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* elf-m10300.c (_bfd_mn10300_elf_adjust_dynamic_symbol): Don't error
[binutils-gdb.git] / bfd / elf64-ppc.c
1 /* PowerPC64-specific support for 64-bit ELF.
2 Copyright 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008,
3 2009, 2010, 2011, 2012 Free Software Foundation, Inc.
4 Written by Linus Nordberg, Swox AB <info@swox.com>,
5 based on elf32-ppc.c by Ian Lance Taylor.
6 Largely rewritten by Alan Modra.
7
8 This file is part of BFD, the Binary File Descriptor library.
9
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 3 of the License, or
13 (at your option) any later version.
14
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
19
20 You should have received a copy of the GNU General Public License along
21 with this program; if not, write to the Free Software Foundation, Inc.,
22 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
23
24
25 /* The 64-bit PowerPC ELF ABI may be found at
26 http://www.linuxbase.org/spec/ELF/ppc64/PPC-elf64abi.txt, and
27 http://www.linuxbase.org/spec/ELF/ppc64/spec/book1.html */
28
29 #include "sysdep.h"
30 #include <stdarg.h>
31 #include "bfd.h"
32 #include "bfdlink.h"
33 #include "libbfd.h"
34 #include "elf-bfd.h"
35 #include "elf/ppc64.h"
36 #include "elf64-ppc.h"
37 #include "dwarf2.h"
38
39 static bfd_reloc_status_type ppc64_elf_ha_reloc
40 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
41 static bfd_reloc_status_type ppc64_elf_branch_reloc
42 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
43 static bfd_reloc_status_type ppc64_elf_brtaken_reloc
44 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
45 static bfd_reloc_status_type ppc64_elf_sectoff_reloc
46 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
47 static bfd_reloc_status_type ppc64_elf_sectoff_ha_reloc
48 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
49 static bfd_reloc_status_type ppc64_elf_toc_reloc
50 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
51 static bfd_reloc_status_type ppc64_elf_toc_ha_reloc
52 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
53 static bfd_reloc_status_type ppc64_elf_toc64_reloc
54 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
55 static bfd_reloc_status_type ppc64_elf_unhandled_reloc
56 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
57 static bfd_vma opd_entry_value
58 (asection *, bfd_vma, asection **, bfd_vma *);
59
60 #define TARGET_LITTLE_SYM bfd_elf64_powerpcle_vec
61 #define TARGET_LITTLE_NAME "elf64-powerpcle"
62 #define TARGET_BIG_SYM bfd_elf64_powerpc_vec
63 #define TARGET_BIG_NAME "elf64-powerpc"
64 #define ELF_ARCH bfd_arch_powerpc
65 #define ELF_TARGET_ID PPC64_ELF_DATA
66 #define ELF_MACHINE_CODE EM_PPC64
67 #define ELF_MAXPAGESIZE 0x10000
68 #define ELF_COMMONPAGESIZE 0x1000
69 #define elf_info_to_howto ppc64_elf_info_to_howto
70
71 #define elf_backend_want_got_sym 0
72 #define elf_backend_want_plt_sym 0
73 #define elf_backend_plt_alignment 3
74 #define elf_backend_plt_not_loaded 1
75 #define elf_backend_got_header_size 8
76 #define elf_backend_can_gc_sections 1
77 #define elf_backend_can_refcount 1
78 #define elf_backend_rela_normal 1
79 #define elf_backend_default_execstack 0
80
81 #define bfd_elf64_mkobject ppc64_elf_mkobject
82 #define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup
83 #define bfd_elf64_bfd_reloc_name_lookup ppc64_elf_reloc_name_lookup
84 #define bfd_elf64_bfd_merge_private_bfd_data _bfd_generic_verify_endian_match
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_bfd_link_hash_table_free ppc64_elf_link_hash_table_free
88 #define bfd_elf64_get_synthetic_symtab ppc64_elf_get_synthetic_symtab
89 #define bfd_elf64_bfd_link_just_syms ppc64_elf_link_just_syms
90
91 #define elf_backend_object_p ppc64_elf_object_p
92 #define elf_backend_grok_prstatus ppc64_elf_grok_prstatus
93 #define elf_backend_grok_psinfo ppc64_elf_grok_psinfo
94 #define elf_backend_write_core_note ppc64_elf_write_core_note
95 #define elf_backend_create_dynamic_sections ppc64_elf_create_dynamic_sections
96 #define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol
97 #define elf_backend_add_symbol_hook ppc64_elf_add_symbol_hook
98 #define elf_backend_check_directives ppc64_elf_process_dot_syms
99 #define elf_backend_as_needed_cleanup ppc64_elf_as_needed_cleanup
100 #define elf_backend_archive_symbol_lookup ppc64_elf_archive_symbol_lookup
101 #define elf_backend_check_relocs ppc64_elf_check_relocs
102 #define elf_backend_gc_keep ppc64_elf_gc_keep
103 #define elf_backend_gc_mark_dynamic_ref ppc64_elf_gc_mark_dynamic_ref
104 #define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook
105 #define elf_backend_gc_sweep_hook ppc64_elf_gc_sweep_hook
106 #define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol
107 #define elf_backend_hide_symbol ppc64_elf_hide_symbol
108 #define elf_backend_maybe_function_sym ppc64_elf_maybe_function_sym
109 #define elf_backend_always_size_sections ppc64_elf_func_desc_adjust
110 #define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections
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_post_process_headers _bfd_elf_set_osabi
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 24
127
128 /* The initial size of the plt reserved for the dynamic linker. */
129 #define PLT_INITIAL_ENTRY_SIZE PLT_ENTRY_SIZE
130
131 /* TOC base pointers offset from start of TOC. */
132 #define TOC_BASE_OFF 0x8000
133
134 /* Offset of tp and dtp pointers from start of TLS block. */
135 #define TP_OFFSET 0x7000
136 #define DTP_OFFSET 0x8000
137
138 /* .plt call stub instructions. The normal stub is like this, but
139 sometimes the .plt entry crosses a 64k boundary and we need to
140 insert an addi to adjust r12. */
141 #define PLT_CALL_STUB_SIZE (7*4)
142 #define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */
143 #define STD_R2_40R1 0xf8410028 /* std %r2,40(%r1) */
144 #define LD_R11_0R12 0xe96c0000 /* ld %r11,xxx+0@l(%r12) */
145 #define MTCTR_R11 0x7d6903a6 /* mtctr %r11 */
146 #define LD_R2_0R12 0xe84c0000 /* ld %r2,xxx+8@l(%r12) */
147 /* ld %r11,xxx+16@l(%r12) */
148 #define BCTR 0x4e800420 /* bctr */
149
150
151 #define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,off@ha */
152 #define ADDI_R12_R12 0x398c0000 /* addi %r12,%r12,off@l */
153 #define ADDIS_R2_R2 0x3c420000 /* addis %r2,%r2,off@ha */
154 #define ADDI_R2_R2 0x38420000 /* addi %r2,%r2,off@l */
155
156 #define XOR_R11_R11_R11 0x7d6b5a78 /* xor %r11,%r11,%r11 */
157 #define ADD_R12_R12_R11 0x7d8c5a14 /* add %r12,%r12,%r11 */
158 #define ADD_R2_R2_R11 0x7c425a14 /* add %r2,%r2,%r11 */
159 #define CMPLDI_R2_0 0x28220000 /* cmpldi %r2,0 */
160 #define BNECTR 0x4ca20420 /* bnectr+ */
161 #define BNECTR_P4 0x4ce20420 /* bnectr+ */
162
163 #define LD_R11_0R2 0xe9620000 /* ld %r11,xxx+0(%r2) */
164 #define LD_R2_0R2 0xe8420000 /* ld %r2,xxx+0(%r2) */
165
166 #define LD_R2_40R1 0xe8410028 /* ld %r2,40(%r1) */
167
168 /* glink call stub instructions. We enter with the index in R0. */
169 #define GLINK_CALL_STUB_SIZE (16*4)
170 /* 0: */
171 /* .quad plt0-1f */
172 /* __glink: */
173 #define MFLR_R12 0x7d8802a6 /* mflr %12 */
174 #define BCL_20_31 0x429f0005 /* bcl 20,31,1f */
175 /* 1: */
176 #define MFLR_R11 0x7d6802a6 /* mflr %11 */
177 #define LD_R2_M16R11 0xe84bfff0 /* ld %2,(0b-1b)(%11) */
178 #define MTLR_R12 0x7d8803a6 /* mtlr %12 */
179 #define ADD_R12_R2_R11 0x7d825a14 /* add %12,%2,%11 */
180 /* ld %11,0(%12) */
181 /* ld %2,8(%12) */
182 /* mtctr %11 */
183 /* ld %11,16(%12) */
184 /* bctr */
185
186 /* Pad with this. */
187 #define NOP 0x60000000
188
189 /* Some other nops. */
190 #define CROR_151515 0x4def7b82
191 #define CROR_313131 0x4ffffb82
192
193 /* .glink entries for the first 32k functions are two instructions. */
194 #define LI_R0_0 0x38000000 /* li %r0,0 */
195 #define B_DOT 0x48000000 /* b . */
196
197 /* After that, we need two instructions to load the index, followed by
198 a branch. */
199 #define LIS_R0_0 0x3c000000 /* lis %r0,0 */
200 #define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
201
202 /* Instructions used by the save and restore reg functions. */
203 #define STD_R0_0R1 0xf8010000 /* std %r0,0(%r1) */
204 #define STD_R0_0R12 0xf80c0000 /* std %r0,0(%r12) */
205 #define LD_R0_0R1 0xe8010000 /* ld %r0,0(%r1) */
206 #define LD_R0_0R12 0xe80c0000 /* ld %r0,0(%r12) */
207 #define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
208 #define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
209 #define LI_R12_0 0x39800000 /* li %r12,0 */
210 #define STVX_VR0_R12_R0 0x7c0c01ce /* stvx %v0,%r12,%r0 */
211 #define LVX_VR0_R12_R0 0x7c0c00ce /* lvx %v0,%r12,%r0 */
212 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
213 #define BLR 0x4e800020 /* blr */
214
215 /* Since .opd is an array of descriptors and each entry will end up
216 with identical R_PPC64_RELATIVE relocs, there is really no need to
217 propagate .opd relocs; The dynamic linker should be taught to
218 relocate .opd without reloc entries. */
219 #ifndef NO_OPD_RELOCS
220 #define NO_OPD_RELOCS 0
221 #endif
222 \f
223 #define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1)
224
225 /* Relocation HOWTO's. */
226 static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max];
227
228 static reloc_howto_type ppc64_elf_howto_raw[] = {
229 /* This reloc does nothing. */
230 HOWTO (R_PPC64_NONE, /* type */
231 0, /* rightshift */
232 2, /* size (0 = byte, 1 = short, 2 = long) */
233 32, /* bitsize */
234 FALSE, /* pc_relative */
235 0, /* bitpos */
236 complain_overflow_dont, /* complain_on_overflow */
237 bfd_elf_generic_reloc, /* special_function */
238 "R_PPC64_NONE", /* name */
239 FALSE, /* partial_inplace */
240 0, /* src_mask */
241 0, /* dst_mask */
242 FALSE), /* pcrel_offset */
243
244 /* A standard 32 bit relocation. */
245 HOWTO (R_PPC64_ADDR32, /* type */
246 0, /* rightshift */
247 2, /* size (0 = byte, 1 = short, 2 = long) */
248 32, /* bitsize */
249 FALSE, /* pc_relative */
250 0, /* bitpos */
251 complain_overflow_bitfield, /* complain_on_overflow */
252 bfd_elf_generic_reloc, /* special_function */
253 "R_PPC64_ADDR32", /* name */
254 FALSE, /* partial_inplace */
255 0, /* src_mask */
256 0xffffffff, /* dst_mask */
257 FALSE), /* pcrel_offset */
258
259 /* An absolute 26 bit branch; the lower two bits must be zero.
260 FIXME: we don't check that, we just clear them. */
261 HOWTO (R_PPC64_ADDR24, /* type */
262 0, /* rightshift */
263 2, /* size (0 = byte, 1 = short, 2 = long) */
264 26, /* bitsize */
265 FALSE, /* pc_relative */
266 0, /* bitpos */
267 complain_overflow_bitfield, /* complain_on_overflow */
268 bfd_elf_generic_reloc, /* special_function */
269 "R_PPC64_ADDR24", /* name */
270 FALSE, /* partial_inplace */
271 0, /* src_mask */
272 0x03fffffc, /* dst_mask */
273 FALSE), /* pcrel_offset */
274
275 /* A standard 16 bit relocation. */
276 HOWTO (R_PPC64_ADDR16, /* type */
277 0, /* rightshift */
278 1, /* size (0 = byte, 1 = short, 2 = long) */
279 16, /* bitsize */
280 FALSE, /* pc_relative */
281 0, /* bitpos */
282 complain_overflow_bitfield, /* complain_on_overflow */
283 bfd_elf_generic_reloc, /* special_function */
284 "R_PPC64_ADDR16", /* name */
285 FALSE, /* partial_inplace */
286 0, /* src_mask */
287 0xffff, /* dst_mask */
288 FALSE), /* pcrel_offset */
289
290 /* A 16 bit relocation without overflow. */
291 HOWTO (R_PPC64_ADDR16_LO, /* type */
292 0, /* rightshift */
293 1, /* size (0 = byte, 1 = short, 2 = long) */
294 16, /* bitsize */
295 FALSE, /* pc_relative */
296 0, /* bitpos */
297 complain_overflow_dont,/* complain_on_overflow */
298 bfd_elf_generic_reloc, /* special_function */
299 "R_PPC64_ADDR16_LO", /* name */
300 FALSE, /* partial_inplace */
301 0, /* src_mask */
302 0xffff, /* dst_mask */
303 FALSE), /* pcrel_offset */
304
305 /* Bits 16-31 of an address. */
306 HOWTO (R_PPC64_ADDR16_HI, /* type */
307 16, /* rightshift */
308 1, /* size (0 = byte, 1 = short, 2 = long) */
309 16, /* bitsize */
310 FALSE, /* pc_relative */
311 0, /* bitpos */
312 complain_overflow_dont, /* complain_on_overflow */
313 bfd_elf_generic_reloc, /* special_function */
314 "R_PPC64_ADDR16_HI", /* name */
315 FALSE, /* partial_inplace */
316 0, /* src_mask */
317 0xffff, /* dst_mask */
318 FALSE), /* pcrel_offset */
319
320 /* Bits 16-31 of an address, plus 1 if the contents of the low 16
321 bits, treated as a signed number, is negative. */
322 HOWTO (R_PPC64_ADDR16_HA, /* type */
323 16, /* rightshift */
324 1, /* size (0 = byte, 1 = short, 2 = long) */
325 16, /* bitsize */
326 FALSE, /* pc_relative */
327 0, /* bitpos */
328 complain_overflow_dont, /* complain_on_overflow */
329 ppc64_elf_ha_reloc, /* special_function */
330 "R_PPC64_ADDR16_HA", /* name */
331 FALSE, /* partial_inplace */
332 0, /* src_mask */
333 0xffff, /* dst_mask */
334 FALSE), /* pcrel_offset */
335
336 /* An absolute 16 bit branch; the lower two bits must be zero.
337 FIXME: we don't check that, we just clear them. */
338 HOWTO (R_PPC64_ADDR14, /* type */
339 0, /* rightshift */
340 2, /* size (0 = byte, 1 = short, 2 = long) */
341 16, /* bitsize */
342 FALSE, /* pc_relative */
343 0, /* bitpos */
344 complain_overflow_bitfield, /* complain_on_overflow */
345 ppc64_elf_branch_reloc, /* special_function */
346 "R_PPC64_ADDR14", /* name */
347 FALSE, /* partial_inplace */
348 0, /* src_mask */
349 0x0000fffc, /* dst_mask */
350 FALSE), /* pcrel_offset */
351
352 /* An absolute 16 bit branch, for which bit 10 should be set to
353 indicate that the branch is expected to be taken. The lower two
354 bits must be zero. */
355 HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */
356 0, /* rightshift */
357 2, /* size (0 = byte, 1 = short, 2 = long) */
358 16, /* bitsize */
359 FALSE, /* pc_relative */
360 0, /* bitpos */
361 complain_overflow_bitfield, /* complain_on_overflow */
362 ppc64_elf_brtaken_reloc, /* special_function */
363 "R_PPC64_ADDR14_BRTAKEN",/* name */
364 FALSE, /* partial_inplace */
365 0, /* src_mask */
366 0x0000fffc, /* dst_mask */
367 FALSE), /* pcrel_offset */
368
369 /* An absolute 16 bit branch, for which bit 10 should be set to
370 indicate that the branch is not expected to be taken. The lower
371 two bits must be zero. */
372 HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */
373 0, /* rightshift */
374 2, /* size (0 = byte, 1 = short, 2 = long) */
375 16, /* bitsize */
376 FALSE, /* pc_relative */
377 0, /* bitpos */
378 complain_overflow_bitfield, /* complain_on_overflow */
379 ppc64_elf_brtaken_reloc, /* special_function */
380 "R_PPC64_ADDR14_BRNTAKEN",/* name */
381 FALSE, /* partial_inplace */
382 0, /* src_mask */
383 0x0000fffc, /* dst_mask */
384 FALSE), /* pcrel_offset */
385
386 /* A relative 26 bit branch; the lower two bits must be zero. */
387 HOWTO (R_PPC64_REL24, /* type */
388 0, /* rightshift */
389 2, /* size (0 = byte, 1 = short, 2 = long) */
390 26, /* bitsize */
391 TRUE, /* pc_relative */
392 0, /* bitpos */
393 complain_overflow_signed, /* complain_on_overflow */
394 ppc64_elf_branch_reloc, /* special_function */
395 "R_PPC64_REL24", /* name */
396 FALSE, /* partial_inplace */
397 0, /* src_mask */
398 0x03fffffc, /* dst_mask */
399 TRUE), /* pcrel_offset */
400
401 /* A relative 16 bit branch; the lower two bits must be zero. */
402 HOWTO (R_PPC64_REL14, /* type */
403 0, /* rightshift */
404 2, /* size (0 = byte, 1 = short, 2 = long) */
405 16, /* bitsize */
406 TRUE, /* pc_relative */
407 0, /* bitpos */
408 complain_overflow_signed, /* complain_on_overflow */
409 ppc64_elf_branch_reloc, /* special_function */
410 "R_PPC64_REL14", /* name */
411 FALSE, /* partial_inplace */
412 0, /* src_mask */
413 0x0000fffc, /* dst_mask */
414 TRUE), /* pcrel_offset */
415
416 /* A relative 16 bit branch. Bit 10 should be set to indicate that
417 the branch is expected to be taken. The lower two bits must be
418 zero. */
419 HOWTO (R_PPC64_REL14_BRTAKEN, /* type */
420 0, /* rightshift */
421 2, /* size (0 = byte, 1 = short, 2 = long) */
422 16, /* bitsize */
423 TRUE, /* pc_relative */
424 0, /* bitpos */
425 complain_overflow_signed, /* complain_on_overflow */
426 ppc64_elf_brtaken_reloc, /* special_function */
427 "R_PPC64_REL14_BRTAKEN", /* name */
428 FALSE, /* partial_inplace */
429 0, /* src_mask */
430 0x0000fffc, /* dst_mask */
431 TRUE), /* pcrel_offset */
432
433 /* A relative 16 bit branch. Bit 10 should be set to indicate that
434 the branch is not expected to be taken. The lower two bits must
435 be zero. */
436 HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */
437 0, /* rightshift */
438 2, /* size (0 = byte, 1 = short, 2 = long) */
439 16, /* bitsize */
440 TRUE, /* pc_relative */
441 0, /* bitpos */
442 complain_overflow_signed, /* complain_on_overflow */
443 ppc64_elf_brtaken_reloc, /* special_function */
444 "R_PPC64_REL14_BRNTAKEN",/* name */
445 FALSE, /* partial_inplace */
446 0, /* src_mask */
447 0x0000fffc, /* dst_mask */
448 TRUE), /* pcrel_offset */
449
450 /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
451 symbol. */
452 HOWTO (R_PPC64_GOT16, /* type */
453 0, /* rightshift */
454 1, /* size (0 = byte, 1 = short, 2 = long) */
455 16, /* bitsize */
456 FALSE, /* pc_relative */
457 0, /* bitpos */
458 complain_overflow_signed, /* complain_on_overflow */
459 ppc64_elf_unhandled_reloc, /* special_function */
460 "R_PPC64_GOT16", /* name */
461 FALSE, /* partial_inplace */
462 0, /* src_mask */
463 0xffff, /* dst_mask */
464 FALSE), /* pcrel_offset */
465
466 /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
467 the symbol. */
468 HOWTO (R_PPC64_GOT16_LO, /* type */
469 0, /* rightshift */
470 1, /* size (0 = byte, 1 = short, 2 = long) */
471 16, /* bitsize */
472 FALSE, /* pc_relative */
473 0, /* bitpos */
474 complain_overflow_dont, /* complain_on_overflow */
475 ppc64_elf_unhandled_reloc, /* special_function */
476 "R_PPC64_GOT16_LO", /* name */
477 FALSE, /* partial_inplace */
478 0, /* src_mask */
479 0xffff, /* dst_mask */
480 FALSE), /* pcrel_offset */
481
482 /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
483 the symbol. */
484 HOWTO (R_PPC64_GOT16_HI, /* type */
485 16, /* rightshift */
486 1, /* size (0 = byte, 1 = short, 2 = long) */
487 16, /* bitsize */
488 FALSE, /* pc_relative */
489 0, /* bitpos */
490 complain_overflow_dont,/* complain_on_overflow */
491 ppc64_elf_unhandled_reloc, /* special_function */
492 "R_PPC64_GOT16_HI", /* name */
493 FALSE, /* partial_inplace */
494 0, /* src_mask */
495 0xffff, /* dst_mask */
496 FALSE), /* pcrel_offset */
497
498 /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
499 the symbol. */
500 HOWTO (R_PPC64_GOT16_HA, /* type */
501 16, /* rightshift */
502 1, /* size (0 = byte, 1 = short, 2 = long) */
503 16, /* bitsize */
504 FALSE, /* pc_relative */
505 0, /* bitpos */
506 complain_overflow_dont,/* complain_on_overflow */
507 ppc64_elf_unhandled_reloc, /* special_function */
508 "R_PPC64_GOT16_HA", /* name */
509 FALSE, /* partial_inplace */
510 0, /* src_mask */
511 0xffff, /* dst_mask */
512 FALSE), /* pcrel_offset */
513
514 /* This is used only by the dynamic linker. The symbol should exist
515 both in the object being run and in some shared library. The
516 dynamic linker copies the data addressed by the symbol from the
517 shared library into the object, because the object being
518 run has to have the data at some particular address. */
519 HOWTO (R_PPC64_COPY, /* type */
520 0, /* rightshift */
521 0, /* this one is variable size */
522 0, /* bitsize */
523 FALSE, /* pc_relative */
524 0, /* bitpos */
525 complain_overflow_dont, /* complain_on_overflow */
526 ppc64_elf_unhandled_reloc, /* special_function */
527 "R_PPC64_COPY", /* name */
528 FALSE, /* partial_inplace */
529 0, /* src_mask */
530 0, /* dst_mask */
531 FALSE), /* pcrel_offset */
532
533 /* Like R_PPC64_ADDR64, but used when setting global offset table
534 entries. */
535 HOWTO (R_PPC64_GLOB_DAT, /* type */
536 0, /* rightshift */
537 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
538 64, /* bitsize */
539 FALSE, /* pc_relative */
540 0, /* bitpos */
541 complain_overflow_dont, /* complain_on_overflow */
542 ppc64_elf_unhandled_reloc, /* special_function */
543 "R_PPC64_GLOB_DAT", /* name */
544 FALSE, /* partial_inplace */
545 0, /* src_mask */
546 ONES (64), /* dst_mask */
547 FALSE), /* pcrel_offset */
548
549 /* Created by the link editor. Marks a procedure linkage table
550 entry for a symbol. */
551 HOWTO (R_PPC64_JMP_SLOT, /* type */
552 0, /* rightshift */
553 0, /* size (0 = byte, 1 = short, 2 = long) */
554 0, /* bitsize */
555 FALSE, /* pc_relative */
556 0, /* bitpos */
557 complain_overflow_dont, /* complain_on_overflow */
558 ppc64_elf_unhandled_reloc, /* special_function */
559 "R_PPC64_JMP_SLOT", /* name */
560 FALSE, /* partial_inplace */
561 0, /* src_mask */
562 0, /* dst_mask */
563 FALSE), /* pcrel_offset */
564
565 /* Used only by the dynamic linker. When the object is run, this
566 doubleword64 is set to the load address of the object, plus the
567 addend. */
568 HOWTO (R_PPC64_RELATIVE, /* type */
569 0, /* rightshift */
570 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
571 64, /* bitsize */
572 FALSE, /* pc_relative */
573 0, /* bitpos */
574 complain_overflow_dont, /* complain_on_overflow */
575 bfd_elf_generic_reloc, /* special_function */
576 "R_PPC64_RELATIVE", /* name */
577 FALSE, /* partial_inplace */
578 0, /* src_mask */
579 ONES (64), /* dst_mask */
580 FALSE), /* pcrel_offset */
581
582 /* Like R_PPC64_ADDR32, but may be unaligned. */
583 HOWTO (R_PPC64_UADDR32, /* type */
584 0, /* rightshift */
585 2, /* size (0 = byte, 1 = short, 2 = long) */
586 32, /* bitsize */
587 FALSE, /* pc_relative */
588 0, /* bitpos */
589 complain_overflow_bitfield, /* complain_on_overflow */
590 bfd_elf_generic_reloc, /* special_function */
591 "R_PPC64_UADDR32", /* name */
592 FALSE, /* partial_inplace */
593 0, /* src_mask */
594 0xffffffff, /* dst_mask */
595 FALSE), /* pcrel_offset */
596
597 /* Like R_PPC64_ADDR16, but may be unaligned. */
598 HOWTO (R_PPC64_UADDR16, /* type */
599 0, /* rightshift */
600 1, /* size (0 = byte, 1 = short, 2 = long) */
601 16, /* bitsize */
602 FALSE, /* pc_relative */
603 0, /* bitpos */
604 complain_overflow_bitfield, /* complain_on_overflow */
605 bfd_elf_generic_reloc, /* special_function */
606 "R_PPC64_UADDR16", /* name */
607 FALSE, /* partial_inplace */
608 0, /* src_mask */
609 0xffff, /* dst_mask */
610 FALSE), /* pcrel_offset */
611
612 /* 32-bit PC relative. */
613 HOWTO (R_PPC64_REL32, /* type */
614 0, /* rightshift */
615 2, /* size (0 = byte, 1 = short, 2 = long) */
616 32, /* bitsize */
617 TRUE, /* pc_relative */
618 0, /* bitpos */
619 /* FIXME: Verify. Was complain_overflow_bitfield. */
620 complain_overflow_signed, /* complain_on_overflow */
621 bfd_elf_generic_reloc, /* special_function */
622 "R_PPC64_REL32", /* name */
623 FALSE, /* partial_inplace */
624 0, /* src_mask */
625 0xffffffff, /* dst_mask */
626 TRUE), /* pcrel_offset */
627
628 /* 32-bit relocation to the symbol's procedure linkage table. */
629 HOWTO (R_PPC64_PLT32, /* type */
630 0, /* rightshift */
631 2, /* size (0 = byte, 1 = short, 2 = long) */
632 32, /* bitsize */
633 FALSE, /* pc_relative */
634 0, /* bitpos */
635 complain_overflow_bitfield, /* complain_on_overflow */
636 ppc64_elf_unhandled_reloc, /* special_function */
637 "R_PPC64_PLT32", /* name */
638 FALSE, /* partial_inplace */
639 0, /* src_mask */
640 0xffffffff, /* dst_mask */
641 FALSE), /* pcrel_offset */
642
643 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
644 FIXME: R_PPC64_PLTREL32 not supported. */
645 HOWTO (R_PPC64_PLTREL32, /* type */
646 0, /* rightshift */
647 2, /* size (0 = byte, 1 = short, 2 = long) */
648 32, /* bitsize */
649 TRUE, /* pc_relative */
650 0, /* bitpos */
651 complain_overflow_signed, /* complain_on_overflow */
652 bfd_elf_generic_reloc, /* special_function */
653 "R_PPC64_PLTREL32", /* name */
654 FALSE, /* partial_inplace */
655 0, /* src_mask */
656 0xffffffff, /* dst_mask */
657 TRUE), /* pcrel_offset */
658
659 /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
660 the symbol. */
661 HOWTO (R_PPC64_PLT16_LO, /* type */
662 0, /* rightshift */
663 1, /* size (0 = byte, 1 = short, 2 = long) */
664 16, /* bitsize */
665 FALSE, /* pc_relative */
666 0, /* bitpos */
667 complain_overflow_dont, /* complain_on_overflow */
668 ppc64_elf_unhandled_reloc, /* special_function */
669 "R_PPC64_PLT16_LO", /* name */
670 FALSE, /* partial_inplace */
671 0, /* src_mask */
672 0xffff, /* dst_mask */
673 FALSE), /* pcrel_offset */
674
675 /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
676 the symbol. */
677 HOWTO (R_PPC64_PLT16_HI, /* type */
678 16, /* rightshift */
679 1, /* size (0 = byte, 1 = short, 2 = long) */
680 16, /* bitsize */
681 FALSE, /* pc_relative */
682 0, /* bitpos */
683 complain_overflow_dont, /* complain_on_overflow */
684 ppc64_elf_unhandled_reloc, /* special_function */
685 "R_PPC64_PLT16_HI", /* name */
686 FALSE, /* partial_inplace */
687 0, /* src_mask */
688 0xffff, /* dst_mask */
689 FALSE), /* pcrel_offset */
690
691 /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
692 the symbol. */
693 HOWTO (R_PPC64_PLT16_HA, /* type */
694 16, /* rightshift */
695 1, /* size (0 = byte, 1 = short, 2 = long) */
696 16, /* bitsize */
697 FALSE, /* pc_relative */
698 0, /* bitpos */
699 complain_overflow_dont, /* complain_on_overflow */
700 ppc64_elf_unhandled_reloc, /* special_function */
701 "R_PPC64_PLT16_HA", /* name */
702 FALSE, /* partial_inplace */
703 0, /* src_mask */
704 0xffff, /* dst_mask */
705 FALSE), /* pcrel_offset */
706
707 /* 16-bit section relative relocation. */
708 HOWTO (R_PPC64_SECTOFF, /* type */
709 0, /* rightshift */
710 1, /* size (0 = byte, 1 = short, 2 = long) */
711 16, /* bitsize */
712 FALSE, /* pc_relative */
713 0, /* bitpos */
714 complain_overflow_bitfield, /* complain_on_overflow */
715 ppc64_elf_sectoff_reloc, /* special_function */
716 "R_PPC64_SECTOFF", /* name */
717 FALSE, /* partial_inplace */
718 0, /* src_mask */
719 0xffff, /* dst_mask */
720 FALSE), /* pcrel_offset */
721
722 /* Like R_PPC64_SECTOFF, but no overflow warning. */
723 HOWTO (R_PPC64_SECTOFF_LO, /* type */
724 0, /* rightshift */
725 1, /* size (0 = byte, 1 = short, 2 = long) */
726 16, /* bitsize */
727 FALSE, /* pc_relative */
728 0, /* bitpos */
729 complain_overflow_dont, /* complain_on_overflow */
730 ppc64_elf_sectoff_reloc, /* special_function */
731 "R_PPC64_SECTOFF_LO", /* name */
732 FALSE, /* partial_inplace */
733 0, /* src_mask */
734 0xffff, /* dst_mask */
735 FALSE), /* pcrel_offset */
736
737 /* 16-bit upper half section relative relocation. */
738 HOWTO (R_PPC64_SECTOFF_HI, /* type */
739 16, /* rightshift */
740 1, /* size (0 = byte, 1 = short, 2 = long) */
741 16, /* bitsize */
742 FALSE, /* pc_relative */
743 0, /* bitpos */
744 complain_overflow_dont, /* complain_on_overflow */
745 ppc64_elf_sectoff_reloc, /* special_function */
746 "R_PPC64_SECTOFF_HI", /* name */
747 FALSE, /* partial_inplace */
748 0, /* src_mask */
749 0xffff, /* dst_mask */
750 FALSE), /* pcrel_offset */
751
752 /* 16-bit upper half adjusted section relative relocation. */
753 HOWTO (R_PPC64_SECTOFF_HA, /* type */
754 16, /* rightshift */
755 1, /* size (0 = byte, 1 = short, 2 = long) */
756 16, /* bitsize */
757 FALSE, /* pc_relative */
758 0, /* bitpos */
759 complain_overflow_dont, /* complain_on_overflow */
760 ppc64_elf_sectoff_ha_reloc, /* special_function */
761 "R_PPC64_SECTOFF_HA", /* name */
762 FALSE, /* partial_inplace */
763 0, /* src_mask */
764 0xffff, /* dst_mask */
765 FALSE), /* pcrel_offset */
766
767 /* Like R_PPC64_REL24 without touching the two least significant bits. */
768 HOWTO (R_PPC64_REL30, /* type */
769 2, /* rightshift */
770 2, /* size (0 = byte, 1 = short, 2 = long) */
771 30, /* bitsize */
772 TRUE, /* pc_relative */
773 0, /* bitpos */
774 complain_overflow_dont, /* complain_on_overflow */
775 bfd_elf_generic_reloc, /* special_function */
776 "R_PPC64_REL30", /* name */
777 FALSE, /* partial_inplace */
778 0, /* src_mask */
779 0xfffffffc, /* dst_mask */
780 TRUE), /* pcrel_offset */
781
782 /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
783
784 /* A standard 64-bit relocation. */
785 HOWTO (R_PPC64_ADDR64, /* type */
786 0, /* rightshift */
787 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
788 64, /* bitsize */
789 FALSE, /* pc_relative */
790 0, /* bitpos */
791 complain_overflow_dont, /* complain_on_overflow */
792 bfd_elf_generic_reloc, /* special_function */
793 "R_PPC64_ADDR64", /* name */
794 FALSE, /* partial_inplace */
795 0, /* src_mask */
796 ONES (64), /* dst_mask */
797 FALSE), /* pcrel_offset */
798
799 /* The bits 32-47 of an address. */
800 HOWTO (R_PPC64_ADDR16_HIGHER, /* type */
801 32, /* rightshift */
802 1, /* size (0 = byte, 1 = short, 2 = long) */
803 16, /* bitsize */
804 FALSE, /* pc_relative */
805 0, /* bitpos */
806 complain_overflow_dont, /* complain_on_overflow */
807 bfd_elf_generic_reloc, /* special_function */
808 "R_PPC64_ADDR16_HIGHER", /* name */
809 FALSE, /* partial_inplace */
810 0, /* src_mask */
811 0xffff, /* dst_mask */
812 FALSE), /* pcrel_offset */
813
814 /* The bits 32-47 of an address, plus 1 if the contents of the low
815 16 bits, treated as a signed number, is negative. */
816 HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */
817 32, /* rightshift */
818 1, /* size (0 = byte, 1 = short, 2 = long) */
819 16, /* bitsize */
820 FALSE, /* pc_relative */
821 0, /* bitpos */
822 complain_overflow_dont, /* complain_on_overflow */
823 ppc64_elf_ha_reloc, /* special_function */
824 "R_PPC64_ADDR16_HIGHERA", /* name */
825 FALSE, /* partial_inplace */
826 0, /* src_mask */
827 0xffff, /* dst_mask */
828 FALSE), /* pcrel_offset */
829
830 /* The bits 48-63 of an address. */
831 HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */
832 48, /* rightshift */
833 1, /* size (0 = byte, 1 = short, 2 = long) */
834 16, /* bitsize */
835 FALSE, /* pc_relative */
836 0, /* bitpos */
837 complain_overflow_dont, /* complain_on_overflow */
838 bfd_elf_generic_reloc, /* special_function */
839 "R_PPC64_ADDR16_HIGHEST", /* name */
840 FALSE, /* partial_inplace */
841 0, /* src_mask */
842 0xffff, /* dst_mask */
843 FALSE), /* pcrel_offset */
844
845 /* The bits 48-63 of an address, plus 1 if the contents of the low
846 16 bits, treated as a signed number, is negative. */
847 HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */
848 48, /* rightshift */
849 1, /* size (0 = byte, 1 = short, 2 = long) */
850 16, /* bitsize */
851 FALSE, /* pc_relative */
852 0, /* bitpos */
853 complain_overflow_dont, /* complain_on_overflow */
854 ppc64_elf_ha_reloc, /* special_function */
855 "R_PPC64_ADDR16_HIGHESTA", /* name */
856 FALSE, /* partial_inplace */
857 0, /* src_mask */
858 0xffff, /* dst_mask */
859 FALSE), /* pcrel_offset */
860
861 /* Like ADDR64, but may be unaligned. */
862 HOWTO (R_PPC64_UADDR64, /* type */
863 0, /* rightshift */
864 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
865 64, /* bitsize */
866 FALSE, /* pc_relative */
867 0, /* bitpos */
868 complain_overflow_dont, /* complain_on_overflow */
869 bfd_elf_generic_reloc, /* special_function */
870 "R_PPC64_UADDR64", /* name */
871 FALSE, /* partial_inplace */
872 0, /* src_mask */
873 ONES (64), /* dst_mask */
874 FALSE), /* pcrel_offset */
875
876 /* 64-bit relative relocation. */
877 HOWTO (R_PPC64_REL64, /* type */
878 0, /* rightshift */
879 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
880 64, /* bitsize */
881 TRUE, /* pc_relative */
882 0, /* bitpos */
883 complain_overflow_dont, /* complain_on_overflow */
884 bfd_elf_generic_reloc, /* special_function */
885 "R_PPC64_REL64", /* name */
886 FALSE, /* partial_inplace */
887 0, /* src_mask */
888 ONES (64), /* dst_mask */
889 TRUE), /* pcrel_offset */
890
891 /* 64-bit relocation to the symbol's procedure linkage table. */
892 HOWTO (R_PPC64_PLT64, /* type */
893 0, /* rightshift */
894 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
895 64, /* bitsize */
896 FALSE, /* pc_relative */
897 0, /* bitpos */
898 complain_overflow_dont, /* complain_on_overflow */
899 ppc64_elf_unhandled_reloc, /* special_function */
900 "R_PPC64_PLT64", /* name */
901 FALSE, /* partial_inplace */
902 0, /* src_mask */
903 ONES (64), /* dst_mask */
904 FALSE), /* pcrel_offset */
905
906 /* 64-bit PC relative relocation to the symbol's procedure linkage
907 table. */
908 /* FIXME: R_PPC64_PLTREL64 not supported. */
909 HOWTO (R_PPC64_PLTREL64, /* type */
910 0, /* rightshift */
911 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
912 64, /* bitsize */
913 TRUE, /* pc_relative */
914 0, /* bitpos */
915 complain_overflow_dont, /* complain_on_overflow */
916 ppc64_elf_unhandled_reloc, /* special_function */
917 "R_PPC64_PLTREL64", /* name */
918 FALSE, /* partial_inplace */
919 0, /* src_mask */
920 ONES (64), /* dst_mask */
921 TRUE), /* pcrel_offset */
922
923 /* 16 bit TOC-relative relocation. */
924
925 /* R_PPC64_TOC16 47 half16* S + A - .TOC. */
926 HOWTO (R_PPC64_TOC16, /* type */
927 0, /* rightshift */
928 1, /* size (0 = byte, 1 = short, 2 = long) */
929 16, /* bitsize */
930 FALSE, /* pc_relative */
931 0, /* bitpos */
932 complain_overflow_signed, /* complain_on_overflow */
933 ppc64_elf_toc_reloc, /* special_function */
934 "R_PPC64_TOC16", /* name */
935 FALSE, /* partial_inplace */
936 0, /* src_mask */
937 0xffff, /* dst_mask */
938 FALSE), /* pcrel_offset */
939
940 /* 16 bit TOC-relative relocation without overflow. */
941
942 /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
943 HOWTO (R_PPC64_TOC16_LO, /* type */
944 0, /* rightshift */
945 1, /* size (0 = byte, 1 = short, 2 = long) */
946 16, /* bitsize */
947 FALSE, /* pc_relative */
948 0, /* bitpos */
949 complain_overflow_dont, /* complain_on_overflow */
950 ppc64_elf_toc_reloc, /* special_function */
951 "R_PPC64_TOC16_LO", /* name */
952 FALSE, /* partial_inplace */
953 0, /* src_mask */
954 0xffff, /* dst_mask */
955 FALSE), /* pcrel_offset */
956
957 /* 16 bit TOC-relative relocation, high 16 bits. */
958
959 /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
960 HOWTO (R_PPC64_TOC16_HI, /* type */
961 16, /* rightshift */
962 1, /* size (0 = byte, 1 = short, 2 = long) */
963 16, /* bitsize */
964 FALSE, /* pc_relative */
965 0, /* bitpos */
966 complain_overflow_dont, /* complain_on_overflow */
967 ppc64_elf_toc_reloc, /* special_function */
968 "R_PPC64_TOC16_HI", /* name */
969 FALSE, /* partial_inplace */
970 0, /* src_mask */
971 0xffff, /* dst_mask */
972 FALSE), /* pcrel_offset */
973
974 /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the
975 contents of the low 16 bits, treated as a signed number, is
976 negative. */
977
978 /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
979 HOWTO (R_PPC64_TOC16_HA, /* type */
980 16, /* rightshift */
981 1, /* size (0 = byte, 1 = short, 2 = long) */
982 16, /* bitsize */
983 FALSE, /* pc_relative */
984 0, /* bitpos */
985 complain_overflow_dont, /* complain_on_overflow */
986 ppc64_elf_toc_ha_reloc, /* special_function */
987 "R_PPC64_TOC16_HA", /* name */
988 FALSE, /* partial_inplace */
989 0, /* src_mask */
990 0xffff, /* dst_mask */
991 FALSE), /* pcrel_offset */
992
993 /* 64-bit relocation; insert value of TOC base (.TOC.). */
994
995 /* R_PPC64_TOC 51 doubleword64 .TOC. */
996 HOWTO (R_PPC64_TOC, /* type */
997 0, /* rightshift */
998 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
999 64, /* bitsize */
1000 FALSE, /* pc_relative */
1001 0, /* bitpos */
1002 complain_overflow_bitfield, /* complain_on_overflow */
1003 ppc64_elf_toc64_reloc, /* special_function */
1004 "R_PPC64_TOC", /* name */
1005 FALSE, /* partial_inplace */
1006 0, /* src_mask */
1007 ONES (64), /* dst_mask */
1008 FALSE), /* pcrel_offset */
1009
1010 /* Like R_PPC64_GOT16, but also informs the link editor that the
1011 value to relocate may (!) refer to a PLT entry which the link
1012 editor (a) may replace with the symbol value. If the link editor
1013 is unable to fully resolve the symbol, it may (b) create a PLT
1014 entry and store the address to the new PLT entry in the GOT.
1015 This permits lazy resolution of function symbols at run time.
1016 The link editor may also skip all of this and just (c) emit a
1017 R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
1018 /* FIXME: R_PPC64_PLTGOT16 not implemented. */
1019 HOWTO (R_PPC64_PLTGOT16, /* type */
1020 0, /* rightshift */
1021 1, /* size (0 = byte, 1 = short, 2 = long) */
1022 16, /* bitsize */
1023 FALSE, /* pc_relative */
1024 0, /* bitpos */
1025 complain_overflow_signed, /* complain_on_overflow */
1026 ppc64_elf_unhandled_reloc, /* special_function */
1027 "R_PPC64_PLTGOT16", /* name */
1028 FALSE, /* partial_inplace */
1029 0, /* src_mask */
1030 0xffff, /* dst_mask */
1031 FALSE), /* pcrel_offset */
1032
1033 /* Like R_PPC64_PLTGOT16, but without overflow. */
1034 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1035 HOWTO (R_PPC64_PLTGOT16_LO, /* type */
1036 0, /* rightshift */
1037 1, /* size (0 = byte, 1 = short, 2 = long) */
1038 16, /* bitsize */
1039 FALSE, /* pc_relative */
1040 0, /* bitpos */
1041 complain_overflow_dont, /* complain_on_overflow */
1042 ppc64_elf_unhandled_reloc, /* special_function */
1043 "R_PPC64_PLTGOT16_LO", /* name */
1044 FALSE, /* partial_inplace */
1045 0, /* src_mask */
1046 0xffff, /* dst_mask */
1047 FALSE), /* pcrel_offset */
1048
1049 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */
1050 /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */
1051 HOWTO (R_PPC64_PLTGOT16_HI, /* type */
1052 16, /* rightshift */
1053 1, /* size (0 = byte, 1 = short, 2 = long) */
1054 16, /* bitsize */
1055 FALSE, /* pc_relative */
1056 0, /* bitpos */
1057 complain_overflow_dont, /* complain_on_overflow */
1058 ppc64_elf_unhandled_reloc, /* special_function */
1059 "R_PPC64_PLTGOT16_HI", /* name */
1060 FALSE, /* partial_inplace */
1061 0, /* src_mask */
1062 0xffff, /* dst_mask */
1063 FALSE), /* pcrel_offset */
1064
1065 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus
1066 1 if the contents of the low 16 bits, treated as a signed number,
1067 is negative. */
1068 /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */
1069 HOWTO (R_PPC64_PLTGOT16_HA, /* type */
1070 16, /* rightshift */
1071 1, /* size (0 = byte, 1 = short, 2 = long) */
1072 16, /* bitsize */
1073 FALSE, /* pc_relative */
1074 0, /* bitpos */
1075 complain_overflow_dont,/* complain_on_overflow */
1076 ppc64_elf_unhandled_reloc, /* special_function */
1077 "R_PPC64_PLTGOT16_HA", /* name */
1078 FALSE, /* partial_inplace */
1079 0, /* src_mask */
1080 0xffff, /* dst_mask */
1081 FALSE), /* pcrel_offset */
1082
1083 /* Like R_PPC64_ADDR16, but for instructions with a DS field. */
1084 HOWTO (R_PPC64_ADDR16_DS, /* type */
1085 0, /* rightshift */
1086 1, /* size (0 = byte, 1 = short, 2 = long) */
1087 16, /* bitsize */
1088 FALSE, /* pc_relative */
1089 0, /* bitpos */
1090 complain_overflow_bitfield, /* complain_on_overflow */
1091 bfd_elf_generic_reloc, /* special_function */
1092 "R_PPC64_ADDR16_DS", /* name */
1093 FALSE, /* partial_inplace */
1094 0, /* src_mask */
1095 0xfffc, /* dst_mask */
1096 FALSE), /* pcrel_offset */
1097
1098 /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
1099 HOWTO (R_PPC64_ADDR16_LO_DS, /* type */
1100 0, /* rightshift */
1101 1, /* size (0 = byte, 1 = short, 2 = long) */
1102 16, /* bitsize */
1103 FALSE, /* pc_relative */
1104 0, /* bitpos */
1105 complain_overflow_dont,/* complain_on_overflow */
1106 bfd_elf_generic_reloc, /* special_function */
1107 "R_PPC64_ADDR16_LO_DS",/* name */
1108 FALSE, /* partial_inplace */
1109 0, /* src_mask */
1110 0xfffc, /* dst_mask */
1111 FALSE), /* pcrel_offset */
1112
1113 /* Like R_PPC64_GOT16, but for instructions with a DS field. */
1114 HOWTO (R_PPC64_GOT16_DS, /* type */
1115 0, /* rightshift */
1116 1, /* size (0 = byte, 1 = short, 2 = long) */
1117 16, /* bitsize */
1118 FALSE, /* pc_relative */
1119 0, /* bitpos */
1120 complain_overflow_signed, /* complain_on_overflow */
1121 ppc64_elf_unhandled_reloc, /* special_function */
1122 "R_PPC64_GOT16_DS", /* name */
1123 FALSE, /* partial_inplace */
1124 0, /* src_mask */
1125 0xfffc, /* dst_mask */
1126 FALSE), /* pcrel_offset */
1127
1128 /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
1129 HOWTO (R_PPC64_GOT16_LO_DS, /* type */
1130 0, /* rightshift */
1131 1, /* size (0 = byte, 1 = short, 2 = long) */
1132 16, /* bitsize */
1133 FALSE, /* pc_relative */
1134 0, /* bitpos */
1135 complain_overflow_dont, /* complain_on_overflow */
1136 ppc64_elf_unhandled_reloc, /* special_function */
1137 "R_PPC64_GOT16_LO_DS", /* name */
1138 FALSE, /* partial_inplace */
1139 0, /* src_mask */
1140 0xfffc, /* dst_mask */
1141 FALSE), /* pcrel_offset */
1142
1143 /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
1144 HOWTO (R_PPC64_PLT16_LO_DS, /* type */
1145 0, /* rightshift */
1146 1, /* size (0 = byte, 1 = short, 2 = long) */
1147 16, /* bitsize */
1148 FALSE, /* pc_relative */
1149 0, /* bitpos */
1150 complain_overflow_dont, /* complain_on_overflow */
1151 ppc64_elf_unhandled_reloc, /* special_function */
1152 "R_PPC64_PLT16_LO_DS", /* name */
1153 FALSE, /* partial_inplace */
1154 0, /* src_mask */
1155 0xfffc, /* dst_mask */
1156 FALSE), /* pcrel_offset */
1157
1158 /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
1159 HOWTO (R_PPC64_SECTOFF_DS, /* type */
1160 0, /* rightshift */
1161 1, /* size (0 = byte, 1 = short, 2 = long) */
1162 16, /* bitsize */
1163 FALSE, /* pc_relative */
1164 0, /* bitpos */
1165 complain_overflow_bitfield, /* complain_on_overflow */
1166 ppc64_elf_sectoff_reloc, /* special_function */
1167 "R_PPC64_SECTOFF_DS", /* name */
1168 FALSE, /* partial_inplace */
1169 0, /* src_mask */
1170 0xfffc, /* dst_mask */
1171 FALSE), /* pcrel_offset */
1172
1173 /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
1174 HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */
1175 0, /* rightshift */
1176 1, /* size (0 = byte, 1 = short, 2 = long) */
1177 16, /* bitsize */
1178 FALSE, /* pc_relative */
1179 0, /* bitpos */
1180 complain_overflow_dont, /* complain_on_overflow */
1181 ppc64_elf_sectoff_reloc, /* special_function */
1182 "R_PPC64_SECTOFF_LO_DS",/* name */
1183 FALSE, /* partial_inplace */
1184 0, /* src_mask */
1185 0xfffc, /* dst_mask */
1186 FALSE), /* pcrel_offset */
1187
1188 /* Like R_PPC64_TOC16, but for instructions with a DS field. */
1189 HOWTO (R_PPC64_TOC16_DS, /* type */
1190 0, /* rightshift */
1191 1, /* size (0 = byte, 1 = short, 2 = long) */
1192 16, /* bitsize */
1193 FALSE, /* pc_relative */
1194 0, /* bitpos */
1195 complain_overflow_signed, /* complain_on_overflow */
1196 ppc64_elf_toc_reloc, /* special_function */
1197 "R_PPC64_TOC16_DS", /* name */
1198 FALSE, /* partial_inplace */
1199 0, /* src_mask */
1200 0xfffc, /* dst_mask */
1201 FALSE), /* pcrel_offset */
1202
1203 /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
1204 HOWTO (R_PPC64_TOC16_LO_DS, /* type */
1205 0, /* rightshift */
1206 1, /* size (0 = byte, 1 = short, 2 = long) */
1207 16, /* bitsize */
1208 FALSE, /* pc_relative */
1209 0, /* bitpos */
1210 complain_overflow_dont, /* complain_on_overflow */
1211 ppc64_elf_toc_reloc, /* special_function */
1212 "R_PPC64_TOC16_LO_DS", /* name */
1213 FALSE, /* partial_inplace */
1214 0, /* src_mask */
1215 0xfffc, /* dst_mask */
1216 FALSE), /* pcrel_offset */
1217
1218 /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
1219 /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
1220 HOWTO (R_PPC64_PLTGOT16_DS, /* type */
1221 0, /* rightshift */
1222 1, /* size (0 = byte, 1 = short, 2 = long) */
1223 16, /* bitsize */
1224 FALSE, /* pc_relative */
1225 0, /* bitpos */
1226 complain_overflow_signed, /* complain_on_overflow */
1227 ppc64_elf_unhandled_reloc, /* special_function */
1228 "R_PPC64_PLTGOT16_DS", /* name */
1229 FALSE, /* partial_inplace */
1230 0, /* src_mask */
1231 0xfffc, /* dst_mask */
1232 FALSE), /* pcrel_offset */
1233
1234 /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */
1235 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1236 HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */
1237 0, /* rightshift */
1238 1, /* size (0 = byte, 1 = short, 2 = long) */
1239 16, /* bitsize */
1240 FALSE, /* pc_relative */
1241 0, /* bitpos */
1242 complain_overflow_dont, /* complain_on_overflow */
1243 ppc64_elf_unhandled_reloc, /* special_function */
1244 "R_PPC64_PLTGOT16_LO_DS",/* name */
1245 FALSE, /* partial_inplace */
1246 0, /* src_mask */
1247 0xfffc, /* dst_mask */
1248 FALSE), /* pcrel_offset */
1249
1250 /* Marker relocs for TLS. */
1251 HOWTO (R_PPC64_TLS,
1252 0, /* rightshift */
1253 2, /* size (0 = byte, 1 = short, 2 = long) */
1254 32, /* bitsize */
1255 FALSE, /* pc_relative */
1256 0, /* bitpos */
1257 complain_overflow_dont, /* complain_on_overflow */
1258 bfd_elf_generic_reloc, /* special_function */
1259 "R_PPC64_TLS", /* name */
1260 FALSE, /* partial_inplace */
1261 0, /* src_mask */
1262 0, /* dst_mask */
1263 FALSE), /* pcrel_offset */
1264
1265 HOWTO (R_PPC64_TLSGD,
1266 0, /* rightshift */
1267 2, /* size (0 = byte, 1 = short, 2 = long) */
1268 32, /* bitsize */
1269 FALSE, /* pc_relative */
1270 0, /* bitpos */
1271 complain_overflow_dont, /* complain_on_overflow */
1272 bfd_elf_generic_reloc, /* special_function */
1273 "R_PPC64_TLSGD", /* name */
1274 FALSE, /* partial_inplace */
1275 0, /* src_mask */
1276 0, /* dst_mask */
1277 FALSE), /* pcrel_offset */
1278
1279 HOWTO (R_PPC64_TLSLD,
1280 0, /* rightshift */
1281 2, /* size (0 = byte, 1 = short, 2 = long) */
1282 32, /* bitsize */
1283 FALSE, /* pc_relative */
1284 0, /* bitpos */
1285 complain_overflow_dont, /* complain_on_overflow */
1286 bfd_elf_generic_reloc, /* special_function */
1287 "R_PPC64_TLSLD", /* name */
1288 FALSE, /* partial_inplace */
1289 0, /* src_mask */
1290 0, /* dst_mask */
1291 FALSE), /* pcrel_offset */
1292
1293 HOWTO (R_PPC64_TOCSAVE,
1294 0, /* rightshift */
1295 2, /* size (0 = byte, 1 = short, 2 = long) */
1296 32, /* bitsize */
1297 FALSE, /* pc_relative */
1298 0, /* bitpos */
1299 complain_overflow_dont, /* complain_on_overflow */
1300 bfd_elf_generic_reloc, /* special_function */
1301 "R_PPC64_TOCSAVE", /* name */
1302 FALSE, /* partial_inplace */
1303 0, /* src_mask */
1304 0, /* dst_mask */
1305 FALSE), /* pcrel_offset */
1306
1307 /* Computes the load module index of the load module that contains the
1308 definition of its TLS sym. */
1309 HOWTO (R_PPC64_DTPMOD64,
1310 0, /* rightshift */
1311 4, /* size (0 = byte, 1 = short, 2 = long) */
1312 64, /* bitsize */
1313 FALSE, /* pc_relative */
1314 0, /* bitpos */
1315 complain_overflow_dont, /* complain_on_overflow */
1316 ppc64_elf_unhandled_reloc, /* special_function */
1317 "R_PPC64_DTPMOD64", /* name */
1318 FALSE, /* partial_inplace */
1319 0, /* src_mask */
1320 ONES (64), /* dst_mask */
1321 FALSE), /* pcrel_offset */
1322
1323 /* Computes a dtv-relative displacement, the difference between the value
1324 of sym+add and the base address of the thread-local storage block that
1325 contains the definition of sym, minus 0x8000. */
1326 HOWTO (R_PPC64_DTPREL64,
1327 0, /* rightshift */
1328 4, /* size (0 = byte, 1 = short, 2 = long) */
1329 64, /* bitsize */
1330 FALSE, /* pc_relative */
1331 0, /* bitpos */
1332 complain_overflow_dont, /* complain_on_overflow */
1333 ppc64_elf_unhandled_reloc, /* special_function */
1334 "R_PPC64_DTPREL64", /* name */
1335 FALSE, /* partial_inplace */
1336 0, /* src_mask */
1337 ONES (64), /* dst_mask */
1338 FALSE), /* pcrel_offset */
1339
1340 /* A 16 bit dtprel reloc. */
1341 HOWTO (R_PPC64_DTPREL16,
1342 0, /* rightshift */
1343 1, /* size (0 = byte, 1 = short, 2 = long) */
1344 16, /* bitsize */
1345 FALSE, /* pc_relative */
1346 0, /* bitpos */
1347 complain_overflow_signed, /* complain_on_overflow */
1348 ppc64_elf_unhandled_reloc, /* special_function */
1349 "R_PPC64_DTPREL16", /* name */
1350 FALSE, /* partial_inplace */
1351 0, /* src_mask */
1352 0xffff, /* dst_mask */
1353 FALSE), /* pcrel_offset */
1354
1355 /* Like DTPREL16, but no overflow. */
1356 HOWTO (R_PPC64_DTPREL16_LO,
1357 0, /* rightshift */
1358 1, /* size (0 = byte, 1 = short, 2 = long) */
1359 16, /* bitsize */
1360 FALSE, /* pc_relative */
1361 0, /* bitpos */
1362 complain_overflow_dont, /* complain_on_overflow */
1363 ppc64_elf_unhandled_reloc, /* special_function */
1364 "R_PPC64_DTPREL16_LO", /* name */
1365 FALSE, /* partial_inplace */
1366 0, /* src_mask */
1367 0xffff, /* dst_mask */
1368 FALSE), /* pcrel_offset */
1369
1370 /* Like DTPREL16_LO, but next higher group of 16 bits. */
1371 HOWTO (R_PPC64_DTPREL16_HI,
1372 16, /* rightshift */
1373 1, /* size (0 = byte, 1 = short, 2 = long) */
1374 16, /* bitsize */
1375 FALSE, /* pc_relative */
1376 0, /* bitpos */
1377 complain_overflow_dont, /* complain_on_overflow */
1378 ppc64_elf_unhandled_reloc, /* special_function */
1379 "R_PPC64_DTPREL16_HI", /* name */
1380 FALSE, /* partial_inplace */
1381 0, /* src_mask */
1382 0xffff, /* dst_mask */
1383 FALSE), /* pcrel_offset */
1384
1385 /* Like DTPREL16_HI, but adjust for low 16 bits. */
1386 HOWTO (R_PPC64_DTPREL16_HA,
1387 16, /* rightshift */
1388 1, /* size (0 = byte, 1 = short, 2 = long) */
1389 16, /* bitsize */
1390 FALSE, /* pc_relative */
1391 0, /* bitpos */
1392 complain_overflow_dont, /* complain_on_overflow */
1393 ppc64_elf_unhandled_reloc, /* special_function */
1394 "R_PPC64_DTPREL16_HA", /* name */
1395 FALSE, /* partial_inplace */
1396 0, /* src_mask */
1397 0xffff, /* dst_mask */
1398 FALSE), /* pcrel_offset */
1399
1400 /* Like DTPREL16_HI, but next higher group of 16 bits. */
1401 HOWTO (R_PPC64_DTPREL16_HIGHER,
1402 32, /* rightshift */
1403 1, /* size (0 = byte, 1 = short, 2 = long) */
1404 16, /* bitsize */
1405 FALSE, /* pc_relative */
1406 0, /* bitpos */
1407 complain_overflow_dont, /* complain_on_overflow */
1408 ppc64_elf_unhandled_reloc, /* special_function */
1409 "R_PPC64_DTPREL16_HIGHER", /* name */
1410 FALSE, /* partial_inplace */
1411 0, /* src_mask */
1412 0xffff, /* dst_mask */
1413 FALSE), /* pcrel_offset */
1414
1415 /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */
1416 HOWTO (R_PPC64_DTPREL16_HIGHERA,
1417 32, /* rightshift */
1418 1, /* size (0 = byte, 1 = short, 2 = long) */
1419 16, /* bitsize */
1420 FALSE, /* pc_relative */
1421 0, /* bitpos */
1422 complain_overflow_dont, /* complain_on_overflow */
1423 ppc64_elf_unhandled_reloc, /* special_function */
1424 "R_PPC64_DTPREL16_HIGHERA", /* name */
1425 FALSE, /* partial_inplace */
1426 0, /* src_mask */
1427 0xffff, /* dst_mask */
1428 FALSE), /* pcrel_offset */
1429
1430 /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */
1431 HOWTO (R_PPC64_DTPREL16_HIGHEST,
1432 48, /* rightshift */
1433 1, /* size (0 = byte, 1 = short, 2 = long) */
1434 16, /* bitsize */
1435 FALSE, /* pc_relative */
1436 0, /* bitpos */
1437 complain_overflow_dont, /* complain_on_overflow */
1438 ppc64_elf_unhandled_reloc, /* special_function */
1439 "R_PPC64_DTPREL16_HIGHEST", /* name */
1440 FALSE, /* partial_inplace */
1441 0, /* src_mask */
1442 0xffff, /* dst_mask */
1443 FALSE), /* pcrel_offset */
1444
1445 /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */
1446 HOWTO (R_PPC64_DTPREL16_HIGHESTA,
1447 48, /* rightshift */
1448 1, /* size (0 = byte, 1 = short, 2 = long) */
1449 16, /* bitsize */
1450 FALSE, /* pc_relative */
1451 0, /* bitpos */
1452 complain_overflow_dont, /* complain_on_overflow */
1453 ppc64_elf_unhandled_reloc, /* special_function */
1454 "R_PPC64_DTPREL16_HIGHESTA", /* name */
1455 FALSE, /* partial_inplace */
1456 0, /* src_mask */
1457 0xffff, /* dst_mask */
1458 FALSE), /* pcrel_offset */
1459
1460 /* Like DTPREL16, but for insns with a DS field. */
1461 HOWTO (R_PPC64_DTPREL16_DS,
1462 0, /* rightshift */
1463 1, /* size (0 = byte, 1 = short, 2 = long) */
1464 16, /* bitsize */
1465 FALSE, /* pc_relative */
1466 0, /* bitpos */
1467 complain_overflow_signed, /* complain_on_overflow */
1468 ppc64_elf_unhandled_reloc, /* special_function */
1469 "R_PPC64_DTPREL16_DS", /* name */
1470 FALSE, /* partial_inplace */
1471 0, /* src_mask */
1472 0xfffc, /* dst_mask */
1473 FALSE), /* pcrel_offset */
1474
1475 /* Like DTPREL16_DS, but no overflow. */
1476 HOWTO (R_PPC64_DTPREL16_LO_DS,
1477 0, /* rightshift */
1478 1, /* size (0 = byte, 1 = short, 2 = long) */
1479 16, /* bitsize */
1480 FALSE, /* pc_relative */
1481 0, /* bitpos */
1482 complain_overflow_dont, /* complain_on_overflow */
1483 ppc64_elf_unhandled_reloc, /* special_function */
1484 "R_PPC64_DTPREL16_LO_DS", /* name */
1485 FALSE, /* partial_inplace */
1486 0, /* src_mask */
1487 0xfffc, /* dst_mask */
1488 FALSE), /* pcrel_offset */
1489
1490 /* Computes a tp-relative displacement, the difference between the value of
1491 sym+add and the value of the thread pointer (r13). */
1492 HOWTO (R_PPC64_TPREL64,
1493 0, /* rightshift */
1494 4, /* size (0 = byte, 1 = short, 2 = long) */
1495 64, /* bitsize */
1496 FALSE, /* pc_relative */
1497 0, /* bitpos */
1498 complain_overflow_dont, /* complain_on_overflow */
1499 ppc64_elf_unhandled_reloc, /* special_function */
1500 "R_PPC64_TPREL64", /* name */
1501 FALSE, /* partial_inplace */
1502 0, /* src_mask */
1503 ONES (64), /* dst_mask */
1504 FALSE), /* pcrel_offset */
1505
1506 /* A 16 bit tprel reloc. */
1507 HOWTO (R_PPC64_TPREL16,
1508 0, /* rightshift */
1509 1, /* size (0 = byte, 1 = short, 2 = long) */
1510 16, /* bitsize */
1511 FALSE, /* pc_relative */
1512 0, /* bitpos */
1513 complain_overflow_signed, /* complain_on_overflow */
1514 ppc64_elf_unhandled_reloc, /* special_function */
1515 "R_PPC64_TPREL16", /* name */
1516 FALSE, /* partial_inplace */
1517 0, /* src_mask */
1518 0xffff, /* dst_mask */
1519 FALSE), /* pcrel_offset */
1520
1521 /* Like TPREL16, but no overflow. */
1522 HOWTO (R_PPC64_TPREL16_LO,
1523 0, /* rightshift */
1524 1, /* size (0 = byte, 1 = short, 2 = long) */
1525 16, /* bitsize */
1526 FALSE, /* pc_relative */
1527 0, /* bitpos */
1528 complain_overflow_dont, /* complain_on_overflow */
1529 ppc64_elf_unhandled_reloc, /* special_function */
1530 "R_PPC64_TPREL16_LO", /* name */
1531 FALSE, /* partial_inplace */
1532 0, /* src_mask */
1533 0xffff, /* dst_mask */
1534 FALSE), /* pcrel_offset */
1535
1536 /* Like TPREL16_LO, but next higher group of 16 bits. */
1537 HOWTO (R_PPC64_TPREL16_HI,
1538 16, /* rightshift */
1539 1, /* size (0 = byte, 1 = short, 2 = long) */
1540 16, /* bitsize */
1541 FALSE, /* pc_relative */
1542 0, /* bitpos */
1543 complain_overflow_dont, /* complain_on_overflow */
1544 ppc64_elf_unhandled_reloc, /* special_function */
1545 "R_PPC64_TPREL16_HI", /* name */
1546 FALSE, /* partial_inplace */
1547 0, /* src_mask */
1548 0xffff, /* dst_mask */
1549 FALSE), /* pcrel_offset */
1550
1551 /* Like TPREL16_HI, but adjust for low 16 bits. */
1552 HOWTO (R_PPC64_TPREL16_HA,
1553 16, /* rightshift */
1554 1, /* size (0 = byte, 1 = short, 2 = long) */
1555 16, /* bitsize */
1556 FALSE, /* pc_relative */
1557 0, /* bitpos */
1558 complain_overflow_dont, /* complain_on_overflow */
1559 ppc64_elf_unhandled_reloc, /* special_function */
1560 "R_PPC64_TPREL16_HA", /* name */
1561 FALSE, /* partial_inplace */
1562 0, /* src_mask */
1563 0xffff, /* dst_mask */
1564 FALSE), /* pcrel_offset */
1565
1566 /* Like TPREL16_HI, but next higher group of 16 bits. */
1567 HOWTO (R_PPC64_TPREL16_HIGHER,
1568 32, /* rightshift */
1569 1, /* size (0 = byte, 1 = short, 2 = long) */
1570 16, /* bitsize */
1571 FALSE, /* pc_relative */
1572 0, /* bitpos */
1573 complain_overflow_dont, /* complain_on_overflow */
1574 ppc64_elf_unhandled_reloc, /* special_function */
1575 "R_PPC64_TPREL16_HIGHER", /* name */
1576 FALSE, /* partial_inplace */
1577 0, /* src_mask */
1578 0xffff, /* dst_mask */
1579 FALSE), /* pcrel_offset */
1580
1581 /* Like TPREL16_HIGHER, but adjust for low 16 bits. */
1582 HOWTO (R_PPC64_TPREL16_HIGHERA,
1583 32, /* rightshift */
1584 1, /* size (0 = byte, 1 = short, 2 = long) */
1585 16, /* bitsize */
1586 FALSE, /* pc_relative */
1587 0, /* bitpos */
1588 complain_overflow_dont, /* complain_on_overflow */
1589 ppc64_elf_unhandled_reloc, /* special_function */
1590 "R_PPC64_TPREL16_HIGHERA", /* name */
1591 FALSE, /* partial_inplace */
1592 0, /* src_mask */
1593 0xffff, /* dst_mask */
1594 FALSE), /* pcrel_offset */
1595
1596 /* Like TPREL16_HIGHER, but next higher group of 16 bits. */
1597 HOWTO (R_PPC64_TPREL16_HIGHEST,
1598 48, /* rightshift */
1599 1, /* size (0 = byte, 1 = short, 2 = long) */
1600 16, /* bitsize */
1601 FALSE, /* pc_relative */
1602 0, /* bitpos */
1603 complain_overflow_dont, /* complain_on_overflow */
1604 ppc64_elf_unhandled_reloc, /* special_function */
1605 "R_PPC64_TPREL16_HIGHEST", /* name */
1606 FALSE, /* partial_inplace */
1607 0, /* src_mask */
1608 0xffff, /* dst_mask */
1609 FALSE), /* pcrel_offset */
1610
1611 /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */
1612 HOWTO (R_PPC64_TPREL16_HIGHESTA,
1613 48, /* rightshift */
1614 1, /* size (0 = byte, 1 = short, 2 = long) */
1615 16, /* bitsize */
1616 FALSE, /* pc_relative */
1617 0, /* bitpos */
1618 complain_overflow_dont, /* complain_on_overflow */
1619 ppc64_elf_unhandled_reloc, /* special_function */
1620 "R_PPC64_TPREL16_HIGHESTA", /* name */
1621 FALSE, /* partial_inplace */
1622 0, /* src_mask */
1623 0xffff, /* dst_mask */
1624 FALSE), /* pcrel_offset */
1625
1626 /* Like TPREL16, but for insns with a DS field. */
1627 HOWTO (R_PPC64_TPREL16_DS,
1628 0, /* rightshift */
1629 1, /* size (0 = byte, 1 = short, 2 = long) */
1630 16, /* bitsize */
1631 FALSE, /* pc_relative */
1632 0, /* bitpos */
1633 complain_overflow_signed, /* complain_on_overflow */
1634 ppc64_elf_unhandled_reloc, /* special_function */
1635 "R_PPC64_TPREL16_DS", /* name */
1636 FALSE, /* partial_inplace */
1637 0, /* src_mask */
1638 0xfffc, /* dst_mask */
1639 FALSE), /* pcrel_offset */
1640
1641 /* Like TPREL16_DS, but no overflow. */
1642 HOWTO (R_PPC64_TPREL16_LO_DS,
1643 0, /* rightshift */
1644 1, /* size (0 = byte, 1 = short, 2 = long) */
1645 16, /* bitsize */
1646 FALSE, /* pc_relative */
1647 0, /* bitpos */
1648 complain_overflow_dont, /* complain_on_overflow */
1649 ppc64_elf_unhandled_reloc, /* special_function */
1650 "R_PPC64_TPREL16_LO_DS", /* name */
1651 FALSE, /* partial_inplace */
1652 0, /* src_mask */
1653 0xfffc, /* dst_mask */
1654 FALSE), /* pcrel_offset */
1655
1656 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1657 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1658 to the first entry relative to the TOC base (r2). */
1659 HOWTO (R_PPC64_GOT_TLSGD16,
1660 0, /* rightshift */
1661 1, /* size (0 = byte, 1 = short, 2 = long) */
1662 16, /* bitsize */
1663 FALSE, /* pc_relative */
1664 0, /* bitpos */
1665 complain_overflow_signed, /* complain_on_overflow */
1666 ppc64_elf_unhandled_reloc, /* special_function */
1667 "R_PPC64_GOT_TLSGD16", /* name */
1668 FALSE, /* partial_inplace */
1669 0, /* src_mask */
1670 0xffff, /* dst_mask */
1671 FALSE), /* pcrel_offset */
1672
1673 /* Like GOT_TLSGD16, but no overflow. */
1674 HOWTO (R_PPC64_GOT_TLSGD16_LO,
1675 0, /* rightshift */
1676 1, /* size (0 = byte, 1 = short, 2 = long) */
1677 16, /* bitsize */
1678 FALSE, /* pc_relative */
1679 0, /* bitpos */
1680 complain_overflow_dont, /* complain_on_overflow */
1681 ppc64_elf_unhandled_reloc, /* special_function */
1682 "R_PPC64_GOT_TLSGD16_LO", /* name */
1683 FALSE, /* partial_inplace */
1684 0, /* src_mask */
1685 0xffff, /* dst_mask */
1686 FALSE), /* pcrel_offset */
1687
1688 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1689 HOWTO (R_PPC64_GOT_TLSGD16_HI,
1690 16, /* rightshift */
1691 1, /* size (0 = byte, 1 = short, 2 = long) */
1692 16, /* bitsize */
1693 FALSE, /* pc_relative */
1694 0, /* bitpos */
1695 complain_overflow_dont, /* complain_on_overflow */
1696 ppc64_elf_unhandled_reloc, /* special_function */
1697 "R_PPC64_GOT_TLSGD16_HI", /* name */
1698 FALSE, /* partial_inplace */
1699 0, /* src_mask */
1700 0xffff, /* dst_mask */
1701 FALSE), /* pcrel_offset */
1702
1703 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1704 HOWTO (R_PPC64_GOT_TLSGD16_HA,
1705 16, /* rightshift */
1706 1, /* size (0 = byte, 1 = short, 2 = long) */
1707 16, /* bitsize */
1708 FALSE, /* pc_relative */
1709 0, /* bitpos */
1710 complain_overflow_dont, /* complain_on_overflow */
1711 ppc64_elf_unhandled_reloc, /* special_function */
1712 "R_PPC64_GOT_TLSGD16_HA", /* name */
1713 FALSE, /* partial_inplace */
1714 0, /* src_mask */
1715 0xffff, /* dst_mask */
1716 FALSE), /* pcrel_offset */
1717
1718 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1719 with values (sym+add)@dtpmod and zero, and computes the offset to the
1720 first entry relative to the TOC base (r2). */
1721 HOWTO (R_PPC64_GOT_TLSLD16,
1722 0, /* rightshift */
1723 1, /* size (0 = byte, 1 = short, 2 = long) */
1724 16, /* bitsize */
1725 FALSE, /* pc_relative */
1726 0, /* bitpos */
1727 complain_overflow_signed, /* complain_on_overflow */
1728 ppc64_elf_unhandled_reloc, /* special_function */
1729 "R_PPC64_GOT_TLSLD16", /* name */
1730 FALSE, /* partial_inplace */
1731 0, /* src_mask */
1732 0xffff, /* dst_mask */
1733 FALSE), /* pcrel_offset */
1734
1735 /* Like GOT_TLSLD16, but no overflow. */
1736 HOWTO (R_PPC64_GOT_TLSLD16_LO,
1737 0, /* rightshift */
1738 1, /* size (0 = byte, 1 = short, 2 = long) */
1739 16, /* bitsize */
1740 FALSE, /* pc_relative */
1741 0, /* bitpos */
1742 complain_overflow_dont, /* complain_on_overflow */
1743 ppc64_elf_unhandled_reloc, /* special_function */
1744 "R_PPC64_GOT_TLSLD16_LO", /* name */
1745 FALSE, /* partial_inplace */
1746 0, /* src_mask */
1747 0xffff, /* dst_mask */
1748 FALSE), /* pcrel_offset */
1749
1750 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1751 HOWTO (R_PPC64_GOT_TLSLD16_HI,
1752 16, /* rightshift */
1753 1, /* size (0 = byte, 1 = short, 2 = long) */
1754 16, /* bitsize */
1755 FALSE, /* pc_relative */
1756 0, /* bitpos */
1757 complain_overflow_dont, /* complain_on_overflow */
1758 ppc64_elf_unhandled_reloc, /* special_function */
1759 "R_PPC64_GOT_TLSLD16_HI", /* name */
1760 FALSE, /* partial_inplace */
1761 0, /* src_mask */
1762 0xffff, /* dst_mask */
1763 FALSE), /* pcrel_offset */
1764
1765 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1766 HOWTO (R_PPC64_GOT_TLSLD16_HA,
1767 16, /* rightshift */
1768 1, /* size (0 = byte, 1 = short, 2 = long) */
1769 16, /* bitsize */
1770 FALSE, /* pc_relative */
1771 0, /* bitpos */
1772 complain_overflow_dont, /* complain_on_overflow */
1773 ppc64_elf_unhandled_reloc, /* special_function */
1774 "R_PPC64_GOT_TLSLD16_HA", /* name */
1775 FALSE, /* partial_inplace */
1776 0, /* src_mask */
1777 0xffff, /* dst_mask */
1778 FALSE), /* pcrel_offset */
1779
1780 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1781 the offset to the entry relative to the TOC base (r2). */
1782 HOWTO (R_PPC64_GOT_DTPREL16_DS,
1783 0, /* rightshift */
1784 1, /* size (0 = byte, 1 = short, 2 = long) */
1785 16, /* bitsize */
1786 FALSE, /* pc_relative */
1787 0, /* bitpos */
1788 complain_overflow_signed, /* complain_on_overflow */
1789 ppc64_elf_unhandled_reloc, /* special_function */
1790 "R_PPC64_GOT_DTPREL16_DS", /* name */
1791 FALSE, /* partial_inplace */
1792 0, /* src_mask */
1793 0xfffc, /* dst_mask */
1794 FALSE), /* pcrel_offset */
1795
1796 /* Like GOT_DTPREL16_DS, but no overflow. */
1797 HOWTO (R_PPC64_GOT_DTPREL16_LO_DS,
1798 0, /* rightshift */
1799 1, /* size (0 = byte, 1 = short, 2 = long) */
1800 16, /* bitsize */
1801 FALSE, /* pc_relative */
1802 0, /* bitpos */
1803 complain_overflow_dont, /* complain_on_overflow */
1804 ppc64_elf_unhandled_reloc, /* special_function */
1805 "R_PPC64_GOT_DTPREL16_LO_DS", /* name */
1806 FALSE, /* partial_inplace */
1807 0, /* src_mask */
1808 0xfffc, /* dst_mask */
1809 FALSE), /* pcrel_offset */
1810
1811 /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */
1812 HOWTO (R_PPC64_GOT_DTPREL16_HI,
1813 16, /* rightshift */
1814 1, /* size (0 = byte, 1 = short, 2 = long) */
1815 16, /* bitsize */
1816 FALSE, /* pc_relative */
1817 0, /* bitpos */
1818 complain_overflow_dont, /* complain_on_overflow */
1819 ppc64_elf_unhandled_reloc, /* special_function */
1820 "R_PPC64_GOT_DTPREL16_HI", /* name */
1821 FALSE, /* partial_inplace */
1822 0, /* src_mask */
1823 0xffff, /* dst_mask */
1824 FALSE), /* pcrel_offset */
1825
1826 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1827 HOWTO (R_PPC64_GOT_DTPREL16_HA,
1828 16, /* rightshift */
1829 1, /* size (0 = byte, 1 = short, 2 = long) */
1830 16, /* bitsize */
1831 FALSE, /* pc_relative */
1832 0, /* bitpos */
1833 complain_overflow_dont, /* complain_on_overflow */
1834 ppc64_elf_unhandled_reloc, /* special_function */
1835 "R_PPC64_GOT_DTPREL16_HA", /* name */
1836 FALSE, /* partial_inplace */
1837 0, /* src_mask */
1838 0xffff, /* dst_mask */
1839 FALSE), /* pcrel_offset */
1840
1841 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1842 offset to the entry relative to the TOC base (r2). */
1843 HOWTO (R_PPC64_GOT_TPREL16_DS,
1844 0, /* rightshift */
1845 1, /* size (0 = byte, 1 = short, 2 = long) */
1846 16, /* bitsize */
1847 FALSE, /* pc_relative */
1848 0, /* bitpos */
1849 complain_overflow_signed, /* complain_on_overflow */
1850 ppc64_elf_unhandled_reloc, /* special_function */
1851 "R_PPC64_GOT_TPREL16_DS", /* name */
1852 FALSE, /* partial_inplace */
1853 0, /* src_mask */
1854 0xfffc, /* dst_mask */
1855 FALSE), /* pcrel_offset */
1856
1857 /* Like GOT_TPREL16_DS, but no overflow. */
1858 HOWTO (R_PPC64_GOT_TPREL16_LO_DS,
1859 0, /* rightshift */
1860 1, /* size (0 = byte, 1 = short, 2 = long) */
1861 16, /* bitsize */
1862 FALSE, /* pc_relative */
1863 0, /* bitpos */
1864 complain_overflow_dont, /* complain_on_overflow */
1865 ppc64_elf_unhandled_reloc, /* special_function */
1866 "R_PPC64_GOT_TPREL16_LO_DS", /* name */
1867 FALSE, /* partial_inplace */
1868 0, /* src_mask */
1869 0xfffc, /* dst_mask */
1870 FALSE), /* pcrel_offset */
1871
1872 /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */
1873 HOWTO (R_PPC64_GOT_TPREL16_HI,
1874 16, /* rightshift */
1875 1, /* size (0 = byte, 1 = short, 2 = long) */
1876 16, /* bitsize */
1877 FALSE, /* pc_relative */
1878 0, /* bitpos */
1879 complain_overflow_dont, /* complain_on_overflow */
1880 ppc64_elf_unhandled_reloc, /* special_function */
1881 "R_PPC64_GOT_TPREL16_HI", /* name */
1882 FALSE, /* partial_inplace */
1883 0, /* src_mask */
1884 0xffff, /* dst_mask */
1885 FALSE), /* pcrel_offset */
1886
1887 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1888 HOWTO (R_PPC64_GOT_TPREL16_HA,
1889 16, /* rightshift */
1890 1, /* size (0 = byte, 1 = short, 2 = long) */
1891 16, /* bitsize */
1892 FALSE, /* pc_relative */
1893 0, /* bitpos */
1894 complain_overflow_dont, /* complain_on_overflow */
1895 ppc64_elf_unhandled_reloc, /* special_function */
1896 "R_PPC64_GOT_TPREL16_HA", /* name */
1897 FALSE, /* partial_inplace */
1898 0, /* src_mask */
1899 0xffff, /* dst_mask */
1900 FALSE), /* pcrel_offset */
1901
1902 HOWTO (R_PPC64_JMP_IREL, /* type */
1903 0, /* rightshift */
1904 0, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1905 0, /* bitsize */
1906 FALSE, /* pc_relative */
1907 0, /* bitpos */
1908 complain_overflow_dont, /* complain_on_overflow */
1909 ppc64_elf_unhandled_reloc, /* special_function */
1910 "R_PPC64_JMP_IREL", /* name */
1911 FALSE, /* partial_inplace */
1912 0, /* src_mask */
1913 0, /* dst_mask */
1914 FALSE), /* pcrel_offset */
1915
1916 HOWTO (R_PPC64_IRELATIVE, /* type */
1917 0, /* rightshift */
1918 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1919 64, /* bitsize */
1920 FALSE, /* pc_relative */
1921 0, /* bitpos */
1922 complain_overflow_dont, /* complain_on_overflow */
1923 bfd_elf_generic_reloc, /* special_function */
1924 "R_PPC64_IRELATIVE", /* name */
1925 FALSE, /* partial_inplace */
1926 0, /* src_mask */
1927 ONES (64), /* dst_mask */
1928 FALSE), /* pcrel_offset */
1929
1930 /* A 16 bit relative relocation. */
1931 HOWTO (R_PPC64_REL16, /* type */
1932 0, /* rightshift */
1933 1, /* size (0 = byte, 1 = short, 2 = long) */
1934 16, /* bitsize */
1935 TRUE, /* pc_relative */
1936 0, /* bitpos */
1937 complain_overflow_bitfield, /* complain_on_overflow */
1938 bfd_elf_generic_reloc, /* special_function */
1939 "R_PPC64_REL16", /* name */
1940 FALSE, /* partial_inplace */
1941 0, /* src_mask */
1942 0xffff, /* dst_mask */
1943 TRUE), /* pcrel_offset */
1944
1945 /* A 16 bit relative relocation without overflow. */
1946 HOWTO (R_PPC64_REL16_LO, /* type */
1947 0, /* rightshift */
1948 1, /* size (0 = byte, 1 = short, 2 = long) */
1949 16, /* bitsize */
1950 TRUE, /* pc_relative */
1951 0, /* bitpos */
1952 complain_overflow_dont,/* complain_on_overflow */
1953 bfd_elf_generic_reloc, /* special_function */
1954 "R_PPC64_REL16_LO", /* name */
1955 FALSE, /* partial_inplace */
1956 0, /* src_mask */
1957 0xffff, /* dst_mask */
1958 TRUE), /* pcrel_offset */
1959
1960 /* The high order 16 bits of a relative address. */
1961 HOWTO (R_PPC64_REL16_HI, /* type */
1962 16, /* rightshift */
1963 1, /* size (0 = byte, 1 = short, 2 = long) */
1964 16, /* bitsize */
1965 TRUE, /* pc_relative */
1966 0, /* bitpos */
1967 complain_overflow_dont, /* complain_on_overflow */
1968 bfd_elf_generic_reloc, /* special_function */
1969 "R_PPC64_REL16_HI", /* name */
1970 FALSE, /* partial_inplace */
1971 0, /* src_mask */
1972 0xffff, /* dst_mask */
1973 TRUE), /* pcrel_offset */
1974
1975 /* The high order 16 bits of a relative address, plus 1 if the contents of
1976 the low 16 bits, treated as a signed number, is negative. */
1977 HOWTO (R_PPC64_REL16_HA, /* type */
1978 16, /* rightshift */
1979 1, /* size (0 = byte, 1 = short, 2 = long) */
1980 16, /* bitsize */
1981 TRUE, /* pc_relative */
1982 0, /* bitpos */
1983 complain_overflow_dont, /* complain_on_overflow */
1984 ppc64_elf_ha_reloc, /* special_function */
1985 "R_PPC64_REL16_HA", /* name */
1986 FALSE, /* partial_inplace */
1987 0, /* src_mask */
1988 0xffff, /* dst_mask */
1989 TRUE), /* pcrel_offset */
1990
1991 /* GNU extension to record C++ vtable hierarchy. */
1992 HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
1993 0, /* rightshift */
1994 0, /* size (0 = byte, 1 = short, 2 = long) */
1995 0, /* bitsize */
1996 FALSE, /* pc_relative */
1997 0, /* bitpos */
1998 complain_overflow_dont, /* complain_on_overflow */
1999 NULL, /* special_function */
2000 "R_PPC64_GNU_VTINHERIT", /* name */
2001 FALSE, /* partial_inplace */
2002 0, /* src_mask */
2003 0, /* dst_mask */
2004 FALSE), /* pcrel_offset */
2005
2006 /* GNU extension to record C++ vtable member usage. */
2007 HOWTO (R_PPC64_GNU_VTENTRY, /* type */
2008 0, /* rightshift */
2009 0, /* size (0 = byte, 1 = short, 2 = long) */
2010 0, /* bitsize */
2011 FALSE, /* pc_relative */
2012 0, /* bitpos */
2013 complain_overflow_dont, /* complain_on_overflow */
2014 NULL, /* special_function */
2015 "R_PPC64_GNU_VTENTRY", /* name */
2016 FALSE, /* partial_inplace */
2017 0, /* src_mask */
2018 0, /* dst_mask */
2019 FALSE), /* pcrel_offset */
2020 };
2021
2022 \f
2023 /* Initialize the ppc64_elf_howto_table, so that linear accesses can
2024 be done. */
2025
2026 static void
2027 ppc_howto_init (void)
2028 {
2029 unsigned int i, type;
2030
2031 for (i = 0;
2032 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
2033 i++)
2034 {
2035 type = ppc64_elf_howto_raw[i].type;
2036 BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
2037 / sizeof (ppc64_elf_howto_table[0])));
2038 ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
2039 }
2040 }
2041
2042 static reloc_howto_type *
2043 ppc64_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2044 bfd_reloc_code_real_type code)
2045 {
2046 enum elf_ppc64_reloc_type r = R_PPC64_NONE;
2047
2048 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2049 /* Initialize howto table if needed. */
2050 ppc_howto_init ();
2051
2052 switch (code)
2053 {
2054 default:
2055 return NULL;
2056
2057 case BFD_RELOC_NONE: r = R_PPC64_NONE;
2058 break;
2059 case BFD_RELOC_32: r = R_PPC64_ADDR32;
2060 break;
2061 case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24;
2062 break;
2063 case BFD_RELOC_16: r = R_PPC64_ADDR16;
2064 break;
2065 case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO;
2066 break;
2067 case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI;
2068 break;
2069 case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA;
2070 break;
2071 case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14;
2072 break;
2073 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN;
2074 break;
2075 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN;
2076 break;
2077 case BFD_RELOC_PPC_B26: r = R_PPC64_REL24;
2078 break;
2079 case BFD_RELOC_PPC_B16: r = R_PPC64_REL14;
2080 break;
2081 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN;
2082 break;
2083 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN;
2084 break;
2085 case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16;
2086 break;
2087 case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO;
2088 break;
2089 case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI;
2090 break;
2091 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA;
2092 break;
2093 case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY;
2094 break;
2095 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT;
2096 break;
2097 case BFD_RELOC_32_PCREL: r = R_PPC64_REL32;
2098 break;
2099 case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32;
2100 break;
2101 case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32;
2102 break;
2103 case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO;
2104 break;
2105 case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI;
2106 break;
2107 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA;
2108 break;
2109 case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF;
2110 break;
2111 case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO;
2112 break;
2113 case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI;
2114 break;
2115 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA;
2116 break;
2117 case BFD_RELOC_CTOR: r = R_PPC64_ADDR64;
2118 break;
2119 case BFD_RELOC_64: r = R_PPC64_ADDR64;
2120 break;
2121 case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER;
2122 break;
2123 case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA;
2124 break;
2125 case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST;
2126 break;
2127 case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA;
2128 break;
2129 case BFD_RELOC_64_PCREL: r = R_PPC64_REL64;
2130 break;
2131 case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64;
2132 break;
2133 case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64;
2134 break;
2135 case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16;
2136 break;
2137 case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO;
2138 break;
2139 case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI;
2140 break;
2141 case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA;
2142 break;
2143 case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC;
2144 break;
2145 case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16;
2146 break;
2147 case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO;
2148 break;
2149 case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI;
2150 break;
2151 case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA;
2152 break;
2153 case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS;
2154 break;
2155 case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS;
2156 break;
2157 case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS;
2158 break;
2159 case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS;
2160 break;
2161 case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS;
2162 break;
2163 case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS;
2164 break;
2165 case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS;
2166 break;
2167 case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS;
2168 break;
2169 case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS;
2170 break;
2171 case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS;
2172 break;
2173 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS;
2174 break;
2175 case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS;
2176 break;
2177 case BFD_RELOC_PPC_TLSGD: r = R_PPC64_TLSGD;
2178 break;
2179 case BFD_RELOC_PPC_TLSLD: r = R_PPC64_TLSLD;
2180 break;
2181 case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64;
2182 break;
2183 case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16;
2184 break;
2185 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO;
2186 break;
2187 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI;
2188 break;
2189 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA;
2190 break;
2191 case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64;
2192 break;
2193 case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16;
2194 break;
2195 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO;
2196 break;
2197 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI;
2198 break;
2199 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA;
2200 break;
2201 case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64;
2202 break;
2203 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16;
2204 break;
2205 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO;
2206 break;
2207 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI;
2208 break;
2209 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA;
2210 break;
2211 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16;
2212 break;
2213 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO;
2214 break;
2215 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI;
2216 break;
2217 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA;
2218 break;
2219 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS;
2220 break;
2221 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS;
2222 break;
2223 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI;
2224 break;
2225 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA;
2226 break;
2227 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS;
2228 break;
2229 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS;
2230 break;
2231 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI;
2232 break;
2233 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA;
2234 break;
2235 case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS;
2236 break;
2237 case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS;
2238 break;
2239 case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER;
2240 break;
2241 case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA;
2242 break;
2243 case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST;
2244 break;
2245 case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA;
2246 break;
2247 case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS;
2248 break;
2249 case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS;
2250 break;
2251 case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER;
2252 break;
2253 case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA;
2254 break;
2255 case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST;
2256 break;
2257 case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA;
2258 break;
2259 case BFD_RELOC_16_PCREL: r = R_PPC64_REL16;
2260 break;
2261 case BFD_RELOC_LO16_PCREL: r = R_PPC64_REL16_LO;
2262 break;
2263 case BFD_RELOC_HI16_PCREL: r = R_PPC64_REL16_HI;
2264 break;
2265 case BFD_RELOC_HI16_S_PCREL: r = R_PPC64_REL16_HA;
2266 break;
2267 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT;
2268 break;
2269 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY;
2270 break;
2271 }
2272
2273 return ppc64_elf_howto_table[r];
2274 };
2275
2276 static reloc_howto_type *
2277 ppc64_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2278 const char *r_name)
2279 {
2280 unsigned int i;
2281
2282 for (i = 0;
2283 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
2284 i++)
2285 if (ppc64_elf_howto_raw[i].name != NULL
2286 && strcasecmp (ppc64_elf_howto_raw[i].name, r_name) == 0)
2287 return &ppc64_elf_howto_raw[i];
2288
2289 return NULL;
2290 }
2291
2292 /* Set the howto pointer for a PowerPC ELF reloc. */
2293
2294 static void
2295 ppc64_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
2296 Elf_Internal_Rela *dst)
2297 {
2298 unsigned int type;
2299
2300 /* Initialize howto table if needed. */
2301 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2302 ppc_howto_init ();
2303
2304 type = ELF64_R_TYPE (dst->r_info);
2305 if (type >= (sizeof (ppc64_elf_howto_table)
2306 / sizeof (ppc64_elf_howto_table[0])))
2307 {
2308 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
2309 abfd, (int) type);
2310 type = R_PPC64_NONE;
2311 }
2312 cache_ptr->howto = ppc64_elf_howto_table[type];
2313 }
2314
2315 /* Handle the R_PPC64_ADDR16_HA and similar relocs. */
2316
2317 static bfd_reloc_status_type
2318 ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2319 void *data, asection *input_section,
2320 bfd *output_bfd, char **error_message)
2321 {
2322 /* If this is a relocatable link (output_bfd test tells us), just
2323 call the generic function. Any adjustment will be done at final
2324 link time. */
2325 if (output_bfd != NULL)
2326 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2327 input_section, output_bfd, error_message);
2328
2329 /* Adjust the addend for sign extension of the low 16 bits.
2330 We won't actually be using the low 16 bits, so trashing them
2331 doesn't matter. */
2332 reloc_entry->addend += 0x8000;
2333 return bfd_reloc_continue;
2334 }
2335
2336 static bfd_reloc_status_type
2337 ppc64_elf_branch_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2338 void *data, asection *input_section,
2339 bfd *output_bfd, char **error_message)
2340 {
2341 if (output_bfd != NULL)
2342 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2343 input_section, output_bfd, error_message);
2344
2345 if (strcmp (symbol->section->name, ".opd") == 0
2346 && (symbol->section->owner->flags & DYNAMIC) == 0)
2347 {
2348 bfd_vma dest = opd_entry_value (symbol->section,
2349 symbol->value + reloc_entry->addend,
2350 NULL, NULL);
2351 if (dest != (bfd_vma) -1)
2352 reloc_entry->addend = dest - (symbol->value
2353 + symbol->section->output_section->vma
2354 + symbol->section->output_offset);
2355 }
2356 return bfd_reloc_continue;
2357 }
2358
2359 static bfd_reloc_status_type
2360 ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2361 void *data, asection *input_section,
2362 bfd *output_bfd, char **error_message)
2363 {
2364 long insn;
2365 enum elf_ppc64_reloc_type r_type;
2366 bfd_size_type octets;
2367 /* Assume 'at' branch hints. */
2368 bfd_boolean is_isa_v2 = TRUE;
2369
2370 /* If this is a relocatable link (output_bfd test tells us), just
2371 call the generic function. Any adjustment will be done at final
2372 link time. */
2373 if (output_bfd != NULL)
2374 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2375 input_section, output_bfd, error_message);
2376
2377 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2378 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2379 insn &= ~(0x01 << 21);
2380 r_type = reloc_entry->howto->type;
2381 if (r_type == R_PPC64_ADDR14_BRTAKEN
2382 || r_type == R_PPC64_REL14_BRTAKEN)
2383 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
2384
2385 if (is_isa_v2)
2386 {
2387 /* Set 'a' bit. This is 0b00010 in BO field for branch
2388 on CR(BI) insns (BO == 001at or 011at), and 0b01000
2389 for branch on CTR insns (BO == 1a00t or 1a01t). */
2390 if ((insn & (0x14 << 21)) == (0x04 << 21))
2391 insn |= 0x02 << 21;
2392 else if ((insn & (0x14 << 21)) == (0x10 << 21))
2393 insn |= 0x08 << 21;
2394 else
2395 goto out;
2396 }
2397 else
2398 {
2399 bfd_vma target = 0;
2400 bfd_vma from;
2401
2402 if (!bfd_is_com_section (symbol->section))
2403 target = symbol->value;
2404 target += symbol->section->output_section->vma;
2405 target += symbol->section->output_offset;
2406 target += reloc_entry->addend;
2407
2408 from = (reloc_entry->address
2409 + input_section->output_offset
2410 + input_section->output_section->vma);
2411
2412 /* Invert 'y' bit if not the default. */
2413 if ((bfd_signed_vma) (target - from) < 0)
2414 insn ^= 0x01 << 21;
2415 }
2416 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2417 out:
2418 return ppc64_elf_branch_reloc (abfd, reloc_entry, symbol, data,
2419 input_section, output_bfd, error_message);
2420 }
2421
2422 static bfd_reloc_status_type
2423 ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2424 void *data, asection *input_section,
2425 bfd *output_bfd, char **error_message)
2426 {
2427 /* If this is a relocatable link (output_bfd test tells us), just
2428 call the generic function. Any adjustment will be done at final
2429 link time. */
2430 if (output_bfd != NULL)
2431 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2432 input_section, output_bfd, error_message);
2433
2434 /* Subtract the symbol section base address. */
2435 reloc_entry->addend -= symbol->section->output_section->vma;
2436 return bfd_reloc_continue;
2437 }
2438
2439 static bfd_reloc_status_type
2440 ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2441 void *data, asection *input_section,
2442 bfd *output_bfd, char **error_message)
2443 {
2444 /* If this is a relocatable link (output_bfd test tells us), just
2445 call the generic function. Any adjustment will be done at final
2446 link time. */
2447 if (output_bfd != NULL)
2448 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2449 input_section, output_bfd, error_message);
2450
2451 /* Subtract the symbol section base address. */
2452 reloc_entry->addend -= symbol->section->output_section->vma;
2453
2454 /* Adjust the addend for sign extension of the low 16 bits. */
2455 reloc_entry->addend += 0x8000;
2456 return bfd_reloc_continue;
2457 }
2458
2459 static bfd_reloc_status_type
2460 ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2461 void *data, asection *input_section,
2462 bfd *output_bfd, char **error_message)
2463 {
2464 bfd_vma TOCstart;
2465
2466 /* If this is a relocatable link (output_bfd test tells us), just
2467 call the generic function. Any adjustment will be done at final
2468 link time. */
2469 if (output_bfd != NULL)
2470 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2471 input_section, output_bfd, error_message);
2472
2473 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2474 if (TOCstart == 0)
2475 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2476
2477 /* Subtract the TOC base address. */
2478 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2479 return bfd_reloc_continue;
2480 }
2481
2482 static bfd_reloc_status_type
2483 ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2484 void *data, asection *input_section,
2485 bfd *output_bfd, char **error_message)
2486 {
2487 bfd_vma TOCstart;
2488
2489 /* If this is a relocatable link (output_bfd test tells us), just
2490 call the generic function. Any adjustment will be done at final
2491 link time. */
2492 if (output_bfd != NULL)
2493 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2494 input_section, output_bfd, error_message);
2495
2496 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2497 if (TOCstart == 0)
2498 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2499
2500 /* Subtract the TOC base address. */
2501 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2502
2503 /* Adjust the addend for sign extension of the low 16 bits. */
2504 reloc_entry->addend += 0x8000;
2505 return bfd_reloc_continue;
2506 }
2507
2508 static bfd_reloc_status_type
2509 ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2510 void *data, asection *input_section,
2511 bfd *output_bfd, char **error_message)
2512 {
2513 bfd_vma TOCstart;
2514 bfd_size_type octets;
2515
2516 /* If this is a relocatable link (output_bfd test tells us), just
2517 call the generic function. Any adjustment will be done at final
2518 link time. */
2519 if (output_bfd != NULL)
2520 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2521 input_section, output_bfd, error_message);
2522
2523 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2524 if (TOCstart == 0)
2525 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2526
2527 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2528 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
2529 return bfd_reloc_ok;
2530 }
2531
2532 static bfd_reloc_status_type
2533 ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2534 void *data, asection *input_section,
2535 bfd *output_bfd, char **error_message)
2536 {
2537 /* If this is a relocatable link (output_bfd test tells us), just
2538 call the generic function. Any adjustment will be done at final
2539 link time. */
2540 if (output_bfd != NULL)
2541 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2542 input_section, output_bfd, error_message);
2543
2544 if (error_message != NULL)
2545 {
2546 static char buf[60];
2547 sprintf (buf, "generic linker can't handle %s",
2548 reloc_entry->howto->name);
2549 *error_message = buf;
2550 }
2551 return bfd_reloc_dangerous;
2552 }
2553
2554 /* Track GOT entries needed for a given symbol. We might need more
2555 than one got entry per symbol. */
2556 struct got_entry
2557 {
2558 struct got_entry *next;
2559
2560 /* The symbol addend that we'll be placing in the GOT. */
2561 bfd_vma addend;
2562
2563 /* Unlike other ELF targets, we use separate GOT entries for the same
2564 symbol referenced from different input files. This is to support
2565 automatic multiple TOC/GOT sections, where the TOC base can vary
2566 from one input file to another. After partitioning into TOC groups
2567 we merge entries within the group.
2568
2569 Point to the BFD owning this GOT entry. */
2570 bfd *owner;
2571
2572 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
2573 TLS_TPREL or TLS_DTPREL for tls entries. */
2574 unsigned char tls_type;
2575
2576 /* Non-zero if got.ent points to real entry. */
2577 unsigned char is_indirect;
2578
2579 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
2580 union
2581 {
2582 bfd_signed_vma refcount;
2583 bfd_vma offset;
2584 struct got_entry *ent;
2585 } got;
2586 };
2587
2588 /* The same for PLT. */
2589 struct plt_entry
2590 {
2591 struct plt_entry *next;
2592
2593 bfd_vma addend;
2594
2595 union
2596 {
2597 bfd_signed_vma refcount;
2598 bfd_vma offset;
2599 } plt;
2600 };
2601
2602 struct ppc64_elf_obj_tdata
2603 {
2604 struct elf_obj_tdata elf;
2605
2606 /* Shortcuts to dynamic linker sections. */
2607 asection *got;
2608 asection *relgot;
2609
2610 /* Used during garbage collection. We attach global symbols defined
2611 on removed .opd entries to this section so that the sym is removed. */
2612 asection *deleted_section;
2613
2614 /* TLS local dynamic got entry handling. Support for multiple GOT
2615 sections means we potentially need one of these for each input bfd. */
2616 struct got_entry tlsld_got;
2617
2618 /* A copy of relocs before they are modified for --emit-relocs. */
2619 Elf_Internal_Rela *opd_relocs;
2620
2621 /* Nonzero if this bfd has small toc/got relocs, ie. that expect
2622 the reloc to be in the range -32768 to 32767. */
2623 unsigned int has_small_toc_reloc : 1;
2624
2625 /* Set if toc/got ha relocs detected not using r2, or lo reloc
2626 instruction not one we handle. */
2627 unsigned int unexpected_toc_insn : 1;
2628 };
2629
2630 #define ppc64_elf_tdata(bfd) \
2631 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
2632
2633 #define ppc64_tlsld_got(bfd) \
2634 (&ppc64_elf_tdata (bfd)->tlsld_got)
2635
2636 #define is_ppc64_elf(bfd) \
2637 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2638 && elf_object_id (bfd) == PPC64_ELF_DATA)
2639
2640 /* Override the generic function because we store some extras. */
2641
2642 static bfd_boolean
2643 ppc64_elf_mkobject (bfd *abfd)
2644 {
2645 return bfd_elf_allocate_object (abfd, sizeof (struct ppc64_elf_obj_tdata),
2646 PPC64_ELF_DATA);
2647 }
2648
2649 /* Fix bad default arch selected for a 64 bit input bfd when the
2650 default is 32 bit. */
2651
2652 static bfd_boolean
2653 ppc64_elf_object_p (bfd *abfd)
2654 {
2655 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 32)
2656 {
2657 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2658
2659 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2660 {
2661 /* Relies on arch after 32 bit default being 64 bit default. */
2662 abfd->arch_info = abfd->arch_info->next;
2663 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2664 }
2665 }
2666 return TRUE;
2667 }
2668
2669 /* Support for core dump NOTE sections. */
2670
2671 static bfd_boolean
2672 ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2673 {
2674 size_t offset, size;
2675
2676 if (note->descsz != 504)
2677 return FALSE;
2678
2679 /* pr_cursig */
2680 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
2681
2682 /* pr_pid */
2683 elf_tdata (abfd)->core_lwpid = bfd_get_32 (abfd, note->descdata + 32);
2684
2685 /* pr_reg */
2686 offset = 112;
2687 size = 384;
2688
2689 /* Make a ".reg/999" section. */
2690 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2691 size, note->descpos + offset);
2692 }
2693
2694 static bfd_boolean
2695 ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2696 {
2697 if (note->descsz != 136)
2698 return FALSE;
2699
2700 elf_tdata (abfd)->core_pid
2701 = bfd_get_32 (abfd, note->descdata + 24);
2702 elf_tdata (abfd)->core_program
2703 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
2704 elf_tdata (abfd)->core_command
2705 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
2706
2707 return TRUE;
2708 }
2709
2710 static char *
2711 ppc64_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type,
2712 ...)
2713 {
2714 switch (note_type)
2715 {
2716 default:
2717 return NULL;
2718
2719 case NT_PRPSINFO:
2720 {
2721 char data[136];
2722 va_list ap;
2723
2724 va_start (ap, note_type);
2725 memset (data, 0, sizeof (data));
2726 strncpy (data + 40, va_arg (ap, const char *), 16);
2727 strncpy (data + 56, va_arg (ap, const char *), 80);
2728 va_end (ap);
2729 return elfcore_write_note (abfd, buf, bufsiz,
2730 "CORE", note_type, data, sizeof (data));
2731 }
2732
2733 case NT_PRSTATUS:
2734 {
2735 char data[504];
2736 va_list ap;
2737 long pid;
2738 int cursig;
2739 const void *greg;
2740
2741 va_start (ap, note_type);
2742 memset (data, 0, 112);
2743 pid = va_arg (ap, long);
2744 bfd_put_32 (abfd, pid, data + 32);
2745 cursig = va_arg (ap, int);
2746 bfd_put_16 (abfd, cursig, data + 12);
2747 greg = va_arg (ap, const void *);
2748 memcpy (data + 112, greg, 384);
2749 memset (data + 496, 0, 8);
2750 va_end (ap);
2751 return elfcore_write_note (abfd, buf, bufsiz,
2752 "CORE", note_type, data, sizeof (data));
2753 }
2754 }
2755 }
2756
2757 /* Add extra PPC sections. */
2758
2759 static const struct bfd_elf_special_section ppc64_elf_special_sections[]=
2760 {
2761 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, 0 },
2762 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2763 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2764 { STRING_COMMA_LEN (".toc"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2765 { STRING_COMMA_LEN (".toc1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2766 { STRING_COMMA_LEN (".tocbss"), 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2767 { NULL, 0, 0, 0, 0 }
2768 };
2769
2770 enum _ppc64_sec_type {
2771 sec_normal = 0,
2772 sec_opd = 1,
2773 sec_toc = 2
2774 };
2775
2776 struct _ppc64_elf_section_data
2777 {
2778 struct bfd_elf_section_data elf;
2779
2780 union
2781 {
2782 /* An array with one entry for each opd function descriptor. */
2783 struct _opd_sec_data
2784 {
2785 /* Points to the function code section for local opd entries. */
2786 asection **func_sec;
2787
2788 /* After editing .opd, adjust references to opd local syms. */
2789 long *adjust;
2790 } opd;
2791
2792 /* An array for toc sections, indexed by offset/8. */
2793 struct _toc_sec_data
2794 {
2795 /* Specifies the relocation symbol index used at a given toc offset. */
2796 unsigned *symndx;
2797
2798 /* And the relocation addend. */
2799 bfd_vma *add;
2800 } toc;
2801 } u;
2802
2803 enum _ppc64_sec_type sec_type:2;
2804
2805 /* Flag set when small branches are detected. Used to
2806 select suitable defaults for the stub group size. */
2807 unsigned int has_14bit_branch:1;
2808 };
2809
2810 #define ppc64_elf_section_data(sec) \
2811 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
2812
2813 static bfd_boolean
2814 ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
2815 {
2816 if (!sec->used_by_bfd)
2817 {
2818 struct _ppc64_elf_section_data *sdata;
2819 bfd_size_type amt = sizeof (*sdata);
2820
2821 sdata = bfd_zalloc (abfd, amt);
2822 if (sdata == NULL)
2823 return FALSE;
2824 sec->used_by_bfd = sdata;
2825 }
2826
2827 return _bfd_elf_new_section_hook (abfd, sec);
2828 }
2829
2830 static struct _opd_sec_data *
2831 get_opd_info (asection * sec)
2832 {
2833 if (sec != NULL
2834 && ppc64_elf_section_data (sec) != NULL
2835 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
2836 return &ppc64_elf_section_data (sec)->u.opd;
2837 return NULL;
2838 }
2839 \f
2840 /* Parameters for the qsort hook. */
2841 static bfd_boolean synthetic_relocatable;
2842
2843 /* qsort comparison function for ppc64_elf_get_synthetic_symtab. */
2844
2845 static int
2846 compare_symbols (const void *ap, const void *bp)
2847 {
2848 const asymbol *a = * (const asymbol **) ap;
2849 const asymbol *b = * (const asymbol **) bp;
2850
2851 /* Section symbols first. */
2852 if ((a->flags & BSF_SECTION_SYM) && !(b->flags & BSF_SECTION_SYM))
2853 return -1;
2854 if (!(a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM))
2855 return 1;
2856
2857 /* then .opd symbols. */
2858 if (strcmp (a->section->name, ".opd") == 0
2859 && strcmp (b->section->name, ".opd") != 0)
2860 return -1;
2861 if (strcmp (a->section->name, ".opd") != 0
2862 && strcmp (b->section->name, ".opd") == 0)
2863 return 1;
2864
2865 /* then other code symbols. */
2866 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2867 == (SEC_CODE | SEC_ALLOC)
2868 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2869 != (SEC_CODE | SEC_ALLOC))
2870 return -1;
2871
2872 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2873 != (SEC_CODE | SEC_ALLOC)
2874 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2875 == (SEC_CODE | SEC_ALLOC))
2876 return 1;
2877
2878 if (synthetic_relocatable)
2879 {
2880 if (a->section->id < b->section->id)
2881 return -1;
2882
2883 if (a->section->id > b->section->id)
2884 return 1;
2885 }
2886
2887 if (a->value + a->section->vma < b->value + b->section->vma)
2888 return -1;
2889
2890 if (a->value + a->section->vma > b->value + b->section->vma)
2891 return 1;
2892
2893 /* For syms with the same value, prefer strong dynamic global function
2894 syms over other syms. */
2895 if ((a->flags & BSF_GLOBAL) != 0 && (b->flags & BSF_GLOBAL) == 0)
2896 return -1;
2897
2898 if ((a->flags & BSF_GLOBAL) == 0 && (b->flags & BSF_GLOBAL) != 0)
2899 return 1;
2900
2901 if ((a->flags & BSF_FUNCTION) != 0 && (b->flags & BSF_FUNCTION) == 0)
2902 return -1;
2903
2904 if ((a->flags & BSF_FUNCTION) == 0 && (b->flags & BSF_FUNCTION) != 0)
2905 return 1;
2906
2907 if ((a->flags & BSF_WEAK) == 0 && (b->flags & BSF_WEAK) != 0)
2908 return -1;
2909
2910 if ((a->flags & BSF_WEAK) != 0 && (b->flags & BSF_WEAK) == 0)
2911 return 1;
2912
2913 if ((a->flags & BSF_DYNAMIC) != 0 && (b->flags & BSF_DYNAMIC) == 0)
2914 return -1;
2915
2916 if ((a->flags & BSF_DYNAMIC) == 0 && (b->flags & BSF_DYNAMIC) != 0)
2917 return 1;
2918
2919 return 0;
2920 }
2921
2922 /* Search SYMS for a symbol of the given VALUE. */
2923
2924 static asymbol *
2925 sym_exists_at (asymbol **syms, long lo, long hi, int id, bfd_vma value)
2926 {
2927 long mid;
2928
2929 if (id == -1)
2930 {
2931 while (lo < hi)
2932 {
2933 mid = (lo + hi) >> 1;
2934 if (syms[mid]->value + syms[mid]->section->vma < value)
2935 lo = mid + 1;
2936 else if (syms[mid]->value + syms[mid]->section->vma > value)
2937 hi = mid;
2938 else
2939 return syms[mid];
2940 }
2941 }
2942 else
2943 {
2944 while (lo < hi)
2945 {
2946 mid = (lo + hi) >> 1;
2947 if (syms[mid]->section->id < id)
2948 lo = mid + 1;
2949 else if (syms[mid]->section->id > id)
2950 hi = mid;
2951 else if (syms[mid]->value < value)
2952 lo = mid + 1;
2953 else if (syms[mid]->value > value)
2954 hi = mid;
2955 else
2956 return syms[mid];
2957 }
2958 }
2959 return NULL;
2960 }
2961
2962 static bfd_boolean
2963 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
2964 {
2965 bfd_vma vma = *(bfd_vma *) ptr;
2966 return ((section->flags & SEC_ALLOC) != 0
2967 && section->vma <= vma
2968 && vma < section->vma + section->size);
2969 }
2970
2971 /* Create synthetic symbols, effectively restoring "dot-symbol" function
2972 entry syms. Also generate @plt symbols for the glink branch table. */
2973
2974 static long
2975 ppc64_elf_get_synthetic_symtab (bfd *abfd,
2976 long static_count, asymbol **static_syms,
2977 long dyn_count, asymbol **dyn_syms,
2978 asymbol **ret)
2979 {
2980 asymbol *s;
2981 long i;
2982 long count;
2983 char *names;
2984 long symcount, codesecsym, codesecsymend, secsymend, opdsymend;
2985 asection *opd;
2986 bfd_boolean relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0;
2987 asymbol **syms;
2988
2989 *ret = NULL;
2990
2991 opd = bfd_get_section_by_name (abfd, ".opd");
2992 if (opd == NULL)
2993 return 0;
2994
2995 symcount = static_count;
2996 if (!relocatable)
2997 symcount += dyn_count;
2998 if (symcount == 0)
2999 return 0;
3000
3001 syms = bfd_malloc ((symcount + 1) * sizeof (*syms));
3002 if (syms == NULL)
3003 return -1;
3004
3005 if (!relocatable && static_count != 0 && dyn_count != 0)
3006 {
3007 /* Use both symbol tables. */
3008 memcpy (syms, static_syms, static_count * sizeof (*syms));
3009 memcpy (syms + static_count, dyn_syms, (dyn_count + 1) * sizeof (*syms));
3010 }
3011 else if (!relocatable && static_count == 0)
3012 memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms));
3013 else
3014 memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms));
3015
3016 synthetic_relocatable = relocatable;
3017 qsort (syms, symcount, sizeof (*syms), compare_symbols);
3018
3019 if (!relocatable && symcount > 1)
3020 {
3021 long j;
3022 /* Trim duplicate syms, since we may have merged the normal and
3023 dynamic symbols. Actually, we only care about syms that have
3024 different values, so trim any with the same value. */
3025 for (i = 1, j = 1; i < symcount; ++i)
3026 if (syms[i - 1]->value + syms[i - 1]->section->vma
3027 != syms[i]->value + syms[i]->section->vma)
3028 syms[j++] = syms[i];
3029 symcount = j;
3030 }
3031
3032 i = 0;
3033 if (strcmp (syms[i]->section->name, ".opd") == 0)
3034 ++i;
3035 codesecsym = i;
3036
3037 for (; i < symcount; ++i)
3038 if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3039 != (SEC_CODE | SEC_ALLOC))
3040 || (syms[i]->flags & BSF_SECTION_SYM) == 0)
3041 break;
3042 codesecsymend = i;
3043
3044 for (; i < symcount; ++i)
3045 if ((syms[i]->flags & BSF_SECTION_SYM) == 0)
3046 break;
3047 secsymend = i;
3048
3049 for (; i < symcount; ++i)
3050 if (strcmp (syms[i]->section->name, ".opd") != 0)
3051 break;
3052 opdsymend = i;
3053
3054 for (; i < symcount; ++i)
3055 if ((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3056 != (SEC_CODE | SEC_ALLOC))
3057 break;
3058 symcount = i;
3059
3060 count = 0;
3061
3062 if (relocatable)
3063 {
3064 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3065 arelent *r;
3066 size_t size;
3067 long relcount;
3068
3069 if (opdsymend == secsymend)
3070 goto done;
3071
3072 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3073 relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0;
3074 if (relcount == 0)
3075 goto done;
3076
3077 if (!(*slurp_relocs) (abfd, opd, static_syms, FALSE))
3078 {
3079 count = -1;
3080 goto done;
3081 }
3082
3083 size = 0;
3084 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3085 {
3086 asymbol *sym;
3087
3088 while (r < opd->relocation + relcount
3089 && r->address < syms[i]->value + opd->vma)
3090 ++r;
3091
3092 if (r == opd->relocation + relcount)
3093 break;
3094
3095 if (r->address != syms[i]->value + opd->vma)
3096 continue;
3097
3098 if (r->howto->type != R_PPC64_ADDR64)
3099 continue;
3100
3101 sym = *r->sym_ptr_ptr;
3102 if (!sym_exists_at (syms, opdsymend, symcount,
3103 sym->section->id, sym->value + r->addend))
3104 {
3105 ++count;
3106 size += sizeof (asymbol);
3107 size += strlen (syms[i]->name) + 2;
3108 }
3109 }
3110
3111 s = *ret = bfd_malloc (size);
3112 if (s == NULL)
3113 {
3114 count = -1;
3115 goto done;
3116 }
3117
3118 names = (char *) (s + count);
3119
3120 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3121 {
3122 asymbol *sym;
3123
3124 while (r < opd->relocation + relcount
3125 && r->address < syms[i]->value + opd->vma)
3126 ++r;
3127
3128 if (r == opd->relocation + relcount)
3129 break;
3130
3131 if (r->address != syms[i]->value + opd->vma)
3132 continue;
3133
3134 if (r->howto->type != R_PPC64_ADDR64)
3135 continue;
3136
3137 sym = *r->sym_ptr_ptr;
3138 if (!sym_exists_at (syms, opdsymend, symcount,
3139 sym->section->id, sym->value + r->addend))
3140 {
3141 size_t len;
3142
3143 *s = *syms[i];
3144 s->flags |= BSF_SYNTHETIC;
3145 s->section = sym->section;
3146 s->value = sym->value + r->addend;
3147 s->name = names;
3148 *names++ = '.';
3149 len = strlen (syms[i]->name);
3150 memcpy (names, syms[i]->name, len + 1);
3151 names += len + 1;
3152 /* Have udata.p point back to the original symbol this
3153 synthetic symbol was derived from. */
3154 s->udata.p = syms[i];
3155 s++;
3156 }
3157 }
3158 }
3159 else
3160 {
3161 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3162 bfd_byte *contents;
3163 size_t size;
3164 long plt_count = 0;
3165 bfd_vma glink_vma = 0, resolv_vma = 0;
3166 asection *dynamic, *glink = NULL, *relplt = NULL;
3167 arelent *p;
3168
3169 if (!bfd_malloc_and_get_section (abfd, opd, &contents))
3170 {
3171 if (contents)
3172 {
3173 free_contents_and_exit:
3174 free (contents);
3175 }
3176 count = -1;
3177 goto done;
3178 }
3179
3180 size = 0;
3181 for (i = secsymend; i < opdsymend; ++i)
3182 {
3183 bfd_vma ent;
3184
3185 /* Ignore bogus symbols. */
3186 if (syms[i]->value > opd->size - 8)
3187 continue;
3188
3189 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3190 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3191 {
3192 ++count;
3193 size += sizeof (asymbol);
3194 size += strlen (syms[i]->name) + 2;
3195 }
3196 }
3197
3198 /* Get start of .glink stubs from DT_PPC64_GLINK. */
3199 if (dyn_count != 0
3200 && (dynamic = bfd_get_section_by_name (abfd, ".dynamic")) != NULL)
3201 {
3202 bfd_byte *dynbuf, *extdyn, *extdynend;
3203 size_t extdynsize;
3204 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
3205
3206 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
3207 goto free_contents_and_exit;
3208
3209 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
3210 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
3211
3212 extdyn = dynbuf;
3213 extdynend = extdyn + dynamic->size;
3214 for (; extdyn < extdynend; extdyn += extdynsize)
3215 {
3216 Elf_Internal_Dyn dyn;
3217 (*swap_dyn_in) (abfd, extdyn, &dyn);
3218
3219 if (dyn.d_tag == DT_NULL)
3220 break;
3221
3222 if (dyn.d_tag == DT_PPC64_GLINK)
3223 {
3224 /* The first glink stub starts at offset 32; see comment in
3225 ppc64_elf_finish_dynamic_sections. */
3226 glink_vma = dyn.d_un.d_val + 32;
3227 /* The .glink section usually does not survive the final
3228 link; search for the section (usually .text) where the
3229 glink stubs now reside. */
3230 glink = bfd_sections_find_if (abfd, section_covers_vma,
3231 &glink_vma);
3232 break;
3233 }
3234 }
3235
3236 free (dynbuf);
3237 }
3238
3239 if (glink != NULL)
3240 {
3241 /* Determine __glink trampoline by reading the relative branch
3242 from the first glink stub. */
3243 bfd_byte buf[4];
3244 if (bfd_get_section_contents (abfd, glink, buf,
3245 glink_vma + 4 - glink->vma, 4))
3246 {
3247 unsigned int insn = bfd_get_32 (abfd, buf);
3248 insn ^= B_DOT;
3249 if ((insn & ~0x3fffffc) == 0)
3250 resolv_vma = glink_vma + 4 + (insn ^ 0x2000000) - 0x2000000;
3251 }
3252
3253 if (resolv_vma)
3254 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
3255
3256 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
3257 if (relplt != NULL)
3258 {
3259 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3260 if (! (*slurp_relocs) (abfd, relplt, dyn_syms, TRUE))
3261 goto free_contents_and_exit;
3262
3263 plt_count = relplt->size / sizeof (Elf64_External_Rela);
3264 size += plt_count * sizeof (asymbol);
3265
3266 p = relplt->relocation;
3267 for (i = 0; i < plt_count; i++, p++)
3268 {
3269 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
3270 if (p->addend != 0)
3271 size += sizeof ("+0x") - 1 + 16;
3272 }
3273 }
3274 }
3275
3276 s = *ret = bfd_malloc (size);
3277 if (s == NULL)
3278 goto free_contents_and_exit;
3279
3280 names = (char *) (s + count + plt_count + (resolv_vma != 0));
3281
3282 for (i = secsymend; i < opdsymend; ++i)
3283 {
3284 bfd_vma ent;
3285
3286 if (syms[i]->value > opd->size - 8)
3287 continue;
3288
3289 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3290 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3291 {
3292 long lo, hi;
3293 size_t len;
3294 asection *sec = abfd->sections;
3295
3296 *s = *syms[i];
3297 lo = codesecsym;
3298 hi = codesecsymend;
3299 while (lo < hi)
3300 {
3301 long mid = (lo + hi) >> 1;
3302 if (syms[mid]->section->vma < ent)
3303 lo = mid + 1;
3304 else if (syms[mid]->section->vma > ent)
3305 hi = mid;
3306 else
3307 {
3308 sec = syms[mid]->section;
3309 break;
3310 }
3311 }
3312
3313 if (lo >= hi && lo > codesecsym)
3314 sec = syms[lo - 1]->section;
3315
3316 for (; sec != NULL; sec = sec->next)
3317 {
3318 if (sec->vma > ent)
3319 break;
3320 /* SEC_LOAD may not be set if SEC is from a separate debug
3321 info file. */
3322 if ((sec->flags & SEC_ALLOC) == 0)
3323 break;
3324 if ((sec->flags & SEC_CODE) != 0)
3325 s->section = sec;
3326 }
3327 s->flags |= BSF_SYNTHETIC;
3328 s->value = ent - s->section->vma;
3329 s->name = names;
3330 *names++ = '.';
3331 len = strlen (syms[i]->name);
3332 memcpy (names, syms[i]->name, len + 1);
3333 names += len + 1;
3334 /* Have udata.p point back to the original symbol this
3335 synthetic symbol was derived from. */
3336 s->udata.p = syms[i];
3337 s++;
3338 }
3339 }
3340 free (contents);
3341
3342 if (glink != NULL && relplt != NULL)
3343 {
3344 if (resolv_vma)
3345 {
3346 /* Add a symbol for the main glink trampoline. */
3347 memset (s, 0, sizeof *s);
3348 s->the_bfd = abfd;
3349 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3350 s->section = glink;
3351 s->value = resolv_vma - glink->vma;
3352 s->name = names;
3353 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3354 names += sizeof ("__glink_PLTresolve");
3355 s++;
3356 count++;
3357 }
3358
3359 /* FIXME: It would be very much nicer to put sym@plt on the
3360 stub rather than on the glink branch table entry. The
3361 objdump disassembler would then use a sensible symbol
3362 name on plt calls. The difficulty in doing so is
3363 a) finding the stubs, and,
3364 b) matching stubs against plt entries, and,
3365 c) there can be multiple stubs for a given plt entry.
3366
3367 Solving (a) could be done by code scanning, but older
3368 ppc64 binaries used different stubs to current code.
3369 (b) is the tricky one since you need to known the toc
3370 pointer for at least one function that uses a pic stub to
3371 be able to calculate the plt address referenced.
3372 (c) means gdb would need to set multiple breakpoints (or
3373 find the glink branch itself) when setting breakpoints
3374 for pending shared library loads. */
3375 p = relplt->relocation;
3376 for (i = 0; i < plt_count; i++, p++)
3377 {
3378 size_t len;
3379
3380 *s = **p->sym_ptr_ptr;
3381 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
3382 we are defining a symbol, ensure one of them is set. */
3383 if ((s->flags & BSF_LOCAL) == 0)
3384 s->flags |= BSF_GLOBAL;
3385 s->flags |= BSF_SYNTHETIC;
3386 s->section = glink;
3387 s->value = glink_vma - glink->vma;
3388 s->name = names;
3389 s->udata.p = NULL;
3390 len = strlen ((*p->sym_ptr_ptr)->name);
3391 memcpy (names, (*p->sym_ptr_ptr)->name, len);
3392 names += len;
3393 if (p->addend != 0)
3394 {
3395 memcpy (names, "+0x", sizeof ("+0x") - 1);
3396 names += sizeof ("+0x") - 1;
3397 bfd_sprintf_vma (abfd, names, p->addend);
3398 names += strlen (names);
3399 }
3400 memcpy (names, "@plt", sizeof ("@plt"));
3401 names += sizeof ("@plt");
3402 s++;
3403 glink_vma += 8;
3404 if (i >= 0x8000)
3405 glink_vma += 4;
3406 }
3407 count += plt_count;
3408 }
3409 }
3410
3411 done:
3412 free (syms);
3413 return count;
3414 }
3415 \f
3416 /* The following functions are specific to the ELF linker, while
3417 functions above are used generally. Those named ppc64_elf_* are
3418 called by the main ELF linker code. They appear in this file more
3419 or less in the order in which they are called. eg.
3420 ppc64_elf_check_relocs is called early in the link process,
3421 ppc64_elf_finish_dynamic_sections is one of the last functions
3422 called.
3423
3424 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
3425 functions have both a function code symbol and a function descriptor
3426 symbol. A call to foo in a relocatable object file looks like:
3427
3428 . .text
3429 . x:
3430 . bl .foo
3431 . nop
3432
3433 The function definition in another object file might be:
3434
3435 . .section .opd
3436 . foo: .quad .foo
3437 . .quad .TOC.@tocbase
3438 . .quad 0
3439 .
3440 . .text
3441 . .foo: blr
3442
3443 When the linker resolves the call during a static link, the branch
3444 unsurprisingly just goes to .foo and the .opd information is unused.
3445 If the function definition is in a shared library, things are a little
3446 different: The call goes via a plt call stub, the opd information gets
3447 copied to the plt, and the linker patches the nop.
3448
3449 . x:
3450 . bl .foo_stub
3451 . ld 2,40(1)
3452 .
3453 .
3454 . .foo_stub:
3455 . addis 12,2,Lfoo@toc@ha # in practice, the call stub
3456 . addi 12,12,Lfoo@toc@l # is slightly optimized, but
3457 . std 2,40(1) # this is the general idea
3458 . ld 11,0(12)
3459 . ld 2,8(12)
3460 . mtctr 11
3461 . ld 11,16(12)
3462 . bctr
3463 .
3464 . .section .plt
3465 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
3466
3467 The "reloc ()" notation is supposed to indicate that the linker emits
3468 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
3469 copying.
3470
3471 What are the difficulties here? Well, firstly, the relocations
3472 examined by the linker in check_relocs are against the function code
3473 sym .foo, while the dynamic relocation in the plt is emitted against
3474 the function descriptor symbol, foo. Somewhere along the line, we need
3475 to carefully copy dynamic link information from one symbol to the other.
3476 Secondly, the generic part of the elf linker will make .foo a dynamic
3477 symbol as is normal for most other backends. We need foo dynamic
3478 instead, at least for an application final link. However, when
3479 creating a shared library containing foo, we need to have both symbols
3480 dynamic so that references to .foo are satisfied during the early
3481 stages of linking. Otherwise the linker might decide to pull in a
3482 definition from some other object, eg. a static library.
3483
3484 Update: As of August 2004, we support a new convention. Function
3485 calls may use the function descriptor symbol, ie. "bl foo". This
3486 behaves exactly as "bl .foo". */
3487
3488 /* Of those relocs that might be copied as dynamic relocs, this function
3489 selects those that must be copied when linking a shared library,
3490 even when the symbol is local. */
3491
3492 static int
3493 must_be_dyn_reloc (struct bfd_link_info *info,
3494 enum elf_ppc64_reloc_type r_type)
3495 {
3496 switch (r_type)
3497 {
3498 default:
3499 return 1;
3500
3501 case R_PPC64_REL32:
3502 case R_PPC64_REL64:
3503 case R_PPC64_REL30:
3504 return 0;
3505
3506 case R_PPC64_TPREL16:
3507 case R_PPC64_TPREL16_LO:
3508 case R_PPC64_TPREL16_HI:
3509 case R_PPC64_TPREL16_HA:
3510 case R_PPC64_TPREL16_DS:
3511 case R_PPC64_TPREL16_LO_DS:
3512 case R_PPC64_TPREL16_HIGHER:
3513 case R_PPC64_TPREL16_HIGHERA:
3514 case R_PPC64_TPREL16_HIGHEST:
3515 case R_PPC64_TPREL16_HIGHESTA:
3516 case R_PPC64_TPREL64:
3517 return !info->executable;
3518 }
3519 }
3520
3521 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3522 copying dynamic variables from a shared lib into an app's dynbss
3523 section, and instead use a dynamic relocation to point into the
3524 shared lib. With code that gcc generates, it's vital that this be
3525 enabled; In the PowerPC64 ABI, the address of a function is actually
3526 the address of a function descriptor, which resides in the .opd
3527 section. gcc uses the descriptor directly rather than going via the
3528 GOT as some other ABI's do, which means that initialized function
3529 pointers must reference the descriptor. Thus, a function pointer
3530 initialized to the address of a function in a shared library will
3531 either require a copy reloc, or a dynamic reloc. Using a copy reloc
3532 redefines the function descriptor symbol to point to the copy. This
3533 presents a problem as a plt entry for that function is also
3534 initialized from the function descriptor symbol and the copy reloc
3535 may not be initialized first. */
3536 #define ELIMINATE_COPY_RELOCS 1
3537
3538 /* Section name for stubs is the associated section name plus this
3539 string. */
3540 #define STUB_SUFFIX ".stub"
3541
3542 /* Linker stubs.
3543 ppc_stub_long_branch:
3544 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
3545 destination, but a 24 bit branch in a stub section will reach.
3546 . b dest
3547
3548 ppc_stub_plt_branch:
3549 Similar to the above, but a 24 bit branch in the stub section won't
3550 reach its destination.
3551 . addis %r12,%r2,xxx@toc@ha
3552 . ld %r11,xxx@toc@l(%r12)
3553 . mtctr %r11
3554 . bctr
3555
3556 ppc_stub_plt_call:
3557 Used to call a function in a shared library. If it so happens that
3558 the plt entry referenced crosses a 64k boundary, then an extra
3559 "addi %r12,%r12,xxx@toc@l" will be inserted before the "mtctr".
3560 . addis %r12,%r2,xxx@toc@ha
3561 . std %r2,40(%r1)
3562 . ld %r11,xxx+0@toc@l(%r12)
3563 . mtctr %r11
3564 . ld %r2,xxx+8@toc@l(%r12)
3565 . ld %r11,xxx+16@toc@l(%r12)
3566 . bctr
3567
3568 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
3569 code to adjust the value and save r2 to support multiple toc sections.
3570 A ppc_stub_long_branch with an r2 offset looks like:
3571 . std %r2,40(%r1)
3572 . addis %r2,%r2,off@ha
3573 . addi %r2,%r2,off@l
3574 . b dest
3575
3576 A ppc_stub_plt_branch with an r2 offset looks like:
3577 . std %r2,40(%r1)
3578 . addis %r12,%r2,xxx@toc@ha
3579 . ld %r11,xxx@toc@l(%r12)
3580 . addis %r2,%r2,off@ha
3581 . addi %r2,%r2,off@l
3582 . mtctr %r11
3583 . bctr
3584
3585 In cases where the "addis" instruction would add zero, the "addis" is
3586 omitted and following instructions modified slightly in some cases.
3587 */
3588
3589 enum ppc_stub_type {
3590 ppc_stub_none,
3591 ppc_stub_long_branch,
3592 ppc_stub_long_branch_r2off,
3593 ppc_stub_plt_branch,
3594 ppc_stub_plt_branch_r2off,
3595 ppc_stub_plt_call,
3596 ppc_stub_plt_call_r2save
3597 };
3598
3599 struct ppc_stub_hash_entry {
3600
3601 /* Base hash table entry structure. */
3602 struct bfd_hash_entry root;
3603
3604 enum ppc_stub_type stub_type;
3605
3606 /* The stub section. */
3607 asection *stub_sec;
3608
3609 /* Offset within stub_sec of the beginning of this stub. */
3610 bfd_vma stub_offset;
3611
3612 /* Given the symbol's value and its section we can determine its final
3613 value when building the stubs (so the stub knows where to jump. */
3614 bfd_vma target_value;
3615 asection *target_section;
3616
3617 /* The symbol table entry, if any, that this was derived from. */
3618 struct ppc_link_hash_entry *h;
3619 struct plt_entry *plt_ent;
3620
3621 /* And the reloc addend that this was derived from. */
3622 bfd_vma addend;
3623
3624 /* Where this stub is being called from, or, in the case of combined
3625 stub sections, the first input section in the group. */
3626 asection *id_sec;
3627 };
3628
3629 struct ppc_branch_hash_entry {
3630
3631 /* Base hash table entry structure. */
3632 struct bfd_hash_entry root;
3633
3634 /* Offset within branch lookup table. */
3635 unsigned int offset;
3636
3637 /* Generation marker. */
3638 unsigned int iter;
3639 };
3640
3641 struct ppc_link_hash_entry
3642 {
3643 struct elf_link_hash_entry elf;
3644
3645 union {
3646 /* A pointer to the most recently used stub hash entry against this
3647 symbol. */
3648 struct ppc_stub_hash_entry *stub_cache;
3649
3650 /* A pointer to the next symbol starting with a '.' */
3651 struct ppc_link_hash_entry *next_dot_sym;
3652 } u;
3653
3654 /* Track dynamic relocs copied for this symbol. */
3655 struct elf_dyn_relocs *dyn_relocs;
3656
3657 /* Link between function code and descriptor symbols. */
3658 struct ppc_link_hash_entry *oh;
3659
3660 /* Flag function code and descriptor symbols. */
3661 unsigned int is_func:1;
3662 unsigned int is_func_descriptor:1;
3663 unsigned int fake:1;
3664
3665 /* Whether global opd/toc sym has been adjusted or not.
3666 After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
3667 should be set for all globals defined in any opd/toc section. */
3668 unsigned int adjust_done:1;
3669
3670 /* Set if we twiddled this symbol to weak at some stage. */
3671 unsigned int was_undefined:1;
3672
3673 /* Contexts in which symbol is used in the GOT (or TOC).
3674 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
3675 corresponding relocs are encountered during check_relocs.
3676 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3677 indicate the corresponding GOT entry type is not needed.
3678 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
3679 a TPREL one. We use a separate flag rather than setting TPREL
3680 just for convenience in distinguishing the two cases. */
3681 #define TLS_GD 1 /* GD reloc. */
3682 #define TLS_LD 2 /* LD reloc. */
3683 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3684 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3685 #define TLS_TLS 16 /* Any TLS reloc. */
3686 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
3687 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
3688 #define PLT_IFUNC 128 /* STT_GNU_IFUNC. */
3689 unsigned char tls_mask;
3690 };
3691
3692 /* ppc64 ELF linker hash table. */
3693
3694 struct ppc_link_hash_table
3695 {
3696 struct elf_link_hash_table elf;
3697
3698 /* The stub hash table. */
3699 struct bfd_hash_table stub_hash_table;
3700
3701 /* Another hash table for plt_branch stubs. */
3702 struct bfd_hash_table branch_hash_table;
3703
3704 /* Hash table for function prologue tocsave. */
3705 htab_t tocsave_htab;
3706
3707 /* Linker stub bfd. */
3708 bfd *stub_bfd;
3709
3710 /* Linker call-backs. */
3711 asection * (*add_stub_section) (const char *, asection *);
3712 void (*layout_sections_again) (void);
3713
3714 /* Array to keep track of which stub sections have been created, and
3715 information on stub grouping. */
3716 struct map_stub {
3717 /* This is the section to which stubs in the group will be attached. */
3718 asection *link_sec;
3719 /* The stub section. */
3720 asection *stub_sec;
3721 /* Along with elf_gp, specifies the TOC pointer used in this group. */
3722 bfd_vma toc_off;
3723 } *stub_group;
3724
3725 /* Temp used when calculating TOC pointers. */
3726 bfd_vma toc_curr;
3727 bfd *toc_bfd;
3728 asection *toc_first_sec;
3729
3730 /* Highest input section id. */
3731 int top_id;
3732
3733 /* Highest output section index. */
3734 int top_index;
3735
3736 /* Used when adding symbols. */
3737 struct ppc_link_hash_entry *dot_syms;
3738
3739 /* List of input sections for each output section. */
3740 asection **input_list;
3741
3742 /* Short-cuts to get to dynamic linker sections. */
3743 asection *got;
3744 asection *plt;
3745 asection *relplt;
3746 asection *iplt;
3747 asection *reliplt;
3748 asection *dynbss;
3749 asection *relbss;
3750 asection *glink;
3751 asection *sfpr;
3752 asection *brlt;
3753 asection *relbrlt;
3754 asection *glink_eh_frame;
3755
3756 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
3757 struct ppc_link_hash_entry *tls_get_addr;
3758 struct ppc_link_hash_entry *tls_get_addr_fd;
3759
3760 /* The size of reliplt used by got entry relocs. */
3761 bfd_size_type got_reli_size;
3762
3763 /* Statistics. */
3764 unsigned long stub_count[ppc_stub_plt_call_r2save];
3765
3766 /* Number of stubs against global syms. */
3767 unsigned long stub_globals;
3768
3769 /* Alignment of PLT call stubs. */
3770 unsigned int plt_stub_align:4;
3771
3772 /* Set if PLT call stubs should load r11. */
3773 unsigned int plt_static_chain:1;
3774
3775 /* Set if PLT call stubs need a read-read barrier. */
3776 unsigned int plt_thread_safe:1;
3777
3778 /* Set if we should emit symbols for stubs. */
3779 unsigned int emit_stub_syms:1;
3780
3781 /* Set if __tls_get_addr optimization should not be done. */
3782 unsigned int no_tls_get_addr_opt:1;
3783
3784 /* Support for multiple toc sections. */
3785 unsigned int do_multi_toc:1;
3786 unsigned int multi_toc_needed:1;
3787 unsigned int second_toc_pass:1;
3788 unsigned int do_toc_opt:1;
3789
3790 /* Set on error. */
3791 unsigned int stub_error:1;
3792
3793 /* Temp used by ppc64_elf_process_dot_syms. */
3794 unsigned int twiddled_syms:1;
3795
3796 /* Incremented every time we size stubs. */
3797 unsigned int stub_iteration;
3798
3799 /* Small local sym cache. */
3800 struct sym_cache sym_cache;
3801 };
3802
3803 /* Rename some of the generic section flags to better document how they
3804 are used here. */
3805
3806 /* Nonzero if this section has TLS related relocations. */
3807 #define has_tls_reloc sec_flg0
3808
3809 /* Nonzero if this section has a call to __tls_get_addr. */
3810 #define has_tls_get_addr_call sec_flg1
3811
3812 /* Nonzero if this section has any toc or got relocs. */
3813 #define has_toc_reloc sec_flg2
3814
3815 /* Nonzero if this section has a call to another section that uses
3816 the toc or got. */
3817 #define makes_toc_func_call sec_flg3
3818
3819 /* Recursion protection when determining above flag. */
3820 #define call_check_in_progress sec_flg4
3821 #define call_check_done sec_flg5
3822
3823 /* Get the ppc64 ELF linker hash table from a link_info structure. */
3824
3825 #define ppc_hash_table(p) \
3826 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
3827 == PPC64_ELF_DATA ? ((struct ppc_link_hash_table *) ((p)->hash)) : NULL)
3828
3829 #define ppc_stub_hash_lookup(table, string, create, copy) \
3830 ((struct ppc_stub_hash_entry *) \
3831 bfd_hash_lookup ((table), (string), (create), (copy)))
3832
3833 #define ppc_branch_hash_lookup(table, string, create, copy) \
3834 ((struct ppc_branch_hash_entry *) \
3835 bfd_hash_lookup ((table), (string), (create), (copy)))
3836
3837 /* Create an entry in the stub hash table. */
3838
3839 static struct bfd_hash_entry *
3840 stub_hash_newfunc (struct bfd_hash_entry *entry,
3841 struct bfd_hash_table *table,
3842 const char *string)
3843 {
3844 /* Allocate the structure if it has not already been allocated by a
3845 subclass. */
3846 if (entry == NULL)
3847 {
3848 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
3849 if (entry == NULL)
3850 return entry;
3851 }
3852
3853 /* Call the allocation method of the superclass. */
3854 entry = bfd_hash_newfunc (entry, table, string);
3855 if (entry != NULL)
3856 {
3857 struct ppc_stub_hash_entry *eh;
3858
3859 /* Initialize the local fields. */
3860 eh = (struct ppc_stub_hash_entry *) entry;
3861 eh->stub_type = ppc_stub_none;
3862 eh->stub_sec = NULL;
3863 eh->stub_offset = 0;
3864 eh->target_value = 0;
3865 eh->target_section = NULL;
3866 eh->h = NULL;
3867 eh->id_sec = NULL;
3868 }
3869
3870 return entry;
3871 }
3872
3873 /* Create an entry in the branch hash table. */
3874
3875 static struct bfd_hash_entry *
3876 branch_hash_newfunc (struct bfd_hash_entry *entry,
3877 struct bfd_hash_table *table,
3878 const char *string)
3879 {
3880 /* Allocate the structure if it has not already been allocated by a
3881 subclass. */
3882 if (entry == NULL)
3883 {
3884 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
3885 if (entry == NULL)
3886 return entry;
3887 }
3888
3889 /* Call the allocation method of the superclass. */
3890 entry = bfd_hash_newfunc (entry, table, string);
3891 if (entry != NULL)
3892 {
3893 struct ppc_branch_hash_entry *eh;
3894
3895 /* Initialize the local fields. */
3896 eh = (struct ppc_branch_hash_entry *) entry;
3897 eh->offset = 0;
3898 eh->iter = 0;
3899 }
3900
3901 return entry;
3902 }
3903
3904 /* Create an entry in a ppc64 ELF linker hash table. */
3905
3906 static struct bfd_hash_entry *
3907 link_hash_newfunc (struct bfd_hash_entry *entry,
3908 struct bfd_hash_table *table,
3909 const char *string)
3910 {
3911 /* Allocate the structure if it has not already been allocated by a
3912 subclass. */
3913 if (entry == NULL)
3914 {
3915 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
3916 if (entry == NULL)
3917 return entry;
3918 }
3919
3920 /* Call the allocation method of the superclass. */
3921 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
3922 if (entry != NULL)
3923 {
3924 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
3925
3926 memset (&eh->u.stub_cache, 0,
3927 (sizeof (struct ppc_link_hash_entry)
3928 - offsetof (struct ppc_link_hash_entry, u.stub_cache)));
3929
3930 /* When making function calls, old ABI code references function entry
3931 points (dot symbols), while new ABI code references the function
3932 descriptor symbol. We need to make any combination of reference and
3933 definition work together, without breaking archive linking.
3934
3935 For a defined function "foo" and an undefined call to "bar":
3936 An old object defines "foo" and ".foo", references ".bar" (possibly
3937 "bar" too).
3938 A new object defines "foo" and references "bar".
3939
3940 A new object thus has no problem with its undefined symbols being
3941 satisfied by definitions in an old object. On the other hand, the
3942 old object won't have ".bar" satisfied by a new object.
3943
3944 Keep a list of newly added dot-symbols. */
3945
3946 if (string[0] == '.')
3947 {
3948 struct ppc_link_hash_table *htab;
3949
3950 htab = (struct ppc_link_hash_table *) table;
3951 eh->u.next_dot_sym = htab->dot_syms;
3952 htab->dot_syms = eh;
3953 }
3954 }
3955
3956 return entry;
3957 }
3958
3959 struct tocsave_entry {
3960 asection *sec;
3961 bfd_vma offset;
3962 };
3963
3964 static hashval_t
3965 tocsave_htab_hash (const void *p)
3966 {
3967 const struct tocsave_entry *e = (const struct tocsave_entry *) p;
3968 return ((bfd_vma)(intptr_t) e->sec ^ e->offset) >> 3;
3969 }
3970
3971 static int
3972 tocsave_htab_eq (const void *p1, const void *p2)
3973 {
3974 const struct tocsave_entry *e1 = (const struct tocsave_entry *) p1;
3975 const struct tocsave_entry *e2 = (const struct tocsave_entry *) p2;
3976 return e1->sec == e2->sec && e1->offset == e2->offset;
3977 }
3978
3979 /* Create a ppc64 ELF linker hash table. */
3980
3981 static struct bfd_link_hash_table *
3982 ppc64_elf_link_hash_table_create (bfd *abfd)
3983 {
3984 struct ppc_link_hash_table *htab;
3985 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
3986
3987 htab = bfd_zmalloc (amt);
3988 if (htab == NULL)
3989 return NULL;
3990
3991 if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc,
3992 sizeof (struct ppc_link_hash_entry),
3993 PPC64_ELF_DATA))
3994 {
3995 free (htab);
3996 return NULL;
3997 }
3998
3999 /* Init the stub hash table too. */
4000 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc,
4001 sizeof (struct ppc_stub_hash_entry)))
4002 return NULL;
4003
4004 /* And the branch hash table. */
4005 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc,
4006 sizeof (struct ppc_branch_hash_entry)))
4007 return NULL;
4008
4009 htab->tocsave_htab = htab_try_create (1024,
4010 tocsave_htab_hash,
4011 tocsave_htab_eq,
4012 NULL);
4013 if (htab->tocsave_htab == NULL)
4014 return NULL;
4015
4016 /* Initializing two fields of the union is just cosmetic. We really
4017 only care about glist, but when compiled on a 32-bit host the
4018 bfd_vma fields are larger. Setting the bfd_vma to zero makes
4019 debugger inspection of these fields look nicer. */
4020 htab->elf.init_got_refcount.refcount = 0;
4021 htab->elf.init_got_refcount.glist = NULL;
4022 htab->elf.init_plt_refcount.refcount = 0;
4023 htab->elf.init_plt_refcount.glist = NULL;
4024 htab->elf.init_got_offset.offset = 0;
4025 htab->elf.init_got_offset.glist = NULL;
4026 htab->elf.init_plt_offset.offset = 0;
4027 htab->elf.init_plt_offset.glist = NULL;
4028
4029 return &htab->elf.root;
4030 }
4031
4032 /* Free the derived linker hash table. */
4033
4034 static void
4035 ppc64_elf_link_hash_table_free (struct bfd_link_hash_table *hash)
4036 {
4037 struct ppc_link_hash_table *htab = (struct ppc_link_hash_table *) hash;
4038
4039 bfd_hash_table_free (&htab->stub_hash_table);
4040 bfd_hash_table_free (&htab->branch_hash_table);
4041 if (htab->tocsave_htab)
4042 htab_delete (htab->tocsave_htab);
4043 _bfd_generic_link_hash_table_free (hash);
4044 }
4045
4046 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
4047
4048 void
4049 ppc64_elf_init_stub_bfd (bfd *abfd, struct bfd_link_info *info)
4050 {
4051 struct ppc_link_hash_table *htab;
4052
4053 elf_elfheader (abfd)->e_ident[EI_CLASS] = ELFCLASS64;
4054
4055 /* Always hook our dynamic sections into the first bfd, which is the
4056 linker created stub bfd. This ensures that the GOT header is at
4057 the start of the output TOC section. */
4058 htab = ppc_hash_table (info);
4059 if (htab == NULL)
4060 return;
4061 htab->stub_bfd = abfd;
4062 htab->elf.dynobj = abfd;
4063 }
4064
4065 /* Build a name for an entry in the stub hash table. */
4066
4067 static char *
4068 ppc_stub_name (const asection *input_section,
4069 const asection *sym_sec,
4070 const struct ppc_link_hash_entry *h,
4071 const Elf_Internal_Rela *rel)
4072 {
4073 char *stub_name;
4074 bfd_size_type len;
4075
4076 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
4077 offsets from a sym as a branch target? In fact, we could
4078 probably assume the addend is always zero. */
4079 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
4080
4081 if (h)
4082 {
4083 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
4084 stub_name = bfd_malloc (len);
4085 if (stub_name == NULL)
4086 return stub_name;
4087
4088 sprintf (stub_name, "%08x.%s+%x",
4089 input_section->id & 0xffffffff,
4090 h->elf.root.root.string,
4091 (int) rel->r_addend & 0xffffffff);
4092 }
4093 else
4094 {
4095 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
4096 stub_name = bfd_malloc (len);
4097 if (stub_name == NULL)
4098 return stub_name;
4099
4100 sprintf (stub_name, "%08x.%x:%x+%x",
4101 input_section->id & 0xffffffff,
4102 sym_sec->id & 0xffffffff,
4103 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
4104 (int) rel->r_addend & 0xffffffff);
4105 }
4106 if (stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
4107 stub_name[len - 2] = 0;
4108 return stub_name;
4109 }
4110
4111 /* Look up an entry in the stub hash. Stub entries are cached because
4112 creating the stub name takes a bit of time. */
4113
4114 static struct ppc_stub_hash_entry *
4115 ppc_get_stub_entry (const asection *input_section,
4116 const asection *sym_sec,
4117 struct ppc_link_hash_entry *h,
4118 const Elf_Internal_Rela *rel,
4119 struct ppc_link_hash_table *htab)
4120 {
4121 struct ppc_stub_hash_entry *stub_entry;
4122 const asection *id_sec;
4123
4124 /* If this input section is part of a group of sections sharing one
4125 stub section, then use the id of the first section in the group.
4126 Stub names need to include a section id, as there may well be
4127 more than one stub used to reach say, printf, and we need to
4128 distinguish between them. */
4129 id_sec = htab->stub_group[input_section->id].link_sec;
4130
4131 if (h != NULL && h->u.stub_cache != NULL
4132 && h->u.stub_cache->h == h
4133 && h->u.stub_cache->id_sec == id_sec)
4134 {
4135 stub_entry = h->u.stub_cache;
4136 }
4137 else
4138 {
4139 char *stub_name;
4140
4141 stub_name = ppc_stub_name (id_sec, sym_sec, h, rel);
4142 if (stub_name == NULL)
4143 return NULL;
4144
4145 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
4146 stub_name, FALSE, FALSE);
4147 if (h != NULL)
4148 h->u.stub_cache = stub_entry;
4149
4150 free (stub_name);
4151 }
4152
4153 return stub_entry;
4154 }
4155
4156 /* Add a new stub entry to the stub hash. Not all fields of the new
4157 stub entry are initialised. */
4158
4159 static struct ppc_stub_hash_entry *
4160 ppc_add_stub (const char *stub_name,
4161 asection *section,
4162 struct bfd_link_info *info)
4163 {
4164 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4165 asection *link_sec;
4166 asection *stub_sec;
4167 struct ppc_stub_hash_entry *stub_entry;
4168
4169 link_sec = htab->stub_group[section->id].link_sec;
4170 stub_sec = htab->stub_group[section->id].stub_sec;
4171 if (stub_sec == NULL)
4172 {
4173 stub_sec = htab->stub_group[link_sec->id].stub_sec;
4174 if (stub_sec == NULL)
4175 {
4176 size_t namelen;
4177 bfd_size_type len;
4178 char *s_name;
4179
4180 namelen = strlen (link_sec->name);
4181 len = namelen + sizeof (STUB_SUFFIX);
4182 s_name = bfd_alloc (htab->stub_bfd, len);
4183 if (s_name == NULL)
4184 return NULL;
4185
4186 memcpy (s_name, link_sec->name, namelen);
4187 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
4188 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
4189 if (stub_sec == NULL)
4190 return NULL;
4191 htab->stub_group[link_sec->id].stub_sec = stub_sec;
4192 }
4193 htab->stub_group[section->id].stub_sec = stub_sec;
4194 }
4195
4196 /* Enter this entry into the linker stub hash table. */
4197 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
4198 TRUE, FALSE);
4199 if (stub_entry == NULL)
4200 {
4201 info->callbacks->einfo (_("%P: %B: cannot create stub entry %s\n"),
4202 section->owner, stub_name);
4203 return NULL;
4204 }
4205
4206 stub_entry->stub_sec = stub_sec;
4207 stub_entry->stub_offset = 0;
4208 stub_entry->id_sec = link_sec;
4209 return stub_entry;
4210 }
4211
4212 /* Create sections for linker generated code. */
4213
4214 static bfd_boolean
4215 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
4216 {
4217 struct ppc_link_hash_table *htab;
4218 flagword flags;
4219
4220 htab = ppc_hash_table (info);
4221 if (htab == NULL)
4222 return FALSE;
4223
4224 /* Create .sfpr for code to save and restore fp regs. */
4225 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
4226 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4227 htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr",
4228 flags);
4229 if (htab->sfpr == NULL
4230 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
4231 return FALSE;
4232
4233 /* Create .glink for lazy dynamic linking support. */
4234 htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink",
4235 flags);
4236 if (htab->glink == NULL
4237 || ! bfd_set_section_alignment (dynobj, htab->glink, 3))
4238 return FALSE;
4239
4240 if (!info->no_ld_generated_unwind_info)
4241 {
4242 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
4243 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4244 htab->glink_eh_frame = bfd_make_section_anyway_with_flags (dynobj,
4245 ".eh_frame",
4246 flags);
4247 if (htab->glink_eh_frame == NULL
4248 || !bfd_set_section_alignment (abfd, htab->glink_eh_frame, 2))
4249 return FALSE;
4250 }
4251
4252 flags = SEC_ALLOC | SEC_LINKER_CREATED;
4253 htab->iplt = bfd_make_section_anyway_with_flags (dynobj, ".iplt", flags);
4254 if (htab->iplt == NULL
4255 || ! bfd_set_section_alignment (dynobj, htab->iplt, 3))
4256 return FALSE;
4257
4258 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4259 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4260 htab->reliplt = bfd_make_section_anyway_with_flags (dynobj,
4261 ".rela.iplt",
4262 flags);
4263 if (htab->reliplt == NULL
4264 || ! bfd_set_section_alignment (dynobj, htab->reliplt, 3))
4265 return FALSE;
4266
4267 /* Create branch lookup table for plt_branch stubs. */
4268 flags = (SEC_ALLOC | SEC_LOAD
4269 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4270 htab->brlt = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt",
4271 flags);
4272 if (htab->brlt == NULL
4273 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
4274 return FALSE;
4275
4276 if (!info->shared)
4277 return TRUE;
4278
4279 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4280 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4281 htab->relbrlt = bfd_make_section_anyway_with_flags (dynobj,
4282 ".rela.branch_lt",
4283 flags);
4284 if (htab->relbrlt == NULL
4285 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
4286 return FALSE;
4287
4288 return TRUE;
4289 }
4290
4291 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
4292 not already done. */
4293
4294 static bfd_boolean
4295 create_got_section (bfd *abfd, struct bfd_link_info *info)
4296 {
4297 asection *got, *relgot;
4298 flagword flags;
4299 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4300
4301 if (!is_ppc64_elf (abfd))
4302 return FALSE;
4303 if (htab == NULL)
4304 return FALSE;
4305
4306 if (!htab->got)
4307 {
4308 if (! _bfd_elf_create_got_section (htab->elf.dynobj, info))
4309 return FALSE;
4310
4311 htab->got = bfd_get_section_by_name (htab->elf.dynobj, ".got");
4312 if (!htab->got)
4313 abort ();
4314 }
4315
4316 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
4317 | SEC_LINKER_CREATED);
4318
4319 got = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
4320 if (!got
4321 || !bfd_set_section_alignment (abfd, got, 3))
4322 return FALSE;
4323
4324 relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got",
4325 flags | SEC_READONLY);
4326 if (!relgot
4327 || ! bfd_set_section_alignment (abfd, relgot, 3))
4328 return FALSE;
4329
4330 ppc64_elf_tdata (abfd)->got = got;
4331 ppc64_elf_tdata (abfd)->relgot = relgot;
4332 return TRUE;
4333 }
4334
4335 /* Create the dynamic sections, and set up shortcuts. */
4336
4337 static bfd_boolean
4338 ppc64_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
4339 {
4340 struct ppc_link_hash_table *htab;
4341
4342 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
4343 return FALSE;
4344
4345 htab = ppc_hash_table (info);
4346 if (htab == NULL)
4347 return FALSE;
4348
4349 if (!htab->got)
4350 htab->got = bfd_get_section_by_name (dynobj, ".got");
4351 htab->plt = bfd_get_section_by_name (dynobj, ".plt");
4352 htab->relplt = bfd_get_section_by_name (dynobj, ".rela.plt");
4353 htab->dynbss = bfd_get_section_by_name (dynobj, ".dynbss");
4354 if (!info->shared)
4355 htab->relbss = bfd_get_section_by_name (dynobj, ".rela.bss");
4356
4357 if (!htab->got || !htab->plt || !htab->relplt || !htab->dynbss
4358 || (!info->shared && !htab->relbss))
4359 abort ();
4360
4361 return TRUE;
4362 }
4363
4364 /* Follow indirect and warning symbol links. */
4365
4366 static inline struct bfd_link_hash_entry *
4367 follow_link (struct bfd_link_hash_entry *h)
4368 {
4369 while (h->type == bfd_link_hash_indirect
4370 || h->type == bfd_link_hash_warning)
4371 h = h->u.i.link;
4372 return h;
4373 }
4374
4375 static inline struct elf_link_hash_entry *
4376 elf_follow_link (struct elf_link_hash_entry *h)
4377 {
4378 return (struct elf_link_hash_entry *) follow_link (&h->root);
4379 }
4380
4381 static inline struct ppc_link_hash_entry *
4382 ppc_follow_link (struct ppc_link_hash_entry *h)
4383 {
4384 return (struct ppc_link_hash_entry *) follow_link (&h->elf.root);
4385 }
4386
4387 /* Merge PLT info on FROM with that on TO. */
4388
4389 static void
4390 move_plt_plist (struct ppc_link_hash_entry *from,
4391 struct ppc_link_hash_entry *to)
4392 {
4393 if (from->elf.plt.plist != NULL)
4394 {
4395 if (to->elf.plt.plist != NULL)
4396 {
4397 struct plt_entry **entp;
4398 struct plt_entry *ent;
4399
4400 for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; )
4401 {
4402 struct plt_entry *dent;
4403
4404 for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next)
4405 if (dent->addend == ent->addend)
4406 {
4407 dent->plt.refcount += ent->plt.refcount;
4408 *entp = ent->next;
4409 break;
4410 }
4411 if (dent == NULL)
4412 entp = &ent->next;
4413 }
4414 *entp = to->elf.plt.plist;
4415 }
4416
4417 to->elf.plt.plist = from->elf.plt.plist;
4418 from->elf.plt.plist = NULL;
4419 }
4420 }
4421
4422 /* Copy the extra info we tack onto an elf_link_hash_entry. */
4423
4424 static void
4425 ppc64_elf_copy_indirect_symbol (struct bfd_link_info *info,
4426 struct elf_link_hash_entry *dir,
4427 struct elf_link_hash_entry *ind)
4428 {
4429 struct ppc_link_hash_entry *edir, *eind;
4430
4431 edir = (struct ppc_link_hash_entry *) dir;
4432 eind = (struct ppc_link_hash_entry *) ind;
4433
4434 edir->is_func |= eind->is_func;
4435 edir->is_func_descriptor |= eind->is_func_descriptor;
4436 edir->tls_mask |= eind->tls_mask;
4437 if (eind->oh != NULL)
4438 edir->oh = ppc_follow_link (eind->oh);
4439
4440 /* If called to transfer flags for a weakdef during processing
4441 of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF.
4442 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
4443 if (!(ELIMINATE_COPY_RELOCS
4444 && eind->elf.root.type != bfd_link_hash_indirect
4445 && edir->elf.dynamic_adjusted))
4446 edir->elf.non_got_ref |= eind->elf.non_got_ref;
4447
4448 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
4449 edir->elf.ref_regular |= eind->elf.ref_regular;
4450 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
4451 edir->elf.needs_plt |= eind->elf.needs_plt;
4452
4453 /* Copy over any dynamic relocs we may have on the indirect sym. */
4454 if (eind->dyn_relocs != NULL)
4455 {
4456 if (edir->dyn_relocs != NULL)
4457 {
4458 struct elf_dyn_relocs **pp;
4459 struct elf_dyn_relocs *p;
4460
4461 /* Add reloc counts against the indirect sym to the direct sym
4462 list. Merge any entries against the same section. */
4463 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
4464 {
4465 struct elf_dyn_relocs *q;
4466
4467 for (q = edir->dyn_relocs; q != NULL; q = q->next)
4468 if (q->sec == p->sec)
4469 {
4470 q->pc_count += p->pc_count;
4471 q->count += p->count;
4472 *pp = p->next;
4473 break;
4474 }
4475 if (q == NULL)
4476 pp = &p->next;
4477 }
4478 *pp = edir->dyn_relocs;
4479 }
4480
4481 edir->dyn_relocs = eind->dyn_relocs;
4482 eind->dyn_relocs = NULL;
4483 }
4484
4485 /* If we were called to copy over info for a weak sym, that's all.
4486 You might think dyn_relocs need not be copied over; After all,
4487 both syms will be dynamic or both non-dynamic so we're just
4488 moving reloc accounting around. However, ELIMINATE_COPY_RELOCS
4489 code in ppc64_elf_adjust_dynamic_symbol needs to check for
4490 dyn_relocs in read-only sections, and it does so on what is the
4491 DIR sym here. */
4492 if (eind->elf.root.type != bfd_link_hash_indirect)
4493 return;
4494
4495 /* Copy over got entries that we may have already seen to the
4496 symbol which just became indirect. */
4497 if (eind->elf.got.glist != NULL)
4498 {
4499 if (edir->elf.got.glist != NULL)
4500 {
4501 struct got_entry **entp;
4502 struct got_entry *ent;
4503
4504 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
4505 {
4506 struct got_entry *dent;
4507
4508 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
4509 if (dent->addend == ent->addend
4510 && dent->owner == ent->owner
4511 && dent->tls_type == ent->tls_type)
4512 {
4513 dent->got.refcount += ent->got.refcount;
4514 *entp = ent->next;
4515 break;
4516 }
4517 if (dent == NULL)
4518 entp = &ent->next;
4519 }
4520 *entp = edir->elf.got.glist;
4521 }
4522
4523 edir->elf.got.glist = eind->elf.got.glist;
4524 eind->elf.got.glist = NULL;
4525 }
4526
4527 /* And plt entries. */
4528 move_plt_plist (eind, edir);
4529
4530 if (eind->elf.dynindx != -1)
4531 {
4532 if (edir->elf.dynindx != -1)
4533 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4534 edir->elf.dynstr_index);
4535 edir->elf.dynindx = eind->elf.dynindx;
4536 edir->elf.dynstr_index = eind->elf.dynstr_index;
4537 eind->elf.dynindx = -1;
4538 eind->elf.dynstr_index = 0;
4539 }
4540 }
4541
4542 /* Find the function descriptor hash entry from the given function code
4543 hash entry FH. Link the entries via their OH fields. */
4544
4545 static struct ppc_link_hash_entry *
4546 lookup_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
4547 {
4548 struct ppc_link_hash_entry *fdh = fh->oh;
4549
4550 if (fdh == NULL)
4551 {
4552 const char *fd_name = fh->elf.root.root.string + 1;
4553
4554 fdh = (struct ppc_link_hash_entry *)
4555 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
4556 if (fdh == NULL)
4557 return fdh;
4558
4559 fdh->is_func_descriptor = 1;
4560 fdh->oh = fh;
4561 fh->is_func = 1;
4562 fh->oh = fdh;
4563 }
4564
4565 return ppc_follow_link (fdh);
4566 }
4567
4568 /* Make a fake function descriptor sym for the code sym FH. */
4569
4570 static struct ppc_link_hash_entry *
4571 make_fdh (struct bfd_link_info *info,
4572 struct ppc_link_hash_entry *fh)
4573 {
4574 bfd *abfd;
4575 asymbol *newsym;
4576 struct bfd_link_hash_entry *bh;
4577 struct ppc_link_hash_entry *fdh;
4578
4579 abfd = fh->elf.root.u.undef.abfd;
4580 newsym = bfd_make_empty_symbol (abfd);
4581 newsym->name = fh->elf.root.root.string + 1;
4582 newsym->section = bfd_und_section_ptr;
4583 newsym->value = 0;
4584 newsym->flags = BSF_WEAK;
4585
4586 bh = NULL;
4587 if (!_bfd_generic_link_add_one_symbol (info, abfd, newsym->name,
4588 newsym->flags, newsym->section,
4589 newsym->value, NULL, FALSE, FALSE,
4590 &bh))
4591 return NULL;
4592
4593 fdh = (struct ppc_link_hash_entry *) bh;
4594 fdh->elf.non_elf = 0;
4595 fdh->fake = 1;
4596 fdh->is_func_descriptor = 1;
4597 fdh->oh = fh;
4598 fh->is_func = 1;
4599 fh->oh = fdh;
4600 return fdh;
4601 }
4602
4603 /* Fix function descriptor symbols defined in .opd sections to be
4604 function type. */
4605
4606 static bfd_boolean
4607 ppc64_elf_add_symbol_hook (bfd *ibfd,
4608 struct bfd_link_info *info,
4609 Elf_Internal_Sym *isym,
4610 const char **name ATTRIBUTE_UNUSED,
4611 flagword *flags ATTRIBUTE_UNUSED,
4612 asection **sec,
4613 bfd_vma *value ATTRIBUTE_UNUSED)
4614 {
4615 if ((ibfd->flags & DYNAMIC) == 0
4616 && ELF_ST_BIND (isym->st_info) == STB_GNU_UNIQUE)
4617 elf_tdata (info->output_bfd)->has_gnu_symbols = TRUE;
4618
4619 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
4620 {
4621 if ((ibfd->flags & DYNAMIC) == 0)
4622 elf_tdata (info->output_bfd)->has_gnu_symbols = TRUE;
4623 }
4624 else if (ELF_ST_TYPE (isym->st_info) == STT_FUNC)
4625 ;
4626 else if (*sec != NULL
4627 && strcmp ((*sec)->name, ".opd") == 0)
4628 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
4629
4630 return TRUE;
4631 }
4632
4633 /* This function makes an old ABI object reference to ".bar" cause the
4634 inclusion of a new ABI object archive that defines "bar".
4635 NAME is a symbol defined in an archive. Return a symbol in the hash
4636 table that might be satisfied by the archive symbols. */
4637
4638 static struct elf_link_hash_entry *
4639 ppc64_elf_archive_symbol_lookup (bfd *abfd,
4640 struct bfd_link_info *info,
4641 const char *name)
4642 {
4643 struct elf_link_hash_entry *h;
4644 char *dot_name;
4645 size_t len;
4646
4647 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
4648 if (h != NULL
4649 /* Don't return this sym if it is a fake function descriptor
4650 created by add_symbol_adjust. */
4651 && !(h->root.type == bfd_link_hash_undefweak
4652 && ((struct ppc_link_hash_entry *) h)->fake))
4653 return h;
4654
4655 if (name[0] == '.')
4656 return h;
4657
4658 len = strlen (name);
4659 dot_name = bfd_alloc (abfd, len + 2);
4660 if (dot_name == NULL)
4661 return (struct elf_link_hash_entry *) 0 - 1;
4662 dot_name[0] = '.';
4663 memcpy (dot_name + 1, name, len + 1);
4664 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
4665 bfd_release (abfd, dot_name);
4666 return h;
4667 }
4668
4669 /* This function satisfies all old ABI object references to ".bar" if a
4670 new ABI object defines "bar". Well, at least, undefined dot symbols
4671 are made weak. This stops later archive searches from including an
4672 object if we already have a function descriptor definition. It also
4673 prevents the linker complaining about undefined symbols.
4674 We also check and correct mismatched symbol visibility here. The
4675 most restrictive visibility of the function descriptor and the
4676 function entry symbol is used. */
4677
4678 static bfd_boolean
4679 add_symbol_adjust (struct ppc_link_hash_entry *eh, struct bfd_link_info *info)
4680 {
4681 struct ppc_link_hash_table *htab;
4682 struct ppc_link_hash_entry *fdh;
4683
4684 if (eh->elf.root.type == bfd_link_hash_indirect)
4685 return TRUE;
4686
4687 if (eh->elf.root.type == bfd_link_hash_warning)
4688 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
4689
4690 if (eh->elf.root.root.string[0] != '.')
4691 abort ();
4692
4693 htab = ppc_hash_table (info);
4694 if (htab == NULL)
4695 return FALSE;
4696
4697 fdh = lookup_fdh (eh, htab);
4698 if (fdh == NULL)
4699 {
4700 if (!info->relocatable
4701 && (eh->elf.root.type == bfd_link_hash_undefined
4702 || eh->elf.root.type == bfd_link_hash_undefweak)
4703 && eh->elf.ref_regular)
4704 {
4705 /* Make an undefweak function descriptor sym, which is enough to
4706 pull in an --as-needed shared lib, but won't cause link
4707 errors. Archives are handled elsewhere. */
4708 fdh = make_fdh (info, eh);
4709 if (fdh == NULL)
4710 return FALSE;
4711 fdh->elf.ref_regular = 1;
4712 }
4713 }
4714 else
4715 {
4716 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
4717 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
4718 if (entry_vis < descr_vis)
4719 fdh->elf.other += entry_vis - descr_vis;
4720 else if (entry_vis > descr_vis)
4721 eh->elf.other += descr_vis - entry_vis;
4722
4723 if ((fdh->elf.root.type == bfd_link_hash_defined
4724 || fdh->elf.root.type == bfd_link_hash_defweak)
4725 && eh->elf.root.type == bfd_link_hash_undefined)
4726 {
4727 eh->elf.root.type = bfd_link_hash_undefweak;
4728 eh->was_undefined = 1;
4729 htab->twiddled_syms = 1;
4730 }
4731 }
4732
4733 return TRUE;
4734 }
4735
4736 /* Process list of dot-symbols we made in link_hash_newfunc. */
4737
4738 static bfd_boolean
4739 ppc64_elf_process_dot_syms (bfd *ibfd, struct bfd_link_info *info)
4740 {
4741 struct ppc_link_hash_table *htab;
4742 struct ppc_link_hash_entry **p, *eh;
4743
4744 if (!is_ppc64_elf (info->output_bfd))
4745 return TRUE;
4746 htab = ppc_hash_table (info);
4747 if (htab == NULL)
4748 return FALSE;
4749
4750 if (is_ppc64_elf (ibfd))
4751 {
4752 p = &htab->dot_syms;
4753 while ((eh = *p) != NULL)
4754 {
4755 *p = NULL;
4756 if (!add_symbol_adjust (eh, info))
4757 return FALSE;
4758 p = &eh->u.next_dot_sym;
4759 }
4760 }
4761
4762 /* Clear the list for non-ppc64 input files. */
4763 p = &htab->dot_syms;
4764 while ((eh = *p) != NULL)
4765 {
4766 *p = NULL;
4767 p = &eh->u.next_dot_sym;
4768 }
4769
4770 /* We need to fix the undefs list for any syms we have twiddled to
4771 undef_weak. */
4772 if (htab->twiddled_syms)
4773 {
4774 bfd_link_repair_undef_list (&htab->elf.root);
4775 htab->twiddled_syms = 0;
4776 }
4777 return TRUE;
4778 }
4779
4780 /* Undo hash table changes when an --as-needed input file is determined
4781 not to be needed. */
4782
4783 static bfd_boolean
4784 ppc64_elf_as_needed_cleanup (bfd *ibfd ATTRIBUTE_UNUSED,
4785 struct bfd_link_info *info)
4786 {
4787 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4788
4789 if (htab == NULL)
4790 return FALSE;
4791
4792 htab->dot_syms = NULL;
4793 return TRUE;
4794 }
4795
4796 /* If --just-symbols against a final linked binary, then assume we need
4797 toc adjusting stubs when calling functions defined there. */
4798
4799 static void
4800 ppc64_elf_link_just_syms (asection *sec, struct bfd_link_info *info)
4801 {
4802 if ((sec->flags & SEC_CODE) != 0
4803 && (sec->owner->flags & (EXEC_P | DYNAMIC)) != 0
4804 && is_ppc64_elf (sec->owner))
4805 {
4806 asection *got = bfd_get_section_by_name (sec->owner, ".got");
4807 if (got != NULL
4808 && got->size >= elf_backend_got_header_size
4809 && bfd_get_section_by_name (sec->owner, ".opd") != NULL)
4810 sec->has_toc_reloc = 1;
4811 }
4812 _bfd_elf_link_just_syms (sec, info);
4813 }
4814
4815 static struct plt_entry **
4816 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
4817 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
4818 {
4819 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
4820 struct plt_entry **local_plt;
4821 unsigned char *local_got_tls_masks;
4822
4823 if (local_got_ents == NULL)
4824 {
4825 bfd_size_type size = symtab_hdr->sh_info;
4826
4827 size *= (sizeof (*local_got_ents)
4828 + sizeof (*local_plt)
4829 + sizeof (*local_got_tls_masks));
4830 local_got_ents = bfd_zalloc (abfd, size);
4831 if (local_got_ents == NULL)
4832 return NULL;
4833 elf_local_got_ents (abfd) = local_got_ents;
4834 }
4835
4836 if ((tls_type & (PLT_IFUNC | TLS_EXPLICIT)) == 0)
4837 {
4838 struct got_entry *ent;
4839
4840 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
4841 if (ent->addend == r_addend
4842 && ent->owner == abfd
4843 && ent->tls_type == tls_type)
4844 break;
4845 if (ent == NULL)
4846 {
4847 bfd_size_type amt = sizeof (*ent);
4848 ent = bfd_alloc (abfd, amt);
4849 if (ent == NULL)
4850 return FALSE;
4851 ent->next = local_got_ents[r_symndx];
4852 ent->addend = r_addend;
4853 ent->owner = abfd;
4854 ent->tls_type = tls_type;
4855 ent->is_indirect = FALSE;
4856 ent->got.refcount = 0;
4857 local_got_ents[r_symndx] = ent;
4858 }
4859 ent->got.refcount += 1;
4860 }
4861
4862 local_plt = (struct plt_entry **) (local_got_ents + symtab_hdr->sh_info);
4863 local_got_tls_masks = (unsigned char *) (local_plt + symtab_hdr->sh_info);
4864 local_got_tls_masks[r_symndx] |= tls_type;
4865
4866 return local_plt + r_symndx;
4867 }
4868
4869 static bfd_boolean
4870 update_plt_info (bfd *abfd, struct plt_entry **plist, bfd_vma addend)
4871 {
4872 struct plt_entry *ent;
4873
4874 for (ent = *plist; ent != NULL; ent = ent->next)
4875 if (ent->addend == addend)
4876 break;
4877 if (ent == NULL)
4878 {
4879 bfd_size_type amt = sizeof (*ent);
4880 ent = bfd_alloc (abfd, amt);
4881 if (ent == NULL)
4882 return FALSE;
4883 ent->next = *plist;
4884 ent->addend = addend;
4885 ent->plt.refcount = 0;
4886 *plist = ent;
4887 }
4888 ent->plt.refcount += 1;
4889 return TRUE;
4890 }
4891
4892 static bfd_boolean
4893 is_branch_reloc (enum elf_ppc64_reloc_type r_type)
4894 {
4895 return (r_type == R_PPC64_REL24
4896 || r_type == R_PPC64_REL14
4897 || r_type == R_PPC64_REL14_BRTAKEN
4898 || r_type == R_PPC64_REL14_BRNTAKEN
4899 || r_type == R_PPC64_ADDR24
4900 || r_type == R_PPC64_ADDR14
4901 || r_type == R_PPC64_ADDR14_BRTAKEN
4902 || r_type == R_PPC64_ADDR14_BRNTAKEN);
4903 }
4904
4905 /* Look through the relocs for a section during the first phase, and
4906 calculate needed space in the global offset table, procedure
4907 linkage table, and dynamic reloc sections. */
4908
4909 static bfd_boolean
4910 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
4911 asection *sec, const Elf_Internal_Rela *relocs)
4912 {
4913 struct ppc_link_hash_table *htab;
4914 Elf_Internal_Shdr *symtab_hdr;
4915 struct elf_link_hash_entry **sym_hashes;
4916 const Elf_Internal_Rela *rel;
4917 const Elf_Internal_Rela *rel_end;
4918 asection *sreloc;
4919 asection **opd_sym_map;
4920 struct elf_link_hash_entry *tga, *dottga;
4921
4922 if (info->relocatable)
4923 return TRUE;
4924
4925 /* Don't do anything special with non-loaded, non-alloced sections.
4926 In particular, any relocs in such sections should not affect GOT
4927 and PLT reference counting (ie. we don't allow them to create GOT
4928 or PLT entries), there's no possibility or desire to optimize TLS
4929 relocs, and there's not much point in propagating relocs to shared
4930 libs that the dynamic linker won't relocate. */
4931 if ((sec->flags & SEC_ALLOC) == 0)
4932 return TRUE;
4933
4934 BFD_ASSERT (is_ppc64_elf (abfd));
4935
4936 htab = ppc_hash_table (info);
4937 if (htab == NULL)
4938 return FALSE;
4939
4940 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
4941 FALSE, FALSE, TRUE);
4942 dottga = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
4943 FALSE, FALSE, TRUE);
4944 symtab_hdr = &elf_symtab_hdr (abfd);
4945 sym_hashes = elf_sym_hashes (abfd);
4946 sreloc = NULL;
4947 opd_sym_map = NULL;
4948 if (strcmp (sec->name, ".opd") == 0)
4949 {
4950 /* Garbage collection needs some extra help with .opd sections.
4951 We don't want to necessarily keep everything referenced by
4952 relocs in .opd, as that would keep all functions. Instead,
4953 if we reference an .opd symbol (a function descriptor), we
4954 want to keep the function code symbol's section. This is
4955 easy for global symbols, but for local syms we need to keep
4956 information about the associated function section. */
4957 bfd_size_type amt;
4958
4959 amt = sec->size * sizeof (*opd_sym_map) / 8;
4960 opd_sym_map = bfd_zalloc (abfd, amt);
4961 if (opd_sym_map == NULL)
4962 return FALSE;
4963 ppc64_elf_section_data (sec)->u.opd.func_sec = opd_sym_map;
4964 BFD_ASSERT (ppc64_elf_section_data (sec)->sec_type == sec_normal);
4965 ppc64_elf_section_data (sec)->sec_type = sec_opd;
4966 }
4967
4968 if (htab->sfpr == NULL
4969 && !create_linkage_sections (htab->elf.dynobj, info))
4970 return FALSE;
4971
4972 rel_end = relocs + sec->reloc_count;
4973 for (rel = relocs; rel < rel_end; rel++)
4974 {
4975 unsigned long r_symndx;
4976 struct elf_link_hash_entry *h;
4977 enum elf_ppc64_reloc_type r_type;
4978 int tls_type;
4979 struct _ppc64_elf_section_data *ppc64_sec;
4980 struct plt_entry **ifunc;
4981
4982 r_symndx = ELF64_R_SYM (rel->r_info);
4983 if (r_symndx < symtab_hdr->sh_info)
4984 h = NULL;
4985 else
4986 {
4987 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4988 h = elf_follow_link (h);
4989 }
4990
4991 tls_type = 0;
4992 ifunc = NULL;
4993 if (h != NULL)
4994 {
4995 if (h->type == STT_GNU_IFUNC)
4996 {
4997 h->needs_plt = 1;
4998 ifunc = &h->plt.plist;
4999 }
5000 }
5001 else
5002 {
5003 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5004 abfd, r_symndx);
5005 if (isym == NULL)
5006 return FALSE;
5007
5008 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
5009 {
5010 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
5011 rel->r_addend, PLT_IFUNC);
5012 if (ifunc == NULL)
5013 return FALSE;
5014 }
5015 }
5016 r_type = ELF64_R_TYPE (rel->r_info);
5017 if (is_branch_reloc (r_type))
5018 {
5019 if (h != NULL && (h == tga || h == dottga))
5020 {
5021 if (rel != relocs
5022 && (ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSGD
5023 || ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSLD))
5024 /* We have a new-style __tls_get_addr call with a marker
5025 reloc. */
5026 ;
5027 else
5028 /* Mark this section as having an old-style call. */
5029 sec->has_tls_get_addr_call = 1;
5030 }
5031
5032 /* STT_GNU_IFUNC symbols must have a PLT entry. */
5033 if (ifunc != NULL
5034 && !update_plt_info (abfd, ifunc, rel->r_addend))
5035 return FALSE;
5036 }
5037
5038 switch (r_type)
5039 {
5040 case R_PPC64_TLSGD:
5041 case R_PPC64_TLSLD:
5042 /* These special tls relocs tie a call to __tls_get_addr with
5043 its parameter symbol. */
5044 break;
5045
5046 case R_PPC64_GOT_TLSLD16:
5047 case R_PPC64_GOT_TLSLD16_LO:
5048 case R_PPC64_GOT_TLSLD16_HI:
5049 case R_PPC64_GOT_TLSLD16_HA:
5050 tls_type = TLS_TLS | TLS_LD;
5051 goto dogottls;
5052
5053 case R_PPC64_GOT_TLSGD16:
5054 case R_PPC64_GOT_TLSGD16_LO:
5055 case R_PPC64_GOT_TLSGD16_HI:
5056 case R_PPC64_GOT_TLSGD16_HA:
5057 tls_type = TLS_TLS | TLS_GD;
5058 goto dogottls;
5059
5060 case R_PPC64_GOT_TPREL16_DS:
5061 case R_PPC64_GOT_TPREL16_LO_DS:
5062 case R_PPC64_GOT_TPREL16_HI:
5063 case R_PPC64_GOT_TPREL16_HA:
5064 if (!info->executable)
5065 info->flags |= DF_STATIC_TLS;
5066 tls_type = TLS_TLS | TLS_TPREL;
5067 goto dogottls;
5068
5069 case R_PPC64_GOT_DTPREL16_DS:
5070 case R_PPC64_GOT_DTPREL16_LO_DS:
5071 case R_PPC64_GOT_DTPREL16_HI:
5072 case R_PPC64_GOT_DTPREL16_HA:
5073 tls_type = TLS_TLS | TLS_DTPREL;
5074 dogottls:
5075 sec->has_tls_reloc = 1;
5076 /* Fall thru */
5077
5078 case R_PPC64_GOT16:
5079 case R_PPC64_GOT16_DS:
5080 case R_PPC64_GOT16_HA:
5081 case R_PPC64_GOT16_HI:
5082 case R_PPC64_GOT16_LO:
5083 case R_PPC64_GOT16_LO_DS:
5084 /* This symbol requires a global offset table entry. */
5085 sec->has_toc_reloc = 1;
5086 if (r_type == R_PPC64_GOT_TLSLD16
5087 || r_type == R_PPC64_GOT_TLSGD16
5088 || r_type == R_PPC64_GOT_TPREL16_DS
5089 || r_type == R_PPC64_GOT_DTPREL16_DS
5090 || r_type == R_PPC64_GOT16
5091 || r_type == R_PPC64_GOT16_DS)
5092 {
5093 htab->do_multi_toc = 1;
5094 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5095 }
5096
5097 if (ppc64_elf_tdata (abfd)->got == NULL
5098 && !create_got_section (abfd, info))
5099 return FALSE;
5100
5101 if (h != NULL)
5102 {
5103 struct ppc_link_hash_entry *eh;
5104 struct got_entry *ent;
5105
5106 eh = (struct ppc_link_hash_entry *) h;
5107 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
5108 if (ent->addend == rel->r_addend
5109 && ent->owner == abfd
5110 && ent->tls_type == tls_type)
5111 break;
5112 if (ent == NULL)
5113 {
5114 bfd_size_type amt = sizeof (*ent);
5115 ent = bfd_alloc (abfd, amt);
5116 if (ent == NULL)
5117 return FALSE;
5118 ent->next = eh->elf.got.glist;
5119 ent->addend = rel->r_addend;
5120 ent->owner = abfd;
5121 ent->tls_type = tls_type;
5122 ent->is_indirect = FALSE;
5123 ent->got.refcount = 0;
5124 eh->elf.got.glist = ent;
5125 }
5126 ent->got.refcount += 1;
5127 eh->tls_mask |= tls_type;
5128 }
5129 else
5130 /* This is a global offset table entry for a local symbol. */
5131 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5132 rel->r_addend, tls_type))
5133 return FALSE;
5134 break;
5135
5136 case R_PPC64_PLT16_HA:
5137 case R_PPC64_PLT16_HI:
5138 case R_PPC64_PLT16_LO:
5139 case R_PPC64_PLT32:
5140 case R_PPC64_PLT64:
5141 /* This symbol requires a procedure linkage table entry. We
5142 actually build the entry in adjust_dynamic_symbol,
5143 because this might be a case of linking PIC code without
5144 linking in any dynamic objects, in which case we don't
5145 need to generate a procedure linkage table after all. */
5146 if (h == NULL)
5147 {
5148 /* It does not make sense to have a procedure linkage
5149 table entry for a local symbol. */
5150 bfd_set_error (bfd_error_bad_value);
5151 return FALSE;
5152 }
5153 else
5154 {
5155 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5156 return FALSE;
5157 h->needs_plt = 1;
5158 if (h->root.root.string[0] == '.'
5159 && h->root.root.string[1] != '\0')
5160 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5161 }
5162 break;
5163
5164 /* The following relocations don't need to propagate the
5165 relocation if linking a shared object since they are
5166 section relative. */
5167 case R_PPC64_SECTOFF:
5168 case R_PPC64_SECTOFF_LO:
5169 case R_PPC64_SECTOFF_HI:
5170 case R_PPC64_SECTOFF_HA:
5171 case R_PPC64_SECTOFF_DS:
5172 case R_PPC64_SECTOFF_LO_DS:
5173 case R_PPC64_DTPREL16:
5174 case R_PPC64_DTPREL16_LO:
5175 case R_PPC64_DTPREL16_HI:
5176 case R_PPC64_DTPREL16_HA:
5177 case R_PPC64_DTPREL16_DS:
5178 case R_PPC64_DTPREL16_LO_DS:
5179 case R_PPC64_DTPREL16_HIGHER:
5180 case R_PPC64_DTPREL16_HIGHERA:
5181 case R_PPC64_DTPREL16_HIGHEST:
5182 case R_PPC64_DTPREL16_HIGHESTA:
5183 break;
5184
5185 /* Nor do these. */
5186 case R_PPC64_REL16:
5187 case R_PPC64_REL16_LO:
5188 case R_PPC64_REL16_HI:
5189 case R_PPC64_REL16_HA:
5190 break;
5191
5192 case R_PPC64_TOC16:
5193 case R_PPC64_TOC16_DS:
5194 htab->do_multi_toc = 1;
5195 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5196 case R_PPC64_TOC16_LO:
5197 case R_PPC64_TOC16_HI:
5198 case R_PPC64_TOC16_HA:
5199 case R_PPC64_TOC16_LO_DS:
5200 sec->has_toc_reloc = 1;
5201 break;
5202
5203 /* This relocation describes the C++ object vtable hierarchy.
5204 Reconstruct it for later use during GC. */
5205 case R_PPC64_GNU_VTINHERIT:
5206 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
5207 return FALSE;
5208 break;
5209
5210 /* This relocation describes which C++ vtable entries are actually
5211 used. Record for later use during GC. */
5212 case R_PPC64_GNU_VTENTRY:
5213 BFD_ASSERT (h != NULL);
5214 if (h != NULL
5215 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
5216 return FALSE;
5217 break;
5218
5219 case R_PPC64_REL14:
5220 case R_PPC64_REL14_BRTAKEN:
5221 case R_PPC64_REL14_BRNTAKEN:
5222 {
5223 asection *dest = NULL;
5224
5225 /* Heuristic: If jumping outside our section, chances are
5226 we are going to need a stub. */
5227 if (h != NULL)
5228 {
5229 /* If the sym is weak it may be overridden later, so
5230 don't assume we know where a weak sym lives. */
5231 if (h->root.type == bfd_link_hash_defined)
5232 dest = h->root.u.def.section;
5233 }
5234 else
5235 {
5236 Elf_Internal_Sym *isym;
5237
5238 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5239 abfd, r_symndx);
5240 if (isym == NULL)
5241 return FALSE;
5242
5243 dest = bfd_section_from_elf_index (abfd, isym->st_shndx);
5244 }
5245
5246 if (dest != sec)
5247 ppc64_elf_section_data (sec)->has_14bit_branch = 1;
5248 }
5249 /* Fall through. */
5250
5251 case R_PPC64_REL24:
5252 if (h != NULL && ifunc == NULL)
5253 {
5254 /* We may need a .plt entry if the function this reloc
5255 refers to is in a shared lib. */
5256 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5257 return FALSE;
5258 h->needs_plt = 1;
5259 if (h->root.root.string[0] == '.'
5260 && h->root.root.string[1] != '\0')
5261 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5262 if (h == tga || h == dottga)
5263 sec->has_tls_reloc = 1;
5264 }
5265 break;
5266
5267 case R_PPC64_TPREL64:
5268 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
5269 if (!info->executable)
5270 info->flags |= DF_STATIC_TLS;
5271 goto dotlstoc;
5272
5273 case R_PPC64_DTPMOD64:
5274 if (rel + 1 < rel_end
5275 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
5276 && rel[1].r_offset == rel->r_offset + 8)
5277 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
5278 else
5279 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
5280 goto dotlstoc;
5281
5282 case R_PPC64_DTPREL64:
5283 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
5284 if (rel != relocs
5285 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
5286 && rel[-1].r_offset == rel->r_offset - 8)
5287 /* This is the second reloc of a dtpmod, dtprel pair.
5288 Don't mark with TLS_DTPREL. */
5289 goto dodyn;
5290
5291 dotlstoc:
5292 sec->has_tls_reloc = 1;
5293 if (h != NULL)
5294 {
5295 struct ppc_link_hash_entry *eh;
5296 eh = (struct ppc_link_hash_entry *) h;
5297 eh->tls_mask |= tls_type;
5298 }
5299 else
5300 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5301 rel->r_addend, tls_type))
5302 return FALSE;
5303
5304 ppc64_sec = ppc64_elf_section_data (sec);
5305 if (ppc64_sec->sec_type != sec_toc)
5306 {
5307 bfd_size_type amt;
5308
5309 /* One extra to simplify get_tls_mask. */
5310 amt = sec->size * sizeof (unsigned) / 8 + sizeof (unsigned);
5311 ppc64_sec->u.toc.symndx = bfd_zalloc (abfd, amt);
5312 if (ppc64_sec->u.toc.symndx == NULL)
5313 return FALSE;
5314 amt = sec->size * sizeof (bfd_vma) / 8;
5315 ppc64_sec->u.toc.add = bfd_zalloc (abfd, amt);
5316 if (ppc64_sec->u.toc.add == NULL)
5317 return FALSE;
5318 BFD_ASSERT (ppc64_sec->sec_type == sec_normal);
5319 ppc64_sec->sec_type = sec_toc;
5320 }
5321 BFD_ASSERT (rel->r_offset % 8 == 0);
5322 ppc64_sec->u.toc.symndx[rel->r_offset / 8] = r_symndx;
5323 ppc64_sec->u.toc.add[rel->r_offset / 8] = rel->r_addend;
5324
5325 /* Mark the second slot of a GD or LD entry.
5326 -1 to indicate GD and -2 to indicate LD. */
5327 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
5328 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -1;
5329 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
5330 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -2;
5331 goto dodyn;
5332
5333 case R_PPC64_TPREL16:
5334 case R_PPC64_TPREL16_LO:
5335 case R_PPC64_TPREL16_HI:
5336 case R_PPC64_TPREL16_HA:
5337 case R_PPC64_TPREL16_DS:
5338 case R_PPC64_TPREL16_LO_DS:
5339 case R_PPC64_TPREL16_HIGHER:
5340 case R_PPC64_TPREL16_HIGHERA:
5341 case R_PPC64_TPREL16_HIGHEST:
5342 case R_PPC64_TPREL16_HIGHESTA:
5343 if (info->shared)
5344 {
5345 if (!info->executable)
5346 info->flags |= DF_STATIC_TLS;
5347 goto dodyn;
5348 }
5349 break;
5350
5351 case R_PPC64_ADDR64:
5352 if (opd_sym_map != NULL
5353 && rel + 1 < rel_end
5354 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
5355 {
5356 if (h != NULL)
5357 {
5358 if (h->root.root.string[0] == '.'
5359 && h->root.root.string[1] != 0
5360 && lookup_fdh ((struct ppc_link_hash_entry *) h, htab))
5361 ;
5362 else
5363 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5364 }
5365 else
5366 {
5367 asection *s;
5368 Elf_Internal_Sym *isym;
5369
5370 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5371 abfd, r_symndx);
5372 if (isym == NULL)
5373 return FALSE;
5374
5375 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5376 if (s != NULL && s != sec)
5377 opd_sym_map[rel->r_offset / 8] = s;
5378 }
5379 }
5380 /* Fall through. */
5381
5382 case R_PPC64_REL30:
5383 case R_PPC64_REL32:
5384 case R_PPC64_REL64:
5385 case R_PPC64_ADDR14:
5386 case R_PPC64_ADDR14_BRNTAKEN:
5387 case R_PPC64_ADDR14_BRTAKEN:
5388 case R_PPC64_ADDR16:
5389 case R_PPC64_ADDR16_DS:
5390 case R_PPC64_ADDR16_HA:
5391 case R_PPC64_ADDR16_HI:
5392 case R_PPC64_ADDR16_HIGHER:
5393 case R_PPC64_ADDR16_HIGHERA:
5394 case R_PPC64_ADDR16_HIGHEST:
5395 case R_PPC64_ADDR16_HIGHESTA:
5396 case R_PPC64_ADDR16_LO:
5397 case R_PPC64_ADDR16_LO_DS:
5398 case R_PPC64_ADDR24:
5399 case R_PPC64_ADDR32:
5400 case R_PPC64_UADDR16:
5401 case R_PPC64_UADDR32:
5402 case R_PPC64_UADDR64:
5403 case R_PPC64_TOC:
5404 if (h != NULL && !info->shared)
5405 /* We may need a copy reloc. */
5406 h->non_got_ref = 1;
5407
5408 /* Don't propagate .opd relocs. */
5409 if (NO_OPD_RELOCS && opd_sym_map != NULL)
5410 break;
5411
5412 /* If we are creating a shared library, and this is a reloc
5413 against a global symbol, or a non PC relative reloc
5414 against a local symbol, then we need to copy the reloc
5415 into the shared library. However, if we are linking with
5416 -Bsymbolic, we do not need to copy a reloc against a
5417 global symbol which is defined in an object we are
5418 including in the link (i.e., DEF_REGULAR is set). At
5419 this point we have not seen all the input files, so it is
5420 possible that DEF_REGULAR is not set now but will be set
5421 later (it is never cleared). In case of a weak definition,
5422 DEF_REGULAR may be cleared later by a strong definition in
5423 a shared library. We account for that possibility below by
5424 storing information in the dyn_relocs field of the hash
5425 table entry. A similar situation occurs when creating
5426 shared libraries and symbol visibility changes render the
5427 symbol local.
5428
5429 If on the other hand, we are creating an executable, we
5430 may need to keep relocations for symbols satisfied by a
5431 dynamic library if we manage to avoid copy relocs for the
5432 symbol. */
5433 dodyn:
5434 if ((info->shared
5435 && (must_be_dyn_reloc (info, r_type)
5436 || (h != NULL
5437 && (! info->symbolic
5438 || h->root.type == bfd_link_hash_defweak
5439 || !h->def_regular))))
5440 || (ELIMINATE_COPY_RELOCS
5441 && !info->shared
5442 && h != NULL
5443 && (h->root.type == bfd_link_hash_defweak
5444 || !h->def_regular))
5445 || (!info->shared
5446 && ifunc != NULL))
5447 {
5448 struct elf_dyn_relocs *p;
5449 struct elf_dyn_relocs **head;
5450
5451 /* We must copy these reloc types into the output file.
5452 Create a reloc section in dynobj and make room for
5453 this reloc. */
5454 if (sreloc == NULL)
5455 {
5456 sreloc = _bfd_elf_make_dynamic_reloc_section
5457 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
5458
5459 if (sreloc == NULL)
5460 return FALSE;
5461 }
5462
5463 /* If this is a global symbol, we count the number of
5464 relocations we need for this symbol. */
5465 if (h != NULL)
5466 {
5467 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
5468 }
5469 else
5470 {
5471 /* Track dynamic relocs needed for local syms too.
5472 We really need local syms available to do this
5473 easily. Oh well. */
5474 asection *s;
5475 void *vpp;
5476 Elf_Internal_Sym *isym;
5477
5478 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5479 abfd, r_symndx);
5480 if (isym == NULL)
5481 return FALSE;
5482
5483 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5484 if (s == NULL)
5485 s = sec;
5486
5487 vpp = &elf_section_data (s)->local_dynrel;
5488 head = (struct elf_dyn_relocs **) vpp;
5489 }
5490
5491 p = *head;
5492 if (p == NULL || p->sec != sec)
5493 {
5494 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5495 if (p == NULL)
5496 return FALSE;
5497 p->next = *head;
5498 *head = p;
5499 p->sec = sec;
5500 p->count = 0;
5501 p->pc_count = 0;
5502 }
5503
5504 p->count += 1;
5505 if (!must_be_dyn_reloc (info, r_type))
5506 p->pc_count += 1;
5507 }
5508 break;
5509
5510 default:
5511 break;
5512 }
5513 }
5514
5515 return TRUE;
5516 }
5517
5518 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
5519 of the code entry point, and its section. */
5520
5521 static bfd_vma
5522 opd_entry_value (asection *opd_sec,
5523 bfd_vma offset,
5524 asection **code_sec,
5525 bfd_vma *code_off)
5526 {
5527 bfd *opd_bfd = opd_sec->owner;
5528 Elf_Internal_Rela *relocs;
5529 Elf_Internal_Rela *lo, *hi, *look;
5530 bfd_vma val;
5531
5532 /* No relocs implies we are linking a --just-symbols object, or looking
5533 at a final linked executable with addr2line or somesuch. */
5534 if (opd_sec->reloc_count == 0)
5535 {
5536 char buf[8];
5537
5538 if (!bfd_get_section_contents (opd_bfd, opd_sec, buf, offset, 8))
5539 return (bfd_vma) -1;
5540
5541 val = bfd_get_64 (opd_bfd, buf);
5542 if (code_sec != NULL)
5543 {
5544 asection *sec, *likely = NULL;
5545 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
5546 if (sec->vma <= val
5547 && (sec->flags & SEC_LOAD) != 0
5548 && (sec->flags & SEC_ALLOC) != 0)
5549 likely = sec;
5550 if (likely != NULL)
5551 {
5552 *code_sec = likely;
5553 if (code_off != NULL)
5554 *code_off = val - likely->vma;
5555 }
5556 }
5557 return val;
5558 }
5559
5560 BFD_ASSERT (is_ppc64_elf (opd_bfd));
5561
5562 relocs = ppc64_elf_tdata (opd_bfd)->opd_relocs;
5563 if (relocs == NULL)
5564 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
5565
5566 /* Go find the opd reloc at the sym address. */
5567 lo = relocs;
5568 BFD_ASSERT (lo != NULL);
5569 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
5570 val = (bfd_vma) -1;
5571 while (lo < hi)
5572 {
5573 look = lo + (hi - lo) / 2;
5574 if (look->r_offset < offset)
5575 lo = look + 1;
5576 else if (look->r_offset > offset)
5577 hi = look;
5578 else
5579 {
5580 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (opd_bfd);
5581
5582 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
5583 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
5584 {
5585 unsigned long symndx = ELF64_R_SYM (look->r_info);
5586 asection *sec;
5587
5588 if (symndx < symtab_hdr->sh_info)
5589 {
5590 Elf_Internal_Sym *sym;
5591
5592 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
5593 if (sym == NULL)
5594 {
5595 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
5596 symtab_hdr->sh_info,
5597 0, NULL, NULL, NULL);
5598 if (sym == NULL)
5599 break;
5600 symtab_hdr->contents = (bfd_byte *) sym;
5601 }
5602
5603 sym += symndx;
5604 val = sym->st_value;
5605 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
5606 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
5607 }
5608 else
5609 {
5610 struct elf_link_hash_entry **sym_hashes;
5611 struct elf_link_hash_entry *rh;
5612
5613 sym_hashes = elf_sym_hashes (opd_bfd);
5614 rh = sym_hashes[symndx - symtab_hdr->sh_info];
5615 rh = elf_follow_link (rh);
5616 BFD_ASSERT (rh->root.type == bfd_link_hash_defined
5617 || rh->root.type == bfd_link_hash_defweak);
5618 val = rh->root.u.def.value;
5619 sec = rh->root.u.def.section;
5620 }
5621 val += look->r_addend;
5622 if (code_off != NULL)
5623 *code_off = val;
5624 if (code_sec != NULL)
5625 *code_sec = sec;
5626 if (sec != NULL && sec->output_section != NULL)
5627 val += sec->output_section->vma + sec->output_offset;
5628 }
5629 break;
5630 }
5631 }
5632
5633 return val;
5634 }
5635
5636 /* Return TRUE iff the ELF symbol SYM might be a function. Set *CODE_SEC
5637 and *CODE_OFF to the function's entry point. */
5638
5639 static bfd_boolean
5640 ppc64_elf_maybe_function_sym (const asymbol *sym,
5641 asection **code_sec, bfd_vma *code_off)
5642 {
5643 if (_bfd_elf_maybe_function_sym (sym, code_sec, code_off))
5644 {
5645 if (strcmp (sym->section->name, ".opd") == 0)
5646 opd_entry_value (sym->section, sym->value, code_sec, code_off);
5647 return TRUE;
5648 }
5649 return FALSE;
5650 }
5651
5652 /* Return true if symbol is defined in a regular object file. */
5653
5654 static bfd_boolean
5655 is_static_defined (struct elf_link_hash_entry *h)
5656 {
5657 return ((h->root.type == bfd_link_hash_defined
5658 || h->root.type == bfd_link_hash_defweak)
5659 && h->root.u.def.section != NULL
5660 && h->root.u.def.section->output_section != NULL);
5661 }
5662
5663 /* If FDH is a function descriptor symbol, return the associated code
5664 entry symbol if it is defined. Return NULL otherwise. */
5665
5666 static struct ppc_link_hash_entry *
5667 defined_code_entry (struct ppc_link_hash_entry *fdh)
5668 {
5669 if (fdh->is_func_descriptor)
5670 {
5671 struct ppc_link_hash_entry *fh = ppc_follow_link (fdh->oh);
5672 if (fh->elf.root.type == bfd_link_hash_defined
5673 || fh->elf.root.type == bfd_link_hash_defweak)
5674 return fh;
5675 }
5676 return NULL;
5677 }
5678
5679 /* If FH is a function code entry symbol, return the associated
5680 function descriptor symbol if it is defined. Return NULL otherwise. */
5681
5682 static struct ppc_link_hash_entry *
5683 defined_func_desc (struct ppc_link_hash_entry *fh)
5684 {
5685 if (fh->oh != NULL
5686 && fh->oh->is_func_descriptor)
5687 {
5688 struct ppc_link_hash_entry *fdh = ppc_follow_link (fh->oh);
5689 if (fdh->elf.root.type == bfd_link_hash_defined
5690 || fdh->elf.root.type == bfd_link_hash_defweak)
5691 return fdh;
5692 }
5693 return NULL;
5694 }
5695
5696 /* Mark all our entry sym sections, both opd and code section. */
5697
5698 static void
5699 ppc64_elf_gc_keep (struct bfd_link_info *info)
5700 {
5701 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5702 struct bfd_sym_chain *sym;
5703
5704 if (htab == NULL)
5705 return;
5706
5707 for (sym = info->gc_sym_list; sym != NULL; sym = sym->next)
5708 {
5709 struct ppc_link_hash_entry *eh, *fh;
5710 asection *sec;
5711
5712 eh = (struct ppc_link_hash_entry *)
5713 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, TRUE);
5714 if (eh == NULL)
5715 continue;
5716 if (eh->elf.root.type != bfd_link_hash_defined
5717 && eh->elf.root.type != bfd_link_hash_defweak)
5718 continue;
5719
5720 fh = defined_code_entry (eh);
5721 if (fh != NULL)
5722 {
5723 sec = fh->elf.root.u.def.section;
5724 sec->flags |= SEC_KEEP;
5725 }
5726 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5727 && opd_entry_value (eh->elf.root.u.def.section,
5728 eh->elf.root.u.def.value,
5729 &sec, NULL) != (bfd_vma) -1)
5730 sec->flags |= SEC_KEEP;
5731
5732 sec = eh->elf.root.u.def.section;
5733 sec->flags |= SEC_KEEP;
5734 }
5735 }
5736
5737 /* Mark sections containing dynamically referenced symbols. When
5738 building shared libraries, we must assume that any visible symbol is
5739 referenced. */
5740
5741 static bfd_boolean
5742 ppc64_elf_gc_mark_dynamic_ref (struct elf_link_hash_entry *h, void *inf)
5743 {
5744 struct bfd_link_info *info = (struct bfd_link_info *) inf;
5745 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
5746 struct ppc_link_hash_entry *fdh;
5747
5748 /* Dynamic linking info is on the func descriptor sym. */
5749 fdh = defined_func_desc (eh);
5750 if (fdh != NULL)
5751 eh = fdh;
5752
5753 if ((eh->elf.root.type == bfd_link_hash_defined
5754 || eh->elf.root.type == bfd_link_hash_defweak)
5755 && (eh->elf.ref_dynamic
5756 || (!info->executable
5757 && eh->elf.def_regular
5758 && ELF_ST_VISIBILITY (eh->elf.other) != STV_INTERNAL
5759 && ELF_ST_VISIBILITY (eh->elf.other) != STV_HIDDEN
5760 && (strchr (eh->elf.root.root.string, ELF_VER_CHR) != NULL
5761 || !bfd_hide_sym_by_version (info->version_info,
5762 eh->elf.root.root.string)))))
5763 {
5764 asection *code_sec;
5765 struct ppc_link_hash_entry *fh;
5766
5767 eh->elf.root.u.def.section->flags |= SEC_KEEP;
5768
5769 /* Function descriptor syms cause the associated
5770 function code sym section to be marked. */
5771 fh = defined_code_entry (eh);
5772 if (fh != NULL)
5773 {
5774 code_sec = fh->elf.root.u.def.section;
5775 code_sec->flags |= SEC_KEEP;
5776 }
5777 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5778 && opd_entry_value (eh->elf.root.u.def.section,
5779 eh->elf.root.u.def.value,
5780 &code_sec, NULL) != (bfd_vma) -1)
5781 code_sec->flags |= SEC_KEEP;
5782 }
5783
5784 return TRUE;
5785 }
5786
5787 /* Return the section that should be marked against GC for a given
5788 relocation. */
5789
5790 static asection *
5791 ppc64_elf_gc_mark_hook (asection *sec,
5792 struct bfd_link_info *info,
5793 Elf_Internal_Rela *rel,
5794 struct elf_link_hash_entry *h,
5795 Elf_Internal_Sym *sym)
5796 {
5797 asection *rsec;
5798
5799 /* Syms return NULL if we're marking .opd, so we avoid marking all
5800 function sections, as all functions are referenced in .opd. */
5801 rsec = NULL;
5802 if (get_opd_info (sec) != NULL)
5803 return rsec;
5804
5805 if (h != NULL)
5806 {
5807 enum elf_ppc64_reloc_type r_type;
5808 struct ppc_link_hash_entry *eh, *fh, *fdh;
5809
5810 r_type = ELF64_R_TYPE (rel->r_info);
5811 switch (r_type)
5812 {
5813 case R_PPC64_GNU_VTINHERIT:
5814 case R_PPC64_GNU_VTENTRY:
5815 break;
5816
5817 default:
5818 switch (h->root.type)
5819 {
5820 case bfd_link_hash_defined:
5821 case bfd_link_hash_defweak:
5822 eh = (struct ppc_link_hash_entry *) h;
5823 fdh = defined_func_desc (eh);
5824 if (fdh != NULL)
5825 eh = fdh;
5826
5827 /* Function descriptor syms cause the associated
5828 function code sym section to be marked. */
5829 fh = defined_code_entry (eh);
5830 if (fh != NULL)
5831 {
5832 /* They also mark their opd section. */
5833 eh->elf.root.u.def.section->gc_mark = 1;
5834
5835 rsec = fh->elf.root.u.def.section;
5836 }
5837 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5838 && opd_entry_value (eh->elf.root.u.def.section,
5839 eh->elf.root.u.def.value,
5840 &rsec, NULL) != (bfd_vma) -1)
5841 eh->elf.root.u.def.section->gc_mark = 1;
5842 else
5843 rsec = h->root.u.def.section;
5844 break;
5845
5846 case bfd_link_hash_common:
5847 rsec = h->root.u.c.p->section;
5848 break;
5849
5850 default:
5851 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
5852 }
5853 }
5854 }
5855 else
5856 {
5857 struct _opd_sec_data *opd;
5858
5859 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
5860 opd = get_opd_info (rsec);
5861 if (opd != NULL && opd->func_sec != NULL)
5862 {
5863 rsec->gc_mark = 1;
5864
5865 rsec = opd->func_sec[(sym->st_value + rel->r_addend) / 8];
5866 }
5867 }
5868
5869 return rsec;
5870 }
5871
5872 /* Update the .got, .plt. and dynamic reloc reference counts for the
5873 section being removed. */
5874
5875 static bfd_boolean
5876 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
5877 asection *sec, const Elf_Internal_Rela *relocs)
5878 {
5879 struct ppc_link_hash_table *htab;
5880 Elf_Internal_Shdr *symtab_hdr;
5881 struct elf_link_hash_entry **sym_hashes;
5882 struct got_entry **local_got_ents;
5883 const Elf_Internal_Rela *rel, *relend;
5884
5885 if (info->relocatable)
5886 return TRUE;
5887
5888 if ((sec->flags & SEC_ALLOC) == 0)
5889 return TRUE;
5890
5891 elf_section_data (sec)->local_dynrel = NULL;
5892
5893 htab = ppc_hash_table (info);
5894 if (htab == NULL)
5895 return FALSE;
5896
5897 symtab_hdr = &elf_symtab_hdr (abfd);
5898 sym_hashes = elf_sym_hashes (abfd);
5899 local_got_ents = elf_local_got_ents (abfd);
5900
5901 relend = relocs + sec->reloc_count;
5902 for (rel = relocs; rel < relend; rel++)
5903 {
5904 unsigned long r_symndx;
5905 enum elf_ppc64_reloc_type r_type;
5906 struct elf_link_hash_entry *h = NULL;
5907 unsigned char tls_type = 0;
5908
5909 r_symndx = ELF64_R_SYM (rel->r_info);
5910 r_type = ELF64_R_TYPE (rel->r_info);
5911 if (r_symndx >= symtab_hdr->sh_info)
5912 {
5913 struct ppc_link_hash_entry *eh;
5914 struct elf_dyn_relocs **pp;
5915 struct elf_dyn_relocs *p;
5916
5917 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5918 h = elf_follow_link (h);
5919 eh = (struct ppc_link_hash_entry *) h;
5920
5921 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
5922 if (p->sec == sec)
5923 {
5924 /* Everything must go for SEC. */
5925 *pp = p->next;
5926 break;
5927 }
5928 }
5929
5930 if (is_branch_reloc (r_type))
5931 {
5932 struct plt_entry **ifunc = NULL;
5933 if (h != NULL)
5934 {
5935 if (h->type == STT_GNU_IFUNC)
5936 ifunc = &h->plt.plist;
5937 }
5938 else if (local_got_ents != NULL)
5939 {
5940 struct plt_entry **local_plt = (struct plt_entry **)
5941 (local_got_ents + symtab_hdr->sh_info);
5942 unsigned char *local_got_tls_masks = (unsigned char *)
5943 (local_plt + symtab_hdr->sh_info);
5944 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
5945 ifunc = local_plt + r_symndx;
5946 }
5947 if (ifunc != NULL)
5948 {
5949 struct plt_entry *ent;
5950
5951 for (ent = *ifunc; ent != NULL; ent = ent->next)
5952 if (ent->addend == rel->r_addend)
5953 break;
5954 if (ent == NULL)
5955 abort ();
5956 if (ent->plt.refcount > 0)
5957 ent->plt.refcount -= 1;
5958 continue;
5959 }
5960 }
5961
5962 switch (r_type)
5963 {
5964 case R_PPC64_GOT_TLSLD16:
5965 case R_PPC64_GOT_TLSLD16_LO:
5966 case R_PPC64_GOT_TLSLD16_HI:
5967 case R_PPC64_GOT_TLSLD16_HA:
5968 tls_type = TLS_TLS | TLS_LD;
5969 goto dogot;
5970
5971 case R_PPC64_GOT_TLSGD16:
5972 case R_PPC64_GOT_TLSGD16_LO:
5973 case R_PPC64_GOT_TLSGD16_HI:
5974 case R_PPC64_GOT_TLSGD16_HA:
5975 tls_type = TLS_TLS | TLS_GD;
5976 goto dogot;
5977
5978 case R_PPC64_GOT_TPREL16_DS:
5979 case R_PPC64_GOT_TPREL16_LO_DS:
5980 case R_PPC64_GOT_TPREL16_HI:
5981 case R_PPC64_GOT_TPREL16_HA:
5982 tls_type = TLS_TLS | TLS_TPREL;
5983 goto dogot;
5984
5985 case R_PPC64_GOT_DTPREL16_DS:
5986 case R_PPC64_GOT_DTPREL16_LO_DS:
5987 case R_PPC64_GOT_DTPREL16_HI:
5988 case R_PPC64_GOT_DTPREL16_HA:
5989 tls_type = TLS_TLS | TLS_DTPREL;
5990 goto dogot;
5991
5992 case R_PPC64_GOT16:
5993 case R_PPC64_GOT16_DS:
5994 case R_PPC64_GOT16_HA:
5995 case R_PPC64_GOT16_HI:
5996 case R_PPC64_GOT16_LO:
5997 case R_PPC64_GOT16_LO_DS:
5998 dogot:
5999 {
6000 struct got_entry *ent;
6001
6002 if (h != NULL)
6003 ent = h->got.glist;
6004 else
6005 ent = local_got_ents[r_symndx];
6006
6007 for (; ent != NULL; ent = ent->next)
6008 if (ent->addend == rel->r_addend
6009 && ent->owner == abfd
6010 && ent->tls_type == tls_type)
6011 break;
6012 if (ent == NULL)
6013 abort ();
6014 if (ent->got.refcount > 0)
6015 ent->got.refcount -= 1;
6016 }
6017 break;
6018
6019 case R_PPC64_PLT16_HA:
6020 case R_PPC64_PLT16_HI:
6021 case R_PPC64_PLT16_LO:
6022 case R_PPC64_PLT32:
6023 case R_PPC64_PLT64:
6024 case R_PPC64_REL14:
6025 case R_PPC64_REL14_BRNTAKEN:
6026 case R_PPC64_REL14_BRTAKEN:
6027 case R_PPC64_REL24:
6028 if (h != NULL)
6029 {
6030 struct plt_entry *ent;
6031
6032 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6033 if (ent->addend == rel->r_addend)
6034 break;
6035 if (ent != NULL && ent->plt.refcount > 0)
6036 ent->plt.refcount -= 1;
6037 }
6038 break;
6039
6040 default:
6041 break;
6042 }
6043 }
6044 return TRUE;
6045 }
6046
6047 /* The maximum size of .sfpr. */
6048 #define SFPR_MAX (218*4)
6049
6050 struct sfpr_def_parms
6051 {
6052 const char name[12];
6053 unsigned char lo, hi;
6054 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
6055 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
6056 };
6057
6058 /* Auto-generate _save*, _rest* functions in .sfpr. */
6059
6060 static bfd_boolean
6061 sfpr_define (struct bfd_link_info *info, const struct sfpr_def_parms *parm)
6062 {
6063 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6064 unsigned int i;
6065 size_t len = strlen (parm->name);
6066 bfd_boolean writing = FALSE;
6067 char sym[16];
6068
6069 if (htab == NULL)
6070 return FALSE;
6071
6072 memcpy (sym, parm->name, len);
6073 sym[len + 2] = 0;
6074
6075 for (i = parm->lo; i <= parm->hi; i++)
6076 {
6077 struct elf_link_hash_entry *h;
6078
6079 sym[len + 0] = i / 10 + '0';
6080 sym[len + 1] = i % 10 + '0';
6081 h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
6082 if (h != NULL
6083 && !h->def_regular)
6084 {
6085 h->root.type = bfd_link_hash_defined;
6086 h->root.u.def.section = htab->sfpr;
6087 h->root.u.def.value = htab->sfpr->size;
6088 h->type = STT_FUNC;
6089 h->def_regular = 1;
6090 _bfd_elf_link_hash_hide_symbol (info, h, TRUE);
6091 writing = TRUE;
6092 if (htab->sfpr->contents == NULL)
6093 {
6094 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
6095 if (htab->sfpr->contents == NULL)
6096 return FALSE;
6097 }
6098 }
6099 if (writing)
6100 {
6101 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
6102 if (i != parm->hi)
6103 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
6104 else
6105 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
6106 htab->sfpr->size = p - htab->sfpr->contents;
6107 }
6108 }
6109
6110 return TRUE;
6111 }
6112
6113 static bfd_byte *
6114 savegpr0 (bfd *abfd, bfd_byte *p, int r)
6115 {
6116 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6117 return p + 4;
6118 }
6119
6120 static bfd_byte *
6121 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
6122 {
6123 p = savegpr0 (abfd, p, r);
6124 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
6125 p = p + 4;
6126 bfd_put_32 (abfd, BLR, p);
6127 return p + 4;
6128 }
6129
6130 static bfd_byte *
6131 restgpr0 (bfd *abfd, bfd_byte *p, int r)
6132 {
6133 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6134 return p + 4;
6135 }
6136
6137 static bfd_byte *
6138 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
6139 {
6140 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
6141 p = p + 4;
6142 p = restgpr0 (abfd, p, r);
6143 bfd_put_32 (abfd, MTLR_R0, p);
6144 p = p + 4;
6145 if (r == 29)
6146 {
6147 p = restgpr0 (abfd, p, 30);
6148 p = restgpr0 (abfd, p, 31);
6149 }
6150 bfd_put_32 (abfd, BLR, p);
6151 return p + 4;
6152 }
6153
6154 static bfd_byte *
6155 savegpr1 (bfd *abfd, bfd_byte *p, int r)
6156 {
6157 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6158 return p + 4;
6159 }
6160
6161 static bfd_byte *
6162 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
6163 {
6164 p = savegpr1 (abfd, p, r);
6165 bfd_put_32 (abfd, BLR, p);
6166 return p + 4;
6167 }
6168
6169 static bfd_byte *
6170 restgpr1 (bfd *abfd, bfd_byte *p, int r)
6171 {
6172 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6173 return p + 4;
6174 }
6175
6176 static bfd_byte *
6177 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
6178 {
6179 p = restgpr1 (abfd, p, r);
6180 bfd_put_32 (abfd, BLR, p);
6181 return p + 4;
6182 }
6183
6184 static bfd_byte *
6185 savefpr (bfd *abfd, bfd_byte *p, int r)
6186 {
6187 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6188 return p + 4;
6189 }
6190
6191 static bfd_byte *
6192 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
6193 {
6194 p = savefpr (abfd, p, r);
6195 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
6196 p = p + 4;
6197 bfd_put_32 (abfd, BLR, p);
6198 return p + 4;
6199 }
6200
6201 static bfd_byte *
6202 restfpr (bfd *abfd, bfd_byte *p, int r)
6203 {
6204 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6205 return p + 4;
6206 }
6207
6208 static bfd_byte *
6209 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
6210 {
6211 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
6212 p = p + 4;
6213 p = restfpr (abfd, p, r);
6214 bfd_put_32 (abfd, MTLR_R0, p);
6215 p = p + 4;
6216 if (r == 29)
6217 {
6218 p = restfpr (abfd, p, 30);
6219 p = restfpr (abfd, p, 31);
6220 }
6221 bfd_put_32 (abfd, BLR, p);
6222 return p + 4;
6223 }
6224
6225 static bfd_byte *
6226 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
6227 {
6228 p = savefpr (abfd, p, r);
6229 bfd_put_32 (abfd, BLR, p);
6230 return p + 4;
6231 }
6232
6233 static bfd_byte *
6234 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
6235 {
6236 p = restfpr (abfd, p, r);
6237 bfd_put_32 (abfd, BLR, p);
6238 return p + 4;
6239 }
6240
6241 static bfd_byte *
6242 savevr (bfd *abfd, bfd_byte *p, int r)
6243 {
6244 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6245 p = p + 4;
6246 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
6247 return p + 4;
6248 }
6249
6250 static bfd_byte *
6251 savevr_tail (bfd *abfd, bfd_byte *p, int r)
6252 {
6253 p = savevr (abfd, p, r);
6254 bfd_put_32 (abfd, BLR, p);
6255 return p + 4;
6256 }
6257
6258 static bfd_byte *
6259 restvr (bfd *abfd, bfd_byte *p, int r)
6260 {
6261 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6262 p = p + 4;
6263 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
6264 return p + 4;
6265 }
6266
6267 static bfd_byte *
6268 restvr_tail (bfd *abfd, bfd_byte *p, int r)
6269 {
6270 p = restvr (abfd, p, r);
6271 bfd_put_32 (abfd, BLR, p);
6272 return p + 4;
6273 }
6274
6275 /* Called via elf_link_hash_traverse to transfer dynamic linking
6276 information on function code symbol entries to their corresponding
6277 function descriptor symbol entries. */
6278
6279 static bfd_boolean
6280 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
6281 {
6282 struct bfd_link_info *info;
6283 struct ppc_link_hash_table *htab;
6284 struct plt_entry *ent;
6285 struct ppc_link_hash_entry *fh;
6286 struct ppc_link_hash_entry *fdh;
6287 bfd_boolean force_local;
6288
6289 fh = (struct ppc_link_hash_entry *) h;
6290 if (fh->elf.root.type == bfd_link_hash_indirect)
6291 return TRUE;
6292
6293 info = inf;
6294 htab = ppc_hash_table (info);
6295 if (htab == NULL)
6296 return FALSE;
6297
6298 /* Resolve undefined references to dot-symbols as the value
6299 in the function descriptor, if we have one in a regular object.
6300 This is to satisfy cases like ".quad .foo". Calls to functions
6301 in dynamic objects are handled elsewhere. */
6302 if (fh->elf.root.type == bfd_link_hash_undefweak
6303 && fh->was_undefined
6304 && (fdh = defined_func_desc (fh)) != NULL
6305 && get_opd_info (fdh->elf.root.u.def.section) != NULL
6306 && opd_entry_value (fdh->elf.root.u.def.section,
6307 fdh->elf.root.u.def.value,
6308 &fh->elf.root.u.def.section,
6309 &fh->elf.root.u.def.value) != (bfd_vma) -1)
6310 {
6311 fh->elf.root.type = fdh->elf.root.type;
6312 fh->elf.forced_local = 1;
6313 fh->elf.def_regular = fdh->elf.def_regular;
6314 fh->elf.def_dynamic = fdh->elf.def_dynamic;
6315 }
6316
6317 /* If this is a function code symbol, transfer dynamic linking
6318 information to the function descriptor symbol. */
6319 if (!fh->is_func)
6320 return TRUE;
6321
6322 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
6323 if (ent->plt.refcount > 0)
6324 break;
6325 if (ent == NULL
6326 || fh->elf.root.root.string[0] != '.'
6327 || fh->elf.root.root.string[1] == '\0')
6328 return TRUE;
6329
6330 /* Find the corresponding function descriptor symbol. Create it
6331 as undefined if necessary. */
6332
6333 fdh = lookup_fdh (fh, htab);
6334 if (fdh == NULL
6335 && !info->executable
6336 && (fh->elf.root.type == bfd_link_hash_undefined
6337 || fh->elf.root.type == bfd_link_hash_undefweak))
6338 {
6339 fdh = make_fdh (info, fh);
6340 if (fdh == NULL)
6341 return FALSE;
6342 }
6343
6344 /* Fake function descriptors are made undefweak. If the function
6345 code symbol is strong undefined, make the fake sym the same.
6346 If the function code symbol is defined, then force the fake
6347 descriptor local; We can't support overriding of symbols in a
6348 shared library on a fake descriptor. */
6349
6350 if (fdh != NULL
6351 && fdh->fake
6352 && fdh->elf.root.type == bfd_link_hash_undefweak)
6353 {
6354 if (fh->elf.root.type == bfd_link_hash_undefined)
6355 {
6356 fdh->elf.root.type = bfd_link_hash_undefined;
6357 bfd_link_add_undef (&htab->elf.root, &fdh->elf.root);
6358 }
6359 else if (fh->elf.root.type == bfd_link_hash_defined
6360 || fh->elf.root.type == bfd_link_hash_defweak)
6361 {
6362 _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE);
6363 }
6364 }
6365
6366 if (fdh != NULL
6367 && !fdh->elf.forced_local
6368 && (!info->executable
6369 || fdh->elf.def_dynamic
6370 || fdh->elf.ref_dynamic
6371 || (fdh->elf.root.type == bfd_link_hash_undefweak
6372 && ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT)))
6373 {
6374 if (fdh->elf.dynindx == -1)
6375 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
6376 return FALSE;
6377 fdh->elf.ref_regular |= fh->elf.ref_regular;
6378 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
6379 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
6380 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
6381 if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT)
6382 {
6383 move_plt_plist (fh, fdh);
6384 fdh->elf.needs_plt = 1;
6385 }
6386 fdh->is_func_descriptor = 1;
6387 fdh->oh = fh;
6388 fh->oh = fdh;
6389 }
6390
6391 /* Now that the info is on the function descriptor, clear the
6392 function code sym info. Any function code syms for which we
6393 don't have a definition in a regular file, we force local.
6394 This prevents a shared library from exporting syms that have
6395 been imported from another library. Function code syms that
6396 are really in the library we must leave global to prevent the
6397 linker dragging in a definition from a static library. */
6398 force_local = (!fh->elf.def_regular
6399 || fdh == NULL
6400 || !fdh->elf.def_regular
6401 || fdh->elf.forced_local);
6402 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
6403
6404 return TRUE;
6405 }
6406
6407 /* Called near the start of bfd_elf_size_dynamic_sections. We use
6408 this hook to a) provide some gcc support functions, and b) transfer
6409 dynamic linking information gathered so far on function code symbol
6410 entries, to their corresponding function descriptor symbol entries. */
6411
6412 static bfd_boolean
6413 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
6414 struct bfd_link_info *info)
6415 {
6416 struct ppc_link_hash_table *htab;
6417 unsigned int i;
6418 const struct sfpr_def_parms funcs[] =
6419 {
6420 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
6421 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
6422 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
6423 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
6424 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
6425 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
6426 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
6427 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
6428 { "._savef", 14, 31, savefpr, savefpr1_tail },
6429 { "._restf", 14, 31, restfpr, restfpr1_tail },
6430 { "_savevr_", 20, 31, savevr, savevr_tail },
6431 { "_restvr_", 20, 31, restvr, restvr_tail }
6432 };
6433
6434 htab = ppc_hash_table (info);
6435 if (htab == NULL)
6436 return FALSE;
6437
6438 if (htab->sfpr == NULL)
6439 /* We don't have any relocs. */
6440 return TRUE;
6441
6442 /* Provide any missing _save* and _rest* functions. */
6443 htab->sfpr->size = 0;
6444 for (i = 0; i < sizeof (funcs) / sizeof (funcs[0]); i++)
6445 if (!sfpr_define (info, &funcs[i]))
6446 return FALSE;
6447
6448 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
6449
6450 if (htab->sfpr->size == 0)
6451 htab->sfpr->flags |= SEC_EXCLUDE;
6452
6453 return TRUE;
6454 }
6455
6456 /* Adjust a symbol defined by a dynamic object and referenced by a
6457 regular object. The current definition is in some section of the
6458 dynamic object, but we're not including those sections. We have to
6459 change the definition to something the rest of the link can
6460 understand. */
6461
6462 static bfd_boolean
6463 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
6464 struct elf_link_hash_entry *h)
6465 {
6466 struct ppc_link_hash_table *htab;
6467 asection *s;
6468
6469 htab = ppc_hash_table (info);
6470 if (htab == NULL)
6471 return FALSE;
6472
6473 /* Deal with function syms. */
6474 if (h->type == STT_FUNC
6475 || h->type == STT_GNU_IFUNC
6476 || h->needs_plt)
6477 {
6478 /* Clear procedure linkage table information for any symbol that
6479 won't need a .plt entry. */
6480 struct plt_entry *ent;
6481 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6482 if (ent->plt.refcount > 0)
6483 break;
6484 if (ent == NULL
6485 || (h->type != STT_GNU_IFUNC
6486 && (SYMBOL_CALLS_LOCAL (info, h)
6487 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
6488 && h->root.type == bfd_link_hash_undefweak))))
6489 {
6490 h->plt.plist = NULL;
6491 h->needs_plt = 0;
6492 }
6493 }
6494 else
6495 h->plt.plist = NULL;
6496
6497 /* If this is a weak symbol, and there is a real definition, the
6498 processor independent code will have arranged for us to see the
6499 real definition first, and we can just use the same value. */
6500 if (h->u.weakdef != NULL)
6501 {
6502 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
6503 || h->u.weakdef->root.type == bfd_link_hash_defweak);
6504 h->root.u.def.section = h->u.weakdef->root.u.def.section;
6505 h->root.u.def.value = h->u.weakdef->root.u.def.value;
6506 if (ELIMINATE_COPY_RELOCS)
6507 h->non_got_ref = h->u.weakdef->non_got_ref;
6508 return TRUE;
6509 }
6510
6511 /* If we are creating a shared library, we must presume that the
6512 only references to the symbol are via the global offset table.
6513 For such cases we need not do anything here; the relocations will
6514 be handled correctly by relocate_section. */
6515 if (info->shared)
6516 return TRUE;
6517
6518 /* If there are no references to this symbol that do not use the
6519 GOT, we don't need to generate a copy reloc. */
6520 if (!h->non_got_ref)
6521 return TRUE;
6522
6523 /* Don't generate a copy reloc for symbols defined in the executable. */
6524 if (!h->def_dynamic || !h->ref_regular || h->def_regular)
6525 return TRUE;
6526
6527 if (ELIMINATE_COPY_RELOCS)
6528 {
6529 struct ppc_link_hash_entry * eh;
6530 struct elf_dyn_relocs *p;
6531
6532 eh = (struct ppc_link_hash_entry *) h;
6533 for (p = eh->dyn_relocs; p != NULL; p = p->next)
6534 {
6535 s = p->sec->output_section;
6536 if (s != NULL && (s->flags & SEC_READONLY) != 0)
6537 break;
6538 }
6539
6540 /* If we didn't find any dynamic relocs in read-only sections, then
6541 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
6542 if (p == NULL)
6543 {
6544 h->non_got_ref = 0;
6545 return TRUE;
6546 }
6547 }
6548
6549 if (h->plt.plist != NULL)
6550 {
6551 /* We should never get here, but unfortunately there are versions
6552 of gcc out there that improperly (for this ABI) put initialized
6553 function pointers, vtable refs and suchlike in read-only
6554 sections. Allow them to proceed, but warn that this might
6555 break at runtime. */
6556 info->callbacks->einfo
6557 (_("%P: copy reloc against `%s' requires lazy plt linking; "
6558 "avoid setting LD_BIND_NOW=1 or upgrade gcc\n"),
6559 h->root.root.string);
6560 }
6561
6562 /* This is a reference to a symbol defined by a dynamic object which
6563 is not a function. */
6564
6565 /* We must allocate the symbol in our .dynbss section, which will
6566 become part of the .bss section of the executable. There will be
6567 an entry for this symbol in the .dynsym section. The dynamic
6568 object will contain position independent code, so all references
6569 from the dynamic object to this symbol will go through the global
6570 offset table. The dynamic linker will use the .dynsym entry to
6571 determine the address it must put in the global offset table, so
6572 both the dynamic object and the regular object will refer to the
6573 same memory location for the variable. */
6574
6575 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
6576 to copy the initial value out of the dynamic object and into the
6577 runtime process image. We need to remember the offset into the
6578 .rela.bss section we are going to use. */
6579 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
6580 {
6581 htab->relbss->size += sizeof (Elf64_External_Rela);
6582 h->needs_copy = 1;
6583 }
6584
6585 s = htab->dynbss;
6586
6587 return _bfd_elf_adjust_dynamic_copy (h, s);
6588 }
6589
6590 /* If given a function descriptor symbol, hide both the function code
6591 sym and the descriptor. */
6592 static void
6593 ppc64_elf_hide_symbol (struct bfd_link_info *info,
6594 struct elf_link_hash_entry *h,
6595 bfd_boolean force_local)
6596 {
6597 struct ppc_link_hash_entry *eh;
6598 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
6599
6600 eh = (struct ppc_link_hash_entry *) h;
6601 if (eh->is_func_descriptor)
6602 {
6603 struct ppc_link_hash_entry *fh = eh->oh;
6604
6605 if (fh == NULL)
6606 {
6607 const char *p, *q;
6608 struct ppc_link_hash_table *htab;
6609 char save;
6610
6611 /* We aren't supposed to use alloca in BFD because on
6612 systems which do not have alloca the version in libiberty
6613 calls xmalloc, which might cause the program to crash
6614 when it runs out of memory. This function doesn't have a
6615 return status, so there's no way to gracefully return an
6616 error. So cheat. We know that string[-1] can be safely
6617 accessed; It's either a string in an ELF string table,
6618 or allocated in an objalloc structure. */
6619
6620 p = eh->elf.root.root.string - 1;
6621 save = *p;
6622 *(char *) p = '.';
6623 htab = ppc_hash_table (info);
6624 if (htab == NULL)
6625 return;
6626
6627 fh = (struct ppc_link_hash_entry *)
6628 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
6629 *(char *) p = save;
6630
6631 /* Unfortunately, if it so happens that the string we were
6632 looking for was allocated immediately before this string,
6633 then we overwrote the string terminator. That's the only
6634 reason the lookup should fail. */
6635 if (fh == NULL)
6636 {
6637 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
6638 while (q >= eh->elf.root.root.string && *q == *p)
6639 --q, --p;
6640 if (q < eh->elf.root.root.string && *p == '.')
6641 fh = (struct ppc_link_hash_entry *)
6642 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
6643 }
6644 if (fh != NULL)
6645 {
6646 eh->oh = fh;
6647 fh->oh = eh;
6648 }
6649 }
6650 if (fh != NULL)
6651 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
6652 }
6653 }
6654
6655 static bfd_boolean
6656 get_sym_h (struct elf_link_hash_entry **hp,
6657 Elf_Internal_Sym **symp,
6658 asection **symsecp,
6659 unsigned char **tls_maskp,
6660 Elf_Internal_Sym **locsymsp,
6661 unsigned long r_symndx,
6662 bfd *ibfd)
6663 {
6664 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
6665
6666 if (r_symndx >= symtab_hdr->sh_info)
6667 {
6668 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
6669 struct elf_link_hash_entry *h;
6670
6671 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
6672 h = elf_follow_link (h);
6673
6674 if (hp != NULL)
6675 *hp = h;
6676
6677 if (symp != NULL)
6678 *symp = NULL;
6679
6680 if (symsecp != NULL)
6681 {
6682 asection *symsec = NULL;
6683 if (h->root.type == bfd_link_hash_defined
6684 || h->root.type == bfd_link_hash_defweak)
6685 symsec = h->root.u.def.section;
6686 *symsecp = symsec;
6687 }
6688
6689 if (tls_maskp != NULL)
6690 {
6691 struct ppc_link_hash_entry *eh;
6692
6693 eh = (struct ppc_link_hash_entry *) h;
6694 *tls_maskp = &eh->tls_mask;
6695 }
6696 }
6697 else
6698 {
6699 Elf_Internal_Sym *sym;
6700 Elf_Internal_Sym *locsyms = *locsymsp;
6701
6702 if (locsyms == NULL)
6703 {
6704 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
6705 if (locsyms == NULL)
6706 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
6707 symtab_hdr->sh_info,
6708 0, NULL, NULL, NULL);
6709 if (locsyms == NULL)
6710 return FALSE;
6711 *locsymsp = locsyms;
6712 }
6713 sym = locsyms + r_symndx;
6714
6715 if (hp != NULL)
6716 *hp = NULL;
6717
6718 if (symp != NULL)
6719 *symp = sym;
6720
6721 if (symsecp != NULL)
6722 *symsecp = bfd_section_from_elf_index (ibfd, sym->st_shndx);
6723
6724 if (tls_maskp != NULL)
6725 {
6726 struct got_entry **lgot_ents;
6727 unsigned char *tls_mask;
6728
6729 tls_mask = NULL;
6730 lgot_ents = elf_local_got_ents (ibfd);
6731 if (lgot_ents != NULL)
6732 {
6733 struct plt_entry **local_plt = (struct plt_entry **)
6734 (lgot_ents + symtab_hdr->sh_info);
6735 unsigned char *lgot_masks = (unsigned char *)
6736 (local_plt + symtab_hdr->sh_info);
6737 tls_mask = &lgot_masks[r_symndx];
6738 }
6739 *tls_maskp = tls_mask;
6740 }
6741 }
6742 return TRUE;
6743 }
6744
6745 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
6746 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
6747 type suitable for optimization, and 1 otherwise. */
6748
6749 static int
6750 get_tls_mask (unsigned char **tls_maskp,
6751 unsigned long *toc_symndx,
6752 bfd_vma *toc_addend,
6753 Elf_Internal_Sym **locsymsp,
6754 const Elf_Internal_Rela *rel,
6755 bfd *ibfd)
6756 {
6757 unsigned long r_symndx;
6758 int next_r;
6759 struct elf_link_hash_entry *h;
6760 Elf_Internal_Sym *sym;
6761 asection *sec;
6762 bfd_vma off;
6763
6764 r_symndx = ELF64_R_SYM (rel->r_info);
6765 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
6766 return 0;
6767
6768 if ((*tls_maskp != NULL && **tls_maskp != 0)
6769 || sec == NULL
6770 || ppc64_elf_section_data (sec) == NULL
6771 || ppc64_elf_section_data (sec)->sec_type != sec_toc)
6772 return 1;
6773
6774 /* Look inside a TOC section too. */
6775 if (h != NULL)
6776 {
6777 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
6778 off = h->root.u.def.value;
6779 }
6780 else
6781 off = sym->st_value;
6782 off += rel->r_addend;
6783 BFD_ASSERT (off % 8 == 0);
6784 r_symndx = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8];
6785 next_r = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8 + 1];
6786 if (toc_symndx != NULL)
6787 *toc_symndx = r_symndx;
6788 if (toc_addend != NULL)
6789 *toc_addend = ppc64_elf_section_data (sec)->u.toc.add[off / 8];
6790 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
6791 return 0;
6792 if ((h == NULL || is_static_defined (h))
6793 && (next_r == -1 || next_r == -2))
6794 return 1 - next_r;
6795 return 1;
6796 }
6797
6798 /* Find (or create) an entry in the tocsave hash table. */
6799
6800 static struct tocsave_entry *
6801 tocsave_find (struct ppc_link_hash_table *htab,
6802 enum insert_option insert,
6803 Elf_Internal_Sym **local_syms,
6804 const Elf_Internal_Rela *irela,
6805 bfd *ibfd)
6806 {
6807 unsigned long r_indx;
6808 struct elf_link_hash_entry *h;
6809 Elf_Internal_Sym *sym;
6810 struct tocsave_entry ent, *p;
6811 hashval_t hash;
6812 struct tocsave_entry **slot;
6813
6814 r_indx = ELF64_R_SYM (irela->r_info);
6815 if (!get_sym_h (&h, &sym, &ent.sec, NULL, local_syms, r_indx, ibfd))
6816 return NULL;
6817 if (ent.sec == NULL || ent.sec->output_section == NULL)
6818 {
6819 (*_bfd_error_handler)
6820 (_("%B: undefined symbol on R_PPC64_TOCSAVE relocation"));
6821 return NULL;
6822 }
6823
6824 if (h != NULL)
6825 ent.offset = h->root.u.def.value;
6826 else
6827 ent.offset = sym->st_value;
6828 ent.offset += irela->r_addend;
6829
6830 hash = tocsave_htab_hash (&ent);
6831 slot = ((struct tocsave_entry **)
6832 htab_find_slot_with_hash (htab->tocsave_htab, &ent, hash, insert));
6833 if (slot == NULL)
6834 return NULL;
6835
6836 if (*slot == NULL)
6837 {
6838 p = (struct tocsave_entry *) bfd_alloc (ibfd, sizeof (*p));
6839 if (p == NULL)
6840 return NULL;
6841 *p = ent;
6842 *slot = p;
6843 }
6844 return *slot;
6845 }
6846
6847 /* Adjust all global syms defined in opd sections. In gcc generated
6848 code for the old ABI, these will already have been done. */
6849
6850 static bfd_boolean
6851 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
6852 {
6853 struct ppc_link_hash_entry *eh;
6854 asection *sym_sec;
6855 struct _opd_sec_data *opd;
6856
6857 if (h->root.type == bfd_link_hash_indirect)
6858 return TRUE;
6859
6860 if (h->root.type != bfd_link_hash_defined
6861 && h->root.type != bfd_link_hash_defweak)
6862 return TRUE;
6863
6864 eh = (struct ppc_link_hash_entry *) h;
6865 if (eh->adjust_done)
6866 return TRUE;
6867
6868 sym_sec = eh->elf.root.u.def.section;
6869 opd = get_opd_info (sym_sec);
6870 if (opd != NULL && opd->adjust != NULL)
6871 {
6872 long adjust = opd->adjust[eh->elf.root.u.def.value / 8];
6873 if (adjust == -1)
6874 {
6875 /* This entry has been deleted. */
6876 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
6877 if (dsec == NULL)
6878 {
6879 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
6880 if (elf_discarded_section (dsec))
6881 {
6882 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
6883 break;
6884 }
6885 }
6886 eh->elf.root.u.def.value = 0;
6887 eh->elf.root.u.def.section = dsec;
6888 }
6889 else
6890 eh->elf.root.u.def.value += adjust;
6891 eh->adjust_done = 1;
6892 }
6893 return TRUE;
6894 }
6895
6896 /* Handles decrementing dynamic reloc counts for the reloc specified by
6897 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM_SEC
6898 have already been determined. */
6899
6900 static bfd_boolean
6901 dec_dynrel_count (bfd_vma r_info,
6902 asection *sec,
6903 struct bfd_link_info *info,
6904 Elf_Internal_Sym **local_syms,
6905 struct elf_link_hash_entry *h,
6906 asection *sym_sec)
6907 {
6908 enum elf_ppc64_reloc_type r_type;
6909 struct elf_dyn_relocs *p;
6910 struct elf_dyn_relocs **pp;
6911
6912 /* Can this reloc be dynamic? This switch, and later tests here
6913 should be kept in sync with the code in check_relocs. */
6914 r_type = ELF64_R_TYPE (r_info);
6915 switch (r_type)
6916 {
6917 default:
6918 return TRUE;
6919
6920 case R_PPC64_TPREL16:
6921 case R_PPC64_TPREL16_LO:
6922 case R_PPC64_TPREL16_HI:
6923 case R_PPC64_TPREL16_HA:
6924 case R_PPC64_TPREL16_DS:
6925 case R_PPC64_TPREL16_LO_DS:
6926 case R_PPC64_TPREL16_HIGHER:
6927 case R_PPC64_TPREL16_HIGHERA:
6928 case R_PPC64_TPREL16_HIGHEST:
6929 case R_PPC64_TPREL16_HIGHESTA:
6930 if (!info->shared)
6931 return TRUE;
6932
6933 case R_PPC64_TPREL64:
6934 case R_PPC64_DTPMOD64:
6935 case R_PPC64_DTPREL64:
6936 case R_PPC64_ADDR64:
6937 case R_PPC64_REL30:
6938 case R_PPC64_REL32:
6939 case R_PPC64_REL64:
6940 case R_PPC64_ADDR14:
6941 case R_PPC64_ADDR14_BRNTAKEN:
6942 case R_PPC64_ADDR14_BRTAKEN:
6943 case R_PPC64_ADDR16:
6944 case R_PPC64_ADDR16_DS:
6945 case R_PPC64_ADDR16_HA:
6946 case R_PPC64_ADDR16_HI:
6947 case R_PPC64_ADDR16_HIGHER:
6948 case R_PPC64_ADDR16_HIGHERA:
6949 case R_PPC64_ADDR16_HIGHEST:
6950 case R_PPC64_ADDR16_HIGHESTA:
6951 case R_PPC64_ADDR16_LO:
6952 case R_PPC64_ADDR16_LO_DS:
6953 case R_PPC64_ADDR24:
6954 case R_PPC64_ADDR32:
6955 case R_PPC64_UADDR16:
6956 case R_PPC64_UADDR32:
6957 case R_PPC64_UADDR64:
6958 case R_PPC64_TOC:
6959 break;
6960 }
6961
6962 if (local_syms != NULL)
6963 {
6964 unsigned long r_symndx;
6965 Elf_Internal_Sym *sym;
6966 bfd *ibfd = sec->owner;
6967
6968 r_symndx = ELF64_R_SYM (r_info);
6969 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
6970 return FALSE;
6971 }
6972
6973 if ((info->shared
6974 && (must_be_dyn_reloc (info, r_type)
6975 || (h != NULL
6976 && (!info->symbolic
6977 || h->root.type == bfd_link_hash_defweak
6978 || !h->def_regular))))
6979 || (ELIMINATE_COPY_RELOCS
6980 && !info->shared
6981 && h != NULL
6982 && (h->root.type == bfd_link_hash_defweak
6983 || !h->def_regular)))
6984 ;
6985 else
6986 return TRUE;
6987
6988 if (h != NULL)
6989 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
6990 else
6991 {
6992 if (sym_sec != NULL)
6993 {
6994 void *vpp = &elf_section_data (sym_sec)->local_dynrel;
6995 pp = (struct elf_dyn_relocs **) vpp;
6996 }
6997 else
6998 {
6999 void *vpp = &elf_section_data (sec)->local_dynrel;
7000 pp = (struct elf_dyn_relocs **) vpp;
7001 }
7002
7003 /* elf_gc_sweep may have already removed all dyn relocs associated
7004 with local syms for a given section. Don't report a dynreloc
7005 miscount. */
7006 if (*pp == NULL)
7007 return TRUE;
7008 }
7009
7010 while ((p = *pp) != NULL)
7011 {
7012 if (p->sec == sec)
7013 {
7014 if (!must_be_dyn_reloc (info, r_type))
7015 p->pc_count -= 1;
7016 p->count -= 1;
7017 if (p->count == 0)
7018 *pp = p->next;
7019 return TRUE;
7020 }
7021 pp = &p->next;
7022 }
7023
7024 info->callbacks->einfo (_("%P: dynreloc miscount for %B, section %A\n"),
7025 sec->owner, sec);
7026 bfd_set_error (bfd_error_bad_value);
7027 return FALSE;
7028 }
7029
7030 /* Remove unused Official Procedure Descriptor entries. Currently we
7031 only remove those associated with functions in discarded link-once
7032 sections, or weakly defined functions that have been overridden. It
7033 would be possible to remove many more entries for statically linked
7034 applications. */
7035
7036 bfd_boolean
7037 ppc64_elf_edit_opd (struct bfd_link_info *info, bfd_boolean non_overlapping)
7038 {
7039 bfd *ibfd;
7040 bfd_boolean some_edited = FALSE;
7041 asection *need_pad = NULL;
7042
7043 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7044 {
7045 asection *sec;
7046 Elf_Internal_Rela *relstart, *rel, *relend;
7047 Elf_Internal_Shdr *symtab_hdr;
7048 Elf_Internal_Sym *local_syms;
7049 bfd_vma offset;
7050 struct _opd_sec_data *opd;
7051 bfd_boolean need_edit, add_aux_fields;
7052 bfd_size_type cnt_16b = 0;
7053
7054 if (!is_ppc64_elf (ibfd))
7055 continue;
7056
7057 sec = bfd_get_section_by_name (ibfd, ".opd");
7058 if (sec == NULL || sec->size == 0)
7059 continue;
7060
7061 if (sec->sec_info_type == ELF_INFO_TYPE_JUST_SYMS)
7062 continue;
7063
7064 if (sec->output_section == bfd_abs_section_ptr)
7065 continue;
7066
7067 /* Look through the section relocs. */
7068 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
7069 continue;
7070
7071 local_syms = NULL;
7072 symtab_hdr = &elf_symtab_hdr (ibfd);
7073
7074 /* Read the relocations. */
7075 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7076 info->keep_memory);
7077 if (relstart == NULL)
7078 return FALSE;
7079
7080 /* First run through the relocs to check they are sane, and to
7081 determine whether we need to edit this opd section. */
7082 need_edit = FALSE;
7083 need_pad = sec;
7084 offset = 0;
7085 relend = relstart + sec->reloc_count;
7086 for (rel = relstart; rel < relend; )
7087 {
7088 enum elf_ppc64_reloc_type r_type;
7089 unsigned long r_symndx;
7090 asection *sym_sec;
7091 struct elf_link_hash_entry *h;
7092 Elf_Internal_Sym *sym;
7093
7094 /* .opd contains a regular array of 16 or 24 byte entries. We're
7095 only interested in the reloc pointing to a function entry
7096 point. */
7097 if (rel->r_offset != offset
7098 || rel + 1 >= relend
7099 || (rel + 1)->r_offset != offset + 8)
7100 {
7101 /* If someone messes with .opd alignment then after a
7102 "ld -r" we might have padding in the middle of .opd.
7103 Also, there's nothing to prevent someone putting
7104 something silly in .opd with the assembler. No .opd
7105 optimization for them! */
7106 broken_opd:
7107 (*_bfd_error_handler)
7108 (_("%B: .opd is not a regular array of opd entries"), ibfd);
7109 need_edit = FALSE;
7110 break;
7111 }
7112
7113 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
7114 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
7115 {
7116 (*_bfd_error_handler)
7117 (_("%B: unexpected reloc type %u in .opd section"),
7118 ibfd, r_type);
7119 need_edit = FALSE;
7120 break;
7121 }
7122
7123 r_symndx = ELF64_R_SYM (rel->r_info);
7124 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7125 r_symndx, ibfd))
7126 goto error_ret;
7127
7128 if (sym_sec == NULL || sym_sec->owner == NULL)
7129 {
7130 const char *sym_name;
7131 if (h != NULL)
7132 sym_name = h->root.root.string;
7133 else
7134 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
7135 sym_sec);
7136
7137 (*_bfd_error_handler)
7138 (_("%B: undefined sym `%s' in .opd section"),
7139 ibfd, sym_name);
7140 need_edit = FALSE;
7141 break;
7142 }
7143
7144 /* opd entries are always for functions defined in the
7145 current input bfd. If the symbol isn't defined in the
7146 input bfd, then we won't be using the function in this
7147 bfd; It must be defined in a linkonce section in another
7148 bfd, or is weak. It's also possible that we are
7149 discarding the function due to a linker script /DISCARD/,
7150 which we test for via the output_section. */
7151 if (sym_sec->owner != ibfd
7152 || sym_sec->output_section == bfd_abs_section_ptr)
7153 need_edit = TRUE;
7154
7155 rel += 2;
7156 if (rel == relend
7157 || (rel + 1 == relend && rel->r_offset == offset + 16))
7158 {
7159 if (sec->size == offset + 24)
7160 {
7161 need_pad = NULL;
7162 break;
7163 }
7164 if (rel == relend && sec->size == offset + 16)
7165 {
7166 cnt_16b++;
7167 break;
7168 }
7169 goto broken_opd;
7170 }
7171
7172 if (rel->r_offset == offset + 24)
7173 offset += 24;
7174 else if (rel->r_offset != offset + 16)
7175 goto broken_opd;
7176 else if (rel + 1 < relend
7177 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
7178 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
7179 {
7180 offset += 16;
7181 cnt_16b++;
7182 }
7183 else if (rel + 2 < relend
7184 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_ADDR64
7185 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC)
7186 {
7187 offset += 24;
7188 rel += 1;
7189 }
7190 else
7191 goto broken_opd;
7192 }
7193
7194 add_aux_fields = non_overlapping && cnt_16b > 0;
7195
7196 if (need_edit || add_aux_fields)
7197 {
7198 Elf_Internal_Rela *write_rel;
7199 Elf_Internal_Shdr *rel_hdr;
7200 bfd_byte *rptr, *wptr;
7201 bfd_byte *new_contents;
7202 bfd_boolean skip;
7203 long opd_ent_size;
7204 bfd_size_type amt;
7205
7206 new_contents = NULL;
7207 amt = sec->size * sizeof (long) / 8;
7208 opd = &ppc64_elf_section_data (sec)->u.opd;
7209 opd->adjust = bfd_zalloc (sec->owner, amt);
7210 if (opd->adjust == NULL)
7211 return FALSE;
7212 ppc64_elf_section_data (sec)->sec_type = sec_opd;
7213
7214 /* This seems a waste of time as input .opd sections are all
7215 zeros as generated by gcc, but I suppose there's no reason
7216 this will always be so. We might start putting something in
7217 the third word of .opd entries. */
7218 if ((sec->flags & SEC_IN_MEMORY) == 0)
7219 {
7220 bfd_byte *loc;
7221 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
7222 {
7223 if (loc != NULL)
7224 free (loc);
7225 error_ret:
7226 if (local_syms != NULL
7227 && symtab_hdr->contents != (unsigned char *) local_syms)
7228 free (local_syms);
7229 if (elf_section_data (sec)->relocs != relstart)
7230 free (relstart);
7231 return FALSE;
7232 }
7233 sec->contents = loc;
7234 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
7235 }
7236
7237 elf_section_data (sec)->relocs = relstart;
7238
7239 new_contents = sec->contents;
7240 if (add_aux_fields)
7241 {
7242 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
7243 if (new_contents == NULL)
7244 return FALSE;
7245 need_pad = FALSE;
7246 }
7247 wptr = new_contents;
7248 rptr = sec->contents;
7249
7250 write_rel = relstart;
7251 skip = FALSE;
7252 offset = 0;
7253 opd_ent_size = 0;
7254 for (rel = relstart; rel < relend; rel++)
7255 {
7256 unsigned long r_symndx;
7257 asection *sym_sec;
7258 struct elf_link_hash_entry *h;
7259 Elf_Internal_Sym *sym;
7260
7261 r_symndx = ELF64_R_SYM (rel->r_info);
7262 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7263 r_symndx, ibfd))
7264 goto error_ret;
7265
7266 if (rel->r_offset == offset)
7267 {
7268 struct ppc_link_hash_entry *fdh = NULL;
7269
7270 /* See if the .opd entry is full 24 byte or
7271 16 byte (with fd_aux entry overlapped with next
7272 fd_func). */
7273 opd_ent_size = 24;
7274 if ((rel + 2 == relend && sec->size == offset + 16)
7275 || (rel + 3 < relend
7276 && rel[2].r_offset == offset + 16
7277 && rel[3].r_offset == offset + 24
7278 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_ADDR64
7279 && ELF64_R_TYPE (rel[3].r_info) == R_PPC64_TOC))
7280 opd_ent_size = 16;
7281
7282 if (h != NULL
7283 && h->root.root.string[0] == '.')
7284 {
7285 struct ppc_link_hash_table *htab;
7286
7287 htab = ppc_hash_table (info);
7288 if (htab != NULL)
7289 fdh = lookup_fdh ((struct ppc_link_hash_entry *) h,
7290 htab);
7291 if (fdh != NULL
7292 && fdh->elf.root.type != bfd_link_hash_defined
7293 && fdh->elf.root.type != bfd_link_hash_defweak)
7294 fdh = NULL;
7295 }
7296
7297 skip = (sym_sec->owner != ibfd
7298 || sym_sec->output_section == bfd_abs_section_ptr);
7299 if (skip)
7300 {
7301 if (fdh != NULL && sym_sec->owner == ibfd)
7302 {
7303 /* Arrange for the function descriptor sym
7304 to be dropped. */
7305 fdh->elf.root.u.def.value = 0;
7306 fdh->elf.root.u.def.section = sym_sec;
7307 }
7308 opd->adjust[rel->r_offset / 8] = -1;
7309 }
7310 else
7311 {
7312 /* We'll be keeping this opd entry. */
7313
7314 if (fdh != NULL)
7315 {
7316 /* Redefine the function descriptor symbol to
7317 this location in the opd section. It is
7318 necessary to update the value here rather
7319 than using an array of adjustments as we do
7320 for local symbols, because various places
7321 in the generic ELF code use the value
7322 stored in u.def.value. */
7323 fdh->elf.root.u.def.value = wptr - new_contents;
7324 fdh->adjust_done = 1;
7325 }
7326
7327 /* Local syms are a bit tricky. We could
7328 tweak them as they can be cached, but
7329 we'd need to look through the local syms
7330 for the function descriptor sym which we
7331 don't have at the moment. So keep an
7332 array of adjustments. */
7333 opd->adjust[rel->r_offset / 8]
7334 = (wptr - new_contents) - (rptr - sec->contents);
7335
7336 if (wptr != rptr)
7337 memcpy (wptr, rptr, opd_ent_size);
7338 wptr += opd_ent_size;
7339 if (add_aux_fields && opd_ent_size == 16)
7340 {
7341 memset (wptr, '\0', 8);
7342 wptr += 8;
7343 }
7344 }
7345 rptr += opd_ent_size;
7346 offset += opd_ent_size;
7347 }
7348
7349 if (skip)
7350 {
7351 if (!NO_OPD_RELOCS
7352 && !info->relocatable
7353 && !dec_dynrel_count (rel->r_info, sec, info,
7354 NULL, h, sym_sec))
7355 goto error_ret;
7356 }
7357 else
7358 {
7359 /* We need to adjust any reloc offsets to point to the
7360 new opd entries. While we're at it, we may as well
7361 remove redundant relocs. */
7362 rel->r_offset += opd->adjust[(offset - opd_ent_size) / 8];
7363 if (write_rel != rel)
7364 memcpy (write_rel, rel, sizeof (*rel));
7365 ++write_rel;
7366 }
7367 }
7368
7369 sec->size = wptr - new_contents;
7370 sec->reloc_count = write_rel - relstart;
7371 if (add_aux_fields)
7372 {
7373 free (sec->contents);
7374 sec->contents = new_contents;
7375 }
7376
7377 /* Fudge the header size too, as this is used later in
7378 elf_bfd_final_link if we are emitting relocs. */
7379 rel_hdr = _bfd_elf_single_rel_hdr (sec);
7380 rel_hdr->sh_size = sec->reloc_count * rel_hdr->sh_entsize;
7381 some_edited = TRUE;
7382 }
7383 else if (elf_section_data (sec)->relocs != relstart)
7384 free (relstart);
7385
7386 if (local_syms != NULL
7387 && symtab_hdr->contents != (unsigned char *) local_syms)
7388 {
7389 if (!info->keep_memory)
7390 free (local_syms);
7391 else
7392 symtab_hdr->contents = (unsigned char *) local_syms;
7393 }
7394 }
7395
7396 if (some_edited)
7397 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
7398
7399 /* If we are doing a final link and the last .opd entry is just 16 byte
7400 long, add a 8 byte padding after it. */
7401 if (need_pad != NULL && !info->relocatable)
7402 {
7403 bfd_byte *p;
7404
7405 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
7406 {
7407 BFD_ASSERT (need_pad->size > 0);
7408
7409 p = bfd_malloc (need_pad->size + 8);
7410 if (p == NULL)
7411 return FALSE;
7412
7413 if (! bfd_get_section_contents (need_pad->owner, need_pad,
7414 p, 0, need_pad->size))
7415 return FALSE;
7416
7417 need_pad->contents = p;
7418 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
7419 }
7420 else
7421 {
7422 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
7423 if (p == NULL)
7424 return FALSE;
7425
7426 need_pad->contents = p;
7427 }
7428
7429 memset (need_pad->contents + need_pad->size, 0, 8);
7430 need_pad->size += 8;
7431 }
7432
7433 return TRUE;
7434 }
7435
7436 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
7437
7438 asection *
7439 ppc64_elf_tls_setup (struct bfd_link_info *info,
7440 int no_tls_get_addr_opt,
7441 int *no_multi_toc)
7442 {
7443 struct ppc_link_hash_table *htab;
7444
7445 htab = ppc_hash_table (info);
7446 if (htab == NULL)
7447 return NULL;
7448
7449 if (*no_multi_toc)
7450 htab->do_multi_toc = 0;
7451 else if (!htab->do_multi_toc)
7452 *no_multi_toc = 1;
7453
7454 htab->tls_get_addr = ((struct ppc_link_hash_entry *)
7455 elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
7456 FALSE, FALSE, TRUE));
7457 /* Move dynamic linking info to the function descriptor sym. */
7458 if (htab->tls_get_addr != NULL)
7459 func_desc_adjust (&htab->tls_get_addr->elf, info);
7460 htab->tls_get_addr_fd = ((struct ppc_link_hash_entry *)
7461 elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
7462 FALSE, FALSE, TRUE));
7463 if (!no_tls_get_addr_opt)
7464 {
7465 struct elf_link_hash_entry *opt, *opt_fd, *tga, *tga_fd;
7466
7467 opt = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr_opt",
7468 FALSE, FALSE, TRUE);
7469 if (opt != NULL)
7470 func_desc_adjust (opt, info);
7471 opt_fd = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
7472 FALSE, FALSE, TRUE);
7473 if (opt_fd != NULL
7474 && (opt_fd->root.type == bfd_link_hash_defined
7475 || opt_fd->root.type == bfd_link_hash_defweak))
7476 {
7477 /* If glibc supports an optimized __tls_get_addr call stub,
7478 signalled by the presence of __tls_get_addr_opt, and we'll
7479 be calling __tls_get_addr via a plt call stub, then
7480 make __tls_get_addr point to __tls_get_addr_opt. */
7481 tga_fd = &htab->tls_get_addr_fd->elf;
7482 if (htab->elf.dynamic_sections_created
7483 && tga_fd != NULL
7484 && (tga_fd->type == STT_FUNC
7485 || tga_fd->needs_plt)
7486 && !(SYMBOL_CALLS_LOCAL (info, tga_fd)
7487 || (ELF_ST_VISIBILITY (tga_fd->other) != STV_DEFAULT
7488 && tga_fd->root.type == bfd_link_hash_undefweak)))
7489 {
7490 struct plt_entry *ent;
7491
7492 for (ent = tga_fd->plt.plist; ent != NULL; ent = ent->next)
7493 if (ent->plt.refcount > 0)
7494 break;
7495 if (ent != NULL)
7496 {
7497 tga_fd->root.type = bfd_link_hash_indirect;
7498 tga_fd->root.u.i.link = &opt_fd->root;
7499 ppc64_elf_copy_indirect_symbol (info, opt_fd, tga_fd);
7500 if (opt_fd->dynindx != -1)
7501 {
7502 /* Use __tls_get_addr_opt in dynamic relocations. */
7503 opt_fd->dynindx = -1;
7504 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
7505 opt_fd->dynstr_index);
7506 if (!bfd_elf_link_record_dynamic_symbol (info, opt_fd))
7507 return NULL;
7508 }
7509 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) opt_fd;
7510 tga = &htab->tls_get_addr->elf;
7511 if (opt != NULL && tga != NULL)
7512 {
7513 tga->root.type = bfd_link_hash_indirect;
7514 tga->root.u.i.link = &opt->root;
7515 ppc64_elf_copy_indirect_symbol (info, opt, tga);
7516 _bfd_elf_link_hash_hide_symbol (info, opt,
7517 tga->forced_local);
7518 htab->tls_get_addr = (struct ppc_link_hash_entry *) opt;
7519 }
7520 htab->tls_get_addr_fd->oh = htab->tls_get_addr;
7521 htab->tls_get_addr_fd->is_func_descriptor = 1;
7522 if (htab->tls_get_addr != NULL)
7523 {
7524 htab->tls_get_addr->oh = htab->tls_get_addr_fd;
7525 htab->tls_get_addr->is_func = 1;
7526 }
7527 }
7528 }
7529 }
7530 else
7531 no_tls_get_addr_opt = TRUE;
7532 }
7533 htab->no_tls_get_addr_opt = no_tls_get_addr_opt;
7534 return _bfd_elf_tls_setup (info->output_bfd, info);
7535 }
7536
7537 /* Return TRUE iff REL is a branch reloc with a global symbol matching
7538 HASH1 or HASH2. */
7539
7540 static bfd_boolean
7541 branch_reloc_hash_match (const bfd *ibfd,
7542 const Elf_Internal_Rela *rel,
7543 const struct ppc_link_hash_entry *hash1,
7544 const struct ppc_link_hash_entry *hash2)
7545 {
7546 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
7547 enum elf_ppc64_reloc_type r_type = ELF64_R_TYPE (rel->r_info);
7548 unsigned int r_symndx = ELF64_R_SYM (rel->r_info);
7549
7550 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
7551 {
7552 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
7553 struct elf_link_hash_entry *h;
7554
7555 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
7556 h = elf_follow_link (h);
7557 if (h == &hash1->elf || h == &hash2->elf)
7558 return TRUE;
7559 }
7560 return FALSE;
7561 }
7562
7563 /* Run through all the TLS relocs looking for optimization
7564 opportunities. The linker has been hacked (see ppc64elf.em) to do
7565 a preliminary section layout so that we know the TLS segment
7566 offsets. We can't optimize earlier because some optimizations need
7567 to know the tp offset, and we need to optimize before allocating
7568 dynamic relocations. */
7569
7570 bfd_boolean
7571 ppc64_elf_tls_optimize (struct bfd_link_info *info)
7572 {
7573 bfd *ibfd;
7574 asection *sec;
7575 struct ppc_link_hash_table *htab;
7576 unsigned char *toc_ref;
7577 int pass;
7578
7579 if (info->relocatable || !info->executable)
7580 return TRUE;
7581
7582 htab = ppc_hash_table (info);
7583 if (htab == NULL)
7584 return FALSE;
7585
7586 /* Make two passes over the relocs. On the first pass, mark toc
7587 entries involved with tls relocs, and check that tls relocs
7588 involved in setting up a tls_get_addr call are indeed followed by
7589 such a call. If they are not, we can't do any tls optimization.
7590 On the second pass twiddle tls_mask flags to notify
7591 relocate_section that optimization can be done, and adjust got
7592 and plt refcounts. */
7593 toc_ref = NULL;
7594 for (pass = 0; pass < 2; ++pass)
7595 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7596 {
7597 Elf_Internal_Sym *locsyms = NULL;
7598 asection *toc = bfd_get_section_by_name (ibfd, ".toc");
7599
7600 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7601 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
7602 {
7603 Elf_Internal_Rela *relstart, *rel, *relend;
7604 bfd_boolean found_tls_get_addr_arg = 0;
7605
7606 /* Read the relocations. */
7607 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7608 info->keep_memory);
7609 if (relstart == NULL)
7610 return FALSE;
7611
7612 relend = relstart + sec->reloc_count;
7613 for (rel = relstart; rel < relend; rel++)
7614 {
7615 enum elf_ppc64_reloc_type r_type;
7616 unsigned long r_symndx;
7617 struct elf_link_hash_entry *h;
7618 Elf_Internal_Sym *sym;
7619 asection *sym_sec;
7620 unsigned char *tls_mask;
7621 unsigned char tls_set, tls_clear, tls_type = 0;
7622 bfd_vma value;
7623 bfd_boolean ok_tprel, is_local;
7624 long toc_ref_index = 0;
7625 int expecting_tls_get_addr = 0;
7626 bfd_boolean ret = FALSE;
7627
7628 r_symndx = ELF64_R_SYM (rel->r_info);
7629 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
7630 r_symndx, ibfd))
7631 {
7632 err_free_rel:
7633 if (elf_section_data (sec)->relocs != relstart)
7634 free (relstart);
7635 if (toc_ref != NULL)
7636 free (toc_ref);
7637 if (locsyms != NULL
7638 && (elf_symtab_hdr (ibfd).contents
7639 != (unsigned char *) locsyms))
7640 free (locsyms);
7641 return ret;
7642 }
7643
7644 if (h != NULL)
7645 {
7646 if (h->root.type == bfd_link_hash_defined
7647 || h->root.type == bfd_link_hash_defweak)
7648 value = h->root.u.def.value;
7649 else if (h->root.type == bfd_link_hash_undefweak)
7650 value = 0;
7651 else
7652 {
7653 found_tls_get_addr_arg = 0;
7654 continue;
7655 }
7656 }
7657 else
7658 /* Symbols referenced by TLS relocs must be of type
7659 STT_TLS. So no need for .opd local sym adjust. */
7660 value = sym->st_value;
7661
7662 ok_tprel = FALSE;
7663 is_local = FALSE;
7664 if (h == NULL
7665 || !h->def_dynamic)
7666 {
7667 is_local = TRUE;
7668 if (h != NULL
7669 && h->root.type == bfd_link_hash_undefweak)
7670 ok_tprel = TRUE;
7671 else
7672 {
7673 value += sym_sec->output_offset;
7674 value += sym_sec->output_section->vma;
7675 value -= htab->elf.tls_sec->vma;
7676 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
7677 < (bfd_vma) 1 << 32);
7678 }
7679 }
7680
7681 r_type = ELF64_R_TYPE (rel->r_info);
7682 /* If this section has old-style __tls_get_addr calls
7683 without marker relocs, then check that each
7684 __tls_get_addr call reloc is preceded by a reloc
7685 that conceivably belongs to the __tls_get_addr arg
7686 setup insn. If we don't find matching arg setup
7687 relocs, don't do any tls optimization. */
7688 if (pass == 0
7689 && sec->has_tls_get_addr_call
7690 && h != NULL
7691 && (h == &htab->tls_get_addr->elf
7692 || h == &htab->tls_get_addr_fd->elf)
7693 && !found_tls_get_addr_arg
7694 && is_branch_reloc (r_type))
7695 {
7696 info->callbacks->minfo (_("%H __tls_get_addr lost arg, "
7697 "TLS optimization disabled\n"),
7698 ibfd, sec, rel->r_offset);
7699 ret = TRUE;
7700 goto err_free_rel;
7701 }
7702
7703 found_tls_get_addr_arg = 0;
7704 switch (r_type)
7705 {
7706 case R_PPC64_GOT_TLSLD16:
7707 case R_PPC64_GOT_TLSLD16_LO:
7708 expecting_tls_get_addr = 1;
7709 found_tls_get_addr_arg = 1;
7710 /* Fall thru */
7711
7712 case R_PPC64_GOT_TLSLD16_HI:
7713 case R_PPC64_GOT_TLSLD16_HA:
7714 /* These relocs should never be against a symbol
7715 defined in a shared lib. Leave them alone if
7716 that turns out to be the case. */
7717 if (!is_local)
7718 continue;
7719
7720 /* LD -> LE */
7721 tls_set = 0;
7722 tls_clear = TLS_LD;
7723 tls_type = TLS_TLS | TLS_LD;
7724 break;
7725
7726 case R_PPC64_GOT_TLSGD16:
7727 case R_PPC64_GOT_TLSGD16_LO:
7728 expecting_tls_get_addr = 1;
7729 found_tls_get_addr_arg = 1;
7730 /* Fall thru */
7731
7732 case R_PPC64_GOT_TLSGD16_HI:
7733 case R_PPC64_GOT_TLSGD16_HA:
7734 if (ok_tprel)
7735 /* GD -> LE */
7736 tls_set = 0;
7737 else
7738 /* GD -> IE */
7739 tls_set = TLS_TLS | TLS_TPRELGD;
7740 tls_clear = TLS_GD;
7741 tls_type = TLS_TLS | TLS_GD;
7742 break;
7743
7744 case R_PPC64_GOT_TPREL16_DS:
7745 case R_PPC64_GOT_TPREL16_LO_DS:
7746 case R_PPC64_GOT_TPREL16_HI:
7747 case R_PPC64_GOT_TPREL16_HA:
7748 if (ok_tprel)
7749 {
7750 /* IE -> LE */
7751 tls_set = 0;
7752 tls_clear = TLS_TPREL;
7753 tls_type = TLS_TLS | TLS_TPREL;
7754 break;
7755 }
7756 continue;
7757
7758 case R_PPC64_TLSGD:
7759 case R_PPC64_TLSLD:
7760 found_tls_get_addr_arg = 1;
7761 /* Fall thru */
7762
7763 case R_PPC64_TLS:
7764 case R_PPC64_TOC16:
7765 case R_PPC64_TOC16_LO:
7766 if (sym_sec == NULL || sym_sec != toc)
7767 continue;
7768
7769 /* Mark this toc entry as referenced by a TLS
7770 code sequence. We can do that now in the
7771 case of R_PPC64_TLS, and after checking for
7772 tls_get_addr for the TOC16 relocs. */
7773 if (toc_ref == NULL)
7774 toc_ref = bfd_zmalloc (toc->output_section->rawsize / 8);
7775 if (toc_ref == NULL)
7776 goto err_free_rel;
7777
7778 if (h != NULL)
7779 value = h->root.u.def.value;
7780 else
7781 value = sym->st_value;
7782 value += rel->r_addend;
7783 BFD_ASSERT (value < toc->size && value % 8 == 0);
7784 toc_ref_index = (value + toc->output_offset) / 8;
7785 if (r_type == R_PPC64_TLS
7786 || r_type == R_PPC64_TLSGD
7787 || r_type == R_PPC64_TLSLD)
7788 {
7789 toc_ref[toc_ref_index] = 1;
7790 continue;
7791 }
7792
7793 if (pass != 0 && toc_ref[toc_ref_index] == 0)
7794 continue;
7795
7796 tls_set = 0;
7797 tls_clear = 0;
7798 expecting_tls_get_addr = 2;
7799 break;
7800
7801 case R_PPC64_TPREL64:
7802 if (pass == 0
7803 || sec != toc
7804 || toc_ref == NULL
7805 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
7806 continue;
7807 if (ok_tprel)
7808 {
7809 /* IE -> LE */
7810 tls_set = TLS_EXPLICIT;
7811 tls_clear = TLS_TPREL;
7812 break;
7813 }
7814 continue;
7815
7816 case R_PPC64_DTPMOD64:
7817 if (pass == 0
7818 || sec != toc
7819 || toc_ref == NULL
7820 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
7821 continue;
7822 if (rel + 1 < relend
7823 && (rel[1].r_info
7824 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
7825 && rel[1].r_offset == rel->r_offset + 8)
7826 {
7827 if (ok_tprel)
7828 /* GD -> LE */
7829 tls_set = TLS_EXPLICIT | TLS_GD;
7830 else
7831 /* GD -> IE */
7832 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
7833 tls_clear = TLS_GD;
7834 }
7835 else
7836 {
7837 if (!is_local)
7838 continue;
7839
7840 /* LD -> LE */
7841 tls_set = TLS_EXPLICIT;
7842 tls_clear = TLS_LD;
7843 }
7844 break;
7845
7846 default:
7847 continue;
7848 }
7849
7850 if (pass == 0)
7851 {
7852 if (!expecting_tls_get_addr
7853 || !sec->has_tls_get_addr_call)
7854 continue;
7855
7856 if (rel + 1 < relend
7857 && branch_reloc_hash_match (ibfd, rel + 1,
7858 htab->tls_get_addr,
7859 htab->tls_get_addr_fd))
7860 {
7861 if (expecting_tls_get_addr == 2)
7862 {
7863 /* Check for toc tls entries. */
7864 unsigned char *toc_tls;
7865 int retval;
7866
7867 retval = get_tls_mask (&toc_tls, NULL, NULL,
7868 &locsyms,
7869 rel, ibfd);
7870 if (retval == 0)
7871 goto err_free_rel;
7872 if (toc_tls != NULL)
7873 {
7874 if ((*toc_tls & (TLS_GD | TLS_LD)) != 0)
7875 found_tls_get_addr_arg = 1;
7876 if (retval > 1)
7877 toc_ref[toc_ref_index] = 1;
7878 }
7879 }
7880 continue;
7881 }
7882
7883 if (expecting_tls_get_addr != 1)
7884 continue;
7885
7886 /* Uh oh, we didn't find the expected call. We
7887 could just mark this symbol to exclude it
7888 from tls optimization but it's safer to skip
7889 the entire optimization. */
7890 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
7891 "TLS optimization disabled\n"),
7892 ibfd, sec, rel->r_offset);
7893 ret = TRUE;
7894 goto err_free_rel;
7895 }
7896
7897 if (expecting_tls_get_addr && htab->tls_get_addr != NULL)
7898 {
7899 struct plt_entry *ent;
7900 for (ent = htab->tls_get_addr->elf.plt.plist;
7901 ent != NULL;
7902 ent = ent->next)
7903 if (ent->addend == 0)
7904 {
7905 if (ent->plt.refcount > 0)
7906 {
7907 ent->plt.refcount -= 1;
7908 expecting_tls_get_addr = 0;
7909 }
7910 break;
7911 }
7912 }
7913
7914 if (expecting_tls_get_addr && htab->tls_get_addr_fd != NULL)
7915 {
7916 struct plt_entry *ent;
7917 for (ent = htab->tls_get_addr_fd->elf.plt.plist;
7918 ent != NULL;
7919 ent = ent->next)
7920 if (ent->addend == 0)
7921 {
7922 if (ent->plt.refcount > 0)
7923 ent->plt.refcount -= 1;
7924 break;
7925 }
7926 }
7927
7928 if (tls_clear == 0)
7929 continue;
7930
7931 if ((tls_set & TLS_EXPLICIT) == 0)
7932 {
7933 struct got_entry *ent;
7934
7935 /* Adjust got entry for this reloc. */
7936 if (h != NULL)
7937 ent = h->got.glist;
7938 else
7939 ent = elf_local_got_ents (ibfd)[r_symndx];
7940
7941 for (; ent != NULL; ent = ent->next)
7942 if (ent->addend == rel->r_addend
7943 && ent->owner == ibfd
7944 && ent->tls_type == tls_type)
7945 break;
7946 if (ent == NULL)
7947 abort ();
7948
7949 if (tls_set == 0)
7950 {
7951 /* We managed to get rid of a got entry. */
7952 if (ent->got.refcount > 0)
7953 ent->got.refcount -= 1;
7954 }
7955 }
7956 else
7957 {
7958 /* If we got rid of a DTPMOD/DTPREL reloc pair then
7959 we'll lose one or two dyn relocs. */
7960 if (!dec_dynrel_count (rel->r_info, sec, info,
7961 NULL, h, sym_sec))
7962 return FALSE;
7963
7964 if (tls_set == (TLS_EXPLICIT | TLS_GD))
7965 {
7966 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
7967 NULL, h, sym_sec))
7968 return FALSE;
7969 }
7970 }
7971
7972 *tls_mask |= tls_set;
7973 *tls_mask &= ~tls_clear;
7974 }
7975
7976 if (elf_section_data (sec)->relocs != relstart)
7977 free (relstart);
7978 }
7979
7980 if (locsyms != NULL
7981 && (elf_symtab_hdr (ibfd).contents != (unsigned char *) locsyms))
7982 {
7983 if (!info->keep_memory)
7984 free (locsyms);
7985 else
7986 elf_symtab_hdr (ibfd).contents = (unsigned char *) locsyms;
7987 }
7988 }
7989
7990 if (toc_ref != NULL)
7991 free (toc_ref);
7992 return TRUE;
7993 }
7994
7995 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
7996 the values of any global symbols in a toc section that has been
7997 edited. Globals in toc sections should be a rarity, so this function
7998 sets a flag if any are found in toc sections other than the one just
7999 edited, so that futher hash table traversals can be avoided. */
8000
8001 struct adjust_toc_info
8002 {
8003 asection *toc;
8004 unsigned long *skip;
8005 bfd_boolean global_toc_syms;
8006 };
8007
8008 enum toc_skip_enum { ref_from_discarded = 1, can_optimize = 2 };
8009
8010 static bfd_boolean
8011 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
8012 {
8013 struct ppc_link_hash_entry *eh;
8014 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
8015 unsigned long i;
8016
8017 if (h->root.type != bfd_link_hash_defined
8018 && h->root.type != bfd_link_hash_defweak)
8019 return TRUE;
8020
8021 eh = (struct ppc_link_hash_entry *) h;
8022 if (eh->adjust_done)
8023 return TRUE;
8024
8025 if (eh->elf.root.u.def.section == toc_inf->toc)
8026 {
8027 if (eh->elf.root.u.def.value > toc_inf->toc->rawsize)
8028 i = toc_inf->toc->rawsize >> 3;
8029 else
8030 i = eh->elf.root.u.def.value >> 3;
8031
8032 if ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0)
8033 {
8034 (*_bfd_error_handler)
8035 (_("%s defined on removed toc entry"), eh->elf.root.root.string);
8036 do
8037 ++i;
8038 while ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0);
8039 eh->elf.root.u.def.value = (bfd_vma) i << 3;
8040 }
8041
8042 eh->elf.root.u.def.value -= toc_inf->skip[i];
8043 eh->adjust_done = 1;
8044 }
8045 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
8046 toc_inf->global_toc_syms = TRUE;
8047
8048 return TRUE;
8049 }
8050
8051 /* Return TRUE iff INSN is one we expect on a _LO variety toc/got reloc. */
8052
8053 static bfd_boolean
8054 ok_lo_toc_insn (unsigned int insn)
8055 {
8056 return ((insn & (0x3f << 26)) == 14u << 26 /* addi */
8057 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
8058 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
8059 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
8060 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
8061 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
8062 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
8063 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
8064 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
8065 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
8066 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
8067 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
8068 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
8069 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
8070 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
8071 && (insn & 3) != 1)
8072 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
8073 && ((insn & 3) == 0 || (insn & 3) == 3))
8074 || (insn & (0x3f << 26)) == 12u << 26 /* addic */);
8075 }
8076
8077 /* Examine all relocs referencing .toc sections in order to remove
8078 unused .toc entries. */
8079
8080 bfd_boolean
8081 ppc64_elf_edit_toc (struct bfd_link_info *info)
8082 {
8083 bfd *ibfd;
8084 struct adjust_toc_info toc_inf;
8085 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8086
8087 htab->do_toc_opt = 1;
8088 toc_inf.global_toc_syms = TRUE;
8089 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8090 {
8091 asection *toc, *sec;
8092 Elf_Internal_Shdr *symtab_hdr;
8093 Elf_Internal_Sym *local_syms;
8094 Elf_Internal_Rela *relstart, *rel, *toc_relocs;
8095 unsigned long *skip, *drop;
8096 unsigned char *used;
8097 unsigned char *keep, last, some_unused;
8098
8099 if (!is_ppc64_elf (ibfd))
8100 continue;
8101
8102 toc = bfd_get_section_by_name (ibfd, ".toc");
8103 if (toc == NULL
8104 || toc->size == 0
8105 || toc->sec_info_type == ELF_INFO_TYPE_JUST_SYMS
8106 || elf_discarded_section (toc))
8107 continue;
8108
8109 toc_relocs = NULL;
8110 local_syms = NULL;
8111 symtab_hdr = &elf_symtab_hdr (ibfd);
8112
8113 /* Look at sections dropped from the final link. */
8114 skip = NULL;
8115 relstart = NULL;
8116 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8117 {
8118 if (sec->reloc_count == 0
8119 || !elf_discarded_section (sec)
8120 || get_opd_info (sec)
8121 || (sec->flags & SEC_ALLOC) == 0
8122 || (sec->flags & SEC_DEBUGGING) != 0)
8123 continue;
8124
8125 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
8126 if (relstart == NULL)
8127 goto error_ret;
8128
8129 /* Run through the relocs to see which toc entries might be
8130 unused. */
8131 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8132 {
8133 enum elf_ppc64_reloc_type r_type;
8134 unsigned long r_symndx;
8135 asection *sym_sec;
8136 struct elf_link_hash_entry *h;
8137 Elf_Internal_Sym *sym;
8138 bfd_vma val;
8139
8140 r_type = ELF64_R_TYPE (rel->r_info);
8141 switch (r_type)
8142 {
8143 default:
8144 continue;
8145
8146 case R_PPC64_TOC16:
8147 case R_PPC64_TOC16_LO:
8148 case R_PPC64_TOC16_HI:
8149 case R_PPC64_TOC16_HA:
8150 case R_PPC64_TOC16_DS:
8151 case R_PPC64_TOC16_LO_DS:
8152 break;
8153 }
8154
8155 r_symndx = ELF64_R_SYM (rel->r_info);
8156 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8157 r_symndx, ibfd))
8158 goto error_ret;
8159
8160 if (sym_sec != toc)
8161 continue;
8162
8163 if (h != NULL)
8164 val = h->root.u.def.value;
8165 else
8166 val = sym->st_value;
8167 val += rel->r_addend;
8168
8169 if (val >= toc->size)
8170 continue;
8171
8172 /* Anything in the toc ought to be aligned to 8 bytes.
8173 If not, don't mark as unused. */
8174 if (val & 7)
8175 continue;
8176
8177 if (skip == NULL)
8178 {
8179 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
8180 if (skip == NULL)
8181 goto error_ret;
8182 }
8183
8184 skip[val >> 3] = ref_from_discarded;
8185 }
8186
8187 if (elf_section_data (sec)->relocs != relstart)
8188 free (relstart);
8189 }
8190
8191 /* For largetoc loads of address constants, we can convert
8192 . addis rx,2,addr@got@ha
8193 . ld ry,addr@got@l(rx)
8194 to
8195 . addis rx,2,addr@toc@ha
8196 . addi ry,rx,addr@toc@l
8197 when addr is within 2G of the toc pointer. This then means
8198 that the word storing "addr" in the toc is no longer needed. */
8199
8200 if (!ppc64_elf_tdata (ibfd)->has_small_toc_reloc
8201 && toc->output_section->rawsize < (bfd_vma) 1 << 31
8202 && toc->reloc_count != 0)
8203 {
8204 /* Read toc relocs. */
8205 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
8206 info->keep_memory);
8207 if (toc_relocs == NULL)
8208 goto error_ret;
8209
8210 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
8211 {
8212 enum elf_ppc64_reloc_type r_type;
8213 unsigned long r_symndx;
8214 asection *sym_sec;
8215 struct elf_link_hash_entry *h;
8216 Elf_Internal_Sym *sym;
8217 bfd_vma val, addr;
8218
8219 r_type = ELF64_R_TYPE (rel->r_info);
8220 if (r_type != R_PPC64_ADDR64)
8221 continue;
8222
8223 r_symndx = ELF64_R_SYM (rel->r_info);
8224 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8225 r_symndx, ibfd))
8226 goto error_ret;
8227
8228 if (sym_sec == NULL
8229 || elf_discarded_section (sym_sec))
8230 continue;
8231
8232 if (!SYMBOL_CALLS_LOCAL (info, h))
8233 continue;
8234
8235 if (h != NULL)
8236 {
8237 if (h->type == STT_GNU_IFUNC)
8238 continue;
8239 val = h->root.u.def.value;
8240 }
8241 else
8242 {
8243 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
8244 continue;
8245 val = sym->st_value;
8246 }
8247 val += rel->r_addend;
8248 val += sym_sec->output_section->vma + sym_sec->output_offset;
8249
8250 /* We don't yet know the exact toc pointer value, but we
8251 know it will be somewhere in the toc section. Don't
8252 optimize if the difference from any possible toc
8253 pointer is outside [ff..f80008000, 7fff7fff]. */
8254 addr = toc->output_section->vma + TOC_BASE_OFF;
8255 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
8256 continue;
8257
8258 addr = toc->output_section->vma + toc->output_section->rawsize;
8259 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
8260 continue;
8261
8262 if (skip == NULL)
8263 {
8264 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
8265 if (skip == NULL)
8266 goto error_ret;
8267 }
8268
8269 skip[rel->r_offset >> 3]
8270 |= can_optimize | ((rel - toc_relocs) << 2);
8271 }
8272 }
8273
8274 if (skip == NULL)
8275 continue;
8276
8277 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
8278 if (used == NULL)
8279 {
8280 error_ret:
8281 if (local_syms != NULL
8282 && symtab_hdr->contents != (unsigned char *) local_syms)
8283 free (local_syms);
8284 if (sec != NULL
8285 && relstart != NULL
8286 && elf_section_data (sec)->relocs != relstart)
8287 free (relstart);
8288 if (toc_relocs != NULL
8289 && elf_section_data (toc)->relocs != toc_relocs)
8290 free (toc_relocs);
8291 if (skip != NULL)
8292 free (skip);
8293 return FALSE;
8294 }
8295
8296 /* Now check all kept sections that might reference the toc.
8297 Check the toc itself last. */
8298 for (sec = (ibfd->sections == toc && toc->next ? toc->next
8299 : ibfd->sections);
8300 sec != NULL;
8301 sec = (sec == toc ? NULL
8302 : sec->next == NULL ? toc
8303 : sec->next == toc && toc->next ? toc->next
8304 : sec->next))
8305 {
8306 int repeat;
8307
8308 if (sec->reloc_count == 0
8309 || elf_discarded_section (sec)
8310 || get_opd_info (sec)
8311 || (sec->flags & SEC_ALLOC) == 0
8312 || (sec->flags & SEC_DEBUGGING) != 0)
8313 continue;
8314
8315 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8316 info->keep_memory);
8317 if (relstart == NULL)
8318 goto error_ret;
8319
8320 /* Mark toc entries referenced as used. */
8321 repeat = 0;
8322 do
8323 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8324 {
8325 enum elf_ppc64_reloc_type r_type;
8326 unsigned long r_symndx;
8327 asection *sym_sec;
8328 struct elf_link_hash_entry *h;
8329 Elf_Internal_Sym *sym;
8330 bfd_vma val;
8331 enum {no_check, check_lo, check_ha} insn_check;
8332
8333 r_type = ELF64_R_TYPE (rel->r_info);
8334 switch (r_type)
8335 {
8336 default:
8337 insn_check = no_check;
8338 break;
8339
8340 case R_PPC64_GOT_TLSLD16_HA:
8341 case R_PPC64_GOT_TLSGD16_HA:
8342 case R_PPC64_GOT_TPREL16_HA:
8343 case R_PPC64_GOT_DTPREL16_HA:
8344 case R_PPC64_GOT16_HA:
8345 case R_PPC64_TOC16_HA:
8346 insn_check = check_ha;
8347 break;
8348
8349 case R_PPC64_GOT_TLSLD16_LO:
8350 case R_PPC64_GOT_TLSGD16_LO:
8351 case R_PPC64_GOT_TPREL16_LO_DS:
8352 case R_PPC64_GOT_DTPREL16_LO_DS:
8353 case R_PPC64_GOT16_LO:
8354 case R_PPC64_GOT16_LO_DS:
8355 case R_PPC64_TOC16_LO:
8356 case R_PPC64_TOC16_LO_DS:
8357 insn_check = check_lo;
8358 break;
8359 }
8360
8361 if (insn_check != no_check)
8362 {
8363 bfd_vma off = rel->r_offset & ~3;
8364 unsigned char buf[4];
8365 unsigned int insn;
8366
8367 if (!bfd_get_section_contents (ibfd, sec, buf, off, 4))
8368 {
8369 free (used);
8370 goto error_ret;
8371 }
8372 insn = bfd_get_32 (ibfd, buf);
8373 if (insn_check == check_lo
8374 ? !ok_lo_toc_insn (insn)
8375 : ((insn & ((0x3f << 26) | 0x1f << 16))
8376 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */))
8377 {
8378 char str[12];
8379
8380 ppc64_elf_tdata (ibfd)->unexpected_toc_insn = 1;
8381 sprintf (str, "%#08x", insn);
8382 info->callbacks->einfo
8383 (_("%P: %H: toc optimization is not supported for"
8384 " %s instruction.\n"),
8385 ibfd, sec, rel->r_offset & ~3, str);
8386 }
8387 }
8388
8389 switch (r_type)
8390 {
8391 case R_PPC64_TOC16:
8392 case R_PPC64_TOC16_LO:
8393 case R_PPC64_TOC16_HI:
8394 case R_PPC64_TOC16_HA:
8395 case R_PPC64_TOC16_DS:
8396 case R_PPC64_TOC16_LO_DS:
8397 /* In case we're taking addresses of toc entries. */
8398 case R_PPC64_ADDR64:
8399 break;
8400
8401 default:
8402 continue;
8403 }
8404
8405 r_symndx = ELF64_R_SYM (rel->r_info);
8406 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8407 r_symndx, ibfd))
8408 {
8409 free (used);
8410 goto error_ret;
8411 }
8412
8413 if (sym_sec != toc)
8414 continue;
8415
8416 if (h != NULL)
8417 val = h->root.u.def.value;
8418 else
8419 val = sym->st_value;
8420 val += rel->r_addend;
8421
8422 if (val >= toc->size)
8423 continue;
8424
8425 if ((skip[val >> 3] & can_optimize) != 0)
8426 {
8427 bfd_vma off;
8428 unsigned char opc;
8429
8430 switch (r_type)
8431 {
8432 case R_PPC64_TOC16_HA:
8433 break;
8434
8435 case R_PPC64_TOC16_LO_DS:
8436 off = rel->r_offset + (bfd_big_endian (ibfd) ? -2 : 3);
8437 if (!bfd_get_section_contents (ibfd, sec, &opc, off, 1))
8438 {
8439 free (used);
8440 goto error_ret;
8441 }
8442 if ((opc & (0x3f << 2)) == (58u << 2))
8443 break;
8444 /* Fall thru */
8445
8446 default:
8447 /* Wrong sort of reloc, or not a ld. We may
8448 as well clear ref_from_discarded too. */
8449 skip[val >> 3] = 0;
8450 }
8451 }
8452
8453 /* For the toc section, we only mark as used if
8454 this entry itself isn't unused. */
8455 if (sec == toc
8456 && !used[val >> 3]
8457 && (used[rel->r_offset >> 3]
8458 || !(skip[rel->r_offset >> 3] & ref_from_discarded)))
8459 /* Do all the relocs again, to catch reference
8460 chains. */
8461 repeat = 1;
8462
8463 used[val >> 3] = 1;
8464 }
8465 while (repeat);
8466
8467 if (elf_section_data (sec)->relocs != relstart)
8468 free (relstart);
8469 }
8470
8471 /* Merge the used and skip arrays. Assume that TOC
8472 doublewords not appearing as either used or unused belong
8473 to to an entry more than one doubleword in size. */
8474 for (drop = skip, keep = used, last = 0, some_unused = 0;
8475 drop < skip + (toc->size + 7) / 8;
8476 ++drop, ++keep)
8477 {
8478 if (*keep)
8479 {
8480 *drop &= ~ref_from_discarded;
8481 if ((*drop & can_optimize) != 0)
8482 some_unused = 1;
8483 last = 0;
8484 }
8485 else if ((*drop & ref_from_discarded) != 0)
8486 {
8487 some_unused = 1;
8488 last = ref_from_discarded;
8489 }
8490 else
8491 *drop = last;
8492 }
8493
8494 free (used);
8495
8496 if (some_unused)
8497 {
8498 bfd_byte *contents, *src;
8499 unsigned long off;
8500 Elf_Internal_Sym *sym;
8501 bfd_boolean local_toc_syms = FALSE;
8502
8503 /* Shuffle the toc contents, and at the same time convert the
8504 skip array from booleans into offsets. */
8505 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
8506 goto error_ret;
8507
8508 elf_section_data (toc)->this_hdr.contents = contents;
8509
8510 for (src = contents, off = 0, drop = skip;
8511 src < contents + toc->size;
8512 src += 8, ++drop)
8513 {
8514 if ((*drop & (can_optimize | ref_from_discarded)) != 0)
8515 off += 8;
8516 else if (off != 0)
8517 {
8518 *drop = off;
8519 memcpy (src - off, src, 8);
8520 }
8521 }
8522 *drop = off;
8523 toc->rawsize = toc->size;
8524 toc->size = src - contents - off;
8525
8526 /* Adjust addends for relocs against the toc section sym,
8527 and optimize any accesses we can. */
8528 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8529 {
8530 if (sec->reloc_count == 0
8531 || elf_discarded_section (sec))
8532 continue;
8533
8534 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8535 info->keep_memory);
8536 if (relstart == NULL)
8537 goto error_ret;
8538
8539 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8540 {
8541 enum elf_ppc64_reloc_type r_type;
8542 unsigned long r_symndx;
8543 asection *sym_sec;
8544 struct elf_link_hash_entry *h;
8545 bfd_vma val;
8546
8547 r_type = ELF64_R_TYPE (rel->r_info);
8548 switch (r_type)
8549 {
8550 default:
8551 continue;
8552
8553 case R_PPC64_TOC16:
8554 case R_PPC64_TOC16_LO:
8555 case R_PPC64_TOC16_HI:
8556 case R_PPC64_TOC16_HA:
8557 case R_PPC64_TOC16_DS:
8558 case R_PPC64_TOC16_LO_DS:
8559 case R_PPC64_ADDR64:
8560 break;
8561 }
8562
8563 r_symndx = ELF64_R_SYM (rel->r_info);
8564 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8565 r_symndx, ibfd))
8566 goto error_ret;
8567
8568 if (sym_sec != toc)
8569 continue;
8570
8571 if (h != NULL)
8572 val = h->root.u.def.value;
8573 else
8574 {
8575 val = sym->st_value;
8576 if (val != 0)
8577 local_toc_syms = TRUE;
8578 }
8579
8580 val += rel->r_addend;
8581
8582 if (val > toc->rawsize)
8583 val = toc->rawsize;
8584 else if ((skip[val >> 3] & ref_from_discarded) != 0)
8585 continue;
8586 else if ((skip[val >> 3] & can_optimize) != 0)
8587 {
8588 Elf_Internal_Rela *tocrel
8589 = toc_relocs + (skip[val >> 3] >> 2);
8590 unsigned long tsym = ELF64_R_SYM (tocrel->r_info);
8591
8592 switch (r_type)
8593 {
8594 case R_PPC64_TOC16_HA:
8595 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_TOC16_HA);
8596 break;
8597
8598 case R_PPC64_TOC16_LO_DS:
8599 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_LO_DS_OPT);
8600 break;
8601
8602 default:
8603 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
8604 ppc_howto_init ();
8605 info->callbacks->einfo
8606 (_("%P: %H: %s relocation references "
8607 "optimized away TOC entry\n"),
8608 ibfd, sec, rel->r_offset,
8609 ppc64_elf_howto_table[r_type]->name);
8610 bfd_set_error (bfd_error_bad_value);
8611 goto error_ret;
8612 }
8613 rel->r_addend = tocrel->r_addend;
8614 elf_section_data (sec)->relocs = relstart;
8615 continue;
8616 }
8617
8618 if (h != NULL || sym->st_value != 0)
8619 continue;
8620
8621 rel->r_addend -= skip[val >> 3];
8622 elf_section_data (sec)->relocs = relstart;
8623 }
8624
8625 if (elf_section_data (sec)->relocs != relstart)
8626 free (relstart);
8627 }
8628
8629 /* We shouldn't have local or global symbols defined in the TOC,
8630 but handle them anyway. */
8631 if (local_syms != NULL)
8632 for (sym = local_syms;
8633 sym < local_syms + symtab_hdr->sh_info;
8634 ++sym)
8635 if (sym->st_value != 0
8636 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
8637 {
8638 unsigned long i;
8639
8640 if (sym->st_value > toc->rawsize)
8641 i = toc->rawsize >> 3;
8642 else
8643 i = sym->st_value >> 3;
8644
8645 if ((skip[i] & (ref_from_discarded | can_optimize)) != 0)
8646 {
8647 if (local_toc_syms)
8648 (*_bfd_error_handler)
8649 (_("%s defined on removed toc entry"),
8650 bfd_elf_sym_name (ibfd, symtab_hdr, sym, NULL));
8651 do
8652 ++i;
8653 while ((skip[i] & (ref_from_discarded | can_optimize)));
8654 sym->st_value = (bfd_vma) i << 3;
8655 }
8656
8657 sym->st_value -= skip[i];
8658 symtab_hdr->contents = (unsigned char *) local_syms;
8659 }
8660
8661 /* Adjust any global syms defined in this toc input section. */
8662 if (toc_inf.global_toc_syms)
8663 {
8664 toc_inf.toc = toc;
8665 toc_inf.skip = skip;
8666 toc_inf.global_toc_syms = FALSE;
8667 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
8668 &toc_inf);
8669 }
8670
8671 if (toc->reloc_count != 0)
8672 {
8673 Elf_Internal_Shdr *rel_hdr;
8674 Elf_Internal_Rela *wrel;
8675 bfd_size_type sz;
8676
8677 /* Remove unused toc relocs, and adjust those we keep. */
8678 if (toc_relocs == NULL)
8679 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
8680 info->keep_memory);
8681 if (toc_relocs == NULL)
8682 goto error_ret;
8683
8684 wrel = toc_relocs;
8685 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
8686 if ((skip[rel->r_offset >> 3]
8687 & (ref_from_discarded | can_optimize)) == 0)
8688 {
8689 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
8690 wrel->r_info = rel->r_info;
8691 wrel->r_addend = rel->r_addend;
8692 ++wrel;
8693 }
8694 else if (!dec_dynrel_count (rel->r_info, toc, info,
8695 &local_syms, NULL, NULL))
8696 goto error_ret;
8697
8698 elf_section_data (toc)->relocs = toc_relocs;
8699 toc->reloc_count = wrel - toc_relocs;
8700 rel_hdr = _bfd_elf_single_rel_hdr (toc);
8701 sz = rel_hdr->sh_entsize;
8702 rel_hdr->sh_size = toc->reloc_count * sz;
8703 }
8704 }
8705 else if (toc_relocs != NULL
8706 && elf_section_data (toc)->relocs != toc_relocs)
8707 free (toc_relocs);
8708
8709 if (local_syms != NULL
8710 && symtab_hdr->contents != (unsigned char *) local_syms)
8711 {
8712 if (!info->keep_memory)
8713 free (local_syms);
8714 else
8715 symtab_hdr->contents = (unsigned char *) local_syms;
8716 }
8717 free (skip);
8718 }
8719
8720 return TRUE;
8721 }
8722
8723 /* Return true iff input section I references the TOC using
8724 instructions limited to +/-32k offsets. */
8725
8726 bfd_boolean
8727 ppc64_elf_has_small_toc_reloc (asection *i)
8728 {
8729 return (is_ppc64_elf (i->owner)
8730 && ppc64_elf_tdata (i->owner)->has_small_toc_reloc);
8731 }
8732
8733 /* Allocate space for one GOT entry. */
8734
8735 static void
8736 allocate_got (struct elf_link_hash_entry *h,
8737 struct bfd_link_info *info,
8738 struct got_entry *gent)
8739 {
8740 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8741 bfd_boolean dyn;
8742 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
8743 int entsize = (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)
8744 ? 16 : 8);
8745 int rentsize = (gent->tls_type & eh->tls_mask & TLS_GD
8746 ? 2 : 1) * sizeof (Elf64_External_Rela);
8747 asection *got = ppc64_elf_tdata (gent->owner)->got;
8748
8749 gent->got.offset = got->size;
8750 got->size += entsize;
8751
8752 dyn = htab->elf.dynamic_sections_created;
8753 if ((info->shared
8754 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
8755 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
8756 || h->root.type != bfd_link_hash_undefweak))
8757 {
8758 asection *relgot = ppc64_elf_tdata (gent->owner)->relgot;
8759 relgot->size += rentsize;
8760 }
8761 else if (h->type == STT_GNU_IFUNC)
8762 {
8763 asection *relgot = htab->reliplt;
8764 relgot->size += rentsize;
8765 htab->got_reli_size += rentsize;
8766 }
8767 }
8768
8769 /* This function merges got entries in the same toc group. */
8770
8771 static void
8772 merge_got_entries (struct got_entry **pent)
8773 {
8774 struct got_entry *ent, *ent2;
8775
8776 for (ent = *pent; ent != NULL; ent = ent->next)
8777 if (!ent->is_indirect)
8778 for (ent2 = ent->next; ent2 != NULL; ent2 = ent2->next)
8779 if (!ent2->is_indirect
8780 && ent2->addend == ent->addend
8781 && ent2->tls_type == ent->tls_type
8782 && elf_gp (ent2->owner) == elf_gp (ent->owner))
8783 {
8784 ent2->is_indirect = TRUE;
8785 ent2->got.ent = ent;
8786 }
8787 }
8788
8789 /* Allocate space in .plt, .got and associated reloc sections for
8790 dynamic relocs. */
8791
8792 static bfd_boolean
8793 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
8794 {
8795 struct bfd_link_info *info;
8796 struct ppc_link_hash_table *htab;
8797 asection *s;
8798 struct ppc_link_hash_entry *eh;
8799 struct elf_dyn_relocs *p;
8800 struct got_entry **pgent, *gent;
8801
8802 if (h->root.type == bfd_link_hash_indirect)
8803 return TRUE;
8804
8805 info = (struct bfd_link_info *) inf;
8806 htab = ppc_hash_table (info);
8807 if (htab == NULL)
8808 return FALSE;
8809
8810 if ((htab->elf.dynamic_sections_created
8811 && h->dynindx != -1
8812 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h))
8813 || h->type == STT_GNU_IFUNC)
8814 {
8815 struct plt_entry *pent;
8816 bfd_boolean doneone = FALSE;
8817 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
8818 if (pent->plt.refcount > 0)
8819 {
8820 if (!htab->elf.dynamic_sections_created
8821 || h->dynindx == -1)
8822 {
8823 s = htab->iplt;
8824 pent->plt.offset = s->size;
8825 s->size += PLT_ENTRY_SIZE;
8826 s = htab->reliplt;
8827 }
8828 else
8829 {
8830 /* If this is the first .plt entry, make room for the special
8831 first entry. */
8832 s = htab->plt;
8833 if (s->size == 0)
8834 s->size += PLT_INITIAL_ENTRY_SIZE;
8835
8836 pent->plt.offset = s->size;
8837
8838 /* Make room for this entry. */
8839 s->size += PLT_ENTRY_SIZE;
8840
8841 /* Make room for the .glink code. */
8842 s = htab->glink;
8843 if (s->size == 0)
8844 s->size += GLINK_CALL_STUB_SIZE;
8845 /* We need bigger stubs past index 32767. */
8846 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
8847 s->size += 4;
8848 s->size += 2*4;
8849
8850 /* We also need to make an entry in the .rela.plt section. */
8851 s = htab->relplt;
8852 }
8853 s->size += sizeof (Elf64_External_Rela);
8854 doneone = TRUE;
8855 }
8856 else
8857 pent->plt.offset = (bfd_vma) -1;
8858 if (!doneone)
8859 {
8860 h->plt.plist = NULL;
8861 h->needs_plt = 0;
8862 }
8863 }
8864 else
8865 {
8866 h->plt.plist = NULL;
8867 h->needs_plt = 0;
8868 }
8869
8870 eh = (struct ppc_link_hash_entry *) h;
8871 /* Run through the TLS GD got entries first if we're changing them
8872 to TPREL. */
8873 if ((eh->tls_mask & TLS_TPRELGD) != 0)
8874 for (gent = h->got.glist; gent != NULL; gent = gent->next)
8875 if (gent->got.refcount > 0
8876 && (gent->tls_type & TLS_GD) != 0)
8877 {
8878 /* This was a GD entry that has been converted to TPREL. If
8879 there happens to be a TPREL entry we can use that one. */
8880 struct got_entry *ent;
8881 for (ent = h->got.glist; ent != NULL; ent = ent->next)
8882 if (ent->got.refcount > 0
8883 && (ent->tls_type & TLS_TPREL) != 0
8884 && ent->addend == gent->addend
8885 && ent->owner == gent->owner)
8886 {
8887 gent->got.refcount = 0;
8888 break;
8889 }
8890
8891 /* If not, then we'll be using our own TPREL entry. */
8892 if (gent->got.refcount != 0)
8893 gent->tls_type = TLS_TLS | TLS_TPREL;
8894 }
8895
8896 /* Remove any list entry that won't generate a word in the GOT before
8897 we call merge_got_entries. Otherwise we risk merging to empty
8898 entries. */
8899 pgent = &h->got.glist;
8900 while ((gent = *pgent) != NULL)
8901 if (gent->got.refcount > 0)
8902 {
8903 if ((gent->tls_type & TLS_LD) != 0
8904 && !h->def_dynamic)
8905 {
8906 ppc64_tlsld_got (gent->owner)->got.refcount += 1;
8907 *pgent = gent->next;
8908 }
8909 else
8910 pgent = &gent->next;
8911 }
8912 else
8913 *pgent = gent->next;
8914
8915 if (!htab->do_multi_toc)
8916 merge_got_entries (&h->got.glist);
8917
8918 for (gent = h->got.glist; gent != NULL; gent = gent->next)
8919 if (!gent->is_indirect)
8920 {
8921 /* Make sure this symbol is output as a dynamic symbol.
8922 Undefined weak syms won't yet be marked as dynamic,
8923 nor will all TLS symbols. */
8924 if (h->dynindx == -1
8925 && !h->forced_local
8926 && h->type != STT_GNU_IFUNC
8927 && htab->elf.dynamic_sections_created)
8928 {
8929 if (! bfd_elf_link_record_dynamic_symbol (info, h))
8930 return FALSE;
8931 }
8932
8933 if (!is_ppc64_elf (gent->owner))
8934 abort ();
8935
8936 allocate_got (h, info, gent);
8937 }
8938
8939 if (eh->dyn_relocs == NULL
8940 || (!htab->elf.dynamic_sections_created
8941 && h->type != STT_GNU_IFUNC))
8942 return TRUE;
8943
8944 /* In the shared -Bsymbolic case, discard space allocated for
8945 dynamic pc-relative relocs against symbols which turn out to be
8946 defined in regular objects. For the normal shared case, discard
8947 space for relocs that have become local due to symbol visibility
8948 changes. */
8949
8950 if (info->shared)
8951 {
8952 /* Relocs that use pc_count are those that appear on a call insn,
8953 or certain REL relocs (see must_be_dyn_reloc) that can be
8954 generated via assembly. We want calls to protected symbols to
8955 resolve directly to the function rather than going via the plt.
8956 If people want function pointer comparisons to work as expected
8957 then they should avoid writing weird assembly. */
8958 if (SYMBOL_CALLS_LOCAL (info, h))
8959 {
8960 struct elf_dyn_relocs **pp;
8961
8962 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
8963 {
8964 p->count -= p->pc_count;
8965 p->pc_count = 0;
8966 if (p->count == 0)
8967 *pp = p->next;
8968 else
8969 pp = &p->next;
8970 }
8971 }
8972
8973 /* Also discard relocs on undefined weak syms with non-default
8974 visibility. */
8975 if (eh->dyn_relocs != NULL
8976 && h->root.type == bfd_link_hash_undefweak)
8977 {
8978 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
8979 eh->dyn_relocs = NULL;
8980
8981 /* Make sure this symbol is output as a dynamic symbol.
8982 Undefined weak syms won't yet be marked as dynamic. */
8983 else if (h->dynindx == -1
8984 && !h->forced_local)
8985 {
8986 if (! bfd_elf_link_record_dynamic_symbol (info, h))
8987 return FALSE;
8988 }
8989 }
8990 }
8991 else if (h->type == STT_GNU_IFUNC)
8992 {
8993 if (!h->non_got_ref)
8994 eh->dyn_relocs = NULL;
8995 }
8996 else if (ELIMINATE_COPY_RELOCS)
8997 {
8998 /* For the non-shared case, discard space for relocs against
8999 symbols which turn out to need copy relocs or are not
9000 dynamic. */
9001
9002 if (!h->non_got_ref
9003 && !h->def_regular)
9004 {
9005 /* Make sure this symbol is output as a dynamic symbol.
9006 Undefined weak syms won't yet be marked as dynamic. */
9007 if (h->dynindx == -1
9008 && !h->forced_local)
9009 {
9010 if (! bfd_elf_link_record_dynamic_symbol (info, h))
9011 return FALSE;
9012 }
9013
9014 /* If that succeeded, we know we'll be keeping all the
9015 relocs. */
9016 if (h->dynindx != -1)
9017 goto keep;
9018 }
9019
9020 eh->dyn_relocs = NULL;
9021
9022 keep: ;
9023 }
9024
9025 /* Finally, allocate space. */
9026 for (p = eh->dyn_relocs; p != NULL; p = p->next)
9027 {
9028 asection *sreloc = elf_section_data (p->sec)->sreloc;
9029 if (!htab->elf.dynamic_sections_created)
9030 sreloc = htab->reliplt;
9031 sreloc->size += p->count * sizeof (Elf64_External_Rela);
9032 }
9033
9034 return TRUE;
9035 }
9036
9037 /* Find any dynamic relocs that apply to read-only sections. */
9038
9039 static bfd_boolean
9040 readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
9041 {
9042 struct ppc_link_hash_entry *eh;
9043 struct elf_dyn_relocs *p;
9044
9045 eh = (struct ppc_link_hash_entry *) h;
9046 for (p = eh->dyn_relocs; p != NULL; p = p->next)
9047 {
9048 asection *s = p->sec->output_section;
9049
9050 if (s != NULL && (s->flags & SEC_READONLY) != 0)
9051 {
9052 struct bfd_link_info *info = inf;
9053
9054 info->flags |= DF_TEXTREL;
9055
9056 /* Not an error, just cut short the traversal. */
9057 return FALSE;
9058 }
9059 }
9060 return TRUE;
9061 }
9062
9063 /* Set the sizes of the dynamic sections. */
9064
9065 static bfd_boolean
9066 ppc64_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
9067 struct bfd_link_info *info)
9068 {
9069 struct ppc_link_hash_table *htab;
9070 bfd *dynobj;
9071 asection *s;
9072 bfd_boolean relocs;
9073 bfd *ibfd;
9074 struct got_entry *first_tlsld;
9075
9076 htab = ppc_hash_table (info);
9077 if (htab == NULL)
9078 return FALSE;
9079
9080 dynobj = htab->elf.dynobj;
9081 if (dynobj == NULL)
9082 abort ();
9083
9084 if (htab->elf.dynamic_sections_created)
9085 {
9086 /* Set the contents of the .interp section to the interpreter. */
9087 if (info->executable)
9088 {
9089 s = bfd_get_section_by_name (dynobj, ".interp");
9090 if (s == NULL)
9091 abort ();
9092 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
9093 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
9094 }
9095 }
9096
9097 /* Set up .got offsets for local syms, and space for local dynamic
9098 relocs. */
9099 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
9100 {
9101 struct got_entry **lgot_ents;
9102 struct got_entry **end_lgot_ents;
9103 struct plt_entry **local_plt;
9104 struct plt_entry **end_local_plt;
9105 unsigned char *lgot_masks;
9106 bfd_size_type locsymcount;
9107 Elf_Internal_Shdr *symtab_hdr;
9108 asection *srel;
9109
9110 if (!is_ppc64_elf (ibfd))
9111 continue;
9112
9113 for (s = ibfd->sections; s != NULL; s = s->next)
9114 {
9115 struct elf_dyn_relocs *p;
9116
9117 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
9118 {
9119 if (!bfd_is_abs_section (p->sec)
9120 && bfd_is_abs_section (p->sec->output_section))
9121 {
9122 /* Input section has been discarded, either because
9123 it is a copy of a linkonce section or due to
9124 linker script /DISCARD/, so we'll be discarding
9125 the relocs too. */
9126 }
9127 else if (p->count != 0)
9128 {
9129 srel = elf_section_data (p->sec)->sreloc;
9130 if (!htab->elf.dynamic_sections_created)
9131 srel = htab->reliplt;
9132 srel->size += p->count * sizeof (Elf64_External_Rela);
9133 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
9134 info->flags |= DF_TEXTREL;
9135 }
9136 }
9137 }
9138
9139 lgot_ents = elf_local_got_ents (ibfd);
9140 if (!lgot_ents)
9141 continue;
9142
9143 symtab_hdr = &elf_symtab_hdr (ibfd);
9144 locsymcount = symtab_hdr->sh_info;
9145 end_lgot_ents = lgot_ents + locsymcount;
9146 local_plt = (struct plt_entry **) end_lgot_ents;
9147 end_local_plt = local_plt + locsymcount;
9148 lgot_masks = (unsigned char *) end_local_plt;
9149 s = ppc64_elf_tdata (ibfd)->got;
9150 srel = ppc64_elf_tdata (ibfd)->relgot;
9151 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
9152 {
9153 struct got_entry **pent, *ent;
9154
9155 pent = lgot_ents;
9156 while ((ent = *pent) != NULL)
9157 if (ent->got.refcount > 0)
9158 {
9159 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
9160 {
9161 ppc64_tlsld_got (ibfd)->got.refcount += 1;
9162 *pent = ent->next;
9163 }
9164 else
9165 {
9166 unsigned int num = 1;
9167 ent->got.offset = s->size;
9168 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
9169 num = 2;
9170 s->size += num * 8;
9171 if (info->shared)
9172 srel->size += num * sizeof (Elf64_External_Rela);
9173 else if ((*lgot_masks & PLT_IFUNC) != 0)
9174 {
9175 htab->reliplt->size
9176 += num * sizeof (Elf64_External_Rela);
9177 htab->got_reli_size
9178 += num * sizeof (Elf64_External_Rela);
9179 }
9180 pent = &ent->next;
9181 }
9182 }
9183 else
9184 *pent = ent->next;
9185 }
9186
9187 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
9188 for (; local_plt < end_local_plt; ++local_plt)
9189 {
9190 struct plt_entry *ent;
9191
9192 for (ent = *local_plt; ent != NULL; ent = ent->next)
9193 if (ent->plt.refcount > 0)
9194 {
9195 s = htab->iplt;
9196 ent->plt.offset = s->size;
9197 s->size += PLT_ENTRY_SIZE;
9198
9199 htab->reliplt->size += sizeof (Elf64_External_Rela);
9200 }
9201 else
9202 ent->plt.offset = (bfd_vma) -1;
9203 }
9204 }
9205
9206 /* Allocate global sym .plt and .got entries, and space for global
9207 sym dynamic relocs. */
9208 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
9209
9210 first_tlsld = NULL;
9211 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
9212 {
9213 struct got_entry *ent;
9214
9215 if (!is_ppc64_elf (ibfd))
9216 continue;
9217
9218 ent = ppc64_tlsld_got (ibfd);
9219 if (ent->got.refcount > 0)
9220 {
9221 if (!htab->do_multi_toc && first_tlsld != NULL)
9222 {
9223 ent->is_indirect = TRUE;
9224 ent->got.ent = first_tlsld;
9225 }
9226 else
9227 {
9228 if (first_tlsld == NULL)
9229 first_tlsld = ent;
9230 s = ppc64_elf_tdata (ibfd)->got;
9231 ent->got.offset = s->size;
9232 ent->owner = ibfd;
9233 s->size += 16;
9234 if (info->shared)
9235 {
9236 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
9237 srel->size += sizeof (Elf64_External_Rela);
9238 }
9239 }
9240 }
9241 else
9242 ent->got.offset = (bfd_vma) -1;
9243 }
9244
9245 /* We now have determined the sizes of the various dynamic sections.
9246 Allocate memory for them. */
9247 relocs = FALSE;
9248 for (s = dynobj->sections; s != NULL; s = s->next)
9249 {
9250 if ((s->flags & SEC_LINKER_CREATED) == 0)
9251 continue;
9252
9253 if (s == htab->brlt || s == htab->relbrlt)
9254 /* These haven't been allocated yet; don't strip. */
9255 continue;
9256 else if (s == htab->got
9257 || s == htab->plt
9258 || s == htab->iplt
9259 || s == htab->glink
9260 || s == htab->dynbss)
9261 {
9262 /* Strip this section if we don't need it; see the
9263 comment below. */
9264 }
9265 else if (s == htab->glink_eh_frame)
9266 {
9267 if (!bfd_is_abs_section (s->output_section))
9268 /* Not sized yet. */
9269 continue;
9270 }
9271 else if (CONST_STRNEQ (s->name, ".rela"))
9272 {
9273 if (s->size != 0)
9274 {
9275 if (s != htab->relplt)
9276 relocs = TRUE;
9277
9278 /* We use the reloc_count field as a counter if we need
9279 to copy relocs into the output file. */
9280 s->reloc_count = 0;
9281 }
9282 }
9283 else
9284 {
9285 /* It's not one of our sections, so don't allocate space. */
9286 continue;
9287 }
9288
9289 if (s->size == 0)
9290 {
9291 /* If we don't need this section, strip it from the
9292 output file. This is mostly to handle .rela.bss and
9293 .rela.plt. We must create both sections in
9294 create_dynamic_sections, because they must be created
9295 before the linker maps input sections to output
9296 sections. The linker does that before
9297 adjust_dynamic_symbol is called, and it is that
9298 function which decides whether anything needs to go
9299 into these sections. */
9300 s->flags |= SEC_EXCLUDE;
9301 continue;
9302 }
9303
9304 if ((s->flags & SEC_HAS_CONTENTS) == 0)
9305 continue;
9306
9307 /* Allocate memory for the section contents. We use bfd_zalloc
9308 here in case unused entries are not reclaimed before the
9309 section's contents are written out. This should not happen,
9310 but this way if it does we get a R_PPC64_NONE reloc in .rela
9311 sections instead of garbage.
9312 We also rely on the section contents being zero when writing
9313 the GOT. */
9314 s->contents = bfd_zalloc (dynobj, s->size);
9315 if (s->contents == NULL)
9316 return FALSE;
9317 }
9318
9319 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
9320 {
9321 if (!is_ppc64_elf (ibfd))
9322 continue;
9323
9324 s = ppc64_elf_tdata (ibfd)->got;
9325 if (s != NULL && s != htab->got)
9326 {
9327 if (s->size == 0)
9328 s->flags |= SEC_EXCLUDE;
9329 else
9330 {
9331 s->contents = bfd_zalloc (ibfd, s->size);
9332 if (s->contents == NULL)
9333 return FALSE;
9334 }
9335 }
9336 s = ppc64_elf_tdata (ibfd)->relgot;
9337 if (s != NULL)
9338 {
9339 if (s->size == 0)
9340 s->flags |= SEC_EXCLUDE;
9341 else
9342 {
9343 s->contents = bfd_zalloc (ibfd, s->size);
9344 if (s->contents == NULL)
9345 return FALSE;
9346 relocs = TRUE;
9347 s->reloc_count = 0;
9348 }
9349 }
9350 }
9351
9352 if (htab->elf.dynamic_sections_created)
9353 {
9354 /* Add some entries to the .dynamic section. We fill in the
9355 values later, in ppc64_elf_finish_dynamic_sections, but we
9356 must add the entries now so that we get the correct size for
9357 the .dynamic section. The DT_DEBUG entry is filled in by the
9358 dynamic linker and used by the debugger. */
9359 #define add_dynamic_entry(TAG, VAL) \
9360 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
9361
9362 if (info->executable)
9363 {
9364 if (!add_dynamic_entry (DT_DEBUG, 0))
9365 return FALSE;
9366 }
9367
9368 if (htab->plt != NULL && htab->plt->size != 0)
9369 {
9370 if (!add_dynamic_entry (DT_PLTGOT, 0)
9371 || !add_dynamic_entry (DT_PLTRELSZ, 0)
9372 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
9373 || !add_dynamic_entry (DT_JMPREL, 0)
9374 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
9375 return FALSE;
9376 }
9377
9378 if (NO_OPD_RELOCS)
9379 {
9380 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
9381 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
9382 return FALSE;
9383 }
9384
9385 if (!htab->no_tls_get_addr_opt
9386 && htab->tls_get_addr_fd != NULL
9387 && htab->tls_get_addr_fd->elf.plt.plist != NULL
9388 && !add_dynamic_entry (DT_PPC64_TLSOPT, 0))
9389 return FALSE;
9390
9391 if (relocs)
9392 {
9393 if (!add_dynamic_entry (DT_RELA, 0)
9394 || !add_dynamic_entry (DT_RELASZ, 0)
9395 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
9396 return FALSE;
9397
9398 /* If any dynamic relocs apply to a read-only section,
9399 then we need a DT_TEXTREL entry. */
9400 if ((info->flags & DF_TEXTREL) == 0)
9401 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info);
9402
9403 if ((info->flags & DF_TEXTREL) != 0)
9404 {
9405 if (!add_dynamic_entry (DT_TEXTREL, 0))
9406 return FALSE;
9407 }
9408 }
9409 }
9410 #undef add_dynamic_entry
9411
9412 return TRUE;
9413 }
9414
9415 /* Determine the type of stub needed, if any, for a call. */
9416
9417 static inline enum ppc_stub_type
9418 ppc_type_of_stub (asection *input_sec,
9419 const Elf_Internal_Rela *rel,
9420 struct ppc_link_hash_entry **hash,
9421 struct plt_entry **plt_ent,
9422 bfd_vma destination)
9423 {
9424 struct ppc_link_hash_entry *h = *hash;
9425 bfd_vma location;
9426 bfd_vma branch_offset;
9427 bfd_vma max_branch_offset;
9428 enum elf_ppc64_reloc_type r_type;
9429
9430 if (h != NULL)
9431 {
9432 struct plt_entry *ent;
9433 struct ppc_link_hash_entry *fdh = h;
9434 if (h->oh != NULL
9435 && h->oh->is_func_descriptor)
9436 {
9437 fdh = ppc_follow_link (h->oh);
9438 *hash = fdh;
9439 }
9440
9441 for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next)
9442 if (ent->addend == rel->r_addend
9443 && ent->plt.offset != (bfd_vma) -1)
9444 {
9445 *plt_ent = ent;
9446 return ppc_stub_plt_call;
9447 }
9448
9449 /* Here, we know we don't have a plt entry. If we don't have a
9450 either a defined function descriptor or a defined entry symbol
9451 in a regular object file, then it is pointless trying to make
9452 any other type of stub. */
9453 if (!is_static_defined (&fdh->elf)
9454 && !is_static_defined (&h->elf))
9455 return ppc_stub_none;
9456 }
9457 else if (elf_local_got_ents (input_sec->owner) != NULL)
9458 {
9459 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (input_sec->owner);
9460 struct plt_entry **local_plt = (struct plt_entry **)
9461 elf_local_got_ents (input_sec->owner) + symtab_hdr->sh_info;
9462 unsigned long r_symndx = ELF64_R_SYM (rel->r_info);
9463
9464 if (local_plt[r_symndx] != NULL)
9465 {
9466 struct plt_entry *ent;
9467
9468 for (ent = local_plt[r_symndx]; ent != NULL; ent = ent->next)
9469 if (ent->addend == rel->r_addend
9470 && ent->plt.offset != (bfd_vma) -1)
9471 {
9472 *plt_ent = ent;
9473 return ppc_stub_plt_call;
9474 }
9475 }
9476 }
9477
9478 /* Determine where the call point is. */
9479 location = (input_sec->output_offset
9480 + input_sec->output_section->vma
9481 + rel->r_offset);
9482
9483 branch_offset = destination - location;
9484 r_type = ELF64_R_TYPE (rel->r_info);
9485
9486 /* Determine if a long branch stub is needed. */
9487 max_branch_offset = 1 << 25;
9488 if (r_type != R_PPC64_REL24)
9489 max_branch_offset = 1 << 15;
9490
9491 if (branch_offset + max_branch_offset >= 2 * max_branch_offset)
9492 /* We need a stub. Figure out whether a long_branch or plt_branch
9493 is needed later. */
9494 return ppc_stub_long_branch;
9495
9496 return ppc_stub_none;
9497 }
9498
9499 /* With power7 weakly ordered memory model, it is possible for ld.so
9500 to update a plt entry in one thread and have another thread see a
9501 stale zero toc entry. To avoid this we need some sort of acquire
9502 barrier in the call stub. One solution is to make the load of the
9503 toc word seem to appear to depend on the load of the function entry
9504 word. Another solution is to test for r2 being zero, and branch to
9505 the appropriate glink entry if so.
9506
9507 . fake dep barrier compare
9508 . ld 11,xxx(2) ld 11,xxx(2)
9509 . mtctr 11 mtctr 11
9510 . xor 11,11,11 ld 2,xxx+8(2)
9511 . add 2,2,11 cmpldi 2,0
9512 . ld 2,xxx+8(2) bnectr+
9513 . bctr b <glink_entry>
9514
9515 The solution involving the compare turns out to be faster, so
9516 that's what we use unless the branch won't reach. */
9517
9518 #define ALWAYS_USE_FAKE_DEP 0
9519 #define ALWAYS_EMIT_R2SAVE 0
9520
9521 #define PPC_LO(v) ((v) & 0xffff)
9522 #define PPC_HI(v) (((v) >> 16) & 0xffff)
9523 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
9524
9525 static inline unsigned int
9526 plt_stub_size (struct ppc_link_hash_table *htab,
9527 struct ppc_stub_hash_entry *stub_entry,
9528 bfd_vma off)
9529 {
9530 unsigned size = PLT_CALL_STUB_SIZE;
9531
9532 if (!(ALWAYS_EMIT_R2SAVE
9533 || stub_entry->stub_type == ppc_stub_plt_call_r2save))
9534 size -= 4;
9535 if (!htab->plt_static_chain)
9536 size -= 4;
9537 if (htab->plt_thread_safe)
9538 size += 8;
9539 if (PPC_HA (off) == 0)
9540 size -= 4;
9541 if (PPC_HA (off + 8 + 8 * htab->plt_static_chain) != PPC_HA (off))
9542 size += 4;
9543 if (stub_entry->h != NULL
9544 && (stub_entry->h == htab->tls_get_addr_fd
9545 || stub_entry->h == htab->tls_get_addr)
9546 && !htab->no_tls_get_addr_opt)
9547 size += 13 * 4;
9548 return size;
9549 }
9550
9551 /* If this stub would cross fewer 2**plt_stub_align boundaries if we align,
9552 then return the padding needed to do so. */
9553 static inline unsigned int
9554 plt_stub_pad (struct ppc_link_hash_table *htab,
9555 struct ppc_stub_hash_entry *stub_entry,
9556 bfd_vma plt_off)
9557 {
9558 int stub_align = 1 << htab->plt_stub_align;
9559 unsigned stub_size = plt_stub_size (htab, stub_entry, plt_off);
9560 bfd_vma stub_off = stub_entry->stub_sec->size;
9561
9562 if (((stub_off + stub_size - 1) & -stub_align) - (stub_off & -stub_align)
9563 > (stub_size & -stub_align))
9564 return stub_align - (stub_off & (stub_align - 1));
9565 return 0;
9566 }
9567
9568 /* Build a .plt call stub. */
9569
9570 static inline bfd_byte *
9571 build_plt_stub (struct ppc_link_hash_table *htab,
9572 struct ppc_stub_hash_entry *stub_entry,
9573 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
9574 {
9575 bfd *obfd = htab->stub_bfd;
9576 bfd_boolean plt_static_chain = htab->plt_static_chain;
9577 bfd_boolean plt_thread_safe = htab->plt_thread_safe;
9578 bfd_boolean use_fake_dep = plt_thread_safe;
9579 bfd_vma cmp_branch_off = 0;
9580
9581 if (!ALWAYS_USE_FAKE_DEP
9582 && plt_thread_safe
9583 && !(stub_entry->h != NULL
9584 && (stub_entry->h == htab->tls_get_addr_fd
9585 || stub_entry->h == htab->tls_get_addr)
9586 && !htab->no_tls_get_addr_opt))
9587 {
9588 bfd_vma pltoff = stub_entry->plt_ent->plt.offset & ~1;
9589 bfd_vma pltindex = (pltoff - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE;
9590 bfd_vma glinkoff = GLINK_CALL_STUB_SIZE + pltindex * 8;
9591 bfd_vma to, from;
9592
9593 if (pltindex > 32767)
9594 glinkoff += (pltindex - 32767) * 4;
9595 to = (glinkoff
9596 + htab->glink->output_offset
9597 + htab->glink->output_section->vma);
9598 from = (p - stub_entry->stub_sec->contents
9599 + 4 * (ALWAYS_EMIT_R2SAVE
9600 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
9601 + 4 * (PPC_HA (offset) != 0)
9602 + 4 * (PPC_HA (offset + 8 + 8 * plt_static_chain)
9603 != PPC_HA (offset))
9604 + 4 * (plt_static_chain != 0)
9605 + 20
9606 + stub_entry->stub_sec->output_offset
9607 + stub_entry->stub_sec->output_section->vma);
9608 cmp_branch_off = to - from;
9609 use_fake_dep = cmp_branch_off + (1 << 25) >= (1 << 26);
9610 }
9611
9612 if (PPC_HA (offset) != 0)
9613 {
9614 if (r != NULL)
9615 {
9616 if (ALWAYS_EMIT_R2SAVE
9617 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
9618 r[0].r_offset += 4;
9619 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
9620 r[1].r_offset = r[0].r_offset + 4;
9621 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9622 r[1].r_addend = r[0].r_addend;
9623 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
9624 {
9625 r[2].r_offset = r[1].r_offset + 4;
9626 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO);
9627 r[2].r_addend = r[0].r_addend;
9628 }
9629 else
9630 {
9631 r[2].r_offset = r[1].r_offset + 8 + 8 * use_fake_dep;
9632 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9633 r[2].r_addend = r[0].r_addend + 8;
9634 if (plt_static_chain)
9635 {
9636 r[3].r_offset = r[2].r_offset + 4;
9637 r[3].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9638 r[3].r_addend = r[0].r_addend + 16;
9639 }
9640 }
9641 }
9642 if (ALWAYS_EMIT_R2SAVE
9643 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
9644 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
9645 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
9646 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
9647 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
9648 {
9649 bfd_put_32 (obfd, ADDI_R12_R12 | PPC_LO (offset), p), p += 4;
9650 offset = 0;
9651 }
9652 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
9653 if (use_fake_dep)
9654 {
9655 bfd_put_32 (obfd, XOR_R11_R11_R11, p), p += 4;
9656 bfd_put_32 (obfd, ADD_R12_R12_R11, p), p += 4;
9657 }
9658 bfd_put_32 (obfd, LD_R2_0R12 | PPC_LO (offset + 8), p), p += 4;
9659 if (plt_static_chain)
9660 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset + 16), p), p += 4;
9661 }
9662 else
9663 {
9664 if (r != NULL)
9665 {
9666 if (ALWAYS_EMIT_R2SAVE
9667 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
9668 r[0].r_offset += 4;
9669 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9670 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
9671 {
9672 r[1].r_offset = r[0].r_offset + 4;
9673 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16);
9674 r[1].r_addend = r[0].r_addend;
9675 }
9676 else
9677 {
9678 r[1].r_offset = r[0].r_offset + 8 + 8 * use_fake_dep;
9679 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9680 r[1].r_addend = r[0].r_addend + 8 + 8 * plt_static_chain;
9681 if (plt_static_chain)
9682 {
9683 r[2].r_offset = r[1].r_offset + 4;
9684 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9685 r[2].r_addend = r[0].r_addend + 8;
9686 }
9687 }
9688 }
9689 if (ALWAYS_EMIT_R2SAVE
9690 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
9691 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
9692 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset), p), p += 4;
9693 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
9694 {
9695 bfd_put_32 (obfd, ADDI_R2_R2 | PPC_LO (offset), p), p += 4;
9696 offset = 0;
9697 }
9698 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
9699 if (use_fake_dep)
9700 {
9701 bfd_put_32 (obfd, XOR_R11_R11_R11, p), p += 4;
9702 bfd_put_32 (obfd, ADD_R2_R2_R11, p), p += 4;
9703 }
9704 if (plt_static_chain)
9705 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset + 16), p), p += 4;
9706 bfd_put_32 (obfd, LD_R2_0R2 | PPC_LO (offset + 8), p), p += 4;
9707 }
9708 if (plt_thread_safe && !use_fake_dep)
9709 {
9710 bfd_put_32 (obfd, CMPLDI_R2_0, p), p += 4;
9711 bfd_put_32 (obfd, BNECTR_P4, p), p += 4;
9712 bfd_put_32 (obfd, B_DOT + cmp_branch_off, p), p += 4;
9713 }
9714 else
9715 bfd_put_32 (obfd, BCTR, p), p += 4;
9716 return p;
9717 }
9718
9719 /* Build a special .plt call stub for __tls_get_addr. */
9720
9721 #define LD_R11_0R3 0xe9630000
9722 #define LD_R12_0R3 0xe9830000
9723 #define MR_R0_R3 0x7c601b78
9724 #define CMPDI_R11_0 0x2c2b0000
9725 #define ADD_R3_R12_R13 0x7c6c6a14
9726 #define BEQLR 0x4d820020
9727 #define MR_R3_R0 0x7c030378
9728 #define MFLR_R11 0x7d6802a6
9729 #define STD_R11_0R1 0xf9610000
9730 #define BCTRL 0x4e800421
9731 #define LD_R11_0R1 0xe9610000
9732 #define LD_R2_0R1 0xe8410000
9733 #define MTLR_R11 0x7d6803a6
9734
9735 static inline bfd_byte *
9736 build_tls_get_addr_stub (struct ppc_link_hash_table *htab,
9737 struct ppc_stub_hash_entry *stub_entry,
9738 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
9739 {
9740 bfd *obfd = htab->stub_bfd;
9741
9742 bfd_put_32 (obfd, LD_R11_0R3 + 0, p), p += 4;
9743 bfd_put_32 (obfd, LD_R12_0R3 + 8, p), p += 4;
9744 bfd_put_32 (obfd, MR_R0_R3, p), p += 4;
9745 bfd_put_32 (obfd, CMPDI_R11_0, p), p += 4;
9746 bfd_put_32 (obfd, ADD_R3_R12_R13, p), p += 4;
9747 bfd_put_32 (obfd, BEQLR, p), p += 4;
9748 bfd_put_32 (obfd, MR_R3_R0, p), p += 4;
9749 bfd_put_32 (obfd, MFLR_R11, p), p += 4;
9750 bfd_put_32 (obfd, STD_R11_0R1 + 32, p), p += 4;
9751
9752 if (r != NULL)
9753 r[0].r_offset += 9 * 4;
9754 p = build_plt_stub (htab, stub_entry, p, offset, r);
9755 bfd_put_32 (obfd, BCTRL, p - 4);
9756
9757 bfd_put_32 (obfd, LD_R11_0R1 + 32, p), p += 4;
9758 bfd_put_32 (obfd, LD_R2_0R1 + 40, p), p += 4;
9759 bfd_put_32 (obfd, MTLR_R11, p), p += 4;
9760 bfd_put_32 (obfd, BLR, p), p += 4;
9761
9762 return p;
9763 }
9764
9765 static Elf_Internal_Rela *
9766 get_relocs (asection *sec, int count)
9767 {
9768 Elf_Internal_Rela *relocs;
9769 struct bfd_elf_section_data *elfsec_data;
9770
9771 elfsec_data = elf_section_data (sec);
9772 relocs = elfsec_data->relocs;
9773 if (relocs == NULL)
9774 {
9775 bfd_size_type relsize;
9776 relsize = sec->reloc_count * sizeof (*relocs);
9777 relocs = bfd_alloc (sec->owner, relsize);
9778 if (relocs == NULL)
9779 return NULL;
9780 elfsec_data->relocs = relocs;
9781 elfsec_data->rela.hdr = bfd_zalloc (sec->owner,
9782 sizeof (Elf_Internal_Shdr));
9783 if (elfsec_data->rela.hdr == NULL)
9784 return NULL;
9785 elfsec_data->rela.hdr->sh_size = (sec->reloc_count
9786 * sizeof (Elf64_External_Rela));
9787 elfsec_data->rela.hdr->sh_entsize = sizeof (Elf64_External_Rela);
9788 sec->reloc_count = 0;
9789 }
9790 relocs += sec->reloc_count;
9791 sec->reloc_count += count;
9792 return relocs;
9793 }
9794
9795 static bfd_vma
9796 get_r2off (struct bfd_link_info *info,
9797 struct ppc_stub_hash_entry *stub_entry)
9798 {
9799 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9800 bfd_vma r2off = htab->stub_group[stub_entry->target_section->id].toc_off;
9801
9802 if (r2off == 0)
9803 {
9804 /* Support linking -R objects. Get the toc pointer from the
9805 opd entry. */
9806 char buf[8];
9807 asection *opd = stub_entry->h->elf.root.u.def.section;
9808 bfd_vma opd_off = stub_entry->h->elf.root.u.def.value;
9809
9810 if (strcmp (opd->name, ".opd") != 0
9811 || opd->reloc_count != 0)
9812 {
9813 info->callbacks->einfo (_("%P: cannot find opd entry toc for %s\n"),
9814 stub_entry->h->elf.root.root.string);
9815 bfd_set_error (bfd_error_bad_value);
9816 return 0;
9817 }
9818 if (!bfd_get_section_contents (opd->owner, opd, buf, opd_off + 8, 8))
9819 return 0;
9820 r2off = bfd_get_64 (opd->owner, buf);
9821 r2off -= elf_gp (info->output_bfd);
9822 }
9823 r2off -= htab->stub_group[stub_entry->id_sec->id].toc_off;
9824 return r2off;
9825 }
9826
9827 static bfd_boolean
9828 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
9829 {
9830 struct ppc_stub_hash_entry *stub_entry;
9831 struct ppc_branch_hash_entry *br_entry;
9832 struct bfd_link_info *info;
9833 struct ppc_link_hash_table *htab;
9834 bfd_byte *loc;
9835 bfd_byte *p;
9836 bfd_vma dest, off;
9837 int size;
9838 Elf_Internal_Rela *r;
9839 asection *plt;
9840
9841 /* Massage our args to the form they really have. */
9842 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
9843 info = in_arg;
9844
9845 htab = ppc_hash_table (info);
9846 if (htab == NULL)
9847 return FALSE;
9848
9849 /* Make a note of the offset within the stubs for this entry. */
9850 stub_entry->stub_offset = stub_entry->stub_sec->size;
9851 loc = stub_entry->stub_sec->contents + stub_entry->stub_offset;
9852
9853 htab->stub_count[stub_entry->stub_type - 1] += 1;
9854 switch (stub_entry->stub_type)
9855 {
9856 case ppc_stub_long_branch:
9857 case ppc_stub_long_branch_r2off:
9858 /* Branches are relative. This is where we are going to. */
9859 off = dest = (stub_entry->target_value
9860 + stub_entry->target_section->output_offset
9861 + stub_entry->target_section->output_section->vma);
9862
9863 /* And this is where we are coming from. */
9864 off -= (stub_entry->stub_offset
9865 + stub_entry->stub_sec->output_offset
9866 + stub_entry->stub_sec->output_section->vma);
9867
9868 size = 4;
9869 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
9870 {
9871 bfd_vma r2off = get_r2off (info, stub_entry);
9872
9873 if (r2off == 0)
9874 {
9875 htab->stub_error = TRUE;
9876 return FALSE;
9877 }
9878 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
9879 loc += 4;
9880 size = 12;
9881 if (PPC_HA (r2off) != 0)
9882 {
9883 size = 16;
9884 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
9885 loc += 4;
9886 }
9887 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
9888 loc += 4;
9889 off -= size - 4;
9890 }
9891 bfd_put_32 (htab->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
9892
9893 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
9894 {
9895 info->callbacks->einfo (_("%P: long branch stub `%s' offset overflow\n"),
9896 stub_entry->root.string);
9897 htab->stub_error = TRUE;
9898 return FALSE;
9899 }
9900
9901 if (info->emitrelocations)
9902 {
9903 r = get_relocs (stub_entry->stub_sec, 1);
9904 if (r == NULL)
9905 return FALSE;
9906 r->r_offset = loc - stub_entry->stub_sec->contents;
9907 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
9908 r->r_addend = dest;
9909 if (stub_entry->h != NULL)
9910 {
9911 struct elf_link_hash_entry **hashes;
9912 unsigned long symndx;
9913 struct ppc_link_hash_entry *h;
9914
9915 hashes = elf_sym_hashes (htab->stub_bfd);
9916 if (hashes == NULL)
9917 {
9918 bfd_size_type hsize;
9919
9920 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
9921 hashes = bfd_zalloc (htab->stub_bfd, hsize);
9922 if (hashes == NULL)
9923 return FALSE;
9924 elf_sym_hashes (htab->stub_bfd) = hashes;
9925 htab->stub_globals = 1;
9926 }
9927 symndx = htab->stub_globals++;
9928 h = stub_entry->h;
9929 hashes[symndx] = &h->elf;
9930 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
9931 if (h->oh != NULL && h->oh->is_func)
9932 h = ppc_follow_link (h->oh);
9933 if (h->elf.root.u.def.section != stub_entry->target_section)
9934 /* H is an opd symbol. The addend must be zero. */
9935 r->r_addend = 0;
9936 else
9937 {
9938 off = (h->elf.root.u.def.value
9939 + h->elf.root.u.def.section->output_offset
9940 + h->elf.root.u.def.section->output_section->vma);
9941 r->r_addend -= off;
9942 }
9943 }
9944 }
9945 break;
9946
9947 case ppc_stub_plt_branch:
9948 case ppc_stub_plt_branch_r2off:
9949 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
9950 stub_entry->root.string + 9,
9951 FALSE, FALSE);
9952 if (br_entry == NULL)
9953 {
9954 info->callbacks->einfo (_("%P: can't find branch stub `%s'\n"),
9955 stub_entry->root.string);
9956 htab->stub_error = TRUE;
9957 return FALSE;
9958 }
9959
9960 dest = (stub_entry->target_value
9961 + stub_entry->target_section->output_offset
9962 + stub_entry->target_section->output_section->vma);
9963
9964 bfd_put_64 (htab->brlt->owner, dest,
9965 htab->brlt->contents + br_entry->offset);
9966
9967 if (br_entry->iter == htab->stub_iteration)
9968 {
9969 br_entry->iter = 0;
9970
9971 if (htab->relbrlt != NULL)
9972 {
9973 /* Create a reloc for the branch lookup table entry. */
9974 Elf_Internal_Rela rela;
9975 bfd_byte *rl;
9976
9977 rela.r_offset = (br_entry->offset
9978 + htab->brlt->output_offset
9979 + htab->brlt->output_section->vma);
9980 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
9981 rela.r_addend = dest;
9982
9983 rl = htab->relbrlt->contents;
9984 rl += (htab->relbrlt->reloc_count++
9985 * sizeof (Elf64_External_Rela));
9986 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
9987 }
9988 else if (info->emitrelocations)
9989 {
9990 r = get_relocs (htab->brlt, 1);
9991 if (r == NULL)
9992 return FALSE;
9993 /* brlt, being SEC_LINKER_CREATED does not go through the
9994 normal reloc processing. Symbols and offsets are not
9995 translated from input file to output file form, so
9996 set up the offset per the output file. */
9997 r->r_offset = (br_entry->offset
9998 + htab->brlt->output_offset
9999 + htab->brlt->output_section->vma);
10000 r->r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
10001 r->r_addend = dest;
10002 }
10003 }
10004
10005 dest = (br_entry->offset
10006 + htab->brlt->output_offset
10007 + htab->brlt->output_section->vma);
10008
10009 off = (dest
10010 - elf_gp (htab->brlt->output_section->owner)
10011 - htab->stub_group[stub_entry->id_sec->id].toc_off);
10012
10013 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
10014 {
10015 info->callbacks->einfo
10016 (_("%P: linkage table error against `%s'\n"),
10017 stub_entry->root.string);
10018 bfd_set_error (bfd_error_bad_value);
10019 htab->stub_error = TRUE;
10020 return FALSE;
10021 }
10022
10023 if (info->emitrelocations)
10024 {
10025 r = get_relocs (stub_entry->stub_sec, 1 + (PPC_HA (off) != 0));
10026 if (r == NULL)
10027 return FALSE;
10028 r[0].r_offset = loc - stub_entry->stub_sec->contents;
10029 if (bfd_big_endian (info->output_bfd))
10030 r[0].r_offset += 2;
10031 if (stub_entry->stub_type == ppc_stub_plt_branch_r2off)
10032 r[0].r_offset += 4;
10033 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10034 r[0].r_addend = dest;
10035 if (PPC_HA (off) != 0)
10036 {
10037 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
10038 r[1].r_offset = r[0].r_offset + 4;
10039 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10040 r[1].r_addend = r[0].r_addend;
10041 }
10042 }
10043
10044 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
10045 {
10046 if (PPC_HA (off) != 0)
10047 {
10048 size = 16;
10049 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (off), loc);
10050 loc += 4;
10051 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (off), loc);
10052 }
10053 else
10054 {
10055 size = 12;
10056 bfd_put_32 (htab->stub_bfd, LD_R11_0R2 | PPC_LO (off), loc);
10057 }
10058 }
10059 else
10060 {
10061 bfd_vma r2off = get_r2off (info, stub_entry);
10062
10063 if (r2off == 0)
10064 {
10065 htab->stub_error = TRUE;
10066 return FALSE;
10067 }
10068
10069 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
10070 loc += 4;
10071 size = 20;
10072 if (PPC_HA (off) != 0)
10073 {
10074 size += 4;
10075 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (off), loc);
10076 loc += 4;
10077 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (off), loc);
10078 loc += 4;
10079 }
10080 else
10081 {
10082 bfd_put_32 (htab->stub_bfd, LD_R11_0R2 | PPC_LO (off), loc);
10083 loc += 4;
10084 }
10085
10086 if (PPC_HA (r2off) != 0)
10087 {
10088 size += 4;
10089 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
10090 loc += 4;
10091 }
10092 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
10093 }
10094 loc += 4;
10095 bfd_put_32 (htab->stub_bfd, MTCTR_R11, loc);
10096 loc += 4;
10097 bfd_put_32 (htab->stub_bfd, BCTR, loc);
10098 break;
10099
10100 case ppc_stub_plt_call:
10101 case ppc_stub_plt_call_r2save:
10102 if (stub_entry->h != NULL
10103 && stub_entry->h->is_func_descriptor
10104 && stub_entry->h->oh != NULL)
10105 {
10106 struct ppc_link_hash_entry *fh = ppc_follow_link (stub_entry->h->oh);
10107
10108 /* If the old-ABI "dot-symbol" is undefined make it weak so
10109 we don't get a link error from RELOC_FOR_GLOBAL_SYMBOL.
10110 FIXME: We used to define the symbol on one of the call
10111 stubs instead, which is why we test symbol section id
10112 against htab->top_id in various places. Likely all
10113 these checks could now disappear. */
10114 if (fh->elf.root.type == bfd_link_hash_undefined)
10115 fh->elf.root.type = bfd_link_hash_undefweak;
10116 /* Stop undo_symbol_twiddle changing it back to undefined. */
10117 fh->was_undefined = 0;
10118 }
10119
10120 /* Now build the stub. */
10121 dest = stub_entry->plt_ent->plt.offset & ~1;
10122 if (dest >= (bfd_vma) -2)
10123 abort ();
10124
10125 plt = htab->plt;
10126 if (!htab->elf.dynamic_sections_created
10127 || stub_entry->h == NULL
10128 || stub_entry->h->elf.dynindx == -1)
10129 plt = htab->iplt;
10130
10131 dest += plt->output_offset + plt->output_section->vma;
10132
10133 if (stub_entry->h == NULL
10134 && (stub_entry->plt_ent->plt.offset & 1) == 0)
10135 {
10136 Elf_Internal_Rela rela;
10137 bfd_byte *rl;
10138
10139 rela.r_offset = dest;
10140 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
10141 rela.r_addend = (stub_entry->target_value
10142 + stub_entry->target_section->output_offset
10143 + stub_entry->target_section->output_section->vma);
10144
10145 rl = (htab->reliplt->contents
10146 + (htab->reliplt->reloc_count++
10147 * sizeof (Elf64_External_Rela)));
10148 bfd_elf64_swap_reloca_out (info->output_bfd, &rela, rl);
10149 stub_entry->plt_ent->plt.offset |= 1;
10150 }
10151
10152 off = (dest
10153 - elf_gp (plt->output_section->owner)
10154 - htab->stub_group[stub_entry->id_sec->id].toc_off);
10155
10156 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
10157 {
10158 info->callbacks->einfo
10159 (_("%P: linkage table error against `%s'\n"),
10160 stub_entry->h != NULL
10161 ? stub_entry->h->elf.root.root.string
10162 : "<local sym>");
10163 bfd_set_error (bfd_error_bad_value);
10164 htab->stub_error = TRUE;
10165 return FALSE;
10166 }
10167
10168 if (htab->plt_stub_align != 0)
10169 {
10170 unsigned pad = plt_stub_pad (htab, stub_entry, off);
10171
10172 stub_entry->stub_sec->size += pad;
10173 stub_entry->stub_offset = stub_entry->stub_sec->size;
10174 loc += pad;
10175 }
10176
10177 r = NULL;
10178 if (info->emitrelocations)
10179 {
10180 r = get_relocs (stub_entry->stub_sec,
10181 (2
10182 + (PPC_HA (off) != 0)
10183 + (htab->plt_static_chain
10184 && PPC_HA (off + 16) == PPC_HA (off))));
10185 if (r == NULL)
10186 return FALSE;
10187 r[0].r_offset = loc - stub_entry->stub_sec->contents;
10188 if (bfd_big_endian (info->output_bfd))
10189 r[0].r_offset += 2;
10190 r[0].r_addend = dest;
10191 }
10192 if (stub_entry->h != NULL
10193 && (stub_entry->h == htab->tls_get_addr_fd
10194 || stub_entry->h == htab->tls_get_addr)
10195 && !htab->no_tls_get_addr_opt)
10196 p = build_tls_get_addr_stub (htab, stub_entry, loc, off, r);
10197 else
10198 p = build_plt_stub (htab, stub_entry, loc, off, r);
10199 size = p - loc;
10200 break;
10201
10202 default:
10203 BFD_FAIL ();
10204 return FALSE;
10205 }
10206
10207 stub_entry->stub_sec->size += size;
10208
10209 if (htab->emit_stub_syms)
10210 {
10211 struct elf_link_hash_entry *h;
10212 size_t len1, len2;
10213 char *name;
10214 const char *const stub_str[] = { "long_branch",
10215 "long_branch_r2off",
10216 "plt_branch",
10217 "plt_branch_r2off",
10218 "plt_call",
10219 "plt_call" };
10220
10221 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
10222 len2 = strlen (stub_entry->root.string);
10223 name = bfd_malloc (len1 + len2 + 2);
10224 if (name == NULL)
10225 return FALSE;
10226 memcpy (name, stub_entry->root.string, 9);
10227 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
10228 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
10229 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
10230 if (h == NULL)
10231 return FALSE;
10232 if (h->root.type == bfd_link_hash_new)
10233 {
10234 h->root.type = bfd_link_hash_defined;
10235 h->root.u.def.section = stub_entry->stub_sec;
10236 h->root.u.def.value = stub_entry->stub_offset;
10237 h->ref_regular = 1;
10238 h->def_regular = 1;
10239 h->ref_regular_nonweak = 1;
10240 h->forced_local = 1;
10241 h->non_elf = 0;
10242 }
10243 }
10244
10245 return TRUE;
10246 }
10247
10248 /* As above, but don't actually build the stub. Just bump offset so
10249 we know stub section sizes, and select plt_branch stubs where
10250 long_branch stubs won't do. */
10251
10252 static bfd_boolean
10253 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
10254 {
10255 struct ppc_stub_hash_entry *stub_entry;
10256 struct bfd_link_info *info;
10257 struct ppc_link_hash_table *htab;
10258 bfd_vma off;
10259 int size;
10260
10261 /* Massage our args to the form they really have. */
10262 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
10263 info = in_arg;
10264
10265 htab = ppc_hash_table (info);
10266 if (htab == NULL)
10267 return FALSE;
10268
10269 if (stub_entry->stub_type == ppc_stub_plt_call
10270 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10271 {
10272 asection *plt;
10273 off = stub_entry->plt_ent->plt.offset & ~(bfd_vma) 1;
10274 if (off >= (bfd_vma) -2)
10275 abort ();
10276 plt = htab->plt;
10277 if (!htab->elf.dynamic_sections_created
10278 || stub_entry->h == NULL
10279 || stub_entry->h->elf.dynindx == -1)
10280 plt = htab->iplt;
10281 off += (plt->output_offset
10282 + plt->output_section->vma
10283 - elf_gp (plt->output_section->owner)
10284 - htab->stub_group[stub_entry->id_sec->id].toc_off);
10285
10286 size = plt_stub_size (htab, stub_entry, off);
10287 if (htab->plt_stub_align)
10288 size += plt_stub_pad (htab, stub_entry, off);
10289 if (info->emitrelocations)
10290 {
10291 stub_entry->stub_sec->reloc_count
10292 += (2
10293 + (PPC_HA (off) != 0)
10294 + (htab->plt_static_chain
10295 && PPC_HA (off + 16) == PPC_HA (off)));
10296 stub_entry->stub_sec->flags |= SEC_RELOC;
10297 }
10298 }
10299 else
10300 {
10301 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
10302 variants. */
10303 bfd_vma r2off = 0;
10304
10305 off = (stub_entry->target_value
10306 + stub_entry->target_section->output_offset
10307 + stub_entry->target_section->output_section->vma);
10308 off -= (stub_entry->stub_sec->size
10309 + stub_entry->stub_sec->output_offset
10310 + stub_entry->stub_sec->output_section->vma);
10311
10312 /* Reset the stub type from the plt variant in case we now
10313 can reach with a shorter stub. */
10314 if (stub_entry->stub_type >= ppc_stub_plt_branch)
10315 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
10316
10317 size = 4;
10318 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
10319 {
10320 r2off = get_r2off (info, stub_entry);
10321 if (r2off == 0)
10322 {
10323 htab->stub_error = TRUE;
10324 return FALSE;
10325 }
10326 size = 12;
10327 if (PPC_HA (r2off) != 0)
10328 size = 16;
10329 off -= size - 4;
10330 }
10331
10332 /* If the branch offset if too big, use a ppc_stub_plt_branch. */
10333 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
10334 {
10335 struct ppc_branch_hash_entry *br_entry;
10336
10337 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
10338 stub_entry->root.string + 9,
10339 TRUE, FALSE);
10340 if (br_entry == NULL)
10341 {
10342 info->callbacks->einfo (_("%P: can't build branch stub `%s'\n"),
10343 stub_entry->root.string);
10344 htab->stub_error = TRUE;
10345 return FALSE;
10346 }
10347
10348 if (br_entry->iter != htab->stub_iteration)
10349 {
10350 br_entry->iter = htab->stub_iteration;
10351 br_entry->offset = htab->brlt->size;
10352 htab->brlt->size += 8;
10353
10354 if (htab->relbrlt != NULL)
10355 htab->relbrlt->size += sizeof (Elf64_External_Rela);
10356 else if (info->emitrelocations)
10357 {
10358 htab->brlt->reloc_count += 1;
10359 htab->brlt->flags |= SEC_RELOC;
10360 }
10361 }
10362
10363 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
10364 off = (br_entry->offset
10365 + htab->brlt->output_offset
10366 + htab->brlt->output_section->vma
10367 - elf_gp (htab->brlt->output_section->owner)
10368 - htab->stub_group[stub_entry->id_sec->id].toc_off);
10369
10370 if (info->emitrelocations)
10371 {
10372 stub_entry->stub_sec->reloc_count += 1 + (PPC_HA (off) != 0);
10373 stub_entry->stub_sec->flags |= SEC_RELOC;
10374 }
10375
10376 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
10377 {
10378 size = 12;
10379 if (PPC_HA (off) != 0)
10380 size = 16;
10381 }
10382 else
10383 {
10384 size = 20;
10385 if (PPC_HA (off) != 0)
10386 size += 4;
10387
10388 if (PPC_HA (r2off) != 0)
10389 size += 4;
10390 }
10391 }
10392 else if (info->emitrelocations)
10393 {
10394 stub_entry->stub_sec->reloc_count += 1;
10395 stub_entry->stub_sec->flags |= SEC_RELOC;
10396 }
10397 }
10398
10399 stub_entry->stub_sec->size += size;
10400 return TRUE;
10401 }
10402
10403 /* Set up various things so that we can make a list of input sections
10404 for each output section included in the link. Returns -1 on error,
10405 0 when no stubs will be needed, and 1 on success. */
10406
10407 int
10408 ppc64_elf_setup_section_lists
10409 (struct bfd_link_info *info,
10410 asection *(*add_stub_section) (const char *, asection *),
10411 void (*layout_sections_again) (void))
10412 {
10413 bfd *input_bfd;
10414 int top_id, top_index, id;
10415 asection *section;
10416 asection **input_list;
10417 bfd_size_type amt;
10418 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10419
10420 if (htab == NULL)
10421 return -1;
10422 /* Stash our params away. */
10423 htab->add_stub_section = add_stub_section;
10424 htab->layout_sections_again = layout_sections_again;
10425
10426 if (htab->brlt == NULL)
10427 return 0;
10428
10429 /* Find the top input section id. */
10430 for (input_bfd = info->input_bfds, top_id = 3;
10431 input_bfd != NULL;
10432 input_bfd = input_bfd->link_next)
10433 {
10434 for (section = input_bfd->sections;
10435 section != NULL;
10436 section = section->next)
10437 {
10438 if (top_id < section->id)
10439 top_id = section->id;
10440 }
10441 }
10442
10443 htab->top_id = top_id;
10444 amt = sizeof (struct map_stub) * (top_id + 1);
10445 htab->stub_group = bfd_zmalloc (amt);
10446 if (htab->stub_group == NULL)
10447 return -1;
10448
10449 /* Set toc_off for com, und, abs and ind sections. */
10450 for (id = 0; id < 3; id++)
10451 htab->stub_group[id].toc_off = TOC_BASE_OFF;
10452
10453 /* We can't use output_bfd->section_count here to find the top output
10454 section index as some sections may have been removed, and
10455 strip_excluded_output_sections doesn't renumber the indices. */
10456 for (section = info->output_bfd->sections, top_index = 0;
10457 section != NULL;
10458 section = section->next)
10459 {
10460 if (top_index < section->index)
10461 top_index = section->index;
10462 }
10463
10464 htab->top_index = top_index;
10465 amt = sizeof (asection *) * (top_index + 1);
10466 input_list = bfd_zmalloc (amt);
10467 htab->input_list = input_list;
10468 if (input_list == NULL)
10469 return -1;
10470
10471 return 1;
10472 }
10473
10474 /* Set up for first pass at multitoc partitioning. */
10475
10476 void
10477 ppc64_elf_start_multitoc_partition (struct bfd_link_info *info)
10478 {
10479 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10480
10481 elf_gp (info->output_bfd) = ppc64_elf_toc (info->output_bfd);
10482 htab->toc_curr = elf_gp (info->output_bfd);
10483 htab->toc_bfd = NULL;
10484 htab->toc_first_sec = NULL;
10485 }
10486
10487 /* The linker repeatedly calls this function for each TOC input section
10488 and linker generated GOT section. Group input bfds such that the toc
10489 within a group is less than 64k in size. */
10490
10491 bfd_boolean
10492 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
10493 {
10494 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10495 bfd_vma addr, off, limit;
10496
10497 if (htab == NULL)
10498 return FALSE;
10499
10500 if (!htab->second_toc_pass)
10501 {
10502 /* Keep track of the first .toc or .got section for this input bfd. */
10503 if (htab->toc_bfd != isec->owner)
10504 {
10505 htab->toc_bfd = isec->owner;
10506 htab->toc_first_sec = isec;
10507 }
10508
10509 addr = isec->output_offset + isec->output_section->vma;
10510 off = addr - htab->toc_curr;
10511 limit = 0x80008000;
10512 if (ppc64_elf_tdata (isec->owner)->has_small_toc_reloc)
10513 limit = 0x10000;
10514 if (off + isec->size > limit)
10515 {
10516 addr = (htab->toc_first_sec->output_offset
10517 + htab->toc_first_sec->output_section->vma);
10518 htab->toc_curr = addr;
10519 }
10520
10521 /* toc_curr is the base address of this toc group. Set elf_gp
10522 for the input section to be the offset relative to the
10523 output toc base plus 0x8000. Making the input elf_gp an
10524 offset allows us to move the toc as a whole without
10525 recalculating input elf_gp. */
10526 off = htab->toc_curr - elf_gp (isec->output_section->owner);
10527 off += TOC_BASE_OFF;
10528
10529 /* Die if someone uses a linker script that doesn't keep input
10530 file .toc and .got together. */
10531 if (elf_gp (isec->owner) != 0
10532 && elf_gp (isec->owner) != off)
10533 return FALSE;
10534
10535 elf_gp (isec->owner) = off;
10536 return TRUE;
10537 }
10538
10539 /* During the second pass toc_first_sec points to the start of
10540 a toc group, and toc_curr is used to track the old elf_gp.
10541 We use toc_bfd to ensure we only look at each bfd once. */
10542 if (htab->toc_bfd == isec->owner)
10543 return TRUE;
10544 htab->toc_bfd = isec->owner;
10545
10546 if (htab->toc_first_sec == NULL
10547 || htab->toc_curr != elf_gp (isec->owner))
10548 {
10549 htab->toc_curr = elf_gp (isec->owner);
10550 htab->toc_first_sec = isec;
10551 }
10552 addr = (htab->toc_first_sec->output_offset
10553 + htab->toc_first_sec->output_section->vma);
10554 off = addr - elf_gp (isec->output_section->owner) + TOC_BASE_OFF;
10555 elf_gp (isec->owner) = off;
10556
10557 return TRUE;
10558 }
10559
10560 /* Called via elf_link_hash_traverse to merge GOT entries for global
10561 symbol H. */
10562
10563 static bfd_boolean
10564 merge_global_got (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
10565 {
10566 if (h->root.type == bfd_link_hash_indirect)
10567 return TRUE;
10568
10569 merge_got_entries (&h->got.glist);
10570
10571 return TRUE;
10572 }
10573
10574 /* Called via elf_link_hash_traverse to allocate GOT entries for global
10575 symbol H. */
10576
10577 static bfd_boolean
10578 reallocate_got (struct elf_link_hash_entry *h, void *inf)
10579 {
10580 struct got_entry *gent;
10581
10582 if (h->root.type == bfd_link_hash_indirect)
10583 return TRUE;
10584
10585 for (gent = h->got.glist; gent != NULL; gent = gent->next)
10586 if (!gent->is_indirect)
10587 allocate_got (h, (struct bfd_link_info *) inf, gent);
10588 return TRUE;
10589 }
10590
10591 /* Called on the first multitoc pass after the last call to
10592 ppc64_elf_next_toc_section. This function removes duplicate GOT
10593 entries. */
10594
10595 bfd_boolean
10596 ppc64_elf_layout_multitoc (struct bfd_link_info *info)
10597 {
10598 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10599 struct bfd *ibfd, *ibfd2;
10600 bfd_boolean done_something;
10601
10602 htab->multi_toc_needed = htab->toc_curr != elf_gp (info->output_bfd);
10603
10604 if (!htab->do_multi_toc)
10605 return FALSE;
10606
10607 /* Merge global sym got entries within a toc group. */
10608 elf_link_hash_traverse (&htab->elf, merge_global_got, info);
10609
10610 /* And tlsld_got. */
10611 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10612 {
10613 struct got_entry *ent, *ent2;
10614
10615 if (!is_ppc64_elf (ibfd))
10616 continue;
10617
10618 ent = ppc64_tlsld_got (ibfd);
10619 if (!ent->is_indirect
10620 && ent->got.offset != (bfd_vma) -1)
10621 {
10622 for (ibfd2 = ibfd->link_next; ibfd2 != NULL; ibfd2 = ibfd2->link_next)
10623 {
10624 if (!is_ppc64_elf (ibfd2))
10625 continue;
10626
10627 ent2 = ppc64_tlsld_got (ibfd2);
10628 if (!ent2->is_indirect
10629 && ent2->got.offset != (bfd_vma) -1
10630 && elf_gp (ibfd2) == elf_gp (ibfd))
10631 {
10632 ent2->is_indirect = TRUE;
10633 ent2->got.ent = ent;
10634 }
10635 }
10636 }
10637 }
10638
10639 /* Zap sizes of got sections. */
10640 htab->reliplt->rawsize = htab->reliplt->size;
10641 htab->reliplt->size -= htab->got_reli_size;
10642 htab->got_reli_size = 0;
10643
10644 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10645 {
10646 asection *got, *relgot;
10647
10648 if (!is_ppc64_elf (ibfd))
10649 continue;
10650
10651 got = ppc64_elf_tdata (ibfd)->got;
10652 if (got != NULL)
10653 {
10654 got->rawsize = got->size;
10655 got->size = 0;
10656 relgot = ppc64_elf_tdata (ibfd)->relgot;
10657 relgot->rawsize = relgot->size;
10658 relgot->size = 0;
10659 }
10660 }
10661
10662 /* Now reallocate the got, local syms first. We don't need to
10663 allocate section contents again since we never increase size. */
10664 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10665 {
10666 struct got_entry **lgot_ents;
10667 struct got_entry **end_lgot_ents;
10668 struct plt_entry **local_plt;
10669 struct plt_entry **end_local_plt;
10670 unsigned char *lgot_masks;
10671 bfd_size_type locsymcount;
10672 Elf_Internal_Shdr *symtab_hdr;
10673 asection *s, *srel;
10674
10675 if (!is_ppc64_elf (ibfd))
10676 continue;
10677
10678 lgot_ents = elf_local_got_ents (ibfd);
10679 if (!lgot_ents)
10680 continue;
10681
10682 symtab_hdr = &elf_symtab_hdr (ibfd);
10683 locsymcount = symtab_hdr->sh_info;
10684 end_lgot_ents = lgot_ents + locsymcount;
10685 local_plt = (struct plt_entry **) end_lgot_ents;
10686 end_local_plt = local_plt + locsymcount;
10687 lgot_masks = (unsigned char *) end_local_plt;
10688 s = ppc64_elf_tdata (ibfd)->got;
10689 srel = ppc64_elf_tdata (ibfd)->relgot;
10690 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
10691 {
10692 struct got_entry *ent;
10693
10694 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
10695 {
10696 unsigned int num = 1;
10697 ent->got.offset = s->size;
10698 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
10699 num = 2;
10700 s->size += num * 8;
10701 if (info->shared)
10702 srel->size += num * sizeof (Elf64_External_Rela);
10703 else if ((*lgot_masks & PLT_IFUNC) != 0)
10704 {
10705 htab->reliplt->size
10706 += num * sizeof (Elf64_External_Rela);
10707 htab->got_reli_size
10708 += num * sizeof (Elf64_External_Rela);
10709 }
10710 }
10711 }
10712 }
10713
10714 elf_link_hash_traverse (&htab->elf, reallocate_got, info);
10715
10716 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10717 {
10718 struct got_entry *ent;
10719
10720 if (!is_ppc64_elf (ibfd))
10721 continue;
10722
10723 ent = ppc64_tlsld_got (ibfd);
10724 if (!ent->is_indirect
10725 && ent->got.offset != (bfd_vma) -1)
10726 {
10727 asection *s = ppc64_elf_tdata (ibfd)->got;
10728 ent->got.offset = s->size;
10729 s->size += 16;
10730 if (info->shared)
10731 {
10732 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
10733 srel->size += sizeof (Elf64_External_Rela);
10734 }
10735 }
10736 }
10737
10738 done_something = htab->reliplt->rawsize != htab->reliplt->size;
10739 if (!done_something)
10740 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10741 {
10742 asection *got;
10743
10744 if (!is_ppc64_elf (ibfd))
10745 continue;
10746
10747 got = ppc64_elf_tdata (ibfd)->got;
10748 if (got != NULL)
10749 {
10750 done_something = got->rawsize != got->size;
10751 if (done_something)
10752 break;
10753 }
10754 }
10755
10756 if (done_something)
10757 (*htab->layout_sections_again) ();
10758
10759 /* Set up for second pass over toc sections to recalculate elf_gp
10760 on input sections. */
10761 htab->toc_bfd = NULL;
10762 htab->toc_first_sec = NULL;
10763 htab->second_toc_pass = TRUE;
10764 return done_something;
10765 }
10766
10767 /* Called after second pass of multitoc partitioning. */
10768
10769 void
10770 ppc64_elf_finish_multitoc_partition (struct bfd_link_info *info)
10771 {
10772 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10773
10774 /* After the second pass, toc_curr tracks the TOC offset used
10775 for code sections below in ppc64_elf_next_input_section. */
10776 htab->toc_curr = TOC_BASE_OFF;
10777 }
10778
10779 /* No toc references were found in ISEC. If the code in ISEC makes no
10780 calls, then there's no need to use toc adjusting stubs when branching
10781 into ISEC. Actually, indirect calls from ISEC are OK as they will
10782 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
10783 needed, and 2 if a cyclical call-graph was found but no other reason
10784 for a stub was detected. If called from the top level, a return of
10785 2 means the same as a return of 0. */
10786
10787 static int
10788 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
10789 {
10790 int ret;
10791
10792 /* Mark this section as checked. */
10793 isec->call_check_done = 1;
10794
10795 /* We know none of our code bearing sections will need toc stubs. */
10796 if ((isec->flags & SEC_LINKER_CREATED) != 0)
10797 return 0;
10798
10799 if (isec->size == 0)
10800 return 0;
10801
10802 if (isec->output_section == NULL)
10803 return 0;
10804
10805 ret = 0;
10806 if (isec->reloc_count != 0)
10807 {
10808 Elf_Internal_Rela *relstart, *rel;
10809 Elf_Internal_Sym *local_syms;
10810 struct ppc_link_hash_table *htab;
10811
10812 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
10813 info->keep_memory);
10814 if (relstart == NULL)
10815 return -1;
10816
10817 /* Look for branches to outside of this section. */
10818 local_syms = NULL;
10819 htab = ppc_hash_table (info);
10820 if (htab == NULL)
10821 return -1;
10822
10823 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
10824 {
10825 enum elf_ppc64_reloc_type r_type;
10826 unsigned long r_symndx;
10827 struct elf_link_hash_entry *h;
10828 struct ppc_link_hash_entry *eh;
10829 Elf_Internal_Sym *sym;
10830 asection *sym_sec;
10831 struct _opd_sec_data *opd;
10832 bfd_vma sym_value;
10833 bfd_vma dest;
10834
10835 r_type = ELF64_R_TYPE (rel->r_info);
10836 if (r_type != R_PPC64_REL24
10837 && r_type != R_PPC64_REL14
10838 && r_type != R_PPC64_REL14_BRTAKEN
10839 && r_type != R_PPC64_REL14_BRNTAKEN)
10840 continue;
10841
10842 r_symndx = ELF64_R_SYM (rel->r_info);
10843 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
10844 isec->owner))
10845 {
10846 ret = -1;
10847 break;
10848 }
10849
10850 /* Calls to dynamic lib functions go through a plt call stub
10851 that uses r2. */
10852 eh = (struct ppc_link_hash_entry *) h;
10853 if (eh != NULL
10854 && (eh->elf.plt.plist != NULL
10855 || (eh->oh != NULL
10856 && ppc_follow_link (eh->oh)->elf.plt.plist != NULL)))
10857 {
10858 ret = 1;
10859 break;
10860 }
10861
10862 if (sym_sec == NULL)
10863 /* Ignore other undefined symbols. */
10864 continue;
10865
10866 /* Assume branches to other sections not included in the
10867 link need stubs too, to cover -R and absolute syms. */
10868 if (sym_sec->output_section == NULL)
10869 {
10870 ret = 1;
10871 break;
10872 }
10873
10874 if (h == NULL)
10875 sym_value = sym->st_value;
10876 else
10877 {
10878 if (h->root.type != bfd_link_hash_defined
10879 && h->root.type != bfd_link_hash_defweak)
10880 abort ();
10881 sym_value = h->root.u.def.value;
10882 }
10883 sym_value += rel->r_addend;
10884
10885 /* If this branch reloc uses an opd sym, find the code section. */
10886 opd = get_opd_info (sym_sec);
10887 if (opd != NULL)
10888 {
10889 if (h == NULL && opd->adjust != NULL)
10890 {
10891 long adjust;
10892
10893 adjust = opd->adjust[sym->st_value / 8];
10894 if (adjust == -1)
10895 /* Assume deleted functions won't ever be called. */
10896 continue;
10897 sym_value += adjust;
10898 }
10899
10900 dest = opd_entry_value (sym_sec, sym_value, &sym_sec, NULL);
10901 if (dest == (bfd_vma) -1)
10902 continue;
10903 }
10904 else
10905 dest = (sym_value
10906 + sym_sec->output_offset
10907 + sym_sec->output_section->vma);
10908
10909 /* Ignore branch to self. */
10910 if (sym_sec == isec)
10911 continue;
10912
10913 /* If the called function uses the toc, we need a stub. */
10914 if (sym_sec->has_toc_reloc
10915 || sym_sec->makes_toc_func_call)
10916 {
10917 ret = 1;
10918 break;
10919 }
10920
10921 /* Assume any branch that needs a long branch stub might in fact
10922 need a plt_branch stub. A plt_branch stub uses r2. */
10923 else if (dest - (isec->output_offset
10924 + isec->output_section->vma
10925 + rel->r_offset) + (1 << 25) >= (2 << 25))
10926 {
10927 ret = 1;
10928 break;
10929 }
10930
10931 /* If calling back to a section in the process of being
10932 tested, we can't say for sure that no toc adjusting stubs
10933 are needed, so don't return zero. */
10934 else if (sym_sec->call_check_in_progress)
10935 ret = 2;
10936
10937 /* Branches to another section that itself doesn't have any TOC
10938 references are OK. Recursively call ourselves to check. */
10939 else if (!sym_sec->call_check_done)
10940 {
10941 int recur;
10942
10943 /* Mark current section as indeterminate, so that other
10944 sections that call back to current won't be marked as
10945 known. */
10946 isec->call_check_in_progress = 1;
10947 recur = toc_adjusting_stub_needed (info, sym_sec);
10948 isec->call_check_in_progress = 0;
10949
10950 if (recur != 0)
10951 {
10952 ret = recur;
10953 if (recur != 2)
10954 break;
10955 }
10956 }
10957 }
10958
10959 if (local_syms != NULL
10960 && (elf_symtab_hdr (isec->owner).contents
10961 != (unsigned char *) local_syms))
10962 free (local_syms);
10963 if (elf_section_data (isec)->relocs != relstart)
10964 free (relstart);
10965 }
10966
10967 if ((ret & 1) == 0
10968 && isec->map_head.s != NULL
10969 && (strcmp (isec->output_section->name, ".init") == 0
10970 || strcmp (isec->output_section->name, ".fini") == 0))
10971 {
10972 if (isec->map_head.s->has_toc_reloc
10973 || isec->map_head.s->makes_toc_func_call)
10974 ret = 1;
10975 else if (!isec->map_head.s->call_check_done)
10976 {
10977 int recur;
10978 isec->call_check_in_progress = 1;
10979 recur = toc_adjusting_stub_needed (info, isec->map_head.s);
10980 isec->call_check_in_progress = 0;
10981 if (recur != 0)
10982 ret = recur;
10983 }
10984 }
10985
10986 if (ret == 1)
10987 isec->makes_toc_func_call = 1;
10988
10989 return ret;
10990 }
10991
10992 /* The linker repeatedly calls this function for each input section,
10993 in the order that input sections are linked into output sections.
10994 Build lists of input sections to determine groupings between which
10995 we may insert linker stubs. */
10996
10997 bfd_boolean
10998 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
10999 {
11000 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11001
11002 if (htab == NULL)
11003 return FALSE;
11004
11005 if ((isec->output_section->flags & SEC_CODE) != 0
11006 && isec->output_section->index <= htab->top_index)
11007 {
11008 asection **list = htab->input_list + isec->output_section->index;
11009 /* Steal the link_sec pointer for our list. */
11010 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
11011 /* This happens to make the list in reverse order,
11012 which is what we want. */
11013 PREV_SEC (isec) = *list;
11014 *list = isec;
11015 }
11016
11017 if (htab->multi_toc_needed)
11018 {
11019 /* If a code section has a function that uses the TOC then we need
11020 to use the right TOC (obviously). Also, make sure that .opd gets
11021 the correct TOC value for R_PPC64_TOC relocs that don't have or
11022 can't find their function symbol (shouldn't ever happen now).
11023 Also specially treat .fixup for the linux kernel. .fixup
11024 contains branches, but only back to the function that hit an
11025 exception. */
11026 if (isec->has_toc_reloc
11027 || (isec->flags & SEC_CODE) == 0
11028 || strcmp (isec->name, ".fixup") == 0)
11029 {
11030 if (elf_gp (isec->owner) != 0)
11031 htab->toc_curr = elf_gp (isec->owner);
11032 }
11033 else
11034 {
11035 if (!isec->call_check_done
11036 && toc_adjusting_stub_needed (info, isec) < 0)
11037 return FALSE;
11038 /* If we make a local call from this section, ie. a branch
11039 without a following nop, then we have no place to put a
11040 toc restoring insn. We must use the same toc group as
11041 the callee.
11042 Testing makes_toc_func_call actually tests for *any*
11043 calls to functions that need a good toc pointer. A more
11044 precise test would be better, as this one will set
11045 incorrect values for pasted .init/.fini fragments.
11046 (Fixed later in check_pasted_section.) */
11047 if (isec->makes_toc_func_call
11048 && elf_gp (isec->owner) != 0)
11049 htab->toc_curr = elf_gp (isec->owner);
11050 }
11051 }
11052
11053 /* Functions that don't use the TOC can belong in any TOC group.
11054 Use the last TOC base. */
11055 htab->stub_group[isec->id].toc_off = htab->toc_curr;
11056 return TRUE;
11057 }
11058
11059 /* Check that all .init and .fini sections use the same toc, if they
11060 have toc relocs. */
11061
11062 static bfd_boolean
11063 check_pasted_section (struct bfd_link_info *info, const char *name)
11064 {
11065 asection *o = bfd_get_section_by_name (info->output_bfd, name);
11066
11067 if (o != NULL)
11068 {
11069 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11070 bfd_vma toc_off = 0;
11071 asection *i;
11072
11073 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
11074 if (i->has_toc_reloc)
11075 {
11076 if (toc_off == 0)
11077 toc_off = htab->stub_group[i->id].toc_off;
11078 else if (toc_off != htab->stub_group[i->id].toc_off)
11079 return FALSE;
11080 }
11081
11082 if (toc_off == 0)
11083 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
11084 if (i->makes_toc_func_call)
11085 {
11086 toc_off = htab->stub_group[i->id].toc_off;
11087 break;
11088 }
11089
11090 /* Make sure the whole pasted function uses the same toc offset. */
11091 if (toc_off != 0)
11092 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
11093 htab->stub_group[i->id].toc_off = toc_off;
11094 }
11095 return TRUE;
11096 }
11097
11098 bfd_boolean
11099 ppc64_elf_check_init_fini (struct bfd_link_info *info)
11100 {
11101 return (check_pasted_section (info, ".init")
11102 & check_pasted_section (info, ".fini"));
11103 }
11104
11105 /* See whether we can group stub sections together. Grouping stub
11106 sections may result in fewer stubs. More importantly, we need to
11107 put all .init* and .fini* stubs at the beginning of the .init or
11108 .fini output sections respectively, because glibc splits the
11109 _init and _fini functions into multiple parts. Putting a stub in
11110 the middle of a function is not a good idea. */
11111
11112 static void
11113 group_sections (struct ppc_link_hash_table *htab,
11114 bfd_size_type stub_group_size,
11115 bfd_boolean stubs_always_before_branch)
11116 {
11117 asection **list;
11118 bfd_size_type stub14_group_size;
11119 bfd_boolean suppress_size_errors;
11120
11121 suppress_size_errors = FALSE;
11122 stub14_group_size = stub_group_size;
11123 if (stub_group_size == 1)
11124 {
11125 /* Default values. */
11126 if (stubs_always_before_branch)
11127 {
11128 stub_group_size = 0x1e00000;
11129 stub14_group_size = 0x7800;
11130 }
11131 else
11132 {
11133 stub_group_size = 0x1c00000;
11134 stub14_group_size = 0x7000;
11135 }
11136 suppress_size_errors = TRUE;
11137 }
11138
11139 list = htab->input_list + htab->top_index;
11140 do
11141 {
11142 asection *tail = *list;
11143 while (tail != NULL)
11144 {
11145 asection *curr;
11146 asection *prev;
11147 bfd_size_type total;
11148 bfd_boolean big_sec;
11149 bfd_vma curr_toc;
11150
11151 curr = tail;
11152 total = tail->size;
11153 big_sec = total > (ppc64_elf_section_data (tail) != NULL
11154 && ppc64_elf_section_data (tail)->has_14bit_branch
11155 ? stub14_group_size : stub_group_size);
11156 if (big_sec && !suppress_size_errors)
11157 (*_bfd_error_handler) (_("%B section %A exceeds stub group size"),
11158 tail->owner, tail);
11159 curr_toc = htab->stub_group[tail->id].toc_off;
11160
11161 while ((prev = PREV_SEC (curr)) != NULL
11162 && ((total += curr->output_offset - prev->output_offset)
11163 < (ppc64_elf_section_data (prev) != NULL
11164 && ppc64_elf_section_data (prev)->has_14bit_branch
11165 ? stub14_group_size : stub_group_size))
11166 && htab->stub_group[prev->id].toc_off == curr_toc)
11167 curr = prev;
11168
11169 /* OK, the size from the start of CURR to the end is less
11170 than stub_group_size and thus can be handled by one stub
11171 section. (or the tail section is itself larger than
11172 stub_group_size, in which case we may be toast.) We
11173 should really be keeping track of the total size of stubs
11174 added here, as stubs contribute to the final output
11175 section size. That's a little tricky, and this way will
11176 only break if stubs added make the total size more than
11177 2^25, ie. for the default stub_group_size, if stubs total
11178 more than 2097152 bytes, or nearly 75000 plt call stubs. */
11179 do
11180 {
11181 prev = PREV_SEC (tail);
11182 /* Set up this stub group. */
11183 htab->stub_group[tail->id].link_sec = curr;
11184 }
11185 while (tail != curr && (tail = prev) != NULL);
11186
11187 /* But wait, there's more! Input sections up to stub_group_size
11188 bytes before the stub section can be handled by it too.
11189 Don't do this if we have a really large section after the
11190 stubs, as adding more stubs increases the chance that
11191 branches may not reach into the stub section. */
11192 if (!stubs_always_before_branch && !big_sec)
11193 {
11194 total = 0;
11195 while (prev != NULL
11196 && ((total += tail->output_offset - prev->output_offset)
11197 < (ppc64_elf_section_data (prev) != NULL
11198 && ppc64_elf_section_data (prev)->has_14bit_branch
11199 ? stub14_group_size : stub_group_size))
11200 && htab->stub_group[prev->id].toc_off == curr_toc)
11201 {
11202 tail = prev;
11203 prev = PREV_SEC (tail);
11204 htab->stub_group[tail->id].link_sec = curr;
11205 }
11206 }
11207 tail = prev;
11208 }
11209 }
11210 while (list-- != htab->input_list);
11211 free (htab->input_list);
11212 #undef PREV_SEC
11213 }
11214
11215 static const unsigned char glink_eh_frame_cie[] =
11216 {
11217 0, 0, 0, 16, /* length. */
11218 0, 0, 0, 0, /* id. */
11219 1, /* CIE version. */
11220 'z', 'R', 0, /* Augmentation string. */
11221 4, /* Code alignment. */
11222 0x78, /* Data alignment. */
11223 65, /* RA reg. */
11224 1, /* Augmentation size. */
11225 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
11226 DW_CFA_def_cfa, 1, 0 /* def_cfa: r1 offset 0. */
11227 };
11228
11229 /* Stripping output sections is normally done before dynamic section
11230 symbols have been allocated. This function is called later, and
11231 handles cases like htab->brlt which is mapped to its own output
11232 section. */
11233
11234 static void
11235 maybe_strip_output (struct bfd_link_info *info, asection *isec)
11236 {
11237 if (isec->size == 0
11238 && isec->output_section->size == 0
11239 && !bfd_section_removed_from_list (info->output_bfd,
11240 isec->output_section)
11241 && elf_section_data (isec->output_section)->dynindx == 0)
11242 {
11243 isec->output_section->flags |= SEC_EXCLUDE;
11244 bfd_section_list_remove (info->output_bfd, isec->output_section);
11245 info->output_bfd->section_count--;
11246 }
11247 }
11248
11249 /* Determine and set the size of the stub section for a final link.
11250
11251 The basic idea here is to examine all the relocations looking for
11252 PC-relative calls to a target that is unreachable with a "bl"
11253 instruction. */
11254
11255 bfd_boolean
11256 ppc64_elf_size_stubs (struct bfd_link_info *info, bfd_signed_vma group_size,
11257 bfd_boolean plt_static_chain, int plt_thread_safe,
11258 int plt_stub_align)
11259 {
11260 bfd_size_type stub_group_size;
11261 bfd_boolean stubs_always_before_branch;
11262 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11263
11264 if (htab == NULL)
11265 return FALSE;
11266
11267 htab->plt_static_chain = plt_static_chain;
11268 htab->plt_stub_align = plt_stub_align;
11269 if (plt_thread_safe == -1)
11270 {
11271 const char *const thread_starter[] =
11272 {
11273 "pthread_create",
11274 /* libstdc++ */
11275 "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE",
11276 /* librt */
11277 "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio",
11278 "mq_notify", "create_timer",
11279 /* libanl */
11280 "getaddrinfo_a",
11281 /* libgomp */
11282 "GOMP_parallel_start",
11283 "GOMP_parallel_loop_static_start",
11284 "GOMP_parallel_loop_dynamic_start",
11285 "GOMP_parallel_loop_guided_start",
11286 "GOMP_parallel_loop_runtime_start",
11287 "GOMP_parallel_sections_start",
11288 };
11289 unsigned i;
11290
11291 for (i = 0; i < sizeof (thread_starter)/ sizeof (thread_starter[0]); i++)
11292 {
11293 struct elf_link_hash_entry *h;
11294 h = elf_link_hash_lookup (&htab->elf, thread_starter[i],
11295 FALSE, FALSE, TRUE);
11296 plt_thread_safe = h != NULL && h->ref_regular;
11297 if (plt_thread_safe)
11298 break;
11299 }
11300 }
11301 htab->plt_thread_safe = plt_thread_safe;
11302 stubs_always_before_branch = group_size < 0;
11303 if (group_size < 0)
11304 stub_group_size = -group_size;
11305 else
11306 stub_group_size = group_size;
11307
11308 group_sections (htab, stub_group_size, stubs_always_before_branch);
11309
11310 while (1)
11311 {
11312 bfd *input_bfd;
11313 unsigned int bfd_indx;
11314 asection *stub_sec;
11315
11316 htab->stub_iteration += 1;
11317
11318 for (input_bfd = info->input_bfds, bfd_indx = 0;
11319 input_bfd != NULL;
11320 input_bfd = input_bfd->link_next, bfd_indx++)
11321 {
11322 Elf_Internal_Shdr *symtab_hdr;
11323 asection *section;
11324 Elf_Internal_Sym *local_syms = NULL;
11325
11326 if (!is_ppc64_elf (input_bfd))
11327 continue;
11328
11329 /* We'll need the symbol table in a second. */
11330 symtab_hdr = &elf_symtab_hdr (input_bfd);
11331 if (symtab_hdr->sh_info == 0)
11332 continue;
11333
11334 /* Walk over each section attached to the input bfd. */
11335 for (section = input_bfd->sections;
11336 section != NULL;
11337 section = section->next)
11338 {
11339 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
11340
11341 /* If there aren't any relocs, then there's nothing more
11342 to do. */
11343 if ((section->flags & SEC_RELOC) == 0
11344 || (section->flags & SEC_ALLOC) == 0
11345 || (section->flags & SEC_LOAD) == 0
11346 || (section->flags & SEC_CODE) == 0
11347 || section->reloc_count == 0)
11348 continue;
11349
11350 /* If this section is a link-once section that will be
11351 discarded, then don't create any stubs. */
11352 if (section->output_section == NULL
11353 || section->output_section->owner != info->output_bfd)
11354 continue;
11355
11356 /* Get the relocs. */
11357 internal_relocs
11358 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
11359 info->keep_memory);
11360 if (internal_relocs == NULL)
11361 goto error_ret_free_local;
11362
11363 /* Now examine each relocation. */
11364 irela = internal_relocs;
11365 irelaend = irela + section->reloc_count;
11366 for (; irela < irelaend; irela++)
11367 {
11368 enum elf_ppc64_reloc_type r_type;
11369 unsigned int r_indx;
11370 enum ppc_stub_type stub_type;
11371 struct ppc_stub_hash_entry *stub_entry;
11372 asection *sym_sec, *code_sec;
11373 bfd_vma sym_value, code_value;
11374 bfd_vma destination;
11375 bfd_boolean ok_dest;
11376 struct ppc_link_hash_entry *hash;
11377 struct ppc_link_hash_entry *fdh;
11378 struct elf_link_hash_entry *h;
11379 Elf_Internal_Sym *sym;
11380 char *stub_name;
11381 const asection *id_sec;
11382 struct _opd_sec_data *opd;
11383 struct plt_entry *plt_ent;
11384
11385 r_type = ELF64_R_TYPE (irela->r_info);
11386 r_indx = ELF64_R_SYM (irela->r_info);
11387
11388 if (r_type >= R_PPC64_max)
11389 {
11390 bfd_set_error (bfd_error_bad_value);
11391 goto error_ret_free_internal;
11392 }
11393
11394 /* Only look for stubs on branch instructions. */
11395 if (r_type != R_PPC64_REL24
11396 && r_type != R_PPC64_REL14
11397 && r_type != R_PPC64_REL14_BRTAKEN
11398 && r_type != R_PPC64_REL14_BRNTAKEN)
11399 continue;
11400
11401 /* Now determine the call target, its name, value,
11402 section. */
11403 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
11404 r_indx, input_bfd))
11405 goto error_ret_free_internal;
11406 hash = (struct ppc_link_hash_entry *) h;
11407
11408 ok_dest = FALSE;
11409 fdh = NULL;
11410 sym_value = 0;
11411 if (hash == NULL)
11412 {
11413 sym_value = sym->st_value;
11414 ok_dest = TRUE;
11415 }
11416 else if (hash->elf.root.type == bfd_link_hash_defined
11417 || hash->elf.root.type == bfd_link_hash_defweak)
11418 {
11419 sym_value = hash->elf.root.u.def.value;
11420 if (sym_sec->output_section != NULL)
11421 ok_dest = TRUE;
11422 }
11423 else if (hash->elf.root.type == bfd_link_hash_undefweak
11424 || hash->elf.root.type == bfd_link_hash_undefined)
11425 {
11426 /* Recognise an old ABI func code entry sym, and
11427 use the func descriptor sym instead if it is
11428 defined. */
11429 if (hash->elf.root.root.string[0] == '.'
11430 && (fdh = lookup_fdh (hash, htab)) != NULL)
11431 {
11432 if (fdh->elf.root.type == bfd_link_hash_defined
11433 || fdh->elf.root.type == bfd_link_hash_defweak)
11434 {
11435 sym_sec = fdh->elf.root.u.def.section;
11436 sym_value = fdh->elf.root.u.def.value;
11437 if (sym_sec->output_section != NULL)
11438 ok_dest = TRUE;
11439 }
11440 else
11441 fdh = NULL;
11442 }
11443 }
11444 else
11445 {
11446 bfd_set_error (bfd_error_bad_value);
11447 goto error_ret_free_internal;
11448 }
11449
11450 destination = 0;
11451 if (ok_dest)
11452 {
11453 sym_value += irela->r_addend;
11454 destination = (sym_value
11455 + sym_sec->output_offset
11456 + sym_sec->output_section->vma);
11457 }
11458
11459 code_sec = sym_sec;
11460 code_value = sym_value;
11461 opd = get_opd_info (sym_sec);
11462 if (opd != NULL)
11463 {
11464 bfd_vma dest;
11465
11466 if (hash == NULL && opd->adjust != NULL)
11467 {
11468 long adjust = opd->adjust[sym_value / 8];
11469 if (adjust == -1)
11470 continue;
11471 code_value += adjust;
11472 sym_value += adjust;
11473 }
11474 dest = opd_entry_value (sym_sec, sym_value,
11475 &code_sec, &code_value);
11476 if (dest != (bfd_vma) -1)
11477 {
11478 destination = dest;
11479 if (fdh != NULL)
11480 {
11481 /* Fixup old ABI sym to point at code
11482 entry. */
11483 hash->elf.root.type = bfd_link_hash_defweak;
11484 hash->elf.root.u.def.section = code_sec;
11485 hash->elf.root.u.def.value = code_value;
11486 }
11487 }
11488 }
11489
11490 /* Determine what (if any) linker stub is needed. */
11491 plt_ent = NULL;
11492 stub_type = ppc_type_of_stub (section, irela, &hash,
11493 &plt_ent, destination);
11494
11495 if (stub_type != ppc_stub_plt_call)
11496 {
11497 /* Check whether we need a TOC adjusting stub.
11498 Since the linker pastes together pieces from
11499 different object files when creating the
11500 _init and _fini functions, it may be that a
11501 call to what looks like a local sym is in
11502 fact a call needing a TOC adjustment. */
11503 if (code_sec != NULL
11504 && code_sec->output_section != NULL
11505 && (htab->stub_group[code_sec->id].toc_off
11506 != htab->stub_group[section->id].toc_off)
11507 && (code_sec->has_toc_reloc
11508 || code_sec->makes_toc_func_call))
11509 stub_type = ppc_stub_long_branch_r2off;
11510 }
11511
11512 if (stub_type == ppc_stub_none)
11513 continue;
11514
11515 /* __tls_get_addr calls might be eliminated. */
11516 if (stub_type != ppc_stub_plt_call
11517 && hash != NULL
11518 && (hash == htab->tls_get_addr
11519 || hash == htab->tls_get_addr_fd)
11520 && section->has_tls_reloc
11521 && irela != internal_relocs)
11522 {
11523 /* Get tls info. */
11524 unsigned char *tls_mask;
11525
11526 if (!get_tls_mask (&tls_mask, NULL, NULL, &local_syms,
11527 irela - 1, input_bfd))
11528 goto error_ret_free_internal;
11529 if (*tls_mask != 0)
11530 continue;
11531 }
11532
11533 if (stub_type == ppc_stub_plt_call
11534 && irela + 1 < irelaend
11535 && irela[1].r_offset == irela->r_offset + 4
11536 && ELF64_R_TYPE (irela[1].r_info) == R_PPC64_TOCSAVE)
11537 {
11538 if (!tocsave_find (htab, INSERT,
11539 &local_syms, irela + 1, input_bfd))
11540 goto error_ret_free_internal;
11541 }
11542 else if (stub_type == ppc_stub_plt_call)
11543 stub_type = ppc_stub_plt_call_r2save;
11544
11545 /* Support for grouping stub sections. */
11546 id_sec = htab->stub_group[section->id].link_sec;
11547
11548 /* Get the name of this stub. */
11549 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
11550 if (!stub_name)
11551 goto error_ret_free_internal;
11552
11553 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
11554 stub_name, FALSE, FALSE);
11555 if (stub_entry != NULL)
11556 {
11557 /* The proper stub has already been created. */
11558 free (stub_name);
11559 if (stub_type == ppc_stub_plt_call_r2save)
11560 stub_entry->stub_type = stub_type;
11561 continue;
11562 }
11563
11564 stub_entry = ppc_add_stub (stub_name, section, info);
11565 if (stub_entry == NULL)
11566 {
11567 free (stub_name);
11568 error_ret_free_internal:
11569 if (elf_section_data (section)->relocs == NULL)
11570 free (internal_relocs);
11571 error_ret_free_local:
11572 if (local_syms != NULL
11573 && (symtab_hdr->contents
11574 != (unsigned char *) local_syms))
11575 free (local_syms);
11576 return FALSE;
11577 }
11578
11579 stub_entry->stub_type = stub_type;
11580 if (stub_type != ppc_stub_plt_call
11581 && stub_type != ppc_stub_plt_call_r2save)
11582 {
11583 stub_entry->target_value = code_value;
11584 stub_entry->target_section = code_sec;
11585 }
11586 else
11587 {
11588 stub_entry->target_value = sym_value;
11589 stub_entry->target_section = sym_sec;
11590 }
11591 stub_entry->h = hash;
11592 stub_entry->plt_ent = plt_ent;
11593 stub_entry->addend = irela->r_addend;
11594
11595 if (stub_entry->h != NULL)
11596 htab->stub_globals += 1;
11597 }
11598
11599 /* We're done with the internal relocs, free them. */
11600 if (elf_section_data (section)->relocs != internal_relocs)
11601 free (internal_relocs);
11602 }
11603
11604 if (local_syms != NULL
11605 && symtab_hdr->contents != (unsigned char *) local_syms)
11606 {
11607 if (!info->keep_memory)
11608 free (local_syms);
11609 else
11610 symtab_hdr->contents = (unsigned char *) local_syms;
11611 }
11612 }
11613
11614 /* We may have added some stubs. Find out the new size of the
11615 stub sections. */
11616 for (stub_sec = htab->stub_bfd->sections;
11617 stub_sec != NULL;
11618 stub_sec = stub_sec->next)
11619 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
11620 {
11621 stub_sec->rawsize = stub_sec->size;
11622 stub_sec->size = 0;
11623 stub_sec->reloc_count = 0;
11624 stub_sec->flags &= ~SEC_RELOC;
11625 }
11626
11627 htab->brlt->size = 0;
11628 htab->brlt->reloc_count = 0;
11629 htab->brlt->flags &= ~SEC_RELOC;
11630 if (htab->relbrlt != NULL)
11631 htab->relbrlt->size = 0;
11632
11633 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
11634
11635 if (info->emitrelocations
11636 && htab->glink != NULL && htab->glink->size != 0)
11637 {
11638 htab->glink->reloc_count = 1;
11639 htab->glink->flags |= SEC_RELOC;
11640 }
11641
11642 if (htab->glink_eh_frame != NULL
11643 && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
11644 && (htab->glink_eh_frame->flags & SEC_EXCLUDE) == 0)
11645 {
11646 bfd_size_type size = 0;
11647
11648 for (stub_sec = htab->stub_bfd->sections;
11649 stub_sec != NULL;
11650 stub_sec = stub_sec->next)
11651 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
11652 size += 20;
11653 if (htab->glink != NULL && htab->glink->size != 0)
11654 size += 24;
11655 if (size != 0)
11656 size += sizeof (glink_eh_frame_cie);
11657 htab->glink_eh_frame->rawsize = htab->glink_eh_frame->size;
11658 htab->glink_eh_frame->size = size;
11659 }
11660
11661 if (htab->plt_stub_align != 0)
11662 for (stub_sec = htab->stub_bfd->sections;
11663 stub_sec != NULL;
11664 stub_sec = stub_sec->next)
11665 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
11666 stub_sec->size = ((stub_sec->size + (1 << htab->plt_stub_align) - 1)
11667 & (-1 << htab->plt_stub_align));
11668
11669 for (stub_sec = htab->stub_bfd->sections;
11670 stub_sec != NULL;
11671 stub_sec = stub_sec->next)
11672 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
11673 && stub_sec->rawsize != stub_sec->size)
11674 break;
11675
11676 /* Exit from this loop when no stubs have been added, and no stubs
11677 have changed size. */
11678 if (stub_sec == NULL
11679 && (htab->glink_eh_frame == NULL
11680 || htab->glink_eh_frame->rawsize == htab->glink_eh_frame->size))
11681 break;
11682
11683 /* Ask the linker to do its stuff. */
11684 (*htab->layout_sections_again) ();
11685 }
11686
11687 maybe_strip_output (info, htab->brlt);
11688 if (htab->glink_eh_frame != NULL)
11689 maybe_strip_output (info, htab->glink_eh_frame);
11690
11691 return TRUE;
11692 }
11693
11694 /* Called after we have determined section placement. If sections
11695 move, we'll be called again. Provide a value for TOCstart. */
11696
11697 bfd_vma
11698 ppc64_elf_toc (bfd *obfd)
11699 {
11700 asection *s;
11701 bfd_vma TOCstart;
11702
11703 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
11704 order. The TOC starts where the first of these sections starts. */
11705 s = bfd_get_section_by_name (obfd, ".got");
11706 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
11707 s = bfd_get_section_by_name (obfd, ".toc");
11708 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
11709 s = bfd_get_section_by_name (obfd, ".tocbss");
11710 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
11711 s = bfd_get_section_by_name (obfd, ".plt");
11712 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
11713 {
11714 /* This may happen for
11715 o references to TOC base (SYM@toc / TOC[tc0]) without a
11716 .toc directive
11717 o bad linker script
11718 o --gc-sections and empty TOC sections
11719
11720 FIXME: Warn user? */
11721
11722 /* Look for a likely section. We probably won't even be
11723 using TOCstart. */
11724 for (s = obfd->sections; s != NULL; s = s->next)
11725 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY
11726 | SEC_EXCLUDE))
11727 == (SEC_ALLOC | SEC_SMALL_DATA))
11728 break;
11729 if (s == NULL)
11730 for (s = obfd->sections; s != NULL; s = s->next)
11731 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_EXCLUDE))
11732 == (SEC_ALLOC | SEC_SMALL_DATA))
11733 break;
11734 if (s == NULL)
11735 for (s = obfd->sections; s != NULL; s = s->next)
11736 if ((s->flags & (SEC_ALLOC | SEC_READONLY | SEC_EXCLUDE))
11737 == SEC_ALLOC)
11738 break;
11739 if (s == NULL)
11740 for (s = obfd->sections; s != NULL; s = s->next)
11741 if ((s->flags & (SEC_ALLOC | SEC_EXCLUDE)) == SEC_ALLOC)
11742 break;
11743 }
11744
11745 TOCstart = 0;
11746 if (s != NULL)
11747 TOCstart = s->output_section->vma + s->output_offset;
11748
11749 return TOCstart;
11750 }
11751
11752 /* Build all the stubs associated with the current output file.
11753 The stubs are kept in a hash table attached to the main linker
11754 hash table. This function is called via gldelf64ppc_finish. */
11755
11756 bfd_boolean
11757 ppc64_elf_build_stubs (bfd_boolean emit_stub_syms,
11758 struct bfd_link_info *info,
11759 char **stats)
11760 {
11761 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11762 asection *stub_sec;
11763 bfd_byte *p;
11764 int stub_sec_count = 0;
11765
11766 if (htab == NULL)
11767 return FALSE;
11768
11769 htab->emit_stub_syms = emit_stub_syms;
11770
11771 /* Allocate memory to hold the linker stubs. */
11772 for (stub_sec = htab->stub_bfd->sections;
11773 stub_sec != NULL;
11774 stub_sec = stub_sec->next)
11775 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
11776 && stub_sec->size != 0)
11777 {
11778 stub_sec->contents = bfd_zalloc (htab->stub_bfd, stub_sec->size);
11779 if (stub_sec->contents == NULL)
11780 return FALSE;
11781 /* We want to check that built size is the same as calculated
11782 size. rawsize is a convenient location to use. */
11783 stub_sec->rawsize = stub_sec->size;
11784 stub_sec->size = 0;
11785 }
11786
11787 if (htab->glink != NULL && htab->glink->size != 0)
11788 {
11789 unsigned int indx;
11790 bfd_vma plt0;
11791
11792 /* Build the .glink plt call stub. */
11793 if (htab->emit_stub_syms)
11794 {
11795 struct elf_link_hash_entry *h;
11796 h = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
11797 TRUE, FALSE, FALSE);
11798 if (h == NULL)
11799 return FALSE;
11800 if (h->root.type == bfd_link_hash_new)
11801 {
11802 h->root.type = bfd_link_hash_defined;
11803 h->root.u.def.section = htab->glink;
11804 h->root.u.def.value = 8;
11805 h->ref_regular = 1;
11806 h->def_regular = 1;
11807 h->ref_regular_nonweak = 1;
11808 h->forced_local = 1;
11809 h->non_elf = 0;
11810 }
11811 }
11812 plt0 = htab->plt->output_section->vma + htab->plt->output_offset - 16;
11813 if (info->emitrelocations)
11814 {
11815 Elf_Internal_Rela *r = get_relocs (htab->glink, 1);
11816 if (r == NULL)
11817 return FALSE;
11818 r->r_offset = (htab->glink->output_offset
11819 + htab->glink->output_section->vma);
11820 r->r_info = ELF64_R_INFO (0, R_PPC64_REL64);
11821 r->r_addend = plt0;
11822 }
11823 p = htab->glink->contents;
11824 plt0 -= htab->glink->output_section->vma + htab->glink->output_offset;
11825 bfd_put_64 (htab->glink->owner, plt0, p);
11826 p += 8;
11827 bfd_put_32 (htab->glink->owner, MFLR_R12, p);
11828 p += 4;
11829 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
11830 p += 4;
11831 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
11832 p += 4;
11833 bfd_put_32 (htab->glink->owner, LD_R2_M16R11, p);
11834 p += 4;
11835 bfd_put_32 (htab->glink->owner, MTLR_R12, p);
11836 p += 4;
11837 bfd_put_32 (htab->glink->owner, ADD_R12_R2_R11, p);
11838 p += 4;
11839 bfd_put_32 (htab->glink->owner, LD_R11_0R12, p);
11840 p += 4;
11841 bfd_put_32 (htab->glink->owner, LD_R2_0R12 | 8, p);
11842 p += 4;
11843 bfd_put_32 (htab->glink->owner, MTCTR_R11, p);
11844 p += 4;
11845 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | 16, p);
11846 p += 4;
11847 bfd_put_32 (htab->glink->owner, BCTR, p);
11848 p += 4;
11849 while (p - htab->glink->contents < GLINK_CALL_STUB_SIZE)
11850 {
11851 bfd_put_32 (htab->glink->owner, NOP, p);
11852 p += 4;
11853 }
11854
11855 /* Build the .glink lazy link call stubs. */
11856 indx = 0;
11857 while (p < htab->glink->contents + htab->glink->size)
11858 {
11859 if (indx < 0x8000)
11860 {
11861 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
11862 p += 4;
11863 }
11864 else
11865 {
11866 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
11867 p += 4;
11868 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx), p);
11869 p += 4;
11870 }
11871 bfd_put_32 (htab->glink->owner,
11872 B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p);
11873 indx++;
11874 p += 4;
11875 }
11876 htab->glink->rawsize = p - htab->glink->contents;
11877 }
11878
11879 if (htab->brlt->size != 0)
11880 {
11881 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
11882 htab->brlt->size);
11883 if (htab->brlt->contents == NULL)
11884 return FALSE;
11885 }
11886 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
11887 {
11888 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
11889 htab->relbrlt->size);
11890 if (htab->relbrlt->contents == NULL)
11891 return FALSE;
11892 }
11893
11894 if (htab->glink_eh_frame != NULL
11895 && htab->glink_eh_frame->size != 0)
11896 {
11897 bfd_vma val;
11898
11899 p = bfd_zalloc (htab->glink_eh_frame->owner, htab->glink_eh_frame->size);
11900 if (p == NULL)
11901 return FALSE;
11902 htab->glink_eh_frame->contents = p;
11903
11904 htab->glink_eh_frame->rawsize = htab->glink_eh_frame->size;
11905
11906 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
11907 /* CIE length (rewrite in case little-endian). */
11908 bfd_put_32 (htab->elf.dynobj, sizeof (glink_eh_frame_cie) - 4, p);
11909 p += sizeof (glink_eh_frame_cie);
11910
11911 for (stub_sec = htab->stub_bfd->sections;
11912 stub_sec != NULL;
11913 stub_sec = stub_sec->next)
11914 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
11915 {
11916 /* FDE length. */
11917 bfd_put_32 (htab->elf.dynobj, 16, p);
11918 p += 4;
11919 /* CIE pointer. */
11920 val = p - htab->glink_eh_frame->contents;
11921 bfd_put_32 (htab->elf.dynobj, val, p);
11922 p += 4;
11923 /* Offset to stub section. */
11924 val = (stub_sec->output_section->vma
11925 + stub_sec->output_offset);
11926 val -= (htab->glink_eh_frame->output_section->vma
11927 + htab->glink_eh_frame->output_offset);
11928 val -= p - htab->glink_eh_frame->contents;
11929 if (val + 0x80000000 > 0xffffffff)
11930 {
11931 info->callbacks->einfo
11932 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
11933 stub_sec->name);
11934 return FALSE;
11935 }
11936 bfd_put_32 (htab->elf.dynobj, val, p);
11937 p += 4;
11938 /* stub section size. */
11939 bfd_put_32 (htab->elf.dynobj, stub_sec->rawsize, p);
11940 p += 4;
11941 /* Augmentation. */
11942 p += 1;
11943 /* Pad. */
11944 p += 3;
11945 }
11946 if (htab->glink != NULL && htab->glink->size != 0)
11947 {
11948 /* FDE length. */
11949 bfd_put_32 (htab->elf.dynobj, 20, p);
11950 p += 4;
11951 /* CIE pointer. */
11952 val = p - htab->glink_eh_frame->contents;
11953 bfd_put_32 (htab->elf.dynobj, val, p);
11954 p += 4;
11955 /* Offset to .glink. */
11956 val = (htab->glink->output_section->vma
11957 + htab->glink->output_offset
11958 + 8);
11959 val -= (htab->glink_eh_frame->output_section->vma
11960 + htab->glink_eh_frame->output_offset);
11961 val -= p - htab->glink_eh_frame->contents;
11962 if (val + 0x80000000 > 0xffffffff)
11963 {
11964 info->callbacks->einfo
11965 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
11966 htab->glink->name);
11967 return FALSE;
11968 }
11969 bfd_put_32 (htab->elf.dynobj, val, p);
11970 p += 4;
11971 /* .glink size. */
11972 bfd_put_32 (htab->elf.dynobj, htab->glink->rawsize - 8, p);
11973 p += 4;
11974 /* Augmentation. */
11975 p += 1;
11976
11977 *p++ = DW_CFA_advance_loc + 1;
11978 *p++ = DW_CFA_register;
11979 *p++ = 65;
11980 *p++ = 12;
11981 *p++ = DW_CFA_advance_loc + 4;
11982 *p++ = DW_CFA_restore_extended;
11983 *p++ = 65;
11984 }
11985 htab->glink_eh_frame->size = p - htab->glink_eh_frame->contents;
11986 }
11987
11988 /* Build the stubs as directed by the stub hash table. */
11989 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
11990
11991 if (htab->relbrlt != NULL)
11992 htab->relbrlt->reloc_count = 0;
11993
11994 if (htab->plt_stub_align != 0)
11995 for (stub_sec = htab->stub_bfd->sections;
11996 stub_sec != NULL;
11997 stub_sec = stub_sec->next)
11998 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
11999 stub_sec->size = ((stub_sec->size + (1 << htab->plt_stub_align) - 1)
12000 & (-1 << htab->plt_stub_align));
12001
12002 for (stub_sec = htab->stub_bfd->sections;
12003 stub_sec != NULL;
12004 stub_sec = stub_sec->next)
12005 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12006 {
12007 stub_sec_count += 1;
12008 if (stub_sec->rawsize != stub_sec->size)
12009 break;
12010 }
12011
12012 if (stub_sec != NULL
12013 || htab->glink->rawsize != htab->glink->size
12014 || (htab->glink_eh_frame != NULL
12015 && htab->glink_eh_frame->rawsize != htab->glink_eh_frame->size))
12016 {
12017 htab->stub_error = TRUE;
12018 info->callbacks->einfo (_("%P: stubs don't match calculated size\n"));
12019 }
12020
12021 if (htab->stub_error)
12022 return FALSE;
12023
12024 if (stats != NULL)
12025 {
12026 *stats = bfd_malloc (500);
12027 if (*stats == NULL)
12028 return FALSE;
12029
12030 sprintf (*stats, _("linker stubs in %u group%s\n"
12031 " branch %lu\n"
12032 " toc adjust %lu\n"
12033 " long branch %lu\n"
12034 " long toc adj %lu\n"
12035 " plt call %lu\n"
12036 " plt call toc %lu"),
12037 stub_sec_count,
12038 stub_sec_count == 1 ? "" : "s",
12039 htab->stub_count[ppc_stub_long_branch - 1],
12040 htab->stub_count[ppc_stub_long_branch_r2off - 1],
12041 htab->stub_count[ppc_stub_plt_branch - 1],
12042 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
12043 htab->stub_count[ppc_stub_plt_call - 1],
12044 htab->stub_count[ppc_stub_plt_call_r2save - 1]);
12045 }
12046 return TRUE;
12047 }
12048
12049 /* This function undoes the changes made by add_symbol_adjust. */
12050
12051 static bfd_boolean
12052 undo_symbol_twiddle (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
12053 {
12054 struct ppc_link_hash_entry *eh;
12055
12056 if (h->root.type == bfd_link_hash_indirect)
12057 return TRUE;
12058
12059 eh = (struct ppc_link_hash_entry *) h;
12060 if (eh->elf.root.type != bfd_link_hash_undefweak || !eh->was_undefined)
12061 return TRUE;
12062
12063 eh->elf.root.type = bfd_link_hash_undefined;
12064 return TRUE;
12065 }
12066
12067 void
12068 ppc64_elf_restore_symbols (struct bfd_link_info *info)
12069 {
12070 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12071
12072 if (htab != NULL)
12073 elf_link_hash_traverse (&htab->elf, undo_symbol_twiddle, info);
12074 }
12075
12076 /* What to do when ld finds relocations against symbols defined in
12077 discarded sections. */
12078
12079 static unsigned int
12080 ppc64_elf_action_discarded (asection *sec)
12081 {
12082 if (strcmp (".opd", sec->name) == 0)
12083 return 0;
12084
12085 if (strcmp (".toc", sec->name) == 0)
12086 return 0;
12087
12088 if (strcmp (".toc1", sec->name) == 0)
12089 return 0;
12090
12091 return _bfd_elf_default_action_discarded (sec);
12092 }
12093
12094 /* The RELOCATE_SECTION function is called by the ELF backend linker
12095 to handle the relocations for a section.
12096
12097 The relocs are always passed as Rela structures; if the section
12098 actually uses Rel structures, the r_addend field will always be
12099 zero.
12100
12101 This function is responsible for adjust the section contents as
12102 necessary, and (if using Rela relocs and generating a
12103 relocatable output file) adjusting the reloc addend as
12104 necessary.
12105
12106 This function does not have to worry about setting the reloc
12107 address or the reloc symbol index.
12108
12109 LOCAL_SYMS is a pointer to the swapped in local symbols.
12110
12111 LOCAL_SECTIONS is an array giving the section in the input file
12112 corresponding to the st_shndx field of each local symbol.
12113
12114 The global hash table entry for the global symbols can be found
12115 via elf_sym_hashes (input_bfd).
12116
12117 When generating relocatable output, this function must handle
12118 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
12119 going to be the section symbol corresponding to the output
12120 section, which means that the addend must be adjusted
12121 accordingly. */
12122
12123 static bfd_boolean
12124 ppc64_elf_relocate_section (bfd *output_bfd,
12125 struct bfd_link_info *info,
12126 bfd *input_bfd,
12127 asection *input_section,
12128 bfd_byte *contents,
12129 Elf_Internal_Rela *relocs,
12130 Elf_Internal_Sym *local_syms,
12131 asection **local_sections)
12132 {
12133 struct ppc_link_hash_table *htab;
12134 Elf_Internal_Shdr *symtab_hdr;
12135 struct elf_link_hash_entry **sym_hashes;
12136 Elf_Internal_Rela *rel;
12137 Elf_Internal_Rela *relend;
12138 Elf_Internal_Rela outrel;
12139 bfd_byte *loc;
12140 struct got_entry **local_got_ents;
12141 bfd_vma TOCstart;
12142 bfd_boolean ret = TRUE;
12143 bfd_boolean is_opd;
12144 /* Assume 'at' branch hints. */
12145 bfd_boolean is_isa_v2 = TRUE;
12146 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
12147
12148 /* Initialize howto table if needed. */
12149 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
12150 ppc_howto_init ();
12151
12152 htab = ppc_hash_table (info);
12153 if (htab == NULL)
12154 return FALSE;
12155
12156 /* Don't relocate stub sections. */
12157 if (input_section->owner == htab->stub_bfd)
12158 return TRUE;
12159
12160 BFD_ASSERT (is_ppc64_elf (input_bfd));
12161
12162 local_got_ents = elf_local_got_ents (input_bfd);
12163 TOCstart = elf_gp (output_bfd);
12164 symtab_hdr = &elf_symtab_hdr (input_bfd);
12165 sym_hashes = elf_sym_hashes (input_bfd);
12166 is_opd = ppc64_elf_section_data (input_section)->sec_type == sec_opd;
12167
12168 rel = relocs;
12169 relend = relocs + input_section->reloc_count;
12170 for (; rel < relend; rel++)
12171 {
12172 enum elf_ppc64_reloc_type r_type;
12173 bfd_vma addend, orig_addend;
12174 bfd_reloc_status_type r;
12175 Elf_Internal_Sym *sym;
12176 asection *sec;
12177 struct elf_link_hash_entry *h_elf;
12178 struct ppc_link_hash_entry *h;
12179 struct ppc_link_hash_entry *fdh;
12180 const char *sym_name;
12181 unsigned long r_symndx, toc_symndx;
12182 bfd_vma toc_addend;
12183 unsigned char tls_mask, tls_gd, tls_type;
12184 unsigned char sym_type;
12185 bfd_vma relocation;
12186 bfd_boolean unresolved_reloc;
12187 bfd_boolean warned;
12188 unsigned int insn;
12189 unsigned int mask;
12190 struct ppc_stub_hash_entry *stub_entry;
12191 bfd_vma max_br_offset;
12192 bfd_vma from;
12193
12194 r_type = ELF64_R_TYPE (rel->r_info);
12195 r_symndx = ELF64_R_SYM (rel->r_info);
12196
12197 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
12198 symbol of the previous ADDR64 reloc. The symbol gives us the
12199 proper TOC base to use. */
12200 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
12201 && rel != relocs
12202 && ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_ADDR64
12203 && is_opd)
12204 r_symndx = ELF64_R_SYM (rel[-1].r_info);
12205
12206 sym = NULL;
12207 sec = NULL;
12208 h_elf = NULL;
12209 sym_name = NULL;
12210 unresolved_reloc = FALSE;
12211 warned = FALSE;
12212 orig_addend = rel->r_addend;
12213
12214 if (r_symndx < symtab_hdr->sh_info)
12215 {
12216 /* It's a local symbol. */
12217 struct _opd_sec_data *opd;
12218
12219 sym = local_syms + r_symndx;
12220 sec = local_sections[r_symndx];
12221 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
12222 sym_type = ELF64_ST_TYPE (sym->st_info);
12223 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
12224 opd = get_opd_info (sec);
12225 if (opd != NULL && opd->adjust != NULL)
12226 {
12227 long adjust = opd->adjust[(sym->st_value + rel->r_addend) / 8];
12228 if (adjust == -1)
12229 relocation = 0;
12230 else
12231 {
12232 /* If this is a relocation against the opd section sym
12233 and we have edited .opd, adjust the reloc addend so
12234 that ld -r and ld --emit-relocs output is correct.
12235 If it is a reloc against some other .opd symbol,
12236 then the symbol value will be adjusted later. */
12237 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
12238 rel->r_addend += adjust;
12239 else
12240 relocation += adjust;
12241 }
12242 }
12243 }
12244 else
12245 {
12246 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
12247 r_symndx, symtab_hdr, sym_hashes,
12248 h_elf, sec, relocation,
12249 unresolved_reloc, warned);
12250 sym_name = h_elf->root.root.string;
12251 sym_type = h_elf->type;
12252 }
12253 h = (struct ppc_link_hash_entry *) h_elf;
12254
12255 if (sec != NULL && elf_discarded_section (sec))
12256 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
12257 rel, relend,
12258 ppc64_elf_howto_table[r_type],
12259 contents);
12260
12261 if (info->relocatable)
12262 continue;
12263
12264 /* TLS optimizations. Replace instruction sequences and relocs
12265 based on information we collected in tls_optimize. We edit
12266 RELOCS so that --emit-relocs will output something sensible
12267 for the final instruction stream. */
12268 tls_mask = 0;
12269 tls_gd = 0;
12270 toc_symndx = 0;
12271 if (h != NULL)
12272 tls_mask = h->tls_mask;
12273 else if (local_got_ents != NULL)
12274 {
12275 struct plt_entry **local_plt = (struct plt_entry **)
12276 (local_got_ents + symtab_hdr->sh_info);
12277 unsigned char *lgot_masks = (unsigned char *)
12278 (local_plt + symtab_hdr->sh_info);
12279 tls_mask = lgot_masks[r_symndx];
12280 }
12281 if (tls_mask == 0
12282 && (r_type == R_PPC64_TLS
12283 || r_type == R_PPC64_TLSGD
12284 || r_type == R_PPC64_TLSLD))
12285 {
12286 /* Check for toc tls entries. */
12287 unsigned char *toc_tls;
12288
12289 if (!get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
12290 &local_syms, rel, input_bfd))
12291 return FALSE;
12292
12293 if (toc_tls)
12294 tls_mask = *toc_tls;
12295 }
12296
12297 /* Check that tls relocs are used with tls syms, and non-tls
12298 relocs are used with non-tls syms. */
12299 if (r_symndx != STN_UNDEF
12300 && r_type != R_PPC64_NONE
12301 && (h == NULL
12302 || h->elf.root.type == bfd_link_hash_defined
12303 || h->elf.root.type == bfd_link_hash_defweak)
12304 && (IS_PPC64_TLS_RELOC (r_type)
12305 != (sym_type == STT_TLS
12306 || (sym_type == STT_SECTION
12307 && (sec->flags & SEC_THREAD_LOCAL) != 0))))
12308 {
12309 if (tls_mask != 0
12310 && (r_type == R_PPC64_TLS
12311 || r_type == R_PPC64_TLSGD
12312 || r_type == R_PPC64_TLSLD))
12313 /* R_PPC64_TLS is OK against a symbol in the TOC. */
12314 ;
12315 else
12316 info->callbacks->einfo
12317 (!IS_PPC64_TLS_RELOC (r_type)
12318 ? _("%P: %H: %s used with TLS symbol %s\n")
12319 : _("%P: %H: %s used with non-TLS symbol %s\n"),
12320 input_bfd, input_section, rel->r_offset,
12321 ppc64_elf_howto_table[r_type]->name,
12322 sym_name);
12323 }
12324
12325 /* Ensure reloc mapping code below stays sane. */
12326 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
12327 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
12328 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
12329 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
12330 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
12331 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
12332 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
12333 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
12334 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
12335 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
12336 abort ();
12337
12338 switch (r_type)
12339 {
12340 default:
12341 break;
12342
12343 case R_PPC64_LO_DS_OPT:
12344 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
12345 if ((insn & (0x3f << 26)) != 58u << 26)
12346 abort ();
12347 insn += (14u << 26) - (58u << 26);
12348 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
12349 r_type = R_PPC64_TOC16_LO;
12350 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12351 break;
12352
12353 case R_PPC64_TOC16:
12354 case R_PPC64_TOC16_LO:
12355 case R_PPC64_TOC16_DS:
12356 case R_PPC64_TOC16_LO_DS:
12357 {
12358 /* Check for toc tls entries. */
12359 unsigned char *toc_tls;
12360 int retval;
12361
12362 retval = get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
12363 &local_syms, rel, input_bfd);
12364 if (retval == 0)
12365 return FALSE;
12366
12367 if (toc_tls)
12368 {
12369 tls_mask = *toc_tls;
12370 if (r_type == R_PPC64_TOC16_DS
12371 || r_type == R_PPC64_TOC16_LO_DS)
12372 {
12373 if (tls_mask != 0
12374 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
12375 goto toctprel;
12376 }
12377 else
12378 {
12379 /* If we found a GD reloc pair, then we might be
12380 doing a GD->IE transition. */
12381 if (retval == 2)
12382 {
12383 tls_gd = TLS_TPRELGD;
12384 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
12385 goto tls_ldgd_opt;
12386 }
12387 else if (retval == 3)
12388 {
12389 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
12390 goto tls_ldgd_opt;
12391 }
12392 }
12393 }
12394 }
12395 break;
12396
12397 case R_PPC64_GOT_TPREL16_HI:
12398 case R_PPC64_GOT_TPREL16_HA:
12399 if (tls_mask != 0
12400 && (tls_mask & TLS_TPREL) == 0)
12401 {
12402 rel->r_offset -= d_offset;
12403 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
12404 r_type = R_PPC64_NONE;
12405 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12406 }
12407 break;
12408
12409 case R_PPC64_GOT_TPREL16_DS:
12410 case R_PPC64_GOT_TPREL16_LO_DS:
12411 if (tls_mask != 0
12412 && (tls_mask & TLS_TPREL) == 0)
12413 {
12414 toctprel:
12415 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
12416 insn &= 31 << 21;
12417 insn |= 0x3c0d0000; /* addis 0,13,0 */
12418 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
12419 r_type = R_PPC64_TPREL16_HA;
12420 if (toc_symndx != 0)
12421 {
12422 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
12423 rel->r_addend = toc_addend;
12424 /* We changed the symbol. Start over in order to
12425 get h, sym, sec etc. right. */
12426 rel--;
12427 continue;
12428 }
12429 else
12430 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12431 }
12432 break;
12433
12434 case R_PPC64_TLS:
12435 if (tls_mask != 0
12436 && (tls_mask & TLS_TPREL) == 0)
12437 {
12438 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
12439 insn = _bfd_elf_ppc_at_tls_transform (insn, 13);
12440 if (insn == 0)
12441 abort ();
12442 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
12443 /* Was PPC64_TLS which sits on insn boundary, now
12444 PPC64_TPREL16_LO which is at low-order half-word. */
12445 rel->r_offset += d_offset;
12446 r_type = R_PPC64_TPREL16_LO;
12447 if (toc_symndx != 0)
12448 {
12449 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
12450 rel->r_addend = toc_addend;
12451 /* We changed the symbol. Start over in order to
12452 get h, sym, sec etc. right. */
12453 rel--;
12454 continue;
12455 }
12456 else
12457 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12458 }
12459 break;
12460
12461 case R_PPC64_GOT_TLSGD16_HI:
12462 case R_PPC64_GOT_TLSGD16_HA:
12463 tls_gd = TLS_TPRELGD;
12464 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
12465 goto tls_gdld_hi;
12466 break;
12467
12468 case R_PPC64_GOT_TLSLD16_HI:
12469 case R_PPC64_GOT_TLSLD16_HA:
12470 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
12471 {
12472 tls_gdld_hi:
12473 if ((tls_mask & tls_gd) != 0)
12474 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
12475 + R_PPC64_GOT_TPREL16_DS);
12476 else
12477 {
12478 rel->r_offset -= d_offset;
12479 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
12480 r_type = R_PPC64_NONE;
12481 }
12482 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12483 }
12484 break;
12485
12486 case R_PPC64_GOT_TLSGD16:
12487 case R_PPC64_GOT_TLSGD16_LO:
12488 tls_gd = TLS_TPRELGD;
12489 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
12490 goto tls_ldgd_opt;
12491 break;
12492
12493 case R_PPC64_GOT_TLSLD16:
12494 case R_PPC64_GOT_TLSLD16_LO:
12495 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
12496 {
12497 unsigned int insn1, insn2, insn3;
12498 bfd_vma offset;
12499
12500 tls_ldgd_opt:
12501 offset = (bfd_vma) -1;
12502 /* If not using the newer R_PPC64_TLSGD/LD to mark
12503 __tls_get_addr calls, we must trust that the call
12504 stays with its arg setup insns, ie. that the next
12505 reloc is the __tls_get_addr call associated with
12506 the current reloc. Edit both insns. */
12507 if (input_section->has_tls_get_addr_call
12508 && rel + 1 < relend
12509 && branch_reloc_hash_match (input_bfd, rel + 1,
12510 htab->tls_get_addr,
12511 htab->tls_get_addr_fd))
12512 offset = rel[1].r_offset;
12513 if ((tls_mask & tls_gd) != 0)
12514 {
12515 /* IE */
12516 insn1 = bfd_get_32 (output_bfd,
12517 contents + rel->r_offset - d_offset);
12518 insn1 &= (1 << 26) - (1 << 2);
12519 insn1 |= 58 << 26; /* ld */
12520 insn2 = 0x7c636a14; /* add 3,3,13 */
12521 if (offset != (bfd_vma) -1)
12522 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
12523 if ((tls_mask & TLS_EXPLICIT) == 0)
12524 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
12525 + R_PPC64_GOT_TPREL16_DS);
12526 else
12527 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
12528 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12529 }
12530 else
12531 {
12532 /* LE */
12533 insn1 = 0x3c6d0000; /* addis 3,13,0 */
12534 insn2 = 0x38630000; /* addi 3,3,0 */
12535 if (tls_gd == 0)
12536 {
12537 /* Was an LD reloc. */
12538 if (toc_symndx)
12539 sec = local_sections[toc_symndx];
12540 for (r_symndx = 0;
12541 r_symndx < symtab_hdr->sh_info;
12542 r_symndx++)
12543 if (local_sections[r_symndx] == sec)
12544 break;
12545 if (r_symndx >= symtab_hdr->sh_info)
12546 r_symndx = STN_UNDEF;
12547 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
12548 if (r_symndx != STN_UNDEF)
12549 rel->r_addend -= (local_syms[r_symndx].st_value
12550 + sec->output_offset
12551 + sec->output_section->vma);
12552 }
12553 else if (toc_symndx != 0)
12554 {
12555 r_symndx = toc_symndx;
12556 rel->r_addend = toc_addend;
12557 }
12558 r_type = R_PPC64_TPREL16_HA;
12559 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12560 if (offset != (bfd_vma) -1)
12561 {
12562 rel[1].r_info = ELF64_R_INFO (r_symndx,
12563 R_PPC64_TPREL16_LO);
12564 rel[1].r_offset = offset + d_offset;
12565 rel[1].r_addend = rel->r_addend;
12566 }
12567 }
12568 bfd_put_32 (output_bfd, insn1,
12569 contents + rel->r_offset - d_offset);
12570 if (offset != (bfd_vma) -1)
12571 {
12572 insn3 = bfd_get_32 (output_bfd,
12573 contents + offset + 4);
12574 if (insn3 == NOP
12575 || insn3 == CROR_151515 || insn3 == CROR_313131)
12576 {
12577 rel[1].r_offset += 4;
12578 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
12579 insn2 = NOP;
12580 }
12581 bfd_put_32 (output_bfd, insn2, contents + offset);
12582 }
12583 if ((tls_mask & tls_gd) == 0
12584 && (tls_gd == 0 || toc_symndx != 0))
12585 {
12586 /* We changed the symbol. Start over in order
12587 to get h, sym, sec etc. right. */
12588 rel--;
12589 continue;
12590 }
12591 }
12592 break;
12593
12594 case R_PPC64_TLSGD:
12595 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
12596 {
12597 unsigned int insn2, insn3;
12598 bfd_vma offset = rel->r_offset;
12599
12600 if ((tls_mask & TLS_TPRELGD) != 0)
12601 {
12602 /* IE */
12603 r_type = R_PPC64_NONE;
12604 insn2 = 0x7c636a14; /* add 3,3,13 */
12605 }
12606 else
12607 {
12608 /* LE */
12609 if (toc_symndx != 0)
12610 {
12611 r_symndx = toc_symndx;
12612 rel->r_addend = toc_addend;
12613 }
12614 r_type = R_PPC64_TPREL16_LO;
12615 rel->r_offset = offset + d_offset;
12616 insn2 = 0x38630000; /* addi 3,3,0 */
12617 }
12618 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12619 /* Zap the reloc on the _tls_get_addr call too. */
12620 BFD_ASSERT (offset == rel[1].r_offset);
12621 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
12622 insn3 = bfd_get_32 (output_bfd,
12623 contents + offset + 4);
12624 if (insn3 == NOP
12625 || insn3 == CROR_151515 || insn3 == CROR_313131)
12626 {
12627 rel->r_offset += 4;
12628 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
12629 insn2 = NOP;
12630 }
12631 bfd_put_32 (output_bfd, insn2, contents + offset);
12632 if ((tls_mask & TLS_TPRELGD) == 0 && toc_symndx != 0)
12633 {
12634 rel--;
12635 continue;
12636 }
12637 }
12638 break;
12639
12640 case R_PPC64_TLSLD:
12641 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
12642 {
12643 unsigned int insn2, insn3;
12644 bfd_vma offset = rel->r_offset;
12645
12646 if (toc_symndx)
12647 sec = local_sections[toc_symndx];
12648 for (r_symndx = 0;
12649 r_symndx < symtab_hdr->sh_info;
12650 r_symndx++)
12651 if (local_sections[r_symndx] == sec)
12652 break;
12653 if (r_symndx >= symtab_hdr->sh_info)
12654 r_symndx = STN_UNDEF;
12655 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
12656 if (r_symndx != STN_UNDEF)
12657 rel->r_addend -= (local_syms[r_symndx].st_value
12658 + sec->output_offset
12659 + sec->output_section->vma);
12660
12661 r_type = R_PPC64_TPREL16_LO;
12662 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12663 rel->r_offset = offset + d_offset;
12664 /* Zap the reloc on the _tls_get_addr call too. */
12665 BFD_ASSERT (offset == rel[1].r_offset);
12666 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
12667 insn2 = 0x38630000; /* addi 3,3,0 */
12668 insn3 = bfd_get_32 (output_bfd,
12669 contents + offset + 4);
12670 if (insn3 == NOP
12671 || insn3 == CROR_151515 || insn3 == CROR_313131)
12672 {
12673 rel->r_offset += 4;
12674 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
12675 insn2 = NOP;
12676 }
12677 bfd_put_32 (output_bfd, insn2, contents + offset);
12678 rel--;
12679 continue;
12680 }
12681 break;
12682
12683 case R_PPC64_DTPMOD64:
12684 if (rel + 1 < relend
12685 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
12686 && rel[1].r_offset == rel->r_offset + 8)
12687 {
12688 if ((tls_mask & TLS_GD) == 0)
12689 {
12690 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
12691 if ((tls_mask & TLS_TPRELGD) != 0)
12692 r_type = R_PPC64_TPREL64;
12693 else
12694 {
12695 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
12696 r_type = R_PPC64_NONE;
12697 }
12698 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12699 }
12700 }
12701 else
12702 {
12703 if ((tls_mask & TLS_LD) == 0)
12704 {
12705 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
12706 r_type = R_PPC64_NONE;
12707 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12708 }
12709 }
12710 break;
12711
12712 case R_PPC64_TPREL64:
12713 if ((tls_mask & TLS_TPREL) == 0)
12714 {
12715 r_type = R_PPC64_NONE;
12716 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12717 }
12718 break;
12719 }
12720
12721 /* Handle other relocations that tweak non-addend part of insn. */
12722 insn = 0;
12723 max_br_offset = 1 << 25;
12724 addend = rel->r_addend;
12725 switch (r_type)
12726 {
12727 default:
12728 break;
12729
12730 case R_PPC64_TOCSAVE:
12731 if (relocation + addend == (rel->r_offset
12732 + input_section->output_offset
12733 + input_section->output_section->vma)
12734 && tocsave_find (htab, NO_INSERT,
12735 &local_syms, rel, input_bfd))
12736 {
12737 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
12738 if (insn == NOP
12739 || insn == CROR_151515 || insn == CROR_313131)
12740 bfd_put_32 (input_bfd, STD_R2_40R1,
12741 contents + rel->r_offset);
12742 }
12743 break;
12744
12745 /* Branch taken prediction relocations. */
12746 case R_PPC64_ADDR14_BRTAKEN:
12747 case R_PPC64_REL14_BRTAKEN:
12748 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
12749 /* Fall thru. */
12750
12751 /* Branch not taken prediction relocations. */
12752 case R_PPC64_ADDR14_BRNTAKEN:
12753 case R_PPC64_REL14_BRNTAKEN:
12754 insn |= bfd_get_32 (output_bfd,
12755 contents + rel->r_offset) & ~(0x01 << 21);
12756 /* Fall thru. */
12757
12758 case R_PPC64_REL14:
12759 max_br_offset = 1 << 15;
12760 /* Fall thru. */
12761
12762 case R_PPC64_REL24:
12763 /* Calls to functions with a different TOC, such as calls to
12764 shared objects, need to alter the TOC pointer. This is
12765 done using a linkage stub. A REL24 branching to these
12766 linkage stubs needs to be followed by a nop, as the nop
12767 will be replaced with an instruction to restore the TOC
12768 base pointer. */
12769 fdh = h;
12770 if (h != NULL
12771 && h->oh != NULL
12772 && h->oh->is_func_descriptor)
12773 fdh = ppc_follow_link (h->oh);
12774 stub_entry = ppc_get_stub_entry (input_section, sec, fdh, rel, htab);
12775 if (stub_entry != NULL
12776 && (stub_entry->stub_type == ppc_stub_plt_call
12777 || stub_entry->stub_type == ppc_stub_plt_call_r2save
12778 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
12779 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
12780 {
12781 bfd_boolean can_plt_call = FALSE;
12782
12783 if (rel->r_offset + 8 <= input_section->size)
12784 {
12785 unsigned long nop;
12786 nop = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
12787 if (nop == NOP
12788 || nop == CROR_151515 || nop == CROR_313131)
12789 {
12790 if (h != NULL
12791 && (h == htab->tls_get_addr_fd
12792 || h == htab->tls_get_addr)
12793 && !htab->no_tls_get_addr_opt)
12794 {
12795 /* Special stub used, leave nop alone. */
12796 }
12797 else
12798 bfd_put_32 (input_bfd, LD_R2_40R1,
12799 contents + rel->r_offset + 4);
12800 can_plt_call = TRUE;
12801 }
12802 }
12803
12804 if (!can_plt_call)
12805 {
12806 if (stub_entry->stub_type == ppc_stub_plt_call
12807 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
12808 {
12809 /* If this is a plain branch rather than a branch
12810 and link, don't require a nop. However, don't
12811 allow tail calls in a shared library as they
12812 will result in r2 being corrupted. */
12813 unsigned long br;
12814 br = bfd_get_32 (input_bfd, contents + rel->r_offset);
12815 if (info->executable && (br & 1) == 0)
12816 can_plt_call = TRUE;
12817 else
12818 stub_entry = NULL;
12819 }
12820 else if (h != NULL
12821 && strcmp (h->elf.root.root.string,
12822 ".__libc_start_main") == 0)
12823 {
12824 /* Allow crt1 branch to go via a toc adjusting stub. */
12825 can_plt_call = TRUE;
12826 }
12827 else
12828 {
12829 if (strcmp (input_section->output_section->name,
12830 ".init") == 0
12831 || strcmp (input_section->output_section->name,
12832 ".fini") == 0)
12833 info->callbacks->einfo
12834 (_("%P: %H: automatic multiple TOCs "
12835 "not supported using your crt files; "
12836 "recompile with -mminimal-toc or upgrade gcc\n"),
12837 input_bfd, input_section, rel->r_offset);
12838 else
12839 info->callbacks->einfo
12840 (_("%P: %H: sibling call optimization to `%s' "
12841 "does not allow automatic multiple TOCs; "
12842 "recompile with -mminimal-toc or "
12843 "-fno-optimize-sibling-calls, "
12844 "or make `%s' extern\n"),
12845 input_bfd, input_section, rel->r_offset,
12846 sym_name,
12847 sym_name);
12848 bfd_set_error (bfd_error_bad_value);
12849 ret = FALSE;
12850 }
12851 }
12852
12853 if (can_plt_call
12854 && (stub_entry->stub_type == ppc_stub_plt_call
12855 || stub_entry->stub_type == ppc_stub_plt_call_r2save))
12856 unresolved_reloc = FALSE;
12857 }
12858
12859 if ((stub_entry == NULL
12860 || stub_entry->stub_type == ppc_stub_long_branch
12861 || stub_entry->stub_type == ppc_stub_plt_branch)
12862 && get_opd_info (sec) != NULL)
12863 {
12864 /* The branch destination is the value of the opd entry. */
12865 bfd_vma off = (relocation + addend
12866 - sec->output_section->vma
12867 - sec->output_offset);
12868 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL);
12869 if (dest != (bfd_vma) -1)
12870 {
12871 relocation = dest;
12872 addend = 0;
12873 }
12874 }
12875
12876 /* If the branch is out of reach we ought to have a long
12877 branch stub. */
12878 from = (rel->r_offset
12879 + input_section->output_offset
12880 + input_section->output_section->vma);
12881
12882 if (stub_entry != NULL
12883 && (stub_entry->stub_type == ppc_stub_long_branch
12884 || stub_entry->stub_type == ppc_stub_plt_branch)
12885 && (r_type == R_PPC64_ADDR14_BRTAKEN
12886 || r_type == R_PPC64_ADDR14_BRNTAKEN
12887 || (relocation + addend - from + max_br_offset
12888 < 2 * max_br_offset)))
12889 /* Don't use the stub if this branch is in range. */
12890 stub_entry = NULL;
12891
12892 if (stub_entry != NULL)
12893 {
12894 /* Munge up the value and addend so that we call the stub
12895 rather than the procedure directly. */
12896 relocation = (stub_entry->stub_offset
12897 + stub_entry->stub_sec->output_offset
12898 + stub_entry->stub_sec->output_section->vma);
12899 addend = 0;
12900
12901 if ((stub_entry->stub_type == ppc_stub_plt_call
12902 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
12903 && (ALWAYS_EMIT_R2SAVE
12904 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
12905 && rel + 1 < relend
12906 && rel[1].r_offset == rel->r_offset + 4
12907 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOCSAVE)
12908 relocation += 4;
12909 }
12910
12911 if (insn != 0)
12912 {
12913 if (is_isa_v2)
12914 {
12915 /* Set 'a' bit. This is 0b00010 in BO field for branch
12916 on CR(BI) insns (BO == 001at or 011at), and 0b01000
12917 for branch on CTR insns (BO == 1a00t or 1a01t). */
12918 if ((insn & (0x14 << 21)) == (0x04 << 21))
12919 insn |= 0x02 << 21;
12920 else if ((insn & (0x14 << 21)) == (0x10 << 21))
12921 insn |= 0x08 << 21;
12922 else
12923 break;
12924 }
12925 else
12926 {
12927 /* Invert 'y' bit if not the default. */
12928 if ((bfd_signed_vma) (relocation + addend - from) < 0)
12929 insn ^= 0x01 << 21;
12930 }
12931
12932 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
12933 }
12934
12935 /* NOP out calls to undefined weak functions.
12936 We can thus call a weak function without first
12937 checking whether the function is defined. */
12938 else if (h != NULL
12939 && h->elf.root.type == bfd_link_hash_undefweak
12940 && h->elf.dynindx == -1
12941 && r_type == R_PPC64_REL24
12942 && relocation == 0
12943 && addend == 0)
12944 {
12945 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
12946 continue;
12947 }
12948 break;
12949 }
12950
12951 /* Set `addend'. */
12952 tls_type = 0;
12953 switch (r_type)
12954 {
12955 default:
12956 info->callbacks->einfo
12957 (_("%P: %B: unknown relocation type %d for symbol %s\n"),
12958 input_bfd, (int) r_type, sym_name);
12959
12960 bfd_set_error (bfd_error_bad_value);
12961 ret = FALSE;
12962 continue;
12963
12964 case R_PPC64_NONE:
12965 case R_PPC64_TLS:
12966 case R_PPC64_TLSGD:
12967 case R_PPC64_TLSLD:
12968 case R_PPC64_TOCSAVE:
12969 case R_PPC64_GNU_VTINHERIT:
12970 case R_PPC64_GNU_VTENTRY:
12971 continue;
12972
12973 /* GOT16 relocations. Like an ADDR16 using the symbol's
12974 address in the GOT as relocation value instead of the
12975 symbol's value itself. Also, create a GOT entry for the
12976 symbol and put the symbol value there. */
12977 case R_PPC64_GOT_TLSGD16:
12978 case R_PPC64_GOT_TLSGD16_LO:
12979 case R_PPC64_GOT_TLSGD16_HI:
12980 case R_PPC64_GOT_TLSGD16_HA:
12981 tls_type = TLS_TLS | TLS_GD;
12982 goto dogot;
12983
12984 case R_PPC64_GOT_TLSLD16:
12985 case R_PPC64_GOT_TLSLD16_LO:
12986 case R_PPC64_GOT_TLSLD16_HI:
12987 case R_PPC64_GOT_TLSLD16_HA:
12988 tls_type = TLS_TLS | TLS_LD;
12989 goto dogot;
12990
12991 case R_PPC64_GOT_TPREL16_DS:
12992 case R_PPC64_GOT_TPREL16_LO_DS:
12993 case R_PPC64_GOT_TPREL16_HI:
12994 case R_PPC64_GOT_TPREL16_HA:
12995 tls_type = TLS_TLS | TLS_TPREL;
12996 goto dogot;
12997
12998 case R_PPC64_GOT_DTPREL16_DS:
12999 case R_PPC64_GOT_DTPREL16_LO_DS:
13000 case R_PPC64_GOT_DTPREL16_HI:
13001 case R_PPC64_GOT_DTPREL16_HA:
13002 tls_type = TLS_TLS | TLS_DTPREL;
13003 goto dogot;
13004
13005 case R_PPC64_GOT16:
13006 case R_PPC64_GOT16_LO:
13007 case R_PPC64_GOT16_HI:
13008 case R_PPC64_GOT16_HA:
13009 case R_PPC64_GOT16_DS:
13010 case R_PPC64_GOT16_LO_DS:
13011 dogot:
13012 {
13013 /* Relocation is to the entry for this symbol in the global
13014 offset table. */
13015 asection *got;
13016 bfd_vma *offp;
13017 bfd_vma off;
13018 unsigned long indx = 0;
13019 struct got_entry *ent;
13020
13021 if (tls_type == (TLS_TLS | TLS_LD)
13022 && (h == NULL
13023 || !h->elf.def_dynamic))
13024 ent = ppc64_tlsld_got (input_bfd);
13025 else
13026 {
13027
13028 if (h != NULL)
13029 {
13030 bfd_boolean dyn = htab->elf.dynamic_sections_created;
13031 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared,
13032 &h->elf)
13033 || (info->shared
13034 && SYMBOL_CALLS_LOCAL (info, &h->elf)))
13035 /* This is actually a static link, or it is a
13036 -Bsymbolic link and the symbol is defined
13037 locally, or the symbol was forced to be local
13038 because of a version file. */
13039 ;
13040 else
13041 {
13042 indx = h->elf.dynindx;
13043 unresolved_reloc = FALSE;
13044 }
13045 ent = h->elf.got.glist;
13046 }
13047 else
13048 {
13049 if (local_got_ents == NULL)
13050 abort ();
13051 ent = local_got_ents[r_symndx];
13052 }
13053
13054 for (; ent != NULL; ent = ent->next)
13055 if (ent->addend == orig_addend
13056 && ent->owner == input_bfd
13057 && ent->tls_type == tls_type)
13058 break;
13059 }
13060
13061 if (ent == NULL)
13062 abort ();
13063 if (ent->is_indirect)
13064 ent = ent->got.ent;
13065 offp = &ent->got.offset;
13066 got = ppc64_elf_tdata (ent->owner)->got;
13067 if (got == NULL)
13068 abort ();
13069
13070 /* The offset must always be a multiple of 8. We use the
13071 least significant bit to record whether we have already
13072 processed this entry. */
13073 off = *offp;
13074 if ((off & 1) != 0)
13075 off &= ~1;
13076 else
13077 {
13078 /* Generate relocs for the dynamic linker, except in
13079 the case of TLSLD where we'll use one entry per
13080 module. */
13081 asection *relgot;
13082 bfd_boolean ifunc;
13083
13084 *offp = off | 1;
13085 relgot = NULL;
13086 ifunc = (h != NULL
13087 ? h->elf.type == STT_GNU_IFUNC
13088 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC);
13089 if ((info->shared || indx != 0)
13090 && (h == NULL
13091 || (tls_type == (TLS_TLS | TLS_LD)
13092 && !h->elf.def_dynamic)
13093 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
13094 || h->elf.root.type != bfd_link_hash_undefweak))
13095 relgot = ppc64_elf_tdata (ent->owner)->relgot;
13096 else if (ifunc)
13097 relgot = htab->reliplt;
13098 if (relgot != NULL)
13099 {
13100 outrel.r_offset = (got->output_section->vma
13101 + got->output_offset
13102 + off);
13103 outrel.r_addend = addend;
13104 if (tls_type & (TLS_LD | TLS_GD))
13105 {
13106 outrel.r_addend = 0;
13107 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
13108 if (tls_type == (TLS_TLS | TLS_GD))
13109 {
13110 loc = relgot->contents;
13111 loc += (relgot->reloc_count++
13112 * sizeof (Elf64_External_Rela));
13113 bfd_elf64_swap_reloca_out (output_bfd,
13114 &outrel, loc);
13115 outrel.r_offset += 8;
13116 outrel.r_addend = addend;
13117 outrel.r_info
13118 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
13119 }
13120 }
13121 else if (tls_type == (TLS_TLS | TLS_DTPREL))
13122 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
13123 else if (tls_type == (TLS_TLS | TLS_TPREL))
13124 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
13125 else if (indx != 0)
13126 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
13127 else
13128 {
13129 if (ifunc)
13130 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
13131 else
13132 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
13133
13134 /* Write the .got section contents for the sake
13135 of prelink. */
13136 loc = got->contents + off;
13137 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
13138 loc);
13139 }
13140
13141 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
13142 {
13143 outrel.r_addend += relocation;
13144 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
13145 outrel.r_addend -= htab->elf.tls_sec->vma;
13146 }
13147 loc = relgot->contents;
13148 loc += (relgot->reloc_count++
13149 * sizeof (Elf64_External_Rela));
13150 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
13151 }
13152
13153 /* Init the .got section contents here if we're not
13154 emitting a reloc. */
13155 else
13156 {
13157 relocation += addend;
13158 if (tls_type == (TLS_TLS | TLS_LD))
13159 relocation = 1;
13160 else if (tls_type != 0)
13161 {
13162 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
13163 if (tls_type == (TLS_TLS | TLS_TPREL))
13164 relocation += DTP_OFFSET - TP_OFFSET;
13165
13166 if (tls_type == (TLS_TLS | TLS_GD))
13167 {
13168 bfd_put_64 (output_bfd, relocation,
13169 got->contents + off + 8);
13170 relocation = 1;
13171 }
13172 }
13173
13174 bfd_put_64 (output_bfd, relocation,
13175 got->contents + off);
13176 }
13177 }
13178
13179 if (off >= (bfd_vma) -2)
13180 abort ();
13181
13182 relocation = got->output_section->vma + got->output_offset + off;
13183 addend = -(TOCstart + htab->stub_group[input_section->id].toc_off);
13184 }
13185 break;
13186
13187 case R_PPC64_PLT16_HA:
13188 case R_PPC64_PLT16_HI:
13189 case R_PPC64_PLT16_LO:
13190 case R_PPC64_PLT32:
13191 case R_PPC64_PLT64:
13192 /* Relocation is to the entry for this symbol in the
13193 procedure linkage table. */
13194
13195 /* Resolve a PLT reloc against a local symbol directly,
13196 without using the procedure linkage table. */
13197 if (h == NULL)
13198 break;
13199
13200 /* It's possible that we didn't make a PLT entry for this
13201 symbol. This happens when statically linking PIC code,
13202 or when using -Bsymbolic. Go find a match if there is a
13203 PLT entry. */
13204 if (htab->plt != NULL)
13205 {
13206 struct plt_entry *ent;
13207 for (ent = h->elf.plt.plist; ent != NULL; ent = ent->next)
13208 if (ent->addend == orig_addend
13209 && ent->plt.offset != (bfd_vma) -1)
13210 {
13211 relocation = (htab->plt->output_section->vma
13212 + htab->plt->output_offset
13213 + ent->plt.offset);
13214 unresolved_reloc = FALSE;
13215 }
13216 }
13217 break;
13218
13219 case R_PPC64_TOC:
13220 /* Relocation value is TOC base. */
13221 relocation = TOCstart;
13222 if (r_symndx == STN_UNDEF)
13223 relocation += htab->stub_group[input_section->id].toc_off;
13224 else if (unresolved_reloc)
13225 ;
13226 else if (sec != NULL && sec->id <= htab->top_id)
13227 relocation += htab->stub_group[sec->id].toc_off;
13228 else
13229 unresolved_reloc = TRUE;
13230 goto dodyn;
13231
13232 /* TOC16 relocs. We want the offset relative to the TOC base,
13233 which is the address of the start of the TOC plus 0x8000.
13234 The TOC consists of sections .got, .toc, .tocbss, and .plt,
13235 in this order. */
13236 case R_PPC64_TOC16:
13237 case R_PPC64_TOC16_LO:
13238 case R_PPC64_TOC16_HI:
13239 case R_PPC64_TOC16_DS:
13240 case R_PPC64_TOC16_LO_DS:
13241 case R_PPC64_TOC16_HA:
13242 addend -= TOCstart + htab->stub_group[input_section->id].toc_off;
13243 break;
13244
13245 /* Relocate against the beginning of the section. */
13246 case R_PPC64_SECTOFF:
13247 case R_PPC64_SECTOFF_LO:
13248 case R_PPC64_SECTOFF_HI:
13249 case R_PPC64_SECTOFF_DS:
13250 case R_PPC64_SECTOFF_LO_DS:
13251 case R_PPC64_SECTOFF_HA:
13252 if (sec != NULL)
13253 addend -= sec->output_section->vma;
13254 break;
13255
13256 case R_PPC64_REL16:
13257 case R_PPC64_REL16_LO:
13258 case R_PPC64_REL16_HI:
13259 case R_PPC64_REL16_HA:
13260 break;
13261
13262 case R_PPC64_REL14:
13263 case R_PPC64_REL14_BRNTAKEN:
13264 case R_PPC64_REL14_BRTAKEN:
13265 case R_PPC64_REL24:
13266 break;
13267
13268 case R_PPC64_TPREL16:
13269 case R_PPC64_TPREL16_LO:
13270 case R_PPC64_TPREL16_HI:
13271 case R_PPC64_TPREL16_HA:
13272 case R_PPC64_TPREL16_DS:
13273 case R_PPC64_TPREL16_LO_DS:
13274 case R_PPC64_TPREL16_HIGHER:
13275 case R_PPC64_TPREL16_HIGHERA:
13276 case R_PPC64_TPREL16_HIGHEST:
13277 case R_PPC64_TPREL16_HIGHESTA:
13278 if (h != NULL
13279 && h->elf.root.type == bfd_link_hash_undefweak
13280 && h->elf.dynindx == -1)
13281 {
13282 /* Make this relocation against an undefined weak symbol
13283 resolve to zero. This is really just a tweak, since
13284 code using weak externs ought to check that they are
13285 defined before using them. */
13286 bfd_byte *p = contents + rel->r_offset - d_offset;
13287
13288 insn = bfd_get_32 (output_bfd, p);
13289 insn = _bfd_elf_ppc_at_tprel_transform (insn, 13);
13290 if (insn != 0)
13291 bfd_put_32 (output_bfd, insn, p);
13292 break;
13293 }
13294 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
13295 if (info->shared)
13296 /* The TPREL16 relocs shouldn't really be used in shared
13297 libs as they will result in DT_TEXTREL being set, but
13298 support them anyway. */
13299 goto dodyn;
13300 break;
13301
13302 case R_PPC64_DTPREL16:
13303 case R_PPC64_DTPREL16_LO:
13304 case R_PPC64_DTPREL16_HI:
13305 case R_PPC64_DTPREL16_HA:
13306 case R_PPC64_DTPREL16_DS:
13307 case R_PPC64_DTPREL16_LO_DS:
13308 case R_PPC64_DTPREL16_HIGHER:
13309 case R_PPC64_DTPREL16_HIGHERA:
13310 case R_PPC64_DTPREL16_HIGHEST:
13311 case R_PPC64_DTPREL16_HIGHESTA:
13312 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
13313 break;
13314
13315 case R_PPC64_DTPMOD64:
13316 relocation = 1;
13317 addend = 0;
13318 goto dodyn;
13319
13320 case R_PPC64_TPREL64:
13321 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
13322 goto dodyn;
13323
13324 case R_PPC64_DTPREL64:
13325 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
13326 /* Fall thru */
13327
13328 /* Relocations that may need to be propagated if this is a
13329 dynamic object. */
13330 case R_PPC64_REL30:
13331 case R_PPC64_REL32:
13332 case R_PPC64_REL64:
13333 case R_PPC64_ADDR14:
13334 case R_PPC64_ADDR14_BRNTAKEN:
13335 case R_PPC64_ADDR14_BRTAKEN:
13336 case R_PPC64_ADDR16:
13337 case R_PPC64_ADDR16_DS:
13338 case R_PPC64_ADDR16_HA:
13339 case R_PPC64_ADDR16_HI:
13340 case R_PPC64_ADDR16_HIGHER:
13341 case R_PPC64_ADDR16_HIGHERA:
13342 case R_PPC64_ADDR16_HIGHEST:
13343 case R_PPC64_ADDR16_HIGHESTA:
13344 case R_PPC64_ADDR16_LO:
13345 case R_PPC64_ADDR16_LO_DS:
13346 case R_PPC64_ADDR24:
13347 case R_PPC64_ADDR32:
13348 case R_PPC64_ADDR64:
13349 case R_PPC64_UADDR16:
13350 case R_PPC64_UADDR32:
13351 case R_PPC64_UADDR64:
13352 dodyn:
13353 if ((input_section->flags & SEC_ALLOC) == 0)
13354 break;
13355
13356 if (NO_OPD_RELOCS && is_opd)
13357 break;
13358
13359 if ((info->shared
13360 && (h == NULL
13361 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
13362 || h->elf.root.type != bfd_link_hash_undefweak)
13363 && (must_be_dyn_reloc (info, r_type)
13364 || !SYMBOL_CALLS_LOCAL (info, &h->elf)))
13365 || (ELIMINATE_COPY_RELOCS
13366 && !info->shared
13367 && h != NULL
13368 && h->elf.dynindx != -1
13369 && !h->elf.non_got_ref
13370 && !h->elf.def_regular)
13371 || (!info->shared
13372 && (h != NULL
13373 ? h->elf.type == STT_GNU_IFUNC
13374 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)))
13375 {
13376 bfd_boolean skip, relocate;
13377 asection *sreloc;
13378 bfd_vma out_off;
13379
13380 /* When generating a dynamic object, these relocations
13381 are copied into the output file to be resolved at run
13382 time. */
13383
13384 skip = FALSE;
13385 relocate = FALSE;
13386
13387 out_off = _bfd_elf_section_offset (output_bfd, info,
13388 input_section, rel->r_offset);
13389 if (out_off == (bfd_vma) -1)
13390 skip = TRUE;
13391 else if (out_off == (bfd_vma) -2)
13392 skip = TRUE, relocate = TRUE;
13393 out_off += (input_section->output_section->vma
13394 + input_section->output_offset);
13395 outrel.r_offset = out_off;
13396 outrel.r_addend = rel->r_addend;
13397
13398 /* Optimize unaligned reloc use. */
13399 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
13400 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
13401 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
13402 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
13403 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
13404 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
13405 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
13406 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
13407 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
13408
13409 if (skip)
13410 memset (&outrel, 0, sizeof outrel);
13411 else if (!SYMBOL_CALLS_LOCAL (info, &h->elf)
13412 && !is_opd
13413 && r_type != R_PPC64_TOC)
13414 outrel.r_info = ELF64_R_INFO (h->elf.dynindx, r_type);
13415 else
13416 {
13417 /* This symbol is local, or marked to become local,
13418 or this is an opd section reloc which must point
13419 at a local function. */
13420 outrel.r_addend += relocation;
13421 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
13422 {
13423 if (is_opd && h != NULL)
13424 {
13425 /* Lie about opd entries. This case occurs
13426 when building shared libraries and we
13427 reference a function in another shared
13428 lib. The same thing happens for a weak
13429 definition in an application that's
13430 overridden by a strong definition in a
13431 shared lib. (I believe this is a generic
13432 bug in binutils handling of weak syms.)
13433 In these cases we won't use the opd
13434 entry in this lib. */
13435 unresolved_reloc = FALSE;
13436 }
13437 if (!is_opd
13438 && r_type == R_PPC64_ADDR64
13439 && (h != NULL
13440 ? h->elf.type == STT_GNU_IFUNC
13441 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
13442 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
13443 else
13444 {
13445 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
13446
13447 /* We need to relocate .opd contents for ld.so.
13448 Prelink also wants simple and consistent rules
13449 for relocs. This make all RELATIVE relocs have
13450 *r_offset equal to r_addend. */
13451 relocate = TRUE;
13452 }
13453 }
13454 else
13455 {
13456 long indx = 0;
13457
13458 if (h != NULL
13459 ? h->elf.type == STT_GNU_IFUNC
13460 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
13461 {
13462 info->callbacks->einfo
13463 (_("%P: %H: relocation %s for indirect "
13464 "function %s unsupported\n"),
13465 input_bfd, input_section, rel->r_offset,
13466 ppc64_elf_howto_table[r_type]->name,
13467 sym_name);
13468 ret = FALSE;
13469 }
13470 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
13471 ;
13472 else if (sec == NULL || sec->owner == NULL)
13473 {
13474 bfd_set_error (bfd_error_bad_value);
13475 return FALSE;
13476 }
13477 else
13478 {
13479 asection *osec;
13480
13481 osec = sec->output_section;
13482 indx = elf_section_data (osec)->dynindx;
13483
13484 if (indx == 0)
13485 {
13486 if ((osec->flags & SEC_READONLY) == 0
13487 && htab->elf.data_index_section != NULL)
13488 osec = htab->elf.data_index_section;
13489 else
13490 osec = htab->elf.text_index_section;
13491 indx = elf_section_data (osec)->dynindx;
13492 }
13493 BFD_ASSERT (indx != 0);
13494
13495 /* We are turning this relocation into one
13496 against a section symbol, so subtract out
13497 the output section's address but not the
13498 offset of the input section in the output
13499 section. */
13500 outrel.r_addend -= osec->vma;
13501 }
13502
13503 outrel.r_info = ELF64_R_INFO (indx, r_type);
13504 }
13505 }
13506
13507 sreloc = elf_section_data (input_section)->sreloc;
13508 if (!htab->elf.dynamic_sections_created)
13509 sreloc = htab->reliplt;
13510 if (sreloc == NULL)
13511 abort ();
13512
13513 if (sreloc->reloc_count * sizeof (Elf64_External_Rela)
13514 >= sreloc->size)
13515 abort ();
13516 loc = sreloc->contents;
13517 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
13518 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
13519
13520 /* If this reloc is against an external symbol, it will
13521 be computed at runtime, so there's no need to do
13522 anything now. However, for the sake of prelink ensure
13523 that the section contents are a known value. */
13524 if (! relocate)
13525 {
13526 unresolved_reloc = FALSE;
13527 /* The value chosen here is quite arbitrary as ld.so
13528 ignores section contents except for the special
13529 case of .opd where the contents might be accessed
13530 before relocation. Choose zero, as that won't
13531 cause reloc overflow. */
13532 relocation = 0;
13533 addend = 0;
13534 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
13535 to improve backward compatibility with older
13536 versions of ld. */
13537 if (r_type == R_PPC64_ADDR64)
13538 addend = outrel.r_addend;
13539 /* Adjust pc_relative relocs to have zero in *r_offset. */
13540 else if (ppc64_elf_howto_table[r_type]->pc_relative)
13541 addend = (input_section->output_section->vma
13542 + input_section->output_offset
13543 + rel->r_offset);
13544 }
13545 }
13546 break;
13547
13548 case R_PPC64_COPY:
13549 case R_PPC64_GLOB_DAT:
13550 case R_PPC64_JMP_SLOT:
13551 case R_PPC64_JMP_IREL:
13552 case R_PPC64_RELATIVE:
13553 /* We shouldn't ever see these dynamic relocs in relocatable
13554 files. */
13555 /* Fall through. */
13556
13557 case R_PPC64_PLTGOT16:
13558 case R_PPC64_PLTGOT16_DS:
13559 case R_PPC64_PLTGOT16_HA:
13560 case R_PPC64_PLTGOT16_HI:
13561 case R_PPC64_PLTGOT16_LO:
13562 case R_PPC64_PLTGOT16_LO_DS:
13563 case R_PPC64_PLTREL32:
13564 case R_PPC64_PLTREL64:
13565 /* These ones haven't been implemented yet. */
13566
13567 info->callbacks->einfo
13568 (_("%P: %B: relocation %s is not supported for symbol %s\n"),
13569 input_bfd,
13570 ppc64_elf_howto_table[r_type]->name, sym_name);
13571
13572 bfd_set_error (bfd_error_invalid_operation);
13573 ret = FALSE;
13574 continue;
13575 }
13576
13577 /* Multi-instruction sequences that access the TOC can be
13578 optimized, eg. addis ra,r2,0; addi rb,ra,x;
13579 to nop; addi rb,r2,x; */
13580 switch (r_type)
13581 {
13582 default:
13583 break;
13584
13585 case R_PPC64_GOT_TLSLD16_HI:
13586 case R_PPC64_GOT_TLSGD16_HI:
13587 case R_PPC64_GOT_TPREL16_HI:
13588 case R_PPC64_GOT_DTPREL16_HI:
13589 case R_PPC64_GOT16_HI:
13590 case R_PPC64_TOC16_HI:
13591 /* These relocs would only be useful if building up an
13592 offset to later add to r2, perhaps in an indexed
13593 addressing mode instruction. Don't try to optimize.
13594 Unfortunately, the possibility of someone building up an
13595 offset like this or even with the HA relocs, means that
13596 we need to check the high insn when optimizing the low
13597 insn. */
13598 break;
13599
13600 case R_PPC64_GOT_TLSLD16_HA:
13601 case R_PPC64_GOT_TLSGD16_HA:
13602 case R_PPC64_GOT_TPREL16_HA:
13603 case R_PPC64_GOT_DTPREL16_HA:
13604 case R_PPC64_GOT16_HA:
13605 case R_PPC64_TOC16_HA:
13606 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
13607 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
13608 {
13609 bfd_byte *p = contents + (rel->r_offset & ~3);
13610 bfd_put_32 (input_bfd, NOP, p);
13611 }
13612 break;
13613
13614 case R_PPC64_GOT_TLSLD16_LO:
13615 case R_PPC64_GOT_TLSGD16_LO:
13616 case R_PPC64_GOT_TPREL16_LO_DS:
13617 case R_PPC64_GOT_DTPREL16_LO_DS:
13618 case R_PPC64_GOT16_LO:
13619 case R_PPC64_GOT16_LO_DS:
13620 case R_PPC64_TOC16_LO:
13621 case R_PPC64_TOC16_LO_DS:
13622 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
13623 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
13624 {
13625 bfd_byte *p = contents + (rel->r_offset & ~3);
13626 insn = bfd_get_32 (input_bfd, p);
13627 if ((insn & (0x3f << 26)) == 12u << 26 /* addic */)
13628 {
13629 /* Transform addic to addi when we change reg. */
13630 insn &= ~((0x3f << 26) | (0x1f << 16));
13631 insn |= (14u << 26) | (2 << 16);
13632 }
13633 else
13634 {
13635 insn &= ~(0x1f << 16);
13636 insn |= 2 << 16;
13637 }
13638 bfd_put_32 (input_bfd, insn, p);
13639 }
13640 break;
13641 }
13642
13643 /* Do any further special processing. */
13644 switch (r_type)
13645 {
13646 default:
13647 break;
13648
13649 case R_PPC64_ADDR16_HA:
13650 case R_PPC64_REL16_HA:
13651 case R_PPC64_ADDR16_HIGHERA:
13652 case R_PPC64_ADDR16_HIGHESTA:
13653 case R_PPC64_TOC16_HA:
13654 case R_PPC64_SECTOFF_HA:
13655 case R_PPC64_TPREL16_HA:
13656 case R_PPC64_DTPREL16_HA:
13657 case R_PPC64_TPREL16_HIGHER:
13658 case R_PPC64_TPREL16_HIGHERA:
13659 case R_PPC64_TPREL16_HIGHEST:
13660 case R_PPC64_TPREL16_HIGHESTA:
13661 case R_PPC64_DTPREL16_HIGHER:
13662 case R_PPC64_DTPREL16_HIGHERA:
13663 case R_PPC64_DTPREL16_HIGHEST:
13664 case R_PPC64_DTPREL16_HIGHESTA:
13665 /* It's just possible that this symbol is a weak symbol
13666 that's not actually defined anywhere. In that case,
13667 'sec' would be NULL, and we should leave the symbol
13668 alone (it will be set to zero elsewhere in the link). */
13669 if (sec == NULL)
13670 break;
13671 /* Fall thru */
13672
13673 case R_PPC64_GOT16_HA:
13674 case R_PPC64_PLTGOT16_HA:
13675 case R_PPC64_PLT16_HA:
13676 case R_PPC64_GOT_TLSGD16_HA:
13677 case R_PPC64_GOT_TLSLD16_HA:
13678 case R_PPC64_GOT_TPREL16_HA:
13679 case R_PPC64_GOT_DTPREL16_HA:
13680 /* Add 0x10000 if sign bit in 0:15 is set.
13681 Bits 0:15 are not used. */
13682 addend += 0x8000;
13683 break;
13684
13685 case R_PPC64_ADDR16_DS:
13686 case R_PPC64_ADDR16_LO_DS:
13687 case R_PPC64_GOT16_DS:
13688 case R_PPC64_GOT16_LO_DS:
13689 case R_PPC64_PLT16_LO_DS:
13690 case R_PPC64_SECTOFF_DS:
13691 case R_PPC64_SECTOFF_LO_DS:
13692 case R_PPC64_TOC16_DS:
13693 case R_PPC64_TOC16_LO_DS:
13694 case R_PPC64_PLTGOT16_DS:
13695 case R_PPC64_PLTGOT16_LO_DS:
13696 case R_PPC64_GOT_TPREL16_DS:
13697 case R_PPC64_GOT_TPREL16_LO_DS:
13698 case R_PPC64_GOT_DTPREL16_DS:
13699 case R_PPC64_GOT_DTPREL16_LO_DS:
13700 case R_PPC64_TPREL16_DS:
13701 case R_PPC64_TPREL16_LO_DS:
13702 case R_PPC64_DTPREL16_DS:
13703 case R_PPC64_DTPREL16_LO_DS:
13704 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
13705 mask = 3;
13706 /* If this reloc is against an lq insn, then the value must be
13707 a multiple of 16. This is somewhat of a hack, but the
13708 "correct" way to do this by defining _DQ forms of all the
13709 _DS relocs bloats all reloc switches in this file. It
13710 doesn't seem to make much sense to use any of these relocs
13711 in data, so testing the insn should be safe. */
13712 if ((insn & (0x3f << 26)) == (56u << 26))
13713 mask = 15;
13714 if (((relocation + addend) & mask) != 0)
13715 {
13716 info->callbacks->einfo
13717 (_("%P: %H: error: %s not a multiple of %u\n"),
13718 input_bfd, input_section, rel->r_offset,
13719 ppc64_elf_howto_table[r_type]->name,
13720 mask + 1);
13721 bfd_set_error (bfd_error_bad_value);
13722 ret = FALSE;
13723 continue;
13724 }
13725 break;
13726 }
13727
13728 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
13729 because such sections are not SEC_ALLOC and thus ld.so will
13730 not process them. */
13731 if (unresolved_reloc
13732 && !((input_section->flags & SEC_DEBUGGING) != 0
13733 && h->elf.def_dynamic)
13734 && _bfd_elf_section_offset (output_bfd, info, input_section,
13735 rel->r_offset) != (bfd_vma) -1)
13736 {
13737 info->callbacks->einfo
13738 (_("%P: %H: unresolvable %s relocation against symbol `%s'\n"),
13739 input_bfd, input_section, rel->r_offset,
13740 ppc64_elf_howto_table[(int) r_type]->name,
13741 h->elf.root.root.string);
13742 ret = FALSE;
13743 }
13744
13745 r = _bfd_final_link_relocate (ppc64_elf_howto_table[(int) r_type],
13746 input_bfd,
13747 input_section,
13748 contents,
13749 rel->r_offset,
13750 relocation,
13751 addend);
13752
13753 if (r != bfd_reloc_ok)
13754 {
13755 if (sym_name == NULL)
13756 sym_name = "(null)";
13757 if (r == bfd_reloc_overflow)
13758 {
13759 if (warned)
13760 continue;
13761 if (h != NULL
13762 && h->elf.root.type == bfd_link_hash_undefweak
13763 && ppc64_elf_howto_table[r_type]->pc_relative)
13764 {
13765 /* Assume this is a call protected by other code that
13766 detects the symbol is undefined. If this is the case,
13767 we can safely ignore the overflow. If not, the
13768 program is hosed anyway, and a little warning isn't
13769 going to help. */
13770
13771 continue;
13772 }
13773
13774 if (!((*info->callbacks->reloc_overflow)
13775 (info, (h ? &h->elf.root : NULL), sym_name,
13776 ppc64_elf_howto_table[r_type]->name,
13777 orig_addend, input_bfd, input_section, rel->r_offset)))
13778 return FALSE;
13779 }
13780 else
13781 {
13782 info->callbacks->einfo
13783 (_("%P: %H: %s reloc against `%s': error %d\n"),
13784 input_bfd, input_section, rel->r_offset,
13785 ppc64_elf_howto_table[r_type]->name,
13786 sym_name,
13787 (int) r);
13788 ret = FALSE;
13789 }
13790 }
13791 }
13792
13793 /* If we're emitting relocations, then shortly after this function
13794 returns, reloc offsets and addends for this section will be
13795 adjusted. Worse, reloc symbol indices will be for the output
13796 file rather than the input. Save a copy of the relocs for
13797 opd_entry_value. */
13798 if (is_opd && (info->emitrelocations || info->relocatable))
13799 {
13800 bfd_size_type amt;
13801 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
13802 rel = bfd_alloc (input_bfd, amt);
13803 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd_relocs == NULL);
13804 ppc64_elf_tdata (input_bfd)->opd_relocs = rel;
13805 if (rel == NULL)
13806 return FALSE;
13807 memcpy (rel, relocs, amt);
13808 }
13809 return ret;
13810 }
13811
13812 /* Adjust the value of any local symbols in opd sections. */
13813
13814 static int
13815 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
13816 const char *name ATTRIBUTE_UNUSED,
13817 Elf_Internal_Sym *elfsym,
13818 asection *input_sec,
13819 struct elf_link_hash_entry *h)
13820 {
13821 struct _opd_sec_data *opd;
13822 long adjust;
13823 bfd_vma value;
13824
13825 if (h != NULL)
13826 return 1;
13827
13828 opd = get_opd_info (input_sec);
13829 if (opd == NULL || opd->adjust == NULL)
13830 return 1;
13831
13832 value = elfsym->st_value - input_sec->output_offset;
13833 if (!info->relocatable)
13834 value -= input_sec->output_section->vma;
13835
13836 adjust = opd->adjust[value / 8];
13837 if (adjust == -1)
13838 return 2;
13839
13840 elfsym->st_value += adjust;
13841 return 1;
13842 }
13843
13844 /* Finish up dynamic symbol handling. We set the contents of various
13845 dynamic sections here. */
13846
13847 static bfd_boolean
13848 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
13849 struct bfd_link_info *info,
13850 struct elf_link_hash_entry *h,
13851 Elf_Internal_Sym *sym)
13852 {
13853 struct ppc_link_hash_table *htab;
13854 struct plt_entry *ent;
13855 Elf_Internal_Rela rela;
13856 bfd_byte *loc;
13857
13858 htab = ppc_hash_table (info);
13859 if (htab == NULL)
13860 return FALSE;
13861
13862 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
13863 if (ent->plt.offset != (bfd_vma) -1)
13864 {
13865 /* This symbol has an entry in the procedure linkage
13866 table. Set it up. */
13867 if (!htab->elf.dynamic_sections_created
13868 || h->dynindx == -1)
13869 {
13870 BFD_ASSERT (h->type == STT_GNU_IFUNC
13871 && h->def_regular
13872 && (h->root.type == bfd_link_hash_defined
13873 || h->root.type == bfd_link_hash_defweak));
13874 rela.r_offset = (htab->iplt->output_section->vma
13875 + htab->iplt->output_offset
13876 + ent->plt.offset);
13877 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
13878 rela.r_addend = (h->root.u.def.value
13879 + h->root.u.def.section->output_offset
13880 + h->root.u.def.section->output_section->vma
13881 + ent->addend);
13882 loc = (htab->reliplt->contents
13883 + (htab->reliplt->reloc_count++
13884 * sizeof (Elf64_External_Rela)));
13885 }
13886 else
13887 {
13888 rela.r_offset = (htab->plt->output_section->vma
13889 + htab->plt->output_offset
13890 + ent->plt.offset);
13891 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
13892 rela.r_addend = ent->addend;
13893 loc = (htab->relplt->contents
13894 + ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE)
13895 / (PLT_ENTRY_SIZE / sizeof (Elf64_External_Rela))));
13896 }
13897 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
13898 }
13899
13900 if (h->needs_copy)
13901 {
13902 /* This symbol needs a copy reloc. Set it up. */
13903
13904 if (h->dynindx == -1
13905 || (h->root.type != bfd_link_hash_defined
13906 && h->root.type != bfd_link_hash_defweak)
13907 || htab->relbss == NULL)
13908 abort ();
13909
13910 rela.r_offset = (h->root.u.def.value
13911 + h->root.u.def.section->output_section->vma
13912 + h->root.u.def.section->output_offset);
13913 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
13914 rela.r_addend = 0;
13915 loc = htab->relbss->contents;
13916 loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela);
13917 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
13918 }
13919
13920 /* Mark some specially defined symbols as absolute. */
13921 if (strcmp (h->root.root.string, "_DYNAMIC") == 0)
13922 sym->st_shndx = SHN_ABS;
13923
13924 return TRUE;
13925 }
13926
13927 /* Used to decide how to sort relocs in an optimal manner for the
13928 dynamic linker, before writing them out. */
13929
13930 static enum elf_reloc_type_class
13931 ppc64_elf_reloc_type_class (const Elf_Internal_Rela *rela)
13932 {
13933 enum elf_ppc64_reloc_type r_type;
13934
13935 r_type = ELF64_R_TYPE (rela->r_info);
13936 switch (r_type)
13937 {
13938 case R_PPC64_RELATIVE:
13939 return reloc_class_relative;
13940 case R_PPC64_JMP_SLOT:
13941 return reloc_class_plt;
13942 case R_PPC64_COPY:
13943 return reloc_class_copy;
13944 default:
13945 return reloc_class_normal;
13946 }
13947 }
13948
13949 /* Finish up the dynamic sections. */
13950
13951 static bfd_boolean
13952 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
13953 struct bfd_link_info *info)
13954 {
13955 struct ppc_link_hash_table *htab;
13956 bfd *dynobj;
13957 asection *sdyn;
13958
13959 htab = ppc_hash_table (info);
13960 if (htab == NULL)
13961 return FALSE;
13962
13963 dynobj = htab->elf.dynobj;
13964 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
13965
13966 if (htab->elf.dynamic_sections_created)
13967 {
13968 Elf64_External_Dyn *dyncon, *dynconend;
13969
13970 if (sdyn == NULL || htab->got == NULL)
13971 abort ();
13972
13973 dyncon = (Elf64_External_Dyn *) sdyn->contents;
13974 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
13975 for (; dyncon < dynconend; dyncon++)
13976 {
13977 Elf_Internal_Dyn dyn;
13978 asection *s;
13979
13980 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
13981
13982 switch (dyn.d_tag)
13983 {
13984 default:
13985 continue;
13986
13987 case DT_PPC64_GLINK:
13988 s = htab->glink;
13989 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
13990 /* We stupidly defined DT_PPC64_GLINK to be the start
13991 of glink rather than the first entry point, which is
13992 what ld.so needs, and now have a bigger stub to
13993 support automatic multiple TOCs. */
13994 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 32;
13995 break;
13996
13997 case DT_PPC64_OPD:
13998 s = bfd_get_section_by_name (output_bfd, ".opd");
13999 if (s == NULL)
14000 continue;
14001 dyn.d_un.d_ptr = s->vma;
14002 break;
14003
14004 case DT_PPC64_OPDSZ:
14005 s = bfd_get_section_by_name (output_bfd, ".opd");
14006 if (s == NULL)
14007 continue;
14008 dyn.d_un.d_val = s->size;
14009 break;
14010
14011 case DT_PLTGOT:
14012 s = htab->plt;
14013 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
14014 break;
14015
14016 case DT_JMPREL:
14017 s = htab->relplt;
14018 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
14019 break;
14020
14021 case DT_PLTRELSZ:
14022 dyn.d_un.d_val = htab->relplt->size;
14023 break;
14024
14025 case DT_RELASZ:
14026 /* Don't count procedure linkage table relocs in the
14027 overall reloc count. */
14028 s = htab->relplt;
14029 if (s == NULL)
14030 continue;
14031 dyn.d_un.d_val -= s->size;
14032 break;
14033
14034 case DT_RELA:
14035 /* We may not be using the standard ELF linker script.
14036 If .rela.plt is the first .rela section, we adjust
14037 DT_RELA to not include it. */
14038 s = htab->relplt;
14039 if (s == NULL)
14040 continue;
14041 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
14042 continue;
14043 dyn.d_un.d_ptr += s->size;
14044 break;
14045 }
14046
14047 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
14048 }
14049 }
14050
14051 if (htab->got != NULL && htab->got->size != 0)
14052 {
14053 /* Fill in the first entry in the global offset table.
14054 We use it to hold the link-time TOCbase. */
14055 bfd_put_64 (output_bfd,
14056 elf_gp (output_bfd) + TOC_BASE_OFF,
14057 htab->got->contents);
14058
14059 /* Set .got entry size. */
14060 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 8;
14061 }
14062
14063 if (htab->plt != NULL && htab->plt->size != 0)
14064 {
14065 /* Set .plt entry size. */
14066 elf_section_data (htab->plt->output_section)->this_hdr.sh_entsize
14067 = PLT_ENTRY_SIZE;
14068 }
14069
14070 /* brlt is SEC_LINKER_CREATED, so we need to write out relocs for
14071 brlt ourselves if emitrelocations. */
14072 if (htab->brlt != NULL
14073 && htab->brlt->reloc_count != 0
14074 && !_bfd_elf_link_output_relocs (output_bfd,
14075 htab->brlt,
14076 elf_section_data (htab->brlt)->rela.hdr,
14077 elf_section_data (htab->brlt)->relocs,
14078 NULL))
14079 return FALSE;
14080
14081 if (htab->glink != NULL
14082 && htab->glink->reloc_count != 0
14083 && !_bfd_elf_link_output_relocs (output_bfd,
14084 htab->glink,
14085 elf_section_data (htab->glink)->rela.hdr,
14086 elf_section_data (htab->glink)->relocs,
14087 NULL))
14088 return FALSE;
14089
14090
14091 if (htab->glink_eh_frame != NULL
14092 && htab->glink_eh_frame->sec_info_type == ELF_INFO_TYPE_EH_FRAME
14093 && !_bfd_elf_write_section_eh_frame (output_bfd, info,
14094 htab->glink_eh_frame,
14095 htab->glink_eh_frame->contents))
14096 return FALSE;
14097
14098 /* We need to handle writing out multiple GOT sections ourselves,
14099 since we didn't add them to DYNOBJ. We know dynobj is the first
14100 bfd. */
14101 while ((dynobj = dynobj->link_next) != NULL)
14102 {
14103 asection *s;
14104
14105 if (!is_ppc64_elf (dynobj))
14106 continue;
14107
14108 s = ppc64_elf_tdata (dynobj)->got;
14109 if (s != NULL
14110 && s->size != 0
14111 && s->output_section != bfd_abs_section_ptr
14112 && !bfd_set_section_contents (output_bfd, s->output_section,
14113 s->contents, s->output_offset,
14114 s->size))
14115 return FALSE;
14116 s = ppc64_elf_tdata (dynobj)->relgot;
14117 if (s != NULL
14118 && s->size != 0
14119 && s->output_section != bfd_abs_section_ptr
14120 && !bfd_set_section_contents (output_bfd, s->output_section,
14121 s->contents, s->output_offset,
14122 s->size))
14123 return FALSE;
14124 }
14125
14126 return TRUE;
14127 }
14128
14129 #include "elf64-target.h"
14130
14131 /* FreeBSD support */
14132
14133 #undef TARGET_LITTLE_SYM
14134 #undef TARGET_LITTLE_NAME
14135
14136 #undef TARGET_BIG_SYM
14137 #define TARGET_BIG_SYM bfd_elf64_powerpc_freebsd_vec
14138 #undef TARGET_BIG_NAME
14139 #define TARGET_BIG_NAME "elf64-powerpc-freebsd"
14140
14141 #undef ELF_OSABI
14142 #define ELF_OSABI ELFOSABI_FREEBSD
14143
14144 #undef elf64_bed
14145 #define elf64_bed elf64_powerpc_fbsd_bed
14146
14147 #include "elf64-target.h"
14148