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fix set but unused variable warnings
[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 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
38 static bfd_reloc_status_type ppc64_elf_ha_reloc
39 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
40 static bfd_reloc_status_type ppc64_elf_branch_reloc
41 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
42 static bfd_reloc_status_type ppc64_elf_brtaken_reloc
43 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
44 static bfd_reloc_status_type ppc64_elf_sectoff_reloc
45 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
46 static bfd_reloc_status_type ppc64_elf_sectoff_ha_reloc
47 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
48 static bfd_reloc_status_type ppc64_elf_toc_reloc
49 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
50 static bfd_reloc_status_type ppc64_elf_toc_ha_reloc
51 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
52 static bfd_reloc_status_type ppc64_elf_toc64_reloc
53 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
54 static bfd_reloc_status_type ppc64_elf_unhandled_reloc
55 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
56 static bfd_vma opd_entry_value
57 (asection *, bfd_vma, asection **, bfd_vma *);
58
59 #define TARGET_LITTLE_SYM bfd_elf64_powerpcle_vec
60 #define TARGET_LITTLE_NAME "elf64-powerpcle"
61 #define TARGET_BIG_SYM bfd_elf64_powerpc_vec
62 #define TARGET_BIG_NAME "elf64-powerpc"
63 #define ELF_ARCH bfd_arch_powerpc
64 #define ELF_MACHINE_CODE EM_PPC64
65 #define ELF_MAXPAGESIZE 0x10000
66 #define ELF_COMMONPAGESIZE 0x1000
67 #define elf_info_to_howto ppc64_elf_info_to_howto
68
69 #define elf_backend_want_got_sym 0
70 #define elf_backend_want_plt_sym 0
71 #define elf_backend_plt_alignment 3
72 #define elf_backend_plt_not_loaded 1
73 #define elf_backend_got_header_size 8
74 #define elf_backend_can_gc_sections 1
75 #define elf_backend_can_refcount 1
76 #define elf_backend_rela_normal 1
77 #define elf_backend_default_execstack 0
78
79 #define bfd_elf64_mkobject ppc64_elf_mkobject
80 #define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup
81 #define bfd_elf64_bfd_reloc_name_lookup ppc64_elf_reloc_name_lookup
82 #define bfd_elf64_bfd_merge_private_bfd_data ppc64_elf_merge_private_bfd_data
83 #define bfd_elf64_new_section_hook ppc64_elf_new_section_hook
84 #define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create
85 #define bfd_elf64_bfd_link_hash_table_free ppc64_elf_link_hash_table_free
86 #define bfd_elf64_get_synthetic_symtab ppc64_elf_get_synthetic_symtab
87
88 #define elf_backend_object_p ppc64_elf_object_p
89 #define elf_backend_grok_prstatus ppc64_elf_grok_prstatus
90 #define elf_backend_grok_psinfo ppc64_elf_grok_psinfo
91 #define elf_backend_write_core_note ppc64_elf_write_core_note
92 #define elf_backend_create_dynamic_sections ppc64_elf_create_dynamic_sections
93 #define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol
94 #define elf_backend_add_symbol_hook ppc64_elf_add_symbol_hook
95 #define elf_backend_check_directives ppc64_elf_process_dot_syms
96 #define elf_backend_as_needed_cleanup ppc64_elf_as_needed_cleanup
97 #define elf_backend_archive_symbol_lookup ppc64_elf_archive_symbol_lookup
98 #define elf_backend_check_relocs ppc64_elf_check_relocs
99 #define elf_backend_gc_keep ppc64_elf_gc_keep
100 #define elf_backend_gc_mark_dynamic_ref ppc64_elf_gc_mark_dynamic_ref
101 #define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook
102 #define elf_backend_gc_sweep_hook ppc64_elf_gc_sweep_hook
103 #define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol
104 #define elf_backend_hide_symbol ppc64_elf_hide_symbol
105 #define elf_backend_always_size_sections ppc64_elf_func_desc_adjust
106 #define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections
107 #define elf_backend_init_index_section _bfd_elf_init_2_index_sections
108 #define elf_backend_action_discarded ppc64_elf_action_discarded
109 #define elf_backend_relocate_section ppc64_elf_relocate_section
110 #define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol
111 #define elf_backend_reloc_type_class ppc64_elf_reloc_type_class
112 #define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections
113 #define elf_backend_link_output_symbol_hook ppc64_elf_output_symbol_hook
114 #define elf_backend_special_sections ppc64_elf_special_sections
115 #define elf_backend_post_process_headers _bfd_elf_set_osabi
116
117 /* The name of the dynamic interpreter. This is put in the .interp
118 section. */
119 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
120
121 /* The size in bytes of an entry in the procedure linkage table. */
122 #define PLT_ENTRY_SIZE 24
123
124 /* The initial size of the plt reserved for the dynamic linker. */
125 #define PLT_INITIAL_ENTRY_SIZE PLT_ENTRY_SIZE
126
127 /* TOC base pointers offset from start of TOC. */
128 #define TOC_BASE_OFF 0x8000
129
130 /* Offset of tp and dtp pointers from start of TLS block. */
131 #define TP_OFFSET 0x7000
132 #define DTP_OFFSET 0x8000
133
134 /* .plt call stub instructions. The normal stub is like this, but
135 sometimes the .plt entry crosses a 64k boundary and we need to
136 insert an addi to adjust r12. */
137 #define PLT_CALL_STUB_SIZE (7*4)
138 #define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */
139 #define STD_R2_40R1 0xf8410028 /* std %r2,40(%r1) */
140 #define LD_R11_0R12 0xe96c0000 /* ld %r11,xxx+0@l(%r12) */
141 #define MTCTR_R11 0x7d6903a6 /* mtctr %r11 */
142 #define LD_R2_0R12 0xe84c0000 /* ld %r2,xxx+8@l(%r12) */
143 /* ld %r11,xxx+16@l(%r12) */
144 #define BCTR 0x4e800420 /* bctr */
145
146
147 #define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,off@ha */
148 #define ADDI_R12_R12 0x398c0000 /* addi %r12,%r12,off@l */
149 #define ADDIS_R2_R2 0x3c420000 /* addis %r2,%r2,off@ha */
150 #define ADDI_R2_R2 0x38420000 /* addi %r2,%r2,off@l */
151
152 #define LD_R11_0R2 0xe9620000 /* ld %r11,xxx+0(%r2) */
153 #define LD_R2_0R2 0xe8420000 /* ld %r2,xxx+0(%r2) */
154
155 #define LD_R2_40R1 0xe8410028 /* ld %r2,40(%r1) */
156
157 /* glink call stub instructions. We enter with the index in R0. */
158 #define GLINK_CALL_STUB_SIZE (16*4)
159 /* 0: */
160 /* .quad plt0-1f */
161 /* __glink: */
162 #define MFLR_R12 0x7d8802a6 /* mflr %12 */
163 #define BCL_20_31 0x429f0005 /* bcl 20,31,1f */
164 /* 1: */
165 #define MFLR_R11 0x7d6802a6 /* mflr %11 */
166 #define LD_R2_M16R11 0xe84bfff0 /* ld %2,(0b-1b)(%11) */
167 #define MTLR_R12 0x7d8803a6 /* mtlr %12 */
168 #define ADD_R12_R2_R11 0x7d825a14 /* add %12,%2,%11 */
169 /* ld %11,0(%12) */
170 /* ld %2,8(%12) */
171 /* mtctr %11 */
172 /* ld %11,16(%12) */
173 /* bctr */
174
175 /* Pad with this. */
176 #define NOP 0x60000000
177
178 /* Some other nops. */
179 #define CROR_151515 0x4def7b82
180 #define CROR_313131 0x4ffffb82
181
182 /* .glink entries for the first 32k functions are two instructions. */
183 #define LI_R0_0 0x38000000 /* li %r0,0 */
184 #define B_DOT 0x48000000 /* b . */
185
186 /* After that, we need two instructions to load the index, followed by
187 a branch. */
188 #define LIS_R0_0 0x3c000000 /* lis %r0,0 */
189 #define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
190
191 /* Instructions used by the save and restore reg functions. */
192 #define STD_R0_0R1 0xf8010000 /* std %r0,0(%r1) */
193 #define STD_R0_0R12 0xf80c0000 /* std %r0,0(%r12) */
194 #define LD_R0_0R1 0xe8010000 /* ld %r0,0(%r1) */
195 #define LD_R0_0R12 0xe80c0000 /* ld %r0,0(%r12) */
196 #define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
197 #define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
198 #define LI_R12_0 0x39800000 /* li %r12,0 */
199 #define STVX_VR0_R12_R0 0x7c0c01ce /* stvx %v0,%r12,%r0 */
200 #define LVX_VR0_R12_R0 0x7c0c00ce /* lvx %v0,%r12,%r0 */
201 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
202 #define BLR 0x4e800020 /* blr */
203
204 /* Since .opd is an array of descriptors and each entry will end up
205 with identical R_PPC64_RELATIVE relocs, there is really no need to
206 propagate .opd relocs; The dynamic linker should be taught to
207 relocate .opd without reloc entries. */
208 #ifndef NO_OPD_RELOCS
209 #define NO_OPD_RELOCS 0
210 #endif
211 \f
212 #define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1)
213
214 /* Relocation HOWTO's. */
215 static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max];
216
217 static reloc_howto_type ppc64_elf_howto_raw[] = {
218 /* This reloc does nothing. */
219 HOWTO (R_PPC64_NONE, /* type */
220 0, /* rightshift */
221 2, /* size (0 = byte, 1 = short, 2 = long) */
222 32, /* bitsize */
223 FALSE, /* pc_relative */
224 0, /* bitpos */
225 complain_overflow_dont, /* complain_on_overflow */
226 bfd_elf_generic_reloc, /* special_function */
227 "R_PPC64_NONE", /* name */
228 FALSE, /* partial_inplace */
229 0, /* src_mask */
230 0, /* dst_mask */
231 FALSE), /* pcrel_offset */
232
233 /* A standard 32 bit relocation. */
234 HOWTO (R_PPC64_ADDR32, /* type */
235 0, /* rightshift */
236 2, /* size (0 = byte, 1 = short, 2 = long) */
237 32, /* bitsize */
238 FALSE, /* pc_relative */
239 0, /* bitpos */
240 complain_overflow_bitfield, /* complain_on_overflow */
241 bfd_elf_generic_reloc, /* special_function */
242 "R_PPC64_ADDR32", /* name */
243 FALSE, /* partial_inplace */
244 0, /* src_mask */
245 0xffffffff, /* dst_mask */
246 FALSE), /* pcrel_offset */
247
248 /* An absolute 26 bit branch; the lower two bits must be zero.
249 FIXME: we don't check that, we just clear them. */
250 HOWTO (R_PPC64_ADDR24, /* type */
251 0, /* rightshift */
252 2, /* size (0 = byte, 1 = short, 2 = long) */
253 26, /* bitsize */
254 FALSE, /* pc_relative */
255 0, /* bitpos */
256 complain_overflow_bitfield, /* complain_on_overflow */
257 bfd_elf_generic_reloc, /* special_function */
258 "R_PPC64_ADDR24", /* name */
259 FALSE, /* partial_inplace */
260 0, /* src_mask */
261 0x03fffffc, /* dst_mask */
262 FALSE), /* pcrel_offset */
263
264 /* A standard 16 bit relocation. */
265 HOWTO (R_PPC64_ADDR16, /* type */
266 0, /* rightshift */
267 1, /* size (0 = byte, 1 = short, 2 = long) */
268 16, /* bitsize */
269 FALSE, /* pc_relative */
270 0, /* bitpos */
271 complain_overflow_bitfield, /* complain_on_overflow */
272 bfd_elf_generic_reloc, /* special_function */
273 "R_PPC64_ADDR16", /* name */
274 FALSE, /* partial_inplace */
275 0, /* src_mask */
276 0xffff, /* dst_mask */
277 FALSE), /* pcrel_offset */
278
279 /* A 16 bit relocation without overflow. */
280 HOWTO (R_PPC64_ADDR16_LO, /* type */
281 0, /* rightshift */
282 1, /* size (0 = byte, 1 = short, 2 = long) */
283 16, /* bitsize */
284 FALSE, /* pc_relative */
285 0, /* bitpos */
286 complain_overflow_dont,/* complain_on_overflow */
287 bfd_elf_generic_reloc, /* special_function */
288 "R_PPC64_ADDR16_LO", /* name */
289 FALSE, /* partial_inplace */
290 0, /* src_mask */
291 0xffff, /* dst_mask */
292 FALSE), /* pcrel_offset */
293
294 /* Bits 16-31 of an address. */
295 HOWTO (R_PPC64_ADDR16_HI, /* type */
296 16, /* rightshift */
297 1, /* size (0 = byte, 1 = short, 2 = long) */
298 16, /* bitsize */
299 FALSE, /* pc_relative */
300 0, /* bitpos */
301 complain_overflow_dont, /* complain_on_overflow */
302 bfd_elf_generic_reloc, /* special_function */
303 "R_PPC64_ADDR16_HI", /* name */
304 FALSE, /* partial_inplace */
305 0, /* src_mask */
306 0xffff, /* dst_mask */
307 FALSE), /* pcrel_offset */
308
309 /* Bits 16-31 of an address, plus 1 if the contents of the low 16
310 bits, treated as a signed number, is negative. */
311 HOWTO (R_PPC64_ADDR16_HA, /* type */
312 16, /* rightshift */
313 1, /* size (0 = byte, 1 = short, 2 = long) */
314 16, /* bitsize */
315 FALSE, /* pc_relative */
316 0, /* bitpos */
317 complain_overflow_dont, /* complain_on_overflow */
318 ppc64_elf_ha_reloc, /* special_function */
319 "R_PPC64_ADDR16_HA", /* name */
320 FALSE, /* partial_inplace */
321 0, /* src_mask */
322 0xffff, /* dst_mask */
323 FALSE), /* pcrel_offset */
324
325 /* An absolute 16 bit branch; the lower two bits must be zero.
326 FIXME: we don't check that, we just clear them. */
327 HOWTO (R_PPC64_ADDR14, /* type */
328 0, /* rightshift */
329 2, /* size (0 = byte, 1 = short, 2 = long) */
330 16, /* bitsize */
331 FALSE, /* pc_relative */
332 0, /* bitpos */
333 complain_overflow_bitfield, /* complain_on_overflow */
334 ppc64_elf_branch_reloc, /* special_function */
335 "R_PPC64_ADDR14", /* name */
336 FALSE, /* partial_inplace */
337 0, /* src_mask */
338 0x0000fffc, /* dst_mask */
339 FALSE), /* pcrel_offset */
340
341 /* An absolute 16 bit branch, for which bit 10 should be set to
342 indicate that the branch is expected to be taken. The lower two
343 bits must be zero. */
344 HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */
345 0, /* rightshift */
346 2, /* size (0 = byte, 1 = short, 2 = long) */
347 16, /* bitsize */
348 FALSE, /* pc_relative */
349 0, /* bitpos */
350 complain_overflow_bitfield, /* complain_on_overflow */
351 ppc64_elf_brtaken_reloc, /* special_function */
352 "R_PPC64_ADDR14_BRTAKEN",/* name */
353 FALSE, /* partial_inplace */
354 0, /* src_mask */
355 0x0000fffc, /* dst_mask */
356 FALSE), /* pcrel_offset */
357
358 /* An absolute 16 bit branch, for which bit 10 should be set to
359 indicate that the branch is not expected to be taken. The lower
360 two bits must be zero. */
361 HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */
362 0, /* rightshift */
363 2, /* size (0 = byte, 1 = short, 2 = long) */
364 16, /* bitsize */
365 FALSE, /* pc_relative */
366 0, /* bitpos */
367 complain_overflow_bitfield, /* complain_on_overflow */
368 ppc64_elf_brtaken_reloc, /* special_function */
369 "R_PPC64_ADDR14_BRNTAKEN",/* name */
370 FALSE, /* partial_inplace */
371 0, /* src_mask */
372 0x0000fffc, /* dst_mask */
373 FALSE), /* pcrel_offset */
374
375 /* A relative 26 bit branch; the lower two bits must be zero. */
376 HOWTO (R_PPC64_REL24, /* type */
377 0, /* rightshift */
378 2, /* size (0 = byte, 1 = short, 2 = long) */
379 26, /* bitsize */
380 TRUE, /* pc_relative */
381 0, /* bitpos */
382 complain_overflow_signed, /* complain_on_overflow */
383 ppc64_elf_branch_reloc, /* special_function */
384 "R_PPC64_REL24", /* name */
385 FALSE, /* partial_inplace */
386 0, /* src_mask */
387 0x03fffffc, /* dst_mask */
388 TRUE), /* pcrel_offset */
389
390 /* A relative 16 bit branch; the lower two bits must be zero. */
391 HOWTO (R_PPC64_REL14, /* type */
392 0, /* rightshift */
393 2, /* size (0 = byte, 1 = short, 2 = long) */
394 16, /* bitsize */
395 TRUE, /* pc_relative */
396 0, /* bitpos */
397 complain_overflow_signed, /* complain_on_overflow */
398 ppc64_elf_branch_reloc, /* special_function */
399 "R_PPC64_REL14", /* name */
400 FALSE, /* partial_inplace */
401 0, /* src_mask */
402 0x0000fffc, /* dst_mask */
403 TRUE), /* pcrel_offset */
404
405 /* A relative 16 bit branch. Bit 10 should be set to indicate that
406 the branch is expected to be taken. The lower two bits must be
407 zero. */
408 HOWTO (R_PPC64_REL14_BRTAKEN, /* type */
409 0, /* rightshift */
410 2, /* size (0 = byte, 1 = short, 2 = long) */
411 16, /* bitsize */
412 TRUE, /* pc_relative */
413 0, /* bitpos */
414 complain_overflow_signed, /* complain_on_overflow */
415 ppc64_elf_brtaken_reloc, /* special_function */
416 "R_PPC64_REL14_BRTAKEN", /* name */
417 FALSE, /* partial_inplace */
418 0, /* src_mask */
419 0x0000fffc, /* dst_mask */
420 TRUE), /* pcrel_offset */
421
422 /* A relative 16 bit branch. Bit 10 should be set to indicate that
423 the branch is not expected to be taken. The lower two bits must
424 be zero. */
425 HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */
426 0, /* rightshift */
427 2, /* size (0 = byte, 1 = short, 2 = long) */
428 16, /* bitsize */
429 TRUE, /* pc_relative */
430 0, /* bitpos */
431 complain_overflow_signed, /* complain_on_overflow */
432 ppc64_elf_brtaken_reloc, /* special_function */
433 "R_PPC64_REL14_BRNTAKEN",/* name */
434 FALSE, /* partial_inplace */
435 0, /* src_mask */
436 0x0000fffc, /* dst_mask */
437 TRUE), /* pcrel_offset */
438
439 /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
440 symbol. */
441 HOWTO (R_PPC64_GOT16, /* type */
442 0, /* rightshift */
443 1, /* size (0 = byte, 1 = short, 2 = long) */
444 16, /* bitsize */
445 FALSE, /* pc_relative */
446 0, /* bitpos */
447 complain_overflow_signed, /* complain_on_overflow */
448 ppc64_elf_unhandled_reloc, /* special_function */
449 "R_PPC64_GOT16", /* name */
450 FALSE, /* partial_inplace */
451 0, /* src_mask */
452 0xffff, /* dst_mask */
453 FALSE), /* pcrel_offset */
454
455 /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
456 the symbol. */
457 HOWTO (R_PPC64_GOT16_LO, /* type */
458 0, /* rightshift */
459 1, /* size (0 = byte, 1 = short, 2 = long) */
460 16, /* bitsize */
461 FALSE, /* pc_relative */
462 0, /* bitpos */
463 complain_overflow_dont, /* complain_on_overflow */
464 ppc64_elf_unhandled_reloc, /* special_function */
465 "R_PPC64_GOT16_LO", /* name */
466 FALSE, /* partial_inplace */
467 0, /* src_mask */
468 0xffff, /* dst_mask */
469 FALSE), /* pcrel_offset */
470
471 /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
472 the symbol. */
473 HOWTO (R_PPC64_GOT16_HI, /* type */
474 16, /* rightshift */
475 1, /* size (0 = byte, 1 = short, 2 = long) */
476 16, /* bitsize */
477 FALSE, /* pc_relative */
478 0, /* bitpos */
479 complain_overflow_dont,/* complain_on_overflow */
480 ppc64_elf_unhandled_reloc, /* special_function */
481 "R_PPC64_GOT16_HI", /* name */
482 FALSE, /* partial_inplace */
483 0, /* src_mask */
484 0xffff, /* dst_mask */
485 FALSE), /* pcrel_offset */
486
487 /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
488 the symbol. */
489 HOWTO (R_PPC64_GOT16_HA, /* type */
490 16, /* rightshift */
491 1, /* size (0 = byte, 1 = short, 2 = long) */
492 16, /* bitsize */
493 FALSE, /* pc_relative */
494 0, /* bitpos */
495 complain_overflow_dont,/* complain_on_overflow */
496 ppc64_elf_unhandled_reloc, /* special_function */
497 "R_PPC64_GOT16_HA", /* name */
498 FALSE, /* partial_inplace */
499 0, /* src_mask */
500 0xffff, /* dst_mask */
501 FALSE), /* pcrel_offset */
502
503 /* This is used only by the dynamic linker. The symbol should exist
504 both in the object being run and in some shared library. The
505 dynamic linker copies the data addressed by the symbol from the
506 shared library into the object, because the object being
507 run has to have the data at some particular address. */
508 HOWTO (R_PPC64_COPY, /* type */
509 0, /* rightshift */
510 0, /* this one is variable size */
511 0, /* bitsize */
512 FALSE, /* pc_relative */
513 0, /* bitpos */
514 complain_overflow_dont, /* complain_on_overflow */
515 ppc64_elf_unhandled_reloc, /* special_function */
516 "R_PPC64_COPY", /* name */
517 FALSE, /* partial_inplace */
518 0, /* src_mask */
519 0, /* dst_mask */
520 FALSE), /* pcrel_offset */
521
522 /* Like R_PPC64_ADDR64, but used when setting global offset table
523 entries. */
524 HOWTO (R_PPC64_GLOB_DAT, /* type */
525 0, /* rightshift */
526 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
527 64, /* bitsize */
528 FALSE, /* pc_relative */
529 0, /* bitpos */
530 complain_overflow_dont, /* complain_on_overflow */
531 ppc64_elf_unhandled_reloc, /* special_function */
532 "R_PPC64_GLOB_DAT", /* name */
533 FALSE, /* partial_inplace */
534 0, /* src_mask */
535 ONES (64), /* dst_mask */
536 FALSE), /* pcrel_offset */
537
538 /* Created by the link editor. Marks a procedure linkage table
539 entry for a symbol. */
540 HOWTO (R_PPC64_JMP_SLOT, /* type */
541 0, /* rightshift */
542 0, /* size (0 = byte, 1 = short, 2 = long) */
543 0, /* bitsize */
544 FALSE, /* pc_relative */
545 0, /* bitpos */
546 complain_overflow_dont, /* complain_on_overflow */
547 ppc64_elf_unhandled_reloc, /* special_function */
548 "R_PPC64_JMP_SLOT", /* name */
549 FALSE, /* partial_inplace */
550 0, /* src_mask */
551 0, /* dst_mask */
552 FALSE), /* pcrel_offset */
553
554 /* Used only by the dynamic linker. When the object is run, this
555 doubleword64 is set to the load address of the object, plus the
556 addend. */
557 HOWTO (R_PPC64_RELATIVE, /* type */
558 0, /* rightshift */
559 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
560 64, /* bitsize */
561 FALSE, /* pc_relative */
562 0, /* bitpos */
563 complain_overflow_dont, /* complain_on_overflow */
564 bfd_elf_generic_reloc, /* special_function */
565 "R_PPC64_RELATIVE", /* name */
566 FALSE, /* partial_inplace */
567 0, /* src_mask */
568 ONES (64), /* dst_mask */
569 FALSE), /* pcrel_offset */
570
571 /* Like R_PPC64_ADDR32, but may be unaligned. */
572 HOWTO (R_PPC64_UADDR32, /* type */
573 0, /* rightshift */
574 2, /* size (0 = byte, 1 = short, 2 = long) */
575 32, /* bitsize */
576 FALSE, /* pc_relative */
577 0, /* bitpos */
578 complain_overflow_bitfield, /* complain_on_overflow */
579 bfd_elf_generic_reloc, /* special_function */
580 "R_PPC64_UADDR32", /* name */
581 FALSE, /* partial_inplace */
582 0, /* src_mask */
583 0xffffffff, /* dst_mask */
584 FALSE), /* pcrel_offset */
585
586 /* Like R_PPC64_ADDR16, but may be unaligned. */
587 HOWTO (R_PPC64_UADDR16, /* type */
588 0, /* rightshift */
589 1, /* size (0 = byte, 1 = short, 2 = long) */
590 16, /* bitsize */
591 FALSE, /* pc_relative */
592 0, /* bitpos */
593 complain_overflow_bitfield, /* complain_on_overflow */
594 bfd_elf_generic_reloc, /* special_function */
595 "R_PPC64_UADDR16", /* name */
596 FALSE, /* partial_inplace */
597 0, /* src_mask */
598 0xffff, /* dst_mask */
599 FALSE), /* pcrel_offset */
600
601 /* 32-bit PC relative. */
602 HOWTO (R_PPC64_REL32, /* type */
603 0, /* rightshift */
604 2, /* size (0 = byte, 1 = short, 2 = long) */
605 32, /* bitsize */
606 TRUE, /* pc_relative */
607 0, /* bitpos */
608 /* FIXME: Verify. Was complain_overflow_bitfield. */
609 complain_overflow_signed, /* complain_on_overflow */
610 bfd_elf_generic_reloc, /* special_function */
611 "R_PPC64_REL32", /* name */
612 FALSE, /* partial_inplace */
613 0, /* src_mask */
614 0xffffffff, /* dst_mask */
615 TRUE), /* pcrel_offset */
616
617 /* 32-bit relocation to the symbol's procedure linkage table. */
618 HOWTO (R_PPC64_PLT32, /* type */
619 0, /* rightshift */
620 2, /* size (0 = byte, 1 = short, 2 = long) */
621 32, /* bitsize */
622 FALSE, /* pc_relative */
623 0, /* bitpos */
624 complain_overflow_bitfield, /* complain_on_overflow */
625 ppc64_elf_unhandled_reloc, /* special_function */
626 "R_PPC64_PLT32", /* name */
627 FALSE, /* partial_inplace */
628 0, /* src_mask */
629 0xffffffff, /* dst_mask */
630 FALSE), /* pcrel_offset */
631
632 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
633 FIXME: R_PPC64_PLTREL32 not supported. */
634 HOWTO (R_PPC64_PLTREL32, /* type */
635 0, /* rightshift */
636 2, /* size (0 = byte, 1 = short, 2 = long) */
637 32, /* bitsize */
638 TRUE, /* pc_relative */
639 0, /* bitpos */
640 complain_overflow_signed, /* complain_on_overflow */
641 bfd_elf_generic_reloc, /* special_function */
642 "R_PPC64_PLTREL32", /* name */
643 FALSE, /* partial_inplace */
644 0, /* src_mask */
645 0xffffffff, /* dst_mask */
646 TRUE), /* pcrel_offset */
647
648 /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
649 the symbol. */
650 HOWTO (R_PPC64_PLT16_LO, /* type */
651 0, /* rightshift */
652 1, /* size (0 = byte, 1 = short, 2 = long) */
653 16, /* bitsize */
654 FALSE, /* pc_relative */
655 0, /* bitpos */
656 complain_overflow_dont, /* complain_on_overflow */
657 ppc64_elf_unhandled_reloc, /* special_function */
658 "R_PPC64_PLT16_LO", /* name */
659 FALSE, /* partial_inplace */
660 0, /* src_mask */
661 0xffff, /* dst_mask */
662 FALSE), /* pcrel_offset */
663
664 /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
665 the symbol. */
666 HOWTO (R_PPC64_PLT16_HI, /* type */
667 16, /* rightshift */
668 1, /* size (0 = byte, 1 = short, 2 = long) */
669 16, /* bitsize */
670 FALSE, /* pc_relative */
671 0, /* bitpos */
672 complain_overflow_dont, /* complain_on_overflow */
673 ppc64_elf_unhandled_reloc, /* special_function */
674 "R_PPC64_PLT16_HI", /* name */
675 FALSE, /* partial_inplace */
676 0, /* src_mask */
677 0xffff, /* dst_mask */
678 FALSE), /* pcrel_offset */
679
680 /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
681 the symbol. */
682 HOWTO (R_PPC64_PLT16_HA, /* type */
683 16, /* rightshift */
684 1, /* size (0 = byte, 1 = short, 2 = long) */
685 16, /* bitsize */
686 FALSE, /* pc_relative */
687 0, /* bitpos */
688 complain_overflow_dont, /* complain_on_overflow */
689 ppc64_elf_unhandled_reloc, /* special_function */
690 "R_PPC64_PLT16_HA", /* name */
691 FALSE, /* partial_inplace */
692 0, /* src_mask */
693 0xffff, /* dst_mask */
694 FALSE), /* pcrel_offset */
695
696 /* 16-bit section relative relocation. */
697 HOWTO (R_PPC64_SECTOFF, /* type */
698 0, /* rightshift */
699 1, /* size (0 = byte, 1 = short, 2 = long) */
700 16, /* bitsize */
701 FALSE, /* pc_relative */
702 0, /* bitpos */
703 complain_overflow_bitfield, /* complain_on_overflow */
704 ppc64_elf_sectoff_reloc, /* special_function */
705 "R_PPC64_SECTOFF", /* name */
706 FALSE, /* partial_inplace */
707 0, /* src_mask */
708 0xffff, /* dst_mask */
709 FALSE), /* pcrel_offset */
710
711 /* Like R_PPC64_SECTOFF, but no overflow warning. */
712 HOWTO (R_PPC64_SECTOFF_LO, /* type */
713 0, /* rightshift */
714 1, /* size (0 = byte, 1 = short, 2 = long) */
715 16, /* bitsize */
716 FALSE, /* pc_relative */
717 0, /* bitpos */
718 complain_overflow_dont, /* complain_on_overflow */
719 ppc64_elf_sectoff_reloc, /* special_function */
720 "R_PPC64_SECTOFF_LO", /* name */
721 FALSE, /* partial_inplace */
722 0, /* src_mask */
723 0xffff, /* dst_mask */
724 FALSE), /* pcrel_offset */
725
726 /* 16-bit upper half section relative relocation. */
727 HOWTO (R_PPC64_SECTOFF_HI, /* type */
728 16, /* rightshift */
729 1, /* size (0 = byte, 1 = short, 2 = long) */
730 16, /* bitsize */
731 FALSE, /* pc_relative */
732 0, /* bitpos */
733 complain_overflow_dont, /* complain_on_overflow */
734 ppc64_elf_sectoff_reloc, /* special_function */
735 "R_PPC64_SECTOFF_HI", /* name */
736 FALSE, /* partial_inplace */
737 0, /* src_mask */
738 0xffff, /* dst_mask */
739 FALSE), /* pcrel_offset */
740
741 /* 16-bit upper half adjusted section relative relocation. */
742 HOWTO (R_PPC64_SECTOFF_HA, /* type */
743 16, /* rightshift */
744 1, /* size (0 = byte, 1 = short, 2 = long) */
745 16, /* bitsize */
746 FALSE, /* pc_relative */
747 0, /* bitpos */
748 complain_overflow_dont, /* complain_on_overflow */
749 ppc64_elf_sectoff_ha_reloc, /* special_function */
750 "R_PPC64_SECTOFF_HA", /* name */
751 FALSE, /* partial_inplace */
752 0, /* src_mask */
753 0xffff, /* dst_mask */
754 FALSE), /* pcrel_offset */
755
756 /* Like R_PPC64_REL24 without touching the two least significant bits. */
757 HOWTO (R_PPC64_REL30, /* type */
758 2, /* rightshift */
759 2, /* size (0 = byte, 1 = short, 2 = long) */
760 30, /* bitsize */
761 TRUE, /* pc_relative */
762 0, /* bitpos */
763 complain_overflow_dont, /* complain_on_overflow */
764 bfd_elf_generic_reloc, /* special_function */
765 "R_PPC64_REL30", /* name */
766 FALSE, /* partial_inplace */
767 0, /* src_mask */
768 0xfffffffc, /* dst_mask */
769 TRUE), /* pcrel_offset */
770
771 /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
772
773 /* A standard 64-bit relocation. */
774 HOWTO (R_PPC64_ADDR64, /* type */
775 0, /* rightshift */
776 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
777 64, /* bitsize */
778 FALSE, /* pc_relative */
779 0, /* bitpos */
780 complain_overflow_dont, /* complain_on_overflow */
781 bfd_elf_generic_reloc, /* special_function */
782 "R_PPC64_ADDR64", /* name */
783 FALSE, /* partial_inplace */
784 0, /* src_mask */
785 ONES (64), /* dst_mask */
786 FALSE), /* pcrel_offset */
787
788 /* The bits 32-47 of an address. */
789 HOWTO (R_PPC64_ADDR16_HIGHER, /* type */
790 32, /* rightshift */
791 1, /* size (0 = byte, 1 = short, 2 = long) */
792 16, /* bitsize */
793 FALSE, /* pc_relative */
794 0, /* bitpos */
795 complain_overflow_dont, /* complain_on_overflow */
796 bfd_elf_generic_reloc, /* special_function */
797 "R_PPC64_ADDR16_HIGHER", /* name */
798 FALSE, /* partial_inplace */
799 0, /* src_mask */
800 0xffff, /* dst_mask */
801 FALSE), /* pcrel_offset */
802
803 /* The bits 32-47 of an address, plus 1 if the contents of the low
804 16 bits, treated as a signed number, is negative. */
805 HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */
806 32, /* rightshift */
807 1, /* size (0 = byte, 1 = short, 2 = long) */
808 16, /* bitsize */
809 FALSE, /* pc_relative */
810 0, /* bitpos */
811 complain_overflow_dont, /* complain_on_overflow */
812 ppc64_elf_ha_reloc, /* special_function */
813 "R_PPC64_ADDR16_HIGHERA", /* name */
814 FALSE, /* partial_inplace */
815 0, /* src_mask */
816 0xffff, /* dst_mask */
817 FALSE), /* pcrel_offset */
818
819 /* The bits 48-63 of an address. */
820 HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */
821 48, /* rightshift */
822 1, /* size (0 = byte, 1 = short, 2 = long) */
823 16, /* bitsize */
824 FALSE, /* pc_relative */
825 0, /* bitpos */
826 complain_overflow_dont, /* complain_on_overflow */
827 bfd_elf_generic_reloc, /* special_function */
828 "R_PPC64_ADDR16_HIGHEST", /* name */
829 FALSE, /* partial_inplace */
830 0, /* src_mask */
831 0xffff, /* dst_mask */
832 FALSE), /* pcrel_offset */
833
834 /* The bits 48-63 of an address, plus 1 if the contents of the low
835 16 bits, treated as a signed number, is negative. */
836 HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */
837 48, /* rightshift */
838 1, /* size (0 = byte, 1 = short, 2 = long) */
839 16, /* bitsize */
840 FALSE, /* pc_relative */
841 0, /* bitpos */
842 complain_overflow_dont, /* complain_on_overflow */
843 ppc64_elf_ha_reloc, /* special_function */
844 "R_PPC64_ADDR16_HIGHESTA", /* name */
845 FALSE, /* partial_inplace */
846 0, /* src_mask */
847 0xffff, /* dst_mask */
848 FALSE), /* pcrel_offset */
849
850 /* Like ADDR64, but may be unaligned. */
851 HOWTO (R_PPC64_UADDR64, /* type */
852 0, /* rightshift */
853 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
854 64, /* bitsize */
855 FALSE, /* pc_relative */
856 0, /* bitpos */
857 complain_overflow_dont, /* complain_on_overflow */
858 bfd_elf_generic_reloc, /* special_function */
859 "R_PPC64_UADDR64", /* name */
860 FALSE, /* partial_inplace */
861 0, /* src_mask */
862 ONES (64), /* dst_mask */
863 FALSE), /* pcrel_offset */
864
865 /* 64-bit relative relocation. */
866 HOWTO (R_PPC64_REL64, /* type */
867 0, /* rightshift */
868 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
869 64, /* bitsize */
870 TRUE, /* pc_relative */
871 0, /* bitpos */
872 complain_overflow_dont, /* complain_on_overflow */
873 bfd_elf_generic_reloc, /* special_function */
874 "R_PPC64_REL64", /* name */
875 FALSE, /* partial_inplace */
876 0, /* src_mask */
877 ONES (64), /* dst_mask */
878 TRUE), /* pcrel_offset */
879
880 /* 64-bit relocation to the symbol's procedure linkage table. */
881 HOWTO (R_PPC64_PLT64, /* type */
882 0, /* rightshift */
883 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
884 64, /* bitsize */
885 FALSE, /* pc_relative */
886 0, /* bitpos */
887 complain_overflow_dont, /* complain_on_overflow */
888 ppc64_elf_unhandled_reloc, /* special_function */
889 "R_PPC64_PLT64", /* name */
890 FALSE, /* partial_inplace */
891 0, /* src_mask */
892 ONES (64), /* dst_mask */
893 FALSE), /* pcrel_offset */
894
895 /* 64-bit PC relative relocation to the symbol's procedure linkage
896 table. */
897 /* FIXME: R_PPC64_PLTREL64 not supported. */
898 HOWTO (R_PPC64_PLTREL64, /* type */
899 0, /* rightshift */
900 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
901 64, /* bitsize */
902 TRUE, /* pc_relative */
903 0, /* bitpos */
904 complain_overflow_dont, /* complain_on_overflow */
905 ppc64_elf_unhandled_reloc, /* special_function */
906 "R_PPC64_PLTREL64", /* name */
907 FALSE, /* partial_inplace */
908 0, /* src_mask */
909 ONES (64), /* dst_mask */
910 TRUE), /* pcrel_offset */
911
912 /* 16 bit TOC-relative relocation. */
913
914 /* R_PPC64_TOC16 47 half16* S + A - .TOC. */
915 HOWTO (R_PPC64_TOC16, /* type */
916 0, /* rightshift */
917 1, /* size (0 = byte, 1 = short, 2 = long) */
918 16, /* bitsize */
919 FALSE, /* pc_relative */
920 0, /* bitpos */
921 complain_overflow_signed, /* complain_on_overflow */
922 ppc64_elf_toc_reloc, /* special_function */
923 "R_PPC64_TOC16", /* name */
924 FALSE, /* partial_inplace */
925 0, /* src_mask */
926 0xffff, /* dst_mask */
927 FALSE), /* pcrel_offset */
928
929 /* 16 bit TOC-relative relocation without overflow. */
930
931 /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
932 HOWTO (R_PPC64_TOC16_LO, /* type */
933 0, /* rightshift */
934 1, /* size (0 = byte, 1 = short, 2 = long) */
935 16, /* bitsize */
936 FALSE, /* pc_relative */
937 0, /* bitpos */
938 complain_overflow_dont, /* complain_on_overflow */
939 ppc64_elf_toc_reloc, /* special_function */
940 "R_PPC64_TOC16_LO", /* name */
941 FALSE, /* partial_inplace */
942 0, /* src_mask */
943 0xffff, /* dst_mask */
944 FALSE), /* pcrel_offset */
945
946 /* 16 bit TOC-relative relocation, high 16 bits. */
947
948 /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
949 HOWTO (R_PPC64_TOC16_HI, /* type */
950 16, /* rightshift */
951 1, /* size (0 = byte, 1 = short, 2 = long) */
952 16, /* bitsize */
953 FALSE, /* pc_relative */
954 0, /* bitpos */
955 complain_overflow_dont, /* complain_on_overflow */
956 ppc64_elf_toc_reloc, /* special_function */
957 "R_PPC64_TOC16_HI", /* name */
958 FALSE, /* partial_inplace */
959 0, /* src_mask */
960 0xffff, /* dst_mask */
961 FALSE), /* pcrel_offset */
962
963 /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the
964 contents of the low 16 bits, treated as a signed number, is
965 negative. */
966
967 /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
968 HOWTO (R_PPC64_TOC16_HA, /* type */
969 16, /* rightshift */
970 1, /* size (0 = byte, 1 = short, 2 = long) */
971 16, /* bitsize */
972 FALSE, /* pc_relative */
973 0, /* bitpos */
974 complain_overflow_dont, /* complain_on_overflow */
975 ppc64_elf_toc_ha_reloc, /* special_function */
976 "R_PPC64_TOC16_HA", /* name */
977 FALSE, /* partial_inplace */
978 0, /* src_mask */
979 0xffff, /* dst_mask */
980 FALSE), /* pcrel_offset */
981
982 /* 64-bit relocation; insert value of TOC base (.TOC.). */
983
984 /* R_PPC64_TOC 51 doubleword64 .TOC. */
985 HOWTO (R_PPC64_TOC, /* type */
986 0, /* rightshift */
987 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
988 64, /* bitsize */
989 FALSE, /* pc_relative */
990 0, /* bitpos */
991 complain_overflow_bitfield, /* complain_on_overflow */
992 ppc64_elf_toc64_reloc, /* special_function */
993 "R_PPC64_TOC", /* name */
994 FALSE, /* partial_inplace */
995 0, /* src_mask */
996 ONES (64), /* dst_mask */
997 FALSE), /* pcrel_offset */
998
999 /* Like R_PPC64_GOT16, but also informs the link editor that the
1000 value to relocate may (!) refer to a PLT entry which the link
1001 editor (a) may replace with the symbol value. If the link editor
1002 is unable to fully resolve the symbol, it may (b) create a PLT
1003 entry and store the address to the new PLT entry in the GOT.
1004 This permits lazy resolution of function symbols at run time.
1005 The link editor may also skip all of this and just (c) emit a
1006 R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
1007 /* FIXME: R_PPC64_PLTGOT16 not implemented. */
1008 HOWTO (R_PPC64_PLTGOT16, /* type */
1009 0, /* rightshift */
1010 1, /* size (0 = byte, 1 = short, 2 = long) */
1011 16, /* bitsize */
1012 FALSE, /* pc_relative */
1013 0, /* bitpos */
1014 complain_overflow_signed, /* complain_on_overflow */
1015 ppc64_elf_unhandled_reloc, /* special_function */
1016 "R_PPC64_PLTGOT16", /* name */
1017 FALSE, /* partial_inplace */
1018 0, /* src_mask */
1019 0xffff, /* dst_mask */
1020 FALSE), /* pcrel_offset */
1021
1022 /* Like R_PPC64_PLTGOT16, but without overflow. */
1023 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1024 HOWTO (R_PPC64_PLTGOT16_LO, /* type */
1025 0, /* rightshift */
1026 1, /* size (0 = byte, 1 = short, 2 = long) */
1027 16, /* bitsize */
1028 FALSE, /* pc_relative */
1029 0, /* bitpos */
1030 complain_overflow_dont, /* complain_on_overflow */
1031 ppc64_elf_unhandled_reloc, /* special_function */
1032 "R_PPC64_PLTGOT16_LO", /* name */
1033 FALSE, /* partial_inplace */
1034 0, /* src_mask */
1035 0xffff, /* dst_mask */
1036 FALSE), /* pcrel_offset */
1037
1038 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */
1039 /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */
1040 HOWTO (R_PPC64_PLTGOT16_HI, /* type */
1041 16, /* rightshift */
1042 1, /* size (0 = byte, 1 = short, 2 = long) */
1043 16, /* bitsize */
1044 FALSE, /* pc_relative */
1045 0, /* bitpos */
1046 complain_overflow_dont, /* complain_on_overflow */
1047 ppc64_elf_unhandled_reloc, /* special_function */
1048 "R_PPC64_PLTGOT16_HI", /* name */
1049 FALSE, /* partial_inplace */
1050 0, /* src_mask */
1051 0xffff, /* dst_mask */
1052 FALSE), /* pcrel_offset */
1053
1054 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus
1055 1 if the contents of the low 16 bits, treated as a signed number,
1056 is negative. */
1057 /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */
1058 HOWTO (R_PPC64_PLTGOT16_HA, /* type */
1059 16, /* rightshift */
1060 1, /* size (0 = byte, 1 = short, 2 = long) */
1061 16, /* bitsize */
1062 FALSE, /* pc_relative */
1063 0, /* bitpos */
1064 complain_overflow_dont,/* complain_on_overflow */
1065 ppc64_elf_unhandled_reloc, /* special_function */
1066 "R_PPC64_PLTGOT16_HA", /* name */
1067 FALSE, /* partial_inplace */
1068 0, /* src_mask */
1069 0xffff, /* dst_mask */
1070 FALSE), /* pcrel_offset */
1071
1072 /* Like R_PPC64_ADDR16, but for instructions with a DS field. */
1073 HOWTO (R_PPC64_ADDR16_DS, /* type */
1074 0, /* rightshift */
1075 1, /* size (0 = byte, 1 = short, 2 = long) */
1076 16, /* bitsize */
1077 FALSE, /* pc_relative */
1078 0, /* bitpos */
1079 complain_overflow_bitfield, /* complain_on_overflow */
1080 bfd_elf_generic_reloc, /* special_function */
1081 "R_PPC64_ADDR16_DS", /* name */
1082 FALSE, /* partial_inplace */
1083 0, /* src_mask */
1084 0xfffc, /* dst_mask */
1085 FALSE), /* pcrel_offset */
1086
1087 /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
1088 HOWTO (R_PPC64_ADDR16_LO_DS, /* type */
1089 0, /* rightshift */
1090 1, /* size (0 = byte, 1 = short, 2 = long) */
1091 16, /* bitsize */
1092 FALSE, /* pc_relative */
1093 0, /* bitpos */
1094 complain_overflow_dont,/* complain_on_overflow */
1095 bfd_elf_generic_reloc, /* special_function */
1096 "R_PPC64_ADDR16_LO_DS",/* name */
1097 FALSE, /* partial_inplace */
1098 0, /* src_mask */
1099 0xfffc, /* dst_mask */
1100 FALSE), /* pcrel_offset */
1101
1102 /* Like R_PPC64_GOT16, but for instructions with a DS field. */
1103 HOWTO (R_PPC64_GOT16_DS, /* type */
1104 0, /* rightshift */
1105 1, /* size (0 = byte, 1 = short, 2 = long) */
1106 16, /* bitsize */
1107 FALSE, /* pc_relative */
1108 0, /* bitpos */
1109 complain_overflow_signed, /* complain_on_overflow */
1110 ppc64_elf_unhandled_reloc, /* special_function */
1111 "R_PPC64_GOT16_DS", /* name */
1112 FALSE, /* partial_inplace */
1113 0, /* src_mask */
1114 0xfffc, /* dst_mask */
1115 FALSE), /* pcrel_offset */
1116
1117 /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
1118 HOWTO (R_PPC64_GOT16_LO_DS, /* type */
1119 0, /* rightshift */
1120 1, /* size (0 = byte, 1 = short, 2 = long) */
1121 16, /* bitsize */
1122 FALSE, /* pc_relative */
1123 0, /* bitpos */
1124 complain_overflow_dont, /* complain_on_overflow */
1125 ppc64_elf_unhandled_reloc, /* special_function */
1126 "R_PPC64_GOT16_LO_DS", /* name */
1127 FALSE, /* partial_inplace */
1128 0, /* src_mask */
1129 0xfffc, /* dst_mask */
1130 FALSE), /* pcrel_offset */
1131
1132 /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
1133 HOWTO (R_PPC64_PLT16_LO_DS, /* type */
1134 0, /* rightshift */
1135 1, /* size (0 = byte, 1 = short, 2 = long) */
1136 16, /* bitsize */
1137 FALSE, /* pc_relative */
1138 0, /* bitpos */
1139 complain_overflow_dont, /* complain_on_overflow */
1140 ppc64_elf_unhandled_reloc, /* special_function */
1141 "R_PPC64_PLT16_LO_DS", /* name */
1142 FALSE, /* partial_inplace */
1143 0, /* src_mask */
1144 0xfffc, /* dst_mask */
1145 FALSE), /* pcrel_offset */
1146
1147 /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
1148 HOWTO (R_PPC64_SECTOFF_DS, /* type */
1149 0, /* rightshift */
1150 1, /* size (0 = byte, 1 = short, 2 = long) */
1151 16, /* bitsize */
1152 FALSE, /* pc_relative */
1153 0, /* bitpos */
1154 complain_overflow_bitfield, /* complain_on_overflow */
1155 ppc64_elf_sectoff_reloc, /* special_function */
1156 "R_PPC64_SECTOFF_DS", /* name */
1157 FALSE, /* partial_inplace */
1158 0, /* src_mask */
1159 0xfffc, /* dst_mask */
1160 FALSE), /* pcrel_offset */
1161
1162 /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
1163 HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */
1164 0, /* rightshift */
1165 1, /* size (0 = byte, 1 = short, 2 = long) */
1166 16, /* bitsize */
1167 FALSE, /* pc_relative */
1168 0, /* bitpos */
1169 complain_overflow_dont, /* complain_on_overflow */
1170 ppc64_elf_sectoff_reloc, /* special_function */
1171 "R_PPC64_SECTOFF_LO_DS",/* name */
1172 FALSE, /* partial_inplace */
1173 0, /* src_mask */
1174 0xfffc, /* dst_mask */
1175 FALSE), /* pcrel_offset */
1176
1177 /* Like R_PPC64_TOC16, but for instructions with a DS field. */
1178 HOWTO (R_PPC64_TOC16_DS, /* type */
1179 0, /* rightshift */
1180 1, /* size (0 = byte, 1 = short, 2 = long) */
1181 16, /* bitsize */
1182 FALSE, /* pc_relative */
1183 0, /* bitpos */
1184 complain_overflow_signed, /* complain_on_overflow */
1185 ppc64_elf_toc_reloc, /* special_function */
1186 "R_PPC64_TOC16_DS", /* name */
1187 FALSE, /* partial_inplace */
1188 0, /* src_mask */
1189 0xfffc, /* dst_mask */
1190 FALSE), /* pcrel_offset */
1191
1192 /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
1193 HOWTO (R_PPC64_TOC16_LO_DS, /* type */
1194 0, /* rightshift */
1195 1, /* size (0 = byte, 1 = short, 2 = long) */
1196 16, /* bitsize */
1197 FALSE, /* pc_relative */
1198 0, /* bitpos */
1199 complain_overflow_dont, /* complain_on_overflow */
1200 ppc64_elf_toc_reloc, /* special_function */
1201 "R_PPC64_TOC16_LO_DS", /* name */
1202 FALSE, /* partial_inplace */
1203 0, /* src_mask */
1204 0xfffc, /* dst_mask */
1205 FALSE), /* pcrel_offset */
1206
1207 /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
1208 /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
1209 HOWTO (R_PPC64_PLTGOT16_DS, /* type */
1210 0, /* rightshift */
1211 1, /* size (0 = byte, 1 = short, 2 = long) */
1212 16, /* bitsize */
1213 FALSE, /* pc_relative */
1214 0, /* bitpos */
1215 complain_overflow_signed, /* complain_on_overflow */
1216 ppc64_elf_unhandled_reloc, /* special_function */
1217 "R_PPC64_PLTGOT16_DS", /* name */
1218 FALSE, /* partial_inplace */
1219 0, /* src_mask */
1220 0xfffc, /* dst_mask */
1221 FALSE), /* pcrel_offset */
1222
1223 /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */
1224 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1225 HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */
1226 0, /* rightshift */
1227 1, /* size (0 = byte, 1 = short, 2 = long) */
1228 16, /* bitsize */
1229 FALSE, /* pc_relative */
1230 0, /* bitpos */
1231 complain_overflow_dont, /* complain_on_overflow */
1232 ppc64_elf_unhandled_reloc, /* special_function */
1233 "R_PPC64_PLTGOT16_LO_DS",/* name */
1234 FALSE, /* partial_inplace */
1235 0, /* src_mask */
1236 0xfffc, /* dst_mask */
1237 FALSE), /* pcrel_offset */
1238
1239 /* Marker relocs for TLS. */
1240 HOWTO (R_PPC64_TLS,
1241 0, /* rightshift */
1242 2, /* size (0 = byte, 1 = short, 2 = long) */
1243 32, /* bitsize */
1244 FALSE, /* pc_relative */
1245 0, /* bitpos */
1246 complain_overflow_dont, /* complain_on_overflow */
1247 bfd_elf_generic_reloc, /* special_function */
1248 "R_PPC64_TLS", /* name */
1249 FALSE, /* partial_inplace */
1250 0, /* src_mask */
1251 0, /* dst_mask */
1252 FALSE), /* pcrel_offset */
1253
1254 HOWTO (R_PPC64_TLSGD,
1255 0, /* rightshift */
1256 2, /* size (0 = byte, 1 = short, 2 = long) */
1257 32, /* bitsize */
1258 FALSE, /* pc_relative */
1259 0, /* bitpos */
1260 complain_overflow_dont, /* complain_on_overflow */
1261 bfd_elf_generic_reloc, /* special_function */
1262 "R_PPC64_TLSGD", /* name */
1263 FALSE, /* partial_inplace */
1264 0, /* src_mask */
1265 0, /* dst_mask */
1266 FALSE), /* pcrel_offset */
1267
1268 HOWTO (R_PPC64_TLSLD,
1269 0, /* rightshift */
1270 2, /* size (0 = byte, 1 = short, 2 = long) */
1271 32, /* bitsize */
1272 FALSE, /* pc_relative */
1273 0, /* bitpos */
1274 complain_overflow_dont, /* complain_on_overflow */
1275 bfd_elf_generic_reloc, /* special_function */
1276 "R_PPC64_TLSLD", /* name */
1277 FALSE, /* partial_inplace */
1278 0, /* src_mask */
1279 0, /* dst_mask */
1280 FALSE), /* pcrel_offset */
1281
1282 /* Computes the load module index of the load module that contains the
1283 definition of its TLS sym. */
1284 HOWTO (R_PPC64_DTPMOD64,
1285 0, /* rightshift */
1286 4, /* size (0 = byte, 1 = short, 2 = long) */
1287 64, /* bitsize */
1288 FALSE, /* pc_relative */
1289 0, /* bitpos */
1290 complain_overflow_dont, /* complain_on_overflow */
1291 ppc64_elf_unhandled_reloc, /* special_function */
1292 "R_PPC64_DTPMOD64", /* name */
1293 FALSE, /* partial_inplace */
1294 0, /* src_mask */
1295 ONES (64), /* dst_mask */
1296 FALSE), /* pcrel_offset */
1297
1298 /* Computes a dtv-relative displacement, the difference between the value
1299 of sym+add and the base address of the thread-local storage block that
1300 contains the definition of sym, minus 0x8000. */
1301 HOWTO (R_PPC64_DTPREL64,
1302 0, /* rightshift */
1303 4, /* size (0 = byte, 1 = short, 2 = long) */
1304 64, /* bitsize */
1305 FALSE, /* pc_relative */
1306 0, /* bitpos */
1307 complain_overflow_dont, /* complain_on_overflow */
1308 ppc64_elf_unhandled_reloc, /* special_function */
1309 "R_PPC64_DTPREL64", /* name */
1310 FALSE, /* partial_inplace */
1311 0, /* src_mask */
1312 ONES (64), /* dst_mask */
1313 FALSE), /* pcrel_offset */
1314
1315 /* A 16 bit dtprel reloc. */
1316 HOWTO (R_PPC64_DTPREL16,
1317 0, /* rightshift */
1318 1, /* size (0 = byte, 1 = short, 2 = long) */
1319 16, /* bitsize */
1320 FALSE, /* pc_relative */
1321 0, /* bitpos */
1322 complain_overflow_signed, /* complain_on_overflow */
1323 ppc64_elf_unhandled_reloc, /* special_function */
1324 "R_PPC64_DTPREL16", /* name */
1325 FALSE, /* partial_inplace */
1326 0, /* src_mask */
1327 0xffff, /* dst_mask */
1328 FALSE), /* pcrel_offset */
1329
1330 /* Like DTPREL16, but no overflow. */
1331 HOWTO (R_PPC64_DTPREL16_LO,
1332 0, /* rightshift */
1333 1, /* size (0 = byte, 1 = short, 2 = long) */
1334 16, /* bitsize */
1335 FALSE, /* pc_relative */
1336 0, /* bitpos */
1337 complain_overflow_dont, /* complain_on_overflow */
1338 ppc64_elf_unhandled_reloc, /* special_function */
1339 "R_PPC64_DTPREL16_LO", /* name */
1340 FALSE, /* partial_inplace */
1341 0, /* src_mask */
1342 0xffff, /* dst_mask */
1343 FALSE), /* pcrel_offset */
1344
1345 /* Like DTPREL16_LO, but next higher group of 16 bits. */
1346 HOWTO (R_PPC64_DTPREL16_HI,
1347 16, /* rightshift */
1348 1, /* size (0 = byte, 1 = short, 2 = long) */
1349 16, /* bitsize */
1350 FALSE, /* pc_relative */
1351 0, /* bitpos */
1352 complain_overflow_dont, /* complain_on_overflow */
1353 ppc64_elf_unhandled_reloc, /* special_function */
1354 "R_PPC64_DTPREL16_HI", /* name */
1355 FALSE, /* partial_inplace */
1356 0, /* src_mask */
1357 0xffff, /* dst_mask */
1358 FALSE), /* pcrel_offset */
1359
1360 /* Like DTPREL16_HI, but adjust for low 16 bits. */
1361 HOWTO (R_PPC64_DTPREL16_HA,
1362 16, /* rightshift */
1363 1, /* size (0 = byte, 1 = short, 2 = long) */
1364 16, /* bitsize */
1365 FALSE, /* pc_relative */
1366 0, /* bitpos */
1367 complain_overflow_dont, /* complain_on_overflow */
1368 ppc64_elf_unhandled_reloc, /* special_function */
1369 "R_PPC64_DTPREL16_HA", /* name */
1370 FALSE, /* partial_inplace */
1371 0, /* src_mask */
1372 0xffff, /* dst_mask */
1373 FALSE), /* pcrel_offset */
1374
1375 /* Like DTPREL16_HI, but next higher group of 16 bits. */
1376 HOWTO (R_PPC64_DTPREL16_HIGHER,
1377 32, /* rightshift */
1378 1, /* size (0 = byte, 1 = short, 2 = long) */
1379 16, /* bitsize */
1380 FALSE, /* pc_relative */
1381 0, /* bitpos */
1382 complain_overflow_dont, /* complain_on_overflow */
1383 ppc64_elf_unhandled_reloc, /* special_function */
1384 "R_PPC64_DTPREL16_HIGHER", /* name */
1385 FALSE, /* partial_inplace */
1386 0, /* src_mask */
1387 0xffff, /* dst_mask */
1388 FALSE), /* pcrel_offset */
1389
1390 /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */
1391 HOWTO (R_PPC64_DTPREL16_HIGHERA,
1392 32, /* rightshift */
1393 1, /* size (0 = byte, 1 = short, 2 = long) */
1394 16, /* bitsize */
1395 FALSE, /* pc_relative */
1396 0, /* bitpos */
1397 complain_overflow_dont, /* complain_on_overflow */
1398 ppc64_elf_unhandled_reloc, /* special_function */
1399 "R_PPC64_DTPREL16_HIGHERA", /* name */
1400 FALSE, /* partial_inplace */
1401 0, /* src_mask */
1402 0xffff, /* dst_mask */
1403 FALSE), /* pcrel_offset */
1404
1405 /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */
1406 HOWTO (R_PPC64_DTPREL16_HIGHEST,
1407 48, /* rightshift */
1408 1, /* size (0 = byte, 1 = short, 2 = long) */
1409 16, /* bitsize */
1410 FALSE, /* pc_relative */
1411 0, /* bitpos */
1412 complain_overflow_dont, /* complain_on_overflow */
1413 ppc64_elf_unhandled_reloc, /* special_function */
1414 "R_PPC64_DTPREL16_HIGHEST", /* name */
1415 FALSE, /* partial_inplace */
1416 0, /* src_mask */
1417 0xffff, /* dst_mask */
1418 FALSE), /* pcrel_offset */
1419
1420 /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */
1421 HOWTO (R_PPC64_DTPREL16_HIGHESTA,
1422 48, /* rightshift */
1423 1, /* size (0 = byte, 1 = short, 2 = long) */
1424 16, /* bitsize */
1425 FALSE, /* pc_relative */
1426 0, /* bitpos */
1427 complain_overflow_dont, /* complain_on_overflow */
1428 ppc64_elf_unhandled_reloc, /* special_function */
1429 "R_PPC64_DTPREL16_HIGHESTA", /* name */
1430 FALSE, /* partial_inplace */
1431 0, /* src_mask */
1432 0xffff, /* dst_mask */
1433 FALSE), /* pcrel_offset */
1434
1435 /* Like DTPREL16, but for insns with a DS field. */
1436 HOWTO (R_PPC64_DTPREL16_DS,
1437 0, /* rightshift */
1438 1, /* size (0 = byte, 1 = short, 2 = long) */
1439 16, /* bitsize */
1440 FALSE, /* pc_relative */
1441 0, /* bitpos */
1442 complain_overflow_signed, /* complain_on_overflow */
1443 ppc64_elf_unhandled_reloc, /* special_function */
1444 "R_PPC64_DTPREL16_DS", /* name */
1445 FALSE, /* partial_inplace */
1446 0, /* src_mask */
1447 0xfffc, /* dst_mask */
1448 FALSE), /* pcrel_offset */
1449
1450 /* Like DTPREL16_DS, but no overflow. */
1451 HOWTO (R_PPC64_DTPREL16_LO_DS,
1452 0, /* rightshift */
1453 1, /* size (0 = byte, 1 = short, 2 = long) */
1454 16, /* bitsize */
1455 FALSE, /* pc_relative */
1456 0, /* bitpos */
1457 complain_overflow_dont, /* complain_on_overflow */
1458 ppc64_elf_unhandled_reloc, /* special_function */
1459 "R_PPC64_DTPREL16_LO_DS", /* name */
1460 FALSE, /* partial_inplace */
1461 0, /* src_mask */
1462 0xfffc, /* dst_mask */
1463 FALSE), /* pcrel_offset */
1464
1465 /* Computes a tp-relative displacement, the difference between the value of
1466 sym+add and the value of the thread pointer (r13). */
1467 HOWTO (R_PPC64_TPREL64,
1468 0, /* rightshift */
1469 4, /* size (0 = byte, 1 = short, 2 = long) */
1470 64, /* bitsize */
1471 FALSE, /* pc_relative */
1472 0, /* bitpos */
1473 complain_overflow_dont, /* complain_on_overflow */
1474 ppc64_elf_unhandled_reloc, /* special_function */
1475 "R_PPC64_TPREL64", /* name */
1476 FALSE, /* partial_inplace */
1477 0, /* src_mask */
1478 ONES (64), /* dst_mask */
1479 FALSE), /* pcrel_offset */
1480
1481 /* A 16 bit tprel reloc. */
1482 HOWTO (R_PPC64_TPREL16,
1483 0, /* rightshift */
1484 1, /* size (0 = byte, 1 = short, 2 = long) */
1485 16, /* bitsize */
1486 FALSE, /* pc_relative */
1487 0, /* bitpos */
1488 complain_overflow_signed, /* complain_on_overflow */
1489 ppc64_elf_unhandled_reloc, /* special_function */
1490 "R_PPC64_TPREL16", /* name */
1491 FALSE, /* partial_inplace */
1492 0, /* src_mask */
1493 0xffff, /* dst_mask */
1494 FALSE), /* pcrel_offset */
1495
1496 /* Like TPREL16, but no overflow. */
1497 HOWTO (R_PPC64_TPREL16_LO,
1498 0, /* rightshift */
1499 1, /* size (0 = byte, 1 = short, 2 = long) */
1500 16, /* bitsize */
1501 FALSE, /* pc_relative */
1502 0, /* bitpos */
1503 complain_overflow_dont, /* complain_on_overflow */
1504 ppc64_elf_unhandled_reloc, /* special_function */
1505 "R_PPC64_TPREL16_LO", /* name */
1506 FALSE, /* partial_inplace */
1507 0, /* src_mask */
1508 0xffff, /* dst_mask */
1509 FALSE), /* pcrel_offset */
1510
1511 /* Like TPREL16_LO, but next higher group of 16 bits. */
1512 HOWTO (R_PPC64_TPREL16_HI,
1513 16, /* rightshift */
1514 1, /* size (0 = byte, 1 = short, 2 = long) */
1515 16, /* bitsize */
1516 FALSE, /* pc_relative */
1517 0, /* bitpos */
1518 complain_overflow_dont, /* complain_on_overflow */
1519 ppc64_elf_unhandled_reloc, /* special_function */
1520 "R_PPC64_TPREL16_HI", /* name */
1521 FALSE, /* partial_inplace */
1522 0, /* src_mask */
1523 0xffff, /* dst_mask */
1524 FALSE), /* pcrel_offset */
1525
1526 /* Like TPREL16_HI, but adjust for low 16 bits. */
1527 HOWTO (R_PPC64_TPREL16_HA,
1528 16, /* rightshift */
1529 1, /* size (0 = byte, 1 = short, 2 = long) */
1530 16, /* bitsize */
1531 FALSE, /* pc_relative */
1532 0, /* bitpos */
1533 complain_overflow_dont, /* complain_on_overflow */
1534 ppc64_elf_unhandled_reloc, /* special_function */
1535 "R_PPC64_TPREL16_HA", /* name */
1536 FALSE, /* partial_inplace */
1537 0, /* src_mask */
1538 0xffff, /* dst_mask */
1539 FALSE), /* pcrel_offset */
1540
1541 /* Like TPREL16_HI, but next higher group of 16 bits. */
1542 HOWTO (R_PPC64_TPREL16_HIGHER,
1543 32, /* rightshift */
1544 1, /* size (0 = byte, 1 = short, 2 = long) */
1545 16, /* bitsize */
1546 FALSE, /* pc_relative */
1547 0, /* bitpos */
1548 complain_overflow_dont, /* complain_on_overflow */
1549 ppc64_elf_unhandled_reloc, /* special_function */
1550 "R_PPC64_TPREL16_HIGHER", /* name */
1551 FALSE, /* partial_inplace */
1552 0, /* src_mask */
1553 0xffff, /* dst_mask */
1554 FALSE), /* pcrel_offset */
1555
1556 /* Like TPREL16_HIGHER, but adjust for low 16 bits. */
1557 HOWTO (R_PPC64_TPREL16_HIGHERA,
1558 32, /* rightshift */
1559 1, /* size (0 = byte, 1 = short, 2 = long) */
1560 16, /* bitsize */
1561 FALSE, /* pc_relative */
1562 0, /* bitpos */
1563 complain_overflow_dont, /* complain_on_overflow */
1564 ppc64_elf_unhandled_reloc, /* special_function */
1565 "R_PPC64_TPREL16_HIGHERA", /* name */
1566 FALSE, /* partial_inplace */
1567 0, /* src_mask */
1568 0xffff, /* dst_mask */
1569 FALSE), /* pcrel_offset */
1570
1571 /* Like TPREL16_HIGHER, but next higher group of 16 bits. */
1572 HOWTO (R_PPC64_TPREL16_HIGHEST,
1573 48, /* rightshift */
1574 1, /* size (0 = byte, 1 = short, 2 = long) */
1575 16, /* bitsize */
1576 FALSE, /* pc_relative */
1577 0, /* bitpos */
1578 complain_overflow_dont, /* complain_on_overflow */
1579 ppc64_elf_unhandled_reloc, /* special_function */
1580 "R_PPC64_TPREL16_HIGHEST", /* name */
1581 FALSE, /* partial_inplace */
1582 0, /* src_mask */
1583 0xffff, /* dst_mask */
1584 FALSE), /* pcrel_offset */
1585
1586 /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */
1587 HOWTO (R_PPC64_TPREL16_HIGHESTA,
1588 48, /* rightshift */
1589 1, /* size (0 = byte, 1 = short, 2 = long) */
1590 16, /* bitsize */
1591 FALSE, /* pc_relative */
1592 0, /* bitpos */
1593 complain_overflow_dont, /* complain_on_overflow */
1594 ppc64_elf_unhandled_reloc, /* special_function */
1595 "R_PPC64_TPREL16_HIGHESTA", /* name */
1596 FALSE, /* partial_inplace */
1597 0, /* src_mask */
1598 0xffff, /* dst_mask */
1599 FALSE), /* pcrel_offset */
1600
1601 /* Like TPREL16, but for insns with a DS field. */
1602 HOWTO (R_PPC64_TPREL16_DS,
1603 0, /* rightshift */
1604 1, /* size (0 = byte, 1 = short, 2 = long) */
1605 16, /* bitsize */
1606 FALSE, /* pc_relative */
1607 0, /* bitpos */
1608 complain_overflow_signed, /* complain_on_overflow */
1609 ppc64_elf_unhandled_reloc, /* special_function */
1610 "R_PPC64_TPREL16_DS", /* name */
1611 FALSE, /* partial_inplace */
1612 0, /* src_mask */
1613 0xfffc, /* dst_mask */
1614 FALSE), /* pcrel_offset */
1615
1616 /* Like TPREL16_DS, but no overflow. */
1617 HOWTO (R_PPC64_TPREL16_LO_DS,
1618 0, /* rightshift */
1619 1, /* size (0 = byte, 1 = short, 2 = long) */
1620 16, /* bitsize */
1621 FALSE, /* pc_relative */
1622 0, /* bitpos */
1623 complain_overflow_dont, /* complain_on_overflow */
1624 ppc64_elf_unhandled_reloc, /* special_function */
1625 "R_PPC64_TPREL16_LO_DS", /* name */
1626 FALSE, /* partial_inplace */
1627 0, /* src_mask */
1628 0xfffc, /* dst_mask */
1629 FALSE), /* pcrel_offset */
1630
1631 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1632 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1633 to the first entry relative to the TOC base (r2). */
1634 HOWTO (R_PPC64_GOT_TLSGD16,
1635 0, /* rightshift */
1636 1, /* size (0 = byte, 1 = short, 2 = long) */
1637 16, /* bitsize */
1638 FALSE, /* pc_relative */
1639 0, /* bitpos */
1640 complain_overflow_signed, /* complain_on_overflow */
1641 ppc64_elf_unhandled_reloc, /* special_function */
1642 "R_PPC64_GOT_TLSGD16", /* name */
1643 FALSE, /* partial_inplace */
1644 0, /* src_mask */
1645 0xffff, /* dst_mask */
1646 FALSE), /* pcrel_offset */
1647
1648 /* Like GOT_TLSGD16, but no overflow. */
1649 HOWTO (R_PPC64_GOT_TLSGD16_LO,
1650 0, /* rightshift */
1651 1, /* size (0 = byte, 1 = short, 2 = long) */
1652 16, /* bitsize */
1653 FALSE, /* pc_relative */
1654 0, /* bitpos */
1655 complain_overflow_dont, /* complain_on_overflow */
1656 ppc64_elf_unhandled_reloc, /* special_function */
1657 "R_PPC64_GOT_TLSGD16_LO", /* name */
1658 FALSE, /* partial_inplace */
1659 0, /* src_mask */
1660 0xffff, /* dst_mask */
1661 FALSE), /* pcrel_offset */
1662
1663 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1664 HOWTO (R_PPC64_GOT_TLSGD16_HI,
1665 16, /* rightshift */
1666 1, /* size (0 = byte, 1 = short, 2 = long) */
1667 16, /* bitsize */
1668 FALSE, /* pc_relative */
1669 0, /* bitpos */
1670 complain_overflow_dont, /* complain_on_overflow */
1671 ppc64_elf_unhandled_reloc, /* special_function */
1672 "R_PPC64_GOT_TLSGD16_HI", /* name */
1673 FALSE, /* partial_inplace */
1674 0, /* src_mask */
1675 0xffff, /* dst_mask */
1676 FALSE), /* pcrel_offset */
1677
1678 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1679 HOWTO (R_PPC64_GOT_TLSGD16_HA,
1680 16, /* rightshift */
1681 1, /* size (0 = byte, 1 = short, 2 = long) */
1682 16, /* bitsize */
1683 FALSE, /* pc_relative */
1684 0, /* bitpos */
1685 complain_overflow_dont, /* complain_on_overflow */
1686 ppc64_elf_unhandled_reloc, /* special_function */
1687 "R_PPC64_GOT_TLSGD16_HA", /* name */
1688 FALSE, /* partial_inplace */
1689 0, /* src_mask */
1690 0xffff, /* dst_mask */
1691 FALSE), /* pcrel_offset */
1692
1693 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1694 with values (sym+add)@dtpmod and zero, and computes the offset to the
1695 first entry relative to the TOC base (r2). */
1696 HOWTO (R_PPC64_GOT_TLSLD16,
1697 0, /* rightshift */
1698 1, /* size (0 = byte, 1 = short, 2 = long) */
1699 16, /* bitsize */
1700 FALSE, /* pc_relative */
1701 0, /* bitpos */
1702 complain_overflow_signed, /* complain_on_overflow */
1703 ppc64_elf_unhandled_reloc, /* special_function */
1704 "R_PPC64_GOT_TLSLD16", /* name */
1705 FALSE, /* partial_inplace */
1706 0, /* src_mask */
1707 0xffff, /* dst_mask */
1708 FALSE), /* pcrel_offset */
1709
1710 /* Like GOT_TLSLD16, but no overflow. */
1711 HOWTO (R_PPC64_GOT_TLSLD16_LO,
1712 0, /* rightshift */
1713 1, /* size (0 = byte, 1 = short, 2 = long) */
1714 16, /* bitsize */
1715 FALSE, /* pc_relative */
1716 0, /* bitpos */
1717 complain_overflow_dont, /* complain_on_overflow */
1718 ppc64_elf_unhandled_reloc, /* special_function */
1719 "R_PPC64_GOT_TLSLD16_LO", /* name */
1720 FALSE, /* partial_inplace */
1721 0, /* src_mask */
1722 0xffff, /* dst_mask */
1723 FALSE), /* pcrel_offset */
1724
1725 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1726 HOWTO (R_PPC64_GOT_TLSLD16_HI,
1727 16, /* rightshift */
1728 1, /* size (0 = byte, 1 = short, 2 = long) */
1729 16, /* bitsize */
1730 FALSE, /* pc_relative */
1731 0, /* bitpos */
1732 complain_overflow_dont, /* complain_on_overflow */
1733 ppc64_elf_unhandled_reloc, /* special_function */
1734 "R_PPC64_GOT_TLSLD16_HI", /* name */
1735 FALSE, /* partial_inplace */
1736 0, /* src_mask */
1737 0xffff, /* dst_mask */
1738 FALSE), /* pcrel_offset */
1739
1740 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1741 HOWTO (R_PPC64_GOT_TLSLD16_HA,
1742 16, /* rightshift */
1743 1, /* size (0 = byte, 1 = short, 2 = long) */
1744 16, /* bitsize */
1745 FALSE, /* pc_relative */
1746 0, /* bitpos */
1747 complain_overflow_dont, /* complain_on_overflow */
1748 ppc64_elf_unhandled_reloc, /* special_function */
1749 "R_PPC64_GOT_TLSLD16_HA", /* name */
1750 FALSE, /* partial_inplace */
1751 0, /* src_mask */
1752 0xffff, /* dst_mask */
1753 FALSE), /* pcrel_offset */
1754
1755 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1756 the offset to the entry relative to the TOC base (r2). */
1757 HOWTO (R_PPC64_GOT_DTPREL16_DS,
1758 0, /* rightshift */
1759 1, /* size (0 = byte, 1 = short, 2 = long) */
1760 16, /* bitsize */
1761 FALSE, /* pc_relative */
1762 0, /* bitpos */
1763 complain_overflow_signed, /* complain_on_overflow */
1764 ppc64_elf_unhandled_reloc, /* special_function */
1765 "R_PPC64_GOT_DTPREL16_DS", /* name */
1766 FALSE, /* partial_inplace */
1767 0, /* src_mask */
1768 0xfffc, /* dst_mask */
1769 FALSE), /* pcrel_offset */
1770
1771 /* Like GOT_DTPREL16_DS, but no overflow. */
1772 HOWTO (R_PPC64_GOT_DTPREL16_LO_DS,
1773 0, /* rightshift */
1774 1, /* size (0 = byte, 1 = short, 2 = long) */
1775 16, /* bitsize */
1776 FALSE, /* pc_relative */
1777 0, /* bitpos */
1778 complain_overflow_dont, /* complain_on_overflow */
1779 ppc64_elf_unhandled_reloc, /* special_function */
1780 "R_PPC64_GOT_DTPREL16_LO_DS", /* name */
1781 FALSE, /* partial_inplace */
1782 0, /* src_mask */
1783 0xfffc, /* dst_mask */
1784 FALSE), /* pcrel_offset */
1785
1786 /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */
1787 HOWTO (R_PPC64_GOT_DTPREL16_HI,
1788 16, /* rightshift */
1789 1, /* size (0 = byte, 1 = short, 2 = long) */
1790 16, /* bitsize */
1791 FALSE, /* pc_relative */
1792 0, /* bitpos */
1793 complain_overflow_dont, /* complain_on_overflow */
1794 ppc64_elf_unhandled_reloc, /* special_function */
1795 "R_PPC64_GOT_DTPREL16_HI", /* name */
1796 FALSE, /* partial_inplace */
1797 0, /* src_mask */
1798 0xffff, /* dst_mask */
1799 FALSE), /* pcrel_offset */
1800
1801 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1802 HOWTO (R_PPC64_GOT_DTPREL16_HA,
1803 16, /* rightshift */
1804 1, /* size (0 = byte, 1 = short, 2 = long) */
1805 16, /* bitsize */
1806 FALSE, /* pc_relative */
1807 0, /* bitpos */
1808 complain_overflow_dont, /* complain_on_overflow */
1809 ppc64_elf_unhandled_reloc, /* special_function */
1810 "R_PPC64_GOT_DTPREL16_HA", /* name */
1811 FALSE, /* partial_inplace */
1812 0, /* src_mask */
1813 0xffff, /* dst_mask */
1814 FALSE), /* pcrel_offset */
1815
1816 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1817 offset to the entry relative to the TOC base (r2). */
1818 HOWTO (R_PPC64_GOT_TPREL16_DS,
1819 0, /* rightshift */
1820 1, /* size (0 = byte, 1 = short, 2 = long) */
1821 16, /* bitsize */
1822 FALSE, /* pc_relative */
1823 0, /* bitpos */
1824 complain_overflow_signed, /* complain_on_overflow */
1825 ppc64_elf_unhandled_reloc, /* special_function */
1826 "R_PPC64_GOT_TPREL16_DS", /* name */
1827 FALSE, /* partial_inplace */
1828 0, /* src_mask */
1829 0xfffc, /* dst_mask */
1830 FALSE), /* pcrel_offset */
1831
1832 /* Like GOT_TPREL16_DS, but no overflow. */
1833 HOWTO (R_PPC64_GOT_TPREL16_LO_DS,
1834 0, /* rightshift */
1835 1, /* size (0 = byte, 1 = short, 2 = long) */
1836 16, /* bitsize */
1837 FALSE, /* pc_relative */
1838 0, /* bitpos */
1839 complain_overflow_dont, /* complain_on_overflow */
1840 ppc64_elf_unhandled_reloc, /* special_function */
1841 "R_PPC64_GOT_TPREL16_LO_DS", /* name */
1842 FALSE, /* partial_inplace */
1843 0, /* src_mask */
1844 0xfffc, /* dst_mask */
1845 FALSE), /* pcrel_offset */
1846
1847 /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */
1848 HOWTO (R_PPC64_GOT_TPREL16_HI,
1849 16, /* rightshift */
1850 1, /* size (0 = byte, 1 = short, 2 = long) */
1851 16, /* bitsize */
1852 FALSE, /* pc_relative */
1853 0, /* bitpos */
1854 complain_overflow_dont, /* complain_on_overflow */
1855 ppc64_elf_unhandled_reloc, /* special_function */
1856 "R_PPC64_GOT_TPREL16_HI", /* name */
1857 FALSE, /* partial_inplace */
1858 0, /* src_mask */
1859 0xffff, /* dst_mask */
1860 FALSE), /* pcrel_offset */
1861
1862 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1863 HOWTO (R_PPC64_GOT_TPREL16_HA,
1864 16, /* rightshift */
1865 1, /* size (0 = byte, 1 = short, 2 = long) */
1866 16, /* bitsize */
1867 FALSE, /* pc_relative */
1868 0, /* bitpos */
1869 complain_overflow_dont, /* complain_on_overflow */
1870 ppc64_elf_unhandled_reloc, /* special_function */
1871 "R_PPC64_GOT_TPREL16_HA", /* name */
1872 FALSE, /* partial_inplace */
1873 0, /* src_mask */
1874 0xffff, /* dst_mask */
1875 FALSE), /* pcrel_offset */
1876
1877 HOWTO (R_PPC64_JMP_IREL, /* type */
1878 0, /* rightshift */
1879 0, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1880 0, /* bitsize */
1881 FALSE, /* pc_relative */
1882 0, /* bitpos */
1883 complain_overflow_dont, /* complain_on_overflow */
1884 ppc64_elf_unhandled_reloc, /* special_function */
1885 "R_PPC64_JMP_IREL", /* name */
1886 FALSE, /* partial_inplace */
1887 0, /* src_mask */
1888 0, /* dst_mask */
1889 FALSE), /* pcrel_offset */
1890
1891 HOWTO (R_PPC64_IRELATIVE, /* type */
1892 0, /* rightshift */
1893 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1894 64, /* bitsize */
1895 FALSE, /* pc_relative */
1896 0, /* bitpos */
1897 complain_overflow_dont, /* complain_on_overflow */
1898 bfd_elf_generic_reloc, /* special_function */
1899 "R_PPC64_IRELATIVE", /* name */
1900 FALSE, /* partial_inplace */
1901 0, /* src_mask */
1902 ONES (64), /* dst_mask */
1903 FALSE), /* pcrel_offset */
1904
1905 /* A 16 bit relative relocation. */
1906 HOWTO (R_PPC64_REL16, /* type */
1907 0, /* rightshift */
1908 1, /* size (0 = byte, 1 = short, 2 = long) */
1909 16, /* bitsize */
1910 TRUE, /* pc_relative */
1911 0, /* bitpos */
1912 complain_overflow_bitfield, /* complain_on_overflow */
1913 bfd_elf_generic_reloc, /* special_function */
1914 "R_PPC64_REL16", /* name */
1915 FALSE, /* partial_inplace */
1916 0, /* src_mask */
1917 0xffff, /* dst_mask */
1918 TRUE), /* pcrel_offset */
1919
1920 /* A 16 bit relative relocation without overflow. */
1921 HOWTO (R_PPC64_REL16_LO, /* type */
1922 0, /* rightshift */
1923 1, /* size (0 = byte, 1 = short, 2 = long) */
1924 16, /* bitsize */
1925 TRUE, /* pc_relative */
1926 0, /* bitpos */
1927 complain_overflow_dont,/* complain_on_overflow */
1928 bfd_elf_generic_reloc, /* special_function */
1929 "R_PPC64_REL16_LO", /* name */
1930 FALSE, /* partial_inplace */
1931 0, /* src_mask */
1932 0xffff, /* dst_mask */
1933 TRUE), /* pcrel_offset */
1934
1935 /* The high order 16 bits of a relative address. */
1936 HOWTO (R_PPC64_REL16_HI, /* type */
1937 16, /* rightshift */
1938 1, /* size (0 = byte, 1 = short, 2 = long) */
1939 16, /* bitsize */
1940 TRUE, /* pc_relative */
1941 0, /* bitpos */
1942 complain_overflow_dont, /* complain_on_overflow */
1943 bfd_elf_generic_reloc, /* special_function */
1944 "R_PPC64_REL16_HI", /* name */
1945 FALSE, /* partial_inplace */
1946 0, /* src_mask */
1947 0xffff, /* dst_mask */
1948 TRUE), /* pcrel_offset */
1949
1950 /* The high order 16 bits of a relative address, plus 1 if the contents of
1951 the low 16 bits, treated as a signed number, is negative. */
1952 HOWTO (R_PPC64_REL16_HA, /* type */
1953 16, /* rightshift */
1954 1, /* size (0 = byte, 1 = short, 2 = long) */
1955 16, /* bitsize */
1956 TRUE, /* pc_relative */
1957 0, /* bitpos */
1958 complain_overflow_dont, /* complain_on_overflow */
1959 ppc64_elf_ha_reloc, /* special_function */
1960 "R_PPC64_REL16_HA", /* name */
1961 FALSE, /* partial_inplace */
1962 0, /* src_mask */
1963 0xffff, /* dst_mask */
1964 TRUE), /* pcrel_offset */
1965
1966 /* GNU extension to record C++ vtable hierarchy. */
1967 HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
1968 0, /* rightshift */
1969 0, /* size (0 = byte, 1 = short, 2 = long) */
1970 0, /* bitsize */
1971 FALSE, /* pc_relative */
1972 0, /* bitpos */
1973 complain_overflow_dont, /* complain_on_overflow */
1974 NULL, /* special_function */
1975 "R_PPC64_GNU_VTINHERIT", /* name */
1976 FALSE, /* partial_inplace */
1977 0, /* src_mask */
1978 0, /* dst_mask */
1979 FALSE), /* pcrel_offset */
1980
1981 /* GNU extension to record C++ vtable member usage. */
1982 HOWTO (R_PPC64_GNU_VTENTRY, /* type */
1983 0, /* rightshift */
1984 0, /* size (0 = byte, 1 = short, 2 = long) */
1985 0, /* bitsize */
1986 FALSE, /* pc_relative */
1987 0, /* bitpos */
1988 complain_overflow_dont, /* complain_on_overflow */
1989 NULL, /* special_function */
1990 "R_PPC64_GNU_VTENTRY", /* name */
1991 FALSE, /* partial_inplace */
1992 0, /* src_mask */
1993 0, /* dst_mask */
1994 FALSE), /* pcrel_offset */
1995 };
1996
1997 \f
1998 /* Initialize the ppc64_elf_howto_table, so that linear accesses can
1999 be done. */
2000
2001 static void
2002 ppc_howto_init (void)
2003 {
2004 unsigned int i, type;
2005
2006 for (i = 0;
2007 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
2008 i++)
2009 {
2010 type = ppc64_elf_howto_raw[i].type;
2011 BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
2012 / sizeof (ppc64_elf_howto_table[0])));
2013 ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
2014 }
2015 }
2016
2017 static reloc_howto_type *
2018 ppc64_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2019 bfd_reloc_code_real_type code)
2020 {
2021 enum elf_ppc64_reloc_type r = R_PPC64_NONE;
2022
2023 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2024 /* Initialize howto table if needed. */
2025 ppc_howto_init ();
2026
2027 switch (code)
2028 {
2029 default:
2030 return NULL;
2031
2032 case BFD_RELOC_NONE: r = R_PPC64_NONE;
2033 break;
2034 case BFD_RELOC_32: r = R_PPC64_ADDR32;
2035 break;
2036 case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24;
2037 break;
2038 case BFD_RELOC_16: r = R_PPC64_ADDR16;
2039 break;
2040 case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO;
2041 break;
2042 case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI;
2043 break;
2044 case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA;
2045 break;
2046 case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14;
2047 break;
2048 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN;
2049 break;
2050 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN;
2051 break;
2052 case BFD_RELOC_PPC_B26: r = R_PPC64_REL24;
2053 break;
2054 case BFD_RELOC_PPC_B16: r = R_PPC64_REL14;
2055 break;
2056 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN;
2057 break;
2058 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN;
2059 break;
2060 case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16;
2061 break;
2062 case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO;
2063 break;
2064 case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI;
2065 break;
2066 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA;
2067 break;
2068 case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY;
2069 break;
2070 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT;
2071 break;
2072 case BFD_RELOC_32_PCREL: r = R_PPC64_REL32;
2073 break;
2074 case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32;
2075 break;
2076 case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32;
2077 break;
2078 case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO;
2079 break;
2080 case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI;
2081 break;
2082 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA;
2083 break;
2084 case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF;
2085 break;
2086 case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO;
2087 break;
2088 case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI;
2089 break;
2090 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA;
2091 break;
2092 case BFD_RELOC_CTOR: r = R_PPC64_ADDR64;
2093 break;
2094 case BFD_RELOC_64: r = R_PPC64_ADDR64;
2095 break;
2096 case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER;
2097 break;
2098 case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA;
2099 break;
2100 case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST;
2101 break;
2102 case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA;
2103 break;
2104 case BFD_RELOC_64_PCREL: r = R_PPC64_REL64;
2105 break;
2106 case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64;
2107 break;
2108 case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64;
2109 break;
2110 case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16;
2111 break;
2112 case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO;
2113 break;
2114 case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI;
2115 break;
2116 case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA;
2117 break;
2118 case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC;
2119 break;
2120 case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16;
2121 break;
2122 case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO;
2123 break;
2124 case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI;
2125 break;
2126 case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA;
2127 break;
2128 case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS;
2129 break;
2130 case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS;
2131 break;
2132 case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS;
2133 break;
2134 case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS;
2135 break;
2136 case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS;
2137 break;
2138 case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS;
2139 break;
2140 case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS;
2141 break;
2142 case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS;
2143 break;
2144 case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS;
2145 break;
2146 case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS;
2147 break;
2148 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS;
2149 break;
2150 case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS;
2151 break;
2152 case BFD_RELOC_PPC_TLSGD: r = R_PPC64_TLSGD;
2153 break;
2154 case BFD_RELOC_PPC_TLSLD: r = R_PPC64_TLSLD;
2155 break;
2156 case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64;
2157 break;
2158 case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16;
2159 break;
2160 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO;
2161 break;
2162 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI;
2163 break;
2164 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA;
2165 break;
2166 case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64;
2167 break;
2168 case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16;
2169 break;
2170 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO;
2171 break;
2172 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI;
2173 break;
2174 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA;
2175 break;
2176 case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64;
2177 break;
2178 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16;
2179 break;
2180 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO;
2181 break;
2182 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI;
2183 break;
2184 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA;
2185 break;
2186 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16;
2187 break;
2188 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO;
2189 break;
2190 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI;
2191 break;
2192 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA;
2193 break;
2194 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS;
2195 break;
2196 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS;
2197 break;
2198 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI;
2199 break;
2200 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA;
2201 break;
2202 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS;
2203 break;
2204 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS;
2205 break;
2206 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI;
2207 break;
2208 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA;
2209 break;
2210 case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS;
2211 break;
2212 case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS;
2213 break;
2214 case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER;
2215 break;
2216 case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA;
2217 break;
2218 case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST;
2219 break;
2220 case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA;
2221 break;
2222 case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS;
2223 break;
2224 case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS;
2225 break;
2226 case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER;
2227 break;
2228 case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA;
2229 break;
2230 case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST;
2231 break;
2232 case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA;
2233 break;
2234 case BFD_RELOC_16_PCREL: r = R_PPC64_REL16;
2235 break;
2236 case BFD_RELOC_LO16_PCREL: r = R_PPC64_REL16_LO;
2237 break;
2238 case BFD_RELOC_HI16_PCREL: r = R_PPC64_REL16_HI;
2239 break;
2240 case BFD_RELOC_HI16_S_PCREL: r = R_PPC64_REL16_HA;
2241 break;
2242 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT;
2243 break;
2244 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY;
2245 break;
2246 }
2247
2248 return ppc64_elf_howto_table[r];
2249 };
2250
2251 static reloc_howto_type *
2252 ppc64_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2253 const char *r_name)
2254 {
2255 unsigned int i;
2256
2257 for (i = 0;
2258 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
2259 i++)
2260 if (ppc64_elf_howto_raw[i].name != NULL
2261 && strcasecmp (ppc64_elf_howto_raw[i].name, r_name) == 0)
2262 return &ppc64_elf_howto_raw[i];
2263
2264 return NULL;
2265 }
2266
2267 /* Set the howto pointer for a PowerPC ELF reloc. */
2268
2269 static void
2270 ppc64_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
2271 Elf_Internal_Rela *dst)
2272 {
2273 unsigned int type;
2274
2275 /* Initialize howto table if needed. */
2276 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2277 ppc_howto_init ();
2278
2279 type = ELF64_R_TYPE (dst->r_info);
2280 if (type >= (sizeof (ppc64_elf_howto_table)
2281 / sizeof (ppc64_elf_howto_table[0])))
2282 {
2283 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
2284 abfd, (int) type);
2285 type = R_PPC64_NONE;
2286 }
2287 cache_ptr->howto = ppc64_elf_howto_table[type];
2288 }
2289
2290 /* Handle the R_PPC64_ADDR16_HA and similar relocs. */
2291
2292 static bfd_reloc_status_type
2293 ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2294 void *data, asection *input_section,
2295 bfd *output_bfd, char **error_message)
2296 {
2297 /* If this is a relocatable link (output_bfd test tells us), just
2298 call the generic function. Any adjustment will be done at final
2299 link time. */
2300 if (output_bfd != NULL)
2301 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2302 input_section, output_bfd, error_message);
2303
2304 /* Adjust the addend for sign extension of the low 16 bits.
2305 We won't actually be using the low 16 bits, so trashing them
2306 doesn't matter. */
2307 reloc_entry->addend += 0x8000;
2308 return bfd_reloc_continue;
2309 }
2310
2311 static bfd_reloc_status_type
2312 ppc64_elf_branch_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2313 void *data, asection *input_section,
2314 bfd *output_bfd, char **error_message)
2315 {
2316 if (output_bfd != NULL)
2317 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2318 input_section, output_bfd, error_message);
2319
2320 if (strcmp (symbol->section->name, ".opd") == 0
2321 && (symbol->section->owner->flags & DYNAMIC) == 0)
2322 {
2323 bfd_vma dest = opd_entry_value (symbol->section,
2324 symbol->value + reloc_entry->addend,
2325 NULL, NULL);
2326 if (dest != (bfd_vma) -1)
2327 reloc_entry->addend = dest - (symbol->value
2328 + symbol->section->output_section->vma
2329 + symbol->section->output_offset);
2330 }
2331 return bfd_reloc_continue;
2332 }
2333
2334 static bfd_reloc_status_type
2335 ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2336 void *data, asection *input_section,
2337 bfd *output_bfd, char **error_message)
2338 {
2339 long insn;
2340 enum elf_ppc64_reloc_type r_type;
2341 bfd_size_type octets;
2342 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
2343 bfd_boolean is_power4 = FALSE;
2344
2345 /* If this is a relocatable link (output_bfd test tells us), just
2346 call the generic function. Any adjustment will be done at final
2347 link time. */
2348 if (output_bfd != NULL)
2349 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2350 input_section, output_bfd, error_message);
2351
2352 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2353 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2354 insn &= ~(0x01 << 21);
2355 r_type = reloc_entry->howto->type;
2356 if (r_type == R_PPC64_ADDR14_BRTAKEN
2357 || r_type == R_PPC64_REL14_BRTAKEN)
2358 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
2359
2360 if (is_power4)
2361 {
2362 /* Set 'a' bit. This is 0b00010 in BO field for branch
2363 on CR(BI) insns (BO == 001at or 011at), and 0b01000
2364 for branch on CTR insns (BO == 1a00t or 1a01t). */
2365 if ((insn & (0x14 << 21)) == (0x04 << 21))
2366 insn |= 0x02 << 21;
2367 else if ((insn & (0x14 << 21)) == (0x10 << 21))
2368 insn |= 0x08 << 21;
2369 else
2370 goto out;
2371 }
2372 else
2373 {
2374 bfd_vma target = 0;
2375 bfd_vma from;
2376
2377 if (!bfd_is_com_section (symbol->section))
2378 target = symbol->value;
2379 target += symbol->section->output_section->vma;
2380 target += symbol->section->output_offset;
2381 target += reloc_entry->addend;
2382
2383 from = (reloc_entry->address
2384 + input_section->output_offset
2385 + input_section->output_section->vma);
2386
2387 /* Invert 'y' bit if not the default. */
2388 if ((bfd_signed_vma) (target - from) < 0)
2389 insn ^= 0x01 << 21;
2390 }
2391 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2392 out:
2393 return ppc64_elf_branch_reloc (abfd, reloc_entry, symbol, data,
2394 input_section, output_bfd, error_message);
2395 }
2396
2397 static bfd_reloc_status_type
2398 ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2399 void *data, asection *input_section,
2400 bfd *output_bfd, char **error_message)
2401 {
2402 /* If this is a relocatable link (output_bfd test tells us), just
2403 call the generic function. Any adjustment will be done at final
2404 link time. */
2405 if (output_bfd != NULL)
2406 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2407 input_section, output_bfd, error_message);
2408
2409 /* Subtract the symbol section base address. */
2410 reloc_entry->addend -= symbol->section->output_section->vma;
2411 return bfd_reloc_continue;
2412 }
2413
2414 static bfd_reloc_status_type
2415 ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2416 void *data, asection *input_section,
2417 bfd *output_bfd, char **error_message)
2418 {
2419 /* If this is a relocatable link (output_bfd test tells us), just
2420 call the generic function. Any adjustment will be done at final
2421 link time. */
2422 if (output_bfd != NULL)
2423 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2424 input_section, output_bfd, error_message);
2425
2426 /* Subtract the symbol section base address. */
2427 reloc_entry->addend -= symbol->section->output_section->vma;
2428
2429 /* Adjust the addend for sign extension of the low 16 bits. */
2430 reloc_entry->addend += 0x8000;
2431 return bfd_reloc_continue;
2432 }
2433
2434 static bfd_reloc_status_type
2435 ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2436 void *data, asection *input_section,
2437 bfd *output_bfd, char **error_message)
2438 {
2439 bfd_vma TOCstart;
2440
2441 /* If this is a relocatable link (output_bfd test tells us), just
2442 call the generic function. Any adjustment will be done at final
2443 link time. */
2444 if (output_bfd != NULL)
2445 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2446 input_section, output_bfd, error_message);
2447
2448 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2449 if (TOCstart == 0)
2450 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2451
2452 /* Subtract the TOC base address. */
2453 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2454 return bfd_reloc_continue;
2455 }
2456
2457 static bfd_reloc_status_type
2458 ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2459 void *data, asection *input_section,
2460 bfd *output_bfd, char **error_message)
2461 {
2462 bfd_vma TOCstart;
2463
2464 /* If this is a relocatable link (output_bfd test tells us), just
2465 call the generic function. Any adjustment will be done at final
2466 link time. */
2467 if (output_bfd != NULL)
2468 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2469 input_section, output_bfd, error_message);
2470
2471 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2472 if (TOCstart == 0)
2473 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2474
2475 /* Subtract the TOC base address. */
2476 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2477
2478 /* Adjust the addend for sign extension of the low 16 bits. */
2479 reloc_entry->addend += 0x8000;
2480 return bfd_reloc_continue;
2481 }
2482
2483 static bfd_reloc_status_type
2484 ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2485 void *data, asection *input_section,
2486 bfd *output_bfd, char **error_message)
2487 {
2488 bfd_vma TOCstart;
2489 bfd_size_type octets;
2490
2491 /* If this is a relocatable link (output_bfd test tells us), just
2492 call the generic function. Any adjustment will be done at final
2493 link time. */
2494 if (output_bfd != NULL)
2495 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2496 input_section, output_bfd, error_message);
2497
2498 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2499 if (TOCstart == 0)
2500 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2501
2502 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2503 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
2504 return bfd_reloc_ok;
2505 }
2506
2507 static bfd_reloc_status_type
2508 ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2509 void *data, asection *input_section,
2510 bfd *output_bfd, char **error_message)
2511 {
2512 /* If this is a relocatable link (output_bfd test tells us), just
2513 call the generic function. Any adjustment will be done at final
2514 link time. */
2515 if (output_bfd != NULL)
2516 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2517 input_section, output_bfd, error_message);
2518
2519 if (error_message != NULL)
2520 {
2521 static char buf[60];
2522 sprintf (buf, "generic linker can't handle %s",
2523 reloc_entry->howto->name);
2524 *error_message = buf;
2525 }
2526 return bfd_reloc_dangerous;
2527 }
2528
2529 /* Track GOT entries needed for a given symbol. We might need more
2530 than one got entry per symbol. */
2531 struct got_entry
2532 {
2533 struct got_entry *next;
2534
2535 /* The symbol addend that we'll be placing in the GOT. */
2536 bfd_vma addend;
2537
2538 /* Unlike other ELF targets, we use separate GOT entries for the same
2539 symbol referenced from different input files. This is to support
2540 automatic multiple TOC/GOT sections, where the TOC base can vary
2541 from one input file to another. After partitioning into TOC groups
2542 we merge entries within the group.
2543
2544 Point to the BFD owning this GOT entry. */
2545 bfd *owner;
2546
2547 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
2548 TLS_TPREL or TLS_DTPREL for tls entries. */
2549 unsigned char tls_type;
2550
2551 /* Non-zero if got.ent points to real entry. */
2552 unsigned char is_indirect;
2553
2554 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
2555 union
2556 {
2557 bfd_signed_vma refcount;
2558 bfd_vma offset;
2559 struct got_entry *ent;
2560 } got;
2561 };
2562
2563 /* The same for PLT. */
2564 struct plt_entry
2565 {
2566 struct plt_entry *next;
2567
2568 bfd_vma addend;
2569
2570 union
2571 {
2572 bfd_signed_vma refcount;
2573 bfd_vma offset;
2574 } plt;
2575 };
2576
2577 struct ppc64_elf_obj_tdata
2578 {
2579 struct elf_obj_tdata elf;
2580
2581 /* Shortcuts to dynamic linker sections. */
2582 asection *got;
2583 asection *relgot;
2584
2585 /* Used during garbage collection. We attach global symbols defined
2586 on removed .opd entries to this section so that the sym is removed. */
2587 asection *deleted_section;
2588
2589 /* TLS local dynamic got entry handling. Support for multiple GOT
2590 sections means we potentially need one of these for each input bfd. */
2591 struct got_entry tlsld_got;
2592
2593 /* A copy of relocs before they are modified for --emit-relocs. */
2594 Elf_Internal_Rela *opd_relocs;
2595
2596 /* Nonzero if this bfd has small toc/got relocs, ie. that expect
2597 the reloc to be in the range -32768 to 32767. */
2598 unsigned int has_small_toc_reloc;
2599 };
2600
2601 #define ppc64_elf_tdata(bfd) \
2602 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
2603
2604 #define ppc64_tlsld_got(bfd) \
2605 (&ppc64_elf_tdata (bfd)->tlsld_got)
2606
2607 #define is_ppc64_elf(bfd) \
2608 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2609 && elf_object_id (bfd) == PPC64_ELF_DATA)
2610
2611 /* Override the generic function because we store some extras. */
2612
2613 static bfd_boolean
2614 ppc64_elf_mkobject (bfd *abfd)
2615 {
2616 return bfd_elf_allocate_object (abfd, sizeof (struct ppc64_elf_obj_tdata),
2617 PPC64_ELF_DATA);
2618 }
2619
2620 /* Fix bad default arch selected for a 64 bit input bfd when the
2621 default is 32 bit. */
2622
2623 static bfd_boolean
2624 ppc64_elf_object_p (bfd *abfd)
2625 {
2626 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 32)
2627 {
2628 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2629
2630 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2631 {
2632 /* Relies on arch after 32 bit default being 64 bit default. */
2633 abfd->arch_info = abfd->arch_info->next;
2634 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2635 }
2636 }
2637 return TRUE;
2638 }
2639
2640 /* Support for core dump NOTE sections. */
2641
2642 static bfd_boolean
2643 ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2644 {
2645 size_t offset, size;
2646
2647 if (note->descsz != 504)
2648 return FALSE;
2649
2650 /* pr_cursig */
2651 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
2652
2653 /* pr_pid */
2654 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 32);
2655
2656 /* pr_reg */
2657 offset = 112;
2658 size = 384;
2659
2660 /* Make a ".reg/999" section. */
2661 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2662 size, note->descpos + offset);
2663 }
2664
2665 static bfd_boolean
2666 ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2667 {
2668 if (note->descsz != 136)
2669 return FALSE;
2670
2671 elf_tdata (abfd)->core_program
2672 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
2673 elf_tdata (abfd)->core_command
2674 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
2675
2676 return TRUE;
2677 }
2678
2679 static char *
2680 ppc64_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type,
2681 ...)
2682 {
2683 switch (note_type)
2684 {
2685 default:
2686 return NULL;
2687
2688 case NT_PRPSINFO:
2689 {
2690 char data[136];
2691 va_list ap;
2692
2693 va_start (ap, note_type);
2694 memset (data, 0, 40);
2695 strncpy (data + 40, va_arg (ap, const char *), 16);
2696 strncpy (data + 56, va_arg (ap, const char *), 80);
2697 va_end (ap);
2698 return elfcore_write_note (abfd, buf, bufsiz,
2699 "CORE", note_type, data, sizeof (data));
2700 }
2701
2702 case NT_PRSTATUS:
2703 {
2704 char data[504];
2705 va_list ap;
2706 long pid;
2707 int cursig;
2708 const void *greg;
2709
2710 va_start (ap, note_type);
2711 memset (data, 0, 112);
2712 pid = va_arg (ap, long);
2713 bfd_put_32 (abfd, pid, data + 32);
2714 cursig = va_arg (ap, int);
2715 bfd_put_16 (abfd, cursig, data + 12);
2716 greg = va_arg (ap, const void *);
2717 memcpy (data + 112, greg, 384);
2718 memset (data + 496, 0, 8);
2719 va_end (ap);
2720 return elfcore_write_note (abfd, buf, bufsiz,
2721 "CORE", note_type, data, sizeof (data));
2722 }
2723 }
2724 }
2725
2726 /* Merge backend specific data from an object file to the output
2727 object file when linking. */
2728
2729 static bfd_boolean
2730 ppc64_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
2731 {
2732 /* Check if we have the same endianess. */
2733 if (ibfd->xvec->byteorder != obfd->xvec->byteorder
2734 && ibfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN
2735 && obfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN)
2736 {
2737 const char *msg;
2738
2739 if (bfd_big_endian (ibfd))
2740 msg = _("%B: compiled for a big endian system "
2741 "and target is little endian");
2742 else
2743 msg = _("%B: compiled for a little endian system "
2744 "and target is big endian");
2745
2746 (*_bfd_error_handler) (msg, ibfd);
2747
2748 bfd_set_error (bfd_error_wrong_format);
2749 return FALSE;
2750 }
2751
2752 return TRUE;
2753 }
2754
2755 /* Add extra PPC sections. */
2756
2757 static const struct bfd_elf_special_section ppc64_elf_special_sections[]=
2758 {
2759 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, 0 },
2760 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2761 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2762 { STRING_COMMA_LEN (".toc"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2763 { STRING_COMMA_LEN (".toc1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2764 { STRING_COMMA_LEN (".tocbss"), 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2765 { NULL, 0, 0, 0, 0 }
2766 };
2767
2768 enum _ppc64_sec_type {
2769 sec_normal = 0,
2770 sec_opd = 1,
2771 sec_toc = 2
2772 };
2773
2774 struct _ppc64_elf_section_data
2775 {
2776 struct bfd_elf_section_data elf;
2777
2778 union
2779 {
2780 /* An array with one entry for each opd function descriptor. */
2781 struct _opd_sec_data
2782 {
2783 /* Points to the function code section for local opd entries. */
2784 asection **func_sec;
2785
2786 /* After editing .opd, adjust references to opd local syms. */
2787 long *adjust;
2788 } opd;
2789
2790 /* An array for toc sections, indexed by offset/8. */
2791 struct _toc_sec_data
2792 {
2793 /* Specifies the relocation symbol index used at a given toc offset. */
2794 unsigned *symndx;
2795
2796 /* And the relocation addend. */
2797 bfd_vma *add;
2798 } toc;
2799 } u;
2800
2801 enum _ppc64_sec_type sec_type:2;
2802
2803 /* Flag set when small branches are detected. Used to
2804 select suitable defaults for the stub group size. */
2805 unsigned int has_14bit_branch:1;
2806 };
2807
2808 #define ppc64_elf_section_data(sec) \
2809 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
2810
2811 static bfd_boolean
2812 ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
2813 {
2814 if (!sec->used_by_bfd)
2815 {
2816 struct _ppc64_elf_section_data *sdata;
2817 bfd_size_type amt = sizeof (*sdata);
2818
2819 sdata = bfd_zalloc (abfd, amt);
2820 if (sdata == NULL)
2821 return FALSE;
2822 sec->used_by_bfd = sdata;
2823 }
2824
2825 return _bfd_elf_new_section_hook (abfd, sec);
2826 }
2827
2828 static struct _opd_sec_data *
2829 get_opd_info (asection * sec)
2830 {
2831 if (sec != NULL
2832 && ppc64_elf_section_data (sec) != NULL
2833 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
2834 return &ppc64_elf_section_data (sec)->u.opd;
2835 return NULL;
2836 }
2837 \f
2838 /* Parameters for the qsort hook. */
2839 static bfd_boolean synthetic_relocatable;
2840
2841 /* qsort comparison function for ppc64_elf_get_synthetic_symtab. */
2842
2843 static int
2844 compare_symbols (const void *ap, const void *bp)
2845 {
2846 const asymbol *a = * (const asymbol **) ap;
2847 const asymbol *b = * (const asymbol **) bp;
2848
2849 /* Section symbols first. */
2850 if ((a->flags & BSF_SECTION_SYM) && !(b->flags & BSF_SECTION_SYM))
2851 return -1;
2852 if (!(a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM))
2853 return 1;
2854
2855 /* then .opd symbols. */
2856 if (strcmp (a->section->name, ".opd") == 0
2857 && strcmp (b->section->name, ".opd") != 0)
2858 return -1;
2859 if (strcmp (a->section->name, ".opd") != 0
2860 && strcmp (b->section->name, ".opd") == 0)
2861 return 1;
2862
2863 /* then other code symbols. */
2864 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2865 == (SEC_CODE | SEC_ALLOC)
2866 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2867 != (SEC_CODE | SEC_ALLOC))
2868 return -1;
2869
2870 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2871 != (SEC_CODE | SEC_ALLOC)
2872 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2873 == (SEC_CODE | SEC_ALLOC))
2874 return 1;
2875
2876 if (synthetic_relocatable)
2877 {
2878 if (a->section->id < b->section->id)
2879 return -1;
2880
2881 if (a->section->id > b->section->id)
2882 return 1;
2883 }
2884
2885 if (a->value + a->section->vma < b->value + b->section->vma)
2886 return -1;
2887
2888 if (a->value + a->section->vma > b->value + b->section->vma)
2889 return 1;
2890
2891 /* For syms with the same value, prefer strong dynamic global function
2892 syms over other syms. */
2893 if ((a->flags & BSF_GLOBAL) != 0 && (b->flags & BSF_GLOBAL) == 0)
2894 return -1;
2895
2896 if ((a->flags & BSF_GLOBAL) == 0 && (b->flags & BSF_GLOBAL) != 0)
2897 return 1;
2898
2899 if ((a->flags & BSF_FUNCTION) != 0 && (b->flags & BSF_FUNCTION) == 0)
2900 return -1;
2901
2902 if ((a->flags & BSF_FUNCTION) == 0 && (b->flags & BSF_FUNCTION) != 0)
2903 return 1;
2904
2905 if ((a->flags & BSF_WEAK) == 0 && (b->flags & BSF_WEAK) != 0)
2906 return -1;
2907
2908 if ((a->flags & BSF_WEAK) != 0 && (b->flags & BSF_WEAK) == 0)
2909 return 1;
2910
2911 if ((a->flags & BSF_DYNAMIC) != 0 && (b->flags & BSF_DYNAMIC) == 0)
2912 return -1;
2913
2914 if ((a->flags & BSF_DYNAMIC) == 0 && (b->flags & BSF_DYNAMIC) != 0)
2915 return 1;
2916
2917 return 0;
2918 }
2919
2920 /* Search SYMS for a symbol of the given VALUE. */
2921
2922 static asymbol *
2923 sym_exists_at (asymbol **syms, long lo, long hi, int id, bfd_vma value)
2924 {
2925 long mid;
2926
2927 if (id == -1)
2928 {
2929 while (lo < hi)
2930 {
2931 mid = (lo + hi) >> 1;
2932 if (syms[mid]->value + syms[mid]->section->vma < value)
2933 lo = mid + 1;
2934 else if (syms[mid]->value + syms[mid]->section->vma > value)
2935 hi = mid;
2936 else
2937 return syms[mid];
2938 }
2939 }
2940 else
2941 {
2942 while (lo < hi)
2943 {
2944 mid = (lo + hi) >> 1;
2945 if (syms[mid]->section->id < id)
2946 lo = mid + 1;
2947 else if (syms[mid]->section->id > id)
2948 hi = mid;
2949 else if (syms[mid]->value < value)
2950 lo = mid + 1;
2951 else if (syms[mid]->value > value)
2952 hi = mid;
2953 else
2954 return syms[mid];
2955 }
2956 }
2957 return NULL;
2958 }
2959
2960 static bfd_boolean
2961 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
2962 {
2963 bfd_vma vma = *(bfd_vma *) ptr;
2964 return ((section->flags & SEC_ALLOC) != 0
2965 && section->vma <= vma
2966 && vma < section->vma + section->size);
2967 }
2968
2969 /* Create synthetic symbols, effectively restoring "dot-symbol" function
2970 entry syms. Also generate @plt symbols for the glink branch table. */
2971
2972 static long
2973 ppc64_elf_get_synthetic_symtab (bfd *abfd,
2974 long static_count, asymbol **static_syms,
2975 long dyn_count, asymbol **dyn_syms,
2976 asymbol **ret)
2977 {
2978 asymbol *s;
2979 long i;
2980 long count;
2981 char *names;
2982 long symcount, codesecsym, codesecsymend, secsymend, opdsymend;
2983 asection *opd;
2984 bfd_boolean relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0;
2985 asymbol **syms;
2986
2987 *ret = NULL;
2988
2989 opd = bfd_get_section_by_name (abfd, ".opd");
2990 if (opd == NULL)
2991 return 0;
2992
2993 symcount = static_count;
2994 if (!relocatable)
2995 symcount += dyn_count;
2996 if (symcount == 0)
2997 return 0;
2998
2999 syms = bfd_malloc ((symcount + 1) * sizeof (*syms));
3000 if (syms == NULL)
3001 return -1;
3002
3003 if (!relocatable && static_count != 0 && dyn_count != 0)
3004 {
3005 /* Use both symbol tables. */
3006 memcpy (syms, static_syms, static_count * sizeof (*syms));
3007 memcpy (syms + static_count, dyn_syms, (dyn_count + 1) * sizeof (*syms));
3008 }
3009 else if (!relocatable && static_count == 0)
3010 memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms));
3011 else
3012 memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms));
3013
3014 synthetic_relocatable = relocatable;
3015 qsort (syms, symcount, sizeof (*syms), compare_symbols);
3016
3017 if (!relocatable && symcount > 1)
3018 {
3019 long j;
3020 /* Trim duplicate syms, since we may have merged the normal and
3021 dynamic symbols. Actually, we only care about syms that have
3022 different values, so trim any with the same value. */
3023 for (i = 1, j = 1; i < symcount; ++i)
3024 if (syms[i - 1]->value + syms[i - 1]->section->vma
3025 != syms[i]->value + syms[i]->section->vma)
3026 syms[j++] = syms[i];
3027 symcount = j;
3028 }
3029
3030 i = 0;
3031 if (strcmp (syms[i]->section->name, ".opd") == 0)
3032 ++i;
3033 codesecsym = i;
3034
3035 for (; i < symcount; ++i)
3036 if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3037 != (SEC_CODE | SEC_ALLOC))
3038 || (syms[i]->flags & BSF_SECTION_SYM) == 0)
3039 break;
3040 codesecsymend = i;
3041
3042 for (; i < symcount; ++i)
3043 if ((syms[i]->flags & BSF_SECTION_SYM) == 0)
3044 break;
3045 secsymend = i;
3046
3047 for (; i < symcount; ++i)
3048 if (strcmp (syms[i]->section->name, ".opd") != 0)
3049 break;
3050 opdsymend = i;
3051
3052 for (; i < symcount; ++i)
3053 if ((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3054 != (SEC_CODE | SEC_ALLOC))
3055 break;
3056 symcount = i;
3057
3058 count = 0;
3059
3060 if (relocatable)
3061 {
3062 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3063 arelent *r;
3064 size_t size;
3065 long relcount;
3066
3067 if (opdsymend == secsymend)
3068 goto done;
3069
3070 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3071 relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0;
3072 if (relcount == 0)
3073 goto done;
3074
3075 if (!(*slurp_relocs) (abfd, opd, static_syms, FALSE))
3076 {
3077 count = -1;
3078 goto done;
3079 }
3080
3081 size = 0;
3082 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3083 {
3084 asymbol *sym;
3085
3086 while (r < opd->relocation + relcount
3087 && r->address < syms[i]->value + opd->vma)
3088 ++r;
3089
3090 if (r == opd->relocation + relcount)
3091 break;
3092
3093 if (r->address != syms[i]->value + opd->vma)
3094 continue;
3095
3096 if (r->howto->type != R_PPC64_ADDR64)
3097 continue;
3098
3099 sym = *r->sym_ptr_ptr;
3100 if (!sym_exists_at (syms, opdsymend, symcount,
3101 sym->section->id, sym->value + r->addend))
3102 {
3103 ++count;
3104 size += sizeof (asymbol);
3105 size += strlen (syms[i]->name) + 2;
3106 }
3107 }
3108
3109 s = *ret = bfd_malloc (size);
3110 if (s == NULL)
3111 {
3112 count = -1;
3113 goto done;
3114 }
3115
3116 names = (char *) (s + count);
3117
3118 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3119 {
3120 asymbol *sym;
3121
3122 while (r < opd->relocation + relcount
3123 && r->address < syms[i]->value + opd->vma)
3124 ++r;
3125
3126 if (r == opd->relocation + relcount)
3127 break;
3128
3129 if (r->address != syms[i]->value + opd->vma)
3130 continue;
3131
3132 if (r->howto->type != R_PPC64_ADDR64)
3133 continue;
3134
3135 sym = *r->sym_ptr_ptr;
3136 if (!sym_exists_at (syms, opdsymend, symcount,
3137 sym->section->id, sym->value + r->addend))
3138 {
3139 size_t len;
3140
3141 *s = *syms[i];
3142 s->flags |= BSF_SYNTHETIC;
3143 s->section = sym->section;
3144 s->value = sym->value + r->addend;
3145 s->name = names;
3146 *names++ = '.';
3147 len = strlen (syms[i]->name);
3148 memcpy (names, syms[i]->name, len + 1);
3149 names += len + 1;
3150 /* Have udata.p point back to the original symbol this
3151 synthetic symbol was derived from. */
3152 s->udata.p = syms[i];
3153 s++;
3154 }
3155 }
3156 }
3157 else
3158 {
3159 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3160 bfd_byte *contents;
3161 size_t size;
3162 long plt_count = 0;
3163 bfd_vma glink_vma = 0, resolv_vma = 0;
3164 asection *dynamic, *glink = NULL, *relplt = NULL;
3165 arelent *p;
3166
3167 if (!bfd_malloc_and_get_section (abfd, opd, &contents))
3168 {
3169 if (contents)
3170 {
3171 free_contents_and_exit:
3172 free (contents);
3173 }
3174 count = -1;
3175 goto done;
3176 }
3177
3178 size = 0;
3179 for (i = secsymend; i < opdsymend; ++i)
3180 {
3181 bfd_vma ent;
3182
3183 /* Ignore bogus symbols. */
3184 if (syms[i]->value > opd->size - 8)
3185 continue;
3186
3187 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3188 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3189 {
3190 ++count;
3191 size += sizeof (asymbol);
3192 size += strlen (syms[i]->name) + 2;
3193 }
3194 }
3195
3196 /* Get start of .glink stubs from DT_PPC64_GLINK. */
3197 if (dyn_count != 0
3198 && (dynamic = bfd_get_section_by_name (abfd, ".dynamic")) != NULL)
3199 {
3200 bfd_byte *dynbuf, *extdyn, *extdynend;
3201 size_t extdynsize;
3202 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
3203
3204 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
3205 goto free_contents_and_exit;
3206
3207 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
3208 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
3209
3210 extdyn = dynbuf;
3211 extdynend = extdyn + dynamic->size;
3212 for (; extdyn < extdynend; extdyn += extdynsize)
3213 {
3214 Elf_Internal_Dyn dyn;
3215 (*swap_dyn_in) (abfd, extdyn, &dyn);
3216
3217 if (dyn.d_tag == DT_NULL)
3218 break;
3219
3220 if (dyn.d_tag == DT_PPC64_GLINK)
3221 {
3222 /* The first glink stub starts at offset 32; see comment in
3223 ppc64_elf_finish_dynamic_sections. */
3224 glink_vma = dyn.d_un.d_val + 32;
3225 /* The .glink section usually does not survive the final
3226 link; search for the section (usually .text) where the
3227 glink stubs now reside. */
3228 glink = bfd_sections_find_if (abfd, section_covers_vma,
3229 &glink_vma);
3230 break;
3231 }
3232 }
3233
3234 free (dynbuf);
3235 }
3236
3237 if (glink != NULL)
3238 {
3239 /* Determine __glink trampoline by reading the relative branch
3240 from the first glink stub. */
3241 bfd_byte buf[4];
3242 if (bfd_get_section_contents (abfd, glink, buf,
3243 glink_vma + 4 - glink->vma, 4))
3244 {
3245 unsigned int insn = bfd_get_32 (abfd, buf);
3246 insn ^= B_DOT;
3247 if ((insn & ~0x3fffffc) == 0)
3248 resolv_vma = glink_vma + 4 + (insn ^ 0x2000000) - 0x2000000;
3249 }
3250
3251 if (resolv_vma)
3252 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
3253
3254 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
3255 if (relplt != NULL)
3256 {
3257 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3258 if (! (*slurp_relocs) (abfd, relplt, dyn_syms, TRUE))
3259 goto free_contents_and_exit;
3260
3261 plt_count = relplt->size / sizeof (Elf64_External_Rela);
3262 size += plt_count * sizeof (asymbol);
3263
3264 p = relplt->relocation;
3265 for (i = 0; i < plt_count; i++, p++)
3266 {
3267 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
3268 if (p->addend != 0)
3269 size += sizeof ("+0x") - 1 + 16;
3270 }
3271 }
3272 }
3273
3274 s = *ret = bfd_malloc (size);
3275 if (s == NULL)
3276 goto free_contents_and_exit;
3277
3278 names = (char *) (s + count + plt_count + (resolv_vma != 0));
3279
3280 for (i = secsymend; i < opdsymend; ++i)
3281 {
3282 bfd_vma ent;
3283
3284 if (syms[i]->value > opd->size - 8)
3285 continue;
3286
3287 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3288 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3289 {
3290 long lo, hi;
3291 size_t len;
3292 asection *sec = abfd->sections;
3293
3294 *s = *syms[i];
3295 lo = codesecsym;
3296 hi = codesecsymend;
3297 while (lo < hi)
3298 {
3299 long mid = (lo + hi) >> 1;
3300 if (syms[mid]->section->vma < ent)
3301 lo = mid + 1;
3302 else if (syms[mid]->section->vma > ent)
3303 hi = mid;
3304 else
3305 {
3306 sec = syms[mid]->section;
3307 break;
3308 }
3309 }
3310
3311 if (lo >= hi && lo > codesecsym)
3312 sec = syms[lo - 1]->section;
3313
3314 for (; sec != NULL; sec = sec->next)
3315 {
3316 if (sec->vma > ent)
3317 break;
3318 if ((sec->flags & SEC_ALLOC) == 0
3319 || (sec->flags & SEC_LOAD) == 0)
3320 break;
3321 if ((sec->flags & SEC_CODE) != 0)
3322 s->section = sec;
3323 }
3324 s->flags |= BSF_SYNTHETIC;
3325 s->value = ent - s->section->vma;
3326 s->name = names;
3327 *names++ = '.';
3328 len = strlen (syms[i]->name);
3329 memcpy (names, syms[i]->name, len + 1);
3330 names += len + 1;
3331 /* Have udata.p point back to the original symbol this
3332 synthetic symbol was derived from. */
3333 s->udata.p = syms[i];
3334 s++;
3335 }
3336 }
3337 free (contents);
3338
3339 if (glink != NULL && relplt != NULL)
3340 {
3341 if (resolv_vma)
3342 {
3343 /* Add a symbol for the main glink trampoline. */
3344 memset (s, 0, sizeof *s);
3345 s->the_bfd = abfd;
3346 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3347 s->section = glink;
3348 s->value = resolv_vma - glink->vma;
3349 s->name = names;
3350 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3351 names += sizeof ("__glink_PLTresolve");
3352 s++;
3353 count++;
3354 }
3355
3356 /* FIXME: It would be very much nicer to put sym@plt on the
3357 stub rather than on the glink branch table entry. The
3358 objdump disassembler would then use a sensible symbol
3359 name on plt calls. The difficulty in doing so is
3360 a) finding the stubs, and,
3361 b) matching stubs against plt entries, and,
3362 c) there can be multiple stubs for a given plt entry.
3363
3364 Solving (a) could be done by code scanning, but older
3365 ppc64 binaries used different stubs to current code.
3366 (b) is the tricky one since you need to known the toc
3367 pointer for at least one function that uses a pic stub to
3368 be able to calculate the plt address referenced.
3369 (c) means gdb would need to set multiple breakpoints (or
3370 find the glink branch itself) when setting breakpoints
3371 for pending shared library loads. */
3372 p = relplt->relocation;
3373 for (i = 0; i < plt_count; i++, p++)
3374 {
3375 size_t len;
3376
3377 *s = **p->sym_ptr_ptr;
3378 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
3379 we are defining a symbol, ensure one of them is set. */
3380 if ((s->flags & BSF_LOCAL) == 0)
3381 s->flags |= BSF_GLOBAL;
3382 s->flags |= BSF_SYNTHETIC;
3383 s->section = glink;
3384 s->value = glink_vma - glink->vma;
3385 s->name = names;
3386 s->udata.p = NULL;
3387 len = strlen ((*p->sym_ptr_ptr)->name);
3388 memcpy (names, (*p->sym_ptr_ptr)->name, len);
3389 names += len;
3390 if (p->addend != 0)
3391 {
3392 memcpy (names, "+0x", sizeof ("+0x") - 1);
3393 names += sizeof ("+0x") - 1;
3394 bfd_sprintf_vma (abfd, names, p->addend);
3395 names += strlen (names);
3396 }
3397 memcpy (names, "@plt", sizeof ("@plt"));
3398 names += sizeof ("@plt");
3399 s++;
3400 glink_vma += 8;
3401 if (i >= 0x8000)
3402 glink_vma += 4;
3403 }
3404 count += plt_count;
3405 }
3406 }
3407
3408 done:
3409 free (syms);
3410 return count;
3411 }
3412 \f
3413 /* The following functions are specific to the ELF linker, while
3414 functions above are used generally. Those named ppc64_elf_* are
3415 called by the main ELF linker code. They appear in this file more
3416 or less in the order in which they are called. eg.
3417 ppc64_elf_check_relocs is called early in the link process,
3418 ppc64_elf_finish_dynamic_sections is one of the last functions
3419 called.
3420
3421 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
3422 functions have both a function code symbol and a function descriptor
3423 symbol. A call to foo in a relocatable object file looks like:
3424
3425 . .text
3426 . x:
3427 . bl .foo
3428 . nop
3429
3430 The function definition in another object file might be:
3431
3432 . .section .opd
3433 . foo: .quad .foo
3434 . .quad .TOC.@tocbase
3435 . .quad 0
3436 .
3437 . .text
3438 . .foo: blr
3439
3440 When the linker resolves the call during a static link, the branch
3441 unsurprisingly just goes to .foo and the .opd information is unused.
3442 If the function definition is in a shared library, things are a little
3443 different: The call goes via a plt call stub, the opd information gets
3444 copied to the plt, and the linker patches the nop.
3445
3446 . x:
3447 . bl .foo_stub
3448 . ld 2,40(1)
3449 .
3450 .
3451 . .foo_stub:
3452 . addis 12,2,Lfoo@toc@ha # in practice, the call stub
3453 . addi 12,12,Lfoo@toc@l # is slightly optimized, but
3454 . std 2,40(1) # this is the general idea
3455 . ld 11,0(12)
3456 . ld 2,8(12)
3457 . mtctr 11
3458 . ld 11,16(12)
3459 . bctr
3460 .
3461 . .section .plt
3462 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
3463
3464 The "reloc ()" notation is supposed to indicate that the linker emits
3465 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
3466 copying.
3467
3468 What are the difficulties here? Well, firstly, the relocations
3469 examined by the linker in check_relocs are against the function code
3470 sym .foo, while the dynamic relocation in the plt is emitted against
3471 the function descriptor symbol, foo. Somewhere along the line, we need
3472 to carefully copy dynamic link information from one symbol to the other.
3473 Secondly, the generic part of the elf linker will make .foo a dynamic
3474 symbol as is normal for most other backends. We need foo dynamic
3475 instead, at least for an application final link. However, when
3476 creating a shared library containing foo, we need to have both symbols
3477 dynamic so that references to .foo are satisfied during the early
3478 stages of linking. Otherwise the linker might decide to pull in a
3479 definition from some other object, eg. a static library.
3480
3481 Update: As of August 2004, we support a new convention. Function
3482 calls may use the function descriptor symbol, ie. "bl foo". This
3483 behaves exactly as "bl .foo". */
3484
3485 /* The linker needs to keep track of the number of relocs that it
3486 decides to copy as dynamic relocs in check_relocs for each symbol.
3487 This is so that it can later discard them if they are found to be
3488 unnecessary. We store the information in a field extending the
3489 regular ELF linker hash table. */
3490
3491 struct ppc_dyn_relocs
3492 {
3493 struct ppc_dyn_relocs *next;
3494
3495 /* The input section of the reloc. */
3496 asection *sec;
3497
3498 /* Total number of relocs copied for the input section. */
3499 bfd_size_type count;
3500
3501 /* Number of pc-relative relocs copied for the input section. */
3502 bfd_size_type pc_count;
3503 };
3504
3505 /* Of those relocs that might be copied as dynamic relocs, this function
3506 selects those that must be copied when linking a shared library,
3507 even when the symbol is local. */
3508
3509 static int
3510 must_be_dyn_reloc (struct bfd_link_info *info,
3511 enum elf_ppc64_reloc_type r_type)
3512 {
3513 switch (r_type)
3514 {
3515 default:
3516 return 1;
3517
3518 case R_PPC64_REL32:
3519 case R_PPC64_REL64:
3520 case R_PPC64_REL30:
3521 return 0;
3522
3523 case R_PPC64_TPREL16:
3524 case R_PPC64_TPREL16_LO:
3525 case R_PPC64_TPREL16_HI:
3526 case R_PPC64_TPREL16_HA:
3527 case R_PPC64_TPREL16_DS:
3528 case R_PPC64_TPREL16_LO_DS:
3529 case R_PPC64_TPREL16_HIGHER:
3530 case R_PPC64_TPREL16_HIGHERA:
3531 case R_PPC64_TPREL16_HIGHEST:
3532 case R_PPC64_TPREL16_HIGHESTA:
3533 case R_PPC64_TPREL64:
3534 return !info->executable;
3535 }
3536 }
3537
3538 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3539 copying dynamic variables from a shared lib into an app's dynbss
3540 section, and instead use a dynamic relocation to point into the
3541 shared lib. With code that gcc generates, it's vital that this be
3542 enabled; In the PowerPC64 ABI, the address of a function is actually
3543 the address of a function descriptor, which resides in the .opd
3544 section. gcc uses the descriptor directly rather than going via the
3545 GOT as some other ABI's do, which means that initialized function
3546 pointers must reference the descriptor. Thus, a function pointer
3547 initialized to the address of a function in a shared library will
3548 either require a copy reloc, or a dynamic reloc. Using a copy reloc
3549 redefines the function descriptor symbol to point to the copy. This
3550 presents a problem as a plt entry for that function is also
3551 initialized from the function descriptor symbol and the copy reloc
3552 may not be initialized first. */
3553 #define ELIMINATE_COPY_RELOCS 1
3554
3555 /* Section name for stubs is the associated section name plus this
3556 string. */
3557 #define STUB_SUFFIX ".stub"
3558
3559 /* Linker stubs.
3560 ppc_stub_long_branch:
3561 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
3562 destination, but a 24 bit branch in a stub section will reach.
3563 . b dest
3564
3565 ppc_stub_plt_branch:
3566 Similar to the above, but a 24 bit branch in the stub section won't
3567 reach its destination.
3568 . addis %r12,%r2,xxx@toc@ha
3569 . ld %r11,xxx@toc@l(%r12)
3570 . mtctr %r11
3571 . bctr
3572
3573 ppc_stub_plt_call:
3574 Used to call a function in a shared library. If it so happens that
3575 the plt entry referenced crosses a 64k boundary, then an extra
3576 "addi %r12,%r12,xxx@toc@l" will be inserted before the "mtctr".
3577 . addis %r12,%r2,xxx@toc@ha
3578 . std %r2,40(%r1)
3579 . ld %r11,xxx+0@toc@l(%r12)
3580 . mtctr %r11
3581 . ld %r2,xxx+8@toc@l(%r12)
3582 . ld %r11,xxx+16@toc@l(%r12)
3583 . bctr
3584
3585 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
3586 code to adjust the value and save r2 to support multiple toc sections.
3587 A ppc_stub_long_branch with an r2 offset looks like:
3588 . std %r2,40(%r1)
3589 . addis %r2,%r2,off@ha
3590 . addi %r2,%r2,off@l
3591 . b dest
3592
3593 A ppc_stub_plt_branch with an r2 offset looks like:
3594 . std %r2,40(%r1)
3595 . addis %r12,%r2,xxx@toc@ha
3596 . ld %r11,xxx@toc@l(%r12)
3597 . addis %r2,%r2,off@ha
3598 . addi %r2,%r2,off@l
3599 . mtctr %r11
3600 . bctr
3601
3602 In cases where the "addis" instruction would add zero, the "addis" is
3603 omitted and following instructions modified slightly in some cases.
3604 */
3605
3606 enum ppc_stub_type {
3607 ppc_stub_none,
3608 ppc_stub_long_branch,
3609 ppc_stub_long_branch_r2off,
3610 ppc_stub_plt_branch,
3611 ppc_stub_plt_branch_r2off,
3612 ppc_stub_plt_call
3613 };
3614
3615 struct ppc_stub_hash_entry {
3616
3617 /* Base hash table entry structure. */
3618 struct bfd_hash_entry root;
3619
3620 enum ppc_stub_type stub_type;
3621
3622 /* The stub section. */
3623 asection *stub_sec;
3624
3625 /* Offset within stub_sec of the beginning of this stub. */
3626 bfd_vma stub_offset;
3627
3628 /* Given the symbol's value and its section we can determine its final
3629 value when building the stubs (so the stub knows where to jump. */
3630 bfd_vma target_value;
3631 asection *target_section;
3632
3633 /* The symbol table entry, if any, that this was derived from. */
3634 struct ppc_link_hash_entry *h;
3635 struct plt_entry *plt_ent;
3636
3637 /* And the reloc addend that this was derived from. */
3638 bfd_vma addend;
3639
3640 /* Where this stub is being called from, or, in the case of combined
3641 stub sections, the first input section in the group. */
3642 asection *id_sec;
3643 };
3644
3645 struct ppc_branch_hash_entry {
3646
3647 /* Base hash table entry structure. */
3648 struct bfd_hash_entry root;
3649
3650 /* Offset within branch lookup table. */
3651 unsigned int offset;
3652
3653 /* Generation marker. */
3654 unsigned int iter;
3655 };
3656
3657 struct ppc_link_hash_entry
3658 {
3659 struct elf_link_hash_entry elf;
3660
3661 union {
3662 /* A pointer to the most recently used stub hash entry against this
3663 symbol. */
3664 struct ppc_stub_hash_entry *stub_cache;
3665
3666 /* A pointer to the next symbol starting with a '.' */
3667 struct ppc_link_hash_entry *next_dot_sym;
3668 } u;
3669
3670 /* Track dynamic relocs copied for this symbol. */
3671 struct ppc_dyn_relocs *dyn_relocs;
3672
3673 /* Link between function code and descriptor symbols. */
3674 struct ppc_link_hash_entry *oh;
3675
3676 /* Flag function code and descriptor symbols. */
3677 unsigned int is_func:1;
3678 unsigned int is_func_descriptor:1;
3679 unsigned int fake:1;
3680
3681 /* Whether global opd/toc sym has been adjusted or not.
3682 After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
3683 should be set for all globals defined in any opd/toc section. */
3684 unsigned int adjust_done:1;
3685
3686 /* Set if we twiddled this symbol to weak at some stage. */
3687 unsigned int was_undefined:1;
3688
3689 /* Contexts in which symbol is used in the GOT (or TOC).
3690 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
3691 corresponding relocs are encountered during check_relocs.
3692 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3693 indicate the corresponding GOT entry type is not needed.
3694 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
3695 a TPREL one. We use a separate flag rather than setting TPREL
3696 just for convenience in distinguishing the two cases. */
3697 #define TLS_GD 1 /* GD reloc. */
3698 #define TLS_LD 2 /* LD reloc. */
3699 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3700 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3701 #define TLS_TLS 16 /* Any TLS reloc. */
3702 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
3703 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
3704 #define PLT_IFUNC 128 /* STT_GNU_IFUNC. */
3705 unsigned char tls_mask;
3706 };
3707
3708 /* ppc64 ELF linker hash table. */
3709
3710 struct ppc_link_hash_table
3711 {
3712 struct elf_link_hash_table elf;
3713
3714 /* The stub hash table. */
3715 struct bfd_hash_table stub_hash_table;
3716
3717 /* Another hash table for plt_branch stubs. */
3718 struct bfd_hash_table branch_hash_table;
3719
3720 /* Linker stub bfd. */
3721 bfd *stub_bfd;
3722
3723 /* Linker call-backs. */
3724 asection * (*add_stub_section) (const char *, asection *);
3725 void (*layout_sections_again) (void);
3726
3727 /* Array to keep track of which stub sections have been created, and
3728 information on stub grouping. */
3729 struct map_stub {
3730 /* This is the section to which stubs in the group will be attached. */
3731 asection *link_sec;
3732 /* The stub section. */
3733 asection *stub_sec;
3734 /* Along with elf_gp, specifies the TOC pointer used in this group. */
3735 bfd_vma toc_off;
3736 } *stub_group;
3737
3738 /* Temp used when calculating TOC pointers. */
3739 bfd_vma toc_curr;
3740 bfd *toc_bfd;
3741 asection *toc_first_sec;
3742
3743 /* Highest input section id. */
3744 int top_id;
3745
3746 /* Highest output section index. */
3747 int top_index;
3748
3749 /* Used when adding symbols. */
3750 struct ppc_link_hash_entry *dot_syms;
3751
3752 /* List of input sections for each output section. */
3753 asection **input_list;
3754
3755 /* Short-cuts to get to dynamic linker sections. */
3756 asection *got;
3757 asection *plt;
3758 asection *relplt;
3759 asection *iplt;
3760 asection *reliplt;
3761 asection *dynbss;
3762 asection *relbss;
3763 asection *glink;
3764 asection *sfpr;
3765 asection *brlt;
3766 asection *relbrlt;
3767
3768 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
3769 struct ppc_link_hash_entry *tls_get_addr;
3770 struct ppc_link_hash_entry *tls_get_addr_fd;
3771
3772 /* The size of reliplt used by got entry relocs. */
3773 bfd_size_type got_reli_size;
3774
3775 /* Statistics. */
3776 unsigned long stub_count[ppc_stub_plt_call];
3777
3778 /* Number of stubs against global syms. */
3779 unsigned long stub_globals;
3780
3781 /* Set if we should emit symbols for stubs. */
3782 unsigned int emit_stub_syms:1;
3783
3784 /* Set if __tls_get_addr optimization should not be done. */
3785 unsigned int no_tls_get_addr_opt:1;
3786
3787 /* Support for multiple toc sections. */
3788 unsigned int do_multi_toc:1;
3789 unsigned int multi_toc_needed:1;
3790 unsigned int second_toc_pass:1;
3791 unsigned int do_toc_opt:1;
3792
3793 /* Set on error. */
3794 unsigned int stub_error:1;
3795
3796 /* Temp used by ppc64_elf_process_dot_syms. */
3797 unsigned int twiddled_syms:1;
3798
3799 /* Incremented every time we size stubs. */
3800 unsigned int stub_iteration;
3801
3802 /* Small local sym cache. */
3803 struct sym_cache sym_cache;
3804 };
3805
3806 /* Rename some of the generic section flags to better document how they
3807 are used here. */
3808
3809 /* Nonzero if this section has TLS related relocations. */
3810 #define has_tls_reloc sec_flg0
3811
3812 /* Nonzero if this section has a call to __tls_get_addr. */
3813 #define has_tls_get_addr_call sec_flg1
3814
3815 /* Nonzero if this section has any toc or got relocs. */
3816 #define has_toc_reloc sec_flg2
3817
3818 /* Nonzero if this section has a call to another section that uses
3819 the toc or got. */
3820 #define makes_toc_func_call sec_flg3
3821
3822 /* Recursion protection when determining above flag. */
3823 #define call_check_in_progress sec_flg4
3824 #define call_check_done sec_flg5
3825
3826 /* Get the ppc64 ELF linker hash table from a link_info structure. */
3827
3828 #define ppc_hash_table(p) \
3829 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
3830 == PPC64_ELF_DATA ? ((struct ppc_link_hash_table *) ((p)->hash)) : NULL)
3831
3832 #define ppc_stub_hash_lookup(table, string, create, copy) \
3833 ((struct ppc_stub_hash_entry *) \
3834 bfd_hash_lookup ((table), (string), (create), (copy)))
3835
3836 #define ppc_branch_hash_lookup(table, string, create, copy) \
3837 ((struct ppc_branch_hash_entry *) \
3838 bfd_hash_lookup ((table), (string), (create), (copy)))
3839
3840 /* Create an entry in the stub hash table. */
3841
3842 static struct bfd_hash_entry *
3843 stub_hash_newfunc (struct bfd_hash_entry *entry,
3844 struct bfd_hash_table *table,
3845 const char *string)
3846 {
3847 /* Allocate the structure if it has not already been allocated by a
3848 subclass. */
3849 if (entry == NULL)
3850 {
3851 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
3852 if (entry == NULL)
3853 return entry;
3854 }
3855
3856 /* Call the allocation method of the superclass. */
3857 entry = bfd_hash_newfunc (entry, table, string);
3858 if (entry != NULL)
3859 {
3860 struct ppc_stub_hash_entry *eh;
3861
3862 /* Initialize the local fields. */
3863 eh = (struct ppc_stub_hash_entry *) entry;
3864 eh->stub_type = ppc_stub_none;
3865 eh->stub_sec = NULL;
3866 eh->stub_offset = 0;
3867 eh->target_value = 0;
3868 eh->target_section = NULL;
3869 eh->h = NULL;
3870 eh->id_sec = NULL;
3871 }
3872
3873 return entry;
3874 }
3875
3876 /* Create an entry in the branch hash table. */
3877
3878 static struct bfd_hash_entry *
3879 branch_hash_newfunc (struct bfd_hash_entry *entry,
3880 struct bfd_hash_table *table,
3881 const char *string)
3882 {
3883 /* Allocate the structure if it has not already been allocated by a
3884 subclass. */
3885 if (entry == NULL)
3886 {
3887 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
3888 if (entry == NULL)
3889 return entry;
3890 }
3891
3892 /* Call the allocation method of the superclass. */
3893 entry = bfd_hash_newfunc (entry, table, string);
3894 if (entry != NULL)
3895 {
3896 struct ppc_branch_hash_entry *eh;
3897
3898 /* Initialize the local fields. */
3899 eh = (struct ppc_branch_hash_entry *) entry;
3900 eh->offset = 0;
3901 eh->iter = 0;
3902 }
3903
3904 return entry;
3905 }
3906
3907 /* Create an entry in a ppc64 ELF linker hash table. */
3908
3909 static struct bfd_hash_entry *
3910 link_hash_newfunc (struct bfd_hash_entry *entry,
3911 struct bfd_hash_table *table,
3912 const char *string)
3913 {
3914 /* Allocate the structure if it has not already been allocated by a
3915 subclass. */
3916 if (entry == NULL)
3917 {
3918 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
3919 if (entry == NULL)
3920 return entry;
3921 }
3922
3923 /* Call the allocation method of the superclass. */
3924 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
3925 if (entry != NULL)
3926 {
3927 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
3928
3929 memset (&eh->u.stub_cache, 0,
3930 (sizeof (struct ppc_link_hash_entry)
3931 - offsetof (struct ppc_link_hash_entry, u.stub_cache)));
3932
3933 /* When making function calls, old ABI code references function entry
3934 points (dot symbols), while new ABI code references the function
3935 descriptor symbol. We need to make any combination of reference and
3936 definition work together, without breaking archive linking.
3937
3938 For a defined function "foo" and an undefined call to "bar":
3939 An old object defines "foo" and ".foo", references ".bar" (possibly
3940 "bar" too).
3941 A new object defines "foo" and references "bar".
3942
3943 A new object thus has no problem with its undefined symbols being
3944 satisfied by definitions in an old object. On the other hand, the
3945 old object won't have ".bar" satisfied by a new object.
3946
3947 Keep a list of newly added dot-symbols. */
3948
3949 if (string[0] == '.')
3950 {
3951 struct ppc_link_hash_table *htab;
3952
3953 htab = (struct ppc_link_hash_table *) table;
3954 eh->u.next_dot_sym = htab->dot_syms;
3955 htab->dot_syms = eh;
3956 }
3957 }
3958
3959 return entry;
3960 }
3961
3962 /* Create a ppc64 ELF linker hash table. */
3963
3964 static struct bfd_link_hash_table *
3965 ppc64_elf_link_hash_table_create (bfd *abfd)
3966 {
3967 struct ppc_link_hash_table *htab;
3968 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
3969
3970 htab = bfd_zmalloc (amt);
3971 if (htab == NULL)
3972 return NULL;
3973
3974 if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc,
3975 sizeof (struct ppc_link_hash_entry),
3976 PPC64_ELF_DATA))
3977 {
3978 free (htab);
3979 return NULL;
3980 }
3981
3982 /* Init the stub hash table too. */
3983 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc,
3984 sizeof (struct ppc_stub_hash_entry)))
3985 return NULL;
3986
3987 /* And the branch hash table. */
3988 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc,
3989 sizeof (struct ppc_branch_hash_entry)))
3990 return NULL;
3991
3992 /* Initializing two fields of the union is just cosmetic. We really
3993 only care about glist, but when compiled on a 32-bit host the
3994 bfd_vma fields are larger. Setting the bfd_vma to zero makes
3995 debugger inspection of these fields look nicer. */
3996 htab->elf.init_got_refcount.refcount = 0;
3997 htab->elf.init_got_refcount.glist = NULL;
3998 htab->elf.init_plt_refcount.refcount = 0;
3999 htab->elf.init_plt_refcount.glist = NULL;
4000 htab->elf.init_got_offset.offset = 0;
4001 htab->elf.init_got_offset.glist = NULL;
4002 htab->elf.init_plt_offset.offset = 0;
4003 htab->elf.init_plt_offset.glist = NULL;
4004
4005 return &htab->elf.root;
4006 }
4007
4008 /* Free the derived linker hash table. */
4009
4010 static void
4011 ppc64_elf_link_hash_table_free (struct bfd_link_hash_table *hash)
4012 {
4013 struct ppc_link_hash_table *ret = (struct ppc_link_hash_table *) hash;
4014
4015 bfd_hash_table_free (&ret->stub_hash_table);
4016 bfd_hash_table_free (&ret->branch_hash_table);
4017 _bfd_generic_link_hash_table_free (hash);
4018 }
4019
4020 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
4021
4022 void
4023 ppc64_elf_init_stub_bfd (bfd *abfd, struct bfd_link_info *info)
4024 {
4025 struct ppc_link_hash_table *htab;
4026
4027 elf_elfheader (abfd)->e_ident[EI_CLASS] = ELFCLASS64;
4028
4029 /* Always hook our dynamic sections into the first bfd, which is the
4030 linker created stub bfd. This ensures that the GOT header is at
4031 the start of the output TOC section. */
4032 htab = ppc_hash_table (info);
4033 if (htab == NULL)
4034 return;
4035 htab->stub_bfd = abfd;
4036 htab->elf.dynobj = abfd;
4037 }
4038
4039 /* Build a name for an entry in the stub hash table. */
4040
4041 static char *
4042 ppc_stub_name (const asection *input_section,
4043 const asection *sym_sec,
4044 const struct ppc_link_hash_entry *h,
4045 const Elf_Internal_Rela *rel)
4046 {
4047 char *stub_name;
4048 bfd_size_type len;
4049
4050 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
4051 offsets from a sym as a branch target? In fact, we could
4052 probably assume the addend is always zero. */
4053 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
4054
4055 if (h)
4056 {
4057 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
4058 stub_name = bfd_malloc (len);
4059 if (stub_name == NULL)
4060 return stub_name;
4061
4062 sprintf (stub_name, "%08x.%s+%x",
4063 input_section->id & 0xffffffff,
4064 h->elf.root.root.string,
4065 (int) rel->r_addend & 0xffffffff);
4066 }
4067 else
4068 {
4069 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
4070 stub_name = bfd_malloc (len);
4071 if (stub_name == NULL)
4072 return stub_name;
4073
4074 sprintf (stub_name, "%08x.%x:%x+%x",
4075 input_section->id & 0xffffffff,
4076 sym_sec->id & 0xffffffff,
4077 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
4078 (int) rel->r_addend & 0xffffffff);
4079 }
4080 if (stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
4081 stub_name[len - 2] = 0;
4082 return stub_name;
4083 }
4084
4085 /* Look up an entry in the stub hash. Stub entries are cached because
4086 creating the stub name takes a bit of time. */
4087
4088 static struct ppc_stub_hash_entry *
4089 ppc_get_stub_entry (const asection *input_section,
4090 const asection *sym_sec,
4091 struct ppc_link_hash_entry *h,
4092 const Elf_Internal_Rela *rel,
4093 struct ppc_link_hash_table *htab)
4094 {
4095 struct ppc_stub_hash_entry *stub_entry;
4096 const asection *id_sec;
4097
4098 /* If this input section is part of a group of sections sharing one
4099 stub section, then use the id of the first section in the group.
4100 Stub names need to include a section id, as there may well be
4101 more than one stub used to reach say, printf, and we need to
4102 distinguish between them. */
4103 id_sec = htab->stub_group[input_section->id].link_sec;
4104
4105 if (h != NULL && h->u.stub_cache != NULL
4106 && h->u.stub_cache->h == h
4107 && h->u.stub_cache->id_sec == id_sec)
4108 {
4109 stub_entry = h->u.stub_cache;
4110 }
4111 else
4112 {
4113 char *stub_name;
4114
4115 stub_name = ppc_stub_name (id_sec, sym_sec, h, rel);
4116 if (stub_name == NULL)
4117 return NULL;
4118
4119 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
4120 stub_name, FALSE, FALSE);
4121 if (h != NULL)
4122 h->u.stub_cache = stub_entry;
4123
4124 free (stub_name);
4125 }
4126
4127 return stub_entry;
4128 }
4129
4130 /* Add a new stub entry to the stub hash. Not all fields of the new
4131 stub entry are initialised. */
4132
4133 static struct ppc_stub_hash_entry *
4134 ppc_add_stub (const char *stub_name,
4135 asection *section,
4136 struct ppc_link_hash_table *htab)
4137 {
4138 asection *link_sec;
4139 asection *stub_sec;
4140 struct ppc_stub_hash_entry *stub_entry;
4141
4142 link_sec = htab->stub_group[section->id].link_sec;
4143 stub_sec = htab->stub_group[section->id].stub_sec;
4144 if (stub_sec == NULL)
4145 {
4146 stub_sec = htab->stub_group[link_sec->id].stub_sec;
4147 if (stub_sec == NULL)
4148 {
4149 size_t namelen;
4150 bfd_size_type len;
4151 char *s_name;
4152
4153 namelen = strlen (link_sec->name);
4154 len = namelen + sizeof (STUB_SUFFIX);
4155 s_name = bfd_alloc (htab->stub_bfd, len);
4156 if (s_name == NULL)
4157 return NULL;
4158
4159 memcpy (s_name, link_sec->name, namelen);
4160 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
4161 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
4162 if (stub_sec == NULL)
4163 return NULL;
4164 htab->stub_group[link_sec->id].stub_sec = stub_sec;
4165 }
4166 htab->stub_group[section->id].stub_sec = stub_sec;
4167 }
4168
4169 /* Enter this entry into the linker stub hash table. */
4170 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
4171 TRUE, FALSE);
4172 if (stub_entry == NULL)
4173 {
4174 (*_bfd_error_handler) (_("%B: cannot create stub entry %s"),
4175 section->owner, stub_name);
4176 return NULL;
4177 }
4178
4179 stub_entry->stub_sec = stub_sec;
4180 stub_entry->stub_offset = 0;
4181 stub_entry->id_sec = link_sec;
4182 return stub_entry;
4183 }
4184
4185 /* Create sections for linker generated code. */
4186
4187 static bfd_boolean
4188 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
4189 {
4190 struct ppc_link_hash_table *htab;
4191 flagword flags;
4192
4193 htab = ppc_hash_table (info);
4194 if (htab == NULL)
4195 return FALSE;
4196
4197 /* Create .sfpr for code to save and restore fp regs. */
4198 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
4199 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4200 htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr",
4201 flags);
4202 if (htab->sfpr == NULL
4203 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
4204 return FALSE;
4205
4206 /* Create .glink for lazy dynamic linking support. */
4207 htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink",
4208 flags);
4209 if (htab->glink == NULL
4210 || ! bfd_set_section_alignment (dynobj, htab->glink, 3))
4211 return FALSE;
4212
4213 flags = SEC_ALLOC | SEC_LINKER_CREATED;
4214 htab->iplt = bfd_make_section_anyway_with_flags (dynobj, ".iplt", flags);
4215 if (htab->iplt == NULL
4216 || ! bfd_set_section_alignment (dynobj, htab->iplt, 3))
4217 return FALSE;
4218
4219 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4220 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4221 htab->reliplt = bfd_make_section_anyway_with_flags (dynobj,
4222 ".rela.iplt",
4223 flags);
4224 if (htab->reliplt == NULL
4225 || ! bfd_set_section_alignment (dynobj, htab->reliplt, 3))
4226 return FALSE;
4227
4228 /* Create branch lookup table for plt_branch stubs. */
4229 flags = (SEC_ALLOC | SEC_LOAD
4230 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4231 htab->brlt = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt",
4232 flags);
4233 if (htab->brlt == NULL
4234 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
4235 return FALSE;
4236
4237 if (!info->shared)
4238 return TRUE;
4239
4240 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4241 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4242 htab->relbrlt = bfd_make_section_anyway_with_flags (dynobj,
4243 ".rela.branch_lt",
4244 flags);
4245 if (htab->relbrlt == NULL
4246 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
4247 return FALSE;
4248
4249 return TRUE;
4250 }
4251
4252 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
4253 not already done. */
4254
4255 static bfd_boolean
4256 create_got_section (bfd *abfd, struct bfd_link_info *info)
4257 {
4258 asection *got, *relgot;
4259 flagword flags;
4260 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4261
4262 if (!is_ppc64_elf (abfd))
4263 return FALSE;
4264 if (htab == NULL)
4265 return FALSE;
4266
4267 if (!htab->got)
4268 {
4269 if (! _bfd_elf_create_got_section (htab->elf.dynobj, info))
4270 return FALSE;
4271
4272 htab->got = bfd_get_section_by_name (htab->elf.dynobj, ".got");
4273 if (!htab->got)
4274 abort ();
4275 }
4276
4277 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
4278 | SEC_LINKER_CREATED);
4279
4280 got = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
4281 if (!got
4282 || !bfd_set_section_alignment (abfd, got, 3))
4283 return FALSE;
4284
4285 relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got",
4286 flags | SEC_READONLY);
4287 if (!relgot
4288 || ! bfd_set_section_alignment (abfd, relgot, 3))
4289 return FALSE;
4290
4291 ppc64_elf_tdata (abfd)->got = got;
4292 ppc64_elf_tdata (abfd)->relgot = relgot;
4293 return TRUE;
4294 }
4295
4296 /* Create the dynamic sections, and set up shortcuts. */
4297
4298 static bfd_boolean
4299 ppc64_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
4300 {
4301 struct ppc_link_hash_table *htab;
4302
4303 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
4304 return FALSE;
4305
4306 htab = ppc_hash_table (info);
4307 if (htab == NULL)
4308 return FALSE;
4309
4310 if (!htab->got)
4311 htab->got = bfd_get_section_by_name (dynobj, ".got");
4312 htab->plt = bfd_get_section_by_name (dynobj, ".plt");
4313 htab->relplt = bfd_get_section_by_name (dynobj, ".rela.plt");
4314 htab->dynbss = bfd_get_section_by_name (dynobj, ".dynbss");
4315 if (!info->shared)
4316 htab->relbss = bfd_get_section_by_name (dynobj, ".rela.bss");
4317
4318 if (!htab->got || !htab->plt || !htab->relplt || !htab->dynbss
4319 || (!info->shared && !htab->relbss))
4320 abort ();
4321
4322 return TRUE;
4323 }
4324
4325 /* Follow indirect and warning symbol links. */
4326
4327 static inline struct bfd_link_hash_entry *
4328 follow_link (struct bfd_link_hash_entry *h)
4329 {
4330 while (h->type == bfd_link_hash_indirect
4331 || h->type == bfd_link_hash_warning)
4332 h = h->u.i.link;
4333 return h;
4334 }
4335
4336 static inline struct elf_link_hash_entry *
4337 elf_follow_link (struct elf_link_hash_entry *h)
4338 {
4339 return (struct elf_link_hash_entry *) follow_link (&h->root);
4340 }
4341
4342 static inline struct ppc_link_hash_entry *
4343 ppc_follow_link (struct ppc_link_hash_entry *h)
4344 {
4345 return (struct ppc_link_hash_entry *) follow_link (&h->elf.root);
4346 }
4347
4348 /* Merge PLT info on FROM with that on TO. */
4349
4350 static void
4351 move_plt_plist (struct ppc_link_hash_entry *from,
4352 struct ppc_link_hash_entry *to)
4353 {
4354 if (from->elf.plt.plist != NULL)
4355 {
4356 if (to->elf.plt.plist != NULL)
4357 {
4358 struct plt_entry **entp;
4359 struct plt_entry *ent;
4360
4361 for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; )
4362 {
4363 struct plt_entry *dent;
4364
4365 for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next)
4366 if (dent->addend == ent->addend)
4367 {
4368 dent->plt.refcount += ent->plt.refcount;
4369 *entp = ent->next;
4370 break;
4371 }
4372 if (dent == NULL)
4373 entp = &ent->next;
4374 }
4375 *entp = to->elf.plt.plist;
4376 }
4377
4378 to->elf.plt.plist = from->elf.plt.plist;
4379 from->elf.plt.plist = NULL;
4380 }
4381 }
4382
4383 /* Copy the extra info we tack onto an elf_link_hash_entry. */
4384
4385 static void
4386 ppc64_elf_copy_indirect_symbol (struct bfd_link_info *info,
4387 struct elf_link_hash_entry *dir,
4388 struct elf_link_hash_entry *ind)
4389 {
4390 struct ppc_link_hash_entry *edir, *eind;
4391
4392 edir = (struct ppc_link_hash_entry *) dir;
4393 eind = (struct ppc_link_hash_entry *) ind;
4394
4395 /* Copy over any dynamic relocs we may have on the indirect sym. */
4396 if (eind->dyn_relocs != NULL)
4397 {
4398 if (edir->dyn_relocs != NULL)
4399 {
4400 struct ppc_dyn_relocs **pp;
4401 struct ppc_dyn_relocs *p;
4402
4403 /* Add reloc counts against the indirect sym to the direct sym
4404 list. Merge any entries against the same section. */
4405 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
4406 {
4407 struct ppc_dyn_relocs *q;
4408
4409 for (q = edir->dyn_relocs; q != NULL; q = q->next)
4410 if (q->sec == p->sec)
4411 {
4412 q->pc_count += p->pc_count;
4413 q->count += p->count;
4414 *pp = p->next;
4415 break;
4416 }
4417 if (q == NULL)
4418 pp = &p->next;
4419 }
4420 *pp = edir->dyn_relocs;
4421 }
4422
4423 edir->dyn_relocs = eind->dyn_relocs;
4424 eind->dyn_relocs = NULL;
4425 }
4426
4427 edir->is_func |= eind->is_func;
4428 edir->is_func_descriptor |= eind->is_func_descriptor;
4429 edir->tls_mask |= eind->tls_mask;
4430 if (eind->oh != NULL)
4431 edir->oh = ppc_follow_link (eind->oh);
4432
4433 /* If called to transfer flags for a weakdef during processing
4434 of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF.
4435 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
4436 if (!(ELIMINATE_COPY_RELOCS
4437 && eind->elf.root.type != bfd_link_hash_indirect
4438 && edir->elf.dynamic_adjusted))
4439 edir->elf.non_got_ref |= eind->elf.non_got_ref;
4440
4441 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
4442 edir->elf.ref_regular |= eind->elf.ref_regular;
4443 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
4444 edir->elf.needs_plt |= eind->elf.needs_plt;
4445
4446 /* If we were called to copy over info for a weak sym, that's all. */
4447 if (eind->elf.root.type != bfd_link_hash_indirect)
4448 return;
4449
4450 /* Copy over got entries that we may have already seen to the
4451 symbol which just became indirect. */
4452 if (eind->elf.got.glist != NULL)
4453 {
4454 if (edir->elf.got.glist != NULL)
4455 {
4456 struct got_entry **entp;
4457 struct got_entry *ent;
4458
4459 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
4460 {
4461 struct got_entry *dent;
4462
4463 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
4464 if (dent->addend == ent->addend
4465 && dent->owner == ent->owner
4466 && dent->tls_type == ent->tls_type)
4467 {
4468 dent->got.refcount += ent->got.refcount;
4469 *entp = ent->next;
4470 break;
4471 }
4472 if (dent == NULL)
4473 entp = &ent->next;
4474 }
4475 *entp = edir->elf.got.glist;
4476 }
4477
4478 edir->elf.got.glist = eind->elf.got.glist;
4479 eind->elf.got.glist = NULL;
4480 }
4481
4482 /* And plt entries. */
4483 move_plt_plist (eind, edir);
4484
4485 if (eind->elf.dynindx != -1)
4486 {
4487 if (edir->elf.dynindx != -1)
4488 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4489 edir->elf.dynstr_index);
4490 edir->elf.dynindx = eind->elf.dynindx;
4491 edir->elf.dynstr_index = eind->elf.dynstr_index;
4492 eind->elf.dynindx = -1;
4493 eind->elf.dynstr_index = 0;
4494 }
4495 }
4496
4497 /* Find the function descriptor hash entry from the given function code
4498 hash entry FH. Link the entries via their OH fields. */
4499
4500 static struct ppc_link_hash_entry *
4501 lookup_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
4502 {
4503 struct ppc_link_hash_entry *fdh = fh->oh;
4504
4505 if (fdh == NULL)
4506 {
4507 const char *fd_name = fh->elf.root.root.string + 1;
4508
4509 fdh = (struct ppc_link_hash_entry *)
4510 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
4511 if (fdh == NULL)
4512 return fdh;
4513
4514 fdh->is_func_descriptor = 1;
4515 fdh->oh = fh;
4516 fh->is_func = 1;
4517 fh->oh = fdh;
4518 }
4519
4520 return ppc_follow_link (fdh);
4521 }
4522
4523 /* Make a fake function descriptor sym for the code sym FH. */
4524
4525 static struct ppc_link_hash_entry *
4526 make_fdh (struct bfd_link_info *info,
4527 struct ppc_link_hash_entry *fh)
4528 {
4529 bfd *abfd;
4530 asymbol *newsym;
4531 struct bfd_link_hash_entry *bh;
4532 struct ppc_link_hash_entry *fdh;
4533
4534 abfd = fh->elf.root.u.undef.abfd;
4535 newsym = bfd_make_empty_symbol (abfd);
4536 newsym->name = fh->elf.root.root.string + 1;
4537 newsym->section = bfd_und_section_ptr;
4538 newsym->value = 0;
4539 newsym->flags = BSF_WEAK;
4540
4541 bh = NULL;
4542 if (!_bfd_generic_link_add_one_symbol (info, abfd, newsym->name,
4543 newsym->flags, newsym->section,
4544 newsym->value, NULL, FALSE, FALSE,
4545 &bh))
4546 return NULL;
4547
4548 fdh = (struct ppc_link_hash_entry *) bh;
4549 fdh->elf.non_elf = 0;
4550 fdh->fake = 1;
4551 fdh->is_func_descriptor = 1;
4552 fdh->oh = fh;
4553 fh->is_func = 1;
4554 fh->oh = fdh;
4555 return fdh;
4556 }
4557
4558 /* Fix function descriptor symbols defined in .opd sections to be
4559 function type. */
4560
4561 static bfd_boolean
4562 ppc64_elf_add_symbol_hook (bfd *ibfd,
4563 struct bfd_link_info *info,
4564 Elf_Internal_Sym *isym,
4565 const char **name ATTRIBUTE_UNUSED,
4566 flagword *flags ATTRIBUTE_UNUSED,
4567 asection **sec,
4568 bfd_vma *value ATTRIBUTE_UNUSED)
4569 {
4570 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
4571 {
4572 if ((ibfd->flags & DYNAMIC) == 0)
4573 elf_tdata (info->output_bfd)->has_ifunc_symbols = TRUE;
4574 }
4575 else if (ELF_ST_TYPE (isym->st_info) == STT_FUNC)
4576 ;
4577 else if (*sec != NULL
4578 && strcmp ((*sec)->name, ".opd") == 0)
4579 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
4580
4581 return TRUE;
4582 }
4583
4584 /* This function makes an old ABI object reference to ".bar" cause the
4585 inclusion of a new ABI object archive that defines "bar".
4586 NAME is a symbol defined in an archive. Return a symbol in the hash
4587 table that might be satisfied by the archive symbols. */
4588
4589 static struct elf_link_hash_entry *
4590 ppc64_elf_archive_symbol_lookup (bfd *abfd,
4591 struct bfd_link_info *info,
4592 const char *name)
4593 {
4594 struct elf_link_hash_entry *h;
4595 char *dot_name;
4596 size_t len;
4597
4598 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
4599 if (h != NULL
4600 /* Don't return this sym if it is a fake function descriptor
4601 created by add_symbol_adjust. */
4602 && !(h->root.type == bfd_link_hash_undefweak
4603 && ((struct ppc_link_hash_entry *) h)->fake))
4604 return h;
4605
4606 if (name[0] == '.')
4607 return h;
4608
4609 len = strlen (name);
4610 dot_name = bfd_alloc (abfd, len + 2);
4611 if (dot_name == NULL)
4612 return (struct elf_link_hash_entry *) 0 - 1;
4613 dot_name[0] = '.';
4614 memcpy (dot_name + 1, name, len + 1);
4615 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
4616 bfd_release (abfd, dot_name);
4617 return h;
4618 }
4619
4620 /* This function satisfies all old ABI object references to ".bar" if a
4621 new ABI object defines "bar". Well, at least, undefined dot symbols
4622 are made weak. This stops later archive searches from including an
4623 object if we already have a function descriptor definition. It also
4624 prevents the linker complaining about undefined symbols.
4625 We also check and correct mismatched symbol visibility here. The
4626 most restrictive visibility of the function descriptor and the
4627 function entry symbol is used. */
4628
4629 static bfd_boolean
4630 add_symbol_adjust (struct ppc_link_hash_entry *eh, struct bfd_link_info *info)
4631 {
4632 struct ppc_link_hash_table *htab;
4633 struct ppc_link_hash_entry *fdh;
4634
4635 if (eh->elf.root.type == bfd_link_hash_indirect)
4636 return TRUE;
4637
4638 if (eh->elf.root.type == bfd_link_hash_warning)
4639 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
4640
4641 if (eh->elf.root.root.string[0] != '.')
4642 abort ();
4643
4644 htab = ppc_hash_table (info);
4645 if (htab == NULL)
4646 return FALSE;
4647
4648 fdh = lookup_fdh (eh, htab);
4649 if (fdh == NULL)
4650 {
4651 if (!info->relocatable
4652 && (eh->elf.root.type == bfd_link_hash_undefined
4653 || eh->elf.root.type == bfd_link_hash_undefweak)
4654 && eh->elf.ref_regular)
4655 {
4656 /* Make an undefweak function descriptor sym, which is enough to
4657 pull in an --as-needed shared lib, but won't cause link
4658 errors. Archives are handled elsewhere. */
4659 fdh = make_fdh (info, eh);
4660 if (fdh == NULL)
4661 return FALSE;
4662 fdh->elf.ref_regular = 1;
4663 }
4664 }
4665 else
4666 {
4667 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
4668 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
4669 if (entry_vis < descr_vis)
4670 fdh->elf.other += entry_vis - descr_vis;
4671 else if (entry_vis > descr_vis)
4672 eh->elf.other += descr_vis - entry_vis;
4673
4674 if ((fdh->elf.root.type == bfd_link_hash_defined
4675 || fdh->elf.root.type == bfd_link_hash_defweak)
4676 && eh->elf.root.type == bfd_link_hash_undefined)
4677 {
4678 eh->elf.root.type = bfd_link_hash_undefweak;
4679 eh->was_undefined = 1;
4680 htab->twiddled_syms = 1;
4681 }
4682 }
4683
4684 return TRUE;
4685 }
4686
4687 /* Process list of dot-symbols we made in link_hash_newfunc. */
4688
4689 static bfd_boolean
4690 ppc64_elf_process_dot_syms (bfd *ibfd, struct bfd_link_info *info)
4691 {
4692 struct ppc_link_hash_table *htab;
4693 struct ppc_link_hash_entry **p, *eh;
4694
4695 if (!is_ppc64_elf (info->output_bfd))
4696 return TRUE;
4697 htab = ppc_hash_table (info);
4698 if (htab == NULL)
4699 return FALSE;
4700
4701 if (is_ppc64_elf (ibfd))
4702 {
4703 p = &htab->dot_syms;
4704 while ((eh = *p) != NULL)
4705 {
4706 *p = NULL;
4707 if (!add_symbol_adjust (eh, info))
4708 return FALSE;
4709 p = &eh->u.next_dot_sym;
4710 }
4711 }
4712
4713 /* Clear the list for non-ppc64 input files. */
4714 p = &htab->dot_syms;
4715 while ((eh = *p) != NULL)
4716 {
4717 *p = NULL;
4718 p = &eh->u.next_dot_sym;
4719 }
4720
4721 /* We need to fix the undefs list for any syms we have twiddled to
4722 undef_weak. */
4723 if (htab->twiddled_syms)
4724 {
4725 bfd_link_repair_undef_list (&htab->elf.root);
4726 htab->twiddled_syms = 0;
4727 }
4728 return TRUE;
4729 }
4730
4731 /* Undo hash table changes when an --as-needed input file is determined
4732 not to be needed. */
4733
4734 static bfd_boolean
4735 ppc64_elf_as_needed_cleanup (bfd *ibfd ATTRIBUTE_UNUSED,
4736 struct bfd_link_info *info)
4737 {
4738 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4739
4740 if (htab == NULL)
4741 return FALSE;
4742
4743 htab->dot_syms = NULL;
4744 return TRUE;
4745 }
4746
4747 static struct plt_entry **
4748 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
4749 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
4750 {
4751 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
4752 struct plt_entry **local_plt;
4753 unsigned char *local_got_tls_masks;
4754
4755 if (local_got_ents == NULL)
4756 {
4757 bfd_size_type size = symtab_hdr->sh_info;
4758
4759 size *= (sizeof (*local_got_ents)
4760 + sizeof (*local_plt)
4761 + sizeof (*local_got_tls_masks));
4762 local_got_ents = bfd_zalloc (abfd, size);
4763 if (local_got_ents == NULL)
4764 return NULL;
4765 elf_local_got_ents (abfd) = local_got_ents;
4766 }
4767
4768 if ((tls_type & (PLT_IFUNC | TLS_EXPLICIT)) == 0)
4769 {
4770 struct got_entry *ent;
4771
4772 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
4773 if (ent->addend == r_addend
4774 && ent->owner == abfd
4775 && ent->tls_type == tls_type)
4776 break;
4777 if (ent == NULL)
4778 {
4779 bfd_size_type amt = sizeof (*ent);
4780 ent = bfd_alloc (abfd, amt);
4781 if (ent == NULL)
4782 return FALSE;
4783 ent->next = local_got_ents[r_symndx];
4784 ent->addend = r_addend;
4785 ent->owner = abfd;
4786 ent->tls_type = tls_type;
4787 ent->is_indirect = FALSE;
4788 ent->got.refcount = 0;
4789 local_got_ents[r_symndx] = ent;
4790 }
4791 ent->got.refcount += 1;
4792 }
4793
4794 local_plt = (struct plt_entry **) (local_got_ents + symtab_hdr->sh_info);
4795 local_got_tls_masks = (unsigned char *) (local_plt + symtab_hdr->sh_info);
4796 local_got_tls_masks[r_symndx] |= tls_type;
4797
4798 return local_plt + r_symndx;
4799 }
4800
4801 static bfd_boolean
4802 update_plt_info (bfd *abfd, struct plt_entry **plist, bfd_vma addend)
4803 {
4804 struct plt_entry *ent;
4805
4806 for (ent = *plist; ent != NULL; ent = ent->next)
4807 if (ent->addend == addend)
4808 break;
4809 if (ent == NULL)
4810 {
4811 bfd_size_type amt = sizeof (*ent);
4812 ent = bfd_alloc (abfd, amt);
4813 if (ent == NULL)
4814 return FALSE;
4815 ent->next = *plist;
4816 ent->addend = addend;
4817 ent->plt.refcount = 0;
4818 *plist = ent;
4819 }
4820 ent->plt.refcount += 1;
4821 return TRUE;
4822 }
4823
4824 static bfd_boolean
4825 is_branch_reloc (enum elf_ppc64_reloc_type r_type)
4826 {
4827 return (r_type == R_PPC64_REL24
4828 || r_type == R_PPC64_REL14
4829 || r_type == R_PPC64_REL14_BRTAKEN
4830 || r_type == R_PPC64_REL14_BRNTAKEN
4831 || r_type == R_PPC64_ADDR24
4832 || r_type == R_PPC64_ADDR14
4833 || r_type == R_PPC64_ADDR14_BRTAKEN
4834 || r_type == R_PPC64_ADDR14_BRNTAKEN);
4835 }
4836
4837 /* Look through the relocs for a section during the first phase, and
4838 calculate needed space in the global offset table, procedure
4839 linkage table, and dynamic reloc sections. */
4840
4841 static bfd_boolean
4842 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
4843 asection *sec, const Elf_Internal_Rela *relocs)
4844 {
4845 struct ppc_link_hash_table *htab;
4846 Elf_Internal_Shdr *symtab_hdr;
4847 struct elf_link_hash_entry **sym_hashes;
4848 const Elf_Internal_Rela *rel;
4849 const Elf_Internal_Rela *rel_end;
4850 asection *sreloc;
4851 asection **opd_sym_map;
4852 struct elf_link_hash_entry *tga, *dottga;
4853
4854 if (info->relocatable)
4855 return TRUE;
4856
4857 /* Don't do anything special with non-loaded, non-alloced sections.
4858 In particular, any relocs in such sections should not affect GOT
4859 and PLT reference counting (ie. we don't allow them to create GOT
4860 or PLT entries), there's no possibility or desire to optimize TLS
4861 relocs, and there's not much point in propagating relocs to shared
4862 libs that the dynamic linker won't relocate. */
4863 if ((sec->flags & SEC_ALLOC) == 0)
4864 return TRUE;
4865
4866 BFD_ASSERT (is_ppc64_elf (abfd));
4867
4868 htab = ppc_hash_table (info);
4869 if (htab == NULL)
4870 return FALSE;
4871
4872 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
4873 FALSE, FALSE, TRUE);
4874 dottga = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
4875 FALSE, FALSE, TRUE);
4876 symtab_hdr = &elf_symtab_hdr (abfd);
4877 sym_hashes = elf_sym_hashes (abfd);
4878 sreloc = NULL;
4879 opd_sym_map = NULL;
4880 if (strcmp (sec->name, ".opd") == 0)
4881 {
4882 /* Garbage collection needs some extra help with .opd sections.
4883 We don't want to necessarily keep everything referenced by
4884 relocs in .opd, as that would keep all functions. Instead,
4885 if we reference an .opd symbol (a function descriptor), we
4886 want to keep the function code symbol's section. This is
4887 easy for global symbols, but for local syms we need to keep
4888 information about the associated function section. */
4889 bfd_size_type amt;
4890
4891 amt = sec->size * sizeof (*opd_sym_map) / 8;
4892 opd_sym_map = bfd_zalloc (abfd, amt);
4893 if (opd_sym_map == NULL)
4894 return FALSE;
4895 ppc64_elf_section_data (sec)->u.opd.func_sec = opd_sym_map;
4896 BFD_ASSERT (ppc64_elf_section_data (sec)->sec_type == sec_normal);
4897 ppc64_elf_section_data (sec)->sec_type = sec_opd;
4898 }
4899
4900 if (htab->sfpr == NULL
4901 && !create_linkage_sections (htab->elf.dynobj, info))
4902 return FALSE;
4903
4904 rel_end = relocs + sec->reloc_count;
4905 for (rel = relocs; rel < rel_end; rel++)
4906 {
4907 unsigned long r_symndx;
4908 struct elf_link_hash_entry *h;
4909 enum elf_ppc64_reloc_type r_type;
4910 int tls_type;
4911 struct _ppc64_elf_section_data *ppc64_sec;
4912 struct plt_entry **ifunc;
4913
4914 r_symndx = ELF64_R_SYM (rel->r_info);
4915 if (r_symndx < symtab_hdr->sh_info)
4916 h = NULL;
4917 else
4918 {
4919 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4920 h = elf_follow_link (h);
4921 }
4922
4923 tls_type = 0;
4924 ifunc = NULL;
4925 if (h != NULL)
4926 {
4927 if (h->type == STT_GNU_IFUNC)
4928 {
4929 h->needs_plt = 1;
4930 ifunc = &h->plt.plist;
4931 }
4932 }
4933 else
4934 {
4935 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4936 abfd, r_symndx);
4937 if (isym == NULL)
4938 return FALSE;
4939
4940 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
4941 {
4942 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
4943 rel->r_addend, PLT_IFUNC);
4944 if (ifunc == NULL)
4945 return FALSE;
4946 }
4947 }
4948 r_type = ELF64_R_TYPE (rel->r_info);
4949 if (is_branch_reloc (r_type))
4950 {
4951 if (h != NULL && (h == tga || h == dottga))
4952 {
4953 if (rel != relocs
4954 && (ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSGD
4955 || ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSLD))
4956 /* We have a new-style __tls_get_addr call with a marker
4957 reloc. */
4958 ;
4959 else
4960 /* Mark this section as having an old-style call. */
4961 sec->has_tls_get_addr_call = 1;
4962 }
4963
4964 /* STT_GNU_IFUNC symbols must have a PLT entry. */
4965 if (ifunc != NULL
4966 && !update_plt_info (abfd, ifunc, rel->r_addend))
4967 return FALSE;
4968 }
4969
4970 switch (r_type)
4971 {
4972 case R_PPC64_TLSGD:
4973 case R_PPC64_TLSLD:
4974 /* These special tls relocs tie a call to __tls_get_addr with
4975 its parameter symbol. */
4976 break;
4977
4978 case R_PPC64_GOT_TLSLD16:
4979 case R_PPC64_GOT_TLSLD16_LO:
4980 case R_PPC64_GOT_TLSLD16_HI:
4981 case R_PPC64_GOT_TLSLD16_HA:
4982 tls_type = TLS_TLS | TLS_LD;
4983 goto dogottls;
4984
4985 case R_PPC64_GOT_TLSGD16:
4986 case R_PPC64_GOT_TLSGD16_LO:
4987 case R_PPC64_GOT_TLSGD16_HI:
4988 case R_PPC64_GOT_TLSGD16_HA:
4989 tls_type = TLS_TLS | TLS_GD;
4990 goto dogottls;
4991
4992 case R_PPC64_GOT_TPREL16_DS:
4993 case R_PPC64_GOT_TPREL16_LO_DS:
4994 case R_PPC64_GOT_TPREL16_HI:
4995 case R_PPC64_GOT_TPREL16_HA:
4996 if (!info->executable)
4997 info->flags |= DF_STATIC_TLS;
4998 tls_type = TLS_TLS | TLS_TPREL;
4999 goto dogottls;
5000
5001 case R_PPC64_GOT_DTPREL16_DS:
5002 case R_PPC64_GOT_DTPREL16_LO_DS:
5003 case R_PPC64_GOT_DTPREL16_HI:
5004 case R_PPC64_GOT_DTPREL16_HA:
5005 tls_type = TLS_TLS | TLS_DTPREL;
5006 dogottls:
5007 sec->has_tls_reloc = 1;
5008 /* Fall thru */
5009
5010 case R_PPC64_GOT16:
5011 case R_PPC64_GOT16_DS:
5012 case R_PPC64_GOT16_HA:
5013 case R_PPC64_GOT16_HI:
5014 case R_PPC64_GOT16_LO:
5015 case R_PPC64_GOT16_LO_DS:
5016 /* This symbol requires a global offset table entry. */
5017 sec->has_toc_reloc = 1;
5018 if (r_type == R_PPC64_GOT_TLSLD16
5019 || r_type == R_PPC64_GOT_TLSGD16
5020 || r_type == R_PPC64_GOT_TPREL16_DS
5021 || r_type == R_PPC64_GOT_DTPREL16_DS
5022 || r_type == R_PPC64_GOT16
5023 || r_type == R_PPC64_GOT16_DS)
5024 {
5025 htab->do_multi_toc = 1;
5026 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5027 }
5028
5029 if (ppc64_elf_tdata (abfd)->got == NULL
5030 && !create_got_section (abfd, info))
5031 return FALSE;
5032
5033 if (h != NULL)
5034 {
5035 struct ppc_link_hash_entry *eh;
5036 struct got_entry *ent;
5037
5038 eh = (struct ppc_link_hash_entry *) h;
5039 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
5040 if (ent->addend == rel->r_addend
5041 && ent->owner == abfd
5042 && ent->tls_type == tls_type)
5043 break;
5044 if (ent == NULL)
5045 {
5046 bfd_size_type amt = sizeof (*ent);
5047 ent = bfd_alloc (abfd, amt);
5048 if (ent == NULL)
5049 return FALSE;
5050 ent->next = eh->elf.got.glist;
5051 ent->addend = rel->r_addend;
5052 ent->owner = abfd;
5053 ent->tls_type = tls_type;
5054 ent->is_indirect = FALSE;
5055 ent->got.refcount = 0;
5056 eh->elf.got.glist = ent;
5057 }
5058 ent->got.refcount += 1;
5059 eh->tls_mask |= tls_type;
5060 }
5061 else
5062 /* This is a global offset table entry for a local symbol. */
5063 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5064 rel->r_addend, tls_type))
5065 return FALSE;
5066 break;
5067
5068 case R_PPC64_PLT16_HA:
5069 case R_PPC64_PLT16_HI:
5070 case R_PPC64_PLT16_LO:
5071 case R_PPC64_PLT32:
5072 case R_PPC64_PLT64:
5073 /* This symbol requires a procedure linkage table entry. We
5074 actually build the entry in adjust_dynamic_symbol,
5075 because this might be a case of linking PIC code without
5076 linking in any dynamic objects, in which case we don't
5077 need to generate a procedure linkage table after all. */
5078 if (h == NULL)
5079 {
5080 /* It does not make sense to have a procedure linkage
5081 table entry for a local symbol. */
5082 bfd_set_error (bfd_error_bad_value);
5083 return FALSE;
5084 }
5085 else
5086 {
5087 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5088 return FALSE;
5089 h->needs_plt = 1;
5090 if (h->root.root.string[0] == '.'
5091 && h->root.root.string[1] != '\0')
5092 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5093 }
5094 break;
5095
5096 /* The following relocations don't need to propagate the
5097 relocation if linking a shared object since they are
5098 section relative. */
5099 case R_PPC64_SECTOFF:
5100 case R_PPC64_SECTOFF_LO:
5101 case R_PPC64_SECTOFF_HI:
5102 case R_PPC64_SECTOFF_HA:
5103 case R_PPC64_SECTOFF_DS:
5104 case R_PPC64_SECTOFF_LO_DS:
5105 case R_PPC64_DTPREL16:
5106 case R_PPC64_DTPREL16_LO:
5107 case R_PPC64_DTPREL16_HI:
5108 case R_PPC64_DTPREL16_HA:
5109 case R_PPC64_DTPREL16_DS:
5110 case R_PPC64_DTPREL16_LO_DS:
5111 case R_PPC64_DTPREL16_HIGHER:
5112 case R_PPC64_DTPREL16_HIGHERA:
5113 case R_PPC64_DTPREL16_HIGHEST:
5114 case R_PPC64_DTPREL16_HIGHESTA:
5115 break;
5116
5117 /* Nor do these. */
5118 case R_PPC64_REL16:
5119 case R_PPC64_REL16_LO:
5120 case R_PPC64_REL16_HI:
5121 case R_PPC64_REL16_HA:
5122 break;
5123
5124 case R_PPC64_TOC16:
5125 case R_PPC64_TOC16_DS:
5126 htab->do_multi_toc = 1;
5127 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5128 case R_PPC64_TOC16_LO:
5129 case R_PPC64_TOC16_HI:
5130 case R_PPC64_TOC16_HA:
5131 case R_PPC64_TOC16_LO_DS:
5132 sec->has_toc_reloc = 1;
5133 break;
5134
5135 /* This relocation describes the C++ object vtable hierarchy.
5136 Reconstruct it for later use during GC. */
5137 case R_PPC64_GNU_VTINHERIT:
5138 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
5139 return FALSE;
5140 break;
5141
5142 /* This relocation describes which C++ vtable entries are actually
5143 used. Record for later use during GC. */
5144 case R_PPC64_GNU_VTENTRY:
5145 BFD_ASSERT (h != NULL);
5146 if (h != NULL
5147 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
5148 return FALSE;
5149 break;
5150
5151 case R_PPC64_REL14:
5152 case R_PPC64_REL14_BRTAKEN:
5153 case R_PPC64_REL14_BRNTAKEN:
5154 {
5155 asection *dest = NULL;
5156
5157 /* Heuristic: If jumping outside our section, chances are
5158 we are going to need a stub. */
5159 if (h != NULL)
5160 {
5161 /* If the sym is weak it may be overridden later, so
5162 don't assume we know where a weak sym lives. */
5163 if (h->root.type == bfd_link_hash_defined)
5164 dest = h->root.u.def.section;
5165 }
5166 else
5167 {
5168 Elf_Internal_Sym *isym;
5169
5170 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5171 abfd, r_symndx);
5172 if (isym == NULL)
5173 return FALSE;
5174
5175 dest = bfd_section_from_elf_index (abfd, isym->st_shndx);
5176 }
5177
5178 if (dest != sec)
5179 ppc64_elf_section_data (sec)->has_14bit_branch = 1;
5180 }
5181 /* Fall through. */
5182
5183 case R_PPC64_REL24:
5184 if (h != NULL && ifunc == NULL)
5185 {
5186 /* We may need a .plt entry if the function this reloc
5187 refers to is in a shared lib. */
5188 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5189 return FALSE;
5190 h->needs_plt = 1;
5191 if (h->root.root.string[0] == '.'
5192 && h->root.root.string[1] != '\0')
5193 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5194 if (h == tga || h == dottga)
5195 sec->has_tls_reloc = 1;
5196 }
5197 break;
5198
5199 case R_PPC64_TPREL64:
5200 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
5201 if (!info->executable)
5202 info->flags |= DF_STATIC_TLS;
5203 goto dotlstoc;
5204
5205 case R_PPC64_DTPMOD64:
5206 if (rel + 1 < rel_end
5207 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
5208 && rel[1].r_offset == rel->r_offset + 8)
5209 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
5210 else
5211 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
5212 goto dotlstoc;
5213
5214 case R_PPC64_DTPREL64:
5215 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
5216 if (rel != relocs
5217 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
5218 && rel[-1].r_offset == rel->r_offset - 8)
5219 /* This is the second reloc of a dtpmod, dtprel pair.
5220 Don't mark with TLS_DTPREL. */
5221 goto dodyn;
5222
5223 dotlstoc:
5224 sec->has_tls_reloc = 1;
5225 if (h != NULL)
5226 {
5227 struct ppc_link_hash_entry *eh;
5228 eh = (struct ppc_link_hash_entry *) h;
5229 eh->tls_mask |= tls_type;
5230 }
5231 else
5232 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5233 rel->r_addend, tls_type))
5234 return FALSE;
5235
5236 ppc64_sec = ppc64_elf_section_data (sec);
5237 if (ppc64_sec->sec_type != sec_toc)
5238 {
5239 bfd_size_type amt;
5240
5241 /* One extra to simplify get_tls_mask. */
5242 amt = sec->size * sizeof (unsigned) / 8 + sizeof (unsigned);
5243 ppc64_sec->u.toc.symndx = bfd_zalloc (abfd, amt);
5244 if (ppc64_sec->u.toc.symndx == NULL)
5245 return FALSE;
5246 amt = sec->size * sizeof (bfd_vma) / 8;
5247 ppc64_sec->u.toc.add = bfd_zalloc (abfd, amt);
5248 if (ppc64_sec->u.toc.add == NULL)
5249 return FALSE;
5250 BFD_ASSERT (ppc64_sec->sec_type == sec_normal);
5251 ppc64_sec->sec_type = sec_toc;
5252 }
5253 BFD_ASSERT (rel->r_offset % 8 == 0);
5254 ppc64_sec->u.toc.symndx[rel->r_offset / 8] = r_symndx;
5255 ppc64_sec->u.toc.add[rel->r_offset / 8] = rel->r_addend;
5256
5257 /* Mark the second slot of a GD or LD entry.
5258 -1 to indicate GD and -2 to indicate LD. */
5259 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
5260 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -1;
5261 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
5262 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -2;
5263 goto dodyn;
5264
5265 case R_PPC64_TPREL16:
5266 case R_PPC64_TPREL16_LO:
5267 case R_PPC64_TPREL16_HI:
5268 case R_PPC64_TPREL16_HA:
5269 case R_PPC64_TPREL16_DS:
5270 case R_PPC64_TPREL16_LO_DS:
5271 case R_PPC64_TPREL16_HIGHER:
5272 case R_PPC64_TPREL16_HIGHERA:
5273 case R_PPC64_TPREL16_HIGHEST:
5274 case R_PPC64_TPREL16_HIGHESTA:
5275 if (info->shared)
5276 {
5277 if (!info->executable)
5278 info->flags |= DF_STATIC_TLS;
5279 goto dodyn;
5280 }
5281 break;
5282
5283 case R_PPC64_ADDR64:
5284 if (opd_sym_map != NULL
5285 && rel + 1 < rel_end
5286 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
5287 {
5288 if (h != NULL)
5289 {
5290 if (h->root.root.string[0] == '.'
5291 && h->root.root.string[1] != 0
5292 && lookup_fdh ((struct ppc_link_hash_entry *) h, htab))
5293 ;
5294 else
5295 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5296 }
5297 else
5298 {
5299 asection *s;
5300 Elf_Internal_Sym *isym;
5301
5302 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5303 abfd, r_symndx);
5304 if (isym == NULL)
5305 return FALSE;
5306
5307 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5308 if (s != NULL && s != sec)
5309 opd_sym_map[rel->r_offset / 8] = s;
5310 }
5311 }
5312 /* Fall through. */
5313
5314 case R_PPC64_REL30:
5315 case R_PPC64_REL32:
5316 case R_PPC64_REL64:
5317 case R_PPC64_ADDR14:
5318 case R_PPC64_ADDR14_BRNTAKEN:
5319 case R_PPC64_ADDR14_BRTAKEN:
5320 case R_PPC64_ADDR16:
5321 case R_PPC64_ADDR16_DS:
5322 case R_PPC64_ADDR16_HA:
5323 case R_PPC64_ADDR16_HI:
5324 case R_PPC64_ADDR16_HIGHER:
5325 case R_PPC64_ADDR16_HIGHERA:
5326 case R_PPC64_ADDR16_HIGHEST:
5327 case R_PPC64_ADDR16_HIGHESTA:
5328 case R_PPC64_ADDR16_LO:
5329 case R_PPC64_ADDR16_LO_DS:
5330 case R_PPC64_ADDR24:
5331 case R_PPC64_ADDR32:
5332 case R_PPC64_UADDR16:
5333 case R_PPC64_UADDR32:
5334 case R_PPC64_UADDR64:
5335 case R_PPC64_TOC:
5336 if (h != NULL && !info->shared)
5337 /* We may need a copy reloc. */
5338 h->non_got_ref = 1;
5339
5340 /* Don't propagate .opd relocs. */
5341 if (NO_OPD_RELOCS && opd_sym_map != NULL)
5342 break;
5343
5344 /* If we are creating a shared library, and this is a reloc
5345 against a global symbol, or a non PC relative reloc
5346 against a local symbol, then we need to copy the reloc
5347 into the shared library. However, if we are linking with
5348 -Bsymbolic, we do not need to copy a reloc against a
5349 global symbol which is defined in an object we are
5350 including in the link (i.e., DEF_REGULAR is set). At
5351 this point we have not seen all the input files, so it is
5352 possible that DEF_REGULAR is not set now but will be set
5353 later (it is never cleared). In case of a weak definition,
5354 DEF_REGULAR may be cleared later by a strong definition in
5355 a shared library. We account for that possibility below by
5356 storing information in the dyn_relocs field of the hash
5357 table entry. A similar situation occurs when creating
5358 shared libraries and symbol visibility changes render the
5359 symbol local.
5360
5361 If on the other hand, we are creating an executable, we
5362 may need to keep relocations for symbols satisfied by a
5363 dynamic library if we manage to avoid copy relocs for the
5364 symbol. */
5365 dodyn:
5366 if ((info->shared
5367 && (must_be_dyn_reloc (info, r_type)
5368 || (h != NULL
5369 && (! info->symbolic
5370 || h->root.type == bfd_link_hash_defweak
5371 || !h->def_regular))))
5372 || (ELIMINATE_COPY_RELOCS
5373 && !info->shared
5374 && h != NULL
5375 && (h->root.type == bfd_link_hash_defweak
5376 || !h->def_regular))
5377 || (!info->shared
5378 && ifunc != NULL))
5379 {
5380 struct ppc_dyn_relocs *p;
5381 struct ppc_dyn_relocs **head;
5382
5383 /* We must copy these reloc types into the output file.
5384 Create a reloc section in dynobj and make room for
5385 this reloc. */
5386 if (sreloc == NULL)
5387 {
5388 sreloc = _bfd_elf_make_dynamic_reloc_section
5389 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
5390
5391 if (sreloc == NULL)
5392 return FALSE;
5393 }
5394
5395 /* If this is a global symbol, we count the number of
5396 relocations we need for this symbol. */
5397 if (h != NULL)
5398 {
5399 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
5400 }
5401 else
5402 {
5403 /* Track dynamic relocs needed for local syms too.
5404 We really need local syms available to do this
5405 easily. Oh well. */
5406 asection *s;
5407 void *vpp;
5408 Elf_Internal_Sym *isym;
5409
5410 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5411 abfd, r_symndx);
5412 if (isym == NULL)
5413 return FALSE;
5414
5415 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5416 if (s == NULL)
5417 s = sec;
5418
5419 vpp = &elf_section_data (s)->local_dynrel;
5420 head = (struct ppc_dyn_relocs **) vpp;
5421 }
5422
5423 p = *head;
5424 if (p == NULL || p->sec != sec)
5425 {
5426 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5427 if (p == NULL)
5428 return FALSE;
5429 p->next = *head;
5430 *head = p;
5431 p->sec = sec;
5432 p->count = 0;
5433 p->pc_count = 0;
5434 }
5435
5436 p->count += 1;
5437 if (!must_be_dyn_reloc (info, r_type))
5438 p->pc_count += 1;
5439 }
5440 break;
5441
5442 default:
5443 break;
5444 }
5445 }
5446
5447 return TRUE;
5448 }
5449
5450 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
5451 of the code entry point, and its section. */
5452
5453 static bfd_vma
5454 opd_entry_value (asection *opd_sec,
5455 bfd_vma offset,
5456 asection **code_sec,
5457 bfd_vma *code_off)
5458 {
5459 bfd *opd_bfd = opd_sec->owner;
5460 Elf_Internal_Rela *relocs;
5461 Elf_Internal_Rela *lo, *hi, *look;
5462 bfd_vma val;
5463
5464 /* No relocs implies we are linking a --just-symbols object. */
5465 if (opd_sec->reloc_count == 0)
5466 {
5467 if (!bfd_get_section_contents (opd_bfd, opd_sec, &val, offset, 8))
5468 return (bfd_vma) -1;
5469
5470 if (code_sec != NULL)
5471 {
5472 asection *sec, *likely = NULL;
5473 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
5474 if (sec->vma <= val
5475 && (sec->flags & SEC_LOAD) != 0
5476 && (sec->flags & SEC_ALLOC) != 0)
5477 likely = sec;
5478 if (likely != NULL)
5479 {
5480 *code_sec = likely;
5481 if (code_off != NULL)
5482 *code_off = val - likely->vma;
5483 }
5484 }
5485 return val;
5486 }
5487
5488 BFD_ASSERT (is_ppc64_elf (opd_bfd));
5489
5490 relocs = ppc64_elf_tdata (opd_bfd)->opd_relocs;
5491 if (relocs == NULL)
5492 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
5493
5494 /* Go find the opd reloc at the sym address. */
5495 lo = relocs;
5496 BFD_ASSERT (lo != NULL);
5497 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
5498 val = (bfd_vma) -1;
5499 while (lo < hi)
5500 {
5501 look = lo + (hi - lo) / 2;
5502 if (look->r_offset < offset)
5503 lo = look + 1;
5504 else if (look->r_offset > offset)
5505 hi = look;
5506 else
5507 {
5508 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (opd_bfd);
5509
5510 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
5511 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
5512 {
5513 unsigned long symndx = ELF64_R_SYM (look->r_info);
5514 asection *sec;
5515
5516 if (symndx < symtab_hdr->sh_info)
5517 {
5518 Elf_Internal_Sym *sym;
5519
5520 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
5521 if (sym == NULL)
5522 {
5523 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
5524 symtab_hdr->sh_info,
5525 0, NULL, NULL, NULL);
5526 if (sym == NULL)
5527 break;
5528 symtab_hdr->contents = (bfd_byte *) sym;
5529 }
5530
5531 sym += symndx;
5532 val = sym->st_value;
5533 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
5534 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
5535 }
5536 else
5537 {
5538 struct elf_link_hash_entry **sym_hashes;
5539 struct elf_link_hash_entry *rh;
5540
5541 sym_hashes = elf_sym_hashes (opd_bfd);
5542 rh = sym_hashes[symndx - symtab_hdr->sh_info];
5543 rh = elf_follow_link (rh);
5544 BFD_ASSERT (rh->root.type == bfd_link_hash_defined
5545 || rh->root.type == bfd_link_hash_defweak);
5546 val = rh->root.u.def.value;
5547 sec = rh->root.u.def.section;
5548 }
5549 val += look->r_addend;
5550 if (code_off != NULL)
5551 *code_off = val;
5552 if (code_sec != NULL)
5553 *code_sec = sec;
5554 if (sec != NULL && sec->output_section != NULL)
5555 val += sec->output_section->vma + sec->output_offset;
5556 }
5557 break;
5558 }
5559 }
5560
5561 return val;
5562 }
5563
5564 /* Return true if symbol is defined in a regular object file. */
5565
5566 static bfd_boolean
5567 is_static_defined (struct elf_link_hash_entry *h)
5568 {
5569 return ((h->root.type == bfd_link_hash_defined
5570 || h->root.type == bfd_link_hash_defweak)
5571 && h->root.u.def.section != NULL
5572 && h->root.u.def.section->output_section != NULL);
5573 }
5574
5575 /* If FDH is a function descriptor symbol, return the associated code
5576 entry symbol if it is defined. Return NULL otherwise. */
5577
5578 static struct ppc_link_hash_entry *
5579 defined_code_entry (struct ppc_link_hash_entry *fdh)
5580 {
5581 if (fdh->is_func_descriptor)
5582 {
5583 struct ppc_link_hash_entry *fh = ppc_follow_link (fdh->oh);
5584 if (fh->elf.root.type == bfd_link_hash_defined
5585 || fh->elf.root.type == bfd_link_hash_defweak)
5586 return fh;
5587 }
5588 return NULL;
5589 }
5590
5591 /* If FH is a function code entry symbol, return the associated
5592 function descriptor symbol if it is defined. Return NULL otherwise. */
5593
5594 static struct ppc_link_hash_entry *
5595 defined_func_desc (struct ppc_link_hash_entry *fh)
5596 {
5597 if (fh->oh != NULL
5598 && fh->oh->is_func_descriptor)
5599 {
5600 struct ppc_link_hash_entry *fdh = ppc_follow_link (fh->oh);
5601 if (fdh->elf.root.type == bfd_link_hash_defined
5602 || fdh->elf.root.type == bfd_link_hash_defweak)
5603 return fdh;
5604 }
5605 return NULL;
5606 }
5607
5608 /* Mark all our entry sym sections, both opd and code section. */
5609
5610 static void
5611 ppc64_elf_gc_keep (struct bfd_link_info *info)
5612 {
5613 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5614 struct bfd_sym_chain *sym;
5615
5616 if (htab == NULL)
5617 return;
5618
5619 for (sym = info->gc_sym_list; sym != NULL; sym = sym->next)
5620 {
5621 struct ppc_link_hash_entry *eh, *fh;
5622 asection *sec;
5623
5624 eh = (struct ppc_link_hash_entry *)
5625 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, TRUE);
5626 if (eh == NULL)
5627 continue;
5628 if (eh->elf.root.type != bfd_link_hash_defined
5629 && eh->elf.root.type != bfd_link_hash_defweak)
5630 continue;
5631
5632 fh = defined_code_entry (eh);
5633 if (fh != NULL)
5634 {
5635 sec = fh->elf.root.u.def.section;
5636 sec->flags |= SEC_KEEP;
5637 }
5638 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5639 && opd_entry_value (eh->elf.root.u.def.section,
5640 eh->elf.root.u.def.value,
5641 &sec, NULL) != (bfd_vma) -1)
5642 sec->flags |= SEC_KEEP;
5643
5644 sec = eh->elf.root.u.def.section;
5645 sec->flags |= SEC_KEEP;
5646 }
5647 }
5648
5649 /* Mark sections containing dynamically referenced symbols. When
5650 building shared libraries, we must assume that any visible symbol is
5651 referenced. */
5652
5653 static bfd_boolean
5654 ppc64_elf_gc_mark_dynamic_ref (struct elf_link_hash_entry *h, void *inf)
5655 {
5656 struct bfd_link_info *info = (struct bfd_link_info *) inf;
5657 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
5658 struct ppc_link_hash_entry *fdh;
5659
5660 if (eh->elf.root.type == bfd_link_hash_warning)
5661 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
5662
5663 /* Dynamic linking info is on the func descriptor sym. */
5664 fdh = defined_func_desc (eh);
5665 if (fdh != NULL)
5666 eh = fdh;
5667
5668 if ((eh->elf.root.type == bfd_link_hash_defined
5669 || eh->elf.root.type == bfd_link_hash_defweak)
5670 && (eh->elf.ref_dynamic
5671 || (!info->executable
5672 && eh->elf.def_regular
5673 && ELF_ST_VISIBILITY (eh->elf.other) != STV_INTERNAL
5674 && ELF_ST_VISIBILITY (eh->elf.other) != STV_HIDDEN)))
5675 {
5676 asection *code_sec;
5677 struct ppc_link_hash_entry *fh;
5678
5679 eh->elf.root.u.def.section->flags |= SEC_KEEP;
5680
5681 /* Function descriptor syms cause the associated
5682 function code sym section to be marked. */
5683 fh = defined_code_entry (eh);
5684 if (fh != NULL)
5685 {
5686 code_sec = fh->elf.root.u.def.section;
5687 code_sec->flags |= SEC_KEEP;
5688 }
5689 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5690 && opd_entry_value (eh->elf.root.u.def.section,
5691 eh->elf.root.u.def.value,
5692 &code_sec, NULL) != (bfd_vma) -1)
5693 code_sec->flags |= SEC_KEEP;
5694 }
5695
5696 return TRUE;
5697 }
5698
5699 /* Return the section that should be marked against GC for a given
5700 relocation. */
5701
5702 static asection *
5703 ppc64_elf_gc_mark_hook (asection *sec,
5704 struct bfd_link_info *info,
5705 Elf_Internal_Rela *rel,
5706 struct elf_link_hash_entry *h,
5707 Elf_Internal_Sym *sym)
5708 {
5709 asection *rsec;
5710
5711 /* Syms return NULL if we're marking .opd, so we avoid marking all
5712 function sections, as all functions are referenced in .opd. */
5713 rsec = NULL;
5714 if (get_opd_info (sec) != NULL)
5715 return rsec;
5716
5717 if (h != NULL)
5718 {
5719 enum elf_ppc64_reloc_type r_type;
5720 struct ppc_link_hash_entry *eh, *fh, *fdh;
5721
5722 r_type = ELF64_R_TYPE (rel->r_info);
5723 switch (r_type)
5724 {
5725 case R_PPC64_GNU_VTINHERIT:
5726 case R_PPC64_GNU_VTENTRY:
5727 break;
5728
5729 default:
5730 switch (h->root.type)
5731 {
5732 case bfd_link_hash_defined:
5733 case bfd_link_hash_defweak:
5734 eh = (struct ppc_link_hash_entry *) h;
5735 fdh = defined_func_desc (eh);
5736 if (fdh != NULL)
5737 eh = fdh;
5738
5739 /* Function descriptor syms cause the associated
5740 function code sym section to be marked. */
5741 fh = defined_code_entry (eh);
5742 if (fh != NULL)
5743 {
5744 /* They also mark their opd section. */
5745 eh->elf.root.u.def.section->gc_mark = 1;
5746
5747 rsec = fh->elf.root.u.def.section;
5748 }
5749 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5750 && opd_entry_value (eh->elf.root.u.def.section,
5751 eh->elf.root.u.def.value,
5752 &rsec, NULL) != (bfd_vma) -1)
5753 eh->elf.root.u.def.section->gc_mark = 1;
5754 else
5755 rsec = h->root.u.def.section;
5756 break;
5757
5758 case bfd_link_hash_common:
5759 rsec = h->root.u.c.p->section;
5760 break;
5761
5762 default:
5763 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
5764 }
5765 }
5766 }
5767 else
5768 {
5769 struct _opd_sec_data *opd;
5770
5771 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
5772 opd = get_opd_info (rsec);
5773 if (opd != NULL && opd->func_sec != NULL)
5774 {
5775 rsec->gc_mark = 1;
5776
5777 rsec = opd->func_sec[(sym->st_value + rel->r_addend) / 8];
5778 }
5779 }
5780
5781 return rsec;
5782 }
5783
5784 /* Update the .got, .plt. and dynamic reloc reference counts for the
5785 section being removed. */
5786
5787 static bfd_boolean
5788 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
5789 asection *sec, const Elf_Internal_Rela *relocs)
5790 {
5791 struct ppc_link_hash_table *htab;
5792 Elf_Internal_Shdr *symtab_hdr;
5793 struct elf_link_hash_entry **sym_hashes;
5794 struct got_entry **local_got_ents;
5795 const Elf_Internal_Rela *rel, *relend;
5796
5797 if (info->relocatable)
5798 return TRUE;
5799
5800 if ((sec->flags & SEC_ALLOC) == 0)
5801 return TRUE;
5802
5803 elf_section_data (sec)->local_dynrel = NULL;
5804
5805 htab = ppc_hash_table (info);
5806 if (htab == NULL)
5807 return FALSE;
5808
5809 symtab_hdr = &elf_symtab_hdr (abfd);
5810 sym_hashes = elf_sym_hashes (abfd);
5811 local_got_ents = elf_local_got_ents (abfd);
5812
5813 relend = relocs + sec->reloc_count;
5814 for (rel = relocs; rel < relend; rel++)
5815 {
5816 unsigned long r_symndx;
5817 enum elf_ppc64_reloc_type r_type;
5818 struct elf_link_hash_entry *h = NULL;
5819 unsigned char tls_type = 0;
5820
5821 r_symndx = ELF64_R_SYM (rel->r_info);
5822 r_type = ELF64_R_TYPE (rel->r_info);
5823 if (r_symndx >= symtab_hdr->sh_info)
5824 {
5825 struct ppc_link_hash_entry *eh;
5826 struct ppc_dyn_relocs **pp;
5827 struct ppc_dyn_relocs *p;
5828
5829 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5830 h = elf_follow_link (h);
5831 eh = (struct ppc_link_hash_entry *) h;
5832
5833 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
5834 if (p->sec == sec)
5835 {
5836 /* Everything must go for SEC. */
5837 *pp = p->next;
5838 break;
5839 }
5840 }
5841
5842 if (is_branch_reloc (r_type))
5843 {
5844 struct plt_entry **ifunc = NULL;
5845 if (h != NULL)
5846 {
5847 if (h->type == STT_GNU_IFUNC)
5848 ifunc = &h->plt.plist;
5849 }
5850 else if (local_got_ents != NULL)
5851 {
5852 struct plt_entry **local_plt = (struct plt_entry **)
5853 (local_got_ents + symtab_hdr->sh_info);
5854 unsigned char *local_got_tls_masks = (unsigned char *)
5855 (local_plt + symtab_hdr->sh_info);
5856 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
5857 ifunc = local_plt + r_symndx;
5858 }
5859 if (ifunc != NULL)
5860 {
5861 struct plt_entry *ent;
5862
5863 for (ent = *ifunc; ent != NULL; ent = ent->next)
5864 if (ent->addend == rel->r_addend)
5865 break;
5866 if (ent == NULL)
5867 abort ();
5868 if (ent->plt.refcount > 0)
5869 ent->plt.refcount -= 1;
5870 continue;
5871 }
5872 }
5873
5874 switch (r_type)
5875 {
5876 case R_PPC64_GOT_TLSLD16:
5877 case R_PPC64_GOT_TLSLD16_LO:
5878 case R_PPC64_GOT_TLSLD16_HI:
5879 case R_PPC64_GOT_TLSLD16_HA:
5880 tls_type = TLS_TLS | TLS_LD;
5881 goto dogot;
5882
5883 case R_PPC64_GOT_TLSGD16:
5884 case R_PPC64_GOT_TLSGD16_LO:
5885 case R_PPC64_GOT_TLSGD16_HI:
5886 case R_PPC64_GOT_TLSGD16_HA:
5887 tls_type = TLS_TLS | TLS_GD;
5888 goto dogot;
5889
5890 case R_PPC64_GOT_TPREL16_DS:
5891 case R_PPC64_GOT_TPREL16_LO_DS:
5892 case R_PPC64_GOT_TPREL16_HI:
5893 case R_PPC64_GOT_TPREL16_HA:
5894 tls_type = TLS_TLS | TLS_TPREL;
5895 goto dogot;
5896
5897 case R_PPC64_GOT_DTPREL16_DS:
5898 case R_PPC64_GOT_DTPREL16_LO_DS:
5899 case R_PPC64_GOT_DTPREL16_HI:
5900 case R_PPC64_GOT_DTPREL16_HA:
5901 tls_type = TLS_TLS | TLS_DTPREL;
5902 goto dogot;
5903
5904 case R_PPC64_GOT16:
5905 case R_PPC64_GOT16_DS:
5906 case R_PPC64_GOT16_HA:
5907 case R_PPC64_GOT16_HI:
5908 case R_PPC64_GOT16_LO:
5909 case R_PPC64_GOT16_LO_DS:
5910 dogot:
5911 {
5912 struct got_entry *ent;
5913
5914 if (h != NULL)
5915 ent = h->got.glist;
5916 else
5917 ent = local_got_ents[r_symndx];
5918
5919 for (; ent != NULL; ent = ent->next)
5920 if (ent->addend == rel->r_addend
5921 && ent->owner == abfd
5922 && ent->tls_type == tls_type)
5923 break;
5924 if (ent == NULL)
5925 abort ();
5926 if (ent->got.refcount > 0)
5927 ent->got.refcount -= 1;
5928 }
5929 break;
5930
5931 case R_PPC64_PLT16_HA:
5932 case R_PPC64_PLT16_HI:
5933 case R_PPC64_PLT16_LO:
5934 case R_PPC64_PLT32:
5935 case R_PPC64_PLT64:
5936 case R_PPC64_REL14:
5937 case R_PPC64_REL14_BRNTAKEN:
5938 case R_PPC64_REL14_BRTAKEN:
5939 case R_PPC64_REL24:
5940 if (h != NULL)
5941 {
5942 struct plt_entry *ent;
5943
5944 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5945 if (ent->addend == rel->r_addend)
5946 break;
5947 if (ent != NULL && ent->plt.refcount > 0)
5948 ent->plt.refcount -= 1;
5949 }
5950 break;
5951
5952 default:
5953 break;
5954 }
5955 }
5956 return TRUE;
5957 }
5958
5959 /* The maximum size of .sfpr. */
5960 #define SFPR_MAX (218*4)
5961
5962 struct sfpr_def_parms
5963 {
5964 const char name[12];
5965 unsigned char lo, hi;
5966 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
5967 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
5968 };
5969
5970 /* Auto-generate _save*, _rest* functions in .sfpr. */
5971
5972 static bfd_boolean
5973 sfpr_define (struct bfd_link_info *info, const struct sfpr_def_parms *parm)
5974 {
5975 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5976 unsigned int i;
5977 size_t len = strlen (parm->name);
5978 bfd_boolean writing = FALSE;
5979 char sym[16];
5980
5981 if (htab == NULL)
5982 return FALSE;
5983
5984 memcpy (sym, parm->name, len);
5985 sym[len + 2] = 0;
5986
5987 for (i = parm->lo; i <= parm->hi; i++)
5988 {
5989 struct elf_link_hash_entry *h;
5990
5991 sym[len + 0] = i / 10 + '0';
5992 sym[len + 1] = i % 10 + '0';
5993 h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
5994 if (h != NULL
5995 && !h->def_regular)
5996 {
5997 h->root.type = bfd_link_hash_defined;
5998 h->root.u.def.section = htab->sfpr;
5999 h->root.u.def.value = htab->sfpr->size;
6000 h->type = STT_FUNC;
6001 h->def_regular = 1;
6002 _bfd_elf_link_hash_hide_symbol (info, h, TRUE);
6003 writing = TRUE;
6004 if (htab->sfpr->contents == NULL)
6005 {
6006 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
6007 if (htab->sfpr->contents == NULL)
6008 return FALSE;
6009 }
6010 }
6011 if (writing)
6012 {
6013 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
6014 if (i != parm->hi)
6015 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
6016 else
6017 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
6018 htab->sfpr->size = p - htab->sfpr->contents;
6019 }
6020 }
6021
6022 return TRUE;
6023 }
6024
6025 static bfd_byte *
6026 savegpr0 (bfd *abfd, bfd_byte *p, int r)
6027 {
6028 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6029 return p + 4;
6030 }
6031
6032 static bfd_byte *
6033 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
6034 {
6035 p = savegpr0 (abfd, p, r);
6036 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
6037 p = p + 4;
6038 bfd_put_32 (abfd, BLR, p);
6039 return p + 4;
6040 }
6041
6042 static bfd_byte *
6043 restgpr0 (bfd *abfd, bfd_byte *p, int r)
6044 {
6045 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6046 return p + 4;
6047 }
6048
6049 static bfd_byte *
6050 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
6051 {
6052 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
6053 p = p + 4;
6054 p = restgpr0 (abfd, p, r);
6055 bfd_put_32 (abfd, MTLR_R0, p);
6056 p = p + 4;
6057 if (r == 29)
6058 {
6059 p = restgpr0 (abfd, p, 30);
6060 p = restgpr0 (abfd, p, 31);
6061 }
6062 bfd_put_32 (abfd, BLR, p);
6063 return p + 4;
6064 }
6065
6066 static bfd_byte *
6067 savegpr1 (bfd *abfd, bfd_byte *p, int r)
6068 {
6069 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6070 return p + 4;
6071 }
6072
6073 static bfd_byte *
6074 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
6075 {
6076 p = savegpr1 (abfd, p, r);
6077 bfd_put_32 (abfd, BLR, p);
6078 return p + 4;
6079 }
6080
6081 static bfd_byte *
6082 restgpr1 (bfd *abfd, bfd_byte *p, int r)
6083 {
6084 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6085 return p + 4;
6086 }
6087
6088 static bfd_byte *
6089 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
6090 {
6091 p = restgpr1 (abfd, p, r);
6092 bfd_put_32 (abfd, BLR, p);
6093 return p + 4;
6094 }
6095
6096 static bfd_byte *
6097 savefpr (bfd *abfd, bfd_byte *p, int r)
6098 {
6099 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6100 return p + 4;
6101 }
6102
6103 static bfd_byte *
6104 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
6105 {
6106 p = savefpr (abfd, p, r);
6107 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
6108 p = p + 4;
6109 bfd_put_32 (abfd, BLR, p);
6110 return p + 4;
6111 }
6112
6113 static bfd_byte *
6114 restfpr (bfd *abfd, bfd_byte *p, int r)
6115 {
6116 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6117 return p + 4;
6118 }
6119
6120 static bfd_byte *
6121 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
6122 {
6123 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
6124 p = p + 4;
6125 p = restfpr (abfd, p, r);
6126 bfd_put_32 (abfd, MTLR_R0, p);
6127 p = p + 4;
6128 if (r == 29)
6129 {
6130 p = restfpr (abfd, p, 30);
6131 p = restfpr (abfd, p, 31);
6132 }
6133 bfd_put_32 (abfd, BLR, p);
6134 return p + 4;
6135 }
6136
6137 static bfd_byte *
6138 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
6139 {
6140 p = savefpr (abfd, p, r);
6141 bfd_put_32 (abfd, BLR, p);
6142 return p + 4;
6143 }
6144
6145 static bfd_byte *
6146 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
6147 {
6148 p = restfpr (abfd, p, r);
6149 bfd_put_32 (abfd, BLR, p);
6150 return p + 4;
6151 }
6152
6153 static bfd_byte *
6154 savevr (bfd *abfd, bfd_byte *p, int r)
6155 {
6156 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6157 p = p + 4;
6158 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
6159 return p + 4;
6160 }
6161
6162 static bfd_byte *
6163 savevr_tail (bfd *abfd, bfd_byte *p, int r)
6164 {
6165 p = savevr (abfd, p, r);
6166 bfd_put_32 (abfd, BLR, p);
6167 return p + 4;
6168 }
6169
6170 static bfd_byte *
6171 restvr (bfd *abfd, bfd_byte *p, int r)
6172 {
6173 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6174 p = p + 4;
6175 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
6176 return p + 4;
6177 }
6178
6179 static bfd_byte *
6180 restvr_tail (bfd *abfd, bfd_byte *p, int r)
6181 {
6182 p = restvr (abfd, p, r);
6183 bfd_put_32 (abfd, BLR, p);
6184 return p + 4;
6185 }
6186
6187 /* Called via elf_link_hash_traverse to transfer dynamic linking
6188 information on function code symbol entries to their corresponding
6189 function descriptor symbol entries. */
6190
6191 static bfd_boolean
6192 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
6193 {
6194 struct bfd_link_info *info;
6195 struct ppc_link_hash_table *htab;
6196 struct plt_entry *ent;
6197 struct ppc_link_hash_entry *fh;
6198 struct ppc_link_hash_entry *fdh;
6199 bfd_boolean force_local;
6200
6201 fh = (struct ppc_link_hash_entry *) h;
6202 if (fh->elf.root.type == bfd_link_hash_indirect)
6203 return TRUE;
6204
6205 if (fh->elf.root.type == bfd_link_hash_warning)
6206 fh = (struct ppc_link_hash_entry *) fh->elf.root.u.i.link;
6207
6208 info = inf;
6209 htab = ppc_hash_table (info);
6210 if (htab == NULL)
6211 return FALSE;
6212
6213 /* Resolve undefined references to dot-symbols as the value
6214 in the function descriptor, if we have one in a regular object.
6215 This is to satisfy cases like ".quad .foo". Calls to functions
6216 in dynamic objects are handled elsewhere. */
6217 if (fh->elf.root.type == bfd_link_hash_undefweak
6218 && fh->was_undefined
6219 && (fdh = defined_func_desc (fh)) != NULL
6220 && get_opd_info (fdh->elf.root.u.def.section) != NULL
6221 && opd_entry_value (fdh->elf.root.u.def.section,
6222 fdh->elf.root.u.def.value,
6223 &fh->elf.root.u.def.section,
6224 &fh->elf.root.u.def.value) != (bfd_vma) -1)
6225 {
6226 fh->elf.root.type = fdh->elf.root.type;
6227 fh->elf.forced_local = 1;
6228 fh->elf.def_regular = fdh->elf.def_regular;
6229 fh->elf.def_dynamic = fdh->elf.def_dynamic;
6230 }
6231
6232 /* If this is a function code symbol, transfer dynamic linking
6233 information to the function descriptor symbol. */
6234 if (!fh->is_func)
6235 return TRUE;
6236
6237 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
6238 if (ent->plt.refcount > 0)
6239 break;
6240 if (ent == NULL
6241 || fh->elf.root.root.string[0] != '.'
6242 || fh->elf.root.root.string[1] == '\0')
6243 return TRUE;
6244
6245 /* Find the corresponding function descriptor symbol. Create it
6246 as undefined if necessary. */
6247
6248 fdh = lookup_fdh (fh, htab);
6249 if (fdh == NULL
6250 && !info->executable
6251 && (fh->elf.root.type == bfd_link_hash_undefined
6252 || fh->elf.root.type == bfd_link_hash_undefweak))
6253 {
6254 fdh = make_fdh (info, fh);
6255 if (fdh == NULL)
6256 return FALSE;
6257 }
6258
6259 /* Fake function descriptors are made undefweak. If the function
6260 code symbol is strong undefined, make the fake sym the same.
6261 If the function code symbol is defined, then force the fake
6262 descriptor local; We can't support overriding of symbols in a
6263 shared library on a fake descriptor. */
6264
6265 if (fdh != NULL
6266 && fdh->fake
6267 && fdh->elf.root.type == bfd_link_hash_undefweak)
6268 {
6269 if (fh->elf.root.type == bfd_link_hash_undefined)
6270 {
6271 fdh->elf.root.type = bfd_link_hash_undefined;
6272 bfd_link_add_undef (&htab->elf.root, &fdh->elf.root);
6273 }
6274 else if (fh->elf.root.type == bfd_link_hash_defined
6275 || fh->elf.root.type == bfd_link_hash_defweak)
6276 {
6277 _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE);
6278 }
6279 }
6280
6281 if (fdh != NULL
6282 && !fdh->elf.forced_local
6283 && (!info->executable
6284 || fdh->elf.def_dynamic
6285 || fdh->elf.ref_dynamic
6286 || (fdh->elf.root.type == bfd_link_hash_undefweak
6287 && ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT)))
6288 {
6289 if (fdh->elf.dynindx == -1)
6290 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
6291 return FALSE;
6292 fdh->elf.ref_regular |= fh->elf.ref_regular;
6293 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
6294 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
6295 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
6296 if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT)
6297 {
6298 move_plt_plist (fh, fdh);
6299 fdh->elf.needs_plt = 1;
6300 }
6301 fdh->is_func_descriptor = 1;
6302 fdh->oh = fh;
6303 fh->oh = fdh;
6304 }
6305
6306 /* Now that the info is on the function descriptor, clear the
6307 function code sym info. Any function code syms for which we
6308 don't have a definition in a regular file, we force local.
6309 This prevents a shared library from exporting syms that have
6310 been imported from another library. Function code syms that
6311 are really in the library we must leave global to prevent the
6312 linker dragging in a definition from a static library. */
6313 force_local = (!fh->elf.def_regular
6314 || fdh == NULL
6315 || !fdh->elf.def_regular
6316 || fdh->elf.forced_local);
6317 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
6318
6319 return TRUE;
6320 }
6321
6322 /* Called near the start of bfd_elf_size_dynamic_sections. We use
6323 this hook to a) provide some gcc support functions, and b) transfer
6324 dynamic linking information gathered so far on function code symbol
6325 entries, to their corresponding function descriptor symbol entries. */
6326
6327 static bfd_boolean
6328 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
6329 struct bfd_link_info *info)
6330 {
6331 struct ppc_link_hash_table *htab;
6332 unsigned int i;
6333 const struct sfpr_def_parms funcs[] =
6334 {
6335 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
6336 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
6337 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
6338 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
6339 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
6340 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
6341 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
6342 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
6343 { "._savef", 14, 31, savefpr, savefpr1_tail },
6344 { "._restf", 14, 31, restfpr, restfpr1_tail },
6345 { "_savevr_", 20, 31, savevr, savevr_tail },
6346 { "_restvr_", 20, 31, restvr, restvr_tail }
6347 };
6348
6349 htab = ppc_hash_table (info);
6350 if (htab == NULL)
6351 return FALSE;
6352
6353 if (htab->sfpr == NULL)
6354 /* We don't have any relocs. */
6355 return TRUE;
6356
6357 /* Provide any missing _save* and _rest* functions. */
6358 htab->sfpr->size = 0;
6359 for (i = 0; i < sizeof (funcs) / sizeof (funcs[0]); i++)
6360 if (!sfpr_define (info, &funcs[i]))
6361 return FALSE;
6362
6363 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
6364
6365 if (htab->sfpr->size == 0)
6366 htab->sfpr->flags |= SEC_EXCLUDE;
6367
6368 return TRUE;
6369 }
6370
6371 /* Adjust a symbol defined by a dynamic object and referenced by a
6372 regular object. The current definition is in some section of the
6373 dynamic object, but we're not including those sections. We have to
6374 change the definition to something the rest of the link can
6375 understand. */
6376
6377 static bfd_boolean
6378 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
6379 struct elf_link_hash_entry *h)
6380 {
6381 struct ppc_link_hash_table *htab;
6382 asection *s;
6383
6384 htab = ppc_hash_table (info);
6385 if (htab == NULL)
6386 return FALSE;
6387
6388 /* Deal with function syms. */
6389 if (h->type == STT_FUNC
6390 || h->type == STT_GNU_IFUNC
6391 || h->needs_plt)
6392 {
6393 /* Clear procedure linkage table information for any symbol that
6394 won't need a .plt entry. */
6395 struct plt_entry *ent;
6396 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6397 if (ent->plt.refcount > 0)
6398 break;
6399 if (ent == NULL
6400 || (h->type != STT_GNU_IFUNC
6401 && (SYMBOL_CALLS_LOCAL (info, h)
6402 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
6403 && h->root.type == bfd_link_hash_undefweak))))
6404 {
6405 h->plt.plist = NULL;
6406 h->needs_plt = 0;
6407 }
6408 }
6409 else
6410 h->plt.plist = NULL;
6411
6412 /* If this is a weak symbol, and there is a real definition, the
6413 processor independent code will have arranged for us to see the
6414 real definition first, and we can just use the same value. */
6415 if (h->u.weakdef != NULL)
6416 {
6417 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
6418 || h->u.weakdef->root.type == bfd_link_hash_defweak);
6419 h->root.u.def.section = h->u.weakdef->root.u.def.section;
6420 h->root.u.def.value = h->u.weakdef->root.u.def.value;
6421 if (ELIMINATE_COPY_RELOCS)
6422 h->non_got_ref = h->u.weakdef->non_got_ref;
6423 return TRUE;
6424 }
6425
6426 /* If we are creating a shared library, we must presume that the
6427 only references to the symbol are via the global offset table.
6428 For such cases we need not do anything here; the relocations will
6429 be handled correctly by relocate_section. */
6430 if (info->shared)
6431 return TRUE;
6432
6433 /* If there are no references to this symbol that do not use the
6434 GOT, we don't need to generate a copy reloc. */
6435 if (!h->non_got_ref)
6436 return TRUE;
6437
6438 /* Don't generate a copy reloc for symbols defined in the executable. */
6439 if (!h->def_dynamic || !h->ref_regular || h->def_regular)
6440 return TRUE;
6441
6442 if (ELIMINATE_COPY_RELOCS)
6443 {
6444 struct ppc_link_hash_entry * eh;
6445 struct ppc_dyn_relocs *p;
6446
6447 eh = (struct ppc_link_hash_entry *) h;
6448 for (p = eh->dyn_relocs; p != NULL; p = p->next)
6449 {
6450 s = p->sec->output_section;
6451 if (s != NULL && (s->flags & SEC_READONLY) != 0)
6452 break;
6453 }
6454
6455 /* If we didn't find any dynamic relocs in read-only sections, then
6456 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
6457 if (p == NULL)
6458 {
6459 h->non_got_ref = 0;
6460 return TRUE;
6461 }
6462 }
6463
6464 if (h->plt.plist != NULL)
6465 {
6466 /* We should never get here, but unfortunately there are versions
6467 of gcc out there that improperly (for this ABI) put initialized
6468 function pointers, vtable refs and suchlike in read-only
6469 sections. Allow them to proceed, but warn that this might
6470 break at runtime. */
6471 (*_bfd_error_handler)
6472 (_("copy reloc against `%s' requires lazy plt linking; "
6473 "avoid setting LD_BIND_NOW=1 or upgrade gcc"),
6474 h->root.root.string);
6475 }
6476
6477 /* This is a reference to a symbol defined by a dynamic object which
6478 is not a function. */
6479
6480 if (h->size == 0)
6481 {
6482 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
6483 h->root.root.string);
6484 return TRUE;
6485 }
6486
6487 /* We must allocate the symbol in our .dynbss section, which will
6488 become part of the .bss section of the executable. There will be
6489 an entry for this symbol in the .dynsym section. The dynamic
6490 object will contain position independent code, so all references
6491 from the dynamic object to this symbol will go through the global
6492 offset table. The dynamic linker will use the .dynsym entry to
6493 determine the address it must put in the global offset table, so
6494 both the dynamic object and the regular object will refer to the
6495 same memory location for the variable. */
6496
6497 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
6498 to copy the initial value out of the dynamic object and into the
6499 runtime process image. We need to remember the offset into the
6500 .rela.bss section we are going to use. */
6501 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
6502 {
6503 htab->relbss->size += sizeof (Elf64_External_Rela);
6504 h->needs_copy = 1;
6505 }
6506
6507 s = htab->dynbss;
6508
6509 return _bfd_elf_adjust_dynamic_copy (h, s);
6510 }
6511
6512 /* If given a function descriptor symbol, hide both the function code
6513 sym and the descriptor. */
6514 static void
6515 ppc64_elf_hide_symbol (struct bfd_link_info *info,
6516 struct elf_link_hash_entry *h,
6517 bfd_boolean force_local)
6518 {
6519 struct ppc_link_hash_entry *eh;
6520 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
6521
6522 eh = (struct ppc_link_hash_entry *) h;
6523 if (eh->is_func_descriptor)
6524 {
6525 struct ppc_link_hash_entry *fh = eh->oh;
6526
6527 if (fh == NULL)
6528 {
6529 const char *p, *q;
6530 struct ppc_link_hash_table *htab;
6531 char save;
6532
6533 /* We aren't supposed to use alloca in BFD because on
6534 systems which do not have alloca the version in libiberty
6535 calls xmalloc, which might cause the program to crash
6536 when it runs out of memory. This function doesn't have a
6537 return status, so there's no way to gracefully return an
6538 error. So cheat. We know that string[-1] can be safely
6539 accessed; It's either a string in an ELF string table,
6540 or allocated in an objalloc structure. */
6541
6542 p = eh->elf.root.root.string - 1;
6543 save = *p;
6544 *(char *) p = '.';
6545 htab = ppc_hash_table (info);
6546 if (htab == NULL)
6547 return;
6548
6549 fh = (struct ppc_link_hash_entry *)
6550 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
6551 *(char *) p = save;
6552
6553 /* Unfortunately, if it so happens that the string we were
6554 looking for was allocated immediately before this string,
6555 then we overwrote the string terminator. That's the only
6556 reason the lookup should fail. */
6557 if (fh == NULL)
6558 {
6559 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
6560 while (q >= eh->elf.root.root.string && *q == *p)
6561 --q, --p;
6562 if (q < eh->elf.root.root.string && *p == '.')
6563 fh = (struct ppc_link_hash_entry *)
6564 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
6565 }
6566 if (fh != NULL)
6567 {
6568 eh->oh = fh;
6569 fh->oh = eh;
6570 }
6571 }
6572 if (fh != NULL)
6573 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
6574 }
6575 }
6576
6577 static bfd_boolean
6578 get_sym_h (struct elf_link_hash_entry **hp,
6579 Elf_Internal_Sym **symp,
6580 asection **symsecp,
6581 unsigned char **tls_maskp,
6582 Elf_Internal_Sym **locsymsp,
6583 unsigned long r_symndx,
6584 bfd *ibfd)
6585 {
6586 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
6587
6588 if (r_symndx >= symtab_hdr->sh_info)
6589 {
6590 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
6591 struct elf_link_hash_entry *h;
6592
6593 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
6594 h = elf_follow_link (h);
6595
6596 if (hp != NULL)
6597 *hp = h;
6598
6599 if (symp != NULL)
6600 *symp = NULL;
6601
6602 if (symsecp != NULL)
6603 {
6604 asection *symsec = NULL;
6605 if (h->root.type == bfd_link_hash_defined
6606 || h->root.type == bfd_link_hash_defweak)
6607 symsec = h->root.u.def.section;
6608 *symsecp = symsec;
6609 }
6610
6611 if (tls_maskp != NULL)
6612 {
6613 struct ppc_link_hash_entry *eh;
6614
6615 eh = (struct ppc_link_hash_entry *) h;
6616 *tls_maskp = &eh->tls_mask;
6617 }
6618 }
6619 else
6620 {
6621 Elf_Internal_Sym *sym;
6622 Elf_Internal_Sym *locsyms = *locsymsp;
6623
6624 if (locsyms == NULL)
6625 {
6626 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
6627 if (locsyms == NULL)
6628 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
6629 symtab_hdr->sh_info,
6630 0, NULL, NULL, NULL);
6631 if (locsyms == NULL)
6632 return FALSE;
6633 *locsymsp = locsyms;
6634 }
6635 sym = locsyms + r_symndx;
6636
6637 if (hp != NULL)
6638 *hp = NULL;
6639
6640 if (symp != NULL)
6641 *symp = sym;
6642
6643 if (symsecp != NULL)
6644 *symsecp = bfd_section_from_elf_index (ibfd, sym->st_shndx);
6645
6646 if (tls_maskp != NULL)
6647 {
6648 struct got_entry **lgot_ents;
6649 unsigned char *tls_mask;
6650
6651 tls_mask = NULL;
6652 lgot_ents = elf_local_got_ents (ibfd);
6653 if (lgot_ents != NULL)
6654 {
6655 struct plt_entry **local_plt = (struct plt_entry **)
6656 (lgot_ents + symtab_hdr->sh_info);
6657 unsigned char *lgot_masks = (unsigned char *)
6658 (local_plt + symtab_hdr->sh_info);
6659 tls_mask = &lgot_masks[r_symndx];
6660 }
6661 *tls_maskp = tls_mask;
6662 }
6663 }
6664 return TRUE;
6665 }
6666
6667 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
6668 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
6669 type suitable for optimization, and 1 otherwise. */
6670
6671 static int
6672 get_tls_mask (unsigned char **tls_maskp,
6673 unsigned long *toc_symndx,
6674 bfd_vma *toc_addend,
6675 Elf_Internal_Sym **locsymsp,
6676 const Elf_Internal_Rela *rel,
6677 bfd *ibfd)
6678 {
6679 unsigned long r_symndx;
6680 int next_r;
6681 struct elf_link_hash_entry *h;
6682 Elf_Internal_Sym *sym;
6683 asection *sec;
6684 bfd_vma off;
6685
6686 r_symndx = ELF64_R_SYM (rel->r_info);
6687 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
6688 return 0;
6689
6690 if ((*tls_maskp != NULL && **tls_maskp != 0)
6691 || sec == NULL
6692 || ppc64_elf_section_data (sec)->sec_type != sec_toc)
6693 return 1;
6694
6695 /* Look inside a TOC section too. */
6696 if (h != NULL)
6697 {
6698 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
6699 off = h->root.u.def.value;
6700 }
6701 else
6702 off = sym->st_value;
6703 off += rel->r_addend;
6704 BFD_ASSERT (off % 8 == 0);
6705 r_symndx = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8];
6706 next_r = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8 + 1];
6707 if (toc_symndx != NULL)
6708 *toc_symndx = r_symndx;
6709 if (toc_addend != NULL)
6710 *toc_addend = ppc64_elf_section_data (sec)->u.toc.add[off / 8];
6711 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
6712 return 0;
6713 if ((h == NULL || is_static_defined (h))
6714 && (next_r == -1 || next_r == -2))
6715 return 1 - next_r;
6716 return 1;
6717 }
6718
6719 /* Adjust all global syms defined in opd sections. In gcc generated
6720 code for the old ABI, these will already have been done. */
6721
6722 static bfd_boolean
6723 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
6724 {
6725 struct ppc_link_hash_entry *eh;
6726 asection *sym_sec;
6727 struct _opd_sec_data *opd;
6728
6729 if (h->root.type == bfd_link_hash_indirect)
6730 return TRUE;
6731
6732 if (h->root.type == bfd_link_hash_warning)
6733 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6734
6735 if (h->root.type != bfd_link_hash_defined
6736 && h->root.type != bfd_link_hash_defweak)
6737 return TRUE;
6738
6739 eh = (struct ppc_link_hash_entry *) h;
6740 if (eh->adjust_done)
6741 return TRUE;
6742
6743 sym_sec = eh->elf.root.u.def.section;
6744 opd = get_opd_info (sym_sec);
6745 if (opd != NULL && opd->adjust != NULL)
6746 {
6747 long adjust = opd->adjust[eh->elf.root.u.def.value / 8];
6748 if (adjust == -1)
6749 {
6750 /* This entry has been deleted. */
6751 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
6752 if (dsec == NULL)
6753 {
6754 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
6755 if (elf_discarded_section (dsec))
6756 {
6757 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
6758 break;
6759 }
6760 }
6761 eh->elf.root.u.def.value = 0;
6762 eh->elf.root.u.def.section = dsec;
6763 }
6764 else
6765 eh->elf.root.u.def.value += adjust;
6766 eh->adjust_done = 1;
6767 }
6768 return TRUE;
6769 }
6770
6771 /* Handles decrementing dynamic reloc counts for the reloc specified by
6772 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM_SEC
6773 have already been determined. */
6774
6775 static bfd_boolean
6776 dec_dynrel_count (bfd_vma r_info,
6777 asection *sec,
6778 struct bfd_link_info *info,
6779 Elf_Internal_Sym **local_syms,
6780 struct elf_link_hash_entry *h,
6781 asection *sym_sec)
6782 {
6783 enum elf_ppc64_reloc_type r_type;
6784 struct ppc_dyn_relocs *p;
6785 struct ppc_dyn_relocs **pp;
6786
6787 /* Can this reloc be dynamic? This switch, and later tests here
6788 should be kept in sync with the code in check_relocs. */
6789 r_type = ELF64_R_TYPE (r_info);
6790 switch (r_type)
6791 {
6792 default:
6793 return TRUE;
6794
6795 case R_PPC64_TPREL16:
6796 case R_PPC64_TPREL16_LO:
6797 case R_PPC64_TPREL16_HI:
6798 case R_PPC64_TPREL16_HA:
6799 case R_PPC64_TPREL16_DS:
6800 case R_PPC64_TPREL16_LO_DS:
6801 case R_PPC64_TPREL16_HIGHER:
6802 case R_PPC64_TPREL16_HIGHERA:
6803 case R_PPC64_TPREL16_HIGHEST:
6804 case R_PPC64_TPREL16_HIGHESTA:
6805 if (!info->shared)
6806 return TRUE;
6807
6808 case R_PPC64_TPREL64:
6809 case R_PPC64_DTPMOD64:
6810 case R_PPC64_DTPREL64:
6811 case R_PPC64_ADDR64:
6812 case R_PPC64_REL30:
6813 case R_PPC64_REL32:
6814 case R_PPC64_REL64:
6815 case R_PPC64_ADDR14:
6816 case R_PPC64_ADDR14_BRNTAKEN:
6817 case R_PPC64_ADDR14_BRTAKEN:
6818 case R_PPC64_ADDR16:
6819 case R_PPC64_ADDR16_DS:
6820 case R_PPC64_ADDR16_HA:
6821 case R_PPC64_ADDR16_HI:
6822 case R_PPC64_ADDR16_HIGHER:
6823 case R_PPC64_ADDR16_HIGHERA:
6824 case R_PPC64_ADDR16_HIGHEST:
6825 case R_PPC64_ADDR16_HIGHESTA:
6826 case R_PPC64_ADDR16_LO:
6827 case R_PPC64_ADDR16_LO_DS:
6828 case R_PPC64_ADDR24:
6829 case R_PPC64_ADDR32:
6830 case R_PPC64_UADDR16:
6831 case R_PPC64_UADDR32:
6832 case R_PPC64_UADDR64:
6833 case R_PPC64_TOC:
6834 break;
6835 }
6836
6837 if (local_syms != NULL)
6838 {
6839 unsigned long r_symndx;
6840 Elf_Internal_Sym *sym;
6841 bfd *ibfd = sec->owner;
6842
6843 r_symndx = ELF64_R_SYM (r_info);
6844 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
6845 return FALSE;
6846 }
6847
6848 if ((info->shared
6849 && (must_be_dyn_reloc (info, r_type)
6850 || (h != NULL
6851 && (!info->symbolic
6852 || h->root.type == bfd_link_hash_defweak
6853 || !h->def_regular))))
6854 || (ELIMINATE_COPY_RELOCS
6855 && !info->shared
6856 && h != NULL
6857 && (h->root.type == bfd_link_hash_defweak
6858 || !h->def_regular)))
6859 ;
6860 else
6861 return TRUE;
6862
6863 if (h != NULL)
6864 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
6865 else
6866 {
6867 if (sym_sec != NULL)
6868 {
6869 void *vpp = &elf_section_data (sym_sec)->local_dynrel;
6870 pp = (struct ppc_dyn_relocs **) vpp;
6871 }
6872 else
6873 {
6874 void *vpp = &elf_section_data (sec)->local_dynrel;
6875 pp = (struct ppc_dyn_relocs **) vpp;
6876 }
6877
6878 /* elf_gc_sweep may have already removed all dyn relocs associated
6879 with local syms for a given section. Don't report a dynreloc
6880 miscount. */
6881 if (*pp == NULL)
6882 return TRUE;
6883 }
6884
6885 while ((p = *pp) != NULL)
6886 {
6887 if (p->sec == sec)
6888 {
6889 if (!must_be_dyn_reloc (info, r_type))
6890 p->pc_count -= 1;
6891 p->count -= 1;
6892 if (p->count == 0)
6893 *pp = p->next;
6894 return TRUE;
6895 }
6896 pp = &p->next;
6897 }
6898
6899 (*_bfd_error_handler) (_("dynreloc miscount for %B, section %A"),
6900 sec->owner, sec);
6901 bfd_set_error (bfd_error_bad_value);
6902 return FALSE;
6903 }
6904
6905 /* Remove unused Official Procedure Descriptor entries. Currently we
6906 only remove those associated with functions in discarded link-once
6907 sections, or weakly defined functions that have been overridden. It
6908 would be possible to remove many more entries for statically linked
6909 applications. */
6910
6911 bfd_boolean
6912 ppc64_elf_edit_opd (struct bfd_link_info *info, bfd_boolean non_overlapping)
6913 {
6914 bfd *ibfd;
6915 bfd_boolean some_edited = FALSE;
6916 asection *need_pad = NULL;
6917
6918 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6919 {
6920 asection *sec;
6921 Elf_Internal_Rela *relstart, *rel, *relend;
6922 Elf_Internal_Shdr *symtab_hdr;
6923 Elf_Internal_Sym *local_syms;
6924 bfd_vma offset;
6925 struct _opd_sec_data *opd;
6926 bfd_boolean need_edit, add_aux_fields;
6927 bfd_size_type cnt_16b = 0;
6928
6929 if (!is_ppc64_elf (ibfd))
6930 continue;
6931
6932 sec = bfd_get_section_by_name (ibfd, ".opd");
6933 if (sec == NULL || sec->size == 0)
6934 continue;
6935
6936 if (sec->sec_info_type == ELF_INFO_TYPE_JUST_SYMS)
6937 continue;
6938
6939 if (sec->output_section == bfd_abs_section_ptr)
6940 continue;
6941
6942 /* Look through the section relocs. */
6943 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
6944 continue;
6945
6946 local_syms = NULL;
6947 symtab_hdr = &elf_symtab_hdr (ibfd);
6948
6949 /* Read the relocations. */
6950 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
6951 info->keep_memory);
6952 if (relstart == NULL)
6953 return FALSE;
6954
6955 /* First run through the relocs to check they are sane, and to
6956 determine whether we need to edit this opd section. */
6957 need_edit = FALSE;
6958 need_pad = sec;
6959 offset = 0;
6960 relend = relstart + sec->reloc_count;
6961 for (rel = relstart; rel < relend; )
6962 {
6963 enum elf_ppc64_reloc_type r_type;
6964 unsigned long r_symndx;
6965 asection *sym_sec;
6966 struct elf_link_hash_entry *h;
6967 Elf_Internal_Sym *sym;
6968
6969 /* .opd contains a regular array of 16 or 24 byte entries. We're
6970 only interested in the reloc pointing to a function entry
6971 point. */
6972 if (rel->r_offset != offset
6973 || rel + 1 >= relend
6974 || (rel + 1)->r_offset != offset + 8)
6975 {
6976 /* If someone messes with .opd alignment then after a
6977 "ld -r" we might have padding in the middle of .opd.
6978 Also, there's nothing to prevent someone putting
6979 something silly in .opd with the assembler. No .opd
6980 optimization for them! */
6981 broken_opd:
6982 (*_bfd_error_handler)
6983 (_("%B: .opd is not a regular array of opd entries"), ibfd);
6984 need_edit = FALSE;
6985 break;
6986 }
6987
6988 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
6989 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
6990 {
6991 (*_bfd_error_handler)
6992 (_("%B: unexpected reloc type %u in .opd section"),
6993 ibfd, r_type);
6994 need_edit = FALSE;
6995 break;
6996 }
6997
6998 r_symndx = ELF64_R_SYM (rel->r_info);
6999 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7000 r_symndx, ibfd))
7001 goto error_ret;
7002
7003 if (sym_sec == NULL || sym_sec->owner == NULL)
7004 {
7005 const char *sym_name;
7006 if (h != NULL)
7007 sym_name = h->root.root.string;
7008 else
7009 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
7010 sym_sec);
7011
7012 (*_bfd_error_handler)
7013 (_("%B: undefined sym `%s' in .opd section"),
7014 ibfd, sym_name);
7015 need_edit = FALSE;
7016 break;
7017 }
7018
7019 /* opd entries are always for functions defined in the
7020 current input bfd. If the symbol isn't defined in the
7021 input bfd, then we won't be using the function in this
7022 bfd; It must be defined in a linkonce section in another
7023 bfd, or is weak. It's also possible that we are
7024 discarding the function due to a linker script /DISCARD/,
7025 which we test for via the output_section. */
7026 if (sym_sec->owner != ibfd
7027 || sym_sec->output_section == bfd_abs_section_ptr)
7028 need_edit = TRUE;
7029
7030 rel += 2;
7031 if (rel == relend
7032 || (rel + 1 == relend && rel->r_offset == offset + 16))
7033 {
7034 if (sec->size == offset + 24)
7035 {
7036 need_pad = NULL;
7037 break;
7038 }
7039 if (rel == relend && sec->size == offset + 16)
7040 {
7041 cnt_16b++;
7042 break;
7043 }
7044 goto broken_opd;
7045 }
7046
7047 if (rel->r_offset == offset + 24)
7048 offset += 24;
7049 else if (rel->r_offset != offset + 16)
7050 goto broken_opd;
7051 else if (rel + 1 < relend
7052 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
7053 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
7054 {
7055 offset += 16;
7056 cnt_16b++;
7057 }
7058 else if (rel + 2 < relend
7059 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_ADDR64
7060 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC)
7061 {
7062 offset += 24;
7063 rel += 1;
7064 }
7065 else
7066 goto broken_opd;
7067 }
7068
7069 add_aux_fields = non_overlapping && cnt_16b > 0;
7070
7071 if (need_edit || add_aux_fields)
7072 {
7073 Elf_Internal_Rela *write_rel;
7074 bfd_byte *rptr, *wptr;
7075 bfd_byte *new_contents;
7076 bfd_boolean skip;
7077 long opd_ent_size;
7078 bfd_size_type amt;
7079
7080 new_contents = NULL;
7081 amt = sec->size * sizeof (long) / 8;
7082 opd = &ppc64_elf_section_data (sec)->u.opd;
7083 opd->adjust = bfd_zalloc (sec->owner, amt);
7084 if (opd->adjust == NULL)
7085 return FALSE;
7086 ppc64_elf_section_data (sec)->sec_type = sec_opd;
7087
7088 /* This seems a waste of time as input .opd sections are all
7089 zeros as generated by gcc, but I suppose there's no reason
7090 this will always be so. We might start putting something in
7091 the third word of .opd entries. */
7092 if ((sec->flags & SEC_IN_MEMORY) == 0)
7093 {
7094 bfd_byte *loc;
7095 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
7096 {
7097 if (loc != NULL)
7098 free (loc);
7099 error_ret:
7100 if (local_syms != NULL
7101 && symtab_hdr->contents != (unsigned char *) local_syms)
7102 free (local_syms);
7103 if (elf_section_data (sec)->relocs != relstart)
7104 free (relstart);
7105 return FALSE;
7106 }
7107 sec->contents = loc;
7108 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
7109 }
7110
7111 elf_section_data (sec)->relocs = relstart;
7112
7113 new_contents = sec->contents;
7114 if (add_aux_fields)
7115 {
7116 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
7117 if (new_contents == NULL)
7118 return FALSE;
7119 need_pad = FALSE;
7120 }
7121 wptr = new_contents;
7122 rptr = sec->contents;
7123
7124 write_rel = relstart;
7125 skip = FALSE;
7126 offset = 0;
7127 opd_ent_size = 0;
7128 for (rel = relstart; rel < relend; rel++)
7129 {
7130 unsigned long r_symndx;
7131 asection *sym_sec;
7132 struct elf_link_hash_entry *h;
7133 Elf_Internal_Sym *sym;
7134
7135 r_symndx = ELF64_R_SYM (rel->r_info);
7136 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7137 r_symndx, ibfd))
7138 goto error_ret;
7139
7140 if (rel->r_offset == offset)
7141 {
7142 struct ppc_link_hash_entry *fdh = NULL;
7143
7144 /* See if the .opd entry is full 24 byte or
7145 16 byte (with fd_aux entry overlapped with next
7146 fd_func). */
7147 opd_ent_size = 24;
7148 if ((rel + 2 == relend && sec->size == offset + 16)
7149 || (rel + 3 < relend
7150 && rel[2].r_offset == offset + 16
7151 && rel[3].r_offset == offset + 24
7152 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_ADDR64
7153 && ELF64_R_TYPE (rel[3].r_info) == R_PPC64_TOC))
7154 opd_ent_size = 16;
7155
7156 if (h != NULL
7157 && h->root.root.string[0] == '.')
7158 {
7159 struct ppc_link_hash_table *htab;
7160
7161 htab = ppc_hash_table (info);
7162 if (htab != NULL)
7163 fdh = lookup_fdh ((struct ppc_link_hash_entry *) h,
7164 htab);
7165 if (fdh != NULL
7166 && fdh->elf.root.type != bfd_link_hash_defined
7167 && fdh->elf.root.type != bfd_link_hash_defweak)
7168 fdh = NULL;
7169 }
7170
7171 skip = (sym_sec->owner != ibfd
7172 || sym_sec->output_section == bfd_abs_section_ptr);
7173 if (skip)
7174 {
7175 if (fdh != NULL && sym_sec->owner == ibfd)
7176 {
7177 /* Arrange for the function descriptor sym
7178 to be dropped. */
7179 fdh->elf.root.u.def.value = 0;
7180 fdh->elf.root.u.def.section = sym_sec;
7181 }
7182 opd->adjust[rel->r_offset / 8] = -1;
7183 }
7184 else
7185 {
7186 /* We'll be keeping this opd entry. */
7187
7188 if (fdh != NULL)
7189 {
7190 /* Redefine the function descriptor symbol to
7191 this location in the opd section. It is
7192 necessary to update the value here rather
7193 than using an array of adjustments as we do
7194 for local symbols, because various places
7195 in the generic ELF code use the value
7196 stored in u.def.value. */
7197 fdh->elf.root.u.def.value = wptr - new_contents;
7198 fdh->adjust_done = 1;
7199 }
7200
7201 /* Local syms are a bit tricky. We could
7202 tweak them as they can be cached, but
7203 we'd need to look through the local syms
7204 for the function descriptor sym which we
7205 don't have at the moment. So keep an
7206 array of adjustments. */
7207 opd->adjust[rel->r_offset / 8]
7208 = (wptr - new_contents) - (rptr - sec->contents);
7209
7210 if (wptr != rptr)
7211 memcpy (wptr, rptr, opd_ent_size);
7212 wptr += opd_ent_size;
7213 if (add_aux_fields && opd_ent_size == 16)
7214 {
7215 memset (wptr, '\0', 8);
7216 wptr += 8;
7217 }
7218 }
7219 rptr += opd_ent_size;
7220 offset += opd_ent_size;
7221 }
7222
7223 if (skip)
7224 {
7225 if (!NO_OPD_RELOCS
7226 && !info->relocatable
7227 && !dec_dynrel_count (rel->r_info, sec, info,
7228 NULL, h, sym_sec))
7229 goto error_ret;
7230 }
7231 else
7232 {
7233 /* We need to adjust any reloc offsets to point to the
7234 new opd entries. While we're at it, we may as well
7235 remove redundant relocs. */
7236 rel->r_offset += opd->adjust[(offset - opd_ent_size) / 8];
7237 if (write_rel != rel)
7238 memcpy (write_rel, rel, sizeof (*rel));
7239 ++write_rel;
7240 }
7241 }
7242
7243 sec->size = wptr - new_contents;
7244 sec->reloc_count = write_rel - relstart;
7245 if (add_aux_fields)
7246 {
7247 free (sec->contents);
7248 sec->contents = new_contents;
7249 }
7250
7251 /* Fudge the header size too, as this is used later in
7252 elf_bfd_final_link if we are emitting relocs. */
7253 elf_section_data (sec)->rel_hdr.sh_size
7254 = sec->reloc_count * elf_section_data (sec)->rel_hdr.sh_entsize;
7255 BFD_ASSERT (elf_section_data (sec)->rel_hdr2 == NULL);
7256 some_edited = TRUE;
7257 }
7258 else if (elf_section_data (sec)->relocs != relstart)
7259 free (relstart);
7260
7261 if (local_syms != NULL
7262 && symtab_hdr->contents != (unsigned char *) local_syms)
7263 {
7264 if (!info->keep_memory)
7265 free (local_syms);
7266 else
7267 symtab_hdr->contents = (unsigned char *) local_syms;
7268 }
7269 }
7270
7271 if (some_edited)
7272 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
7273
7274 /* If we are doing a final link and the last .opd entry is just 16 byte
7275 long, add a 8 byte padding after it. */
7276 if (need_pad != NULL && !info->relocatable)
7277 {
7278 bfd_byte *p;
7279
7280 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
7281 {
7282 BFD_ASSERT (need_pad->size > 0);
7283
7284 p = bfd_malloc (need_pad->size + 8);
7285 if (p == NULL)
7286 return FALSE;
7287
7288 if (! bfd_get_section_contents (need_pad->owner, need_pad,
7289 p, 0, need_pad->size))
7290 return FALSE;
7291
7292 need_pad->contents = p;
7293 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
7294 }
7295 else
7296 {
7297 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
7298 if (p == NULL)
7299 return FALSE;
7300
7301 need_pad->contents = p;
7302 }
7303
7304 memset (need_pad->contents + need_pad->size, 0, 8);
7305 need_pad->size += 8;
7306 }
7307
7308 return TRUE;
7309 }
7310
7311 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
7312
7313 asection *
7314 ppc64_elf_tls_setup (struct bfd_link_info *info,
7315 int no_tls_get_addr_opt,
7316 int *no_multi_toc)
7317 {
7318 struct ppc_link_hash_table *htab;
7319
7320 htab = ppc_hash_table (info);
7321 if (htab == NULL)
7322 return NULL;
7323
7324 if (*no_multi_toc)
7325 htab->do_multi_toc = 0;
7326 else if (!htab->do_multi_toc)
7327 *no_multi_toc = 1;
7328
7329 htab->tls_get_addr = ((struct ppc_link_hash_entry *)
7330 elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
7331 FALSE, FALSE, TRUE));
7332 /* Move dynamic linking info to the function descriptor sym. */
7333 if (htab->tls_get_addr != NULL)
7334 func_desc_adjust (&htab->tls_get_addr->elf, info);
7335 htab->tls_get_addr_fd = ((struct ppc_link_hash_entry *)
7336 elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
7337 FALSE, FALSE, TRUE));
7338 if (!no_tls_get_addr_opt)
7339 {
7340 struct elf_link_hash_entry *opt, *opt_fd, *tga, *tga_fd;
7341
7342 opt = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr_opt",
7343 FALSE, FALSE, TRUE);
7344 if (opt != NULL)
7345 func_desc_adjust (opt, info);
7346 opt_fd = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
7347 FALSE, FALSE, TRUE);
7348 if (opt_fd != NULL
7349 && (opt_fd->root.type == bfd_link_hash_defined
7350 || opt_fd->root.type == bfd_link_hash_defweak))
7351 {
7352 /* If glibc supports an optimized __tls_get_addr call stub,
7353 signalled by the presence of __tls_get_addr_opt, and we'll
7354 be calling __tls_get_addr via a plt call stub, then
7355 make __tls_get_addr point to __tls_get_addr_opt. */
7356 tga_fd = &htab->tls_get_addr_fd->elf;
7357 if (htab->elf.dynamic_sections_created
7358 && tga_fd != NULL
7359 && (tga_fd->type == STT_FUNC
7360 || tga_fd->needs_plt)
7361 && !(SYMBOL_CALLS_LOCAL (info, tga_fd)
7362 || (ELF_ST_VISIBILITY (tga_fd->other) != STV_DEFAULT
7363 && tga_fd->root.type == bfd_link_hash_undefweak)))
7364 {
7365 struct plt_entry *ent;
7366
7367 for (ent = tga_fd->plt.plist; ent != NULL; ent = ent->next)
7368 if (ent->plt.refcount > 0)
7369 break;
7370 if (ent != NULL)
7371 {
7372 tga_fd->root.type = bfd_link_hash_indirect;
7373 tga_fd->root.u.i.link = &opt_fd->root;
7374 ppc64_elf_copy_indirect_symbol (info, opt_fd, tga_fd);
7375 if (opt_fd->dynindx != -1)
7376 {
7377 /* Use __tls_get_addr_opt in dynamic relocations. */
7378 opt_fd->dynindx = -1;
7379 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
7380 opt_fd->dynstr_index);
7381 if (!bfd_elf_link_record_dynamic_symbol (info, opt_fd))
7382 return NULL;
7383 }
7384 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) opt_fd;
7385 tga = &htab->tls_get_addr->elf;
7386 if (opt != NULL && tga != NULL)
7387 {
7388 tga->root.type = bfd_link_hash_indirect;
7389 tga->root.u.i.link = &opt->root;
7390 ppc64_elf_copy_indirect_symbol (info, opt, tga);
7391 _bfd_elf_link_hash_hide_symbol (info, opt,
7392 tga->forced_local);
7393 htab->tls_get_addr = (struct ppc_link_hash_entry *) opt;
7394 }
7395 htab->tls_get_addr_fd->oh = htab->tls_get_addr;
7396 htab->tls_get_addr_fd->is_func_descriptor = 1;
7397 if (htab->tls_get_addr != NULL)
7398 {
7399 htab->tls_get_addr->oh = htab->tls_get_addr_fd;
7400 htab->tls_get_addr->is_func = 1;
7401 }
7402 }
7403 }
7404 }
7405 else
7406 no_tls_get_addr_opt = TRUE;
7407 }
7408 htab->no_tls_get_addr_opt = no_tls_get_addr_opt;
7409 return _bfd_elf_tls_setup (info->output_bfd, info);
7410 }
7411
7412 /* Return TRUE iff REL is a branch reloc with a global symbol matching
7413 HASH1 or HASH2. */
7414
7415 static bfd_boolean
7416 branch_reloc_hash_match (const bfd *ibfd,
7417 const Elf_Internal_Rela *rel,
7418 const struct ppc_link_hash_entry *hash1,
7419 const struct ppc_link_hash_entry *hash2)
7420 {
7421 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
7422 enum elf_ppc64_reloc_type r_type = ELF64_R_TYPE (rel->r_info);
7423 unsigned int r_symndx = ELF64_R_SYM (rel->r_info);
7424
7425 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
7426 {
7427 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
7428 struct elf_link_hash_entry *h;
7429
7430 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
7431 h = elf_follow_link (h);
7432 if (h == &hash1->elf || h == &hash2->elf)
7433 return TRUE;
7434 }
7435 return FALSE;
7436 }
7437
7438 /* Run through all the TLS relocs looking for optimization
7439 opportunities. The linker has been hacked (see ppc64elf.em) to do
7440 a preliminary section layout so that we know the TLS segment
7441 offsets. We can't optimize earlier because some optimizations need
7442 to know the tp offset, and we need to optimize before allocating
7443 dynamic relocations. */
7444
7445 bfd_boolean
7446 ppc64_elf_tls_optimize (struct bfd_link_info *info)
7447 {
7448 bfd *ibfd;
7449 asection *sec;
7450 struct ppc_link_hash_table *htab;
7451 int pass;
7452
7453 if (info->relocatable || !info->executable)
7454 return TRUE;
7455
7456 htab = ppc_hash_table (info);
7457 if (htab == NULL)
7458 return FALSE;
7459
7460 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7461 {
7462 Elf_Internal_Sym *locsyms = NULL;
7463 asection *toc = bfd_get_section_by_name (ibfd, ".toc");
7464 unsigned char *toc_ref = NULL;
7465
7466 /* Look at all the sections for this file. Make two passes over
7467 the relocs. On the first pass, mark toc entries involved
7468 with tls relocs, and check that tls relocs involved in
7469 setting up a tls_get_addr call are indeed followed by such a
7470 call. If they are not, exclude them from the optimizations
7471 done on the second pass. */
7472 for (pass = 0; pass < 2; ++pass)
7473 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7474 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
7475 {
7476 Elf_Internal_Rela *relstart, *rel, *relend;
7477
7478 /* Read the relocations. */
7479 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7480 info->keep_memory);
7481 if (relstart == NULL)
7482 return FALSE;
7483
7484 relend = relstart + sec->reloc_count;
7485 for (rel = relstart; rel < relend; rel++)
7486 {
7487 enum elf_ppc64_reloc_type r_type;
7488 unsigned long r_symndx;
7489 struct elf_link_hash_entry *h;
7490 Elf_Internal_Sym *sym;
7491 asection *sym_sec;
7492 unsigned char *tls_mask;
7493 unsigned char tls_set, tls_clear, tls_type = 0;
7494 bfd_vma value;
7495 bfd_boolean ok_tprel, is_local;
7496 long toc_ref_index = 0;
7497 int expecting_tls_get_addr = 0;
7498
7499 r_symndx = ELF64_R_SYM (rel->r_info);
7500 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
7501 r_symndx, ibfd))
7502 {
7503 err_free_rel:
7504 if (elf_section_data (sec)->relocs != relstart)
7505 free (relstart);
7506 if (toc_ref != NULL)
7507 free (toc_ref);
7508 if (locsyms != NULL
7509 && (elf_symtab_hdr (ibfd).contents
7510 != (unsigned char *) locsyms))
7511 free (locsyms);
7512 return FALSE;
7513 }
7514
7515 if (h != NULL)
7516 {
7517 if (h->root.type == bfd_link_hash_defined
7518 || h->root.type == bfd_link_hash_defweak)
7519 value = h->root.u.def.value;
7520 else if (h->root.type == bfd_link_hash_undefweak)
7521 value = 0;
7522 else
7523 continue;
7524 }
7525 else
7526 /* Symbols referenced by TLS relocs must be of type
7527 STT_TLS. So no need for .opd local sym adjust. */
7528 value = sym->st_value;
7529
7530 ok_tprel = FALSE;
7531 is_local = FALSE;
7532 if (h == NULL
7533 || !h->def_dynamic)
7534 {
7535 is_local = TRUE;
7536 if (h != NULL
7537 && h->root.type == bfd_link_hash_undefweak)
7538 ok_tprel = TRUE;
7539 else
7540 {
7541 value += sym_sec->output_offset;
7542 value += sym_sec->output_section->vma;
7543 value -= htab->elf.tls_sec->vma;
7544 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
7545 < (bfd_vma) 1 << 32);
7546 }
7547 }
7548
7549 r_type = ELF64_R_TYPE (rel->r_info);
7550 switch (r_type)
7551 {
7552 case R_PPC64_GOT_TLSLD16:
7553 case R_PPC64_GOT_TLSLD16_LO:
7554 expecting_tls_get_addr = 1;
7555 /* Fall thru */
7556
7557 case R_PPC64_GOT_TLSLD16_HI:
7558 case R_PPC64_GOT_TLSLD16_HA:
7559 /* These relocs should never be against a symbol
7560 defined in a shared lib. Leave them alone if
7561 that turns out to be the case. */
7562 if (!is_local)
7563 continue;
7564
7565 /* LD -> LE */
7566 tls_set = 0;
7567 tls_clear = TLS_LD;
7568 tls_type = TLS_TLS | TLS_LD;
7569 break;
7570
7571 case R_PPC64_GOT_TLSGD16:
7572 case R_PPC64_GOT_TLSGD16_LO:
7573 expecting_tls_get_addr = 1;
7574 /* Fall thru */
7575
7576 case R_PPC64_GOT_TLSGD16_HI:
7577 case R_PPC64_GOT_TLSGD16_HA:
7578 if (ok_tprel)
7579 /* GD -> LE */
7580 tls_set = 0;
7581 else
7582 /* GD -> IE */
7583 tls_set = TLS_TLS | TLS_TPRELGD;
7584 tls_clear = TLS_GD;
7585 tls_type = TLS_TLS | TLS_GD;
7586 break;
7587
7588 case R_PPC64_GOT_TPREL16_DS:
7589 case R_PPC64_GOT_TPREL16_LO_DS:
7590 case R_PPC64_GOT_TPREL16_HI:
7591 case R_PPC64_GOT_TPREL16_HA:
7592 if (ok_tprel)
7593 {
7594 /* IE -> LE */
7595 tls_set = 0;
7596 tls_clear = TLS_TPREL;
7597 tls_type = TLS_TLS | TLS_TPREL;
7598 break;
7599 }
7600 continue;
7601
7602 case R_PPC64_TOC16:
7603 case R_PPC64_TOC16_LO:
7604 case R_PPC64_TLS:
7605 case R_PPC64_TLSGD:
7606 case R_PPC64_TLSLD:
7607 if (sym_sec == NULL || sym_sec != toc)
7608 continue;
7609
7610 /* Mark this toc entry as referenced by a TLS
7611 code sequence. We can do that now in the
7612 case of R_PPC64_TLS, and after checking for
7613 tls_get_addr for the TOC16 relocs. */
7614 if (toc_ref == NULL)
7615 {
7616 toc_ref = bfd_zmalloc (toc->size / 8);
7617 if (toc_ref == NULL)
7618 goto err_free_rel;
7619 }
7620 if (h != NULL)
7621 value = h->root.u.def.value;
7622 else
7623 value = sym->st_value;
7624 value += rel->r_addend;
7625 BFD_ASSERT (value < toc->size && value % 8 == 0);
7626 toc_ref_index = value / 8;
7627 if (r_type == R_PPC64_TLS
7628 || r_type == R_PPC64_TLSGD
7629 || r_type == R_PPC64_TLSLD)
7630 {
7631 toc_ref[toc_ref_index] = 1;
7632 continue;
7633 }
7634
7635 if (pass != 0 && toc_ref[toc_ref_index] == 0)
7636 continue;
7637
7638 tls_set = 0;
7639 tls_clear = 0;
7640 expecting_tls_get_addr = 2;
7641 break;
7642
7643 case R_PPC64_TPREL64:
7644 if (pass == 0
7645 || sec != toc
7646 || toc_ref == NULL
7647 || !toc_ref[rel->r_offset / 8])
7648 continue;
7649 if (ok_tprel)
7650 {
7651 /* IE -> LE */
7652 tls_set = TLS_EXPLICIT;
7653 tls_clear = TLS_TPREL;
7654 break;
7655 }
7656 continue;
7657
7658 case R_PPC64_DTPMOD64:
7659 if (pass == 0
7660 || sec != toc
7661 || toc_ref == NULL
7662 || !toc_ref[rel->r_offset / 8])
7663 continue;
7664 if (rel + 1 < relend
7665 && (rel[1].r_info
7666 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
7667 && rel[1].r_offset == rel->r_offset + 8)
7668 {
7669 if (ok_tprel)
7670 /* GD -> LE */
7671 tls_set = TLS_EXPLICIT | TLS_GD;
7672 else
7673 /* GD -> IE */
7674 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
7675 tls_clear = TLS_GD;
7676 }
7677 else
7678 {
7679 if (!is_local)
7680 continue;
7681
7682 /* LD -> LE */
7683 tls_set = TLS_EXPLICIT;
7684 tls_clear = TLS_LD;
7685 }
7686 break;
7687
7688 default:
7689 continue;
7690 }
7691
7692 if (pass == 0)
7693 {
7694 if (!expecting_tls_get_addr
7695 || !sec->has_tls_get_addr_call)
7696 continue;
7697
7698 if (rel + 1 < relend
7699 && branch_reloc_hash_match (ibfd, rel + 1,
7700 htab->tls_get_addr,
7701 htab->tls_get_addr_fd))
7702 {
7703 if (expecting_tls_get_addr == 2)
7704 {
7705 /* Check for toc tls entries. */
7706 unsigned char *toc_tls;
7707 int retval;
7708
7709 retval = get_tls_mask (&toc_tls, NULL, NULL,
7710 &locsyms,
7711 rel, ibfd);
7712 if (retval == 0)
7713 goto err_free_rel;
7714 if (retval > 1 && toc_tls != NULL)
7715 toc_ref[toc_ref_index] = 1;
7716 }
7717 continue;
7718 }
7719
7720 if (expecting_tls_get_addr != 1)
7721 continue;
7722
7723 /* Uh oh, we didn't find the expected call. We
7724 could just mark this symbol to exclude it
7725 from tls optimization but it's safer to skip
7726 the entire section. */
7727 sec->has_tls_reloc = 0;
7728 break;
7729 }
7730
7731 if (expecting_tls_get_addr && htab->tls_get_addr != NULL)
7732 {
7733 struct plt_entry *ent;
7734 for (ent = htab->tls_get_addr->elf.plt.plist;
7735 ent != NULL;
7736 ent = ent->next)
7737 if (ent->addend == 0)
7738 {
7739 if (ent->plt.refcount > 0)
7740 {
7741 ent->plt.refcount -= 1;
7742 expecting_tls_get_addr = 0;
7743 }
7744 break;
7745 }
7746 }
7747
7748 if (expecting_tls_get_addr && htab->tls_get_addr_fd != NULL)
7749 {
7750 struct plt_entry *ent;
7751 for (ent = htab->tls_get_addr_fd->elf.plt.plist;
7752 ent != NULL;
7753 ent = ent->next)
7754 if (ent->addend == 0)
7755 {
7756 if (ent->plt.refcount > 0)
7757 ent->plt.refcount -= 1;
7758 break;
7759 }
7760 }
7761
7762 if (tls_clear == 0)
7763 continue;
7764
7765 if ((tls_set & TLS_EXPLICIT) == 0)
7766 {
7767 struct got_entry *ent;
7768
7769 /* Adjust got entry for this reloc. */
7770 if (h != NULL)
7771 ent = h->got.glist;
7772 else
7773 ent = elf_local_got_ents (ibfd)[r_symndx];
7774
7775 for (; ent != NULL; ent = ent->next)
7776 if (ent->addend == rel->r_addend
7777 && ent->owner == ibfd
7778 && ent->tls_type == tls_type)
7779 break;
7780 if (ent == NULL)
7781 abort ();
7782
7783 if (tls_set == 0)
7784 {
7785 /* We managed to get rid of a got entry. */
7786 if (ent->got.refcount > 0)
7787 ent->got.refcount -= 1;
7788 }
7789 }
7790 else
7791 {
7792 /* If we got rid of a DTPMOD/DTPREL reloc pair then
7793 we'll lose one or two dyn relocs. */
7794 if (!dec_dynrel_count (rel->r_info, sec, info,
7795 NULL, h, sym_sec))
7796 return FALSE;
7797
7798 if (tls_set == (TLS_EXPLICIT | TLS_GD))
7799 {
7800 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
7801 NULL, h, sym_sec))
7802 return FALSE;
7803 }
7804 }
7805
7806 *tls_mask |= tls_set;
7807 *tls_mask &= ~tls_clear;
7808 }
7809
7810 if (elf_section_data (sec)->relocs != relstart)
7811 free (relstart);
7812 }
7813
7814 if (toc_ref != NULL)
7815 free (toc_ref);
7816
7817 if (locsyms != NULL
7818 && (elf_symtab_hdr (ibfd).contents != (unsigned char *) locsyms))
7819 {
7820 if (!info->keep_memory)
7821 free (locsyms);
7822 else
7823 elf_symtab_hdr (ibfd).contents = (unsigned char *) locsyms;
7824 }
7825 }
7826 return TRUE;
7827 }
7828
7829 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
7830 the values of any global symbols in a toc section that has been
7831 edited. Globals in toc sections should be a rarity, so this function
7832 sets a flag if any are found in toc sections other than the one just
7833 edited, so that futher hash table traversals can be avoided. */
7834
7835 struct adjust_toc_info
7836 {
7837 asection *toc;
7838 unsigned long *skip;
7839 bfd_boolean global_toc_syms;
7840 };
7841
7842 enum toc_skip_enum { ref_from_discarded = 1, can_optimize = 2 };
7843
7844 static bfd_boolean
7845 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
7846 {
7847 struct ppc_link_hash_entry *eh;
7848 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
7849 unsigned long i;
7850
7851 if (h->root.type == bfd_link_hash_indirect)
7852 return TRUE;
7853
7854 if (h->root.type == bfd_link_hash_warning)
7855 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7856
7857 if (h->root.type != bfd_link_hash_defined
7858 && h->root.type != bfd_link_hash_defweak)
7859 return TRUE;
7860
7861 eh = (struct ppc_link_hash_entry *) h;
7862 if (eh->adjust_done)
7863 return TRUE;
7864
7865 if (eh->elf.root.u.def.section == toc_inf->toc)
7866 {
7867 if (eh->elf.root.u.def.value > toc_inf->toc->rawsize)
7868 i = toc_inf->toc->rawsize >> 3;
7869 else
7870 i = eh->elf.root.u.def.value >> 3;
7871
7872 if ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0)
7873 {
7874 (*_bfd_error_handler)
7875 (_("%s defined on removed toc entry"), eh->elf.root.root.string);
7876 do
7877 ++i;
7878 while ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0);
7879 eh->elf.root.u.def.value = (bfd_vma) i << 3;
7880 }
7881
7882 eh->elf.root.u.def.value -= toc_inf->skip[i];
7883 eh->adjust_done = 1;
7884 }
7885 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
7886 toc_inf->global_toc_syms = TRUE;
7887
7888 return TRUE;
7889 }
7890
7891 /* Examine all relocs referencing .toc sections in order to remove
7892 unused .toc entries. */
7893
7894 bfd_boolean
7895 ppc64_elf_edit_toc (struct bfd_link_info *info)
7896 {
7897 bfd *ibfd;
7898 struct adjust_toc_info toc_inf;
7899 struct ppc_link_hash_table *htab = ppc_hash_table (info);
7900
7901 htab->do_toc_opt = 1;
7902 toc_inf.global_toc_syms = TRUE;
7903 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7904 {
7905 asection *toc, *sec;
7906 Elf_Internal_Shdr *symtab_hdr;
7907 Elf_Internal_Sym *local_syms;
7908 Elf_Internal_Rela *relstart, *rel;
7909 unsigned long *skip, *drop;
7910 unsigned char *used;
7911 unsigned char *keep, last, some_unused;
7912
7913 if (!is_ppc64_elf (ibfd))
7914 continue;
7915
7916 toc = bfd_get_section_by_name (ibfd, ".toc");
7917 if (toc == NULL
7918 || toc->size == 0
7919 || toc->sec_info_type == ELF_INFO_TYPE_JUST_SYMS
7920 || elf_discarded_section (toc))
7921 continue;
7922
7923 local_syms = NULL;
7924 symtab_hdr = &elf_symtab_hdr (ibfd);
7925
7926 /* Look at sections dropped from the final link. */
7927 skip = NULL;
7928 relstart = NULL;
7929 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7930 {
7931 if (sec->reloc_count == 0
7932 || !elf_discarded_section (sec)
7933 || get_opd_info (sec)
7934 || (sec->flags & SEC_ALLOC) == 0
7935 || (sec->flags & SEC_DEBUGGING) != 0)
7936 continue;
7937
7938 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
7939 if (relstart == NULL)
7940 goto error_ret;
7941
7942 /* Run through the relocs to see which toc entries might be
7943 unused. */
7944 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
7945 {
7946 enum elf_ppc64_reloc_type r_type;
7947 unsigned long r_symndx;
7948 asection *sym_sec;
7949 struct elf_link_hash_entry *h;
7950 Elf_Internal_Sym *sym;
7951 bfd_vma val;
7952
7953 r_type = ELF64_R_TYPE (rel->r_info);
7954 switch (r_type)
7955 {
7956 default:
7957 continue;
7958
7959 case R_PPC64_TOC16:
7960 case R_PPC64_TOC16_LO:
7961 case R_PPC64_TOC16_HI:
7962 case R_PPC64_TOC16_HA:
7963 case R_PPC64_TOC16_DS:
7964 case R_PPC64_TOC16_LO_DS:
7965 break;
7966 }
7967
7968 r_symndx = ELF64_R_SYM (rel->r_info);
7969 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7970 r_symndx, ibfd))
7971 goto error_ret;
7972
7973 if (sym_sec != toc)
7974 continue;
7975
7976 if (h != NULL)
7977 val = h->root.u.def.value;
7978 else
7979 val = sym->st_value;
7980 val += rel->r_addend;
7981
7982 if (val >= toc->size)
7983 continue;
7984
7985 /* Anything in the toc ought to be aligned to 8 bytes.
7986 If not, don't mark as unused. */
7987 if (val & 7)
7988 continue;
7989
7990 if (skip == NULL)
7991 {
7992 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
7993 if (skip == NULL)
7994 goto error_ret;
7995 }
7996
7997 skip[val >> 3] = ref_from_discarded;
7998 }
7999
8000 if (elf_section_data (sec)->relocs != relstart)
8001 free (relstart);
8002 }
8003
8004 /* For largetoc loads of address constants, we can convert
8005 . addis rx,2,addr@got@ha
8006 . ld ry,addr@got@l(rx)
8007 to
8008 . addis rx,2,addr@toc@ha
8009 . addi ry,rx,addr@toc@l
8010 when addr is within 2G of the toc pointer. This then means
8011 that the word storing "addr" in the toc is no longer needed. */
8012
8013 if (!ppc64_elf_tdata (ibfd)->has_small_toc_reloc
8014 && toc->output_section->rawsize < (bfd_vma) 1 << 31
8015 && toc->reloc_count != 0)
8016 {
8017 /* Read toc relocs. */
8018 relstart = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
8019 info->keep_memory);
8020 if (relstart == NULL)
8021 goto error_ret;
8022
8023 for (rel = relstart; rel < relstart + toc->reloc_count; ++rel)
8024 {
8025 enum elf_ppc64_reloc_type r_type;
8026 unsigned long r_symndx;
8027 asection *sym_sec;
8028 struct elf_link_hash_entry *h;
8029 Elf_Internal_Sym *sym;
8030 bfd_vma val, addr;
8031
8032 r_type = ELF64_R_TYPE (rel->r_info);
8033 if (r_type != R_PPC64_ADDR64)
8034 continue;
8035
8036 r_symndx = ELF64_R_SYM (rel->r_info);
8037 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8038 r_symndx, ibfd))
8039 goto error_ret;
8040
8041 if (!SYMBOL_REFERENCES_LOCAL (info, h))
8042 continue;
8043
8044 if (h != NULL)
8045 val = h->root.u.def.value;
8046 else
8047 val = sym->st_value;
8048 val += rel->r_addend;
8049 val += sym_sec->output_section->vma + sym_sec->output_offset;
8050
8051 /* We don't yet know the exact toc pointer value, but we
8052 know it will be somewhere in the toc section. Don't
8053 optimize if the difference from any possible toc
8054 pointer is outside [ff..f80008000, 7fff7fff]. */
8055 addr = toc->output_section->vma + TOC_BASE_OFF;
8056 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
8057 continue;
8058
8059 addr = toc->output_section->vma + toc->output_section->rawsize;
8060 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
8061 continue;
8062
8063 if (skip == NULL)
8064 {
8065 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
8066 if (skip == NULL)
8067 goto error_ret;
8068 }
8069
8070 skip[rel->r_offset >> 3]
8071 |= can_optimize | ((rel - relstart) << 2);
8072 }
8073
8074 if (elf_section_data (toc)->relocs != relstart)
8075 free (relstart);
8076 }
8077
8078 if (skip == NULL)
8079 continue;
8080
8081 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
8082 if (used == NULL)
8083 {
8084 error_ret:
8085 if (local_syms != NULL
8086 && symtab_hdr->contents != (unsigned char *) local_syms)
8087 free (local_syms);
8088 if (sec != NULL
8089 && relstart != NULL
8090 && elf_section_data (sec)->relocs != relstart)
8091 free (relstart);
8092 if (skip != NULL)
8093 free (skip);
8094 return FALSE;
8095 }
8096
8097 /* Now check all kept sections that might reference the toc.
8098 Check the toc itself last. */
8099 for (sec = (ibfd->sections == toc && toc->next ? toc->next
8100 : ibfd->sections);
8101 sec != NULL;
8102 sec = (sec == toc ? NULL
8103 : sec->next == NULL ? toc
8104 : sec->next == toc && toc->next ? toc->next
8105 : sec->next))
8106 {
8107 int repeat;
8108
8109 if (sec->reloc_count == 0
8110 || elf_discarded_section (sec)
8111 || get_opd_info (sec)
8112 || (sec->flags & SEC_ALLOC) == 0
8113 || (sec->flags & SEC_DEBUGGING) != 0)
8114 continue;
8115
8116 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8117 info->keep_memory);
8118 if (relstart == NULL)
8119 goto error_ret;
8120
8121 /* Mark toc entries referenced as used. */
8122 repeat = 0;
8123 do
8124 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8125 {
8126 enum elf_ppc64_reloc_type r_type;
8127 unsigned long r_symndx;
8128 asection *sym_sec;
8129 struct elf_link_hash_entry *h;
8130 Elf_Internal_Sym *sym;
8131 bfd_vma val;
8132
8133 r_type = ELF64_R_TYPE (rel->r_info);
8134 switch (r_type)
8135 {
8136 case R_PPC64_TOC16:
8137 case R_PPC64_TOC16_LO:
8138 case R_PPC64_TOC16_HI:
8139 case R_PPC64_TOC16_HA:
8140 case R_PPC64_TOC16_DS:
8141 case R_PPC64_TOC16_LO_DS:
8142 /* In case we're taking addresses of toc entries. */
8143 case R_PPC64_ADDR64:
8144 break;
8145
8146 default:
8147 continue;
8148 }
8149
8150 r_symndx = ELF64_R_SYM (rel->r_info);
8151 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8152 r_symndx, ibfd))
8153 {
8154 free (used);
8155 goto error_ret;
8156 }
8157
8158 if (sym_sec != toc)
8159 continue;
8160
8161 if (h != NULL)
8162 val = h->root.u.def.value;
8163 else
8164 val = sym->st_value;
8165 val += rel->r_addend;
8166
8167 if (val >= toc->size)
8168 continue;
8169
8170 if ((skip[val >> 3] & can_optimize) != 0)
8171 {
8172 bfd_vma off;
8173 unsigned char opc;
8174
8175 switch (r_type)
8176 {
8177 case R_PPC64_TOC16_HA:
8178 break;
8179
8180 case R_PPC64_TOC16_LO_DS:
8181 off = rel->r_offset + (bfd_big_endian (ibfd) ? -2 : 3);
8182 if (!bfd_get_section_contents (ibfd, sec, &opc, off, 1))
8183 return FALSE;
8184 if ((opc & (0x3f << 2)) == (58u << 2))
8185 break;
8186 /* Fall thru */
8187
8188 default:
8189 /* Wrong sort of reloc, or not a ld. We may
8190 as well clear ref_from_discarded too. */
8191 skip[val >> 3] = 0;
8192 }
8193 }
8194
8195 /* For the toc section, we only mark as used if
8196 this entry itself isn't unused. */
8197 if (sec == toc
8198 && !used[val >> 3]
8199 && (used[rel->r_offset >> 3]
8200 || !(skip[rel->r_offset >> 3] & ref_from_discarded)))
8201 /* Do all the relocs again, to catch reference
8202 chains. */
8203 repeat = 1;
8204
8205 used[val >> 3] = 1;
8206 }
8207 while (repeat);
8208
8209 if (elf_section_data (sec)->relocs != relstart)
8210 free (relstart);
8211 }
8212
8213 /* Merge the used and skip arrays. Assume that TOC
8214 doublewords not appearing as either used or unused belong
8215 to to an entry more than one doubleword in size. */
8216 for (drop = skip, keep = used, last = 0, some_unused = 0;
8217 drop < skip + (toc->size + 7) / 8;
8218 ++drop, ++keep)
8219 {
8220 if (*keep)
8221 {
8222 *drop &= ~ref_from_discarded;
8223 if ((*drop & can_optimize) != 0)
8224 some_unused = 1;
8225 last = 0;
8226 }
8227 else if (*drop)
8228 {
8229 some_unused = 1;
8230 last = ref_from_discarded;
8231 }
8232 else
8233 *drop = last;
8234 }
8235
8236 free (used);
8237
8238 if (some_unused)
8239 {
8240 bfd_byte *contents, *src;
8241 unsigned long off;
8242 bfd_boolean local_toc_syms = FALSE;
8243
8244 /* Shuffle the toc contents, and at the same time convert the
8245 skip array from booleans into offsets. */
8246 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
8247 goto error_ret;
8248
8249 elf_section_data (toc)->this_hdr.contents = contents;
8250
8251 for (src = contents, off = 0, drop = skip;
8252 src < contents + toc->size;
8253 src += 8, ++drop)
8254 {
8255 if ((*drop & (can_optimize | ref_from_discarded)) != 0)
8256 off += 8;
8257 else if (off != 0)
8258 {
8259 *drop = off;
8260 memcpy (src - off, src, 8);
8261 }
8262 }
8263 *drop = off;
8264 toc->rawsize = toc->size;
8265 toc->size = src - contents - off;
8266
8267 /* Adjust addends for relocs against the toc section sym,
8268 and optimize any accesses we can. */
8269 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8270 {
8271 if (sec->reloc_count == 0
8272 || elf_discarded_section (sec))
8273 continue;
8274
8275 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8276 info->keep_memory);
8277 if (relstart == NULL)
8278 goto error_ret;
8279
8280 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8281 {
8282 enum elf_ppc64_reloc_type r_type;
8283 unsigned long r_symndx;
8284 asection *sym_sec;
8285 struct elf_link_hash_entry *h;
8286 Elf_Internal_Sym *sym;
8287 bfd_vma val;
8288
8289 r_type = ELF64_R_TYPE (rel->r_info);
8290 switch (r_type)
8291 {
8292 default:
8293 continue;
8294
8295 case R_PPC64_TOC16:
8296 case R_PPC64_TOC16_LO:
8297 case R_PPC64_TOC16_HI:
8298 case R_PPC64_TOC16_HA:
8299 case R_PPC64_TOC16_DS:
8300 case R_PPC64_TOC16_LO_DS:
8301 case R_PPC64_ADDR64:
8302 break;
8303 }
8304
8305 r_symndx = ELF64_R_SYM (rel->r_info);
8306 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8307 r_symndx, ibfd))
8308 goto error_ret;
8309
8310 if (sym_sec != toc)
8311 continue;
8312
8313 if (h != NULL)
8314 val = h->root.u.def.value;
8315 else
8316 {
8317 val = sym->st_value;
8318 if (val != 0)
8319 local_toc_syms = TRUE;
8320 }
8321
8322 val += rel->r_addend;
8323
8324 if (val > toc->rawsize)
8325 val = toc->rawsize;
8326 else if ((skip[val >> 3] & ref_from_discarded) != 0)
8327 continue;
8328 else if ((skip[val >> 3] & can_optimize) != 0)
8329 {
8330 Elf_Internal_Rela *tocrel
8331 = elf_section_data (toc)->relocs + (skip[val >> 3] >> 2);
8332 unsigned long tsym = ELF64_R_SYM (tocrel->r_info);
8333
8334 switch (r_type)
8335 {
8336 case R_PPC64_TOC16_HA:
8337 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_TOC16_HA);
8338 break;
8339
8340 case R_PPC64_TOC16_LO_DS:
8341 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_LO_DS_OPT);
8342 break;
8343
8344 default:
8345 abort ();
8346 }
8347 rel->r_addend = tocrel->r_addend;
8348 elf_section_data (sec)->relocs = relstart;
8349 continue;
8350 }
8351
8352 if (h != NULL || sym->st_value != 0)
8353 continue;
8354
8355 rel->r_addend -= skip[val >> 3];
8356 elf_section_data (sec)->relocs = relstart;
8357 }
8358
8359 if (elf_section_data (sec)->relocs != relstart)
8360 free (relstart);
8361 }
8362
8363 /* We shouldn't have local or global symbols defined in the TOC,
8364 but handle them anyway. */
8365 if (local_toc_syms)
8366 {
8367 Elf_Internal_Sym *sym;
8368
8369 for (sym = local_syms;
8370 sym < local_syms + symtab_hdr->sh_info;
8371 ++sym)
8372 if (sym->st_value != 0
8373 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
8374 {
8375 unsigned long i;
8376
8377 if (sym->st_value > toc->rawsize)
8378 i = toc->rawsize >> 3;
8379 else
8380 i = sym->st_value >> 3;
8381
8382 if ((skip[i] & (ref_from_discarded | can_optimize)) != 0)
8383 {
8384 (*_bfd_error_handler)
8385 (_("%s defined on removed toc entry"),
8386 bfd_elf_sym_name (ibfd, symtab_hdr, sym, NULL));
8387 do
8388 ++i;
8389 while ((skip[i] & (ref_from_discarded | can_optimize)));
8390 sym->st_value = (bfd_vma) i << 3;
8391 }
8392
8393 sym->st_value -= skip[i];
8394 symtab_hdr->contents = (unsigned char *) local_syms;
8395 }
8396 }
8397
8398 /* Adjust any global syms defined in this toc input section. */
8399 if (toc_inf.global_toc_syms)
8400 {
8401 toc_inf.toc = toc;
8402 toc_inf.skip = skip;
8403 toc_inf.global_toc_syms = FALSE;
8404 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
8405 &toc_inf);
8406 }
8407
8408 if (toc->reloc_count != 0)
8409 {
8410 Elf_Internal_Rela *wrel;
8411 bfd_size_type sz;
8412
8413 /* Read toc relocs. */
8414 relstart = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
8415 TRUE);
8416 if (relstart == NULL)
8417 goto error_ret;
8418
8419 /* Remove unused toc relocs, and adjust those we keep. */
8420 wrel = relstart;
8421 for (rel = relstart; rel < relstart + toc->reloc_count; ++rel)
8422 if ((skip[rel->r_offset >> 3]
8423 & (ref_from_discarded | can_optimize)) == 0)
8424 {
8425 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
8426 wrel->r_info = rel->r_info;
8427 wrel->r_addend = rel->r_addend;
8428 ++wrel;
8429 }
8430 else if (!dec_dynrel_count (rel->r_info, toc, info,
8431 &local_syms, NULL, NULL))
8432 goto error_ret;
8433
8434 toc->reloc_count = wrel - relstart;
8435 sz = elf_section_data (toc)->rel_hdr.sh_entsize;
8436 elf_section_data (toc)->rel_hdr.sh_size = toc->reloc_count * sz;
8437 BFD_ASSERT (elf_section_data (toc)->rel_hdr2 == NULL);
8438 }
8439 }
8440
8441 if (local_syms != NULL
8442 && symtab_hdr->contents != (unsigned char *) local_syms)
8443 {
8444 if (!info->keep_memory)
8445 free (local_syms);
8446 else
8447 symtab_hdr->contents = (unsigned char *) local_syms;
8448 }
8449 free (skip);
8450 }
8451
8452 return TRUE;
8453 }
8454
8455 /* Return true iff input section I references the TOC using
8456 instructions limited to +/-32k offsets. */
8457
8458 bfd_boolean
8459 ppc64_elf_has_small_toc_reloc (asection *i)
8460 {
8461 return (is_ppc64_elf (i->owner)
8462 && ppc64_elf_tdata (i->owner)->has_small_toc_reloc);
8463 }
8464
8465 /* Allocate space for one GOT entry. */
8466
8467 static void
8468 allocate_got (struct elf_link_hash_entry *h,
8469 struct bfd_link_info *info,
8470 struct got_entry *gent)
8471 {
8472 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8473 bfd_boolean dyn;
8474 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
8475 int entsize = (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)
8476 ? 16 : 8);
8477 int rentsize = (gent->tls_type & eh->tls_mask & TLS_GD
8478 ? 2 : 1) * sizeof (Elf64_External_Rela);
8479 asection *got = ppc64_elf_tdata (gent->owner)->got;
8480
8481 gent->got.offset = got->size;
8482 got->size += entsize;
8483
8484 dyn = htab->elf.dynamic_sections_created;
8485 if ((info->shared
8486 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
8487 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
8488 || h->root.type != bfd_link_hash_undefweak))
8489 {
8490 asection *relgot = ppc64_elf_tdata (gent->owner)->relgot;
8491 relgot->size += rentsize;
8492 }
8493 else if (h->type == STT_GNU_IFUNC)
8494 {
8495 asection *relgot = htab->reliplt;
8496 relgot->size += rentsize;
8497 htab->got_reli_size += rentsize;
8498 }
8499 }
8500
8501 /* This function merges got entries in the same toc group. */
8502
8503 static void
8504 merge_got_entries (struct got_entry **pent)
8505 {
8506 struct got_entry *ent, *ent2;
8507
8508 for (ent = *pent; ent != NULL; ent = ent->next)
8509 if (!ent->is_indirect)
8510 for (ent2 = ent->next; ent2 != NULL; ent2 = ent2->next)
8511 if (!ent2->is_indirect
8512 && ent2->addend == ent->addend
8513 && ent2->tls_type == ent->tls_type
8514 && elf_gp (ent2->owner) == elf_gp (ent->owner))
8515 {
8516 ent2->is_indirect = TRUE;
8517 ent2->got.ent = ent;
8518 }
8519 }
8520
8521 /* Allocate space in .plt, .got and associated reloc sections for
8522 dynamic relocs. */
8523
8524 static bfd_boolean
8525 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
8526 {
8527 struct bfd_link_info *info;
8528 struct ppc_link_hash_table *htab;
8529 asection *s;
8530 struct ppc_link_hash_entry *eh;
8531 struct ppc_dyn_relocs *p;
8532 struct got_entry **pgent, *gent;
8533
8534 if (h->root.type == bfd_link_hash_indirect)
8535 return TRUE;
8536
8537 if (h->root.type == bfd_link_hash_warning)
8538 h = (struct elf_link_hash_entry *) h->root.u.i.link;
8539
8540 info = (struct bfd_link_info *) inf;
8541 htab = ppc_hash_table (info);
8542 if (htab == NULL)
8543 return FALSE;
8544
8545 if ((htab->elf.dynamic_sections_created
8546 && h->dynindx != -1
8547 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h))
8548 || h->type == STT_GNU_IFUNC)
8549 {
8550 struct plt_entry *pent;
8551 bfd_boolean doneone = FALSE;
8552 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
8553 if (pent->plt.refcount > 0)
8554 {
8555 if (!htab->elf.dynamic_sections_created
8556 || h->dynindx == -1)
8557 {
8558 s = htab->iplt;
8559 pent->plt.offset = s->size;
8560 s->size += PLT_ENTRY_SIZE;
8561 s = htab->reliplt;
8562 }
8563 else
8564 {
8565 /* If this is the first .plt entry, make room for the special
8566 first entry. */
8567 s = htab->plt;
8568 if (s->size == 0)
8569 s->size += PLT_INITIAL_ENTRY_SIZE;
8570
8571 pent->plt.offset = s->size;
8572
8573 /* Make room for this entry. */
8574 s->size += PLT_ENTRY_SIZE;
8575
8576 /* Make room for the .glink code. */
8577 s = htab->glink;
8578 if (s->size == 0)
8579 s->size += GLINK_CALL_STUB_SIZE;
8580 /* We need bigger stubs past index 32767. */
8581 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
8582 s->size += 4;
8583 s->size += 2*4;
8584
8585 /* We also need to make an entry in the .rela.plt section. */
8586 s = htab->relplt;
8587 }
8588 s->size += sizeof (Elf64_External_Rela);
8589 doneone = TRUE;
8590 }
8591 else
8592 pent->plt.offset = (bfd_vma) -1;
8593 if (!doneone)
8594 {
8595 h->plt.plist = NULL;
8596 h->needs_plt = 0;
8597 }
8598 }
8599 else
8600 {
8601 h->plt.plist = NULL;
8602 h->needs_plt = 0;
8603 }
8604
8605 eh = (struct ppc_link_hash_entry *) h;
8606 /* Run through the TLS GD got entries first if we're changing them
8607 to TPREL. */
8608 if ((eh->tls_mask & TLS_TPRELGD) != 0)
8609 for (gent = h->got.glist; gent != NULL; gent = gent->next)
8610 if (gent->got.refcount > 0
8611 && (gent->tls_type & TLS_GD) != 0)
8612 {
8613 /* This was a GD entry that has been converted to TPREL. If
8614 there happens to be a TPREL entry we can use that one. */
8615 struct got_entry *ent;
8616 for (ent = h->got.glist; ent != NULL; ent = ent->next)
8617 if (ent->got.refcount > 0
8618 && (ent->tls_type & TLS_TPREL) != 0
8619 && ent->addend == gent->addend
8620 && ent->owner == gent->owner)
8621 {
8622 gent->got.refcount = 0;
8623 break;
8624 }
8625
8626 /* If not, then we'll be using our own TPREL entry. */
8627 if (gent->got.refcount != 0)
8628 gent->tls_type = TLS_TLS | TLS_TPREL;
8629 }
8630
8631 /* Remove any list entry that won't generate a word in the GOT before
8632 we call merge_got_entries. Otherwise we risk merging to empty
8633 entries. */
8634 pgent = &h->got.glist;
8635 while ((gent = *pgent) != NULL)
8636 if (gent->got.refcount > 0)
8637 {
8638 if ((gent->tls_type & TLS_LD) != 0
8639 && !h->def_dynamic)
8640 {
8641 ppc64_tlsld_got (gent->owner)->got.refcount += 1;
8642 *pgent = gent->next;
8643 }
8644 else
8645 pgent = &gent->next;
8646 }
8647 else
8648 *pgent = gent->next;
8649
8650 if (!htab->do_multi_toc)
8651 merge_got_entries (&h->got.glist);
8652
8653 for (gent = h->got.glist; gent != NULL; gent = gent->next)
8654 if (!gent->is_indirect)
8655 {
8656 /* Make sure this symbol is output as a dynamic symbol.
8657 Undefined weak syms won't yet be marked as dynamic,
8658 nor will all TLS symbols. */
8659 if (h->dynindx == -1
8660 && !h->forced_local
8661 && h->type != STT_GNU_IFUNC
8662 && htab->elf.dynamic_sections_created)
8663 {
8664 if (! bfd_elf_link_record_dynamic_symbol (info, h))
8665 return FALSE;
8666 }
8667
8668 if (!is_ppc64_elf (gent->owner))
8669 abort ();
8670
8671 allocate_got (h, info, gent);
8672 }
8673
8674 if (eh->dyn_relocs == NULL
8675 || (!htab->elf.dynamic_sections_created
8676 && h->type != STT_GNU_IFUNC))
8677 return TRUE;
8678
8679 /* In the shared -Bsymbolic case, discard space allocated for
8680 dynamic pc-relative relocs against symbols which turn out to be
8681 defined in regular objects. For the normal shared case, discard
8682 space for relocs that have become local due to symbol visibility
8683 changes. */
8684
8685 if (info->shared)
8686 {
8687 /* Relocs that use pc_count are those that appear on a call insn,
8688 or certain REL relocs (see must_be_dyn_reloc) that can be
8689 generated via assembly. We want calls to protected symbols to
8690 resolve directly to the function rather than going via the plt.
8691 If people want function pointer comparisons to work as expected
8692 then they should avoid writing weird assembly. */
8693 if (SYMBOL_CALLS_LOCAL (info, h))
8694 {
8695 struct ppc_dyn_relocs **pp;
8696
8697 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
8698 {
8699 p->count -= p->pc_count;
8700 p->pc_count = 0;
8701 if (p->count == 0)
8702 *pp = p->next;
8703 else
8704 pp = &p->next;
8705 }
8706 }
8707
8708 /* Also discard relocs on undefined weak syms with non-default
8709 visibility. */
8710 if (eh->dyn_relocs != NULL
8711 && h->root.type == bfd_link_hash_undefweak)
8712 {
8713 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
8714 eh->dyn_relocs = NULL;
8715
8716 /* Make sure this symbol is output as a dynamic symbol.
8717 Undefined weak syms won't yet be marked as dynamic. */
8718 else if (h->dynindx == -1
8719 && !h->forced_local)
8720 {
8721 if (! bfd_elf_link_record_dynamic_symbol (info, h))
8722 return FALSE;
8723 }
8724 }
8725 }
8726 else if (h->type == STT_GNU_IFUNC)
8727 {
8728 if (!h->non_got_ref)
8729 eh->dyn_relocs = NULL;
8730 }
8731 else if (ELIMINATE_COPY_RELOCS)
8732 {
8733 /* For the non-shared case, discard space for relocs against
8734 symbols which turn out to need copy relocs or are not
8735 dynamic. */
8736
8737 if (!h->non_got_ref
8738 && !h->def_regular)
8739 {
8740 /* Make sure this symbol is output as a dynamic symbol.
8741 Undefined weak syms won't yet be marked as dynamic. */
8742 if (h->dynindx == -1
8743 && !h->forced_local)
8744 {
8745 if (! bfd_elf_link_record_dynamic_symbol (info, h))
8746 return FALSE;
8747 }
8748
8749 /* If that succeeded, we know we'll be keeping all the
8750 relocs. */
8751 if (h->dynindx != -1)
8752 goto keep;
8753 }
8754
8755 eh->dyn_relocs = NULL;
8756
8757 keep: ;
8758 }
8759
8760 /* Finally, allocate space. */
8761 for (p = eh->dyn_relocs; p != NULL; p = p->next)
8762 {
8763 asection *sreloc = elf_section_data (p->sec)->sreloc;
8764 if (!htab->elf.dynamic_sections_created)
8765 sreloc = htab->reliplt;
8766 sreloc->size += p->count * sizeof (Elf64_External_Rela);
8767 }
8768
8769 return TRUE;
8770 }
8771
8772 /* Find any dynamic relocs that apply to read-only sections. */
8773
8774 static bfd_boolean
8775 readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
8776 {
8777 struct ppc_link_hash_entry *eh;
8778 struct ppc_dyn_relocs *p;
8779
8780 if (h->root.type == bfd_link_hash_warning)
8781 h = (struct elf_link_hash_entry *) h->root.u.i.link;
8782
8783 eh = (struct ppc_link_hash_entry *) h;
8784 for (p = eh->dyn_relocs; p != NULL; p = p->next)
8785 {
8786 asection *s = p->sec->output_section;
8787
8788 if (s != NULL && (s->flags & SEC_READONLY) != 0)
8789 {
8790 struct bfd_link_info *info = inf;
8791
8792 info->flags |= DF_TEXTREL;
8793
8794 /* Not an error, just cut short the traversal. */
8795 return FALSE;
8796 }
8797 }
8798 return TRUE;
8799 }
8800
8801 /* Set the sizes of the dynamic sections. */
8802
8803 static bfd_boolean
8804 ppc64_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
8805 struct bfd_link_info *info)
8806 {
8807 struct ppc_link_hash_table *htab;
8808 bfd *dynobj;
8809 asection *s;
8810 bfd_boolean relocs;
8811 bfd *ibfd;
8812 struct got_entry *first_tlsld;
8813
8814 htab = ppc_hash_table (info);
8815 if (htab == NULL)
8816 return FALSE;
8817
8818 dynobj = htab->elf.dynobj;
8819 if (dynobj == NULL)
8820 abort ();
8821
8822 if (htab->elf.dynamic_sections_created)
8823 {
8824 /* Set the contents of the .interp section to the interpreter. */
8825 if (info->executable)
8826 {
8827 s = bfd_get_section_by_name (dynobj, ".interp");
8828 if (s == NULL)
8829 abort ();
8830 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
8831 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
8832 }
8833 }
8834
8835 /* Set up .got offsets for local syms, and space for local dynamic
8836 relocs. */
8837 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8838 {
8839 struct got_entry **lgot_ents;
8840 struct got_entry **end_lgot_ents;
8841 struct plt_entry **local_plt;
8842 struct plt_entry **end_local_plt;
8843 unsigned char *lgot_masks;
8844 bfd_size_type locsymcount;
8845 Elf_Internal_Shdr *symtab_hdr;
8846 asection *srel;
8847
8848 if (!is_ppc64_elf (ibfd))
8849 continue;
8850
8851 for (s = ibfd->sections; s != NULL; s = s->next)
8852 {
8853 struct ppc_dyn_relocs *p;
8854
8855 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
8856 {
8857 if (!bfd_is_abs_section (p->sec)
8858 && bfd_is_abs_section (p->sec->output_section))
8859 {
8860 /* Input section has been discarded, either because
8861 it is a copy of a linkonce section or due to
8862 linker script /DISCARD/, so we'll be discarding
8863 the relocs too. */
8864 }
8865 else if (p->count != 0)
8866 {
8867 srel = elf_section_data (p->sec)->sreloc;
8868 if (!htab->elf.dynamic_sections_created)
8869 srel = htab->reliplt;
8870 srel->size += p->count * sizeof (Elf64_External_Rela);
8871 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
8872 info->flags |= DF_TEXTREL;
8873 }
8874 }
8875 }
8876
8877 lgot_ents = elf_local_got_ents (ibfd);
8878 if (!lgot_ents)
8879 continue;
8880
8881 symtab_hdr = &elf_symtab_hdr (ibfd);
8882 locsymcount = symtab_hdr->sh_info;
8883 end_lgot_ents = lgot_ents + locsymcount;
8884 local_plt = (struct plt_entry **) end_lgot_ents;
8885 end_local_plt = local_plt + locsymcount;
8886 lgot_masks = (unsigned char *) end_local_plt;
8887 s = ppc64_elf_tdata (ibfd)->got;
8888 srel = ppc64_elf_tdata (ibfd)->relgot;
8889 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
8890 {
8891 struct got_entry **pent, *ent;
8892
8893 pent = lgot_ents;
8894 while ((ent = *pent) != NULL)
8895 if (ent->got.refcount > 0)
8896 {
8897 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
8898 {
8899 ppc64_tlsld_got (ibfd)->got.refcount += 1;
8900 *pent = ent->next;
8901 }
8902 else
8903 {
8904 unsigned int num = 1;
8905 ent->got.offset = s->size;
8906 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
8907 num = 2;
8908 s->size += num * 8;
8909 if (info->shared)
8910 srel->size += num * sizeof (Elf64_External_Rela);
8911 else if ((*lgot_masks & PLT_IFUNC) != 0)
8912 {
8913 htab->reliplt->size
8914 += num * sizeof (Elf64_External_Rela);
8915 htab->got_reli_size
8916 += num * sizeof (Elf64_External_Rela);
8917 }
8918 pent = &ent->next;
8919 }
8920 }
8921 else
8922 *pent = ent->next;
8923 }
8924
8925 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
8926 for (; local_plt < end_local_plt; ++local_plt)
8927 {
8928 struct plt_entry *ent;
8929
8930 for (ent = *local_plt; ent != NULL; ent = ent->next)
8931 if (ent->plt.refcount > 0)
8932 {
8933 s = htab->iplt;
8934 ent->plt.offset = s->size;
8935 s->size += PLT_ENTRY_SIZE;
8936
8937 htab->reliplt->size += sizeof (Elf64_External_Rela);
8938 }
8939 else
8940 ent->plt.offset = (bfd_vma) -1;
8941 }
8942 }
8943
8944 /* Allocate global sym .plt and .got entries, and space for global
8945 sym dynamic relocs. */
8946 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
8947
8948 first_tlsld = NULL;
8949 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8950 {
8951 struct got_entry *ent;
8952
8953 if (!is_ppc64_elf (ibfd))
8954 continue;
8955
8956 ent = ppc64_tlsld_got (ibfd);
8957 if (ent->got.refcount > 0)
8958 {
8959 if (!htab->do_multi_toc && first_tlsld != NULL)
8960 {
8961 ent->is_indirect = TRUE;
8962 ent->got.ent = first_tlsld;
8963 }
8964 else
8965 {
8966 if (first_tlsld == NULL)
8967 first_tlsld = ent;
8968 s = ppc64_elf_tdata (ibfd)->got;
8969 ent->got.offset = s->size;
8970 ent->owner = ibfd;
8971 s->size += 16;
8972 if (info->shared)
8973 {
8974 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
8975 srel->size += sizeof (Elf64_External_Rela);
8976 }
8977 }
8978 }
8979 else
8980 ent->got.offset = (bfd_vma) -1;
8981 }
8982
8983 /* We now have determined the sizes of the various dynamic sections.
8984 Allocate memory for them. */
8985 relocs = FALSE;
8986 for (s = dynobj->sections; s != NULL; s = s->next)
8987 {
8988 if ((s->flags & SEC_LINKER_CREATED) == 0)
8989 continue;
8990
8991 if (s == htab->brlt || s == htab->relbrlt)
8992 /* These haven't been allocated yet; don't strip. */
8993 continue;
8994 else if (s == htab->got
8995 || s == htab->plt
8996 || s == htab->iplt
8997 || s == htab->glink
8998 || s == htab->dynbss)
8999 {
9000 /* Strip this section if we don't need it; see the
9001 comment below. */
9002 }
9003 else if (CONST_STRNEQ (s->name, ".rela"))
9004 {
9005 if (s->size != 0)
9006 {
9007 if (s != htab->relplt)
9008 relocs = TRUE;
9009
9010 /* We use the reloc_count field as a counter if we need
9011 to copy relocs into the output file. */
9012 s->reloc_count = 0;
9013 }
9014 }
9015 else
9016 {
9017 /* It's not one of our sections, so don't allocate space. */
9018 continue;
9019 }
9020
9021 if (s->size == 0)
9022 {
9023 /* If we don't need this section, strip it from the
9024 output file. This is mostly to handle .rela.bss and
9025 .rela.plt. We must create both sections in
9026 create_dynamic_sections, because they must be created
9027 before the linker maps input sections to output
9028 sections. The linker does that before
9029 adjust_dynamic_symbol is called, and it is that
9030 function which decides whether anything needs to go
9031 into these sections. */
9032 s->flags |= SEC_EXCLUDE;
9033 continue;
9034 }
9035
9036 if ((s->flags & SEC_HAS_CONTENTS) == 0)
9037 continue;
9038
9039 /* Allocate memory for the section contents. We use bfd_zalloc
9040 here in case unused entries are not reclaimed before the
9041 section's contents are written out. This should not happen,
9042 but this way if it does we get a R_PPC64_NONE reloc in .rela
9043 sections instead of garbage.
9044 We also rely on the section contents being zero when writing
9045 the GOT. */
9046 s->contents = bfd_zalloc (dynobj, s->size);
9047 if (s->contents == NULL)
9048 return FALSE;
9049 }
9050
9051 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
9052 {
9053 if (!is_ppc64_elf (ibfd))
9054 continue;
9055
9056 s = ppc64_elf_tdata (ibfd)->got;
9057 if (s != NULL && s != htab->got)
9058 {
9059 if (s->size == 0)
9060 s->flags |= SEC_EXCLUDE;
9061 else
9062 {
9063 s->contents = bfd_zalloc (ibfd, s->size);
9064 if (s->contents == NULL)
9065 return FALSE;
9066 }
9067 }
9068 s = ppc64_elf_tdata (ibfd)->relgot;
9069 if (s != NULL)
9070 {
9071 if (s->size == 0)
9072 s->flags |= SEC_EXCLUDE;
9073 else
9074 {
9075 s->contents = bfd_zalloc (ibfd, s->size);
9076 if (s->contents == NULL)
9077 return FALSE;
9078 relocs = TRUE;
9079 s->reloc_count = 0;
9080 }
9081 }
9082 }
9083
9084 if (htab->elf.dynamic_sections_created)
9085 {
9086 /* Add some entries to the .dynamic section. We fill in the
9087 values later, in ppc64_elf_finish_dynamic_sections, but we
9088 must add the entries now so that we get the correct size for
9089 the .dynamic section. The DT_DEBUG entry is filled in by the
9090 dynamic linker and used by the debugger. */
9091 #define add_dynamic_entry(TAG, VAL) \
9092 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
9093
9094 if (info->executable)
9095 {
9096 if (!add_dynamic_entry (DT_DEBUG, 0))
9097 return FALSE;
9098 }
9099
9100 if (htab->plt != NULL && htab->plt->size != 0)
9101 {
9102 if (!add_dynamic_entry (DT_PLTGOT, 0)
9103 || !add_dynamic_entry (DT_PLTRELSZ, 0)
9104 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
9105 || !add_dynamic_entry (DT_JMPREL, 0)
9106 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
9107 return FALSE;
9108 }
9109
9110 if (NO_OPD_RELOCS)
9111 {
9112 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
9113 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
9114 return FALSE;
9115 }
9116
9117 if (!htab->no_tls_get_addr_opt
9118 && htab->tls_get_addr_fd != NULL
9119 && htab->tls_get_addr_fd->elf.plt.plist != NULL
9120 && !add_dynamic_entry (DT_PPC64_TLSOPT, 0))
9121 return FALSE;
9122
9123 if (relocs)
9124 {
9125 if (!add_dynamic_entry (DT_RELA, 0)
9126 || !add_dynamic_entry (DT_RELASZ, 0)
9127 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
9128 return FALSE;
9129
9130 /* If any dynamic relocs apply to a read-only section,
9131 then we need a DT_TEXTREL entry. */
9132 if ((info->flags & DF_TEXTREL) == 0)
9133 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info);
9134
9135 if ((info->flags & DF_TEXTREL) != 0)
9136 {
9137 if (!add_dynamic_entry (DT_TEXTREL, 0))
9138 return FALSE;
9139 }
9140 }
9141 }
9142 #undef add_dynamic_entry
9143
9144 return TRUE;
9145 }
9146
9147 /* Determine the type of stub needed, if any, for a call. */
9148
9149 static inline enum ppc_stub_type
9150 ppc_type_of_stub (asection *input_sec,
9151 const Elf_Internal_Rela *rel,
9152 struct ppc_link_hash_entry **hash,
9153 struct plt_entry **plt_ent,
9154 bfd_vma destination)
9155 {
9156 struct ppc_link_hash_entry *h = *hash;
9157 bfd_vma location;
9158 bfd_vma branch_offset;
9159 bfd_vma max_branch_offset;
9160 enum elf_ppc64_reloc_type r_type;
9161
9162 if (h != NULL)
9163 {
9164 struct plt_entry *ent;
9165 struct ppc_link_hash_entry *fdh = h;
9166 if (h->oh != NULL
9167 && h->oh->is_func_descriptor)
9168 {
9169 fdh = ppc_follow_link (h->oh);
9170 *hash = fdh;
9171 }
9172
9173 for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next)
9174 if (ent->addend == rel->r_addend
9175 && ent->plt.offset != (bfd_vma) -1)
9176 {
9177 *plt_ent = ent;
9178 return ppc_stub_plt_call;
9179 }
9180
9181 /* Here, we know we don't have a plt entry. If we don't have a
9182 either a defined function descriptor or a defined entry symbol
9183 in a regular object file, then it is pointless trying to make
9184 any other type of stub. */
9185 if (!is_static_defined (&fdh->elf)
9186 && !is_static_defined (&h->elf))
9187 return ppc_stub_none;
9188 }
9189 else if (elf_local_got_ents (input_sec->owner) != NULL)
9190 {
9191 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (input_sec->owner);
9192 struct plt_entry **local_plt = (struct plt_entry **)
9193 elf_local_got_ents (input_sec->owner) + symtab_hdr->sh_info;
9194 unsigned long r_symndx = ELF64_R_SYM (rel->r_info);
9195
9196 if (local_plt[r_symndx] != NULL)
9197 {
9198 struct plt_entry *ent;
9199
9200 for (ent = local_plt[r_symndx]; ent != NULL; ent = ent->next)
9201 if (ent->addend == rel->r_addend
9202 && ent->plt.offset != (bfd_vma) -1)
9203 {
9204 *plt_ent = ent;
9205 return ppc_stub_plt_call;
9206 }
9207 }
9208 }
9209
9210 /* Determine where the call point is. */
9211 location = (input_sec->output_offset
9212 + input_sec->output_section->vma
9213 + rel->r_offset);
9214
9215 branch_offset = destination - location;
9216 r_type = ELF64_R_TYPE (rel->r_info);
9217
9218 /* Determine if a long branch stub is needed. */
9219 max_branch_offset = 1 << 25;
9220 if (r_type != R_PPC64_REL24)
9221 max_branch_offset = 1 << 15;
9222
9223 if (branch_offset + max_branch_offset >= 2 * max_branch_offset)
9224 /* We need a stub. Figure out whether a long_branch or plt_branch
9225 is needed later. */
9226 return ppc_stub_long_branch;
9227
9228 return ppc_stub_none;
9229 }
9230
9231 /* Build a .plt call stub. */
9232
9233 static inline bfd_byte *
9234 build_plt_stub (bfd *obfd, bfd_byte *p, int offset, Elf_Internal_Rela *r)
9235 {
9236 #define PPC_LO(v) ((v) & 0xffff)
9237 #define PPC_HI(v) (((v) >> 16) & 0xffff)
9238 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
9239
9240 if (PPC_HA (offset) != 0)
9241 {
9242 if (r != NULL)
9243 {
9244 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
9245 r[1].r_offset = r[0].r_offset + 8;
9246 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9247 r[1].r_addend = r[0].r_addend;
9248 if (PPC_HA (offset + 16) != PPC_HA (offset))
9249 {
9250 r[2].r_offset = r[1].r_offset + 4;
9251 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO);
9252 r[2].r_addend = r[0].r_addend;
9253 }
9254 else
9255 {
9256 r[2].r_offset = r[1].r_offset + 8;
9257 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9258 r[2].r_addend = r[0].r_addend + 8;
9259 r[3].r_offset = r[2].r_offset + 4;
9260 r[3].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9261 r[3].r_addend = r[0].r_addend + 16;
9262 }
9263 }
9264 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
9265 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
9266 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
9267 if (PPC_HA (offset + 16) != PPC_HA (offset))
9268 {
9269 bfd_put_32 (obfd, ADDI_R12_R12 | PPC_LO (offset), p), p += 4;
9270 offset = 0;
9271 }
9272 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
9273 bfd_put_32 (obfd, LD_R2_0R12 | PPC_LO (offset + 8), p), p += 4;
9274 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset + 16), p), p += 4;
9275 bfd_put_32 (obfd, BCTR, p), p += 4;
9276 }
9277 else
9278 {
9279 if (r != NULL)
9280 {
9281 r[0].r_offset += 4;
9282 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9283 if (PPC_HA (offset + 16) != PPC_HA (offset))
9284 {
9285 r[1].r_offset = r[0].r_offset + 4;
9286 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16);
9287 r[1].r_addend = r[0].r_addend;
9288 }
9289 else
9290 {
9291 r[1].r_offset = r[0].r_offset + 8;
9292 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9293 r[1].r_addend = r[0].r_addend + 16;
9294 r[2].r_offset = r[1].r_offset + 4;
9295 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9296 r[2].r_addend = r[0].r_addend + 8;
9297 }
9298 }
9299 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
9300 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset), p), p += 4;
9301 if (PPC_HA (offset + 16) != PPC_HA (offset))
9302 {
9303 bfd_put_32 (obfd, ADDI_R2_R2 | PPC_LO (offset), p), p += 4;
9304 offset = 0;
9305 }
9306 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
9307 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset + 16), p), p += 4;
9308 bfd_put_32 (obfd, LD_R2_0R2 | PPC_LO (offset + 8), p), p += 4;
9309 bfd_put_32 (obfd, BCTR, p), p += 4;
9310 }
9311 return p;
9312 }
9313
9314 /* Build a special .plt call stub for __tls_get_addr. */
9315
9316 #define LD_R11_0R3 0xe9630000
9317 #define LD_R12_0R3 0xe9830000
9318 #define MR_R0_R3 0x7c601b78
9319 #define CMPDI_R11_0 0x2c2b0000
9320 #define ADD_R3_R12_R13 0x7c6c6a14
9321 #define BEQLR 0x4d820020
9322 #define MR_R3_R0 0x7c030378
9323 #define MFLR_R11 0x7d6802a6
9324 #define STD_R11_0R1 0xf9610000
9325 #define BCTRL 0x4e800421
9326 #define LD_R11_0R1 0xe9610000
9327 #define LD_R2_0R1 0xe8410000
9328 #define MTLR_R11 0x7d6803a6
9329
9330 static inline bfd_byte *
9331 build_tls_get_addr_stub (bfd *obfd, bfd_byte *p, int offset,
9332 Elf_Internal_Rela *r)
9333 {
9334 bfd_put_32 (obfd, LD_R11_0R3 + 0, p), p += 4;
9335 bfd_put_32 (obfd, LD_R12_0R3 + 8, p), p += 4;
9336 bfd_put_32 (obfd, MR_R0_R3, p), p += 4;
9337 bfd_put_32 (obfd, CMPDI_R11_0, p), p += 4;
9338 bfd_put_32 (obfd, ADD_R3_R12_R13, p), p += 4;
9339 bfd_put_32 (obfd, BEQLR, p), p += 4;
9340 bfd_put_32 (obfd, MR_R3_R0, p), p += 4;
9341 bfd_put_32 (obfd, MFLR_R11, p), p += 4;
9342 bfd_put_32 (obfd, STD_R11_0R1 + 32, p), p += 4;
9343
9344 if (r != NULL)
9345 r[0].r_offset += 9 * 4;
9346 p = build_plt_stub (obfd, p, offset, r);
9347 bfd_put_32 (obfd, BCTRL, p - 4);
9348
9349 bfd_put_32 (obfd, LD_R11_0R1 + 32, p), p += 4;
9350 bfd_put_32 (obfd, LD_R2_0R1 + 40, p), p += 4;
9351 bfd_put_32 (obfd, MTLR_R11, p), p += 4;
9352 bfd_put_32 (obfd, BLR, p), p += 4;
9353
9354 return p;
9355 }
9356
9357 static Elf_Internal_Rela *
9358 get_relocs (asection *sec, int count)
9359 {
9360 Elf_Internal_Rela *relocs;
9361 struct bfd_elf_section_data *elfsec_data;
9362
9363 elfsec_data = elf_section_data (sec);
9364 relocs = elfsec_data->relocs;
9365 if (relocs == NULL)
9366 {
9367 bfd_size_type relsize;
9368 relsize = sec->reloc_count * sizeof (*relocs);
9369 relocs = bfd_alloc (sec->owner, relsize);
9370 if (relocs == NULL)
9371 return NULL;
9372 elfsec_data->relocs = relocs;
9373 elfsec_data->rel_hdr.sh_size = (sec->reloc_count
9374 * sizeof (Elf64_External_Rela));
9375 elfsec_data->rel_hdr.sh_entsize = sizeof (Elf64_External_Rela);
9376 sec->reloc_count = 0;
9377 }
9378 relocs += sec->reloc_count;
9379 sec->reloc_count += count;
9380 return relocs;
9381 }
9382
9383 static bfd_boolean
9384 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
9385 {
9386 struct ppc_stub_hash_entry *stub_entry;
9387 struct ppc_branch_hash_entry *br_entry;
9388 struct bfd_link_info *info;
9389 struct ppc_link_hash_table *htab;
9390 bfd_byte *loc;
9391 bfd_byte *p;
9392 bfd_vma dest, off;
9393 int size;
9394 Elf_Internal_Rela *r;
9395 asection *plt;
9396
9397 /* Massage our args to the form they really have. */
9398 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
9399 info = in_arg;
9400
9401 htab = ppc_hash_table (info);
9402 if (htab == NULL)
9403 return FALSE;
9404
9405 /* Make a note of the offset within the stubs for this entry. */
9406 stub_entry->stub_offset = stub_entry->stub_sec->size;
9407 loc = stub_entry->stub_sec->contents + stub_entry->stub_offset;
9408
9409 htab->stub_count[stub_entry->stub_type - 1] += 1;
9410 switch (stub_entry->stub_type)
9411 {
9412 case ppc_stub_long_branch:
9413 case ppc_stub_long_branch_r2off:
9414 /* Branches are relative. This is where we are going to. */
9415 off = dest = (stub_entry->target_value
9416 + stub_entry->target_section->output_offset
9417 + stub_entry->target_section->output_section->vma);
9418
9419 /* And this is where we are coming from. */
9420 off -= (stub_entry->stub_offset
9421 + stub_entry->stub_sec->output_offset
9422 + stub_entry->stub_sec->output_section->vma);
9423
9424 size = 4;
9425 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
9426 {
9427 bfd_vma r2off;
9428
9429 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
9430 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9431 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
9432 loc += 4;
9433 size = 12;
9434 if (PPC_HA (r2off) != 0)
9435 {
9436 size = 16;
9437 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
9438 loc += 4;
9439 }
9440 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
9441 loc += 4;
9442 off -= size - 4;
9443 }
9444 bfd_put_32 (htab->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
9445
9446 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
9447 {
9448 (*_bfd_error_handler) (_("long branch stub `%s' offset overflow"),
9449 stub_entry->root.string);
9450 htab->stub_error = TRUE;
9451 return FALSE;
9452 }
9453
9454 if (info->emitrelocations)
9455 {
9456 r = get_relocs (stub_entry->stub_sec, 1);
9457 if (r == NULL)
9458 return FALSE;
9459 r->r_offset = loc - stub_entry->stub_sec->contents;
9460 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
9461 r->r_addend = dest;
9462 if (stub_entry->h != NULL)
9463 {
9464 struct elf_link_hash_entry **hashes;
9465 unsigned long symndx;
9466 struct ppc_link_hash_entry *h;
9467
9468 hashes = elf_sym_hashes (htab->stub_bfd);
9469 if (hashes == NULL)
9470 {
9471 bfd_size_type hsize;
9472
9473 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
9474 hashes = bfd_zalloc (htab->stub_bfd, hsize);
9475 if (hashes == NULL)
9476 return FALSE;
9477 elf_sym_hashes (htab->stub_bfd) = hashes;
9478 htab->stub_globals = 1;
9479 }
9480 symndx = htab->stub_globals++;
9481 h = stub_entry->h;
9482 hashes[symndx] = &h->elf;
9483 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
9484 if (h->oh != NULL && h->oh->is_func)
9485 h = ppc_follow_link (h->oh);
9486 if (h->elf.root.u.def.section != stub_entry->target_section)
9487 /* H is an opd symbol. The addend must be zero. */
9488 r->r_addend = 0;
9489 else
9490 {
9491 off = (h->elf.root.u.def.value
9492 + h->elf.root.u.def.section->output_offset
9493 + h->elf.root.u.def.section->output_section->vma);
9494 r->r_addend -= off;
9495 }
9496 }
9497 }
9498 break;
9499
9500 case ppc_stub_plt_branch:
9501 case ppc_stub_plt_branch_r2off:
9502 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
9503 stub_entry->root.string + 9,
9504 FALSE, FALSE);
9505 if (br_entry == NULL)
9506 {
9507 (*_bfd_error_handler) (_("can't find branch stub `%s'"),
9508 stub_entry->root.string);
9509 htab->stub_error = TRUE;
9510 return FALSE;
9511 }
9512
9513 dest = (stub_entry->target_value
9514 + stub_entry->target_section->output_offset
9515 + stub_entry->target_section->output_section->vma);
9516
9517 bfd_put_64 (htab->brlt->owner, dest,
9518 htab->brlt->contents + br_entry->offset);
9519
9520 if (br_entry->iter == htab->stub_iteration)
9521 {
9522 br_entry->iter = 0;
9523
9524 if (htab->relbrlt != NULL)
9525 {
9526 /* Create a reloc for the branch lookup table entry. */
9527 Elf_Internal_Rela rela;
9528 bfd_byte *rl;
9529
9530 rela.r_offset = (br_entry->offset
9531 + htab->brlt->output_offset
9532 + htab->brlt->output_section->vma);
9533 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
9534 rela.r_addend = dest;
9535
9536 rl = htab->relbrlt->contents;
9537 rl += (htab->relbrlt->reloc_count++
9538 * sizeof (Elf64_External_Rela));
9539 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
9540 }
9541 else if (info->emitrelocations)
9542 {
9543 r = get_relocs (htab->brlt, 1);
9544 if (r == NULL)
9545 return FALSE;
9546 /* brlt, being SEC_LINKER_CREATED does not go through the
9547 normal reloc processing. Symbols and offsets are not
9548 translated from input file to output file form, so
9549 set up the offset per the output file. */
9550 r->r_offset = (br_entry->offset
9551 + htab->brlt->output_offset
9552 + htab->brlt->output_section->vma);
9553 r->r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
9554 r->r_addend = dest;
9555 }
9556 }
9557
9558 dest = (br_entry->offset
9559 + htab->brlt->output_offset
9560 + htab->brlt->output_section->vma);
9561
9562 off = (dest
9563 - elf_gp (htab->brlt->output_section->owner)
9564 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9565
9566 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
9567 {
9568 (*_bfd_error_handler)
9569 (_("linkage table error against `%s'"),
9570 stub_entry->root.string);
9571 bfd_set_error (bfd_error_bad_value);
9572 htab->stub_error = TRUE;
9573 return FALSE;
9574 }
9575
9576 if (info->emitrelocations)
9577 {
9578 r = get_relocs (stub_entry->stub_sec, 1 + (PPC_HA (off) != 0));
9579 if (r == NULL)
9580 return FALSE;
9581 r[0].r_offset = loc - stub_entry->stub_sec->contents;
9582 if (bfd_big_endian (info->output_bfd))
9583 r[0].r_offset += 2;
9584 if (stub_entry->stub_type == ppc_stub_plt_branch_r2off)
9585 r[0].r_offset += 4;
9586 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9587 r[0].r_addend = dest;
9588 if (PPC_HA (off) != 0)
9589 {
9590 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
9591 r[1].r_offset = r[0].r_offset + 4;
9592 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9593 r[1].r_addend = r[0].r_addend;
9594 }
9595 }
9596
9597 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
9598 {
9599 if (PPC_HA (off) != 0)
9600 {
9601 size = 16;
9602 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (off), loc);
9603 loc += 4;
9604 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (off), loc);
9605 }
9606 else
9607 {
9608 size = 12;
9609 bfd_put_32 (htab->stub_bfd, LD_R11_0R2 | PPC_LO (off), loc);
9610 }
9611 }
9612 else
9613 {
9614 bfd_vma r2off;
9615
9616 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
9617 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9618 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
9619 loc += 4;
9620 size = 20;
9621 if (PPC_HA (off) != 0)
9622 {
9623 size += 4;
9624 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (off), loc);
9625 loc += 4;
9626 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (off), loc);
9627 loc += 4;
9628 }
9629 else
9630 {
9631 bfd_put_32 (htab->stub_bfd, LD_R11_0R2 | PPC_LO (off), loc);
9632 loc += 4;
9633 }
9634
9635 if (PPC_HA (r2off) != 0)
9636 {
9637 size += 4;
9638 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
9639 loc += 4;
9640 }
9641 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
9642 }
9643 loc += 4;
9644 bfd_put_32 (htab->stub_bfd, MTCTR_R11, loc);
9645 loc += 4;
9646 bfd_put_32 (htab->stub_bfd, BCTR, loc);
9647 break;
9648
9649 case ppc_stub_plt_call:
9650 if (stub_entry->h != NULL
9651 && stub_entry->h->is_func_descriptor
9652 && stub_entry->h->oh != NULL)
9653 {
9654 struct ppc_link_hash_entry *fh = ppc_follow_link (stub_entry->h->oh);
9655
9656 /* If the old-ABI "dot-symbol" is undefined make it weak so
9657 we don't get a link error from RELOC_FOR_GLOBAL_SYMBOL.
9658 FIXME: We used to define the symbol on one of the call
9659 stubs instead, which is why we test symbol section id
9660 against htab->top_id in various places. Likely all
9661 these checks could now disappear. */
9662 if (fh->elf.root.type == bfd_link_hash_undefined)
9663 fh->elf.root.type = bfd_link_hash_undefweak;
9664 }
9665
9666 /* Now build the stub. */
9667 dest = stub_entry->plt_ent->plt.offset & ~1;
9668 if (dest >= (bfd_vma) -2)
9669 abort ();
9670
9671 plt = htab->plt;
9672 if (!htab->elf.dynamic_sections_created
9673 || stub_entry->h == NULL
9674 || stub_entry->h->elf.dynindx == -1)
9675 plt = htab->iplt;
9676
9677 dest += plt->output_offset + plt->output_section->vma;
9678
9679 if (stub_entry->h == NULL
9680 && (stub_entry->plt_ent->plt.offset & 1) == 0)
9681 {
9682 Elf_Internal_Rela rela;
9683 bfd_byte *rl;
9684
9685 rela.r_offset = dest;
9686 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
9687 rela.r_addend = (stub_entry->target_value
9688 + stub_entry->target_section->output_offset
9689 + stub_entry->target_section->output_section->vma);
9690
9691 rl = (htab->reliplt->contents
9692 + (htab->reliplt->reloc_count++
9693 * sizeof (Elf64_External_Rela)));
9694 bfd_elf64_swap_reloca_out (info->output_bfd, &rela, rl);
9695 stub_entry->plt_ent->plt.offset |= 1;
9696 }
9697
9698 off = (dest
9699 - elf_gp (plt->output_section->owner)
9700 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9701
9702 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
9703 {
9704 (*_bfd_error_handler)
9705 (_("linkage table error against `%s'"),
9706 stub_entry->h != NULL
9707 ? stub_entry->h->elf.root.root.string
9708 : "<local sym>");
9709 bfd_set_error (bfd_error_bad_value);
9710 htab->stub_error = TRUE;
9711 return FALSE;
9712 }
9713
9714 r = NULL;
9715 if (info->emitrelocations)
9716 {
9717 r = get_relocs (stub_entry->stub_sec,
9718 (2 + (PPC_HA (off) != 0)
9719 + (PPC_HA (off + 16) == PPC_HA (off))));
9720 if (r == NULL)
9721 return FALSE;
9722 r[0].r_offset = loc - stub_entry->stub_sec->contents;
9723 if (bfd_big_endian (info->output_bfd))
9724 r[0].r_offset += 2;
9725 r[0].r_addend = dest;
9726 }
9727 if (stub_entry->h != NULL
9728 && (stub_entry->h == htab->tls_get_addr_fd
9729 || stub_entry->h == htab->tls_get_addr)
9730 && !htab->no_tls_get_addr_opt)
9731 p = build_tls_get_addr_stub (htab->stub_bfd, loc, off, r);
9732 else
9733 p = build_plt_stub (htab->stub_bfd, loc, off, r);
9734 size = p - loc;
9735 break;
9736
9737 default:
9738 BFD_FAIL ();
9739 return FALSE;
9740 }
9741
9742 stub_entry->stub_sec->size += size;
9743
9744 if (htab->emit_stub_syms)
9745 {
9746 struct elf_link_hash_entry *h;
9747 size_t len1, len2;
9748 char *name;
9749 const char *const stub_str[] = { "long_branch",
9750 "long_branch_r2off",
9751 "plt_branch",
9752 "plt_branch_r2off",
9753 "plt_call" };
9754
9755 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
9756 len2 = strlen (stub_entry->root.string);
9757 name = bfd_malloc (len1 + len2 + 2);
9758 if (name == NULL)
9759 return FALSE;
9760 memcpy (name, stub_entry->root.string, 9);
9761 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
9762 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
9763 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
9764 if (h == NULL)
9765 return FALSE;
9766 if (h->root.type == bfd_link_hash_new)
9767 {
9768 h->root.type = bfd_link_hash_defined;
9769 h->root.u.def.section = stub_entry->stub_sec;
9770 h->root.u.def.value = stub_entry->stub_offset;
9771 h->ref_regular = 1;
9772 h->def_regular = 1;
9773 h->ref_regular_nonweak = 1;
9774 h->forced_local = 1;
9775 h->non_elf = 0;
9776 }
9777 }
9778
9779 return TRUE;
9780 }
9781
9782 /* As above, but don't actually build the stub. Just bump offset so
9783 we know stub section sizes, and select plt_branch stubs where
9784 long_branch stubs won't do. */
9785
9786 static bfd_boolean
9787 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
9788 {
9789 struct ppc_stub_hash_entry *stub_entry;
9790 struct bfd_link_info *info;
9791 struct ppc_link_hash_table *htab;
9792 bfd_vma off;
9793 int size;
9794
9795 /* Massage our args to the form they really have. */
9796 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
9797 info = in_arg;
9798
9799 htab = ppc_hash_table (info);
9800 if (htab == NULL)
9801 return FALSE;
9802
9803 if (stub_entry->stub_type == ppc_stub_plt_call)
9804 {
9805 asection *plt;
9806 off = stub_entry->plt_ent->plt.offset & ~(bfd_vma) 1;
9807 if (off >= (bfd_vma) -2)
9808 abort ();
9809 plt = htab->plt;
9810 if (!htab->elf.dynamic_sections_created
9811 || stub_entry->h == NULL
9812 || stub_entry->h->elf.dynindx == -1)
9813 plt = htab->iplt;
9814 off += (plt->output_offset
9815 + plt->output_section->vma
9816 - elf_gp (plt->output_section->owner)
9817 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9818
9819 size = PLT_CALL_STUB_SIZE;
9820 if (PPC_HA (off) == 0)
9821 size -= 4;
9822 if (PPC_HA (off + 16) != PPC_HA (off))
9823 size += 4;
9824 if (stub_entry->h != NULL
9825 && (stub_entry->h == htab->tls_get_addr_fd
9826 || stub_entry->h == htab->tls_get_addr)
9827 && !htab->no_tls_get_addr_opt)
9828 size += 13 * 4;
9829 if (info->emitrelocations)
9830 {
9831 stub_entry->stub_sec->reloc_count
9832 += 2 + (PPC_HA (off) != 0) + (PPC_HA (off + 16) == PPC_HA (off));
9833 stub_entry->stub_sec->flags |= SEC_RELOC;
9834 }
9835 }
9836 else
9837 {
9838 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
9839 variants. */
9840 bfd_vma r2off = 0;
9841
9842 off = (stub_entry->target_value
9843 + stub_entry->target_section->output_offset
9844 + stub_entry->target_section->output_section->vma);
9845 off -= (stub_entry->stub_sec->size
9846 + stub_entry->stub_sec->output_offset
9847 + stub_entry->stub_sec->output_section->vma);
9848
9849 /* Reset the stub type from the plt variant in case we now
9850 can reach with a shorter stub. */
9851 if (stub_entry->stub_type >= ppc_stub_plt_branch)
9852 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
9853
9854 size = 4;
9855 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
9856 {
9857 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
9858 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9859 size = 12;
9860 if (PPC_HA (r2off) != 0)
9861 size = 16;
9862 off -= size - 4;
9863 }
9864
9865 /* If the branch offset if too big, use a ppc_stub_plt_branch. */
9866 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
9867 {
9868 struct ppc_branch_hash_entry *br_entry;
9869
9870 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
9871 stub_entry->root.string + 9,
9872 TRUE, FALSE);
9873 if (br_entry == NULL)
9874 {
9875 (*_bfd_error_handler) (_("can't build branch stub `%s'"),
9876 stub_entry->root.string);
9877 htab->stub_error = TRUE;
9878 return FALSE;
9879 }
9880
9881 if (br_entry->iter != htab->stub_iteration)
9882 {
9883 br_entry->iter = htab->stub_iteration;
9884 br_entry->offset = htab->brlt->size;
9885 htab->brlt->size += 8;
9886
9887 if (htab->relbrlt != NULL)
9888 htab->relbrlt->size += sizeof (Elf64_External_Rela);
9889 else if (info->emitrelocations)
9890 {
9891 htab->brlt->reloc_count += 1;
9892 htab->brlt->flags |= SEC_RELOC;
9893 }
9894 }
9895
9896 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
9897 off = (br_entry->offset
9898 + htab->brlt->output_offset
9899 + htab->brlt->output_section->vma
9900 - elf_gp (htab->brlt->output_section->owner)
9901 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9902
9903 if (info->emitrelocations)
9904 {
9905 stub_entry->stub_sec->reloc_count += 1 + (PPC_HA (off) != 0);
9906 stub_entry->stub_sec->flags |= SEC_RELOC;
9907 }
9908
9909 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
9910 {
9911 size = 12;
9912 if (PPC_HA (off) != 0)
9913 size = 16;
9914 }
9915 else
9916 {
9917 size = 20;
9918 if (PPC_HA (off) != 0)
9919 size += 4;
9920
9921 if (PPC_HA (r2off) != 0)
9922 size += 4;
9923 }
9924 }
9925 else if (info->emitrelocations)
9926 {
9927 stub_entry->stub_sec->reloc_count += 1;
9928 stub_entry->stub_sec->flags |= SEC_RELOC;
9929 }
9930 }
9931
9932 stub_entry->stub_sec->size += size;
9933 return TRUE;
9934 }
9935
9936 /* Set up various things so that we can make a list of input sections
9937 for each output section included in the link. Returns -1 on error,
9938 0 when no stubs will be needed, and 1 on success. */
9939
9940 int
9941 ppc64_elf_setup_section_lists
9942 (struct bfd_link_info *info,
9943 asection *(*add_stub_section) (const char *, asection *),
9944 void (*layout_sections_again) (void))
9945 {
9946 bfd *input_bfd;
9947 int top_id, top_index, id;
9948 asection *section;
9949 asection **input_list;
9950 bfd_size_type amt;
9951 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9952
9953 if (htab == NULL)
9954 return -1;
9955 /* Stash our params away. */
9956 htab->add_stub_section = add_stub_section;
9957 htab->layout_sections_again = layout_sections_again;
9958
9959 if (htab->brlt == NULL)
9960 return 0;
9961
9962 /* Find the top input section id. */
9963 for (input_bfd = info->input_bfds, top_id = 3;
9964 input_bfd != NULL;
9965 input_bfd = input_bfd->link_next)
9966 {
9967 for (section = input_bfd->sections;
9968 section != NULL;
9969 section = section->next)
9970 {
9971 if (top_id < section->id)
9972 top_id = section->id;
9973 }
9974 }
9975
9976 htab->top_id = top_id;
9977 amt = sizeof (struct map_stub) * (top_id + 1);
9978 htab->stub_group = bfd_zmalloc (amt);
9979 if (htab->stub_group == NULL)
9980 return -1;
9981
9982 /* Set toc_off for com, und, abs and ind sections. */
9983 for (id = 0; id < 3; id++)
9984 htab->stub_group[id].toc_off = TOC_BASE_OFF;
9985
9986 /* We can't use output_bfd->section_count here to find the top output
9987 section index as some sections may have been removed, and
9988 strip_excluded_output_sections doesn't renumber the indices. */
9989 for (section = info->output_bfd->sections, top_index = 0;
9990 section != NULL;
9991 section = section->next)
9992 {
9993 if (top_index < section->index)
9994 top_index = section->index;
9995 }
9996
9997 htab->top_index = top_index;
9998 amt = sizeof (asection *) * (top_index + 1);
9999 input_list = bfd_zmalloc (amt);
10000 htab->input_list = input_list;
10001 if (input_list == NULL)
10002 return -1;
10003
10004 return 1;
10005 }
10006
10007 /* Set up for first pass at multitoc partitioning. */
10008
10009 void
10010 ppc64_elf_start_multitoc_partition (struct bfd_link_info *info)
10011 {
10012 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10013
10014 elf_gp (info->output_bfd) = ppc64_elf_toc (info->output_bfd);
10015 htab->toc_curr = elf_gp (info->output_bfd);
10016 htab->toc_bfd = NULL;
10017 htab->toc_first_sec = NULL;
10018 }
10019
10020 /* The linker repeatedly calls this function for each TOC input section
10021 and linker generated GOT section. Group input bfds such that the toc
10022 within a group is less than 64k in size. */
10023
10024 bfd_boolean
10025 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
10026 {
10027 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10028 bfd_vma addr, off, limit;
10029
10030 if (htab == NULL)
10031 return FALSE;
10032
10033 if (!htab->second_toc_pass)
10034 {
10035 /* Keep track of the first .toc or .got section for this input bfd. */
10036 if (htab->toc_bfd != isec->owner)
10037 {
10038 htab->toc_bfd = isec->owner;
10039 htab->toc_first_sec = isec;
10040 }
10041
10042 addr = isec->output_offset + isec->output_section->vma;
10043 off = addr - htab->toc_curr;
10044 limit = 0x80008000;
10045 if (ppc64_elf_tdata (isec->owner)->has_small_toc_reloc)
10046 limit = 0x10000;
10047 if (off + isec->size > limit)
10048 {
10049 addr = (htab->toc_first_sec->output_offset
10050 + htab->toc_first_sec->output_section->vma);
10051 htab->toc_curr = addr;
10052 }
10053
10054 /* toc_curr is the base address of this toc group. Set elf_gp
10055 for the input section to be the offset relative to the
10056 output toc base plus 0x8000. Making the input elf_gp an
10057 offset allows us to move the toc as a whole without
10058 recalculating input elf_gp. */
10059 off = htab->toc_curr - elf_gp (isec->output_section->owner);
10060 off += TOC_BASE_OFF;
10061
10062 /* Die if someone uses a linker script that doesn't keep input
10063 file .toc and .got together. */
10064 if (elf_gp (isec->owner) != 0
10065 && elf_gp (isec->owner) != off)
10066 return FALSE;
10067
10068 elf_gp (isec->owner) = off;
10069 return TRUE;
10070 }
10071
10072 /* During the second pass toc_first_sec points to the start of
10073 a toc group, and toc_curr is used to track the old elf_gp.
10074 We use toc_bfd to ensure we only look at each bfd once. */
10075 if (htab->toc_bfd == isec->owner)
10076 return TRUE;
10077 htab->toc_bfd = isec->owner;
10078
10079 if (htab->toc_first_sec == NULL
10080 || htab->toc_curr != elf_gp (isec->owner))
10081 {
10082 htab->toc_curr = elf_gp (isec->owner);
10083 htab->toc_first_sec = isec;
10084 }
10085 addr = (htab->toc_first_sec->output_offset
10086 + htab->toc_first_sec->output_section->vma);
10087 off = addr - elf_gp (isec->output_section->owner) + TOC_BASE_OFF;
10088 elf_gp (isec->owner) = off;
10089
10090 return TRUE;
10091 }
10092
10093 /* Called via elf_link_hash_traverse to merge GOT entries for global
10094 symbol H. */
10095
10096 static bfd_boolean
10097 merge_global_got (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
10098 {
10099 if (h->root.type == bfd_link_hash_indirect)
10100 return TRUE;
10101
10102 if (h->root.type == bfd_link_hash_warning)
10103 h = (struct elf_link_hash_entry *) h->root.u.i.link;
10104
10105 merge_got_entries (&h->got.glist);
10106
10107 return TRUE;
10108 }
10109
10110 /* Called via elf_link_hash_traverse to allocate GOT entries for global
10111 symbol H. */
10112
10113 static bfd_boolean
10114 reallocate_got (struct elf_link_hash_entry *h, void *inf)
10115 {
10116 struct got_entry *gent;
10117
10118 if (h->root.type == bfd_link_hash_indirect)
10119 return TRUE;
10120
10121 if (h->root.type == bfd_link_hash_warning)
10122 h = (struct elf_link_hash_entry *) h->root.u.i.link;
10123
10124 for (gent = h->got.glist; gent != NULL; gent = gent->next)
10125 if (!gent->is_indirect)
10126 allocate_got (h, (struct bfd_link_info *) inf, gent);
10127 return TRUE;
10128 }
10129
10130 /* Called on the first multitoc pass after the last call to
10131 ppc64_elf_next_toc_section. This function removes duplicate GOT
10132 entries. */
10133
10134 bfd_boolean
10135 ppc64_elf_layout_multitoc (struct bfd_link_info *info)
10136 {
10137 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10138 struct bfd *ibfd, *ibfd2;
10139 bfd_boolean done_something;
10140
10141 htab->multi_toc_needed = htab->toc_curr != elf_gp (info->output_bfd);
10142
10143 if (!htab->do_multi_toc)
10144 return FALSE;
10145
10146 /* Merge global sym got entries within a toc group. */
10147 elf_link_hash_traverse (&htab->elf, merge_global_got, info);
10148
10149 /* And tlsld_got. */
10150 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10151 {
10152 struct got_entry *ent, *ent2;
10153
10154 if (!is_ppc64_elf (ibfd))
10155 continue;
10156
10157 ent = ppc64_tlsld_got (ibfd);
10158 if (!ent->is_indirect
10159 && ent->got.offset != (bfd_vma) -1)
10160 {
10161 for (ibfd2 = ibfd->link_next; ibfd2 != NULL; ibfd2 = ibfd2->link_next)
10162 {
10163 if (!is_ppc64_elf (ibfd2))
10164 continue;
10165
10166 ent2 = ppc64_tlsld_got (ibfd2);
10167 if (!ent2->is_indirect
10168 && ent2->got.offset != (bfd_vma) -1
10169 && elf_gp (ibfd2) == elf_gp (ibfd))
10170 {
10171 ent2->is_indirect = TRUE;
10172 ent2->got.ent = ent;
10173 }
10174 }
10175 }
10176 }
10177
10178 /* Zap sizes of got sections. */
10179 htab->reliplt->rawsize = htab->reliplt->size;
10180 htab->reliplt->size -= htab->got_reli_size;
10181 htab->got_reli_size = 0;
10182
10183 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10184 {
10185 asection *got, *relgot;
10186
10187 if (!is_ppc64_elf (ibfd))
10188 continue;
10189
10190 got = ppc64_elf_tdata (ibfd)->got;
10191 if (got != NULL)
10192 {
10193 got->rawsize = got->size;
10194 got->size = 0;
10195 relgot = ppc64_elf_tdata (ibfd)->relgot;
10196 relgot->rawsize = relgot->size;
10197 relgot->size = 0;
10198 }
10199 }
10200
10201 /* Now reallocate the got, local syms first. We don't need to
10202 allocate section contents again since we never increase size. */
10203 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10204 {
10205 struct got_entry **lgot_ents;
10206 struct got_entry **end_lgot_ents;
10207 struct plt_entry **local_plt;
10208 struct plt_entry **end_local_plt;
10209 unsigned char *lgot_masks;
10210 bfd_size_type locsymcount;
10211 Elf_Internal_Shdr *symtab_hdr;
10212 asection *s, *srel;
10213
10214 if (!is_ppc64_elf (ibfd))
10215 continue;
10216
10217 lgot_ents = elf_local_got_ents (ibfd);
10218 if (!lgot_ents)
10219 continue;
10220
10221 symtab_hdr = &elf_symtab_hdr (ibfd);
10222 locsymcount = symtab_hdr->sh_info;
10223 end_lgot_ents = lgot_ents + locsymcount;
10224 local_plt = (struct plt_entry **) end_lgot_ents;
10225 end_local_plt = local_plt + locsymcount;
10226 lgot_masks = (unsigned char *) end_local_plt;
10227 s = ppc64_elf_tdata (ibfd)->got;
10228 srel = ppc64_elf_tdata (ibfd)->relgot;
10229 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
10230 {
10231 struct got_entry *ent;
10232
10233 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
10234 {
10235 unsigned int num = 1;
10236 ent->got.offset = s->size;
10237 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
10238 num = 2;
10239 s->size += num * 8;
10240 if (info->shared)
10241 srel->size += num * sizeof (Elf64_External_Rela);
10242 else if ((*lgot_masks & PLT_IFUNC) != 0)
10243 {
10244 htab->reliplt->size
10245 += num * sizeof (Elf64_External_Rela);
10246 htab->got_reli_size
10247 += num * sizeof (Elf64_External_Rela);
10248 }
10249 }
10250 }
10251 }
10252
10253 elf_link_hash_traverse (&htab->elf, reallocate_got, info);
10254
10255 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10256 {
10257 struct got_entry *ent;
10258
10259 if (!is_ppc64_elf (ibfd))
10260 continue;
10261
10262 ent = ppc64_tlsld_got (ibfd);
10263 if (!ent->is_indirect
10264 && ent->got.offset != (bfd_vma) -1)
10265 {
10266 asection *s = ppc64_elf_tdata (ibfd)->got;
10267 ent->got.offset = s->size;
10268 s->size += 16;
10269 if (info->shared)
10270 {
10271 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
10272 srel->size += sizeof (Elf64_External_Rela);
10273 }
10274 }
10275 }
10276
10277 done_something = htab->reliplt->rawsize != htab->reliplt->size;
10278 if (!done_something)
10279 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10280 {
10281 asection *got;
10282
10283 if (!is_ppc64_elf (ibfd))
10284 continue;
10285
10286 got = ppc64_elf_tdata (ibfd)->got;
10287 if (got != NULL)
10288 {
10289 done_something = got->rawsize != got->size;
10290 if (done_something)
10291 break;
10292 }
10293 }
10294
10295 if (done_something)
10296 (*htab->layout_sections_again) ();
10297
10298 /* Set up for second pass over toc sections to recalculate elf_gp
10299 on input sections. */
10300 htab->toc_bfd = NULL;
10301 htab->toc_first_sec = NULL;
10302 htab->second_toc_pass = TRUE;
10303 return done_something;
10304 }
10305
10306 /* Called after second pass of multitoc partitioning. */
10307
10308 void
10309 ppc64_elf_finish_multitoc_partition (struct bfd_link_info *info)
10310 {
10311 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10312
10313 /* After the second pass, toc_curr tracks the TOC offset used
10314 for code sections below in ppc64_elf_next_input_section. */
10315 htab->toc_curr = TOC_BASE_OFF;
10316 }
10317
10318 /* No toc references were found in ISEC. If the code in ISEC makes no
10319 calls, then there's no need to use toc adjusting stubs when branching
10320 into ISEC. Actually, indirect calls from ISEC are OK as they will
10321 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
10322 needed, and 2 if a cyclical call-graph was found but no other reason
10323 for a stub was detected. If called from the top level, a return of
10324 2 means the same as a return of 0. */
10325
10326 static int
10327 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
10328 {
10329 int ret;
10330
10331 /* Mark this section as checked. */
10332 isec->call_check_done = 1;
10333
10334 /* We know none of our code bearing sections will need toc stubs. */
10335 if ((isec->flags & SEC_LINKER_CREATED) != 0)
10336 return 0;
10337
10338 if (isec->size == 0)
10339 return 0;
10340
10341 if (isec->output_section == NULL)
10342 return 0;
10343
10344 ret = 0;
10345 if (isec->reloc_count != 0)
10346 {
10347 Elf_Internal_Rela *relstart, *rel;
10348 Elf_Internal_Sym *local_syms;
10349 struct ppc_link_hash_table *htab;
10350
10351 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
10352 info->keep_memory);
10353 if (relstart == NULL)
10354 return -1;
10355
10356 /* Look for branches to outside of this section. */
10357 local_syms = NULL;
10358 htab = ppc_hash_table (info);
10359 if (htab == NULL)
10360 return -1;
10361
10362 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
10363 {
10364 enum elf_ppc64_reloc_type r_type;
10365 unsigned long r_symndx;
10366 struct elf_link_hash_entry *h;
10367 struct ppc_link_hash_entry *eh;
10368 Elf_Internal_Sym *sym;
10369 asection *sym_sec;
10370 struct _opd_sec_data *opd;
10371 bfd_vma sym_value;
10372 bfd_vma dest;
10373
10374 r_type = ELF64_R_TYPE (rel->r_info);
10375 if (r_type != R_PPC64_REL24
10376 && r_type != R_PPC64_REL14
10377 && r_type != R_PPC64_REL14_BRTAKEN
10378 && r_type != R_PPC64_REL14_BRNTAKEN)
10379 continue;
10380
10381 r_symndx = ELF64_R_SYM (rel->r_info);
10382 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
10383 isec->owner))
10384 {
10385 ret = -1;
10386 break;
10387 }
10388
10389 /* Calls to dynamic lib functions go through a plt call stub
10390 that uses r2. */
10391 eh = (struct ppc_link_hash_entry *) h;
10392 if (eh != NULL
10393 && (eh->elf.plt.plist != NULL
10394 || (eh->oh != NULL
10395 && ppc_follow_link (eh->oh)->elf.plt.plist != NULL)))
10396 {
10397 ret = 1;
10398 break;
10399 }
10400
10401 if (sym_sec == NULL)
10402 /* Ignore other undefined symbols. */
10403 continue;
10404
10405 /* Assume branches to other sections not included in the
10406 link need stubs too, to cover -R and absolute syms. */
10407 if (sym_sec->output_section == NULL)
10408 {
10409 ret = 1;
10410 break;
10411 }
10412
10413 if (h == NULL)
10414 sym_value = sym->st_value;
10415 else
10416 {
10417 if (h->root.type != bfd_link_hash_defined
10418 && h->root.type != bfd_link_hash_defweak)
10419 abort ();
10420 sym_value = h->root.u.def.value;
10421 }
10422 sym_value += rel->r_addend;
10423
10424 /* If this branch reloc uses an opd sym, find the code section. */
10425 opd = get_opd_info (sym_sec);
10426 if (opd != NULL)
10427 {
10428 if (h == NULL && opd->adjust != NULL)
10429 {
10430 long adjust;
10431
10432 adjust = opd->adjust[sym->st_value / 8];
10433 if (adjust == -1)
10434 /* Assume deleted functions won't ever be called. */
10435 continue;
10436 sym_value += adjust;
10437 }
10438
10439 dest = opd_entry_value (sym_sec, sym_value, &sym_sec, NULL);
10440 if (dest == (bfd_vma) -1)
10441 continue;
10442 }
10443 else
10444 dest = (sym_value
10445 + sym_sec->output_offset
10446 + sym_sec->output_section->vma);
10447
10448 /* Ignore branch to self. */
10449 if (sym_sec == isec)
10450 continue;
10451
10452 /* If the called function uses the toc, we need a stub. */
10453 if (sym_sec->has_toc_reloc
10454 || sym_sec->makes_toc_func_call)
10455 {
10456 ret = 1;
10457 break;
10458 }
10459
10460 /* Assume any branch that needs a long branch stub might in fact
10461 need a plt_branch stub. A plt_branch stub uses r2. */
10462 else if (dest - (isec->output_offset
10463 + isec->output_section->vma
10464 + rel->r_offset) + (1 << 25) >= (2 << 25))
10465 {
10466 ret = 1;
10467 break;
10468 }
10469
10470 /* If calling back to a section in the process of being
10471 tested, we can't say for sure that no toc adjusting stubs
10472 are needed, so don't return zero. */
10473 else if (sym_sec->call_check_in_progress)
10474 ret = 2;
10475
10476 /* Branches to another section that itself doesn't have any TOC
10477 references are OK. Recursively call ourselves to check. */
10478 else if (!sym_sec->call_check_done)
10479 {
10480 int recur;
10481
10482 /* Mark current section as indeterminate, so that other
10483 sections that call back to current won't be marked as
10484 known. */
10485 isec->call_check_in_progress = 1;
10486 recur = toc_adjusting_stub_needed (info, sym_sec);
10487 isec->call_check_in_progress = 0;
10488
10489 if (recur != 0)
10490 {
10491 ret = recur;
10492 if (recur != 2)
10493 break;
10494 }
10495 }
10496 }
10497
10498 if (local_syms != NULL
10499 && (elf_symtab_hdr (isec->owner).contents
10500 != (unsigned char *) local_syms))
10501 free (local_syms);
10502 if (elf_section_data (isec)->relocs != relstart)
10503 free (relstart);
10504 }
10505
10506 if ((ret & 1) == 0
10507 && isec->map_head.s != NULL
10508 && (strcmp (isec->output_section->name, ".init") == 0
10509 || strcmp (isec->output_section->name, ".fini") == 0))
10510 {
10511 if (isec->map_head.s->has_toc_reloc
10512 || isec->map_head.s->makes_toc_func_call)
10513 ret = 1;
10514 else if (!isec->map_head.s->call_check_done)
10515 {
10516 int recur;
10517 isec->call_check_in_progress = 1;
10518 recur = toc_adjusting_stub_needed (info, isec->map_head.s);
10519 isec->call_check_in_progress = 0;
10520 if (recur != 0)
10521 ret = recur;
10522 }
10523 }
10524
10525 if (ret == 1)
10526 isec->makes_toc_func_call = 1;
10527
10528 return ret;
10529 }
10530
10531 /* The linker repeatedly calls this function for each input section,
10532 in the order that input sections are linked into output sections.
10533 Build lists of input sections to determine groupings between which
10534 we may insert linker stubs. */
10535
10536 bfd_boolean
10537 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
10538 {
10539 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10540
10541 if (htab == NULL)
10542 return FALSE;
10543
10544 if ((isec->output_section->flags & SEC_CODE) != 0
10545 && isec->output_section->index <= htab->top_index)
10546 {
10547 asection **list = htab->input_list + isec->output_section->index;
10548 /* Steal the link_sec pointer for our list. */
10549 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
10550 /* This happens to make the list in reverse order,
10551 which is what we want. */
10552 PREV_SEC (isec) = *list;
10553 *list = isec;
10554 }
10555
10556 if (htab->multi_toc_needed)
10557 {
10558 /* If a code section has a function that uses the TOC then we need
10559 to use the right TOC (obviously). Also, make sure that .opd gets
10560 the correct TOC value for R_PPC64_TOC relocs that don't have or
10561 can't find their function symbol (shouldn't ever happen now).
10562 Also specially treat .fixup for the linux kernel. .fixup
10563 contains branches, but only back to the function that hit an
10564 exception. */
10565 if (isec->has_toc_reloc
10566 || (isec->flags & SEC_CODE) == 0
10567 || strcmp (isec->name, ".fixup") == 0)
10568 {
10569 if (elf_gp (isec->owner) != 0)
10570 htab->toc_curr = elf_gp (isec->owner);
10571 }
10572 else if (!isec->call_check_done
10573 && toc_adjusting_stub_needed (info, isec) < 0)
10574 return FALSE;
10575 }
10576
10577 /* Functions that don't use the TOC can belong in any TOC group.
10578 Use the last TOC base. This happens to make _init and _fini
10579 pasting work, because the fragments generally don't use the TOC. */
10580 htab->stub_group[isec->id].toc_off = htab->toc_curr;
10581 return TRUE;
10582 }
10583
10584 /* Check that all .init and .fini sections use the same toc, if they
10585 have toc relocs. */
10586
10587 static bfd_boolean
10588 check_pasted_section (struct bfd_link_info *info, const char *name)
10589 {
10590 asection *o = bfd_get_section_by_name (info->output_bfd, name);
10591
10592 if (o != NULL)
10593 {
10594 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10595 bfd_vma toc_off = 0;
10596 asection *i;
10597
10598 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
10599 if (i->has_toc_reloc)
10600 {
10601 if (toc_off == 0)
10602 toc_off = htab->stub_group[i->id].toc_off;
10603 else if (toc_off != htab->stub_group[i->id].toc_off)
10604 return FALSE;
10605 }
10606 /* Make sure the whole pasted function uses the same toc offset. */
10607 if (toc_off != 0)
10608 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
10609 htab->stub_group[i->id].toc_off = toc_off;
10610 }
10611 return TRUE;
10612 }
10613
10614 bfd_boolean
10615 ppc64_elf_check_init_fini (struct bfd_link_info *info)
10616 {
10617 return (check_pasted_section (info, ".init")
10618 & check_pasted_section (info, ".fini"));
10619 }
10620
10621 /* See whether we can group stub sections together. Grouping stub
10622 sections may result in fewer stubs. More importantly, we need to
10623 put all .init* and .fini* stubs at the beginning of the .init or
10624 .fini output sections respectively, because glibc splits the
10625 _init and _fini functions into multiple parts. Putting a stub in
10626 the middle of a function is not a good idea. */
10627
10628 static void
10629 group_sections (struct ppc_link_hash_table *htab,
10630 bfd_size_type stub_group_size,
10631 bfd_boolean stubs_always_before_branch)
10632 {
10633 asection **list;
10634 bfd_size_type stub14_group_size;
10635 bfd_boolean suppress_size_errors;
10636
10637 suppress_size_errors = FALSE;
10638 stub14_group_size = stub_group_size;
10639 if (stub_group_size == 1)
10640 {
10641 /* Default values. */
10642 if (stubs_always_before_branch)
10643 {
10644 stub_group_size = 0x1e00000;
10645 stub14_group_size = 0x7800;
10646 }
10647 else
10648 {
10649 stub_group_size = 0x1c00000;
10650 stub14_group_size = 0x7000;
10651 }
10652 suppress_size_errors = TRUE;
10653 }
10654
10655 list = htab->input_list + htab->top_index;
10656 do
10657 {
10658 asection *tail = *list;
10659 while (tail != NULL)
10660 {
10661 asection *curr;
10662 asection *prev;
10663 bfd_size_type total;
10664 bfd_boolean big_sec;
10665 bfd_vma curr_toc;
10666
10667 curr = tail;
10668 total = tail->size;
10669 big_sec = total > (ppc64_elf_section_data (tail)->has_14bit_branch
10670 ? stub14_group_size : stub_group_size);
10671 if (big_sec && !suppress_size_errors)
10672 (*_bfd_error_handler) (_("%B section %A exceeds stub group size"),
10673 tail->owner, tail);
10674 curr_toc = htab->stub_group[tail->id].toc_off;
10675
10676 while ((prev = PREV_SEC (curr)) != NULL
10677 && ((total += curr->output_offset - prev->output_offset)
10678 < (ppc64_elf_section_data (prev)->has_14bit_branch
10679 ? stub14_group_size : stub_group_size))
10680 && htab->stub_group[prev->id].toc_off == curr_toc)
10681 curr = prev;
10682
10683 /* OK, the size from the start of CURR to the end is less
10684 than stub_group_size and thus can be handled by one stub
10685 section. (or the tail section is itself larger than
10686 stub_group_size, in which case we may be toast.) We
10687 should really be keeping track of the total size of stubs
10688 added here, as stubs contribute to the final output
10689 section size. That's a little tricky, and this way will
10690 only break if stubs added make the total size more than
10691 2^25, ie. for the default stub_group_size, if stubs total
10692 more than 2097152 bytes, or nearly 75000 plt call stubs. */
10693 do
10694 {
10695 prev = PREV_SEC (tail);
10696 /* Set up this stub group. */
10697 htab->stub_group[tail->id].link_sec = curr;
10698 }
10699 while (tail != curr && (tail = prev) != NULL);
10700
10701 /* But wait, there's more! Input sections up to stub_group_size
10702 bytes before the stub section can be handled by it too.
10703 Don't do this if we have a really large section after the
10704 stubs, as adding more stubs increases the chance that
10705 branches may not reach into the stub section. */
10706 if (!stubs_always_before_branch && !big_sec)
10707 {
10708 total = 0;
10709 while (prev != NULL
10710 && ((total += tail->output_offset - prev->output_offset)
10711 < (ppc64_elf_section_data (prev)->has_14bit_branch
10712 ? stub14_group_size : stub_group_size))
10713 && htab->stub_group[prev->id].toc_off == curr_toc)
10714 {
10715 tail = prev;
10716 prev = PREV_SEC (tail);
10717 htab->stub_group[tail->id].link_sec = curr;
10718 }
10719 }
10720 tail = prev;
10721 }
10722 }
10723 while (list-- != htab->input_list);
10724 free (htab->input_list);
10725 #undef PREV_SEC
10726 }
10727
10728 /* Determine and set the size of the stub section for a final link.
10729
10730 The basic idea here is to examine all the relocations looking for
10731 PC-relative calls to a target that is unreachable with a "bl"
10732 instruction. */
10733
10734 bfd_boolean
10735 ppc64_elf_size_stubs (struct bfd_link_info *info, bfd_signed_vma group_size)
10736 {
10737 bfd_size_type stub_group_size;
10738 bfd_boolean stubs_always_before_branch;
10739 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10740
10741 if (htab == NULL)
10742 return FALSE;
10743
10744 stubs_always_before_branch = group_size < 0;
10745 if (group_size < 0)
10746 stub_group_size = -group_size;
10747 else
10748 stub_group_size = group_size;
10749
10750 group_sections (htab, stub_group_size, stubs_always_before_branch);
10751
10752 while (1)
10753 {
10754 bfd *input_bfd;
10755 unsigned int bfd_indx;
10756 asection *stub_sec;
10757
10758 htab->stub_iteration += 1;
10759
10760 for (input_bfd = info->input_bfds, bfd_indx = 0;
10761 input_bfd != NULL;
10762 input_bfd = input_bfd->link_next, bfd_indx++)
10763 {
10764 Elf_Internal_Shdr *symtab_hdr;
10765 asection *section;
10766 Elf_Internal_Sym *local_syms = NULL;
10767
10768 if (!is_ppc64_elf (input_bfd))
10769 continue;
10770
10771 /* We'll need the symbol table in a second. */
10772 symtab_hdr = &elf_symtab_hdr (input_bfd);
10773 if (symtab_hdr->sh_info == 0)
10774 continue;
10775
10776 /* Walk over each section attached to the input bfd. */
10777 for (section = input_bfd->sections;
10778 section != NULL;
10779 section = section->next)
10780 {
10781 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
10782
10783 /* If there aren't any relocs, then there's nothing more
10784 to do. */
10785 if ((section->flags & SEC_RELOC) == 0
10786 || (section->flags & SEC_ALLOC) == 0
10787 || (section->flags & SEC_LOAD) == 0
10788 || (section->flags & SEC_CODE) == 0
10789 || section->reloc_count == 0)
10790 continue;
10791
10792 /* If this section is a link-once section that will be
10793 discarded, then don't create any stubs. */
10794 if (section->output_section == NULL
10795 || section->output_section->owner != info->output_bfd)
10796 continue;
10797
10798 /* Get the relocs. */
10799 internal_relocs
10800 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
10801 info->keep_memory);
10802 if (internal_relocs == NULL)
10803 goto error_ret_free_local;
10804
10805 /* Now examine each relocation. */
10806 irela = internal_relocs;
10807 irelaend = irela + section->reloc_count;
10808 for (; irela < irelaend; irela++)
10809 {
10810 enum elf_ppc64_reloc_type r_type;
10811 unsigned int r_indx;
10812 enum ppc_stub_type stub_type;
10813 struct ppc_stub_hash_entry *stub_entry;
10814 asection *sym_sec, *code_sec;
10815 bfd_vma sym_value, code_value;
10816 bfd_vma destination;
10817 bfd_boolean ok_dest;
10818 struct ppc_link_hash_entry *hash;
10819 struct ppc_link_hash_entry *fdh;
10820 struct elf_link_hash_entry *h;
10821 Elf_Internal_Sym *sym;
10822 char *stub_name;
10823 const asection *id_sec;
10824 struct _opd_sec_data *opd;
10825 struct plt_entry *plt_ent;
10826
10827 r_type = ELF64_R_TYPE (irela->r_info);
10828 r_indx = ELF64_R_SYM (irela->r_info);
10829
10830 if (r_type >= R_PPC64_max)
10831 {
10832 bfd_set_error (bfd_error_bad_value);
10833 goto error_ret_free_internal;
10834 }
10835
10836 /* Only look for stubs on branch instructions. */
10837 if (r_type != R_PPC64_REL24
10838 && r_type != R_PPC64_REL14
10839 && r_type != R_PPC64_REL14_BRTAKEN
10840 && r_type != R_PPC64_REL14_BRNTAKEN)
10841 continue;
10842
10843 /* Now determine the call target, its name, value,
10844 section. */
10845 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
10846 r_indx, input_bfd))
10847 goto error_ret_free_internal;
10848 hash = (struct ppc_link_hash_entry *) h;
10849
10850 ok_dest = FALSE;
10851 fdh = NULL;
10852 sym_value = 0;
10853 if (hash == NULL)
10854 {
10855 sym_value = sym->st_value;
10856 ok_dest = TRUE;
10857 }
10858 else if (hash->elf.root.type == bfd_link_hash_defined
10859 || hash->elf.root.type == bfd_link_hash_defweak)
10860 {
10861 sym_value = hash->elf.root.u.def.value;
10862 if (sym_sec->output_section != NULL)
10863 ok_dest = TRUE;
10864 }
10865 else if (hash->elf.root.type == bfd_link_hash_undefweak
10866 || hash->elf.root.type == bfd_link_hash_undefined)
10867 {
10868 /* Recognise an old ABI func code entry sym, and
10869 use the func descriptor sym instead if it is
10870 defined. */
10871 if (hash->elf.root.root.string[0] == '.'
10872 && (fdh = lookup_fdh (hash, htab)) != NULL)
10873 {
10874 if (fdh->elf.root.type == bfd_link_hash_defined
10875 || fdh->elf.root.type == bfd_link_hash_defweak)
10876 {
10877 sym_sec = fdh->elf.root.u.def.section;
10878 sym_value = fdh->elf.root.u.def.value;
10879 if (sym_sec->output_section != NULL)
10880 ok_dest = TRUE;
10881 }
10882 else
10883 fdh = NULL;
10884 }
10885 }
10886 else
10887 {
10888 bfd_set_error (bfd_error_bad_value);
10889 goto error_ret_free_internal;
10890 }
10891
10892 destination = 0;
10893 if (ok_dest)
10894 {
10895 sym_value += irela->r_addend;
10896 destination = (sym_value
10897 + sym_sec->output_offset
10898 + sym_sec->output_section->vma);
10899 }
10900
10901 code_sec = sym_sec;
10902 code_value = sym_value;
10903 opd = get_opd_info (sym_sec);
10904 if (opd != NULL)
10905 {
10906 bfd_vma dest;
10907
10908 if (hash == NULL && opd->adjust != NULL)
10909 {
10910 long adjust = opd->adjust[sym_value / 8];
10911 if (adjust == -1)
10912 continue;
10913 code_value += adjust;
10914 sym_value += adjust;
10915 }
10916 dest = opd_entry_value (sym_sec, sym_value,
10917 &code_sec, &code_value);
10918 if (dest != (bfd_vma) -1)
10919 {
10920 destination = dest;
10921 if (fdh != NULL)
10922 {
10923 /* Fixup old ABI sym to point at code
10924 entry. */
10925 hash->elf.root.type = bfd_link_hash_defweak;
10926 hash->elf.root.u.def.section = code_sec;
10927 hash->elf.root.u.def.value = code_value;
10928 }
10929 }
10930 }
10931
10932 /* Determine what (if any) linker stub is needed. */
10933 plt_ent = NULL;
10934 stub_type = ppc_type_of_stub (section, irela, &hash,
10935 &plt_ent, destination);
10936
10937 if (stub_type != ppc_stub_plt_call)
10938 {
10939 /* Check whether we need a TOC adjusting stub.
10940 Since the linker pastes together pieces from
10941 different object files when creating the
10942 _init and _fini functions, it may be that a
10943 call to what looks like a local sym is in
10944 fact a call needing a TOC adjustment. */
10945 if (code_sec != NULL
10946 && code_sec->output_section != NULL
10947 && (htab->stub_group[code_sec->id].toc_off
10948 != htab->stub_group[section->id].toc_off)
10949 && (code_sec->has_toc_reloc
10950 || code_sec->makes_toc_func_call))
10951 stub_type = ppc_stub_long_branch_r2off;
10952 }
10953
10954 if (stub_type == ppc_stub_none)
10955 continue;
10956
10957 /* __tls_get_addr calls might be eliminated. */
10958 if (stub_type != ppc_stub_plt_call
10959 && hash != NULL
10960 && (hash == htab->tls_get_addr
10961 || hash == htab->tls_get_addr_fd)
10962 && section->has_tls_reloc
10963 && irela != internal_relocs)
10964 {
10965 /* Get tls info. */
10966 unsigned char *tls_mask;
10967
10968 if (!get_tls_mask (&tls_mask, NULL, NULL, &local_syms,
10969 irela - 1, input_bfd))
10970 goto error_ret_free_internal;
10971 if (*tls_mask != 0)
10972 continue;
10973 }
10974
10975 /* Support for grouping stub sections. */
10976 id_sec = htab->stub_group[section->id].link_sec;
10977
10978 /* Get the name of this stub. */
10979 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
10980 if (!stub_name)
10981 goto error_ret_free_internal;
10982
10983 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
10984 stub_name, FALSE, FALSE);
10985 if (stub_entry != NULL)
10986 {
10987 /* The proper stub has already been created. */
10988 free (stub_name);
10989 continue;
10990 }
10991
10992 stub_entry = ppc_add_stub (stub_name, section, htab);
10993 if (stub_entry == NULL)
10994 {
10995 free (stub_name);
10996 error_ret_free_internal:
10997 if (elf_section_data (section)->relocs == NULL)
10998 free (internal_relocs);
10999 error_ret_free_local:
11000 if (local_syms != NULL
11001 && (symtab_hdr->contents
11002 != (unsigned char *) local_syms))
11003 free (local_syms);
11004 return FALSE;
11005 }
11006
11007 stub_entry->stub_type = stub_type;
11008 if (stub_type != ppc_stub_plt_call)
11009 {
11010 stub_entry->target_value = code_value;
11011 stub_entry->target_section = code_sec;
11012 }
11013 else
11014 {
11015 stub_entry->target_value = sym_value;
11016 stub_entry->target_section = sym_sec;
11017 }
11018 stub_entry->h = hash;
11019 stub_entry->plt_ent = plt_ent;
11020 stub_entry->addend = irela->r_addend;
11021
11022 if (stub_entry->h != NULL)
11023 htab->stub_globals += 1;
11024 }
11025
11026 /* We're done with the internal relocs, free them. */
11027 if (elf_section_data (section)->relocs != internal_relocs)
11028 free (internal_relocs);
11029 }
11030
11031 if (local_syms != NULL
11032 && symtab_hdr->contents != (unsigned char *) local_syms)
11033 {
11034 if (!info->keep_memory)
11035 free (local_syms);
11036 else
11037 symtab_hdr->contents = (unsigned char *) local_syms;
11038 }
11039 }
11040
11041 /* We may have added some stubs. Find out the new size of the
11042 stub sections. */
11043 for (stub_sec = htab->stub_bfd->sections;
11044 stub_sec != NULL;
11045 stub_sec = stub_sec->next)
11046 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
11047 {
11048 stub_sec->rawsize = stub_sec->size;
11049 stub_sec->size = 0;
11050 stub_sec->reloc_count = 0;
11051 stub_sec->flags &= ~SEC_RELOC;
11052 }
11053
11054 htab->brlt->size = 0;
11055 htab->brlt->reloc_count = 0;
11056 htab->brlt->flags &= ~SEC_RELOC;
11057 if (htab->relbrlt != NULL)
11058 htab->relbrlt->size = 0;
11059
11060 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
11061
11062 if (info->emitrelocations
11063 && htab->glink != NULL && htab->glink->size != 0)
11064 {
11065 htab->glink->reloc_count = 1;
11066 htab->glink->flags |= SEC_RELOC;
11067 }
11068
11069 for (stub_sec = htab->stub_bfd->sections;
11070 stub_sec != NULL;
11071 stub_sec = stub_sec->next)
11072 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
11073 && stub_sec->rawsize != stub_sec->size)
11074 break;
11075
11076 /* Exit from this loop when no stubs have been added, and no stubs
11077 have changed size. */
11078 if (stub_sec == NULL)
11079 break;
11080
11081 /* Ask the linker to do its stuff. */
11082 (*htab->layout_sections_again) ();
11083 }
11084
11085 /* It would be nice to strip htab->brlt from the output if the
11086 section is empty, but it's too late. If we strip sections here,
11087 the dynamic symbol table is corrupted since the section symbol
11088 for the stripped section isn't written. */
11089
11090 return TRUE;
11091 }
11092
11093 /* Called after we have determined section placement. If sections
11094 move, we'll be called again. Provide a value for TOCstart. */
11095
11096 bfd_vma
11097 ppc64_elf_toc (bfd *obfd)
11098 {
11099 asection *s;
11100 bfd_vma TOCstart;
11101
11102 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
11103 order. The TOC starts where the first of these sections starts. */
11104 s = bfd_get_section_by_name (obfd, ".got");
11105 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
11106 s = bfd_get_section_by_name (obfd, ".toc");
11107 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
11108 s = bfd_get_section_by_name (obfd, ".tocbss");
11109 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
11110 s = bfd_get_section_by_name (obfd, ".plt");
11111 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
11112 {
11113 /* This may happen for
11114 o references to TOC base (SYM@toc / TOC[tc0]) without a
11115 .toc directive
11116 o bad linker script
11117 o --gc-sections and empty TOC sections
11118
11119 FIXME: Warn user? */
11120
11121 /* Look for a likely section. We probably won't even be
11122 using TOCstart. */
11123 for (s = obfd->sections; s != NULL; s = s->next)
11124 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY
11125 | SEC_EXCLUDE))
11126 == (SEC_ALLOC | SEC_SMALL_DATA))
11127 break;
11128 if (s == NULL)
11129 for (s = obfd->sections; s != NULL; s = s->next)
11130 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_EXCLUDE))
11131 == (SEC_ALLOC | SEC_SMALL_DATA))
11132 break;
11133 if (s == NULL)
11134 for (s = obfd->sections; s != NULL; s = s->next)
11135 if ((s->flags & (SEC_ALLOC | SEC_READONLY | SEC_EXCLUDE))
11136 == SEC_ALLOC)
11137 break;
11138 if (s == NULL)
11139 for (s = obfd->sections; s != NULL; s = s->next)
11140 if ((s->flags & (SEC_ALLOC | SEC_EXCLUDE)) == SEC_ALLOC)
11141 break;
11142 }
11143
11144 TOCstart = 0;
11145 if (s != NULL)
11146 TOCstart = s->output_section->vma + s->output_offset;
11147
11148 return TOCstart;
11149 }
11150
11151 /* Build all the stubs associated with the current output file.
11152 The stubs are kept in a hash table attached to the main linker
11153 hash table. This function is called via gldelf64ppc_finish. */
11154
11155 bfd_boolean
11156 ppc64_elf_build_stubs (bfd_boolean emit_stub_syms,
11157 struct bfd_link_info *info,
11158 char **stats)
11159 {
11160 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11161 asection *stub_sec;
11162 bfd_byte *p;
11163 int stub_sec_count = 0;
11164
11165 if (htab == NULL)
11166 return FALSE;
11167
11168 htab->emit_stub_syms = emit_stub_syms;
11169
11170 /* Allocate memory to hold the linker stubs. */
11171 for (stub_sec = htab->stub_bfd->sections;
11172 stub_sec != NULL;
11173 stub_sec = stub_sec->next)
11174 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
11175 && stub_sec->size != 0)
11176 {
11177 stub_sec->contents = bfd_zalloc (htab->stub_bfd, stub_sec->size);
11178 if (stub_sec->contents == NULL)
11179 return FALSE;
11180 /* We want to check that built size is the same as calculated
11181 size. rawsize is a convenient location to use. */
11182 stub_sec->rawsize = stub_sec->size;
11183 stub_sec->size = 0;
11184 }
11185
11186 if (htab->glink != NULL && htab->glink->size != 0)
11187 {
11188 unsigned int indx;
11189 bfd_vma plt0;
11190
11191 /* Build the .glink plt call stub. */
11192 if (htab->emit_stub_syms)
11193 {
11194 struct elf_link_hash_entry *h;
11195 h = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
11196 TRUE, FALSE, FALSE);
11197 if (h == NULL)
11198 return FALSE;
11199 if (h->root.type == bfd_link_hash_new)
11200 {
11201 h->root.type = bfd_link_hash_defined;
11202 h->root.u.def.section = htab->glink;
11203 h->root.u.def.value = 8;
11204 h->ref_regular = 1;
11205 h->def_regular = 1;
11206 h->ref_regular_nonweak = 1;
11207 h->forced_local = 1;
11208 h->non_elf = 0;
11209 }
11210 }
11211 plt0 = htab->plt->output_section->vma + htab->plt->output_offset - 16;
11212 if (info->emitrelocations)
11213 {
11214 Elf_Internal_Rela *r = get_relocs (htab->glink, 1);
11215 if (r == NULL)
11216 return FALSE;
11217 r->r_offset = (htab->glink->output_offset
11218 + htab->glink->output_section->vma);
11219 r->r_info = ELF64_R_INFO (0, R_PPC64_REL64);
11220 r->r_addend = plt0;
11221 }
11222 p = htab->glink->contents;
11223 plt0 -= htab->glink->output_section->vma + htab->glink->output_offset;
11224 bfd_put_64 (htab->glink->owner, plt0, p);
11225 p += 8;
11226 bfd_put_32 (htab->glink->owner, MFLR_R12, p);
11227 p += 4;
11228 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
11229 p += 4;
11230 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
11231 p += 4;
11232 bfd_put_32 (htab->glink->owner, LD_R2_M16R11, p);
11233 p += 4;
11234 bfd_put_32 (htab->glink->owner, MTLR_R12, p);
11235 p += 4;
11236 bfd_put_32 (htab->glink->owner, ADD_R12_R2_R11, p);
11237 p += 4;
11238 bfd_put_32 (htab->glink->owner, LD_R11_0R12, p);
11239 p += 4;
11240 bfd_put_32 (htab->glink->owner, LD_R2_0R12 | 8, p);
11241 p += 4;
11242 bfd_put_32 (htab->glink->owner, MTCTR_R11, p);
11243 p += 4;
11244 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | 16, p);
11245 p += 4;
11246 bfd_put_32 (htab->glink->owner, BCTR, p);
11247 p += 4;
11248 while (p - htab->glink->contents < GLINK_CALL_STUB_SIZE)
11249 {
11250 bfd_put_32 (htab->glink->owner, NOP, p);
11251 p += 4;
11252 }
11253
11254 /* Build the .glink lazy link call stubs. */
11255 indx = 0;
11256 while (p < htab->glink->contents + htab->glink->size)
11257 {
11258 if (indx < 0x8000)
11259 {
11260 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
11261 p += 4;
11262 }
11263 else
11264 {
11265 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
11266 p += 4;
11267 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx), p);
11268 p += 4;
11269 }
11270 bfd_put_32 (htab->glink->owner,
11271 B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p);
11272 indx++;
11273 p += 4;
11274 }
11275 htab->glink->rawsize = p - htab->glink->contents;
11276 }
11277
11278 if (htab->brlt->size != 0)
11279 {
11280 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
11281 htab->brlt->size);
11282 if (htab->brlt->contents == NULL)
11283 return FALSE;
11284 }
11285 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
11286 {
11287 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
11288 htab->relbrlt->size);
11289 if (htab->relbrlt->contents == NULL)
11290 return FALSE;
11291 }
11292
11293 /* Build the stubs as directed by the stub hash table. */
11294 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
11295
11296 if (htab->relbrlt != NULL)
11297 htab->relbrlt->reloc_count = 0;
11298
11299 for (stub_sec = htab->stub_bfd->sections;
11300 stub_sec != NULL;
11301 stub_sec = stub_sec->next)
11302 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
11303 {
11304 stub_sec_count += 1;
11305 if (stub_sec->rawsize != stub_sec->size)
11306 break;
11307 }
11308
11309 if (stub_sec != NULL
11310 || htab->glink->rawsize != htab->glink->size)
11311 {
11312 htab->stub_error = TRUE;
11313 (*_bfd_error_handler) (_("stubs don't match calculated size"));
11314 }
11315
11316 if (htab->stub_error)
11317 return FALSE;
11318
11319 if (stats != NULL)
11320 {
11321 *stats = bfd_malloc (500);
11322 if (*stats == NULL)
11323 return FALSE;
11324
11325 sprintf (*stats, _("linker stubs in %u group%s\n"
11326 " branch %lu\n"
11327 " toc adjust %lu\n"
11328 " long branch %lu\n"
11329 " long toc adj %lu\n"
11330 " plt call %lu"),
11331 stub_sec_count,
11332 stub_sec_count == 1 ? "" : "s",
11333 htab->stub_count[ppc_stub_long_branch - 1],
11334 htab->stub_count[ppc_stub_long_branch_r2off - 1],
11335 htab->stub_count[ppc_stub_plt_branch - 1],
11336 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
11337 htab->stub_count[ppc_stub_plt_call - 1]);
11338 }
11339 return TRUE;
11340 }
11341
11342 /* This function undoes the changes made by add_symbol_adjust. */
11343
11344 static bfd_boolean
11345 undo_symbol_twiddle (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
11346 {
11347 struct ppc_link_hash_entry *eh;
11348
11349 if (h->root.type == bfd_link_hash_indirect)
11350 return TRUE;
11351
11352 if (h->root.type == bfd_link_hash_warning)
11353 h = (struct elf_link_hash_entry *) h->root.u.i.link;
11354
11355 eh = (struct ppc_link_hash_entry *) h;
11356 if (eh->elf.root.type != bfd_link_hash_undefweak || !eh->was_undefined)
11357 return TRUE;
11358
11359 eh->elf.root.type = bfd_link_hash_undefined;
11360 return TRUE;
11361 }
11362
11363 void
11364 ppc64_elf_restore_symbols (struct bfd_link_info *info)
11365 {
11366 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11367
11368 if (htab != NULL)
11369 elf_link_hash_traverse (&htab->elf, undo_symbol_twiddle, info);
11370 }
11371
11372 /* What to do when ld finds relocations against symbols defined in
11373 discarded sections. */
11374
11375 static unsigned int
11376 ppc64_elf_action_discarded (asection *sec)
11377 {
11378 if (strcmp (".opd", sec->name) == 0)
11379 return 0;
11380
11381 if (strcmp (".toc", sec->name) == 0)
11382 return 0;
11383
11384 if (strcmp (".toc1", sec->name) == 0)
11385 return 0;
11386
11387 return _bfd_elf_default_action_discarded (sec);
11388 }
11389
11390 /* REL points to a low-part reloc on a largetoc instruction sequence.
11391 Find the matching high-part reloc instruction and verify that it
11392 is addis REG,r2,x. If so, return a pointer to the high-part reloc. */
11393
11394 static const Elf_Internal_Rela *
11395 ha_reloc_match (const Elf_Internal_Rela *relocs,
11396 const Elf_Internal_Rela *rel,
11397 unsigned int reg,
11398 const bfd *input_bfd,
11399 const bfd_byte *contents)
11400 {
11401 enum elf_ppc64_reloc_type r_type, r_type_ha;
11402 bfd_vma r_info_ha, r_addend;
11403
11404 r_type = ELF64_R_TYPE (rel->r_info);
11405 switch (r_type)
11406 {
11407 case R_PPC64_GOT_TLSLD16_LO:
11408 case R_PPC64_GOT_TLSGD16_LO:
11409 case R_PPC64_GOT_TPREL16_LO_DS:
11410 case R_PPC64_GOT_DTPREL16_LO_DS:
11411 case R_PPC64_GOT16_LO:
11412 case R_PPC64_TOC16_LO:
11413 r_type_ha = r_type + 2;
11414 break;
11415 case R_PPC64_GOT16_LO_DS:
11416 r_type_ha = R_PPC64_GOT16_HA;
11417 break;
11418 case R_PPC64_TOC16_LO_DS:
11419 r_type_ha = R_PPC64_TOC16_HA;
11420 break;
11421 default:
11422 abort ();
11423 }
11424 r_info_ha = ELF64_R_INFO (ELF64_R_SYM (rel->r_info), r_type_ha);
11425 r_addend = rel->r_addend;
11426
11427 while (--rel >= relocs)
11428 if (rel->r_info == r_info_ha
11429 && rel->r_addend == r_addend)
11430 {
11431 const bfd_byte *p = contents + (rel->r_offset & ~3);
11432 unsigned int insn = bfd_get_32 (input_bfd, p);
11433 if ((insn & ((0x3f << 26) | (0x1f << 16)))
11434 == ((15u << 26) | (2 << 16)) /* addis rt,r2,x */
11435 && (insn & (0x1f << 21)) == (reg << 21))
11436 return rel;
11437 break;
11438 }
11439 return NULL;
11440 }
11441
11442 /* The RELOCATE_SECTION function is called by the ELF backend linker
11443 to handle the relocations for a section.
11444
11445 The relocs are always passed as Rela structures; if the section
11446 actually uses Rel structures, the r_addend field will always be
11447 zero.
11448
11449 This function is responsible for adjust the section contents as
11450 necessary, and (if using Rela relocs and generating a
11451 relocatable output file) adjusting the reloc addend as
11452 necessary.
11453
11454 This function does not have to worry about setting the reloc
11455 address or the reloc symbol index.
11456
11457 LOCAL_SYMS is a pointer to the swapped in local symbols.
11458
11459 LOCAL_SECTIONS is an array giving the section in the input file
11460 corresponding to the st_shndx field of each local symbol.
11461
11462 The global hash table entry for the global symbols can be found
11463 via elf_sym_hashes (input_bfd).
11464
11465 When generating relocatable output, this function must handle
11466 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
11467 going to be the section symbol corresponding to the output
11468 section, which means that the addend must be adjusted
11469 accordingly. */
11470
11471 static bfd_boolean
11472 ppc64_elf_relocate_section (bfd *output_bfd,
11473 struct bfd_link_info *info,
11474 bfd *input_bfd,
11475 asection *input_section,
11476 bfd_byte *contents,
11477 Elf_Internal_Rela *relocs,
11478 Elf_Internal_Sym *local_syms,
11479 asection **local_sections)
11480 {
11481 struct ppc_link_hash_table *htab;
11482 Elf_Internal_Shdr *symtab_hdr;
11483 struct elf_link_hash_entry **sym_hashes;
11484 Elf_Internal_Rela *rel;
11485 Elf_Internal_Rela *relend;
11486 Elf_Internal_Rela outrel;
11487 bfd_byte *loc;
11488 struct got_entry **local_got_ents;
11489 bfd_vma TOCstart;
11490 bfd_boolean ret = TRUE;
11491 bfd_boolean is_opd;
11492 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
11493 bfd_boolean is_power4 = FALSE;
11494 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
11495
11496 /* Initialize howto table if needed. */
11497 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
11498 ppc_howto_init ();
11499
11500 htab = ppc_hash_table (info);
11501 if (htab == NULL)
11502 return FALSE;
11503
11504 /* Don't relocate stub sections. */
11505 if (input_section->owner == htab->stub_bfd)
11506 return TRUE;
11507
11508 BFD_ASSERT (is_ppc64_elf (input_bfd));
11509
11510 local_got_ents = elf_local_got_ents (input_bfd);
11511 TOCstart = elf_gp (output_bfd);
11512 symtab_hdr = &elf_symtab_hdr (input_bfd);
11513 sym_hashes = elf_sym_hashes (input_bfd);
11514 is_opd = ppc64_elf_section_data (input_section)->sec_type == sec_opd;
11515
11516 rel = relocs;
11517 relend = relocs + input_section->reloc_count;
11518 for (; rel < relend; rel++)
11519 {
11520 enum elf_ppc64_reloc_type r_type;
11521 bfd_vma addend, orig_addend;
11522 bfd_reloc_status_type r;
11523 Elf_Internal_Sym *sym;
11524 asection *sec;
11525 struct elf_link_hash_entry *h_elf;
11526 struct ppc_link_hash_entry *h;
11527 struct ppc_link_hash_entry *fdh;
11528 const char *sym_name;
11529 unsigned long r_symndx, toc_symndx;
11530 bfd_vma toc_addend;
11531 unsigned char tls_mask, tls_gd, tls_type;
11532 unsigned char sym_type;
11533 bfd_vma relocation;
11534 bfd_boolean unresolved_reloc;
11535 bfd_boolean warned;
11536 unsigned int insn;
11537 bfd_vma mask;
11538 struct ppc_stub_hash_entry *stub_entry;
11539 bfd_vma max_br_offset;
11540 bfd_vma from;
11541
11542 r_type = ELF64_R_TYPE (rel->r_info);
11543 r_symndx = ELF64_R_SYM (rel->r_info);
11544
11545 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
11546 symbol of the previous ADDR64 reloc. The symbol gives us the
11547 proper TOC base to use. */
11548 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
11549 && rel != relocs
11550 && ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_ADDR64
11551 && is_opd)
11552 r_symndx = ELF64_R_SYM (rel[-1].r_info);
11553
11554 sym = NULL;
11555 sec = NULL;
11556 h_elf = NULL;
11557 sym_name = NULL;
11558 unresolved_reloc = FALSE;
11559 warned = FALSE;
11560 orig_addend = rel->r_addend;
11561
11562 if (r_symndx < symtab_hdr->sh_info)
11563 {
11564 /* It's a local symbol. */
11565 struct _opd_sec_data *opd;
11566
11567 sym = local_syms + r_symndx;
11568 sec = local_sections[r_symndx];
11569 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
11570 sym_type = ELF64_ST_TYPE (sym->st_info);
11571 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
11572 opd = get_opd_info (sec);
11573 if (opd != NULL && opd->adjust != NULL)
11574 {
11575 long adjust = opd->adjust[(sym->st_value + rel->r_addend) / 8];
11576 if (adjust == -1)
11577 relocation = 0;
11578 else
11579 {
11580 /* If this is a relocation against the opd section sym
11581 and we have edited .opd, adjust the reloc addend so
11582 that ld -r and ld --emit-relocs output is correct.
11583 If it is a reloc against some other .opd symbol,
11584 then the symbol value will be adjusted later. */
11585 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
11586 rel->r_addend += adjust;
11587 else
11588 relocation += adjust;
11589 }
11590 }
11591 }
11592 else
11593 {
11594 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
11595 r_symndx, symtab_hdr, sym_hashes,
11596 h_elf, sec, relocation,
11597 unresolved_reloc, warned);
11598 sym_name = h_elf->root.root.string;
11599 sym_type = h_elf->type;
11600 }
11601 h = (struct ppc_link_hash_entry *) h_elf;
11602
11603 if (sec != NULL && elf_discarded_section (sec))
11604 {
11605 /* For relocs against symbols from removed linkonce sections,
11606 or sections discarded by a linker script, we just want the
11607 section contents zeroed. Avoid any special processing. */
11608 _bfd_clear_contents (ppc64_elf_howto_table[r_type], input_bfd,
11609 contents + rel->r_offset);
11610 rel->r_info = 0;
11611 rel->r_addend = 0;
11612 continue;
11613 }
11614
11615 if (info->relocatable)
11616 continue;
11617
11618 /* TLS optimizations. Replace instruction sequences and relocs
11619 based on information we collected in tls_optimize. We edit
11620 RELOCS so that --emit-relocs will output something sensible
11621 for the final instruction stream. */
11622 tls_mask = 0;
11623 tls_gd = 0;
11624 toc_symndx = 0;
11625 if (h != NULL)
11626 tls_mask = h->tls_mask;
11627 else if (local_got_ents != NULL)
11628 {
11629 struct plt_entry **local_plt = (struct plt_entry **)
11630 (local_got_ents + symtab_hdr->sh_info);
11631 unsigned char *lgot_masks = (unsigned char *)
11632 (local_plt + symtab_hdr->sh_info);
11633 tls_mask = lgot_masks[r_symndx];
11634 }
11635 if (tls_mask == 0
11636 && (r_type == R_PPC64_TLS
11637 || r_type == R_PPC64_TLSGD
11638 || r_type == R_PPC64_TLSLD))
11639 {
11640 /* Check for toc tls entries. */
11641 unsigned char *toc_tls;
11642
11643 if (!get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
11644 &local_syms, rel, input_bfd))
11645 return FALSE;
11646
11647 if (toc_tls)
11648 tls_mask = *toc_tls;
11649 }
11650
11651 /* Check that tls relocs are used with tls syms, and non-tls
11652 relocs are used with non-tls syms. */
11653 if (r_symndx != 0
11654 && r_type != R_PPC64_NONE
11655 && (h == NULL
11656 || h->elf.root.type == bfd_link_hash_defined
11657 || h->elf.root.type == bfd_link_hash_defweak)
11658 && (IS_PPC64_TLS_RELOC (r_type)
11659 != (sym_type == STT_TLS
11660 || (sym_type == STT_SECTION
11661 && (sec->flags & SEC_THREAD_LOCAL) != 0))))
11662 {
11663 if (tls_mask != 0
11664 && (r_type == R_PPC64_TLS
11665 || r_type == R_PPC64_TLSGD
11666 || r_type == R_PPC64_TLSLD))
11667 /* R_PPC64_TLS is OK against a symbol in the TOC. */
11668 ;
11669 else
11670 (*_bfd_error_handler)
11671 (!IS_PPC64_TLS_RELOC (r_type)
11672 ? _("%B(%A+0x%lx): %s used with TLS symbol %s")
11673 : _("%B(%A+0x%lx): %s used with non-TLS symbol %s"),
11674 input_bfd,
11675 input_section,
11676 (long) rel->r_offset,
11677 ppc64_elf_howto_table[r_type]->name,
11678 sym_name);
11679 }
11680
11681 /* Ensure reloc mapping code below stays sane. */
11682 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
11683 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
11684 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
11685 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
11686 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
11687 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
11688 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
11689 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
11690 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
11691 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
11692 abort ();
11693
11694 switch (r_type)
11695 {
11696 default:
11697 break;
11698
11699 case R_PPC64_LO_DS_OPT:
11700 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
11701 if ((insn & (0x3f << 26)) != 58u << 26)
11702 abort ();
11703 insn += (14u << 26) - (58u << 26);
11704 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
11705 r_type = R_PPC64_TOC16_LO;
11706 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11707 break;
11708
11709 case R_PPC64_TOC16:
11710 case R_PPC64_TOC16_LO:
11711 case R_PPC64_TOC16_DS:
11712 case R_PPC64_TOC16_LO_DS:
11713 {
11714 /* Check for toc tls entries. */
11715 unsigned char *toc_tls;
11716 int retval;
11717
11718 retval = get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
11719 &local_syms, rel, input_bfd);
11720 if (retval == 0)
11721 return FALSE;
11722
11723 if (toc_tls)
11724 {
11725 tls_mask = *toc_tls;
11726 if (r_type == R_PPC64_TOC16_DS
11727 || r_type == R_PPC64_TOC16_LO_DS)
11728 {
11729 if (tls_mask != 0
11730 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
11731 goto toctprel;
11732 }
11733 else
11734 {
11735 /* If we found a GD reloc pair, then we might be
11736 doing a GD->IE transition. */
11737 if (retval == 2)
11738 {
11739 tls_gd = TLS_TPRELGD;
11740 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
11741 goto tls_ldgd_opt;
11742 }
11743 else if (retval == 3)
11744 {
11745 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
11746 goto tls_ldgd_opt;
11747 }
11748 }
11749 }
11750 }
11751 break;
11752
11753 case R_PPC64_GOT_TPREL16_HI:
11754 case R_PPC64_GOT_TPREL16_HA:
11755 if (tls_mask != 0
11756 && (tls_mask & TLS_TPREL) == 0)
11757 {
11758 rel->r_offset -= d_offset;
11759 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
11760 r_type = R_PPC64_NONE;
11761 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11762 }
11763 break;
11764
11765 case R_PPC64_GOT_TPREL16_DS:
11766 case R_PPC64_GOT_TPREL16_LO_DS:
11767 if (tls_mask != 0
11768 && (tls_mask & TLS_TPREL) == 0)
11769 {
11770 toctprel:
11771 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
11772 insn &= 31 << 21;
11773 insn |= 0x3c0d0000; /* addis 0,13,0 */
11774 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
11775 r_type = R_PPC64_TPREL16_HA;
11776 if (toc_symndx != 0)
11777 {
11778 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
11779 rel->r_addend = toc_addend;
11780 /* We changed the symbol. Start over in order to
11781 get h, sym, sec etc. right. */
11782 rel--;
11783 continue;
11784 }
11785 else
11786 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11787 }
11788 break;
11789
11790 case R_PPC64_TLS:
11791 if (tls_mask != 0
11792 && (tls_mask & TLS_TPREL) == 0)
11793 {
11794 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
11795 insn = _bfd_elf_ppc_at_tls_transform (insn, 13);
11796 if (insn == 0)
11797 abort ();
11798 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
11799 /* Was PPC64_TLS which sits on insn boundary, now
11800 PPC64_TPREL16_LO which is at low-order half-word. */
11801 rel->r_offset += d_offset;
11802 r_type = R_PPC64_TPREL16_LO;
11803 if (toc_symndx != 0)
11804 {
11805 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
11806 rel->r_addend = toc_addend;
11807 /* We changed the symbol. Start over in order to
11808 get h, sym, sec etc. right. */
11809 rel--;
11810 continue;
11811 }
11812 else
11813 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11814 }
11815 break;
11816
11817 case R_PPC64_GOT_TLSGD16_HI:
11818 case R_PPC64_GOT_TLSGD16_HA:
11819 tls_gd = TLS_TPRELGD;
11820 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
11821 goto tls_gdld_hi;
11822 break;
11823
11824 case R_PPC64_GOT_TLSLD16_HI:
11825 case R_PPC64_GOT_TLSLD16_HA:
11826 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
11827 {
11828 tls_gdld_hi:
11829 if ((tls_mask & tls_gd) != 0)
11830 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
11831 + R_PPC64_GOT_TPREL16_DS);
11832 else
11833 {
11834 rel->r_offset -= d_offset;
11835 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
11836 r_type = R_PPC64_NONE;
11837 }
11838 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11839 }
11840 break;
11841
11842 case R_PPC64_GOT_TLSGD16:
11843 case R_PPC64_GOT_TLSGD16_LO:
11844 tls_gd = TLS_TPRELGD;
11845 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
11846 goto tls_ldgd_opt;
11847 break;
11848
11849 case R_PPC64_GOT_TLSLD16:
11850 case R_PPC64_GOT_TLSLD16_LO:
11851 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
11852 {
11853 unsigned int insn1, insn2, insn3;
11854 bfd_vma offset;
11855
11856 tls_ldgd_opt:
11857 offset = (bfd_vma) -1;
11858 /* If not using the newer R_PPC64_TLSGD/LD to mark
11859 __tls_get_addr calls, we must trust that the call
11860 stays with its arg setup insns, ie. that the next
11861 reloc is the __tls_get_addr call associated with
11862 the current reloc. Edit both insns. */
11863 if (input_section->has_tls_get_addr_call
11864 && rel + 1 < relend
11865 && branch_reloc_hash_match (input_bfd, rel + 1,
11866 htab->tls_get_addr,
11867 htab->tls_get_addr_fd))
11868 offset = rel[1].r_offset;
11869 if ((tls_mask & tls_gd) != 0)
11870 {
11871 /* IE */
11872 insn1 = bfd_get_32 (output_bfd,
11873 contents + rel->r_offset - d_offset);
11874 insn1 &= (1 << 26) - (1 << 2);
11875 insn1 |= 58 << 26; /* ld */
11876 insn2 = 0x7c636a14; /* add 3,3,13 */
11877 if (offset != (bfd_vma) -1)
11878 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
11879 if ((tls_mask & TLS_EXPLICIT) == 0)
11880 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
11881 + R_PPC64_GOT_TPREL16_DS);
11882 else
11883 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
11884 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11885 }
11886 else
11887 {
11888 /* LE */
11889 insn1 = 0x3c6d0000; /* addis 3,13,0 */
11890 insn2 = 0x38630000; /* addi 3,3,0 */
11891 if (tls_gd == 0)
11892 {
11893 /* Was an LD reloc. */
11894 if (toc_symndx)
11895 sec = local_sections[toc_symndx];
11896 for (r_symndx = 0;
11897 r_symndx < symtab_hdr->sh_info;
11898 r_symndx++)
11899 if (local_sections[r_symndx] == sec)
11900 break;
11901 if (r_symndx >= symtab_hdr->sh_info)
11902 r_symndx = 0;
11903 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
11904 if (r_symndx != 0)
11905 rel->r_addend -= (local_syms[r_symndx].st_value
11906 + sec->output_offset
11907 + sec->output_section->vma);
11908 }
11909 else if (toc_symndx != 0)
11910 {
11911 r_symndx = toc_symndx;
11912 rel->r_addend = toc_addend;
11913 }
11914 r_type = R_PPC64_TPREL16_HA;
11915 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11916 if (offset != (bfd_vma) -1)
11917 {
11918 rel[1].r_info = ELF64_R_INFO (r_symndx,
11919 R_PPC64_TPREL16_LO);
11920 rel[1].r_offset = offset + d_offset;
11921 rel[1].r_addend = rel->r_addend;
11922 }
11923 }
11924 bfd_put_32 (output_bfd, insn1,
11925 contents + rel->r_offset - d_offset);
11926 if (offset != (bfd_vma) -1)
11927 {
11928 insn3 = bfd_get_32 (output_bfd,
11929 contents + offset + 4);
11930 if (insn3 == NOP
11931 || insn3 == CROR_151515 || insn3 == CROR_313131)
11932 {
11933 rel[1].r_offset += 4;
11934 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
11935 insn2 = NOP;
11936 }
11937 bfd_put_32 (output_bfd, insn2, contents + offset);
11938 }
11939 if ((tls_mask & tls_gd) == 0
11940 && (tls_gd == 0 || toc_symndx != 0))
11941 {
11942 /* We changed the symbol. Start over in order
11943 to get h, sym, sec etc. right. */
11944 rel--;
11945 continue;
11946 }
11947 }
11948 break;
11949
11950 case R_PPC64_TLSGD:
11951 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
11952 {
11953 unsigned int insn2, insn3;
11954 bfd_vma offset = rel->r_offset;
11955
11956 if ((tls_mask & TLS_TPRELGD) != 0)
11957 {
11958 /* IE */
11959 r_type = R_PPC64_NONE;
11960 insn2 = 0x7c636a14; /* add 3,3,13 */
11961 }
11962 else
11963 {
11964 /* LE */
11965 if (toc_symndx != 0)
11966 {
11967 r_symndx = toc_symndx;
11968 rel->r_addend = toc_addend;
11969 }
11970 r_type = R_PPC64_TPREL16_LO;
11971 rel->r_offset = offset + d_offset;
11972 insn2 = 0x38630000; /* addi 3,3,0 */
11973 }
11974 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11975 /* Zap the reloc on the _tls_get_addr call too. */
11976 BFD_ASSERT (offset == rel[1].r_offset);
11977 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
11978 insn3 = bfd_get_32 (output_bfd,
11979 contents + offset + 4);
11980 if (insn3 == NOP
11981 || insn3 == CROR_151515 || insn3 == CROR_313131)
11982 {
11983 rel->r_offset += 4;
11984 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
11985 insn2 = NOP;
11986 }
11987 bfd_put_32 (output_bfd, insn2, contents + offset);
11988 if ((tls_mask & TLS_TPRELGD) == 0 && toc_symndx != 0)
11989 {
11990 rel--;
11991 continue;
11992 }
11993 }
11994 break;
11995
11996 case R_PPC64_TLSLD:
11997 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
11998 {
11999 unsigned int insn2, insn3;
12000 bfd_vma offset = rel->r_offset;
12001
12002 if (toc_symndx)
12003 sec = local_sections[toc_symndx];
12004 for (r_symndx = 0;
12005 r_symndx < symtab_hdr->sh_info;
12006 r_symndx++)
12007 if (local_sections[r_symndx] == sec)
12008 break;
12009 if (r_symndx >= symtab_hdr->sh_info)
12010 r_symndx = 0;
12011 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
12012 if (r_symndx != 0)
12013 rel->r_addend -= (local_syms[r_symndx].st_value
12014 + sec->output_offset
12015 + sec->output_section->vma);
12016
12017 r_type = R_PPC64_TPREL16_LO;
12018 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12019 rel->r_offset = offset + d_offset;
12020 /* Zap the reloc on the _tls_get_addr call too. */
12021 BFD_ASSERT (offset == rel[1].r_offset);
12022 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
12023 insn2 = 0x38630000; /* addi 3,3,0 */
12024 insn3 = bfd_get_32 (output_bfd,
12025 contents + offset + 4);
12026 if (insn3 == NOP
12027 || insn3 == CROR_151515 || insn3 == CROR_313131)
12028 {
12029 rel->r_offset += 4;
12030 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
12031 insn2 = NOP;
12032 }
12033 bfd_put_32 (output_bfd, insn2, contents + offset);
12034 rel--;
12035 continue;
12036 }
12037 break;
12038
12039 case R_PPC64_DTPMOD64:
12040 if (rel + 1 < relend
12041 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
12042 && rel[1].r_offset == rel->r_offset + 8)
12043 {
12044 if ((tls_mask & TLS_GD) == 0)
12045 {
12046 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
12047 if ((tls_mask & TLS_TPRELGD) != 0)
12048 r_type = R_PPC64_TPREL64;
12049 else
12050 {
12051 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
12052 r_type = R_PPC64_NONE;
12053 }
12054 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12055 }
12056 }
12057 else
12058 {
12059 if ((tls_mask & TLS_LD) == 0)
12060 {
12061 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
12062 r_type = R_PPC64_NONE;
12063 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12064 }
12065 }
12066 break;
12067
12068 case R_PPC64_TPREL64:
12069 if ((tls_mask & TLS_TPREL) == 0)
12070 {
12071 r_type = R_PPC64_NONE;
12072 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12073 }
12074 break;
12075 }
12076
12077 /* Handle other relocations that tweak non-addend part of insn. */
12078 insn = 0;
12079 max_br_offset = 1 << 25;
12080 addend = rel->r_addend;
12081 switch (r_type)
12082 {
12083 default:
12084 break;
12085
12086 /* Branch taken prediction relocations. */
12087 case R_PPC64_ADDR14_BRTAKEN:
12088 case R_PPC64_REL14_BRTAKEN:
12089 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
12090 /* Fall thru. */
12091
12092 /* Branch not taken prediction relocations. */
12093 case R_PPC64_ADDR14_BRNTAKEN:
12094 case R_PPC64_REL14_BRNTAKEN:
12095 insn |= bfd_get_32 (output_bfd,
12096 contents + rel->r_offset) & ~(0x01 << 21);
12097 /* Fall thru. */
12098
12099 case R_PPC64_REL14:
12100 max_br_offset = 1 << 15;
12101 /* Fall thru. */
12102
12103 case R_PPC64_REL24:
12104 /* Calls to functions with a different TOC, such as calls to
12105 shared objects, need to alter the TOC pointer. This is
12106 done using a linkage stub. A REL24 branching to these
12107 linkage stubs needs to be followed by a nop, as the nop
12108 will be replaced with an instruction to restore the TOC
12109 base pointer. */
12110 fdh = h;
12111 if (h != NULL
12112 && h->oh != NULL
12113 && h->oh->is_func_descriptor)
12114 fdh = ppc_follow_link (h->oh);
12115 stub_entry = ppc_get_stub_entry (input_section, sec, fdh, rel, htab);
12116 if (stub_entry != NULL
12117 && (stub_entry->stub_type == ppc_stub_plt_call
12118 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
12119 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
12120 {
12121 bfd_boolean can_plt_call = FALSE;
12122
12123 if (rel->r_offset + 8 <= input_section->size)
12124 {
12125 unsigned long nop;
12126 nop = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
12127 if (nop == NOP
12128 || nop == CROR_151515 || nop == CROR_313131)
12129 {
12130 if (h != NULL
12131 && (h == htab->tls_get_addr_fd
12132 || h == htab->tls_get_addr)
12133 && !htab->no_tls_get_addr_opt)
12134 {
12135 /* Special stub used, leave nop alone. */
12136 }
12137 else
12138 bfd_put_32 (input_bfd, LD_R2_40R1,
12139 contents + rel->r_offset + 4);
12140 can_plt_call = TRUE;
12141 }
12142 }
12143
12144 if (!can_plt_call)
12145 {
12146 if (stub_entry->stub_type == ppc_stub_plt_call)
12147 {
12148 /* If this is a plain branch rather than a branch
12149 and link, don't require a nop. However, don't
12150 allow tail calls in a shared library as they
12151 will result in r2 being corrupted. */
12152 unsigned long br;
12153 br = bfd_get_32 (input_bfd, contents + rel->r_offset);
12154 if (info->executable && (br & 1) == 0)
12155 can_plt_call = TRUE;
12156 else
12157 stub_entry = NULL;
12158 }
12159 else if (h != NULL
12160 && strcmp (h->elf.root.root.string,
12161 ".__libc_start_main") == 0)
12162 {
12163 /* Allow crt1 branch to go via a toc adjusting stub. */
12164 can_plt_call = TRUE;
12165 }
12166 else
12167 {
12168 if (strcmp (input_section->output_section->name,
12169 ".init") == 0
12170 || strcmp (input_section->output_section->name,
12171 ".fini") == 0)
12172 (*_bfd_error_handler)
12173 (_("%B(%A+0x%lx): automatic multiple TOCs "
12174 "not supported using your crt files; "
12175 "recompile with -mminimal-toc or upgrade gcc"),
12176 input_bfd,
12177 input_section,
12178 (long) rel->r_offset);
12179 else
12180 (*_bfd_error_handler)
12181 (_("%B(%A+0x%lx): sibling call optimization to `%s' "
12182 "does not allow automatic multiple TOCs; "
12183 "recompile with -mminimal-toc or "
12184 "-fno-optimize-sibling-calls, "
12185 "or make `%s' extern"),
12186 input_bfd,
12187 input_section,
12188 (long) rel->r_offset,
12189 sym_name,
12190 sym_name);
12191 bfd_set_error (bfd_error_bad_value);
12192 ret = FALSE;
12193 }
12194 }
12195
12196 if (can_plt_call
12197 && stub_entry->stub_type == ppc_stub_plt_call)
12198 unresolved_reloc = FALSE;
12199 }
12200
12201 if ((stub_entry == NULL
12202 || stub_entry->stub_type == ppc_stub_long_branch
12203 || stub_entry->stub_type == ppc_stub_plt_branch)
12204 && get_opd_info (sec) != NULL)
12205 {
12206 /* The branch destination is the value of the opd entry. */
12207 bfd_vma off = (relocation + addend
12208 - sec->output_section->vma
12209 - sec->output_offset);
12210 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL);
12211 if (dest != (bfd_vma) -1)
12212 {
12213 relocation = dest;
12214 addend = 0;
12215 }
12216 }
12217
12218 /* If the branch is out of reach we ought to have a long
12219 branch stub. */
12220 from = (rel->r_offset
12221 + input_section->output_offset
12222 + input_section->output_section->vma);
12223
12224 if (stub_entry != NULL
12225 && (stub_entry->stub_type == ppc_stub_long_branch
12226 || stub_entry->stub_type == ppc_stub_plt_branch)
12227 && (r_type == R_PPC64_ADDR14_BRTAKEN
12228 || r_type == R_PPC64_ADDR14_BRNTAKEN
12229 || (relocation + addend - from + max_br_offset
12230 < 2 * max_br_offset)))
12231 /* Don't use the stub if this branch is in range. */
12232 stub_entry = NULL;
12233
12234 if (stub_entry != NULL)
12235 {
12236 /* Munge up the value and addend so that we call the stub
12237 rather than the procedure directly. */
12238 relocation = (stub_entry->stub_offset
12239 + stub_entry->stub_sec->output_offset
12240 + stub_entry->stub_sec->output_section->vma);
12241 addend = 0;
12242 }
12243
12244 if (insn != 0)
12245 {
12246 if (is_power4)
12247 {
12248 /* Set 'a' bit. This is 0b00010 in BO field for branch
12249 on CR(BI) insns (BO == 001at or 011at), and 0b01000
12250 for branch on CTR insns (BO == 1a00t or 1a01t). */
12251 if ((insn & (0x14 << 21)) == (0x04 << 21))
12252 insn |= 0x02 << 21;
12253 else if ((insn & (0x14 << 21)) == (0x10 << 21))
12254 insn |= 0x08 << 21;
12255 else
12256 break;
12257 }
12258 else
12259 {
12260 /* Invert 'y' bit if not the default. */
12261 if ((bfd_signed_vma) (relocation + addend - from) < 0)
12262 insn ^= 0x01 << 21;
12263 }
12264
12265 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
12266 }
12267
12268 /* NOP out calls to undefined weak functions.
12269 We can thus call a weak function without first
12270 checking whether the function is defined. */
12271 else if (h != NULL
12272 && h->elf.root.type == bfd_link_hash_undefweak
12273 && h->elf.dynindx == -1
12274 && r_type == R_PPC64_REL24
12275 && relocation == 0
12276 && addend == 0)
12277 {
12278 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
12279 continue;
12280 }
12281 break;
12282 }
12283
12284 /* Set `addend'. */
12285 tls_type = 0;
12286 switch (r_type)
12287 {
12288 default:
12289 (*_bfd_error_handler)
12290 (_("%B: unknown relocation type %d for symbol %s"),
12291 input_bfd, (int) r_type, sym_name);
12292
12293 bfd_set_error (bfd_error_bad_value);
12294 ret = FALSE;
12295 continue;
12296
12297 case R_PPC64_NONE:
12298 case R_PPC64_TLS:
12299 case R_PPC64_TLSGD:
12300 case R_PPC64_TLSLD:
12301 case R_PPC64_GNU_VTINHERIT:
12302 case R_PPC64_GNU_VTENTRY:
12303 continue;
12304
12305 /* GOT16 relocations. Like an ADDR16 using the symbol's
12306 address in the GOT as relocation value instead of the
12307 symbol's value itself. Also, create a GOT entry for the
12308 symbol and put the symbol value there. */
12309 case R_PPC64_GOT_TLSGD16:
12310 case R_PPC64_GOT_TLSGD16_LO:
12311 case R_PPC64_GOT_TLSGD16_HI:
12312 case R_PPC64_GOT_TLSGD16_HA:
12313 tls_type = TLS_TLS | TLS_GD;
12314 goto dogot;
12315
12316 case R_PPC64_GOT_TLSLD16:
12317 case R_PPC64_GOT_TLSLD16_LO:
12318 case R_PPC64_GOT_TLSLD16_HI:
12319 case R_PPC64_GOT_TLSLD16_HA:
12320 tls_type = TLS_TLS | TLS_LD;
12321 goto dogot;
12322
12323 case R_PPC64_GOT_TPREL16_DS:
12324 case R_PPC64_GOT_TPREL16_LO_DS:
12325 case R_PPC64_GOT_TPREL16_HI:
12326 case R_PPC64_GOT_TPREL16_HA:
12327 tls_type = TLS_TLS | TLS_TPREL;
12328 goto dogot;
12329
12330 case R_PPC64_GOT_DTPREL16_DS:
12331 case R_PPC64_GOT_DTPREL16_LO_DS:
12332 case R_PPC64_GOT_DTPREL16_HI:
12333 case R_PPC64_GOT_DTPREL16_HA:
12334 tls_type = TLS_TLS | TLS_DTPREL;
12335 goto dogot;
12336
12337 case R_PPC64_GOT16:
12338 case R_PPC64_GOT16_LO:
12339 case R_PPC64_GOT16_HI:
12340 case R_PPC64_GOT16_HA:
12341 case R_PPC64_GOT16_DS:
12342 case R_PPC64_GOT16_LO_DS:
12343 dogot:
12344 {
12345 /* Relocation is to the entry for this symbol in the global
12346 offset table. */
12347 asection *got;
12348 bfd_vma *offp;
12349 bfd_vma off;
12350 unsigned long indx = 0;
12351 struct got_entry *ent;
12352
12353 if (tls_type == (TLS_TLS | TLS_LD)
12354 && (h == NULL
12355 || !h->elf.def_dynamic))
12356 ent = ppc64_tlsld_got (input_bfd);
12357 else
12358 {
12359
12360 if (h != NULL)
12361 {
12362 bfd_boolean dyn = htab->elf.dynamic_sections_created;
12363 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared,
12364 &h->elf)
12365 || (info->shared
12366 && SYMBOL_REFERENCES_LOCAL (info, &h->elf)))
12367 /* This is actually a static link, or it is a
12368 -Bsymbolic link and the symbol is defined
12369 locally, or the symbol was forced to be local
12370 because of a version file. */
12371 ;
12372 else
12373 {
12374 indx = h->elf.dynindx;
12375 unresolved_reloc = FALSE;
12376 }
12377 ent = h->elf.got.glist;
12378 }
12379 else
12380 {
12381 if (local_got_ents == NULL)
12382 abort ();
12383 ent = local_got_ents[r_symndx];
12384 }
12385
12386 for (; ent != NULL; ent = ent->next)
12387 if (ent->addend == orig_addend
12388 && ent->owner == input_bfd
12389 && ent->tls_type == tls_type)
12390 break;
12391 }
12392
12393 if (ent == NULL)
12394 abort ();
12395 if (ent->is_indirect)
12396 ent = ent->got.ent;
12397 offp = &ent->got.offset;
12398 got = ppc64_elf_tdata (ent->owner)->got;
12399 if (got == NULL)
12400 abort ();
12401
12402 /* The offset must always be a multiple of 8. We use the
12403 least significant bit to record whether we have already
12404 processed this entry. */
12405 off = *offp;
12406 if ((off & 1) != 0)
12407 off &= ~1;
12408 else
12409 {
12410 /* Generate relocs for the dynamic linker, except in
12411 the case of TLSLD where we'll use one entry per
12412 module. */
12413 asection *relgot;
12414 bfd_boolean ifunc;
12415
12416 *offp = off | 1;
12417 relgot = NULL;
12418 ifunc = (h != NULL
12419 ? h->elf.type == STT_GNU_IFUNC
12420 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC);
12421 if ((info->shared || indx != 0)
12422 && (h == NULL
12423 || (tls_type == (TLS_TLS | TLS_LD)
12424 && !h->elf.def_dynamic)
12425 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
12426 || h->elf.root.type != bfd_link_hash_undefweak))
12427 relgot = ppc64_elf_tdata (ent->owner)->relgot;
12428 else if (ifunc)
12429 relgot = htab->reliplt;
12430 if (relgot != NULL)
12431 {
12432 outrel.r_offset = (got->output_section->vma
12433 + got->output_offset
12434 + off);
12435 outrel.r_addend = addend;
12436 if (tls_type & (TLS_LD | TLS_GD))
12437 {
12438 outrel.r_addend = 0;
12439 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
12440 if (tls_type == (TLS_TLS | TLS_GD))
12441 {
12442 loc = relgot->contents;
12443 loc += (relgot->reloc_count++
12444 * sizeof (Elf64_External_Rela));
12445 bfd_elf64_swap_reloca_out (output_bfd,
12446 &outrel, loc);
12447 outrel.r_offset += 8;
12448 outrel.r_addend = addend;
12449 outrel.r_info
12450 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
12451 }
12452 }
12453 else if (tls_type == (TLS_TLS | TLS_DTPREL))
12454 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
12455 else if (tls_type == (TLS_TLS | TLS_TPREL))
12456 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
12457 else if (indx != 0)
12458 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
12459 else
12460 {
12461 if (ifunc)
12462 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
12463 else
12464 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
12465
12466 /* Write the .got section contents for the sake
12467 of prelink. */
12468 loc = got->contents + off;
12469 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
12470 loc);
12471 }
12472
12473 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
12474 {
12475 outrel.r_addend += relocation;
12476 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
12477 outrel.r_addend -= htab->elf.tls_sec->vma;
12478 }
12479 loc = relgot->contents;
12480 loc += (relgot->reloc_count++
12481 * sizeof (Elf64_External_Rela));
12482 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
12483 }
12484
12485 /* Init the .got section contents here if we're not
12486 emitting a reloc. */
12487 else
12488 {
12489 relocation += addend;
12490 if (tls_type == (TLS_TLS | TLS_LD))
12491 relocation = 1;
12492 else if (tls_type != 0)
12493 {
12494 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
12495 if (tls_type == (TLS_TLS | TLS_TPREL))
12496 relocation += DTP_OFFSET - TP_OFFSET;
12497
12498 if (tls_type == (TLS_TLS | TLS_GD))
12499 {
12500 bfd_put_64 (output_bfd, relocation,
12501 got->contents + off + 8);
12502 relocation = 1;
12503 }
12504 }
12505
12506 bfd_put_64 (output_bfd, relocation,
12507 got->contents + off);
12508 }
12509 }
12510
12511 if (off >= (bfd_vma) -2)
12512 abort ();
12513
12514 relocation = got->output_section->vma + got->output_offset + off;
12515 addend = -(TOCstart + htab->stub_group[input_section->id].toc_off);
12516 }
12517 break;
12518
12519 case R_PPC64_PLT16_HA:
12520 case R_PPC64_PLT16_HI:
12521 case R_PPC64_PLT16_LO:
12522 case R_PPC64_PLT32:
12523 case R_PPC64_PLT64:
12524 /* Relocation is to the entry for this symbol in the
12525 procedure linkage table. */
12526
12527 /* Resolve a PLT reloc against a local symbol directly,
12528 without using the procedure linkage table. */
12529 if (h == NULL)
12530 break;
12531
12532 /* It's possible that we didn't make a PLT entry for this
12533 symbol. This happens when statically linking PIC code,
12534 or when using -Bsymbolic. Go find a match if there is a
12535 PLT entry. */
12536 if (htab->plt != NULL)
12537 {
12538 struct plt_entry *ent;
12539 for (ent = h->elf.plt.plist; ent != NULL; ent = ent->next)
12540 if (ent->addend == orig_addend
12541 && ent->plt.offset != (bfd_vma) -1)
12542 {
12543 relocation = (htab->plt->output_section->vma
12544 + htab->plt->output_offset
12545 + ent->plt.offset);
12546 unresolved_reloc = FALSE;
12547 }
12548 }
12549 break;
12550
12551 case R_PPC64_TOC:
12552 /* Relocation value is TOC base. */
12553 relocation = TOCstart;
12554 if (r_symndx == 0)
12555 relocation += htab->stub_group[input_section->id].toc_off;
12556 else if (unresolved_reloc)
12557 ;
12558 else if (sec != NULL && sec->id <= htab->top_id)
12559 relocation += htab->stub_group[sec->id].toc_off;
12560 else
12561 unresolved_reloc = TRUE;
12562 goto dodyn;
12563
12564 /* TOC16 relocs. We want the offset relative to the TOC base,
12565 which is the address of the start of the TOC plus 0x8000.
12566 The TOC consists of sections .got, .toc, .tocbss, and .plt,
12567 in this order. */
12568 case R_PPC64_TOC16:
12569 case R_PPC64_TOC16_LO:
12570 case R_PPC64_TOC16_HI:
12571 case R_PPC64_TOC16_DS:
12572 case R_PPC64_TOC16_LO_DS:
12573 case R_PPC64_TOC16_HA:
12574 addend -= TOCstart + htab->stub_group[input_section->id].toc_off;
12575 break;
12576
12577 /* Relocate against the beginning of the section. */
12578 case R_PPC64_SECTOFF:
12579 case R_PPC64_SECTOFF_LO:
12580 case R_PPC64_SECTOFF_HI:
12581 case R_PPC64_SECTOFF_DS:
12582 case R_PPC64_SECTOFF_LO_DS:
12583 case R_PPC64_SECTOFF_HA:
12584 if (sec != NULL)
12585 addend -= sec->output_section->vma;
12586 break;
12587
12588 case R_PPC64_REL16:
12589 case R_PPC64_REL16_LO:
12590 case R_PPC64_REL16_HI:
12591 case R_PPC64_REL16_HA:
12592 break;
12593
12594 case R_PPC64_REL14:
12595 case R_PPC64_REL14_BRNTAKEN:
12596 case R_PPC64_REL14_BRTAKEN:
12597 case R_PPC64_REL24:
12598 break;
12599
12600 case R_PPC64_TPREL16:
12601 case R_PPC64_TPREL16_LO:
12602 case R_PPC64_TPREL16_HI:
12603 case R_PPC64_TPREL16_HA:
12604 case R_PPC64_TPREL16_DS:
12605 case R_PPC64_TPREL16_LO_DS:
12606 case R_PPC64_TPREL16_HIGHER:
12607 case R_PPC64_TPREL16_HIGHERA:
12608 case R_PPC64_TPREL16_HIGHEST:
12609 case R_PPC64_TPREL16_HIGHESTA:
12610 if (h != NULL
12611 && h->elf.root.type == bfd_link_hash_undefweak
12612 && h->elf.dynindx == -1)
12613 {
12614 /* Make this relocation against an undefined weak symbol
12615 resolve to zero. This is really just a tweak, since
12616 code using weak externs ought to check that they are
12617 defined before using them. */
12618 bfd_byte *p = contents + rel->r_offset - d_offset;
12619
12620 insn = bfd_get_32 (output_bfd, p);
12621 insn = _bfd_elf_ppc_at_tprel_transform (insn, 13);
12622 if (insn != 0)
12623 bfd_put_32 (output_bfd, insn, p);
12624 break;
12625 }
12626 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
12627 if (info->shared)
12628 /* The TPREL16 relocs shouldn't really be used in shared
12629 libs as they will result in DT_TEXTREL being set, but
12630 support them anyway. */
12631 goto dodyn;
12632 break;
12633
12634 case R_PPC64_DTPREL16:
12635 case R_PPC64_DTPREL16_LO:
12636 case R_PPC64_DTPREL16_HI:
12637 case R_PPC64_DTPREL16_HA:
12638 case R_PPC64_DTPREL16_DS:
12639 case R_PPC64_DTPREL16_LO_DS:
12640 case R_PPC64_DTPREL16_HIGHER:
12641 case R_PPC64_DTPREL16_HIGHERA:
12642 case R_PPC64_DTPREL16_HIGHEST:
12643 case R_PPC64_DTPREL16_HIGHESTA:
12644 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
12645 break;
12646
12647 case R_PPC64_DTPMOD64:
12648 relocation = 1;
12649 addend = 0;
12650 goto dodyn;
12651
12652 case R_PPC64_TPREL64:
12653 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
12654 goto dodyn;
12655
12656 case R_PPC64_DTPREL64:
12657 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
12658 /* Fall thru */
12659
12660 /* Relocations that may need to be propagated if this is a
12661 dynamic object. */
12662 case R_PPC64_REL30:
12663 case R_PPC64_REL32:
12664 case R_PPC64_REL64:
12665 case R_PPC64_ADDR14:
12666 case R_PPC64_ADDR14_BRNTAKEN:
12667 case R_PPC64_ADDR14_BRTAKEN:
12668 case R_PPC64_ADDR16:
12669 case R_PPC64_ADDR16_DS:
12670 case R_PPC64_ADDR16_HA:
12671 case R_PPC64_ADDR16_HI:
12672 case R_PPC64_ADDR16_HIGHER:
12673 case R_PPC64_ADDR16_HIGHERA:
12674 case R_PPC64_ADDR16_HIGHEST:
12675 case R_PPC64_ADDR16_HIGHESTA:
12676 case R_PPC64_ADDR16_LO:
12677 case R_PPC64_ADDR16_LO_DS:
12678 case R_PPC64_ADDR24:
12679 case R_PPC64_ADDR32:
12680 case R_PPC64_ADDR64:
12681 case R_PPC64_UADDR16:
12682 case R_PPC64_UADDR32:
12683 case R_PPC64_UADDR64:
12684 dodyn:
12685 if ((input_section->flags & SEC_ALLOC) == 0)
12686 break;
12687
12688 if (NO_OPD_RELOCS && is_opd)
12689 break;
12690
12691 if ((info->shared
12692 && (h == NULL
12693 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
12694 || h->elf.root.type != bfd_link_hash_undefweak)
12695 && (must_be_dyn_reloc (info, r_type)
12696 || !SYMBOL_CALLS_LOCAL (info, &h->elf)))
12697 || (ELIMINATE_COPY_RELOCS
12698 && !info->shared
12699 && h != NULL
12700 && h->elf.dynindx != -1
12701 && !h->elf.non_got_ref
12702 && !h->elf.def_regular)
12703 || (!info->shared
12704 && (h != NULL
12705 ? h->elf.type == STT_GNU_IFUNC
12706 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)))
12707 {
12708 bfd_boolean skip, relocate;
12709 asection *sreloc;
12710 bfd_vma out_off;
12711
12712 /* When generating a dynamic object, these relocations
12713 are copied into the output file to be resolved at run
12714 time. */
12715
12716 skip = FALSE;
12717 relocate = FALSE;
12718
12719 out_off = _bfd_elf_section_offset (output_bfd, info,
12720 input_section, rel->r_offset);
12721 if (out_off == (bfd_vma) -1)
12722 skip = TRUE;
12723 else if (out_off == (bfd_vma) -2)
12724 skip = TRUE, relocate = TRUE;
12725 out_off += (input_section->output_section->vma
12726 + input_section->output_offset);
12727 outrel.r_offset = out_off;
12728 outrel.r_addend = rel->r_addend;
12729
12730 /* Optimize unaligned reloc use. */
12731 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
12732 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
12733 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
12734 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
12735 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
12736 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
12737 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
12738 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
12739 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
12740
12741 if (skip)
12742 memset (&outrel, 0, sizeof outrel);
12743 else if (!SYMBOL_REFERENCES_LOCAL (info, &h->elf)
12744 && !is_opd
12745 && r_type != R_PPC64_TOC)
12746 outrel.r_info = ELF64_R_INFO (h->elf.dynindx, r_type);
12747 else
12748 {
12749 /* This symbol is local, or marked to become local,
12750 or this is an opd section reloc which must point
12751 at a local function. */
12752 outrel.r_addend += relocation;
12753 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
12754 {
12755 if (is_opd && h != NULL)
12756 {
12757 /* Lie about opd entries. This case occurs
12758 when building shared libraries and we
12759 reference a function in another shared
12760 lib. The same thing happens for a weak
12761 definition in an application that's
12762 overridden by a strong definition in a
12763 shared lib. (I believe this is a generic
12764 bug in binutils handling of weak syms.)
12765 In these cases we won't use the opd
12766 entry in this lib. */
12767 unresolved_reloc = FALSE;
12768 }
12769 if (!is_opd
12770 && r_type == R_PPC64_ADDR64
12771 && (h != NULL
12772 ? h->elf.type == STT_GNU_IFUNC
12773 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
12774 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
12775 else
12776 {
12777 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
12778
12779 /* We need to relocate .opd contents for ld.so.
12780 Prelink also wants simple and consistent rules
12781 for relocs. This make all RELATIVE relocs have
12782 *r_offset equal to r_addend. */
12783 relocate = TRUE;
12784 }
12785 }
12786 else
12787 {
12788 long indx = 0;
12789
12790 if (h != NULL
12791 ? h->elf.type == STT_GNU_IFUNC
12792 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
12793 {
12794 (*_bfd_error_handler)
12795 (_("%B(%A+0x%lx): relocation %s for indirect "
12796 "function %s unsupported"),
12797 input_bfd,
12798 input_section,
12799 (long) rel->r_offset,
12800 ppc64_elf_howto_table[r_type]->name,
12801 sym_name);
12802 ret = FALSE;
12803 }
12804 else if (r_symndx == 0 || bfd_is_abs_section (sec))
12805 ;
12806 else if (sec == NULL || sec->owner == NULL)
12807 {
12808 bfd_set_error (bfd_error_bad_value);
12809 return FALSE;
12810 }
12811 else
12812 {
12813 asection *osec;
12814
12815 osec = sec->output_section;
12816 indx = elf_section_data (osec)->dynindx;
12817
12818 if (indx == 0)
12819 {
12820 if ((osec->flags & SEC_READONLY) == 0
12821 && htab->elf.data_index_section != NULL)
12822 osec = htab->elf.data_index_section;
12823 else
12824 osec = htab->elf.text_index_section;
12825 indx = elf_section_data (osec)->dynindx;
12826 }
12827 BFD_ASSERT (indx != 0);
12828
12829 /* We are turning this relocation into one
12830 against a section symbol, so subtract out
12831 the output section's address but not the
12832 offset of the input section in the output
12833 section. */
12834 outrel.r_addend -= osec->vma;
12835 }
12836
12837 outrel.r_info = ELF64_R_INFO (indx, r_type);
12838 }
12839 }
12840
12841 sreloc = elf_section_data (input_section)->sreloc;
12842 if (!htab->elf.dynamic_sections_created)
12843 sreloc = htab->reliplt;
12844 if (sreloc == NULL)
12845 abort ();
12846
12847 if (sreloc->reloc_count * sizeof (Elf64_External_Rela)
12848 >= sreloc->size)
12849 abort ();
12850 loc = sreloc->contents;
12851 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
12852 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
12853
12854 /* If this reloc is against an external symbol, it will
12855 be computed at runtime, so there's no need to do
12856 anything now. However, for the sake of prelink ensure
12857 that the section contents are a known value. */
12858 if (! relocate)
12859 {
12860 unresolved_reloc = FALSE;
12861 /* The value chosen here is quite arbitrary as ld.so
12862 ignores section contents except for the special
12863 case of .opd where the contents might be accessed
12864 before relocation. Choose zero, as that won't
12865 cause reloc overflow. */
12866 relocation = 0;
12867 addend = 0;
12868 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
12869 to improve backward compatibility with older
12870 versions of ld. */
12871 if (r_type == R_PPC64_ADDR64)
12872 addend = outrel.r_addend;
12873 /* Adjust pc_relative relocs to have zero in *r_offset. */
12874 else if (ppc64_elf_howto_table[r_type]->pc_relative)
12875 addend = (input_section->output_section->vma
12876 + input_section->output_offset
12877 + rel->r_offset);
12878 }
12879 }
12880 break;
12881
12882 case R_PPC64_COPY:
12883 case R_PPC64_GLOB_DAT:
12884 case R_PPC64_JMP_SLOT:
12885 case R_PPC64_JMP_IREL:
12886 case R_PPC64_RELATIVE:
12887 /* We shouldn't ever see these dynamic relocs in relocatable
12888 files. */
12889 /* Fall through. */
12890
12891 case R_PPC64_PLTGOT16:
12892 case R_PPC64_PLTGOT16_DS:
12893 case R_PPC64_PLTGOT16_HA:
12894 case R_PPC64_PLTGOT16_HI:
12895 case R_PPC64_PLTGOT16_LO:
12896 case R_PPC64_PLTGOT16_LO_DS:
12897 case R_PPC64_PLTREL32:
12898 case R_PPC64_PLTREL64:
12899 /* These ones haven't been implemented yet. */
12900
12901 (*_bfd_error_handler)
12902 (_("%B: relocation %s is not supported for symbol %s."),
12903 input_bfd,
12904 ppc64_elf_howto_table[r_type]->name, sym_name);
12905
12906 bfd_set_error (bfd_error_invalid_operation);
12907 ret = FALSE;
12908 continue;
12909 }
12910
12911 /* Multi-instruction sequences that access the TOC can be
12912 optimized, eg. addis ra,r2,0; addi rb,ra,x;
12913 to nop; addi rb,r2,x; */
12914 switch (r_type)
12915 {
12916 default:
12917 break;
12918
12919 case R_PPC64_GOT_TLSLD16_HI:
12920 case R_PPC64_GOT_TLSGD16_HI:
12921 case R_PPC64_GOT_TPREL16_HI:
12922 case R_PPC64_GOT_DTPREL16_HI:
12923 case R_PPC64_GOT16_HI:
12924 case R_PPC64_TOC16_HI:
12925 /* These relocs would only be useful if building up an
12926 offset to later add to r2, perhaps in an indexed
12927 addressing mode instruction. Don't try to optimize.
12928 Unfortunately, the possibility of someone building up an
12929 offset like this or even with the HA relocs, means that
12930 we need to check the high insn when optimizing the low
12931 insn. */
12932 break;
12933
12934 case R_PPC64_GOT_TLSLD16_HA:
12935 case R_PPC64_GOT_TLSGD16_HA:
12936 case R_PPC64_GOT_TPREL16_HA:
12937 case R_PPC64_GOT_DTPREL16_HA:
12938 case R_PPC64_GOT16_HA:
12939 case R_PPC64_TOC16_HA:
12940 /* For now we don't nop out the first instruction. */
12941 break;
12942
12943 case R_PPC64_GOT_TLSLD16_LO:
12944 case R_PPC64_GOT_TLSGD16_LO:
12945 case R_PPC64_GOT_TPREL16_LO_DS:
12946 case R_PPC64_GOT_DTPREL16_LO_DS:
12947 case R_PPC64_GOT16_LO:
12948 case R_PPC64_GOT16_LO_DS:
12949 case R_PPC64_TOC16_LO:
12950 case R_PPC64_TOC16_LO_DS:
12951 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000)
12952 {
12953 bfd_byte *p = contents + (rel->r_offset & ~3);
12954 insn = bfd_get_32 (input_bfd, p);
12955 if ((insn & (0x3f << 26)) == 14u << 26 /* addi */
12956 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
12957 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
12958 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
12959 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
12960 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
12961 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
12962 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
12963 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
12964 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
12965 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
12966 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
12967 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
12968 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
12969 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
12970 && (insn & 3) != 1)
12971 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
12972 && ((insn & 3) == 0 || (insn & 3) == 3)))
12973 {
12974 unsigned int reg = (insn >> 16) & 0x1f;
12975 if (ha_reloc_match (relocs, rel, reg, input_bfd, contents))
12976 {
12977 insn &= ~(0x1f << 16);
12978 insn |= 2 << 16;
12979 bfd_put_32 (input_bfd, insn, p);
12980 }
12981 }
12982 }
12983 break;
12984 }
12985
12986 /* Do any further special processing. */
12987 switch (r_type)
12988 {
12989 default:
12990 break;
12991
12992 case R_PPC64_ADDR16_HA:
12993 case R_PPC64_REL16_HA:
12994 case R_PPC64_ADDR16_HIGHERA:
12995 case R_PPC64_ADDR16_HIGHESTA:
12996 case R_PPC64_TOC16_HA:
12997 case R_PPC64_SECTOFF_HA:
12998 case R_PPC64_TPREL16_HA:
12999 case R_PPC64_DTPREL16_HA:
13000 case R_PPC64_TPREL16_HIGHER:
13001 case R_PPC64_TPREL16_HIGHERA:
13002 case R_PPC64_TPREL16_HIGHEST:
13003 case R_PPC64_TPREL16_HIGHESTA:
13004 case R_PPC64_DTPREL16_HIGHER:
13005 case R_PPC64_DTPREL16_HIGHERA:
13006 case R_PPC64_DTPREL16_HIGHEST:
13007 case R_PPC64_DTPREL16_HIGHESTA:
13008 /* It's just possible that this symbol is a weak symbol
13009 that's not actually defined anywhere. In that case,
13010 'sec' would be NULL, and we should leave the symbol
13011 alone (it will be set to zero elsewhere in the link). */
13012 if (sec == NULL)
13013 break;
13014 /* Fall thru */
13015
13016 case R_PPC64_GOT16_HA:
13017 case R_PPC64_PLTGOT16_HA:
13018 case R_PPC64_PLT16_HA:
13019 case R_PPC64_GOT_TLSGD16_HA:
13020 case R_PPC64_GOT_TLSLD16_HA:
13021 case R_PPC64_GOT_TPREL16_HA:
13022 case R_PPC64_GOT_DTPREL16_HA:
13023 /* Add 0x10000 if sign bit in 0:15 is set.
13024 Bits 0:15 are not used. */
13025 addend += 0x8000;
13026 break;
13027
13028 case R_PPC64_ADDR16_DS:
13029 case R_PPC64_ADDR16_LO_DS:
13030 case R_PPC64_GOT16_DS:
13031 case R_PPC64_GOT16_LO_DS:
13032 case R_PPC64_PLT16_LO_DS:
13033 case R_PPC64_SECTOFF_DS:
13034 case R_PPC64_SECTOFF_LO_DS:
13035 case R_PPC64_TOC16_DS:
13036 case R_PPC64_TOC16_LO_DS:
13037 case R_PPC64_PLTGOT16_DS:
13038 case R_PPC64_PLTGOT16_LO_DS:
13039 case R_PPC64_GOT_TPREL16_DS:
13040 case R_PPC64_GOT_TPREL16_LO_DS:
13041 case R_PPC64_GOT_DTPREL16_DS:
13042 case R_PPC64_GOT_DTPREL16_LO_DS:
13043 case R_PPC64_TPREL16_DS:
13044 case R_PPC64_TPREL16_LO_DS:
13045 case R_PPC64_DTPREL16_DS:
13046 case R_PPC64_DTPREL16_LO_DS:
13047 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
13048 mask = 3;
13049 /* If this reloc is against an lq insn, then the value must be
13050 a multiple of 16. This is somewhat of a hack, but the
13051 "correct" way to do this by defining _DQ forms of all the
13052 _DS relocs bloats all reloc switches in this file. It
13053 doesn't seem to make much sense to use any of these relocs
13054 in data, so testing the insn should be safe. */
13055 if ((insn & (0x3f << 26)) == (56u << 26))
13056 mask = 15;
13057 if (((relocation + addend) & mask) != 0)
13058 {
13059 (*_bfd_error_handler)
13060 (_("%B: error: relocation %s not a multiple of %d"),
13061 input_bfd,
13062 ppc64_elf_howto_table[r_type]->name,
13063 mask + 1);
13064 bfd_set_error (bfd_error_bad_value);
13065 ret = FALSE;
13066 continue;
13067 }
13068 break;
13069 }
13070
13071 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
13072 because such sections are not SEC_ALLOC and thus ld.so will
13073 not process them. */
13074 if (unresolved_reloc
13075 && !((input_section->flags & SEC_DEBUGGING) != 0
13076 && h->elf.def_dynamic))
13077 {
13078 (*_bfd_error_handler)
13079 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
13080 input_bfd,
13081 input_section,
13082 (long) rel->r_offset,
13083 ppc64_elf_howto_table[(int) r_type]->name,
13084 h->elf.root.root.string);
13085 ret = FALSE;
13086 }
13087
13088 r = _bfd_final_link_relocate (ppc64_elf_howto_table[(int) r_type],
13089 input_bfd,
13090 input_section,
13091 contents,
13092 rel->r_offset,
13093 relocation,
13094 addend);
13095
13096 if (r != bfd_reloc_ok)
13097 {
13098 if (sym_name == NULL)
13099 sym_name = "(null)";
13100 if (r == bfd_reloc_overflow)
13101 {
13102 if (warned)
13103 continue;
13104 if (h != NULL
13105 && h->elf.root.type == bfd_link_hash_undefweak
13106 && ppc64_elf_howto_table[r_type]->pc_relative)
13107 {
13108 /* Assume this is a call protected by other code that
13109 detects the symbol is undefined. If this is the case,
13110 we can safely ignore the overflow. If not, the
13111 program is hosed anyway, and a little warning isn't
13112 going to help. */
13113
13114 continue;
13115 }
13116
13117 if (!((*info->callbacks->reloc_overflow)
13118 (info, (h ? &h->elf.root : NULL), sym_name,
13119 ppc64_elf_howto_table[r_type]->name,
13120 orig_addend, input_bfd, input_section, rel->r_offset)))
13121 return FALSE;
13122 }
13123 else
13124 {
13125 (*_bfd_error_handler)
13126 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
13127 input_bfd,
13128 input_section,
13129 (long) rel->r_offset,
13130 ppc64_elf_howto_table[r_type]->name,
13131 sym_name,
13132 (int) r);
13133 ret = FALSE;
13134 }
13135 }
13136 }
13137
13138 /* If we're emitting relocations, then shortly after this function
13139 returns, reloc offsets and addends for this section will be
13140 adjusted. Worse, reloc symbol indices will be for the output
13141 file rather than the input. Save a copy of the relocs for
13142 opd_entry_value. */
13143 if (is_opd && (info->emitrelocations || info->relocatable))
13144 {
13145 bfd_size_type amt;
13146 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
13147 rel = bfd_alloc (input_bfd, amt);
13148 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd_relocs == NULL);
13149 ppc64_elf_tdata (input_bfd)->opd_relocs = rel;
13150 if (rel == NULL)
13151 return FALSE;
13152 memcpy (rel, relocs, amt);
13153 }
13154 return ret;
13155 }
13156
13157 /* Adjust the value of any local symbols in opd sections. */
13158
13159 static int
13160 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
13161 const char *name ATTRIBUTE_UNUSED,
13162 Elf_Internal_Sym *elfsym,
13163 asection *input_sec,
13164 struct elf_link_hash_entry *h)
13165 {
13166 struct _opd_sec_data *opd;
13167 long adjust;
13168 bfd_vma value;
13169
13170 if (h != NULL)
13171 return 1;
13172
13173 opd = get_opd_info (input_sec);
13174 if (opd == NULL || opd->adjust == NULL)
13175 return 1;
13176
13177 value = elfsym->st_value - input_sec->output_offset;
13178 if (!info->relocatable)
13179 value -= input_sec->output_section->vma;
13180
13181 adjust = opd->adjust[value / 8];
13182 if (adjust == -1)
13183 return 2;
13184
13185 elfsym->st_value += adjust;
13186 return 1;
13187 }
13188
13189 /* Finish up dynamic symbol handling. We set the contents of various
13190 dynamic sections here. */
13191
13192 static bfd_boolean
13193 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
13194 struct bfd_link_info *info,
13195 struct elf_link_hash_entry *h,
13196 Elf_Internal_Sym *sym)
13197 {
13198 struct ppc_link_hash_table *htab;
13199 struct plt_entry *ent;
13200 Elf_Internal_Rela rela;
13201 bfd_byte *loc;
13202
13203 htab = ppc_hash_table (info);
13204 if (htab == NULL)
13205 return FALSE;
13206
13207 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
13208 if (ent->plt.offset != (bfd_vma) -1)
13209 {
13210 /* This symbol has an entry in the procedure linkage
13211 table. Set it up. */
13212 if (!htab->elf.dynamic_sections_created
13213 || h->dynindx == -1)
13214 {
13215 BFD_ASSERT (h->type == STT_GNU_IFUNC
13216 && h->def_regular
13217 && (h->root.type == bfd_link_hash_defined
13218 || h->root.type == bfd_link_hash_defweak));
13219 rela.r_offset = (htab->iplt->output_section->vma
13220 + htab->iplt->output_offset
13221 + ent->plt.offset);
13222 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
13223 rela.r_addend = (h->root.u.def.value
13224 + h->root.u.def.section->output_offset
13225 + h->root.u.def.section->output_section->vma
13226 + ent->addend);
13227 loc = (htab->reliplt->contents
13228 + (htab->reliplt->reloc_count++
13229 * sizeof (Elf64_External_Rela)));
13230 }
13231 else
13232 {
13233 rela.r_offset = (htab->plt->output_section->vma
13234 + htab->plt->output_offset
13235 + ent->plt.offset);
13236 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
13237 rela.r_addend = ent->addend;
13238 loc = (htab->relplt->contents
13239 + ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE)
13240 / (PLT_ENTRY_SIZE / sizeof (Elf64_External_Rela))));
13241 }
13242 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
13243 }
13244
13245 if (h->needs_copy)
13246 {
13247 /* This symbol needs a copy reloc. Set it up. */
13248
13249 if (h->dynindx == -1
13250 || (h->root.type != bfd_link_hash_defined
13251 && h->root.type != bfd_link_hash_defweak)
13252 || htab->relbss == NULL)
13253 abort ();
13254
13255 rela.r_offset = (h->root.u.def.value
13256 + h->root.u.def.section->output_section->vma
13257 + h->root.u.def.section->output_offset);
13258 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
13259 rela.r_addend = 0;
13260 loc = htab->relbss->contents;
13261 loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela);
13262 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
13263 }
13264
13265 /* Mark some specially defined symbols as absolute. */
13266 if (strcmp (h->root.root.string, "_DYNAMIC") == 0)
13267 sym->st_shndx = SHN_ABS;
13268
13269 return TRUE;
13270 }
13271
13272 /* Used to decide how to sort relocs in an optimal manner for the
13273 dynamic linker, before writing them out. */
13274
13275 static enum elf_reloc_type_class
13276 ppc64_elf_reloc_type_class (const Elf_Internal_Rela *rela)
13277 {
13278 enum elf_ppc64_reloc_type r_type;
13279
13280 r_type = ELF64_R_TYPE (rela->r_info);
13281 switch (r_type)
13282 {
13283 case R_PPC64_RELATIVE:
13284 return reloc_class_relative;
13285 case R_PPC64_JMP_SLOT:
13286 return reloc_class_plt;
13287 case R_PPC64_COPY:
13288 return reloc_class_copy;
13289 default:
13290 return reloc_class_normal;
13291 }
13292 }
13293
13294 /* Finish up the dynamic sections. */
13295
13296 static bfd_boolean
13297 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
13298 struct bfd_link_info *info)
13299 {
13300 struct ppc_link_hash_table *htab;
13301 bfd *dynobj;
13302 asection *sdyn;
13303
13304 htab = ppc_hash_table (info);
13305 if (htab == NULL)
13306 return FALSE;
13307
13308 dynobj = htab->elf.dynobj;
13309 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
13310
13311 if (htab->elf.dynamic_sections_created)
13312 {
13313 Elf64_External_Dyn *dyncon, *dynconend;
13314
13315 if (sdyn == NULL || htab->got == NULL)
13316 abort ();
13317
13318 dyncon = (Elf64_External_Dyn *) sdyn->contents;
13319 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
13320 for (; dyncon < dynconend; dyncon++)
13321 {
13322 Elf_Internal_Dyn dyn;
13323 asection *s;
13324
13325 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
13326
13327 switch (dyn.d_tag)
13328 {
13329 default:
13330 continue;
13331
13332 case DT_PPC64_GLINK:
13333 s = htab->glink;
13334 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
13335 /* We stupidly defined DT_PPC64_GLINK to be the start
13336 of glink rather than the first entry point, which is
13337 what ld.so needs, and now have a bigger stub to
13338 support automatic multiple TOCs. */
13339 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 32;
13340 break;
13341
13342 case DT_PPC64_OPD:
13343 s = bfd_get_section_by_name (output_bfd, ".opd");
13344 if (s == NULL)
13345 continue;
13346 dyn.d_un.d_ptr = s->vma;
13347 break;
13348
13349 case DT_PPC64_OPDSZ:
13350 s = bfd_get_section_by_name (output_bfd, ".opd");
13351 if (s == NULL)
13352 continue;
13353 dyn.d_un.d_val = s->size;
13354 break;
13355
13356 case DT_PLTGOT:
13357 s = htab->plt;
13358 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
13359 break;
13360
13361 case DT_JMPREL:
13362 s = htab->relplt;
13363 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
13364 break;
13365
13366 case DT_PLTRELSZ:
13367 dyn.d_un.d_val = htab->relplt->size;
13368 break;
13369
13370 case DT_RELASZ:
13371 /* Don't count procedure linkage table relocs in the
13372 overall reloc count. */
13373 s = htab->relplt;
13374 if (s == NULL)
13375 continue;
13376 dyn.d_un.d_val -= s->size;
13377 break;
13378
13379 case DT_RELA:
13380 /* We may not be using the standard ELF linker script.
13381 If .rela.plt is the first .rela section, we adjust
13382 DT_RELA to not include it. */
13383 s = htab->relplt;
13384 if (s == NULL)
13385 continue;
13386 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
13387 continue;
13388 dyn.d_un.d_ptr += s->size;
13389 break;
13390 }
13391
13392 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
13393 }
13394 }
13395
13396 if (htab->got != NULL && htab->got->size != 0)
13397 {
13398 /* Fill in the first entry in the global offset table.
13399 We use it to hold the link-time TOCbase. */
13400 bfd_put_64 (output_bfd,
13401 elf_gp (output_bfd) + TOC_BASE_OFF,
13402 htab->got->contents);
13403
13404 /* Set .got entry size. */
13405 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 8;
13406 }
13407
13408 if (htab->plt != NULL && htab->plt->size != 0)
13409 {
13410 /* Set .plt entry size. */
13411 elf_section_data (htab->plt->output_section)->this_hdr.sh_entsize
13412 = PLT_ENTRY_SIZE;
13413 }
13414
13415 /* brlt is SEC_LINKER_CREATED, so we need to write out relocs for
13416 brlt ourselves if emitrelocations. */
13417 if (htab->brlt != NULL
13418 && htab->brlt->reloc_count != 0
13419 && !_bfd_elf_link_output_relocs (output_bfd,
13420 htab->brlt,
13421 &elf_section_data (htab->brlt)->rel_hdr,
13422 elf_section_data (htab->brlt)->relocs,
13423 NULL))
13424 return FALSE;
13425
13426 if (htab->glink != NULL
13427 && htab->glink->reloc_count != 0
13428 && !_bfd_elf_link_output_relocs (output_bfd,
13429 htab->glink,
13430 &elf_section_data (htab->glink)->rel_hdr,
13431 elf_section_data (htab->glink)->relocs,
13432 NULL))
13433 return FALSE;
13434
13435 /* We need to handle writing out multiple GOT sections ourselves,
13436 since we didn't add them to DYNOBJ. We know dynobj is the first
13437 bfd. */
13438 while ((dynobj = dynobj->link_next) != NULL)
13439 {
13440 asection *s;
13441
13442 if (!is_ppc64_elf (dynobj))
13443 continue;
13444
13445 s = ppc64_elf_tdata (dynobj)->got;
13446 if (s != NULL
13447 && s->size != 0
13448 && s->output_section != bfd_abs_section_ptr
13449 && !bfd_set_section_contents (output_bfd, s->output_section,
13450 s->contents, s->output_offset,
13451 s->size))
13452 return FALSE;
13453 s = ppc64_elf_tdata (dynobj)->relgot;
13454 if (s != NULL
13455 && s->size != 0
13456 && s->output_section != bfd_abs_section_ptr
13457 && !bfd_set_section_contents (output_bfd, s->output_section,
13458 s->contents, s->output_offset,
13459 s->size))
13460 return FALSE;
13461 }
13462
13463 return TRUE;
13464 }
13465
13466 #include "elf64-target.h"