?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
2009-12-28 Daniel Gutson <dgutson@codesourcery.com>
[binutils.git] / bfd / elf64-ppc.c
bloba940dab31e345486ed9296496388270f042298f2
1 /* PowerPC64-specific support for 64-bit ELF.
2 Copyright 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008,
3 2009 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 struct ppc64_elf_obj_tdata
2530 {
2531 struct elf_obj_tdata elf;
2532
2533 /* Shortcuts to dynamic linker sections. */
2534 asection *got;
2535 asection *relgot;
2536
2537 /* Used during garbage collection. We attach global symbols defined
2538 on removed .opd entries to this section so that the sym is removed. */
2539 asection *deleted_section;
2540
2541 /* TLS local dynamic got entry handling. Suppose for multiple GOT
2542 sections means we potentially need one of these for each input bfd. */
2543 union {
2544 bfd_signed_vma refcount;
2545 bfd_vma offset;
2546 } tlsld_got;
2547
2548 /* A copy of relocs before they are modified for --emit-relocs. */
2549 Elf_Internal_Rela *opd_relocs;
2550 };
2551
2552 #define ppc64_elf_tdata(bfd) \
2553 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
2554
2555 #define ppc64_tlsld_got(bfd) \
2556 (&ppc64_elf_tdata (bfd)->tlsld_got)
2557
2558 #define is_ppc64_elf(bfd) \
2559 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2560 && elf_object_id (bfd) == PPC64_ELF_TDATA)
2561
2562 /* Override the generic function because we store some extras. */
2563
2564 static bfd_boolean
2565 ppc64_elf_mkobject (bfd *abfd)
2566 {
2567 return bfd_elf_allocate_object (abfd, sizeof (struct ppc64_elf_obj_tdata),
2568 PPC64_ELF_TDATA);
2569 }
2570
2571 /* Fix bad default arch selected for a 64 bit input bfd when the
2572 default is 32 bit. */
2573
2574 static bfd_boolean
2575 ppc64_elf_object_p (bfd *abfd)
2576 {
2577 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 32)
2578 {
2579 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2580
2581 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2582 {
2583 /* Relies on arch after 32 bit default being 64 bit default. */
2584 abfd->arch_info = abfd->arch_info->next;
2585 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2586 }
2587 }
2588 return TRUE;
2589 }
2590
2591 /* Support for core dump NOTE sections. */
2592
2593 static bfd_boolean
2594 ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2595 {
2596 size_t offset, size;
2597
2598 if (note->descsz != 504)
2599 return FALSE;
2600
2601 /* pr_cursig */
2602 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
2603
2604 /* pr_pid */
2605 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 32);
2606
2607 /* pr_reg */
2608 offset = 112;
2609 size = 384;
2610
2611 /* Make a ".reg/999" section. */
2612 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2613 size, note->descpos + offset);
2614 }
2615
2616 static bfd_boolean
2617 ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2618 {
2619 if (note->descsz != 136)
2620 return FALSE;
2621
2622 elf_tdata (abfd)->core_program
2623 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
2624 elf_tdata (abfd)->core_command
2625 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
2626
2627 return TRUE;
2628 }
2629
2630 static char *
2631 ppc64_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type,
2632 ...)
2633 {
2634 switch (note_type)
2635 {
2636 default:
2637 return NULL;
2638
2639 case NT_PRPSINFO:
2640 {
2641 char data[136];
2642 va_list ap;
2643
2644 va_start (ap, note_type);
2645 memset (data, 0, 40);
2646 strncpy (data + 40, va_arg (ap, const char *), 16);
2647 strncpy (data + 56, va_arg (ap, const char *), 80);
2648 va_end (ap);
2649 return elfcore_write_note (abfd, buf, bufsiz,
2650 "CORE", note_type, data, sizeof (data));
2651 }
2652
2653 case NT_PRSTATUS:
2654 {
2655 char data[504];
2656 va_list ap;
2657 long pid;
2658 int cursig;
2659 const void *greg;
2660
2661 va_start (ap, note_type);
2662 memset (data, 0, 112);
2663 pid = va_arg (ap, long);
2664 bfd_put_32 (abfd, pid, data + 32);
2665 cursig = va_arg (ap, int);
2666 bfd_put_16 (abfd, cursig, data + 12);
2667 greg = va_arg (ap, const void *);
2668 memcpy (data + 112, greg, 384);
2669 memset (data + 496, 0, 8);
2670 va_end (ap);
2671 return elfcore_write_note (abfd, buf, bufsiz,
2672 "CORE", note_type, data, sizeof (data));
2673 }
2674 }
2675 }
2676
2677 /* Merge backend specific data from an object file to the output
2678 object file when linking. */
2679
2680 static bfd_boolean
2681 ppc64_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
2682 {
2683 /* Check if we have the same endianess. */
2684 if (ibfd->xvec->byteorder != obfd->xvec->byteorder
2685 && ibfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN
2686 && obfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN)
2687 {
2688 const char *msg;
2689
2690 if (bfd_big_endian (ibfd))
2691 msg = _("%B: compiled for a big endian system "
2692 "and target is little endian");
2693 else
2694 msg = _("%B: compiled for a little endian system "
2695 "and target is big endian");
2696
2697 (*_bfd_error_handler) (msg, ibfd);
2698
2699 bfd_set_error (bfd_error_wrong_format);
2700 return FALSE;
2701 }
2702
2703 return TRUE;
2704 }
2705
2706 /* Add extra PPC sections. */
2707
2708 static const struct bfd_elf_special_section ppc64_elf_special_sections[]=
2709 {
2710 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, 0 },
2711 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2712 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2713 { STRING_COMMA_LEN (".toc"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2714 { STRING_COMMA_LEN (".toc1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2715 { STRING_COMMA_LEN (".tocbss"), 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2716 { NULL, 0, 0, 0, 0 }
2717 };
2718
2719 enum _ppc64_sec_type {
2720 sec_normal = 0,
2721 sec_opd = 1,
2722 sec_toc = 2
2723 };
2724
2725 struct _ppc64_elf_section_data
2726 {
2727 struct bfd_elf_section_data elf;
2728
2729 union
2730 {
2731 /* An array with one entry for each opd function descriptor. */
2732 struct _opd_sec_data
2733 {
2734 /* Points to the function code section for local opd entries. */
2735 asection **func_sec;
2736
2737 /* After editing .opd, adjust references to opd local syms. */
2738 long *adjust;
2739 } opd;
2740
2741 /* An array for toc sections, indexed by offset/8. */
2742 struct _toc_sec_data
2743 {
2744 /* Specifies the relocation symbol index used at a given toc offset. */
2745 unsigned *symndx;
2746
2747 /* And the relocation addend. */
2748 bfd_vma *add;
2749 } toc;
2750 } u;
2751
2752 enum _ppc64_sec_type sec_type:2;
2753
2754 /* Flag set when small branches are detected. Used to
2755 select suitable defaults for the stub group size. */
2756 unsigned int has_14bit_branch:1;
2757 };
2758
2759 #define ppc64_elf_section_data(sec) \
2760 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
2761
2762 static bfd_boolean
2763 ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
2764 {
2765 if (!sec->used_by_bfd)
2766 {
2767 struct _ppc64_elf_section_data *sdata;
2768 bfd_size_type amt = sizeof (*sdata);
2769
2770 sdata = bfd_zalloc (abfd, amt);
2771 if (sdata == NULL)
2772 return FALSE;
2773 sec->used_by_bfd = sdata;
2774 }
2775
2776 return _bfd_elf_new_section_hook (abfd, sec);
2777 }
2778
2779 static struct _opd_sec_data *
2780 get_opd_info (asection * sec)
2781 {
2782 if (sec != NULL
2783 && ppc64_elf_section_data (sec) != NULL
2784 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
2785 return &ppc64_elf_section_data (sec)->u.opd;
2786 return NULL;
2787 }
2788 \f
2789 /* Parameters for the qsort hook. */
2790 static bfd_boolean synthetic_relocatable;
2791
2792 /* qsort comparison function for ppc64_elf_get_synthetic_symtab. */
2793
2794 static int
2795 compare_symbols (const void *ap, const void *bp)
2796 {
2797 const asymbol *a = * (const asymbol **) ap;
2798 const asymbol *b = * (const asymbol **) bp;
2799
2800 /* Section symbols first. */
2801 if ((a->flags & BSF_SECTION_SYM) && !(b->flags & BSF_SECTION_SYM))
2802 return -1;
2803 if (!(a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM))
2804 return 1;
2805
2806 /* then .opd symbols. */
2807 if (strcmp (a->section->name, ".opd") == 0
2808 && strcmp (b->section->name, ".opd") != 0)
2809 return -1;
2810 if (strcmp (a->section->name, ".opd") != 0
2811 && strcmp (b->section->name, ".opd") == 0)
2812 return 1;
2813
2814 /* then other code symbols. */
2815 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2816 == (SEC_CODE | SEC_ALLOC)
2817 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2818 != (SEC_CODE | SEC_ALLOC))
2819 return -1;
2820
2821 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2822 != (SEC_CODE | SEC_ALLOC)
2823 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2824 == (SEC_CODE | SEC_ALLOC))
2825 return 1;
2826
2827 if (synthetic_relocatable)
2828 {
2829 if (a->section->id < b->section->id)
2830 return -1;
2831
2832 if (a->section->id > b->section->id)
2833 return 1;
2834 }
2835
2836 if (a->value + a->section->vma < b->value + b->section->vma)
2837 return -1;
2838
2839 if (a->value + a->section->vma > b->value + b->section->vma)
2840 return 1;
2841
2842 /* For syms with the same value, prefer strong dynamic global function
2843 syms over other syms. */
2844 if ((a->flags & BSF_GLOBAL) != 0 && (b->flags & BSF_GLOBAL) == 0)
2845 return -1;
2846
2847 if ((a->flags & BSF_GLOBAL) == 0 && (b->flags & BSF_GLOBAL) != 0)
2848 return 1;
2849
2850 if ((a->flags & BSF_FUNCTION) != 0 && (b->flags & BSF_FUNCTION) == 0)
2851 return -1;
2852
2853 if ((a->flags & BSF_FUNCTION) == 0 && (b->flags & BSF_FUNCTION) != 0)
2854 return 1;
2855
2856 if ((a->flags & BSF_WEAK) == 0 && (b->flags & BSF_WEAK) != 0)
2857 return -1;
2858
2859 if ((a->flags & BSF_WEAK) != 0 && (b->flags & BSF_WEAK) == 0)
2860 return 1;
2861
2862 if ((a->flags & BSF_DYNAMIC) != 0 && (b->flags & BSF_DYNAMIC) == 0)
2863 return -1;
2864
2865 if ((a->flags & BSF_DYNAMIC) == 0 && (b->flags & BSF_DYNAMIC) != 0)
2866 return 1;
2867
2868 return 0;
2869 }
2870
2871 /* Search SYMS for a symbol of the given VALUE. */
2872
2873 static asymbol *
2874 sym_exists_at (asymbol **syms, long lo, long hi, int id, bfd_vma value)
2875 {
2876 long mid;
2877
2878 if (id == -1)
2879 {
2880 while (lo < hi)
2881 {
2882 mid = (lo + hi) >> 1;
2883 if (syms[mid]->value + syms[mid]->section->vma < value)
2884 lo = mid + 1;
2885 else if (syms[mid]->value + syms[mid]->section->vma > value)
2886 hi = mid;
2887 else
2888 return syms[mid];
2889 }
2890 }
2891 else
2892 {
2893 while (lo < hi)
2894 {
2895 mid = (lo + hi) >> 1;
2896 if (syms[mid]->section->id < id)
2897 lo = mid + 1;
2898 else if (syms[mid]->section->id > id)
2899 hi = mid;
2900 else if (syms[mid]->value < value)
2901 lo = mid + 1;
2902 else if (syms[mid]->value > value)
2903 hi = mid;
2904 else
2905 return syms[mid];
2906 }
2907 }
2908 return NULL;
2909 }
2910
2911 static bfd_boolean
2912 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
2913 {
2914 bfd_vma vma = *(bfd_vma *) ptr;
2915 return ((section->flags & SEC_ALLOC) != 0
2916 && section->vma <= vma
2917 && vma < section->vma + section->size);
2918 }
2919
2920 /* Create synthetic symbols, effectively restoring "dot-symbol" function
2921 entry syms. Also generate @plt symbols for the glink branch table. */
2922
2923 static long
2924 ppc64_elf_get_synthetic_symtab (bfd *abfd,
2925 long static_count, asymbol **static_syms,
2926 long dyn_count, asymbol **dyn_syms,
2927 asymbol **ret)
2928 {
2929 asymbol *s;
2930 long i;
2931 long count;
2932 char *names;
2933 long symcount, codesecsym, codesecsymend, secsymend, opdsymend;
2934 asection *opd;
2935 bfd_boolean relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0;
2936 asymbol **syms;
2937
2938 *ret = NULL;
2939
2940 opd = bfd_get_section_by_name (abfd, ".opd");
2941 if (opd == NULL)
2942 return 0;
2943
2944 symcount = static_count;
2945 if (!relocatable)
2946 symcount += dyn_count;
2947 if (symcount == 0)
2948 return 0;
2949
2950 syms = bfd_malloc ((symcount + 1) * sizeof (*syms));
2951 if (syms == NULL)
2952 return -1;
2953
2954 if (!relocatable && static_count != 0 && dyn_count != 0)
2955 {
2956 /* Use both symbol tables. */
2957 memcpy (syms, static_syms, static_count * sizeof (*syms));
2958 memcpy (syms + static_count, dyn_syms, (dyn_count + 1) * sizeof (*syms));
2959 }
2960 else if (!relocatable && static_count == 0)
2961 memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms));
2962 else
2963 memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms));
2964
2965 synthetic_relocatable = relocatable;
2966 qsort (syms, symcount, sizeof (*syms), compare_symbols);
2967
2968 if (!relocatable && symcount > 1)
2969 {
2970 long j;
2971 /* Trim duplicate syms, since we may have merged the normal and
2972 dynamic symbols. Actually, we only care about syms that have
2973 different values, so trim any with the same value. */
2974 for (i = 1, j = 1; i < symcount; ++i)
2975 if (syms[i - 1]->value + syms[i - 1]->section->vma
2976 != syms[i]->value + syms[i]->section->vma)
2977 syms[j++] = syms[i];
2978 symcount = j;
2979 }
2980
2981 i = 0;
2982 if (strcmp (syms[i]->section->name, ".opd") == 0)
2983 ++i;
2984 codesecsym = i;
2985
2986 for (; i < symcount; ++i)
2987 if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2988 != (SEC_CODE | SEC_ALLOC))
2989 || (syms[i]->flags & BSF_SECTION_SYM) == 0)
2990 break;
2991 codesecsymend = i;
2992
2993 for (; i < symcount; ++i)
2994 if ((syms[i]->flags & BSF_SECTION_SYM) == 0)
2995 break;
2996 secsymend = i;
2997
2998 for (; i < symcount; ++i)
2999 if (strcmp (syms[i]->section->name, ".opd") != 0)
3000 break;
3001 opdsymend = i;
3002
3003 for (; i < symcount; ++i)
3004 if ((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3005 != (SEC_CODE | SEC_ALLOC))
3006 break;
3007 symcount = i;
3008
3009 count = 0;
3010
3011 if (relocatable)
3012 {
3013 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3014 arelent *r;
3015 size_t size;
3016 long relcount;
3017
3018 if (opdsymend == secsymend)
3019 goto done;
3020
3021 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3022 relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0;
3023 if (relcount == 0)
3024 goto done;
3025
3026 if (!(*slurp_relocs) (abfd, opd, static_syms, FALSE))
3027 {
3028 count = -1;
3029 goto done;
3030 }
3031
3032 size = 0;
3033 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3034 {
3035 asymbol *sym;
3036
3037 while (r < opd->relocation + relcount
3038 && r->address < syms[i]->value + opd->vma)
3039 ++r;
3040
3041 if (r == opd->relocation + relcount)
3042 break;
3043
3044 if (r->address != syms[i]->value + opd->vma)
3045 continue;
3046
3047 if (r->howto->type != R_PPC64_ADDR64)
3048 continue;
3049
3050 sym = *r->sym_ptr_ptr;
3051 if (!sym_exists_at (syms, opdsymend, symcount,
3052 sym->section->id, sym->value + r->addend))
3053 {
3054 ++count;
3055 size += sizeof (asymbol);
3056 size += strlen (syms[i]->name) + 2;
3057 }
3058 }
3059
3060 s = *ret = bfd_malloc (size);
3061 if (s == NULL)
3062 {
3063 count = -1;
3064 goto done;
3065 }
3066
3067 names = (char *) (s + count);
3068
3069 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3070 {
3071 asymbol *sym;
3072
3073 while (r < opd->relocation + relcount
3074 && r->address < syms[i]->value + opd->vma)
3075 ++r;
3076
3077 if (r == opd->relocation + relcount)
3078 break;
3079
3080 if (r->address != syms[i]->value + opd->vma)
3081 continue;
3082
3083 if (r->howto->type != R_PPC64_ADDR64)
3084 continue;
3085
3086 sym = *r->sym_ptr_ptr;
3087 if (!sym_exists_at (syms, opdsymend, symcount,
3088 sym->section->id, sym->value + r->addend))
3089 {
3090 size_t len;
3091
3092 *s = *syms[i];
3093 s->flags |= BSF_SYNTHETIC;
3094 s->section = sym->section;
3095 s->value = sym->value + r->addend;
3096 s->name = names;
3097 *names++ = '.';
3098 len = strlen (syms[i]->name);
3099 memcpy (names, syms[i]->name, len + 1);
3100 names += len + 1;
3101 /* Have udata.p point back to the original symbol this
3102 synthetic symbol was derived from. */
3103 s->udata.p = syms[i];
3104 s++;
3105 }
3106 }
3107 }
3108 else
3109 {
3110 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3111 bfd_byte *contents;
3112 size_t size;
3113 long plt_count = 0;
3114 bfd_vma glink_vma = 0, resolv_vma = 0;
3115 asection *dynamic, *glink = NULL, *relplt = NULL;
3116 arelent *p;
3117
3118 if (!bfd_malloc_and_get_section (abfd, opd, &contents))
3119 {
3120 if (contents)
3121 {
3122 free_contents_and_exit:
3123 free (contents);
3124 }
3125 count = -1;
3126 goto done;
3127 }
3128
3129 size = 0;
3130 for (i = secsymend; i < opdsymend; ++i)
3131 {
3132 bfd_vma ent;
3133
3134 /* Ignore bogus symbols. */
3135 if (syms[i]->value > opd->size - 8)
3136 continue;
3137
3138 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3139 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3140 {
3141 ++count;
3142 size += sizeof (asymbol);
3143 size += strlen (syms[i]->name) + 2;
3144 }
3145 }
3146
3147 /* Get start of .glink stubs from DT_PPC64_GLINK. */
3148 if (dyn_count != 0
3149 && (dynamic = bfd_get_section_by_name (abfd, ".dynamic")) != NULL)
3150 {
3151 bfd_byte *dynbuf, *extdyn, *extdynend;
3152 size_t extdynsize;
3153 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
3154
3155 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
3156 goto free_contents_and_exit;
3157
3158 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
3159 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
3160
3161 extdyn = dynbuf;
3162 extdynend = extdyn + dynamic->size;
3163 for (; extdyn < extdynend; extdyn += extdynsize)
3164 {
3165 Elf_Internal_Dyn dyn;
3166 (*swap_dyn_in) (abfd, extdyn, &dyn);
3167
3168 if (dyn.d_tag == DT_NULL)
3169 break;
3170
3171 if (dyn.d_tag == DT_PPC64_GLINK)
3172 {
3173 /* The first glink stub starts at offset 32; see comment in
3174 ppc64_elf_finish_dynamic_sections. */
3175 glink_vma = dyn.d_un.d_val + 32;
3176 /* The .glink section usually does not survive the final
3177 link; search for the section (usually .text) where the
3178 glink stubs now reside. */
3179 glink = bfd_sections_find_if (abfd, section_covers_vma,
3180 &glink_vma);
3181 break;
3182 }
3183 }
3184
3185 free (dynbuf);
3186 }
3187
3188 if (glink != NULL)
3189 {
3190 /* Determine __glink trampoline by reading the relative branch
3191 from the first glink stub. */
3192 bfd_byte buf[4];
3193 if (bfd_get_section_contents (abfd, glink, buf,
3194 glink_vma + 4 - glink->vma, 4))
3195 {
3196 unsigned int insn = bfd_get_32 (abfd, buf);
3197 insn ^= B_DOT;
3198 if ((insn & ~0x3fffffc) == 0)
3199 resolv_vma = glink_vma + 4 + (insn ^ 0x2000000) - 0x2000000;
3200 }
3201
3202 if (resolv_vma)
3203 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
3204
3205 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
3206 if (relplt != NULL)
3207 {
3208 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3209 if (! (*slurp_relocs) (abfd, relplt, dyn_syms, TRUE))
3210 goto free_contents_and_exit;
3211
3212 plt_count = relplt->size / sizeof (Elf64_External_Rela);
3213 size += plt_count * sizeof (asymbol);
3214
3215 p = relplt->relocation;
3216 for (i = 0; i < plt_count; i++, p++)
3217 {
3218 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
3219 if (p->addend != 0)
3220 size += sizeof ("+0x") - 1 + 16;
3221 }
3222 }
3223 }
3224
3225 s = *ret = bfd_malloc (size);
3226 if (s == NULL)
3227 goto free_contents_and_exit;
3228
3229 names = (char *) (s + count + plt_count + (resolv_vma != 0));
3230
3231 for (i = secsymend; i < opdsymend; ++i)
3232 {
3233 bfd_vma ent;
3234
3235 if (syms[i]->value > opd->size - 8)
3236 continue;
3237
3238 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3239 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3240 {
3241 long lo, hi;
3242 size_t len;
3243 asection *sec = abfd->sections;
3244
3245 *s = *syms[i];
3246 lo = codesecsym;
3247 hi = codesecsymend;
3248 while (lo < hi)
3249 {
3250 long mid = (lo + hi) >> 1;
3251 if (syms[mid]->section->vma < ent)
3252 lo = mid + 1;
3253 else if (syms[mid]->section->vma > ent)
3254 hi = mid;
3255 else
3256 {
3257 sec = syms[mid]->section;
3258 break;
3259 }
3260 }
3261
3262 if (lo >= hi && lo > codesecsym)
3263 sec = syms[lo - 1]->section;
3264
3265 for (; sec != NULL; sec = sec->next)
3266 {
3267 if (sec->vma > ent)
3268 break;
3269 if ((sec->flags & SEC_ALLOC) == 0
3270 || (sec->flags & SEC_LOAD) == 0)
3271 break;
3272 if ((sec->flags & SEC_CODE) != 0)
3273 s->section = sec;
3274 }
3275 s->flags |= BSF_SYNTHETIC;
3276 s->value = ent - s->section->vma;
3277 s->name = names;
3278 *names++ = '.';
3279 len = strlen (syms[i]->name);
3280 memcpy (names, syms[i]->name, len + 1);
3281 names += len + 1;
3282 /* Have udata.p point back to the original symbol this
3283 synthetic symbol was derived from. */
3284 s->udata.p = syms[i];
3285 s++;
3286 }
3287 }
3288 free (contents);
3289
3290 if (glink != NULL && relplt != NULL)
3291 {
3292 if (resolv_vma)
3293 {
3294 /* Add a symbol for the main glink trampoline. */
3295 memset (s, 0, sizeof *s);
3296 s->the_bfd = abfd;
3297 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3298 s->section = glink;
3299 s->value = resolv_vma - glink->vma;
3300 s->name = names;
3301 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3302 names += sizeof ("__glink_PLTresolve");
3303 s++;
3304 count++;
3305 }
3306
3307 /* FIXME: It would be very much nicer to put sym@plt on the
3308 stub rather than on the glink branch table entry. The
3309 objdump disassembler would then use a sensible symbol
3310 name on plt calls. The difficulty in doing so is
3311 a) finding the stubs, and,
3312 b) matching stubs against plt entries, and,
3313 c) there can be multiple stubs for a given plt entry.
3314
3315 Solving (a) could be done by code scanning, but older
3316 ppc64 binaries used different stubs to current code.
3317 (b) is the tricky one since you need to known the toc
3318 pointer for at least one function that uses a pic stub to
3319 be able to calculate the plt address referenced.
3320 (c) means gdb would need to set multiple breakpoints (or
3321 find the glink branch itself) when setting breakpoints
3322 for pending shared library loads. */
3323 p = relplt->relocation;
3324 for (i = 0; i < plt_count; i++, p++)
3325 {
3326 size_t len;
3327
3328 *s = **p->sym_ptr_ptr;
3329 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
3330 we are defining a symbol, ensure one of them is set. */
3331 if ((s->flags & BSF_LOCAL) == 0)
3332 s->flags |= BSF_GLOBAL;
3333 s->flags |= BSF_SYNTHETIC;
3334 s->section = glink;
3335 s->value = glink_vma - glink->vma;
3336 s->name = names;
3337 s->udata.p = NULL;
3338 len = strlen ((*p->sym_ptr_ptr)->name);
3339 memcpy (names, (*p->sym_ptr_ptr)->name, len);
3340 names += len;
3341 if (p->addend != 0)
3342 {
3343 memcpy (names, "+0x", sizeof ("+0x") - 1);
3344 names += sizeof ("+0x") - 1;
3345 bfd_sprintf_vma (abfd, names, p->addend);
3346 names += strlen (names);
3347 }
3348 memcpy (names, "@plt", sizeof ("@plt"));
3349 names += sizeof ("@plt");
3350 s++;
3351 glink_vma += 8;
3352 if (i >= 0x8000)
3353 glink_vma += 4;
3354 }
3355 count += plt_count;
3356 }
3357 }
3358
3359 done:
3360 free (syms);
3361 return count;
3362 }
3363 \f
3364 /* The following functions are specific to the ELF linker, while
3365 functions above are used generally. Those named ppc64_elf_* are
3366 called by the main ELF linker code. They appear in this file more
3367 or less in the order in which they are called. eg.
3368 ppc64_elf_check_relocs is called early in the link process,
3369 ppc64_elf_finish_dynamic_sections is one of the last functions
3370 called.
3371
3372 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
3373 functions have both a function code symbol and a function descriptor
3374 symbol. A call to foo in a relocatable object file looks like:
3375
3376 . .text
3377 . x:
3378 . bl .foo
3379 . nop
3380
3381 The function definition in another object file might be:
3382
3383 . .section .opd
3384 . foo: .quad .foo
3385 . .quad .TOC.@tocbase
3386 . .quad 0
3387 .
3388 . .text
3389 . .foo: blr
3390
3391 When the linker resolves the call during a static link, the branch
3392 unsurprisingly just goes to .foo and the .opd information is unused.
3393 If the function definition is in a shared library, things are a little
3394 different: The call goes via a plt call stub, the opd information gets
3395 copied to the plt, and the linker patches the nop.
3396
3397 . x:
3398 . bl .foo_stub
3399 . ld 2,40(1)
3400 .
3401 .
3402 . .foo_stub:
3403 . addis 12,2,Lfoo@toc@ha # in practice, the call stub
3404 . addi 12,12,Lfoo@toc@l # is slightly optimized, but
3405 . std 2,40(1) # this is the general idea
3406 . ld 11,0(12)
3407 . ld 2,8(12)
3408 . mtctr 11
3409 . ld 11,16(12)
3410 . bctr
3411 .
3412 . .section .plt
3413 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
3414
3415 The "reloc ()" notation is supposed to indicate that the linker emits
3416 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
3417 copying.
3418
3419 What are the difficulties here? Well, firstly, the relocations
3420 examined by the linker in check_relocs are against the function code
3421 sym .foo, while the dynamic relocation in the plt is emitted against
3422 the function descriptor symbol, foo. Somewhere along the line, we need
3423 to carefully copy dynamic link information from one symbol to the other.
3424 Secondly, the generic part of the elf linker will make .foo a dynamic
3425 symbol as is normal for most other backends. We need foo dynamic
3426 instead, at least for an application final link. However, when
3427 creating a shared library containing foo, we need to have both symbols
3428 dynamic so that references to .foo are satisfied during the early
3429 stages of linking. Otherwise the linker might decide to pull in a
3430 definition from some other object, eg. a static library.
3431
3432 Update: As of August 2004, we support a new convention. Function
3433 calls may use the function descriptor symbol, ie. "bl foo". This
3434 behaves exactly as "bl .foo". */
3435
3436 /* The linker needs to keep track of the number of relocs that it
3437 decides to copy as dynamic relocs in check_relocs for each symbol.
3438 This is so that it can later discard them if they are found to be
3439 unnecessary. We store the information in a field extending the
3440 regular ELF linker hash table. */
3441
3442 struct ppc_dyn_relocs
3443 {
3444 struct ppc_dyn_relocs *next;
3445
3446 /* The input section of the reloc. */
3447 asection *sec;
3448
3449 /* Total number of relocs copied for the input section. */
3450 bfd_size_type count;
3451
3452 /* Number of pc-relative relocs copied for the input section. */
3453 bfd_size_type pc_count;
3454 };
3455
3456 /* Track GOT entries needed for a given symbol. We might need more
3457 than one got entry per symbol. */
3458 struct got_entry
3459 {
3460 struct got_entry *next;
3461
3462 /* The symbol addend that we'll be placing in the GOT. */
3463 bfd_vma addend;
3464
3465 /* Unlike other ELF targets, we use separate GOT entries for the same
3466 symbol referenced from different input files. This is to support
3467 automatic multiple TOC/GOT sections, where the TOC base can vary
3468 from one input file to another. FIXME: After group_sections we
3469 ought to merge entries within the group.
3470
3471 Point to the BFD owning this GOT entry. */
3472 bfd *owner;
3473
3474 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
3475 TLS_TPREL or TLS_DTPREL for tls entries. */
3476 char tls_type;
3477
3478 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
3479 union
3480 {
3481 bfd_signed_vma refcount;
3482 bfd_vma offset;
3483 } got;
3484 };
3485
3486 /* The same for PLT. */
3487 struct plt_entry
3488 {
3489 struct plt_entry *next;
3490
3491 bfd_vma addend;
3492
3493 union
3494 {
3495 bfd_signed_vma refcount;
3496 bfd_vma offset;
3497 } plt;
3498 };
3499
3500 /* Of those relocs that might be copied as dynamic relocs, this function
3501 selects those that must be copied when linking a shared library,
3502 even when the symbol is local. */
3503
3504 static int
3505 must_be_dyn_reloc (struct bfd_link_info *info,
3506 enum elf_ppc64_reloc_type r_type)
3507 {
3508 switch (r_type)
3509 {
3510 default:
3511 return 1;
3512
3513 case R_PPC64_REL32:
3514 case R_PPC64_REL64:
3515 case R_PPC64_REL30:
3516 return 0;
3517
3518 case R_PPC64_TPREL16:
3519 case R_PPC64_TPREL16_LO:
3520 case R_PPC64_TPREL16_HI:
3521 case R_PPC64_TPREL16_HA:
3522 case R_PPC64_TPREL16_DS:
3523 case R_PPC64_TPREL16_LO_DS:
3524 case R_PPC64_TPREL16_HIGHER:
3525 case R_PPC64_TPREL16_HIGHERA:
3526 case R_PPC64_TPREL16_HIGHEST:
3527 case R_PPC64_TPREL16_HIGHESTA:
3528 case R_PPC64_TPREL64:
3529 return !info->executable;
3530 }
3531 }
3532
3533 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3534 copying dynamic variables from a shared lib into an app's dynbss
3535 section, and instead use a dynamic relocation to point into the
3536 shared lib. With code that gcc generates, it's vital that this be
3537 enabled; In the PowerPC64 ABI, the address of a function is actually
3538 the address of a function descriptor, which resides in the .opd
3539 section. gcc uses the descriptor directly rather than going via the
3540 GOT as some other ABI's do, which means that initialized function
3541 pointers must reference the descriptor. Thus, a function pointer
3542 initialized to the address of a function in a shared library will
3543 either require a copy reloc, or a dynamic reloc. Using a copy reloc
3544 redefines the function descriptor symbol to point to the copy. This
3545 presents a problem as a plt entry for that function is also
3546 initialized from the function descriptor symbol and the copy reloc
3547 may not be initialized first. */
3548 #define ELIMINATE_COPY_RELOCS 1
3549
3550 /* Section name for stubs is the associated section name plus this
3551 string. */
3552 #define STUB_SUFFIX ".stub"
3553
3554 /* Linker stubs.
3555 ppc_stub_long_branch:
3556 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
3557 destination, but a 24 bit branch in a stub section will reach.
3558 . b dest
3559
3560 ppc_stub_plt_branch:
3561 Similar to the above, but a 24 bit branch in the stub section won't
3562 reach its destination.
3563 . addis %r12,%r2,xxx@toc@ha
3564 . ld %r11,xxx@toc@l(%r12)
3565 . mtctr %r11
3566 . bctr
3567
3568 ppc_stub_plt_call:
3569 Used to call a function in a shared library. If it so happens that
3570 the plt entry referenced crosses a 64k boundary, then an extra
3571 "addi %r12,%r12,xxx@toc@l" will be inserted before the "mtctr".
3572 . addis %r12,%r2,xxx@toc@ha
3573 . std %r2,40(%r1)
3574 . ld %r11,xxx+0@toc@l(%r12)
3575 . mtctr %r11
3576 . ld %r2,xxx+8@toc@l(%r12)
3577 . ld %r11,xxx+16@toc@l(%r12)
3578 . bctr
3579
3580 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
3581 code to adjust the value and save r2 to support multiple toc sections.
3582 A ppc_stub_long_branch with an r2 offset looks like:
3583 . std %r2,40(%r1)
3584 . addis %r2,%r2,off@ha
3585 . addi %r2,%r2,off@l
3586 . b dest
3587
3588 A ppc_stub_plt_branch with an r2 offset looks like:
3589 . std %r2,40(%r1)
3590 . addis %r12,%r2,xxx@toc@ha
3591 . ld %r11,xxx@toc@l(%r12)
3592 . addis %r2,%r2,off@ha
3593 . addi %r2,%r2,off@l
3594 . mtctr %r11
3595 . bctr
3596
3597 In cases where the "addis" instruction would add zero, the "addis" is
3598 omitted and following instructions modified slightly in some cases.
3599 */
3600
3601 enum ppc_stub_type {
3602 ppc_stub_none,
3603 ppc_stub_long_branch,
3604 ppc_stub_long_branch_r2off,
3605 ppc_stub_plt_branch,
3606 ppc_stub_plt_branch_r2off,
3607 ppc_stub_plt_call
3608 };
3609
3610 struct ppc_stub_hash_entry {
3611
3612 /* Base hash table entry structure. */
3613 struct bfd_hash_entry root;
3614
3615 enum ppc_stub_type stub_type;
3616
3617 /* The stub section. */
3618 asection *stub_sec;
3619
3620 /* Offset within stub_sec of the beginning of this stub. */
3621 bfd_vma stub_offset;
3622
3623 /* Given the symbol's value and its section we can determine its final
3624 value when building the stubs (so the stub knows where to jump. */
3625 bfd_vma target_value;
3626 asection *target_section;
3627
3628 /* The symbol table entry, if any, that this was derived from. */
3629 struct ppc_link_hash_entry *h;
3630 struct plt_entry *plt_ent;
3631
3632 /* And the reloc addend that this was derived from. */
3633 bfd_vma addend;
3634
3635 /* Where this stub is being called from, or, in the case of combined
3636 stub sections, the first input section in the group. */
3637 asection *id_sec;
3638 };
3639
3640 struct ppc_branch_hash_entry {
3641
3642 /* Base hash table entry structure. */
3643 struct bfd_hash_entry root;
3644
3645 /* Offset within branch lookup table. */
3646 unsigned int offset;
3647
3648 /* Generation marker. */
3649 unsigned int iter;
3650 };
3651
3652 struct ppc_link_hash_entry
3653 {
3654 struct elf_link_hash_entry elf;
3655
3656 union {
3657 /* A pointer to the most recently used stub hash entry against this
3658 symbol. */
3659 struct ppc_stub_hash_entry *stub_cache;
3660
3661 /* A pointer to the next symbol starting with a '.' */
3662 struct ppc_link_hash_entry *next_dot_sym;
3663 } u;
3664
3665 /* Track dynamic relocs copied for this symbol. */
3666 struct ppc_dyn_relocs *dyn_relocs;
3667
3668 /* Link between function code and descriptor symbols. */
3669 struct ppc_link_hash_entry *oh;
3670
3671 /* Flag function code and descriptor symbols. */
3672 unsigned int is_func:1;
3673 unsigned int is_func_descriptor:1;
3674 unsigned int fake:1;
3675
3676 /* Whether global opd/toc sym has been adjusted or not.
3677 After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
3678 should be set for all globals defined in any opd/toc section. */
3679 unsigned int adjust_done:1;
3680
3681 /* Set if we twiddled this symbol to weak at some stage. */
3682 unsigned int was_undefined:1;
3683
3684 /* Contexts in which symbol is used in the GOT (or TOC).
3685 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
3686 corresponding relocs are encountered during check_relocs.
3687 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3688 indicate the corresponding GOT entry type is not needed.
3689 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
3690 a TPREL one. We use a separate flag rather than setting TPREL
3691 just for convenience in distinguishing the two cases. */
3692 #define TLS_GD 1 /* GD reloc. */
3693 #define TLS_LD 2 /* LD reloc. */
3694 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3695 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3696 #define TLS_TLS 16 /* Any TLS reloc. */
3697 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
3698 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
3699 #define PLT_IFUNC 128 /* STT_GNU_IFUNC. */
3700 char tls_mask;
3701 };
3702
3703 /* ppc64 ELF linker hash table. */
3704
3705 struct ppc_link_hash_table
3706 {
3707 struct elf_link_hash_table elf;
3708
3709 /* The stub hash table. */
3710 struct bfd_hash_table stub_hash_table;
3711
3712 /* Another hash table for plt_branch stubs. */
3713 struct bfd_hash_table branch_hash_table;
3714
3715 /* Linker stub bfd. */
3716 bfd *stub_bfd;
3717
3718 /* Linker call-backs. */
3719 asection * (*add_stub_section) (const char *, asection *);
3720 void (*layout_sections_again) (void);
3721
3722 /* Array to keep track of which stub sections have been created, and
3723 information on stub grouping. */
3724 struct map_stub {
3725 /* This is the section to which stubs in the group will be attached. */
3726 asection *link_sec;
3727 /* The stub section. */
3728 asection *stub_sec;
3729 /* Along with elf_gp, specifies the TOC pointer used in this group. */
3730 bfd_vma toc_off;
3731 } *stub_group;
3732
3733 /* Temp used when calculating TOC pointers. */
3734 bfd_vma toc_curr;
3735
3736 /* Highest input section id. */
3737 int top_id;
3738
3739 /* Highest output section index. */
3740 int top_index;
3741
3742 /* Used when adding symbols. */
3743 struct ppc_link_hash_entry *dot_syms;
3744
3745 /* List of input sections for each output section. */
3746 asection **input_list;
3747
3748 /* Short-cuts to get to dynamic linker sections. */
3749 asection *got;
3750 asection *plt;
3751 asection *relplt;
3752 asection *iplt;
3753 asection *reliplt;
3754 asection *dynbss;
3755 asection *relbss;
3756 asection *glink;
3757 asection *sfpr;
3758 asection *brlt;
3759 asection *relbrlt;
3760
3761 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
3762 struct ppc_link_hash_entry *tls_get_addr;
3763 struct ppc_link_hash_entry *tls_get_addr_fd;
3764
3765 /* Statistics. */
3766 unsigned long stub_count[ppc_stub_plt_call];
3767
3768 /* Number of stubs against global syms. */
3769 unsigned long stub_globals;
3770
3771 /* Set if we should emit symbols for stubs. */
3772 unsigned int emit_stub_syms:1;
3773
3774 /* Set if __tls_get_addr optimization should not be done. */
3775 unsigned int no_tls_get_addr_opt:1;
3776
3777 /* Support for multiple toc sections. */
3778 unsigned int no_multi_toc:1;
3779 unsigned int multi_toc_needed:1;
3780
3781 /* Set on error. */
3782 unsigned int stub_error:1;
3783
3784 /* Temp used by ppc64_elf_process_dot_syms. */
3785 unsigned int twiddled_syms:1;
3786
3787 /* Incremented every time we size stubs. */
3788 unsigned int stub_iteration;
3789
3790 /* Small local sym cache. */
3791 struct sym_cache sym_cache;
3792 };
3793
3794 /* Rename some of the generic section flags to better document how they
3795 are used here. */
3796 #define has_toc_reloc has_gp_reloc
3797 #define makes_toc_func_call need_finalize_relax
3798 #define call_check_in_progress reloc_done
3799
3800 /* Get the ppc64 ELF linker hash table from a link_info structure. */
3801
3802 #define ppc_hash_table(p) \
3803 ((struct ppc_link_hash_table *) ((p)->hash))
3804
3805 #define ppc_stub_hash_lookup(table, string, create, copy) \
3806 ((struct ppc_stub_hash_entry *) \
3807 bfd_hash_lookup ((table), (string), (create), (copy)))
3808
3809 #define ppc_branch_hash_lookup(table, string, create, copy) \
3810 ((struct ppc_branch_hash_entry *) \
3811 bfd_hash_lookup ((table), (string), (create), (copy)))
3812
3813 /* Create an entry in the stub hash table. */
3814
3815 static struct bfd_hash_entry *
3816 stub_hash_newfunc (struct bfd_hash_entry *entry,
3817 struct bfd_hash_table *table,
3818 const char *string)
3819 {
3820 /* Allocate the structure if it has not already been allocated by a
3821 subclass. */
3822 if (entry == NULL)
3823 {
3824 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
3825 if (entry == NULL)
3826 return entry;
3827 }
3828
3829 /* Call the allocation method of the superclass. */
3830 entry = bfd_hash_newfunc (entry, table, string);
3831 if (entry != NULL)
3832 {
3833 struct ppc_stub_hash_entry *eh;
3834
3835 /* Initialize the local fields. */
3836 eh = (struct ppc_stub_hash_entry *) entry;
3837 eh->stub_type = ppc_stub_none;
3838 eh->stub_sec = NULL;
3839 eh->stub_offset = 0;
3840 eh->target_value = 0;
3841 eh->target_section = NULL;
3842 eh->h = NULL;
3843 eh->id_sec = NULL;
3844 }
3845
3846 return entry;
3847 }
3848
3849 /* Create an entry in the branch hash table. */
3850
3851 static struct bfd_hash_entry *
3852 branch_hash_newfunc (struct bfd_hash_entry *entry,
3853 struct bfd_hash_table *table,
3854 const char *string)
3855 {
3856 /* Allocate the structure if it has not already been allocated by a
3857 subclass. */
3858 if (entry == NULL)
3859 {
3860 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
3861 if (entry == NULL)
3862 return entry;
3863 }
3864
3865 /* Call the allocation method of the superclass. */
3866 entry = bfd_hash_newfunc (entry, table, string);
3867 if (entry != NULL)
3868 {
3869 struct ppc_branch_hash_entry *eh;
3870
3871 /* Initialize the local fields. */
3872 eh = (struct ppc_branch_hash_entry *) entry;
3873 eh->offset = 0;
3874 eh->iter = 0;
3875 }
3876
3877 return entry;
3878 }
3879
3880 /* Create an entry in a ppc64 ELF linker hash table. */
3881
3882 static struct bfd_hash_entry *
3883 link_hash_newfunc (struct bfd_hash_entry *entry,
3884 struct bfd_hash_table *table,
3885 const char *string)
3886 {
3887 /* Allocate the structure if it has not already been allocated by a
3888 subclass. */
3889 if (entry == NULL)
3890 {
3891 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
3892 if (entry == NULL)
3893 return entry;
3894 }
3895
3896 /* Call the allocation method of the superclass. */
3897 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
3898 if (entry != NULL)
3899 {
3900 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
3901
3902 memset (&eh->u.stub_cache, 0,
3903 (sizeof (struct ppc_link_hash_entry)
3904 - offsetof (struct ppc_link_hash_entry, u.stub_cache)));
3905
3906 /* When making function calls, old ABI code references function entry
3907 points (dot symbols), while new ABI code references the function
3908 descriptor symbol. We need to make any combination of reference and
3909 definition work together, without breaking archive linking.
3910
3911 For a defined function "foo" and an undefined call to "bar":
3912 An old object defines "foo" and ".foo", references ".bar" (possibly
3913 "bar" too).
3914 A new object defines "foo" and references "bar".
3915
3916 A new object thus has no problem with its undefined symbols being
3917 satisfied by definitions in an old object. On the other hand, the
3918 old object won't have ".bar" satisfied by a new object.
3919
3920 Keep a list of newly added dot-symbols. */
3921
3922 if (string[0] == '.')
3923 {
3924 struct ppc_link_hash_table *htab;
3925
3926 htab = (struct ppc_link_hash_table *) table;
3927 eh->u.next_dot_sym = htab->dot_syms;
3928 htab->dot_syms = eh;
3929 }
3930 }
3931
3932 return entry;
3933 }
3934
3935 /* Create a ppc64 ELF linker hash table. */
3936
3937 static struct bfd_link_hash_table *
3938 ppc64_elf_link_hash_table_create (bfd *abfd)
3939 {
3940 struct ppc_link_hash_table *htab;
3941 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
3942
3943 htab = bfd_zmalloc (amt);
3944 if (htab == NULL)
3945 return NULL;
3946
3947 if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc,
3948 sizeof (struct ppc_link_hash_entry)))
3949 {
3950 free (htab);
3951 return NULL;
3952 }
3953
3954 /* Init the stub hash table too. */
3955 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc,
3956 sizeof (struct ppc_stub_hash_entry)))
3957 return NULL;
3958
3959 /* And the branch hash table. */
3960 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc,
3961 sizeof (struct ppc_branch_hash_entry)))
3962 return NULL;
3963
3964 /* Initializing two fields of the union is just cosmetic. We really
3965 only care about glist, but when compiled on a 32-bit host the
3966 bfd_vma fields are larger. Setting the bfd_vma to zero makes
3967 debugger inspection of these fields look nicer. */
3968 htab->elf.init_got_refcount.refcount = 0;
3969 htab->elf.init_got_refcount.glist = NULL;
3970 htab->elf.init_plt_refcount.refcount = 0;
3971 htab->elf.init_plt_refcount.glist = NULL;
3972 htab->elf.init_got_offset.offset = 0;
3973 htab->elf.init_got_offset.glist = NULL;
3974 htab->elf.init_plt_offset.offset = 0;
3975 htab->elf.init_plt_offset.glist = NULL;
3976
3977 return &htab->elf.root;
3978 }
3979
3980 /* Free the derived linker hash table. */
3981
3982 static void
3983 ppc64_elf_link_hash_table_free (struct bfd_link_hash_table *hash)
3984 {
3985 struct ppc_link_hash_table *ret = (struct ppc_link_hash_table *) hash;
3986
3987 bfd_hash_table_free (&ret->stub_hash_table);
3988 bfd_hash_table_free (&ret->branch_hash_table);
3989 _bfd_generic_link_hash_table_free (hash);
3990 }
3991
3992 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
3993
3994 void
3995 ppc64_elf_init_stub_bfd (bfd *abfd, struct bfd_link_info *info)
3996 {
3997 struct ppc_link_hash_table *htab;
3998
3999 elf_elfheader (abfd)->e_ident[EI_CLASS] = ELFCLASS64;
4000
4001 /* Always hook our dynamic sections into the first bfd, which is the
4002 linker created stub bfd. This ensures that the GOT header is at
4003 the start of the output TOC section. */
4004 htab = ppc_hash_table (info);
4005 htab->stub_bfd = abfd;
4006 htab->elf.dynobj = abfd;
4007 }
4008
4009 /* Build a name for an entry in the stub hash table. */
4010
4011 static char *
4012 ppc_stub_name (const asection *input_section,
4013 const asection *sym_sec,
4014 const struct ppc_link_hash_entry *h,
4015 const Elf_Internal_Rela *rel)
4016 {
4017 char *stub_name;
4018 bfd_size_type len;
4019
4020 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
4021 offsets from a sym as a branch target? In fact, we could
4022 probably assume the addend is always zero. */
4023 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
4024
4025 if (h)
4026 {
4027 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
4028 stub_name = bfd_malloc (len);
4029 if (stub_name == NULL)
4030 return stub_name;
4031
4032 sprintf (stub_name, "%08x.%s+%x",
4033 input_section->id & 0xffffffff,
4034 h->elf.root.root.string,
4035 (int) rel->r_addend & 0xffffffff);
4036 }
4037 else
4038 {
4039 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
4040 stub_name = bfd_malloc (len);
4041 if (stub_name == NULL)
4042 return stub_name;
4043
4044 sprintf (stub_name, "%08x.%x:%x+%x",
4045 input_section->id & 0xffffffff,
4046 sym_sec->id & 0xffffffff,
4047 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
4048 (int) rel->r_addend & 0xffffffff);
4049 }
4050 if (stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
4051 stub_name[len - 2] = 0;
4052 return stub_name;
4053 }
4054
4055 /* Look up an entry in the stub hash. Stub entries are cached because
4056 creating the stub name takes a bit of time. */
4057
4058 static struct ppc_stub_hash_entry *
4059 ppc_get_stub_entry (const asection *input_section,
4060 const asection *sym_sec,
4061 struct ppc_link_hash_entry *h,
4062 const Elf_Internal_Rela *rel,
4063 struct ppc_link_hash_table *htab)
4064 {
4065 struct ppc_stub_hash_entry *stub_entry;
4066 const asection *id_sec;
4067
4068 /* If this input section is part of a group of sections sharing one
4069 stub section, then use the id of the first section in the group.
4070 Stub names need to include a section id, as there may well be
4071 more than one stub used to reach say, printf, and we need to
4072 distinguish between them. */
4073 id_sec = htab->stub_group[input_section->id].link_sec;
4074
4075 if (h != NULL && h->u.stub_cache != NULL
4076 && h->u.stub_cache->h == h
4077 && h->u.stub_cache->id_sec == id_sec)
4078 {
4079 stub_entry = h->u.stub_cache;
4080 }
4081 else
4082 {
4083 char *stub_name;
4084
4085 stub_name = ppc_stub_name (id_sec, sym_sec, h, rel);
4086 if (stub_name == NULL)
4087 return NULL;
4088
4089 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
4090 stub_name, FALSE, FALSE);
4091 if (h != NULL)
4092 h->u.stub_cache = stub_entry;
4093
4094 free (stub_name);
4095 }
4096
4097 return stub_entry;
4098 }
4099
4100 /* Add a new stub entry to the stub hash. Not all fields of the new
4101 stub entry are initialised. */
4102
4103 static struct ppc_stub_hash_entry *
4104 ppc_add_stub (const char *stub_name,
4105 asection *section,
4106 struct ppc_link_hash_table *htab)
4107 {
4108 asection *link_sec;
4109 asection *stub_sec;
4110 struct ppc_stub_hash_entry *stub_entry;
4111
4112 link_sec = htab->stub_group[section->id].link_sec;
4113 stub_sec = htab->stub_group[section->id].stub_sec;
4114 if (stub_sec == NULL)
4115 {
4116 stub_sec = htab->stub_group[link_sec->id].stub_sec;
4117 if (stub_sec == NULL)
4118 {
4119 size_t namelen;
4120 bfd_size_type len;
4121 char *s_name;
4122
4123 namelen = strlen (link_sec->name);
4124 len = namelen + sizeof (STUB_SUFFIX);
4125 s_name = bfd_alloc (htab->stub_bfd, len);
4126 if (s_name == NULL)
4127 return NULL;
4128
4129 memcpy (s_name, link_sec->name, namelen);
4130 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
4131 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
4132 if (stub_sec == NULL)
4133 return NULL;
4134 htab->stub_group[link_sec->id].stub_sec = stub_sec;
4135 }
4136 htab->stub_group[section->id].stub_sec = stub_sec;
4137 }
4138
4139 /* Enter this entry into the linker stub hash table. */
4140 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
4141 TRUE, FALSE);
4142 if (stub_entry == NULL)
4143 {
4144 (*_bfd_error_handler) (_("%B: cannot create stub entry %s"),
4145 section->owner, stub_name);
4146 return NULL;
4147 }
4148
4149 stub_entry->stub_sec = stub_sec;
4150 stub_entry->stub_offset = 0;
4151 stub_entry->id_sec = link_sec;
4152 return stub_entry;
4153 }
4154
4155 /* Create sections for linker generated code. */
4156
4157 static bfd_boolean
4158 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
4159 {
4160 struct ppc_link_hash_table *htab;
4161 flagword flags;
4162
4163 htab = ppc_hash_table (info);
4164
4165 /* Create .sfpr for code to save and restore fp regs. */
4166 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
4167 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4168 htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr",
4169 flags);
4170 if (htab->sfpr == NULL
4171 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
4172 return FALSE;
4173
4174 /* Create .glink for lazy dynamic linking support. */
4175 htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink",
4176 flags);
4177 if (htab->glink == NULL
4178 || ! bfd_set_section_alignment (dynobj, htab->glink, 3))
4179 return FALSE;
4180
4181 flags = SEC_ALLOC | SEC_LINKER_CREATED;
4182 htab->iplt = bfd_make_section_anyway_with_flags (dynobj, ".iplt", flags);
4183 if (htab->iplt == NULL
4184 || ! bfd_set_section_alignment (dynobj, htab->iplt, 3))
4185 return FALSE;
4186
4187 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4188 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4189 htab->reliplt = bfd_make_section_anyway_with_flags (dynobj,
4190 ".rela.iplt",
4191 flags);
4192 if (htab->reliplt == NULL
4193 || ! bfd_set_section_alignment (dynobj, htab->reliplt, 3))
4194 return FALSE;
4195
4196 /* Create branch lookup table for plt_branch stubs. */
4197 flags = (SEC_ALLOC | SEC_LOAD
4198 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4199 htab->brlt = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt",
4200 flags);
4201 if (htab->brlt == NULL
4202 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
4203 return FALSE;
4204
4205 if (!info->shared)
4206 return TRUE;
4207
4208 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4209 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4210 htab->relbrlt = bfd_make_section_anyway_with_flags (dynobj,
4211 ".rela.branch_lt",
4212 flags);
4213 if (htab->relbrlt == NULL
4214 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
4215 return FALSE;
4216
4217 return TRUE;
4218 }
4219
4220 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
4221 not already done. */
4222
4223 static bfd_boolean
4224 create_got_section (bfd *abfd, struct bfd_link_info *info)
4225 {
4226 asection *got, *relgot;
4227 flagword flags;
4228 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4229
4230 if (!is_ppc64_elf (abfd))
4231 return FALSE;
4232
4233 if (!htab->got)
4234 {
4235 if (! _bfd_elf_create_got_section (htab->elf.dynobj, info))
4236 return FALSE;
4237
4238 htab->got = bfd_get_section_by_name (htab->elf.dynobj, ".got");
4239 if (!htab->got)
4240 abort ();
4241 }
4242
4243 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
4244 | SEC_LINKER_CREATED);
4245
4246 got = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
4247 if (!got
4248 || !bfd_set_section_alignment (abfd, got, 3))
4249 return FALSE;
4250
4251 relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got",
4252 flags | SEC_READONLY);
4253 if (!relgot
4254 || ! bfd_set_section_alignment (abfd, relgot, 3))
4255 return FALSE;
4256
4257 ppc64_elf_tdata (abfd)->got = got;
4258 ppc64_elf_tdata (abfd)->relgot = relgot;
4259 return TRUE;
4260 }
4261
4262 /* Create the dynamic sections, and set up shortcuts. */
4263
4264 static bfd_boolean
4265 ppc64_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
4266 {
4267 struct ppc_link_hash_table *htab;
4268
4269 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
4270 return FALSE;
4271
4272 htab = ppc_hash_table (info);
4273 if (!htab->got)
4274 htab->got = bfd_get_section_by_name (dynobj, ".got");
4275 htab->plt = bfd_get_section_by_name (dynobj, ".plt");
4276 htab->relplt = bfd_get_section_by_name (dynobj, ".rela.plt");
4277 htab->dynbss = bfd_get_section_by_name (dynobj, ".dynbss");
4278 if (!info->shared)
4279 htab->relbss = bfd_get_section_by_name (dynobj, ".rela.bss");
4280
4281 if (!htab->got || !htab->plt || !htab->relplt || !htab->dynbss
4282 || (!info->shared && !htab->relbss))
4283 abort ();
4284
4285 return TRUE;
4286 }
4287
4288 /* Follow indirect and warning symbol links. */
4289
4290 static inline struct bfd_link_hash_entry *
4291 follow_link (struct bfd_link_hash_entry *h)
4292 {
4293 while (h->type == bfd_link_hash_indirect
4294 || h->type == bfd_link_hash_warning)
4295 h = h->u.i.link;
4296 return h;
4297 }
4298
4299 static inline struct elf_link_hash_entry *
4300 elf_follow_link (struct elf_link_hash_entry *h)
4301 {
4302 return (struct elf_link_hash_entry *) follow_link (&h->root);
4303 }
4304
4305 static inline struct ppc_link_hash_entry *
4306 ppc_follow_link (struct ppc_link_hash_entry *h)
4307 {
4308 return (struct ppc_link_hash_entry *) follow_link (&h->elf.root);
4309 }
4310
4311 /* Merge PLT info on FROM with that on TO. */
4312
4313 static void
4314 move_plt_plist (struct ppc_link_hash_entry *from,
4315 struct ppc_link_hash_entry *to)
4316 {
4317 if (from->elf.plt.plist != NULL)
4318 {
4319 if (to->elf.plt.plist != NULL)
4320 {
4321 struct plt_entry **entp;
4322 struct plt_entry *ent;
4323
4324 for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; )
4325 {
4326 struct plt_entry *dent;
4327
4328 for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next)
4329 if (dent->addend == ent->addend)
4330 {
4331 dent->plt.refcount += ent->plt.refcount;
4332 *entp = ent->next;
4333 break;
4334 }
4335 if (dent == NULL)
4336 entp = &ent->next;
4337 }
4338 *entp = to->elf.plt.plist;
4339 }
4340
4341 to->elf.plt.plist = from->elf.plt.plist;
4342 from->elf.plt.plist = NULL;
4343 }
4344 }
4345
4346 /* Copy the extra info we tack onto an elf_link_hash_entry. */
4347
4348 static void
4349 ppc64_elf_copy_indirect_symbol (struct bfd_link_info *info,
4350 struct elf_link_hash_entry *dir,
4351 struct elf_link_hash_entry *ind)
4352 {
4353 struct ppc_link_hash_entry *edir, *eind;
4354
4355 edir = (struct ppc_link_hash_entry *) dir;
4356 eind = (struct ppc_link_hash_entry *) ind;
4357
4358 /* Copy over any dynamic relocs we may have on the indirect sym. */
4359 if (eind->dyn_relocs != NULL)
4360 {
4361 if (edir->dyn_relocs != NULL)
4362 {
4363 struct ppc_dyn_relocs **pp;
4364 struct ppc_dyn_relocs *p;
4365
4366 /* Add reloc counts against the indirect sym to the direct sym
4367 list. Merge any entries against the same section. */
4368 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
4369 {
4370 struct ppc_dyn_relocs *q;
4371
4372 for (q = edir->dyn_relocs; q != NULL; q = q->next)
4373 if (q->sec == p->sec)
4374 {
4375 q->pc_count += p->pc_count;
4376 q->count += p->count;
4377 *pp = p->next;
4378 break;
4379 }
4380 if (q == NULL)
4381 pp = &p->next;
4382 }
4383 *pp = edir->dyn_relocs;
4384 }
4385
4386 edir->dyn_relocs = eind->dyn_relocs;
4387 eind->dyn_relocs = NULL;
4388 }
4389
4390 edir->is_func |= eind->is_func;
4391 edir->is_func_descriptor |= eind->is_func_descriptor;
4392 edir->tls_mask |= eind->tls_mask;
4393 if (eind->oh != NULL)
4394 edir->oh = ppc_follow_link (eind->oh);
4395
4396 /* If called to transfer flags for a weakdef during processing
4397 of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF.
4398 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
4399 if (!(ELIMINATE_COPY_RELOCS
4400 && eind->elf.root.type != bfd_link_hash_indirect
4401 && edir->elf.dynamic_adjusted))
4402 edir->elf.non_got_ref |= eind->elf.non_got_ref;
4403
4404 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
4405 edir->elf.ref_regular |= eind->elf.ref_regular;
4406 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
4407 edir->elf.needs_plt |= eind->elf.needs_plt;
4408
4409 /* If we were called to copy over info for a weak sym, that's all. */
4410 if (eind->elf.root.type != bfd_link_hash_indirect)
4411 return;
4412
4413 /* Copy over got entries that we may have already seen to the
4414 symbol which just became indirect. */
4415 if (eind->elf.got.glist != NULL)
4416 {
4417 if (edir->elf.got.glist != NULL)
4418 {
4419 struct got_entry **entp;
4420 struct got_entry *ent;
4421
4422 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
4423 {
4424 struct got_entry *dent;
4425
4426 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
4427 if (dent->addend == ent->addend
4428 && dent->owner == ent->owner
4429 && dent->tls_type == ent->tls_type)
4430 {
4431 dent->got.refcount += ent->got.refcount;
4432 *entp = ent->next;
4433 break;
4434 }
4435 if (dent == NULL)
4436 entp = &ent->next;
4437 }
4438 *entp = edir->elf.got.glist;
4439 }
4440
4441 edir->elf.got.glist = eind->elf.got.glist;
4442 eind->elf.got.glist = NULL;
4443 }
4444
4445 /* And plt entries. */
4446 move_plt_plist (eind, edir);
4447
4448 if (eind->elf.dynindx != -1)
4449 {
4450 if (edir->elf.dynindx != -1)
4451 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4452 edir->elf.dynstr_index);
4453 edir->elf.dynindx = eind->elf.dynindx;
4454 edir->elf.dynstr_index = eind->elf.dynstr_index;
4455 eind->elf.dynindx = -1;
4456 eind->elf.dynstr_index = 0;
4457 }
4458 }
4459
4460 /* Find the function descriptor hash entry from the given function code
4461 hash entry FH. Link the entries via their OH fields. */
4462
4463 static struct ppc_link_hash_entry *
4464 lookup_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
4465 {
4466 struct ppc_link_hash_entry *fdh = fh->oh;
4467
4468 if (fdh == NULL)
4469 {
4470 const char *fd_name = fh->elf.root.root.string + 1;
4471
4472 fdh = (struct ppc_link_hash_entry *)
4473 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
4474 if (fdh == NULL)
4475 return fdh;
4476
4477 fdh->is_func_descriptor = 1;
4478 fdh->oh = fh;
4479 fh->is_func = 1;
4480 fh->oh = fdh;
4481 }
4482
4483 return ppc_follow_link (fdh);
4484 }
4485
4486 /* Make a fake function descriptor sym for the code sym FH. */
4487
4488 static struct ppc_link_hash_entry *
4489 make_fdh (struct bfd_link_info *info,
4490 struct ppc_link_hash_entry *fh)
4491 {
4492 bfd *abfd;
4493 asymbol *newsym;
4494 struct bfd_link_hash_entry *bh;
4495 struct ppc_link_hash_entry *fdh;
4496
4497 abfd = fh->elf.root.u.undef.abfd;
4498 newsym = bfd_make_empty_symbol (abfd);
4499 newsym->name = fh->elf.root.root.string + 1;
4500 newsym->section = bfd_und_section_ptr;
4501 newsym->value = 0;
4502 newsym->flags = BSF_WEAK;
4503
4504 bh = NULL;
4505 if (!_bfd_generic_link_add_one_symbol (info, abfd, newsym->name,
4506 newsym->flags, newsym->section,
4507 newsym->value, NULL, FALSE, FALSE,
4508 &bh))
4509 return NULL;
4510
4511 fdh = (struct ppc_link_hash_entry *) bh;
4512 fdh->elf.non_elf = 0;
4513 fdh->fake = 1;
4514 fdh->is_func_descriptor = 1;
4515 fdh->oh = fh;
4516 fh->is_func = 1;
4517 fh->oh = fdh;
4518 return fdh;
4519 }
4520
4521 /* Fix function descriptor symbols defined in .opd sections to be
4522 function type. */
4523
4524 static bfd_boolean
4525 ppc64_elf_add_symbol_hook (bfd *ibfd ATTRIBUTE_UNUSED,
4526 struct bfd_link_info *info,
4527 Elf_Internal_Sym *isym,
4528 const char **name ATTRIBUTE_UNUSED,
4529 flagword *flags ATTRIBUTE_UNUSED,
4530 asection **sec,
4531 bfd_vma *value ATTRIBUTE_UNUSED)
4532 {
4533 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
4534 elf_tdata (info->output_bfd)->has_ifunc_symbols = TRUE;
4535 else if (ELF_ST_TYPE (isym->st_info) == STT_FUNC)
4536 ;
4537 else if (*sec != NULL
4538 && strcmp (bfd_get_section_name (ibfd, *sec), ".opd") == 0)
4539 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
4540
4541 return TRUE;
4542 }
4543
4544 /* This function makes an old ABI object reference to ".bar" cause the
4545 inclusion of a new ABI object archive that defines "bar".
4546 NAME is a symbol defined in an archive. Return a symbol in the hash
4547 table that might be satisfied by the archive symbols. */
4548
4549 static struct elf_link_hash_entry *
4550 ppc64_elf_archive_symbol_lookup (bfd *abfd,
4551 struct bfd_link_info *info,
4552 const char *name)
4553 {
4554 struct elf_link_hash_entry *h;
4555 char *dot_name;
4556 size_t len;
4557
4558 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
4559 if (h != NULL
4560 /* Don't return this sym if it is a fake function descriptor
4561 created by add_symbol_adjust. */
4562 && !(h->root.type == bfd_link_hash_undefweak
4563 && ((struct ppc_link_hash_entry *) h)->fake))
4564 return h;
4565
4566 if (name[0] == '.')
4567 return h;
4568
4569 len = strlen (name);
4570 dot_name = bfd_alloc (abfd, len + 2);
4571 if (dot_name == NULL)
4572 return (struct elf_link_hash_entry *) 0 - 1;
4573 dot_name[0] = '.';
4574 memcpy (dot_name + 1, name, len + 1);
4575 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
4576 bfd_release (abfd, dot_name);
4577 return h;
4578 }
4579
4580 /* This function satisfies all old ABI object references to ".bar" if a
4581 new ABI object defines "bar". Well, at least, undefined dot symbols
4582 are made weak. This stops later archive searches from including an
4583 object if we already have a function descriptor definition. It also
4584 prevents the linker complaining about undefined symbols.
4585 We also check and correct mismatched symbol visibility here. The
4586 most restrictive visibility of the function descriptor and the
4587 function entry symbol is used. */
4588
4589 static bfd_boolean
4590 add_symbol_adjust (struct ppc_link_hash_entry *eh, struct bfd_link_info *info)
4591 {
4592 struct ppc_link_hash_table *htab;
4593 struct ppc_link_hash_entry *fdh;
4594
4595 if (eh->elf.root.type == bfd_link_hash_indirect)
4596 return TRUE;
4597
4598 if (eh->elf.root.type == bfd_link_hash_warning)
4599 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
4600
4601 if (eh->elf.root.root.string[0] != '.')
4602 abort ();
4603
4604 htab = ppc_hash_table (info);
4605 fdh = lookup_fdh (eh, htab);
4606 if (fdh == NULL)
4607 {
4608 if (!info->relocatable
4609 && (eh->elf.root.type == bfd_link_hash_undefined
4610 || eh->elf.root.type == bfd_link_hash_undefweak)
4611 && eh->elf.ref_regular)
4612 {
4613 /* Make an undefweak function descriptor sym, which is enough to
4614 pull in an --as-needed shared lib, but won't cause link
4615 errors. Archives are handled elsewhere. */
4616 fdh = make_fdh (info, eh);
4617 if (fdh == NULL)
4618 return FALSE;
4619 fdh->elf.ref_regular = 1;
4620 }
4621 }
4622 else
4623 {
4624 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
4625 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
4626 if (entry_vis < descr_vis)
4627 fdh->elf.other += entry_vis - descr_vis;
4628 else if (entry_vis > descr_vis)
4629 eh->elf.other += descr_vis - entry_vis;
4630
4631 if ((fdh->elf.root.type == bfd_link_hash_defined
4632 || fdh->elf.root.type == bfd_link_hash_defweak)
4633 && eh->elf.root.type == bfd_link_hash_undefined)
4634 {
4635 eh->elf.root.type = bfd_link_hash_undefweak;
4636 eh->was_undefined = 1;
4637 htab->twiddled_syms = 1;
4638 }
4639 }
4640
4641 return TRUE;
4642 }
4643
4644 /* Process list of dot-symbols we made in link_hash_newfunc. */
4645
4646 static bfd_boolean
4647 ppc64_elf_process_dot_syms (bfd *ibfd, struct bfd_link_info *info)
4648 {
4649 struct ppc_link_hash_table *htab;
4650 struct ppc_link_hash_entry **p, *eh;
4651
4652 htab = ppc_hash_table (info);
4653 if (!is_ppc64_elf (info->output_bfd))
4654 return TRUE;
4655
4656 if (is_ppc64_elf (ibfd))
4657 {
4658 p = &htab->dot_syms;
4659 while ((eh = *p) != NULL)
4660 {
4661 *p = NULL;
4662 if (!add_symbol_adjust (eh, info))
4663 return FALSE;
4664 p = &eh->u.next_dot_sym;
4665 }
4666 }
4667
4668 /* Clear the list for non-ppc64 input files. */
4669 p = &htab->dot_syms;
4670 while ((eh = *p) != NULL)
4671 {
4672 *p = NULL;
4673 p = &eh->u.next_dot_sym;
4674 }
4675
4676 /* We need to fix the undefs list for any syms we have twiddled to
4677 undef_weak. */
4678 if (htab->twiddled_syms)
4679 {
4680 bfd_link_repair_undef_list (&htab->elf.root);
4681 htab->twiddled_syms = 0;
4682 }
4683 return TRUE;
4684 }
4685
4686 /* Undo hash table changes when an --as-needed input file is determined
4687 not to be needed. */
4688
4689 static bfd_boolean
4690 ppc64_elf_as_needed_cleanup (bfd *ibfd ATTRIBUTE_UNUSED,
4691 struct bfd_link_info *info)
4692 {
4693 ppc_hash_table (info)->dot_syms = NULL;
4694 return TRUE;
4695 }
4696
4697 static struct plt_entry **
4698 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
4699 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
4700 {
4701 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
4702 struct plt_entry **local_plt;
4703 char *local_got_tls_masks;
4704
4705 if (local_got_ents == NULL)
4706 {
4707 bfd_size_type size = symtab_hdr->sh_info;
4708
4709 size *= (sizeof (*local_got_ents)
4710 + sizeof (*local_plt)
4711 + sizeof (*local_got_tls_masks));
4712 local_got_ents = bfd_zalloc (abfd, size);
4713 if (local_got_ents == NULL)
4714 return NULL;
4715 elf_local_got_ents (abfd) = local_got_ents;
4716 }
4717
4718 if ((tls_type & (PLT_IFUNC | TLS_EXPLICIT)) == 0)
4719 {
4720 struct got_entry *ent;
4721
4722 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
4723 if (ent->addend == r_addend
4724 && ent->owner == abfd
4725 && ent->tls_type == tls_type)
4726 break;
4727 if (ent == NULL)
4728 {
4729 bfd_size_type amt = sizeof (*ent);
4730 ent = bfd_alloc (abfd, amt);
4731 if (ent == NULL)
4732 return FALSE;
4733 ent->next = local_got_ents[r_symndx];
4734 ent->addend = r_addend;
4735 ent->owner = abfd;
4736 ent->tls_type = tls_type;
4737 ent->got.refcount = 0;
4738 local_got_ents[r_symndx] = ent;
4739 }
4740 ent->got.refcount += 1;
4741 }
4742
4743 local_plt = (struct plt_entry **) (local_got_ents + symtab_hdr->sh_info);
4744 local_got_tls_masks = (char *) (local_plt + symtab_hdr->sh_info);
4745 local_got_tls_masks[r_symndx] |= tls_type;
4746
4747 return local_plt + r_symndx;
4748 }
4749
4750 static bfd_boolean
4751 update_plt_info (bfd *abfd, struct plt_entry **plist, bfd_vma addend)
4752 {
4753 struct plt_entry *ent;
4754
4755 for (ent = *plist; ent != NULL; ent = ent->next)
4756 if (ent->addend == addend)
4757 break;
4758 if (ent == NULL)
4759 {
4760 bfd_size_type amt = sizeof (*ent);
4761 ent = bfd_alloc (abfd, amt);
4762 if (ent == NULL)
4763 return FALSE;
4764 ent->next = *plist;
4765 ent->addend = addend;
4766 ent->plt.refcount = 0;
4767 *plist = ent;
4768 }
4769 ent->plt.refcount += 1;
4770 return TRUE;
4771 }
4772
4773 static bfd_boolean
4774 is_branch_reloc (enum elf_ppc64_reloc_type r_type)
4775 {
4776 return (r_type == R_PPC64_REL24
4777 || r_type == R_PPC64_REL14
4778 || r_type == R_PPC64_REL14_BRTAKEN
4779 || r_type == R_PPC64_REL14_BRNTAKEN
4780 || r_type == R_PPC64_ADDR24
4781 || r_type == R_PPC64_ADDR14
4782 || r_type == R_PPC64_ADDR14_BRTAKEN
4783 || r_type == R_PPC64_ADDR14_BRNTAKEN);
4784 }
4785
4786 /* Look through the relocs for a section during the first phase, and
4787 calculate needed space in the global offset table, procedure
4788 linkage table, and dynamic reloc sections. */
4789
4790 static bfd_boolean
4791 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
4792 asection *sec, const Elf_Internal_Rela *relocs)
4793 {
4794 struct ppc_link_hash_table *htab;
4795 Elf_Internal_Shdr *symtab_hdr;
4796 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
4797 const Elf_Internal_Rela *rel;
4798 const Elf_Internal_Rela *rel_end;
4799 asection *sreloc;
4800 asection **opd_sym_map;
4801 struct elf_link_hash_entry *tga, *dottga;
4802
4803 if (info->relocatable)
4804 return TRUE;
4805
4806 /* Don't do anything special with non-loaded, non-alloced sections.
4807 In particular, any relocs in such sections should not affect GOT
4808 and PLT reference counting (ie. we don't allow them to create GOT
4809 or PLT entries), there's no possibility or desire to optimize TLS
4810 relocs, and there's not much point in propagating relocs to shared
4811 libs that the dynamic linker won't relocate. */
4812 if ((sec->flags & SEC_ALLOC) == 0)
4813 return TRUE;
4814
4815 BFD_ASSERT (is_ppc64_elf (abfd));
4816
4817 htab = ppc_hash_table (info);
4818 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
4819 FALSE, FALSE, TRUE);
4820 dottga = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
4821 FALSE, FALSE, TRUE);
4822 symtab_hdr = &elf_symtab_hdr (abfd);
4823
4824 sym_hashes = elf_sym_hashes (abfd);
4825 sym_hashes_end = (sym_hashes
4826 + symtab_hdr->sh_size / sizeof (Elf64_External_Sym)
4827 - symtab_hdr->sh_info);
4828
4829 sreloc = NULL;
4830 opd_sym_map = NULL;
4831 if (strcmp (bfd_get_section_name (abfd, sec), ".opd") == 0)
4832 {
4833 /* Garbage collection needs some extra help with .opd sections.
4834 We don't want to necessarily keep everything referenced by
4835 relocs in .opd, as that would keep all functions. Instead,
4836 if we reference an .opd symbol (a function descriptor), we
4837 want to keep the function code symbol's section. This is
4838 easy for global symbols, but for local syms we need to keep
4839 information about the associated function section. */
4840 bfd_size_type amt;
4841
4842 amt = sec->size * sizeof (*opd_sym_map) / 8;
4843 opd_sym_map = bfd_zalloc (abfd, amt);
4844 if (opd_sym_map == NULL)
4845 return FALSE;
4846 ppc64_elf_section_data (sec)->u.opd.func_sec = opd_sym_map;
4847 BFD_ASSERT (ppc64_elf_section_data (sec)->sec_type == sec_normal);
4848 ppc64_elf_section_data (sec)->sec_type = sec_opd;
4849 }
4850
4851 if (htab->sfpr == NULL
4852 && !create_linkage_sections (htab->elf.dynobj, info))
4853 return FALSE;
4854
4855 rel_end = relocs + sec->reloc_count;
4856 for (rel = relocs; rel < rel_end; rel++)
4857 {
4858 unsigned long r_symndx;
4859 struct elf_link_hash_entry *h;
4860 enum elf_ppc64_reloc_type r_type;
4861 int tls_type;
4862 struct _ppc64_elf_section_data *ppc64_sec;
4863 struct plt_entry **ifunc;
4864
4865 r_symndx = ELF64_R_SYM (rel->r_info);
4866 if (r_symndx < symtab_hdr->sh_info)
4867 h = NULL;
4868 else
4869 {
4870 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4871 h = elf_follow_link (h);
4872 }
4873
4874 tls_type = 0;
4875 ifunc = NULL;
4876 if (h != NULL)
4877 {
4878 if (h->type == STT_GNU_IFUNC)
4879 {
4880 h->needs_plt = 1;
4881 ifunc = &h->plt.plist;
4882 }
4883 }
4884 else
4885 {
4886 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4887 abfd, r_symndx);
4888 if (isym == NULL)
4889 return FALSE;
4890
4891 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
4892 {
4893 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
4894 rel->r_addend, PLT_IFUNC);
4895 if (ifunc == NULL)
4896 return FALSE;
4897 }
4898 }
4899 r_type = ELF64_R_TYPE (rel->r_info);
4900 if (is_branch_reloc (r_type))
4901 {
4902 if (h != NULL && (h == tga || h == dottga))
4903 {
4904 if (rel != relocs
4905 && (ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSGD
4906 || ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSLD))
4907 /* We have a new-style __tls_get_addr call with a marker
4908 reloc. */
4909 ;
4910 else
4911 /* Mark this section as having an old-style call. */
4912 sec->has_tls_get_addr_call = 1;
4913 }
4914
4915 /* STT_GNU_IFUNC symbols must have a PLT entry. */
4916 if (ifunc != NULL
4917 && !update_plt_info (abfd, ifunc, rel->r_addend))
4918 return FALSE;
4919 }
4920
4921 switch (r_type)
4922 {
4923 case R_PPC64_TLSGD:
4924 case R_PPC64_TLSLD:
4925 /* These special tls relocs tie a call to __tls_get_addr with
4926 its parameter symbol. */
4927 break;
4928
4929 case R_PPC64_GOT_TLSLD16:
4930 case R_PPC64_GOT_TLSLD16_LO:
4931 case R_PPC64_GOT_TLSLD16_HI:
4932 case R_PPC64_GOT_TLSLD16_HA:
4933 tls_type = TLS_TLS | TLS_LD;
4934 goto dogottls;
4935
4936 case R_PPC64_GOT_TLSGD16:
4937 case R_PPC64_GOT_TLSGD16_LO:
4938 case R_PPC64_GOT_TLSGD16_HI:
4939 case R_PPC64_GOT_TLSGD16_HA:
4940 tls_type = TLS_TLS | TLS_GD;
4941 goto dogottls;
4942
4943 case R_PPC64_GOT_TPREL16_DS:
4944 case R_PPC64_GOT_TPREL16_LO_DS:
4945 case R_PPC64_GOT_TPREL16_HI:
4946 case R_PPC64_GOT_TPREL16_HA:
4947 if (!info->executable)
4948 info->flags |= DF_STATIC_TLS;
4949 tls_type = TLS_TLS | TLS_TPREL;
4950 goto dogottls;
4951
4952 case R_PPC64_GOT_DTPREL16_DS:
4953 case R_PPC64_GOT_DTPREL16_LO_DS:
4954 case R_PPC64_GOT_DTPREL16_HI:
4955 case R_PPC64_GOT_DTPREL16_HA:
4956 tls_type = TLS_TLS | TLS_DTPREL;
4957 dogottls:
4958 sec->has_tls_reloc = 1;
4959 /* Fall thru */
4960
4961 case R_PPC64_GOT16:
4962 case R_PPC64_GOT16_DS:
4963 case R_PPC64_GOT16_HA:
4964 case R_PPC64_GOT16_HI:
4965 case R_PPC64_GOT16_LO:
4966 case R_PPC64_GOT16_LO_DS:
4967 /* This symbol requires a global offset table entry. */
4968 sec->has_toc_reloc = 1;
4969 if (ppc64_elf_tdata (abfd)->got == NULL
4970 && !create_got_section (abfd, info))
4971 return FALSE;
4972
4973 if (h != NULL)
4974 {
4975 struct ppc_link_hash_entry *eh;
4976 struct got_entry *ent;
4977
4978 eh = (struct ppc_link_hash_entry *) h;
4979 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
4980 if (ent->addend == rel->r_addend
4981 && ent->owner == abfd
4982 && ent->tls_type == tls_type)
4983 break;
4984 if (ent == NULL)
4985 {
4986 bfd_size_type amt = sizeof (*ent);
4987 ent = bfd_alloc (abfd, amt);
4988 if (ent == NULL)
4989 return FALSE;
4990 ent->next = eh->elf.got.glist;
4991 ent->addend = rel->r_addend;
4992 ent->owner = abfd;
4993 ent->tls_type = tls_type;
4994 ent->got.refcount = 0;
4995 eh->elf.got.glist = ent;
4996 }
4997 ent->got.refcount += 1;
4998 eh->tls_mask |= tls_type;
4999 }
5000 else
5001 /* This is a global offset table entry for a local symbol. */
5002 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5003 rel->r_addend, tls_type))
5004 return FALSE;
5005 break;
5006
5007 case R_PPC64_PLT16_HA:
5008 case R_PPC64_PLT16_HI:
5009 case R_PPC64_PLT16_LO:
5010 case R_PPC64_PLT32:
5011 case R_PPC64_PLT64:
5012 /* This symbol requires a procedure linkage table entry. We
5013 actually build the entry in adjust_dynamic_symbol,
5014 because this might be a case of linking PIC code without
5015 linking in any dynamic objects, in which case we don't
5016 need to generate a procedure linkage table after all. */
5017 if (h == NULL)
5018 {
5019 /* It does not make sense to have a procedure linkage
5020 table entry for a local symbol. */
5021 bfd_set_error (bfd_error_bad_value);
5022 return FALSE;
5023 }
5024 else
5025 {
5026 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5027 return FALSE;
5028 h->needs_plt = 1;
5029 if (h->root.root.string[0] == '.'
5030 && h->root.root.string[1] != '\0')
5031 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5032 }
5033 break;
5034
5035 /* The following relocations don't need to propagate the
5036 relocation if linking a shared object since they are
5037 section relative. */
5038 case R_PPC64_SECTOFF:
5039 case R_PPC64_SECTOFF_LO:
5040 case R_PPC64_SECTOFF_HI:
5041 case R_PPC64_SECTOFF_HA:
5042 case R_PPC64_SECTOFF_DS:
5043 case R_PPC64_SECTOFF_LO_DS:
5044 case R_PPC64_DTPREL16:
5045 case R_PPC64_DTPREL16_LO:
5046 case R_PPC64_DTPREL16_HI:
5047 case R_PPC64_DTPREL16_HA:
5048 case R_PPC64_DTPREL16_DS:
5049 case R_PPC64_DTPREL16_LO_DS:
5050 case R_PPC64_DTPREL16_HIGHER:
5051 case R_PPC64_DTPREL16_HIGHERA:
5052 case R_PPC64_DTPREL16_HIGHEST:
5053 case R_PPC64_DTPREL16_HIGHESTA:
5054 break;
5055
5056 /* Nor do these. */
5057 case R_PPC64_REL16:
5058 case R_PPC64_REL16_LO:
5059 case R_PPC64_REL16_HI:
5060 case R_PPC64_REL16_HA:
5061 break;
5062
5063 case R_PPC64_TOC16:
5064 case R_PPC64_TOC16_LO:
5065 case R_PPC64_TOC16_HI:
5066 case R_PPC64_TOC16_HA:
5067 case R_PPC64_TOC16_DS:
5068 case R_PPC64_TOC16_LO_DS:
5069 sec->has_toc_reloc = 1;
5070 break;
5071
5072 /* This relocation describes the C++ object vtable hierarchy.
5073 Reconstruct it for later use during GC. */
5074 case R_PPC64_GNU_VTINHERIT:
5075 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
5076 return FALSE;
5077 break;
5078
5079 /* This relocation describes which C++ vtable entries are actually
5080 used. Record for later use during GC. */
5081 case R_PPC64_GNU_VTENTRY:
5082 BFD_ASSERT (h != NULL);
5083 if (h != NULL
5084 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
5085 return FALSE;
5086 break;
5087
5088 case R_PPC64_REL14:
5089 case R_PPC64_REL14_BRTAKEN:
5090 case R_PPC64_REL14_BRNTAKEN:
5091 {
5092 asection *dest = NULL;
5093
5094 /* Heuristic: If jumping outside our section, chances are
5095 we are going to need a stub. */
5096 if (h != NULL)
5097 {
5098 /* If the sym is weak it may be overridden later, so
5099 don't assume we know where a weak sym lives. */
5100 if (h->root.type == bfd_link_hash_defined)
5101 dest = h->root.u.def.section;
5102 }
5103 else
5104 {
5105 Elf_Internal_Sym *isym;
5106
5107 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5108 abfd, r_symndx);
5109 if (isym == NULL)
5110 return FALSE;
5111
5112 dest = bfd_section_from_elf_index (abfd, isym->st_shndx);
5113 }
5114
5115 if (dest != sec)
5116 ppc64_elf_section_data (sec)->has_14bit_branch = 1;
5117 }
5118 /* Fall through. */
5119
5120 case R_PPC64_REL24:
5121 if (h != NULL && ifunc == NULL)
5122 {
5123 /* We may need a .plt entry if the function this reloc
5124 refers to is in a shared lib. */
5125 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5126 return FALSE;
5127 h->needs_plt = 1;
5128 if (h->root.root.string[0] == '.'
5129 && h->root.root.string[1] != '\0')
5130 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5131 if (h == tga || h == dottga)
5132 sec->has_tls_reloc = 1;
5133 }
5134 break;
5135
5136 case R_PPC64_TPREL64:
5137 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
5138 if (!info->executable)
5139 info->flags |= DF_STATIC_TLS;
5140 goto dotlstoc;
5141
5142 case R_PPC64_DTPMOD64:
5143 if (rel + 1 < rel_end
5144 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
5145 && rel[1].r_offset == rel->r_offset + 8)
5146 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
5147 else
5148 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
5149 goto dotlstoc;
5150
5151 case R_PPC64_DTPREL64:
5152 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
5153 if (rel != relocs
5154 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
5155 && rel[-1].r_offset == rel->r_offset - 8)
5156 /* This is the second reloc of a dtpmod, dtprel pair.
5157 Don't mark with TLS_DTPREL. */
5158 goto dodyn;
5159
5160 dotlstoc:
5161 sec->has_tls_reloc = 1;
5162 if (h != NULL)
5163 {
5164 struct ppc_link_hash_entry *eh;
5165 eh = (struct ppc_link_hash_entry *) h;
5166 eh->tls_mask |= tls_type;
5167 }
5168 else
5169 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5170 rel->r_addend, tls_type))
5171 return FALSE;
5172
5173 ppc64_sec = ppc64_elf_section_data (sec);
5174 if (ppc64_sec->sec_type != sec_toc)
5175 {
5176 bfd_size_type amt;
5177
5178 /* One extra to simplify get_tls_mask. */
5179 amt = sec->size * sizeof (unsigned) / 8 + sizeof (unsigned);
5180 ppc64_sec->u.toc.symndx = bfd_zalloc (abfd, amt);
5181 if (ppc64_sec->u.toc.symndx == NULL)
5182 return FALSE;
5183 amt = sec->size * sizeof (bfd_vma) / 8;
5184 ppc64_sec->u.toc.add = bfd_zalloc (abfd, amt);
5185 if (ppc64_sec->u.toc.add == NULL)
5186 return FALSE;
5187 BFD_ASSERT (ppc64_sec->sec_type == sec_normal);
5188 ppc64_sec->sec_type = sec_toc;
5189 }
5190 BFD_ASSERT (rel->r_offset % 8 == 0);
5191 ppc64_sec->u.toc.symndx[rel->r_offset / 8] = r_symndx;
5192 ppc64_sec->u.toc.add[rel->r_offset / 8] = rel->r_addend;
5193
5194 /* Mark the second slot of a GD or LD entry.
5195 -1 to indicate GD and -2 to indicate LD. */
5196 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
5197 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -1;
5198 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
5199 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -2;
5200 goto dodyn;
5201
5202 case R_PPC64_TPREL16:
5203 case R_PPC64_TPREL16_LO:
5204 case R_PPC64_TPREL16_HI:
5205 case R_PPC64_TPREL16_HA:
5206 case R_PPC64_TPREL16_DS:
5207 case R_PPC64_TPREL16_LO_DS:
5208 case R_PPC64_TPREL16_HIGHER:
5209 case R_PPC64_TPREL16_HIGHERA:
5210 case R_PPC64_TPREL16_HIGHEST:
5211 case R_PPC64_TPREL16_HIGHESTA:
5212 if (info->shared)
5213 {
5214 if (!info->executable)
5215 info->flags |= DF_STATIC_TLS;
5216 goto dodyn;
5217 }
5218 break;
5219
5220 case R_PPC64_ADDR64:
5221 if (opd_sym_map != NULL
5222 && rel + 1 < rel_end
5223 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
5224 {
5225 if (h != NULL)
5226 {
5227 if (h->root.root.string[0] == '.'
5228 && h->root.root.string[1] != 0
5229 && lookup_fdh ((struct ppc_link_hash_entry *) h, htab))
5230 ;
5231 else
5232 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5233 }
5234 else
5235 {
5236 asection *s;
5237 Elf_Internal_Sym *isym;
5238
5239 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5240 abfd, r_symndx);
5241 if (isym == NULL)
5242 return FALSE;
5243
5244 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5245 if (s != NULL && s != sec)
5246 opd_sym_map[rel->r_offset / 8] = s;
5247 }
5248 }
5249 /* Fall through. */
5250
5251 case R_PPC64_REL30:
5252 case R_PPC64_REL32:
5253 case R_PPC64_REL64:
5254 case R_PPC64_ADDR14:
5255 case R_PPC64_ADDR14_BRNTAKEN:
5256 case R_PPC64_ADDR14_BRTAKEN:
5257 case R_PPC64_ADDR16:
5258 case R_PPC64_ADDR16_DS:
5259 case R_PPC64_ADDR16_HA:
5260 case R_PPC64_ADDR16_HI:
5261 case R_PPC64_ADDR16_HIGHER:
5262 case R_PPC64_ADDR16_HIGHERA:
5263 case R_PPC64_ADDR16_HIGHEST:
5264 case R_PPC64_ADDR16_HIGHESTA:
5265 case R_PPC64_ADDR16_LO:
5266 case R_PPC64_ADDR16_LO_DS:
5267 case R_PPC64_ADDR24:
5268 case R_PPC64_ADDR32:
5269 case R_PPC64_UADDR16:
5270 case R_PPC64_UADDR32:
5271 case R_PPC64_UADDR64:
5272 case R_PPC64_TOC:
5273 if (h != NULL && !info->shared)
5274 /* We may need a copy reloc. */
5275 h->non_got_ref = 1;
5276
5277 /* Don't propagate .opd relocs. */
5278 if (NO_OPD_RELOCS && opd_sym_map != NULL)
5279 break;
5280
5281 /* If we are creating a shared library, and this is a reloc
5282 against a global symbol, or a non PC relative reloc
5283 against a local symbol, then we need to copy the reloc
5284 into the shared library. However, if we are linking with
5285 -Bsymbolic, we do not need to copy a reloc against a
5286 global symbol which is defined in an object we are
5287 including in the link (i.e., DEF_REGULAR is set). At
5288 this point we have not seen all the input files, so it is
5289 possible that DEF_REGULAR is not set now but will be set
5290 later (it is never cleared). In case of a weak definition,
5291 DEF_REGULAR may be cleared later by a strong definition in
5292 a shared library. We account for that possibility below by
5293 storing information in the dyn_relocs field of the hash
5294 table entry. A similar situation occurs when creating
5295 shared libraries and symbol visibility changes render the
5296 symbol local.
5297
5298 If on the other hand, we are creating an executable, we
5299 may need to keep relocations for symbols satisfied by a
5300 dynamic library if we manage to avoid copy relocs for the
5301 symbol. */
5302 dodyn:
5303 if ((info->shared
5304 && (must_be_dyn_reloc (info, r_type)
5305 || (h != NULL
5306 && (! info->symbolic
5307 || h->root.type == bfd_link_hash_defweak
5308 || !h->def_regular))))
5309 || (ELIMINATE_COPY_RELOCS
5310 && !info->shared
5311 && h != NULL
5312 && (h->root.type == bfd_link_hash_defweak
5313 || !h->def_regular))
5314 || (!info->shared
5315 && ifunc != NULL))
5316 {
5317 struct ppc_dyn_relocs *p;
5318 struct ppc_dyn_relocs **head;
5319
5320 /* We must copy these reloc types into the output file.
5321 Create a reloc section in dynobj and make room for
5322 this reloc. */
5323 if (sreloc == NULL)
5324 {
5325 sreloc = _bfd_elf_make_dynamic_reloc_section
5326 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
5327
5328 if (sreloc == NULL)
5329 return FALSE;
5330 }
5331
5332 /* If this is a global symbol, we count the number of
5333 relocations we need for this symbol. */
5334 if (h != NULL)
5335 {
5336 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
5337 }
5338 else
5339 {
5340 /* Track dynamic relocs needed for local syms too.
5341 We really need local syms available to do this
5342 easily. Oh well. */
5343 asection *s;
5344 void *vpp;
5345 Elf_Internal_Sym *isym;
5346
5347 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5348 abfd, r_symndx);
5349 if (isym == NULL)
5350 return FALSE;
5351
5352 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5353 if (s == NULL)
5354 s = sec;
5355
5356 vpp = &elf_section_data (s)->local_dynrel;
5357 head = (struct ppc_dyn_relocs **) vpp;
5358 }
5359
5360 p = *head;
5361 if (p == NULL || p->sec != sec)
5362 {
5363 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5364 if (p == NULL)
5365 return FALSE;
5366 p->next = *head;
5367 *head = p;
5368 p->sec = sec;
5369 p->count = 0;
5370 p->pc_count = 0;
5371 }
5372
5373 p->count += 1;
5374 if (!must_be_dyn_reloc (info, r_type))
5375 p->pc_count += 1;
5376 }
5377 break;
5378
5379 default:
5380 break;
5381 }
5382 }
5383
5384 return TRUE;
5385 }
5386
5387 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
5388 of the code entry point, and its section. */
5389
5390 static bfd_vma
5391 opd_entry_value (asection *opd_sec,
5392 bfd_vma offset,
5393 asection **code_sec,
5394 bfd_vma *code_off)
5395 {
5396 bfd *opd_bfd = opd_sec->owner;
5397 Elf_Internal_Rela *relocs;
5398 Elf_Internal_Rela *lo, *hi, *look;
5399 bfd_vma val;
5400
5401 /* No relocs implies we are linking a --just-symbols object. */
5402 if (opd_sec->reloc_count == 0)
5403 {
5404 if (!bfd_get_section_contents (opd_bfd, opd_sec, &val, offset, 8))
5405 return (bfd_vma) -1;
5406
5407 if (code_sec != NULL)
5408 {
5409 asection *sec, *likely = NULL;
5410 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
5411 if (sec->vma <= val
5412 && (sec->flags & SEC_LOAD) != 0
5413 && (sec->flags & SEC_ALLOC) != 0)
5414 likely = sec;
5415 if (likely != NULL)
5416 {
5417 *code_sec = likely;
5418 if (code_off != NULL)
5419 *code_off = val - likely->vma;
5420 }
5421 }
5422 return val;
5423 }
5424
5425 BFD_ASSERT (is_ppc64_elf (opd_bfd));
5426
5427 relocs = ppc64_elf_tdata (opd_bfd)->opd_relocs;
5428 if (relocs == NULL)
5429 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
5430
5431 /* Go find the opd reloc at the sym address. */
5432 lo = relocs;
5433 BFD_ASSERT (lo != NULL);
5434 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
5435 val = (bfd_vma) -1;
5436 while (lo < hi)
5437 {
5438 look = lo + (hi - lo) / 2;
5439 if (look->r_offset < offset)
5440 lo = look + 1;
5441 else if (look->r_offset > offset)
5442 hi = look;
5443 else
5444 {
5445 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (opd_bfd);
5446
5447 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
5448 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
5449 {
5450 unsigned long symndx = ELF64_R_SYM (look->r_info);
5451 asection *sec;
5452
5453 if (symndx < symtab_hdr->sh_info)
5454 {
5455 Elf_Internal_Sym *sym;
5456
5457 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
5458 if (sym == NULL)
5459 {
5460 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
5461 symtab_hdr->sh_info,
5462 0, NULL, NULL, NULL);
5463 if (sym == NULL)
5464 break;
5465 symtab_hdr->contents = (bfd_byte *) sym;
5466 }
5467
5468 sym += symndx;
5469 val = sym->st_value;
5470 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
5471 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
5472 }
5473 else
5474 {
5475 struct elf_link_hash_entry **sym_hashes;
5476 struct elf_link_hash_entry *rh;
5477
5478 sym_hashes = elf_sym_hashes (opd_bfd);
5479 rh = sym_hashes[symndx - symtab_hdr->sh_info];
5480 rh = elf_follow_link (rh);
5481 BFD_ASSERT (rh->root.type == bfd_link_hash_defined
5482 || rh->root.type == bfd_link_hash_defweak);
5483 val = rh->root.u.def.value;
5484 sec = rh->root.u.def.section;
5485 }
5486 val += look->r_addend;
5487 if (code_off != NULL)
5488 *code_off = val;
5489 if (code_sec != NULL)
5490 *code_sec = sec;
5491 if (sec != NULL && sec->output_section != NULL)
5492 val += sec->output_section->vma + sec->output_offset;
5493 }
5494 break;
5495 }
5496 }
5497
5498 return val;
5499 }
5500
5501 /* If FDH is a function descriptor symbol, return the associated code
5502 entry symbol if it is defined. Return NULL otherwise. */
5503
5504 static struct ppc_link_hash_entry *
5505 defined_code_entry (struct ppc_link_hash_entry *fdh)
5506 {
5507 if (fdh->is_func_descriptor)
5508 {
5509 struct ppc_link_hash_entry *fh = ppc_follow_link (fdh->oh);
5510 if (fh->elf.root.type == bfd_link_hash_defined
5511 || fh->elf.root.type == bfd_link_hash_defweak)
5512 return fh;
5513 }
5514 return NULL;
5515 }
5516
5517 /* If FH is a function code entry symbol, return the associated
5518 function descriptor symbol if it is defined. Return NULL otherwise. */
5519
5520 static struct ppc_link_hash_entry *
5521 defined_func_desc (struct ppc_link_hash_entry *fh)
5522 {
5523 if (fh->oh != NULL
5524 && fh->oh->is_func_descriptor)
5525 {
5526 struct ppc_link_hash_entry *fdh = ppc_follow_link (fh->oh);
5527 if (fdh->elf.root.type == bfd_link_hash_defined
5528 || fdh->elf.root.type == bfd_link_hash_defweak)
5529 return fdh;
5530 }
5531 return NULL;
5532 }
5533
5534 /* Mark all our entry sym sections, both opd and code section. */
5535
5536 static void
5537 ppc64_elf_gc_keep (struct bfd_link_info *info)
5538 {
5539 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5540 struct bfd_sym_chain *sym;
5541
5542 for (sym = info->gc_sym_list; sym != NULL; sym = sym->next)
5543 {
5544 struct ppc_link_hash_entry *eh, *fh;
5545 asection *sec;
5546
5547 eh = (struct ppc_link_hash_entry *)
5548 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, TRUE);
5549 if (eh == NULL)
5550 continue;
5551 if (eh->elf.root.type != bfd_link_hash_defined
5552 && eh->elf.root.type != bfd_link_hash_defweak)
5553 continue;
5554
5555 fh = defined_code_entry (eh);
5556 if (fh != NULL)
5557 {
5558 sec = fh->elf.root.u.def.section;
5559 sec->flags |= SEC_KEEP;
5560 }
5561 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5562 && opd_entry_value (eh->elf.root.u.def.section,
5563 eh->elf.root.u.def.value,
5564 &sec, NULL) != (bfd_vma) -1)
5565 sec->flags |= SEC_KEEP;
5566
5567 sec = eh->elf.root.u.def.section;
5568 sec->flags |= SEC_KEEP;
5569 }
5570 }
5571
5572 /* Mark sections containing dynamically referenced symbols. When
5573 building shared libraries, we must assume that any visible symbol is
5574 referenced. */
5575
5576 static bfd_boolean
5577 ppc64_elf_gc_mark_dynamic_ref (struct elf_link_hash_entry *h, void *inf)
5578 {
5579 struct bfd_link_info *info = (struct bfd_link_info *) inf;
5580 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
5581 struct ppc_link_hash_entry *fdh;
5582
5583 if (eh->elf.root.type == bfd_link_hash_warning)
5584 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
5585
5586 /* Dynamic linking info is on the func descriptor sym. */
5587 fdh = defined_func_desc (eh);
5588 if (fdh != NULL)
5589 eh = fdh;
5590
5591 if ((eh->elf.root.type == bfd_link_hash_defined
5592 || eh->elf.root.type == bfd_link_hash_defweak)
5593 && (eh->elf.ref_dynamic
5594 || (!info->executable
5595 && eh->elf.def_regular
5596 && ELF_ST_VISIBILITY (eh->elf.other) != STV_INTERNAL
5597 && ELF_ST_VISIBILITY (eh->elf.other) != STV_HIDDEN)))
5598 {
5599 asection *code_sec;
5600 struct ppc_link_hash_entry *fh;
5601
5602 eh->elf.root.u.def.section->flags |= SEC_KEEP;
5603
5604 /* Function descriptor syms cause the associated
5605 function code sym section to be marked. */
5606 fh = defined_code_entry (eh);
5607 if (fh != NULL)
5608 {
5609 code_sec = fh->elf.root.u.def.section;
5610 code_sec->flags |= SEC_KEEP;
5611 }
5612 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5613 && opd_entry_value (eh->elf.root.u.def.section,
5614 eh->elf.root.u.def.value,
5615 &code_sec, NULL) != (bfd_vma) -1)
5616 code_sec->flags |= SEC_KEEP;
5617 }
5618
5619 return TRUE;
5620 }
5621
5622 /* Return the section that should be marked against GC for a given
5623 relocation. */
5624
5625 static asection *
5626 ppc64_elf_gc_mark_hook (asection *sec,
5627 struct bfd_link_info *info ATTRIBUTE_UNUSED,
5628 Elf_Internal_Rela *rel,
5629 struct elf_link_hash_entry *h,
5630 Elf_Internal_Sym *sym)
5631 {
5632 asection *rsec;
5633
5634 /* Syms return NULL if we're marking .opd, so we avoid marking all
5635 function sections, as all functions are referenced in .opd. */
5636 rsec = NULL;
5637 if (get_opd_info (sec) != NULL)
5638 return rsec;
5639
5640 if (h != NULL)
5641 {
5642 enum elf_ppc64_reloc_type r_type;
5643 struct ppc_link_hash_entry *eh, *fh, *fdh;
5644
5645 r_type = ELF64_R_TYPE (rel->r_info);
5646 switch (r_type)
5647 {
5648 case R_PPC64_GNU_VTINHERIT:
5649 case R_PPC64_GNU_VTENTRY:
5650 break;
5651
5652 default:
5653 switch (h->root.type)
5654 {
5655 case bfd_link_hash_defined:
5656 case bfd_link_hash_defweak:
5657 eh = (struct ppc_link_hash_entry *) h;
5658 fdh = defined_func_desc (eh);
5659 if (fdh != NULL)
5660 eh = fdh;
5661
5662 /* Function descriptor syms cause the associated
5663 function code sym section to be marked. */
5664 fh = defined_code_entry (eh);
5665 if (fh != NULL)
5666 {
5667 /* They also mark their opd section. */
5668 eh->elf.root.u.def.section->gc_mark = 1;
5669
5670 rsec = fh->elf.root.u.def.section;
5671 }
5672 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5673 && opd_entry_value (eh->elf.root.u.def.section,
5674 eh->elf.root.u.def.value,
5675 &rsec, NULL) != (bfd_vma) -1)
5676 eh->elf.root.u.def.section->gc_mark = 1;
5677 else
5678 rsec = h->root.u.def.section;
5679 break;
5680
5681 case bfd_link_hash_common:
5682 rsec = h->root.u.c.p->section;
5683 break;
5684
5685 default:
5686 break;
5687 }
5688 }
5689 }
5690 else
5691 {
5692 struct _opd_sec_data *opd;
5693
5694 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
5695 opd = get_opd_info (rsec);
5696 if (opd != NULL && opd->func_sec != NULL)
5697 {
5698 rsec->gc_mark = 1;
5699
5700 rsec = opd->func_sec[(sym->st_value + rel->r_addend) / 8];
5701 }
5702 }
5703
5704 return rsec;
5705 }
5706
5707 /* Update the .got, .plt. and dynamic reloc reference counts for the
5708 section being removed. */
5709
5710 static bfd_boolean
5711 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
5712 asection *sec, const Elf_Internal_Rela *relocs)
5713 {
5714 struct ppc_link_hash_table *htab;
5715 Elf_Internal_Shdr *symtab_hdr;
5716 struct elf_link_hash_entry **sym_hashes;
5717 struct got_entry **local_got_ents;
5718 const Elf_Internal_Rela *rel, *relend;
5719
5720 if (info->relocatable)
5721 return TRUE;
5722
5723 if ((sec->flags & SEC_ALLOC) == 0)
5724 return TRUE;
5725
5726 elf_section_data (sec)->local_dynrel = NULL;
5727
5728 htab = ppc_hash_table (info);
5729 symtab_hdr = &elf_symtab_hdr (abfd);
5730 sym_hashes = elf_sym_hashes (abfd);
5731 local_got_ents = elf_local_got_ents (abfd);
5732
5733 relend = relocs + sec->reloc_count;
5734 for (rel = relocs; rel < relend; rel++)
5735 {
5736 unsigned long r_symndx;
5737 enum elf_ppc64_reloc_type r_type;
5738 struct elf_link_hash_entry *h = NULL;
5739 char tls_type = 0;
5740
5741 r_symndx = ELF64_R_SYM (rel->r_info);
5742 r_type = ELF64_R_TYPE (rel->r_info);
5743 if (r_symndx >= symtab_hdr->sh_info)
5744 {
5745 struct ppc_link_hash_entry *eh;
5746 struct ppc_dyn_relocs **pp;
5747 struct ppc_dyn_relocs *p;
5748
5749 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5750 h = elf_follow_link (h);
5751 eh = (struct ppc_link_hash_entry *) h;
5752
5753 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
5754 if (p->sec == sec)
5755 {
5756 /* Everything must go for SEC. */
5757 *pp = p->next;
5758 break;
5759 }
5760 }
5761
5762 if (is_branch_reloc (r_type))
5763 {
5764 struct plt_entry **ifunc = NULL;
5765 if (h != NULL)
5766 {
5767 if (h->type == STT_GNU_IFUNC)
5768 ifunc = &h->plt.plist;
5769 }
5770 else if (local_got_ents != NULL)
5771 {
5772 struct plt_entry **local_plt = (struct plt_entry **)
5773 (local_got_ents + symtab_hdr->sh_info);
5774 char *local_got_tls_masks = (char *)
5775 (local_plt + symtab_hdr->sh_info);
5776 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
5777 ifunc = local_plt + r_symndx;
5778 }
5779 if (ifunc != NULL)
5780 {
5781 struct plt_entry *ent;
5782
5783 for (ent = *ifunc; ent != NULL; ent = ent->next)
5784 if (ent->addend == rel->r_addend)
5785 break;
5786 if (ent == NULL)
5787 abort ();
5788 if (ent->plt.refcount > 0)
5789 ent->plt.refcount -= 1;
5790 continue;
5791 }
5792 }
5793
5794 switch (r_type)
5795 {
5796 case R_PPC64_GOT_TLSLD16:
5797 case R_PPC64_GOT_TLSLD16_LO:
5798 case R_PPC64_GOT_TLSLD16_HI:
5799 case R_PPC64_GOT_TLSLD16_HA:
5800 tls_type = TLS_TLS | TLS_LD;
5801 goto dogot;
5802
5803 case R_PPC64_GOT_TLSGD16:
5804 case R_PPC64_GOT_TLSGD16_LO:
5805 case R_PPC64_GOT_TLSGD16_HI:
5806 case R_PPC64_GOT_TLSGD16_HA:
5807 tls_type = TLS_TLS | TLS_GD;
5808 goto dogot;
5809
5810 case R_PPC64_GOT_TPREL16_DS:
5811 case R_PPC64_GOT_TPREL16_LO_DS:
5812 case R_PPC64_GOT_TPREL16_HI:
5813 case R_PPC64_GOT_TPREL16_HA:
5814 tls_type = TLS_TLS | TLS_TPREL;
5815 goto dogot;
5816
5817 case R_PPC64_GOT_DTPREL16_DS:
5818 case R_PPC64_GOT_DTPREL16_LO_DS:
5819 case R_PPC64_GOT_DTPREL16_HI:
5820 case R_PPC64_GOT_DTPREL16_HA:
5821 tls_type = TLS_TLS | TLS_DTPREL;
5822 goto dogot;
5823
5824 case R_PPC64_GOT16:
5825 case R_PPC64_GOT16_DS:
5826 case R_PPC64_GOT16_HA:
5827 case R_PPC64_GOT16_HI:
5828 case R_PPC64_GOT16_LO:
5829 case R_PPC64_GOT16_LO_DS:
5830 dogot:
5831 {
5832 struct got_entry *ent;
5833
5834 if (h != NULL)
5835 ent = h->got.glist;
5836 else
5837 ent = local_got_ents[r_symndx];
5838
5839 for (; ent != NULL; ent = ent->next)
5840 if (ent->addend == rel->r_addend
5841 && ent->owner == abfd
5842 && ent->tls_type == tls_type)
5843 break;
5844 if (ent == NULL)
5845 abort ();
5846 if (ent->got.refcount > 0)
5847 ent->got.refcount -= 1;
5848 }
5849 break;
5850
5851 case R_PPC64_PLT16_HA:
5852 case R_PPC64_PLT16_HI:
5853 case R_PPC64_PLT16_LO:
5854 case R_PPC64_PLT32:
5855 case R_PPC64_PLT64:
5856 case R_PPC64_REL14:
5857 case R_PPC64_REL14_BRNTAKEN:
5858 case R_PPC64_REL14_BRTAKEN:
5859 case R_PPC64_REL24:
5860 if (h != NULL)
5861 {
5862 struct plt_entry *ent;
5863
5864 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5865 if (ent->addend == rel->r_addend)
5866 break;
5867 if (ent != NULL && ent->plt.refcount > 0)
5868 ent->plt.refcount -= 1;
5869 }
5870 break;
5871
5872 default:
5873 break;
5874 }
5875 }
5876 return TRUE;
5877 }
5878
5879 /* The maximum size of .sfpr. */
5880 #define SFPR_MAX (218*4)
5881
5882 struct sfpr_def_parms
5883 {
5884 const char name[12];
5885 unsigned char lo, hi;
5886 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
5887 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
5888 };
5889
5890 /* Auto-generate _save*, _rest* functions in .sfpr. */
5891
5892 static unsigned int
5893 sfpr_define (struct bfd_link_info *info, const struct sfpr_def_parms *parm)
5894 {
5895 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5896 unsigned int i;
5897 size_t len = strlen (parm->name);
5898 bfd_boolean writing = FALSE;
5899 char sym[16];
5900
5901 memcpy (sym, parm->name, len);
5902 sym[len + 2] = 0;
5903
5904 for (i = parm->lo; i <= parm->hi; i++)
5905 {
5906 struct elf_link_hash_entry *h;
5907
5908 sym[len + 0] = i / 10 + '0';
5909 sym[len + 1] = i % 10 + '0';
5910 h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
5911 if (h != NULL
5912 && !h->def_regular)
5913 {
5914 h->root.type = bfd_link_hash_defined;
5915 h->root.u.def.section = htab->sfpr;
5916 h->root.u.def.value = htab->sfpr->size;
5917 h->type = STT_FUNC;
5918 h->def_regular = 1;
5919 _bfd_elf_link_hash_hide_symbol (info, h, TRUE);
5920 writing = TRUE;
5921 if (htab->sfpr->contents == NULL)
5922 {
5923 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
5924 if (htab->sfpr->contents == NULL)
5925 return FALSE;
5926 }
5927 }
5928 if (writing)
5929 {
5930 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
5931 if (i != parm->hi)
5932 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
5933 else
5934 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
5935 htab->sfpr->size = p - htab->sfpr->contents;
5936 }
5937 }
5938
5939 return TRUE;
5940 }
5941
5942 static bfd_byte *
5943 savegpr0 (bfd *abfd, bfd_byte *p, int r)
5944 {
5945 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5946 return p + 4;
5947 }
5948
5949 static bfd_byte *
5950 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
5951 {
5952 p = savegpr0 (abfd, p, r);
5953 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
5954 p = p + 4;
5955 bfd_put_32 (abfd, BLR, p);
5956 return p + 4;
5957 }
5958
5959 static bfd_byte *
5960 restgpr0 (bfd *abfd, bfd_byte *p, int r)
5961 {
5962 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5963 return p + 4;
5964 }
5965
5966 static bfd_byte *
5967 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
5968 {
5969 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
5970 p = p + 4;
5971 p = restgpr0 (abfd, p, r);
5972 bfd_put_32 (abfd, MTLR_R0, p);
5973 p = p + 4;
5974 if (r == 29)
5975 {
5976 p = restgpr0 (abfd, p, 30);
5977 p = restgpr0 (abfd, p, 31);
5978 }
5979 bfd_put_32 (abfd, BLR, p);
5980 return p + 4;
5981 }
5982
5983 static bfd_byte *
5984 savegpr1 (bfd *abfd, bfd_byte *p, int r)
5985 {
5986 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5987 return p + 4;
5988 }
5989
5990 static bfd_byte *
5991 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
5992 {
5993 p = savegpr1 (abfd, p, r);
5994 bfd_put_32 (abfd, BLR, p);
5995 return p + 4;
5996 }
5997
5998 static bfd_byte *
5999 restgpr1 (bfd *abfd, bfd_byte *p, int r)
6000 {
6001 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6002 return p + 4;
6003 }
6004
6005 static bfd_byte *
6006 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
6007 {
6008 p = restgpr1 (abfd, p, r);
6009 bfd_put_32 (abfd, BLR, p);
6010 return p + 4;
6011 }
6012
6013 static bfd_byte *
6014 savefpr (bfd *abfd, bfd_byte *p, int r)
6015 {
6016 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6017 return p + 4;
6018 }
6019
6020 static bfd_byte *
6021 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
6022 {
6023 p = savefpr (abfd, p, r);
6024 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
6025 p = p + 4;
6026 bfd_put_32 (abfd, BLR, p);
6027 return p + 4;
6028 }
6029
6030 static bfd_byte *
6031 restfpr (bfd *abfd, bfd_byte *p, int r)
6032 {
6033 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6034 return p + 4;
6035 }
6036
6037 static bfd_byte *
6038 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
6039 {
6040 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
6041 p = p + 4;
6042 p = restfpr (abfd, p, r);
6043 bfd_put_32 (abfd, MTLR_R0, p);
6044 p = p + 4;
6045 if (r == 29)
6046 {
6047 p = restfpr (abfd, p, 30);
6048 p = restfpr (abfd, p, 31);
6049 }
6050 bfd_put_32 (abfd, BLR, p);
6051 return p + 4;
6052 }
6053
6054 static bfd_byte *
6055 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
6056 {
6057 p = savefpr (abfd, p, r);
6058 bfd_put_32 (abfd, BLR, p);
6059 return p + 4;
6060 }
6061
6062 static bfd_byte *
6063 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
6064 {
6065 p = restfpr (abfd, p, r);
6066 bfd_put_32 (abfd, BLR, p);
6067 return p + 4;
6068 }
6069
6070 static bfd_byte *
6071 savevr (bfd *abfd, bfd_byte *p, int r)
6072 {
6073 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6074 p = p + 4;
6075 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
6076 return p + 4;
6077 }
6078
6079 static bfd_byte *
6080 savevr_tail (bfd *abfd, bfd_byte *p, int r)
6081 {
6082 p = savevr (abfd, p, r);
6083 bfd_put_32 (abfd, BLR, p);
6084 return p + 4;
6085 }
6086
6087 static bfd_byte *
6088 restvr (bfd *abfd, bfd_byte *p, int r)
6089 {
6090 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6091 p = p + 4;
6092 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
6093 return p + 4;
6094 }
6095
6096 static bfd_byte *
6097 restvr_tail (bfd *abfd, bfd_byte *p, int r)
6098 {
6099 p = restvr (abfd, p, r);
6100 bfd_put_32 (abfd, BLR, p);
6101 return p + 4;
6102 }
6103
6104 /* Called via elf_link_hash_traverse to transfer dynamic linking
6105 information on function code symbol entries to their corresponding
6106 function descriptor symbol entries. */
6107
6108 static bfd_boolean
6109 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
6110 {
6111 struct bfd_link_info *info;
6112 struct ppc_link_hash_table *htab;
6113 struct plt_entry *ent;
6114 struct ppc_link_hash_entry *fh;
6115 struct ppc_link_hash_entry *fdh;
6116 bfd_boolean force_local;
6117
6118 fh = (struct ppc_link_hash_entry *) h;
6119 if (fh->elf.root.type == bfd_link_hash_indirect)
6120 return TRUE;
6121
6122 if (fh->elf.root.type == bfd_link_hash_warning)
6123 fh = (struct ppc_link_hash_entry *) fh->elf.root.u.i.link;
6124
6125 info = inf;
6126 htab = ppc_hash_table (info);
6127
6128 /* Resolve undefined references to dot-symbols as the value
6129 in the function descriptor, if we have one in a regular object.
6130 This is to satisfy cases like ".quad .foo". Calls to functions
6131 in dynamic objects are handled elsewhere. */
6132 if (fh->elf.root.type == bfd_link_hash_undefweak
6133 && fh->was_undefined
6134 && (fdh = defined_func_desc (fh)) != NULL
6135 && get_opd_info (fdh->elf.root.u.def.section) != NULL
6136 && opd_entry_value (fdh->elf.root.u.def.section,
6137 fdh->elf.root.u.def.value,
6138 &fh->elf.root.u.def.section,
6139 &fh->elf.root.u.def.value) != (bfd_vma) -1)
6140 {
6141 fh->elf.root.type = fdh->elf.root.type;
6142 fh->elf.forced_local = 1;
6143 fh->elf.def_regular = fdh->elf.def_regular;
6144 fh->elf.def_dynamic = fdh->elf.def_dynamic;
6145 }
6146
6147 /* If this is a function code symbol, transfer dynamic linking
6148 information to the function descriptor symbol. */
6149 if (!fh->is_func)
6150 return TRUE;
6151
6152 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
6153 if (ent->plt.refcount > 0)
6154 break;
6155 if (ent == NULL
6156 || fh->elf.root.root.string[0] != '.'
6157 || fh->elf.root.root.string[1] == '\0')
6158 return TRUE;
6159
6160 /* Find the corresponding function descriptor symbol. Create it
6161 as undefined if necessary. */
6162
6163 fdh = lookup_fdh (fh, htab);
6164 if (fdh == NULL
6165 && !info->executable
6166 && (fh->elf.root.type == bfd_link_hash_undefined
6167 || fh->elf.root.type == bfd_link_hash_undefweak))
6168 {
6169 fdh = make_fdh (info, fh);
6170 if (fdh == NULL)
6171 return FALSE;
6172 }
6173
6174 /* Fake function descriptors are made undefweak. If the function
6175 code symbol is strong undefined, make the fake sym the same.
6176 If the function code symbol is defined, then force the fake
6177 descriptor local; We can't support overriding of symbols in a
6178 shared library on a fake descriptor. */
6179
6180 if (fdh != NULL
6181 && fdh->fake
6182 && fdh->elf.root.type == bfd_link_hash_undefweak)
6183 {
6184 if (fh->elf.root.type == bfd_link_hash_undefined)
6185 {
6186 fdh->elf.root.type = bfd_link_hash_undefined;
6187 bfd_link_add_undef (&htab->elf.root, &fdh->elf.root);
6188 }
6189 else if (fh->elf.root.type == bfd_link_hash_defined
6190 || fh->elf.root.type == bfd_link_hash_defweak)
6191 {
6192 _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE);
6193 }
6194 }
6195
6196 if (fdh != NULL
6197 && !fdh->elf.forced_local
6198 && (!info->executable
6199 || fdh->elf.def_dynamic
6200 || fdh->elf.ref_dynamic
6201 || (fdh->elf.root.type == bfd_link_hash_undefweak
6202 && ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT)))
6203 {
6204 if (fdh->elf.dynindx == -1)
6205 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
6206 return FALSE;
6207 fdh->elf.ref_regular |= fh->elf.ref_regular;
6208 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
6209 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
6210 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
6211 if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT)
6212 {
6213 move_plt_plist (fh, fdh);
6214 fdh->elf.needs_plt = 1;
6215 }
6216 fdh->is_func_descriptor = 1;
6217 fdh->oh = fh;
6218 fh->oh = fdh;
6219 }
6220
6221 /* Now that the info is on the function descriptor, clear the
6222 function code sym info. Any function code syms for which we
6223 don't have a definition in a regular file, we force local.
6224 This prevents a shared library from exporting syms that have
6225 been imported from another library. Function code syms that
6226 are really in the library we must leave global to prevent the
6227 linker dragging in a definition from a static library. */
6228 force_local = (!fh->elf.def_regular
6229 || fdh == NULL
6230 || !fdh->elf.def_regular
6231 || fdh->elf.forced_local);
6232 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
6233
6234 return TRUE;
6235 }
6236
6237 /* Called near the start of bfd_elf_size_dynamic_sections. We use
6238 this hook to a) provide some gcc support functions, and b) transfer
6239 dynamic linking information gathered so far on function code symbol
6240 entries, to their corresponding function descriptor symbol entries. */
6241
6242 static bfd_boolean
6243 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
6244 struct bfd_link_info *info)
6245 {
6246 struct ppc_link_hash_table *htab;
6247 unsigned int i;
6248 const struct sfpr_def_parms funcs[] =
6249 {
6250 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
6251 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
6252 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
6253 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
6254 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
6255 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
6256 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
6257 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
6258 { "._savef", 14, 31, savefpr, savefpr1_tail },
6259 { "._restf", 14, 31, restfpr, restfpr1_tail },
6260 { "_savevr_", 20, 31, savevr, savevr_tail },
6261 { "_restvr_", 20, 31, restvr, restvr_tail }
6262 };
6263
6264 htab = ppc_hash_table (info);
6265 if (htab->sfpr == NULL)
6266 /* We don't have any relocs. */
6267 return TRUE;
6268
6269 /* Provide any missing _save* and _rest* functions. */
6270 htab->sfpr->size = 0;
6271 for (i = 0; i < sizeof (funcs) / sizeof (funcs[0]); i++)
6272 if (!sfpr_define (info, &funcs[i]))
6273 return FALSE;
6274
6275 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
6276
6277 if (htab->sfpr->size == 0)
6278 htab->sfpr->flags |= SEC_EXCLUDE;
6279
6280 return TRUE;
6281 }
6282
6283 /* Adjust a symbol defined by a dynamic object and referenced by a
6284 regular object. The current definition is in some section of the
6285 dynamic object, but we're not including those sections. We have to
6286 change the definition to something the rest of the link can
6287 understand. */
6288
6289 static bfd_boolean
6290 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
6291 struct elf_link_hash_entry *h)
6292 {
6293 struct ppc_link_hash_table *htab;
6294 asection *s;
6295
6296 htab = ppc_hash_table (info);
6297
6298 /* Deal with function syms. */
6299 if (h->type == STT_FUNC
6300 || h->type == STT_GNU_IFUNC
6301 || h->needs_plt)
6302 {
6303 /* Clear procedure linkage table information for any symbol that
6304 won't need a .plt entry. */
6305 struct plt_entry *ent;
6306 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6307 if (ent->plt.refcount > 0)
6308 break;
6309 if (ent == NULL
6310 || (h->type != STT_GNU_IFUNC
6311 && (SYMBOL_CALLS_LOCAL (info, h)
6312 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
6313 && h->root.type == bfd_link_hash_undefweak))))
6314 {
6315 h->plt.plist = NULL;
6316 h->needs_plt = 0;
6317 }
6318 }
6319 else
6320 h->plt.plist = NULL;
6321
6322 /* If this is a weak symbol, and there is a real definition, the
6323 processor independent code will have arranged for us to see the
6324 real definition first, and we can just use the same value. */
6325 if (h->u.weakdef != NULL)
6326 {
6327 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
6328 || h->u.weakdef->root.type == bfd_link_hash_defweak);
6329 h->root.u.def.section = h->u.weakdef->root.u.def.section;
6330 h->root.u.def.value = h->u.weakdef->root.u.def.value;
6331 if (ELIMINATE_COPY_RELOCS)
6332 h->non_got_ref = h->u.weakdef->non_got_ref;
6333 return TRUE;
6334 }
6335
6336 /* If we are creating a shared library, we must presume that the
6337 only references to the symbol are via the global offset table.
6338 For such cases we need not do anything here; the relocations will
6339 be handled correctly by relocate_section. */
6340 if (info->shared)
6341 return TRUE;
6342
6343 /* If there are no references to this symbol that do not use the
6344 GOT, we don't need to generate a copy reloc. */
6345 if (!h->non_got_ref)
6346 return TRUE;
6347
6348 /* Don't generate a copy reloc for symbols defined in the executable. */
6349 if (!h->def_dynamic || !h->ref_regular || h->def_regular)
6350 return TRUE;
6351
6352 if (ELIMINATE_COPY_RELOCS)
6353 {
6354 struct ppc_link_hash_entry * eh;
6355 struct ppc_dyn_relocs *p;
6356
6357 eh = (struct ppc_link_hash_entry *) h;
6358 for (p = eh->dyn_relocs; p != NULL; p = p->next)
6359 {
6360 s = p->sec->output_section;
6361 if (s != NULL && (s->flags & SEC_READONLY) != 0)
6362 break;
6363 }
6364
6365 /* If we didn't find any dynamic relocs in read-only sections, then
6366 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
6367 if (p == NULL)
6368 {
6369 h->non_got_ref = 0;
6370 return TRUE;
6371 }
6372 }
6373
6374 if (h->plt.plist != NULL)
6375 {
6376 /* We should never get here, but unfortunately there are versions
6377 of gcc out there that improperly (for this ABI) put initialized
6378 function pointers, vtable refs and suchlike in read-only
6379 sections. Allow them to proceed, but warn that this might
6380 break at runtime. */
6381 (*_bfd_error_handler)
6382 (_("copy reloc against `%s' requires lazy plt linking; "
6383 "avoid setting LD_BIND_NOW=1 or upgrade gcc"),
6384 h->root.root.string);
6385 }
6386
6387 /* This is a reference to a symbol defined by a dynamic object which
6388 is not a function. */
6389
6390 if (h->size == 0)
6391 {
6392 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
6393 h->root.root.string);
6394 return TRUE;
6395 }
6396
6397 /* We must allocate the symbol in our .dynbss section, which will
6398 become part of the .bss section of the executable. There will be
6399 an entry for this symbol in the .dynsym section. The dynamic
6400 object will contain position independent code, so all references
6401 from the dynamic object to this symbol will go through the global
6402 offset table. The dynamic linker will use the .dynsym entry to
6403 determine the address it must put in the global offset table, so
6404 both the dynamic object and the regular object will refer to the
6405 same memory location for the variable. */
6406
6407 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
6408 to copy the initial value out of the dynamic object and into the
6409 runtime process image. We need to remember the offset into the
6410 .rela.bss section we are going to use. */
6411 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
6412 {
6413 htab->relbss->size += sizeof (Elf64_External_Rela);
6414 h->needs_copy = 1;
6415 }
6416
6417 s = htab->dynbss;
6418
6419 return _bfd_elf_adjust_dynamic_copy (h, s);
6420 }
6421
6422 /* If given a function descriptor symbol, hide both the function code
6423 sym and the descriptor. */
6424 static void
6425 ppc64_elf_hide_symbol (struct bfd_link_info *info,
6426 struct elf_link_hash_entry *h,
6427 bfd_boolean force_local)
6428 {
6429 struct ppc_link_hash_entry *eh;
6430 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
6431
6432 eh = (struct ppc_link_hash_entry *) h;
6433 if (eh->is_func_descriptor)
6434 {
6435 struct ppc_link_hash_entry *fh = eh->oh;
6436
6437 if (fh == NULL)
6438 {
6439 const char *p, *q;
6440 struct ppc_link_hash_table *htab;
6441 char save;
6442
6443 /* We aren't supposed to use alloca in BFD because on
6444 systems which do not have alloca the version in libiberty
6445 calls xmalloc, which might cause the program to crash
6446 when it runs out of memory. This function doesn't have a
6447 return status, so there's no way to gracefully return an
6448 error. So cheat. We know that string[-1] can be safely
6449 accessed; It's either a string in an ELF string table,
6450 or allocated in an objalloc structure. */
6451
6452 p = eh->elf.root.root.string - 1;
6453 save = *p;
6454 *(char *) p = '.';
6455 htab = ppc_hash_table (info);
6456 fh = (struct ppc_link_hash_entry *)
6457 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
6458 *(char *) p = save;
6459
6460 /* Unfortunately, if it so happens that the string we were
6461 looking for was allocated immediately before this string,
6462 then we overwrote the string terminator. That's the only
6463 reason the lookup should fail. */
6464 if (fh == NULL)
6465 {
6466 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
6467 while (q >= eh->elf.root.root.string && *q == *p)
6468 --q, --p;
6469 if (q < eh->elf.root.root.string && *p == '.')
6470 fh = (struct ppc_link_hash_entry *)
6471 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
6472 }
6473 if (fh != NULL)
6474 {
6475 eh->oh = fh;
6476 fh->oh = eh;
6477 }
6478 }
6479 if (fh != NULL)
6480 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
6481 }
6482 }
6483
6484 static bfd_boolean
6485 get_sym_h (struct elf_link_hash_entry **hp,
6486 Elf_Internal_Sym **symp,
6487 asection **symsecp,
6488 char **tls_maskp,
6489 Elf_Internal_Sym **locsymsp,
6490 unsigned long r_symndx,
6491 bfd *ibfd)
6492 {
6493 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
6494
6495 if (r_symndx >= symtab_hdr->sh_info)
6496 {
6497 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
6498 struct elf_link_hash_entry *h;
6499
6500 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
6501 h = elf_follow_link (h);
6502
6503 if (hp != NULL)
6504 *hp = h;
6505
6506 if (symp != NULL)
6507 *symp = NULL;
6508
6509 if (symsecp != NULL)
6510 {
6511 asection *symsec = NULL;
6512 if (h->root.type == bfd_link_hash_defined
6513 || h->root.type == bfd_link_hash_defweak)
6514 symsec = h->root.u.def.section;
6515 *symsecp = symsec;
6516 }
6517
6518 if (tls_maskp != NULL)
6519 {
6520 struct ppc_link_hash_entry *eh;
6521
6522 eh = (struct ppc_link_hash_entry *) h;
6523 *tls_maskp = &eh->tls_mask;
6524 }
6525 }
6526 else
6527 {
6528 Elf_Internal_Sym *sym;
6529 Elf_Internal_Sym *locsyms = *locsymsp;
6530
6531 if (locsyms == NULL)
6532 {
6533 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
6534 if (locsyms == NULL)
6535 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
6536 symtab_hdr->sh_info,
6537 0, NULL, NULL, NULL);
6538 if (locsyms == NULL)
6539 return FALSE;
6540 *locsymsp = locsyms;
6541 }
6542 sym = locsyms + r_symndx;
6543
6544 if (hp != NULL)
6545 *hp = NULL;
6546
6547 if (symp != NULL)
6548 *symp = sym;
6549
6550 if (symsecp != NULL)
6551 *symsecp = bfd_section_from_elf_index (ibfd, sym->st_shndx);
6552
6553 if (tls_maskp != NULL)
6554 {
6555 struct got_entry **lgot_ents;
6556 char *tls_mask;
6557
6558 tls_mask = NULL;
6559 lgot_ents = elf_local_got_ents (ibfd);
6560 if (lgot_ents != NULL)
6561 {
6562 struct plt_entry **local_plt = (struct plt_entry **)
6563 (lgot_ents + symtab_hdr->sh_info);
6564 char *lgot_masks = (char *)
6565 (local_plt + symtab_hdr->sh_info);
6566 tls_mask = &lgot_masks[r_symndx];
6567 }
6568 *tls_maskp = tls_mask;
6569 }
6570 }
6571 return TRUE;
6572 }
6573
6574 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
6575 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
6576 type suitable for optimization, and 1 otherwise. */
6577
6578 static int
6579 get_tls_mask (char **tls_maskp,
6580 unsigned long *toc_symndx,
6581 bfd_vma *toc_addend,
6582 Elf_Internal_Sym **locsymsp,
6583 const Elf_Internal_Rela *rel,
6584 bfd *ibfd)
6585 {
6586 unsigned long r_symndx;
6587 int next_r;
6588 struct elf_link_hash_entry *h;
6589 Elf_Internal_Sym *sym;
6590 asection *sec;
6591 bfd_vma off;
6592
6593 r_symndx = ELF64_R_SYM (rel->r_info);
6594 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
6595 return 0;
6596
6597 if ((*tls_maskp != NULL && **tls_maskp != 0)
6598 || sec == NULL
6599 || ppc64_elf_section_data (sec)->sec_type != sec_toc)
6600 return 1;
6601
6602 /* Look inside a TOC section too. */
6603 if (h != NULL)
6604 {
6605 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
6606 off = h->root.u.def.value;
6607 }
6608 else
6609 off = sym->st_value;
6610 off += rel->r_addend;
6611 BFD_ASSERT (off % 8 == 0);
6612 r_symndx = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8];
6613 next_r = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8 + 1];
6614 if (toc_symndx != NULL)
6615 *toc_symndx = r_symndx;
6616 if (toc_addend != NULL)
6617 *toc_addend = ppc64_elf_section_data (sec)->u.toc.add[off / 8];
6618 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
6619 return 0;
6620 if ((h == NULL
6621 || ((h->root.type == bfd_link_hash_defined
6622 || h->root.type == bfd_link_hash_defweak)
6623 && !h->def_dynamic))
6624 && (next_r == -1 || next_r == -2))
6625 return 1 - next_r;
6626 return 1;
6627 }
6628
6629 /* Adjust all global syms defined in opd sections. In gcc generated
6630 code for the old ABI, these will already have been done. */
6631
6632 static bfd_boolean
6633 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
6634 {
6635 struct ppc_link_hash_entry *eh;
6636 asection *sym_sec;
6637 struct _opd_sec_data *opd;
6638
6639 if (h->root.type == bfd_link_hash_indirect)
6640 return TRUE;
6641
6642 if (h->root.type == bfd_link_hash_warning)
6643 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6644
6645 if (h->root.type != bfd_link_hash_defined
6646 && h->root.type != bfd_link_hash_defweak)
6647 return TRUE;
6648
6649 eh = (struct ppc_link_hash_entry *) h;
6650 if (eh->adjust_done)
6651 return TRUE;
6652
6653 sym_sec = eh->elf.root.u.def.section;
6654 opd = get_opd_info (sym_sec);
6655 if (opd != NULL && opd->adjust != NULL)
6656 {
6657 long adjust = opd->adjust[eh->elf.root.u.def.value / 8];
6658 if (adjust == -1)
6659 {
6660 /* This entry has been deleted. */
6661 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
6662 if (dsec == NULL)
6663 {
6664 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
6665 if (elf_discarded_section (dsec))
6666 {
6667 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
6668 break;
6669 }
6670 }
6671 eh->elf.root.u.def.value = 0;
6672 eh->elf.root.u.def.section = dsec;
6673 }
6674 else
6675 eh->elf.root.u.def.value += adjust;
6676 eh->adjust_done = 1;
6677 }
6678 return TRUE;
6679 }
6680
6681 /* Handles decrementing dynamic reloc counts for the reloc specified by
6682 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM_SEC
6683 have already been determined. */
6684
6685 static bfd_boolean
6686 dec_dynrel_count (bfd_vma r_info,
6687 asection *sec,
6688 struct bfd_link_info *info,
6689 Elf_Internal_Sym **local_syms,
6690 struct elf_link_hash_entry *h,
6691 asection *sym_sec)
6692 {
6693 enum elf_ppc64_reloc_type r_type;
6694 struct ppc_dyn_relocs *p;
6695 struct ppc_dyn_relocs **pp;
6696
6697 /* Can this reloc be dynamic? This switch, and later tests here
6698 should be kept in sync with the code in check_relocs. */
6699 r_type = ELF64_R_TYPE (r_info);
6700 switch (r_type)
6701 {
6702 default:
6703 return TRUE;
6704
6705 case R_PPC64_TPREL16:
6706 case R_PPC64_TPREL16_LO:
6707 case R_PPC64_TPREL16_HI:
6708 case R_PPC64_TPREL16_HA:
6709 case R_PPC64_TPREL16_DS:
6710 case R_PPC64_TPREL16_LO_DS:
6711 case R_PPC64_TPREL16_HIGHER:
6712 case R_PPC64_TPREL16_HIGHERA:
6713 case R_PPC64_TPREL16_HIGHEST:
6714 case R_PPC64_TPREL16_HIGHESTA:
6715 if (!info->shared)
6716 return TRUE;
6717
6718 case R_PPC64_TPREL64:
6719 case R_PPC64_DTPMOD64:
6720 case R_PPC64_DTPREL64:
6721 case R_PPC64_ADDR64:
6722 case R_PPC64_REL30:
6723 case R_PPC64_REL32:
6724 case R_PPC64_REL64:
6725 case R_PPC64_ADDR14:
6726 case R_PPC64_ADDR14_BRNTAKEN:
6727 case R_PPC64_ADDR14_BRTAKEN:
6728 case R_PPC64_ADDR16:
6729 case R_PPC64_ADDR16_DS:
6730 case R_PPC64_ADDR16_HA:
6731 case R_PPC64_ADDR16_HI:
6732 case R_PPC64_ADDR16_HIGHER:
6733 case R_PPC64_ADDR16_HIGHERA:
6734 case R_PPC64_ADDR16_HIGHEST:
6735 case R_PPC64_ADDR16_HIGHESTA:
6736 case R_PPC64_ADDR16_LO:
6737 case R_PPC64_ADDR16_LO_DS:
6738 case R_PPC64_ADDR24:
6739 case R_PPC64_ADDR32:
6740 case R_PPC64_UADDR16:
6741 case R_PPC64_UADDR32:
6742 case R_PPC64_UADDR64:
6743 case R_PPC64_TOC:
6744 break;
6745 }
6746
6747 if (local_syms != NULL)
6748 {
6749 unsigned long r_symndx;
6750 Elf_Internal_Sym *sym;
6751 bfd *ibfd = sec->owner;
6752
6753 r_symndx = ELF64_R_SYM (r_info);
6754 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
6755 return FALSE;
6756 }
6757
6758 if ((info->shared
6759 && (must_be_dyn_reloc (info, r_type)
6760 || (h != NULL
6761 && (!info->symbolic
6762 || h->root.type == bfd_link_hash_defweak
6763 || !h->def_regular))))
6764 || (ELIMINATE_COPY_RELOCS
6765 && !info->shared
6766 && h != NULL
6767 && (h->root.type == bfd_link_hash_defweak
6768 || !h->def_regular)))
6769 ;
6770 else
6771 return TRUE;
6772
6773 if (h != NULL)
6774 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
6775 else
6776 {
6777 if (sym_sec != NULL)
6778 {
6779 void *vpp = &elf_section_data (sym_sec)->local_dynrel;
6780 pp = (struct ppc_dyn_relocs **) vpp;
6781 }
6782 else
6783 {
6784 void *vpp = &elf_section_data (sec)->local_dynrel;
6785 pp = (struct ppc_dyn_relocs **) vpp;
6786 }
6787
6788 /* elf_gc_sweep may have already removed all dyn relocs associated
6789 with local syms for a given section. Don't report a dynreloc
6790 miscount. */
6791 if (*pp == NULL)
6792 return TRUE;
6793 }
6794
6795 while ((p = *pp) != NULL)
6796 {
6797 if (p->sec == sec)
6798 {
6799 if (!must_be_dyn_reloc (info, r_type))
6800 p->pc_count -= 1;
6801 p->count -= 1;
6802 if (p->count == 0)
6803 *pp = p->next;
6804 return TRUE;
6805 }
6806 pp = &p->next;
6807 }
6808
6809 (*_bfd_error_handler) (_("dynreloc miscount for %B, section %A"),
6810 sec->owner, sec);
6811 bfd_set_error (bfd_error_bad_value);
6812 return FALSE;
6813 }
6814
6815 /* Remove unused Official Procedure Descriptor entries. Currently we
6816 only remove those associated with functions in discarded link-once
6817 sections, or weakly defined functions that have been overridden. It
6818 would be possible to remove many more entries for statically linked
6819 applications. */
6820
6821 bfd_boolean
6822 ppc64_elf_edit_opd (bfd *obfd, struct bfd_link_info *info,
6823 bfd_boolean non_overlapping)
6824 {
6825 bfd *ibfd;
6826 bfd_boolean some_edited = FALSE;
6827 asection *need_pad = NULL;
6828
6829 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6830 {
6831 asection *sec;
6832 Elf_Internal_Rela *relstart, *rel, *relend;
6833 Elf_Internal_Shdr *symtab_hdr;
6834 Elf_Internal_Sym *local_syms;
6835 struct elf_link_hash_entry **sym_hashes;
6836 bfd_vma offset;
6837 struct _opd_sec_data *opd;
6838 bfd_boolean need_edit, add_aux_fields;
6839 bfd_size_type cnt_16b = 0;
6840
6841 sec = bfd_get_section_by_name (ibfd, ".opd");
6842 if (sec == NULL || sec->size == 0)
6843 continue;
6844
6845 if (sec->sec_info_type == ELF_INFO_TYPE_JUST_SYMS)
6846 continue;
6847
6848 if (sec->output_section == bfd_abs_section_ptr)
6849 continue;
6850
6851 /* Look through the section relocs. */
6852 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
6853 continue;
6854
6855 local_syms = NULL;
6856 symtab_hdr = &elf_symtab_hdr (ibfd);
6857 sym_hashes = elf_sym_hashes (ibfd);
6858
6859 /* Read the relocations. */
6860 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
6861 info->keep_memory);
6862 if (relstart == NULL)
6863 return FALSE;
6864
6865 /* First run through the relocs to check they are sane, and to
6866 determine whether we need to edit this opd section. */
6867 need_edit = FALSE;
6868 need_pad = sec;
6869 offset = 0;
6870 relend = relstart + sec->reloc_count;
6871 for (rel = relstart; rel < relend; )
6872 {
6873 enum elf_ppc64_reloc_type r_type;
6874 unsigned long r_symndx;
6875 asection *sym_sec;
6876 struct elf_link_hash_entry *h;
6877 Elf_Internal_Sym *sym;
6878
6879 /* .opd contains a regular array of 16 or 24 byte entries. We're
6880 only interested in the reloc pointing to a function entry
6881 point. */
6882 if (rel->r_offset != offset
6883 || rel + 1 >= relend
6884 || (rel + 1)->r_offset != offset + 8)
6885 {
6886 /* If someone messes with .opd alignment then after a
6887 "ld -r" we might have padding in the middle of .opd.
6888 Also, there's nothing to prevent someone putting
6889 something silly in .opd with the assembler. No .opd
6890 optimization for them! */
6891 broken_opd:
6892 (*_bfd_error_handler)
6893 (_("%B: .opd is not a regular array of opd entries"), ibfd);
6894 need_edit = FALSE;
6895 break;
6896 }
6897
6898 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
6899 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
6900 {
6901 (*_bfd_error_handler)
6902 (_("%B: unexpected reloc type %u in .opd section"),
6903 ibfd, r_type);
6904 need_edit = FALSE;
6905 break;
6906 }
6907
6908 r_symndx = ELF64_R_SYM (rel->r_info);
6909 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6910 r_symndx, ibfd))
6911 goto error_ret;
6912
6913 if (sym_sec == NULL || sym_sec->owner == NULL)
6914 {
6915 const char *sym_name;
6916 if (h != NULL)
6917 sym_name = h->root.root.string;
6918 else
6919 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
6920 sym_sec);
6921
6922 (*_bfd_error_handler)
6923 (_("%B: undefined sym `%s' in .opd section"),
6924 ibfd, sym_name);
6925 need_edit = FALSE;
6926 break;
6927 }
6928
6929 /* opd entries are always for functions defined in the
6930 current input bfd. If the symbol isn't defined in the
6931 input bfd, then we won't be using the function in this
6932 bfd; It must be defined in a linkonce section in another
6933 bfd, or is weak. It's also possible that we are
6934 discarding the function due to a linker script /DISCARD/,
6935 which we test for via the output_section. */
6936 if (sym_sec->owner != ibfd
6937 || sym_sec->output_section == bfd_abs_section_ptr)
6938 need_edit = TRUE;
6939
6940 rel += 2;
6941 if (rel == relend
6942 || (rel + 1 == relend && rel->r_offset == offset + 16))
6943 {
6944 if (sec->size == offset + 24)
6945 {
6946 need_pad = NULL;
6947 break;
6948 }
6949 if (rel == relend && sec->size == offset + 16)
6950 {
6951 cnt_16b++;
6952 break;
6953 }
6954 goto broken_opd;
6955 }
6956
6957 if (rel->r_offset == offset + 24)
6958 offset += 24;
6959 else if (rel->r_offset != offset + 16)
6960 goto broken_opd;
6961 else if (rel + 1 < relend
6962 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
6963 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
6964 {
6965 offset += 16;
6966 cnt_16b++;
6967 }
6968 else if (rel + 2 < relend
6969 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_ADDR64
6970 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC)
6971 {
6972 offset += 24;
6973 rel += 1;
6974 }
6975 else
6976 goto broken_opd;
6977 }
6978
6979 add_aux_fields = non_overlapping && cnt_16b > 0;
6980
6981 if (need_edit || add_aux_fields)
6982 {
6983 Elf_Internal_Rela *write_rel;
6984 bfd_byte *rptr, *wptr;
6985 bfd_byte *new_contents;
6986 bfd_boolean skip;
6987 long opd_ent_size;
6988 bfd_size_type amt;
6989
6990 new_contents = NULL;
6991 amt = sec->size * sizeof (long) / 8;
6992 opd = &ppc64_elf_section_data (sec)->u.opd;
6993 opd->adjust = bfd_zalloc (obfd, amt);
6994 if (opd->adjust == NULL)
6995 return FALSE;
6996 ppc64_elf_section_data (sec)->sec_type = sec_opd;
6997
6998 /* This seems a waste of time as input .opd sections are all
6999 zeros as generated by gcc, but I suppose there's no reason
7000 this will always be so. We might start putting something in
7001 the third word of .opd entries. */
7002 if ((sec->flags & SEC_IN_MEMORY) == 0)
7003 {
7004 bfd_byte *loc;
7005 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
7006 {
7007 if (loc != NULL)
7008 free (loc);
7009 error_ret:
7010 if (local_syms != NULL
7011 && symtab_hdr->contents != (unsigned char *) local_syms)
7012 free (local_syms);
7013 if (elf_section_data (sec)->relocs != relstart)
7014 free (relstart);
7015 return FALSE;
7016 }
7017 sec->contents = loc;
7018 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
7019 }
7020
7021 elf_section_data (sec)->relocs = relstart;
7022
7023 new_contents = sec->contents;
7024 if (add_aux_fields)
7025 {
7026 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
7027 if (new_contents == NULL)
7028 return FALSE;
7029 need_pad = FALSE;
7030 }
7031 wptr = new_contents;
7032 rptr = sec->contents;
7033
7034 write_rel = relstart;
7035 skip = FALSE;
7036 offset = 0;
7037 opd_ent_size = 0;
7038 for (rel = relstart; rel < relend; rel++)
7039 {
7040 unsigned long r_symndx;
7041 asection *sym_sec;
7042 struct elf_link_hash_entry *h;
7043 Elf_Internal_Sym *sym;
7044
7045 r_symndx = ELF64_R_SYM (rel->r_info);
7046 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7047 r_symndx, ibfd))
7048 goto error_ret;
7049
7050 if (rel->r_offset == offset)
7051 {
7052 struct ppc_link_hash_entry *fdh = NULL;
7053
7054 /* See if the .opd entry is full 24 byte or
7055 16 byte (with fd_aux entry overlapped with next
7056 fd_func). */
7057 opd_ent_size = 24;
7058 if ((rel + 2 == relend && sec->size == offset + 16)
7059 || (rel + 3 < relend
7060 && rel[2].r_offset == offset + 16
7061 && rel[3].r_offset == offset + 24
7062 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_ADDR64
7063 && ELF64_R_TYPE (rel[3].r_info) == R_PPC64_TOC))
7064 opd_ent_size = 16;
7065
7066 if (h != NULL
7067 && h->root.root.string[0] == '.')
7068 {
7069 fdh = lookup_fdh ((struct ppc_link_hash_entry *) h,
7070 ppc_hash_table (info));
7071 if (fdh != NULL
7072 && fdh->elf.root.type != bfd_link_hash_defined
7073 && fdh->elf.root.type != bfd_link_hash_defweak)
7074 fdh = NULL;
7075 }
7076
7077 skip = (sym_sec->owner != ibfd
7078 || sym_sec->output_section == bfd_abs_section_ptr);
7079 if (skip)
7080 {
7081 if (fdh != NULL && sym_sec->owner == ibfd)
7082 {
7083 /* Arrange for the function descriptor sym
7084 to be dropped. */
7085 fdh->elf.root.u.def.value = 0;
7086 fdh->elf.root.u.def.section = sym_sec;
7087 }
7088 opd->adjust[rel->r_offset / 8] = -1;
7089 }
7090 else
7091 {
7092 /* We'll be keeping this opd entry. */
7093
7094 if (fdh != NULL)
7095 {
7096 /* Redefine the function descriptor symbol to
7097 this location in the opd section. It is
7098 necessary to update the value here rather
7099 than using an array of adjustments as we do
7100 for local symbols, because various places
7101 in the generic ELF code use the value
7102 stored in u.def.value. */
7103 fdh->elf.root.u.def.value = wptr - new_contents;
7104 fdh->adjust_done = 1;
7105 }
7106
7107 /* Local syms are a bit tricky. We could
7108 tweak them as they can be cached, but
7109 we'd need to look through the local syms
7110 for the function descriptor sym which we
7111 don't have at the moment. So keep an
7112 array of adjustments. */
7113 opd->adjust[rel->r_offset / 8]
7114 = (wptr - new_contents) - (rptr - sec->contents);
7115
7116 if (wptr != rptr)
7117 memcpy (wptr, rptr, opd_ent_size);
7118 wptr += opd_ent_size;
7119 if (add_aux_fields && opd_ent_size == 16)
7120 {
7121 memset (wptr, '\0', 8);
7122 wptr += 8;
7123 }
7124 }
7125 rptr += opd_ent_size;
7126 offset += opd_ent_size;
7127 }
7128
7129 if (skip)
7130 {
7131 if (!NO_OPD_RELOCS
7132 && !info->relocatable
7133 && !dec_dynrel_count (rel->r_info, sec, info,
7134 NULL, h, sym_sec))
7135 goto error_ret;
7136 }
7137 else
7138 {
7139 /* We need to adjust any reloc offsets to point to the
7140 new opd entries. While we're at it, we may as well
7141 remove redundant relocs. */
7142 rel->r_offset += opd->adjust[(offset - opd_ent_size) / 8];
7143 if (write_rel != rel)
7144 memcpy (write_rel, rel, sizeof (*rel));
7145 ++write_rel;
7146 }
7147 }
7148
7149 sec->size = wptr - new_contents;
7150 sec->reloc_count = write_rel - relstart;
7151 if (add_aux_fields)
7152 {
7153 free (sec->contents);
7154 sec->contents = new_contents;
7155 }
7156
7157 /* Fudge the header size too, as this is used later in
7158 elf_bfd_final_link if we are emitting relocs. */
7159 elf_section_data (sec)->rel_hdr.sh_size
7160 = sec->reloc_count * elf_section_data (sec)->rel_hdr.sh_entsize;
7161 BFD_ASSERT (elf_section_data (sec)->rel_hdr2 == NULL);
7162 some_edited = TRUE;
7163 }
7164 else if (elf_section_data (sec)->relocs != relstart)
7165 free (relstart);
7166
7167 if (local_syms != NULL
7168 && symtab_hdr->contents != (unsigned char *) local_syms)
7169 {
7170 if (!info->keep_memory)
7171 free (local_syms);
7172 else
7173 symtab_hdr->contents = (unsigned char *) local_syms;
7174 }
7175 }
7176
7177 if (some_edited)
7178 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
7179
7180 /* If we are doing a final link and the last .opd entry is just 16 byte
7181 long, add a 8 byte padding after it. */
7182 if (need_pad != NULL && !info->relocatable)
7183 {
7184 bfd_byte *p;
7185
7186 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
7187 {
7188 BFD_ASSERT (need_pad->size > 0);
7189
7190 p = bfd_malloc (need_pad->size + 8);
7191 if (p == NULL)
7192 return FALSE;
7193
7194 if (! bfd_get_section_contents (need_pad->owner, need_pad,
7195 p, 0, need_pad->size))
7196 return FALSE;
7197
7198 need_pad->contents = p;
7199 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
7200 }
7201 else
7202 {
7203 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
7204 if (p == NULL)
7205 return FALSE;
7206
7207 need_pad->contents = p;
7208 }
7209
7210 memset (need_pad->contents + need_pad->size, 0, 8);
7211 need_pad->size += 8;
7212 }
7213
7214 return TRUE;
7215 }
7216
7217 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
7218
7219 asection *
7220 ppc64_elf_tls_setup (bfd *obfd,
7221 struct bfd_link_info *info,
7222 int no_tls_get_addr_opt)
7223 {
7224 struct ppc_link_hash_table *htab;
7225
7226 htab = ppc_hash_table (info);
7227 htab->tls_get_addr = ((struct ppc_link_hash_entry *)
7228 elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
7229 FALSE, FALSE, TRUE));
7230 /* Move dynamic linking info to the function descriptor sym. */
7231 if (htab->tls_get_addr != NULL)
7232 func_desc_adjust (&htab->tls_get_addr->elf, info);
7233 htab->tls_get_addr_fd = ((struct ppc_link_hash_entry *)
7234 elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
7235 FALSE, FALSE, TRUE));
7236 if (!no_tls_get_addr_opt)
7237 {
7238 struct elf_link_hash_entry *opt, *opt_fd, *tga, *tga_fd;
7239
7240 opt = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr_opt",
7241 FALSE, FALSE, TRUE);
7242 if (opt != NULL)
7243 func_desc_adjust (opt, info);
7244 opt_fd = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
7245 FALSE, FALSE, TRUE);
7246 if (opt_fd != NULL
7247 && (opt_fd->root.type == bfd_link_hash_defined
7248 || opt_fd->root.type == bfd_link_hash_defweak))
7249 {
7250 /* If glibc supports an optimized __tls_get_addr call stub,
7251 signalled by the presence of __tls_get_addr_opt, and we'll
7252 be calling __tls_get_addr via a plt call stub, then
7253 make __tls_get_addr point to __tls_get_addr_opt. */
7254 tga_fd = &htab->tls_get_addr_fd->elf;
7255 if (htab->elf.dynamic_sections_created
7256 && tga_fd != NULL
7257 && (tga_fd->type == STT_FUNC
7258 || tga_fd->needs_plt)
7259 && !(SYMBOL_CALLS_LOCAL (info, tga_fd)
7260 || (ELF_ST_VISIBILITY (tga_fd->other) != STV_DEFAULT
7261 && tga_fd->root.type == bfd_link_hash_undefweak)))
7262 {
7263 struct plt_entry *ent;
7264
7265 for (ent = tga_fd->plt.plist; ent != NULL; ent = ent->next)
7266 if (ent->plt.refcount > 0)
7267 break;
7268 if (ent != NULL)
7269 {
7270 tga_fd->root.type = bfd_link_hash_indirect;
7271 tga_fd->root.u.i.link = &opt_fd->root;
7272 ppc64_elf_copy_indirect_symbol (info, opt_fd, tga_fd);
7273 if (opt_fd->dynindx != -1)
7274 {
7275 /* Use __tls_get_addr_opt in dynamic relocations. */
7276 opt_fd->dynindx = -1;
7277 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
7278 opt_fd->dynstr_index);
7279 if (!bfd_elf_link_record_dynamic_symbol (info, opt_fd))
7280 return FALSE;
7281 }
7282 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) opt_fd;
7283 tga = &htab->tls_get_addr->elf;
7284 if (opt != NULL && tga != NULL)
7285 {
7286 tga->root.type = bfd_link_hash_indirect;
7287 tga->root.u.i.link = &opt->root;
7288 ppc64_elf_copy_indirect_symbol (info, opt, tga);
7289 _bfd_elf_link_hash_hide_symbol (info, opt,
7290 tga->forced_local);
7291 htab->tls_get_addr = (struct ppc_link_hash_entry *) opt;
7292 }
7293 htab->tls_get_addr_fd->oh = htab->tls_get_addr;
7294 htab->tls_get_addr_fd->is_func_descriptor = 1;
7295 if (htab->tls_get_addr != NULL)
7296 {
7297 htab->tls_get_addr->oh = htab->tls_get_addr_fd;
7298 htab->tls_get_addr->is_func = 1;
7299 }
7300 }
7301 }
7302 }
7303 else
7304 no_tls_get_addr_opt = TRUE;
7305 }
7306 htab->no_tls_get_addr_opt = no_tls_get_addr_opt;
7307 return _bfd_elf_tls_setup (obfd, info);
7308 }
7309
7310 /* Return TRUE iff REL is a branch reloc with a global symbol matching
7311 HASH1 or HASH2. */
7312
7313 static bfd_boolean
7314 branch_reloc_hash_match (const bfd *ibfd,
7315 const Elf_Internal_Rela *rel,
7316 const struct ppc_link_hash_entry *hash1,
7317 const struct ppc_link_hash_entry *hash2)
7318 {
7319 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
7320 enum elf_ppc64_reloc_type r_type = ELF64_R_TYPE (rel->r_info);
7321 unsigned int r_symndx = ELF64_R_SYM (rel->r_info);
7322
7323 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
7324 {
7325 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
7326 struct elf_link_hash_entry *h;
7327
7328 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
7329 h = elf_follow_link (h);
7330 if (h == &hash1->elf || h == &hash2->elf)
7331 return TRUE;
7332 }
7333 return FALSE;
7334 }
7335
7336 /* Run through all the TLS relocs looking for optimization
7337 opportunities. The linker has been hacked (see ppc64elf.em) to do
7338 a preliminary section layout so that we know the TLS segment
7339 offsets. We can't optimize earlier because some optimizations need
7340 to know the tp offset, and we need to optimize before allocating
7341 dynamic relocations. */
7342
7343 bfd_boolean
7344 ppc64_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED, struct bfd_link_info *info)
7345 {
7346 bfd *ibfd;
7347 asection *sec;
7348 struct ppc_link_hash_table *htab;
7349 int pass;
7350
7351 if (info->relocatable || !info->executable)
7352 return TRUE;
7353
7354 htab = ppc_hash_table (info);
7355 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7356 {
7357 Elf_Internal_Sym *locsyms = NULL;
7358 asection *toc = bfd_get_section_by_name (ibfd, ".toc");
7359 unsigned char *toc_ref = NULL;
7360
7361 /* Look at all the sections for this file. Make two passes over
7362 the relocs. On the first pass, mark toc entries involved
7363 with tls relocs, and check that tls relocs involved in
7364 setting up a tls_get_addr call are indeed followed by such a
7365 call. If they are not, exclude them from the optimizations
7366 done on the second pass. */
7367 for (pass = 0; pass < 2; ++pass)
7368 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7369 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
7370 {
7371 Elf_Internal_Rela *relstart, *rel, *relend;
7372
7373 /* Read the relocations. */
7374 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7375 info->keep_memory);
7376 if (relstart == NULL)
7377 return FALSE;
7378
7379 relend = relstart + sec->reloc_count;
7380 for (rel = relstart; rel < relend; rel++)
7381 {
7382 enum elf_ppc64_reloc_type r_type;
7383 unsigned long r_symndx;
7384 struct elf_link_hash_entry *h;
7385 Elf_Internal_Sym *sym;
7386 asection *sym_sec;
7387 char *tls_mask;
7388 char tls_set, tls_clear, tls_type = 0;
7389 bfd_vma value;
7390 bfd_boolean ok_tprel, is_local;
7391 long toc_ref_index = 0;
7392 int expecting_tls_get_addr = 0;
7393
7394 r_symndx = ELF64_R_SYM (rel->r_info);
7395 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
7396 r_symndx, ibfd))
7397 {
7398 err_free_rel:
7399 if (elf_section_data (sec)->relocs != relstart)
7400 free (relstart);
7401 if (toc_ref != NULL)
7402 free (toc_ref);
7403 if (locsyms != NULL
7404 && (elf_symtab_hdr (ibfd).contents
7405 != (unsigned char *) locsyms))
7406 free (locsyms);
7407 return FALSE;
7408 }
7409
7410 if (h != NULL)
7411 {
7412 if (h->root.type != bfd_link_hash_defined
7413 && h->root.type != bfd_link_hash_defweak)
7414 continue;
7415 value = h->root.u.def.value;
7416 }
7417 else
7418 /* Symbols referenced by TLS relocs must be of type
7419 STT_TLS. So no need for .opd local sym adjust. */
7420 value = sym->st_value;
7421
7422 ok_tprel = FALSE;
7423 is_local = FALSE;
7424 if (h == NULL
7425 || !h->def_dynamic)
7426 {
7427 is_local = TRUE;
7428 value += sym_sec->output_offset;
7429 value += sym_sec->output_section->vma;
7430 value -= htab->elf.tls_sec->vma;
7431 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
7432 < (bfd_vma) 1 << 32);
7433 }
7434
7435 r_type = ELF64_R_TYPE (rel->r_info);
7436 switch (r_type)
7437 {
7438 case R_PPC64_GOT_TLSLD16:
7439 case R_PPC64_GOT_TLSLD16_LO:
7440 expecting_tls_get_addr = 1;
7441 /* Fall thru */
7442
7443 case R_PPC64_GOT_TLSLD16_HI:
7444 case R_PPC64_GOT_TLSLD16_HA:
7445 /* These relocs should never be against a symbol
7446 defined in a shared lib. Leave them alone if
7447 that turns out to be the case. */
7448 if (!is_local)
7449 continue;
7450
7451 /* LD -> LE */
7452 tls_set = 0;
7453 tls_clear = TLS_LD;
7454 tls_type = TLS_TLS | TLS_LD;
7455 break;
7456
7457 case R_PPC64_GOT_TLSGD16:
7458 case R_PPC64_GOT_TLSGD16_LO:
7459 expecting_tls_get_addr = 1;
7460 /* Fall thru */
7461
7462 case R_PPC64_GOT_TLSGD16_HI:
7463 case R_PPC64_GOT_TLSGD16_HA:
7464 if (ok_tprel)
7465 /* GD -> LE */
7466 tls_set = 0;
7467 else
7468 /* GD -> IE */
7469 tls_set = TLS_TLS | TLS_TPRELGD;
7470 tls_clear = TLS_GD;
7471 tls_type = TLS_TLS | TLS_GD;
7472 break;
7473
7474 case R_PPC64_GOT_TPREL16_DS:
7475 case R_PPC64_GOT_TPREL16_LO_DS:
7476 case R_PPC64_GOT_TPREL16_HI:
7477 case R_PPC64_GOT_TPREL16_HA:
7478 if (ok_tprel)
7479 {
7480 /* IE -> LE */
7481 tls_set = 0;
7482 tls_clear = TLS_TPREL;
7483 tls_type = TLS_TLS | TLS_TPREL;
7484 break;
7485 }
7486 continue;
7487
7488 case R_PPC64_TOC16:
7489 case R_PPC64_TOC16_LO:
7490 case R_PPC64_TLS:
7491 case R_PPC64_TLSGD:
7492 case R_PPC64_TLSLD:
7493 if (sym_sec == NULL || sym_sec != toc)
7494 continue;
7495
7496 /* Mark this toc entry as referenced by a TLS
7497 code sequence. We can do that now in the
7498 case of R_PPC64_TLS, and after checking for
7499 tls_get_addr for the TOC16 relocs. */
7500 if (toc_ref == NULL)
7501 {
7502 toc_ref = bfd_zmalloc (toc->size / 8);
7503 if (toc_ref == NULL)
7504 goto err_free_rel;
7505 }
7506 if (h != NULL)
7507 value = h->root.u.def.value;
7508 else
7509 value = sym->st_value;
7510 value += rel->r_addend;
7511 BFD_ASSERT (value < toc->size && value % 8 == 0);
7512 toc_ref_index = value / 8;
7513 if (r_type == R_PPC64_TLS
7514 || r_type == R_PPC64_TLSGD
7515 || r_type == R_PPC64_TLSLD)
7516 {
7517 toc_ref[toc_ref_index] = 1;
7518 continue;
7519 }
7520
7521 if (pass != 0 && toc_ref[toc_ref_index] == 0)
7522 continue;
7523
7524 tls_set = 0;
7525 tls_clear = 0;
7526 expecting_tls_get_addr = 2;
7527 break;
7528
7529 case R_PPC64_TPREL64:
7530 if (pass == 0
7531 || sec != toc
7532 || toc_ref == NULL
7533 || !toc_ref[rel->r_offset / 8])
7534 continue;
7535 if (ok_tprel)
7536 {
7537 /* IE -> LE */
7538 tls_set = TLS_EXPLICIT;
7539 tls_clear = TLS_TPREL;
7540 break;
7541 }
7542 continue;
7543
7544 case R_PPC64_DTPMOD64:
7545 if (pass == 0
7546 || sec != toc
7547 || toc_ref == NULL
7548 || !toc_ref[rel->r_offset / 8])
7549 continue;
7550 if (rel + 1 < relend
7551 && (rel[1].r_info
7552 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
7553 && rel[1].r_offset == rel->r_offset + 8)
7554 {
7555 if (ok_tprel)
7556 /* GD -> LE */
7557 tls_set = TLS_EXPLICIT | TLS_GD;
7558 else
7559 /* GD -> IE */
7560 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
7561 tls_clear = TLS_GD;
7562 }
7563 else
7564 {
7565 if (!is_local)
7566 continue;
7567
7568 /* LD -> LE */
7569 tls_set = TLS_EXPLICIT;
7570 tls_clear = TLS_LD;
7571 }
7572 break;
7573
7574 default:
7575 continue;
7576 }
7577
7578 if (pass == 0)
7579 {
7580 if (!expecting_tls_get_addr
7581 || !sec->has_tls_get_addr_call)
7582 continue;
7583
7584 if (rel + 1 < relend
7585 && branch_reloc_hash_match (ibfd, rel + 1,
7586 htab->tls_get_addr,
7587 htab->tls_get_addr_fd))
7588 {
7589 if (expecting_tls_get_addr == 2)
7590 {
7591 /* Check for toc tls entries. */
7592 char *toc_tls;
7593 int retval;
7594
7595 retval = get_tls_mask (&toc_tls, NULL, NULL,
7596 &locsyms,
7597 rel, ibfd);
7598 if (retval == 0)
7599 goto err_free_rel;
7600 if (retval > 1 && toc_tls != NULL)
7601 toc_ref[toc_ref_index] = 1;
7602 }
7603 continue;
7604 }
7605
7606 if (expecting_tls_get_addr != 1)
7607 continue;
7608
7609 /* Uh oh, we didn't find the expected call. We
7610 could just mark this symbol to exclude it
7611 from tls optimization but it's safer to skip
7612 the entire section. */
7613 sec->has_tls_reloc = 0;
7614 break;
7615 }
7616
7617 if (expecting_tls_get_addr && htab->tls_get_addr != NULL)
7618 {
7619 struct plt_entry *ent;
7620 for (ent = htab->tls_get_addr->elf.plt.plist;
7621 ent != NULL;
7622 ent = ent->next)
7623 if (ent->addend == 0)
7624 {
7625 if (ent->plt.refcount > 0)
7626 {
7627 ent->plt.refcount -= 1;
7628 expecting_tls_get_addr = 0;
7629 }
7630 break;
7631 }
7632 }
7633
7634 if (expecting_tls_get_addr && htab->tls_get_addr_fd != NULL)
7635 {
7636 struct plt_entry *ent;
7637 for (ent = htab->tls_get_addr_fd->elf.plt.plist;
7638 ent != NULL;
7639 ent = ent->next)
7640 if (ent->addend == 0)
7641 {
7642 if (ent->plt.refcount > 0)
7643 ent->plt.refcount -= 1;
7644 break;
7645 }
7646 }
7647
7648 if (tls_clear == 0)
7649 continue;
7650
7651 if ((tls_set & TLS_EXPLICIT) == 0)
7652 {
7653 struct got_entry *ent;
7654
7655 /* Adjust got entry for this reloc. */
7656 if (h != NULL)
7657 ent = h->got.glist;
7658 else
7659 ent = elf_local_got_ents (ibfd)[r_symndx];
7660
7661 for (; ent != NULL; ent = ent->next)
7662 if (ent->addend == rel->r_addend
7663 && ent->owner == ibfd
7664 && ent->tls_type == tls_type)
7665 break;
7666 if (ent == NULL)
7667 abort ();
7668
7669 if (tls_set == 0)
7670 {
7671 /* We managed to get rid of a got entry. */
7672 if (ent->got.refcount > 0)
7673 ent->got.refcount -= 1;
7674 }
7675 }
7676 else
7677 {
7678 /* If we got rid of a DTPMOD/DTPREL reloc pair then
7679 we'll lose one or two dyn relocs. */
7680 if (!dec_dynrel_count (rel->r_info, sec, info,
7681 NULL, h, sym_sec))
7682 return FALSE;
7683
7684 if (tls_set == (TLS_EXPLICIT | TLS_GD))
7685 {
7686 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
7687 NULL, h, sym_sec))
7688 return FALSE;
7689 }
7690 }
7691
7692 *tls_mask |= tls_set;
7693 *tls_mask &= ~tls_clear;
7694 }
7695
7696 if (elf_section_data (sec)->relocs != relstart)
7697 free (relstart);
7698 }
7699
7700 if (toc_ref != NULL)
7701 free (toc_ref);
7702
7703 if (locsyms != NULL
7704 && (elf_symtab_hdr (ibfd).contents != (unsigned char *) locsyms))
7705 {
7706 if (!info->keep_memory)
7707 free (locsyms);
7708 else
7709 elf_symtab_hdr (ibfd).contents = (unsigned char *) locsyms;
7710 }
7711 }
7712 return TRUE;
7713 }
7714
7715 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
7716 the values of any global symbols in a toc section that has been
7717 edited. Globals in toc sections should be a rarity, so this function
7718 sets a flag if any are found in toc sections other than the one just
7719 edited, so that futher hash table traversals can be avoided. */
7720
7721 struct adjust_toc_info
7722 {
7723 asection *toc;
7724 unsigned long *skip;
7725 bfd_boolean global_toc_syms;
7726 };
7727
7728 static bfd_boolean
7729 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
7730 {
7731 struct ppc_link_hash_entry *eh;
7732 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
7733
7734 if (h->root.type == bfd_link_hash_indirect)
7735 return TRUE;
7736
7737 if (h->root.type == bfd_link_hash_warning)
7738 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7739
7740 if (h->root.type != bfd_link_hash_defined
7741 && h->root.type != bfd_link_hash_defweak)
7742 return TRUE;
7743
7744 eh = (struct ppc_link_hash_entry *) h;
7745 if (eh->adjust_done)
7746 return TRUE;
7747
7748 if (eh->elf.root.u.def.section == toc_inf->toc)
7749 {
7750 unsigned long skip = toc_inf->skip[eh->elf.root.u.def.value >> 3];
7751 if (skip != (unsigned long) -1)
7752 eh->elf.root.u.def.value -= skip;
7753 else
7754 {
7755 (*_bfd_error_handler)
7756 (_("%s defined in removed toc entry"), eh->elf.root.root.string);
7757 eh->elf.root.u.def.section = &bfd_abs_section;
7758 eh->elf.root.u.def.value = 0;
7759 }
7760 eh->adjust_done = 1;
7761 }
7762 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
7763 toc_inf->global_toc_syms = TRUE;
7764
7765 return TRUE;
7766 }
7767
7768 /* Examine all relocs referencing .toc sections in order to remove
7769 unused .toc entries. */
7770
7771 bfd_boolean
7772 ppc64_elf_edit_toc (bfd *obfd ATTRIBUTE_UNUSED, struct bfd_link_info *info)
7773 {
7774 bfd *ibfd;
7775 struct adjust_toc_info toc_inf;
7776
7777 toc_inf.global_toc_syms = TRUE;
7778 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7779 {
7780 asection *toc, *sec;
7781 Elf_Internal_Shdr *symtab_hdr;
7782 Elf_Internal_Sym *local_syms;
7783 struct elf_link_hash_entry **sym_hashes;
7784 Elf_Internal_Rela *relstart, *rel;
7785 unsigned long *skip, *drop;
7786 unsigned char *used;
7787 unsigned char *keep, last, some_unused;
7788
7789 toc = bfd_get_section_by_name (ibfd, ".toc");
7790 if (toc == NULL
7791 || toc->size == 0
7792 || toc->sec_info_type == ELF_INFO_TYPE_JUST_SYMS
7793 || elf_discarded_section (toc))
7794 continue;
7795
7796 local_syms = NULL;
7797 symtab_hdr = &elf_symtab_hdr (ibfd);
7798 sym_hashes = elf_sym_hashes (ibfd);
7799
7800 /* Look at sections dropped from the final link. */
7801 skip = NULL;
7802 relstart = NULL;
7803 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7804 {
7805 if (sec->reloc_count == 0
7806 || !elf_discarded_section (sec)
7807 || get_opd_info (sec)
7808 || (sec->flags & SEC_ALLOC) == 0
7809 || (sec->flags & SEC_DEBUGGING) != 0)
7810 continue;
7811
7812 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
7813 if (relstart == NULL)
7814 goto error_ret;
7815
7816 /* Run through the relocs to see which toc entries might be
7817 unused. */
7818 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
7819 {
7820 enum elf_ppc64_reloc_type r_type;
7821 unsigned long r_symndx;
7822 asection *sym_sec;
7823 struct elf_link_hash_entry *h;
7824 Elf_Internal_Sym *sym;
7825 bfd_vma val;
7826
7827 r_type = ELF64_R_TYPE (rel->r_info);
7828 switch (r_type)
7829 {
7830 default:
7831 continue;
7832
7833 case R_PPC64_TOC16:
7834 case R_PPC64_TOC16_LO:
7835 case R_PPC64_TOC16_HI:
7836 case R_PPC64_TOC16_HA:
7837 case R_PPC64_TOC16_DS:
7838 case R_PPC64_TOC16_LO_DS:
7839 break;
7840 }
7841
7842 r_symndx = ELF64_R_SYM (rel->r_info);
7843 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7844 r_symndx, ibfd))
7845 goto error_ret;
7846
7847 if (sym_sec != toc)
7848 continue;
7849
7850 if (h != NULL)
7851 val = h->root.u.def.value;
7852 else
7853 val = sym->st_value;
7854 val += rel->r_addend;
7855
7856 if (val >= toc->size)
7857 continue;
7858
7859 /* Anything in the toc ought to be aligned to 8 bytes.
7860 If not, don't mark as unused. */
7861 if (val & 7)
7862 continue;
7863
7864 if (skip == NULL)
7865 {
7866 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 7) / 8);
7867 if (skip == NULL)
7868 goto error_ret;
7869 }
7870
7871 skip[val >> 3] = 1;
7872 }
7873
7874 if (elf_section_data (sec)->relocs != relstart)
7875 free (relstart);
7876 }
7877
7878 if (skip == NULL)
7879 continue;
7880
7881 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
7882 if (used == NULL)
7883 {
7884 error_ret:
7885 if (local_syms != NULL
7886 && symtab_hdr->contents != (unsigned char *) local_syms)
7887 free (local_syms);
7888 if (sec != NULL
7889 && relstart != NULL
7890 && elf_section_data (sec)->relocs != relstart)
7891 free (relstart);
7892 if (skip != NULL)
7893 free (skip);
7894 return FALSE;
7895 }
7896
7897 /* Now check all kept sections that might reference the toc.
7898 Check the toc itself last. */
7899 for (sec = (ibfd->sections == toc && toc->next ? toc->next
7900 : ibfd->sections);
7901 sec != NULL;
7902 sec = (sec == toc ? NULL
7903 : sec->next == NULL ? toc
7904 : sec->next == toc && toc->next ? toc->next
7905 : sec->next))
7906 {
7907 int repeat;
7908
7909 if (sec->reloc_count == 0
7910 || elf_discarded_section (sec)
7911 || get_opd_info (sec)
7912 || (sec->flags & SEC_ALLOC) == 0
7913 || (sec->flags & SEC_DEBUGGING) != 0)
7914 continue;
7915
7916 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, TRUE);
7917 if (relstart == NULL)
7918 goto error_ret;
7919
7920 /* Mark toc entries referenced as used. */
7921 repeat = 0;
7922 do
7923 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
7924 {
7925 enum elf_ppc64_reloc_type r_type;
7926 unsigned long r_symndx;
7927 asection *sym_sec;
7928 struct elf_link_hash_entry *h;
7929 Elf_Internal_Sym *sym;
7930 bfd_vma val;
7931
7932 r_type = ELF64_R_TYPE (rel->r_info);
7933 switch (r_type)
7934 {
7935 case R_PPC64_TOC16:
7936 case R_PPC64_TOC16_LO:
7937 case R_PPC64_TOC16_HI:
7938 case R_PPC64_TOC16_HA:
7939 case R_PPC64_TOC16_DS:
7940 case R_PPC64_TOC16_LO_DS:
7941 /* In case we're taking addresses of toc entries. */
7942 case R_PPC64_ADDR64:
7943 break;
7944
7945 default:
7946 continue;
7947 }
7948
7949 r_symndx = ELF64_R_SYM (rel->r_info);
7950 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7951 r_symndx, ibfd))
7952 {
7953 free (used);
7954 goto error_ret;
7955 }
7956
7957 if (sym_sec != toc)
7958 continue;
7959
7960 if (h != NULL)
7961 val = h->root.u.def.value;
7962 else
7963 val = sym->st_value;
7964 val += rel->r_addend;
7965
7966 if (val >= toc->size)
7967 continue;
7968
7969 /* For the toc section, we only mark as used if
7970 this entry itself isn't unused. */
7971 if (sec == toc
7972 && !used[val >> 3]
7973 && (used[rel->r_offset >> 3]
7974 || !skip[rel->r_offset >> 3]))
7975 /* Do all the relocs again, to catch reference
7976 chains. */
7977 repeat = 1;
7978
7979 used[val >> 3] = 1;
7980 }
7981 while (repeat);
7982 }
7983
7984 /* Merge the used and skip arrays. Assume that TOC
7985 doublewords not appearing as either used or unused belong
7986 to to an entry more than one doubleword in size. */
7987 for (drop = skip, keep = used, last = 0, some_unused = 0;
7988 drop < skip + (toc->size + 7) / 8;
7989 ++drop, ++keep)
7990 {
7991 if (*keep)
7992 {
7993 *drop = 0;
7994 last = 0;
7995 }
7996 else if (*drop)
7997 {
7998 some_unused = 1;
7999 last = 1;
8000 }
8001 else
8002 *drop = last;
8003 }
8004
8005 free (used);
8006
8007 if (some_unused)
8008 {
8009 bfd_byte *contents, *src;
8010 unsigned long off;
8011
8012 /* Shuffle the toc contents, and at the same time convert the
8013 skip array from booleans into offsets. */
8014 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
8015 goto error_ret;
8016
8017 elf_section_data (toc)->this_hdr.contents = contents;
8018
8019 for (src = contents, off = 0, drop = skip;
8020 src < contents + toc->size;
8021 src += 8, ++drop)
8022 {
8023 if (*drop)
8024 {
8025 *drop = (unsigned long) -1;
8026 off += 8;
8027 }
8028 else if (off != 0)
8029 {
8030 *drop = off;
8031 memcpy (src - off, src, 8);
8032 }
8033 }
8034 toc->rawsize = toc->size;
8035 toc->size = src - contents - off;
8036
8037 if (toc->reloc_count != 0)
8038 {
8039 Elf_Internal_Rela *wrel;
8040 bfd_size_type sz;
8041
8042 /* Read toc relocs. */
8043 relstart = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
8044 TRUE);
8045 if (relstart == NULL)
8046 goto error_ret;
8047
8048 /* Remove unused toc relocs, and adjust those we keep. */
8049 wrel = relstart;
8050 for (rel = relstart; rel < relstart + toc->reloc_count; ++rel)
8051 if (skip[rel->r_offset >> 3] != (unsigned long) -1)
8052 {
8053 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
8054 wrel->r_info = rel->r_info;
8055 wrel->r_addend = rel->r_addend;
8056 ++wrel;
8057 }
8058 else if (!dec_dynrel_count (rel->r_info, toc, info,
8059 &local_syms, NULL, NULL))
8060 goto error_ret;
8061
8062 toc->reloc_count = wrel - relstart;
8063 sz = elf_section_data (toc)->rel_hdr.sh_entsize;
8064 elf_section_data (toc)->rel_hdr.sh_size = toc->reloc_count * sz;
8065 BFD_ASSERT (elf_section_data (toc)->rel_hdr2 == NULL);
8066 }
8067
8068 /* Adjust addends for relocs against the toc section sym. */
8069 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8070 {
8071 if (sec->reloc_count == 0
8072 || elf_discarded_section (sec))
8073 continue;
8074
8075 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8076 TRUE);
8077 if (relstart == NULL)
8078 goto error_ret;
8079
8080 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8081 {
8082 enum elf_ppc64_reloc_type r_type;
8083 unsigned long r_symndx;
8084 asection *sym_sec;
8085 struct elf_link_hash_entry *h;
8086 Elf_Internal_Sym *sym;
8087
8088 r_type = ELF64_R_TYPE (rel->r_info);
8089 switch (r_type)
8090 {
8091 default:
8092 continue;
8093
8094 case R_PPC64_TOC16:
8095 case R_PPC64_TOC16_LO:
8096 case R_PPC64_TOC16_HI:
8097 case R_PPC64_TOC16_HA:
8098 case R_PPC64_TOC16_DS:
8099 case R_PPC64_TOC16_LO_DS:
8100 case R_PPC64_ADDR64:
8101 break;
8102 }
8103
8104 r_symndx = ELF64_R_SYM (rel->r_info);
8105 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8106 r_symndx, ibfd))
8107 goto error_ret;
8108
8109 if (sym_sec != toc || h != NULL || sym->st_value != 0)
8110 continue;
8111
8112 rel->r_addend -= skip[rel->r_addend >> 3];
8113 }
8114 }
8115
8116 /* We shouldn't have local or global symbols defined in the TOC,
8117 but handle them anyway. */
8118 if (local_syms != NULL)
8119 {
8120 Elf_Internal_Sym *sym;
8121
8122 for (sym = local_syms;
8123 sym < local_syms + symtab_hdr->sh_info;
8124 ++sym)
8125 if (sym->st_value != 0
8126 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
8127 {
8128 if (skip[sym->st_value >> 3] != (unsigned long) -1)
8129 sym->st_value -= skip[sym->st_value >> 3];
8130 else
8131 {
8132 (*_bfd_error_handler)
8133 (_("%s defined in removed toc entry"),
8134 bfd_elf_sym_name (ibfd, symtab_hdr, sym,
8135 NULL));
8136 sym->st_value = 0;
8137 sym->st_shndx = SHN_ABS;
8138 }
8139 symtab_hdr->contents = (unsigned char *) local_syms;
8140 }
8141 }
8142
8143 /* Finally, adjust any global syms defined in the toc. */
8144 if (toc_inf.global_toc_syms)
8145 {
8146 toc_inf.toc = toc;
8147 toc_inf.skip = skip;
8148 toc_inf.global_toc_syms = FALSE;
8149 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
8150 &toc_inf);
8151 }
8152 }
8153
8154 if (local_syms != NULL
8155 && symtab_hdr->contents != (unsigned char *) local_syms)
8156 {
8157 if (!info->keep_memory)
8158 free (local_syms);
8159 else
8160 symtab_hdr->contents = (unsigned char *) local_syms;
8161 }
8162 free (skip);
8163 }
8164
8165 return TRUE;
8166 }
8167
8168 /* Allocate space in .plt, .got and associated reloc sections for
8169 dynamic relocs. */
8170
8171 static bfd_boolean
8172 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
8173 {
8174 struct bfd_link_info *info;
8175 struct ppc_link_hash_table *htab;
8176 asection *s;
8177 struct ppc_link_hash_entry *eh;
8178 struct ppc_dyn_relocs *p;
8179 struct got_entry *gent;
8180
8181 if (h->root.type == bfd_link_hash_indirect)
8182 return TRUE;
8183
8184 if (h->root.type == bfd_link_hash_warning)
8185 h = (struct elf_link_hash_entry *) h->root.u.i.link;
8186
8187 info = (struct bfd_link_info *) inf;
8188 htab = ppc_hash_table (info);
8189
8190 if ((htab->elf.dynamic_sections_created
8191 && h->dynindx != -1
8192 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h))
8193 || h->type == STT_GNU_IFUNC)
8194 {
8195 struct plt_entry *pent;
8196 bfd_boolean doneone = FALSE;
8197 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
8198 if (pent->plt.refcount > 0)
8199 {
8200 if (!htab->elf.dynamic_sections_created
8201 || h->dynindx == -1)
8202 {
8203 s = htab->iplt;
8204 pent->plt.offset = s->size;
8205 s->size += PLT_ENTRY_SIZE;
8206 s = htab->reliplt;
8207 }
8208 else
8209 {
8210 /* If this is the first .plt entry, make room for the special
8211 first entry. */
8212 s = htab->plt;
8213 if (s->size == 0)
8214 s->size += PLT_INITIAL_ENTRY_SIZE;
8215
8216 pent->plt.offset = s->size;
8217
8218 /* Make room for this entry. */
8219 s->size += PLT_ENTRY_SIZE;
8220
8221 /* Make room for the .glink code. */
8222 s = htab->glink;
8223 if (s->size == 0)
8224 s->size += GLINK_CALL_STUB_SIZE;
8225 /* We need bigger stubs past index 32767. */
8226 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
8227 s->size += 4;
8228 s->size += 2*4;
8229
8230 /* We also need to make an entry in the .rela.plt section. */
8231 s = htab->relplt;
8232 }
8233 s->size += sizeof (Elf64_External_Rela);
8234 doneone = TRUE;
8235 }
8236 else
8237 pent->plt.offset = (bfd_vma) -1;
8238 if (!doneone)
8239 {
8240 h->plt.plist = NULL;
8241 h->needs_plt = 0;
8242 }
8243 }
8244 else
8245 {
8246 h->plt.plist = NULL;
8247 h->needs_plt = 0;
8248 }
8249
8250 eh = (struct ppc_link_hash_entry *) h;
8251 /* Run through the TLS GD got entries first if we're changing them
8252 to TPREL. */
8253 if ((eh->tls_mask & TLS_TPRELGD) != 0)
8254 for (gent = h->got.glist; gent != NULL; gent = gent->next)
8255 if (gent->got.refcount > 0
8256 && (gent->tls_type & TLS_GD) != 0)
8257 {
8258 /* This was a GD entry that has been converted to TPREL. If
8259 there happens to be a TPREL entry we can use that one. */
8260 struct got_entry *ent;
8261 for (ent = h->got.glist; ent != NULL; ent = ent->next)
8262 if (ent->got.refcount > 0
8263 && (ent->tls_type & TLS_TPREL) != 0
8264 && ent->addend == gent->addend
8265 && ent->owner == gent->owner)
8266 {
8267 gent->got.refcount = 0;
8268 break;
8269 }
8270
8271 /* If not, then we'll be using our own TPREL entry. */
8272 if (gent->got.refcount != 0)
8273 gent->tls_type = TLS_TLS | TLS_TPREL;
8274 }
8275
8276 for (gent = h->got.glist; gent != NULL; gent = gent->next)
8277 if (gent->got.refcount > 0)
8278 {
8279 bfd_boolean dyn;
8280 asection *rsec;
8281
8282 /* Make sure this symbol is output as a dynamic symbol.
8283 Undefined weak syms won't yet be marked as dynamic,
8284 nor will all TLS symbols. */
8285 if (h->dynindx == -1
8286 && !h->forced_local
8287 && h->type != STT_GNU_IFUNC
8288 && htab->elf.dynamic_sections_created)
8289 {
8290 if (! bfd_elf_link_record_dynamic_symbol (info, h))
8291 return FALSE;
8292 }
8293
8294 if ((gent->tls_type & TLS_LD) != 0
8295 && !h->def_dynamic)
8296 {
8297 ppc64_tlsld_got (gent->owner)->refcount += 1;
8298 gent->got.offset = (bfd_vma) -1;
8299 continue;
8300 }
8301
8302 if (!is_ppc64_elf (gent->owner))
8303 continue;
8304
8305 s = ppc64_elf_tdata (gent->owner)->got;
8306 gent->got.offset = s->size;
8307 s->size
8308 += (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)) ? 16 : 8;
8309 dyn = htab->elf.dynamic_sections_created;
8310 rsec = NULL;
8311 if ((info->shared
8312 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
8313 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
8314 || h->root.type != bfd_link_hash_undefweak))
8315 rsec = ppc64_elf_tdata (gent->owner)->relgot;
8316 else if (h->type == STT_GNU_IFUNC)
8317 rsec = htab->reliplt;
8318 if (rsec != NULL)
8319 rsec->size += (gent->tls_type & eh->tls_mask & TLS_GD
8320 ? 2 * sizeof (Elf64_External_Rela)
8321 : sizeof (Elf64_External_Rela));
8322 }
8323 else
8324 gent->got.offset = (bfd_vma) -1;
8325
8326 if (eh->dyn_relocs == NULL
8327 || (!htab->elf.dynamic_sections_created
8328 && h->type != STT_GNU_IFUNC))
8329 return TRUE;
8330
8331 /* In the shared -Bsymbolic case, discard space allocated for
8332 dynamic pc-relative relocs against symbols which turn out to be
8333 defined in regular objects. For the normal shared case, discard
8334 space for relocs that have become local due to symbol visibility
8335 changes. */
8336
8337 if (info->shared)
8338 {
8339 /* Relocs that use pc_count are those that appear on a call insn,
8340 or certain REL relocs (see must_be_dyn_reloc) that can be
8341 generated via assembly. We want calls to protected symbols to
8342 resolve directly to the function rather than going via the plt.
8343 If people want function pointer comparisons to work as expected
8344 then they should avoid writing weird assembly. */
8345 if (SYMBOL_CALLS_LOCAL (info, h))
8346 {
8347 struct ppc_dyn_relocs **pp;
8348
8349 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
8350 {
8351 p->count -= p->pc_count;
8352 p->pc_count = 0;
8353 if (p->count == 0)
8354 *pp = p->next;
8355 else
8356 pp = &p->next;
8357 }
8358 }
8359
8360 /* Also discard relocs on undefined weak syms with non-default
8361 visibility. */
8362 if (eh->dyn_relocs != NULL
8363 && h->root.type == bfd_link_hash_undefweak)
8364 {
8365 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
8366 eh->dyn_relocs = NULL;
8367
8368 /* Make sure this symbol is output as a dynamic symbol.
8369 Undefined weak syms won't yet be marked as dynamic. */
8370 else if (h->dynindx == -1
8371 && !h->forced_local)
8372 {
8373 if (! bfd_elf_link_record_dynamic_symbol (info, h))
8374 return FALSE;
8375 }
8376 }
8377 }
8378 else if (h->type == STT_GNU_IFUNC)
8379 {
8380 if (!h->non_got_ref)
8381 eh->dyn_relocs = NULL;
8382 }
8383 else if (ELIMINATE_COPY_RELOCS)
8384 {
8385 /* For the non-shared case, discard space for relocs against
8386 symbols which turn out to need copy relocs or are not
8387 dynamic. */
8388
8389 if (!h->non_got_ref
8390 && !h->def_regular)
8391 {
8392 /* Make sure this symbol is output as a dynamic symbol.
8393 Undefined weak syms won't yet be marked as dynamic. */
8394 if (h->dynindx == -1
8395 && !h->forced_local)
8396 {
8397 if (! bfd_elf_link_record_dynamic_symbol (info, h))
8398 return FALSE;
8399 }
8400
8401 /* If that succeeded, we know we'll be keeping all the
8402 relocs. */
8403 if (h->dynindx != -1)
8404 goto keep;
8405 }
8406
8407 eh->dyn_relocs = NULL;
8408
8409 keep: ;
8410 }
8411
8412 /* Finally, allocate space. */
8413 for (p = eh->dyn_relocs; p != NULL; p = p->next)
8414 {
8415 asection *sreloc = elf_section_data (p->sec)->sreloc;
8416 if (!htab->elf.dynamic_sections_created)
8417 sreloc = htab->reliplt;
8418 sreloc->size += p->count * sizeof (Elf64_External_Rela);
8419 }
8420
8421 return TRUE;
8422 }
8423
8424 /* Find any dynamic relocs that apply to read-only sections. */
8425
8426 static bfd_boolean
8427 readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
8428 {
8429 struct ppc_link_hash_entry *eh;
8430 struct ppc_dyn_relocs *p;
8431
8432 if (h->root.type == bfd_link_hash_warning)
8433 h = (struct elf_link_hash_entry *) h->root.u.i.link;
8434
8435 eh = (struct ppc_link_hash_entry *) h;
8436 for (p = eh->dyn_relocs; p != NULL; p = p->next)
8437 {
8438 asection *s = p->sec->output_section;
8439
8440 if (s != NULL && (s->flags & SEC_READONLY) != 0)
8441 {
8442 struct bfd_link_info *info = inf;
8443
8444 info->flags |= DF_TEXTREL;
8445
8446 /* Not an error, just cut short the traversal. */
8447 return FALSE;
8448 }
8449 }
8450 return TRUE;
8451 }
8452
8453 /* Set the sizes of the dynamic sections. */
8454
8455 static bfd_boolean
8456 ppc64_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
8457 struct bfd_link_info *info)
8458 {
8459 struct ppc_link_hash_table *htab;
8460 bfd *dynobj;
8461 asection *s;
8462 bfd_boolean relocs;
8463 bfd *ibfd;
8464
8465 htab = ppc_hash_table (info);
8466 dynobj = htab->elf.dynobj;
8467 if (dynobj == NULL)
8468 abort ();
8469
8470 if (htab->elf.dynamic_sections_created)
8471 {
8472 /* Set the contents of the .interp section to the interpreter. */
8473 if (info->executable)
8474 {
8475 s = bfd_get_section_by_name (dynobj, ".interp");
8476 if (s == NULL)
8477 abort ();
8478 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
8479 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
8480 }
8481 }
8482
8483 /* Set up .got offsets for local syms, and space for local dynamic
8484 relocs. */
8485 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8486 {
8487 struct got_entry **lgot_ents;
8488 struct got_entry **end_lgot_ents;
8489 struct plt_entry **local_plt;
8490 struct plt_entry **end_local_plt;
8491 char *lgot_masks;
8492 bfd_size_type locsymcount;
8493 Elf_Internal_Shdr *symtab_hdr;
8494 asection *srel;
8495
8496 if (!is_ppc64_elf (ibfd))
8497 continue;
8498
8499 for (s = ibfd->sections; s != NULL; s = s->next)
8500 {
8501 struct ppc_dyn_relocs *p;
8502
8503 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
8504 {
8505 if (!bfd_is_abs_section (p->sec)
8506 && bfd_is_abs_section (p->sec->output_section))
8507 {
8508 /* Input section has been discarded, either because
8509 it is a copy of a linkonce section or due to
8510 linker script /DISCARD/, so we'll be discarding
8511 the relocs too. */
8512 }
8513 else if (p->count != 0)
8514 {
8515 srel = elf_section_data (p->sec)->sreloc;
8516 if (!htab->elf.dynamic_sections_created)
8517 srel = htab->reliplt;
8518 srel->size += p->count * sizeof (Elf64_External_Rela);
8519 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
8520 info->flags |= DF_TEXTREL;
8521 }
8522 }
8523 }
8524
8525 lgot_ents = elf_local_got_ents (ibfd);
8526 if (!lgot_ents)
8527 continue;
8528
8529 symtab_hdr = &elf_symtab_hdr (ibfd);
8530 locsymcount = symtab_hdr->sh_info;
8531 end_lgot_ents = lgot_ents + locsymcount;
8532 local_plt = (struct plt_entry **) end_lgot_ents;
8533 end_local_plt = local_plt + locsymcount;
8534 lgot_masks = (char *) end_local_plt;
8535 s = ppc64_elf_tdata (ibfd)->got;
8536 srel = ppc64_elf_tdata (ibfd)->relgot;
8537 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
8538 {
8539 struct got_entry *ent;
8540
8541 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
8542 if (ent->got.refcount > 0)
8543 {
8544 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
8545 {
8546 ppc64_tlsld_got (ibfd)->refcount += 1;
8547 ent->got.offset = (bfd_vma) -1;
8548 }
8549 else
8550 {
8551 unsigned int num = 1;
8552 ent->got.offset = s->size;
8553 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
8554 num = 2;
8555 s->size += num * 8;
8556 if (info->shared)
8557 srel->size += num * sizeof (Elf64_External_Rela);
8558 else if ((*lgot_masks & PLT_IFUNC) != 0)
8559 htab->reliplt->size += num * sizeof (Elf64_External_Rela);
8560 }
8561 }
8562 else
8563 ent->got.offset = (bfd_vma) -1;
8564 }
8565
8566 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
8567 for (; local_plt < end_local_plt; ++local_plt)
8568 {
8569 struct plt_entry *ent;
8570
8571 for (ent = *local_plt; ent != NULL; ent = ent->next)
8572 if (ent->plt.refcount > 0)
8573 {
8574 s = htab->iplt;
8575 ent->plt.offset = s->size;
8576 s->size += PLT_ENTRY_SIZE;
8577
8578 htab->reliplt->size += sizeof (Elf64_External_Rela);
8579 }
8580 else
8581 ent->plt.offset = (bfd_vma) -1;
8582 }
8583 }
8584
8585 /* Allocate global sym .plt and .got entries, and space for global
8586 sym dynamic relocs. */
8587 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
8588
8589 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8590 {
8591 if (!is_ppc64_elf (ibfd))
8592 continue;
8593
8594 if (ppc64_tlsld_got (ibfd)->refcount > 0)
8595 {
8596 s = ppc64_elf_tdata (ibfd)->got;
8597 ppc64_tlsld_got (ibfd)->offset = s->size;
8598 s->size += 16;
8599 if (info->shared)
8600 {
8601 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
8602 srel->size += sizeof (Elf64_External_Rela);
8603 }
8604 }
8605 else
8606 ppc64_tlsld_got (ibfd)->offset = (bfd_vma) -1;
8607 }
8608
8609 /* We now have determined the sizes of the various dynamic sections.
8610 Allocate memory for them. */
8611 relocs = FALSE;
8612 for (s = dynobj->sections; s != NULL; s = s->next)
8613 {
8614 if ((s->flags & SEC_LINKER_CREATED) == 0)
8615 continue;
8616
8617 if (s == htab->brlt || s == htab->relbrlt)
8618 /* These haven't been allocated yet; don't strip. */
8619 continue;
8620 else if (s == htab->got
8621 || s == htab->plt
8622 || s == htab->iplt
8623 || s == htab->glink
8624 || s == htab->dynbss)
8625 {
8626 /* Strip this section if we don't need it; see the
8627 comment below. */
8628 }
8629 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
8630 {
8631 if (s->size != 0)
8632 {
8633 if (s != htab->relplt)
8634 relocs = TRUE;
8635
8636 /* We use the reloc_count field as a counter if we need
8637 to copy relocs into the output file. */
8638 s->reloc_count = 0;
8639 }
8640 }
8641 else
8642 {
8643 /* It's not one of our sections, so don't allocate space. */
8644 continue;
8645 }
8646
8647 if (s->size == 0)
8648 {
8649 /* If we don't need this section, strip it from the
8650 output file. This is mostly to handle .rela.bss and
8651 .rela.plt. We must create both sections in
8652 create_dynamic_sections, because they must be created
8653 before the linker maps input sections to output
8654 sections. The linker does that before
8655 adjust_dynamic_symbol is called, and it is that
8656 function which decides whether anything needs to go
8657 into these sections. */
8658 s->flags |= SEC_EXCLUDE;
8659 continue;
8660 }
8661
8662 if ((s->flags & SEC_HAS_CONTENTS) == 0)
8663 continue;
8664
8665 /* Allocate memory for the section contents. We use bfd_zalloc
8666 here in case unused entries are not reclaimed before the
8667 section's contents are written out. This should not happen,
8668 but this way if it does we get a R_PPC64_NONE reloc in .rela
8669 sections instead of garbage.
8670 We also rely on the section contents being zero when writing
8671 the GOT. */
8672 s->contents = bfd_zalloc (dynobj, s->size);
8673 if (s->contents == NULL)
8674 return FALSE;
8675 }
8676
8677 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8678 {
8679 if (!is_ppc64_elf (ibfd))
8680 continue;
8681
8682 s = ppc64_elf_tdata (ibfd)->got;
8683 if (s != NULL && s != htab->got)
8684 {
8685 if (s->size == 0)
8686 s->flags |= SEC_EXCLUDE;
8687 else
8688 {
8689 s->contents = bfd_zalloc (ibfd, s->size);
8690 if (s->contents == NULL)
8691 return FALSE;
8692 }
8693 }
8694 s = ppc64_elf_tdata (ibfd)->relgot;
8695 if (s != NULL)
8696 {
8697 if (s->size == 0)
8698 s->flags |= SEC_EXCLUDE;
8699 else
8700 {
8701 s->contents = bfd_zalloc (ibfd, s->size);
8702 if (s->contents == NULL)
8703 return FALSE;
8704 relocs = TRUE;
8705 s->reloc_count = 0;
8706 }
8707 }
8708 }
8709
8710 if (htab->elf.dynamic_sections_created)
8711 {
8712 /* Add some entries to the .dynamic section. We fill in the
8713 values later, in ppc64_elf_finish_dynamic_sections, but we
8714 must add the entries now so that we get the correct size for
8715 the .dynamic section. The DT_DEBUG entry is filled in by the
8716 dynamic linker and used by the debugger. */
8717 #define add_dynamic_entry(TAG, VAL) \
8718 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
8719
8720 if (info->executable)
8721 {
8722 if (!add_dynamic_entry (DT_DEBUG, 0))
8723 return FALSE;
8724 }
8725
8726 if (htab->plt != NULL && htab->plt->size != 0)
8727 {
8728 if (!add_dynamic_entry (DT_PLTGOT, 0)
8729 || !add_dynamic_entry (DT_PLTRELSZ, 0)
8730 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
8731 || !add_dynamic_entry (DT_JMPREL, 0)
8732 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
8733 return FALSE;
8734 }
8735
8736 if (NO_OPD_RELOCS)
8737 {
8738 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
8739 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
8740 return FALSE;
8741 }
8742
8743 if (!htab->no_tls_get_addr_opt
8744 && htab->tls_get_addr_fd != NULL
8745 && htab->tls_get_addr_fd->elf.plt.plist != NULL
8746 && !add_dynamic_entry (DT_PPC64_TLSOPT, 0))
8747 return FALSE;
8748
8749 if (relocs)
8750 {
8751 if (!add_dynamic_entry (DT_RELA, 0)
8752 || !add_dynamic_entry (DT_RELASZ, 0)
8753 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
8754 return FALSE;
8755
8756 /* If any dynamic relocs apply to a read-only section,
8757 then we need a DT_TEXTREL entry. */
8758 if ((info->flags & DF_TEXTREL) == 0)
8759 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info);
8760
8761 if ((info->flags & DF_TEXTREL) != 0)
8762 {
8763 if (!add_dynamic_entry (DT_TEXTREL, 0))
8764 return FALSE;
8765 }
8766 }
8767 }
8768 #undef add_dynamic_entry
8769
8770 return TRUE;
8771 }
8772
8773 /* Determine the type of stub needed, if any, for a call. */
8774
8775 static inline enum ppc_stub_type
8776 ppc_type_of_stub (asection *input_sec,
8777 const Elf_Internal_Rela *rel,
8778 struct ppc_link_hash_entry **hash,
8779 struct plt_entry **plt_ent,
8780 bfd_vma destination)
8781 {
8782 struct ppc_link_hash_entry *h = *hash;
8783 bfd_vma location;
8784 bfd_vma branch_offset;
8785 bfd_vma max_branch_offset;
8786 enum elf_ppc64_reloc_type r_type;
8787
8788 if (h != NULL)
8789 {
8790 struct plt_entry *ent;
8791 struct ppc_link_hash_entry *fdh = h;
8792 if (h->oh != NULL
8793 && h->oh->is_func_descriptor)
8794 fdh = ppc_follow_link (h->oh);
8795
8796 for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next)
8797 if (ent->addend == rel->r_addend
8798 && ent->plt.offset != (bfd_vma) -1)
8799 {
8800 *hash = fdh;
8801 *plt_ent = ent;
8802 return ppc_stub_plt_call;
8803 }
8804
8805 /* Here, we know we don't have a plt entry. If we don't have a
8806 either a defined function descriptor or a defined entry symbol
8807 in a regular object file, then it is pointless trying to make
8808 any other type of stub. */
8809 if (!((fdh->elf.root.type == bfd_link_hash_defined
8810 || fdh->elf.root.type == bfd_link_hash_defweak)
8811 && fdh->elf.root.u.def.section->output_section != NULL)
8812 && !((h->elf.root.type == bfd_link_hash_defined
8813 || h->elf.root.type == bfd_link_hash_defweak)
8814 && h->elf.root.u.def.section->output_section != NULL))
8815 return ppc_stub_none;
8816 }
8817 else if (elf_local_got_ents (input_sec->owner) != NULL)
8818 {
8819 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (input_sec->owner);
8820 struct plt_entry **local_plt = (struct plt_entry **)
8821 elf_local_got_ents (input_sec->owner) + symtab_hdr->sh_info;
8822 unsigned long r_symndx = ELF64_R_SYM (rel->r_info);
8823
8824 if (local_plt[r_symndx] != NULL)
8825 {
8826 struct plt_entry *ent;
8827
8828 for (ent = local_plt[r_symndx]; ent != NULL; ent = ent->next)
8829 if (ent->addend == rel->r_addend
8830 && ent->plt.offset != (bfd_vma) -1)
8831 {
8832 *plt_ent = ent;
8833 return ppc_stub_plt_call;
8834 }
8835 }
8836 }
8837
8838 /* Determine where the call point is. */
8839 location = (input_sec->output_offset
8840 + input_sec->output_section->vma
8841 + rel->r_offset);
8842
8843 branch_offset = destination - location;
8844 r_type = ELF64_R_TYPE (rel->r_info);
8845
8846 /* Determine if a long branch stub is needed. */
8847 max_branch_offset = 1 << 25;
8848 if (r_type != R_PPC64_REL24)
8849 max_branch_offset = 1 << 15;
8850
8851 if (branch_offset + max_branch_offset >= 2 * max_branch_offset)
8852 /* We need a stub. Figure out whether a long_branch or plt_branch
8853 is needed later. */
8854 return ppc_stub_long_branch;
8855
8856 return ppc_stub_none;
8857 }
8858
8859 /* Build a .plt call stub. */
8860
8861 static inline bfd_byte *
8862 build_plt_stub (bfd *obfd, bfd_byte *p, int offset, Elf_Internal_Rela *r)
8863 {
8864 #define PPC_LO(v) ((v) & 0xffff)
8865 #define PPC_HI(v) (((v) >> 16) & 0xffff)
8866 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
8867
8868 if (PPC_HA (offset) != 0)
8869 {
8870 if (r != NULL)
8871 {
8872 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
8873 r[1].r_offset = r[0].r_offset + 8;
8874 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
8875 r[1].r_addend = r[0].r_addend;
8876 if (PPC_HA (offset + 16) != PPC_HA (offset))
8877 {
8878 r[2].r_offset = r[1].r_offset + 4;
8879 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO);
8880 r[2].r_addend = r[0].r_addend;
8881 }
8882 else
8883 {
8884 r[2].r_offset = r[1].r_offset + 8;
8885 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
8886 r[2].r_addend = r[0].r_addend + 8;
8887 r[3].r_offset = r[2].r_offset + 4;
8888 r[3].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
8889 r[3].r_addend = r[0].r_addend + 16;
8890 }
8891 }
8892 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
8893 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
8894 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
8895 if (PPC_HA (offset + 16) != PPC_HA (offset))
8896 {
8897 bfd_put_32 (obfd, ADDI_R12_R12 | PPC_LO (offset), p), p += 4;
8898 offset = 0;
8899 }
8900 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
8901 bfd_put_32 (obfd, LD_R2_0R12 | PPC_LO (offset + 8), p), p += 4;
8902 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset + 16), p), p += 4;
8903 bfd_put_32 (obfd, BCTR, p), p += 4;
8904 }
8905 else
8906 {
8907 if (r != NULL)
8908 {
8909 r[0].r_offset += 4;
8910 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
8911 if (PPC_HA (offset + 16) != PPC_HA (offset))
8912 {
8913 r[1].r_offset = r[0].r_offset + 4;
8914 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16);
8915 r[1].r_addend = r[0].r_addend;
8916 }
8917 else
8918 {
8919 r[1].r_offset = r[0].r_offset + 8;
8920 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
8921 r[1].r_addend = r[0].r_addend + 16;
8922 r[2].r_offset = r[1].r_offset + 4;
8923 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
8924 r[2].r_addend = r[0].r_addend + 8;
8925 }
8926 }
8927 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
8928 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset), p), p += 4;
8929 if (PPC_HA (offset + 16) != PPC_HA (offset))
8930 {
8931 bfd_put_32 (obfd, ADDI_R2_R2 | PPC_LO (offset), p), p += 4;
8932 offset = 0;
8933 }
8934 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
8935 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset + 16), p), p += 4;
8936 bfd_put_32 (obfd, LD_R2_0R2 | PPC_LO (offset + 8), p), p += 4;
8937 bfd_put_32 (obfd, BCTR, p), p += 4;
8938 }
8939 return p;
8940 }
8941
8942 /* Build a special .plt call stub for __tls_get_addr. */
8943
8944 #define LD_R11_0R3 0xe9630000
8945 #define LD_R12_0R3 0xe9830000
8946 #define MR_R0_R3 0x7c601b78
8947 #define CMPDI_R11_0 0x2c2b0000
8948 #define ADD_R3_R12_R13 0x7c6c6a14
8949 #define BEQLR 0x4d820020
8950 #define MR_R3_R0 0x7c030378
8951 #define MFLR_R11 0x7d6802a6
8952 #define STD_R11_0R1 0xf9610000
8953 #define BCTRL 0x4e800421
8954 #define LD_R11_0R1 0xe9610000
8955 #define LD_R2_0R1 0xe8410000
8956 #define MTLR_R11 0x7d6803a6
8957
8958 static inline bfd_byte *
8959 build_tls_get_addr_stub (bfd *obfd, bfd_byte *p, int offset,
8960 Elf_Internal_Rela *r)
8961 {
8962 bfd_put_32 (obfd, LD_R11_0R3 + 0, p), p += 4;
8963 bfd_put_32 (obfd, LD_R12_0R3 + 8, p), p += 4;
8964 bfd_put_32 (obfd, MR_R0_R3, p), p += 4;
8965 bfd_put_32 (obfd, CMPDI_R11_0, p), p += 4;
8966 bfd_put_32 (obfd, ADD_R3_R12_R13, p), p += 4;
8967 bfd_put_32 (obfd, BEQLR, p), p += 4;
8968 bfd_put_32 (obfd, MR_R3_R0, p), p += 4;
8969 bfd_put_32 (obfd, MFLR_R11, p), p += 4;
8970 bfd_put_32 (obfd, STD_R11_0R1 + 32, p), p += 4;
8971
8972 if (r != NULL)
8973 r[0].r_offset += 9 * 4;
8974 p = build_plt_stub (obfd, p, offset, r);
8975 bfd_put_32 (obfd, BCTRL, p - 4);
8976
8977 bfd_put_32 (obfd, LD_R11_0R1 + 32, p), p += 4;
8978 bfd_put_32 (obfd, LD_R2_0R1 + 40, p), p += 4;
8979 bfd_put_32 (obfd, MTLR_R11, p), p += 4;
8980 bfd_put_32 (obfd, BLR, p), p += 4;
8981
8982 return p;
8983 }
8984
8985 static Elf_Internal_Rela *
8986 get_relocs (asection *sec, int count)
8987 {
8988 Elf_Internal_Rela *relocs;
8989 struct bfd_elf_section_data *elfsec_data;
8990
8991 elfsec_data = elf_section_data (sec);
8992 relocs = elfsec_data->relocs;
8993 if (relocs == NULL)
8994 {
8995 bfd_size_type relsize;
8996 relsize = sec->reloc_count * sizeof (*relocs);
8997 relocs = bfd_alloc (sec->owner, relsize);
8998 if (relocs == NULL)
8999 return NULL;
9000 elfsec_data->relocs = relocs;
9001 elfsec_data->rel_hdr.sh_size = (sec->reloc_count
9002 * sizeof (Elf64_External_Rela));
9003 elfsec_data->rel_hdr.sh_entsize = sizeof (Elf64_External_Rela);
9004 sec->reloc_count = 0;
9005 }
9006 relocs += sec->reloc_count;
9007 sec->reloc_count += count;
9008 return relocs;
9009 }
9010
9011 static bfd_boolean
9012 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
9013 {
9014 struct ppc_stub_hash_entry *stub_entry;
9015 struct ppc_branch_hash_entry *br_entry;
9016 struct bfd_link_info *info;
9017 struct ppc_link_hash_table *htab;
9018 bfd_byte *loc;
9019 bfd_byte *p;
9020 bfd_vma dest, off;
9021 int size;
9022 Elf_Internal_Rela *r;
9023 asection *plt;
9024
9025 /* Massage our args to the form they really have. */
9026 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
9027 info = in_arg;
9028
9029 htab = ppc_hash_table (info);
9030
9031 /* Make a note of the offset within the stubs for this entry. */
9032 stub_entry->stub_offset = stub_entry->stub_sec->size;
9033 loc = stub_entry->stub_sec->contents + stub_entry->stub_offset;
9034
9035 htab->stub_count[stub_entry->stub_type - 1] += 1;
9036 switch (stub_entry->stub_type)
9037 {
9038 case ppc_stub_long_branch:
9039 case ppc_stub_long_branch_r2off:
9040 /* Branches are relative. This is where we are going to. */
9041 off = dest = (stub_entry->target_value
9042 + stub_entry->target_section->output_offset
9043 + stub_entry->target_section->output_section->vma);
9044
9045 /* And this is where we are coming from. */
9046 off -= (stub_entry->stub_offset
9047 + stub_entry->stub_sec->output_offset
9048 + stub_entry->stub_sec->output_section->vma);
9049
9050 size = 4;
9051 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
9052 {
9053 bfd_vma r2off;
9054
9055 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
9056 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9057 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
9058 loc += 4;
9059 size = 12;
9060 if (PPC_HA (r2off) != 0)
9061 {
9062 size = 16;
9063 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
9064 loc += 4;
9065 }
9066 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
9067 loc += 4;
9068 off -= size - 4;
9069 }
9070 bfd_put_32 (htab->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
9071
9072 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
9073 {
9074 (*_bfd_error_handler) (_("long branch stub `%s' offset overflow"),
9075 stub_entry->root.string);
9076 htab->stub_error = TRUE;
9077 return FALSE;
9078 }
9079
9080 if (info->emitrelocations)
9081 {
9082 r = get_relocs (stub_entry->stub_sec, 1);
9083 if (r == NULL)
9084 return FALSE;
9085 r->r_offset = loc - stub_entry->stub_sec->contents;
9086 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
9087 r->r_addend = dest;
9088 if (stub_entry->h != NULL)
9089 {
9090 struct elf_link_hash_entry **hashes;
9091 unsigned long symndx;
9092 struct ppc_link_hash_entry *h;
9093
9094 hashes = elf_sym_hashes (htab->stub_bfd);
9095 if (hashes == NULL)
9096 {
9097 bfd_size_type hsize;
9098
9099 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
9100 hashes = bfd_zalloc (htab->stub_bfd, hsize);
9101 if (hashes == NULL)
9102 return FALSE;
9103 elf_sym_hashes (htab->stub_bfd) = hashes;
9104 htab->stub_globals = 1;
9105 }
9106 symndx = htab->stub_globals++;
9107 h = stub_entry->h;
9108 hashes[symndx] = &h->elf;
9109 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
9110 if (h->oh != NULL && h->oh->is_func)
9111 h = ppc_follow_link (h->oh);
9112 if (h->elf.root.u.def.section != stub_entry->target_section)
9113 /* H is an opd symbol. The addend must be zero. */
9114 r->r_addend = 0;
9115 else
9116 {
9117 off = (h->elf.root.u.def.value
9118 + h->elf.root.u.def.section->output_offset
9119 + h->elf.root.u.def.section->output_section->vma);
9120 r->r_addend -= off;
9121 }
9122 }
9123 }
9124 break;
9125
9126 case ppc_stub_plt_branch:
9127 case ppc_stub_plt_branch_r2off:
9128 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
9129 stub_entry->root.string + 9,
9130 FALSE, FALSE);
9131 if (br_entry == NULL)
9132 {
9133 (*_bfd_error_handler) (_("can't find branch stub `%s'"),
9134 stub_entry->root.string);
9135 htab->stub_error = TRUE;
9136 return FALSE;
9137 }
9138
9139 dest = (stub_entry->target_value
9140 + stub_entry->target_section->output_offset
9141 + stub_entry->target_section->output_section->vma);
9142
9143 bfd_put_64 (htab->brlt->owner, dest,
9144 htab->brlt->contents + br_entry->offset);
9145
9146 if (br_entry->iter == htab->stub_iteration)
9147 {
9148 br_entry->iter = 0;
9149
9150 if (htab->relbrlt != NULL)
9151 {
9152 /* Create a reloc for the branch lookup table entry. */
9153 Elf_Internal_Rela rela;
9154 bfd_byte *rl;
9155
9156 rela.r_offset = (br_entry->offset
9157 + htab->brlt->output_offset
9158 + htab->brlt->output_section->vma);
9159 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
9160 rela.r_addend = dest;
9161
9162 rl = htab->relbrlt->contents;
9163 rl += (htab->relbrlt->reloc_count++
9164 * sizeof (Elf64_External_Rela));
9165 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
9166 }
9167 else if (info->emitrelocations)
9168 {
9169 r = get_relocs (htab->brlt, 1);
9170 if (r == NULL)
9171 return FALSE;
9172 /* brlt, being SEC_LINKER_CREATED does not go through the
9173 normal reloc processing. Symbols and offsets are not
9174 translated from input file to output file form, so
9175 set up the offset per the output file. */
9176 r->r_offset = (br_entry->offset
9177 + htab->brlt->output_offset
9178 + htab->brlt->output_section->vma);
9179 r->r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
9180 r->r_addend = dest;
9181 }
9182 }
9183
9184 dest = (br_entry->offset
9185 + htab->brlt->output_offset
9186 + htab->brlt->output_section->vma);
9187
9188 off = (dest
9189 - elf_gp (htab->brlt->output_section->owner)
9190 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9191
9192 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
9193 {
9194 (*_bfd_error_handler)
9195 (_("linkage table error against `%s'"),
9196 stub_entry->root.string);
9197 bfd_set_error (bfd_error_bad_value);
9198 htab->stub_error = TRUE;
9199 return FALSE;
9200 }
9201
9202 if (info->emitrelocations)
9203 {
9204 r = get_relocs (stub_entry->stub_sec, 1 + (PPC_HA (off) != 0));
9205 if (r == NULL)
9206 return FALSE;
9207 r[0].r_offset = loc - stub_entry->stub_sec->contents;
9208 if (bfd_big_endian (info->output_bfd))
9209 r[0].r_offset += 2;
9210 if (stub_entry->stub_type == ppc_stub_plt_branch_r2off)
9211 r[0].r_offset += 4;
9212 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9213 r[0].r_addend = dest;
9214 if (PPC_HA (off) != 0)
9215 {
9216 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
9217 r[1].r_offset = r[0].r_offset + 4;
9218 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9219 r[1].r_addend = r[0].r_addend;
9220 }
9221 }
9222
9223 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
9224 {
9225 if (PPC_HA (off) != 0)
9226 {
9227 size = 16;
9228 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (off), loc);
9229 loc += 4;
9230 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (off), loc);
9231 }
9232 else
9233 {
9234 size = 12;
9235 bfd_put_32 (htab->stub_bfd, LD_R11_0R2 | PPC_LO (off), loc);
9236 }
9237 }
9238 else
9239 {
9240 bfd_vma r2off;
9241
9242 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
9243 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9244 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
9245 loc += 4;
9246 size = 20;
9247 if (PPC_HA (off) != 0)
9248 {
9249 size += 4;
9250 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (off), loc);
9251 loc += 4;
9252 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (off), loc);
9253 loc += 4;
9254 }
9255 else
9256 {
9257 bfd_put_32 (htab->stub_bfd, LD_R11_0R2 | PPC_LO (off), loc);
9258 loc += 4;
9259 }
9260
9261 if (PPC_HA (r2off) != 0)
9262 {
9263 size += 4;
9264 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
9265 loc += 4;
9266 }
9267 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
9268 }
9269 loc += 4;
9270 bfd_put_32 (htab->stub_bfd, MTCTR_R11, loc);
9271 loc += 4;
9272 bfd_put_32 (htab->stub_bfd, BCTR, loc);
9273 break;
9274
9275 case ppc_stub_plt_call:
9276 if (stub_entry->h != NULL
9277 && stub_entry->h->is_func_descriptor
9278 && stub_entry->h->oh != NULL)
9279 {
9280 struct ppc_link_hash_entry *fh = ppc_follow_link (stub_entry->h->oh);
9281
9282 /* If the old-ABI "dot-symbol" is undefined make it weak so
9283 we don't get a link error from RELOC_FOR_GLOBAL_SYMBOL.
9284 FIXME: We used to define the symbol on one of the call
9285 stubs instead, which is why we test symbol section id
9286 against htab->top_id in various places. Likely all
9287 these checks could now disappear. */
9288 if (fh->elf.root.type == bfd_link_hash_undefined)
9289 fh->elf.root.type = bfd_link_hash_undefweak;
9290 }
9291
9292 /* Now build the stub. */
9293 dest = stub_entry->plt_ent->plt.offset & ~1;
9294 if (dest >= (bfd_vma) -2)
9295 abort ();
9296
9297 plt = htab->plt;
9298 if (!htab->elf.dynamic_sections_created
9299 || stub_entry->h == NULL
9300 || stub_entry->h->elf.dynindx == -1)
9301 plt = htab->iplt;
9302
9303 dest += plt->output_offset + plt->output_section->vma;
9304
9305 if (stub_entry->h == NULL
9306 && (stub_entry->plt_ent->plt.offset & 1) == 0)
9307 {
9308 Elf_Internal_Rela rela;
9309 bfd_byte *rl;
9310
9311 rela.r_offset = dest;
9312 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
9313 rela.r_addend = (stub_entry->target_value
9314 + stub_entry->target_section->output_offset
9315 + stub_entry->target_section->output_section->vma);
9316
9317 rl = (htab->reliplt->contents
9318 + (htab->reliplt->reloc_count++
9319 * sizeof (Elf64_External_Rela)));
9320 bfd_elf64_swap_reloca_out (info->output_bfd, &rela, rl);
9321 stub_entry->plt_ent->plt.offset |= 1;
9322 }
9323
9324 off = (dest
9325 - elf_gp (plt->output_section->owner)
9326 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9327
9328 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
9329 {
9330 (*_bfd_error_handler)
9331 (_("linkage table error against `%s'"),
9332 stub_entry->h != NULL
9333 ? stub_entry->h->elf.root.root.string
9334 : "<local sym>");
9335 bfd_set_error (bfd_error_bad_value);
9336 htab->stub_error = TRUE;
9337 return FALSE;
9338 }
9339
9340 r = NULL;
9341 if (info->emitrelocations)
9342 {
9343 r = get_relocs (stub_entry->stub_sec,
9344 (2 + (PPC_HA (off) != 0)
9345 + (PPC_HA (off + 16) == PPC_HA (off))));
9346 if (r == NULL)
9347 return FALSE;
9348 r[0].r_offset = loc - stub_entry->stub_sec->contents;
9349 if (bfd_big_endian (info->output_bfd))
9350 r[0].r_offset += 2;
9351 r[0].r_addend = dest;
9352 }
9353 if (stub_entry->h != NULL
9354 && (stub_entry->h == htab->tls_get_addr_fd
9355 || stub_entry->h == htab->tls_get_addr)
9356 && !htab->no_tls_get_addr_opt)
9357 p = build_tls_get_addr_stub (htab->stub_bfd, loc, off, r);
9358 else
9359 p = build_plt_stub (htab->stub_bfd, loc, off, r);
9360 size = p - loc;
9361 break;
9362
9363 default:
9364 BFD_FAIL ();
9365 return FALSE;
9366 }
9367
9368 stub_entry->stub_sec->size += size;
9369
9370 if (htab->emit_stub_syms)
9371 {
9372 struct elf_link_hash_entry *h;
9373 size_t len1, len2;
9374 char *name;
9375 const char *const stub_str[] = { "long_branch",
9376 "long_branch_r2off",
9377 "plt_branch",
9378 "plt_branch_r2off",
9379 "plt_call" };
9380
9381 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
9382 len2 = strlen (stub_entry->root.string);
9383 name = bfd_malloc (len1 + len2 + 2);
9384 if (name == NULL)
9385 return FALSE;
9386 memcpy (name, stub_entry->root.string, 9);
9387 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
9388 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
9389 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
9390 if (h == NULL)
9391 return FALSE;
9392 if (h->root.type == bfd_link_hash_new)
9393 {
9394 h->root.type = bfd_link_hash_defined;
9395 h->root.u.def.section = stub_entry->stub_sec;
9396 h->root.u.def.value = stub_entry->stub_offset;
9397 h->ref_regular = 1;
9398 h->def_regular = 1;
9399 h->ref_regular_nonweak = 1;
9400 h->forced_local = 1;
9401 h->non_elf = 0;
9402 }
9403 }
9404
9405 return TRUE;
9406 }
9407
9408 /* As above, but don't actually build the stub. Just bump offset so
9409 we know stub section sizes, and select plt_branch stubs where
9410 long_branch stubs won't do. */
9411
9412 static bfd_boolean
9413 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
9414 {
9415 struct ppc_stub_hash_entry *stub_entry;
9416 struct bfd_link_info *info;
9417 struct ppc_link_hash_table *htab;
9418 bfd_vma off;
9419 int size;
9420
9421 /* Massage our args to the form they really have. */
9422 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
9423 info = in_arg;
9424
9425 htab = ppc_hash_table (info);
9426
9427 if (stub_entry->stub_type == ppc_stub_plt_call)
9428 {
9429 asection *plt;
9430 off = stub_entry->plt_ent->plt.offset & ~(bfd_vma) 1;
9431 if (off >= (bfd_vma) -2)
9432 abort ();
9433 plt = htab->plt;
9434 if (!htab->elf.dynamic_sections_created
9435 || stub_entry->h == NULL
9436 || stub_entry->h->elf.dynindx == -1)
9437 plt = htab->iplt;
9438 off += (plt->output_offset
9439 + plt->output_section->vma
9440 - elf_gp (plt->output_section->owner)
9441 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9442
9443 size = PLT_CALL_STUB_SIZE;
9444 if (PPC_HA (off) == 0)
9445 size -= 4;
9446 if (PPC_HA (off + 16) != PPC_HA (off))
9447 size += 4;
9448 if (stub_entry->h != NULL
9449 && (stub_entry->h == htab->tls_get_addr_fd
9450 || stub_entry->h == htab->tls_get_addr)
9451 && !htab->no_tls_get_addr_opt)
9452 size += 13 * 4;
9453 if (info->emitrelocations)
9454 {
9455 stub_entry->stub_sec->reloc_count
9456 += 2 + (PPC_HA (off) != 0) + (PPC_HA (off + 16) == PPC_HA (off));
9457 stub_entry->stub_sec->flags |= SEC_RELOC;
9458 }
9459 }
9460 else
9461 {
9462 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
9463 variants. */
9464 bfd_vma r2off = 0;
9465
9466 off = (stub_entry->target_value
9467 + stub_entry->target_section->output_offset
9468 + stub_entry->target_section->output_section->vma);
9469 off -= (stub_entry->stub_sec->size
9470 + stub_entry->stub_sec->output_offset
9471 + stub_entry->stub_sec->output_section->vma);
9472
9473 /* Reset the stub type from the plt variant in case we now
9474 can reach with a shorter stub. */
9475 if (stub_entry->stub_type >= ppc_stub_plt_branch)
9476 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
9477
9478 size = 4;
9479 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
9480 {
9481 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
9482 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9483 size = 12;
9484 if (PPC_HA (r2off) != 0)
9485 size = 16;
9486 off -= size - 4;
9487 }
9488
9489 /* If the branch offset if too big, use a ppc_stub_plt_branch. */
9490 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
9491 {
9492 struct ppc_branch_hash_entry *br_entry;
9493
9494 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
9495 stub_entry->root.string + 9,
9496 TRUE, FALSE);
9497 if (br_entry == NULL)
9498 {
9499 (*_bfd_error_handler) (_("can't build branch stub `%s'"),
9500 stub_entry->root.string);
9501 htab->stub_error = TRUE;
9502 return FALSE;
9503 }
9504
9505 if (br_entry->iter != htab->stub_iteration)
9506 {
9507 br_entry->iter = htab->stub_iteration;
9508 br_entry->offset = htab->brlt->size;
9509 htab->brlt->size += 8;
9510
9511 if (htab->relbrlt != NULL)
9512 htab->relbrlt->size += sizeof (Elf64_External_Rela);
9513 else if (info->emitrelocations)
9514 {
9515 htab->brlt->reloc_count += 1;
9516 htab->brlt->flags |= SEC_RELOC;
9517 }
9518 }
9519
9520 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
9521 off = (br_entry->offset
9522 + htab->brlt->output_offset
9523 + htab->brlt->output_section->vma
9524 - elf_gp (htab->brlt->output_section->owner)
9525 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9526
9527 if (info->emitrelocations)
9528 {
9529 stub_entry->stub_sec->reloc_count += 1 + (PPC_HA (off) != 0);
9530 stub_entry->stub_sec->flags |= SEC_RELOC;
9531 }
9532
9533 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
9534 {
9535 size = 12;
9536 if (PPC_HA (off) != 0)
9537 size = 16;
9538 }
9539 else
9540 {
9541 size = 20;
9542 if (PPC_HA (off) != 0)
9543 size += 4;
9544
9545 if (PPC_HA (r2off) != 0)
9546 size += 4;
9547 }
9548 }
9549 else if (info->emitrelocations)
9550 {
9551 stub_entry->stub_sec->reloc_count += 1;
9552 stub_entry->stub_sec->flags |= SEC_RELOC;
9553 }
9554 }
9555
9556 stub_entry->stub_sec->size += size;
9557 return TRUE;
9558 }
9559
9560 /* Set up various things so that we can make a list of input sections
9561 for each output section included in the link. Returns -1 on error,
9562 0 when no stubs will be needed, and 1 on success. */
9563
9564 int
9565 ppc64_elf_setup_section_lists (bfd *output_bfd,
9566 struct bfd_link_info *info,
9567 int no_multi_toc)
9568 {
9569 bfd *input_bfd;
9570 int top_id, top_index, id;
9571 asection *section;
9572 asection **input_list;
9573 bfd_size_type amt;
9574 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9575
9576 htab->no_multi_toc = no_multi_toc;
9577
9578 if (htab->brlt == NULL)
9579 return 0;
9580
9581 /* Find the top input section id. */
9582 for (input_bfd = info->input_bfds, top_id = 3;
9583 input_bfd != NULL;
9584 input_bfd = input_bfd->link_next)
9585 {
9586 for (section = input_bfd->sections;
9587 section != NULL;
9588 section = section->next)
9589 {
9590 if (top_id < section->id)
9591 top_id = section->id;
9592 }
9593 }
9594
9595 htab->top_id = top_id;
9596 amt = sizeof (struct map_stub) * (top_id + 1);
9597 htab->stub_group = bfd_zmalloc (amt);
9598 if (htab->stub_group == NULL)
9599 return -1;
9600
9601 /* Set toc_off for com, und, abs and ind sections. */
9602 for (id = 0; id < 3; id++)
9603 htab->stub_group[id].toc_off = TOC_BASE_OFF;
9604
9605 elf_gp (output_bfd) = htab->toc_curr = ppc64_elf_toc (output_bfd);
9606
9607 /* We can't use output_bfd->section_count here to find the top output
9608 section index as some sections may have been removed, and
9609 strip_excluded_output_sections doesn't renumber the indices. */
9610 for (section = output_bfd->sections, top_index = 0;
9611 section != NULL;
9612 section = section->next)
9613 {
9614 if (top_index < section->index)
9615 top_index = section->index;
9616 }
9617
9618 htab->top_index = top_index;
9619 amt = sizeof (asection *) * (top_index + 1);
9620 input_list = bfd_zmalloc (amt);
9621 htab->input_list = input_list;
9622 if (input_list == NULL)
9623 return -1;
9624
9625 return 1;
9626 }
9627
9628 /* The linker repeatedly calls this function for each TOC input section
9629 and linker generated GOT section. Group input bfds such that the toc
9630 within a group is less than 64k in size. Will break with cute linker
9631 scripts that play games with dot in the output toc section. */
9632
9633 void
9634 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
9635 {
9636 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9637
9638 if (!htab->no_multi_toc)
9639 {
9640 bfd_vma addr = isec->output_offset + isec->output_section->vma;
9641 bfd_vma off = addr - htab->toc_curr;
9642
9643 if (off + isec->size > 0x10000)
9644 htab->toc_curr = addr;
9645
9646 elf_gp (isec->owner) = (htab->toc_curr
9647 - elf_gp (isec->output_section->owner)
9648 + TOC_BASE_OFF);
9649 }
9650 }
9651
9652 /* Called after the last call to the above function. */
9653
9654 void
9655 ppc64_elf_reinit_toc (bfd *output_bfd, struct bfd_link_info *info)
9656 {
9657 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9658
9659 htab->multi_toc_needed = htab->toc_curr != elf_gp (output_bfd);
9660
9661 /* toc_curr tracks the TOC offset used for code sections below in
9662 ppc64_elf_next_input_section. Start off at 0x8000. */
9663 htab->toc_curr = TOC_BASE_OFF;
9664 }
9665
9666 /* No toc references were found in ISEC. If the code in ISEC makes no
9667 calls, then there's no need to use toc adjusting stubs when branching
9668 into ISEC. Actually, indirect calls from ISEC are OK as they will
9669 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
9670 needed, and 2 if a cyclical call-graph was found but no other reason
9671 for a stub was detected. If called from the top level, a return of
9672 2 means the same as a return of 0. */
9673
9674 static int
9675 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
9676 {
9677 Elf_Internal_Rela *relstart, *rel;
9678 Elf_Internal_Sym *local_syms;
9679 int ret;
9680 struct ppc_link_hash_table *htab;
9681
9682 /* We know none of our code bearing sections will need toc stubs. */
9683 if ((isec->flags & SEC_LINKER_CREATED) != 0)
9684 return 0;
9685
9686 if (isec->size == 0)
9687 return 0;
9688
9689 if (isec->output_section == NULL)
9690 return 0;
9691
9692 if (isec->reloc_count == 0)
9693 return 0;
9694
9695 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
9696 info->keep_memory);
9697 if (relstart == NULL)
9698 return -1;
9699
9700 /* Look for branches to outside of this section. */
9701 local_syms = NULL;
9702 ret = 0;
9703 htab = ppc_hash_table (info);
9704 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
9705 {
9706 enum elf_ppc64_reloc_type r_type;
9707 unsigned long r_symndx;
9708 struct elf_link_hash_entry *h;
9709 struct ppc_link_hash_entry *eh;
9710 Elf_Internal_Sym *sym;
9711 asection *sym_sec;
9712 struct _opd_sec_data *opd;
9713 bfd_vma sym_value;
9714 bfd_vma dest;
9715
9716 r_type = ELF64_R_TYPE (rel->r_info);
9717 if (r_type != R_PPC64_REL24
9718 && r_type != R_PPC64_REL14
9719 && r_type != R_PPC64_REL14_BRTAKEN
9720 && r_type != R_PPC64_REL14_BRNTAKEN)
9721 continue;
9722
9723 r_symndx = ELF64_R_SYM (rel->r_info);
9724 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
9725 isec->owner))
9726 {
9727 ret = -1;
9728 break;
9729 }
9730
9731 /* Calls to dynamic lib functions go through a plt call stub
9732 that uses r2. */
9733 eh = (struct ppc_link_hash_entry *) h;
9734 if (eh != NULL
9735 && (eh->elf.plt.plist != NULL
9736 || (eh->oh != NULL
9737 && ppc_follow_link (eh->oh)->elf.plt.plist != NULL)))
9738 {
9739 ret = 1;
9740 break;
9741 }
9742
9743 if (sym_sec == NULL)
9744 /* Ignore other undefined symbols. */
9745 continue;
9746
9747 /* Assume branches to other sections not included in the link need
9748 stubs too, to cover -R and absolute syms. */
9749 if (sym_sec->output_section == NULL)
9750 {
9751 ret = 1;
9752 break;
9753 }
9754
9755 if (h == NULL)
9756 sym_value = sym->st_value;
9757 else
9758 {
9759 if (h->root.type != bfd_link_hash_defined
9760 && h->root.type != bfd_link_hash_defweak)
9761 abort ();
9762 sym_value = h->root.u.def.value;
9763 }
9764 sym_value += rel->r_addend;
9765
9766 /* If this branch reloc uses an opd sym, find the code section. */
9767 opd = get_opd_info (sym_sec);
9768 if (opd != NULL)
9769 {
9770 if (h == NULL && opd->adjust != NULL)
9771 {
9772 long adjust;
9773
9774 adjust = opd->adjust[sym->st_value / 8];
9775 if (adjust == -1)
9776 /* Assume deleted functions won't ever be called. */
9777 continue;
9778 sym_value += adjust;
9779 }
9780
9781 dest = opd_entry_value (sym_sec, sym_value, &sym_sec, NULL);
9782 if (dest == (bfd_vma) -1)
9783 continue;
9784 }
9785 else
9786 dest = (sym_value
9787 + sym_sec->output_offset
9788 + sym_sec->output_section->vma);
9789
9790 /* Ignore branch to self. */
9791 if (sym_sec == isec)
9792 continue;
9793
9794 /* If the called function uses the toc, we need a stub. */
9795 if (sym_sec->has_toc_reloc
9796 || sym_sec->makes_toc_func_call)
9797 {
9798 ret = 1;
9799 break;
9800 }
9801
9802 /* Assume any branch that needs a long branch stub might in fact
9803 need a plt_branch stub. A plt_branch stub uses r2. */
9804 else if (dest - (isec->output_offset
9805 + isec->output_section->vma
9806 + rel->r_offset) + (1 << 25) >= (2 << 25))
9807 {
9808 ret = 1;
9809 break;
9810 }
9811
9812 /* If calling back to a section in the process of being tested, we
9813 can't say for sure that no toc adjusting stubs are needed, so
9814 don't return zero. */
9815 else if (sym_sec->call_check_in_progress)
9816 ret = 2;
9817
9818 /* Branches to another section that itself doesn't have any TOC
9819 references are OK. Recursively call ourselves to check. */
9820 else if (sym_sec->id <= htab->top_id
9821 && htab->stub_group[sym_sec->id].toc_off == 0)
9822 {
9823 int recur;
9824
9825 /* Mark current section as indeterminate, so that other
9826 sections that call back to current won't be marked as
9827 known. */
9828 isec->call_check_in_progress = 1;
9829 recur = toc_adjusting_stub_needed (info, sym_sec);
9830 isec->call_check_in_progress = 0;
9831
9832 if (recur < 0)
9833 {
9834 /* An error. Exit. */
9835 ret = -1;
9836 break;
9837 }
9838 else if (recur <= 1)
9839 {
9840 /* Known result. Mark as checked and set section flag. */
9841 htab->stub_group[sym_sec->id].toc_off = 1;
9842 if (recur != 0)
9843 {
9844 sym_sec->makes_toc_func_call = 1;
9845 ret = 1;
9846 break;
9847 }
9848 }
9849 else
9850 {
9851 /* Unknown result. Continue checking. */
9852 ret = 2;
9853 }
9854 }
9855 }
9856
9857 if (local_syms != NULL
9858 && (elf_symtab_hdr (isec->owner).contents != (unsigned char *) local_syms))
9859 free (local_syms);
9860 if (elf_section_data (isec)->relocs != relstart)
9861 free (relstart);
9862
9863 return ret;
9864 }
9865
9866 /* The linker repeatedly calls this function for each input section,
9867 in the order that input sections are linked into output sections.
9868 Build lists of input sections to determine groupings between which
9869 we may insert linker stubs. */
9870
9871 bfd_boolean
9872 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
9873 {
9874 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9875
9876 if ((isec->output_section->flags & SEC_CODE) != 0
9877 && isec->output_section->index <= htab->top_index)
9878 {
9879 asection **list = htab->input_list + isec->output_section->index;
9880 /* Steal the link_sec pointer for our list. */
9881 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
9882 /* This happens to make the list in reverse order,
9883 which is what we want. */
9884 PREV_SEC (isec) = *list;
9885 *list = isec;
9886 }
9887
9888 if (htab->multi_toc_needed)
9889 {
9890 /* If a code section has a function that uses the TOC then we need
9891 to use the right TOC (obviously). Also, make sure that .opd gets
9892 the correct TOC value for R_PPC64_TOC relocs that don't have or
9893 can't find their function symbol (shouldn't ever happen now).
9894 Also specially treat .fixup for the linux kernel. .fixup
9895 contains branches, but only back to the function that hit an
9896 exception. */
9897 if (isec->has_toc_reloc
9898 || (isec->flags & SEC_CODE) == 0
9899 || strcmp (isec->name, ".fixup") == 0)
9900 {
9901 if (elf_gp (isec->owner) != 0)
9902 htab->toc_curr = elf_gp (isec->owner);
9903 }
9904 else if (htab->stub_group[isec->id].toc_off == 0)
9905 {
9906 int ret = toc_adjusting_stub_needed (info, isec);
9907 if (ret < 0)
9908 return FALSE;
9909 else
9910 isec->makes_toc_func_call = ret & 1;
9911 }
9912 }
9913
9914 /* Functions that don't use the TOC can belong in any TOC group.
9915 Use the last TOC base. This happens to make _init and _fini
9916 pasting work. */
9917 htab->stub_group[isec->id].toc_off = htab->toc_curr;
9918 return TRUE;
9919 }
9920
9921 /* See whether we can group stub sections together. Grouping stub
9922 sections may result in fewer stubs. More importantly, we need to
9923 put all .init* and .fini* stubs at the beginning of the .init or
9924 .fini output sections respectively, because glibc splits the
9925 _init and _fini functions into multiple parts. Putting a stub in
9926 the middle of a function is not a good idea. */
9927
9928 static void
9929 group_sections (struct ppc_link_hash_table *htab,
9930 bfd_size_type stub_group_size,
9931 bfd_boolean stubs_always_before_branch)
9932 {
9933 asection **list;
9934 bfd_size_type stub14_group_size;
9935 bfd_boolean suppress_size_errors;
9936
9937 suppress_size_errors = FALSE;
9938 stub14_group_size = stub_group_size;
9939 if (stub_group_size == 1)
9940 {
9941 /* Default values. */
9942 if (stubs_always_before_branch)
9943 {
9944 stub_group_size = 0x1e00000;
9945 stub14_group_size = 0x7800;
9946 }
9947 else
9948 {
9949 stub_group_size = 0x1c00000;
9950 stub14_group_size = 0x7000;
9951 }
9952 suppress_size_errors = TRUE;
9953 }
9954
9955 list = htab->input_list + htab->top_index;
9956 do
9957 {
9958 asection *tail = *list;
9959 while (tail != NULL)
9960 {
9961 asection *curr;
9962 asection *prev;
9963 bfd_size_type total;
9964 bfd_boolean big_sec;
9965 bfd_vma curr_toc;
9966
9967 curr = tail;
9968 total = tail->size;
9969 big_sec = total > (ppc64_elf_section_data (tail)->has_14bit_branch
9970 ? stub14_group_size : stub_group_size);
9971 if (big_sec && !suppress_size_errors)
9972 (*_bfd_error_handler) (_("%B section %A exceeds stub group size"),
9973 tail->owner, tail);
9974 curr_toc = htab->stub_group[tail->id].toc_off;
9975
9976 while ((prev = PREV_SEC (curr)) != NULL
9977 && ((total += curr->output_offset - prev->output_offset)
9978 < (ppc64_elf_section_data (prev)->has_14bit_branch
9979 ? stub14_group_size : stub_group_size))
9980 && htab->stub_group[prev->id].toc_off == curr_toc)
9981 curr = prev;
9982
9983 /* OK, the size from the start of CURR to the end is less
9984 than stub_group_size and thus can be handled by one stub
9985 section. (or the tail section is itself larger than
9986 stub_group_size, in which case we may be toast.) We
9987 should really be keeping track of the total size of stubs
9988 added here, as stubs contribute to the final output
9989 section size. That's a little tricky, and this way will
9990 only break if stubs added make the total size more than
9991 2^25, ie. for the default stub_group_size, if stubs total
9992 more than 2097152 bytes, or nearly 75000 plt call stubs. */
9993 do
9994 {
9995 prev = PREV_SEC (tail);
9996 /* Set up this stub group. */
9997 htab->stub_group[tail->id].link_sec = curr;
9998 }
9999 while (tail != curr && (tail = prev) != NULL);
10000
10001 /* But wait, there's more! Input sections up to stub_group_size
10002 bytes before the stub section can be handled by it too.
10003 Don't do this if we have a really large section after the
10004 stubs, as adding more stubs increases the chance that
10005 branches may not reach into the stub section. */
10006 if (!stubs_always_before_branch && !big_sec)
10007 {
10008 total = 0;
10009 while (prev != NULL
10010 && ((total += tail->output_offset - prev->output_offset)
10011 < (ppc64_elf_section_data (prev)->has_14bit_branch
10012 ? stub14_group_size : stub_group_size))
10013 && htab->stub_group[prev->id].toc_off == curr_toc)
10014 {
10015 tail = prev;
10016 prev = PREV_SEC (tail);
10017 htab->stub_group[tail->id].link_sec = curr;
10018 }
10019 }
10020 tail = prev;
10021 }
10022 }
10023 while (list-- != htab->input_list);
10024 free (htab->input_list);
10025 #undef PREV_SEC
10026 }
10027
10028 /* Determine and set the size of the stub section for a final link.
10029
10030 The basic idea here is to examine all the relocations looking for
10031 PC-relative calls to a target that is unreachable with a "bl"
10032 instruction. */
10033
10034 bfd_boolean
10035 ppc64_elf_size_stubs (bfd *output_bfd,
10036 struct bfd_link_info *info,
10037 bfd_signed_vma group_size,
10038 asection *(*add_stub_section) (const char *, asection *),
10039 void (*layout_sections_again) (void))
10040 {
10041 bfd_size_type stub_group_size;
10042 bfd_boolean stubs_always_before_branch;
10043 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10044
10045 /* Stash our params away. */
10046 htab->add_stub_section = add_stub_section;
10047 htab->layout_sections_again = layout_sections_again;
10048 stubs_always_before_branch = group_size < 0;
10049 if (group_size < 0)
10050 stub_group_size = -group_size;
10051 else
10052 stub_group_size = group_size;
10053
10054 group_sections (htab, stub_group_size, stubs_always_before_branch);
10055
10056 while (1)
10057 {
10058 bfd *input_bfd;
10059 unsigned int bfd_indx;
10060 asection *stub_sec;
10061
10062 htab->stub_iteration += 1;
10063
10064 for (input_bfd = info->input_bfds, bfd_indx = 0;
10065 input_bfd != NULL;
10066 input_bfd = input_bfd->link_next, bfd_indx++)
10067 {
10068 Elf_Internal_Shdr *symtab_hdr;
10069 asection *section;
10070 Elf_Internal_Sym *local_syms = NULL;
10071
10072 if (!is_ppc64_elf (input_bfd))
10073 continue;
10074
10075 /* We'll need the symbol table in a second. */
10076 symtab_hdr = &elf_symtab_hdr (input_bfd);
10077 if (symtab_hdr->sh_info == 0)
10078 continue;
10079
10080 /* Walk over each section attached to the input bfd. */
10081 for (section = input_bfd->sections;
10082 section != NULL;
10083 section = section->next)
10084 {
10085 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
10086
10087 /* If there aren't any relocs, then there's nothing more
10088 to do. */
10089 if ((section->flags & SEC_RELOC) == 0
10090 || (section->flags & SEC_ALLOC) == 0
10091 || (section->flags & SEC_LOAD) == 0
10092 || (section->flags & SEC_CODE) == 0
10093 || section->reloc_count == 0)
10094 continue;
10095
10096 /* If this section is a link-once section that will be
10097 discarded, then don't create any stubs. */
10098 if (section->output_section == NULL
10099 || section->output_section->owner != output_bfd)
10100 continue;
10101
10102 /* Get the relocs. */
10103 internal_relocs
10104 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
10105 info->keep_memory);
10106 if (internal_relocs == NULL)
10107 goto error_ret_free_local;
10108
10109 /* Now examine each relocation. */
10110 irela = internal_relocs;
10111 irelaend = irela + section->reloc_count;
10112 for (; irela < irelaend; irela++)
10113 {
10114 enum elf_ppc64_reloc_type r_type;
10115 unsigned int r_indx;
10116 enum ppc_stub_type stub_type;
10117 struct ppc_stub_hash_entry *stub_entry;
10118 asection *sym_sec, *code_sec;
10119 bfd_vma sym_value, code_value;
10120 bfd_vma destination;
10121 bfd_boolean ok_dest;
10122 struct ppc_link_hash_entry *hash;
10123 struct ppc_link_hash_entry *fdh;
10124 struct elf_link_hash_entry *h;
10125 Elf_Internal_Sym *sym;
10126 char *stub_name;
10127 const asection *id_sec;
10128 struct _opd_sec_data *opd;
10129 struct plt_entry *plt_ent;
10130
10131 r_type = ELF64_R_TYPE (irela->r_info);
10132 r_indx = ELF64_R_SYM (irela->r_info);
10133
10134 if (r_type >= R_PPC64_max)
10135 {
10136 bfd_set_error (bfd_error_bad_value);
10137 goto error_ret_free_internal;
10138 }
10139
10140 /* Only look for stubs on branch instructions. */
10141 if (r_type != R_PPC64_REL24
10142 && r_type != R_PPC64_REL14
10143 && r_type != R_PPC64_REL14_BRTAKEN
10144 && r_type != R_PPC64_REL14_BRNTAKEN)
10145 continue;
10146
10147 /* Now determine the call target, its name, value,
10148 section. */
10149 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
10150 r_indx, input_bfd))
10151 goto error_ret_free_internal;
10152 hash = (struct ppc_link_hash_entry *) h;
10153
10154 ok_dest = FALSE;
10155 fdh = NULL;
10156 sym_value = 0;
10157 if (hash == NULL)
10158 {
10159 sym_value = sym->st_value;
10160 ok_dest = TRUE;
10161 }
10162 else if (hash->elf.root.type == bfd_link_hash_defined
10163 || hash->elf.root.type == bfd_link_hash_defweak)
10164 {
10165 sym_value = hash->elf.root.u.def.value;
10166 if (sym_sec->output_section != NULL)
10167 ok_dest = TRUE;
10168 }
10169 else if (hash->elf.root.type == bfd_link_hash_undefweak
10170 || hash->elf.root.type == bfd_link_hash_undefined)
10171 {
10172 /* Recognise an old ABI func code entry sym, and
10173 use the func descriptor sym instead if it is
10174 defined. */
10175 if (hash->elf.root.root.string[0] == '.'
10176 && (fdh = lookup_fdh (hash, htab)) != NULL)
10177 {
10178 if (fdh->elf.root.type == bfd_link_hash_defined
10179 || fdh->elf.root.type == bfd_link_hash_defweak)
10180 {
10181 sym_sec = fdh->elf.root.u.def.section;
10182 sym_value = fdh->elf.root.u.def.value;
10183 if (sym_sec->output_section != NULL)
10184 ok_dest = TRUE;
10185 }
10186 else
10187 fdh = NULL;
10188 }
10189 }
10190 else
10191 {
10192 bfd_set_error (bfd_error_bad_value);
10193 goto error_ret_free_internal;
10194 }
10195
10196 destination = 0;
10197 if (ok_dest)
10198 {
10199 sym_value += irela->r_addend;
10200 destination = (sym_value
10201 + sym_sec->output_offset
10202 + sym_sec->output_section->vma);
10203 }
10204
10205 code_sec = sym_sec;
10206 code_value = sym_value;
10207 opd = get_opd_info (sym_sec);
10208 if (opd != NULL)
10209 {
10210 bfd_vma dest;
10211
10212 if (hash == NULL && opd->adjust != NULL)
10213 {
10214 long adjust = opd->adjust[sym_value / 8];
10215 if (adjust == -1)
10216 continue;
10217 code_value += adjust;
10218 sym_value += adjust;
10219 }
10220 dest = opd_entry_value (sym_sec, sym_value,
10221 &code_sec, &code_value);
10222 if (dest != (bfd_vma) -1)
10223 {
10224 destination = dest;
10225 if (fdh != NULL)
10226 {
10227 /* Fixup old ABI sym to point at code
10228 entry. */
10229 hash->elf.root.type = bfd_link_hash_defweak;
10230 hash->elf.root.u.def.section = code_sec;
10231 hash->elf.root.u.def.value = code_value;
10232 }
10233 }
10234 }
10235
10236 /* Determine what (if any) linker stub is needed. */
10237 plt_ent = NULL;
10238 stub_type = ppc_type_of_stub (section, irela, &hash,
10239 &plt_ent, destination);
10240
10241 if (stub_type != ppc_stub_plt_call)
10242 {
10243 /* Check whether we need a TOC adjusting stub.
10244 Since the linker pastes together pieces from
10245 different object files when creating the
10246 _init and _fini functions, it may be that a
10247 call to what looks like a local sym is in
10248 fact a call needing a TOC adjustment. */
10249 if (code_sec != NULL
10250 && code_sec->output_section != NULL
10251 && (htab->stub_group[code_sec->id].toc_off
10252 != htab->stub_group[section->id].toc_off)
10253 && (code_sec->has_toc_reloc
10254 || code_sec->makes_toc_func_call))
10255 stub_type = ppc_stub_long_branch_r2off;
10256 }
10257
10258 if (stub_type == ppc_stub_none)
10259 continue;
10260
10261 /* __tls_get_addr calls might be eliminated. */
10262 if (stub_type != ppc_stub_plt_call
10263 && hash != NULL
10264 && (hash == htab->tls_get_addr
10265 || hash == htab->tls_get_addr_fd)
10266 && section->has_tls_reloc
10267 && irela != internal_relocs)
10268 {
10269 /* Get tls info. */
10270 char *tls_mask;
10271
10272 if (!get_tls_mask (&tls_mask, NULL, NULL, &local_syms,
10273 irela - 1, input_bfd))
10274 goto error_ret_free_internal;
10275 if (*tls_mask != 0)
10276 continue;
10277 }
10278
10279 /* Support for grouping stub sections. */
10280 id_sec = htab->stub_group[section->id].link_sec;
10281
10282 /* Get the name of this stub. */
10283 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
10284 if (!stub_name)
10285 goto error_ret_free_internal;
10286
10287 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
10288 stub_name, FALSE, FALSE);
10289 if (stub_entry != NULL)
10290 {
10291 /* The proper stub has already been created. */
10292 free (stub_name);
10293 continue;
10294 }
10295
10296 stub_entry = ppc_add_stub (stub_name, section, htab);
10297 if (stub_entry == NULL)
10298 {
10299 free (stub_name);
10300 error_ret_free_internal:
10301 if (elf_section_data (section)->relocs == NULL)
10302 free (internal_relocs);
10303 error_ret_free_local:
10304 if (local_syms != NULL
10305 && (symtab_hdr->contents
10306 != (unsigned char *) local_syms))
10307 free (local_syms);
10308 return FALSE;
10309 }
10310
10311 stub_entry->stub_type = stub_type;
10312 if (stub_type != ppc_stub_plt_call)
10313 {
10314 stub_entry->target_value = code_value;
10315 stub_entry->target_section = code_sec;
10316 }
10317 else
10318 {
10319 stub_entry->target_value = sym_value;
10320 stub_entry->target_section = sym_sec;
10321 }
10322 stub_entry->h = hash;
10323 stub_entry->plt_ent = plt_ent;
10324 stub_entry->addend = irela->r_addend;
10325
10326 if (stub_entry->h != NULL)
10327 htab->stub_globals += 1;
10328 }
10329
10330 /* We're done with the internal relocs, free them. */
10331 if (elf_section_data (section)->relocs != internal_relocs)
10332 free (internal_relocs);
10333 }
10334
10335 if (local_syms != NULL
10336 && symtab_hdr->contents != (unsigned char *) local_syms)
10337 {
10338 if (!info->keep_memory)
10339 free (local_syms);
10340 else
10341 symtab_hdr->contents = (unsigned char *) local_syms;
10342 }
10343 }
10344
10345 /* We may have added some stubs. Find out the new size of the
10346 stub sections. */
10347 for (stub_sec = htab->stub_bfd->sections;
10348 stub_sec != NULL;
10349 stub_sec = stub_sec->next)
10350 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
10351 {
10352 stub_sec->rawsize = stub_sec->size;
10353 stub_sec->size = 0;
10354 stub_sec->reloc_count = 0;
10355 stub_sec->flags &= ~SEC_RELOC;
10356 }
10357
10358 htab->brlt->size = 0;
10359 htab->brlt->reloc_count = 0;
10360 htab->brlt->flags &= ~SEC_RELOC;
10361 if (htab->relbrlt != NULL)
10362 htab->relbrlt->size = 0;
10363
10364 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
10365
10366 if (info->emitrelocations
10367 && htab->glink != NULL && htab->glink->size != 0)
10368 {
10369 htab->glink->reloc_count = 1;
10370 htab->glink->flags |= SEC_RELOC;
10371 }
10372
10373 for (stub_sec = htab->stub_bfd->sections;
10374 stub_sec != NULL;
10375 stub_sec = stub_sec->next)
10376 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
10377 && stub_sec->rawsize != stub_sec->size)
10378 break;
10379
10380 /* Exit from this loop when no stubs have been added, and no stubs
10381 have changed size. */
10382 if (stub_sec == NULL)
10383 break;
10384
10385 /* Ask the linker to do its stuff. */
10386 (*htab->layout_sections_again) ();
10387 }
10388
10389 /* It would be nice to strip htab->brlt from the output if the
10390 section is empty, but it's too late. If we strip sections here,
10391 the dynamic symbol table is corrupted since the section symbol
10392 for the stripped section isn't written. */
10393
10394 return TRUE;
10395 }
10396
10397 /* Called after we have determined section placement. If sections
10398 move, we'll be called again. Provide a value for TOCstart. */
10399
10400 bfd_vma
10401 ppc64_elf_toc (bfd *obfd)
10402 {
10403 asection *s;
10404 bfd_vma TOCstart;
10405
10406 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
10407 order. The TOC starts where the first of these sections starts. */
10408 s = bfd_get_section_by_name (obfd, ".got");
10409 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
10410 s = bfd_get_section_by_name (obfd, ".toc");
10411 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
10412 s = bfd_get_section_by_name (obfd, ".tocbss");
10413 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
10414 s = bfd_get_section_by_name (obfd, ".plt");
10415 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
10416 {
10417 /* This may happen for
10418 o references to TOC base (SYM@toc / TOC[tc0]) without a
10419 .toc directive
10420 o bad linker script
10421 o --gc-sections and empty TOC sections
10422
10423 FIXME: Warn user? */
10424
10425 /* Look for a likely section. We probably won't even be
10426 using TOCstart. */
10427 for (s = obfd->sections; s != NULL; s = s->next)
10428 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY
10429 | SEC_EXCLUDE))
10430 == (SEC_ALLOC | SEC_SMALL_DATA))
10431 break;
10432 if (s == NULL)
10433 for (s = obfd->sections; s != NULL; s = s->next)
10434 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_EXCLUDE))
10435 == (SEC_ALLOC | SEC_SMALL_DATA))
10436 break;
10437 if (s == NULL)
10438 for (s = obfd->sections; s != NULL; s = s->next)
10439 if ((s->flags & (SEC_ALLOC | SEC_READONLY | SEC_EXCLUDE))
10440 == SEC_ALLOC)
10441 break;
10442 if (s == NULL)
10443 for (s = obfd->sections; s != NULL; s = s->next)
10444 if ((s->flags & (SEC_ALLOC | SEC_EXCLUDE)) == SEC_ALLOC)
10445 break;
10446 }
10447
10448 TOCstart = 0;
10449 if (s != NULL)
10450 TOCstart = s->output_section->vma + s->output_offset;
10451
10452 return TOCstart;
10453 }
10454
10455 /* Build all the stubs associated with the current output file.
10456 The stubs are kept in a hash table attached to the main linker
10457 hash table. This function is called via gldelf64ppc_finish. */
10458
10459 bfd_boolean
10460 ppc64_elf_build_stubs (bfd_boolean emit_stub_syms,
10461 struct bfd_link_info *info,
10462 char **stats)
10463 {
10464 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10465 asection *stub_sec;
10466 bfd_byte *p;
10467 int stub_sec_count = 0;
10468
10469 htab->emit_stub_syms = emit_stub_syms;
10470
10471 /* Allocate memory to hold the linker stubs. */
10472 for (stub_sec = htab->stub_bfd->sections;
10473 stub_sec != NULL;
10474 stub_sec = stub_sec->next)
10475 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
10476 && stub_sec->size != 0)
10477 {
10478 stub_sec->contents = bfd_zalloc (htab->stub_bfd, stub_sec->size);
10479 if (stub_sec->contents == NULL)
10480 return FALSE;
10481 /* We want to check that built size is the same as calculated
10482 size. rawsize is a convenient location to use. */
10483 stub_sec->rawsize = stub_sec->size;
10484 stub_sec->size = 0;
10485 }
10486
10487 if (htab->glink != NULL && htab->glink->size != 0)
10488 {
10489 unsigned int indx;
10490 bfd_vma plt0;
10491
10492 /* Build the .glink plt call stub. */
10493 if (htab->emit_stub_syms)
10494 {
10495 struct elf_link_hash_entry *h;
10496 h = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
10497 TRUE, FALSE, FALSE);
10498 if (h == NULL)
10499 return FALSE;
10500 if (h->root.type == bfd_link_hash_new)
10501 {
10502 h->root.type = bfd_link_hash_defined;
10503 h->root.u.def.section = htab->glink;
10504 h->root.u.def.value = 8;
10505 h->ref_regular = 1;
10506 h->def_regular = 1;
10507 h->ref_regular_nonweak = 1;
10508 h->forced_local = 1;
10509 h->non_elf = 0;
10510 }
10511 }
10512 plt0 = htab->plt->output_section->vma + htab->plt->output_offset - 16;
10513 if (info->emitrelocations)
10514 {
10515 Elf_Internal_Rela *r = get_relocs (htab->glink, 1);
10516 if (r == NULL)
10517 return FALSE;
10518 r->r_offset = (htab->glink->output_offset
10519 + htab->glink->output_section->vma);
10520 r->r_info = ELF64_R_INFO (0, R_PPC64_REL64);
10521 r->r_addend = plt0;
10522 }
10523 p = htab->glink->contents;
10524 plt0 -= htab->glink->output_section->vma + htab->glink->output_offset;
10525 bfd_put_64 (htab->glink->owner, plt0, p);
10526 p += 8;
10527 bfd_put_32 (htab->glink->owner, MFLR_R12, p);
10528 p += 4;
10529 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
10530 p += 4;
10531 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
10532 p += 4;
10533 bfd_put_32 (htab->glink->owner, LD_R2_M16R11, p);
10534 p += 4;
10535 bfd_put_32 (htab->glink->owner, MTLR_R12, p);
10536 p += 4;
10537 bfd_put_32 (htab->glink->owner, ADD_R12_R2_R11, p);
10538 p += 4;
10539 bfd_put_32 (htab->glink->owner, LD_R11_0R12, p);
10540 p += 4;
10541 bfd_put_32 (htab->glink->owner, LD_R2_0R12 | 8, p);
10542 p += 4;
10543 bfd_put_32 (htab->glink->owner, MTCTR_R11, p);
10544 p += 4;
10545 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | 16, p);
10546 p += 4;
10547 bfd_put_32 (htab->glink->owner, BCTR, p);
10548 p += 4;
10549 while (p - htab->glink->contents < GLINK_CALL_STUB_SIZE)
10550 {
10551 bfd_put_32 (htab->glink->owner, NOP, p);
10552 p += 4;
10553 }
10554
10555 /* Build the .glink lazy link call stubs. */
10556 indx = 0;
10557 while (p < htab->glink->contents + htab->glink->size)
10558 {
10559 if (indx < 0x8000)
10560 {
10561 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
10562 p += 4;
10563 }
10564 else
10565 {
10566 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
10567 p += 4;
10568 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx), p);
10569 p += 4;
10570 }
10571 bfd_put_32 (htab->glink->owner,
10572 B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p);
10573 indx++;
10574 p += 4;
10575 }
10576 htab->glink->rawsize = p - htab->glink->contents;
10577 }
10578
10579 if (htab->brlt->size != 0)
10580 {
10581 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
10582 htab->brlt->size);
10583 if (htab->brlt->contents == NULL)
10584 return FALSE;
10585 }
10586 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
10587 {
10588 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
10589 htab->relbrlt->size);
10590 if (htab->relbrlt->contents == NULL)
10591 return FALSE;
10592 }
10593
10594 /* Build the stubs as directed by the stub hash table. */
10595 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
10596
10597 if (htab->relbrlt != NULL)
10598 htab->relbrlt->reloc_count = 0;
10599
10600 for (stub_sec = htab->stub_bfd->sections;
10601 stub_sec != NULL;
10602 stub_sec = stub_sec->next)
10603 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
10604 {
10605 stub_sec_count += 1;
10606 if (stub_sec->rawsize != stub_sec->size)
10607 break;
10608 }
10609
10610 if (stub_sec != NULL
10611 || htab->glink->rawsize != htab->glink->size)
10612 {
10613 htab->stub_error = TRUE;
10614 (*_bfd_error_handler) (_("stubs don't match calculated size"));
10615 }
10616
10617 if (htab->stub_error)
10618 return FALSE;
10619
10620 if (stats != NULL)
10621 {
10622 *stats = bfd_malloc (500);
10623 if (*stats == NULL)
10624 return FALSE;
10625
10626 sprintf (*stats, _("linker stubs in %u group%s\n"
10627 " branch %lu\n"
10628 " toc adjust %lu\n"
10629 " long branch %lu\n"
10630 " long toc adj %lu\n"
10631 " plt call %lu"),
10632 stub_sec_count,
10633 stub_sec_count == 1 ? "" : "s",
10634 htab->stub_count[ppc_stub_long_branch - 1],
10635 htab->stub_count[ppc_stub_long_branch_r2off - 1],
10636 htab->stub_count[ppc_stub_plt_branch - 1],
10637 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
10638 htab->stub_count[ppc_stub_plt_call - 1]);
10639 }
10640 return TRUE;
10641 }
10642
10643 /* This function undoes the changes made by add_symbol_adjust. */
10644
10645 static bfd_boolean
10646 undo_symbol_twiddle (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
10647 {
10648 struct ppc_link_hash_entry *eh;
10649
10650 if (h->root.type == bfd_link_hash_indirect)
10651 return TRUE;
10652
10653 if (h->root.type == bfd_link_hash_warning)
10654 h = (struct elf_link_hash_entry *) h->root.u.i.link;
10655
10656 eh = (struct ppc_link_hash_entry *) h;
10657 if (eh->elf.root.type != bfd_link_hash_undefweak || !eh->was_undefined)
10658 return TRUE;
10659
10660 eh->elf.root.type = bfd_link_hash_undefined;
10661 return TRUE;
10662 }
10663
10664 void
10665 ppc64_elf_restore_symbols (struct bfd_link_info *info)
10666 {
10667 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10668 elf_link_hash_traverse (&htab->elf, undo_symbol_twiddle, info);
10669 }
10670
10671 /* What to do when ld finds relocations against symbols defined in
10672 discarded sections. */
10673
10674 static unsigned int
10675 ppc64_elf_action_discarded (asection *sec)
10676 {
10677 if (strcmp (".opd", sec->name) == 0)
10678 return 0;
10679
10680 if (strcmp (".toc", sec->name) == 0)
10681 return 0;
10682
10683 if (strcmp (".toc1", sec->name) == 0)
10684 return 0;
10685
10686 return _bfd_elf_default_action_discarded (sec);
10687 }
10688
10689 /* The RELOCATE_SECTION function is called by the ELF backend linker
10690 to handle the relocations for a section.
10691
10692 The relocs are always passed as Rela structures; if the section
10693 actually uses Rel structures, the r_addend field will always be
10694 zero.
10695
10696 This function is responsible for adjust the section contents as
10697 necessary, and (if using Rela relocs and generating a
10698 relocatable output file) adjusting the reloc addend as
10699 necessary.
10700
10701 This function does not have to worry about setting the reloc
10702 address or the reloc symbol index.
10703
10704 LOCAL_SYMS is a pointer to the swapped in local symbols.
10705
10706 LOCAL_SECTIONS is an array giving the section in the input file
10707 corresponding to the st_shndx field of each local symbol.
10708
10709 The global hash table entry for the global symbols can be found
10710 via elf_sym_hashes (input_bfd).
10711
10712 When generating relocatable output, this function must handle
10713 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
10714 going to be the section symbol corresponding to the output
10715 section, which means that the addend must be adjusted
10716 accordingly. */
10717
10718 static bfd_boolean
10719 ppc64_elf_relocate_section (bfd *output_bfd,
10720 struct bfd_link_info *info,
10721 bfd *input_bfd,
10722 asection *input_section,
10723 bfd_byte *contents,
10724 Elf_Internal_Rela *relocs,
10725 Elf_Internal_Sym *local_syms,
10726 asection **local_sections)
10727 {
10728 struct ppc_link_hash_table *htab;
10729 Elf_Internal_Shdr *symtab_hdr;
10730 struct elf_link_hash_entry **sym_hashes;
10731 Elf_Internal_Rela *rel;
10732 Elf_Internal_Rela *relend;
10733 Elf_Internal_Rela outrel;
10734 bfd_byte *loc;
10735 struct got_entry **local_got_ents;
10736 bfd_vma TOCstart;
10737 bfd_boolean ret = TRUE;
10738 bfd_boolean is_opd;
10739 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
10740 bfd_boolean is_power4 = FALSE;
10741 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
10742
10743 /* Initialize howto table if needed. */
10744 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
10745 ppc_howto_init ();
10746
10747 htab = ppc_hash_table (info);
10748
10749 /* Don't relocate stub sections. */
10750 if (input_section->owner == htab->stub_bfd)
10751 return TRUE;
10752
10753 BFD_ASSERT (is_ppc64_elf (input_bfd));
10754
10755 local_got_ents = elf_local_got_ents (input_bfd);
10756 TOCstart = elf_gp (output_bfd);
10757 symtab_hdr = &elf_symtab_hdr (input_bfd);
10758 sym_hashes = elf_sym_hashes (input_bfd);
10759 is_opd = ppc64_elf_section_data (input_section)->sec_type == sec_opd;
10760
10761 rel = relocs;
10762 relend = relocs + input_section->reloc_count;
10763 for (; rel < relend; rel++)
10764 {
10765 enum elf_ppc64_reloc_type r_type;
10766 bfd_vma addend, orig_addend;
10767 bfd_reloc_status_type r;
10768 Elf_Internal_Sym *sym;
10769 asection *sec;
10770 struct elf_link_hash_entry *h_elf;
10771 struct ppc_link_hash_entry *h;
10772 struct ppc_link_hash_entry *fdh;
10773 const char *sym_name;
10774 unsigned long r_symndx, toc_symndx;
10775 bfd_vma toc_addend;
10776 char tls_mask, tls_gd, tls_type;
10777 char sym_type;
10778 bfd_vma relocation;
10779 bfd_boolean unresolved_reloc;
10780 bfd_boolean warned;
10781 unsigned long insn, mask;
10782 struct ppc_stub_hash_entry *stub_entry;
10783 bfd_vma max_br_offset;
10784 bfd_vma from;
10785
10786 r_type = ELF64_R_TYPE (rel->r_info);
10787 r_symndx = ELF64_R_SYM (rel->r_info);
10788
10789 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
10790 symbol of the previous ADDR64 reloc. The symbol gives us the
10791 proper TOC base to use. */
10792 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
10793 && rel != relocs
10794 && ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_ADDR64
10795 && is_opd)
10796 r_symndx = ELF64_R_SYM (rel[-1].r_info);
10797
10798 sym = NULL;
10799 sec = NULL;
10800 h_elf = NULL;
10801 sym_name = NULL;
10802 unresolved_reloc = FALSE;
10803 warned = FALSE;
10804 orig_addend = rel->r_addend;
10805
10806 if (r_symndx < symtab_hdr->sh_info)
10807 {
10808 /* It's a local symbol. */
10809 struct _opd_sec_data *opd;
10810
10811 sym = local_syms + r_symndx;
10812 sec = local_sections[r_symndx];
10813 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
10814 sym_type = ELF64_ST_TYPE (sym->st_info);
10815 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
10816 opd = get_opd_info (sec);
10817 if (opd != NULL && opd->adjust != NULL)
10818 {
10819 long adjust = opd->adjust[(sym->st_value + rel->r_addend) / 8];
10820 if (adjust == -1)
10821 relocation = 0;
10822 else
10823 {
10824 /* If this is a relocation against the opd section sym
10825 and we have edited .opd, adjust the reloc addend so
10826 that ld -r and ld --emit-relocs output is correct.
10827 If it is a reloc against some other .opd symbol,
10828 then the symbol value will be adjusted later. */
10829 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
10830 rel->r_addend += adjust;
10831 else
10832 relocation += adjust;
10833 }
10834 }
10835 }
10836 else
10837 {
10838 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
10839 r_symndx, symtab_hdr, sym_hashes,
10840 h_elf, sec, relocation,
10841 unresolved_reloc, warned);
10842 sym_name = h_elf->root.root.string;
10843 sym_type = h_elf->type;
10844 }
10845 h = (struct ppc_link_hash_entry *) h_elf;
10846
10847 if (sec != NULL && elf_discarded_section (sec))
10848 {
10849 /* For relocs against symbols from removed linkonce sections,
10850 or sections discarded by a linker script, we just want the
10851 section contents zeroed. Avoid any special processing. */
10852 _bfd_clear_contents (ppc64_elf_howto_table[r_type], input_bfd,
10853 contents + rel->r_offset);
10854 rel->r_info = 0;
10855 rel->r_addend = 0;
10856 continue;
10857 }
10858
10859 if (info->relocatable)
10860 continue;
10861
10862 /* TLS optimizations. Replace instruction sequences and relocs
10863 based on information we collected in tls_optimize. We edit
10864 RELOCS so that --emit-relocs will output something sensible
10865 for the final instruction stream. */
10866 tls_mask = 0;
10867 tls_gd = 0;
10868 toc_symndx = 0;
10869 if (h != NULL)
10870 tls_mask = h->tls_mask;
10871 else if (local_got_ents != NULL)
10872 {
10873 struct plt_entry **local_plt = (struct plt_entry **)
10874 (local_got_ents + symtab_hdr->sh_info);
10875 char *lgot_masks = (char *)
10876 (local_plt + symtab_hdr->sh_info);
10877 tls_mask = lgot_masks[r_symndx];
10878 }
10879 if (tls_mask == 0
10880 && (r_type == R_PPC64_TLS
10881 || r_type == R_PPC64_TLSGD
10882 || r_type == R_PPC64_TLSLD))
10883 {
10884 /* Check for toc tls entries. */
10885 char *toc_tls;
10886
10887 if (!get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
10888 &local_syms, rel, input_bfd))
10889 return FALSE;
10890
10891 if (toc_tls)
10892 tls_mask = *toc_tls;
10893 }
10894
10895 /* Check that tls relocs are used with tls syms, and non-tls
10896 relocs are used with non-tls syms. */
10897 if (r_symndx != 0
10898 && r_type != R_PPC64_NONE
10899 && (h == NULL
10900 || h->elf.root.type == bfd_link_hash_defined
10901 || h->elf.root.type == bfd_link_hash_defweak)
10902 && (IS_PPC64_TLS_RELOC (r_type)
10903 != (sym_type == STT_TLS
10904 || (sym_type == STT_SECTION
10905 && (sec->flags & SEC_THREAD_LOCAL) != 0))))
10906 {
10907 if (tls_mask != 0
10908 && (r_type == R_PPC64_TLS
10909 || r_type == R_PPC64_TLSGD
10910 || r_type == R_PPC64_TLSLD))
10911 /* R_PPC64_TLS is OK against a symbol in the TOC. */
10912 ;
10913 else
10914 (*_bfd_error_handler)
10915 (!IS_PPC64_TLS_RELOC (r_type)
10916 ? _("%B(%A+0x%lx): %s used with TLS symbol %s")
10917 : _("%B(%A+0x%lx): %s used with non-TLS symbol %s"),
10918 input_bfd,
10919 input_section,
10920 (long) rel->r_offset,
10921 ppc64_elf_howto_table[r_type]->name,
10922 sym_name);
10923 }
10924
10925 /* Ensure reloc mapping code below stays sane. */
10926 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
10927 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
10928 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
10929 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
10930 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
10931 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
10932 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
10933 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
10934 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
10935 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
10936 abort ();
10937
10938 switch (r_type)
10939 {
10940 default:
10941 break;
10942
10943 case R_PPC64_TOC16:
10944 case R_PPC64_TOC16_LO:
10945 case R_PPC64_TOC16_DS:
10946 case R_PPC64_TOC16_LO_DS:
10947 {
10948 /* Check for toc tls entries. */
10949 char *toc_tls;
10950 int retval;
10951
10952 retval = get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
10953 &local_syms, rel, input_bfd);
10954 if (retval == 0)
10955 return FALSE;
10956
10957 if (toc_tls)
10958 {
10959 tls_mask = *toc_tls;
10960 if (r_type == R_PPC64_TOC16_DS
10961 || r_type == R_PPC64_TOC16_LO_DS)
10962 {
10963 if (tls_mask != 0
10964 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
10965 goto toctprel;
10966 }
10967 else
10968 {
10969 /* If we found a GD reloc pair, then we might be
10970 doing a GD->IE transition. */
10971 if (retval == 2)
10972 {
10973 tls_gd = TLS_TPRELGD;
10974 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
10975 goto tls_ldgd_opt;
10976 }
10977 else if (retval == 3)
10978 {
10979 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
10980 goto tls_ldgd_opt;
10981 }
10982 }
10983 }
10984 }
10985 break;
10986
10987 case R_PPC64_GOT_TPREL16_DS:
10988 case R_PPC64_GOT_TPREL16_LO_DS:
10989 if (tls_mask != 0
10990 && (tls_mask & TLS_TPREL) == 0)
10991 {
10992 toctprel:
10993 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
10994 insn &= 31 << 21;
10995 insn |= 0x3c0d0000; /* addis 0,13,0 */
10996 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
10997 r_type = R_PPC64_TPREL16_HA;
10998 if (toc_symndx != 0)
10999 {
11000 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
11001 rel->r_addend = toc_addend;
11002 /* We changed the symbol. Start over in order to
11003 get h, sym, sec etc. right. */
11004 rel--;
11005 continue;
11006 }
11007 else
11008 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11009 }
11010 break;
11011
11012 case R_PPC64_TLS:
11013 if (tls_mask != 0
11014 && (tls_mask & TLS_TPREL) == 0)
11015 {
11016 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
11017 insn = _bfd_elf_ppc_at_tls_transform (insn, 13);
11018 if (insn == 0)
11019 abort ();
11020 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
11021 /* Was PPC64_TLS which sits on insn boundary, now
11022 PPC64_TPREL16_LO which is at low-order half-word. */
11023 rel->r_offset += d_offset;
11024 r_type = R_PPC64_TPREL16_LO;
11025 if (toc_symndx != 0)
11026 {
11027 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
11028 rel->r_addend = toc_addend;
11029 /* We changed the symbol. Start over in order to
11030 get h, sym, sec etc. right. */
11031 rel--;
11032 continue;
11033 }
11034 else
11035 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11036 }
11037 break;
11038
11039 case R_PPC64_GOT_TLSGD16_HI:
11040 case R_PPC64_GOT_TLSGD16_HA:
11041 tls_gd = TLS_TPRELGD;
11042 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
11043 goto tls_gdld_hi;
11044 break;
11045
11046 case R_PPC64_GOT_TLSLD16_HI:
11047 case R_PPC64_GOT_TLSLD16_HA:
11048 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
11049 {
11050 tls_gdld_hi:
11051 if ((tls_mask & tls_gd) != 0)
11052 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
11053 + R_PPC64_GOT_TPREL16_DS);
11054 else
11055 {
11056 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
11057 rel->r_offset -= d_offset;
11058 r_type = R_PPC64_NONE;
11059 }
11060 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11061 }
11062 break;
11063
11064 case R_PPC64_GOT_TLSGD16:
11065 case R_PPC64_GOT_TLSGD16_LO:
11066 tls_gd = TLS_TPRELGD;
11067 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
11068 goto tls_ldgd_opt;
11069 break;
11070
11071 case R_PPC64_GOT_TLSLD16:
11072 case R_PPC64_GOT_TLSLD16_LO:
11073 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
11074 {
11075 unsigned int insn1, insn2, insn3;
11076 bfd_vma offset;
11077
11078 tls_ldgd_opt:
11079 offset = (bfd_vma) -1;
11080 /* If not using the newer R_PPC64_TLSGD/LD to mark
11081 __tls_get_addr calls, we must trust that the call
11082 stays with its arg setup insns, ie. that the next
11083 reloc is the __tls_get_addr call associated with
11084 the current reloc. Edit both insns. */
11085 if (input_section->has_tls_get_addr_call
11086 && rel + 1 < relend
11087 && branch_reloc_hash_match (input_bfd, rel + 1,
11088 htab->tls_get_addr,
11089 htab->tls_get_addr_fd))
11090 offset = rel[1].r_offset;
11091 if ((tls_mask & tls_gd) != 0)
11092 {
11093 /* IE */
11094 insn1 = bfd_get_32 (output_bfd,
11095 contents + rel->r_offset - d_offset);
11096 insn1 &= (1 << 26) - (1 << 2);
11097 insn1 |= 58 << 26; /* ld */
11098 insn2 = 0x7c636a14; /* add 3,3,13 */
11099 if (offset != (bfd_vma) -1)
11100 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
11101 if ((tls_mask & TLS_EXPLICIT) == 0)
11102 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
11103 + R_PPC64_GOT_TPREL16_DS);
11104 else
11105 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
11106 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11107 }
11108 else
11109 {
11110 /* LE */
11111 insn1 = 0x3c6d0000; /* addis 3,13,0 */
11112 insn2 = 0x38630000; /* addi 3,3,0 */
11113 if (tls_gd == 0)
11114 {
11115 /* Was an LD reloc. */
11116 if (toc_symndx)
11117 sec = local_sections[toc_symndx];
11118 for (r_symndx = 0;
11119 r_symndx < symtab_hdr->sh_info;
11120 r_symndx++)
11121 if (local_sections[r_symndx] == sec)
11122 break;
11123 if (r_symndx >= symtab_hdr->sh_info)
11124 r_symndx = 0;
11125 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
11126 if (r_symndx != 0)
11127 rel->r_addend -= (local_syms[r_symndx].st_value
11128 + sec->output_offset
11129 + sec->output_section->vma);
11130 }
11131 else if (toc_symndx != 0)
11132 {
11133 r_symndx = toc_symndx;
11134 rel->r_addend = toc_addend;
11135 }
11136 r_type = R_PPC64_TPREL16_HA;
11137 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11138 if (offset != (bfd_vma) -1)
11139 {
11140 rel[1].r_info = ELF64_R_INFO (r_symndx,
11141 R_PPC64_TPREL16_LO);
11142 rel[1].r_offset = offset + d_offset;
11143 rel[1].r_addend = rel->r_addend;
11144 }
11145 }
11146 bfd_put_32 (output_bfd, insn1,
11147 contents + rel->r_offset - d_offset);
11148 if (offset != (bfd_vma) -1)
11149 {
11150 insn3 = bfd_get_32 (output_bfd,
11151 contents + offset + 4);
11152 if (insn3 == NOP
11153 || insn3 == CROR_151515 || insn3 == CROR_313131)
11154 {
11155 rel[1].r_offset += 4;
11156 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
11157 insn2 = NOP;
11158 }
11159 bfd_put_32 (output_bfd, insn2, contents + offset);
11160 }
11161 if ((tls_mask & tls_gd) == 0
11162 && (tls_gd == 0 || toc_symndx != 0))
11163 {
11164 /* We changed the symbol. Start over in order
11165 to get h, sym, sec etc. right. */
11166 rel--;
11167 continue;
11168 }
11169 }
11170 break;
11171
11172 case R_PPC64_TLSGD:
11173 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
11174 {
11175 unsigned int insn2, insn3;
11176 bfd_vma offset = rel->r_offset;
11177
11178 if ((tls_mask & TLS_TPRELGD) != 0)
11179 {
11180 /* IE */
11181 r_type = R_PPC64_NONE;
11182 insn2 = 0x7c636a14; /* add 3,3,13 */
11183 }
11184 else
11185 {
11186 /* LE */
11187 if (toc_symndx != 0)
11188 {
11189 r_symndx = toc_symndx;
11190 rel->r_addend = toc_addend;
11191 }
11192 r_type = R_PPC64_TPREL16_LO;
11193 rel->r_offset = offset + d_offset;
11194 insn2 = 0x38630000; /* addi 3,3,0 */
11195 }
11196 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11197 /* Zap the reloc on the _tls_get_addr call too. */
11198 BFD_ASSERT (offset == rel[1].r_offset);
11199 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
11200 insn3 = bfd_get_32 (output_bfd,
11201 contents + offset + 4);
11202 if (insn3 == NOP
11203 || insn3 == CROR_151515 || insn3 == CROR_313131)
11204 {
11205 rel->r_offset += 4;
11206 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
11207 insn2 = NOP;
11208 }
11209 bfd_put_32 (output_bfd, insn2, contents + offset);
11210 if ((tls_mask & TLS_TPRELGD) == 0 && toc_symndx != 0)
11211 {
11212 rel--;
11213 continue;
11214 }
11215 }
11216 break;
11217
11218 case R_PPC64_TLSLD:
11219 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
11220 {
11221 unsigned int insn2, insn3;
11222 bfd_vma offset = rel->r_offset;
11223
11224 if (toc_symndx)
11225 sec = local_sections[toc_symndx];
11226 for (r_symndx = 0;
11227 r_symndx < symtab_hdr->sh_info;
11228 r_symndx++)
11229 if (local_sections[r_symndx] == sec)
11230 break;
11231 if (r_symndx >= symtab_hdr->sh_info)
11232 r_symndx = 0;
11233 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
11234 if (r_symndx != 0)
11235 rel->r_addend -= (local_syms[r_symndx].st_value
11236 + sec->output_offset
11237 + sec->output_section->vma);
11238
11239 r_type = R_PPC64_TPREL16_LO;
11240 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11241 rel->r_offset = offset + d_offset;
11242 /* Zap the reloc on the _tls_get_addr call too. */
11243 BFD_ASSERT (offset == rel[1].r_offset);
11244 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
11245 insn2 = 0x38630000; /* addi 3,3,0 */
11246 insn3 = bfd_get_32 (output_bfd,
11247 contents + offset + 4);
11248 if (insn3 == NOP
11249 || insn3 == CROR_151515 || insn3 == CROR_313131)
11250 {
11251 rel->r_offset += 4;
11252 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
11253 insn2 = NOP;
11254 }
11255 bfd_put_32 (output_bfd, insn2, contents + offset);
11256 rel--;
11257 continue;
11258 }
11259 break;
11260
11261 case R_PPC64_DTPMOD64:
11262 if (rel + 1 < relend
11263 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
11264 && rel[1].r_offset == rel->r_offset + 8)
11265 {
11266 if ((tls_mask & TLS_GD) == 0)
11267 {
11268 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
11269 if ((tls_mask & TLS_TPRELGD) != 0)
11270 r_type = R_PPC64_TPREL64;
11271 else
11272 {
11273 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
11274 r_type = R_PPC64_NONE;
11275 }
11276 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11277 }
11278 }
11279 else
11280 {
11281 if ((tls_mask & TLS_LD) == 0)
11282 {
11283 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
11284 r_type = R_PPC64_NONE;
11285 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11286 }
11287 }
11288 break;
11289
11290 case R_PPC64_TPREL64:
11291 if ((tls_mask & TLS_TPREL) == 0)
11292 {
11293 r_type = R_PPC64_NONE;
11294 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11295 }
11296 break;
11297 }
11298
11299 /* Handle other relocations that tweak non-addend part of insn. */
11300 insn = 0;
11301 max_br_offset = 1 << 25;
11302 addend = rel->r_addend;
11303 switch (r_type)
11304 {
11305 default:
11306 break;
11307
11308 /* Branch taken prediction relocations. */
11309 case R_PPC64_ADDR14_BRTAKEN:
11310 case R_PPC64_REL14_BRTAKEN:
11311 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
11312 /* Fall thru. */
11313
11314 /* Branch not taken prediction relocations. */
11315 case R_PPC64_ADDR14_BRNTAKEN:
11316 case R_PPC64_REL14_BRNTAKEN:
11317 insn |= bfd_get_32 (output_bfd,
11318 contents + rel->r_offset) & ~(0x01 << 21);
11319 /* Fall thru. */
11320
11321 case R_PPC64_REL14:
11322 max_br_offset = 1 << 15;
11323 /* Fall thru. */
11324
11325 case R_PPC64_REL24:
11326 /* Calls to functions with a different TOC, such as calls to
11327 shared objects, need to alter the TOC pointer. This is
11328 done using a linkage stub. A REL24 branching to these
11329 linkage stubs needs to be followed by a nop, as the nop
11330 will be replaced with an instruction to restore the TOC
11331 base pointer. */
11332 stub_entry = NULL;
11333 fdh = h;
11334 if (h != NULL
11335 && h->oh != NULL
11336 && h->oh->is_func_descriptor)
11337 fdh = ppc_follow_link (h->oh);
11338 if (((fdh != NULL
11339 && fdh->elf.plt.plist != NULL)
11340 || (sec != NULL
11341 && sec->output_section != NULL
11342 && sec->id <= htab->top_id
11343 && (htab->stub_group[sec->id].toc_off
11344 != htab->stub_group[input_section->id].toc_off))
11345 || (h == NULL
11346 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
11347 && (stub_entry = ppc_get_stub_entry (input_section, sec, fdh,
11348 rel, htab)) != NULL
11349 && (stub_entry->stub_type == ppc_stub_plt_call
11350 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
11351 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
11352 {
11353 bfd_boolean can_plt_call = FALSE;
11354
11355 if (rel->r_offset + 8 <= input_section->size)
11356 {
11357 unsigned long nop;
11358 nop = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
11359 if (nop == NOP
11360 || nop == CROR_151515 || nop == CROR_313131)
11361 {
11362 if (h != NULL
11363 && (h == htab->tls_get_addr_fd
11364 || h == htab->tls_get_addr)
11365 && !htab->no_tls_get_addr_opt)
11366 {
11367 /* Special stub used, leave nop alone. */
11368 }
11369 else
11370 bfd_put_32 (input_bfd, LD_R2_40R1,
11371 contents + rel->r_offset + 4);
11372 can_plt_call = TRUE;
11373 }
11374 }
11375
11376 if (!can_plt_call)
11377 {
11378 if (stub_entry->stub_type == ppc_stub_plt_call)
11379 {
11380 /* If this is a plain branch rather than a branch
11381 and link, don't require a nop. However, don't
11382 allow tail calls in a shared library as they
11383 will result in r2 being corrupted. */
11384 unsigned long br;
11385 br = bfd_get_32 (input_bfd, contents + rel->r_offset);
11386 if (info->executable && (br & 1) == 0)
11387 can_plt_call = TRUE;
11388 else
11389 stub_entry = NULL;
11390 }
11391 else if (h != NULL
11392 && strcmp (h->elf.root.root.string,
11393 ".__libc_start_main") == 0)
11394 {
11395 /* Allow crt1 branch to go via a toc adjusting stub. */
11396 can_plt_call = TRUE;
11397 }
11398 else
11399 {
11400 if (strcmp (input_section->output_section->name,
11401 ".init") == 0
11402 || strcmp (input_section->output_section->name,
11403 ".fini") == 0)
11404 (*_bfd_error_handler)
11405 (_("%B(%A+0x%lx): automatic multiple TOCs "
11406 "not supported using your crt files; "
11407 "recompile with -mminimal-toc or upgrade gcc"),
11408 input_bfd,
11409 input_section,
11410 (long) rel->r_offset);
11411 else
11412 (*_bfd_error_handler)
11413 (_("%B(%A+0x%lx): sibling call optimization to `%s' "
11414 "does not allow automatic multiple TOCs; "
11415 "recompile with -mminimal-toc or "
11416 "-fno-optimize-sibling-calls, "
11417 "or make `%s' extern"),
11418 input_bfd,
11419 input_section,
11420 (long) rel->r_offset,
11421 sym_name,
11422 sym_name);
11423 bfd_set_error (bfd_error_bad_value);
11424 ret = FALSE;
11425 }
11426 }
11427
11428 if (can_plt_call
11429 && stub_entry->stub_type == ppc_stub_plt_call)
11430 unresolved_reloc = FALSE;
11431 }
11432
11433 if (stub_entry == NULL
11434 && get_opd_info (sec) != NULL)
11435 {
11436 /* The branch destination is the value of the opd entry. */
11437 bfd_vma off = (relocation + addend
11438 - sec->output_section->vma
11439 - sec->output_offset);
11440 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL);
11441 if (dest != (bfd_vma) -1)
11442 {
11443 relocation = dest;
11444 addend = 0;
11445 }
11446 }
11447
11448 /* If the branch is out of reach we ought to have a long
11449 branch stub. */
11450 from = (rel->r_offset
11451 + input_section->output_offset
11452 + input_section->output_section->vma);
11453
11454 if (stub_entry == NULL
11455 && (relocation + addend - from + max_br_offset
11456 >= 2 * max_br_offset)
11457 && r_type != R_PPC64_ADDR14_BRTAKEN
11458 && r_type != R_PPC64_ADDR14_BRNTAKEN)
11459 stub_entry = ppc_get_stub_entry (input_section, sec, h, rel,
11460 htab);
11461
11462 if (stub_entry != NULL)
11463 {
11464 /* Munge up the value and addend so that we call the stub
11465 rather than the procedure directly. */
11466 relocation = (stub_entry->stub_offset
11467 + stub_entry->stub_sec->output_offset
11468 + stub_entry->stub_sec->output_section->vma);
11469 addend = 0;
11470 }
11471
11472 if (insn != 0)
11473 {
11474 if (is_power4)
11475 {
11476 /* Set 'a' bit. This is 0b00010 in BO field for branch
11477 on CR(BI) insns (BO == 001at or 011at), and 0b01000
11478 for branch on CTR insns (BO == 1a00t or 1a01t). */
11479 if ((insn & (0x14 << 21)) == (0x04 << 21))
11480 insn |= 0x02 << 21;
11481 else if ((insn & (0x14 << 21)) == (0x10 << 21))
11482 insn |= 0x08 << 21;
11483 else
11484 break;
11485 }
11486 else
11487 {
11488 /* Invert 'y' bit if not the default. */
11489 if ((bfd_signed_vma) (relocation + addend - from) < 0)
11490 insn ^= 0x01 << 21;
11491 }
11492
11493 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
11494 }
11495
11496 /* NOP out calls to undefined weak functions.
11497 We can thus call a weak function without first
11498 checking whether the function is defined. */
11499 else if (h != NULL
11500 && h->elf.root.type == bfd_link_hash_undefweak
11501 && r_type == R_PPC64_REL24
11502 && relocation == 0
11503 && addend == 0)
11504 {
11505 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
11506 continue;
11507 }
11508 break;
11509 }
11510
11511 /* Set `addend'. */
11512 tls_type = 0;
11513 switch (r_type)
11514 {
11515 default:
11516 (*_bfd_error_handler)
11517 (_("%B: unknown relocation type %d for symbol %s"),
11518 input_bfd, (int) r_type, sym_name);
11519
11520 bfd_set_error (bfd_error_bad_value);
11521 ret = FALSE;
11522 continue;
11523
11524 case R_PPC64_NONE:
11525 case R_PPC64_TLS:
11526 case R_PPC64_TLSGD:
11527 case R_PPC64_TLSLD:
11528 case R_PPC64_GNU_VTINHERIT:
11529 case R_PPC64_GNU_VTENTRY:
11530 continue;
11531
11532 /* GOT16 relocations. Like an ADDR16 using the symbol's
11533 address in the GOT as relocation value instead of the
11534 symbol's value itself. Also, create a GOT entry for the
11535 symbol and put the symbol value there. */
11536 case R_PPC64_GOT_TLSGD16:
11537 case R_PPC64_GOT_TLSGD16_LO:
11538 case R_PPC64_GOT_TLSGD16_HI:
11539 case R_PPC64_GOT_TLSGD16_HA:
11540 tls_type = TLS_TLS | TLS_GD;
11541 goto dogot;
11542
11543 case R_PPC64_GOT_TLSLD16:
11544 case R_PPC64_GOT_TLSLD16_LO:
11545 case R_PPC64_GOT_TLSLD16_HI:
11546 case R_PPC64_GOT_TLSLD16_HA:
11547 tls_type = TLS_TLS | TLS_LD;
11548 goto dogot;
11549
11550 case R_PPC64_GOT_TPREL16_DS:
11551 case R_PPC64_GOT_TPREL16_LO_DS:
11552 case R_PPC64_GOT_TPREL16_HI:
11553 case R_PPC64_GOT_TPREL16_HA:
11554 tls_type = TLS_TLS | TLS_TPREL;
11555 goto dogot;
11556
11557 case R_PPC64_GOT_DTPREL16_DS:
11558 case R_PPC64_GOT_DTPREL16_LO_DS:
11559 case R_PPC64_GOT_DTPREL16_HI:
11560 case R_PPC64_GOT_DTPREL16_HA:
11561 tls_type = TLS_TLS | TLS_DTPREL;
11562 goto dogot;
11563
11564 case R_PPC64_GOT16:
11565 case R_PPC64_GOT16_LO:
11566 case R_PPC64_GOT16_HI:
11567 case R_PPC64_GOT16_HA:
11568 case R_PPC64_GOT16_DS:
11569 case R_PPC64_GOT16_LO_DS:
11570 dogot:
11571 {
11572 /* Relocation is to the entry for this symbol in the global
11573 offset table. */
11574 asection *got;
11575 bfd_vma *offp;
11576 bfd_vma off;
11577 unsigned long indx = 0;
11578
11579 if (tls_type == (TLS_TLS | TLS_LD)
11580 && (h == NULL
11581 || !h->elf.def_dynamic))
11582 offp = &ppc64_tlsld_got (input_bfd)->offset;
11583 else
11584 {
11585 struct got_entry *ent;
11586
11587 if (h != NULL)
11588 {
11589 bfd_boolean dyn = htab->elf.dynamic_sections_created;
11590 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared,
11591 &h->elf)
11592 || (info->shared
11593 && SYMBOL_REFERENCES_LOCAL (info, &h->elf)))
11594 /* This is actually a static link, or it is a
11595 -Bsymbolic link and the symbol is defined
11596 locally, or the symbol was forced to be local
11597 because of a version file. */
11598 ;
11599 else
11600 {
11601 indx = h->elf.dynindx;
11602 unresolved_reloc = FALSE;
11603 }
11604 ent = h->elf.got.glist;
11605 }
11606 else
11607 {
11608 if (local_got_ents == NULL)
11609 abort ();
11610 ent = local_got_ents[r_symndx];
11611 }
11612
11613 for (; ent != NULL; ent = ent->next)
11614 if (ent->addend == orig_addend
11615 && ent->owner == input_bfd
11616 && ent->tls_type == tls_type)
11617 break;
11618 if (ent == NULL)
11619 abort ();
11620 offp = &ent->got.offset;
11621 }
11622
11623 got = ppc64_elf_tdata (input_bfd)->got;
11624 if (got == NULL)
11625 abort ();
11626
11627 /* The offset must always be a multiple of 8. We use the
11628 least significant bit to record whether we have already
11629 processed this entry. */
11630 off = *offp;
11631 if ((off & 1) != 0)
11632 off &= ~1;
11633 else
11634 {
11635 /* Generate relocs for the dynamic linker, except in
11636 the case of TLSLD where we'll use one entry per
11637 module. */
11638 asection *relgot;
11639 bfd_boolean ifunc;
11640
11641 *offp = off | 1;
11642 relgot = NULL;
11643 ifunc = (h != NULL
11644 ? h->elf.type == STT_GNU_IFUNC
11645 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC);
11646 if ((info->shared || indx != 0)
11647 && (offp == &ppc64_tlsld_got (input_bfd)->offset
11648 || h == NULL
11649 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
11650 || h->elf.root.type != bfd_link_hash_undefweak))
11651 relgot = ppc64_elf_tdata (input_bfd)->relgot;
11652 else if (ifunc)
11653 relgot = htab->reliplt;
11654 if (relgot != NULL)
11655 {
11656 outrel.r_offset = (got->output_section->vma
11657 + got->output_offset
11658 + off);
11659 outrel.r_addend = addend;
11660 if (tls_type & (TLS_LD | TLS_GD))
11661 {
11662 outrel.r_addend = 0;
11663 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
11664 if (tls_type == (TLS_TLS | TLS_GD))
11665 {
11666 loc = relgot->contents;
11667 loc += (relgot->reloc_count++
11668 * sizeof (Elf64_External_Rela));
11669 bfd_elf64_swap_reloca_out (output_bfd,
11670 &outrel, loc);
11671 outrel.r_offset += 8;
11672 outrel.r_addend = addend;
11673 outrel.r_info
11674 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
11675 }
11676 }
11677 else if (tls_type == (TLS_TLS | TLS_DTPREL))
11678 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
11679 else if (tls_type == (TLS_TLS | TLS_TPREL))
11680 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
11681 else if (indx != 0)
11682 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
11683 else
11684 {
11685 if (ifunc)
11686 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
11687 else
11688 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
11689
11690 /* Write the .got section contents for the sake
11691 of prelink. */
11692 loc = got->contents + off;
11693 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
11694 loc);
11695 }
11696
11697 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
11698 {
11699 outrel.r_addend += relocation;
11700 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
11701 outrel.r_addend -= htab->elf.tls_sec->vma;
11702 }
11703 loc = relgot->contents;
11704 loc += (relgot->reloc_count++
11705 * sizeof (Elf64_External_Rela));
11706 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
11707 }
11708
11709 /* Init the .got section contents here if we're not
11710 emitting a reloc. */
11711 else
11712 {
11713 relocation += addend;
11714 if (tls_type == (TLS_TLS | TLS_LD))
11715 relocation = 1;
11716 else if (tls_type != 0)
11717 {
11718 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
11719 if (tls_type == (TLS_TLS | TLS_TPREL))
11720 relocation += DTP_OFFSET - TP_OFFSET;
11721
11722 if (tls_type == (TLS_TLS | TLS_GD))
11723 {
11724 bfd_put_64 (output_bfd, relocation,
11725 got->contents + off + 8);
11726 relocation = 1;
11727 }
11728 }
11729
11730 bfd_put_64 (output_bfd, relocation,
11731 got->contents + off);
11732 }
11733 }
11734
11735 if (off >= (bfd_vma) -2)
11736 abort ();
11737
11738 relocation = got->output_offset + off;
11739
11740 /* TOC base (r2) is TOC start plus 0x8000. */
11741 addend = -TOC_BASE_OFF;
11742 }
11743 break;
11744
11745 case R_PPC64_PLT16_HA:
11746 case R_PPC64_PLT16_HI:
11747 case R_PPC64_PLT16_LO:
11748 case R_PPC64_PLT32:
11749 case R_PPC64_PLT64:
11750 /* Relocation is to the entry for this symbol in the
11751 procedure linkage table. */
11752
11753 /* Resolve a PLT reloc against a local symbol directly,
11754 without using the procedure linkage table. */
11755 if (h == NULL)
11756 break;
11757
11758 /* It's possible that we didn't make a PLT entry for this
11759 symbol. This happens when statically linking PIC code,
11760 or when using -Bsymbolic. Go find a match if there is a
11761 PLT entry. */
11762 if (htab->plt != NULL)
11763 {
11764 struct plt_entry *ent;
11765 for (ent = h->elf.plt.plist; ent != NULL; ent = ent->next)
11766 if (ent->addend == orig_addend
11767 && ent->plt.offset != (bfd_vma) -1)
11768 {
11769 relocation = (htab->plt->output_section->vma
11770 + htab->plt->output_offset
11771 + ent->plt.offset);
11772 unresolved_reloc = FALSE;
11773 }
11774 }
11775 break;
11776
11777 case R_PPC64_TOC:
11778 /* Relocation value is TOC base. */
11779 relocation = TOCstart;
11780 if (r_symndx == 0)
11781 relocation += htab->stub_group[input_section->id].toc_off;
11782 else if (unresolved_reloc)
11783 ;
11784 else if (sec != NULL && sec->id <= htab->top_id)
11785 relocation += htab->stub_group[sec->id].toc_off;
11786 else
11787 unresolved_reloc = TRUE;
11788 goto dodyn;
11789
11790 /* TOC16 relocs. We want the offset relative to the TOC base,
11791 which is the address of the start of the TOC plus 0x8000.
11792 The TOC consists of sections .got, .toc, .tocbss, and .plt,
11793 in this order. */
11794 case R_PPC64_TOC16:
11795 case R_PPC64_TOC16_LO:
11796 case R_PPC64_TOC16_HI:
11797 case R_PPC64_TOC16_DS:
11798 case R_PPC64_TOC16_LO_DS:
11799 case R_PPC64_TOC16_HA:
11800 addend -= TOCstart + htab->stub_group[input_section->id].toc_off;
11801 break;
11802
11803 /* Relocate against the beginning of the section. */
11804 case R_PPC64_SECTOFF:
11805 case R_PPC64_SECTOFF_LO:
11806 case R_PPC64_SECTOFF_HI:
11807 case R_PPC64_SECTOFF_DS:
11808 case R_PPC64_SECTOFF_LO_DS:
11809 case R_PPC64_SECTOFF_HA:
11810 if (sec != NULL)
11811 addend -= sec->output_section->vma;
11812 break;
11813
11814 case R_PPC64_REL16:
11815 case R_PPC64_REL16_LO:
11816 case R_PPC64_REL16_HI:
11817 case R_PPC64_REL16_HA:
11818 break;
11819
11820 case R_PPC64_REL14:
11821 case R_PPC64_REL14_BRNTAKEN:
11822 case R_PPC64_REL14_BRTAKEN:
11823 case R_PPC64_REL24:
11824 break;
11825
11826 case R_PPC64_TPREL16:
11827 case R_PPC64_TPREL16_LO:
11828 case R_PPC64_TPREL16_HI:
11829 case R_PPC64_TPREL16_HA:
11830 case R_PPC64_TPREL16_DS:
11831 case R_PPC64_TPREL16_LO_DS:
11832 case R_PPC64_TPREL16_HIGHER:
11833 case R_PPC64_TPREL16_HIGHERA:
11834 case R_PPC64_TPREL16_HIGHEST:
11835 case R_PPC64_TPREL16_HIGHESTA:
11836 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
11837 if (info->shared)
11838 /* The TPREL16 relocs shouldn't really be used in shared
11839 libs as they will result in DT_TEXTREL being set, but
11840 support them anyway. */
11841 goto dodyn;
11842 break;
11843
11844 case R_PPC64_DTPREL16:
11845 case R_PPC64_DTPREL16_LO:
11846 case R_PPC64_DTPREL16_HI:
11847 case R_PPC64_DTPREL16_HA:
11848 case R_PPC64_DTPREL16_DS:
11849 case R_PPC64_DTPREL16_LO_DS:
11850 case R_PPC64_DTPREL16_HIGHER:
11851 case R_PPC64_DTPREL16_HIGHERA:
11852 case R_PPC64_DTPREL16_HIGHEST:
11853 case R_PPC64_DTPREL16_HIGHESTA:
11854 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
11855 break;
11856
11857 case R_PPC64_DTPMOD64:
11858 relocation = 1;
11859 addend = 0;
11860 goto dodyn;
11861
11862 case R_PPC64_TPREL64:
11863 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
11864 goto dodyn;
11865
11866 case R_PPC64_DTPREL64:
11867 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
11868 /* Fall thru */
11869
11870 /* Relocations that may need to be propagated if this is a
11871 dynamic object. */
11872 case R_PPC64_REL30:
11873 case R_PPC64_REL32:
11874 case R_PPC64_REL64:
11875 case R_PPC64_ADDR14:
11876 case R_PPC64_ADDR14_BRNTAKEN:
11877 case R_PPC64_ADDR14_BRTAKEN:
11878 case R_PPC64_ADDR16:
11879 case R_PPC64_ADDR16_DS:
11880 case R_PPC64_ADDR16_HA:
11881 case R_PPC64_ADDR16_HI:
11882 case R_PPC64_ADDR16_HIGHER:
11883 case R_PPC64_ADDR16_HIGHERA:
11884 case R_PPC64_ADDR16_HIGHEST:
11885 case R_PPC64_ADDR16_HIGHESTA:
11886 case R_PPC64_ADDR16_LO:
11887 case R_PPC64_ADDR16_LO_DS:
11888 case R_PPC64_ADDR24:
11889 case R_PPC64_ADDR32:
11890 case R_PPC64_ADDR64:
11891 case R_PPC64_UADDR16:
11892 case R_PPC64_UADDR32:
11893 case R_PPC64_UADDR64:
11894 dodyn:
11895 if ((input_section->flags & SEC_ALLOC) == 0)
11896 break;
11897
11898 if (NO_OPD_RELOCS && is_opd)
11899 break;
11900
11901 if ((info->shared
11902 && (h == NULL
11903 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
11904 || h->elf.root.type != bfd_link_hash_undefweak)
11905 && (must_be_dyn_reloc (info, r_type)
11906 || !SYMBOL_CALLS_LOCAL (info, &h->elf)))
11907 || (ELIMINATE_COPY_RELOCS
11908 && !info->shared
11909 && h != NULL
11910 && h->elf.dynindx != -1
11911 && !h->elf.non_got_ref
11912 && !h->elf.def_regular)
11913 || (!info->shared
11914 && (h != NULL
11915 ? h->elf.type == STT_GNU_IFUNC
11916 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)))
11917 {
11918 bfd_boolean skip, relocate;
11919 asection *sreloc;
11920 bfd_vma out_off;
11921
11922 /* When generating a dynamic object, these relocations
11923 are copied into the output file to be resolved at run
11924 time. */
11925
11926 skip = FALSE;
11927 relocate = FALSE;
11928
11929 out_off = _bfd_elf_section_offset (output_bfd, info,
11930 input_section, rel->r_offset);
11931 if (out_off == (bfd_vma) -1)
11932 skip = TRUE;
11933 else if (out_off == (bfd_vma) -2)
11934 skip = TRUE, relocate = TRUE;
11935 out_off += (input_section->output_section->vma
11936 + input_section->output_offset);
11937 outrel.r_offset = out_off;
11938 outrel.r_addend = rel->r_addend;
11939
11940 /* Optimize unaligned reloc use. */
11941 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
11942 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
11943 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
11944 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
11945 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
11946 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
11947 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
11948 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
11949 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
11950
11951 if (skip)
11952 memset (&outrel, 0, sizeof outrel);
11953 else if (!SYMBOL_REFERENCES_LOCAL (info, &h->elf)
11954 && !is_opd
11955 && r_type != R_PPC64_TOC)
11956 outrel.r_info = ELF64_R_INFO (h->elf.dynindx, r_type);
11957 else
11958 {
11959 /* This symbol is local, or marked to become local,
11960 or this is an opd section reloc which must point
11961 at a local function. */
11962 outrel.r_addend += relocation;
11963 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
11964 {
11965 if (is_opd && h != NULL)
11966 {
11967 /* Lie about opd entries. This case occurs
11968 when building shared libraries and we
11969 reference a function in another shared
11970 lib. The same thing happens for a weak
11971 definition in an application that's
11972 overridden by a strong definition in a
11973 shared lib. (I believe this is a generic
11974 bug in binutils handling of weak syms.)
11975 In these cases we won't use the opd
11976 entry in this lib. */
11977 unresolved_reloc = FALSE;
11978 }
11979 if (!is_opd
11980 && r_type == R_PPC64_ADDR64
11981 && (h != NULL
11982 ? h->elf.type == STT_GNU_IFUNC
11983 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
11984 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
11985 else
11986 {
11987 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
11988
11989 /* We need to relocate .opd contents for ld.so.
11990 Prelink also wants simple and consistent rules
11991 for relocs. This make all RELATIVE relocs have
11992 *r_offset equal to r_addend. */
11993 relocate = TRUE;
11994 }
11995 }
11996 else
11997 {
11998 long indx = 0;
11999
12000 if (h != NULL
12001 ? h->elf.type == STT_GNU_IFUNC
12002 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
12003 {
12004 (*_bfd_error_handler)
12005 (_("%B(%A+0x%lx): relocation %s for indirect "
12006 "function %s unsupported"),
12007 input_bfd,
12008 input_section,
12009 (long) rel->r_offset,
12010 ppc64_elf_howto_table[r_type]->name,
12011 sym_name);
12012 ret = FALSE;
12013 }
12014 else if (r_symndx == 0 || bfd_is_abs_section (sec))
12015 ;
12016 else if (sec == NULL || sec->owner == NULL)
12017 {
12018 bfd_set_error (bfd_error_bad_value);
12019 return FALSE;
12020 }
12021 else
12022 {
12023 asection *osec;
12024
12025 osec = sec->output_section;
12026 indx = elf_section_data (osec)->dynindx;
12027
12028 if (indx == 0)
12029 {
12030 if ((osec->flags & SEC_READONLY) == 0
12031 && htab->elf.data_index_section != NULL)
12032 osec = htab->elf.data_index_section;
12033 else
12034 osec = htab->elf.text_index_section;
12035 indx = elf_section_data (osec)->dynindx;
12036 }
12037 BFD_ASSERT (indx != 0);
12038
12039 /* We are turning this relocation into one
12040 against a section symbol, so subtract out
12041 the output section's address but not the
12042 offset of the input section in the output
12043 section. */
12044 outrel.r_addend -= osec->vma;
12045 }
12046
12047 outrel.r_info = ELF64_R_INFO (indx, r_type);
12048 }
12049 }
12050
12051 sreloc = elf_section_data (input_section)->sreloc;
12052 if (!htab->elf.dynamic_sections_created)
12053 sreloc = htab->reliplt;
12054 if (sreloc == NULL)
12055 abort ();
12056
12057 if (sreloc->reloc_count * sizeof (Elf64_External_Rela)
12058 >= sreloc->size)
12059 abort ();
12060 loc = sreloc->contents;
12061 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
12062 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
12063
12064 /* If this reloc is against an external symbol, it will
12065 be computed at runtime, so there's no need to do
12066 anything now. However, for the sake of prelink ensure
12067 that the section contents are a known value. */
12068 if (! relocate)
12069 {
12070 unresolved_reloc = FALSE;
12071 /* The value chosen here is quite arbitrary as ld.so
12072 ignores section contents except for the special
12073 case of .opd where the contents might be accessed
12074 before relocation. Choose zero, as that won't
12075 cause reloc overflow. */
12076 relocation = 0;
12077 addend = 0;
12078 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
12079 to improve backward compatibility with older
12080 versions of ld. */
12081 if (r_type == R_PPC64_ADDR64)
12082 addend = outrel.r_addend;
12083 /* Adjust pc_relative relocs to have zero in *r_offset. */
12084 else if (ppc64_elf_howto_table[r_type]->pc_relative)
12085 addend = (input_section->output_section->vma
12086 + input_section->output_offset
12087 + rel->r_offset);
12088 }
12089 }
12090 break;
12091
12092 case R_PPC64_COPY:
12093 case R_PPC64_GLOB_DAT:
12094 case R_PPC64_JMP_SLOT:
12095 case R_PPC64_JMP_IREL:
12096 case R_PPC64_RELATIVE:
12097 /* We shouldn't ever see these dynamic relocs in relocatable
12098 files. */
12099 /* Fall through. */
12100
12101 case R_PPC64_PLTGOT16:
12102 case R_PPC64_PLTGOT16_DS:
12103 case R_PPC64_PLTGOT16_HA:
12104 case R_PPC64_PLTGOT16_HI:
12105 case R_PPC64_PLTGOT16_LO:
12106 case R_PPC64_PLTGOT16_LO_DS:
12107 case R_PPC64_PLTREL32:
12108 case R_PPC64_PLTREL64:
12109 /* These ones haven't been implemented yet. */
12110
12111 (*_bfd_error_handler)
12112 (_("%B: relocation %s is not supported for symbol %s."),
12113 input_bfd,
12114 ppc64_elf_howto_table[r_type]->name, sym_name);
12115
12116 bfd_set_error (bfd_error_invalid_operation);
12117 ret = FALSE;
12118 continue;
12119 }
12120
12121 /* Do any further special processing. */
12122 switch (r_type)
12123 {
12124 default:
12125 break;
12126
12127 case R_PPC64_ADDR16_HA:
12128 case R_PPC64_REL16_HA:
12129 case R_PPC64_ADDR16_HIGHERA:
12130 case R_PPC64_ADDR16_HIGHESTA:
12131 case R_PPC64_TOC16_HA:
12132 case R_PPC64_SECTOFF_HA:
12133 case R_PPC64_TPREL16_HA:
12134 case R_PPC64_DTPREL16_HA:
12135 case R_PPC64_TPREL16_HIGHER:
12136 case R_PPC64_TPREL16_HIGHERA:
12137 case R_PPC64_TPREL16_HIGHEST:
12138 case R_PPC64_TPREL16_HIGHESTA:
12139 case R_PPC64_DTPREL16_HIGHER:
12140 case R_PPC64_DTPREL16_HIGHERA:
12141 case R_PPC64_DTPREL16_HIGHEST:
12142 case R_PPC64_DTPREL16_HIGHESTA:
12143 /* It's just possible that this symbol is a weak symbol
12144 that's not actually defined anywhere. In that case,
12145 'sec' would be NULL, and we should leave the symbol
12146 alone (it will be set to zero elsewhere in the link). */
12147 if (sec == NULL)
12148 break;
12149 /* Fall thru */
12150
12151 case R_PPC64_GOT16_HA:
12152 case R_PPC64_PLTGOT16_HA:
12153 case R_PPC64_PLT16_HA:
12154 case R_PPC64_GOT_TLSGD16_HA:
12155 case R_PPC64_GOT_TLSLD16_HA:
12156 case R_PPC64_GOT_TPREL16_HA:
12157 case R_PPC64_GOT_DTPREL16_HA:
12158 /* Add 0x10000 if sign bit in 0:15 is set.
12159 Bits 0:15 are not used. */
12160 addend += 0x8000;
12161 break;
12162
12163 case R_PPC64_ADDR16_DS:
12164 case R_PPC64_ADDR16_LO_DS:
12165 case R_PPC64_GOT16_DS:
12166 case R_PPC64_GOT16_LO_DS:
12167 case R_PPC64_PLT16_LO_DS:
12168 case R_PPC64_SECTOFF_DS:
12169 case R_PPC64_SECTOFF_LO_DS:
12170 case R_PPC64_TOC16_DS:
12171 case R_PPC64_TOC16_LO_DS:
12172 case R_PPC64_PLTGOT16_DS:
12173 case R_PPC64_PLTGOT16_LO_DS:
12174 case R_PPC64_GOT_TPREL16_DS:
12175 case R_PPC64_GOT_TPREL16_LO_DS:
12176 case R_PPC64_GOT_DTPREL16_DS:
12177 case R_PPC64_GOT_DTPREL16_LO_DS:
12178 case R_PPC64_TPREL16_DS:
12179 case R_PPC64_TPREL16_LO_DS:
12180 case R_PPC64_DTPREL16_DS:
12181 case R_PPC64_DTPREL16_LO_DS:
12182 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
12183 mask = 3;
12184 /* If this reloc is against an lq insn, then the value must be
12185 a multiple of 16. This is somewhat of a hack, but the
12186 "correct" way to do this by defining _DQ forms of all the
12187 _DS relocs bloats all reloc switches in this file. It
12188 doesn't seem to make much sense to use any of these relocs
12189 in data, so testing the insn should be safe. */
12190 if ((insn & (0x3f << 26)) == (56u << 26))
12191 mask = 15;
12192 if (((relocation + addend) & mask) != 0)
12193 {
12194 (*_bfd_error_handler)
12195 (_("%B: error: relocation %s not a multiple of %d"),
12196 input_bfd,
12197 ppc64_elf_howto_table[r_type]->name,
12198 mask + 1);
12199 bfd_set_error (bfd_error_bad_value);
12200 ret = FALSE;
12201 continue;
12202 }
12203 break;
12204 }
12205
12206 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
12207 because such sections are not SEC_ALLOC and thus ld.so will
12208 not process them. */
12209 if (unresolved_reloc
12210 && !((input_section->flags & SEC_DEBUGGING) != 0
12211 && h->elf.def_dynamic))
12212 {
12213 (*_bfd_error_handler)
12214 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
12215 input_bfd,
12216 input_section,
12217 (long) rel->r_offset,
12218 ppc64_elf_howto_table[(int) r_type]->name,
12219 h->elf.root.root.string);
12220 ret = FALSE;
12221 }
12222
12223 r = _bfd_final_link_relocate (ppc64_elf_howto_table[(int) r_type],
12224 input_bfd,
12225 input_section,
12226 contents,
12227 rel->r_offset,
12228 relocation,
12229 addend);
12230
12231 if (r != bfd_reloc_ok)
12232 {
12233 if (sym_name == NULL)
12234 sym_name = "(null)";
12235 if (r == bfd_reloc_overflow)
12236 {
12237 if (warned)
12238 continue;
12239 if (h != NULL
12240 && h->elf.root.type == bfd_link_hash_undefweak
12241 && ppc64_elf_howto_table[r_type]->pc_relative)
12242 {
12243 /* Assume this is a call protected by other code that
12244 detects the symbol is undefined. If this is the case,
12245 we can safely ignore the overflow. If not, the
12246 program is hosed anyway, and a little warning isn't
12247 going to help. */
12248
12249 continue;
12250 }
12251
12252 if (!((*info->callbacks->reloc_overflow)
12253 (info, (h ? &h->elf.root : NULL), sym_name,
12254 ppc64_elf_howto_table[r_type]->name,
12255 orig_addend, input_bfd, input_section, rel->r_offset)))
12256 return FALSE;
12257 }
12258 else
12259 {
12260 (*_bfd_error_handler)
12261 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
12262 input_bfd,
12263 input_section,
12264 (long) rel->r_offset,
12265 ppc64_elf_howto_table[r_type]->name,
12266 sym_name,
12267 (int) r);
12268 ret = FALSE;
12269 }
12270 }
12271 }
12272
12273 /* If we're emitting relocations, then shortly after this function
12274 returns, reloc offsets and addends for this section will be
12275 adjusted. Worse, reloc symbol indices will be for the output
12276 file rather than the input. Save a copy of the relocs for
12277 opd_entry_value. */
12278 if (is_opd && (info->emitrelocations || info->relocatable))
12279 {
12280 bfd_size_type amt;
12281 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
12282 rel = bfd_alloc (input_bfd, amt);
12283 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd_relocs == NULL);
12284 ppc64_elf_tdata (input_bfd)->opd_relocs = rel;
12285 if (rel == NULL)
12286 return FALSE;
12287 memcpy (rel, relocs, amt);
12288 }
12289 return ret;
12290 }
12291
12292 /* Adjust the value of any local symbols in opd sections. */
12293
12294 static int
12295 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
12296 const char *name ATTRIBUTE_UNUSED,
12297 Elf_Internal_Sym *elfsym,
12298 asection *input_sec,
12299 struct elf_link_hash_entry *h)
12300 {
12301 struct _opd_sec_data *opd;
12302 long adjust;
12303 bfd_vma value;
12304
12305 if (h != NULL)
12306 return 1;
12307
12308 opd = get_opd_info (input_sec);
12309 if (opd == NULL || opd->adjust == NULL)
12310 return 1;
12311
12312 value = elfsym->st_value - input_sec->output_offset;
12313 if (!info->relocatable)
12314 value -= input_sec->output_section->vma;
12315
12316 adjust = opd->adjust[value / 8];
12317 if (adjust == -1)
12318 return 2;
12319
12320 elfsym->st_value += adjust;
12321 return 1;
12322 }
12323
12324 /* Finish up dynamic symbol handling. We set the contents of various
12325 dynamic sections here. */
12326
12327 static bfd_boolean
12328 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
12329 struct bfd_link_info *info,
12330 struct elf_link_hash_entry *h,
12331 Elf_Internal_Sym *sym)
12332 {
12333 struct ppc_link_hash_table *htab;
12334 struct plt_entry *ent;
12335 Elf_Internal_Rela rela;
12336 bfd_byte *loc;
12337
12338 htab = ppc_hash_table (info);
12339
12340 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
12341 if (ent->plt.offset != (bfd_vma) -1)
12342 {
12343 /* This symbol has an entry in the procedure linkage
12344 table. Set it up. */
12345 if (!htab->elf.dynamic_sections_created
12346 || h->dynindx == -1)
12347 {
12348 BFD_ASSERT (h->type == STT_GNU_IFUNC
12349 && h->def_regular
12350 && (h->root.type == bfd_link_hash_defined
12351 || h->root.type == bfd_link_hash_defweak));
12352 rela.r_offset = (htab->iplt->output_section->vma
12353 + htab->iplt->output_offset
12354 + ent->plt.offset);
12355 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
12356 rela.r_addend = (h->root.u.def.value
12357 + h->root.u.def.section->output_offset
12358 + h->root.u.def.section->output_section->vma
12359 + ent->addend);
12360 loc = (htab->reliplt->contents
12361 + (htab->reliplt->reloc_count++
12362 * sizeof (Elf64_External_Rela)));
12363 }
12364 else
12365 {
12366 rela.r_offset = (htab->plt->output_section->vma
12367 + htab->plt->output_offset
12368 + ent->plt.offset);
12369 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
12370 rela.r_addend = ent->addend;
12371 loc = (htab->relplt->contents
12372 + ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE)
12373 / (PLT_ENTRY_SIZE / sizeof (Elf64_External_Rela))));
12374 }
12375 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
12376 }
12377
12378 if (h->needs_copy)
12379 {
12380 /* This symbol needs a copy reloc. Set it up. */
12381
12382 if (h->dynindx == -1
12383 || (h->root.type != bfd_link_hash_defined
12384 && h->root.type != bfd_link_hash_defweak)
12385 || htab->relbss == NULL)
12386 abort ();
12387
12388 rela.r_offset = (h->root.u.def.value
12389 + h->root.u.def.section->output_section->vma
12390 + h->root.u.def.section->output_offset);
12391 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
12392 rela.r_addend = 0;
12393 loc = htab->relbss->contents;
12394 loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela);
12395 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
12396 }
12397
12398 /* Mark some specially defined symbols as absolute. */
12399 if (strcmp (h->root.root.string, "_DYNAMIC") == 0)
12400 sym->st_shndx = SHN_ABS;
12401
12402 return TRUE;
12403 }
12404
12405 /* Used to decide how to sort relocs in an optimal manner for the
12406 dynamic linker, before writing them out. */
12407
12408 static enum elf_reloc_type_class
12409 ppc64_elf_reloc_type_class (const Elf_Internal_Rela *rela)
12410 {
12411 enum elf_ppc64_reloc_type r_type;
12412
12413 r_type = ELF64_R_TYPE (rela->r_info);
12414 switch (r_type)
12415 {
12416 case R_PPC64_RELATIVE:
12417 return reloc_class_relative;
12418 case R_PPC64_JMP_SLOT:
12419 return reloc_class_plt;
12420 case R_PPC64_COPY:
12421 return reloc_class_copy;
12422 default:
12423 return reloc_class_normal;
12424 }
12425 }
12426
12427 /* Finish up the dynamic sections. */
12428
12429 static bfd_boolean
12430 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
12431 struct bfd_link_info *info)
12432 {
12433 struct ppc_link_hash_table *htab;
12434 bfd *dynobj;
12435 asection *sdyn;
12436
12437 htab = ppc_hash_table (info);
12438 dynobj = htab->elf.dynobj;
12439 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
12440
12441 if (htab->elf.dynamic_sections_created)
12442 {
12443 Elf64_External_Dyn *dyncon, *dynconend;
12444
12445 if (sdyn == NULL || htab->got == NULL)
12446 abort ();
12447
12448 dyncon = (Elf64_External_Dyn *) sdyn->contents;
12449 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
12450 for (; dyncon < dynconend; dyncon++)
12451 {
12452 Elf_Internal_Dyn dyn;
12453 asection *s;
12454
12455 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
12456
12457 switch (dyn.d_tag)
12458 {
12459 default:
12460 continue;
12461
12462 case DT_PPC64_GLINK:
12463 s = htab->glink;
12464 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
12465 /* We stupidly defined DT_PPC64_GLINK to be the start
12466 of glink rather than the first entry point, which is
12467 what ld.so needs, and now have a bigger stub to
12468 support automatic multiple TOCs. */
12469 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 32;
12470 break;
12471
12472 case DT_PPC64_OPD:
12473 s = bfd_get_section_by_name (output_bfd, ".opd");
12474 if (s == NULL)
12475 continue;
12476 dyn.d_un.d_ptr = s->vma;
12477 break;
12478
12479 case DT_PPC64_OPDSZ:
12480 s = bfd_get_section_by_name (output_bfd, ".opd");
12481 if (s == NULL)
12482 continue;
12483 dyn.d_un.d_val = s->size;
12484 break;
12485
12486 case DT_PLTGOT:
12487 s = htab->plt;
12488 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
12489 break;
12490
12491 case DT_JMPREL:
12492 s = htab->relplt;
12493 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
12494 break;
12495
12496 case DT_PLTRELSZ:
12497 dyn.d_un.d_val = htab->relplt->size;
12498 break;
12499
12500 case DT_RELASZ:
12501 /* Don't count procedure linkage table relocs in the
12502 overall reloc count. */
12503 s = htab->relplt;
12504 if (s == NULL)
12505 continue;
12506 dyn.d_un.d_val -= s->size;
12507 break;
12508
12509 case DT_RELA:
12510 /* We may not be using the standard ELF linker script.
12511 If .rela.plt is the first .rela section, we adjust
12512 DT_RELA to not include it. */
12513 s = htab->relplt;
12514 if (s == NULL)
12515 continue;
12516 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
12517 continue;
12518 dyn.d_un.d_ptr += s->size;
12519 break;
12520 }
12521
12522 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
12523 }
12524 }
12525
12526 if (htab->got != NULL && htab->got->size != 0)
12527 {
12528 /* Fill in the first entry in the global offset table.
12529 We use it to hold the link-time TOCbase. */
12530 bfd_put_64 (output_bfd,
12531 elf_gp (output_bfd) + TOC_BASE_OFF,
12532 htab->got->contents);
12533
12534 /* Set .got entry size. */
12535 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 8;
12536 }
12537
12538 if (htab->plt != NULL && htab->plt->size != 0)
12539 {
12540 /* Set .plt entry size. */
12541 elf_section_data (htab->plt->output_section)->this_hdr.sh_entsize
12542 = PLT_ENTRY_SIZE;
12543 }
12544
12545 /* brlt is SEC_LINKER_CREATED, so we need to write out relocs for
12546 brlt ourselves if emitrelocations. */
12547 if (htab->brlt != NULL
12548 && htab->brlt->reloc_count != 0
12549 && !_bfd_elf_link_output_relocs (output_bfd,
12550 htab->brlt,
12551 &elf_section_data (htab->brlt)->rel_hdr,
12552 elf_section_data (htab->brlt)->relocs,
12553 NULL))
12554 return FALSE;
12555
12556 if (htab->glink != NULL
12557 && htab->glink->reloc_count != 0
12558 && !_bfd_elf_link_output_relocs (output_bfd,
12559 htab->glink,
12560 &elf_section_data (htab->glink)->rel_hdr,
12561 elf_section_data (htab->glink)->relocs,
12562 NULL))
12563 return FALSE;
12564
12565 /* We need to handle writing out multiple GOT sections ourselves,
12566 since we didn't add them to DYNOBJ. We know dynobj is the first
12567 bfd. */
12568 while ((dynobj = dynobj->link_next) != NULL)
12569 {
12570 asection *s;
12571
12572 if (!is_ppc64_elf (dynobj))
12573 continue;
12574
12575 s = ppc64_elf_tdata (dynobj)->got;
12576 if (s != NULL
12577 && s->size != 0
12578 && s->output_section != bfd_abs_section_ptr
12579 && !bfd_set_section_contents (output_bfd, s->output_section,
12580 s->contents, s->output_offset,
12581 s->size))
12582 return FALSE;
12583 s = ppc64_elf_tdata (dynobj)->relgot;
12584 if (s != NULL
12585 && s->size != 0
12586 && s->output_section != bfd_abs_section_ptr
12587 && !bfd_set_section_contents (output_bfd, s->output_section,
12588 s->contents, s->output_offset,
12589 s->size))
12590 return FALSE;
12591 }
12592
12593 return TRUE;
12594 }
12595
12596 #include "elf64-target.h"
git-cvsimport of binutils cvsroot