #define elf_backend_action_discarded ppc64_elf_action_discarded
113 #define elf_backend_relocate_section ppc64_elf_relocate_section
114 #define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol
115 #define elf_backend_reloc_type_class ppc64_elf_reloc_type_class
116 #define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections
117 #define elf_backend_link_output_symbol_hook ppc64_elf_output_symbol_hook
118 #define elf_backend_special_sections ppc64_elf_special_sections
119 #define elf_backend_merge_symbol_attribute ppc64_elf_merge_symbol_attribute
120
121 /* The name of the dynamic interpreter. This is put in the .interp
122 section. */
123 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
124
125 /* The size in bytes of an entry in the procedure linkage table. */
126 #define PLT_ENTRY_SIZE(htab) (htab->opd_abi ? 24 : 8)
127
128 /* The initial size of the plt reserved for the dynamic linker. */
129 #define PLT_INITIAL_ENTRY_SIZE(htab) (htab->opd_abi ? 24 : 16)
130
131 /* Offsets to some stack save slots. */
132 #define STK_LR 16
133 #define STK_TOC(htab) (htab->opd_abi ? 40 : 24)
134 /* This one is dodgy. ELFv2 does not have a linker word, so use the
135 CR save slot. Used only by optimised __tls_get_addr call stub,
136 relying on __tls_get_addr_opt not saving CR.. */
137 #define STK_LINKER(htab) (htab->opd_abi ? 32 : 8)
138
139 /* TOC base pointers offset from start of TOC. */
140 #define TOC_BASE_OFF 0x8000
141 /* TOC base alignment. */
142 #define TOC_BASE_ALIGN 256
143
144 /* Offset of tp and dtp pointers from start of TLS block. */
145 #define TP_OFFSET 0x7000
146 #define DTP_OFFSET 0x8000
147
148 /* .plt call stub instructions. The normal stub is like this, but
149 sometimes the .plt entry crosses a 64k boundary and we need to
150 insert an addi to adjust r11. */
151 #define STD_R2_0R1 0xf8410000 /* std %r2,0+40(%r1) */
152 #define ADDIS_R11_R2 0x3d620000 /* addis %r11,%r2,xxx@ha */
153 #define LD_R12_0R11 0xe98b0000 /* ld %r12,xxx+0@l(%r11) */
154 #define MTCTR_R12 0x7d8903a6 /* mtctr %r12 */
155 #define LD_R2_0R11 0xe84b0000 /* ld %r2,xxx+8@l(%r11) */
156 #define LD_R11_0R11 0xe96b0000 /* ld %r11,xxx+16@l(%r11) */
157 #define BCTR 0x4e800420 /* bctr */
158
159 #define ADDI_R11_R11 0x396b0000 /* addi %r11,%r11,off@l */
160 #define ADDIS_R2_R2 0x3c420000 /* addis %r2,%r2,off@ha */
161 #define ADDI_R2_R2 0x38420000 /* addi %r2,%r2,off@l */
162
163 #define XOR_R2_R12_R12 0x7d826278 /* xor %r2,%r12,%r12 */
164 #define ADD_R11_R11_R2 0x7d6b1214 /* add %r11,%r11,%r2 */
165 #define XOR_R11_R12_R12 0x7d8b6278 /* xor %r11,%r12,%r12 */
166 #define ADD_R2_R2_R11 0x7c425a14 /* add %r2,%r2,%r11 */
167 #define CMPLDI_R2_0 0x28220000 /* cmpldi %r2,0 */
168 #define BNECTR 0x4ca20420 /* bnectr+ */
169 #define BNECTR_P4 0x4ce20420 /* bnectr+ */
170
171 #define LD_R12_0R2 0xe9820000 /* ld %r12,xxx+0(%r2) */
172 #define LD_R11_0R2 0xe9620000 /* ld %r11,xxx+0(%r2) */
173 #define LD_R2_0R2 0xe8420000 /* ld %r2,xxx+0(%r2) */
174
175 #define LD_R2_0R1 0xe8410000 /* ld %r2,0(%r1) */
176 #define LD_R2_0R12 0xe84c0000 /* ld %r2,0(%r12) */
177 #define ADD_R2_R2_R12 0x7c426214 /* add %r2,%r2,%r12 */
178
179 #define LIS_R2 0x3c400000 /* lis %r2,xxx@ha */
180 #define ADDIS_R2_R12 0x3c4c0000 /* addis %r2,%r12,xxx@ha */
181 #define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */
182 #define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,xxx@ha */
183 #define LD_R12_0R12 0xe98c0000 /* ld %r12,xxx@l(%r12) */
184
185 /* glink call stub instructions. We enter with the index in R0. */
186 #define GLINK_CALL_STUB_SIZE (16*4)
187 /* 0: */
188 /* .quad plt0-1f */
189 /* __glink: */
190 #define MFLR_R12 0x7d8802a6 /* mflr %12 */
191 #define BCL_20_31 0x429f0005 /* bcl 20,31,1f */
192 /* 1: */
193 #define MFLR_R11 0x7d6802a6 /* mflr %11 */
194 /* ld %2,(0b-1b)(%11) */
195 #define MTLR_R12 0x7d8803a6 /* mtlr %12 */
196 #define ADD_R11_R2_R11 0x7d625a14 /* add %11,%2,%11 */
197 /* ld %12,0(%11) */
198 /* ld %2,8(%11) */
199 /* mtctr %12 */
200 /* ld %11,16(%11) */
201 /* bctr */
202 #define MFLR_R0 0x7c0802a6 /* mflr %r0 */
203 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
204 #define SUB_R12_R12_R11 0x7d8b6050 /* subf %r12,%r11,%r12 */
205 #define ADDI_R0_R12 0x380c0000 /* addi %r0,%r12,0 */
206 #define SRDI_R0_R0_2 0x7800f082 /* rldicl %r0,%r0,62,2 */
207
208 /* Pad with this. */
209 #define NOP 0x60000000
210
211 /* Some other nops. */
212 #define CROR_151515 0x4def7b82
213 #define CROR_313131 0x4ffffb82
214
215 /* .glink entries for the first 32k functions are two instructions. */
216 #define LI_R0_0 0x38000000 /* li %r0,0 */
217 #define B_DOT 0x48000000 /* b . */
218
219 /* After that, we need two instructions to load the index, followed by
220 a branch. */
221 #define LIS_R0_0 0x3c000000 /* lis %r0,0 */
222 #define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
223
224 /* Instructions used by the save and restore reg functions. */
225 #define STD_R0_0R1 0xf8010000 /* std %r0,0(%r1) */
226 #define STD_R0_0R12 0xf80c0000 /* std %r0,0(%r12) */
227 #define LD_R0_0R1 0xe8010000 /* ld %r0,0(%r1) */
228 #define LD_R0_0R12 0xe80c0000 /* ld %r0,0(%r12) */
229 #define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
230 #define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
231 #define LI_R12_0 0x39800000 /* li %r12,0 */
232 #define STVX_VR0_R12_R0 0x7c0c01ce /* stvx %v0,%r12,%r0 */
233 #define LVX_VR0_R12_R0 0x7c0c00ce /* lvx %v0,%r12,%r0 */
234 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
235 #define BLR 0x4e800020 /* blr */
236
237 /* Since .opd is an array of descriptors and each entry will end up
238 with identical R_PPC64_RELATIVE relocs, there is really no need to
239 propagate .opd relocs; The dynamic linker should be taught to
240 relocate .opd without reloc entries. */
241 #ifndef NO_OPD_RELOCS
242 #define NO_OPD_RELOCS 0
243 #endif
244
245 #ifndef ARRAY_SIZE
246 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
247 #endif
248
249 static inline int
250 abiversion (bfd *abfd)
251 {
252 return elf_elfheader (abfd)->e_flags & EF_PPC64_ABI;
253 }
254
255 static inline void
256 set_abiversion (bfd *abfd, int ver)
257 {
258 elf_elfheader (abfd)->e_flags &= ~EF_PPC64_ABI;
259 elf_elfheader (abfd)->e_flags |= ver & EF_PPC64_ABI;
260 }
261 \f
262 #define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1)
263
264 /* Relocation HOWTO's. */
265 static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max];
266
267 static reloc_howto_type ppc64_elf_howto_raw[] = {
268 /* This reloc does nothing. */
269 HOWTO (R_PPC64_NONE, /* type */
270 0, /* rightshift */
271 3, /* size (0 = byte, 1 = short, 2 = long) */
272 0, /* bitsize */
273 FALSE, /* pc_relative */
274 0, /* bitpos */
275 complain_overflow_dont, /* complain_on_overflow */
276 bfd_elf_generic_reloc, /* special_function */
277 "R_PPC64_NONE", /* name */
278 FALSE, /* partial_inplace */
279 0, /* src_mask */
280 0, /* dst_mask */
281 FALSE), /* pcrel_offset */
282
283 /* A standard 32 bit relocation. */
284 HOWTO (R_PPC64_ADDR32, /* type */
285 0, /* rightshift */
286 2, /* size (0 = byte, 1 = short, 2 = long) */
287 32, /* bitsize */
288 FALSE, /* pc_relative */
289 0, /* bitpos */
290 complain_overflow_bitfield, /* complain_on_overflow */
291 bfd_elf_generic_reloc, /* special_function */
292 "R_PPC64_ADDR32", /* name */
293 FALSE, /* partial_inplace */
294 0, /* src_mask */
295 0xffffffff, /* dst_mask */
296 FALSE), /* pcrel_offset */
297
298 /* An absolute 26 bit branch; the lower two bits must be zero.
299 FIXME: we don't check that, we just clear them. */
300 HOWTO (R_PPC64_ADDR24, /* type */
301 0, /* rightshift */
302 2, /* size (0 = byte, 1 = short, 2 = long) */
303 26, /* bitsize */
304 FALSE, /* pc_relative */
305 0, /* bitpos */
306 complain_overflow_bitfield, /* complain_on_overflow */
307 bfd_elf_generic_reloc, /* special_function */
308 "R_PPC64_ADDR24", /* name */
309 FALSE, /* partial_inplace */
310 0, /* src_mask */
311 0x03fffffc, /* dst_mask */
312 FALSE), /* pcrel_offset */
313
314 /* A standard 16 bit relocation. */
315 HOWTO (R_PPC64_ADDR16, /* type */
316 0, /* rightshift */
317 1, /* size (0 = byte, 1 = short, 2 = long) */
318 16, /* bitsize */
319 FALSE, /* pc_relative */
320 0, /* bitpos */
321 complain_overflow_bitfield, /* complain_on_overflow */
322 bfd_elf_generic_reloc, /* special_function */
323 "R_PPC64_ADDR16", /* name */
324 FALSE, /* partial_inplace */
325 0, /* src_mask */
326 0xffff, /* dst_mask */
327 FALSE), /* pcrel_offset */
328
329 /* A 16 bit relocation without overflow. */
330 HOWTO (R_PPC64_ADDR16_LO, /* type */
331 0, /* rightshift */
332 1, /* size (0 = byte, 1 = short, 2 = long) */
333 16, /* bitsize */
334 FALSE, /* pc_relative */
335 0, /* bitpos */
336 complain_overflow_dont,/* complain_on_overflow */
337 bfd_elf_generic_reloc, /* special_function */
338 "R_PPC64_ADDR16_LO", /* name */
339 FALSE, /* partial_inplace */
340 0, /* src_mask */
341 0xffff, /* dst_mask */
342 FALSE), /* pcrel_offset */
343
344 /* Bits 16-31 of an address. */
345 HOWTO (R_PPC64_ADDR16_HI, /* type */
346 16, /* rightshift */
347 1, /* size (0 = byte, 1 = short, 2 = long) */
348 16, /* bitsize */
349 FALSE, /* pc_relative */
350 0, /* bitpos */
351 complain_overflow_signed, /* complain_on_overflow */
352 bfd_elf_generic_reloc, /* special_function */
353 "R_PPC64_ADDR16_HI", /* name */
354 FALSE, /* partial_inplace */
355 0, /* src_mask */
356 0xffff, /* dst_mask */
357 FALSE), /* pcrel_offset */
358
359 /* Bits 16-31 of an address, plus 1 if the contents of the low 16
360 bits, treated as a signed number, is negative. */
361 HOWTO (R_PPC64_ADDR16_HA, /* type */
362 16, /* rightshift */
363 1, /* size (0 = byte, 1 = short, 2 = long) */
364 16, /* bitsize */
365 FALSE, /* pc_relative */
366 0, /* bitpos */
367 complain_overflow_signed, /* complain_on_overflow */
368 ppc64_elf_ha_reloc, /* special_function */
369 "R_PPC64_ADDR16_HA", /* name */
370 FALSE, /* partial_inplace */
371 0, /* src_mask */
372 0xffff, /* dst_mask */
373 FALSE), /* pcrel_offset */
374
375 /* An absolute 16 bit branch; the lower two bits must be zero.
376 FIXME: we don't check that, we just clear them. */
377 HOWTO (R_PPC64_ADDR14, /* type */
378 0, /* rightshift */
379 2, /* size (0 = byte, 1 = short, 2 = long) */
380 16, /* bitsize */
381 FALSE, /* pc_relative */
382 0, /* bitpos */
383 complain_overflow_signed, /* complain_on_overflow */
384 ppc64_elf_branch_reloc, /* special_function */
385 "R_PPC64_ADDR14", /* name */
386 FALSE, /* partial_inplace */
387 0, /* src_mask */
388 0x0000fffc, /* dst_mask */
389 FALSE), /* pcrel_offset */
390
391 /* An absolute 16 bit branch, for which bit 10 should be set to
392 indicate that the branch is expected to be taken. The lower two
393 bits must be zero. */
394 HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */
395 0, /* rightshift */
396 2, /* size (0 = byte, 1 = short, 2 = long) */
397 16, /* bitsize */
398 FALSE, /* pc_relative */
399 0, /* bitpos */
400 complain_overflow_signed, /* complain_on_overflow */
401 ppc64_elf_brtaken_reloc, /* special_function */
402 "R_PPC64_ADDR14_BRTAKEN",/* name */
403 FALSE, /* partial_inplace */
404 0, /* src_mask */
405 0x0000fffc, /* dst_mask */
406 FALSE), /* pcrel_offset */
407
408 /* An absolute 16 bit branch, for which bit 10 should be set to
409 indicate that the branch is not expected to be taken. The lower
410 two bits must be zero. */
411 HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */
412 0, /* rightshift */
413 2, /* size (0 = byte, 1 = short, 2 = long) */
414 16, /* bitsize */
415 FALSE, /* pc_relative */
416 0, /* bitpos */
417 complain_overflow_signed, /* complain_on_overflow */
418 ppc64_elf_brtaken_reloc, /* special_function */
419 "R_PPC64_ADDR14_BRNTAKEN",/* name */
420 FALSE, /* partial_inplace */
421 0, /* src_mask */
422 0x0000fffc, /* dst_mask */
423 FALSE), /* pcrel_offset */
424
425 /* A relative 26 bit branch; the lower two bits must be zero. */
426 HOWTO (R_PPC64_REL24, /* type */
427 0, /* rightshift */
428 2, /* size (0 = byte, 1 = short, 2 = long) */
429 26, /* bitsize */
430 TRUE, /* pc_relative */
431 0, /* bitpos */
432 complain_overflow_signed, /* complain_on_overflow */
433 ppc64_elf_branch_reloc, /* special_function */
434 "R_PPC64_REL24", /* name */
435 FALSE, /* partial_inplace */
436 0, /* src_mask */
437 0x03fffffc, /* dst_mask */
438 TRUE), /* pcrel_offset */
439
440 /* A relative 16 bit branch; the lower two bits must be zero. */
441 HOWTO (R_PPC64_REL14, /* type */
442 0, /* rightshift */
443 2, /* size (0 = byte, 1 = short, 2 = long) */
444 16, /* bitsize */
445 TRUE, /* pc_relative */
446 0, /* bitpos */
447 complain_overflow_signed, /* complain_on_overflow */
448 ppc64_elf_branch_reloc, /* special_function */
449 "R_PPC64_REL14", /* name */
450 FALSE, /* partial_inplace */
451 0, /* src_mask */
452 0x0000fffc, /* dst_mask */
453 TRUE), /* pcrel_offset */
454
455 /* A relative 16 bit branch. Bit 10 should be set to indicate that
456 the branch is expected to be taken. The lower two bits must be
457 zero. */
458 HOWTO (R_PPC64_REL14_BRTAKEN, /* type */
459 0, /* rightshift */
460 2, /* size (0 = byte, 1 = short, 2 = long) */
461 16, /* bitsize */
462 TRUE, /* pc_relative */
463 0, /* bitpos */
464 complain_overflow_signed, /* complain_on_overflow */
465 ppc64_elf_brtaken_reloc, /* special_function */
466 "R_PPC64_REL14_BRTAKEN", /* name */
467 FALSE, /* partial_inplace */
468 0, /* src_mask */
469 0x0000fffc, /* dst_mask */
470 TRUE), /* pcrel_offset */
471
472 /* A relative 16 bit branch. Bit 10 should be set to indicate that
473 the branch is not expected to be taken. The lower two bits must
474 be zero. */
475 HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */
476 0, /* rightshift */
477 2, /* size (0 = byte, 1 = short, 2 = long) */
478 16, /* bitsize */
479 TRUE, /* pc_relative */
480 0, /* bitpos */
481 complain_overflow_signed, /* complain_on_overflow */
482 ppc64_elf_brtaken_reloc, /* special_function */
483 "R_PPC64_REL14_BRNTAKEN",/* name */
484 FALSE, /* partial_inplace */
485 0, /* src_mask */
486 0x0000fffc, /* dst_mask */
487 TRUE), /* pcrel_offset */
488
489 /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
490 symbol. */
491 HOWTO (R_PPC64_GOT16, /* type */
492 0, /* rightshift */
493 1, /* size (0 = byte, 1 = short, 2 = long) */
494 16, /* bitsize */
495 FALSE, /* pc_relative */
496 0, /* bitpos */
497 complain_overflow_signed, /* complain_on_overflow */
498 ppc64_elf_unhandled_reloc, /* special_function */
499 "R_PPC64_GOT16", /* name */
500 FALSE, /* partial_inplace */
501 0, /* src_mask */
502 0xffff, /* dst_mask */
503 FALSE), /* pcrel_offset */
504
505 /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
506 the symbol. */
507 HOWTO (R_PPC64_GOT16_LO, /* type */
508 0, /* rightshift */
509 1, /* size (0 = byte, 1 = short, 2 = long) */
510 16, /* bitsize */
511 FALSE, /* pc_relative */
512 0, /* bitpos */
513 complain_overflow_dont, /* complain_on_overflow */
514 ppc64_elf_unhandled_reloc, /* special_function */
515 "R_PPC64_GOT16_LO", /* name */
516 FALSE, /* partial_inplace */
517 0, /* src_mask */
518 0xffff, /* dst_mask */
519 FALSE), /* pcrel_offset */
520
521 /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
522 the symbol. */
523 HOWTO (R_PPC64_GOT16_HI, /* type */
524 16, /* rightshift */
525 1, /* size (0 = byte, 1 = short, 2 = long) */
526 16, /* bitsize */
527 FALSE, /* pc_relative */
528 0, /* bitpos */
529 complain_overflow_signed,/* complain_on_overflow */
530 ppc64_elf_unhandled_reloc, /* special_function */
531 "R_PPC64_GOT16_HI", /* name */
532 FALSE, /* partial_inplace */
533 0, /* src_mask */
534 0xffff, /* dst_mask */
535 FALSE), /* pcrel_offset */
536
537 /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
538 the symbol. */
539 HOWTO (R_PPC64_GOT16_HA, /* type */
540 16, /* rightshift */
541 1, /* size (0 = byte, 1 = short, 2 = long) */
542 16, /* bitsize */
543 FALSE, /* pc_relative */
544 0, /* bitpos */
545 complain_overflow_signed,/* complain_on_overflow */
546 ppc64_elf_unhandled_reloc, /* special_function */
547 "R_PPC64_GOT16_HA", /* name */
548 FALSE, /* partial_inplace */
549 0, /* src_mask */
550 0xffff, /* dst_mask */
551 FALSE), /* pcrel_offset */
552
553 /* This is used only by the dynamic linker. The symbol should exist
554 both in the object being run and in some shared library. The
555 dynamic linker copies the data addressed by the symbol from the
556 shared library into the object, because the object being
557 run has to have the data at some particular address. */
558 HOWTO (R_PPC64_COPY, /* type */
559 0, /* rightshift */
560 0, /* this one is variable size */
561 0, /* bitsize */
562 FALSE, /* pc_relative */
563 0, /* bitpos */
564 complain_overflow_dont, /* complain_on_overflow */
565 ppc64_elf_unhandled_reloc, /* special_function */
566 "R_PPC64_COPY", /* name */
567 FALSE, /* partial_inplace */
568 0, /* src_mask */
569 0, /* dst_mask */
570 FALSE), /* pcrel_offset */
571
572 /* Like R_PPC64_ADDR64, but used when setting global offset table
573 entries. */
574 HOWTO (R_PPC64_GLOB_DAT, /* type */
575 0, /* rightshift */
576 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
577 64, /* bitsize */
578 FALSE, /* pc_relative */
579 0, /* bitpos */
580 complain_overflow_dont, /* complain_on_overflow */
581 ppc64_elf_unhandled_reloc, /* special_function */
582 "R_PPC64_GLOB_DAT", /* name */
583 FALSE, /* partial_inplace */
584 0, /* src_mask */
585 ONES (64), /* dst_mask */
586 FALSE), /* pcrel_offset */
587
588 /* Created by the link editor. Marks a procedure linkage table
589 entry for a symbol. */
590 HOWTO (R_PPC64_JMP_SLOT, /* type */
591 0, /* rightshift */
592 0, /* size (0 = byte, 1 = short, 2 = long) */
593 0, /* bitsize */
594 FALSE, /* pc_relative */
595 0, /* bitpos */
596 complain_overflow_dont, /* complain_on_overflow */
597 ppc64_elf_unhandled_reloc, /* special_function */
598 "R_PPC64_JMP_SLOT", /* name */
599 FALSE, /* partial_inplace */
600 0, /* src_mask */
601 0, /* dst_mask */
602 FALSE), /* pcrel_offset */
603
604 /* Used only by the dynamic linker. When the object is run, this
605 doubleword64 is set to the load address of the object, plus the
606 addend. */
607 HOWTO (R_PPC64_RELATIVE, /* type */
608 0, /* rightshift */
609 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
610 64, /* bitsize */
611 FALSE, /* pc_relative */
612 0, /* bitpos */
613 complain_overflow_dont, /* complain_on_overflow */
614 bfd_elf_generic_reloc, /* special_function */
615 "R_PPC64_RELATIVE", /* name */
616 FALSE, /* partial_inplace */
617 0, /* src_mask */
618 ONES (64), /* dst_mask */
619 FALSE), /* pcrel_offset */
620
621 /* Like R_PPC64_ADDR32, but may be unaligned. */
622 HOWTO (R_PPC64_UADDR32, /* type */
623 0, /* rightshift */
624 2, /* size (0 = byte, 1 = short, 2 = long) */
625 32, /* bitsize */
626 FALSE, /* pc_relative */
627 0, /* bitpos */
628 complain_overflow_bitfield, /* complain_on_overflow */
629 bfd_elf_generic_reloc, /* special_function */
630 "R_PPC64_UADDR32", /* name */
631 FALSE, /* partial_inplace */
632 0, /* src_mask */
633 0xffffffff, /* dst_mask */
634 FALSE), /* pcrel_offset */
635
636 /* Like R_PPC64_ADDR16, but may be unaligned. */
637 HOWTO (R_PPC64_UADDR16, /* type */
638 0, /* rightshift */
639 1, /* size (0 = byte, 1 = short, 2 = long) */
640 16, /* bitsize */
641 FALSE, /* pc_relative */
642 0, /* bitpos */
643 complain_overflow_bitfield, /* complain_on_overflow */
644 bfd_elf_generic_reloc, /* special_function */
645 "R_PPC64_UADDR16", /* name */
646 FALSE, /* partial_inplace */
647 0, /* src_mask */
648 0xffff, /* dst_mask */
649 FALSE), /* pcrel_offset */
650
651 /* 32-bit PC relative. */
652 HOWTO (R_PPC64_REL32, /* type */
653 0, /* rightshift */
654 2, /* size (0 = byte, 1 = short, 2 = long) */
655 32, /* bitsize */
656 TRUE, /* pc_relative */
657 0, /* bitpos */
658 complain_overflow_signed, /* complain_on_overflow */
659 bfd_elf_generic_reloc, /* special_function */
660 "R_PPC64_REL32", /* name */
661 FALSE, /* partial_inplace */
662 0, /* src_mask */
663 0xffffffff, /* dst_mask */
664 TRUE), /* pcrel_offset */
665
666 /* 32-bit relocation to the symbol's procedure linkage table. */
667 HOWTO (R_PPC64_PLT32, /* type */
668 0, /* rightshift */
669 2, /* size (0 = byte, 1 = short, 2 = long) */
670 32, /* bitsize */
671 FALSE, /* pc_relative */
672 0, /* bitpos */
673 complain_overflow_bitfield, /* complain_on_overflow */
674 ppc64_elf_unhandled_reloc, /* special_function */
675 "R_PPC64_PLT32", /* name */
676 FALSE, /* partial_inplace */
677 0, /* src_mask */
678 0xffffffff, /* dst_mask */
679 FALSE), /* pcrel_offset */
680
681 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
682 FIXME: R_PPC64_PLTREL32 not supported. */
683 HOWTO (R_PPC64_PLTREL32, /* type */
684 0, /* rightshift */
685 2, /* size (0 = byte, 1 = short, 2 = long) */
686 32, /* bitsize */
687 TRUE, /* pc_relative */
688 0, /* bitpos */
689 complain_overflow_signed, /* complain_on_overflow */
690 bfd_elf_generic_reloc, /* special_function */
691 "R_PPC64_PLTREL32", /* name */
692 FALSE, /* partial_inplace */
693 0, /* src_mask */
694 0xffffffff, /* dst_mask */
695 TRUE), /* pcrel_offset */
696
697 /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
698 the symbol. */
699 HOWTO (R_PPC64_PLT16_LO, /* type */
700 0, /* rightshift */
701 1, /* size (0 = byte, 1 = short, 2 = long) */
702 16, /* bitsize */
703 FALSE, /* pc_relative */
704 0, /* bitpos */
705 complain_overflow_dont, /* complain_on_overflow */
706 ppc64_elf_unhandled_reloc, /* special_function */
707 "R_PPC64_PLT16_LO", /* name */
708 FALSE, /* partial_inplace */
709 0, /* src_mask */
710 0xffff, /* dst_mask */
711 FALSE), /* pcrel_offset */
712
713 /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
714 the symbol. */
715 HOWTO (R_PPC64_PLT16_HI, /* type */
716 16, /* rightshift */
717 1, /* size (0 = byte, 1 = short, 2 = long) */
718 16, /* bitsize */
719 FALSE, /* pc_relative */
720 0, /* bitpos */
721 complain_overflow_signed, /* complain_on_overflow */
722 ppc64_elf_unhandled_reloc, /* special_function */
723 "R_PPC64_PLT16_HI", /* name */
724 FALSE, /* partial_inplace */
725 0, /* src_mask */
726 0xffff, /* dst_mask */
727 FALSE), /* pcrel_offset */
728
729 /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
730 the symbol. */
731 HOWTO (R_PPC64_PLT16_HA, /* type */
732 16, /* rightshift */
733 1, /* size (0 = byte, 1 = short, 2 = long) */
734 16, /* bitsize */
735 FALSE, /* pc_relative */
736 0, /* bitpos */
737 complain_overflow_signed, /* complain_on_overflow */
738 ppc64_elf_unhandled_reloc, /* special_function */
739 "R_PPC64_PLT16_HA", /* name */
740 FALSE, /* partial_inplace */
741 0, /* src_mask */
742 0xffff, /* dst_mask */
743 FALSE), /* pcrel_offset */
744
745 /* 16-bit section relative relocation. */
746 HOWTO (R_PPC64_SECTOFF, /* type */
747 0, /* rightshift */
748 1, /* size (0 = byte, 1 = short, 2 = long) */
749 16, /* bitsize */
750 FALSE, /* pc_relative */
751 0, /* bitpos */
752 complain_overflow_signed, /* complain_on_overflow */
753 ppc64_elf_sectoff_reloc, /* special_function */
754 "R_PPC64_SECTOFF", /* name */
755 FALSE, /* partial_inplace */
756 0, /* src_mask */
757 0xffff, /* dst_mask */
758 FALSE), /* pcrel_offset */
759
760 /* Like R_PPC64_SECTOFF, but no overflow warning. */
761 HOWTO (R_PPC64_SECTOFF_LO, /* type */
762 0, /* rightshift */
763 1, /* size (0 = byte, 1 = short, 2 = long) */
764 16, /* bitsize */
765 FALSE, /* pc_relative */
766 0, /* bitpos */
767 complain_overflow_dont, /* complain_on_overflow */
768 ppc64_elf_sectoff_reloc, /* special_function */
769 "R_PPC64_SECTOFF_LO", /* name */
770 FALSE, /* partial_inplace */
771 0, /* src_mask */
772 0xffff, /* dst_mask */
773 FALSE), /* pcrel_offset */
774
775 /* 16-bit upper half section relative relocation. */
776 HOWTO (R_PPC64_SECTOFF_HI, /* type */
777 16, /* rightshift */
778 1, /* size (0 = byte, 1 = short, 2 = long) */
779 16, /* bitsize */
780 FALSE, /* pc_relative */
781 0, /* bitpos */
782 complain_overflow_signed, /* complain_on_overflow */
783 ppc64_elf_sectoff_reloc, /* special_function */
784 "R_PPC64_SECTOFF_HI", /* name */
785 FALSE, /* partial_inplace */
786 0, /* src_mask */
787 0xffff, /* dst_mask */
788 FALSE), /* pcrel_offset */
789
790 /* 16-bit upper half adjusted section relative relocation. */
791 HOWTO (R_PPC64_SECTOFF_HA, /* type */
792 16, /* rightshift */
793 1, /* size (0 = byte, 1 = short, 2 = long) */
794 16, /* bitsize */
795 FALSE, /* pc_relative */
796 0, /* bitpos */
797 complain_overflow_signed, /* complain_on_overflow */
798 ppc64_elf_sectoff_ha_reloc, /* special_function */
799 "R_PPC64_SECTOFF_HA", /* name */
800 FALSE, /* partial_inplace */
801 0, /* src_mask */
802 0xffff, /* dst_mask */
803 FALSE), /* pcrel_offset */
804
805 /* Like R_PPC64_REL24 without touching the two least significant bits. */
806 HOWTO (R_PPC64_REL30, /* type */
807 2, /* rightshift */
808 2, /* size (0 = byte, 1 = short, 2 = long) */
809 30, /* bitsize */
810 TRUE, /* pc_relative */
811 0, /* bitpos */
812 complain_overflow_dont, /* complain_on_overflow */
813 bfd_elf_generic_reloc, /* special_function */
814 "R_PPC64_REL30", /* name */
815 FALSE, /* partial_inplace */
816 0, /* src_mask */
817 0xfffffffc, /* dst_mask */
818 TRUE), /* pcrel_offset */
819
820 /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
821
822 /* A standard 64-bit relocation. */
823 HOWTO (R_PPC64_ADDR64, /* type */
824 0, /* rightshift */
825 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
826 64, /* bitsize */
827 FALSE, /* pc_relative */
828 0, /* bitpos */
829 complain_overflow_dont, /* complain_on_overflow */
830 bfd_elf_generic_reloc, /* special_function */
831 "R_PPC64_ADDR64", /* name */
832 FALSE, /* partial_inplace */
833 0, /* src_mask */
834 ONES (64), /* dst_mask */
835 FALSE), /* pcrel_offset */
836
837 /* The bits 32-47 of an address. */
838 HOWTO (R_PPC64_ADDR16_HIGHER, /* type */
839 32, /* rightshift */
840 1, /* size (0 = byte, 1 = short, 2 = long) */
841 16, /* bitsize */
842 FALSE, /* pc_relative */
843 0, /* bitpos */
844 complain_overflow_dont, /* complain_on_overflow */
845 bfd_elf_generic_reloc, /* special_function */
846 "R_PPC64_ADDR16_HIGHER", /* name */
847 FALSE, /* partial_inplace */
848 0, /* src_mask */
849 0xffff, /* dst_mask */
850 FALSE), /* pcrel_offset */
851
852 /* The bits 32-47 of an address, plus 1 if the contents of the low
853 16 bits, treated as a signed number, is negative. */
854 HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */
855 32, /* rightshift */
856 1, /* size (0 = byte, 1 = short, 2 = long) */
857 16, /* bitsize */
858 FALSE, /* pc_relative */
859 0, /* bitpos */
860 complain_overflow_dont, /* complain_on_overflow */
861 ppc64_elf_ha_reloc, /* special_function */
862 "R_PPC64_ADDR16_HIGHERA", /* name */
863 FALSE, /* partial_inplace */
864 0, /* src_mask */
865 0xffff, /* dst_mask */
866 FALSE), /* pcrel_offset */
867
868 /* The bits 48-63 of an address. */
869 HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */
870 48, /* rightshift */
871 1, /* size (0 = byte, 1 = short, 2 = long) */
872 16, /* bitsize */
873 FALSE, /* pc_relative */
874 0, /* bitpos */
875 complain_overflow_dont, /* complain_on_overflow */
876 bfd_elf_generic_reloc, /* special_function */
877 "R_PPC64_ADDR16_HIGHEST", /* name */
878 FALSE, /* partial_inplace */
879 0, /* src_mask */
880 0xffff, /* dst_mask */
881 FALSE), /* pcrel_offset */
882
883 /* The bits 48-63 of an address, plus 1 if the contents of the low
884 16 bits, treated as a signed number, is negative. */
885 HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */
886 48, /* rightshift */
887 1, /* size (0 = byte, 1 = short, 2 = long) */
888 16, /* bitsize */
889 FALSE, /* pc_relative */
890 0, /* bitpos */
891 complain_overflow_dont, /* complain_on_overflow */
892 ppc64_elf_ha_reloc, /* special_function */
893 "R_PPC64_ADDR16_HIGHESTA", /* name */
894 FALSE, /* partial_inplace */
895 0, /* src_mask */
896 0xffff, /* dst_mask */
897 FALSE), /* pcrel_offset */
898
899 /* Like ADDR64, but may be unaligned. */
900 HOWTO (R_PPC64_UADDR64, /* type */
901 0, /* rightshift */
902 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
903 64, /* bitsize */
904 FALSE, /* pc_relative */
905 0, /* bitpos */
906 complain_overflow_dont, /* complain_on_overflow */
907 bfd_elf_generic_reloc, /* special_function */
908 "R_PPC64_UADDR64", /* name */
909 FALSE, /* partial_inplace */
910 0, /* src_mask */
911 ONES (64), /* dst_mask */
912 FALSE), /* pcrel_offset */
913
914 /* 64-bit relative relocation. */
915 HOWTO (R_PPC64_REL64, /* type */
916 0, /* rightshift */
917 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
918 64, /* bitsize */
919 TRUE, /* pc_relative */
920 0, /* bitpos */
921 complain_overflow_dont, /* complain_on_overflow */
922 bfd_elf_generic_reloc, /* special_function */
923 "R_PPC64_REL64", /* name */
924 FALSE, /* partial_inplace */
925 0, /* src_mask */
926 ONES (64), /* dst_mask */
927 TRUE), /* pcrel_offset */
928
929 /* 64-bit relocation to the symbol's procedure linkage table. */
930 HOWTO (R_PPC64_PLT64, /* type */
931 0, /* rightshift */
932 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
933 64, /* bitsize */
934 FALSE, /* pc_relative */
935 0, /* bitpos */
936 complain_overflow_dont, /* complain_on_overflow */
937 ppc64_elf_unhandled_reloc, /* special_function */
938 "R_PPC64_PLT64", /* name */
939 FALSE, /* partial_inplace */
940 0, /* src_mask */
941 ONES (64), /* dst_mask */
942 FALSE), /* pcrel_offset */
943
944 /* 64-bit PC relative relocation to the symbol's procedure linkage
945 table. */
946 /* FIXME: R_PPC64_PLTREL64 not supported. */
947 HOWTO (R_PPC64_PLTREL64, /* type */
948 0, /* rightshift */
949 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
950 64, /* bitsize */
951 TRUE, /* pc_relative */
952 0, /* bitpos */
953 complain_overflow_dont, /* complain_on_overflow */
954 ppc64_elf_unhandled_reloc, /* special_function */
955 "R_PPC64_PLTREL64", /* name */
956 FALSE, /* partial_inplace */
957 0, /* src_mask */
958 ONES (64), /* dst_mask */
959 TRUE), /* pcrel_offset */
960
961 /* 16 bit TOC-relative relocation. */
962
963 /* R_PPC64_TOC16 47 half16* S + A - .TOC. */
964 HOWTO (R_PPC64_TOC16, /* type */
965 0, /* rightshift */
966 1, /* size (0 = byte, 1 = short, 2 = long) */
967 16, /* bitsize */
968 FALSE, /* pc_relative */
969 0, /* bitpos */
970 complain_overflow_signed, /* complain_on_overflow */
971 ppc64_elf_toc_reloc, /* special_function */
972 "R_PPC64_TOC16", /* name */
973 FALSE, /* partial_inplace */
974 0, /* src_mask */
975 0xffff, /* dst_mask */
976 FALSE), /* pcrel_offset */
977
978 /* 16 bit TOC-relative relocation without overflow. */
979
980 /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
981 HOWTO (R_PPC64_TOC16_LO, /* type */
982 0, /* rightshift */
983 1, /* size (0 = byte, 1 = short, 2 = long) */
984 16, /* bitsize */
985 FALSE, /* pc_relative */
986 0, /* bitpos */
987 complain_overflow_dont, /* complain_on_overflow */
988 ppc64_elf_toc_reloc, /* special_function */
989 "R_PPC64_TOC16_LO", /* name */
990 FALSE, /* partial_inplace */
991 0, /* src_mask */
992 0xffff, /* dst_mask */
993 FALSE), /* pcrel_offset */
994
995 /* 16 bit TOC-relative relocation, high 16 bits. */
996
997 /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
998 HOWTO (R_PPC64_TOC16_HI, /* type */
999 16, /* rightshift */
1000 1, /* size (0 = byte, 1 = short, 2 = long) */
1001 16, /* bitsize */
1002 FALSE, /* pc_relative */
1003 0, /* bitpos */
1004 complain_overflow_signed, /* complain_on_overflow */
1005 ppc64_elf_toc_reloc, /* special_function */
1006 "R_PPC64_TOC16_HI", /* name */
1007 FALSE, /* partial_inplace */
1008 0, /* src_mask */
1009 0xffff, /* dst_mask */
1010 FALSE), /* pcrel_offset */
1011
1012 /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the
1013 contents of the low 16 bits, treated as a signed number, is
1014 negative. */
1015
1016 /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
1017 HOWTO (R_PPC64_TOC16_HA, /* type */
1018 16, /* rightshift */
1019 1, /* size (0 = byte, 1 = short, 2 = long) */
1020 16, /* bitsize */
1021 FALSE, /* pc_relative */
1022 0, /* bitpos */
1023 complain_overflow_signed, /* complain_on_overflow */
1024 ppc64_elf_toc_ha_reloc, /* special_function */
1025 "R_PPC64_TOC16_HA", /* name */
1026 FALSE, /* partial_inplace */
1027 0, /* src_mask */
1028 0xffff, /* dst_mask */
1029 FALSE), /* pcrel_offset */
1030
1031 /* 64-bit relocation; insert value of TOC base (.TOC.). */
1032
1033 /* R_PPC64_TOC 51 doubleword64 .TOC. */
1034 HOWTO (R_PPC64_TOC, /* type */
1035 0, /* rightshift */
1036 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1037 64, /* bitsize */
1038 FALSE, /* pc_relative */
1039 0, /* bitpos */
1040 complain_overflow_dont, /* complain_on_overflow */
1041 ppc64_elf_toc64_reloc, /* special_function */
1042 "R_PPC64_TOC", /* name */
1043 FALSE, /* partial_inplace */
1044 0, /* src_mask */
1045 ONES (64), /* dst_mask */
1046 FALSE), /* pcrel_offset */
1047
1048 /* Like R_PPC64_GOT16, but also informs the link editor that the
1049 value to relocate may (!) refer to a PLT entry which the link
1050 editor (a) may replace with the symbol value. If the link editor
1051 is unable to fully resolve the symbol, it may (b) create a PLT
1052 entry and store the address to the new PLT entry in the GOT.
1053 This permits lazy resolution of function symbols at run time.
1054 The link editor may also skip all of this and just (c) emit a
1055 R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
1056 /* FIXME: R_PPC64_PLTGOT16 not implemented. */
1057 HOWTO (R_PPC64_PLTGOT16, /* type */
1058 0, /* rightshift */
1059 1, /* size (0 = byte, 1 = short, 2 = long) */
1060 16, /* bitsize */
1061 FALSE, /* pc_relative */
1062 0, /* bitpos */
1063 complain_overflow_signed, /* complain_on_overflow */
1064 ppc64_elf_unhandled_reloc, /* special_function */
1065 "R_PPC64_PLTGOT16", /* name */
1066 FALSE, /* partial_inplace */
1067 0, /* src_mask */
1068 0xffff, /* dst_mask */
1069 FALSE), /* pcrel_offset */
1070
1071 /* Like R_PPC64_PLTGOT16, but without overflow. */
1072 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1073 HOWTO (R_PPC64_PLTGOT16_LO, /* type */
1074 0, /* rightshift */
1075 1, /* size (0 = byte, 1 = short, 2 = long) */
1076 16, /* bitsize */
1077 FALSE, /* pc_relative */
1078 0, /* bitpos */
1079 complain_overflow_dont, /* complain_on_overflow */
1080 ppc64_elf_unhandled_reloc, /* special_function */
1081 "R_PPC64_PLTGOT16_LO", /* name */
1082 FALSE, /* partial_inplace */
1083 0, /* src_mask */
1084 0xffff, /* dst_mask */
1085 FALSE), /* pcrel_offset */
1086
1087 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */
1088 /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */
1089 HOWTO (R_PPC64_PLTGOT16_HI, /* type */
1090 16, /* rightshift */
1091 1, /* size (0 = byte, 1 = short, 2 = long) */
1092 16, /* bitsize */
1093 FALSE, /* pc_relative */
1094 0, /* bitpos */
1095 complain_overflow_signed, /* complain_on_overflow */
1096 ppc64_elf_unhandled_reloc, /* special_function */
1097 "R_PPC64_PLTGOT16_HI", /* name */
1098 FALSE, /* partial_inplace */
1099 0, /* src_mask */
1100 0xffff, /* dst_mask */
1101 FALSE), /* pcrel_offset */
1102
1103 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus
1104 1 if the contents of the low 16 bits, treated as a signed number,
1105 is negative. */
1106 /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */
1107 HOWTO (R_PPC64_PLTGOT16_HA, /* type */
1108 16, /* rightshift */
1109 1, /* size (0 = byte, 1 = short, 2 = long) */
1110 16, /* bitsize */
1111 FALSE, /* pc_relative */
1112 0, /* bitpos */
1113 complain_overflow_signed, /* complain_on_overflow */
1114 ppc64_elf_unhandled_reloc, /* special_function */
1115 "R_PPC64_PLTGOT16_HA", /* name */
1116 FALSE, /* partial_inplace */
1117 0, /* src_mask */
1118 0xffff, /* dst_mask */
1119 FALSE), /* pcrel_offset */
1120
1121 /* Like R_PPC64_ADDR16, but for instructions with a DS field. */
1122 HOWTO (R_PPC64_ADDR16_DS, /* type */
1123 0, /* rightshift */
1124 1, /* size (0 = byte, 1 = short, 2 = long) */
1125 16, /* bitsize */
1126 FALSE, /* pc_relative */
1127 0, /* bitpos */
1128 complain_overflow_signed, /* complain_on_overflow */
1129 bfd_elf_generic_reloc, /* special_function */
1130 "R_PPC64_ADDR16_DS", /* name */
1131 FALSE, /* partial_inplace */
1132 0, /* src_mask */
1133 0xfffc, /* dst_mask */
1134 FALSE), /* pcrel_offset */
1135
1136 /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
1137 HOWTO (R_PPC64_ADDR16_LO_DS, /* type */
1138 0, /* rightshift */
1139 1, /* size (0 = byte, 1 = short, 2 = long) */
1140 16, /* bitsize */
1141 FALSE, /* pc_relative */
1142 0, /* bitpos */
1143 complain_overflow_dont,/* complain_on_overflow */
1144 bfd_elf_generic_reloc, /* special_function */
1145 "R_PPC64_ADDR16_LO_DS",/* name */
1146 FALSE, /* partial_inplace */
1147 0, /* src_mask */
1148 0xfffc, /* dst_mask */
1149 FALSE), /* pcrel_offset */
1150
1151 /* Like R_PPC64_GOT16, but for instructions with a DS field. */
1152 HOWTO (R_PPC64_GOT16_DS, /* type */
1153 0, /* rightshift */
1154 1, /* size (0 = byte, 1 = short, 2 = long) */
1155 16, /* bitsize */
1156 FALSE, /* pc_relative */
1157 0, /* bitpos */
1158 complain_overflow_signed, /* complain_on_overflow */
1159 ppc64_elf_unhandled_reloc, /* special_function */
1160 "R_PPC64_GOT16_DS", /* name */
1161 FALSE, /* partial_inplace */
1162 0, /* src_mask */
1163 0xfffc, /* dst_mask */
1164 FALSE), /* pcrel_offset */
1165
1166 /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
1167 HOWTO (R_PPC64_GOT16_LO_DS, /* type */
1168 0, /* rightshift */
1169 1, /* size (0 = byte, 1 = short, 2 = long) */
1170 16, /* bitsize */
1171 FALSE, /* pc_relative */
1172 0, /* bitpos */
1173 complain_overflow_dont, /* complain_on_overflow */
1174 ppc64_elf_unhandled_reloc, /* special_function */
1175 "R_PPC64_GOT16_LO_DS", /* name */
1176 FALSE, /* partial_inplace */
1177 0, /* src_mask */
1178 0xfffc, /* dst_mask */
1179 FALSE), /* pcrel_offset */
1180
1181 /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
1182 HOWTO (R_PPC64_PLT16_LO_DS, /* type */
1183 0, /* rightshift */
1184 1, /* size (0 = byte, 1 = short, 2 = long) */
1185 16, /* bitsize */
1186 FALSE, /* pc_relative */
1187 0, /* bitpos */
1188 complain_overflow_dont, /* complain_on_overflow */
1189 ppc64_elf_unhandled_reloc, /* special_function */
1190 "R_PPC64_PLT16_LO_DS", /* name */
1191 FALSE, /* partial_inplace */
1192 0, /* src_mask */
1193 0xfffc, /* dst_mask */
1194 FALSE), /* pcrel_offset */
1195
1196 /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
1197 HOWTO (R_PPC64_SECTOFF_DS, /* type */
1198 0, /* rightshift */
1199 1, /* size (0 = byte, 1 = short, 2 = long) */
1200 16, /* bitsize */
1201 FALSE, /* pc_relative */
1202 0, /* bitpos */
1203 complain_overflow_signed, /* complain_on_overflow */
1204 ppc64_elf_sectoff_reloc, /* special_function */
1205 "R_PPC64_SECTOFF_DS", /* name */
1206 FALSE, /* partial_inplace */
1207 0, /* src_mask */
1208 0xfffc, /* dst_mask */
1209 FALSE), /* pcrel_offset */
1210
1211 /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
1212 HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */
1213 0, /* rightshift */
1214 1, /* size (0 = byte, 1 = short, 2 = long) */
1215 16, /* bitsize */
1216 FALSE, /* pc_relative */
1217 0, /* bitpos */
1218 complain_overflow_dont, /* complain_on_overflow */
1219 ppc64_elf_sectoff_reloc, /* special_function */
1220 "R_PPC64_SECTOFF_LO_DS",/* name */
1221 FALSE, /* partial_inplace */
1222 0, /* src_mask */
1223 0xfffc, /* dst_mask */
1224 FALSE), /* pcrel_offset */
1225
1226 /* Like R_PPC64_TOC16, but for instructions with a DS field. */
1227 HOWTO (R_PPC64_TOC16_DS, /* type */
1228 0, /* rightshift */
1229 1, /* size (0 = byte, 1 = short, 2 = long) */
1230 16, /* bitsize */
1231 FALSE, /* pc_relative */
1232 0, /* bitpos */
1233 complain_overflow_signed, /* complain_on_overflow */
1234 ppc64_elf_toc_reloc, /* special_function */
1235 "R_PPC64_TOC16_DS", /* name */
1236 FALSE, /* partial_inplace */
1237 0, /* src_mask */
1238 0xfffc, /* dst_mask */
1239 FALSE), /* pcrel_offset */
1240
1241 /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
1242 HOWTO (R_PPC64_TOC16_LO_DS, /* type */
1243 0, /* rightshift */
1244 1, /* size (0 = byte, 1 = short, 2 = long) */
1245 16, /* bitsize */
1246 FALSE, /* pc_relative */
1247 0, /* bitpos */
1248 complain_overflow_dont, /* complain_on_overflow */
1249 ppc64_elf_toc_reloc, /* special_function */
1250 "R_PPC64_TOC16_LO_DS", /* name */
1251 FALSE, /* partial_inplace */
1252 0, /* src_mask */
1253 0xfffc, /* dst_mask */
1254 FALSE), /* pcrel_offset */
1255
1256 /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
1257 /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
1258 HOWTO (R_PPC64_PLTGOT16_DS, /* type */
1259 0, /* rightshift */
1260 1, /* size (0 = byte, 1 = short, 2 = long) */
1261 16, /* bitsize */
1262 FALSE, /* pc_relative */
1263 0, /* bitpos */
1264 complain_overflow_signed, /* complain_on_overflow */
1265 ppc64_elf_unhandled_reloc, /* special_function */
1266 "R_PPC64_PLTGOT16_DS", /* name */
1267 FALSE, /* partial_inplace */
1268 0, /* src_mask */
1269 0xfffc, /* dst_mask */
1270 FALSE), /* pcrel_offset */
1271
1272 /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */
1273 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1274 HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */
1275 0, /* rightshift */
1276 1, /* size (0 = byte, 1 = short, 2 = long) */
1277 16, /* bitsize */
1278 FALSE, /* pc_relative */
1279 0, /* bitpos */
1280 complain_overflow_dont, /* complain_on_overflow */
1281 ppc64_elf_unhandled_reloc, /* special_function */
1282 "R_PPC64_PLTGOT16_LO_DS",/* name */
1283 FALSE, /* partial_inplace */
1284 0, /* src_mask */
1285 0xfffc, /* dst_mask */
1286 FALSE), /* pcrel_offset */
1287
1288 /* Marker relocs for TLS. */
1289 HOWTO (R_PPC64_TLS,
1290 0, /* rightshift */
1291 2, /* size (0 = byte, 1 = short, 2 = long) */
1292 32, /* bitsize */
1293 FALSE, /* pc_relative */
1294 0, /* bitpos */
1295 complain_overflow_dont, /* complain_on_overflow */
1296 bfd_elf_generic_reloc, /* special_function */
1297 "R_PPC64_TLS", /* name */
1298 FALSE, /* partial_inplace */
1299 0, /* src_mask */
1300 0, /* dst_mask */
1301 FALSE), /* pcrel_offset */
1302
1303 HOWTO (R_PPC64_TLSGD,
1304 0, /* rightshift */
1305 2, /* size (0 = byte, 1 = short, 2 = long) */
1306 32, /* bitsize */
1307 FALSE, /* pc_relative */
1308 0, /* bitpos */
1309 complain_overflow_dont, /* complain_on_overflow */
1310 bfd_elf_generic_reloc, /* special_function */
1311 "R_PPC64_TLSGD", /* name */
1312 FALSE, /* partial_inplace */
1313 0, /* src_mask */
1314 0, /* dst_mask */
1315 FALSE), /* pcrel_offset */
1316
1317 HOWTO (R_PPC64_TLSLD,
1318 0, /* rightshift */
1319 2, /* size (0 = byte, 1 = short, 2 = long) */
1320 32, /* bitsize */
1321 FALSE, /* pc_relative */
1322 0, /* bitpos */
1323 complain_overflow_dont, /* complain_on_overflow */
1324 bfd_elf_generic_reloc, /* special_function */
1325 "R_PPC64_TLSLD", /* name */
1326 FALSE, /* partial_inplace */
1327 0, /* src_mask */
1328 0, /* dst_mask */
1329 FALSE), /* pcrel_offset */
1330
1331 HOWTO (R_PPC64_TOCSAVE,
1332 0, /* rightshift */
1333 2, /* size (0 = byte, 1 = short, 2 = long) */
1334 32, /* bitsize */
1335 FALSE, /* pc_relative */
1336 0, /* bitpos */
1337 complain_overflow_dont, /* complain_on_overflow */
1338 bfd_elf_generic_reloc, /* special_function */
1339 "R_PPC64_TOCSAVE", /* name */
1340 FALSE, /* partial_inplace */
1341 0, /* src_mask */
1342 0, /* dst_mask */
1343 FALSE), /* pcrel_offset */
1344
1345 /* Computes the load module index of the load module that contains the
1346 definition of its TLS sym. */
1347 HOWTO (R_PPC64_DTPMOD64,
1348 0, /* rightshift */
1349 4, /* size (0 = byte, 1 = short, 2 = long) */
1350 64, /* bitsize */
1351 FALSE, /* pc_relative */
1352 0, /* bitpos */
1353 complain_overflow_dont, /* complain_on_overflow */
1354 ppc64_elf_unhandled_reloc, /* special_function */
1355 "R_PPC64_DTPMOD64", /* name */
1356 FALSE, /* partial_inplace */
1357 0, /* src_mask */
1358 ONES (64), /* dst_mask */
1359 FALSE), /* pcrel_offset */
1360
1361 /* Computes a dtv-relative displacement, the difference between the value
1362 of sym+add and the base address of the thread-local storage block that
1363 contains the definition of sym, minus 0x8000. */
1364 HOWTO (R_PPC64_DTPREL64,
1365 0, /* rightshift */
1366 4, /* size (0 = byte, 1 = short, 2 = long) */
1367 64, /* bitsize */
1368 FALSE, /* pc_relative */
1369 0, /* bitpos */
1370 complain_overflow_dont, /* complain_on_overflow */
1371 ppc64_elf_unhandled_reloc, /* special_function */
1372 "R_PPC64_DTPREL64", /* name */
1373 FALSE, /* partial_inplace */
1374 0, /* src_mask */
1375 ONES (64), /* dst_mask */
1376 FALSE), /* pcrel_offset */
1377
1378 /* A 16 bit dtprel reloc. */
1379 HOWTO (R_PPC64_DTPREL16,
1380 0, /* rightshift */
1381 1, /* size (0 = byte, 1 = short, 2 = long) */
1382 16, /* bitsize */
1383 FALSE, /* pc_relative */
1384 0, /* bitpos */
1385 complain_overflow_signed, /* complain_on_overflow */
1386 ppc64_elf_unhandled_reloc, /* special_function */
1387 "R_PPC64_DTPREL16", /* name */
1388 FALSE, /* partial_inplace */
1389 0, /* src_mask */
1390 0xffff, /* dst_mask */
1391 FALSE), /* pcrel_offset */
1392
1393 /* Like DTPREL16, but no overflow. */
1394 HOWTO (R_PPC64_DTPREL16_LO,
1395 0, /* rightshift */
1396 1, /* size (0 = byte, 1 = short, 2 = long) */
1397 16, /* bitsize */
1398 FALSE, /* pc_relative */
1399 0, /* bitpos */
1400 complain_overflow_dont, /* complain_on_overflow */
1401 ppc64_elf_unhandled_reloc, /* special_function */
1402 "R_PPC64_DTPREL16_LO", /* name */
1403 FALSE, /* partial_inplace */
1404 0, /* src_mask */
1405 0xffff, /* dst_mask */
1406 FALSE), /* pcrel_offset */
1407
1408 /* Like DTPREL16_LO, but next higher group of 16 bits. */
1409 HOWTO (R_PPC64_DTPREL16_HI,
1410 16, /* rightshift */
1411 1, /* size (0 = byte, 1 = short, 2 = long) */
1412 16, /* bitsize */
1413 FALSE, /* pc_relative */
1414 0, /* bitpos */
1415 complain_overflow_signed, /* complain_on_overflow */
1416 ppc64_elf_unhandled_reloc, /* special_function */
1417 "R_PPC64_DTPREL16_HI", /* name */
1418 FALSE, /* partial_inplace */
1419 0, /* src_mask */
1420 0xffff, /* dst_mask */
1421 FALSE), /* pcrel_offset */
1422
1423 /* Like DTPREL16_HI, but adjust for low 16 bits. */
1424 HOWTO (R_PPC64_DTPREL16_HA,
1425 16, /* rightshift */
1426 1, /* size (0 = byte, 1 = short, 2 = long) */
1427 16, /* bitsize */
1428 FALSE, /* pc_relative */
1429 0, /* bitpos */
1430 complain_overflow_signed, /* complain_on_overflow */
1431 ppc64_elf_unhandled_reloc, /* special_function */
1432 "R_PPC64_DTPREL16_HA", /* name */
1433 FALSE, /* partial_inplace */
1434 0, /* src_mask */
1435 0xffff, /* dst_mask */
1436 FALSE), /* pcrel_offset */
1437
1438 /* Like DTPREL16_HI, but next higher group of 16 bits. */
1439 HOWTO (R_PPC64_DTPREL16_HIGHER,
1440 32, /* rightshift */
1441 1, /* size (0 = byte, 1 = short, 2 = long) */
1442 16, /* bitsize */
1443 FALSE, /* pc_relative */
1444 0, /* bitpos */
1445 complain_overflow_dont, /* complain_on_overflow */
1446 ppc64_elf_unhandled_reloc, /* special_function */
1447 "R_PPC64_DTPREL16_HIGHER", /* name */
1448 FALSE, /* partial_inplace */
1449 0, /* src_mask */
1450 0xffff, /* dst_mask */
1451 FALSE), /* pcrel_offset */
1452
1453 /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */
1454 HOWTO (R_PPC64_DTPREL16_HIGHERA,
1455 32, /* rightshift */
1456 1, /* size (0 = byte, 1 = short, 2 = long) */
1457 16, /* bitsize */
1458 FALSE, /* pc_relative */
1459 0, /* bitpos */
1460 complain_overflow_dont, /* complain_on_overflow */
1461 ppc64_elf_unhandled_reloc, /* special_function */
1462 "R_PPC64_DTPREL16_HIGHERA", /* name */
1463 FALSE, /* partial_inplace */
1464 0, /* src_mask */
1465 0xffff, /* dst_mask */
1466 FALSE), /* pcrel_offset */
1467
1468 /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */
1469 HOWTO (R_PPC64_DTPREL16_HIGHEST,
1470 48, /* rightshift */
1471 1, /* size (0 = byte, 1 = short, 2 = long) */
1472 16, /* bitsize */
1473 FALSE, /* pc_relative */
1474 0, /* bitpos */
1475 complain_overflow_dont, /* complain_on_overflow */
1476 ppc64_elf_unhandled_reloc, /* special_function */
1477 "R_PPC64_DTPREL16_HIGHEST", /* name */
1478 FALSE, /* partial_inplace */
1479 0, /* src_mask */
1480 0xffff, /* dst_mask */
1481 FALSE), /* pcrel_offset */
1482
1483 /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */
1484 HOWTO (R_PPC64_DTPREL16_HIGHESTA,
1485 48, /* rightshift */
1486 1, /* size (0 = byte, 1 = short, 2 = long) */
1487 16, /* bitsize */
1488 FALSE, /* pc_relative */
1489 0, /* bitpos */
1490 complain_overflow_dont, /* complain_on_overflow */
1491 ppc64_elf_unhandled_reloc, /* special_function */
1492 "R_PPC64_DTPREL16_HIGHESTA", /* name */
1493 FALSE, /* partial_inplace */
1494 0, /* src_mask */
1495 0xffff, /* dst_mask */
1496 FALSE), /* pcrel_offset */
1497
1498 /* Like DTPREL16, but for insns with a DS field. */
1499 HOWTO (R_PPC64_DTPREL16_DS,
1500 0, /* rightshift */
1501 1, /* size (0 = byte, 1 = short, 2 = long) */
1502 16, /* bitsize */
1503 FALSE, /* pc_relative */
1504 0, /* bitpos */
1505 complain_overflow_signed, /* complain_on_overflow */
1506 ppc64_elf_unhandled_reloc, /* special_function */
1507 "R_PPC64_DTPREL16_DS", /* name */
1508 FALSE, /* partial_inplace */
1509 0, /* src_mask */
1510 0xfffc, /* dst_mask */
1511 FALSE), /* pcrel_offset */
1512
1513 /* Like DTPREL16_DS, but no overflow. */
1514 HOWTO (R_PPC64_DTPREL16_LO_DS,
1515 0, /* rightshift */
1516 1, /* size (0 = byte, 1 = short, 2 = long) */
1517 16, /* bitsize */
1518 FALSE, /* pc_relative */
1519 0, /* bitpos */
1520 complain_overflow_dont, /* complain_on_overflow */
1521 ppc64_elf_unhandled_reloc, /* special_function */
1522 "R_PPC64_DTPREL16_LO_DS", /* name */
1523 FALSE, /* partial_inplace */
1524 0, /* src_mask */
1525 0xfffc, /* dst_mask */
1526 FALSE), /* pcrel_offset */
1527
1528 /* Computes a tp-relative displacement, the difference between the value of
1529 sym+add and the value of the thread pointer (r13). */
1530 HOWTO (R_PPC64_TPREL64,
1531 0, /* rightshift */
1532 4, /* size (0 = byte, 1 = short, 2 = long) */
1533 64, /* bitsize */
1534 FALSE, /* pc_relative */
1535 0, /* bitpos */
1536 complain_overflow_dont, /* complain_on_overflow */
1537 ppc64_elf_unhandled_reloc, /* special_function */
1538 "R_PPC64_TPREL64", /* name */
1539 FALSE, /* partial_inplace */
1540 0, /* src_mask */
1541 ONES (64), /* dst_mask */
1542 FALSE), /* pcrel_offset */
1543
1544 /* A 16 bit tprel reloc. */
1545 HOWTO (R_PPC64_TPREL16,
1546 0, /* rightshift */
1547 1, /* size (0 = byte, 1 = short, 2 = long) */
1548 16, /* bitsize */
1549 FALSE, /* pc_relative */
1550 0, /* bitpos */
1551 complain_overflow_signed, /* complain_on_overflow */
1552 ppc64_elf_unhandled_reloc, /* special_function */
1553 "R_PPC64_TPREL16", /* name */
1554 FALSE, /* partial_inplace */
1555 0, /* src_mask */
1556 0xffff, /* dst_mask */
1557 FALSE), /* pcrel_offset */
1558
1559 /* Like TPREL16, but no overflow. */
1560 HOWTO (R_PPC64_TPREL16_LO,
1561 0, /* rightshift */
1562 1, /* size (0 = byte, 1 = short, 2 = long) */
1563 16, /* bitsize */
1564 FALSE, /* pc_relative */
1565 0, /* bitpos */
1566 complain_overflow_dont, /* complain_on_overflow */
1567 ppc64_elf_unhandled_reloc, /* special_function */
1568 "R_PPC64_TPREL16_LO", /* name */
1569 FALSE, /* partial_inplace */
1570 0, /* src_mask */
1571 0xffff, /* dst_mask */
1572 FALSE), /* pcrel_offset */
1573
1574 /* Like TPREL16_LO, but next higher group of 16 bits. */
1575 HOWTO (R_PPC64_TPREL16_HI,
1576 16, /* rightshift */
1577 1, /* size (0 = byte, 1 = short, 2 = long) */
1578 16, /* bitsize */
1579 FALSE, /* pc_relative */
1580 0, /* bitpos */
1581 complain_overflow_signed, /* complain_on_overflow */
1582 ppc64_elf_unhandled_reloc, /* special_function */
1583 "R_PPC64_TPREL16_HI", /* name */
1584 FALSE, /* partial_inplace */
1585 0, /* src_mask */
1586 0xffff, /* dst_mask */
1587 FALSE), /* pcrel_offset */
1588
1589 /* Like TPREL16_HI, but adjust for low 16 bits. */
1590 HOWTO (R_PPC64_TPREL16_HA,
1591 16, /* rightshift */
1592 1, /* size (0 = byte, 1 = short, 2 = long) */
1593 16, /* bitsize */
1594 FALSE, /* pc_relative */
1595 0, /* bitpos */
1596 complain_overflow_signed, /* complain_on_overflow */
1597 ppc64_elf_unhandled_reloc, /* special_function */
1598 "R_PPC64_TPREL16_HA", /* name */
1599 FALSE, /* partial_inplace */
1600 0, /* src_mask */
1601 0xffff, /* dst_mask */
1602 FALSE), /* pcrel_offset */
1603
1604 /* Like TPREL16_HI, but next higher group of 16 bits. */
1605 HOWTO (R_PPC64_TPREL16_HIGHER,
1606 32, /* rightshift */
1607 1, /* size (0 = byte, 1 = short, 2 = long) */
1608 16, /* bitsize */
1609 FALSE, /* pc_relative */
1610 0, /* bitpos */
1611 complain_overflow_dont, /* complain_on_overflow */
1612 ppc64_elf_unhandled_reloc, /* special_function */
1613 "R_PPC64_TPREL16_HIGHER", /* name */
1614 FALSE, /* partial_inplace */
1615 0, /* src_mask */
1616 0xffff, /* dst_mask */
1617 FALSE), /* pcrel_offset */
1618
1619 /* Like TPREL16_HIGHER, but adjust for low 16 bits. */
1620 HOWTO (R_PPC64_TPREL16_HIGHERA,
1621 32, /* rightshift */
1622 1, /* size (0 = byte, 1 = short, 2 = long) */
1623 16, /* bitsize */
1624 FALSE, /* pc_relative */
1625 0, /* bitpos */
1626 complain_overflow_dont, /* complain_on_overflow */
1627 ppc64_elf_unhandled_reloc, /* special_function */
1628 "R_PPC64_TPREL16_HIGHERA", /* name */
1629 FALSE, /* partial_inplace */
1630 0, /* src_mask */
1631 0xffff, /* dst_mask */
1632 FALSE), /* pcrel_offset */
1633
1634 /* Like TPREL16_HIGHER, but next higher group of 16 bits. */
1635 HOWTO (R_PPC64_TPREL16_HIGHEST,
1636 48, /* rightshift */
1637 1, /* size (0 = byte, 1 = short, 2 = long) */
1638 16, /* bitsize */
1639 FALSE, /* pc_relative */
1640 0, /* bitpos */
1641 complain_overflow_dont, /* complain_on_overflow */
1642 ppc64_elf_unhandled_reloc, /* special_function */
1643 "R_PPC64_TPREL16_HIGHEST", /* name */
1644 FALSE, /* partial_inplace */
1645 0, /* src_mask */
1646 0xffff, /* dst_mask */
1647 FALSE), /* pcrel_offset */
1648
1649 /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */
1650 HOWTO (R_PPC64_TPREL16_HIGHESTA,
1651 48, /* rightshift */
1652 1, /* size (0 = byte, 1 = short, 2 = long) */
1653 16, /* bitsize */
1654 FALSE, /* pc_relative */
1655 0, /* bitpos */
1656 complain_overflow_dont, /* complain_on_overflow */
1657 ppc64_elf_unhandled_reloc, /* special_function */
1658 "R_PPC64_TPREL16_HIGHESTA", /* name */
1659 FALSE, /* partial_inplace */
1660 0, /* src_mask */
1661 0xffff, /* dst_mask */
1662 FALSE), /* pcrel_offset */
1663
1664 /* Like TPREL16, but for insns with a DS field. */
1665 HOWTO (R_PPC64_TPREL16_DS,
1666 0, /* rightshift */
1667 1, /* size (0 = byte, 1 = short, 2 = long) */
1668 16, /* bitsize */
1669 FALSE, /* pc_relative */
1670 0, /* bitpos */
1671 complain_overflow_signed, /* complain_on_overflow */
1672 ppc64_elf_unhandled_reloc, /* special_function */
1673 "R_PPC64_TPREL16_DS", /* name */
1674 FALSE, /* partial_inplace */
1675 0, /* src_mask */
1676 0xfffc, /* dst_mask */
1677 FALSE), /* pcrel_offset */
1678
1679 /* Like TPREL16_DS, but no overflow. */
1680 HOWTO (R_PPC64_TPREL16_LO_DS,
1681 0, /* rightshift */
1682 1, /* size (0 = byte, 1 = short, 2 = long) */
1683 16, /* bitsize */
1684 FALSE, /* pc_relative */
1685 0, /* bitpos */
1686 complain_overflow_dont, /* complain_on_overflow */
1687 ppc64_elf_unhandled_reloc, /* special_function */
1688 "R_PPC64_TPREL16_LO_DS", /* name */
1689 FALSE, /* partial_inplace */
1690 0, /* src_mask */
1691 0xfffc, /* dst_mask */
1692 FALSE), /* pcrel_offset */
1693
1694 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1695 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1696 to the first entry relative to the TOC base (r2). */
1697 HOWTO (R_PPC64_GOT_TLSGD16,
1698 0, /* rightshift */
1699 1, /* size (0 = byte, 1 = short, 2 = long) */
1700 16, /* bitsize */
1701 FALSE, /* pc_relative */
1702 0, /* bitpos */
1703 complain_overflow_signed, /* complain_on_overflow */
1704 ppc64_elf_unhandled_reloc, /* special_function */
1705 "R_PPC64_GOT_TLSGD16", /* name */
1706 FALSE, /* partial_inplace */
1707 0, /* src_mask */
1708 0xffff, /* dst_mask */
1709 FALSE), /* pcrel_offset */
1710
1711 /* Like GOT_TLSGD16, but no overflow. */
1712 HOWTO (R_PPC64_GOT_TLSGD16_LO,
1713 0, /* rightshift */
1714 1, /* size (0 = byte, 1 = short, 2 = long) */
1715 16, /* bitsize */
1716 FALSE, /* pc_relative */
1717 0, /* bitpos */
1718 complain_overflow_dont, /* complain_on_overflow */
1719 ppc64_elf_unhandled_reloc, /* special_function */
1720 "R_PPC64_GOT_TLSGD16_LO", /* name */
1721 FALSE, /* partial_inplace */
1722 0, /* src_mask */
1723 0xffff, /* dst_mask */
1724 FALSE), /* pcrel_offset */
1725
1726 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1727 HOWTO (R_PPC64_GOT_TLSGD16_HI,
1728 16, /* rightshift */
1729 1, /* size (0 = byte, 1 = short, 2 = long) */
1730 16, /* bitsize */
1731 FALSE, /* pc_relative */
1732 0, /* bitpos */
1733 complain_overflow_signed, /* complain_on_overflow */
1734 ppc64_elf_unhandled_reloc, /* special_function */
1735 "R_PPC64_GOT_TLSGD16_HI", /* name */
1736 FALSE, /* partial_inplace */
1737 0, /* src_mask */
1738 0xffff, /* dst_mask */
1739 FALSE), /* pcrel_offset */
1740
1741 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1742 HOWTO (R_PPC64_GOT_TLSGD16_HA,
1743 16, /* rightshift */
1744 1, /* size (0 = byte, 1 = short, 2 = long) */
1745 16, /* bitsize */
1746 FALSE, /* pc_relative */
1747 0, /* bitpos */
1748 complain_overflow_signed, /* complain_on_overflow */
1749 ppc64_elf_unhandled_reloc, /* special_function */
1750 "R_PPC64_GOT_TLSGD16_HA", /* name */
1751 FALSE, /* partial_inplace */
1752 0, /* src_mask */
1753 0xffff, /* dst_mask */
1754 FALSE), /* pcrel_offset */
1755
1756 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1757 with values (sym+add)@dtpmod and zero, and computes the offset to the
1758 first entry relative to the TOC base (r2). */
1759 HOWTO (R_PPC64_GOT_TLSLD16,
1760 0, /* rightshift */
1761 1, /* size (0 = byte, 1 = short, 2 = long) */
1762 16, /* bitsize */
1763 FALSE, /* pc_relative */
1764 0, /* bitpos */
1765 complain_overflow_signed, /* complain_on_overflow */
1766 ppc64_elf_unhandled_reloc, /* special_function */
1767 "R_PPC64_GOT_TLSLD16", /* name */
1768 FALSE, /* partial_inplace */
1769 0, /* src_mask */
1770 0xffff, /* dst_mask */
1771 FALSE), /* pcrel_offset */
1772
1773 /* Like GOT_TLSLD16, but no overflow. */
1774 HOWTO (R_PPC64_GOT_TLSLD16_LO,
1775 0, /* rightshift */
1776 1, /* size (0 = byte, 1 = short, 2 = long) */
1777 16, /* bitsize */
1778 FALSE, /* pc_relative */
1779 0, /* bitpos */
1780 complain_overflow_dont, /* complain_on_overflow */
1781 ppc64_elf_unhandled_reloc, /* special_function */
1782 "R_PPC64_GOT_TLSLD16_LO", /* name */
1783 FALSE, /* partial_inplace */
1784 0, /* src_mask */
1785 0xffff, /* dst_mask */
1786 FALSE), /* pcrel_offset */
1787
1788 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1789 HOWTO (R_PPC64_GOT_TLSLD16_HI,
1790 16, /* rightshift */
1791 1, /* size (0 = byte, 1 = short, 2 = long) */
1792 16, /* bitsize */
1793 FALSE, /* pc_relative */
1794 0, /* bitpos */
1795 complain_overflow_signed, /* complain_on_overflow */
1796 ppc64_elf_unhandled_reloc, /* special_function */
1797 "R_PPC64_GOT_TLSLD16_HI", /* name */
1798 FALSE, /* partial_inplace */
1799 0, /* src_mask */
1800 0xffff, /* dst_mask */
1801 FALSE), /* pcrel_offset */
1802
1803 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1804 HOWTO (R_PPC64_GOT_TLSLD16_HA,
1805 16, /* rightshift */
1806 1, /* size (0 = byte, 1 = short, 2 = long) */
1807 16, /* bitsize */
1808 FALSE, /* pc_relative */
1809 0, /* bitpos */
1810 complain_overflow_signed, /* complain_on_overflow */
1811 ppc64_elf_unhandled_reloc, /* special_function */
1812 "R_PPC64_GOT_TLSLD16_HA", /* name */
1813 FALSE, /* partial_inplace */
1814 0, /* src_mask */
1815 0xffff, /* dst_mask */
1816 FALSE), /* pcrel_offset */
1817
1818 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1819 the offset to the entry relative to the TOC base (r2). */
1820 HOWTO (R_PPC64_GOT_DTPREL16_DS,
1821 0, /* rightshift */
1822 1, /* size (0 = byte, 1 = short, 2 = long) */
1823 16, /* bitsize */
1824 FALSE, /* pc_relative */
1825 0, /* bitpos */
1826 complain_overflow_signed, /* complain_on_overflow */
1827 ppc64_elf_unhandled_reloc, /* special_function */
1828 "R_PPC64_GOT_DTPREL16_DS", /* name */
1829 FALSE, /* partial_inplace */
1830 0, /* src_mask */
1831 0xfffc, /* dst_mask */
1832 FALSE), /* pcrel_offset */
1833
1834 /* Like GOT_DTPREL16_DS, but no overflow. */
1835 HOWTO (R_PPC64_GOT_DTPREL16_LO_DS,
1836 0, /* rightshift */
1837 1, /* size (0 = byte, 1 = short, 2 = long) */
1838 16, /* bitsize */
1839 FALSE, /* pc_relative */
1840 0, /* bitpos */
1841 complain_overflow_dont, /* complain_on_overflow */
1842 ppc64_elf_unhandled_reloc, /* special_function */
1843 "R_PPC64_GOT_DTPREL16_LO_DS", /* name */
1844 FALSE, /* partial_inplace */
1845 0, /* src_mask */
1846 0xfffc, /* dst_mask */
1847 FALSE), /* pcrel_offset */
1848
1849 /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */
1850 HOWTO (R_PPC64_GOT_DTPREL16_HI,
1851 16, /* rightshift */
1852 1, /* size (0 = byte, 1 = short, 2 = long) */
1853 16, /* bitsize */
1854 FALSE, /* pc_relative */
1855 0, /* bitpos */
1856 complain_overflow_signed, /* complain_on_overflow */
1857 ppc64_elf_unhandled_reloc, /* special_function */
1858 "R_PPC64_GOT_DTPREL16_HI", /* name */
1859 FALSE, /* partial_inplace */
1860 0, /* src_mask */
1861 0xffff, /* dst_mask */
1862 FALSE), /* pcrel_offset */
1863
1864 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1865 HOWTO (R_PPC64_GOT_DTPREL16_HA,
1866 16, /* rightshift */
1867 1, /* size (0 = byte, 1 = short, 2 = long) */
1868 16, /* bitsize */
1869 FALSE, /* pc_relative */
1870 0, /* bitpos */
1871 complain_overflow_signed, /* complain_on_overflow */
1872 ppc64_elf_unhandled_reloc, /* special_function */
1873 "R_PPC64_GOT_DTPREL16_HA", /* name */
1874 FALSE, /* partial_inplace */
1875 0, /* src_mask */
1876 0xffff, /* dst_mask */
1877 FALSE), /* pcrel_offset */
1878
1879 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1880 offset to the entry relative to the TOC base (r2). */
1881 HOWTO (R_PPC64_GOT_TPREL16_DS,
1882 0, /* rightshift */
1883 1, /* size (0 = byte, 1 = short, 2 = long) */
1884 16, /* bitsize */
1885 FALSE, /* pc_relative */
1886 0, /* bitpos */
1887 complain_overflow_signed, /* complain_on_overflow */
1888 ppc64_elf_unhandled_reloc, /* special_function */
1889 "R_PPC64_GOT_TPREL16_DS", /* name */
1890 FALSE, /* partial_inplace */
1891 0, /* src_mask */
1892 0xfffc, /* dst_mask */
1893 FALSE), /* pcrel_offset */
1894
1895 /* Like GOT_TPREL16_DS, but no overflow. */
1896 HOWTO (R_PPC64_GOT_TPREL16_LO_DS,
1897 0, /* rightshift */
1898 1, /* size (0 = byte, 1 = short, 2 = long) */
1899 16, /* bitsize */
1900 FALSE, /* pc_relative */
1901 0, /* bitpos */
1902 complain_overflow_dont, /* complain_on_overflow */
1903 ppc64_elf_unhandled_reloc, /* special_function */
1904 "R_PPC64_GOT_TPREL16_LO_DS", /* name */
1905 FALSE, /* partial_inplace */
1906 0, /* src_mask */
1907 0xfffc, /* dst_mask */
1908 FALSE), /* pcrel_offset */
1909
1910 /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */
1911 HOWTO (R_PPC64_GOT_TPREL16_HI,
1912 16, /* rightshift */
1913 1, /* size (0 = byte, 1 = short, 2 = long) */
1914 16, /* bitsize */
1915 FALSE, /* pc_relative */
1916 0, /* bitpos */
1917 complain_overflow_signed, /* complain_on_overflow */
1918 ppc64_elf_unhandled_reloc, /* special_function */
1919 "R_PPC64_GOT_TPREL16_HI", /* name */
1920 FALSE, /* partial_inplace */
1921 0, /* src_mask */
1922 0xffff, /* dst_mask */
1923 FALSE), /* pcrel_offset */
1924
1925 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1926 HOWTO (R_PPC64_GOT_TPREL16_HA,
1927 16, /* rightshift */
1928 1, /* size (0 = byte, 1 = short, 2 = long) */
1929 16, /* bitsize */
1930 FALSE, /* pc_relative */
1931 0, /* bitpos */
1932 complain_overflow_signed, /* complain_on_overflow */
1933 ppc64_elf_unhandled_reloc, /* special_function */
1934 "R_PPC64_GOT_TPREL16_HA", /* name */
1935 FALSE, /* partial_inplace */
1936 0, /* src_mask */
1937 0xffff, /* dst_mask */
1938 FALSE), /* pcrel_offset */
1939
1940 HOWTO (R_PPC64_JMP_IREL, /* type */
1941 0, /* rightshift */
1942 0, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1943 0, /* bitsize */
1944 FALSE, /* pc_relative */
1945 0, /* bitpos */
1946 complain_overflow_dont, /* complain_on_overflow */
1947 ppc64_elf_unhandled_reloc, /* special_function */
1948 "R_PPC64_JMP_IREL", /* name */
1949 FALSE, /* partial_inplace */
1950 0, /* src_mask */
1951 0, /* dst_mask */
1952 FALSE), /* pcrel_offset */
1953
1954 HOWTO (R_PPC64_IRELATIVE, /* type */
1955 0, /* rightshift */
1956 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1957 64, /* bitsize */
1958 FALSE, /* pc_relative */
1959 0, /* bitpos */
1960 complain_overflow_dont, /* complain_on_overflow */
1961 bfd_elf_generic_reloc, /* special_function */
1962 "R_PPC64_IRELATIVE", /* name */
1963 FALSE, /* partial_inplace */
1964 0, /* src_mask */
1965 ONES (64), /* dst_mask */
1966 FALSE), /* pcrel_offset */
1967
1968 /* A 16 bit relative relocation. */
1969 HOWTO (R_PPC64_REL16, /* type */
1970 0, /* rightshift */
1971 1, /* size (0 = byte, 1 = short, 2 = long) */
1972 16, /* bitsize */
1973 TRUE, /* pc_relative */
1974 0, /* bitpos */
1975 complain_overflow_signed, /* complain_on_overflow */
1976 bfd_elf_generic_reloc, /* special_function */
1977 "R_PPC64_REL16", /* name */
1978 FALSE, /* partial_inplace */
1979 0, /* src_mask */
1980 0xffff, /* dst_mask */
1981 TRUE), /* pcrel_offset */
1982
1983 /* A 16 bit relative relocation without overflow. */
1984 HOWTO (R_PPC64_REL16_LO, /* type */
1985 0, /* rightshift */
1986 1, /* size (0 = byte, 1 = short, 2 = long) */
1987 16, /* bitsize */
1988 TRUE, /* pc_relative */
1989 0, /* bitpos */
1990 complain_overflow_dont,/* complain_on_overflow */
1991 bfd_elf_generic_reloc, /* special_function */
1992 "R_PPC64_REL16_LO", /* name */
1993 FALSE, /* partial_inplace */
1994 0, /* src_mask */
1995 0xffff, /* dst_mask */
1996 TRUE), /* pcrel_offset */
1997
1998 /* The high order 16 bits of a relative address. */
1999 HOWTO (R_PPC64_REL16_HI, /* type */
2000 16, /* rightshift */
2001 1, /* size (0 = byte, 1 = short, 2 = long) */
2002 16, /* bitsize */
2003 TRUE, /* pc_relative */
2004 0, /* bitpos */
2005 complain_overflow_signed, /* complain_on_overflow */
2006 bfd_elf_generic_reloc, /* special_function */
2007 "R_PPC64_REL16_HI", /* name */
2008 FALSE, /* partial_inplace */
2009 0, /* src_mask */
2010 0xffff, /* dst_mask */
2011 TRUE), /* pcrel_offset */
2012
2013 /* The high order 16 bits of a relative address, plus 1 if the contents of
2014 the low 16 bits, treated as a signed number, is negative. */
2015 HOWTO (R_PPC64_REL16_HA, /* type */
2016 16, /* rightshift */
2017 1, /* size (0 = byte, 1 = short, 2 = long) */
2018 16, /* bitsize */
2019 TRUE, /* pc_relative */
2020 0, /* bitpos */
2021 complain_overflow_signed, /* complain_on_overflow */
2022 ppc64_elf_ha_reloc, /* special_function */
2023 "R_PPC64_REL16_HA", /* name */
2024 FALSE, /* partial_inplace */
2025 0, /* src_mask */
2026 0xffff, /* dst_mask */
2027 TRUE), /* pcrel_offset */
2028
2029 /* Like R_PPC64_REL16_HA but for split field in addpcis. */
2030 HOWTO (R_PPC64_REL16DX_HA, /* type */
2031 16, /* rightshift */
2032 2, /* size (0 = byte, 1 = short, 2 = long) */
2033 16, /* bitsize */
2034 TRUE, /* pc_relative */
2035 0, /* bitpos */
2036 complain_overflow_signed, /* complain_on_overflow */
2037 ppc64_elf_ha_reloc, /* special_function */
2038 "R_PPC64_REL16DX_HA", /* name */
2039 FALSE, /* partial_inplace */
2040 0, /* src_mask */
2041 0x1fffc1, /* dst_mask */
2042 TRUE), /* pcrel_offset */
2043
2044 /* Like R_PPC64_ADDR16_HI, but no overflow. */
2045 HOWTO (R_PPC64_ADDR16_HIGH, /* type */
2046 16, /* rightshift */
2047 1, /* size (0 = byte, 1 = short, 2 = long) */
2048 16, /* bitsize */
2049 FALSE, /* pc_relative */
2050 0, /* bitpos */
2051 complain_overflow_dont, /* complain_on_overflow */
2052 bfd_elf_generic_reloc, /* special_function */
2053 "R_PPC64_ADDR16_HIGH", /* name */
2054 FALSE, /* partial_inplace */
2055 0, /* src_mask */
2056 0xffff, /* dst_mask */
2057 FALSE), /* pcrel_offset */
2058
2059 /* Like R_PPC64_ADDR16_HA, but no overflow. */
2060 HOWTO (R_PPC64_ADDR16_HIGHA, /* type */
2061 16, /* rightshift */
2062 1, /* size (0 = byte, 1 = short, 2 = long) */
2063 16, /* bitsize */
2064 FALSE, /* pc_relative */
2065 0, /* bitpos */
2066 complain_overflow_dont, /* complain_on_overflow */
2067 ppc64_elf_ha_reloc, /* special_function */
2068 "R_PPC64_ADDR16_HIGHA", /* name */
2069 FALSE, /* partial_inplace */
2070 0, /* src_mask */
2071 0xffff, /* dst_mask */
2072 FALSE), /* pcrel_offset */
2073
2074 /* Like R_PPC64_DTPREL16_HI, but no overflow. */
2075 HOWTO (R_PPC64_DTPREL16_HIGH,
2076 16, /* rightshift */
2077 1, /* size (0 = byte, 1 = short, 2 = long) */
2078 16, /* bitsize */
2079 FALSE, /* pc_relative */
2080 0, /* bitpos */
2081 complain_overflow_dont, /* complain_on_overflow */
2082 ppc64_elf_unhandled_reloc, /* special_function */
2083 "R_PPC64_DTPREL16_HIGH", /* name */
2084 FALSE, /* partial_inplace */
2085 0, /* src_mask */
2086 0xffff, /* dst_mask */
2087 FALSE), /* pcrel_offset */
2088
2089 /* Like R_PPC64_DTPREL16_HA, but no overflow. */
2090 HOWTO (R_PPC64_DTPREL16_HIGHA,
2091 16, /* rightshift */
2092 1, /* size (0 = byte, 1 = short, 2 = long) */
2093 16, /* bitsize */
2094 FALSE, /* pc_relative */
2095 0, /* bitpos */
2096 complain_overflow_dont, /* complain_on_overflow */
2097 ppc64_elf_unhandled_reloc, /* special_function */
2098 "R_PPC64_DTPREL16_HIGHA", /* name */
2099 FALSE, /* partial_inplace */
2100 0, /* src_mask */
2101 0xffff, /* dst_mask */
2102 FALSE), /* pcrel_offset */
2103
2104 /* Like R_PPC64_TPREL16_HI, but no overflow. */
2105 HOWTO (R_PPC64_TPREL16_HIGH,
2106 16, /* rightshift */
2107 1, /* size (0 = byte, 1 = short, 2 = long) */
2108 16, /* bitsize */
2109 FALSE, /* pc_relative */
2110 0, /* bitpos */
2111 complain_overflow_dont, /* complain_on_overflow */
2112 ppc64_elf_unhandled_reloc, /* special_function */
2113 "R_PPC64_TPREL16_HIGH", /* name */
2114 FALSE, /* partial_inplace */
2115 0, /* src_mask */
2116 0xffff, /* dst_mask */
2117 FALSE), /* pcrel_offset */
2118
2119 /* Like R_PPC64_TPREL16_HA, but no overflow. */
2120 HOWTO (R_PPC64_TPREL16_HIGHA,
2121 16, /* rightshift */
2122 1, /* size (0 = byte, 1 = short, 2 = long) */
2123 16, /* bitsize */
2124 FALSE, /* pc_relative */
2125 0, /* bitpos */
2126 complain_overflow_dont, /* complain_on_overflow */
2127 ppc64_elf_unhandled_reloc, /* special_function */
2128 "R_PPC64_TPREL16_HIGHA", /* name */
2129 FALSE, /* partial_inplace */
2130 0, /* src_mask */
2131 0xffff, /* dst_mask */
2132 FALSE), /* pcrel_offset */
2133
2134 /* Marker reloc on ELFv2 large-model function entry. */
2135 HOWTO (R_PPC64_ENTRY,
2136 0, /* rightshift */
2137 2, /* size (0 = byte, 1 = short, 2 = long) */
2138 32, /* bitsize */
2139 FALSE, /* pc_relative */
2140 0, /* bitpos */
2141 complain_overflow_dont, /* complain_on_overflow */
2142 bfd_elf_generic_reloc, /* special_function */
2143 "R_PPC64_ENTRY", /* name */
2144 FALSE, /* partial_inplace */
2145 0, /* src_mask */
2146 0, /* dst_mask */
2147 FALSE), /* pcrel_offset */
2148
2149 /* Like ADDR64, but use local entry point of function. */
2150 HOWTO (R_PPC64_ADDR64_LOCAL, /* type */
2151 0, /* rightshift */
2152 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
2153 64, /* bitsize */
2154 FALSE, /* pc_relative */
2155 0, /* bitpos */
2156 complain_overflow_dont, /* complain_on_overflow */
2157 bfd_elf_generic_reloc, /* special_function */
2158 "R_PPC64_ADDR64_LOCAL", /* name */
2159 FALSE, /* partial_inplace */
2160 0, /* src_mask */
2161 ONES (64), /* dst_mask */
2162 FALSE), /* pcrel_offset */
2163
2164 /* GNU extension to record C++ vtable hierarchy. */
2165 HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
2166 0, /* rightshift */
2167 0, /* size (0 = byte, 1 = short, 2 = long) */
2168 0, /* bitsize */
2169 FALSE, /* pc_relative */
2170 0, /* bitpos */
2171 complain_overflow_dont, /* complain_on_overflow */
2172 NULL, /* special_function */
2173 "R_PPC64_GNU_VTINHERIT", /* name */
2174 FALSE, /* partial_inplace */
2175 0, /* src_mask */
2176 0, /* dst_mask */
2177 FALSE), /* pcrel_offset */
2178
2179 /* GNU extension to record C++ vtable member usage. */
2180 HOWTO (R_PPC64_GNU_VTENTRY, /* type */
2181 0, /* rightshift */
2182 0, /* size (0 = byte, 1 = short, 2 = long) */
2183 0, /* bitsize */
2184 FALSE, /* pc_relative */
2185 0, /* bitpos */
2186 complain_overflow_dont, /* complain_on_overflow */
2187 NULL, /* special_function */
2188 "R_PPC64_GNU_VTENTRY", /* name */
2189 FALSE, /* partial_inplace */
2190 0, /* src_mask */
2191 0, /* dst_mask */
2192 FALSE), /* pcrel_offset */
2193 };
2194
2195 \f
2196 /* Initialize the ppc64_elf_howto_table, so that linear accesses can
2197 be done. */
2198
2199 static void
2200 ppc_howto_init (void)
2201 {
2202 unsigned int i, type;
2203
2204 for (i = 0; i < ARRAY_SIZE (ppc64_elf_howto_raw); i++)
2205 {
2206 type = ppc64_elf_howto_raw[i].type;
2207 BFD_ASSERT (type < ARRAY_SIZE (ppc64_elf_howto_table));
2208 ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
2209 }
2210 }
2211
2212 static reloc_howto_type *
2213 ppc64_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2214 bfd_reloc_code_real_type code)
2215 {
2216 enum elf_ppc64_reloc_type r = R_PPC64_NONE;
2217
2218 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2219 /* Initialize howto table if needed. */
2220 ppc_howto_init ();
2221
2222 switch (code)
2223 {
2224 default:
2225 return NULL;
2226
2227 case BFD_RELOC_NONE: r = R_PPC64_NONE;
2228 break;
2229 case BFD_RELOC_32: r = R_PPC64_ADDR32;
2230 break;
2231 case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24;
2232 break;
2233 case BFD_RELOC_16: r = R_PPC64_ADDR16;
2234 break;
2235 case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO;
2236 break;
2237 case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI;
2238 break;
2239 case BFD_RELOC_PPC64_ADDR16_HIGH: r = R_PPC64_ADDR16_HIGH;
2240 break;
2241 case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA;
2242 break;
2243 case BFD_RELOC_PPC64_ADDR16_HIGHA: r = R_PPC64_ADDR16_HIGHA;
2244 break;
2245 case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14;
2246 break;
2247 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN;
2248 break;
2249 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN;
2250 break;
2251 case BFD_RELOC_PPC_B26: r = R_PPC64_REL24;
2252 break;
2253 case BFD_RELOC_PPC_B16: r = R_PPC64_REL14;
2254 break;
2255 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN;
2256 break;
2257 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN;
2258 break;
2259 case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16;
2260 break;
2261 case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO;
2262 break;
2263 case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI;
2264 break;
2265 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA;
2266 break;
2267 case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY;
2268 break;
2269 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT;
2270 break;
2271 case BFD_RELOC_32_PCREL: r = R_PPC64_REL32;
2272 break;
2273 case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32;
2274 break;
2275 case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32;
2276 break;
2277 case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO;
2278 break;
2279 case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI;
2280 break;
2281 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA;
2282 break;
2283 case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF;
2284 break;
2285 case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO;
2286 break;
2287 case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI;
2288 break;
2289 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA;
2290 break;
2291 case BFD_RELOC_CTOR: r = R_PPC64_ADDR64;
2292 break;
2293 case BFD_RELOC_64: r = R_PPC64_ADDR64;
2294 break;
2295 case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER;
2296 break;
2297 case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA;
2298 break;
2299 case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST;
2300 break;
2301 case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA;
2302 break;
2303 case BFD_RELOC_64_PCREL: r = R_PPC64_REL64;
2304 break;
2305 case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64;
2306 break;
2307 case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64;
2308 break;
2309 case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16;
2310 break;
2311 case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO;
2312 break;
2313 case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI;
2314 break;
2315 case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA;
2316 break;
2317 case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC;
2318 break;
2319 case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16;
2320 break;
2321 case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO;
2322 break;
2323 case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI;
2324 break;
2325 case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA;
2326 break;
2327 case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS;
2328 break;
2329 case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS;
2330 break;
2331 case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS;
2332 break;
2333 case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS;
2334 break;
2335 case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS;
2336 break;
2337 case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS;
2338 break;
2339 case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS;
2340 break;
2341 case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS;
2342 break;
2343 case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS;
2344 break;
2345 case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS;
2346 break;
2347 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS;
2348 break;
2349 case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS;
2350 break;
2351 case BFD_RELOC_PPC_TLSGD: r = R_PPC64_TLSGD;
2352 break;
2353 case BFD_RELOC_PPC_TLSLD: r = R_PPC64_TLSLD;
2354 break;
2355 case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64;
2356 break;
2357 case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16;
2358 break;
2359 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO;
2360 break;
2361 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI;
2362 break;
2363 case BFD_RELOC_PPC64_TPREL16_HIGH: r = R_PPC64_TPREL16_HIGH;
2364 break;
2365 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA;
2366 break;
2367 case BFD_RELOC_PPC64_TPREL16_HIGHA: r = R_PPC64_TPREL16_HIGHA;
2368 break;
2369 case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64;
2370 break;
2371 case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16;
2372 break;
2373 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO;
2374 break;
2375 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI;
2376 break;
2377 case BFD_RELOC_PPC64_DTPREL16_HIGH: r = R_PPC64_DTPREL16_HIGH;
2378 break;
2379 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA;
2380 break;
2381 case BFD_RELOC_PPC64_DTPREL16_HIGHA: r = R_PPC64_DTPREL16_HIGHA;
2382 break;
2383 case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64;
2384 break;
2385 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16;
2386 break;
2387 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO;
2388 break;
2389 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI;
2390 break;
2391 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA;
2392 break;
2393 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16;
2394 break;
2395 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO;
2396 break;
2397 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI;
2398 break;
2399 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA;
2400 break;
2401 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS;
2402 break;
2403 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS;
2404 break;
2405 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI;
2406 break;
2407 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA;
2408 break;
2409 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS;
2410 break;
2411 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS;
2412 break;
2413 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI;
2414 break;
2415 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA;
2416 break;
2417 case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS;
2418 break;
2419 case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS;
2420 break;
2421 case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER;
2422 break;
2423 case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA;
2424 break;
2425 case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST;
2426 break;
2427 case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA;
2428 break;
2429 case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS;
2430 break;
2431 case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS;
2432 break;
2433 case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER;
2434 break;
2435 case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA;
2436 break;
2437 case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST;
2438 break;
2439 case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA;
2440 break;
2441 case BFD_RELOC_16_PCREL: r = R_PPC64_REL16;
2442 break;
2443 case BFD_RELOC_LO16_PCREL: r = R_PPC64_REL16_LO;
2444 break;
2445 case BFD_RELOC_HI16_PCREL: r = R_PPC64_REL16_HI;
2446 break;
2447 case BFD_RELOC_HI16_S_PCREL: r = R_PPC64_REL16_HA;
2448 break;
2449 case BFD_RELOC_PPC_REL16DX_HA: r = R_PPC64_REL16DX_HA;
2450 break;
2451 case BFD_RELOC_PPC64_ENTRY: r = R_PPC64_ENTRY;
2452 break;
2453 case BFD_RELOC_PPC64_ADDR64_LOCAL: r = R_PPC64_ADDR64_LOCAL;
2454 break;
2455 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT;
2456 break;
2457 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY;
2458 break;
2459 }
2460
2461 return ppc64_elf_howto_table[r];
2462 };
2463
2464 static reloc_howto_type *
2465 ppc64_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2466 const char *r_name)
2467 {
2468 unsigned int i;
2469
2470 for (i = 0; i < ARRAY_SIZE (ppc64_elf_howto_raw); i++)
2471 if (ppc64_elf_howto_raw[i].name != NULL
2472 && strcasecmp (ppc64_elf_howto_raw[i].name, r_name) == 0)
2473 return &ppc64_elf_howto_raw[i];
2474
2475 return NULL;
2476 }
2477
2478 /* Set the howto pointer for a PowerPC ELF reloc. */
2479
2480 static void
2481 ppc64_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
2482 Elf_Internal_Rela *dst)
2483 {
2484 unsigned int type;
2485
2486 /* Initialize howto table if needed. */
2487 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2488 ppc_howto_init ();
2489
2490 type = ELF64_R_TYPE (dst->r_info);
2491 if (type >= ARRAY_SIZE (ppc64_elf_howto_table))
2492 {
2493 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
2494 abfd, (int) type);
2495 type = R_PPC64_NONE;
2496 }
2497 cache_ptr->howto = ppc64_elf_howto_table[type];
2498 }
2499
2500 /* Handle the R_PPC64_ADDR16_HA and similar relocs. */
2501
2502 static bfd_reloc_status_type
2503 ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2504 void *data, asection *input_section,
2505 bfd *output_bfd, char **error_message)
2506 {
2507 enum elf_ppc64_reloc_type r_type;
2508 long insn;
2509 bfd_size_type octets;
2510 bfd_vma value;
2511
2512 /* If this is a relocatable link (output_bfd test tells us), just
2513 call the generic function. Any adjustment will be done at final
2514 link time. */
2515 if (output_bfd != NULL)
2516 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2517 input_section, output_bfd, error_message);
2518
2519 /* Adjust the addend for sign extension of the low 16 bits.
2520 We won't actually be using the low 16 bits, so trashing them
2521 doesn't matter. */
2522 reloc_entry->addend += 0x8000;
2523 r_type = reloc_entry->howto->type;
2524 if (r_type != R_PPC64_REL16DX_HA)
2525 return bfd_reloc_continue;
2526
2527 value = 0;
2528 if (!bfd_is_com_section (symbol->section))
2529 value = symbol->value;
2530 value += (reloc_entry->addend
2531 + symbol->section->output_offset
2532 + symbol->section->output_section->vma);
2533 value -= (reloc_entry->address
2534 + input_section->output_offset
2535 + input_section->output_section->vma);
2536 value = (bfd_signed_vma) value >> 16;
2537
2538 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2539 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2540 insn &= ~0x1fffc1;
2541 insn |= (value & 0xffc1) | ((value & 0x3e) << 15);
2542 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2543 if (value + 0x8000 > 0xffff)
2544 return bfd_reloc_overflow;
2545 return bfd_reloc_ok;
2546 }
2547
2548 static bfd_reloc_status_type
2549 ppc64_elf_branch_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2550 void *data, asection *input_section,
2551 bfd *output_bfd, char **error_message)
2552 {
2553 if (output_bfd != NULL)
2554 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2555 input_section, output_bfd, error_message);
2556
2557 if (strcmp (symbol->section->name, ".opd") == 0
2558 && (symbol->section->owner->flags & DYNAMIC) == 0)
2559 {
2560 bfd_vma dest = opd_entry_value (symbol->section,
2561 symbol->value + reloc_entry->addend,
2562 NULL, NULL, FALSE);
2563 if (dest != (bfd_vma) -1)
2564 reloc_entry->addend = dest - (symbol->value
2565 + symbol->section->output_section->vma
2566 + symbol->section->output_offset);
2567 }
2568 else
2569 {
2570 elf_symbol_type *elfsym = (elf_symbol_type *) symbol;
2571
2572 if (symbol->section->owner != abfd
2573 && abiversion (symbol->section->owner) >= 2)
2574 {
2575 unsigned int i;
2576
2577 for (i = 0; i < symbol->section->owner->symcount; ++i)
2578 {
2579 asymbol *symdef = symbol->section->owner->outsymbols[i];
2580
2581 if (strcmp (symdef->name, symbol->name) == 0)
2582 {
2583 elfsym = (elf_symbol_type *) symdef;
2584 break;
2585 }
2586 }
2587 }
2588 reloc_entry->addend
2589 += PPC64_LOCAL_ENTRY_OFFSET (elfsym->internal_elf_sym.st_other);
2590 }
2591 return bfd_reloc_continue;
2592 }
2593
2594 static bfd_reloc_status_type
2595 ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2596 void *data, asection *input_section,
2597 bfd *output_bfd, char **error_message)
2598 {
2599 long insn;
2600 enum elf_ppc64_reloc_type r_type;
2601 bfd_size_type octets;
2602 /* Assume 'at' branch hints. */
2603 bfd_boolean is_isa_v2 = TRUE;
2604
2605 /* If this is a relocatable link (output_bfd test tells us), just
2606 call the generic function. Any adjustment will be done at final
2607 link time. */
2608 if (output_bfd != NULL)
2609 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2610 input_section, output_bfd, error_message);
2611
2612 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2613 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2614 insn &= ~(0x01 << 21);
2615 r_type = reloc_entry->howto->type;
2616 if (r_type == R_PPC64_ADDR14_BRTAKEN
2617 || r_type == R_PPC64_REL14_BRTAKEN)
2618 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
2619
2620 if (is_isa_v2)
2621 {
2622 /* Set 'a' bit. This is 0b00010 in BO field for branch
2623 on CR(BI) insns (BO == 001at or 011at), and 0b01000
2624 for branch on CTR insns (BO == 1a00t or 1a01t). */
2625 if ((insn & (0x14 << 21)) == (0x04 << 21))
2626 insn |= 0x02 << 21;
2627 else if ((insn & (0x14 << 21)) == (0x10 << 21))
2628 insn |= 0x08 << 21;
2629 else
2630 goto out;
2631 }
2632 else
2633 {
2634 bfd_vma target = 0;
2635 bfd_vma from;
2636
2637 if (!bfd_is_com_section (symbol->section))
2638 target = symbol->value;
2639 target += symbol->section->output_section->vma;
2640 target += symbol->section->output_offset;
2641 target += reloc_entry->addend;
2642
2643 from = (reloc_entry->address
2644 + input_section->output_offset
2645 + input_section->output_section->vma);
2646
2647 /* Invert 'y' bit if not the default. */
2648 if ((bfd_signed_vma) (target - from) < 0)
2649 insn ^= 0x01 << 21;
2650 }
2651 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2652 out:
2653 return ppc64_elf_branch_reloc (abfd, reloc_entry, symbol, data,
2654 input_section, output_bfd, error_message);
2655 }
2656
2657 static bfd_reloc_status_type
2658 ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2659 void *data, asection *input_section,
2660 bfd *output_bfd, char **error_message)
2661 {
2662 /* If this is a relocatable link (output_bfd test tells us), just
2663 call the generic function. Any adjustment will be done at final
2664 link time. */
2665 if (output_bfd != NULL)
2666 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2667 input_section, output_bfd, error_message);
2668
2669 /* Subtract the symbol section base address. */
2670 reloc_entry->addend -= symbol->section->output_section->vma;
2671 return bfd_reloc_continue;
2672 }
2673
2674 static bfd_reloc_status_type
2675 ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2676 void *data, asection *input_section,
2677 bfd *output_bfd, char **error_message)
2678 {
2679 /* If this is a relocatable link (output_bfd test tells us), just
2680 call the generic function. Any adjustment will be done at final
2681 link time. */
2682 if (output_bfd != NULL)
2683 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2684 input_section, output_bfd, error_message);
2685
2686 /* Subtract the symbol section base address. */
2687 reloc_entry->addend -= symbol->section->output_section->vma;
2688
2689 /* Adjust the addend for sign extension of the low 16 bits. */
2690 reloc_entry->addend += 0x8000;
2691 return bfd_reloc_continue;
2692 }
2693
2694 static bfd_reloc_status_type
2695 ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2696 void *data, asection *input_section,
2697 bfd *output_bfd, char **error_message)
2698 {
2699 bfd_vma TOCstart;
2700
2701 /* If this is a relocatable link (output_bfd test tells us), just
2702 call the generic function. Any adjustment will be done at final
2703 link time. */
2704 if (output_bfd != NULL)
2705 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2706 input_section, output_bfd, error_message);
2707
2708 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2709 if (TOCstart == 0)
2710 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2711
2712 /* Subtract the TOC base address. */
2713 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2714 return bfd_reloc_continue;
2715 }
2716
2717 static bfd_reloc_status_type
2718 ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2719 void *data, asection *input_section,
2720 bfd *output_bfd, char **error_message)
2721 {
2722 bfd_vma TOCstart;
2723
2724 /* If this is a relocatable link (output_bfd test tells us), just
2725 call the generic function. Any adjustment will be done at final
2726 link time. */
2727 if (output_bfd != NULL)
2728 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2729 input_section, output_bfd, error_message);
2730
2731 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2732 if (TOCstart == 0)
2733 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2734
2735 /* Subtract the TOC base address. */
2736 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2737
2738 /* Adjust the addend for sign extension of the low 16 bits. */
2739 reloc_entry->addend += 0x8000;
2740 return bfd_reloc_continue;
2741 }
2742
2743 static bfd_reloc_status_type
2744 ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2745 void *data, asection *input_section,
2746 bfd *output_bfd, char **error_message)
2747 {
2748 bfd_vma TOCstart;
2749 bfd_size_type octets;
2750
2751 /* If this is a relocatable link (output_bfd test tells us), just
2752 call the generic function. Any adjustment will be done at final
2753 link time. */
2754 if (output_bfd != NULL)
2755 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2756 input_section, output_bfd, error_message);
2757
2758 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2759 if (TOCstart == 0)
2760 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2761
2762 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2763 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
2764 return bfd_reloc_ok;
2765 }
2766
2767 static bfd_reloc_status_type
2768 ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2769 void *data, asection *input_section,
2770 bfd *output_bfd, char **error_message)
2771 {
2772 /* If this is a relocatable link (output_bfd test tells us), just
2773 call the generic function. Any adjustment will be done at final
2774 link time. */
2775 if (output_bfd != NULL)
2776 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2777 input_section, output_bfd, error_message);
2778
2779 if (error_message != NULL)
2780 {
2781 static char buf[60];
2782 sprintf (buf, "generic linker can't handle %s",
2783 reloc_entry->howto->name);
2784 *error_message = buf;
2785 }
2786 return bfd_reloc_dangerous;
2787 }
2788
2789 /* Track GOT entries needed for a given symbol. We might need more
2790 than one got entry per symbol. */
2791 struct got_entry
2792 {
2793 struct got_entry *next;
2794
2795 /* The symbol addend that we'll be placing in the GOT. */
2796 bfd_vma addend;
2797
2798 /* Unlike other ELF targets, we use separate GOT entries for the same
2799 symbol referenced from different input files. This is to support
2800 automatic multiple TOC/GOT sections, where the TOC base can vary
2801 from one input file to another. After partitioning into TOC groups
2802 we merge entries within the group.
2803
2804 Point to the BFD owning this GOT entry. */
2805 bfd *owner;
2806
2807 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
2808 TLS_TPREL or TLS_DTPREL for tls entries. */
2809 unsigned char tls_type;
2810
2811 /* Non-zero if got.ent points to real entry. */
2812 unsigned char is_indirect;
2813
2814 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
2815 union
2816 {
2817 bfd_signed_vma refcount;
2818 bfd_vma offset;
2819 struct got_entry *ent;
2820 } got;
2821 };
2822
2823 /* The same for PLT. */
2824 struct plt_entry
2825 {
2826 struct plt_entry *next;
2827
2828 bfd_vma addend;
2829
2830 union
2831 {
2832 bfd_signed_vma refcount;
2833 bfd_vma offset;
2834 } plt;
2835 };
2836
2837 struct ppc64_elf_obj_tdata
2838 {
2839 struct elf_obj_tdata elf;
2840
2841 /* Shortcuts to dynamic linker sections. */
2842 asection *got;
2843 asection *relgot;
2844
2845 /* Used during garbage collection. We attach global symbols defined
2846 on removed .opd entries to this section so that the sym is removed. */
2847 asection *deleted_section;
2848
2849 /* TLS local dynamic got entry handling. Support for multiple GOT
2850 sections means we potentially need one of these for each input bfd. */
2851 struct got_entry tlsld_got;
2852
2853 union {
2854 /* A copy of relocs before they are modified for --emit-relocs. */
2855 Elf_Internal_Rela *relocs;
2856
2857 /* Section contents. */
2858 bfd_byte *contents;
2859 } opd;
2860
2861 /* Nonzero if this bfd has small toc/got relocs, ie. that expect
2862 the reloc to be in the range -32768 to 32767. */
2863 unsigned int has_small_toc_reloc : 1;
2864
2865 /* Set if toc/got ha relocs detected not using r2, or lo reloc
2866 instruction not one we handle. */
2867 unsigned int unexpected_toc_insn : 1;
2868 };
2869
2870 #define ppc64_elf_tdata(bfd) \
2871 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
2872
2873 #define ppc64_tlsld_got(bfd) \
2874 (&ppc64_elf_tdata (bfd)->tlsld_got)
2875
2876 #define is_ppc64_elf(bfd) \
2877 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2878 && elf_object_id (bfd) == PPC64_ELF_DATA)
2879
2880 /* Override the generic function because we store some extras. */
2881
2882 static bfd_boolean
2883 ppc64_elf_mkobject (bfd *abfd)
2884 {
2885 return bfd_elf_allocate_object (abfd, sizeof (struct ppc64_elf_obj_tdata),
2886 PPC64_ELF_DATA);
2887 }
2888
2889 /* Fix bad default arch selected for a 64 bit input bfd when the
2890 default is 32 bit. */
2891
2892 static bfd_boolean
2893 ppc64_elf_object_p (bfd *abfd)
2894 {
2895 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 32)
2896 {
2897 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2898
2899 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2900 {
2901 /* Relies on arch after 32 bit default being 64 bit default. */
2902 abfd->arch_info = abfd->arch_info->next;
2903 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2904 }
2905 }
2906 return TRUE;
2907 }
2908
2909 /* Support for core dump NOTE sections. */
2910
2911 static bfd_boolean
2912 ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2913 {
2914 size_t offset, size;
2915
2916 if (note->descsz != 504)
2917 return FALSE;
2918
2919 /* pr_cursig */
2920 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
2921
2922 /* pr_pid */
2923 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 32);
2924
2925 /* pr_reg */
2926 offset = 112;
2927 size = 384;
2928
2929 /* Make a ".reg/999" section. */
2930 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2931 size, note->descpos + offset);
2932 }
2933
2934 static bfd_boolean
2935 ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2936 {
2937 if (note->descsz != 136)
2938 return FALSE;
2939
2940 elf_tdata (abfd)->core->pid
2941 = bfd_get_32 (abfd, note->descdata + 24);
2942 elf_tdata (abfd)->core->program
2943 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
2944 elf_tdata (abfd)->core->command
2945 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
2946
2947 return TRUE;
2948 }
2949
2950 static char *
2951 ppc64_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type,
2952 ...)
2953 {
2954 switch (note_type)
2955 {
2956 default:
2957 return NULL;
2958
2959 case NT_PRPSINFO:
2960 {
2961 char data[136];
2962 va_list ap;
2963
2964 va_start (ap, note_type);
2965 memset (data, 0, sizeof (data));
2966 strncpy (data + 40, va_arg (ap, const char *), 16);
2967 strncpy (data + 56, va_arg (ap, const char *), 80);
2968 va_end (ap);
2969 return elfcore_write_note (abfd, buf, bufsiz,
2970 "CORE", note_type, data, sizeof (data));
2971 }
2972
2973 case NT_PRSTATUS:
2974 {
2975 char data[504];
2976 va_list ap;
2977 long pid;
2978 int cursig;
2979 const void *greg;
2980
2981 va_start (ap, note_type);
2982 memset (data, 0, 112);
2983 pid = va_arg (ap, long);
2984 bfd_put_32 (abfd, pid, data + 32);
2985 cursig = va_arg (ap, int);
2986 bfd_put_16 (abfd, cursig, data + 12);
2987 greg = va_arg (ap, const void *);
2988 memcpy (data + 112, greg, 384);
2989 memset (data + 496, 0, 8);
2990 va_end (ap);
2991 return elfcore_write_note (abfd, buf, bufsiz,
2992 "CORE", note_type, data, sizeof (data));
2993 }
2994 }
2995 }
2996
2997 /* Add extra PPC sections. */
2998
2999 static const struct bfd_elf_special_section ppc64_elf_special_sections[]=
3000 {
3001 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, 0 },
3002 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
3003 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
3004 { STRING_COMMA_LEN (".toc"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
3005 { STRING_COMMA_LEN (".toc1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
3006 { STRING_COMMA_LEN (".tocbss"), 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
3007 { NULL, 0, 0, 0, 0 }
3008 };
3009
3010 enum _ppc64_sec_type {
3011 sec_normal = 0,
3012 sec_opd = 1,
3013 sec_toc = 2
3014 };
3015
3016 struct _ppc64_elf_section_data
3017 {
3018 struct bfd_elf_section_data elf;
3019
3020 union
3021 {
3022 /* An array with one entry for each opd function descriptor,
3023 and some spares since opd entries may be either 16 or 24 bytes. */
3024 #define OPD_NDX(OFF) ((OFF) >> 4)
3025 struct _opd_sec_data
3026 {
3027 /* Points to the function code section for local opd entries. */
3028 asection **func_sec;
3029
3030 /* After editing .opd, adjust references to opd local syms. */
3031 long *adjust;
3032 } opd;
3033
3034 /* An array for toc sections, indexed by offset/8. */
3035 struct _toc_sec_data
3036 {
3037 /* Specifies the relocation symbol index used at a given toc offset. */
3038 unsigned *symndx;
3039
3040 /* And the relocation addend. */
3041 bfd_vma *add;
3042 } toc;
3043 } u;
3044
3045 enum _ppc64_sec_type sec_type:2;
3046
3047 /* Flag set when small branches are detected. Used to
3048 select suitable defaults for the stub group size. */
3049 unsigned int has_14bit_branch:1;
3050 };
3051
3052 #define ppc64_elf_section_data(sec) \
3053 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
3054
3055 static bfd_boolean
3056 ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
3057 {
3058 if (!sec->used_by_bfd)
3059 {
3060 struct _ppc64_elf_section_data *sdata;
3061 bfd_size_type amt = sizeof (*sdata);
3062
3063 sdata = bfd_zalloc (abfd, amt);
3064 if (sdata == NULL)
3065 return FALSE;
3066 sec->used_by_bfd = sdata;
3067 }
3068
3069 return _bfd_elf_new_section_hook (abfd, sec);
3070 }
3071
3072 static struct _opd_sec_data *
3073 get_opd_info (asection * sec)
3074 {
3075 if (sec != NULL
3076 && ppc64_elf_section_data (sec) != NULL
3077 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
3078 return &ppc64_elf_section_data (sec)->u.opd;
3079 return NULL;
3080 }
3081 \f
3082 /* Parameters for the qsort hook. */
3083 static bfd_boolean synthetic_relocatable;
3084
3085 /* qsort comparison function for ppc64_elf_get_synthetic_symtab. */
3086
3087 static int
3088 compare_symbols (const void *ap, const void *bp)
3089 {
3090 const asymbol *a = * (const asymbol **) ap;
3091 const asymbol *b = * (const asymbol **) bp;
3092
3093 /* Section symbols first. */
3094 if ((a->flags & BSF_SECTION_SYM) && !(b->flags & BSF_SECTION_SYM))
3095 return -1;
3096 if (!(a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM))
3097 return 1;
3098
3099 /* then .opd symbols. */
3100 if (strcmp (a->section->name, ".opd") == 0
3101 && strcmp (b->section->name, ".opd") != 0)
3102 return -1;
3103 if (strcmp (a->section->name, ".opd") != 0
3104 && strcmp (b->section->name, ".opd") == 0)
3105 return 1;
3106
3107 /* then other code symbols. */
3108 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3109 == (SEC_CODE | SEC_ALLOC)
3110 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3111 != (SEC_CODE | SEC_ALLOC))
3112 return -1;
3113
3114 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3115 != (SEC_CODE | SEC_ALLOC)
3116 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3117 == (SEC_CODE | SEC_ALLOC))
3118 return 1;
3119
3120 if (synthetic_relocatable)
3121 {
3122 if (a->section->id < b->section->id)
3123 return -1;
3124
3125 if (a->section->id > b->section->id)
3126 return 1;
3127 }
3128
3129 if (a->value + a->section->vma < b->value + b->section->vma)
3130 return -1;
3131
3132 if (a->value + a->section->vma > b->value + b->section->vma)
3133 return 1;
3134
3135 /* For syms with the same value, prefer strong dynamic global function
3136 syms over other syms. */
3137 if ((a->flags & BSF_GLOBAL) != 0 && (b->flags & BSF_GLOBAL) == 0)
3138 return -1;
3139
3140 if ((a->flags & BSF_GLOBAL) == 0 && (b->flags & BSF_GLOBAL) != 0)
3141 return 1;
3142
3143 if ((a->flags & BSF_FUNCTION) != 0 && (b->flags & BSF_FUNCTION) == 0)
3144 return -1;
3145
3146 if ((a->flags & BSF_FUNCTION) == 0 && (b->flags & BSF_FUNCTION) != 0)
3147 return 1;
3148
3149 if ((a->flags & BSF_WEAK) == 0 && (b->flags & BSF_WEAK) != 0)
3150 return -1;
3151
3152 if ((a->flags & BSF_WEAK) != 0 && (b->flags & BSF_WEAK) == 0)
3153 return 1;
3154
3155 if ((a->flags & BSF_DYNAMIC) != 0 && (b->flags & BSF_DYNAMIC) == 0)
3156 return -1;
3157
3158 if ((a->flags & BSF_DYNAMIC) == 0 && (b->flags & BSF_DYNAMIC) != 0)
3159 return 1;
3160
3161 return 0;
3162 }
3163
3164 /* Search SYMS for a symbol of the given VALUE. */
3165
3166 static asymbol *
3167 sym_exists_at (asymbol **syms, long lo, long hi, unsigned int id, bfd_vma value)
3168 {
3169 long mid;
3170
3171 if (id == (unsigned) -1)
3172 {
3173 while (lo < hi)
3174 {
3175 mid = (lo + hi) >> 1;
3176 if (syms[mid]->value + syms[mid]->section->vma < value)
3177 lo = mid + 1;
3178 else if (syms[mid]->value + syms[mid]->section->vma > value)
3179 hi = mid;
3180 else
3181 return syms[mid];
3182 }
3183 }
3184 else
3185 {
3186 while (lo < hi)
3187 {
3188 mid = (lo + hi) >> 1;
3189 if (syms[mid]->section->id < id)
3190 lo = mid + 1;
3191 else if (syms[mid]->section->id > id)
3192 hi = mid;
3193 else if (syms[mid]->value < value)
3194 lo = mid + 1;
3195 else if (syms[mid]->value > value)
3196 hi = mid;
3197 else
3198 return syms[mid];
3199 }
3200 }
3201 return NULL;
3202 }
3203
3204 static bfd_boolean
3205 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
3206 {
3207 bfd_vma vma = *(bfd_vma *) ptr;
3208 return ((section->flags & SEC_ALLOC) != 0
3209 && section->vma <= vma
3210 && vma < section->vma + section->size);
3211 }
3212
3213 /* Create synthetic symbols, effectively restoring "dot-symbol" function
3214 entry syms. Also generate @plt symbols for the glink branch table.
3215 Returns count of synthetic symbols in RET or -1 on error. */
3216
3217 static long
3218 ppc64_elf_get_synthetic_symtab (bfd *abfd,
3219 long static_count, asymbol **static_syms,
3220 long dyn_count, asymbol **dyn_syms,
3221 asymbol **ret)
3222 {
3223 asymbol *s;
3224 long i;
3225 long count;
3226 char *names;
3227 long symcount, codesecsym, codesecsymend, secsymend, opdsymend;
3228 asection *opd = NULL;
3229 bfd_boolean relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0;
3230 asymbol **syms;
3231 int abi = abiversion (abfd);
3232
3233 *ret = NULL;
3234
3235 if (abi < 2)
3236 {
3237 opd = bfd_get_section_by_name (abfd, ".opd");
3238 if (opd == NULL && abi == 1)
3239 return 0;
3240 }
3241
3242 symcount = static_count;
3243 if (!relocatable)
3244 symcount += dyn_count;
3245 if (symcount == 0)
3246 return 0;
3247
3248 syms = bfd_malloc ((symcount + 1) * sizeof (*syms));
3249 if (syms == NULL)
3250 return -1;
3251
3252 if (!relocatable && static_count != 0 && dyn_count != 0)
3253 {
3254 /* Use both symbol tables. */
3255 memcpy (syms, static_syms, static_count * sizeof (*syms));
3256 memcpy (syms + static_count, dyn_syms, (dyn_count + 1) * sizeof (*syms));
3257 }
3258 else if (!relocatable && static_count == 0)
3259 memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms));
3260 else
3261 memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms));
3262
3263 synthetic_relocatable = relocatable;
3264 qsort (syms, symcount, sizeof (*syms), compare_symbols);
3265
3266 if (!relocatable && symcount > 1)
3267 {
3268 long j;
3269 /* Trim duplicate syms, since we may have merged the normal and
3270 dynamic symbols. Actually, we only care about syms that have
3271 different values, so trim any with the same value. */
3272 for (i = 1, j = 1; i < symcount; ++i)
3273 if (syms[i - 1]->value + syms[i - 1]->section->vma
3274 != syms[i]->value + syms[i]->section->vma)
3275 syms[j++] = syms[i];
3276 symcount = j;
3277 }
3278
3279 i = 0;
3280 if (strcmp (syms[i]->section->name, ".opd") == 0)
3281 ++i;
3282 codesecsym = i;
3283
3284 for (; i < symcount; ++i)
3285 if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3286 != (SEC_CODE | SEC_ALLOC))
3287 || (syms[i]->flags & BSF_SECTION_SYM) == 0)
3288 break;
3289 codesecsymend = i;
3290
3291 for (; i < symcount; ++i)
3292 if ((syms[i]->flags & BSF_SECTION_SYM) == 0)
3293 break;
3294 secsymend = i;
3295
3296 for (; i < symcount; ++i)
3297 if (strcmp (syms[i]->section->name, ".opd") != 0)
3298 break;
3299 opdsymend = i;
3300
3301 for (; i < symcount; ++i)
3302 if ((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3303 != (SEC_CODE | SEC_ALLOC))
3304 break;
3305 symcount = i;
3306
3307 count = 0;
3308
3309 if (relocatable)
3310 {
3311 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3312 arelent *r;
3313 size_t size;
3314 long relcount;
3315
3316 if (opdsymend == secsymend)
3317 goto done;
3318
3319 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3320 relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0;
3321 if (relcount == 0)
3322 goto done;
3323
3324 if (!(*slurp_relocs) (abfd, opd, static_syms, FALSE))
3325 {
3326 count = -1;
3327 goto done;
3328 }
3329
3330 size = 0;
3331 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3332 {
3333 asymbol *sym;
3334
3335 while (r < opd->relocation + relcount
3336 && r->address < syms[i]->value + opd->vma)
3337 ++r;
3338
3339 if (r == opd->relocation + relcount)
3340 break;
3341
3342 if (r->address != syms[i]->value + opd->vma)
3343 continue;
3344
3345 if (r->howto->type != R_PPC64_ADDR64)
3346 continue;
3347
3348 sym = *r->sym_ptr_ptr;
3349 if (!sym_exists_at (syms, opdsymend, symcount,
3350 sym->section->id, sym->value + r->addend))
3351 {
3352 ++count;
3353 size += sizeof (asymbol);
3354 size += strlen (syms[i]->name) + 2;
3355 }
3356 }
3357
3358 if (size == 0)
3359 goto done;
3360 s = *ret = bfd_malloc (size);
3361 if (s == NULL)
3362 {
3363 count = -1;
3364 goto done;
3365 }
3366
3367 names = (char *) (s + count);
3368
3369 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3370 {
3371 asymbol *sym;
3372
3373 while (r < opd->relocation + relcount
3374 && r->address < syms[i]->value + opd->vma)
3375 ++r;
3376
3377 if (r == opd->relocation + relcount)
3378 break;
3379
3380 if (r->address != syms[i]->value + opd->vma)
3381 continue;
3382
3383 if (r->howto->type != R_PPC64_ADDR64)
3384 continue;
3385
3386 sym = *r->sym_ptr_ptr;
3387 if (!sym_exists_at (syms, opdsymend, symcount,
3388 sym->section->id, sym->value + r->addend))
3389 {
3390 size_t len;
3391
3392 *s = *syms[i];
3393 s->flags |= BSF_SYNTHETIC;
3394 s->section = sym->section;
3395 s->value = sym->value + r->addend;
3396 s->name = names;
3397 *names++ = '.';
3398 len = strlen (syms[i]->name);
3399 memcpy (names, syms[i]->name, len + 1);
3400 names += len + 1;
3401 /* Have udata.p point back to the original symbol this
3402 synthetic symbol was derived from. */
3403 s->udata.p = syms[i];
3404 s++;
3405 }
3406 }
3407 }
3408 else
3409 {
3410 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3411 bfd_byte *contents = NULL;
3412 size_t size;
3413 long plt_count = 0;
3414 bfd_vma glink_vma = 0, resolv_vma = 0;
3415 asection *dynamic, *glink = NULL, *relplt = NULL;
3416 arelent *p;
3417
3418 if (opd != NULL && !bfd_malloc_and_get_section (abfd, opd, &contents))
3419 {
3420 free_contents_and_exit_err:
3421 count = -1;
3422 free_contents_and_exit:
3423 if (contents)
3424 free (contents);
3425 goto done;
3426 }
3427
3428 size = 0;
3429 for (i = secsymend; i < opdsymend; ++i)
3430 {
3431 bfd_vma ent;
3432
3433 /* Ignore bogus symbols. */
3434 if (syms[i]->value > opd->size - 8)
3435 continue;
3436
3437 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3438 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3439 {
3440 ++count;
3441 size += sizeof (asymbol);
3442 size += strlen (syms[i]->name) + 2;
3443 }
3444 }
3445
3446 /* Get start of .glink stubs from DT_PPC64_GLINK. */
3447 if (dyn_count != 0
3448 && (dynamic = bfd_get_section_by_name (abfd, ".dynamic")) != NULL)
3449 {
3450 bfd_byte *dynbuf, *extdyn, *extdynend;
3451 size_t extdynsize;
3452 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
3453
3454 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
3455 goto free_contents_and_exit_err;
3456
3457 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
3458 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
3459
3460 extdyn = dynbuf;
3461 extdynend = extdyn + dynamic->size;
3462 for (; extdyn < extdynend; extdyn += extdynsize)
3463 {
3464 Elf_Internal_Dyn dyn;
3465 (*swap_dyn_in) (abfd, extdyn, &dyn);
3466
3467 if (dyn.d_tag == DT_NULL)
3468 break;
3469
3470 if (dyn.d_tag == DT_PPC64_GLINK)
3471 {
3472 /* The first glink stub starts at offset 32; see
3473 comment in ppc64_elf_finish_dynamic_sections. */
3474 glink_vma = dyn.d_un.d_val + GLINK_CALL_STUB_SIZE - 8 * 4;
3475 /* The .glink section usually does not survive the final
3476 link; search for the section (usually .text) where the
3477 glink stubs now reside. */
3478 glink = bfd_sections_find_if (abfd, section_covers_vma,
3479 &glink_vma);
3480 break;
3481 }
3482 }
3483
3484 free (dynbuf);
3485 }
3486
3487 if (glink != NULL)
3488 {
3489 /* Determine __glink trampoline by reading the relative branch
3490 from the first glink stub. */
3491 bfd_byte buf[4];
3492 unsigned int off = 0;
3493
3494 while (bfd_get_section_contents (abfd, glink, buf,
3495 glink_vma + off - glink->vma, 4))
3496 {
3497 unsigned int insn = bfd_get_32 (abfd, buf);
3498 insn ^= B_DOT;
3499 if ((insn & ~0x3fffffc) == 0)
3500 {
3501 resolv_vma = glink_vma + off + (insn ^ 0x2000000) - 0x2000000;
3502 break;
3503 }
3504 off += 4;
3505 if (off > 4)
3506 break;
3507 }
3508
3509 if (resolv_vma)
3510 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
3511
3512 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
3513 if (relplt != NULL)
3514 {
3515 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3516 if (! (*slurp_relocs) (abfd, relplt, dyn_syms, TRUE))
3517 goto free_contents_and_exit_err;
3518
3519 plt_count = relplt->size / sizeof (Elf64_External_Rela);
3520 size += plt_count * sizeof (asymbol);
3521
3522 p = relplt->relocation;
3523 for (i = 0; i < plt_count; i++, p++)
3524 {
3525 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
3526 if (p->addend != 0)
3527 size += sizeof ("+0x") - 1 + 16;
3528 }
3529 }
3530 }
3531
3532 if (size == 0)
3533 goto free_contents_and_exit;
3534 s = *ret = bfd_malloc (size);
3535 if (s == NULL)
3536 goto free_contents_and_exit_err;
3537
3538 names = (char *) (s + count + plt_count + (resolv_vma != 0));
3539
3540 for (i = secsymend; i < opdsymend; ++i)
3541 {
3542 bfd_vma ent;
3543
3544 if (syms[i]->value > opd->size - 8)
3545 continue;
3546
3547 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3548 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3549 {
3550 long lo, hi;
3551 size_t len;
3552 asection *sec = abfd->sections;
3553
3554 *s = *syms[i];
3555 lo = codesecsym;
3556 hi = codesecsymend;
3557 while (lo < hi)
3558 {
3559 long mid = (lo + hi) >> 1;
3560 if (syms[mid]->section->vma < ent)
3561 lo = mid + 1;
3562 else if (syms[mid]->section->vma > ent)
3563 hi = mid;
3564 else
3565 {
3566 sec = syms[mid]->section;
3567 break;
3568 }
3569 }
3570
3571 if (lo >= hi && lo > codesecsym)
3572 sec = syms[lo - 1]->section;
3573
3574 for (; sec != NULL; sec = sec->next)
3575 {
3576 if (sec->vma > ent)
3577 break;
3578 /* SEC_LOAD may not be set if SEC is from a separate debug
3579 info file. */
3580 if ((sec->flags & SEC_ALLOC) == 0)
3581 break;
3582 if ((sec->flags & SEC_CODE) != 0)
3583 s->section = sec;
3584 }
3585 s->flags |= BSF_SYNTHETIC;
3586 s->value = ent - s->section->vma;
3587 s->name = names;
3588 *names++ = '.';
3589 len = strlen (syms[i]->name);
3590 memcpy (names, syms[i]->name, len + 1);
3591 names += len + 1;
3592 /* Have udata.p point back to the original symbol this
3593 synthetic symbol was derived from. */
3594 s->udata.p = syms[i];
3595 s++;
3596 }
3597 }
3598 free (contents);
3599
3600 if (glink != NULL && relplt != NULL)
3601 {
3602 if (resolv_vma)
3603 {
3604 /* Add a symbol for the main glink trampoline. */
3605 memset (s, 0, sizeof *s);
3606 s->the_bfd = abfd;
3607 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3608 s->section = glink;
3609 s->value = resolv_vma - glink->vma;
3610 s->name = names;
3611 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3612 names += sizeof ("__glink_PLTresolve");
3613 s++;
3614 count++;
3615 }
3616
3617 /* FIXME: It would be very much nicer to put sym@plt on the
3618 stub rather than on the glink branch table entry. The
3619 objdump disassembler would then use a sensible symbol
3620 name on plt calls. The difficulty in doing so is
3621 a) finding the stubs, and,
3622 b) matching stubs against plt entries, and,
3623 c) there can be multiple stubs for a given plt entry.
3624
3625 Solving (a) could be done by code scanning, but older
3626 ppc64 binaries used different stubs to current code.
3627 (b) is the tricky one since you need to known the toc
3628 pointer for at least one function that uses a pic stub to
3629 be able to calculate the plt address referenced.
3630 (c) means gdb would need to set multiple breakpoints (or
3631 find the glink branch itself) when setting breakpoints
3632 for pending shared library loads. */
3633 p = relplt->relocation;
3634 for (i = 0; i < plt_count; i++, p++)
3635 {
3636 size_t len;
3637
3638 *s = **p->sym_ptr_ptr;
3639 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
3640 we are defining a symbol, ensure one of them is set. */
3641 if ((s->flags & BSF_LOCAL) == 0)
3642 s->flags |= BSF_GLOBAL;
3643 s->flags |= BSF_SYNTHETIC;
3644 s->section = glink;
3645 s->value = glink_vma - glink->vma;
3646 s->name = names;
3647 s->udata.p = NULL;
3648 len = strlen ((*p->sym_ptr_ptr)->name);
3649 memcpy (names, (*p->sym_ptr_ptr)->name, len);
3650 names += len;
3651 if (p->addend != 0)
3652 {
3653 memcpy (names, "+0x", sizeof ("+0x") - 1);
3654 names += sizeof ("+0x") - 1;
3655 bfd_sprintf_vma (abfd, names, p->addend);
3656 names += strlen (names);
3657 }
3658 memcpy (names, "@plt", sizeof ("@plt"));
3659 names += sizeof ("@plt");
3660 s++;
3661 if (abi < 2)
3662 {
3663 glink_vma += 8;
3664 if (i >= 0x8000)
3665 glink_vma += 4;
3666 }
3667 else
3668 glink_vma += 4;
3669 }
3670 count += plt_count;
3671 }
3672 }
3673
3674 done:
3675 free (syms);
3676 return count;
3677 }
3678 \f
3679 /* The following functions are specific to the ELF linker, while
3680 functions above are used generally. Those named ppc64_elf_* are
3681 called by the main ELF linker code. They appear in this file more
3682 or less in the order in which they are called. eg.
3683 ppc64_elf_check_relocs is called early in the link process,
3684 ppc64_elf_finish_dynamic_sections is one of the last functions
3685 called.
3686
3687 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
3688 functions have both a function code symbol and a function descriptor
3689 symbol. A call to foo in a relocatable object file looks like:
3690
3691 . .text
3692 . x:
3693 . bl .foo
3694 . nop
3695
3696 The function definition in another object file might be:
3697
3698 . .section .opd
3699 . foo: .quad .foo
3700 . .quad .TOC.@tocbase
3701 . .quad 0
3702 .
3703 . .text
3704 . .foo: blr
3705
3706 When the linker resolves the call during a static link, the branch
3707 unsurprisingly just goes to .foo and the .opd information is unused.
3708 If the function definition is in a shared library, things are a little
3709 different: The call goes via a plt call stub, the opd information gets
3710 copied to the plt, and the linker patches the nop.
3711
3712 . x:
3713 . bl .foo_stub
3714 . ld 2,40(1)
3715 .
3716 .
3717 . .foo_stub:
3718 . std 2,40(1) # in practice, the call stub
3719 . addis 11,2,Lfoo@toc@ha # is slightly optimized, but
3720 . addi 11,11,Lfoo@toc@l # this is the general idea
3721 . ld 12,0(11)
3722 . ld 2,8(11)
3723 . mtctr 12
3724 . ld 11,16(11)
3725 . bctr
3726 .
3727 . .section .plt
3728 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
3729
3730 The "reloc ()" notation is supposed to indicate that the linker emits
3731 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
3732 copying.
3733
3734 What are the difficulties here? Well, firstly, the relocations
3735 examined by the linker in check_relocs are against the function code
3736 sym .foo, while the dynamic relocation in the plt is emitted against
3737 the function descriptor symbol, foo. Somewhere along the line, we need
3738 to carefully copy dynamic link information from one symbol to the other.
3739 Secondly, the generic part of the elf linker will make .foo a dynamic
3740 symbol as is normal for most other backends. We need foo dynamic
3741 instead, at least for an application final link. However, when
3742 creating a shared library containing foo, we need to have both symbols
3743 dynamic so that references to .foo are satisfied during the early
3744 stages of linking. Otherwise the linker might decide to pull in a
3745 definition from some other object, eg. a static library.
3746
3747 Update: As of August 2004, we support a new convention. Function
3748 calls may use the function descriptor symbol, ie. "bl foo". This
3749 behaves exactly as "bl .foo". */
3750
3751 /* Of those relocs that might be copied as dynamic relocs, this function
3752 selects those that must be copied when linking a shared library,
3753 even when the symbol is local. */
3754
3755 static int
3756 must_be_dyn_reloc (struct bfd_link_info *info,
3757 enum elf_ppc64_reloc_type r_type)
3758 {
3759 switch (r_type)
3760 {
3761 default:
3762 return 1;
3763
3764 case R_PPC64_REL32:
3765 case R_PPC64_REL64:
3766 case R_PPC64_REL30:
3767 return 0;
3768
3769 case R_PPC64_TPREL16:
3770 case R_PPC64_TPREL16_LO:
3771 case R_PPC64_TPREL16_HI:
3772 case R_PPC64_TPREL16_HA:
3773 case R_PPC64_TPREL16_DS:
3774 case R_PPC64_TPREL16_LO_DS:
3775 case R_PPC64_TPREL16_HIGH:
3776 case R_PPC64_TPREL16_HIGHA:
3777 case R_PPC64_TPREL16_HIGHER:
3778 case R_PPC64_TPREL16_HIGHERA:
3779 case R_PPC64_TPREL16_HIGHEST:
3780 case R_PPC64_TPREL16_HIGHESTA:
3781 case R_PPC64_TPREL64:
3782 return !bfd_link_executable (info);
3783 }
3784 }
3785
3786 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3787 copying dynamic variables from a shared lib into an app's dynbss
3788 section, and instead use a dynamic relocation to point into the
3789 shared lib. With code that gcc generates, it's vital that this be
3790 enabled; In the PowerPC64 ABI, the address of a function is actually
3791 the address of a function descriptor, which resides in the .opd
3792 section. gcc uses the descriptor directly rather than going via the
3793 GOT as some other ABI's do, which means that initialized function
3794 pointers must reference the descriptor. Thus, a function pointer
3795 initialized to the address of a function in a shared library will
3796 either require a copy reloc, or a dynamic reloc. Using a copy reloc
3797 redefines the function descriptor symbol to point to the copy. This
3798 presents a problem as a plt entry for that function is also
3799 initialized from the function descriptor symbol and the copy reloc
3800 may not be initialized first. */
3801 #define ELIMINATE_COPY_RELOCS 1
3802
3803 /* Section name for stubs is the associated section name plus this
3804 string. */
3805 #define STUB_SUFFIX ".stub"
3806
3807 /* Linker stubs.
3808 ppc_stub_long_branch:
3809 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
3810 destination, but a 24 bit branch in a stub section will reach.
3811 . b dest
3812
3813 ppc_stub_plt_branch:
3814 Similar to the above, but a 24 bit branch in the stub section won't
3815 reach its destination.
3816 . addis %r11,%r2,xxx@toc@ha
3817 . ld %r12,xxx@toc@l(%r11)
3818 . mtctr %r12
3819 . bctr
3820
3821 ppc_stub_plt_call:
3822 Used to call a function in a shared library. If it so happens that
3823 the plt entry referenced crosses a 64k boundary, then an extra
3824 "addi %r11,%r11,xxx@toc@l" will be inserted before the "mtctr".
3825 . std %r2,40(%r1)
3826 . addis %r11,%r2,xxx@toc@ha
3827 . ld %r12,xxx+0@toc@l(%r11)
3828 . mtctr %r12
3829 . ld %r2,xxx+8@toc@l(%r11)
3830 . ld %r11,xxx+16@toc@l(%r11)
3831 . bctr
3832
3833 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
3834 code to adjust the value and save r2 to support multiple toc sections.
3835 A ppc_stub_long_branch with an r2 offset looks like:
3836 . std %r2,40(%r1)
3837 . addis %r2,%r2,off@ha
3838 . addi %r2,%r2,off@l
3839 . b dest
3840
3841 A ppc_stub_plt_branch with an r2 offset looks like:
3842 . std %r2,40(%r1)
3843 . addis %r11,%r2,xxx@toc@ha
3844 . ld %r12,xxx@toc@l(%r11)
3845 . addis %r2,%r2,off@ha
3846 . addi %r2,%r2,off@l
3847 . mtctr %r12
3848 . bctr
3849
3850 In cases where the "addis" instruction would add zero, the "addis" is
3851 omitted and following instructions modified slightly in some cases.
3852 */
3853
3854 enum ppc_stub_type {
3855 ppc_stub_none,
3856 ppc_stub_long_branch,
3857 ppc_stub_long_branch_r2off,
3858 ppc_stub_plt_branch,
3859 ppc_stub_plt_branch_r2off,
3860 ppc_stub_plt_call,
3861 ppc_stub_plt_call_r2save,
3862 ppc_stub_global_entry,
3863 ppc_stub_save_res
3864 };
3865
3866 /* Information on stub grouping. */
3867 struct map_stub
3868 {
3869 /* The stub section. */
3870 asection *stub_sec;
3871 /* This is the section to which stubs in the group will be attached. */
3872 asection *link_sec;
3873 /* Next group. */
3874 struct map_stub *next;
3875 /* Whether to emit a copy of register save/restore functions in this
3876 group. */
3877 int needs_save_res;
3878 };
3879
3880 struct ppc_stub_hash_entry {
3881
3882 /* Base hash table entry structure. */
3883 struct bfd_hash_entry root;
3884
3885 enum ppc_stub_type stub_type;
3886
3887 /* Group information. */
3888 struct map_stub *group;
3889
3890 /* Offset within stub_sec of the beginning of this stub. */
3891 bfd_vma stub_offset;
3892
3893 /* Given the symbol's value and its section we can determine its final
3894 value when building the stubs (so the stub knows where to jump. */
3895 bfd_vma target_value;
3896 asection *target_section;
3897
3898 /* The symbol table entry, if any, that this was derived from. */
3899 struct ppc_link_hash_entry *h;
3900 struct plt_entry *plt_ent;
3901
3902 /* Symbol st_other. */
3903 unsigned char other;
3904 };
3905
3906 struct ppc_branch_hash_entry {
3907
3908 /* Base hash table entry structure. */
3909 struct bfd_hash_entry root;
3910
3911 /* Offset within branch lookup table. */
3912 unsigned int offset;
3913
3914 /* Generation marker. */
3915 unsigned int iter;
3916 };
3917
3918 /* Used to track dynamic relocations for local symbols. */
3919 struct ppc_dyn_relocs
3920 {
3921 struct ppc_dyn_relocs *next;
3922
3923 /* The input section of the reloc. */
3924 asection *sec;
3925
3926 /* Total number of relocs copied for the input section. */
3927 unsigned int count : 31;
3928
3929 /* Whether this entry is for STT_GNU_IFUNC symbols. */
3930 unsigned int ifunc : 1;
3931 };
3932
3933 struct ppc_link_hash_entry
3934 {
3935 struct elf_link_hash_entry elf;
3936
3937 union {
3938 /* A pointer to the most recently used stub hash entry against this
3939 symbol. */
3940 struct ppc_stub_hash_entry *stub_cache;
3941
3942 /* A pointer to the next symbol starting with a '.' */
3943 struct ppc_link_hash_entry *next_dot_sym;
3944 } u;
3945
3946 /* Track dynamic relocs copied for this symbol. */
3947 struct elf_dyn_relocs *dyn_relocs;
3948
3949 /* Link between function code and descriptor symbols. */
3950 struct ppc_link_hash_entry *oh;
3951
3952 /* Flag function code and descriptor symbols. */
3953 unsigned int is_func:1;
3954 unsigned int is_func_descriptor:1;
3955 unsigned int fake:1;
3956
3957 /* Whether global opd/toc sym has been adjusted or not.
3958 After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
3959 should be set for all globals defined in any opd/toc section. */
3960 unsigned int adjust_done:1;
3961
3962 /* Set if we twiddled this symbol to weak at some stage. */
3963 unsigned int was_undefined:1;
3964
3965 /* Set if this is an out-of-line register save/restore function,
3966 with non-standard calling convention. */
3967 unsigned int save_res:1;
3968
3969 /* Contexts in which symbol is used in the GOT (or TOC).
3970 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
3971 corresponding relocs are encountered during check_relocs.
3972 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3973 indicate the corresponding GOT entry type is not needed.
3974 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
3975 a TPREL one. We use a separate flag rather than setting TPREL
3976 just for convenience in distinguishing the two cases. */
3977 #define TLS_GD 1 /* GD reloc. */
3978 #define TLS_LD 2 /* LD reloc. */
3979 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3980 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3981 #define TLS_TLS 16 /* Any TLS reloc. */
3982 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
3983 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
3984 #define PLT_IFUNC 128 /* STT_GNU_IFUNC. */
3985 unsigned char tls_mask;
3986 };
3987
3988 /* ppc64 ELF linker hash table. */
3989
3990 struct ppc_link_hash_table
3991 {
3992 struct elf_link_hash_table elf;
3993
3994 /* The stub hash table. */
3995 struct bfd_hash_table stub_hash_table;
3996
3997 /* Another hash table for plt_branch stubs. */
3998 struct bfd_hash_table branch_hash_table;
3999
4000 /* Hash table for function prologue tocsave. */
4001 htab_t tocsave_htab;
4002
4003 /* Various options and other info passed from the linker. */
4004 struct ppc64_elf_params *params;
4005
4006 /* The size of sec_info below. */
4007 unsigned int sec_info_arr_size;
4008
4009 /* Per-section array of extra section info. Done this way rather
4010 than as part of ppc64_elf_section_data so we have the info for
4011 non-ppc64 sections. */
4012 struct
4013 {
4014 /* Along with elf_gp, specifies the TOC pointer used by this section. */
4015 bfd_vma toc_off;
4016
4017 union
4018 {
4019 /* The section group that this section belongs to. */
4020 struct map_stub *group;
4021 /* A temp section list pointer. */
4022 asection *list;
4023 } u;
4024 } *sec_info;
4025
4026 /* Linked list of groups. */
4027 struct map_stub *group;
4028
4029 /* Temp used when calculating TOC pointers. */
4030 bfd_vma toc_curr;
4031 bfd *toc_bfd;
4032 asection *toc_first_sec;
4033
4034 /* Used when adding symbols. */
4035 struct ppc_link_hash_entry *dot_syms;
4036
4037 /* Shortcuts to get to dynamic linker sections. */
4038 asection *dynbss;
4039 asection *relbss;
4040 asection *glink;
4041 asection *sfpr;
4042 asection *brlt;
4043 asection *relbrlt;
4044 asection *glink_eh_frame;
4045
4046 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
4047 struct ppc_link_hash_entry *tls_get_addr;
4048 struct ppc_link_hash_entry *tls_get_addr_fd;
4049
4050 /* The size of reliplt used by got entry relocs. */
4051 bfd_size_type got_reli_size;
4052
4053 /* Statistics. */
4054 unsigned long stub_count[ppc_stub_global_entry];
4055
4056 /* Number of stubs against global syms. */
4057 unsigned long stub_globals;
4058
4059 /* Set if we're linking code with function descriptors. */
4060 unsigned int opd_abi:1;
4061
4062 /* Support for multiple toc sections. */
4063 unsigned int do_multi_toc:1;
4064 unsigned int multi_toc_needed:1;
4065 unsigned int second_toc_pass:1;
4066 unsigned int do_toc_opt:1;
4067
4068 /* Set on error. */
4069 unsigned int stub_error:1;
4070
4071 /* Temp used by ppc64_elf_before_check_relocs. */
4072 unsigned int twiddled_syms:1;
4073
4074 /* Incremented every time we size stubs. */
4075 unsigned int stub_iteration;
4076
4077 /* Small local sym cache. */
4078 struct sym_cache sym_cache;
4079 };
4080
4081 /* Rename some of the generic section flags to better document how they
4082 are used here. */
4083
4084 /* Nonzero if this section has TLS related relocations. */
4085 #define has_tls_reloc sec_flg0
4086
4087 /* Nonzero if this section has a call to __tls_get_addr. */
4088 #define has_tls_get_addr_call sec_flg1
4089
4090 /* Nonzero if this section has any toc or got relocs. */
4091 #define has_toc_reloc sec_flg2
4092
4093 /* Nonzero if this section has a call to another section that uses
4094 the toc or got. */
4095 #define makes_toc_func_call sec_flg3
4096
4097 /* Recursion protection when determining above flag. */
4098 #define call_check_in_progress sec_flg4
4099 #define call_check_done sec_flg5
4100
4101 /* Get the ppc64 ELF linker hash table from a link_info structure. */
4102
4103 #define ppc_hash_table(p) \
4104 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
4105 == PPC64_ELF_DATA ? ((struct ppc_link_hash_table *) ((p)->hash)) : NULL)
4106
4107 #define ppc_stub_hash_lookup(table, string, create, copy) \
4108 ((struct ppc_stub_hash_entry *) \
4109 bfd_hash_lookup ((table), (string), (create), (copy)))
4110
4111 #define ppc_branch_hash_lookup(table, string, create, copy) \
4112 ((struct ppc_branch_hash_entry *) \
4113 bfd_hash_lookup ((table), (string), (create), (copy)))
4114
4115 /* Create an entry in the stub hash table. */
4116
4117 static struct bfd_hash_entry *
4118 stub_hash_newfunc (struct bfd_hash_entry *entry,
4119 struct bfd_hash_table *table,
4120 const char *string)
4121 {
4122 /* Allocate the structure if it has not already been allocated by a
4123 subclass. */
4124 if (entry == NULL)
4125 {
4126 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
4127 if (entry == NULL)
4128 return entry;
4129 }
4130
4131 /* Call the allocation method of the superclass. */
4132 entry = bfd_hash_newfunc (entry, table, string);
4133 if (entry != NULL)
4134 {
4135 struct ppc_stub_hash_entry *eh;
4136
4137 /* Initialize the local fields. */
4138 eh = (struct ppc_stub_hash_entry *) entry;
4139 eh->stub_type = ppc_stub_none;
4140 eh->group = NULL;
4141 eh->stub_offset = 0;
4142 eh->target_value = 0;
4143 eh->target_section = NULL;
4144 eh->h = NULL;
4145 eh->plt_ent = NULL;
4146 eh->other = 0;
4147 }
4148
4149 return entry;
4150 }
4151
4152 /* Create an entry in the branch hash table. */
4153
4154 static struct bfd_hash_entry *
4155 branch_hash_newfunc (struct bfd_hash_entry *entry,
4156 struct bfd_hash_table *table,
4157 const char *string)
4158 {
4159 /* Allocate the structure if it has not already been allocated by a
4160 subclass. */
4161 if (entry == NULL)
4162 {
4163 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
4164 if (entry == NULL)
4165 return entry;
4166 }
4167
4168 /* Call the allocation method of the superclass. */
4169 entry = bfd_hash_newfunc (entry, table, string);
4170 if (entry != NULL)
4171 {
4172 struct ppc_branch_hash_entry *eh;
4173
4174 /* Initialize the local fields. */
4175 eh = (struct ppc_branch_hash_entry *) entry;
4176 eh->offset = 0;
4177 eh->iter = 0;
4178 }
4179
4180 return entry;
4181 }
4182
4183 /* Create an entry in a ppc64 ELF linker hash table. */
4184
4185 static struct bfd_hash_entry *
4186 link_hash_newfunc (struct bfd_hash_entry *entry,
4187 struct bfd_hash_table *table,
4188 const char *string)
4189 {
4190 /* Allocate the structure if it has not already been allocated by a
4191 subclass. */
4192 if (entry == NULL)
4193 {
4194 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
4195 if (entry == NULL)
4196 return entry;
4197 }
4198
4199 /* Call the allocation method of the superclass. */
4200 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
4201 if (entry != NULL)
4202 {
4203 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
4204
4205 memset (&eh->u.stub_cache, 0,
4206 (sizeof (struct ppc_link_hash_entry)
4207 - offsetof (struct ppc_link_hash_entry, u.stub_cache)));
4208
4209 /* When making function calls, old ABI code references function entry
4210 points (dot symbols), while new ABI code references the function
4211 descriptor symbol. We need to make any combination of reference and
4212 definition work together, without breaking archive linking.
4213
4214 For a defined function "foo" and an undefined call to "bar":
4215 An old object defines "foo" and ".foo", references ".bar" (possibly
4216 "bar" too).
4217 A new object defines "foo" and references "bar".
4218
4219 A new object thus has no problem with its undefined symbols being
4220 satisfied by definitions in an old object. On the other hand, the
4221 old object won't have ".bar" satisfied by a new object.
4222
4223 Keep a list of newly added dot-symbols. */
4224
4225 if (string[0] == '.')
4226 {
4227 struct ppc_link_hash_table *htab;
4228
4229 htab = (struct ppc_link_hash_table *) table;
4230 eh->u.next_dot_sym = htab->dot_syms;
4231 htab->dot_syms = eh;
4232 }
4233 }
4234
4235 return entry;
4236 }
4237
4238 struct tocsave_entry {
4239 asection *sec;
4240 bfd_vma offset;
4241 };
4242
4243 static hashval_t
4244 tocsave_htab_hash (const void *p)
4245 {
4246 const struct tocsave_entry *e = (const struct tocsave_entry *) p;
4247 return ((bfd_vma)(intptr_t) e->sec ^ e->offset) >> 3;
4248 }
4249
4250 static int
4251 tocsave_htab_eq (const void *p1, const void *p2)
4252 {
4253 const struct tocsave_entry *e1 = (const struct tocsave_entry *) p1;
4254 const struct tocsave_entry *e2 = (const struct tocsave_entry *) p2;
4255 return e1->sec == e2->sec && e1->offset == e2->offset;
4256 }
4257
4258 /* Destroy a ppc64 ELF linker hash table. */
4259
4260 static void
4261 ppc64_elf_link_hash_table_free (bfd *obfd)
4262 {
4263 struct ppc_link_hash_table *htab;
4264
4265 htab = (struct ppc_link_hash_table *) obfd->link.hash;
4266 if (htab->tocsave_htab)
4267 htab_delete (htab->tocsave_htab);
4268 bfd_hash_table_free (&htab->branch_hash_table);
4269 bfd_hash_table_free (&htab->stub_hash_table);
4270 _bfd_elf_link_hash_table_free (obfd);
4271 }
4272
4273 /* Create a ppc64 ELF linker hash table. */
4274
4275 static struct bfd_link_hash_table *
4276 ppc64_elf_link_hash_table_create (bfd *abfd)
4277 {
4278 struct ppc_link_hash_table *htab;
4279 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
4280
4281 htab = bfd_zmalloc (amt);
4282 if (htab == NULL)
4283 return NULL;
4284
4285 if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc,
4286 sizeof (struct ppc_link_hash_entry),
4287 PPC64_ELF_DATA))
4288 {
4289 free (htab);
4290 return NULL;
4291 }
4292
4293 /* Init the stub hash table too. */
4294 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc,
4295 sizeof (struct ppc_stub_hash_entry)))
4296 {
4297 _bfd_elf_link_hash_table_free (abfd);
4298 return NULL;
4299 }
4300
4301 /* And the branch hash table. */
4302 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc,
4303 sizeof (struct ppc_branch_hash_entry)))
4304 {
4305 bfd_hash_table_free (&htab->stub_hash_table);
4306 _bfd_elf_link_hash_table_free (abfd);
4307 return NULL;
4308 }
4309
4310 htab->tocsave_htab = htab_try_create (1024,
4311 tocsave_htab_hash,
4312 tocsave_htab_eq,
4313 NULL);
4314 if (htab->tocsave_htab == NULL)
4315 {
4316 ppc64_elf_link_hash_table_free (abfd);
4317 return NULL;
4318 }
4319 htab->elf.root.hash_table_free = ppc64_elf_link_hash_table_free;
4320
4321 /* Initializing two fields of the union is just cosmetic. We really
4322 only care about glist, but when compiled on a 32-bit host the
4323 bfd_vma fields are larger. Setting the bfd_vma to zero makes
4324 debugger inspection of these fields look nicer. */
4325 htab->elf.init_got_refcount.refcount = 0;
4326 htab->elf.init_got_refcount.glist = NULL;
4327 htab->elf.init_plt_refcount.refcount = 0;
4328 htab->elf.init_plt_refcount.glist = NULL;
4329 htab->elf.init_got_offset.offset = 0;
4330 htab->elf.init_got_offset.glist = NULL;
4331 htab->elf.init_plt_offset.offset = 0;
4332 htab->elf.init_plt_offset.glist = NULL;
4333
4334 return &htab->elf.root;
4335 }
4336
4337 /* Create sections for linker generated code. */
4338
4339 static bfd_boolean
4340 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
4341 {
4342 struct ppc_link_hash_table *htab;
4343 flagword flags;
4344
4345 htab = ppc_hash_table (info);
4346
4347 /* Create .sfpr for code to save and restore fp regs. */
4348 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
4349 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4350 htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr",
4351 flags);
4352 if (htab->sfpr == NULL
4353 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
4354 return FALSE;
4355
4356 /* Create .glink for lazy dynamic linking support. */
4357 htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink",
4358 flags);
4359 if (htab->glink == NULL
4360 || ! bfd_set_section_alignment (dynobj, htab->glink, 3))
4361 return FALSE;
4362
4363 if (!info->no_ld_generated_unwind_info)
4364 {
4365 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
4366 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4367 htab->glink_eh_frame = bfd_make_section_anyway_with_flags (dynobj,
4368 ".eh_frame",
4369 flags);
4370 if (htab->glink_eh_frame == NULL
4371 || !bfd_set_section_alignment (dynobj, htab->glink_eh_frame, 2))
4372 return FALSE;
4373 }
4374
4375 flags = SEC_ALLOC | SEC_LINKER_CREATED;
4376 htab->elf.iplt = bfd_make_section_anyway_with_flags (dynobj, ".iplt", flags);
4377 if (htab->elf.iplt == NULL
4378 || ! bfd_set_section_alignment (dynobj, htab->elf.iplt, 3))
4379 return FALSE;
4380
4381 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4382 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4383 htab->elf.irelplt
4384 = bfd_make_section_anyway_with_flags (dynobj, ".rela.iplt", flags);
4385 if (htab->elf.irelplt == NULL
4386 || ! bfd_set_section_alignment (dynobj, htab->elf.irelplt, 3))
4387 return FALSE;
4388
4389 /* Create branch lookup table for plt_branch stubs. */
4390 flags = (SEC_ALLOC | SEC_LOAD
4391 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4392 htab->brlt = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt",
4393 flags);
4394 if (htab->brlt == NULL
4395 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
4396 return FALSE;
4397
4398 if (!bfd_link_pic (info))
4399 return TRUE;
4400
4401 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4402 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4403 htab->relbrlt = bfd_make_section_anyway_with_flags (dynobj,
4404 ".rela.branch_lt",
4405 flags);
4406 if (htab->relbrlt == NULL
4407 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
4408 return FALSE;
4409
4410 return TRUE;
4411 }
4412
4413 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
4414
4415 bfd_boolean
4416 ppc64_elf_init_stub_bfd (struct bfd_link_info *info,
4417 struct ppc64_elf_params *params)
4418 {
4419 struct ppc_link_hash_table *htab;
4420
4421 elf_elfheader (params->stub_bfd)->e_ident[EI_CLASS] = ELFCLASS64;
4422
4423 /* Always hook our dynamic sections into the first bfd, which is the
4424 linker created stub bfd. This ensures that the GOT header is at
4425 the start of the output TOC section. */
4426 htab = ppc_hash_table (info);
4427 if (htab == NULL)
4428 return FALSE;
4429 htab->elf.dynobj = params->stub_bfd;
4430 htab->params = params;
4431
4432 if (bfd_link_relocatable (info))
4433 return TRUE;
4434
4435 return create_linkage_sections (htab->elf.dynobj, info);
4436 }
4437
4438 /* Build a name for an entry in the stub hash table. */
4439
4440 static char *
4441 ppc_stub_name (const asection *input_section,
4442 const asection *sym_sec,
4443 const struct ppc_link_hash_entry *h,
4444 const Elf_Internal_Rela *rel)
4445 {
4446 char *stub_name;
4447 ssize_t len;
4448
4449 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
4450 offsets from a sym as a branch target? In fact, we could
4451 probably assume the addend is always zero. */
4452 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
4453
4454 if (h)
4455 {
4456 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
4457 stub_name = bfd_malloc (len);
4458 if (stub_name == NULL)
4459 return stub_name;
4460
4461 len = sprintf (stub_name, "%08x.%s+%x",
4462 input_section->id & 0xffffffff,
4463 h->elf.root.root.string,
4464 (int) rel->r_addend & 0xffffffff);
4465 }
4466 else
4467 {
4468 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
4469 stub_name = bfd_malloc (len);
4470 if (stub_name == NULL)
4471 return stub_name;
4472
4473 len = sprintf (stub_name, "%08x.%x:%x+%x",
4474 input_section->id & 0xffffffff,
4475 sym_sec->id & 0xffffffff,
4476 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
4477 (int) rel->r_addend & 0xffffffff);
4478 }
4479 if (len > 2 && stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
4480 stub_name[len - 2] = 0;
4481 return stub_name;
4482 }
4483
4484 /* Look up an entry in the stub hash. Stub entries are cached because
4485 creating the stub name takes a bit of time. */
4486
4487 static struct ppc_stub_hash_entry *
4488 ppc_get_stub_entry (const asection *input_section,
4489 const asection *sym_sec,
4490 struct ppc_link_hash_entry *h,
4491 const Elf_Internal_Rela *rel,
4492 struct ppc_link_hash_table *htab)
4493 {
4494 struct ppc_stub_hash_entry *stub_entry;
4495 struct map_stub *group;
4496
4497 /* If this input section is part of a group of sections sharing one
4498 stub section, then use the id of the first section in the group.
4499 Stub names need to include a section id, as there may well be
4500 more than one stub used to reach say, printf, and we need to
4501 distinguish between them. */
4502 group = htab->sec_info[input_section->id].u.group;
4503
4504 if (h != NULL && h->u.stub_cache != NULL
4505 && h->u.stub_cache->h == h
4506 && h->u.stub_cache->group == group)
4507 {
4508 stub_entry = h->u.stub_cache;
4509 }
4510 else
4511 {
4512 char *stub_name;
4513
4514 stub_name = ppc_stub_name (group->link_sec, sym_sec, h, rel);
4515 if (stub_name == NULL)
4516 return NULL;
4517
4518 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
4519 stub_name, FALSE, FALSE);
4520 if (h != NULL)
4521 h->u.stub_cache = stub_entry;
4522
4523 free (stub_name);
4524 }
4525
4526 return stub_entry;
4527 }
4528
4529 /* Add a new stub entry to the stub hash. Not all fields of the new
4530 stub entry are initialised. */
4531
4532 static struct ppc_stub_hash_entry *
4533 ppc_add_stub (const char *stub_name,
4534 asection *section,
4535 struct bfd_link_info *info)
4536 {
4537 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4538 struct map_stub *group;
4539 asection *link_sec;
4540 asection *stub_sec;
4541 struct ppc_stub_hash_entry *stub_entry;
4542
4543 group = htab->sec_info[section->id].u.group;
4544 link_sec = group->link_sec;
4545 stub_sec = group->stub_sec;
4546 if (stub_sec == NULL)
4547 {
4548 size_t namelen;
4549 bfd_size_type len;
4550 char *s_name;
4551
4552 namelen = strlen (link_sec->name);
4553 len = namelen + sizeof (STUB_SUFFIX);
4554 s_name = bfd_alloc (htab->params->stub_bfd, len);
4555 if (s_name == NULL)
4556 return NULL;
4557
4558 memcpy (s_name, link_sec->name, namelen);
4559 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
4560 stub_sec = (*htab->params->add_stub_section) (s_name, link_sec);
4561 if (stub_sec == NULL)
4562 return NULL;
4563 group->stub_sec = stub_sec;
4564 }
4565
4566 /* Enter this entry into the linker stub hash table. */
4567 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
4568 TRUE, FALSE);
4569 if (stub_entry == NULL)
4570 {
4571 info->callbacks->einfo (_("%P: %B: cannot create stub entry %s\n"),
4572 section->owner, stub_name);
4573 return NULL;
4574 }
4575
4576 stub_entry->group = group;
4577 stub_entry->stub_offset = 0;
4578 return stub_entry;
4579 }
4580
4581 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
4582 not already done. */
4583
4584 static bfd_boolean
4585 create_got_section (bfd *abfd, struct bfd_link_info *info)
4586 {
4587 asection *got, *relgot;
4588 flagword flags;
4589 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4590
4591 if (!is_ppc64_elf (abfd))
4592 return FALSE;
4593 if (htab == NULL)
4594 return FALSE;
4595
4596 if (!htab->elf.sgot
4597 && !_bfd_elf_create_got_section (htab->elf.dynobj, info))
4598 return FALSE;
4599
4600 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
4601 | SEC_LINKER_CREATED);
4602
4603 got = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
4604 if (!got
4605 || !bfd_set_section_alignment (abfd, got, 3))
4606 return FALSE;
4607
4608 relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got",
4609 flags | SEC_READONLY);
4610 if (!relgot
4611 || ! bfd_set_section_alignment (abfd, relgot, 3))
4612 return FALSE;
4613
4614 ppc64_elf_tdata (abfd)->got = got;
4615 ppc64_elf_tdata (abfd)->relgot = relgot;
4616 return TRUE;
4617 }
4618
4619 /* Create the dynamic sections, and set up shortcuts. */
4620
4621 static bfd_boolean
4622 ppc64_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
4623 {
4624 struct ppc_link_hash_table *htab;
4625
4626 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
4627 return FALSE;
4628
4629 htab = ppc_hash_table (info);
4630 if (htab == NULL)
4631 return FALSE;
4632
4633 htab->dynbss = bfd_get_linker_section (dynobj, ".dynbss");
4634 if (!bfd_link_pic (info))
4635 htab->relbss = bfd_get_linker_section (dynobj, ".rela.bss");
4636
4637 if (!htab->elf.sgot || !htab->elf.splt || !htab->elf.srelplt || !htab->dynbss
4638 || (!bfd_link_pic (info) && !htab->relbss))
4639 abort ();
4640
4641 return TRUE;
4642 }
4643
4644 /* Follow indirect and warning symbol links. */
4645
4646 static inline struct bfd_link_hash_entry *
4647 follow_link (struct bfd_link_hash_entry *h)
4648 {
4649 while (h->type == bfd_link_hash_indirect
4650 || h->type == bfd_link_hash_warning)
4651 h = h->u.i.link;
4652 return h;
4653 }
4654
4655 static inline struct elf_link_hash_entry *
4656 elf_follow_link (struct elf_link_hash_entry *h)
4657 {
4658 return (struct elf_link_hash_entry *) follow_link (&h->root);
4659 }
4660
4661 static inline struct ppc_link_hash_entry *
4662 ppc_follow_link (struct ppc_link_hash_entry *h)
4663 {
4664 return (struct ppc_link_hash_entry *) follow_link (&h->elf.root);
4665 }
4666
4667 /* Merge PLT info on FROM with that on TO. */
4668
4669 static void
4670 move_plt_plist (struct ppc_link_hash_entry *from,
4671 struct ppc_link_hash_entry *to)
4672 {
4673 if (from->elf.plt.plist != NULL)
4674 {
4675 if (to->elf.plt.plist != NULL)
4676 {
4677 struct plt_entry **entp;
4678 struct plt_entry *ent;
4679
4680 for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; )
4681 {
4682 struct plt_entry *dent;
4683
4684 for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next)
4685 if (dent->addend == ent->addend)
4686 {
4687 dent->plt.refcount += ent->plt.refcount;
4688 *entp = ent->next;
4689 break;
4690 }
4691 if (dent == NULL)
4692 entp = &ent->next;
4693 }
4694 *entp = to->elf.plt.plist;
4695 }
4696
4697 to->elf.plt.plist = from->elf.plt.plist;
4698 from->elf.plt.plist = NULL;
4699 }
4700 }
4701
4702 /* Copy the extra info we tack onto an elf_link_hash_entry. */
4703
4704 static void
4705 ppc64_elf_copy_indirect_symbol (struct bfd_link_info *info,
4706 struct elf_link_hash_entry *dir,
4707 struct elf_link_hash_entry *ind)
4708 {
4709 struct ppc_link_hash_entry *edir, *eind;
4710
4711 edir = (struct ppc_link_hash_entry *) dir;
4712 eind = (struct ppc_link_hash_entry *) ind;
4713
4714 edir->is_func |= eind->is_func;
4715 edir->is_func_descriptor |= eind->is_func_descriptor;
4716 edir->tls_mask |= eind->tls_mask;
4717 if (eind->oh != NULL)
4718 edir->oh = ppc_follow_link (eind->oh);
4719
4720 /* If called to transfer flags for a weakdef during processing
4721 of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF.
4722 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
4723 if (!(ELIMINATE_COPY_RELOCS
4724 && eind->elf.root.type != bfd_link_hash_indirect
4725 && edir->elf.dynamic_adjusted))
4726 edir->elf.non_got_ref |= eind->elf.non_got_ref;
4727
4728 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
4729 edir->elf.ref_regular |= eind->elf.ref_regular;
4730 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
4731 edir->elf.needs_plt |= eind->elf.needs_plt;
4732 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed;
4733
4734 /* Copy over any dynamic relocs we may have on the indirect sym. */
4735 if (eind->dyn_relocs != NULL)
4736 {
4737 if (edir->dyn_relocs != NULL)
4738 {
4739 struct elf_dyn_relocs **pp;
4740 struct elf_dyn_relocs *p;
4741
4742 /* Add reloc counts against the indirect sym to the direct sym
4743 list. Merge any entries against the same section. */
4744 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
4745 {
4746 struct elf_dyn_relocs *q;
4747
4748 for (q = edir->dyn_relocs; q != NULL; q = q->next)
4749 if (q->sec == p->sec)
4750 {
4751 q->pc_count += p->pc_count;
4752 q->count += p->count;
4753 *pp = p->next;
4754 break;
4755 }
4756 if (q == NULL)
4757 pp = &p->next;
4758 }
4759 *pp = edir->dyn_relocs;
4760 }
4761
4762 edir->dyn_relocs = eind->dyn_relocs;
4763 eind->dyn_relocs = NULL;
4764 }
4765
4766 /* If we were called to copy over info for a weak sym, that's all.
4767 You might think dyn_relocs need not be copied over; After all,
4768 both syms will be dynamic or both non-dynamic so we're just
4769 moving reloc accounting around. However, ELIMINATE_COPY_RELOCS
4770 code in ppc64_elf_adjust_dynamic_symbol needs to check for
4771 dyn_relocs in read-only sections, and it does so on what is the
4772 DIR sym here. */
4773 if (eind->elf.root.type != bfd_link_hash_indirect)
4774 return;
4775
4776 /* Copy over got entries that we may have already seen to the
4777 symbol which just became indirect. */
4778 if (eind->elf.got.glist != NULL)
4779 {
4780 if (edir->elf.got.glist != NULL)
4781 {
4782 struct got_entry **entp;
4783 struct got_entry *ent;
4784
4785 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
4786 {
4787 struct got_entry *dent;
4788
4789 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
4790 if (dent->addend == ent->addend
4791 && dent->owner == ent->owner
4792 && dent->tls_type == ent->tls_type)
4793 {
4794 dent->got.refcount += ent->got.refcount;
4795 *entp = ent->next;
4796 break;
4797 }
4798 if (dent == NULL)
4799 entp = &ent->next;
4800 }
4801 *entp = edir->elf.got.glist;
4802 }
4803
4804 edir->elf.got.glist = eind->elf.got.glist;
4805 eind->elf.got.glist = NULL;
4806 }
4807
4808 /* And plt entries. */
4809 move_plt_plist (eind, edir);
4810
4811 if (eind->elf.dynindx != -1)
4812 {
4813 if (edir->elf.dynindx != -1)
4814 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4815 edir->elf.dynstr_index);
4816 edir->elf.dynindx = eind->elf.dynindx;
4817 edir->elf.dynstr_index = eind->elf.dynstr_index;
4818 eind->elf.dynindx = -1;
4819 eind->elf.dynstr_index = 0;
4820 }
4821 }
4822
4823 /* Find the function descriptor hash entry from the given function code
4824 hash entry FH. Link the entries via their OH fields. */
4825
4826 static struct ppc_link_hash_entry *
4827 lookup_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
4828 {
4829 struct ppc_link_hash_entry *fdh = fh->oh;
4830
4831 if (fdh == NULL)
4832 {
4833 const char *fd_name = fh->elf.root.root.string + 1;
4834
4835 fdh = (struct ppc_link_hash_entry *)
4836 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
4837 if (fdh == NULL)
4838 return fdh;
4839
4840 fdh->is_func_descriptor = 1;
4841 fdh->oh = fh;
4842 fh->is_func = 1;
4843 fh->oh = fdh;
4844 }
4845
4846 return ppc_follow_link (fdh);
4847 }
4848
4849 /* Make a fake function descriptor sym for the code sym FH. */
4850
4851 static struct ppc_link_hash_entry *
4852 make_fdh (struct bfd_link_info *info,
4853 struct ppc_link_hash_entry *fh)
4854 {
4855 bfd *abfd;
4856 asymbol *newsym;
4857 struct bfd_link_hash_entry *bh;
4858 struct ppc_link_hash_entry *fdh;
4859
4860 abfd = fh->elf.root.u.undef.abfd;
4861 newsym = bfd_make_empty_symbol (abfd);
4862 newsym->name = fh->elf.root.root.string + 1;
4863 newsym->section = bfd_und_section_ptr;
4864 newsym->value = 0;
4865 newsym->flags = BSF_WEAK;
4866
4867 bh = NULL;
4868 if (!_bfd_generic_link_add_one_symbol (info, abfd, newsym->name,
4869 newsym->flags, newsym->section,
4870 newsym->value, NULL, FALSE, FALSE,
4871 &bh))
4872 return NULL;
4873
4874 fdh = (struct ppc_link_hash_entry *) bh;
4875 fdh->elf.non_elf = 0;
4876 fdh->fake = 1;
4877 fdh->is_func_descriptor = 1;
4878 fdh->oh = fh;
4879 fh->is_func = 1;
4880 fh->oh = fdh;
4881 return fdh;
4882 }
4883
4884 /* Fix function descriptor symbols defined in .opd sections to be
4885 function type. */
4886
4887 static bfd_boolean
4888 ppc64_elf_add_symbol_hook (bfd *ibfd,
4889 struct bfd_link_info *info,
4890 Elf_Internal_Sym *isym,
4891 const char **name,
4892 flagword *flags ATTRIBUTE_UNUSED,
4893 asection **sec,
4894 bfd_vma *value)
4895 {
4896 if ((ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC
4897 || ELF_ST_BIND (isym->st_info) == STB_GNU_UNIQUE)
4898 && (ibfd->flags & DYNAMIC) == 0
4899 && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour)
4900 elf_tdata (info->output_bfd)->has_gnu_symbols = elf_gnu_symbol_any;
4901
4902 if (*sec != NULL
4903 && strcmp ((*sec)->name, ".opd") == 0)
4904 {
4905 asection *code_sec;
4906
4907 if (!(ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC
4908 || ELF_ST_TYPE (isym->st_info) == STT_FUNC))
4909 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
4910
4911 /* If the symbol is a function defined in .opd, and the function
4912 code is in a discarded group, let it appear to be undefined. */
4913 if (!bfd_link_relocatable (info)
4914 && (*sec)->reloc_count != 0
4915 && opd_entry_value (*sec, *value, &code_sec, NULL,
4916 FALSE) != (bfd_vma) -1
4917 && discarded_section (code_sec))
4918 {
4919 *sec = bfd_und_section_ptr;
4920 isym->st_shndx = SHN_UNDEF;
4921 }
4922 }
4923 else if (*sec != NULL
4924 && strcmp ((*sec)->name, ".toc") == 0
4925 && ELF_ST_TYPE (isym->st_info) == STT_OBJECT)
4926 {
4927 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4928 if (htab != NULL)
4929 htab->params->object_in_toc = 1;
4930 }
4931
4932 if ((STO_PPC64_LOCAL_MASK & isym->st_other) != 0)
4933 {
4934 if (abiversion (ibfd) == 0)
4935 set_abiversion (ibfd, 2);
4936 else if (abiversion (ibfd) == 1)
4937 {
4938 info->callbacks->einfo (_("%P: symbol '%s' has invalid st_other"
4939 " for ABI version 1\n"), name);
4940 bfd_set_error (bfd_error_bad_value);
4941 return FALSE;
4942 }
4943 }
4944
4945 return TRUE;
4946 }
4947
4948 /* Merge non-visibility st_other attributes: local entry point. */
4949
4950 static void
4951 ppc64_elf_merge_symbol_attribute (struct elf_link_hash_entry *h,
4952 const Elf_Internal_Sym *isym,
4953 bfd_boolean definition,
4954 bfd_boolean dynamic)
4955 {
4956 if (definition && !dynamic)
4957 h->other = ((isym->st_other & ~ELF_ST_VISIBILITY (-1))
4958 | ELF_ST_VISIBILITY (h->other));
4959 }
4960
4961 /* This function makes an old ABI object reference to ".bar" cause the
4962 inclusion of a new ABI object archive that defines "bar".
4963 NAME is a symbol defined in an archive. Return a symbol in the hash
4964 table that might be satisfied by the archive symbols. */
4965
4966 static struct elf_link_hash_entry *
4967 ppc64_elf_archive_symbol_lookup (bfd *abfd,
4968 struct bfd_link_info *info,
4969 const char *name)
4970 {
4971 struct elf_link_hash_entry *h;
4972 char *dot_name;
4973 size_t len;
4974
4975 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
4976 if (h != NULL
4977 /* Don't return this sym if it is a fake function descriptor
4978 created by add_symbol_adjust. */
4979 && !(h->root.type == bfd_link_hash_undefweak
4980 && ((struct ppc_link_hash_entry *) h)->fake))
4981 return h;
4982
4983 if (name[0] == '.')
4984 return h;
4985
4986 len = strlen (name);
4987 dot_name = bfd_alloc (abfd, len + 2);
4988 if (dot_name == NULL)
4989 return (struct elf_link_hash_entry *) 0 - 1;
4990 dot_name[0] = '.';
4991 memcpy (dot_name + 1, name, len + 1);
4992 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
4993 bfd_release (abfd, dot_name);
4994 return h;
4995 }
4996
4997 /* This function satisfies all old ABI object references to ".bar" if a
4998 new ABI object defines "bar". Well, at least, undefined dot symbols
4999 are made weak. This stops later archive searches from including an
5000 object if we already have a function descriptor definition. It also
5001 prevents the linker complaining about undefined symbols.
5002 We also check and correct mismatched symbol visibility here. The
5003 most restrictive visibility of the function descriptor and the
5004 function entry symbol is used. */
5005
5006 static bfd_boolean
5007 add_symbol_adjust (struct ppc_link_hash_entry *eh, struct bfd_link_info *info)
5008 {
5009 struct ppc_link_hash_table *htab;
5010 struct ppc_link_hash_entry *fdh;
5011
5012 if (eh->elf.root.type == bfd_link_hash_indirect)
5013 return TRUE;
5014
5015 if (eh->elf.root.type == bfd_link_hash_warning)
5016 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
5017
5018 if (eh->elf.root.root.string[0] != '.')
5019 abort ();
5020
5021 htab = ppc_hash_table (info);
5022 if (htab == NULL)
5023 return FALSE;
5024
5025 fdh = lookup_fdh (eh, htab);
5026 if (fdh == NULL)
5027 {
5028 if (!bfd_link_relocatable (info)
5029 && (eh->elf.root.type == bfd_link_hash_undefined
5030 || eh->elf.root.type == bfd_link_hash_undefweak)
5031 && eh->elf.ref_regular)
5032 {
5033 /* Make an undefweak function descriptor sym, which is enough to
5034 pull in an --as-needed shared lib, but won't cause link
5035 errors. Archives are handled elsewhere. */
5036 fdh = make_fdh (info, eh);
5037 if (fdh == NULL)
5038 return FALSE;
5039 fdh->elf.ref_regular = 1;
5040 }
5041 }
5042 else
5043 {
5044 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
5045 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
5046 if (entry_vis < descr_vis)
5047 fdh->elf.other += entry_vis - descr_vis;
5048 else if (entry_vis > descr_vis)
5049 eh->elf.other += descr_vis - entry_vis;
5050
5051 if ((fdh->elf.root.type == bfd_link_hash_defined
5052 || fdh->elf.root.type == bfd_link_hash_defweak)
5053 && eh->elf.root.type == bfd_link_hash_undefined)
5054 {
5055 eh->elf.root.type = bfd_link_hash_undefweak;
5056 eh->was_undefined = 1;
5057 htab->twiddled_syms = 1;
5058 }
5059 }
5060
5061 return TRUE;
5062 }
5063
5064 /* Set up opd section info and abiversion for IBFD, and process list
5065 of dot-symbols we made in link_hash_newfunc. */
5066
5067 static bfd_boolean
5068 ppc64_elf_before_check_relocs (bfd *ibfd, struct bfd_link_info *info)
5069 {
5070 struct ppc_link_hash_table *htab;
5071 struct ppc_link_hash_entry **p, *eh;
5072 asection *opd = bfd_get_section_by_name (ibfd, ".opd");
5073
5074 if (opd != NULL && opd->size != 0)
5075 {
5076 if (abiversion (ibfd) == 0)
5077 set_abiversion (ibfd, 1);
5078 else if (abiversion (ibfd) == 2)
5079 {
5080 info->callbacks->einfo (_("%P: %B .opd not allowed in ABI"
5081 " version %d\n"),
5082 ibfd, abiversion (ibfd));
5083 bfd_set_error (bfd_error_bad_value);
5084 return FALSE;
5085 }
5086
5087 if ((ibfd->flags & DYNAMIC) == 0
5088 && (opd->flags & SEC_RELOC) != 0
5089 && opd->reloc_count != 0
5090 && !bfd_is_abs_section (opd->output_section))
5091 {
5092 /* Garbage collection needs some extra help with .opd sections.
5093 We don't want to necessarily keep everything referenced by
5094 relocs in .opd, as that would keep all functions. Instead,
5095 if we reference an .opd symbol (a function descriptor), we
5096 want to keep the function code symbol's section. This is
5097 easy for global symbols, but for local syms we need to keep
5098 information about the associated function section. */
5099 bfd_size_type amt;
5100 asection **opd_sym_map;
5101
5102 amt = OPD_NDX (opd->size) * sizeof (*opd_sym_map);
5103 opd_sym_map = bfd_zalloc (ibfd, amt);
5104 if (opd_sym_map == NULL)
5105 return FALSE;
5106 ppc64_elf_section_data (opd)->u.opd.func_sec = opd_sym_map;
5107 BFD_ASSERT (ppc64_elf_section_data (opd)->sec_type == sec_normal);
5108 ppc64_elf_section_data (opd)->sec_type = sec_opd;
5109 }
5110 }
5111
5112 if (!is_ppc64_elf (info->output_bfd))
5113 return TRUE;
5114 htab = ppc_hash_table (info);
5115 if (htab == NULL)
5116 return FALSE;
5117
5118 /* For input files without an explicit abiversion in e_flags
5119 we should have flagged any with symbol st_other bits set
5120 as ELFv1 and above flagged those with .opd as ELFv2.
5121 Set the output abiversion if not yet set, and for any input
5122 still ambiguous, take its abiversion from the output.
5123 Differences in ABI are reported later. */
5124 if (abiversion (info->output_bfd) == 0)
5125 set_abiversion (info->output_bfd, abiversion (ibfd));
5126 else if (abiversion (ibfd) == 0)
5127 set_abiversion (ibfd, abiversion (info->output_bfd));
5128
5129 p = &htab->dot_syms;
5130 while ((eh = *p) != NULL)
5131 {
5132 *p = NULL;
5133 if (&eh->elf == htab->elf.hgot)
5134 ;
5135 else if (htab->elf.hgot == NULL
5136 && strcmp (eh->elf.root.root.string, ".TOC.") == 0)
5137 htab->elf.hgot = &eh->elf;
5138 else if (!add_symbol_adjust (eh, info))
5139 return FALSE;
5140 p = &eh->u.next_dot_sym;
5141 }
5142
5143 /* Clear the list for non-ppc64 input files. */
5144 p = &htab->dot_syms;
5145 while ((eh = *p) != NULL)
5146 {
5147 *p = NULL;
5148 p = &eh->u.next_dot_sym;
5149 }
5150
5151 /* We need to fix the undefs list for any syms we have twiddled to
5152 undef_weak. */
5153 if (htab->twiddled_syms)
5154 {
5155 bfd_link_repair_undef_list (&htab->elf.root);
5156 htab->twiddled_syms = 0;
5157 }
5158 return TRUE;
5159 }
5160
5161 /* Undo hash table changes when an --as-needed input file is determined
5162 not to be needed. */
5163
5164 static bfd_boolean
5165 ppc64_elf_notice_as_needed (bfd *ibfd,
5166 struct bfd_link_info *info,
5167 enum notice_asneeded_action act)
5168 {
5169 if (act == notice_not_needed)
5170 {
5171 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5172
5173 if (htab == NULL)
5174 return FALSE;
5175
5176 htab->dot_syms = NULL;
5177 }
5178 return _bfd_elf_notice_as_needed (ibfd, info, act);
5179 }
5180
5181 /* If --just-symbols against a final linked binary, then assume we need
5182 toc adjusting stubs when calling functions defined there. */
5183
5184 static void
5185 ppc64_elf_link_just_syms (asection *sec, struct bfd_link_info *info)
5186 {
5187 if ((sec->flags & SEC_CODE) != 0
5188 && (sec->owner->flags & (EXEC_P | DYNAMIC)) != 0
5189 && is_ppc64_elf (sec->owner))
5190 {
5191 if (abiversion (sec->owner) >= 2
5192 || bfd_get_section_by_name (sec->owner, ".opd") != NULL)
5193 sec->has_toc_reloc = 1;
5194 }
5195 _bfd_elf_link_just_syms (sec, info);
5196 }
5197
5198 static struct plt_entry **
5199 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
5200 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
5201 {
5202 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
5203 struct plt_entry **local_plt;
5204 unsigned char *local_got_tls_masks;
5205
5206 if (local_got_ents == NULL)
5207 {
5208 bfd_size_type size = symtab_hdr->sh_info;
5209
5210 size *= (sizeof (*local_got_ents)
5211 + sizeof (*local_plt)
5212 + sizeof (*local_got_tls_masks));
5213 local_got_ents = bfd_zalloc (abfd, size);
5214 if (local_got_ents == NULL)
5215 return NULL;
5216 elf_local_got_ents (abfd) = local_got_ents;
5217 }
5218
5219 if ((tls_type & (PLT_IFUNC | TLS_EXPLICIT)) == 0)
5220 {
5221 struct got_entry *ent;
5222
5223 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
5224 if (ent->addend == r_addend
5225 && ent->owner == abfd
5226 && ent->tls_type == tls_type)
5227 break;
5228 if (ent == NULL)
5229 {
5230 bfd_size_type amt = sizeof (*ent);
5231 ent = bfd_alloc (abfd, amt);
5232 if (ent == NULL)
5233 return FALSE;
5234 ent->next = local_got_ents[r_symndx];
5235 ent->addend = r_addend;
5236 ent->owner = abfd;
5237 ent->tls_type = tls_type;
5238 ent->is_indirect = FALSE;
5239 ent->got.refcount = 0;
5240 local_got_ents[r_symndx] = ent;
5241 }
5242 ent->got.refcount += 1;
5243 }
5244
5245 local_plt = (struct plt_entry **) (local_got_ents + symtab_hdr->sh_info);
5246 local_got_tls_masks = (unsigned char *) (local_plt + symtab_hdr->sh_info);
5247 local_got_tls_masks[r_symndx] |= tls_type;
5248
5249 return local_plt + r_symndx;
5250 }
5251
5252 static bfd_boolean
5253 update_plt_info (bfd *abfd, struct plt_entry **plist, bfd_vma addend)
5254 {
5255 struct plt_entry *ent;
5256
5257 for (ent = *plist; ent != NULL; ent = ent->next)
5258 if (ent->addend == addend)
5259 break;
5260 if (ent == NULL)
5261 {
5262 bfd_size_type amt = sizeof (*ent);
5263 ent = bfd_alloc (abfd, amt);
5264 if (ent == NULL)
5265 return FALSE;
5266 ent->next = *plist;
5267 ent->addend = addend;
5268 ent->plt.refcount = 0;
5269 *plist = ent;
5270 }
5271 ent->plt.refcount += 1;
5272 return TRUE;
5273 }
5274
5275 static bfd_boolean
5276 is_branch_reloc (enum elf_ppc64_reloc_type r_type)
5277 {
5278 return (r_type == R_PPC64_REL24
5279 || r_type == R_PPC64_REL14
5280 || r_type == R_PPC64_REL14_BRTAKEN
5281 || r_type == R_PPC64_REL14_BRNTAKEN
5282 || r_type == R_PPC64_ADDR24
5283 || r_type == R_PPC64_ADDR14
5284 || r_type == R_PPC64_ADDR14_BRTAKEN
5285 || r_type == R_PPC64_ADDR14_BRNTAKEN);
5286 }
5287
5288 /* Look through the relocs for a section during the first phase, and
5289 calculate needed space in the global offset table, procedure
5290 linkage table, and dynamic reloc sections. */
5291
5292 static bfd_boolean
5293 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
5294 asection *sec, const Elf_Internal_Rela *relocs)
5295 {
5296 struct ppc_link_hash_table *htab;
5297 Elf_Internal_Shdr *symtab_hdr;
5298 struct elf_link_hash_entry **sym_hashes;
5299 const Elf_Internal_Rela *rel;
5300 const Elf_Internal_Rela *rel_end;
5301 asection *sreloc;
5302 asection **opd_sym_map;
5303 struct elf_link_hash_entry *tga, *dottga;
5304
5305 if (bfd_link_relocatable (info))
5306 return TRUE;
5307
5308 /* Don't do anything special with non-loaded, non-alloced sections.
5309 In particular, any relocs in such sections should not affect GOT
5310 and PLT reference counting (ie. we don't allow them to create GOT
5311 or PLT entries), there's no possibility or desire to optimize TLS
5312 relocs, and there's not much point in propagating relocs to shared
5313 libs that the dynamic linker won't relocate. */
5314 if ((sec->flags & SEC_ALLOC) == 0)
5315 return TRUE;
5316
5317 BFD_ASSERT (is_ppc64_elf (abfd));
5318
5319 htab = ppc_hash_table (info);
5320 if (htab == NULL)
5321 return FALSE;
5322
5323 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
5324 FALSE, FALSE, TRUE);
5325 dottga = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
5326 FALSE, FALSE, TRUE);
5327 symtab_hdr = &elf_symtab_hdr (abfd);
5328 sym_hashes = elf_sym_hashes (abfd);
5329 sreloc = NULL;
5330 opd_sym_map = NULL;
5331 if (ppc64_elf_section_data (sec) != NULL
5332 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
5333 opd_sym_map = ppc64_elf_section_data (sec)->u.opd.func_sec;
5334
5335 rel_end = relocs + sec->reloc_count;
5336 for (rel = relocs; rel < rel_end; rel++)
5337 {
5338 unsigned long r_symndx;
5339 struct elf_link_hash_entry *h;
5340 enum elf_ppc64_reloc_type r_type;
5341 int tls_type;
5342 struct _ppc64_elf_section_data *ppc64_sec;
5343 struct plt_entry **ifunc, **plt_list;
5344
5345 r_symndx = ELF64_R_SYM (rel->r_info);
5346 if (r_symndx < symtab_hdr->sh_info)
5347 h = NULL;
5348 else
5349 {
5350 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5351 h = elf_follow_link (h);
5352
5353 /* PR15323, ref flags aren't set for references in the same
5354 object. */
5355 h->root.non_ir_ref = 1;
5356
5357 if (h == htab->elf.hgot)
5358 sec->has_toc_reloc = 1;
5359 }
5360
5361 tls_type = 0;
5362 ifunc = NULL;
5363 if (h != NULL)
5364 {
5365 if (h->type == STT_GNU_IFUNC)
5366 {
5367 h->needs_plt = 1;
5368 ifunc = &h->plt.plist;
5369 }
5370 }
5371 else
5372 {
5373 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5374 abfd, r_symndx);
5375 if (isym == NULL)
5376 return FALSE;
5377
5378 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
5379 {
5380 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
5381 rel->r_addend, PLT_IFUNC);
5382 if (ifunc == NULL)
5383 return FALSE;
5384 }
5385 }
5386
5387 r_type = ELF64_R_TYPE (rel->r_info);
5388 switch (r_type)
5389 {
5390 case R_PPC64_TLSGD:
5391 case R_PPC64_TLSLD:
5392 /* These special tls relocs tie a call to __tls_get_addr with
5393 its parameter symbol. */
5394 break;
5395
5396 case R_PPC64_GOT_TLSLD16:
5397 case R_PPC64_GOT_TLSLD16_LO:
5398 case R_PPC64_GOT_TLSLD16_HI:
5399 case R_PPC64_GOT_TLSLD16_HA:
5400 tls_type = TLS_TLS | TLS_LD;
5401 goto dogottls;
5402
5403 case R_PPC64_GOT_TLSGD16:
5404 case R_PPC64_GOT_TLSGD16_LO:
5405 case R_PPC64_GOT_TLSGD16_HI:
5406 case R_PPC64_GOT_TLSGD16_HA:
5407 tls_type = TLS_TLS | TLS_GD;
5408 goto dogottls;
5409
5410 case R_PPC64_GOT_TPREL16_DS:
5411 case R_PPC64_GOT_TPREL16_LO_DS:
5412 case R_PPC64_GOT_TPREL16_HI:
5413 case R_PPC64_GOT_TPREL16_HA:
5414 if (bfd_link_pic (info))
5415 info->flags |= DF_STATIC_TLS;
5416 tls_type = TLS_TLS | TLS_TPREL;
5417 goto dogottls;
5418
5419 case R_PPC64_GOT_DTPREL16_DS:
5420 case R_PPC64_GOT_DTPREL16_LO_DS:
5421 case R_PPC64_GOT_DTPREL16_HI:
5422 case R_PPC64_GOT_DTPREL16_HA:
5423 tls_type = TLS_TLS | TLS_DTPREL;
5424 dogottls:
5425 sec->has_tls_reloc = 1;
5426 /* Fall thru */
5427
5428 case R_PPC64_GOT16:
5429 case R_PPC64_GOT16_DS:
5430 case R_PPC64_GOT16_HA:
5431 case R_PPC64_GOT16_HI:
5432 case R_PPC64_GOT16_LO:
5433 case R_PPC64_GOT16_LO_DS:
5434 /* This symbol requires a global offset table entry. */
5435 sec->has_toc_reloc = 1;
5436 if (r_type == R_PPC64_GOT_TLSLD16
5437 || r_type == R_PPC64_GOT_TLSGD16
5438 || r_type == R_PPC64_GOT_TPREL16_DS
5439 || r_type == R_PPC64_GOT_DTPREL16_DS
5440 || r_type == R_PPC64_GOT16
5441 || r_type == R_PPC64_GOT16_DS)
5442 {
5443 htab->do_multi_toc = 1;
5444 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5445 }
5446
5447 if (ppc64_elf_tdata (abfd)->got == NULL
5448 && !create_got_section (abfd, info))
5449 return FALSE;
5450
5451 if (h != NULL)
5452 {
5453 struct ppc_link_hash_entry *eh;
5454 struct got_entry *ent;
5455
5456 eh = (struct ppc_link_hash_entry *) h;
5457 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
5458 if (ent->addend == rel->r_addend
5459 && ent->owner == abfd
5460 && ent->tls_type == tls_type)
5461 break;
5462 if (ent == NULL)
5463 {
5464 bfd_size_type amt = sizeof (*ent);
5465 ent = bfd_alloc (abfd, amt);
5466 if (ent == NULL)
5467 return FALSE;
5468 ent->next = eh->elf.got.glist;
5469 ent->addend = rel->r_addend;
5470 ent->owner = abfd;
5471 ent->tls_type = tls_type;
5472 ent->is_indirect = FALSE;
5473 ent->got.refcount = 0;
5474 eh->elf.got.glist = ent;
5475 }
5476 ent->got.refcount += 1;
5477 eh->tls_mask |= tls_type;
5478 }
5479 else
5480 /* This is a global offset table entry for a local symbol. */
5481 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5482 rel->r_addend, tls_type))
5483 return FALSE;
5484
5485 /* We may also need a plt entry if the symbol turns out to be
5486 an ifunc. */
5487 if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1)
5488 {
5489 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5490 return FALSE;
5491 }
5492 break;
5493
5494 case R_PPC64_PLT16_HA:
5495 case R_PPC64_PLT16_HI:
5496 case R_PPC64_PLT16_LO:
5497 case R_PPC64_PLT32:
5498 case R_PPC64_PLT64:
5499 /* This symbol requires a procedure linkage table entry. */
5500 plt_list = ifunc;
5501 if (h != NULL)
5502 {
5503 h->needs_plt = 1;
5504 if (h->root.root.string[0] == '.'
5505 && h->root.root.string[1] != '\0')
5506 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5507 plt_list = &h->plt.plist;
5508 }
5509 if (plt_list == NULL)
5510 {
5511 /* It does not make sense to have a procedure linkage
5512 table entry for a non-ifunc local symbol. */
5513 info->callbacks->einfo
5514 (_("%P: %H: %s reloc against local symbol\n"),
5515 abfd, sec, rel->r_offset,
5516 ppc64_elf_howto_table[r_type]->name);
5517 bfd_set_error (bfd_error_bad_value);
5518 return FALSE;
5519 }
5520 if (!update_plt_info (abfd, plt_list, rel->r_addend))
5521 return FALSE;
5522 break;
5523
5524 /* The following relocations don't need to propagate the
5525 relocation if linking a shared object since they are
5526 section relative. */
5527 case R_PPC64_SECTOFF:
5528 case R_PPC64_SECTOFF_LO:
5529 case R_PPC64_SECTOFF_HI:
5530 case R_PPC64_SECTOFF_HA:
5531 case R_PPC64_SECTOFF_DS:
5532 case R_PPC64_SECTOFF_LO_DS:
5533 case R_PPC64_DTPREL16:
5534 case R_PPC64_DTPREL16_LO:
5535 case R_PPC64_DTPREL16_HI:
5536 case R_PPC64_DTPREL16_HA:
5537 case R_PPC64_DTPREL16_DS:
5538 case R_PPC64_DTPREL16_LO_DS:
5539 case R_PPC64_DTPREL16_HIGH:
5540 case R_PPC64_DTPREL16_HIGHA:
5541 case R_PPC64_DTPREL16_HIGHER:
5542 case R_PPC64_DTPREL16_HIGHERA:
5543 case R_PPC64_DTPREL16_HIGHEST:
5544 case R_PPC64_DTPREL16_HIGHESTA:
5545 break;
5546
5547 /* Nor do these. */
5548 case R_PPC64_REL16:
5549 case R_PPC64_REL16_LO:
5550 case R_PPC64_REL16_HI:
5551 case R_PPC64_REL16_HA:
5552 case R_PPC64_REL16DX_HA:
5553 break;
5554
5555 /* Not supported as a dynamic relocation. */
5556 case R_PPC64_ADDR64_LOCAL:
5557 if (bfd_link_pic (info))
5558 {
5559 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
5560 ppc_howto_init ();
5561 info->callbacks->einfo (_("%P: %H: %s reloc unsupported "
5562 "in shared libraries and PIEs.\n"),
5563 abfd, sec, rel->r_offset,
5564 ppc64_elf_howto_table[r_type]->name);
5565 bfd_set_error (bfd_error_bad_value);
5566 return FALSE;
5567 }
5568 break;
5569
5570 case R_PPC64_TOC16:
5571 case R_PPC64_TOC16_DS:
5572 htab->do_multi_toc = 1;
5573 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5574 case R_PPC64_TOC16_LO:
5575 case R_PPC64_TOC16_HI:
5576 case R_PPC64_TOC16_HA:
5577 case R_PPC64_TOC16_LO_DS:
5578 sec->has_toc_reloc = 1;
5579 break;
5580
5581 /* Marker reloc. */
5582 case R_PPC64_ENTRY:
5583 break;
5584
5585 /* This relocation describes the C++ object vtable hierarchy.
5586 Reconstruct it for later use during GC. */
5587 case R_PPC64_GNU_VTINHERIT:
5588 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
5589 return FALSE;
5590 break;
5591
5592 /* This relocation describes which C++ vtable entries are actually
5593 used. Record for later use during GC. */
5594 case R_PPC64_GNU_VTENTRY:
5595 BFD_ASSERT (h != NULL);
5596 if (h != NULL
5597 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
5598 return FALSE;
5599 break;
5600
5601 case R_PPC64_REL14:
5602 case R_PPC64_REL14_BRTAKEN:
5603 case R_PPC64_REL14_BRNTAKEN:
5604 {
5605 asection *dest = NULL;
5606
5607 /* Heuristic: If jumping outside our section, chances are
5608 we are going to need a stub. */
5609 if (h != NULL)
5610 {
5611 /* If the sym is weak it may be overridden later, so
5612 don't assume we know where a weak sym lives. */
5613 if (h->root.type == bfd_link_hash_defined)
5614 dest = h->root.u.def.section;
5615 }
5616 else
5617 {
5618 Elf_Internal_Sym *isym;
5619
5620 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5621 abfd, r_symndx);
5622 if (isym == NULL)
5623 return FALSE;
5624
5625 dest = bfd_section_from_elf_index (abfd, isym->st_shndx);
5626 }
5627
5628 if (dest != sec)
5629 ppc64_elf_section_data (sec)->has_14bit_branch = 1;
5630 }
5631 /* Fall through. */
5632
5633 case R_PPC64_REL24:
5634 plt_list = ifunc;
5635 if (h != NULL)
5636 {
5637 h->needs_plt = 1;
5638 if (h->root.root.string[0] == '.'
5639 && h->root.root.string[1] != '\0')
5640 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5641
5642 if (h == tga || h == dottga)
5643 {
5644 sec->has_tls_reloc = 1;
5645 if (rel != relocs
5646 && (ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSGD
5647 || ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSLD))
5648 /* We have a new-style __tls_get_addr call with
5649 a marker reloc. */
5650 ;
5651 else
5652 /* Mark this section as having an old-style call. */
5653 sec->has_tls_get_addr_call = 1;
5654 }
5655 plt_list = &h->plt.plist;
5656 }
5657
5658 /* We may need a .plt entry if the function this reloc
5659 refers to is in a shared lib. */
5660 if (plt_list
5661 && !update_plt_info (abfd, plt_list, rel->r_addend))
5662 return FALSE;
5663 break;
5664
5665 case R_PPC64_ADDR14:
5666 case R_PPC64_ADDR14_BRNTAKEN:
5667 case R_PPC64_ADDR14_BRTAKEN:
5668 case R_PPC64_ADDR24:
5669 goto dodyn;
5670
5671 case R_PPC64_TPREL64:
5672 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
5673 if (bfd_link_pic (info))
5674 info->flags |= DF_STATIC_TLS;
5675 goto dotlstoc;
5676
5677 case R_PPC64_DTPMOD64:
5678 if (rel + 1 < rel_end
5679 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
5680 && rel[1].r_offset == rel->r_offset + 8)
5681 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
5682 else
5683 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
5684 goto dotlstoc;
5685
5686 case R_PPC64_DTPREL64:
5687 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
5688 if (rel != relocs
5689 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
5690 && rel[-1].r_offset == rel->r_offset - 8)
5691 /* This is the second reloc of a dtpmod, dtprel pair.
5692 Don't mark with TLS_DTPREL. */
5693 goto dodyn;
5694
5695 dotlstoc:
5696 sec->has_tls_reloc = 1;
5697 if (h != NULL)
5698 {
5699 struct ppc_link_hash_entry *eh;
5700 eh = (struct ppc_link_hash_entry *) h;
5701 eh->tls_mask |= tls_type;
5702 }
5703 else
5704 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5705 rel->r_addend, tls_type))
5706 return FALSE;
5707
5708 ppc64_sec = ppc64_elf_section_data (sec);
5709 if (ppc64_sec->sec_type != sec_toc)
5710 {
5711 bfd_size_type amt;
5712
5713 /* One extra to simplify get_tls_mask. */
5714 amt = sec->size * sizeof (unsigned) / 8 + sizeof (unsigned);
5715 ppc64_sec->u.toc.symndx = bfd_zalloc (abfd, amt);
5716 if (ppc64_sec->u.toc.symndx == NULL)
5717 return FALSE;
5718 amt = sec->size * sizeof (bfd_vma) / 8;
5719 ppc64_sec->u.toc.add = bfd_zalloc (abfd, amt);
5720 if (ppc64_sec->u.toc.add == NULL)
5721 return FALSE;
5722 BFD_ASSERT (ppc64_sec->sec_type == sec_normal);
5723 ppc64_sec->sec_type = sec_toc;
5724 }
5725 BFD_ASSERT (rel->r_offset % 8 == 0);
5726 ppc64_sec->u.toc.symndx[rel->r_offset / 8] = r_symndx;
5727 ppc64_sec->u.toc.add[rel->r_offset / 8] = rel->r_addend;
5728
5729 /* Mark the second slot of a GD or LD entry.
5730 -1 to indicate GD and -2 to indicate LD. */
5731 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
5732 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -1;
5733 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
5734 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -2;
5735 goto dodyn;
5736
5737 case R_PPC64_TPREL16:
5738 case R_PPC64_TPREL16_LO:
5739 case R_PPC64_TPREL16_HI:
5740 case R_PPC64_TPREL16_HA:
5741 case R_PPC64_TPREL16_DS:
5742 case R_PPC64_TPREL16_LO_DS:
5743 case R_PPC64_TPREL16_HIGH:
5744 case R_PPC64_TPREL16_HIGHA:
5745 case R_PPC64_TPREL16_HIGHER:
5746 case R_PPC64_TPREL16_HIGHERA:
5747 case R_PPC64_TPREL16_HIGHEST:
5748 case R_PPC64_TPREL16_HIGHESTA:
5749 if (bfd_link_pic (info))
5750 {
5751 info->flags |= DF_STATIC_TLS;
5752 goto dodyn;
5753 }
5754 break;
5755
5756 case R_PPC64_ADDR64:
5757 if (opd_sym_map != NULL
5758 && rel + 1 < rel_end
5759 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
5760 {
5761 if (h != NULL)
5762 {
5763 if (h->root.root.string[0] == '.'
5764 && h->root.root.string[1] != 0
5765 && lookup_fdh ((struct ppc_link_hash_entry *) h, htab))
5766 ;
5767 else
5768 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5769 }
5770 else
5771 {
5772 asection *s;
5773 Elf_Internal_Sym *isym;
5774
5775 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5776 abfd, r_symndx);
5777 if (isym == NULL)
5778 return FALSE;
5779
5780 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5781 if (s != NULL && s != sec)
5782 opd_sym_map[OPD_NDX (rel->r_offset)] = s;
5783 }
5784 }
5785 /* Fall through. */
5786
5787 case R_PPC64_ADDR16:
5788 case R_PPC64_ADDR16_DS:
5789 case R_PPC64_ADDR16_HA:
5790 case R_PPC64_ADDR16_HI:
5791 case R_PPC64_ADDR16_HIGH:
5792 case R_PPC64_ADDR16_HIGHA:
5793 case R_PPC64_ADDR16_HIGHER:
5794 case R_PPC64_ADDR16_HIGHERA:
5795 case R_PPC64_ADDR16_HIGHEST:
5796 case R_PPC64_ADDR16_HIGHESTA:
5797 case R_PPC64_ADDR16_LO:
5798 case R_PPC64_ADDR16_LO_DS:
5799 if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1
5800 && rel->r_addend == 0)
5801 {
5802 /* We may need a .plt entry if this reloc refers to a
5803 function in a shared lib. */
5804 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5805 return FALSE;
5806 h->pointer_equality_needed = 1;
5807 }
5808 /* Fall through. */
5809
5810 case R_PPC64_REL30:
5811 case R_PPC64_REL32:
5812 case R_PPC64_REL64:
5813 case R_PPC64_ADDR32:
5814 case R_PPC64_UADDR16:
5815 case R_PPC64_UADDR32:
5816 case R_PPC64_UADDR64:
5817 case R_PPC64_TOC:
5818 if (h != NULL && !bfd_link_pic (info))
5819 /* We may need a copy reloc. */
5820 h->non_got_ref = 1;
5821
5822 /* Don't propagate .opd relocs. */
5823 if (NO_OPD_RELOCS && opd_sym_map != NULL)
5824 break;
5825
5826 /* If we are creating a shared library, and this is a reloc
5827 against a global symbol, or a non PC relative reloc
5828 against a local symbol, then we need to copy the reloc
5829 into the shared library. However, if we are linking with
5830 -Bsymbolic, we do not need to copy a reloc against a
5831 global symbol which is defined in an object we are
5832 including in the link (i.e., DEF_REGULAR is set). At
5833 this point we have not seen all the input files, so it is
5834 possible that DEF_REGULAR is not set now but will be set
5835 later (it is never cleared). In case of a weak definition,
5836 DEF_REGULAR may be cleared later by a strong definition in
5837 a shared library. We account for that possibility below by
5838 storing information in the dyn_relocs field of the hash
5839 table entry. A similar situation occurs when creating
5840 shared libraries and symbol visibility changes render the
5841 symbol local.
5842
5843 If on the other hand, we are creating an executable, we
5844 may need to keep relocations for symbols satisfied by a
5845 dynamic library if we manage to avoid copy relocs for the
5846 symbol. */
5847 dodyn:
5848 if ((bfd_link_pic (info)
5849 && (must_be_dyn_reloc (info, r_type)
5850 || (h != NULL
5851 && (!SYMBOLIC_BIND (info, h)
5852 || h->root.type == bfd_link_hash_defweak
5853 || !h->def_regular))))
5854 || (ELIMINATE_COPY_RELOCS
5855 && !bfd_link_pic (info)
5856 && h != NULL
5857 && (h->root.type == bfd_link_hash_defweak
5858 || !h->def_regular))
5859 || (!bfd_link_pic (info)
5860 && ifunc != NULL))
5861 {
5862 /* We must copy these reloc types into the output file.
5863 Create a reloc section in dynobj and make room for
5864 this reloc. */
5865 if (sreloc == NULL)
5866 {
5867 sreloc = _bfd_elf_make_dynamic_reloc_section
5868 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
5869
5870 if (sreloc == NULL)
5871 return FALSE;
5872 }
5873
5874 /* If this is a global symbol, we count the number of
5875 relocations we need for this symbol. */
5876 if (h != NULL)
5877 {
5878 struct elf_dyn_relocs *p;
5879 struct elf_dyn_relocs **head;
5880
5881 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
5882 p = *head;
5883 if (p == NULL || p->sec != sec)
5884 {
5885 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5886 if (p == NULL)
5887 return FALSE;
5888 p->next = *head;
5889 *head = p;
5890 p->sec = sec;
5891 p->count = 0;
5892 p->pc_count = 0;
5893 }
5894 p->count += 1;
5895 if (!must_be_dyn_reloc (info, r_type))
5896 p->pc_count += 1;
5897 }
5898 else
5899 {
5900 /* Track dynamic relocs needed for local syms too.
5901 We really need local syms available to do this
5902 easily. Oh well. */
5903 struct ppc_dyn_relocs *p;
5904 struct ppc_dyn_relocs **head;
5905 bfd_boolean is_ifunc;
5906 asection *s;
5907 void *vpp;
5908 Elf_Internal_Sym *isym;
5909
5910 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5911 abfd, r_symndx);
5912 if (isym == NULL)
5913 return FALSE;
5914
5915 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5916 if (s == NULL)
5917 s = sec;
5918
5919 vpp = &elf_section_data (s)->local_dynrel;
5920 head = (struct ppc_dyn_relocs **) vpp;
5921 is_ifunc = ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC;
5922 p = *head;
5923 if (p != NULL && p->sec == sec && p->ifunc != is_ifunc)
5924 p = p->next;
5925 if (p == NULL || p->sec != sec || p->ifunc != is_ifunc)
5926 {
5927 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5928 if (p == NULL)
5929 return FALSE;
5930 p->next = *head;
5931 *head = p;
5932 p->sec = sec;
5933 p->ifunc = is_ifunc;
5934 p->count = 0;
5935 }
5936 p->count += 1;
5937 }
5938 }
5939 break;
5940
5941 default:
5942 break;
5943 }
5944 }
5945
5946 return TRUE;
5947 }
5948
5949 /* Merge backend specific data from an object file to the output
5950 object file when linking. */
5951
5952 static bfd_boolean
5953 ppc64_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
5954 {
5955 unsigned long iflags, oflags;
5956
5957 if ((ibfd->flags & BFD_LINKER_CREATED) != 0)
5958 return TRUE;
5959
5960 if (!is_ppc64_elf (ibfd) || !is_ppc64_elf (obfd))
5961 return TRUE;
5962
5963 if (!_bfd_generic_verify_endian_match (ibfd, obfd))
5964 return FALSE;
5965
5966 iflags = elf_elfheader (ibfd)->e_flags;
5967 oflags = elf_elfheader (obfd)->e_flags;
5968
5969 if (iflags & ~EF_PPC64_ABI)
5970 {
5971 (*_bfd_error_handler)
5972 (_("%B uses unknown e_flags 0x%lx"), ibfd, iflags);
5973 bfd_set_error (bfd_error_bad_value);
5974 return FALSE;
5975 }
5976 else if (iflags != oflags && iflags != 0)
5977 {
5978 (*_bfd_error_handler)
5979 (_("%B: ABI version %ld is not compatible with ABI version %ld output"),
5980 ibfd, iflags, oflags);
5981 bfd_set_error (bfd_error_bad_value);
5982 return FALSE;
5983 }
5984
5985 /* Merge Tag_compatibility attributes and any common GNU ones. */
5986 _bfd_elf_merge_object_attributes (ibfd, obfd);
5987
5988 return TRUE;
5989 }
5990
5991 static bfd_boolean
5992 ppc64_elf_print_private_bfd_data (bfd *abfd, void *ptr)
5993 {
5994 /* Print normal ELF private data. */
5995 _bfd_elf_print_private_bfd_data (abfd, ptr);
5996
5997 if (elf_elfheader (abfd)->e_flags != 0)
5998 {
5999 FILE *file = ptr;
6000
6001 /* xgettext:c-format */
6002 fprintf (file, _("private flags = 0x%lx:"),
6003 elf_elfheader (abfd)->e_flags);
6004
6005 if ((elf_elfheader (abfd)->e_flags & EF_PPC64_ABI) != 0)
6006 fprintf (file, _(" [abiv%ld]"),
6007 elf_elfheader (abfd)->e_flags & EF_PPC64_ABI);
6008 fputc ('\n', file);
6009 }
6010
6011 return TRUE;
6012 }
6013
6014 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
6015 of the code entry point, and its section, which must be in the same
6016 object as OPD_SEC. Returns (bfd_vma) -1 on error. */
6017
6018 static bfd_vma
6019 opd_entry_value (asection *opd_sec,
6020 bfd_vma offset,
6021 asection **code_sec,
6022 bfd_vma *code_off,
6023 bfd_boolean in_code_sec)
6024 {
6025 bfd *opd_bfd = opd_sec->owner;
6026 Elf_Internal_Rela *relocs;
6027 Elf_Internal_Rela *lo, *hi, *look;
6028 bfd_vma val;
6029
6030 /* No relocs implies we are linking a --just-symbols object, or looking
6031 at a final linked executable with addr2line or somesuch. */
6032 if (opd_sec->reloc_count == 0)
6033 {
6034 bfd_byte *contents = ppc64_elf_tdata (opd_bfd)->opd.contents;
6035
6036 if (contents == NULL)
6037 {
6038 if (!bfd_malloc_and_get_section (opd_bfd, opd_sec, &contents))
6039 return (bfd_vma) -1;
6040 ppc64_elf_tdata (opd_bfd)->opd.contents = contents;
6041 }
6042
6043 /* PR 17512: file: 64b9dfbb. */
6044 if (offset + 7 >= opd_sec->size || offset + 7 < offset)
6045 return (bfd_vma) -1;
6046
6047 val = bfd_get_64 (opd_bfd, contents + offset);
6048 if (code_sec != NULL)
6049 {
6050 asection *sec, *likely = NULL;
6051
6052 if (in_code_sec)
6053 {
6054 sec = *code_sec;
6055 if (sec->vma <= val
6056 && val < sec->vma + sec->size)
6057 likely = sec;
6058 else
6059 val = -1;
6060 }
6061 else
6062 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
6063 if (sec->vma <= val
6064 && (sec->flags & SEC_LOAD) != 0
6065 && (sec->flags & SEC_ALLOC) != 0)
6066 likely = sec;
6067 if (likely != NULL)
6068 {
6069 *code_sec = likely;
6070 if (code_off != NULL)
6071 *code_off = val - likely->vma;
6072 }
6073 }
6074 return val;
6075 }
6076
6077 BFD_ASSERT (is_ppc64_elf (opd_bfd));
6078
6079 relocs = ppc64_elf_tdata (opd_bfd)->opd.relocs;
6080 if (relocs == NULL)
6081 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
6082 /* PR 17512: file: df8e1fd6. */
6083 if (relocs == NULL)
6084 return (bfd_vma) -1;
6085
6086 /* Go find the opd reloc at the sym address. */
6087 lo = relocs;
6088 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
6089 val = (bfd_vma) -1;
6090 while (lo < hi)
6091 {
6092 look = lo + (hi - lo) / 2;
6093 if (look->r_offset < offset)
6094 lo = look + 1;
6095 else if (look->r_offset > offset)
6096 hi = look;
6097 else
6098 {
6099 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (opd_bfd);
6100
6101 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
6102 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
6103 {
6104 unsigned long symndx = ELF64_R_SYM (look->r_info);
6105 asection *sec = NULL;
6106
6107 if (symndx >= symtab_hdr->sh_info
6108 && elf_sym_hashes (opd_bfd) != NULL)
6109 {
6110 struct elf_link_hash_entry **sym_hashes;
6111 struct elf_link_hash_entry *rh;
6112
6113 sym_hashes = elf_sym_hashes (opd_bfd);
6114 rh = sym_hashes[symndx - symtab_hdr->sh_info];
6115 if (rh != NULL)
6116 {
6117 rh = elf_follow_link (rh);
6118 if (rh->root.type != bfd_link_hash_defined
6119 && rh->root.type != bfd_link_hash_defweak)
6120 break;
6121 if (rh->root.u.def.section->owner == opd_bfd)
6122 {
6123 val = rh->root.u.def.value;
6124 sec = rh->root.u.def.section;
6125 }
6126 }
6127 }
6128
6129 if (sec == NULL)
6130 {
6131 Elf_Internal_Sym *sym;
6132
6133 if (symndx < symtab_hdr->sh_info)
6134 {
6135 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
6136 if (sym == NULL)
6137 {
6138 size_t symcnt = symtab_hdr->sh_info;
6139 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
6140 symcnt, 0,
6141 NULL, NULL, NULL);
6142 if (sym == NULL)
6143 break;
6144 symtab_hdr->contents = (bfd_byte *) sym;
6145 }
6146 sym += symndx;
6147 }
6148 else
6149 {
6150 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
6151 1, symndx,
6152 NULL, NULL, NULL);
6153 if (sym == NULL)
6154 break;
6155 }
6156 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
6157 if (sec == NULL)
6158 break;
6159 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
6160 val = sym->st_value;
6161 }
6162
6163 val += look->r_addend;
6164 if (code_off != NULL)
6165 *code_off = val;
6166 if (code_sec != NULL)
6167 {
6168 if (in_code_sec && *code_sec != sec)
6169 return -1;
6170 else
6171 *code_sec = sec;
6172 }
6173 if (sec->output_section != NULL)
6174 val += sec->output_section->vma + sec->output_offset;
6175 }
6176 break;
6177 }
6178 }
6179
6180 return val;
6181 }
6182
6183 /* If the ELF symbol SYM might be a function in SEC, return the
6184 function size and set *CODE_OFF to the function's entry point,
6185 otherwise return zero. */
6186
6187 static bfd_size_type
6188 ppc64_elf_maybe_function_sym (const asymbol *sym, asection *sec,
6189 bfd_vma *code_off)
6190 {
6191 bfd_size_type size;
6192
6193 if ((sym->flags & (BSF_SECTION_SYM | BSF_FILE | BSF_OBJECT
6194 | BSF_THREAD_LOCAL | BSF_RELC | BSF_SRELC)) != 0)
6195 return 0;
6196
6197 size = 0;
6198 if (!(sym->flags & BSF_SYNTHETIC))
6199 size = ((elf_symbol_type *) sym)->internal_elf_sym.st_size;
6200
6201 if (strcmp (sym->section->name, ".opd") == 0)
6202 {
6203 struct _opd_sec_data *opd = get_opd_info (sym->section);
6204 bfd_vma symval = sym->value;
6205
6206 if (opd != NULL
6207 && opd->adjust != NULL
6208 && elf_section_data (sym->section)->relocs != NULL)
6209 {
6210 /* opd_entry_value will use cached relocs that have been
6211 adjusted, but with raw symbols. That means both local
6212 and global symbols need adjusting. */
6213 long adjust = opd->adjust[OPD_NDX (symval)];
6214 if (adjust == -1)
6215 return 0;
6216 symval += adjust;
6217 }
6218
6219 if (opd_entry_value (sym->section, symval,
6220 &sec, code_off, TRUE) == (bfd_vma) -1)
6221 return 0;
6222 /* An old ABI binary with dot-syms has a size of 24 on the .opd
6223 symbol. This size has nothing to do with the code size of the
6224 function, which is what we're supposed to return, but the
6225 code size isn't available without looking up the dot-sym.
6226 However, doing that would be a waste of time particularly
6227 since elf_find_function will look at the dot-sym anyway.
6228 Now, elf_find_function will keep the largest size of any
6229 function sym found at the code address of interest, so return
6230 1 here to avoid it incorrectly caching a larger function size
6231 for a small function. This does mean we return the wrong
6232 size for a new-ABI function of size 24, but all that does is
6233 disable caching for such functions. */
6234 if (size == 24)
6235 size = 1;
6236 }
6237 else
6238 {
6239 if (sym->section != sec)
6240 return 0;
6241 *code_off = sym->value;
6242 }
6243 if (size == 0)
6244 size = 1;
6245 return size;
6246 }
6247
6248 /* Return true if symbol is defined in a regular object file. */
6249
6250 static bfd_boolean
6251 is_static_defined (struct elf_link_hash_entry *h)
6252 {
6253 return ((h->root.type == bfd_link_hash_defined
6254 || h->root.type == bfd_link_hash_defweak)
6255 && h->root.u.def.section != NULL
6256 && h->root.u.def.section->output_section != NULL);
6257 }
6258
6259 /* If FDH is a function descriptor symbol, return the associated code
6260 entry symbol if it is defined. Return NULL otherwise. */
6261
6262 static struct ppc_link_hash_entry *
6263 defined_code_entry (struct ppc_link_hash_entry *fdh)
6264 {
6265 if (fdh->is_func_descriptor)
6266 {
6267 struct ppc_link_hash_entry *fh = ppc_follow_link (fdh->oh);
6268 if (fh->elf.root.type == bfd_link_hash_defined
6269 || fh->elf.root.type == bfd_link_hash_defweak)
6270 return fh;
6271 }
6272 return NULL;
6273 }
6274
6275 /* If FH is a function code entry symbol, return the associated
6276 function descriptor symbol if it is defined. Return NULL otherwise. */
6277
6278 static struct ppc_link_hash_entry *
6279 defined_func_desc (struct ppc_link_hash_entry *fh)
6280 {
6281 if (fh->oh != NULL
6282 && fh->oh->is_func_descriptor)
6283 {
6284 struct ppc_link_hash_entry *fdh = ppc_follow_link (fh->oh);
6285 if (fdh->elf.root.type == bfd_link_hash_defined
6286 || fdh->elf.root.type == bfd_link_hash_defweak)
6287 return fdh;
6288 }
6289 return NULL;
6290 }
6291
6292 /* Mark all our entry sym sections, both opd and code section. */
6293
6294 static void
6295 ppc64_elf_gc_keep (struct bfd_link_info *info)
6296 {
6297 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6298 struct bfd_sym_chain *sym;
6299
6300 if (htab == NULL)
6301 return;
6302
6303 for (sym = info->gc_sym_list; sym != NULL; sym = sym->next)
6304 {
6305 struct ppc_link_hash_entry *eh, *fh;
6306 asection *sec;
6307
6308 eh = (struct ppc_link_hash_entry *)
6309 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, TRUE);
6310 if (eh == NULL)
6311 continue;
6312 if (eh->elf.root.type != bfd_link_hash_defined
6313 && eh->elf.root.type != bfd_link_hash_defweak)
6314 continue;
6315
6316 fh = defined_code_entry (eh);
6317 if (fh != NULL)
6318 {
6319 sec = fh->elf.root.u.def.section;
6320 sec->flags |= SEC_KEEP;
6321 }
6322 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6323 && opd_entry_value (eh->elf.root.u.def.section,
6324 eh->elf.root.u.def.value,
6325 &sec, NULL, FALSE) != (bfd_vma) -1)
6326 sec->flags |= SEC_KEEP;
6327
6328 sec = eh->elf.root.u.def.section;
6329 sec->flags |= SEC_KEEP;
6330 }
6331 }
6332
6333 /* Mark sections containing dynamically referenced symbols. When
6334 building shared libraries, we must assume that any visible symbol is
6335 referenced. */
6336
6337 static bfd_boolean
6338 ppc64_elf_gc_mark_dynamic_ref (struct elf_link_hash_entry *h, void *inf)
6339 {
6340 struct bfd_link_info *info = (struct bfd_link_info *) inf;
6341 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
6342 struct ppc_link_hash_entry *fdh;
6343 struct bfd_elf_dynamic_list *d = info->dynamic_list;
6344
6345 /* Dynamic linking info is on the func descriptor sym. */
6346 fdh = defined_func_desc (eh);
6347 if (fdh != NULL)
6348 eh = fdh;
6349
6350 if ((eh->elf.root.type == bfd_link_hash_defined
6351 || eh->elf.root.type == bfd_link_hash_defweak)
6352 && (eh->elf.ref_dynamic
6353 || ((eh->elf.def_regular || ELF_COMMON_DEF_P (&eh->elf))
6354 && ELF_ST_VISIBILITY (eh->elf.other) != STV_INTERNAL
6355 && ELF_ST_VISIBILITY (eh->elf.other) != STV_HIDDEN
6356 && (!bfd_link_executable (info)
6357 || info->export_dynamic
6358 || (eh->elf.dynamic
6359 && d != NULL
6360 && (*d->match) (&d->head, NULL, eh->elf.root.root.string)))
6361 && (strchr (eh->elf.root.root.string, ELF_VER_CHR) != NULL
6362 || !bfd_hide_sym_by_version (info->version_info,
6363 eh->elf.root.root.string)))))
6364 {
6365 asection *code_sec;
6366 struct ppc_link_hash_entry *fh;
6367
6368 eh->elf.root.u.def.section->flags |= SEC_KEEP;
6369
6370 /* Function descriptor syms cause the associated
6371 function code sym section to be marked. */
6372 fh = defined_code_entry (eh);
6373 if (fh != NULL)
6374 {
6375 code_sec = fh->elf.root.u.def.section;
6376 code_sec->flags |= SEC_KEEP;
6377 }
6378 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6379 && opd_entry_value (eh->elf.root.u.def.section,
6380 eh->elf.root.u.def.value,
6381 &code_sec, NULL, FALSE) != (bfd_vma) -1)
6382 code_sec->flags |= SEC_KEEP;
6383 }
6384
6385 return TRUE;
6386 }
6387
6388 /* Return the section that should be marked against GC for a given
6389 relocation. */
6390
6391 static asection *
6392 ppc64_elf_gc_mark_hook (asection *sec,
6393 struct bfd_link_info *info,
6394 Elf_Internal_Rela *rel,
6395 struct elf_link_hash_entry *h,
6396 Elf_Internal_Sym *sym)
6397 {
6398 asection *rsec;
6399
6400 /* Syms return NULL if we're marking .opd, so we avoid marking all
6401 function sections, as all functions are referenced in .opd. */
6402 rsec = NULL;
6403 if (get_opd_info (sec) != NULL)
6404 return rsec;
6405
6406 if (h != NULL)
6407 {
6408 enum elf_ppc64_reloc_type r_type;
6409 struct ppc_link_hash_entry *eh, *fh, *fdh;
6410
6411 r_type = ELF64_R_TYPE (rel->r_info);
6412 switch (r_type)
6413 {
6414 case R_PPC64_GNU_VTINHERIT:
6415 case R_PPC64_GNU_VTENTRY:
6416 break;
6417
6418 default:
6419 switch (h->root.type)
6420 {
6421 case bfd_link_hash_defined:
6422 case bfd_link_hash_defweak:
6423 eh = (struct ppc_link_hash_entry *) h;
6424 fdh = defined_func_desc (eh);
6425 if (fdh != NULL)
6426 eh = fdh;
6427
6428 /* Function descriptor syms cause the associated
6429 function code sym section to be marked. */
6430 fh = defined_code_entry (eh);
6431 if (fh != NULL)
6432 {
6433 /* They also mark their opd section. */
6434 eh->elf.root.u.def.section->gc_mark = 1;
6435
6436 rsec = fh->elf.root.u.def.section;
6437 }
6438 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6439 && opd_entry_value (eh->elf.root.u.def.section,
6440 eh->elf.root.u.def.value,
6441 &rsec, NULL, FALSE) != (bfd_vma) -1)
6442 eh->elf.root.u.def.section->gc_mark = 1;
6443 else
6444 rsec = h->root.u.def.section;
6445 break;
6446
6447 case bfd_link_hash_common:
6448 rsec = h->root.u.c.p->section;
6449 break;
6450
6451 default:
6452 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
6453 }
6454 }
6455 }
6456 else
6457 {
6458 struct _opd_sec_data *opd;
6459
6460 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
6461 opd = get_opd_info (rsec);
6462 if (opd != NULL && opd->func_sec != NULL)
6463 {
6464 rsec->gc_mark = 1;
6465
6466 rsec = opd->func_sec[OPD_NDX (sym->st_value + rel->r_addend)];
6467 }
6468 }
6469
6470 return rsec;
6471 }
6472
6473 /* Update the .got, .plt. and dynamic reloc reference counts for the
6474 section being removed. */
6475
6476 static bfd_boolean
6477 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
6478 asection *sec, const Elf_Internal_Rela *relocs)
6479 {
6480 struct ppc_link_hash_table *htab;
6481 Elf_Internal_Shdr *symtab_hdr;
6482 struct elf_link_hash_entry **sym_hashes;
6483 struct got_entry **local_got_ents;
6484 const Elf_Internal_Rela *rel, *relend;
6485
6486 if (bfd_link_relocatable (info))
6487 return TRUE;
6488
6489 if ((sec->flags & SEC_ALLOC) == 0)
6490 return TRUE;
6491
6492 elf_section_data (sec)->local_dynrel = NULL;
6493
6494 htab = ppc_hash_table (info);
6495 if (htab == NULL)
6496 return FALSE;
6497
6498 symtab_hdr = &elf_symtab_hdr (abfd);
6499 sym_hashes = elf_sym_hashes (abfd);
6500 local_got_ents = elf_local_got_ents (abfd);
6501
6502 relend = relocs + sec->reloc_count;
6503 for (rel = relocs; rel < relend; rel++)
6504 {
6505 unsigned long r_symndx;
6506 enum elf_ppc64_reloc_type r_type;
6507 struct elf_link_hash_entry *h = NULL;
6508 struct plt_entry **plt_list;
6509 unsigned char tls_type = 0;
6510
6511 r_symndx = ELF64_R_SYM (rel->r_info);
6512 r_type = ELF64_R_TYPE (rel->r_info);
6513 if (r_symndx >= symtab_hdr->sh_info)
6514 {
6515 struct ppc_link_hash_entry *eh;
6516 struct elf_dyn_relocs **pp;
6517 struct elf_dyn_relocs *p;
6518
6519 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
6520 h = elf_follow_link (h);
6521 eh = (struct ppc_link_hash_entry *) h;
6522
6523 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
6524 if (p->sec == sec)
6525 {
6526 /* Everything must go for SEC. */
6527 *pp = p->next;
6528 break;
6529 }
6530 }
6531
6532 switch (r_type)
6533 {
6534 case R_PPC64_GOT_TLSLD16:
6535 case R_PPC64_GOT_TLSLD16_LO:
6536 case R_PPC64_GOT_TLSLD16_HI:
6537 case R_PPC64_GOT_TLSLD16_HA:
6538 tls_type = TLS_TLS | TLS_LD;
6539 goto dogot;
6540
6541 case R_PPC64_GOT_TLSGD16:
6542 case R_PPC64_GOT_TLSGD16_LO:
6543 case R_PPC64_GOT_TLSGD16_HI:
6544 case R_PPC64_GOT_TLSGD16_HA:
6545 tls_type = TLS_TLS | TLS_GD;
6546 goto dogot;
6547
6548 case R_PPC64_GOT_TPREL16_DS:
6549 case R_PPC64_GOT_TPREL16_LO_DS:
6550 case R_PPC64_GOT_TPREL16_HI:
6551 case R_PPC64_GOT_TPREL16_HA:
6552 tls_type = TLS_TLS | TLS_TPREL;
6553 goto dogot;
6554
6555 case R_PPC64_GOT_DTPREL16_DS:
6556 case R_PPC64_GOT_DTPREL16_LO_DS:
6557 case R_PPC64_GOT_DTPREL16_HI:
6558 case R_PPC64_GOT_DTPREL16_HA:
6559 tls_type = TLS_TLS | TLS_DTPREL;
6560 goto dogot;
6561
6562 case R_PPC64_GOT16:
6563 case R_PPC64_GOT16_DS:
6564 case R_PPC64_GOT16_HA:
6565 case R_PPC64_GOT16_HI:
6566 case R_PPC64_GOT16_LO:
6567 case R_PPC64_GOT16_LO_DS:
6568 dogot:
6569 {
6570 struct got_entry *ent;
6571
6572 if (h != NULL)
6573 ent = h->got.glist;
6574 else
6575 ent = local_got_ents[r_symndx];
6576
6577 for (; ent != NULL; ent = ent->next)
6578 if (ent->addend == rel->r_addend
6579 && ent->owner == abfd
6580 && ent->tls_type == tls_type)
6581 break;
6582 if (ent == NULL)
6583 abort ();
6584 if (ent->got.refcount > 0)
6585 ent->got.refcount -= 1;
6586 }
6587 break;
6588
6589 case R_PPC64_PLT16_HA:
6590 case R_PPC64_PLT16_HI:
6591 case R_PPC64_PLT16_LO:
6592 case R_PPC64_PLT32:
6593 case R_PPC64_PLT64:
6594 case R_PPC64_REL14:
6595 case R_PPC64_REL14_BRNTAKEN:
6596 case R_PPC64_REL14_BRTAKEN:
6597 case R_PPC64_REL24:
6598 plt_list = NULL;
6599 if (h != NULL)
6600 plt_list = &h->plt.plist;
6601 else if (local_got_ents != NULL)
6602 {
6603 struct plt_entry **local_plt = (struct plt_entry **)
6604 (local_got_ents + symtab_hdr->sh_info);
6605 unsigned char *local_got_tls_masks = (unsigned char *)
6606 (local_plt + symtab_hdr->sh_info);
6607 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
6608 plt_list = local_plt + r_symndx;
6609 }
6610 if (plt_list)
6611 {
6612 struct plt_entry *ent;
6613
6614 for (ent = *plt_list; ent != NULL; ent = ent->next)
6615 if (ent->addend == rel->r_addend)
6616 break;
6617 if (ent != NULL && ent->plt.refcount > 0)
6618 ent->plt.refcount -= 1;
6619 }
6620 break;
6621
6622 default:
6623 break;
6624 }
6625 }
6626 return TRUE;
6627 }
6628
6629 /* The maximum size of .sfpr. */
6630 #define SFPR_MAX (218*4)
6631
6632 struct sfpr_def_parms
6633 {
6634 const char name[12];
6635 unsigned char lo, hi;
6636 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
6637 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
6638 };
6639
6640 /* Auto-generate _save*, _rest* functions in .sfpr.
6641 If STUB_SEC is non-null, define alias symbols in STUB_SEC
6642 instead. */
6643
6644 static bfd_boolean
6645 sfpr_define (struct bfd_link_info *info,
6646 const struct sfpr_def_parms *parm,
6647 asection *stub_sec)
6648 {
6649 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6650 unsigned int i;
6651 size_t len = strlen (parm->name);
6652 bfd_boolean writing = FALSE;
6653 char sym[16];
6654
6655 if (htab == NULL)
6656 return FALSE;
6657
6658 memcpy (sym, parm->name, len);
6659 sym[len + 2] = 0;
6660
6661 for (i = parm->lo; i <= parm->hi; i++)
6662 {
6663 struct ppc_link_hash_entry *h;
6664
6665 sym[len + 0] = i / 10 + '0';
6666 sym[len + 1] = i % 10 + '0';
6667 h = (struct ppc_link_hash_entry *)
6668 elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
6669 if (stub_sec != NULL)
6670 {
6671 if (h != NULL
6672 && h->elf.root.type == bfd_link_hash_defined
6673 && h->elf.root.u.def.section == htab->sfpr)
6674 {
6675 struct elf_link_hash_entry *s;
6676 char buf[32];
6677 sprintf (buf, "%08x.%s", stub_sec->id & 0xffffffff, sym);
6678 s = elf_link_hash_lookup (&htab->elf, buf, TRUE, TRUE, FALSE);
6679 if (s == NULL)
6680 return FALSE;
6681 if (s->root.type == bfd_link_hash_new
6682 || (s->root.type = bfd_link_hash_defined
6683 && s->root.u.def.section == stub_sec))
6684 {
6685 s->root.type = bfd_link_hash_defined;
6686 s->root.u.def.section = stub_sec;
6687 s->root.u.def.value = (stub_sec->size
6688 + h->elf.root.u.def.value);
6689 s->ref_regular = 1;
6690 s->def_regular = 1;
6691 s->ref_regular_nonweak = 1;
6692 s->forced_local = 1;
6693 s->non_elf = 0;
6694 s->root.linker_def = 1;
6695 }
6696 }
6697 continue;
6698 }
6699 if (h != NULL)
6700 {
6701 h->save_res = 1;
6702 if (!h->elf.def_regular)
6703 {
6704 h->elf.root.type = bfd_link_hash_defined;
6705 h->elf.root.u.def.section = htab->sfpr;
6706 h->elf.root.u.def.value = htab->sfpr->size;
6707 h->elf.type = STT_FUNC;
6708 h->elf.def_regular = 1;
6709 _bfd_elf_link_hash_hide_symbol (info, &h->elf, TRUE);
6710 writing = TRUE;
6711 if (htab->sfpr->contents == NULL)
6712 {
6713 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
6714 if (htab->sfpr->contents == NULL)
6715 return FALSE;
6716 }
6717 }
6718 }
6719 if (writing)
6720 {
6721 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
6722 if (i != parm->hi)
6723 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
6724 else
6725 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
6726 htab->sfpr->size = p - htab->sfpr->contents;
6727 }
6728 }
6729
6730 return TRUE;
6731 }
6732
6733 static bfd_byte *
6734 savegpr0 (bfd *abfd, bfd_byte *p, int r)
6735 {
6736 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6737 return p + 4;
6738 }
6739
6740 static bfd_byte *
6741 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
6742 {
6743 p = savegpr0 (abfd, p, r);
6744 bfd_put_32 (abfd, STD_R0_0R1 + STK_LR, p);
6745 p = p + 4;
6746 bfd_put_32 (abfd, BLR, p);
6747 return p + 4;
6748 }
6749
6750 static bfd_byte *
6751 restgpr0 (bfd *abfd, bfd_byte *p, int r)
6752 {
6753 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6754 return p + 4;
6755 }
6756
6757 static bfd_byte *
6758 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
6759 {
6760 bfd_put_32 (abfd, LD_R0_0R1 + STK_LR, p);
6761 p = p + 4;
6762 p = restgpr0 (abfd, p, r);
6763 bfd_put_32 (abfd, MTLR_R0, p);
6764 p = p + 4;
6765 if (r == 29)
6766 {
6767 p = restgpr0 (abfd, p, 30);
6768 p = restgpr0 (abfd, p, 31);
6769 }
6770 bfd_put_32 (abfd, BLR, p);
6771 return p + 4;
6772 }
6773
6774 static bfd_byte *
6775 savegpr1 (bfd *abfd, bfd_byte *p, int r)
6776 {
6777 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6778 return p + 4;
6779 }
6780
6781 static bfd_byte *
6782 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
6783 {
6784 p = savegpr1 (abfd, p, r);
6785 bfd_put_32 (abfd, BLR, p);
6786 return p + 4;
6787 }
6788
6789 static bfd_byte *
6790 restgpr1 (bfd *abfd, bfd_byte *p, int r)
6791 {
6792 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6793 return p + 4;
6794 }
6795
6796 static bfd_byte *
6797 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
6798 {
6799 p = restgpr1 (abfd, p, r);
6800 bfd_put_32 (abfd, BLR, p);
6801 return p + 4;
6802 }
6803
6804 static bfd_byte *
6805 savefpr (bfd *abfd, bfd_byte *p, int r)
6806 {
6807 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6808 return p + 4;
6809 }
6810
6811 static bfd_byte *
6812 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
6813 {
6814 p = savefpr (abfd, p, r);
6815 bfd_put_32 (abfd, STD_R0_0R1 + STK_LR, p);
6816 p = p + 4;
6817 bfd_put_32 (abfd, BLR, p);
6818 return p + 4;
6819 }
6820
6821 static bfd_byte *
6822 restfpr (bfd *abfd, bfd_byte *p, int r)
6823 {
6824 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6825 return p + 4;
6826 }
6827
6828 static bfd_byte *
6829 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
6830 {
6831 bfd_put_32 (abfd, LD_R0_0R1 + STK_LR, p);
6832 p = p + 4;
6833 p = restfpr (abfd, p, r);
6834 bfd_put_32 (abfd, MTLR_R0, p);
6835 p = p + 4;
6836 if (r == 29)
6837 {
6838 p = restfpr (abfd, p, 30);
6839 p = restfpr (abfd, p, 31);
6840 }
6841 bfd_put_32 (abfd, BLR, p);
6842 return p + 4;
6843 }
6844
6845 static bfd_byte *
6846 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
6847 {
6848 p = savefpr (abfd, p, r);
6849 bfd_put_32 (abfd, BLR, p);
6850 return p + 4;
6851 }
6852
6853 static bfd_byte *
6854 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
6855 {
6856 p = restfpr (abfd, p, r);
6857 bfd_put_32 (abfd, BLR, p);
6858 return p + 4;
6859 }
6860
6861 static bfd_byte *
6862 savevr (bfd *abfd, bfd_byte *p, int r)
6863 {
6864 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6865 p = p + 4;
6866 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
6867 return p + 4;
6868 }
6869
6870 static bfd_byte *
6871 savevr_tail (bfd *abfd, bfd_byte *p, int r)
6872 {
6873 p = savevr (abfd, p, r);
6874 bfd_put_32 (abfd, BLR, p);
6875 return p + 4;
6876 }
6877
6878 static bfd_byte *
6879 restvr (bfd *abfd, bfd_byte *p, int r)
6880 {
6881 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6882 p = p + 4;
6883 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
6884 return p + 4;
6885 }
6886
6887 static bfd_byte *
6888 restvr_tail (bfd *abfd, bfd_byte *p, int r)
6889 {
6890 p = restvr (abfd, p, r);
6891 bfd_put_32 (abfd, BLR, p);
6892 return p + 4;
6893 }
6894
6895 /* Called via elf_link_hash_traverse to transfer dynamic linking
6896 information on function code symbol entries to their corresponding
6897 function descriptor symbol entries. */
6898
6899 static bfd_boolean
6900 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
6901 {
6902 struct bfd_link_info *info;
6903 struct ppc_link_hash_table *htab;
6904 struct plt_entry *ent;
6905 struct ppc_link_hash_entry *fh;
6906 struct ppc_link_hash_entry *fdh;
6907 bfd_boolean force_local;
6908
6909 fh = (struct ppc_link_hash_entry *) h;
6910 if (fh->elf.root.type == bfd_link_hash_indirect)
6911 return TRUE;
6912
6913 info = inf;
6914 htab = ppc_hash_table (info);
6915 if (htab == NULL)
6916 return FALSE;
6917
6918 /* Resolve undefined references to dot-symbols as the value
6919 in the function descriptor, if we have one in a regular object.
6920 This is to satisfy cases like ".quad .foo". Calls to functions
6921 in dynamic objects are handled elsewhere. */
6922 if (fh->elf.root.type == bfd_link_hash_undefweak
6923 && fh->was_undefined
6924 && (fdh = defined_func_desc (fh)) != NULL
6925 && get_opd_info (fdh->elf.root.u.def.section) != NULL
6926 && opd_entry_value (fdh->elf.root.u.def.section,
6927 fdh->elf.root.u.def.value,
6928 &fh->elf.root.u.def.section,
6929 &fh->elf.root.u.def.value, FALSE) != (bfd_vma) -1)
6930 {
6931 fh->elf.root.type = fdh->elf.root.type;
6932 fh->elf.forced_local = 1;
6933 fh->elf.def_regular = fdh->elf.def_regular;
6934 fh->elf.def_dynamic = fdh->elf.def_dynamic;
6935 }
6936
6937 /* If this is a function code symbol, transfer dynamic linking
6938 information to the function descriptor symbol. */
6939 if (!fh->is_func)
6940 return TRUE;
6941
6942 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
6943 if (ent->plt.refcount > 0)
6944 break;
6945 if (ent == NULL
6946 || fh->elf.root.root.string[0] != '.'
6947 || fh->elf.root.root.string[1] == '\0')
6948 return TRUE;
6949
6950 /* Find the corresponding function descriptor symbol. Create it
6951 as undefined if necessary. */
6952
6953 fdh = lookup_fdh (fh, htab);
6954 if (fdh == NULL
6955 && !bfd_link_executable (info)
6956 && (fh->elf.root.type == bfd_link_hash_undefined
6957 || fh->elf.root.type == bfd_link_hash_undefweak))
6958 {
6959 fdh = make_fdh (info, fh);
6960 if (fdh == NULL)
6961 return FALSE;
6962 }
6963
6964 /* Fake function descriptors are made undefweak. If the function
6965 code symbol is strong undefined, make the fake sym the same.
6966 If the function code symbol is defined, then force the fake
6967 descriptor local; We can't support overriding of symbols in a
6968 shared library on a fake descriptor. */
6969
6970 if (fdh != NULL
6971 && fdh->fake
6972 && fdh->elf.root.type == bfd_link_hash_undefweak)
6973 {
6974 if (fh->elf.root.type == bfd_link_hash_undefined)
6975 {
6976 fdh->elf.root.type = bfd_link_hash_undefined;
6977 bfd_link_add_undef (&htab->elf.root, &fdh->elf.root);
6978 }
6979 else if (fh->elf.root.type == bfd_link_hash_defined
6980 || fh->elf.root.type == bfd_link_hash_defweak)
6981 {
6982 _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE);
6983 }
6984 }
6985
6986 if (fdh != NULL
6987 && !fdh->elf.forced_local
6988 && (!bfd_link_executable (info)
6989 || fdh->elf.def_dynamic
6990 || fdh->elf.ref_dynamic
6991 || (fdh->elf.root.type == bfd_link_hash_undefweak
6992 && ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT)))
6993 {
6994 if (fdh->elf.dynindx == -1)
6995 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
6996 return FALSE;
6997 fdh->elf.ref_regular |= fh->elf.ref_regular;
6998 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
6999 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
7000 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
7001 if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT)
7002 {
7003 move_plt_plist (fh, fdh);
7004 fdh->elf.needs_plt = 1;
7005 }
7006 fdh->is_func_descriptor = 1;
7007 fdh->oh = fh;
7008 fh->oh = fdh;
7009 }
7010
7011 /* Now that the info is on the function descriptor, clear the
7012 function code sym info. Any function code syms for which we
7013 don't have a definition in a regular file, we force local.
7014 This prevents a shared library from exporting syms that have
7015 been imported from another library. Function code syms that
7016 are really in the library we must leave global to prevent the
7017 linker dragging in a definition from a static library. */
7018 force_local = (!fh->elf.def_regular
7019 || fdh == NULL
7020 || !fdh->elf.def_regular
7021 || fdh->elf.forced_local);
7022 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
7023
7024 return TRUE;
7025 }
7026
7027 static const struct sfpr_def_parms save_res_funcs[] =
7028 {
7029 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
7030 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
7031 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
7032 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
7033 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
7034 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
7035 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
7036 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
7037 { "._savef", 14, 31, savefpr, savefpr1_tail },
7038 { "._restf", 14, 31, restfpr, restfpr1_tail },
7039 { "_savevr_", 20, 31, savevr, savevr_tail },
7040 { "_restvr_", 20, 31, restvr, restvr_tail }
7041 };
7042
7043 /* Called near the start of bfd_elf_size_dynamic_sections. We use
7044 this hook to a) provide some gcc support functions, and b) transfer
7045 dynamic linking information gathered so far on function code symbol
7046 entries, to their corresponding function descriptor symbol entries. */
7047
7048 static bfd_boolean
7049 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
7050 struct bfd_link_info *info)
7051 {
7052 struct ppc_link_hash_table *htab;
7053 unsigned int i;
7054
7055 htab = ppc_hash_table (info);
7056 if (htab == NULL)
7057 return FALSE;
7058
7059 if (!bfd_link_relocatable (info)
7060 && htab->elf.hgot != NULL)
7061 {
7062 _bfd_elf_link_hash_hide_symbol (info, htab->elf.hgot, TRUE);
7063 /* Make .TOC. defined so as to prevent it being made dynamic.
7064 The wrong value here is fixed later in ppc64_elf_set_toc. */
7065 if (!htab->elf.hgot->def_regular
7066 || htab->elf.hgot->root.type != bfd_link_hash_defined)
7067 {
7068 htab->elf.hgot->root.type = bfd_link_hash_defined;
7069 htab->elf.hgot->root.u.def.value = 0;
7070 htab->elf.hgot->root.u.def.section = bfd_abs_section_ptr;
7071 htab->elf.hgot->def_regular = 1;
7072 htab->elf.hgot->root.linker_def = 1;
7073 }
7074 htab->elf.hgot->type = STT_OBJECT;
7075 htab->elf.hgot->other = ((htab->elf.hgot->other & ~ELF_ST_VISIBILITY (-1))
7076 | STV_HIDDEN);
7077 }
7078
7079 if (htab->sfpr == NULL)
7080 /* We don't have any relocs. */
7081 return TRUE;
7082
7083 /* Provide any missing _save* and _rest* functions. */
7084 htab->sfpr->size = 0;
7085 if (htab->params->save_restore_funcs)
7086 for (i = 0; i < ARRAY_SIZE (save_res_funcs); i++)
7087 if (!sfpr_define (info, &save_res_funcs[i], NULL))
7088 return FALSE;
7089
7090 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
7091
7092 if (htab->sfpr->size == 0)
7093 htab->sfpr->flags |= SEC_EXCLUDE;
7094
7095 return TRUE;
7096 }
7097
7098 /* Return true if we have dynamic relocs that apply to read-only sections. */
7099
7100 static bfd_boolean
7101 readonly_dynrelocs (struct elf_link_hash_entry *h)
7102 {
7103 struct ppc_link_hash_entry *eh;
7104 struct elf_dyn_relocs *p;
7105
7106 eh = (struct ppc_link_hash_entry *) h;
7107 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7108 {
7109 asection *s = p->sec->output_section;
7110
7111 if (s != NULL && (s->flags & SEC_READONLY) != 0)
7112 return TRUE;
7113 }
7114 return FALSE;
7115 }
7116
7117 /* Adjust a symbol defined by a dynamic object and referenced by a
7118 regular object. The current definition is in some section of the
7119 dynamic object, but we're not including those sections. We have to
7120 change the definition to something the rest of the link can
7121 understand. */
7122
7123 static bfd_boolean
7124 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
7125 struct elf_link_hash_entry *h)
7126 {
7127 struct ppc_link_hash_table *htab;
7128 asection *s;
7129
7130 htab = ppc_hash_table (info);
7131 if (htab == NULL)
7132 return FALSE;
7133
7134 /* Deal with function syms. */
7135 if (h->type == STT_FUNC
7136 || h->type == STT_GNU_IFUNC
7137 || h->needs_plt)
7138 {
7139 /* Clear procedure linkage table information for any symbol that
7140 won't need a .plt entry. */
7141 struct plt_entry *ent;
7142 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
7143 if (ent->plt.refcount > 0)
7144 break;
7145 if (ent == NULL
7146 || (h->type != STT_GNU_IFUNC
7147 && (SYMBOL_CALLS_LOCAL (info, h)
7148 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
7149 && h->root.type == bfd_link_hash_undefweak)))
7150 || ((struct ppc_link_hash_entry *) h)->save_res)
7151 {
7152 h->plt.plist = NULL;
7153 h->needs_plt = 0;
7154 h->pointer_equality_needed = 0;
7155 }
7156 else if (abiversion (info->output_bfd) == 2)
7157 {
7158 /* Taking a function's address in a read/write section
7159 doesn't require us to define the function symbol in the
7160 executable on a global entry stub. A dynamic reloc can
7161 be used instead. */
7162 if (h->pointer_equality_needed
7163 && h->type != STT_GNU_IFUNC
7164 && !readonly_dynrelocs (h))
7165 {
7166 h->pointer_equality_needed = 0;
7167 h->non_got_ref = 0;
7168 }
7169
7170 /* After adjust_dynamic_symbol, non_got_ref set in the
7171 non-shared case means that we have allocated space in
7172 .dynbss for the symbol and thus dyn_relocs for this
7173 symbol should be discarded.
7174 If we get here we know we are making a PLT entry for this
7175 symbol, and in an executable we'd normally resolve
7176 relocations against this symbol to the PLT entry. Allow
7177 dynamic relocs if the reference is weak, and the dynamic
7178 relocs will not cause text relocation. */
7179 else if (!h->ref_regular_nonweak
7180 && h->non_got_ref
7181 && h->type != STT_GNU_IFUNC
7182 && !readonly_dynrelocs (h))
7183 h->non_got_ref = 0;
7184
7185 /* If making a plt entry, then we don't need copy relocs. */
7186 return TRUE;
7187 }
7188 }
7189 else
7190 h->plt.plist = NULL;
7191
7192 /* If this is a weak symbol, and there is a real definition, the
7193 processor independent code will have arranged for us to see the
7194 real definition first, and we can just use the same value. */
7195 if (h->u.weakdef != NULL)
7196 {
7197 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
7198 || h->u.weakdef->root.type == bfd_link_hash_defweak);
7199 h->root.u.def.section = h->u.weakdef->root.u.def.section;
7200 h->root.u.def.value = h->u.weakdef->root.u.def.value;
7201 if (ELIMINATE_COPY_RELOCS)
7202 h->non_got_ref = h->u.weakdef->non_got_ref;
7203 return TRUE;
7204 }
7205
7206 /* If we are creating a shared library, we must presume that the
7207 only references to the symbol are via the global offset table.
7208 For such cases we need not do anything here; the relocations will
7209 be handled correctly by relocate_section. */
7210 if (bfd_link_pic (info))
7211 return TRUE;
7212
7213 /* If there are no references to this symbol that do not use the
7214 GOT, we don't need to generate a copy reloc. */
7215 if (!h->non_got_ref)
7216 return TRUE;
7217
7218 /* Don't generate a copy reloc for symbols defined in the executable. */
7219 if (!h->def_dynamic || !h->ref_regular || h->def_regular)
7220 return TRUE;
7221
7222 /* If -z nocopyreloc was given, don't generate them either. */
7223 if (info->nocopyreloc)
7224 {
7225 h->non_got_ref = 0;
7226 return TRUE;
7227 }
7228
7229 /* If we didn't find any dynamic relocs in read-only sections, then
7230 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
7231 if (ELIMINATE_COPY_RELOCS && !readonly_dynrelocs (h))
7232 {
7233 h->non_got_ref = 0;
7234 return TRUE;
7235 }
7236
7237 /* Protected variables do not work with .dynbss. The copy in
7238 .dynbss won't be used by the shared library with the protected
7239 definition for the variable. Text relocations are preferable
7240 to an incorrect program. */
7241 if (h->protected_def)
7242 {
7243 h->non_got_ref = 0;
7244 return TRUE;
7245 }
7246
7247 if (h->plt.plist != NULL)
7248 {
7249 /* We should never get here, but unfortunately there are versions
7250 of gcc out there that improperly (for this ABI) put initialized
7251 function pointers, vtable refs and suchlike in read-only
7252 sections. Allow them to proceed, but warn that this might
7253 break at runtime. */
7254 info->callbacks->einfo
7255 (_("%P: copy reloc against `%T' requires lazy plt linking; "
7256 "avoid setting LD_BIND_NOW=1 or upgrade gcc\n"),
7257 h->root.root.string);
7258 }
7259
7260 /* This is a reference to a symbol defined by a dynamic object which
7261 is not a function. */
7262
7263 /* We must allocate the symbol in our .dynbss section, which will
7264 become part of the .bss section of the executable. There will be
7265 an entry for this symbol in the .dynsym section. The dynamic
7266 object will contain position independent code, so all references
7267 from the dynamic object to this symbol will go through the global
7268 offset table. The dynamic linker will use the .dynsym entry to
7269 determine the address it must put in the global offset table, so
7270 both the dynamic object and the regular object will refer to the
7271 same memory location for the variable. */
7272
7273 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
7274 to copy the initial value out of the dynamic object and into the
7275 runtime process image. We need to remember the offset into the
7276 .rela.bss section we are going to use. */
7277 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
7278 {
7279 htab->relbss->size += sizeof (Elf64_External_Rela);
7280 h->needs_copy = 1;
7281 }
7282
7283 s = htab->dynbss;
7284
7285 return _bfd_elf_adjust_dynamic_copy (info, h, s);
7286 }
7287
7288 /* If given a function descriptor symbol, hide both the function code
7289 sym and the descriptor. */
7290 static void
7291 ppc64_elf_hide_symbol (struct bfd_link_info *info,
7292 struct elf_link_hash_entry *h,
7293 bfd_boolean force_local)
7294 {
7295 struct ppc_link_hash_entry *eh;
7296 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
7297
7298 eh = (struct ppc_link_hash_entry *) h;
7299 if (eh->is_func_descriptor)
7300 {
7301 struct ppc_link_hash_entry *fh = eh->oh;
7302
7303 if (fh == NULL)
7304 {
7305 const char *p, *q;
7306 struct ppc_link_hash_table *htab;
7307 char save;
7308
7309 /* We aren't supposed to use alloca in BFD because on
7310 systems which do not have alloca the version in libiberty
7311 calls xmalloc, which might cause the program to crash
7312 when it runs out of memory. This function doesn't have a
7313 return status, so there's no way to gracefully return an
7314 error. So cheat. We know that string[-1] can be safely
7315 accessed; It's either a string in an ELF string table,
7316 or allocated in an objalloc structure. */
7317
7318 p = eh->elf.root.root.string - 1;
7319 save = *p;
7320 *(char *) p = '.';
7321 htab = ppc_hash_table (info);
7322 if (htab == NULL)
7323 return;
7324
7325 fh = (struct ppc_link_hash_entry *)
7326 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
7327 *(char *) p = save;
7328
7329 /* Unfortunately, if it so happens that the string we were
7330 looking for was allocated immediately before this string,
7331 then we overwrote the string terminator. That's the only
7332 reason the lookup should fail. */
7333 if (fh == NULL)
7334 {
7335 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
7336 while (q >= eh->elf.root.root.string && *q == *p)
7337 --q, --p;
7338 if (q < eh->elf.root.root.string && *p == '.')
7339 fh = (struct ppc_link_hash_entry *)
7340 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
7341 }
7342 if (fh != NULL)
7343 {
7344 eh->oh = fh;
7345 fh->oh = eh;
7346 }
7347 }
7348 if (fh != NULL)
7349 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
7350 }
7351 }
7352
7353 static bfd_boolean
7354 get_sym_h (struct elf_link_hash_entry **hp,
7355 Elf_Internal_Sym **symp,
7356 asection **symsecp,
7357 unsigned char **tls_maskp,
7358 Elf_Internal_Sym **locsymsp,
7359 unsigned long r_symndx,
7360 bfd *ibfd)
7361 {
7362 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
7363
7364 if (r_symndx >= symtab_hdr->sh_info)
7365 {
7366 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
7367 struct elf_link_hash_entry *h;
7368
7369 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
7370 h = elf_follow_link (h);
7371
7372 if (hp != NULL)
7373 *hp = h;
7374
7375 if (symp != NULL)
7376 *symp = NULL;
7377
7378 if (symsecp != NULL)
7379 {
7380 asection *symsec = NULL;
7381 if (h->root.type == bfd_link_hash_defined
7382 || h->root.type == bfd_link_hash_defweak)
7383 symsec = h->root.u.def.section;
7384 *symsecp = symsec;
7385 }
7386
7387 if (tls_maskp != NULL)
7388 {
7389 struct ppc_link_hash_entry *eh;
7390
7391 eh = (struct ppc_link_hash_entry *) h;
7392 *tls_maskp = &eh->tls_mask;
7393 }
7394 }
7395 else
7396 {
7397 Elf_Internal_Sym *sym;
7398 Elf_Internal_Sym *locsyms = *locsymsp;
7399
7400 if (locsyms == NULL)
7401 {
7402 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
7403 if (locsyms == NULL)
7404 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
7405 symtab_hdr->sh_info,
7406 0, NULL, NULL, NULL);
7407 if (locsyms == NULL)
7408 return FALSE;
7409 *locsymsp = locsyms;
7410 }
7411 sym = locsyms + r_symndx;
7412
7413 if (hp != NULL)
7414 *hp = NULL;
7415
7416 if (symp != NULL)
7417 *symp = sym;
7418
7419 if (symsecp != NULL)
7420 *symsecp = bfd_section_from_elf_index (ibfd, sym->st_shndx);
7421
7422 if (tls_maskp != NULL)
7423 {
7424 struct got_entry **lgot_ents;
7425 unsigned char *tls_mask;
7426
7427 tls_mask = NULL;
7428 lgot_ents = elf_local_got_ents (ibfd);
7429 if (lgot_ents != NULL)
7430 {
7431 struct plt_entry **local_plt = (struct plt_entry **)
7432 (lgot_ents + symtab_hdr->sh_info);
7433 unsigned char *lgot_masks = (unsigned char *)
7434 (local_plt + symtab_hdr->sh_info);
7435 tls_mask = &lgot_masks[r_symndx];
7436 }
7437 *tls_maskp = tls_mask;
7438 }
7439 }
7440 return TRUE;
7441 }
7442
7443 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
7444 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
7445 type suitable for optimization, and 1 otherwise. */
7446
7447 static int
7448 get_tls_mask (unsigned char **tls_maskp,
7449 unsigned long *toc_symndx,
7450 bfd_vma *toc_addend,
7451 Elf_Internal_Sym **locsymsp,
7452 const Elf_Internal_Rela *rel,
7453 bfd *ibfd)
7454 {
7455 unsigned long r_symndx;
7456 int next_r;
7457 struct elf_link_hash_entry *h;
7458 Elf_Internal_Sym *sym;
7459 asection *sec;
7460 bfd_vma off;
7461
7462 r_symndx = ELF64_R_SYM (rel->r_info);
7463 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
7464 return 0;
7465
7466 if ((*tls_maskp != NULL && **tls_maskp != 0)
7467 || sec == NULL
7468 || ppc64_elf_section_data (sec) == NULL
7469 || ppc64_elf_section_data (sec)->sec_type != sec_toc)
7470 return 1;
7471
7472 /* Look inside a TOC section too. */
7473 if (h != NULL)
7474 {
7475 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
7476 off = h->root.u.def.value;
7477 }
7478 else
7479 off = sym->st_value;
7480 off += rel->r_addend;
7481 BFD_ASSERT (off % 8 == 0);
7482 r_symndx = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8];
7483 next_r = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8 + 1];
7484 if (toc_symndx != NULL)
7485 *toc_symndx = r_symndx;
7486 if (toc_addend != NULL)
7487 *toc_addend = ppc64_elf_section_data (sec)->u.toc.add[off / 8];
7488 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
7489 return 0;
7490 if ((h == NULL || is_static_defined (h))
7491 && (next_r == -1 || next_r == -2))
7492 return 1 - next_r;
7493 return 1;
7494 }
7495
7496 /* Find (or create) an entry in the tocsave hash table. */
7497
7498 static struct tocsave_entry *
7499 tocsave_find (struct ppc_link_hash_table *htab,
7500 enum insert_option insert,
7501 Elf_Internal_Sym **local_syms,
7502 const Elf_Internal_Rela *irela,
7503 bfd *ibfd)
7504 {
7505 unsigned long r_indx;
7506 struct elf_link_hash_entry *h;
7507 Elf_Internal_Sym *sym;
7508 struct tocsave_entry ent, *p;
7509 hashval_t hash;
7510 struct tocsave_entry **slot;
7511
7512 r_indx = ELF64_R_SYM (irela->r_info);
7513 if (!get_sym_h (&h, &sym, &ent.sec, NULL, local_syms, r_indx, ibfd))
7514 return NULL;
7515 if (ent.sec == NULL || ent.sec->output_section == NULL)
7516 {
7517 (*_bfd_error_handler)
7518 (_("%B: undefined symbol on R_PPC64_TOCSAVE relocation"));
7519 return NULL;
7520 }
7521
7522 if (h != NULL)
7523 ent.offset = h->root.u.def.value;
7524 else
7525 ent.offset = sym->st_value;
7526 ent.offset += irela->r_addend;
7527
7528 hash = tocsave_htab_hash (&ent);
7529 slot = ((struct tocsave_entry **)
7530 htab_find_slot_with_hash (htab->tocsave_htab, &ent, hash, insert));
7531 if (slot == NULL)
7532 return NULL;
7533
7534 if (*slot == NULL)
7535 {
7536 p = (struct tocsave_entry *) bfd_alloc (ibfd, sizeof (*p));
7537 if (p == NULL)
7538 return NULL;
7539 *p = ent;
7540 *slot = p;
7541 }
7542 return *slot;
7543 }
7544
7545 /* Adjust all global syms defined in opd sections. In gcc generated
7546 code for the old ABI, these will already have been done. */
7547
7548 static bfd_boolean
7549 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
7550 {
7551 struct ppc_link_hash_entry *eh;
7552 asection *sym_sec;
7553 struct _opd_sec_data *opd;
7554
7555 if (h->root.type == bfd_link_hash_indirect)
7556 return TRUE;
7557
7558 if (h->root.type != bfd_link_hash_defined
7559 && h->root.type != bfd_link_hash_defweak)
7560 return TRUE;
7561
7562 eh = (struct ppc_link_hash_entry *) h;
7563 if (eh->adjust_done)
7564 return TRUE;
7565
7566 sym_sec = eh->elf.root.u.def.section;
7567 opd = get_opd_info (sym_sec);
7568 if (opd != NULL && opd->adjust != NULL)
7569 {
7570 long adjust = opd->adjust[OPD_NDX (eh->elf.root.u.def.value)];
7571 if (adjust == -1)
7572 {
7573 /* This entry has been deleted. */
7574 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
7575 if (dsec == NULL)
7576 {
7577 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
7578 if (discarded_section (dsec))
7579 {
7580 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
7581 break;
7582 }
7583 }
7584 eh->elf.root.u.def.value = 0;
7585 eh->elf.root.u.def.section = dsec;
7586 }
7587 else
7588 eh->elf.root.u.def.value += adjust;
7589 eh->adjust_done = 1;
7590 }
7591 return TRUE;
7592 }
7593
7594 /* Handles decrementing dynamic reloc counts for the reloc specified by
7595 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM
7596 have already been determined. */
7597
7598 static bfd_boolean
7599 dec_dynrel_count (bfd_vma r_info,
7600 asection *sec,
7601 struct bfd_link_info *info,
7602 Elf_Internal_Sym **local_syms,
7603 struct elf_link_hash_entry *h,
7604 Elf_Internal_Sym *sym)
7605 {
7606 enum elf_ppc64_reloc_type r_type;
7607 asection *sym_sec = NULL;
7608
7609 /* Can this reloc be dynamic? This switch, and later tests here
7610 should be kept in sync with the code in check_relocs. */
7611 r_type = ELF64_R_TYPE (r_info);
7612 switch (r_type)
7613 {
7614 default:
7615 return TRUE;
7616
7617 case R_PPC64_TPREL16:
7618 case R_PPC64_TPREL16_LO:
7619 case R_PPC64_TPREL16_HI:
7620 case R_PPC64_TPREL16_HA:
7621 case R_PPC64_TPREL16_DS:
7622 case R_PPC64_TPREL16_LO_DS:
7623 case R_PPC64_TPREL16_HIGH:
7624 case R_PPC64_TPREL16_HIGHA:
7625 case R_PPC64_TPREL16_HIGHER:
7626 case R_PPC64_TPREL16_HIGHERA:
7627 case R_PPC64_TPREL16_HIGHEST:
7628 case R_PPC64_TPREL16_HIGHESTA:
7629 if (!bfd_link_pic (info))
7630 return TRUE;
7631
7632 case R_PPC64_TPREL64:
7633 case R_PPC64_DTPMOD64:
7634 case R_PPC64_DTPREL64:
7635 case R_PPC64_ADDR64:
7636 case R_PPC64_REL30:
7637 case R_PPC64_REL32:
7638 case R_PPC64_REL64:
7639 case R_PPC64_ADDR14:
7640 case R_PPC64_ADDR14_BRNTAKEN:
7641 case R_PPC64_ADDR14_BRTAKEN:
7642 case R_PPC64_ADDR16:
7643 case R_PPC64_ADDR16_DS:
7644 case R_PPC64_ADDR16_HA:
7645 case R_PPC64_ADDR16_HI:
7646 case R_PPC64_ADDR16_HIGH:
7647 case R_PPC64_ADDR16_HIGHA:
7648 case R_PPC64_ADDR16_HIGHER:
7649 case R_PPC64_ADDR16_HIGHERA:
7650 case R_PPC64_ADDR16_HIGHEST:
7651 case R_PPC64_ADDR16_HIGHESTA:
7652 case R_PPC64_ADDR16_LO:
7653 case R_PPC64_ADDR16_LO_DS:
7654 case R_PPC64_ADDR24:
7655 case R_PPC64_ADDR32:
7656 case R_PPC64_UADDR16:
7657 case R_PPC64_UADDR32:
7658 case R_PPC64_UADDR64:
7659 case R_PPC64_TOC:
7660 break;
7661 }
7662
7663 if (local_syms != NULL)
7664 {
7665 unsigned long r_symndx;
7666 bfd *ibfd = sec->owner;
7667
7668 r_symndx = ELF64_R_SYM (r_info);
7669 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
7670 return FALSE;
7671 }
7672
7673 if ((bfd_link_pic (info)
7674 && (must_be_dyn_reloc (info, r_type)
7675 || (h != NULL
7676 && (!SYMBOLIC_BIND (info, h)
7677 || h->root.type == bfd_link_hash_defweak
7678 || !h->def_regular))))
7679 || (ELIMINATE_COPY_RELOCS
7680 && !bfd_link_pic (info)
7681 && h != NULL
7682 && (h->root.type == bfd_link_hash_defweak
7683 || !h->def_regular)))
7684 ;
7685 else
7686 return TRUE;
7687
7688 if (h != NULL)
7689 {
7690 struct elf_dyn_relocs *p;
7691 struct elf_dyn_relocs **pp;
7692 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
7693
7694 /* elf_gc_sweep may have already removed all dyn relocs associated
7695 with local syms for a given section. Also, symbol flags are
7696 changed by elf_gc_sweep_symbol, confusing the test above. Don't
7697 report a dynreloc miscount. */
7698 if (*pp == NULL && info->gc_sections)
7699 return TRUE;
7700
7701 while ((p = *pp) != NULL)
7702 {
7703 if (p->sec == sec)
7704 {
7705 if (!must_be_dyn_reloc (info, r_type))
7706 p->pc_count -= 1;
7707 p->count -= 1;
7708 if (p->count == 0)
7709 *pp = p->next;
7710 return TRUE;
7711 }
7712 pp = &p->next;
7713 }
7714 }
7715 else
7716 {
7717 struct ppc_dyn_relocs *p;
7718 struct ppc_dyn_relocs **pp;
7719 void *vpp;
7720 bfd_boolean is_ifunc;
7721
7722 if (local_syms == NULL)
7723 sym_sec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
7724 if (sym_sec == NULL)
7725 sym_sec = sec;
7726
7727 vpp = &elf_section_data (sym_sec)->local_dynrel;
7728 pp = (struct ppc_dyn_relocs **) vpp;
7729
7730 if (*pp == NULL && info->gc_sections)
7731 return TRUE;
7732
7733 is_ifunc = ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC;
7734 while ((p = *pp) != NULL)
7735 {
7736 if (p->sec == sec && p->ifunc == is_ifunc)
7737 {
7738 p->count -= 1;
7739 if (p->count == 0)
7740 *pp = p->next;
7741 return TRUE;
7742 }
7743 pp = &p->next;
7744 }
7745 }
7746
7747 info->callbacks->einfo (_("%P: dynreloc miscount for %B, section %A\n"),
7748 sec->owner, sec);
7749 bfd_set_error (bfd_error_bad_value);
7750 return FALSE;
7751 }
7752
7753 /* Remove unused Official Procedure Descriptor entries. Currently we
7754 only remove those associated with functions in discarded link-once
7755 sections, or weakly defined functions that have been overridden. It
7756 would be possible to remove many more entries for statically linked
7757 applications. */
7758
7759 bfd_boolean
7760 ppc64_elf_edit_opd (struct bfd_link_info *info)
7761 {
7762 bfd *ibfd;
7763 bfd_boolean some_edited = FALSE;
7764 asection *need_pad = NULL;
7765 struct ppc_link_hash_table *htab;
7766
7767 htab = ppc_hash_table (info);
7768 if (htab == NULL)
7769 return FALSE;
7770
7771 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
7772 {
7773 asection *sec;
7774 Elf_Internal_Rela *relstart, *rel, *relend;
7775 Elf_Internal_Shdr *symtab_hdr;
7776 Elf_Internal_Sym *local_syms;
7777 struct _opd_sec_data *opd;
7778 bfd_boolean need_edit, add_aux_fields, broken;
7779 bfd_size_type cnt_16b = 0;
7780
7781 if (!is_ppc64_elf (ibfd))
7782 continue;
7783
7784 sec = bfd_get_section_by_name (ibfd, ".opd");
7785 if (sec == NULL || sec->size == 0)
7786 continue;
7787
7788 if (sec->sec_info_type == SEC_INFO_TYPE_JUST_SYMS)
7789 continue;
7790
7791 if (sec->output_section == bfd_abs_section_ptr)
7792 continue;
7793
7794 /* Look through the section relocs. */
7795 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
7796 continue;
7797
7798 local_syms = NULL;
7799 symtab_hdr = &elf_symtab_hdr (ibfd);
7800
7801 /* Read the relocations. */
7802 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7803 info->keep_memory);
7804 if (relstart == NULL)
7805 return FALSE;
7806
7807 /* First run through the relocs to check they are sane, and to
7808 determine whether we need to edit this opd section. */
7809 need_edit = FALSE;
7810 broken = FALSE;
7811 need_pad = sec;
7812 relend = relstart + sec->reloc_count;
7813 for (rel = relstart; rel < relend; )
7814 {
7815 enum elf_ppc64_reloc_type r_type;
7816 unsigned long r_symndx;
7817 asection *sym_sec;
7818 struct elf_link_hash_entry *h;
7819 Elf_Internal_Sym *sym;
7820 bfd_vma offset;
7821
7822 /* .opd contains an array of 16 or 24 byte entries. We're
7823 only interested in the reloc pointing to a function entry
7824 point. */
7825 offset = rel->r_offset;
7826 if (rel + 1 == relend
7827 || rel[1].r_offset != offset + 8)
7828 {
7829 /* If someone messes with .opd alignment then after a
7830 "ld -r" we might have padding in the middle of .opd.
7831 Also, there's nothing to prevent someone putting
7832 something silly in .opd with the assembler. No .opd
7833 optimization for them! */
7834 broken_opd:
7835 (*_bfd_error_handler)
7836 (_("%B: .opd is not a regular array of opd entries"), ibfd);
7837 broken = TRUE;
7838 break;
7839 }
7840
7841 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
7842 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
7843 {
7844 (*_bfd_error_handler)
7845 (_("%B: unexpected reloc type %u in .opd section"),
7846 ibfd, r_type);
7847 broken = TRUE;
7848 break;
7849 }
7850
7851 r_symndx = ELF64_R_SYM (rel->r_info);
7852 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7853 r_symndx, ibfd))
7854 goto error_ret;
7855
7856 if (sym_sec == NULL || sym_sec->owner == NULL)
7857 {
7858 const char *sym_name;
7859 if (h != NULL)
7860 sym_name = h->root.root.string;
7861 else
7862 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
7863 sym_sec);
7864
7865 (*_bfd_error_handler)
7866 (_("%B: undefined sym `%s' in .opd section"),
7867 ibfd, sym_name);
7868 broken = TRUE;
7869 break;
7870 }
7871
7872 /* opd entries are always for functions defined in the
7873 current input bfd. If the symbol isn't defined in the
7874 input bfd, then we won't be using the function in this
7875 bfd; It must be defined in a linkonce section in another
7876 bfd, or is weak. It's also possible that we are
7877 discarding the function due to a linker script /DISCARD/,
7878 which we test for via the output_section. */
7879 if (sym_sec->owner != ibfd
7880 || sym_sec->output_section == bfd_abs_section_ptr)
7881 need_edit = TRUE;
7882
7883 rel += 2;
7884 if (rel + 1 == relend
7885 || (rel + 2 < relend
7886 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC))
7887 ++rel;
7888
7889 if (rel == relend)
7890 {
7891 if (sec->size == offset + 24)
7892 {
7893 need_pad = NULL;
7894 break;
7895 }
7896 if (sec->size == offset + 16)
7897 {
7898 cnt_16b++;
7899 break;
7900 }
7901 goto broken_opd;
7902 }
7903 else if (rel + 1 < relend
7904 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
7905 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
7906 {
7907 if (rel[0].r_offset == offset + 16)
7908 cnt_16b++;
7909 else if (rel[0].r_offset != offset + 24)
7910 goto broken_opd;
7911 }
7912 else
7913 goto broken_opd;
7914 }
7915
7916 add_aux_fields = htab->params->non_overlapping_opd && cnt_16b > 0;
7917
7918 if (!broken && (need_edit || add_aux_fields))
7919 {
7920 Elf_Internal_Rela *write_rel;
7921 Elf_Internal_Shdr *rel_hdr;
7922 bfd_byte *rptr, *wptr;
7923 bfd_byte *new_contents;
7924 bfd_size_type amt;
7925
7926 new_contents = NULL;
7927 amt = OPD_NDX (sec->size) * sizeof (long);
7928 opd = &ppc64_elf_section_data (sec)->u.opd;
7929 opd->adjust = bfd_zalloc (sec->owner, amt);
7930 if (opd->adjust == NULL)
7931 return FALSE;
7932 ppc64_elf_section_data (sec)->sec_type = sec_opd;
7933
7934 /* This seems a waste of time as input .opd sections are all
7935 zeros as generated by gcc, but I suppose there's no reason
7936 this will always be so. We might start putting something in
7937 the third word of .opd entries. */
7938 if ((sec->flags & SEC_IN_MEMORY) == 0)
7939 {
7940 bfd_byte *loc;
7941 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
7942 {
7943 if (loc != NULL)
7944 free (loc);
7945 error_ret:
7946 if (local_syms != NULL
7947 && symtab_hdr->contents != (unsigned char *) local_syms)
7948 free (local_syms);
7949 if (elf_section_data (sec)->relocs != relstart)
7950 free (relstart);
7951 return FALSE;
7952 }
7953 sec->contents = loc;
7954 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
7955 }
7956
7957 elf_section_data (sec)->relocs = relstart;
7958
7959 new_contents = sec->contents;
7960 if (add_aux_fields)
7961 {
7962 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
7963 if (new_contents == NULL)
7964 return FALSE;
7965 need_pad = NULL;
7966 }
7967 wptr = new_contents;
7968 rptr = sec->contents;
7969 write_rel = relstart;
7970 for (rel = relstart; rel < relend; )
7971 {
7972 unsigned long r_symndx;
7973 asection *sym_sec;
7974 struct elf_link_hash_entry *h;
7975 struct ppc_link_hash_entry *fdh = NULL;
7976 Elf_Internal_Sym *sym;
7977 long opd_ent_size;
7978 Elf_Internal_Rela *next_rel;
7979 bfd_boolean skip;
7980
7981 r_symndx = ELF64_R_SYM (rel->r_info);
7982 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7983 r_symndx, ibfd))
7984 goto error_ret;
7985
7986 next_rel = rel + 2;
7987 if (next_rel + 1 == relend
7988 || (next_rel + 2 < relend
7989 && ELF64_R_TYPE (next_rel[2].r_info) == R_PPC64_TOC))
7990 ++next_rel;
7991
7992 /* See if the .opd entry is full 24 byte or
7993 16 byte (with fd_aux entry overlapped with next
7994 fd_func). */
7995 opd_ent_size = 24;
7996 if (next_rel == relend)
7997 {
7998 if (sec->size == rel->r_offset + 16)
7999 opd_ent_size = 16;
8000 }
8001 else if (next_rel->r_offset == rel->r_offset + 16)
8002 opd_ent_size = 16;
8003
8004 if (h != NULL
8005 && h->root.root.string[0] == '.')
8006 {
8007 fdh = lookup_fdh ((struct ppc_link_hash_entry *) h, htab);
8008 if (fdh != NULL
8009 && fdh->elf.root.type != bfd_link_hash_defined
8010 && fdh->elf.root.type != bfd_link_hash_defweak)
8011 fdh = NULL;
8012 }
8013
8014 skip = (sym_sec->owner != ibfd
8015 || sym_sec->output_section == bfd_abs_section_ptr);
8016 if (skip)
8017 {
8018 if (fdh != NULL && sym_sec->owner == ibfd)
8019 {
8020 /* Arrange for the function descriptor sym
8021 to be dropped. */
8022 fdh->elf.root.u.def.value = 0;
8023 fdh->elf.root.u.def.section = sym_sec;
8024 }
8025 opd->adjust[OPD_NDX (rel->r_offset)] = -1;
8026
8027 if (NO_OPD_RELOCS || bfd_link_relocatable (info))
8028 rel = next_rel;
8029 else
8030 while (1)
8031 {
8032 if (!dec_dynrel_count (rel->r_info, sec, info,
8033 NULL, h, sym))
8034 goto error_ret;
8035
8036 if (++rel == next_rel)
8037 break;
8038
8039 r_symndx = ELF64_R_SYM (rel->r_info);
8040 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8041 r_symndx, ibfd))
8042 goto error_ret;
8043 }
8044 }
8045 else
8046 {
8047 /* We'll be keeping this opd entry. */
8048 long adjust;
8049
8050 if (fdh != NULL)
8051 {
8052 /* Redefine the function descriptor symbol to
8053 this location in the opd section. It is
8054 necessary to update the value here rather
8055 than using an array of adjustments as we do
8056 for local symbols, because various places
8057 in the generic ELF code use the value
8058 stored in u.def.value. */
8059 fdh->elf.root.u.def.value = wptr - new_contents;
8060 fdh->adjust_done = 1;
8061 }
8062
8063 /* Local syms are a bit tricky. We could
8064 tweak them as they can be cached, but
8065 we'd need to look through the local syms
8066 for the function descriptor sym which we
8067 don't have at the moment. So keep an
8068 array of adjustments. */
8069 adjust = (wptr - new_contents) - (rptr - sec->contents);
8070 opd->adjust[OPD_NDX (rel->r_offset)] = adjust;
8071
8072 if (wptr != rptr)
8073 memcpy (wptr, rptr, opd_ent_size);
8074 wptr += opd_ent_size;
8075 if (add_aux_fields && opd_ent_size == 16)
8076 {
8077 memset (wptr, '\0', 8);
8078 wptr += 8;
8079 }
8080
8081 /* We need to adjust any reloc offsets to point to the
8082 new opd entries. */
8083 for ( ; rel != next_rel; ++rel)
8084 {
8085 rel->r_offset += adjust;
8086 if (write_rel != rel)
8087 memcpy (write_rel, rel, sizeof (*rel));
8088 ++write_rel;
8089 }
8090 }
8091
8092 rptr += opd_ent_size;
8093 }
8094
8095 sec->size = wptr - new_contents;
8096 sec->reloc_count = write_rel - relstart;
8097 if (add_aux_fields)
8098 {
8099 free (sec->contents);
8100 sec->contents = new_contents;
8101 }
8102
8103 /* Fudge the header size too, as this is used later in
8104 elf_bfd_final_link if we are emitting relocs. */
8105 rel_hdr = _bfd_elf_single_rel_hdr (sec);
8106 rel_hdr->sh_size = sec->reloc_count * rel_hdr->sh_entsize;
8107 some_edited = TRUE;
8108 }
8109 else if (elf_section_data (sec)->relocs != relstart)
8110 free (relstart);
8111
8112 if (local_syms != NULL
8113 && symtab_hdr->contents != (unsigned char *) local_syms)
8114 {
8115 if (!info->keep_memory)
8116 free (local_syms);
8117 else
8118 symtab_hdr->contents = (unsigned char *) local_syms;
8119 }
8120 }
8121
8122 if (some_edited)
8123 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
8124
8125 /* If we are doing a final link and the last .opd entry is just 16 byte
8126 long, add a 8 byte padding after it. */
8127 if (need_pad != NULL && !bfd_link_relocatable (info))
8128 {
8129 bfd_byte *p;
8130
8131 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
8132 {
8133 BFD_ASSERT (need_pad->size > 0);
8134
8135 p = bfd_malloc (need_pad->size + 8);
8136 if (p == NULL)
8137 return FALSE;
8138
8139 if (! bfd_get_section_contents (need_pad->owner, need_pad,
8140 p, 0, need_pad->size))
8141 return FALSE;
8142
8143 need_pad->contents = p;
8144 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
8145 }
8146 else
8147 {
8148 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
8149 if (p == NULL)
8150 return FALSE;
8151
8152 need_pad->contents = p;
8153 }
8154
8155 memset (need_pad->contents + need_pad->size, 0, 8);
8156 need_pad->size += 8;
8157 }
8158
8159 return TRUE;
8160 }
8161
8162 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
8163
8164 asection *
8165 ppc64_elf_tls_setup (struct bfd_link_info *info)
8166 {
8167 struct ppc_link_hash_table *htab;
8168
8169 htab = ppc_hash_table (info);
8170 if (htab == NULL)
8171 return NULL;
8172
8173 if (abiversion (info->output_bfd) == 1)
8174 htab->opd_abi = 1;
8175
8176 if (htab->params->no_multi_toc)
8177 htab->do_multi_toc = 0;
8178 else if (!htab->do_multi_toc)
8179 htab->params->no_multi_toc = 1;
8180
8181 htab->tls_get_addr = ((struct ppc_link_hash_entry *)
8182 elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
8183 FALSE, FALSE, TRUE));
8184 /* Move dynamic linking info to the function descriptor sym. */
8185 if (htab->tls_get_addr != NULL)
8186 func_desc_adjust (&htab->tls_get_addr->elf, info);
8187 htab->tls_get_addr_fd = ((struct ppc_link_hash_entry *)
8188 elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
8189 FALSE, FALSE, TRUE));
8190 if (htab->params->tls_get_addr_opt)
8191 {
8192 struct elf_link_hash_entry *opt, *opt_fd, *tga, *tga_fd;
8193
8194 opt = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr_opt",
8195 FALSE, FALSE, TRUE);
8196 if (opt != NULL)
8197 func_desc_adjust (opt, info);
8198 opt_fd = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
8199 FALSE, FALSE, TRUE);
8200 if (opt_fd != NULL
8201 && (opt_fd->root.type == bfd_link_hash_defined
8202 || opt_fd->root.type == bfd_link_hash_defweak))
8203 {
8204 /* If glibc supports an optimized __tls_get_addr call stub,
8205 signalled by the presence of __tls_get_addr_opt, and we'll
8206 be calling __tls_get_addr via a plt call stub, then
8207 make __tls_get_addr point to __tls_get_addr_opt. */
8208 tga_fd = &htab->tls_get_addr_fd->elf;
8209 if (htab->elf.dynamic_sections_created
8210 && tga_fd != NULL
8211 && (tga_fd->type == STT_FUNC
8212 || tga_fd->needs_plt)
8213 && !(SYMBOL_CALLS_LOCAL (info, tga_fd)
8214 || (ELF_ST_VISIBILITY (tga_fd->other) != STV_DEFAULT
8215 && tga_fd->root.type == bfd_link_hash_undefweak)))
8216 {
8217 struct plt_entry *ent;
8218
8219 for (ent = tga_fd->plt.plist; ent != NULL; ent = ent->next)
8220 if (ent->plt.refcount > 0)
8221 break;
8222 if (ent != NULL)
8223 {
8224 tga_fd->root.type = bfd_link_hash_indirect;
8225 tga_fd->root.u.i.link = &opt_fd->root;
8226 ppc64_elf_copy_indirect_symbol (info, opt_fd, tga_fd);
8227 if (opt_fd->dynindx != -1)
8228 {
8229 /* Use __tls_get_addr_opt in dynamic relocations. */
8230 opt_fd->dynindx = -1;
8231 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
8232 opt_fd->dynstr_index);
8233 if (!bfd_elf_link_record_dynamic_symbol (info, opt_fd))
8234 return NULL;
8235 }
8236 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) opt_fd;
8237 tga = &htab->tls_get_addr->elf;
8238 if (opt != NULL && tga != NULL)
8239 {
8240 tga->root.type = bfd_link_hash_indirect;
8241 tga->root.u.i.link = &opt->root;
8242 ppc64_elf_copy_indirect_symbol (info, opt, tga);
8243 _bfd_elf_link_hash_hide_symbol (info, opt,
8244 tga->forced_local);
8245 htab->tls_get_addr = (struct ppc_link_hash_entry *) opt;
8246 }
8247 htab->tls_get_addr_fd->oh = htab->tls_get_addr;
8248 htab->tls_get_addr_fd->is_func_descriptor = 1;
8249 if (htab->tls_get_addr != NULL)
8250 {
8251 htab->tls_get_addr->oh = htab->tls_get_addr_fd;
8252 htab->tls_get_addr->is_func = 1;
8253 }
8254 }
8255 }
8256 }
8257 else if (htab->params->tls_get_addr_opt < 0)
8258 htab->params->tls_get_addr_opt = 0;
8259 }
8260 return _bfd_elf_tls_setup (info->output_bfd, info);
8261 }
8262
8263 /* Return TRUE iff REL is a branch reloc with a global symbol matching
8264 HASH1 or HASH2. */
8265
8266 static bfd_boolean
8267 branch_reloc_hash_match (const bfd *ibfd,
8268 const Elf_Internal_Rela *rel,
8269 const struct ppc_link_hash_entry *hash1,
8270 const struct ppc_link_hash_entry *hash2)
8271 {
8272 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
8273 enum elf_ppc64_reloc_type r_type = ELF64_R_TYPE (rel->r_info);
8274 unsigned int r_symndx = ELF64_R_SYM (rel->r_info);
8275
8276 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
8277 {
8278 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
8279 struct elf_link_hash_entry *h;
8280
8281 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
8282 h = elf_follow_link (h);
8283 if (h == &hash1->elf || h == &hash2->elf)
8284 return TRUE;
8285 }
8286 return FALSE;
8287 }
8288
8289 /* Run through all the TLS relocs looking for optimization
8290 opportunities. The linker has been hacked (see ppc64elf.em) to do
8291 a preliminary section layout so that we know the TLS segment
8292 offsets. We can't optimize earlier because some optimizations need
8293 to know the tp offset, and we need to optimize before allocating
8294 dynamic relocations. */
8295
8296 bfd_boolean
8297 ppc64_elf_tls_optimize (struct bfd_link_info *info)
8298 {
8299 bfd *ibfd;
8300 asection *sec;
8301 struct ppc_link_hash_table *htab;
8302 unsigned char *toc_ref;
8303 int pass;
8304
8305 if (!bfd_link_executable (info))
8306 return TRUE;
8307
8308 htab = ppc_hash_table (info);
8309 if (htab == NULL)
8310 return FALSE;
8311
8312 /* Make two passes over the relocs. On the first pass, mark toc
8313 entries involved with tls relocs, and check that tls relocs
8314 involved in setting up a tls_get_addr call are indeed followed by
8315 such a call. If they are not, we can't do any tls optimization.
8316 On the second pass twiddle tls_mask flags to notify
8317 relocate_section that optimization can be done, and adjust got
8318 and plt refcounts. */
8319 toc_ref = NULL;
8320 for (pass = 0; pass < 2; ++pass)
8321 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
8322 {
8323 Elf_Internal_Sym *locsyms = NULL;
8324 asection *toc = bfd_get_section_by_name (ibfd, ".toc");
8325
8326 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8327 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
8328 {
8329 Elf_Internal_Rela *relstart, *rel, *relend;
8330 bfd_boolean found_tls_get_addr_arg = 0;
8331
8332 /* Read the relocations. */
8333 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8334 info->keep_memory);
8335 if (relstart == NULL)
8336 {
8337 free (toc_ref);
8338 return FALSE;
8339 }
8340
8341 relend = relstart + sec->reloc_count;
8342 for (rel = relstart; rel < relend; rel++)
8343 {
8344 enum elf_ppc64_reloc_type r_type;
8345 unsigned long r_symndx;
8346 struct elf_link_hash_entry *h;
8347 Elf_Internal_Sym *sym;
8348 asection *sym_sec;
8349 unsigned char *tls_mask;
8350 unsigned char tls_set, tls_clear, tls_type = 0;
8351 bfd_vma value;
8352 bfd_boolean ok_tprel, is_local;
8353 long toc_ref_index = 0;
8354 int expecting_tls_get_addr = 0;
8355 bfd_boolean ret = FALSE;
8356
8357 r_symndx = ELF64_R_SYM (rel->r_info);
8358 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
8359 r_symndx, ibfd))
8360 {
8361 err_free_rel:
8362 if (elf_section_data (sec)->relocs != relstart)
8363 free (relstart);
8364 if (toc_ref != NULL)
8365 free (toc_ref);
8366 if (locsyms != NULL
8367 && (elf_symtab_hdr (ibfd).contents
8368 != (unsigned char *) locsyms))
8369 free (locsyms);
8370 return ret;
8371 }
8372
8373 if (h != NULL)
8374 {
8375 if (h->root.type == bfd_link_hash_defined
8376 || h->root.type == bfd_link_hash_defweak)
8377 value = h->root.u.def.value;
8378 else if (h->root.type == bfd_link_hash_undefweak)
8379 value = 0;
8380 else
8381 {
8382 found_tls_get_addr_arg = 0;
8383 continue;
8384 }
8385 }
8386 else
8387 /* Symbols referenced by TLS relocs must be of type
8388 STT_TLS. So no need for .opd local sym adjust. */
8389 value = sym->st_value;
8390
8391 ok_tprel = FALSE;
8392 is_local = FALSE;
8393 if (h == NULL
8394 || !h->def_dynamic)
8395 {
8396 is_local = TRUE;
8397 if (h != NULL
8398 && h->root.type == bfd_link_hash_undefweak)
8399 ok_tprel = TRUE;
8400 else if (sym_sec != NULL
8401 && sym_sec->output_section != NULL)
8402 {
8403 value += sym_sec->output_offset;
8404 value += sym_sec->output_section->vma;
8405 value -= htab->elf.tls_sec->vma;
8406 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
8407 < (bfd_vma) 1 << 32);
8408 }
8409 }
8410
8411 r_type = ELF64_R_TYPE (rel->r_info);
8412 /* If this section has old-style __tls_get_addr calls
8413 without marker relocs, then check that each
8414 __tls_get_addr call reloc is preceded by a reloc
8415 that conceivably belongs to the __tls_get_addr arg
8416 setup insn. If we don't find matching arg setup
8417 relocs, don't do any tls optimization. */
8418 if (pass == 0
8419 && sec->has_tls_get_addr_call
8420 && h != NULL
8421 && (h == &htab->tls_get_addr->elf
8422 || h == &htab->tls_get_addr_fd->elf)
8423 && !found_tls_get_addr_arg
8424 && is_branch_reloc (r_type))
8425 {
8426 info->callbacks->minfo (_("%H __tls_get_addr lost arg, "
8427 "TLS optimization disabled\n"),
8428 ibfd, sec, rel->r_offset);
8429 ret = TRUE;
8430 goto err_free_rel;
8431 }
8432
8433 found_tls_get_addr_arg = 0;
8434 switch (r_type)
8435 {
8436 case R_PPC64_GOT_TLSLD16:
8437 case R_PPC64_GOT_TLSLD16_LO:
8438 expecting_tls_get_addr = 1;
8439 found_tls_get_addr_arg = 1;
8440 /* Fall thru */
8441
8442 case R_PPC64_GOT_TLSLD16_HI:
8443 case R_PPC64_GOT_TLSLD16_HA:
8444 /* These relocs should never be against a symbol
8445 defined in a shared lib. Leave them alone if
8446 that turns out to be the case. */
8447 if (!is_local)
8448 continue;
8449
8450 /* LD -> LE */
8451 tls_set = 0;
8452 tls_clear = TLS_LD;
8453 tls_type = TLS_TLS | TLS_LD;
8454 break;
8455
8456 case R_PPC64_GOT_TLSGD16:
8457 case R_PPC64_GOT_TLSGD16_LO:
8458 expecting_tls_get_addr = 1;
8459 found_tls_get_addr_arg = 1;
8460 /* Fall thru */
8461
8462 case R_PPC64_GOT_TLSGD16_HI:
8463 case R_PPC64_GOT_TLSGD16_HA:
8464 if (ok_tprel)
8465 /* GD -> LE */
8466 tls_set = 0;
8467 else
8468 /* GD -> IE */
8469 tls_set = TLS_TLS | TLS_TPRELGD;
8470 tls_clear = TLS_GD;
8471 tls_type = TLS_TLS | TLS_GD;
8472 break;
8473
8474 case R_PPC64_GOT_TPREL16_DS:
8475 case R_PPC64_GOT_TPREL16_LO_DS:
8476 case R_PPC64_GOT_TPREL16_HI:
8477 case R_PPC64_GOT_TPREL16_HA:
8478 if (ok_tprel)
8479 {
8480 /* IE -> LE */
8481 tls_set = 0;
8482 tls_clear = TLS_TPREL;
8483 tls_type = TLS_TLS | TLS_TPREL;
8484 break;
8485 }
8486 continue;
8487
8488 case R_PPC64_TLSGD:
8489 case R_PPC64_TLSLD:
8490 found_tls_get_addr_arg = 1;
8491 /* Fall thru */
8492
8493 case R_PPC64_TLS:
8494 case R_PPC64_TOC16:
8495 case R_PPC64_TOC16_LO:
8496 if (sym_sec == NULL || sym_sec != toc)
8497 continue;
8498
8499 /* Mark this toc entry as referenced by a TLS
8500 code sequence. We can do that now in the
8501 case of R_PPC64_TLS, and after checking for
8502 tls_get_addr for the TOC16 relocs. */
8503 if (toc_ref == NULL)
8504 toc_ref = bfd_zmalloc (toc->output_section->rawsize / 8);
8505 if (toc_ref == NULL)
8506 goto err_free_rel;
8507
8508 if (h != NULL)
8509 value = h->root.u.def.value;
8510 else
8511 value = sym->st_value;
8512 value += rel->r_addend;
8513 if (value % 8 != 0)
8514 continue;
8515 BFD_ASSERT (value < toc->size
8516 && toc->output_offset % 8 == 0);
8517 toc_ref_index = (value + toc->output_offset) / 8;
8518 if (r_type == R_PPC64_TLS
8519 || r_type == R_PPC64_TLSGD
8520 || r_type == R_PPC64_TLSLD)
8521 {
8522 toc_ref[toc_ref_index] = 1;
8523 continue;
8524 }
8525
8526 if (pass != 0 && toc_ref[toc_ref_index] == 0)
8527 continue;
8528
8529 tls_set = 0;
8530 tls_clear = 0;
8531 expecting_tls_get_addr = 2;
8532 break;
8533
8534 case R_PPC64_TPREL64:
8535 if (pass == 0
8536 || sec != toc
8537 || toc_ref == NULL
8538 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
8539 continue;
8540 if (ok_tprel)
8541 {
8542 /* IE -> LE */
8543 tls_set = TLS_EXPLICIT;
8544 tls_clear = TLS_TPREL;
8545 break;
8546 }
8547 continue;
8548
8549 case R_PPC64_DTPMOD64:
8550 if (pass == 0
8551 || sec != toc
8552 || toc_ref == NULL
8553 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
8554 continue;
8555 if (rel + 1 < relend
8556 && (rel[1].r_info
8557 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
8558 && rel[1].r_offset == rel->r_offset + 8)
8559 {
8560 if (ok_tprel)
8561 /* GD -> LE */
8562 tls_set = TLS_EXPLICIT | TLS_GD;
8563 else
8564 /* GD -> IE */
8565 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
8566 tls_clear = TLS_GD;
8567 }
8568 else
8569 {
8570 if (!is_local)
8571 continue;
8572
8573 /* LD -> LE */
8574 tls_set = TLS_EXPLICIT;
8575 tls_clear = TLS_LD;
8576 }
8577 break;
8578
8579 default:
8580 continue;
8581 }
8582
8583 if (pass == 0)
8584 {
8585 if (!expecting_tls_get_addr
8586 || !sec->has_tls_get_addr_call)
8587 continue;
8588
8589 if (rel + 1 < relend
8590 && branch_reloc_hash_match (ibfd, rel + 1,
8591 htab->tls_get_addr,
8592 htab->tls_get_addr_fd))
8593 {
8594 if (expecting_tls_get_addr == 2)
8595 {
8596 /* Check for toc tls entries. */
8597 unsigned char *toc_tls;
8598 int retval;
8599
8600 retval = get_tls_mask (&toc_tls, NULL, NULL,
8601 &locsyms,
8602 rel, ibfd);
8603 if (retval == 0)
8604 goto err_free_rel;
8605 if (toc_tls != NULL)
8606 {
8607 if ((*toc_tls & (TLS_GD | TLS_LD)) != 0)
8608 found_tls_get_addr_arg = 1;
8609 if (retval > 1)
8610 toc_ref[toc_ref_index] = 1;
8611 }
8612 }
8613 continue;
8614 }
8615
8616 if (expecting_tls_get_addr != 1)
8617 continue;
8618
8619 /* Uh oh, we didn't find the expected call. We
8620 could just mark this symbol to exclude it
8621 from tls optimization but it's safer to skip
8622 the entire optimization. */
8623 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
8624 "TLS optimization disabled\n"),
8625 ibfd, sec, rel->r_offset);
8626 ret = TRUE;
8627 goto err_free_rel;
8628 }
8629
8630 if (expecting_tls_get_addr && htab->tls_get_addr != NULL)
8631 {
8632 struct plt_entry *ent;
8633 for (ent = htab->tls_get_addr->elf.plt.plist;
8634 ent != NULL;
8635 ent = ent->next)
8636 if (ent->addend == 0)
8637 {
8638 if (ent->plt.refcount > 0)
8639 {
8640 ent->plt.refcount -= 1;
8641 expecting_tls_get_addr = 0;
8642 }
8643 break;
8644 }
8645 }
8646
8647 if (expecting_tls_get_addr && htab->tls_get_addr_fd != NULL)
8648 {
8649 struct plt_entry *ent;
8650 for (ent = htab->tls_get_addr_fd->elf.plt.plist;
8651 ent != NULL;
8652 ent = ent->next)
8653 if (ent->addend == 0)
8654 {
8655 if (ent->plt.refcount > 0)
8656 ent->plt.refcount -= 1;
8657 break;
8658 }
8659 }
8660
8661 if (tls_clear == 0)
8662 continue;
8663
8664 if ((tls_set & TLS_EXPLICIT) == 0)
8665 {
8666 struct got_entry *ent;
8667
8668 /* Adjust got entry for this reloc. */
8669 if (h != NULL)
8670 ent = h->got.glist;
8671 else
8672 ent = elf_local_got_ents (ibfd)[r_symndx];
8673
8674 for (; ent != NULL; ent = ent->next)
8675 if (ent->addend == rel->r_addend
8676 && ent->owner == ibfd
8677 && ent->tls_type == tls_type)
8678 break;
8679 if (ent == NULL)
8680 abort ();
8681
8682 if (tls_set == 0)
8683 {
8684 /* We managed to get rid of a got entry. */
8685 if (ent->got.refcount > 0)
8686 ent->got.refcount -= 1;
8687 }
8688 }
8689 else
8690 {
8691 /* If we got rid of a DTPMOD/DTPREL reloc pair then
8692 we'll lose one or two dyn relocs. */
8693 if (!dec_dynrel_count (rel->r_info, sec, info,
8694 NULL, h, sym))
8695 return FALSE;
8696
8697 if (tls_set == (TLS_EXPLICIT | TLS_GD))
8698 {
8699 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
8700 NULL, h, sym))
8701 return FALSE;
8702 }
8703 }
8704
8705 *tls_mask |= tls_set;
8706 *tls_mask &= ~tls_clear;
8707 }
8708
8709 if (elf_section_data (sec)->relocs != relstart)
8710 free (relstart);
8711 }
8712
8713 if (locsyms != NULL
8714 && (elf_symtab_hdr (ibfd).contents != (unsigned char *) locsyms))
8715 {
8716 if (!info->keep_memory)
8717 free (locsyms);
8718 else
8719 elf_symtab_hdr (ibfd).contents = (unsigned char *) locsyms;
8720 }
8721 }
8722
8723 if (toc_ref != NULL)
8724 free (toc_ref);
8725 return TRUE;
8726 }
8727
8728 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
8729 the values of any global symbols in a toc section that has been
8730 edited. Globals in toc sections should be a rarity, so this function
8731 sets a flag if any are found in toc sections other than the one just
8732 edited, so that futher hash table traversals can be avoided. */
8733
8734 struct adjust_toc_info
8735 {
8736 asection *toc;
8737 unsigned long *skip;
8738 bfd_boolean global_toc_syms;
8739 };
8740
8741 enum toc_skip_enum { ref_from_discarded = 1, can_optimize = 2 };
8742
8743 static bfd_boolean
8744 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
8745 {
8746 struct ppc_link_hash_entry *eh;
8747 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
8748 unsigned long i;
8749
8750 if (h->root.type != bfd_link_hash_defined
8751 && h->root.type != bfd_link_hash_defweak)
8752 return TRUE;
8753
8754 eh = (struct ppc_link_hash_entry *) h;
8755 if (eh->adjust_done)
8756 return TRUE;
8757
8758 if (eh->elf.root.u.def.section == toc_inf->toc)
8759 {
8760 if (eh->elf.root.u.def.value > toc_inf->toc->rawsize)
8761 i = toc_inf->toc->rawsize >> 3;
8762 else
8763 i = eh->elf.root.u.def.value >> 3;
8764
8765 if ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0)
8766 {
8767 (*_bfd_error_handler)
8768 (_("%s defined on removed toc entry"), eh->elf.root.root.string);
8769 do
8770 ++i;
8771 while ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0);
8772 eh->elf.root.u.def.value = (bfd_vma) i << 3;
8773 }
8774
8775 eh->elf.root.u.def.value -= toc_inf->skip[i];
8776 eh->adjust_done = 1;
8777 }
8778 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
8779 toc_inf->global_toc_syms = TRUE;
8780
8781 return TRUE;
8782 }
8783
8784 /* Return TRUE iff INSN is one we expect on a _LO variety toc/got reloc. */
8785
8786 static bfd_boolean
8787 ok_lo_toc_insn (unsigned int insn)
8788 {
8789 return ((insn & (0x3f << 26)) == 14u << 26 /* addi */
8790 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
8791 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
8792 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
8793 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
8794 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
8795 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
8796 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
8797 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
8798 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
8799 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
8800 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
8801 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
8802 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
8803 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
8804 && (insn & 3) != 1)
8805 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
8806 && ((insn & 3) == 0 || (insn & 3) == 3))
8807 || (insn & (0x3f << 26)) == 12u << 26 /* addic */);
8808 }
8809
8810 /* Examine all relocs referencing .toc sections in order to remove
8811 unused .toc entries. */
8812
8813 bfd_boolean
8814 ppc64_elf_edit_toc (struct bfd_link_info *info)
8815 {
8816 bfd *ibfd;
8817 struct adjust_toc_info toc_inf;
8818 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8819
8820 htab->do_toc_opt = 1;
8821 toc_inf.global_toc_syms = TRUE;
8822 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
8823 {
8824 asection *toc, *sec;
8825 Elf_Internal_Shdr *symtab_hdr;
8826 Elf_Internal_Sym *local_syms;
8827 Elf_Internal_Rela *relstart, *rel, *toc_relocs;
8828 unsigned long *skip, *drop;
8829 unsigned char *used;
8830 unsigned char *keep, last, some_unused;
8831
8832 if (!is_ppc64_elf (ibfd))
8833 continue;
8834
8835 toc = bfd_get_section_by_name (ibfd, ".toc");
8836 if (toc == NULL
8837 || toc->size == 0
8838 || toc->sec_info_type == SEC_INFO_TYPE_JUST_SYMS
8839 || discarded_section (toc))
8840 continue;
8841
8842 toc_relocs = NULL;
8843 local_syms = NULL;
8844 symtab_hdr = &elf_symtab_hdr (ibfd);
8845
8846 /* Look at sections dropped from the final link. */
8847 skip = NULL;
8848 relstart = NULL;
8849 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8850 {
8851 if (sec->reloc_count == 0
8852 || !discarded_section (sec)
8853 || get_opd_info (sec)
8854 || (sec->flags & SEC_ALLOC) == 0
8855 || (sec->flags & SEC_DEBUGGING) != 0)
8856 continue;
8857
8858 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
8859 if (relstart == NULL)
8860 goto error_ret;
8861
8862 /* Run through the relocs to see which toc entries might be
8863 unused. */
8864 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8865 {
8866 enum elf_ppc64_reloc_type r_type;
8867 unsigned long r_symndx;
8868 asection *sym_sec;
8869 struct elf_link_hash_entry *h;
8870 Elf_Internal_Sym *sym;
8871 bfd_vma val;
8872
8873 r_type = ELF64_R_TYPE (rel->r_info);
8874 switch (r_type)
8875 {
8876 default:
8877 continue;
8878
8879 case R_PPC64_TOC16:
8880 case R_PPC64_TOC16_LO:
8881 case R_PPC64_TOC16_HI:
8882 case R_PPC64_TOC16_HA:
8883 case R_PPC64_TOC16_DS:
8884 case R_PPC64_TOC16_LO_DS:
8885 break;
8886 }
8887
8888 r_symndx = ELF64_R_SYM (rel->r_info);
8889 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8890 r_symndx, ibfd))
8891 goto error_ret;
8892
8893 if (sym_sec != toc)
8894 continue;
8895
8896 if (h != NULL)
8897 val = h->root.u.def.value;
8898 else
8899 val = sym->st_value;
8900 val += rel->r_addend;
8901
8902 if (val >= toc->size)
8903 continue;
8904
8905 /* Anything in the toc ought to be aligned to 8 bytes.
8906 If not, don't mark as unused. */
8907 if (val & 7)
8908 continue;
8909
8910 if (skip == NULL)
8911 {
8912 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
8913 if (skip == NULL)
8914 goto error_ret;
8915 }
8916
8917 skip[val >> 3] = ref_from_discarded;
8918 }
8919
8920 if (elf_section_data (sec)->relocs != relstart)
8921 free (relstart);
8922 }
8923
8924 /* For largetoc loads of address constants, we can convert
8925 . addis rx,2,addr@got@ha
8926 . ld ry,addr@got@l(rx)
8927 to
8928 . addis rx,2,addr@toc@ha
8929 . addi ry,rx,addr@toc@l
8930 when addr is within 2G of the toc pointer. This then means
8931 that the word storing "addr" in the toc is no longer needed. */
8932
8933 if (!ppc64_elf_tdata (ibfd)->has_small_toc_reloc
8934 && toc->output_section->rawsize < (bfd_vma) 1 << 31
8935 && toc->reloc_count != 0)
8936 {
8937 /* Read toc relocs. */
8938 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
8939 info->keep_memory);
8940 if (toc_relocs == NULL)
8941 goto error_ret;
8942
8943 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
8944 {
8945 enum elf_ppc64_reloc_type r_type;
8946 unsigned long r_symndx;
8947 asection *sym_sec;
8948 struct elf_link_hash_entry *h;
8949 Elf_Internal_Sym *sym;
8950 bfd_vma val, addr;
8951
8952 r_type = ELF64_R_TYPE (rel->r_info);
8953 if (r_type != R_PPC64_ADDR64)
8954 continue;
8955
8956 r_symndx = ELF64_R_SYM (rel->r_info);
8957 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8958 r_symndx, ibfd))
8959 goto error_ret;
8960
8961 if (sym_sec == NULL
8962 || sym_sec->output_section == NULL
8963 || discarded_section (sym_sec))
8964 continue;
8965
8966 if (!SYMBOL_REFERENCES_LOCAL (info, h))
8967 continue;
8968
8969 if (h != NULL)
8970 {
8971 if (h->type == STT_GNU_IFUNC)
8972 continue;
8973 val = h->root.u.def.value;
8974 }
8975 else
8976 {
8977 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
8978 continue;
8979 val = sym->st_value;
8980 }
8981 val += rel->r_addend;
8982 val += sym_sec->output_section->vma + sym_sec->output_offset;
8983
8984 /* We don't yet know the exact toc pointer value, but we
8985 know it will be somewhere in the toc section. Don't
8986 optimize if the difference from any possible toc
8987 pointer is outside [ff..f80008000, 7fff7fff]. */
8988 addr = toc->output_section->vma + TOC_BASE_OFF;
8989 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
8990 continue;
8991
8992 addr = toc->output_section->vma + toc->output_section->rawsize;
8993 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
8994 continue;
8995
8996 if (skip == NULL)
8997 {
8998 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
8999 if (skip == NULL)
9000 goto error_ret;
9001 }
9002
9003 skip[rel->r_offset >> 3]
9004 |= can_optimize | ((rel - toc_relocs) << 2);
9005 }
9006 }
9007
9008 if (skip == NULL)
9009 continue;
9010
9011 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
9012 if (used == NULL)
9013 {
9014 error_ret:
9015 if (local_syms != NULL
9016 && symtab_hdr->contents != (unsigned char *) local_syms)
9017 free (local_syms);
9018 if (sec != NULL
9019 && relstart != NULL
9020 && elf_section_data (sec)->relocs != relstart)
9021 free (relstart);
9022 if (toc_relocs != NULL
9023 && elf_section_data (toc)->relocs != toc_relocs)
9024 free (toc_relocs);
9025 if (skip != NULL)
9026 free (skip);
9027 return FALSE;
9028 }
9029
9030 /* Now check all kept sections that might reference the toc.
9031 Check the toc itself last. */
9032 for (sec = (ibfd->sections == toc && toc->next ? toc->next
9033 : ibfd->sections);
9034 sec != NULL;
9035 sec = (sec == toc ? NULL
9036 : sec->next == NULL ? toc
9037 : sec->next == toc && toc->next ? toc->next
9038 : sec->next))
9039 {
9040 int repeat;
9041
9042 if (sec->reloc_count == 0
9043 || discarded_section (sec)
9044 || get_opd_info (sec)
9045 || (sec->flags & SEC_ALLOC) == 0
9046 || (sec->flags & SEC_DEBUGGING) != 0)
9047 continue;
9048
9049 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
9050 info->keep_memory);
9051 if (relstart == NULL)
9052 {
9053 free (used);
9054 goto error_ret;
9055 }
9056
9057 /* Mark toc entries referenced as used. */
9058 do
9059 {
9060 repeat = 0;
9061 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
9062 {
9063 enum elf_ppc64_reloc_type r_type;
9064 unsigned long r_symndx;
9065 asection *sym_sec;
9066 struct elf_link_hash_entry *h;
9067 Elf_Internal_Sym *sym;
9068 bfd_vma val;
9069 enum {no_check, check_lo, check_ha} insn_check;
9070
9071 r_type = ELF64_R_TYPE (rel->r_info);
9072 switch (r_type)
9073 {
9074 default:
9075 insn_check = no_check;
9076 break;
9077
9078 case R_PPC64_GOT_TLSLD16_HA:
9079 case R_PPC64_GOT_TLSGD16_HA:
9080 case R_PPC64_GOT_TPREL16_HA:
9081 case R_PPC64_GOT_DTPREL16_HA:
9082 case R_PPC64_GOT16_HA:
9083 case R_PPC64_TOC16_HA:
9084 insn_check = check_ha;
9085 break;
9086
9087 case R_PPC64_GOT_TLSLD16_LO:
9088 case R_PPC64_GOT_TLSGD16_LO:
9089 case R_PPC64_GOT_TPREL16_LO_DS:
9090 case R_PPC64_GOT_DTPREL16_LO_DS:
9091 case R_PPC64_GOT16_LO:
9092 case R_PPC64_GOT16_LO_DS:
9093 case R_PPC64_TOC16_LO:
9094 case R_PPC64_TOC16_LO_DS:
9095 insn_check = check_lo;
9096 break;
9097 }
9098
9099 if (insn_check != no_check)
9100 {
9101 bfd_vma off = rel->r_offset & ~3;
9102 unsigned char buf[4];
9103 unsigned int insn;
9104
9105 if (!bfd_get_section_contents (ibfd, sec, buf, off, 4))
9106 {
9107 free (used);
9108 goto error_ret;
9109 }
9110 insn = bfd_get_32 (ibfd, buf);
9111 if (insn_check == check_lo
9112 ? !ok_lo_toc_insn (insn)
9113 : ((insn & ((0x3f << 26) | 0x1f << 16))
9114 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */))
9115 {
9116 char str[12];
9117
9118 ppc64_elf_tdata (ibfd)->unexpected_toc_insn = 1;
9119 sprintf (str, "%#08x", insn);
9120 info->callbacks->einfo
9121 (_("%P: %H: toc optimization is not supported for"
9122 " %s instruction.\n"),
9123 ibfd, sec, rel->r_offset & ~3, str);
9124 }
9125 }
9126
9127 switch (r_type)
9128 {
9129 case R_PPC64_TOC16:
9130 case R_PPC64_TOC16_LO:
9131 case R_PPC64_TOC16_HI:
9132 case R_PPC64_TOC16_HA:
9133 case R_PPC64_TOC16_DS:
9134 case R_PPC64_TOC16_LO_DS:
9135 /* In case we're taking addresses of toc entries. */
9136 case R_PPC64_ADDR64:
9137 break;
9138
9139 default:
9140 continue;
9141 }
9142
9143 r_symndx = ELF64_R_SYM (rel->r_info);
9144 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9145 r_symndx, ibfd))
9146 {
9147 free (used);
9148 goto error_ret;
9149 }
9150
9151 if (sym_sec != toc)
9152 continue;
9153
9154 if (h != NULL)
9155 val = h->root.u.def.value;
9156 else
9157 val = sym->st_value;
9158 val += rel->r_addend;
9159
9160 if (val >= toc->size)
9161 continue;
9162
9163 if ((skip[val >> 3] & can_optimize) != 0)
9164 {
9165 bfd_vma off;
9166 unsigned char opc;
9167
9168 switch (r_type)
9169 {
9170 case R_PPC64_TOC16_HA:
9171 break;
9172
9173 case R_PPC64_TOC16_LO_DS:
9174 off = rel->r_offset;
9175 off += (bfd_big_endian (ibfd) ? -2 : 3);
9176 if (!bfd_get_section_contents (ibfd, sec, &opc,
9177 off, 1))
9178 {
9179 free (used);
9180 goto error_ret;
9181 }
9182 if ((opc & (0x3f << 2)) == (58u << 2))
9183 break;
9184 /* Fall thru */
9185
9186 default:
9187 /* Wrong sort of reloc, or not a ld. We may
9188 as well clear ref_from_discarded too. */
9189 skip[val >> 3] = 0;
9190 }
9191 }
9192
9193 if (sec != toc)
9194 used[val >> 3] = 1;
9195 /* For the toc section, we only mark as used if this
9196 entry itself isn't unused. */
9197 else if ((used[rel->r_offset >> 3]
9198 || !(skip[rel->r_offset >> 3] & ref_from_discarded))
9199 && !used[val >> 3])
9200 {
9201 /* Do all the relocs again, to catch reference
9202 chains. */
9203 repeat = 1;
9204 used[val >> 3] = 1;
9205 }
9206 }
9207 }
9208 while (repeat);
9209
9210 if (elf_section_data (sec)->relocs != relstart)
9211 free (relstart);
9212 }
9213
9214 /* Merge the used and skip arrays. Assume that TOC
9215 doublewords not appearing as either used or unused belong
9216 to to an entry more than one doubleword in size. */
9217 for (drop = skip, keep = used, last = 0, some_unused = 0;
9218 drop < skip + (toc->size + 7) / 8;
9219 ++drop, ++keep)
9220 {
9221 if (*keep)
9222 {
9223 *drop &= ~ref_from_discarded;
9224 if ((*drop & can_optimize) != 0)
9225 some_unused = 1;
9226 last = 0;
9227 }
9228 else if ((*drop & ref_from_discarded) != 0)
9229 {
9230 some_unused = 1;
9231 last = ref_from_discarded;
9232 }
9233 else
9234 *drop = last;
9235 }
9236
9237 free (used);
9238
9239 if (some_unused)
9240 {
9241 bfd_byte *contents, *src;
9242 unsigned long off;
9243 Elf_Internal_Sym *sym;
9244 bfd_boolean local_toc_syms = FALSE;
9245
9246 /* Shuffle the toc contents, and at the same time convert the
9247 skip array from booleans into offsets. */
9248 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
9249 goto error_ret;
9250
9251 elf_section_data (toc)->this_hdr.contents = contents;
9252
9253 for (src = contents, off = 0, drop = skip;
9254 src < contents + toc->size;
9255 src += 8, ++drop)
9256 {
9257 if ((*drop & (can_optimize | ref_from_discarded)) != 0)
9258 off += 8;
9259 else if (off != 0)
9260 {
9261 *drop = off;
9262 memcpy (src - off, src, 8);
9263 }
9264 }
9265 *drop = off;
9266 toc->rawsize = toc->size;
9267 toc->size = src - contents - off;
9268
9269 /* Adjust addends for relocs against the toc section sym,
9270 and optimize any accesses we can. */
9271 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
9272 {
9273 if (sec->reloc_count == 0
9274 || discarded_section (sec))
9275 continue;
9276
9277 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
9278 info->keep_memory);
9279 if (relstart == NULL)
9280 goto error_ret;
9281
9282 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
9283 {
9284 enum elf_ppc64_reloc_type r_type;
9285 unsigned long r_symndx;
9286 asection *sym_sec;
9287 struct elf_link_hash_entry *h;
9288 bfd_vma val;
9289
9290 r_type = ELF64_R_TYPE (rel->r_info);
9291 switch (r_type)
9292 {
9293 default:
9294 continue;
9295
9296 case R_PPC64_TOC16:
9297 case R_PPC64_TOC16_LO:
9298 case R_PPC64_TOC16_HI:
9299 case R_PPC64_TOC16_HA:
9300 case R_PPC64_TOC16_DS:
9301 case R_PPC64_TOC16_LO_DS:
9302 case R_PPC64_ADDR64:
9303 break;
9304 }
9305
9306 r_symndx = ELF64_R_SYM (rel->r_info);
9307 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9308 r_symndx, ibfd))
9309 goto error_ret;
9310
9311 if (sym_sec != toc)
9312 continue;
9313
9314 if (h != NULL)
9315 val = h->root.u.def.value;
9316 else
9317 {
9318 val = sym->st_value;
9319 if (val != 0)
9320 local_toc_syms = TRUE;
9321 }
9322
9323 val += rel->r_addend;
9324
9325 if (val > toc->rawsize)
9326 val = toc->rawsize;
9327 else if ((skip[val >> 3] & ref_from_discarded) != 0)
9328 continue;
9329 else if ((skip[val >> 3] & can_optimize) != 0)
9330 {
9331 Elf_Internal_Rela *tocrel
9332 = toc_relocs + (skip[val >> 3] >> 2);
9333 unsigned long tsym = ELF64_R_SYM (tocrel->r_info);
9334
9335 switch (r_type)
9336 {
9337 case R_PPC64_TOC16_HA:
9338 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_TOC16_HA);
9339 break;
9340
9341 case R_PPC64_TOC16_LO_DS:
9342 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_LO_DS_OPT);
9343 break;
9344
9345 default:
9346 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
9347 ppc_howto_init ();
9348 info->callbacks->einfo
9349 (_("%P: %H: %s references "
9350 "optimized away TOC entry\n"),
9351 ibfd, sec, rel->r_offset,
9352 ppc64_elf_howto_table[r_type]->name);
9353 bfd_set_error (bfd_error_bad_value);
9354 goto error_ret;
9355 }
9356 rel->r_addend = tocrel->r_addend;
9357 elf_section_data (sec)->relocs = relstart;
9358 continue;
9359 }
9360
9361 if (h != NULL || sym->st_value != 0)
9362 continue;
9363
9364 rel->r_addend -= skip[val >> 3];
9365 elf_section_data (sec)->relocs = relstart;
9366 }
9367
9368 if (elf_section_data (sec)->relocs != relstart)
9369 free (relstart);
9370 }
9371
9372 /* We shouldn't have local or global symbols defined in the TOC,
9373 but handle them anyway. */
9374 if (local_syms != NULL)
9375 for (sym = local_syms;
9376 sym < local_syms + symtab_hdr->sh_info;
9377 ++sym)
9378 if (sym->st_value != 0
9379 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
9380 {
9381 unsigned long i;
9382
9383 if (sym->st_value > toc->rawsize)
9384 i = toc->rawsize >> 3;
9385 else
9386 i = sym->st_value >> 3;
9387
9388 if ((skip[i] & (ref_from_discarded | can_optimize)) != 0)
9389 {
9390 if (local_toc_syms)
9391 (*_bfd_error_handler)
9392 (_("%s defined on removed toc entry"),
9393 bfd_elf_sym_name (ibfd, symtab_hdr, sym, NULL));
9394 do
9395 ++i;
9396 while ((skip[i] & (ref_from_discarded | can_optimize)));
9397 sym->st_value = (bfd_vma) i << 3;
9398 }
9399
9400 sym->st_value -= skip[i];
9401 symtab_hdr->contents = (unsigned char *) local_syms;
9402 }
9403
9404 /* Adjust any global syms defined in this toc input section. */
9405 if (toc_inf.global_toc_syms)
9406 {
9407 toc_inf.toc = toc;
9408 toc_inf.skip = skip;
9409 toc_inf.global_toc_syms = FALSE;
9410 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
9411 &toc_inf);
9412 }
9413
9414 if (toc->reloc_count != 0)
9415 {
9416 Elf_Internal_Shdr *rel_hdr;
9417 Elf_Internal_Rela *wrel;
9418 bfd_size_type sz;
9419
9420 /* Remove unused toc relocs, and adjust those we keep. */
9421 if (toc_relocs == NULL)
9422 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
9423 info->keep_memory);
9424 if (toc_relocs == NULL)
9425 goto error_ret;
9426
9427 wrel = toc_relocs;
9428 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
9429 if ((skip[rel->r_offset >> 3]
9430 & (ref_from_discarded | can_optimize)) == 0)
9431 {
9432 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
9433 wrel->r_info = rel->r_info;
9434 wrel->r_addend = rel->r_addend;
9435 ++wrel;
9436 }
9437 else if (!dec_dynrel_count (rel->r_info, toc, info,
9438 &local_syms, NULL, NULL))
9439 goto error_ret;
9440
9441 elf_section_data (toc)->relocs = toc_relocs;
9442 toc->reloc_count = wrel - toc_relocs;
9443 rel_hdr = _bfd_elf_single_rel_hdr (toc);
9444 sz = rel_hdr->sh_entsize;
9445 rel_hdr->sh_size = toc->reloc_count * sz;
9446 }
9447 }
9448 else if (toc_relocs != NULL
9449 && elf_section_data (toc)->relocs != toc_relocs)
9450 free (toc_relocs);
9451
9452 if (local_syms != NULL
9453 && symtab_hdr->contents != (unsigned char *) local_syms)
9454 {
9455 if (!info->keep_memory)
9456 free (local_syms);
9457 else
9458 symtab_hdr->contents = (unsigned char *) local_syms;
9459 }
9460 free (skip);
9461 }
9462
9463 return TRUE;
9464 }
9465
9466 /* Return true iff input section I references the TOC using
9467 instructions limited to +/-32k offsets. */
9468
9469 bfd_boolean
9470 ppc64_elf_has_small_toc_reloc (asection *i)
9471 {
9472 return (is_ppc64_elf (i->owner)
9473 && ppc64_elf_tdata (i->owner)->has_small_toc_reloc);
9474 }
9475
9476 /* Allocate space for one GOT entry. */
9477
9478 static void
9479 allocate_got (struct elf_link_hash_entry *h,
9480 struct bfd_link_info *info,
9481 struct got_entry *gent)
9482 {
9483 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9484 bfd_boolean dyn;
9485 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
9486 int entsize = (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)
9487 ? 16 : 8);
9488 int rentsize = (gent->tls_type & eh->tls_mask & TLS_GD
9489 ? 2 : 1) * sizeof (Elf64_External_Rela);
9490 asection *got = ppc64_elf_tdata (gent->owner)->got;
9491
9492 gent->got.offset = got->size;
9493 got->size += entsize;
9494
9495 dyn = htab->elf.dynamic_sections_created;
9496 if (h->type == STT_GNU_IFUNC)
9497 {
9498 htab->elf.irelplt->size += rentsize;
9499 htab->got_reli_size += rentsize;
9500 }
9501 else if ((bfd_link_pic (info)
9502 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
9503 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
9504 || h->root.type != bfd_link_hash_undefweak))
9505 {
9506 asection *relgot = ppc64_elf_tdata (gent->owner)->relgot;
9507 relgot->size += rentsize;
9508 }
9509 }
9510
9511 /* This function merges got entries in the same toc group. */
9512
9513 static void
9514 merge_got_entries (struct got_entry **pent)
9515 {
9516 struct got_entry *ent, *ent2;
9517
9518 for (ent = *pent; ent != NULL; ent = ent->next)
9519 if (!ent->is_indirect)
9520 for (ent2 = ent->next; ent2 != NULL; ent2 = ent2->next)
9521 if (!ent2->is_indirect
9522 && ent2->addend == ent->addend
9523 && ent2->tls_type == ent->tls_type
9524 && elf_gp (ent2->owner) == elf_gp (ent->owner))
9525 {
9526 ent2->is_indirect = TRUE;
9527 ent2->got.ent = ent;
9528 }
9529 }
9530
9531 /* Allocate space in .plt, .got and associated reloc sections for
9532 dynamic relocs. */
9533
9534 static bfd_boolean
9535 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
9536 {
9537 struct bfd_link_info *info;
9538 struct ppc_link_hash_table *htab;
9539 asection *s;
9540 struct ppc_link_hash_entry *eh;
9541 struct elf_dyn_relocs *p;
9542 struct got_entry **pgent, *gent;
9543
9544 if (h->root.type == bfd_link_hash_indirect)
9545 return TRUE;
9546
9547 info = (struct bfd_link_info *) inf;
9548 htab = ppc_hash_table (info);
9549 if (htab == NULL)
9550 return FALSE;
9551
9552 if ((htab->elf.dynamic_sections_created
9553 && h->dynindx != -1
9554 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, bfd_link_pic (info), h))
9555 || h->type == STT_GNU_IFUNC)
9556 {
9557 struct plt_entry *pent;
9558 bfd_boolean doneone = FALSE;
9559 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
9560 if (pent->plt.refcount > 0)
9561 {
9562 if (!htab->elf.dynamic_sections_created
9563 || h->dynindx == -1)
9564 {
9565 s = htab->elf.iplt;
9566 pent->plt.offset = s->size;
9567 s->size += PLT_ENTRY_SIZE (htab);
9568 s = htab->elf.irelplt;
9569 }
9570 else
9571 {
9572 /* If this is the first .plt entry, make room for the special
9573 first entry. */
9574 s = htab->elf.splt;
9575 if (s->size == 0)
9576 s->size += PLT_INITIAL_ENTRY_SIZE (htab);
9577
9578 pent->plt.offset = s->size;
9579
9580 /* Make room for this entry. */
9581 s->size += PLT_ENTRY_SIZE (htab);
9582
9583 /* Make room for the .glink code. */
9584 s = htab->glink;
9585 if (s->size == 0)
9586 s->size += GLINK_CALL_STUB_SIZE;
9587 if (htab->opd_abi)
9588 {
9589 /* We need bigger stubs past index 32767. */
9590 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
9591 s->size += 4;
9592 s->size += 2*4;
9593 }
9594 else
9595 s->size += 4;
9596
9597 /* We also need to make an entry in the .rela.plt section. */
9598 s = htab->elf.srelplt;
9599 }
9600 s->size += sizeof (Elf64_External_Rela);
9601 doneone = TRUE;
9602 }
9603 else
9604 pent->plt.offset = (bfd_vma) -1;
9605 if (!doneone)
9606 {
9607 h->plt.plist = NULL;
9608 h->needs_plt = 0;
9609 }
9610 }
9611 else
9612 {
9613 h->plt.plist = NULL;
9614 h->needs_plt = 0;
9615 }
9616
9617 eh = (struct ppc_link_hash_entry *) h;
9618 /* Run through the TLS GD got entries first if we're changing them
9619 to TPREL. */
9620 if ((eh->tls_mask & TLS_TPRELGD) != 0)
9621 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9622 if (gent->got.refcount > 0
9623 && (gent->tls_type & TLS_GD) != 0)
9624 {
9625 /* This was a GD entry that has been converted to TPREL. If
9626 there happens to be a TPREL entry we can use that one. */
9627 struct got_entry *ent;
9628 for (ent = h->got.glist; ent != NULL; ent = ent->next)
9629 if (ent->got.refcount > 0
9630 && (ent->tls_type & TLS_TPREL) != 0
9631 && ent->addend == gent->addend
9632 && ent->owner == gent->owner)
9633 {
9634 gent->got.refcount = 0;
9635 break;
9636 }
9637
9638 /* If not, then we'll be using our own TPREL entry. */
9639 if (gent->got.refcount != 0)
9640 gent->tls_type = TLS_TLS | TLS_TPREL;
9641 }
9642
9643 /* Remove any list entry that won't generate a word in the GOT before
9644 we call merge_got_entries. Otherwise we risk merging to empty
9645 entries. */
9646 pgent = &h->got.glist;
9647 while ((gent = *pgent) != NULL)
9648 if (gent->got.refcount > 0)
9649 {
9650 if ((gent->tls_type & TLS_LD) != 0
9651 && !h->def_dynamic)
9652 {
9653 ppc64_tlsld_got (gent->owner)->got.refcount += 1;
9654 *pgent = gent->next;
9655 }
9656 else
9657 pgent = &gent->next;
9658 }
9659 else
9660 *pgent = gent->next;
9661
9662 if (!htab->do_multi_toc)
9663 merge_got_entries (&h->got.glist);
9664
9665 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9666 if (!gent->is_indirect)
9667 {
9668 /* Make sure this symbol is output as a dynamic symbol.
9669 Undefined weak syms won't yet be marked as dynamic,
9670 nor will all TLS symbols. */
9671 if (h->dynindx == -1
9672 && !h->forced_local
9673 && h->type != STT_GNU_IFUNC
9674 && htab->elf.dynamic_sections_created)
9675 {
9676 if (! bfd_elf_link_record_dynamic_symbol (info, h))
9677 return FALSE;
9678 }
9679
9680 if (!is_ppc64_elf (gent->owner))
9681 abort ();
9682
9683 allocate_got (h, info, gent);
9684 }
9685
9686 if (eh->dyn_relocs == NULL
9687 || (!htab->elf.dynamic_sections_created
9688 && h->type != STT_GNU_IFUNC))
9689 return TRUE;
9690
9691 /* In the shared -Bsymbolic case, discard space allocated for
9692 dynamic pc-relative relocs against symbols which turn out to be
9693 defined in regular objects. For the normal shared case, discard
9694 space for relocs that have become local due to symbol visibility
9695 changes. */
9696
9697 if (bfd_link_pic (info))
9698 {
9699 /* Relocs that use pc_count are those that appear on a call insn,
9700 or certain REL relocs (see must_be_dyn_reloc) that can be
9701 generated via assembly. We want calls to protected symbols to
9702 resolve directly to the function rather than going via the plt.
9703 If people want function pointer comparisons to work as expected
9704 then they should avoid writing weird assembly. */
9705 if (SYMBOL_CALLS_LOCAL (info, h))
9706 {
9707 struct elf_dyn_relocs **pp;
9708
9709 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
9710 {
9711 p->count -= p->pc_count;
9712 p->pc_count = 0;
9713 if (p->count == 0)
9714 *pp = p->next;
9715 else
9716 pp = &p->next;
9717 }
9718 }
9719
9720 /* Also discard relocs on undefined weak syms with non-default
9721 visibility. */
9722 if (eh->dyn_relocs != NULL
9723 && h->root.type == bfd_link_hash_undefweak)
9724 {
9725 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
9726 eh->dyn_relocs = NULL;
9727
9728 /* Make sure this symbol is output as a dynamic symbol.
9729 Undefined weak syms won't yet be marked as dynamic. */
9730 else if (h->dynindx == -1
9731 && !h->forced_local)
9732 {
9733 if (! bfd_elf_link_record_dynamic_symbol (info, h))
9734 return FALSE;
9735 }
9736 }
9737 }
9738 else if (h->type == STT_GNU_IFUNC)
9739 {
9740 if (!h->non_got_ref)
9741 eh->dyn_relocs = NULL;
9742 }
9743 else if (ELIMINATE_COPY_RELOCS)
9744 {
9745 /* For the non-shared case, discard space for relocs against
9746 symbols which turn out to need copy relocs or are not
9747 dynamic. */
9748
9749 if (!h->non_got_ref
9750 && !h->def_regular)
9751 {
9752 /* Make sure this symbol is output as a dynamic symbol.
9753 Undefined weak syms won't yet be marked as dynamic. */
9754 if (h->dynindx == -1
9755 && !h->forced_local)
9756 {
9757 if (! bfd_elf_link_record_dynamic_symbol (info, h))
9758 return FALSE;
9759 }
9760
9761 /* If that succeeded, we know we'll be keeping all the
9762 relocs. */
9763 if (h->dynindx != -1)
9764 goto keep;
9765 }
9766
9767 eh->dyn_relocs = NULL;
9768
9769 keep: ;
9770 }
9771
9772 /* Finally, allocate space. */
9773 for (p = eh->dyn_relocs; p != NULL; p = p->next)
9774 {
9775 asection *sreloc = elf_section_data (p->sec)->sreloc;
9776 if (eh->elf.type == STT_GNU_IFUNC)
9777 sreloc = htab->elf.irelplt;
9778 sreloc->size += p->count * sizeof (Elf64_External_Rela);
9779 }
9780
9781 return TRUE;
9782 }
9783
9784 /* Called via elf_link_hash_traverse from ppc64_elf_size_dynamic_sections
9785 to set up space for global entry stubs. These are put in glink,
9786 after the branch table. */
9787
9788 static bfd_boolean
9789 size_global_entry_stubs (struct elf_link_hash_entry *h, void *inf)
9790 {
9791 struct bfd_link_info *info;
9792 struct ppc_link_hash_table *htab;
9793 struct plt_entry *pent;
9794 asection *s;
9795
9796 if (h->root.type == bfd_link_hash_indirect)
9797 return TRUE;
9798
9799 if (!h->pointer_equality_needed)
9800 return TRUE;
9801
9802 if (h->def_regular)
9803 return TRUE;
9804
9805 info = inf;
9806 htab = ppc_hash_table (info);
9807 if (htab == NULL)
9808 return FALSE;
9809
9810 s = htab->glink;
9811 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
9812 if (pent->plt.offset != (bfd_vma) -1
9813 && pent->addend == 0)
9814 {
9815 /* For ELFv2, if this symbol is not defined in a regular file
9816 and we are not generating a shared library or pie, then we
9817 need to define the symbol in the executable on a call stub.
9818 This is to avoid text relocations. */
9819 s->size = (s->size + 15) & -16;
9820 h->root.u.def.section = s;
9821 h->root.u.def.value = s->size;
9822 s->size += 16;
9823 break;
9824 }
9825 return TRUE;
9826 }
9827
9828 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
9829 read-only sections. */
9830
9831 static bfd_boolean
9832 maybe_set_textrel (struct elf_link_hash_entry *h, void *info)
9833 {
9834 if (h->root.type == bfd_link_hash_indirect)
9835 return TRUE;
9836
9837 if (readonly_dynrelocs (h))
9838 {
9839 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
9840
9841 /* Not an error, just cut short the traversal. */
9842 return FALSE;
9843 }
9844 return TRUE;
9845 }
9846
9847 /* Set the sizes of the dynamic sections. */
9848
9849 static bfd_boolean
9850 ppc64_elf_size_dynamic_sections (bfd *output_bfd,
9851 struct bfd_link_info *info)
9852 {
9853 struct ppc_link_hash_table *htab;
9854 bfd *dynobj;
9855 asection *s;
9856 bfd_boolean relocs;
9857 bfd *ibfd;
9858 struct got_entry *first_tlsld;
9859
9860 htab = ppc_hash_table (info);
9861 if (htab == NULL)
9862 return FALSE;
9863
9864 dynobj = htab->elf.dynobj;
9865 if (dynobj == NULL)
9866 abort ();
9867
9868 if (htab->elf.dynamic_sections_created)
9869 {
9870 /* Set the contents of the .interp section to the interpreter. */
9871 if (bfd_link_executable (info) && !info->nointerp)
9872 {
9873 s = bfd_get_linker_section (dynobj, ".interp");
9874 if (s == NULL)
9875 abort ();
9876 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
9877 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
9878 }
9879 }
9880
9881 /* Set up .got offsets for local syms, and space for local dynamic
9882 relocs. */
9883 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
9884 {
9885 struct got_entry **lgot_ents;
9886 struct got_entry **end_lgot_ents;
9887 struct plt_entry **local_plt;
9888 struct plt_entry **end_local_plt;
9889 unsigned char *lgot_masks;
9890 bfd_size_type locsymcount;
9891 Elf_Internal_Shdr *symtab_hdr;
9892
9893 if (!is_ppc64_elf (ibfd))
9894 continue;
9895
9896 for (s = ibfd->sections; s != NULL; s = s->next)
9897 {
9898 struct ppc_dyn_relocs *p;
9899
9900 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
9901 {
9902 if (!bfd_is_abs_section (p->sec)
9903 && bfd_is_abs_section (p->sec->output_section))
9904 {
9905 /* Input section has been discarded, either because
9906 it is a copy of a linkonce section or due to
9907 linker script /DISCARD/, so we'll be discarding
9908 the relocs too. */
9909 }
9910 else if (p->count != 0)
9911 {
9912 asection *srel = elf_section_data (p->sec)->sreloc;
9913 if (p->ifunc)
9914 srel = htab->elf.irelplt;
9915 srel->size += p->count * sizeof (Elf64_External_Rela);
9916 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
9917 info->flags |= DF_TEXTREL;
9918 }
9919 }
9920 }
9921
9922 lgot_ents = elf_local_got_ents (ibfd);
9923 if (!lgot_ents)
9924 continue;
9925
9926 symtab_hdr = &elf_symtab_hdr (ibfd);
9927 locsymcount = symtab_hdr->sh_info;
9928 end_lgot_ents = lgot_ents + locsymcount;
9929 local_plt = (struct plt_entry **) end_lgot_ents;
9930 end_local_plt = local_plt + locsymcount;
9931 lgot_masks = (unsigned char *) end_local_plt;
9932 s = ppc64_elf_tdata (ibfd)->got;
9933 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
9934 {
9935 struct got_entry **pent, *ent;
9936
9937 pent = lgot_ents;
9938 while ((ent = *pent) != NULL)
9939 if (ent->got.refcount > 0)
9940 {
9941 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
9942 {
9943 ppc64_tlsld_got (ibfd)->got.refcount += 1;
9944 *pent = ent->next;
9945 }
9946 else
9947 {
9948 unsigned int ent_size = 8;
9949 unsigned int rel_size = sizeof (Elf64_External_Rela);
9950
9951 ent->got.offset = s->size;
9952 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
9953 {
9954 ent_size *= 2;
9955 rel_size *= 2;
9956 }
9957 s->size += ent_size;
9958 if ((*lgot_masks & PLT_IFUNC) != 0)
9959 {
9960 htab->elf.irelplt->size += rel_size;
9961 htab->got_reli_size += rel_size;
9962 }
9963 else if (bfd_link_pic (info))
9964 {
9965 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
9966 srel->size += rel_size;
9967 }
9968 pent = &ent->next;
9969 }
9970 }
9971 else
9972 *pent = ent->next;
9973 }
9974
9975 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
9976 for (; local_plt < end_local_plt; ++local_plt)
9977 {
9978 struct plt_entry *ent;
9979
9980 for (ent = *local_plt; ent != NULL; ent = ent->next)
9981 if (ent->plt.refcount > 0)
9982 {
9983 s = htab->elf.iplt;
9984 ent->plt.offset = s->size;
9985 s->size += PLT_ENTRY_SIZE (htab);
9986
9987 htab->elf.irelplt->size += sizeof (Elf64_External_Rela);
9988 }
9989 else
9990 ent->plt.offset = (bfd_vma) -1;
9991 }
9992 }
9993
9994 /* Allocate global sym .plt and .got entries, and space for global
9995 sym dynamic relocs. */
9996 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
9997 /* Stash the end of glink branch table. */
9998 if (htab->glink != NULL)
9999 htab->glink->rawsize = htab->glink->size;
10000
10001 if (!htab->opd_abi && !bfd_link_pic (info))
10002 elf_link_hash_traverse (&htab->elf, size_global_entry_stubs, info);
10003
10004 first_tlsld = NULL;
10005 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
10006 {
10007 struct got_entry *ent;
10008
10009 if (!is_ppc64_elf (ibfd))
10010 continue;
10011
10012 ent = ppc64_tlsld_got (ibfd);
10013 if (ent->got.refcount > 0)
10014 {
10015 if (!htab->do_multi_toc && first_tlsld != NULL)
10016 {
10017 ent->is_indirect = TRUE;
10018 ent->got.ent = first_tlsld;
10019 }
10020 else
10021 {
10022 if (first_tlsld == NULL)
10023 first_tlsld = ent;
10024 s = ppc64_elf_tdata (ibfd)->got;
10025 ent->got.offset = s->size;
10026 ent->owner = ibfd;
10027 s->size += 16;
10028 if (bfd_link_pic (info))
10029 {
10030 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
10031 srel->size += sizeof (Elf64_External_Rela);
10032 }
10033 }
10034 }
10035 else
10036 ent->got.offset = (bfd_vma) -1;
10037 }
10038
10039 /* We now have determined the sizes of the various dynamic sections.
10040 Allocate memory for them. */
10041 relocs = FALSE;
10042 for (s = dynobj->sections; s != NULL; s = s->next)
10043 {
10044 if ((s->flags & SEC_LINKER_CREATED) == 0)
10045 continue;
10046
10047 if (s == htab->brlt || s == htab->relbrlt)
10048 /* These haven't been allocated yet; don't strip. */
10049 continue;
10050 else if (s == htab->elf.sgot
10051 || s == htab->elf.splt
10052 || s == htab->elf.iplt
10053 || s == htab->glink
10054 || s == htab->dynbss)
10055 {
10056 /* Strip this section if we don't need it; see the
10057 comment below. */
10058 }
10059 else if (s == htab->glink_eh_frame)
10060 {
10061 if (!bfd_is_abs_section (s->output_section))
10062 /* Not sized yet. */
10063 continue;
10064 }
10065 else if (CONST_STRNEQ (s->name, ".rela"))
10066 {
10067 if (s->size != 0)
10068 {
10069 if (s != htab->elf.srelplt)
10070 relocs = TRUE;
10071
10072 /* We use the reloc_count field as a counter if we need
10073 to copy relocs into the output file. */
10074 s->reloc_count = 0;
10075 }
10076 }
10077 else
10078 {
10079 /* It's not one of our sections, so don't allocate space. */
10080 continue;
10081 }
10082
10083 if (s->size == 0)
10084 {
10085 /* If we don't need this section, strip it from the
10086 output file. This is mostly to handle .rela.bss and
10087 .rela.plt. We must create both sections in
10088 create_dynamic_sections, because they must be created
10089 before the linker maps input sections to output
10090 sections. The linker does that before
10091 adjust_dynamic_symbol is called, and it is that
10092 function which decides whether anything needs to go
10093 into these sections. */
10094 s->flags |= SEC_EXCLUDE;
10095 continue;
10096 }
10097
10098 if ((s->flags & SEC_HAS_CONTENTS) == 0)
10099 continue;
10100
10101 /* Allocate memory for the section contents. We use bfd_zalloc
10102 here in case unused entries are not reclaimed before the
10103 section's contents are written out. This should not happen,
10104 but this way if it does we get a R_PPC64_NONE reloc in .rela
10105 sections instead of garbage.
10106 We also rely on the section contents being zero when writing
10107 the GOT. */
10108 s->contents = bfd_zalloc (dynobj, s->size);
10109 if (s->contents == NULL)
10110 return FALSE;
10111 }
10112
10113 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
10114 {
10115 if (!is_ppc64_elf (ibfd))
10116 continue;
10117
10118 s = ppc64_elf_tdata (ibfd)->got;
10119 if (s != NULL && s != htab->elf.sgot)
10120 {
10121 if (s->size == 0)
10122 s->flags |= SEC_EXCLUDE;
10123 else
10124 {
10125 s->contents = bfd_zalloc (ibfd, s->size);
10126 if (s->contents == NULL)
10127 return FALSE;
10128 }
10129 }
10130 s = ppc64_elf_tdata (ibfd)->relgot;
10131 if (s != NULL)
10132 {
10133 if (s->size == 0)
10134 s->flags |= SEC_EXCLUDE;
10135 else
10136 {
10137 s->contents = bfd_zalloc (ibfd, s->size);
10138 if (s->contents == NULL)
10139 return FALSE;
10140 relocs = TRUE;
10141 s->reloc_count = 0;
10142 }
10143 }
10144 }
10145
10146 if (htab->elf.dynamic_sections_created)
10147 {
10148 bfd_boolean tls_opt;
10149
10150 /* Add some entries to the .dynamic section. We fill in the
10151 values later, in ppc64_elf_finish_dynamic_sections, but we
10152 must add the entries now so that we get the correct size for
10153 the .dynamic section. The DT_DEBUG entry is filled in by the
10154 dynamic linker and used by the debugger. */
10155 #define add_dynamic_entry(TAG, VAL) \
10156 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
10157
10158 if (bfd_link_executable (info))
10159 {
10160 if (!add_dynamic_entry (DT_DEBUG, 0))
10161 return FALSE;
10162 }
10163
10164 if (htab->elf.splt != NULL && htab->elf.splt->size != 0)
10165 {
10166 if (!add_dynamic_entry (DT_PLTGOT, 0)
10167 || !add_dynamic_entry (DT_PLTRELSZ, 0)
10168 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
10169 || !add_dynamic_entry (DT_JMPREL, 0)
10170 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
10171 return FALSE;
10172 }
10173
10174 if (NO_OPD_RELOCS && abiversion (output_bfd) <= 1)
10175 {
10176 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
10177 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
10178 return FALSE;
10179 }
10180
10181 tls_opt = (htab->params->tls_get_addr_opt
10182 && htab->tls_get_addr_fd != NULL
10183 && htab->tls_get_addr_fd->elf.plt.plist != NULL);
10184 if (tls_opt || !htab->opd_abi)
10185 {
10186 if (!add_dynamic_entry (DT_PPC64_OPT, tls_opt ? PPC64_OPT_TLS : 0))
10187 return FALSE;
10188 }
10189
10190 if (relocs)
10191 {
10192 if (!add_dynamic_entry (DT_RELA, 0)
10193 || !add_dynamic_entry (DT_RELASZ, 0)
10194 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
10195 return FALSE;
10196
10197 /* If any dynamic relocs apply to a read-only section,
10198 then we need a DT_TEXTREL entry. */
10199 if ((info->flags & DF_TEXTREL) == 0)
10200 elf_link_hash_traverse (&htab->elf, maybe_set_textrel, info);
10201
10202 if ((info->flags & DF_TEXTREL) != 0)
10203 {
10204 if (!add_dynamic_entry (DT_TEXTREL, 0))
10205 return FALSE;
10206 }
10207 }
10208 }
10209 #undef add_dynamic_entry
10210
10211 return TRUE;
10212 }
10213
10214 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
10215
10216 static bfd_boolean
10217 ppc64_elf_hash_symbol (struct elf_link_hash_entry *h)
10218 {
10219 if (h->plt.plist != NULL
10220 && !h->def_regular
10221 && !h->pointer_equality_needed)
10222 return FALSE;
10223
10224 return _bfd_elf_hash_symbol (h);
10225 }
10226
10227 /* Determine the type of stub needed, if any, for a call. */
10228
10229 static inline enum ppc_stub_type
10230 ppc_type_of_stub (asection *input_sec,
10231 const Elf_Internal_Rela *rel,
10232 struct ppc_link_hash_entry **hash,
10233 struct plt_entry **plt_ent,
10234 bfd_vma destination,
10235 unsigned long local_off)
10236 {
10237 struct ppc_link_hash_entry *h = *hash;
10238 bfd_vma location;
10239 bfd_vma branch_offset;
10240 bfd_vma max_branch_offset;
10241 enum elf_ppc64_reloc_type r_type;
10242
10243 if (h != NULL)
10244 {
10245 struct plt_entry *ent;
10246 struct ppc_link_hash_entry *fdh = h;
10247 if (h->oh != NULL
10248 && h->oh->is_func_descriptor)
10249 {
10250 fdh = ppc_follow_link (h->oh);
10251 *hash = fdh;
10252 }
10253
10254 for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next)
10255 if (ent->addend == rel->r_addend
10256 && ent->plt.offset != (bfd_vma) -1)
10257 {
10258 *plt_ent = ent;
10259 return ppc_stub_plt_call;
10260 }
10261
10262 /* Here, we know we don't have a plt entry. If we don't have a
10263 either a defined function descriptor or a defined entry symbol
10264 in a regular object file, then it is pointless trying to make
10265 any other type of stub. */
10266 if (!is_static_defined (&fdh->elf)
10267 && !is_static_defined (&h->elf))
10268 return ppc_stub_none;
10269 }
10270 else if (elf_local_got_ents (input_sec->owner) != NULL)
10271 {
10272 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (input_sec->owner);
10273 struct plt_entry **local_plt = (struct plt_entry **)
10274 elf_local_got_ents (input_sec->owner) + symtab_hdr->sh_info;
10275 unsigned long r_symndx = ELF64_R_SYM (rel->r_info);
10276
10277 if (local_plt[r_symndx] != NULL)
10278 {
10279 struct plt_entry *ent;
10280
10281 for (ent = local_plt[r_symndx]; ent != NULL; ent = ent->next)
10282 if (ent->addend == rel->r_addend
10283 && ent->plt.offset != (bfd_vma) -1)
10284 {
10285 *plt_ent = ent;
10286 return ppc_stub_plt_call;
10287 }
10288 }
10289 }
10290
10291 /* Determine where the call point is. */
10292 location = (input_sec->output_offset
10293 + input_sec->output_section->vma
10294 + rel->r_offset);
10295
10296 branch_offset = destination - location;
10297 r_type = ELF64_R_TYPE (rel->r_info);
10298
10299 /* Determine if a long branch stub is needed. */
10300 max_branch_offset = 1 << 25;
10301 if (r_type != R_PPC64_REL24)
10302 max_branch_offset = 1 << 15;
10303
10304 if (branch_offset + max_branch_offset >= 2 * max_branch_offset - local_off)
10305 /* We need a stub. Figure out whether a long_branch or plt_branch
10306 is needed later. */
10307 return ppc_stub_long_branch;
10308
10309 return ppc_stub_none;
10310 }
10311
10312 /* With power7 weakly ordered memory model, it is possible for ld.so
10313 to update a plt entry in one thread and have another thread see a
10314 stale zero toc entry. To avoid this we need some sort of acquire
10315 barrier in the call stub. One solution is to make the load of the
10316 toc word seem to appear to depend on the load of the function entry
10317 word. Another solution is to test for r2 being zero, and branch to
10318 the appropriate glink entry if so.
10319
10320 . fake dep barrier compare
10321 . ld 12,xxx(2) ld 12,xxx(2)
10322 . mtctr 12 mtctr 12
10323 . xor 11,12,12 ld 2,xxx+8(2)
10324 . add 2,2,11 cmpldi 2,0
10325 . ld 2,xxx+8(2) bnectr+
10326 . bctr b <glink_entry>
10327
10328 The solution involving the compare turns out to be faster, so
10329 that's what we use unless the branch won't reach. */
10330
10331 #define ALWAYS_USE_FAKE_DEP 0
10332 #define ALWAYS_EMIT_R2SAVE 0
10333
10334 #define PPC_LO(v) ((v) & 0xffff)
10335 #define PPC_HI(v) (((v) >> 16) & 0xffff)
10336 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
10337
10338 static inline unsigned int
10339 plt_stub_size (struct ppc_link_hash_table *htab,
10340 struct ppc_stub_hash_entry *stub_entry,
10341 bfd_vma off)
10342 {
10343 unsigned size = 12;
10344
10345 if (ALWAYS_EMIT_R2SAVE
10346 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10347 size += 4;
10348 if (PPC_HA (off) != 0)
10349 size += 4;
10350 if (htab->opd_abi)
10351 {
10352 size += 4;
10353 if (htab->params->plt_static_chain)
10354 size += 4;
10355 if (htab->params->plt_thread_safe
10356 && htab->elf.dynamic_sections_created
10357 && stub_entry->h != NULL
10358 && stub_entry->h->elf.dynindx != -1)
10359 size += 8;
10360 if (PPC_HA (off + 8 + 8 * htab->params->plt_static_chain) != PPC_HA (off))
10361 size += 4;
10362 }
10363 if (stub_entry->h != NULL
10364 && (stub_entry->h == htab->tls_get_addr_fd
10365 || stub_entry->h == htab->tls_get_addr)
10366 && htab->params->tls_get_addr_opt)
10367 size += 13 * 4;
10368 return size;
10369 }
10370
10371 /* If this stub would cross fewer 2**plt_stub_align boundaries if we align,
10372 then return the padding needed to do so. */
10373 static inline unsigned int
10374 plt_stub_pad (struct ppc_link_hash_table *htab,
10375 struct ppc_stub_hash_entry *stub_entry,
10376 bfd_vma plt_off)
10377 {
10378 int stub_align = 1 << htab->params->plt_stub_align;
10379 unsigned stub_size = plt_stub_size (htab, stub_entry, plt_off);
10380 bfd_vma stub_off = stub_entry->group->stub_sec->size;
10381
10382 if (((stub_off + stub_size - 1) & -stub_align) - (stub_off & -stub_align)
10383 > ((stub_size - 1) & -stub_align))
10384 return stub_align - (stub_off & (stub_align - 1));
10385 return 0;
10386 }
10387
10388 /* Build a .plt call stub. */
10389
10390 static inline bfd_byte *
10391 build_plt_stub (struct ppc_link_hash_table *htab,
10392 struct ppc_stub_hash_entry *stub_entry,
10393 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
10394 {
10395 bfd *obfd = htab->params->stub_bfd;
10396 bfd_boolean plt_load_toc = htab->opd_abi;
10397 bfd_boolean plt_static_chain = htab->params->plt_static_chain;
10398 bfd_boolean plt_thread_safe = (htab->params->plt_thread_safe
10399 && htab->elf.dynamic_sections_created
10400 && stub_entry->h != NULL
10401 && stub_entry->h->elf.dynindx != -1);
10402 bfd_boolean use_fake_dep = plt_thread_safe;
10403 bfd_vma cmp_branch_off = 0;
10404
10405 if (!ALWAYS_USE_FAKE_DEP
10406 && plt_load_toc
10407 && plt_thread_safe
10408 && !((stub_entry->h == htab->tls_get_addr_fd
10409 || stub_entry->h == htab->tls_get_addr)
10410 && htab->params->tls_get_addr_opt))
10411 {
10412 bfd_vma pltoff = stub_entry->plt_ent->plt.offset & ~1;
10413 bfd_vma pltindex = ((pltoff - PLT_INITIAL_ENTRY_SIZE (htab))
10414 / PLT_ENTRY_SIZE (htab));
10415 bfd_vma glinkoff = GLINK_CALL_STUB_SIZE + pltindex * 8;
10416 bfd_vma to, from;
10417
10418 if (pltindex > 32768)
10419 glinkoff += (pltindex - 32768) * 4;
10420 to = (glinkoff
10421 + htab->glink->output_offset
10422 + htab->glink->output_section->vma);
10423 from = (p - stub_entry->group->stub_sec->contents
10424 + 4 * (ALWAYS_EMIT_R2SAVE
10425 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10426 + 4 * (PPC_HA (offset) != 0)
10427 + 4 * (PPC_HA (offset + 8 + 8 * plt_static_chain)
10428 != PPC_HA (offset))
10429 + 4 * (plt_static_chain != 0)
10430 + 20
10431 + stub_entry->group->stub_sec->output_offset
10432 + stub_entry->group->stub_sec->output_section->vma);
10433 cmp_branch_off = to - from;
10434 use_fake_dep = cmp_branch_off + (1 << 25) >= (1 << 26);
10435 }
10436
10437 if (PPC_HA (offset) != 0)
10438 {
10439 if (r != NULL)
10440 {
10441 if (ALWAYS_EMIT_R2SAVE
10442 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10443 r[0].r_offset += 4;
10444 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
10445 r[1].r_offset = r[0].r_offset + 4;
10446 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10447 r[1].r_addend = r[0].r_addend;
10448 if (plt_load_toc)
10449 {
10450 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10451 {
10452 r[2].r_offset = r[1].r_offset + 4;
10453 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO);
10454 r[2].r_addend = r[0].r_addend;
10455 }
10456 else
10457 {
10458 r[2].r_offset = r[1].r_offset + 8 + 8 * use_fake_dep;
10459 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10460 r[2].r_addend = r[0].r_addend + 8;
10461 if (plt_static_chain)
10462 {
10463 r[3].r_offset = r[2].r_offset + 4;
10464 r[3].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10465 r[3].r_addend = r[0].r_addend + 16;
10466 }
10467 }
10468 }
10469 }
10470 if (ALWAYS_EMIT_R2SAVE
10471 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10472 bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p), p += 4;
10473 if (plt_load_toc)
10474 {
10475 bfd_put_32 (obfd, ADDIS_R11_R2 | PPC_HA (offset), p), p += 4;
10476 bfd_put_32 (obfd, LD_R12_0R11 | PPC_LO (offset), p), p += 4;
10477 }
10478 else
10479 {
10480 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
10481 bfd_put_32 (obfd, LD_R12_0R12 | PPC_LO (offset), p), p += 4;
10482 }
10483 if (plt_load_toc
10484 && PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10485 {
10486 bfd_put_32 (obfd, ADDI_R11_R11 | PPC_LO (offset), p), p += 4;
10487 offset = 0;
10488 }
10489 bfd_put_32 (obfd, MTCTR_R12, p), p += 4;
10490 if (plt_load_toc)
10491 {
10492 if (use_fake_dep)
10493 {
10494 bfd_put_32 (obfd, XOR_R2_R12_R12, p), p += 4;
10495 bfd_put_32 (obfd, ADD_R11_R11_R2, p), p += 4;
10496 }
10497 bfd_put_32 (obfd, LD_R2_0R11 | PPC_LO (offset + 8), p), p += 4;
10498 if (plt_static_chain)
10499 bfd_put_32 (obfd, LD_R11_0R11 | PPC_LO (offset + 16), p), p += 4;
10500 }
10501 }
10502 else
10503 {
10504 if (r != NULL)
10505 {
10506 if (ALWAYS_EMIT_R2SAVE
10507 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10508 r[0].r_offset += 4;
10509 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10510 if (plt_load_toc)
10511 {
10512 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10513 {
10514 r[1].r_offset = r[0].r_offset + 4;
10515 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16);
10516 r[1].r_addend = r[0].r_addend;
10517 }
10518 else
10519 {
10520 r[1].r_offset = r[0].r_offset + 8 + 8 * use_fake_dep;
10521 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10522 r[1].r_addend = r[0].r_addend + 8 + 8 * plt_static_chain;
10523 if (plt_static_chain)
10524 {
10525 r[2].r_offset = r[1].r_offset + 4;
10526 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10527 r[2].r_addend = r[0].r_addend + 8;
10528 }
10529 }
10530 }
10531 }
10532 if (ALWAYS_EMIT_R2SAVE
10533 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10534 bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p), p += 4;
10535 bfd_put_32 (obfd, LD_R12_0R2 | PPC_LO (offset), p), p += 4;
10536 if (plt_load_toc
10537 && PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10538 {
10539 bfd_put_32 (obfd, ADDI_R2_R2 | PPC_LO (offset), p), p += 4;
10540 offset = 0;
10541 }
10542 bfd_put_32 (obfd, MTCTR_R12, p), p += 4;
10543 if (plt_load_toc)
10544 {
10545 if (use_fake_dep)
10546 {
10547 bfd_put_32 (obfd, XOR_R11_R12_R12, p), p += 4;
10548 bfd_put_32 (obfd, ADD_R2_R2_R11, p), p += 4;
10549 }
10550 if (plt_static_chain)
10551 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset + 16), p), p += 4;
10552 bfd_put_32 (obfd, LD_R2_0R2 | PPC_LO (offset + 8), p), p += 4;
10553 }
10554 }
10555 if (plt_load_toc && plt_thread_safe && !use_fake_dep)
10556 {
10557 bfd_put_32 (obfd, CMPLDI_R2_0, p), p += 4;
10558 bfd_put_32 (obfd, BNECTR_P4, p), p += 4;
10559 bfd_put_32 (obfd, B_DOT | (cmp_branch_off & 0x3fffffc), p), p += 4;
10560 }
10561 else
10562 bfd_put_32 (obfd, BCTR, p), p += 4;
10563 return p;
10564 }
10565
10566 /* Build a special .plt call stub for __tls_get_addr. */
10567
10568 #define LD_R11_0R3 0xe9630000
10569 #define LD_R12_0R3 0xe9830000
10570 #define MR_R0_R3 0x7c601b78
10571 #define CMPDI_R11_0 0x2c2b0000
10572 #define ADD_R3_R12_R13 0x7c6c6a14
10573 #define BEQLR 0x4d820020
10574 #define MR_R3_R0 0x7c030378
10575 #define STD_R11_0R1 0xf9610000
10576 #define BCTRL 0x4e800421
10577 #define LD_R11_0R1 0xe9610000
10578 #define MTLR_R11 0x7d6803a6
10579
10580 static inline bfd_byte *
10581 build_tls_get_addr_stub (struct ppc_link_hash_table *htab,
10582 struct ppc_stub_hash_entry *stub_entry,
10583 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
10584 {
10585 bfd *obfd = htab->params->stub_bfd;
10586
10587 bfd_put_32 (obfd, LD_R11_0R3 + 0, p), p += 4;
10588 bfd_put_32 (obfd, LD_R12_0R3 + 8, p), p += 4;
10589 bfd_put_32 (obfd, MR_R0_R3, p), p += 4;
10590 bfd_put_32 (obfd, CMPDI_R11_0, p), p += 4;
10591 bfd_put_32 (obfd, ADD_R3_R12_R13, p), p += 4;
10592 bfd_put_32 (obfd, BEQLR, p), p += 4;
10593 bfd_put_32 (obfd, MR_R3_R0, p), p += 4;
10594 bfd_put_32 (obfd, MFLR_R11, p), p += 4;
10595 bfd_put_32 (obfd, STD_R11_0R1 + STK_LINKER (htab), p), p += 4;
10596
10597 if (r != NULL)
10598 r[0].r_offset += 9 * 4;
10599 p = build_plt_stub (htab, stub_entry, p, offset, r);
10600 bfd_put_32 (obfd, BCTRL, p - 4);
10601
10602 bfd_put_32 (obfd, LD_R2_0R1 + STK_TOC (htab), p), p += 4;
10603 bfd_put_32 (obfd, LD_R11_0R1 + STK_LINKER (htab), p), p += 4;
10604 bfd_put_32 (obfd, MTLR_R11, p), p += 4;
10605 bfd_put_32 (obfd, BLR, p), p += 4;
10606
10607 return p;
10608 }
10609
10610 static Elf_Internal_Rela *
10611 get_relocs (asection *sec, int count)
10612 {
10613 Elf_Internal_Rela *relocs;
10614 struct bfd_elf_section_data *elfsec_data;
10615
10616 elfsec_data = elf_section_data (sec);
10617 relocs = elfsec_data->relocs;
10618 if (relocs == NULL)
10619 {
10620 bfd_size_type relsize;
10621 relsize = sec->reloc_count * sizeof (*relocs);
10622 relocs = bfd_alloc (sec->owner, relsize);
10623 if (relocs == NULL)
10624 return NULL;
10625 elfsec_data->relocs = relocs;
10626 elfsec_data->rela.hdr = bfd_zalloc (sec->owner,
10627 sizeof (Elf_Internal_Shdr));
10628 if (elfsec_data->rela.hdr == NULL)
10629 return NULL;
10630 elfsec_data->rela.hdr->sh_size = (sec->reloc_count
10631 * sizeof (Elf64_External_Rela));
10632 elfsec_data->rela.hdr->sh_entsize = sizeof (Elf64_External_Rela);
10633 sec->reloc_count = 0;
10634 }
10635 relocs += sec->reloc_count;
10636 sec->reloc_count += count;
10637 return relocs;
10638 }
10639
10640 static bfd_vma
10641 get_r2off (struct bfd_link_info *info,
10642 struct ppc_stub_hash_entry *stub_entry)
10643 {
10644 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10645 bfd_vma r2off = htab->sec_info[stub_entry->target_section->id].toc_off;
10646
10647 if (r2off == 0)
10648 {
10649 /* Support linking -R objects. Get the toc pointer from the
10650 opd entry. */
10651 char buf[8];
10652 if (!htab->opd_abi)
10653 return r2off;
10654 asection *opd = stub_entry->h->elf.root.u.def.section;
10655 bfd_vma opd_off = stub_entry->h->elf.root.u.def.value;
10656
10657 if (strcmp (opd->name, ".opd") != 0
10658 || opd->reloc_count != 0)
10659 {
10660 info->callbacks->einfo (_("%P: cannot find opd entry toc for `%T'\n"),
10661 stub_entry->h->elf.root.root.string);
10662 bfd_set_error (bfd_error_bad_value);
10663 return (bfd_vma) -1;
10664 }
10665 if (!bfd_get_section_contents (opd->owner, opd, buf, opd_off + 8, 8))
10666 return (bfd_vma) -1;
10667 r2off = bfd_get_64 (opd->owner, buf);
10668 r2off -= elf_gp (info->output_bfd);
10669 }
10670 r2off -= htab->sec_info[stub_entry->group->link_sec->id].toc_off;
10671 return r2off;
10672 }
10673
10674 static bfd_boolean
10675 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
10676 {
10677 struct ppc_stub_hash_entry *stub_entry;
10678 struct ppc_branch_hash_entry *br_entry;
10679 struct bfd_link_info *info;
10680 struct ppc_link_hash_table *htab;
10681 bfd_byte *loc;
10682 bfd_byte *p;
10683 bfd_vma dest, off;
10684 int size;
10685 Elf_Internal_Rela *r;
10686 asection *plt;
10687
10688 /* Massage our args to the form they really have. */
10689 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
10690 info = in_arg;
10691
10692 htab = ppc_hash_table (info);
10693 if (htab == NULL)
10694 return FALSE;
10695
10696 /* Make a note of the offset within the stubs for this entry. */
10697 stub_entry->stub_offset = stub_entry->group->stub_sec->size;
10698 loc = stub_entry->group->stub_sec->contents + stub_entry->stub_offset;
10699
10700 htab->stub_count[stub_entry->stub_type - 1] += 1;
10701 switch (stub_entry->stub_type)
10702 {
10703 case ppc_stub_long_branch:
10704 case ppc_stub_long_branch_r2off:
10705 /* Branches are relative. This is where we are going to. */
10706 dest = (stub_entry->target_value
10707 + stub_entry->target_section->output_offset
10708 + stub_entry->target_section->output_section->vma);
10709 dest += PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
10710 off = dest;
10711
10712 /* And this is where we are coming from. */
10713 off -= (stub_entry->stub_offset
10714 + stub_entry->group->stub_sec->output_offset
10715 + stub_entry->group->stub_sec->output_section->vma);
10716
10717 size = 4;
10718 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
10719 {
10720 bfd_vma r2off = get_r2off (info, stub_entry);
10721
10722 if (r2off == (bfd_vma) -1)
10723 {
10724 htab->stub_error = TRUE;
10725 return FALSE;
10726 }
10727 bfd_put_32 (htab->params->stub_bfd, STD_R2_0R1 + STK_TOC (htab), loc);
10728 loc += 4;
10729 size = 8;
10730 if (PPC_HA (r2off) != 0)
10731 {
10732 bfd_put_32 (htab->params->stub_bfd,
10733 ADDIS_R2_R2 | PPC_HA (r2off), loc);
10734 loc += 4;
10735 size += 4;
10736 }
10737 if (PPC_LO (r2off) != 0)
10738 {
10739 bfd_put_32 (htab->params->stub_bfd,
10740 ADDI_R2_R2 | PPC_LO (r2off), loc);
10741 loc += 4;
10742 size += 4;
10743 }
10744 off -= size - 4;
10745 }
10746 bfd_put_32 (htab->params->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
10747
10748 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
10749 {
10750 info->callbacks->einfo
10751 (_("%P: long branch stub `%s' offset overflow\n"),
10752 stub_entry->root.string);
10753 htab->stub_error = TRUE;
10754 return FALSE;
10755 }
10756
10757 if (info->emitrelocations)
10758 {
10759 r = get_relocs (stub_entry->group->stub_sec, 1);
10760 if (r == NULL)
10761 return FALSE;
10762 r->r_offset = loc - stub_entry->group->stub_sec->contents;
10763 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
10764 r->r_addend = dest;
10765 if (stub_entry->h != NULL)
10766 {
10767 struct elf_link_hash_entry **hashes;
10768 unsigned long symndx;
10769 struct ppc_link_hash_entry *h;
10770
10771 hashes = elf_sym_hashes (htab->params->stub_bfd);
10772 if (hashes == NULL)
10773 {
10774 bfd_size_type hsize;
10775
10776 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
10777 hashes = bfd_zalloc (htab->params->stub_bfd, hsize);
10778 if (hashes == NULL)
10779 return FALSE;
10780 elf_sym_hashes (htab->params->stub_bfd) = hashes;
10781 htab->stub_globals = 1;
10782 }
10783 symndx = htab->stub_globals++;
10784 h = stub_entry->h;
10785 hashes[symndx] = &h->elf;
10786 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
10787 if (h->oh != NULL && h->oh->is_func)
10788 h = ppc_follow_link (h->oh);
10789 if (h->elf.root.u.def.section != stub_entry->target_section)
10790 /* H is an opd symbol. The addend must be zero. */
10791 r->r_addend = 0;
10792 else
10793 {
10794 off = (h->elf.root.u.def.value
10795 + h->elf.root.u.def.section->output_offset
10796 + h->elf.root.u.def.section->output_section->vma);
10797 r->r_addend -= off;
10798 }
10799 }
10800 }
10801 break;
10802
10803 case ppc_stub_plt_branch:
10804 case ppc_stub_plt_branch_r2off:
10805 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
10806 stub_entry->root.string + 9,
10807 FALSE, FALSE);
10808 if (br_entry == NULL)
10809 {
10810 info->callbacks->einfo (_("%P: can't find branch stub `%s'\n"),
10811 stub_entry->root.string);
10812 htab->stub_error = TRUE;
10813 return FALSE;
10814 }
10815
10816 dest = (stub_entry->target_value
10817 + stub_entry->target_section->output_offset
10818 + stub_entry->target_section->output_section->vma);
10819 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
10820 dest += PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
10821
10822 bfd_put_64 (htab->brlt->owner, dest,
10823 htab->brlt->contents + br_entry->offset);
10824
10825 if (br_entry->iter == htab->stub_iteration)
10826 {
10827 br_entry->iter = 0;
10828
10829 if (htab->relbrlt != NULL)
10830 {
10831 /* Create a reloc for the branch lookup table entry. */
10832 Elf_Internal_Rela rela;
10833 bfd_byte *rl;
10834
10835 rela.r_offset = (br_entry->offset
10836 + htab->brlt->output_offset
10837 + htab->brlt->output_section->vma);
10838 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
10839 rela.r_addend = dest;
10840
10841 rl = htab->relbrlt->contents;
10842 rl += (htab->relbrlt->reloc_count++
10843 * sizeof (Elf64_External_Rela));
10844 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
10845 }
10846 else if (info->emitrelocations)
10847 {
10848 r = get_relocs (htab->brlt, 1);
10849 if (r == NULL)
10850 return FALSE;
10851 /* brlt, being SEC_LINKER_CREATED does not go through the
10852 normal reloc processing. Symbols and offsets are not
10853 translated from input file to output file form, so
10854 set up the offset per the output file. */
10855 r->r_offset = (br_entry->offset
10856 + htab->brlt->output_offset
10857 + htab->brlt->output_section->vma);
10858 r->r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
10859 r->r_addend = dest;
10860 }
10861 }
10862
10863 dest = (br_entry->offset
10864 + htab->brlt->output_offset
10865 + htab->brlt->output_section->vma);
10866
10867 off = (dest
10868 - elf_gp (htab->brlt->output_section->owner)
10869 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
10870
10871 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
10872 {
10873 info->callbacks->einfo
10874 (_("%P: linkage table error against `%T'\n"),
10875 stub_entry->root.string);
10876 bfd_set_error (bfd_error_bad_value);
10877 htab->stub_error = TRUE;
10878 return FALSE;
10879 }
10880
10881 if (info->emitrelocations)
10882 {
10883 r = get_relocs (stub_entry->group->stub_sec, 1 + (PPC_HA (off) != 0));
10884 if (r == NULL)
10885 return FALSE;
10886 r[0].r_offset = loc - stub_entry->group->stub_sec->contents;
10887 if (bfd_big_endian (info->output_bfd))
10888 r[0].r_offset += 2;
10889 if (stub_entry->stub_type == ppc_stub_plt_branch_r2off)
10890 r[0].r_offset += 4;
10891 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10892 r[0].r_addend = dest;
10893 if (PPC_HA (off) != 0)
10894 {
10895 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
10896 r[1].r_offset = r[0].r_offset + 4;
10897 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10898 r[1].r_addend = r[0].r_addend;
10899 }
10900 }
10901
10902 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
10903 {
10904 if (PPC_HA (off) != 0)
10905 {
10906 size = 16;
10907 bfd_put_32 (htab->params->stub_bfd,
10908 ADDIS_R12_R2 | PPC_HA (off), loc);
10909 loc += 4;
10910 bfd_put_32 (htab->params->stub_bfd,
10911 LD_R12_0R12 | PPC_LO (off), loc);
10912 }
10913 else
10914 {
10915 size = 12;
10916 bfd_put_32 (htab->params->stub_bfd,
10917 LD_R12_0R2 | PPC_LO (off), loc);
10918 }
10919 }
10920 else
10921 {
10922 bfd_vma r2off = get_r2off (info, stub_entry);
10923
10924 if (r2off == (bfd_vma) -1)
10925 {
10926 htab->stub_error = TRUE;
10927 return FALSE;
10928 }
10929
10930 bfd_put_32 (htab->params->stub_bfd, STD_R2_0R1 + STK_TOC (htab), loc);
10931 loc += 4;
10932 size = 16;
10933 if (PPC_HA (off) != 0)
10934 {
10935 size += 4;
10936 bfd_put_32 (htab->params->stub_bfd,
10937 ADDIS_R12_R2 | PPC_HA (off), loc);
10938 loc += 4;
10939 bfd_put_32 (htab->params->stub_bfd,
10940 LD_R12_0R12 | PPC_LO (off), loc);
10941 }
10942 else
10943 bfd_put_32 (htab->params->stub_bfd, LD_R12_0R2 | PPC_LO (off), loc);
10944
10945 if (PPC_HA (r2off) != 0)
10946 {
10947 size += 4;
10948 loc += 4;
10949 bfd_put_32 (htab->params->stub_bfd,
10950 ADDIS_R2_R2 | PPC_HA (r2off), loc);
10951 }
10952 if (PPC_LO (r2off) != 0)
10953 {
10954 size += 4;
10955 loc += 4;
10956 bfd_put_32 (htab->params->stub_bfd,
10957 ADDI_R2_R2 | PPC_LO (r2off), loc);
10958 }
10959 }
10960 loc += 4;
10961 bfd_put_32 (htab->params->stub_bfd, MTCTR_R12, loc);
10962 loc += 4;
10963 bfd_put_32 (htab->params->stub_bfd, BCTR, loc);
10964 break;
10965
10966 case ppc_stub_plt_call:
10967 case ppc_stub_plt_call_r2save:
10968 if (stub_entry->h != NULL
10969 && stub_entry->h->is_func_descriptor
10970 && stub_entry->h->oh != NULL)
10971 {
10972 struct ppc_link_hash_entry *fh = ppc_follow_link (stub_entry->h->oh);
10973
10974 /* If the old-ABI "dot-symbol" is undefined make it weak so
10975 we don't get a link error from RELOC_FOR_GLOBAL_SYMBOL. */
10976 if (fh->elf.root.type == bfd_link_hash_undefined)
10977 fh->elf.root.type = bfd_link_hash_undefweak;
10978 /* Stop undo_symbol_twiddle changing it back to undefined. */
10979 fh->was_undefined = 0;
10980 }
10981
10982 /* Now build the stub. */
10983 dest = stub_entry->plt_ent->plt.offset & ~1;
10984 if (dest >= (bfd_vma) -2)
10985 abort ();
10986
10987 plt = htab->elf.splt;
10988 if (!htab->elf.dynamic_sections_created
10989 || stub_entry->h == NULL
10990 || stub_entry->h->elf.dynindx == -1)
10991 plt = htab->elf.iplt;
10992
10993 dest += plt->output_offset + plt->output_section->vma;
10994
10995 if (stub_entry->h == NULL
10996 && (stub_entry->plt_ent->plt.offset & 1) == 0)
10997 {
10998 Elf_Internal_Rela rela;
10999 bfd_byte *rl;
11000
11001 rela.r_offset = dest;
11002 if (htab->opd_abi)
11003 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
11004 else
11005 rela.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
11006 rela.r_addend = (stub_entry->target_value
11007 + stub_entry->target_section->output_offset
11008 + stub_entry->target_section->output_section->vma);
11009
11010 rl = (htab->elf.irelplt->contents
11011 + (htab->elf.irelplt->reloc_count++
11012 * sizeof (Elf64_External_Rela)));
11013 bfd_elf64_swap_reloca_out (info->output_bfd, &rela, rl);
11014 stub_entry->plt_ent->plt.offset |= 1;
11015 }
11016
11017 off = (dest
11018 - elf_gp (plt->output_section->owner)
11019 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11020
11021 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
11022 {
11023 info->callbacks->einfo
11024 (_("%P: linkage table error against `%T'\n"),
11025 stub_entry->h != NULL
11026 ? stub_entry->h->elf.root.root.string
11027 : "<local sym>");
11028 bfd_set_error (bfd_error_bad_value);
11029 htab->stub_error = TRUE;
11030 return FALSE;
11031 }
11032
11033 if (htab->params->plt_stub_align != 0)
11034 {
11035 unsigned pad = plt_stub_pad (htab, stub_entry, off);
11036
11037 stub_entry->group->stub_sec->size += pad;
11038 stub_entry->stub_offset = stub_entry->group->stub_sec->size;
11039 loc += pad;
11040 }
11041
11042 r = NULL;
11043 if (info->emitrelocations)
11044 {
11045 r = get_relocs (stub_entry->group->stub_sec,
11046 ((PPC_HA (off) != 0)
11047 + (htab->opd_abi
11048 ? 2 + (htab->params->plt_static_chain
11049 && PPC_HA (off + 16) == PPC_HA (off))
11050 : 1)));
11051 if (r == NULL)
11052 return FALSE;
11053 r[0].r_offset = loc - stub_entry->group->stub_sec->contents;
11054 if (bfd_big_endian (info->output_bfd))
11055 r[0].r_offset += 2;
11056 r[0].r_addend = dest;
11057 }
11058 if (stub_entry->h != NULL
11059 && (stub_entry->h == htab->tls_get_addr_fd
11060 || stub_entry->h == htab->tls_get_addr)
11061 && htab->params->tls_get_addr_opt)
11062 p = build_tls_get_addr_stub (htab, stub_entry, loc, off, r);
11063 else
11064 p = build_plt_stub (htab, stub_entry, loc, off, r);
11065 size = p - loc;
11066 break;
11067
11068 case ppc_stub_save_res:
11069 return TRUE;
11070
11071 default:
11072 BFD_FAIL ();
11073 return FALSE;
11074 }
11075
11076 stub_entry->group->stub_sec->size += size;
11077
11078 if (htab->params->emit_stub_syms)
11079 {
11080 struct elf_link_hash_entry *h;
11081 size_t len1, len2;
11082 char *name;
11083 const char *const stub_str[] = { "long_branch",
11084 "long_branch_r2off",
11085 "plt_branch",
11086 "plt_branch_r2off",
11087 "plt_call",
11088 "plt_call" };
11089
11090 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
11091 len2 = strlen (stub_entry->root.string);
11092 name = bfd_malloc (len1 + len2 + 2);
11093 if (name == NULL)
11094 return FALSE;
11095 memcpy (name, stub_entry->root.string, 9);
11096 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
11097 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
11098 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
11099 if (h == NULL)
11100 return FALSE;
11101 if (h->root.type == bfd_link_hash_new)
11102 {
11103 h->root.type = bfd_link_hash_defined;
11104 h->root.u.def.section = stub_entry->group->stub_sec;
11105 h->root.u.def.value = stub_entry->stub_offset;
11106 h->ref_regular = 1;
11107 h->def_regular = 1;
11108 h->ref_regular_nonweak = 1;
11109 h->forced_local = 1;
11110 h->non_elf = 0;
11111 h->root.linker_def = 1;
11112 }
11113 }
11114
11115 return TRUE;
11116 }
11117
11118 /* As above, but don't actually build the stub. Just bump offset so
11119 we know stub section sizes, and select plt_branch stubs where
11120 long_branch stubs won't do. */
11121
11122 static bfd_boolean
11123 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
11124 {
11125 struct ppc_stub_hash_entry *stub_entry;
11126 struct bfd_link_info *info;
11127 struct ppc_link_hash_table *htab;
11128 bfd_vma off;
11129 int size;
11130
11131 /* Massage our args to the form they really have. */
11132 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
11133 info = in_arg;
11134
11135 htab = ppc_hash_table (info);
11136 if (htab == NULL)
11137 return FALSE;
11138
11139 if (stub_entry->h != NULL
11140 && stub_entry->h->save_res
11141 && stub_entry->h->elf.root.type == bfd_link_hash_defined
11142 && stub_entry->h->elf.root.u.def.section == htab->sfpr)
11143 {
11144 /* Don't make stubs to out-of-line register save/restore
11145 functions. Instead, emit copies of the functions. */
11146 stub_entry->group->needs_save_res = 1;
11147 stub_entry->stub_type = ppc_stub_save_res;
11148 return TRUE;
11149 }
11150
11151 if (stub_entry->stub_type == ppc_stub_plt_call
11152 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
11153 {
11154 asection *plt;
11155 off = stub_entry->plt_ent->plt.offset & ~(bfd_vma) 1;
11156 if (off >= (bfd_vma) -2)
11157 abort ();
11158 plt = htab->elf.splt;
11159 if (!htab->elf.dynamic_sections_created
11160 || stub_entry->h == NULL
11161 || stub_entry->h->elf.dynindx == -1)
11162 plt = htab->elf.iplt;
11163 off += (plt->output_offset
11164 + plt->output_section->vma
11165 - elf_gp (plt->output_section->owner)
11166 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11167
11168 size = plt_stub_size (htab, stub_entry, off);
11169 if (htab->params->plt_stub_align)
11170 size += plt_stub_pad (htab, stub_entry, off);
11171 if (info->emitrelocations)
11172 {
11173 stub_entry->group->stub_sec->reloc_count
11174 += ((PPC_HA (off) != 0)
11175 + (htab->opd_abi
11176 ? 2 + (htab->params->plt_static_chain
11177 && PPC_HA (off + 16) == PPC_HA (off))
11178 : 1));
11179 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11180 }
11181 }
11182 else
11183 {
11184 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
11185 variants. */
11186 bfd_vma r2off = 0;
11187 bfd_vma local_off = 0;
11188
11189 off = (stub_entry->target_value
11190 + stub_entry->target_section->output_offset
11191 + stub_entry->target_section->output_section->vma);
11192 off -= (stub_entry->group->stub_sec->size
11193 + stub_entry->group->stub_sec->output_offset
11194 + stub_entry->group->stub_sec->output_section->vma);
11195
11196 /* Reset the stub type from the plt variant in case we now
11197 can reach with a shorter stub. */
11198 if (stub_entry->stub_type >= ppc_stub_plt_branch)
11199 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
11200
11201 size = 4;
11202 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
11203 {
11204 r2off = get_r2off (info, stub_entry);
11205 if (r2off == (bfd_vma) -1)
11206 {
11207 htab->stub_error = TRUE;
11208 return FALSE;
11209 }
11210 size = 8;
11211 if (PPC_HA (r2off) != 0)
11212 size += 4;
11213 if (PPC_LO (r2off) != 0)
11214 size += 4;
11215 off -= size - 4;
11216 }
11217
11218 local_off = PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
11219
11220 /* If the branch offset if too big, use a ppc_stub_plt_branch.
11221 Do the same for -R objects without function descriptors. */
11222 if (off + (1 << 25) >= (bfd_vma) (1 << 26) - local_off
11223 || (stub_entry->stub_type == ppc_stub_long_branch_r2off
11224 && r2off == 0
11225 && htab->sec_info[stub_entry->target_section->id].toc_off == 0))
11226 {
11227 struct ppc_branch_hash_entry *br_entry;
11228
11229 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
11230 stub_entry->root.string + 9,
11231 TRUE, FALSE);
11232 if (br_entry == NULL)
11233 {
11234 info->callbacks->einfo (_("%P: can't build branch stub `%s'\n"),
11235 stub_entry->root.string);
11236 htab->stub_error = TRUE;
11237 return FALSE;
11238 }
11239
11240 if (br_entry->iter != htab->stub_iteration)
11241 {
11242 br_entry->iter = htab->stub_iteration;
11243 br_entry->offset = htab->brlt->size;
11244 htab->brlt->size += 8;
11245
11246 if (htab->relbrlt != NULL)
11247 htab->relbrlt->size += sizeof (Elf64_External_Rela);
11248 else if (info->emitrelocations)
11249 {
11250 htab->brlt->reloc_count += 1;
11251 htab->brlt->flags |= SEC_RELOC;
11252 }
11253 }
11254
11255 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
11256 off = (br_entry->offset
11257 + htab->brlt->output_offset
11258 + htab->brlt->output_section->vma
11259 - elf_gp (htab->brlt->output_section->owner)
11260 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11261
11262 if (info->emitrelocations)
11263 {
11264 stub_entry->group->stub_sec->reloc_count
11265 += 1 + (PPC_HA (off) != 0);
11266 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11267 }
11268
11269 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
11270 {
11271 size = 12;
11272 if (PPC_HA (off) != 0)
11273 size = 16;
11274 }
11275 else
11276 {
11277 size = 16;
11278 if (PPC_HA (off) != 0)
11279 size += 4;
11280
11281 if (PPC_HA (r2off) != 0)
11282 size += 4;
11283 if (PPC_LO (r2off) != 0)
11284 size += 4;
11285 }
11286 }
11287 else if (info->emitrelocations)
11288 {
11289 stub_entry->group->stub_sec->reloc_count += 1;
11290 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11291 }
11292 }
11293
11294 stub_entry->group->stub_sec->size += size;
11295 return TRUE;
11296 }
11297
11298 /* Set up various things so that we can make a list of input sections
11299 for each output section included in the link. Returns -1 on error,
11300 0 when no stubs will be needed, and 1 on success. */
11301
11302 int
11303 ppc64_elf_setup_section_lists (struct bfd_link_info *info)
11304 {
11305 unsigned int id;
11306 bfd_size_type amt;
11307 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11308
11309 if (htab == NULL)
11310 return -1;
11311
11312 htab->sec_info_arr_size = bfd_get_next_section_id ();
11313 amt = sizeof (*htab->sec_info) * (htab->sec_info_arr_size);
11314 htab->sec_info = bfd_zmalloc (amt);
11315 if (htab->sec_info == NULL)
11316 return -1;
11317
11318 /* Set toc_off for com, und, abs and ind sections. */
11319 for (id = 0; id < 3; id++)
11320 htab->sec_info[id].toc_off = TOC_BASE_OFF;
11321
11322 return 1;
11323 }
11324
11325 /* Set up for first pass at multitoc partitioning. */
11326
11327 void
11328 ppc64_elf_start_multitoc_partition (struct bfd_link_info *info)
11329 {
11330 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11331
11332 htab->toc_curr = ppc64_elf_set_toc (info, info->output_bfd);
11333 htab->toc_bfd = NULL;
11334 htab->toc_first_sec = NULL;
11335 }
11336
11337 /* The linker repeatedly calls this function for each TOC input section
11338 and linker generated GOT section. Group input bfds such that the toc
11339 within a group is less than 64k in size. */
11340
11341 bfd_boolean
11342 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
11343 {
11344 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11345 bfd_vma addr, off, limit;
11346
11347 if (htab == NULL)
11348 return FALSE;
11349
11350 if (!htab->second_toc_pass)
11351 {
11352 /* Keep track of the first .toc or .got section for this input bfd. */
11353 bfd_boolean new_bfd = htab->toc_bfd != isec->owner;
11354
11355 if (new_bfd)
11356 {
11357 htab->toc_bfd = isec->owner;
11358 htab->toc_first_sec = isec;
11359 }
11360
11361 addr = isec->output_offset + isec->output_section->vma;
11362 off = addr - htab->toc_curr;
11363 limit = 0x80008000;
11364 if (ppc64_elf_tdata (isec->owner)->has_small_toc_reloc)
11365 limit = 0x10000;
11366 if (off + isec->size > limit)
11367 {
11368 addr = (htab->toc_first_sec->output_offset
11369 + htab->toc_first_sec->output_section->vma);
11370 htab->toc_curr = addr;
11371 htab->toc_curr &= -TOC_BASE_ALIGN;
11372 }
11373
11374 /* toc_curr is the base address of this toc group. Set elf_gp
11375 for the input section to be the offset relative to the
11376 output toc base plus 0x8000. Making the input elf_gp an
11377 offset allows us to move the toc as a whole without
11378 recalculating input elf_gp. */
11379 off = htab->toc_curr - elf_gp (isec->output_section->owner);
11380 off += TOC_BASE_OFF;
11381
11382 /* Die if someone uses a linker script that doesn't keep input
11383 file .toc and .got together. */
11384 if (new_bfd
11385 && elf_gp (isec->owner) != 0
11386 && elf_gp (isec->owner) != off)
11387 return FALSE;
11388
11389 elf_gp (isec->owner) = off;
11390 return TRUE;
11391 }
11392
11393 /* During the second pass toc_first_sec points to the start of
11394 a toc group, and toc_curr is used to track the old elf_gp.
11395 We use toc_bfd to ensure we only look at each bfd once. */
11396 if (htab->toc_bfd == isec->owner)
11397 return TRUE;
11398 htab->toc_bfd = isec->owner;
11399
11400 if (htab->toc_first_sec == NULL
11401 || htab->toc_curr != elf_gp (isec->owner))
11402 {
11403 htab->toc_curr = elf_gp (isec->owner);
11404 htab->toc_first_sec = isec;
11405 }
11406 addr = (htab->toc_first_sec->output_offset
11407 + htab->toc_first_sec->output_section->vma);
11408 off = addr - elf_gp (isec->output_section->owner) + TOC_BASE_OFF;
11409 elf_gp (isec->owner) = off;
11410
11411 return TRUE;
11412 }
11413
11414 /* Called via elf_link_hash_traverse to merge GOT entries for global
11415 symbol H. */
11416
11417 static bfd_boolean
11418 merge_global_got (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
11419 {
11420 if (h->root.type == bfd_link_hash_indirect)
11421 return TRUE;
11422
11423 merge_got_entries (&h->got.glist);
11424
11425 return TRUE;
11426 }
11427
11428 /* Called via elf_link_hash_traverse to allocate GOT entries for global
11429 symbol H. */
11430
11431 static bfd_boolean
11432 reallocate_got (struct elf_link_hash_entry *h, void *inf)
11433 {
11434 struct got_entry *gent;
11435
11436 if (h->root.type == bfd_link_hash_indirect)
11437 return TRUE;
11438
11439 for (gent = h->got.glist; gent != NULL; gent = gent->next)
11440 if (!gent->is_indirect)
11441 allocate_got (h, (struct bfd_link_info *) inf, gent);
11442 return TRUE;
11443 }
11444
11445 /* Called on the first multitoc pass after the last call to
11446 ppc64_elf_next_toc_section. This function removes duplicate GOT
11447 entries. */
11448
11449 bfd_boolean
11450 ppc64_elf_layout_multitoc (struct bfd_link_info *info)
11451 {
11452 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11453 struct bfd *ibfd, *ibfd2;
11454 bfd_boolean done_something;
11455
11456 htab->multi_toc_needed = htab->toc_curr != elf_gp (info->output_bfd);
11457
11458 if (!htab->do_multi_toc)
11459 return FALSE;
11460
11461 /* Merge global sym got entries within a toc group. */
11462 elf_link_hash_traverse (&htab->elf, merge_global_got, info);
11463
11464 /* And tlsld_got. */
11465 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11466 {
11467 struct got_entry *ent, *ent2;
11468
11469 if (!is_ppc64_elf (ibfd))
11470 continue;
11471
11472 ent = ppc64_tlsld_got (ibfd);
11473 if (!ent->is_indirect
11474 && ent->got.offset != (bfd_vma) -1)
11475 {
11476 for (ibfd2 = ibfd->link.next; ibfd2 != NULL; ibfd2 = ibfd2->link.next)
11477 {
11478 if (!is_ppc64_elf (ibfd2))
11479 continue;
11480
11481 ent2 = ppc64_tlsld_got (ibfd2);
11482 if (!ent2->is_indirect
11483 && ent2->got.offset != (bfd_vma) -1
11484 && elf_gp (ibfd2) == elf_gp (ibfd))
11485 {
11486 ent2->is_indirect = TRUE;
11487 ent2->got.ent = ent;
11488 }
11489 }
11490 }
11491 }
11492
11493 /* Zap sizes of got sections. */
11494 htab->elf.irelplt->rawsize = htab->elf.irelplt->size;
11495 htab->elf.irelplt->size -= htab->got_reli_size;
11496 htab->got_reli_size = 0;
11497
11498 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11499 {
11500 asection *got, *relgot;
11501
11502 if (!is_ppc64_elf (ibfd))
11503 continue;
11504
11505 got = ppc64_elf_tdata (ibfd)->got;
11506 if (got != NULL)
11507 {
11508 got->rawsize = got->size;
11509 got->size = 0;
11510 relgot = ppc64_elf_tdata (ibfd)->relgot;
11511 relgot->rawsize = relgot->size;
11512 relgot->size = 0;
11513 }
11514 }
11515
11516 /* Now reallocate the got, local syms first. We don't need to
11517 allocate section contents again since we never increase size. */
11518 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11519 {
11520 struct got_entry **lgot_ents;
11521 struct got_entry **end_lgot_ents;
11522 struct plt_entry **local_plt;
11523 struct plt_entry **end_local_plt;
11524 unsigned char *lgot_masks;
11525 bfd_size_type locsymcount;
11526 Elf_Internal_Shdr *symtab_hdr;
11527 asection *s;
11528
11529 if (!is_ppc64_elf (ibfd))
11530 continue;
11531
11532 lgot_ents = elf_local_got_ents (ibfd);
11533 if (!lgot_ents)
11534 continue;
11535
11536 symtab_hdr = &elf_symtab_hdr (ibfd);
11537 locsymcount = symtab_hdr->sh_info;
11538 end_lgot_ents = lgot_ents + locsymcount;
11539 local_plt = (struct plt_entry **) end_lgot_ents;
11540 end_local_plt = local_plt + locsymcount;
11541 lgot_masks = (unsigned char *) end_local_plt;
11542 s = ppc64_elf_tdata (ibfd)->got;
11543 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
11544 {
11545 struct got_entry *ent;
11546
11547 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
11548 {
11549 unsigned int ent_size = 8;
11550 unsigned int rel_size = sizeof (Elf64_External_Rela);
11551
11552 ent->got.offset = s->size;
11553 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
11554 {
11555 ent_size *= 2;
11556 rel_size *= 2;
11557 }
11558 s->size += ent_size;
11559 if ((*lgot_masks & PLT_IFUNC) != 0)
11560 {
11561 htab->elf.irelplt->size += rel_size;
11562 htab->got_reli_size += rel_size;
11563 }
11564 else if (bfd_link_pic (info))
11565 {
11566 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
11567 srel->size += rel_size;
11568 }
11569 }
11570 }
11571 }
11572
11573 elf_link_hash_traverse (&htab->elf, reallocate_got, info);
11574
11575 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11576 {
11577 struct got_entry *ent;
11578
11579 if (!is_ppc64_elf (ibfd))
11580 continue;
11581
11582 ent = ppc64_tlsld_got (ibfd);
11583 if (!ent->is_indirect
11584 && ent->got.offset != (bfd_vma) -1)
11585 {
11586 asection *s = ppc64_elf_tdata (ibfd)->got;
11587 ent->got.offset = s->size;
11588 s->size += 16;
11589 if (bfd_link_pic (info))
11590 {
11591 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
11592 srel->size += sizeof (Elf64_External_Rela);
11593 }
11594 }
11595 }
11596
11597 done_something = htab->elf.irelplt->rawsize != htab->elf.irelplt->size;
11598 if (!done_something)
11599 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11600 {
11601 asection *got;
11602
11603 if (!is_ppc64_elf (ibfd))
11604 continue;
11605
11606 got = ppc64_elf_tdata (ibfd)->got;
11607 if (got != NULL)
11608 {
11609 done_something = got->rawsize != got->size;
11610 if (done_something)
11611 break;
11612 }
11613 }
11614
11615 if (done_something)
11616 (*htab->params->layout_sections_again) ();
11617
11618 /* Set up for second pass over toc sections to recalculate elf_gp
11619 on input sections. */
11620 htab->toc_bfd = NULL;
11621 htab->toc_first_sec = NULL;
11622 htab->second_toc_pass = TRUE;
11623 return done_something;
11624 }
11625
11626 /* Called after second pass of multitoc partitioning. */
11627
11628 void
11629 ppc64_elf_finish_multitoc_partition (struct bfd_link_info *info)
11630 {
11631 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11632
11633 /* After the second pass, toc_curr tracks the TOC offset used
11634 for code sections below in ppc64_elf_next_input_section. */
11635 htab->toc_curr = TOC_BASE_OFF;
11636 }
11637
11638 /* No toc references were found in ISEC. If the code in ISEC makes no
11639 calls, then there's no need to use toc adjusting stubs when branching
11640 into ISEC. Actually, indirect calls from ISEC are OK as they will
11641 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
11642 needed, and 2 if a cyclical call-graph was found but no other reason
11643 for a stub was detected. If called from the top level, a return of
11644 2 means the same as a return of 0. */
11645
11646 static int
11647 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
11648 {
11649 int ret;
11650
11651 /* Mark this section as checked. */
11652 isec->call_check_done = 1;
11653
11654 /* We know none of our code bearing sections will need toc stubs. */
11655 if ((isec->flags & SEC_LINKER_CREATED) != 0)
11656 return 0;
11657
11658 if (isec->size == 0)
11659 return 0;
11660
11661 if (isec->output_section == NULL)
11662 return 0;
11663
11664 ret = 0;
11665 if (isec->reloc_count != 0)
11666 {
11667 Elf_Internal_Rela *relstart, *rel;
11668 Elf_Internal_Sym *local_syms;
11669 struct ppc_link_hash_table *htab;
11670
11671 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
11672 info->keep_memory);
11673 if (relstart == NULL)
11674 return -1;
11675
11676 /* Look for branches to outside of this section. */
11677 local_syms = NULL;
11678 htab = ppc_hash_table (info);
11679 if (htab == NULL)
11680 return -1;
11681
11682 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
11683 {
11684 enum elf_ppc64_reloc_type r_type;
11685 unsigned long r_symndx;
11686 struct elf_link_hash_entry *h;
11687 struct ppc_link_hash_entry *eh;
11688 Elf_Internal_Sym *sym;
11689 asection *sym_sec;
11690 struct _opd_sec_data *opd;
11691 bfd_vma sym_value;
11692 bfd_vma dest;
11693
11694 r_type = ELF64_R_TYPE (rel->r_info);
11695 if (r_type != R_PPC64_REL24
11696 && r_type != R_PPC64_REL14
11697 && r_type != R_PPC64_REL14_BRTAKEN
11698 && r_type != R_PPC64_REL14_BRNTAKEN)
11699 continue;
11700
11701 r_symndx = ELF64_R_SYM (rel->r_info);
11702 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
11703 isec->owner))
11704 {
11705 ret = -1;
11706 break;
11707 }
11708
11709 /* Calls to dynamic lib functions go through a plt call stub
11710 that uses r2. */
11711 eh = (struct ppc_link_hash_entry *) h;
11712 if (eh != NULL
11713 && (eh->elf.plt.plist != NULL
11714 || (eh->oh != NULL
11715 && ppc_follow_link (eh->oh)->elf.plt.plist != NULL)))
11716 {
11717 ret = 1;
11718 break;
11719 }
11720
11721 if (sym_sec == NULL)
11722 /* Ignore other undefined symbols. */
11723 continue;
11724
11725 /* Assume branches to other sections not included in the
11726 link need stubs too, to cover -R and absolute syms. */
11727 if (sym_sec->output_section == NULL)
11728 {
11729 ret = 1;
11730 break;
11731 }
11732
11733 if (h == NULL)
11734 sym_value = sym->st_value;
11735 else
11736 {
11737 if (h->root.type != bfd_link_hash_defined
11738 && h->root.type != bfd_link_hash_defweak)
11739 abort ();
11740 sym_value = h->root.u.def.value;
11741 }
11742 sym_value += rel->r_addend;
11743
11744 /* If this branch reloc uses an opd sym, find the code section. */
11745 opd = get_opd_info (sym_sec);
11746 if (opd != NULL)
11747 {
11748 if (h == NULL && opd->adjust != NULL)
11749 {
11750 long adjust;
11751
11752 adjust = opd->adjust[OPD_NDX (sym_value)];
11753 if (adjust == -1)
11754 /* Assume deleted functions won't ever be called. */
11755 continue;
11756 sym_value += adjust;
11757 }
11758
11759 dest = opd_entry_value (sym_sec, sym_value,
11760 &sym_sec, NULL, FALSE);
11761 if (dest == (bfd_vma) -1)
11762 continue;
11763 }
11764 else
11765 dest = (sym_value
11766 + sym_sec->output_offset
11767 + sym_sec->output_section->vma);
11768
11769 /* Ignore branch to self. */
11770 if (sym_sec == isec)
11771 continue;
11772
11773 /* If the called function uses the toc, we need a stub. */
11774 if (sym_sec->has_toc_reloc
11775 || sym_sec->makes_toc_func_call)
11776 {
11777 ret = 1;
11778 break;
11779 }
11780
11781 /* Assume any branch that needs a long branch stub might in fact
11782 need a plt_branch stub. A plt_branch stub uses r2. */
11783 else if (dest - (isec->output_offset
11784 + isec->output_section->vma
11785 + rel->r_offset) + (1 << 25)
11786 >= (2u << 25) - PPC64_LOCAL_ENTRY_OFFSET (h
11787 ? h->other
11788 : sym->st_other))
11789 {
11790 ret = 1;
11791 break;
11792 }
11793
11794 /* If calling back to a section in the process of being
11795 tested, we can't say for sure that no toc adjusting stubs
11796 are needed, so don't return zero. */
11797 else if (sym_sec->call_check_in_progress)
11798 ret = 2;
11799
11800 /* Branches to another section that itself doesn't have any TOC
11801 references are OK. Recursively call ourselves to check. */
11802 else if (!sym_sec->call_check_done)
11803 {
11804 int recur;
11805
11806 /* Mark current section as indeterminate, so that other
11807 sections that call back to current won't be marked as
11808 known. */
11809 isec->call_check_in_progress = 1;
11810 recur = toc_adjusting_stub_needed (info, sym_sec);
11811 isec->call_check_in_progress = 0;
11812
11813 if (recur != 0)
11814 {
11815 ret = recur;
11816 if (recur != 2)
11817 break;
11818 }
11819 }
11820 }
11821
11822 if (local_syms != NULL
11823 && (elf_symtab_hdr (isec->owner).contents
11824 != (unsigned char *) local_syms))
11825 free (local_syms);
11826 if (elf_section_data (isec)->relocs != relstart)
11827 free (relstart);
11828 }
11829
11830 if ((ret & 1) == 0
11831 && isec->map_head.s != NULL
11832 && (strcmp (isec->output_section->name, ".init") == 0
11833 || strcmp (isec->output_section->name, ".fini") == 0))
11834 {
11835 if (isec->map_head.s->has_toc_reloc
11836 || isec->map_head.s->makes_toc_func_call)
11837 ret = 1;
11838 else if (!isec->map_head.s->call_check_done)
11839 {
11840 int recur;
11841 isec->call_check_in_progress = 1;
11842 recur = toc_adjusting_stub_needed (info, isec->map_head.s);
11843 isec->call_check_in_progress = 0;
11844 if (recur != 0)
11845 ret = recur;
11846 }
11847 }
11848
11849 if (ret == 1)
11850 isec->makes_toc_func_call = 1;
11851
11852 return ret;
11853 }
11854
11855 /* The linker repeatedly calls this function for each input section,
11856 in the order that input sections are linked into output sections.
11857 Build lists of input sections to determine groupings between which
11858 we may insert linker stubs. */
11859
11860 bfd_boolean
11861 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
11862 {
11863 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11864
11865 if (htab == NULL)
11866 return FALSE;
11867
11868 if ((isec->output_section->flags & SEC_CODE) != 0
11869 && isec->output_section->id < htab->sec_info_arr_size)
11870 {
11871 /* This happens to make the list in reverse order,
11872 which is what we want. */
11873 htab->sec_info[isec->id].u.list
11874 = htab->sec_info[isec->output_section->id].u.list;
11875 htab->sec_info[isec->output_section->id].u.list = isec;
11876 }
11877
11878 if (htab->multi_toc_needed)
11879 {
11880 /* Analyse sections that aren't already flagged as needing a
11881 valid toc pointer. Exclude .fixup for the linux kernel.
11882 .fixup contains branches, but only back to the function that
11883 hit an exception. */
11884 if (!(isec->has_toc_reloc
11885 || (isec->flags & SEC_CODE) == 0
11886 || strcmp (isec->name, ".fixup") == 0
11887 || isec->call_check_done))
11888 {
11889 if (toc_adjusting_stub_needed (info, isec) < 0)
11890 return FALSE;
11891 }
11892 /* Make all sections use the TOC assigned for this object file.
11893 This will be wrong for pasted sections; We fix that in
11894 check_pasted_section(). */
11895 if (elf_gp (isec->owner) != 0)
11896 htab->toc_curr = elf_gp (isec->owner);
11897 }
11898
11899 htab->sec_info[isec->id].toc_off = htab->toc_curr;
11900 return TRUE;
11901 }
11902
11903 /* Check that all .init and .fini sections use the same toc, if they
11904 have toc relocs. */
11905
11906 static bfd_boolean
11907 check_pasted_section (struct bfd_link_info *info, const char *name)
11908 {
11909 asection *o = bfd_get_section_by_name (info->output_bfd, name);
11910
11911 if (o != NULL)
11912 {
11913 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11914 bfd_vma toc_off = 0;
11915 asection *i;
11916
11917 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
11918 if (i->has_toc_reloc)
11919 {
11920 if (toc_off == 0)
11921 toc_off = htab->sec_info[i->id].toc_off;
11922 else if (toc_off != htab->sec_info[i->id].toc_off)
11923 return FALSE;
11924 }
11925
11926 if (toc_off == 0)
11927 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
11928 if (i->makes_toc_func_call)
11929 {
11930 toc_off = htab->sec_info[i->id].toc_off;
11931 break;
11932 }
11933
11934 /* Make sure the whole pasted function uses the same toc offset. */
11935 if (toc_off != 0)
11936 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
11937 htab->sec_info[i->id].toc_off = toc_off;
11938 }
11939 return TRUE;
11940 }
11941
11942 bfd_boolean
11943 ppc64_elf_check_init_fini (struct bfd_link_info *info)
11944 {
11945 return (check_pasted_section (info, ".init")
11946 & check_pasted_section (info, ".fini"));
11947 }
11948
11949 /* See whether we can group stub sections together. Grouping stub
11950 sections may result in fewer stubs. More importantly, we need to
11951 put all .init* and .fini* stubs at the beginning of the .init or
11952 .fini output sections respectively, because glibc splits the
11953 _init and _fini functions into multiple parts. Putting a stub in
11954 the middle of a function is not a good idea. */
11955
11956 static bfd_boolean
11957 group_sections (struct bfd_link_info *info,
11958 bfd_size_type stub_group_size,
11959 bfd_boolean stubs_always_before_branch)
11960 {
11961 struct ppc_link_hash_table *htab;
11962 asection *osec;
11963 bfd_size_type stub14_group_size;
11964 bfd_boolean suppress_size_errors;
11965
11966 htab = ppc_hash_table (info);
11967 if (htab == NULL)
11968 return FALSE;
11969
11970 suppress_size_errors = FALSE;
11971 stub14_group_size = stub_group_size >> 10;
11972 if (stub_group_size == 1)
11973 {
11974 /* Default values. */
11975 if (stubs_always_before_branch)
11976 {
11977 stub_group_size = 0x1e00000;
11978 stub14_group_size = 0x7800;
11979 }
11980 else
11981 {
11982 stub_group_size = 0x1c00000;
11983 stub14_group_size = 0x7000;
11984 }
11985 suppress_size_errors = TRUE;
11986 }
11987
11988 for (osec = info->output_bfd->sections; osec != NULL; osec = osec->next)
11989 {
11990 asection *tail;
11991
11992 if (osec->id >= htab->sec_info_arr_size)
11993 continue;
11994
11995 tail = htab->sec_info[osec->id].u.list;
11996 while (tail != NULL)
11997 {
11998 asection *curr;
11999 asection *prev;
12000 bfd_size_type total;
12001 bfd_boolean big_sec;
12002 bfd_vma curr_toc;
12003 struct map_stub *group;
12004
12005 curr = tail;
12006 total = tail->size;
12007 big_sec = total > (ppc64_elf_section_data (tail) != NULL
12008 && ppc64_elf_section_data (tail)->has_14bit_branch
12009 ? stub14_group_size : stub_group_size);
12010 if (big_sec && !suppress_size_errors)
12011 (*_bfd_error_handler) (_("%B section %A exceeds stub group size"),
12012 tail->owner, tail);
12013 curr_toc = htab->sec_info[tail->id].toc_off;
12014
12015 while ((prev = htab->sec_info[curr->id].u.list) != NULL
12016 && ((total += curr->output_offset - prev->output_offset)
12017 < (ppc64_elf_section_data (prev) != NULL
12018 && ppc64_elf_section_data (prev)->has_14bit_branch
12019 ? stub14_group_size : stub_group_size))
12020 && htab->sec_info[prev->id].toc_off == curr_toc)
12021 curr = prev;
12022
12023 /* OK, the size from the start of CURR to the end is less
12024 than stub_group_size and thus can be handled by one stub
12025 section. (or the tail section is itself larger than
12026 stub_group_size, in which case we may be toast.) We
12027 should really be keeping track of the total size of stubs
12028 added here, as stubs contribute to the final output
12029 section size. That's a little tricky, and this way will
12030 only break if stubs added make the total size more than
12031 2^25, ie. for the default stub_group_size, if stubs total
12032 more than 2097152 bytes, or nearly 75000 plt call stubs. */
12033 group = bfd_alloc (curr->owner, sizeof (*group));
12034 if (group == NULL)
12035 return FALSE;
12036 group->link_sec = curr;
12037 group->stub_sec = NULL;
12038 group->needs_save_res = 0;
12039 group->next = htab->group;
12040 htab->group = group;
12041 do
12042 {
12043 prev = htab->sec_info[tail->id].u.list;
12044 /* Set up this stub group. */
12045 htab->sec_info[tail->id].u.group = group;
12046 }
12047 while (tail != curr && (tail = prev) != NULL);
12048
12049 /* But wait, there's more! Input sections up to stub_group_size
12050 bytes before the stub section can be handled by it too.
12051 Don't do this if we have a really large section after the
12052 stubs, as adding more stubs increases the chance that
12053 branches may not reach into the stub section. */
12054 if (!stubs_always_before_branch && !big_sec)
12055 {
12056 total = 0;
12057 while (prev != NULL
12058 && ((total += tail->output_offset - prev->output_offset)
12059 < (ppc64_elf_section_data (prev) != NULL
12060 && ppc64_elf_section_data (prev)->has_14bit_branch
12061 ? stub14_group_size : stub_group_size))
12062 && htab->sec_info[prev->id].toc_off == curr_toc)
12063 {
12064 tail = prev;
12065 prev = htab->sec_info[tail->id].u.list;
12066 htab->sec_info[tail->id].u.group = group;
12067 }
12068 }
12069 tail = prev;
12070 }
12071 }
12072 return TRUE;
12073 }
12074
12075 static const unsigned char glink_eh_frame_cie[] =
12076 {
12077 0, 0, 0, 16, /* length. */
12078 0, 0, 0, 0, /* id. */
12079 1, /* CIE version. */
12080 'z', 'R', 0, /* Augmentation string. */
12081 4, /* Code alignment. */
12082 0x78, /* Data alignment. */
12083 65, /* RA reg. */
12084 1, /* Augmentation size. */
12085 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
12086 DW_CFA_def_cfa, 1, 0, /* def_cfa: r1 offset 0. */
12087 0, 0, 0, 0
12088 };
12089
12090 /* Stripping output sections is normally done before dynamic section
12091 symbols have been allocated. This function is called later, and
12092 handles cases like htab->brlt which is mapped to its own output
12093 section. */
12094
12095 static void
12096 maybe_strip_output (struct bfd_link_info *info, asection *isec)
12097 {
12098 if (isec->size == 0
12099 && isec->output_section->size == 0
12100 && !(isec->output_section->flags & SEC_KEEP)
12101 && !bfd_section_removed_from_list (info->output_bfd,
12102 isec->output_section)
12103 && elf_section_data (isec->output_section)->dynindx == 0)
12104 {
12105 isec->output_section->flags |= SEC_EXCLUDE;
12106 bfd_section_list_remove (info->output_bfd, isec->output_section);
12107 info->output_bfd->section_count--;
12108 }
12109 }
12110
12111 /* Determine and set the size of the stub section for a final link.
12112
12113 The basic idea here is to examine all the relocations looking for
12114 PC-relative calls to a target that is unreachable with a "bl"
12115 instruction. */
12116
12117 bfd_boolean
12118 ppc64_elf_size_stubs (struct bfd_link_info *info)
12119 {
12120 bfd_size_type stub_group_size;
12121 bfd_boolean stubs_always_before_branch;
12122 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12123
12124 if (htab == NULL)
12125 return FALSE;
12126
12127 if (htab->params->plt_thread_safe == -1 && !bfd_link_executable (info))
12128 htab->params->plt_thread_safe = 1;
12129 if (!htab->opd_abi)
12130 htab->params->plt_thread_safe = 0;
12131 else if (htab->params->plt_thread_safe == -1)
12132 {
12133 static const char *const thread_starter[] =
12134 {
12135 "pthread_create",
12136 /* libstdc++ */
12137 "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE",
12138 /* librt */
12139 "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio",
12140 "mq_notify", "create_timer",
12141 /* libanl */
12142 "getaddrinfo_a",
12143 /* libgomp */
12144 "GOMP_parallel",
12145 "GOMP_parallel_start",
12146 "GOMP_parallel_loop_static",
12147 "GOMP_parallel_loop_static_start",
12148 "GOMP_parallel_loop_dynamic",
12149 "GOMP_parallel_loop_dynamic_start",
12150 "GOMP_parallel_loop_guided",
12151 "GOMP_parallel_loop_guided_start",
12152 "GOMP_parallel_loop_runtime",
12153 "GOMP_parallel_loop_runtime_start",
12154 "GOMP_parallel_sections",
12155 "GOMP_parallel_sections_start",
12156 /* libgo */
12157 "__go_go",
12158 };
12159 unsigned i;
12160
12161 for (i = 0; i < ARRAY_SIZE (thread_starter); i++)
12162 {
12163 struct elf_link_hash_entry *h;
12164 h = elf_link_hash_lookup (&htab->elf, thread_starter[i],
12165 FALSE, FALSE, TRUE);
12166 htab->params->plt_thread_safe = h != NULL && h->ref_regular;
12167 if (htab->params->plt_thread_safe)
12168 break;
12169 }
12170 }
12171 stubs_always_before_branch = htab->params->group_size < 0;
12172 if (htab->params->group_size < 0)
12173 stub_group_size = -htab->params->group_size;
12174 else
12175 stub_group_size = htab->params->group_size;
12176
12177 if (!group_sections (info, stub_group_size, stubs_always_before_branch))
12178 return FALSE;
12179
12180 while (1)
12181 {
12182 bfd *input_bfd;
12183 unsigned int bfd_indx;
12184 struct map_stub *group;
12185 asection *stub_sec;
12186
12187 htab->stub_iteration += 1;
12188
12189 for (input_bfd = info->input_bfds, bfd_indx = 0;
12190 input_bfd != NULL;
12191 input_bfd = input_bfd->link.next, bfd_indx++)
12192 {
12193 Elf_Internal_Shdr *symtab_hdr;
12194 asection *section;
12195 Elf_Internal_Sym *local_syms = NULL;
12196
12197 if (!is_ppc64_elf (input_bfd))
12198 continue;
12199
12200 /* We'll need the symbol table in a second. */
12201 symtab_hdr = &elf_symtab_hdr (input_bfd);
12202 if (symtab_hdr->sh_info == 0)
12203 continue;
12204
12205 /* Walk over each section attached to the input bfd. */
12206 for (section = input_bfd->sections;
12207 section != NULL;
12208 section = section->next)
12209 {
12210 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
12211
12212 /* If there aren't any relocs, then there's nothing more
12213 to do. */
12214 if ((section->flags & SEC_RELOC) == 0
12215 || (section->flags & SEC_ALLOC) == 0
12216 || (section->flags & SEC_LOAD) == 0
12217 || (section->flags & SEC_CODE) == 0
12218 || section->reloc_count == 0)
12219 continue;
12220
12221 /* If this section is a link-once section that will be
12222 discarded, then don't create any stubs. */
12223 if (section->output_section == NULL
12224 || section->output_section->owner != info->output_bfd)
12225 continue;
12226
12227 /* Get the relocs. */
12228 internal_relocs
12229 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
12230 info->keep_memory);
12231 if (internal_relocs == NULL)
12232 goto error_ret_free_local;
12233
12234 /* Now examine each relocation. */
12235 irela = internal_relocs;
12236 irelaend = irela + section->reloc_count;
12237 for (; irela < irelaend; irela++)
12238 {
12239 enum elf_ppc64_reloc_type r_type;
12240 unsigned int r_indx;
12241 enum ppc_stub_type stub_type;
12242 struct ppc_stub_hash_entry *stub_entry;
12243 asection *sym_sec, *code_sec;
12244 bfd_vma sym_value, code_value;
12245 bfd_vma destination;
12246 unsigned long local_off;
12247 bfd_boolean ok_dest;
12248 struct ppc_link_hash_entry *hash;
12249 struct ppc_link_hash_entry *fdh;
12250 struct elf_link_hash_entry *h;
12251 Elf_Internal_Sym *sym;
12252 char *stub_name;
12253 const asection *id_sec;
12254 struct _opd_sec_data *opd;
12255 struct plt_entry *plt_ent;
12256
12257 r_type = ELF64_R_TYPE (irela->r_info);
12258 r_indx = ELF64_R_SYM (irela->r_info);
12259
12260 if (r_type >= R_PPC64_max)
12261 {
12262 bfd_set_error (bfd_error_bad_value);
12263 goto error_ret_free_internal;
12264 }
12265
12266 /* Only look for stubs on branch instructions. */
12267 if (r_type != R_PPC64_REL24
12268 && r_type != R_PPC64_REL14
12269 && r_type != R_PPC64_REL14_BRTAKEN
12270 && r_type != R_PPC64_REL14_BRNTAKEN)
12271 continue;
12272
12273 /* Now determine the call target, its name, value,
12274 section. */
12275 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
12276 r_indx, input_bfd))
12277 goto error_ret_free_internal;
12278 hash = (struct ppc_link_hash_entry *) h;
12279
12280 ok_dest = FALSE;
12281 fdh = NULL;
12282 sym_value = 0;
12283 if (hash == NULL)
12284 {
12285 sym_value = sym->st_value;
12286 if (sym_sec != NULL
12287 && sym_sec->output_section != NULL)
12288 ok_dest = TRUE;
12289 }
12290 else if (hash->elf.root.type == bfd_link_hash_defined
12291 || hash->elf.root.type == bfd_link_hash_defweak)
12292 {
12293 sym_value = hash->elf.root.u.def.value;
12294 if (sym_sec->output_section != NULL)
12295 ok_dest = TRUE;
12296 }
12297 else if (hash->elf.root.type == bfd_link_hash_undefweak
12298 || hash->elf.root.type == bfd_link_hash_undefined)
12299 {
12300 /* Recognise an old ABI func code entry sym, and
12301 use the func descriptor sym instead if it is
12302 defined. */
12303 if (hash->elf.root.root.string[0] == '.'
12304 && (fdh = lookup_fdh (hash, htab)) != NULL)
12305 {
12306 if (fdh->elf.root.type == bfd_link_hash_defined
12307 || fdh->elf.root.type == bfd_link_hash_defweak)
12308 {
12309 sym_sec = fdh->elf.root.u.def.section;
12310 sym_value = fdh->elf.root.u.def.value;
12311 if (sym_sec->output_section != NULL)
12312 ok_dest = TRUE;
12313 }
12314 else
12315 fdh = NULL;
12316 }
12317 }
12318 else
12319 {
12320 bfd_set_error (bfd_error_bad_value);
12321 goto error_ret_free_internal;
12322 }
12323
12324 destination = 0;
12325 local_off = 0;
12326 if (ok_dest)
12327 {
12328 sym_value += irela->r_addend;
12329 destination = (sym_value
12330 + sym_sec->output_offset
12331 + sym_sec->output_section->vma);
12332 local_off = PPC64_LOCAL_ENTRY_OFFSET (hash
12333 ? hash->elf.other
12334 : sym->st_other);
12335 }
12336
12337 code_sec = sym_sec;
12338 code_value = sym_value;
12339 opd = get_opd_info (sym_sec);
12340 if (opd != NULL)
12341 {
12342 bfd_vma dest;
12343
12344 if (hash == NULL && opd->adjust != NULL)
12345 {
12346 long adjust = opd->adjust[OPD_NDX (sym_value)];
12347 if (adjust == -1)
12348 continue;
12349 code_value += adjust;
12350 sym_value += adjust;
12351 }
12352 dest = opd_entry_value (sym_sec, sym_value,
12353 &code_sec, &code_value, FALSE);
12354 if (dest != (bfd_vma) -1)
12355 {
12356 destination = dest;
12357 if (fdh != NULL)
12358 {
12359 /* Fixup old ABI sym to point at code
12360 entry. */
12361 hash->elf.root.type = bfd_link_hash_defweak;
12362 hash->elf.root.u.def.section = code_sec;
12363 hash->elf.root.u.def.value = code_value;
12364 }
12365 }
12366 }
12367
12368 /* Determine what (if any) linker stub is needed. */
12369 plt_ent = NULL;
12370 stub_type = ppc_type_of_stub (section, irela, &hash,
12371 &plt_ent, destination,
12372 local_off);
12373
12374 if (stub_type != ppc_stub_plt_call)
12375 {
12376 /* Check whether we need a TOC adjusting stub.
12377 Since the linker pastes together pieces from
12378 different object files when creating the
12379 _init and _fini functions, it may be that a
12380 call to what looks like a local sym is in
12381 fact a call needing a TOC adjustment. */
12382 if (code_sec != NULL
12383 && code_sec->output_section != NULL
12384 && (htab->sec_info[code_sec->id].toc_off
12385 != htab->sec_info[section->id].toc_off)
12386 && (code_sec->has_toc_reloc
12387 || code_sec->makes_toc_func_call))
12388 stub_type = ppc_stub_long_branch_r2off;
12389 }
12390
12391 if (stub_type == ppc_stub_none)
12392 continue;
12393
12394 /* __tls_get_addr calls might be eliminated. */
12395 if (stub_type != ppc_stub_plt_call
12396 && hash != NULL
12397 && (hash == htab->tls_get_addr
12398 || hash == htab->tls_get_addr_fd)
12399 && section->has_tls_reloc
12400 && irela != internal_relocs)
12401 {
12402 /* Get tls info. */
12403 unsigned char *tls_mask;
12404
12405 if (!get_tls_mask (&tls_mask, NULL, NULL, &local_syms,
12406 irela - 1, input_bfd))
12407 goto error_ret_free_internal;
12408 if (*tls_mask != 0)
12409 continue;
12410 }
12411
12412 if (stub_type == ppc_stub_plt_call
12413 && irela + 1 < irelaend
12414 && irela[1].r_offset == irela->r_offset + 4
12415 && ELF64_R_TYPE (irela[1].r_info) == R_PPC64_TOCSAVE)
12416 {
12417 if (!tocsave_find (htab, INSERT,
12418 &local_syms, irela + 1, input_bfd))
12419 goto error_ret_free_internal;
12420 }
12421 else if (stub_type == ppc_stub_plt_call)
12422 stub_type = ppc_stub_plt_call_r2save;
12423
12424 /* Support for grouping stub sections. */
12425 id_sec = htab->sec_info[section->id].u.group->link_sec;
12426
12427 /* Get the name of this stub. */
12428 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
12429 if (!stub_name)
12430 goto error_ret_free_internal;
12431
12432 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
12433 stub_name, FALSE, FALSE);
12434 if (stub_entry != NULL)
12435 {
12436 /* The proper stub has already been created. */
12437 free (stub_name);
12438 if (stub_type == ppc_stub_plt_call_r2save)
12439 stub_entry->stub_type = stub_type;
12440 continue;
12441 }
12442
12443 stub_entry = ppc_add_stub (stub_name, section, info);
12444 if (stub_entry == NULL)
12445 {
12446 free (stub_name);
12447 error_ret_free_internal:
12448 if (elf_section_data (section)->relocs == NULL)
12449 free (internal_relocs);
12450 error_ret_free_local:
12451 if (local_syms != NULL
12452 && (symtab_hdr->contents
12453 != (unsigned char *) local_syms))
12454 free (local_syms);
12455 return FALSE;
12456 }
12457
12458 stub_entry->stub_type = stub_type;
12459 if (stub_type != ppc_stub_plt_call
12460 && stub_type != ppc_stub_plt_call_r2save)
12461 {
12462 stub_entry->target_value = code_value;
12463 stub_entry->target_section = code_sec;
12464 }
12465 else
12466 {
12467 stub_entry->target_value = sym_value;
12468 stub_entry->target_section = sym_sec;
12469 }
12470 stub_entry->h = hash;
12471 stub_entry->plt_ent = plt_ent;
12472 stub_entry->other = hash ? hash->elf.other : sym->st_other;
12473
12474 if (stub_entry->h != NULL)
12475 htab->stub_globals += 1;
12476 }
12477
12478 /* We're done with the internal relocs, free them. */
12479 if (elf_section_data (section)->relocs != internal_relocs)
12480 free (internal_relocs);
12481 }
12482
12483 if (local_syms != NULL
12484 && symtab_hdr->contents != (unsigned char *) local_syms)
12485 {
12486 if (!info->keep_memory)
12487 free (local_syms);
12488 else
12489 symtab_hdr->contents = (unsigned char *) local_syms;
12490 }
12491 }
12492
12493 /* We may have added some stubs. Find out the new size of the
12494 stub sections. */
12495 for (stub_sec = htab->params->stub_bfd->sections;
12496 stub_sec != NULL;
12497 stub_sec = stub_sec->next)
12498 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12499 {
12500 stub_sec->rawsize = stub_sec->size;
12501 stub_sec->size = 0;
12502 stub_sec->reloc_count = 0;
12503 stub_sec->flags &= ~SEC_RELOC;
12504 }
12505
12506 htab->brlt->size = 0;
12507 htab->brlt->reloc_count = 0;
12508 htab->brlt->flags &= ~SEC_RELOC;
12509 if (htab->relbrlt != NULL)
12510 htab->relbrlt->size = 0;
12511
12512 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
12513
12514 for (group = htab->group; group != NULL; group = group->next)
12515 if (group->needs_save_res)
12516 group->stub_sec->size += htab->sfpr->size;
12517
12518 if (info->emitrelocations
12519 && htab->glink != NULL && htab->glink->size != 0)
12520 {
12521 htab->glink->reloc_count = 1;
12522 htab->glink->flags |= SEC_RELOC;
12523 }
12524
12525 if (htab->glink_eh_frame != NULL
12526 && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
12527 && htab->glink_eh_frame->output_section->size != 0)
12528 {
12529 size_t size = 0, align;
12530
12531 for (stub_sec = htab->params->stub_bfd->sections;
12532 stub_sec != NULL;
12533 stub_sec = stub_sec->next)
12534 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12535 size += 24;
12536 if (htab->glink != NULL && htab->glink->size != 0)
12537 size += 24;
12538 if (size != 0)
12539 size += sizeof (glink_eh_frame_cie);
12540 align = 1;
12541 align <<= htab->glink_eh_frame->output_section->alignment_power;
12542 align -= 1;
12543 size = (size + align) & ~align;
12544 htab->glink_eh_frame->rawsize = htab->glink_eh_frame->size;
12545 htab->glink_eh_frame->size = size;
12546 }
12547
12548 if (htab->params->plt_stub_align != 0)
12549 for (stub_sec = htab->params->stub_bfd->sections;
12550 stub_sec != NULL;
12551 stub_sec = stub_sec->next)
12552 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12553 stub_sec->size = ((stub_sec->size
12554 + (1 << htab->params->plt_stub_align) - 1)
12555 & -(1 << htab->params->plt_stub_align));
12556
12557 for (stub_sec = htab->params->stub_bfd->sections;
12558 stub_sec != NULL;
12559 stub_sec = stub_sec->next)
12560 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
12561 && stub_sec->rawsize != stub_sec->size)
12562 break;
12563
12564 /* Exit from this loop when no stubs have been added, and no stubs
12565 have changed size. */
12566 if (stub_sec == NULL
12567 && (htab->glink_eh_frame == NULL
12568 || htab->glink_eh_frame->rawsize == htab->glink_eh_frame->size))
12569 break;
12570
12571 /* Ask the linker to do its stuff. */
12572 (*htab->params->layout_sections_again) ();
12573 }
12574
12575 if (htab->glink_eh_frame != NULL
12576 && htab->glink_eh_frame->size != 0)
12577 {
12578 bfd_vma val;
12579 bfd_byte *p, *last_fde;
12580 size_t last_fde_len, size, align, pad;
12581 asection *stub_sec;
12582
12583 p = bfd_zalloc (htab->glink_eh_frame->owner, htab->glink_eh_frame->size);
12584 if (p == NULL)
12585 return FALSE;
12586 htab->glink_eh_frame->contents = p;
12587 last_fde = p;
12588
12589 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
12590 /* CIE length (rewrite in case little-endian). */
12591 last_fde_len = sizeof (glink_eh_frame_cie) - 4;
12592 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
12593 p += sizeof (glink_eh_frame_cie);
12594
12595 for (stub_sec = htab->params->stub_bfd->sections;
12596 stub_sec != NULL;
12597 stub_sec = stub_sec->next)
12598 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12599 {
12600 last_fde = p;
12601 last_fde_len = 20;
12602 /* FDE length. */
12603 bfd_put_32 (htab->elf.dynobj, 20, p);
12604 p += 4;
12605 /* CIE pointer. */
12606 val = p - htab->glink_eh_frame->contents;
12607 bfd_put_32 (htab->elf.dynobj, val, p);
12608 p += 4;
12609 /* Offset to stub section, written later. */
12610 p += 4;
12611 /* stub section size. */
12612 bfd_put_32 (htab->elf.dynobj, stub_sec->size, p);
12613 p += 4;
12614 /* Augmentation. */
12615 p += 1;
12616 /* Pad. */
12617 p += 7;
12618 }
12619 if (htab->glink != NULL && htab->glink->size != 0)
12620 {
12621 last_fde = p;
12622 last_fde_len = 20;
12623 /* FDE length. */
12624 bfd_put_32 (htab->elf.dynobj, 20, p);
12625 p += 4;
12626 /* CIE pointer. */
12627 val = p - htab->glink_eh_frame->contents;
12628 bfd_put_32 (htab->elf.dynobj, val, p);
12629 p += 4;
12630 /* Offset to .glink, written later. */
12631 p += 4;
12632 /* .glink size. */
12633 bfd_put_32 (htab->elf.dynobj, htab->glink->size - 8, p);
12634 p += 4;
12635 /* Augmentation. */
12636 p += 1;
12637
12638 *p++ = DW_CFA_advance_loc + 1;
12639 *p++ = DW_CFA_register;
12640 *p++ = 65;
12641 *p++ = htab->opd_abi ? 12 : 0;
12642 *p++ = DW_CFA_advance_loc + 4;
12643 *p++ = DW_CFA_restore_extended;
12644 *p++ = 65;
12645 }
12646 /* Subsume any padding into the last FDE if user .eh_frame
12647 sections are aligned more than glink_eh_frame. Otherwise any
12648 zero padding will be seen as a terminator. */
12649 size = p - htab->glink_eh_frame->contents;
12650 align = 1;
12651 align <<= htab->glink_eh_frame->output_section->alignment_power;
12652 align -= 1;
12653 pad = ((size + align) & ~align) - size;
12654 htab->glink_eh_frame->size = size + pad;
12655 bfd_put_32 (htab->elf.dynobj, last_fde_len + pad, last_fde);
12656 }
12657
12658 maybe_strip_output (info, htab->brlt);
12659 if (htab->glink_eh_frame != NULL)
12660 maybe_strip_output (info, htab->glink_eh_frame);
12661
12662 return TRUE;
12663 }
12664
12665 /* Called after we have determined section placement. If sections
12666 move, we'll be called again. Provide a value for TOCstart. */
12667
12668 bfd_vma
12669 ppc64_elf_set_toc (struct bfd_link_info *info, bfd *obfd)
12670 {
12671 asection *s;
12672 bfd_vma TOCstart, adjust;
12673
12674 if (info != NULL)
12675 {
12676 struct elf_link_hash_entry *h;
12677 struct elf_link_hash_table *htab = elf_hash_table (info);
12678
12679 if (is_elf_hash_table (htab)
12680 && htab->hgot != NULL)
12681 h = htab->hgot;
12682 else
12683 {
12684 h = elf_link_hash_lookup (htab, ".TOC.", FALSE, FALSE, TRUE);
12685 if (is_elf_hash_table (htab))
12686 htab->hgot = h;
12687 }
12688 if (h != NULL
12689 && h->root.type == bfd_link_hash_defined
12690 && !h->root.linker_def
12691 && (!is_elf_hash_table (htab)
12692 || h->def_regular))
12693 {
12694 TOCstart = (h->root.u.def.value - TOC_BASE_OFF
12695 + h->root.u.def.section->output_offset
12696 + h->root.u.def.section->output_section->vma);
12697 _bfd_set_gp_value (obfd, TOCstart);
12698 return TOCstart;
12699 }
12700 }
12701
12702 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
12703 order. The TOC starts where the first of these sections starts. */
12704 s = bfd_get_section_by_name (obfd, ".got");
12705 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12706 s = bfd_get_section_by_name (obfd, ".toc");
12707 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12708 s = bfd_get_section_by_name (obfd, ".tocbss");
12709 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12710 s = bfd_get_section_by_name (obfd, ".plt");
12711 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12712 {
12713 /* This may happen for
12714 o references to TOC base (SYM@toc / TOC[tc0]) without a
12715 .toc directive
12716 o bad linker script
12717 o --gc-sections and empty TOC sections
12718
12719 FIXME: Warn user? */
12720
12721 /* Look for a likely section. We probably won't even be
12722 using TOCstart. */
12723 for (s = obfd->sections; s != NULL; s = s->next)
12724 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY
12725 | SEC_EXCLUDE))
12726 == (SEC_ALLOC | SEC_SMALL_DATA))
12727 break;
12728 if (s == NULL)
12729 for (s = obfd->sections; s != NULL; s = s->next)
12730 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_EXCLUDE))
12731 == (SEC_ALLOC | SEC_SMALL_DATA))
12732 break;
12733 if (s == NULL)
12734 for (s = obfd->sections; s != NULL; s = s->next)
12735 if ((s->flags & (SEC_ALLOC | SEC_READONLY | SEC_EXCLUDE))
12736 == SEC_ALLOC)
12737 break;
12738 if (s == NULL)
12739 for (s = obfd->sections; s != NULL; s = s->next)
12740 if ((s->flags & (SEC_ALLOC | SEC_EXCLUDE)) == SEC_ALLOC)
12741 break;
12742 }
12743
12744 TOCstart = 0;
12745 if (s != NULL)
12746 TOCstart = s->output_section->vma + s->output_offset;
12747
12748 /* Force alignment. */
12749 adjust = TOCstart & (TOC_BASE_ALIGN - 1);
12750 TOCstart -= adjust;
12751 _bfd_set_gp_value (obfd, TOCstart);
12752
12753 if (info != NULL && s != NULL)
12754 {
12755 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12756
12757 if (htab != NULL)
12758 {
12759 if (htab->elf.hgot != NULL)
12760 {
12761 htab->elf.hgot->root.u.def.value = TOC_BASE_OFF - adjust;
12762 htab->elf.hgot->root.u.def.section = s;
12763 }
12764 }
12765 else
12766 {
12767 struct bfd_link_hash_entry *bh = NULL;
12768 _bfd_generic_link_add_one_symbol (info, obfd, ".TOC.", BSF_GLOBAL,
12769 s, TOC_BASE_OFF - adjust,
12770 NULL, FALSE, FALSE, &bh);
12771 }
12772 }
12773 return TOCstart;
12774 }
12775
12776 /* Called via elf_link_hash_traverse from ppc64_elf_build_stubs to
12777 write out any global entry stubs. */
12778
12779 static bfd_boolean
12780 build_global_entry_stubs (struct elf_link_hash_entry *h, void *inf)
12781 {
12782 struct bfd_link_info *info;
12783 struct ppc_link_hash_table *htab;
12784 struct plt_entry *pent;
12785 asection *s;
12786
12787 if (h->root.type == bfd_link_hash_indirect)
12788 return TRUE;
12789
12790 if (!h->pointer_equality_needed)
12791 return TRUE;
12792
12793 if (h->def_regular)
12794 return TRUE;
12795
12796 info = inf;
12797 htab = ppc_hash_table (info);
12798 if (htab == NULL)
12799 return FALSE;
12800
12801 s = htab->glink;
12802 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
12803 if (pent->plt.offset != (bfd_vma) -1
12804 && pent->addend == 0)
12805 {
12806 bfd_byte *p;
12807 asection *plt;
12808 bfd_vma off;
12809
12810 p = s->contents + h->root.u.def.value;
12811 plt = htab->elf.splt;
12812 if (!htab->elf.dynamic_sections_created
12813 || h->dynindx == -1)
12814 plt = htab->elf.iplt;
12815 off = pent->plt.offset + plt->output_offset + plt->output_section->vma;
12816 off -= h->root.u.def.value + s->output_offset + s->output_section->vma;
12817
12818 if (off + 0x80008000 > 0xffffffff || (off & 3) != 0)
12819 {
12820 info->callbacks->einfo
12821 (_("%P: linkage table error against `%T'\n"),
12822 h->root.root.string);
12823 bfd_set_error (bfd_error_bad_value);
12824 htab->stub_error = TRUE;
12825 }
12826
12827 htab->stub_count[ppc_stub_global_entry - 1] += 1;
12828 if (htab->params->emit_stub_syms)
12829 {
12830 size_t len = strlen (h->root.root.string);
12831 char *name = bfd_malloc (sizeof "12345678.global_entry." + len);
12832
12833 if (name == NULL)
12834 return FALSE;
12835
12836 sprintf (name, "%08x.global_entry.%s", s->id, h->root.root.string);
12837 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
12838 if (h == NULL)
12839 return FALSE;
12840 if (h->root.type == bfd_link_hash_new)
12841 {
12842 h->root.type = bfd_link_hash_defined;
12843 h->root.u.def.section = s;
12844 h->root.u.def.value = p - s->contents;
12845 h->ref_regular = 1;
12846 h->def_regular = 1;
12847 h->ref_regular_nonweak = 1;
12848 h->forced_local = 1;
12849 h->non_elf = 0;
12850 h->root.linker_def = 1;
12851 }
12852 }
12853
12854 if (PPC_HA (off) != 0)
12855 {
12856 bfd_put_32 (s->owner, ADDIS_R12_R12 | PPC_HA (off), p);
12857 p += 4;
12858 }
12859 bfd_put_32 (s->owner, LD_R12_0R12 | PPC_LO (off), p);
12860 p += 4;
12861 bfd_put_32 (s->owner, MTCTR_R12, p);
12862 p += 4;
12863 bfd_put_32 (s->owner, BCTR, p);
12864 break;
12865 }
12866 return TRUE;
12867 }
12868
12869 /* Build all the stubs associated with the current output file.
12870 The stubs are kept in a hash table attached to the main linker
12871 hash table. This function is called via gldelf64ppc_finish. */
12872
12873 bfd_boolean
12874 ppc64_elf_build_stubs (struct bfd_link_info *info,
12875 char **stats)
12876 {
12877 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12878 struct map_stub *group;
12879 asection *stub_sec;
12880 bfd_byte *p;
12881 int stub_sec_count = 0;
12882
12883 if (htab == NULL)
12884 return FALSE;
12885
12886 /* Allocate memory to hold the linker stubs. */
12887 for (stub_sec = htab->params->stub_bfd->sections;
12888 stub_sec != NULL;
12889 stub_sec = stub_sec->next)
12890 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
12891 && stub_sec->size != 0)
12892 {
12893 stub_sec->contents = bfd_zalloc (htab->params->stub_bfd, stub_sec->size);
12894 if (stub_sec->contents == NULL)
12895 return FALSE;
12896 /* We want to check that built size is the same as calculated
12897 size. rawsize is a convenient location to use. */
12898 stub_sec->rawsize = stub_sec->size;
12899 stub_sec->size = 0;
12900 }
12901
12902 if (htab->glink != NULL && htab->glink->size != 0)
12903 {
12904 unsigned int indx;
12905 bfd_vma plt0;
12906
12907 /* Build the .glink plt call stub. */
12908 if (htab->params->emit_stub_syms)
12909 {
12910 struct elf_link_hash_entry *h;
12911 h = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
12912 TRUE, FALSE, FALSE);
12913 if (h == NULL)
12914 return FALSE;
12915 if (h->root.type == bfd_link_hash_new)
12916 {
12917 h->root.type = bfd_link_hash_defined;
12918 h->root.u.def.section = htab->glink;
12919 h->root.u.def.value = 8;
12920 h->ref_regular = 1;
12921 h->def_regular = 1;
12922 h->ref_regular_nonweak = 1;
12923 h->forced_local = 1;
12924 h->non_elf = 0;
12925 h->root.linker_def = 1;
12926 }
12927 }
12928 plt0 = (htab->elf.splt->output_section->vma
12929 + htab->elf.splt->output_offset
12930 - 16);
12931 if (info->emitrelocations)
12932 {
12933 Elf_Internal_Rela *r = get_relocs (htab->glink, 1);
12934 if (r == NULL)
12935 return FALSE;
12936 r->r_offset = (htab->glink->output_offset
12937 + htab->glink->output_section->vma);
12938 r->r_info = ELF64_R_INFO (0, R_PPC64_REL64);
12939 r->r_addend = plt0;
12940 }
12941 p = htab->glink->contents;
12942 plt0 -= htab->glink->output_section->vma + htab->glink->output_offset;
12943 bfd_put_64 (htab->glink->owner, plt0, p);
12944 p += 8;
12945 if (htab->opd_abi)
12946 {
12947 bfd_put_32 (htab->glink->owner, MFLR_R12, p);
12948 p += 4;
12949 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
12950 p += 4;
12951 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
12952 p += 4;
12953 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | (-16 & 0xfffc), p);
12954 p += 4;
12955 bfd_put_32 (htab->glink->owner, MTLR_R12, p);
12956 p += 4;
12957 bfd_put_32 (htab->glink->owner, ADD_R11_R2_R11, p);
12958 p += 4;
12959 bfd_put_32 (htab->glink->owner, LD_R12_0R11, p);
12960 p += 4;
12961 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | 8, p);
12962 p += 4;
12963 bfd_put_32 (htab->glink->owner, MTCTR_R12, p);
12964 p += 4;
12965 bfd_put_32 (htab->glink->owner, LD_R11_0R11 | 16, p);
12966 p += 4;
12967 }
12968 else
12969 {
12970 bfd_put_32 (htab->glink->owner, MFLR_R0, p);
12971 p += 4;
12972 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
12973 p += 4;
12974 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
12975 p += 4;
12976 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | (-16 & 0xfffc), p);
12977 p += 4;
12978 bfd_put_32 (htab->glink->owner, MTLR_R0, p);
12979 p += 4;
12980 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
12981 p += 4;
12982 bfd_put_32 (htab->glink->owner, ADD_R11_R2_R11, p);
12983 p += 4;
12984 bfd_put_32 (htab->glink->owner, ADDI_R0_R12 | (-48 & 0xffff), p);
12985 p += 4;
12986 bfd_put_32 (htab->glink->owner, LD_R12_0R11, p);
12987 p += 4;
12988 bfd_put_32 (htab->glink->owner, SRDI_R0_R0_2, p);
12989 p += 4;
12990 bfd_put_32 (htab->glink->owner, MTCTR_R12, p);
12991 p += 4;
12992 bfd_put_32 (htab->glink->owner, LD_R11_0R11 | 8, p);
12993 p += 4;
12994 }
12995 bfd_put_32 (htab->glink->owner, BCTR, p);
12996 p += 4;
12997 while (p - htab->glink->contents < GLINK_CALL_STUB_SIZE)
12998 {
12999 bfd_put_32 (htab->glink->owner, NOP, p);
13000 p += 4;
13001 }
13002
13003 /* Build the .glink lazy link call stubs. */
13004 indx = 0;
13005 while (p < htab->glink->contents + htab->glink->rawsize)
13006 {
13007 if (htab->opd_abi)
13008 {
13009 if (indx < 0x8000)
13010 {
13011 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
13012 p += 4;
13013 }
13014 else
13015 {
13016 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
13017 p += 4;
13018 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx),
13019 p);
13020 p += 4;
13021 }
13022 }
13023 bfd_put_32 (htab->glink->owner,
13024 B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p);
13025 indx++;
13026 p += 4;
13027 }
13028
13029 /* Build .glink global entry stubs. */
13030 if (htab->glink->size > htab->glink->rawsize)
13031 elf_link_hash_traverse (&htab->elf, build_global_entry_stubs, info);
13032 }
13033
13034 if (htab->brlt != NULL && htab->brlt->size != 0)
13035 {
13036 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
13037 htab->brlt->size);
13038 if (htab->brlt->contents == NULL)
13039 return FALSE;
13040 }
13041 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
13042 {
13043 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
13044 htab->relbrlt->size);
13045 if (htab->relbrlt->contents == NULL)
13046 return FALSE;
13047 }
13048
13049 /* Build the stubs as directed by the stub hash table. */
13050 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
13051
13052 for (group = htab->group; group != NULL; group = group->next)
13053 if (group->needs_save_res)
13054 {
13055 stub_sec = group->stub_sec;
13056 memcpy (stub_sec->contents + stub_sec->size, htab->sfpr->contents,
13057 htab->sfpr->size);
13058 if (htab->params->emit_stub_syms)
13059 {
13060 unsigned int i;
13061
13062 for (i = 0; i < ARRAY_SIZE (save_res_funcs); i++)
13063 if (!sfpr_define (info, &save_res_funcs[i], stub_sec))
13064 return FALSE;
13065 }
13066 stub_sec->size += htab->sfpr->size;
13067 }
13068
13069 if (htab->relbrlt != NULL)
13070 htab->relbrlt->reloc_count = 0;
13071
13072 if (htab->params->plt_stub_align != 0)
13073 for (stub_sec = htab->params->stub_bfd->sections;
13074 stub_sec != NULL;
13075 stub_sec = stub_sec->next)
13076 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
13077 stub_sec->size = ((stub_sec->size
13078 + (1 << htab->params->plt_stub_align) - 1)
13079 & -(1 << htab->params->plt_stub_align));
13080
13081 for (stub_sec = htab->params->stub_bfd->sections;
13082 stub_sec != NULL;
13083 stub_sec = stub_sec->next)
13084 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
13085 {
13086 stub_sec_count += 1;
13087 if (stub_sec->rawsize != stub_sec->size)
13088 break;
13089 }
13090
13091 /* Note that the glink_eh_frame check here is not only testing that
13092 the generated size matched the calculated size but also that
13093 bfd_elf_discard_info didn't make any changes to the section. */
13094 if (stub_sec != NULL
13095 || (htab->glink_eh_frame != NULL
13096 && htab->glink_eh_frame->rawsize != htab->glink_eh_frame->size))
13097 {
13098 htab->stub_error = TRUE;
13099 info->callbacks->einfo (_("%P: stubs don't match calculated size\n"));
13100 }
13101
13102 if (htab->stub_error)
13103 return FALSE;
13104
13105 if (stats != NULL)
13106 {
13107 *stats = bfd_malloc (500);
13108 if (*stats == NULL)
13109 return FALSE;
13110
13111 sprintf (*stats, _("linker stubs in %u group%s\n"
13112 " branch %lu\n"
13113 " toc adjust %lu\n"
13114 " long branch %lu\n"
13115 " long toc adj %lu\n"
13116 " plt call %lu\n"
13117 " plt call toc %lu\n"
13118 " global entry %lu"),
13119 stub_sec_count,
13120 stub_sec_count == 1 ? "" : "s",
13121 htab->stub_count[ppc_stub_long_branch - 1],
13122 htab->stub_count[ppc_stub_long_branch_r2off - 1],
13123 htab->stub_count[ppc_stub_plt_branch - 1],
13124 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
13125 htab->stub_count[ppc_stub_plt_call - 1],
13126 htab->stub_count[ppc_stub_plt_call_r2save - 1],
13127 htab->stub_count[ppc_stub_global_entry - 1]);
13128 }
13129 return TRUE;
13130 }
13131
13132 /* This function undoes the changes made by add_symbol_adjust. */
13133
13134 static bfd_boolean
13135 undo_symbol_twiddle (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
13136 {
13137 struct ppc_link_hash_entry *eh;
13138
13139 if (h->root.type == bfd_link_hash_indirect)
13140 return TRUE;
13141
13142 eh = (struct ppc_link_hash_entry *) h;
13143 if (eh->elf.root.type != bfd_link_hash_undefweak || !eh->was_undefined)
13144 return TRUE;
13145
13146 eh->elf.root.type = bfd_link_hash_undefined;
13147 return TRUE;
13148 }
13149
13150 void
13151 ppc64_elf_restore_symbols (struct bfd_link_info *info)
13152 {
13153 struct ppc_link_hash_table *htab = ppc_hash_table (info);
13154
13155 if (htab != NULL)
13156 elf_link_hash_traverse (&htab->elf, undo_symbol_twiddle, info);
13157 }
13158
13159 /* What to do when ld finds relocations against symbols defined in
13160 discarded sections. */
13161
13162 static unsigned int
13163 ppc64_elf_action_discarded (asection *sec)
13164 {
13165 if (strcmp (".opd", sec->name) == 0)
13166 return 0;
13167
13168 if (strcmp (".toc", sec->name) == 0)
13169 return 0;
13170
13171 if (strcmp (".toc1", sec->name) == 0)
13172 return 0;
13173
13174 return _bfd_elf_default_action_discarded (sec);
13175 }
13176
13177 /* The RELOCATE_SECTION function is called by the ELF backend linker
13178 to handle the relocations for a section.
13179
13180 The relocs are always passed as Rela structures; if the section
13181 actually uses Rel structures, the r_addend field will always be
13182 zero.
13183
13184 This function is responsible for adjust the section contents as
13185 necessary, and (if using Rela relocs and generating a
13186 relocatable output file) adjusting the reloc addend as
13187 necessary.
13188
13189 This function does not have to worry about setting the reloc
13190 address or the reloc symbol index.
13191
13192 LOCAL_SYMS is a pointer to the swapped in local symbols.
13193
13194 LOCAL_SECTIONS is an array giving the section in the input file
13195 corresponding to the st_shndx field of each local symbol.
13196
13197 The global hash table entry for the global symbols can be found
13198 via elf_sym_hashes (input_bfd).
13199
13200 When generating relocatable output, this function must handle
13201 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
13202 going to be the section symbol corresponding to the output
13203 section, which means that the addend must be adjusted
13204 accordingly. */
13205
13206 static bfd_boolean
13207 ppc64_elf_relocate_section (bfd *output_bfd,
13208 struct bfd_link_info *info,
13209 bfd *input_bfd,
13210 asection *input_section,
13211 bfd_byte *contents,
13212 Elf_Internal_Rela *relocs,
13213 Elf_Internal_Sym *local_syms,
13214 asection **local_sections)
13215 {
13216 struct ppc_link_hash_table *htab;
13217 Elf_Internal_Shdr *symtab_hdr;
13218 struct elf_link_hash_entry **sym_hashes;
13219 Elf_Internal_Rela *rel;
13220 Elf_Internal_Rela *wrel;
13221 Elf_Internal_Rela *relend;
13222 Elf_Internal_Rela outrel;
13223 bfd_byte *loc;
13224 struct got_entry **local_got_ents;
13225 bfd_vma TOCstart;
13226 bfd_boolean ret = TRUE;
13227 bfd_boolean is_opd;
13228 /* Assume 'at' branch hints. */
13229 bfd_boolean is_isa_v2 = TRUE;
13230 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
13231
13232 /* Initialize howto table if needed. */
13233 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
13234 ppc_howto_init ();
13235
13236 htab = ppc_hash_table (info);
13237 if (htab == NULL)
13238 return FALSE;
13239
13240 /* Don't relocate stub sections. */
13241 if (input_section->owner == htab->params->stub_bfd)
13242 return TRUE;
13243
13244 BFD_ASSERT (is_ppc64_elf (input_bfd));
13245
13246 local_got_ents = elf_local_got_ents (input_bfd);
13247 TOCstart = elf_gp (output_bfd);
13248 symtab_hdr = &elf_symtab_hdr (input_bfd);
13249 sym_hashes = elf_sym_hashes (input_bfd);
13250 is_opd = ppc64_elf_section_data (input_section)->sec_type == sec_opd;
13251
13252 rel = wrel = relocs;
13253 relend = relocs + input_section->reloc_count;
13254 for (; rel < relend; wrel++, rel++)
13255 {
13256 enum elf_ppc64_reloc_type r_type;
13257 bfd_vma addend;
13258 bfd_reloc_status_type r;
13259 Elf_Internal_Sym *sym;
13260 asection *sec;
13261 struct elf_link_hash_entry *h_elf;
13262 struct ppc_link_hash_entry *h;
13263 struct ppc_link_hash_entry *fdh;
13264 const char *sym_name;
13265 unsigned long r_symndx, toc_symndx;
13266 bfd_vma toc_addend;
13267 unsigned char tls_mask, tls_gd, tls_type;
13268 unsigned char sym_type;
13269 bfd_vma relocation;
13270 bfd_boolean unresolved_reloc;
13271 bfd_boolean warned;
13272 enum { DEST_NORMAL, DEST_OPD, DEST_STUB } reloc_dest;
13273 unsigned int insn;
13274 unsigned int mask;
13275 struct ppc_stub_hash_entry *stub_entry;
13276 bfd_vma max_br_offset;
13277 bfd_vma from;
13278 Elf_Internal_Rela orig_rel;
13279 reloc_howto_type *howto;
13280 struct reloc_howto_struct alt_howto;
13281
13282 again:
13283 orig_rel = *rel;
13284
13285 r_type = ELF64_R_TYPE (rel->r_info);
13286 r_symndx = ELF64_R_SYM (rel->r_info);
13287
13288 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
13289 symbol of the previous ADDR64 reloc. The symbol gives us the
13290 proper TOC base to use. */
13291 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
13292 && wrel != relocs
13293 && ELF64_R_TYPE (wrel[-1].r_info) == R_PPC64_ADDR64
13294 && is_opd)
13295 r_symndx = ELF64_R_SYM (wrel[-1].r_info);
13296
13297 sym = NULL;
13298 sec = NULL;
13299 h_elf = NULL;
13300 sym_name = NULL;
13301 unresolved_reloc = FALSE;
13302 warned = FALSE;
13303
13304 if (r_symndx < symtab_hdr->sh_info)
13305 {
13306 /* It's a local symbol. */
13307 struct _opd_sec_data *opd;
13308
13309 sym = local_syms + r_symndx;
13310 sec = local_sections[r_symndx];
13311 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
13312 sym_type = ELF64_ST_TYPE (sym->st_info);
13313 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
13314 opd = get_opd_info (sec);
13315 if (opd != NULL && opd->adjust != NULL)
13316 {
13317 long adjust = opd->adjust[OPD_NDX (sym->st_value
13318 + rel->r_addend)];
13319 if (adjust == -1)
13320 relocation = 0;
13321 else
13322 {
13323 /* If this is a relocation against the opd section sym
13324 and we have edited .opd, adjust the reloc addend so
13325 that ld -r and ld --emit-relocs output is correct.
13326 If it is a reloc against some other .opd symbol,
13327 then the symbol value will be adjusted later. */
13328 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
13329 rel->r_addend += adjust;
13330 else
13331 relocation += adjust;
13332 }
13333 }
13334 }
13335 else
13336 {
13337 bfd_boolean ignored;
13338
13339 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
13340 r_symndx, symtab_hdr, sym_hashes,
13341 h_elf, sec, relocation,
13342 unresolved_reloc, warned, ignored);
13343 sym_name = h_elf->root.root.string;
13344 sym_type = h_elf->type;
13345 if (sec != NULL
13346 && sec->owner == output_bfd
13347 && strcmp (sec->name, ".opd") == 0)
13348 {
13349 /* This is a symbol defined in a linker script. All
13350 such are defined in output sections, even those
13351 defined by simple assignment from a symbol defined in
13352 an input section. Transfer the symbol to an
13353 appropriate input .opd section, so that a branch to
13354 this symbol will be mapped to the location specified
13355 by the opd entry. */
13356 struct bfd_link_order *lo;
13357 for (lo = sec->map_head.link_order; lo != NULL; lo = lo->next)
13358 if (lo->type == bfd_indirect_link_order)
13359 {
13360 asection *isec = lo->u.indirect.section;
13361 if (h_elf->root.u.def.value >= isec->output_offset
13362 && h_elf->root.u.def.value < (isec->output_offset
13363 + isec->size))
13364 {
13365 h_elf->root.u.def.value -= isec->output_offset;
13366 h_elf->root.u.def.section = isec;
13367 sec = isec;
13368 break;
13369 }
13370 }
13371 }
13372 }
13373 h = (struct ppc_link_hash_entry *) h_elf;
13374
13375 if (sec != NULL && discarded_section (sec))
13376 {
13377 _bfd_clear_contents (ppc64_elf_howto_table[r_type],
13378 input_bfd, input_section,
13379 contents + rel->r_offset);
13380 wrel->r_offset = rel->r_offset;
13381 wrel->r_info = 0;
13382 wrel->r_addend = 0;
13383
13384 /* For ld -r, remove relocations in debug sections against
13385 sections defined in discarded sections. Not done for
13386 non-debug to preserve relocs in .eh_frame which the
13387 eh_frame editing code expects to be present. */
13388 if (bfd_link_relocatable (info)
13389 && (input_section->flags & SEC_DEBUGGING))
13390 wrel--;
13391
13392 continue;
13393 }
13394
13395 if (bfd_link_relocatable (info))
13396 goto copy_reloc;
13397
13398 if (h != NULL && &h->elf == htab->elf.hgot)
13399 {
13400 relocation = TOCstart + htab->sec_info[input_section->id].toc_off;
13401 sec = bfd_abs_section_ptr;
13402 unresolved_reloc = FALSE;
13403 }
13404
13405 /* TLS optimizations. Replace instruction sequences and relocs
13406 based on information we collected in tls_optimize. We edit
13407 RELOCS so that --emit-relocs will output something sensible
13408 for the final instruction stream. */
13409 tls_mask = 0;
13410 tls_gd = 0;
13411 toc_symndx = 0;
13412 if (h != NULL)
13413 tls_mask = h->tls_mask;
13414 else if (local_got_ents != NULL)
13415 {
13416 struct plt_entry **local_plt = (struct plt_entry **)
13417 (local_got_ents + symtab_hdr->sh_info);
13418 unsigned char *lgot_masks = (unsigned char *)
13419 (local_plt + symtab_hdr->sh_info);
13420 tls_mask = lgot_masks[r_symndx];
13421 }
13422 if (tls_mask == 0
13423 && (r_type == R_PPC64_TLS
13424 || r_type == R_PPC64_TLSGD
13425 || r_type == R_PPC64_TLSLD))
13426 {
13427 /* Check for toc tls entries. */
13428 unsigned char *toc_tls;
13429
13430 if (!get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
13431 &local_syms, rel, input_bfd))
13432 return FALSE;
13433
13434 if (toc_tls)
13435 tls_mask = *toc_tls;
13436 }
13437
13438 /* Check that tls relocs are used with tls syms, and non-tls
13439 relocs are used with non-tls syms. */
13440 if (r_symndx != STN_UNDEF
13441 && r_type != R_PPC64_NONE
13442 && (h == NULL
13443 || h->elf.root.type == bfd_link_hash_defined
13444 || h->elf.root.type == bfd_link_hash_defweak)
13445 && (IS_PPC64_TLS_RELOC (r_type)
13446 != (sym_type == STT_TLS
13447 || (sym_type == STT_SECTION
13448 && (sec->flags & SEC_THREAD_LOCAL) != 0))))
13449 {
13450 if (tls_mask != 0
13451 && (r_type == R_PPC64_TLS
13452 || r_type == R_PPC64_TLSGD
13453 || r_type == R_PPC64_TLSLD))
13454 /* R_PPC64_TLS is OK against a symbol in the TOC. */
13455 ;
13456 else
13457 info->callbacks->einfo
13458 (!IS_PPC64_TLS_RELOC (r_type)
13459 ? _("%P: %H: %s used with TLS symbol `%T'\n")
13460 : _("%P: %H: %s used with non-TLS symbol `%T'\n"),
13461 input_bfd, input_section, rel->r_offset,
13462 ppc64_elf_howto_table[r_type]->name,
13463 sym_name);
13464 }
13465
13466 /* Ensure reloc mapping code below stays sane. */
13467 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
13468 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
13469 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
13470 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
13471 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
13472 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
13473 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
13474 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
13475 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
13476 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
13477 abort ();
13478
13479 switch (r_type)
13480 {
13481 default:
13482 break;
13483
13484 case R_PPC64_LO_DS_OPT:
13485 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
13486 if ((insn & (0x3f << 26)) != 58u << 26)
13487 abort ();
13488 insn += (14u << 26) - (58u << 26);
13489 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
13490 r_type = R_PPC64_TOC16_LO;
13491 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13492 break;
13493
13494 case R_PPC64_TOC16:
13495 case R_PPC64_TOC16_LO:
13496 case R_PPC64_TOC16_DS:
13497 case R_PPC64_TOC16_LO_DS:
13498 {
13499 /* Check for toc tls entries. */
13500 unsigned char *toc_tls;
13501 int retval;
13502
13503 retval = get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
13504 &local_syms, rel, input_bfd);
13505 if (retval == 0)
13506 return FALSE;
13507
13508 if (toc_tls)
13509 {
13510 tls_mask = *toc_tls;
13511 if (r_type == R_PPC64_TOC16_DS
13512 || r_type == R_PPC64_TOC16_LO_DS)
13513 {
13514 if (tls_mask != 0
13515 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
13516 goto toctprel;
13517 }
13518 else
13519 {
13520 /* If we found a GD reloc pair, then we might be
13521 doing a GD->IE transition. */
13522 if (retval == 2)
13523 {
13524 tls_gd = TLS_TPRELGD;
13525 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13526 goto tls_ldgd_opt;
13527 }
13528 else if (retval == 3)
13529 {
13530 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13531 goto tls_ldgd_opt;
13532 }
13533 }
13534 }
13535 }
13536 break;
13537
13538 case R_PPC64_GOT_TPREL16_HI:
13539 case R_PPC64_GOT_TPREL16_HA:
13540 if (tls_mask != 0
13541 && (tls_mask & TLS_TPREL) == 0)
13542 {
13543 rel->r_offset -= d_offset;
13544 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
13545 r_type = R_PPC64_NONE;
13546 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13547 }
13548 break;
13549
13550 case R_PPC64_GOT_TPREL16_DS:
13551 case R_PPC64_GOT_TPREL16_LO_DS:
13552 if (tls_mask != 0
13553 && (tls_mask & TLS_TPREL) == 0)
13554 {
13555 toctprel:
13556 insn = bfd_get_32 (output_bfd,
13557 contents + rel->r_offset - d_offset);
13558 insn &= 31 << 21;
13559 insn |= 0x3c0d0000; /* addis 0,13,0 */
13560 bfd_put_32 (output_bfd, insn,
13561 contents + rel->r_offset - d_offset);
13562 r_type = R_PPC64_TPREL16_HA;
13563 if (toc_symndx != 0)
13564 {
13565 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
13566 rel->r_addend = toc_addend;
13567 /* We changed the symbol. Start over in order to
13568 get h, sym, sec etc. right. */
13569 goto again;
13570 }
13571 else
13572 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13573 }
13574 break;
13575
13576 case R_PPC64_TLS:
13577 if (tls_mask != 0
13578 && (tls_mask & TLS_TPREL) == 0)
13579 {
13580 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
13581 insn = _bfd_elf_ppc_at_tls_transform (insn, 13);
13582 if (insn == 0)
13583 abort ();
13584 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
13585 /* Was PPC64_TLS which sits on insn boundary, now
13586 PPC64_TPREL16_LO which is at low-order half-word. */
13587 rel->r_offset += d_offset;
13588 r_type = R_PPC64_TPREL16_LO;
13589 if (toc_symndx != 0)
13590 {
13591 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
13592 rel->r_addend = toc_addend;
13593 /* We changed the symbol. Start over in order to
13594 get h, sym, sec etc. right. */
13595 goto again;
13596 }
13597 else
13598 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13599 }
13600 break;
13601
13602 case R_PPC64_GOT_TLSGD16_HI:
13603 case R_PPC64_GOT_TLSGD16_HA:
13604 tls_gd = TLS_TPRELGD;
13605 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13606 goto tls_gdld_hi;
13607 break;
13608
13609 case R_PPC64_GOT_TLSLD16_HI:
13610 case R_PPC64_GOT_TLSLD16_HA:
13611 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13612 {
13613 tls_gdld_hi:
13614 if ((tls_mask & tls_gd) != 0)
13615 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
13616 + R_PPC64_GOT_TPREL16_DS);
13617 else
13618 {
13619 rel->r_offset -= d_offset;
13620 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
13621 r_type = R_PPC64_NONE;
13622 }
13623 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13624 }
13625 break;
13626
13627 case R_PPC64_GOT_TLSGD16:
13628 case R_PPC64_GOT_TLSGD16_LO:
13629 tls_gd = TLS_TPRELGD;
13630 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13631 goto tls_ldgd_opt;
13632 break;
13633
13634 case R_PPC64_GOT_TLSLD16:
13635 case R_PPC64_GOT_TLSLD16_LO:
13636 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13637 {
13638 unsigned int insn1, insn2, insn3;
13639 bfd_vma offset;
13640
13641 tls_ldgd_opt:
13642 offset = (bfd_vma) -1;
13643 /* If not using the newer R_PPC64_TLSGD/LD to mark
13644 __tls_get_addr calls, we must trust that the call
13645 stays with its arg setup insns, ie. that the next
13646 reloc is the __tls_get_addr call associated with
13647 the current reloc. Edit both insns. */
13648 if (input_section->has_tls_get_addr_call
13649 && rel + 1 < relend
13650 && branch_reloc_hash_match (input_bfd, rel + 1,
13651 htab->tls_get_addr,
13652 htab->tls_get_addr_fd))
13653 offset = rel[1].r_offset;
13654 /* We read the low GOT_TLS (or TOC16) insn because we
13655 need to keep the destination reg. It may be
13656 something other than the usual r3, and moved to r3
13657 before the call by intervening code. */
13658 insn1 = bfd_get_32 (output_bfd,
13659 contents + rel->r_offset - d_offset);
13660 if ((tls_mask & tls_gd) != 0)
13661 {
13662 /* IE */
13663 insn1 &= (0x1f << 21) | (0x1f << 16);
13664 insn1 |= 58 << 26; /* ld */
13665 insn2 = 0x7c636a14; /* add 3,3,13 */
13666 if (offset != (bfd_vma) -1)
13667 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13668 if ((tls_mask & TLS_EXPLICIT) == 0)
13669 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
13670 + R_PPC64_GOT_TPREL16_DS);
13671 else
13672 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
13673 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13674 }
13675 else
13676 {
13677 /* LE */
13678 insn1 &= 0x1f << 21;
13679 insn1 |= 0x3c0d0000; /* addis r,13,0 */
13680 insn2 = 0x38630000; /* addi 3,3,0 */
13681 if (tls_gd == 0)
13682 {
13683 /* Was an LD reloc. */
13684 if (toc_symndx)
13685 sec = local_sections[toc_symndx];
13686 for (r_symndx = 0;
13687 r_symndx < symtab_hdr->sh_info;
13688 r_symndx++)
13689 if (local_sections[r_symndx] == sec)
13690 break;
13691 if (r_symndx >= symtab_hdr->sh_info)
13692 r_symndx = STN_UNDEF;
13693 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
13694 if (r_symndx != STN_UNDEF)
13695 rel->r_addend -= (local_syms[r_symndx].st_value
13696 + sec->output_offset
13697 + sec->output_section->vma);
13698 }
13699 else if (toc_symndx != 0)
13700 {
13701 r_symndx = toc_symndx;
13702 rel->r_addend = toc_addend;
13703 }
13704 r_type = R_PPC64_TPREL16_HA;
13705 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13706 if (offset != (bfd_vma) -1)
13707 {
13708 rel[1].r_info = ELF64_R_INFO (r_symndx,
13709 R_PPC64_TPREL16_LO);
13710 rel[1].r_offset = offset + d_offset;
13711 rel[1].r_addend = rel->r_addend;
13712 }
13713 }
13714 bfd_put_32 (output_bfd, insn1,
13715 contents + rel->r_offset - d_offset);
13716 if (offset != (bfd_vma) -1)
13717 {
13718 insn3 = bfd_get_32 (output_bfd,
13719 contents + offset + 4);
13720 if (insn3 == NOP
13721 || insn3 == CROR_151515 || insn3 == CROR_313131)
13722 {
13723 rel[1].r_offset += 4;
13724 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
13725 insn2 = NOP;
13726 }
13727 bfd_put_32 (output_bfd, insn2, contents + offset);
13728 }
13729 if ((tls_mask & tls_gd) == 0
13730 && (tls_gd == 0 || toc_symndx != 0))
13731 {
13732 /* We changed the symbol. Start over in order
13733 to get h, sym, sec etc. right. */
13734 goto again;
13735 }
13736 }
13737 break;
13738
13739 case R_PPC64_TLSGD:
13740 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13741 {
13742 unsigned int insn2, insn3;
13743 bfd_vma offset = rel->r_offset;
13744
13745 if ((tls_mask & TLS_TPRELGD) != 0)
13746 {
13747 /* IE */
13748 r_type = R_PPC64_NONE;
13749 insn2 = 0x7c636a14; /* add 3,3,13 */
13750 }
13751 else
13752 {
13753 /* LE */
13754 if (toc_symndx != 0)
13755 {
13756 r_symndx = toc_symndx;
13757 rel->r_addend = toc_addend;
13758 }
13759 r_type = R_PPC64_TPREL16_LO;
13760 rel->r_offset = offset + d_offset;
13761 insn2 = 0x38630000; /* addi 3,3,0 */
13762 }
13763 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13764 /* Zap the reloc on the _tls_get_addr call too. */
13765 BFD_ASSERT (offset == rel[1].r_offset);
13766 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13767 insn3 = bfd_get_32 (output_bfd,
13768 contents + offset + 4);
13769 if (insn3 == NOP
13770 || insn3 == CROR_151515 || insn3 == CROR_313131)
13771 {
13772 rel->r_offset += 4;
13773 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
13774 insn2 = NOP;
13775 }
13776 bfd_put_32 (output_bfd, insn2, contents + offset);
13777 if ((tls_mask & TLS_TPRELGD) == 0 && toc_symndx != 0)
13778 goto again;
13779 }
13780 break;
13781
13782 case R_PPC64_TLSLD:
13783 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13784 {
13785 unsigned int insn2, insn3;
13786 bfd_vma offset = rel->r_offset;
13787
13788 if (toc_symndx)
13789 sec = local_sections[toc_symndx];
13790 for (r_symndx = 0;
13791 r_symndx < symtab_hdr->sh_info;
13792 r_symndx++)
13793 if (local_sections[r_symndx] == sec)
13794 break;
13795 if (r_symndx >= symtab_hdr->sh_info)
13796 r_symndx = STN_UNDEF;
13797 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
13798 if (r_symndx != STN_UNDEF)
13799 rel->r_addend -= (local_syms[r_symndx].st_value
13800 + sec->output_offset
13801 + sec->output_section->vma);
13802
13803 r_type = R_PPC64_TPREL16_LO;
13804 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13805 rel->r_offset = offset + d_offset;
13806 /* Zap the reloc on the _tls_get_addr call too. */
13807 BFD_ASSERT (offset == rel[1].r_offset);
13808 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13809 insn2 = 0x38630000; /* addi 3,3,0 */
13810 insn3 = bfd_get_32 (output_bfd,
13811 contents + offset + 4);
13812 if (insn3 == NOP
13813 || insn3 == CROR_151515 || insn3 == CROR_313131)
13814 {
13815 rel->r_offset += 4;
13816 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
13817 insn2 = NOP;
13818 }
13819 bfd_put_32 (output_bfd, insn2, contents + offset);
13820 goto again;
13821 }
13822 break;
13823
13824 case R_PPC64_DTPMOD64:
13825 if (rel + 1 < relend
13826 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
13827 && rel[1].r_offset == rel->r_offset + 8)
13828 {
13829 if ((tls_mask & TLS_GD) == 0)
13830 {
13831 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
13832 if ((tls_mask & TLS_TPRELGD) != 0)
13833 r_type = R_PPC64_TPREL64;
13834 else
13835 {
13836 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
13837 r_type = R_PPC64_NONE;
13838 }
13839 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13840 }
13841 }
13842 else
13843 {
13844 if ((tls_mask & TLS_LD) == 0)
13845 {
13846 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
13847 r_type = R_PPC64_NONE;
13848 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13849 }
13850 }
13851 break;
13852
13853 case R_PPC64_TPREL64:
13854 if ((tls_mask & TLS_TPREL) == 0)
13855 {
13856 r_type = R_PPC64_NONE;
13857 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13858 }
13859 break;
13860
13861 case R_PPC64_ENTRY:
13862 relocation = TOCstart + htab->sec_info[input_section->id].toc_off;
13863 if (!bfd_link_pic (info)
13864 && !info->traditional_format
13865 && relocation + 0x80008000 <= 0xffffffff)
13866 {
13867 unsigned int insn1, insn2;
13868
13869 insn1 = bfd_get_32 (input_bfd, contents + rel->r_offset);
13870 insn2 = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
13871 if ((insn1 & ~0xfffc) == LD_R2_0R12
13872 && insn2 == ADD_R2_R2_R12)
13873 {
13874 bfd_put_32 (output_bfd,
13875 LIS_R2 + PPC_HA (relocation),
13876 contents + rel->r_offset);
13877 bfd_put_32 (output_bfd,
13878 ADDI_R2_R2 + PPC_LO (relocation),
13879 contents + rel->r_offset + 4);
13880 }
13881 }
13882 else
13883 {
13884 relocation -= (rel->r_offset
13885 + input_section->output_offset
13886 + input_section->output_section->vma);
13887 if (relocation + 0x80008000 <= 0xffffffff)
13888 {
13889 unsigned int insn1, insn2;
13890
13891 insn1 = bfd_get_32 (input_bfd, contents + rel->r_offset);
13892 insn2 = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
13893 if ((insn1 & ~0xfffc) == LD_R2_0R12
13894 && insn2 == ADD_R2_R2_R12)
13895 {
13896 bfd_put_32 (output_bfd,
13897 ADDIS_R2_R12 + PPC_HA (relocation),
13898 contents + rel->r_offset);
13899 bfd_put_32 (output_bfd,
13900 ADDI_R2_R2 + PPC_LO (relocation),
13901 contents + rel->r_offset + 4);
13902 }
13903 }
13904 }
13905 break;
13906
13907 case R_PPC64_REL16_HA:
13908 /* If we are generating a non-PIC executable, edit
13909 . 0: addis 2,12,.TOC.-0b@ha
13910 . addi 2,2,.TOC.-0b@l
13911 used by ELFv2 global entry points to set up r2, to
13912 . lis 2,.TOC.@ha
13913 . addi 2,2,.TOC.@l
13914 if .TOC. is in range. */
13915 if (!bfd_link_pic (info)
13916 && !info->traditional_format
13917 && !htab->opd_abi
13918 && h != NULL && &h->elf == htab->elf.hgot
13919 && rel + 1 < relend
13920 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_REL16_LO)
13921 && rel[1].r_offset == rel->r_offset + 4
13922 && rel[1].r_addend == rel->r_addend + 4
13923 && relocation + 0x80008000 <= 0xffffffff)
13924 {
13925 unsigned int insn1, insn2;
13926 bfd_vma offset = rel->r_offset - d_offset;
13927 insn1 = bfd_get_32 (output_bfd, contents + offset);
13928 insn2 = bfd_get_32 (output_bfd, contents + offset + 4);
13929 if ((insn1 & 0xffff0000) == ADDIS_R2_R12
13930 && (insn2 & 0xffff0000) == ADDI_R2_R2)
13931 {
13932 r_type = R_PPC64_ADDR16_HA;
13933 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13934 rel->r_addend -= d_offset;
13935 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_ADDR16_LO);
13936 rel[1].r_addend -= d_offset + 4;
13937 bfd_put_32 (output_bfd, LIS_R2, contents + offset);
13938 }
13939 }
13940 break;
13941 }
13942
13943 /* Handle other relocations that tweak non-addend part of insn. */
13944 insn = 0;
13945 max_br_offset = 1 << 25;
13946 addend = rel->r_addend;
13947 reloc_dest = DEST_NORMAL;
13948 switch (r_type)
13949 {
13950 default:
13951 break;
13952
13953 case R_PPC64_TOCSAVE:
13954 if (relocation + addend == (rel->r_offset
13955 + input_section->output_offset
13956 + input_section->output_section->vma)
13957 && tocsave_find (htab, NO_INSERT,
13958 &local_syms, rel, input_bfd))
13959 {
13960 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
13961 if (insn == NOP
13962 || insn == CROR_151515 || insn == CROR_313131)
13963 bfd_put_32 (input_bfd,
13964 STD_R2_0R1 + STK_TOC (htab),
13965 contents + rel->r_offset);
13966 }
13967 break;
13968
13969 /* Branch taken prediction relocations. */
13970 case R_PPC64_ADDR14_BRTAKEN:
13971 case R_PPC64_REL14_BRTAKEN:
13972 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
13973 /* Fall thru. */
13974
13975 /* Branch not taken prediction relocations. */
13976 case R_PPC64_ADDR14_BRNTAKEN:
13977 case R_PPC64_REL14_BRNTAKEN:
13978 insn |= bfd_get_32 (output_bfd,
13979 contents + rel->r_offset) & ~(0x01 << 21);
13980 /* Fall thru. */
13981
13982 case R_PPC64_REL14:
13983 max_br_offset = 1 << 15;
13984 /* Fall thru. */
13985
13986 case R_PPC64_REL24:
13987 /* Calls to functions with a different TOC, such as calls to
13988 shared objects, need to alter the TOC pointer. This is
13989 done using a linkage stub. A REL24 branching to these
13990 linkage stubs needs to be followed by a nop, as the nop
13991 will be replaced with an instruction to restore the TOC
13992 base pointer. */
13993 fdh = h;
13994 if (h != NULL
13995 && h->oh != NULL
13996 && h->oh->is_func_descriptor)
13997 fdh = ppc_follow_link (h->oh);
13998 stub_entry = ppc_get_stub_entry (input_section, sec, fdh, &orig_rel,
13999 htab);
14000 if (stub_entry != NULL
14001 && (stub_entry->stub_type == ppc_stub_plt_call
14002 || stub_entry->stub_type == ppc_stub_plt_call_r2save
14003 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
14004 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
14005 {
14006 bfd_boolean can_plt_call = FALSE;
14007
14008 /* All of these stubs will modify r2, so there must be a
14009 branch and link followed by a nop. The nop is
14010 replaced by an insn to restore r2. */
14011 if (rel->r_offset + 8 <= input_section->size)
14012 {
14013 unsigned long br;
14014
14015 br = bfd_get_32 (input_bfd,
14016 contents + rel->r_offset);
14017 if ((br & 1) != 0)
14018 {
14019 unsigned long nop;
14020
14021 nop = bfd_get_32 (input_bfd,
14022 contents + rel->r_offset + 4);
14023 if (nop == NOP
14024 || nop == CROR_151515 || nop == CROR_313131)
14025 {
14026 if (h != NULL
14027 && (h == htab->tls_get_addr_fd
14028 || h == htab->tls_get_addr)
14029 && htab->params->tls_get_addr_opt)
14030 {
14031 /* Special stub used, leave nop alone. */
14032 }
14033 else
14034 bfd_put_32 (input_bfd,
14035 LD_R2_0R1 + STK_TOC (htab),
14036 contents + rel->r_offset + 4);
14037 can_plt_call = TRUE;
14038 }
14039 }
14040 }
14041
14042 if (!can_plt_call && h != NULL)
14043 {
14044 const char *name = h->elf.root.root.string;
14045
14046 if (*name == '.')
14047 ++name;
14048
14049 if (strncmp (name, "__libc_start_main", 17) == 0
14050 && (name[17] == 0 || name[17] == '@'))
14051 {
14052 /* Allow crt1 branch to go via a toc adjusting
14053 stub. Other calls that never return could do
14054 the same, if we could detect such. */
14055 can_plt_call = TRUE;
14056 }
14057 }
14058
14059 if (!can_plt_call)
14060 {
14061 /* g++ as of 20130507 emits self-calls without a
14062 following nop. This is arguably wrong since we
14063 have conflicting information. On the one hand a
14064 global symbol and on the other a local call
14065 sequence, but don't error for this special case.
14066 It isn't possible to cheaply verify we have
14067 exactly such a call. Allow all calls to the same
14068 section. */
14069 asection *code_sec = sec;
14070
14071 if (get_opd_info (sec) != NULL)
14072 {
14073 bfd_vma off = (relocation + addend
14074 - sec->output_section->vma
14075 - sec->output_offset);
14076
14077 opd_entry_value (sec, off, &code_sec, NULL, FALSE);
14078 }
14079 if (code_sec == input_section)
14080 can_plt_call = TRUE;
14081 }
14082
14083 if (!can_plt_call)
14084 {
14085 if (stub_entry->stub_type == ppc_stub_plt_call
14086 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14087 info->callbacks->einfo
14088 (_("%P: %H: call to `%T' lacks nop, can't restore toc; "
14089 "recompile with -fPIC\n"),
14090 input_bfd, input_section, rel->r_offset, sym_name);
14091 else
14092 info->callbacks->einfo
14093 (_("%P: %H: call to `%T' lacks nop, can't restore toc; "
14094 "(-mcmodel=small toc adjust stub)\n"),
14095 input_bfd, input_section, rel->r_offset, sym_name);
14096
14097 bfd_set_error (bfd_error_bad_value);
14098 ret = FALSE;
14099 }
14100
14101 if (can_plt_call
14102 && (stub_entry->stub_type == ppc_stub_plt_call
14103 || stub_entry->stub_type == ppc_stub_plt_call_r2save))
14104 unresolved_reloc = FALSE;
14105 }
14106
14107 if ((stub_entry == NULL
14108 || stub_entry->stub_type == ppc_stub_long_branch
14109 || stub_entry->stub_type == ppc_stub_plt_branch)
14110 && get_opd_info (sec) != NULL)
14111 {
14112 /* The branch destination is the value of the opd entry. */
14113 bfd_vma off = (relocation + addend
14114 - sec->output_section->vma
14115 - sec->output_offset);
14116 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL, FALSE);
14117 if (dest != (bfd_vma) -1)
14118 {
14119 relocation = dest;
14120 addend = 0;
14121 reloc_dest = DEST_OPD;
14122 }
14123 }
14124
14125 /* If the branch is out of reach we ought to have a long
14126 branch stub. */
14127 from = (rel->r_offset
14128 + input_section->output_offset
14129 + input_section->output_section->vma);
14130
14131 relocation += PPC64_LOCAL_ENTRY_OFFSET (fdh
14132 ? fdh->elf.other
14133 : sym->st_other);
14134
14135 if (stub_entry != NULL
14136 && (stub_entry->stub_type == ppc_stub_long_branch
14137 || stub_entry->stub_type == ppc_stub_plt_branch)
14138 && (r_type == R_PPC64_ADDR14_BRTAKEN
14139 || r_type == R_PPC64_ADDR14_BRNTAKEN
14140 || (relocation + addend - from + max_br_offset
14141 < 2 * max_br_offset)))
14142 /* Don't use the stub if this branch is in range. */
14143 stub_entry = NULL;
14144
14145 if (stub_entry != NULL)
14146 {
14147 /* Munge up the value and addend so that we call the stub
14148 rather than the procedure directly. */
14149 asection *stub_sec = stub_entry->group->stub_sec;
14150
14151 if (stub_entry->stub_type == ppc_stub_save_res)
14152 relocation += (stub_sec->output_offset
14153 + stub_sec->output_section->vma
14154 + stub_sec->size - htab->sfpr->size
14155 - htab->sfpr->output_offset
14156 - htab->sfpr->output_section->vma);
14157 else
14158 relocation = (stub_entry->stub_offset
14159 + stub_sec->output_offset
14160 + stub_sec->output_section->vma);
14161 addend = 0;
14162 reloc_dest = DEST_STUB;
14163
14164 if ((stub_entry->stub_type == ppc_stub_plt_call
14165 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14166 && (ALWAYS_EMIT_R2SAVE
14167 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14168 && rel + 1 < relend
14169 && rel[1].r_offset == rel->r_offset + 4
14170 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOCSAVE)
14171 relocation += 4;
14172 }
14173
14174 if (insn != 0)
14175 {
14176 if (is_isa_v2)
14177 {
14178 /* Set 'a' bit. This is 0b00010 in BO field for branch
14179 on CR(BI) insns (BO == 001at or 011at), and 0b01000
14180 for branch on CTR insns (BO == 1a00t or 1a01t). */
14181 if ((insn & (0x14 << 21)) == (0x04 << 21))
14182 insn |= 0x02 << 21;
14183 else if ((insn & (0x14 << 21)) == (0x10 << 21))
14184 insn |= 0x08 << 21;
14185 else
14186 break;
14187 }
14188 else
14189 {
14190 /* Invert 'y' bit if not the default. */
14191 if ((bfd_signed_vma) (relocation + addend - from) < 0)
14192 insn ^= 0x01 << 21;
14193 }
14194
14195 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
14196 }
14197
14198 /* NOP out calls to undefined weak functions.
14199 We can thus call a weak function without first
14200 checking whether the function is defined. */
14201 else if (h != NULL
14202 && h->elf.root.type == bfd_link_hash_undefweak
14203 && h->elf.dynindx == -1
14204 && r_type == R_PPC64_REL24
14205 && relocation == 0
14206 && addend == 0)
14207 {
14208 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
14209 goto copy_reloc;
14210 }
14211 break;
14212 }
14213
14214 /* Set `addend'. */
14215 tls_type = 0;
14216 switch (r_type)
14217 {
14218 default:
14219 info->callbacks->einfo
14220 (_("%P: %B: unknown relocation type %d for `%T'\n"),
14221 input_bfd, (int) r_type, sym_name);
14222
14223 bfd_set_error (bfd_error_bad_value);
14224 ret = FALSE;
14225 goto copy_reloc;
14226
14227 case R_PPC64_NONE:
14228 case R_PPC64_TLS:
14229 case R_PPC64_TLSGD:
14230 case R_PPC64_TLSLD:
14231 case R_PPC64_TOCSAVE:
14232 case R_PPC64_GNU_VTINHERIT:
14233 case R_PPC64_GNU_VTENTRY:
14234 case R_PPC64_ENTRY:
14235 goto copy_reloc;
14236
14237 /* GOT16 relocations. Like an ADDR16 using the symbol's
14238 address in the GOT as relocation value instead of the
14239 symbol's value itself. Also, create a GOT entry for the
14240 symbol and put the symbol value there. */
14241 case R_PPC64_GOT_TLSGD16:
14242 case R_PPC64_GOT_TLSGD16_LO:
14243 case R_PPC64_GOT_TLSGD16_HI:
14244 case R_PPC64_GOT_TLSGD16_HA:
14245 tls_type = TLS_TLS | TLS_GD;
14246 goto dogot;
14247
14248 case R_PPC64_GOT_TLSLD16:
14249 case R_PPC64_GOT_TLSLD16_LO:
14250 case R_PPC64_GOT_TLSLD16_HI:
14251 case R_PPC64_GOT_TLSLD16_HA:
14252 tls_type = TLS_TLS | TLS_LD;
14253 goto dogot;
14254
14255 case R_PPC64_GOT_TPREL16_DS:
14256 case R_PPC64_GOT_TPREL16_LO_DS:
14257 case R_PPC64_GOT_TPREL16_HI:
14258 case R_PPC64_GOT_TPREL16_HA:
14259 tls_type = TLS_TLS | TLS_TPREL;
14260 goto dogot;
14261
14262 case R_PPC64_GOT_DTPREL16_DS:
14263 case R_PPC64_GOT_DTPREL16_LO_DS:
14264 case R_PPC64_GOT_DTPREL16_HI:
14265 case R_PPC64_GOT_DTPREL16_HA:
14266 tls_type = TLS_TLS | TLS_DTPREL;
14267 goto dogot;
14268
14269 case R_PPC64_GOT16:
14270 case R_PPC64_GOT16_LO:
14271 case R_PPC64_GOT16_HI:
14272 case R_PPC64_GOT16_HA:
14273 case R_PPC64_GOT16_DS:
14274 case R_PPC64_GOT16_LO_DS:
14275 dogot:
14276 {
14277 /* Relocation is to the entry for this symbol in the global
14278 offset table. */
14279 asection *got;
14280 bfd_vma *offp;
14281 bfd_vma off;
14282 unsigned long indx = 0;
14283 struct got_entry *ent;
14284
14285 if (tls_type == (TLS_TLS | TLS_LD)
14286 && (h == NULL
14287 || !h->elf.def_dynamic))
14288 ent = ppc64_tlsld_got (input_bfd);
14289 else
14290 {
14291
14292 if (h != NULL)
14293 {
14294 bfd_boolean dyn = htab->elf.dynamic_sections_created;
14295 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, bfd_link_pic (info),
14296 &h->elf)
14297 || (bfd_link_pic (info)
14298 && SYMBOL_REFERENCES_LOCAL (info, &h->elf)))
14299 /* This is actually a static link, or it is a
14300 -Bsymbolic link and the symbol is defined
14301 locally, or the symbol was forced to be local
14302 because of a version file. */
14303 ;
14304 else
14305 {
14306 BFD_ASSERT (h->elf.dynindx != -1);
14307 indx = h->elf.dynindx;
14308 unresolved_reloc = FALSE;
14309 }
14310 ent = h->elf.got.glist;
14311 }
14312 else
14313 {
14314 if (local_got_ents == NULL)
14315 abort ();
14316 ent = local_got_ents[r_symndx];
14317 }
14318
14319 for (; ent != NULL; ent = ent->next)
14320 if (ent->addend == orig_rel.r_addend
14321 && ent->owner == input_bfd
14322 && ent->tls_type == tls_type)
14323 break;
14324 }
14325
14326 if (ent == NULL)
14327 abort ();
14328 if (ent->is_indirect)
14329 ent = ent->got.ent;
14330 offp = &ent->got.offset;
14331 got = ppc64_elf_tdata (ent->owner)->got;
14332 if (got == NULL)
14333 abort ();
14334
14335 /* The offset must always be a multiple of 8. We use the
14336 least significant bit to record whether we have already
14337 processed this entry. */
14338 off = *offp;
14339 if ((off & 1) != 0)
14340 off &= ~1;
14341 else
14342 {
14343 /* Generate relocs for the dynamic linker, except in
14344 the case of TLSLD where we'll use one entry per
14345 module. */
14346 asection *relgot;
14347 bfd_boolean ifunc;
14348
14349 *offp = off | 1;
14350 relgot = NULL;
14351 ifunc = (h != NULL
14352 ? h->elf.type == STT_GNU_IFUNC
14353 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC);
14354 if (ifunc)
14355 relgot = htab->elf.irelplt;
14356 else if ((bfd_link_pic (info) || indx != 0)
14357 && (h == NULL
14358 || (tls_type == (TLS_TLS | TLS_LD)
14359 && !h->elf.def_dynamic)
14360 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
14361 || h->elf.root.type != bfd_link_hash_undefweak))
14362 relgot = ppc64_elf_tdata (ent->owner)->relgot;
14363 if (relgot != NULL)
14364 {
14365 outrel.r_offset = (got->output_section->vma
14366 + got->output_offset
14367 + off);
14368 outrel.r_addend = addend;
14369 if (tls_type & (TLS_LD | TLS_GD))
14370 {
14371 outrel.r_addend = 0;
14372 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
14373 if (tls_type == (TLS_TLS | TLS_GD))
14374 {
14375 loc = relgot->contents;
14376 loc += (relgot->reloc_count++
14377 * sizeof (Elf64_External_Rela));
14378 bfd_elf64_swap_reloca_out (output_bfd,
14379 &outrel, loc);
14380 outrel.r_offset += 8;
14381 outrel.r_addend = addend;
14382 outrel.r_info
14383 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
14384 }
14385 }
14386 else if (tls_type == (TLS_TLS | TLS_DTPREL))
14387 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
14388 else if (tls_type == (TLS_TLS | TLS_TPREL))
14389 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
14390 else if (indx != 0)
14391 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
14392 else
14393 {
14394 if (ifunc)
14395 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
14396 else
14397 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
14398
14399 /* Write the .got section contents for the sake
14400 of prelink. */
14401 loc = got->contents + off;
14402 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
14403 loc);
14404 }
14405
14406 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
14407 {
14408 outrel.r_addend += relocation;
14409 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
14410 {
14411 if (htab->elf.tls_sec == NULL)
14412 outrel.r_addend = 0;
14413 else
14414 outrel.r_addend -= htab->elf.tls_sec->vma;
14415 }
14416 }
14417 loc = relgot->contents;
14418 loc += (relgot->reloc_count++
14419 * sizeof (Elf64_External_Rela));
14420 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
14421 }
14422
14423 /* Init the .got section contents here if we're not
14424 emitting a reloc. */
14425 else
14426 {
14427 relocation += addend;
14428 if (tls_type == (TLS_TLS | TLS_LD))
14429 relocation = 1;
14430 else if (tls_type != 0)
14431 {
14432 if (htab->elf.tls_sec == NULL)
14433 relocation = 0;
14434 else
14435 {
14436 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
14437 if (tls_type == (TLS_TLS | TLS_TPREL))
14438 relocation += DTP_OFFSET - TP_OFFSET;
14439 }
14440
14441 if (tls_type == (TLS_TLS | TLS_GD))
14442 {
14443 bfd_put_64 (output_bfd, relocation,
14444 got->contents + off + 8);
14445 relocation = 1;
14446 }
14447 }
14448
14449 bfd_put_64 (output_bfd, relocation,
14450 got->contents + off);
14451 }
14452 }
14453
14454 if (off >= (bfd_vma) -2)
14455 abort ();
14456
14457 relocation = got->output_section->vma + got->output_offset + off;
14458 addend = -(TOCstart + htab->sec_info[input_section->id].toc_off);
14459 }
14460 break;
14461
14462 case R_PPC64_PLT16_HA:
14463 case R_PPC64_PLT16_HI:
14464 case R_PPC64_PLT16_LO:
14465 case R_PPC64_PLT32:
14466 case R_PPC64_PLT64:
14467 /* Relocation is to the entry for this symbol in the
14468 procedure linkage table. */
14469 {
14470 struct plt_entry **plt_list = NULL;
14471 if (h != NULL)
14472 plt_list = &h->elf.plt.plist;
14473 else if (local_got_ents != NULL)
14474 {
14475 struct plt_entry **local_plt = (struct plt_entry **)
14476 (local_got_ents + symtab_hdr->sh_info);
14477 unsigned char *local_got_tls_masks = (unsigned char *)
14478 (local_plt + symtab_hdr->sh_info);
14479 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
14480 plt_list = local_plt + r_symndx;
14481 }
14482 if (plt_list)
14483 {
14484 struct plt_entry *ent;
14485
14486 for (ent = *plt_list; ent != NULL; ent = ent->next)
14487 if (ent->plt.offset != (bfd_vma) -1
14488 && ent->addend == orig_rel.r_addend)
14489 {
14490 asection *plt;
14491
14492 plt = htab->elf.splt;
14493 if (!htab->elf.dynamic_sections_created
14494 || h == NULL
14495 || h->elf.dynindx == -1)
14496 plt = htab->elf.iplt;
14497 relocation = (plt->output_section->vma
14498 + plt->output_offset
14499 + ent->plt.offset);
14500 addend = 0;
14501 unresolved_reloc = FALSE;
14502 break;
14503 }
14504 }
14505 }
14506 break;
14507
14508 case R_PPC64_TOC:
14509 /* Relocation value is TOC base. */
14510 relocation = TOCstart;
14511 if (r_symndx == STN_UNDEF)
14512 relocation += htab->sec_info[input_section->id].toc_off;
14513 else if (unresolved_reloc)
14514 ;
14515 else if (sec != NULL && sec->id < htab->sec_info_arr_size)
14516 relocation += htab->sec_info[sec->id].toc_off;
14517 else
14518 unresolved_reloc = TRUE;
14519 goto dodyn;
14520
14521 /* TOC16 relocs. We want the offset relative to the TOC base,
14522 which is the address of the start of the TOC plus 0x8000.
14523 The TOC consists of sections .got, .toc, .tocbss, and .plt,
14524 in this order. */
14525 case R_PPC64_TOC16:
14526 case R_PPC64_TOC16_LO:
14527 case R_PPC64_TOC16_HI:
14528 case R_PPC64_TOC16_DS:
14529 case R_PPC64_TOC16_LO_DS:
14530 case R_PPC64_TOC16_HA:
14531 addend -= TOCstart + htab->sec_info[input_section->id].toc_off;
14532 break;
14533
14534 /* Relocate against the beginning of the section. */
14535 case R_PPC64_SECTOFF:
14536 case R_PPC64_SECTOFF_LO:
14537 case R_PPC64_SECTOFF_HI:
14538 case R_PPC64_SECTOFF_DS:
14539 case R_PPC64_SECTOFF_LO_DS:
14540 case R_PPC64_SECTOFF_HA:
14541 if (sec != NULL)
14542 addend -= sec->output_section->vma;
14543 break;
14544
14545 case R_PPC64_REL16:
14546 case R_PPC64_REL16_LO:
14547 case R_PPC64_REL16_HI:
14548 case R_PPC64_REL16_HA:
14549 case R_PPC64_REL16DX_HA:
14550 break;
14551
14552 case R_PPC64_REL14:
14553 case R_PPC64_REL14_BRNTAKEN:
14554 case R_PPC64_REL14_BRTAKEN:
14555 case R_PPC64_REL24:
14556 break;
14557
14558 case R_PPC64_TPREL16:
14559 case R_PPC64_TPREL16_LO:
14560 case R_PPC64_TPREL16_HI:
14561 case R_PPC64_TPREL16_HA:
14562 case R_PPC64_TPREL16_DS:
14563 case R_PPC64_TPREL16_LO_DS:
14564 case R_PPC64_TPREL16_HIGH:
14565 case R_PPC64_TPREL16_HIGHA:
14566 case R_PPC64_TPREL16_HIGHER:
14567 case R_PPC64_TPREL16_HIGHERA:
14568 case R_PPC64_TPREL16_HIGHEST:
14569 case R_PPC64_TPREL16_HIGHESTA:
14570 if (h != NULL
14571 && h->elf.root.type == bfd_link_hash_undefweak
14572 && h->elf.dynindx == -1)
14573 {
14574 /* Make this relocation against an undefined weak symbol
14575 resolve to zero. This is really just a tweak, since
14576 code using weak externs ought to check that they are
14577 defined before using them. */
14578 bfd_byte *p = contents + rel->r_offset - d_offset;
14579
14580 insn = bfd_get_32 (output_bfd, p);
14581 insn = _bfd_elf_ppc_at_tprel_transform (insn, 13);
14582 if (insn != 0)
14583 bfd_put_32 (output_bfd, insn, p);
14584 break;
14585 }
14586 if (htab->elf.tls_sec != NULL)
14587 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
14588 if (bfd_link_pic (info))
14589 /* The TPREL16 relocs shouldn't really be used in shared
14590 libs as they will result in DT_TEXTREL being set, but
14591 support them anyway. */
14592 goto dodyn;
14593 break;
14594
14595 case R_PPC64_DTPREL16:
14596 case R_PPC64_DTPREL16_LO:
14597 case R_PPC64_DTPREL16_HI:
14598 case R_PPC64_DTPREL16_HA:
14599 case R_PPC64_DTPREL16_DS:
14600 case R_PPC64_DTPREL16_LO_DS:
14601 case R_PPC64_DTPREL16_HIGH:
14602 case R_PPC64_DTPREL16_HIGHA:
14603 case R_PPC64_DTPREL16_HIGHER:
14604 case R_PPC64_DTPREL16_HIGHERA:
14605 case R_PPC64_DTPREL16_HIGHEST:
14606 case R_PPC64_DTPREL16_HIGHESTA:
14607 if (htab->elf.tls_sec != NULL)
14608 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
14609 break;
14610
14611 case R_PPC64_ADDR64_LOCAL:
14612 addend += PPC64_LOCAL_ENTRY_OFFSET (h != NULL
14613 ? h->elf.other
14614 : sym->st_other);
14615 break;
14616
14617 case R_PPC64_DTPMOD64:
14618 relocation = 1;
14619 addend = 0;
14620 goto dodyn;
14621
14622 case R_PPC64_TPREL64:
14623 if (htab->elf.tls_sec != NULL)
14624 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
14625 goto dodyn;
14626
14627 case R_PPC64_DTPREL64:
14628 if (htab->elf.tls_sec != NULL)
14629 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
14630 /* Fall thru */
14631
14632 /* Relocations that may need to be propagated if this is a
14633 dynamic object. */
14634 case R_PPC64_REL30:
14635 case R_PPC64_REL32:
14636 case R_PPC64_REL64:
14637 case R_PPC64_ADDR14:
14638 case R_PPC64_ADDR14_BRNTAKEN:
14639 case R_PPC64_ADDR14_BRTAKEN:
14640 case R_PPC64_ADDR16:
14641 case R_PPC64_ADDR16_DS:
14642 case R_PPC64_ADDR16_HA:
14643 case R_PPC64_ADDR16_HI:
14644 case R_PPC64_ADDR16_HIGH:
14645 case R_PPC64_ADDR16_HIGHA:
14646 case R_PPC64_ADDR16_HIGHER:
14647 case R_PPC64_ADDR16_HIGHERA:
14648 case R_PPC64_ADDR16_HIGHEST:
14649 case R_PPC64_ADDR16_HIGHESTA:
14650 case R_PPC64_ADDR16_LO:
14651 case R_PPC64_ADDR16_LO_DS:
14652 case R_PPC64_ADDR24:
14653 case R_PPC64_ADDR32:
14654 case R_PPC64_ADDR64:
14655 case R_PPC64_UADDR16:
14656 case R_PPC64_UADDR32:
14657 case R_PPC64_UADDR64:
14658 dodyn:
14659 if ((input_section->flags & SEC_ALLOC) == 0)
14660 break;
14661
14662 if (NO_OPD_RELOCS && is_opd)
14663 break;
14664
14665 if ((bfd_link_pic (info)
14666 && (h == NULL
14667 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
14668 || h->elf.root.type != bfd_link_hash_undefweak)
14669 && (must_be_dyn_reloc (info, r_type)
14670 || !SYMBOL_CALLS_LOCAL (info, &h->elf)))
14671 || (ELIMINATE_COPY_RELOCS
14672 && !bfd_link_pic (info)
14673 && h != NULL
14674 && h->elf.dynindx != -1
14675 && !h->elf.non_got_ref
14676 && !h->elf.def_regular)
14677 || (!bfd_link_pic (info)
14678 && (h != NULL
14679 ? h->elf.type == STT_GNU_IFUNC
14680 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)))
14681 {
14682 bfd_boolean skip, relocate;
14683 asection *sreloc;
14684 bfd_vma out_off;
14685
14686 /* When generating a dynamic object, these relocations
14687 are copied into the output file to be resolved at run
14688 time. */
14689
14690 skip = FALSE;
14691 relocate = FALSE;
14692
14693 out_off = _bfd_elf_section_offset (output_bfd, info,
14694 input_section, rel->r_offset);
14695 if (out_off == (bfd_vma) -1)
14696 skip = TRUE;
14697 else if (out_off == (bfd_vma) -2)
14698 skip = TRUE, relocate = TRUE;
14699 out_off += (input_section->output_section->vma
14700 + input_section->output_offset);
14701 outrel.r_offset = out_off;
14702 outrel.r_addend = rel->r_addend;
14703
14704 /* Optimize unaligned reloc use. */
14705 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
14706 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
14707 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
14708 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
14709 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
14710 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
14711 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
14712 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
14713 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
14714
14715 if (skip)
14716 memset (&outrel, 0, sizeof outrel);
14717 else if (!SYMBOL_REFERENCES_LOCAL (info, &h->elf)
14718 && !is_opd
14719 && r_type != R_PPC64_TOC)
14720 {
14721 BFD_ASSERT (h->elf.dynindx != -1);
14722 outrel.r_info = ELF64_R_INFO (h->elf.dynindx, r_type);
14723 }
14724 else
14725 {
14726 /* This symbol is local, or marked to become local,
14727 or this is an opd section reloc which must point
14728 at a local function. */
14729 outrel.r_addend += relocation;
14730 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
14731 {
14732 if (is_opd && h != NULL)
14733 {
14734 /* Lie about opd entries. This case occurs
14735 when building shared libraries and we
14736 reference a function in another shared
14737 lib. The same thing happens for a weak
14738 definition in an application that's
14739 overridden by a strong definition in a
14740 shared lib. (I believe this is a generic
14741 bug in binutils handling of weak syms.)
14742 In these cases we won't use the opd
14743 entry in this lib. */
14744 unresolved_reloc = FALSE;
14745 }
14746 if (!is_opd
14747 && r_type == R_PPC64_ADDR64
14748 && (h != NULL
14749 ? h->elf.type == STT_GNU_IFUNC
14750 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
14751 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
14752 else
14753 {
14754 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
14755
14756 /* We need to relocate .opd contents for ld.so.
14757 Prelink also wants simple and consistent rules
14758 for relocs. This make all RELATIVE relocs have
14759 *r_offset equal to r_addend. */
14760 relocate = TRUE;
14761 }
14762 }
14763 else
14764 {
14765 long indx = 0;
14766
14767 if (h != NULL
14768 ? h->elf.type == STT_GNU_IFUNC
14769 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
14770 {
14771 info->callbacks->einfo
14772 (_("%P: %H: %s for indirect "
14773 "function `%T' unsupported\n"),
14774 input_bfd, input_section, rel->r_offset,
14775 ppc64_elf_howto_table[r_type]->name,
14776 sym_name);
14777 ret = FALSE;
14778 }
14779 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
14780 ;
14781 else if (sec == NULL || sec->owner == NULL)
14782 {
14783 bfd_set_error (bfd_error_bad_value);
14784 return FALSE;
14785 }
14786 else
14787 {
14788 asection *osec;
14789
14790 osec = sec->output_section;
14791 indx = elf_section_data (osec)->dynindx;
14792
14793 if (indx == 0)
14794 {
14795 if ((osec->flags & SEC_READONLY) == 0
14796 && htab->elf.data_index_section != NULL)
14797 osec = htab->elf.data_index_section;
14798 else
14799 osec = htab->elf.text_index_section;
14800 indx = elf_section_data (osec)->dynindx;
14801 }
14802 BFD_ASSERT (indx != 0);
14803
14804 /* We are turning this relocation into one
14805 against a section symbol, so subtract out
14806 the output section's address but not the
14807 offset of the input section in the output
14808 section. */
14809 outrel.r_addend -= osec->vma;
14810 }
14811
14812 outrel.r_info = ELF64_R_INFO (indx, r_type);
14813 }
14814 }
14815
14816 sreloc = elf_section_data (input_section)->sreloc;
14817 if (h != NULL
14818 ? h->elf.type == STT_GNU_IFUNC
14819 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
14820 sreloc = htab->elf.irelplt;
14821 if (sreloc == NULL)
14822 abort ();
14823
14824 if (sreloc->reloc_count * sizeof (Elf64_External_Rela)
14825 >= sreloc->size)
14826 abort ();
14827 loc = sreloc->contents;
14828 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
14829 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
14830
14831 /* If this reloc is against an external symbol, it will
14832 be computed at runtime, so there's no need to do
14833 anything now. However, for the sake of prelink ensure
14834 that the section contents are a known value. */
14835 if (! relocate)
14836 {
14837 unresolved_reloc = FALSE;
14838 /* The value chosen here is quite arbitrary as ld.so
14839 ignores section contents except for the special
14840 case of .opd where the contents might be accessed
14841 before relocation. Choose zero, as that won't
14842 cause reloc overflow. */
14843 relocation = 0;
14844 addend = 0;
14845 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
14846 to improve backward compatibility with older
14847 versions of ld. */
14848 if (r_type == R_PPC64_ADDR64)
14849 addend = outrel.r_addend;
14850 /* Adjust pc_relative relocs to have zero in *r_offset. */
14851 else if (ppc64_elf_howto_table[r_type]->pc_relative)
14852 addend = (input_section->output_section->vma
14853 + input_section->output_offset
14854 + rel->r_offset);
14855 }
14856 }
14857 break;
14858
14859 case R_PPC64_COPY:
14860 case R_PPC64_GLOB_DAT:
14861 case R_PPC64_JMP_SLOT:
14862 case R_PPC64_JMP_IREL:
14863 case R_PPC64_RELATIVE:
14864 /* We shouldn't ever see these dynamic relocs in relocatable
14865 files. */
14866 /* Fall through. */
14867
14868 case R_PPC64_PLTGOT16:
14869 case R_PPC64_PLTGOT16_DS:
14870 case R_PPC64_PLTGOT16_HA:
14871 case R_PPC64_PLTGOT16_HI:
14872 case R_PPC64_PLTGOT16_LO:
14873 case R_PPC64_PLTGOT16_LO_DS:
14874 case R_PPC64_PLTREL32:
14875 case R_PPC64_PLTREL64:
14876 /* These ones haven't been implemented yet. */
14877
14878 info->callbacks->einfo
14879 (_("%P: %B: %s is not supported for `%T'\n"),
14880 input_bfd,
14881 ppc64_elf_howto_table[r_type]->name, sym_name);
14882
14883 bfd_set_error (bfd_error_invalid_operation);
14884 ret = FALSE;
14885 goto copy_reloc;
14886 }
14887
14888 /* Multi-instruction sequences that access the TOC can be
14889 optimized, eg. addis ra,r2,0; addi rb,ra,x;
14890 to nop; addi rb,r2,x; */
14891 switch (r_type)
14892 {
14893 default:
14894 break;
14895
14896 case R_PPC64_GOT_TLSLD16_HI:
14897 case R_PPC64_GOT_TLSGD16_HI:
14898 case R_PPC64_GOT_TPREL16_HI:
14899 case R_PPC64_GOT_DTPREL16_HI:
14900 case R_PPC64_GOT16_HI:
14901 case R_PPC64_TOC16_HI:
14902 /* These relocs would only be useful if building up an
14903 offset to later add to r2, perhaps in an indexed
14904 addressing mode instruction. Don't try to optimize.
14905 Unfortunately, the possibility of someone building up an
14906 offset like this or even with the HA relocs, means that
14907 we need to check the high insn when optimizing the low
14908 insn. */
14909 break;
14910
14911 case R_PPC64_GOT_TLSLD16_HA:
14912 case R_PPC64_GOT_TLSGD16_HA:
14913 case R_PPC64_GOT_TPREL16_HA:
14914 case R_PPC64_GOT_DTPREL16_HA:
14915 case R_PPC64_GOT16_HA:
14916 case R_PPC64_TOC16_HA:
14917 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
14918 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
14919 {
14920 bfd_byte *p = contents + (rel->r_offset & ~3);
14921 bfd_put_32 (input_bfd, NOP, p);
14922 }
14923 break;
14924
14925 case R_PPC64_GOT_TLSLD16_LO:
14926 case R_PPC64_GOT_TLSGD16_LO:
14927 case R_PPC64_GOT_TPREL16_LO_DS:
14928 case R_PPC64_GOT_DTPREL16_LO_DS:
14929 case R_PPC64_GOT16_LO:
14930 case R_PPC64_GOT16_LO_DS:
14931 case R_PPC64_TOC16_LO:
14932 case R_PPC64_TOC16_LO_DS:
14933 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
14934 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
14935 {
14936 bfd_byte *p = contents + (rel->r_offset & ~3);
14937 insn = bfd_get_32 (input_bfd, p);
14938 if ((insn & (0x3f << 26)) == 12u << 26 /* addic */)
14939 {
14940 /* Transform addic to addi when we change reg. */
14941 insn &= ~((0x3f << 26) | (0x1f << 16));
14942 insn |= (14u << 26) | (2 << 16);
14943 }
14944 else
14945 {
14946 insn &= ~(0x1f << 16);
14947 insn |= 2 << 16;
14948 }
14949 bfd_put_32 (input_bfd, insn, p);
14950 }
14951 break;
14952 }
14953
14954 /* Do any further special processing. */
14955 howto = ppc64_elf_howto_table[(int) r_type];
14956 switch (r_type)
14957 {
14958 default:
14959 break;
14960
14961 case R_PPC64_REL16_HA:
14962 case R_PPC64_REL16DX_HA:
14963 case R_PPC64_ADDR16_HA:
14964 case R_PPC64_ADDR16_HIGHA:
14965 case R_PPC64_ADDR16_HIGHERA:
14966 case R_PPC64_ADDR16_HIGHESTA:
14967 case R_PPC64_TOC16_HA:
14968 case R_PPC64_SECTOFF_HA:
14969 case R_PPC64_TPREL16_HA:
14970 case R_PPC64_TPREL16_HIGHA:
14971 case R_PPC64_TPREL16_HIGHERA:
14972 case R_PPC64_TPREL16_HIGHESTA:
14973 case R_PPC64_DTPREL16_HA:
14974 case R_PPC64_DTPREL16_HIGHA:
14975 case R_PPC64_DTPREL16_HIGHERA:
14976 case R_PPC64_DTPREL16_HIGHESTA:
14977 /* It's just possible that this symbol is a weak symbol
14978 that's not actually defined anywhere. In that case,
14979 'sec' would be NULL, and we should leave the symbol
14980 alone (it will be set to zero elsewhere in the link). */
14981 if (sec == NULL)
14982 break;
14983 /* Fall thru */
14984
14985 case R_PPC64_GOT16_HA:
14986 case R_PPC64_PLTGOT16_HA:
14987 case R_PPC64_PLT16_HA:
14988 case R_PPC64_GOT_TLSGD16_HA:
14989 case R_PPC64_GOT_TLSLD16_HA:
14990 case R_PPC64_GOT_TPREL16_HA:
14991 case R_PPC64_GOT_DTPREL16_HA:
14992 /* Add 0x10000 if sign bit in 0:15 is set.
14993 Bits 0:15 are not used. */
14994 addend += 0x8000;
14995 break;
14996
14997 case R_PPC64_ADDR16_DS:
14998 case R_PPC64_ADDR16_LO_DS:
14999 case R_PPC64_GOT16_DS:
15000 case R_PPC64_GOT16_LO_DS:
15001 case R_PPC64_PLT16_LO_DS:
15002 case R_PPC64_SECTOFF_DS:
15003 case R_PPC64_SECTOFF_LO_DS:
15004 case R_PPC64_TOC16_DS:
15005 case R_PPC64_TOC16_LO_DS:
15006 case R_PPC64_PLTGOT16_DS:
15007 case R_PPC64_PLTGOT16_LO_DS:
15008 case R_PPC64_GOT_TPREL16_DS:
15009 case R_PPC64_GOT_TPREL16_LO_DS:
15010 case R_PPC64_GOT_DTPREL16_DS:
15011 case R_PPC64_GOT_DTPREL16_LO_DS:
15012 case R_PPC64_TPREL16_DS:
15013 case R_PPC64_TPREL16_LO_DS:
15014 case R_PPC64_DTPREL16_DS:
15015 case R_PPC64_DTPREL16_LO_DS:
15016 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
15017 mask = 3;
15018 /* If this reloc is against an lq, lxv, or stxv insn, then
15019 the value must be a multiple of 16. This is somewhat of
15020 a hack, but the "correct" way to do this by defining _DQ
15021 forms of all the _DS relocs bloats all reloc switches in
15022 this file. It doesn't make much sense to use these
15023 relocs in data, so testing the insn should be safe. */
15024 if ((insn & (0x3f << 26)) == (56u << 26)
15025 || ((insn & (0x3f << 26)) == (61u << 26) && (insn & 3) == 1))
15026 mask = 15;
15027 relocation += addend;
15028 addend = insn & (mask ^ 3);
15029 if ((relocation & mask) != 0)
15030 {
15031 relocation ^= relocation & mask;
15032 info->callbacks->einfo
15033 (_("%P: %H: error: %s not a multiple of %u\n"),
15034 input_bfd, input_section, rel->r_offset,
15035 howto->name,
15036 mask + 1);
15037 bfd_set_error (bfd_error_bad_value);
15038 ret = FALSE;
15039 goto copy_reloc;
15040 }
15041 break;
15042 }
15043
15044 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
15045 because such sections are not SEC_ALLOC and thus ld.so will
15046 not process them. */
15047 if (unresolved_reloc
15048 && !((input_section->flags & SEC_DEBUGGING) != 0
15049 && h->elf.def_dynamic)
15050 && _bfd_elf_section_offset (output_bfd, info, input_section,
15051 rel->r_offset) != (bfd_vma) -1)
15052 {
15053 info->callbacks->einfo
15054 (_("%P: %H: unresolvable %s against `%T'\n"),
15055 input_bfd, input_section, rel->r_offset,
15056 howto->name,
15057 h->elf.root.root.string);
15058 ret = FALSE;
15059 }
15060
15061 /* 16-bit fields in insns mostly have signed values, but a
15062 few insns have 16-bit unsigned values. Really, we should
15063 have different reloc types. */
15064 if (howto->complain_on_overflow != complain_overflow_dont
15065 && howto->dst_mask == 0xffff
15066 && (input_section->flags & SEC_CODE) != 0)
15067 {
15068 enum complain_overflow complain = complain_overflow_signed;
15069
15070 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
15071 if ((insn & (0x3f << 26)) == 10u << 26 /* cmpli */)
15072 complain = complain_overflow_bitfield;
15073 else if (howto->rightshift == 0
15074 ? ((insn & (0x3f << 26)) == 28u << 26 /* andi */
15075 || (insn & (0x3f << 26)) == 24u << 26 /* ori */
15076 || (insn & (0x3f << 26)) == 26u << 26 /* xori */)
15077 : ((insn & (0x3f << 26)) == 29u << 26 /* andis */
15078 || (insn & (0x3f << 26)) == 25u << 26 /* oris */
15079 || (insn & (0x3f << 26)) == 27u << 26 /* xoris */))
15080 complain = complain_overflow_unsigned;
15081 if (howto->complain_on_overflow != complain)
15082 {
15083 alt_howto = *howto;
15084 alt_howto.complain_on_overflow = complain;
15085 howto = &alt_howto;
15086 }
15087 }
15088
15089 if (r_type == R_PPC64_REL16DX_HA)
15090 {
15091 /* Split field reloc isn't handled by _bfd_final_link_relocate. */
15092 if (rel->r_offset + 4 > input_section->size)
15093 r = bfd_reloc_outofrange;
15094 else
15095 {
15096 relocation += addend;
15097 relocation -= (rel->r_offset
15098 + input_section->output_offset
15099 + input_section->output_section->vma);
15100 relocation = (bfd_signed_vma) relocation >> 16;
15101 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
15102 insn &= ~0x1fffc1;
15103 insn |= (relocation & 0xffc1) | ((relocation & 0x3e) << 15);
15104 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
15105 r = bfd_reloc_ok;
15106 if (relocation + 0x8000 > 0xffff)
15107 r = bfd_reloc_overflow;
15108 }
15109 }
15110 else
15111 r = _bfd_final_link_relocate (howto, input_bfd, input_section, contents,
15112 rel->r_offset, relocation, addend);
15113
15114 if (r != bfd_reloc_ok)
15115 {
15116 char *more_info = NULL;
15117 const char *reloc_name = howto->name;
15118
15119 if (reloc_dest != DEST_NORMAL)
15120 {
15121 more_info = bfd_malloc (strlen (reloc_name) + 8);
15122 if (more_info != NULL)
15123 {
15124 strcpy (more_info, reloc_name);
15125 strcat (more_info, (reloc_dest == DEST_OPD
15126 ? " (OPD)" : " (stub)"));
15127 reloc_name = more_info;
15128 }
15129 }
15130
15131 if (r == bfd_reloc_overflow)
15132 {
15133 /* On code like "if (foo) foo();" don't report overflow
15134 on a branch to zero when foo is undefined. */
15135 if (!warned
15136 && (reloc_dest == DEST_STUB
15137 || !(h != NULL
15138 && (h->elf.root.type == bfd_link_hash_undefweak
15139 || h->elf.root.type == bfd_link_hash_undefined)
15140 && is_branch_reloc (r_type))))
15141 {
15142 if (!((*info->callbacks->reloc_overflow)
15143 (info, &h->elf.root, sym_name,
15144 reloc_name, orig_rel.r_addend,
15145 input_bfd, input_section, rel->r_offset)))
15146 return FALSE;
15147 }
15148 }
15149 else
15150 {
15151 info->callbacks->einfo
15152 (_("%P: %H: %s against `%T': error %d\n"),
15153 input_bfd, input_section, rel->r_offset,
15154 reloc_name, sym_name, (int) r);
15155 ret = FALSE;
15156 }
15157 if (more_info != NULL)
15158 free (more_info);
15159 }
15160 copy_reloc:
15161 if (wrel != rel)
15162 *wrel = *rel;
15163 }
15164
15165 if (wrel != rel)
15166 {
15167 Elf_Internal_Shdr *rel_hdr;
15168 size_t deleted = rel - wrel;
15169
15170 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
15171 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
15172 if (rel_hdr->sh_size == 0)
15173 {
15174 /* It is too late to remove an empty reloc section. Leave
15175 one NONE reloc.
15176 ??? What is wrong with an empty section??? */
15177 rel_hdr->sh_size = rel_hdr->sh_entsize;
15178 deleted -= 1;
15179 }
15180 rel_hdr = _bfd_elf_single_rel_hdr (input_section);
15181 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
15182 input_section->reloc_count -= deleted;
15183 }
15184
15185 /* If we're emitting relocations, then shortly after this function
15186 returns, reloc offsets and addends for this section will be
15187 adjusted. Worse, reloc symbol indices will be for the output
15188 file rather than the input. Save a copy of the relocs for
15189 opd_entry_value. */
15190 if (is_opd && (info->emitrelocations || bfd_link_relocatable (info)))
15191 {
15192 bfd_size_type amt;
15193 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
15194 rel = bfd_alloc (input_bfd, amt);
15195 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd.relocs == NULL);
15196 ppc64_elf_tdata (input_bfd)->opd.relocs = rel;
15197 if (rel == NULL)
15198 return FALSE;
15199 memcpy (rel, relocs, amt);
15200 }
15201 return ret;
15202 }
15203
15204 /* Adjust the value of any local symbols in opd sections. */
15205
15206 static int
15207 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
15208 const char *name ATTRIBUTE_UNUSED,
15209 Elf_Internal_Sym *elfsym,
15210 asection *input_sec,
15211 struct elf_link_hash_entry *h)
15212 {
15213 struct _opd_sec_data *opd;
15214 long adjust;
15215 bfd_vma value;
15216
15217 if (h != NULL)
15218 return 1;
15219
15220 opd = get_opd_info (input_sec);
15221 if (opd == NULL || opd->adjust == NULL)
15222 return 1;
15223
15224 value = elfsym->st_value - input_sec->output_offset;
15225 if (!bfd_link_relocatable (info))
15226 value -= input_sec->output_section->vma;
15227
15228 adjust = opd->adjust[OPD_NDX (value)];
15229 if (adjust == -1)
15230 return 2;
15231
15232 elfsym->st_value += adjust;
15233 return 1;
15234 }
15235
15236 /* Finish up dynamic symbol handling. We set the contents of various
15237 dynamic sections here. */
15238
15239 static bfd_boolean
15240 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
15241 struct bfd_link_info *info,
15242 struct elf_link_hash_entry *h,
15243 Elf_Internal_Sym *sym ATTRIBUTE_UNUSED)
15244 {
15245 struct ppc_link_hash_table *htab;
15246 struct plt_entry *ent;
15247 Elf_Internal_Rela rela;
15248 bfd_byte *loc;
15249
15250 htab = ppc_hash_table (info);
15251 if (htab == NULL)
15252 return FALSE;
15253
15254 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
15255 if (ent->plt.offset != (bfd_vma) -1)
15256 {
15257 /* This symbol has an entry in the procedure linkage
15258 table. Set it up. */
15259 if (!htab->elf.dynamic_sections_created
15260 || h->dynindx == -1)
15261 {
15262 BFD_ASSERT (h->type == STT_GNU_IFUNC
15263 && h->def_regular
15264 && (h->root.type == bfd_link_hash_defined
15265 || h->root.type == bfd_link_hash_defweak));
15266 rela.r_offset = (htab->elf.iplt->output_section->vma
15267 + htab->elf.iplt->output_offset
15268 + ent->plt.offset);
15269 if (htab->opd_abi)
15270 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
15271 else
15272 rela.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
15273 rela.r_addend = (h->root.u.def.value
15274 + h->root.u.def.section->output_offset
15275 + h->root.u.def.section->output_section->vma
15276 + ent->addend);
15277 loc = (htab->elf.irelplt->contents
15278 + (htab->elf.irelplt->reloc_count++
15279 * sizeof (Elf64_External_Rela)));
15280 }
15281 else
15282 {
15283 rela.r_offset = (htab->elf.splt->output_section->vma
15284 + htab->elf.splt->output_offset
15285 + ent->plt.offset);
15286 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
15287 rela.r_addend = ent->addend;
15288 loc = (htab->elf.srelplt->contents
15289 + ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE (htab))
15290 / PLT_ENTRY_SIZE (htab) * sizeof (Elf64_External_Rela)));
15291 }
15292 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
15293
15294 if (!htab->opd_abi)
15295 {
15296 if (!h->def_regular)
15297 {
15298 /* Mark the symbol as undefined, rather than as
15299 defined in glink. Leave the value if there were
15300 any relocations where pointer equality matters
15301 (this is a clue for the dynamic linker, to make
15302 function pointer comparisons work between an
15303 application and shared library), otherwise set it
15304 to zero. */
15305 sym->st_shndx = SHN_UNDEF;
15306 if (!h->pointer_equality_needed)
15307 sym->st_value = 0;
15308 else if (!h->ref_regular_nonweak)
15309 {
15310 /* This breaks function pointer comparisons, but
15311 that is better than breaking tests for a NULL
15312 function pointer. */
15313 sym->st_value = 0;
15314 }
15315 }
15316 }
15317 }
15318
15319 if (h->needs_copy)
15320 {
15321 /* This symbol needs a copy reloc. Set it up. */
15322
15323 if (h->dynindx == -1
15324 || (h->root.type != bfd_link_hash_defined
15325 && h->root.type != bfd_link_hash_defweak)
15326 || htab->relbss == NULL)
15327 abort ();
15328
15329 rela.r_offset = (h->root.u.def.value
15330 + h->root.u.def.section->output_section->vma
15331 + h->root.u.def.section->output_offset);
15332 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
15333 rela.r_addend = 0;
15334 loc = htab->relbss->contents;
15335 loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela);
15336 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
15337 }
15338
15339 return TRUE;
15340 }
15341
15342 /* Used to decide how to sort relocs in an optimal manner for the
15343 dynamic linker, before writing them out. */
15344
15345 static enum elf_reloc_type_class
15346 ppc64_elf_reloc_type_class (const struct bfd_link_info *info,
15347 const asection *rel_sec,
15348 const Elf_Internal_Rela *rela)
15349 {
15350 enum elf_ppc64_reloc_type r_type;
15351 struct ppc_link_hash_table *htab = ppc_hash_table (info);
15352
15353 if (rel_sec == htab->elf.irelplt)
15354 return reloc_class_ifunc;
15355
15356 r_type = ELF64_R_TYPE (rela->r_info);
15357 switch (r_type)
15358 {
15359 case R_PPC64_RELATIVE:
15360 return reloc_class_relative;
15361 case R_PPC64_JMP_SLOT:
15362 return reloc_class_plt;
15363 case R_PPC64_COPY:
15364 return reloc_class_copy;
15365 default:
15366 return reloc_class_normal;
15367 }
15368 }
15369
15370 /* Finish up the dynamic sections. */
15371
15372 static bfd_boolean
15373 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
15374 struct bfd_link_info *info)
15375 {
15376 struct ppc_link_hash_table *htab;
15377 bfd *dynobj;
15378 asection *sdyn;
15379
15380 htab = ppc_hash_table (info);
15381 if (htab == NULL)
15382 return FALSE;
15383
15384 dynobj = htab->elf.dynobj;
15385 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
15386
15387 if (htab->elf.dynamic_sections_created)
15388 {
15389 Elf64_External_Dyn *dyncon, *dynconend;
15390
15391 if (sdyn == NULL || htab->elf.sgot == NULL)
15392 abort ();
15393
15394 dyncon = (Elf64_External_Dyn *) sdyn->contents;
15395 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
15396 for (; dyncon < dynconend; dyncon++)
15397 {
15398 Elf_Internal_Dyn dyn;
15399 asection *s;
15400
15401 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
15402
15403 switch (dyn.d_tag)
15404 {
15405 default:
15406 continue;
15407
15408 case DT_PPC64_GLINK:
15409 s = htab->glink;
15410 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15411 /* We stupidly defined DT_PPC64_GLINK to be the start
15412 of glink rather than the first entry point, which is
15413 what ld.so needs, and now have a bigger stub to
15414 support automatic multiple TOCs. */
15415 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 8 * 4;
15416 break;
15417
15418 case DT_PPC64_OPD:
15419 s = bfd_get_section_by_name (output_bfd, ".opd");
15420 if (s == NULL)
15421 continue;
15422 dyn.d_un.d_ptr = s->vma;
15423 break;
15424
15425 case DT_PPC64_OPT:
15426 if (htab->do_multi_toc && htab->multi_toc_needed)
15427 dyn.d_un.d_val |= PPC64_OPT_MULTI_TOC;
15428 break;
15429
15430 case DT_PPC64_OPDSZ:
15431 s = bfd_get_section_by_name (output_bfd, ".opd");
15432 if (s == NULL)
15433 continue;
15434 dyn.d_un.d_val = s->size;
15435 break;
15436
15437 case DT_PLTGOT:
15438 s = htab->elf.splt;
15439 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15440 break;
15441
15442 case DT_JMPREL:
15443 s = htab->elf.srelplt;
15444 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15445 break;
15446
15447 case DT_PLTRELSZ:
15448 dyn.d_un.d_val = htab->elf.srelplt->size;
15449 break;
15450
15451 case DT_RELASZ:
15452 /* Don't count procedure linkage table relocs in the
15453 overall reloc count. */
15454 s = htab->elf.srelplt;
15455 if (s == NULL)
15456 continue;
15457 dyn.d_un.d_val -= s->size;
15458 break;
15459
15460 case DT_RELA:
15461 /* We may not be using the standard ELF linker script.
15462 If .rela.plt is the first .rela section, we adjust
15463 DT_RELA to not include it. */
15464 s = htab->elf.srelplt;
15465 if (s == NULL)
15466 continue;
15467 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
15468 continue;
15469 dyn.d_un.d_ptr += s->size;
15470 break;
15471 }
15472
15473 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
15474 }
15475 }
15476
15477 if (htab->elf.sgot != NULL && htab->elf.sgot->size != 0)
15478 {
15479 /* Fill in the first entry in the global offset table.
15480 We use it to hold the link-time TOCbase. */
15481 bfd_put_64 (output_bfd,
15482 elf_gp (output_bfd) + TOC_BASE_OFF,
15483 htab->elf.sgot->contents);
15484
15485 /* Set .got entry size. */
15486 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 8;
15487 }
15488
15489 if (htab->elf.splt != NULL && htab->elf.splt->size != 0)
15490 {
15491 /* Set .plt entry size. */
15492 elf_section_data (htab->elf.splt->output_section)->this_hdr.sh_entsize
15493 = PLT_ENTRY_SIZE (htab);
15494 }
15495
15496 /* brlt is SEC_LINKER_CREATED, so we need to write out relocs for
15497 brlt ourselves if emitrelocations. */
15498 if (htab->brlt != NULL
15499 && htab->brlt->reloc_count != 0
15500 && !_bfd_elf_link_output_relocs (output_bfd,
15501 htab->brlt,
15502 elf_section_data (htab->brlt)->rela.hdr,
15503 elf_section_data (htab->brlt)->relocs,
15504 NULL))
15505 return FALSE;
15506
15507 if (htab->glink != NULL
15508 && htab->glink->reloc_count != 0
15509 && !_bfd_elf_link_output_relocs (output_bfd,
15510 htab->glink,
15511 elf_section_data (htab->glink)->rela.hdr,
15512 elf_section_data (htab->glink)->relocs,
15513 NULL))
15514 return FALSE;
15515
15516 if (htab->glink_eh_frame != NULL
15517 && htab->glink_eh_frame->size != 0)
15518 {
15519 bfd_vma val;
15520 bfd_byte *p;
15521 asection *stub_sec;
15522
15523 p = htab->glink_eh_frame->contents + sizeof (glink_eh_frame_cie);
15524 for (stub_sec = htab->params->stub_bfd->sections;
15525 stub_sec != NULL;
15526 stub_sec = stub_sec->next)
15527 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
15528 {
15529 /* FDE length. */
15530 p += 4;
15531 /* CIE pointer. */
15532 p += 4;
15533 /* Offset to stub section. */
15534 val = (stub_sec->output_section->vma
15535 + stub_sec->output_offset);
15536 val -= (htab->glink_eh_frame->output_section->vma
15537 + htab->glink_eh_frame->output_offset
15538 + (p - htab->glink_eh_frame->contents));
15539 if (val + 0x80000000 > 0xffffffff)
15540 {
15541 info->callbacks->einfo
15542 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
15543 stub_sec->name);
15544 return FALSE;
15545 }
15546 bfd_put_32 (dynobj, val, p);
15547 p += 4;
15548 /* stub section size. */
15549 p += 4;
15550 /* Augmentation. */
15551 p += 1;
15552 /* Pad. */
15553 p += 7;
15554 }
15555 if (htab->glink != NULL && htab->glink->size != 0)
15556 {
15557 /* FDE length. */
15558 p += 4;
15559 /* CIE pointer. */
15560 p += 4;
15561 /* Offset to .glink. */
15562 val = (htab->glink->output_section->vma
15563 + htab->glink->output_offset
15564 + 8);
15565 val -= (htab->glink_eh_frame->output_section->vma
15566 + htab->glink_eh_frame->output_offset
15567 + (p - htab->glink_eh_frame->contents));
15568 if (val + 0x80000000 > 0xffffffff)
15569 {
15570 info->callbacks->einfo
15571 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
15572 htab->glink->name);
15573 return FALSE;
15574 }
15575 bfd_put_32 (dynobj, val, p);
15576 p += 4;
15577 /* .glink size. */
15578 p += 4;
15579 /* Augmentation. */
15580 p += 1;
15581 /* Ops. */
15582 p += 7;
15583 }
15584
15585 if (htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME
15586 && !_bfd_elf_write_section_eh_frame (output_bfd, info,
15587 htab->glink_eh_frame,
15588 htab->glink_eh_frame->contents))
15589 return FALSE;
15590 }
15591
15592 /* We need to handle writing out multiple GOT sections ourselves,
15593 since we didn't add them to DYNOBJ. We know dynobj is the first
15594 bfd. */
15595 while ((dynobj = dynobj->link.next) != NULL)
15596 {
15597 asection *s;
15598
15599 if (!is_ppc64_elf (dynobj))
15600 continue;
15601
15602 s = ppc64_elf_tdata (dynobj)->got;
15603 if (s != NULL
15604 && s->size != 0
15605 && s->output_section != bfd_abs_section_ptr
15606 && !bfd_set_section_contents (output_bfd, s->output_section,
15607 s->contents, s->output_offset,
15608 s->size))
15609 return FALSE;
15610 s = ppc64_elf_tdata (dynobj)->relgot;
15611 if (s != NULL
15612 && s->size != 0
15613 && s->output_section != bfd_abs_section_ptr
15614 && !bfd_set_section_contents (output_bfd, s->output_section,
15615 s->contents, s->output_offset,
15616 s->size))
15617 return FALSE;
15618 }
15619
15620 return TRUE;
15621 }
15622
15623 #include "elf64-target.h"
15624
15625 /* FreeBSD support */
15626
15627 #undef TARGET_LITTLE_SYM
15628 #undef TARGET_LITTLE_NAME
15629
15630 #undef TARGET_BIG_SYM
15631 #define TARGET_BIG_SYM powerpc_elf64_fbsd_vec
15632 #undef TARGET_BIG_NAME
15633 #define TARGET_BIG_NAME "elf64-powerpc-freebsd"
15634
15635 #undef ELF_OSABI
15636 #define ELF_OSABI ELFOSABI_FREEBSD
15637
15638 #undef elf64_bed
15639 #define elf64_bed elf64_powerpc_fbsd_bed
15640
15641 #include "elf64-target.h"
15642
GDB Binutils - Deliverables
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