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[deliverable/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
3792 /* Set on error. */
3793 unsigned int stub_error:1;
3794
3795 /* Temp used by ppc64_elf_process_dot_syms. */
3796 unsigned int twiddled_syms:1;
3797
3798 /* Incremented every time we size stubs. */
3799 unsigned int stub_iteration;
3800
3801 /* Small local sym cache. */
3802 struct sym_cache sym_cache;
3803 };
3804
3805 /* Rename some of the generic section flags to better document how they
3806 are used here. */
3807
3808 /* Nonzero if this section has TLS related relocations. */
3809 #define has_tls_reloc sec_flg0
3810
3811 /* Nonzero if this section has a call to __tls_get_addr. */
3812 #define has_tls_get_addr_call sec_flg1
3813
3814 /* Nonzero if this section has any toc or got relocs. */
3815 #define has_toc_reloc sec_flg2
3816
3817 /* Nonzero if this section has a call to another section that uses
3818 the toc or got. */
3819 #define makes_toc_func_call sec_flg3
3820
3821 /* Recursion protection when determining above flag. */
3822 #define call_check_in_progress sec_flg4
3823 #define call_check_done sec_flg5
3824
3825 /* Get the ppc64 ELF linker hash table from a link_info structure. */
3826
3827 #define ppc_hash_table(p) \
3828 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
3829 == PPC64_ELF_DATA ? ((struct ppc_link_hash_table *) ((p)->hash)) : NULL)
3830
3831 #define ppc_stub_hash_lookup(table, string, create, copy) \
3832 ((struct ppc_stub_hash_entry *) \
3833 bfd_hash_lookup ((table), (string), (create), (copy)))
3834
3835 #define ppc_branch_hash_lookup(table, string, create, copy) \
3836 ((struct ppc_branch_hash_entry *) \
3837 bfd_hash_lookup ((table), (string), (create), (copy)))
3838
3839 /* Create an entry in the stub hash table. */
3840
3841 static struct bfd_hash_entry *
3842 stub_hash_newfunc (struct bfd_hash_entry *entry,
3843 struct bfd_hash_table *table,
3844 const char *string)
3845 {
3846 /* Allocate the structure if it has not already been allocated by a
3847 subclass. */
3848 if (entry == NULL)
3849 {
3850 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
3851 if (entry == NULL)
3852 return entry;
3853 }
3854
3855 /* Call the allocation method of the superclass. */
3856 entry = bfd_hash_newfunc (entry, table, string);
3857 if (entry != NULL)
3858 {
3859 struct ppc_stub_hash_entry *eh;
3860
3861 /* Initialize the local fields. */
3862 eh = (struct ppc_stub_hash_entry *) entry;
3863 eh->stub_type = ppc_stub_none;
3864 eh->stub_sec = NULL;
3865 eh->stub_offset = 0;
3866 eh->target_value = 0;
3867 eh->target_section = NULL;
3868 eh->h = NULL;
3869 eh->id_sec = NULL;
3870 }
3871
3872 return entry;
3873 }
3874
3875 /* Create an entry in the branch hash table. */
3876
3877 static struct bfd_hash_entry *
3878 branch_hash_newfunc (struct bfd_hash_entry *entry,
3879 struct bfd_hash_table *table,
3880 const char *string)
3881 {
3882 /* Allocate the structure if it has not already been allocated by a
3883 subclass. */
3884 if (entry == NULL)
3885 {
3886 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
3887 if (entry == NULL)
3888 return entry;
3889 }
3890
3891 /* Call the allocation method of the superclass. */
3892 entry = bfd_hash_newfunc (entry, table, string);
3893 if (entry != NULL)
3894 {
3895 struct ppc_branch_hash_entry *eh;
3896
3897 /* Initialize the local fields. */
3898 eh = (struct ppc_branch_hash_entry *) entry;
3899 eh->offset = 0;
3900 eh->iter = 0;
3901 }
3902
3903 return entry;
3904 }
3905
3906 /* Create an entry in a ppc64 ELF linker hash table. */
3907
3908 static struct bfd_hash_entry *
3909 link_hash_newfunc (struct bfd_hash_entry *entry,
3910 struct bfd_hash_table *table,
3911 const char *string)
3912 {
3913 /* Allocate the structure if it has not already been allocated by a
3914 subclass. */
3915 if (entry == NULL)
3916 {
3917 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
3918 if (entry == NULL)
3919 return entry;
3920 }
3921
3922 /* Call the allocation method of the superclass. */
3923 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
3924 if (entry != NULL)
3925 {
3926 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
3927
3928 memset (&eh->u.stub_cache, 0,
3929 (sizeof (struct ppc_link_hash_entry)
3930 - offsetof (struct ppc_link_hash_entry, u.stub_cache)));
3931
3932 /* When making function calls, old ABI code references function entry
3933 points (dot symbols), while new ABI code references the function
3934 descriptor symbol. We need to make any combination of reference and
3935 definition work together, without breaking archive linking.
3936
3937 For a defined function "foo" and an undefined call to "bar":
3938 An old object defines "foo" and ".foo", references ".bar" (possibly
3939 "bar" too).
3940 A new object defines "foo" and references "bar".
3941
3942 A new object thus has no problem with its undefined symbols being
3943 satisfied by definitions in an old object. On the other hand, the
3944 old object won't have ".bar" satisfied by a new object.
3945
3946 Keep a list of newly added dot-symbols. */
3947
3948 if (string[0] == '.')
3949 {
3950 struct ppc_link_hash_table *htab;
3951
3952 htab = (struct ppc_link_hash_table *) table;
3953 eh->u.next_dot_sym = htab->dot_syms;
3954 htab->dot_syms = eh;
3955 }
3956 }
3957
3958 return entry;
3959 }
3960
3961 /* Create a ppc64 ELF linker hash table. */
3962
3963 static struct bfd_link_hash_table *
3964 ppc64_elf_link_hash_table_create (bfd *abfd)
3965 {
3966 struct ppc_link_hash_table *htab;
3967 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
3968
3969 htab = bfd_zmalloc (amt);
3970 if (htab == NULL)
3971 return NULL;
3972
3973 if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc,
3974 sizeof (struct ppc_link_hash_entry),
3975 PPC64_ELF_DATA))
3976 {
3977 free (htab);
3978 return NULL;
3979 }
3980
3981 /* Init the stub hash table too. */
3982 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc,
3983 sizeof (struct ppc_stub_hash_entry)))
3984 return NULL;
3985
3986 /* And the branch hash table. */
3987 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc,
3988 sizeof (struct ppc_branch_hash_entry)))
3989 return NULL;
3990
3991 /* Initializing two fields of the union is just cosmetic. We really
3992 only care about glist, but when compiled on a 32-bit host the
3993 bfd_vma fields are larger. Setting the bfd_vma to zero makes
3994 debugger inspection of these fields look nicer. */
3995 htab->elf.init_got_refcount.refcount = 0;
3996 htab->elf.init_got_refcount.glist = NULL;
3997 htab->elf.init_plt_refcount.refcount = 0;
3998 htab->elf.init_plt_refcount.glist = NULL;
3999 htab->elf.init_got_offset.offset = 0;
4000 htab->elf.init_got_offset.glist = NULL;
4001 htab->elf.init_plt_offset.offset = 0;
4002 htab->elf.init_plt_offset.glist = NULL;
4003
4004 return &htab->elf.root;
4005 }
4006
4007 /* Free the derived linker hash table. */
4008
4009 static void
4010 ppc64_elf_link_hash_table_free (struct bfd_link_hash_table *hash)
4011 {
4012 struct ppc_link_hash_table *ret = (struct ppc_link_hash_table *) hash;
4013
4014 bfd_hash_table_free (&ret->stub_hash_table);
4015 bfd_hash_table_free (&ret->branch_hash_table);
4016 _bfd_generic_link_hash_table_free (hash);
4017 }
4018
4019 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
4020
4021 void
4022 ppc64_elf_init_stub_bfd (bfd *abfd, struct bfd_link_info *info)
4023 {
4024 struct ppc_link_hash_table *htab;
4025
4026 elf_elfheader (abfd)->e_ident[EI_CLASS] = ELFCLASS64;
4027
4028 /* Always hook our dynamic sections into the first bfd, which is the
4029 linker created stub bfd. This ensures that the GOT header is at
4030 the start of the output TOC section. */
4031 htab = ppc_hash_table (info);
4032 if (htab == NULL)
4033 return;
4034 htab->stub_bfd = abfd;
4035 htab->elf.dynobj = abfd;
4036 }
4037
4038 /* Build a name for an entry in the stub hash table. */
4039
4040 static char *
4041 ppc_stub_name (const asection *input_section,
4042 const asection *sym_sec,
4043 const struct ppc_link_hash_entry *h,
4044 const Elf_Internal_Rela *rel)
4045 {
4046 char *stub_name;
4047 bfd_size_type len;
4048
4049 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
4050 offsets from a sym as a branch target? In fact, we could
4051 probably assume the addend is always zero. */
4052 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
4053
4054 if (h)
4055 {
4056 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
4057 stub_name = bfd_malloc (len);
4058 if (stub_name == NULL)
4059 return stub_name;
4060
4061 sprintf (stub_name, "%08x.%s+%x",
4062 input_section->id & 0xffffffff,
4063 h->elf.root.root.string,
4064 (int) rel->r_addend & 0xffffffff);
4065 }
4066 else
4067 {
4068 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
4069 stub_name = bfd_malloc (len);
4070 if (stub_name == NULL)
4071 return stub_name;
4072
4073 sprintf (stub_name, "%08x.%x:%x+%x",
4074 input_section->id & 0xffffffff,
4075 sym_sec->id & 0xffffffff,
4076 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
4077 (int) rel->r_addend & 0xffffffff);
4078 }
4079 if (stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
4080 stub_name[len - 2] = 0;
4081 return stub_name;
4082 }
4083
4084 /* Look up an entry in the stub hash. Stub entries are cached because
4085 creating the stub name takes a bit of time. */
4086
4087 static struct ppc_stub_hash_entry *
4088 ppc_get_stub_entry (const asection *input_section,
4089 const asection *sym_sec,
4090 struct ppc_link_hash_entry *h,
4091 const Elf_Internal_Rela *rel,
4092 struct ppc_link_hash_table *htab)
4093 {
4094 struct ppc_stub_hash_entry *stub_entry;
4095 const asection *id_sec;
4096
4097 /* If this input section is part of a group of sections sharing one
4098 stub section, then use the id of the first section in the group.
4099 Stub names need to include a section id, as there may well be
4100 more than one stub used to reach say, printf, and we need to
4101 distinguish between them. */
4102 id_sec = htab->stub_group[input_section->id].link_sec;
4103
4104 if (h != NULL && h->u.stub_cache != NULL
4105 && h->u.stub_cache->h == h
4106 && h->u.stub_cache->id_sec == id_sec)
4107 {
4108 stub_entry = h->u.stub_cache;
4109 }
4110 else
4111 {
4112 char *stub_name;
4113
4114 stub_name = ppc_stub_name (id_sec, sym_sec, h, rel);
4115 if (stub_name == NULL)
4116 return NULL;
4117
4118 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
4119 stub_name, FALSE, FALSE);
4120 if (h != NULL)
4121 h->u.stub_cache = stub_entry;
4122
4123 free (stub_name);
4124 }
4125
4126 return stub_entry;
4127 }
4128
4129 /* Add a new stub entry to the stub hash. Not all fields of the new
4130 stub entry are initialised. */
4131
4132 static struct ppc_stub_hash_entry *
4133 ppc_add_stub (const char *stub_name,
4134 asection *section,
4135 struct ppc_link_hash_table *htab)
4136 {
4137 asection *link_sec;
4138 asection *stub_sec;
4139 struct ppc_stub_hash_entry *stub_entry;
4140
4141 link_sec = htab->stub_group[section->id].link_sec;
4142 stub_sec = htab->stub_group[section->id].stub_sec;
4143 if (stub_sec == NULL)
4144 {
4145 stub_sec = htab->stub_group[link_sec->id].stub_sec;
4146 if (stub_sec == NULL)
4147 {
4148 size_t namelen;
4149 bfd_size_type len;
4150 char *s_name;
4151
4152 namelen = strlen (link_sec->name);
4153 len = namelen + sizeof (STUB_SUFFIX);
4154 s_name = bfd_alloc (htab->stub_bfd, len);
4155 if (s_name == NULL)
4156 return NULL;
4157
4158 memcpy (s_name, link_sec->name, namelen);
4159 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
4160 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
4161 if (stub_sec == NULL)
4162 return NULL;
4163 htab->stub_group[link_sec->id].stub_sec = stub_sec;
4164 }
4165 htab->stub_group[section->id].stub_sec = stub_sec;
4166 }
4167
4168 /* Enter this entry into the linker stub hash table. */
4169 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
4170 TRUE, FALSE);
4171 if (stub_entry == NULL)
4172 {
4173 (*_bfd_error_handler) (_("%B: cannot create stub entry %s"),
4174 section->owner, stub_name);
4175 return NULL;
4176 }
4177
4178 stub_entry->stub_sec = stub_sec;
4179 stub_entry->stub_offset = 0;
4180 stub_entry->id_sec = link_sec;
4181 return stub_entry;
4182 }
4183
4184 /* Create sections for linker generated code. */
4185
4186 static bfd_boolean
4187 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
4188 {
4189 struct ppc_link_hash_table *htab;
4190 flagword flags;
4191
4192 htab = ppc_hash_table (info);
4193 if (htab == NULL)
4194 return FALSE;
4195
4196 /* Create .sfpr for code to save and restore fp regs. */
4197 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
4198 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4199 htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr",
4200 flags);
4201 if (htab->sfpr == NULL
4202 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
4203 return FALSE;
4204
4205 /* Create .glink for lazy dynamic linking support. */
4206 htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink",
4207 flags);
4208 if (htab->glink == NULL
4209 || ! bfd_set_section_alignment (dynobj, htab->glink, 3))
4210 return FALSE;
4211
4212 flags = SEC_ALLOC | SEC_LINKER_CREATED;
4213 htab->iplt = bfd_make_section_anyway_with_flags (dynobj, ".iplt", flags);
4214 if (htab->iplt == NULL
4215 || ! bfd_set_section_alignment (dynobj, htab->iplt, 3))
4216 return FALSE;
4217
4218 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4219 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4220 htab->reliplt = bfd_make_section_anyway_with_flags (dynobj,
4221 ".rela.iplt",
4222 flags);
4223 if (htab->reliplt == NULL
4224 || ! bfd_set_section_alignment (dynobj, htab->reliplt, 3))
4225 return FALSE;
4226
4227 /* Create branch lookup table for plt_branch stubs. */
4228 flags = (SEC_ALLOC | SEC_LOAD
4229 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4230 htab->brlt = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt",
4231 flags);
4232 if (htab->brlt == NULL
4233 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
4234 return FALSE;
4235
4236 if (!info->shared)
4237 return TRUE;
4238
4239 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4240 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4241 htab->relbrlt = bfd_make_section_anyway_with_flags (dynobj,
4242 ".rela.branch_lt",
4243 flags);
4244 if (htab->relbrlt == NULL
4245 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
4246 return FALSE;
4247
4248 return TRUE;
4249 }
4250
4251 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
4252 not already done. */
4253
4254 static bfd_boolean
4255 create_got_section (bfd *abfd, struct bfd_link_info *info)
4256 {
4257 asection *got, *relgot;
4258 flagword flags;
4259 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4260
4261 if (!is_ppc64_elf (abfd))
4262 return FALSE;
4263 if (htab == NULL)
4264 return FALSE;
4265
4266 if (!htab->got)
4267 {
4268 if (! _bfd_elf_create_got_section (htab->elf.dynobj, info))
4269 return FALSE;
4270
4271 htab->got = bfd_get_section_by_name (htab->elf.dynobj, ".got");
4272 if (!htab->got)
4273 abort ();
4274 }
4275
4276 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
4277 | SEC_LINKER_CREATED);
4278
4279 got = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
4280 if (!got
4281 || !bfd_set_section_alignment (abfd, got, 3))
4282 return FALSE;
4283
4284 relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got",
4285 flags | SEC_READONLY);
4286 if (!relgot
4287 || ! bfd_set_section_alignment (abfd, relgot, 3))
4288 return FALSE;
4289
4290 ppc64_elf_tdata (abfd)->got = got;
4291 ppc64_elf_tdata (abfd)->relgot = relgot;
4292 return TRUE;
4293 }
4294
4295 /* Create the dynamic sections, and set up shortcuts. */
4296
4297 static bfd_boolean
4298 ppc64_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
4299 {
4300 struct ppc_link_hash_table *htab;
4301
4302 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
4303 return FALSE;
4304
4305 htab = ppc_hash_table (info);
4306 if (htab == NULL)
4307 return FALSE;
4308
4309 if (!htab->got)
4310 htab->got = bfd_get_section_by_name (dynobj, ".got");
4311 htab->plt = bfd_get_section_by_name (dynobj, ".plt");
4312 htab->relplt = bfd_get_section_by_name (dynobj, ".rela.plt");
4313 htab->dynbss = bfd_get_section_by_name (dynobj, ".dynbss");
4314 if (!info->shared)
4315 htab->relbss = bfd_get_section_by_name (dynobj, ".rela.bss");
4316
4317 if (!htab->got || !htab->plt || !htab->relplt || !htab->dynbss
4318 || (!info->shared && !htab->relbss))
4319 abort ();
4320
4321 return TRUE;
4322 }
4323
4324 /* Follow indirect and warning symbol links. */
4325
4326 static inline struct bfd_link_hash_entry *
4327 follow_link (struct bfd_link_hash_entry *h)
4328 {
4329 while (h->type == bfd_link_hash_indirect
4330 || h->type == bfd_link_hash_warning)
4331 h = h->u.i.link;
4332 return h;
4333 }
4334
4335 static inline struct elf_link_hash_entry *
4336 elf_follow_link (struct elf_link_hash_entry *h)
4337 {
4338 return (struct elf_link_hash_entry *) follow_link (&h->root);
4339 }
4340
4341 static inline struct ppc_link_hash_entry *
4342 ppc_follow_link (struct ppc_link_hash_entry *h)
4343 {
4344 return (struct ppc_link_hash_entry *) follow_link (&h->elf.root);
4345 }
4346
4347 /* Merge PLT info on FROM with that on TO. */
4348
4349 static void
4350 move_plt_plist (struct ppc_link_hash_entry *from,
4351 struct ppc_link_hash_entry *to)
4352 {
4353 if (from->elf.plt.plist != NULL)
4354 {
4355 if (to->elf.plt.plist != NULL)
4356 {
4357 struct plt_entry **entp;
4358 struct plt_entry *ent;
4359
4360 for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; )
4361 {
4362 struct plt_entry *dent;
4363
4364 for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next)
4365 if (dent->addend == ent->addend)
4366 {
4367 dent->plt.refcount += ent->plt.refcount;
4368 *entp = ent->next;
4369 break;
4370 }
4371 if (dent == NULL)
4372 entp = &ent->next;
4373 }
4374 *entp = to->elf.plt.plist;
4375 }
4376
4377 to->elf.plt.plist = from->elf.plt.plist;
4378 from->elf.plt.plist = NULL;
4379 }
4380 }
4381
4382 /* Copy the extra info we tack onto an elf_link_hash_entry. */
4383
4384 static void
4385 ppc64_elf_copy_indirect_symbol (struct bfd_link_info *info,
4386 struct elf_link_hash_entry *dir,
4387 struct elf_link_hash_entry *ind)
4388 {
4389 struct ppc_link_hash_entry *edir, *eind;
4390
4391 edir = (struct ppc_link_hash_entry *) dir;
4392 eind = (struct ppc_link_hash_entry *) ind;
4393
4394 /* Copy over any dynamic relocs we may have on the indirect sym. */
4395 if (eind->dyn_relocs != NULL)
4396 {
4397 if (edir->dyn_relocs != NULL)
4398 {
4399 struct ppc_dyn_relocs **pp;
4400 struct ppc_dyn_relocs *p;
4401
4402 /* Add reloc counts against the indirect sym to the direct sym
4403 list. Merge any entries against the same section. */
4404 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
4405 {
4406 struct ppc_dyn_relocs *q;
4407
4408 for (q = edir->dyn_relocs; q != NULL; q = q->next)
4409 if (q->sec == p->sec)
4410 {
4411 q->pc_count += p->pc_count;
4412 q->count += p->count;
4413 *pp = p->next;
4414 break;
4415 }
4416 if (q == NULL)
4417 pp = &p->next;
4418 }
4419 *pp = edir->dyn_relocs;
4420 }
4421
4422 edir->dyn_relocs = eind->dyn_relocs;
4423 eind->dyn_relocs = NULL;
4424 }
4425
4426 edir->is_func |= eind->is_func;
4427 edir->is_func_descriptor |= eind->is_func_descriptor;
4428 edir->tls_mask |= eind->tls_mask;
4429 if (eind->oh != NULL)
4430 edir->oh = ppc_follow_link (eind->oh);
4431
4432 /* If called to transfer flags for a weakdef during processing
4433 of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF.
4434 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
4435 if (!(ELIMINATE_COPY_RELOCS
4436 && eind->elf.root.type != bfd_link_hash_indirect
4437 && edir->elf.dynamic_adjusted))
4438 edir->elf.non_got_ref |= eind->elf.non_got_ref;
4439
4440 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
4441 edir->elf.ref_regular |= eind->elf.ref_regular;
4442 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
4443 edir->elf.needs_plt |= eind->elf.needs_plt;
4444
4445 /* If we were called to copy over info for a weak sym, that's all. */
4446 if (eind->elf.root.type != bfd_link_hash_indirect)
4447 return;
4448
4449 /* Copy over got entries that we may have already seen to the
4450 symbol which just became indirect. */
4451 if (eind->elf.got.glist != NULL)
4452 {
4453 if (edir->elf.got.glist != NULL)
4454 {
4455 struct got_entry **entp;
4456 struct got_entry *ent;
4457
4458 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
4459 {
4460 struct got_entry *dent;
4461
4462 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
4463 if (dent->addend == ent->addend
4464 && dent->owner == ent->owner
4465 && dent->tls_type == ent->tls_type)
4466 {
4467 dent->got.refcount += ent->got.refcount;
4468 *entp = ent->next;
4469 break;
4470 }
4471 if (dent == NULL)
4472 entp = &ent->next;
4473 }
4474 *entp = edir->elf.got.glist;
4475 }
4476
4477 edir->elf.got.glist = eind->elf.got.glist;
4478 eind->elf.got.glist = NULL;
4479 }
4480
4481 /* And plt entries. */
4482 move_plt_plist (eind, edir);
4483
4484 if (eind->elf.dynindx != -1)
4485 {
4486 if (edir->elf.dynindx != -1)
4487 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4488 edir->elf.dynstr_index);
4489 edir->elf.dynindx = eind->elf.dynindx;
4490 edir->elf.dynstr_index = eind->elf.dynstr_index;
4491 eind->elf.dynindx = -1;
4492 eind->elf.dynstr_index = 0;
4493 }
4494 }
4495
4496 /* Find the function descriptor hash entry from the given function code
4497 hash entry FH. Link the entries via their OH fields. */
4498
4499 static struct ppc_link_hash_entry *
4500 lookup_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
4501 {
4502 struct ppc_link_hash_entry *fdh = fh->oh;
4503
4504 if (fdh == NULL)
4505 {
4506 const char *fd_name = fh->elf.root.root.string + 1;
4507
4508 fdh = (struct ppc_link_hash_entry *)
4509 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
4510 if (fdh == NULL)
4511 return fdh;
4512
4513 fdh->is_func_descriptor = 1;
4514 fdh->oh = fh;
4515 fh->is_func = 1;
4516 fh->oh = fdh;
4517 }
4518
4519 return ppc_follow_link (fdh);
4520 }
4521
4522 /* Make a fake function descriptor sym for the code sym FH. */
4523
4524 static struct ppc_link_hash_entry *
4525 make_fdh (struct bfd_link_info *info,
4526 struct ppc_link_hash_entry *fh)
4527 {
4528 bfd *abfd;
4529 asymbol *newsym;
4530 struct bfd_link_hash_entry *bh;
4531 struct ppc_link_hash_entry *fdh;
4532
4533 abfd = fh->elf.root.u.undef.abfd;
4534 newsym = bfd_make_empty_symbol (abfd);
4535 newsym->name = fh->elf.root.root.string + 1;
4536 newsym->section = bfd_und_section_ptr;
4537 newsym->value = 0;
4538 newsym->flags = BSF_WEAK;
4539
4540 bh = NULL;
4541 if (!_bfd_generic_link_add_one_symbol (info, abfd, newsym->name,
4542 newsym->flags, newsym->section,
4543 newsym->value, NULL, FALSE, FALSE,
4544 &bh))
4545 return NULL;
4546
4547 fdh = (struct ppc_link_hash_entry *) bh;
4548 fdh->elf.non_elf = 0;
4549 fdh->fake = 1;
4550 fdh->is_func_descriptor = 1;
4551 fdh->oh = fh;
4552 fh->is_func = 1;
4553 fh->oh = fdh;
4554 return fdh;
4555 }
4556
4557 /* Fix function descriptor symbols defined in .opd sections to be
4558 function type. */
4559
4560 static bfd_boolean
4561 ppc64_elf_add_symbol_hook (bfd *ibfd,
4562 struct bfd_link_info *info,
4563 Elf_Internal_Sym *isym,
4564 const char **name ATTRIBUTE_UNUSED,
4565 flagword *flags ATTRIBUTE_UNUSED,
4566 asection **sec,
4567 bfd_vma *value ATTRIBUTE_UNUSED)
4568 {
4569 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
4570 {
4571 if ((ibfd->flags & DYNAMIC) == 0)
4572 elf_tdata (info->output_bfd)->has_ifunc_symbols = TRUE;
4573 }
4574 else if (ELF_ST_TYPE (isym->st_info) == STT_FUNC)
4575 ;
4576 else if (*sec != NULL
4577 && strcmp ((*sec)->name, ".opd") == 0)
4578 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
4579
4580 return TRUE;
4581 }
4582
4583 /* This function makes an old ABI object reference to ".bar" cause the
4584 inclusion of a new ABI object archive that defines "bar".
4585 NAME is a symbol defined in an archive. Return a symbol in the hash
4586 table that might be satisfied by the archive symbols. */
4587
4588 static struct elf_link_hash_entry *
4589 ppc64_elf_archive_symbol_lookup (bfd *abfd,
4590 struct bfd_link_info *info,
4591 const char *name)
4592 {
4593 struct elf_link_hash_entry *h;
4594 char *dot_name;
4595 size_t len;
4596
4597 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
4598 if (h != NULL
4599 /* Don't return this sym if it is a fake function descriptor
4600 created by add_symbol_adjust. */
4601 && !(h->root.type == bfd_link_hash_undefweak
4602 && ((struct ppc_link_hash_entry *) h)->fake))
4603 return h;
4604
4605 if (name[0] == '.')
4606 return h;
4607
4608 len = strlen (name);
4609 dot_name = bfd_alloc (abfd, len + 2);
4610 if (dot_name == NULL)
4611 return (struct elf_link_hash_entry *) 0 - 1;
4612 dot_name[0] = '.';
4613 memcpy (dot_name + 1, name, len + 1);
4614 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
4615 bfd_release (abfd, dot_name);
4616 return h;
4617 }
4618
4619 /* This function satisfies all old ABI object references to ".bar" if a
4620 new ABI object defines "bar". Well, at least, undefined dot symbols
4621 are made weak. This stops later archive searches from including an
4622 object if we already have a function descriptor definition. It also
4623 prevents the linker complaining about undefined symbols.
4624 We also check and correct mismatched symbol visibility here. The
4625 most restrictive visibility of the function descriptor and the
4626 function entry symbol is used. */
4627
4628 static bfd_boolean
4629 add_symbol_adjust (struct ppc_link_hash_entry *eh, struct bfd_link_info *info)
4630 {
4631 struct ppc_link_hash_table *htab;
4632 struct ppc_link_hash_entry *fdh;
4633
4634 if (eh->elf.root.type == bfd_link_hash_indirect)
4635 return TRUE;
4636
4637 if (eh->elf.root.type == bfd_link_hash_warning)
4638 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
4639
4640 if (eh->elf.root.root.string[0] != '.')
4641 abort ();
4642
4643 htab = ppc_hash_table (info);
4644 if (htab == NULL)
4645 return FALSE;
4646
4647 fdh = lookup_fdh (eh, htab);
4648 if (fdh == NULL)
4649 {
4650 if (!info->relocatable
4651 && (eh->elf.root.type == bfd_link_hash_undefined
4652 || eh->elf.root.type == bfd_link_hash_undefweak)
4653 && eh->elf.ref_regular)
4654 {
4655 /* Make an undefweak function descriptor sym, which is enough to
4656 pull in an --as-needed shared lib, but won't cause link
4657 errors. Archives are handled elsewhere. */
4658 fdh = make_fdh (info, eh);
4659 if (fdh == NULL)
4660 return FALSE;
4661 fdh->elf.ref_regular = 1;
4662 }
4663 }
4664 else
4665 {
4666 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
4667 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
4668 if (entry_vis < descr_vis)
4669 fdh->elf.other += entry_vis - descr_vis;
4670 else if (entry_vis > descr_vis)
4671 eh->elf.other += descr_vis - entry_vis;
4672
4673 if ((fdh->elf.root.type == bfd_link_hash_defined
4674 || fdh->elf.root.type == bfd_link_hash_defweak)
4675 && eh->elf.root.type == bfd_link_hash_undefined)
4676 {
4677 eh->elf.root.type = bfd_link_hash_undefweak;
4678 eh->was_undefined = 1;
4679 htab->twiddled_syms = 1;
4680 }
4681 }
4682
4683 return TRUE;
4684 }
4685
4686 /* Process list of dot-symbols we made in link_hash_newfunc. */
4687
4688 static bfd_boolean
4689 ppc64_elf_process_dot_syms (bfd *ibfd, struct bfd_link_info *info)
4690 {
4691 struct ppc_link_hash_table *htab;
4692 struct ppc_link_hash_entry **p, *eh;
4693
4694 if (!is_ppc64_elf (info->output_bfd))
4695 return TRUE;
4696 htab = ppc_hash_table (info);
4697 if (htab == NULL)
4698 return FALSE;
4699
4700 if (is_ppc64_elf (ibfd))
4701 {
4702 p = &htab->dot_syms;
4703 while ((eh = *p) != NULL)
4704 {
4705 *p = NULL;
4706 if (!add_symbol_adjust (eh, info))
4707 return FALSE;
4708 p = &eh->u.next_dot_sym;
4709 }
4710 }
4711
4712 /* Clear the list for non-ppc64 input files. */
4713 p = &htab->dot_syms;
4714 while ((eh = *p) != NULL)
4715 {
4716 *p = NULL;
4717 p = &eh->u.next_dot_sym;
4718 }
4719
4720 /* We need to fix the undefs list for any syms we have twiddled to
4721 undef_weak. */
4722 if (htab->twiddled_syms)
4723 {
4724 bfd_link_repair_undef_list (&htab->elf.root);
4725 htab->twiddled_syms = 0;
4726 }
4727 return TRUE;
4728 }
4729
4730 /* Undo hash table changes when an --as-needed input file is determined
4731 not to be needed. */
4732
4733 static bfd_boolean
4734 ppc64_elf_as_needed_cleanup (bfd *ibfd ATTRIBUTE_UNUSED,
4735 struct bfd_link_info *info)
4736 {
4737 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4738
4739 if (htab == NULL)
4740 return FALSE;
4741
4742 htab->dot_syms = NULL;
4743 return TRUE;
4744 }
4745
4746 static struct plt_entry **
4747 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
4748 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
4749 {
4750 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
4751 struct plt_entry **local_plt;
4752 unsigned char *local_got_tls_masks;
4753
4754 if (local_got_ents == NULL)
4755 {
4756 bfd_size_type size = symtab_hdr->sh_info;
4757
4758 size *= (sizeof (*local_got_ents)
4759 + sizeof (*local_plt)
4760 + sizeof (*local_got_tls_masks));
4761 local_got_ents = bfd_zalloc (abfd, size);
4762 if (local_got_ents == NULL)
4763 return NULL;
4764 elf_local_got_ents (abfd) = local_got_ents;
4765 }
4766
4767 if ((tls_type & (PLT_IFUNC | TLS_EXPLICIT)) == 0)
4768 {
4769 struct got_entry *ent;
4770
4771 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
4772 if (ent->addend == r_addend
4773 && ent->owner == abfd
4774 && ent->tls_type == tls_type)
4775 break;
4776 if (ent == NULL)
4777 {
4778 bfd_size_type amt = sizeof (*ent);
4779 ent = bfd_alloc (abfd, amt);
4780 if (ent == NULL)
4781 return FALSE;
4782 ent->next = local_got_ents[r_symndx];
4783 ent->addend = r_addend;
4784 ent->owner = abfd;
4785 ent->tls_type = tls_type;
4786 ent->is_indirect = FALSE;
4787 ent->got.refcount = 0;
4788 local_got_ents[r_symndx] = ent;
4789 }
4790 ent->got.refcount += 1;
4791 }
4792
4793 local_plt = (struct plt_entry **) (local_got_ents + symtab_hdr->sh_info);
4794 local_got_tls_masks = (unsigned char *) (local_plt + symtab_hdr->sh_info);
4795 local_got_tls_masks[r_symndx] |= tls_type;
4796
4797 return local_plt + r_symndx;
4798 }
4799
4800 static bfd_boolean
4801 update_plt_info (bfd *abfd, struct plt_entry **plist, bfd_vma addend)
4802 {
4803 struct plt_entry *ent;
4804
4805 for (ent = *plist; ent != NULL; ent = ent->next)
4806 if (ent->addend == addend)
4807 break;
4808 if (ent == NULL)
4809 {
4810 bfd_size_type amt = sizeof (*ent);
4811 ent = bfd_alloc (abfd, amt);
4812 if (ent == NULL)
4813 return FALSE;
4814 ent->next = *plist;
4815 ent->addend = addend;
4816 ent->plt.refcount = 0;
4817 *plist = ent;
4818 }
4819 ent->plt.refcount += 1;
4820 return TRUE;
4821 }
4822
4823 static bfd_boolean
4824 is_branch_reloc (enum elf_ppc64_reloc_type r_type)
4825 {
4826 return (r_type == R_PPC64_REL24
4827 || r_type == R_PPC64_REL14
4828 || r_type == R_PPC64_REL14_BRTAKEN
4829 || r_type == R_PPC64_REL14_BRNTAKEN
4830 || r_type == R_PPC64_ADDR24
4831 || r_type == R_PPC64_ADDR14
4832 || r_type == R_PPC64_ADDR14_BRTAKEN
4833 || r_type == R_PPC64_ADDR14_BRNTAKEN);
4834 }
4835
4836 /* Look through the relocs for a section during the first phase, and
4837 calculate needed space in the global offset table, procedure
4838 linkage table, and dynamic reloc sections. */
4839
4840 static bfd_boolean
4841 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
4842 asection *sec, const Elf_Internal_Rela *relocs)
4843 {
4844 struct ppc_link_hash_table *htab;
4845 Elf_Internal_Shdr *symtab_hdr;
4846 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
4847 const Elf_Internal_Rela *rel;
4848 const Elf_Internal_Rela *rel_end;
4849 asection *sreloc;
4850 asection **opd_sym_map;
4851 struct elf_link_hash_entry *tga, *dottga;
4852
4853 if (info->relocatable)
4854 return TRUE;
4855
4856 /* Don't do anything special with non-loaded, non-alloced sections.
4857 In particular, any relocs in such sections should not affect GOT
4858 and PLT reference counting (ie. we don't allow them to create GOT
4859 or PLT entries), there's no possibility or desire to optimize TLS
4860 relocs, and there's not much point in propagating relocs to shared
4861 libs that the dynamic linker won't relocate. */
4862 if ((sec->flags & SEC_ALLOC) == 0)
4863 return TRUE;
4864
4865 BFD_ASSERT (is_ppc64_elf (abfd));
4866
4867 htab = ppc_hash_table (info);
4868 if (htab == NULL)
4869 return FALSE;
4870
4871 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
4872 FALSE, FALSE, TRUE);
4873 dottga = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
4874 FALSE, FALSE, TRUE);
4875 symtab_hdr = &elf_symtab_hdr (abfd);
4876
4877 sym_hashes = elf_sym_hashes (abfd);
4878 sym_hashes_end = (sym_hashes
4879 + symtab_hdr->sh_size / sizeof (Elf64_External_Sym)
4880 - symtab_hdr->sh_info);
4881
4882 sreloc = NULL;
4883 opd_sym_map = NULL;
4884 if (strcmp (sec->name, ".opd") == 0)
4885 {
4886 /* Garbage collection needs some extra help with .opd sections.
4887 We don't want to necessarily keep everything referenced by
4888 relocs in .opd, as that would keep all functions. Instead,
4889 if we reference an .opd symbol (a function descriptor), we
4890 want to keep the function code symbol's section. This is
4891 easy for global symbols, but for local syms we need to keep
4892 information about the associated function section. */
4893 bfd_size_type amt;
4894
4895 amt = sec->size * sizeof (*opd_sym_map) / 8;
4896 opd_sym_map = bfd_zalloc (abfd, amt);
4897 if (opd_sym_map == NULL)
4898 return FALSE;
4899 ppc64_elf_section_data (sec)->u.opd.func_sec = opd_sym_map;
4900 BFD_ASSERT (ppc64_elf_section_data (sec)->sec_type == sec_normal);
4901 ppc64_elf_section_data (sec)->sec_type = sec_opd;
4902 }
4903
4904 if (htab->sfpr == NULL
4905 && !create_linkage_sections (htab->elf.dynobj, info))
4906 return FALSE;
4907
4908 rel_end = relocs + sec->reloc_count;
4909 for (rel = relocs; rel < rel_end; rel++)
4910 {
4911 unsigned long r_symndx;
4912 struct elf_link_hash_entry *h;
4913 enum elf_ppc64_reloc_type r_type;
4914 int tls_type;
4915 struct _ppc64_elf_section_data *ppc64_sec;
4916 struct plt_entry **ifunc;
4917
4918 r_symndx = ELF64_R_SYM (rel->r_info);
4919 if (r_symndx < symtab_hdr->sh_info)
4920 h = NULL;
4921 else
4922 {
4923 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4924 h = elf_follow_link (h);
4925 }
4926
4927 tls_type = 0;
4928 ifunc = NULL;
4929 if (h != NULL)
4930 {
4931 if (h->type == STT_GNU_IFUNC)
4932 {
4933 h->needs_plt = 1;
4934 ifunc = &h->plt.plist;
4935 }
4936 }
4937 else
4938 {
4939 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4940 abfd, r_symndx);
4941 if (isym == NULL)
4942 return FALSE;
4943
4944 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
4945 {
4946 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
4947 rel->r_addend, PLT_IFUNC);
4948 if (ifunc == NULL)
4949 return FALSE;
4950 }
4951 }
4952 r_type = ELF64_R_TYPE (rel->r_info);
4953 if (is_branch_reloc (r_type))
4954 {
4955 if (h != NULL && (h == tga || h == dottga))
4956 {
4957 if (rel != relocs
4958 && (ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSGD
4959 || ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSLD))
4960 /* We have a new-style __tls_get_addr call with a marker
4961 reloc. */
4962 ;
4963 else
4964 /* Mark this section as having an old-style call. */
4965 sec->has_tls_get_addr_call = 1;
4966 }
4967
4968 /* STT_GNU_IFUNC symbols must have a PLT entry. */
4969 if (ifunc != NULL
4970 && !update_plt_info (abfd, ifunc, rel->r_addend))
4971 return FALSE;
4972 }
4973
4974 switch (r_type)
4975 {
4976 case R_PPC64_TLSGD:
4977 case R_PPC64_TLSLD:
4978 /* These special tls relocs tie a call to __tls_get_addr with
4979 its parameter symbol. */
4980 break;
4981
4982 case R_PPC64_GOT_TLSLD16:
4983 case R_PPC64_GOT_TLSLD16_LO:
4984 case R_PPC64_GOT_TLSLD16_HI:
4985 case R_PPC64_GOT_TLSLD16_HA:
4986 tls_type = TLS_TLS | TLS_LD;
4987 goto dogottls;
4988
4989 case R_PPC64_GOT_TLSGD16:
4990 case R_PPC64_GOT_TLSGD16_LO:
4991 case R_PPC64_GOT_TLSGD16_HI:
4992 case R_PPC64_GOT_TLSGD16_HA:
4993 tls_type = TLS_TLS | TLS_GD;
4994 goto dogottls;
4995
4996 case R_PPC64_GOT_TPREL16_DS:
4997 case R_PPC64_GOT_TPREL16_LO_DS:
4998 case R_PPC64_GOT_TPREL16_HI:
4999 case R_PPC64_GOT_TPREL16_HA:
5000 if (!info->executable)
5001 info->flags |= DF_STATIC_TLS;
5002 tls_type = TLS_TLS | TLS_TPREL;
5003 goto dogottls;
5004
5005 case R_PPC64_GOT_DTPREL16_DS:
5006 case R_PPC64_GOT_DTPREL16_LO_DS:
5007 case R_PPC64_GOT_DTPREL16_HI:
5008 case R_PPC64_GOT_DTPREL16_HA:
5009 tls_type = TLS_TLS | TLS_DTPREL;
5010 dogottls:
5011 sec->has_tls_reloc = 1;
5012 /* Fall thru */
5013
5014 case R_PPC64_GOT16:
5015 case R_PPC64_GOT16_DS:
5016 case R_PPC64_GOT16_HA:
5017 case R_PPC64_GOT16_HI:
5018 case R_PPC64_GOT16_LO:
5019 case R_PPC64_GOT16_LO_DS:
5020 /* This symbol requires a global offset table entry. */
5021 sec->has_toc_reloc = 1;
5022 if (r_type == R_PPC64_GOT_TLSLD16
5023 || r_type == R_PPC64_GOT_TLSGD16
5024 || r_type == R_PPC64_GOT_TPREL16_DS
5025 || r_type == R_PPC64_GOT_DTPREL16_DS
5026 || r_type == R_PPC64_GOT16
5027 || r_type == R_PPC64_GOT16_DS)
5028 {
5029 htab->do_multi_toc = 1;
5030 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5031 }
5032
5033 if (ppc64_elf_tdata (abfd)->got == NULL
5034 && !create_got_section (abfd, info))
5035 return FALSE;
5036
5037 if (h != NULL)
5038 {
5039 struct ppc_link_hash_entry *eh;
5040 struct got_entry *ent;
5041
5042 eh = (struct ppc_link_hash_entry *) h;
5043 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
5044 if (ent->addend == rel->r_addend
5045 && ent->owner == abfd
5046 && ent->tls_type == tls_type)
5047 break;
5048 if (ent == NULL)
5049 {
5050 bfd_size_type amt = sizeof (*ent);
5051 ent = bfd_alloc (abfd, amt);
5052 if (ent == NULL)
5053 return FALSE;
5054 ent->next = eh->elf.got.glist;
5055 ent->addend = rel->r_addend;
5056 ent->owner = abfd;
5057 ent->tls_type = tls_type;
5058 ent->is_indirect = FALSE;
5059 ent->got.refcount = 0;
5060 eh->elf.got.glist = ent;
5061 }
5062 ent->got.refcount += 1;
5063 eh->tls_mask |= tls_type;
5064 }
5065 else
5066 /* This is a global offset table entry for a local symbol. */
5067 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5068 rel->r_addend, tls_type))
5069 return FALSE;
5070 break;
5071
5072 case R_PPC64_PLT16_HA:
5073 case R_PPC64_PLT16_HI:
5074 case R_PPC64_PLT16_LO:
5075 case R_PPC64_PLT32:
5076 case R_PPC64_PLT64:
5077 /* This symbol requires a procedure linkage table entry. We
5078 actually build the entry in adjust_dynamic_symbol,
5079 because this might be a case of linking PIC code without
5080 linking in any dynamic objects, in which case we don't
5081 need to generate a procedure linkage table after all. */
5082 if (h == NULL)
5083 {
5084 /* It does not make sense to have a procedure linkage
5085 table entry for a local symbol. */
5086 bfd_set_error (bfd_error_bad_value);
5087 return FALSE;
5088 }
5089 else
5090 {
5091 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5092 return FALSE;
5093 h->needs_plt = 1;
5094 if (h->root.root.string[0] == '.'
5095 && h->root.root.string[1] != '\0')
5096 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5097 }
5098 break;
5099
5100 /* The following relocations don't need to propagate the
5101 relocation if linking a shared object since they are
5102 section relative. */
5103 case R_PPC64_SECTOFF:
5104 case R_PPC64_SECTOFF_LO:
5105 case R_PPC64_SECTOFF_HI:
5106 case R_PPC64_SECTOFF_HA:
5107 case R_PPC64_SECTOFF_DS:
5108 case R_PPC64_SECTOFF_LO_DS:
5109 case R_PPC64_DTPREL16:
5110 case R_PPC64_DTPREL16_LO:
5111 case R_PPC64_DTPREL16_HI:
5112 case R_PPC64_DTPREL16_HA:
5113 case R_PPC64_DTPREL16_DS:
5114 case R_PPC64_DTPREL16_LO_DS:
5115 case R_PPC64_DTPREL16_HIGHER:
5116 case R_PPC64_DTPREL16_HIGHERA:
5117 case R_PPC64_DTPREL16_HIGHEST:
5118 case R_PPC64_DTPREL16_HIGHESTA:
5119 break;
5120
5121 /* Nor do these. */
5122 case R_PPC64_REL16:
5123 case R_PPC64_REL16_LO:
5124 case R_PPC64_REL16_HI:
5125 case R_PPC64_REL16_HA:
5126 break;
5127
5128 case R_PPC64_TOC16:
5129 case R_PPC64_TOC16_DS:
5130 htab->do_multi_toc = 1;
5131 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5132 case R_PPC64_TOC16_LO:
5133 case R_PPC64_TOC16_HI:
5134 case R_PPC64_TOC16_HA:
5135 case R_PPC64_TOC16_LO_DS:
5136 sec->has_toc_reloc = 1;
5137 break;
5138
5139 /* This relocation describes the C++ object vtable hierarchy.
5140 Reconstruct it for later use during GC. */
5141 case R_PPC64_GNU_VTINHERIT:
5142 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
5143 return FALSE;
5144 break;
5145
5146 /* This relocation describes which C++ vtable entries are actually
5147 used. Record for later use during GC. */
5148 case R_PPC64_GNU_VTENTRY:
5149 BFD_ASSERT (h != NULL);
5150 if (h != NULL
5151 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
5152 return FALSE;
5153 break;
5154
5155 case R_PPC64_REL14:
5156 case R_PPC64_REL14_BRTAKEN:
5157 case R_PPC64_REL14_BRNTAKEN:
5158 {
5159 asection *dest = NULL;
5160
5161 /* Heuristic: If jumping outside our section, chances are
5162 we are going to need a stub. */
5163 if (h != NULL)
5164 {
5165 /* If the sym is weak it may be overridden later, so
5166 don't assume we know where a weak sym lives. */
5167 if (h->root.type == bfd_link_hash_defined)
5168 dest = h->root.u.def.section;
5169 }
5170 else
5171 {
5172 Elf_Internal_Sym *isym;
5173
5174 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5175 abfd, r_symndx);
5176 if (isym == NULL)
5177 return FALSE;
5178
5179 dest = bfd_section_from_elf_index (abfd, isym->st_shndx);
5180 }
5181
5182 if (dest != sec)
5183 ppc64_elf_section_data (sec)->has_14bit_branch = 1;
5184 }
5185 /* Fall through. */
5186
5187 case R_PPC64_REL24:
5188 if (h != NULL && ifunc == NULL)
5189 {
5190 /* We may need a .plt entry if the function this reloc
5191 refers to is in a shared lib. */
5192 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5193 return FALSE;
5194 h->needs_plt = 1;
5195 if (h->root.root.string[0] == '.'
5196 && h->root.root.string[1] != '\0')
5197 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5198 if (h == tga || h == dottga)
5199 sec->has_tls_reloc = 1;
5200 }
5201 break;
5202
5203 case R_PPC64_TPREL64:
5204 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
5205 if (!info->executable)
5206 info->flags |= DF_STATIC_TLS;
5207 goto dotlstoc;
5208
5209 case R_PPC64_DTPMOD64:
5210 if (rel + 1 < rel_end
5211 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
5212 && rel[1].r_offset == rel->r_offset + 8)
5213 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
5214 else
5215 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
5216 goto dotlstoc;
5217
5218 case R_PPC64_DTPREL64:
5219 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
5220 if (rel != relocs
5221 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
5222 && rel[-1].r_offset == rel->r_offset - 8)
5223 /* This is the second reloc of a dtpmod, dtprel pair.
5224 Don't mark with TLS_DTPREL. */
5225 goto dodyn;
5226
5227 dotlstoc:
5228 sec->has_tls_reloc = 1;
5229 if (h != NULL)
5230 {
5231 struct ppc_link_hash_entry *eh;
5232 eh = (struct ppc_link_hash_entry *) h;
5233 eh->tls_mask |= tls_type;
5234 }
5235 else
5236 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5237 rel->r_addend, tls_type))
5238 return FALSE;
5239
5240 ppc64_sec = ppc64_elf_section_data (sec);
5241 if (ppc64_sec->sec_type != sec_toc)
5242 {
5243 bfd_size_type amt;
5244
5245 /* One extra to simplify get_tls_mask. */
5246 amt = sec->size * sizeof (unsigned) / 8 + sizeof (unsigned);
5247 ppc64_sec->u.toc.symndx = bfd_zalloc (abfd, amt);
5248 if (ppc64_sec->u.toc.symndx == NULL)
5249 return FALSE;
5250 amt = sec->size * sizeof (bfd_vma) / 8;
5251 ppc64_sec->u.toc.add = bfd_zalloc (abfd, amt);
5252 if (ppc64_sec->u.toc.add == NULL)
5253 return FALSE;
5254 BFD_ASSERT (ppc64_sec->sec_type == sec_normal);
5255 ppc64_sec->sec_type = sec_toc;
5256 }
5257 BFD_ASSERT (rel->r_offset % 8 == 0);
5258 ppc64_sec->u.toc.symndx[rel->r_offset / 8] = r_symndx;
5259 ppc64_sec->u.toc.add[rel->r_offset / 8] = rel->r_addend;
5260
5261 /* Mark the second slot of a GD or LD entry.
5262 -1 to indicate GD and -2 to indicate LD. */
5263 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
5264 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -1;
5265 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
5266 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -2;
5267 goto dodyn;
5268
5269 case R_PPC64_TPREL16:
5270 case R_PPC64_TPREL16_LO:
5271 case R_PPC64_TPREL16_HI:
5272 case R_PPC64_TPREL16_HA:
5273 case R_PPC64_TPREL16_DS:
5274 case R_PPC64_TPREL16_LO_DS:
5275 case R_PPC64_TPREL16_HIGHER:
5276 case R_PPC64_TPREL16_HIGHERA:
5277 case R_PPC64_TPREL16_HIGHEST:
5278 case R_PPC64_TPREL16_HIGHESTA:
5279 if (info->shared)
5280 {
5281 if (!info->executable)
5282 info->flags |= DF_STATIC_TLS;
5283 goto dodyn;
5284 }
5285 break;
5286
5287 case R_PPC64_ADDR64:
5288 if (opd_sym_map != NULL
5289 && rel + 1 < rel_end
5290 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
5291 {
5292 if (h != NULL)
5293 {
5294 if (h->root.root.string[0] == '.'
5295 && h->root.root.string[1] != 0
5296 && lookup_fdh ((struct ppc_link_hash_entry *) h, htab))
5297 ;
5298 else
5299 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5300 }
5301 else
5302 {
5303 asection *s;
5304 Elf_Internal_Sym *isym;
5305
5306 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5307 abfd, r_symndx);
5308 if (isym == NULL)
5309 return FALSE;
5310
5311 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5312 if (s != NULL && s != sec)
5313 opd_sym_map[rel->r_offset / 8] = s;
5314 }
5315 }
5316 /* Fall through. */
5317
5318 case R_PPC64_REL30:
5319 case R_PPC64_REL32:
5320 case R_PPC64_REL64:
5321 case R_PPC64_ADDR14:
5322 case R_PPC64_ADDR14_BRNTAKEN:
5323 case R_PPC64_ADDR14_BRTAKEN:
5324 case R_PPC64_ADDR16:
5325 case R_PPC64_ADDR16_DS:
5326 case R_PPC64_ADDR16_HA:
5327 case R_PPC64_ADDR16_HI:
5328 case R_PPC64_ADDR16_HIGHER:
5329 case R_PPC64_ADDR16_HIGHERA:
5330 case R_PPC64_ADDR16_HIGHEST:
5331 case R_PPC64_ADDR16_HIGHESTA:
5332 case R_PPC64_ADDR16_LO:
5333 case R_PPC64_ADDR16_LO_DS:
5334 case R_PPC64_ADDR24:
5335 case R_PPC64_ADDR32:
5336 case R_PPC64_UADDR16:
5337 case R_PPC64_UADDR32:
5338 case R_PPC64_UADDR64:
5339 case R_PPC64_TOC:
5340 if (h != NULL && !info->shared)
5341 /* We may need a copy reloc. */
5342 h->non_got_ref = 1;
5343
5344 /* Don't propagate .opd relocs. */
5345 if (NO_OPD_RELOCS && opd_sym_map != NULL)
5346 break;
5347
5348 /* If we are creating a shared library, and this is a reloc
5349 against a global symbol, or a non PC relative reloc
5350 against a local symbol, then we need to copy the reloc
5351 into the shared library. However, if we are linking with
5352 -Bsymbolic, we do not need to copy a reloc against a
5353 global symbol which is defined in an object we are
5354 including in the link (i.e., DEF_REGULAR is set). At
5355 this point we have not seen all the input files, so it is
5356 possible that DEF_REGULAR is not set now but will be set
5357 later (it is never cleared). In case of a weak definition,
5358 DEF_REGULAR may be cleared later by a strong definition in
5359 a shared library. We account for that possibility below by
5360 storing information in the dyn_relocs field of the hash
5361 table entry. A similar situation occurs when creating
5362 shared libraries and symbol visibility changes render the
5363 symbol local.
5364
5365 If on the other hand, we are creating an executable, we
5366 may need to keep relocations for symbols satisfied by a
5367 dynamic library if we manage to avoid copy relocs for the
5368 symbol. */
5369 dodyn:
5370 if ((info->shared
5371 && (must_be_dyn_reloc (info, r_type)
5372 || (h != NULL
5373 && (! info->symbolic
5374 || h->root.type == bfd_link_hash_defweak
5375 || !h->def_regular))))
5376 || (ELIMINATE_COPY_RELOCS
5377 && !info->shared
5378 && h != NULL
5379 && (h->root.type == bfd_link_hash_defweak
5380 || !h->def_regular))
5381 || (!info->shared
5382 && ifunc != NULL))
5383 {
5384 struct ppc_dyn_relocs *p;
5385 struct ppc_dyn_relocs **head;
5386
5387 /* We must copy these reloc types into the output file.
5388 Create a reloc section in dynobj and make room for
5389 this reloc. */
5390 if (sreloc == NULL)
5391 {
5392 sreloc = _bfd_elf_make_dynamic_reloc_section
5393 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
5394
5395 if (sreloc == NULL)
5396 return FALSE;
5397 }
5398
5399 /* If this is a global symbol, we count the number of
5400 relocations we need for this symbol. */
5401 if (h != NULL)
5402 {
5403 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
5404 }
5405 else
5406 {
5407 /* Track dynamic relocs needed for local syms too.
5408 We really need local syms available to do this
5409 easily. Oh well. */
5410 asection *s;
5411 void *vpp;
5412 Elf_Internal_Sym *isym;
5413
5414 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5415 abfd, r_symndx);
5416 if (isym == NULL)
5417 return FALSE;
5418
5419 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5420 if (s == NULL)
5421 s = sec;
5422
5423 vpp = &elf_section_data (s)->local_dynrel;
5424 head = (struct ppc_dyn_relocs **) vpp;
5425 }
5426
5427 p = *head;
5428 if (p == NULL || p->sec != sec)
5429 {
5430 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5431 if (p == NULL)
5432 return FALSE;
5433 p->next = *head;
5434 *head = p;
5435 p->sec = sec;
5436 p->count = 0;
5437 p->pc_count = 0;
5438 }
5439
5440 p->count += 1;
5441 if (!must_be_dyn_reloc (info, r_type))
5442 p->pc_count += 1;
5443 }
5444 break;
5445
5446 default:
5447 break;
5448 }
5449 }
5450
5451 return TRUE;
5452 }
5453
5454 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
5455 of the code entry point, and its section. */
5456
5457 static bfd_vma
5458 opd_entry_value (asection *opd_sec,
5459 bfd_vma offset,
5460 asection **code_sec,
5461 bfd_vma *code_off)
5462 {
5463 bfd *opd_bfd = opd_sec->owner;
5464 Elf_Internal_Rela *relocs;
5465 Elf_Internal_Rela *lo, *hi, *look;
5466 bfd_vma val;
5467
5468 /* No relocs implies we are linking a --just-symbols object. */
5469 if (opd_sec->reloc_count == 0)
5470 {
5471 if (!bfd_get_section_contents (opd_bfd, opd_sec, &val, offset, 8))
5472 return (bfd_vma) -1;
5473
5474 if (code_sec != NULL)
5475 {
5476 asection *sec, *likely = NULL;
5477 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
5478 if (sec->vma <= val
5479 && (sec->flags & SEC_LOAD) != 0
5480 && (sec->flags & SEC_ALLOC) != 0)
5481 likely = sec;
5482 if (likely != NULL)
5483 {
5484 *code_sec = likely;
5485 if (code_off != NULL)
5486 *code_off = val - likely->vma;
5487 }
5488 }
5489 return val;
5490 }
5491
5492 BFD_ASSERT (is_ppc64_elf (opd_bfd));
5493
5494 relocs = ppc64_elf_tdata (opd_bfd)->opd_relocs;
5495 if (relocs == NULL)
5496 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
5497
5498 /* Go find the opd reloc at the sym address. */
5499 lo = relocs;
5500 BFD_ASSERT (lo != NULL);
5501 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
5502 val = (bfd_vma) -1;
5503 while (lo < hi)
5504 {
5505 look = lo + (hi - lo) / 2;
5506 if (look->r_offset < offset)
5507 lo = look + 1;
5508 else if (look->r_offset > offset)
5509 hi = look;
5510 else
5511 {
5512 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (opd_bfd);
5513
5514 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
5515 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
5516 {
5517 unsigned long symndx = ELF64_R_SYM (look->r_info);
5518 asection *sec;
5519
5520 if (symndx < symtab_hdr->sh_info)
5521 {
5522 Elf_Internal_Sym *sym;
5523
5524 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
5525 if (sym == NULL)
5526 {
5527 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
5528 symtab_hdr->sh_info,
5529 0, NULL, NULL, NULL);
5530 if (sym == NULL)
5531 break;
5532 symtab_hdr->contents = (bfd_byte *) sym;
5533 }
5534
5535 sym += symndx;
5536 val = sym->st_value;
5537 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
5538 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
5539 }
5540 else
5541 {
5542 struct elf_link_hash_entry **sym_hashes;
5543 struct elf_link_hash_entry *rh;
5544
5545 sym_hashes = elf_sym_hashes (opd_bfd);
5546 rh = sym_hashes[symndx - symtab_hdr->sh_info];
5547 rh = elf_follow_link (rh);
5548 BFD_ASSERT (rh->root.type == bfd_link_hash_defined
5549 || rh->root.type == bfd_link_hash_defweak);
5550 val = rh->root.u.def.value;
5551 sec = rh->root.u.def.section;
5552 }
5553 val += look->r_addend;
5554 if (code_off != NULL)
5555 *code_off = val;
5556 if (code_sec != NULL)
5557 *code_sec = sec;
5558 if (sec != NULL && sec->output_section != NULL)
5559 val += sec->output_section->vma + sec->output_offset;
5560 }
5561 break;
5562 }
5563 }
5564
5565 return val;
5566 }
5567
5568 /* If FDH is a function descriptor symbol, return the associated code
5569 entry symbol if it is defined. Return NULL otherwise. */
5570
5571 static struct ppc_link_hash_entry *
5572 defined_code_entry (struct ppc_link_hash_entry *fdh)
5573 {
5574 if (fdh->is_func_descriptor)
5575 {
5576 struct ppc_link_hash_entry *fh = ppc_follow_link (fdh->oh);
5577 if (fh->elf.root.type == bfd_link_hash_defined
5578 || fh->elf.root.type == bfd_link_hash_defweak)
5579 return fh;
5580 }
5581 return NULL;
5582 }
5583
5584 /* If FH is a function code entry symbol, return the associated
5585 function descriptor symbol if it is defined. Return NULL otherwise. */
5586
5587 static struct ppc_link_hash_entry *
5588 defined_func_desc (struct ppc_link_hash_entry *fh)
5589 {
5590 if (fh->oh != NULL
5591 && fh->oh->is_func_descriptor)
5592 {
5593 struct ppc_link_hash_entry *fdh = ppc_follow_link (fh->oh);
5594 if (fdh->elf.root.type == bfd_link_hash_defined
5595 || fdh->elf.root.type == bfd_link_hash_defweak)
5596 return fdh;
5597 }
5598 return NULL;
5599 }
5600
5601 /* Mark all our entry sym sections, both opd and code section. */
5602
5603 static void
5604 ppc64_elf_gc_keep (struct bfd_link_info *info)
5605 {
5606 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5607 struct bfd_sym_chain *sym;
5608
5609 if (htab == NULL)
5610 return;
5611
5612 for (sym = info->gc_sym_list; sym != NULL; sym = sym->next)
5613 {
5614 struct ppc_link_hash_entry *eh, *fh;
5615 asection *sec;
5616
5617 eh = (struct ppc_link_hash_entry *)
5618 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, TRUE);
5619 if (eh == NULL)
5620 continue;
5621 if (eh->elf.root.type != bfd_link_hash_defined
5622 && eh->elf.root.type != bfd_link_hash_defweak)
5623 continue;
5624
5625 fh = defined_code_entry (eh);
5626 if (fh != NULL)
5627 {
5628 sec = fh->elf.root.u.def.section;
5629 sec->flags |= SEC_KEEP;
5630 }
5631 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5632 && opd_entry_value (eh->elf.root.u.def.section,
5633 eh->elf.root.u.def.value,
5634 &sec, NULL) != (bfd_vma) -1)
5635 sec->flags |= SEC_KEEP;
5636
5637 sec = eh->elf.root.u.def.section;
5638 sec->flags |= SEC_KEEP;
5639 }
5640 }
5641
5642 /* Mark sections containing dynamically referenced symbols. When
5643 building shared libraries, we must assume that any visible symbol is
5644 referenced. */
5645
5646 static bfd_boolean
5647 ppc64_elf_gc_mark_dynamic_ref (struct elf_link_hash_entry *h, void *inf)
5648 {
5649 struct bfd_link_info *info = (struct bfd_link_info *) inf;
5650 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
5651 struct ppc_link_hash_entry *fdh;
5652
5653 if (eh->elf.root.type == bfd_link_hash_warning)
5654 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
5655
5656 /* Dynamic linking info is on the func descriptor sym. */
5657 fdh = defined_func_desc (eh);
5658 if (fdh != NULL)
5659 eh = fdh;
5660
5661 if ((eh->elf.root.type == bfd_link_hash_defined
5662 || eh->elf.root.type == bfd_link_hash_defweak)
5663 && (eh->elf.ref_dynamic
5664 || (!info->executable
5665 && eh->elf.def_regular
5666 && ELF_ST_VISIBILITY (eh->elf.other) != STV_INTERNAL
5667 && ELF_ST_VISIBILITY (eh->elf.other) != STV_HIDDEN)))
5668 {
5669 asection *code_sec;
5670 struct ppc_link_hash_entry *fh;
5671
5672 eh->elf.root.u.def.section->flags |= SEC_KEEP;
5673
5674 /* Function descriptor syms cause the associated
5675 function code sym section to be marked. */
5676 fh = defined_code_entry (eh);
5677 if (fh != NULL)
5678 {
5679 code_sec = fh->elf.root.u.def.section;
5680 code_sec->flags |= SEC_KEEP;
5681 }
5682 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5683 && opd_entry_value (eh->elf.root.u.def.section,
5684 eh->elf.root.u.def.value,
5685 &code_sec, NULL) != (bfd_vma) -1)
5686 code_sec->flags |= SEC_KEEP;
5687 }
5688
5689 return TRUE;
5690 }
5691
5692 /* Return the section that should be marked against GC for a given
5693 relocation. */
5694
5695 static asection *
5696 ppc64_elf_gc_mark_hook (asection *sec,
5697 struct bfd_link_info *info,
5698 Elf_Internal_Rela *rel,
5699 struct elf_link_hash_entry *h,
5700 Elf_Internal_Sym *sym)
5701 {
5702 asection *rsec;
5703
5704 /* Syms return NULL if we're marking .opd, so we avoid marking all
5705 function sections, as all functions are referenced in .opd. */
5706 rsec = NULL;
5707 if (get_opd_info (sec) != NULL)
5708 return rsec;
5709
5710 if (h != NULL)
5711 {
5712 enum elf_ppc64_reloc_type r_type;
5713 struct ppc_link_hash_entry *eh, *fh, *fdh;
5714
5715 r_type = ELF64_R_TYPE (rel->r_info);
5716 switch (r_type)
5717 {
5718 case R_PPC64_GNU_VTINHERIT:
5719 case R_PPC64_GNU_VTENTRY:
5720 break;
5721
5722 default:
5723 switch (h->root.type)
5724 {
5725 case bfd_link_hash_defined:
5726 case bfd_link_hash_defweak:
5727 eh = (struct ppc_link_hash_entry *) h;
5728 fdh = defined_func_desc (eh);
5729 if (fdh != NULL)
5730 eh = fdh;
5731
5732 /* Function descriptor syms cause the associated
5733 function code sym section to be marked. */
5734 fh = defined_code_entry (eh);
5735 if (fh != NULL)
5736 {
5737 /* They also mark their opd section. */
5738 eh->elf.root.u.def.section->gc_mark = 1;
5739
5740 rsec = fh->elf.root.u.def.section;
5741 }
5742 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5743 && opd_entry_value (eh->elf.root.u.def.section,
5744 eh->elf.root.u.def.value,
5745 &rsec, NULL) != (bfd_vma) -1)
5746 eh->elf.root.u.def.section->gc_mark = 1;
5747 else
5748 rsec = h->root.u.def.section;
5749 break;
5750
5751 case bfd_link_hash_common:
5752 rsec = h->root.u.c.p->section;
5753 break;
5754
5755 default:
5756 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
5757 }
5758 }
5759 }
5760 else
5761 {
5762 struct _opd_sec_data *opd;
5763
5764 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
5765 opd = get_opd_info (rsec);
5766 if (opd != NULL && opd->func_sec != NULL)
5767 {
5768 rsec->gc_mark = 1;
5769
5770 rsec = opd->func_sec[(sym->st_value + rel->r_addend) / 8];
5771 }
5772 }
5773
5774 return rsec;
5775 }
5776
5777 /* Update the .got, .plt. and dynamic reloc reference counts for the
5778 section being removed. */
5779
5780 static bfd_boolean
5781 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
5782 asection *sec, const Elf_Internal_Rela *relocs)
5783 {
5784 struct ppc_link_hash_table *htab;
5785 Elf_Internal_Shdr *symtab_hdr;
5786 struct elf_link_hash_entry **sym_hashes;
5787 struct got_entry **local_got_ents;
5788 const Elf_Internal_Rela *rel, *relend;
5789
5790 if (info->relocatable)
5791 return TRUE;
5792
5793 if ((sec->flags & SEC_ALLOC) == 0)
5794 return TRUE;
5795
5796 elf_section_data (sec)->local_dynrel = NULL;
5797
5798 htab = ppc_hash_table (info);
5799 if (htab == NULL)
5800 return FALSE;
5801
5802 symtab_hdr = &elf_symtab_hdr (abfd);
5803 sym_hashes = elf_sym_hashes (abfd);
5804 local_got_ents = elf_local_got_ents (abfd);
5805
5806 relend = relocs + sec->reloc_count;
5807 for (rel = relocs; rel < relend; rel++)
5808 {
5809 unsigned long r_symndx;
5810 enum elf_ppc64_reloc_type r_type;
5811 struct elf_link_hash_entry *h = NULL;
5812 unsigned char tls_type = 0;
5813
5814 r_symndx = ELF64_R_SYM (rel->r_info);
5815 r_type = ELF64_R_TYPE (rel->r_info);
5816 if (r_symndx >= symtab_hdr->sh_info)
5817 {
5818 struct ppc_link_hash_entry *eh;
5819 struct ppc_dyn_relocs **pp;
5820 struct ppc_dyn_relocs *p;
5821
5822 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5823 h = elf_follow_link (h);
5824 eh = (struct ppc_link_hash_entry *) h;
5825
5826 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
5827 if (p->sec == sec)
5828 {
5829 /* Everything must go for SEC. */
5830 *pp = p->next;
5831 break;
5832 }
5833 }
5834
5835 if (is_branch_reloc (r_type))
5836 {
5837 struct plt_entry **ifunc = NULL;
5838 if (h != NULL)
5839 {
5840 if (h->type == STT_GNU_IFUNC)
5841 ifunc = &h->plt.plist;
5842 }
5843 else if (local_got_ents != NULL)
5844 {
5845 struct plt_entry **local_plt = (struct plt_entry **)
5846 (local_got_ents + symtab_hdr->sh_info);
5847 unsigned char *local_got_tls_masks = (unsigned char *)
5848 (local_plt + symtab_hdr->sh_info);
5849 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
5850 ifunc = local_plt + r_symndx;
5851 }
5852 if (ifunc != NULL)
5853 {
5854 struct plt_entry *ent;
5855
5856 for (ent = *ifunc; ent != NULL; ent = ent->next)
5857 if (ent->addend == rel->r_addend)
5858 break;
5859 if (ent == NULL)
5860 abort ();
5861 if (ent->plt.refcount > 0)
5862 ent->plt.refcount -= 1;
5863 continue;
5864 }
5865 }
5866
5867 switch (r_type)
5868 {
5869 case R_PPC64_GOT_TLSLD16:
5870 case R_PPC64_GOT_TLSLD16_LO:
5871 case R_PPC64_GOT_TLSLD16_HI:
5872 case R_PPC64_GOT_TLSLD16_HA:
5873 tls_type = TLS_TLS | TLS_LD;
5874 goto dogot;
5875
5876 case R_PPC64_GOT_TLSGD16:
5877 case R_PPC64_GOT_TLSGD16_LO:
5878 case R_PPC64_GOT_TLSGD16_HI:
5879 case R_PPC64_GOT_TLSGD16_HA:
5880 tls_type = TLS_TLS | TLS_GD;
5881 goto dogot;
5882
5883 case R_PPC64_GOT_TPREL16_DS:
5884 case R_PPC64_GOT_TPREL16_LO_DS:
5885 case R_PPC64_GOT_TPREL16_HI:
5886 case R_PPC64_GOT_TPREL16_HA:
5887 tls_type = TLS_TLS | TLS_TPREL;
5888 goto dogot;
5889
5890 case R_PPC64_GOT_DTPREL16_DS:
5891 case R_PPC64_GOT_DTPREL16_LO_DS:
5892 case R_PPC64_GOT_DTPREL16_HI:
5893 case R_PPC64_GOT_DTPREL16_HA:
5894 tls_type = TLS_TLS | TLS_DTPREL;
5895 goto dogot;
5896
5897 case R_PPC64_GOT16:
5898 case R_PPC64_GOT16_DS:
5899 case R_PPC64_GOT16_HA:
5900 case R_PPC64_GOT16_HI:
5901 case R_PPC64_GOT16_LO:
5902 case R_PPC64_GOT16_LO_DS:
5903 dogot:
5904 {
5905 struct got_entry *ent;
5906
5907 if (h != NULL)
5908 ent = h->got.glist;
5909 else
5910 ent = local_got_ents[r_symndx];
5911
5912 for (; ent != NULL; ent = ent->next)
5913 if (ent->addend == rel->r_addend
5914 && ent->owner == abfd
5915 && ent->tls_type == tls_type)
5916 break;
5917 if (ent == NULL)
5918 abort ();
5919 if (ent->got.refcount > 0)
5920 ent->got.refcount -= 1;
5921 }
5922 break;
5923
5924 case R_PPC64_PLT16_HA:
5925 case R_PPC64_PLT16_HI:
5926 case R_PPC64_PLT16_LO:
5927 case R_PPC64_PLT32:
5928 case R_PPC64_PLT64:
5929 case R_PPC64_REL14:
5930 case R_PPC64_REL14_BRNTAKEN:
5931 case R_PPC64_REL14_BRTAKEN:
5932 case R_PPC64_REL24:
5933 if (h != NULL)
5934 {
5935 struct plt_entry *ent;
5936
5937 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5938 if (ent->addend == rel->r_addend)
5939 break;
5940 if (ent != NULL && ent->plt.refcount > 0)
5941 ent->plt.refcount -= 1;
5942 }
5943 break;
5944
5945 default:
5946 break;
5947 }
5948 }
5949 return TRUE;
5950 }
5951
5952 /* The maximum size of .sfpr. */
5953 #define SFPR_MAX (218*4)
5954
5955 struct sfpr_def_parms
5956 {
5957 const char name[12];
5958 unsigned char lo, hi;
5959 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
5960 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
5961 };
5962
5963 /* Auto-generate _save*, _rest* functions in .sfpr. */
5964
5965 static bfd_boolean
5966 sfpr_define (struct bfd_link_info *info, const struct sfpr_def_parms *parm)
5967 {
5968 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5969 unsigned int i;
5970 size_t len = strlen (parm->name);
5971 bfd_boolean writing = FALSE;
5972 char sym[16];
5973
5974 if (htab == NULL)
5975 return FALSE;
5976
5977 memcpy (sym, parm->name, len);
5978 sym[len + 2] = 0;
5979
5980 for (i = parm->lo; i <= parm->hi; i++)
5981 {
5982 struct elf_link_hash_entry *h;
5983
5984 sym[len + 0] = i / 10 + '0';
5985 sym[len + 1] = i % 10 + '0';
5986 h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
5987 if (h != NULL
5988 && !h->def_regular)
5989 {
5990 h->root.type = bfd_link_hash_defined;
5991 h->root.u.def.section = htab->sfpr;
5992 h->root.u.def.value = htab->sfpr->size;
5993 h->type = STT_FUNC;
5994 h->def_regular = 1;
5995 _bfd_elf_link_hash_hide_symbol (info, h, TRUE);
5996 writing = TRUE;
5997 if (htab->sfpr->contents == NULL)
5998 {
5999 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
6000 if (htab->sfpr->contents == NULL)
6001 return FALSE;
6002 }
6003 }
6004 if (writing)
6005 {
6006 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
6007 if (i != parm->hi)
6008 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
6009 else
6010 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
6011 htab->sfpr->size = p - htab->sfpr->contents;
6012 }
6013 }
6014
6015 return TRUE;
6016 }
6017
6018 static bfd_byte *
6019 savegpr0 (bfd *abfd, bfd_byte *p, int r)
6020 {
6021 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6022 return p + 4;
6023 }
6024
6025 static bfd_byte *
6026 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
6027 {
6028 p = savegpr0 (abfd, p, r);
6029 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
6030 p = p + 4;
6031 bfd_put_32 (abfd, BLR, p);
6032 return p + 4;
6033 }
6034
6035 static bfd_byte *
6036 restgpr0 (bfd *abfd, bfd_byte *p, int r)
6037 {
6038 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6039 return p + 4;
6040 }
6041
6042 static bfd_byte *
6043 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
6044 {
6045 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
6046 p = p + 4;
6047 p = restgpr0 (abfd, p, r);
6048 bfd_put_32 (abfd, MTLR_R0, p);
6049 p = p + 4;
6050 if (r == 29)
6051 {
6052 p = restgpr0 (abfd, p, 30);
6053 p = restgpr0 (abfd, p, 31);
6054 }
6055 bfd_put_32 (abfd, BLR, p);
6056 return p + 4;
6057 }
6058
6059 static bfd_byte *
6060 savegpr1 (bfd *abfd, bfd_byte *p, int r)
6061 {
6062 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6063 return p + 4;
6064 }
6065
6066 static bfd_byte *
6067 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
6068 {
6069 p = savegpr1 (abfd, p, r);
6070 bfd_put_32 (abfd, BLR, p);
6071 return p + 4;
6072 }
6073
6074 static bfd_byte *
6075 restgpr1 (bfd *abfd, bfd_byte *p, int r)
6076 {
6077 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6078 return p + 4;
6079 }
6080
6081 static bfd_byte *
6082 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
6083 {
6084 p = restgpr1 (abfd, p, r);
6085 bfd_put_32 (abfd, BLR, p);
6086 return p + 4;
6087 }
6088
6089 static bfd_byte *
6090 savefpr (bfd *abfd, bfd_byte *p, int r)
6091 {
6092 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6093 return p + 4;
6094 }
6095
6096 static bfd_byte *
6097 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
6098 {
6099 p = savefpr (abfd, p, r);
6100 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
6101 p = p + 4;
6102 bfd_put_32 (abfd, BLR, p);
6103 return p + 4;
6104 }
6105
6106 static bfd_byte *
6107 restfpr (bfd *abfd, bfd_byte *p, int r)
6108 {
6109 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6110 return p + 4;
6111 }
6112
6113 static bfd_byte *
6114 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
6115 {
6116 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
6117 p = p + 4;
6118 p = restfpr (abfd, p, r);
6119 bfd_put_32 (abfd, MTLR_R0, p);
6120 p = p + 4;
6121 if (r == 29)
6122 {
6123 p = restfpr (abfd, p, 30);
6124 p = restfpr (abfd, p, 31);
6125 }
6126 bfd_put_32 (abfd, BLR, p);
6127 return p + 4;
6128 }
6129
6130 static bfd_byte *
6131 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
6132 {
6133 p = savefpr (abfd, p, r);
6134 bfd_put_32 (abfd, BLR, p);
6135 return p + 4;
6136 }
6137
6138 static bfd_byte *
6139 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
6140 {
6141 p = restfpr (abfd, p, r);
6142 bfd_put_32 (abfd, BLR, p);
6143 return p + 4;
6144 }
6145
6146 static bfd_byte *
6147 savevr (bfd *abfd, bfd_byte *p, int r)
6148 {
6149 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6150 p = p + 4;
6151 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
6152 return p + 4;
6153 }
6154
6155 static bfd_byte *
6156 savevr_tail (bfd *abfd, bfd_byte *p, int r)
6157 {
6158 p = savevr (abfd, p, r);
6159 bfd_put_32 (abfd, BLR, p);
6160 return p + 4;
6161 }
6162
6163 static bfd_byte *
6164 restvr (bfd *abfd, bfd_byte *p, int r)
6165 {
6166 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6167 p = p + 4;
6168 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
6169 return p + 4;
6170 }
6171
6172 static bfd_byte *
6173 restvr_tail (bfd *abfd, bfd_byte *p, int r)
6174 {
6175 p = restvr (abfd, p, r);
6176 bfd_put_32 (abfd, BLR, p);
6177 return p + 4;
6178 }
6179
6180 /* Called via elf_link_hash_traverse to transfer dynamic linking
6181 information on function code symbol entries to their corresponding
6182 function descriptor symbol entries. */
6183
6184 static bfd_boolean
6185 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
6186 {
6187 struct bfd_link_info *info;
6188 struct ppc_link_hash_table *htab;
6189 struct plt_entry *ent;
6190 struct ppc_link_hash_entry *fh;
6191 struct ppc_link_hash_entry *fdh;
6192 bfd_boolean force_local;
6193
6194 fh = (struct ppc_link_hash_entry *) h;
6195 if (fh->elf.root.type == bfd_link_hash_indirect)
6196 return TRUE;
6197
6198 if (fh->elf.root.type == bfd_link_hash_warning)
6199 fh = (struct ppc_link_hash_entry *) fh->elf.root.u.i.link;
6200
6201 info = inf;
6202 htab = ppc_hash_table (info);
6203 if (htab == NULL)
6204 return FALSE;
6205
6206 /* Resolve undefined references to dot-symbols as the value
6207 in the function descriptor, if we have one in a regular object.
6208 This is to satisfy cases like ".quad .foo". Calls to functions
6209 in dynamic objects are handled elsewhere. */
6210 if (fh->elf.root.type == bfd_link_hash_undefweak
6211 && fh->was_undefined
6212 && (fdh = defined_func_desc (fh)) != NULL
6213 && get_opd_info (fdh->elf.root.u.def.section) != NULL
6214 && opd_entry_value (fdh->elf.root.u.def.section,
6215 fdh->elf.root.u.def.value,
6216 &fh->elf.root.u.def.section,
6217 &fh->elf.root.u.def.value) != (bfd_vma) -1)
6218 {
6219 fh->elf.root.type = fdh->elf.root.type;
6220 fh->elf.forced_local = 1;
6221 fh->elf.def_regular = fdh->elf.def_regular;
6222 fh->elf.def_dynamic = fdh->elf.def_dynamic;
6223 }
6224
6225 /* If this is a function code symbol, transfer dynamic linking
6226 information to the function descriptor symbol. */
6227 if (!fh->is_func)
6228 return TRUE;
6229
6230 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
6231 if (ent->plt.refcount > 0)
6232 break;
6233 if (ent == NULL
6234 || fh->elf.root.root.string[0] != '.'
6235 || fh->elf.root.root.string[1] == '\0')
6236 return TRUE;
6237
6238 /* Find the corresponding function descriptor symbol. Create it
6239 as undefined if necessary. */
6240
6241 fdh = lookup_fdh (fh, htab);
6242 if (fdh == NULL
6243 && !info->executable
6244 && (fh->elf.root.type == bfd_link_hash_undefined
6245 || fh->elf.root.type == bfd_link_hash_undefweak))
6246 {
6247 fdh = make_fdh (info, fh);
6248 if (fdh == NULL)
6249 return FALSE;
6250 }
6251
6252 /* Fake function descriptors are made undefweak. If the function
6253 code symbol is strong undefined, make the fake sym the same.
6254 If the function code symbol is defined, then force the fake
6255 descriptor local; We can't support overriding of symbols in a
6256 shared library on a fake descriptor. */
6257
6258 if (fdh != NULL
6259 && fdh->fake
6260 && fdh->elf.root.type == bfd_link_hash_undefweak)
6261 {
6262 if (fh->elf.root.type == bfd_link_hash_undefined)
6263 {
6264 fdh->elf.root.type = bfd_link_hash_undefined;
6265 bfd_link_add_undef (&htab->elf.root, &fdh->elf.root);
6266 }
6267 else if (fh->elf.root.type == bfd_link_hash_defined
6268 || fh->elf.root.type == bfd_link_hash_defweak)
6269 {
6270 _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE);
6271 }
6272 }
6273
6274 if (fdh != NULL
6275 && !fdh->elf.forced_local
6276 && (!info->executable
6277 || fdh->elf.def_dynamic
6278 || fdh->elf.ref_dynamic
6279 || (fdh->elf.root.type == bfd_link_hash_undefweak
6280 && ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT)))
6281 {
6282 if (fdh->elf.dynindx == -1)
6283 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
6284 return FALSE;
6285 fdh->elf.ref_regular |= fh->elf.ref_regular;
6286 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
6287 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
6288 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
6289 if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT)
6290 {
6291 move_plt_plist (fh, fdh);
6292 fdh->elf.needs_plt = 1;
6293 }
6294 fdh->is_func_descriptor = 1;
6295 fdh->oh = fh;
6296 fh->oh = fdh;
6297 }
6298
6299 /* Now that the info is on the function descriptor, clear the
6300 function code sym info. Any function code syms for which we
6301 don't have a definition in a regular file, we force local.
6302 This prevents a shared library from exporting syms that have
6303 been imported from another library. Function code syms that
6304 are really in the library we must leave global to prevent the
6305 linker dragging in a definition from a static library. */
6306 force_local = (!fh->elf.def_regular
6307 || fdh == NULL
6308 || !fdh->elf.def_regular
6309 || fdh->elf.forced_local);
6310 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
6311
6312 return TRUE;
6313 }
6314
6315 /* Called near the start of bfd_elf_size_dynamic_sections. We use
6316 this hook to a) provide some gcc support functions, and b) transfer
6317 dynamic linking information gathered so far on function code symbol
6318 entries, to their corresponding function descriptor symbol entries. */
6319
6320 static bfd_boolean
6321 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
6322 struct bfd_link_info *info)
6323 {
6324 struct ppc_link_hash_table *htab;
6325 unsigned int i;
6326 const struct sfpr_def_parms funcs[] =
6327 {
6328 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
6329 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
6330 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
6331 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
6332 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
6333 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
6334 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
6335 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
6336 { "._savef", 14, 31, savefpr, savefpr1_tail },
6337 { "._restf", 14, 31, restfpr, restfpr1_tail },
6338 { "_savevr_", 20, 31, savevr, savevr_tail },
6339 { "_restvr_", 20, 31, restvr, restvr_tail }
6340 };
6341
6342 htab = ppc_hash_table (info);
6343 if (htab == NULL)
6344 return FALSE;
6345
6346 if (htab->sfpr == NULL)
6347 /* We don't have any relocs. */
6348 return TRUE;
6349
6350 /* Provide any missing _save* and _rest* functions. */
6351 htab->sfpr->size = 0;
6352 for (i = 0; i < sizeof (funcs) / sizeof (funcs[0]); i++)
6353 if (!sfpr_define (info, &funcs[i]))
6354 return FALSE;
6355
6356 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
6357
6358 if (htab->sfpr->size == 0)
6359 htab->sfpr->flags |= SEC_EXCLUDE;
6360
6361 return TRUE;
6362 }
6363
6364 /* Adjust a symbol defined by a dynamic object and referenced by a
6365 regular object. The current definition is in some section of the
6366 dynamic object, but we're not including those sections. We have to
6367 change the definition to something the rest of the link can
6368 understand. */
6369
6370 static bfd_boolean
6371 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
6372 struct elf_link_hash_entry *h)
6373 {
6374 struct ppc_link_hash_table *htab;
6375 asection *s;
6376
6377 htab = ppc_hash_table (info);
6378 if (htab == NULL)
6379 return FALSE;
6380
6381 /* Deal with function syms. */
6382 if (h->type == STT_FUNC
6383 || h->type == STT_GNU_IFUNC
6384 || h->needs_plt)
6385 {
6386 /* Clear procedure linkage table information for any symbol that
6387 won't need a .plt entry. */
6388 struct plt_entry *ent;
6389 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6390 if (ent->plt.refcount > 0)
6391 break;
6392 if (ent == NULL
6393 || (h->type != STT_GNU_IFUNC
6394 && (SYMBOL_CALLS_LOCAL (info, h)
6395 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
6396 && h->root.type == bfd_link_hash_undefweak))))
6397 {
6398 h->plt.plist = NULL;
6399 h->needs_plt = 0;
6400 }
6401 }
6402 else
6403 h->plt.plist = NULL;
6404
6405 /* If this is a weak symbol, and there is a real definition, the
6406 processor independent code will have arranged for us to see the
6407 real definition first, and we can just use the same value. */
6408 if (h->u.weakdef != NULL)
6409 {
6410 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
6411 || h->u.weakdef->root.type == bfd_link_hash_defweak);
6412 h->root.u.def.section = h->u.weakdef->root.u.def.section;
6413 h->root.u.def.value = h->u.weakdef->root.u.def.value;
6414 if (ELIMINATE_COPY_RELOCS)
6415 h->non_got_ref = h->u.weakdef->non_got_ref;
6416 return TRUE;
6417 }
6418
6419 /* If we are creating a shared library, we must presume that the
6420 only references to the symbol are via the global offset table.
6421 For such cases we need not do anything here; the relocations will
6422 be handled correctly by relocate_section. */
6423 if (info->shared)
6424 return TRUE;
6425
6426 /* If there are no references to this symbol that do not use the
6427 GOT, we don't need to generate a copy reloc. */
6428 if (!h->non_got_ref)
6429 return TRUE;
6430
6431 /* Don't generate a copy reloc for symbols defined in the executable. */
6432 if (!h->def_dynamic || !h->ref_regular || h->def_regular)
6433 return TRUE;
6434
6435 if (ELIMINATE_COPY_RELOCS)
6436 {
6437 struct ppc_link_hash_entry * eh;
6438 struct ppc_dyn_relocs *p;
6439
6440 eh = (struct ppc_link_hash_entry *) h;
6441 for (p = eh->dyn_relocs; p != NULL; p = p->next)
6442 {
6443 s = p->sec->output_section;
6444 if (s != NULL && (s->flags & SEC_READONLY) != 0)
6445 break;
6446 }
6447
6448 /* If we didn't find any dynamic relocs in read-only sections, then
6449 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
6450 if (p == NULL)
6451 {
6452 h->non_got_ref = 0;
6453 return TRUE;
6454 }
6455 }
6456
6457 if (h->plt.plist != NULL)
6458 {
6459 /* We should never get here, but unfortunately there are versions
6460 of gcc out there that improperly (for this ABI) put initialized
6461 function pointers, vtable refs and suchlike in read-only
6462 sections. Allow them to proceed, but warn that this might
6463 break at runtime. */
6464 (*_bfd_error_handler)
6465 (_("copy reloc against `%s' requires lazy plt linking; "
6466 "avoid setting LD_BIND_NOW=1 or upgrade gcc"),
6467 h->root.root.string);
6468 }
6469
6470 /* This is a reference to a symbol defined by a dynamic object which
6471 is not a function. */
6472
6473 if (h->size == 0)
6474 {
6475 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
6476 h->root.root.string);
6477 return TRUE;
6478 }
6479
6480 /* We must allocate the symbol in our .dynbss section, which will
6481 become part of the .bss section of the executable. There will be
6482 an entry for this symbol in the .dynsym section. The dynamic
6483 object will contain position independent code, so all references
6484 from the dynamic object to this symbol will go through the global
6485 offset table. The dynamic linker will use the .dynsym entry to
6486 determine the address it must put in the global offset table, so
6487 both the dynamic object and the regular object will refer to the
6488 same memory location for the variable. */
6489
6490 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
6491 to copy the initial value out of the dynamic object and into the
6492 runtime process image. We need to remember the offset into the
6493 .rela.bss section we are going to use. */
6494 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
6495 {
6496 htab->relbss->size += sizeof (Elf64_External_Rela);
6497 h->needs_copy = 1;
6498 }
6499
6500 s = htab->dynbss;
6501
6502 return _bfd_elf_adjust_dynamic_copy (h, s);
6503 }
6504
6505 /* If given a function descriptor symbol, hide both the function code
6506 sym and the descriptor. */
6507 static void
6508 ppc64_elf_hide_symbol (struct bfd_link_info *info,
6509 struct elf_link_hash_entry *h,
6510 bfd_boolean force_local)
6511 {
6512 struct ppc_link_hash_entry *eh;
6513 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
6514
6515 eh = (struct ppc_link_hash_entry *) h;
6516 if (eh->is_func_descriptor)
6517 {
6518 struct ppc_link_hash_entry *fh = eh->oh;
6519
6520 if (fh == NULL)
6521 {
6522 const char *p, *q;
6523 struct ppc_link_hash_table *htab;
6524 char save;
6525
6526 /* We aren't supposed to use alloca in BFD because on
6527 systems which do not have alloca the version in libiberty
6528 calls xmalloc, which might cause the program to crash
6529 when it runs out of memory. This function doesn't have a
6530 return status, so there's no way to gracefully return an
6531 error. So cheat. We know that string[-1] can be safely
6532 accessed; It's either a string in an ELF string table,
6533 or allocated in an objalloc structure. */
6534
6535 p = eh->elf.root.root.string - 1;
6536 save = *p;
6537 *(char *) p = '.';
6538 htab = ppc_hash_table (info);
6539 if (htab == NULL)
6540 return;
6541
6542 fh = (struct ppc_link_hash_entry *)
6543 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
6544 *(char *) p = save;
6545
6546 /* Unfortunately, if it so happens that the string we were
6547 looking for was allocated immediately before this string,
6548 then we overwrote the string terminator. That's the only
6549 reason the lookup should fail. */
6550 if (fh == NULL)
6551 {
6552 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
6553 while (q >= eh->elf.root.root.string && *q == *p)
6554 --q, --p;
6555 if (q < eh->elf.root.root.string && *p == '.')
6556 fh = (struct ppc_link_hash_entry *)
6557 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
6558 }
6559 if (fh != NULL)
6560 {
6561 eh->oh = fh;
6562 fh->oh = eh;
6563 }
6564 }
6565 if (fh != NULL)
6566 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
6567 }
6568 }
6569
6570 static bfd_boolean
6571 get_sym_h (struct elf_link_hash_entry **hp,
6572 Elf_Internal_Sym **symp,
6573 asection **symsecp,
6574 unsigned char **tls_maskp,
6575 Elf_Internal_Sym **locsymsp,
6576 unsigned long r_symndx,
6577 bfd *ibfd)
6578 {
6579 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
6580
6581 if (r_symndx >= symtab_hdr->sh_info)
6582 {
6583 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
6584 struct elf_link_hash_entry *h;
6585
6586 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
6587 h = elf_follow_link (h);
6588
6589 if (hp != NULL)
6590 *hp = h;
6591
6592 if (symp != NULL)
6593 *symp = NULL;
6594
6595 if (symsecp != NULL)
6596 {
6597 asection *symsec = NULL;
6598 if (h->root.type == bfd_link_hash_defined
6599 || h->root.type == bfd_link_hash_defweak)
6600 symsec = h->root.u.def.section;
6601 *symsecp = symsec;
6602 }
6603
6604 if (tls_maskp != NULL)
6605 {
6606 struct ppc_link_hash_entry *eh;
6607
6608 eh = (struct ppc_link_hash_entry *) h;
6609 *tls_maskp = &eh->tls_mask;
6610 }
6611 }
6612 else
6613 {
6614 Elf_Internal_Sym *sym;
6615 Elf_Internal_Sym *locsyms = *locsymsp;
6616
6617 if (locsyms == NULL)
6618 {
6619 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
6620 if (locsyms == NULL)
6621 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
6622 symtab_hdr->sh_info,
6623 0, NULL, NULL, NULL);
6624 if (locsyms == NULL)
6625 return FALSE;
6626 *locsymsp = locsyms;
6627 }
6628 sym = locsyms + r_symndx;
6629
6630 if (hp != NULL)
6631 *hp = NULL;
6632
6633 if (symp != NULL)
6634 *symp = sym;
6635
6636 if (symsecp != NULL)
6637 *symsecp = bfd_section_from_elf_index (ibfd, sym->st_shndx);
6638
6639 if (tls_maskp != NULL)
6640 {
6641 struct got_entry **lgot_ents;
6642 unsigned char *tls_mask;
6643
6644 tls_mask = NULL;
6645 lgot_ents = elf_local_got_ents (ibfd);
6646 if (lgot_ents != NULL)
6647 {
6648 struct plt_entry **local_plt = (struct plt_entry **)
6649 (lgot_ents + symtab_hdr->sh_info);
6650 unsigned char *lgot_masks = (unsigned char *)
6651 (local_plt + symtab_hdr->sh_info);
6652 tls_mask = &lgot_masks[r_symndx];
6653 }
6654 *tls_maskp = tls_mask;
6655 }
6656 }
6657 return TRUE;
6658 }
6659
6660 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
6661 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
6662 type suitable for optimization, and 1 otherwise. */
6663
6664 static int
6665 get_tls_mask (unsigned char **tls_maskp,
6666 unsigned long *toc_symndx,
6667 bfd_vma *toc_addend,
6668 Elf_Internal_Sym **locsymsp,
6669 const Elf_Internal_Rela *rel,
6670 bfd *ibfd)
6671 {
6672 unsigned long r_symndx;
6673 int next_r;
6674 struct elf_link_hash_entry *h;
6675 Elf_Internal_Sym *sym;
6676 asection *sec;
6677 bfd_vma off;
6678
6679 r_symndx = ELF64_R_SYM (rel->r_info);
6680 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
6681 return 0;
6682
6683 if ((*tls_maskp != NULL && **tls_maskp != 0)
6684 || sec == NULL
6685 || ppc64_elf_section_data (sec)->sec_type != sec_toc)
6686 return 1;
6687
6688 /* Look inside a TOC section too. */
6689 if (h != NULL)
6690 {
6691 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
6692 off = h->root.u.def.value;
6693 }
6694 else
6695 off = sym->st_value;
6696 off += rel->r_addend;
6697 BFD_ASSERT (off % 8 == 0);
6698 r_symndx = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8];
6699 next_r = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8 + 1];
6700 if (toc_symndx != NULL)
6701 *toc_symndx = r_symndx;
6702 if (toc_addend != NULL)
6703 *toc_addend = ppc64_elf_section_data (sec)->u.toc.add[off / 8];
6704 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
6705 return 0;
6706 if ((h == NULL
6707 || ((h->root.type == bfd_link_hash_defined
6708 || h->root.type == bfd_link_hash_defweak)
6709 && !h->def_dynamic))
6710 && (next_r == -1 || next_r == -2))
6711 return 1 - next_r;
6712 return 1;
6713 }
6714
6715 /* Adjust all global syms defined in opd sections. In gcc generated
6716 code for the old ABI, these will already have been done. */
6717
6718 static bfd_boolean
6719 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
6720 {
6721 struct ppc_link_hash_entry *eh;
6722 asection *sym_sec;
6723 struct _opd_sec_data *opd;
6724
6725 if (h->root.type == bfd_link_hash_indirect)
6726 return TRUE;
6727
6728 if (h->root.type == bfd_link_hash_warning)
6729 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6730
6731 if (h->root.type != bfd_link_hash_defined
6732 && h->root.type != bfd_link_hash_defweak)
6733 return TRUE;
6734
6735 eh = (struct ppc_link_hash_entry *) h;
6736 if (eh->adjust_done)
6737 return TRUE;
6738
6739 sym_sec = eh->elf.root.u.def.section;
6740 opd = get_opd_info (sym_sec);
6741 if (opd != NULL && opd->adjust != NULL)
6742 {
6743 long adjust = opd->adjust[eh->elf.root.u.def.value / 8];
6744 if (adjust == -1)
6745 {
6746 /* This entry has been deleted. */
6747 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
6748 if (dsec == NULL)
6749 {
6750 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
6751 if (elf_discarded_section (dsec))
6752 {
6753 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
6754 break;
6755 }
6756 }
6757 eh->elf.root.u.def.value = 0;
6758 eh->elf.root.u.def.section = dsec;
6759 }
6760 else
6761 eh->elf.root.u.def.value += adjust;
6762 eh->adjust_done = 1;
6763 }
6764 return TRUE;
6765 }
6766
6767 /* Handles decrementing dynamic reloc counts for the reloc specified by
6768 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM_SEC
6769 have already been determined. */
6770
6771 static bfd_boolean
6772 dec_dynrel_count (bfd_vma r_info,
6773 asection *sec,
6774 struct bfd_link_info *info,
6775 Elf_Internal_Sym **local_syms,
6776 struct elf_link_hash_entry *h,
6777 asection *sym_sec)
6778 {
6779 enum elf_ppc64_reloc_type r_type;
6780 struct ppc_dyn_relocs *p;
6781 struct ppc_dyn_relocs **pp;
6782
6783 /* Can this reloc be dynamic? This switch, and later tests here
6784 should be kept in sync with the code in check_relocs. */
6785 r_type = ELF64_R_TYPE (r_info);
6786 switch (r_type)
6787 {
6788 default:
6789 return TRUE;
6790
6791 case R_PPC64_TPREL16:
6792 case R_PPC64_TPREL16_LO:
6793 case R_PPC64_TPREL16_HI:
6794 case R_PPC64_TPREL16_HA:
6795 case R_PPC64_TPREL16_DS:
6796 case R_PPC64_TPREL16_LO_DS:
6797 case R_PPC64_TPREL16_HIGHER:
6798 case R_PPC64_TPREL16_HIGHERA:
6799 case R_PPC64_TPREL16_HIGHEST:
6800 case R_PPC64_TPREL16_HIGHESTA:
6801 if (!info->shared)
6802 return TRUE;
6803
6804 case R_PPC64_TPREL64:
6805 case R_PPC64_DTPMOD64:
6806 case R_PPC64_DTPREL64:
6807 case R_PPC64_ADDR64:
6808 case R_PPC64_REL30:
6809 case R_PPC64_REL32:
6810 case R_PPC64_REL64:
6811 case R_PPC64_ADDR14:
6812 case R_PPC64_ADDR14_BRNTAKEN:
6813 case R_PPC64_ADDR14_BRTAKEN:
6814 case R_PPC64_ADDR16:
6815 case R_PPC64_ADDR16_DS:
6816 case R_PPC64_ADDR16_HA:
6817 case R_PPC64_ADDR16_HI:
6818 case R_PPC64_ADDR16_HIGHER:
6819 case R_PPC64_ADDR16_HIGHERA:
6820 case R_PPC64_ADDR16_HIGHEST:
6821 case R_PPC64_ADDR16_HIGHESTA:
6822 case R_PPC64_ADDR16_LO:
6823 case R_PPC64_ADDR16_LO_DS:
6824 case R_PPC64_ADDR24:
6825 case R_PPC64_ADDR32:
6826 case R_PPC64_UADDR16:
6827 case R_PPC64_UADDR32:
6828 case R_PPC64_UADDR64:
6829 case R_PPC64_TOC:
6830 break;
6831 }
6832
6833 if (local_syms != NULL)
6834 {
6835 unsigned long r_symndx;
6836 Elf_Internal_Sym *sym;
6837 bfd *ibfd = sec->owner;
6838
6839 r_symndx = ELF64_R_SYM (r_info);
6840 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
6841 return FALSE;
6842 }
6843
6844 if ((info->shared
6845 && (must_be_dyn_reloc (info, r_type)
6846 || (h != NULL
6847 && (!info->symbolic
6848 || h->root.type == bfd_link_hash_defweak
6849 || !h->def_regular))))
6850 || (ELIMINATE_COPY_RELOCS
6851 && !info->shared
6852 && h != NULL
6853 && (h->root.type == bfd_link_hash_defweak
6854 || !h->def_regular)))
6855 ;
6856 else
6857 return TRUE;
6858
6859 if (h != NULL)
6860 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
6861 else
6862 {
6863 if (sym_sec != NULL)
6864 {
6865 void *vpp = &elf_section_data (sym_sec)->local_dynrel;
6866 pp = (struct ppc_dyn_relocs **) vpp;
6867 }
6868 else
6869 {
6870 void *vpp = &elf_section_data (sec)->local_dynrel;
6871 pp = (struct ppc_dyn_relocs **) vpp;
6872 }
6873
6874 /* elf_gc_sweep may have already removed all dyn relocs associated
6875 with local syms for a given section. Don't report a dynreloc
6876 miscount. */
6877 if (*pp == NULL)
6878 return TRUE;
6879 }
6880
6881 while ((p = *pp) != NULL)
6882 {
6883 if (p->sec == sec)
6884 {
6885 if (!must_be_dyn_reloc (info, r_type))
6886 p->pc_count -= 1;
6887 p->count -= 1;
6888 if (p->count == 0)
6889 *pp = p->next;
6890 return TRUE;
6891 }
6892 pp = &p->next;
6893 }
6894
6895 (*_bfd_error_handler) (_("dynreloc miscount for %B, section %A"),
6896 sec->owner, sec);
6897 bfd_set_error (bfd_error_bad_value);
6898 return FALSE;
6899 }
6900
6901 /* Remove unused Official Procedure Descriptor entries. Currently we
6902 only remove those associated with functions in discarded link-once
6903 sections, or weakly defined functions that have been overridden. It
6904 would be possible to remove many more entries for statically linked
6905 applications. */
6906
6907 bfd_boolean
6908 ppc64_elf_edit_opd (struct bfd_link_info *info, bfd_boolean non_overlapping)
6909 {
6910 bfd *ibfd;
6911 bfd_boolean some_edited = FALSE;
6912 asection *need_pad = NULL;
6913
6914 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6915 {
6916 asection *sec;
6917 Elf_Internal_Rela *relstart, *rel, *relend;
6918 Elf_Internal_Shdr *symtab_hdr;
6919 Elf_Internal_Sym *local_syms;
6920 struct elf_link_hash_entry **sym_hashes;
6921 bfd_vma offset;
6922 struct _opd_sec_data *opd;
6923 bfd_boolean need_edit, add_aux_fields;
6924 bfd_size_type cnt_16b = 0;
6925
6926 sec = bfd_get_section_by_name (ibfd, ".opd");
6927 if (sec == NULL || sec->size == 0)
6928 continue;
6929
6930 if (sec->sec_info_type == ELF_INFO_TYPE_JUST_SYMS)
6931 continue;
6932
6933 if (sec->output_section == bfd_abs_section_ptr)
6934 continue;
6935
6936 /* Look through the section relocs. */
6937 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
6938 continue;
6939
6940 local_syms = NULL;
6941 symtab_hdr = &elf_symtab_hdr (ibfd);
6942 sym_hashes = elf_sym_hashes (ibfd);
6943
6944 /* Read the relocations. */
6945 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
6946 info->keep_memory);
6947 if (relstart == NULL)
6948 return FALSE;
6949
6950 /* First run through the relocs to check they are sane, and to
6951 determine whether we need to edit this opd section. */
6952 need_edit = FALSE;
6953 need_pad = sec;
6954 offset = 0;
6955 relend = relstart + sec->reloc_count;
6956 for (rel = relstart; rel < relend; )
6957 {
6958 enum elf_ppc64_reloc_type r_type;
6959 unsigned long r_symndx;
6960 asection *sym_sec;
6961 struct elf_link_hash_entry *h;
6962 Elf_Internal_Sym *sym;
6963
6964 /* .opd contains a regular array of 16 or 24 byte entries. We're
6965 only interested in the reloc pointing to a function entry
6966 point. */
6967 if (rel->r_offset != offset
6968 || rel + 1 >= relend
6969 || (rel + 1)->r_offset != offset + 8)
6970 {
6971 /* If someone messes with .opd alignment then after a
6972 "ld -r" we might have padding in the middle of .opd.
6973 Also, there's nothing to prevent someone putting
6974 something silly in .opd with the assembler. No .opd
6975 optimization for them! */
6976 broken_opd:
6977 (*_bfd_error_handler)
6978 (_("%B: .opd is not a regular array of opd entries"), ibfd);
6979 need_edit = FALSE;
6980 break;
6981 }
6982
6983 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
6984 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
6985 {
6986 (*_bfd_error_handler)
6987 (_("%B: unexpected reloc type %u in .opd section"),
6988 ibfd, r_type);
6989 need_edit = FALSE;
6990 break;
6991 }
6992
6993 r_symndx = ELF64_R_SYM (rel->r_info);
6994 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6995 r_symndx, ibfd))
6996 goto error_ret;
6997
6998 if (sym_sec == NULL || sym_sec->owner == NULL)
6999 {
7000 const char *sym_name;
7001 if (h != NULL)
7002 sym_name = h->root.root.string;
7003 else
7004 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
7005 sym_sec);
7006
7007 (*_bfd_error_handler)
7008 (_("%B: undefined sym `%s' in .opd section"),
7009 ibfd, sym_name);
7010 need_edit = FALSE;
7011 break;
7012 }
7013
7014 /* opd entries are always for functions defined in the
7015 current input bfd. If the symbol isn't defined in the
7016 input bfd, then we won't be using the function in this
7017 bfd; It must be defined in a linkonce section in another
7018 bfd, or is weak. It's also possible that we are
7019 discarding the function due to a linker script /DISCARD/,
7020 which we test for via the output_section. */
7021 if (sym_sec->owner != ibfd
7022 || sym_sec->output_section == bfd_abs_section_ptr)
7023 need_edit = TRUE;
7024
7025 rel += 2;
7026 if (rel == relend
7027 || (rel + 1 == relend && rel->r_offset == offset + 16))
7028 {
7029 if (sec->size == offset + 24)
7030 {
7031 need_pad = NULL;
7032 break;
7033 }
7034 if (rel == relend && sec->size == offset + 16)
7035 {
7036 cnt_16b++;
7037 break;
7038 }
7039 goto broken_opd;
7040 }
7041
7042 if (rel->r_offset == offset + 24)
7043 offset += 24;
7044 else if (rel->r_offset != offset + 16)
7045 goto broken_opd;
7046 else if (rel + 1 < relend
7047 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
7048 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
7049 {
7050 offset += 16;
7051 cnt_16b++;
7052 }
7053 else if (rel + 2 < relend
7054 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_ADDR64
7055 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC)
7056 {
7057 offset += 24;
7058 rel += 1;
7059 }
7060 else
7061 goto broken_opd;
7062 }
7063
7064 add_aux_fields = non_overlapping && cnt_16b > 0;
7065
7066 if (need_edit || add_aux_fields)
7067 {
7068 Elf_Internal_Rela *write_rel;
7069 bfd_byte *rptr, *wptr;
7070 bfd_byte *new_contents;
7071 bfd_boolean skip;
7072 long opd_ent_size;
7073 bfd_size_type amt;
7074
7075 new_contents = NULL;
7076 amt = sec->size * sizeof (long) / 8;
7077 opd = &ppc64_elf_section_data (sec)->u.opd;
7078 opd->adjust = bfd_zalloc (sec->owner, amt);
7079 if (opd->adjust == NULL)
7080 return FALSE;
7081 ppc64_elf_section_data (sec)->sec_type = sec_opd;
7082
7083 /* This seems a waste of time as input .opd sections are all
7084 zeros as generated by gcc, but I suppose there's no reason
7085 this will always be so. We might start putting something in
7086 the third word of .opd entries. */
7087 if ((sec->flags & SEC_IN_MEMORY) == 0)
7088 {
7089 bfd_byte *loc;
7090 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
7091 {
7092 if (loc != NULL)
7093 free (loc);
7094 error_ret:
7095 if (local_syms != NULL
7096 && symtab_hdr->contents != (unsigned char *) local_syms)
7097 free (local_syms);
7098 if (elf_section_data (sec)->relocs != relstart)
7099 free (relstart);
7100 return FALSE;
7101 }
7102 sec->contents = loc;
7103 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
7104 }
7105
7106 elf_section_data (sec)->relocs = relstart;
7107
7108 new_contents = sec->contents;
7109 if (add_aux_fields)
7110 {
7111 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
7112 if (new_contents == NULL)
7113 return FALSE;
7114 need_pad = FALSE;
7115 }
7116 wptr = new_contents;
7117 rptr = sec->contents;
7118
7119 write_rel = relstart;
7120 skip = FALSE;
7121 offset = 0;
7122 opd_ent_size = 0;
7123 for (rel = relstart; rel < relend; rel++)
7124 {
7125 unsigned long r_symndx;
7126 asection *sym_sec;
7127 struct elf_link_hash_entry *h;
7128 Elf_Internal_Sym *sym;
7129
7130 r_symndx = ELF64_R_SYM (rel->r_info);
7131 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7132 r_symndx, ibfd))
7133 goto error_ret;
7134
7135 if (rel->r_offset == offset)
7136 {
7137 struct ppc_link_hash_entry *fdh = NULL;
7138
7139 /* See if the .opd entry is full 24 byte or
7140 16 byte (with fd_aux entry overlapped with next
7141 fd_func). */
7142 opd_ent_size = 24;
7143 if ((rel + 2 == relend && sec->size == offset + 16)
7144 || (rel + 3 < relend
7145 && rel[2].r_offset == offset + 16
7146 && rel[3].r_offset == offset + 24
7147 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_ADDR64
7148 && ELF64_R_TYPE (rel[3].r_info) == R_PPC64_TOC))
7149 opd_ent_size = 16;
7150
7151 if (h != NULL
7152 && h->root.root.string[0] == '.')
7153 {
7154 struct ppc_link_hash_table *htab;
7155
7156 htab = ppc_hash_table (info);
7157 if (htab != NULL)
7158 fdh = lookup_fdh ((struct ppc_link_hash_entry *) h,
7159 htab);
7160 if (fdh != NULL
7161 && fdh->elf.root.type != bfd_link_hash_defined
7162 && fdh->elf.root.type != bfd_link_hash_defweak)
7163 fdh = NULL;
7164 }
7165
7166 skip = (sym_sec->owner != ibfd
7167 || sym_sec->output_section == bfd_abs_section_ptr);
7168 if (skip)
7169 {
7170 if (fdh != NULL && sym_sec->owner == ibfd)
7171 {
7172 /* Arrange for the function descriptor sym
7173 to be dropped. */
7174 fdh->elf.root.u.def.value = 0;
7175 fdh->elf.root.u.def.section = sym_sec;
7176 }
7177 opd->adjust[rel->r_offset / 8] = -1;
7178 }
7179 else
7180 {
7181 /* We'll be keeping this opd entry. */
7182
7183 if (fdh != NULL)
7184 {
7185 /* Redefine the function descriptor symbol to
7186 this location in the opd section. It is
7187 necessary to update the value here rather
7188 than using an array of adjustments as we do
7189 for local symbols, because various places
7190 in the generic ELF code use the value
7191 stored in u.def.value. */
7192 fdh->elf.root.u.def.value = wptr - new_contents;
7193 fdh->adjust_done = 1;
7194 }
7195
7196 /* Local syms are a bit tricky. We could
7197 tweak them as they can be cached, but
7198 we'd need to look through the local syms
7199 for the function descriptor sym which we
7200 don't have at the moment. So keep an
7201 array of adjustments. */
7202 opd->adjust[rel->r_offset / 8]
7203 = (wptr - new_contents) - (rptr - sec->contents);
7204
7205 if (wptr != rptr)
7206 memcpy (wptr, rptr, opd_ent_size);
7207 wptr += opd_ent_size;
7208 if (add_aux_fields && opd_ent_size == 16)
7209 {
7210 memset (wptr, '\0', 8);
7211 wptr += 8;
7212 }
7213 }
7214 rptr += opd_ent_size;
7215 offset += opd_ent_size;
7216 }
7217
7218 if (skip)
7219 {
7220 if (!NO_OPD_RELOCS
7221 && !info->relocatable
7222 && !dec_dynrel_count (rel->r_info, sec, info,
7223 NULL, h, sym_sec))
7224 goto error_ret;
7225 }
7226 else
7227 {
7228 /* We need to adjust any reloc offsets to point to the
7229 new opd entries. While we're at it, we may as well
7230 remove redundant relocs. */
7231 rel->r_offset += opd->adjust[(offset - opd_ent_size) / 8];
7232 if (write_rel != rel)
7233 memcpy (write_rel, rel, sizeof (*rel));
7234 ++write_rel;
7235 }
7236 }
7237
7238 sec->size = wptr - new_contents;
7239 sec->reloc_count = write_rel - relstart;
7240 if (add_aux_fields)
7241 {
7242 free (sec->contents);
7243 sec->contents = new_contents;
7244 }
7245
7246 /* Fudge the header size too, as this is used later in
7247 elf_bfd_final_link if we are emitting relocs. */
7248 elf_section_data (sec)->rel_hdr.sh_size
7249 = sec->reloc_count * elf_section_data (sec)->rel_hdr.sh_entsize;
7250 BFD_ASSERT (elf_section_data (sec)->rel_hdr2 == NULL);
7251 some_edited = TRUE;
7252 }
7253 else if (elf_section_data (sec)->relocs != relstart)
7254 free (relstart);
7255
7256 if (local_syms != NULL
7257 && symtab_hdr->contents != (unsigned char *) local_syms)
7258 {
7259 if (!info->keep_memory)
7260 free (local_syms);
7261 else
7262 symtab_hdr->contents = (unsigned char *) local_syms;
7263 }
7264 }
7265
7266 if (some_edited)
7267 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
7268
7269 /* If we are doing a final link and the last .opd entry is just 16 byte
7270 long, add a 8 byte padding after it. */
7271 if (need_pad != NULL && !info->relocatable)
7272 {
7273 bfd_byte *p;
7274
7275 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
7276 {
7277 BFD_ASSERT (need_pad->size > 0);
7278
7279 p = bfd_malloc (need_pad->size + 8);
7280 if (p == NULL)
7281 return FALSE;
7282
7283 if (! bfd_get_section_contents (need_pad->owner, need_pad,
7284 p, 0, need_pad->size))
7285 return FALSE;
7286
7287 need_pad->contents = p;
7288 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
7289 }
7290 else
7291 {
7292 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
7293 if (p == NULL)
7294 return FALSE;
7295
7296 need_pad->contents = p;
7297 }
7298
7299 memset (need_pad->contents + need_pad->size, 0, 8);
7300 need_pad->size += 8;
7301 }
7302
7303 return TRUE;
7304 }
7305
7306 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
7307
7308 asection *
7309 ppc64_elf_tls_setup (struct bfd_link_info *info,
7310 int no_tls_get_addr_opt,
7311 int *no_multi_toc)
7312 {
7313 struct ppc_link_hash_table *htab;
7314
7315 htab = ppc_hash_table (info);
7316 if (htab == NULL)
7317 return NULL;
7318
7319 if (*no_multi_toc)
7320 htab->do_multi_toc = 0;
7321 else if (!htab->do_multi_toc)
7322 *no_multi_toc = 1;
7323
7324 htab->tls_get_addr = ((struct ppc_link_hash_entry *)
7325 elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
7326 FALSE, FALSE, TRUE));
7327 /* Move dynamic linking info to the function descriptor sym. */
7328 if (htab->tls_get_addr != NULL)
7329 func_desc_adjust (&htab->tls_get_addr->elf, info);
7330 htab->tls_get_addr_fd = ((struct ppc_link_hash_entry *)
7331 elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
7332 FALSE, FALSE, TRUE));
7333 if (!no_tls_get_addr_opt)
7334 {
7335 struct elf_link_hash_entry *opt, *opt_fd, *tga, *tga_fd;
7336
7337 opt = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr_opt",
7338 FALSE, FALSE, TRUE);
7339 if (opt != NULL)
7340 func_desc_adjust (opt, info);
7341 opt_fd = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
7342 FALSE, FALSE, TRUE);
7343 if (opt_fd != NULL
7344 && (opt_fd->root.type == bfd_link_hash_defined
7345 || opt_fd->root.type == bfd_link_hash_defweak))
7346 {
7347 /* If glibc supports an optimized __tls_get_addr call stub,
7348 signalled by the presence of __tls_get_addr_opt, and we'll
7349 be calling __tls_get_addr via a plt call stub, then
7350 make __tls_get_addr point to __tls_get_addr_opt. */
7351 tga_fd = &htab->tls_get_addr_fd->elf;
7352 if (htab->elf.dynamic_sections_created
7353 && tga_fd != NULL
7354 && (tga_fd->type == STT_FUNC
7355 || tga_fd->needs_plt)
7356 && !(SYMBOL_CALLS_LOCAL (info, tga_fd)
7357 || (ELF_ST_VISIBILITY (tga_fd->other) != STV_DEFAULT
7358 && tga_fd->root.type == bfd_link_hash_undefweak)))
7359 {
7360 struct plt_entry *ent;
7361
7362 for (ent = tga_fd->plt.plist; ent != NULL; ent = ent->next)
7363 if (ent->plt.refcount > 0)
7364 break;
7365 if (ent != NULL)
7366 {
7367 tga_fd->root.type = bfd_link_hash_indirect;
7368 tga_fd->root.u.i.link = &opt_fd->root;
7369 ppc64_elf_copy_indirect_symbol (info, opt_fd, tga_fd);
7370 if (opt_fd->dynindx != -1)
7371 {
7372 /* Use __tls_get_addr_opt in dynamic relocations. */
7373 opt_fd->dynindx = -1;
7374 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
7375 opt_fd->dynstr_index);
7376 if (!bfd_elf_link_record_dynamic_symbol (info, opt_fd))
7377 return FALSE;
7378 }
7379 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) opt_fd;
7380 tga = &htab->tls_get_addr->elf;
7381 if (opt != NULL && tga != NULL)
7382 {
7383 tga->root.type = bfd_link_hash_indirect;
7384 tga->root.u.i.link = &opt->root;
7385 ppc64_elf_copy_indirect_symbol (info, opt, tga);
7386 _bfd_elf_link_hash_hide_symbol (info, opt,
7387 tga->forced_local);
7388 htab->tls_get_addr = (struct ppc_link_hash_entry *) opt;
7389 }
7390 htab->tls_get_addr_fd->oh = htab->tls_get_addr;
7391 htab->tls_get_addr_fd->is_func_descriptor = 1;
7392 if (htab->tls_get_addr != NULL)
7393 {
7394 htab->tls_get_addr->oh = htab->tls_get_addr_fd;
7395 htab->tls_get_addr->is_func = 1;
7396 }
7397 }
7398 }
7399 }
7400 else
7401 no_tls_get_addr_opt = TRUE;
7402 }
7403 htab->no_tls_get_addr_opt = no_tls_get_addr_opt;
7404 return _bfd_elf_tls_setup (info->output_bfd, info);
7405 }
7406
7407 /* Return TRUE iff REL is a branch reloc with a global symbol matching
7408 HASH1 or HASH2. */
7409
7410 static bfd_boolean
7411 branch_reloc_hash_match (const bfd *ibfd,
7412 const Elf_Internal_Rela *rel,
7413 const struct ppc_link_hash_entry *hash1,
7414 const struct ppc_link_hash_entry *hash2)
7415 {
7416 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
7417 enum elf_ppc64_reloc_type r_type = ELF64_R_TYPE (rel->r_info);
7418 unsigned int r_symndx = ELF64_R_SYM (rel->r_info);
7419
7420 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
7421 {
7422 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
7423 struct elf_link_hash_entry *h;
7424
7425 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
7426 h = elf_follow_link (h);
7427 if (h == &hash1->elf || h == &hash2->elf)
7428 return TRUE;
7429 }
7430 return FALSE;
7431 }
7432
7433 /* Run through all the TLS relocs looking for optimization
7434 opportunities. The linker has been hacked (see ppc64elf.em) to do
7435 a preliminary section layout so that we know the TLS segment
7436 offsets. We can't optimize earlier because some optimizations need
7437 to know the tp offset, and we need to optimize before allocating
7438 dynamic relocations. */
7439
7440 bfd_boolean
7441 ppc64_elf_tls_optimize (struct bfd_link_info *info)
7442 {
7443 bfd *ibfd;
7444 asection *sec;
7445 struct ppc_link_hash_table *htab;
7446 int pass;
7447
7448 if (info->relocatable || !info->executable)
7449 return TRUE;
7450
7451 htab = ppc_hash_table (info);
7452 if (htab == NULL)
7453 return FALSE;
7454
7455 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7456 {
7457 Elf_Internal_Sym *locsyms = NULL;
7458 asection *toc = bfd_get_section_by_name (ibfd, ".toc");
7459 unsigned char *toc_ref = NULL;
7460
7461 /* Look at all the sections for this file. Make two passes over
7462 the relocs. On the first pass, mark toc entries involved
7463 with tls relocs, and check that tls relocs involved in
7464 setting up a tls_get_addr call are indeed followed by such a
7465 call. If they are not, exclude them from the optimizations
7466 done on the second pass. */
7467 for (pass = 0; pass < 2; ++pass)
7468 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7469 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
7470 {
7471 Elf_Internal_Rela *relstart, *rel, *relend;
7472
7473 /* Read the relocations. */
7474 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7475 info->keep_memory);
7476 if (relstart == NULL)
7477 return FALSE;
7478
7479 relend = relstart + sec->reloc_count;
7480 for (rel = relstart; rel < relend; rel++)
7481 {
7482 enum elf_ppc64_reloc_type r_type;
7483 unsigned long r_symndx;
7484 struct elf_link_hash_entry *h;
7485 Elf_Internal_Sym *sym;
7486 asection *sym_sec;
7487 unsigned char *tls_mask;
7488 unsigned char tls_set, tls_clear, tls_type = 0;
7489 bfd_vma value;
7490 bfd_boolean ok_tprel, is_local;
7491 long toc_ref_index = 0;
7492 int expecting_tls_get_addr = 0;
7493
7494 r_symndx = ELF64_R_SYM (rel->r_info);
7495 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
7496 r_symndx, ibfd))
7497 {
7498 err_free_rel:
7499 if (elf_section_data (sec)->relocs != relstart)
7500 free (relstart);
7501 if (toc_ref != NULL)
7502 free (toc_ref);
7503 if (locsyms != NULL
7504 && (elf_symtab_hdr (ibfd).contents
7505 != (unsigned char *) locsyms))
7506 free (locsyms);
7507 return FALSE;
7508 }
7509
7510 if (h != NULL)
7511 {
7512 if (h->root.type == bfd_link_hash_defined
7513 || h->root.type == bfd_link_hash_defweak)
7514 value = h->root.u.def.value;
7515 else if (h->root.type == bfd_link_hash_undefweak)
7516 value = 0;
7517 else
7518 continue;
7519 }
7520 else
7521 /* Symbols referenced by TLS relocs must be of type
7522 STT_TLS. So no need for .opd local sym adjust. */
7523 value = sym->st_value;
7524
7525 ok_tprel = FALSE;
7526 is_local = FALSE;
7527 if (h == NULL
7528 || !h->def_dynamic)
7529 {
7530 is_local = TRUE;
7531 if (h != NULL
7532 && h->root.type == bfd_link_hash_undefweak)
7533 ok_tprel = TRUE;
7534 else
7535 {
7536 value += sym_sec->output_offset;
7537 value += sym_sec->output_section->vma;
7538 value -= htab->elf.tls_sec->vma;
7539 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
7540 < (bfd_vma) 1 << 32);
7541 }
7542 }
7543
7544 r_type = ELF64_R_TYPE (rel->r_info);
7545 switch (r_type)
7546 {
7547 case R_PPC64_GOT_TLSLD16:
7548 case R_PPC64_GOT_TLSLD16_LO:
7549 expecting_tls_get_addr = 1;
7550 /* Fall thru */
7551
7552 case R_PPC64_GOT_TLSLD16_HI:
7553 case R_PPC64_GOT_TLSLD16_HA:
7554 /* These relocs should never be against a symbol
7555 defined in a shared lib. Leave them alone if
7556 that turns out to be the case. */
7557 if (!is_local)
7558 continue;
7559
7560 /* LD -> LE */
7561 tls_set = 0;
7562 tls_clear = TLS_LD;
7563 tls_type = TLS_TLS | TLS_LD;
7564 break;
7565
7566 case R_PPC64_GOT_TLSGD16:
7567 case R_PPC64_GOT_TLSGD16_LO:
7568 expecting_tls_get_addr = 1;
7569 /* Fall thru */
7570
7571 case R_PPC64_GOT_TLSGD16_HI:
7572 case R_PPC64_GOT_TLSGD16_HA:
7573 if (ok_tprel)
7574 /* GD -> LE */
7575 tls_set = 0;
7576 else
7577 /* GD -> IE */
7578 tls_set = TLS_TLS | TLS_TPRELGD;
7579 tls_clear = TLS_GD;
7580 tls_type = TLS_TLS | TLS_GD;
7581 break;
7582
7583 case R_PPC64_GOT_TPREL16_DS:
7584 case R_PPC64_GOT_TPREL16_LO_DS:
7585 case R_PPC64_GOT_TPREL16_HI:
7586 case R_PPC64_GOT_TPREL16_HA:
7587 if (ok_tprel)
7588 {
7589 /* IE -> LE */
7590 tls_set = 0;
7591 tls_clear = TLS_TPREL;
7592 tls_type = TLS_TLS | TLS_TPREL;
7593 break;
7594 }
7595 continue;
7596
7597 case R_PPC64_TOC16:
7598 case R_PPC64_TOC16_LO:
7599 case R_PPC64_TLS:
7600 case R_PPC64_TLSGD:
7601 case R_PPC64_TLSLD:
7602 if (sym_sec == NULL || sym_sec != toc)
7603 continue;
7604
7605 /* Mark this toc entry as referenced by a TLS
7606 code sequence. We can do that now in the
7607 case of R_PPC64_TLS, and after checking for
7608 tls_get_addr for the TOC16 relocs. */
7609 if (toc_ref == NULL)
7610 {
7611 toc_ref = bfd_zmalloc (toc->size / 8);
7612 if (toc_ref == NULL)
7613 goto err_free_rel;
7614 }
7615 if (h != NULL)
7616 value = h->root.u.def.value;
7617 else
7618 value = sym->st_value;
7619 value += rel->r_addend;
7620 BFD_ASSERT (value < toc->size && value % 8 == 0);
7621 toc_ref_index = value / 8;
7622 if (r_type == R_PPC64_TLS
7623 || r_type == R_PPC64_TLSGD
7624 || r_type == R_PPC64_TLSLD)
7625 {
7626 toc_ref[toc_ref_index] = 1;
7627 continue;
7628 }
7629
7630 if (pass != 0 && toc_ref[toc_ref_index] == 0)
7631 continue;
7632
7633 tls_set = 0;
7634 tls_clear = 0;
7635 expecting_tls_get_addr = 2;
7636 break;
7637
7638 case R_PPC64_TPREL64:
7639 if (pass == 0
7640 || sec != toc
7641 || toc_ref == NULL
7642 || !toc_ref[rel->r_offset / 8])
7643 continue;
7644 if (ok_tprel)
7645 {
7646 /* IE -> LE */
7647 tls_set = TLS_EXPLICIT;
7648 tls_clear = TLS_TPREL;
7649 break;
7650 }
7651 continue;
7652
7653 case R_PPC64_DTPMOD64:
7654 if (pass == 0
7655 || sec != toc
7656 || toc_ref == NULL
7657 || !toc_ref[rel->r_offset / 8])
7658 continue;
7659 if (rel + 1 < relend
7660 && (rel[1].r_info
7661 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
7662 && rel[1].r_offset == rel->r_offset + 8)
7663 {
7664 if (ok_tprel)
7665 /* GD -> LE */
7666 tls_set = TLS_EXPLICIT | TLS_GD;
7667 else
7668 /* GD -> IE */
7669 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
7670 tls_clear = TLS_GD;
7671 }
7672 else
7673 {
7674 if (!is_local)
7675 continue;
7676
7677 /* LD -> LE */
7678 tls_set = TLS_EXPLICIT;
7679 tls_clear = TLS_LD;
7680 }
7681 break;
7682
7683 default:
7684 continue;
7685 }
7686
7687 if (pass == 0)
7688 {
7689 if (!expecting_tls_get_addr
7690 || !sec->has_tls_get_addr_call)
7691 continue;
7692
7693 if (rel + 1 < relend
7694 && branch_reloc_hash_match (ibfd, rel + 1,
7695 htab->tls_get_addr,
7696 htab->tls_get_addr_fd))
7697 {
7698 if (expecting_tls_get_addr == 2)
7699 {
7700 /* Check for toc tls entries. */
7701 unsigned char *toc_tls;
7702 int retval;
7703
7704 retval = get_tls_mask (&toc_tls, NULL, NULL,
7705 &locsyms,
7706 rel, ibfd);
7707 if (retval == 0)
7708 goto err_free_rel;
7709 if (retval > 1 && toc_tls != NULL)
7710 toc_ref[toc_ref_index] = 1;
7711 }
7712 continue;
7713 }
7714
7715 if (expecting_tls_get_addr != 1)
7716 continue;
7717
7718 /* Uh oh, we didn't find the expected call. We
7719 could just mark this symbol to exclude it
7720 from tls optimization but it's safer to skip
7721 the entire section. */
7722 sec->has_tls_reloc = 0;
7723 break;
7724 }
7725
7726 if (expecting_tls_get_addr && htab->tls_get_addr != NULL)
7727 {
7728 struct plt_entry *ent;
7729 for (ent = htab->tls_get_addr->elf.plt.plist;
7730 ent != NULL;
7731 ent = ent->next)
7732 if (ent->addend == 0)
7733 {
7734 if (ent->plt.refcount > 0)
7735 {
7736 ent->plt.refcount -= 1;
7737 expecting_tls_get_addr = 0;
7738 }
7739 break;
7740 }
7741 }
7742
7743 if (expecting_tls_get_addr && htab->tls_get_addr_fd != NULL)
7744 {
7745 struct plt_entry *ent;
7746 for (ent = htab->tls_get_addr_fd->elf.plt.plist;
7747 ent != NULL;
7748 ent = ent->next)
7749 if (ent->addend == 0)
7750 {
7751 if (ent->plt.refcount > 0)
7752 ent->plt.refcount -= 1;
7753 break;
7754 }
7755 }
7756
7757 if (tls_clear == 0)
7758 continue;
7759
7760 if ((tls_set & TLS_EXPLICIT) == 0)
7761 {
7762 struct got_entry *ent;
7763
7764 /* Adjust got entry for this reloc. */
7765 if (h != NULL)
7766 ent = h->got.glist;
7767 else
7768 ent = elf_local_got_ents (ibfd)[r_symndx];
7769
7770 for (; ent != NULL; ent = ent->next)
7771 if (ent->addend == rel->r_addend
7772 && ent->owner == ibfd
7773 && ent->tls_type == tls_type)
7774 break;
7775 if (ent == NULL)
7776 abort ();
7777
7778 if (tls_set == 0)
7779 {
7780 /* We managed to get rid of a got entry. */
7781 if (ent->got.refcount > 0)
7782 ent->got.refcount -= 1;
7783 }
7784 }
7785 else
7786 {
7787 /* If we got rid of a DTPMOD/DTPREL reloc pair then
7788 we'll lose one or two dyn relocs. */
7789 if (!dec_dynrel_count (rel->r_info, sec, info,
7790 NULL, h, sym_sec))
7791 return FALSE;
7792
7793 if (tls_set == (TLS_EXPLICIT | TLS_GD))
7794 {
7795 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
7796 NULL, h, sym_sec))
7797 return FALSE;
7798 }
7799 }
7800
7801 *tls_mask |= tls_set;
7802 *tls_mask &= ~tls_clear;
7803 }
7804
7805 if (elf_section_data (sec)->relocs != relstart)
7806 free (relstart);
7807 }
7808
7809 if (toc_ref != NULL)
7810 free (toc_ref);
7811
7812 if (locsyms != NULL
7813 && (elf_symtab_hdr (ibfd).contents != (unsigned char *) locsyms))
7814 {
7815 if (!info->keep_memory)
7816 free (locsyms);
7817 else
7818 elf_symtab_hdr (ibfd).contents = (unsigned char *) locsyms;
7819 }
7820 }
7821 return TRUE;
7822 }
7823
7824 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
7825 the values of any global symbols in a toc section that has been
7826 edited. Globals in toc sections should be a rarity, so this function
7827 sets a flag if any are found in toc sections other than the one just
7828 edited, so that futher hash table traversals can be avoided. */
7829
7830 struct adjust_toc_info
7831 {
7832 asection *toc;
7833 unsigned long *skip;
7834 bfd_boolean global_toc_syms;
7835 };
7836
7837 static bfd_boolean
7838 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
7839 {
7840 struct ppc_link_hash_entry *eh;
7841 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
7842
7843 if (h->root.type == bfd_link_hash_indirect)
7844 return TRUE;
7845
7846 if (h->root.type == bfd_link_hash_warning)
7847 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7848
7849 if (h->root.type != bfd_link_hash_defined
7850 && h->root.type != bfd_link_hash_defweak)
7851 return TRUE;
7852
7853 eh = (struct ppc_link_hash_entry *) h;
7854 if (eh->adjust_done)
7855 return TRUE;
7856
7857 if (eh->elf.root.u.def.section == toc_inf->toc)
7858 {
7859 unsigned long skip = toc_inf->skip[eh->elf.root.u.def.value >> 3];
7860 if (skip != (unsigned long) -1)
7861 eh->elf.root.u.def.value -= skip;
7862 else
7863 {
7864 (*_bfd_error_handler)
7865 (_("%s defined in removed toc entry"), eh->elf.root.root.string);
7866 eh->elf.root.u.def.section = &bfd_abs_section;
7867 eh->elf.root.u.def.value = 0;
7868 }
7869 eh->adjust_done = 1;
7870 }
7871 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
7872 toc_inf->global_toc_syms = TRUE;
7873
7874 return TRUE;
7875 }
7876
7877 /* Examine all relocs referencing .toc sections in order to remove
7878 unused .toc entries. */
7879
7880 bfd_boolean
7881 ppc64_elf_edit_toc (struct bfd_link_info *info)
7882 {
7883 bfd *ibfd;
7884 struct adjust_toc_info toc_inf;
7885
7886 toc_inf.global_toc_syms = TRUE;
7887 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7888 {
7889 asection *toc, *sec;
7890 Elf_Internal_Shdr *symtab_hdr;
7891 Elf_Internal_Sym *local_syms;
7892 struct elf_link_hash_entry **sym_hashes;
7893 Elf_Internal_Rela *relstart, *rel;
7894 unsigned long *skip, *drop;
7895 unsigned char *used;
7896 unsigned char *keep, last, some_unused;
7897
7898 toc = bfd_get_section_by_name (ibfd, ".toc");
7899 if (toc == NULL
7900 || toc->size == 0
7901 || toc->sec_info_type == ELF_INFO_TYPE_JUST_SYMS
7902 || elf_discarded_section (toc))
7903 continue;
7904
7905 local_syms = NULL;
7906 symtab_hdr = &elf_symtab_hdr (ibfd);
7907 sym_hashes = elf_sym_hashes (ibfd);
7908
7909 /* Look at sections dropped from the final link. */
7910 skip = NULL;
7911 relstart = NULL;
7912 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7913 {
7914 if (sec->reloc_count == 0
7915 || !elf_discarded_section (sec)
7916 || get_opd_info (sec)
7917 || (sec->flags & SEC_ALLOC) == 0
7918 || (sec->flags & SEC_DEBUGGING) != 0)
7919 continue;
7920
7921 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
7922 if (relstart == NULL)
7923 goto error_ret;
7924
7925 /* Run through the relocs to see which toc entries might be
7926 unused. */
7927 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
7928 {
7929 enum elf_ppc64_reloc_type r_type;
7930 unsigned long r_symndx;
7931 asection *sym_sec;
7932 struct elf_link_hash_entry *h;
7933 Elf_Internal_Sym *sym;
7934 bfd_vma val;
7935
7936 r_type = ELF64_R_TYPE (rel->r_info);
7937 switch (r_type)
7938 {
7939 default:
7940 continue;
7941
7942 case R_PPC64_TOC16:
7943 case R_PPC64_TOC16_LO:
7944 case R_PPC64_TOC16_HI:
7945 case R_PPC64_TOC16_HA:
7946 case R_PPC64_TOC16_DS:
7947 case R_PPC64_TOC16_LO_DS:
7948 break;
7949 }
7950
7951 r_symndx = ELF64_R_SYM (rel->r_info);
7952 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7953 r_symndx, ibfd))
7954 goto error_ret;
7955
7956 if (sym_sec != toc)
7957 continue;
7958
7959 if (h != NULL)
7960 val = h->root.u.def.value;
7961 else
7962 val = sym->st_value;
7963 val += rel->r_addend;
7964
7965 if (val >= toc->size)
7966 continue;
7967
7968 /* Anything in the toc ought to be aligned to 8 bytes.
7969 If not, don't mark as unused. */
7970 if (val & 7)
7971 continue;
7972
7973 if (skip == NULL)
7974 {
7975 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 7) / 8);
7976 if (skip == NULL)
7977 goto error_ret;
7978 }
7979
7980 skip[val >> 3] = 1;
7981 }
7982
7983 if (elf_section_data (sec)->relocs != relstart)
7984 free (relstart);
7985 }
7986
7987 if (skip == NULL)
7988 continue;
7989
7990 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
7991 if (used == NULL)
7992 {
7993 error_ret:
7994 if (local_syms != NULL
7995 && symtab_hdr->contents != (unsigned char *) local_syms)
7996 free (local_syms);
7997 if (sec != NULL
7998 && relstart != NULL
7999 && elf_section_data (sec)->relocs != relstart)
8000 free (relstart);
8001 if (skip != NULL)
8002 free (skip);
8003 return FALSE;
8004 }
8005
8006 /* Now check all kept sections that might reference the toc.
8007 Check the toc itself last. */
8008 for (sec = (ibfd->sections == toc && toc->next ? toc->next
8009 : ibfd->sections);
8010 sec != NULL;
8011 sec = (sec == toc ? NULL
8012 : sec->next == NULL ? toc
8013 : sec->next == toc && toc->next ? toc->next
8014 : sec->next))
8015 {
8016 int repeat;
8017
8018 if (sec->reloc_count == 0
8019 || elf_discarded_section (sec)
8020 || get_opd_info (sec)
8021 || (sec->flags & SEC_ALLOC) == 0
8022 || (sec->flags & SEC_DEBUGGING) != 0)
8023 continue;
8024
8025 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, TRUE);
8026 if (relstart == NULL)
8027 goto error_ret;
8028
8029 /* Mark toc entries referenced as used. */
8030 repeat = 0;
8031 do
8032 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8033 {
8034 enum elf_ppc64_reloc_type r_type;
8035 unsigned long r_symndx;
8036 asection *sym_sec;
8037 struct elf_link_hash_entry *h;
8038 Elf_Internal_Sym *sym;
8039 bfd_vma val;
8040
8041 r_type = ELF64_R_TYPE (rel->r_info);
8042 switch (r_type)
8043 {
8044 case R_PPC64_TOC16:
8045 case R_PPC64_TOC16_LO:
8046 case R_PPC64_TOC16_HI:
8047 case R_PPC64_TOC16_HA:
8048 case R_PPC64_TOC16_DS:
8049 case R_PPC64_TOC16_LO_DS:
8050 /* In case we're taking addresses of toc entries. */
8051 case R_PPC64_ADDR64:
8052 break;
8053
8054 default:
8055 continue;
8056 }
8057
8058 r_symndx = ELF64_R_SYM (rel->r_info);
8059 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8060 r_symndx, ibfd))
8061 {
8062 free (used);
8063 goto error_ret;
8064 }
8065
8066 if (sym_sec != toc)
8067 continue;
8068
8069 if (h != NULL)
8070 val = h->root.u.def.value;
8071 else
8072 val = sym->st_value;
8073 val += rel->r_addend;
8074
8075 if (val >= toc->size)
8076 continue;
8077
8078 /* For the toc section, we only mark as used if
8079 this entry itself isn't unused. */
8080 if (sec == toc
8081 && !used[val >> 3]
8082 && (used[rel->r_offset >> 3]
8083 || !skip[rel->r_offset >> 3]))
8084 /* Do all the relocs again, to catch reference
8085 chains. */
8086 repeat = 1;
8087
8088 used[val >> 3] = 1;
8089 }
8090 while (repeat);
8091 }
8092
8093 /* Merge the used and skip arrays. Assume that TOC
8094 doublewords not appearing as either used or unused belong
8095 to to an entry more than one doubleword in size. */
8096 for (drop = skip, keep = used, last = 0, some_unused = 0;
8097 drop < skip + (toc->size + 7) / 8;
8098 ++drop, ++keep)
8099 {
8100 if (*keep)
8101 {
8102 *drop = 0;
8103 last = 0;
8104 }
8105 else if (*drop)
8106 {
8107 some_unused = 1;
8108 last = 1;
8109 }
8110 else
8111 *drop = last;
8112 }
8113
8114 free (used);
8115
8116 if (some_unused)
8117 {
8118 bfd_byte *contents, *src;
8119 unsigned long off;
8120
8121 /* Shuffle the toc contents, and at the same time convert the
8122 skip array from booleans into offsets. */
8123 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
8124 goto error_ret;
8125
8126 elf_section_data (toc)->this_hdr.contents = contents;
8127
8128 for (src = contents, off = 0, drop = skip;
8129 src < contents + toc->size;
8130 src += 8, ++drop)
8131 {
8132 if (*drop)
8133 {
8134 *drop = (unsigned long) -1;
8135 off += 8;
8136 }
8137 else if (off != 0)
8138 {
8139 *drop = off;
8140 memcpy (src - off, src, 8);
8141 }
8142 }
8143 toc->rawsize = toc->size;
8144 toc->size = src - contents - off;
8145
8146 if (toc->reloc_count != 0)
8147 {
8148 Elf_Internal_Rela *wrel;
8149 bfd_size_type sz;
8150
8151 /* Read toc relocs. */
8152 relstart = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
8153 TRUE);
8154 if (relstart == NULL)
8155 goto error_ret;
8156
8157 /* Remove unused toc relocs, and adjust those we keep. */
8158 wrel = relstart;
8159 for (rel = relstart; rel < relstart + toc->reloc_count; ++rel)
8160 if (skip[rel->r_offset >> 3] != (unsigned long) -1)
8161 {
8162 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
8163 wrel->r_info = rel->r_info;
8164 wrel->r_addend = rel->r_addend;
8165 ++wrel;
8166 }
8167 else if (!dec_dynrel_count (rel->r_info, toc, info,
8168 &local_syms, NULL, NULL))
8169 goto error_ret;
8170
8171 toc->reloc_count = wrel - relstart;
8172 sz = elf_section_data (toc)->rel_hdr.sh_entsize;
8173 elf_section_data (toc)->rel_hdr.sh_size = toc->reloc_count * sz;
8174 BFD_ASSERT (elf_section_data (toc)->rel_hdr2 == NULL);
8175 }
8176
8177 /* Adjust addends for relocs against the toc section sym. */
8178 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8179 {
8180 if (sec->reloc_count == 0
8181 || elf_discarded_section (sec))
8182 continue;
8183
8184 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8185 TRUE);
8186 if (relstart == NULL)
8187 goto error_ret;
8188
8189 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8190 {
8191 enum elf_ppc64_reloc_type r_type;
8192 unsigned long r_symndx;
8193 asection *sym_sec;
8194 struct elf_link_hash_entry *h;
8195 Elf_Internal_Sym *sym;
8196
8197 r_type = ELF64_R_TYPE (rel->r_info);
8198 switch (r_type)
8199 {
8200 default:
8201 continue;
8202
8203 case R_PPC64_TOC16:
8204 case R_PPC64_TOC16_LO:
8205 case R_PPC64_TOC16_HI:
8206 case R_PPC64_TOC16_HA:
8207 case R_PPC64_TOC16_DS:
8208 case R_PPC64_TOC16_LO_DS:
8209 case R_PPC64_ADDR64:
8210 break;
8211 }
8212
8213 r_symndx = ELF64_R_SYM (rel->r_info);
8214 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8215 r_symndx, ibfd))
8216 goto error_ret;
8217
8218 if (sym_sec != toc || h != NULL || sym->st_value != 0)
8219 continue;
8220
8221 rel->r_addend -= skip[rel->r_addend >> 3];
8222 }
8223 }
8224
8225 /* We shouldn't have local or global symbols defined in the TOC,
8226 but handle them anyway. */
8227 if (local_syms != NULL)
8228 {
8229 Elf_Internal_Sym *sym;
8230
8231 for (sym = local_syms;
8232 sym < local_syms + symtab_hdr->sh_info;
8233 ++sym)
8234 if (sym->st_value != 0
8235 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
8236 {
8237 if (skip[sym->st_value >> 3] != (unsigned long) -1)
8238 sym->st_value -= skip[sym->st_value >> 3];
8239 else
8240 {
8241 (*_bfd_error_handler)
8242 (_("%s defined in removed toc entry"),
8243 bfd_elf_sym_name (ibfd, symtab_hdr, sym,
8244 NULL));
8245 sym->st_value = 0;
8246 sym->st_shndx = SHN_ABS;
8247 }
8248 symtab_hdr->contents = (unsigned char *) local_syms;
8249 }
8250 }
8251
8252 /* Finally, adjust any global syms defined in the toc. */
8253 if (toc_inf.global_toc_syms)
8254 {
8255 toc_inf.toc = toc;
8256 toc_inf.skip = skip;
8257 toc_inf.global_toc_syms = FALSE;
8258 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
8259 &toc_inf);
8260 }
8261 }
8262
8263 if (local_syms != NULL
8264 && symtab_hdr->contents != (unsigned char *) local_syms)
8265 {
8266 if (!info->keep_memory)
8267 free (local_syms);
8268 else
8269 symtab_hdr->contents = (unsigned char *) local_syms;
8270 }
8271 free (skip);
8272 }
8273
8274 return TRUE;
8275 }
8276
8277 /* Allocate space for one GOT entry. */
8278
8279 static void
8280 allocate_got (struct elf_link_hash_entry *h,
8281 struct bfd_link_info *info,
8282 struct got_entry *gent)
8283 {
8284 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8285 bfd_boolean dyn;
8286 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
8287 int entsize = (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)
8288 ? 16 : 8);
8289 int rentsize = (gent->tls_type & eh->tls_mask & TLS_GD
8290 ? 2 : 1) * sizeof (Elf64_External_Rela);
8291 asection *got = ppc64_elf_tdata (gent->owner)->got;
8292
8293 gent->got.offset = got->size;
8294 got->size += entsize;
8295
8296 dyn = htab->elf.dynamic_sections_created;
8297 if ((info->shared
8298 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
8299 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
8300 || h->root.type != bfd_link_hash_undefweak))
8301 {
8302 asection *relgot = ppc64_elf_tdata (gent->owner)->relgot;
8303 relgot->size += rentsize;
8304 }
8305 else if (h->type == STT_GNU_IFUNC)
8306 {
8307 asection *relgot = htab->reliplt;
8308 relgot->size += rentsize;
8309 htab->got_reli_size += rentsize;
8310 }
8311 }
8312
8313 /* This function merges got entries in the same toc group. */
8314
8315 static void
8316 merge_got_entries (struct got_entry **pent)
8317 {
8318 struct got_entry *ent, *ent2;
8319
8320 for (ent = *pent; ent != NULL; ent = ent->next)
8321 if (!ent->is_indirect)
8322 for (ent2 = ent->next; ent2 != NULL; ent2 = ent2->next)
8323 if (!ent2->is_indirect
8324 && ent2->addend == ent->addend
8325 && ent2->tls_type == ent->tls_type
8326 && elf_gp (ent2->owner) == elf_gp (ent->owner))
8327 {
8328 ent2->is_indirect = TRUE;
8329 ent2->got.ent = ent;
8330 }
8331 }
8332
8333 /* Allocate space in .plt, .got and associated reloc sections for
8334 dynamic relocs. */
8335
8336 static bfd_boolean
8337 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
8338 {
8339 struct bfd_link_info *info;
8340 struct ppc_link_hash_table *htab;
8341 asection *s;
8342 struct ppc_link_hash_entry *eh;
8343 struct ppc_dyn_relocs *p;
8344 struct got_entry **pgent, *gent;
8345
8346 if (h->root.type == bfd_link_hash_indirect)
8347 return TRUE;
8348
8349 if (h->root.type == bfd_link_hash_warning)
8350 h = (struct elf_link_hash_entry *) h->root.u.i.link;
8351
8352 info = (struct bfd_link_info *) inf;
8353 htab = ppc_hash_table (info);
8354 if (htab == NULL)
8355 return FALSE;
8356
8357 if ((htab->elf.dynamic_sections_created
8358 && h->dynindx != -1
8359 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h))
8360 || h->type == STT_GNU_IFUNC)
8361 {
8362 struct plt_entry *pent;
8363 bfd_boolean doneone = FALSE;
8364 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
8365 if (pent->plt.refcount > 0)
8366 {
8367 if (!htab->elf.dynamic_sections_created
8368 || h->dynindx == -1)
8369 {
8370 s = htab->iplt;
8371 pent->plt.offset = s->size;
8372 s->size += PLT_ENTRY_SIZE;
8373 s = htab->reliplt;
8374 }
8375 else
8376 {
8377 /* If this is the first .plt entry, make room for the special
8378 first entry. */
8379 s = htab->plt;
8380 if (s->size == 0)
8381 s->size += PLT_INITIAL_ENTRY_SIZE;
8382
8383 pent->plt.offset = s->size;
8384
8385 /* Make room for this entry. */
8386 s->size += PLT_ENTRY_SIZE;
8387
8388 /* Make room for the .glink code. */
8389 s = htab->glink;
8390 if (s->size == 0)
8391 s->size += GLINK_CALL_STUB_SIZE;
8392 /* We need bigger stubs past index 32767. */
8393 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
8394 s->size += 4;
8395 s->size += 2*4;
8396
8397 /* We also need to make an entry in the .rela.plt section. */
8398 s = htab->relplt;
8399 }
8400 s->size += sizeof (Elf64_External_Rela);
8401 doneone = TRUE;
8402 }
8403 else
8404 pent->plt.offset = (bfd_vma) -1;
8405 if (!doneone)
8406 {
8407 h->plt.plist = NULL;
8408 h->needs_plt = 0;
8409 }
8410 }
8411 else
8412 {
8413 h->plt.plist = NULL;
8414 h->needs_plt = 0;
8415 }
8416
8417 eh = (struct ppc_link_hash_entry *) h;
8418 /* Run through the TLS GD got entries first if we're changing them
8419 to TPREL. */
8420 if ((eh->tls_mask & TLS_TPRELGD) != 0)
8421 for (gent = h->got.glist; gent != NULL; gent = gent->next)
8422 if (gent->got.refcount > 0
8423 && (gent->tls_type & TLS_GD) != 0)
8424 {
8425 /* This was a GD entry that has been converted to TPREL. If
8426 there happens to be a TPREL entry we can use that one. */
8427 struct got_entry *ent;
8428 for (ent = h->got.glist; ent != NULL; ent = ent->next)
8429 if (ent->got.refcount > 0
8430 && (ent->tls_type & TLS_TPREL) != 0
8431 && ent->addend == gent->addend
8432 && ent->owner == gent->owner)
8433 {
8434 gent->got.refcount = 0;
8435 break;
8436 }
8437
8438 /* If not, then we'll be using our own TPREL entry. */
8439 if (gent->got.refcount != 0)
8440 gent->tls_type = TLS_TLS | TLS_TPREL;
8441 }
8442
8443 /* Remove any list entry that won't generate a word in the GOT before
8444 we call merge_got_entries. Otherwise we risk merging to empty
8445 entries. */
8446 pgent = &h->got.glist;
8447 while ((gent = *pgent) != NULL)
8448 if (gent->got.refcount > 0)
8449 {
8450 if ((gent->tls_type & TLS_LD) != 0
8451 && !h->def_dynamic)
8452 {
8453 ppc64_tlsld_got (gent->owner)->got.refcount += 1;
8454 *pgent = gent->next;
8455 }
8456 else
8457 pgent = &gent->next;
8458 }
8459 else
8460 *pgent = gent->next;
8461
8462 if (!htab->do_multi_toc)
8463 merge_got_entries (&h->got.glist);
8464
8465 for (gent = h->got.glist; gent != NULL; gent = gent->next)
8466 if (!gent->is_indirect)
8467 {
8468 /* Make sure this symbol is output as a dynamic symbol.
8469 Undefined weak syms won't yet be marked as dynamic,
8470 nor will all TLS symbols. */
8471 if (h->dynindx == -1
8472 && !h->forced_local
8473 && h->type != STT_GNU_IFUNC
8474 && htab->elf.dynamic_sections_created)
8475 {
8476 if (! bfd_elf_link_record_dynamic_symbol (info, h))
8477 return FALSE;
8478 }
8479
8480 if (!is_ppc64_elf (gent->owner))
8481 abort ();
8482
8483 allocate_got (h, info, gent);
8484 }
8485
8486 if (eh->dyn_relocs == NULL
8487 || (!htab->elf.dynamic_sections_created
8488 && h->type != STT_GNU_IFUNC))
8489 return TRUE;
8490
8491 /* In the shared -Bsymbolic case, discard space allocated for
8492 dynamic pc-relative relocs against symbols which turn out to be
8493 defined in regular objects. For the normal shared case, discard
8494 space for relocs that have become local due to symbol visibility
8495 changes. */
8496
8497 if (info->shared)
8498 {
8499 /* Relocs that use pc_count are those that appear on a call insn,
8500 or certain REL relocs (see must_be_dyn_reloc) that can be
8501 generated via assembly. We want calls to protected symbols to
8502 resolve directly to the function rather than going via the plt.
8503 If people want function pointer comparisons to work as expected
8504 then they should avoid writing weird assembly. */
8505 if (SYMBOL_CALLS_LOCAL (info, h))
8506 {
8507 struct ppc_dyn_relocs **pp;
8508
8509 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
8510 {
8511 p->count -= p->pc_count;
8512 p->pc_count = 0;
8513 if (p->count == 0)
8514 *pp = p->next;
8515 else
8516 pp = &p->next;
8517 }
8518 }
8519
8520 /* Also discard relocs on undefined weak syms with non-default
8521 visibility. */
8522 if (eh->dyn_relocs != NULL
8523 && h->root.type == bfd_link_hash_undefweak)
8524 {
8525 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
8526 eh->dyn_relocs = NULL;
8527
8528 /* Make sure this symbol is output as a dynamic symbol.
8529 Undefined weak syms won't yet be marked as dynamic. */
8530 else if (h->dynindx == -1
8531 && !h->forced_local)
8532 {
8533 if (! bfd_elf_link_record_dynamic_symbol (info, h))
8534 return FALSE;
8535 }
8536 }
8537 }
8538 else if (h->type == STT_GNU_IFUNC)
8539 {
8540 if (!h->non_got_ref)
8541 eh->dyn_relocs = NULL;
8542 }
8543 else if (ELIMINATE_COPY_RELOCS)
8544 {
8545 /* For the non-shared case, discard space for relocs against
8546 symbols which turn out to need copy relocs or are not
8547 dynamic. */
8548
8549 if (!h->non_got_ref
8550 && !h->def_regular)
8551 {
8552 /* Make sure this symbol is output as a dynamic symbol.
8553 Undefined weak syms won't yet be marked as dynamic. */
8554 if (h->dynindx == -1
8555 && !h->forced_local)
8556 {
8557 if (! bfd_elf_link_record_dynamic_symbol (info, h))
8558 return FALSE;
8559 }
8560
8561 /* If that succeeded, we know we'll be keeping all the
8562 relocs. */
8563 if (h->dynindx != -1)
8564 goto keep;
8565 }
8566
8567 eh->dyn_relocs = NULL;
8568
8569 keep: ;
8570 }
8571
8572 /* Finally, allocate space. */
8573 for (p = eh->dyn_relocs; p != NULL; p = p->next)
8574 {
8575 asection *sreloc = elf_section_data (p->sec)->sreloc;
8576 if (!htab->elf.dynamic_sections_created)
8577 sreloc = htab->reliplt;
8578 sreloc->size += p->count * sizeof (Elf64_External_Rela);
8579 }
8580
8581 return TRUE;
8582 }
8583
8584 /* Find any dynamic relocs that apply to read-only sections. */
8585
8586 static bfd_boolean
8587 readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
8588 {
8589 struct ppc_link_hash_entry *eh;
8590 struct ppc_dyn_relocs *p;
8591
8592 if (h->root.type == bfd_link_hash_warning)
8593 h = (struct elf_link_hash_entry *) h->root.u.i.link;
8594
8595 eh = (struct ppc_link_hash_entry *) h;
8596 for (p = eh->dyn_relocs; p != NULL; p = p->next)
8597 {
8598 asection *s = p->sec->output_section;
8599
8600 if (s != NULL && (s->flags & SEC_READONLY) != 0)
8601 {
8602 struct bfd_link_info *info = inf;
8603
8604 info->flags |= DF_TEXTREL;
8605
8606 /* Not an error, just cut short the traversal. */
8607 return FALSE;
8608 }
8609 }
8610 return TRUE;
8611 }
8612
8613 /* Set the sizes of the dynamic sections. */
8614
8615 static bfd_boolean
8616 ppc64_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
8617 struct bfd_link_info *info)
8618 {
8619 struct ppc_link_hash_table *htab;
8620 bfd *dynobj;
8621 asection *s;
8622 bfd_boolean relocs;
8623 bfd *ibfd;
8624 struct got_entry *first_tlsld;
8625
8626 htab = ppc_hash_table (info);
8627 if (htab == NULL)
8628 return FALSE;
8629
8630 dynobj = htab->elf.dynobj;
8631 if (dynobj == NULL)
8632 abort ();
8633
8634 if (htab->elf.dynamic_sections_created)
8635 {
8636 /* Set the contents of the .interp section to the interpreter. */
8637 if (info->executable)
8638 {
8639 s = bfd_get_section_by_name (dynobj, ".interp");
8640 if (s == NULL)
8641 abort ();
8642 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
8643 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
8644 }
8645 }
8646
8647 /* Set up .got offsets for local syms, and space for local dynamic
8648 relocs. */
8649 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8650 {
8651 struct got_entry **lgot_ents;
8652 struct got_entry **end_lgot_ents;
8653 struct plt_entry **local_plt;
8654 struct plt_entry **end_local_plt;
8655 unsigned char *lgot_masks;
8656 bfd_size_type locsymcount;
8657 Elf_Internal_Shdr *symtab_hdr;
8658 asection *srel;
8659
8660 if (!is_ppc64_elf (ibfd))
8661 continue;
8662
8663 for (s = ibfd->sections; s != NULL; s = s->next)
8664 {
8665 struct ppc_dyn_relocs *p;
8666
8667 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
8668 {
8669 if (!bfd_is_abs_section (p->sec)
8670 && bfd_is_abs_section (p->sec->output_section))
8671 {
8672 /* Input section has been discarded, either because
8673 it is a copy of a linkonce section or due to
8674 linker script /DISCARD/, so we'll be discarding
8675 the relocs too. */
8676 }
8677 else if (p->count != 0)
8678 {
8679 srel = elf_section_data (p->sec)->sreloc;
8680 if (!htab->elf.dynamic_sections_created)
8681 srel = htab->reliplt;
8682 srel->size += p->count * sizeof (Elf64_External_Rela);
8683 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
8684 info->flags |= DF_TEXTREL;
8685 }
8686 }
8687 }
8688
8689 lgot_ents = elf_local_got_ents (ibfd);
8690 if (!lgot_ents)
8691 continue;
8692
8693 symtab_hdr = &elf_symtab_hdr (ibfd);
8694 locsymcount = symtab_hdr->sh_info;
8695 end_lgot_ents = lgot_ents + locsymcount;
8696 local_plt = (struct plt_entry **) end_lgot_ents;
8697 end_local_plt = local_plt + locsymcount;
8698 lgot_masks = (unsigned char *) end_local_plt;
8699 s = ppc64_elf_tdata (ibfd)->got;
8700 srel = ppc64_elf_tdata (ibfd)->relgot;
8701 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
8702 {
8703 struct got_entry **pent, *ent;
8704
8705 pent = lgot_ents;
8706 while ((ent = *pent) != NULL)
8707 if (ent->got.refcount > 0)
8708 {
8709 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
8710 {
8711 ppc64_tlsld_got (ibfd)->got.refcount += 1;
8712 *pent = ent->next;
8713 }
8714 else
8715 {
8716 unsigned int num = 1;
8717 ent->got.offset = s->size;
8718 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
8719 num = 2;
8720 s->size += num * 8;
8721 if (info->shared)
8722 srel->size += num * sizeof (Elf64_External_Rela);
8723 else if ((*lgot_masks & PLT_IFUNC) != 0)
8724 {
8725 htab->reliplt->size
8726 += num * sizeof (Elf64_External_Rela);
8727 htab->got_reli_size
8728 += num * sizeof (Elf64_External_Rela);
8729 }
8730 pent = &ent->next;
8731 }
8732 }
8733 else
8734 *pent = ent->next;
8735 }
8736
8737 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
8738 for (; local_plt < end_local_plt; ++local_plt)
8739 {
8740 struct plt_entry *ent;
8741
8742 for (ent = *local_plt; ent != NULL; ent = ent->next)
8743 if (ent->plt.refcount > 0)
8744 {
8745 s = htab->iplt;
8746 ent->plt.offset = s->size;
8747 s->size += PLT_ENTRY_SIZE;
8748
8749 htab->reliplt->size += sizeof (Elf64_External_Rela);
8750 }
8751 else
8752 ent->plt.offset = (bfd_vma) -1;
8753 }
8754 }
8755
8756 /* Allocate global sym .plt and .got entries, and space for global
8757 sym dynamic relocs. */
8758 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
8759
8760 first_tlsld = NULL;
8761 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8762 {
8763 struct got_entry *ent;
8764
8765 if (!is_ppc64_elf (ibfd))
8766 continue;
8767
8768 ent = ppc64_tlsld_got (ibfd);
8769 if (ent->got.refcount > 0)
8770 {
8771 if (!htab->do_multi_toc && first_tlsld != NULL)
8772 {
8773 ent->is_indirect = TRUE;
8774 ent->got.ent = first_tlsld;
8775 }
8776 else
8777 {
8778 if (first_tlsld == NULL)
8779 first_tlsld = ent;
8780 s = ppc64_elf_tdata (ibfd)->got;
8781 ent->got.offset = s->size;
8782 ent->owner = ibfd;
8783 s->size += 16;
8784 if (info->shared)
8785 {
8786 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
8787 srel->size += sizeof (Elf64_External_Rela);
8788 }
8789 }
8790 }
8791 else
8792 ent->got.offset = (bfd_vma) -1;
8793 }
8794
8795 /* We now have determined the sizes of the various dynamic sections.
8796 Allocate memory for them. */
8797 relocs = FALSE;
8798 for (s = dynobj->sections; s != NULL; s = s->next)
8799 {
8800 if ((s->flags & SEC_LINKER_CREATED) == 0)
8801 continue;
8802
8803 if (s == htab->brlt || s == htab->relbrlt)
8804 /* These haven't been allocated yet; don't strip. */
8805 continue;
8806 else if (s == htab->got
8807 || s == htab->plt
8808 || s == htab->iplt
8809 || s == htab->glink
8810 || s == htab->dynbss)
8811 {
8812 /* Strip this section if we don't need it; see the
8813 comment below. */
8814 }
8815 else if (CONST_STRNEQ (s->name, ".rela"))
8816 {
8817 if (s->size != 0)
8818 {
8819 if (s != htab->relplt)
8820 relocs = TRUE;
8821
8822 /* We use the reloc_count field as a counter if we need
8823 to copy relocs into the output file. */
8824 s->reloc_count = 0;
8825 }
8826 }
8827 else
8828 {
8829 /* It's not one of our sections, so don't allocate space. */
8830 continue;
8831 }
8832
8833 if (s->size == 0)
8834 {
8835 /* If we don't need this section, strip it from the
8836 output file. This is mostly to handle .rela.bss and
8837 .rela.plt. We must create both sections in
8838 create_dynamic_sections, because they must be created
8839 before the linker maps input sections to output
8840 sections. The linker does that before
8841 adjust_dynamic_symbol is called, and it is that
8842 function which decides whether anything needs to go
8843 into these sections. */
8844 s->flags |= SEC_EXCLUDE;
8845 continue;
8846 }
8847
8848 if ((s->flags & SEC_HAS_CONTENTS) == 0)
8849 continue;
8850
8851 /* Allocate memory for the section contents. We use bfd_zalloc
8852 here in case unused entries are not reclaimed before the
8853 section's contents are written out. This should not happen,
8854 but this way if it does we get a R_PPC64_NONE reloc in .rela
8855 sections instead of garbage.
8856 We also rely on the section contents being zero when writing
8857 the GOT. */
8858 s->contents = bfd_zalloc (dynobj, s->size);
8859 if (s->contents == NULL)
8860 return FALSE;
8861 }
8862
8863 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8864 {
8865 if (!is_ppc64_elf (ibfd))
8866 continue;
8867
8868 s = ppc64_elf_tdata (ibfd)->got;
8869 if (s != NULL && s != htab->got)
8870 {
8871 if (s->size == 0)
8872 s->flags |= SEC_EXCLUDE;
8873 else
8874 {
8875 s->contents = bfd_zalloc (ibfd, s->size);
8876 if (s->contents == NULL)
8877 return FALSE;
8878 }
8879 }
8880 s = ppc64_elf_tdata (ibfd)->relgot;
8881 if (s != NULL)
8882 {
8883 if (s->size == 0)
8884 s->flags |= SEC_EXCLUDE;
8885 else
8886 {
8887 s->contents = bfd_zalloc (ibfd, s->size);
8888 if (s->contents == NULL)
8889 return FALSE;
8890 relocs = TRUE;
8891 s->reloc_count = 0;
8892 }
8893 }
8894 }
8895
8896 if (htab->elf.dynamic_sections_created)
8897 {
8898 /* Add some entries to the .dynamic section. We fill in the
8899 values later, in ppc64_elf_finish_dynamic_sections, but we
8900 must add the entries now so that we get the correct size for
8901 the .dynamic section. The DT_DEBUG entry is filled in by the
8902 dynamic linker and used by the debugger. */
8903 #define add_dynamic_entry(TAG, VAL) \
8904 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
8905
8906 if (info->executable)
8907 {
8908 if (!add_dynamic_entry (DT_DEBUG, 0))
8909 return FALSE;
8910 }
8911
8912 if (htab->plt != NULL && htab->plt->size != 0)
8913 {
8914 if (!add_dynamic_entry (DT_PLTGOT, 0)
8915 || !add_dynamic_entry (DT_PLTRELSZ, 0)
8916 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
8917 || !add_dynamic_entry (DT_JMPREL, 0)
8918 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
8919 return FALSE;
8920 }
8921
8922 if (NO_OPD_RELOCS)
8923 {
8924 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
8925 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
8926 return FALSE;
8927 }
8928
8929 if (!htab->no_tls_get_addr_opt
8930 && htab->tls_get_addr_fd != NULL
8931 && htab->tls_get_addr_fd->elf.plt.plist != NULL
8932 && !add_dynamic_entry (DT_PPC64_TLSOPT, 0))
8933 return FALSE;
8934
8935 if (relocs)
8936 {
8937 if (!add_dynamic_entry (DT_RELA, 0)
8938 || !add_dynamic_entry (DT_RELASZ, 0)
8939 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
8940 return FALSE;
8941
8942 /* If any dynamic relocs apply to a read-only section,
8943 then we need a DT_TEXTREL entry. */
8944 if ((info->flags & DF_TEXTREL) == 0)
8945 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info);
8946
8947 if ((info->flags & DF_TEXTREL) != 0)
8948 {
8949 if (!add_dynamic_entry (DT_TEXTREL, 0))
8950 return FALSE;
8951 }
8952 }
8953 }
8954 #undef add_dynamic_entry
8955
8956 return TRUE;
8957 }
8958
8959 /* Determine the type of stub needed, if any, for a call. */
8960
8961 static inline enum ppc_stub_type
8962 ppc_type_of_stub (asection *input_sec,
8963 const Elf_Internal_Rela *rel,
8964 struct ppc_link_hash_entry **hash,
8965 struct plt_entry **plt_ent,
8966 bfd_vma destination)
8967 {
8968 struct ppc_link_hash_entry *h = *hash;
8969 bfd_vma location;
8970 bfd_vma branch_offset;
8971 bfd_vma max_branch_offset;
8972 enum elf_ppc64_reloc_type r_type;
8973
8974 if (h != NULL)
8975 {
8976 struct plt_entry *ent;
8977 struct ppc_link_hash_entry *fdh = h;
8978 if (h->oh != NULL
8979 && h->oh->is_func_descriptor)
8980 {
8981 fdh = ppc_follow_link (h->oh);
8982 *hash = fdh;
8983 }
8984
8985 for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next)
8986 if (ent->addend == rel->r_addend
8987 && ent->plt.offset != (bfd_vma) -1)
8988 {
8989 *plt_ent = ent;
8990 return ppc_stub_plt_call;
8991 }
8992
8993 /* Here, we know we don't have a plt entry. If we don't have a
8994 either a defined function descriptor or a defined entry symbol
8995 in a regular object file, then it is pointless trying to make
8996 any other type of stub. */
8997 if (!((fdh->elf.root.type == bfd_link_hash_defined
8998 || fdh->elf.root.type == bfd_link_hash_defweak)
8999 && fdh->elf.root.u.def.section->output_section != NULL)
9000 && !((h->elf.root.type == bfd_link_hash_defined
9001 || h->elf.root.type == bfd_link_hash_defweak)
9002 && h->elf.root.u.def.section->output_section != NULL))
9003 return ppc_stub_none;
9004 }
9005 else if (elf_local_got_ents (input_sec->owner) != NULL)
9006 {
9007 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (input_sec->owner);
9008 struct plt_entry **local_plt = (struct plt_entry **)
9009 elf_local_got_ents (input_sec->owner) + symtab_hdr->sh_info;
9010 unsigned long r_symndx = ELF64_R_SYM (rel->r_info);
9011
9012 if (local_plt[r_symndx] != NULL)
9013 {
9014 struct plt_entry *ent;
9015
9016 for (ent = local_plt[r_symndx]; ent != NULL; ent = ent->next)
9017 if (ent->addend == rel->r_addend
9018 && ent->plt.offset != (bfd_vma) -1)
9019 {
9020 *plt_ent = ent;
9021 return ppc_stub_plt_call;
9022 }
9023 }
9024 }
9025
9026 /* Determine where the call point is. */
9027 location = (input_sec->output_offset
9028 + input_sec->output_section->vma
9029 + rel->r_offset);
9030
9031 branch_offset = destination - location;
9032 r_type = ELF64_R_TYPE (rel->r_info);
9033
9034 /* Determine if a long branch stub is needed. */
9035 max_branch_offset = 1 << 25;
9036 if (r_type != R_PPC64_REL24)
9037 max_branch_offset = 1 << 15;
9038
9039 if (branch_offset + max_branch_offset >= 2 * max_branch_offset)
9040 /* We need a stub. Figure out whether a long_branch or plt_branch
9041 is needed later. */
9042 return ppc_stub_long_branch;
9043
9044 return ppc_stub_none;
9045 }
9046
9047 /* Build a .plt call stub. */
9048
9049 static inline bfd_byte *
9050 build_plt_stub (bfd *obfd, bfd_byte *p, int offset, Elf_Internal_Rela *r)
9051 {
9052 #define PPC_LO(v) ((v) & 0xffff)
9053 #define PPC_HI(v) (((v) >> 16) & 0xffff)
9054 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
9055
9056 if (PPC_HA (offset) != 0)
9057 {
9058 if (r != NULL)
9059 {
9060 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
9061 r[1].r_offset = r[0].r_offset + 8;
9062 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9063 r[1].r_addend = r[0].r_addend;
9064 if (PPC_HA (offset + 16) != PPC_HA (offset))
9065 {
9066 r[2].r_offset = r[1].r_offset + 4;
9067 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO);
9068 r[2].r_addend = r[0].r_addend;
9069 }
9070 else
9071 {
9072 r[2].r_offset = r[1].r_offset + 8;
9073 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9074 r[2].r_addend = r[0].r_addend + 8;
9075 r[3].r_offset = r[2].r_offset + 4;
9076 r[3].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9077 r[3].r_addend = r[0].r_addend + 16;
9078 }
9079 }
9080 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
9081 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
9082 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
9083 if (PPC_HA (offset + 16) != PPC_HA (offset))
9084 {
9085 bfd_put_32 (obfd, ADDI_R12_R12 | PPC_LO (offset), p), p += 4;
9086 offset = 0;
9087 }
9088 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
9089 bfd_put_32 (obfd, LD_R2_0R12 | PPC_LO (offset + 8), p), p += 4;
9090 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset + 16), p), p += 4;
9091 bfd_put_32 (obfd, BCTR, p), p += 4;
9092 }
9093 else
9094 {
9095 if (r != NULL)
9096 {
9097 r[0].r_offset += 4;
9098 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9099 if (PPC_HA (offset + 16) != PPC_HA (offset))
9100 {
9101 r[1].r_offset = r[0].r_offset + 4;
9102 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16);
9103 r[1].r_addend = r[0].r_addend;
9104 }
9105 else
9106 {
9107 r[1].r_offset = r[0].r_offset + 8;
9108 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9109 r[1].r_addend = r[0].r_addend + 16;
9110 r[2].r_offset = r[1].r_offset + 4;
9111 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9112 r[2].r_addend = r[0].r_addend + 8;
9113 }
9114 }
9115 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
9116 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset), p), p += 4;
9117 if (PPC_HA (offset + 16) != PPC_HA (offset))
9118 {
9119 bfd_put_32 (obfd, ADDI_R2_R2 | PPC_LO (offset), p), p += 4;
9120 offset = 0;
9121 }
9122 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
9123 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset + 16), p), p += 4;
9124 bfd_put_32 (obfd, LD_R2_0R2 | PPC_LO (offset + 8), p), p += 4;
9125 bfd_put_32 (obfd, BCTR, p), p += 4;
9126 }
9127 return p;
9128 }
9129
9130 /* Build a special .plt call stub for __tls_get_addr. */
9131
9132 #define LD_R11_0R3 0xe9630000
9133 #define LD_R12_0R3 0xe9830000
9134 #define MR_R0_R3 0x7c601b78
9135 #define CMPDI_R11_0 0x2c2b0000
9136 #define ADD_R3_R12_R13 0x7c6c6a14
9137 #define BEQLR 0x4d820020
9138 #define MR_R3_R0 0x7c030378
9139 #define MFLR_R11 0x7d6802a6
9140 #define STD_R11_0R1 0xf9610000
9141 #define BCTRL 0x4e800421
9142 #define LD_R11_0R1 0xe9610000
9143 #define LD_R2_0R1 0xe8410000
9144 #define MTLR_R11 0x7d6803a6
9145
9146 static inline bfd_byte *
9147 build_tls_get_addr_stub (bfd *obfd, bfd_byte *p, int offset,
9148 Elf_Internal_Rela *r)
9149 {
9150 bfd_put_32 (obfd, LD_R11_0R3 + 0, p), p += 4;
9151 bfd_put_32 (obfd, LD_R12_0R3 + 8, p), p += 4;
9152 bfd_put_32 (obfd, MR_R0_R3, p), p += 4;
9153 bfd_put_32 (obfd, CMPDI_R11_0, p), p += 4;
9154 bfd_put_32 (obfd, ADD_R3_R12_R13, p), p += 4;
9155 bfd_put_32 (obfd, BEQLR, p), p += 4;
9156 bfd_put_32 (obfd, MR_R3_R0, p), p += 4;
9157 bfd_put_32 (obfd, MFLR_R11, p), p += 4;
9158 bfd_put_32 (obfd, STD_R11_0R1 + 32, p), p += 4;
9159
9160 if (r != NULL)
9161 r[0].r_offset += 9 * 4;
9162 p = build_plt_stub (obfd, p, offset, r);
9163 bfd_put_32 (obfd, BCTRL, p - 4);
9164
9165 bfd_put_32 (obfd, LD_R11_0R1 + 32, p), p += 4;
9166 bfd_put_32 (obfd, LD_R2_0R1 + 40, p), p += 4;
9167 bfd_put_32 (obfd, MTLR_R11, p), p += 4;
9168 bfd_put_32 (obfd, BLR, p), p += 4;
9169
9170 return p;
9171 }
9172
9173 static Elf_Internal_Rela *
9174 get_relocs (asection *sec, int count)
9175 {
9176 Elf_Internal_Rela *relocs;
9177 struct bfd_elf_section_data *elfsec_data;
9178
9179 elfsec_data = elf_section_data (sec);
9180 relocs = elfsec_data->relocs;
9181 if (relocs == NULL)
9182 {
9183 bfd_size_type relsize;
9184 relsize = sec->reloc_count * sizeof (*relocs);
9185 relocs = bfd_alloc (sec->owner, relsize);
9186 if (relocs == NULL)
9187 return NULL;
9188 elfsec_data->relocs = relocs;
9189 elfsec_data->rel_hdr.sh_size = (sec->reloc_count
9190 * sizeof (Elf64_External_Rela));
9191 elfsec_data->rel_hdr.sh_entsize = sizeof (Elf64_External_Rela);
9192 sec->reloc_count = 0;
9193 }
9194 relocs += sec->reloc_count;
9195 sec->reloc_count += count;
9196 return relocs;
9197 }
9198
9199 static bfd_boolean
9200 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
9201 {
9202 struct ppc_stub_hash_entry *stub_entry;
9203 struct ppc_branch_hash_entry *br_entry;
9204 struct bfd_link_info *info;
9205 struct ppc_link_hash_table *htab;
9206 bfd_byte *loc;
9207 bfd_byte *p;
9208 bfd_vma dest, off;
9209 int size;
9210 Elf_Internal_Rela *r;
9211 asection *plt;
9212
9213 /* Massage our args to the form they really have. */
9214 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
9215 info = in_arg;
9216
9217 htab = ppc_hash_table (info);
9218 if (htab == NULL)
9219 return FALSE;
9220
9221 /* Make a note of the offset within the stubs for this entry. */
9222 stub_entry->stub_offset = stub_entry->stub_sec->size;
9223 loc = stub_entry->stub_sec->contents + stub_entry->stub_offset;
9224
9225 htab->stub_count[stub_entry->stub_type - 1] += 1;
9226 switch (stub_entry->stub_type)
9227 {
9228 case ppc_stub_long_branch:
9229 case ppc_stub_long_branch_r2off:
9230 /* Branches are relative. This is where we are going to. */
9231 off = dest = (stub_entry->target_value
9232 + stub_entry->target_section->output_offset
9233 + stub_entry->target_section->output_section->vma);
9234
9235 /* And this is where we are coming from. */
9236 off -= (stub_entry->stub_offset
9237 + stub_entry->stub_sec->output_offset
9238 + stub_entry->stub_sec->output_section->vma);
9239
9240 size = 4;
9241 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
9242 {
9243 bfd_vma r2off;
9244
9245 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
9246 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9247 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
9248 loc += 4;
9249 size = 12;
9250 if (PPC_HA (r2off) != 0)
9251 {
9252 size = 16;
9253 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
9254 loc += 4;
9255 }
9256 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
9257 loc += 4;
9258 off -= size - 4;
9259 }
9260 bfd_put_32 (htab->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
9261
9262 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
9263 {
9264 (*_bfd_error_handler) (_("long branch stub `%s' offset overflow"),
9265 stub_entry->root.string);
9266 htab->stub_error = TRUE;
9267 return FALSE;
9268 }
9269
9270 if (info->emitrelocations)
9271 {
9272 r = get_relocs (stub_entry->stub_sec, 1);
9273 if (r == NULL)
9274 return FALSE;
9275 r->r_offset = loc - stub_entry->stub_sec->contents;
9276 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
9277 r->r_addend = dest;
9278 if (stub_entry->h != NULL)
9279 {
9280 struct elf_link_hash_entry **hashes;
9281 unsigned long symndx;
9282 struct ppc_link_hash_entry *h;
9283
9284 hashes = elf_sym_hashes (htab->stub_bfd);
9285 if (hashes == NULL)
9286 {
9287 bfd_size_type hsize;
9288
9289 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
9290 hashes = bfd_zalloc (htab->stub_bfd, hsize);
9291 if (hashes == NULL)
9292 return FALSE;
9293 elf_sym_hashes (htab->stub_bfd) = hashes;
9294 htab->stub_globals = 1;
9295 }
9296 symndx = htab->stub_globals++;
9297 h = stub_entry->h;
9298 hashes[symndx] = &h->elf;
9299 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
9300 if (h->oh != NULL && h->oh->is_func)
9301 h = ppc_follow_link (h->oh);
9302 if (h->elf.root.u.def.section != stub_entry->target_section)
9303 /* H is an opd symbol. The addend must be zero. */
9304 r->r_addend = 0;
9305 else
9306 {
9307 off = (h->elf.root.u.def.value
9308 + h->elf.root.u.def.section->output_offset
9309 + h->elf.root.u.def.section->output_section->vma);
9310 r->r_addend -= off;
9311 }
9312 }
9313 }
9314 break;
9315
9316 case ppc_stub_plt_branch:
9317 case ppc_stub_plt_branch_r2off:
9318 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
9319 stub_entry->root.string + 9,
9320 FALSE, FALSE);
9321 if (br_entry == NULL)
9322 {
9323 (*_bfd_error_handler) (_("can't find branch stub `%s'"),
9324 stub_entry->root.string);
9325 htab->stub_error = TRUE;
9326 return FALSE;
9327 }
9328
9329 dest = (stub_entry->target_value
9330 + stub_entry->target_section->output_offset
9331 + stub_entry->target_section->output_section->vma);
9332
9333 bfd_put_64 (htab->brlt->owner, dest,
9334 htab->brlt->contents + br_entry->offset);
9335
9336 if (br_entry->iter == htab->stub_iteration)
9337 {
9338 br_entry->iter = 0;
9339
9340 if (htab->relbrlt != NULL)
9341 {
9342 /* Create a reloc for the branch lookup table entry. */
9343 Elf_Internal_Rela rela;
9344 bfd_byte *rl;
9345
9346 rela.r_offset = (br_entry->offset
9347 + htab->brlt->output_offset
9348 + htab->brlt->output_section->vma);
9349 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
9350 rela.r_addend = dest;
9351
9352 rl = htab->relbrlt->contents;
9353 rl += (htab->relbrlt->reloc_count++
9354 * sizeof (Elf64_External_Rela));
9355 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
9356 }
9357 else if (info->emitrelocations)
9358 {
9359 r = get_relocs (htab->brlt, 1);
9360 if (r == NULL)
9361 return FALSE;
9362 /* brlt, being SEC_LINKER_CREATED does not go through the
9363 normal reloc processing. Symbols and offsets are not
9364 translated from input file to output file form, so
9365 set up the offset per the output file. */
9366 r->r_offset = (br_entry->offset
9367 + htab->brlt->output_offset
9368 + htab->brlt->output_section->vma);
9369 r->r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
9370 r->r_addend = dest;
9371 }
9372 }
9373
9374 dest = (br_entry->offset
9375 + htab->brlt->output_offset
9376 + htab->brlt->output_section->vma);
9377
9378 off = (dest
9379 - elf_gp (htab->brlt->output_section->owner)
9380 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9381
9382 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
9383 {
9384 (*_bfd_error_handler)
9385 (_("linkage table error against `%s'"),
9386 stub_entry->root.string);
9387 bfd_set_error (bfd_error_bad_value);
9388 htab->stub_error = TRUE;
9389 return FALSE;
9390 }
9391
9392 if (info->emitrelocations)
9393 {
9394 r = get_relocs (stub_entry->stub_sec, 1 + (PPC_HA (off) != 0));
9395 if (r == NULL)
9396 return FALSE;
9397 r[0].r_offset = loc - stub_entry->stub_sec->contents;
9398 if (bfd_big_endian (info->output_bfd))
9399 r[0].r_offset += 2;
9400 if (stub_entry->stub_type == ppc_stub_plt_branch_r2off)
9401 r[0].r_offset += 4;
9402 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9403 r[0].r_addend = dest;
9404 if (PPC_HA (off) != 0)
9405 {
9406 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
9407 r[1].r_offset = r[0].r_offset + 4;
9408 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9409 r[1].r_addend = r[0].r_addend;
9410 }
9411 }
9412
9413 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
9414 {
9415 if (PPC_HA (off) != 0)
9416 {
9417 size = 16;
9418 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (off), loc);
9419 loc += 4;
9420 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (off), loc);
9421 }
9422 else
9423 {
9424 size = 12;
9425 bfd_put_32 (htab->stub_bfd, LD_R11_0R2 | PPC_LO (off), loc);
9426 }
9427 }
9428 else
9429 {
9430 bfd_vma r2off;
9431
9432 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
9433 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9434 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
9435 loc += 4;
9436 size = 20;
9437 if (PPC_HA (off) != 0)
9438 {
9439 size += 4;
9440 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (off), loc);
9441 loc += 4;
9442 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (off), loc);
9443 loc += 4;
9444 }
9445 else
9446 {
9447 bfd_put_32 (htab->stub_bfd, LD_R11_0R2 | PPC_LO (off), loc);
9448 loc += 4;
9449 }
9450
9451 if (PPC_HA (r2off) != 0)
9452 {
9453 size += 4;
9454 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
9455 loc += 4;
9456 }
9457 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
9458 }
9459 loc += 4;
9460 bfd_put_32 (htab->stub_bfd, MTCTR_R11, loc);
9461 loc += 4;
9462 bfd_put_32 (htab->stub_bfd, BCTR, loc);
9463 break;
9464
9465 case ppc_stub_plt_call:
9466 if (stub_entry->h != NULL
9467 && stub_entry->h->is_func_descriptor
9468 && stub_entry->h->oh != NULL)
9469 {
9470 struct ppc_link_hash_entry *fh = ppc_follow_link (stub_entry->h->oh);
9471
9472 /* If the old-ABI "dot-symbol" is undefined make it weak so
9473 we don't get a link error from RELOC_FOR_GLOBAL_SYMBOL.
9474 FIXME: We used to define the symbol on one of the call
9475 stubs instead, which is why we test symbol section id
9476 against htab->top_id in various places. Likely all
9477 these checks could now disappear. */
9478 if (fh->elf.root.type == bfd_link_hash_undefined)
9479 fh->elf.root.type = bfd_link_hash_undefweak;
9480 }
9481
9482 /* Now build the stub. */
9483 dest = stub_entry->plt_ent->plt.offset & ~1;
9484 if (dest >= (bfd_vma) -2)
9485 abort ();
9486
9487 plt = htab->plt;
9488 if (!htab->elf.dynamic_sections_created
9489 || stub_entry->h == NULL
9490 || stub_entry->h->elf.dynindx == -1)
9491 plt = htab->iplt;
9492
9493 dest += plt->output_offset + plt->output_section->vma;
9494
9495 if (stub_entry->h == NULL
9496 && (stub_entry->plt_ent->plt.offset & 1) == 0)
9497 {
9498 Elf_Internal_Rela rela;
9499 bfd_byte *rl;
9500
9501 rela.r_offset = dest;
9502 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
9503 rela.r_addend = (stub_entry->target_value
9504 + stub_entry->target_section->output_offset
9505 + stub_entry->target_section->output_section->vma);
9506
9507 rl = (htab->reliplt->contents
9508 + (htab->reliplt->reloc_count++
9509 * sizeof (Elf64_External_Rela)));
9510 bfd_elf64_swap_reloca_out (info->output_bfd, &rela, rl);
9511 stub_entry->plt_ent->plt.offset |= 1;
9512 }
9513
9514 off = (dest
9515 - elf_gp (plt->output_section->owner)
9516 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9517
9518 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
9519 {
9520 (*_bfd_error_handler)
9521 (_("linkage table error against `%s'"),
9522 stub_entry->h != NULL
9523 ? stub_entry->h->elf.root.root.string
9524 : "<local sym>");
9525 bfd_set_error (bfd_error_bad_value);
9526 htab->stub_error = TRUE;
9527 return FALSE;
9528 }
9529
9530 r = NULL;
9531 if (info->emitrelocations)
9532 {
9533 r = get_relocs (stub_entry->stub_sec,
9534 (2 + (PPC_HA (off) != 0)
9535 + (PPC_HA (off + 16) == PPC_HA (off))));
9536 if (r == NULL)
9537 return FALSE;
9538 r[0].r_offset = loc - stub_entry->stub_sec->contents;
9539 if (bfd_big_endian (info->output_bfd))
9540 r[0].r_offset += 2;
9541 r[0].r_addend = dest;
9542 }
9543 if (stub_entry->h != NULL
9544 && (stub_entry->h == htab->tls_get_addr_fd
9545 || stub_entry->h == htab->tls_get_addr)
9546 && !htab->no_tls_get_addr_opt)
9547 p = build_tls_get_addr_stub (htab->stub_bfd, loc, off, r);
9548 else
9549 p = build_plt_stub (htab->stub_bfd, loc, off, r);
9550 size = p - loc;
9551 break;
9552
9553 default:
9554 BFD_FAIL ();
9555 return FALSE;
9556 }
9557
9558 stub_entry->stub_sec->size += size;
9559
9560 if (htab->emit_stub_syms)
9561 {
9562 struct elf_link_hash_entry *h;
9563 size_t len1, len2;
9564 char *name;
9565 const char *const stub_str[] = { "long_branch",
9566 "long_branch_r2off",
9567 "plt_branch",
9568 "plt_branch_r2off",
9569 "plt_call" };
9570
9571 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
9572 len2 = strlen (stub_entry->root.string);
9573 name = bfd_malloc (len1 + len2 + 2);
9574 if (name == NULL)
9575 return FALSE;
9576 memcpy (name, stub_entry->root.string, 9);
9577 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
9578 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
9579 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
9580 if (h == NULL)
9581 return FALSE;
9582 if (h->root.type == bfd_link_hash_new)
9583 {
9584 h->root.type = bfd_link_hash_defined;
9585 h->root.u.def.section = stub_entry->stub_sec;
9586 h->root.u.def.value = stub_entry->stub_offset;
9587 h->ref_regular = 1;
9588 h->def_regular = 1;
9589 h->ref_regular_nonweak = 1;
9590 h->forced_local = 1;
9591 h->non_elf = 0;
9592 }
9593 }
9594
9595 return TRUE;
9596 }
9597
9598 /* As above, but don't actually build the stub. Just bump offset so
9599 we know stub section sizes, and select plt_branch stubs where
9600 long_branch stubs won't do. */
9601
9602 static bfd_boolean
9603 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
9604 {
9605 struct ppc_stub_hash_entry *stub_entry;
9606 struct bfd_link_info *info;
9607 struct ppc_link_hash_table *htab;
9608 bfd_vma off;
9609 int size;
9610
9611 /* Massage our args to the form they really have. */
9612 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
9613 info = in_arg;
9614
9615 htab = ppc_hash_table (info);
9616 if (htab == NULL)
9617 return FALSE;
9618
9619 if (stub_entry->stub_type == ppc_stub_plt_call)
9620 {
9621 asection *plt;
9622 off = stub_entry->plt_ent->plt.offset & ~(bfd_vma) 1;
9623 if (off >= (bfd_vma) -2)
9624 abort ();
9625 plt = htab->plt;
9626 if (!htab->elf.dynamic_sections_created
9627 || stub_entry->h == NULL
9628 || stub_entry->h->elf.dynindx == -1)
9629 plt = htab->iplt;
9630 off += (plt->output_offset
9631 + plt->output_section->vma
9632 - elf_gp (plt->output_section->owner)
9633 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9634
9635 size = PLT_CALL_STUB_SIZE;
9636 if (PPC_HA (off) == 0)
9637 size -= 4;
9638 if (PPC_HA (off + 16) != PPC_HA (off))
9639 size += 4;
9640 if (stub_entry->h != NULL
9641 && (stub_entry->h == htab->tls_get_addr_fd
9642 || stub_entry->h == htab->tls_get_addr)
9643 && !htab->no_tls_get_addr_opt)
9644 size += 13 * 4;
9645 if (info->emitrelocations)
9646 {
9647 stub_entry->stub_sec->reloc_count
9648 += 2 + (PPC_HA (off) != 0) + (PPC_HA (off + 16) == PPC_HA (off));
9649 stub_entry->stub_sec->flags |= SEC_RELOC;
9650 }
9651 }
9652 else
9653 {
9654 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
9655 variants. */
9656 bfd_vma r2off = 0;
9657
9658 off = (stub_entry->target_value
9659 + stub_entry->target_section->output_offset
9660 + stub_entry->target_section->output_section->vma);
9661 off -= (stub_entry->stub_sec->size
9662 + stub_entry->stub_sec->output_offset
9663 + stub_entry->stub_sec->output_section->vma);
9664
9665 /* Reset the stub type from the plt variant in case we now
9666 can reach with a shorter stub. */
9667 if (stub_entry->stub_type >= ppc_stub_plt_branch)
9668 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
9669
9670 size = 4;
9671 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
9672 {
9673 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
9674 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9675 size = 12;
9676 if (PPC_HA (r2off) != 0)
9677 size = 16;
9678 off -= size - 4;
9679 }
9680
9681 /* If the branch offset if too big, use a ppc_stub_plt_branch. */
9682 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
9683 {
9684 struct ppc_branch_hash_entry *br_entry;
9685
9686 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
9687 stub_entry->root.string + 9,
9688 TRUE, FALSE);
9689 if (br_entry == NULL)
9690 {
9691 (*_bfd_error_handler) (_("can't build branch stub `%s'"),
9692 stub_entry->root.string);
9693 htab->stub_error = TRUE;
9694 return FALSE;
9695 }
9696
9697 if (br_entry->iter != htab->stub_iteration)
9698 {
9699 br_entry->iter = htab->stub_iteration;
9700 br_entry->offset = htab->brlt->size;
9701 htab->brlt->size += 8;
9702
9703 if (htab->relbrlt != NULL)
9704 htab->relbrlt->size += sizeof (Elf64_External_Rela);
9705 else if (info->emitrelocations)
9706 {
9707 htab->brlt->reloc_count += 1;
9708 htab->brlt->flags |= SEC_RELOC;
9709 }
9710 }
9711
9712 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
9713 off = (br_entry->offset
9714 + htab->brlt->output_offset
9715 + htab->brlt->output_section->vma
9716 - elf_gp (htab->brlt->output_section->owner)
9717 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9718
9719 if (info->emitrelocations)
9720 {
9721 stub_entry->stub_sec->reloc_count += 1 + (PPC_HA (off) != 0);
9722 stub_entry->stub_sec->flags |= SEC_RELOC;
9723 }
9724
9725 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
9726 {
9727 size = 12;
9728 if (PPC_HA (off) != 0)
9729 size = 16;
9730 }
9731 else
9732 {
9733 size = 20;
9734 if (PPC_HA (off) != 0)
9735 size += 4;
9736
9737 if (PPC_HA (r2off) != 0)
9738 size += 4;
9739 }
9740 }
9741 else if (info->emitrelocations)
9742 {
9743 stub_entry->stub_sec->reloc_count += 1;
9744 stub_entry->stub_sec->flags |= SEC_RELOC;
9745 }
9746 }
9747
9748 stub_entry->stub_sec->size += size;
9749 return TRUE;
9750 }
9751
9752 /* Set up various things so that we can make a list of input sections
9753 for each output section included in the link. Returns -1 on error,
9754 0 when no stubs will be needed, and 1 on success. */
9755
9756 int
9757 ppc64_elf_setup_section_lists
9758 (struct bfd_link_info *info,
9759 asection *(*add_stub_section) (const char *, asection *),
9760 void (*layout_sections_again) (void))
9761 {
9762 bfd *input_bfd;
9763 int top_id, top_index, id;
9764 asection *section;
9765 asection **input_list;
9766 bfd_size_type amt;
9767 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9768
9769 if (htab == NULL)
9770 return -1;
9771 /* Stash our params away. */
9772 htab->add_stub_section = add_stub_section;
9773 htab->layout_sections_again = layout_sections_again;
9774
9775 if (htab->brlt == NULL)
9776 return 0;
9777
9778 /* Find the top input section id. */
9779 for (input_bfd = info->input_bfds, top_id = 3;
9780 input_bfd != NULL;
9781 input_bfd = input_bfd->link_next)
9782 {
9783 for (section = input_bfd->sections;
9784 section != NULL;
9785 section = section->next)
9786 {
9787 if (top_id < section->id)
9788 top_id = section->id;
9789 }
9790 }
9791
9792 htab->top_id = top_id;
9793 amt = sizeof (struct map_stub) * (top_id + 1);
9794 htab->stub_group = bfd_zmalloc (amt);
9795 if (htab->stub_group == NULL)
9796 return -1;
9797
9798 /* Set toc_off for com, und, abs and ind sections. */
9799 for (id = 0; id < 3; id++)
9800 htab->stub_group[id].toc_off = TOC_BASE_OFF;
9801
9802 /* We can't use output_bfd->section_count here to find the top output
9803 section index as some sections may have been removed, and
9804 strip_excluded_output_sections doesn't renumber the indices. */
9805 for (section = info->output_bfd->sections, top_index = 0;
9806 section != NULL;
9807 section = section->next)
9808 {
9809 if (top_index < section->index)
9810 top_index = section->index;
9811 }
9812
9813 htab->top_index = top_index;
9814 amt = sizeof (asection *) * (top_index + 1);
9815 input_list = bfd_zmalloc (amt);
9816 htab->input_list = input_list;
9817 if (input_list == NULL)
9818 return -1;
9819
9820 return 1;
9821 }
9822
9823 /* Set up for first pass at multitoc partitioning. */
9824
9825 void
9826 ppc64_elf_start_multitoc_partition (struct bfd_link_info *info)
9827 {
9828 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9829
9830 elf_gp (info->output_bfd) = ppc64_elf_toc (info->output_bfd);
9831 htab->toc_curr = elf_gp (info->output_bfd);
9832 htab->toc_bfd = NULL;
9833 htab->toc_first_sec = NULL;
9834 }
9835
9836 /* The linker repeatedly calls this function for each TOC input section
9837 and linker generated GOT section. Group input bfds such that the toc
9838 within a group is less than 64k in size. */
9839
9840 bfd_boolean
9841 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
9842 {
9843 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9844 bfd_vma addr, off, limit;
9845
9846 if (htab == NULL)
9847 return FALSE;
9848
9849 if (!htab->second_toc_pass)
9850 {
9851 /* Keep track of the first .toc or .got section for this input bfd. */
9852 if (htab->toc_bfd != isec->owner)
9853 {
9854 htab->toc_bfd = isec->owner;
9855 htab->toc_first_sec = isec;
9856 }
9857
9858 addr = isec->output_offset + isec->output_section->vma;
9859 off = addr - htab->toc_curr;
9860 limit = 0x80008000;
9861 if (ppc64_elf_tdata (isec->owner)->has_small_toc_reloc)
9862 limit = 0x10000;
9863 if (off + isec->size > limit)
9864 {
9865 addr = (htab->toc_first_sec->output_offset
9866 + htab->toc_first_sec->output_section->vma);
9867 htab->toc_curr = addr;
9868 }
9869
9870 /* toc_curr is the base address of this toc group. Set elf_gp
9871 for the input section to be the offset relative to the
9872 output toc base plus 0x8000. Making the input elf_gp an
9873 offset allows us to move the toc as a whole without
9874 recalculating input elf_gp. */
9875 off = htab->toc_curr - elf_gp (isec->output_section->owner);
9876 off += TOC_BASE_OFF;
9877
9878 /* Die if someone uses a linker script that doesn't keep input
9879 file .toc and .got together. */
9880 if (elf_gp (isec->owner) != 0
9881 && elf_gp (isec->owner) != off)
9882 return FALSE;
9883
9884 elf_gp (isec->owner) = off;
9885 return TRUE;
9886 }
9887
9888 /* During the second pass toc_first_sec points to the start of
9889 a toc group, and toc_curr is used to track the old elf_gp.
9890 We use toc_bfd to ensure we only look at each bfd once. */
9891 if (htab->toc_bfd == isec->owner)
9892 return TRUE;
9893 htab->toc_bfd = isec->owner;
9894
9895 if (htab->toc_first_sec == NULL
9896 || htab->toc_curr != elf_gp (isec->owner))
9897 {
9898 htab->toc_curr = elf_gp (isec->owner);
9899 htab->toc_first_sec = isec;
9900 }
9901 addr = (htab->toc_first_sec->output_offset
9902 + htab->toc_first_sec->output_section->vma);
9903 off = addr - elf_gp (isec->output_section->owner) + TOC_BASE_OFF;
9904 elf_gp (isec->owner) = off;
9905
9906 return TRUE;
9907 }
9908
9909 /* Called via elf_link_hash_traverse to merge GOT entries for global
9910 symbol H. */
9911
9912 static bfd_boolean
9913 merge_global_got (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
9914 {
9915 if (h->root.type == bfd_link_hash_indirect)
9916 return TRUE;
9917
9918 if (h->root.type == bfd_link_hash_warning)
9919 h = (struct elf_link_hash_entry *) h->root.u.i.link;
9920
9921 merge_got_entries (&h->got.glist);
9922
9923 return TRUE;
9924 }
9925
9926 /* Called via elf_link_hash_traverse to allocate GOT entries for global
9927 symbol H. */
9928
9929 static bfd_boolean
9930 reallocate_got (struct elf_link_hash_entry *h, void *inf)
9931 {
9932 struct got_entry *gent;
9933
9934 if (h->root.type == bfd_link_hash_indirect)
9935 return TRUE;
9936
9937 if (h->root.type == bfd_link_hash_warning)
9938 h = (struct elf_link_hash_entry *) h->root.u.i.link;
9939
9940 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9941 if (!gent->is_indirect)
9942 allocate_got (h, (struct bfd_link_info *) inf, gent);
9943 return TRUE;
9944 }
9945
9946 /* Called on the first multitoc pass after the last call to
9947 ppc64_elf_next_toc_section. This function removes duplicate GOT
9948 entries. */
9949
9950 bfd_boolean
9951 ppc64_elf_layout_multitoc (struct bfd_link_info *info)
9952 {
9953 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9954 struct bfd *ibfd, *ibfd2;
9955 bfd_boolean done_something;
9956
9957 htab->multi_toc_needed = htab->toc_curr != elf_gp (info->output_bfd);
9958
9959 if (!htab->do_multi_toc)
9960 return FALSE;
9961
9962 /* Merge global sym got entries within a toc group. */
9963 elf_link_hash_traverse (&htab->elf, merge_global_got, info);
9964
9965 /* And tlsld_got. */
9966 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
9967 {
9968 struct got_entry *ent, *ent2;
9969
9970 if (!is_ppc64_elf (ibfd))
9971 continue;
9972
9973 ent = ppc64_tlsld_got (ibfd);
9974 if (!ent->is_indirect
9975 && ent->got.offset != (bfd_vma) -1)
9976 {
9977 for (ibfd2 = ibfd->link_next; ibfd2 != NULL; ibfd2 = ibfd2->link_next)
9978 {
9979 if (!is_ppc64_elf (ibfd2))
9980 continue;
9981
9982 ent2 = ppc64_tlsld_got (ibfd2);
9983 if (!ent2->is_indirect
9984 && ent2->got.offset != (bfd_vma) -1
9985 && elf_gp (ibfd2) == elf_gp (ibfd))
9986 {
9987 ent2->is_indirect = TRUE;
9988 ent2->got.ent = ent;
9989 }
9990 }
9991 }
9992 }
9993
9994 /* Zap sizes of got sections. */
9995 htab->reliplt->rawsize = htab->reliplt->size;
9996 htab->reliplt->size -= htab->got_reli_size;
9997 htab->got_reli_size = 0;
9998
9999 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10000 {
10001 asection *got, *relgot;
10002
10003 if (!is_ppc64_elf (ibfd))
10004 continue;
10005
10006 got = ppc64_elf_tdata (ibfd)->got;
10007 if (got != NULL)
10008 {
10009 got->rawsize = got->size;
10010 got->size = 0;
10011 relgot = ppc64_elf_tdata (ibfd)->relgot;
10012 relgot->rawsize = relgot->size;
10013 relgot->size = 0;
10014 }
10015 }
10016
10017 /* Now reallocate the got, local syms first. We don't need to
10018 allocate section contents again since we never increase size. */
10019 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10020 {
10021 struct got_entry **lgot_ents;
10022 struct got_entry **end_lgot_ents;
10023 struct plt_entry **local_plt;
10024 struct plt_entry **end_local_plt;
10025 unsigned char *lgot_masks;
10026 bfd_size_type locsymcount;
10027 Elf_Internal_Shdr *symtab_hdr;
10028 asection *s, *srel;
10029
10030 if (!is_ppc64_elf (ibfd))
10031 continue;
10032
10033 lgot_ents = elf_local_got_ents (ibfd);
10034 if (!lgot_ents)
10035 continue;
10036
10037 symtab_hdr = &elf_symtab_hdr (ibfd);
10038 locsymcount = symtab_hdr->sh_info;
10039 end_lgot_ents = lgot_ents + locsymcount;
10040 local_plt = (struct plt_entry **) end_lgot_ents;
10041 end_local_plt = local_plt + locsymcount;
10042 lgot_masks = (unsigned char *) end_local_plt;
10043 s = ppc64_elf_tdata (ibfd)->got;
10044 srel = ppc64_elf_tdata (ibfd)->relgot;
10045 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
10046 {
10047 struct got_entry *ent;
10048
10049 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
10050 {
10051 unsigned int num = 1;
10052 ent->got.offset = s->size;
10053 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
10054 num = 2;
10055 s->size += num * 8;
10056 if (info->shared)
10057 srel->size += num * sizeof (Elf64_External_Rela);
10058 else if ((*lgot_masks & PLT_IFUNC) != 0)
10059 {
10060 htab->reliplt->size
10061 += num * sizeof (Elf64_External_Rela);
10062 htab->got_reli_size
10063 += num * sizeof (Elf64_External_Rela);
10064 }
10065 }
10066 }
10067 }
10068
10069 elf_link_hash_traverse (&htab->elf, reallocate_got, info);
10070
10071 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10072 {
10073 struct got_entry *ent;
10074
10075 if (!is_ppc64_elf (ibfd))
10076 continue;
10077
10078 ent = ppc64_tlsld_got (ibfd);
10079 if (!ent->is_indirect
10080 && ent->got.offset != (bfd_vma) -1)
10081 {
10082 asection *s = ppc64_elf_tdata (ibfd)->got;
10083 ent->got.offset = s->size;
10084 s->size += 16;
10085 if (info->shared)
10086 {
10087 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
10088 srel->size += sizeof (Elf64_External_Rela);
10089 }
10090 }
10091 }
10092
10093 done_something = htab->reliplt->rawsize != htab->reliplt->size;
10094 if (!done_something)
10095 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10096 {
10097 asection *got;
10098
10099 if (!is_ppc64_elf (ibfd))
10100 continue;
10101
10102 got = ppc64_elf_tdata (ibfd)->got;
10103 if (got != NULL)
10104 {
10105 done_something = got->rawsize != got->size;
10106 if (done_something)
10107 break;
10108 }
10109 }
10110
10111 if (done_something)
10112 (*htab->layout_sections_again) ();
10113
10114 /* Set up for second pass over toc sections to recalculate elf_gp
10115 on input sections. */
10116 htab->toc_bfd = NULL;
10117 htab->toc_first_sec = NULL;
10118 htab->second_toc_pass = TRUE;
10119 return done_something;
10120 }
10121
10122 /* Called after second pass of multitoc partitioning. */
10123
10124 void
10125 ppc64_elf_finish_multitoc_partition (struct bfd_link_info *info)
10126 {
10127 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10128
10129 /* After the second pass, toc_curr tracks the TOC offset used
10130 for code sections below in ppc64_elf_next_input_section. */
10131 htab->toc_curr = TOC_BASE_OFF;
10132 }
10133
10134 /* No toc references were found in ISEC. If the code in ISEC makes no
10135 calls, then there's no need to use toc adjusting stubs when branching
10136 into ISEC. Actually, indirect calls from ISEC are OK as they will
10137 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
10138 needed, and 2 if a cyclical call-graph was found but no other reason
10139 for a stub was detected. If called from the top level, a return of
10140 2 means the same as a return of 0. */
10141
10142 static int
10143 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
10144 {
10145 int ret;
10146
10147 /* Mark this section as checked. */
10148 isec->call_check_done = 1;
10149
10150 /* We know none of our code bearing sections will need toc stubs. */
10151 if ((isec->flags & SEC_LINKER_CREATED) != 0)
10152 return 0;
10153
10154 if (isec->size == 0)
10155 return 0;
10156
10157 if (isec->output_section == NULL)
10158 return 0;
10159
10160 ret = 0;
10161 if (isec->reloc_count != 0)
10162 {
10163 Elf_Internal_Rela *relstart, *rel;
10164 Elf_Internal_Sym *local_syms;
10165 struct ppc_link_hash_table *htab;
10166
10167 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
10168 info->keep_memory);
10169 if (relstart == NULL)
10170 return -1;
10171
10172 /* Look for branches to outside of this section. */
10173 local_syms = NULL;
10174 htab = ppc_hash_table (info);
10175 if (htab == NULL)
10176 return -1;
10177
10178 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
10179 {
10180 enum elf_ppc64_reloc_type r_type;
10181 unsigned long r_symndx;
10182 struct elf_link_hash_entry *h;
10183 struct ppc_link_hash_entry *eh;
10184 Elf_Internal_Sym *sym;
10185 asection *sym_sec;
10186 struct _opd_sec_data *opd;
10187 bfd_vma sym_value;
10188 bfd_vma dest;
10189
10190 r_type = ELF64_R_TYPE (rel->r_info);
10191 if (r_type != R_PPC64_REL24
10192 && r_type != R_PPC64_REL14
10193 && r_type != R_PPC64_REL14_BRTAKEN
10194 && r_type != R_PPC64_REL14_BRNTAKEN)
10195 continue;
10196
10197 r_symndx = ELF64_R_SYM (rel->r_info);
10198 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
10199 isec->owner))
10200 {
10201 ret = -1;
10202 break;
10203 }
10204
10205 /* Calls to dynamic lib functions go through a plt call stub
10206 that uses r2. */
10207 eh = (struct ppc_link_hash_entry *) h;
10208 if (eh != NULL
10209 && (eh->elf.plt.plist != NULL
10210 || (eh->oh != NULL
10211 && ppc_follow_link (eh->oh)->elf.plt.plist != NULL)))
10212 {
10213 ret = 1;
10214 break;
10215 }
10216
10217 if (sym_sec == NULL)
10218 /* Ignore other undefined symbols. */
10219 continue;
10220
10221 /* Assume branches to other sections not included in the
10222 link need stubs too, to cover -R and absolute syms. */
10223 if (sym_sec->output_section == NULL)
10224 {
10225 ret = 1;
10226 break;
10227 }
10228
10229 if (h == NULL)
10230 sym_value = sym->st_value;
10231 else
10232 {
10233 if (h->root.type != bfd_link_hash_defined
10234 && h->root.type != bfd_link_hash_defweak)
10235 abort ();
10236 sym_value = h->root.u.def.value;
10237 }
10238 sym_value += rel->r_addend;
10239
10240 /* If this branch reloc uses an opd sym, find the code section. */
10241 opd = get_opd_info (sym_sec);
10242 if (opd != NULL)
10243 {
10244 if (h == NULL && opd->adjust != NULL)
10245 {
10246 long adjust;
10247
10248 adjust = opd->adjust[sym->st_value / 8];
10249 if (adjust == -1)
10250 /* Assume deleted functions won't ever be called. */
10251 continue;
10252 sym_value += adjust;
10253 }
10254
10255 dest = opd_entry_value (sym_sec, sym_value, &sym_sec, NULL);
10256 if (dest == (bfd_vma) -1)
10257 continue;
10258 }
10259 else
10260 dest = (sym_value
10261 + sym_sec->output_offset
10262 + sym_sec->output_section->vma);
10263
10264 /* Ignore branch to self. */
10265 if (sym_sec == isec)
10266 continue;
10267
10268 /* If the called function uses the toc, we need a stub. */
10269 if (sym_sec->has_toc_reloc
10270 || sym_sec->makes_toc_func_call)
10271 {
10272 ret = 1;
10273 break;
10274 }
10275
10276 /* Assume any branch that needs a long branch stub might in fact
10277 need a plt_branch stub. A plt_branch stub uses r2. */
10278 else if (dest - (isec->output_offset
10279 + isec->output_section->vma
10280 + rel->r_offset) + (1 << 25) >= (2 << 25))
10281 {
10282 ret = 1;
10283 break;
10284 }
10285
10286 /* If calling back to a section in the process of being
10287 tested, we can't say for sure that no toc adjusting stubs
10288 are needed, so don't return zero. */
10289 else if (sym_sec->call_check_in_progress)
10290 ret = 2;
10291
10292 /* Branches to another section that itself doesn't have any TOC
10293 references are OK. Recursively call ourselves to check. */
10294 else if (!sym_sec->call_check_done)
10295 {
10296 int recur;
10297
10298 /* Mark current section as indeterminate, so that other
10299 sections that call back to current won't be marked as
10300 known. */
10301 isec->call_check_in_progress = 1;
10302 recur = toc_adjusting_stub_needed (info, sym_sec);
10303 isec->call_check_in_progress = 0;
10304
10305 if (recur != 0)
10306 {
10307 ret = recur;
10308 if (recur != 2)
10309 break;
10310 }
10311 }
10312 }
10313
10314 if (local_syms != NULL
10315 && (elf_symtab_hdr (isec->owner).contents
10316 != (unsigned char *) local_syms))
10317 free (local_syms);
10318 if (elf_section_data (isec)->relocs != relstart)
10319 free (relstart);
10320 }
10321
10322 if ((ret & 1) == 0
10323 && isec->map_head.s != NULL
10324 && (strcmp (isec->output_section->name, ".init") == 0
10325 || strcmp (isec->output_section->name, ".fini") == 0))
10326 {
10327 if (isec->map_head.s->has_toc_reloc
10328 || isec->map_head.s->makes_toc_func_call)
10329 ret = 1;
10330 else if (!isec->map_head.s->call_check_done)
10331 {
10332 int recur;
10333 isec->call_check_in_progress = 1;
10334 recur = toc_adjusting_stub_needed (info, isec->map_head.s);
10335 isec->call_check_in_progress = 0;
10336 if (recur != 0)
10337 ret = recur;
10338 }
10339 }
10340
10341 if (ret == 1)
10342 isec->makes_toc_func_call = 1;
10343
10344 return ret;
10345 }
10346
10347 /* The linker repeatedly calls this function for each input section,
10348 in the order that input sections are linked into output sections.
10349 Build lists of input sections to determine groupings between which
10350 we may insert linker stubs. */
10351
10352 bfd_boolean
10353 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
10354 {
10355 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10356
10357 if (htab == NULL)
10358 return FALSE;
10359
10360 if ((isec->output_section->flags & SEC_CODE) != 0
10361 && isec->output_section->index <= htab->top_index)
10362 {
10363 asection **list = htab->input_list + isec->output_section->index;
10364 /* Steal the link_sec pointer for our list. */
10365 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
10366 /* This happens to make the list in reverse order,
10367 which is what we want. */
10368 PREV_SEC (isec) = *list;
10369 *list = isec;
10370 }
10371
10372 if (htab->multi_toc_needed)
10373 {
10374 /* If a code section has a function that uses the TOC then we need
10375 to use the right TOC (obviously). Also, make sure that .opd gets
10376 the correct TOC value for R_PPC64_TOC relocs that don't have or
10377 can't find their function symbol (shouldn't ever happen now).
10378 Also specially treat .fixup for the linux kernel. .fixup
10379 contains branches, but only back to the function that hit an
10380 exception. */
10381 if (isec->has_toc_reloc
10382 || (isec->flags & SEC_CODE) == 0
10383 || strcmp (isec->name, ".fixup") == 0)
10384 {
10385 if (elf_gp (isec->owner) != 0)
10386 htab->toc_curr = elf_gp (isec->owner);
10387 }
10388 else if (!isec->call_check_done
10389 && toc_adjusting_stub_needed (info, isec) < 0)
10390 return FALSE;
10391 }
10392
10393 /* Functions that don't use the TOC can belong in any TOC group.
10394 Use the last TOC base. This happens to make _init and _fini
10395 pasting work, because the fragments generally don't use the TOC. */
10396 htab->stub_group[isec->id].toc_off = htab->toc_curr;
10397 return TRUE;
10398 }
10399
10400 /* Check that all .init and .fini sections use the same toc, if they
10401 have toc relocs. */
10402
10403 static bfd_boolean
10404 check_pasted_section (struct bfd_link_info *info, const char *name)
10405 {
10406 asection *o = bfd_get_section_by_name (info->output_bfd, name);
10407
10408 if (o != NULL)
10409 {
10410 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10411 bfd_vma toc_off = 0;
10412 asection *i;
10413
10414 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
10415 if (i->has_toc_reloc)
10416 {
10417 if (toc_off == 0)
10418 toc_off = htab->stub_group[i->id].toc_off;
10419 else if (toc_off != htab->stub_group[i->id].toc_off)
10420 return FALSE;
10421 }
10422 /* Make sure the whole pasted function uses the same toc offset. */
10423 if (toc_off != 0)
10424 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
10425 htab->stub_group[i->id].toc_off = toc_off;
10426 }
10427 return TRUE;
10428 }
10429
10430 bfd_boolean
10431 ppc64_elf_check_init_fini (struct bfd_link_info *info)
10432 {
10433 return (check_pasted_section (info, ".init")
10434 & check_pasted_section (info, ".fini"));
10435 }
10436
10437 /* See whether we can group stub sections together. Grouping stub
10438 sections may result in fewer stubs. More importantly, we need to
10439 put all .init* and .fini* stubs at the beginning of the .init or
10440 .fini output sections respectively, because glibc splits the
10441 _init and _fini functions into multiple parts. Putting a stub in
10442 the middle of a function is not a good idea. */
10443
10444 static void
10445 group_sections (struct ppc_link_hash_table *htab,
10446 bfd_size_type stub_group_size,
10447 bfd_boolean stubs_always_before_branch)
10448 {
10449 asection **list;
10450 bfd_size_type stub14_group_size;
10451 bfd_boolean suppress_size_errors;
10452
10453 suppress_size_errors = FALSE;
10454 stub14_group_size = stub_group_size;
10455 if (stub_group_size == 1)
10456 {
10457 /* Default values. */
10458 if (stubs_always_before_branch)
10459 {
10460 stub_group_size = 0x1e00000;
10461 stub14_group_size = 0x7800;
10462 }
10463 else
10464 {
10465 stub_group_size = 0x1c00000;
10466 stub14_group_size = 0x7000;
10467 }
10468 suppress_size_errors = TRUE;
10469 }
10470
10471 list = htab->input_list + htab->top_index;
10472 do
10473 {
10474 asection *tail = *list;
10475 while (tail != NULL)
10476 {
10477 asection *curr;
10478 asection *prev;
10479 bfd_size_type total;
10480 bfd_boolean big_sec;
10481 bfd_vma curr_toc;
10482
10483 curr = tail;
10484 total = tail->size;
10485 big_sec = total > (ppc64_elf_section_data (tail)->has_14bit_branch
10486 ? stub14_group_size : stub_group_size);
10487 if (big_sec && !suppress_size_errors)
10488 (*_bfd_error_handler) (_("%B section %A exceeds stub group size"),
10489 tail->owner, tail);
10490 curr_toc = htab->stub_group[tail->id].toc_off;
10491
10492 while ((prev = PREV_SEC (curr)) != NULL
10493 && ((total += curr->output_offset - prev->output_offset)
10494 < (ppc64_elf_section_data (prev)->has_14bit_branch
10495 ? stub14_group_size : stub_group_size))
10496 && htab->stub_group[prev->id].toc_off == curr_toc)
10497 curr = prev;
10498
10499 /* OK, the size from the start of CURR to the end is less
10500 than stub_group_size and thus can be handled by one stub
10501 section. (or the tail section is itself larger than
10502 stub_group_size, in which case we may be toast.) We
10503 should really be keeping track of the total size of stubs
10504 added here, as stubs contribute to the final output
10505 section size. That's a little tricky, and this way will
10506 only break if stubs added make the total size more than
10507 2^25, ie. for the default stub_group_size, if stubs total
10508 more than 2097152 bytes, or nearly 75000 plt call stubs. */
10509 do
10510 {
10511 prev = PREV_SEC (tail);
10512 /* Set up this stub group. */
10513 htab->stub_group[tail->id].link_sec = curr;
10514 }
10515 while (tail != curr && (tail = prev) != NULL);
10516
10517 /* But wait, there's more! Input sections up to stub_group_size
10518 bytes before the stub section can be handled by it too.
10519 Don't do this if we have a really large section after the
10520 stubs, as adding more stubs increases the chance that
10521 branches may not reach into the stub section. */
10522 if (!stubs_always_before_branch && !big_sec)
10523 {
10524 total = 0;
10525 while (prev != NULL
10526 && ((total += tail->output_offset - prev->output_offset)
10527 < (ppc64_elf_section_data (prev)->has_14bit_branch
10528 ? stub14_group_size : stub_group_size))
10529 && htab->stub_group[prev->id].toc_off == curr_toc)
10530 {
10531 tail = prev;
10532 prev = PREV_SEC (tail);
10533 htab->stub_group[tail->id].link_sec = curr;
10534 }
10535 }
10536 tail = prev;
10537 }
10538 }
10539 while (list-- != htab->input_list);
10540 free (htab->input_list);
10541 #undef PREV_SEC
10542 }
10543
10544 /* Determine and set the size of the stub section for a final link.
10545
10546 The basic idea here is to examine all the relocations looking for
10547 PC-relative calls to a target that is unreachable with a "bl"
10548 instruction. */
10549
10550 bfd_boolean
10551 ppc64_elf_size_stubs (struct bfd_link_info *info, bfd_signed_vma group_size)
10552 {
10553 bfd_size_type stub_group_size;
10554 bfd_boolean stubs_always_before_branch;
10555 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10556
10557 if (htab == NULL)
10558 return FALSE;
10559
10560 stubs_always_before_branch = group_size < 0;
10561 if (group_size < 0)
10562 stub_group_size = -group_size;
10563 else
10564 stub_group_size = group_size;
10565
10566 group_sections (htab, stub_group_size, stubs_always_before_branch);
10567
10568 while (1)
10569 {
10570 bfd *input_bfd;
10571 unsigned int bfd_indx;
10572 asection *stub_sec;
10573
10574 htab->stub_iteration += 1;
10575
10576 for (input_bfd = info->input_bfds, bfd_indx = 0;
10577 input_bfd != NULL;
10578 input_bfd = input_bfd->link_next, bfd_indx++)
10579 {
10580 Elf_Internal_Shdr *symtab_hdr;
10581 asection *section;
10582 Elf_Internal_Sym *local_syms = NULL;
10583
10584 if (!is_ppc64_elf (input_bfd))
10585 continue;
10586
10587 /* We'll need the symbol table in a second. */
10588 symtab_hdr = &elf_symtab_hdr (input_bfd);
10589 if (symtab_hdr->sh_info == 0)
10590 continue;
10591
10592 /* Walk over each section attached to the input bfd. */
10593 for (section = input_bfd->sections;
10594 section != NULL;
10595 section = section->next)
10596 {
10597 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
10598
10599 /* If there aren't any relocs, then there's nothing more
10600 to do. */
10601 if ((section->flags & SEC_RELOC) == 0
10602 || (section->flags & SEC_ALLOC) == 0
10603 || (section->flags & SEC_LOAD) == 0
10604 || (section->flags & SEC_CODE) == 0
10605 || section->reloc_count == 0)
10606 continue;
10607
10608 /* If this section is a link-once section that will be
10609 discarded, then don't create any stubs. */
10610 if (section->output_section == NULL
10611 || section->output_section->owner != info->output_bfd)
10612 continue;
10613
10614 /* Get the relocs. */
10615 internal_relocs
10616 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
10617 info->keep_memory);
10618 if (internal_relocs == NULL)
10619 goto error_ret_free_local;
10620
10621 /* Now examine each relocation. */
10622 irela = internal_relocs;
10623 irelaend = irela + section->reloc_count;
10624 for (; irela < irelaend; irela++)
10625 {
10626 enum elf_ppc64_reloc_type r_type;
10627 unsigned int r_indx;
10628 enum ppc_stub_type stub_type;
10629 struct ppc_stub_hash_entry *stub_entry;
10630 asection *sym_sec, *code_sec;
10631 bfd_vma sym_value, code_value;
10632 bfd_vma destination;
10633 bfd_boolean ok_dest;
10634 struct ppc_link_hash_entry *hash;
10635 struct ppc_link_hash_entry *fdh;
10636 struct elf_link_hash_entry *h;
10637 Elf_Internal_Sym *sym;
10638 char *stub_name;
10639 const asection *id_sec;
10640 struct _opd_sec_data *opd;
10641 struct plt_entry *plt_ent;
10642
10643 r_type = ELF64_R_TYPE (irela->r_info);
10644 r_indx = ELF64_R_SYM (irela->r_info);
10645
10646 if (r_type >= R_PPC64_max)
10647 {
10648 bfd_set_error (bfd_error_bad_value);
10649 goto error_ret_free_internal;
10650 }
10651
10652 /* Only look for stubs on branch instructions. */
10653 if (r_type != R_PPC64_REL24
10654 && r_type != R_PPC64_REL14
10655 && r_type != R_PPC64_REL14_BRTAKEN
10656 && r_type != R_PPC64_REL14_BRNTAKEN)
10657 continue;
10658
10659 /* Now determine the call target, its name, value,
10660 section. */
10661 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
10662 r_indx, input_bfd))
10663 goto error_ret_free_internal;
10664 hash = (struct ppc_link_hash_entry *) h;
10665
10666 ok_dest = FALSE;
10667 fdh = NULL;
10668 sym_value = 0;
10669 if (hash == NULL)
10670 {
10671 sym_value = sym->st_value;
10672 ok_dest = TRUE;
10673 }
10674 else if (hash->elf.root.type == bfd_link_hash_defined
10675 || hash->elf.root.type == bfd_link_hash_defweak)
10676 {
10677 sym_value = hash->elf.root.u.def.value;
10678 if (sym_sec->output_section != NULL)
10679 ok_dest = TRUE;
10680 }
10681 else if (hash->elf.root.type == bfd_link_hash_undefweak
10682 || hash->elf.root.type == bfd_link_hash_undefined)
10683 {
10684 /* Recognise an old ABI func code entry sym, and
10685 use the func descriptor sym instead if it is
10686 defined. */
10687 if (hash->elf.root.root.string[0] == '.'
10688 && (fdh = lookup_fdh (hash, htab)) != NULL)
10689 {
10690 if (fdh->elf.root.type == bfd_link_hash_defined
10691 || fdh->elf.root.type == bfd_link_hash_defweak)
10692 {
10693 sym_sec = fdh->elf.root.u.def.section;
10694 sym_value = fdh->elf.root.u.def.value;
10695 if (sym_sec->output_section != NULL)
10696 ok_dest = TRUE;
10697 }
10698 else
10699 fdh = NULL;
10700 }
10701 }
10702 else
10703 {
10704 bfd_set_error (bfd_error_bad_value);
10705 goto error_ret_free_internal;
10706 }
10707
10708 destination = 0;
10709 if (ok_dest)
10710 {
10711 sym_value += irela->r_addend;
10712 destination = (sym_value
10713 + sym_sec->output_offset
10714 + sym_sec->output_section->vma);
10715 }
10716
10717 code_sec = sym_sec;
10718 code_value = sym_value;
10719 opd = get_opd_info (sym_sec);
10720 if (opd != NULL)
10721 {
10722 bfd_vma dest;
10723
10724 if (hash == NULL && opd->adjust != NULL)
10725 {
10726 long adjust = opd->adjust[sym_value / 8];
10727 if (adjust == -1)
10728 continue;
10729 code_value += adjust;
10730 sym_value += adjust;
10731 }
10732 dest = opd_entry_value (sym_sec, sym_value,
10733 &code_sec, &code_value);
10734 if (dest != (bfd_vma) -1)
10735 {
10736 destination = dest;
10737 if (fdh != NULL)
10738 {
10739 /* Fixup old ABI sym to point at code
10740 entry. */
10741 hash->elf.root.type = bfd_link_hash_defweak;
10742 hash->elf.root.u.def.section = code_sec;
10743 hash->elf.root.u.def.value = code_value;
10744 }
10745 }
10746 }
10747
10748 /* Determine what (if any) linker stub is needed. */
10749 plt_ent = NULL;
10750 stub_type = ppc_type_of_stub (section, irela, &hash,
10751 &plt_ent, destination);
10752
10753 if (stub_type != ppc_stub_plt_call)
10754 {
10755 /* Check whether we need a TOC adjusting stub.
10756 Since the linker pastes together pieces from
10757 different object files when creating the
10758 _init and _fini functions, it may be that a
10759 call to what looks like a local sym is in
10760 fact a call needing a TOC adjustment. */
10761 if (code_sec != NULL
10762 && code_sec->output_section != NULL
10763 && (htab->stub_group[code_sec->id].toc_off
10764 != htab->stub_group[section->id].toc_off)
10765 && (code_sec->has_toc_reloc
10766 || code_sec->makes_toc_func_call))
10767 stub_type = ppc_stub_long_branch_r2off;
10768 }
10769
10770 if (stub_type == ppc_stub_none)
10771 continue;
10772
10773 /* __tls_get_addr calls might be eliminated. */
10774 if (stub_type != ppc_stub_plt_call
10775 && hash != NULL
10776 && (hash == htab->tls_get_addr
10777 || hash == htab->tls_get_addr_fd)
10778 && section->has_tls_reloc
10779 && irela != internal_relocs)
10780 {
10781 /* Get tls info. */
10782 unsigned char *tls_mask;
10783
10784 if (!get_tls_mask (&tls_mask, NULL, NULL, &local_syms,
10785 irela - 1, input_bfd))
10786 goto error_ret_free_internal;
10787 if (*tls_mask != 0)
10788 continue;
10789 }
10790
10791 /* Support for grouping stub sections. */
10792 id_sec = htab->stub_group[section->id].link_sec;
10793
10794 /* Get the name of this stub. */
10795 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
10796 if (!stub_name)
10797 goto error_ret_free_internal;
10798
10799 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
10800 stub_name, FALSE, FALSE);
10801 if (stub_entry != NULL)
10802 {
10803 /* The proper stub has already been created. */
10804 free (stub_name);
10805 continue;
10806 }
10807
10808 stub_entry = ppc_add_stub (stub_name, section, htab);
10809 if (stub_entry == NULL)
10810 {
10811 free (stub_name);
10812 error_ret_free_internal:
10813 if (elf_section_data (section)->relocs == NULL)
10814 free (internal_relocs);
10815 error_ret_free_local:
10816 if (local_syms != NULL
10817 && (symtab_hdr->contents
10818 != (unsigned char *) local_syms))
10819 free (local_syms);
10820 return FALSE;
10821 }
10822
10823 stub_entry->stub_type = stub_type;
10824 if (stub_type != ppc_stub_plt_call)
10825 {
10826 stub_entry->target_value = code_value;
10827 stub_entry->target_section = code_sec;
10828 }
10829 else
10830 {
10831 stub_entry->target_value = sym_value;
10832 stub_entry->target_section = sym_sec;
10833 }
10834 stub_entry->h = hash;
10835 stub_entry->plt_ent = plt_ent;
10836 stub_entry->addend = irela->r_addend;
10837
10838 if (stub_entry->h != NULL)
10839 htab->stub_globals += 1;
10840 }
10841
10842 /* We're done with the internal relocs, free them. */
10843 if (elf_section_data (section)->relocs != internal_relocs)
10844 free (internal_relocs);
10845 }
10846
10847 if (local_syms != NULL
10848 && symtab_hdr->contents != (unsigned char *) local_syms)
10849 {
10850 if (!info->keep_memory)
10851 free (local_syms);
10852 else
10853 symtab_hdr->contents = (unsigned char *) local_syms;
10854 }
10855 }
10856
10857 /* We may have added some stubs. Find out the new size of the
10858 stub sections. */
10859 for (stub_sec = htab->stub_bfd->sections;
10860 stub_sec != NULL;
10861 stub_sec = stub_sec->next)
10862 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
10863 {
10864 stub_sec->rawsize = stub_sec->size;
10865 stub_sec->size = 0;
10866 stub_sec->reloc_count = 0;
10867 stub_sec->flags &= ~SEC_RELOC;
10868 }
10869
10870 htab->brlt->size = 0;
10871 htab->brlt->reloc_count = 0;
10872 htab->brlt->flags &= ~SEC_RELOC;
10873 if (htab->relbrlt != NULL)
10874 htab->relbrlt->size = 0;
10875
10876 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
10877
10878 if (info->emitrelocations
10879 && htab->glink != NULL && htab->glink->size != 0)
10880 {
10881 htab->glink->reloc_count = 1;
10882 htab->glink->flags |= SEC_RELOC;
10883 }
10884
10885 for (stub_sec = htab->stub_bfd->sections;
10886 stub_sec != NULL;
10887 stub_sec = stub_sec->next)
10888 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
10889 && stub_sec->rawsize != stub_sec->size)
10890 break;
10891
10892 /* Exit from this loop when no stubs have been added, and no stubs
10893 have changed size. */
10894 if (stub_sec == NULL)
10895 break;
10896
10897 /* Ask the linker to do its stuff. */
10898 (*htab->layout_sections_again) ();
10899 }
10900
10901 /* It would be nice to strip htab->brlt from the output if the
10902 section is empty, but it's too late. If we strip sections here,
10903 the dynamic symbol table is corrupted since the section symbol
10904 for the stripped section isn't written. */
10905
10906 return TRUE;
10907 }
10908
10909 /* Called after we have determined section placement. If sections
10910 move, we'll be called again. Provide a value for TOCstart. */
10911
10912 bfd_vma
10913 ppc64_elf_toc (bfd *obfd)
10914 {
10915 asection *s;
10916 bfd_vma TOCstart;
10917
10918 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
10919 order. The TOC starts where the first of these sections starts. */
10920 s = bfd_get_section_by_name (obfd, ".got");
10921 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
10922 s = bfd_get_section_by_name (obfd, ".toc");
10923 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
10924 s = bfd_get_section_by_name (obfd, ".tocbss");
10925 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
10926 s = bfd_get_section_by_name (obfd, ".plt");
10927 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
10928 {
10929 /* This may happen for
10930 o references to TOC base (SYM@toc / TOC[tc0]) without a
10931 .toc directive
10932 o bad linker script
10933 o --gc-sections and empty TOC sections
10934
10935 FIXME: Warn user? */
10936
10937 /* Look for a likely section. We probably won't even be
10938 using TOCstart. */
10939 for (s = obfd->sections; s != NULL; s = s->next)
10940 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY
10941 | SEC_EXCLUDE))
10942 == (SEC_ALLOC | SEC_SMALL_DATA))
10943 break;
10944 if (s == NULL)
10945 for (s = obfd->sections; s != NULL; s = s->next)
10946 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_EXCLUDE))
10947 == (SEC_ALLOC | SEC_SMALL_DATA))
10948 break;
10949 if (s == NULL)
10950 for (s = obfd->sections; s != NULL; s = s->next)
10951 if ((s->flags & (SEC_ALLOC | SEC_READONLY | SEC_EXCLUDE))
10952 == SEC_ALLOC)
10953 break;
10954 if (s == NULL)
10955 for (s = obfd->sections; s != NULL; s = s->next)
10956 if ((s->flags & (SEC_ALLOC | SEC_EXCLUDE)) == SEC_ALLOC)
10957 break;
10958 }
10959
10960 TOCstart = 0;
10961 if (s != NULL)
10962 TOCstart = s->output_section->vma + s->output_offset;
10963
10964 return TOCstart;
10965 }
10966
10967 /* Build all the stubs associated with the current output file.
10968 The stubs are kept in a hash table attached to the main linker
10969 hash table. This function is called via gldelf64ppc_finish. */
10970
10971 bfd_boolean
10972 ppc64_elf_build_stubs (bfd_boolean emit_stub_syms,
10973 struct bfd_link_info *info,
10974 char **stats)
10975 {
10976 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10977 asection *stub_sec;
10978 bfd_byte *p;
10979 int stub_sec_count = 0;
10980
10981 if (htab == NULL)
10982 return FALSE;
10983
10984 htab->emit_stub_syms = emit_stub_syms;
10985
10986 /* Allocate memory to hold the linker stubs. */
10987 for (stub_sec = htab->stub_bfd->sections;
10988 stub_sec != NULL;
10989 stub_sec = stub_sec->next)
10990 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
10991 && stub_sec->size != 0)
10992 {
10993 stub_sec->contents = bfd_zalloc (htab->stub_bfd, stub_sec->size);
10994 if (stub_sec->contents == NULL)
10995 return FALSE;
10996 /* We want to check that built size is the same as calculated
10997 size. rawsize is a convenient location to use. */
10998 stub_sec->rawsize = stub_sec->size;
10999 stub_sec->size = 0;
11000 }
11001
11002 if (htab->glink != NULL && htab->glink->size != 0)
11003 {
11004 unsigned int indx;
11005 bfd_vma plt0;
11006
11007 /* Build the .glink plt call stub. */
11008 if (htab->emit_stub_syms)
11009 {
11010 struct elf_link_hash_entry *h;
11011 h = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
11012 TRUE, FALSE, FALSE);
11013 if (h == NULL)
11014 return FALSE;
11015 if (h->root.type == bfd_link_hash_new)
11016 {
11017 h->root.type = bfd_link_hash_defined;
11018 h->root.u.def.section = htab->glink;
11019 h->root.u.def.value = 8;
11020 h->ref_regular = 1;
11021 h->def_regular = 1;
11022 h->ref_regular_nonweak = 1;
11023 h->forced_local = 1;
11024 h->non_elf = 0;
11025 }
11026 }
11027 plt0 = htab->plt->output_section->vma + htab->plt->output_offset - 16;
11028 if (info->emitrelocations)
11029 {
11030 Elf_Internal_Rela *r = get_relocs (htab->glink, 1);
11031 if (r == NULL)
11032 return FALSE;
11033 r->r_offset = (htab->glink->output_offset
11034 + htab->glink->output_section->vma);
11035 r->r_info = ELF64_R_INFO (0, R_PPC64_REL64);
11036 r->r_addend = plt0;
11037 }
11038 p = htab->glink->contents;
11039 plt0 -= htab->glink->output_section->vma + htab->glink->output_offset;
11040 bfd_put_64 (htab->glink->owner, plt0, p);
11041 p += 8;
11042 bfd_put_32 (htab->glink->owner, MFLR_R12, p);
11043 p += 4;
11044 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
11045 p += 4;
11046 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
11047 p += 4;
11048 bfd_put_32 (htab->glink->owner, LD_R2_M16R11, p);
11049 p += 4;
11050 bfd_put_32 (htab->glink->owner, MTLR_R12, p);
11051 p += 4;
11052 bfd_put_32 (htab->glink->owner, ADD_R12_R2_R11, p);
11053 p += 4;
11054 bfd_put_32 (htab->glink->owner, LD_R11_0R12, p);
11055 p += 4;
11056 bfd_put_32 (htab->glink->owner, LD_R2_0R12 | 8, p);
11057 p += 4;
11058 bfd_put_32 (htab->glink->owner, MTCTR_R11, p);
11059 p += 4;
11060 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | 16, p);
11061 p += 4;
11062 bfd_put_32 (htab->glink->owner, BCTR, p);
11063 p += 4;
11064 while (p - htab->glink->contents < GLINK_CALL_STUB_SIZE)
11065 {
11066 bfd_put_32 (htab->glink->owner, NOP, p);
11067 p += 4;
11068 }
11069
11070 /* Build the .glink lazy link call stubs. */
11071 indx = 0;
11072 while (p < htab->glink->contents + htab->glink->size)
11073 {
11074 if (indx < 0x8000)
11075 {
11076 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
11077 p += 4;
11078 }
11079 else
11080 {
11081 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
11082 p += 4;
11083 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx), p);
11084 p += 4;
11085 }
11086 bfd_put_32 (htab->glink->owner,
11087 B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p);
11088 indx++;
11089 p += 4;
11090 }
11091 htab->glink->rawsize = p - htab->glink->contents;
11092 }
11093
11094 if (htab->brlt->size != 0)
11095 {
11096 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
11097 htab->brlt->size);
11098 if (htab->brlt->contents == NULL)
11099 return FALSE;
11100 }
11101 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
11102 {
11103 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
11104 htab->relbrlt->size);
11105 if (htab->relbrlt->contents == NULL)
11106 return FALSE;
11107 }
11108
11109 /* Build the stubs as directed by the stub hash table. */
11110 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
11111
11112 if (htab->relbrlt != NULL)
11113 htab->relbrlt->reloc_count = 0;
11114
11115 for (stub_sec = htab->stub_bfd->sections;
11116 stub_sec != NULL;
11117 stub_sec = stub_sec->next)
11118 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
11119 {
11120 stub_sec_count += 1;
11121 if (stub_sec->rawsize != stub_sec->size)
11122 break;
11123 }
11124
11125 if (stub_sec != NULL
11126 || htab->glink->rawsize != htab->glink->size)
11127 {
11128 htab->stub_error = TRUE;
11129 (*_bfd_error_handler) (_("stubs don't match calculated size"));
11130 }
11131
11132 if (htab->stub_error)
11133 return FALSE;
11134
11135 if (stats != NULL)
11136 {
11137 *stats = bfd_malloc (500);
11138 if (*stats == NULL)
11139 return FALSE;
11140
11141 sprintf (*stats, _("linker stubs in %u group%s\n"
11142 " branch %lu\n"
11143 " toc adjust %lu\n"
11144 " long branch %lu\n"
11145 " long toc adj %lu\n"
11146 " plt call %lu"),
11147 stub_sec_count,
11148 stub_sec_count == 1 ? "" : "s",
11149 htab->stub_count[ppc_stub_long_branch - 1],
11150 htab->stub_count[ppc_stub_long_branch_r2off - 1],
11151 htab->stub_count[ppc_stub_plt_branch - 1],
11152 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
11153 htab->stub_count[ppc_stub_plt_call - 1]);
11154 }
11155 return TRUE;
11156 }
11157
11158 /* This function undoes the changes made by add_symbol_adjust. */
11159
11160 static bfd_boolean
11161 undo_symbol_twiddle (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
11162 {
11163 struct ppc_link_hash_entry *eh;
11164
11165 if (h->root.type == bfd_link_hash_indirect)
11166 return TRUE;
11167
11168 if (h->root.type == bfd_link_hash_warning)
11169 h = (struct elf_link_hash_entry *) h->root.u.i.link;
11170
11171 eh = (struct ppc_link_hash_entry *) h;
11172 if (eh->elf.root.type != bfd_link_hash_undefweak || !eh->was_undefined)
11173 return TRUE;
11174
11175 eh->elf.root.type = bfd_link_hash_undefined;
11176 return TRUE;
11177 }
11178
11179 void
11180 ppc64_elf_restore_symbols (struct bfd_link_info *info)
11181 {
11182 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11183
11184 if (htab != NULL)
11185 elf_link_hash_traverse (&htab->elf, undo_symbol_twiddle, info);
11186 }
11187
11188 /* What to do when ld finds relocations against symbols defined in
11189 discarded sections. */
11190
11191 static unsigned int
11192 ppc64_elf_action_discarded (asection *sec)
11193 {
11194 if (strcmp (".opd", sec->name) == 0)
11195 return 0;
11196
11197 if (strcmp (".toc", sec->name) == 0)
11198 return 0;
11199
11200 if (strcmp (".toc1", sec->name) == 0)
11201 return 0;
11202
11203 return _bfd_elf_default_action_discarded (sec);
11204 }
11205
11206 /* The RELOCATE_SECTION function is called by the ELF backend linker
11207 to handle the relocations for a section.
11208
11209 The relocs are always passed as Rela structures; if the section
11210 actually uses Rel structures, the r_addend field will always be
11211 zero.
11212
11213 This function is responsible for adjust the section contents as
11214 necessary, and (if using Rela relocs and generating a
11215 relocatable output file) adjusting the reloc addend as
11216 necessary.
11217
11218 This function does not have to worry about setting the reloc
11219 address or the reloc symbol index.
11220
11221 LOCAL_SYMS is a pointer to the swapped in local symbols.
11222
11223 LOCAL_SECTIONS is an array giving the section in the input file
11224 corresponding to the st_shndx field of each local symbol.
11225
11226 The global hash table entry for the global symbols can be found
11227 via elf_sym_hashes (input_bfd).
11228
11229 When generating relocatable output, this function must handle
11230 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
11231 going to be the section symbol corresponding to the output
11232 section, which means that the addend must be adjusted
11233 accordingly. */
11234
11235 static bfd_boolean
11236 ppc64_elf_relocate_section (bfd *output_bfd,
11237 struct bfd_link_info *info,
11238 bfd *input_bfd,
11239 asection *input_section,
11240 bfd_byte *contents,
11241 Elf_Internal_Rela *relocs,
11242 Elf_Internal_Sym *local_syms,
11243 asection **local_sections)
11244 {
11245 struct ppc_link_hash_table *htab;
11246 Elf_Internal_Shdr *symtab_hdr;
11247 struct elf_link_hash_entry **sym_hashes;
11248 Elf_Internal_Rela *rel;
11249 Elf_Internal_Rela *relend;
11250 Elf_Internal_Rela outrel;
11251 bfd_byte *loc;
11252 struct got_entry **local_got_ents;
11253 bfd_vma TOCstart;
11254 bfd_boolean ret = TRUE;
11255 bfd_boolean is_opd;
11256 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
11257 bfd_boolean is_power4 = FALSE;
11258 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
11259
11260 /* Initialize howto table if needed. */
11261 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
11262 ppc_howto_init ();
11263
11264 htab = ppc_hash_table (info);
11265 if (htab == NULL)
11266 return FALSE;
11267
11268 /* Don't relocate stub sections. */
11269 if (input_section->owner == htab->stub_bfd)
11270 return TRUE;
11271
11272 BFD_ASSERT (is_ppc64_elf (input_bfd));
11273
11274 local_got_ents = elf_local_got_ents (input_bfd);
11275 TOCstart = elf_gp (output_bfd);
11276 symtab_hdr = &elf_symtab_hdr (input_bfd);
11277 sym_hashes = elf_sym_hashes (input_bfd);
11278 is_opd = ppc64_elf_section_data (input_section)->sec_type == sec_opd;
11279
11280 rel = relocs;
11281 relend = relocs + input_section->reloc_count;
11282 for (; rel < relend; rel++)
11283 {
11284 enum elf_ppc64_reloc_type r_type;
11285 bfd_vma addend, orig_addend;
11286 bfd_reloc_status_type r;
11287 Elf_Internal_Sym *sym;
11288 asection *sec;
11289 struct elf_link_hash_entry *h_elf;
11290 struct ppc_link_hash_entry *h;
11291 struct ppc_link_hash_entry *fdh;
11292 const char *sym_name;
11293 unsigned long r_symndx, toc_symndx;
11294 bfd_vma toc_addend;
11295 unsigned char tls_mask, tls_gd, tls_type;
11296 unsigned char sym_type;
11297 bfd_vma relocation;
11298 bfd_boolean unresolved_reloc;
11299 bfd_boolean warned;
11300 unsigned long insn, mask;
11301 struct ppc_stub_hash_entry *stub_entry;
11302 bfd_vma max_br_offset;
11303 bfd_vma from;
11304
11305 r_type = ELF64_R_TYPE (rel->r_info);
11306 r_symndx = ELF64_R_SYM (rel->r_info);
11307
11308 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
11309 symbol of the previous ADDR64 reloc. The symbol gives us the
11310 proper TOC base to use. */
11311 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
11312 && rel != relocs
11313 && ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_ADDR64
11314 && is_opd)
11315 r_symndx = ELF64_R_SYM (rel[-1].r_info);
11316
11317 sym = NULL;
11318 sec = NULL;
11319 h_elf = NULL;
11320 sym_name = NULL;
11321 unresolved_reloc = FALSE;
11322 warned = FALSE;
11323 orig_addend = rel->r_addend;
11324
11325 if (r_symndx < symtab_hdr->sh_info)
11326 {
11327 /* It's a local symbol. */
11328 struct _opd_sec_data *opd;
11329
11330 sym = local_syms + r_symndx;
11331 sec = local_sections[r_symndx];
11332 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
11333 sym_type = ELF64_ST_TYPE (sym->st_info);
11334 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
11335 opd = get_opd_info (sec);
11336 if (opd != NULL && opd->adjust != NULL)
11337 {
11338 long adjust = opd->adjust[(sym->st_value + rel->r_addend) / 8];
11339 if (adjust == -1)
11340 relocation = 0;
11341 else
11342 {
11343 /* If this is a relocation against the opd section sym
11344 and we have edited .opd, adjust the reloc addend so
11345 that ld -r and ld --emit-relocs output is correct.
11346 If it is a reloc against some other .opd symbol,
11347 then the symbol value will be adjusted later. */
11348 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
11349 rel->r_addend += adjust;
11350 else
11351 relocation += adjust;
11352 }
11353 }
11354 }
11355 else
11356 {
11357 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
11358 r_symndx, symtab_hdr, sym_hashes,
11359 h_elf, sec, relocation,
11360 unresolved_reloc, warned);
11361 sym_name = h_elf->root.root.string;
11362 sym_type = h_elf->type;
11363 }
11364 h = (struct ppc_link_hash_entry *) h_elf;
11365
11366 if (sec != NULL && elf_discarded_section (sec))
11367 {
11368 /* For relocs against symbols from removed linkonce sections,
11369 or sections discarded by a linker script, we just want the
11370 section contents zeroed. Avoid any special processing. */
11371 _bfd_clear_contents (ppc64_elf_howto_table[r_type], input_bfd,
11372 contents + rel->r_offset);
11373 rel->r_info = 0;
11374 rel->r_addend = 0;
11375 continue;
11376 }
11377
11378 if (info->relocatable)
11379 continue;
11380
11381 /* TLS optimizations. Replace instruction sequences and relocs
11382 based on information we collected in tls_optimize. We edit
11383 RELOCS so that --emit-relocs will output something sensible
11384 for the final instruction stream. */
11385 tls_mask = 0;
11386 tls_gd = 0;
11387 toc_symndx = 0;
11388 if (h != NULL)
11389 tls_mask = h->tls_mask;
11390 else if (local_got_ents != NULL)
11391 {
11392 struct plt_entry **local_plt = (struct plt_entry **)
11393 (local_got_ents + symtab_hdr->sh_info);
11394 unsigned char *lgot_masks = (unsigned char *)
11395 (local_plt + symtab_hdr->sh_info);
11396 tls_mask = lgot_masks[r_symndx];
11397 }
11398 if (tls_mask == 0
11399 && (r_type == R_PPC64_TLS
11400 || r_type == R_PPC64_TLSGD
11401 || r_type == R_PPC64_TLSLD))
11402 {
11403 /* Check for toc tls entries. */
11404 unsigned char *toc_tls;
11405
11406 if (!get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
11407 &local_syms, rel, input_bfd))
11408 return FALSE;
11409
11410 if (toc_tls)
11411 tls_mask = *toc_tls;
11412 }
11413
11414 /* Check that tls relocs are used with tls syms, and non-tls
11415 relocs are used with non-tls syms. */
11416 if (r_symndx != 0
11417 && r_type != R_PPC64_NONE
11418 && (h == NULL
11419 || h->elf.root.type == bfd_link_hash_defined
11420 || h->elf.root.type == bfd_link_hash_defweak)
11421 && (IS_PPC64_TLS_RELOC (r_type)
11422 != (sym_type == STT_TLS
11423 || (sym_type == STT_SECTION
11424 && (sec->flags & SEC_THREAD_LOCAL) != 0))))
11425 {
11426 if (tls_mask != 0
11427 && (r_type == R_PPC64_TLS
11428 || r_type == R_PPC64_TLSGD
11429 || r_type == R_PPC64_TLSLD))
11430 /* R_PPC64_TLS is OK against a symbol in the TOC. */
11431 ;
11432 else
11433 (*_bfd_error_handler)
11434 (!IS_PPC64_TLS_RELOC (r_type)
11435 ? _("%B(%A+0x%lx): %s used with TLS symbol %s")
11436 : _("%B(%A+0x%lx): %s used with non-TLS symbol %s"),
11437 input_bfd,
11438 input_section,
11439 (long) rel->r_offset,
11440 ppc64_elf_howto_table[r_type]->name,
11441 sym_name);
11442 }
11443
11444 /* Ensure reloc mapping code below stays sane. */
11445 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
11446 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
11447 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
11448 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
11449 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
11450 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
11451 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
11452 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
11453 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
11454 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
11455 abort ();
11456
11457 switch (r_type)
11458 {
11459 default:
11460 break;
11461
11462 case R_PPC64_TOC16:
11463 case R_PPC64_TOC16_LO:
11464 case R_PPC64_TOC16_DS:
11465 case R_PPC64_TOC16_LO_DS:
11466 {
11467 /* Check for toc tls entries. */
11468 unsigned char *toc_tls;
11469 int retval;
11470
11471 retval = get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
11472 &local_syms, rel, input_bfd);
11473 if (retval == 0)
11474 return FALSE;
11475
11476 if (toc_tls)
11477 {
11478 tls_mask = *toc_tls;
11479 if (r_type == R_PPC64_TOC16_DS
11480 || r_type == R_PPC64_TOC16_LO_DS)
11481 {
11482 if (tls_mask != 0
11483 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
11484 goto toctprel;
11485 }
11486 else
11487 {
11488 /* If we found a GD reloc pair, then we might be
11489 doing a GD->IE transition. */
11490 if (retval == 2)
11491 {
11492 tls_gd = TLS_TPRELGD;
11493 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
11494 goto tls_ldgd_opt;
11495 }
11496 else if (retval == 3)
11497 {
11498 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
11499 goto tls_ldgd_opt;
11500 }
11501 }
11502 }
11503 }
11504 break;
11505
11506 case R_PPC64_GOT_TPREL16_DS:
11507 case R_PPC64_GOT_TPREL16_LO_DS:
11508 if (tls_mask != 0
11509 && (tls_mask & TLS_TPREL) == 0)
11510 {
11511 toctprel:
11512 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
11513 insn &= 31 << 21;
11514 insn |= 0x3c0d0000; /* addis 0,13,0 */
11515 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
11516 r_type = R_PPC64_TPREL16_HA;
11517 if (toc_symndx != 0)
11518 {
11519 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
11520 rel->r_addend = toc_addend;
11521 /* We changed the symbol. Start over in order to
11522 get h, sym, sec etc. right. */
11523 rel--;
11524 continue;
11525 }
11526 else
11527 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11528 }
11529 break;
11530
11531 case R_PPC64_TLS:
11532 if (tls_mask != 0
11533 && (tls_mask & TLS_TPREL) == 0)
11534 {
11535 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
11536 insn = _bfd_elf_ppc_at_tls_transform (insn, 13);
11537 if (insn == 0)
11538 abort ();
11539 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
11540 /* Was PPC64_TLS which sits on insn boundary, now
11541 PPC64_TPREL16_LO which is at low-order half-word. */
11542 rel->r_offset += d_offset;
11543 r_type = R_PPC64_TPREL16_LO;
11544 if (toc_symndx != 0)
11545 {
11546 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
11547 rel->r_addend = toc_addend;
11548 /* We changed the symbol. Start over in order to
11549 get h, sym, sec etc. right. */
11550 rel--;
11551 continue;
11552 }
11553 else
11554 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11555 }
11556 break;
11557
11558 case R_PPC64_GOT_TLSGD16_HI:
11559 case R_PPC64_GOT_TLSGD16_HA:
11560 tls_gd = TLS_TPRELGD;
11561 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
11562 goto tls_gdld_hi;
11563 break;
11564
11565 case R_PPC64_GOT_TLSLD16_HI:
11566 case R_PPC64_GOT_TLSLD16_HA:
11567 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
11568 {
11569 tls_gdld_hi:
11570 if ((tls_mask & tls_gd) != 0)
11571 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
11572 + R_PPC64_GOT_TPREL16_DS);
11573 else
11574 {
11575 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
11576 rel->r_offset -= d_offset;
11577 r_type = R_PPC64_NONE;
11578 }
11579 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11580 }
11581 break;
11582
11583 case R_PPC64_GOT_TLSGD16:
11584 case R_PPC64_GOT_TLSGD16_LO:
11585 tls_gd = TLS_TPRELGD;
11586 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
11587 goto tls_ldgd_opt;
11588 break;
11589
11590 case R_PPC64_GOT_TLSLD16:
11591 case R_PPC64_GOT_TLSLD16_LO:
11592 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
11593 {
11594 unsigned int insn1, insn2, insn3;
11595 bfd_vma offset;
11596
11597 tls_ldgd_opt:
11598 offset = (bfd_vma) -1;
11599 /* If not using the newer R_PPC64_TLSGD/LD to mark
11600 __tls_get_addr calls, we must trust that the call
11601 stays with its arg setup insns, ie. that the next
11602 reloc is the __tls_get_addr call associated with
11603 the current reloc. Edit both insns. */
11604 if (input_section->has_tls_get_addr_call
11605 && rel + 1 < relend
11606 && branch_reloc_hash_match (input_bfd, rel + 1,
11607 htab->tls_get_addr,
11608 htab->tls_get_addr_fd))
11609 offset = rel[1].r_offset;
11610 if ((tls_mask & tls_gd) != 0)
11611 {
11612 /* IE */
11613 insn1 = bfd_get_32 (output_bfd,
11614 contents + rel->r_offset - d_offset);
11615 insn1 &= (1 << 26) - (1 << 2);
11616 insn1 |= 58 << 26; /* ld */
11617 insn2 = 0x7c636a14; /* add 3,3,13 */
11618 if (offset != (bfd_vma) -1)
11619 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
11620 if ((tls_mask & TLS_EXPLICIT) == 0)
11621 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
11622 + R_PPC64_GOT_TPREL16_DS);
11623 else
11624 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
11625 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11626 }
11627 else
11628 {
11629 /* LE */
11630 insn1 = 0x3c6d0000; /* addis 3,13,0 */
11631 insn2 = 0x38630000; /* addi 3,3,0 */
11632 if (tls_gd == 0)
11633 {
11634 /* Was an LD reloc. */
11635 if (toc_symndx)
11636 sec = local_sections[toc_symndx];
11637 for (r_symndx = 0;
11638 r_symndx < symtab_hdr->sh_info;
11639 r_symndx++)
11640 if (local_sections[r_symndx] == sec)
11641 break;
11642 if (r_symndx >= symtab_hdr->sh_info)
11643 r_symndx = 0;
11644 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
11645 if (r_symndx != 0)
11646 rel->r_addend -= (local_syms[r_symndx].st_value
11647 + sec->output_offset
11648 + sec->output_section->vma);
11649 }
11650 else if (toc_symndx != 0)
11651 {
11652 r_symndx = toc_symndx;
11653 rel->r_addend = toc_addend;
11654 }
11655 r_type = R_PPC64_TPREL16_HA;
11656 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11657 if (offset != (bfd_vma) -1)
11658 {
11659 rel[1].r_info = ELF64_R_INFO (r_symndx,
11660 R_PPC64_TPREL16_LO);
11661 rel[1].r_offset = offset + d_offset;
11662 rel[1].r_addend = rel->r_addend;
11663 }
11664 }
11665 bfd_put_32 (output_bfd, insn1,
11666 contents + rel->r_offset - d_offset);
11667 if (offset != (bfd_vma) -1)
11668 {
11669 insn3 = bfd_get_32 (output_bfd,
11670 contents + offset + 4);
11671 if (insn3 == NOP
11672 || insn3 == CROR_151515 || insn3 == CROR_313131)
11673 {
11674 rel[1].r_offset += 4;
11675 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
11676 insn2 = NOP;
11677 }
11678 bfd_put_32 (output_bfd, insn2, contents + offset);
11679 }
11680 if ((tls_mask & tls_gd) == 0
11681 && (tls_gd == 0 || toc_symndx != 0))
11682 {
11683 /* We changed the symbol. Start over in order
11684 to get h, sym, sec etc. right. */
11685 rel--;
11686 continue;
11687 }
11688 }
11689 break;
11690
11691 case R_PPC64_TLSGD:
11692 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
11693 {
11694 unsigned int insn2, insn3;
11695 bfd_vma offset = rel->r_offset;
11696
11697 if ((tls_mask & TLS_TPRELGD) != 0)
11698 {
11699 /* IE */
11700 r_type = R_PPC64_NONE;
11701 insn2 = 0x7c636a14; /* add 3,3,13 */
11702 }
11703 else
11704 {
11705 /* LE */
11706 if (toc_symndx != 0)
11707 {
11708 r_symndx = toc_symndx;
11709 rel->r_addend = toc_addend;
11710 }
11711 r_type = R_PPC64_TPREL16_LO;
11712 rel->r_offset = offset + d_offset;
11713 insn2 = 0x38630000; /* addi 3,3,0 */
11714 }
11715 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11716 /* Zap the reloc on the _tls_get_addr call too. */
11717 BFD_ASSERT (offset == rel[1].r_offset);
11718 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
11719 insn3 = bfd_get_32 (output_bfd,
11720 contents + offset + 4);
11721 if (insn3 == NOP
11722 || insn3 == CROR_151515 || insn3 == CROR_313131)
11723 {
11724 rel->r_offset += 4;
11725 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
11726 insn2 = NOP;
11727 }
11728 bfd_put_32 (output_bfd, insn2, contents + offset);
11729 if ((tls_mask & TLS_TPRELGD) == 0 && toc_symndx != 0)
11730 {
11731 rel--;
11732 continue;
11733 }
11734 }
11735 break;
11736
11737 case R_PPC64_TLSLD:
11738 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
11739 {
11740 unsigned int insn2, insn3;
11741 bfd_vma offset = rel->r_offset;
11742
11743 if (toc_symndx)
11744 sec = local_sections[toc_symndx];
11745 for (r_symndx = 0;
11746 r_symndx < symtab_hdr->sh_info;
11747 r_symndx++)
11748 if (local_sections[r_symndx] == sec)
11749 break;
11750 if (r_symndx >= symtab_hdr->sh_info)
11751 r_symndx = 0;
11752 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
11753 if (r_symndx != 0)
11754 rel->r_addend -= (local_syms[r_symndx].st_value
11755 + sec->output_offset
11756 + sec->output_section->vma);
11757
11758 r_type = R_PPC64_TPREL16_LO;
11759 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11760 rel->r_offset = offset + d_offset;
11761 /* Zap the reloc on the _tls_get_addr call too. */
11762 BFD_ASSERT (offset == rel[1].r_offset);
11763 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
11764 insn2 = 0x38630000; /* addi 3,3,0 */
11765 insn3 = bfd_get_32 (output_bfd,
11766 contents + offset + 4);
11767 if (insn3 == NOP
11768 || insn3 == CROR_151515 || insn3 == CROR_313131)
11769 {
11770 rel->r_offset += 4;
11771 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
11772 insn2 = NOP;
11773 }
11774 bfd_put_32 (output_bfd, insn2, contents + offset);
11775 rel--;
11776 continue;
11777 }
11778 break;
11779
11780 case R_PPC64_DTPMOD64:
11781 if (rel + 1 < relend
11782 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
11783 && rel[1].r_offset == rel->r_offset + 8)
11784 {
11785 if ((tls_mask & TLS_GD) == 0)
11786 {
11787 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
11788 if ((tls_mask & TLS_TPRELGD) != 0)
11789 r_type = R_PPC64_TPREL64;
11790 else
11791 {
11792 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
11793 r_type = R_PPC64_NONE;
11794 }
11795 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11796 }
11797 }
11798 else
11799 {
11800 if ((tls_mask & TLS_LD) == 0)
11801 {
11802 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
11803 r_type = R_PPC64_NONE;
11804 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11805 }
11806 }
11807 break;
11808
11809 case R_PPC64_TPREL64:
11810 if ((tls_mask & TLS_TPREL) == 0)
11811 {
11812 r_type = R_PPC64_NONE;
11813 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11814 }
11815 break;
11816 }
11817
11818 /* Handle other relocations that tweak non-addend part of insn. */
11819 insn = 0;
11820 max_br_offset = 1 << 25;
11821 addend = rel->r_addend;
11822 switch (r_type)
11823 {
11824 default:
11825 break;
11826
11827 /* Branch taken prediction relocations. */
11828 case R_PPC64_ADDR14_BRTAKEN:
11829 case R_PPC64_REL14_BRTAKEN:
11830 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
11831 /* Fall thru. */
11832
11833 /* Branch not taken prediction relocations. */
11834 case R_PPC64_ADDR14_BRNTAKEN:
11835 case R_PPC64_REL14_BRNTAKEN:
11836 insn |= bfd_get_32 (output_bfd,
11837 contents + rel->r_offset) & ~(0x01 << 21);
11838 /* Fall thru. */
11839
11840 case R_PPC64_REL14:
11841 max_br_offset = 1 << 15;
11842 /* Fall thru. */
11843
11844 case R_PPC64_REL24:
11845 /* Calls to functions with a different TOC, such as calls to
11846 shared objects, need to alter the TOC pointer. This is
11847 done using a linkage stub. A REL24 branching to these
11848 linkage stubs needs to be followed by a nop, as the nop
11849 will be replaced with an instruction to restore the TOC
11850 base pointer. */
11851 stub_entry = NULL;
11852 fdh = h;
11853 if (h != NULL
11854 && h->oh != NULL
11855 && h->oh->is_func_descriptor)
11856 fdh = ppc_follow_link (h->oh);
11857 if (((fdh != NULL
11858 && fdh->elf.plt.plist != NULL)
11859 || (sec != NULL
11860 && sec->output_section != NULL
11861 && sec->id <= htab->top_id
11862 && (htab->stub_group[sec->id].toc_off
11863 != htab->stub_group[input_section->id].toc_off))
11864 || (h == NULL
11865 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
11866 && (stub_entry = ppc_get_stub_entry (input_section, sec, fdh,
11867 rel, htab)) != NULL
11868 && (stub_entry->stub_type == ppc_stub_plt_call
11869 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
11870 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
11871 {
11872 bfd_boolean can_plt_call = FALSE;
11873
11874 if (rel->r_offset + 8 <= input_section->size)
11875 {
11876 unsigned long nop;
11877 nop = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
11878 if (nop == NOP
11879 || nop == CROR_151515 || nop == CROR_313131)
11880 {
11881 if (h != NULL
11882 && (h == htab->tls_get_addr_fd
11883 || h == htab->tls_get_addr)
11884 && !htab->no_tls_get_addr_opt)
11885 {
11886 /* Special stub used, leave nop alone. */
11887 }
11888 else
11889 bfd_put_32 (input_bfd, LD_R2_40R1,
11890 contents + rel->r_offset + 4);
11891 can_plt_call = TRUE;
11892 }
11893 }
11894
11895 if (!can_plt_call)
11896 {
11897 if (stub_entry->stub_type == ppc_stub_plt_call)
11898 {
11899 /* If this is a plain branch rather than a branch
11900 and link, don't require a nop. However, don't
11901 allow tail calls in a shared library as they
11902 will result in r2 being corrupted. */
11903 unsigned long br;
11904 br = bfd_get_32 (input_bfd, contents + rel->r_offset);
11905 if (info->executable && (br & 1) == 0)
11906 can_plt_call = TRUE;
11907 else
11908 stub_entry = NULL;
11909 }
11910 else if (h != NULL
11911 && strcmp (h->elf.root.root.string,
11912 ".__libc_start_main") == 0)
11913 {
11914 /* Allow crt1 branch to go via a toc adjusting stub. */
11915 can_plt_call = TRUE;
11916 }
11917 else
11918 {
11919 if (strcmp (input_section->output_section->name,
11920 ".init") == 0
11921 || strcmp (input_section->output_section->name,
11922 ".fini") == 0)
11923 (*_bfd_error_handler)
11924 (_("%B(%A+0x%lx): automatic multiple TOCs "
11925 "not supported using your crt files; "
11926 "recompile with -mminimal-toc or upgrade gcc"),
11927 input_bfd,
11928 input_section,
11929 (long) rel->r_offset);
11930 else
11931 (*_bfd_error_handler)
11932 (_("%B(%A+0x%lx): sibling call optimization to `%s' "
11933 "does not allow automatic multiple TOCs; "
11934 "recompile with -mminimal-toc or "
11935 "-fno-optimize-sibling-calls, "
11936 "or make `%s' extern"),
11937 input_bfd,
11938 input_section,
11939 (long) rel->r_offset,
11940 sym_name,
11941 sym_name);
11942 bfd_set_error (bfd_error_bad_value);
11943 ret = FALSE;
11944 }
11945 }
11946
11947 if (can_plt_call
11948 && stub_entry->stub_type == ppc_stub_plt_call)
11949 unresolved_reloc = FALSE;
11950 }
11951
11952 if (stub_entry == NULL
11953 && get_opd_info (sec) != NULL)
11954 {
11955 /* The branch destination is the value of the opd entry. */
11956 bfd_vma off = (relocation + addend
11957 - sec->output_section->vma
11958 - sec->output_offset);
11959 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL);
11960 if (dest != (bfd_vma) -1)
11961 {
11962 relocation = dest;
11963 addend = 0;
11964 }
11965 }
11966
11967 /* If the branch is out of reach we ought to have a long
11968 branch stub. */
11969 from = (rel->r_offset
11970 + input_section->output_offset
11971 + input_section->output_section->vma);
11972
11973 if (stub_entry == NULL
11974 && (relocation + addend - from + max_br_offset
11975 >= 2 * max_br_offset)
11976 && r_type != R_PPC64_ADDR14_BRTAKEN
11977 && r_type != R_PPC64_ADDR14_BRNTAKEN)
11978 stub_entry = ppc_get_stub_entry (input_section, sec, fdh, rel,
11979 htab);
11980
11981 if (stub_entry != NULL)
11982 {
11983 /* Munge up the value and addend so that we call the stub
11984 rather than the procedure directly. */
11985 relocation = (stub_entry->stub_offset
11986 + stub_entry->stub_sec->output_offset
11987 + stub_entry->stub_sec->output_section->vma);
11988 addend = 0;
11989 }
11990
11991 if (insn != 0)
11992 {
11993 if (is_power4)
11994 {
11995 /* Set 'a' bit. This is 0b00010 in BO field for branch
11996 on CR(BI) insns (BO == 001at or 011at), and 0b01000
11997 for branch on CTR insns (BO == 1a00t or 1a01t). */
11998 if ((insn & (0x14 << 21)) == (0x04 << 21))
11999 insn |= 0x02 << 21;
12000 else if ((insn & (0x14 << 21)) == (0x10 << 21))
12001 insn |= 0x08 << 21;
12002 else
12003 break;
12004 }
12005 else
12006 {
12007 /* Invert 'y' bit if not the default. */
12008 if ((bfd_signed_vma) (relocation + addend - from) < 0)
12009 insn ^= 0x01 << 21;
12010 }
12011
12012 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
12013 }
12014
12015 /* NOP out calls to undefined weak functions.
12016 We can thus call a weak function without first
12017 checking whether the function is defined. */
12018 else if (h != NULL
12019 && h->elf.root.type == bfd_link_hash_undefweak
12020 && h->elf.dynindx == -1
12021 && r_type == R_PPC64_REL24
12022 && relocation == 0
12023 && addend == 0)
12024 {
12025 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
12026 continue;
12027 }
12028 break;
12029 }
12030
12031 /* Set `addend'. */
12032 tls_type = 0;
12033 switch (r_type)
12034 {
12035 default:
12036 (*_bfd_error_handler)
12037 (_("%B: unknown relocation type %d for symbol %s"),
12038 input_bfd, (int) r_type, sym_name);
12039
12040 bfd_set_error (bfd_error_bad_value);
12041 ret = FALSE;
12042 continue;
12043
12044 case R_PPC64_NONE:
12045 case R_PPC64_TLS:
12046 case R_PPC64_TLSGD:
12047 case R_PPC64_TLSLD:
12048 case R_PPC64_GNU_VTINHERIT:
12049 case R_PPC64_GNU_VTENTRY:
12050 continue;
12051
12052 /* GOT16 relocations. Like an ADDR16 using the symbol's
12053 address in the GOT as relocation value instead of the
12054 symbol's value itself. Also, create a GOT entry for the
12055 symbol and put the symbol value there. */
12056 case R_PPC64_GOT_TLSGD16:
12057 case R_PPC64_GOT_TLSGD16_LO:
12058 case R_PPC64_GOT_TLSGD16_HI:
12059 case R_PPC64_GOT_TLSGD16_HA:
12060 tls_type = TLS_TLS | TLS_GD;
12061 goto dogot;
12062
12063 case R_PPC64_GOT_TLSLD16:
12064 case R_PPC64_GOT_TLSLD16_LO:
12065 case R_PPC64_GOT_TLSLD16_HI:
12066 case R_PPC64_GOT_TLSLD16_HA:
12067 tls_type = TLS_TLS | TLS_LD;
12068 goto dogot;
12069
12070 case R_PPC64_GOT_TPREL16_DS:
12071 case R_PPC64_GOT_TPREL16_LO_DS:
12072 case R_PPC64_GOT_TPREL16_HI:
12073 case R_PPC64_GOT_TPREL16_HA:
12074 tls_type = TLS_TLS | TLS_TPREL;
12075 goto dogot;
12076
12077 case R_PPC64_GOT_DTPREL16_DS:
12078 case R_PPC64_GOT_DTPREL16_LO_DS:
12079 case R_PPC64_GOT_DTPREL16_HI:
12080 case R_PPC64_GOT_DTPREL16_HA:
12081 tls_type = TLS_TLS | TLS_DTPREL;
12082 goto dogot;
12083
12084 case R_PPC64_GOT16:
12085 case R_PPC64_GOT16_LO:
12086 case R_PPC64_GOT16_HI:
12087 case R_PPC64_GOT16_HA:
12088 case R_PPC64_GOT16_DS:
12089 case R_PPC64_GOT16_LO_DS:
12090 dogot:
12091 {
12092 /* Relocation is to the entry for this symbol in the global
12093 offset table. */
12094 asection *got;
12095 bfd_vma *offp;
12096 bfd_vma off;
12097 unsigned long indx = 0;
12098 struct got_entry *ent;
12099
12100 if (tls_type == (TLS_TLS | TLS_LD)
12101 && (h == NULL
12102 || !h->elf.def_dynamic))
12103 ent = ppc64_tlsld_got (input_bfd);
12104 else
12105 {
12106
12107 if (h != NULL)
12108 {
12109 bfd_boolean dyn = htab->elf.dynamic_sections_created;
12110 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared,
12111 &h->elf)
12112 || (info->shared
12113 && SYMBOL_REFERENCES_LOCAL (info, &h->elf)))
12114 /* This is actually a static link, or it is a
12115 -Bsymbolic link and the symbol is defined
12116 locally, or the symbol was forced to be local
12117 because of a version file. */
12118 ;
12119 else
12120 {
12121 indx = h->elf.dynindx;
12122 unresolved_reloc = FALSE;
12123 }
12124 ent = h->elf.got.glist;
12125 }
12126 else
12127 {
12128 if (local_got_ents == NULL)
12129 abort ();
12130 ent = local_got_ents[r_symndx];
12131 }
12132
12133 for (; ent != NULL; ent = ent->next)
12134 if (ent->addend == orig_addend
12135 && ent->owner == input_bfd
12136 && ent->tls_type == tls_type)
12137 break;
12138 }
12139
12140 if (ent == NULL)
12141 abort ();
12142 if (ent->is_indirect)
12143 ent = ent->got.ent;
12144 offp = &ent->got.offset;
12145 got = ppc64_elf_tdata (ent->owner)->got;
12146 if (got == NULL)
12147 abort ();
12148
12149 /* The offset must always be a multiple of 8. We use the
12150 least significant bit to record whether we have already
12151 processed this entry. */
12152 off = *offp;
12153 if ((off & 1) != 0)
12154 off &= ~1;
12155 else
12156 {
12157 /* Generate relocs for the dynamic linker, except in
12158 the case of TLSLD where we'll use one entry per
12159 module. */
12160 asection *relgot;
12161 bfd_boolean ifunc;
12162
12163 *offp = off | 1;
12164 relgot = NULL;
12165 ifunc = (h != NULL
12166 ? h->elf.type == STT_GNU_IFUNC
12167 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC);
12168 if ((info->shared || indx != 0)
12169 && (h == NULL
12170 || (tls_type == (TLS_TLS | TLS_LD)
12171 && !h->elf.def_dynamic)
12172 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
12173 || h->elf.root.type != bfd_link_hash_undefweak))
12174 relgot = ppc64_elf_tdata (ent->owner)->relgot;
12175 else if (ifunc)
12176 relgot = htab->reliplt;
12177 if (relgot != NULL)
12178 {
12179 outrel.r_offset = (got->output_section->vma
12180 + got->output_offset
12181 + off);
12182 outrel.r_addend = addend;
12183 if (tls_type & (TLS_LD | TLS_GD))
12184 {
12185 outrel.r_addend = 0;
12186 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
12187 if (tls_type == (TLS_TLS | TLS_GD))
12188 {
12189 loc = relgot->contents;
12190 loc += (relgot->reloc_count++
12191 * sizeof (Elf64_External_Rela));
12192 bfd_elf64_swap_reloca_out (output_bfd,
12193 &outrel, loc);
12194 outrel.r_offset += 8;
12195 outrel.r_addend = addend;
12196 outrel.r_info
12197 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
12198 }
12199 }
12200 else if (tls_type == (TLS_TLS | TLS_DTPREL))
12201 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
12202 else if (tls_type == (TLS_TLS | TLS_TPREL))
12203 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
12204 else if (indx != 0)
12205 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
12206 else
12207 {
12208 if (ifunc)
12209 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
12210 else
12211 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
12212
12213 /* Write the .got section contents for the sake
12214 of prelink. */
12215 loc = got->contents + off;
12216 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
12217 loc);
12218 }
12219
12220 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
12221 {
12222 outrel.r_addend += relocation;
12223 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
12224 outrel.r_addend -= htab->elf.tls_sec->vma;
12225 }
12226 loc = relgot->contents;
12227 loc += (relgot->reloc_count++
12228 * sizeof (Elf64_External_Rela));
12229 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
12230 }
12231
12232 /* Init the .got section contents here if we're not
12233 emitting a reloc. */
12234 else
12235 {
12236 relocation += addend;
12237 if (tls_type == (TLS_TLS | TLS_LD))
12238 relocation = 1;
12239 else if (tls_type != 0)
12240 {
12241 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
12242 if (tls_type == (TLS_TLS | TLS_TPREL))
12243 relocation += DTP_OFFSET - TP_OFFSET;
12244
12245 if (tls_type == (TLS_TLS | TLS_GD))
12246 {
12247 bfd_put_64 (output_bfd, relocation,
12248 got->contents + off + 8);
12249 relocation = 1;
12250 }
12251 }
12252
12253 bfd_put_64 (output_bfd, relocation,
12254 got->contents + off);
12255 }
12256 }
12257
12258 if (off >= (bfd_vma) -2)
12259 abort ();
12260
12261 relocation = got->output_section->vma + got->output_offset + off;
12262 addend = -(TOCstart + htab->stub_group[input_section->id].toc_off);
12263 }
12264 break;
12265
12266 case R_PPC64_PLT16_HA:
12267 case R_PPC64_PLT16_HI:
12268 case R_PPC64_PLT16_LO:
12269 case R_PPC64_PLT32:
12270 case R_PPC64_PLT64:
12271 /* Relocation is to the entry for this symbol in the
12272 procedure linkage table. */
12273
12274 /* Resolve a PLT reloc against a local symbol directly,
12275 without using the procedure linkage table. */
12276 if (h == NULL)
12277 break;
12278
12279 /* It's possible that we didn't make a PLT entry for this
12280 symbol. This happens when statically linking PIC code,
12281 or when using -Bsymbolic. Go find a match if there is a
12282 PLT entry. */
12283 if (htab->plt != NULL)
12284 {
12285 struct plt_entry *ent;
12286 for (ent = h->elf.plt.plist; ent != NULL; ent = ent->next)
12287 if (ent->addend == orig_addend
12288 && ent->plt.offset != (bfd_vma) -1)
12289 {
12290 relocation = (htab->plt->output_section->vma
12291 + htab->plt->output_offset
12292 + ent->plt.offset);
12293 unresolved_reloc = FALSE;
12294 }
12295 }
12296 break;
12297
12298 case R_PPC64_TOC:
12299 /* Relocation value is TOC base. */
12300 relocation = TOCstart;
12301 if (r_symndx == 0)
12302 relocation += htab->stub_group[input_section->id].toc_off;
12303 else if (unresolved_reloc)
12304 ;
12305 else if (sec != NULL && sec->id <= htab->top_id)
12306 relocation += htab->stub_group[sec->id].toc_off;
12307 else
12308 unresolved_reloc = TRUE;
12309 goto dodyn;
12310
12311 /* TOC16 relocs. We want the offset relative to the TOC base,
12312 which is the address of the start of the TOC plus 0x8000.
12313 The TOC consists of sections .got, .toc, .tocbss, and .plt,
12314 in this order. */
12315 case R_PPC64_TOC16:
12316 case R_PPC64_TOC16_LO:
12317 case R_PPC64_TOC16_HI:
12318 case R_PPC64_TOC16_DS:
12319 case R_PPC64_TOC16_LO_DS:
12320 case R_PPC64_TOC16_HA:
12321 addend -= TOCstart + htab->stub_group[input_section->id].toc_off;
12322 break;
12323
12324 /* Relocate against the beginning of the section. */
12325 case R_PPC64_SECTOFF:
12326 case R_PPC64_SECTOFF_LO:
12327 case R_PPC64_SECTOFF_HI:
12328 case R_PPC64_SECTOFF_DS:
12329 case R_PPC64_SECTOFF_LO_DS:
12330 case R_PPC64_SECTOFF_HA:
12331 if (sec != NULL)
12332 addend -= sec->output_section->vma;
12333 break;
12334
12335 case R_PPC64_REL16:
12336 case R_PPC64_REL16_LO:
12337 case R_PPC64_REL16_HI:
12338 case R_PPC64_REL16_HA:
12339 break;
12340
12341 case R_PPC64_REL14:
12342 case R_PPC64_REL14_BRNTAKEN:
12343 case R_PPC64_REL14_BRTAKEN:
12344 case R_PPC64_REL24:
12345 break;
12346
12347 case R_PPC64_TPREL16:
12348 case R_PPC64_TPREL16_LO:
12349 case R_PPC64_TPREL16_HI:
12350 case R_PPC64_TPREL16_HA:
12351 case R_PPC64_TPREL16_DS:
12352 case R_PPC64_TPREL16_LO_DS:
12353 case R_PPC64_TPREL16_HIGHER:
12354 case R_PPC64_TPREL16_HIGHERA:
12355 case R_PPC64_TPREL16_HIGHEST:
12356 case R_PPC64_TPREL16_HIGHESTA:
12357 if (h != NULL
12358 && h->elf.root.type == bfd_link_hash_undefweak
12359 && h->elf.dynindx == -1)
12360 {
12361 /* Make this relocation against an undefined weak symbol
12362 resolve to zero. This is really just a tweak, since
12363 code using weak externs ought to check that they are
12364 defined before using them. */
12365 bfd_byte *p = contents + rel->r_offset - d_offset;
12366
12367 insn = bfd_get_32 (output_bfd, p);
12368 insn = _bfd_elf_ppc_at_tprel_transform (insn, 13);
12369 if (insn != 0)
12370 bfd_put_32 (output_bfd, insn, p);
12371 break;
12372 }
12373 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
12374 if (info->shared)
12375 /* The TPREL16 relocs shouldn't really be used in shared
12376 libs as they will result in DT_TEXTREL being set, but
12377 support them anyway. */
12378 goto dodyn;
12379 break;
12380
12381 case R_PPC64_DTPREL16:
12382 case R_PPC64_DTPREL16_LO:
12383 case R_PPC64_DTPREL16_HI:
12384 case R_PPC64_DTPREL16_HA:
12385 case R_PPC64_DTPREL16_DS:
12386 case R_PPC64_DTPREL16_LO_DS:
12387 case R_PPC64_DTPREL16_HIGHER:
12388 case R_PPC64_DTPREL16_HIGHERA:
12389 case R_PPC64_DTPREL16_HIGHEST:
12390 case R_PPC64_DTPREL16_HIGHESTA:
12391 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
12392 break;
12393
12394 case R_PPC64_DTPMOD64:
12395 relocation = 1;
12396 addend = 0;
12397 goto dodyn;
12398
12399 case R_PPC64_TPREL64:
12400 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
12401 goto dodyn;
12402
12403 case R_PPC64_DTPREL64:
12404 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
12405 /* Fall thru */
12406
12407 /* Relocations that may need to be propagated if this is a
12408 dynamic object. */
12409 case R_PPC64_REL30:
12410 case R_PPC64_REL32:
12411 case R_PPC64_REL64:
12412 case R_PPC64_ADDR14:
12413 case R_PPC64_ADDR14_BRNTAKEN:
12414 case R_PPC64_ADDR14_BRTAKEN:
12415 case R_PPC64_ADDR16:
12416 case R_PPC64_ADDR16_DS:
12417 case R_PPC64_ADDR16_HA:
12418 case R_PPC64_ADDR16_HI:
12419 case R_PPC64_ADDR16_HIGHER:
12420 case R_PPC64_ADDR16_HIGHERA:
12421 case R_PPC64_ADDR16_HIGHEST:
12422 case R_PPC64_ADDR16_HIGHESTA:
12423 case R_PPC64_ADDR16_LO:
12424 case R_PPC64_ADDR16_LO_DS:
12425 case R_PPC64_ADDR24:
12426 case R_PPC64_ADDR32:
12427 case R_PPC64_ADDR64:
12428 case R_PPC64_UADDR16:
12429 case R_PPC64_UADDR32:
12430 case R_PPC64_UADDR64:
12431 dodyn:
12432 if ((input_section->flags & SEC_ALLOC) == 0)
12433 break;
12434
12435 if (NO_OPD_RELOCS && is_opd)
12436 break;
12437
12438 if ((info->shared
12439 && (h == NULL
12440 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
12441 || h->elf.root.type != bfd_link_hash_undefweak)
12442 && (must_be_dyn_reloc (info, r_type)
12443 || !SYMBOL_CALLS_LOCAL (info, &h->elf)))
12444 || (ELIMINATE_COPY_RELOCS
12445 && !info->shared
12446 && h != NULL
12447 && h->elf.dynindx != -1
12448 && !h->elf.non_got_ref
12449 && !h->elf.def_regular)
12450 || (!info->shared
12451 && (h != NULL
12452 ? h->elf.type == STT_GNU_IFUNC
12453 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)))
12454 {
12455 bfd_boolean skip, relocate;
12456 asection *sreloc;
12457 bfd_vma out_off;
12458
12459 /* When generating a dynamic object, these relocations
12460 are copied into the output file to be resolved at run
12461 time. */
12462
12463 skip = FALSE;
12464 relocate = FALSE;
12465
12466 out_off = _bfd_elf_section_offset (output_bfd, info,
12467 input_section, rel->r_offset);
12468 if (out_off == (bfd_vma) -1)
12469 skip = TRUE;
12470 else if (out_off == (bfd_vma) -2)
12471 skip = TRUE, relocate = TRUE;
12472 out_off += (input_section->output_section->vma
12473 + input_section->output_offset);
12474 outrel.r_offset = out_off;
12475 outrel.r_addend = rel->r_addend;
12476
12477 /* Optimize unaligned reloc use. */
12478 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
12479 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
12480 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
12481 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
12482 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
12483 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
12484 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
12485 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
12486 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
12487
12488 if (skip)
12489 memset (&outrel, 0, sizeof outrel);
12490 else if (!SYMBOL_REFERENCES_LOCAL (info, &h->elf)
12491 && !is_opd
12492 && r_type != R_PPC64_TOC)
12493 outrel.r_info = ELF64_R_INFO (h->elf.dynindx, r_type);
12494 else
12495 {
12496 /* This symbol is local, or marked to become local,
12497 or this is an opd section reloc which must point
12498 at a local function. */
12499 outrel.r_addend += relocation;
12500 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
12501 {
12502 if (is_opd && h != NULL)
12503 {
12504 /* Lie about opd entries. This case occurs
12505 when building shared libraries and we
12506 reference a function in another shared
12507 lib. The same thing happens for a weak
12508 definition in an application that's
12509 overridden by a strong definition in a
12510 shared lib. (I believe this is a generic
12511 bug in binutils handling of weak syms.)
12512 In these cases we won't use the opd
12513 entry in this lib. */
12514 unresolved_reloc = FALSE;
12515 }
12516 if (!is_opd
12517 && r_type == R_PPC64_ADDR64
12518 && (h != NULL
12519 ? h->elf.type == STT_GNU_IFUNC
12520 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
12521 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
12522 else
12523 {
12524 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
12525
12526 /* We need to relocate .opd contents for ld.so.
12527 Prelink also wants simple and consistent rules
12528 for relocs. This make all RELATIVE relocs have
12529 *r_offset equal to r_addend. */
12530 relocate = TRUE;
12531 }
12532 }
12533 else
12534 {
12535 long indx = 0;
12536
12537 if (h != NULL
12538 ? h->elf.type == STT_GNU_IFUNC
12539 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
12540 {
12541 (*_bfd_error_handler)
12542 (_("%B(%A+0x%lx): relocation %s for indirect "
12543 "function %s unsupported"),
12544 input_bfd,
12545 input_section,
12546 (long) rel->r_offset,
12547 ppc64_elf_howto_table[r_type]->name,
12548 sym_name);
12549 ret = FALSE;
12550 }
12551 else if (r_symndx == 0 || bfd_is_abs_section (sec))
12552 ;
12553 else if (sec == NULL || sec->owner == NULL)
12554 {
12555 bfd_set_error (bfd_error_bad_value);
12556 return FALSE;
12557 }
12558 else
12559 {
12560 asection *osec;
12561
12562 osec = sec->output_section;
12563 indx = elf_section_data (osec)->dynindx;
12564
12565 if (indx == 0)
12566 {
12567 if ((osec->flags & SEC_READONLY) == 0
12568 && htab->elf.data_index_section != NULL)
12569 osec = htab->elf.data_index_section;
12570 else
12571 osec = htab->elf.text_index_section;
12572 indx = elf_section_data (osec)->dynindx;
12573 }
12574 BFD_ASSERT (indx != 0);
12575
12576 /* We are turning this relocation into one
12577 against a section symbol, so subtract out
12578 the output section's address but not the
12579 offset of the input section in the output
12580 section. */
12581 outrel.r_addend -= osec->vma;
12582 }
12583
12584 outrel.r_info = ELF64_R_INFO (indx, r_type);
12585 }
12586 }
12587
12588 sreloc = elf_section_data (input_section)->sreloc;
12589 if (!htab->elf.dynamic_sections_created)
12590 sreloc = htab->reliplt;
12591 if (sreloc == NULL)
12592 abort ();
12593
12594 if (sreloc->reloc_count * sizeof (Elf64_External_Rela)
12595 >= sreloc->size)
12596 abort ();
12597 loc = sreloc->contents;
12598 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
12599 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
12600
12601 /* If this reloc is against an external symbol, it will
12602 be computed at runtime, so there's no need to do
12603 anything now. However, for the sake of prelink ensure
12604 that the section contents are a known value. */
12605 if (! relocate)
12606 {
12607 unresolved_reloc = FALSE;
12608 /* The value chosen here is quite arbitrary as ld.so
12609 ignores section contents except for the special
12610 case of .opd where the contents might be accessed
12611 before relocation. Choose zero, as that won't
12612 cause reloc overflow. */
12613 relocation = 0;
12614 addend = 0;
12615 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
12616 to improve backward compatibility with older
12617 versions of ld. */
12618 if (r_type == R_PPC64_ADDR64)
12619 addend = outrel.r_addend;
12620 /* Adjust pc_relative relocs to have zero in *r_offset. */
12621 else if (ppc64_elf_howto_table[r_type]->pc_relative)
12622 addend = (input_section->output_section->vma
12623 + input_section->output_offset
12624 + rel->r_offset);
12625 }
12626 }
12627 break;
12628
12629 case R_PPC64_COPY:
12630 case R_PPC64_GLOB_DAT:
12631 case R_PPC64_JMP_SLOT:
12632 case R_PPC64_JMP_IREL:
12633 case R_PPC64_RELATIVE:
12634 /* We shouldn't ever see these dynamic relocs in relocatable
12635 files. */
12636 /* Fall through. */
12637
12638 case R_PPC64_PLTGOT16:
12639 case R_PPC64_PLTGOT16_DS:
12640 case R_PPC64_PLTGOT16_HA:
12641 case R_PPC64_PLTGOT16_HI:
12642 case R_PPC64_PLTGOT16_LO:
12643 case R_PPC64_PLTGOT16_LO_DS:
12644 case R_PPC64_PLTREL32:
12645 case R_PPC64_PLTREL64:
12646 /* These ones haven't been implemented yet. */
12647
12648 (*_bfd_error_handler)
12649 (_("%B: relocation %s is not supported for symbol %s."),
12650 input_bfd,
12651 ppc64_elf_howto_table[r_type]->name, sym_name);
12652
12653 bfd_set_error (bfd_error_invalid_operation);
12654 ret = FALSE;
12655 continue;
12656 }
12657
12658 /* Do any further special processing. */
12659 switch (r_type)
12660 {
12661 default:
12662 break;
12663
12664 case R_PPC64_ADDR16_HA:
12665 case R_PPC64_REL16_HA:
12666 case R_PPC64_ADDR16_HIGHERA:
12667 case R_PPC64_ADDR16_HIGHESTA:
12668 case R_PPC64_TOC16_HA:
12669 case R_PPC64_SECTOFF_HA:
12670 case R_PPC64_TPREL16_HA:
12671 case R_PPC64_DTPREL16_HA:
12672 case R_PPC64_TPREL16_HIGHER:
12673 case R_PPC64_TPREL16_HIGHERA:
12674 case R_PPC64_TPREL16_HIGHEST:
12675 case R_PPC64_TPREL16_HIGHESTA:
12676 case R_PPC64_DTPREL16_HIGHER:
12677 case R_PPC64_DTPREL16_HIGHERA:
12678 case R_PPC64_DTPREL16_HIGHEST:
12679 case R_PPC64_DTPREL16_HIGHESTA:
12680 /* It's just possible that this symbol is a weak symbol
12681 that's not actually defined anywhere. In that case,
12682 'sec' would be NULL, and we should leave the symbol
12683 alone (it will be set to zero elsewhere in the link). */
12684 if (sec == NULL)
12685 break;
12686 /* Fall thru */
12687
12688 case R_PPC64_GOT16_HA:
12689 case R_PPC64_PLTGOT16_HA:
12690 case R_PPC64_PLT16_HA:
12691 case R_PPC64_GOT_TLSGD16_HA:
12692 case R_PPC64_GOT_TLSLD16_HA:
12693 case R_PPC64_GOT_TPREL16_HA:
12694 case R_PPC64_GOT_DTPREL16_HA:
12695 /* Add 0x10000 if sign bit in 0:15 is set.
12696 Bits 0:15 are not used. */
12697 addend += 0x8000;
12698 break;
12699
12700 case R_PPC64_ADDR16_DS:
12701 case R_PPC64_ADDR16_LO_DS:
12702 case R_PPC64_GOT16_DS:
12703 case R_PPC64_GOT16_LO_DS:
12704 case R_PPC64_PLT16_LO_DS:
12705 case R_PPC64_SECTOFF_DS:
12706 case R_PPC64_SECTOFF_LO_DS:
12707 case R_PPC64_TOC16_DS:
12708 case R_PPC64_TOC16_LO_DS:
12709 case R_PPC64_PLTGOT16_DS:
12710 case R_PPC64_PLTGOT16_LO_DS:
12711 case R_PPC64_GOT_TPREL16_DS:
12712 case R_PPC64_GOT_TPREL16_LO_DS:
12713 case R_PPC64_GOT_DTPREL16_DS:
12714 case R_PPC64_GOT_DTPREL16_LO_DS:
12715 case R_PPC64_TPREL16_DS:
12716 case R_PPC64_TPREL16_LO_DS:
12717 case R_PPC64_DTPREL16_DS:
12718 case R_PPC64_DTPREL16_LO_DS:
12719 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
12720 mask = 3;
12721 /* If this reloc is against an lq insn, then the value must be
12722 a multiple of 16. This is somewhat of a hack, but the
12723 "correct" way to do this by defining _DQ forms of all the
12724 _DS relocs bloats all reloc switches in this file. It
12725 doesn't seem to make much sense to use any of these relocs
12726 in data, so testing the insn should be safe. */
12727 if ((insn & (0x3f << 26)) == (56u << 26))
12728 mask = 15;
12729 if (((relocation + addend) & mask) != 0)
12730 {
12731 (*_bfd_error_handler)
12732 (_("%B: error: relocation %s not a multiple of %d"),
12733 input_bfd,
12734 ppc64_elf_howto_table[r_type]->name,
12735 mask + 1);
12736 bfd_set_error (bfd_error_bad_value);
12737 ret = FALSE;
12738 continue;
12739 }
12740 break;
12741 }
12742
12743 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
12744 because such sections are not SEC_ALLOC and thus ld.so will
12745 not process them. */
12746 if (unresolved_reloc
12747 && !((input_section->flags & SEC_DEBUGGING) != 0
12748 && h->elf.def_dynamic))
12749 {
12750 (*_bfd_error_handler)
12751 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
12752 input_bfd,
12753 input_section,
12754 (long) rel->r_offset,
12755 ppc64_elf_howto_table[(int) r_type]->name,
12756 h->elf.root.root.string);
12757 ret = FALSE;
12758 }
12759
12760 r = _bfd_final_link_relocate (ppc64_elf_howto_table[(int) r_type],
12761 input_bfd,
12762 input_section,
12763 contents,
12764 rel->r_offset,
12765 relocation,
12766 addend);
12767
12768 if (r != bfd_reloc_ok)
12769 {
12770 if (sym_name == NULL)
12771 sym_name = "(null)";
12772 if (r == bfd_reloc_overflow)
12773 {
12774 if (warned)
12775 continue;
12776 if (h != NULL
12777 && h->elf.root.type == bfd_link_hash_undefweak
12778 && ppc64_elf_howto_table[r_type]->pc_relative)
12779 {
12780 /* Assume this is a call protected by other code that
12781 detects the symbol is undefined. If this is the case,
12782 we can safely ignore the overflow. If not, the
12783 program is hosed anyway, and a little warning isn't
12784 going to help. */
12785
12786 continue;
12787 }
12788
12789 if (!((*info->callbacks->reloc_overflow)
12790 (info, (h ? &h->elf.root : NULL), sym_name,
12791 ppc64_elf_howto_table[r_type]->name,
12792 orig_addend, input_bfd, input_section, rel->r_offset)))
12793 return FALSE;
12794 }
12795 else
12796 {
12797 (*_bfd_error_handler)
12798 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
12799 input_bfd,
12800 input_section,
12801 (long) rel->r_offset,
12802 ppc64_elf_howto_table[r_type]->name,
12803 sym_name,
12804 (int) r);
12805 ret = FALSE;
12806 }
12807 }
12808 }
12809
12810 /* If we're emitting relocations, then shortly after this function
12811 returns, reloc offsets and addends for this section will be
12812 adjusted. Worse, reloc symbol indices will be for the output
12813 file rather than the input. Save a copy of the relocs for
12814 opd_entry_value. */
12815 if (is_opd && (info->emitrelocations || info->relocatable))
12816 {
12817 bfd_size_type amt;
12818 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
12819 rel = bfd_alloc (input_bfd, amt);
12820 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd_relocs == NULL);
12821 ppc64_elf_tdata (input_bfd)->opd_relocs = rel;
12822 if (rel == NULL)
12823 return FALSE;
12824 memcpy (rel, relocs, amt);
12825 }
12826 return ret;
12827 }
12828
12829 /* Adjust the value of any local symbols in opd sections. */
12830
12831 static int
12832 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
12833 const char *name ATTRIBUTE_UNUSED,
12834 Elf_Internal_Sym *elfsym,
12835 asection *input_sec,
12836 struct elf_link_hash_entry *h)
12837 {
12838 struct _opd_sec_data *opd;
12839 long adjust;
12840 bfd_vma value;
12841
12842 if (h != NULL)
12843 return 1;
12844
12845 opd = get_opd_info (input_sec);
12846 if (opd == NULL || opd->adjust == NULL)
12847 return 1;
12848
12849 value = elfsym->st_value - input_sec->output_offset;
12850 if (!info->relocatable)
12851 value -= input_sec->output_section->vma;
12852
12853 adjust = opd->adjust[value / 8];
12854 if (adjust == -1)
12855 return 2;
12856
12857 elfsym->st_value += adjust;
12858 return 1;
12859 }
12860
12861 /* Finish up dynamic symbol handling. We set the contents of various
12862 dynamic sections here. */
12863
12864 static bfd_boolean
12865 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
12866 struct bfd_link_info *info,
12867 struct elf_link_hash_entry *h,
12868 Elf_Internal_Sym *sym)
12869 {
12870 struct ppc_link_hash_table *htab;
12871 struct plt_entry *ent;
12872 Elf_Internal_Rela rela;
12873 bfd_byte *loc;
12874
12875 htab = ppc_hash_table (info);
12876 if (htab == NULL)
12877 return FALSE;
12878
12879 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
12880 if (ent->plt.offset != (bfd_vma) -1)
12881 {
12882 /* This symbol has an entry in the procedure linkage
12883 table. Set it up. */
12884 if (!htab->elf.dynamic_sections_created
12885 || h->dynindx == -1)
12886 {
12887 BFD_ASSERT (h->type == STT_GNU_IFUNC
12888 && h->def_regular
12889 && (h->root.type == bfd_link_hash_defined
12890 || h->root.type == bfd_link_hash_defweak));
12891 rela.r_offset = (htab->iplt->output_section->vma
12892 + htab->iplt->output_offset
12893 + ent->plt.offset);
12894 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
12895 rela.r_addend = (h->root.u.def.value
12896 + h->root.u.def.section->output_offset
12897 + h->root.u.def.section->output_section->vma
12898 + ent->addend);
12899 loc = (htab->reliplt->contents
12900 + (htab->reliplt->reloc_count++
12901 * sizeof (Elf64_External_Rela)));
12902 }
12903 else
12904 {
12905 rela.r_offset = (htab->plt->output_section->vma
12906 + htab->plt->output_offset
12907 + ent->plt.offset);
12908 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
12909 rela.r_addend = ent->addend;
12910 loc = (htab->relplt->contents
12911 + ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE)
12912 / (PLT_ENTRY_SIZE / sizeof (Elf64_External_Rela))));
12913 }
12914 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
12915 }
12916
12917 if (h->needs_copy)
12918 {
12919 /* This symbol needs a copy reloc. Set it up. */
12920
12921 if (h->dynindx == -1
12922 || (h->root.type != bfd_link_hash_defined
12923 && h->root.type != bfd_link_hash_defweak)
12924 || htab->relbss == NULL)
12925 abort ();
12926
12927 rela.r_offset = (h->root.u.def.value
12928 + h->root.u.def.section->output_section->vma
12929 + h->root.u.def.section->output_offset);
12930 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
12931 rela.r_addend = 0;
12932 loc = htab->relbss->contents;
12933 loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela);
12934 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
12935 }
12936
12937 /* Mark some specially defined symbols as absolute. */
12938 if (strcmp (h->root.root.string, "_DYNAMIC") == 0)
12939 sym->st_shndx = SHN_ABS;
12940
12941 return TRUE;
12942 }
12943
12944 /* Used to decide how to sort relocs in an optimal manner for the
12945 dynamic linker, before writing them out. */
12946
12947 static enum elf_reloc_type_class
12948 ppc64_elf_reloc_type_class (const Elf_Internal_Rela *rela)
12949 {
12950 enum elf_ppc64_reloc_type r_type;
12951
12952 r_type = ELF64_R_TYPE (rela->r_info);
12953 switch (r_type)
12954 {
12955 case R_PPC64_RELATIVE:
12956 return reloc_class_relative;
12957 case R_PPC64_JMP_SLOT:
12958 return reloc_class_plt;
12959 case R_PPC64_COPY:
12960 return reloc_class_copy;
12961 default:
12962 return reloc_class_normal;
12963 }
12964 }
12965
12966 /* Finish up the dynamic sections. */
12967
12968 static bfd_boolean
12969 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
12970 struct bfd_link_info *info)
12971 {
12972 struct ppc_link_hash_table *htab;
12973 bfd *dynobj;
12974 asection *sdyn;
12975
12976 htab = ppc_hash_table (info);
12977 if (htab == NULL)
12978 return FALSE;
12979
12980 dynobj = htab->elf.dynobj;
12981 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
12982
12983 if (htab->elf.dynamic_sections_created)
12984 {
12985 Elf64_External_Dyn *dyncon, *dynconend;
12986
12987 if (sdyn == NULL || htab->got == NULL)
12988 abort ();
12989
12990 dyncon = (Elf64_External_Dyn *) sdyn->contents;
12991 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
12992 for (; dyncon < dynconend; dyncon++)
12993 {
12994 Elf_Internal_Dyn dyn;
12995 asection *s;
12996
12997 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
12998
12999 switch (dyn.d_tag)
13000 {
13001 default:
13002 continue;
13003
13004 case DT_PPC64_GLINK:
13005 s = htab->glink;
13006 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
13007 /* We stupidly defined DT_PPC64_GLINK to be the start
13008 of glink rather than the first entry point, which is
13009 what ld.so needs, and now have a bigger stub to
13010 support automatic multiple TOCs. */
13011 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 32;
13012 break;
13013
13014 case DT_PPC64_OPD:
13015 s = bfd_get_section_by_name (output_bfd, ".opd");
13016 if (s == NULL)
13017 continue;
13018 dyn.d_un.d_ptr = s->vma;
13019 break;
13020
13021 case DT_PPC64_OPDSZ:
13022 s = bfd_get_section_by_name (output_bfd, ".opd");
13023 if (s == NULL)
13024 continue;
13025 dyn.d_un.d_val = s->size;
13026 break;
13027
13028 case DT_PLTGOT:
13029 s = htab->plt;
13030 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
13031 break;
13032
13033 case DT_JMPREL:
13034 s = htab->relplt;
13035 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
13036 break;
13037
13038 case DT_PLTRELSZ:
13039 dyn.d_un.d_val = htab->relplt->size;
13040 break;
13041
13042 case DT_RELASZ:
13043 /* Don't count procedure linkage table relocs in the
13044 overall reloc count. */
13045 s = htab->relplt;
13046 if (s == NULL)
13047 continue;
13048 dyn.d_un.d_val -= s->size;
13049 break;
13050
13051 case DT_RELA:
13052 /* We may not be using the standard ELF linker script.
13053 If .rela.plt is the first .rela section, we adjust
13054 DT_RELA to not include it. */
13055 s = htab->relplt;
13056 if (s == NULL)
13057 continue;
13058 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
13059 continue;
13060 dyn.d_un.d_ptr += s->size;
13061 break;
13062 }
13063
13064 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
13065 }
13066 }
13067
13068 if (htab->got != NULL && htab->got->size != 0)
13069 {
13070 /* Fill in the first entry in the global offset table.
13071 We use it to hold the link-time TOCbase. */
13072 bfd_put_64 (output_bfd,
13073 elf_gp (output_bfd) + TOC_BASE_OFF,
13074 htab->got->contents);
13075
13076 /* Set .got entry size. */
13077 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 8;
13078 }
13079
13080 if (htab->plt != NULL && htab->plt->size != 0)
13081 {
13082 /* Set .plt entry size. */
13083 elf_section_data (htab->plt->output_section)->this_hdr.sh_entsize
13084 = PLT_ENTRY_SIZE;
13085 }
13086
13087 /* brlt is SEC_LINKER_CREATED, so we need to write out relocs for
13088 brlt ourselves if emitrelocations. */
13089 if (htab->brlt != NULL
13090 && htab->brlt->reloc_count != 0
13091 && !_bfd_elf_link_output_relocs (output_bfd,
13092 htab->brlt,
13093 &elf_section_data (htab->brlt)->rel_hdr,
13094 elf_section_data (htab->brlt)->relocs,
13095 NULL))
13096 return FALSE;
13097
13098 if (htab->glink != NULL
13099 && htab->glink->reloc_count != 0
13100 && !_bfd_elf_link_output_relocs (output_bfd,
13101 htab->glink,
13102 &elf_section_data (htab->glink)->rel_hdr,
13103 elf_section_data (htab->glink)->relocs,
13104 NULL))
13105 return FALSE;
13106
13107 /* We need to handle writing out multiple GOT sections ourselves,
13108 since we didn't add them to DYNOBJ. We know dynobj is the first
13109 bfd. */
13110 while ((dynobj = dynobj->link_next) != NULL)
13111 {
13112 asection *s;
13113
13114 if (!is_ppc64_elf (dynobj))
13115 continue;
13116
13117 s = ppc64_elf_tdata (dynobj)->got;
13118 if (s != NULL
13119 && s->size != 0
13120 && s->output_section != bfd_abs_section_ptr
13121 && !bfd_set_section_contents (output_bfd, s->output_section,
13122 s->contents, s->output_offset,
13123 s->size))
13124 return FALSE;
13125 s = ppc64_elf_tdata (dynobj)->relgot;
13126 if (s != NULL
13127 && s->size != 0
13128 && s->output_section != bfd_abs_section_ptr
13129 && !bfd_set_section_contents (output_bfd, s->output_section,
13130 s->contents, s->output_offset,
13131 s->size))
13132 return FALSE;
13133 }
13134
13135 return TRUE;
13136 }
13137
13138 #include "elf64-target.h"
GDB Binutils - Deliverables
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