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[deliverable/binutils-gdb.git] / bfd / elf64-ppc.c
1 /* PowerPC64-specific support for 64-bit ELF.
2 Copyright (C) 1999-2016 Free Software Foundation, Inc.
3 Written by Linus Nordberg, Swox AB <info@swox.com>,
4 based on elf32-ppc.c by Ian Lance Taylor.
5 Largely rewritten by Alan Modra.
6
7 This file is part of BFD, the Binary File Descriptor library.
8
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
13
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
18
19 You should have received a copy of the GNU General Public License along
20 with this program; if not, write to the Free Software Foundation, Inc.,
21 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
22
23
24 /* The 64-bit PowerPC ELF ABI may be found at
25 http://www.linuxbase.org/spec/ELF/ppc64/PPC-elf64abi.txt, and
26 http://www.linuxbase.org/spec/ELF/ppc64/spec/book1.html */
27
28 #include "sysdep.h"
29 #include <stdarg.h>
30 #include "bfd.h"
31 #include "bfdlink.h"
32 #include "libbfd.h"
33 #include "elf-bfd.h"
34 #include "elf/ppc64.h"
35 #include "elf64-ppc.h"
36 #include "dwarf2.h"
37
38 static bfd_reloc_status_type ppc64_elf_ha_reloc
39 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
40 static bfd_reloc_status_type ppc64_elf_branch_reloc
41 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
42 static bfd_reloc_status_type ppc64_elf_brtaken_reloc
43 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
44 static bfd_reloc_status_type ppc64_elf_sectoff_reloc
45 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
46 static bfd_reloc_status_type ppc64_elf_sectoff_ha_reloc
47 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
48 static bfd_reloc_status_type ppc64_elf_toc_reloc
49 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
50 static bfd_reloc_status_type ppc64_elf_toc_ha_reloc
51 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
52 static bfd_reloc_status_type ppc64_elf_toc64_reloc
53 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
54 static bfd_reloc_status_type ppc64_elf_unhandled_reloc
55 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
56 static bfd_vma opd_entry_value
57 (asection *, bfd_vma, asection **, bfd_vma *, bfd_boolean);
58
59 #define TARGET_LITTLE_SYM powerpc_elf64_le_vec
60 #define TARGET_LITTLE_NAME "elf64-powerpcle"
61 #define TARGET_BIG_SYM powerpc_elf64_vec
62 #define TARGET_BIG_NAME "elf64-powerpc"
63 #define ELF_ARCH bfd_arch_powerpc
64 #define ELF_TARGET_ID PPC64_ELF_DATA
65 #define ELF_MACHINE_CODE EM_PPC64
66 #define ELF_MAXPAGESIZE 0x10000
67 #define ELF_COMMONPAGESIZE 0x10000
68 #define elf_info_to_howto ppc64_elf_info_to_howto
69
70 #define elf_backend_want_got_sym 0
71 #define elf_backend_want_plt_sym 0
72 #define elf_backend_plt_alignment 3
73 #define elf_backend_plt_not_loaded 1
74 #define elf_backend_got_header_size 8
75 #define elf_backend_can_gc_sections 1
76 #define elf_backend_can_refcount 1
77 #define elf_backend_rela_normal 1
78 #define elf_backend_default_execstack 0
79
80 #define bfd_elf64_mkobject ppc64_elf_mkobject
81 #define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup
82 #define bfd_elf64_bfd_reloc_name_lookup ppc64_elf_reloc_name_lookup
83 #define bfd_elf64_bfd_merge_private_bfd_data ppc64_elf_merge_private_bfd_data
84 #define bfd_elf64_bfd_print_private_bfd_data ppc64_elf_print_private_bfd_data
85 #define bfd_elf64_new_section_hook ppc64_elf_new_section_hook
86 #define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create
87 #define bfd_elf64_get_synthetic_symtab ppc64_elf_get_synthetic_symtab
88 #define bfd_elf64_bfd_link_just_syms ppc64_elf_link_just_syms
89
90 #define elf_backend_object_p ppc64_elf_object_p
91 #define elf_backend_grok_prstatus ppc64_elf_grok_prstatus
92 #define elf_backend_grok_psinfo ppc64_elf_grok_psinfo
93 #define elf_backend_write_core_note ppc64_elf_write_core_note
94 #define elf_backend_create_dynamic_sections ppc64_elf_create_dynamic_sections
95 #define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol
96 #define elf_backend_add_symbol_hook ppc64_elf_add_symbol_hook
97 #define elf_backend_check_directives ppc64_elf_before_check_relocs
98 #define elf_backend_notice_as_needed ppc64_elf_notice_as_needed
99 #define elf_backend_archive_symbol_lookup ppc64_elf_archive_symbol_lookup
100 #define elf_backend_check_relocs ppc64_elf_check_relocs
101 #define elf_backend_gc_keep ppc64_elf_gc_keep
102 #define elf_backend_gc_mark_dynamic_ref ppc64_elf_gc_mark_dynamic_ref
103 #define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook
104 #define elf_backend_gc_sweep_hook ppc64_elf_gc_sweep_hook
105 #define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol
106 #define elf_backend_hide_symbol ppc64_elf_hide_symbol
107 #define elf_backend_maybe_function_sym ppc64_elf_maybe_function_sym
108 #define elf_backend_always_size_sections ppc64_elf_func_desc_adjust
109 #define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections
110 #define elf_backend_hash_symbol ppc64_elf_hash_symbol
111 #define elf_backend_init_index_section _bfd_elf_init_2_index_sections
112 #define elf_backend_action_discarded ppc64_elf_action_discarded
113 #define elf_backend_relocate_section ppc64_elf_relocate_section
114 #define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol
115 #define elf_backend_reloc_type_class ppc64_elf_reloc_type_class
116 #define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections
117 #define elf_backend_link_output_symbol_hook ppc64_elf_output_symbol_hook
118 #define elf_backend_special_sections ppc64_elf_special_sections
119 #define elf_backend_merge_symbol_attribute ppc64_elf_merge_symbol_attribute
120
121 /* The name of the dynamic interpreter. This is put in the .interp
122 section. */
123 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
124
125 /* The size in bytes of an entry in the procedure linkage table. */
126 #define PLT_ENTRY_SIZE(htab) (htab->opd_abi ? 24 : 8)
127
128 /* The initial size of the plt reserved for the dynamic linker. */
129 #define PLT_INITIAL_ENTRY_SIZE(htab) (htab->opd_abi ? 24 : 16)
130
131 /* Offsets to some stack save slots. */
132 #define STK_LR 16
133 #define STK_TOC(htab) (htab->opd_abi ? 40 : 24)
134 /* This one is dodgy. ELFv2 does not have a linker word, so use the
135 CR save slot. Used only by optimised __tls_get_addr call stub,
136 relying on __tls_get_addr_opt not saving CR.. */
137 #define STK_LINKER(htab) (htab->opd_abi ? 32 : 8)
138
139 /* TOC base pointers offset from start of TOC. */
140 #define TOC_BASE_OFF 0x8000
141 /* TOC base alignment. */
142 #define TOC_BASE_ALIGN 256
143
144 /* Offset of tp and dtp pointers from start of TLS block. */
145 #define TP_OFFSET 0x7000
146 #define DTP_OFFSET 0x8000
147
148 /* .plt call stub instructions. The normal stub is like this, but
149 sometimes the .plt entry crosses a 64k boundary and we need to
150 insert an addi to adjust r11. */
151 #define STD_R2_0R1 0xf8410000 /* std %r2,0+40(%r1) */
152 #define ADDIS_R11_R2 0x3d620000 /* addis %r11,%r2,xxx@ha */
153 #define LD_R12_0R11 0xe98b0000 /* ld %r12,xxx+0@l(%r11) */
154 #define MTCTR_R12 0x7d8903a6 /* mtctr %r12 */
155 #define LD_R2_0R11 0xe84b0000 /* ld %r2,xxx+8@l(%r11) */
156 #define LD_R11_0R11 0xe96b0000 /* ld %r11,xxx+16@l(%r11) */
157 #define BCTR 0x4e800420 /* bctr */
158
159 #define ADDI_R11_R11 0x396b0000 /* addi %r11,%r11,off@l */
160 #define ADDIS_R2_R2 0x3c420000 /* addis %r2,%r2,off@ha */
161 #define ADDI_R2_R2 0x38420000 /* addi %r2,%r2,off@l */
162
163 #define XOR_R2_R12_R12 0x7d826278 /* xor %r2,%r12,%r12 */
164 #define ADD_R11_R11_R2 0x7d6b1214 /* add %r11,%r11,%r2 */
165 #define XOR_R11_R12_R12 0x7d8b6278 /* xor %r11,%r12,%r12 */
166 #define ADD_R2_R2_R11 0x7c425a14 /* add %r2,%r2,%r11 */
167 #define CMPLDI_R2_0 0x28220000 /* cmpldi %r2,0 */
168 #define BNECTR 0x4ca20420 /* bnectr+ */
169 #define BNECTR_P4 0x4ce20420 /* bnectr+ */
170
171 #define LD_R12_0R2 0xe9820000 /* ld %r12,xxx+0(%r2) */
172 #define LD_R11_0R2 0xe9620000 /* ld %r11,xxx+0(%r2) */
173 #define LD_R2_0R2 0xe8420000 /* ld %r2,xxx+0(%r2) */
174
175 #define LD_R2_0R1 0xe8410000 /* ld %r2,0(%r1) */
176 #define LD_R2_0R12 0xe84c0000 /* ld %r2,0(%r12) */
177 #define ADD_R2_R2_R12 0x7c426214 /* add %r2,%r2,%r12 */
178
179 #define LIS_R2 0x3c400000 /* lis %r2,xxx@ha */
180 #define ADDIS_R2_R12 0x3c4c0000 /* addis %r2,%r12,xxx@ha */
181 #define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */
182 #define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,xxx@ha */
183 #define LD_R12_0R12 0xe98c0000 /* ld %r12,xxx@l(%r12) */
184
185 /* glink call stub instructions. We enter with the index in R0. */
186 #define GLINK_CALL_STUB_SIZE (16*4)
187 /* 0: */
188 /* .quad plt0-1f */
189 /* __glink: */
190 #define MFLR_R12 0x7d8802a6 /* mflr %12 */
191 #define BCL_20_31 0x429f0005 /* bcl 20,31,1f */
192 /* 1: */
193 #define MFLR_R11 0x7d6802a6 /* mflr %11 */
194 /* ld %2,(0b-1b)(%11) */
195 #define MTLR_R12 0x7d8803a6 /* mtlr %12 */
196 #define ADD_R11_R2_R11 0x7d625a14 /* add %11,%2,%11 */
197 /* ld %12,0(%11) */
198 /* ld %2,8(%11) */
199 /* mtctr %12 */
200 /* ld %11,16(%11) */
201 /* bctr */
202 #define MFLR_R0 0x7c0802a6 /* mflr %r0 */
203 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
204 #define SUB_R12_R12_R11 0x7d8b6050 /* subf %r12,%r11,%r12 */
205 #define ADDI_R0_R12 0x380c0000 /* addi %r0,%r12,0 */
206 #define SRDI_R0_R0_2 0x7800f082 /* rldicl %r0,%r0,62,2 */
207
208 /* Pad with this. */
209 #define NOP 0x60000000
210
211 /* Some other nops. */
212 #define CROR_151515 0x4def7b82
213 #define CROR_313131 0x4ffffb82
214
215 /* .glink entries for the first 32k functions are two instructions. */
216 #define LI_R0_0 0x38000000 /* li %r0,0 */
217 #define B_DOT 0x48000000 /* b . */
218
219 /* After that, we need two instructions to load the index, followed by
220 a branch. */
221 #define LIS_R0_0 0x3c000000 /* lis %r0,0 */
222 #define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
223
224 /* Instructions used by the save and restore reg functions. */
225 #define STD_R0_0R1 0xf8010000 /* std %r0,0(%r1) */
226 #define STD_R0_0R12 0xf80c0000 /* std %r0,0(%r12) */
227 #define LD_R0_0R1 0xe8010000 /* ld %r0,0(%r1) */
228 #define LD_R0_0R12 0xe80c0000 /* ld %r0,0(%r12) */
229 #define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
230 #define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
231 #define LI_R12_0 0x39800000 /* li %r12,0 */
232 #define STVX_VR0_R12_R0 0x7c0c01ce /* stvx %v0,%r12,%r0 */
233 #define LVX_VR0_R12_R0 0x7c0c00ce /* lvx %v0,%r12,%r0 */
234 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
235 #define BLR 0x4e800020 /* blr */
236
237 /* Since .opd is an array of descriptors and each entry will end up
238 with identical R_PPC64_RELATIVE relocs, there is really no need to
239 propagate .opd relocs; The dynamic linker should be taught to
240 relocate .opd without reloc entries. */
241 #ifndef NO_OPD_RELOCS
242 #define NO_OPD_RELOCS 0
243 #endif
244
245 #ifndef ARRAY_SIZE
246 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
247 #endif
248
249 static inline int
250 abiversion (bfd *abfd)
251 {
252 return elf_elfheader (abfd)->e_flags & EF_PPC64_ABI;
253 }
254
255 static inline void
256 set_abiversion (bfd *abfd, int ver)
257 {
258 elf_elfheader (abfd)->e_flags &= ~EF_PPC64_ABI;
259 elf_elfheader (abfd)->e_flags |= ver & EF_PPC64_ABI;
260 }
261 \f
262 #define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1)
263
264 /* Relocation HOWTO's. */
265 static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max];
266
267 static reloc_howto_type ppc64_elf_howto_raw[] = {
268 /* This reloc does nothing. */
269 HOWTO (R_PPC64_NONE, /* type */
270 0, /* rightshift */
271 3, /* size (0 = byte, 1 = short, 2 = long) */
272 0, /* bitsize */
273 FALSE, /* pc_relative */
274 0, /* bitpos */
275 complain_overflow_dont, /* complain_on_overflow */
276 bfd_elf_generic_reloc, /* special_function */
277 "R_PPC64_NONE", /* name */
278 FALSE, /* partial_inplace */
279 0, /* src_mask */
280 0, /* dst_mask */
281 FALSE), /* pcrel_offset */
282
283 /* A standard 32 bit relocation. */
284 HOWTO (R_PPC64_ADDR32, /* type */
285 0, /* rightshift */
286 2, /* size (0 = byte, 1 = short, 2 = long) */
287 32, /* bitsize */
288 FALSE, /* pc_relative */
289 0, /* bitpos */
290 complain_overflow_bitfield, /* complain_on_overflow */
291 bfd_elf_generic_reloc, /* special_function */
292 "R_PPC64_ADDR32", /* name */
293 FALSE, /* partial_inplace */
294 0, /* src_mask */
295 0xffffffff, /* dst_mask */
296 FALSE), /* pcrel_offset */
297
298 /* An absolute 26 bit branch; the lower two bits must be zero.
299 FIXME: we don't check that, we just clear them. */
300 HOWTO (R_PPC64_ADDR24, /* type */
301 0, /* rightshift */
302 2, /* size (0 = byte, 1 = short, 2 = long) */
303 26, /* bitsize */
304 FALSE, /* pc_relative */
305 0, /* bitpos */
306 complain_overflow_bitfield, /* complain_on_overflow */
307 bfd_elf_generic_reloc, /* special_function */
308 "R_PPC64_ADDR24", /* name */
309 FALSE, /* partial_inplace */
310 0, /* src_mask */
311 0x03fffffc, /* dst_mask */
312 FALSE), /* pcrel_offset */
313
314 /* A standard 16 bit relocation. */
315 HOWTO (R_PPC64_ADDR16, /* type */
316 0, /* rightshift */
317 1, /* size (0 = byte, 1 = short, 2 = long) */
318 16, /* bitsize */
319 FALSE, /* pc_relative */
320 0, /* bitpos */
321 complain_overflow_bitfield, /* complain_on_overflow */
322 bfd_elf_generic_reloc, /* special_function */
323 "R_PPC64_ADDR16", /* name */
324 FALSE, /* partial_inplace */
325 0, /* src_mask */
326 0xffff, /* dst_mask */
327 FALSE), /* pcrel_offset */
328
329 /* A 16 bit relocation without overflow. */
330 HOWTO (R_PPC64_ADDR16_LO, /* type */
331 0, /* rightshift */
332 1, /* size (0 = byte, 1 = short, 2 = long) */
333 16, /* bitsize */
334 FALSE, /* pc_relative */
335 0, /* bitpos */
336 complain_overflow_dont,/* complain_on_overflow */
337 bfd_elf_generic_reloc, /* special_function */
338 "R_PPC64_ADDR16_LO", /* name */
339 FALSE, /* partial_inplace */
340 0, /* src_mask */
341 0xffff, /* dst_mask */
342 FALSE), /* pcrel_offset */
343
344 /* Bits 16-31 of an address. */
345 HOWTO (R_PPC64_ADDR16_HI, /* type */
346 16, /* rightshift */
347 1, /* size (0 = byte, 1 = short, 2 = long) */
348 16, /* bitsize */
349 FALSE, /* pc_relative */
350 0, /* bitpos */
351 complain_overflow_signed, /* complain_on_overflow */
352 bfd_elf_generic_reloc, /* special_function */
353 "R_PPC64_ADDR16_HI", /* name */
354 FALSE, /* partial_inplace */
355 0, /* src_mask */
356 0xffff, /* dst_mask */
357 FALSE), /* pcrel_offset */
358
359 /* Bits 16-31 of an address, plus 1 if the contents of the low 16
360 bits, treated as a signed number, is negative. */
361 HOWTO (R_PPC64_ADDR16_HA, /* type */
362 16, /* rightshift */
363 1, /* size (0 = byte, 1 = short, 2 = long) */
364 16, /* bitsize */
365 FALSE, /* pc_relative */
366 0, /* bitpos */
367 complain_overflow_signed, /* complain_on_overflow */
368 ppc64_elf_ha_reloc, /* special_function */
369 "R_PPC64_ADDR16_HA", /* name */
370 FALSE, /* partial_inplace */
371 0, /* src_mask */
372 0xffff, /* dst_mask */
373 FALSE), /* pcrel_offset */
374
375 /* An absolute 16 bit branch; the lower two bits must be zero.
376 FIXME: we don't check that, we just clear them. */
377 HOWTO (R_PPC64_ADDR14, /* type */
378 0, /* rightshift */
379 2, /* size (0 = byte, 1 = short, 2 = long) */
380 16, /* bitsize */
381 FALSE, /* pc_relative */
382 0, /* bitpos */
383 complain_overflow_signed, /* complain_on_overflow */
384 ppc64_elf_branch_reloc, /* special_function */
385 "R_PPC64_ADDR14", /* name */
386 FALSE, /* partial_inplace */
387 0, /* src_mask */
388 0x0000fffc, /* dst_mask */
389 FALSE), /* pcrel_offset */
390
391 /* An absolute 16 bit branch, for which bit 10 should be set to
392 indicate that the branch is expected to be taken. The lower two
393 bits must be zero. */
394 HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */
395 0, /* rightshift */
396 2, /* size (0 = byte, 1 = short, 2 = long) */
397 16, /* bitsize */
398 FALSE, /* pc_relative */
399 0, /* bitpos */
400 complain_overflow_signed, /* complain_on_overflow */
401 ppc64_elf_brtaken_reloc, /* special_function */
402 "R_PPC64_ADDR14_BRTAKEN",/* name */
403 FALSE, /* partial_inplace */
404 0, /* src_mask */
405 0x0000fffc, /* dst_mask */
406 FALSE), /* pcrel_offset */
407
408 /* An absolute 16 bit branch, for which bit 10 should be set to
409 indicate that the branch is not expected to be taken. The lower
410 two bits must be zero. */
411 HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */
412 0, /* rightshift */
413 2, /* size (0 = byte, 1 = short, 2 = long) */
414 16, /* bitsize */
415 FALSE, /* pc_relative */
416 0, /* bitpos */
417 complain_overflow_signed, /* complain_on_overflow */
418 ppc64_elf_brtaken_reloc, /* special_function */
419 "R_PPC64_ADDR14_BRNTAKEN",/* name */
420 FALSE, /* partial_inplace */
421 0, /* src_mask */
422 0x0000fffc, /* dst_mask */
423 FALSE), /* pcrel_offset */
424
425 /* A relative 26 bit branch; the lower two bits must be zero. */
426 HOWTO (R_PPC64_REL24, /* type */
427 0, /* rightshift */
428 2, /* size (0 = byte, 1 = short, 2 = long) */
429 26, /* bitsize */
430 TRUE, /* pc_relative */
431 0, /* bitpos */
432 complain_overflow_signed, /* complain_on_overflow */
433 ppc64_elf_branch_reloc, /* special_function */
434 "R_PPC64_REL24", /* name */
435 FALSE, /* partial_inplace */
436 0, /* src_mask */
437 0x03fffffc, /* dst_mask */
438 TRUE), /* pcrel_offset */
439
440 /* A relative 16 bit branch; the lower two bits must be zero. */
441 HOWTO (R_PPC64_REL14, /* type */
442 0, /* rightshift */
443 2, /* size (0 = byte, 1 = short, 2 = long) */
444 16, /* bitsize */
445 TRUE, /* pc_relative */
446 0, /* bitpos */
447 complain_overflow_signed, /* complain_on_overflow */
448 ppc64_elf_branch_reloc, /* special_function */
449 "R_PPC64_REL14", /* name */
450 FALSE, /* partial_inplace */
451 0, /* src_mask */
452 0x0000fffc, /* dst_mask */
453 TRUE), /* pcrel_offset */
454
455 /* A relative 16 bit branch. Bit 10 should be set to indicate that
456 the branch is expected to be taken. The lower two bits must be
457 zero. */
458 HOWTO (R_PPC64_REL14_BRTAKEN, /* type */
459 0, /* rightshift */
460 2, /* size (0 = byte, 1 = short, 2 = long) */
461 16, /* bitsize */
462 TRUE, /* pc_relative */
463 0, /* bitpos */
464 complain_overflow_signed, /* complain_on_overflow */
465 ppc64_elf_brtaken_reloc, /* special_function */
466 "R_PPC64_REL14_BRTAKEN", /* name */
467 FALSE, /* partial_inplace */
468 0, /* src_mask */
469 0x0000fffc, /* dst_mask */
470 TRUE), /* pcrel_offset */
471
472 /* A relative 16 bit branch. Bit 10 should be set to indicate that
473 the branch is not expected to be taken. The lower two bits must
474 be zero. */
475 HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */
476 0, /* rightshift */
477 2, /* size (0 = byte, 1 = short, 2 = long) */
478 16, /* bitsize */
479 TRUE, /* pc_relative */
480 0, /* bitpos */
481 complain_overflow_signed, /* complain_on_overflow */
482 ppc64_elf_brtaken_reloc, /* special_function */
483 "R_PPC64_REL14_BRNTAKEN",/* name */
484 FALSE, /* partial_inplace */
485 0, /* src_mask */
486 0x0000fffc, /* dst_mask */
487 TRUE), /* pcrel_offset */
488
489 /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
490 symbol. */
491 HOWTO (R_PPC64_GOT16, /* type */
492 0, /* rightshift */
493 1, /* size (0 = byte, 1 = short, 2 = long) */
494 16, /* bitsize */
495 FALSE, /* pc_relative */
496 0, /* bitpos */
497 complain_overflow_signed, /* complain_on_overflow */
498 ppc64_elf_unhandled_reloc, /* special_function */
499 "R_PPC64_GOT16", /* name */
500 FALSE, /* partial_inplace */
501 0, /* src_mask */
502 0xffff, /* dst_mask */
503 FALSE), /* pcrel_offset */
504
505 /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
506 the symbol. */
507 HOWTO (R_PPC64_GOT16_LO, /* type */
508 0, /* rightshift */
509 1, /* size (0 = byte, 1 = short, 2 = long) */
510 16, /* bitsize */
511 FALSE, /* pc_relative */
512 0, /* bitpos */
513 complain_overflow_dont, /* complain_on_overflow */
514 ppc64_elf_unhandled_reloc, /* special_function */
515 "R_PPC64_GOT16_LO", /* name */
516 FALSE, /* partial_inplace */
517 0, /* src_mask */
518 0xffff, /* dst_mask */
519 FALSE), /* pcrel_offset */
520
521 /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
522 the symbol. */
523 HOWTO (R_PPC64_GOT16_HI, /* type */
524 16, /* rightshift */
525 1, /* size (0 = byte, 1 = short, 2 = long) */
526 16, /* bitsize */
527 FALSE, /* pc_relative */
528 0, /* bitpos */
529 complain_overflow_signed,/* complain_on_overflow */
530 ppc64_elf_unhandled_reloc, /* special_function */
531 "R_PPC64_GOT16_HI", /* name */
532 FALSE, /* partial_inplace */
533 0, /* src_mask */
534 0xffff, /* dst_mask */
535 FALSE), /* pcrel_offset */
536
537 /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
538 the symbol. */
539 HOWTO (R_PPC64_GOT16_HA, /* type */
540 16, /* rightshift */
541 1, /* size (0 = byte, 1 = short, 2 = long) */
542 16, /* bitsize */
543 FALSE, /* pc_relative */
544 0, /* bitpos */
545 complain_overflow_signed,/* complain_on_overflow */
546 ppc64_elf_unhandled_reloc, /* special_function */
547 "R_PPC64_GOT16_HA", /* name */
548 FALSE, /* partial_inplace */
549 0, /* src_mask */
550 0xffff, /* dst_mask */
551 FALSE), /* pcrel_offset */
552
553 /* This is used only by the dynamic linker. The symbol should exist
554 both in the object being run and in some shared library. The
555 dynamic linker copies the data addressed by the symbol from the
556 shared library into the object, because the object being
557 run has to have the data at some particular address. */
558 HOWTO (R_PPC64_COPY, /* type */
559 0, /* rightshift */
560 0, /* this one is variable size */
561 0, /* bitsize */
562 FALSE, /* pc_relative */
563 0, /* bitpos */
564 complain_overflow_dont, /* complain_on_overflow */
565 ppc64_elf_unhandled_reloc, /* special_function */
566 "R_PPC64_COPY", /* name */
567 FALSE, /* partial_inplace */
568 0, /* src_mask */
569 0, /* dst_mask */
570 FALSE), /* pcrel_offset */
571
572 /* Like R_PPC64_ADDR64, but used when setting global offset table
573 entries. */
574 HOWTO (R_PPC64_GLOB_DAT, /* type */
575 0, /* rightshift */
576 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
577 64, /* bitsize */
578 FALSE, /* pc_relative */
579 0, /* bitpos */
580 complain_overflow_dont, /* complain_on_overflow */
581 ppc64_elf_unhandled_reloc, /* special_function */
582 "R_PPC64_GLOB_DAT", /* name */
583 FALSE, /* partial_inplace */
584 0, /* src_mask */
585 ONES (64), /* dst_mask */
586 FALSE), /* pcrel_offset */
587
588 /* Created by the link editor. Marks a procedure linkage table
589 entry for a symbol. */
590 HOWTO (R_PPC64_JMP_SLOT, /* type */
591 0, /* rightshift */
592 0, /* size (0 = byte, 1 = short, 2 = long) */
593 0, /* bitsize */
594 FALSE, /* pc_relative */
595 0, /* bitpos */
596 complain_overflow_dont, /* complain_on_overflow */
597 ppc64_elf_unhandled_reloc, /* special_function */
598 "R_PPC64_JMP_SLOT", /* name */
599 FALSE, /* partial_inplace */
600 0, /* src_mask */
601 0, /* dst_mask */
602 FALSE), /* pcrel_offset */
603
604 /* Used only by the dynamic linker. When the object is run, this
605 doubleword64 is set to the load address of the object, plus the
606 addend. */
607 HOWTO (R_PPC64_RELATIVE, /* type */
608 0, /* rightshift */
609 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
610 64, /* bitsize */
611 FALSE, /* pc_relative */
612 0, /* bitpos */
613 complain_overflow_dont, /* complain_on_overflow */
614 bfd_elf_generic_reloc, /* special_function */
615 "R_PPC64_RELATIVE", /* name */
616 FALSE, /* partial_inplace */
617 0, /* src_mask */
618 ONES (64), /* dst_mask */
619 FALSE), /* pcrel_offset */
620
621 /* Like R_PPC64_ADDR32, but may be unaligned. */
622 HOWTO (R_PPC64_UADDR32, /* type */
623 0, /* rightshift */
624 2, /* size (0 = byte, 1 = short, 2 = long) */
625 32, /* bitsize */
626 FALSE, /* pc_relative */
627 0, /* bitpos */
628 complain_overflow_bitfield, /* complain_on_overflow */
629 bfd_elf_generic_reloc, /* special_function */
630 "R_PPC64_UADDR32", /* name */
631 FALSE, /* partial_inplace */
632 0, /* src_mask */
633 0xffffffff, /* dst_mask */
634 FALSE), /* pcrel_offset */
635
636 /* Like R_PPC64_ADDR16, but may be unaligned. */
637 HOWTO (R_PPC64_UADDR16, /* type */
638 0, /* rightshift */
639 1, /* size (0 = byte, 1 = short, 2 = long) */
640 16, /* bitsize */
641 FALSE, /* pc_relative */
642 0, /* bitpos */
643 complain_overflow_bitfield, /* complain_on_overflow */
644 bfd_elf_generic_reloc, /* special_function */
645 "R_PPC64_UADDR16", /* name */
646 FALSE, /* partial_inplace */
647 0, /* src_mask */
648 0xffff, /* dst_mask */
649 FALSE), /* pcrel_offset */
650
651 /* 32-bit PC relative. */
652 HOWTO (R_PPC64_REL32, /* type */
653 0, /* rightshift */
654 2, /* size (0 = byte, 1 = short, 2 = long) */
655 32, /* bitsize */
656 TRUE, /* pc_relative */
657 0, /* bitpos */
658 complain_overflow_signed, /* complain_on_overflow */
659 bfd_elf_generic_reloc, /* special_function */
660 "R_PPC64_REL32", /* name */
661 FALSE, /* partial_inplace */
662 0, /* src_mask */
663 0xffffffff, /* dst_mask */
664 TRUE), /* pcrel_offset */
665
666 /* 32-bit relocation to the symbol's procedure linkage table. */
667 HOWTO (R_PPC64_PLT32, /* type */
668 0, /* rightshift */
669 2, /* size (0 = byte, 1 = short, 2 = long) */
670 32, /* bitsize */
671 FALSE, /* pc_relative */
672 0, /* bitpos */
673 complain_overflow_bitfield, /* complain_on_overflow */
674 ppc64_elf_unhandled_reloc, /* special_function */
675 "R_PPC64_PLT32", /* name */
676 FALSE, /* partial_inplace */
677 0, /* src_mask */
678 0xffffffff, /* dst_mask */
679 FALSE), /* pcrel_offset */
680
681 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
682 FIXME: R_PPC64_PLTREL32 not supported. */
683 HOWTO (R_PPC64_PLTREL32, /* type */
684 0, /* rightshift */
685 2, /* size (0 = byte, 1 = short, 2 = long) */
686 32, /* bitsize */
687 TRUE, /* pc_relative */
688 0, /* bitpos */
689 complain_overflow_signed, /* complain_on_overflow */
690 ppc64_elf_unhandled_reloc, /* special_function */
691 "R_PPC64_PLTREL32", /* name */
692 FALSE, /* partial_inplace */
693 0, /* src_mask */
694 0xffffffff, /* dst_mask */
695 TRUE), /* pcrel_offset */
696
697 /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
698 the symbol. */
699 HOWTO (R_PPC64_PLT16_LO, /* type */
700 0, /* rightshift */
701 1, /* size (0 = byte, 1 = short, 2 = long) */
702 16, /* bitsize */
703 FALSE, /* pc_relative */
704 0, /* bitpos */
705 complain_overflow_dont, /* complain_on_overflow */
706 ppc64_elf_unhandled_reloc, /* special_function */
707 "R_PPC64_PLT16_LO", /* name */
708 FALSE, /* partial_inplace */
709 0, /* src_mask */
710 0xffff, /* dst_mask */
711 FALSE), /* pcrel_offset */
712
713 /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
714 the symbol. */
715 HOWTO (R_PPC64_PLT16_HI, /* type */
716 16, /* rightshift */
717 1, /* size (0 = byte, 1 = short, 2 = long) */
718 16, /* bitsize */
719 FALSE, /* pc_relative */
720 0, /* bitpos */
721 complain_overflow_signed, /* complain_on_overflow */
722 ppc64_elf_unhandled_reloc, /* special_function */
723 "R_PPC64_PLT16_HI", /* name */
724 FALSE, /* partial_inplace */
725 0, /* src_mask */
726 0xffff, /* dst_mask */
727 FALSE), /* pcrel_offset */
728
729 /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
730 the symbol. */
731 HOWTO (R_PPC64_PLT16_HA, /* type */
732 16, /* rightshift */
733 1, /* size (0 = byte, 1 = short, 2 = long) */
734 16, /* bitsize */
735 FALSE, /* pc_relative */
736 0, /* bitpos */
737 complain_overflow_signed, /* complain_on_overflow */
738 ppc64_elf_unhandled_reloc, /* special_function */
739 "R_PPC64_PLT16_HA", /* name */
740 FALSE, /* partial_inplace */
741 0, /* src_mask */
742 0xffff, /* dst_mask */
743 FALSE), /* pcrel_offset */
744
745 /* 16-bit section relative relocation. */
746 HOWTO (R_PPC64_SECTOFF, /* type */
747 0, /* rightshift */
748 1, /* size (0 = byte, 1 = short, 2 = long) */
749 16, /* bitsize */
750 FALSE, /* pc_relative */
751 0, /* bitpos */
752 complain_overflow_signed, /* complain_on_overflow */
753 ppc64_elf_sectoff_reloc, /* special_function */
754 "R_PPC64_SECTOFF", /* name */
755 FALSE, /* partial_inplace */
756 0, /* src_mask */
757 0xffff, /* dst_mask */
758 FALSE), /* pcrel_offset */
759
760 /* Like R_PPC64_SECTOFF, but no overflow warning. */
761 HOWTO (R_PPC64_SECTOFF_LO, /* type */
762 0, /* rightshift */
763 1, /* size (0 = byte, 1 = short, 2 = long) */
764 16, /* bitsize */
765 FALSE, /* pc_relative */
766 0, /* bitpos */
767 complain_overflow_dont, /* complain_on_overflow */
768 ppc64_elf_sectoff_reloc, /* special_function */
769 "R_PPC64_SECTOFF_LO", /* name */
770 FALSE, /* partial_inplace */
771 0, /* src_mask */
772 0xffff, /* dst_mask */
773 FALSE), /* pcrel_offset */
774
775 /* 16-bit upper half section relative relocation. */
776 HOWTO (R_PPC64_SECTOFF_HI, /* type */
777 16, /* rightshift */
778 1, /* size (0 = byte, 1 = short, 2 = long) */
779 16, /* bitsize */
780 FALSE, /* pc_relative */
781 0, /* bitpos */
782 complain_overflow_signed, /* complain_on_overflow */
783 ppc64_elf_sectoff_reloc, /* special_function */
784 "R_PPC64_SECTOFF_HI", /* name */
785 FALSE, /* partial_inplace */
786 0, /* src_mask */
787 0xffff, /* dst_mask */
788 FALSE), /* pcrel_offset */
789
790 /* 16-bit upper half adjusted section relative relocation. */
791 HOWTO (R_PPC64_SECTOFF_HA, /* type */
792 16, /* rightshift */
793 1, /* size (0 = byte, 1 = short, 2 = long) */
794 16, /* bitsize */
795 FALSE, /* pc_relative */
796 0, /* bitpos */
797 complain_overflow_signed, /* complain_on_overflow */
798 ppc64_elf_sectoff_ha_reloc, /* special_function */
799 "R_PPC64_SECTOFF_HA", /* name */
800 FALSE, /* partial_inplace */
801 0, /* src_mask */
802 0xffff, /* dst_mask */
803 FALSE), /* pcrel_offset */
804
805 /* Like R_PPC64_REL24 without touching the two least significant bits. */
806 HOWTO (R_PPC64_REL30, /* type */
807 2, /* rightshift */
808 2, /* size (0 = byte, 1 = short, 2 = long) */
809 30, /* bitsize */
810 TRUE, /* pc_relative */
811 0, /* bitpos */
812 complain_overflow_dont, /* complain_on_overflow */
813 bfd_elf_generic_reloc, /* special_function */
814 "R_PPC64_REL30", /* name */
815 FALSE, /* partial_inplace */
816 0, /* src_mask */
817 0xfffffffc, /* dst_mask */
818 TRUE), /* pcrel_offset */
819
820 /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
821
822 /* A standard 64-bit relocation. */
823 HOWTO (R_PPC64_ADDR64, /* type */
824 0, /* rightshift */
825 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
826 64, /* bitsize */
827 FALSE, /* pc_relative */
828 0, /* bitpos */
829 complain_overflow_dont, /* complain_on_overflow */
830 bfd_elf_generic_reloc, /* special_function */
831 "R_PPC64_ADDR64", /* name */
832 FALSE, /* partial_inplace */
833 0, /* src_mask */
834 ONES (64), /* dst_mask */
835 FALSE), /* pcrel_offset */
836
837 /* The bits 32-47 of an address. */
838 HOWTO (R_PPC64_ADDR16_HIGHER, /* type */
839 32, /* rightshift */
840 1, /* size (0 = byte, 1 = short, 2 = long) */
841 16, /* bitsize */
842 FALSE, /* pc_relative */
843 0, /* bitpos */
844 complain_overflow_dont, /* complain_on_overflow */
845 bfd_elf_generic_reloc, /* special_function */
846 "R_PPC64_ADDR16_HIGHER", /* name */
847 FALSE, /* partial_inplace */
848 0, /* src_mask */
849 0xffff, /* dst_mask */
850 FALSE), /* pcrel_offset */
851
852 /* The bits 32-47 of an address, plus 1 if the contents of the low
853 16 bits, treated as a signed number, is negative. */
854 HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */
855 32, /* rightshift */
856 1, /* size (0 = byte, 1 = short, 2 = long) */
857 16, /* bitsize */
858 FALSE, /* pc_relative */
859 0, /* bitpos */
860 complain_overflow_dont, /* complain_on_overflow */
861 ppc64_elf_ha_reloc, /* special_function */
862 "R_PPC64_ADDR16_HIGHERA", /* name */
863 FALSE, /* partial_inplace */
864 0, /* src_mask */
865 0xffff, /* dst_mask */
866 FALSE), /* pcrel_offset */
867
868 /* The bits 48-63 of an address. */
869 HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */
870 48, /* rightshift */
871 1, /* size (0 = byte, 1 = short, 2 = long) */
872 16, /* bitsize */
873 FALSE, /* pc_relative */
874 0, /* bitpos */
875 complain_overflow_dont, /* complain_on_overflow */
876 bfd_elf_generic_reloc, /* special_function */
877 "R_PPC64_ADDR16_HIGHEST", /* name */
878 FALSE, /* partial_inplace */
879 0, /* src_mask */
880 0xffff, /* dst_mask */
881 FALSE), /* pcrel_offset */
882
883 /* The bits 48-63 of an address, plus 1 if the contents of the low
884 16 bits, treated as a signed number, is negative. */
885 HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */
886 48, /* rightshift */
887 1, /* size (0 = byte, 1 = short, 2 = long) */
888 16, /* bitsize */
889 FALSE, /* pc_relative */
890 0, /* bitpos */
891 complain_overflow_dont, /* complain_on_overflow */
892 ppc64_elf_ha_reloc, /* special_function */
893 "R_PPC64_ADDR16_HIGHESTA", /* name */
894 FALSE, /* partial_inplace */
895 0, /* src_mask */
896 0xffff, /* dst_mask */
897 FALSE), /* pcrel_offset */
898
899 /* Like ADDR64, but may be unaligned. */
900 HOWTO (R_PPC64_UADDR64, /* type */
901 0, /* rightshift */
902 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
903 64, /* bitsize */
904 FALSE, /* pc_relative */
905 0, /* bitpos */
906 complain_overflow_dont, /* complain_on_overflow */
907 bfd_elf_generic_reloc, /* special_function */
908 "R_PPC64_UADDR64", /* name */
909 FALSE, /* partial_inplace */
910 0, /* src_mask */
911 ONES (64), /* dst_mask */
912 FALSE), /* pcrel_offset */
913
914 /* 64-bit relative relocation. */
915 HOWTO (R_PPC64_REL64, /* type */
916 0, /* rightshift */
917 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
918 64, /* bitsize */
919 TRUE, /* pc_relative */
920 0, /* bitpos */
921 complain_overflow_dont, /* complain_on_overflow */
922 bfd_elf_generic_reloc, /* special_function */
923 "R_PPC64_REL64", /* name */
924 FALSE, /* partial_inplace */
925 0, /* src_mask */
926 ONES (64), /* dst_mask */
927 TRUE), /* pcrel_offset */
928
929 /* 64-bit relocation to the symbol's procedure linkage table. */
930 HOWTO (R_PPC64_PLT64, /* type */
931 0, /* rightshift */
932 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
933 64, /* bitsize */
934 FALSE, /* pc_relative */
935 0, /* bitpos */
936 complain_overflow_dont, /* complain_on_overflow */
937 ppc64_elf_unhandled_reloc, /* special_function */
938 "R_PPC64_PLT64", /* name */
939 FALSE, /* partial_inplace */
940 0, /* src_mask */
941 ONES (64), /* dst_mask */
942 FALSE), /* pcrel_offset */
943
944 /* 64-bit PC relative relocation to the symbol's procedure linkage
945 table. */
946 /* FIXME: R_PPC64_PLTREL64 not supported. */
947 HOWTO (R_PPC64_PLTREL64, /* type */
948 0, /* rightshift */
949 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
950 64, /* bitsize */
951 TRUE, /* pc_relative */
952 0, /* bitpos */
953 complain_overflow_dont, /* complain_on_overflow */
954 ppc64_elf_unhandled_reloc, /* special_function */
955 "R_PPC64_PLTREL64", /* name */
956 FALSE, /* partial_inplace */
957 0, /* src_mask */
958 ONES (64), /* dst_mask */
959 TRUE), /* pcrel_offset */
960
961 /* 16 bit TOC-relative relocation. */
962
963 /* R_PPC64_TOC16 47 half16* S + A - .TOC. */
964 HOWTO (R_PPC64_TOC16, /* type */
965 0, /* rightshift */
966 1, /* size (0 = byte, 1 = short, 2 = long) */
967 16, /* bitsize */
968 FALSE, /* pc_relative */
969 0, /* bitpos */
970 complain_overflow_signed, /* complain_on_overflow */
971 ppc64_elf_toc_reloc, /* special_function */
972 "R_PPC64_TOC16", /* name */
973 FALSE, /* partial_inplace */
974 0, /* src_mask */
975 0xffff, /* dst_mask */
976 FALSE), /* pcrel_offset */
977
978 /* 16 bit TOC-relative relocation without overflow. */
979
980 /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
981 HOWTO (R_PPC64_TOC16_LO, /* type */
982 0, /* rightshift */
983 1, /* size (0 = byte, 1 = short, 2 = long) */
984 16, /* bitsize */
985 FALSE, /* pc_relative */
986 0, /* bitpos */
987 complain_overflow_dont, /* complain_on_overflow */
988 ppc64_elf_toc_reloc, /* special_function */
989 "R_PPC64_TOC16_LO", /* name */
990 FALSE, /* partial_inplace */
991 0, /* src_mask */
992 0xffff, /* dst_mask */
993 FALSE), /* pcrel_offset */
994
995 /* 16 bit TOC-relative relocation, high 16 bits. */
996
997 /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
998 HOWTO (R_PPC64_TOC16_HI, /* type */
999 16, /* rightshift */
1000 1, /* size (0 = byte, 1 = short, 2 = long) */
1001 16, /* bitsize */
1002 FALSE, /* pc_relative */
1003 0, /* bitpos */
1004 complain_overflow_signed, /* complain_on_overflow */
1005 ppc64_elf_toc_reloc, /* special_function */
1006 "R_PPC64_TOC16_HI", /* name */
1007 FALSE, /* partial_inplace */
1008 0, /* src_mask */
1009 0xffff, /* dst_mask */
1010 FALSE), /* pcrel_offset */
1011
1012 /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the
1013 contents of the low 16 bits, treated as a signed number, is
1014 negative. */
1015
1016 /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
1017 HOWTO (R_PPC64_TOC16_HA, /* type */
1018 16, /* rightshift */
1019 1, /* size (0 = byte, 1 = short, 2 = long) */
1020 16, /* bitsize */
1021 FALSE, /* pc_relative */
1022 0, /* bitpos */
1023 complain_overflow_signed, /* complain_on_overflow */
1024 ppc64_elf_toc_ha_reloc, /* special_function */
1025 "R_PPC64_TOC16_HA", /* name */
1026 FALSE, /* partial_inplace */
1027 0, /* src_mask */
1028 0xffff, /* dst_mask */
1029 FALSE), /* pcrel_offset */
1030
1031 /* 64-bit relocation; insert value of TOC base (.TOC.). */
1032
1033 /* R_PPC64_TOC 51 doubleword64 .TOC. */
1034 HOWTO (R_PPC64_TOC, /* type */
1035 0, /* rightshift */
1036 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1037 64, /* bitsize */
1038 FALSE, /* pc_relative */
1039 0, /* bitpos */
1040 complain_overflow_dont, /* complain_on_overflow */
1041 ppc64_elf_toc64_reloc, /* special_function */
1042 "R_PPC64_TOC", /* name */
1043 FALSE, /* partial_inplace */
1044 0, /* src_mask */
1045 ONES (64), /* dst_mask */
1046 FALSE), /* pcrel_offset */
1047
1048 /* Like R_PPC64_GOT16, but also informs the link editor that the
1049 value to relocate may (!) refer to a PLT entry which the link
1050 editor (a) may replace with the symbol value. If the link editor
1051 is unable to fully resolve the symbol, it may (b) create a PLT
1052 entry and store the address to the new PLT entry in the GOT.
1053 This permits lazy resolution of function symbols at run time.
1054 The link editor may also skip all of this and just (c) emit a
1055 R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
1056 /* FIXME: R_PPC64_PLTGOT16 not implemented. */
1057 HOWTO (R_PPC64_PLTGOT16, /* type */
1058 0, /* rightshift */
1059 1, /* size (0 = byte, 1 = short, 2 = long) */
1060 16, /* bitsize */
1061 FALSE, /* pc_relative */
1062 0, /* bitpos */
1063 complain_overflow_signed, /* complain_on_overflow */
1064 ppc64_elf_unhandled_reloc, /* special_function */
1065 "R_PPC64_PLTGOT16", /* name */
1066 FALSE, /* partial_inplace */
1067 0, /* src_mask */
1068 0xffff, /* dst_mask */
1069 FALSE), /* pcrel_offset */
1070
1071 /* Like R_PPC64_PLTGOT16, but without overflow. */
1072 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1073 HOWTO (R_PPC64_PLTGOT16_LO, /* type */
1074 0, /* rightshift */
1075 1, /* size (0 = byte, 1 = short, 2 = long) */
1076 16, /* bitsize */
1077 FALSE, /* pc_relative */
1078 0, /* bitpos */
1079 complain_overflow_dont, /* complain_on_overflow */
1080 ppc64_elf_unhandled_reloc, /* special_function */
1081 "R_PPC64_PLTGOT16_LO", /* name */
1082 FALSE, /* partial_inplace */
1083 0, /* src_mask */
1084 0xffff, /* dst_mask */
1085 FALSE), /* pcrel_offset */
1086
1087 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */
1088 /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */
1089 HOWTO (R_PPC64_PLTGOT16_HI, /* type */
1090 16, /* rightshift */
1091 1, /* size (0 = byte, 1 = short, 2 = long) */
1092 16, /* bitsize */
1093 FALSE, /* pc_relative */
1094 0, /* bitpos */
1095 complain_overflow_signed, /* complain_on_overflow */
1096 ppc64_elf_unhandled_reloc, /* special_function */
1097 "R_PPC64_PLTGOT16_HI", /* name */
1098 FALSE, /* partial_inplace */
1099 0, /* src_mask */
1100 0xffff, /* dst_mask */
1101 FALSE), /* pcrel_offset */
1102
1103 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus
1104 1 if the contents of the low 16 bits, treated as a signed number,
1105 is negative. */
1106 /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */
1107 HOWTO (R_PPC64_PLTGOT16_HA, /* type */
1108 16, /* rightshift */
1109 1, /* size (0 = byte, 1 = short, 2 = long) */
1110 16, /* bitsize */
1111 FALSE, /* pc_relative */
1112 0, /* bitpos */
1113 complain_overflow_signed, /* complain_on_overflow */
1114 ppc64_elf_unhandled_reloc, /* special_function */
1115 "R_PPC64_PLTGOT16_HA", /* name */
1116 FALSE, /* partial_inplace */
1117 0, /* src_mask */
1118 0xffff, /* dst_mask */
1119 FALSE), /* pcrel_offset */
1120
1121 /* Like R_PPC64_ADDR16, but for instructions with a DS field. */
1122 HOWTO (R_PPC64_ADDR16_DS, /* type */
1123 0, /* rightshift */
1124 1, /* size (0 = byte, 1 = short, 2 = long) */
1125 16, /* bitsize */
1126 FALSE, /* pc_relative */
1127 0, /* bitpos */
1128 complain_overflow_signed, /* complain_on_overflow */
1129 bfd_elf_generic_reloc, /* special_function */
1130 "R_PPC64_ADDR16_DS", /* name */
1131 FALSE, /* partial_inplace */
1132 0, /* src_mask */
1133 0xfffc, /* dst_mask */
1134 FALSE), /* pcrel_offset */
1135
1136 /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
1137 HOWTO (R_PPC64_ADDR16_LO_DS, /* type */
1138 0, /* rightshift */
1139 1, /* size (0 = byte, 1 = short, 2 = long) */
1140 16, /* bitsize */
1141 FALSE, /* pc_relative */
1142 0, /* bitpos */
1143 complain_overflow_dont,/* complain_on_overflow */
1144 bfd_elf_generic_reloc, /* special_function */
1145 "R_PPC64_ADDR16_LO_DS",/* name */
1146 FALSE, /* partial_inplace */
1147 0, /* src_mask */
1148 0xfffc, /* dst_mask */
1149 FALSE), /* pcrel_offset */
1150
1151 /* Like R_PPC64_GOT16, but for instructions with a DS field. */
1152 HOWTO (R_PPC64_GOT16_DS, /* type */
1153 0, /* rightshift */
1154 1, /* size (0 = byte, 1 = short, 2 = long) */
1155 16, /* bitsize */
1156 FALSE, /* pc_relative */
1157 0, /* bitpos */
1158 complain_overflow_signed, /* complain_on_overflow */
1159 ppc64_elf_unhandled_reloc, /* special_function */
1160 "R_PPC64_GOT16_DS", /* name */
1161 FALSE, /* partial_inplace */
1162 0, /* src_mask */
1163 0xfffc, /* dst_mask */
1164 FALSE), /* pcrel_offset */
1165
1166 /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
1167 HOWTO (R_PPC64_GOT16_LO_DS, /* type */
1168 0, /* rightshift */
1169 1, /* size (0 = byte, 1 = short, 2 = long) */
1170 16, /* bitsize */
1171 FALSE, /* pc_relative */
1172 0, /* bitpos */
1173 complain_overflow_dont, /* complain_on_overflow */
1174 ppc64_elf_unhandled_reloc, /* special_function */
1175 "R_PPC64_GOT16_LO_DS", /* name */
1176 FALSE, /* partial_inplace */
1177 0, /* src_mask */
1178 0xfffc, /* dst_mask */
1179 FALSE), /* pcrel_offset */
1180
1181 /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
1182 HOWTO (R_PPC64_PLT16_LO_DS, /* type */
1183 0, /* rightshift */
1184 1, /* size (0 = byte, 1 = short, 2 = long) */
1185 16, /* bitsize */
1186 FALSE, /* pc_relative */
1187 0, /* bitpos */
1188 complain_overflow_dont, /* complain_on_overflow */
1189 ppc64_elf_unhandled_reloc, /* special_function */
1190 "R_PPC64_PLT16_LO_DS", /* name */
1191 FALSE, /* partial_inplace */
1192 0, /* src_mask */
1193 0xfffc, /* dst_mask */
1194 FALSE), /* pcrel_offset */
1195
1196 /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
1197 HOWTO (R_PPC64_SECTOFF_DS, /* type */
1198 0, /* rightshift */
1199 1, /* size (0 = byte, 1 = short, 2 = long) */
1200 16, /* bitsize */
1201 FALSE, /* pc_relative */
1202 0, /* bitpos */
1203 complain_overflow_signed, /* complain_on_overflow */
1204 ppc64_elf_sectoff_reloc, /* special_function */
1205 "R_PPC64_SECTOFF_DS", /* name */
1206 FALSE, /* partial_inplace */
1207 0, /* src_mask */
1208 0xfffc, /* dst_mask */
1209 FALSE), /* pcrel_offset */
1210
1211 /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
1212 HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */
1213 0, /* rightshift */
1214 1, /* size (0 = byte, 1 = short, 2 = long) */
1215 16, /* bitsize */
1216 FALSE, /* pc_relative */
1217 0, /* bitpos */
1218 complain_overflow_dont, /* complain_on_overflow */
1219 ppc64_elf_sectoff_reloc, /* special_function */
1220 "R_PPC64_SECTOFF_LO_DS",/* name */
1221 FALSE, /* partial_inplace */
1222 0, /* src_mask */
1223 0xfffc, /* dst_mask */
1224 FALSE), /* pcrel_offset */
1225
1226 /* Like R_PPC64_TOC16, but for instructions with a DS field. */
1227 HOWTO (R_PPC64_TOC16_DS, /* type */
1228 0, /* rightshift */
1229 1, /* size (0 = byte, 1 = short, 2 = long) */
1230 16, /* bitsize */
1231 FALSE, /* pc_relative */
1232 0, /* bitpos */
1233 complain_overflow_signed, /* complain_on_overflow */
1234 ppc64_elf_toc_reloc, /* special_function */
1235 "R_PPC64_TOC16_DS", /* name */
1236 FALSE, /* partial_inplace */
1237 0, /* src_mask */
1238 0xfffc, /* dst_mask */
1239 FALSE), /* pcrel_offset */
1240
1241 /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
1242 HOWTO (R_PPC64_TOC16_LO_DS, /* type */
1243 0, /* rightshift */
1244 1, /* size (0 = byte, 1 = short, 2 = long) */
1245 16, /* bitsize */
1246 FALSE, /* pc_relative */
1247 0, /* bitpos */
1248 complain_overflow_dont, /* complain_on_overflow */
1249 ppc64_elf_toc_reloc, /* special_function */
1250 "R_PPC64_TOC16_LO_DS", /* name */
1251 FALSE, /* partial_inplace */
1252 0, /* src_mask */
1253 0xfffc, /* dst_mask */
1254 FALSE), /* pcrel_offset */
1255
1256 /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
1257 /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
1258 HOWTO (R_PPC64_PLTGOT16_DS, /* type */
1259 0, /* rightshift */
1260 1, /* size (0 = byte, 1 = short, 2 = long) */
1261 16, /* bitsize */
1262 FALSE, /* pc_relative */
1263 0, /* bitpos */
1264 complain_overflow_signed, /* complain_on_overflow */
1265 ppc64_elf_unhandled_reloc, /* special_function */
1266 "R_PPC64_PLTGOT16_DS", /* name */
1267 FALSE, /* partial_inplace */
1268 0, /* src_mask */
1269 0xfffc, /* dst_mask */
1270 FALSE), /* pcrel_offset */
1271
1272 /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */
1273 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1274 HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */
1275 0, /* rightshift */
1276 1, /* size (0 = byte, 1 = short, 2 = long) */
1277 16, /* bitsize */
1278 FALSE, /* pc_relative */
1279 0, /* bitpos */
1280 complain_overflow_dont, /* complain_on_overflow */
1281 ppc64_elf_unhandled_reloc, /* special_function */
1282 "R_PPC64_PLTGOT16_LO_DS",/* name */
1283 FALSE, /* partial_inplace */
1284 0, /* src_mask */
1285 0xfffc, /* dst_mask */
1286 FALSE), /* pcrel_offset */
1287
1288 /* Marker relocs for TLS. */
1289 HOWTO (R_PPC64_TLS,
1290 0, /* rightshift */
1291 2, /* size (0 = byte, 1 = short, 2 = long) */
1292 32, /* bitsize */
1293 FALSE, /* pc_relative */
1294 0, /* bitpos */
1295 complain_overflow_dont, /* complain_on_overflow */
1296 bfd_elf_generic_reloc, /* special_function */
1297 "R_PPC64_TLS", /* name */
1298 FALSE, /* partial_inplace */
1299 0, /* src_mask */
1300 0, /* dst_mask */
1301 FALSE), /* pcrel_offset */
1302
1303 HOWTO (R_PPC64_TLSGD,
1304 0, /* rightshift */
1305 2, /* size (0 = byte, 1 = short, 2 = long) */
1306 32, /* bitsize */
1307 FALSE, /* pc_relative */
1308 0, /* bitpos */
1309 complain_overflow_dont, /* complain_on_overflow */
1310 bfd_elf_generic_reloc, /* special_function */
1311 "R_PPC64_TLSGD", /* name */
1312 FALSE, /* partial_inplace */
1313 0, /* src_mask */
1314 0, /* dst_mask */
1315 FALSE), /* pcrel_offset */
1316
1317 HOWTO (R_PPC64_TLSLD,
1318 0, /* rightshift */
1319 2, /* size (0 = byte, 1 = short, 2 = long) */
1320 32, /* bitsize */
1321 FALSE, /* pc_relative */
1322 0, /* bitpos */
1323 complain_overflow_dont, /* complain_on_overflow */
1324 bfd_elf_generic_reloc, /* special_function */
1325 "R_PPC64_TLSLD", /* name */
1326 FALSE, /* partial_inplace */
1327 0, /* src_mask */
1328 0, /* dst_mask */
1329 FALSE), /* pcrel_offset */
1330
1331 HOWTO (R_PPC64_TOCSAVE,
1332 0, /* rightshift */
1333 2, /* size (0 = byte, 1 = short, 2 = long) */
1334 32, /* bitsize */
1335 FALSE, /* pc_relative */
1336 0, /* bitpos */
1337 complain_overflow_dont, /* complain_on_overflow */
1338 bfd_elf_generic_reloc, /* special_function */
1339 "R_PPC64_TOCSAVE", /* name */
1340 FALSE, /* partial_inplace */
1341 0, /* src_mask */
1342 0, /* dst_mask */
1343 FALSE), /* pcrel_offset */
1344
1345 /* Computes the load module index of the load module that contains the
1346 definition of its TLS sym. */
1347 HOWTO (R_PPC64_DTPMOD64,
1348 0, /* rightshift */
1349 4, /* size (0 = byte, 1 = short, 2 = long) */
1350 64, /* bitsize */
1351 FALSE, /* pc_relative */
1352 0, /* bitpos */
1353 complain_overflow_dont, /* complain_on_overflow */
1354 ppc64_elf_unhandled_reloc, /* special_function */
1355 "R_PPC64_DTPMOD64", /* name */
1356 FALSE, /* partial_inplace */
1357 0, /* src_mask */
1358 ONES (64), /* dst_mask */
1359 FALSE), /* pcrel_offset */
1360
1361 /* Computes a dtv-relative displacement, the difference between the value
1362 of sym+add and the base address of the thread-local storage block that
1363 contains the definition of sym, minus 0x8000. */
1364 HOWTO (R_PPC64_DTPREL64,
1365 0, /* rightshift */
1366 4, /* size (0 = byte, 1 = short, 2 = long) */
1367 64, /* bitsize */
1368 FALSE, /* pc_relative */
1369 0, /* bitpos */
1370 complain_overflow_dont, /* complain_on_overflow */
1371 ppc64_elf_unhandled_reloc, /* special_function */
1372 "R_PPC64_DTPREL64", /* name */
1373 FALSE, /* partial_inplace */
1374 0, /* src_mask */
1375 ONES (64), /* dst_mask */
1376 FALSE), /* pcrel_offset */
1377
1378 /* A 16 bit dtprel reloc. */
1379 HOWTO (R_PPC64_DTPREL16,
1380 0, /* rightshift */
1381 1, /* size (0 = byte, 1 = short, 2 = long) */
1382 16, /* bitsize */
1383 FALSE, /* pc_relative */
1384 0, /* bitpos */
1385 complain_overflow_signed, /* complain_on_overflow */
1386 ppc64_elf_unhandled_reloc, /* special_function */
1387 "R_PPC64_DTPREL16", /* name */
1388 FALSE, /* partial_inplace */
1389 0, /* src_mask */
1390 0xffff, /* dst_mask */
1391 FALSE), /* pcrel_offset */
1392
1393 /* Like DTPREL16, but no overflow. */
1394 HOWTO (R_PPC64_DTPREL16_LO,
1395 0, /* rightshift */
1396 1, /* size (0 = byte, 1 = short, 2 = long) */
1397 16, /* bitsize */
1398 FALSE, /* pc_relative */
1399 0, /* bitpos */
1400 complain_overflow_dont, /* complain_on_overflow */
1401 ppc64_elf_unhandled_reloc, /* special_function */
1402 "R_PPC64_DTPREL16_LO", /* name */
1403 FALSE, /* partial_inplace */
1404 0, /* src_mask */
1405 0xffff, /* dst_mask */
1406 FALSE), /* pcrel_offset */
1407
1408 /* Like DTPREL16_LO, but next higher group of 16 bits. */
1409 HOWTO (R_PPC64_DTPREL16_HI,
1410 16, /* rightshift */
1411 1, /* size (0 = byte, 1 = short, 2 = long) */
1412 16, /* bitsize */
1413 FALSE, /* pc_relative */
1414 0, /* bitpos */
1415 complain_overflow_signed, /* complain_on_overflow */
1416 ppc64_elf_unhandled_reloc, /* special_function */
1417 "R_PPC64_DTPREL16_HI", /* name */
1418 FALSE, /* partial_inplace */
1419 0, /* src_mask */
1420 0xffff, /* dst_mask */
1421 FALSE), /* pcrel_offset */
1422
1423 /* Like DTPREL16_HI, but adjust for low 16 bits. */
1424 HOWTO (R_PPC64_DTPREL16_HA,
1425 16, /* rightshift */
1426 1, /* size (0 = byte, 1 = short, 2 = long) */
1427 16, /* bitsize */
1428 FALSE, /* pc_relative */
1429 0, /* bitpos */
1430 complain_overflow_signed, /* complain_on_overflow */
1431 ppc64_elf_unhandled_reloc, /* special_function */
1432 "R_PPC64_DTPREL16_HA", /* name */
1433 FALSE, /* partial_inplace */
1434 0, /* src_mask */
1435 0xffff, /* dst_mask */
1436 FALSE), /* pcrel_offset */
1437
1438 /* Like DTPREL16_HI, but next higher group of 16 bits. */
1439 HOWTO (R_PPC64_DTPREL16_HIGHER,
1440 32, /* rightshift */
1441 1, /* size (0 = byte, 1 = short, 2 = long) */
1442 16, /* bitsize */
1443 FALSE, /* pc_relative */
1444 0, /* bitpos */
1445 complain_overflow_dont, /* complain_on_overflow */
1446 ppc64_elf_unhandled_reloc, /* special_function */
1447 "R_PPC64_DTPREL16_HIGHER", /* name */
1448 FALSE, /* partial_inplace */
1449 0, /* src_mask */
1450 0xffff, /* dst_mask */
1451 FALSE), /* pcrel_offset */
1452
1453 /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */
1454 HOWTO (R_PPC64_DTPREL16_HIGHERA,
1455 32, /* rightshift */
1456 1, /* size (0 = byte, 1 = short, 2 = long) */
1457 16, /* bitsize */
1458 FALSE, /* pc_relative */
1459 0, /* bitpos */
1460 complain_overflow_dont, /* complain_on_overflow */
1461 ppc64_elf_unhandled_reloc, /* special_function */
1462 "R_PPC64_DTPREL16_HIGHERA", /* name */
1463 FALSE, /* partial_inplace */
1464 0, /* src_mask */
1465 0xffff, /* dst_mask */
1466 FALSE), /* pcrel_offset */
1467
1468 /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */
1469 HOWTO (R_PPC64_DTPREL16_HIGHEST,
1470 48, /* rightshift */
1471 1, /* size (0 = byte, 1 = short, 2 = long) */
1472 16, /* bitsize */
1473 FALSE, /* pc_relative */
1474 0, /* bitpos */
1475 complain_overflow_dont, /* complain_on_overflow */
1476 ppc64_elf_unhandled_reloc, /* special_function */
1477 "R_PPC64_DTPREL16_HIGHEST", /* name */
1478 FALSE, /* partial_inplace */
1479 0, /* src_mask */
1480 0xffff, /* dst_mask */
1481 FALSE), /* pcrel_offset */
1482
1483 /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */
1484 HOWTO (R_PPC64_DTPREL16_HIGHESTA,
1485 48, /* rightshift */
1486 1, /* size (0 = byte, 1 = short, 2 = long) */
1487 16, /* bitsize */
1488 FALSE, /* pc_relative */
1489 0, /* bitpos */
1490 complain_overflow_dont, /* complain_on_overflow */
1491 ppc64_elf_unhandled_reloc, /* special_function */
1492 "R_PPC64_DTPREL16_HIGHESTA", /* name */
1493 FALSE, /* partial_inplace */
1494 0, /* src_mask */
1495 0xffff, /* dst_mask */
1496 FALSE), /* pcrel_offset */
1497
1498 /* Like DTPREL16, but for insns with a DS field. */
1499 HOWTO (R_PPC64_DTPREL16_DS,
1500 0, /* rightshift */
1501 1, /* size (0 = byte, 1 = short, 2 = long) */
1502 16, /* bitsize */
1503 FALSE, /* pc_relative */
1504 0, /* bitpos */
1505 complain_overflow_signed, /* complain_on_overflow */
1506 ppc64_elf_unhandled_reloc, /* special_function */
1507 "R_PPC64_DTPREL16_DS", /* name */
1508 FALSE, /* partial_inplace */
1509 0, /* src_mask */
1510 0xfffc, /* dst_mask */
1511 FALSE), /* pcrel_offset */
1512
1513 /* Like DTPREL16_DS, but no overflow. */
1514 HOWTO (R_PPC64_DTPREL16_LO_DS,
1515 0, /* rightshift */
1516 1, /* size (0 = byte, 1 = short, 2 = long) */
1517 16, /* bitsize */
1518 FALSE, /* pc_relative */
1519 0, /* bitpos */
1520 complain_overflow_dont, /* complain_on_overflow */
1521 ppc64_elf_unhandled_reloc, /* special_function */
1522 "R_PPC64_DTPREL16_LO_DS", /* name */
1523 FALSE, /* partial_inplace */
1524 0, /* src_mask */
1525 0xfffc, /* dst_mask */
1526 FALSE), /* pcrel_offset */
1527
1528 /* Computes a tp-relative displacement, the difference between the value of
1529 sym+add and the value of the thread pointer (r13). */
1530 HOWTO (R_PPC64_TPREL64,
1531 0, /* rightshift */
1532 4, /* size (0 = byte, 1 = short, 2 = long) */
1533 64, /* bitsize */
1534 FALSE, /* pc_relative */
1535 0, /* bitpos */
1536 complain_overflow_dont, /* complain_on_overflow */
1537 ppc64_elf_unhandled_reloc, /* special_function */
1538 "R_PPC64_TPREL64", /* name */
1539 FALSE, /* partial_inplace */
1540 0, /* src_mask */
1541 ONES (64), /* dst_mask */
1542 FALSE), /* pcrel_offset */
1543
1544 /* A 16 bit tprel reloc. */
1545 HOWTO (R_PPC64_TPREL16,
1546 0, /* rightshift */
1547 1, /* size (0 = byte, 1 = short, 2 = long) */
1548 16, /* bitsize */
1549 FALSE, /* pc_relative */
1550 0, /* bitpos */
1551 complain_overflow_signed, /* complain_on_overflow */
1552 ppc64_elf_unhandled_reloc, /* special_function */
1553 "R_PPC64_TPREL16", /* name */
1554 FALSE, /* partial_inplace */
1555 0, /* src_mask */
1556 0xffff, /* dst_mask */
1557 FALSE), /* pcrel_offset */
1558
1559 /* Like TPREL16, but no overflow. */
1560 HOWTO (R_PPC64_TPREL16_LO,
1561 0, /* rightshift */
1562 1, /* size (0 = byte, 1 = short, 2 = long) */
1563 16, /* bitsize */
1564 FALSE, /* pc_relative */
1565 0, /* bitpos */
1566 complain_overflow_dont, /* complain_on_overflow */
1567 ppc64_elf_unhandled_reloc, /* special_function */
1568 "R_PPC64_TPREL16_LO", /* name */
1569 FALSE, /* partial_inplace */
1570 0, /* src_mask */
1571 0xffff, /* dst_mask */
1572 FALSE), /* pcrel_offset */
1573
1574 /* Like TPREL16_LO, but next higher group of 16 bits. */
1575 HOWTO (R_PPC64_TPREL16_HI,
1576 16, /* rightshift */
1577 1, /* size (0 = byte, 1 = short, 2 = long) */
1578 16, /* bitsize */
1579 FALSE, /* pc_relative */
1580 0, /* bitpos */
1581 complain_overflow_signed, /* complain_on_overflow */
1582 ppc64_elf_unhandled_reloc, /* special_function */
1583 "R_PPC64_TPREL16_HI", /* name */
1584 FALSE, /* partial_inplace */
1585 0, /* src_mask */
1586 0xffff, /* dst_mask */
1587 FALSE), /* pcrel_offset */
1588
1589 /* Like TPREL16_HI, but adjust for low 16 bits. */
1590 HOWTO (R_PPC64_TPREL16_HA,
1591 16, /* rightshift */
1592 1, /* size (0 = byte, 1 = short, 2 = long) */
1593 16, /* bitsize */
1594 FALSE, /* pc_relative */
1595 0, /* bitpos */
1596 complain_overflow_signed, /* complain_on_overflow */
1597 ppc64_elf_unhandled_reloc, /* special_function */
1598 "R_PPC64_TPREL16_HA", /* name */
1599 FALSE, /* partial_inplace */
1600 0, /* src_mask */
1601 0xffff, /* dst_mask */
1602 FALSE), /* pcrel_offset */
1603
1604 /* Like TPREL16_HI, but next higher group of 16 bits. */
1605 HOWTO (R_PPC64_TPREL16_HIGHER,
1606 32, /* rightshift */
1607 1, /* size (0 = byte, 1 = short, 2 = long) */
1608 16, /* bitsize */
1609 FALSE, /* pc_relative */
1610 0, /* bitpos */
1611 complain_overflow_dont, /* complain_on_overflow */
1612 ppc64_elf_unhandled_reloc, /* special_function */
1613 "R_PPC64_TPREL16_HIGHER", /* name */
1614 FALSE, /* partial_inplace */
1615 0, /* src_mask */
1616 0xffff, /* dst_mask */
1617 FALSE), /* pcrel_offset */
1618
1619 /* Like TPREL16_HIGHER, but adjust for low 16 bits. */
1620 HOWTO (R_PPC64_TPREL16_HIGHERA,
1621 32, /* rightshift */
1622 1, /* size (0 = byte, 1 = short, 2 = long) */
1623 16, /* bitsize */
1624 FALSE, /* pc_relative */
1625 0, /* bitpos */
1626 complain_overflow_dont, /* complain_on_overflow */
1627 ppc64_elf_unhandled_reloc, /* special_function */
1628 "R_PPC64_TPREL16_HIGHERA", /* name */
1629 FALSE, /* partial_inplace */
1630 0, /* src_mask */
1631 0xffff, /* dst_mask */
1632 FALSE), /* pcrel_offset */
1633
1634 /* Like TPREL16_HIGHER, but next higher group of 16 bits. */
1635 HOWTO (R_PPC64_TPREL16_HIGHEST,
1636 48, /* rightshift */
1637 1, /* size (0 = byte, 1 = short, 2 = long) */
1638 16, /* bitsize */
1639 FALSE, /* pc_relative */
1640 0, /* bitpos */
1641 complain_overflow_dont, /* complain_on_overflow */
1642 ppc64_elf_unhandled_reloc, /* special_function */
1643 "R_PPC64_TPREL16_HIGHEST", /* name */
1644 FALSE, /* partial_inplace */
1645 0, /* src_mask */
1646 0xffff, /* dst_mask */
1647 FALSE), /* pcrel_offset */
1648
1649 /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */
1650 HOWTO (R_PPC64_TPREL16_HIGHESTA,
1651 48, /* rightshift */
1652 1, /* size (0 = byte, 1 = short, 2 = long) */
1653 16, /* bitsize */
1654 FALSE, /* pc_relative */
1655 0, /* bitpos */
1656 complain_overflow_dont, /* complain_on_overflow */
1657 ppc64_elf_unhandled_reloc, /* special_function */
1658 "R_PPC64_TPREL16_HIGHESTA", /* name */
1659 FALSE, /* partial_inplace */
1660 0, /* src_mask */
1661 0xffff, /* dst_mask */
1662 FALSE), /* pcrel_offset */
1663
1664 /* Like TPREL16, but for insns with a DS field. */
1665 HOWTO (R_PPC64_TPREL16_DS,
1666 0, /* rightshift */
1667 1, /* size (0 = byte, 1 = short, 2 = long) */
1668 16, /* bitsize */
1669 FALSE, /* pc_relative */
1670 0, /* bitpos */
1671 complain_overflow_signed, /* complain_on_overflow */
1672 ppc64_elf_unhandled_reloc, /* special_function */
1673 "R_PPC64_TPREL16_DS", /* name */
1674 FALSE, /* partial_inplace */
1675 0, /* src_mask */
1676 0xfffc, /* dst_mask */
1677 FALSE), /* pcrel_offset */
1678
1679 /* Like TPREL16_DS, but no overflow. */
1680 HOWTO (R_PPC64_TPREL16_LO_DS,
1681 0, /* rightshift */
1682 1, /* size (0 = byte, 1 = short, 2 = long) */
1683 16, /* bitsize */
1684 FALSE, /* pc_relative */
1685 0, /* bitpos */
1686 complain_overflow_dont, /* complain_on_overflow */
1687 ppc64_elf_unhandled_reloc, /* special_function */
1688 "R_PPC64_TPREL16_LO_DS", /* name */
1689 FALSE, /* partial_inplace */
1690 0, /* src_mask */
1691 0xfffc, /* dst_mask */
1692 FALSE), /* pcrel_offset */
1693
1694 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1695 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1696 to the first entry relative to the TOC base (r2). */
1697 HOWTO (R_PPC64_GOT_TLSGD16,
1698 0, /* rightshift */
1699 1, /* size (0 = byte, 1 = short, 2 = long) */
1700 16, /* bitsize */
1701 FALSE, /* pc_relative */
1702 0, /* bitpos */
1703 complain_overflow_signed, /* complain_on_overflow */
1704 ppc64_elf_unhandled_reloc, /* special_function */
1705 "R_PPC64_GOT_TLSGD16", /* name */
1706 FALSE, /* partial_inplace */
1707 0, /* src_mask */
1708 0xffff, /* dst_mask */
1709 FALSE), /* pcrel_offset */
1710
1711 /* Like GOT_TLSGD16, but no overflow. */
1712 HOWTO (R_PPC64_GOT_TLSGD16_LO,
1713 0, /* rightshift */
1714 1, /* size (0 = byte, 1 = short, 2 = long) */
1715 16, /* bitsize */
1716 FALSE, /* pc_relative */
1717 0, /* bitpos */
1718 complain_overflow_dont, /* complain_on_overflow */
1719 ppc64_elf_unhandled_reloc, /* special_function */
1720 "R_PPC64_GOT_TLSGD16_LO", /* name */
1721 FALSE, /* partial_inplace */
1722 0, /* src_mask */
1723 0xffff, /* dst_mask */
1724 FALSE), /* pcrel_offset */
1725
1726 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1727 HOWTO (R_PPC64_GOT_TLSGD16_HI,
1728 16, /* rightshift */
1729 1, /* size (0 = byte, 1 = short, 2 = long) */
1730 16, /* bitsize */
1731 FALSE, /* pc_relative */
1732 0, /* bitpos */
1733 complain_overflow_signed, /* complain_on_overflow */
1734 ppc64_elf_unhandled_reloc, /* special_function */
1735 "R_PPC64_GOT_TLSGD16_HI", /* name */
1736 FALSE, /* partial_inplace */
1737 0, /* src_mask */
1738 0xffff, /* dst_mask */
1739 FALSE), /* pcrel_offset */
1740
1741 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1742 HOWTO (R_PPC64_GOT_TLSGD16_HA,
1743 16, /* rightshift */
1744 1, /* size (0 = byte, 1 = short, 2 = long) */
1745 16, /* bitsize */
1746 FALSE, /* pc_relative */
1747 0, /* bitpos */
1748 complain_overflow_signed, /* complain_on_overflow */
1749 ppc64_elf_unhandled_reloc, /* special_function */
1750 "R_PPC64_GOT_TLSGD16_HA", /* name */
1751 FALSE, /* partial_inplace */
1752 0, /* src_mask */
1753 0xffff, /* dst_mask */
1754 FALSE), /* pcrel_offset */
1755
1756 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1757 with values (sym+add)@dtpmod and zero, and computes the offset to the
1758 first entry relative to the TOC base (r2). */
1759 HOWTO (R_PPC64_GOT_TLSLD16,
1760 0, /* rightshift */
1761 1, /* size (0 = byte, 1 = short, 2 = long) */
1762 16, /* bitsize */
1763 FALSE, /* pc_relative */
1764 0, /* bitpos */
1765 complain_overflow_signed, /* complain_on_overflow */
1766 ppc64_elf_unhandled_reloc, /* special_function */
1767 "R_PPC64_GOT_TLSLD16", /* name */
1768 FALSE, /* partial_inplace */
1769 0, /* src_mask */
1770 0xffff, /* dst_mask */
1771 FALSE), /* pcrel_offset */
1772
1773 /* Like GOT_TLSLD16, but no overflow. */
1774 HOWTO (R_PPC64_GOT_TLSLD16_LO,
1775 0, /* rightshift */
1776 1, /* size (0 = byte, 1 = short, 2 = long) */
1777 16, /* bitsize */
1778 FALSE, /* pc_relative */
1779 0, /* bitpos */
1780 complain_overflow_dont, /* complain_on_overflow */
1781 ppc64_elf_unhandled_reloc, /* special_function */
1782 "R_PPC64_GOT_TLSLD16_LO", /* name */
1783 FALSE, /* partial_inplace */
1784 0, /* src_mask */
1785 0xffff, /* dst_mask */
1786 FALSE), /* pcrel_offset */
1787
1788 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1789 HOWTO (R_PPC64_GOT_TLSLD16_HI,
1790 16, /* rightshift */
1791 1, /* size (0 = byte, 1 = short, 2 = long) */
1792 16, /* bitsize */
1793 FALSE, /* pc_relative */
1794 0, /* bitpos */
1795 complain_overflow_signed, /* complain_on_overflow */
1796 ppc64_elf_unhandled_reloc, /* special_function */
1797 "R_PPC64_GOT_TLSLD16_HI", /* name */
1798 FALSE, /* partial_inplace */
1799 0, /* src_mask */
1800 0xffff, /* dst_mask */
1801 FALSE), /* pcrel_offset */
1802
1803 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1804 HOWTO (R_PPC64_GOT_TLSLD16_HA,
1805 16, /* rightshift */
1806 1, /* size (0 = byte, 1 = short, 2 = long) */
1807 16, /* bitsize */
1808 FALSE, /* pc_relative */
1809 0, /* bitpos */
1810 complain_overflow_signed, /* complain_on_overflow */
1811 ppc64_elf_unhandled_reloc, /* special_function */
1812 "R_PPC64_GOT_TLSLD16_HA", /* name */
1813 FALSE, /* partial_inplace */
1814 0, /* src_mask */
1815 0xffff, /* dst_mask */
1816 FALSE), /* pcrel_offset */
1817
1818 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1819 the offset to the entry relative to the TOC base (r2). */
1820 HOWTO (R_PPC64_GOT_DTPREL16_DS,
1821 0, /* rightshift */
1822 1, /* size (0 = byte, 1 = short, 2 = long) */
1823 16, /* bitsize */
1824 FALSE, /* pc_relative */
1825 0, /* bitpos */
1826 complain_overflow_signed, /* complain_on_overflow */
1827 ppc64_elf_unhandled_reloc, /* special_function */
1828 "R_PPC64_GOT_DTPREL16_DS", /* name */
1829 FALSE, /* partial_inplace */
1830 0, /* src_mask */
1831 0xfffc, /* dst_mask */
1832 FALSE), /* pcrel_offset */
1833
1834 /* Like GOT_DTPREL16_DS, but no overflow. */
1835 HOWTO (R_PPC64_GOT_DTPREL16_LO_DS,
1836 0, /* rightshift */
1837 1, /* size (0 = byte, 1 = short, 2 = long) */
1838 16, /* bitsize */
1839 FALSE, /* pc_relative */
1840 0, /* bitpos */
1841 complain_overflow_dont, /* complain_on_overflow */
1842 ppc64_elf_unhandled_reloc, /* special_function */
1843 "R_PPC64_GOT_DTPREL16_LO_DS", /* name */
1844 FALSE, /* partial_inplace */
1845 0, /* src_mask */
1846 0xfffc, /* dst_mask */
1847 FALSE), /* pcrel_offset */
1848
1849 /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */
1850 HOWTO (R_PPC64_GOT_DTPREL16_HI,
1851 16, /* rightshift */
1852 1, /* size (0 = byte, 1 = short, 2 = long) */
1853 16, /* bitsize */
1854 FALSE, /* pc_relative */
1855 0, /* bitpos */
1856 complain_overflow_signed, /* complain_on_overflow */
1857 ppc64_elf_unhandled_reloc, /* special_function */
1858 "R_PPC64_GOT_DTPREL16_HI", /* name */
1859 FALSE, /* partial_inplace */
1860 0, /* src_mask */
1861 0xffff, /* dst_mask */
1862 FALSE), /* pcrel_offset */
1863
1864 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1865 HOWTO (R_PPC64_GOT_DTPREL16_HA,
1866 16, /* rightshift */
1867 1, /* size (0 = byte, 1 = short, 2 = long) */
1868 16, /* bitsize */
1869 FALSE, /* pc_relative */
1870 0, /* bitpos */
1871 complain_overflow_signed, /* complain_on_overflow */
1872 ppc64_elf_unhandled_reloc, /* special_function */
1873 "R_PPC64_GOT_DTPREL16_HA", /* name */
1874 FALSE, /* partial_inplace */
1875 0, /* src_mask */
1876 0xffff, /* dst_mask */
1877 FALSE), /* pcrel_offset */
1878
1879 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1880 offset to the entry relative to the TOC base (r2). */
1881 HOWTO (R_PPC64_GOT_TPREL16_DS,
1882 0, /* rightshift */
1883 1, /* size (0 = byte, 1 = short, 2 = long) */
1884 16, /* bitsize */
1885 FALSE, /* pc_relative */
1886 0, /* bitpos */
1887 complain_overflow_signed, /* complain_on_overflow */
1888 ppc64_elf_unhandled_reloc, /* special_function */
1889 "R_PPC64_GOT_TPREL16_DS", /* name */
1890 FALSE, /* partial_inplace */
1891 0, /* src_mask */
1892 0xfffc, /* dst_mask */
1893 FALSE), /* pcrel_offset */
1894
1895 /* Like GOT_TPREL16_DS, but no overflow. */
1896 HOWTO (R_PPC64_GOT_TPREL16_LO_DS,
1897 0, /* rightshift */
1898 1, /* size (0 = byte, 1 = short, 2 = long) */
1899 16, /* bitsize */
1900 FALSE, /* pc_relative */
1901 0, /* bitpos */
1902 complain_overflow_dont, /* complain_on_overflow */
1903 ppc64_elf_unhandled_reloc, /* special_function */
1904 "R_PPC64_GOT_TPREL16_LO_DS", /* name */
1905 FALSE, /* partial_inplace */
1906 0, /* src_mask */
1907 0xfffc, /* dst_mask */
1908 FALSE), /* pcrel_offset */
1909
1910 /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */
1911 HOWTO (R_PPC64_GOT_TPREL16_HI,
1912 16, /* rightshift */
1913 1, /* size (0 = byte, 1 = short, 2 = long) */
1914 16, /* bitsize */
1915 FALSE, /* pc_relative */
1916 0, /* bitpos */
1917 complain_overflow_signed, /* complain_on_overflow */
1918 ppc64_elf_unhandled_reloc, /* special_function */
1919 "R_PPC64_GOT_TPREL16_HI", /* name */
1920 FALSE, /* partial_inplace */
1921 0, /* src_mask */
1922 0xffff, /* dst_mask */
1923 FALSE), /* pcrel_offset */
1924
1925 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1926 HOWTO (R_PPC64_GOT_TPREL16_HA,
1927 16, /* rightshift */
1928 1, /* size (0 = byte, 1 = short, 2 = long) */
1929 16, /* bitsize */
1930 FALSE, /* pc_relative */
1931 0, /* bitpos */
1932 complain_overflow_signed, /* complain_on_overflow */
1933 ppc64_elf_unhandled_reloc, /* special_function */
1934 "R_PPC64_GOT_TPREL16_HA", /* name */
1935 FALSE, /* partial_inplace */
1936 0, /* src_mask */
1937 0xffff, /* dst_mask */
1938 FALSE), /* pcrel_offset */
1939
1940 HOWTO (R_PPC64_JMP_IREL, /* type */
1941 0, /* rightshift */
1942 0, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1943 0, /* bitsize */
1944 FALSE, /* pc_relative */
1945 0, /* bitpos */
1946 complain_overflow_dont, /* complain_on_overflow */
1947 ppc64_elf_unhandled_reloc, /* special_function */
1948 "R_PPC64_JMP_IREL", /* name */
1949 FALSE, /* partial_inplace */
1950 0, /* src_mask */
1951 0, /* dst_mask */
1952 FALSE), /* pcrel_offset */
1953
1954 HOWTO (R_PPC64_IRELATIVE, /* type */
1955 0, /* rightshift */
1956 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1957 64, /* bitsize */
1958 FALSE, /* pc_relative */
1959 0, /* bitpos */
1960 complain_overflow_dont, /* complain_on_overflow */
1961 bfd_elf_generic_reloc, /* special_function */
1962 "R_PPC64_IRELATIVE", /* name */
1963 FALSE, /* partial_inplace */
1964 0, /* src_mask */
1965 ONES (64), /* dst_mask */
1966 FALSE), /* pcrel_offset */
1967
1968 /* A 16 bit relative relocation. */
1969 HOWTO (R_PPC64_REL16, /* type */
1970 0, /* rightshift */
1971 1, /* size (0 = byte, 1 = short, 2 = long) */
1972 16, /* bitsize */
1973 TRUE, /* pc_relative */
1974 0, /* bitpos */
1975 complain_overflow_signed, /* complain_on_overflow */
1976 bfd_elf_generic_reloc, /* special_function */
1977 "R_PPC64_REL16", /* name */
1978 FALSE, /* partial_inplace */
1979 0, /* src_mask */
1980 0xffff, /* dst_mask */
1981 TRUE), /* pcrel_offset */
1982
1983 /* A 16 bit relative relocation without overflow. */
1984 HOWTO (R_PPC64_REL16_LO, /* type */
1985 0, /* rightshift */
1986 1, /* size (0 = byte, 1 = short, 2 = long) */
1987 16, /* bitsize */
1988 TRUE, /* pc_relative */
1989 0, /* bitpos */
1990 complain_overflow_dont,/* complain_on_overflow */
1991 bfd_elf_generic_reloc, /* special_function */
1992 "R_PPC64_REL16_LO", /* name */
1993 FALSE, /* partial_inplace */
1994 0, /* src_mask */
1995 0xffff, /* dst_mask */
1996 TRUE), /* pcrel_offset */
1997
1998 /* The high order 16 bits of a relative address. */
1999 HOWTO (R_PPC64_REL16_HI, /* type */
2000 16, /* rightshift */
2001 1, /* size (0 = byte, 1 = short, 2 = long) */
2002 16, /* bitsize */
2003 TRUE, /* pc_relative */
2004 0, /* bitpos */
2005 complain_overflow_signed, /* complain_on_overflow */
2006 bfd_elf_generic_reloc, /* special_function */
2007 "R_PPC64_REL16_HI", /* name */
2008 FALSE, /* partial_inplace */
2009 0, /* src_mask */
2010 0xffff, /* dst_mask */
2011 TRUE), /* pcrel_offset */
2012
2013 /* The high order 16 bits of a relative address, plus 1 if the contents of
2014 the low 16 bits, treated as a signed number, is negative. */
2015 HOWTO (R_PPC64_REL16_HA, /* type */
2016 16, /* rightshift */
2017 1, /* size (0 = byte, 1 = short, 2 = long) */
2018 16, /* bitsize */
2019 TRUE, /* pc_relative */
2020 0, /* bitpos */
2021 complain_overflow_signed, /* complain_on_overflow */
2022 ppc64_elf_ha_reloc, /* special_function */
2023 "R_PPC64_REL16_HA", /* name */
2024 FALSE, /* partial_inplace */
2025 0, /* src_mask */
2026 0xffff, /* dst_mask */
2027 TRUE), /* pcrel_offset */
2028
2029 /* Like R_PPC64_REL16_HA but for split field in addpcis. */
2030 HOWTO (R_PPC64_REL16DX_HA, /* type */
2031 16, /* rightshift */
2032 2, /* size (0 = byte, 1 = short, 2 = long) */
2033 16, /* bitsize */
2034 TRUE, /* pc_relative */
2035 0, /* bitpos */
2036 complain_overflow_signed, /* complain_on_overflow */
2037 ppc64_elf_ha_reloc, /* special_function */
2038 "R_PPC64_REL16DX_HA", /* name */
2039 FALSE, /* partial_inplace */
2040 0, /* src_mask */
2041 0x1fffc1, /* dst_mask */
2042 TRUE), /* pcrel_offset */
2043
2044 /* Like R_PPC64_ADDR16_HI, but no overflow. */
2045 HOWTO (R_PPC64_ADDR16_HIGH, /* type */
2046 16, /* rightshift */
2047 1, /* size (0 = byte, 1 = short, 2 = long) */
2048 16, /* bitsize */
2049 FALSE, /* pc_relative */
2050 0, /* bitpos */
2051 complain_overflow_dont, /* complain_on_overflow */
2052 bfd_elf_generic_reloc, /* special_function */
2053 "R_PPC64_ADDR16_HIGH", /* name */
2054 FALSE, /* partial_inplace */
2055 0, /* src_mask */
2056 0xffff, /* dst_mask */
2057 FALSE), /* pcrel_offset */
2058
2059 /* Like R_PPC64_ADDR16_HA, but no overflow. */
2060 HOWTO (R_PPC64_ADDR16_HIGHA, /* type */
2061 16, /* rightshift */
2062 1, /* size (0 = byte, 1 = short, 2 = long) */
2063 16, /* bitsize */
2064 FALSE, /* pc_relative */
2065 0, /* bitpos */
2066 complain_overflow_dont, /* complain_on_overflow */
2067 ppc64_elf_ha_reloc, /* special_function */
2068 "R_PPC64_ADDR16_HIGHA", /* name */
2069 FALSE, /* partial_inplace */
2070 0, /* src_mask */
2071 0xffff, /* dst_mask */
2072 FALSE), /* pcrel_offset */
2073
2074 /* Like R_PPC64_DTPREL16_HI, but no overflow. */
2075 HOWTO (R_PPC64_DTPREL16_HIGH,
2076 16, /* rightshift */
2077 1, /* size (0 = byte, 1 = short, 2 = long) */
2078 16, /* bitsize */
2079 FALSE, /* pc_relative */
2080 0, /* bitpos */
2081 complain_overflow_dont, /* complain_on_overflow */
2082 ppc64_elf_unhandled_reloc, /* special_function */
2083 "R_PPC64_DTPREL16_HIGH", /* name */
2084 FALSE, /* partial_inplace */
2085 0, /* src_mask */
2086 0xffff, /* dst_mask */
2087 FALSE), /* pcrel_offset */
2088
2089 /* Like R_PPC64_DTPREL16_HA, but no overflow. */
2090 HOWTO (R_PPC64_DTPREL16_HIGHA,
2091 16, /* rightshift */
2092 1, /* size (0 = byte, 1 = short, 2 = long) */
2093 16, /* bitsize */
2094 FALSE, /* pc_relative */
2095 0, /* bitpos */
2096 complain_overflow_dont, /* complain_on_overflow */
2097 ppc64_elf_unhandled_reloc, /* special_function */
2098 "R_PPC64_DTPREL16_HIGHA", /* name */
2099 FALSE, /* partial_inplace */
2100 0, /* src_mask */
2101 0xffff, /* dst_mask */
2102 FALSE), /* pcrel_offset */
2103
2104 /* Like R_PPC64_TPREL16_HI, but no overflow. */
2105 HOWTO (R_PPC64_TPREL16_HIGH,
2106 16, /* rightshift */
2107 1, /* size (0 = byte, 1 = short, 2 = long) */
2108 16, /* bitsize */
2109 FALSE, /* pc_relative */
2110 0, /* bitpos */
2111 complain_overflow_dont, /* complain_on_overflow */
2112 ppc64_elf_unhandled_reloc, /* special_function */
2113 "R_PPC64_TPREL16_HIGH", /* name */
2114 FALSE, /* partial_inplace */
2115 0, /* src_mask */
2116 0xffff, /* dst_mask */
2117 FALSE), /* pcrel_offset */
2118
2119 /* Like R_PPC64_TPREL16_HA, but no overflow. */
2120 HOWTO (R_PPC64_TPREL16_HIGHA,
2121 16, /* rightshift */
2122 1, /* size (0 = byte, 1 = short, 2 = long) */
2123 16, /* bitsize */
2124 FALSE, /* pc_relative */
2125 0, /* bitpos */
2126 complain_overflow_dont, /* complain_on_overflow */
2127 ppc64_elf_unhandled_reloc, /* special_function */
2128 "R_PPC64_TPREL16_HIGHA", /* name */
2129 FALSE, /* partial_inplace */
2130 0, /* src_mask */
2131 0xffff, /* dst_mask */
2132 FALSE), /* pcrel_offset */
2133
2134 /* Marker reloc on ELFv2 large-model function entry. */
2135 HOWTO (R_PPC64_ENTRY,
2136 0, /* rightshift */
2137 2, /* size (0 = byte, 1 = short, 2 = long) */
2138 32, /* bitsize */
2139 FALSE, /* pc_relative */
2140 0, /* bitpos */
2141 complain_overflow_dont, /* complain_on_overflow */
2142 bfd_elf_generic_reloc, /* special_function */
2143 "R_PPC64_ENTRY", /* name */
2144 FALSE, /* partial_inplace */
2145 0, /* src_mask */
2146 0, /* dst_mask */
2147 FALSE), /* pcrel_offset */
2148
2149 /* Like ADDR64, but use local entry point of function. */
2150 HOWTO (R_PPC64_ADDR64_LOCAL, /* type */
2151 0, /* rightshift */
2152 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
2153 64, /* bitsize */
2154 FALSE, /* pc_relative */
2155 0, /* bitpos */
2156 complain_overflow_dont, /* complain_on_overflow */
2157 bfd_elf_generic_reloc, /* special_function */
2158 "R_PPC64_ADDR64_LOCAL", /* name */
2159 FALSE, /* partial_inplace */
2160 0, /* src_mask */
2161 ONES (64), /* dst_mask */
2162 FALSE), /* pcrel_offset */
2163
2164 /* GNU extension to record C++ vtable hierarchy. */
2165 HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
2166 0, /* rightshift */
2167 0, /* size (0 = byte, 1 = short, 2 = long) */
2168 0, /* bitsize */
2169 FALSE, /* pc_relative */
2170 0, /* bitpos */
2171 complain_overflow_dont, /* complain_on_overflow */
2172 NULL, /* special_function */
2173 "R_PPC64_GNU_VTINHERIT", /* name */
2174 FALSE, /* partial_inplace */
2175 0, /* src_mask */
2176 0, /* dst_mask */
2177 FALSE), /* pcrel_offset */
2178
2179 /* GNU extension to record C++ vtable member usage. */
2180 HOWTO (R_PPC64_GNU_VTENTRY, /* type */
2181 0, /* rightshift */
2182 0, /* size (0 = byte, 1 = short, 2 = long) */
2183 0, /* bitsize */
2184 FALSE, /* pc_relative */
2185 0, /* bitpos */
2186 complain_overflow_dont, /* complain_on_overflow */
2187 NULL, /* special_function */
2188 "R_PPC64_GNU_VTENTRY", /* name */
2189 FALSE, /* partial_inplace */
2190 0, /* src_mask */
2191 0, /* dst_mask */
2192 FALSE), /* pcrel_offset */
2193 };
2194
2195 \f
2196 /* Initialize the ppc64_elf_howto_table, so that linear accesses can
2197 be done. */
2198
2199 static void
2200 ppc_howto_init (void)
2201 {
2202 unsigned int i, type;
2203
2204 for (i = 0; i < ARRAY_SIZE (ppc64_elf_howto_raw); i++)
2205 {
2206 type = ppc64_elf_howto_raw[i].type;
2207 BFD_ASSERT (type < ARRAY_SIZE (ppc64_elf_howto_table));
2208 ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
2209 }
2210 }
2211
2212 static reloc_howto_type *
2213 ppc64_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2214 bfd_reloc_code_real_type code)
2215 {
2216 enum elf_ppc64_reloc_type r = R_PPC64_NONE;
2217
2218 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2219 /* Initialize howto table if needed. */
2220 ppc_howto_init ();
2221
2222 switch (code)
2223 {
2224 default:
2225 return NULL;
2226
2227 case BFD_RELOC_NONE: r = R_PPC64_NONE;
2228 break;
2229 case BFD_RELOC_32: r = R_PPC64_ADDR32;
2230 break;
2231 case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24;
2232 break;
2233 case BFD_RELOC_16: r = R_PPC64_ADDR16;
2234 break;
2235 case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO;
2236 break;
2237 case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI;
2238 break;
2239 case BFD_RELOC_PPC64_ADDR16_HIGH: r = R_PPC64_ADDR16_HIGH;
2240 break;
2241 case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA;
2242 break;
2243 case BFD_RELOC_PPC64_ADDR16_HIGHA: r = R_PPC64_ADDR16_HIGHA;
2244 break;
2245 case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14;
2246 break;
2247 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN;
2248 break;
2249 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN;
2250 break;
2251 case BFD_RELOC_PPC_B26: r = R_PPC64_REL24;
2252 break;
2253 case BFD_RELOC_PPC_B16: r = R_PPC64_REL14;
2254 break;
2255 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN;
2256 break;
2257 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN;
2258 break;
2259 case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16;
2260 break;
2261 case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO;
2262 break;
2263 case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI;
2264 break;
2265 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA;
2266 break;
2267 case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY;
2268 break;
2269 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT;
2270 break;
2271 case BFD_RELOC_32_PCREL: r = R_PPC64_REL32;
2272 break;
2273 case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32;
2274 break;
2275 case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32;
2276 break;
2277 case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO;
2278 break;
2279 case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI;
2280 break;
2281 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA;
2282 break;
2283 case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF;
2284 break;
2285 case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO;
2286 break;
2287 case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI;
2288 break;
2289 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA;
2290 break;
2291 case BFD_RELOC_CTOR: r = R_PPC64_ADDR64;
2292 break;
2293 case BFD_RELOC_64: r = R_PPC64_ADDR64;
2294 break;
2295 case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER;
2296 break;
2297 case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA;
2298 break;
2299 case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST;
2300 break;
2301 case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA;
2302 break;
2303 case BFD_RELOC_64_PCREL: r = R_PPC64_REL64;
2304 break;
2305 case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64;
2306 break;
2307 case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64;
2308 break;
2309 case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16;
2310 break;
2311 case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO;
2312 break;
2313 case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI;
2314 break;
2315 case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA;
2316 break;
2317 case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC;
2318 break;
2319 case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16;
2320 break;
2321 case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO;
2322 break;
2323 case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI;
2324 break;
2325 case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA;
2326 break;
2327 case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS;
2328 break;
2329 case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS;
2330 break;
2331 case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS;
2332 break;
2333 case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS;
2334 break;
2335 case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS;
2336 break;
2337 case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS;
2338 break;
2339 case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS;
2340 break;
2341 case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS;
2342 break;
2343 case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS;
2344 break;
2345 case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS;
2346 break;
2347 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS;
2348 break;
2349 case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS;
2350 break;
2351 case BFD_RELOC_PPC_TLSGD: r = R_PPC64_TLSGD;
2352 break;
2353 case BFD_RELOC_PPC_TLSLD: r = R_PPC64_TLSLD;
2354 break;
2355 case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64;
2356 break;
2357 case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16;
2358 break;
2359 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO;
2360 break;
2361 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI;
2362 break;
2363 case BFD_RELOC_PPC64_TPREL16_HIGH: r = R_PPC64_TPREL16_HIGH;
2364 break;
2365 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA;
2366 break;
2367 case BFD_RELOC_PPC64_TPREL16_HIGHA: r = R_PPC64_TPREL16_HIGHA;
2368 break;
2369 case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64;
2370 break;
2371 case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16;
2372 break;
2373 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO;
2374 break;
2375 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI;
2376 break;
2377 case BFD_RELOC_PPC64_DTPREL16_HIGH: r = R_PPC64_DTPREL16_HIGH;
2378 break;
2379 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA;
2380 break;
2381 case BFD_RELOC_PPC64_DTPREL16_HIGHA: r = R_PPC64_DTPREL16_HIGHA;
2382 break;
2383 case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64;
2384 break;
2385 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16;
2386 break;
2387 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO;
2388 break;
2389 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI;
2390 break;
2391 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA;
2392 break;
2393 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16;
2394 break;
2395 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO;
2396 break;
2397 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI;
2398 break;
2399 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA;
2400 break;
2401 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS;
2402 break;
2403 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS;
2404 break;
2405 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI;
2406 break;
2407 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA;
2408 break;
2409 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS;
2410 break;
2411 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS;
2412 break;
2413 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI;
2414 break;
2415 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA;
2416 break;
2417 case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS;
2418 break;
2419 case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS;
2420 break;
2421 case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER;
2422 break;
2423 case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA;
2424 break;
2425 case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST;
2426 break;
2427 case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA;
2428 break;
2429 case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS;
2430 break;
2431 case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS;
2432 break;
2433 case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER;
2434 break;
2435 case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA;
2436 break;
2437 case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST;
2438 break;
2439 case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA;
2440 break;
2441 case BFD_RELOC_16_PCREL: r = R_PPC64_REL16;
2442 break;
2443 case BFD_RELOC_LO16_PCREL: r = R_PPC64_REL16_LO;
2444 break;
2445 case BFD_RELOC_HI16_PCREL: r = R_PPC64_REL16_HI;
2446 break;
2447 case BFD_RELOC_HI16_S_PCREL: r = R_PPC64_REL16_HA;
2448 break;
2449 case BFD_RELOC_PPC_REL16DX_HA: r = R_PPC64_REL16DX_HA;
2450 break;
2451 case BFD_RELOC_PPC64_ENTRY: r = R_PPC64_ENTRY;
2452 break;
2453 case BFD_RELOC_PPC64_ADDR64_LOCAL: r = R_PPC64_ADDR64_LOCAL;
2454 break;
2455 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT;
2456 break;
2457 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY;
2458 break;
2459 }
2460
2461 return ppc64_elf_howto_table[r];
2462 };
2463
2464 static reloc_howto_type *
2465 ppc64_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2466 const char *r_name)
2467 {
2468 unsigned int i;
2469
2470 for (i = 0; i < ARRAY_SIZE (ppc64_elf_howto_raw); i++)
2471 if (ppc64_elf_howto_raw[i].name != NULL
2472 && strcasecmp (ppc64_elf_howto_raw[i].name, r_name) == 0)
2473 return &ppc64_elf_howto_raw[i];
2474
2475 return NULL;
2476 }
2477
2478 /* Set the howto pointer for a PowerPC ELF reloc. */
2479
2480 static void
2481 ppc64_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
2482 Elf_Internal_Rela *dst)
2483 {
2484 unsigned int type;
2485
2486 /* Initialize howto table if needed. */
2487 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2488 ppc_howto_init ();
2489
2490 type = ELF64_R_TYPE (dst->r_info);
2491 if (type >= ARRAY_SIZE (ppc64_elf_howto_table))
2492 {
2493 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
2494 abfd, (int) type);
2495 type = R_PPC64_NONE;
2496 }
2497 cache_ptr->howto = ppc64_elf_howto_table[type];
2498 }
2499
2500 /* Handle the R_PPC64_ADDR16_HA and similar relocs. */
2501
2502 static bfd_reloc_status_type
2503 ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2504 void *data, asection *input_section,
2505 bfd *output_bfd, char **error_message)
2506 {
2507 enum elf_ppc64_reloc_type r_type;
2508 long insn;
2509 bfd_size_type octets;
2510 bfd_vma value;
2511
2512 /* If this is a relocatable link (output_bfd test tells us), just
2513 call the generic function. Any adjustment will be done at final
2514 link time. */
2515 if (output_bfd != NULL)
2516 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2517 input_section, output_bfd, error_message);
2518
2519 /* Adjust the addend for sign extension of the low 16 bits.
2520 We won't actually be using the low 16 bits, so trashing them
2521 doesn't matter. */
2522 reloc_entry->addend += 0x8000;
2523 r_type = reloc_entry->howto->type;
2524 if (r_type != R_PPC64_REL16DX_HA)
2525 return bfd_reloc_continue;
2526
2527 value = 0;
2528 if (!bfd_is_com_section (symbol->section))
2529 value = symbol->value;
2530 value += (reloc_entry->addend
2531 + symbol->section->output_offset
2532 + symbol->section->output_section->vma);
2533 value -= (reloc_entry->address
2534 + input_section->output_offset
2535 + input_section->output_section->vma);
2536 value = (bfd_signed_vma) value >> 16;
2537
2538 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2539 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2540 insn &= ~0x1fffc1;
2541 insn |= (value & 0xffc1) | ((value & 0x3e) << 15);
2542 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2543 if (value + 0x8000 > 0xffff)
2544 return bfd_reloc_overflow;
2545 return bfd_reloc_ok;
2546 }
2547
2548 static bfd_reloc_status_type
2549 ppc64_elf_branch_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2550 void *data, asection *input_section,
2551 bfd *output_bfd, char **error_message)
2552 {
2553 if (output_bfd != NULL)
2554 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2555 input_section, output_bfd, error_message);
2556
2557 if (strcmp (symbol->section->name, ".opd") == 0
2558 && (symbol->section->owner->flags & DYNAMIC) == 0)
2559 {
2560 bfd_vma dest = opd_entry_value (symbol->section,
2561 symbol->value + reloc_entry->addend,
2562 NULL, NULL, FALSE);
2563 if (dest != (bfd_vma) -1)
2564 reloc_entry->addend = dest - (symbol->value
2565 + symbol->section->output_section->vma
2566 + symbol->section->output_offset);
2567 }
2568 else
2569 {
2570 elf_symbol_type *elfsym = (elf_symbol_type *) symbol;
2571
2572 if (symbol->section->owner != abfd
2573 && symbol->section->owner != NULL
2574 && abiversion (symbol->section->owner) >= 2)
2575 {
2576 unsigned int i;
2577
2578 for (i = 0; i < symbol->section->owner->symcount; ++i)
2579 {
2580 asymbol *symdef = symbol->section->owner->outsymbols[i];
2581
2582 if (strcmp (symdef->name, symbol->name) == 0)
2583 {
2584 elfsym = (elf_symbol_type *) symdef;
2585 break;
2586 }
2587 }
2588 }
2589 reloc_entry->addend
2590 += PPC64_LOCAL_ENTRY_OFFSET (elfsym->internal_elf_sym.st_other);
2591 }
2592 return bfd_reloc_continue;
2593 }
2594
2595 static bfd_reloc_status_type
2596 ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2597 void *data, asection *input_section,
2598 bfd *output_bfd, char **error_message)
2599 {
2600 long insn;
2601 enum elf_ppc64_reloc_type r_type;
2602 bfd_size_type octets;
2603 /* Assume 'at' branch hints. */
2604 bfd_boolean is_isa_v2 = TRUE;
2605
2606 /* If this is a relocatable link (output_bfd test tells us), just
2607 call the generic function. Any adjustment will be done at final
2608 link time. */
2609 if (output_bfd != NULL)
2610 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2611 input_section, output_bfd, error_message);
2612
2613 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2614 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2615 insn &= ~(0x01 << 21);
2616 r_type = reloc_entry->howto->type;
2617 if (r_type == R_PPC64_ADDR14_BRTAKEN
2618 || r_type == R_PPC64_REL14_BRTAKEN)
2619 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
2620
2621 if (is_isa_v2)
2622 {
2623 /* Set 'a' bit. This is 0b00010 in BO field for branch
2624 on CR(BI) insns (BO == 001at or 011at), and 0b01000
2625 for branch on CTR insns (BO == 1a00t or 1a01t). */
2626 if ((insn & (0x14 << 21)) == (0x04 << 21))
2627 insn |= 0x02 << 21;
2628 else if ((insn & (0x14 << 21)) == (0x10 << 21))
2629 insn |= 0x08 << 21;
2630 else
2631 goto out;
2632 }
2633 else
2634 {
2635 bfd_vma target = 0;
2636 bfd_vma from;
2637
2638 if (!bfd_is_com_section (symbol->section))
2639 target = symbol->value;
2640 target += symbol->section->output_section->vma;
2641 target += symbol->section->output_offset;
2642 target += reloc_entry->addend;
2643
2644 from = (reloc_entry->address
2645 + input_section->output_offset
2646 + input_section->output_section->vma);
2647
2648 /* Invert 'y' bit if not the default. */
2649 if ((bfd_signed_vma) (target - from) < 0)
2650 insn ^= 0x01 << 21;
2651 }
2652 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2653 out:
2654 return ppc64_elf_branch_reloc (abfd, reloc_entry, symbol, data,
2655 input_section, output_bfd, error_message);
2656 }
2657
2658 static bfd_reloc_status_type
2659 ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2660 void *data, asection *input_section,
2661 bfd *output_bfd, char **error_message)
2662 {
2663 /* If this is a relocatable link (output_bfd test tells us), just
2664 call the generic function. Any adjustment will be done at final
2665 link time. */
2666 if (output_bfd != NULL)
2667 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2668 input_section, output_bfd, error_message);
2669
2670 /* Subtract the symbol section base address. */
2671 reloc_entry->addend -= symbol->section->output_section->vma;
2672 return bfd_reloc_continue;
2673 }
2674
2675 static bfd_reloc_status_type
2676 ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2677 void *data, asection *input_section,
2678 bfd *output_bfd, char **error_message)
2679 {
2680 /* If this is a relocatable link (output_bfd test tells us), just
2681 call the generic function. Any adjustment will be done at final
2682 link time. */
2683 if (output_bfd != NULL)
2684 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2685 input_section, output_bfd, error_message);
2686
2687 /* Subtract the symbol section base address. */
2688 reloc_entry->addend -= symbol->section->output_section->vma;
2689
2690 /* Adjust the addend for sign extension of the low 16 bits. */
2691 reloc_entry->addend += 0x8000;
2692 return bfd_reloc_continue;
2693 }
2694
2695 static bfd_reloc_status_type
2696 ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2697 void *data, asection *input_section,
2698 bfd *output_bfd, char **error_message)
2699 {
2700 bfd_vma TOCstart;
2701
2702 /* If this is a relocatable link (output_bfd test tells us), just
2703 call the generic function. Any adjustment will be done at final
2704 link time. */
2705 if (output_bfd != NULL)
2706 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2707 input_section, output_bfd, error_message);
2708
2709 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2710 if (TOCstart == 0)
2711 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2712
2713 /* Subtract the TOC base address. */
2714 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2715 return bfd_reloc_continue;
2716 }
2717
2718 static bfd_reloc_status_type
2719 ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2720 void *data, asection *input_section,
2721 bfd *output_bfd, char **error_message)
2722 {
2723 bfd_vma TOCstart;
2724
2725 /* If this is a relocatable link (output_bfd test tells us), just
2726 call the generic function. Any adjustment will be done at final
2727 link time. */
2728 if (output_bfd != NULL)
2729 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2730 input_section, output_bfd, error_message);
2731
2732 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2733 if (TOCstart == 0)
2734 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2735
2736 /* Subtract the TOC base address. */
2737 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2738
2739 /* Adjust the addend for sign extension of the low 16 bits. */
2740 reloc_entry->addend += 0x8000;
2741 return bfd_reloc_continue;
2742 }
2743
2744 static bfd_reloc_status_type
2745 ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2746 void *data, asection *input_section,
2747 bfd *output_bfd, char **error_message)
2748 {
2749 bfd_vma TOCstart;
2750 bfd_size_type octets;
2751
2752 /* If this is a relocatable link (output_bfd test tells us), just
2753 call the generic function. Any adjustment will be done at final
2754 link time. */
2755 if (output_bfd != NULL)
2756 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2757 input_section, output_bfd, error_message);
2758
2759 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2760 if (TOCstart == 0)
2761 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2762
2763 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2764 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
2765 return bfd_reloc_ok;
2766 }
2767
2768 static bfd_reloc_status_type
2769 ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2770 void *data, asection *input_section,
2771 bfd *output_bfd, char **error_message)
2772 {
2773 /* If this is a relocatable link (output_bfd test tells us), just
2774 call the generic function. Any adjustment will be done at final
2775 link time. */
2776 if (output_bfd != NULL)
2777 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2778 input_section, output_bfd, error_message);
2779
2780 if (error_message != NULL)
2781 {
2782 static char buf[60];
2783 sprintf (buf, "generic linker can't handle %s",
2784 reloc_entry->howto->name);
2785 *error_message = buf;
2786 }
2787 return bfd_reloc_dangerous;
2788 }
2789
2790 /* Track GOT entries needed for a given symbol. We might need more
2791 than one got entry per symbol. */
2792 struct got_entry
2793 {
2794 struct got_entry *next;
2795
2796 /* The symbol addend that we'll be placing in the GOT. */
2797 bfd_vma addend;
2798
2799 /* Unlike other ELF targets, we use separate GOT entries for the same
2800 symbol referenced from different input files. This is to support
2801 automatic multiple TOC/GOT sections, where the TOC base can vary
2802 from one input file to another. After partitioning into TOC groups
2803 we merge entries within the group.
2804
2805 Point to the BFD owning this GOT entry. */
2806 bfd *owner;
2807
2808 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
2809 TLS_TPREL or TLS_DTPREL for tls entries. */
2810 unsigned char tls_type;
2811
2812 /* Non-zero if got.ent points to real entry. */
2813 unsigned char is_indirect;
2814
2815 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
2816 union
2817 {
2818 bfd_signed_vma refcount;
2819 bfd_vma offset;
2820 struct got_entry *ent;
2821 } got;
2822 };
2823
2824 /* The same for PLT. */
2825 struct plt_entry
2826 {
2827 struct plt_entry *next;
2828
2829 bfd_vma addend;
2830
2831 union
2832 {
2833 bfd_signed_vma refcount;
2834 bfd_vma offset;
2835 } plt;
2836 };
2837
2838 struct ppc64_elf_obj_tdata
2839 {
2840 struct elf_obj_tdata elf;
2841
2842 /* Shortcuts to dynamic linker sections. */
2843 asection *got;
2844 asection *relgot;
2845
2846 /* Used during garbage collection. We attach global symbols defined
2847 on removed .opd entries to this section so that the sym is removed. */
2848 asection *deleted_section;
2849
2850 /* TLS local dynamic got entry handling. Support for multiple GOT
2851 sections means we potentially need one of these for each input bfd. */
2852 struct got_entry tlsld_got;
2853
2854 union {
2855 /* A copy of relocs before they are modified for --emit-relocs. */
2856 Elf_Internal_Rela *relocs;
2857
2858 /* Section contents. */
2859 bfd_byte *contents;
2860 } opd;
2861
2862 /* Nonzero if this bfd has small toc/got relocs, ie. that expect
2863 the reloc to be in the range -32768 to 32767. */
2864 unsigned int has_small_toc_reloc : 1;
2865
2866 /* Set if toc/got ha relocs detected not using r2, or lo reloc
2867 instruction not one we handle. */
2868 unsigned int unexpected_toc_insn : 1;
2869 };
2870
2871 #define ppc64_elf_tdata(bfd) \
2872 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
2873
2874 #define ppc64_tlsld_got(bfd) \
2875 (&ppc64_elf_tdata (bfd)->tlsld_got)
2876
2877 #define is_ppc64_elf(bfd) \
2878 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2879 && elf_object_id (bfd) == PPC64_ELF_DATA)
2880
2881 /* Override the generic function because we store some extras. */
2882
2883 static bfd_boolean
2884 ppc64_elf_mkobject (bfd *abfd)
2885 {
2886 return bfd_elf_allocate_object (abfd, sizeof (struct ppc64_elf_obj_tdata),
2887 PPC64_ELF_DATA);
2888 }
2889
2890 /* Fix bad default arch selected for a 64 bit input bfd when the
2891 default is 32 bit. Also select arch based on apuinfo. */
2892
2893 static bfd_boolean
2894 ppc64_elf_object_p (bfd *abfd)
2895 {
2896 if (!abfd->arch_info->the_default)
2897 return TRUE;
2898
2899 if (abfd->arch_info->bits_per_word == 32)
2900 {
2901 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2902
2903 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2904 {
2905 /* Relies on arch after 32 bit default being 64 bit default. */
2906 abfd->arch_info = abfd->arch_info->next;
2907 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2908 }
2909 }
2910 return _bfd_elf_ppc_set_arch (abfd);
2911 }
2912
2913 /* Support for core dump NOTE sections. */
2914
2915 static bfd_boolean
2916 ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2917 {
2918 size_t offset, size;
2919
2920 if (note->descsz != 504)
2921 return FALSE;
2922
2923 /* pr_cursig */
2924 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
2925
2926 /* pr_pid */
2927 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 32);
2928
2929 /* pr_reg */
2930 offset = 112;
2931 size = 384;
2932
2933 /* Make a ".reg/999" section. */
2934 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2935 size, note->descpos + offset);
2936 }
2937
2938 static bfd_boolean
2939 ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2940 {
2941 if (note->descsz != 136)
2942 return FALSE;
2943
2944 elf_tdata (abfd)->core->pid
2945 = bfd_get_32 (abfd, note->descdata + 24);
2946 elf_tdata (abfd)->core->program
2947 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
2948 elf_tdata (abfd)->core->command
2949 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
2950
2951 return TRUE;
2952 }
2953
2954 static char *
2955 ppc64_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type,
2956 ...)
2957 {
2958 switch (note_type)
2959 {
2960 default:
2961 return NULL;
2962
2963 case NT_PRPSINFO:
2964 {
2965 char data[136];
2966 va_list ap;
2967
2968 va_start (ap, note_type);
2969 memset (data, 0, sizeof (data));
2970 strncpy (data + 40, va_arg (ap, const char *), 16);
2971 strncpy (data + 56, va_arg (ap, const char *), 80);
2972 va_end (ap);
2973 return elfcore_write_note (abfd, buf, bufsiz,
2974 "CORE", note_type, data, sizeof (data));
2975 }
2976
2977 case NT_PRSTATUS:
2978 {
2979 char data[504];
2980 va_list ap;
2981 long pid;
2982 int cursig;
2983 const void *greg;
2984
2985 va_start (ap, note_type);
2986 memset (data, 0, 112);
2987 pid = va_arg (ap, long);
2988 bfd_put_32 (abfd, pid, data + 32);
2989 cursig = va_arg (ap, int);
2990 bfd_put_16 (abfd, cursig, data + 12);
2991 greg = va_arg (ap, const void *);
2992 memcpy (data + 112, greg, 384);
2993 memset (data + 496, 0, 8);
2994 va_end (ap);
2995 return elfcore_write_note (abfd, buf, bufsiz,
2996 "CORE", note_type, data, sizeof (data));
2997 }
2998 }
2999 }
3000
3001 /* Add extra PPC sections. */
3002
3003 static const struct bfd_elf_special_section ppc64_elf_special_sections[]=
3004 {
3005 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, 0 },
3006 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
3007 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
3008 { STRING_COMMA_LEN (".toc"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
3009 { STRING_COMMA_LEN (".toc1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
3010 { STRING_COMMA_LEN (".tocbss"), 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
3011 { NULL, 0, 0, 0, 0 }
3012 };
3013
3014 enum _ppc64_sec_type {
3015 sec_normal = 0,
3016 sec_opd = 1,
3017 sec_toc = 2
3018 };
3019
3020 struct _ppc64_elf_section_data
3021 {
3022 struct bfd_elf_section_data elf;
3023
3024 union
3025 {
3026 /* An array with one entry for each opd function descriptor,
3027 and some spares since opd entries may be either 16 or 24 bytes. */
3028 #define OPD_NDX(OFF) ((OFF) >> 4)
3029 struct _opd_sec_data
3030 {
3031 /* Points to the function code section for local opd entries. */
3032 asection **func_sec;
3033
3034 /* After editing .opd, adjust references to opd local syms. */
3035 long *adjust;
3036 } opd;
3037
3038 /* An array for toc sections, indexed by offset/8. */
3039 struct _toc_sec_data
3040 {
3041 /* Specifies the relocation symbol index used at a given toc offset. */
3042 unsigned *symndx;
3043
3044 /* And the relocation addend. */
3045 bfd_vma *add;
3046 } toc;
3047 } u;
3048
3049 enum _ppc64_sec_type sec_type:2;
3050
3051 /* Flag set when small branches are detected. Used to
3052 select suitable defaults for the stub group size. */
3053 unsigned int has_14bit_branch:1;
3054 };
3055
3056 #define ppc64_elf_section_data(sec) \
3057 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
3058
3059 static bfd_boolean
3060 ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
3061 {
3062 if (!sec->used_by_bfd)
3063 {
3064 struct _ppc64_elf_section_data *sdata;
3065 bfd_size_type amt = sizeof (*sdata);
3066
3067 sdata = bfd_zalloc (abfd, amt);
3068 if (sdata == NULL)
3069 return FALSE;
3070 sec->used_by_bfd = sdata;
3071 }
3072
3073 return _bfd_elf_new_section_hook (abfd, sec);
3074 }
3075
3076 static struct _opd_sec_data *
3077 get_opd_info (asection * sec)
3078 {
3079 if (sec != NULL
3080 && ppc64_elf_section_data (sec) != NULL
3081 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
3082 return &ppc64_elf_section_data (sec)->u.opd;
3083 return NULL;
3084 }
3085 \f
3086 /* Parameters for the qsort hook. */
3087 static bfd_boolean synthetic_relocatable;
3088 static asection *synthetic_opd;
3089
3090 /* qsort comparison function for ppc64_elf_get_synthetic_symtab. */
3091
3092 static int
3093 compare_symbols (const void *ap, const void *bp)
3094 {
3095 const asymbol *a = * (const asymbol **) ap;
3096 const asymbol *b = * (const asymbol **) bp;
3097
3098 /* Section symbols first. */
3099 if ((a->flags & BSF_SECTION_SYM) && !(b->flags & BSF_SECTION_SYM))
3100 return -1;
3101 if (!(a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM))
3102 return 1;
3103
3104 /* then .opd symbols. */
3105 if (synthetic_opd != NULL)
3106 {
3107 if (strcmp (a->section->name, ".opd") == 0
3108 && strcmp (b->section->name, ".opd") != 0)
3109 return -1;
3110 if (strcmp (a->section->name, ".opd") != 0
3111 && strcmp (b->section->name, ".opd") == 0)
3112 return 1;
3113 }
3114
3115 /* then other code symbols. */
3116 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3117 == (SEC_CODE | SEC_ALLOC)
3118 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3119 != (SEC_CODE | SEC_ALLOC))
3120 return -1;
3121
3122 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3123 != (SEC_CODE | SEC_ALLOC)
3124 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3125 == (SEC_CODE | SEC_ALLOC))
3126 return 1;
3127
3128 if (synthetic_relocatable)
3129 {
3130 if (a->section->id < b->section->id)
3131 return -1;
3132
3133 if (a->section->id > b->section->id)
3134 return 1;
3135 }
3136
3137 if (a->value + a->section->vma < b->value + b->section->vma)
3138 return -1;
3139
3140 if (a->value + a->section->vma > b->value + b->section->vma)
3141 return 1;
3142
3143 /* For syms with the same value, prefer strong dynamic global function
3144 syms over other syms. */
3145 if ((a->flags & BSF_GLOBAL) != 0 && (b->flags & BSF_GLOBAL) == 0)
3146 return -1;
3147
3148 if ((a->flags & BSF_GLOBAL) == 0 && (b->flags & BSF_GLOBAL) != 0)
3149 return 1;
3150
3151 if ((a->flags & BSF_FUNCTION) != 0 && (b->flags & BSF_FUNCTION) == 0)
3152 return -1;
3153
3154 if ((a->flags & BSF_FUNCTION) == 0 && (b->flags & BSF_FUNCTION) != 0)
3155 return 1;
3156
3157 if ((a->flags & BSF_WEAK) == 0 && (b->flags & BSF_WEAK) != 0)
3158 return -1;
3159
3160 if ((a->flags & BSF_WEAK) != 0 && (b->flags & BSF_WEAK) == 0)
3161 return 1;
3162
3163 if ((a->flags & BSF_DYNAMIC) != 0 && (b->flags & BSF_DYNAMIC) == 0)
3164 return -1;
3165
3166 if ((a->flags & BSF_DYNAMIC) == 0 && (b->flags & BSF_DYNAMIC) != 0)
3167 return 1;
3168
3169 return 0;
3170 }
3171
3172 /* Search SYMS for a symbol of the given VALUE. */
3173
3174 static asymbol *
3175 sym_exists_at (asymbol **syms, long lo, long hi, unsigned int id, bfd_vma value)
3176 {
3177 long mid;
3178
3179 if (id == (unsigned) -1)
3180 {
3181 while (lo < hi)
3182 {
3183 mid = (lo + hi) >> 1;
3184 if (syms[mid]->value + syms[mid]->section->vma < value)
3185 lo = mid + 1;
3186 else if (syms[mid]->value + syms[mid]->section->vma > value)
3187 hi = mid;
3188 else
3189 return syms[mid];
3190 }
3191 }
3192 else
3193 {
3194 while (lo < hi)
3195 {
3196 mid = (lo + hi) >> 1;
3197 if (syms[mid]->section->id < id)
3198 lo = mid + 1;
3199 else if (syms[mid]->section->id > id)
3200 hi = mid;
3201 else if (syms[mid]->value < value)
3202 lo = mid + 1;
3203 else if (syms[mid]->value > value)
3204 hi = mid;
3205 else
3206 return syms[mid];
3207 }
3208 }
3209 return NULL;
3210 }
3211
3212 static bfd_boolean
3213 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
3214 {
3215 bfd_vma vma = *(bfd_vma *) ptr;
3216 return ((section->flags & SEC_ALLOC) != 0
3217 && section->vma <= vma
3218 && vma < section->vma + section->size);
3219 }
3220
3221 /* Create synthetic symbols, effectively restoring "dot-symbol" function
3222 entry syms. Also generate @plt symbols for the glink branch table.
3223 Returns count of synthetic symbols in RET or -1 on error. */
3224
3225 static long
3226 ppc64_elf_get_synthetic_symtab (bfd *abfd,
3227 long static_count, asymbol **static_syms,
3228 long dyn_count, asymbol **dyn_syms,
3229 asymbol **ret)
3230 {
3231 asymbol *s;
3232 long i;
3233 long count;
3234 char *names;
3235 long symcount, codesecsym, codesecsymend, secsymend, opdsymend;
3236 asection *opd = NULL;
3237 bfd_boolean relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0;
3238 asymbol **syms;
3239 int abi = abiversion (abfd);
3240
3241 *ret = NULL;
3242
3243 if (abi < 2)
3244 {
3245 opd = bfd_get_section_by_name (abfd, ".opd");
3246 if (opd == NULL && abi == 1)
3247 return 0;
3248 }
3249
3250 symcount = static_count;
3251 if (!relocatable)
3252 symcount += dyn_count;
3253 if (symcount == 0)
3254 return 0;
3255
3256 syms = bfd_malloc ((symcount + 1) * sizeof (*syms));
3257 if (syms == NULL)
3258 return -1;
3259
3260 if (!relocatable && static_count != 0 && dyn_count != 0)
3261 {
3262 /* Use both symbol tables. */
3263 memcpy (syms, static_syms, static_count * sizeof (*syms));
3264 memcpy (syms + static_count, dyn_syms, (dyn_count + 1) * sizeof (*syms));
3265 }
3266 else if (!relocatable && static_count == 0)
3267 memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms));
3268 else
3269 memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms));
3270
3271 synthetic_relocatable = relocatable;
3272 synthetic_opd = opd;
3273 qsort (syms, symcount, sizeof (*syms), compare_symbols);
3274
3275 if (!relocatable && symcount > 1)
3276 {
3277 long j;
3278 /* Trim duplicate syms, since we may have merged the normal and
3279 dynamic symbols. Actually, we only care about syms that have
3280 different values, so trim any with the same value. */
3281 for (i = 1, j = 1; i < symcount; ++i)
3282 if (syms[i - 1]->value + syms[i - 1]->section->vma
3283 != syms[i]->value + syms[i]->section->vma)
3284 syms[j++] = syms[i];
3285 symcount = j;
3286 }
3287
3288 i = 0;
3289 /* Note that here and in compare_symbols we can't compare opd and
3290 sym->section directly. With separate debug info files, the
3291 symbols will be extracted from the debug file while abfd passed
3292 to this function is the real binary. */
3293 if (opd != NULL && strcmp (syms[i]->section->name, ".opd") == 0)
3294 ++i;
3295 codesecsym = i;
3296
3297 for (; i < symcount; ++i)
3298 if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3299 != (SEC_CODE | SEC_ALLOC))
3300 || (syms[i]->flags & BSF_SECTION_SYM) == 0)
3301 break;
3302 codesecsymend = i;
3303
3304 for (; i < symcount; ++i)
3305 if ((syms[i]->flags & BSF_SECTION_SYM) == 0)
3306 break;
3307 secsymend = i;
3308
3309 if (opd != NULL)
3310 for (; i < symcount; ++i)
3311 if (strcmp (syms[i]->section->name, ".opd") != 0)
3312 break;
3313 opdsymend = i;
3314
3315 for (; i < symcount; ++i)
3316 if ((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3317 != (SEC_CODE | SEC_ALLOC))
3318 break;
3319 symcount = i;
3320
3321 count = 0;
3322
3323 if (relocatable)
3324 {
3325 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3326 arelent *r;
3327 size_t size;
3328 long relcount;
3329
3330 if (opdsymend == secsymend)
3331 goto done;
3332
3333 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3334 relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0;
3335 if (relcount == 0)
3336 goto done;
3337
3338 if (!(*slurp_relocs) (abfd, opd, static_syms, FALSE))
3339 {
3340 count = -1;
3341 goto done;
3342 }
3343
3344 size = 0;
3345 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3346 {
3347 asymbol *sym;
3348
3349 while (r < opd->relocation + relcount
3350 && r->address < syms[i]->value + opd->vma)
3351 ++r;
3352
3353 if (r == opd->relocation + relcount)
3354 break;
3355
3356 if (r->address != syms[i]->value + opd->vma)
3357 continue;
3358
3359 if (r->howto->type != R_PPC64_ADDR64)
3360 continue;
3361
3362 sym = *r->sym_ptr_ptr;
3363 if (!sym_exists_at (syms, opdsymend, symcount,
3364 sym->section->id, sym->value + r->addend))
3365 {
3366 ++count;
3367 size += sizeof (asymbol);
3368 size += strlen (syms[i]->name) + 2;
3369 }
3370 }
3371
3372 if (size == 0)
3373 goto done;
3374 s = *ret = bfd_malloc (size);
3375 if (s == NULL)
3376 {
3377 count = -1;
3378 goto done;
3379 }
3380
3381 names = (char *) (s + count);
3382
3383 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3384 {
3385 asymbol *sym;
3386
3387 while (r < opd->relocation + relcount
3388 && r->address < syms[i]->value + opd->vma)
3389 ++r;
3390
3391 if (r == opd->relocation + relcount)
3392 break;
3393
3394 if (r->address != syms[i]->value + opd->vma)
3395 continue;
3396
3397 if (r->howto->type != R_PPC64_ADDR64)
3398 continue;
3399
3400 sym = *r->sym_ptr_ptr;
3401 if (!sym_exists_at (syms, opdsymend, symcount,
3402 sym->section->id, sym->value + r->addend))
3403 {
3404 size_t len;
3405
3406 *s = *syms[i];
3407 s->flags |= BSF_SYNTHETIC;
3408 s->section = sym->section;
3409 s->value = sym->value + r->addend;
3410 s->name = names;
3411 *names++ = '.';
3412 len = strlen (syms[i]->name);
3413 memcpy (names, syms[i]->name, len + 1);
3414 names += len + 1;
3415 /* Have udata.p point back to the original symbol this
3416 synthetic symbol was derived from. */
3417 s->udata.p = syms[i];
3418 s++;
3419 }
3420 }
3421 }
3422 else
3423 {
3424 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3425 bfd_byte *contents = NULL;
3426 size_t size;
3427 long plt_count = 0;
3428 bfd_vma glink_vma = 0, resolv_vma = 0;
3429 asection *dynamic, *glink = NULL, *relplt = NULL;
3430 arelent *p;
3431
3432 if (opd != NULL && !bfd_malloc_and_get_section (abfd, opd, &contents))
3433 {
3434 free_contents_and_exit_err:
3435 count = -1;
3436 free_contents_and_exit:
3437 if (contents)
3438 free (contents);
3439 goto done;
3440 }
3441
3442 size = 0;
3443 for (i = secsymend; i < opdsymend; ++i)
3444 {
3445 bfd_vma ent;
3446
3447 /* Ignore bogus symbols. */
3448 if (syms[i]->value > opd->size - 8)
3449 continue;
3450
3451 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3452 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3453 {
3454 ++count;
3455 size += sizeof (asymbol);
3456 size += strlen (syms[i]->name) + 2;
3457 }
3458 }
3459
3460 /* Get start of .glink stubs from DT_PPC64_GLINK. */
3461 if (dyn_count != 0
3462 && (dynamic = bfd_get_section_by_name (abfd, ".dynamic")) != NULL)
3463 {
3464 bfd_byte *dynbuf, *extdyn, *extdynend;
3465 size_t extdynsize;
3466 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
3467
3468 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
3469 goto free_contents_and_exit_err;
3470
3471 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
3472 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
3473
3474 extdyn = dynbuf;
3475 extdynend = extdyn + dynamic->size;
3476 for (; extdyn < extdynend; extdyn += extdynsize)
3477 {
3478 Elf_Internal_Dyn dyn;
3479 (*swap_dyn_in) (abfd, extdyn, &dyn);
3480
3481 if (dyn.d_tag == DT_NULL)
3482 break;
3483
3484 if (dyn.d_tag == DT_PPC64_GLINK)
3485 {
3486 /* The first glink stub starts at offset 32; see
3487 comment in ppc64_elf_finish_dynamic_sections. */
3488 glink_vma = dyn.d_un.d_val + GLINK_CALL_STUB_SIZE - 8 * 4;
3489 /* The .glink section usually does not survive the final
3490 link; search for the section (usually .text) where the
3491 glink stubs now reside. */
3492 glink = bfd_sections_find_if (abfd, section_covers_vma,
3493 &glink_vma);
3494 break;
3495 }
3496 }
3497
3498 free (dynbuf);
3499 }
3500
3501 if (glink != NULL)
3502 {
3503 /* Determine __glink trampoline by reading the relative branch
3504 from the first glink stub. */
3505 bfd_byte buf[4];
3506 unsigned int off = 0;
3507
3508 while (bfd_get_section_contents (abfd, glink, buf,
3509 glink_vma + off - glink->vma, 4))
3510 {
3511 unsigned int insn = bfd_get_32 (abfd, buf);
3512 insn ^= B_DOT;
3513 if ((insn & ~0x3fffffc) == 0)
3514 {
3515 resolv_vma = glink_vma + off + (insn ^ 0x2000000) - 0x2000000;
3516 break;
3517 }
3518 off += 4;
3519 if (off > 4)
3520 break;
3521 }
3522
3523 if (resolv_vma)
3524 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
3525
3526 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
3527 if (relplt != NULL)
3528 {
3529 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3530 if (! (*slurp_relocs) (abfd, relplt, dyn_syms, TRUE))
3531 goto free_contents_and_exit_err;
3532
3533 plt_count = relplt->size / sizeof (Elf64_External_Rela);
3534 size += plt_count * sizeof (asymbol);
3535
3536 p = relplt->relocation;
3537 for (i = 0; i < plt_count; i++, p++)
3538 {
3539 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
3540 if (p->addend != 0)
3541 size += sizeof ("+0x") - 1 + 16;
3542 }
3543 }
3544 }
3545
3546 if (size == 0)
3547 goto free_contents_and_exit;
3548 s = *ret = bfd_malloc (size);
3549 if (s == NULL)
3550 goto free_contents_and_exit_err;
3551
3552 names = (char *) (s + count + plt_count + (resolv_vma != 0));
3553
3554 for (i = secsymend; i < opdsymend; ++i)
3555 {
3556 bfd_vma ent;
3557
3558 if (syms[i]->value > opd->size - 8)
3559 continue;
3560
3561 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3562 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3563 {
3564 long lo, hi;
3565 size_t len;
3566 asection *sec = abfd->sections;
3567
3568 *s = *syms[i];
3569 lo = codesecsym;
3570 hi = codesecsymend;
3571 while (lo < hi)
3572 {
3573 long mid = (lo + hi) >> 1;
3574 if (syms[mid]->section->vma < ent)
3575 lo = mid + 1;
3576 else if (syms[mid]->section->vma > ent)
3577 hi = mid;
3578 else
3579 {
3580 sec = syms[mid]->section;
3581 break;
3582 }
3583 }
3584
3585 if (lo >= hi && lo > codesecsym)
3586 sec = syms[lo - 1]->section;
3587
3588 for (; sec != NULL; sec = sec->next)
3589 {
3590 if (sec->vma > ent)
3591 break;
3592 /* SEC_LOAD may not be set if SEC is from a separate debug
3593 info file. */
3594 if ((sec->flags & SEC_ALLOC) == 0)
3595 break;
3596 if ((sec->flags & SEC_CODE) != 0)
3597 s->section = sec;
3598 }
3599 s->flags |= BSF_SYNTHETIC;
3600 s->value = ent - s->section->vma;
3601 s->name = names;
3602 *names++ = '.';
3603 len = strlen (syms[i]->name);
3604 memcpy (names, syms[i]->name, len + 1);
3605 names += len + 1;
3606 /* Have udata.p point back to the original symbol this
3607 synthetic symbol was derived from. */
3608 s->udata.p = syms[i];
3609 s++;
3610 }
3611 }
3612 free (contents);
3613
3614 if (glink != NULL && relplt != NULL)
3615 {
3616 if (resolv_vma)
3617 {
3618 /* Add a symbol for the main glink trampoline. */
3619 memset (s, 0, sizeof *s);
3620 s->the_bfd = abfd;
3621 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3622 s->section = glink;
3623 s->value = resolv_vma - glink->vma;
3624 s->name = names;
3625 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3626 names += sizeof ("__glink_PLTresolve");
3627 s++;
3628 count++;
3629 }
3630
3631 /* FIXME: It would be very much nicer to put sym@plt on the
3632 stub rather than on the glink branch table entry. The
3633 objdump disassembler would then use a sensible symbol
3634 name on plt calls. The difficulty in doing so is
3635 a) finding the stubs, and,
3636 b) matching stubs against plt entries, and,
3637 c) there can be multiple stubs for a given plt entry.
3638
3639 Solving (a) could be done by code scanning, but older
3640 ppc64 binaries used different stubs to current code.
3641 (b) is the tricky one since you need to known the toc
3642 pointer for at least one function that uses a pic stub to
3643 be able to calculate the plt address referenced.
3644 (c) means gdb would need to set multiple breakpoints (or
3645 find the glink branch itself) when setting breakpoints
3646 for pending shared library loads. */
3647 p = relplt->relocation;
3648 for (i = 0; i < plt_count; i++, p++)
3649 {
3650 size_t len;
3651
3652 *s = **p->sym_ptr_ptr;
3653 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
3654 we are defining a symbol, ensure one of them is set. */
3655 if ((s->flags & BSF_LOCAL) == 0)
3656 s->flags |= BSF_GLOBAL;
3657 s->flags |= BSF_SYNTHETIC;
3658 s->section = glink;
3659 s->value = glink_vma - glink->vma;
3660 s->name = names;
3661 s->udata.p = NULL;
3662 len = strlen ((*p->sym_ptr_ptr)->name);
3663 memcpy (names, (*p->sym_ptr_ptr)->name, len);
3664 names += len;
3665 if (p->addend != 0)
3666 {
3667 memcpy (names, "+0x", sizeof ("+0x") - 1);
3668 names += sizeof ("+0x") - 1;
3669 bfd_sprintf_vma (abfd, names, p->addend);
3670 names += strlen (names);
3671 }
3672 memcpy (names, "@plt", sizeof ("@plt"));
3673 names += sizeof ("@plt");
3674 s++;
3675 if (abi < 2)
3676 {
3677 glink_vma += 8;
3678 if (i >= 0x8000)
3679 glink_vma += 4;
3680 }
3681 else
3682 glink_vma += 4;
3683 }
3684 count += plt_count;
3685 }
3686 }
3687
3688 done:
3689 free (syms);
3690 return count;
3691 }
3692 \f
3693 /* The following functions are specific to the ELF linker, while
3694 functions above are used generally. Those named ppc64_elf_* are
3695 called by the main ELF linker code. They appear in this file more
3696 or less in the order in which they are called. eg.
3697 ppc64_elf_check_relocs is called early in the link process,
3698 ppc64_elf_finish_dynamic_sections is one of the last functions
3699 called.
3700
3701 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
3702 functions have both a function code symbol and a function descriptor
3703 symbol. A call to foo in a relocatable object file looks like:
3704
3705 . .text
3706 . x:
3707 . bl .foo
3708 . nop
3709
3710 The function definition in another object file might be:
3711
3712 . .section .opd
3713 . foo: .quad .foo
3714 . .quad .TOC.@tocbase
3715 . .quad 0
3716 .
3717 . .text
3718 . .foo: blr
3719
3720 When the linker resolves the call during a static link, the branch
3721 unsurprisingly just goes to .foo and the .opd information is unused.
3722 If the function definition is in a shared library, things are a little
3723 different: The call goes via a plt call stub, the opd information gets
3724 copied to the plt, and the linker patches the nop.
3725
3726 . x:
3727 . bl .foo_stub
3728 . ld 2,40(1)
3729 .
3730 .
3731 . .foo_stub:
3732 . std 2,40(1) # in practice, the call stub
3733 . addis 11,2,Lfoo@toc@ha # is slightly optimized, but
3734 . addi 11,11,Lfoo@toc@l # this is the general idea
3735 . ld 12,0(11)
3736 . ld 2,8(11)
3737 . mtctr 12
3738 . ld 11,16(11)
3739 . bctr
3740 .
3741 . .section .plt
3742 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
3743
3744 The "reloc ()" notation is supposed to indicate that the linker emits
3745 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
3746 copying.
3747
3748 What are the difficulties here? Well, firstly, the relocations
3749 examined by the linker in check_relocs are against the function code
3750 sym .foo, while the dynamic relocation in the plt is emitted against
3751 the function descriptor symbol, foo. Somewhere along the line, we need
3752 to carefully copy dynamic link information from one symbol to the other.
3753 Secondly, the generic part of the elf linker will make .foo a dynamic
3754 symbol as is normal for most other backends. We need foo dynamic
3755 instead, at least for an application final link. However, when
3756 creating a shared library containing foo, we need to have both symbols
3757 dynamic so that references to .foo are satisfied during the early
3758 stages of linking. Otherwise the linker might decide to pull in a
3759 definition from some other object, eg. a static library.
3760
3761 Update: As of August 2004, we support a new convention. Function
3762 calls may use the function descriptor symbol, ie. "bl foo". This
3763 behaves exactly as "bl .foo". */
3764
3765 /* Of those relocs that might be copied as dynamic relocs, this function
3766 selects those that must be copied when linking a shared library,
3767 even when the symbol is local. */
3768
3769 static int
3770 must_be_dyn_reloc (struct bfd_link_info *info,
3771 enum elf_ppc64_reloc_type r_type)
3772 {
3773 switch (r_type)
3774 {
3775 default:
3776 return 1;
3777
3778 case R_PPC64_REL32:
3779 case R_PPC64_REL64:
3780 case R_PPC64_REL30:
3781 return 0;
3782
3783 case R_PPC64_TPREL16:
3784 case R_PPC64_TPREL16_LO:
3785 case R_PPC64_TPREL16_HI:
3786 case R_PPC64_TPREL16_HA:
3787 case R_PPC64_TPREL16_DS:
3788 case R_PPC64_TPREL16_LO_DS:
3789 case R_PPC64_TPREL16_HIGH:
3790 case R_PPC64_TPREL16_HIGHA:
3791 case R_PPC64_TPREL16_HIGHER:
3792 case R_PPC64_TPREL16_HIGHERA:
3793 case R_PPC64_TPREL16_HIGHEST:
3794 case R_PPC64_TPREL16_HIGHESTA:
3795 case R_PPC64_TPREL64:
3796 return !bfd_link_executable (info);
3797 }
3798 }
3799
3800 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3801 copying dynamic variables from a shared lib into an app's dynbss
3802 section, and instead use a dynamic relocation to point into the
3803 shared lib. With code that gcc generates, it's vital that this be
3804 enabled; In the PowerPC64 ABI, the address of a function is actually
3805 the address of a function descriptor, which resides in the .opd
3806 section. gcc uses the descriptor directly rather than going via the
3807 GOT as some other ABI's do, which means that initialized function
3808 pointers must reference the descriptor. Thus, a function pointer
3809 initialized to the address of a function in a shared library will
3810 either require a copy reloc, or a dynamic reloc. Using a copy reloc
3811 redefines the function descriptor symbol to point to the copy. This
3812 presents a problem as a plt entry for that function is also
3813 initialized from the function descriptor symbol and the copy reloc
3814 may not be initialized first. */
3815 #define ELIMINATE_COPY_RELOCS 1
3816
3817 /* Section name for stubs is the associated section name plus this
3818 string. */
3819 #define STUB_SUFFIX ".stub"
3820
3821 /* Linker stubs.
3822 ppc_stub_long_branch:
3823 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
3824 destination, but a 24 bit branch in a stub section will reach.
3825 . b dest
3826
3827 ppc_stub_plt_branch:
3828 Similar to the above, but a 24 bit branch in the stub section won't
3829 reach its destination.
3830 . addis %r11,%r2,xxx@toc@ha
3831 . ld %r12,xxx@toc@l(%r11)
3832 . mtctr %r12
3833 . bctr
3834
3835 ppc_stub_plt_call:
3836 Used to call a function in a shared library. If it so happens that
3837 the plt entry referenced crosses a 64k boundary, then an extra
3838 "addi %r11,%r11,xxx@toc@l" will be inserted before the "mtctr".
3839 . std %r2,40(%r1)
3840 . addis %r11,%r2,xxx@toc@ha
3841 . ld %r12,xxx+0@toc@l(%r11)
3842 . mtctr %r12
3843 . ld %r2,xxx+8@toc@l(%r11)
3844 . ld %r11,xxx+16@toc@l(%r11)
3845 . bctr
3846
3847 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
3848 code to adjust the value and save r2 to support multiple toc sections.
3849 A ppc_stub_long_branch with an r2 offset looks like:
3850 . std %r2,40(%r1)
3851 . addis %r2,%r2,off@ha
3852 . addi %r2,%r2,off@l
3853 . b dest
3854
3855 A ppc_stub_plt_branch with an r2 offset looks like:
3856 . std %r2,40(%r1)
3857 . addis %r11,%r2,xxx@toc@ha
3858 . ld %r12,xxx@toc@l(%r11)
3859 . addis %r2,%r2,off@ha
3860 . addi %r2,%r2,off@l
3861 . mtctr %r12
3862 . bctr
3863
3864 In cases where the "addis" instruction would add zero, the "addis" is
3865 omitted and following instructions modified slightly in some cases.
3866 */
3867
3868 enum ppc_stub_type {
3869 ppc_stub_none,
3870 ppc_stub_long_branch,
3871 ppc_stub_long_branch_r2off,
3872 ppc_stub_plt_branch,
3873 ppc_stub_plt_branch_r2off,
3874 ppc_stub_plt_call,
3875 ppc_stub_plt_call_r2save,
3876 ppc_stub_global_entry,
3877 ppc_stub_save_res
3878 };
3879
3880 /* Information on stub grouping. */
3881 struct map_stub
3882 {
3883 /* The stub section. */
3884 asection *stub_sec;
3885 /* This is the section to which stubs in the group will be attached. */
3886 asection *link_sec;
3887 /* Next group. */
3888 struct map_stub *next;
3889 /* Whether to emit a copy of register save/restore functions in this
3890 group. */
3891 int needs_save_res;
3892 };
3893
3894 struct ppc_stub_hash_entry {
3895
3896 /* Base hash table entry structure. */
3897 struct bfd_hash_entry root;
3898
3899 enum ppc_stub_type stub_type;
3900
3901 /* Group information. */
3902 struct map_stub *group;
3903
3904 /* Offset within stub_sec of the beginning of this stub. */
3905 bfd_vma stub_offset;
3906
3907 /* Given the symbol's value and its section we can determine its final
3908 value when building the stubs (so the stub knows where to jump. */
3909 bfd_vma target_value;
3910 asection *target_section;
3911
3912 /* The symbol table entry, if any, that this was derived from. */
3913 struct ppc_link_hash_entry *h;
3914 struct plt_entry *plt_ent;
3915
3916 /* Symbol st_other. */
3917 unsigned char other;
3918 };
3919
3920 struct ppc_branch_hash_entry {
3921
3922 /* Base hash table entry structure. */
3923 struct bfd_hash_entry root;
3924
3925 /* Offset within branch lookup table. */
3926 unsigned int offset;
3927
3928 /* Generation marker. */
3929 unsigned int iter;
3930 };
3931
3932 /* Used to track dynamic relocations for local symbols. */
3933 struct ppc_dyn_relocs
3934 {
3935 struct ppc_dyn_relocs *next;
3936
3937 /* The input section of the reloc. */
3938 asection *sec;
3939
3940 /* Total number of relocs copied for the input section. */
3941 unsigned int count : 31;
3942
3943 /* Whether this entry is for STT_GNU_IFUNC symbols. */
3944 unsigned int ifunc : 1;
3945 };
3946
3947 struct ppc_link_hash_entry
3948 {
3949 struct elf_link_hash_entry elf;
3950
3951 union {
3952 /* A pointer to the most recently used stub hash entry against this
3953 symbol. */
3954 struct ppc_stub_hash_entry *stub_cache;
3955
3956 /* A pointer to the next symbol starting with a '.' */
3957 struct ppc_link_hash_entry *next_dot_sym;
3958 } u;
3959
3960 /* Track dynamic relocs copied for this symbol. */
3961 struct elf_dyn_relocs *dyn_relocs;
3962
3963 /* Chain of aliases referring to a weakdef. */
3964 struct ppc_link_hash_entry *weakref;
3965
3966 /* Link between function code and descriptor symbols. */
3967 struct ppc_link_hash_entry *oh;
3968
3969 /* Flag function code and descriptor symbols. */
3970 unsigned int is_func:1;
3971 unsigned int is_func_descriptor:1;
3972 unsigned int fake:1;
3973
3974 /* Whether global opd/toc sym has been adjusted or not.
3975 After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
3976 should be set for all globals defined in any opd/toc section. */
3977 unsigned int adjust_done:1;
3978
3979 /* Set if we twiddled this symbol to weak at some stage. */
3980 unsigned int was_undefined:1;
3981
3982 /* Set if this is an out-of-line register save/restore function,
3983 with non-standard calling convention. */
3984 unsigned int save_res:1;
3985
3986 /* Contexts in which symbol is used in the GOT (or TOC).
3987 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
3988 corresponding relocs are encountered during check_relocs.
3989 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3990 indicate the corresponding GOT entry type is not needed.
3991 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
3992 a TPREL one. We use a separate flag rather than setting TPREL
3993 just for convenience in distinguishing the two cases. */
3994 #define TLS_GD 1 /* GD reloc. */
3995 #define TLS_LD 2 /* LD reloc. */
3996 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3997 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3998 #define TLS_TLS 16 /* Any TLS reloc. */
3999 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
4000 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
4001 #define PLT_IFUNC 128 /* STT_GNU_IFUNC. */
4002 unsigned char tls_mask;
4003 };
4004
4005 /* ppc64 ELF linker hash table. */
4006
4007 struct ppc_link_hash_table
4008 {
4009 struct elf_link_hash_table elf;
4010
4011 /* The stub hash table. */
4012 struct bfd_hash_table stub_hash_table;
4013
4014 /* Another hash table for plt_branch stubs. */
4015 struct bfd_hash_table branch_hash_table;
4016
4017 /* Hash table for function prologue tocsave. */
4018 htab_t tocsave_htab;
4019
4020 /* Various options and other info passed from the linker. */
4021 struct ppc64_elf_params *params;
4022
4023 /* The size of sec_info below. */
4024 unsigned int sec_info_arr_size;
4025
4026 /* Per-section array of extra section info. Done this way rather
4027 than as part of ppc64_elf_section_data so we have the info for
4028 non-ppc64 sections. */
4029 struct
4030 {
4031 /* Along with elf_gp, specifies the TOC pointer used by this section. */
4032 bfd_vma toc_off;
4033
4034 union
4035 {
4036 /* The section group that this section belongs to. */
4037 struct map_stub *group;
4038 /* A temp section list pointer. */
4039 asection *list;
4040 } u;
4041 } *sec_info;
4042
4043 /* Linked list of groups. */
4044 struct map_stub *group;
4045
4046 /* Temp used when calculating TOC pointers. */
4047 bfd_vma toc_curr;
4048 bfd *toc_bfd;
4049 asection *toc_first_sec;
4050
4051 /* Used when adding symbols. */
4052 struct ppc_link_hash_entry *dot_syms;
4053
4054 /* Shortcuts to get to dynamic linker sections. */
4055 asection *dynbss;
4056 asection *relbss;
4057 asection *glink;
4058 asection *sfpr;
4059 asection *brlt;
4060 asection *relbrlt;
4061 asection *glink_eh_frame;
4062
4063 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
4064 struct ppc_link_hash_entry *tls_get_addr;
4065 struct ppc_link_hash_entry *tls_get_addr_fd;
4066
4067 /* The size of reliplt used by got entry relocs. */
4068 bfd_size_type got_reli_size;
4069
4070 /* Statistics. */
4071 unsigned long stub_count[ppc_stub_global_entry];
4072
4073 /* Number of stubs against global syms. */
4074 unsigned long stub_globals;
4075
4076 /* Set if we're linking code with function descriptors. */
4077 unsigned int opd_abi:1;
4078
4079 /* Support for multiple toc sections. */
4080 unsigned int do_multi_toc:1;
4081 unsigned int multi_toc_needed:1;
4082 unsigned int second_toc_pass:1;
4083 unsigned int do_toc_opt:1;
4084
4085 /* Set on error. */
4086 unsigned int stub_error:1;
4087
4088 /* Temp used by ppc64_elf_before_check_relocs. */
4089 unsigned int twiddled_syms:1;
4090
4091 /* Incremented every time we size stubs. */
4092 unsigned int stub_iteration;
4093
4094 /* Small local sym cache. */
4095 struct sym_cache sym_cache;
4096 };
4097
4098 /* Rename some of the generic section flags to better document how they
4099 are used here. */
4100
4101 /* Nonzero if this section has TLS related relocations. */
4102 #define has_tls_reloc sec_flg0
4103
4104 /* Nonzero if this section has a call to __tls_get_addr. */
4105 #define has_tls_get_addr_call sec_flg1
4106
4107 /* Nonzero if this section has any toc or got relocs. */
4108 #define has_toc_reloc sec_flg2
4109
4110 /* Nonzero if this section has a call to another section that uses
4111 the toc or got. */
4112 #define makes_toc_func_call sec_flg3
4113
4114 /* Recursion protection when determining above flag. */
4115 #define call_check_in_progress sec_flg4
4116 #define call_check_done sec_flg5
4117
4118 /* Get the ppc64 ELF linker hash table from a link_info structure. */
4119
4120 #define ppc_hash_table(p) \
4121 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
4122 == PPC64_ELF_DATA ? ((struct ppc_link_hash_table *) ((p)->hash)) : NULL)
4123
4124 #define ppc_stub_hash_lookup(table, string, create, copy) \
4125 ((struct ppc_stub_hash_entry *) \
4126 bfd_hash_lookup ((table), (string), (create), (copy)))
4127
4128 #define ppc_branch_hash_lookup(table, string, create, copy) \
4129 ((struct ppc_branch_hash_entry *) \
4130 bfd_hash_lookup ((table), (string), (create), (copy)))
4131
4132 /* Create an entry in the stub hash table. */
4133
4134 static struct bfd_hash_entry *
4135 stub_hash_newfunc (struct bfd_hash_entry *entry,
4136 struct bfd_hash_table *table,
4137 const char *string)
4138 {
4139 /* Allocate the structure if it has not already been allocated by a
4140 subclass. */
4141 if (entry == NULL)
4142 {
4143 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
4144 if (entry == NULL)
4145 return entry;
4146 }
4147
4148 /* Call the allocation method of the superclass. */
4149 entry = bfd_hash_newfunc (entry, table, string);
4150 if (entry != NULL)
4151 {
4152 struct ppc_stub_hash_entry *eh;
4153
4154 /* Initialize the local fields. */
4155 eh = (struct ppc_stub_hash_entry *) entry;
4156 eh->stub_type = ppc_stub_none;
4157 eh->group = NULL;
4158 eh->stub_offset = 0;
4159 eh->target_value = 0;
4160 eh->target_section = NULL;
4161 eh->h = NULL;
4162 eh->plt_ent = NULL;
4163 eh->other = 0;
4164 }
4165
4166 return entry;
4167 }
4168
4169 /* Create an entry in the branch hash table. */
4170
4171 static struct bfd_hash_entry *
4172 branch_hash_newfunc (struct bfd_hash_entry *entry,
4173 struct bfd_hash_table *table,
4174 const char *string)
4175 {
4176 /* Allocate the structure if it has not already been allocated by a
4177 subclass. */
4178 if (entry == NULL)
4179 {
4180 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
4181 if (entry == NULL)
4182 return entry;
4183 }
4184
4185 /* Call the allocation method of the superclass. */
4186 entry = bfd_hash_newfunc (entry, table, string);
4187 if (entry != NULL)
4188 {
4189 struct ppc_branch_hash_entry *eh;
4190
4191 /* Initialize the local fields. */
4192 eh = (struct ppc_branch_hash_entry *) entry;
4193 eh->offset = 0;
4194 eh->iter = 0;
4195 }
4196
4197 return entry;
4198 }
4199
4200 /* Create an entry in a ppc64 ELF linker hash table. */
4201
4202 static struct bfd_hash_entry *
4203 link_hash_newfunc (struct bfd_hash_entry *entry,
4204 struct bfd_hash_table *table,
4205 const char *string)
4206 {
4207 /* Allocate the structure if it has not already been allocated by a
4208 subclass. */
4209 if (entry == NULL)
4210 {
4211 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
4212 if (entry == NULL)
4213 return entry;
4214 }
4215
4216 /* Call the allocation method of the superclass. */
4217 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
4218 if (entry != NULL)
4219 {
4220 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
4221
4222 memset (&eh->u.stub_cache, 0,
4223 (sizeof (struct ppc_link_hash_entry)
4224 - offsetof (struct ppc_link_hash_entry, u.stub_cache)));
4225
4226 /* When making function calls, old ABI code references function entry
4227 points (dot symbols), while new ABI code references the function
4228 descriptor symbol. We need to make any combination of reference and
4229 definition work together, without breaking archive linking.
4230
4231 For a defined function "foo" and an undefined call to "bar":
4232 An old object defines "foo" and ".foo", references ".bar" (possibly
4233 "bar" too).
4234 A new object defines "foo" and references "bar".
4235
4236 A new object thus has no problem with its undefined symbols being
4237 satisfied by definitions in an old object. On the other hand, the
4238 old object won't have ".bar" satisfied by a new object.
4239
4240 Keep a list of newly added dot-symbols. */
4241
4242 if (string[0] == '.')
4243 {
4244 struct ppc_link_hash_table *htab;
4245
4246 htab = (struct ppc_link_hash_table *) table;
4247 eh->u.next_dot_sym = htab->dot_syms;
4248 htab->dot_syms = eh;
4249 }
4250 }
4251
4252 return entry;
4253 }
4254
4255 struct tocsave_entry {
4256 asection *sec;
4257 bfd_vma offset;
4258 };
4259
4260 static hashval_t
4261 tocsave_htab_hash (const void *p)
4262 {
4263 const struct tocsave_entry *e = (const struct tocsave_entry *) p;
4264 return ((bfd_vma)(intptr_t) e->sec ^ e->offset) >> 3;
4265 }
4266
4267 static int
4268 tocsave_htab_eq (const void *p1, const void *p2)
4269 {
4270 const struct tocsave_entry *e1 = (const struct tocsave_entry *) p1;
4271 const struct tocsave_entry *e2 = (const struct tocsave_entry *) p2;
4272 return e1->sec == e2->sec && e1->offset == e2->offset;
4273 }
4274
4275 /* Destroy a ppc64 ELF linker hash table. */
4276
4277 static void
4278 ppc64_elf_link_hash_table_free (bfd *obfd)
4279 {
4280 struct ppc_link_hash_table *htab;
4281
4282 htab = (struct ppc_link_hash_table *) obfd->link.hash;
4283 if (htab->tocsave_htab)
4284 htab_delete (htab->tocsave_htab);
4285 bfd_hash_table_free (&htab->branch_hash_table);
4286 bfd_hash_table_free (&htab->stub_hash_table);
4287 _bfd_elf_link_hash_table_free (obfd);
4288 }
4289
4290 /* Create a ppc64 ELF linker hash table. */
4291
4292 static struct bfd_link_hash_table *
4293 ppc64_elf_link_hash_table_create (bfd *abfd)
4294 {
4295 struct ppc_link_hash_table *htab;
4296 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
4297
4298 htab = bfd_zmalloc (amt);
4299 if (htab == NULL)
4300 return NULL;
4301
4302 if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc,
4303 sizeof (struct ppc_link_hash_entry),
4304 PPC64_ELF_DATA))
4305 {
4306 free (htab);
4307 return NULL;
4308 }
4309
4310 /* Init the stub hash table too. */
4311 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc,
4312 sizeof (struct ppc_stub_hash_entry)))
4313 {
4314 _bfd_elf_link_hash_table_free (abfd);
4315 return NULL;
4316 }
4317
4318 /* And the branch hash table. */
4319 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc,
4320 sizeof (struct ppc_branch_hash_entry)))
4321 {
4322 bfd_hash_table_free (&htab->stub_hash_table);
4323 _bfd_elf_link_hash_table_free (abfd);
4324 return NULL;
4325 }
4326
4327 htab->tocsave_htab = htab_try_create (1024,
4328 tocsave_htab_hash,
4329 tocsave_htab_eq,
4330 NULL);
4331 if (htab->tocsave_htab == NULL)
4332 {
4333 ppc64_elf_link_hash_table_free (abfd);
4334 return NULL;
4335 }
4336 htab->elf.root.hash_table_free = ppc64_elf_link_hash_table_free;
4337
4338 /* Initializing two fields of the union is just cosmetic. We really
4339 only care about glist, but when compiled on a 32-bit host the
4340 bfd_vma fields are larger. Setting the bfd_vma to zero makes
4341 debugger inspection of these fields look nicer. */
4342 htab->elf.init_got_refcount.refcount = 0;
4343 htab->elf.init_got_refcount.glist = NULL;
4344 htab->elf.init_plt_refcount.refcount = 0;
4345 htab->elf.init_plt_refcount.glist = NULL;
4346 htab->elf.init_got_offset.offset = 0;
4347 htab->elf.init_got_offset.glist = NULL;
4348 htab->elf.init_plt_offset.offset = 0;
4349 htab->elf.init_plt_offset.glist = NULL;
4350
4351 return &htab->elf.root;
4352 }
4353
4354 /* Create sections for linker generated code. */
4355
4356 static bfd_boolean
4357 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
4358 {
4359 struct ppc_link_hash_table *htab;
4360 flagword flags;
4361
4362 htab = ppc_hash_table (info);
4363
4364 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
4365 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4366 if (htab->params->save_restore_funcs)
4367 {
4368 /* Create .sfpr for code to save and restore fp regs. */
4369 htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr",
4370 flags);
4371 if (htab->sfpr == NULL
4372 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
4373 return FALSE;
4374 }
4375
4376 if (bfd_link_relocatable (info))
4377 return TRUE;
4378
4379 /* Create .glink for lazy dynamic linking support. */
4380 htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink",
4381 flags);
4382 if (htab->glink == NULL
4383 || ! bfd_set_section_alignment (dynobj, htab->glink, 3))
4384 return FALSE;
4385
4386 if (!info->no_ld_generated_unwind_info)
4387 {
4388 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
4389 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4390 htab->glink_eh_frame = bfd_make_section_anyway_with_flags (dynobj,
4391 ".eh_frame",
4392 flags);
4393 if (htab->glink_eh_frame == NULL
4394 || !bfd_set_section_alignment (dynobj, htab->glink_eh_frame, 2))
4395 return FALSE;
4396 }
4397
4398 flags = SEC_ALLOC | SEC_LINKER_CREATED;
4399 htab->elf.iplt = bfd_make_section_anyway_with_flags (dynobj, ".iplt", flags);
4400 if (htab->elf.iplt == NULL
4401 || ! bfd_set_section_alignment (dynobj, htab->elf.iplt, 3))
4402 return FALSE;
4403
4404 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4405 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4406 htab->elf.irelplt
4407 = bfd_make_section_anyway_with_flags (dynobj, ".rela.iplt", flags);
4408 if (htab->elf.irelplt == NULL
4409 || ! bfd_set_section_alignment (dynobj, htab->elf.irelplt, 3))
4410 return FALSE;
4411
4412 /* Create branch lookup table for plt_branch stubs. */
4413 flags = (SEC_ALLOC | SEC_LOAD
4414 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4415 htab->brlt = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt",
4416 flags);
4417 if (htab->brlt == NULL
4418 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
4419 return FALSE;
4420
4421 if (!bfd_link_pic (info))
4422 return TRUE;
4423
4424 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4425 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4426 htab->relbrlt = bfd_make_section_anyway_with_flags (dynobj,
4427 ".rela.branch_lt",
4428 flags);
4429 if (htab->relbrlt == NULL
4430 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
4431 return FALSE;
4432
4433 return TRUE;
4434 }
4435
4436 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
4437
4438 bfd_boolean
4439 ppc64_elf_init_stub_bfd (struct bfd_link_info *info,
4440 struct ppc64_elf_params *params)
4441 {
4442 struct ppc_link_hash_table *htab;
4443
4444 elf_elfheader (params->stub_bfd)->e_ident[EI_CLASS] = ELFCLASS64;
4445
4446 /* Always hook our dynamic sections into the first bfd, which is the
4447 linker created stub bfd. This ensures that the GOT header is at
4448 the start of the output TOC section. */
4449 htab = ppc_hash_table (info);
4450 htab->elf.dynobj = params->stub_bfd;
4451 htab->params = params;
4452
4453 return create_linkage_sections (htab->elf.dynobj, info);
4454 }
4455
4456 /* Build a name for an entry in the stub hash table. */
4457
4458 static char *
4459 ppc_stub_name (const asection *input_section,
4460 const asection *sym_sec,
4461 const struct ppc_link_hash_entry *h,
4462 const Elf_Internal_Rela *rel)
4463 {
4464 char *stub_name;
4465 ssize_t len;
4466
4467 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
4468 offsets from a sym as a branch target? In fact, we could
4469 probably assume the addend is always zero. */
4470 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
4471
4472 if (h)
4473 {
4474 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
4475 stub_name = bfd_malloc (len);
4476 if (stub_name == NULL)
4477 return stub_name;
4478
4479 len = sprintf (stub_name, "%08x.%s+%x",
4480 input_section->id & 0xffffffff,
4481 h->elf.root.root.string,
4482 (int) rel->r_addend & 0xffffffff);
4483 }
4484 else
4485 {
4486 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
4487 stub_name = bfd_malloc (len);
4488 if (stub_name == NULL)
4489 return stub_name;
4490
4491 len = sprintf (stub_name, "%08x.%x:%x+%x",
4492 input_section->id & 0xffffffff,
4493 sym_sec->id & 0xffffffff,
4494 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
4495 (int) rel->r_addend & 0xffffffff);
4496 }
4497 if (len > 2 && stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
4498 stub_name[len - 2] = 0;
4499 return stub_name;
4500 }
4501
4502 /* Look up an entry in the stub hash. Stub entries are cached because
4503 creating the stub name takes a bit of time. */
4504
4505 static struct ppc_stub_hash_entry *
4506 ppc_get_stub_entry (const asection *input_section,
4507 const asection *sym_sec,
4508 struct ppc_link_hash_entry *h,
4509 const Elf_Internal_Rela *rel,
4510 struct ppc_link_hash_table *htab)
4511 {
4512 struct ppc_stub_hash_entry *stub_entry;
4513 struct map_stub *group;
4514
4515 /* If this input section is part of a group of sections sharing one
4516 stub section, then use the id of the first section in the group.
4517 Stub names need to include a section id, as there may well be
4518 more than one stub used to reach say, printf, and we need to
4519 distinguish between them. */
4520 group = htab->sec_info[input_section->id].u.group;
4521 if (group == NULL)
4522 return NULL;
4523
4524 if (h != NULL && h->u.stub_cache != NULL
4525 && h->u.stub_cache->h == h
4526 && h->u.stub_cache->group == group)
4527 {
4528 stub_entry = h->u.stub_cache;
4529 }
4530 else
4531 {
4532 char *stub_name;
4533
4534 stub_name = ppc_stub_name (group->link_sec, sym_sec, h, rel);
4535 if (stub_name == NULL)
4536 return NULL;
4537
4538 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
4539 stub_name, FALSE, FALSE);
4540 if (h != NULL)
4541 h->u.stub_cache = stub_entry;
4542
4543 free (stub_name);
4544 }
4545
4546 return stub_entry;
4547 }
4548
4549 /* Add a new stub entry to the stub hash. Not all fields of the new
4550 stub entry are initialised. */
4551
4552 static struct ppc_stub_hash_entry *
4553 ppc_add_stub (const char *stub_name,
4554 asection *section,
4555 struct bfd_link_info *info)
4556 {
4557 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4558 struct map_stub *group;
4559 asection *link_sec;
4560 asection *stub_sec;
4561 struct ppc_stub_hash_entry *stub_entry;
4562
4563 group = htab->sec_info[section->id].u.group;
4564 link_sec = group->link_sec;
4565 stub_sec = group->stub_sec;
4566 if (stub_sec == NULL)
4567 {
4568 size_t namelen;
4569 bfd_size_type len;
4570 char *s_name;
4571
4572 namelen = strlen (link_sec->name);
4573 len = namelen + sizeof (STUB_SUFFIX);
4574 s_name = bfd_alloc (htab->params->stub_bfd, len);
4575 if (s_name == NULL)
4576 return NULL;
4577
4578 memcpy (s_name, link_sec->name, namelen);
4579 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
4580 stub_sec = (*htab->params->add_stub_section) (s_name, link_sec);
4581 if (stub_sec == NULL)
4582 return NULL;
4583 group->stub_sec = stub_sec;
4584 }
4585
4586 /* Enter this entry into the linker stub hash table. */
4587 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
4588 TRUE, FALSE);
4589 if (stub_entry == NULL)
4590 {
4591 info->callbacks->einfo (_("%P: %B: cannot create stub entry %s\n"),
4592 section->owner, stub_name);
4593 return NULL;
4594 }
4595
4596 stub_entry->group = group;
4597 stub_entry->stub_offset = 0;
4598 return stub_entry;
4599 }
4600
4601 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
4602 not already done. */
4603
4604 static bfd_boolean
4605 create_got_section (bfd *abfd, struct bfd_link_info *info)
4606 {
4607 asection *got, *relgot;
4608 flagword flags;
4609 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4610
4611 if (!is_ppc64_elf (abfd))
4612 return FALSE;
4613 if (htab == NULL)
4614 return FALSE;
4615
4616 if (!htab->elf.sgot
4617 && !_bfd_elf_create_got_section (htab->elf.dynobj, info))
4618 return FALSE;
4619
4620 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
4621 | SEC_LINKER_CREATED);
4622
4623 got = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
4624 if (!got
4625 || !bfd_set_section_alignment (abfd, got, 3))
4626 return FALSE;
4627
4628 relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got",
4629 flags | SEC_READONLY);
4630 if (!relgot
4631 || ! bfd_set_section_alignment (abfd, relgot, 3))
4632 return FALSE;
4633
4634 ppc64_elf_tdata (abfd)->got = got;
4635 ppc64_elf_tdata (abfd)->relgot = relgot;
4636 return TRUE;
4637 }
4638
4639 /* Create the dynamic sections, and set up shortcuts. */
4640
4641 static bfd_boolean
4642 ppc64_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
4643 {
4644 struct ppc_link_hash_table *htab;
4645
4646 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
4647 return FALSE;
4648
4649 htab = ppc_hash_table (info);
4650 if (htab == NULL)
4651 return FALSE;
4652
4653 htab->dynbss = bfd_get_linker_section (dynobj, ".dynbss");
4654 if (!bfd_link_pic (info))
4655 htab->relbss = bfd_get_linker_section (dynobj, ".rela.bss");
4656
4657 if (!htab->elf.sgot || !htab->elf.splt || !htab->elf.srelplt || !htab->dynbss
4658 || (!bfd_link_pic (info) && !htab->relbss))
4659 abort ();
4660
4661 return TRUE;
4662 }
4663
4664 /* Follow indirect and warning symbol links. */
4665
4666 static inline struct bfd_link_hash_entry *
4667 follow_link (struct bfd_link_hash_entry *h)
4668 {
4669 while (h->type == bfd_link_hash_indirect
4670 || h->type == bfd_link_hash_warning)
4671 h = h->u.i.link;
4672 return h;
4673 }
4674
4675 static inline struct elf_link_hash_entry *
4676 elf_follow_link (struct elf_link_hash_entry *h)
4677 {
4678 return (struct elf_link_hash_entry *) follow_link (&h->root);
4679 }
4680
4681 static inline struct ppc_link_hash_entry *
4682 ppc_follow_link (struct ppc_link_hash_entry *h)
4683 {
4684 return (struct ppc_link_hash_entry *) follow_link (&h->elf.root);
4685 }
4686
4687 /* Merge PLT info on FROM with that on TO. */
4688
4689 static void
4690 move_plt_plist (struct ppc_link_hash_entry *from,
4691 struct ppc_link_hash_entry *to)
4692 {
4693 if (from->elf.plt.plist != NULL)
4694 {
4695 if (to->elf.plt.plist != NULL)
4696 {
4697 struct plt_entry **entp;
4698 struct plt_entry *ent;
4699
4700 for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; )
4701 {
4702 struct plt_entry *dent;
4703
4704 for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next)
4705 if (dent->addend == ent->addend)
4706 {
4707 dent->plt.refcount += ent->plt.refcount;
4708 *entp = ent->next;
4709 break;
4710 }
4711 if (dent == NULL)
4712 entp = &ent->next;
4713 }
4714 *entp = to->elf.plt.plist;
4715 }
4716
4717 to->elf.plt.plist = from->elf.plt.plist;
4718 from->elf.plt.plist = NULL;
4719 }
4720 }
4721
4722 /* Copy the extra info we tack onto an elf_link_hash_entry. */
4723
4724 static void
4725 ppc64_elf_copy_indirect_symbol (struct bfd_link_info *info,
4726 struct elf_link_hash_entry *dir,
4727 struct elf_link_hash_entry *ind)
4728 {
4729 struct ppc_link_hash_entry *edir, *eind;
4730
4731 edir = (struct ppc_link_hash_entry *) dir;
4732 eind = (struct ppc_link_hash_entry *) ind;
4733
4734 edir->is_func |= eind->is_func;
4735 edir->is_func_descriptor |= eind->is_func_descriptor;
4736 edir->tls_mask |= eind->tls_mask;
4737 if (eind->oh != NULL)
4738 edir->oh = ppc_follow_link (eind->oh);
4739
4740 /* If called to transfer flags for a weakdef during processing
4741 of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF.
4742 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
4743 if (!(ELIMINATE_COPY_RELOCS
4744 && eind->elf.root.type != bfd_link_hash_indirect
4745 && edir->elf.dynamic_adjusted))
4746 edir->elf.non_got_ref |= eind->elf.non_got_ref;
4747
4748 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
4749 edir->elf.ref_regular |= eind->elf.ref_regular;
4750 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
4751 edir->elf.needs_plt |= eind->elf.needs_plt;
4752 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed;
4753
4754 /* If we were called to copy over info for a weak sym, don't copy
4755 dyn_relocs, plt/got info, or dynindx. We used to copy dyn_relocs
4756 in order to simplify readonly_dynrelocs and save a field in the
4757 symbol hash entry, but that means dyn_relocs can't be used in any
4758 tests about a specific symbol, or affect other symbol flags which
4759 are then tested.
4760 Chain weakdefs so we can get from the weakdef back to an alias.
4761 The list is circular so that we don't need to use u.weakdef as
4762 well as this list to look at all aliases. */
4763 if (eind->elf.root.type != bfd_link_hash_indirect)
4764 {
4765 struct ppc_link_hash_entry *cur, *add, *next;
4766
4767 add = eind;
4768 do
4769 {
4770 cur = edir->weakref;
4771 if (cur != NULL)
4772 {
4773 do
4774 {
4775 /* We can be called twice for the same symbols.
4776 Don't make multiple loops. */
4777 if (cur == add)
4778 return;
4779 cur = cur->weakref;
4780 } while (cur != edir);
4781 }
4782 next = add->weakref;
4783 if (cur != add)
4784 {
4785 add->weakref = edir->weakref != NULL ? edir->weakref : edir;
4786 edir->weakref = add;
4787 }
4788 add = next;
4789 } while (add != NULL && add != eind);
4790 return;
4791 }
4792
4793 /* Copy over any dynamic relocs we may have on the indirect sym. */
4794 if (eind->dyn_relocs != NULL)
4795 {
4796 if (edir->dyn_relocs != NULL)
4797 {
4798 struct elf_dyn_relocs **pp;
4799 struct elf_dyn_relocs *p;
4800
4801 /* Add reloc counts against the indirect sym to the direct sym
4802 list. Merge any entries against the same section. */
4803 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
4804 {
4805 struct elf_dyn_relocs *q;
4806
4807 for (q = edir->dyn_relocs; q != NULL; q = q->next)
4808 if (q->sec == p->sec)
4809 {
4810 q->pc_count += p->pc_count;
4811 q->count += p->count;
4812 *pp = p->next;
4813 break;
4814 }
4815 if (q == NULL)
4816 pp = &p->next;
4817 }
4818 *pp = edir->dyn_relocs;
4819 }
4820
4821 edir->dyn_relocs = eind->dyn_relocs;
4822 eind->dyn_relocs = NULL;
4823 }
4824
4825 /* Copy over got entries that we may have already seen to the
4826 symbol which just became indirect. */
4827 if (eind->elf.got.glist != NULL)
4828 {
4829 if (edir->elf.got.glist != NULL)
4830 {
4831 struct got_entry **entp;
4832 struct got_entry *ent;
4833
4834 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
4835 {
4836 struct got_entry *dent;
4837
4838 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
4839 if (dent->addend == ent->addend
4840 && dent->owner == ent->owner
4841 && dent->tls_type == ent->tls_type)
4842 {
4843 dent->got.refcount += ent->got.refcount;
4844 *entp = ent->next;
4845 break;
4846 }
4847 if (dent == NULL)
4848 entp = &ent->next;
4849 }
4850 *entp = edir->elf.got.glist;
4851 }
4852
4853 edir->elf.got.glist = eind->elf.got.glist;
4854 eind->elf.got.glist = NULL;
4855 }
4856
4857 /* And plt entries. */
4858 move_plt_plist (eind, edir);
4859
4860 if (eind->elf.dynindx != -1)
4861 {
4862 if (edir->elf.dynindx != -1)
4863 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4864 edir->elf.dynstr_index);
4865 edir->elf.dynindx = eind->elf.dynindx;
4866 edir->elf.dynstr_index = eind->elf.dynstr_index;
4867 eind->elf.dynindx = -1;
4868 eind->elf.dynstr_index = 0;
4869 }
4870 }
4871
4872 /* Find the function descriptor hash entry from the given function code
4873 hash entry FH. Link the entries via their OH fields. */
4874
4875 static struct ppc_link_hash_entry *
4876 lookup_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
4877 {
4878 struct ppc_link_hash_entry *fdh = fh->oh;
4879
4880 if (fdh == NULL)
4881 {
4882 const char *fd_name = fh->elf.root.root.string + 1;
4883
4884 fdh = (struct ppc_link_hash_entry *)
4885 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
4886 if (fdh == NULL)
4887 return fdh;
4888
4889 fdh->is_func_descriptor = 1;
4890 fdh->oh = fh;
4891 fh->is_func = 1;
4892 fh->oh = fdh;
4893 }
4894
4895 return ppc_follow_link (fdh);
4896 }
4897
4898 /* Make a fake function descriptor sym for the code sym FH. */
4899
4900 static struct ppc_link_hash_entry *
4901 make_fdh (struct bfd_link_info *info,
4902 struct ppc_link_hash_entry *fh)
4903 {
4904 bfd *abfd;
4905 asymbol *newsym;
4906 struct bfd_link_hash_entry *bh;
4907 struct ppc_link_hash_entry *fdh;
4908
4909 abfd = fh->elf.root.u.undef.abfd;
4910 newsym = bfd_make_empty_symbol (abfd);
4911 newsym->name = fh->elf.root.root.string + 1;
4912 newsym->section = bfd_und_section_ptr;
4913 newsym->value = 0;
4914 newsym->flags = BSF_WEAK;
4915
4916 bh = NULL;
4917 if (!_bfd_generic_link_add_one_symbol (info, abfd, newsym->name,
4918 newsym->flags, newsym->section,
4919 newsym->value, NULL, FALSE, FALSE,
4920 &bh))
4921 return NULL;
4922
4923 fdh = (struct ppc_link_hash_entry *) bh;
4924 fdh->elf.non_elf = 0;
4925 fdh->fake = 1;
4926 fdh->is_func_descriptor = 1;
4927 fdh->oh = fh;
4928 fh->is_func = 1;
4929 fh->oh = fdh;
4930 return fdh;
4931 }
4932
4933 /* Fix function descriptor symbols defined in .opd sections to be
4934 function type. */
4935
4936 static bfd_boolean
4937 ppc64_elf_add_symbol_hook (bfd *ibfd,
4938 struct bfd_link_info *info,
4939 Elf_Internal_Sym *isym,
4940 const char **name,
4941 flagword *flags ATTRIBUTE_UNUSED,
4942 asection **sec,
4943 bfd_vma *value)
4944 {
4945 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC
4946 && (ibfd->flags & DYNAMIC) == 0
4947 && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour)
4948 elf_tdata (info->output_bfd)->has_gnu_symbols |= elf_gnu_symbol_ifunc;
4949
4950 if (*sec != NULL
4951 && strcmp ((*sec)->name, ".opd") == 0)
4952 {
4953 asection *code_sec;
4954
4955 if (!(ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC
4956 || ELF_ST_TYPE (isym->st_info) == STT_FUNC))
4957 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
4958
4959 /* If the symbol is a function defined in .opd, and the function
4960 code is in a discarded group, let it appear to be undefined. */
4961 if (!bfd_link_relocatable (info)
4962 && (*sec)->reloc_count != 0
4963 && opd_entry_value (*sec, *value, &code_sec, NULL,
4964 FALSE) != (bfd_vma) -1
4965 && discarded_section (code_sec))
4966 {
4967 *sec = bfd_und_section_ptr;
4968 isym->st_shndx = SHN_UNDEF;
4969 }
4970 }
4971 else if (*sec != NULL
4972 && strcmp ((*sec)->name, ".toc") == 0
4973 && ELF_ST_TYPE (isym->st_info) == STT_OBJECT)
4974 {
4975 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4976 if (htab != NULL)
4977 htab->params->object_in_toc = 1;
4978 }
4979
4980 if ((STO_PPC64_LOCAL_MASK & isym->st_other) != 0)
4981 {
4982 if (abiversion (ibfd) == 0)
4983 set_abiversion (ibfd, 2);
4984 else if (abiversion (ibfd) == 1)
4985 {
4986 info->callbacks->einfo (_("%P: symbol '%s' has invalid st_other"
4987 " for ABI version 1\n"), name);
4988 bfd_set_error (bfd_error_bad_value);
4989 return FALSE;
4990 }
4991 }
4992
4993 return TRUE;
4994 }
4995
4996 /* Merge non-visibility st_other attributes: local entry point. */
4997
4998 static void
4999 ppc64_elf_merge_symbol_attribute (struct elf_link_hash_entry *h,
5000 const Elf_Internal_Sym *isym,
5001 bfd_boolean definition,
5002 bfd_boolean dynamic)
5003 {
5004 if (definition && !dynamic)
5005 h->other = ((isym->st_other & ~ELF_ST_VISIBILITY (-1))
5006 | ELF_ST_VISIBILITY (h->other));
5007 }
5008
5009 /* This function makes an old ABI object reference to ".bar" cause the
5010 inclusion of a new ABI object archive that defines "bar".
5011 NAME is a symbol defined in an archive. Return a symbol in the hash
5012 table that might be satisfied by the archive symbols. */
5013
5014 static struct elf_link_hash_entry *
5015 ppc64_elf_archive_symbol_lookup (bfd *abfd,
5016 struct bfd_link_info *info,
5017 const char *name)
5018 {
5019 struct elf_link_hash_entry *h;
5020 char *dot_name;
5021 size_t len;
5022
5023 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
5024 if (h != NULL
5025 /* Don't return this sym if it is a fake function descriptor
5026 created by add_symbol_adjust. */
5027 && !(h->root.type == bfd_link_hash_undefweak
5028 && ((struct ppc_link_hash_entry *) h)->fake))
5029 return h;
5030
5031 if (name[0] == '.')
5032 return h;
5033
5034 len = strlen (name);
5035 dot_name = bfd_alloc (abfd, len + 2);
5036 if (dot_name == NULL)
5037 return (struct elf_link_hash_entry *) 0 - 1;
5038 dot_name[0] = '.';
5039 memcpy (dot_name + 1, name, len + 1);
5040 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
5041 bfd_release (abfd, dot_name);
5042 return h;
5043 }
5044
5045 /* This function satisfies all old ABI object references to ".bar" if a
5046 new ABI object defines "bar". Well, at least, undefined dot symbols
5047 are made weak. This stops later archive searches from including an
5048 object if we already have a function descriptor definition. It also
5049 prevents the linker complaining about undefined symbols.
5050 We also check and correct mismatched symbol visibility here. The
5051 most restrictive visibility of the function descriptor and the
5052 function entry symbol is used. */
5053
5054 static bfd_boolean
5055 add_symbol_adjust (struct ppc_link_hash_entry *eh, struct bfd_link_info *info)
5056 {
5057 struct ppc_link_hash_table *htab;
5058 struct ppc_link_hash_entry *fdh;
5059
5060 if (eh->elf.root.type == bfd_link_hash_indirect)
5061 return TRUE;
5062
5063 if (eh->elf.root.type == bfd_link_hash_warning)
5064 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
5065
5066 if (eh->elf.root.root.string[0] != '.')
5067 abort ();
5068
5069 htab = ppc_hash_table (info);
5070 if (htab == NULL)
5071 return FALSE;
5072
5073 fdh = lookup_fdh (eh, htab);
5074 if (fdh == NULL)
5075 {
5076 if (!bfd_link_relocatable (info)
5077 && (eh->elf.root.type == bfd_link_hash_undefined
5078 || eh->elf.root.type == bfd_link_hash_undefweak)
5079 && eh->elf.ref_regular)
5080 {
5081 /* Make an undefweak function descriptor sym, which is enough to
5082 pull in an --as-needed shared lib, but won't cause link
5083 errors. Archives are handled elsewhere. */
5084 fdh = make_fdh (info, eh);
5085 if (fdh == NULL)
5086 return FALSE;
5087 fdh->elf.ref_regular = 1;
5088 }
5089 }
5090 else
5091 {
5092 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
5093 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
5094 if (entry_vis < descr_vis)
5095 fdh->elf.other += entry_vis - descr_vis;
5096 else if (entry_vis > descr_vis)
5097 eh->elf.other += descr_vis - entry_vis;
5098
5099 if ((fdh->elf.root.type == bfd_link_hash_defined
5100 || fdh->elf.root.type == bfd_link_hash_defweak)
5101 && eh->elf.root.type == bfd_link_hash_undefined)
5102 {
5103 eh->elf.root.type = bfd_link_hash_undefweak;
5104 eh->was_undefined = 1;
5105 htab->twiddled_syms = 1;
5106 }
5107 }
5108
5109 return TRUE;
5110 }
5111
5112 /* Set up opd section info and abiversion for IBFD, and process list
5113 of dot-symbols we made in link_hash_newfunc. */
5114
5115 static bfd_boolean
5116 ppc64_elf_before_check_relocs (bfd *ibfd, struct bfd_link_info *info)
5117 {
5118 struct ppc_link_hash_table *htab;
5119 struct ppc_link_hash_entry **p, *eh;
5120 asection *opd = bfd_get_section_by_name (ibfd, ".opd");
5121
5122 if (opd != NULL && opd->size != 0)
5123 {
5124 if (abiversion (ibfd) == 0)
5125 set_abiversion (ibfd, 1);
5126 else if (abiversion (ibfd) >= 2)
5127 {
5128 info->callbacks->einfo (_("%P: %B .opd not allowed in ABI"
5129 " version %d\n"),
5130 ibfd, abiversion (ibfd));
5131 bfd_set_error (bfd_error_bad_value);
5132 return FALSE;
5133 }
5134
5135 if ((ibfd->flags & DYNAMIC) == 0
5136 && (opd->flags & SEC_RELOC) != 0
5137 && opd->reloc_count != 0
5138 && !bfd_is_abs_section (opd->output_section))
5139 {
5140 /* Garbage collection needs some extra help with .opd sections.
5141 We don't want to necessarily keep everything referenced by
5142 relocs in .opd, as that would keep all functions. Instead,
5143 if we reference an .opd symbol (a function descriptor), we
5144 want to keep the function code symbol's section. This is
5145 easy for global symbols, but for local syms we need to keep
5146 information about the associated function section. */
5147 bfd_size_type amt;
5148 asection **opd_sym_map;
5149
5150 amt = OPD_NDX (opd->size) * sizeof (*opd_sym_map);
5151 opd_sym_map = bfd_zalloc (ibfd, amt);
5152 if (opd_sym_map == NULL)
5153 return FALSE;
5154 ppc64_elf_section_data (opd)->u.opd.func_sec = opd_sym_map;
5155 BFD_ASSERT (ppc64_elf_section_data (opd)->sec_type == sec_normal);
5156 ppc64_elf_section_data (opd)->sec_type = sec_opd;
5157 }
5158 }
5159
5160 if (!is_ppc64_elf (info->output_bfd))
5161 return TRUE;
5162 htab = ppc_hash_table (info);
5163 if (htab == NULL)
5164 return FALSE;
5165
5166 /* For input files without an explicit abiversion in e_flags
5167 we should have flagged any with symbol st_other bits set
5168 as ELFv1 and above flagged those with .opd as ELFv2.
5169 Set the output abiversion if not yet set, and for any input
5170 still ambiguous, take its abiversion from the output.
5171 Differences in ABI are reported later. */
5172 if (abiversion (info->output_bfd) == 0)
5173 set_abiversion (info->output_bfd, abiversion (ibfd));
5174 else if (abiversion (ibfd) == 0)
5175 set_abiversion (ibfd, abiversion (info->output_bfd));
5176
5177 p = &htab->dot_syms;
5178 while ((eh = *p) != NULL)
5179 {
5180 *p = NULL;
5181 if (&eh->elf == htab->elf.hgot)
5182 ;
5183 else if (htab->elf.hgot == NULL
5184 && strcmp (eh->elf.root.root.string, ".TOC.") == 0)
5185 htab->elf.hgot = &eh->elf;
5186 else if (!add_symbol_adjust (eh, info))
5187 return FALSE;
5188 p = &eh->u.next_dot_sym;
5189 }
5190
5191 /* Clear the list for non-ppc64 input files. */
5192 p = &htab->dot_syms;
5193 while ((eh = *p) != NULL)
5194 {
5195 *p = NULL;
5196 p = &eh->u.next_dot_sym;
5197 }
5198
5199 /* We need to fix the undefs list for any syms we have twiddled to
5200 undefweak. */
5201 if (htab->twiddled_syms)
5202 {
5203 bfd_link_repair_undef_list (&htab->elf.root);
5204 htab->twiddled_syms = 0;
5205 }
5206 return TRUE;
5207 }
5208
5209 /* Undo hash table changes when an --as-needed input file is determined
5210 not to be needed. */
5211
5212 static bfd_boolean
5213 ppc64_elf_notice_as_needed (bfd *ibfd,
5214 struct bfd_link_info *info,
5215 enum notice_asneeded_action act)
5216 {
5217 if (act == notice_not_needed)
5218 {
5219 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5220
5221 if (htab == NULL)
5222 return FALSE;
5223
5224 htab->dot_syms = NULL;
5225 }
5226 return _bfd_elf_notice_as_needed (ibfd, info, act);
5227 }
5228
5229 /* If --just-symbols against a final linked binary, then assume we need
5230 toc adjusting stubs when calling functions defined there. */
5231
5232 static void
5233 ppc64_elf_link_just_syms (asection *sec, struct bfd_link_info *info)
5234 {
5235 if ((sec->flags & SEC_CODE) != 0
5236 && (sec->owner->flags & (EXEC_P | DYNAMIC)) != 0
5237 && is_ppc64_elf (sec->owner))
5238 {
5239 if (abiversion (sec->owner) >= 2
5240 || bfd_get_section_by_name (sec->owner, ".opd") != NULL)
5241 sec->has_toc_reloc = 1;
5242 }
5243 _bfd_elf_link_just_syms (sec, info);
5244 }
5245
5246 static struct plt_entry **
5247 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
5248 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
5249 {
5250 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
5251 struct plt_entry **local_plt;
5252 unsigned char *local_got_tls_masks;
5253
5254 if (local_got_ents == NULL)
5255 {
5256 bfd_size_type size = symtab_hdr->sh_info;
5257
5258 size *= (sizeof (*local_got_ents)
5259 + sizeof (*local_plt)
5260 + sizeof (*local_got_tls_masks));
5261 local_got_ents = bfd_zalloc (abfd, size);
5262 if (local_got_ents == NULL)
5263 return NULL;
5264 elf_local_got_ents (abfd) = local_got_ents;
5265 }
5266
5267 if ((tls_type & (PLT_IFUNC | TLS_EXPLICIT)) == 0)
5268 {
5269 struct got_entry *ent;
5270
5271 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
5272 if (ent->addend == r_addend
5273 && ent->owner == abfd
5274 && ent->tls_type == tls_type)
5275 break;
5276 if (ent == NULL)
5277 {
5278 bfd_size_type amt = sizeof (*ent);
5279 ent = bfd_alloc (abfd, amt);
5280 if (ent == NULL)
5281 return FALSE;
5282 ent->next = local_got_ents[r_symndx];
5283 ent->addend = r_addend;
5284 ent->owner = abfd;
5285 ent->tls_type = tls_type;
5286 ent->is_indirect = FALSE;
5287 ent->got.refcount = 0;
5288 local_got_ents[r_symndx] = ent;
5289 }
5290 ent->got.refcount += 1;
5291 }
5292
5293 local_plt = (struct plt_entry **) (local_got_ents + symtab_hdr->sh_info);
5294 local_got_tls_masks = (unsigned char *) (local_plt + symtab_hdr->sh_info);
5295 local_got_tls_masks[r_symndx] |= tls_type;
5296
5297 return local_plt + r_symndx;
5298 }
5299
5300 static bfd_boolean
5301 update_plt_info (bfd *abfd, struct plt_entry **plist, bfd_vma addend)
5302 {
5303 struct plt_entry *ent;
5304
5305 for (ent = *plist; ent != NULL; ent = ent->next)
5306 if (ent->addend == addend)
5307 break;
5308 if (ent == NULL)
5309 {
5310 bfd_size_type amt = sizeof (*ent);
5311 ent = bfd_alloc (abfd, amt);
5312 if (ent == NULL)
5313 return FALSE;
5314 ent->next = *plist;
5315 ent->addend = addend;
5316 ent->plt.refcount = 0;
5317 *plist = ent;
5318 }
5319 ent->plt.refcount += 1;
5320 return TRUE;
5321 }
5322
5323 static bfd_boolean
5324 is_branch_reloc (enum elf_ppc64_reloc_type r_type)
5325 {
5326 return (r_type == R_PPC64_REL24
5327 || r_type == R_PPC64_REL14
5328 || r_type == R_PPC64_REL14_BRTAKEN
5329 || r_type == R_PPC64_REL14_BRNTAKEN
5330 || r_type == R_PPC64_ADDR24
5331 || r_type == R_PPC64_ADDR14
5332 || r_type == R_PPC64_ADDR14_BRTAKEN
5333 || r_type == R_PPC64_ADDR14_BRNTAKEN);
5334 }
5335
5336 /* Look through the relocs for a section during the first phase, and
5337 calculate needed space in the global offset table, procedure
5338 linkage table, and dynamic reloc sections. */
5339
5340 static bfd_boolean
5341 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
5342 asection *sec, const Elf_Internal_Rela *relocs)
5343 {
5344 struct ppc_link_hash_table *htab;
5345 Elf_Internal_Shdr *symtab_hdr;
5346 struct elf_link_hash_entry **sym_hashes;
5347 const Elf_Internal_Rela *rel;
5348 const Elf_Internal_Rela *rel_end;
5349 asection *sreloc;
5350 asection **opd_sym_map;
5351 struct elf_link_hash_entry *tga, *dottga;
5352
5353 if (bfd_link_relocatable (info))
5354 return TRUE;
5355
5356 /* Don't do anything special with non-loaded, non-alloced sections.
5357 In particular, any relocs in such sections should not affect GOT
5358 and PLT reference counting (ie. we don't allow them to create GOT
5359 or PLT entries), there's no possibility or desire to optimize TLS
5360 relocs, and there's not much point in propagating relocs to shared
5361 libs that the dynamic linker won't relocate. */
5362 if ((sec->flags & SEC_ALLOC) == 0)
5363 return TRUE;
5364
5365 BFD_ASSERT (is_ppc64_elf (abfd));
5366
5367 htab = ppc_hash_table (info);
5368 if (htab == NULL)
5369 return FALSE;
5370
5371 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
5372 FALSE, FALSE, TRUE);
5373 dottga = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
5374 FALSE, FALSE, TRUE);
5375 symtab_hdr = &elf_symtab_hdr (abfd);
5376 sym_hashes = elf_sym_hashes (abfd);
5377 sreloc = NULL;
5378 opd_sym_map = NULL;
5379 if (ppc64_elf_section_data (sec) != NULL
5380 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
5381 opd_sym_map = ppc64_elf_section_data (sec)->u.opd.func_sec;
5382
5383 rel_end = relocs + sec->reloc_count;
5384 for (rel = relocs; rel < rel_end; rel++)
5385 {
5386 unsigned long r_symndx;
5387 struct elf_link_hash_entry *h;
5388 enum elf_ppc64_reloc_type r_type;
5389 int tls_type;
5390 struct _ppc64_elf_section_data *ppc64_sec;
5391 struct plt_entry **ifunc, **plt_list;
5392
5393 r_symndx = ELF64_R_SYM (rel->r_info);
5394 if (r_symndx < symtab_hdr->sh_info)
5395 h = NULL;
5396 else
5397 {
5398 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5399 h = elf_follow_link (h);
5400
5401 /* PR15323, ref flags aren't set for references in the same
5402 object. */
5403 h->root.non_ir_ref = 1;
5404
5405 if (h == htab->elf.hgot)
5406 sec->has_toc_reloc = 1;
5407 }
5408
5409 tls_type = 0;
5410 ifunc = NULL;
5411 if (h != NULL)
5412 {
5413 if (h->type == STT_GNU_IFUNC)
5414 {
5415 h->needs_plt = 1;
5416 ifunc = &h->plt.plist;
5417 }
5418 }
5419 else
5420 {
5421 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5422 abfd, r_symndx);
5423 if (isym == NULL)
5424 return FALSE;
5425
5426 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
5427 {
5428 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
5429 rel->r_addend, PLT_IFUNC);
5430 if (ifunc == NULL)
5431 return FALSE;
5432 }
5433 }
5434
5435 r_type = ELF64_R_TYPE (rel->r_info);
5436 switch (r_type)
5437 {
5438 case R_PPC64_TLSGD:
5439 case R_PPC64_TLSLD:
5440 /* These special tls relocs tie a call to __tls_get_addr with
5441 its parameter symbol. */
5442 break;
5443
5444 case R_PPC64_GOT_TLSLD16:
5445 case R_PPC64_GOT_TLSLD16_LO:
5446 case R_PPC64_GOT_TLSLD16_HI:
5447 case R_PPC64_GOT_TLSLD16_HA:
5448 tls_type = TLS_TLS | TLS_LD;
5449 goto dogottls;
5450
5451 case R_PPC64_GOT_TLSGD16:
5452 case R_PPC64_GOT_TLSGD16_LO:
5453 case R_PPC64_GOT_TLSGD16_HI:
5454 case R_PPC64_GOT_TLSGD16_HA:
5455 tls_type = TLS_TLS | TLS_GD;
5456 goto dogottls;
5457
5458 case R_PPC64_GOT_TPREL16_DS:
5459 case R_PPC64_GOT_TPREL16_LO_DS:
5460 case R_PPC64_GOT_TPREL16_HI:
5461 case R_PPC64_GOT_TPREL16_HA:
5462 if (bfd_link_pic (info))
5463 info->flags |= DF_STATIC_TLS;
5464 tls_type = TLS_TLS | TLS_TPREL;
5465 goto dogottls;
5466
5467 case R_PPC64_GOT_DTPREL16_DS:
5468 case R_PPC64_GOT_DTPREL16_LO_DS:
5469 case R_PPC64_GOT_DTPREL16_HI:
5470 case R_PPC64_GOT_DTPREL16_HA:
5471 tls_type = TLS_TLS | TLS_DTPREL;
5472 dogottls:
5473 sec->has_tls_reloc = 1;
5474 /* Fall thru */
5475
5476 case R_PPC64_GOT16:
5477 case R_PPC64_GOT16_DS:
5478 case R_PPC64_GOT16_HA:
5479 case R_PPC64_GOT16_HI:
5480 case R_PPC64_GOT16_LO:
5481 case R_PPC64_GOT16_LO_DS:
5482 /* This symbol requires a global offset table entry. */
5483 sec->has_toc_reloc = 1;
5484 if (r_type == R_PPC64_GOT_TLSLD16
5485 || r_type == R_PPC64_GOT_TLSGD16
5486 || r_type == R_PPC64_GOT_TPREL16_DS
5487 || r_type == R_PPC64_GOT_DTPREL16_DS
5488 || r_type == R_PPC64_GOT16
5489 || r_type == R_PPC64_GOT16_DS)
5490 {
5491 htab->do_multi_toc = 1;
5492 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5493 }
5494
5495 if (ppc64_elf_tdata (abfd)->got == NULL
5496 && !create_got_section (abfd, info))
5497 return FALSE;
5498
5499 if (h != NULL)
5500 {
5501 struct ppc_link_hash_entry *eh;
5502 struct got_entry *ent;
5503
5504 eh = (struct ppc_link_hash_entry *) h;
5505 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
5506 if (ent->addend == rel->r_addend
5507 && ent->owner == abfd
5508 && ent->tls_type == tls_type)
5509 break;
5510 if (ent == NULL)
5511 {
5512 bfd_size_type amt = sizeof (*ent);
5513 ent = bfd_alloc (abfd, amt);
5514 if (ent == NULL)
5515 return FALSE;
5516 ent->next = eh->elf.got.glist;
5517 ent->addend = rel->r_addend;
5518 ent->owner = abfd;
5519 ent->tls_type = tls_type;
5520 ent->is_indirect = FALSE;
5521 ent->got.refcount = 0;
5522 eh->elf.got.glist = ent;
5523 }
5524 ent->got.refcount += 1;
5525 eh->tls_mask |= tls_type;
5526 }
5527 else
5528 /* This is a global offset table entry for a local symbol. */
5529 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5530 rel->r_addend, tls_type))
5531 return FALSE;
5532
5533 /* We may also need a plt entry if the symbol turns out to be
5534 an ifunc. */
5535 if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1)
5536 {
5537 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5538 return FALSE;
5539 }
5540 break;
5541
5542 case R_PPC64_PLT16_HA:
5543 case R_PPC64_PLT16_HI:
5544 case R_PPC64_PLT16_LO:
5545 case R_PPC64_PLT32:
5546 case R_PPC64_PLT64:
5547 /* This symbol requires a procedure linkage table entry. */
5548 plt_list = ifunc;
5549 if (h != NULL)
5550 {
5551 h->needs_plt = 1;
5552 if (h->root.root.string[0] == '.'
5553 && h->root.root.string[1] != '\0')
5554 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5555 plt_list = &h->plt.plist;
5556 }
5557 if (plt_list == NULL)
5558 {
5559 /* It does not make sense to have a procedure linkage
5560 table entry for a non-ifunc local symbol. */
5561 info->callbacks->einfo
5562 (_("%P: %H: %s reloc against local symbol\n"),
5563 abfd, sec, rel->r_offset,
5564 ppc64_elf_howto_table[r_type]->name);
5565 bfd_set_error (bfd_error_bad_value);
5566 return FALSE;
5567 }
5568 if (!update_plt_info (abfd, plt_list, rel->r_addend))
5569 return FALSE;
5570 break;
5571
5572 /* The following relocations don't need to propagate the
5573 relocation if linking a shared object since they are
5574 section relative. */
5575 case R_PPC64_SECTOFF:
5576 case R_PPC64_SECTOFF_LO:
5577 case R_PPC64_SECTOFF_HI:
5578 case R_PPC64_SECTOFF_HA:
5579 case R_PPC64_SECTOFF_DS:
5580 case R_PPC64_SECTOFF_LO_DS:
5581 case R_PPC64_DTPREL16:
5582 case R_PPC64_DTPREL16_LO:
5583 case R_PPC64_DTPREL16_HI:
5584 case R_PPC64_DTPREL16_HA:
5585 case R_PPC64_DTPREL16_DS:
5586 case R_PPC64_DTPREL16_LO_DS:
5587 case R_PPC64_DTPREL16_HIGH:
5588 case R_PPC64_DTPREL16_HIGHA:
5589 case R_PPC64_DTPREL16_HIGHER:
5590 case R_PPC64_DTPREL16_HIGHERA:
5591 case R_PPC64_DTPREL16_HIGHEST:
5592 case R_PPC64_DTPREL16_HIGHESTA:
5593 break;
5594
5595 /* Nor do these. */
5596 case R_PPC64_REL16:
5597 case R_PPC64_REL16_LO:
5598 case R_PPC64_REL16_HI:
5599 case R_PPC64_REL16_HA:
5600 case R_PPC64_REL16DX_HA:
5601 break;
5602
5603 /* Not supported as a dynamic relocation. */
5604 case R_PPC64_ADDR64_LOCAL:
5605 if (bfd_link_pic (info))
5606 {
5607 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
5608 ppc_howto_init ();
5609 info->callbacks->einfo (_("%P: %H: %s reloc unsupported "
5610 "in shared libraries and PIEs.\n"),
5611 abfd, sec, rel->r_offset,
5612 ppc64_elf_howto_table[r_type]->name);
5613 bfd_set_error (bfd_error_bad_value);
5614 return FALSE;
5615 }
5616 break;
5617
5618 case R_PPC64_TOC16:
5619 case R_PPC64_TOC16_DS:
5620 htab->do_multi_toc = 1;
5621 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5622 case R_PPC64_TOC16_LO:
5623 case R_PPC64_TOC16_HI:
5624 case R_PPC64_TOC16_HA:
5625 case R_PPC64_TOC16_LO_DS:
5626 sec->has_toc_reloc = 1;
5627 break;
5628
5629 /* Marker reloc. */
5630 case R_PPC64_ENTRY:
5631 break;
5632
5633 /* This relocation describes the C++ object vtable hierarchy.
5634 Reconstruct it for later use during GC. */
5635 case R_PPC64_GNU_VTINHERIT:
5636 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
5637 return FALSE;
5638 break;
5639
5640 /* This relocation describes which C++ vtable entries are actually
5641 used. Record for later use during GC. */
5642 case R_PPC64_GNU_VTENTRY:
5643 BFD_ASSERT (h != NULL);
5644 if (h != NULL
5645 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
5646 return FALSE;
5647 break;
5648
5649 case R_PPC64_REL14:
5650 case R_PPC64_REL14_BRTAKEN:
5651 case R_PPC64_REL14_BRNTAKEN:
5652 {
5653 asection *dest = NULL;
5654
5655 /* Heuristic: If jumping outside our section, chances are
5656 we are going to need a stub. */
5657 if (h != NULL)
5658 {
5659 /* If the sym is weak it may be overridden later, so
5660 don't assume we know where a weak sym lives. */
5661 if (h->root.type == bfd_link_hash_defined)
5662 dest = h->root.u.def.section;
5663 }
5664 else
5665 {
5666 Elf_Internal_Sym *isym;
5667
5668 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5669 abfd, r_symndx);
5670 if (isym == NULL)
5671 return FALSE;
5672
5673 dest = bfd_section_from_elf_index (abfd, isym->st_shndx);
5674 }
5675
5676 if (dest != sec)
5677 ppc64_elf_section_data (sec)->has_14bit_branch = 1;
5678 }
5679 /* Fall through. */
5680
5681 case R_PPC64_REL24:
5682 plt_list = ifunc;
5683 if (h != NULL)
5684 {
5685 h->needs_plt = 1;
5686 if (h->root.root.string[0] == '.'
5687 && h->root.root.string[1] != '\0')
5688 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5689
5690 if (h == tga || h == dottga)
5691 {
5692 sec->has_tls_reloc = 1;
5693 if (rel != relocs
5694 && (ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSGD
5695 || ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSLD))
5696 /* We have a new-style __tls_get_addr call with
5697 a marker reloc. */
5698 ;
5699 else
5700 /* Mark this section as having an old-style call. */
5701 sec->has_tls_get_addr_call = 1;
5702 }
5703 plt_list = &h->plt.plist;
5704 }
5705
5706 /* We may need a .plt entry if the function this reloc
5707 refers to is in a shared lib. */
5708 if (plt_list
5709 && !update_plt_info (abfd, plt_list, rel->r_addend))
5710 return FALSE;
5711 break;
5712
5713 case R_PPC64_ADDR14:
5714 case R_PPC64_ADDR14_BRNTAKEN:
5715 case R_PPC64_ADDR14_BRTAKEN:
5716 case R_PPC64_ADDR24:
5717 goto dodyn;
5718
5719 case R_PPC64_TPREL64:
5720 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
5721 if (bfd_link_pic (info))
5722 info->flags |= DF_STATIC_TLS;
5723 goto dotlstoc;
5724
5725 case R_PPC64_DTPMOD64:
5726 if (rel + 1 < rel_end
5727 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
5728 && rel[1].r_offset == rel->r_offset + 8)
5729 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
5730 else
5731 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
5732 goto dotlstoc;
5733
5734 case R_PPC64_DTPREL64:
5735 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
5736 if (rel != relocs
5737 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
5738 && rel[-1].r_offset == rel->r_offset - 8)
5739 /* This is the second reloc of a dtpmod, dtprel pair.
5740 Don't mark with TLS_DTPREL. */
5741 goto dodyn;
5742
5743 dotlstoc:
5744 sec->has_tls_reloc = 1;
5745 if (h != NULL)
5746 {
5747 struct ppc_link_hash_entry *eh;
5748 eh = (struct ppc_link_hash_entry *) h;
5749 eh->tls_mask |= tls_type;
5750 }
5751 else
5752 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5753 rel->r_addend, tls_type))
5754 return FALSE;
5755
5756 ppc64_sec = ppc64_elf_section_data (sec);
5757 if (ppc64_sec->sec_type != sec_toc)
5758 {
5759 bfd_size_type amt;
5760
5761 /* One extra to simplify get_tls_mask. */
5762 amt = sec->size * sizeof (unsigned) / 8 + sizeof (unsigned);
5763 ppc64_sec->u.toc.symndx = bfd_zalloc (abfd, amt);
5764 if (ppc64_sec->u.toc.symndx == NULL)
5765 return FALSE;
5766 amt = sec->size * sizeof (bfd_vma) / 8;
5767 ppc64_sec->u.toc.add = bfd_zalloc (abfd, amt);
5768 if (ppc64_sec->u.toc.add == NULL)
5769 return FALSE;
5770 BFD_ASSERT (ppc64_sec->sec_type == sec_normal);
5771 ppc64_sec->sec_type = sec_toc;
5772 }
5773 BFD_ASSERT (rel->r_offset % 8 == 0);
5774 ppc64_sec->u.toc.symndx[rel->r_offset / 8] = r_symndx;
5775 ppc64_sec->u.toc.add[rel->r_offset / 8] = rel->r_addend;
5776
5777 /* Mark the second slot of a GD or LD entry.
5778 -1 to indicate GD and -2 to indicate LD. */
5779 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
5780 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -1;
5781 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
5782 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -2;
5783 goto dodyn;
5784
5785 case R_PPC64_TPREL16:
5786 case R_PPC64_TPREL16_LO:
5787 case R_PPC64_TPREL16_HI:
5788 case R_PPC64_TPREL16_HA:
5789 case R_PPC64_TPREL16_DS:
5790 case R_PPC64_TPREL16_LO_DS:
5791 case R_PPC64_TPREL16_HIGH:
5792 case R_PPC64_TPREL16_HIGHA:
5793 case R_PPC64_TPREL16_HIGHER:
5794 case R_PPC64_TPREL16_HIGHERA:
5795 case R_PPC64_TPREL16_HIGHEST:
5796 case R_PPC64_TPREL16_HIGHESTA:
5797 if (bfd_link_pic (info))
5798 {
5799 info->flags |= DF_STATIC_TLS;
5800 goto dodyn;
5801 }
5802 break;
5803
5804 case R_PPC64_ADDR64:
5805 if (opd_sym_map != NULL
5806 && rel + 1 < rel_end
5807 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
5808 {
5809 if (h != NULL)
5810 {
5811 if (h->root.root.string[0] == '.'
5812 && h->root.root.string[1] != 0
5813 && lookup_fdh ((struct ppc_link_hash_entry *) h, htab))
5814 ;
5815 else
5816 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5817 }
5818 else
5819 {
5820 asection *s;
5821 Elf_Internal_Sym *isym;
5822
5823 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5824 abfd, r_symndx);
5825 if (isym == NULL)
5826 return FALSE;
5827
5828 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5829 if (s != NULL && s != sec)
5830 opd_sym_map[OPD_NDX (rel->r_offset)] = s;
5831 }
5832 }
5833 /* Fall through. */
5834
5835 case R_PPC64_ADDR16:
5836 case R_PPC64_ADDR16_DS:
5837 case R_PPC64_ADDR16_HA:
5838 case R_PPC64_ADDR16_HI:
5839 case R_PPC64_ADDR16_HIGH:
5840 case R_PPC64_ADDR16_HIGHA:
5841 case R_PPC64_ADDR16_HIGHER:
5842 case R_PPC64_ADDR16_HIGHERA:
5843 case R_PPC64_ADDR16_HIGHEST:
5844 case R_PPC64_ADDR16_HIGHESTA:
5845 case R_PPC64_ADDR16_LO:
5846 case R_PPC64_ADDR16_LO_DS:
5847 if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1
5848 && rel->r_addend == 0)
5849 {
5850 /* We may need a .plt entry if this reloc refers to a
5851 function in a shared lib. */
5852 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5853 return FALSE;
5854 h->pointer_equality_needed = 1;
5855 }
5856 /* Fall through. */
5857
5858 case R_PPC64_REL30:
5859 case R_PPC64_REL32:
5860 case R_PPC64_REL64:
5861 case R_PPC64_ADDR32:
5862 case R_PPC64_UADDR16:
5863 case R_PPC64_UADDR32:
5864 case R_PPC64_UADDR64:
5865 case R_PPC64_TOC:
5866 if (h != NULL && !bfd_link_pic (info))
5867 /* We may need a copy reloc. */
5868 h->non_got_ref = 1;
5869
5870 /* Don't propagate .opd relocs. */
5871 if (NO_OPD_RELOCS && opd_sym_map != NULL)
5872 break;
5873
5874 /* If we are creating a shared library, and this is a reloc
5875 against a global symbol, or a non PC relative reloc
5876 against a local symbol, then we need to copy the reloc
5877 into the shared library. However, if we are linking with
5878 -Bsymbolic, we do not need to copy a reloc against a
5879 global symbol which is defined in an object we are
5880 including in the link (i.e., DEF_REGULAR is set). At
5881 this point we have not seen all the input files, so it is
5882 possible that DEF_REGULAR is not set now but will be set
5883 later (it is never cleared). In case of a weak definition,
5884 DEF_REGULAR may be cleared later by a strong definition in
5885 a shared library. We account for that possibility below by
5886 storing information in the dyn_relocs field of the hash
5887 table entry. A similar situation occurs when creating
5888 shared libraries and symbol visibility changes render the
5889 symbol local.
5890
5891 If on the other hand, we are creating an executable, we
5892 may need to keep relocations for symbols satisfied by a
5893 dynamic library if we manage to avoid copy relocs for the
5894 symbol. */
5895 dodyn:
5896 if ((bfd_link_pic (info)
5897 && (must_be_dyn_reloc (info, r_type)
5898 || (h != NULL
5899 && (!SYMBOLIC_BIND (info, h)
5900 || h->root.type == bfd_link_hash_defweak
5901 || !h->def_regular))))
5902 || (ELIMINATE_COPY_RELOCS
5903 && !bfd_link_pic (info)
5904 && h != NULL
5905 && (h->root.type == bfd_link_hash_defweak
5906 || !h->def_regular))
5907 || (!bfd_link_pic (info)
5908 && ifunc != NULL))
5909 {
5910 /* We must copy these reloc types into the output file.
5911 Create a reloc section in dynobj and make room for
5912 this reloc. */
5913 if (sreloc == NULL)
5914 {
5915 sreloc = _bfd_elf_make_dynamic_reloc_section
5916 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
5917
5918 if (sreloc == NULL)
5919 return FALSE;
5920 }
5921
5922 /* If this is a global symbol, we count the number of
5923 relocations we need for this symbol. */
5924 if (h != NULL)
5925 {
5926 struct elf_dyn_relocs *p;
5927 struct elf_dyn_relocs **head;
5928
5929 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
5930 p = *head;
5931 if (p == NULL || p->sec != sec)
5932 {
5933 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5934 if (p == NULL)
5935 return FALSE;
5936 p->next = *head;
5937 *head = p;
5938 p->sec = sec;
5939 p->count = 0;
5940 p->pc_count = 0;
5941 }
5942 p->count += 1;
5943 if (!must_be_dyn_reloc (info, r_type))
5944 p->pc_count += 1;
5945 }
5946 else
5947 {
5948 /* Track dynamic relocs needed for local syms too.
5949 We really need local syms available to do this
5950 easily. Oh well. */
5951 struct ppc_dyn_relocs *p;
5952 struct ppc_dyn_relocs **head;
5953 bfd_boolean is_ifunc;
5954 asection *s;
5955 void *vpp;
5956 Elf_Internal_Sym *isym;
5957
5958 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5959 abfd, r_symndx);
5960 if (isym == NULL)
5961 return FALSE;
5962
5963 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5964 if (s == NULL)
5965 s = sec;
5966
5967 vpp = &elf_section_data (s)->local_dynrel;
5968 head = (struct ppc_dyn_relocs **) vpp;
5969 is_ifunc = ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC;
5970 p = *head;
5971 if (p != NULL && p->sec == sec && p->ifunc != is_ifunc)
5972 p = p->next;
5973 if (p == NULL || p->sec != sec || p->ifunc != is_ifunc)
5974 {
5975 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5976 if (p == NULL)
5977 return FALSE;
5978 p->next = *head;
5979 *head = p;
5980 p->sec = sec;
5981 p->ifunc = is_ifunc;
5982 p->count = 0;
5983 }
5984 p->count += 1;
5985 }
5986 }
5987 break;
5988
5989 default:
5990 break;
5991 }
5992 }
5993
5994 return TRUE;
5995 }
5996
5997 /* Merge backend specific data from an object file to the output
5998 object file when linking. */
5999
6000 static bfd_boolean
6001 ppc64_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
6002 {
6003 unsigned long iflags, oflags;
6004
6005 if ((ibfd->flags & BFD_LINKER_CREATED) != 0)
6006 return TRUE;
6007
6008 if (!is_ppc64_elf (ibfd) || !is_ppc64_elf (obfd))
6009 return TRUE;
6010
6011 if (!_bfd_generic_verify_endian_match (ibfd, obfd))
6012 return FALSE;
6013
6014 iflags = elf_elfheader (ibfd)->e_flags;
6015 oflags = elf_elfheader (obfd)->e_flags;
6016
6017 if (iflags & ~EF_PPC64_ABI)
6018 {
6019 (*_bfd_error_handler)
6020 (_("%B uses unknown e_flags 0x%lx"), ibfd, iflags);
6021 bfd_set_error (bfd_error_bad_value);
6022 return FALSE;
6023 }
6024 else if (iflags != oflags && iflags != 0)
6025 {
6026 (*_bfd_error_handler)
6027 (_("%B: ABI version %ld is not compatible with ABI version %ld output"),
6028 ibfd, iflags, oflags);
6029 bfd_set_error (bfd_error_bad_value);
6030 return FALSE;
6031 }
6032
6033 /* Merge Tag_compatibility attributes and any common GNU ones. */
6034 _bfd_elf_merge_object_attributes (ibfd, obfd);
6035
6036 return TRUE;
6037 }
6038
6039 static bfd_boolean
6040 ppc64_elf_print_private_bfd_data (bfd *abfd, void *ptr)
6041 {
6042 /* Print normal ELF private data. */
6043 _bfd_elf_print_private_bfd_data (abfd, ptr);
6044
6045 if (elf_elfheader (abfd)->e_flags != 0)
6046 {
6047 FILE *file = ptr;
6048
6049 /* xgettext:c-format */
6050 fprintf (file, _("private flags = 0x%lx:"),
6051 elf_elfheader (abfd)->e_flags);
6052
6053 if ((elf_elfheader (abfd)->e_flags & EF_PPC64_ABI) != 0)
6054 fprintf (file, _(" [abiv%ld]"),
6055 elf_elfheader (abfd)->e_flags & EF_PPC64_ABI);
6056 fputc ('\n', file);
6057 }
6058
6059 return TRUE;
6060 }
6061
6062 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
6063 of the code entry point, and its section, which must be in the same
6064 object as OPD_SEC. Returns (bfd_vma) -1 on error. */
6065
6066 static bfd_vma
6067 opd_entry_value (asection *opd_sec,
6068 bfd_vma offset,
6069 asection **code_sec,
6070 bfd_vma *code_off,
6071 bfd_boolean in_code_sec)
6072 {
6073 bfd *opd_bfd = opd_sec->owner;
6074 Elf_Internal_Rela *relocs;
6075 Elf_Internal_Rela *lo, *hi, *look;
6076 bfd_vma val;
6077
6078 /* No relocs implies we are linking a --just-symbols object, or looking
6079 at a final linked executable with addr2line or somesuch. */
6080 if (opd_sec->reloc_count == 0)
6081 {
6082 bfd_byte *contents = ppc64_elf_tdata (opd_bfd)->opd.contents;
6083
6084 if (contents == NULL)
6085 {
6086 if (!bfd_malloc_and_get_section (opd_bfd, opd_sec, &contents))
6087 return (bfd_vma) -1;
6088 ppc64_elf_tdata (opd_bfd)->opd.contents = contents;
6089 }
6090
6091 /* PR 17512: file: 64b9dfbb. */
6092 if (offset + 7 >= opd_sec->size || offset + 7 < offset)
6093 return (bfd_vma) -1;
6094
6095 val = bfd_get_64 (opd_bfd, contents + offset);
6096 if (code_sec != NULL)
6097 {
6098 asection *sec, *likely = NULL;
6099
6100 if (in_code_sec)
6101 {
6102 sec = *code_sec;
6103 if (sec->vma <= val
6104 && val < sec->vma + sec->size)
6105 likely = sec;
6106 else
6107 val = -1;
6108 }
6109 else
6110 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
6111 if (sec->vma <= val
6112 && (sec->flags & SEC_LOAD) != 0
6113 && (sec->flags & SEC_ALLOC) != 0)
6114 likely = sec;
6115 if (likely != NULL)
6116 {
6117 *code_sec = likely;
6118 if (code_off != NULL)
6119 *code_off = val - likely->vma;
6120 }
6121 }
6122 return val;
6123 }
6124
6125 BFD_ASSERT (is_ppc64_elf (opd_bfd));
6126
6127 relocs = ppc64_elf_tdata (opd_bfd)->opd.relocs;
6128 if (relocs == NULL)
6129 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
6130 /* PR 17512: file: df8e1fd6. */
6131 if (relocs == NULL)
6132 return (bfd_vma) -1;
6133
6134 /* Go find the opd reloc at the sym address. */
6135 lo = relocs;
6136 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
6137 val = (bfd_vma) -1;
6138 while (lo < hi)
6139 {
6140 look = lo + (hi - lo) / 2;
6141 if (look->r_offset < offset)
6142 lo = look + 1;
6143 else if (look->r_offset > offset)
6144 hi = look;
6145 else
6146 {
6147 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (opd_bfd);
6148
6149 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
6150 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
6151 {
6152 unsigned long symndx = ELF64_R_SYM (look->r_info);
6153 asection *sec = NULL;
6154
6155 if (symndx >= symtab_hdr->sh_info
6156 && elf_sym_hashes (opd_bfd) != NULL)
6157 {
6158 struct elf_link_hash_entry **sym_hashes;
6159 struct elf_link_hash_entry *rh;
6160
6161 sym_hashes = elf_sym_hashes (opd_bfd);
6162 rh = sym_hashes[symndx - symtab_hdr->sh_info];
6163 if (rh != NULL)
6164 {
6165 rh = elf_follow_link (rh);
6166 if (rh->root.type != bfd_link_hash_defined
6167 && rh->root.type != bfd_link_hash_defweak)
6168 break;
6169 if (rh->root.u.def.section->owner == opd_bfd)
6170 {
6171 val = rh->root.u.def.value;
6172 sec = rh->root.u.def.section;
6173 }
6174 }
6175 }
6176
6177 if (sec == NULL)
6178 {
6179 Elf_Internal_Sym *sym;
6180
6181 if (symndx < symtab_hdr->sh_info)
6182 {
6183 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
6184 if (sym == NULL)
6185 {
6186 size_t symcnt = symtab_hdr->sh_info;
6187 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
6188 symcnt, 0,
6189 NULL, NULL, NULL);
6190 if (sym == NULL)
6191 break;
6192 symtab_hdr->contents = (bfd_byte *) sym;
6193 }
6194 sym += symndx;
6195 }
6196 else
6197 {
6198 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
6199 1, symndx,
6200 NULL, NULL, NULL);
6201 if (sym == NULL)
6202 break;
6203 }
6204 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
6205 if (sec == NULL)
6206 break;
6207 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
6208 val = sym->st_value;
6209 }
6210
6211 val += look->r_addend;
6212 if (code_off != NULL)
6213 *code_off = val;
6214 if (code_sec != NULL)
6215 {
6216 if (in_code_sec && *code_sec != sec)
6217 return -1;
6218 else
6219 *code_sec = sec;
6220 }
6221 if (sec->output_section != NULL)
6222 val += sec->output_section->vma + sec->output_offset;
6223 }
6224 break;
6225 }
6226 }
6227
6228 return val;
6229 }
6230
6231 /* If the ELF symbol SYM might be a function in SEC, return the
6232 function size and set *CODE_OFF to the function's entry point,
6233 otherwise return zero. */
6234
6235 static bfd_size_type
6236 ppc64_elf_maybe_function_sym (const asymbol *sym, asection *sec,
6237 bfd_vma *code_off)
6238 {
6239 bfd_size_type size;
6240
6241 if ((sym->flags & (BSF_SECTION_SYM | BSF_FILE | BSF_OBJECT
6242 | BSF_THREAD_LOCAL | BSF_RELC | BSF_SRELC)) != 0)
6243 return 0;
6244
6245 size = 0;
6246 if (!(sym->flags & BSF_SYNTHETIC))
6247 size = ((elf_symbol_type *) sym)->internal_elf_sym.st_size;
6248
6249 if (strcmp (sym->section->name, ".opd") == 0)
6250 {
6251 struct _opd_sec_data *opd = get_opd_info (sym->section);
6252 bfd_vma symval = sym->value;
6253
6254 if (opd != NULL
6255 && opd->adjust != NULL
6256 && elf_section_data (sym->section)->relocs != NULL)
6257 {
6258 /* opd_entry_value will use cached relocs that have been
6259 adjusted, but with raw symbols. That means both local
6260 and global symbols need adjusting. */
6261 long adjust = opd->adjust[OPD_NDX (symval)];
6262 if (adjust == -1)
6263 return 0;
6264 symval += adjust;
6265 }
6266
6267 if (opd_entry_value (sym->section, symval,
6268 &sec, code_off, TRUE) == (bfd_vma) -1)
6269 return 0;
6270 /* An old ABI binary with dot-syms has a size of 24 on the .opd
6271 symbol. This size has nothing to do with the code size of the
6272 function, which is what we're supposed to return, but the
6273 code size isn't available without looking up the dot-sym.
6274 However, doing that would be a waste of time particularly
6275 since elf_find_function will look at the dot-sym anyway.
6276 Now, elf_find_function will keep the largest size of any
6277 function sym found at the code address of interest, so return
6278 1 here to avoid it incorrectly caching a larger function size
6279 for a small function. This does mean we return the wrong
6280 size for a new-ABI function of size 24, but all that does is
6281 disable caching for such functions. */
6282 if (size == 24)
6283 size = 1;
6284 }
6285 else
6286 {
6287 if (sym->section != sec)
6288 return 0;
6289 *code_off = sym->value;
6290 }
6291 if (size == 0)
6292 size = 1;
6293 return size;
6294 }
6295
6296 /* Return true if symbol is defined in a regular object file. */
6297
6298 static bfd_boolean
6299 is_static_defined (struct elf_link_hash_entry *h)
6300 {
6301 return ((h->root.type == bfd_link_hash_defined
6302 || h->root.type == bfd_link_hash_defweak)
6303 && h->root.u.def.section != NULL
6304 && h->root.u.def.section->output_section != NULL);
6305 }
6306
6307 /* If FDH is a function descriptor symbol, return the associated code
6308 entry symbol if it is defined. Return NULL otherwise. */
6309
6310 static struct ppc_link_hash_entry *
6311 defined_code_entry (struct ppc_link_hash_entry *fdh)
6312 {
6313 if (fdh->is_func_descriptor)
6314 {
6315 struct ppc_link_hash_entry *fh = ppc_follow_link (fdh->oh);
6316 if (fh->elf.root.type == bfd_link_hash_defined
6317 || fh->elf.root.type == bfd_link_hash_defweak)
6318 return fh;
6319 }
6320 return NULL;
6321 }
6322
6323 /* If FH is a function code entry symbol, return the associated
6324 function descriptor symbol if it is defined. Return NULL otherwise. */
6325
6326 static struct ppc_link_hash_entry *
6327 defined_func_desc (struct ppc_link_hash_entry *fh)
6328 {
6329 if (fh->oh != NULL
6330 && fh->oh->is_func_descriptor)
6331 {
6332 struct ppc_link_hash_entry *fdh = ppc_follow_link (fh->oh);
6333 if (fdh->elf.root.type == bfd_link_hash_defined
6334 || fdh->elf.root.type == bfd_link_hash_defweak)
6335 return fdh;
6336 }
6337 return NULL;
6338 }
6339
6340 /* Mark all our entry sym sections, both opd and code section. */
6341
6342 static void
6343 ppc64_elf_gc_keep (struct bfd_link_info *info)
6344 {
6345 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6346 struct bfd_sym_chain *sym;
6347
6348 if (htab == NULL)
6349 return;
6350
6351 for (sym = info->gc_sym_list; sym != NULL; sym = sym->next)
6352 {
6353 struct ppc_link_hash_entry *eh, *fh;
6354 asection *sec;
6355
6356 eh = (struct ppc_link_hash_entry *)
6357 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, TRUE);
6358 if (eh == NULL)
6359 continue;
6360 if (eh->elf.root.type != bfd_link_hash_defined
6361 && eh->elf.root.type != bfd_link_hash_defweak)
6362 continue;
6363
6364 fh = defined_code_entry (eh);
6365 if (fh != NULL)
6366 {
6367 sec = fh->elf.root.u.def.section;
6368 sec->flags |= SEC_KEEP;
6369 }
6370 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6371 && opd_entry_value (eh->elf.root.u.def.section,
6372 eh->elf.root.u.def.value,
6373 &sec, NULL, FALSE) != (bfd_vma) -1)
6374 sec->flags |= SEC_KEEP;
6375
6376 sec = eh->elf.root.u.def.section;
6377 sec->flags |= SEC_KEEP;
6378 }
6379 }
6380
6381 /* Mark sections containing dynamically referenced symbols. When
6382 building shared libraries, we must assume that any visible symbol is
6383 referenced. */
6384
6385 static bfd_boolean
6386 ppc64_elf_gc_mark_dynamic_ref (struct elf_link_hash_entry *h, void *inf)
6387 {
6388 struct bfd_link_info *info = (struct bfd_link_info *) inf;
6389 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
6390 struct ppc_link_hash_entry *fdh;
6391 struct bfd_elf_dynamic_list *d = info->dynamic_list;
6392
6393 /* Dynamic linking info is on the func descriptor sym. */
6394 fdh = defined_func_desc (eh);
6395 if (fdh != NULL)
6396 eh = fdh;
6397
6398 if ((eh->elf.root.type == bfd_link_hash_defined
6399 || eh->elf.root.type == bfd_link_hash_defweak)
6400 && (eh->elf.ref_dynamic
6401 || ((eh->elf.def_regular || ELF_COMMON_DEF_P (&eh->elf))
6402 && ELF_ST_VISIBILITY (eh->elf.other) != STV_INTERNAL
6403 && ELF_ST_VISIBILITY (eh->elf.other) != STV_HIDDEN
6404 && (!bfd_link_executable (info)
6405 || info->export_dynamic
6406 || (eh->elf.dynamic
6407 && d != NULL
6408 && (*d->match) (&d->head, NULL, eh->elf.root.root.string)))
6409 && (strchr (eh->elf.root.root.string, ELF_VER_CHR) != NULL
6410 || !bfd_hide_sym_by_version (info->version_info,
6411 eh->elf.root.root.string)))))
6412 {
6413 asection *code_sec;
6414 struct ppc_link_hash_entry *fh;
6415
6416 eh->elf.root.u.def.section->flags |= SEC_KEEP;
6417
6418 /* Function descriptor syms cause the associated
6419 function code sym section to be marked. */
6420 fh = defined_code_entry (eh);
6421 if (fh != NULL)
6422 {
6423 code_sec = fh->elf.root.u.def.section;
6424 code_sec->flags |= SEC_KEEP;
6425 }
6426 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6427 && opd_entry_value (eh->elf.root.u.def.section,
6428 eh->elf.root.u.def.value,
6429 &code_sec, NULL, FALSE) != (bfd_vma) -1)
6430 code_sec->flags |= SEC_KEEP;
6431 }
6432
6433 return TRUE;
6434 }
6435
6436 /* Return the section that should be marked against GC for a given
6437 relocation. */
6438
6439 static asection *
6440 ppc64_elf_gc_mark_hook (asection *sec,
6441 struct bfd_link_info *info,
6442 Elf_Internal_Rela *rel,
6443 struct elf_link_hash_entry *h,
6444 Elf_Internal_Sym *sym)
6445 {
6446 asection *rsec;
6447
6448 /* Syms return NULL if we're marking .opd, so we avoid marking all
6449 function sections, as all functions are referenced in .opd. */
6450 rsec = NULL;
6451 if (get_opd_info (sec) != NULL)
6452 return rsec;
6453
6454 if (h != NULL)
6455 {
6456 enum elf_ppc64_reloc_type r_type;
6457 struct ppc_link_hash_entry *eh, *fh, *fdh;
6458
6459 r_type = ELF64_R_TYPE (rel->r_info);
6460 switch (r_type)
6461 {
6462 case R_PPC64_GNU_VTINHERIT:
6463 case R_PPC64_GNU_VTENTRY:
6464 break;
6465
6466 default:
6467 switch (h->root.type)
6468 {
6469 case bfd_link_hash_defined:
6470 case bfd_link_hash_defweak:
6471 eh = (struct ppc_link_hash_entry *) h;
6472 fdh = defined_func_desc (eh);
6473 if (fdh != NULL)
6474 eh = fdh;
6475
6476 /* Function descriptor syms cause the associated
6477 function code sym section to be marked. */
6478 fh = defined_code_entry (eh);
6479 if (fh != NULL)
6480 {
6481 /* They also mark their opd section. */
6482 eh->elf.root.u.def.section->gc_mark = 1;
6483
6484 rsec = fh->elf.root.u.def.section;
6485 }
6486 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6487 && opd_entry_value (eh->elf.root.u.def.section,
6488 eh->elf.root.u.def.value,
6489 &rsec, NULL, FALSE) != (bfd_vma) -1)
6490 eh->elf.root.u.def.section->gc_mark = 1;
6491 else
6492 rsec = h->root.u.def.section;
6493 break;
6494
6495 case bfd_link_hash_common:
6496 rsec = h->root.u.c.p->section;
6497 break;
6498
6499 default:
6500 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
6501 }
6502 }
6503 }
6504 else
6505 {
6506 struct _opd_sec_data *opd;
6507
6508 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
6509 opd = get_opd_info (rsec);
6510 if (opd != NULL && opd->func_sec != NULL)
6511 {
6512 rsec->gc_mark = 1;
6513
6514 rsec = opd->func_sec[OPD_NDX (sym->st_value + rel->r_addend)];
6515 }
6516 }
6517
6518 return rsec;
6519 }
6520
6521 /* Update the .got, .plt. and dynamic reloc reference counts for the
6522 section being removed. */
6523
6524 static bfd_boolean
6525 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
6526 asection *sec, const Elf_Internal_Rela *relocs)
6527 {
6528 struct ppc_link_hash_table *htab;
6529 Elf_Internal_Shdr *symtab_hdr;
6530 struct elf_link_hash_entry **sym_hashes;
6531 struct got_entry **local_got_ents;
6532 const Elf_Internal_Rela *rel, *relend;
6533
6534 if (bfd_link_relocatable (info))
6535 return TRUE;
6536
6537 if ((sec->flags & SEC_ALLOC) == 0)
6538 return TRUE;
6539
6540 elf_section_data (sec)->local_dynrel = NULL;
6541
6542 htab = ppc_hash_table (info);
6543 if (htab == NULL)
6544 return FALSE;
6545
6546 symtab_hdr = &elf_symtab_hdr (abfd);
6547 sym_hashes = elf_sym_hashes (abfd);
6548 local_got_ents = elf_local_got_ents (abfd);
6549
6550 relend = relocs + sec->reloc_count;
6551 for (rel = relocs; rel < relend; rel++)
6552 {
6553 unsigned long r_symndx;
6554 enum elf_ppc64_reloc_type r_type;
6555 struct elf_link_hash_entry *h = NULL;
6556 struct plt_entry **plt_list;
6557 unsigned char tls_type = 0;
6558
6559 r_symndx = ELF64_R_SYM (rel->r_info);
6560 r_type = ELF64_R_TYPE (rel->r_info);
6561 if (r_symndx >= symtab_hdr->sh_info)
6562 {
6563 struct ppc_link_hash_entry *eh;
6564 struct elf_dyn_relocs **pp;
6565 struct elf_dyn_relocs *p;
6566
6567 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
6568 h = elf_follow_link (h);
6569 eh = (struct ppc_link_hash_entry *) h;
6570
6571 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
6572 if (p->sec == sec)
6573 {
6574 /* Everything must go for SEC. */
6575 *pp = p->next;
6576 break;
6577 }
6578 }
6579
6580 switch (r_type)
6581 {
6582 case R_PPC64_GOT_TLSLD16:
6583 case R_PPC64_GOT_TLSLD16_LO:
6584 case R_PPC64_GOT_TLSLD16_HI:
6585 case R_PPC64_GOT_TLSLD16_HA:
6586 tls_type = TLS_TLS | TLS_LD;
6587 goto dogot;
6588
6589 case R_PPC64_GOT_TLSGD16:
6590 case R_PPC64_GOT_TLSGD16_LO:
6591 case R_PPC64_GOT_TLSGD16_HI:
6592 case R_PPC64_GOT_TLSGD16_HA:
6593 tls_type = TLS_TLS | TLS_GD;
6594 goto dogot;
6595
6596 case R_PPC64_GOT_TPREL16_DS:
6597 case R_PPC64_GOT_TPREL16_LO_DS:
6598 case R_PPC64_GOT_TPREL16_HI:
6599 case R_PPC64_GOT_TPREL16_HA:
6600 tls_type = TLS_TLS | TLS_TPREL;
6601 goto dogot;
6602
6603 case R_PPC64_GOT_DTPREL16_DS:
6604 case R_PPC64_GOT_DTPREL16_LO_DS:
6605 case R_PPC64_GOT_DTPREL16_HI:
6606 case R_PPC64_GOT_DTPREL16_HA:
6607 tls_type = TLS_TLS | TLS_DTPREL;
6608 goto dogot;
6609
6610 case R_PPC64_GOT16:
6611 case R_PPC64_GOT16_DS:
6612 case R_PPC64_GOT16_HA:
6613 case R_PPC64_GOT16_HI:
6614 case R_PPC64_GOT16_LO:
6615 case R_PPC64_GOT16_LO_DS:
6616 dogot:
6617 {
6618 struct got_entry *ent;
6619
6620 if (h != NULL)
6621 ent = h->got.glist;
6622 else
6623 ent = local_got_ents[r_symndx];
6624
6625 for (; ent != NULL; ent = ent->next)
6626 if (ent->addend == rel->r_addend
6627 && ent->owner == abfd
6628 && ent->tls_type == tls_type)
6629 break;
6630 if (ent == NULL)
6631 abort ();
6632 if (ent->got.refcount > 0)
6633 ent->got.refcount -= 1;
6634 }
6635 break;
6636
6637 case R_PPC64_PLT16_HA:
6638 case R_PPC64_PLT16_HI:
6639 case R_PPC64_PLT16_LO:
6640 case R_PPC64_PLT32:
6641 case R_PPC64_PLT64:
6642 case R_PPC64_REL14:
6643 case R_PPC64_REL14_BRNTAKEN:
6644 case R_PPC64_REL14_BRTAKEN:
6645 case R_PPC64_REL24:
6646 plt_list = NULL;
6647 if (h != NULL)
6648 plt_list = &h->plt.plist;
6649 else if (local_got_ents != NULL)
6650 {
6651 struct plt_entry **local_plt = (struct plt_entry **)
6652 (local_got_ents + symtab_hdr->sh_info);
6653 unsigned char *local_got_tls_masks = (unsigned char *)
6654 (local_plt + symtab_hdr->sh_info);
6655 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
6656 plt_list = local_plt + r_symndx;
6657 }
6658 if (plt_list)
6659 {
6660 struct plt_entry *ent;
6661
6662 for (ent = *plt_list; ent != NULL; ent = ent->next)
6663 if (ent->addend == rel->r_addend)
6664 break;
6665 if (ent != NULL && ent->plt.refcount > 0)
6666 ent->plt.refcount -= 1;
6667 }
6668 break;
6669
6670 default:
6671 break;
6672 }
6673 }
6674 return TRUE;
6675 }
6676
6677 /* The maximum size of .sfpr. */
6678 #define SFPR_MAX (218*4)
6679
6680 struct sfpr_def_parms
6681 {
6682 const char name[12];
6683 unsigned char lo, hi;
6684 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
6685 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
6686 };
6687
6688 /* Auto-generate _save*, _rest* functions in .sfpr.
6689 If STUB_SEC is non-null, define alias symbols in STUB_SEC
6690 instead. */
6691
6692 static bfd_boolean
6693 sfpr_define (struct bfd_link_info *info,
6694 const struct sfpr_def_parms *parm,
6695 asection *stub_sec)
6696 {
6697 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6698 unsigned int i;
6699 size_t len = strlen (parm->name);
6700 bfd_boolean writing = FALSE;
6701 char sym[16];
6702
6703 if (htab == NULL)
6704 return FALSE;
6705
6706 memcpy (sym, parm->name, len);
6707 sym[len + 2] = 0;
6708
6709 for (i = parm->lo; i <= parm->hi; i++)
6710 {
6711 struct ppc_link_hash_entry *h;
6712
6713 sym[len + 0] = i / 10 + '0';
6714 sym[len + 1] = i % 10 + '0';
6715 h = (struct ppc_link_hash_entry *)
6716 elf_link_hash_lookup (&htab->elf, sym, writing, TRUE, TRUE);
6717 if (stub_sec != NULL)
6718 {
6719 if (h != NULL
6720 && h->elf.root.type == bfd_link_hash_defined
6721 && h->elf.root.u.def.section == htab->sfpr)
6722 {
6723 struct elf_link_hash_entry *s;
6724 char buf[32];
6725 sprintf (buf, "%08x.%s", stub_sec->id & 0xffffffff, sym);
6726 s = elf_link_hash_lookup (&htab->elf, buf, TRUE, TRUE, FALSE);
6727 if (s == NULL)
6728 return FALSE;
6729 if (s->root.type == bfd_link_hash_new
6730 || (s->root.type = bfd_link_hash_defined
6731 && s->root.u.def.section == stub_sec))
6732 {
6733 s->root.type = bfd_link_hash_defined;
6734 s->root.u.def.section = stub_sec;
6735 s->root.u.def.value = (stub_sec->size
6736 + h->elf.root.u.def.value);
6737 s->ref_regular = 1;
6738 s->def_regular = 1;
6739 s->ref_regular_nonweak = 1;
6740 s->forced_local = 1;
6741 s->non_elf = 0;
6742 s->root.linker_def = 1;
6743 }
6744 }
6745 continue;
6746 }
6747 if (h != NULL)
6748 {
6749 h->save_res = 1;
6750 if (!h->elf.def_regular)
6751 {
6752 h->elf.root.type = bfd_link_hash_defined;
6753 h->elf.root.u.def.section = htab->sfpr;
6754 h->elf.root.u.def.value = htab->sfpr->size;
6755 h->elf.type = STT_FUNC;
6756 h->elf.def_regular = 1;
6757 h->elf.non_elf = 0;
6758 _bfd_elf_link_hash_hide_symbol (info, &h->elf, TRUE);
6759 writing = TRUE;
6760 if (htab->sfpr->contents == NULL)
6761 {
6762 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
6763 if (htab->sfpr->contents == NULL)
6764 return FALSE;
6765 }
6766 }
6767 }
6768 if (writing)
6769 {
6770 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
6771 if (i != parm->hi)
6772 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
6773 else
6774 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
6775 htab->sfpr->size = p - htab->sfpr->contents;
6776 }
6777 }
6778
6779 return TRUE;
6780 }
6781
6782 static bfd_byte *
6783 savegpr0 (bfd *abfd, bfd_byte *p, int r)
6784 {
6785 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6786 return p + 4;
6787 }
6788
6789 static bfd_byte *
6790 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
6791 {
6792 p = savegpr0 (abfd, p, r);
6793 bfd_put_32 (abfd, STD_R0_0R1 + STK_LR, p);
6794 p = p + 4;
6795 bfd_put_32 (abfd, BLR, p);
6796 return p + 4;
6797 }
6798
6799 static bfd_byte *
6800 restgpr0 (bfd *abfd, bfd_byte *p, int r)
6801 {
6802 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6803 return p + 4;
6804 }
6805
6806 static bfd_byte *
6807 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
6808 {
6809 bfd_put_32 (abfd, LD_R0_0R1 + STK_LR, p);
6810 p = p + 4;
6811 p = restgpr0 (abfd, p, r);
6812 bfd_put_32 (abfd, MTLR_R0, p);
6813 p = p + 4;
6814 if (r == 29)
6815 {
6816 p = restgpr0 (abfd, p, 30);
6817 p = restgpr0 (abfd, p, 31);
6818 }
6819 bfd_put_32 (abfd, BLR, p);
6820 return p + 4;
6821 }
6822
6823 static bfd_byte *
6824 savegpr1 (bfd *abfd, bfd_byte *p, int r)
6825 {
6826 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6827 return p + 4;
6828 }
6829
6830 static bfd_byte *
6831 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
6832 {
6833 p = savegpr1 (abfd, p, r);
6834 bfd_put_32 (abfd, BLR, p);
6835 return p + 4;
6836 }
6837
6838 static bfd_byte *
6839 restgpr1 (bfd *abfd, bfd_byte *p, int r)
6840 {
6841 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6842 return p + 4;
6843 }
6844
6845 static bfd_byte *
6846 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
6847 {
6848 p = restgpr1 (abfd, p, r);
6849 bfd_put_32 (abfd, BLR, p);
6850 return p + 4;
6851 }
6852
6853 static bfd_byte *
6854 savefpr (bfd *abfd, bfd_byte *p, int r)
6855 {
6856 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6857 return p + 4;
6858 }
6859
6860 static bfd_byte *
6861 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
6862 {
6863 p = savefpr (abfd, p, r);
6864 bfd_put_32 (abfd, STD_R0_0R1 + STK_LR, p);
6865 p = p + 4;
6866 bfd_put_32 (abfd, BLR, p);
6867 return p + 4;
6868 }
6869
6870 static bfd_byte *
6871 restfpr (bfd *abfd, bfd_byte *p, int r)
6872 {
6873 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6874 return p + 4;
6875 }
6876
6877 static bfd_byte *
6878 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
6879 {
6880 bfd_put_32 (abfd, LD_R0_0R1 + STK_LR, p);
6881 p = p + 4;
6882 p = restfpr (abfd, p, r);
6883 bfd_put_32 (abfd, MTLR_R0, p);
6884 p = p + 4;
6885 if (r == 29)
6886 {
6887 p = restfpr (abfd, p, 30);
6888 p = restfpr (abfd, p, 31);
6889 }
6890 bfd_put_32 (abfd, BLR, p);
6891 return p + 4;
6892 }
6893
6894 static bfd_byte *
6895 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
6896 {
6897 p = savefpr (abfd, p, r);
6898 bfd_put_32 (abfd, BLR, p);
6899 return p + 4;
6900 }
6901
6902 static bfd_byte *
6903 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
6904 {
6905 p = restfpr (abfd, p, r);
6906 bfd_put_32 (abfd, BLR, p);
6907 return p + 4;
6908 }
6909
6910 static bfd_byte *
6911 savevr (bfd *abfd, bfd_byte *p, int r)
6912 {
6913 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6914 p = p + 4;
6915 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
6916 return p + 4;
6917 }
6918
6919 static bfd_byte *
6920 savevr_tail (bfd *abfd, bfd_byte *p, int r)
6921 {
6922 p = savevr (abfd, p, r);
6923 bfd_put_32 (abfd, BLR, p);
6924 return p + 4;
6925 }
6926
6927 static bfd_byte *
6928 restvr (bfd *abfd, bfd_byte *p, int r)
6929 {
6930 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6931 p = p + 4;
6932 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
6933 return p + 4;
6934 }
6935
6936 static bfd_byte *
6937 restvr_tail (bfd *abfd, bfd_byte *p, int r)
6938 {
6939 p = restvr (abfd, p, r);
6940 bfd_put_32 (abfd, BLR, p);
6941 return p + 4;
6942 }
6943
6944 /* Called via elf_link_hash_traverse to transfer dynamic linking
6945 information on function code symbol entries to their corresponding
6946 function descriptor symbol entries. */
6947
6948 static bfd_boolean
6949 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
6950 {
6951 struct bfd_link_info *info;
6952 struct ppc_link_hash_table *htab;
6953 struct plt_entry *ent;
6954 struct ppc_link_hash_entry *fh;
6955 struct ppc_link_hash_entry *fdh;
6956 bfd_boolean force_local;
6957
6958 fh = (struct ppc_link_hash_entry *) h;
6959 if (fh->elf.root.type == bfd_link_hash_indirect)
6960 return TRUE;
6961
6962 info = inf;
6963 htab = ppc_hash_table (info);
6964 if (htab == NULL)
6965 return FALSE;
6966
6967 /* Resolve undefined references to dot-symbols as the value
6968 in the function descriptor, if we have one in a regular object.
6969 This is to satisfy cases like ".quad .foo". Calls to functions
6970 in dynamic objects are handled elsewhere. */
6971 if (fh->elf.root.type == bfd_link_hash_undefweak
6972 && fh->was_undefined
6973 && (fdh = defined_func_desc (fh)) != NULL
6974 && get_opd_info (fdh->elf.root.u.def.section) != NULL
6975 && opd_entry_value (fdh->elf.root.u.def.section,
6976 fdh->elf.root.u.def.value,
6977 &fh->elf.root.u.def.section,
6978 &fh->elf.root.u.def.value, FALSE) != (bfd_vma) -1)
6979 {
6980 fh->elf.root.type = fdh->elf.root.type;
6981 fh->elf.forced_local = 1;
6982 fh->elf.def_regular = fdh->elf.def_regular;
6983 fh->elf.def_dynamic = fdh->elf.def_dynamic;
6984 }
6985
6986 /* If this is a function code symbol, transfer dynamic linking
6987 information to the function descriptor symbol. */
6988 if (!fh->is_func)
6989 return TRUE;
6990
6991 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
6992 if (ent->plt.refcount > 0)
6993 break;
6994 if (ent == NULL
6995 || fh->elf.root.root.string[0] != '.'
6996 || fh->elf.root.root.string[1] == '\0')
6997 return TRUE;
6998
6999 /* Find the corresponding function descriptor symbol. Create it
7000 as undefined if necessary. */
7001
7002 fdh = lookup_fdh (fh, htab);
7003 if (fdh == NULL
7004 && !bfd_link_executable (info)
7005 && (fh->elf.root.type == bfd_link_hash_undefined
7006 || fh->elf.root.type == bfd_link_hash_undefweak))
7007 {
7008 fdh = make_fdh (info, fh);
7009 if (fdh == NULL)
7010 return FALSE;
7011 }
7012
7013 /* Fake function descriptors are made undefweak. If the function
7014 code symbol is strong undefined, make the fake sym the same.
7015 If the function code symbol is defined, then force the fake
7016 descriptor local; We can't support overriding of symbols in a
7017 shared library on a fake descriptor. */
7018
7019 if (fdh != NULL
7020 && fdh->fake
7021 && fdh->elf.root.type == bfd_link_hash_undefweak)
7022 {
7023 if (fh->elf.root.type == bfd_link_hash_undefined)
7024 {
7025 fdh->elf.root.type = bfd_link_hash_undefined;
7026 bfd_link_add_undef (&htab->elf.root, &fdh->elf.root);
7027 }
7028 else if (fh->elf.root.type == bfd_link_hash_defined
7029 || fh->elf.root.type == bfd_link_hash_defweak)
7030 {
7031 _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE);
7032 }
7033 }
7034
7035 if (fdh != NULL
7036 && !fdh->elf.forced_local
7037 && (!bfd_link_executable (info)
7038 || fdh->elf.def_dynamic
7039 || fdh->elf.ref_dynamic
7040 || (fdh->elf.root.type == bfd_link_hash_undefweak
7041 && ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT)))
7042 {
7043 if (fdh->elf.dynindx == -1)
7044 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
7045 return FALSE;
7046 fdh->elf.ref_regular |= fh->elf.ref_regular;
7047 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
7048 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
7049 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
7050 if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT)
7051 {
7052 move_plt_plist (fh, fdh);
7053 fdh->elf.needs_plt = 1;
7054 }
7055 fdh->is_func_descriptor = 1;
7056 fdh->oh = fh;
7057 fh->oh = fdh;
7058 }
7059
7060 /* Now that the info is on the function descriptor, clear the
7061 function code sym info. Any function code syms for which we
7062 don't have a definition in a regular file, we force local.
7063 This prevents a shared library from exporting syms that have
7064 been imported from another library. Function code syms that
7065 are really in the library we must leave global to prevent the
7066 linker dragging in a definition from a static library. */
7067 force_local = (!fh->elf.def_regular
7068 || fdh == NULL
7069 || !fdh->elf.def_regular
7070 || fdh->elf.forced_local);
7071 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
7072
7073 return TRUE;
7074 }
7075
7076 static const struct sfpr_def_parms save_res_funcs[] =
7077 {
7078 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
7079 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
7080 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
7081 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
7082 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
7083 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
7084 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
7085 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
7086 { "._savef", 14, 31, savefpr, savefpr1_tail },
7087 { "._restf", 14, 31, restfpr, restfpr1_tail },
7088 { "_savevr_", 20, 31, savevr, savevr_tail },
7089 { "_restvr_", 20, 31, restvr, restvr_tail }
7090 };
7091
7092 /* Called near the start of bfd_elf_size_dynamic_sections. We use
7093 this hook to a) provide some gcc support functions, and b) transfer
7094 dynamic linking information gathered so far on function code symbol
7095 entries, to their corresponding function descriptor symbol entries. */
7096
7097 static bfd_boolean
7098 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
7099 struct bfd_link_info *info)
7100 {
7101 struct ppc_link_hash_table *htab;
7102
7103 htab = ppc_hash_table (info);
7104 if (htab == NULL)
7105 return FALSE;
7106
7107 /* Provide any missing _save* and _rest* functions. */
7108 if (htab->sfpr != NULL)
7109 {
7110 unsigned int i;
7111
7112 htab->sfpr->size = 0;
7113 for (i = 0; i < ARRAY_SIZE (save_res_funcs); i++)
7114 if (!sfpr_define (info, &save_res_funcs[i], NULL))
7115 return FALSE;
7116 if (htab->sfpr->size == 0)
7117 htab->sfpr->flags |= SEC_EXCLUDE;
7118 }
7119
7120 if (bfd_link_relocatable (info))
7121 return TRUE;
7122
7123 if (htab->elf.hgot != NULL)
7124 {
7125 _bfd_elf_link_hash_hide_symbol (info, htab->elf.hgot, TRUE);
7126 /* Make .TOC. defined so as to prevent it being made dynamic.
7127 The wrong value here is fixed later in ppc64_elf_set_toc. */
7128 if (!htab->elf.hgot->def_regular
7129 || htab->elf.hgot->root.type != bfd_link_hash_defined)
7130 {
7131 htab->elf.hgot->root.type = bfd_link_hash_defined;
7132 htab->elf.hgot->root.u.def.value = 0;
7133 htab->elf.hgot->root.u.def.section = bfd_abs_section_ptr;
7134 htab->elf.hgot->def_regular = 1;
7135 htab->elf.hgot->root.linker_def = 1;
7136 }
7137 htab->elf.hgot->type = STT_OBJECT;
7138 htab->elf.hgot->other = ((htab->elf.hgot->other & ~ELF_ST_VISIBILITY (-1))
7139 | STV_HIDDEN);
7140 }
7141
7142 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
7143
7144 return TRUE;
7145 }
7146
7147 /* Return true if we have dynamic relocs against H that apply to
7148 read-only sections. */
7149
7150 static bfd_boolean
7151 readonly_dynrelocs (struct elf_link_hash_entry *h)
7152 {
7153 struct ppc_link_hash_entry *eh;
7154 struct elf_dyn_relocs *p;
7155
7156 eh = (struct ppc_link_hash_entry *) h;
7157 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7158 {
7159 asection *s = p->sec->output_section;
7160
7161 if (s != NULL && (s->flags & SEC_READONLY) != 0)
7162 return TRUE;
7163 }
7164 return FALSE;
7165 }
7166
7167 /* Return true if we have dynamic relocs against H or any of its weak
7168 aliases, that apply to read-only sections. */
7169
7170 static bfd_boolean
7171 alias_readonly_dynrelocs (struct elf_link_hash_entry *h)
7172 {
7173 struct ppc_link_hash_entry *eh;
7174
7175 eh = (struct ppc_link_hash_entry *) h;
7176 do
7177 {
7178 if (readonly_dynrelocs (&eh->elf))
7179 return TRUE;
7180 eh = eh->weakref;
7181 } while (eh != NULL && &eh->elf != h);
7182
7183 return FALSE;
7184 }
7185
7186 /* Return whether EH has pc-relative dynamic relocs. */
7187
7188 static bfd_boolean
7189 pc_dynrelocs (struct ppc_link_hash_entry *eh)
7190 {
7191 struct elf_dyn_relocs *p;
7192
7193 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7194 if (p->pc_count != 0)
7195 return TRUE;
7196 return FALSE;
7197 }
7198
7199 /* Return true if a global entry stub will be created for H. Valid
7200 for ELFv2 before plt entries have been allocated. */
7201
7202 static bfd_boolean
7203 global_entry_stub (struct elf_link_hash_entry *h)
7204 {
7205 struct plt_entry *pent;
7206
7207 if (!h->pointer_equality_needed
7208 || h->def_regular)
7209 return FALSE;
7210
7211 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
7212 if (pent->plt.refcount > 0
7213 && pent->addend == 0)
7214 return TRUE;
7215
7216 return FALSE;
7217 }
7218
7219 /* Adjust a symbol defined by a dynamic object and referenced by a
7220 regular object. The current definition is in some section of the
7221 dynamic object, but we're not including those sections. We have to
7222 change the definition to something the rest of the link can
7223 understand. */
7224
7225 static bfd_boolean
7226 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
7227 struct elf_link_hash_entry *h)
7228 {
7229 struct ppc_link_hash_table *htab;
7230 asection *s;
7231
7232 htab = ppc_hash_table (info);
7233 if (htab == NULL)
7234 return FALSE;
7235
7236 /* Deal with function syms. */
7237 if (h->type == STT_FUNC
7238 || h->type == STT_GNU_IFUNC
7239 || h->needs_plt)
7240 {
7241 /* Clear procedure linkage table information for any symbol that
7242 won't need a .plt entry. */
7243 struct plt_entry *ent;
7244 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
7245 if (ent->plt.refcount > 0)
7246 break;
7247 if (ent == NULL
7248 || (h->type != STT_GNU_IFUNC
7249 && (SYMBOL_CALLS_LOCAL (info, h)
7250 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
7251 && h->root.type == bfd_link_hash_undefweak)))
7252 || ((struct ppc_link_hash_entry *) h)->save_res)
7253 {
7254 h->plt.plist = NULL;
7255 h->needs_plt = 0;
7256 h->pointer_equality_needed = 0;
7257 }
7258 else if (abiversion (info->output_bfd) >= 2)
7259 {
7260 /* Taking a function's address in a read/write section
7261 doesn't require us to define the function symbol in the
7262 executable on a global entry stub. A dynamic reloc can
7263 be used instead. The reason we prefer a few more dynamic
7264 relocs is that calling via a global entry stub costs a
7265 few more instructions, and pointer_equality_needed causes
7266 extra work in ld.so when resolving these symbols. */
7267 if (global_entry_stub (h)
7268 && !alias_readonly_dynrelocs (h))
7269 {
7270 h->pointer_equality_needed = 0;
7271 /* After adjust_dynamic_symbol, non_got_ref set in
7272 the non-pic case means that dyn_relocs for this
7273 symbol should be discarded. */
7274 h->non_got_ref = 0;
7275 }
7276
7277 /* If making a plt entry, then we don't need copy relocs. */
7278 return TRUE;
7279 }
7280 }
7281 else
7282 h->plt.plist = NULL;
7283
7284 /* If this is a weak symbol, and there is a real definition, the
7285 processor independent code will have arranged for us to see the
7286 real definition first, and we can just use the same value. */
7287 if (h->u.weakdef != NULL)
7288 {
7289 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
7290 || h->u.weakdef->root.type == bfd_link_hash_defweak);
7291 h->root.u.def.section = h->u.weakdef->root.u.def.section;
7292 h->root.u.def.value = h->u.weakdef->root.u.def.value;
7293 if (ELIMINATE_COPY_RELOCS)
7294 h->non_got_ref = h->u.weakdef->non_got_ref;
7295 return TRUE;
7296 }
7297
7298 /* If we are creating a shared library, we must presume that the
7299 only references to the symbol are via the global offset table.
7300 For such cases we need not do anything here; the relocations will
7301 be handled correctly by relocate_section. */
7302 if (bfd_link_pic (info))
7303 return TRUE;
7304
7305 /* If there are no references to this symbol that do not use the
7306 GOT, we don't need to generate a copy reloc. */
7307 if (!h->non_got_ref)
7308 return TRUE;
7309
7310 /* Don't generate a copy reloc for symbols defined in the executable. */
7311 if (!h->def_dynamic || !h->ref_regular || h->def_regular
7312
7313 /* If -z nocopyreloc was given, don't generate them either. */
7314 || info->nocopyreloc
7315
7316 /* If we didn't find any dynamic relocs in read-only sections, then
7317 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
7318 || (ELIMINATE_COPY_RELOCS && !alias_readonly_dynrelocs (h))
7319
7320 /* Protected variables do not work with .dynbss. The copy in
7321 .dynbss won't be used by the shared library with the protected
7322 definition for the variable. Text relocations are preferable
7323 to an incorrect program. */
7324 || h->protected_def)
7325 {
7326 h->non_got_ref = 0;
7327 return TRUE;
7328 }
7329
7330 if (h->plt.plist != NULL)
7331 {
7332 /* We should never get here, but unfortunately there are versions
7333 of gcc out there that improperly (for this ABI) put initialized
7334 function pointers, vtable refs and suchlike in read-only
7335 sections. Allow them to proceed, but warn that this might
7336 break at runtime. */
7337 info->callbacks->einfo
7338 (_("%P: copy reloc against `%T' requires lazy plt linking; "
7339 "avoid setting LD_BIND_NOW=1 or upgrade gcc\n"),
7340 h->root.root.string);
7341 }
7342
7343 /* This is a reference to a symbol defined by a dynamic object which
7344 is not a function. */
7345
7346 /* We must allocate the symbol in our .dynbss section, which will
7347 become part of the .bss section of the executable. There will be
7348 an entry for this symbol in the .dynsym section. The dynamic
7349 object will contain position independent code, so all references
7350 from the dynamic object to this symbol will go through the global
7351 offset table. The dynamic linker will use the .dynsym entry to
7352 determine the address it must put in the global offset table, so
7353 both the dynamic object and the regular object will refer to the
7354 same memory location for the variable. */
7355
7356 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
7357 to copy the initial value out of the dynamic object and into the
7358 runtime process image. We need to remember the offset into the
7359 .rela.bss section we are going to use. */
7360 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
7361 {
7362 htab->relbss->size += sizeof (Elf64_External_Rela);
7363 h->needs_copy = 1;
7364 }
7365
7366 s = htab->dynbss;
7367
7368 return _bfd_elf_adjust_dynamic_copy (info, h, s);
7369 }
7370
7371 /* If given a function descriptor symbol, hide both the function code
7372 sym and the descriptor. */
7373 static void
7374 ppc64_elf_hide_symbol (struct bfd_link_info *info,
7375 struct elf_link_hash_entry *h,
7376 bfd_boolean force_local)
7377 {
7378 struct ppc_link_hash_entry *eh;
7379 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
7380
7381 eh = (struct ppc_link_hash_entry *) h;
7382 if (eh->is_func_descriptor)
7383 {
7384 struct ppc_link_hash_entry *fh = eh->oh;
7385
7386 if (fh == NULL)
7387 {
7388 const char *p, *q;
7389 struct ppc_link_hash_table *htab;
7390 char save;
7391
7392 /* We aren't supposed to use alloca in BFD because on
7393 systems which do not have alloca the version in libiberty
7394 calls xmalloc, which might cause the program to crash
7395 when it runs out of memory. This function doesn't have a
7396 return status, so there's no way to gracefully return an
7397 error. So cheat. We know that string[-1] can be safely
7398 accessed; It's either a string in an ELF string table,
7399 or allocated in an objalloc structure. */
7400
7401 p = eh->elf.root.root.string - 1;
7402 save = *p;
7403 *(char *) p = '.';
7404 htab = ppc_hash_table (info);
7405 if (htab == NULL)
7406 return;
7407
7408 fh = (struct ppc_link_hash_entry *)
7409 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
7410 *(char *) p = save;
7411
7412 /* Unfortunately, if it so happens that the string we were
7413 looking for was allocated immediately before this string,
7414 then we overwrote the string terminator. That's the only
7415 reason the lookup should fail. */
7416 if (fh == NULL)
7417 {
7418 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
7419 while (q >= eh->elf.root.root.string && *q == *p)
7420 --q, --p;
7421 if (q < eh->elf.root.root.string && *p == '.')
7422 fh = (struct ppc_link_hash_entry *)
7423 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
7424 }
7425 if (fh != NULL)
7426 {
7427 eh->oh = fh;
7428 fh->oh = eh;
7429 }
7430 }
7431 if (fh != NULL)
7432 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
7433 }
7434 }
7435
7436 static bfd_boolean
7437 get_sym_h (struct elf_link_hash_entry **hp,
7438 Elf_Internal_Sym **symp,
7439 asection **symsecp,
7440 unsigned char **tls_maskp,
7441 Elf_Internal_Sym **locsymsp,
7442 unsigned long r_symndx,
7443 bfd *ibfd)
7444 {
7445 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
7446
7447 if (r_symndx >= symtab_hdr->sh_info)
7448 {
7449 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
7450 struct elf_link_hash_entry *h;
7451
7452 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
7453 h = elf_follow_link (h);
7454
7455 if (hp != NULL)
7456 *hp = h;
7457
7458 if (symp != NULL)
7459 *symp = NULL;
7460
7461 if (symsecp != NULL)
7462 {
7463 asection *symsec = NULL;
7464 if (h->root.type == bfd_link_hash_defined
7465 || h->root.type == bfd_link_hash_defweak)
7466 symsec = h->root.u.def.section;
7467 *symsecp = symsec;
7468 }
7469
7470 if (tls_maskp != NULL)
7471 {
7472 struct ppc_link_hash_entry *eh;
7473
7474 eh = (struct ppc_link_hash_entry *) h;
7475 *tls_maskp = &eh->tls_mask;
7476 }
7477 }
7478 else
7479 {
7480 Elf_Internal_Sym *sym;
7481 Elf_Internal_Sym *locsyms = *locsymsp;
7482
7483 if (locsyms == NULL)
7484 {
7485 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
7486 if (locsyms == NULL)
7487 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
7488 symtab_hdr->sh_info,
7489 0, NULL, NULL, NULL);
7490 if (locsyms == NULL)
7491 return FALSE;
7492 *locsymsp = locsyms;
7493 }
7494 sym = locsyms + r_symndx;
7495
7496 if (hp != NULL)
7497 *hp = NULL;
7498
7499 if (symp != NULL)
7500 *symp = sym;
7501
7502 if (symsecp != NULL)
7503 *symsecp = bfd_section_from_elf_index (ibfd, sym->st_shndx);
7504
7505 if (tls_maskp != NULL)
7506 {
7507 struct got_entry **lgot_ents;
7508 unsigned char *tls_mask;
7509
7510 tls_mask = NULL;
7511 lgot_ents = elf_local_got_ents (ibfd);
7512 if (lgot_ents != NULL)
7513 {
7514 struct plt_entry **local_plt = (struct plt_entry **)
7515 (lgot_ents + symtab_hdr->sh_info);
7516 unsigned char *lgot_masks = (unsigned char *)
7517 (local_plt + symtab_hdr->sh_info);
7518 tls_mask = &lgot_masks[r_symndx];
7519 }
7520 *tls_maskp = tls_mask;
7521 }
7522 }
7523 return TRUE;
7524 }
7525
7526 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
7527 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
7528 type suitable for optimization, and 1 otherwise. */
7529
7530 static int
7531 get_tls_mask (unsigned char **tls_maskp,
7532 unsigned long *toc_symndx,
7533 bfd_vma *toc_addend,
7534 Elf_Internal_Sym **locsymsp,
7535 const Elf_Internal_Rela *rel,
7536 bfd *ibfd)
7537 {
7538 unsigned long r_symndx;
7539 int next_r;
7540 struct elf_link_hash_entry *h;
7541 Elf_Internal_Sym *sym;
7542 asection *sec;
7543 bfd_vma off;
7544
7545 r_symndx = ELF64_R_SYM (rel->r_info);
7546 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
7547 return 0;
7548
7549 if ((*tls_maskp != NULL && **tls_maskp != 0)
7550 || sec == NULL
7551 || ppc64_elf_section_data (sec) == NULL
7552 || ppc64_elf_section_data (sec)->sec_type != sec_toc)
7553 return 1;
7554
7555 /* Look inside a TOC section too. */
7556 if (h != NULL)
7557 {
7558 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
7559 off = h->root.u.def.value;
7560 }
7561 else
7562 off = sym->st_value;
7563 off += rel->r_addend;
7564 BFD_ASSERT (off % 8 == 0);
7565 r_symndx = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8];
7566 next_r = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8 + 1];
7567 if (toc_symndx != NULL)
7568 *toc_symndx = r_symndx;
7569 if (toc_addend != NULL)
7570 *toc_addend = ppc64_elf_section_data (sec)->u.toc.add[off / 8];
7571 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
7572 return 0;
7573 if ((h == NULL || is_static_defined (h))
7574 && (next_r == -1 || next_r == -2))
7575 return 1 - next_r;
7576 return 1;
7577 }
7578
7579 /* Find (or create) an entry in the tocsave hash table. */
7580
7581 static struct tocsave_entry *
7582 tocsave_find (struct ppc_link_hash_table *htab,
7583 enum insert_option insert,
7584 Elf_Internal_Sym **local_syms,
7585 const Elf_Internal_Rela *irela,
7586 bfd *ibfd)
7587 {
7588 unsigned long r_indx;
7589 struct elf_link_hash_entry *h;
7590 Elf_Internal_Sym *sym;
7591 struct tocsave_entry ent, *p;
7592 hashval_t hash;
7593 struct tocsave_entry **slot;
7594
7595 r_indx = ELF64_R_SYM (irela->r_info);
7596 if (!get_sym_h (&h, &sym, &ent.sec, NULL, local_syms, r_indx, ibfd))
7597 return NULL;
7598 if (ent.sec == NULL || ent.sec->output_section == NULL)
7599 {
7600 (*_bfd_error_handler)
7601 (_("%B: undefined symbol on R_PPC64_TOCSAVE relocation"));
7602 return NULL;
7603 }
7604
7605 if (h != NULL)
7606 ent.offset = h->root.u.def.value;
7607 else
7608 ent.offset = sym->st_value;
7609 ent.offset += irela->r_addend;
7610
7611 hash = tocsave_htab_hash (&ent);
7612 slot = ((struct tocsave_entry **)
7613 htab_find_slot_with_hash (htab->tocsave_htab, &ent, hash, insert));
7614 if (slot == NULL)
7615 return NULL;
7616
7617 if (*slot == NULL)
7618 {
7619 p = (struct tocsave_entry *) bfd_alloc (ibfd, sizeof (*p));
7620 if (p == NULL)
7621 return NULL;
7622 *p = ent;
7623 *slot = p;
7624 }
7625 return *slot;
7626 }
7627
7628 /* Adjust all global syms defined in opd sections. In gcc generated
7629 code for the old ABI, these will already have been done. */
7630
7631 static bfd_boolean
7632 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
7633 {
7634 struct ppc_link_hash_entry *eh;
7635 asection *sym_sec;
7636 struct _opd_sec_data *opd;
7637
7638 if (h->root.type == bfd_link_hash_indirect)
7639 return TRUE;
7640
7641 if (h->root.type != bfd_link_hash_defined
7642 && h->root.type != bfd_link_hash_defweak)
7643 return TRUE;
7644
7645 eh = (struct ppc_link_hash_entry *) h;
7646 if (eh->adjust_done)
7647 return TRUE;
7648
7649 sym_sec = eh->elf.root.u.def.section;
7650 opd = get_opd_info (sym_sec);
7651 if (opd != NULL && opd->adjust != NULL)
7652 {
7653 long adjust = opd->adjust[OPD_NDX (eh->elf.root.u.def.value)];
7654 if (adjust == -1)
7655 {
7656 /* This entry has been deleted. */
7657 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
7658 if (dsec == NULL)
7659 {
7660 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
7661 if (discarded_section (dsec))
7662 {
7663 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
7664 break;
7665 }
7666 }
7667 eh->elf.root.u.def.value = 0;
7668 eh->elf.root.u.def.section = dsec;
7669 }
7670 else
7671 eh->elf.root.u.def.value += adjust;
7672 eh->adjust_done = 1;
7673 }
7674 return TRUE;
7675 }
7676
7677 /* Handles decrementing dynamic reloc counts for the reloc specified by
7678 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM
7679 have already been determined. */
7680
7681 static bfd_boolean
7682 dec_dynrel_count (bfd_vma r_info,
7683 asection *sec,
7684 struct bfd_link_info *info,
7685 Elf_Internal_Sym **local_syms,
7686 struct elf_link_hash_entry *h,
7687 Elf_Internal_Sym *sym)
7688 {
7689 enum elf_ppc64_reloc_type r_type;
7690 asection *sym_sec = NULL;
7691
7692 /* Can this reloc be dynamic? This switch, and later tests here
7693 should be kept in sync with the code in check_relocs. */
7694 r_type = ELF64_R_TYPE (r_info);
7695 switch (r_type)
7696 {
7697 default:
7698 return TRUE;
7699
7700 case R_PPC64_TPREL16:
7701 case R_PPC64_TPREL16_LO:
7702 case R_PPC64_TPREL16_HI:
7703 case R_PPC64_TPREL16_HA:
7704 case R_PPC64_TPREL16_DS:
7705 case R_PPC64_TPREL16_LO_DS:
7706 case R_PPC64_TPREL16_HIGH:
7707 case R_PPC64_TPREL16_HIGHA:
7708 case R_PPC64_TPREL16_HIGHER:
7709 case R_PPC64_TPREL16_HIGHERA:
7710 case R_PPC64_TPREL16_HIGHEST:
7711 case R_PPC64_TPREL16_HIGHESTA:
7712 if (!bfd_link_pic (info))
7713 return TRUE;
7714
7715 case R_PPC64_TPREL64:
7716 case R_PPC64_DTPMOD64:
7717 case R_PPC64_DTPREL64:
7718 case R_PPC64_ADDR64:
7719 case R_PPC64_REL30:
7720 case R_PPC64_REL32:
7721 case R_PPC64_REL64:
7722 case R_PPC64_ADDR14:
7723 case R_PPC64_ADDR14_BRNTAKEN:
7724 case R_PPC64_ADDR14_BRTAKEN:
7725 case R_PPC64_ADDR16:
7726 case R_PPC64_ADDR16_DS:
7727 case R_PPC64_ADDR16_HA:
7728 case R_PPC64_ADDR16_HI:
7729 case R_PPC64_ADDR16_HIGH:
7730 case R_PPC64_ADDR16_HIGHA:
7731 case R_PPC64_ADDR16_HIGHER:
7732 case R_PPC64_ADDR16_HIGHERA:
7733 case R_PPC64_ADDR16_HIGHEST:
7734 case R_PPC64_ADDR16_HIGHESTA:
7735 case R_PPC64_ADDR16_LO:
7736 case R_PPC64_ADDR16_LO_DS:
7737 case R_PPC64_ADDR24:
7738 case R_PPC64_ADDR32:
7739 case R_PPC64_UADDR16:
7740 case R_PPC64_UADDR32:
7741 case R_PPC64_UADDR64:
7742 case R_PPC64_TOC:
7743 break;
7744 }
7745
7746 if (local_syms != NULL)
7747 {
7748 unsigned long r_symndx;
7749 bfd *ibfd = sec->owner;
7750
7751 r_symndx = ELF64_R_SYM (r_info);
7752 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
7753 return FALSE;
7754 }
7755
7756 if ((bfd_link_pic (info)
7757 && (must_be_dyn_reloc (info, r_type)
7758 || (h != NULL
7759 && (!SYMBOLIC_BIND (info, h)
7760 || h->root.type == bfd_link_hash_defweak
7761 || !h->def_regular))))
7762 || (ELIMINATE_COPY_RELOCS
7763 && !bfd_link_pic (info)
7764 && h != NULL
7765 && (h->root.type == bfd_link_hash_defweak
7766 || !h->def_regular)))
7767 ;
7768 else
7769 return TRUE;
7770
7771 if (h != NULL)
7772 {
7773 struct elf_dyn_relocs *p;
7774 struct elf_dyn_relocs **pp;
7775 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
7776
7777 /* elf_gc_sweep may have already removed all dyn relocs associated
7778 with local syms for a given section. Also, symbol flags are
7779 changed by elf_gc_sweep_symbol, confusing the test above. Don't
7780 report a dynreloc miscount. */
7781 if (*pp == NULL && info->gc_sections)
7782 return TRUE;
7783
7784 while ((p = *pp) != NULL)
7785 {
7786 if (p->sec == sec)
7787 {
7788 if (!must_be_dyn_reloc (info, r_type))
7789 p->pc_count -= 1;
7790 p->count -= 1;
7791 if (p->count == 0)
7792 *pp = p->next;
7793 return TRUE;
7794 }
7795 pp = &p->next;
7796 }
7797 }
7798 else
7799 {
7800 struct ppc_dyn_relocs *p;
7801 struct ppc_dyn_relocs **pp;
7802 void *vpp;
7803 bfd_boolean is_ifunc;
7804
7805 if (local_syms == NULL)
7806 sym_sec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
7807 if (sym_sec == NULL)
7808 sym_sec = sec;
7809
7810 vpp = &elf_section_data (sym_sec)->local_dynrel;
7811 pp = (struct ppc_dyn_relocs **) vpp;
7812
7813 if (*pp == NULL && info->gc_sections)
7814 return TRUE;
7815
7816 is_ifunc = ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC;
7817 while ((p = *pp) != NULL)
7818 {
7819 if (p->sec == sec && p->ifunc == is_ifunc)
7820 {
7821 p->count -= 1;
7822 if (p->count == 0)
7823 *pp = p->next;
7824 return TRUE;
7825 }
7826 pp = &p->next;
7827 }
7828 }
7829
7830 info->callbacks->einfo (_("%P: dynreloc miscount for %B, section %A\n"),
7831 sec->owner, sec);
7832 bfd_set_error (bfd_error_bad_value);
7833 return FALSE;
7834 }
7835
7836 /* Remove unused Official Procedure Descriptor entries. Currently we
7837 only remove those associated with functions in discarded link-once
7838 sections, or weakly defined functions that have been overridden. It
7839 would be possible to remove many more entries for statically linked
7840 applications. */
7841
7842 bfd_boolean
7843 ppc64_elf_edit_opd (struct bfd_link_info *info)
7844 {
7845 bfd *ibfd;
7846 bfd_boolean some_edited = FALSE;
7847 asection *need_pad = NULL;
7848 struct ppc_link_hash_table *htab;
7849
7850 htab = ppc_hash_table (info);
7851 if (htab == NULL)
7852 return FALSE;
7853
7854 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
7855 {
7856 asection *sec;
7857 Elf_Internal_Rela *relstart, *rel, *relend;
7858 Elf_Internal_Shdr *symtab_hdr;
7859 Elf_Internal_Sym *local_syms;
7860 struct _opd_sec_data *opd;
7861 bfd_boolean need_edit, add_aux_fields, broken;
7862 bfd_size_type cnt_16b = 0;
7863
7864 if (!is_ppc64_elf (ibfd))
7865 continue;
7866
7867 sec = bfd_get_section_by_name (ibfd, ".opd");
7868 if (sec == NULL || sec->size == 0)
7869 continue;
7870
7871 if (sec->sec_info_type == SEC_INFO_TYPE_JUST_SYMS)
7872 continue;
7873
7874 if (sec->output_section == bfd_abs_section_ptr)
7875 continue;
7876
7877 /* Look through the section relocs. */
7878 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
7879 continue;
7880
7881 local_syms = NULL;
7882 symtab_hdr = &elf_symtab_hdr (ibfd);
7883
7884 /* Read the relocations. */
7885 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7886 info->keep_memory);
7887 if (relstart == NULL)
7888 return FALSE;
7889
7890 /* First run through the relocs to check they are sane, and to
7891 determine whether we need to edit this opd section. */
7892 need_edit = FALSE;
7893 broken = FALSE;
7894 need_pad = sec;
7895 relend = relstart + sec->reloc_count;
7896 for (rel = relstart; rel < relend; )
7897 {
7898 enum elf_ppc64_reloc_type r_type;
7899 unsigned long r_symndx;
7900 asection *sym_sec;
7901 struct elf_link_hash_entry *h;
7902 Elf_Internal_Sym *sym;
7903 bfd_vma offset;
7904
7905 /* .opd contains an array of 16 or 24 byte entries. We're
7906 only interested in the reloc pointing to a function entry
7907 point. */
7908 offset = rel->r_offset;
7909 if (rel + 1 == relend
7910 || rel[1].r_offset != offset + 8)
7911 {
7912 /* If someone messes with .opd alignment then after a
7913 "ld -r" we might have padding in the middle of .opd.
7914 Also, there's nothing to prevent someone putting
7915 something silly in .opd with the assembler. No .opd
7916 optimization for them! */
7917 broken_opd:
7918 (*_bfd_error_handler)
7919 (_("%B: .opd is not a regular array of opd entries"), ibfd);
7920 broken = TRUE;
7921 break;
7922 }
7923
7924 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
7925 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
7926 {
7927 (*_bfd_error_handler)
7928 (_("%B: unexpected reloc type %u in .opd section"),
7929 ibfd, r_type);
7930 broken = TRUE;
7931 break;
7932 }
7933
7934 r_symndx = ELF64_R_SYM (rel->r_info);
7935 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7936 r_symndx, ibfd))
7937 goto error_ret;
7938
7939 if (sym_sec == NULL || sym_sec->owner == NULL)
7940 {
7941 const char *sym_name;
7942 if (h != NULL)
7943 sym_name = h->root.root.string;
7944 else
7945 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
7946 sym_sec);
7947
7948 (*_bfd_error_handler)
7949 (_("%B: undefined sym `%s' in .opd section"),
7950 ibfd, sym_name);
7951 broken = TRUE;
7952 break;
7953 }
7954
7955 /* opd entries are always for functions defined in the
7956 current input bfd. If the symbol isn't defined in the
7957 input bfd, then we won't be using the function in this
7958 bfd; It must be defined in a linkonce section in another
7959 bfd, or is weak. It's also possible that we are
7960 discarding the function due to a linker script /DISCARD/,
7961 which we test for via the output_section. */
7962 if (sym_sec->owner != ibfd
7963 || sym_sec->output_section == bfd_abs_section_ptr)
7964 need_edit = TRUE;
7965
7966 rel += 2;
7967 if (rel + 1 == relend
7968 || (rel + 2 < relend
7969 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC))
7970 ++rel;
7971
7972 if (rel == relend)
7973 {
7974 if (sec->size == offset + 24)
7975 {
7976 need_pad = NULL;
7977 break;
7978 }
7979 if (sec->size == offset + 16)
7980 {
7981 cnt_16b++;
7982 break;
7983 }
7984 goto broken_opd;
7985 }
7986 else if (rel + 1 < relend
7987 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
7988 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
7989 {
7990 if (rel[0].r_offset == offset + 16)
7991 cnt_16b++;
7992 else if (rel[0].r_offset != offset + 24)
7993 goto broken_opd;
7994 }
7995 else
7996 goto broken_opd;
7997 }
7998
7999 add_aux_fields = htab->params->non_overlapping_opd && cnt_16b > 0;
8000
8001 if (!broken && (need_edit || add_aux_fields))
8002 {
8003 Elf_Internal_Rela *write_rel;
8004 Elf_Internal_Shdr *rel_hdr;
8005 bfd_byte *rptr, *wptr;
8006 bfd_byte *new_contents;
8007 bfd_size_type amt;
8008
8009 new_contents = NULL;
8010 amt = OPD_NDX (sec->size) * sizeof (long);
8011 opd = &ppc64_elf_section_data (sec)->u.opd;
8012 opd->adjust = bfd_zalloc (sec->owner, amt);
8013 if (opd->adjust == NULL)
8014 return FALSE;
8015 ppc64_elf_section_data (sec)->sec_type = sec_opd;
8016
8017 /* This seems a waste of time as input .opd sections are all
8018 zeros as generated by gcc, but I suppose there's no reason
8019 this will always be so. We might start putting something in
8020 the third word of .opd entries. */
8021 if ((sec->flags & SEC_IN_MEMORY) == 0)
8022 {
8023 bfd_byte *loc;
8024 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
8025 {
8026 if (loc != NULL)
8027 free (loc);
8028 error_ret:
8029 if (local_syms != NULL
8030 && symtab_hdr->contents != (unsigned char *) local_syms)
8031 free (local_syms);
8032 if (elf_section_data (sec)->relocs != relstart)
8033 free (relstart);
8034 return FALSE;
8035 }
8036 sec->contents = loc;
8037 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
8038 }
8039
8040 elf_section_data (sec)->relocs = relstart;
8041
8042 new_contents = sec->contents;
8043 if (add_aux_fields)
8044 {
8045 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
8046 if (new_contents == NULL)
8047 return FALSE;
8048 need_pad = NULL;
8049 }
8050 wptr = new_contents;
8051 rptr = sec->contents;
8052 write_rel = relstart;
8053 for (rel = relstart; rel < relend; )
8054 {
8055 unsigned long r_symndx;
8056 asection *sym_sec;
8057 struct elf_link_hash_entry *h;
8058 struct ppc_link_hash_entry *fdh = NULL;
8059 Elf_Internal_Sym *sym;
8060 long opd_ent_size;
8061 Elf_Internal_Rela *next_rel;
8062 bfd_boolean skip;
8063
8064 r_symndx = ELF64_R_SYM (rel->r_info);
8065 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8066 r_symndx, ibfd))
8067 goto error_ret;
8068
8069 next_rel = rel + 2;
8070 if (next_rel + 1 == relend
8071 || (next_rel + 2 < relend
8072 && ELF64_R_TYPE (next_rel[2].r_info) == R_PPC64_TOC))
8073 ++next_rel;
8074
8075 /* See if the .opd entry is full 24 byte or
8076 16 byte (with fd_aux entry overlapped with next
8077 fd_func). */
8078 opd_ent_size = 24;
8079 if (next_rel == relend)
8080 {
8081 if (sec->size == rel->r_offset + 16)
8082 opd_ent_size = 16;
8083 }
8084 else if (next_rel->r_offset == rel->r_offset + 16)
8085 opd_ent_size = 16;
8086
8087 if (h != NULL
8088 && h->root.root.string[0] == '.')
8089 {
8090 fdh = lookup_fdh ((struct ppc_link_hash_entry *) h, htab);
8091 if (fdh != NULL
8092 && fdh->elf.root.type != bfd_link_hash_defined
8093 && fdh->elf.root.type != bfd_link_hash_defweak)
8094 fdh = NULL;
8095 }
8096
8097 skip = (sym_sec->owner != ibfd
8098 || sym_sec->output_section == bfd_abs_section_ptr);
8099 if (skip)
8100 {
8101 if (fdh != NULL && sym_sec->owner == ibfd)
8102 {
8103 /* Arrange for the function descriptor sym
8104 to be dropped. */
8105 fdh->elf.root.u.def.value = 0;
8106 fdh->elf.root.u.def.section = sym_sec;
8107 }
8108 opd->adjust[OPD_NDX (rel->r_offset)] = -1;
8109
8110 if (NO_OPD_RELOCS || bfd_link_relocatable (info))
8111 rel = next_rel;
8112 else
8113 while (1)
8114 {
8115 if (!dec_dynrel_count (rel->r_info, sec, info,
8116 NULL, h, sym))
8117 goto error_ret;
8118
8119 if (++rel == next_rel)
8120 break;
8121
8122 r_symndx = ELF64_R_SYM (rel->r_info);
8123 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8124 r_symndx, ibfd))
8125 goto error_ret;
8126 }
8127 }
8128 else
8129 {
8130 /* We'll be keeping this opd entry. */
8131 long adjust;
8132
8133 if (fdh != NULL)
8134 {
8135 /* Redefine the function descriptor symbol to
8136 this location in the opd section. It is
8137 necessary to update the value here rather
8138 than using an array of adjustments as we do
8139 for local symbols, because various places
8140 in the generic ELF code use the value
8141 stored in u.def.value. */
8142 fdh->elf.root.u.def.value = wptr - new_contents;
8143 fdh->adjust_done = 1;
8144 }
8145
8146 /* Local syms are a bit tricky. We could
8147 tweak them as they can be cached, but
8148 we'd need to look through the local syms
8149 for the function descriptor sym which we
8150 don't have at the moment. So keep an
8151 array of adjustments. */
8152 adjust = (wptr - new_contents) - (rptr - sec->contents);
8153 opd->adjust[OPD_NDX (rel->r_offset)] = adjust;
8154
8155 if (wptr != rptr)
8156 memcpy (wptr, rptr, opd_ent_size);
8157 wptr += opd_ent_size;
8158 if (add_aux_fields && opd_ent_size == 16)
8159 {
8160 memset (wptr, '\0', 8);
8161 wptr += 8;
8162 }
8163
8164 /* We need to adjust any reloc offsets to point to the
8165 new opd entries. */
8166 for ( ; rel != next_rel; ++rel)
8167 {
8168 rel->r_offset += adjust;
8169 if (write_rel != rel)
8170 memcpy (write_rel, rel, sizeof (*rel));
8171 ++write_rel;
8172 }
8173 }
8174
8175 rptr += opd_ent_size;
8176 }
8177
8178 sec->size = wptr - new_contents;
8179 sec->reloc_count = write_rel - relstart;
8180 if (add_aux_fields)
8181 {
8182 free (sec->contents);
8183 sec->contents = new_contents;
8184 }
8185
8186 /* Fudge the header size too, as this is used later in
8187 elf_bfd_final_link if we are emitting relocs. */
8188 rel_hdr = _bfd_elf_single_rel_hdr (sec);
8189 rel_hdr->sh_size = sec->reloc_count * rel_hdr->sh_entsize;
8190 some_edited = TRUE;
8191 }
8192 else if (elf_section_data (sec)->relocs != relstart)
8193 free (relstart);
8194
8195 if (local_syms != NULL
8196 && symtab_hdr->contents != (unsigned char *) local_syms)
8197 {
8198 if (!info->keep_memory)
8199 free (local_syms);
8200 else
8201 symtab_hdr->contents = (unsigned char *) local_syms;
8202 }
8203 }
8204
8205 if (some_edited)
8206 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
8207
8208 /* If we are doing a final link and the last .opd entry is just 16 byte
8209 long, add a 8 byte padding after it. */
8210 if (need_pad != NULL && !bfd_link_relocatable (info))
8211 {
8212 bfd_byte *p;
8213
8214 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
8215 {
8216 BFD_ASSERT (need_pad->size > 0);
8217
8218 p = bfd_malloc (need_pad->size + 8);
8219 if (p == NULL)
8220 return FALSE;
8221
8222 if (! bfd_get_section_contents (need_pad->owner, need_pad,
8223 p, 0, need_pad->size))
8224 return FALSE;
8225
8226 need_pad->contents = p;
8227 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
8228 }
8229 else
8230 {
8231 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
8232 if (p == NULL)
8233 return FALSE;
8234
8235 need_pad->contents = p;
8236 }
8237
8238 memset (need_pad->contents + need_pad->size, 0, 8);
8239 need_pad->size += 8;
8240 }
8241
8242 return TRUE;
8243 }
8244
8245 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
8246
8247 asection *
8248 ppc64_elf_tls_setup (struct bfd_link_info *info)
8249 {
8250 struct ppc_link_hash_table *htab;
8251
8252 htab = ppc_hash_table (info);
8253 if (htab == NULL)
8254 return NULL;
8255
8256 if (abiversion (info->output_bfd) == 1)
8257 htab->opd_abi = 1;
8258
8259 if (htab->params->no_multi_toc)
8260 htab->do_multi_toc = 0;
8261 else if (!htab->do_multi_toc)
8262 htab->params->no_multi_toc = 1;
8263
8264 htab->tls_get_addr = ((struct ppc_link_hash_entry *)
8265 elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
8266 FALSE, FALSE, TRUE));
8267 /* Move dynamic linking info to the function descriptor sym. */
8268 if (htab->tls_get_addr != NULL)
8269 func_desc_adjust (&htab->tls_get_addr->elf, info);
8270 htab->tls_get_addr_fd = ((struct ppc_link_hash_entry *)
8271 elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
8272 FALSE, FALSE, TRUE));
8273 if (htab->params->tls_get_addr_opt)
8274 {
8275 struct elf_link_hash_entry *opt, *opt_fd, *tga, *tga_fd;
8276
8277 opt = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr_opt",
8278 FALSE, FALSE, TRUE);
8279 if (opt != NULL)
8280 func_desc_adjust (opt, info);
8281 opt_fd = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
8282 FALSE, FALSE, TRUE);
8283 if (opt_fd != NULL
8284 && (opt_fd->root.type == bfd_link_hash_defined
8285 || opt_fd->root.type == bfd_link_hash_defweak))
8286 {
8287 /* If glibc supports an optimized __tls_get_addr call stub,
8288 signalled by the presence of __tls_get_addr_opt, and we'll
8289 be calling __tls_get_addr via a plt call stub, then
8290 make __tls_get_addr point to __tls_get_addr_opt. */
8291 tga_fd = &htab->tls_get_addr_fd->elf;
8292 if (htab->elf.dynamic_sections_created
8293 && tga_fd != NULL
8294 && (tga_fd->type == STT_FUNC
8295 || tga_fd->needs_plt)
8296 && !(SYMBOL_CALLS_LOCAL (info, tga_fd)
8297 || (ELF_ST_VISIBILITY (tga_fd->other) != STV_DEFAULT
8298 && tga_fd->root.type == bfd_link_hash_undefweak)))
8299 {
8300 struct plt_entry *ent;
8301
8302 for (ent = tga_fd->plt.plist; ent != NULL; ent = ent->next)
8303 if (ent->plt.refcount > 0)
8304 break;
8305 if (ent != NULL)
8306 {
8307 tga_fd->root.type = bfd_link_hash_indirect;
8308 tga_fd->root.u.i.link = &opt_fd->root;
8309 ppc64_elf_copy_indirect_symbol (info, opt_fd, tga_fd);
8310 opt_fd->forced_local = 0;
8311 if (opt_fd->dynindx != -1)
8312 {
8313 /* Use __tls_get_addr_opt in dynamic relocations. */
8314 opt_fd->dynindx = -1;
8315 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
8316 opt_fd->dynstr_index);
8317 if (!bfd_elf_link_record_dynamic_symbol (info, opt_fd))
8318 return NULL;
8319 }
8320 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) opt_fd;
8321 tga = &htab->tls_get_addr->elf;
8322 if (opt != NULL && tga != NULL)
8323 {
8324 tga->root.type = bfd_link_hash_indirect;
8325 tga->root.u.i.link = &opt->root;
8326 ppc64_elf_copy_indirect_symbol (info, opt, tga);
8327 opt->forced_local = 0;
8328 _bfd_elf_link_hash_hide_symbol (info, opt,
8329 tga->forced_local);
8330 htab->tls_get_addr = (struct ppc_link_hash_entry *) opt;
8331 }
8332 htab->tls_get_addr_fd->oh = htab->tls_get_addr;
8333 htab->tls_get_addr_fd->is_func_descriptor = 1;
8334 if (htab->tls_get_addr != NULL)
8335 {
8336 htab->tls_get_addr->oh = htab->tls_get_addr_fd;
8337 htab->tls_get_addr->is_func = 1;
8338 }
8339 }
8340 }
8341 }
8342 else if (htab->params->tls_get_addr_opt < 0)
8343 htab->params->tls_get_addr_opt = 0;
8344 }
8345 return _bfd_elf_tls_setup (info->output_bfd, info);
8346 }
8347
8348 /* Return TRUE iff REL is a branch reloc with a global symbol matching
8349 HASH1 or HASH2. */
8350
8351 static bfd_boolean
8352 branch_reloc_hash_match (const bfd *ibfd,
8353 const Elf_Internal_Rela *rel,
8354 const struct ppc_link_hash_entry *hash1,
8355 const struct ppc_link_hash_entry *hash2)
8356 {
8357 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
8358 enum elf_ppc64_reloc_type r_type = ELF64_R_TYPE (rel->r_info);
8359 unsigned int r_symndx = ELF64_R_SYM (rel->r_info);
8360
8361 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
8362 {
8363 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
8364 struct elf_link_hash_entry *h;
8365
8366 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
8367 h = elf_follow_link (h);
8368 if (h == &hash1->elf || h == &hash2->elf)
8369 return TRUE;
8370 }
8371 return FALSE;
8372 }
8373
8374 /* Run through all the TLS relocs looking for optimization
8375 opportunities. The linker has been hacked (see ppc64elf.em) to do
8376 a preliminary section layout so that we know the TLS segment
8377 offsets. We can't optimize earlier because some optimizations need
8378 to know the tp offset, and we need to optimize before allocating
8379 dynamic relocations. */
8380
8381 bfd_boolean
8382 ppc64_elf_tls_optimize (struct bfd_link_info *info)
8383 {
8384 bfd *ibfd;
8385 asection *sec;
8386 struct ppc_link_hash_table *htab;
8387 unsigned char *toc_ref;
8388 int pass;
8389
8390 if (!bfd_link_executable (info))
8391 return TRUE;
8392
8393 htab = ppc_hash_table (info);
8394 if (htab == NULL)
8395 return FALSE;
8396
8397 /* Make two passes over the relocs. On the first pass, mark toc
8398 entries involved with tls relocs, and check that tls relocs
8399 involved in setting up a tls_get_addr call are indeed followed by
8400 such a call. If they are not, we can't do any tls optimization.
8401 On the second pass twiddle tls_mask flags to notify
8402 relocate_section that optimization can be done, and adjust got
8403 and plt refcounts. */
8404 toc_ref = NULL;
8405 for (pass = 0; pass < 2; ++pass)
8406 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
8407 {
8408 Elf_Internal_Sym *locsyms = NULL;
8409 asection *toc = bfd_get_section_by_name (ibfd, ".toc");
8410
8411 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8412 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
8413 {
8414 Elf_Internal_Rela *relstart, *rel, *relend;
8415 bfd_boolean found_tls_get_addr_arg = 0;
8416
8417 /* Read the relocations. */
8418 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8419 info->keep_memory);
8420 if (relstart == NULL)
8421 {
8422 free (toc_ref);
8423 return FALSE;
8424 }
8425
8426 relend = relstart + sec->reloc_count;
8427 for (rel = relstart; rel < relend; rel++)
8428 {
8429 enum elf_ppc64_reloc_type r_type;
8430 unsigned long r_symndx;
8431 struct elf_link_hash_entry *h;
8432 Elf_Internal_Sym *sym;
8433 asection *sym_sec;
8434 unsigned char *tls_mask;
8435 unsigned char tls_set, tls_clear, tls_type = 0;
8436 bfd_vma value;
8437 bfd_boolean ok_tprel, is_local;
8438 long toc_ref_index = 0;
8439 int expecting_tls_get_addr = 0;
8440 bfd_boolean ret = FALSE;
8441
8442 r_symndx = ELF64_R_SYM (rel->r_info);
8443 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
8444 r_symndx, ibfd))
8445 {
8446 err_free_rel:
8447 if (elf_section_data (sec)->relocs != relstart)
8448 free (relstart);
8449 if (toc_ref != NULL)
8450 free (toc_ref);
8451 if (locsyms != NULL
8452 && (elf_symtab_hdr (ibfd).contents
8453 != (unsigned char *) locsyms))
8454 free (locsyms);
8455 return ret;
8456 }
8457
8458 if (h != NULL)
8459 {
8460 if (h->root.type == bfd_link_hash_defined
8461 || h->root.type == bfd_link_hash_defweak)
8462 value = h->root.u.def.value;
8463 else if (h->root.type == bfd_link_hash_undefweak)
8464 value = 0;
8465 else
8466 {
8467 found_tls_get_addr_arg = 0;
8468 continue;
8469 }
8470 }
8471 else
8472 /* Symbols referenced by TLS relocs must be of type
8473 STT_TLS. So no need for .opd local sym adjust. */
8474 value = sym->st_value;
8475
8476 ok_tprel = FALSE;
8477 is_local = FALSE;
8478 if (h == NULL
8479 || !h->def_dynamic)
8480 {
8481 is_local = TRUE;
8482 if (h != NULL
8483 && h->root.type == bfd_link_hash_undefweak)
8484 ok_tprel = TRUE;
8485 else if (sym_sec != NULL
8486 && sym_sec->output_section != NULL)
8487 {
8488 value += sym_sec->output_offset;
8489 value += sym_sec->output_section->vma;
8490 value -= htab->elf.tls_sec->vma;
8491 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
8492 < (bfd_vma) 1 << 32);
8493 }
8494 }
8495
8496 r_type = ELF64_R_TYPE (rel->r_info);
8497 /* If this section has old-style __tls_get_addr calls
8498 without marker relocs, then check that each
8499 __tls_get_addr call reloc is preceded by a reloc
8500 that conceivably belongs to the __tls_get_addr arg
8501 setup insn. If we don't find matching arg setup
8502 relocs, don't do any tls optimization. */
8503 if (pass == 0
8504 && sec->has_tls_get_addr_call
8505 && h != NULL
8506 && (h == &htab->tls_get_addr->elf
8507 || h == &htab->tls_get_addr_fd->elf)
8508 && !found_tls_get_addr_arg
8509 && is_branch_reloc (r_type))
8510 {
8511 info->callbacks->minfo (_("%H __tls_get_addr lost arg, "
8512 "TLS optimization disabled\n"),
8513 ibfd, sec, rel->r_offset);
8514 ret = TRUE;
8515 goto err_free_rel;
8516 }
8517
8518 found_tls_get_addr_arg = 0;
8519 switch (r_type)
8520 {
8521 case R_PPC64_GOT_TLSLD16:
8522 case R_PPC64_GOT_TLSLD16_LO:
8523 expecting_tls_get_addr = 1;
8524 found_tls_get_addr_arg = 1;
8525 /* Fall thru */
8526
8527 case R_PPC64_GOT_TLSLD16_HI:
8528 case R_PPC64_GOT_TLSLD16_HA:
8529 /* These relocs should never be against a symbol
8530 defined in a shared lib. Leave them alone if
8531 that turns out to be the case. */
8532 if (!is_local)
8533 continue;
8534
8535 /* LD -> LE */
8536 tls_set = 0;
8537 tls_clear = TLS_LD;
8538 tls_type = TLS_TLS | TLS_LD;
8539 break;
8540
8541 case R_PPC64_GOT_TLSGD16:
8542 case R_PPC64_GOT_TLSGD16_LO:
8543 expecting_tls_get_addr = 1;
8544 found_tls_get_addr_arg = 1;
8545 /* Fall thru */
8546
8547 case R_PPC64_GOT_TLSGD16_HI:
8548 case R_PPC64_GOT_TLSGD16_HA:
8549 if (ok_tprel)
8550 /* GD -> LE */
8551 tls_set = 0;
8552 else
8553 /* GD -> IE */
8554 tls_set = TLS_TLS | TLS_TPRELGD;
8555 tls_clear = TLS_GD;
8556 tls_type = TLS_TLS | TLS_GD;
8557 break;
8558
8559 case R_PPC64_GOT_TPREL16_DS:
8560 case R_PPC64_GOT_TPREL16_LO_DS:
8561 case R_PPC64_GOT_TPREL16_HI:
8562 case R_PPC64_GOT_TPREL16_HA:
8563 if (ok_tprel)
8564 {
8565 /* IE -> LE */
8566 tls_set = 0;
8567 tls_clear = TLS_TPREL;
8568 tls_type = TLS_TLS | TLS_TPREL;
8569 break;
8570 }
8571 continue;
8572
8573 case R_PPC64_TLSGD:
8574 case R_PPC64_TLSLD:
8575 found_tls_get_addr_arg = 1;
8576 /* Fall thru */
8577
8578 case R_PPC64_TLS:
8579 case R_PPC64_TOC16:
8580 case R_PPC64_TOC16_LO:
8581 if (sym_sec == NULL || sym_sec != toc)
8582 continue;
8583
8584 /* Mark this toc entry as referenced by a TLS
8585 code sequence. We can do that now in the
8586 case of R_PPC64_TLS, and after checking for
8587 tls_get_addr for the TOC16 relocs. */
8588 if (toc_ref == NULL)
8589 toc_ref = bfd_zmalloc (toc->output_section->rawsize / 8);
8590 if (toc_ref == NULL)
8591 goto err_free_rel;
8592
8593 if (h != NULL)
8594 value = h->root.u.def.value;
8595 else
8596 value = sym->st_value;
8597 value += rel->r_addend;
8598 if (value % 8 != 0)
8599 continue;
8600 BFD_ASSERT (value < toc->size
8601 && toc->output_offset % 8 == 0);
8602 toc_ref_index = (value + toc->output_offset) / 8;
8603 if (r_type == R_PPC64_TLS
8604 || r_type == R_PPC64_TLSGD
8605 || r_type == R_PPC64_TLSLD)
8606 {
8607 toc_ref[toc_ref_index] = 1;
8608 continue;
8609 }
8610
8611 if (pass != 0 && toc_ref[toc_ref_index] == 0)
8612 continue;
8613
8614 tls_set = 0;
8615 tls_clear = 0;
8616 expecting_tls_get_addr = 2;
8617 break;
8618
8619 case R_PPC64_TPREL64:
8620 if (pass == 0
8621 || sec != toc
8622 || toc_ref == NULL
8623 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
8624 continue;
8625 if (ok_tprel)
8626 {
8627 /* IE -> LE */
8628 tls_set = TLS_EXPLICIT;
8629 tls_clear = TLS_TPREL;
8630 break;
8631 }
8632 continue;
8633
8634 case R_PPC64_DTPMOD64:
8635 if (pass == 0
8636 || sec != toc
8637 || toc_ref == NULL
8638 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
8639 continue;
8640 if (rel + 1 < relend
8641 && (rel[1].r_info
8642 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
8643 && rel[1].r_offset == rel->r_offset + 8)
8644 {
8645 if (ok_tprel)
8646 /* GD -> LE */
8647 tls_set = TLS_EXPLICIT | TLS_GD;
8648 else
8649 /* GD -> IE */
8650 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
8651 tls_clear = TLS_GD;
8652 }
8653 else
8654 {
8655 if (!is_local)
8656 continue;
8657
8658 /* LD -> LE */
8659 tls_set = TLS_EXPLICIT;
8660 tls_clear = TLS_LD;
8661 }
8662 break;
8663
8664 default:
8665 continue;
8666 }
8667
8668 if (pass == 0)
8669 {
8670 if (!expecting_tls_get_addr
8671 || !sec->has_tls_get_addr_call)
8672 continue;
8673
8674 if (rel + 1 < relend
8675 && branch_reloc_hash_match (ibfd, rel + 1,
8676 htab->tls_get_addr,
8677 htab->tls_get_addr_fd))
8678 {
8679 if (expecting_tls_get_addr == 2)
8680 {
8681 /* Check for toc tls entries. */
8682 unsigned char *toc_tls;
8683 int retval;
8684
8685 retval = get_tls_mask (&toc_tls, NULL, NULL,
8686 &locsyms,
8687 rel, ibfd);
8688 if (retval == 0)
8689 goto err_free_rel;
8690 if (toc_tls != NULL)
8691 {
8692 if ((*toc_tls & (TLS_GD | TLS_LD)) != 0)
8693 found_tls_get_addr_arg = 1;
8694 if (retval > 1)
8695 toc_ref[toc_ref_index] = 1;
8696 }
8697 }
8698 continue;
8699 }
8700
8701 if (expecting_tls_get_addr != 1)
8702 continue;
8703
8704 /* Uh oh, we didn't find the expected call. We
8705 could just mark this symbol to exclude it
8706 from tls optimization but it's safer to skip
8707 the entire optimization. */
8708 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
8709 "TLS optimization disabled\n"),
8710 ibfd, sec, rel->r_offset);
8711 ret = TRUE;
8712 goto err_free_rel;
8713 }
8714
8715 if (expecting_tls_get_addr && htab->tls_get_addr != NULL)
8716 {
8717 struct plt_entry *ent;
8718 for (ent = htab->tls_get_addr->elf.plt.plist;
8719 ent != NULL;
8720 ent = ent->next)
8721 if (ent->addend == 0)
8722 {
8723 if (ent->plt.refcount > 0)
8724 {
8725 ent->plt.refcount -= 1;
8726 expecting_tls_get_addr = 0;
8727 }
8728 break;
8729 }
8730 }
8731
8732 if (expecting_tls_get_addr && htab->tls_get_addr_fd != NULL)
8733 {
8734 struct plt_entry *ent;
8735 for (ent = htab->tls_get_addr_fd->elf.plt.plist;
8736 ent != NULL;
8737 ent = ent->next)
8738 if (ent->addend == 0)
8739 {
8740 if (ent->plt.refcount > 0)
8741 ent->plt.refcount -= 1;
8742 break;
8743 }
8744 }
8745
8746 if (tls_clear == 0)
8747 continue;
8748
8749 if ((tls_set & TLS_EXPLICIT) == 0)
8750 {
8751 struct got_entry *ent;
8752
8753 /* Adjust got entry for this reloc. */
8754 if (h != NULL)
8755 ent = h->got.glist;
8756 else
8757 ent = elf_local_got_ents (ibfd)[r_symndx];
8758
8759 for (; ent != NULL; ent = ent->next)
8760 if (ent->addend == rel->r_addend
8761 && ent->owner == ibfd
8762 && ent->tls_type == tls_type)
8763 break;
8764 if (ent == NULL)
8765 abort ();
8766
8767 if (tls_set == 0)
8768 {
8769 /* We managed to get rid of a got entry. */
8770 if (ent->got.refcount > 0)
8771 ent->got.refcount -= 1;
8772 }
8773 }
8774 else
8775 {
8776 /* If we got rid of a DTPMOD/DTPREL reloc pair then
8777 we'll lose one or two dyn relocs. */
8778 if (!dec_dynrel_count (rel->r_info, sec, info,
8779 NULL, h, sym))
8780 return FALSE;
8781
8782 if (tls_set == (TLS_EXPLICIT | TLS_GD))
8783 {
8784 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
8785 NULL, h, sym))
8786 return FALSE;
8787 }
8788 }
8789
8790 *tls_mask |= tls_set;
8791 *tls_mask &= ~tls_clear;
8792 }
8793
8794 if (elf_section_data (sec)->relocs != relstart)
8795 free (relstart);
8796 }
8797
8798 if (locsyms != NULL
8799 && (elf_symtab_hdr (ibfd).contents != (unsigned char *) locsyms))
8800 {
8801 if (!info->keep_memory)
8802 free (locsyms);
8803 else
8804 elf_symtab_hdr (ibfd).contents = (unsigned char *) locsyms;
8805 }
8806 }
8807
8808 if (toc_ref != NULL)
8809 free (toc_ref);
8810 return TRUE;
8811 }
8812
8813 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
8814 the values of any global symbols in a toc section that has been
8815 edited. Globals in toc sections should be a rarity, so this function
8816 sets a flag if any are found in toc sections other than the one just
8817 edited, so that futher hash table traversals can be avoided. */
8818
8819 struct adjust_toc_info
8820 {
8821 asection *toc;
8822 unsigned long *skip;
8823 bfd_boolean global_toc_syms;
8824 };
8825
8826 enum toc_skip_enum { ref_from_discarded = 1, can_optimize = 2 };
8827
8828 static bfd_boolean
8829 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
8830 {
8831 struct ppc_link_hash_entry *eh;
8832 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
8833 unsigned long i;
8834
8835 if (h->root.type != bfd_link_hash_defined
8836 && h->root.type != bfd_link_hash_defweak)
8837 return TRUE;
8838
8839 eh = (struct ppc_link_hash_entry *) h;
8840 if (eh->adjust_done)
8841 return TRUE;
8842
8843 if (eh->elf.root.u.def.section == toc_inf->toc)
8844 {
8845 if (eh->elf.root.u.def.value > toc_inf->toc->rawsize)
8846 i = toc_inf->toc->rawsize >> 3;
8847 else
8848 i = eh->elf.root.u.def.value >> 3;
8849
8850 if ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0)
8851 {
8852 (*_bfd_error_handler)
8853 (_("%s defined on removed toc entry"), eh->elf.root.root.string);
8854 do
8855 ++i;
8856 while ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0);
8857 eh->elf.root.u.def.value = (bfd_vma) i << 3;
8858 }
8859
8860 eh->elf.root.u.def.value -= toc_inf->skip[i];
8861 eh->adjust_done = 1;
8862 }
8863 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
8864 toc_inf->global_toc_syms = TRUE;
8865
8866 return TRUE;
8867 }
8868
8869 /* Return TRUE iff INSN is one we expect on a _LO variety toc/got reloc. */
8870
8871 static bfd_boolean
8872 ok_lo_toc_insn (unsigned int insn)
8873 {
8874 return ((insn & (0x3f << 26)) == 14u << 26 /* addi */
8875 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
8876 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
8877 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
8878 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
8879 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
8880 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
8881 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
8882 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
8883 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
8884 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
8885 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
8886 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
8887 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
8888 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
8889 && (insn & 3) != 1)
8890 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
8891 && ((insn & 3) == 0 || (insn & 3) == 3))
8892 || (insn & (0x3f << 26)) == 12u << 26 /* addic */);
8893 }
8894
8895 /* Examine all relocs referencing .toc sections in order to remove
8896 unused .toc entries. */
8897
8898 bfd_boolean
8899 ppc64_elf_edit_toc (struct bfd_link_info *info)
8900 {
8901 bfd *ibfd;
8902 struct adjust_toc_info toc_inf;
8903 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8904
8905 htab->do_toc_opt = 1;
8906 toc_inf.global_toc_syms = TRUE;
8907 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
8908 {
8909 asection *toc, *sec;
8910 Elf_Internal_Shdr *symtab_hdr;
8911 Elf_Internal_Sym *local_syms;
8912 Elf_Internal_Rela *relstart, *rel, *toc_relocs;
8913 unsigned long *skip, *drop;
8914 unsigned char *used;
8915 unsigned char *keep, last, some_unused;
8916
8917 if (!is_ppc64_elf (ibfd))
8918 continue;
8919
8920 toc = bfd_get_section_by_name (ibfd, ".toc");
8921 if (toc == NULL
8922 || toc->size == 0
8923 || toc->sec_info_type == SEC_INFO_TYPE_JUST_SYMS
8924 || discarded_section (toc))
8925 continue;
8926
8927 toc_relocs = NULL;
8928 local_syms = NULL;
8929 symtab_hdr = &elf_symtab_hdr (ibfd);
8930
8931 /* Look at sections dropped from the final link. */
8932 skip = NULL;
8933 relstart = NULL;
8934 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8935 {
8936 if (sec->reloc_count == 0
8937 || !discarded_section (sec)
8938 || get_opd_info (sec)
8939 || (sec->flags & SEC_ALLOC) == 0
8940 || (sec->flags & SEC_DEBUGGING) != 0)
8941 continue;
8942
8943 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
8944 if (relstart == NULL)
8945 goto error_ret;
8946
8947 /* Run through the relocs to see which toc entries might be
8948 unused. */
8949 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8950 {
8951 enum elf_ppc64_reloc_type r_type;
8952 unsigned long r_symndx;
8953 asection *sym_sec;
8954 struct elf_link_hash_entry *h;
8955 Elf_Internal_Sym *sym;
8956 bfd_vma val;
8957
8958 r_type = ELF64_R_TYPE (rel->r_info);
8959 switch (r_type)
8960 {
8961 default:
8962 continue;
8963
8964 case R_PPC64_TOC16:
8965 case R_PPC64_TOC16_LO:
8966 case R_PPC64_TOC16_HI:
8967 case R_PPC64_TOC16_HA:
8968 case R_PPC64_TOC16_DS:
8969 case R_PPC64_TOC16_LO_DS:
8970 break;
8971 }
8972
8973 r_symndx = ELF64_R_SYM (rel->r_info);
8974 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8975 r_symndx, ibfd))
8976 goto error_ret;
8977
8978 if (sym_sec != toc)
8979 continue;
8980
8981 if (h != NULL)
8982 val = h->root.u.def.value;
8983 else
8984 val = sym->st_value;
8985 val += rel->r_addend;
8986
8987 if (val >= toc->size)
8988 continue;
8989
8990 /* Anything in the toc ought to be aligned to 8 bytes.
8991 If not, don't mark as unused. */
8992 if (val & 7)
8993 continue;
8994
8995 if (skip == NULL)
8996 {
8997 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
8998 if (skip == NULL)
8999 goto error_ret;
9000 }
9001
9002 skip[val >> 3] = ref_from_discarded;
9003 }
9004
9005 if (elf_section_data (sec)->relocs != relstart)
9006 free (relstart);
9007 }
9008
9009 /* For largetoc loads of address constants, we can convert
9010 . addis rx,2,addr@got@ha
9011 . ld ry,addr@got@l(rx)
9012 to
9013 . addis rx,2,addr@toc@ha
9014 . addi ry,rx,addr@toc@l
9015 when addr is within 2G of the toc pointer. This then means
9016 that the word storing "addr" in the toc is no longer needed. */
9017
9018 if (!ppc64_elf_tdata (ibfd)->has_small_toc_reloc
9019 && toc->output_section->rawsize < (bfd_vma) 1 << 31
9020 && toc->reloc_count != 0)
9021 {
9022 /* Read toc relocs. */
9023 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
9024 info->keep_memory);
9025 if (toc_relocs == NULL)
9026 goto error_ret;
9027
9028 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
9029 {
9030 enum elf_ppc64_reloc_type r_type;
9031 unsigned long r_symndx;
9032 asection *sym_sec;
9033 struct elf_link_hash_entry *h;
9034 Elf_Internal_Sym *sym;
9035 bfd_vma val, addr;
9036
9037 r_type = ELF64_R_TYPE (rel->r_info);
9038 if (r_type != R_PPC64_ADDR64)
9039 continue;
9040
9041 r_symndx = ELF64_R_SYM (rel->r_info);
9042 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9043 r_symndx, ibfd))
9044 goto error_ret;
9045
9046 if (sym_sec == NULL
9047 || sym_sec->output_section == NULL
9048 || discarded_section (sym_sec))
9049 continue;
9050
9051 if (!SYMBOL_REFERENCES_LOCAL (info, h))
9052 continue;
9053
9054 if (h != NULL)
9055 {
9056 if (h->type == STT_GNU_IFUNC)
9057 continue;
9058 val = h->root.u.def.value;
9059 }
9060 else
9061 {
9062 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
9063 continue;
9064 val = sym->st_value;
9065 }
9066 val += rel->r_addend;
9067 val += sym_sec->output_section->vma + sym_sec->output_offset;
9068
9069 /* We don't yet know the exact toc pointer value, but we
9070 know it will be somewhere in the toc section. Don't
9071 optimize if the difference from any possible toc
9072 pointer is outside [ff..f80008000, 7fff7fff]. */
9073 addr = toc->output_section->vma + TOC_BASE_OFF;
9074 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
9075 continue;
9076
9077 addr = toc->output_section->vma + toc->output_section->rawsize;
9078 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
9079 continue;
9080
9081 if (skip == NULL)
9082 {
9083 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
9084 if (skip == NULL)
9085 goto error_ret;
9086 }
9087
9088 skip[rel->r_offset >> 3]
9089 |= can_optimize | ((rel - toc_relocs) << 2);
9090 }
9091 }
9092
9093 if (skip == NULL)
9094 continue;
9095
9096 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
9097 if (used == NULL)
9098 {
9099 error_ret:
9100 if (local_syms != NULL
9101 && symtab_hdr->contents != (unsigned char *) local_syms)
9102 free (local_syms);
9103 if (sec != NULL
9104 && relstart != NULL
9105 && elf_section_data (sec)->relocs != relstart)
9106 free (relstart);
9107 if (toc_relocs != NULL
9108 && elf_section_data (toc)->relocs != toc_relocs)
9109 free (toc_relocs);
9110 if (skip != NULL)
9111 free (skip);
9112 return FALSE;
9113 }
9114
9115 /* Now check all kept sections that might reference the toc.
9116 Check the toc itself last. */
9117 for (sec = (ibfd->sections == toc && toc->next ? toc->next
9118 : ibfd->sections);
9119 sec != NULL;
9120 sec = (sec == toc ? NULL
9121 : sec->next == NULL ? toc
9122 : sec->next == toc && toc->next ? toc->next
9123 : sec->next))
9124 {
9125 int repeat;
9126
9127 if (sec->reloc_count == 0
9128 || discarded_section (sec)
9129 || get_opd_info (sec)
9130 || (sec->flags & SEC_ALLOC) == 0
9131 || (sec->flags & SEC_DEBUGGING) != 0)
9132 continue;
9133
9134 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
9135 info->keep_memory);
9136 if (relstart == NULL)
9137 {
9138 free (used);
9139 goto error_ret;
9140 }
9141
9142 /* Mark toc entries referenced as used. */
9143 do
9144 {
9145 repeat = 0;
9146 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
9147 {
9148 enum elf_ppc64_reloc_type r_type;
9149 unsigned long r_symndx;
9150 asection *sym_sec;
9151 struct elf_link_hash_entry *h;
9152 Elf_Internal_Sym *sym;
9153 bfd_vma val;
9154 enum {no_check, check_lo, check_ha} insn_check;
9155
9156 r_type = ELF64_R_TYPE (rel->r_info);
9157 switch (r_type)
9158 {
9159 default:
9160 insn_check = no_check;
9161 break;
9162
9163 case R_PPC64_GOT_TLSLD16_HA:
9164 case R_PPC64_GOT_TLSGD16_HA:
9165 case R_PPC64_GOT_TPREL16_HA:
9166 case R_PPC64_GOT_DTPREL16_HA:
9167 case R_PPC64_GOT16_HA:
9168 case R_PPC64_TOC16_HA:
9169 insn_check = check_ha;
9170 break;
9171
9172 case R_PPC64_GOT_TLSLD16_LO:
9173 case R_PPC64_GOT_TLSGD16_LO:
9174 case R_PPC64_GOT_TPREL16_LO_DS:
9175 case R_PPC64_GOT_DTPREL16_LO_DS:
9176 case R_PPC64_GOT16_LO:
9177 case R_PPC64_GOT16_LO_DS:
9178 case R_PPC64_TOC16_LO:
9179 case R_PPC64_TOC16_LO_DS:
9180 insn_check = check_lo;
9181 break;
9182 }
9183
9184 if (insn_check != no_check)
9185 {
9186 bfd_vma off = rel->r_offset & ~3;
9187 unsigned char buf[4];
9188 unsigned int insn;
9189
9190 if (!bfd_get_section_contents (ibfd, sec, buf, off, 4))
9191 {
9192 free (used);
9193 goto error_ret;
9194 }
9195 insn = bfd_get_32 (ibfd, buf);
9196 if (insn_check == check_lo
9197 ? !ok_lo_toc_insn (insn)
9198 : ((insn & ((0x3f << 26) | 0x1f << 16))
9199 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */))
9200 {
9201 char str[12];
9202
9203 ppc64_elf_tdata (ibfd)->unexpected_toc_insn = 1;
9204 sprintf (str, "%#08x", insn);
9205 info->callbacks->einfo
9206 (_("%P: %H: toc optimization is not supported for"
9207 " %s instruction.\n"),
9208 ibfd, sec, rel->r_offset & ~3, str);
9209 }
9210 }
9211
9212 switch (r_type)
9213 {
9214 case R_PPC64_TOC16:
9215 case R_PPC64_TOC16_LO:
9216 case R_PPC64_TOC16_HI:
9217 case R_PPC64_TOC16_HA:
9218 case R_PPC64_TOC16_DS:
9219 case R_PPC64_TOC16_LO_DS:
9220 /* In case we're taking addresses of toc entries. */
9221 case R_PPC64_ADDR64:
9222 break;
9223
9224 default:
9225 continue;
9226 }
9227
9228 r_symndx = ELF64_R_SYM (rel->r_info);
9229 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9230 r_symndx, ibfd))
9231 {
9232 free (used);
9233 goto error_ret;
9234 }
9235
9236 if (sym_sec != toc)
9237 continue;
9238
9239 if (h != NULL)
9240 val = h->root.u.def.value;
9241 else
9242 val = sym->st_value;
9243 val += rel->r_addend;
9244
9245 if (val >= toc->size)
9246 continue;
9247
9248 if ((skip[val >> 3] & can_optimize) != 0)
9249 {
9250 bfd_vma off;
9251 unsigned char opc;
9252
9253 switch (r_type)
9254 {
9255 case R_PPC64_TOC16_HA:
9256 break;
9257
9258 case R_PPC64_TOC16_LO_DS:
9259 off = rel->r_offset;
9260 off += (bfd_big_endian (ibfd) ? -2 : 3);
9261 if (!bfd_get_section_contents (ibfd, sec, &opc,
9262 off, 1))
9263 {
9264 free (used);
9265 goto error_ret;
9266 }
9267 if ((opc & (0x3f << 2)) == (58u << 2))
9268 break;
9269 /* Fall thru */
9270
9271 default:
9272 /* Wrong sort of reloc, or not a ld. We may
9273 as well clear ref_from_discarded too. */
9274 skip[val >> 3] = 0;
9275 }
9276 }
9277
9278 if (sec != toc)
9279 used[val >> 3] = 1;
9280 /* For the toc section, we only mark as used if this
9281 entry itself isn't unused. */
9282 else if ((used[rel->r_offset >> 3]
9283 || !(skip[rel->r_offset >> 3] & ref_from_discarded))
9284 && !used[val >> 3])
9285 {
9286 /* Do all the relocs again, to catch reference
9287 chains. */
9288 repeat = 1;
9289 used[val >> 3] = 1;
9290 }
9291 }
9292 }
9293 while (repeat);
9294
9295 if (elf_section_data (sec)->relocs != relstart)
9296 free (relstart);
9297 }
9298
9299 /* Merge the used and skip arrays. Assume that TOC
9300 doublewords not appearing as either used or unused belong
9301 to to an entry more than one doubleword in size. */
9302 for (drop = skip, keep = used, last = 0, some_unused = 0;
9303 drop < skip + (toc->size + 7) / 8;
9304 ++drop, ++keep)
9305 {
9306 if (*keep)
9307 {
9308 *drop &= ~ref_from_discarded;
9309 if ((*drop & can_optimize) != 0)
9310 some_unused = 1;
9311 last = 0;
9312 }
9313 else if ((*drop & ref_from_discarded) != 0)
9314 {
9315 some_unused = 1;
9316 last = ref_from_discarded;
9317 }
9318 else
9319 *drop = last;
9320 }
9321
9322 free (used);
9323
9324 if (some_unused)
9325 {
9326 bfd_byte *contents, *src;
9327 unsigned long off;
9328 Elf_Internal_Sym *sym;
9329 bfd_boolean local_toc_syms = FALSE;
9330
9331 /* Shuffle the toc contents, and at the same time convert the
9332 skip array from booleans into offsets. */
9333 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
9334 goto error_ret;
9335
9336 elf_section_data (toc)->this_hdr.contents = contents;
9337
9338 for (src = contents, off = 0, drop = skip;
9339 src < contents + toc->size;
9340 src += 8, ++drop)
9341 {
9342 if ((*drop & (can_optimize | ref_from_discarded)) != 0)
9343 off += 8;
9344 else if (off != 0)
9345 {
9346 *drop = off;
9347 memcpy (src - off, src, 8);
9348 }
9349 }
9350 *drop = off;
9351 toc->rawsize = toc->size;
9352 toc->size = src - contents - off;
9353
9354 /* Adjust addends for relocs against the toc section sym,
9355 and optimize any accesses we can. */
9356 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
9357 {
9358 if (sec->reloc_count == 0
9359 || discarded_section (sec))
9360 continue;
9361
9362 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
9363 info->keep_memory);
9364 if (relstart == NULL)
9365 goto error_ret;
9366
9367 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
9368 {
9369 enum elf_ppc64_reloc_type r_type;
9370 unsigned long r_symndx;
9371 asection *sym_sec;
9372 struct elf_link_hash_entry *h;
9373 bfd_vma val;
9374
9375 r_type = ELF64_R_TYPE (rel->r_info);
9376 switch (r_type)
9377 {
9378 default:
9379 continue;
9380
9381 case R_PPC64_TOC16:
9382 case R_PPC64_TOC16_LO:
9383 case R_PPC64_TOC16_HI:
9384 case R_PPC64_TOC16_HA:
9385 case R_PPC64_TOC16_DS:
9386 case R_PPC64_TOC16_LO_DS:
9387 case R_PPC64_ADDR64:
9388 break;
9389 }
9390
9391 r_symndx = ELF64_R_SYM (rel->r_info);
9392 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9393 r_symndx, ibfd))
9394 goto error_ret;
9395
9396 if (sym_sec != toc)
9397 continue;
9398
9399 if (h != NULL)
9400 val = h->root.u.def.value;
9401 else
9402 {
9403 val = sym->st_value;
9404 if (val != 0)
9405 local_toc_syms = TRUE;
9406 }
9407
9408 val += rel->r_addend;
9409
9410 if (val > toc->rawsize)
9411 val = toc->rawsize;
9412 else if ((skip[val >> 3] & ref_from_discarded) != 0)
9413 continue;
9414 else if ((skip[val >> 3] & can_optimize) != 0)
9415 {
9416 Elf_Internal_Rela *tocrel
9417 = toc_relocs + (skip[val >> 3] >> 2);
9418 unsigned long tsym = ELF64_R_SYM (tocrel->r_info);
9419
9420 switch (r_type)
9421 {
9422 case R_PPC64_TOC16_HA:
9423 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_TOC16_HA);
9424 break;
9425
9426 case R_PPC64_TOC16_LO_DS:
9427 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_LO_DS_OPT);
9428 break;
9429
9430 default:
9431 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
9432 ppc_howto_init ();
9433 info->callbacks->einfo
9434 (_("%P: %H: %s references "
9435 "optimized away TOC entry\n"),
9436 ibfd, sec, rel->r_offset,
9437 ppc64_elf_howto_table[r_type]->name);
9438 bfd_set_error (bfd_error_bad_value);
9439 goto error_ret;
9440 }
9441 rel->r_addend = tocrel->r_addend;
9442 elf_section_data (sec)->relocs = relstart;
9443 continue;
9444 }
9445
9446 if (h != NULL || sym->st_value != 0)
9447 continue;
9448
9449 rel->r_addend -= skip[val >> 3];
9450 elf_section_data (sec)->relocs = relstart;
9451 }
9452
9453 if (elf_section_data (sec)->relocs != relstart)
9454 free (relstart);
9455 }
9456
9457 /* We shouldn't have local or global symbols defined in the TOC,
9458 but handle them anyway. */
9459 if (local_syms != NULL)
9460 for (sym = local_syms;
9461 sym < local_syms + symtab_hdr->sh_info;
9462 ++sym)
9463 if (sym->st_value != 0
9464 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
9465 {
9466 unsigned long i;
9467
9468 if (sym->st_value > toc->rawsize)
9469 i = toc->rawsize >> 3;
9470 else
9471 i = sym->st_value >> 3;
9472
9473 if ((skip[i] & (ref_from_discarded | can_optimize)) != 0)
9474 {
9475 if (local_toc_syms)
9476 (*_bfd_error_handler)
9477 (_("%s defined on removed toc entry"),
9478 bfd_elf_sym_name (ibfd, symtab_hdr, sym, NULL));
9479 do
9480 ++i;
9481 while ((skip[i] & (ref_from_discarded | can_optimize)));
9482 sym->st_value = (bfd_vma) i << 3;
9483 }
9484
9485 sym->st_value -= skip[i];
9486 symtab_hdr->contents = (unsigned char *) local_syms;
9487 }
9488
9489 /* Adjust any global syms defined in this toc input section. */
9490 if (toc_inf.global_toc_syms)
9491 {
9492 toc_inf.toc = toc;
9493 toc_inf.skip = skip;
9494 toc_inf.global_toc_syms = FALSE;
9495 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
9496 &toc_inf);
9497 }
9498
9499 if (toc->reloc_count != 0)
9500 {
9501 Elf_Internal_Shdr *rel_hdr;
9502 Elf_Internal_Rela *wrel;
9503 bfd_size_type sz;
9504
9505 /* Remove unused toc relocs, and adjust those we keep. */
9506 if (toc_relocs == NULL)
9507 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
9508 info->keep_memory);
9509 if (toc_relocs == NULL)
9510 goto error_ret;
9511
9512 wrel = toc_relocs;
9513 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
9514 if ((skip[rel->r_offset >> 3]
9515 & (ref_from_discarded | can_optimize)) == 0)
9516 {
9517 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
9518 wrel->r_info = rel->r_info;
9519 wrel->r_addend = rel->r_addend;
9520 ++wrel;
9521 }
9522 else if (!dec_dynrel_count (rel->r_info, toc, info,
9523 &local_syms, NULL, NULL))
9524 goto error_ret;
9525
9526 elf_section_data (toc)->relocs = toc_relocs;
9527 toc->reloc_count = wrel - toc_relocs;
9528 rel_hdr = _bfd_elf_single_rel_hdr (toc);
9529 sz = rel_hdr->sh_entsize;
9530 rel_hdr->sh_size = toc->reloc_count * sz;
9531 }
9532 }
9533 else if (toc_relocs != NULL
9534 && elf_section_data (toc)->relocs != toc_relocs)
9535 free (toc_relocs);
9536
9537 if (local_syms != NULL
9538 && symtab_hdr->contents != (unsigned char *) local_syms)
9539 {
9540 if (!info->keep_memory)
9541 free (local_syms);
9542 else
9543 symtab_hdr->contents = (unsigned char *) local_syms;
9544 }
9545 free (skip);
9546 }
9547
9548 return TRUE;
9549 }
9550
9551 /* Return true iff input section I references the TOC using
9552 instructions limited to +/-32k offsets. */
9553
9554 bfd_boolean
9555 ppc64_elf_has_small_toc_reloc (asection *i)
9556 {
9557 return (is_ppc64_elf (i->owner)
9558 && ppc64_elf_tdata (i->owner)->has_small_toc_reloc);
9559 }
9560
9561 /* Allocate space for one GOT entry. */
9562
9563 static void
9564 allocate_got (struct elf_link_hash_entry *h,
9565 struct bfd_link_info *info,
9566 struct got_entry *gent)
9567 {
9568 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9569 bfd_boolean dyn;
9570 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
9571 int entsize = (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)
9572 ? 16 : 8);
9573 int rentsize = (gent->tls_type & eh->tls_mask & TLS_GD
9574 ? 2 : 1) * sizeof (Elf64_External_Rela);
9575 asection *got = ppc64_elf_tdata (gent->owner)->got;
9576
9577 gent->got.offset = got->size;
9578 got->size += entsize;
9579
9580 dyn = htab->elf.dynamic_sections_created;
9581 if (h->type == STT_GNU_IFUNC)
9582 {
9583 htab->elf.irelplt->size += rentsize;
9584 htab->got_reli_size += rentsize;
9585 }
9586 else if ((bfd_link_pic (info)
9587 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
9588 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
9589 || h->root.type != bfd_link_hash_undefweak))
9590 {
9591 asection *relgot = ppc64_elf_tdata (gent->owner)->relgot;
9592 relgot->size += rentsize;
9593 }
9594 }
9595
9596 /* This function merges got entries in the same toc group. */
9597
9598 static void
9599 merge_got_entries (struct got_entry **pent)
9600 {
9601 struct got_entry *ent, *ent2;
9602
9603 for (ent = *pent; ent != NULL; ent = ent->next)
9604 if (!ent->is_indirect)
9605 for (ent2 = ent->next; ent2 != NULL; ent2 = ent2->next)
9606 if (!ent2->is_indirect
9607 && ent2->addend == ent->addend
9608 && ent2->tls_type == ent->tls_type
9609 && elf_gp (ent2->owner) == elf_gp (ent->owner))
9610 {
9611 ent2->is_indirect = TRUE;
9612 ent2->got.ent = ent;
9613 }
9614 }
9615
9616 /* Allocate space in .plt, .got and associated reloc sections for
9617 dynamic relocs. */
9618
9619 static bfd_boolean
9620 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
9621 {
9622 struct bfd_link_info *info;
9623 struct ppc_link_hash_table *htab;
9624 asection *s;
9625 struct ppc_link_hash_entry *eh;
9626 struct got_entry **pgent, *gent;
9627
9628 if (h->root.type == bfd_link_hash_indirect)
9629 return TRUE;
9630
9631 info = (struct bfd_link_info *) inf;
9632 htab = ppc_hash_table (info);
9633 if (htab == NULL)
9634 return FALSE;
9635
9636 eh = (struct ppc_link_hash_entry *) h;
9637 /* Run through the TLS GD got entries first if we're changing them
9638 to TPREL. */
9639 if ((eh->tls_mask & TLS_TPRELGD) != 0)
9640 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9641 if (gent->got.refcount > 0
9642 && (gent->tls_type & TLS_GD) != 0)
9643 {
9644 /* This was a GD entry that has been converted to TPREL. If
9645 there happens to be a TPREL entry we can use that one. */
9646 struct got_entry *ent;
9647 for (ent = h->got.glist; ent != NULL; ent = ent->next)
9648 if (ent->got.refcount > 0
9649 && (ent->tls_type & TLS_TPREL) != 0
9650 && ent->addend == gent->addend
9651 && ent->owner == gent->owner)
9652 {
9653 gent->got.refcount = 0;
9654 break;
9655 }
9656
9657 /* If not, then we'll be using our own TPREL entry. */
9658 if (gent->got.refcount != 0)
9659 gent->tls_type = TLS_TLS | TLS_TPREL;
9660 }
9661
9662 /* Remove any list entry that won't generate a word in the GOT before
9663 we call merge_got_entries. Otherwise we risk merging to empty
9664 entries. */
9665 pgent = &h->got.glist;
9666 while ((gent = *pgent) != NULL)
9667 if (gent->got.refcount > 0)
9668 {
9669 if ((gent->tls_type & TLS_LD) != 0
9670 && !h->def_dynamic)
9671 {
9672 ppc64_tlsld_got (gent->owner)->got.refcount += 1;
9673 *pgent = gent->next;
9674 }
9675 else
9676 pgent = &gent->next;
9677 }
9678 else
9679 *pgent = gent->next;
9680
9681 if (!htab->do_multi_toc)
9682 merge_got_entries (&h->got.glist);
9683
9684 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9685 if (!gent->is_indirect)
9686 {
9687 /* Make sure this symbol is output as a dynamic symbol.
9688 Undefined weak syms won't yet be marked as dynamic,
9689 nor will all TLS symbols. */
9690 if (h->dynindx == -1
9691 && !h->forced_local
9692 && h->type != STT_GNU_IFUNC
9693 && htab->elf.dynamic_sections_created)
9694 {
9695 if (! bfd_elf_link_record_dynamic_symbol (info, h))
9696 return FALSE;
9697 }
9698
9699 if (!is_ppc64_elf (gent->owner))
9700 abort ();
9701
9702 allocate_got (h, info, gent);
9703 }
9704
9705 if (!htab->elf.dynamic_sections_created
9706 && h->type != STT_GNU_IFUNC)
9707 eh->dyn_relocs = NULL;
9708
9709 if (eh->dyn_relocs != NULL)
9710 {
9711 struct elf_dyn_relocs *p, **pp;
9712
9713 /* In the shared -Bsymbolic case, discard space allocated for
9714 dynamic pc-relative relocs against symbols which turn out to
9715 be defined in regular objects. For the normal shared case,
9716 discard space for relocs that have become local due to symbol
9717 visibility changes. */
9718
9719 if (bfd_link_pic (info))
9720 {
9721 /* Relocs that use pc_count are those that appear on a call
9722 insn, or certain REL relocs (see must_be_dyn_reloc) that
9723 can be generated via assembly. We want calls to
9724 protected symbols to resolve directly to the function
9725 rather than going via the plt. If people want function
9726 pointer comparisons to work as expected then they should
9727 avoid writing weird assembly. */
9728 if (SYMBOL_CALLS_LOCAL (info, h))
9729 {
9730 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
9731 {
9732 p->count -= p->pc_count;
9733 p->pc_count = 0;
9734 if (p->count == 0)
9735 *pp = p->next;
9736 else
9737 pp = &p->next;
9738 }
9739 }
9740
9741 /* Also discard relocs on undefined weak syms with
9742 non-default visibility. */
9743 if (eh->dyn_relocs != NULL
9744 && h->root.type == bfd_link_hash_undefweak)
9745 {
9746 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
9747 eh->dyn_relocs = NULL;
9748
9749 /* Make sure this symbol is output as a dynamic symbol.
9750 Undefined weak syms won't yet be marked as dynamic. */
9751 else if (h->dynindx == -1
9752 && !h->forced_local)
9753 {
9754 if (! bfd_elf_link_record_dynamic_symbol (info, h))
9755 return FALSE;
9756 }
9757 }
9758 }
9759 else if (h->type == STT_GNU_IFUNC)
9760 {
9761 /* A plt entry is always created when making direct calls to
9762 an ifunc, even when building a static executable, but
9763 that doesn't cover all cases. We may have only an ifunc
9764 initialised function pointer for a given ifunc symbol.
9765
9766 For ELFv2, dynamic relocations are not required when
9767 generating a global entry PLT stub. */
9768 if (abiversion (info->output_bfd) >= 2)
9769 {
9770 if (global_entry_stub (h))
9771 eh->dyn_relocs = NULL;
9772 }
9773
9774 /* For ELFv1 we have function descriptors. Descriptors need
9775 to be treated like PLT entries and thus have dynamic
9776 relocations. One exception is when the function
9777 descriptor is copied into .dynbss (which should only
9778 happen with ancient versions of gcc). */
9779 else if (h->needs_copy)
9780 eh->dyn_relocs = NULL;
9781 }
9782 else if (ELIMINATE_COPY_RELOCS)
9783 {
9784 /* For the non-pic case, discard space for relocs against
9785 symbols which turn out to need copy relocs or are not
9786 dynamic. */
9787
9788 /* First make sure this symbol is output as a dynamic symbol.
9789 Undefined weak syms won't yet be marked as dynamic. */
9790 if (h->root.type == bfd_link_hash_undefweak
9791 && !h->non_got_ref
9792 && !h->def_regular
9793 && h->dynindx == -1
9794 && !h->forced_local
9795 && !bfd_elf_link_record_dynamic_symbol (info, h))
9796 return FALSE;
9797
9798 if (h->non_got_ref
9799 || h->def_regular
9800 || h->dynindx == -1)
9801 eh->dyn_relocs = NULL;
9802 }
9803
9804 /* Finally, allocate space. */
9805 for (p = eh->dyn_relocs; p != NULL; p = p->next)
9806 {
9807 asection *sreloc = elf_section_data (p->sec)->sreloc;
9808 if (eh->elf.type == STT_GNU_IFUNC)
9809 sreloc = htab->elf.irelplt;
9810 sreloc->size += p->count * sizeof (Elf64_External_Rela);
9811 }
9812 }
9813
9814 if ((htab->elf.dynamic_sections_created
9815 && h->dynindx != -1
9816 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, bfd_link_pic (info), h))
9817 || h->type == STT_GNU_IFUNC)
9818 {
9819 struct plt_entry *pent;
9820 bfd_boolean doneone = FALSE;
9821 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
9822 if (pent->plt.refcount > 0)
9823 {
9824 if (!htab->elf.dynamic_sections_created
9825 || h->dynindx == -1)
9826 {
9827 s = htab->elf.iplt;
9828 pent->plt.offset = s->size;
9829 s->size += PLT_ENTRY_SIZE (htab);
9830 s = htab->elf.irelplt;
9831 }
9832 else
9833 {
9834 /* If this is the first .plt entry, make room for the special
9835 first entry. */
9836 s = htab->elf.splt;
9837 if (s->size == 0)
9838 s->size += PLT_INITIAL_ENTRY_SIZE (htab);
9839
9840 pent->plt.offset = s->size;
9841
9842 /* Make room for this entry. */
9843 s->size += PLT_ENTRY_SIZE (htab);
9844
9845 /* Make room for the .glink code. */
9846 s = htab->glink;
9847 if (s->size == 0)
9848 s->size += GLINK_CALL_STUB_SIZE;
9849 if (htab->opd_abi)
9850 {
9851 /* We need bigger stubs past index 32767. */
9852 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
9853 s->size += 4;
9854 s->size += 2*4;
9855 }
9856 else
9857 s->size += 4;
9858
9859 /* We also need to make an entry in the .rela.plt section. */
9860 s = htab->elf.srelplt;
9861 }
9862 s->size += sizeof (Elf64_External_Rela);
9863 doneone = TRUE;
9864 }
9865 else
9866 pent->plt.offset = (bfd_vma) -1;
9867 if (!doneone)
9868 {
9869 h->plt.plist = NULL;
9870 h->needs_plt = 0;
9871 }
9872 }
9873 else
9874 {
9875 h->plt.plist = NULL;
9876 h->needs_plt = 0;
9877 }
9878
9879 return TRUE;
9880 }
9881
9882 /* Called via elf_link_hash_traverse from ppc64_elf_size_dynamic_sections
9883 to set up space for global entry stubs. These are put in glink,
9884 after the branch table. */
9885
9886 static bfd_boolean
9887 size_global_entry_stubs (struct elf_link_hash_entry *h, void *inf)
9888 {
9889 struct bfd_link_info *info;
9890 struct ppc_link_hash_table *htab;
9891 struct plt_entry *pent;
9892 asection *s;
9893
9894 if (h->root.type == bfd_link_hash_indirect)
9895 return TRUE;
9896
9897 if (!h->pointer_equality_needed)
9898 return TRUE;
9899
9900 if (h->def_regular)
9901 return TRUE;
9902
9903 info = inf;
9904 htab = ppc_hash_table (info);
9905 if (htab == NULL)
9906 return FALSE;
9907
9908 s = htab->glink;
9909 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
9910 if (pent->plt.offset != (bfd_vma) -1
9911 && pent->addend == 0)
9912 {
9913 /* For ELFv2, if this symbol is not defined in a regular file
9914 and we are not generating a shared library or pie, then we
9915 need to define the symbol in the executable on a call stub.
9916 This is to avoid text relocations. */
9917 s->size = (s->size + 15) & -16;
9918 h->root.type = bfd_link_hash_defined;
9919 h->root.u.def.section = s;
9920 h->root.u.def.value = s->size;
9921 s->size += 16;
9922 break;
9923 }
9924 return TRUE;
9925 }
9926
9927 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
9928 read-only sections. */
9929
9930 static bfd_boolean
9931 maybe_set_textrel (struct elf_link_hash_entry *h, void *info)
9932 {
9933 if (h->root.type == bfd_link_hash_indirect)
9934 return TRUE;
9935
9936 if (readonly_dynrelocs (h))
9937 {
9938 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
9939
9940 /* Not an error, just cut short the traversal. */
9941 return FALSE;
9942 }
9943 return TRUE;
9944 }
9945
9946 /* Set the sizes of the dynamic sections. */
9947
9948 static bfd_boolean
9949 ppc64_elf_size_dynamic_sections (bfd *output_bfd,
9950 struct bfd_link_info *info)
9951 {
9952 struct ppc_link_hash_table *htab;
9953 bfd *dynobj;
9954 asection *s;
9955 bfd_boolean relocs;
9956 bfd *ibfd;
9957 struct got_entry *first_tlsld;
9958
9959 htab = ppc_hash_table (info);
9960 if (htab == NULL)
9961 return FALSE;
9962
9963 dynobj = htab->elf.dynobj;
9964 if (dynobj == NULL)
9965 abort ();
9966
9967 if (htab->elf.dynamic_sections_created)
9968 {
9969 /* Set the contents of the .interp section to the interpreter. */
9970 if (bfd_link_executable (info) && !info->nointerp)
9971 {
9972 s = bfd_get_linker_section (dynobj, ".interp");
9973 if (s == NULL)
9974 abort ();
9975 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
9976 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
9977 }
9978 }
9979
9980 /* Set up .got offsets for local syms, and space for local dynamic
9981 relocs. */
9982 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
9983 {
9984 struct got_entry **lgot_ents;
9985 struct got_entry **end_lgot_ents;
9986 struct plt_entry **local_plt;
9987 struct plt_entry **end_local_plt;
9988 unsigned char *lgot_masks;
9989 bfd_size_type locsymcount;
9990 Elf_Internal_Shdr *symtab_hdr;
9991
9992 if (!is_ppc64_elf (ibfd))
9993 continue;
9994
9995 for (s = ibfd->sections; s != NULL; s = s->next)
9996 {
9997 struct ppc_dyn_relocs *p;
9998
9999 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
10000 {
10001 if (!bfd_is_abs_section (p->sec)
10002 && bfd_is_abs_section (p->sec->output_section))
10003 {
10004 /* Input section has been discarded, either because
10005 it is a copy of a linkonce section or due to
10006 linker script /DISCARD/, so we'll be discarding
10007 the relocs too. */
10008 }
10009 else if (p->count != 0)
10010 {
10011 asection *srel = elf_section_data (p->sec)->sreloc;
10012 if (p->ifunc)
10013 srel = htab->elf.irelplt;
10014 srel->size += p->count * sizeof (Elf64_External_Rela);
10015 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
10016 info->flags |= DF_TEXTREL;
10017 }
10018 }
10019 }
10020
10021 lgot_ents = elf_local_got_ents (ibfd);
10022 if (!lgot_ents)
10023 continue;
10024
10025 symtab_hdr = &elf_symtab_hdr (ibfd);
10026 locsymcount = symtab_hdr->sh_info;
10027 end_lgot_ents = lgot_ents + locsymcount;
10028 local_plt = (struct plt_entry **) end_lgot_ents;
10029 end_local_plt = local_plt + locsymcount;
10030 lgot_masks = (unsigned char *) end_local_plt;
10031 s = ppc64_elf_tdata (ibfd)->got;
10032 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
10033 {
10034 struct got_entry **pent, *ent;
10035
10036 pent = lgot_ents;
10037 while ((ent = *pent) != NULL)
10038 if (ent->got.refcount > 0)
10039 {
10040 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
10041 {
10042 ppc64_tlsld_got (ibfd)->got.refcount += 1;
10043 *pent = ent->next;
10044 }
10045 else
10046 {
10047 unsigned int ent_size = 8;
10048 unsigned int rel_size = sizeof (Elf64_External_Rela);
10049
10050 ent->got.offset = s->size;
10051 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
10052 {
10053 ent_size *= 2;
10054 rel_size *= 2;
10055 }
10056 s->size += ent_size;
10057 if ((*lgot_masks & PLT_IFUNC) != 0)
10058 {
10059 htab->elf.irelplt->size += rel_size;
10060 htab->got_reli_size += rel_size;
10061 }
10062 else if (bfd_link_pic (info))
10063 {
10064 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
10065 srel->size += rel_size;
10066 }
10067 pent = &ent->next;
10068 }
10069 }
10070 else
10071 *pent = ent->next;
10072 }
10073
10074 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
10075 for (; local_plt < end_local_plt; ++local_plt)
10076 {
10077 struct plt_entry *ent;
10078
10079 for (ent = *local_plt; ent != NULL; ent = ent->next)
10080 if (ent->plt.refcount > 0)
10081 {
10082 s = htab->elf.iplt;
10083 ent->plt.offset = s->size;
10084 s->size += PLT_ENTRY_SIZE (htab);
10085
10086 htab->elf.irelplt->size += sizeof (Elf64_External_Rela);
10087 }
10088 else
10089 ent->plt.offset = (bfd_vma) -1;
10090 }
10091 }
10092
10093 /* Allocate global sym .plt and .got entries, and space for global
10094 sym dynamic relocs. */
10095 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
10096 /* Stash the end of glink branch table. */
10097 if (htab->glink != NULL)
10098 htab->glink->rawsize = htab->glink->size;
10099
10100 if (!htab->opd_abi && !bfd_link_pic (info))
10101 elf_link_hash_traverse (&htab->elf, size_global_entry_stubs, info);
10102
10103 first_tlsld = NULL;
10104 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
10105 {
10106 struct got_entry *ent;
10107
10108 if (!is_ppc64_elf (ibfd))
10109 continue;
10110
10111 ent = ppc64_tlsld_got (ibfd);
10112 if (ent->got.refcount > 0)
10113 {
10114 if (!htab->do_multi_toc && first_tlsld != NULL)
10115 {
10116 ent->is_indirect = TRUE;
10117 ent->got.ent = first_tlsld;
10118 }
10119 else
10120 {
10121 if (first_tlsld == NULL)
10122 first_tlsld = ent;
10123 s = ppc64_elf_tdata (ibfd)->got;
10124 ent->got.offset = s->size;
10125 ent->owner = ibfd;
10126 s->size += 16;
10127 if (bfd_link_pic (info))
10128 {
10129 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
10130 srel->size += sizeof (Elf64_External_Rela);
10131 }
10132 }
10133 }
10134 else
10135 ent->got.offset = (bfd_vma) -1;
10136 }
10137
10138 /* We now have determined the sizes of the various dynamic sections.
10139 Allocate memory for them. */
10140 relocs = FALSE;
10141 for (s = dynobj->sections; s != NULL; s = s->next)
10142 {
10143 if ((s->flags & SEC_LINKER_CREATED) == 0)
10144 continue;
10145
10146 if (s == htab->brlt || s == htab->relbrlt)
10147 /* These haven't been allocated yet; don't strip. */
10148 continue;
10149 else if (s == htab->elf.sgot
10150 || s == htab->elf.splt
10151 || s == htab->elf.iplt
10152 || s == htab->glink
10153 || s == htab->dynbss)
10154 {
10155 /* Strip this section if we don't need it; see the
10156 comment below. */
10157 }
10158 else if (s == htab->glink_eh_frame)
10159 {
10160 if (!bfd_is_abs_section (s->output_section))
10161 /* Not sized yet. */
10162 continue;
10163 }
10164 else if (CONST_STRNEQ (s->name, ".rela"))
10165 {
10166 if (s->size != 0)
10167 {
10168 if (s != htab->elf.srelplt)
10169 relocs = TRUE;
10170
10171 /* We use the reloc_count field as a counter if we need
10172 to copy relocs into the output file. */
10173 s->reloc_count = 0;
10174 }
10175 }
10176 else
10177 {
10178 /* It's not one of our sections, so don't allocate space. */
10179 continue;
10180 }
10181
10182 if (s->size == 0)
10183 {
10184 /* If we don't need this section, strip it from the
10185 output file. This is mostly to handle .rela.bss and
10186 .rela.plt. We must create both sections in
10187 create_dynamic_sections, because they must be created
10188 before the linker maps input sections to output
10189 sections. The linker does that before
10190 adjust_dynamic_symbol is called, and it is that
10191 function which decides whether anything needs to go
10192 into these sections. */
10193 s->flags |= SEC_EXCLUDE;
10194 continue;
10195 }
10196
10197 if ((s->flags & SEC_HAS_CONTENTS) == 0)
10198 continue;
10199
10200 /* Allocate memory for the section contents. We use bfd_zalloc
10201 here in case unused entries are not reclaimed before the
10202 section's contents are written out. This should not happen,
10203 but this way if it does we get a R_PPC64_NONE reloc in .rela
10204 sections instead of garbage.
10205 We also rely on the section contents being zero when writing
10206 the GOT. */
10207 s->contents = bfd_zalloc (dynobj, s->size);
10208 if (s->contents == NULL)
10209 return FALSE;
10210 }
10211
10212 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
10213 {
10214 if (!is_ppc64_elf (ibfd))
10215 continue;
10216
10217 s = ppc64_elf_tdata (ibfd)->got;
10218 if (s != NULL && s != htab->elf.sgot)
10219 {
10220 if (s->size == 0)
10221 s->flags |= SEC_EXCLUDE;
10222 else
10223 {
10224 s->contents = bfd_zalloc (ibfd, s->size);
10225 if (s->contents == NULL)
10226 return FALSE;
10227 }
10228 }
10229 s = ppc64_elf_tdata (ibfd)->relgot;
10230 if (s != NULL)
10231 {
10232 if (s->size == 0)
10233 s->flags |= SEC_EXCLUDE;
10234 else
10235 {
10236 s->contents = bfd_zalloc (ibfd, s->size);
10237 if (s->contents == NULL)
10238 return FALSE;
10239 relocs = TRUE;
10240 s->reloc_count = 0;
10241 }
10242 }
10243 }
10244
10245 if (htab->elf.dynamic_sections_created)
10246 {
10247 bfd_boolean tls_opt;
10248
10249 /* Add some entries to the .dynamic section. We fill in the
10250 values later, in ppc64_elf_finish_dynamic_sections, but we
10251 must add the entries now so that we get the correct size for
10252 the .dynamic section. The DT_DEBUG entry is filled in by the
10253 dynamic linker and used by the debugger. */
10254 #define add_dynamic_entry(TAG, VAL) \
10255 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
10256
10257 if (bfd_link_executable (info))
10258 {
10259 if (!add_dynamic_entry (DT_DEBUG, 0))
10260 return FALSE;
10261 }
10262
10263 if (htab->elf.splt != NULL && htab->elf.splt->size != 0)
10264 {
10265 if (!add_dynamic_entry (DT_PLTGOT, 0)
10266 || !add_dynamic_entry (DT_PLTRELSZ, 0)
10267 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
10268 || !add_dynamic_entry (DT_JMPREL, 0)
10269 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
10270 return FALSE;
10271 }
10272
10273 if (NO_OPD_RELOCS && abiversion (output_bfd) <= 1)
10274 {
10275 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
10276 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
10277 return FALSE;
10278 }
10279
10280 tls_opt = (htab->params->tls_get_addr_opt
10281 && htab->tls_get_addr_fd != NULL
10282 && htab->tls_get_addr_fd->elf.plt.plist != NULL);
10283 if (tls_opt || !htab->opd_abi)
10284 {
10285 if (!add_dynamic_entry (DT_PPC64_OPT, tls_opt ? PPC64_OPT_TLS : 0))
10286 return FALSE;
10287 }
10288
10289 if (relocs)
10290 {
10291 if (!add_dynamic_entry (DT_RELA, 0)
10292 || !add_dynamic_entry (DT_RELASZ, 0)
10293 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
10294 return FALSE;
10295
10296 /* If any dynamic relocs apply to a read-only section,
10297 then we need a DT_TEXTREL entry. */
10298 if ((info->flags & DF_TEXTREL) == 0)
10299 elf_link_hash_traverse (&htab->elf, maybe_set_textrel, info);
10300
10301 if ((info->flags & DF_TEXTREL) != 0)
10302 {
10303 if (!add_dynamic_entry (DT_TEXTREL, 0))
10304 return FALSE;
10305 }
10306 }
10307 }
10308 #undef add_dynamic_entry
10309
10310 return TRUE;
10311 }
10312
10313 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
10314
10315 static bfd_boolean
10316 ppc64_elf_hash_symbol (struct elf_link_hash_entry *h)
10317 {
10318 if (h->plt.plist != NULL
10319 && !h->def_regular
10320 && !h->pointer_equality_needed)
10321 return FALSE;
10322
10323 return _bfd_elf_hash_symbol (h);
10324 }
10325
10326 /* Determine the type of stub needed, if any, for a call. */
10327
10328 static inline enum ppc_stub_type
10329 ppc_type_of_stub (asection *input_sec,
10330 const Elf_Internal_Rela *rel,
10331 struct ppc_link_hash_entry **hash,
10332 struct plt_entry **plt_ent,
10333 bfd_vma destination,
10334 unsigned long local_off)
10335 {
10336 struct ppc_link_hash_entry *h = *hash;
10337 bfd_vma location;
10338 bfd_vma branch_offset;
10339 bfd_vma max_branch_offset;
10340 enum elf_ppc64_reloc_type r_type;
10341
10342 if (h != NULL)
10343 {
10344 struct plt_entry *ent;
10345 struct ppc_link_hash_entry *fdh = h;
10346 if (h->oh != NULL
10347 && h->oh->is_func_descriptor)
10348 {
10349 fdh = ppc_follow_link (h->oh);
10350 *hash = fdh;
10351 }
10352
10353 for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next)
10354 if (ent->addend == rel->r_addend
10355 && ent->plt.offset != (bfd_vma) -1)
10356 {
10357 *plt_ent = ent;
10358 return ppc_stub_plt_call;
10359 }
10360
10361 /* Here, we know we don't have a plt entry. If we don't have a
10362 either a defined function descriptor or a defined entry symbol
10363 in a regular object file, then it is pointless trying to make
10364 any other type of stub. */
10365 if (!is_static_defined (&fdh->elf)
10366 && !is_static_defined (&h->elf))
10367 return ppc_stub_none;
10368 }
10369 else if (elf_local_got_ents (input_sec->owner) != NULL)
10370 {
10371 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (input_sec->owner);
10372 struct plt_entry **local_plt = (struct plt_entry **)
10373 elf_local_got_ents (input_sec->owner) + symtab_hdr->sh_info;
10374 unsigned long r_symndx = ELF64_R_SYM (rel->r_info);
10375
10376 if (local_plt[r_symndx] != NULL)
10377 {
10378 struct plt_entry *ent;
10379
10380 for (ent = local_plt[r_symndx]; ent != NULL; ent = ent->next)
10381 if (ent->addend == rel->r_addend
10382 && ent->plt.offset != (bfd_vma) -1)
10383 {
10384 *plt_ent = ent;
10385 return ppc_stub_plt_call;
10386 }
10387 }
10388 }
10389
10390 /* Determine where the call point is. */
10391 location = (input_sec->output_offset
10392 + input_sec->output_section->vma
10393 + rel->r_offset);
10394
10395 branch_offset = destination - location;
10396 r_type = ELF64_R_TYPE (rel->r_info);
10397
10398 /* Determine if a long branch stub is needed. */
10399 max_branch_offset = 1 << 25;
10400 if (r_type != R_PPC64_REL24)
10401 max_branch_offset = 1 << 15;
10402
10403 if (branch_offset + max_branch_offset >= 2 * max_branch_offset - local_off)
10404 /* We need a stub. Figure out whether a long_branch or plt_branch
10405 is needed later. */
10406 return ppc_stub_long_branch;
10407
10408 return ppc_stub_none;
10409 }
10410
10411 /* With power7 weakly ordered memory model, it is possible for ld.so
10412 to update a plt entry in one thread and have another thread see a
10413 stale zero toc entry. To avoid this we need some sort of acquire
10414 barrier in the call stub. One solution is to make the load of the
10415 toc word seem to appear to depend on the load of the function entry
10416 word. Another solution is to test for r2 being zero, and branch to
10417 the appropriate glink entry if so.
10418
10419 . fake dep barrier compare
10420 . ld 12,xxx(2) ld 12,xxx(2)
10421 . mtctr 12 mtctr 12
10422 . xor 11,12,12 ld 2,xxx+8(2)
10423 . add 2,2,11 cmpldi 2,0
10424 . ld 2,xxx+8(2) bnectr+
10425 . bctr b <glink_entry>
10426
10427 The solution involving the compare turns out to be faster, so
10428 that's what we use unless the branch won't reach. */
10429
10430 #define ALWAYS_USE_FAKE_DEP 0
10431 #define ALWAYS_EMIT_R2SAVE 0
10432
10433 #define PPC_LO(v) ((v) & 0xffff)
10434 #define PPC_HI(v) (((v) >> 16) & 0xffff)
10435 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
10436
10437 static inline unsigned int
10438 plt_stub_size (struct ppc_link_hash_table *htab,
10439 struct ppc_stub_hash_entry *stub_entry,
10440 bfd_vma off)
10441 {
10442 unsigned size = 12;
10443
10444 if (ALWAYS_EMIT_R2SAVE
10445 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10446 size += 4;
10447 if (PPC_HA (off) != 0)
10448 size += 4;
10449 if (htab->opd_abi)
10450 {
10451 size += 4;
10452 if (htab->params->plt_static_chain)
10453 size += 4;
10454 if (htab->params->plt_thread_safe
10455 && htab->elf.dynamic_sections_created
10456 && stub_entry->h != NULL
10457 && stub_entry->h->elf.dynindx != -1)
10458 size += 8;
10459 if (PPC_HA (off + 8 + 8 * htab->params->plt_static_chain) != PPC_HA (off))
10460 size += 4;
10461 }
10462 if (stub_entry->h != NULL
10463 && (stub_entry->h == htab->tls_get_addr_fd
10464 || stub_entry->h == htab->tls_get_addr)
10465 && htab->params->tls_get_addr_opt)
10466 size += 13 * 4;
10467 return size;
10468 }
10469
10470 /* If this stub would cross fewer 2**plt_stub_align boundaries if we align,
10471 then return the padding needed to do so. */
10472 static inline unsigned int
10473 plt_stub_pad (struct ppc_link_hash_table *htab,
10474 struct ppc_stub_hash_entry *stub_entry,
10475 bfd_vma plt_off)
10476 {
10477 int stub_align = 1 << htab->params->plt_stub_align;
10478 unsigned stub_size = plt_stub_size (htab, stub_entry, plt_off);
10479 bfd_vma stub_off = stub_entry->group->stub_sec->size;
10480
10481 if (((stub_off + stub_size - 1) & -stub_align) - (stub_off & -stub_align)
10482 > ((stub_size - 1) & -stub_align))
10483 return stub_align - (stub_off & (stub_align - 1));
10484 return 0;
10485 }
10486
10487 /* Build a .plt call stub. */
10488
10489 static inline bfd_byte *
10490 build_plt_stub (struct ppc_link_hash_table *htab,
10491 struct ppc_stub_hash_entry *stub_entry,
10492 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
10493 {
10494 bfd *obfd = htab->params->stub_bfd;
10495 bfd_boolean plt_load_toc = htab->opd_abi;
10496 bfd_boolean plt_static_chain = htab->params->plt_static_chain;
10497 bfd_boolean plt_thread_safe = (htab->params->plt_thread_safe
10498 && htab->elf.dynamic_sections_created
10499 && stub_entry->h != NULL
10500 && stub_entry->h->elf.dynindx != -1);
10501 bfd_boolean use_fake_dep = plt_thread_safe;
10502 bfd_vma cmp_branch_off = 0;
10503
10504 if (!ALWAYS_USE_FAKE_DEP
10505 && plt_load_toc
10506 && plt_thread_safe
10507 && !((stub_entry->h == htab->tls_get_addr_fd
10508 || stub_entry->h == htab->tls_get_addr)
10509 && htab->params->tls_get_addr_opt))
10510 {
10511 bfd_vma pltoff = stub_entry->plt_ent->plt.offset & ~1;
10512 bfd_vma pltindex = ((pltoff - PLT_INITIAL_ENTRY_SIZE (htab))
10513 / PLT_ENTRY_SIZE (htab));
10514 bfd_vma glinkoff = GLINK_CALL_STUB_SIZE + pltindex * 8;
10515 bfd_vma to, from;
10516
10517 if (pltindex > 32768)
10518 glinkoff += (pltindex - 32768) * 4;
10519 to = (glinkoff
10520 + htab->glink->output_offset
10521 + htab->glink->output_section->vma);
10522 from = (p - stub_entry->group->stub_sec->contents
10523 + 4 * (ALWAYS_EMIT_R2SAVE
10524 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10525 + 4 * (PPC_HA (offset) != 0)
10526 + 4 * (PPC_HA (offset + 8 + 8 * plt_static_chain)
10527 != PPC_HA (offset))
10528 + 4 * (plt_static_chain != 0)
10529 + 20
10530 + stub_entry->group->stub_sec->output_offset
10531 + stub_entry->group->stub_sec->output_section->vma);
10532 cmp_branch_off = to - from;
10533 use_fake_dep = cmp_branch_off + (1 << 25) >= (1 << 26);
10534 }
10535
10536 if (PPC_HA (offset) != 0)
10537 {
10538 if (r != NULL)
10539 {
10540 if (ALWAYS_EMIT_R2SAVE
10541 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10542 r[0].r_offset += 4;
10543 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
10544 r[1].r_offset = r[0].r_offset + 4;
10545 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10546 r[1].r_addend = r[0].r_addend;
10547 if (plt_load_toc)
10548 {
10549 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10550 {
10551 r[2].r_offset = r[1].r_offset + 4;
10552 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO);
10553 r[2].r_addend = r[0].r_addend;
10554 }
10555 else
10556 {
10557 r[2].r_offset = r[1].r_offset + 8 + 8 * use_fake_dep;
10558 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10559 r[2].r_addend = r[0].r_addend + 8;
10560 if (plt_static_chain)
10561 {
10562 r[3].r_offset = r[2].r_offset + 4;
10563 r[3].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10564 r[3].r_addend = r[0].r_addend + 16;
10565 }
10566 }
10567 }
10568 }
10569 if (ALWAYS_EMIT_R2SAVE
10570 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10571 bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p), p += 4;
10572 if (plt_load_toc)
10573 {
10574 bfd_put_32 (obfd, ADDIS_R11_R2 | PPC_HA (offset), p), p += 4;
10575 bfd_put_32 (obfd, LD_R12_0R11 | PPC_LO (offset), p), p += 4;
10576 }
10577 else
10578 {
10579 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
10580 bfd_put_32 (obfd, LD_R12_0R12 | PPC_LO (offset), p), p += 4;
10581 }
10582 if (plt_load_toc
10583 && PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10584 {
10585 bfd_put_32 (obfd, ADDI_R11_R11 | PPC_LO (offset), p), p += 4;
10586 offset = 0;
10587 }
10588 bfd_put_32 (obfd, MTCTR_R12, p), p += 4;
10589 if (plt_load_toc)
10590 {
10591 if (use_fake_dep)
10592 {
10593 bfd_put_32 (obfd, XOR_R2_R12_R12, p), p += 4;
10594 bfd_put_32 (obfd, ADD_R11_R11_R2, p), p += 4;
10595 }
10596 bfd_put_32 (obfd, LD_R2_0R11 | PPC_LO (offset + 8), p), p += 4;
10597 if (plt_static_chain)
10598 bfd_put_32 (obfd, LD_R11_0R11 | PPC_LO (offset + 16), p), p += 4;
10599 }
10600 }
10601 else
10602 {
10603 if (r != NULL)
10604 {
10605 if (ALWAYS_EMIT_R2SAVE
10606 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10607 r[0].r_offset += 4;
10608 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10609 if (plt_load_toc)
10610 {
10611 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10612 {
10613 r[1].r_offset = r[0].r_offset + 4;
10614 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16);
10615 r[1].r_addend = r[0].r_addend;
10616 }
10617 else
10618 {
10619 r[1].r_offset = r[0].r_offset + 8 + 8 * use_fake_dep;
10620 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10621 r[1].r_addend = r[0].r_addend + 8 + 8 * plt_static_chain;
10622 if (plt_static_chain)
10623 {
10624 r[2].r_offset = r[1].r_offset + 4;
10625 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10626 r[2].r_addend = r[0].r_addend + 8;
10627 }
10628 }
10629 }
10630 }
10631 if (ALWAYS_EMIT_R2SAVE
10632 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10633 bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p), p += 4;
10634 bfd_put_32 (obfd, LD_R12_0R2 | PPC_LO (offset), p), p += 4;
10635 if (plt_load_toc
10636 && PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10637 {
10638 bfd_put_32 (obfd, ADDI_R2_R2 | PPC_LO (offset), p), p += 4;
10639 offset = 0;
10640 }
10641 bfd_put_32 (obfd, MTCTR_R12, p), p += 4;
10642 if (plt_load_toc)
10643 {
10644 if (use_fake_dep)
10645 {
10646 bfd_put_32 (obfd, XOR_R11_R12_R12, p), p += 4;
10647 bfd_put_32 (obfd, ADD_R2_R2_R11, p), p += 4;
10648 }
10649 if (plt_static_chain)
10650 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset + 16), p), p += 4;
10651 bfd_put_32 (obfd, LD_R2_0R2 | PPC_LO (offset + 8), p), p += 4;
10652 }
10653 }
10654 if (plt_load_toc && plt_thread_safe && !use_fake_dep)
10655 {
10656 bfd_put_32 (obfd, CMPLDI_R2_0, p), p += 4;
10657 bfd_put_32 (obfd, BNECTR_P4, p), p += 4;
10658 bfd_put_32 (obfd, B_DOT | (cmp_branch_off & 0x3fffffc), p), p += 4;
10659 }
10660 else
10661 bfd_put_32 (obfd, BCTR, p), p += 4;
10662 return p;
10663 }
10664
10665 /* Build a special .plt call stub for __tls_get_addr. */
10666
10667 #define LD_R11_0R3 0xe9630000
10668 #define LD_R12_0R3 0xe9830000
10669 #define MR_R0_R3 0x7c601b78
10670 #define CMPDI_R11_0 0x2c2b0000
10671 #define ADD_R3_R12_R13 0x7c6c6a14
10672 #define BEQLR 0x4d820020
10673 #define MR_R3_R0 0x7c030378
10674 #define STD_R11_0R1 0xf9610000
10675 #define BCTRL 0x4e800421
10676 #define LD_R11_0R1 0xe9610000
10677 #define MTLR_R11 0x7d6803a6
10678
10679 static inline bfd_byte *
10680 build_tls_get_addr_stub (struct ppc_link_hash_table *htab,
10681 struct ppc_stub_hash_entry *stub_entry,
10682 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
10683 {
10684 bfd *obfd = htab->params->stub_bfd;
10685
10686 bfd_put_32 (obfd, LD_R11_0R3 + 0, p), p += 4;
10687 bfd_put_32 (obfd, LD_R12_0R3 + 8, p), p += 4;
10688 bfd_put_32 (obfd, MR_R0_R3, p), p += 4;
10689 bfd_put_32 (obfd, CMPDI_R11_0, p), p += 4;
10690 bfd_put_32 (obfd, ADD_R3_R12_R13, p), p += 4;
10691 bfd_put_32 (obfd, BEQLR, p), p += 4;
10692 bfd_put_32 (obfd, MR_R3_R0, p), p += 4;
10693 bfd_put_32 (obfd, MFLR_R11, p), p += 4;
10694 bfd_put_32 (obfd, STD_R11_0R1 + STK_LINKER (htab), p), p += 4;
10695
10696 if (r != NULL)
10697 r[0].r_offset += 9 * 4;
10698 p = build_plt_stub (htab, stub_entry, p, offset, r);
10699 bfd_put_32 (obfd, BCTRL, p - 4);
10700
10701 bfd_put_32 (obfd, LD_R2_0R1 + STK_TOC (htab), p), p += 4;
10702 bfd_put_32 (obfd, LD_R11_0R1 + STK_LINKER (htab), p), p += 4;
10703 bfd_put_32 (obfd, MTLR_R11, p), p += 4;
10704 bfd_put_32 (obfd, BLR, p), p += 4;
10705
10706 return p;
10707 }
10708
10709 static Elf_Internal_Rela *
10710 get_relocs (asection *sec, int count)
10711 {
10712 Elf_Internal_Rela *relocs;
10713 struct bfd_elf_section_data *elfsec_data;
10714
10715 elfsec_data = elf_section_data (sec);
10716 relocs = elfsec_data->relocs;
10717 if (relocs == NULL)
10718 {
10719 bfd_size_type relsize;
10720 relsize = sec->reloc_count * sizeof (*relocs);
10721 relocs = bfd_alloc (sec->owner, relsize);
10722 if (relocs == NULL)
10723 return NULL;
10724 elfsec_data->relocs = relocs;
10725 elfsec_data->rela.hdr = bfd_zalloc (sec->owner,
10726 sizeof (Elf_Internal_Shdr));
10727 if (elfsec_data->rela.hdr == NULL)
10728 return NULL;
10729 elfsec_data->rela.hdr->sh_size = (sec->reloc_count
10730 * sizeof (Elf64_External_Rela));
10731 elfsec_data->rela.hdr->sh_entsize = sizeof (Elf64_External_Rela);
10732 sec->reloc_count = 0;
10733 }
10734 relocs += sec->reloc_count;
10735 sec->reloc_count += count;
10736 return relocs;
10737 }
10738
10739 static bfd_vma
10740 get_r2off (struct bfd_link_info *info,
10741 struct ppc_stub_hash_entry *stub_entry)
10742 {
10743 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10744 bfd_vma r2off = htab->sec_info[stub_entry->target_section->id].toc_off;
10745
10746 if (r2off == 0)
10747 {
10748 /* Support linking -R objects. Get the toc pointer from the
10749 opd entry. */
10750 char buf[8];
10751 if (!htab->opd_abi)
10752 return r2off;
10753 asection *opd = stub_entry->h->elf.root.u.def.section;
10754 bfd_vma opd_off = stub_entry->h->elf.root.u.def.value;
10755
10756 if (strcmp (opd->name, ".opd") != 0
10757 || opd->reloc_count != 0)
10758 {
10759 info->callbacks->einfo (_("%P: cannot find opd entry toc for `%T'\n"),
10760 stub_entry->h->elf.root.root.string);
10761 bfd_set_error (bfd_error_bad_value);
10762 return (bfd_vma) -1;
10763 }
10764 if (!bfd_get_section_contents (opd->owner, opd, buf, opd_off + 8, 8))
10765 return (bfd_vma) -1;
10766 r2off = bfd_get_64 (opd->owner, buf);
10767 r2off -= elf_gp (info->output_bfd);
10768 }
10769 r2off -= htab->sec_info[stub_entry->group->link_sec->id].toc_off;
10770 return r2off;
10771 }
10772
10773 static bfd_boolean
10774 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
10775 {
10776 struct ppc_stub_hash_entry *stub_entry;
10777 struct ppc_branch_hash_entry *br_entry;
10778 struct bfd_link_info *info;
10779 struct ppc_link_hash_table *htab;
10780 bfd_byte *loc;
10781 bfd_byte *p;
10782 bfd_vma dest, off;
10783 int size;
10784 Elf_Internal_Rela *r;
10785 asection *plt;
10786
10787 /* Massage our args to the form they really have. */
10788 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
10789 info = in_arg;
10790
10791 htab = ppc_hash_table (info);
10792 if (htab == NULL)
10793 return FALSE;
10794
10795 /* Make a note of the offset within the stubs for this entry. */
10796 stub_entry->stub_offset = stub_entry->group->stub_sec->size;
10797 loc = stub_entry->group->stub_sec->contents + stub_entry->stub_offset;
10798
10799 htab->stub_count[stub_entry->stub_type - 1] += 1;
10800 switch (stub_entry->stub_type)
10801 {
10802 case ppc_stub_long_branch:
10803 case ppc_stub_long_branch_r2off:
10804 /* Branches are relative. This is where we are going to. */
10805 dest = (stub_entry->target_value
10806 + stub_entry->target_section->output_offset
10807 + stub_entry->target_section->output_section->vma);
10808 dest += PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
10809 off = dest;
10810
10811 /* And this is where we are coming from. */
10812 off -= (stub_entry->stub_offset
10813 + stub_entry->group->stub_sec->output_offset
10814 + stub_entry->group->stub_sec->output_section->vma);
10815
10816 size = 4;
10817 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
10818 {
10819 bfd_vma r2off = get_r2off (info, stub_entry);
10820
10821 if (r2off == (bfd_vma) -1)
10822 {
10823 htab->stub_error = TRUE;
10824 return FALSE;
10825 }
10826 bfd_put_32 (htab->params->stub_bfd, STD_R2_0R1 + STK_TOC (htab), loc);
10827 loc += 4;
10828 size = 8;
10829 if (PPC_HA (r2off) != 0)
10830 {
10831 bfd_put_32 (htab->params->stub_bfd,
10832 ADDIS_R2_R2 | PPC_HA (r2off), loc);
10833 loc += 4;
10834 size += 4;
10835 }
10836 if (PPC_LO (r2off) != 0)
10837 {
10838 bfd_put_32 (htab->params->stub_bfd,
10839 ADDI_R2_R2 | PPC_LO (r2off), loc);
10840 loc += 4;
10841 size += 4;
10842 }
10843 off -= size - 4;
10844 }
10845 bfd_put_32 (htab->params->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
10846
10847 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
10848 {
10849 info->callbacks->einfo
10850 (_("%P: long branch stub `%s' offset overflow\n"),
10851 stub_entry->root.string);
10852 htab->stub_error = TRUE;
10853 return FALSE;
10854 }
10855
10856 if (info->emitrelocations)
10857 {
10858 r = get_relocs (stub_entry->group->stub_sec, 1);
10859 if (r == NULL)
10860 return FALSE;
10861 r->r_offset = loc - stub_entry->group->stub_sec->contents;
10862 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
10863 r->r_addend = dest;
10864 if (stub_entry->h != NULL)
10865 {
10866 struct elf_link_hash_entry **hashes;
10867 unsigned long symndx;
10868 struct ppc_link_hash_entry *h;
10869
10870 hashes = elf_sym_hashes (htab->params->stub_bfd);
10871 if (hashes == NULL)
10872 {
10873 bfd_size_type hsize;
10874
10875 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
10876 hashes = bfd_zalloc (htab->params->stub_bfd, hsize);
10877 if (hashes == NULL)
10878 return FALSE;
10879 elf_sym_hashes (htab->params->stub_bfd) = hashes;
10880 htab->stub_globals = 1;
10881 }
10882 symndx = htab->stub_globals++;
10883 h = stub_entry->h;
10884 hashes[symndx] = &h->elf;
10885 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
10886 if (h->oh != NULL && h->oh->is_func)
10887 h = ppc_follow_link (h->oh);
10888 if (h->elf.root.u.def.section != stub_entry->target_section)
10889 /* H is an opd symbol. The addend must be zero. */
10890 r->r_addend = 0;
10891 else
10892 {
10893 off = (h->elf.root.u.def.value
10894 + h->elf.root.u.def.section->output_offset
10895 + h->elf.root.u.def.section->output_section->vma);
10896 r->r_addend -= off;
10897 }
10898 }
10899 }
10900 break;
10901
10902 case ppc_stub_plt_branch:
10903 case ppc_stub_plt_branch_r2off:
10904 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
10905 stub_entry->root.string + 9,
10906 FALSE, FALSE);
10907 if (br_entry == NULL)
10908 {
10909 info->callbacks->einfo (_("%P: can't find branch stub `%s'\n"),
10910 stub_entry->root.string);
10911 htab->stub_error = TRUE;
10912 return FALSE;
10913 }
10914
10915 dest = (stub_entry->target_value
10916 + stub_entry->target_section->output_offset
10917 + stub_entry->target_section->output_section->vma);
10918 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
10919 dest += PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
10920
10921 bfd_put_64 (htab->brlt->owner, dest,
10922 htab->brlt->contents + br_entry->offset);
10923
10924 if (br_entry->iter == htab->stub_iteration)
10925 {
10926 br_entry->iter = 0;
10927
10928 if (htab->relbrlt != NULL)
10929 {
10930 /* Create a reloc for the branch lookup table entry. */
10931 Elf_Internal_Rela rela;
10932 bfd_byte *rl;
10933
10934 rela.r_offset = (br_entry->offset
10935 + htab->brlt->output_offset
10936 + htab->brlt->output_section->vma);
10937 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
10938 rela.r_addend = dest;
10939
10940 rl = htab->relbrlt->contents;
10941 rl += (htab->relbrlt->reloc_count++
10942 * sizeof (Elf64_External_Rela));
10943 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
10944 }
10945 else if (info->emitrelocations)
10946 {
10947 r = get_relocs (htab->brlt, 1);
10948 if (r == NULL)
10949 return FALSE;
10950 /* brlt, being SEC_LINKER_CREATED does not go through the
10951 normal reloc processing. Symbols and offsets are not
10952 translated from input file to output file form, so
10953 set up the offset per the output file. */
10954 r->r_offset = (br_entry->offset
10955 + htab->brlt->output_offset
10956 + htab->brlt->output_section->vma);
10957 r->r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
10958 r->r_addend = dest;
10959 }
10960 }
10961
10962 dest = (br_entry->offset
10963 + htab->brlt->output_offset
10964 + htab->brlt->output_section->vma);
10965
10966 off = (dest
10967 - elf_gp (htab->brlt->output_section->owner)
10968 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
10969
10970 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
10971 {
10972 info->callbacks->einfo
10973 (_("%P: linkage table error against `%T'\n"),
10974 stub_entry->root.string);
10975 bfd_set_error (bfd_error_bad_value);
10976 htab->stub_error = TRUE;
10977 return FALSE;
10978 }
10979
10980 if (info->emitrelocations)
10981 {
10982 r = get_relocs (stub_entry->group->stub_sec, 1 + (PPC_HA (off) != 0));
10983 if (r == NULL)
10984 return FALSE;
10985 r[0].r_offset = loc - stub_entry->group->stub_sec->contents;
10986 if (bfd_big_endian (info->output_bfd))
10987 r[0].r_offset += 2;
10988 if (stub_entry->stub_type == ppc_stub_plt_branch_r2off)
10989 r[0].r_offset += 4;
10990 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10991 r[0].r_addend = dest;
10992 if (PPC_HA (off) != 0)
10993 {
10994 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
10995 r[1].r_offset = r[0].r_offset + 4;
10996 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10997 r[1].r_addend = r[0].r_addend;
10998 }
10999 }
11000
11001 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
11002 {
11003 if (PPC_HA (off) != 0)
11004 {
11005 size = 16;
11006 bfd_put_32 (htab->params->stub_bfd,
11007 ADDIS_R12_R2 | PPC_HA (off), loc);
11008 loc += 4;
11009 bfd_put_32 (htab->params->stub_bfd,
11010 LD_R12_0R12 | PPC_LO (off), loc);
11011 }
11012 else
11013 {
11014 size = 12;
11015 bfd_put_32 (htab->params->stub_bfd,
11016 LD_R12_0R2 | PPC_LO (off), loc);
11017 }
11018 }
11019 else
11020 {
11021 bfd_vma r2off = get_r2off (info, stub_entry);
11022
11023 if (r2off == (bfd_vma) -1)
11024 {
11025 htab->stub_error = TRUE;
11026 return FALSE;
11027 }
11028
11029 bfd_put_32 (htab->params->stub_bfd, STD_R2_0R1 + STK_TOC (htab), loc);
11030 loc += 4;
11031 size = 16;
11032 if (PPC_HA (off) != 0)
11033 {
11034 size += 4;
11035 bfd_put_32 (htab->params->stub_bfd,
11036 ADDIS_R12_R2 | PPC_HA (off), loc);
11037 loc += 4;
11038 bfd_put_32 (htab->params->stub_bfd,
11039 LD_R12_0R12 | PPC_LO (off), loc);
11040 }
11041 else
11042 bfd_put_32 (htab->params->stub_bfd, LD_R12_0R2 | PPC_LO (off), loc);
11043
11044 if (PPC_HA (r2off) != 0)
11045 {
11046 size += 4;
11047 loc += 4;
11048 bfd_put_32 (htab->params->stub_bfd,
11049 ADDIS_R2_R2 | PPC_HA (r2off), loc);
11050 }
11051 if (PPC_LO (r2off) != 0)
11052 {
11053 size += 4;
11054 loc += 4;
11055 bfd_put_32 (htab->params->stub_bfd,
11056 ADDI_R2_R2 | PPC_LO (r2off), loc);
11057 }
11058 }
11059 loc += 4;
11060 bfd_put_32 (htab->params->stub_bfd, MTCTR_R12, loc);
11061 loc += 4;
11062 bfd_put_32 (htab->params->stub_bfd, BCTR, loc);
11063 break;
11064
11065 case ppc_stub_plt_call:
11066 case ppc_stub_plt_call_r2save:
11067 if (stub_entry->h != NULL
11068 && stub_entry->h->is_func_descriptor
11069 && stub_entry->h->oh != NULL)
11070 {
11071 struct ppc_link_hash_entry *fh = ppc_follow_link (stub_entry->h->oh);
11072
11073 /* If the old-ABI "dot-symbol" is undefined make it weak so
11074 we don't get a link error from RELOC_FOR_GLOBAL_SYMBOL. */
11075 if (fh->elf.root.type == bfd_link_hash_undefined)
11076 fh->elf.root.type = bfd_link_hash_undefweak;
11077 /* Stop undo_symbol_twiddle changing it back to undefined. */
11078 fh->was_undefined = 0;
11079 }
11080
11081 /* Now build the stub. */
11082 dest = stub_entry->plt_ent->plt.offset & ~1;
11083 if (dest >= (bfd_vma) -2)
11084 abort ();
11085
11086 plt = htab->elf.splt;
11087 if (!htab->elf.dynamic_sections_created
11088 || stub_entry->h == NULL
11089 || stub_entry->h->elf.dynindx == -1)
11090 plt = htab->elf.iplt;
11091
11092 dest += plt->output_offset + plt->output_section->vma;
11093
11094 if (stub_entry->h == NULL
11095 && (stub_entry->plt_ent->plt.offset & 1) == 0)
11096 {
11097 Elf_Internal_Rela rela;
11098 bfd_byte *rl;
11099
11100 rela.r_offset = dest;
11101 if (htab->opd_abi)
11102 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
11103 else
11104 rela.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
11105 rela.r_addend = (stub_entry->target_value
11106 + stub_entry->target_section->output_offset
11107 + stub_entry->target_section->output_section->vma);
11108
11109 rl = (htab->elf.irelplt->contents
11110 + (htab->elf.irelplt->reloc_count++
11111 * sizeof (Elf64_External_Rela)));
11112 bfd_elf64_swap_reloca_out (info->output_bfd, &rela, rl);
11113 stub_entry->plt_ent->plt.offset |= 1;
11114 }
11115
11116 off = (dest
11117 - elf_gp (plt->output_section->owner)
11118 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11119
11120 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
11121 {
11122 info->callbacks->einfo
11123 (_("%P: linkage table error against `%T'\n"),
11124 stub_entry->h != NULL
11125 ? stub_entry->h->elf.root.root.string
11126 : "<local sym>");
11127 bfd_set_error (bfd_error_bad_value);
11128 htab->stub_error = TRUE;
11129 return FALSE;
11130 }
11131
11132 if (htab->params->plt_stub_align != 0)
11133 {
11134 unsigned pad = plt_stub_pad (htab, stub_entry, off);
11135
11136 stub_entry->group->stub_sec->size += pad;
11137 stub_entry->stub_offset = stub_entry->group->stub_sec->size;
11138 loc += pad;
11139 }
11140
11141 r = NULL;
11142 if (info->emitrelocations)
11143 {
11144 r = get_relocs (stub_entry->group->stub_sec,
11145 ((PPC_HA (off) != 0)
11146 + (htab->opd_abi
11147 ? 2 + (htab->params->plt_static_chain
11148 && PPC_HA (off + 16) == PPC_HA (off))
11149 : 1)));
11150 if (r == NULL)
11151 return FALSE;
11152 r[0].r_offset = loc - stub_entry->group->stub_sec->contents;
11153 if (bfd_big_endian (info->output_bfd))
11154 r[0].r_offset += 2;
11155 r[0].r_addend = dest;
11156 }
11157 if (stub_entry->h != NULL
11158 && (stub_entry->h == htab->tls_get_addr_fd
11159 || stub_entry->h == htab->tls_get_addr)
11160 && htab->params->tls_get_addr_opt)
11161 p = build_tls_get_addr_stub (htab, stub_entry, loc, off, r);
11162 else
11163 p = build_plt_stub (htab, stub_entry, loc, off, r);
11164 size = p - loc;
11165 break;
11166
11167 case ppc_stub_save_res:
11168 return TRUE;
11169
11170 default:
11171 BFD_FAIL ();
11172 return FALSE;
11173 }
11174
11175 stub_entry->group->stub_sec->size += size;
11176
11177 if (htab->params->emit_stub_syms)
11178 {
11179 struct elf_link_hash_entry *h;
11180 size_t len1, len2;
11181 char *name;
11182 const char *const stub_str[] = { "long_branch",
11183 "long_branch_r2off",
11184 "plt_branch",
11185 "plt_branch_r2off",
11186 "plt_call",
11187 "plt_call" };
11188
11189 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
11190 len2 = strlen (stub_entry->root.string);
11191 name = bfd_malloc (len1 + len2 + 2);
11192 if (name == NULL)
11193 return FALSE;
11194 memcpy (name, stub_entry->root.string, 9);
11195 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
11196 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
11197 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
11198 if (h == NULL)
11199 return FALSE;
11200 if (h->root.type == bfd_link_hash_new)
11201 {
11202 h->root.type = bfd_link_hash_defined;
11203 h->root.u.def.section = stub_entry->group->stub_sec;
11204 h->root.u.def.value = stub_entry->stub_offset;
11205 h->ref_regular = 1;
11206 h->def_regular = 1;
11207 h->ref_regular_nonweak = 1;
11208 h->forced_local = 1;
11209 h->non_elf = 0;
11210 h->root.linker_def = 1;
11211 }
11212 }
11213
11214 return TRUE;
11215 }
11216
11217 /* As above, but don't actually build the stub. Just bump offset so
11218 we know stub section sizes, and select plt_branch stubs where
11219 long_branch stubs won't do. */
11220
11221 static bfd_boolean
11222 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
11223 {
11224 struct ppc_stub_hash_entry *stub_entry;
11225 struct bfd_link_info *info;
11226 struct ppc_link_hash_table *htab;
11227 bfd_vma off;
11228 int size;
11229
11230 /* Massage our args to the form they really have. */
11231 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
11232 info = in_arg;
11233
11234 htab = ppc_hash_table (info);
11235 if (htab == NULL)
11236 return FALSE;
11237
11238 if (stub_entry->h != NULL
11239 && stub_entry->h->save_res
11240 && stub_entry->h->elf.root.type == bfd_link_hash_defined
11241 && stub_entry->h->elf.root.u.def.section == htab->sfpr)
11242 {
11243 /* Don't make stubs to out-of-line register save/restore
11244 functions. Instead, emit copies of the functions. */
11245 stub_entry->group->needs_save_res = 1;
11246 stub_entry->stub_type = ppc_stub_save_res;
11247 return TRUE;
11248 }
11249
11250 if (stub_entry->stub_type == ppc_stub_plt_call
11251 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
11252 {
11253 asection *plt;
11254 off = stub_entry->plt_ent->plt.offset & ~(bfd_vma) 1;
11255 if (off >= (bfd_vma) -2)
11256 abort ();
11257 plt = htab->elf.splt;
11258 if (!htab->elf.dynamic_sections_created
11259 || stub_entry->h == NULL
11260 || stub_entry->h->elf.dynindx == -1)
11261 plt = htab->elf.iplt;
11262 off += (plt->output_offset
11263 + plt->output_section->vma
11264 - elf_gp (plt->output_section->owner)
11265 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11266
11267 size = plt_stub_size (htab, stub_entry, off);
11268 if (htab->params->plt_stub_align)
11269 size += plt_stub_pad (htab, stub_entry, off);
11270 if (info->emitrelocations)
11271 {
11272 stub_entry->group->stub_sec->reloc_count
11273 += ((PPC_HA (off) != 0)
11274 + (htab->opd_abi
11275 ? 2 + (htab->params->plt_static_chain
11276 && PPC_HA (off + 16) == PPC_HA (off))
11277 : 1));
11278 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11279 }
11280 }
11281 else
11282 {
11283 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
11284 variants. */
11285 bfd_vma r2off = 0;
11286 bfd_vma local_off = 0;
11287
11288 off = (stub_entry->target_value
11289 + stub_entry->target_section->output_offset
11290 + stub_entry->target_section->output_section->vma);
11291 off -= (stub_entry->group->stub_sec->size
11292 + stub_entry->group->stub_sec->output_offset
11293 + stub_entry->group->stub_sec->output_section->vma);
11294
11295 /* Reset the stub type from the plt variant in case we now
11296 can reach with a shorter stub. */
11297 if (stub_entry->stub_type >= ppc_stub_plt_branch)
11298 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
11299
11300 size = 4;
11301 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
11302 {
11303 r2off = get_r2off (info, stub_entry);
11304 if (r2off == (bfd_vma) -1)
11305 {
11306 htab->stub_error = TRUE;
11307 return FALSE;
11308 }
11309 size = 8;
11310 if (PPC_HA (r2off) != 0)
11311 size += 4;
11312 if (PPC_LO (r2off) != 0)
11313 size += 4;
11314 off -= size - 4;
11315 }
11316
11317 local_off = PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
11318
11319 /* If the branch offset if too big, use a ppc_stub_plt_branch.
11320 Do the same for -R objects without function descriptors. */
11321 if (off + (1 << 25) >= (bfd_vma) (1 << 26) - local_off
11322 || (stub_entry->stub_type == ppc_stub_long_branch_r2off
11323 && r2off == 0
11324 && htab->sec_info[stub_entry->target_section->id].toc_off == 0))
11325 {
11326 struct ppc_branch_hash_entry *br_entry;
11327
11328 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
11329 stub_entry->root.string + 9,
11330 TRUE, FALSE);
11331 if (br_entry == NULL)
11332 {
11333 info->callbacks->einfo (_("%P: can't build branch stub `%s'\n"),
11334 stub_entry->root.string);
11335 htab->stub_error = TRUE;
11336 return FALSE;
11337 }
11338
11339 if (br_entry->iter != htab->stub_iteration)
11340 {
11341 br_entry->iter = htab->stub_iteration;
11342 br_entry->offset = htab->brlt->size;
11343 htab->brlt->size += 8;
11344
11345 if (htab->relbrlt != NULL)
11346 htab->relbrlt->size += sizeof (Elf64_External_Rela);
11347 else if (info->emitrelocations)
11348 {
11349 htab->brlt->reloc_count += 1;
11350 htab->brlt->flags |= SEC_RELOC;
11351 }
11352 }
11353
11354 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
11355 off = (br_entry->offset
11356 + htab->brlt->output_offset
11357 + htab->brlt->output_section->vma
11358 - elf_gp (htab->brlt->output_section->owner)
11359 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11360
11361 if (info->emitrelocations)
11362 {
11363 stub_entry->group->stub_sec->reloc_count
11364 += 1 + (PPC_HA (off) != 0);
11365 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11366 }
11367
11368 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
11369 {
11370 size = 12;
11371 if (PPC_HA (off) != 0)
11372 size = 16;
11373 }
11374 else
11375 {
11376 size = 16;
11377 if (PPC_HA (off) != 0)
11378 size += 4;
11379
11380 if (PPC_HA (r2off) != 0)
11381 size += 4;
11382 if (PPC_LO (r2off) != 0)
11383 size += 4;
11384 }
11385 }
11386 else if (info->emitrelocations)
11387 {
11388 stub_entry->group->stub_sec->reloc_count += 1;
11389 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11390 }
11391 }
11392
11393 stub_entry->group->stub_sec->size += size;
11394 return TRUE;
11395 }
11396
11397 /* Set up various things so that we can make a list of input sections
11398 for each output section included in the link. Returns -1 on error,
11399 0 when no stubs will be needed, and 1 on success. */
11400
11401 int
11402 ppc64_elf_setup_section_lists (struct bfd_link_info *info)
11403 {
11404 unsigned int id;
11405 bfd_size_type amt;
11406 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11407
11408 if (htab == NULL)
11409 return -1;
11410
11411 htab->sec_info_arr_size = bfd_get_next_section_id ();
11412 amt = sizeof (*htab->sec_info) * (htab->sec_info_arr_size);
11413 htab->sec_info = bfd_zmalloc (amt);
11414 if (htab->sec_info == NULL)
11415 return -1;
11416
11417 /* Set toc_off for com, und, abs and ind sections. */
11418 for (id = 0; id < 3; id++)
11419 htab->sec_info[id].toc_off = TOC_BASE_OFF;
11420
11421 return 1;
11422 }
11423
11424 /* Set up for first pass at multitoc partitioning. */
11425
11426 void
11427 ppc64_elf_start_multitoc_partition (struct bfd_link_info *info)
11428 {
11429 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11430
11431 htab->toc_curr = ppc64_elf_set_toc (info, info->output_bfd);
11432 htab->toc_bfd = NULL;
11433 htab->toc_first_sec = NULL;
11434 }
11435
11436 /* The linker repeatedly calls this function for each TOC input section
11437 and linker generated GOT section. Group input bfds such that the toc
11438 within a group is less than 64k in size. */
11439
11440 bfd_boolean
11441 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
11442 {
11443 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11444 bfd_vma addr, off, limit;
11445
11446 if (htab == NULL)
11447 return FALSE;
11448
11449 if (!htab->second_toc_pass)
11450 {
11451 /* Keep track of the first .toc or .got section for this input bfd. */
11452 bfd_boolean new_bfd = htab->toc_bfd != isec->owner;
11453
11454 if (new_bfd)
11455 {
11456 htab->toc_bfd = isec->owner;
11457 htab->toc_first_sec = isec;
11458 }
11459
11460 addr = isec->output_offset + isec->output_section->vma;
11461 off = addr - htab->toc_curr;
11462 limit = 0x80008000;
11463 if (ppc64_elf_tdata (isec->owner)->has_small_toc_reloc)
11464 limit = 0x10000;
11465 if (off + isec->size > limit)
11466 {
11467 addr = (htab->toc_first_sec->output_offset
11468 + htab->toc_first_sec->output_section->vma);
11469 htab->toc_curr = addr;
11470 htab->toc_curr &= -TOC_BASE_ALIGN;
11471 }
11472
11473 /* toc_curr is the base address of this toc group. Set elf_gp
11474 for the input section to be the offset relative to the
11475 output toc base plus 0x8000. Making the input elf_gp an
11476 offset allows us to move the toc as a whole without
11477 recalculating input elf_gp. */
11478 off = htab->toc_curr - elf_gp (isec->output_section->owner);
11479 off += TOC_BASE_OFF;
11480
11481 /* Die if someone uses a linker script that doesn't keep input
11482 file .toc and .got together. */
11483 if (new_bfd
11484 && elf_gp (isec->owner) != 0
11485 && elf_gp (isec->owner) != off)
11486 return FALSE;
11487
11488 elf_gp (isec->owner) = off;
11489 return TRUE;
11490 }
11491
11492 /* During the second pass toc_first_sec points to the start of
11493 a toc group, and toc_curr is used to track the old elf_gp.
11494 We use toc_bfd to ensure we only look at each bfd once. */
11495 if (htab->toc_bfd == isec->owner)
11496 return TRUE;
11497 htab->toc_bfd = isec->owner;
11498
11499 if (htab->toc_first_sec == NULL
11500 || htab->toc_curr != elf_gp (isec->owner))
11501 {
11502 htab->toc_curr = elf_gp (isec->owner);
11503 htab->toc_first_sec = isec;
11504 }
11505 addr = (htab->toc_first_sec->output_offset
11506 + htab->toc_first_sec->output_section->vma);
11507 off = addr - elf_gp (isec->output_section->owner) + TOC_BASE_OFF;
11508 elf_gp (isec->owner) = off;
11509
11510 return TRUE;
11511 }
11512
11513 /* Called via elf_link_hash_traverse to merge GOT entries for global
11514 symbol H. */
11515
11516 static bfd_boolean
11517 merge_global_got (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
11518 {
11519 if (h->root.type == bfd_link_hash_indirect)
11520 return TRUE;
11521
11522 merge_got_entries (&h->got.glist);
11523
11524 return TRUE;
11525 }
11526
11527 /* Called via elf_link_hash_traverse to allocate GOT entries for global
11528 symbol H. */
11529
11530 static bfd_boolean
11531 reallocate_got (struct elf_link_hash_entry *h, void *inf)
11532 {
11533 struct got_entry *gent;
11534
11535 if (h->root.type == bfd_link_hash_indirect)
11536 return TRUE;
11537
11538 for (gent = h->got.glist; gent != NULL; gent = gent->next)
11539 if (!gent->is_indirect)
11540 allocate_got (h, (struct bfd_link_info *) inf, gent);
11541 return TRUE;
11542 }
11543
11544 /* Called on the first multitoc pass after the last call to
11545 ppc64_elf_next_toc_section. This function removes duplicate GOT
11546 entries. */
11547
11548 bfd_boolean
11549 ppc64_elf_layout_multitoc (struct bfd_link_info *info)
11550 {
11551 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11552 struct bfd *ibfd, *ibfd2;
11553 bfd_boolean done_something;
11554
11555 htab->multi_toc_needed = htab->toc_curr != elf_gp (info->output_bfd);
11556
11557 if (!htab->do_multi_toc)
11558 return FALSE;
11559
11560 /* Merge global sym got entries within a toc group. */
11561 elf_link_hash_traverse (&htab->elf, merge_global_got, info);
11562
11563 /* And tlsld_got. */
11564 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11565 {
11566 struct got_entry *ent, *ent2;
11567
11568 if (!is_ppc64_elf (ibfd))
11569 continue;
11570
11571 ent = ppc64_tlsld_got (ibfd);
11572 if (!ent->is_indirect
11573 && ent->got.offset != (bfd_vma) -1)
11574 {
11575 for (ibfd2 = ibfd->link.next; ibfd2 != NULL; ibfd2 = ibfd2->link.next)
11576 {
11577 if (!is_ppc64_elf (ibfd2))
11578 continue;
11579
11580 ent2 = ppc64_tlsld_got (ibfd2);
11581 if (!ent2->is_indirect
11582 && ent2->got.offset != (bfd_vma) -1
11583 && elf_gp (ibfd2) == elf_gp (ibfd))
11584 {
11585 ent2->is_indirect = TRUE;
11586 ent2->got.ent = ent;
11587 }
11588 }
11589 }
11590 }
11591
11592 /* Zap sizes of got sections. */
11593 htab->elf.irelplt->rawsize = htab->elf.irelplt->size;
11594 htab->elf.irelplt->size -= htab->got_reli_size;
11595 htab->got_reli_size = 0;
11596
11597 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11598 {
11599 asection *got, *relgot;
11600
11601 if (!is_ppc64_elf (ibfd))
11602 continue;
11603
11604 got = ppc64_elf_tdata (ibfd)->got;
11605 if (got != NULL)
11606 {
11607 got->rawsize = got->size;
11608 got->size = 0;
11609 relgot = ppc64_elf_tdata (ibfd)->relgot;
11610 relgot->rawsize = relgot->size;
11611 relgot->size = 0;
11612 }
11613 }
11614
11615 /* Now reallocate the got, local syms first. We don't need to
11616 allocate section contents again since we never increase size. */
11617 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11618 {
11619 struct got_entry **lgot_ents;
11620 struct got_entry **end_lgot_ents;
11621 struct plt_entry **local_plt;
11622 struct plt_entry **end_local_plt;
11623 unsigned char *lgot_masks;
11624 bfd_size_type locsymcount;
11625 Elf_Internal_Shdr *symtab_hdr;
11626 asection *s;
11627
11628 if (!is_ppc64_elf (ibfd))
11629 continue;
11630
11631 lgot_ents = elf_local_got_ents (ibfd);
11632 if (!lgot_ents)
11633 continue;
11634
11635 symtab_hdr = &elf_symtab_hdr (ibfd);
11636 locsymcount = symtab_hdr->sh_info;
11637 end_lgot_ents = lgot_ents + locsymcount;
11638 local_plt = (struct plt_entry **) end_lgot_ents;
11639 end_local_plt = local_plt + locsymcount;
11640 lgot_masks = (unsigned char *) end_local_plt;
11641 s = ppc64_elf_tdata (ibfd)->got;
11642 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
11643 {
11644 struct got_entry *ent;
11645
11646 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
11647 {
11648 unsigned int ent_size = 8;
11649 unsigned int rel_size = sizeof (Elf64_External_Rela);
11650
11651 ent->got.offset = s->size;
11652 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
11653 {
11654 ent_size *= 2;
11655 rel_size *= 2;
11656 }
11657 s->size += ent_size;
11658 if ((*lgot_masks & PLT_IFUNC) != 0)
11659 {
11660 htab->elf.irelplt->size += rel_size;
11661 htab->got_reli_size += rel_size;
11662 }
11663 else if (bfd_link_pic (info))
11664 {
11665 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
11666 srel->size += rel_size;
11667 }
11668 }
11669 }
11670 }
11671
11672 elf_link_hash_traverse (&htab->elf, reallocate_got, info);
11673
11674 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11675 {
11676 struct got_entry *ent;
11677
11678 if (!is_ppc64_elf (ibfd))
11679 continue;
11680
11681 ent = ppc64_tlsld_got (ibfd);
11682 if (!ent->is_indirect
11683 && ent->got.offset != (bfd_vma) -1)
11684 {
11685 asection *s = ppc64_elf_tdata (ibfd)->got;
11686 ent->got.offset = s->size;
11687 s->size += 16;
11688 if (bfd_link_pic (info))
11689 {
11690 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
11691 srel->size += sizeof (Elf64_External_Rela);
11692 }
11693 }
11694 }
11695
11696 done_something = htab->elf.irelplt->rawsize != htab->elf.irelplt->size;
11697 if (!done_something)
11698 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11699 {
11700 asection *got;
11701
11702 if (!is_ppc64_elf (ibfd))
11703 continue;
11704
11705 got = ppc64_elf_tdata (ibfd)->got;
11706 if (got != NULL)
11707 {
11708 done_something = got->rawsize != got->size;
11709 if (done_something)
11710 break;
11711 }
11712 }
11713
11714 if (done_something)
11715 (*htab->params->layout_sections_again) ();
11716
11717 /* Set up for second pass over toc sections to recalculate elf_gp
11718 on input sections. */
11719 htab->toc_bfd = NULL;
11720 htab->toc_first_sec = NULL;
11721 htab->second_toc_pass = TRUE;
11722 return done_something;
11723 }
11724
11725 /* Called after second pass of multitoc partitioning. */
11726
11727 void
11728 ppc64_elf_finish_multitoc_partition (struct bfd_link_info *info)
11729 {
11730 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11731
11732 /* After the second pass, toc_curr tracks the TOC offset used
11733 for code sections below in ppc64_elf_next_input_section. */
11734 htab->toc_curr = TOC_BASE_OFF;
11735 }
11736
11737 /* No toc references were found in ISEC. If the code in ISEC makes no
11738 calls, then there's no need to use toc adjusting stubs when branching
11739 into ISEC. Actually, indirect calls from ISEC are OK as they will
11740 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
11741 needed, and 2 if a cyclical call-graph was found but no other reason
11742 for a stub was detected. If called from the top level, a return of
11743 2 means the same as a return of 0. */
11744
11745 static int
11746 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
11747 {
11748 int ret;
11749
11750 /* Mark this section as checked. */
11751 isec->call_check_done = 1;
11752
11753 /* We know none of our code bearing sections will need toc stubs. */
11754 if ((isec->flags & SEC_LINKER_CREATED) != 0)
11755 return 0;
11756
11757 if (isec->size == 0)
11758 return 0;
11759
11760 if (isec->output_section == NULL)
11761 return 0;
11762
11763 ret = 0;
11764 if (isec->reloc_count != 0)
11765 {
11766 Elf_Internal_Rela *relstart, *rel;
11767 Elf_Internal_Sym *local_syms;
11768 struct ppc_link_hash_table *htab;
11769
11770 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
11771 info->keep_memory);
11772 if (relstart == NULL)
11773 return -1;
11774
11775 /* Look for branches to outside of this section. */
11776 local_syms = NULL;
11777 htab = ppc_hash_table (info);
11778 if (htab == NULL)
11779 return -1;
11780
11781 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
11782 {
11783 enum elf_ppc64_reloc_type r_type;
11784 unsigned long r_symndx;
11785 struct elf_link_hash_entry *h;
11786 struct ppc_link_hash_entry *eh;
11787 Elf_Internal_Sym *sym;
11788 asection *sym_sec;
11789 struct _opd_sec_data *opd;
11790 bfd_vma sym_value;
11791 bfd_vma dest;
11792
11793 r_type = ELF64_R_TYPE (rel->r_info);
11794 if (r_type != R_PPC64_REL24
11795 && r_type != R_PPC64_REL14
11796 && r_type != R_PPC64_REL14_BRTAKEN
11797 && r_type != R_PPC64_REL14_BRNTAKEN)
11798 continue;
11799
11800 r_symndx = ELF64_R_SYM (rel->r_info);
11801 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
11802 isec->owner))
11803 {
11804 ret = -1;
11805 break;
11806 }
11807
11808 /* Calls to dynamic lib functions go through a plt call stub
11809 that uses r2. */
11810 eh = (struct ppc_link_hash_entry *) h;
11811 if (eh != NULL
11812 && (eh->elf.plt.plist != NULL
11813 || (eh->oh != NULL
11814 && ppc_follow_link (eh->oh)->elf.plt.plist != NULL)))
11815 {
11816 ret = 1;
11817 break;
11818 }
11819
11820 if (sym_sec == NULL)
11821 /* Ignore other undefined symbols. */
11822 continue;
11823
11824 /* Assume branches to other sections not included in the
11825 link need stubs too, to cover -R and absolute syms. */
11826 if (sym_sec->output_section == NULL)
11827 {
11828 ret = 1;
11829 break;
11830 }
11831
11832 if (h == NULL)
11833 sym_value = sym->st_value;
11834 else
11835 {
11836 if (h->root.type != bfd_link_hash_defined
11837 && h->root.type != bfd_link_hash_defweak)
11838 abort ();
11839 sym_value = h->root.u.def.value;
11840 }
11841 sym_value += rel->r_addend;
11842
11843 /* If this branch reloc uses an opd sym, find the code section. */
11844 opd = get_opd_info (sym_sec);
11845 if (opd != NULL)
11846 {
11847 if (h == NULL && opd->adjust != NULL)
11848 {
11849 long adjust;
11850
11851 adjust = opd->adjust[OPD_NDX (sym_value)];
11852 if (adjust == -1)
11853 /* Assume deleted functions won't ever be called. */
11854 continue;
11855 sym_value += adjust;
11856 }
11857
11858 dest = opd_entry_value (sym_sec, sym_value,
11859 &sym_sec, NULL, FALSE);
11860 if (dest == (bfd_vma) -1)
11861 continue;
11862 }
11863 else
11864 dest = (sym_value
11865 + sym_sec->output_offset
11866 + sym_sec->output_section->vma);
11867
11868 /* Ignore branch to self. */
11869 if (sym_sec == isec)
11870 continue;
11871
11872 /* If the called function uses the toc, we need a stub. */
11873 if (sym_sec->has_toc_reloc
11874 || sym_sec->makes_toc_func_call)
11875 {
11876 ret = 1;
11877 break;
11878 }
11879
11880 /* Assume any branch that needs a long branch stub might in fact
11881 need a plt_branch stub. A plt_branch stub uses r2. */
11882 else if (dest - (isec->output_offset
11883 + isec->output_section->vma
11884 + rel->r_offset) + (1 << 25)
11885 >= (2u << 25) - PPC64_LOCAL_ENTRY_OFFSET (h
11886 ? h->other
11887 : sym->st_other))
11888 {
11889 ret = 1;
11890 break;
11891 }
11892
11893 /* If calling back to a section in the process of being
11894 tested, we can't say for sure that no toc adjusting stubs
11895 are needed, so don't return zero. */
11896 else if (sym_sec->call_check_in_progress)
11897 ret = 2;
11898
11899 /* Branches to another section that itself doesn't have any TOC
11900 references are OK. Recursively call ourselves to check. */
11901 else if (!sym_sec->call_check_done)
11902 {
11903 int recur;
11904
11905 /* Mark current section as indeterminate, so that other
11906 sections that call back to current won't be marked as
11907 known. */
11908 isec->call_check_in_progress = 1;
11909 recur = toc_adjusting_stub_needed (info, sym_sec);
11910 isec->call_check_in_progress = 0;
11911
11912 if (recur != 0)
11913 {
11914 ret = recur;
11915 if (recur != 2)
11916 break;
11917 }
11918 }
11919 }
11920
11921 if (local_syms != NULL
11922 && (elf_symtab_hdr (isec->owner).contents
11923 != (unsigned char *) local_syms))
11924 free (local_syms);
11925 if (elf_section_data (isec)->relocs != relstart)
11926 free (relstart);
11927 }
11928
11929 if ((ret & 1) == 0
11930 && isec->map_head.s != NULL
11931 && (strcmp (isec->output_section->name, ".init") == 0
11932 || strcmp (isec->output_section->name, ".fini") == 0))
11933 {
11934 if (isec->map_head.s->has_toc_reloc
11935 || isec->map_head.s->makes_toc_func_call)
11936 ret = 1;
11937 else if (!isec->map_head.s->call_check_done)
11938 {
11939 int recur;
11940 isec->call_check_in_progress = 1;
11941 recur = toc_adjusting_stub_needed (info, isec->map_head.s);
11942 isec->call_check_in_progress = 0;
11943 if (recur != 0)
11944 ret = recur;
11945 }
11946 }
11947
11948 if (ret == 1)
11949 isec->makes_toc_func_call = 1;
11950
11951 return ret;
11952 }
11953
11954 /* The linker repeatedly calls this function for each input section,
11955 in the order that input sections are linked into output sections.
11956 Build lists of input sections to determine groupings between which
11957 we may insert linker stubs. */
11958
11959 bfd_boolean
11960 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
11961 {
11962 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11963
11964 if (htab == NULL)
11965 return FALSE;
11966
11967 if ((isec->output_section->flags & SEC_CODE) != 0
11968 && isec->output_section->id < htab->sec_info_arr_size)
11969 {
11970 /* This happens to make the list in reverse order,
11971 which is what we want. */
11972 htab->sec_info[isec->id].u.list
11973 = htab->sec_info[isec->output_section->id].u.list;
11974 htab->sec_info[isec->output_section->id].u.list = isec;
11975 }
11976
11977 if (htab->multi_toc_needed)
11978 {
11979 /* Analyse sections that aren't already flagged as needing a
11980 valid toc pointer. Exclude .fixup for the linux kernel.
11981 .fixup contains branches, but only back to the function that
11982 hit an exception. */
11983 if (!(isec->has_toc_reloc
11984 || (isec->flags & SEC_CODE) == 0
11985 || strcmp (isec->name, ".fixup") == 0
11986 || isec->call_check_done))
11987 {
11988 if (toc_adjusting_stub_needed (info, isec) < 0)
11989 return FALSE;
11990 }
11991 /* Make all sections use the TOC assigned for this object file.
11992 This will be wrong for pasted sections; We fix that in
11993 check_pasted_section(). */
11994 if (elf_gp (isec->owner) != 0)
11995 htab->toc_curr = elf_gp (isec->owner);
11996 }
11997
11998 htab->sec_info[isec->id].toc_off = htab->toc_curr;
11999 return TRUE;
12000 }
12001
12002 /* Check that all .init and .fini sections use the same toc, if they
12003 have toc relocs. */
12004
12005 static bfd_boolean
12006 check_pasted_section (struct bfd_link_info *info, const char *name)
12007 {
12008 asection *o = bfd_get_section_by_name (info->output_bfd, name);
12009
12010 if (o != NULL)
12011 {
12012 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12013 bfd_vma toc_off = 0;
12014 asection *i;
12015
12016 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
12017 if (i->has_toc_reloc)
12018 {
12019 if (toc_off == 0)
12020 toc_off = htab->sec_info[i->id].toc_off;
12021 else if (toc_off != htab->sec_info[i->id].toc_off)
12022 return FALSE;
12023 }
12024
12025 if (toc_off == 0)
12026 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
12027 if (i->makes_toc_func_call)
12028 {
12029 toc_off = htab->sec_info[i->id].toc_off;
12030 break;
12031 }
12032
12033 /* Make sure the whole pasted function uses the same toc offset. */
12034 if (toc_off != 0)
12035 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
12036 htab->sec_info[i->id].toc_off = toc_off;
12037 }
12038 return TRUE;
12039 }
12040
12041 bfd_boolean
12042 ppc64_elf_check_init_fini (struct bfd_link_info *info)
12043 {
12044 return (check_pasted_section (info, ".init")
12045 & check_pasted_section (info, ".fini"));
12046 }
12047
12048 /* See whether we can group stub sections together. Grouping stub
12049 sections may result in fewer stubs. More importantly, we need to
12050 put all .init* and .fini* stubs at the beginning of the .init or
12051 .fini output sections respectively, because glibc splits the
12052 _init and _fini functions into multiple parts. Putting a stub in
12053 the middle of a function is not a good idea. */
12054
12055 static bfd_boolean
12056 group_sections (struct bfd_link_info *info,
12057 bfd_size_type stub_group_size,
12058 bfd_boolean stubs_always_before_branch)
12059 {
12060 struct ppc_link_hash_table *htab;
12061 asection *osec;
12062 bfd_boolean suppress_size_errors;
12063
12064 htab = ppc_hash_table (info);
12065 if (htab == NULL)
12066 return FALSE;
12067
12068 suppress_size_errors = FALSE;
12069 if (stub_group_size == 1)
12070 {
12071 /* Default values. */
12072 if (stubs_always_before_branch)
12073 stub_group_size = 0x1e00000;
12074 else
12075 stub_group_size = 0x1c00000;
12076 suppress_size_errors = TRUE;
12077 }
12078
12079 for (osec = info->output_bfd->sections; osec != NULL; osec = osec->next)
12080 {
12081 asection *tail;
12082
12083 if (osec->id >= htab->sec_info_arr_size)
12084 continue;
12085
12086 tail = htab->sec_info[osec->id].u.list;
12087 while (tail != NULL)
12088 {
12089 asection *curr;
12090 asection *prev;
12091 bfd_size_type total;
12092 bfd_boolean big_sec;
12093 bfd_vma curr_toc;
12094 struct map_stub *group;
12095 bfd_size_type group_size;
12096
12097 curr = tail;
12098 total = tail->size;
12099 group_size = (ppc64_elf_section_data (tail) != NULL
12100 && ppc64_elf_section_data (tail)->has_14bit_branch
12101 ? stub_group_size >> 10 : stub_group_size);
12102
12103 big_sec = total > group_size;
12104 if (big_sec && !suppress_size_errors)
12105 (*_bfd_error_handler) (_("%B section %A exceeds stub group size"),
12106 tail->owner, tail);
12107 curr_toc = htab->sec_info[tail->id].toc_off;
12108
12109 while ((prev = htab->sec_info[curr->id].u.list) != NULL
12110 && ((total += curr->output_offset - prev->output_offset)
12111 < (ppc64_elf_section_data (prev) != NULL
12112 && ppc64_elf_section_data (prev)->has_14bit_branch
12113 ? (group_size = stub_group_size >> 10) : group_size))
12114 && htab->sec_info[prev->id].toc_off == curr_toc)
12115 curr = prev;
12116
12117 /* OK, the size from the start of CURR to the end is less
12118 than group_size and thus can be handled by one stub
12119 section. (or the tail section is itself larger than
12120 group_size, in which case we may be toast.) We should
12121 really be keeping track of the total size of stubs added
12122 here, as stubs contribute to the final output section
12123 size. That's a little tricky, and this way will only
12124 break if stubs added make the total size more than 2^25,
12125 ie. for the default stub_group_size, if stubs total more
12126 than 2097152 bytes, or nearly 75000 plt call stubs. */
12127 group = bfd_alloc (curr->owner, sizeof (*group));
12128 if (group == NULL)
12129 return FALSE;
12130 group->link_sec = curr;
12131 group->stub_sec = NULL;
12132 group->needs_save_res = 0;
12133 group->next = htab->group;
12134 htab->group = group;
12135 do
12136 {
12137 prev = htab->sec_info[tail->id].u.list;
12138 /* Set up this stub group. */
12139 htab->sec_info[tail->id].u.group = group;
12140 }
12141 while (tail != curr && (tail = prev) != NULL);
12142
12143 /* But wait, there's more! Input sections up to group_size
12144 bytes before the stub section can be handled by it too.
12145 Don't do this if we have a really large section after the
12146 stubs, as adding more stubs increases the chance that
12147 branches may not reach into the stub section. */
12148 if (!stubs_always_before_branch && !big_sec)
12149 {
12150 total = 0;
12151 while (prev != NULL
12152 && ((total += tail->output_offset - prev->output_offset)
12153 < (ppc64_elf_section_data (prev) != NULL
12154 && ppc64_elf_section_data (prev)->has_14bit_branch
12155 ? (group_size = stub_group_size >> 10) : group_size))
12156 && htab->sec_info[prev->id].toc_off == curr_toc)
12157 {
12158 tail = prev;
12159 prev = htab->sec_info[tail->id].u.list;
12160 htab->sec_info[tail->id].u.group = group;
12161 }
12162 }
12163 tail = prev;
12164 }
12165 }
12166 return TRUE;
12167 }
12168
12169 static const unsigned char glink_eh_frame_cie[] =
12170 {
12171 0, 0, 0, 16, /* length. */
12172 0, 0, 0, 0, /* id. */
12173 1, /* CIE version. */
12174 'z', 'R', 0, /* Augmentation string. */
12175 4, /* Code alignment. */
12176 0x78, /* Data alignment. */
12177 65, /* RA reg. */
12178 1, /* Augmentation size. */
12179 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
12180 DW_CFA_def_cfa, 1, 0, /* def_cfa: r1 offset 0. */
12181 0, 0, 0, 0
12182 };
12183
12184 /* Stripping output sections is normally done before dynamic section
12185 symbols have been allocated. This function is called later, and
12186 handles cases like htab->brlt which is mapped to its own output
12187 section. */
12188
12189 static void
12190 maybe_strip_output (struct bfd_link_info *info, asection *isec)
12191 {
12192 if (isec->size == 0
12193 && isec->output_section->size == 0
12194 && !(isec->output_section->flags & SEC_KEEP)
12195 && !bfd_section_removed_from_list (info->output_bfd,
12196 isec->output_section)
12197 && elf_section_data (isec->output_section)->dynindx == 0)
12198 {
12199 isec->output_section->flags |= SEC_EXCLUDE;
12200 bfd_section_list_remove (info->output_bfd, isec->output_section);
12201 info->output_bfd->section_count--;
12202 }
12203 }
12204
12205 /* Determine and set the size of the stub section for a final link.
12206
12207 The basic idea here is to examine all the relocations looking for
12208 PC-relative calls to a target that is unreachable with a "bl"
12209 instruction. */
12210
12211 bfd_boolean
12212 ppc64_elf_size_stubs (struct bfd_link_info *info)
12213 {
12214 bfd_size_type stub_group_size;
12215 bfd_boolean stubs_always_before_branch;
12216 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12217
12218 if (htab == NULL)
12219 return FALSE;
12220
12221 if (htab->params->plt_thread_safe == -1 && !bfd_link_executable (info))
12222 htab->params->plt_thread_safe = 1;
12223 if (!htab->opd_abi)
12224 htab->params->plt_thread_safe = 0;
12225 else if (htab->params->plt_thread_safe == -1)
12226 {
12227 static const char *const thread_starter[] =
12228 {
12229 "pthread_create",
12230 /* libstdc++ */
12231 "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE",
12232 /* librt */
12233 "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio",
12234 "mq_notify", "create_timer",
12235 /* libanl */
12236 "getaddrinfo_a",
12237 /* libgomp */
12238 "GOMP_parallel",
12239 "GOMP_parallel_start",
12240 "GOMP_parallel_loop_static",
12241 "GOMP_parallel_loop_static_start",
12242 "GOMP_parallel_loop_dynamic",
12243 "GOMP_parallel_loop_dynamic_start",
12244 "GOMP_parallel_loop_guided",
12245 "GOMP_parallel_loop_guided_start",
12246 "GOMP_parallel_loop_runtime",
12247 "GOMP_parallel_loop_runtime_start",
12248 "GOMP_parallel_sections",
12249 "GOMP_parallel_sections_start",
12250 /* libgo */
12251 "__go_go",
12252 };
12253 unsigned i;
12254
12255 for (i = 0; i < ARRAY_SIZE (thread_starter); i++)
12256 {
12257 struct elf_link_hash_entry *h;
12258 h = elf_link_hash_lookup (&htab->elf, thread_starter[i],
12259 FALSE, FALSE, TRUE);
12260 htab->params->plt_thread_safe = h != NULL && h->ref_regular;
12261 if (htab->params->plt_thread_safe)
12262 break;
12263 }
12264 }
12265 stubs_always_before_branch = htab->params->group_size < 0;
12266 if (htab->params->group_size < 0)
12267 stub_group_size = -htab->params->group_size;
12268 else
12269 stub_group_size = htab->params->group_size;
12270
12271 if (!group_sections (info, stub_group_size, stubs_always_before_branch))
12272 return FALSE;
12273
12274 #define STUB_SHRINK_ITER 20
12275 /* Loop until no stubs added. After iteration 20 of this loop we may
12276 exit on a stub section shrinking. This is to break out of a
12277 pathological case where adding stubs on one iteration decreases
12278 section gaps (perhaps due to alignment), which then requires
12279 fewer or smaller stubs on the next iteration. */
12280
12281 while (1)
12282 {
12283 bfd *input_bfd;
12284 unsigned int bfd_indx;
12285 struct map_stub *group;
12286 asection *stub_sec;
12287
12288 htab->stub_iteration += 1;
12289
12290 for (input_bfd = info->input_bfds, bfd_indx = 0;
12291 input_bfd != NULL;
12292 input_bfd = input_bfd->link.next, bfd_indx++)
12293 {
12294 Elf_Internal_Shdr *symtab_hdr;
12295 asection *section;
12296 Elf_Internal_Sym *local_syms = NULL;
12297
12298 if (!is_ppc64_elf (input_bfd))
12299 continue;
12300
12301 /* We'll need the symbol table in a second. */
12302 symtab_hdr = &elf_symtab_hdr (input_bfd);
12303 if (symtab_hdr->sh_info == 0)
12304 continue;
12305
12306 /* Walk over each section attached to the input bfd. */
12307 for (section = input_bfd->sections;
12308 section != NULL;
12309 section = section->next)
12310 {
12311 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
12312
12313 /* If there aren't any relocs, then there's nothing more
12314 to do. */
12315 if ((section->flags & SEC_RELOC) == 0
12316 || (section->flags & SEC_ALLOC) == 0
12317 || (section->flags & SEC_LOAD) == 0
12318 || (section->flags & SEC_CODE) == 0
12319 || section->reloc_count == 0)
12320 continue;
12321
12322 /* If this section is a link-once section that will be
12323 discarded, then don't create any stubs. */
12324 if (section->output_section == NULL
12325 || section->output_section->owner != info->output_bfd)
12326 continue;
12327
12328 /* Get the relocs. */
12329 internal_relocs
12330 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
12331 info->keep_memory);
12332 if (internal_relocs == NULL)
12333 goto error_ret_free_local;
12334
12335 /* Now examine each relocation. */
12336 irela = internal_relocs;
12337 irelaend = irela + section->reloc_count;
12338 for (; irela < irelaend; irela++)
12339 {
12340 enum elf_ppc64_reloc_type r_type;
12341 unsigned int r_indx;
12342 enum ppc_stub_type stub_type;
12343 struct ppc_stub_hash_entry *stub_entry;
12344 asection *sym_sec, *code_sec;
12345 bfd_vma sym_value, code_value;
12346 bfd_vma destination;
12347 unsigned long local_off;
12348 bfd_boolean ok_dest;
12349 struct ppc_link_hash_entry *hash;
12350 struct ppc_link_hash_entry *fdh;
12351 struct elf_link_hash_entry *h;
12352 Elf_Internal_Sym *sym;
12353 char *stub_name;
12354 const asection *id_sec;
12355 struct _opd_sec_data *opd;
12356 struct plt_entry *plt_ent;
12357
12358 r_type = ELF64_R_TYPE (irela->r_info);
12359 r_indx = ELF64_R_SYM (irela->r_info);
12360
12361 if (r_type >= R_PPC64_max)
12362 {
12363 bfd_set_error (bfd_error_bad_value);
12364 goto error_ret_free_internal;
12365 }
12366
12367 /* Only look for stubs on branch instructions. */
12368 if (r_type != R_PPC64_REL24
12369 && r_type != R_PPC64_REL14
12370 && r_type != R_PPC64_REL14_BRTAKEN
12371 && r_type != R_PPC64_REL14_BRNTAKEN)
12372 continue;
12373
12374 /* Now determine the call target, its name, value,
12375 section. */
12376 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
12377 r_indx, input_bfd))
12378 goto error_ret_free_internal;
12379 hash = (struct ppc_link_hash_entry *) h;
12380
12381 ok_dest = FALSE;
12382 fdh = NULL;
12383 sym_value = 0;
12384 if (hash == NULL)
12385 {
12386 sym_value = sym->st_value;
12387 if (sym_sec != NULL
12388 && sym_sec->output_section != NULL)
12389 ok_dest = TRUE;
12390 }
12391 else if (hash->elf.root.type == bfd_link_hash_defined
12392 || hash->elf.root.type == bfd_link_hash_defweak)
12393 {
12394 sym_value = hash->elf.root.u.def.value;
12395 if (sym_sec->output_section != NULL)
12396 ok_dest = TRUE;
12397 }
12398 else if (hash->elf.root.type == bfd_link_hash_undefweak
12399 || hash->elf.root.type == bfd_link_hash_undefined)
12400 {
12401 /* Recognise an old ABI func code entry sym, and
12402 use the func descriptor sym instead if it is
12403 defined. */
12404 if (hash->elf.root.root.string[0] == '.'
12405 && (fdh = lookup_fdh (hash, htab)) != NULL)
12406 {
12407 if (fdh->elf.root.type == bfd_link_hash_defined
12408 || fdh->elf.root.type == bfd_link_hash_defweak)
12409 {
12410 sym_sec = fdh->elf.root.u.def.section;
12411 sym_value = fdh->elf.root.u.def.value;
12412 if (sym_sec->output_section != NULL)
12413 ok_dest = TRUE;
12414 }
12415 else
12416 fdh = NULL;
12417 }
12418 }
12419 else
12420 {
12421 bfd_set_error (bfd_error_bad_value);
12422 goto error_ret_free_internal;
12423 }
12424
12425 destination = 0;
12426 local_off = 0;
12427 if (ok_dest)
12428 {
12429 sym_value += irela->r_addend;
12430 destination = (sym_value
12431 + sym_sec->output_offset
12432 + sym_sec->output_section->vma);
12433 local_off = PPC64_LOCAL_ENTRY_OFFSET (hash
12434 ? hash->elf.other
12435 : sym->st_other);
12436 }
12437
12438 code_sec = sym_sec;
12439 code_value = sym_value;
12440 opd = get_opd_info (sym_sec);
12441 if (opd != NULL)
12442 {
12443 bfd_vma dest;
12444
12445 if (hash == NULL && opd->adjust != NULL)
12446 {
12447 long adjust = opd->adjust[OPD_NDX (sym_value)];
12448 if (adjust == -1)
12449 continue;
12450 code_value += adjust;
12451 sym_value += adjust;
12452 }
12453 dest = opd_entry_value (sym_sec, sym_value,
12454 &code_sec, &code_value, FALSE);
12455 if (dest != (bfd_vma) -1)
12456 {
12457 destination = dest;
12458 if (fdh != NULL)
12459 {
12460 /* Fixup old ABI sym to point at code
12461 entry. */
12462 hash->elf.root.type = bfd_link_hash_defweak;
12463 hash->elf.root.u.def.section = code_sec;
12464 hash->elf.root.u.def.value = code_value;
12465 }
12466 }
12467 }
12468
12469 /* Determine what (if any) linker stub is needed. */
12470 plt_ent = NULL;
12471 stub_type = ppc_type_of_stub (section, irela, &hash,
12472 &plt_ent, destination,
12473 local_off);
12474
12475 if (stub_type != ppc_stub_plt_call)
12476 {
12477 /* Check whether we need a TOC adjusting stub.
12478 Since the linker pastes together pieces from
12479 different object files when creating the
12480 _init and _fini functions, it may be that a
12481 call to what looks like a local sym is in
12482 fact a call needing a TOC adjustment. */
12483 if (code_sec != NULL
12484 && code_sec->output_section != NULL
12485 && (htab->sec_info[code_sec->id].toc_off
12486 != htab->sec_info[section->id].toc_off)
12487 && (code_sec->has_toc_reloc
12488 || code_sec->makes_toc_func_call))
12489 stub_type = ppc_stub_long_branch_r2off;
12490 }
12491
12492 if (stub_type == ppc_stub_none)
12493 continue;
12494
12495 /* __tls_get_addr calls might be eliminated. */
12496 if (stub_type != ppc_stub_plt_call
12497 && hash != NULL
12498 && (hash == htab->tls_get_addr
12499 || hash == htab->tls_get_addr_fd)
12500 && section->has_tls_reloc
12501 && irela != internal_relocs)
12502 {
12503 /* Get tls info. */
12504 unsigned char *tls_mask;
12505
12506 if (!get_tls_mask (&tls_mask, NULL, NULL, &local_syms,
12507 irela - 1, input_bfd))
12508 goto error_ret_free_internal;
12509 if (*tls_mask != 0)
12510 continue;
12511 }
12512
12513 if (stub_type == ppc_stub_plt_call
12514 && irela + 1 < irelaend
12515 && irela[1].r_offset == irela->r_offset + 4
12516 && ELF64_R_TYPE (irela[1].r_info) == R_PPC64_TOCSAVE)
12517 {
12518 if (!tocsave_find (htab, INSERT,
12519 &local_syms, irela + 1, input_bfd))
12520 goto error_ret_free_internal;
12521 }
12522 else if (stub_type == ppc_stub_plt_call)
12523 stub_type = ppc_stub_plt_call_r2save;
12524
12525 /* Support for grouping stub sections. */
12526 id_sec = htab->sec_info[section->id].u.group->link_sec;
12527
12528 /* Get the name of this stub. */
12529 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
12530 if (!stub_name)
12531 goto error_ret_free_internal;
12532
12533 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
12534 stub_name, FALSE, FALSE);
12535 if (stub_entry != NULL)
12536 {
12537 /* The proper stub has already been created. */
12538 free (stub_name);
12539 if (stub_type == ppc_stub_plt_call_r2save)
12540 stub_entry->stub_type = stub_type;
12541 continue;
12542 }
12543
12544 stub_entry = ppc_add_stub (stub_name, section, info);
12545 if (stub_entry == NULL)
12546 {
12547 free (stub_name);
12548 error_ret_free_internal:
12549 if (elf_section_data (section)->relocs == NULL)
12550 free (internal_relocs);
12551 error_ret_free_local:
12552 if (local_syms != NULL
12553 && (symtab_hdr->contents
12554 != (unsigned char *) local_syms))
12555 free (local_syms);
12556 return FALSE;
12557 }
12558
12559 stub_entry->stub_type = stub_type;
12560 if (stub_type != ppc_stub_plt_call
12561 && stub_type != ppc_stub_plt_call_r2save)
12562 {
12563 stub_entry->target_value = code_value;
12564 stub_entry->target_section = code_sec;
12565 }
12566 else
12567 {
12568 stub_entry->target_value = sym_value;
12569 stub_entry->target_section = sym_sec;
12570 }
12571 stub_entry->h = hash;
12572 stub_entry->plt_ent = plt_ent;
12573 stub_entry->other = hash ? hash->elf.other : sym->st_other;
12574
12575 if (stub_entry->h != NULL)
12576 htab->stub_globals += 1;
12577 }
12578
12579 /* We're done with the internal relocs, free them. */
12580 if (elf_section_data (section)->relocs != internal_relocs)
12581 free (internal_relocs);
12582 }
12583
12584 if (local_syms != NULL
12585 && symtab_hdr->contents != (unsigned char *) local_syms)
12586 {
12587 if (!info->keep_memory)
12588 free (local_syms);
12589 else
12590 symtab_hdr->contents = (unsigned char *) local_syms;
12591 }
12592 }
12593
12594 /* We may have added some stubs. Find out the new size of the
12595 stub sections. */
12596 for (stub_sec = htab->params->stub_bfd->sections;
12597 stub_sec != NULL;
12598 stub_sec = stub_sec->next)
12599 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12600 {
12601 stub_sec->rawsize = stub_sec->size;
12602 stub_sec->size = 0;
12603 stub_sec->reloc_count = 0;
12604 stub_sec->flags &= ~SEC_RELOC;
12605 }
12606
12607 htab->brlt->size = 0;
12608 htab->brlt->reloc_count = 0;
12609 htab->brlt->flags &= ~SEC_RELOC;
12610 if (htab->relbrlt != NULL)
12611 htab->relbrlt->size = 0;
12612
12613 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
12614
12615 for (group = htab->group; group != NULL; group = group->next)
12616 if (group->needs_save_res)
12617 group->stub_sec->size += htab->sfpr->size;
12618
12619 if (info->emitrelocations
12620 && htab->glink != NULL && htab->glink->size != 0)
12621 {
12622 htab->glink->reloc_count = 1;
12623 htab->glink->flags |= SEC_RELOC;
12624 }
12625
12626 if (htab->glink_eh_frame != NULL
12627 && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
12628 && htab->glink_eh_frame->output_section->size != 0)
12629 {
12630 size_t size = 0, align;
12631
12632 for (stub_sec = htab->params->stub_bfd->sections;
12633 stub_sec != NULL;
12634 stub_sec = stub_sec->next)
12635 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12636 size += 24;
12637 if (htab->glink != NULL && htab->glink->size != 0)
12638 size += 24;
12639 if (size != 0)
12640 size += sizeof (glink_eh_frame_cie);
12641 align = 1;
12642 align <<= htab->glink_eh_frame->output_section->alignment_power;
12643 align -= 1;
12644 size = (size + align) & ~align;
12645 htab->glink_eh_frame->rawsize = htab->glink_eh_frame->size;
12646 htab->glink_eh_frame->size = size;
12647 }
12648
12649 if (htab->params->plt_stub_align != 0)
12650 for (stub_sec = htab->params->stub_bfd->sections;
12651 stub_sec != NULL;
12652 stub_sec = stub_sec->next)
12653 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12654 stub_sec->size = ((stub_sec->size
12655 + (1 << htab->params->plt_stub_align) - 1)
12656 & -(1 << htab->params->plt_stub_align));
12657
12658 for (stub_sec = htab->params->stub_bfd->sections;
12659 stub_sec != NULL;
12660 stub_sec = stub_sec->next)
12661 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
12662 && stub_sec->rawsize != stub_sec->size
12663 && (htab->stub_iteration <= STUB_SHRINK_ITER
12664 || stub_sec->rawsize < stub_sec->size))
12665 break;
12666
12667 if (stub_sec == NULL
12668 && (htab->glink_eh_frame == NULL
12669 || htab->glink_eh_frame->rawsize == htab->glink_eh_frame->size))
12670 break;
12671
12672 /* Ask the linker to do its stuff. */
12673 (*htab->params->layout_sections_again) ();
12674 }
12675
12676 if (htab->glink_eh_frame != NULL
12677 && htab->glink_eh_frame->size != 0)
12678 {
12679 bfd_vma val;
12680 bfd_byte *p, *last_fde;
12681 size_t last_fde_len, size, align, pad;
12682 asection *stub_sec;
12683
12684 p = bfd_zalloc (htab->glink_eh_frame->owner, htab->glink_eh_frame->size);
12685 if (p == NULL)
12686 return FALSE;
12687 htab->glink_eh_frame->contents = p;
12688 last_fde = p;
12689
12690 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
12691 /* CIE length (rewrite in case little-endian). */
12692 last_fde_len = sizeof (glink_eh_frame_cie) - 4;
12693 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
12694 p += sizeof (glink_eh_frame_cie);
12695
12696 for (stub_sec = htab->params->stub_bfd->sections;
12697 stub_sec != NULL;
12698 stub_sec = stub_sec->next)
12699 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12700 {
12701 last_fde = p;
12702 last_fde_len = 20;
12703 /* FDE length. */
12704 bfd_put_32 (htab->elf.dynobj, 20, p);
12705 p += 4;
12706 /* CIE pointer. */
12707 val = p - htab->glink_eh_frame->contents;
12708 bfd_put_32 (htab->elf.dynobj, val, p);
12709 p += 4;
12710 /* Offset to stub section, written later. */
12711 p += 4;
12712 /* stub section size. */
12713 bfd_put_32 (htab->elf.dynobj, stub_sec->size, p);
12714 p += 4;
12715 /* Augmentation. */
12716 p += 1;
12717 /* Pad. */
12718 p += 7;
12719 }
12720 if (htab->glink != NULL && htab->glink->size != 0)
12721 {
12722 last_fde = p;
12723 last_fde_len = 20;
12724 /* FDE length. */
12725 bfd_put_32 (htab->elf.dynobj, 20, p);
12726 p += 4;
12727 /* CIE pointer. */
12728 val = p - htab->glink_eh_frame->contents;
12729 bfd_put_32 (htab->elf.dynobj, val, p);
12730 p += 4;
12731 /* Offset to .glink, written later. */
12732 p += 4;
12733 /* .glink size. */
12734 bfd_put_32 (htab->elf.dynobj, htab->glink->size - 8, p);
12735 p += 4;
12736 /* Augmentation. */
12737 p += 1;
12738
12739 *p++ = DW_CFA_advance_loc + 1;
12740 *p++ = DW_CFA_register;
12741 *p++ = 65;
12742 *p++ = htab->opd_abi ? 12 : 0;
12743 *p++ = DW_CFA_advance_loc + 4;
12744 *p++ = DW_CFA_restore_extended;
12745 *p++ = 65;
12746 }
12747 /* Subsume any padding into the last FDE if user .eh_frame
12748 sections are aligned more than glink_eh_frame. Otherwise any
12749 zero padding will be seen as a terminator. */
12750 size = p - htab->glink_eh_frame->contents;
12751 align = 1;
12752 align <<= htab->glink_eh_frame->output_section->alignment_power;
12753 align -= 1;
12754 pad = ((size + align) & ~align) - size;
12755 htab->glink_eh_frame->size = size + pad;
12756 bfd_put_32 (htab->elf.dynobj, last_fde_len + pad, last_fde);
12757 }
12758
12759 maybe_strip_output (info, htab->brlt);
12760 if (htab->glink_eh_frame != NULL)
12761 maybe_strip_output (info, htab->glink_eh_frame);
12762
12763 return TRUE;
12764 }
12765
12766 /* Called after we have determined section placement. If sections
12767 move, we'll be called again. Provide a value for TOCstart. */
12768
12769 bfd_vma
12770 ppc64_elf_set_toc (struct bfd_link_info *info, bfd *obfd)
12771 {
12772 asection *s;
12773 bfd_vma TOCstart, adjust;
12774
12775 if (info != NULL)
12776 {
12777 struct elf_link_hash_entry *h;
12778 struct elf_link_hash_table *htab = elf_hash_table (info);
12779
12780 if (is_elf_hash_table (htab)
12781 && htab->hgot != NULL)
12782 h = htab->hgot;
12783 else
12784 {
12785 h = elf_link_hash_lookup (htab, ".TOC.", FALSE, FALSE, TRUE);
12786 if (is_elf_hash_table (htab))
12787 htab->hgot = h;
12788 }
12789 if (h != NULL
12790 && h->root.type == bfd_link_hash_defined
12791 && !h->root.linker_def
12792 && (!is_elf_hash_table (htab)
12793 || h->def_regular))
12794 {
12795 TOCstart = (h->root.u.def.value - TOC_BASE_OFF
12796 + h->root.u.def.section->output_offset
12797 + h->root.u.def.section->output_section->vma);
12798 _bfd_set_gp_value (obfd, TOCstart);
12799 return TOCstart;
12800 }
12801 }
12802
12803 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
12804 order. The TOC starts where the first of these sections starts. */
12805 s = bfd_get_section_by_name (obfd, ".got");
12806 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12807 s = bfd_get_section_by_name (obfd, ".toc");
12808 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12809 s = bfd_get_section_by_name (obfd, ".tocbss");
12810 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12811 s = bfd_get_section_by_name (obfd, ".plt");
12812 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12813 {
12814 /* This may happen for
12815 o references to TOC base (SYM@toc / TOC[tc0]) without a
12816 .toc directive
12817 o bad linker script
12818 o --gc-sections and empty TOC sections
12819
12820 FIXME: Warn user? */
12821
12822 /* Look for a likely section. We probably won't even be
12823 using TOCstart. */
12824 for (s = obfd->sections; s != NULL; s = s->next)
12825 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY
12826 | SEC_EXCLUDE))
12827 == (SEC_ALLOC | SEC_SMALL_DATA))
12828 break;
12829 if (s == NULL)
12830 for (s = obfd->sections; s != NULL; s = s->next)
12831 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_EXCLUDE))
12832 == (SEC_ALLOC | SEC_SMALL_DATA))
12833 break;
12834 if (s == NULL)
12835 for (s = obfd->sections; s != NULL; s = s->next)
12836 if ((s->flags & (SEC_ALLOC | SEC_READONLY | SEC_EXCLUDE))
12837 == SEC_ALLOC)
12838 break;
12839 if (s == NULL)
12840 for (s = obfd->sections; s != NULL; s = s->next)
12841 if ((s->flags & (SEC_ALLOC | SEC_EXCLUDE)) == SEC_ALLOC)
12842 break;
12843 }
12844
12845 TOCstart = 0;
12846 if (s != NULL)
12847 TOCstart = s->output_section->vma + s->output_offset;
12848
12849 /* Force alignment. */
12850 adjust = TOCstart & (TOC_BASE_ALIGN - 1);
12851 TOCstart -= adjust;
12852 _bfd_set_gp_value (obfd, TOCstart);
12853
12854 if (info != NULL && s != NULL)
12855 {
12856 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12857
12858 if (htab != NULL)
12859 {
12860 if (htab->elf.hgot != NULL)
12861 {
12862 htab->elf.hgot->root.u.def.value = TOC_BASE_OFF - adjust;
12863 htab->elf.hgot->root.u.def.section = s;
12864 }
12865 }
12866 else
12867 {
12868 struct bfd_link_hash_entry *bh = NULL;
12869 _bfd_generic_link_add_one_symbol (info, obfd, ".TOC.", BSF_GLOBAL,
12870 s, TOC_BASE_OFF - adjust,
12871 NULL, FALSE, FALSE, &bh);
12872 }
12873 }
12874 return TOCstart;
12875 }
12876
12877 /* Called via elf_link_hash_traverse from ppc64_elf_build_stubs to
12878 write out any global entry stubs. */
12879
12880 static bfd_boolean
12881 build_global_entry_stubs (struct elf_link_hash_entry *h, void *inf)
12882 {
12883 struct bfd_link_info *info;
12884 struct ppc_link_hash_table *htab;
12885 struct plt_entry *pent;
12886 asection *s;
12887
12888 if (h->root.type == bfd_link_hash_indirect)
12889 return TRUE;
12890
12891 if (!h->pointer_equality_needed)
12892 return TRUE;
12893
12894 if (h->def_regular)
12895 return TRUE;
12896
12897 info = inf;
12898 htab = ppc_hash_table (info);
12899 if (htab == NULL)
12900 return FALSE;
12901
12902 s = htab->glink;
12903 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
12904 if (pent->plt.offset != (bfd_vma) -1
12905 && pent->addend == 0)
12906 {
12907 bfd_byte *p;
12908 asection *plt;
12909 bfd_vma off;
12910
12911 p = s->contents + h->root.u.def.value;
12912 plt = htab->elf.splt;
12913 if (!htab->elf.dynamic_sections_created
12914 || h->dynindx == -1)
12915 plt = htab->elf.iplt;
12916 off = pent->plt.offset + plt->output_offset + plt->output_section->vma;
12917 off -= h->root.u.def.value + s->output_offset + s->output_section->vma;
12918
12919 if (off + 0x80008000 > 0xffffffff || (off & 3) != 0)
12920 {
12921 info->callbacks->einfo
12922 (_("%P: linkage table error against `%T'\n"),
12923 h->root.root.string);
12924 bfd_set_error (bfd_error_bad_value);
12925 htab->stub_error = TRUE;
12926 }
12927
12928 htab->stub_count[ppc_stub_global_entry - 1] += 1;
12929 if (htab->params->emit_stub_syms)
12930 {
12931 size_t len = strlen (h->root.root.string);
12932 char *name = bfd_malloc (sizeof "12345678.global_entry." + len);
12933
12934 if (name == NULL)
12935 return FALSE;
12936
12937 sprintf (name, "%08x.global_entry.%s", s->id, h->root.root.string);
12938 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
12939 if (h == NULL)
12940 return FALSE;
12941 if (h->root.type == bfd_link_hash_new)
12942 {
12943 h->root.type = bfd_link_hash_defined;
12944 h->root.u.def.section = s;
12945 h->root.u.def.value = p - s->contents;
12946 h->ref_regular = 1;
12947 h->def_regular = 1;
12948 h->ref_regular_nonweak = 1;
12949 h->forced_local = 1;
12950 h->non_elf = 0;
12951 h->root.linker_def = 1;
12952 }
12953 }
12954
12955 if (PPC_HA (off) != 0)
12956 {
12957 bfd_put_32 (s->owner, ADDIS_R12_R12 | PPC_HA (off), p);
12958 p += 4;
12959 }
12960 bfd_put_32 (s->owner, LD_R12_0R12 | PPC_LO (off), p);
12961 p += 4;
12962 bfd_put_32 (s->owner, MTCTR_R12, p);
12963 p += 4;
12964 bfd_put_32 (s->owner, BCTR, p);
12965 break;
12966 }
12967 return TRUE;
12968 }
12969
12970 /* Build all the stubs associated with the current output file.
12971 The stubs are kept in a hash table attached to the main linker
12972 hash table. This function is called via gldelf64ppc_finish. */
12973
12974 bfd_boolean
12975 ppc64_elf_build_stubs (struct bfd_link_info *info,
12976 char **stats)
12977 {
12978 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12979 struct map_stub *group;
12980 asection *stub_sec;
12981 bfd_byte *p;
12982 int stub_sec_count = 0;
12983
12984 if (htab == NULL)
12985 return FALSE;
12986
12987 /* Allocate memory to hold the linker stubs. */
12988 for (stub_sec = htab->params->stub_bfd->sections;
12989 stub_sec != NULL;
12990 stub_sec = stub_sec->next)
12991 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
12992 && stub_sec->size != 0)
12993 {
12994 stub_sec->contents = bfd_zalloc (htab->params->stub_bfd, stub_sec->size);
12995 if (stub_sec->contents == NULL)
12996 return FALSE;
12997 stub_sec->size = 0;
12998 }
12999
13000 if (htab->glink != NULL && htab->glink->size != 0)
13001 {
13002 unsigned int indx;
13003 bfd_vma plt0;
13004
13005 /* Build the .glink plt call stub. */
13006 if (htab->params->emit_stub_syms)
13007 {
13008 struct elf_link_hash_entry *h;
13009 h = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
13010 TRUE, FALSE, FALSE);
13011 if (h == NULL)
13012 return FALSE;
13013 if (h->root.type == bfd_link_hash_new)
13014 {
13015 h->root.type = bfd_link_hash_defined;
13016 h->root.u.def.section = htab->glink;
13017 h->root.u.def.value = 8;
13018 h->ref_regular = 1;
13019 h->def_regular = 1;
13020 h->ref_regular_nonweak = 1;
13021 h->forced_local = 1;
13022 h->non_elf = 0;
13023 h->root.linker_def = 1;
13024 }
13025 }
13026 plt0 = (htab->elf.splt->output_section->vma
13027 + htab->elf.splt->output_offset
13028 - 16);
13029 if (info->emitrelocations)
13030 {
13031 Elf_Internal_Rela *r = get_relocs (htab->glink, 1);
13032 if (r == NULL)
13033 return FALSE;
13034 r->r_offset = (htab->glink->output_offset
13035 + htab->glink->output_section->vma);
13036 r->r_info = ELF64_R_INFO (0, R_PPC64_REL64);
13037 r->r_addend = plt0;
13038 }
13039 p = htab->glink->contents;
13040 plt0 -= htab->glink->output_section->vma + htab->glink->output_offset;
13041 bfd_put_64 (htab->glink->owner, plt0, p);
13042 p += 8;
13043 if (htab->opd_abi)
13044 {
13045 bfd_put_32 (htab->glink->owner, MFLR_R12, p);
13046 p += 4;
13047 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
13048 p += 4;
13049 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
13050 p += 4;
13051 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | (-16 & 0xfffc), p);
13052 p += 4;
13053 bfd_put_32 (htab->glink->owner, MTLR_R12, p);
13054 p += 4;
13055 bfd_put_32 (htab->glink->owner, ADD_R11_R2_R11, p);
13056 p += 4;
13057 bfd_put_32 (htab->glink->owner, LD_R12_0R11, p);
13058 p += 4;
13059 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | 8, p);
13060 p += 4;
13061 bfd_put_32 (htab->glink->owner, MTCTR_R12, p);
13062 p += 4;
13063 bfd_put_32 (htab->glink->owner, LD_R11_0R11 | 16, p);
13064 p += 4;
13065 }
13066 else
13067 {
13068 bfd_put_32 (htab->glink->owner, MFLR_R0, p);
13069 p += 4;
13070 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
13071 p += 4;
13072 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
13073 p += 4;
13074 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | (-16 & 0xfffc), p);
13075 p += 4;
13076 bfd_put_32 (htab->glink->owner, MTLR_R0, p);
13077 p += 4;
13078 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
13079 p += 4;
13080 bfd_put_32 (htab->glink->owner, ADD_R11_R2_R11, p);
13081 p += 4;
13082 bfd_put_32 (htab->glink->owner, ADDI_R0_R12 | (-48 & 0xffff), p);
13083 p += 4;
13084 bfd_put_32 (htab->glink->owner, LD_R12_0R11, p);
13085 p += 4;
13086 bfd_put_32 (htab->glink->owner, SRDI_R0_R0_2, p);
13087 p += 4;
13088 bfd_put_32 (htab->glink->owner, MTCTR_R12, p);
13089 p += 4;
13090 bfd_put_32 (htab->glink->owner, LD_R11_0R11 | 8, p);
13091 p += 4;
13092 }
13093 bfd_put_32 (htab->glink->owner, BCTR, p);
13094 p += 4;
13095 while (p - htab->glink->contents < GLINK_CALL_STUB_SIZE)
13096 {
13097 bfd_put_32 (htab->glink->owner, NOP, p);
13098 p += 4;
13099 }
13100
13101 /* Build the .glink lazy link call stubs. */
13102 indx = 0;
13103 while (p < htab->glink->contents + htab->glink->rawsize)
13104 {
13105 if (htab->opd_abi)
13106 {
13107 if (indx < 0x8000)
13108 {
13109 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
13110 p += 4;
13111 }
13112 else
13113 {
13114 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
13115 p += 4;
13116 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx),
13117 p);
13118 p += 4;
13119 }
13120 }
13121 bfd_put_32 (htab->glink->owner,
13122 B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p);
13123 indx++;
13124 p += 4;
13125 }
13126
13127 /* Build .glink global entry stubs. */
13128 if (htab->glink->size > htab->glink->rawsize)
13129 elf_link_hash_traverse (&htab->elf, build_global_entry_stubs, info);
13130 }
13131
13132 if (htab->brlt != NULL && htab->brlt->size != 0)
13133 {
13134 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
13135 htab->brlt->size);
13136 if (htab->brlt->contents == NULL)
13137 return FALSE;
13138 }
13139 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
13140 {
13141 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
13142 htab->relbrlt->size);
13143 if (htab->relbrlt->contents == NULL)
13144 return FALSE;
13145 }
13146
13147 /* Build the stubs as directed by the stub hash table. */
13148 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
13149
13150 for (group = htab->group; group != NULL; group = group->next)
13151 if (group->needs_save_res)
13152 {
13153 stub_sec = group->stub_sec;
13154 memcpy (stub_sec->contents + stub_sec->size, htab->sfpr->contents,
13155 htab->sfpr->size);
13156 if (htab->params->emit_stub_syms)
13157 {
13158 unsigned int i;
13159
13160 for (i = 0; i < ARRAY_SIZE (save_res_funcs); i++)
13161 if (!sfpr_define (info, &save_res_funcs[i], stub_sec))
13162 return FALSE;
13163 }
13164 stub_sec->size += htab->sfpr->size;
13165 }
13166
13167 if (htab->relbrlt != NULL)
13168 htab->relbrlt->reloc_count = 0;
13169
13170 if (htab->params->plt_stub_align != 0)
13171 for (stub_sec = htab->params->stub_bfd->sections;
13172 stub_sec != NULL;
13173 stub_sec = stub_sec->next)
13174 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
13175 stub_sec->size = ((stub_sec->size
13176 + (1 << htab->params->plt_stub_align) - 1)
13177 & -(1 << htab->params->plt_stub_align));
13178
13179 for (stub_sec = htab->params->stub_bfd->sections;
13180 stub_sec != NULL;
13181 stub_sec = stub_sec->next)
13182 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
13183 {
13184 stub_sec_count += 1;
13185 if (stub_sec->rawsize != stub_sec->size
13186 && (htab->stub_iteration <= STUB_SHRINK_ITER
13187 || stub_sec->rawsize < stub_sec->size))
13188 break;
13189 }
13190
13191 /* Note that the glink_eh_frame check here is not only testing that
13192 the generated size matched the calculated size but also that
13193 bfd_elf_discard_info didn't make any changes to the section. */
13194 if (stub_sec != NULL
13195 || (htab->glink_eh_frame != NULL
13196 && htab->glink_eh_frame->rawsize != htab->glink_eh_frame->size))
13197 {
13198 htab->stub_error = TRUE;
13199 info->callbacks->einfo (_("%P: stubs don't match calculated size\n"));
13200 }
13201
13202 if (htab->stub_error)
13203 return FALSE;
13204
13205 if (stats != NULL)
13206 {
13207 *stats = bfd_malloc (500);
13208 if (*stats == NULL)
13209 return FALSE;
13210
13211 sprintf (*stats, _("linker stubs in %u group%s\n"
13212 " branch %lu\n"
13213 " toc adjust %lu\n"
13214 " long branch %lu\n"
13215 " long toc adj %lu\n"
13216 " plt call %lu\n"
13217 " plt call toc %lu\n"
13218 " global entry %lu"),
13219 stub_sec_count,
13220 stub_sec_count == 1 ? "" : "s",
13221 htab->stub_count[ppc_stub_long_branch - 1],
13222 htab->stub_count[ppc_stub_long_branch_r2off - 1],
13223 htab->stub_count[ppc_stub_plt_branch - 1],
13224 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
13225 htab->stub_count[ppc_stub_plt_call - 1],
13226 htab->stub_count[ppc_stub_plt_call_r2save - 1],
13227 htab->stub_count[ppc_stub_global_entry - 1]);
13228 }
13229 return TRUE;
13230 }
13231
13232 /* This function undoes the changes made by add_symbol_adjust. */
13233
13234 static bfd_boolean
13235 undo_symbol_twiddle (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
13236 {
13237 struct ppc_link_hash_entry *eh;
13238
13239 if (h->root.type == bfd_link_hash_indirect)
13240 return TRUE;
13241
13242 eh = (struct ppc_link_hash_entry *) h;
13243 if (eh->elf.root.type != bfd_link_hash_undefweak || !eh->was_undefined)
13244 return TRUE;
13245
13246 eh->elf.root.type = bfd_link_hash_undefined;
13247 return TRUE;
13248 }
13249
13250 void
13251 ppc64_elf_restore_symbols (struct bfd_link_info *info)
13252 {
13253 struct ppc_link_hash_table *htab = ppc_hash_table (info);
13254
13255 if (htab != NULL)
13256 elf_link_hash_traverse (&htab->elf, undo_symbol_twiddle, info);
13257 }
13258
13259 /* What to do when ld finds relocations against symbols defined in
13260 discarded sections. */
13261
13262 static unsigned int
13263 ppc64_elf_action_discarded (asection *sec)
13264 {
13265 if (strcmp (".opd", sec->name) == 0)
13266 return 0;
13267
13268 if (strcmp (".toc", sec->name) == 0)
13269 return 0;
13270
13271 if (strcmp (".toc1", sec->name) == 0)
13272 return 0;
13273
13274 return _bfd_elf_default_action_discarded (sec);
13275 }
13276
13277 /* The RELOCATE_SECTION function is called by the ELF backend linker
13278 to handle the relocations for a section.
13279
13280 The relocs are always passed as Rela structures; if the section
13281 actually uses Rel structures, the r_addend field will always be
13282 zero.
13283
13284 This function is responsible for adjust the section contents as
13285 necessary, and (if using Rela relocs and generating a
13286 relocatable output file) adjusting the reloc addend as
13287 necessary.
13288
13289 This function does not have to worry about setting the reloc
13290 address or the reloc symbol index.
13291
13292 LOCAL_SYMS is a pointer to the swapped in local symbols.
13293
13294 LOCAL_SECTIONS is an array giving the section in the input file
13295 corresponding to the st_shndx field of each local symbol.
13296
13297 The global hash table entry for the global symbols can be found
13298 via elf_sym_hashes (input_bfd).
13299
13300 When generating relocatable output, this function must handle
13301 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
13302 going to be the section symbol corresponding to the output
13303 section, which means that the addend must be adjusted
13304 accordingly. */
13305
13306 static bfd_boolean
13307 ppc64_elf_relocate_section (bfd *output_bfd,
13308 struct bfd_link_info *info,
13309 bfd *input_bfd,
13310 asection *input_section,
13311 bfd_byte *contents,
13312 Elf_Internal_Rela *relocs,
13313 Elf_Internal_Sym *local_syms,
13314 asection **local_sections)
13315 {
13316 struct ppc_link_hash_table *htab;
13317 Elf_Internal_Shdr *symtab_hdr;
13318 struct elf_link_hash_entry **sym_hashes;
13319 Elf_Internal_Rela *rel;
13320 Elf_Internal_Rela *wrel;
13321 Elf_Internal_Rela *relend;
13322 Elf_Internal_Rela outrel;
13323 bfd_byte *loc;
13324 struct got_entry **local_got_ents;
13325 bfd_vma TOCstart;
13326 bfd_boolean ret = TRUE;
13327 bfd_boolean is_opd;
13328 /* Assume 'at' branch hints. */
13329 bfd_boolean is_isa_v2 = TRUE;
13330 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
13331
13332 /* Initialize howto table if needed. */
13333 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
13334 ppc_howto_init ();
13335
13336 htab = ppc_hash_table (info);
13337 if (htab == NULL)
13338 return FALSE;
13339
13340 /* Don't relocate stub sections. */
13341 if (input_section->owner == htab->params->stub_bfd)
13342 return TRUE;
13343
13344 BFD_ASSERT (is_ppc64_elf (input_bfd));
13345
13346 local_got_ents = elf_local_got_ents (input_bfd);
13347 TOCstart = elf_gp (output_bfd);
13348 symtab_hdr = &elf_symtab_hdr (input_bfd);
13349 sym_hashes = elf_sym_hashes (input_bfd);
13350 is_opd = ppc64_elf_section_data (input_section)->sec_type == sec_opd;
13351
13352 rel = wrel = relocs;
13353 relend = relocs + input_section->reloc_count;
13354 for (; rel < relend; wrel++, rel++)
13355 {
13356 enum elf_ppc64_reloc_type r_type;
13357 bfd_vma addend;
13358 bfd_reloc_status_type r;
13359 Elf_Internal_Sym *sym;
13360 asection *sec;
13361 struct elf_link_hash_entry *h_elf;
13362 struct ppc_link_hash_entry *h;
13363 struct ppc_link_hash_entry *fdh;
13364 const char *sym_name;
13365 unsigned long r_symndx, toc_symndx;
13366 bfd_vma toc_addend;
13367 unsigned char tls_mask, tls_gd, tls_type;
13368 unsigned char sym_type;
13369 bfd_vma relocation;
13370 bfd_boolean unresolved_reloc;
13371 bfd_boolean warned;
13372 enum { DEST_NORMAL, DEST_OPD, DEST_STUB } reloc_dest;
13373 unsigned int insn;
13374 unsigned int mask;
13375 struct ppc_stub_hash_entry *stub_entry;
13376 bfd_vma max_br_offset;
13377 bfd_vma from;
13378 Elf_Internal_Rela orig_rel;
13379 reloc_howto_type *howto;
13380 struct reloc_howto_struct alt_howto;
13381
13382 again:
13383 orig_rel = *rel;
13384
13385 r_type = ELF64_R_TYPE (rel->r_info);
13386 r_symndx = ELF64_R_SYM (rel->r_info);
13387
13388 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
13389 symbol of the previous ADDR64 reloc. The symbol gives us the
13390 proper TOC base to use. */
13391 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
13392 && wrel != relocs
13393 && ELF64_R_TYPE (wrel[-1].r_info) == R_PPC64_ADDR64
13394 && is_opd)
13395 r_symndx = ELF64_R_SYM (wrel[-1].r_info);
13396
13397 sym = NULL;
13398 sec = NULL;
13399 h_elf = NULL;
13400 sym_name = NULL;
13401 unresolved_reloc = FALSE;
13402 warned = FALSE;
13403
13404 if (r_symndx < symtab_hdr->sh_info)
13405 {
13406 /* It's a local symbol. */
13407 struct _opd_sec_data *opd;
13408
13409 sym = local_syms + r_symndx;
13410 sec = local_sections[r_symndx];
13411 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
13412 sym_type = ELF64_ST_TYPE (sym->st_info);
13413 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
13414 opd = get_opd_info (sec);
13415 if (opd != NULL && opd->adjust != NULL)
13416 {
13417 long adjust = opd->adjust[OPD_NDX (sym->st_value
13418 + rel->r_addend)];
13419 if (adjust == -1)
13420 relocation = 0;
13421 else
13422 {
13423 /* If this is a relocation against the opd section sym
13424 and we have edited .opd, adjust the reloc addend so
13425 that ld -r and ld --emit-relocs output is correct.
13426 If it is a reloc against some other .opd symbol,
13427 then the symbol value will be adjusted later. */
13428 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
13429 rel->r_addend += adjust;
13430 else
13431 relocation += adjust;
13432 }
13433 }
13434 }
13435 else
13436 {
13437 bfd_boolean ignored;
13438
13439 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
13440 r_symndx, symtab_hdr, sym_hashes,
13441 h_elf, sec, relocation,
13442 unresolved_reloc, warned, ignored);
13443 sym_name = h_elf->root.root.string;
13444 sym_type = h_elf->type;
13445 if (sec != NULL
13446 && sec->owner == output_bfd
13447 && strcmp (sec->name, ".opd") == 0)
13448 {
13449 /* This is a symbol defined in a linker script. All
13450 such are defined in output sections, even those
13451 defined by simple assignment from a symbol defined in
13452 an input section. Transfer the symbol to an
13453 appropriate input .opd section, so that a branch to
13454 this symbol will be mapped to the location specified
13455 by the opd entry. */
13456 struct bfd_link_order *lo;
13457 for (lo = sec->map_head.link_order; lo != NULL; lo = lo->next)
13458 if (lo->type == bfd_indirect_link_order)
13459 {
13460 asection *isec = lo->u.indirect.section;
13461 if (h_elf->root.u.def.value >= isec->output_offset
13462 && h_elf->root.u.def.value < (isec->output_offset
13463 + isec->size))
13464 {
13465 h_elf->root.u.def.value -= isec->output_offset;
13466 h_elf->root.u.def.section = isec;
13467 sec = isec;
13468 break;
13469 }
13470 }
13471 }
13472 }
13473 h = (struct ppc_link_hash_entry *) h_elf;
13474
13475 if (sec != NULL && discarded_section (sec))
13476 {
13477 _bfd_clear_contents (ppc64_elf_howto_table[r_type],
13478 input_bfd, input_section,
13479 contents + rel->r_offset);
13480 wrel->r_offset = rel->r_offset;
13481 wrel->r_info = 0;
13482 wrel->r_addend = 0;
13483
13484 /* For ld -r, remove relocations in debug sections against
13485 sections defined in discarded sections. Not done for
13486 non-debug to preserve relocs in .eh_frame which the
13487 eh_frame editing code expects to be present. */
13488 if (bfd_link_relocatable (info)
13489 && (input_section->flags & SEC_DEBUGGING))
13490 wrel--;
13491
13492 continue;
13493 }
13494
13495 if (bfd_link_relocatable (info))
13496 goto copy_reloc;
13497
13498 if (h != NULL && &h->elf == htab->elf.hgot)
13499 {
13500 relocation = TOCstart + htab->sec_info[input_section->id].toc_off;
13501 sec = bfd_abs_section_ptr;
13502 unresolved_reloc = FALSE;
13503 }
13504
13505 /* TLS optimizations. Replace instruction sequences and relocs
13506 based on information we collected in tls_optimize. We edit
13507 RELOCS so that --emit-relocs will output something sensible
13508 for the final instruction stream. */
13509 tls_mask = 0;
13510 tls_gd = 0;
13511 toc_symndx = 0;
13512 if (h != NULL)
13513 tls_mask = h->tls_mask;
13514 else if (local_got_ents != NULL)
13515 {
13516 struct plt_entry **local_plt = (struct plt_entry **)
13517 (local_got_ents + symtab_hdr->sh_info);
13518 unsigned char *lgot_masks = (unsigned char *)
13519 (local_plt + symtab_hdr->sh_info);
13520 tls_mask = lgot_masks[r_symndx];
13521 }
13522 if (tls_mask == 0
13523 && (r_type == R_PPC64_TLS
13524 || r_type == R_PPC64_TLSGD
13525 || r_type == R_PPC64_TLSLD))
13526 {
13527 /* Check for toc tls entries. */
13528 unsigned char *toc_tls;
13529
13530 if (!get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
13531 &local_syms, rel, input_bfd))
13532 return FALSE;
13533
13534 if (toc_tls)
13535 tls_mask = *toc_tls;
13536 }
13537
13538 /* Check that tls relocs are used with tls syms, and non-tls
13539 relocs are used with non-tls syms. */
13540 if (r_symndx != STN_UNDEF
13541 && r_type != R_PPC64_NONE
13542 && (h == NULL
13543 || h->elf.root.type == bfd_link_hash_defined
13544 || h->elf.root.type == bfd_link_hash_defweak)
13545 && (IS_PPC64_TLS_RELOC (r_type)
13546 != (sym_type == STT_TLS
13547 || (sym_type == STT_SECTION
13548 && (sec->flags & SEC_THREAD_LOCAL) != 0))))
13549 {
13550 if (tls_mask != 0
13551 && (r_type == R_PPC64_TLS
13552 || r_type == R_PPC64_TLSGD
13553 || r_type == R_PPC64_TLSLD))
13554 /* R_PPC64_TLS is OK against a symbol in the TOC. */
13555 ;
13556 else
13557 info->callbacks->einfo
13558 (!IS_PPC64_TLS_RELOC (r_type)
13559 ? _("%P: %H: %s used with TLS symbol `%T'\n")
13560 : _("%P: %H: %s used with non-TLS symbol `%T'\n"),
13561 input_bfd, input_section, rel->r_offset,
13562 ppc64_elf_howto_table[r_type]->name,
13563 sym_name);
13564 }
13565
13566 /* Ensure reloc mapping code below stays sane. */
13567 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
13568 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
13569 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
13570 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
13571 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
13572 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
13573 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
13574 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
13575 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
13576 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
13577 abort ();
13578
13579 switch (r_type)
13580 {
13581 default:
13582 break;
13583
13584 case R_PPC64_LO_DS_OPT:
13585 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
13586 if ((insn & (0x3f << 26)) != 58u << 26)
13587 abort ();
13588 insn += (14u << 26) - (58u << 26);
13589 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
13590 r_type = R_PPC64_TOC16_LO;
13591 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13592 break;
13593
13594 case R_PPC64_TOC16:
13595 case R_PPC64_TOC16_LO:
13596 case R_PPC64_TOC16_DS:
13597 case R_PPC64_TOC16_LO_DS:
13598 {
13599 /* Check for toc tls entries. */
13600 unsigned char *toc_tls;
13601 int retval;
13602
13603 retval = get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
13604 &local_syms, rel, input_bfd);
13605 if (retval == 0)
13606 return FALSE;
13607
13608 if (toc_tls)
13609 {
13610 tls_mask = *toc_tls;
13611 if (r_type == R_PPC64_TOC16_DS
13612 || r_type == R_PPC64_TOC16_LO_DS)
13613 {
13614 if (tls_mask != 0
13615 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
13616 goto toctprel;
13617 }
13618 else
13619 {
13620 /* If we found a GD reloc pair, then we might be
13621 doing a GD->IE transition. */
13622 if (retval == 2)
13623 {
13624 tls_gd = TLS_TPRELGD;
13625 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13626 goto tls_ldgd_opt;
13627 }
13628 else if (retval == 3)
13629 {
13630 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13631 goto tls_ldgd_opt;
13632 }
13633 }
13634 }
13635 }
13636 break;
13637
13638 case R_PPC64_GOT_TPREL16_HI:
13639 case R_PPC64_GOT_TPREL16_HA:
13640 if (tls_mask != 0
13641 && (tls_mask & TLS_TPREL) == 0)
13642 {
13643 rel->r_offset -= d_offset;
13644 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
13645 r_type = R_PPC64_NONE;
13646 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13647 }
13648 break;
13649
13650 case R_PPC64_GOT_TPREL16_DS:
13651 case R_PPC64_GOT_TPREL16_LO_DS:
13652 if (tls_mask != 0
13653 && (tls_mask & TLS_TPREL) == 0)
13654 {
13655 toctprel:
13656 insn = bfd_get_32 (output_bfd,
13657 contents + rel->r_offset - d_offset);
13658 insn &= 31 << 21;
13659 insn |= 0x3c0d0000; /* addis 0,13,0 */
13660 bfd_put_32 (output_bfd, insn,
13661 contents + rel->r_offset - d_offset);
13662 r_type = R_PPC64_TPREL16_HA;
13663 if (toc_symndx != 0)
13664 {
13665 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
13666 rel->r_addend = toc_addend;
13667 /* We changed the symbol. Start over in order to
13668 get h, sym, sec etc. right. */
13669 goto again;
13670 }
13671 else
13672 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13673 }
13674 break;
13675
13676 case R_PPC64_TLS:
13677 if (tls_mask != 0
13678 && (tls_mask & TLS_TPREL) == 0)
13679 {
13680 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
13681 insn = _bfd_elf_ppc_at_tls_transform (insn, 13);
13682 if (insn == 0)
13683 abort ();
13684 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
13685 /* Was PPC64_TLS which sits on insn boundary, now
13686 PPC64_TPREL16_LO which is at low-order half-word. */
13687 rel->r_offset += d_offset;
13688 r_type = R_PPC64_TPREL16_LO;
13689 if (toc_symndx != 0)
13690 {
13691 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
13692 rel->r_addend = toc_addend;
13693 /* We changed the symbol. Start over in order to
13694 get h, sym, sec etc. right. */
13695 goto again;
13696 }
13697 else
13698 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13699 }
13700 break;
13701
13702 case R_PPC64_GOT_TLSGD16_HI:
13703 case R_PPC64_GOT_TLSGD16_HA:
13704 tls_gd = TLS_TPRELGD;
13705 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13706 goto tls_gdld_hi;
13707 break;
13708
13709 case R_PPC64_GOT_TLSLD16_HI:
13710 case R_PPC64_GOT_TLSLD16_HA:
13711 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13712 {
13713 tls_gdld_hi:
13714 if ((tls_mask & tls_gd) != 0)
13715 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
13716 + R_PPC64_GOT_TPREL16_DS);
13717 else
13718 {
13719 rel->r_offset -= d_offset;
13720 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
13721 r_type = R_PPC64_NONE;
13722 }
13723 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13724 }
13725 break;
13726
13727 case R_PPC64_GOT_TLSGD16:
13728 case R_PPC64_GOT_TLSGD16_LO:
13729 tls_gd = TLS_TPRELGD;
13730 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13731 goto tls_ldgd_opt;
13732 break;
13733
13734 case R_PPC64_GOT_TLSLD16:
13735 case R_PPC64_GOT_TLSLD16_LO:
13736 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13737 {
13738 unsigned int insn1, insn2, insn3;
13739 bfd_vma offset;
13740
13741 tls_ldgd_opt:
13742 offset = (bfd_vma) -1;
13743 /* If not using the newer R_PPC64_TLSGD/LD to mark
13744 __tls_get_addr calls, we must trust that the call
13745 stays with its arg setup insns, ie. that the next
13746 reloc is the __tls_get_addr call associated with
13747 the current reloc. Edit both insns. */
13748 if (input_section->has_tls_get_addr_call
13749 && rel + 1 < relend
13750 && branch_reloc_hash_match (input_bfd, rel + 1,
13751 htab->tls_get_addr,
13752 htab->tls_get_addr_fd))
13753 offset = rel[1].r_offset;
13754 /* We read the low GOT_TLS (or TOC16) insn because we
13755 need to keep the destination reg. It may be
13756 something other than the usual r3, and moved to r3
13757 before the call by intervening code. */
13758 insn1 = bfd_get_32 (output_bfd,
13759 contents + rel->r_offset - d_offset);
13760 if ((tls_mask & tls_gd) != 0)
13761 {
13762 /* IE */
13763 insn1 &= (0x1f << 21) | (0x1f << 16);
13764 insn1 |= 58 << 26; /* ld */
13765 insn2 = 0x7c636a14; /* add 3,3,13 */
13766 if (offset != (bfd_vma) -1)
13767 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13768 if ((tls_mask & TLS_EXPLICIT) == 0)
13769 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
13770 + R_PPC64_GOT_TPREL16_DS);
13771 else
13772 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
13773 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13774 }
13775 else
13776 {
13777 /* LE */
13778 insn1 &= 0x1f << 21;
13779 insn1 |= 0x3c0d0000; /* addis r,13,0 */
13780 insn2 = 0x38630000; /* addi 3,3,0 */
13781 if (tls_gd == 0)
13782 {
13783 /* Was an LD reloc. */
13784 if (toc_symndx)
13785 sec = local_sections[toc_symndx];
13786 for (r_symndx = 0;
13787 r_symndx < symtab_hdr->sh_info;
13788 r_symndx++)
13789 if (local_sections[r_symndx] == sec)
13790 break;
13791 if (r_symndx >= symtab_hdr->sh_info)
13792 r_symndx = STN_UNDEF;
13793 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
13794 if (r_symndx != STN_UNDEF)
13795 rel->r_addend -= (local_syms[r_symndx].st_value
13796 + sec->output_offset
13797 + sec->output_section->vma);
13798 }
13799 else if (toc_symndx != 0)
13800 {
13801 r_symndx = toc_symndx;
13802 rel->r_addend = toc_addend;
13803 }
13804 r_type = R_PPC64_TPREL16_HA;
13805 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13806 if (offset != (bfd_vma) -1)
13807 {
13808 rel[1].r_info = ELF64_R_INFO (r_symndx,
13809 R_PPC64_TPREL16_LO);
13810 rel[1].r_offset = offset + d_offset;
13811 rel[1].r_addend = rel->r_addend;
13812 }
13813 }
13814 bfd_put_32 (output_bfd, insn1,
13815 contents + rel->r_offset - d_offset);
13816 if (offset != (bfd_vma) -1)
13817 {
13818 insn3 = bfd_get_32 (output_bfd,
13819 contents + offset + 4);
13820 if (insn3 == NOP
13821 || insn3 == CROR_151515 || insn3 == CROR_313131)
13822 {
13823 rel[1].r_offset += 4;
13824 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
13825 insn2 = NOP;
13826 }
13827 bfd_put_32 (output_bfd, insn2, contents + offset);
13828 }
13829 if ((tls_mask & tls_gd) == 0
13830 && (tls_gd == 0 || toc_symndx != 0))
13831 {
13832 /* We changed the symbol. Start over in order
13833 to get h, sym, sec etc. right. */
13834 goto again;
13835 }
13836 }
13837 break;
13838
13839 case R_PPC64_TLSGD:
13840 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13841 {
13842 unsigned int insn2, insn3;
13843 bfd_vma offset = rel->r_offset;
13844
13845 if ((tls_mask & TLS_TPRELGD) != 0)
13846 {
13847 /* IE */
13848 r_type = R_PPC64_NONE;
13849 insn2 = 0x7c636a14; /* add 3,3,13 */
13850 }
13851 else
13852 {
13853 /* LE */
13854 if (toc_symndx != 0)
13855 {
13856 r_symndx = toc_symndx;
13857 rel->r_addend = toc_addend;
13858 }
13859 r_type = R_PPC64_TPREL16_LO;
13860 rel->r_offset = offset + d_offset;
13861 insn2 = 0x38630000; /* addi 3,3,0 */
13862 }
13863 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13864 /* Zap the reloc on the _tls_get_addr call too. */
13865 BFD_ASSERT (offset == rel[1].r_offset);
13866 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13867 insn3 = bfd_get_32 (output_bfd,
13868 contents + offset + 4);
13869 if (insn3 == NOP
13870 || insn3 == CROR_151515 || insn3 == CROR_313131)
13871 {
13872 rel->r_offset += 4;
13873 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
13874 insn2 = NOP;
13875 }
13876 bfd_put_32 (output_bfd, insn2, contents + offset);
13877 if ((tls_mask & TLS_TPRELGD) == 0 && toc_symndx != 0)
13878 goto again;
13879 }
13880 break;
13881
13882 case R_PPC64_TLSLD:
13883 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13884 {
13885 unsigned int insn2, insn3;
13886 bfd_vma offset = rel->r_offset;
13887
13888 if (toc_symndx)
13889 sec = local_sections[toc_symndx];
13890 for (r_symndx = 0;
13891 r_symndx < symtab_hdr->sh_info;
13892 r_symndx++)
13893 if (local_sections[r_symndx] == sec)
13894 break;
13895 if (r_symndx >= symtab_hdr->sh_info)
13896 r_symndx = STN_UNDEF;
13897 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
13898 if (r_symndx != STN_UNDEF)
13899 rel->r_addend -= (local_syms[r_symndx].st_value
13900 + sec->output_offset
13901 + sec->output_section->vma);
13902
13903 r_type = R_PPC64_TPREL16_LO;
13904 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13905 rel->r_offset = offset + d_offset;
13906 /* Zap the reloc on the _tls_get_addr call too. */
13907 BFD_ASSERT (offset == rel[1].r_offset);
13908 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13909 insn2 = 0x38630000; /* addi 3,3,0 */
13910 insn3 = bfd_get_32 (output_bfd,
13911 contents + offset + 4);
13912 if (insn3 == NOP
13913 || insn3 == CROR_151515 || insn3 == CROR_313131)
13914 {
13915 rel->r_offset += 4;
13916 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
13917 insn2 = NOP;
13918 }
13919 bfd_put_32 (output_bfd, insn2, contents + offset);
13920 goto again;
13921 }
13922 break;
13923
13924 case R_PPC64_DTPMOD64:
13925 if (rel + 1 < relend
13926 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
13927 && rel[1].r_offset == rel->r_offset + 8)
13928 {
13929 if ((tls_mask & TLS_GD) == 0)
13930 {
13931 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
13932 if ((tls_mask & TLS_TPRELGD) != 0)
13933 r_type = R_PPC64_TPREL64;
13934 else
13935 {
13936 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
13937 r_type = R_PPC64_NONE;
13938 }
13939 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13940 }
13941 }
13942 else
13943 {
13944 if ((tls_mask & TLS_LD) == 0)
13945 {
13946 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
13947 r_type = R_PPC64_NONE;
13948 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13949 }
13950 }
13951 break;
13952
13953 case R_PPC64_TPREL64:
13954 if ((tls_mask & TLS_TPREL) == 0)
13955 {
13956 r_type = R_PPC64_NONE;
13957 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13958 }
13959 break;
13960
13961 case R_PPC64_ENTRY:
13962 relocation = TOCstart + htab->sec_info[input_section->id].toc_off;
13963 if (!bfd_link_pic (info)
13964 && !info->traditional_format
13965 && relocation + 0x80008000 <= 0xffffffff)
13966 {
13967 unsigned int insn1, insn2;
13968
13969 insn1 = bfd_get_32 (input_bfd, contents + rel->r_offset);
13970 insn2 = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
13971 if ((insn1 & ~0xfffc) == LD_R2_0R12
13972 && insn2 == ADD_R2_R2_R12)
13973 {
13974 bfd_put_32 (output_bfd,
13975 LIS_R2 + PPC_HA (relocation),
13976 contents + rel->r_offset);
13977 bfd_put_32 (output_bfd,
13978 ADDI_R2_R2 + PPC_LO (relocation),
13979 contents + rel->r_offset + 4);
13980 }
13981 }
13982 else
13983 {
13984 relocation -= (rel->r_offset
13985 + input_section->output_offset
13986 + input_section->output_section->vma);
13987 if (relocation + 0x80008000 <= 0xffffffff)
13988 {
13989 unsigned int insn1, insn2;
13990
13991 insn1 = bfd_get_32 (input_bfd, contents + rel->r_offset);
13992 insn2 = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
13993 if ((insn1 & ~0xfffc) == LD_R2_0R12
13994 && insn2 == ADD_R2_R2_R12)
13995 {
13996 bfd_put_32 (output_bfd,
13997 ADDIS_R2_R12 + PPC_HA (relocation),
13998 contents + rel->r_offset);
13999 bfd_put_32 (output_bfd,
14000 ADDI_R2_R2 + PPC_LO (relocation),
14001 contents + rel->r_offset + 4);
14002 }
14003 }
14004 }
14005 break;
14006
14007 case R_PPC64_REL16_HA:
14008 /* If we are generating a non-PIC executable, edit
14009 . 0: addis 2,12,.TOC.-0b@ha
14010 . addi 2,2,.TOC.-0b@l
14011 used by ELFv2 global entry points to set up r2, to
14012 . lis 2,.TOC.@ha
14013 . addi 2,2,.TOC.@l
14014 if .TOC. is in range. */
14015 if (!bfd_link_pic (info)
14016 && !info->traditional_format
14017 && !htab->opd_abi
14018 && rel->r_addend == d_offset
14019 && h != NULL && &h->elf == htab->elf.hgot
14020 && rel + 1 < relend
14021 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_REL16_LO)
14022 && rel[1].r_offset == rel->r_offset + 4
14023 && rel[1].r_addend == rel->r_addend + 4
14024 && relocation + 0x80008000 <= 0xffffffff)
14025 {
14026 unsigned int insn1, insn2;
14027 bfd_vma offset = rel->r_offset - d_offset;
14028 insn1 = bfd_get_32 (output_bfd, contents + offset);
14029 insn2 = bfd_get_32 (output_bfd, contents + offset + 4);
14030 if ((insn1 & 0xffff0000) == ADDIS_R2_R12
14031 && (insn2 & 0xffff0000) == ADDI_R2_R2)
14032 {
14033 r_type = R_PPC64_ADDR16_HA;
14034 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14035 rel->r_addend -= d_offset;
14036 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_ADDR16_LO);
14037 rel[1].r_addend -= d_offset + 4;
14038 bfd_put_32 (output_bfd, LIS_R2, contents + offset);
14039 }
14040 }
14041 break;
14042 }
14043
14044 /* Handle other relocations that tweak non-addend part of insn. */
14045 insn = 0;
14046 max_br_offset = 1 << 25;
14047 addend = rel->r_addend;
14048 reloc_dest = DEST_NORMAL;
14049 switch (r_type)
14050 {
14051 default:
14052 break;
14053
14054 case R_PPC64_TOCSAVE:
14055 if (relocation + addend == (rel->r_offset
14056 + input_section->output_offset
14057 + input_section->output_section->vma)
14058 && tocsave_find (htab, NO_INSERT,
14059 &local_syms, rel, input_bfd))
14060 {
14061 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
14062 if (insn == NOP
14063 || insn == CROR_151515 || insn == CROR_313131)
14064 bfd_put_32 (input_bfd,
14065 STD_R2_0R1 + STK_TOC (htab),
14066 contents + rel->r_offset);
14067 }
14068 break;
14069
14070 /* Branch taken prediction relocations. */
14071 case R_PPC64_ADDR14_BRTAKEN:
14072 case R_PPC64_REL14_BRTAKEN:
14073 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
14074 /* Fall thru. */
14075
14076 /* Branch not taken prediction relocations. */
14077 case R_PPC64_ADDR14_BRNTAKEN:
14078 case R_PPC64_REL14_BRNTAKEN:
14079 insn |= bfd_get_32 (output_bfd,
14080 contents + rel->r_offset) & ~(0x01 << 21);
14081 /* Fall thru. */
14082
14083 case R_PPC64_REL14:
14084 max_br_offset = 1 << 15;
14085 /* Fall thru. */
14086
14087 case R_PPC64_REL24:
14088 /* Calls to functions with a different TOC, such as calls to
14089 shared objects, need to alter the TOC pointer. This is
14090 done using a linkage stub. A REL24 branching to these
14091 linkage stubs needs to be followed by a nop, as the nop
14092 will be replaced with an instruction to restore the TOC
14093 base pointer. */
14094 fdh = h;
14095 if (h != NULL
14096 && h->oh != NULL
14097 && h->oh->is_func_descriptor)
14098 fdh = ppc_follow_link (h->oh);
14099 stub_entry = ppc_get_stub_entry (input_section, sec, fdh, &orig_rel,
14100 htab);
14101 if (stub_entry != NULL
14102 && (stub_entry->stub_type == ppc_stub_plt_call
14103 || stub_entry->stub_type == ppc_stub_plt_call_r2save
14104 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
14105 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
14106 {
14107 bfd_boolean can_plt_call = FALSE;
14108
14109 /* All of these stubs will modify r2, so there must be a
14110 branch and link followed by a nop. The nop is
14111 replaced by an insn to restore r2. */
14112 if (rel->r_offset + 8 <= input_section->size)
14113 {
14114 unsigned long br;
14115
14116 br = bfd_get_32 (input_bfd,
14117 contents + rel->r_offset);
14118 if ((br & 1) != 0)
14119 {
14120 unsigned long nop;
14121
14122 nop = bfd_get_32 (input_bfd,
14123 contents + rel->r_offset + 4);
14124 if (nop == NOP
14125 || nop == CROR_151515 || nop == CROR_313131)
14126 {
14127 if (h != NULL
14128 && (h == htab->tls_get_addr_fd
14129 || h == htab->tls_get_addr)
14130 && htab->params->tls_get_addr_opt)
14131 {
14132 /* Special stub used, leave nop alone. */
14133 }
14134 else
14135 bfd_put_32 (input_bfd,
14136 LD_R2_0R1 + STK_TOC (htab),
14137 contents + rel->r_offset + 4);
14138 can_plt_call = TRUE;
14139 }
14140 }
14141 }
14142
14143 if (!can_plt_call && h != NULL)
14144 {
14145 const char *name = h->elf.root.root.string;
14146
14147 if (*name == '.')
14148 ++name;
14149
14150 if (strncmp (name, "__libc_start_main", 17) == 0
14151 && (name[17] == 0 || name[17] == '@'))
14152 {
14153 /* Allow crt1 branch to go via a toc adjusting
14154 stub. Other calls that never return could do
14155 the same, if we could detect such. */
14156 can_plt_call = TRUE;
14157 }
14158 }
14159
14160 if (!can_plt_call)
14161 {
14162 /* g++ as of 20130507 emits self-calls without a
14163 following nop. This is arguably wrong since we
14164 have conflicting information. On the one hand a
14165 global symbol and on the other a local call
14166 sequence, but don't error for this special case.
14167 It isn't possible to cheaply verify we have
14168 exactly such a call. Allow all calls to the same
14169 section. */
14170 asection *code_sec = sec;
14171
14172 if (get_opd_info (sec) != NULL)
14173 {
14174 bfd_vma off = (relocation + addend
14175 - sec->output_section->vma
14176 - sec->output_offset);
14177
14178 opd_entry_value (sec, off, &code_sec, NULL, FALSE);
14179 }
14180 if (code_sec == input_section)
14181 can_plt_call = TRUE;
14182 }
14183
14184 if (!can_plt_call)
14185 {
14186 if (stub_entry->stub_type == ppc_stub_plt_call
14187 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14188 info->callbacks->einfo
14189 (_("%P: %H: call to `%T' lacks nop, can't restore toc; "
14190 "recompile with -fPIC\n"),
14191 input_bfd, input_section, rel->r_offset, sym_name);
14192 else
14193 info->callbacks->einfo
14194 (_("%P: %H: call to `%T' lacks nop, can't restore toc; "
14195 "(-mcmodel=small toc adjust stub)\n"),
14196 input_bfd, input_section, rel->r_offset, sym_name);
14197
14198 bfd_set_error (bfd_error_bad_value);
14199 ret = FALSE;
14200 }
14201
14202 if (can_plt_call
14203 && (stub_entry->stub_type == ppc_stub_plt_call
14204 || stub_entry->stub_type == ppc_stub_plt_call_r2save))
14205 unresolved_reloc = FALSE;
14206 }
14207
14208 if ((stub_entry == NULL
14209 || stub_entry->stub_type == ppc_stub_long_branch
14210 || stub_entry->stub_type == ppc_stub_plt_branch)
14211 && get_opd_info (sec) != NULL)
14212 {
14213 /* The branch destination is the value of the opd entry. */
14214 bfd_vma off = (relocation + addend
14215 - sec->output_section->vma
14216 - sec->output_offset);
14217 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL, FALSE);
14218 if (dest != (bfd_vma) -1)
14219 {
14220 relocation = dest;
14221 addend = 0;
14222 reloc_dest = DEST_OPD;
14223 }
14224 }
14225
14226 /* If the branch is out of reach we ought to have a long
14227 branch stub. */
14228 from = (rel->r_offset
14229 + input_section->output_offset
14230 + input_section->output_section->vma);
14231
14232 relocation += PPC64_LOCAL_ENTRY_OFFSET (fdh
14233 ? fdh->elf.other
14234 : sym->st_other);
14235
14236 if (stub_entry != NULL
14237 && (stub_entry->stub_type == ppc_stub_long_branch
14238 || stub_entry->stub_type == ppc_stub_plt_branch)
14239 && (r_type == R_PPC64_ADDR14_BRTAKEN
14240 || r_type == R_PPC64_ADDR14_BRNTAKEN
14241 || (relocation + addend - from + max_br_offset
14242 < 2 * max_br_offset)))
14243 /* Don't use the stub if this branch is in range. */
14244 stub_entry = NULL;
14245
14246 if (stub_entry != NULL)
14247 {
14248 /* Munge up the value and addend so that we call the stub
14249 rather than the procedure directly. */
14250 asection *stub_sec = stub_entry->group->stub_sec;
14251
14252 if (stub_entry->stub_type == ppc_stub_save_res)
14253 relocation += (stub_sec->output_offset
14254 + stub_sec->output_section->vma
14255 + stub_sec->size - htab->sfpr->size
14256 - htab->sfpr->output_offset
14257 - htab->sfpr->output_section->vma);
14258 else
14259 relocation = (stub_entry->stub_offset
14260 + stub_sec->output_offset
14261 + stub_sec->output_section->vma);
14262 addend = 0;
14263 reloc_dest = DEST_STUB;
14264
14265 if ((stub_entry->stub_type == ppc_stub_plt_call
14266 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14267 && (ALWAYS_EMIT_R2SAVE
14268 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14269 && rel + 1 < relend
14270 && rel[1].r_offset == rel->r_offset + 4
14271 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOCSAVE)
14272 relocation += 4;
14273 }
14274
14275 if (insn != 0)
14276 {
14277 if (is_isa_v2)
14278 {
14279 /* Set 'a' bit. This is 0b00010 in BO field for branch
14280 on CR(BI) insns (BO == 001at or 011at), and 0b01000
14281 for branch on CTR insns (BO == 1a00t or 1a01t). */
14282 if ((insn & (0x14 << 21)) == (0x04 << 21))
14283 insn |= 0x02 << 21;
14284 else if ((insn & (0x14 << 21)) == (0x10 << 21))
14285 insn |= 0x08 << 21;
14286 else
14287 break;
14288 }
14289 else
14290 {
14291 /* Invert 'y' bit if not the default. */
14292 if ((bfd_signed_vma) (relocation + addend - from) < 0)
14293 insn ^= 0x01 << 21;
14294 }
14295
14296 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
14297 }
14298
14299 /* NOP out calls to undefined weak functions.
14300 We can thus call a weak function without first
14301 checking whether the function is defined. */
14302 else if (h != NULL
14303 && h->elf.root.type == bfd_link_hash_undefweak
14304 && h->elf.dynindx == -1
14305 && r_type == R_PPC64_REL24
14306 && relocation == 0
14307 && addend == 0)
14308 {
14309 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
14310 goto copy_reloc;
14311 }
14312 break;
14313 }
14314
14315 /* Set `addend'. */
14316 tls_type = 0;
14317 switch (r_type)
14318 {
14319 default:
14320 info->callbacks->einfo
14321 (_("%P: %B: unknown relocation type %d for `%T'\n"),
14322 input_bfd, (int) r_type, sym_name);
14323
14324 bfd_set_error (bfd_error_bad_value);
14325 ret = FALSE;
14326 goto copy_reloc;
14327
14328 case R_PPC64_NONE:
14329 case R_PPC64_TLS:
14330 case R_PPC64_TLSGD:
14331 case R_PPC64_TLSLD:
14332 case R_PPC64_TOCSAVE:
14333 case R_PPC64_GNU_VTINHERIT:
14334 case R_PPC64_GNU_VTENTRY:
14335 case R_PPC64_ENTRY:
14336 goto copy_reloc;
14337
14338 /* GOT16 relocations. Like an ADDR16 using the symbol's
14339 address in the GOT as relocation value instead of the
14340 symbol's value itself. Also, create a GOT entry for the
14341 symbol and put the symbol value there. */
14342 case R_PPC64_GOT_TLSGD16:
14343 case R_PPC64_GOT_TLSGD16_LO:
14344 case R_PPC64_GOT_TLSGD16_HI:
14345 case R_PPC64_GOT_TLSGD16_HA:
14346 tls_type = TLS_TLS | TLS_GD;
14347 goto dogot;
14348
14349 case R_PPC64_GOT_TLSLD16:
14350 case R_PPC64_GOT_TLSLD16_LO:
14351 case R_PPC64_GOT_TLSLD16_HI:
14352 case R_PPC64_GOT_TLSLD16_HA:
14353 tls_type = TLS_TLS | TLS_LD;
14354 goto dogot;
14355
14356 case R_PPC64_GOT_TPREL16_DS:
14357 case R_PPC64_GOT_TPREL16_LO_DS:
14358 case R_PPC64_GOT_TPREL16_HI:
14359 case R_PPC64_GOT_TPREL16_HA:
14360 tls_type = TLS_TLS | TLS_TPREL;
14361 goto dogot;
14362
14363 case R_PPC64_GOT_DTPREL16_DS:
14364 case R_PPC64_GOT_DTPREL16_LO_DS:
14365 case R_PPC64_GOT_DTPREL16_HI:
14366 case R_PPC64_GOT_DTPREL16_HA:
14367 tls_type = TLS_TLS | TLS_DTPREL;
14368 goto dogot;
14369
14370 case R_PPC64_GOT16:
14371 case R_PPC64_GOT16_LO:
14372 case R_PPC64_GOT16_HI:
14373 case R_PPC64_GOT16_HA:
14374 case R_PPC64_GOT16_DS:
14375 case R_PPC64_GOT16_LO_DS:
14376 dogot:
14377 {
14378 /* Relocation is to the entry for this symbol in the global
14379 offset table. */
14380 asection *got;
14381 bfd_vma *offp;
14382 bfd_vma off;
14383 unsigned long indx = 0;
14384 struct got_entry *ent;
14385
14386 if (tls_type == (TLS_TLS | TLS_LD)
14387 && (h == NULL
14388 || !h->elf.def_dynamic))
14389 ent = ppc64_tlsld_got (input_bfd);
14390 else
14391 {
14392
14393 if (h != NULL)
14394 {
14395 bfd_boolean dyn = htab->elf.dynamic_sections_created;
14396 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, bfd_link_pic (info),
14397 &h->elf)
14398 || (bfd_link_pic (info)
14399 && SYMBOL_REFERENCES_LOCAL (info, &h->elf)))
14400 /* This is actually a static link, or it is a
14401 -Bsymbolic link and the symbol is defined
14402 locally, or the symbol was forced to be local
14403 because of a version file. */
14404 ;
14405 else
14406 {
14407 BFD_ASSERT (h->elf.dynindx != -1);
14408 indx = h->elf.dynindx;
14409 unresolved_reloc = FALSE;
14410 }
14411 ent = h->elf.got.glist;
14412 }
14413 else
14414 {
14415 if (local_got_ents == NULL)
14416 abort ();
14417 ent = local_got_ents[r_symndx];
14418 }
14419
14420 for (; ent != NULL; ent = ent->next)
14421 if (ent->addend == orig_rel.r_addend
14422 && ent->owner == input_bfd
14423 && ent->tls_type == tls_type)
14424 break;
14425 }
14426
14427 if (ent == NULL)
14428 abort ();
14429 if (ent->is_indirect)
14430 ent = ent->got.ent;
14431 offp = &ent->got.offset;
14432 got = ppc64_elf_tdata (ent->owner)->got;
14433 if (got == NULL)
14434 abort ();
14435
14436 /* The offset must always be a multiple of 8. We use the
14437 least significant bit to record whether we have already
14438 processed this entry. */
14439 off = *offp;
14440 if ((off & 1) != 0)
14441 off &= ~1;
14442 else
14443 {
14444 /* Generate relocs for the dynamic linker, except in
14445 the case of TLSLD where we'll use one entry per
14446 module. */
14447 asection *relgot;
14448 bfd_boolean ifunc;
14449
14450 *offp = off | 1;
14451 relgot = NULL;
14452 ifunc = (h != NULL
14453 ? h->elf.type == STT_GNU_IFUNC
14454 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC);
14455 if (ifunc)
14456 relgot = htab->elf.irelplt;
14457 else if ((bfd_link_pic (info) || indx != 0)
14458 && (h == NULL
14459 || (tls_type == (TLS_TLS | TLS_LD)
14460 && !h->elf.def_dynamic)
14461 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
14462 || h->elf.root.type != bfd_link_hash_undefweak))
14463 relgot = ppc64_elf_tdata (ent->owner)->relgot;
14464 if (relgot != NULL)
14465 {
14466 outrel.r_offset = (got->output_section->vma
14467 + got->output_offset
14468 + off);
14469 outrel.r_addend = addend;
14470 if (tls_type & (TLS_LD | TLS_GD))
14471 {
14472 outrel.r_addend = 0;
14473 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
14474 if (tls_type == (TLS_TLS | TLS_GD))
14475 {
14476 loc = relgot->contents;
14477 loc += (relgot->reloc_count++
14478 * sizeof (Elf64_External_Rela));
14479 bfd_elf64_swap_reloca_out (output_bfd,
14480 &outrel, loc);
14481 outrel.r_offset += 8;
14482 outrel.r_addend = addend;
14483 outrel.r_info
14484 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
14485 }
14486 }
14487 else if (tls_type == (TLS_TLS | TLS_DTPREL))
14488 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
14489 else if (tls_type == (TLS_TLS | TLS_TPREL))
14490 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
14491 else if (indx != 0)
14492 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
14493 else
14494 {
14495 if (ifunc)
14496 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
14497 else
14498 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
14499
14500 /* Write the .got section contents for the sake
14501 of prelink. */
14502 loc = got->contents + off;
14503 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
14504 loc);
14505 }
14506
14507 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
14508 {
14509 outrel.r_addend += relocation;
14510 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
14511 {
14512 if (htab->elf.tls_sec == NULL)
14513 outrel.r_addend = 0;
14514 else
14515 outrel.r_addend -= htab->elf.tls_sec->vma;
14516 }
14517 }
14518 loc = relgot->contents;
14519 loc += (relgot->reloc_count++
14520 * sizeof (Elf64_External_Rela));
14521 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
14522 }
14523
14524 /* Init the .got section contents here if we're not
14525 emitting a reloc. */
14526 else
14527 {
14528 relocation += addend;
14529 if (tls_type == (TLS_TLS | TLS_LD))
14530 relocation = 1;
14531 else if (tls_type != 0)
14532 {
14533 if (htab->elf.tls_sec == NULL)
14534 relocation = 0;
14535 else
14536 {
14537 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
14538 if (tls_type == (TLS_TLS | TLS_TPREL))
14539 relocation += DTP_OFFSET - TP_OFFSET;
14540 }
14541
14542 if (tls_type == (TLS_TLS | TLS_GD))
14543 {
14544 bfd_put_64 (output_bfd, relocation,
14545 got->contents + off + 8);
14546 relocation = 1;
14547 }
14548 }
14549
14550 bfd_put_64 (output_bfd, relocation,
14551 got->contents + off);
14552 }
14553 }
14554
14555 if (off >= (bfd_vma) -2)
14556 abort ();
14557
14558 relocation = got->output_section->vma + got->output_offset + off;
14559 addend = -(TOCstart + htab->sec_info[input_section->id].toc_off);
14560 }
14561 break;
14562
14563 case R_PPC64_PLT16_HA:
14564 case R_PPC64_PLT16_HI:
14565 case R_PPC64_PLT16_LO:
14566 case R_PPC64_PLT32:
14567 case R_PPC64_PLT64:
14568 /* Relocation is to the entry for this symbol in the
14569 procedure linkage table. */
14570 {
14571 struct plt_entry **plt_list = NULL;
14572 if (h != NULL)
14573 plt_list = &h->elf.plt.plist;
14574 else if (local_got_ents != NULL)
14575 {
14576 struct plt_entry **local_plt = (struct plt_entry **)
14577 (local_got_ents + symtab_hdr->sh_info);
14578 unsigned char *local_got_tls_masks = (unsigned char *)
14579 (local_plt + symtab_hdr->sh_info);
14580 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
14581 plt_list = local_plt + r_symndx;
14582 }
14583 if (plt_list)
14584 {
14585 struct plt_entry *ent;
14586
14587 for (ent = *plt_list; ent != NULL; ent = ent->next)
14588 if (ent->plt.offset != (bfd_vma) -1
14589 && ent->addend == orig_rel.r_addend)
14590 {
14591 asection *plt;
14592
14593 plt = htab->elf.splt;
14594 if (!htab->elf.dynamic_sections_created
14595 || h == NULL
14596 || h->elf.dynindx == -1)
14597 plt = htab->elf.iplt;
14598 relocation = (plt->output_section->vma
14599 + plt->output_offset
14600 + ent->plt.offset);
14601 addend = 0;
14602 unresolved_reloc = FALSE;
14603 break;
14604 }
14605 }
14606 }
14607 break;
14608
14609 case R_PPC64_TOC:
14610 /* Relocation value is TOC base. */
14611 relocation = TOCstart;
14612 if (r_symndx == STN_UNDEF)
14613 relocation += htab->sec_info[input_section->id].toc_off;
14614 else if (unresolved_reloc)
14615 ;
14616 else if (sec != NULL && sec->id < htab->sec_info_arr_size)
14617 relocation += htab->sec_info[sec->id].toc_off;
14618 else
14619 unresolved_reloc = TRUE;
14620 goto dodyn;
14621
14622 /* TOC16 relocs. We want the offset relative to the TOC base,
14623 which is the address of the start of the TOC plus 0x8000.
14624 The TOC consists of sections .got, .toc, .tocbss, and .plt,
14625 in this order. */
14626 case R_PPC64_TOC16:
14627 case R_PPC64_TOC16_LO:
14628 case R_PPC64_TOC16_HI:
14629 case R_PPC64_TOC16_DS:
14630 case R_PPC64_TOC16_LO_DS:
14631 case R_PPC64_TOC16_HA:
14632 addend -= TOCstart + htab->sec_info[input_section->id].toc_off;
14633 break;
14634
14635 /* Relocate against the beginning of the section. */
14636 case R_PPC64_SECTOFF:
14637 case R_PPC64_SECTOFF_LO:
14638 case R_PPC64_SECTOFF_HI:
14639 case R_PPC64_SECTOFF_DS:
14640 case R_PPC64_SECTOFF_LO_DS:
14641 case R_PPC64_SECTOFF_HA:
14642 if (sec != NULL)
14643 addend -= sec->output_section->vma;
14644 break;
14645
14646 case R_PPC64_REL16:
14647 case R_PPC64_REL16_LO:
14648 case R_PPC64_REL16_HI:
14649 case R_PPC64_REL16_HA:
14650 case R_PPC64_REL16DX_HA:
14651 break;
14652
14653 case R_PPC64_REL14:
14654 case R_PPC64_REL14_BRNTAKEN:
14655 case R_PPC64_REL14_BRTAKEN:
14656 case R_PPC64_REL24:
14657 break;
14658
14659 case R_PPC64_TPREL16:
14660 case R_PPC64_TPREL16_LO:
14661 case R_PPC64_TPREL16_HI:
14662 case R_PPC64_TPREL16_HA:
14663 case R_PPC64_TPREL16_DS:
14664 case R_PPC64_TPREL16_LO_DS:
14665 case R_PPC64_TPREL16_HIGH:
14666 case R_PPC64_TPREL16_HIGHA:
14667 case R_PPC64_TPREL16_HIGHER:
14668 case R_PPC64_TPREL16_HIGHERA:
14669 case R_PPC64_TPREL16_HIGHEST:
14670 case R_PPC64_TPREL16_HIGHESTA:
14671 if (h != NULL
14672 && h->elf.root.type == bfd_link_hash_undefweak
14673 && h->elf.dynindx == -1)
14674 {
14675 /* Make this relocation against an undefined weak symbol
14676 resolve to zero. This is really just a tweak, since
14677 code using weak externs ought to check that they are
14678 defined before using them. */
14679 bfd_byte *p = contents + rel->r_offset - d_offset;
14680
14681 insn = bfd_get_32 (output_bfd, p);
14682 insn = _bfd_elf_ppc_at_tprel_transform (insn, 13);
14683 if (insn != 0)
14684 bfd_put_32 (output_bfd, insn, p);
14685 break;
14686 }
14687 if (htab->elf.tls_sec != NULL)
14688 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
14689 if (bfd_link_pic (info))
14690 /* The TPREL16 relocs shouldn't really be used in shared
14691 libs as they will result in DT_TEXTREL being set, but
14692 support them anyway. */
14693 goto dodyn;
14694 break;
14695
14696 case R_PPC64_DTPREL16:
14697 case R_PPC64_DTPREL16_LO:
14698 case R_PPC64_DTPREL16_HI:
14699 case R_PPC64_DTPREL16_HA:
14700 case R_PPC64_DTPREL16_DS:
14701 case R_PPC64_DTPREL16_LO_DS:
14702 case R_PPC64_DTPREL16_HIGH:
14703 case R_PPC64_DTPREL16_HIGHA:
14704 case R_PPC64_DTPREL16_HIGHER:
14705 case R_PPC64_DTPREL16_HIGHERA:
14706 case R_PPC64_DTPREL16_HIGHEST:
14707 case R_PPC64_DTPREL16_HIGHESTA:
14708 if (htab->elf.tls_sec != NULL)
14709 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
14710 break;
14711
14712 case R_PPC64_ADDR64_LOCAL:
14713 addend += PPC64_LOCAL_ENTRY_OFFSET (h != NULL
14714 ? h->elf.other
14715 : sym->st_other);
14716 break;
14717
14718 case R_PPC64_DTPMOD64:
14719 relocation = 1;
14720 addend = 0;
14721 goto dodyn;
14722
14723 case R_PPC64_TPREL64:
14724 if (htab->elf.tls_sec != NULL)
14725 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
14726 goto dodyn;
14727
14728 case R_PPC64_DTPREL64:
14729 if (htab->elf.tls_sec != NULL)
14730 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
14731 /* Fall thru */
14732
14733 /* Relocations that may need to be propagated if this is a
14734 dynamic object. */
14735 case R_PPC64_REL30:
14736 case R_PPC64_REL32:
14737 case R_PPC64_REL64:
14738 case R_PPC64_ADDR14:
14739 case R_PPC64_ADDR14_BRNTAKEN:
14740 case R_PPC64_ADDR14_BRTAKEN:
14741 case R_PPC64_ADDR16:
14742 case R_PPC64_ADDR16_DS:
14743 case R_PPC64_ADDR16_HA:
14744 case R_PPC64_ADDR16_HI:
14745 case R_PPC64_ADDR16_HIGH:
14746 case R_PPC64_ADDR16_HIGHA:
14747 case R_PPC64_ADDR16_HIGHER:
14748 case R_PPC64_ADDR16_HIGHERA:
14749 case R_PPC64_ADDR16_HIGHEST:
14750 case R_PPC64_ADDR16_HIGHESTA:
14751 case R_PPC64_ADDR16_LO:
14752 case R_PPC64_ADDR16_LO_DS:
14753 case R_PPC64_ADDR24:
14754 case R_PPC64_ADDR32:
14755 case R_PPC64_ADDR64:
14756 case R_PPC64_UADDR16:
14757 case R_PPC64_UADDR32:
14758 case R_PPC64_UADDR64:
14759 dodyn:
14760 if ((input_section->flags & SEC_ALLOC) == 0)
14761 break;
14762
14763 if (NO_OPD_RELOCS && is_opd)
14764 break;
14765
14766 if (bfd_link_pic (info)
14767 ? ((h != NULL && pc_dynrelocs (h))
14768 || must_be_dyn_reloc (info, r_type))
14769 : (h != NULL
14770 ? h->dyn_relocs != NULL
14771 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
14772 {
14773 bfd_boolean skip, relocate;
14774 asection *sreloc;
14775 bfd_vma out_off;
14776
14777 /* When generating a dynamic object, these relocations
14778 are copied into the output file to be resolved at run
14779 time. */
14780
14781 skip = FALSE;
14782 relocate = FALSE;
14783
14784 out_off = _bfd_elf_section_offset (output_bfd, info,
14785 input_section, rel->r_offset);
14786 if (out_off == (bfd_vma) -1)
14787 skip = TRUE;
14788 else if (out_off == (bfd_vma) -2)
14789 skip = TRUE, relocate = TRUE;
14790 out_off += (input_section->output_section->vma
14791 + input_section->output_offset);
14792 outrel.r_offset = out_off;
14793 outrel.r_addend = rel->r_addend;
14794
14795 /* Optimize unaligned reloc use. */
14796 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
14797 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
14798 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
14799 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
14800 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
14801 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
14802 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
14803 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
14804 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
14805
14806 if (skip)
14807 memset (&outrel, 0, sizeof outrel);
14808 else if (!SYMBOL_REFERENCES_LOCAL (info, &h->elf)
14809 && !is_opd
14810 && r_type != R_PPC64_TOC)
14811 {
14812 BFD_ASSERT (h->elf.dynindx != -1);
14813 outrel.r_info = ELF64_R_INFO (h->elf.dynindx, r_type);
14814 }
14815 else
14816 {
14817 /* This symbol is local, or marked to become local,
14818 or this is an opd section reloc which must point
14819 at a local function. */
14820 outrel.r_addend += relocation;
14821 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
14822 {
14823 if (is_opd && h != NULL)
14824 {
14825 /* Lie about opd entries. This case occurs
14826 when building shared libraries and we
14827 reference a function in another shared
14828 lib. The same thing happens for a weak
14829 definition in an application that's
14830 overridden by a strong definition in a
14831 shared lib. (I believe this is a generic
14832 bug in binutils handling of weak syms.)
14833 In these cases we won't use the opd
14834 entry in this lib. */
14835 unresolved_reloc = FALSE;
14836 }
14837 if (!is_opd
14838 && r_type == R_PPC64_ADDR64
14839 && (h != NULL
14840 ? h->elf.type == STT_GNU_IFUNC
14841 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
14842 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
14843 else
14844 {
14845 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
14846
14847 /* We need to relocate .opd contents for ld.so.
14848 Prelink also wants simple and consistent rules
14849 for relocs. This make all RELATIVE relocs have
14850 *r_offset equal to r_addend. */
14851 relocate = TRUE;
14852 }
14853 }
14854 else
14855 {
14856 long indx = 0;
14857
14858 if (h != NULL
14859 ? h->elf.type == STT_GNU_IFUNC
14860 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
14861 {
14862 info->callbacks->einfo
14863 (_("%P: %H: %s for indirect "
14864 "function `%T' unsupported\n"),
14865 input_bfd, input_section, rel->r_offset,
14866 ppc64_elf_howto_table[r_type]->name,
14867 sym_name);
14868 ret = FALSE;
14869 }
14870 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
14871 ;
14872 else if (sec == NULL || sec->owner == NULL)
14873 {
14874 bfd_set_error (bfd_error_bad_value);
14875 return FALSE;
14876 }
14877 else
14878 {
14879 asection *osec;
14880
14881 osec = sec->output_section;
14882 indx = elf_section_data (osec)->dynindx;
14883
14884 if (indx == 0)
14885 {
14886 if ((osec->flags & SEC_READONLY) == 0
14887 && htab->elf.data_index_section != NULL)
14888 osec = htab->elf.data_index_section;
14889 else
14890 osec = htab->elf.text_index_section;
14891 indx = elf_section_data (osec)->dynindx;
14892 }
14893 BFD_ASSERT (indx != 0);
14894
14895 /* We are turning this relocation into one
14896 against a section symbol, so subtract out
14897 the output section's address but not the
14898 offset of the input section in the output
14899 section. */
14900 outrel.r_addend -= osec->vma;
14901 }
14902
14903 outrel.r_info = ELF64_R_INFO (indx, r_type);
14904 }
14905 }
14906
14907 sreloc = elf_section_data (input_section)->sreloc;
14908 if (h != NULL
14909 ? h->elf.type == STT_GNU_IFUNC
14910 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
14911 sreloc = htab->elf.irelplt;
14912 if (sreloc == NULL)
14913 abort ();
14914
14915 if (sreloc->reloc_count * sizeof (Elf64_External_Rela)
14916 >= sreloc->size)
14917 abort ();
14918 loc = sreloc->contents;
14919 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
14920 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
14921
14922 /* If this reloc is against an external symbol, it will
14923 be computed at runtime, so there's no need to do
14924 anything now. However, for the sake of prelink ensure
14925 that the section contents are a known value. */
14926 if (! relocate)
14927 {
14928 unresolved_reloc = FALSE;
14929 /* The value chosen here is quite arbitrary as ld.so
14930 ignores section contents except for the special
14931 case of .opd where the contents might be accessed
14932 before relocation. Choose zero, as that won't
14933 cause reloc overflow. */
14934 relocation = 0;
14935 addend = 0;
14936 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
14937 to improve backward compatibility with older
14938 versions of ld. */
14939 if (r_type == R_PPC64_ADDR64)
14940 addend = outrel.r_addend;
14941 /* Adjust pc_relative relocs to have zero in *r_offset. */
14942 else if (ppc64_elf_howto_table[r_type]->pc_relative)
14943 addend = (input_section->output_section->vma
14944 + input_section->output_offset
14945 + rel->r_offset);
14946 }
14947 }
14948 break;
14949
14950 case R_PPC64_COPY:
14951 case R_PPC64_GLOB_DAT:
14952 case R_PPC64_JMP_SLOT:
14953 case R_PPC64_JMP_IREL:
14954 case R_PPC64_RELATIVE:
14955 /* We shouldn't ever see these dynamic relocs in relocatable
14956 files. */
14957 /* Fall through. */
14958
14959 case R_PPC64_PLTGOT16:
14960 case R_PPC64_PLTGOT16_DS:
14961 case R_PPC64_PLTGOT16_HA:
14962 case R_PPC64_PLTGOT16_HI:
14963 case R_PPC64_PLTGOT16_LO:
14964 case R_PPC64_PLTGOT16_LO_DS:
14965 case R_PPC64_PLTREL32:
14966 case R_PPC64_PLTREL64:
14967 /* These ones haven't been implemented yet. */
14968
14969 info->callbacks->einfo
14970 (_("%P: %B: %s is not supported for `%T'\n"),
14971 input_bfd,
14972 ppc64_elf_howto_table[r_type]->name, sym_name);
14973
14974 bfd_set_error (bfd_error_invalid_operation);
14975 ret = FALSE;
14976 goto copy_reloc;
14977 }
14978
14979 /* Multi-instruction sequences that access the TOC can be
14980 optimized, eg. addis ra,r2,0; addi rb,ra,x;
14981 to nop; addi rb,r2,x; */
14982 switch (r_type)
14983 {
14984 default:
14985 break;
14986
14987 case R_PPC64_GOT_TLSLD16_HI:
14988 case R_PPC64_GOT_TLSGD16_HI:
14989 case R_PPC64_GOT_TPREL16_HI:
14990 case R_PPC64_GOT_DTPREL16_HI:
14991 case R_PPC64_GOT16_HI:
14992 case R_PPC64_TOC16_HI:
14993 /* These relocs would only be useful if building up an
14994 offset to later add to r2, perhaps in an indexed
14995 addressing mode instruction. Don't try to optimize.
14996 Unfortunately, the possibility of someone building up an
14997 offset like this or even with the HA relocs, means that
14998 we need to check the high insn when optimizing the low
14999 insn. */
15000 break;
15001
15002 case R_PPC64_GOT_TLSLD16_HA:
15003 case R_PPC64_GOT_TLSGD16_HA:
15004 case R_PPC64_GOT_TPREL16_HA:
15005 case R_PPC64_GOT_DTPREL16_HA:
15006 case R_PPC64_GOT16_HA:
15007 case R_PPC64_TOC16_HA:
15008 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
15009 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
15010 {
15011 bfd_byte *p = contents + (rel->r_offset & ~3);
15012 bfd_put_32 (input_bfd, NOP, p);
15013 }
15014 break;
15015
15016 case R_PPC64_GOT_TLSLD16_LO:
15017 case R_PPC64_GOT_TLSGD16_LO:
15018 case R_PPC64_GOT_TPREL16_LO_DS:
15019 case R_PPC64_GOT_DTPREL16_LO_DS:
15020 case R_PPC64_GOT16_LO:
15021 case R_PPC64_GOT16_LO_DS:
15022 case R_PPC64_TOC16_LO:
15023 case R_PPC64_TOC16_LO_DS:
15024 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
15025 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
15026 {
15027 bfd_byte *p = contents + (rel->r_offset & ~3);
15028 insn = bfd_get_32 (input_bfd, p);
15029 if ((insn & (0x3f << 26)) == 12u << 26 /* addic */)
15030 {
15031 /* Transform addic to addi when we change reg. */
15032 insn &= ~((0x3f << 26) | (0x1f << 16));
15033 insn |= (14u << 26) | (2 << 16);
15034 }
15035 else
15036 {
15037 insn &= ~(0x1f << 16);
15038 insn |= 2 << 16;
15039 }
15040 bfd_put_32 (input_bfd, insn, p);
15041 }
15042 break;
15043 }
15044
15045 /* Do any further special processing. */
15046 howto = ppc64_elf_howto_table[(int) r_type];
15047 switch (r_type)
15048 {
15049 default:
15050 break;
15051
15052 case R_PPC64_REL16_HA:
15053 case R_PPC64_REL16DX_HA:
15054 case R_PPC64_ADDR16_HA:
15055 case R_PPC64_ADDR16_HIGHA:
15056 case R_PPC64_ADDR16_HIGHERA:
15057 case R_PPC64_ADDR16_HIGHESTA:
15058 case R_PPC64_TOC16_HA:
15059 case R_PPC64_SECTOFF_HA:
15060 case R_PPC64_TPREL16_HA:
15061 case R_PPC64_TPREL16_HIGHA:
15062 case R_PPC64_TPREL16_HIGHERA:
15063 case R_PPC64_TPREL16_HIGHESTA:
15064 case R_PPC64_DTPREL16_HA:
15065 case R_PPC64_DTPREL16_HIGHA:
15066 case R_PPC64_DTPREL16_HIGHERA:
15067 case R_PPC64_DTPREL16_HIGHESTA:
15068 /* It's just possible that this symbol is a weak symbol
15069 that's not actually defined anywhere. In that case,
15070 'sec' would be NULL, and we should leave the symbol
15071 alone (it will be set to zero elsewhere in the link). */
15072 if (sec == NULL)
15073 break;
15074 /* Fall thru */
15075
15076 case R_PPC64_GOT16_HA:
15077 case R_PPC64_PLTGOT16_HA:
15078 case R_PPC64_PLT16_HA:
15079 case R_PPC64_GOT_TLSGD16_HA:
15080 case R_PPC64_GOT_TLSLD16_HA:
15081 case R_PPC64_GOT_TPREL16_HA:
15082 case R_PPC64_GOT_DTPREL16_HA:
15083 /* Add 0x10000 if sign bit in 0:15 is set.
15084 Bits 0:15 are not used. */
15085 addend += 0x8000;
15086 break;
15087
15088 case R_PPC64_ADDR16_DS:
15089 case R_PPC64_ADDR16_LO_DS:
15090 case R_PPC64_GOT16_DS:
15091 case R_PPC64_GOT16_LO_DS:
15092 case R_PPC64_PLT16_LO_DS:
15093 case R_PPC64_SECTOFF_DS:
15094 case R_PPC64_SECTOFF_LO_DS:
15095 case R_PPC64_TOC16_DS:
15096 case R_PPC64_TOC16_LO_DS:
15097 case R_PPC64_PLTGOT16_DS:
15098 case R_PPC64_PLTGOT16_LO_DS:
15099 case R_PPC64_GOT_TPREL16_DS:
15100 case R_PPC64_GOT_TPREL16_LO_DS:
15101 case R_PPC64_GOT_DTPREL16_DS:
15102 case R_PPC64_GOT_DTPREL16_LO_DS:
15103 case R_PPC64_TPREL16_DS:
15104 case R_PPC64_TPREL16_LO_DS:
15105 case R_PPC64_DTPREL16_DS:
15106 case R_PPC64_DTPREL16_LO_DS:
15107 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
15108 mask = 3;
15109 /* If this reloc is against an lq, lxv, or stxv insn, then
15110 the value must be a multiple of 16. This is somewhat of
15111 a hack, but the "correct" way to do this by defining _DQ
15112 forms of all the _DS relocs bloats all reloc switches in
15113 this file. It doesn't make much sense to use these
15114 relocs in data, so testing the insn should be safe. */
15115 if ((insn & (0x3f << 26)) == (56u << 26)
15116 || ((insn & (0x3f << 26)) == (61u << 26) && (insn & 3) == 1))
15117 mask = 15;
15118 relocation += addend;
15119 addend = insn & (mask ^ 3);
15120 if ((relocation & mask) != 0)
15121 {
15122 relocation ^= relocation & mask;
15123 info->callbacks->einfo
15124 (_("%P: %H: error: %s not a multiple of %u\n"),
15125 input_bfd, input_section, rel->r_offset,
15126 howto->name,
15127 mask + 1);
15128 bfd_set_error (bfd_error_bad_value);
15129 ret = FALSE;
15130 goto copy_reloc;
15131 }
15132 break;
15133 }
15134
15135 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
15136 because such sections are not SEC_ALLOC and thus ld.so will
15137 not process them. */
15138 if (unresolved_reloc
15139 && !((input_section->flags & SEC_DEBUGGING) != 0
15140 && h->elf.def_dynamic)
15141 && _bfd_elf_section_offset (output_bfd, info, input_section,
15142 rel->r_offset) != (bfd_vma) -1)
15143 {
15144 info->callbacks->einfo
15145 (_("%P: %H: unresolvable %s against `%T'\n"),
15146 input_bfd, input_section, rel->r_offset,
15147 howto->name,
15148 h->elf.root.root.string);
15149 ret = FALSE;
15150 }
15151
15152 /* 16-bit fields in insns mostly have signed values, but a
15153 few insns have 16-bit unsigned values. Really, we should
15154 have different reloc types. */
15155 if (howto->complain_on_overflow != complain_overflow_dont
15156 && howto->dst_mask == 0xffff
15157 && (input_section->flags & SEC_CODE) != 0)
15158 {
15159 enum complain_overflow complain = complain_overflow_signed;
15160
15161 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
15162 if ((insn & (0x3f << 26)) == 10u << 26 /* cmpli */)
15163 complain = complain_overflow_bitfield;
15164 else if (howto->rightshift == 0
15165 ? ((insn & (0x3f << 26)) == 28u << 26 /* andi */
15166 || (insn & (0x3f << 26)) == 24u << 26 /* ori */
15167 || (insn & (0x3f << 26)) == 26u << 26 /* xori */)
15168 : ((insn & (0x3f << 26)) == 29u << 26 /* andis */
15169 || (insn & (0x3f << 26)) == 25u << 26 /* oris */
15170 || (insn & (0x3f << 26)) == 27u << 26 /* xoris */))
15171 complain = complain_overflow_unsigned;
15172 if (howto->complain_on_overflow != complain)
15173 {
15174 alt_howto = *howto;
15175 alt_howto.complain_on_overflow = complain;
15176 howto = &alt_howto;
15177 }
15178 }
15179
15180 if (r_type == R_PPC64_REL16DX_HA)
15181 {
15182 /* Split field reloc isn't handled by _bfd_final_link_relocate. */
15183 if (rel->r_offset + 4 > input_section->size)
15184 r = bfd_reloc_outofrange;
15185 else
15186 {
15187 relocation += addend;
15188 relocation -= (rel->r_offset
15189 + input_section->output_offset
15190 + input_section->output_section->vma);
15191 relocation = (bfd_signed_vma) relocation >> 16;
15192 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
15193 insn &= ~0x1fffc1;
15194 insn |= (relocation & 0xffc1) | ((relocation & 0x3e) << 15);
15195 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
15196 r = bfd_reloc_ok;
15197 if (relocation + 0x8000 > 0xffff)
15198 r = bfd_reloc_overflow;
15199 }
15200 }
15201 else
15202 r = _bfd_final_link_relocate (howto, input_bfd, input_section, contents,
15203 rel->r_offset, relocation, addend);
15204
15205 if (r != bfd_reloc_ok)
15206 {
15207 char *more_info = NULL;
15208 const char *reloc_name = howto->name;
15209
15210 if (reloc_dest != DEST_NORMAL)
15211 {
15212 more_info = bfd_malloc (strlen (reloc_name) + 8);
15213 if (more_info != NULL)
15214 {
15215 strcpy (more_info, reloc_name);
15216 strcat (more_info, (reloc_dest == DEST_OPD
15217 ? " (OPD)" : " (stub)"));
15218 reloc_name = more_info;
15219 }
15220 }
15221
15222 if (r == bfd_reloc_overflow)
15223 {
15224 /* On code like "if (foo) foo();" don't report overflow
15225 on a branch to zero when foo is undefined. */
15226 if (!warned
15227 && (reloc_dest == DEST_STUB
15228 || !(h != NULL
15229 && (h->elf.root.type == bfd_link_hash_undefweak
15230 || h->elf.root.type == bfd_link_hash_undefined)
15231 && is_branch_reloc (r_type))))
15232 info->callbacks->reloc_overflow (info, &h->elf.root,
15233 sym_name, reloc_name,
15234 orig_rel.r_addend,
15235 input_bfd, input_section,
15236 rel->r_offset);
15237 }
15238 else
15239 {
15240 info->callbacks->einfo
15241 (_("%P: %H: %s against `%T': error %d\n"),
15242 input_bfd, input_section, rel->r_offset,
15243 reloc_name, sym_name, (int) r);
15244 ret = FALSE;
15245 }
15246 if (more_info != NULL)
15247 free (more_info);
15248 }
15249 copy_reloc:
15250 if (wrel != rel)
15251 *wrel = *rel;
15252 }
15253
15254 if (wrel != rel)
15255 {
15256 Elf_Internal_Shdr *rel_hdr;
15257 size_t deleted = rel - wrel;
15258
15259 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
15260 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
15261 if (rel_hdr->sh_size == 0)
15262 {
15263 /* It is too late to remove an empty reloc section. Leave
15264 one NONE reloc.
15265 ??? What is wrong with an empty section??? */
15266 rel_hdr->sh_size = rel_hdr->sh_entsize;
15267 deleted -= 1;
15268 }
15269 rel_hdr = _bfd_elf_single_rel_hdr (input_section);
15270 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
15271 input_section->reloc_count -= deleted;
15272 }
15273
15274 /* If we're emitting relocations, then shortly after this function
15275 returns, reloc offsets and addends for this section will be
15276 adjusted. Worse, reloc symbol indices will be for the output
15277 file rather than the input. Save a copy of the relocs for
15278 opd_entry_value. */
15279 if (is_opd && (info->emitrelocations || bfd_link_relocatable (info)))
15280 {
15281 bfd_size_type amt;
15282 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
15283 rel = bfd_alloc (input_bfd, amt);
15284 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd.relocs == NULL);
15285 ppc64_elf_tdata (input_bfd)->opd.relocs = rel;
15286 if (rel == NULL)
15287 return FALSE;
15288 memcpy (rel, relocs, amt);
15289 }
15290 return ret;
15291 }
15292
15293 /* Adjust the value of any local symbols in opd sections. */
15294
15295 static int
15296 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
15297 const char *name ATTRIBUTE_UNUSED,
15298 Elf_Internal_Sym *elfsym,
15299 asection *input_sec,
15300 struct elf_link_hash_entry *h)
15301 {
15302 struct _opd_sec_data *opd;
15303 long adjust;
15304 bfd_vma value;
15305
15306 if (h != NULL)
15307 return 1;
15308
15309 opd = get_opd_info (input_sec);
15310 if (opd == NULL || opd->adjust == NULL)
15311 return 1;
15312
15313 value = elfsym->st_value - input_sec->output_offset;
15314 if (!bfd_link_relocatable (info))
15315 value -= input_sec->output_section->vma;
15316
15317 adjust = opd->adjust[OPD_NDX (value)];
15318 if (adjust == -1)
15319 return 2;
15320
15321 elfsym->st_value += adjust;
15322 return 1;
15323 }
15324
15325 /* Finish up dynamic symbol handling. We set the contents of various
15326 dynamic sections here. */
15327
15328 static bfd_boolean
15329 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
15330 struct bfd_link_info *info,
15331 struct elf_link_hash_entry *h,
15332 Elf_Internal_Sym *sym ATTRIBUTE_UNUSED)
15333 {
15334 struct ppc_link_hash_table *htab;
15335 struct plt_entry *ent;
15336 Elf_Internal_Rela rela;
15337 bfd_byte *loc;
15338
15339 htab = ppc_hash_table (info);
15340 if (htab == NULL)
15341 return FALSE;
15342
15343 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
15344 if (ent->plt.offset != (bfd_vma) -1)
15345 {
15346 /* This symbol has an entry in the procedure linkage
15347 table. Set it up. */
15348 if (!htab->elf.dynamic_sections_created
15349 || h->dynindx == -1)
15350 {
15351 BFD_ASSERT (h->type == STT_GNU_IFUNC
15352 && h->def_regular
15353 && (h->root.type == bfd_link_hash_defined
15354 || h->root.type == bfd_link_hash_defweak));
15355 rela.r_offset = (htab->elf.iplt->output_section->vma
15356 + htab->elf.iplt->output_offset
15357 + ent->plt.offset);
15358 if (htab->opd_abi)
15359 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
15360 else
15361 rela.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
15362 rela.r_addend = (h->root.u.def.value
15363 + h->root.u.def.section->output_offset
15364 + h->root.u.def.section->output_section->vma
15365 + ent->addend);
15366 loc = (htab->elf.irelplt->contents
15367 + (htab->elf.irelplt->reloc_count++
15368 * sizeof (Elf64_External_Rela)));
15369 }
15370 else
15371 {
15372 rela.r_offset = (htab->elf.splt->output_section->vma
15373 + htab->elf.splt->output_offset
15374 + ent->plt.offset);
15375 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
15376 rela.r_addend = ent->addend;
15377 loc = (htab->elf.srelplt->contents
15378 + ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE (htab))
15379 / PLT_ENTRY_SIZE (htab) * sizeof (Elf64_External_Rela)));
15380 }
15381 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
15382
15383 if (!htab->opd_abi)
15384 {
15385 if (!h->def_regular)
15386 {
15387 /* Mark the symbol as undefined, rather than as
15388 defined in glink. Leave the value if there were
15389 any relocations where pointer equality matters
15390 (this is a clue for the dynamic linker, to make
15391 function pointer comparisons work between an
15392 application and shared library), otherwise set it
15393 to zero. */
15394 sym->st_shndx = SHN_UNDEF;
15395 if (!h->pointer_equality_needed)
15396 sym->st_value = 0;
15397 else if (!h->ref_regular_nonweak)
15398 {
15399 /* This breaks function pointer comparisons, but
15400 that is better than breaking tests for a NULL
15401 function pointer. */
15402 sym->st_value = 0;
15403 }
15404 }
15405 }
15406 }
15407
15408 if (h->needs_copy)
15409 {
15410 /* This symbol needs a copy reloc. Set it up. */
15411
15412 if (h->dynindx == -1
15413 || (h->root.type != bfd_link_hash_defined
15414 && h->root.type != bfd_link_hash_defweak)
15415 || htab->relbss == NULL)
15416 abort ();
15417
15418 rela.r_offset = (h->root.u.def.value
15419 + h->root.u.def.section->output_section->vma
15420 + h->root.u.def.section->output_offset);
15421 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
15422 rela.r_addend = 0;
15423 loc = htab->relbss->contents;
15424 loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela);
15425 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
15426 }
15427
15428 return TRUE;
15429 }
15430
15431 /* Used to decide how to sort relocs in an optimal manner for the
15432 dynamic linker, before writing them out. */
15433
15434 static enum elf_reloc_type_class
15435 ppc64_elf_reloc_type_class (const struct bfd_link_info *info,
15436 const asection *rel_sec,
15437 const Elf_Internal_Rela *rela)
15438 {
15439 enum elf_ppc64_reloc_type r_type;
15440 struct ppc_link_hash_table *htab = ppc_hash_table (info);
15441
15442 if (rel_sec == htab->elf.irelplt)
15443 return reloc_class_ifunc;
15444
15445 r_type = ELF64_R_TYPE (rela->r_info);
15446 switch (r_type)
15447 {
15448 case R_PPC64_RELATIVE:
15449 return reloc_class_relative;
15450 case R_PPC64_JMP_SLOT:
15451 return reloc_class_plt;
15452 case R_PPC64_COPY:
15453 return reloc_class_copy;
15454 default:
15455 return reloc_class_normal;
15456 }
15457 }
15458
15459 /* Finish up the dynamic sections. */
15460
15461 static bfd_boolean
15462 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
15463 struct bfd_link_info *info)
15464 {
15465 struct ppc_link_hash_table *htab;
15466 bfd *dynobj;
15467 asection *sdyn;
15468
15469 htab = ppc_hash_table (info);
15470 if (htab == NULL)
15471 return FALSE;
15472
15473 dynobj = htab->elf.dynobj;
15474 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
15475
15476 if (htab->elf.dynamic_sections_created)
15477 {
15478 Elf64_External_Dyn *dyncon, *dynconend;
15479
15480 if (sdyn == NULL || htab->elf.sgot == NULL)
15481 abort ();
15482
15483 dyncon = (Elf64_External_Dyn *) sdyn->contents;
15484 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
15485 for (; dyncon < dynconend; dyncon++)
15486 {
15487 Elf_Internal_Dyn dyn;
15488 asection *s;
15489
15490 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
15491
15492 switch (dyn.d_tag)
15493 {
15494 default:
15495 continue;
15496
15497 case DT_PPC64_GLINK:
15498 s = htab->glink;
15499 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15500 /* We stupidly defined DT_PPC64_GLINK to be the start
15501 of glink rather than the first entry point, which is
15502 what ld.so needs, and now have a bigger stub to
15503 support automatic multiple TOCs. */
15504 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 8 * 4;
15505 break;
15506
15507 case DT_PPC64_OPD:
15508 s = bfd_get_section_by_name (output_bfd, ".opd");
15509 if (s == NULL)
15510 continue;
15511 dyn.d_un.d_ptr = s->vma;
15512 break;
15513
15514 case DT_PPC64_OPT:
15515 if (htab->do_multi_toc && htab->multi_toc_needed)
15516 dyn.d_un.d_val |= PPC64_OPT_MULTI_TOC;
15517 break;
15518
15519 case DT_PPC64_OPDSZ:
15520 s = bfd_get_section_by_name (output_bfd, ".opd");
15521 if (s == NULL)
15522 continue;
15523 dyn.d_un.d_val = s->size;
15524 break;
15525
15526 case DT_PLTGOT:
15527 s = htab->elf.splt;
15528 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15529 break;
15530
15531 case DT_JMPREL:
15532 s = htab->elf.srelplt;
15533 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15534 break;
15535
15536 case DT_PLTRELSZ:
15537 dyn.d_un.d_val = htab->elf.srelplt->size;
15538 break;
15539
15540 case DT_RELASZ:
15541 /* Don't count procedure linkage table relocs in the
15542 overall reloc count. */
15543 s = htab->elf.srelplt;
15544 if (s == NULL)
15545 continue;
15546 dyn.d_un.d_val -= s->size;
15547 break;
15548
15549 case DT_RELA:
15550 /* We may not be using the standard ELF linker script.
15551 If .rela.plt is the first .rela section, we adjust
15552 DT_RELA to not include it. */
15553 s = htab->elf.srelplt;
15554 if (s == NULL)
15555 continue;
15556 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
15557 continue;
15558 dyn.d_un.d_ptr += s->size;
15559 break;
15560 }
15561
15562 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
15563 }
15564 }
15565
15566 if (htab->elf.sgot != NULL && htab->elf.sgot->size != 0)
15567 {
15568 /* Fill in the first entry in the global offset table.
15569 We use it to hold the link-time TOCbase. */
15570 bfd_put_64 (output_bfd,
15571 elf_gp (output_bfd) + TOC_BASE_OFF,
15572 htab->elf.sgot->contents);
15573
15574 /* Set .got entry size. */
15575 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 8;
15576 }
15577
15578 if (htab->elf.splt != NULL && htab->elf.splt->size != 0)
15579 {
15580 /* Set .plt entry size. */
15581 elf_section_data (htab->elf.splt->output_section)->this_hdr.sh_entsize
15582 = PLT_ENTRY_SIZE (htab);
15583 }
15584
15585 /* brlt is SEC_LINKER_CREATED, so we need to write out relocs for
15586 brlt ourselves if emitrelocations. */
15587 if (htab->brlt != NULL
15588 && htab->brlt->reloc_count != 0
15589 && !_bfd_elf_link_output_relocs (output_bfd,
15590 htab->brlt,
15591 elf_section_data (htab->brlt)->rela.hdr,
15592 elf_section_data (htab->brlt)->relocs,
15593 NULL))
15594 return FALSE;
15595
15596 if (htab->glink != NULL
15597 && htab->glink->reloc_count != 0
15598 && !_bfd_elf_link_output_relocs (output_bfd,
15599 htab->glink,
15600 elf_section_data (htab->glink)->rela.hdr,
15601 elf_section_data (htab->glink)->relocs,
15602 NULL))
15603 return FALSE;
15604
15605 if (htab->glink_eh_frame != NULL
15606 && htab->glink_eh_frame->size != 0)
15607 {
15608 bfd_vma val;
15609 bfd_byte *p;
15610 asection *stub_sec;
15611
15612 p = htab->glink_eh_frame->contents + sizeof (glink_eh_frame_cie);
15613 for (stub_sec = htab->params->stub_bfd->sections;
15614 stub_sec != NULL;
15615 stub_sec = stub_sec->next)
15616 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
15617 {
15618 /* FDE length. */
15619 p += 4;
15620 /* CIE pointer. */
15621 p += 4;
15622 /* Offset to stub section. */
15623 val = (stub_sec->output_section->vma
15624 + stub_sec->output_offset);
15625 val -= (htab->glink_eh_frame->output_section->vma
15626 + htab->glink_eh_frame->output_offset
15627 + (p - htab->glink_eh_frame->contents));
15628 if (val + 0x80000000 > 0xffffffff)
15629 {
15630 info->callbacks->einfo
15631 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
15632 stub_sec->name);
15633 return FALSE;
15634 }
15635 bfd_put_32 (dynobj, val, p);
15636 p += 4;
15637 /* stub section size. */
15638 p += 4;
15639 /* Augmentation. */
15640 p += 1;
15641 /* Pad. */
15642 p += 7;
15643 }
15644 if (htab->glink != NULL && htab->glink->size != 0)
15645 {
15646 /* FDE length. */
15647 p += 4;
15648 /* CIE pointer. */
15649 p += 4;
15650 /* Offset to .glink. */
15651 val = (htab->glink->output_section->vma
15652 + htab->glink->output_offset
15653 + 8);
15654 val -= (htab->glink_eh_frame->output_section->vma
15655 + htab->glink_eh_frame->output_offset
15656 + (p - htab->glink_eh_frame->contents));
15657 if (val + 0x80000000 > 0xffffffff)
15658 {
15659 info->callbacks->einfo
15660 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
15661 htab->glink->name);
15662 return FALSE;
15663 }
15664 bfd_put_32 (dynobj, val, p);
15665 p += 4;
15666 /* .glink size. */
15667 p += 4;
15668 /* Augmentation. */
15669 p += 1;
15670 /* Ops. */
15671 p += 7;
15672 }
15673
15674 if (htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME
15675 && !_bfd_elf_write_section_eh_frame (output_bfd, info,
15676 htab->glink_eh_frame,
15677 htab->glink_eh_frame->contents))
15678 return FALSE;
15679 }
15680
15681 /* We need to handle writing out multiple GOT sections ourselves,
15682 since we didn't add them to DYNOBJ. We know dynobj is the first
15683 bfd. */
15684 while ((dynobj = dynobj->link.next) != NULL)
15685 {
15686 asection *s;
15687
15688 if (!is_ppc64_elf (dynobj))
15689 continue;
15690
15691 s = ppc64_elf_tdata (dynobj)->got;
15692 if (s != NULL
15693 && s->size != 0
15694 && s->output_section != bfd_abs_section_ptr
15695 && !bfd_set_section_contents (output_bfd, s->output_section,
15696 s->contents, s->output_offset,
15697 s->size))
15698 return FALSE;
15699 s = ppc64_elf_tdata (dynobj)->relgot;
15700 if (s != NULL
15701 && s->size != 0
15702 && s->output_section != bfd_abs_section_ptr
15703 && !bfd_set_section_contents (output_bfd, s->output_section,
15704 s->contents, s->output_offset,
15705 s->size))
15706 return FALSE;
15707 }
15708
15709 return TRUE;
15710 }
15711
15712 #include "elf64-target.h"
15713
15714 /* FreeBSD support */
15715
15716 #undef TARGET_LITTLE_SYM
15717 #undef TARGET_LITTLE_NAME
15718
15719 #undef TARGET_BIG_SYM
15720 #define TARGET_BIG_SYM powerpc_elf64_fbsd_vec
15721 #undef TARGET_BIG_NAME
15722 #define TARGET_BIG_NAME "elf64-powerpc-freebsd"
15723
15724 #undef ELF_OSABI
15725 #define ELF_OSABI ELFOSABI_FREEBSD
15726
15727 #undef elf64_bed
15728 #define elf64_bed elf64_powerpc_fbsd_bed
15729
15730 #include "elf64-target.h"
15731
GDB Binutils - Deliverables
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