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[thirdparty/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 through */
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 /* Fall through. */
5623 case R_PPC64_TOC16_LO:
5624 case R_PPC64_TOC16_HI:
5625 case R_PPC64_TOC16_HA:
5626 case R_PPC64_TOC16_LO_DS:
5627 sec->has_toc_reloc = 1;
5628 break;
5629
5630 /* Marker reloc. */
5631 case R_PPC64_ENTRY:
5632 break;
5633
5634 /* This relocation describes the C++ object vtable hierarchy.
5635 Reconstruct it for later use during GC. */
5636 case R_PPC64_GNU_VTINHERIT:
5637 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
5638 return FALSE;
5639 break;
5640
5641 /* This relocation describes which C++ vtable entries are actually
5642 used. Record for later use during GC. */
5643 case R_PPC64_GNU_VTENTRY:
5644 BFD_ASSERT (h != NULL);
5645 if (h != NULL
5646 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
5647 return FALSE;
5648 break;
5649
5650 case R_PPC64_REL14:
5651 case R_PPC64_REL14_BRTAKEN:
5652 case R_PPC64_REL14_BRNTAKEN:
5653 {
5654 asection *dest = NULL;
5655
5656 /* Heuristic: If jumping outside our section, chances are
5657 we are going to need a stub. */
5658 if (h != NULL)
5659 {
5660 /* If the sym is weak it may be overridden later, so
5661 don't assume we know where a weak sym lives. */
5662 if (h->root.type == bfd_link_hash_defined)
5663 dest = h->root.u.def.section;
5664 }
5665 else
5666 {
5667 Elf_Internal_Sym *isym;
5668
5669 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5670 abfd, r_symndx);
5671 if (isym == NULL)
5672 return FALSE;
5673
5674 dest = bfd_section_from_elf_index (abfd, isym->st_shndx);
5675 }
5676
5677 if (dest != sec)
5678 ppc64_elf_section_data (sec)->has_14bit_branch = 1;
5679 }
5680 /* Fall through. */
5681
5682 case R_PPC64_REL24:
5683 plt_list = ifunc;
5684 if (h != NULL)
5685 {
5686 h->needs_plt = 1;
5687 if (h->root.root.string[0] == '.'
5688 && h->root.root.string[1] != '\0')
5689 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5690
5691 if (h == tga || h == dottga)
5692 {
5693 sec->has_tls_reloc = 1;
5694 if (rel != relocs
5695 && (ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSGD
5696 || ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSLD))
5697 /* We have a new-style __tls_get_addr call with
5698 a marker reloc. */
5699 ;
5700 else
5701 /* Mark this section as having an old-style call. */
5702 sec->has_tls_get_addr_call = 1;
5703 }
5704 plt_list = &h->plt.plist;
5705 }
5706
5707 /* We may need a .plt entry if the function this reloc
5708 refers to is in a shared lib. */
5709 if (plt_list
5710 && !update_plt_info (abfd, plt_list, rel->r_addend))
5711 return FALSE;
5712 break;
5713
5714 case R_PPC64_ADDR14:
5715 case R_PPC64_ADDR14_BRNTAKEN:
5716 case R_PPC64_ADDR14_BRTAKEN:
5717 case R_PPC64_ADDR24:
5718 goto dodyn;
5719
5720 case R_PPC64_TPREL64:
5721 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
5722 if (bfd_link_pic (info))
5723 info->flags |= DF_STATIC_TLS;
5724 goto dotlstoc;
5725
5726 case R_PPC64_DTPMOD64:
5727 if (rel + 1 < rel_end
5728 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
5729 && rel[1].r_offset == rel->r_offset + 8)
5730 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
5731 else
5732 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
5733 goto dotlstoc;
5734
5735 case R_PPC64_DTPREL64:
5736 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
5737 if (rel != relocs
5738 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
5739 && rel[-1].r_offset == rel->r_offset - 8)
5740 /* This is the second reloc of a dtpmod, dtprel pair.
5741 Don't mark with TLS_DTPREL. */
5742 goto dodyn;
5743
5744 dotlstoc:
5745 sec->has_tls_reloc = 1;
5746 if (h != NULL)
5747 {
5748 struct ppc_link_hash_entry *eh;
5749 eh = (struct ppc_link_hash_entry *) h;
5750 eh->tls_mask |= tls_type;
5751 }
5752 else
5753 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5754 rel->r_addend, tls_type))
5755 return FALSE;
5756
5757 ppc64_sec = ppc64_elf_section_data (sec);
5758 if (ppc64_sec->sec_type != sec_toc)
5759 {
5760 bfd_size_type amt;
5761
5762 /* One extra to simplify get_tls_mask. */
5763 amt = sec->size * sizeof (unsigned) / 8 + sizeof (unsigned);
5764 ppc64_sec->u.toc.symndx = bfd_zalloc (abfd, amt);
5765 if (ppc64_sec->u.toc.symndx == NULL)
5766 return FALSE;
5767 amt = sec->size * sizeof (bfd_vma) / 8;
5768 ppc64_sec->u.toc.add = bfd_zalloc (abfd, amt);
5769 if (ppc64_sec->u.toc.add == NULL)
5770 return FALSE;
5771 BFD_ASSERT (ppc64_sec->sec_type == sec_normal);
5772 ppc64_sec->sec_type = sec_toc;
5773 }
5774 BFD_ASSERT (rel->r_offset % 8 == 0);
5775 ppc64_sec->u.toc.symndx[rel->r_offset / 8] = r_symndx;
5776 ppc64_sec->u.toc.add[rel->r_offset / 8] = rel->r_addend;
5777
5778 /* Mark the second slot of a GD or LD entry.
5779 -1 to indicate GD and -2 to indicate LD. */
5780 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
5781 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -1;
5782 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
5783 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -2;
5784 goto dodyn;
5785
5786 case R_PPC64_TPREL16:
5787 case R_PPC64_TPREL16_LO:
5788 case R_PPC64_TPREL16_HI:
5789 case R_PPC64_TPREL16_HA:
5790 case R_PPC64_TPREL16_DS:
5791 case R_PPC64_TPREL16_LO_DS:
5792 case R_PPC64_TPREL16_HIGH:
5793 case R_PPC64_TPREL16_HIGHA:
5794 case R_PPC64_TPREL16_HIGHER:
5795 case R_PPC64_TPREL16_HIGHERA:
5796 case R_PPC64_TPREL16_HIGHEST:
5797 case R_PPC64_TPREL16_HIGHESTA:
5798 if (bfd_link_pic (info))
5799 {
5800 info->flags |= DF_STATIC_TLS;
5801 goto dodyn;
5802 }
5803 break;
5804
5805 case R_PPC64_ADDR64:
5806 if (opd_sym_map != NULL
5807 && rel + 1 < rel_end
5808 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
5809 {
5810 if (h != NULL)
5811 {
5812 if (h->root.root.string[0] == '.'
5813 && h->root.root.string[1] != 0
5814 && lookup_fdh ((struct ppc_link_hash_entry *) h, htab))
5815 ;
5816 else
5817 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5818 }
5819 else
5820 {
5821 asection *s;
5822 Elf_Internal_Sym *isym;
5823
5824 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5825 abfd, r_symndx);
5826 if (isym == NULL)
5827 return FALSE;
5828
5829 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5830 if (s != NULL && s != sec)
5831 opd_sym_map[OPD_NDX (rel->r_offset)] = s;
5832 }
5833 }
5834 /* Fall through. */
5835
5836 case R_PPC64_ADDR16:
5837 case R_PPC64_ADDR16_DS:
5838 case R_PPC64_ADDR16_HA:
5839 case R_PPC64_ADDR16_HI:
5840 case R_PPC64_ADDR16_HIGH:
5841 case R_PPC64_ADDR16_HIGHA:
5842 case R_PPC64_ADDR16_HIGHER:
5843 case R_PPC64_ADDR16_HIGHERA:
5844 case R_PPC64_ADDR16_HIGHEST:
5845 case R_PPC64_ADDR16_HIGHESTA:
5846 case R_PPC64_ADDR16_LO:
5847 case R_PPC64_ADDR16_LO_DS:
5848 if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1
5849 && rel->r_addend == 0)
5850 {
5851 /* We may need a .plt entry if this reloc refers to a
5852 function in a shared lib. */
5853 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5854 return FALSE;
5855 h->pointer_equality_needed = 1;
5856 }
5857 /* Fall through. */
5858
5859 case R_PPC64_REL30:
5860 case R_PPC64_REL32:
5861 case R_PPC64_REL64:
5862 case R_PPC64_ADDR32:
5863 case R_PPC64_UADDR16:
5864 case R_PPC64_UADDR32:
5865 case R_PPC64_UADDR64:
5866 case R_PPC64_TOC:
5867 if (h != NULL && !bfd_link_pic (info))
5868 /* We may need a copy reloc. */
5869 h->non_got_ref = 1;
5870
5871 /* Don't propagate .opd relocs. */
5872 if (NO_OPD_RELOCS && opd_sym_map != NULL)
5873 break;
5874
5875 /* If we are creating a shared library, and this is a reloc
5876 against a global symbol, or a non PC relative reloc
5877 against a local symbol, then we need to copy the reloc
5878 into the shared library. However, if we are linking with
5879 -Bsymbolic, we do not need to copy a reloc against a
5880 global symbol which is defined in an object we are
5881 including in the link (i.e., DEF_REGULAR is set). At
5882 this point we have not seen all the input files, so it is
5883 possible that DEF_REGULAR is not set now but will be set
5884 later (it is never cleared). In case of a weak definition,
5885 DEF_REGULAR may be cleared later by a strong definition in
5886 a shared library. We account for that possibility below by
5887 storing information in the dyn_relocs field of the hash
5888 table entry. A similar situation occurs when creating
5889 shared libraries and symbol visibility changes render the
5890 symbol local.
5891
5892 If on the other hand, we are creating an executable, we
5893 may need to keep relocations for symbols satisfied by a
5894 dynamic library if we manage to avoid copy relocs for the
5895 symbol. */
5896 dodyn:
5897 if ((bfd_link_pic (info)
5898 && (must_be_dyn_reloc (info, r_type)
5899 || (h != NULL
5900 && (!SYMBOLIC_BIND (info, h)
5901 || h->root.type == bfd_link_hash_defweak
5902 || !h->def_regular))))
5903 || (ELIMINATE_COPY_RELOCS
5904 && !bfd_link_pic (info)
5905 && h != NULL
5906 && (h->root.type == bfd_link_hash_defweak
5907 || !h->def_regular))
5908 || (!bfd_link_pic (info)
5909 && ifunc != NULL))
5910 {
5911 /* We must copy these reloc types into the output file.
5912 Create a reloc section in dynobj and make room for
5913 this reloc. */
5914 if (sreloc == NULL)
5915 {
5916 sreloc = _bfd_elf_make_dynamic_reloc_section
5917 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
5918
5919 if (sreloc == NULL)
5920 return FALSE;
5921 }
5922
5923 /* If this is a global symbol, we count the number of
5924 relocations we need for this symbol. */
5925 if (h != NULL)
5926 {
5927 struct elf_dyn_relocs *p;
5928 struct elf_dyn_relocs **head;
5929
5930 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
5931 p = *head;
5932 if (p == NULL || p->sec != sec)
5933 {
5934 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5935 if (p == NULL)
5936 return FALSE;
5937 p->next = *head;
5938 *head = p;
5939 p->sec = sec;
5940 p->count = 0;
5941 p->pc_count = 0;
5942 }
5943 p->count += 1;
5944 if (!must_be_dyn_reloc (info, r_type))
5945 p->pc_count += 1;
5946 }
5947 else
5948 {
5949 /* Track dynamic relocs needed for local syms too.
5950 We really need local syms available to do this
5951 easily. Oh well. */
5952 struct ppc_dyn_relocs *p;
5953 struct ppc_dyn_relocs **head;
5954 bfd_boolean is_ifunc;
5955 asection *s;
5956 void *vpp;
5957 Elf_Internal_Sym *isym;
5958
5959 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5960 abfd, r_symndx);
5961 if (isym == NULL)
5962 return FALSE;
5963
5964 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5965 if (s == NULL)
5966 s = sec;
5967
5968 vpp = &elf_section_data (s)->local_dynrel;
5969 head = (struct ppc_dyn_relocs **) vpp;
5970 is_ifunc = ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC;
5971 p = *head;
5972 if (p != NULL && p->sec == sec && p->ifunc != is_ifunc)
5973 p = p->next;
5974 if (p == NULL || p->sec != sec || p->ifunc != is_ifunc)
5975 {
5976 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5977 if (p == NULL)
5978 return FALSE;
5979 p->next = *head;
5980 *head = p;
5981 p->sec = sec;
5982 p->ifunc = is_ifunc;
5983 p->count = 0;
5984 }
5985 p->count += 1;
5986 }
5987 }
5988 break;
5989
5990 default:
5991 break;
5992 }
5993 }
5994
5995 return TRUE;
5996 }
5997
5998 /* Merge backend specific data from an object file to the output
5999 object file when linking. */
6000
6001 static bfd_boolean
6002 ppc64_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
6003 {
6004 bfd *obfd = info->output_bfd;
6005 unsigned long iflags, oflags;
6006
6007 if ((ibfd->flags & BFD_LINKER_CREATED) != 0)
6008 return TRUE;
6009
6010 if (!is_ppc64_elf (ibfd) || !is_ppc64_elf (obfd))
6011 return TRUE;
6012
6013 if (!_bfd_generic_verify_endian_match (ibfd, info))
6014 return FALSE;
6015
6016 iflags = elf_elfheader (ibfd)->e_flags;
6017 oflags = elf_elfheader (obfd)->e_flags;
6018
6019 if (iflags & ~EF_PPC64_ABI)
6020 {
6021 _bfd_error_handler
6022 (_("%B uses unknown e_flags 0x%lx"), ibfd, iflags);
6023 bfd_set_error (bfd_error_bad_value);
6024 return FALSE;
6025 }
6026 else if (iflags != oflags && iflags != 0)
6027 {
6028 _bfd_error_handler
6029 (_("%B: ABI version %ld is not compatible with ABI version %ld output"),
6030 ibfd, iflags, oflags);
6031 bfd_set_error (bfd_error_bad_value);
6032 return FALSE;
6033 }
6034
6035 _bfd_elf_ppc_merge_fp_attributes (ibfd, info);
6036
6037 /* Merge Tag_compatibility attributes and any common GNU ones. */
6038 _bfd_elf_merge_object_attributes (ibfd, info);
6039
6040 return TRUE;
6041 }
6042
6043 static bfd_boolean
6044 ppc64_elf_print_private_bfd_data (bfd *abfd, void *ptr)
6045 {
6046 /* Print normal ELF private data. */
6047 _bfd_elf_print_private_bfd_data (abfd, ptr);
6048
6049 if (elf_elfheader (abfd)->e_flags != 0)
6050 {
6051 FILE *file = ptr;
6052
6053 /* xgettext:c-format */
6054 fprintf (file, _("private flags = 0x%lx:"),
6055 elf_elfheader (abfd)->e_flags);
6056
6057 if ((elf_elfheader (abfd)->e_flags & EF_PPC64_ABI) != 0)
6058 fprintf (file, _(" [abiv%ld]"),
6059 elf_elfheader (abfd)->e_flags & EF_PPC64_ABI);
6060 fputc ('\n', file);
6061 }
6062
6063 return TRUE;
6064 }
6065
6066 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
6067 of the code entry point, and its section, which must be in the same
6068 object as OPD_SEC. Returns (bfd_vma) -1 on error. */
6069
6070 static bfd_vma
6071 opd_entry_value (asection *opd_sec,
6072 bfd_vma offset,
6073 asection **code_sec,
6074 bfd_vma *code_off,
6075 bfd_boolean in_code_sec)
6076 {
6077 bfd *opd_bfd = opd_sec->owner;
6078 Elf_Internal_Rela *relocs;
6079 Elf_Internal_Rela *lo, *hi, *look;
6080 bfd_vma val;
6081
6082 /* No relocs implies we are linking a --just-symbols object, or looking
6083 at a final linked executable with addr2line or somesuch. */
6084 if (opd_sec->reloc_count == 0)
6085 {
6086 bfd_byte *contents = ppc64_elf_tdata (opd_bfd)->opd.contents;
6087
6088 if (contents == NULL)
6089 {
6090 if (!bfd_malloc_and_get_section (opd_bfd, opd_sec, &contents))
6091 return (bfd_vma) -1;
6092 ppc64_elf_tdata (opd_bfd)->opd.contents = contents;
6093 }
6094
6095 /* PR 17512: file: 64b9dfbb. */
6096 if (offset + 7 >= opd_sec->size || offset + 7 < offset)
6097 return (bfd_vma) -1;
6098
6099 val = bfd_get_64 (opd_bfd, contents + offset);
6100 if (code_sec != NULL)
6101 {
6102 asection *sec, *likely = NULL;
6103
6104 if (in_code_sec)
6105 {
6106 sec = *code_sec;
6107 if (sec->vma <= val
6108 && val < sec->vma + sec->size)
6109 likely = sec;
6110 else
6111 val = -1;
6112 }
6113 else
6114 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
6115 if (sec->vma <= val
6116 && (sec->flags & SEC_LOAD) != 0
6117 && (sec->flags & SEC_ALLOC) != 0)
6118 likely = sec;
6119 if (likely != NULL)
6120 {
6121 *code_sec = likely;
6122 if (code_off != NULL)
6123 *code_off = val - likely->vma;
6124 }
6125 }
6126 return val;
6127 }
6128
6129 BFD_ASSERT (is_ppc64_elf (opd_bfd));
6130
6131 relocs = ppc64_elf_tdata (opd_bfd)->opd.relocs;
6132 if (relocs == NULL)
6133 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
6134 /* PR 17512: file: df8e1fd6. */
6135 if (relocs == NULL)
6136 return (bfd_vma) -1;
6137
6138 /* Go find the opd reloc at the sym address. */
6139 lo = relocs;
6140 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
6141 val = (bfd_vma) -1;
6142 while (lo < hi)
6143 {
6144 look = lo + (hi - lo) / 2;
6145 if (look->r_offset < offset)
6146 lo = look + 1;
6147 else if (look->r_offset > offset)
6148 hi = look;
6149 else
6150 {
6151 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (opd_bfd);
6152
6153 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
6154 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
6155 {
6156 unsigned long symndx = ELF64_R_SYM (look->r_info);
6157 asection *sec = NULL;
6158
6159 if (symndx >= symtab_hdr->sh_info
6160 && elf_sym_hashes (opd_bfd) != NULL)
6161 {
6162 struct elf_link_hash_entry **sym_hashes;
6163 struct elf_link_hash_entry *rh;
6164
6165 sym_hashes = elf_sym_hashes (opd_bfd);
6166 rh = sym_hashes[symndx - symtab_hdr->sh_info];
6167 if (rh != NULL)
6168 {
6169 rh = elf_follow_link (rh);
6170 if (rh->root.type != bfd_link_hash_defined
6171 && rh->root.type != bfd_link_hash_defweak)
6172 break;
6173 if (rh->root.u.def.section->owner == opd_bfd)
6174 {
6175 val = rh->root.u.def.value;
6176 sec = rh->root.u.def.section;
6177 }
6178 }
6179 }
6180
6181 if (sec == NULL)
6182 {
6183 Elf_Internal_Sym *sym;
6184
6185 if (symndx < symtab_hdr->sh_info)
6186 {
6187 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
6188 if (sym == NULL)
6189 {
6190 size_t symcnt = symtab_hdr->sh_info;
6191 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
6192 symcnt, 0,
6193 NULL, NULL, NULL);
6194 if (sym == NULL)
6195 break;
6196 symtab_hdr->contents = (bfd_byte *) sym;
6197 }
6198 sym += symndx;
6199 }
6200 else
6201 {
6202 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
6203 1, symndx,
6204 NULL, NULL, NULL);
6205 if (sym == NULL)
6206 break;
6207 }
6208 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
6209 if (sec == NULL)
6210 break;
6211 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
6212 val = sym->st_value;
6213 }
6214
6215 val += look->r_addend;
6216 if (code_off != NULL)
6217 *code_off = val;
6218 if (code_sec != NULL)
6219 {
6220 if (in_code_sec && *code_sec != sec)
6221 return -1;
6222 else
6223 *code_sec = sec;
6224 }
6225 if (sec->output_section != NULL)
6226 val += sec->output_section->vma + sec->output_offset;
6227 }
6228 break;
6229 }
6230 }
6231
6232 return val;
6233 }
6234
6235 /* If the ELF symbol SYM might be a function in SEC, return the
6236 function size and set *CODE_OFF to the function's entry point,
6237 otherwise return zero. */
6238
6239 static bfd_size_type
6240 ppc64_elf_maybe_function_sym (const asymbol *sym, asection *sec,
6241 bfd_vma *code_off)
6242 {
6243 bfd_size_type size;
6244
6245 if ((sym->flags & (BSF_SECTION_SYM | BSF_FILE | BSF_OBJECT
6246 | BSF_THREAD_LOCAL | BSF_RELC | BSF_SRELC)) != 0)
6247 return 0;
6248
6249 size = 0;
6250 if (!(sym->flags & BSF_SYNTHETIC))
6251 size = ((elf_symbol_type *) sym)->internal_elf_sym.st_size;
6252
6253 if (strcmp (sym->section->name, ".opd") == 0)
6254 {
6255 struct _opd_sec_data *opd = get_opd_info (sym->section);
6256 bfd_vma symval = sym->value;
6257
6258 if (opd != NULL
6259 && opd->adjust != NULL
6260 && elf_section_data (sym->section)->relocs != NULL)
6261 {
6262 /* opd_entry_value will use cached relocs that have been
6263 adjusted, but with raw symbols. That means both local
6264 and global symbols need adjusting. */
6265 long adjust = opd->adjust[OPD_NDX (symval)];
6266 if (adjust == -1)
6267 return 0;
6268 symval += adjust;
6269 }
6270
6271 if (opd_entry_value (sym->section, symval,
6272 &sec, code_off, TRUE) == (bfd_vma) -1)
6273 return 0;
6274 /* An old ABI binary with dot-syms has a size of 24 on the .opd
6275 symbol. This size has nothing to do with the code size of the
6276 function, which is what we're supposed to return, but the
6277 code size isn't available without looking up the dot-sym.
6278 However, doing that would be a waste of time particularly
6279 since elf_find_function will look at the dot-sym anyway.
6280 Now, elf_find_function will keep the largest size of any
6281 function sym found at the code address of interest, so return
6282 1 here to avoid it incorrectly caching a larger function size
6283 for a small function. This does mean we return the wrong
6284 size for a new-ABI function of size 24, but all that does is
6285 disable caching for such functions. */
6286 if (size == 24)
6287 size = 1;
6288 }
6289 else
6290 {
6291 if (sym->section != sec)
6292 return 0;
6293 *code_off = sym->value;
6294 }
6295 if (size == 0)
6296 size = 1;
6297 return size;
6298 }
6299
6300 /* Return true if symbol is defined in a regular object file. */
6301
6302 static bfd_boolean
6303 is_static_defined (struct elf_link_hash_entry *h)
6304 {
6305 return ((h->root.type == bfd_link_hash_defined
6306 || h->root.type == bfd_link_hash_defweak)
6307 && h->root.u.def.section != NULL
6308 && h->root.u.def.section->output_section != NULL);
6309 }
6310
6311 /* If FDH is a function descriptor symbol, return the associated code
6312 entry symbol if it is defined. Return NULL otherwise. */
6313
6314 static struct ppc_link_hash_entry *
6315 defined_code_entry (struct ppc_link_hash_entry *fdh)
6316 {
6317 if (fdh->is_func_descriptor)
6318 {
6319 struct ppc_link_hash_entry *fh = ppc_follow_link (fdh->oh);
6320 if (fh->elf.root.type == bfd_link_hash_defined
6321 || fh->elf.root.type == bfd_link_hash_defweak)
6322 return fh;
6323 }
6324 return NULL;
6325 }
6326
6327 /* If FH is a function code entry symbol, return the associated
6328 function descriptor symbol if it is defined. Return NULL otherwise. */
6329
6330 static struct ppc_link_hash_entry *
6331 defined_func_desc (struct ppc_link_hash_entry *fh)
6332 {
6333 if (fh->oh != NULL
6334 && fh->oh->is_func_descriptor)
6335 {
6336 struct ppc_link_hash_entry *fdh = ppc_follow_link (fh->oh);
6337 if (fdh->elf.root.type == bfd_link_hash_defined
6338 || fdh->elf.root.type == bfd_link_hash_defweak)
6339 return fdh;
6340 }
6341 return NULL;
6342 }
6343
6344 /* Mark all our entry sym sections, both opd and code section. */
6345
6346 static void
6347 ppc64_elf_gc_keep (struct bfd_link_info *info)
6348 {
6349 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6350 struct bfd_sym_chain *sym;
6351
6352 if (htab == NULL)
6353 return;
6354
6355 for (sym = info->gc_sym_list; sym != NULL; sym = sym->next)
6356 {
6357 struct ppc_link_hash_entry *eh, *fh;
6358 asection *sec;
6359
6360 eh = (struct ppc_link_hash_entry *)
6361 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, TRUE);
6362 if (eh == NULL)
6363 continue;
6364 if (eh->elf.root.type != bfd_link_hash_defined
6365 && eh->elf.root.type != bfd_link_hash_defweak)
6366 continue;
6367
6368 fh = defined_code_entry (eh);
6369 if (fh != NULL)
6370 {
6371 sec = fh->elf.root.u.def.section;
6372 sec->flags |= SEC_KEEP;
6373 }
6374 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6375 && opd_entry_value (eh->elf.root.u.def.section,
6376 eh->elf.root.u.def.value,
6377 &sec, NULL, FALSE) != (bfd_vma) -1)
6378 sec->flags |= SEC_KEEP;
6379
6380 sec = eh->elf.root.u.def.section;
6381 sec->flags |= SEC_KEEP;
6382 }
6383 }
6384
6385 /* Mark sections containing dynamically referenced symbols. When
6386 building shared libraries, we must assume that any visible symbol is
6387 referenced. */
6388
6389 static bfd_boolean
6390 ppc64_elf_gc_mark_dynamic_ref (struct elf_link_hash_entry *h, void *inf)
6391 {
6392 struct bfd_link_info *info = (struct bfd_link_info *) inf;
6393 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
6394 struct ppc_link_hash_entry *fdh;
6395 struct bfd_elf_dynamic_list *d = info->dynamic_list;
6396
6397 /* Dynamic linking info is on the func descriptor sym. */
6398 fdh = defined_func_desc (eh);
6399 if (fdh != NULL)
6400 eh = fdh;
6401
6402 if ((eh->elf.root.type == bfd_link_hash_defined
6403 || eh->elf.root.type == bfd_link_hash_defweak)
6404 && (eh->elf.ref_dynamic
6405 || ((eh->elf.def_regular || ELF_COMMON_DEF_P (&eh->elf))
6406 && ELF_ST_VISIBILITY (eh->elf.other) != STV_INTERNAL
6407 && ELF_ST_VISIBILITY (eh->elf.other) != STV_HIDDEN
6408 && (!bfd_link_executable (info)
6409 || info->export_dynamic
6410 || (eh->elf.dynamic
6411 && d != NULL
6412 && (*d->match) (&d->head, NULL, eh->elf.root.root.string)))
6413 && (strchr (eh->elf.root.root.string, ELF_VER_CHR) != NULL
6414 || !bfd_hide_sym_by_version (info->version_info,
6415 eh->elf.root.root.string)))))
6416 {
6417 asection *code_sec;
6418 struct ppc_link_hash_entry *fh;
6419
6420 eh->elf.root.u.def.section->flags |= SEC_KEEP;
6421
6422 /* Function descriptor syms cause the associated
6423 function code sym section to be marked. */
6424 fh = defined_code_entry (eh);
6425 if (fh != NULL)
6426 {
6427 code_sec = fh->elf.root.u.def.section;
6428 code_sec->flags |= SEC_KEEP;
6429 }
6430 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6431 && opd_entry_value (eh->elf.root.u.def.section,
6432 eh->elf.root.u.def.value,
6433 &code_sec, NULL, FALSE) != (bfd_vma) -1)
6434 code_sec->flags |= SEC_KEEP;
6435 }
6436
6437 return TRUE;
6438 }
6439
6440 /* Return the section that should be marked against GC for a given
6441 relocation. */
6442
6443 static asection *
6444 ppc64_elf_gc_mark_hook (asection *sec,
6445 struct bfd_link_info *info,
6446 Elf_Internal_Rela *rel,
6447 struct elf_link_hash_entry *h,
6448 Elf_Internal_Sym *sym)
6449 {
6450 asection *rsec;
6451
6452 /* Syms return NULL if we're marking .opd, so we avoid marking all
6453 function sections, as all functions are referenced in .opd. */
6454 rsec = NULL;
6455 if (get_opd_info (sec) != NULL)
6456 return rsec;
6457
6458 if (h != NULL)
6459 {
6460 enum elf_ppc64_reloc_type r_type;
6461 struct ppc_link_hash_entry *eh, *fh, *fdh;
6462
6463 r_type = ELF64_R_TYPE (rel->r_info);
6464 switch (r_type)
6465 {
6466 case R_PPC64_GNU_VTINHERIT:
6467 case R_PPC64_GNU_VTENTRY:
6468 break;
6469
6470 default:
6471 switch (h->root.type)
6472 {
6473 case bfd_link_hash_defined:
6474 case bfd_link_hash_defweak:
6475 eh = (struct ppc_link_hash_entry *) h;
6476 fdh = defined_func_desc (eh);
6477 if (fdh != NULL)
6478 eh = fdh;
6479
6480 /* Function descriptor syms cause the associated
6481 function code sym section to be marked. */
6482 fh = defined_code_entry (eh);
6483 if (fh != NULL)
6484 {
6485 /* They also mark their opd section. */
6486 eh->elf.root.u.def.section->gc_mark = 1;
6487
6488 rsec = fh->elf.root.u.def.section;
6489 }
6490 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6491 && opd_entry_value (eh->elf.root.u.def.section,
6492 eh->elf.root.u.def.value,
6493 &rsec, NULL, FALSE) != (bfd_vma) -1)
6494 eh->elf.root.u.def.section->gc_mark = 1;
6495 else
6496 rsec = h->root.u.def.section;
6497 break;
6498
6499 case bfd_link_hash_common:
6500 rsec = h->root.u.c.p->section;
6501 break;
6502
6503 default:
6504 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
6505 }
6506 }
6507 }
6508 else
6509 {
6510 struct _opd_sec_data *opd;
6511
6512 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
6513 opd = get_opd_info (rsec);
6514 if (opd != NULL && opd->func_sec != NULL)
6515 {
6516 rsec->gc_mark = 1;
6517
6518 rsec = opd->func_sec[OPD_NDX (sym->st_value + rel->r_addend)];
6519 }
6520 }
6521
6522 return rsec;
6523 }
6524
6525 /* Update the .got, .plt. and dynamic reloc reference counts for the
6526 section being removed. */
6527
6528 static bfd_boolean
6529 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
6530 asection *sec, const Elf_Internal_Rela *relocs)
6531 {
6532 struct ppc_link_hash_table *htab;
6533 Elf_Internal_Shdr *symtab_hdr;
6534 struct elf_link_hash_entry **sym_hashes;
6535 struct got_entry **local_got_ents;
6536 const Elf_Internal_Rela *rel, *relend;
6537
6538 if (bfd_link_relocatable (info))
6539 return TRUE;
6540
6541 if ((sec->flags & SEC_ALLOC) == 0)
6542 return TRUE;
6543
6544 elf_section_data (sec)->local_dynrel = NULL;
6545
6546 htab = ppc_hash_table (info);
6547 if (htab == NULL)
6548 return FALSE;
6549
6550 symtab_hdr = &elf_symtab_hdr (abfd);
6551 sym_hashes = elf_sym_hashes (abfd);
6552 local_got_ents = elf_local_got_ents (abfd);
6553
6554 relend = relocs + sec->reloc_count;
6555 for (rel = relocs; rel < relend; rel++)
6556 {
6557 unsigned long r_symndx;
6558 enum elf_ppc64_reloc_type r_type;
6559 struct elf_link_hash_entry *h = NULL;
6560 struct plt_entry **plt_list;
6561 unsigned char tls_type = 0;
6562
6563 r_symndx = ELF64_R_SYM (rel->r_info);
6564 r_type = ELF64_R_TYPE (rel->r_info);
6565 if (r_symndx >= symtab_hdr->sh_info)
6566 {
6567 struct ppc_link_hash_entry *eh;
6568 struct elf_dyn_relocs **pp;
6569 struct elf_dyn_relocs *p;
6570
6571 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
6572 h = elf_follow_link (h);
6573 eh = (struct ppc_link_hash_entry *) h;
6574
6575 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
6576 if (p->sec == sec)
6577 {
6578 /* Everything must go for SEC. */
6579 *pp = p->next;
6580 break;
6581 }
6582 }
6583
6584 switch (r_type)
6585 {
6586 case R_PPC64_GOT_TLSLD16:
6587 case R_PPC64_GOT_TLSLD16_LO:
6588 case R_PPC64_GOT_TLSLD16_HI:
6589 case R_PPC64_GOT_TLSLD16_HA:
6590 tls_type = TLS_TLS | TLS_LD;
6591 goto dogot;
6592
6593 case R_PPC64_GOT_TLSGD16:
6594 case R_PPC64_GOT_TLSGD16_LO:
6595 case R_PPC64_GOT_TLSGD16_HI:
6596 case R_PPC64_GOT_TLSGD16_HA:
6597 tls_type = TLS_TLS | TLS_GD;
6598 goto dogot;
6599
6600 case R_PPC64_GOT_TPREL16_DS:
6601 case R_PPC64_GOT_TPREL16_LO_DS:
6602 case R_PPC64_GOT_TPREL16_HI:
6603 case R_PPC64_GOT_TPREL16_HA:
6604 tls_type = TLS_TLS | TLS_TPREL;
6605 goto dogot;
6606
6607 case R_PPC64_GOT_DTPREL16_DS:
6608 case R_PPC64_GOT_DTPREL16_LO_DS:
6609 case R_PPC64_GOT_DTPREL16_HI:
6610 case R_PPC64_GOT_DTPREL16_HA:
6611 tls_type = TLS_TLS | TLS_DTPREL;
6612 goto dogot;
6613
6614 case R_PPC64_GOT16:
6615 case R_PPC64_GOT16_DS:
6616 case R_PPC64_GOT16_HA:
6617 case R_PPC64_GOT16_HI:
6618 case R_PPC64_GOT16_LO:
6619 case R_PPC64_GOT16_LO_DS:
6620 dogot:
6621 {
6622 struct got_entry *ent;
6623
6624 if (h != NULL)
6625 ent = h->got.glist;
6626 else
6627 ent = local_got_ents[r_symndx];
6628
6629 for (; ent != NULL; ent = ent->next)
6630 if (ent->addend == rel->r_addend
6631 && ent->owner == abfd
6632 && ent->tls_type == tls_type)
6633 break;
6634 if (ent == NULL)
6635 abort ();
6636 if (ent->got.refcount > 0)
6637 ent->got.refcount -= 1;
6638 }
6639 break;
6640
6641 case R_PPC64_PLT16_HA:
6642 case R_PPC64_PLT16_HI:
6643 case R_PPC64_PLT16_LO:
6644 case R_PPC64_PLT32:
6645 case R_PPC64_PLT64:
6646 case R_PPC64_REL14:
6647 case R_PPC64_REL14_BRNTAKEN:
6648 case R_PPC64_REL14_BRTAKEN:
6649 case R_PPC64_REL24:
6650 plt_list = NULL;
6651 if (h != NULL)
6652 plt_list = &h->plt.plist;
6653 else if (local_got_ents != NULL)
6654 {
6655 struct plt_entry **local_plt = (struct plt_entry **)
6656 (local_got_ents + symtab_hdr->sh_info);
6657 unsigned char *local_got_tls_masks = (unsigned char *)
6658 (local_plt + symtab_hdr->sh_info);
6659 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
6660 plt_list = local_plt + r_symndx;
6661 }
6662 if (plt_list)
6663 {
6664 struct plt_entry *ent;
6665
6666 for (ent = *plt_list; ent != NULL; ent = ent->next)
6667 if (ent->addend == rel->r_addend)
6668 break;
6669 if (ent != NULL && ent->plt.refcount > 0)
6670 ent->plt.refcount -= 1;
6671 }
6672 break;
6673
6674 default:
6675 break;
6676 }
6677 }
6678 return TRUE;
6679 }
6680
6681 /* The maximum size of .sfpr. */
6682 #define SFPR_MAX (218*4)
6683
6684 struct sfpr_def_parms
6685 {
6686 const char name[12];
6687 unsigned char lo, hi;
6688 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
6689 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
6690 };
6691
6692 /* Auto-generate _save*, _rest* functions in .sfpr.
6693 If STUB_SEC is non-null, define alias symbols in STUB_SEC
6694 instead. */
6695
6696 static bfd_boolean
6697 sfpr_define (struct bfd_link_info *info,
6698 const struct sfpr_def_parms *parm,
6699 asection *stub_sec)
6700 {
6701 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6702 unsigned int i;
6703 size_t len = strlen (parm->name);
6704 bfd_boolean writing = FALSE;
6705 char sym[16];
6706
6707 if (htab == NULL)
6708 return FALSE;
6709
6710 memcpy (sym, parm->name, len);
6711 sym[len + 2] = 0;
6712
6713 for (i = parm->lo; i <= parm->hi; i++)
6714 {
6715 struct ppc_link_hash_entry *h;
6716
6717 sym[len + 0] = i / 10 + '0';
6718 sym[len + 1] = i % 10 + '0';
6719 h = (struct ppc_link_hash_entry *)
6720 elf_link_hash_lookup (&htab->elf, sym, writing, TRUE, TRUE);
6721 if (stub_sec != NULL)
6722 {
6723 if (h != NULL
6724 && h->elf.root.type == bfd_link_hash_defined
6725 && h->elf.root.u.def.section == htab->sfpr)
6726 {
6727 struct elf_link_hash_entry *s;
6728 char buf[32];
6729 sprintf (buf, "%08x.%s", stub_sec->id & 0xffffffff, sym);
6730 s = elf_link_hash_lookup (&htab->elf, buf, TRUE, TRUE, FALSE);
6731 if (s == NULL)
6732 return FALSE;
6733 if (s->root.type == bfd_link_hash_new
6734 || (s->root.type = bfd_link_hash_defined
6735 && s->root.u.def.section == stub_sec))
6736 {
6737 s->root.type = bfd_link_hash_defined;
6738 s->root.u.def.section = stub_sec;
6739 s->root.u.def.value = (stub_sec->size
6740 + h->elf.root.u.def.value);
6741 s->ref_regular = 1;
6742 s->def_regular = 1;
6743 s->ref_regular_nonweak = 1;
6744 s->forced_local = 1;
6745 s->non_elf = 0;
6746 s->root.linker_def = 1;
6747 }
6748 }
6749 continue;
6750 }
6751 if (h != NULL)
6752 {
6753 h->save_res = 1;
6754 if (!h->elf.def_regular)
6755 {
6756 h->elf.root.type = bfd_link_hash_defined;
6757 h->elf.root.u.def.section = htab->sfpr;
6758 h->elf.root.u.def.value = htab->sfpr->size;
6759 h->elf.type = STT_FUNC;
6760 h->elf.def_regular = 1;
6761 h->elf.non_elf = 0;
6762 _bfd_elf_link_hash_hide_symbol (info, &h->elf, TRUE);
6763 writing = TRUE;
6764 if (htab->sfpr->contents == NULL)
6765 {
6766 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
6767 if (htab->sfpr->contents == NULL)
6768 return FALSE;
6769 }
6770 }
6771 }
6772 if (writing)
6773 {
6774 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
6775 if (i != parm->hi)
6776 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
6777 else
6778 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
6779 htab->sfpr->size = p - htab->sfpr->contents;
6780 }
6781 }
6782
6783 return TRUE;
6784 }
6785
6786 static bfd_byte *
6787 savegpr0 (bfd *abfd, bfd_byte *p, int r)
6788 {
6789 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6790 return p + 4;
6791 }
6792
6793 static bfd_byte *
6794 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
6795 {
6796 p = savegpr0 (abfd, p, r);
6797 bfd_put_32 (abfd, STD_R0_0R1 + STK_LR, p);
6798 p = p + 4;
6799 bfd_put_32 (abfd, BLR, p);
6800 return p + 4;
6801 }
6802
6803 static bfd_byte *
6804 restgpr0 (bfd *abfd, bfd_byte *p, int r)
6805 {
6806 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6807 return p + 4;
6808 }
6809
6810 static bfd_byte *
6811 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
6812 {
6813 bfd_put_32 (abfd, LD_R0_0R1 + STK_LR, p);
6814 p = p + 4;
6815 p = restgpr0 (abfd, p, r);
6816 bfd_put_32 (abfd, MTLR_R0, p);
6817 p = p + 4;
6818 if (r == 29)
6819 {
6820 p = restgpr0 (abfd, p, 30);
6821 p = restgpr0 (abfd, p, 31);
6822 }
6823 bfd_put_32 (abfd, BLR, p);
6824 return p + 4;
6825 }
6826
6827 static bfd_byte *
6828 savegpr1 (bfd *abfd, bfd_byte *p, int r)
6829 {
6830 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6831 return p + 4;
6832 }
6833
6834 static bfd_byte *
6835 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
6836 {
6837 p = savegpr1 (abfd, p, r);
6838 bfd_put_32 (abfd, BLR, p);
6839 return p + 4;
6840 }
6841
6842 static bfd_byte *
6843 restgpr1 (bfd *abfd, bfd_byte *p, int r)
6844 {
6845 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6846 return p + 4;
6847 }
6848
6849 static bfd_byte *
6850 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
6851 {
6852 p = restgpr1 (abfd, p, r);
6853 bfd_put_32 (abfd, BLR, p);
6854 return p + 4;
6855 }
6856
6857 static bfd_byte *
6858 savefpr (bfd *abfd, bfd_byte *p, int r)
6859 {
6860 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6861 return p + 4;
6862 }
6863
6864 static bfd_byte *
6865 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
6866 {
6867 p = savefpr (abfd, p, r);
6868 bfd_put_32 (abfd, STD_R0_0R1 + STK_LR, p);
6869 p = p + 4;
6870 bfd_put_32 (abfd, BLR, p);
6871 return p + 4;
6872 }
6873
6874 static bfd_byte *
6875 restfpr (bfd *abfd, bfd_byte *p, int r)
6876 {
6877 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6878 return p + 4;
6879 }
6880
6881 static bfd_byte *
6882 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
6883 {
6884 bfd_put_32 (abfd, LD_R0_0R1 + STK_LR, p);
6885 p = p + 4;
6886 p = restfpr (abfd, p, r);
6887 bfd_put_32 (abfd, MTLR_R0, p);
6888 p = p + 4;
6889 if (r == 29)
6890 {
6891 p = restfpr (abfd, p, 30);
6892 p = restfpr (abfd, p, 31);
6893 }
6894 bfd_put_32 (abfd, BLR, p);
6895 return p + 4;
6896 }
6897
6898 static bfd_byte *
6899 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
6900 {
6901 p = savefpr (abfd, p, r);
6902 bfd_put_32 (abfd, BLR, p);
6903 return p + 4;
6904 }
6905
6906 static bfd_byte *
6907 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
6908 {
6909 p = restfpr (abfd, p, r);
6910 bfd_put_32 (abfd, BLR, p);
6911 return p + 4;
6912 }
6913
6914 static bfd_byte *
6915 savevr (bfd *abfd, bfd_byte *p, int r)
6916 {
6917 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6918 p = p + 4;
6919 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
6920 return p + 4;
6921 }
6922
6923 static bfd_byte *
6924 savevr_tail (bfd *abfd, bfd_byte *p, int r)
6925 {
6926 p = savevr (abfd, p, r);
6927 bfd_put_32 (abfd, BLR, p);
6928 return p + 4;
6929 }
6930
6931 static bfd_byte *
6932 restvr (bfd *abfd, bfd_byte *p, int r)
6933 {
6934 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6935 p = p + 4;
6936 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
6937 return p + 4;
6938 }
6939
6940 static bfd_byte *
6941 restvr_tail (bfd *abfd, bfd_byte *p, int r)
6942 {
6943 p = restvr (abfd, p, r);
6944 bfd_put_32 (abfd, BLR, p);
6945 return p + 4;
6946 }
6947
6948 /* Called via elf_link_hash_traverse to transfer dynamic linking
6949 information on function code symbol entries to their corresponding
6950 function descriptor symbol entries. */
6951
6952 static bfd_boolean
6953 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
6954 {
6955 struct bfd_link_info *info;
6956 struct ppc_link_hash_table *htab;
6957 struct plt_entry *ent;
6958 struct ppc_link_hash_entry *fh;
6959 struct ppc_link_hash_entry *fdh;
6960 bfd_boolean force_local;
6961
6962 fh = (struct ppc_link_hash_entry *) h;
6963 if (fh->elf.root.type == bfd_link_hash_indirect)
6964 return TRUE;
6965
6966 info = inf;
6967 htab = ppc_hash_table (info);
6968 if (htab == NULL)
6969 return FALSE;
6970
6971 /* Resolve undefined references to dot-symbols as the value
6972 in the function descriptor, if we have one in a regular object.
6973 This is to satisfy cases like ".quad .foo". Calls to functions
6974 in dynamic objects are handled elsewhere. */
6975 if (fh->elf.root.type == bfd_link_hash_undefweak
6976 && fh->was_undefined
6977 && (fdh = defined_func_desc (fh)) != NULL
6978 && get_opd_info (fdh->elf.root.u.def.section) != NULL
6979 && opd_entry_value (fdh->elf.root.u.def.section,
6980 fdh->elf.root.u.def.value,
6981 &fh->elf.root.u.def.section,
6982 &fh->elf.root.u.def.value, FALSE) != (bfd_vma) -1)
6983 {
6984 fh->elf.root.type = fdh->elf.root.type;
6985 fh->elf.forced_local = 1;
6986 fh->elf.def_regular = fdh->elf.def_regular;
6987 fh->elf.def_dynamic = fdh->elf.def_dynamic;
6988 }
6989
6990 /* If this is a function code symbol, transfer dynamic linking
6991 information to the function descriptor symbol. */
6992 if (!fh->is_func)
6993 return TRUE;
6994
6995 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
6996 if (ent->plt.refcount > 0)
6997 break;
6998 if (ent == NULL
6999 || fh->elf.root.root.string[0] != '.'
7000 || fh->elf.root.root.string[1] == '\0')
7001 return TRUE;
7002
7003 /* Find the corresponding function descriptor symbol. Create it
7004 as undefined if necessary. */
7005
7006 fdh = lookup_fdh (fh, htab);
7007 if (fdh == NULL
7008 && !bfd_link_executable (info)
7009 && (fh->elf.root.type == bfd_link_hash_undefined
7010 || fh->elf.root.type == bfd_link_hash_undefweak))
7011 {
7012 fdh = make_fdh (info, fh);
7013 if (fdh == NULL)
7014 return FALSE;
7015 }
7016
7017 /* Fake function descriptors are made undefweak. If the function
7018 code symbol is strong undefined, make the fake sym the same.
7019 If the function code symbol is defined, then force the fake
7020 descriptor local; We can't support overriding of symbols in a
7021 shared library on a fake descriptor. */
7022
7023 if (fdh != NULL
7024 && fdh->fake
7025 && fdh->elf.root.type == bfd_link_hash_undefweak)
7026 {
7027 if (fh->elf.root.type == bfd_link_hash_undefined)
7028 {
7029 fdh->elf.root.type = bfd_link_hash_undefined;
7030 bfd_link_add_undef (&htab->elf.root, &fdh->elf.root);
7031 }
7032 else if (fh->elf.root.type == bfd_link_hash_defined
7033 || fh->elf.root.type == bfd_link_hash_defweak)
7034 {
7035 _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE);
7036 }
7037 }
7038
7039 if (fdh != NULL
7040 && !fdh->elf.forced_local
7041 && (!bfd_link_executable (info)
7042 || fdh->elf.def_dynamic
7043 || fdh->elf.ref_dynamic
7044 || (fdh->elf.root.type == bfd_link_hash_undefweak
7045 && ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT)))
7046 {
7047 if (fdh->elf.dynindx == -1)
7048 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
7049 return FALSE;
7050 fdh->elf.ref_regular |= fh->elf.ref_regular;
7051 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
7052 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
7053 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
7054 if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT)
7055 {
7056 move_plt_plist (fh, fdh);
7057 fdh->elf.needs_plt = 1;
7058 }
7059 fdh->is_func_descriptor = 1;
7060 fdh->oh = fh;
7061 fh->oh = fdh;
7062 }
7063
7064 /* Now that the info is on the function descriptor, clear the
7065 function code sym info. Any function code syms for which we
7066 don't have a definition in a regular file, we force local.
7067 This prevents a shared library from exporting syms that have
7068 been imported from another library. Function code syms that
7069 are really in the library we must leave global to prevent the
7070 linker dragging in a definition from a static library. */
7071 force_local = (!fh->elf.def_regular
7072 || fdh == NULL
7073 || !fdh->elf.def_regular
7074 || fdh->elf.forced_local);
7075 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
7076
7077 return TRUE;
7078 }
7079
7080 static const struct sfpr_def_parms save_res_funcs[] =
7081 {
7082 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
7083 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
7084 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
7085 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
7086 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
7087 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
7088 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
7089 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
7090 { "._savef", 14, 31, savefpr, savefpr1_tail },
7091 { "._restf", 14, 31, restfpr, restfpr1_tail },
7092 { "_savevr_", 20, 31, savevr, savevr_tail },
7093 { "_restvr_", 20, 31, restvr, restvr_tail }
7094 };
7095
7096 /* Called near the start of bfd_elf_size_dynamic_sections. We use
7097 this hook to a) provide some gcc support functions, and b) transfer
7098 dynamic linking information gathered so far on function code symbol
7099 entries, to their corresponding function descriptor symbol entries. */
7100
7101 static bfd_boolean
7102 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
7103 struct bfd_link_info *info)
7104 {
7105 struct ppc_link_hash_table *htab;
7106
7107 htab = ppc_hash_table (info);
7108 if (htab == NULL)
7109 return FALSE;
7110
7111 /* Provide any missing _save* and _rest* functions. */
7112 if (htab->sfpr != NULL)
7113 {
7114 unsigned int i;
7115
7116 htab->sfpr->size = 0;
7117 for (i = 0; i < ARRAY_SIZE (save_res_funcs); i++)
7118 if (!sfpr_define (info, &save_res_funcs[i], NULL))
7119 return FALSE;
7120 if (htab->sfpr->size == 0)
7121 htab->sfpr->flags |= SEC_EXCLUDE;
7122 }
7123
7124 if (bfd_link_relocatable (info))
7125 return TRUE;
7126
7127 if (htab->elf.hgot != NULL)
7128 {
7129 _bfd_elf_link_hash_hide_symbol (info, htab->elf.hgot, TRUE);
7130 /* Make .TOC. defined so as to prevent it being made dynamic.
7131 The wrong value here is fixed later in ppc64_elf_set_toc. */
7132 if (!htab->elf.hgot->def_regular
7133 || htab->elf.hgot->root.type != bfd_link_hash_defined)
7134 {
7135 htab->elf.hgot->root.type = bfd_link_hash_defined;
7136 htab->elf.hgot->root.u.def.value = 0;
7137 htab->elf.hgot->root.u.def.section = bfd_abs_section_ptr;
7138 htab->elf.hgot->def_regular = 1;
7139 htab->elf.hgot->root.linker_def = 1;
7140 }
7141 htab->elf.hgot->type = STT_OBJECT;
7142 htab->elf.hgot->other = ((htab->elf.hgot->other & ~ELF_ST_VISIBILITY (-1))
7143 | STV_HIDDEN);
7144 }
7145
7146 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
7147
7148 return TRUE;
7149 }
7150
7151 /* Return true if we have dynamic relocs against H that apply to
7152 read-only sections. */
7153
7154 static bfd_boolean
7155 readonly_dynrelocs (struct elf_link_hash_entry *h)
7156 {
7157 struct ppc_link_hash_entry *eh;
7158 struct elf_dyn_relocs *p;
7159
7160 eh = (struct ppc_link_hash_entry *) h;
7161 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7162 {
7163 asection *s = p->sec->output_section;
7164
7165 if (s != NULL && (s->flags & SEC_READONLY) != 0)
7166 return TRUE;
7167 }
7168 return FALSE;
7169 }
7170
7171 /* Return true if we have dynamic relocs against H or any of its weak
7172 aliases, that apply to read-only sections. */
7173
7174 static bfd_boolean
7175 alias_readonly_dynrelocs (struct elf_link_hash_entry *h)
7176 {
7177 struct ppc_link_hash_entry *eh;
7178
7179 eh = (struct ppc_link_hash_entry *) h;
7180 do
7181 {
7182 if (readonly_dynrelocs (&eh->elf))
7183 return TRUE;
7184 eh = eh->weakref;
7185 } while (eh != NULL && &eh->elf != h);
7186
7187 return FALSE;
7188 }
7189
7190 /* Return whether EH has pc-relative dynamic relocs. */
7191
7192 static bfd_boolean
7193 pc_dynrelocs (struct ppc_link_hash_entry *eh)
7194 {
7195 struct elf_dyn_relocs *p;
7196
7197 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7198 if (p->pc_count != 0)
7199 return TRUE;
7200 return FALSE;
7201 }
7202
7203 /* Return true if a global entry stub will be created for H. Valid
7204 for ELFv2 before plt entries have been allocated. */
7205
7206 static bfd_boolean
7207 global_entry_stub (struct elf_link_hash_entry *h)
7208 {
7209 struct plt_entry *pent;
7210
7211 if (!h->pointer_equality_needed
7212 || h->def_regular)
7213 return FALSE;
7214
7215 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
7216 if (pent->plt.refcount > 0
7217 && pent->addend == 0)
7218 return TRUE;
7219
7220 return FALSE;
7221 }
7222
7223 /* Adjust a symbol defined by a dynamic object and referenced by a
7224 regular object. The current definition is in some section of the
7225 dynamic object, but we're not including those sections. We have to
7226 change the definition to something the rest of the link can
7227 understand. */
7228
7229 static bfd_boolean
7230 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
7231 struct elf_link_hash_entry *h)
7232 {
7233 struct ppc_link_hash_table *htab;
7234 asection *s;
7235
7236 htab = ppc_hash_table (info);
7237 if (htab == NULL)
7238 return FALSE;
7239
7240 /* Deal with function syms. */
7241 if (h->type == STT_FUNC
7242 || h->type == STT_GNU_IFUNC
7243 || h->needs_plt)
7244 {
7245 /* Clear procedure linkage table information for any symbol that
7246 won't need a .plt entry. */
7247 struct plt_entry *ent;
7248 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
7249 if (ent->plt.refcount > 0)
7250 break;
7251 if (ent == NULL
7252 || (h->type != STT_GNU_IFUNC
7253 && (SYMBOL_CALLS_LOCAL (info, h)
7254 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
7255 && h->root.type == bfd_link_hash_undefweak)))
7256 || ((struct ppc_link_hash_entry *) h)->save_res)
7257 {
7258 h->plt.plist = NULL;
7259 h->needs_plt = 0;
7260 h->pointer_equality_needed = 0;
7261 }
7262 else if (abiversion (info->output_bfd) >= 2)
7263 {
7264 /* Taking a function's address in a read/write section
7265 doesn't require us to define the function symbol in the
7266 executable on a global entry stub. A dynamic reloc can
7267 be used instead. The reason we prefer a few more dynamic
7268 relocs is that calling via a global entry stub costs a
7269 few more instructions, and pointer_equality_needed causes
7270 extra work in ld.so when resolving these symbols. */
7271 if (global_entry_stub (h)
7272 && !alias_readonly_dynrelocs (h))
7273 {
7274 h->pointer_equality_needed = 0;
7275 /* After adjust_dynamic_symbol, non_got_ref set in
7276 the non-pic case means that dyn_relocs for this
7277 symbol should be discarded. */
7278 h->non_got_ref = 0;
7279 }
7280
7281 /* If making a plt entry, then we don't need copy relocs. */
7282 return TRUE;
7283 }
7284 }
7285 else
7286 h->plt.plist = NULL;
7287
7288 /* If this is a weak symbol, and there is a real definition, the
7289 processor independent code will have arranged for us to see the
7290 real definition first, and we can just use the same value. */
7291 if (h->u.weakdef != NULL)
7292 {
7293 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
7294 || h->u.weakdef->root.type == bfd_link_hash_defweak);
7295 h->root.u.def.section = h->u.weakdef->root.u.def.section;
7296 h->root.u.def.value = h->u.weakdef->root.u.def.value;
7297 if (ELIMINATE_COPY_RELOCS)
7298 h->non_got_ref = h->u.weakdef->non_got_ref;
7299 return TRUE;
7300 }
7301
7302 /* If we are creating a shared library, we must presume that the
7303 only references to the symbol are via the global offset table.
7304 For such cases we need not do anything here; the relocations will
7305 be handled correctly by relocate_section. */
7306 if (bfd_link_pic (info))
7307 return TRUE;
7308
7309 /* If there are no references to this symbol that do not use the
7310 GOT, we don't need to generate a copy reloc. */
7311 if (!h->non_got_ref)
7312 return TRUE;
7313
7314 /* Don't generate a copy reloc for symbols defined in the executable. */
7315 if (!h->def_dynamic || !h->ref_regular || h->def_regular
7316
7317 /* If -z nocopyreloc was given, don't generate them either. */
7318 || info->nocopyreloc
7319
7320 /* If we didn't find any dynamic relocs in read-only sections, then
7321 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
7322 || (ELIMINATE_COPY_RELOCS && !alias_readonly_dynrelocs (h))
7323
7324 /* Protected variables do not work with .dynbss. The copy in
7325 .dynbss won't be used by the shared library with the protected
7326 definition for the variable. Text relocations are preferable
7327 to an incorrect program. */
7328 || h->protected_def)
7329 {
7330 h->non_got_ref = 0;
7331 return TRUE;
7332 }
7333
7334 if (h->plt.plist != NULL)
7335 {
7336 /* We should never get here, but unfortunately there are versions
7337 of gcc out there that improperly (for this ABI) put initialized
7338 function pointers, vtable refs and suchlike in read-only
7339 sections. Allow them to proceed, but warn that this might
7340 break at runtime. */
7341 info->callbacks->einfo
7342 (_("%P: copy reloc against `%T' requires lazy plt linking; "
7343 "avoid setting LD_BIND_NOW=1 or upgrade gcc\n"),
7344 h->root.root.string);
7345 }
7346
7347 /* This is a reference to a symbol defined by a dynamic object which
7348 is not a function. */
7349
7350 /* We must allocate the symbol in our .dynbss section, which will
7351 become part of the .bss section of the executable. There will be
7352 an entry for this symbol in the .dynsym section. The dynamic
7353 object will contain position independent code, so all references
7354 from the dynamic object to this symbol will go through the global
7355 offset table. The dynamic linker will use the .dynsym entry to
7356 determine the address it must put in the global offset table, so
7357 both the dynamic object and the regular object will refer to the
7358 same memory location for the variable. */
7359
7360 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
7361 to copy the initial value out of the dynamic object and into the
7362 runtime process image. We need to remember the offset into the
7363 .rela.bss section we are going to use. */
7364 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
7365 {
7366 htab->relbss->size += sizeof (Elf64_External_Rela);
7367 h->needs_copy = 1;
7368 }
7369
7370 s = htab->dynbss;
7371
7372 return _bfd_elf_adjust_dynamic_copy (info, h, s);
7373 }
7374
7375 /* If given a function descriptor symbol, hide both the function code
7376 sym and the descriptor. */
7377 static void
7378 ppc64_elf_hide_symbol (struct bfd_link_info *info,
7379 struct elf_link_hash_entry *h,
7380 bfd_boolean force_local)
7381 {
7382 struct ppc_link_hash_entry *eh;
7383 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
7384
7385 eh = (struct ppc_link_hash_entry *) h;
7386 if (eh->is_func_descriptor)
7387 {
7388 struct ppc_link_hash_entry *fh = eh->oh;
7389
7390 if (fh == NULL)
7391 {
7392 const char *p, *q;
7393 struct ppc_link_hash_table *htab;
7394 char save;
7395
7396 /* We aren't supposed to use alloca in BFD because on
7397 systems which do not have alloca the version in libiberty
7398 calls xmalloc, which might cause the program to crash
7399 when it runs out of memory. This function doesn't have a
7400 return status, so there's no way to gracefully return an
7401 error. So cheat. We know that string[-1] can be safely
7402 accessed; It's either a string in an ELF string table,
7403 or allocated in an objalloc structure. */
7404
7405 p = eh->elf.root.root.string - 1;
7406 save = *p;
7407 *(char *) p = '.';
7408 htab = ppc_hash_table (info);
7409 if (htab == NULL)
7410 return;
7411
7412 fh = (struct ppc_link_hash_entry *)
7413 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
7414 *(char *) p = save;
7415
7416 /* Unfortunately, if it so happens that the string we were
7417 looking for was allocated immediately before this string,
7418 then we overwrote the string terminator. That's the only
7419 reason the lookup should fail. */
7420 if (fh == NULL)
7421 {
7422 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
7423 while (q >= eh->elf.root.root.string && *q == *p)
7424 --q, --p;
7425 if (q < eh->elf.root.root.string && *p == '.')
7426 fh = (struct ppc_link_hash_entry *)
7427 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
7428 }
7429 if (fh != NULL)
7430 {
7431 eh->oh = fh;
7432 fh->oh = eh;
7433 }
7434 }
7435 if (fh != NULL)
7436 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
7437 }
7438 }
7439
7440 static bfd_boolean
7441 get_sym_h (struct elf_link_hash_entry **hp,
7442 Elf_Internal_Sym **symp,
7443 asection **symsecp,
7444 unsigned char **tls_maskp,
7445 Elf_Internal_Sym **locsymsp,
7446 unsigned long r_symndx,
7447 bfd *ibfd)
7448 {
7449 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
7450
7451 if (r_symndx >= symtab_hdr->sh_info)
7452 {
7453 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
7454 struct elf_link_hash_entry *h;
7455
7456 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
7457 h = elf_follow_link (h);
7458
7459 if (hp != NULL)
7460 *hp = h;
7461
7462 if (symp != NULL)
7463 *symp = NULL;
7464
7465 if (symsecp != NULL)
7466 {
7467 asection *symsec = NULL;
7468 if (h->root.type == bfd_link_hash_defined
7469 || h->root.type == bfd_link_hash_defweak)
7470 symsec = h->root.u.def.section;
7471 *symsecp = symsec;
7472 }
7473
7474 if (tls_maskp != NULL)
7475 {
7476 struct ppc_link_hash_entry *eh;
7477
7478 eh = (struct ppc_link_hash_entry *) h;
7479 *tls_maskp = &eh->tls_mask;
7480 }
7481 }
7482 else
7483 {
7484 Elf_Internal_Sym *sym;
7485 Elf_Internal_Sym *locsyms = *locsymsp;
7486
7487 if (locsyms == NULL)
7488 {
7489 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
7490 if (locsyms == NULL)
7491 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
7492 symtab_hdr->sh_info,
7493 0, NULL, NULL, NULL);
7494 if (locsyms == NULL)
7495 return FALSE;
7496 *locsymsp = locsyms;
7497 }
7498 sym = locsyms + r_symndx;
7499
7500 if (hp != NULL)
7501 *hp = NULL;
7502
7503 if (symp != NULL)
7504 *symp = sym;
7505
7506 if (symsecp != NULL)
7507 *symsecp = bfd_section_from_elf_index (ibfd, sym->st_shndx);
7508
7509 if (tls_maskp != NULL)
7510 {
7511 struct got_entry **lgot_ents;
7512 unsigned char *tls_mask;
7513
7514 tls_mask = NULL;
7515 lgot_ents = elf_local_got_ents (ibfd);
7516 if (lgot_ents != NULL)
7517 {
7518 struct plt_entry **local_plt = (struct plt_entry **)
7519 (lgot_ents + symtab_hdr->sh_info);
7520 unsigned char *lgot_masks = (unsigned char *)
7521 (local_plt + symtab_hdr->sh_info);
7522 tls_mask = &lgot_masks[r_symndx];
7523 }
7524 *tls_maskp = tls_mask;
7525 }
7526 }
7527 return TRUE;
7528 }
7529
7530 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
7531 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
7532 type suitable for optimization, and 1 otherwise. */
7533
7534 static int
7535 get_tls_mask (unsigned char **tls_maskp,
7536 unsigned long *toc_symndx,
7537 bfd_vma *toc_addend,
7538 Elf_Internal_Sym **locsymsp,
7539 const Elf_Internal_Rela *rel,
7540 bfd *ibfd)
7541 {
7542 unsigned long r_symndx;
7543 int next_r;
7544 struct elf_link_hash_entry *h;
7545 Elf_Internal_Sym *sym;
7546 asection *sec;
7547 bfd_vma off;
7548
7549 r_symndx = ELF64_R_SYM (rel->r_info);
7550 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
7551 return 0;
7552
7553 if ((*tls_maskp != NULL && **tls_maskp != 0)
7554 || sec == NULL
7555 || ppc64_elf_section_data (sec) == NULL
7556 || ppc64_elf_section_data (sec)->sec_type != sec_toc)
7557 return 1;
7558
7559 /* Look inside a TOC section too. */
7560 if (h != NULL)
7561 {
7562 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
7563 off = h->root.u.def.value;
7564 }
7565 else
7566 off = sym->st_value;
7567 off += rel->r_addend;
7568 BFD_ASSERT (off % 8 == 0);
7569 r_symndx = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8];
7570 next_r = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8 + 1];
7571 if (toc_symndx != NULL)
7572 *toc_symndx = r_symndx;
7573 if (toc_addend != NULL)
7574 *toc_addend = ppc64_elf_section_data (sec)->u.toc.add[off / 8];
7575 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
7576 return 0;
7577 if ((h == NULL || is_static_defined (h))
7578 && (next_r == -1 || next_r == -2))
7579 return 1 - next_r;
7580 return 1;
7581 }
7582
7583 /* Find (or create) an entry in the tocsave hash table. */
7584
7585 static struct tocsave_entry *
7586 tocsave_find (struct ppc_link_hash_table *htab,
7587 enum insert_option insert,
7588 Elf_Internal_Sym **local_syms,
7589 const Elf_Internal_Rela *irela,
7590 bfd *ibfd)
7591 {
7592 unsigned long r_indx;
7593 struct elf_link_hash_entry *h;
7594 Elf_Internal_Sym *sym;
7595 struct tocsave_entry ent, *p;
7596 hashval_t hash;
7597 struct tocsave_entry **slot;
7598
7599 r_indx = ELF64_R_SYM (irela->r_info);
7600 if (!get_sym_h (&h, &sym, &ent.sec, NULL, local_syms, r_indx, ibfd))
7601 return NULL;
7602 if (ent.sec == NULL || ent.sec->output_section == NULL)
7603 {
7604 _bfd_error_handler
7605 (_("%B: undefined symbol on R_PPC64_TOCSAVE relocation"));
7606 return NULL;
7607 }
7608
7609 if (h != NULL)
7610 ent.offset = h->root.u.def.value;
7611 else
7612 ent.offset = sym->st_value;
7613 ent.offset += irela->r_addend;
7614
7615 hash = tocsave_htab_hash (&ent);
7616 slot = ((struct tocsave_entry **)
7617 htab_find_slot_with_hash (htab->tocsave_htab, &ent, hash, insert));
7618 if (slot == NULL)
7619 return NULL;
7620
7621 if (*slot == NULL)
7622 {
7623 p = (struct tocsave_entry *) bfd_alloc (ibfd, sizeof (*p));
7624 if (p == NULL)
7625 return NULL;
7626 *p = ent;
7627 *slot = p;
7628 }
7629 return *slot;
7630 }
7631
7632 /* Adjust all global syms defined in opd sections. In gcc generated
7633 code for the old ABI, these will already have been done. */
7634
7635 static bfd_boolean
7636 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
7637 {
7638 struct ppc_link_hash_entry *eh;
7639 asection *sym_sec;
7640 struct _opd_sec_data *opd;
7641
7642 if (h->root.type == bfd_link_hash_indirect)
7643 return TRUE;
7644
7645 if (h->root.type != bfd_link_hash_defined
7646 && h->root.type != bfd_link_hash_defweak)
7647 return TRUE;
7648
7649 eh = (struct ppc_link_hash_entry *) h;
7650 if (eh->adjust_done)
7651 return TRUE;
7652
7653 sym_sec = eh->elf.root.u.def.section;
7654 opd = get_opd_info (sym_sec);
7655 if (opd != NULL && opd->adjust != NULL)
7656 {
7657 long adjust = opd->adjust[OPD_NDX (eh->elf.root.u.def.value)];
7658 if (adjust == -1)
7659 {
7660 /* This entry has been deleted. */
7661 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
7662 if (dsec == NULL)
7663 {
7664 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
7665 if (discarded_section (dsec))
7666 {
7667 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
7668 break;
7669 }
7670 }
7671 eh->elf.root.u.def.value = 0;
7672 eh->elf.root.u.def.section = dsec;
7673 }
7674 else
7675 eh->elf.root.u.def.value += adjust;
7676 eh->adjust_done = 1;
7677 }
7678 return TRUE;
7679 }
7680
7681 /* Handles decrementing dynamic reloc counts for the reloc specified by
7682 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM
7683 have already been determined. */
7684
7685 static bfd_boolean
7686 dec_dynrel_count (bfd_vma r_info,
7687 asection *sec,
7688 struct bfd_link_info *info,
7689 Elf_Internal_Sym **local_syms,
7690 struct elf_link_hash_entry *h,
7691 Elf_Internal_Sym *sym)
7692 {
7693 enum elf_ppc64_reloc_type r_type;
7694 asection *sym_sec = NULL;
7695
7696 /* Can this reloc be dynamic? This switch, and later tests here
7697 should be kept in sync with the code in check_relocs. */
7698 r_type = ELF64_R_TYPE (r_info);
7699 switch (r_type)
7700 {
7701 default:
7702 return TRUE;
7703
7704 case R_PPC64_TPREL16:
7705 case R_PPC64_TPREL16_LO:
7706 case R_PPC64_TPREL16_HI:
7707 case R_PPC64_TPREL16_HA:
7708 case R_PPC64_TPREL16_DS:
7709 case R_PPC64_TPREL16_LO_DS:
7710 case R_PPC64_TPREL16_HIGH:
7711 case R_PPC64_TPREL16_HIGHA:
7712 case R_PPC64_TPREL16_HIGHER:
7713 case R_PPC64_TPREL16_HIGHERA:
7714 case R_PPC64_TPREL16_HIGHEST:
7715 case R_PPC64_TPREL16_HIGHESTA:
7716 if (!bfd_link_pic (info))
7717 return TRUE;
7718
7719 case R_PPC64_TPREL64:
7720 case R_PPC64_DTPMOD64:
7721 case R_PPC64_DTPREL64:
7722 case R_PPC64_ADDR64:
7723 case R_PPC64_REL30:
7724 case R_PPC64_REL32:
7725 case R_PPC64_REL64:
7726 case R_PPC64_ADDR14:
7727 case R_PPC64_ADDR14_BRNTAKEN:
7728 case R_PPC64_ADDR14_BRTAKEN:
7729 case R_PPC64_ADDR16:
7730 case R_PPC64_ADDR16_DS:
7731 case R_PPC64_ADDR16_HA:
7732 case R_PPC64_ADDR16_HI:
7733 case R_PPC64_ADDR16_HIGH:
7734 case R_PPC64_ADDR16_HIGHA:
7735 case R_PPC64_ADDR16_HIGHER:
7736 case R_PPC64_ADDR16_HIGHERA:
7737 case R_PPC64_ADDR16_HIGHEST:
7738 case R_PPC64_ADDR16_HIGHESTA:
7739 case R_PPC64_ADDR16_LO:
7740 case R_PPC64_ADDR16_LO_DS:
7741 case R_PPC64_ADDR24:
7742 case R_PPC64_ADDR32:
7743 case R_PPC64_UADDR16:
7744 case R_PPC64_UADDR32:
7745 case R_PPC64_UADDR64:
7746 case R_PPC64_TOC:
7747 break;
7748 }
7749
7750 if (local_syms != NULL)
7751 {
7752 unsigned long r_symndx;
7753 bfd *ibfd = sec->owner;
7754
7755 r_symndx = ELF64_R_SYM (r_info);
7756 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
7757 return FALSE;
7758 }
7759
7760 if ((bfd_link_pic (info)
7761 && (must_be_dyn_reloc (info, r_type)
7762 || (h != NULL
7763 && (!SYMBOLIC_BIND (info, h)
7764 || h->root.type == bfd_link_hash_defweak
7765 || !h->def_regular))))
7766 || (ELIMINATE_COPY_RELOCS
7767 && !bfd_link_pic (info)
7768 && h != NULL
7769 && (h->root.type == bfd_link_hash_defweak
7770 || !h->def_regular)))
7771 ;
7772 else
7773 return TRUE;
7774
7775 if (h != NULL)
7776 {
7777 struct elf_dyn_relocs *p;
7778 struct elf_dyn_relocs **pp;
7779 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
7780
7781 /* elf_gc_sweep may have already removed all dyn relocs associated
7782 with local syms for a given section. Also, symbol flags are
7783 changed by elf_gc_sweep_symbol, confusing the test above. Don't
7784 report a dynreloc miscount. */
7785 if (*pp == NULL && info->gc_sections)
7786 return TRUE;
7787
7788 while ((p = *pp) != NULL)
7789 {
7790 if (p->sec == sec)
7791 {
7792 if (!must_be_dyn_reloc (info, r_type))
7793 p->pc_count -= 1;
7794 p->count -= 1;
7795 if (p->count == 0)
7796 *pp = p->next;
7797 return TRUE;
7798 }
7799 pp = &p->next;
7800 }
7801 }
7802 else
7803 {
7804 struct ppc_dyn_relocs *p;
7805 struct ppc_dyn_relocs **pp;
7806 void *vpp;
7807 bfd_boolean is_ifunc;
7808
7809 if (local_syms == NULL)
7810 sym_sec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
7811 if (sym_sec == NULL)
7812 sym_sec = sec;
7813
7814 vpp = &elf_section_data (sym_sec)->local_dynrel;
7815 pp = (struct ppc_dyn_relocs **) vpp;
7816
7817 if (*pp == NULL && info->gc_sections)
7818 return TRUE;
7819
7820 is_ifunc = ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC;
7821 while ((p = *pp) != NULL)
7822 {
7823 if (p->sec == sec && p->ifunc == is_ifunc)
7824 {
7825 p->count -= 1;
7826 if (p->count == 0)
7827 *pp = p->next;
7828 return TRUE;
7829 }
7830 pp = &p->next;
7831 }
7832 }
7833
7834 info->callbacks->einfo (_("%P: dynreloc miscount for %B, section %A\n"),
7835 sec->owner, sec);
7836 bfd_set_error (bfd_error_bad_value);
7837 return FALSE;
7838 }
7839
7840 /* Remove unused Official Procedure Descriptor entries. Currently we
7841 only remove those associated with functions in discarded link-once
7842 sections, or weakly defined functions that have been overridden. It
7843 would be possible to remove many more entries for statically linked
7844 applications. */
7845
7846 bfd_boolean
7847 ppc64_elf_edit_opd (struct bfd_link_info *info)
7848 {
7849 bfd *ibfd;
7850 bfd_boolean some_edited = FALSE;
7851 asection *need_pad = NULL;
7852 struct ppc_link_hash_table *htab;
7853
7854 htab = ppc_hash_table (info);
7855 if (htab == NULL)
7856 return FALSE;
7857
7858 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
7859 {
7860 asection *sec;
7861 Elf_Internal_Rela *relstart, *rel, *relend;
7862 Elf_Internal_Shdr *symtab_hdr;
7863 Elf_Internal_Sym *local_syms;
7864 struct _opd_sec_data *opd;
7865 bfd_boolean need_edit, add_aux_fields, broken;
7866 bfd_size_type cnt_16b = 0;
7867
7868 if (!is_ppc64_elf (ibfd))
7869 continue;
7870
7871 sec = bfd_get_section_by_name (ibfd, ".opd");
7872 if (sec == NULL || sec->size == 0)
7873 continue;
7874
7875 if (sec->sec_info_type == SEC_INFO_TYPE_JUST_SYMS)
7876 continue;
7877
7878 if (sec->output_section == bfd_abs_section_ptr)
7879 continue;
7880
7881 /* Look through the section relocs. */
7882 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
7883 continue;
7884
7885 local_syms = NULL;
7886 symtab_hdr = &elf_symtab_hdr (ibfd);
7887
7888 /* Read the relocations. */
7889 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7890 info->keep_memory);
7891 if (relstart == NULL)
7892 return FALSE;
7893
7894 /* First run through the relocs to check they are sane, and to
7895 determine whether we need to edit this opd section. */
7896 need_edit = FALSE;
7897 broken = FALSE;
7898 need_pad = sec;
7899 relend = relstart + sec->reloc_count;
7900 for (rel = relstart; rel < relend; )
7901 {
7902 enum elf_ppc64_reloc_type r_type;
7903 unsigned long r_symndx;
7904 asection *sym_sec;
7905 struct elf_link_hash_entry *h;
7906 Elf_Internal_Sym *sym;
7907 bfd_vma offset;
7908
7909 /* .opd contains an array of 16 or 24 byte entries. We're
7910 only interested in the reloc pointing to a function entry
7911 point. */
7912 offset = rel->r_offset;
7913 if (rel + 1 == relend
7914 || rel[1].r_offset != offset + 8)
7915 {
7916 /* If someone messes with .opd alignment then after a
7917 "ld -r" we might have padding in the middle of .opd.
7918 Also, there's nothing to prevent someone putting
7919 something silly in .opd with the assembler. No .opd
7920 optimization for them! */
7921 broken_opd:
7922 _bfd_error_handler
7923 (_("%B: .opd is not a regular array of opd entries"), ibfd);
7924 broken = TRUE;
7925 break;
7926 }
7927
7928 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
7929 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
7930 {
7931 _bfd_error_handler
7932 (_("%B: unexpected reloc type %u in .opd section"),
7933 ibfd, r_type);
7934 broken = TRUE;
7935 break;
7936 }
7937
7938 r_symndx = ELF64_R_SYM (rel->r_info);
7939 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7940 r_symndx, ibfd))
7941 goto error_ret;
7942
7943 if (sym_sec == NULL || sym_sec->owner == NULL)
7944 {
7945 const char *sym_name;
7946 if (h != NULL)
7947 sym_name = h->root.root.string;
7948 else
7949 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
7950 sym_sec);
7951
7952 _bfd_error_handler
7953 (_("%B: undefined sym `%s' in .opd section"),
7954 ibfd, sym_name);
7955 broken = TRUE;
7956 break;
7957 }
7958
7959 /* opd entries are always for functions defined in the
7960 current input bfd. If the symbol isn't defined in the
7961 input bfd, then we won't be using the function in this
7962 bfd; It must be defined in a linkonce section in another
7963 bfd, or is weak. It's also possible that we are
7964 discarding the function due to a linker script /DISCARD/,
7965 which we test for via the output_section. */
7966 if (sym_sec->owner != ibfd
7967 || sym_sec->output_section == bfd_abs_section_ptr)
7968 need_edit = TRUE;
7969
7970 rel += 2;
7971 if (rel + 1 == relend
7972 || (rel + 2 < relend
7973 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC))
7974 ++rel;
7975
7976 if (rel == relend)
7977 {
7978 if (sec->size == offset + 24)
7979 {
7980 need_pad = NULL;
7981 break;
7982 }
7983 if (sec->size == offset + 16)
7984 {
7985 cnt_16b++;
7986 break;
7987 }
7988 goto broken_opd;
7989 }
7990 else if (rel + 1 < relend
7991 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
7992 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
7993 {
7994 if (rel[0].r_offset == offset + 16)
7995 cnt_16b++;
7996 else if (rel[0].r_offset != offset + 24)
7997 goto broken_opd;
7998 }
7999 else
8000 goto broken_opd;
8001 }
8002
8003 add_aux_fields = htab->params->non_overlapping_opd && cnt_16b > 0;
8004
8005 if (!broken && (need_edit || add_aux_fields))
8006 {
8007 Elf_Internal_Rela *write_rel;
8008 Elf_Internal_Shdr *rel_hdr;
8009 bfd_byte *rptr, *wptr;
8010 bfd_byte *new_contents;
8011 bfd_size_type amt;
8012
8013 new_contents = NULL;
8014 amt = OPD_NDX (sec->size) * sizeof (long);
8015 opd = &ppc64_elf_section_data (sec)->u.opd;
8016 opd->adjust = bfd_zalloc (sec->owner, amt);
8017 if (opd->adjust == NULL)
8018 return FALSE;
8019 ppc64_elf_section_data (sec)->sec_type = sec_opd;
8020
8021 /* This seems a waste of time as input .opd sections are all
8022 zeros as generated by gcc, but I suppose there's no reason
8023 this will always be so. We might start putting something in
8024 the third word of .opd entries. */
8025 if ((sec->flags & SEC_IN_MEMORY) == 0)
8026 {
8027 bfd_byte *loc;
8028 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
8029 {
8030 if (loc != NULL)
8031 free (loc);
8032 error_ret:
8033 if (local_syms != NULL
8034 && symtab_hdr->contents != (unsigned char *) local_syms)
8035 free (local_syms);
8036 if (elf_section_data (sec)->relocs != relstart)
8037 free (relstart);
8038 return FALSE;
8039 }
8040 sec->contents = loc;
8041 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
8042 }
8043
8044 elf_section_data (sec)->relocs = relstart;
8045
8046 new_contents = sec->contents;
8047 if (add_aux_fields)
8048 {
8049 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
8050 if (new_contents == NULL)
8051 return FALSE;
8052 need_pad = NULL;
8053 }
8054 wptr = new_contents;
8055 rptr = sec->contents;
8056 write_rel = relstart;
8057 for (rel = relstart; rel < relend; )
8058 {
8059 unsigned long r_symndx;
8060 asection *sym_sec;
8061 struct elf_link_hash_entry *h;
8062 struct ppc_link_hash_entry *fdh = NULL;
8063 Elf_Internal_Sym *sym;
8064 long opd_ent_size;
8065 Elf_Internal_Rela *next_rel;
8066 bfd_boolean skip;
8067
8068 r_symndx = ELF64_R_SYM (rel->r_info);
8069 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8070 r_symndx, ibfd))
8071 goto error_ret;
8072
8073 next_rel = rel + 2;
8074 if (next_rel + 1 == relend
8075 || (next_rel + 2 < relend
8076 && ELF64_R_TYPE (next_rel[2].r_info) == R_PPC64_TOC))
8077 ++next_rel;
8078
8079 /* See if the .opd entry is full 24 byte or
8080 16 byte (with fd_aux entry overlapped with next
8081 fd_func). */
8082 opd_ent_size = 24;
8083 if (next_rel == relend)
8084 {
8085 if (sec->size == rel->r_offset + 16)
8086 opd_ent_size = 16;
8087 }
8088 else if (next_rel->r_offset == rel->r_offset + 16)
8089 opd_ent_size = 16;
8090
8091 if (h != NULL
8092 && h->root.root.string[0] == '.')
8093 {
8094 fdh = lookup_fdh ((struct ppc_link_hash_entry *) h, htab);
8095 if (fdh != NULL
8096 && fdh->elf.root.type != bfd_link_hash_defined
8097 && fdh->elf.root.type != bfd_link_hash_defweak)
8098 fdh = NULL;
8099 }
8100
8101 skip = (sym_sec->owner != ibfd
8102 || sym_sec->output_section == bfd_abs_section_ptr);
8103 if (skip)
8104 {
8105 if (fdh != NULL && sym_sec->owner == ibfd)
8106 {
8107 /* Arrange for the function descriptor sym
8108 to be dropped. */
8109 fdh->elf.root.u.def.value = 0;
8110 fdh->elf.root.u.def.section = sym_sec;
8111 }
8112 opd->adjust[OPD_NDX (rel->r_offset)] = -1;
8113
8114 if (NO_OPD_RELOCS || bfd_link_relocatable (info))
8115 rel = next_rel;
8116 else
8117 while (1)
8118 {
8119 if (!dec_dynrel_count (rel->r_info, sec, info,
8120 NULL, h, sym))
8121 goto error_ret;
8122
8123 if (++rel == next_rel)
8124 break;
8125
8126 r_symndx = ELF64_R_SYM (rel->r_info);
8127 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8128 r_symndx, ibfd))
8129 goto error_ret;
8130 }
8131 }
8132 else
8133 {
8134 /* We'll be keeping this opd entry. */
8135 long adjust;
8136
8137 if (fdh != NULL)
8138 {
8139 /* Redefine the function descriptor symbol to
8140 this location in the opd section. It is
8141 necessary to update the value here rather
8142 than using an array of adjustments as we do
8143 for local symbols, because various places
8144 in the generic ELF code use the value
8145 stored in u.def.value. */
8146 fdh->elf.root.u.def.value = wptr - new_contents;
8147 fdh->adjust_done = 1;
8148 }
8149
8150 /* Local syms are a bit tricky. We could
8151 tweak them as they can be cached, but
8152 we'd need to look through the local syms
8153 for the function descriptor sym which we
8154 don't have at the moment. So keep an
8155 array of adjustments. */
8156 adjust = (wptr - new_contents) - (rptr - sec->contents);
8157 opd->adjust[OPD_NDX (rel->r_offset)] = adjust;
8158
8159 if (wptr != rptr)
8160 memcpy (wptr, rptr, opd_ent_size);
8161 wptr += opd_ent_size;
8162 if (add_aux_fields && opd_ent_size == 16)
8163 {
8164 memset (wptr, '\0', 8);
8165 wptr += 8;
8166 }
8167
8168 /* We need to adjust any reloc offsets to point to the
8169 new opd entries. */
8170 for ( ; rel != next_rel; ++rel)
8171 {
8172 rel->r_offset += adjust;
8173 if (write_rel != rel)
8174 memcpy (write_rel, rel, sizeof (*rel));
8175 ++write_rel;
8176 }
8177 }
8178
8179 rptr += opd_ent_size;
8180 }
8181
8182 sec->size = wptr - new_contents;
8183 sec->reloc_count = write_rel - relstart;
8184 if (add_aux_fields)
8185 {
8186 free (sec->contents);
8187 sec->contents = new_contents;
8188 }
8189
8190 /* Fudge the header size too, as this is used later in
8191 elf_bfd_final_link if we are emitting relocs. */
8192 rel_hdr = _bfd_elf_single_rel_hdr (sec);
8193 rel_hdr->sh_size = sec->reloc_count * rel_hdr->sh_entsize;
8194 some_edited = TRUE;
8195 }
8196 else if (elf_section_data (sec)->relocs != relstart)
8197 free (relstart);
8198
8199 if (local_syms != NULL
8200 && symtab_hdr->contents != (unsigned char *) local_syms)
8201 {
8202 if (!info->keep_memory)
8203 free (local_syms);
8204 else
8205 symtab_hdr->contents = (unsigned char *) local_syms;
8206 }
8207 }
8208
8209 if (some_edited)
8210 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
8211
8212 /* If we are doing a final link and the last .opd entry is just 16 byte
8213 long, add a 8 byte padding after it. */
8214 if (need_pad != NULL && !bfd_link_relocatable (info))
8215 {
8216 bfd_byte *p;
8217
8218 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
8219 {
8220 BFD_ASSERT (need_pad->size > 0);
8221
8222 p = bfd_malloc (need_pad->size + 8);
8223 if (p == NULL)
8224 return FALSE;
8225
8226 if (! bfd_get_section_contents (need_pad->owner, need_pad,
8227 p, 0, need_pad->size))
8228 return FALSE;
8229
8230 need_pad->contents = p;
8231 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
8232 }
8233 else
8234 {
8235 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
8236 if (p == NULL)
8237 return FALSE;
8238
8239 need_pad->contents = p;
8240 }
8241
8242 memset (need_pad->contents + need_pad->size, 0, 8);
8243 need_pad->size += 8;
8244 }
8245
8246 return TRUE;
8247 }
8248
8249 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
8250
8251 asection *
8252 ppc64_elf_tls_setup (struct bfd_link_info *info)
8253 {
8254 struct ppc_link_hash_table *htab;
8255
8256 htab = ppc_hash_table (info);
8257 if (htab == NULL)
8258 return NULL;
8259
8260 if (abiversion (info->output_bfd) == 1)
8261 htab->opd_abi = 1;
8262
8263 if (htab->params->no_multi_toc)
8264 htab->do_multi_toc = 0;
8265 else if (!htab->do_multi_toc)
8266 htab->params->no_multi_toc = 1;
8267
8268 htab->tls_get_addr = ((struct ppc_link_hash_entry *)
8269 elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
8270 FALSE, FALSE, TRUE));
8271 /* Move dynamic linking info to the function descriptor sym. */
8272 if (htab->tls_get_addr != NULL)
8273 func_desc_adjust (&htab->tls_get_addr->elf, info);
8274 htab->tls_get_addr_fd = ((struct ppc_link_hash_entry *)
8275 elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
8276 FALSE, FALSE, TRUE));
8277 if (htab->params->tls_get_addr_opt)
8278 {
8279 struct elf_link_hash_entry *opt, *opt_fd, *tga, *tga_fd;
8280
8281 opt = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr_opt",
8282 FALSE, FALSE, TRUE);
8283 if (opt != NULL)
8284 func_desc_adjust (opt, info);
8285 opt_fd = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
8286 FALSE, FALSE, TRUE);
8287 if (opt_fd != NULL
8288 && (opt_fd->root.type == bfd_link_hash_defined
8289 || opt_fd->root.type == bfd_link_hash_defweak))
8290 {
8291 /* If glibc supports an optimized __tls_get_addr call stub,
8292 signalled by the presence of __tls_get_addr_opt, and we'll
8293 be calling __tls_get_addr via a plt call stub, then
8294 make __tls_get_addr point to __tls_get_addr_opt. */
8295 tga_fd = &htab->tls_get_addr_fd->elf;
8296 if (htab->elf.dynamic_sections_created
8297 && tga_fd != NULL
8298 && (tga_fd->type == STT_FUNC
8299 || tga_fd->needs_plt)
8300 && !(SYMBOL_CALLS_LOCAL (info, tga_fd)
8301 || (ELF_ST_VISIBILITY (tga_fd->other) != STV_DEFAULT
8302 && tga_fd->root.type == bfd_link_hash_undefweak)))
8303 {
8304 struct plt_entry *ent;
8305
8306 for (ent = tga_fd->plt.plist; ent != NULL; ent = ent->next)
8307 if (ent->plt.refcount > 0)
8308 break;
8309 if (ent != NULL)
8310 {
8311 tga_fd->root.type = bfd_link_hash_indirect;
8312 tga_fd->root.u.i.link = &opt_fd->root;
8313 ppc64_elf_copy_indirect_symbol (info, opt_fd, tga_fd);
8314 opt_fd->forced_local = 0;
8315 if (opt_fd->dynindx != -1)
8316 {
8317 /* Use __tls_get_addr_opt in dynamic relocations. */
8318 opt_fd->dynindx = -1;
8319 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
8320 opt_fd->dynstr_index);
8321 if (!bfd_elf_link_record_dynamic_symbol (info, opt_fd))
8322 return NULL;
8323 }
8324 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) opt_fd;
8325 tga = &htab->tls_get_addr->elf;
8326 if (opt != NULL && tga != NULL)
8327 {
8328 tga->root.type = bfd_link_hash_indirect;
8329 tga->root.u.i.link = &opt->root;
8330 ppc64_elf_copy_indirect_symbol (info, opt, tga);
8331 opt->forced_local = 0;
8332 _bfd_elf_link_hash_hide_symbol (info, opt,
8333 tga->forced_local);
8334 htab->tls_get_addr = (struct ppc_link_hash_entry *) opt;
8335 }
8336 htab->tls_get_addr_fd->oh = htab->tls_get_addr;
8337 htab->tls_get_addr_fd->is_func_descriptor = 1;
8338 if (htab->tls_get_addr != NULL)
8339 {
8340 htab->tls_get_addr->oh = htab->tls_get_addr_fd;
8341 htab->tls_get_addr->is_func = 1;
8342 }
8343 }
8344 }
8345 }
8346 else if (htab->params->tls_get_addr_opt < 0)
8347 htab->params->tls_get_addr_opt = 0;
8348 }
8349 return _bfd_elf_tls_setup (info->output_bfd, info);
8350 }
8351
8352 /* Return TRUE iff REL is a branch reloc with a global symbol matching
8353 HASH1 or HASH2. */
8354
8355 static bfd_boolean
8356 branch_reloc_hash_match (const bfd *ibfd,
8357 const Elf_Internal_Rela *rel,
8358 const struct ppc_link_hash_entry *hash1,
8359 const struct ppc_link_hash_entry *hash2)
8360 {
8361 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
8362 enum elf_ppc64_reloc_type r_type = ELF64_R_TYPE (rel->r_info);
8363 unsigned int r_symndx = ELF64_R_SYM (rel->r_info);
8364
8365 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
8366 {
8367 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
8368 struct elf_link_hash_entry *h;
8369
8370 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
8371 h = elf_follow_link (h);
8372 if (h == &hash1->elf || h == &hash2->elf)
8373 return TRUE;
8374 }
8375 return FALSE;
8376 }
8377
8378 /* Run through all the TLS relocs looking for optimization
8379 opportunities. The linker has been hacked (see ppc64elf.em) to do
8380 a preliminary section layout so that we know the TLS segment
8381 offsets. We can't optimize earlier because some optimizations need
8382 to know the tp offset, and we need to optimize before allocating
8383 dynamic relocations. */
8384
8385 bfd_boolean
8386 ppc64_elf_tls_optimize (struct bfd_link_info *info)
8387 {
8388 bfd *ibfd;
8389 asection *sec;
8390 struct ppc_link_hash_table *htab;
8391 unsigned char *toc_ref;
8392 int pass;
8393
8394 if (!bfd_link_executable (info))
8395 return TRUE;
8396
8397 htab = ppc_hash_table (info);
8398 if (htab == NULL)
8399 return FALSE;
8400
8401 /* Make two passes over the relocs. On the first pass, mark toc
8402 entries involved with tls relocs, and check that tls relocs
8403 involved in setting up a tls_get_addr call are indeed followed by
8404 such a call. If they are not, we can't do any tls optimization.
8405 On the second pass twiddle tls_mask flags to notify
8406 relocate_section that optimization can be done, and adjust got
8407 and plt refcounts. */
8408 toc_ref = NULL;
8409 for (pass = 0; pass < 2; ++pass)
8410 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
8411 {
8412 Elf_Internal_Sym *locsyms = NULL;
8413 asection *toc = bfd_get_section_by_name (ibfd, ".toc");
8414
8415 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8416 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
8417 {
8418 Elf_Internal_Rela *relstart, *rel, *relend;
8419 bfd_boolean found_tls_get_addr_arg = 0;
8420
8421 /* Read the relocations. */
8422 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8423 info->keep_memory);
8424 if (relstart == NULL)
8425 {
8426 free (toc_ref);
8427 return FALSE;
8428 }
8429
8430 relend = relstart + sec->reloc_count;
8431 for (rel = relstart; rel < relend; rel++)
8432 {
8433 enum elf_ppc64_reloc_type r_type;
8434 unsigned long r_symndx;
8435 struct elf_link_hash_entry *h;
8436 Elf_Internal_Sym *sym;
8437 asection *sym_sec;
8438 unsigned char *tls_mask;
8439 unsigned char tls_set, tls_clear, tls_type = 0;
8440 bfd_vma value;
8441 bfd_boolean ok_tprel, is_local;
8442 long toc_ref_index = 0;
8443 int expecting_tls_get_addr = 0;
8444 bfd_boolean ret = FALSE;
8445
8446 r_symndx = ELF64_R_SYM (rel->r_info);
8447 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
8448 r_symndx, ibfd))
8449 {
8450 err_free_rel:
8451 if (elf_section_data (sec)->relocs != relstart)
8452 free (relstart);
8453 if (toc_ref != NULL)
8454 free (toc_ref);
8455 if (locsyms != NULL
8456 && (elf_symtab_hdr (ibfd).contents
8457 != (unsigned char *) locsyms))
8458 free (locsyms);
8459 return ret;
8460 }
8461
8462 if (h != NULL)
8463 {
8464 if (h->root.type == bfd_link_hash_defined
8465 || h->root.type == bfd_link_hash_defweak)
8466 value = h->root.u.def.value;
8467 else if (h->root.type == bfd_link_hash_undefweak)
8468 value = 0;
8469 else
8470 {
8471 found_tls_get_addr_arg = 0;
8472 continue;
8473 }
8474 }
8475 else
8476 /* Symbols referenced by TLS relocs must be of type
8477 STT_TLS. So no need for .opd local sym adjust. */
8478 value = sym->st_value;
8479
8480 ok_tprel = FALSE;
8481 is_local = FALSE;
8482 if (h == NULL
8483 || !h->def_dynamic)
8484 {
8485 is_local = TRUE;
8486 if (h != NULL
8487 && h->root.type == bfd_link_hash_undefweak)
8488 ok_tprel = TRUE;
8489 else if (sym_sec != NULL
8490 && sym_sec->output_section != NULL)
8491 {
8492 value += sym_sec->output_offset;
8493 value += sym_sec->output_section->vma;
8494 value -= htab->elf.tls_sec->vma;
8495 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
8496 < (bfd_vma) 1 << 32);
8497 }
8498 }
8499
8500 r_type = ELF64_R_TYPE (rel->r_info);
8501 /* If this section has old-style __tls_get_addr calls
8502 without marker relocs, then check that each
8503 __tls_get_addr call reloc is preceded by a reloc
8504 that conceivably belongs to the __tls_get_addr arg
8505 setup insn. If we don't find matching arg setup
8506 relocs, don't do any tls optimization. */
8507 if (pass == 0
8508 && sec->has_tls_get_addr_call
8509 && h != NULL
8510 && (h == &htab->tls_get_addr->elf
8511 || h == &htab->tls_get_addr_fd->elf)
8512 && !found_tls_get_addr_arg
8513 && is_branch_reloc (r_type))
8514 {
8515 info->callbacks->minfo (_("%H __tls_get_addr lost arg, "
8516 "TLS optimization disabled\n"),
8517 ibfd, sec, rel->r_offset);
8518 ret = TRUE;
8519 goto err_free_rel;
8520 }
8521
8522 found_tls_get_addr_arg = 0;
8523 switch (r_type)
8524 {
8525 case R_PPC64_GOT_TLSLD16:
8526 case R_PPC64_GOT_TLSLD16_LO:
8527 expecting_tls_get_addr = 1;
8528 found_tls_get_addr_arg = 1;
8529 /* Fall through. */
8530
8531 case R_PPC64_GOT_TLSLD16_HI:
8532 case R_PPC64_GOT_TLSLD16_HA:
8533 /* These relocs should never be against a symbol
8534 defined in a shared lib. Leave them alone if
8535 that turns out to be the case. */
8536 if (!is_local)
8537 continue;
8538
8539 /* LD -> LE */
8540 tls_set = 0;
8541 tls_clear = TLS_LD;
8542 tls_type = TLS_TLS | TLS_LD;
8543 break;
8544
8545 case R_PPC64_GOT_TLSGD16:
8546 case R_PPC64_GOT_TLSGD16_LO:
8547 expecting_tls_get_addr = 1;
8548 found_tls_get_addr_arg = 1;
8549 /* Fall through. */
8550
8551 case R_PPC64_GOT_TLSGD16_HI:
8552 case R_PPC64_GOT_TLSGD16_HA:
8553 if (ok_tprel)
8554 /* GD -> LE */
8555 tls_set = 0;
8556 else
8557 /* GD -> IE */
8558 tls_set = TLS_TLS | TLS_TPRELGD;
8559 tls_clear = TLS_GD;
8560 tls_type = TLS_TLS | TLS_GD;
8561 break;
8562
8563 case R_PPC64_GOT_TPREL16_DS:
8564 case R_PPC64_GOT_TPREL16_LO_DS:
8565 case R_PPC64_GOT_TPREL16_HI:
8566 case R_PPC64_GOT_TPREL16_HA:
8567 if (ok_tprel)
8568 {
8569 /* IE -> LE */
8570 tls_set = 0;
8571 tls_clear = TLS_TPREL;
8572 tls_type = TLS_TLS | TLS_TPREL;
8573 break;
8574 }
8575 continue;
8576
8577 case R_PPC64_TLSGD:
8578 case R_PPC64_TLSLD:
8579 found_tls_get_addr_arg = 1;
8580 /* Fall through. */
8581
8582 case R_PPC64_TLS:
8583 case R_PPC64_TOC16:
8584 case R_PPC64_TOC16_LO:
8585 if (sym_sec == NULL || sym_sec != toc)
8586 continue;
8587
8588 /* Mark this toc entry as referenced by a TLS
8589 code sequence. We can do that now in the
8590 case of R_PPC64_TLS, and after checking for
8591 tls_get_addr for the TOC16 relocs. */
8592 if (toc_ref == NULL)
8593 toc_ref = bfd_zmalloc (toc->output_section->rawsize / 8);
8594 if (toc_ref == NULL)
8595 goto err_free_rel;
8596
8597 if (h != NULL)
8598 value = h->root.u.def.value;
8599 else
8600 value = sym->st_value;
8601 value += rel->r_addend;
8602 if (value % 8 != 0)
8603 continue;
8604 BFD_ASSERT (value < toc->size
8605 && toc->output_offset % 8 == 0);
8606 toc_ref_index = (value + toc->output_offset) / 8;
8607 if (r_type == R_PPC64_TLS
8608 || r_type == R_PPC64_TLSGD
8609 || r_type == R_PPC64_TLSLD)
8610 {
8611 toc_ref[toc_ref_index] = 1;
8612 continue;
8613 }
8614
8615 if (pass != 0 && toc_ref[toc_ref_index] == 0)
8616 continue;
8617
8618 tls_set = 0;
8619 tls_clear = 0;
8620 expecting_tls_get_addr = 2;
8621 break;
8622
8623 case R_PPC64_TPREL64:
8624 if (pass == 0
8625 || sec != toc
8626 || toc_ref == NULL
8627 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
8628 continue;
8629 if (ok_tprel)
8630 {
8631 /* IE -> LE */
8632 tls_set = TLS_EXPLICIT;
8633 tls_clear = TLS_TPREL;
8634 break;
8635 }
8636 continue;
8637
8638 case R_PPC64_DTPMOD64:
8639 if (pass == 0
8640 || sec != toc
8641 || toc_ref == NULL
8642 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
8643 continue;
8644 if (rel + 1 < relend
8645 && (rel[1].r_info
8646 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
8647 && rel[1].r_offset == rel->r_offset + 8)
8648 {
8649 if (ok_tprel)
8650 /* GD -> LE */
8651 tls_set = TLS_EXPLICIT | TLS_GD;
8652 else
8653 /* GD -> IE */
8654 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
8655 tls_clear = TLS_GD;
8656 }
8657 else
8658 {
8659 if (!is_local)
8660 continue;
8661
8662 /* LD -> LE */
8663 tls_set = TLS_EXPLICIT;
8664 tls_clear = TLS_LD;
8665 }
8666 break;
8667
8668 default:
8669 continue;
8670 }
8671
8672 if (pass == 0)
8673 {
8674 if (!expecting_tls_get_addr
8675 || !sec->has_tls_get_addr_call)
8676 continue;
8677
8678 if (rel + 1 < relend
8679 && branch_reloc_hash_match (ibfd, rel + 1,
8680 htab->tls_get_addr,
8681 htab->tls_get_addr_fd))
8682 {
8683 if (expecting_tls_get_addr == 2)
8684 {
8685 /* Check for toc tls entries. */
8686 unsigned char *toc_tls;
8687 int retval;
8688
8689 retval = get_tls_mask (&toc_tls, NULL, NULL,
8690 &locsyms,
8691 rel, ibfd);
8692 if (retval == 0)
8693 goto err_free_rel;
8694 if (toc_tls != NULL)
8695 {
8696 if ((*toc_tls & (TLS_GD | TLS_LD)) != 0)
8697 found_tls_get_addr_arg = 1;
8698 if (retval > 1)
8699 toc_ref[toc_ref_index] = 1;
8700 }
8701 }
8702 continue;
8703 }
8704
8705 if (expecting_tls_get_addr != 1)
8706 continue;
8707
8708 /* Uh oh, we didn't find the expected call. We
8709 could just mark this symbol to exclude it
8710 from tls optimization but it's safer to skip
8711 the entire optimization. */
8712 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
8713 "TLS optimization disabled\n"),
8714 ibfd, sec, rel->r_offset);
8715 ret = TRUE;
8716 goto err_free_rel;
8717 }
8718
8719 if (expecting_tls_get_addr && htab->tls_get_addr != NULL)
8720 {
8721 struct plt_entry *ent;
8722 for (ent = htab->tls_get_addr->elf.plt.plist;
8723 ent != NULL;
8724 ent = ent->next)
8725 if (ent->addend == 0)
8726 {
8727 if (ent->plt.refcount > 0)
8728 {
8729 ent->plt.refcount -= 1;
8730 expecting_tls_get_addr = 0;
8731 }
8732 break;
8733 }
8734 }
8735
8736 if (expecting_tls_get_addr && htab->tls_get_addr_fd != NULL)
8737 {
8738 struct plt_entry *ent;
8739 for (ent = htab->tls_get_addr_fd->elf.plt.plist;
8740 ent != NULL;
8741 ent = ent->next)
8742 if (ent->addend == 0)
8743 {
8744 if (ent->plt.refcount > 0)
8745 ent->plt.refcount -= 1;
8746 break;
8747 }
8748 }
8749
8750 if (tls_clear == 0)
8751 continue;
8752
8753 if ((tls_set & TLS_EXPLICIT) == 0)
8754 {
8755 struct got_entry *ent;
8756
8757 /* Adjust got entry for this reloc. */
8758 if (h != NULL)
8759 ent = h->got.glist;
8760 else
8761 ent = elf_local_got_ents (ibfd)[r_symndx];
8762
8763 for (; ent != NULL; ent = ent->next)
8764 if (ent->addend == rel->r_addend
8765 && ent->owner == ibfd
8766 && ent->tls_type == tls_type)
8767 break;
8768 if (ent == NULL)
8769 abort ();
8770
8771 if (tls_set == 0)
8772 {
8773 /* We managed to get rid of a got entry. */
8774 if (ent->got.refcount > 0)
8775 ent->got.refcount -= 1;
8776 }
8777 }
8778 else
8779 {
8780 /* If we got rid of a DTPMOD/DTPREL reloc pair then
8781 we'll lose one or two dyn relocs. */
8782 if (!dec_dynrel_count (rel->r_info, sec, info,
8783 NULL, h, sym))
8784 return FALSE;
8785
8786 if (tls_set == (TLS_EXPLICIT | TLS_GD))
8787 {
8788 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
8789 NULL, h, sym))
8790 return FALSE;
8791 }
8792 }
8793
8794 *tls_mask |= tls_set;
8795 *tls_mask &= ~tls_clear;
8796 }
8797
8798 if (elf_section_data (sec)->relocs != relstart)
8799 free (relstart);
8800 }
8801
8802 if (locsyms != NULL
8803 && (elf_symtab_hdr (ibfd).contents != (unsigned char *) locsyms))
8804 {
8805 if (!info->keep_memory)
8806 free (locsyms);
8807 else
8808 elf_symtab_hdr (ibfd).contents = (unsigned char *) locsyms;
8809 }
8810 }
8811
8812 if (toc_ref != NULL)
8813 free (toc_ref);
8814 return TRUE;
8815 }
8816
8817 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
8818 the values of any global symbols in a toc section that has been
8819 edited. Globals in toc sections should be a rarity, so this function
8820 sets a flag if any are found in toc sections other than the one just
8821 edited, so that futher hash table traversals can be avoided. */
8822
8823 struct adjust_toc_info
8824 {
8825 asection *toc;
8826 unsigned long *skip;
8827 bfd_boolean global_toc_syms;
8828 };
8829
8830 enum toc_skip_enum { ref_from_discarded = 1, can_optimize = 2 };
8831
8832 static bfd_boolean
8833 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
8834 {
8835 struct ppc_link_hash_entry *eh;
8836 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
8837 unsigned long i;
8838
8839 if (h->root.type != bfd_link_hash_defined
8840 && h->root.type != bfd_link_hash_defweak)
8841 return TRUE;
8842
8843 eh = (struct ppc_link_hash_entry *) h;
8844 if (eh->adjust_done)
8845 return TRUE;
8846
8847 if (eh->elf.root.u.def.section == toc_inf->toc)
8848 {
8849 if (eh->elf.root.u.def.value > toc_inf->toc->rawsize)
8850 i = toc_inf->toc->rawsize >> 3;
8851 else
8852 i = eh->elf.root.u.def.value >> 3;
8853
8854 if ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0)
8855 {
8856 _bfd_error_handler
8857 (_("%s defined on removed toc entry"), eh->elf.root.root.string);
8858 do
8859 ++i;
8860 while ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0);
8861 eh->elf.root.u.def.value = (bfd_vma) i << 3;
8862 }
8863
8864 eh->elf.root.u.def.value -= toc_inf->skip[i];
8865 eh->adjust_done = 1;
8866 }
8867 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
8868 toc_inf->global_toc_syms = TRUE;
8869
8870 return TRUE;
8871 }
8872
8873 /* Return TRUE iff INSN is one we expect on a _LO variety toc/got reloc. */
8874
8875 static bfd_boolean
8876 ok_lo_toc_insn (unsigned int insn)
8877 {
8878 return ((insn & (0x3f << 26)) == 14u << 26 /* addi */
8879 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
8880 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
8881 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
8882 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
8883 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
8884 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
8885 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
8886 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
8887 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
8888 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
8889 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
8890 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
8891 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
8892 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
8893 && (insn & 3) != 1)
8894 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
8895 && ((insn & 3) == 0 || (insn & 3) == 3))
8896 || (insn & (0x3f << 26)) == 12u << 26 /* addic */);
8897 }
8898
8899 /* Examine all relocs referencing .toc sections in order to remove
8900 unused .toc entries. */
8901
8902 bfd_boolean
8903 ppc64_elf_edit_toc (struct bfd_link_info *info)
8904 {
8905 bfd *ibfd;
8906 struct adjust_toc_info toc_inf;
8907 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8908
8909 htab->do_toc_opt = 1;
8910 toc_inf.global_toc_syms = TRUE;
8911 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
8912 {
8913 asection *toc, *sec;
8914 Elf_Internal_Shdr *symtab_hdr;
8915 Elf_Internal_Sym *local_syms;
8916 Elf_Internal_Rela *relstart, *rel, *toc_relocs;
8917 unsigned long *skip, *drop;
8918 unsigned char *used;
8919 unsigned char *keep, last, some_unused;
8920
8921 if (!is_ppc64_elf (ibfd))
8922 continue;
8923
8924 toc = bfd_get_section_by_name (ibfd, ".toc");
8925 if (toc == NULL
8926 || toc->size == 0
8927 || toc->sec_info_type == SEC_INFO_TYPE_JUST_SYMS
8928 || discarded_section (toc))
8929 continue;
8930
8931 toc_relocs = NULL;
8932 local_syms = NULL;
8933 symtab_hdr = &elf_symtab_hdr (ibfd);
8934
8935 /* Look at sections dropped from the final link. */
8936 skip = NULL;
8937 relstart = NULL;
8938 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8939 {
8940 if (sec->reloc_count == 0
8941 || !discarded_section (sec)
8942 || get_opd_info (sec)
8943 || (sec->flags & SEC_ALLOC) == 0
8944 || (sec->flags & SEC_DEBUGGING) != 0)
8945 continue;
8946
8947 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
8948 if (relstart == NULL)
8949 goto error_ret;
8950
8951 /* Run through the relocs to see which toc entries might be
8952 unused. */
8953 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8954 {
8955 enum elf_ppc64_reloc_type r_type;
8956 unsigned long r_symndx;
8957 asection *sym_sec;
8958 struct elf_link_hash_entry *h;
8959 Elf_Internal_Sym *sym;
8960 bfd_vma val;
8961
8962 r_type = ELF64_R_TYPE (rel->r_info);
8963 switch (r_type)
8964 {
8965 default:
8966 continue;
8967
8968 case R_PPC64_TOC16:
8969 case R_PPC64_TOC16_LO:
8970 case R_PPC64_TOC16_HI:
8971 case R_PPC64_TOC16_HA:
8972 case R_PPC64_TOC16_DS:
8973 case R_PPC64_TOC16_LO_DS:
8974 break;
8975 }
8976
8977 r_symndx = ELF64_R_SYM (rel->r_info);
8978 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8979 r_symndx, ibfd))
8980 goto error_ret;
8981
8982 if (sym_sec != toc)
8983 continue;
8984
8985 if (h != NULL)
8986 val = h->root.u.def.value;
8987 else
8988 val = sym->st_value;
8989 val += rel->r_addend;
8990
8991 if (val >= toc->size)
8992 continue;
8993
8994 /* Anything in the toc ought to be aligned to 8 bytes.
8995 If not, don't mark as unused. */
8996 if (val & 7)
8997 continue;
8998
8999 if (skip == NULL)
9000 {
9001 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
9002 if (skip == NULL)
9003 goto error_ret;
9004 }
9005
9006 skip[val >> 3] = ref_from_discarded;
9007 }
9008
9009 if (elf_section_data (sec)->relocs != relstart)
9010 free (relstart);
9011 }
9012
9013 /* For largetoc loads of address constants, we can convert
9014 . addis rx,2,addr@got@ha
9015 . ld ry,addr@got@l(rx)
9016 to
9017 . addis rx,2,addr@toc@ha
9018 . addi ry,rx,addr@toc@l
9019 when addr is within 2G of the toc pointer. This then means
9020 that the word storing "addr" in the toc is no longer needed. */
9021
9022 if (!ppc64_elf_tdata (ibfd)->has_small_toc_reloc
9023 && toc->output_section->rawsize < (bfd_vma) 1 << 31
9024 && toc->reloc_count != 0)
9025 {
9026 /* Read toc relocs. */
9027 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
9028 info->keep_memory);
9029 if (toc_relocs == NULL)
9030 goto error_ret;
9031
9032 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
9033 {
9034 enum elf_ppc64_reloc_type r_type;
9035 unsigned long r_symndx;
9036 asection *sym_sec;
9037 struct elf_link_hash_entry *h;
9038 Elf_Internal_Sym *sym;
9039 bfd_vma val, addr;
9040
9041 r_type = ELF64_R_TYPE (rel->r_info);
9042 if (r_type != R_PPC64_ADDR64)
9043 continue;
9044
9045 r_symndx = ELF64_R_SYM (rel->r_info);
9046 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9047 r_symndx, ibfd))
9048 goto error_ret;
9049
9050 if (sym_sec == NULL
9051 || sym_sec->output_section == NULL
9052 || discarded_section (sym_sec))
9053 continue;
9054
9055 if (!SYMBOL_REFERENCES_LOCAL (info, h))
9056 continue;
9057
9058 if (h != NULL)
9059 {
9060 if (h->type == STT_GNU_IFUNC)
9061 continue;
9062 val = h->root.u.def.value;
9063 }
9064 else
9065 {
9066 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
9067 continue;
9068 val = sym->st_value;
9069 }
9070 val += rel->r_addend;
9071 val += sym_sec->output_section->vma + sym_sec->output_offset;
9072
9073 /* We don't yet know the exact toc pointer value, but we
9074 know it will be somewhere in the toc section. Don't
9075 optimize if the difference from any possible toc
9076 pointer is outside [ff..f80008000, 7fff7fff]. */
9077 addr = toc->output_section->vma + TOC_BASE_OFF;
9078 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
9079 continue;
9080
9081 addr = toc->output_section->vma + toc->output_section->rawsize;
9082 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
9083 continue;
9084
9085 if (skip == NULL)
9086 {
9087 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
9088 if (skip == NULL)
9089 goto error_ret;
9090 }
9091
9092 skip[rel->r_offset >> 3]
9093 |= can_optimize | ((rel - toc_relocs) << 2);
9094 }
9095 }
9096
9097 if (skip == NULL)
9098 continue;
9099
9100 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
9101 if (used == NULL)
9102 {
9103 error_ret:
9104 if (local_syms != NULL
9105 && symtab_hdr->contents != (unsigned char *) local_syms)
9106 free (local_syms);
9107 if (sec != NULL
9108 && relstart != NULL
9109 && elf_section_data (sec)->relocs != relstart)
9110 free (relstart);
9111 if (toc_relocs != NULL
9112 && elf_section_data (toc)->relocs != toc_relocs)
9113 free (toc_relocs);
9114 if (skip != NULL)
9115 free (skip);
9116 return FALSE;
9117 }
9118
9119 /* Now check all kept sections that might reference the toc.
9120 Check the toc itself last. */
9121 for (sec = (ibfd->sections == toc && toc->next ? toc->next
9122 : ibfd->sections);
9123 sec != NULL;
9124 sec = (sec == toc ? NULL
9125 : sec->next == NULL ? toc
9126 : sec->next == toc && toc->next ? toc->next
9127 : sec->next))
9128 {
9129 int repeat;
9130
9131 if (sec->reloc_count == 0
9132 || discarded_section (sec)
9133 || get_opd_info (sec)
9134 || (sec->flags & SEC_ALLOC) == 0
9135 || (sec->flags & SEC_DEBUGGING) != 0)
9136 continue;
9137
9138 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
9139 info->keep_memory);
9140 if (relstart == NULL)
9141 {
9142 free (used);
9143 goto error_ret;
9144 }
9145
9146 /* Mark toc entries referenced as used. */
9147 do
9148 {
9149 repeat = 0;
9150 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
9151 {
9152 enum elf_ppc64_reloc_type r_type;
9153 unsigned long r_symndx;
9154 asection *sym_sec;
9155 struct elf_link_hash_entry *h;
9156 Elf_Internal_Sym *sym;
9157 bfd_vma val;
9158 enum {no_check, check_lo, check_ha} insn_check;
9159
9160 r_type = ELF64_R_TYPE (rel->r_info);
9161 switch (r_type)
9162 {
9163 default:
9164 insn_check = no_check;
9165 break;
9166
9167 case R_PPC64_GOT_TLSLD16_HA:
9168 case R_PPC64_GOT_TLSGD16_HA:
9169 case R_PPC64_GOT_TPREL16_HA:
9170 case R_PPC64_GOT_DTPREL16_HA:
9171 case R_PPC64_GOT16_HA:
9172 case R_PPC64_TOC16_HA:
9173 insn_check = check_ha;
9174 break;
9175
9176 case R_PPC64_GOT_TLSLD16_LO:
9177 case R_PPC64_GOT_TLSGD16_LO:
9178 case R_PPC64_GOT_TPREL16_LO_DS:
9179 case R_PPC64_GOT_DTPREL16_LO_DS:
9180 case R_PPC64_GOT16_LO:
9181 case R_PPC64_GOT16_LO_DS:
9182 case R_PPC64_TOC16_LO:
9183 case R_PPC64_TOC16_LO_DS:
9184 insn_check = check_lo;
9185 break;
9186 }
9187
9188 if (insn_check != no_check)
9189 {
9190 bfd_vma off = rel->r_offset & ~3;
9191 unsigned char buf[4];
9192 unsigned int insn;
9193
9194 if (!bfd_get_section_contents (ibfd, sec, buf, off, 4))
9195 {
9196 free (used);
9197 goto error_ret;
9198 }
9199 insn = bfd_get_32 (ibfd, buf);
9200 if (insn_check == check_lo
9201 ? !ok_lo_toc_insn (insn)
9202 : ((insn & ((0x3f << 26) | 0x1f << 16))
9203 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */))
9204 {
9205 char str[12];
9206
9207 ppc64_elf_tdata (ibfd)->unexpected_toc_insn = 1;
9208 sprintf (str, "%#08x", insn);
9209 info->callbacks->einfo
9210 (_("%P: %H: toc optimization is not supported for"
9211 " %s instruction.\n"),
9212 ibfd, sec, rel->r_offset & ~3, str);
9213 }
9214 }
9215
9216 switch (r_type)
9217 {
9218 case R_PPC64_TOC16:
9219 case R_PPC64_TOC16_LO:
9220 case R_PPC64_TOC16_HI:
9221 case R_PPC64_TOC16_HA:
9222 case R_PPC64_TOC16_DS:
9223 case R_PPC64_TOC16_LO_DS:
9224 /* In case we're taking addresses of toc entries. */
9225 case R_PPC64_ADDR64:
9226 break;
9227
9228 default:
9229 continue;
9230 }
9231
9232 r_symndx = ELF64_R_SYM (rel->r_info);
9233 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9234 r_symndx, ibfd))
9235 {
9236 free (used);
9237 goto error_ret;
9238 }
9239
9240 if (sym_sec != toc)
9241 continue;
9242
9243 if (h != NULL)
9244 val = h->root.u.def.value;
9245 else
9246 val = sym->st_value;
9247 val += rel->r_addend;
9248
9249 if (val >= toc->size)
9250 continue;
9251
9252 if ((skip[val >> 3] & can_optimize) != 0)
9253 {
9254 bfd_vma off;
9255 unsigned char opc;
9256
9257 switch (r_type)
9258 {
9259 case R_PPC64_TOC16_HA:
9260 break;
9261
9262 case R_PPC64_TOC16_LO_DS:
9263 off = rel->r_offset;
9264 off += (bfd_big_endian (ibfd) ? -2 : 3);
9265 if (!bfd_get_section_contents (ibfd, sec, &opc,
9266 off, 1))
9267 {
9268 free (used);
9269 goto error_ret;
9270 }
9271 if ((opc & (0x3f << 2)) == (58u << 2))
9272 break;
9273 /* Fall through. */
9274
9275 default:
9276 /* Wrong sort of reloc, or not a ld. We may
9277 as well clear ref_from_discarded too. */
9278 skip[val >> 3] = 0;
9279 }
9280 }
9281
9282 if (sec != toc)
9283 used[val >> 3] = 1;
9284 /* For the toc section, we only mark as used if this
9285 entry itself isn't unused. */
9286 else if ((used[rel->r_offset >> 3]
9287 || !(skip[rel->r_offset >> 3] & ref_from_discarded))
9288 && !used[val >> 3])
9289 {
9290 /* Do all the relocs again, to catch reference
9291 chains. */
9292 repeat = 1;
9293 used[val >> 3] = 1;
9294 }
9295 }
9296 }
9297 while (repeat);
9298
9299 if (elf_section_data (sec)->relocs != relstart)
9300 free (relstart);
9301 }
9302
9303 /* Merge the used and skip arrays. Assume that TOC
9304 doublewords not appearing as either used or unused belong
9305 to to an entry more than one doubleword in size. */
9306 for (drop = skip, keep = used, last = 0, some_unused = 0;
9307 drop < skip + (toc->size + 7) / 8;
9308 ++drop, ++keep)
9309 {
9310 if (*keep)
9311 {
9312 *drop &= ~ref_from_discarded;
9313 if ((*drop & can_optimize) != 0)
9314 some_unused = 1;
9315 last = 0;
9316 }
9317 else if ((*drop & ref_from_discarded) != 0)
9318 {
9319 some_unused = 1;
9320 last = ref_from_discarded;
9321 }
9322 else
9323 *drop = last;
9324 }
9325
9326 free (used);
9327
9328 if (some_unused)
9329 {
9330 bfd_byte *contents, *src;
9331 unsigned long off;
9332 Elf_Internal_Sym *sym;
9333 bfd_boolean local_toc_syms = FALSE;
9334
9335 /* Shuffle the toc contents, and at the same time convert the
9336 skip array from booleans into offsets. */
9337 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
9338 goto error_ret;
9339
9340 elf_section_data (toc)->this_hdr.contents = contents;
9341
9342 for (src = contents, off = 0, drop = skip;
9343 src < contents + toc->size;
9344 src += 8, ++drop)
9345 {
9346 if ((*drop & (can_optimize | ref_from_discarded)) != 0)
9347 off += 8;
9348 else if (off != 0)
9349 {
9350 *drop = off;
9351 memcpy (src - off, src, 8);
9352 }
9353 }
9354 *drop = off;
9355 toc->rawsize = toc->size;
9356 toc->size = src - contents - off;
9357
9358 /* Adjust addends for relocs against the toc section sym,
9359 and optimize any accesses we can. */
9360 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
9361 {
9362 if (sec->reloc_count == 0
9363 || discarded_section (sec))
9364 continue;
9365
9366 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
9367 info->keep_memory);
9368 if (relstart == NULL)
9369 goto error_ret;
9370
9371 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
9372 {
9373 enum elf_ppc64_reloc_type r_type;
9374 unsigned long r_symndx;
9375 asection *sym_sec;
9376 struct elf_link_hash_entry *h;
9377 bfd_vma val;
9378
9379 r_type = ELF64_R_TYPE (rel->r_info);
9380 switch (r_type)
9381 {
9382 default:
9383 continue;
9384
9385 case R_PPC64_TOC16:
9386 case R_PPC64_TOC16_LO:
9387 case R_PPC64_TOC16_HI:
9388 case R_PPC64_TOC16_HA:
9389 case R_PPC64_TOC16_DS:
9390 case R_PPC64_TOC16_LO_DS:
9391 case R_PPC64_ADDR64:
9392 break;
9393 }
9394
9395 r_symndx = ELF64_R_SYM (rel->r_info);
9396 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9397 r_symndx, ibfd))
9398 goto error_ret;
9399
9400 if (sym_sec != toc)
9401 continue;
9402
9403 if (h != NULL)
9404 val = h->root.u.def.value;
9405 else
9406 {
9407 val = sym->st_value;
9408 if (val != 0)
9409 local_toc_syms = TRUE;
9410 }
9411
9412 val += rel->r_addend;
9413
9414 if (val > toc->rawsize)
9415 val = toc->rawsize;
9416 else if ((skip[val >> 3] & ref_from_discarded) != 0)
9417 continue;
9418 else if ((skip[val >> 3] & can_optimize) != 0)
9419 {
9420 Elf_Internal_Rela *tocrel
9421 = toc_relocs + (skip[val >> 3] >> 2);
9422 unsigned long tsym = ELF64_R_SYM (tocrel->r_info);
9423
9424 switch (r_type)
9425 {
9426 case R_PPC64_TOC16_HA:
9427 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_TOC16_HA);
9428 break;
9429
9430 case R_PPC64_TOC16_LO_DS:
9431 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_LO_DS_OPT);
9432 break;
9433
9434 default:
9435 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
9436 ppc_howto_init ();
9437 info->callbacks->einfo
9438 (_("%P: %H: %s references "
9439 "optimized away TOC entry\n"),
9440 ibfd, sec, rel->r_offset,
9441 ppc64_elf_howto_table[r_type]->name);
9442 bfd_set_error (bfd_error_bad_value);
9443 goto error_ret;
9444 }
9445 rel->r_addend = tocrel->r_addend;
9446 elf_section_data (sec)->relocs = relstart;
9447 continue;
9448 }
9449
9450 if (h != NULL || sym->st_value != 0)
9451 continue;
9452
9453 rel->r_addend -= skip[val >> 3];
9454 elf_section_data (sec)->relocs = relstart;
9455 }
9456
9457 if (elf_section_data (sec)->relocs != relstart)
9458 free (relstart);
9459 }
9460
9461 /* We shouldn't have local or global symbols defined in the TOC,
9462 but handle them anyway. */
9463 if (local_syms != NULL)
9464 for (sym = local_syms;
9465 sym < local_syms + symtab_hdr->sh_info;
9466 ++sym)
9467 if (sym->st_value != 0
9468 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
9469 {
9470 unsigned long i;
9471
9472 if (sym->st_value > toc->rawsize)
9473 i = toc->rawsize >> 3;
9474 else
9475 i = sym->st_value >> 3;
9476
9477 if ((skip[i] & (ref_from_discarded | can_optimize)) != 0)
9478 {
9479 if (local_toc_syms)
9480 _bfd_error_handler
9481 (_("%s defined on removed toc entry"),
9482 bfd_elf_sym_name (ibfd, symtab_hdr, sym, NULL));
9483 do
9484 ++i;
9485 while ((skip[i] & (ref_from_discarded | can_optimize)));
9486 sym->st_value = (bfd_vma) i << 3;
9487 }
9488
9489 sym->st_value -= skip[i];
9490 symtab_hdr->contents = (unsigned char *) local_syms;
9491 }
9492
9493 /* Adjust any global syms defined in this toc input section. */
9494 if (toc_inf.global_toc_syms)
9495 {
9496 toc_inf.toc = toc;
9497 toc_inf.skip = skip;
9498 toc_inf.global_toc_syms = FALSE;
9499 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
9500 &toc_inf);
9501 }
9502
9503 if (toc->reloc_count != 0)
9504 {
9505 Elf_Internal_Shdr *rel_hdr;
9506 Elf_Internal_Rela *wrel;
9507 bfd_size_type sz;
9508
9509 /* Remove unused toc relocs, and adjust those we keep. */
9510 if (toc_relocs == NULL)
9511 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
9512 info->keep_memory);
9513 if (toc_relocs == NULL)
9514 goto error_ret;
9515
9516 wrel = toc_relocs;
9517 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
9518 if ((skip[rel->r_offset >> 3]
9519 & (ref_from_discarded | can_optimize)) == 0)
9520 {
9521 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
9522 wrel->r_info = rel->r_info;
9523 wrel->r_addend = rel->r_addend;
9524 ++wrel;
9525 }
9526 else if (!dec_dynrel_count (rel->r_info, toc, info,
9527 &local_syms, NULL, NULL))
9528 goto error_ret;
9529
9530 elf_section_data (toc)->relocs = toc_relocs;
9531 toc->reloc_count = wrel - toc_relocs;
9532 rel_hdr = _bfd_elf_single_rel_hdr (toc);
9533 sz = rel_hdr->sh_entsize;
9534 rel_hdr->sh_size = toc->reloc_count * sz;
9535 }
9536 }
9537 else if (toc_relocs != NULL
9538 && elf_section_data (toc)->relocs != toc_relocs)
9539 free (toc_relocs);
9540
9541 if (local_syms != NULL
9542 && symtab_hdr->contents != (unsigned char *) local_syms)
9543 {
9544 if (!info->keep_memory)
9545 free (local_syms);
9546 else
9547 symtab_hdr->contents = (unsigned char *) local_syms;
9548 }
9549 free (skip);
9550 }
9551
9552 return TRUE;
9553 }
9554
9555 /* Return true iff input section I references the TOC using
9556 instructions limited to +/-32k offsets. */
9557
9558 bfd_boolean
9559 ppc64_elf_has_small_toc_reloc (asection *i)
9560 {
9561 return (is_ppc64_elf (i->owner)
9562 && ppc64_elf_tdata (i->owner)->has_small_toc_reloc);
9563 }
9564
9565 /* Allocate space for one GOT entry. */
9566
9567 static void
9568 allocate_got (struct elf_link_hash_entry *h,
9569 struct bfd_link_info *info,
9570 struct got_entry *gent)
9571 {
9572 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9573 bfd_boolean dyn;
9574 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
9575 int entsize = (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)
9576 ? 16 : 8);
9577 int rentsize = (gent->tls_type & eh->tls_mask & TLS_GD
9578 ? 2 : 1) * sizeof (Elf64_External_Rela);
9579 asection *got = ppc64_elf_tdata (gent->owner)->got;
9580
9581 gent->got.offset = got->size;
9582 got->size += entsize;
9583
9584 dyn = htab->elf.dynamic_sections_created;
9585 if (h->type == STT_GNU_IFUNC)
9586 {
9587 htab->elf.irelplt->size += rentsize;
9588 htab->got_reli_size += rentsize;
9589 }
9590 else if ((bfd_link_pic (info)
9591 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
9592 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
9593 || h->root.type != bfd_link_hash_undefweak))
9594 {
9595 asection *relgot = ppc64_elf_tdata (gent->owner)->relgot;
9596 relgot->size += rentsize;
9597 }
9598 }
9599
9600 /* This function merges got entries in the same toc group. */
9601
9602 static void
9603 merge_got_entries (struct got_entry **pent)
9604 {
9605 struct got_entry *ent, *ent2;
9606
9607 for (ent = *pent; ent != NULL; ent = ent->next)
9608 if (!ent->is_indirect)
9609 for (ent2 = ent->next; ent2 != NULL; ent2 = ent2->next)
9610 if (!ent2->is_indirect
9611 && ent2->addend == ent->addend
9612 && ent2->tls_type == ent->tls_type
9613 && elf_gp (ent2->owner) == elf_gp (ent->owner))
9614 {
9615 ent2->is_indirect = TRUE;
9616 ent2->got.ent = ent;
9617 }
9618 }
9619
9620 /* Allocate space in .plt, .got and associated reloc sections for
9621 dynamic relocs. */
9622
9623 static bfd_boolean
9624 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
9625 {
9626 struct bfd_link_info *info;
9627 struct ppc_link_hash_table *htab;
9628 asection *s;
9629 struct ppc_link_hash_entry *eh;
9630 struct got_entry **pgent, *gent;
9631
9632 if (h->root.type == bfd_link_hash_indirect)
9633 return TRUE;
9634
9635 info = (struct bfd_link_info *) inf;
9636 htab = ppc_hash_table (info);
9637 if (htab == NULL)
9638 return FALSE;
9639
9640 eh = (struct ppc_link_hash_entry *) h;
9641 /* Run through the TLS GD got entries first if we're changing them
9642 to TPREL. */
9643 if ((eh->tls_mask & TLS_TPRELGD) != 0)
9644 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9645 if (gent->got.refcount > 0
9646 && (gent->tls_type & TLS_GD) != 0)
9647 {
9648 /* This was a GD entry that has been converted to TPREL. If
9649 there happens to be a TPREL entry we can use that one. */
9650 struct got_entry *ent;
9651 for (ent = h->got.glist; ent != NULL; ent = ent->next)
9652 if (ent->got.refcount > 0
9653 && (ent->tls_type & TLS_TPREL) != 0
9654 && ent->addend == gent->addend
9655 && ent->owner == gent->owner)
9656 {
9657 gent->got.refcount = 0;
9658 break;
9659 }
9660
9661 /* If not, then we'll be using our own TPREL entry. */
9662 if (gent->got.refcount != 0)
9663 gent->tls_type = TLS_TLS | TLS_TPREL;
9664 }
9665
9666 /* Remove any list entry that won't generate a word in the GOT before
9667 we call merge_got_entries. Otherwise we risk merging to empty
9668 entries. */
9669 pgent = &h->got.glist;
9670 while ((gent = *pgent) != NULL)
9671 if (gent->got.refcount > 0)
9672 {
9673 if ((gent->tls_type & TLS_LD) != 0
9674 && !h->def_dynamic)
9675 {
9676 ppc64_tlsld_got (gent->owner)->got.refcount += 1;
9677 *pgent = gent->next;
9678 }
9679 else
9680 pgent = &gent->next;
9681 }
9682 else
9683 *pgent = gent->next;
9684
9685 if (!htab->do_multi_toc)
9686 merge_got_entries (&h->got.glist);
9687
9688 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9689 if (!gent->is_indirect)
9690 {
9691 /* Make sure this symbol is output as a dynamic symbol.
9692 Undefined weak syms won't yet be marked as dynamic,
9693 nor will all TLS symbols. */
9694 if (h->dynindx == -1
9695 && !h->forced_local
9696 && h->type != STT_GNU_IFUNC
9697 && htab->elf.dynamic_sections_created)
9698 {
9699 if (! bfd_elf_link_record_dynamic_symbol (info, h))
9700 return FALSE;
9701 }
9702
9703 if (!is_ppc64_elf (gent->owner))
9704 abort ();
9705
9706 allocate_got (h, info, gent);
9707 }
9708
9709 if (!htab->elf.dynamic_sections_created
9710 && h->type != STT_GNU_IFUNC)
9711 eh->dyn_relocs = NULL;
9712
9713 if (eh->dyn_relocs != NULL)
9714 {
9715 struct elf_dyn_relocs *p, **pp;
9716
9717 /* In the shared -Bsymbolic case, discard space allocated for
9718 dynamic pc-relative relocs against symbols which turn out to
9719 be defined in regular objects. For the normal shared case,
9720 discard space for relocs that have become local due to symbol
9721 visibility changes. */
9722
9723 if (bfd_link_pic (info))
9724 {
9725 /* Relocs that use pc_count are those that appear on a call
9726 insn, or certain REL relocs (see must_be_dyn_reloc) that
9727 can be generated via assembly. We want calls to
9728 protected symbols to resolve directly to the function
9729 rather than going via the plt. If people want function
9730 pointer comparisons to work as expected then they should
9731 avoid writing weird assembly. */
9732 if (SYMBOL_CALLS_LOCAL (info, h))
9733 {
9734 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
9735 {
9736 p->count -= p->pc_count;
9737 p->pc_count = 0;
9738 if (p->count == 0)
9739 *pp = p->next;
9740 else
9741 pp = &p->next;
9742 }
9743 }
9744
9745 /* Also discard relocs on undefined weak syms with
9746 non-default visibility. */
9747 if (eh->dyn_relocs != NULL
9748 && h->root.type == bfd_link_hash_undefweak)
9749 {
9750 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
9751 eh->dyn_relocs = NULL;
9752
9753 /* Make sure this symbol is output as a dynamic symbol.
9754 Undefined weak syms won't yet be marked as dynamic. */
9755 else if (h->dynindx == -1
9756 && !h->forced_local)
9757 {
9758 if (! bfd_elf_link_record_dynamic_symbol (info, h))
9759 return FALSE;
9760 }
9761 }
9762 }
9763 else if (h->type == STT_GNU_IFUNC)
9764 {
9765 /* A plt entry is always created when making direct calls to
9766 an ifunc, even when building a static executable, but
9767 that doesn't cover all cases. We may have only an ifunc
9768 initialised function pointer for a given ifunc symbol.
9769
9770 For ELFv2, dynamic relocations are not required when
9771 generating a global entry PLT stub. */
9772 if (abiversion (info->output_bfd) >= 2)
9773 {
9774 if (global_entry_stub (h))
9775 eh->dyn_relocs = NULL;
9776 }
9777
9778 /* For ELFv1 we have function descriptors. Descriptors need
9779 to be treated like PLT entries and thus have dynamic
9780 relocations. One exception is when the function
9781 descriptor is copied into .dynbss (which should only
9782 happen with ancient versions of gcc). */
9783 else if (h->needs_copy)
9784 eh->dyn_relocs = NULL;
9785 }
9786 else if (ELIMINATE_COPY_RELOCS)
9787 {
9788 /* For the non-pic case, discard space for relocs against
9789 symbols which turn out to need copy relocs or are not
9790 dynamic. */
9791
9792 /* First make sure this symbol is output as a dynamic symbol.
9793 Undefined weak syms won't yet be marked as dynamic. */
9794 if (h->root.type == bfd_link_hash_undefweak
9795 && !h->non_got_ref
9796 && !h->def_regular
9797 && h->dynindx == -1
9798 && !h->forced_local
9799 && !bfd_elf_link_record_dynamic_symbol (info, h))
9800 return FALSE;
9801
9802 if (h->non_got_ref
9803 || h->def_regular
9804 || h->dynindx == -1)
9805 eh->dyn_relocs = NULL;
9806 }
9807
9808 /* Finally, allocate space. */
9809 for (p = eh->dyn_relocs; p != NULL; p = p->next)
9810 {
9811 asection *sreloc = elf_section_data (p->sec)->sreloc;
9812 if (eh->elf.type == STT_GNU_IFUNC)
9813 sreloc = htab->elf.irelplt;
9814 sreloc->size += p->count * sizeof (Elf64_External_Rela);
9815 }
9816 }
9817
9818 if ((htab->elf.dynamic_sections_created
9819 && h->dynindx != -1
9820 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, bfd_link_pic (info), h))
9821 || h->type == STT_GNU_IFUNC)
9822 {
9823 struct plt_entry *pent;
9824 bfd_boolean doneone = FALSE;
9825 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
9826 if (pent->plt.refcount > 0)
9827 {
9828 if (!htab->elf.dynamic_sections_created
9829 || h->dynindx == -1)
9830 {
9831 s = htab->elf.iplt;
9832 pent->plt.offset = s->size;
9833 s->size += PLT_ENTRY_SIZE (htab);
9834 s = htab->elf.irelplt;
9835 }
9836 else
9837 {
9838 /* If this is the first .plt entry, make room for the special
9839 first entry. */
9840 s = htab->elf.splt;
9841 if (s->size == 0)
9842 s->size += PLT_INITIAL_ENTRY_SIZE (htab);
9843
9844 pent->plt.offset = s->size;
9845
9846 /* Make room for this entry. */
9847 s->size += PLT_ENTRY_SIZE (htab);
9848
9849 /* Make room for the .glink code. */
9850 s = htab->glink;
9851 if (s->size == 0)
9852 s->size += GLINK_CALL_STUB_SIZE;
9853 if (htab->opd_abi)
9854 {
9855 /* We need bigger stubs past index 32767. */
9856 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
9857 s->size += 4;
9858 s->size += 2*4;
9859 }
9860 else
9861 s->size += 4;
9862
9863 /* We also need to make an entry in the .rela.plt section. */
9864 s = htab->elf.srelplt;
9865 }
9866 s->size += sizeof (Elf64_External_Rela);
9867 doneone = TRUE;
9868 }
9869 else
9870 pent->plt.offset = (bfd_vma) -1;
9871 if (!doneone)
9872 {
9873 h->plt.plist = NULL;
9874 h->needs_plt = 0;
9875 }
9876 }
9877 else
9878 {
9879 h->plt.plist = NULL;
9880 h->needs_plt = 0;
9881 }
9882
9883 return TRUE;
9884 }
9885
9886 /* Called via elf_link_hash_traverse from ppc64_elf_size_dynamic_sections
9887 to set up space for global entry stubs. These are put in glink,
9888 after the branch table. */
9889
9890 static bfd_boolean
9891 size_global_entry_stubs (struct elf_link_hash_entry *h, void *inf)
9892 {
9893 struct bfd_link_info *info;
9894 struct ppc_link_hash_table *htab;
9895 struct plt_entry *pent;
9896 asection *s;
9897
9898 if (h->root.type == bfd_link_hash_indirect)
9899 return TRUE;
9900
9901 if (!h->pointer_equality_needed)
9902 return TRUE;
9903
9904 if (h->def_regular)
9905 return TRUE;
9906
9907 info = inf;
9908 htab = ppc_hash_table (info);
9909 if (htab == NULL)
9910 return FALSE;
9911
9912 s = htab->glink;
9913 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
9914 if (pent->plt.offset != (bfd_vma) -1
9915 && pent->addend == 0)
9916 {
9917 /* For ELFv2, if this symbol is not defined in a regular file
9918 and we are not generating a shared library or pie, then we
9919 need to define the symbol in the executable on a call stub.
9920 This is to avoid text relocations. */
9921 s->size = (s->size + 15) & -16;
9922 h->root.type = bfd_link_hash_defined;
9923 h->root.u.def.section = s;
9924 h->root.u.def.value = s->size;
9925 s->size += 16;
9926 break;
9927 }
9928 return TRUE;
9929 }
9930
9931 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
9932 read-only sections. */
9933
9934 static bfd_boolean
9935 maybe_set_textrel (struct elf_link_hash_entry *h, void *info)
9936 {
9937 if (h->root.type == bfd_link_hash_indirect)
9938 return TRUE;
9939
9940 if (readonly_dynrelocs (h))
9941 {
9942 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
9943
9944 /* Not an error, just cut short the traversal. */
9945 return FALSE;
9946 }
9947 return TRUE;
9948 }
9949
9950 /* Set the sizes of the dynamic sections. */
9951
9952 static bfd_boolean
9953 ppc64_elf_size_dynamic_sections (bfd *output_bfd,
9954 struct bfd_link_info *info)
9955 {
9956 struct ppc_link_hash_table *htab;
9957 bfd *dynobj;
9958 asection *s;
9959 bfd_boolean relocs;
9960 bfd *ibfd;
9961 struct got_entry *first_tlsld;
9962
9963 htab = ppc_hash_table (info);
9964 if (htab == NULL)
9965 return FALSE;
9966
9967 dynobj = htab->elf.dynobj;
9968 if (dynobj == NULL)
9969 abort ();
9970
9971 if (htab->elf.dynamic_sections_created)
9972 {
9973 /* Set the contents of the .interp section to the interpreter. */
9974 if (bfd_link_executable (info) && !info->nointerp)
9975 {
9976 s = bfd_get_linker_section (dynobj, ".interp");
9977 if (s == NULL)
9978 abort ();
9979 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
9980 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
9981 }
9982 }
9983
9984 /* Set up .got offsets for local syms, and space for local dynamic
9985 relocs. */
9986 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
9987 {
9988 struct got_entry **lgot_ents;
9989 struct got_entry **end_lgot_ents;
9990 struct plt_entry **local_plt;
9991 struct plt_entry **end_local_plt;
9992 unsigned char *lgot_masks;
9993 bfd_size_type locsymcount;
9994 Elf_Internal_Shdr *symtab_hdr;
9995
9996 if (!is_ppc64_elf (ibfd))
9997 continue;
9998
9999 for (s = ibfd->sections; s != NULL; s = s->next)
10000 {
10001 struct ppc_dyn_relocs *p;
10002
10003 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
10004 {
10005 if (!bfd_is_abs_section (p->sec)
10006 && bfd_is_abs_section (p->sec->output_section))
10007 {
10008 /* Input section has been discarded, either because
10009 it is a copy of a linkonce section or due to
10010 linker script /DISCARD/, so we'll be discarding
10011 the relocs too. */
10012 }
10013 else if (p->count != 0)
10014 {
10015 asection *srel = elf_section_data (p->sec)->sreloc;
10016 if (p->ifunc)
10017 srel = htab->elf.irelplt;
10018 srel->size += p->count * sizeof (Elf64_External_Rela);
10019 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
10020 info->flags |= DF_TEXTREL;
10021 }
10022 }
10023 }
10024
10025 lgot_ents = elf_local_got_ents (ibfd);
10026 if (!lgot_ents)
10027 continue;
10028
10029 symtab_hdr = &elf_symtab_hdr (ibfd);
10030 locsymcount = symtab_hdr->sh_info;
10031 end_lgot_ents = lgot_ents + locsymcount;
10032 local_plt = (struct plt_entry **) end_lgot_ents;
10033 end_local_plt = local_plt + locsymcount;
10034 lgot_masks = (unsigned char *) end_local_plt;
10035 s = ppc64_elf_tdata (ibfd)->got;
10036 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
10037 {
10038 struct got_entry **pent, *ent;
10039
10040 pent = lgot_ents;
10041 while ((ent = *pent) != NULL)
10042 if (ent->got.refcount > 0)
10043 {
10044 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
10045 {
10046 ppc64_tlsld_got (ibfd)->got.refcount += 1;
10047 *pent = ent->next;
10048 }
10049 else
10050 {
10051 unsigned int ent_size = 8;
10052 unsigned int rel_size = sizeof (Elf64_External_Rela);
10053
10054 ent->got.offset = s->size;
10055 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
10056 {
10057 ent_size *= 2;
10058 rel_size *= 2;
10059 }
10060 s->size += ent_size;
10061 if ((*lgot_masks & PLT_IFUNC) != 0)
10062 {
10063 htab->elf.irelplt->size += rel_size;
10064 htab->got_reli_size += rel_size;
10065 }
10066 else if (bfd_link_pic (info))
10067 {
10068 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
10069 srel->size += rel_size;
10070 }
10071 pent = &ent->next;
10072 }
10073 }
10074 else
10075 *pent = ent->next;
10076 }
10077
10078 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
10079 for (; local_plt < end_local_plt; ++local_plt)
10080 {
10081 struct plt_entry *ent;
10082
10083 for (ent = *local_plt; ent != NULL; ent = ent->next)
10084 if (ent->plt.refcount > 0)
10085 {
10086 s = htab->elf.iplt;
10087 ent->plt.offset = s->size;
10088 s->size += PLT_ENTRY_SIZE (htab);
10089
10090 htab->elf.irelplt->size += sizeof (Elf64_External_Rela);
10091 }
10092 else
10093 ent->plt.offset = (bfd_vma) -1;
10094 }
10095 }
10096
10097 /* Allocate global sym .plt and .got entries, and space for global
10098 sym dynamic relocs. */
10099 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
10100 /* Stash the end of glink branch table. */
10101 if (htab->glink != NULL)
10102 htab->glink->rawsize = htab->glink->size;
10103
10104 if (!htab->opd_abi && !bfd_link_pic (info))
10105 elf_link_hash_traverse (&htab->elf, size_global_entry_stubs, info);
10106
10107 first_tlsld = NULL;
10108 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
10109 {
10110 struct got_entry *ent;
10111
10112 if (!is_ppc64_elf (ibfd))
10113 continue;
10114
10115 ent = ppc64_tlsld_got (ibfd);
10116 if (ent->got.refcount > 0)
10117 {
10118 if (!htab->do_multi_toc && first_tlsld != NULL)
10119 {
10120 ent->is_indirect = TRUE;
10121 ent->got.ent = first_tlsld;
10122 }
10123 else
10124 {
10125 if (first_tlsld == NULL)
10126 first_tlsld = ent;
10127 s = ppc64_elf_tdata (ibfd)->got;
10128 ent->got.offset = s->size;
10129 ent->owner = ibfd;
10130 s->size += 16;
10131 if (bfd_link_pic (info))
10132 {
10133 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
10134 srel->size += sizeof (Elf64_External_Rela);
10135 }
10136 }
10137 }
10138 else
10139 ent->got.offset = (bfd_vma) -1;
10140 }
10141
10142 /* We now have determined the sizes of the various dynamic sections.
10143 Allocate memory for them. */
10144 relocs = FALSE;
10145 for (s = dynobj->sections; s != NULL; s = s->next)
10146 {
10147 if ((s->flags & SEC_LINKER_CREATED) == 0)
10148 continue;
10149
10150 if (s == htab->brlt || s == htab->relbrlt)
10151 /* These haven't been allocated yet; don't strip. */
10152 continue;
10153 else if (s == htab->elf.sgot
10154 || s == htab->elf.splt
10155 || s == htab->elf.iplt
10156 || s == htab->glink
10157 || s == htab->dynbss)
10158 {
10159 /* Strip this section if we don't need it; see the
10160 comment below. */
10161 }
10162 else if (s == htab->glink_eh_frame)
10163 {
10164 if (!bfd_is_abs_section (s->output_section))
10165 /* Not sized yet. */
10166 continue;
10167 }
10168 else if (CONST_STRNEQ (s->name, ".rela"))
10169 {
10170 if (s->size != 0)
10171 {
10172 if (s != htab->elf.srelplt)
10173 relocs = TRUE;
10174
10175 /* We use the reloc_count field as a counter if we need
10176 to copy relocs into the output file. */
10177 s->reloc_count = 0;
10178 }
10179 }
10180 else
10181 {
10182 /* It's not one of our sections, so don't allocate space. */
10183 continue;
10184 }
10185
10186 if (s->size == 0)
10187 {
10188 /* If we don't need this section, strip it from the
10189 output file. This is mostly to handle .rela.bss and
10190 .rela.plt. We must create both sections in
10191 create_dynamic_sections, because they must be created
10192 before the linker maps input sections to output
10193 sections. The linker does that before
10194 adjust_dynamic_symbol is called, and it is that
10195 function which decides whether anything needs to go
10196 into these sections. */
10197 s->flags |= SEC_EXCLUDE;
10198 continue;
10199 }
10200
10201 if ((s->flags & SEC_HAS_CONTENTS) == 0)
10202 continue;
10203
10204 /* Allocate memory for the section contents. We use bfd_zalloc
10205 here in case unused entries are not reclaimed before the
10206 section's contents are written out. This should not happen,
10207 but this way if it does we get a R_PPC64_NONE reloc in .rela
10208 sections instead of garbage.
10209 We also rely on the section contents being zero when writing
10210 the GOT. */
10211 s->contents = bfd_zalloc (dynobj, s->size);
10212 if (s->contents == NULL)
10213 return FALSE;
10214 }
10215
10216 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
10217 {
10218 if (!is_ppc64_elf (ibfd))
10219 continue;
10220
10221 s = ppc64_elf_tdata (ibfd)->got;
10222 if (s != NULL && s != htab->elf.sgot)
10223 {
10224 if (s->size == 0)
10225 s->flags |= SEC_EXCLUDE;
10226 else
10227 {
10228 s->contents = bfd_zalloc (ibfd, s->size);
10229 if (s->contents == NULL)
10230 return FALSE;
10231 }
10232 }
10233 s = ppc64_elf_tdata (ibfd)->relgot;
10234 if (s != NULL)
10235 {
10236 if (s->size == 0)
10237 s->flags |= SEC_EXCLUDE;
10238 else
10239 {
10240 s->contents = bfd_zalloc (ibfd, s->size);
10241 if (s->contents == NULL)
10242 return FALSE;
10243 relocs = TRUE;
10244 s->reloc_count = 0;
10245 }
10246 }
10247 }
10248
10249 if (htab->elf.dynamic_sections_created)
10250 {
10251 bfd_boolean tls_opt;
10252
10253 /* Add some entries to the .dynamic section. We fill in the
10254 values later, in ppc64_elf_finish_dynamic_sections, but we
10255 must add the entries now so that we get the correct size for
10256 the .dynamic section. The DT_DEBUG entry is filled in by the
10257 dynamic linker and used by the debugger. */
10258 #define add_dynamic_entry(TAG, VAL) \
10259 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
10260
10261 if (bfd_link_executable (info))
10262 {
10263 if (!add_dynamic_entry (DT_DEBUG, 0))
10264 return FALSE;
10265 }
10266
10267 if (htab->elf.splt != NULL && htab->elf.splt->size != 0)
10268 {
10269 if (!add_dynamic_entry (DT_PLTGOT, 0)
10270 || !add_dynamic_entry (DT_PLTRELSZ, 0)
10271 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
10272 || !add_dynamic_entry (DT_JMPREL, 0)
10273 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
10274 return FALSE;
10275 }
10276
10277 if (NO_OPD_RELOCS && abiversion (output_bfd) <= 1)
10278 {
10279 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
10280 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
10281 return FALSE;
10282 }
10283
10284 tls_opt = (htab->params->tls_get_addr_opt
10285 && htab->tls_get_addr_fd != NULL
10286 && htab->tls_get_addr_fd->elf.plt.plist != NULL);
10287 if (tls_opt || !htab->opd_abi)
10288 {
10289 if (!add_dynamic_entry (DT_PPC64_OPT, tls_opt ? PPC64_OPT_TLS : 0))
10290 return FALSE;
10291 }
10292
10293 if (relocs)
10294 {
10295 if (!add_dynamic_entry (DT_RELA, 0)
10296 || !add_dynamic_entry (DT_RELASZ, 0)
10297 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
10298 return FALSE;
10299
10300 /* If any dynamic relocs apply to a read-only section,
10301 then we need a DT_TEXTREL entry. */
10302 if ((info->flags & DF_TEXTREL) == 0)
10303 elf_link_hash_traverse (&htab->elf, maybe_set_textrel, info);
10304
10305 if ((info->flags & DF_TEXTREL) != 0)
10306 {
10307 if (!add_dynamic_entry (DT_TEXTREL, 0))
10308 return FALSE;
10309 }
10310 }
10311 }
10312 #undef add_dynamic_entry
10313
10314 return TRUE;
10315 }
10316
10317 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
10318
10319 static bfd_boolean
10320 ppc64_elf_hash_symbol (struct elf_link_hash_entry *h)
10321 {
10322 if (h->plt.plist != NULL
10323 && !h->def_regular
10324 && !h->pointer_equality_needed)
10325 return FALSE;
10326
10327 return _bfd_elf_hash_symbol (h);
10328 }
10329
10330 /* Determine the type of stub needed, if any, for a call. */
10331
10332 static inline enum ppc_stub_type
10333 ppc_type_of_stub (asection *input_sec,
10334 const Elf_Internal_Rela *rel,
10335 struct ppc_link_hash_entry **hash,
10336 struct plt_entry **plt_ent,
10337 bfd_vma destination,
10338 unsigned long local_off)
10339 {
10340 struct ppc_link_hash_entry *h = *hash;
10341 bfd_vma location;
10342 bfd_vma branch_offset;
10343 bfd_vma max_branch_offset;
10344 enum elf_ppc64_reloc_type r_type;
10345
10346 if (h != NULL)
10347 {
10348 struct plt_entry *ent;
10349 struct ppc_link_hash_entry *fdh = h;
10350 if (h->oh != NULL
10351 && h->oh->is_func_descriptor)
10352 {
10353 fdh = ppc_follow_link (h->oh);
10354 *hash = fdh;
10355 }
10356
10357 for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next)
10358 if (ent->addend == rel->r_addend
10359 && ent->plt.offset != (bfd_vma) -1)
10360 {
10361 *plt_ent = ent;
10362 return ppc_stub_plt_call;
10363 }
10364
10365 /* Here, we know we don't have a plt entry. If we don't have a
10366 either a defined function descriptor or a defined entry symbol
10367 in a regular object file, then it is pointless trying to make
10368 any other type of stub. */
10369 if (!is_static_defined (&fdh->elf)
10370 && !is_static_defined (&h->elf))
10371 return ppc_stub_none;
10372 }
10373 else if (elf_local_got_ents (input_sec->owner) != NULL)
10374 {
10375 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (input_sec->owner);
10376 struct plt_entry **local_plt = (struct plt_entry **)
10377 elf_local_got_ents (input_sec->owner) + symtab_hdr->sh_info;
10378 unsigned long r_symndx = ELF64_R_SYM (rel->r_info);
10379
10380 if (local_plt[r_symndx] != NULL)
10381 {
10382 struct plt_entry *ent;
10383
10384 for (ent = local_plt[r_symndx]; ent != NULL; ent = ent->next)
10385 if (ent->addend == rel->r_addend
10386 && ent->plt.offset != (bfd_vma) -1)
10387 {
10388 *plt_ent = ent;
10389 return ppc_stub_plt_call;
10390 }
10391 }
10392 }
10393
10394 /* Determine where the call point is. */
10395 location = (input_sec->output_offset
10396 + input_sec->output_section->vma
10397 + rel->r_offset);
10398
10399 branch_offset = destination - location;
10400 r_type = ELF64_R_TYPE (rel->r_info);
10401
10402 /* Determine if a long branch stub is needed. */
10403 max_branch_offset = 1 << 25;
10404 if (r_type != R_PPC64_REL24)
10405 max_branch_offset = 1 << 15;
10406
10407 if (branch_offset + max_branch_offset >= 2 * max_branch_offset - local_off)
10408 /* We need a stub. Figure out whether a long_branch or plt_branch
10409 is needed later. */
10410 return ppc_stub_long_branch;
10411
10412 return ppc_stub_none;
10413 }
10414
10415 /* With power7 weakly ordered memory model, it is possible for ld.so
10416 to update a plt entry in one thread and have another thread see a
10417 stale zero toc entry. To avoid this we need some sort of acquire
10418 barrier in the call stub. One solution is to make the load of the
10419 toc word seem to appear to depend on the load of the function entry
10420 word. Another solution is to test for r2 being zero, and branch to
10421 the appropriate glink entry if so.
10422
10423 . fake dep barrier compare
10424 . ld 12,xxx(2) ld 12,xxx(2)
10425 . mtctr 12 mtctr 12
10426 . xor 11,12,12 ld 2,xxx+8(2)
10427 . add 2,2,11 cmpldi 2,0
10428 . ld 2,xxx+8(2) bnectr+
10429 . bctr b <glink_entry>
10430
10431 The solution involving the compare turns out to be faster, so
10432 that's what we use unless the branch won't reach. */
10433
10434 #define ALWAYS_USE_FAKE_DEP 0
10435 #define ALWAYS_EMIT_R2SAVE 0
10436
10437 #define PPC_LO(v) ((v) & 0xffff)
10438 #define PPC_HI(v) (((v) >> 16) & 0xffff)
10439 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
10440
10441 static inline unsigned int
10442 plt_stub_size (struct ppc_link_hash_table *htab,
10443 struct ppc_stub_hash_entry *stub_entry,
10444 bfd_vma off)
10445 {
10446 unsigned size = 12;
10447
10448 if (ALWAYS_EMIT_R2SAVE
10449 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10450 size += 4;
10451 if (PPC_HA (off) != 0)
10452 size += 4;
10453 if (htab->opd_abi)
10454 {
10455 size += 4;
10456 if (htab->params->plt_static_chain)
10457 size += 4;
10458 if (htab->params->plt_thread_safe
10459 && htab->elf.dynamic_sections_created
10460 && stub_entry->h != NULL
10461 && stub_entry->h->elf.dynindx != -1)
10462 size += 8;
10463 if (PPC_HA (off + 8 + 8 * htab->params->plt_static_chain) != PPC_HA (off))
10464 size += 4;
10465 }
10466 if (stub_entry->h != NULL
10467 && (stub_entry->h == htab->tls_get_addr_fd
10468 || stub_entry->h == htab->tls_get_addr)
10469 && htab->params->tls_get_addr_opt)
10470 size += 13 * 4;
10471 return size;
10472 }
10473
10474 /* If this stub would cross fewer 2**plt_stub_align boundaries if we align,
10475 then return the padding needed to do so. */
10476 static inline unsigned int
10477 plt_stub_pad (struct ppc_link_hash_table *htab,
10478 struct ppc_stub_hash_entry *stub_entry,
10479 bfd_vma plt_off)
10480 {
10481 int stub_align = 1 << htab->params->plt_stub_align;
10482 unsigned stub_size = plt_stub_size (htab, stub_entry, plt_off);
10483 bfd_vma stub_off = stub_entry->group->stub_sec->size;
10484
10485 if (((stub_off + stub_size - 1) & -stub_align) - (stub_off & -stub_align)
10486 > ((stub_size - 1) & -stub_align))
10487 return stub_align - (stub_off & (stub_align - 1));
10488 return 0;
10489 }
10490
10491 /* Build a .plt call stub. */
10492
10493 static inline bfd_byte *
10494 build_plt_stub (struct ppc_link_hash_table *htab,
10495 struct ppc_stub_hash_entry *stub_entry,
10496 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
10497 {
10498 bfd *obfd = htab->params->stub_bfd;
10499 bfd_boolean plt_load_toc = htab->opd_abi;
10500 bfd_boolean plt_static_chain = htab->params->plt_static_chain;
10501 bfd_boolean plt_thread_safe = (htab->params->plt_thread_safe
10502 && htab->elf.dynamic_sections_created
10503 && stub_entry->h != NULL
10504 && stub_entry->h->elf.dynindx != -1);
10505 bfd_boolean use_fake_dep = plt_thread_safe;
10506 bfd_vma cmp_branch_off = 0;
10507
10508 if (!ALWAYS_USE_FAKE_DEP
10509 && plt_load_toc
10510 && plt_thread_safe
10511 && !((stub_entry->h == htab->tls_get_addr_fd
10512 || stub_entry->h == htab->tls_get_addr)
10513 && htab->params->tls_get_addr_opt))
10514 {
10515 bfd_vma pltoff = stub_entry->plt_ent->plt.offset & ~1;
10516 bfd_vma pltindex = ((pltoff - PLT_INITIAL_ENTRY_SIZE (htab))
10517 / PLT_ENTRY_SIZE (htab));
10518 bfd_vma glinkoff = GLINK_CALL_STUB_SIZE + pltindex * 8;
10519 bfd_vma to, from;
10520
10521 if (pltindex > 32768)
10522 glinkoff += (pltindex - 32768) * 4;
10523 to = (glinkoff
10524 + htab->glink->output_offset
10525 + htab->glink->output_section->vma);
10526 from = (p - stub_entry->group->stub_sec->contents
10527 + 4 * (ALWAYS_EMIT_R2SAVE
10528 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10529 + 4 * (PPC_HA (offset) != 0)
10530 + 4 * (PPC_HA (offset + 8 + 8 * plt_static_chain)
10531 != PPC_HA (offset))
10532 + 4 * (plt_static_chain != 0)
10533 + 20
10534 + stub_entry->group->stub_sec->output_offset
10535 + stub_entry->group->stub_sec->output_section->vma);
10536 cmp_branch_off = to - from;
10537 use_fake_dep = cmp_branch_off + (1 << 25) >= (1 << 26);
10538 }
10539
10540 if (PPC_HA (offset) != 0)
10541 {
10542 if (r != NULL)
10543 {
10544 if (ALWAYS_EMIT_R2SAVE
10545 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10546 r[0].r_offset += 4;
10547 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
10548 r[1].r_offset = r[0].r_offset + 4;
10549 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10550 r[1].r_addend = r[0].r_addend;
10551 if (plt_load_toc)
10552 {
10553 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10554 {
10555 r[2].r_offset = r[1].r_offset + 4;
10556 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO);
10557 r[2].r_addend = r[0].r_addend;
10558 }
10559 else
10560 {
10561 r[2].r_offset = r[1].r_offset + 8 + 8 * use_fake_dep;
10562 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10563 r[2].r_addend = r[0].r_addend + 8;
10564 if (plt_static_chain)
10565 {
10566 r[3].r_offset = r[2].r_offset + 4;
10567 r[3].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10568 r[3].r_addend = r[0].r_addend + 16;
10569 }
10570 }
10571 }
10572 }
10573 if (ALWAYS_EMIT_R2SAVE
10574 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10575 bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p), p += 4;
10576 if (plt_load_toc)
10577 {
10578 bfd_put_32 (obfd, ADDIS_R11_R2 | PPC_HA (offset), p), p += 4;
10579 bfd_put_32 (obfd, LD_R12_0R11 | PPC_LO (offset), p), p += 4;
10580 }
10581 else
10582 {
10583 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
10584 bfd_put_32 (obfd, LD_R12_0R12 | PPC_LO (offset), p), p += 4;
10585 }
10586 if (plt_load_toc
10587 && PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10588 {
10589 bfd_put_32 (obfd, ADDI_R11_R11 | PPC_LO (offset), p), p += 4;
10590 offset = 0;
10591 }
10592 bfd_put_32 (obfd, MTCTR_R12, p), p += 4;
10593 if (plt_load_toc)
10594 {
10595 if (use_fake_dep)
10596 {
10597 bfd_put_32 (obfd, XOR_R2_R12_R12, p), p += 4;
10598 bfd_put_32 (obfd, ADD_R11_R11_R2, p), p += 4;
10599 }
10600 bfd_put_32 (obfd, LD_R2_0R11 | PPC_LO (offset + 8), p), p += 4;
10601 if (plt_static_chain)
10602 bfd_put_32 (obfd, LD_R11_0R11 | PPC_LO (offset + 16), p), p += 4;
10603 }
10604 }
10605 else
10606 {
10607 if (r != NULL)
10608 {
10609 if (ALWAYS_EMIT_R2SAVE
10610 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10611 r[0].r_offset += 4;
10612 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10613 if (plt_load_toc)
10614 {
10615 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10616 {
10617 r[1].r_offset = r[0].r_offset + 4;
10618 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16);
10619 r[1].r_addend = r[0].r_addend;
10620 }
10621 else
10622 {
10623 r[1].r_offset = r[0].r_offset + 8 + 8 * use_fake_dep;
10624 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10625 r[1].r_addend = r[0].r_addend + 8 + 8 * plt_static_chain;
10626 if (plt_static_chain)
10627 {
10628 r[2].r_offset = r[1].r_offset + 4;
10629 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10630 r[2].r_addend = r[0].r_addend + 8;
10631 }
10632 }
10633 }
10634 }
10635 if (ALWAYS_EMIT_R2SAVE
10636 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10637 bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p), p += 4;
10638 bfd_put_32 (obfd, LD_R12_0R2 | PPC_LO (offset), p), p += 4;
10639 if (plt_load_toc
10640 && PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10641 {
10642 bfd_put_32 (obfd, ADDI_R2_R2 | PPC_LO (offset), p), p += 4;
10643 offset = 0;
10644 }
10645 bfd_put_32 (obfd, MTCTR_R12, p), p += 4;
10646 if (plt_load_toc)
10647 {
10648 if (use_fake_dep)
10649 {
10650 bfd_put_32 (obfd, XOR_R11_R12_R12, p), p += 4;
10651 bfd_put_32 (obfd, ADD_R2_R2_R11, p), p += 4;
10652 }
10653 if (plt_static_chain)
10654 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset + 16), p), p += 4;
10655 bfd_put_32 (obfd, LD_R2_0R2 | PPC_LO (offset + 8), p), p += 4;
10656 }
10657 }
10658 if (plt_load_toc && plt_thread_safe && !use_fake_dep)
10659 {
10660 bfd_put_32 (obfd, CMPLDI_R2_0, p), p += 4;
10661 bfd_put_32 (obfd, BNECTR_P4, p), p += 4;
10662 bfd_put_32 (obfd, B_DOT | (cmp_branch_off & 0x3fffffc), p), p += 4;
10663 }
10664 else
10665 bfd_put_32 (obfd, BCTR, p), p += 4;
10666 return p;
10667 }
10668
10669 /* Build a special .plt call stub for __tls_get_addr. */
10670
10671 #define LD_R11_0R3 0xe9630000
10672 #define LD_R12_0R3 0xe9830000
10673 #define MR_R0_R3 0x7c601b78
10674 #define CMPDI_R11_0 0x2c2b0000
10675 #define ADD_R3_R12_R13 0x7c6c6a14
10676 #define BEQLR 0x4d820020
10677 #define MR_R3_R0 0x7c030378
10678 #define STD_R11_0R1 0xf9610000
10679 #define BCTRL 0x4e800421
10680 #define LD_R11_0R1 0xe9610000
10681 #define MTLR_R11 0x7d6803a6
10682
10683 static inline bfd_byte *
10684 build_tls_get_addr_stub (struct ppc_link_hash_table *htab,
10685 struct ppc_stub_hash_entry *stub_entry,
10686 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
10687 {
10688 bfd *obfd = htab->params->stub_bfd;
10689
10690 bfd_put_32 (obfd, LD_R11_0R3 + 0, p), p += 4;
10691 bfd_put_32 (obfd, LD_R12_0R3 + 8, p), p += 4;
10692 bfd_put_32 (obfd, MR_R0_R3, p), p += 4;
10693 bfd_put_32 (obfd, CMPDI_R11_0, p), p += 4;
10694 bfd_put_32 (obfd, ADD_R3_R12_R13, p), p += 4;
10695 bfd_put_32 (obfd, BEQLR, p), p += 4;
10696 bfd_put_32 (obfd, MR_R3_R0, p), p += 4;
10697 bfd_put_32 (obfd, MFLR_R11, p), p += 4;
10698 bfd_put_32 (obfd, STD_R11_0R1 + STK_LINKER (htab), p), p += 4;
10699
10700 if (r != NULL)
10701 r[0].r_offset += 9 * 4;
10702 p = build_plt_stub (htab, stub_entry, p, offset, r);
10703 bfd_put_32 (obfd, BCTRL, p - 4);
10704
10705 bfd_put_32 (obfd, LD_R2_0R1 + STK_TOC (htab), p), p += 4;
10706 bfd_put_32 (obfd, LD_R11_0R1 + STK_LINKER (htab), p), p += 4;
10707 bfd_put_32 (obfd, MTLR_R11, p), p += 4;
10708 bfd_put_32 (obfd, BLR, p), p += 4;
10709
10710 return p;
10711 }
10712
10713 static Elf_Internal_Rela *
10714 get_relocs (asection *sec, int count)
10715 {
10716 Elf_Internal_Rela *relocs;
10717 struct bfd_elf_section_data *elfsec_data;
10718
10719 elfsec_data = elf_section_data (sec);
10720 relocs = elfsec_data->relocs;
10721 if (relocs == NULL)
10722 {
10723 bfd_size_type relsize;
10724 relsize = sec->reloc_count * sizeof (*relocs);
10725 relocs = bfd_alloc (sec->owner, relsize);
10726 if (relocs == NULL)
10727 return NULL;
10728 elfsec_data->relocs = relocs;
10729 elfsec_data->rela.hdr = bfd_zalloc (sec->owner,
10730 sizeof (Elf_Internal_Shdr));
10731 if (elfsec_data->rela.hdr == NULL)
10732 return NULL;
10733 elfsec_data->rela.hdr->sh_size = (sec->reloc_count
10734 * sizeof (Elf64_External_Rela));
10735 elfsec_data->rela.hdr->sh_entsize = sizeof (Elf64_External_Rela);
10736 sec->reloc_count = 0;
10737 }
10738 relocs += sec->reloc_count;
10739 sec->reloc_count += count;
10740 return relocs;
10741 }
10742
10743 static bfd_vma
10744 get_r2off (struct bfd_link_info *info,
10745 struct ppc_stub_hash_entry *stub_entry)
10746 {
10747 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10748 bfd_vma r2off = htab->sec_info[stub_entry->target_section->id].toc_off;
10749
10750 if (r2off == 0)
10751 {
10752 /* Support linking -R objects. Get the toc pointer from the
10753 opd entry. */
10754 char buf[8];
10755 if (!htab->opd_abi)
10756 return r2off;
10757 asection *opd = stub_entry->h->elf.root.u.def.section;
10758 bfd_vma opd_off = stub_entry->h->elf.root.u.def.value;
10759
10760 if (strcmp (opd->name, ".opd") != 0
10761 || opd->reloc_count != 0)
10762 {
10763 info->callbacks->einfo (_("%P: cannot find opd entry toc for `%T'\n"),
10764 stub_entry->h->elf.root.root.string);
10765 bfd_set_error (bfd_error_bad_value);
10766 return (bfd_vma) -1;
10767 }
10768 if (!bfd_get_section_contents (opd->owner, opd, buf, opd_off + 8, 8))
10769 return (bfd_vma) -1;
10770 r2off = bfd_get_64 (opd->owner, buf);
10771 r2off -= elf_gp (info->output_bfd);
10772 }
10773 r2off -= htab->sec_info[stub_entry->group->link_sec->id].toc_off;
10774 return r2off;
10775 }
10776
10777 static bfd_boolean
10778 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
10779 {
10780 struct ppc_stub_hash_entry *stub_entry;
10781 struct ppc_branch_hash_entry *br_entry;
10782 struct bfd_link_info *info;
10783 struct ppc_link_hash_table *htab;
10784 bfd_byte *loc;
10785 bfd_byte *p;
10786 bfd_vma dest, off;
10787 int size;
10788 Elf_Internal_Rela *r;
10789 asection *plt;
10790
10791 /* Massage our args to the form they really have. */
10792 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
10793 info = in_arg;
10794
10795 htab = ppc_hash_table (info);
10796 if (htab == NULL)
10797 return FALSE;
10798
10799 /* Make a note of the offset within the stubs for this entry. */
10800 stub_entry->stub_offset = stub_entry->group->stub_sec->size;
10801 loc = stub_entry->group->stub_sec->contents + stub_entry->stub_offset;
10802
10803 htab->stub_count[stub_entry->stub_type - 1] += 1;
10804 switch (stub_entry->stub_type)
10805 {
10806 case ppc_stub_long_branch:
10807 case ppc_stub_long_branch_r2off:
10808 /* Branches are relative. This is where we are going to. */
10809 dest = (stub_entry->target_value
10810 + stub_entry->target_section->output_offset
10811 + stub_entry->target_section->output_section->vma);
10812 dest += PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
10813 off = dest;
10814
10815 /* And this is where we are coming from. */
10816 off -= (stub_entry->stub_offset
10817 + stub_entry->group->stub_sec->output_offset
10818 + stub_entry->group->stub_sec->output_section->vma);
10819
10820 size = 4;
10821 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
10822 {
10823 bfd_vma r2off = get_r2off (info, stub_entry);
10824
10825 if (r2off == (bfd_vma) -1)
10826 {
10827 htab->stub_error = TRUE;
10828 return FALSE;
10829 }
10830 bfd_put_32 (htab->params->stub_bfd, STD_R2_0R1 + STK_TOC (htab), loc);
10831 loc += 4;
10832 size = 8;
10833 if (PPC_HA (r2off) != 0)
10834 {
10835 bfd_put_32 (htab->params->stub_bfd,
10836 ADDIS_R2_R2 | PPC_HA (r2off), loc);
10837 loc += 4;
10838 size += 4;
10839 }
10840 if (PPC_LO (r2off) != 0)
10841 {
10842 bfd_put_32 (htab->params->stub_bfd,
10843 ADDI_R2_R2 | PPC_LO (r2off), loc);
10844 loc += 4;
10845 size += 4;
10846 }
10847 off -= size - 4;
10848 }
10849 bfd_put_32 (htab->params->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
10850
10851 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
10852 {
10853 info->callbacks->einfo
10854 (_("%P: long branch stub `%s' offset overflow\n"),
10855 stub_entry->root.string);
10856 htab->stub_error = TRUE;
10857 return FALSE;
10858 }
10859
10860 if (info->emitrelocations)
10861 {
10862 r = get_relocs (stub_entry->group->stub_sec, 1);
10863 if (r == NULL)
10864 return FALSE;
10865 r->r_offset = loc - stub_entry->group->stub_sec->contents;
10866 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
10867 r->r_addend = dest;
10868 if (stub_entry->h != NULL)
10869 {
10870 struct elf_link_hash_entry **hashes;
10871 unsigned long symndx;
10872 struct ppc_link_hash_entry *h;
10873
10874 hashes = elf_sym_hashes (htab->params->stub_bfd);
10875 if (hashes == NULL)
10876 {
10877 bfd_size_type hsize;
10878
10879 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
10880 hashes = bfd_zalloc (htab->params->stub_bfd, hsize);
10881 if (hashes == NULL)
10882 return FALSE;
10883 elf_sym_hashes (htab->params->stub_bfd) = hashes;
10884 htab->stub_globals = 1;
10885 }
10886 symndx = htab->stub_globals++;
10887 h = stub_entry->h;
10888 hashes[symndx] = &h->elf;
10889 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
10890 if (h->oh != NULL && h->oh->is_func)
10891 h = ppc_follow_link (h->oh);
10892 if (h->elf.root.u.def.section != stub_entry->target_section)
10893 /* H is an opd symbol. The addend must be zero. */
10894 r->r_addend = 0;
10895 else
10896 {
10897 off = (h->elf.root.u.def.value
10898 + h->elf.root.u.def.section->output_offset
10899 + h->elf.root.u.def.section->output_section->vma);
10900 r->r_addend -= off;
10901 }
10902 }
10903 }
10904 break;
10905
10906 case ppc_stub_plt_branch:
10907 case ppc_stub_plt_branch_r2off:
10908 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
10909 stub_entry->root.string + 9,
10910 FALSE, FALSE);
10911 if (br_entry == NULL)
10912 {
10913 info->callbacks->einfo (_("%P: can't find branch stub `%s'\n"),
10914 stub_entry->root.string);
10915 htab->stub_error = TRUE;
10916 return FALSE;
10917 }
10918
10919 dest = (stub_entry->target_value
10920 + stub_entry->target_section->output_offset
10921 + stub_entry->target_section->output_section->vma);
10922 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
10923 dest += PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
10924
10925 bfd_put_64 (htab->brlt->owner, dest,
10926 htab->brlt->contents + br_entry->offset);
10927
10928 if (br_entry->iter == htab->stub_iteration)
10929 {
10930 br_entry->iter = 0;
10931
10932 if (htab->relbrlt != NULL)
10933 {
10934 /* Create a reloc for the branch lookup table entry. */
10935 Elf_Internal_Rela rela;
10936 bfd_byte *rl;
10937
10938 rela.r_offset = (br_entry->offset
10939 + htab->brlt->output_offset
10940 + htab->brlt->output_section->vma);
10941 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
10942 rela.r_addend = dest;
10943
10944 rl = htab->relbrlt->contents;
10945 rl += (htab->relbrlt->reloc_count++
10946 * sizeof (Elf64_External_Rela));
10947 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
10948 }
10949 else if (info->emitrelocations)
10950 {
10951 r = get_relocs (htab->brlt, 1);
10952 if (r == NULL)
10953 return FALSE;
10954 /* brlt, being SEC_LINKER_CREATED does not go through the
10955 normal reloc processing. Symbols and offsets are not
10956 translated from input file to output file form, so
10957 set up the offset per the output file. */
10958 r->r_offset = (br_entry->offset
10959 + htab->brlt->output_offset
10960 + htab->brlt->output_section->vma);
10961 r->r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
10962 r->r_addend = dest;
10963 }
10964 }
10965
10966 dest = (br_entry->offset
10967 + htab->brlt->output_offset
10968 + htab->brlt->output_section->vma);
10969
10970 off = (dest
10971 - elf_gp (htab->brlt->output_section->owner)
10972 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
10973
10974 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
10975 {
10976 info->callbacks->einfo
10977 (_("%P: linkage table error against `%T'\n"),
10978 stub_entry->root.string);
10979 bfd_set_error (bfd_error_bad_value);
10980 htab->stub_error = TRUE;
10981 return FALSE;
10982 }
10983
10984 if (info->emitrelocations)
10985 {
10986 r = get_relocs (stub_entry->group->stub_sec, 1 + (PPC_HA (off) != 0));
10987 if (r == NULL)
10988 return FALSE;
10989 r[0].r_offset = loc - stub_entry->group->stub_sec->contents;
10990 if (bfd_big_endian (info->output_bfd))
10991 r[0].r_offset += 2;
10992 if (stub_entry->stub_type == ppc_stub_plt_branch_r2off)
10993 r[0].r_offset += 4;
10994 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10995 r[0].r_addend = dest;
10996 if (PPC_HA (off) != 0)
10997 {
10998 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
10999 r[1].r_offset = r[0].r_offset + 4;
11000 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
11001 r[1].r_addend = r[0].r_addend;
11002 }
11003 }
11004
11005 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
11006 {
11007 if (PPC_HA (off) != 0)
11008 {
11009 size = 16;
11010 bfd_put_32 (htab->params->stub_bfd,
11011 ADDIS_R12_R2 | PPC_HA (off), loc);
11012 loc += 4;
11013 bfd_put_32 (htab->params->stub_bfd,
11014 LD_R12_0R12 | PPC_LO (off), loc);
11015 }
11016 else
11017 {
11018 size = 12;
11019 bfd_put_32 (htab->params->stub_bfd,
11020 LD_R12_0R2 | PPC_LO (off), loc);
11021 }
11022 }
11023 else
11024 {
11025 bfd_vma r2off = get_r2off (info, stub_entry);
11026
11027 if (r2off == (bfd_vma) -1)
11028 {
11029 htab->stub_error = TRUE;
11030 return FALSE;
11031 }
11032
11033 bfd_put_32 (htab->params->stub_bfd, STD_R2_0R1 + STK_TOC (htab), loc);
11034 loc += 4;
11035 size = 16;
11036 if (PPC_HA (off) != 0)
11037 {
11038 size += 4;
11039 bfd_put_32 (htab->params->stub_bfd,
11040 ADDIS_R12_R2 | PPC_HA (off), loc);
11041 loc += 4;
11042 bfd_put_32 (htab->params->stub_bfd,
11043 LD_R12_0R12 | PPC_LO (off), loc);
11044 }
11045 else
11046 bfd_put_32 (htab->params->stub_bfd, LD_R12_0R2 | PPC_LO (off), loc);
11047
11048 if (PPC_HA (r2off) != 0)
11049 {
11050 size += 4;
11051 loc += 4;
11052 bfd_put_32 (htab->params->stub_bfd,
11053 ADDIS_R2_R2 | PPC_HA (r2off), loc);
11054 }
11055 if (PPC_LO (r2off) != 0)
11056 {
11057 size += 4;
11058 loc += 4;
11059 bfd_put_32 (htab->params->stub_bfd,
11060 ADDI_R2_R2 | PPC_LO (r2off), loc);
11061 }
11062 }
11063 loc += 4;
11064 bfd_put_32 (htab->params->stub_bfd, MTCTR_R12, loc);
11065 loc += 4;
11066 bfd_put_32 (htab->params->stub_bfd, BCTR, loc);
11067 break;
11068
11069 case ppc_stub_plt_call:
11070 case ppc_stub_plt_call_r2save:
11071 if (stub_entry->h != NULL
11072 && stub_entry->h->is_func_descriptor
11073 && stub_entry->h->oh != NULL)
11074 {
11075 struct ppc_link_hash_entry *fh = ppc_follow_link (stub_entry->h->oh);
11076
11077 /* If the old-ABI "dot-symbol" is undefined make it weak so
11078 we don't get a link error from RELOC_FOR_GLOBAL_SYMBOL. */
11079 if (fh->elf.root.type == bfd_link_hash_undefined)
11080 fh->elf.root.type = bfd_link_hash_undefweak;
11081 /* Stop undo_symbol_twiddle changing it back to undefined. */
11082 fh->was_undefined = 0;
11083 }
11084
11085 /* Now build the stub. */
11086 dest = stub_entry->plt_ent->plt.offset & ~1;
11087 if (dest >= (bfd_vma) -2)
11088 abort ();
11089
11090 plt = htab->elf.splt;
11091 if (!htab->elf.dynamic_sections_created
11092 || stub_entry->h == NULL
11093 || stub_entry->h->elf.dynindx == -1)
11094 plt = htab->elf.iplt;
11095
11096 dest += plt->output_offset + plt->output_section->vma;
11097
11098 if (stub_entry->h == NULL
11099 && (stub_entry->plt_ent->plt.offset & 1) == 0)
11100 {
11101 Elf_Internal_Rela rela;
11102 bfd_byte *rl;
11103
11104 rela.r_offset = dest;
11105 if (htab->opd_abi)
11106 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
11107 else
11108 rela.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
11109 rela.r_addend = (stub_entry->target_value
11110 + stub_entry->target_section->output_offset
11111 + stub_entry->target_section->output_section->vma);
11112
11113 rl = (htab->elf.irelplt->contents
11114 + (htab->elf.irelplt->reloc_count++
11115 * sizeof (Elf64_External_Rela)));
11116 bfd_elf64_swap_reloca_out (info->output_bfd, &rela, rl);
11117 stub_entry->plt_ent->plt.offset |= 1;
11118 }
11119
11120 off = (dest
11121 - elf_gp (plt->output_section->owner)
11122 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11123
11124 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
11125 {
11126 info->callbacks->einfo
11127 (_("%P: linkage table error against `%T'\n"),
11128 stub_entry->h != NULL
11129 ? stub_entry->h->elf.root.root.string
11130 : "<local sym>");
11131 bfd_set_error (bfd_error_bad_value);
11132 htab->stub_error = TRUE;
11133 return FALSE;
11134 }
11135
11136 if (htab->params->plt_stub_align != 0)
11137 {
11138 unsigned pad = plt_stub_pad (htab, stub_entry, off);
11139
11140 stub_entry->group->stub_sec->size += pad;
11141 stub_entry->stub_offset = stub_entry->group->stub_sec->size;
11142 loc += pad;
11143 }
11144
11145 r = NULL;
11146 if (info->emitrelocations)
11147 {
11148 r = get_relocs (stub_entry->group->stub_sec,
11149 ((PPC_HA (off) != 0)
11150 + (htab->opd_abi
11151 ? 2 + (htab->params->plt_static_chain
11152 && PPC_HA (off + 16) == PPC_HA (off))
11153 : 1)));
11154 if (r == NULL)
11155 return FALSE;
11156 r[0].r_offset = loc - stub_entry->group->stub_sec->contents;
11157 if (bfd_big_endian (info->output_bfd))
11158 r[0].r_offset += 2;
11159 r[0].r_addend = dest;
11160 }
11161 if (stub_entry->h != NULL
11162 && (stub_entry->h == htab->tls_get_addr_fd
11163 || stub_entry->h == htab->tls_get_addr)
11164 && htab->params->tls_get_addr_opt)
11165 p = build_tls_get_addr_stub (htab, stub_entry, loc, off, r);
11166 else
11167 p = build_plt_stub (htab, stub_entry, loc, off, r);
11168 size = p - loc;
11169 break;
11170
11171 case ppc_stub_save_res:
11172 return TRUE;
11173
11174 default:
11175 BFD_FAIL ();
11176 return FALSE;
11177 }
11178
11179 stub_entry->group->stub_sec->size += size;
11180
11181 if (htab->params->emit_stub_syms)
11182 {
11183 struct elf_link_hash_entry *h;
11184 size_t len1, len2;
11185 char *name;
11186 const char *const stub_str[] = { "long_branch",
11187 "long_branch_r2off",
11188 "plt_branch",
11189 "plt_branch_r2off",
11190 "plt_call",
11191 "plt_call" };
11192
11193 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
11194 len2 = strlen (stub_entry->root.string);
11195 name = bfd_malloc (len1 + len2 + 2);
11196 if (name == NULL)
11197 return FALSE;
11198 memcpy (name, stub_entry->root.string, 9);
11199 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
11200 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
11201 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
11202 if (h == NULL)
11203 return FALSE;
11204 if (h->root.type == bfd_link_hash_new)
11205 {
11206 h->root.type = bfd_link_hash_defined;
11207 h->root.u.def.section = stub_entry->group->stub_sec;
11208 h->root.u.def.value = stub_entry->stub_offset;
11209 h->ref_regular = 1;
11210 h->def_regular = 1;
11211 h->ref_regular_nonweak = 1;
11212 h->forced_local = 1;
11213 h->non_elf = 0;
11214 h->root.linker_def = 1;
11215 }
11216 }
11217
11218 return TRUE;
11219 }
11220
11221 /* As above, but don't actually build the stub. Just bump offset so
11222 we know stub section sizes, and select plt_branch stubs where
11223 long_branch stubs won't do. */
11224
11225 static bfd_boolean
11226 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
11227 {
11228 struct ppc_stub_hash_entry *stub_entry;
11229 struct bfd_link_info *info;
11230 struct ppc_link_hash_table *htab;
11231 bfd_vma off;
11232 int size;
11233
11234 /* Massage our args to the form they really have. */
11235 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
11236 info = in_arg;
11237
11238 htab = ppc_hash_table (info);
11239 if (htab == NULL)
11240 return FALSE;
11241
11242 if (stub_entry->h != NULL
11243 && stub_entry->h->save_res
11244 && stub_entry->h->elf.root.type == bfd_link_hash_defined
11245 && stub_entry->h->elf.root.u.def.section == htab->sfpr)
11246 {
11247 /* Don't make stubs to out-of-line register save/restore
11248 functions. Instead, emit copies of the functions. */
11249 stub_entry->group->needs_save_res = 1;
11250 stub_entry->stub_type = ppc_stub_save_res;
11251 return TRUE;
11252 }
11253
11254 if (stub_entry->stub_type == ppc_stub_plt_call
11255 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
11256 {
11257 asection *plt;
11258 off = stub_entry->plt_ent->plt.offset & ~(bfd_vma) 1;
11259 if (off >= (bfd_vma) -2)
11260 abort ();
11261 plt = htab->elf.splt;
11262 if (!htab->elf.dynamic_sections_created
11263 || stub_entry->h == NULL
11264 || stub_entry->h->elf.dynindx == -1)
11265 plt = htab->elf.iplt;
11266 off += (plt->output_offset
11267 + plt->output_section->vma
11268 - elf_gp (plt->output_section->owner)
11269 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11270
11271 size = plt_stub_size (htab, stub_entry, off);
11272 if (htab->params->plt_stub_align)
11273 size += plt_stub_pad (htab, stub_entry, off);
11274 if (info->emitrelocations)
11275 {
11276 stub_entry->group->stub_sec->reloc_count
11277 += ((PPC_HA (off) != 0)
11278 + (htab->opd_abi
11279 ? 2 + (htab->params->plt_static_chain
11280 && PPC_HA (off + 16) == PPC_HA (off))
11281 : 1));
11282 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11283 }
11284 }
11285 else
11286 {
11287 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
11288 variants. */
11289 bfd_vma r2off = 0;
11290 bfd_vma local_off = 0;
11291
11292 off = (stub_entry->target_value
11293 + stub_entry->target_section->output_offset
11294 + stub_entry->target_section->output_section->vma);
11295 off -= (stub_entry->group->stub_sec->size
11296 + stub_entry->group->stub_sec->output_offset
11297 + stub_entry->group->stub_sec->output_section->vma);
11298
11299 /* Reset the stub type from the plt variant in case we now
11300 can reach with a shorter stub. */
11301 if (stub_entry->stub_type >= ppc_stub_plt_branch)
11302 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
11303
11304 size = 4;
11305 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
11306 {
11307 r2off = get_r2off (info, stub_entry);
11308 if (r2off == (bfd_vma) -1)
11309 {
11310 htab->stub_error = TRUE;
11311 return FALSE;
11312 }
11313 size = 8;
11314 if (PPC_HA (r2off) != 0)
11315 size += 4;
11316 if (PPC_LO (r2off) != 0)
11317 size += 4;
11318 off -= size - 4;
11319 }
11320
11321 local_off = PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
11322
11323 /* If the branch offset if too big, use a ppc_stub_plt_branch.
11324 Do the same for -R objects without function descriptors. */
11325 if (off + (1 << 25) >= (bfd_vma) (1 << 26) - local_off
11326 || (stub_entry->stub_type == ppc_stub_long_branch_r2off
11327 && r2off == 0
11328 && htab->sec_info[stub_entry->target_section->id].toc_off == 0))
11329 {
11330 struct ppc_branch_hash_entry *br_entry;
11331
11332 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
11333 stub_entry->root.string + 9,
11334 TRUE, FALSE);
11335 if (br_entry == NULL)
11336 {
11337 info->callbacks->einfo (_("%P: can't build branch stub `%s'\n"),
11338 stub_entry->root.string);
11339 htab->stub_error = TRUE;
11340 return FALSE;
11341 }
11342
11343 if (br_entry->iter != htab->stub_iteration)
11344 {
11345 br_entry->iter = htab->stub_iteration;
11346 br_entry->offset = htab->brlt->size;
11347 htab->brlt->size += 8;
11348
11349 if (htab->relbrlt != NULL)
11350 htab->relbrlt->size += sizeof (Elf64_External_Rela);
11351 else if (info->emitrelocations)
11352 {
11353 htab->brlt->reloc_count += 1;
11354 htab->brlt->flags |= SEC_RELOC;
11355 }
11356 }
11357
11358 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
11359 off = (br_entry->offset
11360 + htab->brlt->output_offset
11361 + htab->brlt->output_section->vma
11362 - elf_gp (htab->brlt->output_section->owner)
11363 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11364
11365 if (info->emitrelocations)
11366 {
11367 stub_entry->group->stub_sec->reloc_count
11368 += 1 + (PPC_HA (off) != 0);
11369 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11370 }
11371
11372 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
11373 {
11374 size = 12;
11375 if (PPC_HA (off) != 0)
11376 size = 16;
11377 }
11378 else
11379 {
11380 size = 16;
11381 if (PPC_HA (off) != 0)
11382 size += 4;
11383
11384 if (PPC_HA (r2off) != 0)
11385 size += 4;
11386 if (PPC_LO (r2off) != 0)
11387 size += 4;
11388 }
11389 }
11390 else if (info->emitrelocations)
11391 {
11392 stub_entry->group->stub_sec->reloc_count += 1;
11393 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11394 }
11395 }
11396
11397 stub_entry->group->stub_sec->size += size;
11398 return TRUE;
11399 }
11400
11401 /* Set up various things so that we can make a list of input sections
11402 for each output section included in the link. Returns -1 on error,
11403 0 when no stubs will be needed, and 1 on success. */
11404
11405 int
11406 ppc64_elf_setup_section_lists (struct bfd_link_info *info)
11407 {
11408 unsigned int id;
11409 bfd_size_type amt;
11410 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11411
11412 if (htab == NULL)
11413 return -1;
11414
11415 htab->sec_info_arr_size = bfd_get_next_section_id ();
11416 amt = sizeof (*htab->sec_info) * (htab->sec_info_arr_size);
11417 htab->sec_info = bfd_zmalloc (amt);
11418 if (htab->sec_info == NULL)
11419 return -1;
11420
11421 /* Set toc_off for com, und, abs and ind sections. */
11422 for (id = 0; id < 3; id++)
11423 htab->sec_info[id].toc_off = TOC_BASE_OFF;
11424
11425 return 1;
11426 }
11427
11428 /* Set up for first pass at multitoc partitioning. */
11429
11430 void
11431 ppc64_elf_start_multitoc_partition (struct bfd_link_info *info)
11432 {
11433 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11434
11435 htab->toc_curr = ppc64_elf_set_toc (info, info->output_bfd);
11436 htab->toc_bfd = NULL;
11437 htab->toc_first_sec = NULL;
11438 }
11439
11440 /* The linker repeatedly calls this function for each TOC input section
11441 and linker generated GOT section. Group input bfds such that the toc
11442 within a group is less than 64k in size. */
11443
11444 bfd_boolean
11445 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
11446 {
11447 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11448 bfd_vma addr, off, limit;
11449
11450 if (htab == NULL)
11451 return FALSE;
11452
11453 if (!htab->second_toc_pass)
11454 {
11455 /* Keep track of the first .toc or .got section for this input bfd. */
11456 bfd_boolean new_bfd = htab->toc_bfd != isec->owner;
11457
11458 if (new_bfd)
11459 {
11460 htab->toc_bfd = isec->owner;
11461 htab->toc_first_sec = isec;
11462 }
11463
11464 addr = isec->output_offset + isec->output_section->vma;
11465 off = addr - htab->toc_curr;
11466 limit = 0x80008000;
11467 if (ppc64_elf_tdata (isec->owner)->has_small_toc_reloc)
11468 limit = 0x10000;
11469 if (off + isec->size > limit)
11470 {
11471 addr = (htab->toc_first_sec->output_offset
11472 + htab->toc_first_sec->output_section->vma);
11473 htab->toc_curr = addr;
11474 htab->toc_curr &= -TOC_BASE_ALIGN;
11475 }
11476
11477 /* toc_curr is the base address of this toc group. Set elf_gp
11478 for the input section to be the offset relative to the
11479 output toc base plus 0x8000. Making the input elf_gp an
11480 offset allows us to move the toc as a whole without
11481 recalculating input elf_gp. */
11482 off = htab->toc_curr - elf_gp (isec->output_section->owner);
11483 off += TOC_BASE_OFF;
11484
11485 /* Die if someone uses a linker script that doesn't keep input
11486 file .toc and .got together. */
11487 if (new_bfd
11488 && elf_gp (isec->owner) != 0
11489 && elf_gp (isec->owner) != off)
11490 return FALSE;
11491
11492 elf_gp (isec->owner) = off;
11493 return TRUE;
11494 }
11495
11496 /* During the second pass toc_first_sec points to the start of
11497 a toc group, and toc_curr is used to track the old elf_gp.
11498 We use toc_bfd to ensure we only look at each bfd once. */
11499 if (htab->toc_bfd == isec->owner)
11500 return TRUE;
11501 htab->toc_bfd = isec->owner;
11502
11503 if (htab->toc_first_sec == NULL
11504 || htab->toc_curr != elf_gp (isec->owner))
11505 {
11506 htab->toc_curr = elf_gp (isec->owner);
11507 htab->toc_first_sec = isec;
11508 }
11509 addr = (htab->toc_first_sec->output_offset
11510 + htab->toc_first_sec->output_section->vma);
11511 off = addr - elf_gp (isec->output_section->owner) + TOC_BASE_OFF;
11512 elf_gp (isec->owner) = off;
11513
11514 return TRUE;
11515 }
11516
11517 /* Called via elf_link_hash_traverse to merge GOT entries for global
11518 symbol H. */
11519
11520 static bfd_boolean
11521 merge_global_got (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
11522 {
11523 if (h->root.type == bfd_link_hash_indirect)
11524 return TRUE;
11525
11526 merge_got_entries (&h->got.glist);
11527
11528 return TRUE;
11529 }
11530
11531 /* Called via elf_link_hash_traverse to allocate GOT entries for global
11532 symbol H. */
11533
11534 static bfd_boolean
11535 reallocate_got (struct elf_link_hash_entry *h, void *inf)
11536 {
11537 struct got_entry *gent;
11538
11539 if (h->root.type == bfd_link_hash_indirect)
11540 return TRUE;
11541
11542 for (gent = h->got.glist; gent != NULL; gent = gent->next)
11543 if (!gent->is_indirect)
11544 allocate_got (h, (struct bfd_link_info *) inf, gent);
11545 return TRUE;
11546 }
11547
11548 /* Called on the first multitoc pass after the last call to
11549 ppc64_elf_next_toc_section. This function removes duplicate GOT
11550 entries. */
11551
11552 bfd_boolean
11553 ppc64_elf_layout_multitoc (struct bfd_link_info *info)
11554 {
11555 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11556 struct bfd *ibfd, *ibfd2;
11557 bfd_boolean done_something;
11558
11559 htab->multi_toc_needed = htab->toc_curr != elf_gp (info->output_bfd);
11560
11561 if (!htab->do_multi_toc)
11562 return FALSE;
11563
11564 /* Merge global sym got entries within a toc group. */
11565 elf_link_hash_traverse (&htab->elf, merge_global_got, info);
11566
11567 /* And tlsld_got. */
11568 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11569 {
11570 struct got_entry *ent, *ent2;
11571
11572 if (!is_ppc64_elf (ibfd))
11573 continue;
11574
11575 ent = ppc64_tlsld_got (ibfd);
11576 if (!ent->is_indirect
11577 && ent->got.offset != (bfd_vma) -1)
11578 {
11579 for (ibfd2 = ibfd->link.next; ibfd2 != NULL; ibfd2 = ibfd2->link.next)
11580 {
11581 if (!is_ppc64_elf (ibfd2))
11582 continue;
11583
11584 ent2 = ppc64_tlsld_got (ibfd2);
11585 if (!ent2->is_indirect
11586 && ent2->got.offset != (bfd_vma) -1
11587 && elf_gp (ibfd2) == elf_gp (ibfd))
11588 {
11589 ent2->is_indirect = TRUE;
11590 ent2->got.ent = ent;
11591 }
11592 }
11593 }
11594 }
11595
11596 /* Zap sizes of got sections. */
11597 htab->elf.irelplt->rawsize = htab->elf.irelplt->size;
11598 htab->elf.irelplt->size -= htab->got_reli_size;
11599 htab->got_reli_size = 0;
11600
11601 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11602 {
11603 asection *got, *relgot;
11604
11605 if (!is_ppc64_elf (ibfd))
11606 continue;
11607
11608 got = ppc64_elf_tdata (ibfd)->got;
11609 if (got != NULL)
11610 {
11611 got->rawsize = got->size;
11612 got->size = 0;
11613 relgot = ppc64_elf_tdata (ibfd)->relgot;
11614 relgot->rawsize = relgot->size;
11615 relgot->size = 0;
11616 }
11617 }
11618
11619 /* Now reallocate the got, local syms first. We don't need to
11620 allocate section contents again since we never increase size. */
11621 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11622 {
11623 struct got_entry **lgot_ents;
11624 struct got_entry **end_lgot_ents;
11625 struct plt_entry **local_plt;
11626 struct plt_entry **end_local_plt;
11627 unsigned char *lgot_masks;
11628 bfd_size_type locsymcount;
11629 Elf_Internal_Shdr *symtab_hdr;
11630 asection *s;
11631
11632 if (!is_ppc64_elf (ibfd))
11633 continue;
11634
11635 lgot_ents = elf_local_got_ents (ibfd);
11636 if (!lgot_ents)
11637 continue;
11638
11639 symtab_hdr = &elf_symtab_hdr (ibfd);
11640 locsymcount = symtab_hdr->sh_info;
11641 end_lgot_ents = lgot_ents + locsymcount;
11642 local_plt = (struct plt_entry **) end_lgot_ents;
11643 end_local_plt = local_plt + locsymcount;
11644 lgot_masks = (unsigned char *) end_local_plt;
11645 s = ppc64_elf_tdata (ibfd)->got;
11646 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
11647 {
11648 struct got_entry *ent;
11649
11650 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
11651 {
11652 unsigned int ent_size = 8;
11653 unsigned int rel_size = sizeof (Elf64_External_Rela);
11654
11655 ent->got.offset = s->size;
11656 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
11657 {
11658 ent_size *= 2;
11659 rel_size *= 2;
11660 }
11661 s->size += ent_size;
11662 if ((*lgot_masks & PLT_IFUNC) != 0)
11663 {
11664 htab->elf.irelplt->size += rel_size;
11665 htab->got_reli_size += rel_size;
11666 }
11667 else if (bfd_link_pic (info))
11668 {
11669 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
11670 srel->size += rel_size;
11671 }
11672 }
11673 }
11674 }
11675
11676 elf_link_hash_traverse (&htab->elf, reallocate_got, info);
11677
11678 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11679 {
11680 struct got_entry *ent;
11681
11682 if (!is_ppc64_elf (ibfd))
11683 continue;
11684
11685 ent = ppc64_tlsld_got (ibfd);
11686 if (!ent->is_indirect
11687 && ent->got.offset != (bfd_vma) -1)
11688 {
11689 asection *s = ppc64_elf_tdata (ibfd)->got;
11690 ent->got.offset = s->size;
11691 s->size += 16;
11692 if (bfd_link_pic (info))
11693 {
11694 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
11695 srel->size += sizeof (Elf64_External_Rela);
11696 }
11697 }
11698 }
11699
11700 done_something = htab->elf.irelplt->rawsize != htab->elf.irelplt->size;
11701 if (!done_something)
11702 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11703 {
11704 asection *got;
11705
11706 if (!is_ppc64_elf (ibfd))
11707 continue;
11708
11709 got = ppc64_elf_tdata (ibfd)->got;
11710 if (got != NULL)
11711 {
11712 done_something = got->rawsize != got->size;
11713 if (done_something)
11714 break;
11715 }
11716 }
11717
11718 if (done_something)
11719 (*htab->params->layout_sections_again) ();
11720
11721 /* Set up for second pass over toc sections to recalculate elf_gp
11722 on input sections. */
11723 htab->toc_bfd = NULL;
11724 htab->toc_first_sec = NULL;
11725 htab->second_toc_pass = TRUE;
11726 return done_something;
11727 }
11728
11729 /* Called after second pass of multitoc partitioning. */
11730
11731 void
11732 ppc64_elf_finish_multitoc_partition (struct bfd_link_info *info)
11733 {
11734 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11735
11736 /* After the second pass, toc_curr tracks the TOC offset used
11737 for code sections below in ppc64_elf_next_input_section. */
11738 htab->toc_curr = TOC_BASE_OFF;
11739 }
11740
11741 /* No toc references were found in ISEC. If the code in ISEC makes no
11742 calls, then there's no need to use toc adjusting stubs when branching
11743 into ISEC. Actually, indirect calls from ISEC are OK as they will
11744 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
11745 needed, and 2 if a cyclical call-graph was found but no other reason
11746 for a stub was detected. If called from the top level, a return of
11747 2 means the same as a return of 0. */
11748
11749 static int
11750 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
11751 {
11752 int ret;
11753
11754 /* Mark this section as checked. */
11755 isec->call_check_done = 1;
11756
11757 /* We know none of our code bearing sections will need toc stubs. */
11758 if ((isec->flags & SEC_LINKER_CREATED) != 0)
11759 return 0;
11760
11761 if (isec->size == 0)
11762 return 0;
11763
11764 if (isec->output_section == NULL)
11765 return 0;
11766
11767 ret = 0;
11768 if (isec->reloc_count != 0)
11769 {
11770 Elf_Internal_Rela *relstart, *rel;
11771 Elf_Internal_Sym *local_syms;
11772 struct ppc_link_hash_table *htab;
11773
11774 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
11775 info->keep_memory);
11776 if (relstart == NULL)
11777 return -1;
11778
11779 /* Look for branches to outside of this section. */
11780 local_syms = NULL;
11781 htab = ppc_hash_table (info);
11782 if (htab == NULL)
11783 return -1;
11784
11785 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
11786 {
11787 enum elf_ppc64_reloc_type r_type;
11788 unsigned long r_symndx;
11789 struct elf_link_hash_entry *h;
11790 struct ppc_link_hash_entry *eh;
11791 Elf_Internal_Sym *sym;
11792 asection *sym_sec;
11793 struct _opd_sec_data *opd;
11794 bfd_vma sym_value;
11795 bfd_vma dest;
11796
11797 r_type = ELF64_R_TYPE (rel->r_info);
11798 if (r_type != R_PPC64_REL24
11799 && r_type != R_PPC64_REL14
11800 && r_type != R_PPC64_REL14_BRTAKEN
11801 && r_type != R_PPC64_REL14_BRNTAKEN)
11802 continue;
11803
11804 r_symndx = ELF64_R_SYM (rel->r_info);
11805 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
11806 isec->owner))
11807 {
11808 ret = -1;
11809 break;
11810 }
11811
11812 /* Calls to dynamic lib functions go through a plt call stub
11813 that uses r2. */
11814 eh = (struct ppc_link_hash_entry *) h;
11815 if (eh != NULL
11816 && (eh->elf.plt.plist != NULL
11817 || (eh->oh != NULL
11818 && ppc_follow_link (eh->oh)->elf.plt.plist != NULL)))
11819 {
11820 ret = 1;
11821 break;
11822 }
11823
11824 if (sym_sec == NULL)
11825 /* Ignore other undefined symbols. */
11826 continue;
11827
11828 /* Assume branches to other sections not included in the
11829 link need stubs too, to cover -R and absolute syms. */
11830 if (sym_sec->output_section == NULL)
11831 {
11832 ret = 1;
11833 break;
11834 }
11835
11836 if (h == NULL)
11837 sym_value = sym->st_value;
11838 else
11839 {
11840 if (h->root.type != bfd_link_hash_defined
11841 && h->root.type != bfd_link_hash_defweak)
11842 abort ();
11843 sym_value = h->root.u.def.value;
11844 }
11845 sym_value += rel->r_addend;
11846
11847 /* If this branch reloc uses an opd sym, find the code section. */
11848 opd = get_opd_info (sym_sec);
11849 if (opd != NULL)
11850 {
11851 if (h == NULL && opd->adjust != NULL)
11852 {
11853 long adjust;
11854
11855 adjust = opd->adjust[OPD_NDX (sym_value)];
11856 if (adjust == -1)
11857 /* Assume deleted functions won't ever be called. */
11858 continue;
11859 sym_value += adjust;
11860 }
11861
11862 dest = opd_entry_value (sym_sec, sym_value,
11863 &sym_sec, NULL, FALSE);
11864 if (dest == (bfd_vma) -1)
11865 continue;
11866 }
11867 else
11868 dest = (sym_value
11869 + sym_sec->output_offset
11870 + sym_sec->output_section->vma);
11871
11872 /* Ignore branch to self. */
11873 if (sym_sec == isec)
11874 continue;
11875
11876 /* If the called function uses the toc, we need a stub. */
11877 if (sym_sec->has_toc_reloc
11878 || sym_sec->makes_toc_func_call)
11879 {
11880 ret = 1;
11881 break;
11882 }
11883
11884 /* Assume any branch that needs a long branch stub might in fact
11885 need a plt_branch stub. A plt_branch stub uses r2. */
11886 else if (dest - (isec->output_offset
11887 + isec->output_section->vma
11888 + rel->r_offset) + (1 << 25)
11889 >= (2u << 25) - PPC64_LOCAL_ENTRY_OFFSET (h
11890 ? h->other
11891 : sym->st_other))
11892 {
11893 ret = 1;
11894 break;
11895 }
11896
11897 /* If calling back to a section in the process of being
11898 tested, we can't say for sure that no toc adjusting stubs
11899 are needed, so don't return zero. */
11900 else if (sym_sec->call_check_in_progress)
11901 ret = 2;
11902
11903 /* Branches to another section that itself doesn't have any TOC
11904 references are OK. Recursively call ourselves to check. */
11905 else if (!sym_sec->call_check_done)
11906 {
11907 int recur;
11908
11909 /* Mark current section as indeterminate, so that other
11910 sections that call back to current won't be marked as
11911 known. */
11912 isec->call_check_in_progress = 1;
11913 recur = toc_adjusting_stub_needed (info, sym_sec);
11914 isec->call_check_in_progress = 0;
11915
11916 if (recur != 0)
11917 {
11918 ret = recur;
11919 if (recur != 2)
11920 break;
11921 }
11922 }
11923 }
11924
11925 if (local_syms != NULL
11926 && (elf_symtab_hdr (isec->owner).contents
11927 != (unsigned char *) local_syms))
11928 free (local_syms);
11929 if (elf_section_data (isec)->relocs != relstart)
11930 free (relstart);
11931 }
11932
11933 if ((ret & 1) == 0
11934 && isec->map_head.s != NULL
11935 && (strcmp (isec->output_section->name, ".init") == 0
11936 || strcmp (isec->output_section->name, ".fini") == 0))
11937 {
11938 if (isec->map_head.s->has_toc_reloc
11939 || isec->map_head.s->makes_toc_func_call)
11940 ret = 1;
11941 else if (!isec->map_head.s->call_check_done)
11942 {
11943 int recur;
11944 isec->call_check_in_progress = 1;
11945 recur = toc_adjusting_stub_needed (info, isec->map_head.s);
11946 isec->call_check_in_progress = 0;
11947 if (recur != 0)
11948 ret = recur;
11949 }
11950 }
11951
11952 if (ret == 1)
11953 isec->makes_toc_func_call = 1;
11954
11955 return ret;
11956 }
11957
11958 /* The linker repeatedly calls this function for each input section,
11959 in the order that input sections are linked into output sections.
11960 Build lists of input sections to determine groupings between which
11961 we may insert linker stubs. */
11962
11963 bfd_boolean
11964 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
11965 {
11966 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11967
11968 if (htab == NULL)
11969 return FALSE;
11970
11971 if ((isec->output_section->flags & SEC_CODE) != 0
11972 && isec->output_section->id < htab->sec_info_arr_size)
11973 {
11974 /* This happens to make the list in reverse order,
11975 which is what we want. */
11976 htab->sec_info[isec->id].u.list
11977 = htab->sec_info[isec->output_section->id].u.list;
11978 htab->sec_info[isec->output_section->id].u.list = isec;
11979 }
11980
11981 if (htab->multi_toc_needed)
11982 {
11983 /* Analyse sections that aren't already flagged as needing a
11984 valid toc pointer. Exclude .fixup for the linux kernel.
11985 .fixup contains branches, but only back to the function that
11986 hit an exception. */
11987 if (!(isec->has_toc_reloc
11988 || (isec->flags & SEC_CODE) == 0
11989 || strcmp (isec->name, ".fixup") == 0
11990 || isec->call_check_done))
11991 {
11992 if (toc_adjusting_stub_needed (info, isec) < 0)
11993 return FALSE;
11994 }
11995 /* Make all sections use the TOC assigned for this object file.
11996 This will be wrong for pasted sections; We fix that in
11997 check_pasted_section(). */
11998 if (elf_gp (isec->owner) != 0)
11999 htab->toc_curr = elf_gp (isec->owner);
12000 }
12001
12002 htab->sec_info[isec->id].toc_off = htab->toc_curr;
12003 return TRUE;
12004 }
12005
12006 /* Check that all .init and .fini sections use the same toc, if they
12007 have toc relocs. */
12008
12009 static bfd_boolean
12010 check_pasted_section (struct bfd_link_info *info, const char *name)
12011 {
12012 asection *o = bfd_get_section_by_name (info->output_bfd, name);
12013
12014 if (o != NULL)
12015 {
12016 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12017 bfd_vma toc_off = 0;
12018 asection *i;
12019
12020 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
12021 if (i->has_toc_reloc)
12022 {
12023 if (toc_off == 0)
12024 toc_off = htab->sec_info[i->id].toc_off;
12025 else if (toc_off != htab->sec_info[i->id].toc_off)
12026 return FALSE;
12027 }
12028
12029 if (toc_off == 0)
12030 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
12031 if (i->makes_toc_func_call)
12032 {
12033 toc_off = htab->sec_info[i->id].toc_off;
12034 break;
12035 }
12036
12037 /* Make sure the whole pasted function uses the same toc offset. */
12038 if (toc_off != 0)
12039 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
12040 htab->sec_info[i->id].toc_off = toc_off;
12041 }
12042 return TRUE;
12043 }
12044
12045 bfd_boolean
12046 ppc64_elf_check_init_fini (struct bfd_link_info *info)
12047 {
12048 return (check_pasted_section (info, ".init")
12049 & check_pasted_section (info, ".fini"));
12050 }
12051
12052 /* See whether we can group stub sections together. Grouping stub
12053 sections may result in fewer stubs. More importantly, we need to
12054 put all .init* and .fini* stubs at the beginning of the .init or
12055 .fini output sections respectively, because glibc splits the
12056 _init and _fini functions into multiple parts. Putting a stub in
12057 the middle of a function is not a good idea. */
12058
12059 static bfd_boolean
12060 group_sections (struct bfd_link_info *info,
12061 bfd_size_type stub_group_size,
12062 bfd_boolean stubs_always_before_branch)
12063 {
12064 struct ppc_link_hash_table *htab;
12065 asection *osec;
12066 bfd_boolean suppress_size_errors;
12067
12068 htab = ppc_hash_table (info);
12069 if (htab == NULL)
12070 return FALSE;
12071
12072 suppress_size_errors = FALSE;
12073 if (stub_group_size == 1)
12074 {
12075 /* Default values. */
12076 if (stubs_always_before_branch)
12077 stub_group_size = 0x1e00000;
12078 else
12079 stub_group_size = 0x1c00000;
12080 suppress_size_errors = TRUE;
12081 }
12082
12083 for (osec = info->output_bfd->sections; osec != NULL; osec = osec->next)
12084 {
12085 asection *tail;
12086
12087 if (osec->id >= htab->sec_info_arr_size)
12088 continue;
12089
12090 tail = htab->sec_info[osec->id].u.list;
12091 while (tail != NULL)
12092 {
12093 asection *curr;
12094 asection *prev;
12095 bfd_size_type total;
12096 bfd_boolean big_sec;
12097 bfd_vma curr_toc;
12098 struct map_stub *group;
12099 bfd_size_type group_size;
12100
12101 curr = tail;
12102 total = tail->size;
12103 group_size = (ppc64_elf_section_data (tail) != NULL
12104 && ppc64_elf_section_data (tail)->has_14bit_branch
12105 ? stub_group_size >> 10 : stub_group_size);
12106
12107 big_sec = total > group_size;
12108 if (big_sec && !suppress_size_errors)
12109 _bfd_error_handler (_("%B section %A exceeds stub group size"),
12110 tail->owner, tail);
12111 curr_toc = htab->sec_info[tail->id].toc_off;
12112
12113 while ((prev = htab->sec_info[curr->id].u.list) != NULL
12114 && ((total += curr->output_offset - prev->output_offset)
12115 < (ppc64_elf_section_data (prev) != NULL
12116 && ppc64_elf_section_data (prev)->has_14bit_branch
12117 ? (group_size = stub_group_size >> 10) : group_size))
12118 && htab->sec_info[prev->id].toc_off == curr_toc)
12119 curr = prev;
12120
12121 /* OK, the size from the start of CURR to the end is less
12122 than group_size and thus can be handled by one stub
12123 section. (or the tail section is itself larger than
12124 group_size, in which case we may be toast.) We should
12125 really be keeping track of the total size of stubs added
12126 here, as stubs contribute to the final output section
12127 size. That's a little tricky, and this way will only
12128 break if stubs added make the total size more than 2^25,
12129 ie. for the default stub_group_size, if stubs total more
12130 than 2097152 bytes, or nearly 75000 plt call stubs. */
12131 group = bfd_alloc (curr->owner, sizeof (*group));
12132 if (group == NULL)
12133 return FALSE;
12134 group->link_sec = curr;
12135 group->stub_sec = NULL;
12136 group->needs_save_res = 0;
12137 group->next = htab->group;
12138 htab->group = group;
12139 do
12140 {
12141 prev = htab->sec_info[tail->id].u.list;
12142 /* Set up this stub group. */
12143 htab->sec_info[tail->id].u.group = group;
12144 }
12145 while (tail != curr && (tail = prev) != NULL);
12146
12147 /* But wait, there's more! Input sections up to group_size
12148 bytes before the stub section can be handled by it too.
12149 Don't do this if we have a really large section after the
12150 stubs, as adding more stubs increases the chance that
12151 branches may not reach into the stub section. */
12152 if (!stubs_always_before_branch && !big_sec)
12153 {
12154 total = 0;
12155 while (prev != NULL
12156 && ((total += tail->output_offset - prev->output_offset)
12157 < (ppc64_elf_section_data (prev) != NULL
12158 && ppc64_elf_section_data (prev)->has_14bit_branch
12159 ? (group_size = stub_group_size >> 10) : group_size))
12160 && htab->sec_info[prev->id].toc_off == curr_toc)
12161 {
12162 tail = prev;
12163 prev = htab->sec_info[tail->id].u.list;
12164 htab->sec_info[tail->id].u.group = group;
12165 }
12166 }
12167 tail = prev;
12168 }
12169 }
12170 return TRUE;
12171 }
12172
12173 static const unsigned char glink_eh_frame_cie[] =
12174 {
12175 0, 0, 0, 16, /* length. */
12176 0, 0, 0, 0, /* id. */
12177 1, /* CIE version. */
12178 'z', 'R', 0, /* Augmentation string. */
12179 4, /* Code alignment. */
12180 0x78, /* Data alignment. */
12181 65, /* RA reg. */
12182 1, /* Augmentation size. */
12183 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
12184 DW_CFA_def_cfa, 1, 0, /* def_cfa: r1 offset 0. */
12185 0, 0, 0, 0
12186 };
12187
12188 /* Stripping output sections is normally done before dynamic section
12189 symbols have been allocated. This function is called later, and
12190 handles cases like htab->brlt which is mapped to its own output
12191 section. */
12192
12193 static void
12194 maybe_strip_output (struct bfd_link_info *info, asection *isec)
12195 {
12196 if (isec->size == 0
12197 && isec->output_section->size == 0
12198 && !(isec->output_section->flags & SEC_KEEP)
12199 && !bfd_section_removed_from_list (info->output_bfd,
12200 isec->output_section)
12201 && elf_section_data (isec->output_section)->dynindx == 0)
12202 {
12203 isec->output_section->flags |= SEC_EXCLUDE;
12204 bfd_section_list_remove (info->output_bfd, isec->output_section);
12205 info->output_bfd->section_count--;
12206 }
12207 }
12208
12209 /* Determine and set the size of the stub section for a final link.
12210
12211 The basic idea here is to examine all the relocations looking for
12212 PC-relative calls to a target that is unreachable with a "bl"
12213 instruction. */
12214
12215 bfd_boolean
12216 ppc64_elf_size_stubs (struct bfd_link_info *info)
12217 {
12218 bfd_size_type stub_group_size;
12219 bfd_boolean stubs_always_before_branch;
12220 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12221
12222 if (htab == NULL)
12223 return FALSE;
12224
12225 if (htab->params->plt_thread_safe == -1 && !bfd_link_executable (info))
12226 htab->params->plt_thread_safe = 1;
12227 if (!htab->opd_abi)
12228 htab->params->plt_thread_safe = 0;
12229 else if (htab->params->plt_thread_safe == -1)
12230 {
12231 static const char *const thread_starter[] =
12232 {
12233 "pthread_create",
12234 /* libstdc++ */
12235 "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE",
12236 /* librt */
12237 "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio",
12238 "mq_notify", "create_timer",
12239 /* libanl */
12240 "getaddrinfo_a",
12241 /* libgomp */
12242 "GOMP_parallel",
12243 "GOMP_parallel_start",
12244 "GOMP_parallel_loop_static",
12245 "GOMP_parallel_loop_static_start",
12246 "GOMP_parallel_loop_dynamic",
12247 "GOMP_parallel_loop_dynamic_start",
12248 "GOMP_parallel_loop_guided",
12249 "GOMP_parallel_loop_guided_start",
12250 "GOMP_parallel_loop_runtime",
12251 "GOMP_parallel_loop_runtime_start",
12252 "GOMP_parallel_sections",
12253 "GOMP_parallel_sections_start",
12254 /* libgo */
12255 "__go_go",
12256 };
12257 unsigned i;
12258
12259 for (i = 0; i < ARRAY_SIZE (thread_starter); i++)
12260 {
12261 struct elf_link_hash_entry *h;
12262 h = elf_link_hash_lookup (&htab->elf, thread_starter[i],
12263 FALSE, FALSE, TRUE);
12264 htab->params->plt_thread_safe = h != NULL && h->ref_regular;
12265 if (htab->params->plt_thread_safe)
12266 break;
12267 }
12268 }
12269 stubs_always_before_branch = htab->params->group_size < 0;
12270 if (htab->params->group_size < 0)
12271 stub_group_size = -htab->params->group_size;
12272 else
12273 stub_group_size = htab->params->group_size;
12274
12275 if (!group_sections (info, stub_group_size, stubs_always_before_branch))
12276 return FALSE;
12277
12278 #define STUB_SHRINK_ITER 20
12279 /* Loop until no stubs added. After iteration 20 of this loop we may
12280 exit on a stub section shrinking. This is to break out of a
12281 pathological case where adding stubs on one iteration decreases
12282 section gaps (perhaps due to alignment), which then requires
12283 fewer or smaller stubs on the next iteration. */
12284
12285 while (1)
12286 {
12287 bfd *input_bfd;
12288 unsigned int bfd_indx;
12289 struct map_stub *group;
12290 asection *stub_sec;
12291
12292 htab->stub_iteration += 1;
12293
12294 for (input_bfd = info->input_bfds, bfd_indx = 0;
12295 input_bfd != NULL;
12296 input_bfd = input_bfd->link.next, bfd_indx++)
12297 {
12298 Elf_Internal_Shdr *symtab_hdr;
12299 asection *section;
12300 Elf_Internal_Sym *local_syms = NULL;
12301
12302 if (!is_ppc64_elf (input_bfd))
12303 continue;
12304
12305 /* We'll need the symbol table in a second. */
12306 symtab_hdr = &elf_symtab_hdr (input_bfd);
12307 if (symtab_hdr->sh_info == 0)
12308 continue;
12309
12310 /* Walk over each section attached to the input bfd. */
12311 for (section = input_bfd->sections;
12312 section != NULL;
12313 section = section->next)
12314 {
12315 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
12316
12317 /* If there aren't any relocs, then there's nothing more
12318 to do. */
12319 if ((section->flags & SEC_RELOC) == 0
12320 || (section->flags & SEC_ALLOC) == 0
12321 || (section->flags & SEC_LOAD) == 0
12322 || (section->flags & SEC_CODE) == 0
12323 || section->reloc_count == 0)
12324 continue;
12325
12326 /* If this section is a link-once section that will be
12327 discarded, then don't create any stubs. */
12328 if (section->output_section == NULL
12329 || section->output_section->owner != info->output_bfd)
12330 continue;
12331
12332 /* Get the relocs. */
12333 internal_relocs
12334 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
12335 info->keep_memory);
12336 if (internal_relocs == NULL)
12337 goto error_ret_free_local;
12338
12339 /* Now examine each relocation. */
12340 irela = internal_relocs;
12341 irelaend = irela + section->reloc_count;
12342 for (; irela < irelaend; irela++)
12343 {
12344 enum elf_ppc64_reloc_type r_type;
12345 unsigned int r_indx;
12346 enum ppc_stub_type stub_type;
12347 struct ppc_stub_hash_entry *stub_entry;
12348 asection *sym_sec, *code_sec;
12349 bfd_vma sym_value, code_value;
12350 bfd_vma destination;
12351 unsigned long local_off;
12352 bfd_boolean ok_dest;
12353 struct ppc_link_hash_entry *hash;
12354 struct ppc_link_hash_entry *fdh;
12355 struct elf_link_hash_entry *h;
12356 Elf_Internal_Sym *sym;
12357 char *stub_name;
12358 const asection *id_sec;
12359 struct _opd_sec_data *opd;
12360 struct plt_entry *plt_ent;
12361
12362 r_type = ELF64_R_TYPE (irela->r_info);
12363 r_indx = ELF64_R_SYM (irela->r_info);
12364
12365 if (r_type >= R_PPC64_max)
12366 {
12367 bfd_set_error (bfd_error_bad_value);
12368 goto error_ret_free_internal;
12369 }
12370
12371 /* Only look for stubs on branch instructions. */
12372 if (r_type != R_PPC64_REL24
12373 && r_type != R_PPC64_REL14
12374 && r_type != R_PPC64_REL14_BRTAKEN
12375 && r_type != R_PPC64_REL14_BRNTAKEN)
12376 continue;
12377
12378 /* Now determine the call target, its name, value,
12379 section. */
12380 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
12381 r_indx, input_bfd))
12382 goto error_ret_free_internal;
12383 hash = (struct ppc_link_hash_entry *) h;
12384
12385 ok_dest = FALSE;
12386 fdh = NULL;
12387 sym_value = 0;
12388 if (hash == NULL)
12389 {
12390 sym_value = sym->st_value;
12391 if (sym_sec != NULL
12392 && sym_sec->output_section != NULL)
12393 ok_dest = TRUE;
12394 }
12395 else if (hash->elf.root.type == bfd_link_hash_defined
12396 || hash->elf.root.type == bfd_link_hash_defweak)
12397 {
12398 sym_value = hash->elf.root.u.def.value;
12399 if (sym_sec->output_section != NULL)
12400 ok_dest = TRUE;
12401 }
12402 else if (hash->elf.root.type == bfd_link_hash_undefweak
12403 || hash->elf.root.type == bfd_link_hash_undefined)
12404 {
12405 /* Recognise an old ABI func code entry sym, and
12406 use the func descriptor sym instead if it is
12407 defined. */
12408 if (hash->elf.root.root.string[0] == '.'
12409 && (fdh = lookup_fdh (hash, htab)) != NULL)
12410 {
12411 if (fdh->elf.root.type == bfd_link_hash_defined
12412 || fdh->elf.root.type == bfd_link_hash_defweak)
12413 {
12414 sym_sec = fdh->elf.root.u.def.section;
12415 sym_value = fdh->elf.root.u.def.value;
12416 if (sym_sec->output_section != NULL)
12417 ok_dest = TRUE;
12418 }
12419 else
12420 fdh = NULL;
12421 }
12422 }
12423 else
12424 {
12425 bfd_set_error (bfd_error_bad_value);
12426 goto error_ret_free_internal;
12427 }
12428
12429 destination = 0;
12430 local_off = 0;
12431 if (ok_dest)
12432 {
12433 sym_value += irela->r_addend;
12434 destination = (sym_value
12435 + sym_sec->output_offset
12436 + sym_sec->output_section->vma);
12437 local_off = PPC64_LOCAL_ENTRY_OFFSET (hash
12438 ? hash->elf.other
12439 : sym->st_other);
12440 }
12441
12442 code_sec = sym_sec;
12443 code_value = sym_value;
12444 opd = get_opd_info (sym_sec);
12445 if (opd != NULL)
12446 {
12447 bfd_vma dest;
12448
12449 if (hash == NULL && opd->adjust != NULL)
12450 {
12451 long adjust = opd->adjust[OPD_NDX (sym_value)];
12452 if (adjust == -1)
12453 continue;
12454 code_value += adjust;
12455 sym_value += adjust;
12456 }
12457 dest = opd_entry_value (sym_sec, sym_value,
12458 &code_sec, &code_value, FALSE);
12459 if (dest != (bfd_vma) -1)
12460 {
12461 destination = dest;
12462 if (fdh != NULL)
12463 {
12464 /* Fixup old ABI sym to point at code
12465 entry. */
12466 hash->elf.root.type = bfd_link_hash_defweak;
12467 hash->elf.root.u.def.section = code_sec;
12468 hash->elf.root.u.def.value = code_value;
12469 }
12470 }
12471 }
12472
12473 /* Determine what (if any) linker stub is needed. */
12474 plt_ent = NULL;
12475 stub_type = ppc_type_of_stub (section, irela, &hash,
12476 &plt_ent, destination,
12477 local_off);
12478
12479 if (stub_type != ppc_stub_plt_call)
12480 {
12481 /* Check whether we need a TOC adjusting stub.
12482 Since the linker pastes together pieces from
12483 different object files when creating the
12484 _init and _fini functions, it may be that a
12485 call to what looks like a local sym is in
12486 fact a call needing a TOC adjustment. */
12487 if (code_sec != NULL
12488 && code_sec->output_section != NULL
12489 && (htab->sec_info[code_sec->id].toc_off
12490 != htab->sec_info[section->id].toc_off)
12491 && (code_sec->has_toc_reloc
12492 || code_sec->makes_toc_func_call))
12493 stub_type = ppc_stub_long_branch_r2off;
12494 }
12495
12496 if (stub_type == ppc_stub_none)
12497 continue;
12498
12499 /* __tls_get_addr calls might be eliminated. */
12500 if (stub_type != ppc_stub_plt_call
12501 && hash != NULL
12502 && (hash == htab->tls_get_addr
12503 || hash == htab->tls_get_addr_fd)
12504 && section->has_tls_reloc
12505 && irela != internal_relocs)
12506 {
12507 /* Get tls info. */
12508 unsigned char *tls_mask;
12509
12510 if (!get_tls_mask (&tls_mask, NULL, NULL, &local_syms,
12511 irela - 1, input_bfd))
12512 goto error_ret_free_internal;
12513 if (*tls_mask != 0)
12514 continue;
12515 }
12516
12517 if (stub_type == ppc_stub_plt_call
12518 && irela + 1 < irelaend
12519 && irela[1].r_offset == irela->r_offset + 4
12520 && ELF64_R_TYPE (irela[1].r_info) == R_PPC64_TOCSAVE)
12521 {
12522 if (!tocsave_find (htab, INSERT,
12523 &local_syms, irela + 1, input_bfd))
12524 goto error_ret_free_internal;
12525 }
12526 else if (stub_type == ppc_stub_plt_call)
12527 stub_type = ppc_stub_plt_call_r2save;
12528
12529 /* Support for grouping stub sections. */
12530 id_sec = htab->sec_info[section->id].u.group->link_sec;
12531
12532 /* Get the name of this stub. */
12533 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
12534 if (!stub_name)
12535 goto error_ret_free_internal;
12536
12537 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
12538 stub_name, FALSE, FALSE);
12539 if (stub_entry != NULL)
12540 {
12541 /* The proper stub has already been created. */
12542 free (stub_name);
12543 if (stub_type == ppc_stub_plt_call_r2save)
12544 stub_entry->stub_type = stub_type;
12545 continue;
12546 }
12547
12548 stub_entry = ppc_add_stub (stub_name, section, info);
12549 if (stub_entry == NULL)
12550 {
12551 free (stub_name);
12552 error_ret_free_internal:
12553 if (elf_section_data (section)->relocs == NULL)
12554 free (internal_relocs);
12555 error_ret_free_local:
12556 if (local_syms != NULL
12557 && (symtab_hdr->contents
12558 != (unsigned char *) local_syms))
12559 free (local_syms);
12560 return FALSE;
12561 }
12562
12563 stub_entry->stub_type = stub_type;
12564 if (stub_type != ppc_stub_plt_call
12565 && stub_type != ppc_stub_plt_call_r2save)
12566 {
12567 stub_entry->target_value = code_value;
12568 stub_entry->target_section = code_sec;
12569 }
12570 else
12571 {
12572 stub_entry->target_value = sym_value;
12573 stub_entry->target_section = sym_sec;
12574 }
12575 stub_entry->h = hash;
12576 stub_entry->plt_ent = plt_ent;
12577 stub_entry->other = hash ? hash->elf.other : sym->st_other;
12578
12579 if (stub_entry->h != NULL)
12580 htab->stub_globals += 1;
12581 }
12582
12583 /* We're done with the internal relocs, free them. */
12584 if (elf_section_data (section)->relocs != internal_relocs)
12585 free (internal_relocs);
12586 }
12587
12588 if (local_syms != NULL
12589 && symtab_hdr->contents != (unsigned char *) local_syms)
12590 {
12591 if (!info->keep_memory)
12592 free (local_syms);
12593 else
12594 symtab_hdr->contents = (unsigned char *) local_syms;
12595 }
12596 }
12597
12598 /* We may have added some stubs. Find out the new size of the
12599 stub sections. */
12600 for (stub_sec = htab->params->stub_bfd->sections;
12601 stub_sec != NULL;
12602 stub_sec = stub_sec->next)
12603 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12604 {
12605 stub_sec->rawsize = stub_sec->size;
12606 stub_sec->size = 0;
12607 stub_sec->reloc_count = 0;
12608 stub_sec->flags &= ~SEC_RELOC;
12609 }
12610
12611 htab->brlt->size = 0;
12612 htab->brlt->reloc_count = 0;
12613 htab->brlt->flags &= ~SEC_RELOC;
12614 if (htab->relbrlt != NULL)
12615 htab->relbrlt->size = 0;
12616
12617 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
12618
12619 for (group = htab->group; group != NULL; group = group->next)
12620 if (group->needs_save_res)
12621 group->stub_sec->size += htab->sfpr->size;
12622
12623 if (info->emitrelocations
12624 && htab->glink != NULL && htab->glink->size != 0)
12625 {
12626 htab->glink->reloc_count = 1;
12627 htab->glink->flags |= SEC_RELOC;
12628 }
12629
12630 if (htab->glink_eh_frame != NULL
12631 && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
12632 && htab->glink_eh_frame->output_section->size != 0)
12633 {
12634 size_t size = 0, align;
12635
12636 for (stub_sec = htab->params->stub_bfd->sections;
12637 stub_sec != NULL;
12638 stub_sec = stub_sec->next)
12639 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12640 size += 24;
12641 if (htab->glink != NULL && htab->glink->size != 0)
12642 size += 24;
12643 if (size != 0)
12644 size += sizeof (glink_eh_frame_cie);
12645 align = 1;
12646 align <<= htab->glink_eh_frame->output_section->alignment_power;
12647 align -= 1;
12648 size = (size + align) & ~align;
12649 htab->glink_eh_frame->rawsize = htab->glink_eh_frame->size;
12650 htab->glink_eh_frame->size = size;
12651 }
12652
12653 if (htab->params->plt_stub_align != 0)
12654 for (stub_sec = htab->params->stub_bfd->sections;
12655 stub_sec != NULL;
12656 stub_sec = stub_sec->next)
12657 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12658 stub_sec->size = ((stub_sec->size
12659 + (1 << htab->params->plt_stub_align) - 1)
12660 & -(1 << htab->params->plt_stub_align));
12661
12662 for (stub_sec = htab->params->stub_bfd->sections;
12663 stub_sec != NULL;
12664 stub_sec = stub_sec->next)
12665 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
12666 && stub_sec->rawsize != stub_sec->size
12667 && (htab->stub_iteration <= STUB_SHRINK_ITER
12668 || stub_sec->rawsize < stub_sec->size))
12669 break;
12670
12671 if (stub_sec == NULL
12672 && (htab->glink_eh_frame == NULL
12673 || htab->glink_eh_frame->rawsize == htab->glink_eh_frame->size))
12674 break;
12675
12676 /* Ask the linker to do its stuff. */
12677 (*htab->params->layout_sections_again) ();
12678 }
12679
12680 if (htab->glink_eh_frame != NULL
12681 && htab->glink_eh_frame->size != 0)
12682 {
12683 bfd_vma val;
12684 bfd_byte *p, *last_fde;
12685 size_t last_fde_len, size, align, pad;
12686 asection *stub_sec;
12687
12688 p = bfd_zalloc (htab->glink_eh_frame->owner, htab->glink_eh_frame->size);
12689 if (p == NULL)
12690 return FALSE;
12691 htab->glink_eh_frame->contents = p;
12692 last_fde = p;
12693
12694 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
12695 /* CIE length (rewrite in case little-endian). */
12696 last_fde_len = sizeof (glink_eh_frame_cie) - 4;
12697 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
12698 p += sizeof (glink_eh_frame_cie);
12699
12700 for (stub_sec = htab->params->stub_bfd->sections;
12701 stub_sec != NULL;
12702 stub_sec = stub_sec->next)
12703 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12704 {
12705 last_fde = p;
12706 last_fde_len = 20;
12707 /* FDE length. */
12708 bfd_put_32 (htab->elf.dynobj, 20, p);
12709 p += 4;
12710 /* CIE pointer. */
12711 val = p - htab->glink_eh_frame->contents;
12712 bfd_put_32 (htab->elf.dynobj, val, p);
12713 p += 4;
12714 /* Offset to stub section, written later. */
12715 p += 4;
12716 /* stub section size. */
12717 bfd_put_32 (htab->elf.dynobj, stub_sec->size, p);
12718 p += 4;
12719 /* Augmentation. */
12720 p += 1;
12721 /* Pad. */
12722 p += 7;
12723 }
12724 if (htab->glink != NULL && htab->glink->size != 0)
12725 {
12726 last_fde = p;
12727 last_fde_len = 20;
12728 /* FDE length. */
12729 bfd_put_32 (htab->elf.dynobj, 20, p);
12730 p += 4;
12731 /* CIE pointer. */
12732 val = p - htab->glink_eh_frame->contents;
12733 bfd_put_32 (htab->elf.dynobj, val, p);
12734 p += 4;
12735 /* Offset to .glink, written later. */
12736 p += 4;
12737 /* .glink size. */
12738 bfd_put_32 (htab->elf.dynobj, htab->glink->size - 8, p);
12739 p += 4;
12740 /* Augmentation. */
12741 p += 1;
12742
12743 *p++ = DW_CFA_advance_loc + 1;
12744 *p++ = DW_CFA_register;
12745 *p++ = 65;
12746 *p++ = htab->opd_abi ? 12 : 0;
12747 *p++ = DW_CFA_advance_loc + 4;
12748 *p++ = DW_CFA_restore_extended;
12749 *p++ = 65;
12750 }
12751 /* Subsume any padding into the last FDE if user .eh_frame
12752 sections are aligned more than glink_eh_frame. Otherwise any
12753 zero padding will be seen as a terminator. */
12754 size = p - htab->glink_eh_frame->contents;
12755 align = 1;
12756 align <<= htab->glink_eh_frame->output_section->alignment_power;
12757 align -= 1;
12758 pad = ((size + align) & ~align) - size;
12759 htab->glink_eh_frame->size = size + pad;
12760 bfd_put_32 (htab->elf.dynobj, last_fde_len + pad, last_fde);
12761 }
12762
12763 maybe_strip_output (info, htab->brlt);
12764 if (htab->glink_eh_frame != NULL)
12765 maybe_strip_output (info, htab->glink_eh_frame);
12766
12767 return TRUE;
12768 }
12769
12770 /* Called after we have determined section placement. If sections
12771 move, we'll be called again. Provide a value for TOCstart. */
12772
12773 bfd_vma
12774 ppc64_elf_set_toc (struct bfd_link_info *info, bfd *obfd)
12775 {
12776 asection *s;
12777 bfd_vma TOCstart, adjust;
12778
12779 if (info != NULL)
12780 {
12781 struct elf_link_hash_entry *h;
12782 struct elf_link_hash_table *htab = elf_hash_table (info);
12783
12784 if (is_elf_hash_table (htab)
12785 && htab->hgot != NULL)
12786 h = htab->hgot;
12787 else
12788 {
12789 h = elf_link_hash_lookup (htab, ".TOC.", FALSE, FALSE, TRUE);
12790 if (is_elf_hash_table (htab))
12791 htab->hgot = h;
12792 }
12793 if (h != NULL
12794 && h->root.type == bfd_link_hash_defined
12795 && !h->root.linker_def
12796 && (!is_elf_hash_table (htab)
12797 || h->def_regular))
12798 {
12799 TOCstart = (h->root.u.def.value - TOC_BASE_OFF
12800 + h->root.u.def.section->output_offset
12801 + h->root.u.def.section->output_section->vma);
12802 _bfd_set_gp_value (obfd, TOCstart);
12803 return TOCstart;
12804 }
12805 }
12806
12807 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
12808 order. The TOC starts where the first of these sections starts. */
12809 s = bfd_get_section_by_name (obfd, ".got");
12810 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12811 s = bfd_get_section_by_name (obfd, ".toc");
12812 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12813 s = bfd_get_section_by_name (obfd, ".tocbss");
12814 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12815 s = bfd_get_section_by_name (obfd, ".plt");
12816 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12817 {
12818 /* This may happen for
12819 o references to TOC base (SYM@toc / TOC[tc0]) without a
12820 .toc directive
12821 o bad linker script
12822 o --gc-sections and empty TOC sections
12823
12824 FIXME: Warn user? */
12825
12826 /* Look for a likely section. We probably won't even be
12827 using TOCstart. */
12828 for (s = obfd->sections; s != NULL; s = s->next)
12829 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY
12830 | SEC_EXCLUDE))
12831 == (SEC_ALLOC | SEC_SMALL_DATA))
12832 break;
12833 if (s == NULL)
12834 for (s = obfd->sections; s != NULL; s = s->next)
12835 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_EXCLUDE))
12836 == (SEC_ALLOC | SEC_SMALL_DATA))
12837 break;
12838 if (s == NULL)
12839 for (s = obfd->sections; s != NULL; s = s->next)
12840 if ((s->flags & (SEC_ALLOC | SEC_READONLY | SEC_EXCLUDE))
12841 == SEC_ALLOC)
12842 break;
12843 if (s == NULL)
12844 for (s = obfd->sections; s != NULL; s = s->next)
12845 if ((s->flags & (SEC_ALLOC | SEC_EXCLUDE)) == SEC_ALLOC)
12846 break;
12847 }
12848
12849 TOCstart = 0;
12850 if (s != NULL)
12851 TOCstart = s->output_section->vma + s->output_offset;
12852
12853 /* Force alignment. */
12854 adjust = TOCstart & (TOC_BASE_ALIGN - 1);
12855 TOCstart -= adjust;
12856 _bfd_set_gp_value (obfd, TOCstart);
12857
12858 if (info != NULL && s != NULL)
12859 {
12860 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12861
12862 if (htab != NULL)
12863 {
12864 if (htab->elf.hgot != NULL)
12865 {
12866 htab->elf.hgot->root.u.def.value = TOC_BASE_OFF - adjust;
12867 htab->elf.hgot->root.u.def.section = s;
12868 }
12869 }
12870 else
12871 {
12872 struct bfd_link_hash_entry *bh = NULL;
12873 _bfd_generic_link_add_one_symbol (info, obfd, ".TOC.", BSF_GLOBAL,
12874 s, TOC_BASE_OFF - adjust,
12875 NULL, FALSE, FALSE, &bh);
12876 }
12877 }
12878 return TOCstart;
12879 }
12880
12881 /* Called via elf_link_hash_traverse from ppc64_elf_build_stubs to
12882 write out any global entry stubs. */
12883
12884 static bfd_boolean
12885 build_global_entry_stubs (struct elf_link_hash_entry *h, void *inf)
12886 {
12887 struct bfd_link_info *info;
12888 struct ppc_link_hash_table *htab;
12889 struct plt_entry *pent;
12890 asection *s;
12891
12892 if (h->root.type == bfd_link_hash_indirect)
12893 return TRUE;
12894
12895 if (!h->pointer_equality_needed)
12896 return TRUE;
12897
12898 if (h->def_regular)
12899 return TRUE;
12900
12901 info = inf;
12902 htab = ppc_hash_table (info);
12903 if (htab == NULL)
12904 return FALSE;
12905
12906 s = htab->glink;
12907 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
12908 if (pent->plt.offset != (bfd_vma) -1
12909 && pent->addend == 0)
12910 {
12911 bfd_byte *p;
12912 asection *plt;
12913 bfd_vma off;
12914
12915 p = s->contents + h->root.u.def.value;
12916 plt = htab->elf.splt;
12917 if (!htab->elf.dynamic_sections_created
12918 || h->dynindx == -1)
12919 plt = htab->elf.iplt;
12920 off = pent->plt.offset + plt->output_offset + plt->output_section->vma;
12921 off -= h->root.u.def.value + s->output_offset + s->output_section->vma;
12922
12923 if (off + 0x80008000 > 0xffffffff || (off & 3) != 0)
12924 {
12925 info->callbacks->einfo
12926 (_("%P: linkage table error against `%T'\n"),
12927 h->root.root.string);
12928 bfd_set_error (bfd_error_bad_value);
12929 htab->stub_error = TRUE;
12930 }
12931
12932 htab->stub_count[ppc_stub_global_entry - 1] += 1;
12933 if (htab->params->emit_stub_syms)
12934 {
12935 size_t len = strlen (h->root.root.string);
12936 char *name = bfd_malloc (sizeof "12345678.global_entry." + len);
12937
12938 if (name == NULL)
12939 return FALSE;
12940
12941 sprintf (name, "%08x.global_entry.%s", s->id, h->root.root.string);
12942 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
12943 if (h == NULL)
12944 return FALSE;
12945 if (h->root.type == bfd_link_hash_new)
12946 {
12947 h->root.type = bfd_link_hash_defined;
12948 h->root.u.def.section = s;
12949 h->root.u.def.value = p - s->contents;
12950 h->ref_regular = 1;
12951 h->def_regular = 1;
12952 h->ref_regular_nonweak = 1;
12953 h->forced_local = 1;
12954 h->non_elf = 0;
12955 h->root.linker_def = 1;
12956 }
12957 }
12958
12959 if (PPC_HA (off) != 0)
12960 {
12961 bfd_put_32 (s->owner, ADDIS_R12_R12 | PPC_HA (off), p);
12962 p += 4;
12963 }
12964 bfd_put_32 (s->owner, LD_R12_0R12 | PPC_LO (off), p);
12965 p += 4;
12966 bfd_put_32 (s->owner, MTCTR_R12, p);
12967 p += 4;
12968 bfd_put_32 (s->owner, BCTR, p);
12969 break;
12970 }
12971 return TRUE;
12972 }
12973
12974 /* Build all the stubs associated with the current output file.
12975 The stubs are kept in a hash table attached to the main linker
12976 hash table. This function is called via gldelf64ppc_finish. */
12977
12978 bfd_boolean
12979 ppc64_elf_build_stubs (struct bfd_link_info *info,
12980 char **stats)
12981 {
12982 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12983 struct map_stub *group;
12984 asection *stub_sec;
12985 bfd_byte *p;
12986 int stub_sec_count = 0;
12987
12988 if (htab == NULL)
12989 return FALSE;
12990
12991 /* Allocate memory to hold the linker stubs. */
12992 for (stub_sec = htab->params->stub_bfd->sections;
12993 stub_sec != NULL;
12994 stub_sec = stub_sec->next)
12995 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
12996 && stub_sec->size != 0)
12997 {
12998 stub_sec->contents = bfd_zalloc (htab->params->stub_bfd, stub_sec->size);
12999 if (stub_sec->contents == NULL)
13000 return FALSE;
13001 stub_sec->size = 0;
13002 }
13003
13004 if (htab->glink != NULL && htab->glink->size != 0)
13005 {
13006 unsigned int indx;
13007 bfd_vma plt0;
13008
13009 /* Build the .glink plt call stub. */
13010 if (htab->params->emit_stub_syms)
13011 {
13012 struct elf_link_hash_entry *h;
13013 h = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
13014 TRUE, FALSE, FALSE);
13015 if (h == NULL)
13016 return FALSE;
13017 if (h->root.type == bfd_link_hash_new)
13018 {
13019 h->root.type = bfd_link_hash_defined;
13020 h->root.u.def.section = htab->glink;
13021 h->root.u.def.value = 8;
13022 h->ref_regular = 1;
13023 h->def_regular = 1;
13024 h->ref_regular_nonweak = 1;
13025 h->forced_local = 1;
13026 h->non_elf = 0;
13027 h->root.linker_def = 1;
13028 }
13029 }
13030 plt0 = (htab->elf.splt->output_section->vma
13031 + htab->elf.splt->output_offset
13032 - 16);
13033 if (info->emitrelocations)
13034 {
13035 Elf_Internal_Rela *r = get_relocs (htab->glink, 1);
13036 if (r == NULL)
13037 return FALSE;
13038 r->r_offset = (htab->glink->output_offset
13039 + htab->glink->output_section->vma);
13040 r->r_info = ELF64_R_INFO (0, R_PPC64_REL64);
13041 r->r_addend = plt0;
13042 }
13043 p = htab->glink->contents;
13044 plt0 -= htab->glink->output_section->vma + htab->glink->output_offset;
13045 bfd_put_64 (htab->glink->owner, plt0, p);
13046 p += 8;
13047 if (htab->opd_abi)
13048 {
13049 bfd_put_32 (htab->glink->owner, MFLR_R12, p);
13050 p += 4;
13051 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
13052 p += 4;
13053 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
13054 p += 4;
13055 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | (-16 & 0xfffc), p);
13056 p += 4;
13057 bfd_put_32 (htab->glink->owner, MTLR_R12, p);
13058 p += 4;
13059 bfd_put_32 (htab->glink->owner, ADD_R11_R2_R11, p);
13060 p += 4;
13061 bfd_put_32 (htab->glink->owner, LD_R12_0R11, p);
13062 p += 4;
13063 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | 8, p);
13064 p += 4;
13065 bfd_put_32 (htab->glink->owner, MTCTR_R12, p);
13066 p += 4;
13067 bfd_put_32 (htab->glink->owner, LD_R11_0R11 | 16, p);
13068 p += 4;
13069 }
13070 else
13071 {
13072 bfd_put_32 (htab->glink->owner, MFLR_R0, p);
13073 p += 4;
13074 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
13075 p += 4;
13076 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
13077 p += 4;
13078 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | (-16 & 0xfffc), p);
13079 p += 4;
13080 bfd_put_32 (htab->glink->owner, MTLR_R0, p);
13081 p += 4;
13082 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
13083 p += 4;
13084 bfd_put_32 (htab->glink->owner, ADD_R11_R2_R11, p);
13085 p += 4;
13086 bfd_put_32 (htab->glink->owner, ADDI_R0_R12 | (-48 & 0xffff), p);
13087 p += 4;
13088 bfd_put_32 (htab->glink->owner, LD_R12_0R11, p);
13089 p += 4;
13090 bfd_put_32 (htab->glink->owner, SRDI_R0_R0_2, p);
13091 p += 4;
13092 bfd_put_32 (htab->glink->owner, MTCTR_R12, p);
13093 p += 4;
13094 bfd_put_32 (htab->glink->owner, LD_R11_0R11 | 8, p);
13095 p += 4;
13096 }
13097 bfd_put_32 (htab->glink->owner, BCTR, p);
13098 p += 4;
13099 while (p - htab->glink->contents < GLINK_CALL_STUB_SIZE)
13100 {
13101 bfd_put_32 (htab->glink->owner, NOP, p);
13102 p += 4;
13103 }
13104
13105 /* Build the .glink lazy link call stubs. */
13106 indx = 0;
13107 while (p < htab->glink->contents + htab->glink->rawsize)
13108 {
13109 if (htab->opd_abi)
13110 {
13111 if (indx < 0x8000)
13112 {
13113 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
13114 p += 4;
13115 }
13116 else
13117 {
13118 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
13119 p += 4;
13120 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx),
13121 p);
13122 p += 4;
13123 }
13124 }
13125 bfd_put_32 (htab->glink->owner,
13126 B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p);
13127 indx++;
13128 p += 4;
13129 }
13130
13131 /* Build .glink global entry stubs. */
13132 if (htab->glink->size > htab->glink->rawsize)
13133 elf_link_hash_traverse (&htab->elf, build_global_entry_stubs, info);
13134 }
13135
13136 if (htab->brlt != NULL && htab->brlt->size != 0)
13137 {
13138 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
13139 htab->brlt->size);
13140 if (htab->brlt->contents == NULL)
13141 return FALSE;
13142 }
13143 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
13144 {
13145 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
13146 htab->relbrlt->size);
13147 if (htab->relbrlt->contents == NULL)
13148 return FALSE;
13149 }
13150
13151 /* Build the stubs as directed by the stub hash table. */
13152 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
13153
13154 for (group = htab->group; group != NULL; group = group->next)
13155 if (group->needs_save_res)
13156 {
13157 stub_sec = group->stub_sec;
13158 memcpy (stub_sec->contents + stub_sec->size, htab->sfpr->contents,
13159 htab->sfpr->size);
13160 if (htab->params->emit_stub_syms)
13161 {
13162 unsigned int i;
13163
13164 for (i = 0; i < ARRAY_SIZE (save_res_funcs); i++)
13165 if (!sfpr_define (info, &save_res_funcs[i], stub_sec))
13166 return FALSE;
13167 }
13168 stub_sec->size += htab->sfpr->size;
13169 }
13170
13171 if (htab->relbrlt != NULL)
13172 htab->relbrlt->reloc_count = 0;
13173
13174 if (htab->params->plt_stub_align != 0)
13175 for (stub_sec = htab->params->stub_bfd->sections;
13176 stub_sec != NULL;
13177 stub_sec = stub_sec->next)
13178 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
13179 stub_sec->size = ((stub_sec->size
13180 + (1 << htab->params->plt_stub_align) - 1)
13181 & -(1 << htab->params->plt_stub_align));
13182
13183 for (stub_sec = htab->params->stub_bfd->sections;
13184 stub_sec != NULL;
13185 stub_sec = stub_sec->next)
13186 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
13187 {
13188 stub_sec_count += 1;
13189 if (stub_sec->rawsize != stub_sec->size
13190 && (htab->stub_iteration <= STUB_SHRINK_ITER
13191 || stub_sec->rawsize < stub_sec->size))
13192 break;
13193 }
13194
13195 /* Note that the glink_eh_frame check here is not only testing that
13196 the generated size matched the calculated size but also that
13197 bfd_elf_discard_info didn't make any changes to the section. */
13198 if (stub_sec != NULL
13199 || (htab->glink_eh_frame != NULL
13200 && htab->glink_eh_frame->rawsize != htab->glink_eh_frame->size))
13201 {
13202 htab->stub_error = TRUE;
13203 info->callbacks->einfo (_("%P: stubs don't match calculated size\n"));
13204 }
13205
13206 if (htab->stub_error)
13207 return FALSE;
13208
13209 if (stats != NULL)
13210 {
13211 *stats = bfd_malloc (500);
13212 if (*stats == NULL)
13213 return FALSE;
13214
13215 sprintf (*stats, _("linker stubs in %u group%s\n"
13216 " branch %lu\n"
13217 " toc adjust %lu\n"
13218 " long branch %lu\n"
13219 " long toc adj %lu\n"
13220 " plt call %lu\n"
13221 " plt call toc %lu\n"
13222 " global entry %lu"),
13223 stub_sec_count,
13224 stub_sec_count == 1 ? "" : "s",
13225 htab->stub_count[ppc_stub_long_branch - 1],
13226 htab->stub_count[ppc_stub_long_branch_r2off - 1],
13227 htab->stub_count[ppc_stub_plt_branch - 1],
13228 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
13229 htab->stub_count[ppc_stub_plt_call - 1],
13230 htab->stub_count[ppc_stub_plt_call_r2save - 1],
13231 htab->stub_count[ppc_stub_global_entry - 1]);
13232 }
13233 return TRUE;
13234 }
13235
13236 /* This function undoes the changes made by add_symbol_adjust. */
13237
13238 static bfd_boolean
13239 undo_symbol_twiddle (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
13240 {
13241 struct ppc_link_hash_entry *eh;
13242
13243 if (h->root.type == bfd_link_hash_indirect)
13244 return TRUE;
13245
13246 eh = (struct ppc_link_hash_entry *) h;
13247 if (eh->elf.root.type != bfd_link_hash_undefweak || !eh->was_undefined)
13248 return TRUE;
13249
13250 eh->elf.root.type = bfd_link_hash_undefined;
13251 return TRUE;
13252 }
13253
13254 void
13255 ppc64_elf_restore_symbols (struct bfd_link_info *info)
13256 {
13257 struct ppc_link_hash_table *htab = ppc_hash_table (info);
13258
13259 if (htab != NULL)
13260 elf_link_hash_traverse (&htab->elf, undo_symbol_twiddle, info);
13261 }
13262
13263 /* What to do when ld finds relocations against symbols defined in
13264 discarded sections. */
13265
13266 static unsigned int
13267 ppc64_elf_action_discarded (asection *sec)
13268 {
13269 if (strcmp (".opd", sec->name) == 0)
13270 return 0;
13271
13272 if (strcmp (".toc", sec->name) == 0)
13273 return 0;
13274
13275 if (strcmp (".toc1", sec->name) == 0)
13276 return 0;
13277
13278 return _bfd_elf_default_action_discarded (sec);
13279 }
13280
13281 /* The RELOCATE_SECTION function is called by the ELF backend linker
13282 to handle the relocations for a section.
13283
13284 The relocs are always passed as Rela structures; if the section
13285 actually uses Rel structures, the r_addend field will always be
13286 zero.
13287
13288 This function is responsible for adjust the section contents as
13289 necessary, and (if using Rela relocs and generating a
13290 relocatable output file) adjusting the reloc addend as
13291 necessary.
13292
13293 This function does not have to worry about setting the reloc
13294 address or the reloc symbol index.
13295
13296 LOCAL_SYMS is a pointer to the swapped in local symbols.
13297
13298 LOCAL_SECTIONS is an array giving the section in the input file
13299 corresponding to the st_shndx field of each local symbol.
13300
13301 The global hash table entry for the global symbols can be found
13302 via elf_sym_hashes (input_bfd).
13303
13304 When generating relocatable output, this function must handle
13305 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
13306 going to be the section symbol corresponding to the output
13307 section, which means that the addend must be adjusted
13308 accordingly. */
13309
13310 static bfd_boolean
13311 ppc64_elf_relocate_section (bfd *output_bfd,
13312 struct bfd_link_info *info,
13313 bfd *input_bfd,
13314 asection *input_section,
13315 bfd_byte *contents,
13316 Elf_Internal_Rela *relocs,
13317 Elf_Internal_Sym *local_syms,
13318 asection **local_sections)
13319 {
13320 struct ppc_link_hash_table *htab;
13321 Elf_Internal_Shdr *symtab_hdr;
13322 struct elf_link_hash_entry **sym_hashes;
13323 Elf_Internal_Rela *rel;
13324 Elf_Internal_Rela *wrel;
13325 Elf_Internal_Rela *relend;
13326 Elf_Internal_Rela outrel;
13327 bfd_byte *loc;
13328 struct got_entry **local_got_ents;
13329 bfd_vma TOCstart;
13330 bfd_boolean ret = TRUE;
13331 bfd_boolean is_opd;
13332 /* Assume 'at' branch hints. */
13333 bfd_boolean is_isa_v2 = TRUE;
13334 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
13335
13336 /* Initialize howto table if needed. */
13337 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
13338 ppc_howto_init ();
13339
13340 htab = ppc_hash_table (info);
13341 if (htab == NULL)
13342 return FALSE;
13343
13344 /* Don't relocate stub sections. */
13345 if (input_section->owner == htab->params->stub_bfd)
13346 return TRUE;
13347
13348 BFD_ASSERT (is_ppc64_elf (input_bfd));
13349
13350 local_got_ents = elf_local_got_ents (input_bfd);
13351 TOCstart = elf_gp (output_bfd);
13352 symtab_hdr = &elf_symtab_hdr (input_bfd);
13353 sym_hashes = elf_sym_hashes (input_bfd);
13354 is_opd = ppc64_elf_section_data (input_section)->sec_type == sec_opd;
13355
13356 rel = wrel = relocs;
13357 relend = relocs + input_section->reloc_count;
13358 for (; rel < relend; wrel++, rel++)
13359 {
13360 enum elf_ppc64_reloc_type r_type;
13361 bfd_vma addend;
13362 bfd_reloc_status_type r;
13363 Elf_Internal_Sym *sym;
13364 asection *sec;
13365 struct elf_link_hash_entry *h_elf;
13366 struct ppc_link_hash_entry *h;
13367 struct ppc_link_hash_entry *fdh;
13368 const char *sym_name;
13369 unsigned long r_symndx, toc_symndx;
13370 bfd_vma toc_addend;
13371 unsigned char tls_mask, tls_gd, tls_type;
13372 unsigned char sym_type;
13373 bfd_vma relocation;
13374 bfd_boolean unresolved_reloc;
13375 bfd_boolean warned;
13376 enum { DEST_NORMAL, DEST_OPD, DEST_STUB } reloc_dest;
13377 unsigned int insn;
13378 unsigned int mask;
13379 struct ppc_stub_hash_entry *stub_entry;
13380 bfd_vma max_br_offset;
13381 bfd_vma from;
13382 Elf_Internal_Rela orig_rel;
13383 reloc_howto_type *howto;
13384 struct reloc_howto_struct alt_howto;
13385
13386 again:
13387 orig_rel = *rel;
13388
13389 r_type = ELF64_R_TYPE (rel->r_info);
13390 r_symndx = ELF64_R_SYM (rel->r_info);
13391
13392 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
13393 symbol of the previous ADDR64 reloc. The symbol gives us the
13394 proper TOC base to use. */
13395 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
13396 && wrel != relocs
13397 && ELF64_R_TYPE (wrel[-1].r_info) == R_PPC64_ADDR64
13398 && is_opd)
13399 r_symndx = ELF64_R_SYM (wrel[-1].r_info);
13400
13401 sym = NULL;
13402 sec = NULL;
13403 h_elf = NULL;
13404 sym_name = NULL;
13405 unresolved_reloc = FALSE;
13406 warned = FALSE;
13407
13408 if (r_symndx < symtab_hdr->sh_info)
13409 {
13410 /* It's a local symbol. */
13411 struct _opd_sec_data *opd;
13412
13413 sym = local_syms + r_symndx;
13414 sec = local_sections[r_symndx];
13415 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
13416 sym_type = ELF64_ST_TYPE (sym->st_info);
13417 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
13418 opd = get_opd_info (sec);
13419 if (opd != NULL && opd->adjust != NULL)
13420 {
13421 long adjust = opd->adjust[OPD_NDX (sym->st_value
13422 + rel->r_addend)];
13423 if (adjust == -1)
13424 relocation = 0;
13425 else
13426 {
13427 /* If this is a relocation against the opd section sym
13428 and we have edited .opd, adjust the reloc addend so
13429 that ld -r and ld --emit-relocs output is correct.
13430 If it is a reloc against some other .opd symbol,
13431 then the symbol value will be adjusted later. */
13432 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
13433 rel->r_addend += adjust;
13434 else
13435 relocation += adjust;
13436 }
13437 }
13438 }
13439 else
13440 {
13441 bfd_boolean ignored;
13442
13443 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
13444 r_symndx, symtab_hdr, sym_hashes,
13445 h_elf, sec, relocation,
13446 unresolved_reloc, warned, ignored);
13447 sym_name = h_elf->root.root.string;
13448 sym_type = h_elf->type;
13449 if (sec != NULL
13450 && sec->owner == output_bfd
13451 && strcmp (sec->name, ".opd") == 0)
13452 {
13453 /* This is a symbol defined in a linker script. All
13454 such are defined in output sections, even those
13455 defined by simple assignment from a symbol defined in
13456 an input section. Transfer the symbol to an
13457 appropriate input .opd section, so that a branch to
13458 this symbol will be mapped to the location specified
13459 by the opd entry. */
13460 struct bfd_link_order *lo;
13461 for (lo = sec->map_head.link_order; lo != NULL; lo = lo->next)
13462 if (lo->type == bfd_indirect_link_order)
13463 {
13464 asection *isec = lo->u.indirect.section;
13465 if (h_elf->root.u.def.value >= isec->output_offset
13466 && h_elf->root.u.def.value < (isec->output_offset
13467 + isec->size))
13468 {
13469 h_elf->root.u.def.value -= isec->output_offset;
13470 h_elf->root.u.def.section = isec;
13471 sec = isec;
13472 break;
13473 }
13474 }
13475 }
13476 }
13477 h = (struct ppc_link_hash_entry *) h_elf;
13478
13479 if (sec != NULL && discarded_section (sec))
13480 {
13481 _bfd_clear_contents (ppc64_elf_howto_table[r_type],
13482 input_bfd, input_section,
13483 contents + rel->r_offset);
13484 wrel->r_offset = rel->r_offset;
13485 wrel->r_info = 0;
13486 wrel->r_addend = 0;
13487
13488 /* For ld -r, remove relocations in debug sections against
13489 sections defined in discarded sections. Not done for
13490 non-debug to preserve relocs in .eh_frame which the
13491 eh_frame editing code expects to be present. */
13492 if (bfd_link_relocatable (info)
13493 && (input_section->flags & SEC_DEBUGGING))
13494 wrel--;
13495
13496 continue;
13497 }
13498
13499 if (bfd_link_relocatable (info))
13500 goto copy_reloc;
13501
13502 if (h != NULL && &h->elf == htab->elf.hgot)
13503 {
13504 relocation = TOCstart + htab->sec_info[input_section->id].toc_off;
13505 sec = bfd_abs_section_ptr;
13506 unresolved_reloc = FALSE;
13507 }
13508
13509 /* TLS optimizations. Replace instruction sequences and relocs
13510 based on information we collected in tls_optimize. We edit
13511 RELOCS so that --emit-relocs will output something sensible
13512 for the final instruction stream. */
13513 tls_mask = 0;
13514 tls_gd = 0;
13515 toc_symndx = 0;
13516 if (h != NULL)
13517 tls_mask = h->tls_mask;
13518 else if (local_got_ents != NULL)
13519 {
13520 struct plt_entry **local_plt = (struct plt_entry **)
13521 (local_got_ents + symtab_hdr->sh_info);
13522 unsigned char *lgot_masks = (unsigned char *)
13523 (local_plt + symtab_hdr->sh_info);
13524 tls_mask = lgot_masks[r_symndx];
13525 }
13526 if (tls_mask == 0
13527 && (r_type == R_PPC64_TLS
13528 || r_type == R_PPC64_TLSGD
13529 || r_type == R_PPC64_TLSLD))
13530 {
13531 /* Check for toc tls entries. */
13532 unsigned char *toc_tls;
13533
13534 if (!get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
13535 &local_syms, rel, input_bfd))
13536 return FALSE;
13537
13538 if (toc_tls)
13539 tls_mask = *toc_tls;
13540 }
13541
13542 /* Check that tls relocs are used with tls syms, and non-tls
13543 relocs are used with non-tls syms. */
13544 if (r_symndx != STN_UNDEF
13545 && r_type != R_PPC64_NONE
13546 && (h == NULL
13547 || h->elf.root.type == bfd_link_hash_defined
13548 || h->elf.root.type == bfd_link_hash_defweak)
13549 && (IS_PPC64_TLS_RELOC (r_type)
13550 != (sym_type == STT_TLS
13551 || (sym_type == STT_SECTION
13552 && (sec->flags & SEC_THREAD_LOCAL) != 0))))
13553 {
13554 if (tls_mask != 0
13555 && (r_type == R_PPC64_TLS
13556 || r_type == R_PPC64_TLSGD
13557 || r_type == R_PPC64_TLSLD))
13558 /* R_PPC64_TLS is OK against a symbol in the TOC. */
13559 ;
13560 else
13561 info->callbacks->einfo
13562 (!IS_PPC64_TLS_RELOC (r_type)
13563 ? _("%P: %H: %s used with TLS symbol `%T'\n")
13564 : _("%P: %H: %s used with non-TLS symbol `%T'\n"),
13565 input_bfd, input_section, rel->r_offset,
13566 ppc64_elf_howto_table[r_type]->name,
13567 sym_name);
13568 }
13569
13570 /* Ensure reloc mapping code below stays sane. */
13571 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
13572 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
13573 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
13574 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
13575 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
13576 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
13577 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
13578 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
13579 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
13580 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
13581 abort ();
13582
13583 switch (r_type)
13584 {
13585 default:
13586 break;
13587
13588 case R_PPC64_LO_DS_OPT:
13589 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
13590 if ((insn & (0x3f << 26)) != 58u << 26)
13591 abort ();
13592 insn += (14u << 26) - (58u << 26);
13593 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
13594 r_type = R_PPC64_TOC16_LO;
13595 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13596 break;
13597
13598 case R_PPC64_TOC16:
13599 case R_PPC64_TOC16_LO:
13600 case R_PPC64_TOC16_DS:
13601 case R_PPC64_TOC16_LO_DS:
13602 {
13603 /* Check for toc tls entries. */
13604 unsigned char *toc_tls;
13605 int retval;
13606
13607 retval = get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
13608 &local_syms, rel, input_bfd);
13609 if (retval == 0)
13610 return FALSE;
13611
13612 if (toc_tls)
13613 {
13614 tls_mask = *toc_tls;
13615 if (r_type == R_PPC64_TOC16_DS
13616 || r_type == R_PPC64_TOC16_LO_DS)
13617 {
13618 if (tls_mask != 0
13619 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
13620 goto toctprel;
13621 }
13622 else
13623 {
13624 /* If we found a GD reloc pair, then we might be
13625 doing a GD->IE transition. */
13626 if (retval == 2)
13627 {
13628 tls_gd = TLS_TPRELGD;
13629 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13630 goto tls_ldgd_opt;
13631 }
13632 else if (retval == 3)
13633 {
13634 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13635 goto tls_ldgd_opt;
13636 }
13637 }
13638 }
13639 }
13640 break;
13641
13642 case R_PPC64_GOT_TPREL16_HI:
13643 case R_PPC64_GOT_TPREL16_HA:
13644 if (tls_mask != 0
13645 && (tls_mask & TLS_TPREL) == 0)
13646 {
13647 rel->r_offset -= d_offset;
13648 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
13649 r_type = R_PPC64_NONE;
13650 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13651 }
13652 break;
13653
13654 case R_PPC64_GOT_TPREL16_DS:
13655 case R_PPC64_GOT_TPREL16_LO_DS:
13656 if (tls_mask != 0
13657 && (tls_mask & TLS_TPREL) == 0)
13658 {
13659 toctprel:
13660 insn = bfd_get_32 (output_bfd,
13661 contents + rel->r_offset - d_offset);
13662 insn &= 31 << 21;
13663 insn |= 0x3c0d0000; /* addis 0,13,0 */
13664 bfd_put_32 (output_bfd, insn,
13665 contents + rel->r_offset - d_offset);
13666 r_type = R_PPC64_TPREL16_HA;
13667 if (toc_symndx != 0)
13668 {
13669 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
13670 rel->r_addend = toc_addend;
13671 /* We changed the symbol. Start over in order to
13672 get h, sym, sec etc. right. */
13673 goto again;
13674 }
13675 else
13676 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13677 }
13678 break;
13679
13680 case R_PPC64_TLS:
13681 if (tls_mask != 0
13682 && (tls_mask & TLS_TPREL) == 0)
13683 {
13684 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
13685 insn = _bfd_elf_ppc_at_tls_transform (insn, 13);
13686 if (insn == 0)
13687 abort ();
13688 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
13689 /* Was PPC64_TLS which sits on insn boundary, now
13690 PPC64_TPREL16_LO which is at low-order half-word. */
13691 rel->r_offset += d_offset;
13692 r_type = R_PPC64_TPREL16_LO;
13693 if (toc_symndx != 0)
13694 {
13695 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
13696 rel->r_addend = toc_addend;
13697 /* We changed the symbol. Start over in order to
13698 get h, sym, sec etc. right. */
13699 goto again;
13700 }
13701 else
13702 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13703 }
13704 break;
13705
13706 case R_PPC64_GOT_TLSGD16_HI:
13707 case R_PPC64_GOT_TLSGD16_HA:
13708 tls_gd = TLS_TPRELGD;
13709 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13710 goto tls_gdld_hi;
13711 break;
13712
13713 case R_PPC64_GOT_TLSLD16_HI:
13714 case R_PPC64_GOT_TLSLD16_HA:
13715 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13716 {
13717 tls_gdld_hi:
13718 if ((tls_mask & tls_gd) != 0)
13719 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
13720 + R_PPC64_GOT_TPREL16_DS);
13721 else
13722 {
13723 rel->r_offset -= d_offset;
13724 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
13725 r_type = R_PPC64_NONE;
13726 }
13727 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13728 }
13729 break;
13730
13731 case R_PPC64_GOT_TLSGD16:
13732 case R_PPC64_GOT_TLSGD16_LO:
13733 tls_gd = TLS_TPRELGD;
13734 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13735 goto tls_ldgd_opt;
13736 break;
13737
13738 case R_PPC64_GOT_TLSLD16:
13739 case R_PPC64_GOT_TLSLD16_LO:
13740 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13741 {
13742 unsigned int insn1, insn2, insn3;
13743 bfd_vma offset;
13744
13745 tls_ldgd_opt:
13746 offset = (bfd_vma) -1;
13747 /* If not using the newer R_PPC64_TLSGD/LD to mark
13748 __tls_get_addr calls, we must trust that the call
13749 stays with its arg setup insns, ie. that the next
13750 reloc is the __tls_get_addr call associated with
13751 the current reloc. Edit both insns. */
13752 if (input_section->has_tls_get_addr_call
13753 && rel + 1 < relend
13754 && branch_reloc_hash_match (input_bfd, rel + 1,
13755 htab->tls_get_addr,
13756 htab->tls_get_addr_fd))
13757 offset = rel[1].r_offset;
13758 /* We read the low GOT_TLS (or TOC16) insn because we
13759 need to keep the destination reg. It may be
13760 something other than the usual r3, and moved to r3
13761 before the call by intervening code. */
13762 insn1 = bfd_get_32 (output_bfd,
13763 contents + rel->r_offset - d_offset);
13764 if ((tls_mask & tls_gd) != 0)
13765 {
13766 /* IE */
13767 insn1 &= (0x1f << 21) | (0x1f << 16);
13768 insn1 |= 58 << 26; /* ld */
13769 insn2 = 0x7c636a14; /* add 3,3,13 */
13770 if (offset != (bfd_vma) -1)
13771 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13772 if ((tls_mask & TLS_EXPLICIT) == 0)
13773 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
13774 + R_PPC64_GOT_TPREL16_DS);
13775 else
13776 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
13777 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13778 }
13779 else
13780 {
13781 /* LE */
13782 insn1 &= 0x1f << 21;
13783 insn1 |= 0x3c0d0000; /* addis r,13,0 */
13784 insn2 = 0x38630000; /* addi 3,3,0 */
13785 if (tls_gd == 0)
13786 {
13787 /* Was an LD reloc. */
13788 if (toc_symndx)
13789 sec = local_sections[toc_symndx];
13790 for (r_symndx = 0;
13791 r_symndx < symtab_hdr->sh_info;
13792 r_symndx++)
13793 if (local_sections[r_symndx] == sec)
13794 break;
13795 if (r_symndx >= symtab_hdr->sh_info)
13796 r_symndx = STN_UNDEF;
13797 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
13798 if (r_symndx != STN_UNDEF)
13799 rel->r_addend -= (local_syms[r_symndx].st_value
13800 + sec->output_offset
13801 + sec->output_section->vma);
13802 }
13803 else if (toc_symndx != 0)
13804 {
13805 r_symndx = toc_symndx;
13806 rel->r_addend = toc_addend;
13807 }
13808 r_type = R_PPC64_TPREL16_HA;
13809 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13810 if (offset != (bfd_vma) -1)
13811 {
13812 rel[1].r_info = ELF64_R_INFO (r_symndx,
13813 R_PPC64_TPREL16_LO);
13814 rel[1].r_offset = offset + d_offset;
13815 rel[1].r_addend = rel->r_addend;
13816 }
13817 }
13818 bfd_put_32 (output_bfd, insn1,
13819 contents + rel->r_offset - d_offset);
13820 if (offset != (bfd_vma) -1)
13821 {
13822 insn3 = bfd_get_32 (output_bfd,
13823 contents + offset + 4);
13824 if (insn3 == NOP
13825 || insn3 == CROR_151515 || insn3 == CROR_313131)
13826 {
13827 rel[1].r_offset += 4;
13828 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
13829 insn2 = NOP;
13830 }
13831 bfd_put_32 (output_bfd, insn2, contents + offset);
13832 }
13833 if ((tls_mask & tls_gd) == 0
13834 && (tls_gd == 0 || toc_symndx != 0))
13835 {
13836 /* We changed the symbol. Start over in order
13837 to get h, sym, sec etc. right. */
13838 goto again;
13839 }
13840 }
13841 break;
13842
13843 case R_PPC64_TLSGD:
13844 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13845 {
13846 unsigned int insn2, insn3;
13847 bfd_vma offset = rel->r_offset;
13848
13849 if ((tls_mask & TLS_TPRELGD) != 0)
13850 {
13851 /* IE */
13852 r_type = R_PPC64_NONE;
13853 insn2 = 0x7c636a14; /* add 3,3,13 */
13854 }
13855 else
13856 {
13857 /* LE */
13858 if (toc_symndx != 0)
13859 {
13860 r_symndx = toc_symndx;
13861 rel->r_addend = toc_addend;
13862 }
13863 r_type = R_PPC64_TPREL16_LO;
13864 rel->r_offset = offset + d_offset;
13865 insn2 = 0x38630000; /* addi 3,3,0 */
13866 }
13867 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13868 /* Zap the reloc on the _tls_get_addr call too. */
13869 BFD_ASSERT (offset == rel[1].r_offset);
13870 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13871 insn3 = bfd_get_32 (output_bfd,
13872 contents + offset + 4);
13873 if (insn3 == NOP
13874 || insn3 == CROR_151515 || insn3 == CROR_313131)
13875 {
13876 rel->r_offset += 4;
13877 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
13878 insn2 = NOP;
13879 }
13880 bfd_put_32 (output_bfd, insn2, contents + offset);
13881 if ((tls_mask & TLS_TPRELGD) == 0 && toc_symndx != 0)
13882 goto again;
13883 }
13884 break;
13885
13886 case R_PPC64_TLSLD:
13887 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13888 {
13889 unsigned int insn2, insn3;
13890 bfd_vma offset = rel->r_offset;
13891
13892 if (toc_symndx)
13893 sec = local_sections[toc_symndx];
13894 for (r_symndx = 0;
13895 r_symndx < symtab_hdr->sh_info;
13896 r_symndx++)
13897 if (local_sections[r_symndx] == sec)
13898 break;
13899 if (r_symndx >= symtab_hdr->sh_info)
13900 r_symndx = STN_UNDEF;
13901 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
13902 if (r_symndx != STN_UNDEF)
13903 rel->r_addend -= (local_syms[r_symndx].st_value
13904 + sec->output_offset
13905 + sec->output_section->vma);
13906
13907 r_type = R_PPC64_TPREL16_LO;
13908 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13909 rel->r_offset = offset + d_offset;
13910 /* Zap the reloc on the _tls_get_addr call too. */
13911 BFD_ASSERT (offset == rel[1].r_offset);
13912 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13913 insn2 = 0x38630000; /* addi 3,3,0 */
13914 insn3 = bfd_get_32 (output_bfd,
13915 contents + offset + 4);
13916 if (insn3 == NOP
13917 || insn3 == CROR_151515 || insn3 == CROR_313131)
13918 {
13919 rel->r_offset += 4;
13920 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
13921 insn2 = NOP;
13922 }
13923 bfd_put_32 (output_bfd, insn2, contents + offset);
13924 goto again;
13925 }
13926 break;
13927
13928 case R_PPC64_DTPMOD64:
13929 if (rel + 1 < relend
13930 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
13931 && rel[1].r_offset == rel->r_offset + 8)
13932 {
13933 if ((tls_mask & TLS_GD) == 0)
13934 {
13935 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
13936 if ((tls_mask & TLS_TPRELGD) != 0)
13937 r_type = R_PPC64_TPREL64;
13938 else
13939 {
13940 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
13941 r_type = R_PPC64_NONE;
13942 }
13943 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13944 }
13945 }
13946 else
13947 {
13948 if ((tls_mask & TLS_LD) == 0)
13949 {
13950 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
13951 r_type = R_PPC64_NONE;
13952 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13953 }
13954 }
13955 break;
13956
13957 case R_PPC64_TPREL64:
13958 if ((tls_mask & TLS_TPREL) == 0)
13959 {
13960 r_type = R_PPC64_NONE;
13961 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13962 }
13963 break;
13964
13965 case R_PPC64_ENTRY:
13966 relocation = TOCstart + htab->sec_info[input_section->id].toc_off;
13967 if (!bfd_link_pic (info)
13968 && !info->traditional_format
13969 && relocation + 0x80008000 <= 0xffffffff)
13970 {
13971 unsigned int insn1, insn2;
13972
13973 insn1 = bfd_get_32 (input_bfd, contents + rel->r_offset);
13974 insn2 = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
13975 if ((insn1 & ~0xfffc) == LD_R2_0R12
13976 && insn2 == ADD_R2_R2_R12)
13977 {
13978 bfd_put_32 (output_bfd,
13979 LIS_R2 + PPC_HA (relocation),
13980 contents + rel->r_offset);
13981 bfd_put_32 (output_bfd,
13982 ADDI_R2_R2 + PPC_LO (relocation),
13983 contents + rel->r_offset + 4);
13984 }
13985 }
13986 else
13987 {
13988 relocation -= (rel->r_offset
13989 + input_section->output_offset
13990 + input_section->output_section->vma);
13991 if (relocation + 0x80008000 <= 0xffffffff)
13992 {
13993 unsigned int insn1, insn2;
13994
13995 insn1 = bfd_get_32 (input_bfd, contents + rel->r_offset);
13996 insn2 = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
13997 if ((insn1 & ~0xfffc) == LD_R2_0R12
13998 && insn2 == ADD_R2_R2_R12)
13999 {
14000 bfd_put_32 (output_bfd,
14001 ADDIS_R2_R12 + PPC_HA (relocation),
14002 contents + rel->r_offset);
14003 bfd_put_32 (output_bfd,
14004 ADDI_R2_R2 + PPC_LO (relocation),
14005 contents + rel->r_offset + 4);
14006 }
14007 }
14008 }
14009 break;
14010
14011 case R_PPC64_REL16_HA:
14012 /* If we are generating a non-PIC executable, edit
14013 . 0: addis 2,12,.TOC.-0b@ha
14014 . addi 2,2,.TOC.-0b@l
14015 used by ELFv2 global entry points to set up r2, to
14016 . lis 2,.TOC.@ha
14017 . addi 2,2,.TOC.@l
14018 if .TOC. is in range. */
14019 if (!bfd_link_pic (info)
14020 && !info->traditional_format
14021 && !htab->opd_abi
14022 && rel->r_addend == d_offset
14023 && h != NULL && &h->elf == htab->elf.hgot
14024 && rel + 1 < relend
14025 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_REL16_LO)
14026 && rel[1].r_offset == rel->r_offset + 4
14027 && rel[1].r_addend == rel->r_addend + 4
14028 && relocation + 0x80008000 <= 0xffffffff)
14029 {
14030 unsigned int insn1, insn2;
14031 bfd_vma offset = rel->r_offset - d_offset;
14032 insn1 = bfd_get_32 (output_bfd, contents + offset);
14033 insn2 = bfd_get_32 (output_bfd, contents + offset + 4);
14034 if ((insn1 & 0xffff0000) == ADDIS_R2_R12
14035 && (insn2 & 0xffff0000) == ADDI_R2_R2)
14036 {
14037 r_type = R_PPC64_ADDR16_HA;
14038 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14039 rel->r_addend -= d_offset;
14040 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_ADDR16_LO);
14041 rel[1].r_addend -= d_offset + 4;
14042 bfd_put_32 (output_bfd, LIS_R2, contents + offset);
14043 }
14044 }
14045 break;
14046 }
14047
14048 /* Handle other relocations that tweak non-addend part of insn. */
14049 insn = 0;
14050 max_br_offset = 1 << 25;
14051 addend = rel->r_addend;
14052 reloc_dest = DEST_NORMAL;
14053 switch (r_type)
14054 {
14055 default:
14056 break;
14057
14058 case R_PPC64_TOCSAVE:
14059 if (relocation + addend == (rel->r_offset
14060 + input_section->output_offset
14061 + input_section->output_section->vma)
14062 && tocsave_find (htab, NO_INSERT,
14063 &local_syms, rel, input_bfd))
14064 {
14065 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
14066 if (insn == NOP
14067 || insn == CROR_151515 || insn == CROR_313131)
14068 bfd_put_32 (input_bfd,
14069 STD_R2_0R1 + STK_TOC (htab),
14070 contents + rel->r_offset);
14071 }
14072 break;
14073
14074 /* Branch taken prediction relocations. */
14075 case R_PPC64_ADDR14_BRTAKEN:
14076 case R_PPC64_REL14_BRTAKEN:
14077 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
14078 /* Fall through. */
14079
14080 /* Branch not taken prediction relocations. */
14081 case R_PPC64_ADDR14_BRNTAKEN:
14082 case R_PPC64_REL14_BRNTAKEN:
14083 insn |= bfd_get_32 (output_bfd,
14084 contents + rel->r_offset) & ~(0x01 << 21);
14085 /* Fall through. */
14086
14087 case R_PPC64_REL14:
14088 max_br_offset = 1 << 15;
14089 /* Fall through. */
14090
14091 case R_PPC64_REL24:
14092 /* Calls to functions with a different TOC, such as calls to
14093 shared objects, need to alter the TOC pointer. This is
14094 done using a linkage stub. A REL24 branching to these
14095 linkage stubs needs to be followed by a nop, as the nop
14096 will be replaced with an instruction to restore the TOC
14097 base pointer. */
14098 fdh = h;
14099 if (h != NULL
14100 && h->oh != NULL
14101 && h->oh->is_func_descriptor)
14102 fdh = ppc_follow_link (h->oh);
14103 stub_entry = ppc_get_stub_entry (input_section, sec, fdh, &orig_rel,
14104 htab);
14105 if (stub_entry != NULL
14106 && (stub_entry->stub_type == ppc_stub_plt_call
14107 || stub_entry->stub_type == ppc_stub_plt_call_r2save
14108 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
14109 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
14110 {
14111 bfd_boolean can_plt_call = FALSE;
14112
14113 /* All of these stubs will modify r2, so there must be a
14114 branch and link followed by a nop. The nop is
14115 replaced by an insn to restore r2. */
14116 if (rel->r_offset + 8 <= input_section->size)
14117 {
14118 unsigned long br;
14119
14120 br = bfd_get_32 (input_bfd,
14121 contents + rel->r_offset);
14122 if ((br & 1) != 0)
14123 {
14124 unsigned long nop;
14125
14126 nop = bfd_get_32 (input_bfd,
14127 contents + rel->r_offset + 4);
14128 if (nop == NOP
14129 || nop == CROR_151515 || nop == CROR_313131)
14130 {
14131 if (h != NULL
14132 && (h == htab->tls_get_addr_fd
14133 || h == htab->tls_get_addr)
14134 && htab->params->tls_get_addr_opt)
14135 {
14136 /* Special stub used, leave nop alone. */
14137 }
14138 else
14139 bfd_put_32 (input_bfd,
14140 LD_R2_0R1 + STK_TOC (htab),
14141 contents + rel->r_offset + 4);
14142 can_plt_call = TRUE;
14143 }
14144 }
14145 }
14146
14147 if (!can_plt_call && h != NULL)
14148 {
14149 const char *name = h->elf.root.root.string;
14150
14151 if (*name == '.')
14152 ++name;
14153
14154 if (strncmp (name, "__libc_start_main", 17) == 0
14155 && (name[17] == 0 || name[17] == '@'))
14156 {
14157 /* Allow crt1 branch to go via a toc adjusting
14158 stub. Other calls that never return could do
14159 the same, if we could detect such. */
14160 can_plt_call = TRUE;
14161 }
14162 }
14163
14164 if (!can_plt_call)
14165 {
14166 /* g++ as of 20130507 emits self-calls without a
14167 following nop. This is arguably wrong since we
14168 have conflicting information. On the one hand a
14169 global symbol and on the other a local call
14170 sequence, but don't error for this special case.
14171 It isn't possible to cheaply verify we have
14172 exactly such a call. Allow all calls to the same
14173 section. */
14174 asection *code_sec = sec;
14175
14176 if (get_opd_info (sec) != NULL)
14177 {
14178 bfd_vma off = (relocation + addend
14179 - sec->output_section->vma
14180 - sec->output_offset);
14181
14182 opd_entry_value (sec, off, &code_sec, NULL, FALSE);
14183 }
14184 if (code_sec == input_section)
14185 can_plt_call = TRUE;
14186 }
14187
14188 if (!can_plt_call)
14189 {
14190 if (stub_entry->stub_type == ppc_stub_plt_call
14191 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14192 info->callbacks->einfo
14193 (_("%P: %H: call to `%T' lacks nop, can't restore toc; "
14194 "recompile with -fPIC\n"),
14195 input_bfd, input_section, rel->r_offset, sym_name);
14196 else
14197 info->callbacks->einfo
14198 (_("%P: %H: call to `%T' lacks nop, can't restore toc; "
14199 "(-mcmodel=small toc adjust stub)\n"),
14200 input_bfd, input_section, rel->r_offset, sym_name);
14201
14202 bfd_set_error (bfd_error_bad_value);
14203 ret = FALSE;
14204 }
14205
14206 if (can_plt_call
14207 && (stub_entry->stub_type == ppc_stub_plt_call
14208 || stub_entry->stub_type == ppc_stub_plt_call_r2save))
14209 unresolved_reloc = FALSE;
14210 }
14211
14212 if ((stub_entry == NULL
14213 || stub_entry->stub_type == ppc_stub_long_branch
14214 || stub_entry->stub_type == ppc_stub_plt_branch)
14215 && get_opd_info (sec) != NULL)
14216 {
14217 /* The branch destination is the value of the opd entry. */
14218 bfd_vma off = (relocation + addend
14219 - sec->output_section->vma
14220 - sec->output_offset);
14221 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL, FALSE);
14222 if (dest != (bfd_vma) -1)
14223 {
14224 relocation = dest;
14225 addend = 0;
14226 reloc_dest = DEST_OPD;
14227 }
14228 }
14229
14230 /* If the branch is out of reach we ought to have a long
14231 branch stub. */
14232 from = (rel->r_offset
14233 + input_section->output_offset
14234 + input_section->output_section->vma);
14235
14236 relocation += PPC64_LOCAL_ENTRY_OFFSET (fdh
14237 ? fdh->elf.other
14238 : sym->st_other);
14239
14240 if (stub_entry != NULL
14241 && (stub_entry->stub_type == ppc_stub_long_branch
14242 || stub_entry->stub_type == ppc_stub_plt_branch)
14243 && (r_type == R_PPC64_ADDR14_BRTAKEN
14244 || r_type == R_PPC64_ADDR14_BRNTAKEN
14245 || (relocation + addend - from + max_br_offset
14246 < 2 * max_br_offset)))
14247 /* Don't use the stub if this branch is in range. */
14248 stub_entry = NULL;
14249
14250 if (stub_entry != NULL)
14251 {
14252 /* Munge up the value and addend so that we call the stub
14253 rather than the procedure directly. */
14254 asection *stub_sec = stub_entry->group->stub_sec;
14255
14256 if (stub_entry->stub_type == ppc_stub_save_res)
14257 relocation += (stub_sec->output_offset
14258 + stub_sec->output_section->vma
14259 + stub_sec->size - htab->sfpr->size
14260 - htab->sfpr->output_offset
14261 - htab->sfpr->output_section->vma);
14262 else
14263 relocation = (stub_entry->stub_offset
14264 + stub_sec->output_offset
14265 + stub_sec->output_section->vma);
14266 addend = 0;
14267 reloc_dest = DEST_STUB;
14268
14269 if ((stub_entry->stub_type == ppc_stub_plt_call
14270 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14271 && (ALWAYS_EMIT_R2SAVE
14272 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14273 && rel + 1 < relend
14274 && rel[1].r_offset == rel->r_offset + 4
14275 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOCSAVE)
14276 relocation += 4;
14277 }
14278
14279 if (insn != 0)
14280 {
14281 if (is_isa_v2)
14282 {
14283 /* Set 'a' bit. This is 0b00010 in BO field for branch
14284 on CR(BI) insns (BO == 001at or 011at), and 0b01000
14285 for branch on CTR insns (BO == 1a00t or 1a01t). */
14286 if ((insn & (0x14 << 21)) == (0x04 << 21))
14287 insn |= 0x02 << 21;
14288 else if ((insn & (0x14 << 21)) == (0x10 << 21))
14289 insn |= 0x08 << 21;
14290 else
14291 break;
14292 }
14293 else
14294 {
14295 /* Invert 'y' bit if not the default. */
14296 if ((bfd_signed_vma) (relocation + addend - from) < 0)
14297 insn ^= 0x01 << 21;
14298 }
14299
14300 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
14301 }
14302
14303 /* NOP out calls to undefined weak functions.
14304 We can thus call a weak function without first
14305 checking whether the function is defined. */
14306 else if (h != NULL
14307 && h->elf.root.type == bfd_link_hash_undefweak
14308 && h->elf.dynindx == -1
14309 && r_type == R_PPC64_REL24
14310 && relocation == 0
14311 && addend == 0)
14312 {
14313 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
14314 goto copy_reloc;
14315 }
14316 break;
14317 }
14318
14319 /* Set `addend'. */
14320 tls_type = 0;
14321 switch (r_type)
14322 {
14323 default:
14324 info->callbacks->einfo
14325 (_("%P: %B: unknown relocation type %d for `%T'\n"),
14326 input_bfd, (int) r_type, sym_name);
14327
14328 bfd_set_error (bfd_error_bad_value);
14329 ret = FALSE;
14330 goto copy_reloc;
14331
14332 case R_PPC64_NONE:
14333 case R_PPC64_TLS:
14334 case R_PPC64_TLSGD:
14335 case R_PPC64_TLSLD:
14336 case R_PPC64_TOCSAVE:
14337 case R_PPC64_GNU_VTINHERIT:
14338 case R_PPC64_GNU_VTENTRY:
14339 case R_PPC64_ENTRY:
14340 goto copy_reloc;
14341
14342 /* GOT16 relocations. Like an ADDR16 using the symbol's
14343 address in the GOT as relocation value instead of the
14344 symbol's value itself. Also, create a GOT entry for the
14345 symbol and put the symbol value there. */
14346 case R_PPC64_GOT_TLSGD16:
14347 case R_PPC64_GOT_TLSGD16_LO:
14348 case R_PPC64_GOT_TLSGD16_HI:
14349 case R_PPC64_GOT_TLSGD16_HA:
14350 tls_type = TLS_TLS | TLS_GD;
14351 goto dogot;
14352
14353 case R_PPC64_GOT_TLSLD16:
14354 case R_PPC64_GOT_TLSLD16_LO:
14355 case R_PPC64_GOT_TLSLD16_HI:
14356 case R_PPC64_GOT_TLSLD16_HA:
14357 tls_type = TLS_TLS | TLS_LD;
14358 goto dogot;
14359
14360 case R_PPC64_GOT_TPREL16_DS:
14361 case R_PPC64_GOT_TPREL16_LO_DS:
14362 case R_PPC64_GOT_TPREL16_HI:
14363 case R_PPC64_GOT_TPREL16_HA:
14364 tls_type = TLS_TLS | TLS_TPREL;
14365 goto dogot;
14366
14367 case R_PPC64_GOT_DTPREL16_DS:
14368 case R_PPC64_GOT_DTPREL16_LO_DS:
14369 case R_PPC64_GOT_DTPREL16_HI:
14370 case R_PPC64_GOT_DTPREL16_HA:
14371 tls_type = TLS_TLS | TLS_DTPREL;
14372 goto dogot;
14373
14374 case R_PPC64_GOT16:
14375 case R_PPC64_GOT16_LO:
14376 case R_PPC64_GOT16_HI:
14377 case R_PPC64_GOT16_HA:
14378 case R_PPC64_GOT16_DS:
14379 case R_PPC64_GOT16_LO_DS:
14380 dogot:
14381 {
14382 /* Relocation is to the entry for this symbol in the global
14383 offset table. */
14384 asection *got;
14385 bfd_vma *offp;
14386 bfd_vma off;
14387 unsigned long indx = 0;
14388 struct got_entry *ent;
14389
14390 if (tls_type == (TLS_TLS | TLS_LD)
14391 && (h == NULL
14392 || !h->elf.def_dynamic))
14393 ent = ppc64_tlsld_got (input_bfd);
14394 else
14395 {
14396
14397 if (h != NULL)
14398 {
14399 bfd_boolean dyn = htab->elf.dynamic_sections_created;
14400 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, bfd_link_pic (info),
14401 &h->elf)
14402 || (bfd_link_pic (info)
14403 && SYMBOL_REFERENCES_LOCAL (info, &h->elf)))
14404 /* This is actually a static link, or it is a
14405 -Bsymbolic link and the symbol is defined
14406 locally, or the symbol was forced to be local
14407 because of a version file. */
14408 ;
14409 else
14410 {
14411 BFD_ASSERT (h->elf.dynindx != -1);
14412 indx = h->elf.dynindx;
14413 unresolved_reloc = FALSE;
14414 }
14415 ent = h->elf.got.glist;
14416 }
14417 else
14418 {
14419 if (local_got_ents == NULL)
14420 abort ();
14421 ent = local_got_ents[r_symndx];
14422 }
14423
14424 for (; ent != NULL; ent = ent->next)
14425 if (ent->addend == orig_rel.r_addend
14426 && ent->owner == input_bfd
14427 && ent->tls_type == tls_type)
14428 break;
14429 }
14430
14431 if (ent == NULL)
14432 abort ();
14433 if (ent->is_indirect)
14434 ent = ent->got.ent;
14435 offp = &ent->got.offset;
14436 got = ppc64_elf_tdata (ent->owner)->got;
14437 if (got == NULL)
14438 abort ();
14439
14440 /* The offset must always be a multiple of 8. We use the
14441 least significant bit to record whether we have already
14442 processed this entry. */
14443 off = *offp;
14444 if ((off & 1) != 0)
14445 off &= ~1;
14446 else
14447 {
14448 /* Generate relocs for the dynamic linker, except in
14449 the case of TLSLD where we'll use one entry per
14450 module. */
14451 asection *relgot;
14452 bfd_boolean ifunc;
14453
14454 *offp = off | 1;
14455 relgot = NULL;
14456 ifunc = (h != NULL
14457 ? h->elf.type == STT_GNU_IFUNC
14458 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC);
14459 if (ifunc)
14460 relgot = htab->elf.irelplt;
14461 else if ((bfd_link_pic (info) || indx != 0)
14462 && (h == NULL
14463 || (tls_type == (TLS_TLS | TLS_LD)
14464 && !h->elf.def_dynamic)
14465 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
14466 || h->elf.root.type != bfd_link_hash_undefweak))
14467 relgot = ppc64_elf_tdata (ent->owner)->relgot;
14468 if (relgot != NULL)
14469 {
14470 outrel.r_offset = (got->output_section->vma
14471 + got->output_offset
14472 + off);
14473 outrel.r_addend = addend;
14474 if (tls_type & (TLS_LD | TLS_GD))
14475 {
14476 outrel.r_addend = 0;
14477 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
14478 if (tls_type == (TLS_TLS | TLS_GD))
14479 {
14480 loc = relgot->contents;
14481 loc += (relgot->reloc_count++
14482 * sizeof (Elf64_External_Rela));
14483 bfd_elf64_swap_reloca_out (output_bfd,
14484 &outrel, loc);
14485 outrel.r_offset += 8;
14486 outrel.r_addend = addend;
14487 outrel.r_info
14488 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
14489 }
14490 }
14491 else if (tls_type == (TLS_TLS | TLS_DTPREL))
14492 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
14493 else if (tls_type == (TLS_TLS | TLS_TPREL))
14494 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
14495 else if (indx != 0)
14496 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
14497 else
14498 {
14499 if (ifunc)
14500 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
14501 else
14502 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
14503
14504 /* Write the .got section contents for the sake
14505 of prelink. */
14506 loc = got->contents + off;
14507 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
14508 loc);
14509 }
14510
14511 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
14512 {
14513 outrel.r_addend += relocation;
14514 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
14515 {
14516 if (htab->elf.tls_sec == NULL)
14517 outrel.r_addend = 0;
14518 else
14519 outrel.r_addend -= htab->elf.tls_sec->vma;
14520 }
14521 }
14522 loc = relgot->contents;
14523 loc += (relgot->reloc_count++
14524 * sizeof (Elf64_External_Rela));
14525 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
14526 }
14527
14528 /* Init the .got section contents here if we're not
14529 emitting a reloc. */
14530 else
14531 {
14532 relocation += addend;
14533 if (tls_type == (TLS_TLS | TLS_LD))
14534 relocation = 1;
14535 else if (tls_type != 0)
14536 {
14537 if (htab->elf.tls_sec == NULL)
14538 relocation = 0;
14539 else
14540 {
14541 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
14542 if (tls_type == (TLS_TLS | TLS_TPREL))
14543 relocation += DTP_OFFSET - TP_OFFSET;
14544 }
14545
14546 if (tls_type == (TLS_TLS | TLS_GD))
14547 {
14548 bfd_put_64 (output_bfd, relocation,
14549 got->contents + off + 8);
14550 relocation = 1;
14551 }
14552 }
14553
14554 bfd_put_64 (output_bfd, relocation,
14555 got->contents + off);
14556 }
14557 }
14558
14559 if (off >= (bfd_vma) -2)
14560 abort ();
14561
14562 relocation = got->output_section->vma + got->output_offset + off;
14563 addend = -(TOCstart + htab->sec_info[input_section->id].toc_off);
14564 }
14565 break;
14566
14567 case R_PPC64_PLT16_HA:
14568 case R_PPC64_PLT16_HI:
14569 case R_PPC64_PLT16_LO:
14570 case R_PPC64_PLT32:
14571 case R_PPC64_PLT64:
14572 /* Relocation is to the entry for this symbol in the
14573 procedure linkage table. */
14574 {
14575 struct plt_entry **plt_list = NULL;
14576 if (h != NULL)
14577 plt_list = &h->elf.plt.plist;
14578 else if (local_got_ents != NULL)
14579 {
14580 struct plt_entry **local_plt = (struct plt_entry **)
14581 (local_got_ents + symtab_hdr->sh_info);
14582 unsigned char *local_got_tls_masks = (unsigned char *)
14583 (local_plt + symtab_hdr->sh_info);
14584 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
14585 plt_list = local_plt + r_symndx;
14586 }
14587 if (plt_list)
14588 {
14589 struct plt_entry *ent;
14590
14591 for (ent = *plt_list; ent != NULL; ent = ent->next)
14592 if (ent->plt.offset != (bfd_vma) -1
14593 && ent->addend == orig_rel.r_addend)
14594 {
14595 asection *plt;
14596
14597 plt = htab->elf.splt;
14598 if (!htab->elf.dynamic_sections_created
14599 || h == NULL
14600 || h->elf.dynindx == -1)
14601 plt = htab->elf.iplt;
14602 relocation = (plt->output_section->vma
14603 + plt->output_offset
14604 + ent->plt.offset);
14605 addend = 0;
14606 unresolved_reloc = FALSE;
14607 break;
14608 }
14609 }
14610 }
14611 break;
14612
14613 case R_PPC64_TOC:
14614 /* Relocation value is TOC base. */
14615 relocation = TOCstart;
14616 if (r_symndx == STN_UNDEF)
14617 relocation += htab->sec_info[input_section->id].toc_off;
14618 else if (unresolved_reloc)
14619 ;
14620 else if (sec != NULL && sec->id < htab->sec_info_arr_size)
14621 relocation += htab->sec_info[sec->id].toc_off;
14622 else
14623 unresolved_reloc = TRUE;
14624 goto dodyn;
14625
14626 /* TOC16 relocs. We want the offset relative to the TOC base,
14627 which is the address of the start of the TOC plus 0x8000.
14628 The TOC consists of sections .got, .toc, .tocbss, and .plt,
14629 in this order. */
14630 case R_PPC64_TOC16:
14631 case R_PPC64_TOC16_LO:
14632 case R_PPC64_TOC16_HI:
14633 case R_PPC64_TOC16_DS:
14634 case R_PPC64_TOC16_LO_DS:
14635 case R_PPC64_TOC16_HA:
14636 addend -= TOCstart + htab->sec_info[input_section->id].toc_off;
14637 break;
14638
14639 /* Relocate against the beginning of the section. */
14640 case R_PPC64_SECTOFF:
14641 case R_PPC64_SECTOFF_LO:
14642 case R_PPC64_SECTOFF_HI:
14643 case R_PPC64_SECTOFF_DS:
14644 case R_PPC64_SECTOFF_LO_DS:
14645 case R_PPC64_SECTOFF_HA:
14646 if (sec != NULL)
14647 addend -= sec->output_section->vma;
14648 break;
14649
14650 case R_PPC64_REL16:
14651 case R_PPC64_REL16_LO:
14652 case R_PPC64_REL16_HI:
14653 case R_PPC64_REL16_HA:
14654 case R_PPC64_REL16DX_HA:
14655 break;
14656
14657 case R_PPC64_REL14:
14658 case R_PPC64_REL14_BRNTAKEN:
14659 case R_PPC64_REL14_BRTAKEN:
14660 case R_PPC64_REL24:
14661 break;
14662
14663 case R_PPC64_TPREL16:
14664 case R_PPC64_TPREL16_LO:
14665 case R_PPC64_TPREL16_HI:
14666 case R_PPC64_TPREL16_HA:
14667 case R_PPC64_TPREL16_DS:
14668 case R_PPC64_TPREL16_LO_DS:
14669 case R_PPC64_TPREL16_HIGH:
14670 case R_PPC64_TPREL16_HIGHA:
14671 case R_PPC64_TPREL16_HIGHER:
14672 case R_PPC64_TPREL16_HIGHERA:
14673 case R_PPC64_TPREL16_HIGHEST:
14674 case R_PPC64_TPREL16_HIGHESTA:
14675 if (h != NULL
14676 && h->elf.root.type == bfd_link_hash_undefweak
14677 && h->elf.dynindx == -1)
14678 {
14679 /* Make this relocation against an undefined weak symbol
14680 resolve to zero. This is really just a tweak, since
14681 code using weak externs ought to check that they are
14682 defined before using them. */
14683 bfd_byte *p = contents + rel->r_offset - d_offset;
14684
14685 insn = bfd_get_32 (output_bfd, p);
14686 insn = _bfd_elf_ppc_at_tprel_transform (insn, 13);
14687 if (insn != 0)
14688 bfd_put_32 (output_bfd, insn, p);
14689 break;
14690 }
14691 if (htab->elf.tls_sec != NULL)
14692 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
14693 if (bfd_link_pic (info))
14694 /* The TPREL16 relocs shouldn't really be used in shared
14695 libs as they will result in DT_TEXTREL being set, but
14696 support them anyway. */
14697 goto dodyn;
14698 break;
14699
14700 case R_PPC64_DTPREL16:
14701 case R_PPC64_DTPREL16_LO:
14702 case R_PPC64_DTPREL16_HI:
14703 case R_PPC64_DTPREL16_HA:
14704 case R_PPC64_DTPREL16_DS:
14705 case R_PPC64_DTPREL16_LO_DS:
14706 case R_PPC64_DTPREL16_HIGH:
14707 case R_PPC64_DTPREL16_HIGHA:
14708 case R_PPC64_DTPREL16_HIGHER:
14709 case R_PPC64_DTPREL16_HIGHERA:
14710 case R_PPC64_DTPREL16_HIGHEST:
14711 case R_PPC64_DTPREL16_HIGHESTA:
14712 if (htab->elf.tls_sec != NULL)
14713 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
14714 break;
14715
14716 case R_PPC64_ADDR64_LOCAL:
14717 addend += PPC64_LOCAL_ENTRY_OFFSET (h != NULL
14718 ? h->elf.other
14719 : sym->st_other);
14720 break;
14721
14722 case R_PPC64_DTPMOD64:
14723 relocation = 1;
14724 addend = 0;
14725 goto dodyn;
14726
14727 case R_PPC64_TPREL64:
14728 if (htab->elf.tls_sec != NULL)
14729 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
14730 goto dodyn;
14731
14732 case R_PPC64_DTPREL64:
14733 if (htab->elf.tls_sec != NULL)
14734 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
14735 /* Fall through. */
14736
14737 /* Relocations that may need to be propagated if this is a
14738 dynamic object. */
14739 case R_PPC64_REL30:
14740 case R_PPC64_REL32:
14741 case R_PPC64_REL64:
14742 case R_PPC64_ADDR14:
14743 case R_PPC64_ADDR14_BRNTAKEN:
14744 case R_PPC64_ADDR14_BRTAKEN:
14745 case R_PPC64_ADDR16:
14746 case R_PPC64_ADDR16_DS:
14747 case R_PPC64_ADDR16_HA:
14748 case R_PPC64_ADDR16_HI:
14749 case R_PPC64_ADDR16_HIGH:
14750 case R_PPC64_ADDR16_HIGHA:
14751 case R_PPC64_ADDR16_HIGHER:
14752 case R_PPC64_ADDR16_HIGHERA:
14753 case R_PPC64_ADDR16_HIGHEST:
14754 case R_PPC64_ADDR16_HIGHESTA:
14755 case R_PPC64_ADDR16_LO:
14756 case R_PPC64_ADDR16_LO_DS:
14757 case R_PPC64_ADDR24:
14758 case R_PPC64_ADDR32:
14759 case R_PPC64_ADDR64:
14760 case R_PPC64_UADDR16:
14761 case R_PPC64_UADDR32:
14762 case R_PPC64_UADDR64:
14763 dodyn:
14764 if ((input_section->flags & SEC_ALLOC) == 0)
14765 break;
14766
14767 if (NO_OPD_RELOCS && is_opd)
14768 break;
14769
14770 if (bfd_link_pic (info)
14771 ? ((h != NULL && pc_dynrelocs (h))
14772 || must_be_dyn_reloc (info, r_type))
14773 : (h != NULL
14774 ? h->dyn_relocs != NULL
14775 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
14776 {
14777 bfd_boolean skip, relocate;
14778 asection *sreloc;
14779 bfd_vma out_off;
14780
14781 /* When generating a dynamic object, these relocations
14782 are copied into the output file to be resolved at run
14783 time. */
14784
14785 skip = FALSE;
14786 relocate = FALSE;
14787
14788 out_off = _bfd_elf_section_offset (output_bfd, info,
14789 input_section, rel->r_offset);
14790 if (out_off == (bfd_vma) -1)
14791 skip = TRUE;
14792 else if (out_off == (bfd_vma) -2)
14793 skip = TRUE, relocate = TRUE;
14794 out_off += (input_section->output_section->vma
14795 + input_section->output_offset);
14796 outrel.r_offset = out_off;
14797 outrel.r_addend = rel->r_addend;
14798
14799 /* Optimize unaligned reloc use. */
14800 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
14801 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
14802 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
14803 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
14804 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
14805 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
14806 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
14807 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
14808 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
14809
14810 if (skip)
14811 memset (&outrel, 0, sizeof outrel);
14812 else if (!SYMBOL_REFERENCES_LOCAL (info, &h->elf)
14813 && !is_opd
14814 && r_type != R_PPC64_TOC)
14815 {
14816 BFD_ASSERT (h->elf.dynindx != -1);
14817 outrel.r_info = ELF64_R_INFO (h->elf.dynindx, r_type);
14818 }
14819 else
14820 {
14821 /* This symbol is local, or marked to become local,
14822 or this is an opd section reloc which must point
14823 at a local function. */
14824 outrel.r_addend += relocation;
14825 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
14826 {
14827 if (is_opd && h != NULL)
14828 {
14829 /* Lie about opd entries. This case occurs
14830 when building shared libraries and we
14831 reference a function in another shared
14832 lib. The same thing happens for a weak
14833 definition in an application that's
14834 overridden by a strong definition in a
14835 shared lib. (I believe this is a generic
14836 bug in binutils handling of weak syms.)
14837 In these cases we won't use the opd
14838 entry in this lib. */
14839 unresolved_reloc = FALSE;
14840 }
14841 if (!is_opd
14842 && r_type == R_PPC64_ADDR64
14843 && (h != NULL
14844 ? h->elf.type == STT_GNU_IFUNC
14845 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
14846 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
14847 else
14848 {
14849 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
14850
14851 /* We need to relocate .opd contents for ld.so.
14852 Prelink also wants simple and consistent rules
14853 for relocs. This make all RELATIVE relocs have
14854 *r_offset equal to r_addend. */
14855 relocate = TRUE;
14856 }
14857 }
14858 else
14859 {
14860 long indx = 0;
14861
14862 if (h != NULL
14863 ? h->elf.type == STT_GNU_IFUNC
14864 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
14865 {
14866 info->callbacks->einfo
14867 (_("%P: %H: %s for indirect "
14868 "function `%T' unsupported\n"),
14869 input_bfd, input_section, rel->r_offset,
14870 ppc64_elf_howto_table[r_type]->name,
14871 sym_name);
14872 ret = FALSE;
14873 }
14874 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
14875 ;
14876 else if (sec == NULL || sec->owner == NULL)
14877 {
14878 bfd_set_error (bfd_error_bad_value);
14879 return FALSE;
14880 }
14881 else
14882 {
14883 asection *osec;
14884
14885 osec = sec->output_section;
14886 indx = elf_section_data (osec)->dynindx;
14887
14888 if (indx == 0)
14889 {
14890 if ((osec->flags & SEC_READONLY) == 0
14891 && htab->elf.data_index_section != NULL)
14892 osec = htab->elf.data_index_section;
14893 else
14894 osec = htab->elf.text_index_section;
14895 indx = elf_section_data (osec)->dynindx;
14896 }
14897 BFD_ASSERT (indx != 0);
14898
14899 /* We are turning this relocation into one
14900 against a section symbol, so subtract out
14901 the output section's address but not the
14902 offset of the input section in the output
14903 section. */
14904 outrel.r_addend -= osec->vma;
14905 }
14906
14907 outrel.r_info = ELF64_R_INFO (indx, r_type);
14908 }
14909 }
14910
14911 sreloc = elf_section_data (input_section)->sreloc;
14912 if (h != NULL
14913 ? h->elf.type == STT_GNU_IFUNC
14914 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
14915 sreloc = htab->elf.irelplt;
14916 if (sreloc == NULL)
14917 abort ();
14918
14919 if (sreloc->reloc_count * sizeof (Elf64_External_Rela)
14920 >= sreloc->size)
14921 abort ();
14922 loc = sreloc->contents;
14923 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
14924 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
14925
14926 /* If this reloc is against an external symbol, it will
14927 be computed at runtime, so there's no need to do
14928 anything now. However, for the sake of prelink ensure
14929 that the section contents are a known value. */
14930 if (! relocate)
14931 {
14932 unresolved_reloc = FALSE;
14933 /* The value chosen here is quite arbitrary as ld.so
14934 ignores section contents except for the special
14935 case of .opd where the contents might be accessed
14936 before relocation. Choose zero, as that won't
14937 cause reloc overflow. */
14938 relocation = 0;
14939 addend = 0;
14940 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
14941 to improve backward compatibility with older
14942 versions of ld. */
14943 if (r_type == R_PPC64_ADDR64)
14944 addend = outrel.r_addend;
14945 /* Adjust pc_relative relocs to have zero in *r_offset. */
14946 else if (ppc64_elf_howto_table[r_type]->pc_relative)
14947 addend = (input_section->output_section->vma
14948 + input_section->output_offset
14949 + rel->r_offset);
14950 }
14951 }
14952 break;
14953
14954 case R_PPC64_COPY:
14955 case R_PPC64_GLOB_DAT:
14956 case R_PPC64_JMP_SLOT:
14957 case R_PPC64_JMP_IREL:
14958 case R_PPC64_RELATIVE:
14959 /* We shouldn't ever see these dynamic relocs in relocatable
14960 files. */
14961 /* Fall through. */
14962
14963 case R_PPC64_PLTGOT16:
14964 case R_PPC64_PLTGOT16_DS:
14965 case R_PPC64_PLTGOT16_HA:
14966 case R_PPC64_PLTGOT16_HI:
14967 case R_PPC64_PLTGOT16_LO:
14968 case R_PPC64_PLTGOT16_LO_DS:
14969 case R_PPC64_PLTREL32:
14970 case R_PPC64_PLTREL64:
14971 /* These ones haven't been implemented yet. */
14972
14973 info->callbacks->einfo
14974 (_("%P: %B: %s is not supported for `%T'\n"),
14975 input_bfd,
14976 ppc64_elf_howto_table[r_type]->name, sym_name);
14977
14978 bfd_set_error (bfd_error_invalid_operation);
14979 ret = FALSE;
14980 goto copy_reloc;
14981 }
14982
14983 /* Multi-instruction sequences that access the TOC can be
14984 optimized, eg. addis ra,r2,0; addi rb,ra,x;
14985 to nop; addi rb,r2,x; */
14986 switch (r_type)
14987 {
14988 default:
14989 break;
14990
14991 case R_PPC64_GOT_TLSLD16_HI:
14992 case R_PPC64_GOT_TLSGD16_HI:
14993 case R_PPC64_GOT_TPREL16_HI:
14994 case R_PPC64_GOT_DTPREL16_HI:
14995 case R_PPC64_GOT16_HI:
14996 case R_PPC64_TOC16_HI:
14997 /* These relocs would only be useful if building up an
14998 offset to later add to r2, perhaps in an indexed
14999 addressing mode instruction. Don't try to optimize.
15000 Unfortunately, the possibility of someone building up an
15001 offset like this or even with the HA relocs, means that
15002 we need to check the high insn when optimizing the low
15003 insn. */
15004 break;
15005
15006 case R_PPC64_GOT_TLSLD16_HA:
15007 case R_PPC64_GOT_TLSGD16_HA:
15008 case R_PPC64_GOT_TPREL16_HA:
15009 case R_PPC64_GOT_DTPREL16_HA:
15010 case R_PPC64_GOT16_HA:
15011 case R_PPC64_TOC16_HA:
15012 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
15013 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
15014 {
15015 bfd_byte *p = contents + (rel->r_offset & ~3);
15016 bfd_put_32 (input_bfd, NOP, p);
15017 }
15018 break;
15019
15020 case R_PPC64_GOT_TLSLD16_LO:
15021 case R_PPC64_GOT_TLSGD16_LO:
15022 case R_PPC64_GOT_TPREL16_LO_DS:
15023 case R_PPC64_GOT_DTPREL16_LO_DS:
15024 case R_PPC64_GOT16_LO:
15025 case R_PPC64_GOT16_LO_DS:
15026 case R_PPC64_TOC16_LO:
15027 case R_PPC64_TOC16_LO_DS:
15028 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
15029 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
15030 {
15031 bfd_byte *p = contents + (rel->r_offset & ~3);
15032 insn = bfd_get_32 (input_bfd, p);
15033 if ((insn & (0x3f << 26)) == 12u << 26 /* addic */)
15034 {
15035 /* Transform addic to addi when we change reg. */
15036 insn &= ~((0x3f << 26) | (0x1f << 16));
15037 insn |= (14u << 26) | (2 << 16);
15038 }
15039 else
15040 {
15041 insn &= ~(0x1f << 16);
15042 insn |= 2 << 16;
15043 }
15044 bfd_put_32 (input_bfd, insn, p);
15045 }
15046 break;
15047 }
15048
15049 /* Do any further special processing. */
15050 howto = ppc64_elf_howto_table[(int) r_type];
15051 switch (r_type)
15052 {
15053 default:
15054 break;
15055
15056 case R_PPC64_REL16_HA:
15057 case R_PPC64_REL16DX_HA:
15058 case R_PPC64_ADDR16_HA:
15059 case R_PPC64_ADDR16_HIGHA:
15060 case R_PPC64_ADDR16_HIGHERA:
15061 case R_PPC64_ADDR16_HIGHESTA:
15062 case R_PPC64_TOC16_HA:
15063 case R_PPC64_SECTOFF_HA:
15064 case R_PPC64_TPREL16_HA:
15065 case R_PPC64_TPREL16_HIGHA:
15066 case R_PPC64_TPREL16_HIGHERA:
15067 case R_PPC64_TPREL16_HIGHESTA:
15068 case R_PPC64_DTPREL16_HA:
15069 case R_PPC64_DTPREL16_HIGHA:
15070 case R_PPC64_DTPREL16_HIGHERA:
15071 case R_PPC64_DTPREL16_HIGHESTA:
15072 /* It's just possible that this symbol is a weak symbol
15073 that's not actually defined anywhere. In that case,
15074 'sec' would be NULL, and we should leave the symbol
15075 alone (it will be set to zero elsewhere in the link). */
15076 if (sec == NULL)
15077 break;
15078 /* Fall through. */
15079
15080 case R_PPC64_GOT16_HA:
15081 case R_PPC64_PLTGOT16_HA:
15082 case R_PPC64_PLT16_HA:
15083 case R_PPC64_GOT_TLSGD16_HA:
15084 case R_PPC64_GOT_TLSLD16_HA:
15085 case R_PPC64_GOT_TPREL16_HA:
15086 case R_PPC64_GOT_DTPREL16_HA:
15087 /* Add 0x10000 if sign bit in 0:15 is set.
15088 Bits 0:15 are not used. */
15089 addend += 0x8000;
15090 break;
15091
15092 case R_PPC64_ADDR16_DS:
15093 case R_PPC64_ADDR16_LO_DS:
15094 case R_PPC64_GOT16_DS:
15095 case R_PPC64_GOT16_LO_DS:
15096 case R_PPC64_PLT16_LO_DS:
15097 case R_PPC64_SECTOFF_DS:
15098 case R_PPC64_SECTOFF_LO_DS:
15099 case R_PPC64_TOC16_DS:
15100 case R_PPC64_TOC16_LO_DS:
15101 case R_PPC64_PLTGOT16_DS:
15102 case R_PPC64_PLTGOT16_LO_DS:
15103 case R_PPC64_GOT_TPREL16_DS:
15104 case R_PPC64_GOT_TPREL16_LO_DS:
15105 case R_PPC64_GOT_DTPREL16_DS:
15106 case R_PPC64_GOT_DTPREL16_LO_DS:
15107 case R_PPC64_TPREL16_DS:
15108 case R_PPC64_TPREL16_LO_DS:
15109 case R_PPC64_DTPREL16_DS:
15110 case R_PPC64_DTPREL16_LO_DS:
15111 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
15112 mask = 3;
15113 /* If this reloc is against an lq, lxv, or stxv insn, then
15114 the value must be a multiple of 16. This is somewhat of
15115 a hack, but the "correct" way to do this by defining _DQ
15116 forms of all the _DS relocs bloats all reloc switches in
15117 this file. It doesn't make much sense to use these
15118 relocs in data, so testing the insn should be safe. */
15119 if ((insn & (0x3f << 26)) == (56u << 26)
15120 || ((insn & (0x3f << 26)) == (61u << 26) && (insn & 3) == 1))
15121 mask = 15;
15122 relocation += addend;
15123 addend = insn & (mask ^ 3);
15124 if ((relocation & mask) != 0)
15125 {
15126 relocation ^= relocation & mask;
15127 info->callbacks->einfo
15128 (_("%P: %H: error: %s not a multiple of %u\n"),
15129 input_bfd, input_section, rel->r_offset,
15130 howto->name,
15131 mask + 1);
15132 bfd_set_error (bfd_error_bad_value);
15133 ret = FALSE;
15134 goto copy_reloc;
15135 }
15136 break;
15137 }
15138
15139 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
15140 because such sections are not SEC_ALLOC and thus ld.so will
15141 not process them. */
15142 if (unresolved_reloc
15143 && !((input_section->flags & SEC_DEBUGGING) != 0
15144 && h->elf.def_dynamic)
15145 && _bfd_elf_section_offset (output_bfd, info, input_section,
15146 rel->r_offset) != (bfd_vma) -1)
15147 {
15148 info->callbacks->einfo
15149 (_("%P: %H: unresolvable %s against `%T'\n"),
15150 input_bfd, input_section, rel->r_offset,
15151 howto->name,
15152 h->elf.root.root.string);
15153 ret = FALSE;
15154 }
15155
15156 /* 16-bit fields in insns mostly have signed values, but a
15157 few insns have 16-bit unsigned values. Really, we should
15158 have different reloc types. */
15159 if (howto->complain_on_overflow != complain_overflow_dont
15160 && howto->dst_mask == 0xffff
15161 && (input_section->flags & SEC_CODE) != 0)
15162 {
15163 enum complain_overflow complain = complain_overflow_signed;
15164
15165 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
15166 if ((insn & (0x3f << 26)) == 10u << 26 /* cmpli */)
15167 complain = complain_overflow_bitfield;
15168 else if (howto->rightshift == 0
15169 ? ((insn & (0x3f << 26)) == 28u << 26 /* andi */
15170 || (insn & (0x3f << 26)) == 24u << 26 /* ori */
15171 || (insn & (0x3f << 26)) == 26u << 26 /* xori */)
15172 : ((insn & (0x3f << 26)) == 29u << 26 /* andis */
15173 || (insn & (0x3f << 26)) == 25u << 26 /* oris */
15174 || (insn & (0x3f << 26)) == 27u << 26 /* xoris */))
15175 complain = complain_overflow_unsigned;
15176 if (howto->complain_on_overflow != complain)
15177 {
15178 alt_howto = *howto;
15179 alt_howto.complain_on_overflow = complain;
15180 howto = &alt_howto;
15181 }
15182 }
15183
15184 if (r_type == R_PPC64_REL16DX_HA)
15185 {
15186 /* Split field reloc isn't handled by _bfd_final_link_relocate. */
15187 if (rel->r_offset + 4 > input_section->size)
15188 r = bfd_reloc_outofrange;
15189 else
15190 {
15191 relocation += addend;
15192 relocation -= (rel->r_offset
15193 + input_section->output_offset
15194 + input_section->output_section->vma);
15195 relocation = (bfd_signed_vma) relocation >> 16;
15196 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
15197 insn &= ~0x1fffc1;
15198 insn |= (relocation & 0xffc1) | ((relocation & 0x3e) << 15);
15199 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
15200 r = bfd_reloc_ok;
15201 if (relocation + 0x8000 > 0xffff)
15202 r = bfd_reloc_overflow;
15203 }
15204 }
15205 else
15206 r = _bfd_final_link_relocate (howto, input_bfd, input_section, contents,
15207 rel->r_offset, relocation, addend);
15208
15209 if (r != bfd_reloc_ok)
15210 {
15211 char *more_info = NULL;
15212 const char *reloc_name = howto->name;
15213
15214 if (reloc_dest != DEST_NORMAL)
15215 {
15216 more_info = bfd_malloc (strlen (reloc_name) + 8);
15217 if (more_info != NULL)
15218 {
15219 strcpy (more_info, reloc_name);
15220 strcat (more_info, (reloc_dest == DEST_OPD
15221 ? " (OPD)" : " (stub)"));
15222 reloc_name = more_info;
15223 }
15224 }
15225
15226 if (r == bfd_reloc_overflow)
15227 {
15228 /* On code like "if (foo) foo();" don't report overflow
15229 on a branch to zero when foo is undefined. */
15230 if (!warned
15231 && (reloc_dest == DEST_STUB
15232 || !(h != NULL
15233 && (h->elf.root.type == bfd_link_hash_undefweak
15234 || h->elf.root.type == bfd_link_hash_undefined)
15235 && is_branch_reloc (r_type))))
15236 info->callbacks->reloc_overflow (info, &h->elf.root,
15237 sym_name, reloc_name,
15238 orig_rel.r_addend,
15239 input_bfd, input_section,
15240 rel->r_offset);
15241 }
15242 else
15243 {
15244 info->callbacks->einfo
15245 (_("%P: %H: %s against `%T': error %d\n"),
15246 input_bfd, input_section, rel->r_offset,
15247 reloc_name, sym_name, (int) r);
15248 ret = FALSE;
15249 }
15250 if (more_info != NULL)
15251 free (more_info);
15252 }
15253 copy_reloc:
15254 if (wrel != rel)
15255 *wrel = *rel;
15256 }
15257
15258 if (wrel != rel)
15259 {
15260 Elf_Internal_Shdr *rel_hdr;
15261 size_t deleted = rel - wrel;
15262
15263 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
15264 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
15265 if (rel_hdr->sh_size == 0)
15266 {
15267 /* It is too late to remove an empty reloc section. Leave
15268 one NONE reloc.
15269 ??? What is wrong with an empty section??? */
15270 rel_hdr->sh_size = rel_hdr->sh_entsize;
15271 deleted -= 1;
15272 }
15273 rel_hdr = _bfd_elf_single_rel_hdr (input_section);
15274 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
15275 input_section->reloc_count -= deleted;
15276 }
15277
15278 /* If we're emitting relocations, then shortly after this function
15279 returns, reloc offsets and addends for this section will be
15280 adjusted. Worse, reloc symbol indices will be for the output
15281 file rather than the input. Save a copy of the relocs for
15282 opd_entry_value. */
15283 if (is_opd && (info->emitrelocations || bfd_link_relocatable (info)))
15284 {
15285 bfd_size_type amt;
15286 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
15287 rel = bfd_alloc (input_bfd, amt);
15288 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd.relocs == NULL);
15289 ppc64_elf_tdata (input_bfd)->opd.relocs = rel;
15290 if (rel == NULL)
15291 return FALSE;
15292 memcpy (rel, relocs, amt);
15293 }
15294 return ret;
15295 }
15296
15297 /* Adjust the value of any local symbols in opd sections. */
15298
15299 static int
15300 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
15301 const char *name ATTRIBUTE_UNUSED,
15302 Elf_Internal_Sym *elfsym,
15303 asection *input_sec,
15304 struct elf_link_hash_entry *h)
15305 {
15306 struct _opd_sec_data *opd;
15307 long adjust;
15308 bfd_vma value;
15309
15310 if (h != NULL)
15311 return 1;
15312
15313 opd = get_opd_info (input_sec);
15314 if (opd == NULL || opd->adjust == NULL)
15315 return 1;
15316
15317 value = elfsym->st_value - input_sec->output_offset;
15318 if (!bfd_link_relocatable (info))
15319 value -= input_sec->output_section->vma;
15320
15321 adjust = opd->adjust[OPD_NDX (value)];
15322 if (adjust == -1)
15323 return 2;
15324
15325 elfsym->st_value += adjust;
15326 return 1;
15327 }
15328
15329 /* Finish up dynamic symbol handling. We set the contents of various
15330 dynamic sections here. */
15331
15332 static bfd_boolean
15333 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
15334 struct bfd_link_info *info,
15335 struct elf_link_hash_entry *h,
15336 Elf_Internal_Sym *sym ATTRIBUTE_UNUSED)
15337 {
15338 struct ppc_link_hash_table *htab;
15339 struct plt_entry *ent;
15340 Elf_Internal_Rela rela;
15341 bfd_byte *loc;
15342
15343 htab = ppc_hash_table (info);
15344 if (htab == NULL)
15345 return FALSE;
15346
15347 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
15348 if (ent->plt.offset != (bfd_vma) -1)
15349 {
15350 /* This symbol has an entry in the procedure linkage
15351 table. Set it up. */
15352 if (!htab->elf.dynamic_sections_created
15353 || h->dynindx == -1)
15354 {
15355 BFD_ASSERT (h->type == STT_GNU_IFUNC
15356 && h->def_regular
15357 && (h->root.type == bfd_link_hash_defined
15358 || h->root.type == bfd_link_hash_defweak));
15359 rela.r_offset = (htab->elf.iplt->output_section->vma
15360 + htab->elf.iplt->output_offset
15361 + ent->plt.offset);
15362 if (htab->opd_abi)
15363 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
15364 else
15365 rela.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
15366 rela.r_addend = (h->root.u.def.value
15367 + h->root.u.def.section->output_offset
15368 + h->root.u.def.section->output_section->vma
15369 + ent->addend);
15370 loc = (htab->elf.irelplt->contents
15371 + (htab->elf.irelplt->reloc_count++
15372 * sizeof (Elf64_External_Rela)));
15373 }
15374 else
15375 {
15376 rela.r_offset = (htab->elf.splt->output_section->vma
15377 + htab->elf.splt->output_offset
15378 + ent->plt.offset);
15379 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
15380 rela.r_addend = ent->addend;
15381 loc = (htab->elf.srelplt->contents
15382 + ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE (htab))
15383 / PLT_ENTRY_SIZE (htab) * sizeof (Elf64_External_Rela)));
15384 }
15385 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
15386
15387 if (!htab->opd_abi)
15388 {
15389 if (!h->def_regular)
15390 {
15391 /* Mark the symbol as undefined, rather than as
15392 defined in glink. Leave the value if there were
15393 any relocations where pointer equality matters
15394 (this is a clue for the dynamic linker, to make
15395 function pointer comparisons work between an
15396 application and shared library), otherwise set it
15397 to zero. */
15398 sym->st_shndx = SHN_UNDEF;
15399 if (!h->pointer_equality_needed)
15400 sym->st_value = 0;
15401 else if (!h->ref_regular_nonweak)
15402 {
15403 /* This breaks function pointer comparisons, but
15404 that is better than breaking tests for a NULL
15405 function pointer. */
15406 sym->st_value = 0;
15407 }
15408 }
15409 }
15410 }
15411
15412 if (h->needs_copy)
15413 {
15414 /* This symbol needs a copy reloc. Set it up. */
15415
15416 if (h->dynindx == -1
15417 || (h->root.type != bfd_link_hash_defined
15418 && h->root.type != bfd_link_hash_defweak)
15419 || htab->relbss == NULL)
15420 abort ();
15421
15422 rela.r_offset = (h->root.u.def.value
15423 + h->root.u.def.section->output_section->vma
15424 + h->root.u.def.section->output_offset);
15425 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
15426 rela.r_addend = 0;
15427 loc = htab->relbss->contents;
15428 loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela);
15429 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
15430 }
15431
15432 return TRUE;
15433 }
15434
15435 /* Used to decide how to sort relocs in an optimal manner for the
15436 dynamic linker, before writing them out. */
15437
15438 static enum elf_reloc_type_class
15439 ppc64_elf_reloc_type_class (const struct bfd_link_info *info,
15440 const asection *rel_sec,
15441 const Elf_Internal_Rela *rela)
15442 {
15443 enum elf_ppc64_reloc_type r_type;
15444 struct ppc_link_hash_table *htab = ppc_hash_table (info);
15445
15446 if (rel_sec == htab->elf.irelplt)
15447 return reloc_class_ifunc;
15448
15449 r_type = ELF64_R_TYPE (rela->r_info);
15450 switch (r_type)
15451 {
15452 case R_PPC64_RELATIVE:
15453 return reloc_class_relative;
15454 case R_PPC64_JMP_SLOT:
15455 return reloc_class_plt;
15456 case R_PPC64_COPY:
15457 return reloc_class_copy;
15458 default:
15459 return reloc_class_normal;
15460 }
15461 }
15462
15463 /* Finish up the dynamic sections. */
15464
15465 static bfd_boolean
15466 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
15467 struct bfd_link_info *info)
15468 {
15469 struct ppc_link_hash_table *htab;
15470 bfd *dynobj;
15471 asection *sdyn;
15472
15473 htab = ppc_hash_table (info);
15474 if (htab == NULL)
15475 return FALSE;
15476
15477 dynobj = htab->elf.dynobj;
15478 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
15479
15480 if (htab->elf.dynamic_sections_created)
15481 {
15482 Elf64_External_Dyn *dyncon, *dynconend;
15483
15484 if (sdyn == NULL || htab->elf.sgot == NULL)
15485 abort ();
15486
15487 dyncon = (Elf64_External_Dyn *) sdyn->contents;
15488 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
15489 for (; dyncon < dynconend; dyncon++)
15490 {
15491 Elf_Internal_Dyn dyn;
15492 asection *s;
15493
15494 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
15495
15496 switch (dyn.d_tag)
15497 {
15498 default:
15499 continue;
15500
15501 case DT_PPC64_GLINK:
15502 s = htab->glink;
15503 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15504 /* We stupidly defined DT_PPC64_GLINK to be the start
15505 of glink rather than the first entry point, which is
15506 what ld.so needs, and now have a bigger stub to
15507 support automatic multiple TOCs. */
15508 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 8 * 4;
15509 break;
15510
15511 case DT_PPC64_OPD:
15512 s = bfd_get_section_by_name (output_bfd, ".opd");
15513 if (s == NULL)
15514 continue;
15515 dyn.d_un.d_ptr = s->vma;
15516 break;
15517
15518 case DT_PPC64_OPT:
15519 if (htab->do_multi_toc && htab->multi_toc_needed)
15520 dyn.d_un.d_val |= PPC64_OPT_MULTI_TOC;
15521 break;
15522
15523 case DT_PPC64_OPDSZ:
15524 s = bfd_get_section_by_name (output_bfd, ".opd");
15525 if (s == NULL)
15526 continue;
15527 dyn.d_un.d_val = s->size;
15528 break;
15529
15530 case DT_PLTGOT:
15531 s = htab->elf.splt;
15532 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15533 break;
15534
15535 case DT_JMPREL:
15536 s = htab->elf.srelplt;
15537 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15538 break;
15539
15540 case DT_PLTRELSZ:
15541 dyn.d_un.d_val = htab->elf.srelplt->size;
15542 break;
15543
15544 case DT_RELASZ:
15545 /* Don't count procedure linkage table relocs in the
15546 overall reloc count. */
15547 s = htab->elf.srelplt;
15548 if (s == NULL)
15549 continue;
15550 dyn.d_un.d_val -= s->size;
15551 break;
15552
15553 case DT_RELA:
15554 /* We may not be using the standard ELF linker script.
15555 If .rela.plt is the first .rela section, we adjust
15556 DT_RELA to not include it. */
15557 s = htab->elf.srelplt;
15558 if (s == NULL)
15559 continue;
15560 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
15561 continue;
15562 dyn.d_un.d_ptr += s->size;
15563 break;
15564 }
15565
15566 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
15567 }
15568 }
15569
15570 if (htab->elf.sgot != NULL && htab->elf.sgot->size != 0)
15571 {
15572 /* Fill in the first entry in the global offset table.
15573 We use it to hold the link-time TOCbase. */
15574 bfd_put_64 (output_bfd,
15575 elf_gp (output_bfd) + TOC_BASE_OFF,
15576 htab->elf.sgot->contents);
15577
15578 /* Set .got entry size. */
15579 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 8;
15580 }
15581
15582 if (htab->elf.splt != NULL && htab->elf.splt->size != 0)
15583 {
15584 /* Set .plt entry size. */
15585 elf_section_data (htab->elf.splt->output_section)->this_hdr.sh_entsize
15586 = PLT_ENTRY_SIZE (htab);
15587 }
15588
15589 /* brlt is SEC_LINKER_CREATED, so we need to write out relocs for
15590 brlt ourselves if emitrelocations. */
15591 if (htab->brlt != NULL
15592 && htab->brlt->reloc_count != 0
15593 && !_bfd_elf_link_output_relocs (output_bfd,
15594 htab->brlt,
15595 elf_section_data (htab->brlt)->rela.hdr,
15596 elf_section_data (htab->brlt)->relocs,
15597 NULL))
15598 return FALSE;
15599
15600 if (htab->glink != NULL
15601 && htab->glink->reloc_count != 0
15602 && !_bfd_elf_link_output_relocs (output_bfd,
15603 htab->glink,
15604 elf_section_data (htab->glink)->rela.hdr,
15605 elf_section_data (htab->glink)->relocs,
15606 NULL))
15607 return FALSE;
15608
15609 if (htab->glink_eh_frame != NULL
15610 && htab->glink_eh_frame->size != 0)
15611 {
15612 bfd_vma val;
15613 bfd_byte *p;
15614 asection *stub_sec;
15615
15616 p = htab->glink_eh_frame->contents + sizeof (glink_eh_frame_cie);
15617 for (stub_sec = htab->params->stub_bfd->sections;
15618 stub_sec != NULL;
15619 stub_sec = stub_sec->next)
15620 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
15621 {
15622 /* FDE length. */
15623 p += 4;
15624 /* CIE pointer. */
15625 p += 4;
15626 /* Offset to stub section. */
15627 val = (stub_sec->output_section->vma
15628 + stub_sec->output_offset);
15629 val -= (htab->glink_eh_frame->output_section->vma
15630 + htab->glink_eh_frame->output_offset
15631 + (p - htab->glink_eh_frame->contents));
15632 if (val + 0x80000000 > 0xffffffff)
15633 {
15634 info->callbacks->einfo
15635 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
15636 stub_sec->name);
15637 return FALSE;
15638 }
15639 bfd_put_32 (dynobj, val, p);
15640 p += 4;
15641 /* stub section size. */
15642 p += 4;
15643 /* Augmentation. */
15644 p += 1;
15645 /* Pad. */
15646 p += 7;
15647 }
15648 if (htab->glink != NULL && htab->glink->size != 0)
15649 {
15650 /* FDE length. */
15651 p += 4;
15652 /* CIE pointer. */
15653 p += 4;
15654 /* Offset to .glink. */
15655 val = (htab->glink->output_section->vma
15656 + htab->glink->output_offset
15657 + 8);
15658 val -= (htab->glink_eh_frame->output_section->vma
15659 + htab->glink_eh_frame->output_offset
15660 + (p - htab->glink_eh_frame->contents));
15661 if (val + 0x80000000 > 0xffffffff)
15662 {
15663 info->callbacks->einfo
15664 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
15665 htab->glink->name);
15666 return FALSE;
15667 }
15668 bfd_put_32 (dynobj, val, p);
15669 p += 4;
15670 /* .glink size. */
15671 p += 4;
15672 /* Augmentation. */
15673 p += 1;
15674 /* Ops. */
15675 p += 7;
15676 }
15677
15678 if (htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME
15679 && !_bfd_elf_write_section_eh_frame (output_bfd, info,
15680 htab->glink_eh_frame,
15681 htab->glink_eh_frame->contents))
15682 return FALSE;
15683 }
15684
15685 /* We need to handle writing out multiple GOT sections ourselves,
15686 since we didn't add them to DYNOBJ. We know dynobj is the first
15687 bfd. */
15688 while ((dynobj = dynobj->link.next) != NULL)
15689 {
15690 asection *s;
15691
15692 if (!is_ppc64_elf (dynobj))
15693 continue;
15694
15695 s = ppc64_elf_tdata (dynobj)->got;
15696 if (s != NULL
15697 && s->size != 0
15698 && s->output_section != bfd_abs_section_ptr
15699 && !bfd_set_section_contents (output_bfd, s->output_section,
15700 s->contents, s->output_offset,
15701 s->size))
15702 return FALSE;
15703 s = ppc64_elf_tdata (dynobj)->relgot;
15704 if (s != NULL
15705 && s->size != 0
15706 && s->output_section != bfd_abs_section_ptr
15707 && !bfd_set_section_contents (output_bfd, s->output_section,
15708 s->contents, s->output_offset,
15709 s->size))
15710 return FALSE;
15711 }
15712
15713 return TRUE;
15714 }
15715
15716 #include "elf64-target.h"
15717
15718 /* FreeBSD support */
15719
15720 #undef TARGET_LITTLE_SYM
15721 #undef TARGET_LITTLE_NAME
15722
15723 #undef TARGET_BIG_SYM
15724 #define TARGET_BIG_SYM powerpc_elf64_fbsd_vec
15725 #undef TARGET_BIG_NAME
15726 #define TARGET_BIG_NAME "elf64-powerpc-freebsd"
15727
15728 #undef ELF_OSABI
15729 #define ELF_OSABI ELFOSABI_FREEBSD
15730
15731 #undef elf64_bed
15732 #define elf64_bed elf64_powerpc_fbsd_bed
15733
15734 #include "elf64-target.h"
15735
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